Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

76 files changed, 76447 insertions, 0 deletions

diff --git a/fs/smb/client/Kconfig b/fs/smb/client/Kconfig
new file mode 100644
index 0000000000..2927bd174a
--- /dev/null
+++ b/fs/smb/client/Kconfig
@@ -0,0 +1,206 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config CIFS
+	tristate "SMB3 and CIFS support (advanced network filesystem)"
+	depends on INET
+	select NLS
+	select NLS_UCS2_UTILS
+	select CRYPTO
+	select CRYPTO_MD5
+	select CRYPTO_SHA256
+	select CRYPTO_SHA512
+	select CRYPTO_CMAC
+	select CRYPTO_HMAC
+	select CRYPTO_AEAD2
+	select CRYPTO_CCM
+	select CRYPTO_GCM
+	select CRYPTO_ECB
+	select CRYPTO_AES
+	select KEYS
+	select DNS_RESOLVER
+	select ASN1
+	select OID_REGISTRY
+	select NETFS_SUPPORT
+	help
+	  This is the client VFS module for the SMB3 family of network file
+	  protocols (including the most recent, most secure dialect SMB3.1.1).
+	  This module also includes support for earlier dialects such as
+	  SMB2.1, SMB2 and even the old Common Internet File System (CIFS)
+	  protocol.  CIFS was the successor to the original network filesystem
+	  protocol, Server Message Block (SMB ie SMB1), the native file sharing
+	  mechanism for most early PC operating systems.
+
+	  The SMB3.1.1 protocol is supported by most modern operating systems
+	  and NAS appliances (e.g. Samba, Windows 11, Windows Server 2022,
+	  MacOS) and even in the cloud (e.g. Microsoft Azure) and also by the
+	  Linux kernel server, ksmbd.  Support for the older CIFS protocol was
+	  included in Windows NT4, 2000 and XP (and later). Use of dialects
+	  older than SMB2.1 is often discouraged on public networks.
+	  This module also provides limited support for OS/2 and Windows ME
+	  and similar very old servers.
+
+	  This module provides an advanced network file system client for
+	  mounting to SMB3 (and CIFS) compliant servers.  It includes support
+	  for DFS (hierarchical name space), secure per-user session
+	  establishment via Kerberos or NTLMv2, RDMA (smbdirect), advanced
+	  security features, per-share encryption, packet-signing, snapshots,
+	  directory leases, safe distributed caching (leases), multichannel,
+	  Unicode and other internationalization improvements.
+
+	  In general, the default dialects, SMB3 and later, enable better
+	  performance, security and features, than would be possible with CIFS.
+
+	  If you need to mount to Samba, Azure, ksmbd, Macs or Windows from this
+	  machine, say Y.
+
+config CIFS_STATS2
+	bool "Extended statistics"
+	depends on CIFS
+	default y
+	help
+	  Enabling this option will allow more detailed statistics on SMB
+	  request timing to be displayed in /proc/fs/cifs/DebugData and also
+	  allow optional logging of slow responses to dmesg (depending on the
+	  value of /proc/fs/cifs/cifsFYI). See Documentation/admin-guide/cifs/usage.rst
+	  for more details. These additional statistics may have a minor effect
+	  on performance and memory utilization.
+
+	  If unsure, say Y.
+
+config CIFS_ALLOW_INSECURE_LEGACY
+	bool "Support legacy servers which use less secure dialects"
+	depends on CIFS
+	default y
+	help
+	  Modern dialects, SMB2.1 and later (including SMB3 and 3.1.1), have
+	  additional security features, including protection against
+	  man-in-the-middle attacks and stronger crypto hashes, so the use
+	  of legacy dialects (SMB1/CIFS and SMB2.0) is discouraged.
+
+	  Disabling this option prevents users from using vers=1.0 or vers=2.0
+	  on mounts with cifs.ko
+
+	  If unsure, say Y.
+
+config CIFS_UPCALL
+	bool "Kerberos/SPNEGO advanced session setup"
+	depends on CIFS
+	help
+	  Enables an upcall mechanism for CIFS which accesses userspace helper
+	  utilities to provide SPNEGO packaged (RFC 4178) Kerberos tickets
+	  which are needed to mount to certain secure servers (for which more
+	  secure Kerberos authentication is required). If unsure, say Y.
+
+config CIFS_XATTR
+	bool "CIFS extended attributes"
+	depends on CIFS
+	help
+	  Extended attributes are name:value pairs associated with inodes by
+	  the kernel or by users (see the attr(5) manual page for details).
+	  CIFS maps the name of extended attributes beginning with the user
+	  namespace prefix to SMB/CIFS EAs.  EAs are stored on Windows
+	  servers without the user namespace prefix, but their names are
+	  seen by Linux cifs clients prefaced by the user namespace prefix.
+	  The system namespace (used by some filesystems to store ACLs) is
+	  not supported at this time.
+
+	  If unsure, say Y.
+
+config CIFS_POSIX
+	bool "CIFS POSIX Extensions"
+	depends on CIFS && CIFS_ALLOW_INSECURE_LEGACY && CIFS_XATTR
+	help
+	  Enabling this option will cause the cifs client to attempt to
+	  negotiate a feature of the older cifs dialect with servers, such as
+	  Samba 3.0.5 or later, that optionally can handle more POSIX like
+	  (rather than Windows like) file behavior.  It also enables support
+	  for POSIX ACLs (getfacl and setfacl) to servers (such as Samba 3.10
+	  and later) which can negotiate CIFS POSIX ACL support.  This config
+	  option is not needed when mounting with SMB3.1.1. If unsure, say N.
+
+config CIFS_DEBUG
+	bool "Enable CIFS debugging routines"
+	default y
+	depends on CIFS
+	help
+	  Enabling this option adds helpful debugging messages to
+	  the cifs code which increases the size of the cifs module.
+	  If unsure, say Y.
+
+config CIFS_DEBUG2
+	bool "Enable additional CIFS debugging routines"
+	depends on CIFS_DEBUG
+	help
+	  Enabling this option adds a few more debugging routines
+	  to the cifs code which slightly increases the size of
+	  the cifs module and can cause additional logging of debug
+	  messages in some error paths, slowing performance. This
+	  option can be turned off unless you are debugging
+	  cifs problems.  If unsure, say N.
+
+config CIFS_DEBUG_DUMP_KEYS
+	bool "Dump encryption keys for offline decryption (Unsafe)"
+	depends on CIFS_DEBUG
+	help
+	  Enabling this will dump the encryption and decryption keys
+	  used to communicate on an encrypted share connection on the
+	  console. This allows Wireshark to decrypt and dissect
+	  encrypted network captures. Enable this carefully.
+	  If unsure, say N.
+
+config CIFS_DFS_UPCALL
+	bool "DFS feature support"
+	depends on CIFS
+	help
+	  Distributed File System (DFS) support is used to access shares
+	  transparently in an enterprise name space, even if the share
+	  moves to a different server.  This feature also enables
+	  an upcall mechanism for CIFS which contacts userspace helper
+	  utilities to provide server name resolution (host names to
+	  IP addresses) which is needed in order to reconnect to
+	  servers if their addresses change or for implicit mounts of
+	  DFS junction points. If unsure, say Y.
+
+config CIFS_SWN_UPCALL
+	bool "SWN feature support"
+	depends on CIFS
+	help
+	  The Service Witness Protocol (SWN) is used to get notifications
+	  from a highly available server of resource state changes. This
+	  feature enables an upcall mechanism for CIFS which contacts a
+	  userspace daemon to establish the DCE/RPC connection to retrieve
+	  the cluster available interfaces and resource change notifications.
+	  If unsure, say Y.
+
+config CIFS_NFSD_EXPORT
+	bool "Allow nfsd to export CIFS file system"
+	depends on CIFS && BROKEN
+	help
+	  Allows NFS server to export a CIFS mounted share (nfsd over cifs)
+
+if CIFS
+
+config CIFS_SMB_DIRECT
+	bool "SMB Direct support"
+	depends on CIFS=m && INFINIBAND && INFINIBAND_ADDR_TRANS || CIFS=y && INFINIBAND=y && INFINIBAND_ADDR_TRANS=y
+	help
+	  Enables SMB Direct support for SMB 3.0, 3.02 and 3.1.1.
+	  SMB Direct allows transferring SMB packets over RDMA. If unsure,
+	  say Y.
+
+config CIFS_FSCACHE
+	bool "Provide CIFS client caching support"
+	depends on CIFS=m && FSCACHE || CIFS=y && FSCACHE=y
+	help
+	  Makes CIFS FS-Cache capable. Say Y here if you want your CIFS data
+	  to be cached locally on disk through the general filesystem cache
+	  manager. If unsure, say N.
+
+config CIFS_ROOT
+	bool "SMB root file system (Experimental)"
+	depends on CIFS=y && IP_PNP
+	help
+	  Enables root file system support over SMB protocol.
+
+	  Most people say N here.
+
+endif
diff --git a/fs/smb/client/Makefile b/fs/smb/client/Makefile
new file mode 100644
index 0000000000..0b07eb94c9
--- /dev/null
+++ b/fs/smb/client/Makefile
@@ -0,0 +1,35 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for Linux CIFS/SMB2/SMB3 VFS client
+#
+ccflags-y += -I$(src)		# needed for trace events
+obj-$(CONFIG_CIFS) += cifs.o
+
+cifs-y := trace.o cifsfs.o cifs_debug.o connect.o dir.o file.o \
+	  inode.o link.o misc.o netmisc.o smbencrypt.o transport.o \
+	  cached_dir.o cifs_unicode.o nterr.o cifsencrypt.o \
+	  readdir.o ioctl.o sess.o export.o unc.o winucase.o \
+	  smb2ops.o smb2maperror.o smb2transport.o \
+	  smb2misc.o smb2pdu.o smb2inode.o smb2file.o cifsacl.o fs_context.o \
+	  dns_resolve.o cifs_spnego_negtokeninit.asn1.o asn1.o \
+	  namespace.o
+
+$(obj)/asn1.o: $(obj)/cifs_spnego_negtokeninit.asn1.h
+
+$(obj)/cifs_spnego_negtokeninit.asn1.o: $(obj)/cifs_spnego_negtokeninit.asn1.c $(obj)/cifs_spnego_negtokeninit.asn1.h
+
+cifs-$(CONFIG_CIFS_XATTR) += xattr.o
+
+cifs-$(CONFIG_CIFS_UPCALL) += cifs_spnego.o
+
+cifs-$(CONFIG_CIFS_DFS_UPCALL) += dfs_cache.o dfs.o
+
+cifs-$(CONFIG_CIFS_SWN_UPCALL) += netlink.o cifs_swn.o
+
+cifs-$(CONFIG_CIFS_FSCACHE) += fscache.o
+
+cifs-$(CONFIG_CIFS_SMB_DIRECT) += smbdirect.o
+
+cifs-$(CONFIG_CIFS_ROOT) += cifsroot.o
+
+cifs-$(CONFIG_CIFS_ALLOW_INSECURE_LEGACY) += smb1ops.o cifssmb.o
diff --git a/fs/smb/client/asn1.c b/fs/smb/client/asn1.c
new file mode 100644
index 0000000000..b5724ef9f1
--- /dev/null
+++ b/fs/smb/client/asn1.c
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/oid_registry.h>
+#include "cifsglob.h"
+#include "cifs_debug.h"
+#include "cifsproto.h"
+#include "cifs_spnego_negtokeninit.asn1.h"
+
+int
+decode_negTokenInit(unsigned char *security_blob, int length,
+		    struct TCP_Server_Info *server)
+{
+	if (asn1_ber_decoder(&cifs_spnego_negtokeninit_decoder, server,
+			     security_blob, length) == 0)
+		return 1;
+	else
+		return 0;
+}
+
+int cifs_gssapi_this_mech(void *context, size_t hdrlen,
+			  unsigned char tag, const void *value, size_t vlen)
+{
+	enum OID oid;
+
+	oid = look_up_OID(value, vlen);
+	if (oid != OID_spnego) {
+		char buf[50];
+
+		sprint_oid(value, vlen, buf, sizeof(buf));
+		cifs_dbg(FYI, "Error decoding negTokenInit header: unexpected OID %s\n",
+			 buf);
+		return -EBADMSG;
+	}
+	return 0;
+}
+
+int cifs_neg_token_init_mech_type(void *context, size_t hdrlen,
+				  unsigned char tag,
+				  const void *value, size_t vlen)
+{
+	struct TCP_Server_Info *server = context;
+	enum OID oid;
+
+	oid = look_up_OID(value, vlen);
+	if (oid == OID_mskrb5)
+		server->sec_mskerberos = true;
+	else if (oid == OID_krb5u2u)
+		server->sec_kerberosu2u = true;
+	else if (oid == OID_krb5)
+		server->sec_kerberos = true;
+	else if (oid == OID_ntlmssp)
+		server->sec_ntlmssp = true;
+	else {
+		char buf[50];
+
+		sprint_oid(value, vlen, buf, sizeof(buf));
+		cifs_dbg(FYI, "Decoding negTokenInit: unsupported OID %s\n",
+			 buf);
+	}
+	return 0;
+}
diff --git a/fs/smb/client/cached_dir.c b/fs/smb/client/cached_dir.c
new file mode 100644
index 0000000000..d64a306a41
--- /dev/null
+++ b/fs/smb/client/cached_dir.c
@@ -0,0 +1,696 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  Functions to handle the cached directory entries
+ *
+ *  Copyright (c) 2022, Ronnie Sahlberg <lsahlber@redhat.com>
+ */
+
+#include <linux/namei.h>
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "smb2proto.h"
+#include "cached_dir.h"
+
+static struct cached_fid *init_cached_dir(const char *path);
+static void free_cached_dir(struct cached_fid *cfid);
+static void smb2_close_cached_fid(struct kref *ref);
+static void cfids_laundromat_worker(struct work_struct *work);
+
+static struct cached_fid *find_or_create_cached_dir(struct cached_fids *cfids,
+						    const char *path,
+						    bool lookup_only,
+						    __u32 max_cached_dirs)
+{
+	struct cached_fid *cfid;
+
+	spin_lock(&cfids->cfid_list_lock);
+	list_for_each_entry(cfid, &cfids->entries, entry) {
+		if (!strcmp(cfid->path, path)) {
+			/*
+			 * If it doesn't have a lease it is either not yet
+			 * fully cached or it may be in the process of
+			 * being deleted due to a lease break.
+			 */
+			if (!cfid->time || !cfid->has_lease) {
+				spin_unlock(&cfids->cfid_list_lock);
+				return NULL;
+			}
+			kref_get(&cfid->refcount);
+			spin_unlock(&cfids->cfid_list_lock);
+			return cfid;
+		}
+	}
+	if (lookup_only) {
+		spin_unlock(&cfids->cfid_list_lock);
+		return NULL;
+	}
+	if (cfids->num_entries >= max_cached_dirs) {
+		spin_unlock(&cfids->cfid_list_lock);
+		return NULL;
+	}
+	cfid = init_cached_dir(path);
+	if (cfid == NULL) {
+		spin_unlock(&cfids->cfid_list_lock);
+		return NULL;
+	}
+	cfid->cfids = cfids;
+	cfids->num_entries++;
+	list_add(&cfid->entry, &cfids->entries);
+	cfid->on_list = true;
+	kref_get(&cfid->refcount);
+	spin_unlock(&cfids->cfid_list_lock);
+	return cfid;
+}
+
+static struct dentry *
+path_to_dentry(struct cifs_sb_info *cifs_sb, const char *path)
+{
+	struct dentry *dentry;
+	const char *s, *p;
+	char sep;
+
+	sep = CIFS_DIR_SEP(cifs_sb);
+	dentry = dget(cifs_sb->root);
+	s = path;
+
+	do {
+		struct inode *dir = d_inode(dentry);
+		struct dentry *child;
+
+		if (!S_ISDIR(dir->i_mode)) {
+			dput(dentry);
+			dentry = ERR_PTR(-ENOTDIR);
+			break;
+		}
+
+		/* skip separators */
+		while (*s == sep)
+			s++;
+		if (!*s)
+			break;
+		p = s++;
+		/* next separator */
+		while (*s && *s != sep)
+			s++;
+
+		child = lookup_positive_unlocked(p, dentry, s - p);
+		dput(dentry);
+		dentry = child;
+	} while (!IS_ERR(dentry));
+	return dentry;
+}
+
+static const char *path_no_prefix(struct cifs_sb_info *cifs_sb,
+				  const char *path)
+{
+	size_t len = 0;
+
+	if (!*path)
+		return path;
+
+	if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) &&
+	    cifs_sb->prepath) {
+		len = strlen(cifs_sb->prepath) + 1;
+		if (unlikely(len > strlen(path)))
+			return ERR_PTR(-EINVAL);
+	}
+	return path + len;
+}
+
+/*
+ * Open the and cache a directory handle.
+ * If error then *cfid is not initialized.
+ */
+int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
+		    const char *path,
+		    struct cifs_sb_info *cifs_sb,
+		    bool lookup_only, struct cached_fid **ret_cfid)
+{
+	struct cifs_ses *ses;
+	struct TCP_Server_Info *server;
+	struct cifs_open_parms oparms;
+	struct smb2_create_rsp *o_rsp = NULL;
+	struct smb2_query_info_rsp *qi_rsp = NULL;
+	int resp_buftype[2];
+	struct smb_rqst rqst[2];
+	struct kvec rsp_iov[2];
+	struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
+	struct kvec qi_iov[1];
+	int rc, flags = 0;
+	__le16 *utf16_path = NULL;
+	u8 oplock = SMB2_OPLOCK_LEVEL_II;
+	struct cifs_fid *pfid;
+	struct dentry *dentry = NULL;
+	struct cached_fid *cfid;
+	struct cached_fids *cfids;
+	const char *npath;
+
+	if (tcon == NULL || tcon->cfids == NULL || tcon->nohandlecache ||
+	    is_smb1_server(tcon->ses->server) || (dir_cache_timeout == 0))
+		return -EOPNOTSUPP;
+
+	ses = tcon->ses;
+	server = ses->server;
+	cfids = tcon->cfids;
+
+	if (!server->ops->new_lease_key)
+		return -EIO;
+
+	if (cifs_sb->root == NULL)
+		return -ENOENT;
+
+	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
+	if (!utf16_path)
+		return -ENOMEM;
+
+	cfid = find_or_create_cached_dir(cfids, path, lookup_only, tcon->max_cached_dirs);
+	if (cfid == NULL) {
+		kfree(utf16_path);
+		return -ENOENT;
+	}
+	/*
+	 * Return cached fid if it has a lease.  Otherwise, it is either a new
+	 * entry or laundromat worker removed it from @cfids->entries.  Caller
+	 * will put last reference if the latter.
+	 */
+	spin_lock(&cfids->cfid_list_lock);
+	if (cfid->has_lease) {
+		spin_unlock(&cfids->cfid_list_lock);
+		*ret_cfid = cfid;
+		kfree(utf16_path);
+		return 0;
+	}
+	spin_unlock(&cfids->cfid_list_lock);
+
+	/*
+	 * Skip any prefix paths in @path as lookup_positive_unlocked() ends up
+	 * calling ->lookup() which already adds those through
+	 * build_path_from_dentry().  Also, do it earlier as we might reconnect
+	 * below when trying to send compounded request and then potentially
+	 * having a different prefix path (e.g. after DFS failover).
+	 */
+	npath = path_no_prefix(cifs_sb, path);
+	if (IS_ERR(npath)) {
+		rc = PTR_ERR(npath);
+		goto out;
+	}
+
+	if (!npath[0]) {
+		dentry = dget(cifs_sb->root);
+	} else {
+		dentry = path_to_dentry(cifs_sb, npath);
+		if (IS_ERR(dentry)) {
+			rc = -ENOENT;
+			goto out;
+		}
+	}
+	cfid->dentry = dentry;
+
+	/*
+	 * We do not hold the lock for the open because in case
+	 * SMB2_open needs to reconnect.
+	 * This is safe because no other thread will be able to get a ref
+	 * to the cfid until we have finished opening the file and (possibly)
+	 * acquired a lease.
+	 */
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	pfid = &cfid->fid;
+	server->ops->new_lease_key(pfid);
+
+	memset(rqst, 0, sizeof(rqst));
+	resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
+	memset(rsp_iov, 0, sizeof(rsp_iov));
+
+	/* Open */
+	memset(&open_iov, 0, sizeof(open_iov));
+	rqst[0].rq_iov = open_iov;
+	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.path = path,
+		.create_options = cifs_create_options(cifs_sb, CREATE_NOT_FILE),
+		.desired_access =  FILE_READ_DATA | FILE_READ_ATTRIBUTES,
+		.disposition = FILE_OPEN,
+		.fid = pfid,
+	};
+
+	rc = SMB2_open_init(tcon, server,
+			    &rqst[0], &oplock, &oparms, utf16_path);
+	if (rc)
+		goto oshr_free;
+	smb2_set_next_command(tcon, &rqst[0]);
+
+	memset(&qi_iov, 0, sizeof(qi_iov));
+	rqst[1].rq_iov = qi_iov;
+	rqst[1].rq_nvec = 1;
+
+	rc = SMB2_query_info_init(tcon, server,
+				  &rqst[1], COMPOUND_FID,
+				  COMPOUND_FID, FILE_ALL_INFORMATION,
+				  SMB2_O_INFO_FILE, 0,
+				  sizeof(struct smb2_file_all_info) +
+				  PATH_MAX * 2, 0, NULL);
+	if (rc)
+		goto oshr_free;
+
+	smb2_set_related(&rqst[1]);
+
+	/*
+	 * Set @cfid->has_lease to true before sending out compounded request so
+	 * its lease reference can be put in cached_dir_lease_break() due to a
+	 * potential lease break right after the request is sent or while @cfid
+	 * is still being cached.  Concurrent processes won't be to use it yet
+	 * due to @cfid->time being zero.
+	 */
+	cfid->has_lease = true;
+
+	rc = compound_send_recv(xid, ses, server,
+				flags, 2, rqst,
+				resp_buftype, rsp_iov);
+	if (rc) {
+		if (rc == -EREMCHG) {
+			tcon->need_reconnect = true;
+			pr_warn_once("server share %s deleted\n",
+				     tcon->tree_name);
+		}
+		goto oshr_free;
+	}
+	cfid->tcon = tcon;
+	cfid->is_open = true;
+
+	spin_lock(&cfids->cfid_list_lock);
+
+	o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
+	oparms.fid->persistent_fid = o_rsp->PersistentFileId;
+	oparms.fid->volatile_fid = o_rsp->VolatileFileId;
+#ifdef CONFIG_CIFS_DEBUG2
+	oparms.fid->mid = le64_to_cpu(o_rsp->hdr.MessageId);
+#endif /* CIFS_DEBUG2 */
+
+
+	if (o_rsp->OplockLevel != SMB2_OPLOCK_LEVEL_LEASE) {
+		spin_unlock(&cfids->cfid_list_lock);
+		rc = -EINVAL;
+		goto oshr_free;
+	}
+
+	rc = smb2_parse_contexts(server, rsp_iov,
+				 &oparms.fid->epoch,
+				 oparms.fid->lease_key,
+				 &oplock, NULL, NULL);
+	if (rc) {
+		spin_unlock(&cfids->cfid_list_lock);
+		goto oshr_free;
+	}
+
+	rc = -EINVAL;
+	if (!(oplock & SMB2_LEASE_READ_CACHING_HE)) {
+		spin_unlock(&cfids->cfid_list_lock);
+		goto oshr_free;
+	}
+	qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
+	if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info)) {
+		spin_unlock(&cfids->cfid_list_lock);
+		goto oshr_free;
+	}
+	if (!smb2_validate_and_copy_iov(
+				le16_to_cpu(qi_rsp->OutputBufferOffset),
+				sizeof(struct smb2_file_all_info),
+				&rsp_iov[1], sizeof(struct smb2_file_all_info),
+				(char *)&cfid->file_all_info))
+		cfid->file_all_info_is_valid = true;
+
+	cfid->time = jiffies;
+	spin_unlock(&cfids->cfid_list_lock);
+	/* At this point the directory handle is fully cached */
+	rc = 0;
+
+oshr_free:
+	SMB2_open_free(&rqst[0]);
+	SMB2_query_info_free(&rqst[1]);
+	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
+	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
+	if (rc) {
+		spin_lock(&cfids->cfid_list_lock);
+		if (cfid->on_list) {
+			list_del(&cfid->entry);
+			cfid->on_list = false;
+			cfids->num_entries--;
+		}
+		if (cfid->has_lease) {
+			/*
+			 * We are guaranteed to have two references at this
+			 * point. One for the caller and one for a potential
+			 * lease. Release the Lease-ref so that the directory
+			 * will be closed when the caller closes the cached
+			 * handle.
+			 */
+			cfid->has_lease = false;
+			spin_unlock(&cfids->cfid_list_lock);
+			kref_put(&cfid->refcount, smb2_close_cached_fid);
+			goto out;
+		}
+		spin_unlock(&cfids->cfid_list_lock);
+	}
+out:
+	if (rc) {
+		if (cfid->is_open)
+			SMB2_close(0, cfid->tcon, cfid->fid.persistent_fid,
+				   cfid->fid.volatile_fid);
+		free_cached_dir(cfid);
+	} else {
+		*ret_cfid = cfid;
+		atomic_inc(&tcon->num_remote_opens);
+	}
+	kfree(utf16_path);
+	return rc;
+}
+
+int open_cached_dir_by_dentry(struct cifs_tcon *tcon,
+			      struct dentry *dentry,
+			      struct cached_fid **ret_cfid)
+{
+	struct cached_fid *cfid;
+	struct cached_fids *cfids = tcon->cfids;
+
+	if (cfids == NULL)
+		return -ENOENT;
+
+	spin_lock(&cfids->cfid_list_lock);
+	list_for_each_entry(cfid, &cfids->entries, entry) {
+		if (dentry && cfid->dentry == dentry) {
+			cifs_dbg(FYI, "found a cached root file handle by dentry\n");
+			kref_get(&cfid->refcount);
+			*ret_cfid = cfid;
+			spin_unlock(&cfids->cfid_list_lock);
+			return 0;
+		}
+	}
+	spin_unlock(&cfids->cfid_list_lock);
+	return -ENOENT;
+}
+
+static void
+smb2_close_cached_fid(struct kref *ref)
+{
+	struct cached_fid *cfid = container_of(ref, struct cached_fid,
+					       refcount);
+
+	spin_lock(&cfid->cfids->cfid_list_lock);
+	if (cfid->on_list) {
+		list_del(&cfid->entry);
+		cfid->on_list = false;
+		cfid->cfids->num_entries--;
+	}
+	spin_unlock(&cfid->cfids->cfid_list_lock);
+
+	dput(cfid->dentry);
+	cfid->dentry = NULL;
+
+	if (cfid->is_open) {
+		SMB2_close(0, cfid->tcon, cfid->fid.persistent_fid,
+			   cfid->fid.volatile_fid);
+		atomic_dec(&cfid->tcon->num_remote_opens);
+	}
+
+	free_cached_dir(cfid);
+}
+
+void drop_cached_dir_by_name(const unsigned int xid, struct cifs_tcon *tcon,
+			     const char *name, struct cifs_sb_info *cifs_sb)
+{
+	struct cached_fid *cfid = NULL;
+	int rc;
+
+	rc = open_cached_dir(xid, tcon, name, cifs_sb, true, &cfid);
+	if (rc) {
+		cifs_dbg(FYI, "no cached dir found for rmdir(%s)\n", name);
+		return;
+	}
+	spin_lock(&cfid->cfids->cfid_list_lock);
+	if (cfid->has_lease) {
+		cfid->has_lease = false;
+		kref_put(&cfid->refcount, smb2_close_cached_fid);
+	}
+	spin_unlock(&cfid->cfids->cfid_list_lock);
+	close_cached_dir(cfid);
+}
+
+
+void close_cached_dir(struct cached_fid *cfid)
+{
+	kref_put(&cfid->refcount, smb2_close_cached_fid);
+}
+
+/*
+ * Called from cifs_kill_sb when we unmount a share
+ */
+void close_all_cached_dirs(struct cifs_sb_info *cifs_sb)
+{
+	struct rb_root *root = &cifs_sb->tlink_tree;
+	struct rb_node *node;
+	struct cached_fid *cfid;
+	struct cifs_tcon *tcon;
+	struct tcon_link *tlink;
+	struct cached_fids *cfids;
+
+	for (node = rb_first(root); node; node = rb_next(node)) {
+		tlink = rb_entry(node, struct tcon_link, tl_rbnode);
+		tcon = tlink_tcon(tlink);
+		if (IS_ERR(tcon))
+			continue;
+		cfids = tcon->cfids;
+		if (cfids == NULL)
+			continue;
+		list_for_each_entry(cfid, &cfids->entries, entry) {
+			dput(cfid->dentry);
+			cfid->dentry = NULL;
+		}
+	}
+}
+
+/*
+ * Invalidate all cached dirs when a TCON has been reset
+ * due to a session loss.
+ */
+void invalidate_all_cached_dirs(struct cifs_tcon *tcon)
+{
+	struct cached_fids *cfids = tcon->cfids;
+	struct cached_fid *cfid, *q;
+	LIST_HEAD(entry);
+
+	if (cfids == NULL)
+		return;
+
+	spin_lock(&cfids->cfid_list_lock);
+	list_for_each_entry_safe(cfid, q, &cfids->entries, entry) {
+		list_move(&cfid->entry, &entry);
+		cfids->num_entries--;
+		cfid->is_open = false;
+		cfid->on_list = false;
+		/* To prevent race with smb2_cached_lease_break() */
+		kref_get(&cfid->refcount);
+	}
+	spin_unlock(&cfids->cfid_list_lock);
+
+	list_for_each_entry_safe(cfid, q, &entry, entry) {
+		list_del(&cfid->entry);
+		cancel_work_sync(&cfid->lease_break);
+		if (cfid->has_lease) {
+			/*
+			 * We lease was never cancelled from the server so we
+			 * need to drop the reference.
+			 */
+			spin_lock(&cfids->cfid_list_lock);
+			cfid->has_lease = false;
+			spin_unlock(&cfids->cfid_list_lock);
+			kref_put(&cfid->refcount, smb2_close_cached_fid);
+		}
+		/* Drop the extra reference opened above*/
+		kref_put(&cfid->refcount, smb2_close_cached_fid);
+	}
+}
+
+static void
+smb2_cached_lease_break(struct work_struct *work)
+{
+	struct cached_fid *cfid = container_of(work,
+				struct cached_fid, lease_break);
+
+	spin_lock(&cfid->cfids->cfid_list_lock);
+	cfid->has_lease = false;
+	spin_unlock(&cfid->cfids->cfid_list_lock);
+	kref_put(&cfid->refcount, smb2_close_cached_fid);
+}
+
+int cached_dir_lease_break(struct cifs_tcon *tcon, __u8 lease_key[16])
+{
+	struct cached_fids *cfids = tcon->cfids;
+	struct cached_fid *cfid;
+
+	if (cfids == NULL)
+		return false;
+
+	spin_lock(&cfids->cfid_list_lock);
+	list_for_each_entry(cfid, &cfids->entries, entry) {
+		if (cfid->has_lease &&
+		    !memcmp(lease_key,
+			    cfid->fid.lease_key,
+			    SMB2_LEASE_KEY_SIZE)) {
+			cfid->time = 0;
+			/*
+			 * We found a lease remove it from the list
+			 * so no threads can access it.
+			 */
+			list_del(&cfid->entry);
+			cfid->on_list = false;
+			cfids->num_entries--;
+
+			queue_work(cifsiod_wq,
+				   &cfid->lease_break);
+			spin_unlock(&cfids->cfid_list_lock);
+			return true;
+		}
+	}
+	spin_unlock(&cfids->cfid_list_lock);
+	return false;
+}
+
+static struct cached_fid *init_cached_dir(const char *path)
+{
+	struct cached_fid *cfid;
+
+	cfid = kzalloc(sizeof(*cfid), GFP_ATOMIC);
+	if (!cfid)
+		return NULL;
+	cfid->path = kstrdup(path, GFP_ATOMIC);
+	if (!cfid->path) {
+		kfree(cfid);
+		return NULL;
+	}
+
+	INIT_WORK(&cfid->lease_break, smb2_cached_lease_break);
+	INIT_LIST_HEAD(&cfid->entry);
+	INIT_LIST_HEAD(&cfid->dirents.entries);
+	mutex_init(&cfid->dirents.de_mutex);
+	spin_lock_init(&cfid->fid_lock);
+	kref_init(&cfid->refcount);
+	return cfid;
+}
+
+static void free_cached_dir(struct cached_fid *cfid)
+{
+	struct cached_dirent *dirent, *q;
+
+	dput(cfid->dentry);
+	cfid->dentry = NULL;
+
+	/*
+	 * Delete all cached dirent names
+	 */
+	list_for_each_entry_safe(dirent, q, &cfid->dirents.entries, entry) {
+		list_del(&dirent->entry);
+		kfree(dirent->name);
+		kfree(dirent);
+	}
+
+	kfree(cfid->path);
+	cfid->path = NULL;
+	kfree(cfid);
+}
+
+static void cfids_laundromat_worker(struct work_struct *work)
+{
+	struct cached_fids *cfids;
+	struct cached_fid *cfid, *q;
+	LIST_HEAD(entry);
+
+	cfids = container_of(work, struct cached_fids, laundromat_work.work);
+
+	spin_lock(&cfids->cfid_list_lock);
+	list_for_each_entry_safe(cfid, q, &cfids->entries, entry) {
+		if (cfid->time &&
+		    time_after(jiffies, cfid->time + HZ * dir_cache_timeout)) {
+			cfid->on_list = false;
+			list_move(&cfid->entry, &entry);
+			cfids->num_entries--;
+			/* To prevent race with smb2_cached_lease_break() */
+			kref_get(&cfid->refcount);
+		}
+	}
+	spin_unlock(&cfids->cfid_list_lock);
+
+	list_for_each_entry_safe(cfid, q, &entry, entry) {
+		list_del(&cfid->entry);
+		/*
+		 * Cancel and wait for the work to finish in case we are racing
+		 * with it.
+		 */
+		cancel_work_sync(&cfid->lease_break);
+		if (cfid->has_lease) {
+			/*
+			 * Our lease has not yet been cancelled from the server
+			 * so we need to drop the reference.
+			 */
+			spin_lock(&cfids->cfid_list_lock);
+			cfid->has_lease = false;
+			spin_unlock(&cfids->cfid_list_lock);
+			kref_put(&cfid->refcount, smb2_close_cached_fid);
+		}
+		/* Drop the extra reference opened above */
+		kref_put(&cfid->refcount, smb2_close_cached_fid);
+	}
+	queue_delayed_work(cifsiod_wq, &cfids->laundromat_work,
+			   dir_cache_timeout * HZ);
+}
+
+struct cached_fids *init_cached_dirs(void)
+{
+	struct cached_fids *cfids;
+
+	cfids = kzalloc(sizeof(*cfids), GFP_KERNEL);
+	if (!cfids)
+		return NULL;
+	spin_lock_init(&cfids->cfid_list_lock);
+	INIT_LIST_HEAD(&cfids->entries);
+
+	INIT_DELAYED_WORK(&cfids->laundromat_work, cfids_laundromat_worker);
+	queue_delayed_work(cifsiod_wq, &cfids->laundromat_work,
+			   dir_cache_timeout * HZ);
+
+	return cfids;
+}
+
+/*
+ * Called from tconInfoFree when we are tearing down the tcon.
+ * There are no active users or open files/directories at this point.
+ */
+void free_cached_dirs(struct cached_fids *cfids)
+{
+	struct cached_fid *cfid, *q;
+	LIST_HEAD(entry);
+
+	if (cfids == NULL)
+		return;
+
+	cancel_delayed_work_sync(&cfids->laundromat_work);
+
+	spin_lock(&cfids->cfid_list_lock);
+	list_for_each_entry_safe(cfid, q, &cfids->entries, entry) {
+		cfid->on_list = false;
+		cfid->is_open = false;
+		list_move(&cfid->entry, &entry);
+	}
+	spin_unlock(&cfids->cfid_list_lock);
+
+	list_for_each_entry_safe(cfid, q, &entry, entry) {
+		list_del(&cfid->entry);
+		free_cached_dir(cfid);
+	}
+
+	kfree(cfids);
+}
diff --git a/fs/smb/client/cached_dir.h b/fs/smb/client/cached_dir.h
new file mode 100644
index 0000000000..81ba0fd5cc
--- /dev/null
+++ b/fs/smb/client/cached_dir.h
@@ -0,0 +1,81 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ *  Functions to handle the cached directory entries
+ *
+ *  Copyright (c) 2022, Ronnie Sahlberg <lsahlber@redhat.com>
+ */
+
+#ifndef _CACHED_DIR_H
+#define _CACHED_DIR_H
+
+
+struct cached_dirent {
+	struct list_head entry;
+	char *name;
+	int namelen;
+	loff_t pos;
+
+	struct cifs_fattr fattr;
+};
+
+struct cached_dirents {
+	bool is_valid:1;
+	bool is_failed:1;
+	struct dir_context *ctx; /*
+				  * Only used to make sure we only take entries
+				  * from a single context. Never dereferenced.
+				  */
+	struct mutex de_mutex;
+	int pos;		 /* Expected ctx->pos */
+	struct list_head entries;
+};
+
+struct cached_fid {
+	struct list_head entry;
+	struct cached_fids *cfids;
+	const char *path;
+	bool has_lease:1;
+	bool is_open:1;
+	bool on_list:1;
+	bool file_all_info_is_valid:1;
+	unsigned long time; /* jiffies of when lease was taken */
+	struct kref refcount;
+	struct cifs_fid fid;
+	spinlock_t fid_lock;
+	struct cifs_tcon *tcon;
+	struct dentry *dentry;
+	struct work_struct lease_break;
+	struct smb2_file_all_info file_all_info;
+	struct cached_dirents dirents;
+};
+
+/* default MAX_CACHED_FIDS is 16 */
+struct cached_fids {
+	/* Must be held when:
+	 * - accessing the cfids->entries list
+	 */
+	spinlock_t cfid_list_lock;
+	int num_entries;
+	struct list_head entries;
+	struct delayed_work laundromat_work;
+};
+
+extern struct cached_fids *init_cached_dirs(void);
+extern void free_cached_dirs(struct cached_fids *cfids);
+extern int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
+			   const char *path,
+			   struct cifs_sb_info *cifs_sb,
+			   bool lookup_only, struct cached_fid **cfid);
+extern int open_cached_dir_by_dentry(struct cifs_tcon *tcon,
+				     struct dentry *dentry,
+				     struct cached_fid **cfid);
+extern void close_cached_dir(struct cached_fid *cfid);
+extern void drop_cached_dir_by_name(const unsigned int xid,
+				    struct cifs_tcon *tcon,
+				    const char *name,
+				    struct cifs_sb_info *cifs_sb);
+extern void close_all_cached_dirs(struct cifs_sb_info *cifs_sb);
+extern void invalidate_all_cached_dirs(struct cifs_tcon *tcon);
+extern int cached_dir_lease_break(struct cifs_tcon *tcon, __u8 lease_key[16]);
+
+#endif			/* _CACHED_DIR_H */
diff --git a/fs/smb/client/cifs_debug.c b/fs/smb/client/cifs_debug.c
new file mode 100644
index 0000000000..3230ed7ead
--- /dev/null
+++ b/fs/smb/client/cifs_debug.c
@@ -0,0 +1,1179 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *
+ *   Copyright (C) International Business Machines  Corp., 2000,2005
+ *
+ *   Modified by Steve French (sfrench@us.ibm.com)
+ */
+#include <linux/fs.h>
+#include <linux/string.h>
+#include <linux/ctype.h>
+#include <linux/kstrtox.h>
+#include <linux/module.h>
+#include <linux/proc_fs.h>
+#include <linux/uaccess.h>
+#include <uapi/linux/ethtool.h>
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifsfs.h"
+#include "fs_context.h"
+#ifdef CONFIG_CIFS_DFS_UPCALL
+#include "dfs_cache.h"
+#endif
+#ifdef CONFIG_CIFS_SMB_DIRECT
+#include "smbdirect.h"
+#endif
+#include "cifs_swn.h"
+
+void
+cifs_dump_mem(char *label, void *data, int length)
+{
+	pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
+	print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
+		       data, length, true);
+}
+
+void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
+{
+#ifdef CONFIG_CIFS_DEBUG2
+	struct smb_hdr *smb = buf;
+
+	cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d Wct: %d\n",
+		 smb->Command, smb->Status.CifsError, smb->Flags,
+		 smb->Flags2, smb->Mid, smb->Pid, smb->WordCount);
+	if (!server->ops->check_message(buf, server->total_read, server)) {
+		cifs_dbg(VFS, "smb buf %p len %u\n", smb,
+			 server->ops->calc_smb_size(smb));
+	}
+#endif /* CONFIG_CIFS_DEBUG2 */
+}
+
+void cifs_dump_mids(struct TCP_Server_Info *server)
+{
+#ifdef CONFIG_CIFS_DEBUG2
+	struct mid_q_entry *mid_entry;
+
+	if (server == NULL)
+		return;
+
+	cifs_dbg(VFS, "Dump pending requests:\n");
+	spin_lock(&server->mid_lock);
+	list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
+		cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
+			 mid_entry->mid_state,
+			 le16_to_cpu(mid_entry->command),
+			 mid_entry->pid,
+			 mid_entry->callback_data,
+			 mid_entry->mid);
+#ifdef CONFIG_CIFS_STATS2
+		cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
+			 mid_entry->large_buf,
+			 mid_entry->resp_buf,
+			 mid_entry->when_received,
+			 jiffies);
+#endif /* STATS2 */
+		cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
+			 mid_entry->multiRsp, mid_entry->multiEnd);
+		if (mid_entry->resp_buf) {
+			cifs_dump_detail(mid_entry->resp_buf, server);
+			cifs_dump_mem("existing buf: ",
+				mid_entry->resp_buf, 62);
+		}
+	}
+	spin_unlock(&server->mid_lock);
+#endif /* CONFIG_CIFS_DEBUG2 */
+}
+
+#ifdef CONFIG_PROC_FS
+static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
+{
+	__u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
+
+	seq_printf(m, "%s Mounts: %d ", tcon->tree_name, tcon->tc_count);
+	if (tcon->nativeFileSystem)
+		seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
+	seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
+		   le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
+		   le32_to_cpu(tcon->fsAttrInfo.Attributes),
+		   le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
+		   tcon->status);
+	if (dev_type == FILE_DEVICE_DISK)
+		seq_puts(m, " type: DISK ");
+	else if (dev_type == FILE_DEVICE_CD_ROM)
+		seq_puts(m, " type: CDROM ");
+	else
+		seq_printf(m, " type: %d ", dev_type);
+
+	seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
+
+	if ((tcon->seal) ||
+	    (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
+	    (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
+		seq_puts(m, " encrypted");
+	if (tcon->nocase)
+		seq_printf(m, " nocase");
+	if (tcon->unix_ext)
+		seq_printf(m, " POSIX Extensions");
+	if (tcon->ses->server->ops->dump_share_caps)
+		tcon->ses->server->ops->dump_share_caps(m, tcon);
+	if (tcon->use_witness)
+		seq_puts(m, " Witness");
+	if (tcon->broken_sparse_sup)
+		seq_puts(m, " nosparse");
+	if (tcon->need_reconnect)
+		seq_puts(m, "\tDISCONNECTED ");
+	spin_lock(&tcon->tc_lock);
+	if (tcon->origin_fullpath) {
+		seq_printf(m, "\n\tDFS origin fullpath: %s",
+			   tcon->origin_fullpath);
+	}
+	spin_unlock(&tcon->tc_lock);
+	seq_putc(m, '\n');
+}
+
+static void
+cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan)
+{
+	struct TCP_Server_Info *server = chan->server;
+
+	if (!server) {
+		seq_printf(m, "\n\n\t\tChannel: %d DISABLED", i+1);
+		return;
+	}
+
+	seq_printf(m, "\n\n\t\tChannel: %d ConnectionId: 0x%llx"
+		   "\n\t\tNumber of credits: %d,%d,%d Dialect 0x%x"
+		   "\n\t\tTCP status: %d Instance: %d"
+		   "\n\t\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d"
+		   "\n\t\tIn Send: %d In MaxReq Wait: %d",
+		   i+1, server->conn_id,
+		   server->credits,
+		   server->echo_credits,
+		   server->oplock_credits,
+		   server->dialect,
+		   server->tcpStatus,
+		   server->reconnect_instance,
+		   server->srv_count,
+		   server->sec_mode,
+		   in_flight(server),
+		   atomic_read(&server->in_send),
+		   atomic_read(&server->num_waiters));
+#ifdef CONFIG_NET_NS
+	if (server->net)
+		seq_printf(m, " Net namespace: %u ", server->net->ns.inum);
+#endif /* NET_NS */
+
+}
+
+static inline const char *smb_speed_to_str(size_t bps)
+{
+	size_t mbps = bps / 1000 / 1000;
+
+	switch (mbps) {
+	case SPEED_10:
+		return "10Mbps";
+	case SPEED_100:
+		return "100Mbps";
+	case SPEED_1000:
+		return "1Gbps";
+	case SPEED_2500:
+		return "2.5Gbps";
+	case SPEED_5000:
+		return "5Gbps";
+	case SPEED_10000:
+		return "10Gbps";
+	case SPEED_14000:
+		return "14Gbps";
+	case SPEED_20000:
+		return "20Gbps";
+	case SPEED_25000:
+		return "25Gbps";
+	case SPEED_40000:
+		return "40Gbps";
+	case SPEED_50000:
+		return "50Gbps";
+	case SPEED_56000:
+		return "56Gbps";
+	case SPEED_100000:
+		return "100Gbps";
+	case SPEED_200000:
+		return "200Gbps";
+	case SPEED_400000:
+		return "400Gbps";
+	case SPEED_800000:
+		return "800Gbps";
+	default:
+		return "Unknown";
+	}
+}
+
+static void
+cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
+{
+	struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
+	struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
+
+	seq_printf(m, "\tSpeed: %s\n", smb_speed_to_str(iface->speed));
+	seq_puts(m, "\t\tCapabilities: ");
+	if (iface->rdma_capable)
+		seq_puts(m, "rdma ");
+	if (iface->rss_capable)
+		seq_puts(m, "rss ");
+	if (!iface->rdma_capable && !iface->rss_capable)
+		seq_puts(m, "None");
+	seq_putc(m, '\n');
+	if (iface->sockaddr.ss_family == AF_INET)
+		seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
+	else if (iface->sockaddr.ss_family == AF_INET6)
+		seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
+	if (!iface->is_active)
+		seq_puts(m, "\t\t[for-cleanup]\n");
+}
+
+static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
+{
+	struct TCP_Server_Info *server;
+	struct cifs_ses *ses;
+	struct cifs_tcon *tcon;
+	struct cifsFileInfo *cfile;
+
+	seq_puts(m, "# Version:1\n");
+	seq_puts(m, "# Format:\n");
+	seq_puts(m, "# <tree id> <ses id> <persistent fid> <flags> <count> <pid> <uid>");
+#ifdef CONFIG_CIFS_DEBUG2
+	seq_printf(m, " <filename> <mid>\n");
+#else
+	seq_printf(m, " <filename>\n");
+#endif /* CIFS_DEBUG2 */
+	spin_lock(&cifs_tcp_ses_lock);
+	list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
+		list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
+			list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
+				spin_lock(&tcon->open_file_lock);
+				list_for_each_entry(cfile, &tcon->openFileList, tlist) {
+					seq_printf(m,
+						"0x%x 0x%llx 0x%llx 0x%x %d %d %d %pd",
+						tcon->tid,
+						ses->Suid,
+						cfile->fid.persistent_fid,
+						cfile->f_flags,
+						cfile->count,
+						cfile->pid,
+						from_kuid(&init_user_ns, cfile->uid),
+						cfile->dentry);
+#ifdef CONFIG_CIFS_DEBUG2
+					seq_printf(m, " %llu\n", cfile->fid.mid);
+#else
+					seq_printf(m, "\n");
+#endif /* CIFS_DEBUG2 */
+				}
+				spin_unlock(&tcon->open_file_lock);
+			}
+		}
+	}
+	spin_unlock(&cifs_tcp_ses_lock);
+	seq_putc(m, '\n');
+	return 0;
+}
+
+static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
+{
+	struct mid_q_entry *mid_entry;
+	struct TCP_Server_Info *server;
+	struct TCP_Server_Info *chan_server;
+	struct cifs_ses *ses;
+	struct cifs_tcon *tcon;
+	struct cifs_server_iface *iface;
+	size_t iface_weight = 0, iface_min_speed = 0;
+	struct cifs_server_iface *last_iface = NULL;
+	int c, i, j;
+
+	seq_puts(m,
+		    "Display Internal CIFS Data Structures for Debugging\n"
+		    "---------------------------------------------------\n");
+	seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
+	seq_printf(m, "Features:");
+#ifdef CONFIG_CIFS_DFS_UPCALL
+	seq_printf(m, " DFS");
+#endif
+#ifdef CONFIG_CIFS_FSCACHE
+	seq_printf(m, ",FSCACHE");
+#endif
+#ifdef CONFIG_CIFS_SMB_DIRECT
+	seq_printf(m, ",SMB_DIRECT");
+#endif
+#ifdef CONFIG_CIFS_STATS2
+	seq_printf(m, ",STATS2");
+#else
+	seq_printf(m, ",STATS");
+#endif
+#ifdef CONFIG_CIFS_DEBUG2
+	seq_printf(m, ",DEBUG2");
+#elif defined(CONFIG_CIFS_DEBUG)
+	seq_printf(m, ",DEBUG");
+#endif
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	seq_printf(m, ",ALLOW_INSECURE_LEGACY");
+#endif
+#ifdef CONFIG_CIFS_POSIX
+	seq_printf(m, ",CIFS_POSIX");
+#endif
+#ifdef CONFIG_CIFS_UPCALL
+	seq_printf(m, ",UPCALL(SPNEGO)");
+#endif
+#ifdef CONFIG_CIFS_XATTR
+	seq_printf(m, ",XATTR");
+#endif
+	seq_printf(m, ",ACL");
+#ifdef CONFIG_CIFS_SWN_UPCALL
+	seq_puts(m, ",WITNESS");
+#endif
+	seq_putc(m, '\n');
+	seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
+	seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
+
+	seq_printf(m, "\nServers: ");
+
+	c = 0;
+	spin_lock(&cifs_tcp_ses_lock);
+	list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
+		/* channel info will be printed as a part of sessions below */
+		if (SERVER_IS_CHAN(server))
+			continue;
+
+		c++;
+		seq_printf(m, "\n%d) ConnectionId: 0x%llx ",
+			c, server->conn_id);
+
+		spin_lock(&server->srv_lock);
+		if (server->hostname)
+			seq_printf(m, "Hostname: %s ", server->hostname);
+		seq_printf(m, "\nClientGUID: %pUL", server->client_guid);
+		spin_unlock(&server->srv_lock);
+#ifdef CONFIG_CIFS_SMB_DIRECT
+		if (!server->rdma)
+			goto skip_rdma;
+
+		if (!server->smbd_conn) {
+			seq_printf(m, "\nSMBDirect transport not available");
+			goto skip_rdma;
+		}
+
+		seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
+			"transport status: %x",
+			server->smbd_conn->protocol,
+			server->smbd_conn->transport_status);
+		seq_printf(m, "\nConn receive_credit_max: %x "
+			"send_credit_target: %x max_send_size: %x",
+			server->smbd_conn->receive_credit_max,
+			server->smbd_conn->send_credit_target,
+			server->smbd_conn->max_send_size);
+		seq_printf(m, "\nConn max_fragmented_recv_size: %x "
+			"max_fragmented_send_size: %x max_receive_size:%x",
+			server->smbd_conn->max_fragmented_recv_size,
+			server->smbd_conn->max_fragmented_send_size,
+			server->smbd_conn->max_receive_size);
+		seq_printf(m, "\nConn keep_alive_interval: %x "
+			"max_readwrite_size: %x rdma_readwrite_threshold: %x",
+			server->smbd_conn->keep_alive_interval,
+			server->smbd_conn->max_readwrite_size,
+			server->smbd_conn->rdma_readwrite_threshold);
+		seq_printf(m, "\nDebug count_get_receive_buffer: %x "
+			"count_put_receive_buffer: %x count_send_empty: %x",
+			server->smbd_conn->count_get_receive_buffer,
+			server->smbd_conn->count_put_receive_buffer,
+			server->smbd_conn->count_send_empty);
+		seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
+			"count_enqueue_reassembly_queue: %x "
+			"count_dequeue_reassembly_queue: %x "
+			"fragment_reassembly_remaining: %x "
+			"reassembly_data_length: %x "
+			"reassembly_queue_length: %x",
+			server->smbd_conn->count_reassembly_queue,
+			server->smbd_conn->count_enqueue_reassembly_queue,
+			server->smbd_conn->count_dequeue_reassembly_queue,
+			server->smbd_conn->fragment_reassembly_remaining,
+			server->smbd_conn->reassembly_data_length,
+			server->smbd_conn->reassembly_queue_length);
+		seq_printf(m, "\nCurrent Credits send_credits: %x "
+			"receive_credits: %x receive_credit_target: %x",
+			atomic_read(&server->smbd_conn->send_credits),
+			atomic_read(&server->smbd_conn->receive_credits),
+			server->smbd_conn->receive_credit_target);
+		seq_printf(m, "\nPending send_pending: %x ",
+			atomic_read(&server->smbd_conn->send_pending));
+		seq_printf(m, "\nReceive buffers count_receive_queue: %x "
+			"count_empty_packet_queue: %x",
+			server->smbd_conn->count_receive_queue,
+			server->smbd_conn->count_empty_packet_queue);
+		seq_printf(m, "\nMR responder_resources: %x "
+			"max_frmr_depth: %x mr_type: %x",
+			server->smbd_conn->responder_resources,
+			server->smbd_conn->max_frmr_depth,
+			server->smbd_conn->mr_type);
+		seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
+			atomic_read(&server->smbd_conn->mr_ready_count),
+			atomic_read(&server->smbd_conn->mr_used_count));
+skip_rdma:
+#endif
+		seq_printf(m, "\nNumber of credits: %d,%d,%d Dialect 0x%x",
+			server->credits,
+			server->echo_credits,
+			server->oplock_credits,
+			server->dialect);
+		if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
+			seq_printf(m, " COMPRESS_LZNT1");
+		else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
+			seq_printf(m, " COMPRESS_LZ77");
+		else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
+			seq_printf(m, " COMPRESS_LZ77_HUFF");
+		if (server->sign)
+			seq_printf(m, " signed");
+		if (server->posix_ext_supported)
+			seq_printf(m, " posix");
+		if (server->nosharesock)
+			seq_printf(m, " nosharesock");
+
+		if (server->rdma)
+			seq_printf(m, "\nRDMA ");
+		seq_printf(m, "\nTCP status: %d Instance: %d"
+				"\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
+				server->tcpStatus,
+				server->reconnect_instance,
+				server->srv_count,
+				server->sec_mode, in_flight(server));
+#ifdef CONFIG_NET_NS
+		if (server->net)
+			seq_printf(m, " Net namespace: %u ", server->net->ns.inum);
+#endif /* NET_NS */
+
+		seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d",
+				atomic_read(&server->in_send),
+				atomic_read(&server->num_waiters));
+
+		if (server->leaf_fullpath) {
+			seq_printf(m, "\nDFS leaf full path: %s",
+				   server->leaf_fullpath);
+		}
+
+		seq_printf(m, "\n\n\tSessions: ");
+		i = 0;
+		list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
+			spin_lock(&ses->ses_lock);
+			if (ses->ses_status == SES_EXITING) {
+				spin_unlock(&ses->ses_lock);
+				continue;
+			}
+			i++;
+			if ((ses->serverDomain == NULL) ||
+				(ses->serverOS == NULL) ||
+				(ses->serverNOS == NULL)) {
+				seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
+					i, ses->ip_addr, ses->ses_count,
+					ses->capabilities, ses->ses_status);
+				if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
+					seq_printf(m, "Guest ");
+				else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
+					seq_printf(m, "Anonymous ");
+			} else {
+				seq_printf(m,
+				    "\n\t%d) Name: %s  Domain: %s Uses: %d OS: %s "
+				    "\n\tNOS: %s\tCapability: 0x%x"
+					"\n\tSMB session status: %d ",
+				i, ses->ip_addr, ses->serverDomain,
+				ses->ses_count, ses->serverOS, ses->serverNOS,
+				ses->capabilities, ses->ses_status);
+			}
+			spin_unlock(&ses->ses_lock);
+
+			seq_printf(m, "\n\tSecurity type: %s ",
+				get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
+
+			/* dump session id helpful for use with network trace */
+			seq_printf(m, " SessionId: 0x%llx", ses->Suid);
+			if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
+				seq_puts(m, " encrypted");
+				/* can help in debugging to show encryption type */
+				if (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)
+					seq_puts(m, "(gcm256)");
+			}
+			if (ses->sign)
+				seq_puts(m, " signed");
+
+			seq_printf(m, "\n\tUser: %d Cred User: %d",
+				   from_kuid(&init_user_ns, ses->linux_uid),
+				   from_kuid(&init_user_ns, ses->cred_uid));
+
+			if (ses->dfs_root_ses) {
+				seq_printf(m, "\n\tDFS root session id: 0x%llx",
+					   ses->dfs_root_ses->Suid);
+			}
+
+			spin_lock(&ses->chan_lock);
+			if (CIFS_CHAN_NEEDS_RECONNECT(ses, 0))
+				seq_puts(m, "\tPrimary channel: DISCONNECTED ");
+			if (CIFS_CHAN_IN_RECONNECT(ses, 0))
+				seq_puts(m, "\t[RECONNECTING] ");
+
+			if (ses->chan_count > 1) {
+				seq_printf(m, "\n\n\tExtra Channels: %zu ",
+					   ses->chan_count-1);
+				for (j = 1; j < ses->chan_count; j++) {
+					cifs_dump_channel(m, j, &ses->chans[j]);
+					if (CIFS_CHAN_NEEDS_RECONNECT(ses, j))
+						seq_puts(m, "\tDISCONNECTED ");
+					if (CIFS_CHAN_IN_RECONNECT(ses, j))
+						seq_puts(m, "\t[RECONNECTING] ");
+				}
+			}
+			spin_unlock(&ses->chan_lock);
+
+			seq_puts(m, "\n\n\tShares: ");
+			j = 0;
+
+			seq_printf(m, "\n\t%d) IPC: ", j);
+			if (ses->tcon_ipc)
+				cifs_debug_tcon(m, ses->tcon_ipc);
+			else
+				seq_puts(m, "none\n");
+
+			list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
+				++j;
+				seq_printf(m, "\n\t%d) ", j);
+				cifs_debug_tcon(m, tcon);
+			}
+
+			spin_lock(&ses->iface_lock);
+			if (ses->iface_count)
+				seq_printf(m, "\n\n\tServer interfaces: %zu"
+					   "\tLast updated: %lu seconds ago",
+					   ses->iface_count,
+					   (jiffies - ses->iface_last_update) / HZ);
+
+			last_iface = list_last_entry(&ses->iface_list,
+						     struct cifs_server_iface,
+						     iface_head);
+			iface_min_speed = last_iface->speed;
+
+			j = 0;
+			list_for_each_entry(iface, &ses->iface_list,
+						 iface_head) {
+				seq_printf(m, "\n\t%d)", ++j);
+				cifs_dump_iface(m, iface);
+
+				iface_weight = iface->speed / iface_min_speed;
+				seq_printf(m, "\t\tWeight (cur,total): (%zu,%zu)"
+					   "\n\t\tAllocated channels: %u\n",
+					   iface->weight_fulfilled,
+					   iface_weight,
+					   iface->num_channels);
+
+				if (is_ses_using_iface(ses, iface))
+					seq_puts(m, "\t\t[CONNECTED]\n");
+			}
+			spin_unlock(&ses->iface_lock);
+
+			seq_puts(m, "\n\n\tMIDs: ");
+			spin_lock(&ses->chan_lock);
+			for (j = 0; j < ses->chan_count; j++) {
+				chan_server = ses->chans[j].server;
+				if (!chan_server)
+					continue;
+
+				if (list_empty(&chan_server->pending_mid_q))
+					continue;
+
+				seq_printf(m, "\n\tServer ConnectionId: 0x%llx",
+					   chan_server->conn_id);
+				spin_lock(&chan_server->mid_lock);
+				list_for_each_entry(mid_entry, &chan_server->pending_mid_q, qhead) {
+					seq_printf(m, "\n\t\tState: %d com: %d pid: %d cbdata: %p mid %llu",
+						   mid_entry->mid_state,
+						   le16_to_cpu(mid_entry->command),
+						   mid_entry->pid,
+						   mid_entry->callback_data,
+						   mid_entry->mid);
+				}
+				spin_unlock(&chan_server->mid_lock);
+			}
+			spin_unlock(&ses->chan_lock);
+			seq_puts(m, "\n--\n");
+		}
+		if (i == 0)
+			seq_printf(m, "\n\t\t[NONE]");
+	}
+	if (c == 0)
+		seq_printf(m, "\n\t[NONE]");
+
+	spin_unlock(&cifs_tcp_ses_lock);
+	seq_putc(m, '\n');
+	cifs_swn_dump(m);
+
+	/* BB add code to dump additional info such as TCP session info now */
+	return 0;
+}
+
+static ssize_t cifs_stats_proc_write(struct file *file,
+		const char __user *buffer, size_t count, loff_t *ppos)
+{
+	bool bv;
+	int rc;
+	struct TCP_Server_Info *server;
+	struct cifs_ses *ses;
+	struct cifs_tcon *tcon;
+
+	rc = kstrtobool_from_user(buffer, count, &bv);
+	if (rc == 0) {
+#ifdef CONFIG_CIFS_STATS2
+		int i;
+
+		atomic_set(&total_buf_alloc_count, 0);
+		atomic_set(&total_small_buf_alloc_count, 0);
+#endif /* CONFIG_CIFS_STATS2 */
+		atomic_set(&tcpSesReconnectCount, 0);
+		atomic_set(&tconInfoReconnectCount, 0);
+
+		spin_lock(&GlobalMid_Lock);
+		GlobalMaxActiveXid = 0;
+		GlobalCurrentXid = 0;
+		spin_unlock(&GlobalMid_Lock);
+		spin_lock(&cifs_tcp_ses_lock);
+		list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
+			server->max_in_flight = 0;
+#ifdef CONFIG_CIFS_STATS2
+			for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
+				atomic_set(&server->num_cmds[i], 0);
+				atomic_set(&server->smb2slowcmd[i], 0);
+				server->time_per_cmd[i] = 0;
+				server->slowest_cmd[i] = 0;
+				server->fastest_cmd[0] = 0;
+			}
+#endif /* CONFIG_CIFS_STATS2 */
+			list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
+				list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
+					atomic_set(&tcon->num_smbs_sent, 0);
+					spin_lock(&tcon->stat_lock);
+					tcon->bytes_read = 0;
+					tcon->bytes_written = 0;
+					spin_unlock(&tcon->stat_lock);
+					if (server->ops->clear_stats)
+						server->ops->clear_stats(tcon);
+				}
+			}
+		}
+		spin_unlock(&cifs_tcp_ses_lock);
+	} else {
+		return rc;
+	}
+
+	return count;
+}
+
+static int cifs_stats_proc_show(struct seq_file *m, void *v)
+{
+	int i;
+#ifdef CONFIG_CIFS_STATS2
+	int j;
+#endif /* STATS2 */
+	struct TCP_Server_Info *server;
+	struct cifs_ses *ses;
+	struct cifs_tcon *tcon;
+
+	seq_printf(m, "Resources in use\nCIFS Session: %d\n",
+			sesInfoAllocCount.counter);
+	seq_printf(m, "Share (unique mount targets): %d\n",
+			tconInfoAllocCount.counter);
+	seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
+			buf_alloc_count.counter,
+			cifs_min_rcv + tcpSesAllocCount.counter);
+	seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
+			small_buf_alloc_count.counter, cifs_min_small);
+#ifdef CONFIG_CIFS_STATS2
+	seq_printf(m, "Total Large %d Small %d Allocations\n",
+				atomic_read(&total_buf_alloc_count),
+				atomic_read(&total_small_buf_alloc_count));
+#endif /* CONFIG_CIFS_STATS2 */
+
+	seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&mid_count));
+	seq_printf(m,
+		"\n%d session %d share reconnects\n",
+		tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
+
+	seq_printf(m,
+		"Total vfs operations: %d maximum at one time: %d\n",
+		GlobalCurrentXid, GlobalMaxActiveXid);
+
+	i = 0;
+	spin_lock(&cifs_tcp_ses_lock);
+	list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
+		seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
+#ifdef CONFIG_CIFS_STATS2
+		seq_puts(m, "\nTotal time spent processing by command. Time ");
+		seq_printf(m, "units are jiffies (%d per second)\n", HZ);
+		seq_puts(m, "  SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
+		seq_puts(m, "  --------\t------\t----------\t-------\t-------\n");
+		for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
+			seq_printf(m, "  %d\t\t%d\t%llu\t\t%u\t%u\n", j,
+				atomic_read(&server->num_cmds[j]),
+				server->time_per_cmd[j],
+				server->fastest_cmd[j],
+				server->slowest_cmd[j]);
+		for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
+			if (atomic_read(&server->smb2slowcmd[j])) {
+				spin_lock(&server->srv_lock);
+				seq_printf(m, "  %d slow responses from %s for command %d\n",
+					atomic_read(&server->smb2slowcmd[j]),
+					server->hostname, j);
+				spin_unlock(&server->srv_lock);
+			}
+#endif /* STATS2 */
+		list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
+			list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
+				i++;
+				seq_printf(m, "\n%d) %s", i, tcon->tree_name);
+				if (tcon->need_reconnect)
+					seq_puts(m, "\tDISCONNECTED ");
+				seq_printf(m, "\nSMBs: %d",
+					   atomic_read(&tcon->num_smbs_sent));
+				if (server->ops->print_stats)
+					server->ops->print_stats(m, tcon);
+			}
+		}
+	}
+	spin_unlock(&cifs_tcp_ses_lock);
+
+	seq_putc(m, '\n');
+	return 0;
+}
+
+static int cifs_stats_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, cifs_stats_proc_show, NULL);
+}
+
+static const struct proc_ops cifs_stats_proc_ops = {
+	.proc_open	= cifs_stats_proc_open,
+	.proc_read	= seq_read,
+	.proc_lseek	= seq_lseek,
+	.proc_release	= single_release,
+	.proc_write	= cifs_stats_proc_write,
+};
+
+#ifdef CONFIG_CIFS_SMB_DIRECT
+#define PROC_FILE_DEFINE(name) \
+static ssize_t name##_write(struct file *file, const char __user *buffer, \
+	size_t count, loff_t *ppos) \
+{ \
+	int rc; \
+	rc = kstrtoint_from_user(buffer, count, 10, & name); \
+	if (rc) \
+		return rc; \
+	return count; \
+} \
+static int name##_proc_show(struct seq_file *m, void *v) \
+{ \
+	seq_printf(m, "%d\n", name ); \
+	return 0; \
+} \
+static int name##_open(struct inode *inode, struct file *file) \
+{ \
+	return single_open(file, name##_proc_show, NULL); \
+} \
+\
+static const struct proc_ops cifs_##name##_proc_fops = { \
+	.proc_open	= name##_open, \
+	.proc_read	= seq_read, \
+	.proc_lseek	= seq_lseek, \
+	.proc_release	= single_release, \
+	.proc_write	= name##_write, \
+}
+
+PROC_FILE_DEFINE(rdma_readwrite_threshold);
+PROC_FILE_DEFINE(smbd_max_frmr_depth);
+PROC_FILE_DEFINE(smbd_keep_alive_interval);
+PROC_FILE_DEFINE(smbd_max_receive_size);
+PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
+PROC_FILE_DEFINE(smbd_max_send_size);
+PROC_FILE_DEFINE(smbd_send_credit_target);
+PROC_FILE_DEFINE(smbd_receive_credit_max);
+#endif
+
+static struct proc_dir_entry *proc_fs_cifs;
+static const struct proc_ops cifsFYI_proc_ops;
+static const struct proc_ops cifs_lookup_cache_proc_ops;
+static const struct proc_ops traceSMB_proc_ops;
+static const struct proc_ops cifs_security_flags_proc_ops;
+static const struct proc_ops cifs_linux_ext_proc_ops;
+static const struct proc_ops cifs_mount_params_proc_ops;
+
+void
+cifs_proc_init(void)
+{
+	proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
+	if (proc_fs_cifs == NULL)
+		return;
+
+	proc_create_single("DebugData", 0, proc_fs_cifs,
+			cifs_debug_data_proc_show);
+
+	proc_create_single("open_files", 0400, proc_fs_cifs,
+			cifs_debug_files_proc_show);
+
+	proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops);
+	proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops);
+	proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops);
+	proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
+		    &cifs_linux_ext_proc_ops);
+	proc_create("SecurityFlags", 0644, proc_fs_cifs,
+		    &cifs_security_flags_proc_ops);
+	proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
+		    &cifs_lookup_cache_proc_ops);
+
+	proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops);
+
+#ifdef CONFIG_CIFS_DFS_UPCALL
+	proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops);
+#endif
+
+#ifdef CONFIG_CIFS_SMB_DIRECT
+	proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
+		&cifs_rdma_readwrite_threshold_proc_fops);
+	proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
+		&cifs_smbd_max_frmr_depth_proc_fops);
+	proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
+		&cifs_smbd_keep_alive_interval_proc_fops);
+	proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
+		&cifs_smbd_max_receive_size_proc_fops);
+	proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
+		&cifs_smbd_max_fragmented_recv_size_proc_fops);
+	proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
+		&cifs_smbd_max_send_size_proc_fops);
+	proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
+		&cifs_smbd_send_credit_target_proc_fops);
+	proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
+		&cifs_smbd_receive_credit_max_proc_fops);
+#endif
+}
+
+void
+cifs_proc_clean(void)
+{
+	if (proc_fs_cifs == NULL)
+		return;
+
+	remove_proc_entry("DebugData", proc_fs_cifs);
+	remove_proc_entry("open_files", proc_fs_cifs);
+	remove_proc_entry("cifsFYI", proc_fs_cifs);
+	remove_proc_entry("traceSMB", proc_fs_cifs);
+	remove_proc_entry("Stats", proc_fs_cifs);
+	remove_proc_entry("SecurityFlags", proc_fs_cifs);
+	remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
+	remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
+	remove_proc_entry("mount_params", proc_fs_cifs);
+
+#ifdef CONFIG_CIFS_DFS_UPCALL
+	remove_proc_entry("dfscache", proc_fs_cifs);
+#endif
+#ifdef CONFIG_CIFS_SMB_DIRECT
+	remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
+	remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
+	remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
+	remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
+	remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
+	remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
+	remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
+	remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
+#endif
+	remove_proc_entry("fs/cifs", NULL);
+}
+
+static int cifsFYI_proc_show(struct seq_file *m, void *v)
+{
+	seq_printf(m, "%d\n", cifsFYI);
+	return 0;
+}
+
+static int cifsFYI_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, cifsFYI_proc_show, NULL);
+}
+
+static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
+		size_t count, loff_t *ppos)
+{
+	char c[2] = { '\0' };
+	bool bv;
+	int rc;
+
+	rc = get_user(c[0], buffer);
+	if (rc)
+		return rc;
+	if (kstrtobool(c, &bv) == 0)
+		cifsFYI = bv;
+	else if ((c[0] > '1') && (c[0] <= '9'))
+		cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
+	else
+		return -EINVAL;
+
+	return count;
+}
+
+static const struct proc_ops cifsFYI_proc_ops = {
+	.proc_open	= cifsFYI_proc_open,
+	.proc_read	= seq_read,
+	.proc_lseek	= seq_lseek,
+	.proc_release	= single_release,
+	.proc_write	= cifsFYI_proc_write,
+};
+
+static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
+{
+	seq_printf(m, "%d\n", linuxExtEnabled);
+	return 0;
+}
+
+static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, cifs_linux_ext_proc_show, NULL);
+}
+
+static ssize_t cifs_linux_ext_proc_write(struct file *file,
+		const char __user *buffer, size_t count, loff_t *ppos)
+{
+	int rc;
+
+	rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
+	if (rc)
+		return rc;
+
+	return count;
+}
+
+static const struct proc_ops cifs_linux_ext_proc_ops = {
+	.proc_open	= cifs_linux_ext_proc_open,
+	.proc_read	= seq_read,
+	.proc_lseek	= seq_lseek,
+	.proc_release	= single_release,
+	.proc_write	= cifs_linux_ext_proc_write,
+};
+
+static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
+{
+	seq_printf(m, "%d\n", lookupCacheEnabled);
+	return 0;
+}
+
+static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, cifs_lookup_cache_proc_show, NULL);
+}
+
+static ssize_t cifs_lookup_cache_proc_write(struct file *file,
+		const char __user *buffer, size_t count, loff_t *ppos)
+{
+	int rc;
+
+	rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
+	if (rc)
+		return rc;
+
+	return count;
+}
+
+static const struct proc_ops cifs_lookup_cache_proc_ops = {
+	.proc_open	= cifs_lookup_cache_proc_open,
+	.proc_read	= seq_read,
+	.proc_lseek	= seq_lseek,
+	.proc_release	= single_release,
+	.proc_write	= cifs_lookup_cache_proc_write,
+};
+
+static int traceSMB_proc_show(struct seq_file *m, void *v)
+{
+	seq_printf(m, "%d\n", traceSMB);
+	return 0;
+}
+
+static int traceSMB_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, traceSMB_proc_show, NULL);
+}
+
+static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
+		size_t count, loff_t *ppos)
+{
+	int rc;
+
+	rc = kstrtobool_from_user(buffer, count, &traceSMB);
+	if (rc)
+		return rc;
+
+	return count;
+}
+
+static const struct proc_ops traceSMB_proc_ops = {
+	.proc_open	= traceSMB_proc_open,
+	.proc_read	= seq_read,
+	.proc_lseek	= seq_lseek,
+	.proc_release	= single_release,
+	.proc_write	= traceSMB_proc_write,
+};
+
+static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
+{
+	seq_printf(m, "0x%x\n", global_secflags);
+	return 0;
+}
+
+static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, cifs_security_flags_proc_show, NULL);
+}
+
+/*
+ * Ensure that if someone sets a MUST flag, that we disable all other MAY
+ * flags except for the ones corresponding to the given MUST flag. If there are
+ * multiple MUST flags, then try to prefer more secure ones.
+ */
+static void
+cifs_security_flags_handle_must_flags(unsigned int *flags)
+{
+	unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
+
+	if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
+		*flags = CIFSSEC_MUST_KRB5;
+	else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
+		*flags = CIFSSEC_MUST_NTLMSSP;
+	else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
+		*flags = CIFSSEC_MUST_NTLMV2;
+
+	*flags |= signflags;
+}
+
+static ssize_t cifs_security_flags_proc_write(struct file *file,
+		const char __user *buffer, size_t count, loff_t *ppos)
+{
+	int rc;
+	unsigned int flags;
+	char flags_string[12];
+	bool bv;
+
+	if ((count < 1) || (count > 11))
+		return -EINVAL;
+
+	memset(flags_string, 0, 12);
+
+	if (copy_from_user(flags_string, buffer, count))
+		return -EFAULT;
+
+	if (count < 3) {
+		/* single char or single char followed by null */
+		if (kstrtobool(flags_string, &bv) == 0) {
+			global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
+			return count;
+		} else if (!isdigit(flags_string[0])) {
+			cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
+					flags_string);
+			return -EINVAL;
+		}
+	}
+
+	/* else we have a number */
+	rc = kstrtouint(flags_string, 0, &flags);
+	if (rc) {
+		cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
+				flags_string);
+		return rc;
+	}
+
+	cifs_dbg(FYI, "sec flags 0x%x\n", flags);
+
+	if (flags == 0)  {
+		cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
+		return -EINVAL;
+	}
+
+	if (flags & ~CIFSSEC_MASK) {
+		cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
+			 flags & ~CIFSSEC_MASK);
+		return -EINVAL;
+	}
+
+	cifs_security_flags_handle_must_flags(&flags);
+
+	/* flags look ok - update the global security flags for cifs module */
+	global_secflags = flags;
+	if (global_secflags & CIFSSEC_MUST_SIGN) {
+		/* requiring signing implies signing is allowed */
+		global_secflags |= CIFSSEC_MAY_SIGN;
+		cifs_dbg(FYI, "packet signing now required\n");
+	} else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
+		cifs_dbg(FYI, "packet signing disabled\n");
+	}
+	/* BB should we turn on MAY flags for other MUST options? */
+	return count;
+}
+
+static const struct proc_ops cifs_security_flags_proc_ops = {
+	.proc_open	= cifs_security_flags_proc_open,
+	.proc_read	= seq_read,
+	.proc_lseek	= seq_lseek,
+	.proc_release	= single_release,
+	.proc_write	= cifs_security_flags_proc_write,
+};
+
+/* To make it easier to debug, can help to show mount params */
+static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
+{
+	const struct fs_parameter_spec *p;
+	const char *type;
+
+	for (p = smb3_fs_parameters; p->name; p++) {
+		/* cannot use switch with pointers... */
+		if (!p->type) {
+			if (p->flags == fs_param_neg_with_no)
+				type = "noflag";
+			else
+				type = "flag";
+		} else if (p->type == fs_param_is_bool)
+			type = "bool";
+		else if (p->type == fs_param_is_u32)
+			type = "u32";
+		else if (p->type == fs_param_is_u64)
+			type = "u64";
+		else if (p->type == fs_param_is_string)
+			type = "string";
+		else
+			type = "unknown";
+
+		seq_printf(m, "%s:%s\n", p->name, type);
+	}
+
+	return 0;
+}
+
+static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, cifs_mount_params_proc_show, NULL);
+}
+
+static const struct proc_ops cifs_mount_params_proc_ops = {
+	.proc_open	= cifs_mount_params_proc_open,
+	.proc_read	= seq_read,
+	.proc_lseek	= seq_lseek,
+	.proc_release	= single_release,
+	/* No need for write for now */
+	/* .proc_write	= cifs_mount_params_proc_write, */
+};
+
+#else
+inline void cifs_proc_init(void)
+{
+}
+
+inline void cifs_proc_clean(void)
+{
+}
+#endif /* PROC_FS */
diff --git a/fs/smb/client/cifs_debug.h b/fs/smb/client/cifs_debug.h
new file mode 100644
index 0000000000..ce5cfd236f
--- /dev/null
+++ b/fs/smb/client/cifs_debug.h
@@ -0,0 +1,160 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ *
+ *   Copyright (c) International Business Machines  Corp., 2000,2002
+ *   Modified by Steve French (sfrench@us.ibm.com)
+ */
+
+#ifndef _H_CIFS_DEBUG
+#define _H_CIFS_DEBUG
+
+#ifdef pr_fmt
+#undef pr_fmt
+#endif
+
+#define pr_fmt(fmt) "CIFS: " fmt
+
+void cifs_dump_mem(char *label, void *data, int length);
+void cifs_dump_detail(void *buf, struct TCP_Server_Info *ptcp_info);
+void cifs_dump_mids(struct TCP_Server_Info *);
+extern bool traceSMB;		/* flag which enables the function below */
+void dump_smb(void *, int);
+#define CIFS_INFO	0x01
+#define CIFS_RC		0x02
+#define CIFS_TIMER	0x04
+
+#define VFS 1
+#define FYI 2
+extern int cifsFYI;
+#ifdef CONFIG_CIFS_DEBUG2
+#define NOISY 4
+#else
+#define NOISY 0
+#endif
+#define ONCE 8
+
+/*
+ *	debug ON
+ *	--------
+ */
+#ifdef CONFIG_CIFS_DEBUG
+
+
+/*
+ * When adding tracepoints and debug messages we have various choices.
+ * Some considerations:
+ *
+ * Use cifs_dbg(VFS, ...) for things we always want logged, and the user to see
+ *     cifs_info(...) slightly less important, admin can filter via loglevel > 6
+ *     cifs_dbg(FYI, ...) minor debugging messages, off by default
+ *     trace_smb3_*  ftrace functions are preferred for complex debug messages
+ *                 intended for developers or experienced admins, off by default
+ */
+
+/* Information level messages, minor events */
+#define cifs_info_func(ratefunc, fmt, ...)				\
+	pr_info_ ## ratefunc(fmt, ##__VA_ARGS__)
+
+#define cifs_info(fmt, ...)						\
+	cifs_info_func(ratelimited, fmt, ##__VA_ARGS__)
+
+/* information message: e.g., configuration, major event */
+#define cifs_dbg_func(ratefunc, type, fmt, ...)				\
+do {									\
+	if ((type) & FYI && cifsFYI & CIFS_INFO) {			\
+		pr_debug_ ## ratefunc("%s: " fmt,			\
+				      __FILE__, ##__VA_ARGS__);		\
+	} else if ((type) & VFS) {					\
+		pr_err_ ## ratefunc("VFS: " fmt, ##__VA_ARGS__);	\
+	} else if ((type) & NOISY && (NOISY != 0)) {			\
+		pr_debug_ ## ratefunc(fmt, ##__VA_ARGS__);		\
+	}								\
+} while (0)
+
+#define cifs_dbg(type, fmt, ...)					\
+do {									\
+	if ((type) & ONCE)						\
+		cifs_dbg_func(once, type, fmt, ##__VA_ARGS__);		\
+	else								\
+		cifs_dbg_func(ratelimited, type, fmt, ##__VA_ARGS__);	\
+} while (0)
+
+#define cifs_server_dbg_func(ratefunc, type, fmt, ...)			\
+do {									\
+	spin_lock(&server->srv_lock);					\
+	if ((type) & FYI && cifsFYI & CIFS_INFO) {			\
+		pr_debug_ ## ratefunc("%s: \\\\%s " fmt,		\
+				      __FILE__, server->hostname,	\
+				      ##__VA_ARGS__);			\
+	} else if ((type) & VFS) {					\
+		pr_err_ ## ratefunc("VFS: \\\\%s " fmt,			\
+				    server->hostname, ##__VA_ARGS__);	\
+	} else if ((type) & NOISY && (NOISY != 0)) {			\
+		pr_debug_ ## ratefunc("\\\\%s " fmt,			\
+				      server->hostname, ##__VA_ARGS__);	\
+	}								\
+	spin_unlock(&server->srv_lock);					\
+} while (0)
+
+#define cifs_server_dbg(type, fmt, ...)					\
+do {									\
+	if ((type) & ONCE)						\
+		cifs_server_dbg_func(once, type, fmt, ##__VA_ARGS__);	\
+	else								\
+		cifs_server_dbg_func(ratelimited, type, fmt,		\
+				     ##__VA_ARGS__);			\
+} while (0)
+
+#define cifs_tcon_dbg_func(ratefunc, type, fmt, ...)			\
+do {									\
+	const char *tn = "";						\
+	if (tcon && tcon->tree_name)					\
+		tn = tcon->tree_name;					\
+	if ((type) & FYI && cifsFYI & CIFS_INFO) {			\
+		pr_debug_ ## ratefunc("%s: %s "	fmt,			\
+				      __FILE__, tn, ##__VA_ARGS__);	\
+	} else if ((type) & VFS) {					\
+		pr_err_ ## ratefunc("VFS: %s " fmt, tn, ##__VA_ARGS__);	\
+	} else if ((type) & NOISY && (NOISY != 0)) {			\
+		pr_debug_ ## ratefunc("%s " fmt, tn, ##__VA_ARGS__);	\
+	}								\
+} while (0)
+
+#define cifs_tcon_dbg(type, fmt, ...)					\
+do {									\
+	if ((type) & ONCE)						\
+		cifs_tcon_dbg_func(once, type, fmt, ##__VA_ARGS__);	\
+	else								\
+		cifs_tcon_dbg_func(ratelimited, type, fmt,		\
+				   ##__VA_ARGS__);			\
+} while (0)
+
+/*
+ *	debug OFF
+ *	---------
+ */
+#else		/* _CIFS_DEBUG */
+#define cifs_dbg(type, fmt, ...)					\
+do {									\
+	if (0)								\
+		pr_debug(fmt, ##__VA_ARGS__);				\
+} while (0)
+
+#define cifs_server_dbg(type, fmt, ...)					\
+do {									\
+	if (0)								\
+		pr_debug("\\\\%s " fmt,					\
+			 server->hostname, ##__VA_ARGS__);		\
+} while (0)
+
+#define cifs_tcon_dbg(type, fmt, ...)					\
+do {									\
+	if (0)								\
+		pr_debug("%s " fmt, tcon->tree_name, ##__VA_ARGS__);	\
+} while (0)
+
+#define cifs_info(fmt, ...)						\
+	pr_info(fmt, ##__VA_ARGS__)
+#endif
+
+#endif				/* _H_CIFS_DEBUG */
diff --git a/fs/smb/client/cifs_fs_sb.h b/fs/smb/client/cifs_fs_sb.h
new file mode 100644
index 0000000000..6517591922
--- /dev/null
+++ b/fs/smb/client/cifs_fs_sb.h
@@ -0,0 +1,74 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+/*
+ *
+ *   Copyright (c) International Business Machines  Corp., 2002,2004
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ */
+#include <linux/rbtree.h>
+
+#ifndef _CIFS_FS_SB_H
+#define _CIFS_FS_SB_H
+
+#include <linux/backing-dev.h>
+
+#define CIFS_MOUNT_NO_PERM      1 /* do not do client vfs_perm check */
+#define CIFS_MOUNT_SET_UID      2 /* set current's euid in create etc. */
+#define CIFS_MOUNT_SERVER_INUM  4 /* inode numbers from uniqueid from server  */
+#define CIFS_MOUNT_DIRECT_IO    8 /* do not write nor read through page cache */
+#define CIFS_MOUNT_NO_XATTR     0x10  /* if set - disable xattr support       */
+#define CIFS_MOUNT_MAP_SPECIAL_CHR 0x20 /* remap illegal chars in filenames   */
+#define CIFS_MOUNT_POSIX_PATHS  0x40  /* Negotiate posix pathnames if possible*/
+#define CIFS_MOUNT_UNX_EMUL     0x80  /* Network compat with SFUnix emulation */
+#define CIFS_MOUNT_NO_BRL       0x100 /* No sending byte range locks to srv   */
+#define CIFS_MOUNT_CIFS_ACL     0x200 /* send ACL requests to non-POSIX srv   */
+#define CIFS_MOUNT_OVERR_UID    0x400 /* override uid returned from server    */
+#define CIFS_MOUNT_OVERR_GID    0x800 /* override gid returned from server    */
+#define CIFS_MOUNT_DYNPERM      0x1000 /* allow in-memory only mode setting   */
+#define CIFS_MOUNT_NOPOSIXBRL   0x2000 /* mandatory not posix byte range lock */
+#define CIFS_MOUNT_NOSSYNC      0x4000 /* don't do slow SMBflush on every sync*/
+#define CIFS_MOUNT_FSCACHE	0x8000 /* local caching enabled */
+#define CIFS_MOUNT_MF_SYMLINKS	0x10000 /* Minshall+French Symlinks enabled */
+#define CIFS_MOUNT_MULTIUSER	0x20000 /* multiuser mount */
+#define CIFS_MOUNT_STRICT_IO	0x40000 /* strict cache mode */
+#define CIFS_MOUNT_RWPIDFORWARD	0x80000 /* use pid forwarding for rw */
+#define CIFS_MOUNT_POSIXACL	0x100000 /* mirror of SB_POSIXACL in mnt_cifs_flags */
+#define CIFS_MOUNT_CIFS_BACKUPUID 0x200000 /* backup intent bit for a user */
+#define CIFS_MOUNT_CIFS_BACKUPGID 0x400000 /* backup intent bit for a group */
+#define CIFS_MOUNT_MAP_SFM_CHR	0x800000 /* SFM/MAC mapping for illegal chars */
+#define CIFS_MOUNT_USE_PREFIX_PATH 0x1000000 /* make subpath with unaccessible
+					      * root mountable
+					      */
+#define CIFS_MOUNT_UID_FROM_ACL 0x2000000 /* try to get UID via special SID */
+#define CIFS_MOUNT_NO_HANDLE_CACHE 0x4000000 /* disable caching dir handles */
+#define CIFS_MOUNT_NO_DFS 0x8000000 /* disable DFS resolving */
+#define CIFS_MOUNT_MODE_FROM_SID 0x10000000 /* retrieve mode from special ACE */
+#define CIFS_MOUNT_RO_CACHE	0x20000000  /* assumes share will not change */
+#define CIFS_MOUNT_RW_CACHE	0x40000000  /* assumes only client accessing */
+#define CIFS_MOUNT_SHUTDOWN	0x80000000
+
+struct cifs_sb_info {
+	struct rb_root tlink_tree;
+	spinlock_t tlink_tree_lock;
+	struct tcon_link *master_tlink;
+	struct nls_table *local_nls;
+	struct smb3_fs_context *ctx;
+	atomic_t active;
+	unsigned int mnt_cifs_flags;
+	struct delayed_work prune_tlinks;
+	struct rcu_head rcu;
+
+	/* only used when CIFS_MOUNT_USE_PREFIX_PATH is set */
+	char *prepath;
+
+	/*
+	 * Indicate whether serverino option was turned off later
+	 * (cifs_autodisable_serverino) in order to match new mounts.
+	 */
+	bool mnt_cifs_serverino_autodisabled;
+	/*
+	 * Available once the mount has completed.
+	 */
+	struct dentry *root;
+};
+#endif				/* _CIFS_FS_SB_H */
diff --git a/fs/smb/client/cifs_ioctl.h b/fs/smb/client/cifs_ioctl.h
new file mode 100644
index 0000000000..26327442e3
--- /dev/null
+++ b/fs/smb/client/cifs_ioctl.h
@@ -0,0 +1,132 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+/*
+ *
+ *   Structure definitions for io control for cifs/smb3
+ *
+ *   Copyright (c) 2015 Steve French <steve.french@primarydata.com>
+ *
+ */
+
+struct smb_mnt_fs_info {
+	__u32	version; /* 0001 */
+	__u16	protocol_id;
+	__u16	tcon_flags;
+	__u32	vol_serial_number;
+	__u32	vol_create_time;
+	__u32	share_caps;
+	__u32	share_flags;
+	__u32	sector_flags;
+	__u32	optimal_sector_size;
+	__u32	max_bytes_chunk;
+	__u32	fs_attributes;
+	__u32	max_path_component;
+	__u32	device_type;
+	__u32	device_characteristics;
+	__u32	maximal_access;
+	__u64   cifs_posix_caps;
+} __packed;
+
+struct smb_mnt_tcon_info {
+	__u32	tid;
+	__u64	session_id;
+} __packed;
+
+struct smb_snapshot_array {
+	__u32	number_of_snapshots;
+	__u32	number_of_snapshots_returned;
+	__u32	snapshot_array_size;
+	/*	snapshots[]; */
+} __packed;
+
+/* query_info flags */
+#define PASSTHRU_QUERY_INFO	0x00000000
+#define PASSTHRU_FSCTL		0x00000001
+#define PASSTHRU_SET_INFO	0x00000002
+struct smb_query_info {
+	__u32   info_type;
+	__u32   file_info_class;
+	__u32   additional_information;
+	__u32   flags;
+	__u32	input_buffer_length;
+	__u32	output_buffer_length;
+	/* char buffer[]; */
+} __packed;
+
+/*
+ * Dumping the commonly used 16 byte (e.g. CCM and GCM128) keys still supported
+ * for backlevel compatibility, but is not sufficient for dumping the less
+ * frequently used GCM256 (32 byte) keys (see the newer "CIFS_DUMP_FULL_KEY"
+ * ioctl for dumping decryption info for GCM256 mounts)
+ */
+struct smb3_key_debug_info {
+	__u64	Suid;
+	__u16	cipher_type;
+	__u8	auth_key[16]; /* SMB2_NTLMV2_SESSKEY_SIZE */
+	__u8	smb3encryptionkey[SMB3_SIGN_KEY_SIZE];
+	__u8	smb3decryptionkey[SMB3_SIGN_KEY_SIZE];
+} __packed;
+
+/*
+ * Dump variable-sized keys
+ */
+struct smb3_full_key_debug_info {
+	/* INPUT: size of userspace buffer */
+	__u32   in_size;
+
+	/*
+	 * INPUT: 0 for current user, otherwise session to dump
+	 * OUTPUT: session id that was dumped
+	 */
+	__u64	session_id;
+	__u16	cipher_type;
+	__u8    session_key_length;
+	__u8    server_in_key_length;
+	__u8    server_out_key_length;
+	__u8    data[];
+	/*
+	 * return this struct with the keys appended at the end:
+	 * __u8 session_key[session_key_length];
+	 * __u8 server_in_key[server_in_key_length];
+	 * __u8 server_out_key[server_out_key_length];
+	 */
+} __packed;
+
+struct smb3_notify {
+	__u32	completion_filter;
+	bool	watch_tree;
+} __packed;
+
+struct smb3_notify_info {
+	__u32	completion_filter;
+	bool	watch_tree;
+	__u32   data_len; /* size of notify data below */
+	__u8	notify_data[];
+} __packed;
+
+#define CIFS_IOCTL_MAGIC	0xCF
+#define CIFS_IOC_COPYCHUNK_FILE	_IOW(CIFS_IOCTL_MAGIC, 3, int)
+#define CIFS_IOC_SET_INTEGRITY  _IO(CIFS_IOCTL_MAGIC, 4)
+#define CIFS_IOC_GET_MNT_INFO _IOR(CIFS_IOCTL_MAGIC, 5, struct smb_mnt_fs_info)
+#define CIFS_ENUMERATE_SNAPSHOTS _IOR(CIFS_IOCTL_MAGIC, 6, struct smb_snapshot_array)
+#define CIFS_QUERY_INFO _IOWR(CIFS_IOCTL_MAGIC, 7, struct smb_query_info)
+#define CIFS_DUMP_KEY _IOWR(CIFS_IOCTL_MAGIC, 8, struct smb3_key_debug_info)
+#define CIFS_IOC_NOTIFY _IOW(CIFS_IOCTL_MAGIC, 9, struct smb3_notify)
+#define CIFS_DUMP_FULL_KEY _IOWR(CIFS_IOCTL_MAGIC, 10, struct smb3_full_key_debug_info)
+#define CIFS_IOC_NOTIFY_INFO _IOWR(CIFS_IOCTL_MAGIC, 11, struct smb3_notify_info)
+#define CIFS_IOC_GET_TCON_INFO _IOR(CIFS_IOCTL_MAGIC, 12, struct smb_mnt_tcon_info)
+#define CIFS_IOC_SHUTDOWN _IOR('X', 125, __u32)
+
+/*
+ * Flags for going down operation
+ */
+#define CIFS_GOING_FLAGS_DEFAULT                0x0     /* going down */
+#define CIFS_GOING_FLAGS_LOGFLUSH               0x1     /* flush log but not data */
+#define CIFS_GOING_FLAGS_NOLOGFLUSH             0x2     /* don't flush log nor data */
+
+static inline bool cifs_forced_shutdown(struct cifs_sb_info *sbi)
+{
+	if (CIFS_MOUNT_SHUTDOWN & sbi->mnt_cifs_flags)
+		return true;
+	else
+		return false;
+}
diff --git a/fs/smb/client/cifs_spnego.c b/fs/smb/client/cifs_spnego.c
new file mode 100644
index 0000000000..af7849e597
--- /dev/null
+++ b/fs/smb/client/cifs_spnego.c
@@ -0,0 +1,236 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *   SPNEGO upcall management for CIFS
+ *
+ *   Copyright (c) 2007 Red Hat, Inc.
+ *   Author(s): Jeff Layton (jlayton@redhat.com)
+ *
+ */
+
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <keys/user-type.h>
+#include <linux/key-type.h>
+#include <linux/keyctl.h>
+#include <linux/inet.h>
+#include "cifsglob.h"
+#include "cifs_spnego.h"
+#include "cifs_debug.h"
+#include "cifsproto.h"
+static const struct cred *spnego_cred;
+
+/* create a new cifs key */
+static int
+cifs_spnego_key_instantiate(struct key *key, struct key_preparsed_payload *prep)
+{
+	char *payload;
+	int ret;
+
+	ret = -ENOMEM;
+	payload = kmemdup(prep->data, prep->datalen, GFP_KERNEL);
+	if (!payload)
+		goto error;
+
+	/* attach the data */
+	key->payload.data[0] = payload;
+	ret = 0;
+
+error:
+	return ret;
+}
+
+static void
+cifs_spnego_key_destroy(struct key *key)
+{
+	kfree(key->payload.data[0]);
+}
+
+
+/*
+ * keytype for CIFS spnego keys
+ */
+struct key_type cifs_spnego_key_type = {
+	.name		= "cifs.spnego",
+	.instantiate	= cifs_spnego_key_instantiate,
+	.destroy	= cifs_spnego_key_destroy,
+	.describe	= user_describe,
+};
+
+/* length of longest version string e.g.  strlen("ver=0xFF") */
+#define MAX_VER_STR_LEN		8
+
+/* length of longest security mechanism name, eg in future could have
+ * strlen(";sec=ntlmsspi") */
+#define MAX_MECH_STR_LEN	13
+
+/* strlen of ";host=" */
+#define HOST_KEY_LEN		6
+
+/* strlen of ";ip4=" or ";ip6=" */
+#define IP_KEY_LEN		5
+
+/* strlen of ";uid=0x" */
+#define UID_KEY_LEN		7
+
+/* strlen of ";creduid=0x" */
+#define CREDUID_KEY_LEN		11
+
+/* strlen of ";user=" */
+#define USER_KEY_LEN		6
+
+/* strlen of ";pid=0x" */
+#define PID_KEY_LEN		7
+
+/* get a key struct with a SPNEGO security blob, suitable for session setup */
+struct key *
+cifs_get_spnego_key(struct cifs_ses *sesInfo,
+		    struct TCP_Server_Info *server)
+{
+	struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
+	struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
+	char *description, *dp;
+	size_t desc_len;
+	struct key *spnego_key;
+	const char *hostname = server->hostname;
+	const struct cred *saved_cred;
+
+	/* length of fields (with semicolons): ver=0xyz ip4=ipaddress
+	   host=hostname sec=mechanism uid=0xFF user=username */
+	desc_len = MAX_VER_STR_LEN +
+		   HOST_KEY_LEN + strlen(hostname) +
+		   IP_KEY_LEN + INET6_ADDRSTRLEN +
+		   MAX_MECH_STR_LEN +
+		   UID_KEY_LEN + (sizeof(uid_t) * 2) +
+		   CREDUID_KEY_LEN + (sizeof(uid_t) * 2) +
+		   PID_KEY_LEN + (sizeof(pid_t) * 2) + 1;
+
+	if (sesInfo->user_name)
+		desc_len += USER_KEY_LEN + strlen(sesInfo->user_name);
+
+	spnego_key = ERR_PTR(-ENOMEM);
+	description = kzalloc(desc_len, GFP_KERNEL);
+	if (description == NULL)
+		goto out;
+
+	dp = description;
+	/* start with version and hostname portion of UNC string */
+	spnego_key = ERR_PTR(-EINVAL);
+	sprintf(dp, "ver=0x%x;host=%s;", CIFS_SPNEGO_UPCALL_VERSION,
+		hostname);
+	dp = description + strlen(description);
+
+	/* add the server address */
+	if (server->dstaddr.ss_family == AF_INET)
+		sprintf(dp, "ip4=%pI4", &sa->sin_addr);
+	else if (server->dstaddr.ss_family == AF_INET6)
+		sprintf(dp, "ip6=%pI6", &sa6->sin6_addr);
+	else
+		goto out;
+
+	dp = description + strlen(description);
+
+	/* for now, only sec=krb5 and sec=mskrb5 are valid */
+	if (server->sec_kerberos)
+		sprintf(dp, ";sec=krb5");
+	else if (server->sec_mskerberos)
+		sprintf(dp, ";sec=mskrb5");
+	else {
+		cifs_dbg(VFS, "unknown or missing server auth type, use krb5\n");
+		sprintf(dp, ";sec=krb5");
+	}
+
+	dp = description + strlen(description);
+	sprintf(dp, ";uid=0x%x",
+		from_kuid_munged(&init_user_ns, sesInfo->linux_uid));
+
+	dp = description + strlen(description);
+	sprintf(dp, ";creduid=0x%x",
+		from_kuid_munged(&init_user_ns, sesInfo->cred_uid));
+
+	if (sesInfo->user_name) {
+		dp = description + strlen(description);
+		sprintf(dp, ";user=%s", sesInfo->user_name);
+	}
+
+	dp = description + strlen(description);
+	sprintf(dp, ";pid=0x%x", current->pid);
+
+	cifs_dbg(FYI, "key description = %s\n", description);
+	saved_cred = override_creds(spnego_cred);
+	spnego_key = request_key(&cifs_spnego_key_type, description, "");
+	revert_creds(saved_cred);
+
+#ifdef CONFIG_CIFS_DEBUG2
+	if (cifsFYI && !IS_ERR(spnego_key)) {
+		struct cifs_spnego_msg *msg = spnego_key->payload.data[0];
+		cifs_dump_mem("SPNEGO reply blob:", msg->data, min(1024U,
+				msg->secblob_len + msg->sesskey_len));
+	}
+#endif /* CONFIG_CIFS_DEBUG2 */
+
+out:
+	kfree(description);
+	return spnego_key;
+}
+
+int
+init_cifs_spnego(void)
+{
+	struct cred *cred;
+	struct key *keyring;
+	int ret;
+
+	cifs_dbg(FYI, "Registering the %s key type\n",
+		 cifs_spnego_key_type.name);
+
+	/*
+	 * Create an override credential set with special thread keyring for
+	 * spnego upcalls.
+	 */
+
+	cred = prepare_kernel_cred(&init_task);
+	if (!cred)
+		return -ENOMEM;
+
+	keyring = keyring_alloc(".cifs_spnego",
+				GLOBAL_ROOT_UID, GLOBAL_ROOT_GID, cred,
+				(KEY_POS_ALL & ~KEY_POS_SETATTR) |
+				KEY_USR_VIEW | KEY_USR_READ,
+				KEY_ALLOC_NOT_IN_QUOTA, NULL, NULL);
+	if (IS_ERR(keyring)) {
+		ret = PTR_ERR(keyring);
+		goto failed_put_cred;
+	}
+
+	ret = register_key_type(&cifs_spnego_key_type);
+	if (ret < 0)
+		goto failed_put_key;
+
+	/*
+	 * instruct request_key() to use this special keyring as a cache for
+	 * the results it looks up
+	 */
+	set_bit(KEY_FLAG_ROOT_CAN_CLEAR, &keyring->flags);
+	cred->thread_keyring = keyring;
+	cred->jit_keyring = KEY_REQKEY_DEFL_THREAD_KEYRING;
+	spnego_cred = cred;
+
+	cifs_dbg(FYI, "cifs spnego keyring: %d\n", key_serial(keyring));
+	return 0;
+
+failed_put_key:
+	key_put(keyring);
+failed_put_cred:
+	put_cred(cred);
+	return ret;
+}
+
+void
+exit_cifs_spnego(void)
+{
+	key_revoke(spnego_cred->thread_keyring);
+	unregister_key_type(&cifs_spnego_key_type);
+	put_cred(spnego_cred);
+	cifs_dbg(FYI, "Unregistered %s key type\n", cifs_spnego_key_type.name);
+}
diff --git a/fs/smb/client/cifs_spnego.h b/fs/smb/client/cifs_spnego.h
new file mode 100644
index 0000000000..e4d751b0c8
--- /dev/null
+++ b/fs/smb/client/cifs_spnego.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+/*
+ *   SPNEGO upcall management for CIFS
+ *
+ *   Copyright (c) 2007 Red Hat, Inc.
+ *   Author(s): Jeff Layton (jlayton@redhat.com)
+ *              Steve French (sfrench@us.ibm.com)
+ *
+ */
+
+#ifndef _CIFS_SPNEGO_H
+#define _CIFS_SPNEGO_H
+
+#define CIFS_SPNEGO_UPCALL_VERSION 2
+
+/*
+ * The version field should always be set to CIFS_SPNEGO_UPCALL_VERSION.
+ * The flags field is for future use. The request-key callout should set
+ * sesskey_len and secblob_len, and then concatenate the SessKey+SecBlob
+ * and stuff it in the data field.
+ */
+struct cifs_spnego_msg {
+	uint32_t	version;
+	uint32_t	flags;
+	uint32_t	sesskey_len;
+	uint32_t	secblob_len;
+	uint8_t		data[];
+};
+
+#ifdef __KERNEL__
+extern struct key_type cifs_spnego_key_type;
+extern struct key *cifs_get_spnego_key(struct cifs_ses *sesInfo,
+				       struct TCP_Server_Info *server);
+#endif /* KERNEL */
+
+#endif /* _CIFS_SPNEGO_H */
diff --git a/fs/smb/client/cifs_spnego_negtokeninit.asn1 b/fs/smb/client/cifs_spnego_negtokeninit.asn1
new file mode 100644
index 0000000000..181c083887
--- /dev/null
+++ b/fs/smb/client/cifs_spnego_negtokeninit.asn1
@@ -0,0 +1,40 @@
+GSSAPI ::=
+	[APPLICATION 0] IMPLICIT SEQUENCE {
+		thisMech
+			OBJECT IDENTIFIER ({cifs_gssapi_this_mech}),
+		negotiationToken
+			NegotiationToken
+	}
+
+MechType ::= OBJECT IDENTIFIER ({cifs_neg_token_init_mech_type})
+
+MechTypeList ::= SEQUENCE OF MechType
+
+NegHints ::= SEQUENCE {
+	hintName
+		[0] GeneralString OPTIONAL,
+	hintAddress
+		[1] OCTET STRING OPTIONAL
+	}
+
+NegTokenInit2 ::=
+	SEQUENCE {
+		mechTypes
+			[0] MechTypeList OPTIONAL,
+		reqFlags
+			[1] BIT STRING OPTIONAL,
+		mechToken
+			[2] OCTET STRING OPTIONAL,
+		negHints
+			[3] NegHints OPTIONAL,
+		mechListMIC
+			[3] OCTET STRING OPTIONAL
+	}
+
+NegotiationToken ::=
+	CHOICE {
+		negTokenInit
+			[0] NegTokenInit2,
+		negTokenTarg
+			[1] ANY
+	}
diff --git a/fs/smb/client/cifs_swn.c b/fs/smb/client/cifs_swn.c
new file mode 100644
index 0000000000..7233c6a7e6
--- /dev/null
+++ b/fs/smb/client/cifs_swn.c
@@ -0,0 +1,674 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Witness Service client for CIFS
+ *
+ * Copyright (c) 2020 Samuel Cabrero <scabrero@suse.de>
+ */
+
+#include <linux/kref.h>
+#include <net/genetlink.h>
+#include <uapi/linux/cifs/cifs_netlink.h>
+
+#include "cifs_swn.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "fscache.h"
+#include "cifs_debug.h"
+#include "netlink.h"
+
+static DEFINE_IDR(cifs_swnreg_idr);
+static DEFINE_MUTEX(cifs_swnreg_idr_mutex);
+
+struct cifs_swn_reg {
+	int id;
+	struct kref ref_count;
+
+	const char *net_name;
+	const char *share_name;
+	bool net_name_notify;
+	bool share_name_notify;
+	bool ip_notify;
+
+	struct cifs_tcon *tcon;
+};
+
+static int cifs_swn_auth_info_krb(struct cifs_tcon *tcon, struct sk_buff *skb)
+{
+	int ret;
+
+	ret = nla_put_flag(skb, CIFS_GENL_ATTR_SWN_KRB_AUTH);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int cifs_swn_auth_info_ntlm(struct cifs_tcon *tcon, struct sk_buff *skb)
+{
+	int ret;
+
+	if (tcon->ses->user_name != NULL) {
+		ret = nla_put_string(skb, CIFS_GENL_ATTR_SWN_USER_NAME, tcon->ses->user_name);
+		if (ret < 0)
+			return ret;
+	}
+
+	if (tcon->ses->password != NULL) {
+		ret = nla_put_string(skb, CIFS_GENL_ATTR_SWN_PASSWORD, tcon->ses->password);
+		if (ret < 0)
+			return ret;
+	}
+
+	if (tcon->ses->domainName != NULL) {
+		ret = nla_put_string(skb, CIFS_GENL_ATTR_SWN_DOMAIN_NAME, tcon->ses->domainName);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+/*
+ * Sends a register message to the userspace daemon based on the registration.
+ * The authentication information to connect to the witness service is bundled
+ * into the message.
+ */
+static int cifs_swn_send_register_message(struct cifs_swn_reg *swnreg)
+{
+	struct sk_buff *skb;
+	struct genlmsghdr *hdr;
+	enum securityEnum authtype;
+	struct sockaddr_storage *addr;
+	int ret;
+
+	skb = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (skb == NULL) {
+		ret = -ENOMEM;
+		goto fail;
+	}
+
+	hdr = genlmsg_put(skb, 0, 0, &cifs_genl_family, 0, CIFS_GENL_CMD_SWN_REGISTER);
+	if (hdr == NULL) {
+		ret = -ENOMEM;
+		goto nlmsg_fail;
+	}
+
+	ret = nla_put_u32(skb, CIFS_GENL_ATTR_SWN_REGISTRATION_ID, swnreg->id);
+	if (ret < 0)
+		goto nlmsg_fail;
+
+	ret = nla_put_string(skb, CIFS_GENL_ATTR_SWN_NET_NAME, swnreg->net_name);
+	if (ret < 0)
+		goto nlmsg_fail;
+
+	ret = nla_put_string(skb, CIFS_GENL_ATTR_SWN_SHARE_NAME, swnreg->share_name);
+	if (ret < 0)
+		goto nlmsg_fail;
+
+	/*
+	 * If there is an address stored use it instead of the server address, because we are
+	 * in the process of reconnecting to it after a share has been moved or we have been
+	 * told to switch to it (client move message). In these cases we unregister from the
+	 * server address and register to the new address when we receive the notification.
+	 */
+	if (swnreg->tcon->ses->server->use_swn_dstaddr)
+		addr = &swnreg->tcon->ses->server->swn_dstaddr;
+	else
+		addr = &swnreg->tcon->ses->server->dstaddr;
+
+	ret = nla_put(skb, CIFS_GENL_ATTR_SWN_IP, sizeof(struct sockaddr_storage), addr);
+	if (ret < 0)
+		goto nlmsg_fail;
+
+	if (swnreg->net_name_notify) {
+		ret = nla_put_flag(skb, CIFS_GENL_ATTR_SWN_NET_NAME_NOTIFY);
+		if (ret < 0)
+			goto nlmsg_fail;
+	}
+
+	if (swnreg->share_name_notify) {
+		ret = nla_put_flag(skb, CIFS_GENL_ATTR_SWN_SHARE_NAME_NOTIFY);
+		if (ret < 0)
+			goto nlmsg_fail;
+	}
+
+	if (swnreg->ip_notify) {
+		ret = nla_put_flag(skb, CIFS_GENL_ATTR_SWN_IP_NOTIFY);
+		if (ret < 0)
+			goto nlmsg_fail;
+	}
+
+	authtype = cifs_select_sectype(swnreg->tcon->ses->server, swnreg->tcon->ses->sectype);
+	switch (authtype) {
+	case Kerberos:
+		ret = cifs_swn_auth_info_krb(swnreg->tcon, skb);
+		if (ret < 0) {
+			cifs_dbg(VFS, "%s: Failed to get kerberos auth info: %d\n", __func__, ret);
+			goto nlmsg_fail;
+		}
+		break;
+	case NTLMv2:
+	case RawNTLMSSP:
+		ret = cifs_swn_auth_info_ntlm(swnreg->tcon, skb);
+		if (ret < 0) {
+			cifs_dbg(VFS, "%s: Failed to get NTLM auth info: %d\n", __func__, ret);
+			goto nlmsg_fail;
+		}
+		break;
+	default:
+		cifs_dbg(VFS, "%s: secType %d not supported!\n", __func__, authtype);
+		ret = -EINVAL;
+		goto nlmsg_fail;
+	}
+
+	genlmsg_end(skb, hdr);
+	genlmsg_multicast(&cifs_genl_family, skb, 0, CIFS_GENL_MCGRP_SWN, GFP_ATOMIC);
+
+	cifs_dbg(FYI, "%s: Message to register for network name %s with id %d sent\n", __func__,
+			swnreg->net_name, swnreg->id);
+
+	return 0;
+
+nlmsg_fail:
+	genlmsg_cancel(skb, hdr);
+	nlmsg_free(skb);
+fail:
+	return ret;
+}
+
+/*
+ * Sends an uregister message to the userspace daemon based on the registration
+ */
+static int cifs_swn_send_unregister_message(struct cifs_swn_reg *swnreg)
+{
+	struct sk_buff *skb;
+	struct genlmsghdr *hdr;
+	int ret;
+
+	skb = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (skb == NULL)
+		return -ENOMEM;
+
+	hdr = genlmsg_put(skb, 0, 0, &cifs_genl_family, 0, CIFS_GENL_CMD_SWN_UNREGISTER);
+	if (hdr == NULL) {
+		ret = -ENOMEM;
+		goto nlmsg_fail;
+	}
+
+	ret = nla_put_u32(skb, CIFS_GENL_ATTR_SWN_REGISTRATION_ID, swnreg->id);
+	if (ret < 0)
+		goto nlmsg_fail;
+
+	ret = nla_put_string(skb, CIFS_GENL_ATTR_SWN_NET_NAME, swnreg->net_name);
+	if (ret < 0)
+		goto nlmsg_fail;
+
+	ret = nla_put_string(skb, CIFS_GENL_ATTR_SWN_SHARE_NAME, swnreg->share_name);
+	if (ret < 0)
+		goto nlmsg_fail;
+
+	ret = nla_put(skb, CIFS_GENL_ATTR_SWN_IP, sizeof(struct sockaddr_storage),
+			&swnreg->tcon->ses->server->dstaddr);
+	if (ret < 0)
+		goto nlmsg_fail;
+
+	if (swnreg->net_name_notify) {
+		ret = nla_put_flag(skb, CIFS_GENL_ATTR_SWN_NET_NAME_NOTIFY);
+		if (ret < 0)
+			goto nlmsg_fail;
+	}
+
+	if (swnreg->share_name_notify) {
+		ret = nla_put_flag(skb, CIFS_GENL_ATTR_SWN_SHARE_NAME_NOTIFY);
+		if (ret < 0)
+			goto nlmsg_fail;
+	}
+
+	if (swnreg->ip_notify) {
+		ret = nla_put_flag(skb, CIFS_GENL_ATTR_SWN_IP_NOTIFY);
+		if (ret < 0)
+			goto nlmsg_fail;
+	}
+
+	genlmsg_end(skb, hdr);
+	genlmsg_multicast(&cifs_genl_family, skb, 0, CIFS_GENL_MCGRP_SWN, GFP_ATOMIC);
+
+	cifs_dbg(FYI, "%s: Message to unregister for network name %s with id %d sent\n", __func__,
+			swnreg->net_name, swnreg->id);
+
+	return 0;
+
+nlmsg_fail:
+	genlmsg_cancel(skb, hdr);
+	nlmsg_free(skb);
+	return ret;
+}
+
+/*
+ * Try to find a matching registration for the tcon's server name and share name.
+ * Calls to this function must be protected by cifs_swnreg_idr_mutex.
+ * TODO Try to avoid memory allocations
+ */
+static struct cifs_swn_reg *cifs_find_swn_reg(struct cifs_tcon *tcon)
+{
+	struct cifs_swn_reg *swnreg;
+	int id;
+	const char *share_name;
+	const char *net_name;
+
+	net_name = extract_hostname(tcon->tree_name);
+	if (IS_ERR(net_name)) {
+		int ret;
+
+		ret = PTR_ERR(net_name);
+		cifs_dbg(VFS, "%s: failed to extract host name from target '%s': %d\n",
+				__func__, tcon->tree_name, ret);
+		return ERR_PTR(-EINVAL);
+	}
+
+	share_name = extract_sharename(tcon->tree_name);
+	if (IS_ERR(share_name)) {
+		int ret;
+
+		ret = PTR_ERR(share_name);
+		cifs_dbg(VFS, "%s: failed to extract share name from target '%s': %d\n",
+				__func__, tcon->tree_name, ret);
+		kfree(net_name);
+		return ERR_PTR(-EINVAL);
+	}
+
+	idr_for_each_entry(&cifs_swnreg_idr, swnreg, id) {
+		if (strcasecmp(swnreg->net_name, net_name) != 0
+		    || strcasecmp(swnreg->share_name, share_name) != 0) {
+			continue;
+		}
+
+		cifs_dbg(FYI, "Existing swn registration for %s:%s found\n", swnreg->net_name,
+				swnreg->share_name);
+
+		kfree(net_name);
+		kfree(share_name);
+
+		return swnreg;
+	}
+
+	kfree(net_name);
+	kfree(share_name);
+
+	return ERR_PTR(-EEXIST);
+}
+
+/*
+ * Get a registration for the tcon's server and share name, allocating a new one if it does not
+ * exists
+ */
+static struct cifs_swn_reg *cifs_get_swn_reg(struct cifs_tcon *tcon)
+{
+	struct cifs_swn_reg *reg = NULL;
+	int ret;
+
+	mutex_lock(&cifs_swnreg_idr_mutex);
+
+	/* Check if we are already registered for this network and share names */
+	reg = cifs_find_swn_reg(tcon);
+	if (!IS_ERR(reg)) {
+		kref_get(&reg->ref_count);
+		mutex_unlock(&cifs_swnreg_idr_mutex);
+		return reg;
+	} else if (PTR_ERR(reg) != -EEXIST) {
+		mutex_unlock(&cifs_swnreg_idr_mutex);
+		return reg;
+	}
+
+	reg = kmalloc(sizeof(struct cifs_swn_reg), GFP_ATOMIC);
+	if (reg == NULL) {
+		mutex_unlock(&cifs_swnreg_idr_mutex);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	kref_init(&reg->ref_count);
+
+	reg->id = idr_alloc(&cifs_swnreg_idr, reg, 1, 0, GFP_ATOMIC);
+	if (reg->id < 0) {
+		cifs_dbg(FYI, "%s: failed to allocate registration id\n", __func__);
+		ret = reg->id;
+		goto fail;
+	}
+
+	reg->net_name = extract_hostname(tcon->tree_name);
+	if (IS_ERR(reg->net_name)) {
+		ret = PTR_ERR(reg->net_name);
+		cifs_dbg(VFS, "%s: failed to extract host name from target: %d\n", __func__, ret);
+		goto fail_idr;
+	}
+
+	reg->share_name = extract_sharename(tcon->tree_name);
+	if (IS_ERR(reg->share_name)) {
+		ret = PTR_ERR(reg->share_name);
+		cifs_dbg(VFS, "%s: failed to extract share name from target: %d\n", __func__, ret);
+		goto fail_net_name;
+	}
+
+	reg->net_name_notify = true;
+	reg->share_name_notify = true;
+	reg->ip_notify = (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT);
+
+	reg->tcon = tcon;
+
+	mutex_unlock(&cifs_swnreg_idr_mutex);
+
+	return reg;
+
+fail_net_name:
+	kfree(reg->net_name);
+fail_idr:
+	idr_remove(&cifs_swnreg_idr, reg->id);
+fail:
+	kfree(reg);
+	mutex_unlock(&cifs_swnreg_idr_mutex);
+	return ERR_PTR(ret);
+}
+
+static void cifs_swn_reg_release(struct kref *ref)
+{
+	struct cifs_swn_reg *swnreg = container_of(ref, struct cifs_swn_reg, ref_count);
+	int ret;
+
+	ret = cifs_swn_send_unregister_message(swnreg);
+	if (ret < 0)
+		cifs_dbg(VFS, "%s: Failed to send unregister message: %d\n", __func__, ret);
+
+	idr_remove(&cifs_swnreg_idr, swnreg->id);
+	kfree(swnreg->net_name);
+	kfree(swnreg->share_name);
+	kfree(swnreg);
+}
+
+static void cifs_put_swn_reg(struct cifs_swn_reg *swnreg)
+{
+	mutex_lock(&cifs_swnreg_idr_mutex);
+	kref_put(&swnreg->ref_count, cifs_swn_reg_release);
+	mutex_unlock(&cifs_swnreg_idr_mutex);
+}
+
+static int cifs_swn_resource_state_changed(struct cifs_swn_reg *swnreg, const char *name, int state)
+{
+	switch (state) {
+	case CIFS_SWN_RESOURCE_STATE_UNAVAILABLE:
+		cifs_dbg(FYI, "%s: resource name '%s' become unavailable\n", __func__, name);
+		cifs_signal_cifsd_for_reconnect(swnreg->tcon->ses->server, true);
+		break;
+	case CIFS_SWN_RESOURCE_STATE_AVAILABLE:
+		cifs_dbg(FYI, "%s: resource name '%s' become available\n", __func__, name);
+		cifs_signal_cifsd_for_reconnect(swnreg->tcon->ses->server, true);
+		break;
+	case CIFS_SWN_RESOURCE_STATE_UNKNOWN:
+		cifs_dbg(FYI, "%s: resource name '%s' changed to unknown state\n", __func__, name);
+		break;
+	}
+	return 0;
+}
+
+static bool cifs_sockaddr_equal(struct sockaddr_storage *addr1, struct sockaddr_storage *addr2)
+{
+	if (addr1->ss_family != addr2->ss_family)
+		return false;
+
+	if (addr1->ss_family == AF_INET) {
+		return (memcmp(&((const struct sockaddr_in *)addr1)->sin_addr,
+				&((const struct sockaddr_in *)addr2)->sin_addr,
+				sizeof(struct in_addr)) == 0);
+	}
+
+	if (addr1->ss_family == AF_INET6) {
+		return (memcmp(&((const struct sockaddr_in6 *)addr1)->sin6_addr,
+				&((const struct sockaddr_in6 *)addr2)->sin6_addr,
+				sizeof(struct in6_addr)) == 0);
+	}
+
+	return false;
+}
+
+static int cifs_swn_store_swn_addr(const struct sockaddr_storage *new,
+				   const struct sockaddr_storage *old,
+				   struct sockaddr_storage *dst)
+{
+	__be16 port = cpu_to_be16(CIFS_PORT);
+
+	if (old->ss_family == AF_INET) {
+		struct sockaddr_in *ipv4 = (struct sockaddr_in *)old;
+
+		port = ipv4->sin_port;
+	} else if (old->ss_family == AF_INET6) {
+		struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)old;
+
+		port = ipv6->sin6_port;
+	}
+
+	if (new->ss_family == AF_INET) {
+		struct sockaddr_in *ipv4 = (struct sockaddr_in *)new;
+
+		ipv4->sin_port = port;
+	} else if (new->ss_family == AF_INET6) {
+		struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)new;
+
+		ipv6->sin6_port = port;
+	}
+
+	*dst = *new;
+
+	return 0;
+}
+
+static int cifs_swn_reconnect(struct cifs_tcon *tcon, struct sockaddr_storage *addr)
+{
+	int ret = 0;
+
+	/* Store the reconnect address */
+	cifs_server_lock(tcon->ses->server);
+	if (cifs_sockaddr_equal(&tcon->ses->server->dstaddr, addr))
+		goto unlock;
+
+	ret = cifs_swn_store_swn_addr(addr, &tcon->ses->server->dstaddr,
+				      &tcon->ses->server->swn_dstaddr);
+	if (ret < 0) {
+		cifs_dbg(VFS, "%s: failed to store address: %d\n", __func__, ret);
+		goto unlock;
+	}
+	tcon->ses->server->use_swn_dstaddr = true;
+
+	/*
+	 * Unregister to stop receiving notifications for the old IP address.
+	 */
+	ret = cifs_swn_unregister(tcon);
+	if (ret < 0) {
+		cifs_dbg(VFS, "%s: Failed to unregister for witness notifications: %d\n",
+			 __func__, ret);
+		goto unlock;
+	}
+
+	/*
+	 * And register to receive notifications for the new IP address now that we have
+	 * stored the new address.
+	 */
+	ret = cifs_swn_register(tcon);
+	if (ret < 0) {
+		cifs_dbg(VFS, "%s: Failed to register for witness notifications: %d\n",
+			 __func__, ret);
+		goto unlock;
+	}
+
+	cifs_signal_cifsd_for_reconnect(tcon->ses->server, false);
+
+unlock:
+	cifs_server_unlock(tcon->ses->server);
+
+	return ret;
+}
+
+static int cifs_swn_client_move(struct cifs_swn_reg *swnreg, struct sockaddr_storage *addr)
+{
+	struct sockaddr_in *ipv4 = (struct sockaddr_in *)addr;
+	struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)addr;
+
+	if (addr->ss_family == AF_INET)
+		cifs_dbg(FYI, "%s: move to %pI4\n", __func__, &ipv4->sin_addr);
+	else if (addr->ss_family == AF_INET6)
+		cifs_dbg(FYI, "%s: move to %pI6\n", __func__, &ipv6->sin6_addr);
+
+	return cifs_swn_reconnect(swnreg->tcon, addr);
+}
+
+int cifs_swn_notify(struct sk_buff *skb, struct genl_info *info)
+{
+	struct cifs_swn_reg *swnreg;
+	char name[256];
+	int type;
+
+	if (info->attrs[CIFS_GENL_ATTR_SWN_REGISTRATION_ID]) {
+		int swnreg_id;
+
+		swnreg_id = nla_get_u32(info->attrs[CIFS_GENL_ATTR_SWN_REGISTRATION_ID]);
+		mutex_lock(&cifs_swnreg_idr_mutex);
+		swnreg = idr_find(&cifs_swnreg_idr, swnreg_id);
+		mutex_unlock(&cifs_swnreg_idr_mutex);
+		if (swnreg == NULL) {
+			cifs_dbg(FYI, "%s: registration id %d not found\n", __func__, swnreg_id);
+			return -EINVAL;
+		}
+	} else {
+		cifs_dbg(FYI, "%s: missing registration id attribute\n", __func__);
+		return -EINVAL;
+	}
+
+	if (info->attrs[CIFS_GENL_ATTR_SWN_NOTIFICATION_TYPE]) {
+		type = nla_get_u32(info->attrs[CIFS_GENL_ATTR_SWN_NOTIFICATION_TYPE]);
+	} else {
+		cifs_dbg(FYI, "%s: missing notification type attribute\n", __func__);
+		return -EINVAL;
+	}
+
+	switch (type) {
+	case CIFS_SWN_NOTIFICATION_RESOURCE_CHANGE: {
+		int state;
+
+		if (info->attrs[CIFS_GENL_ATTR_SWN_RESOURCE_NAME]) {
+			nla_strscpy(name, info->attrs[CIFS_GENL_ATTR_SWN_RESOURCE_NAME],
+					sizeof(name));
+		} else {
+			cifs_dbg(FYI, "%s: missing resource name attribute\n", __func__);
+			return -EINVAL;
+		}
+		if (info->attrs[CIFS_GENL_ATTR_SWN_RESOURCE_STATE]) {
+			state = nla_get_u32(info->attrs[CIFS_GENL_ATTR_SWN_RESOURCE_STATE]);
+		} else {
+			cifs_dbg(FYI, "%s: missing resource state attribute\n", __func__);
+			return -EINVAL;
+		}
+		return cifs_swn_resource_state_changed(swnreg, name, state);
+	}
+	case CIFS_SWN_NOTIFICATION_CLIENT_MOVE: {
+		struct sockaddr_storage addr;
+
+		if (info->attrs[CIFS_GENL_ATTR_SWN_IP]) {
+			nla_memcpy(&addr, info->attrs[CIFS_GENL_ATTR_SWN_IP], sizeof(addr));
+		} else {
+			cifs_dbg(FYI, "%s: missing IP address attribute\n", __func__);
+			return -EINVAL;
+		}
+		return cifs_swn_client_move(swnreg, &addr);
+	}
+	default:
+		cifs_dbg(FYI, "%s: unknown notification type %d\n", __func__, type);
+		break;
+	}
+
+	return 0;
+}
+
+int cifs_swn_register(struct cifs_tcon *tcon)
+{
+	struct cifs_swn_reg *swnreg;
+	int ret;
+
+	swnreg = cifs_get_swn_reg(tcon);
+	if (IS_ERR(swnreg))
+		return PTR_ERR(swnreg);
+
+	ret = cifs_swn_send_register_message(swnreg);
+	if (ret < 0) {
+		cifs_dbg(VFS, "%s: Failed to send swn register message: %d\n", __func__, ret);
+		/* Do not put the swnreg or return error, the echo task will retry */
+	}
+
+	return 0;
+}
+
+int cifs_swn_unregister(struct cifs_tcon *tcon)
+{
+	struct cifs_swn_reg *swnreg;
+
+	mutex_lock(&cifs_swnreg_idr_mutex);
+
+	swnreg = cifs_find_swn_reg(tcon);
+	if (IS_ERR(swnreg)) {
+		mutex_unlock(&cifs_swnreg_idr_mutex);
+		return PTR_ERR(swnreg);
+	}
+
+	mutex_unlock(&cifs_swnreg_idr_mutex);
+
+	cifs_put_swn_reg(swnreg);
+
+	return 0;
+}
+
+void cifs_swn_dump(struct seq_file *m)
+{
+	struct cifs_swn_reg *swnreg;
+	struct sockaddr_in *sa;
+	struct sockaddr_in6 *sa6;
+	int id;
+
+	seq_puts(m, "Witness registrations:");
+
+	mutex_lock(&cifs_swnreg_idr_mutex);
+	idr_for_each_entry(&cifs_swnreg_idr, swnreg, id) {
+		seq_printf(m, "\nId: %u Refs: %u Network name: '%s'%s Share name: '%s'%s Ip address: ",
+				id, kref_read(&swnreg->ref_count),
+				swnreg->net_name, swnreg->net_name_notify ? "(y)" : "(n)",
+				swnreg->share_name, swnreg->share_name_notify ? "(y)" : "(n)");
+		switch (swnreg->tcon->ses->server->dstaddr.ss_family) {
+		case AF_INET:
+			sa = (struct sockaddr_in *) &swnreg->tcon->ses->server->dstaddr;
+			seq_printf(m, "%pI4", &sa->sin_addr.s_addr);
+			break;
+		case AF_INET6:
+			sa6 = (struct sockaddr_in6 *) &swnreg->tcon->ses->server->dstaddr;
+			seq_printf(m, "%pI6", &sa6->sin6_addr.s6_addr);
+			if (sa6->sin6_scope_id)
+				seq_printf(m, "%%%u", sa6->sin6_scope_id);
+			break;
+		default:
+			seq_puts(m, "(unknown)");
+		}
+		seq_printf(m, "%s", swnreg->ip_notify ? "(y)" : "(n)");
+	}
+	mutex_unlock(&cifs_swnreg_idr_mutex);
+	seq_puts(m, "\n");
+}
+
+void cifs_swn_check(void)
+{
+	struct cifs_swn_reg *swnreg;
+	int id;
+	int ret;
+
+	mutex_lock(&cifs_swnreg_idr_mutex);
+	idr_for_each_entry(&cifs_swnreg_idr, swnreg, id) {
+		ret = cifs_swn_send_register_message(swnreg);
+		if (ret < 0)
+			cifs_dbg(FYI, "%s: Failed to send register message: %d\n", __func__, ret);
+	}
+	mutex_unlock(&cifs_swnreg_idr_mutex);
+}
diff --git a/fs/smb/client/cifs_swn.h b/fs/smb/client/cifs_swn.h
new file mode 100644
index 0000000000..8a9d2a5c90
--- /dev/null
+++ b/fs/smb/client/cifs_swn.h
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Witness Service client for CIFS
+ *
+ * Copyright (c) 2020 Samuel Cabrero <scabrero@suse.de>
+ */
+
+#ifndef _CIFS_SWN_H
+#define _CIFS_SWN_H
+#include "cifsglob.h"
+
+struct cifs_tcon;
+struct sk_buff;
+struct genl_info;
+
+#ifdef CONFIG_CIFS_SWN_UPCALL
+extern int cifs_swn_register(struct cifs_tcon *tcon);
+
+extern int cifs_swn_unregister(struct cifs_tcon *tcon);
+
+extern int cifs_swn_notify(struct sk_buff *skb, struct genl_info *info);
+
+extern void cifs_swn_dump(struct seq_file *m);
+
+extern void cifs_swn_check(void);
+
+static inline bool cifs_swn_set_server_dstaddr(struct TCP_Server_Info *server)
+{
+	if (server->use_swn_dstaddr) {
+		server->dstaddr = server->swn_dstaddr;
+		return true;
+	}
+	return false;
+}
+
+static inline void cifs_swn_reset_server_dstaddr(struct TCP_Server_Info *server)
+{
+	server->use_swn_dstaddr = false;
+}
+
+#else
+
+static inline int cifs_swn_register(struct cifs_tcon *tcon) { return 0; }
+static inline int cifs_swn_unregister(struct cifs_tcon *tcon) { return 0; }
+static inline int cifs_swn_notify(struct sk_buff *s, struct genl_info *i) { return 0; }
+static inline void cifs_swn_dump(struct seq_file *m) {}
+static inline void cifs_swn_check(void) {}
+static inline bool cifs_swn_set_server_dstaddr(struct TCP_Server_Info *server) { return false; }
+static inline void cifs_swn_reset_server_dstaddr(struct TCP_Server_Info *server) {}
+
+#endif /* CONFIG_CIFS_SWN_UPCALL */
+#endif /* _CIFS_SWN_H */
diff --git a/fs/smb/client/cifs_unicode.c b/fs/smb/client/cifs_unicode.c
new file mode 100644
index 0000000000..79d99a9139
--- /dev/null
+++ b/fs/smb/client/cifs_unicode.c
@@ -0,0 +1,631 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *
+ *   Copyright (c) International Business Machines  Corp., 2000,2009
+ *   Modified by Steve French (sfrench@us.ibm.com)
+ */
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include "cifs_fs_sb.h"
+#include "cifs_unicode.h"
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifs_debug.h"
+
+int cifs_remap(struct cifs_sb_info *cifs_sb)
+{
+	int map_type;
+
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SFM_CHR)
+		map_type = SFM_MAP_UNI_RSVD;
+	else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
+		map_type = SFU_MAP_UNI_RSVD;
+	else
+		map_type = NO_MAP_UNI_RSVD;
+
+	return map_type;
+}
+
+/* Convert character using the SFU - "Services for Unix" remapping range */
+static bool
+convert_sfu_char(const __u16 src_char, char *target)
+{
+	/*
+	 * BB: Cannot handle remapping UNI_SLASH until all the calls to
+	 *     build_path_from_dentry are modified, as they use slash as
+	 *     separator.
+	 */
+	switch (src_char) {
+	case UNI_COLON:
+		*target = ':';
+		break;
+	case UNI_ASTERISK:
+		*target = '*';
+		break;
+	case UNI_QUESTION:
+		*target = '?';
+		break;
+	case UNI_PIPE:
+		*target = '|';
+		break;
+	case UNI_GRTRTHAN:
+		*target = '>';
+		break;
+	case UNI_LESSTHAN:
+		*target = '<';
+		break;
+	default:
+		return false;
+	}
+	return true;
+}
+
+/* Convert character using the SFM - "Services for Mac" remapping range */
+static bool
+convert_sfm_char(const __u16 src_char, char *target)
+{
+	if (src_char >= 0xF001 && src_char <= 0xF01F) {
+		*target = src_char - 0xF000;
+		return true;
+	}
+	switch (src_char) {
+	case SFM_COLON:
+		*target = ':';
+		break;
+	case SFM_DOUBLEQUOTE:
+		*target = '"';
+		break;
+	case SFM_ASTERISK:
+		*target = '*';
+		break;
+	case SFM_QUESTION:
+		*target = '?';
+		break;
+	case SFM_PIPE:
+		*target = '|';
+		break;
+	case SFM_GRTRTHAN:
+		*target = '>';
+		break;
+	case SFM_LESSTHAN:
+		*target = '<';
+		break;
+	case SFM_SPACE:
+		*target = ' ';
+		break;
+	case SFM_PERIOD:
+		*target = '.';
+		break;
+	default:
+		return false;
+	}
+	return true;
+}
+
+
+/*
+ * cifs_mapchar - convert a host-endian char to proper char in codepage
+ * @target - where converted character should be copied
+ * @src_char - 2 byte host-endian source character
+ * @cp - codepage to which character should be converted
+ * @map_type - How should the 7 NTFS/SMB reserved characters be mapped to UCS2?
+ *
+ * This function handles the conversion of a single character. It is the
+ * responsibility of the caller to ensure that the target buffer is large
+ * enough to hold the result of the conversion (at least NLS_MAX_CHARSET_SIZE).
+ */
+static int
+cifs_mapchar(char *target, const __u16 *from, const struct nls_table *cp,
+	     int maptype)
+{
+	int len = 1;
+	__u16 src_char;
+
+	src_char = *from;
+
+	if ((maptype == SFM_MAP_UNI_RSVD) && convert_sfm_char(src_char, target))
+		return len;
+	else if ((maptype == SFU_MAP_UNI_RSVD) &&
+		  convert_sfu_char(src_char, target))
+		return len;
+
+	/* if character not one of seven in special remap set */
+	len = cp->uni2char(src_char, target, NLS_MAX_CHARSET_SIZE);
+	if (len <= 0)
+		goto surrogate_pair;
+
+	return len;
+
+surrogate_pair:
+	/* convert SURROGATE_PAIR and IVS */
+	if (strcmp(cp->charset, "utf8"))
+		goto unknown;
+	len = utf16s_to_utf8s(from, 3, UTF16_LITTLE_ENDIAN, target, 6);
+	if (len <= 0)
+		goto unknown;
+	return len;
+
+unknown:
+	*target = '?';
+	len = 1;
+	return len;
+}
+
+/*
+ * cifs_from_utf16 - convert utf16le string to local charset
+ * @to - destination buffer
+ * @from - source buffer
+ * @tolen - destination buffer size (in bytes)
+ * @fromlen - source buffer size (in bytes)
+ * @codepage - codepage to which characters should be converted
+ * @mapchar - should characters be remapped according to the mapchars option?
+ *
+ * Convert a little-endian utf16le string (as sent by the server) to a string
+ * in the provided codepage. The tolen and fromlen parameters are to ensure
+ * that the code doesn't walk off of the end of the buffer (which is always
+ * a danger if the alignment of the source buffer is off). The destination
+ * string is always properly null terminated and fits in the destination
+ * buffer. Returns the length of the destination string in bytes (including
+ * null terminator).
+ *
+ * Note that some windows versions actually send multiword UTF-16 characters
+ * instead of straight UTF16-2. The linux nls routines however aren't able to
+ * deal with those characters properly. In the event that we get some of
+ * those characters, they won't be translated properly.
+ */
+int
+cifs_from_utf16(char *to, const __le16 *from, int tolen, int fromlen,
+		const struct nls_table *codepage, int map_type)
+{
+	int i, charlen, safelen;
+	int outlen = 0;
+	int nullsize = nls_nullsize(codepage);
+	int fromwords = fromlen / 2;
+	char tmp[NLS_MAX_CHARSET_SIZE];
+	__u16 ftmp[3];		/* ftmp[3] = 3array x 2bytes = 6bytes UTF-16 */
+
+	/*
+	 * because the chars can be of varying widths, we need to take care
+	 * not to overflow the destination buffer when we get close to the
+	 * end of it. Until we get to this offset, we don't need to check
+	 * for overflow however.
+	 */
+	safelen = tolen - (NLS_MAX_CHARSET_SIZE + nullsize);
+
+	for (i = 0; i < fromwords; i++) {
+		ftmp[0] = get_unaligned_le16(&from[i]);
+		if (ftmp[0] == 0)
+			break;
+		if (i + 1 < fromwords)
+			ftmp[1] = get_unaligned_le16(&from[i + 1]);
+		else
+			ftmp[1] = 0;
+		if (i + 2 < fromwords)
+			ftmp[2] = get_unaligned_le16(&from[i + 2]);
+		else
+			ftmp[2] = 0;
+
+		/*
+		 * check to see if converting this character might make the
+		 * conversion bleed into the null terminator
+		 */
+		if (outlen >= safelen) {
+			charlen = cifs_mapchar(tmp, ftmp, codepage, map_type);
+			if ((outlen + charlen) > (tolen - nullsize))
+				break;
+		}
+
+		/* put converted char into 'to' buffer */
+		charlen = cifs_mapchar(&to[outlen], ftmp, codepage, map_type);
+		outlen += charlen;
+
+		/* charlen (=bytes of UTF-8 for 1 character)
+		 * 4bytes UTF-8(surrogate pair) is charlen=4
+		 *   (4bytes UTF-16 code)
+		 * 7-8bytes UTF-8(IVS) is charlen=3+4 or 4+4
+		 *   (2 UTF-8 pairs divided to 2 UTF-16 pairs) */
+		if (charlen == 4)
+			i++;
+		else if (charlen >= 5)
+			/* 5-6bytes UTF-8 */
+			i += 2;
+	}
+
+	/* properly null-terminate string */
+	for (i = 0; i < nullsize; i++)
+		to[outlen++] = 0;
+
+	return outlen;
+}
+
+/*
+ * NAME:	cifs_strtoUTF16()
+ *
+ * FUNCTION:	Convert character string to unicode string
+ *
+ */
+int
+cifs_strtoUTF16(__le16 *to, const char *from, int len,
+	      const struct nls_table *codepage)
+{
+	int charlen;
+	int i;
+	wchar_t wchar_to; /* needed to quiet sparse */
+
+	/* special case for utf8 to handle no plane0 chars */
+	if (!strcmp(codepage->charset, "utf8")) {
+		/*
+		 * convert utf8 -> utf16, we assume we have enough space
+		 * as caller should have assumed conversion does not overflow
+		 * in destination len is length in wchar_t units (16bits)
+		 */
+		i  = utf8s_to_utf16s(from, len, UTF16_LITTLE_ENDIAN,
+				       (wchar_t *) to, len);
+
+		/* if success terminate and exit */
+		if (i >= 0)
+			goto success;
+		/*
+		 * if fails fall back to UCS encoding as this
+		 * function should not return negative values
+		 * currently can fail only if source contains
+		 * invalid encoded characters
+		 */
+	}
+
+	for (i = 0; len && *from; i++, from += charlen, len -= charlen) {
+		charlen = codepage->char2uni(from, len, &wchar_to);
+		if (charlen < 1) {
+			cifs_dbg(VFS, "strtoUTF16: char2uni of 0x%x returned %d\n",
+				 *from, charlen);
+			/* A question mark */
+			wchar_to = 0x003f;
+			charlen = 1;
+		}
+		put_unaligned_le16(wchar_to, &to[i]);
+	}
+
+success:
+	put_unaligned_le16(0, &to[i]);
+	return i;
+}
+
+/*
+ * cifs_utf16_bytes - how long will a string be after conversion?
+ * @utf16 - pointer to input string
+ * @maxbytes - don't go past this many bytes of input string
+ * @codepage - destination codepage
+ *
+ * Walk a utf16le string and return the number of bytes that the string will
+ * be after being converted to the given charset, not including any null
+ * termination required. Don't walk past maxbytes in the source buffer.
+ */
+int
+cifs_utf16_bytes(const __le16 *from, int maxbytes,
+		const struct nls_table *codepage)
+{
+	int i;
+	int charlen, outlen = 0;
+	int maxwords = maxbytes / 2;
+	char tmp[NLS_MAX_CHARSET_SIZE];
+	__u16 ftmp[3];
+
+	for (i = 0; i < maxwords; i++) {
+		ftmp[0] = get_unaligned_le16(&from[i]);
+		if (ftmp[0] == 0)
+			break;
+		if (i + 1 < maxwords)
+			ftmp[1] = get_unaligned_le16(&from[i + 1]);
+		else
+			ftmp[1] = 0;
+		if (i + 2 < maxwords)
+			ftmp[2] = get_unaligned_le16(&from[i + 2]);
+		else
+			ftmp[2] = 0;
+
+		charlen = cifs_mapchar(tmp, ftmp, codepage, NO_MAP_UNI_RSVD);
+		outlen += charlen;
+	}
+
+	return outlen;
+}
+
+/*
+ * cifs_strndup_from_utf16 - copy a string from wire format to the local
+ * codepage
+ * @src - source string
+ * @maxlen - don't walk past this many bytes in the source string
+ * @is_unicode - is this a unicode string?
+ * @codepage - destination codepage
+ *
+ * Take a string given by the server, convert it to the local codepage and
+ * put it in a new buffer. Returns a pointer to the new string or NULL on
+ * error.
+ */
+char *
+cifs_strndup_from_utf16(const char *src, const int maxlen,
+			const bool is_unicode, const struct nls_table *codepage)
+{
+	int len;
+	char *dst;
+
+	if (is_unicode) {
+		len = cifs_utf16_bytes((__le16 *) src, maxlen, codepage);
+		len += nls_nullsize(codepage);
+		dst = kmalloc(len, GFP_KERNEL);
+		if (!dst)
+			return NULL;
+		cifs_from_utf16(dst, (__le16 *) src, len, maxlen, codepage,
+				NO_MAP_UNI_RSVD);
+	} else {
+		dst = kstrndup(src, maxlen, GFP_KERNEL);
+	}
+
+	return dst;
+}
+
+static __le16 convert_to_sfu_char(char src_char)
+{
+	__le16 dest_char;
+
+	switch (src_char) {
+	case ':':
+		dest_char = cpu_to_le16(UNI_COLON);
+		break;
+	case '*':
+		dest_char = cpu_to_le16(UNI_ASTERISK);
+		break;
+	case '?':
+		dest_char = cpu_to_le16(UNI_QUESTION);
+		break;
+	case '<':
+		dest_char = cpu_to_le16(UNI_LESSTHAN);
+		break;
+	case '>':
+		dest_char = cpu_to_le16(UNI_GRTRTHAN);
+		break;
+	case '|':
+		dest_char = cpu_to_le16(UNI_PIPE);
+		break;
+	default:
+		dest_char = 0;
+	}
+
+	return dest_char;
+}
+
+static __le16 convert_to_sfm_char(char src_char, bool end_of_string)
+{
+	__le16 dest_char;
+
+	if (src_char >= 0x01 && src_char <= 0x1F) {
+		dest_char = cpu_to_le16(src_char + 0xF000);
+		return dest_char;
+	}
+	switch (src_char) {
+	case ':':
+		dest_char = cpu_to_le16(SFM_COLON);
+		break;
+	case '"':
+		dest_char = cpu_to_le16(SFM_DOUBLEQUOTE);
+		break;
+	case '*':
+		dest_char = cpu_to_le16(SFM_ASTERISK);
+		break;
+	case '?':
+		dest_char = cpu_to_le16(SFM_QUESTION);
+		break;
+	case '<':
+		dest_char = cpu_to_le16(SFM_LESSTHAN);
+		break;
+	case '>':
+		dest_char = cpu_to_le16(SFM_GRTRTHAN);
+		break;
+	case '|':
+		dest_char = cpu_to_le16(SFM_PIPE);
+		break;
+	case '.':
+		if (end_of_string)
+			dest_char = cpu_to_le16(SFM_PERIOD);
+		else
+			dest_char = 0;
+		break;
+	case ' ':
+		if (end_of_string)
+			dest_char = cpu_to_le16(SFM_SPACE);
+		else
+			dest_char = 0;
+		break;
+	default:
+		dest_char = 0;
+	}
+
+	return dest_char;
+}
+
+/*
+ * Convert 16 bit Unicode pathname to wire format from string in current code
+ * page. Conversion may involve remapping up the six characters that are
+ * only legal in POSIX-like OS (if they are present in the string). Path
+ * names are little endian 16 bit Unicode on the wire
+ */
+int
+cifsConvertToUTF16(__le16 *target, const char *source, int srclen,
+		 const struct nls_table *cp, int map_chars)
+{
+	int i, charlen;
+	int j = 0;
+	char src_char;
+	__le16 dst_char;
+	wchar_t tmp;
+	wchar_t *wchar_to;	/* UTF-16 */
+	int ret;
+	unicode_t u;
+
+	if (map_chars == NO_MAP_UNI_RSVD)
+		return cifs_strtoUTF16(target, source, PATH_MAX, cp);
+
+	wchar_to = kzalloc(6, GFP_KERNEL);
+
+	for (i = 0; i < srclen; j++) {
+		src_char = source[i];
+		charlen = 1;
+
+		/* check if end of string */
+		if (src_char == 0)
+			goto ctoUTF16_out;
+
+		/* see if we must remap this char */
+		if (map_chars == SFU_MAP_UNI_RSVD)
+			dst_char = convert_to_sfu_char(src_char);
+		else if (map_chars == SFM_MAP_UNI_RSVD) {
+			bool end_of_string;
+
+			/**
+			 * Remap spaces and periods found at the end of every
+			 * component of the path. The special cases of '.' and
+			 * '..' do not need to be dealt with explicitly because
+			 * they are addressed in namei.c:link_path_walk().
+			 **/
+			if ((i == srclen - 1) || (source[i+1] == '\\'))
+				end_of_string = true;
+			else
+				end_of_string = false;
+
+			dst_char = convert_to_sfm_char(src_char, end_of_string);
+		} else
+			dst_char = 0;
+		/*
+		 * FIXME: We can not handle remapping backslash (UNI_SLASH)
+		 * until all the calls to build_path_from_dentry are modified,
+		 * as they use backslash as separator.
+		 */
+		if (dst_char == 0) {
+			charlen = cp->char2uni(source + i, srclen - i, &tmp);
+			dst_char = cpu_to_le16(tmp);
+
+			/*
+			 * if no match, use question mark, which at least in
+			 * some cases serves as wild card
+			 */
+			if (charlen > 0)
+				goto ctoUTF16;
+
+			/* convert SURROGATE_PAIR */
+			if (strcmp(cp->charset, "utf8") || !wchar_to)
+				goto unknown;
+			if (*(source + i) & 0x80) {
+				charlen = utf8_to_utf32(source + i, 6, &u);
+				if (charlen < 0)
+					goto unknown;
+			} else
+				goto unknown;
+			ret  = utf8s_to_utf16s(source + i, charlen,
+					       UTF16_LITTLE_ENDIAN,
+					       wchar_to, 6);
+			if (ret < 0)
+				goto unknown;
+
+			i += charlen;
+			dst_char = cpu_to_le16(*wchar_to);
+			if (charlen <= 3)
+				/* 1-3bytes UTF-8 to 2bytes UTF-16 */
+				put_unaligned(dst_char, &target[j]);
+			else if (charlen == 4) {
+				/* 4bytes UTF-8(surrogate pair) to 4bytes UTF-16
+				 * 7-8bytes UTF-8(IVS) divided to 2 UTF-16
+				 *   (charlen=3+4 or 4+4) */
+				put_unaligned(dst_char, &target[j]);
+				dst_char = cpu_to_le16(*(wchar_to + 1));
+				j++;
+				put_unaligned(dst_char, &target[j]);
+			} else if (charlen >= 5) {
+				/* 5-6bytes UTF-8 to 6bytes UTF-16 */
+				put_unaligned(dst_char, &target[j]);
+				dst_char = cpu_to_le16(*(wchar_to + 1));
+				j++;
+				put_unaligned(dst_char, &target[j]);
+				dst_char = cpu_to_le16(*(wchar_to + 2));
+				j++;
+				put_unaligned(dst_char, &target[j]);
+			}
+			continue;
+
+unknown:
+			dst_char = cpu_to_le16(0x003f);
+			charlen = 1;
+		}
+
+ctoUTF16:
+		/*
+		 * character may take more than one byte in the source string,
+		 * but will take exactly two bytes in the target string
+		 */
+		i += charlen;
+		put_unaligned(dst_char, &target[j]);
+	}
+
+ctoUTF16_out:
+	put_unaligned(0, &target[j]); /* Null terminate target unicode string */
+	kfree(wchar_to);
+	return j;
+}
+
+/*
+ * cifs_local_to_utf16_bytes - how long will a string be after conversion?
+ * @from - pointer to input string
+ * @maxbytes - don't go past this many bytes of input string
+ * @codepage - source codepage
+ *
+ * Walk a string and return the number of bytes that the string will
+ * be after being converted to the given charset, not including any null
+ * termination required. Don't walk past maxbytes in the source buffer.
+ */
+
+static int
+cifs_local_to_utf16_bytes(const char *from, int len,
+			  const struct nls_table *codepage)
+{
+	int charlen;
+	int i;
+	wchar_t wchar_to;
+
+	for (i = 0; len && *from; i++, from += charlen, len -= charlen) {
+		charlen = codepage->char2uni(from, len, &wchar_to);
+		/* Failed conversion defaults to a question mark */
+		if (charlen < 1)
+			charlen = 1;
+	}
+	return 2 * i; /* UTF16 characters are two bytes */
+}
+
+/*
+ * cifs_strndup_to_utf16 - copy a string to wire format from the local codepage
+ * @src - source string
+ * @maxlen - don't walk past this many bytes in the source string
+ * @utf16_len - the length of the allocated string in bytes (including null)
+ * @cp - source codepage
+ * @remap - map special chars
+ *
+ * Take a string convert it from the local codepage to UTF16 and
+ * put it in a new buffer. Returns a pointer to the new string or NULL on
+ * error.
+ */
+__le16 *
+cifs_strndup_to_utf16(const char *src, const int maxlen, int *utf16_len,
+		      const struct nls_table *cp, int remap)
+{
+	int len;
+	__le16 *dst;
+
+	len = cifs_local_to_utf16_bytes(src, maxlen, cp);
+	len += 2; /* NULL */
+	dst = kmalloc(len, GFP_KERNEL);
+	if (!dst) {
+		*utf16_len = 0;
+		return NULL;
+	}
+	cifsConvertToUTF16(dst, src, strlen(src), cp, remap);
+	*utf16_len = len;
+	return dst;
+}
diff --git a/fs/smb/client/cifs_unicode.h b/fs/smb/client/cifs_unicode.h
new file mode 100644
index 0000000000..e137a0dfbb
--- /dev/null
+++ b/fs/smb/client/cifs_unicode.h
@@ -0,0 +1,76 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * cifs_unicode:  Unicode kernel case support
+ *
+ * Function:
+ *     Convert a unicode character to upper or lower case using
+ *     compressed tables.
+ *
+ *   Copyright (c) International Business Machines  Corp., 2000,2009
+ *
+ * Notes:
+ *     These APIs are based on the C library functions.  The semantics
+ *     should match the C functions but with expanded size operands.
+ *
+ *     The upper/lower functions are based on a table created by mkupr.
+ *     This is a compressed table of upper and lower case conversion.
+ */
+#ifndef _CIFS_UNICODE_H
+#define _CIFS_UNICODE_H
+
+#include <asm/byteorder.h>
+#include <linux/types.h>
+#include <linux/nls.h>
+#include "../../nls/nls_ucs2_utils.h"
+
+/*
+ * Macs use an older "SFM" mapping of the symbols above. Fortunately it does
+ * not conflict (although almost does) with the mapping above.
+ */
+
+#define SFM_DOUBLEQUOTE ((__u16) 0xF020)
+#define SFM_ASTERISK    ((__u16) 0xF021)
+#define SFM_QUESTION    ((__u16) 0xF025)
+#define SFM_COLON       ((__u16) 0xF022)
+#define SFM_GRTRTHAN    ((__u16) 0xF024)
+#define SFM_LESSTHAN    ((__u16) 0xF023)
+#define SFM_PIPE        ((__u16) 0xF027)
+#define SFM_SLASH       ((__u16) 0xF026)
+#define SFM_SPACE	((__u16) 0xF028)
+#define SFM_PERIOD	((__u16) 0xF029)
+
+/*
+ * Mapping mechanism to use when one of the seven reserved characters is
+ * encountered.  We can only map using one of the mechanisms at a time
+ * since otherwise readdir could return directory entries which we would
+ * not be able to open
+ *
+ * NO_MAP_UNI_RSVD  = do not perform any remapping of the character
+ * SFM_MAP_UNI_RSVD = map reserved characters using SFM scheme (MAC compatible)
+ * SFU_MAP_UNI_RSVD = map reserved characters ala SFU ("mapchars" option)
+ *
+ */
+#define NO_MAP_UNI_RSVD		0
+#define SFM_MAP_UNI_RSVD	1
+#define SFU_MAP_UNI_RSVD	2
+
+#ifdef __KERNEL__
+int cifs_from_utf16(char *to, const __le16 *from, int tolen, int fromlen,
+		    const struct nls_table *cp, int map_type);
+int cifs_utf16_bytes(const __le16 *from, int maxbytes,
+		     const struct nls_table *codepage);
+int cifs_strtoUTF16(__le16 *, const char *, int, const struct nls_table *);
+char *cifs_strndup_from_utf16(const char *src, const int maxlen,
+			      const bool is_unicode,
+			      const struct nls_table *codepage);
+extern int cifsConvertToUTF16(__le16 *target, const char *source, int maxlen,
+			      const struct nls_table *cp, int mapChars);
+extern int cifs_remap(struct cifs_sb_info *cifs_sb);
+extern __le16 *cifs_strndup_to_utf16(const char *src, const int maxlen,
+				     int *utf16_len, const struct nls_table *cp,
+				     int remap);
+#endif
+
+wchar_t cifs_toupper(wchar_t in);
+
+#endif /* _CIFS_UNICODE_H */
diff --git a/fs/smb/client/cifsacl.c b/fs/smb/client/cifsacl.c
new file mode 100644
index 0000000000..f5b6df82e8
--- /dev/null
+++ b/fs/smb/client/cifsacl.c
@@ -0,0 +1,1811 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *
+ *   Copyright (C) International Business Machines  Corp., 2007,2008
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   Contains the routines for mapping CIFS/NTFS ACLs
+ *
+ */
+
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/keyctl.h>
+#include <linux/key-type.h>
+#include <uapi/linux/posix_acl.h>
+#include <linux/posix_acl.h>
+#include <linux/posix_acl_xattr.h>
+#include <keys/user-type.h>
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsacl.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "fs_context.h"
+#include "cifs_fs_sb.h"
+#include "cifs_unicode.h"
+
+/* security id for everyone/world system group */
+static const struct cifs_sid sid_everyone = {
+	1, 1, {0, 0, 0, 0, 0, 1}, {0} };
+/* security id for Authenticated Users system group */
+static const struct cifs_sid sid_authusers = {
+	1, 1, {0, 0, 0, 0, 0, 5}, {cpu_to_le32(11)} };
+
+/* S-1-22-1 Unmapped Unix users */
+static const struct cifs_sid sid_unix_users = {1, 1, {0, 0, 0, 0, 0, 22},
+		{cpu_to_le32(1), 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} };
+
+/* S-1-22-2 Unmapped Unix groups */
+static const struct cifs_sid sid_unix_groups = { 1, 1, {0, 0, 0, 0, 0, 22},
+		{cpu_to_le32(2), 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} };
+
+/*
+ * See https://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx
+ */
+
+/* S-1-5-88 MS NFS and Apple style UID/GID/mode */
+
+/* S-1-5-88-1 Unix uid */
+static const struct cifs_sid sid_unix_NFS_users = { 1, 2, {0, 0, 0, 0, 0, 5},
+	{cpu_to_le32(88),
+	 cpu_to_le32(1), 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} };
+
+/* S-1-5-88-2 Unix gid */
+static const struct cifs_sid sid_unix_NFS_groups = { 1, 2, {0, 0, 0, 0, 0, 5},
+	{cpu_to_le32(88),
+	 cpu_to_le32(2), 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} };
+
+/* S-1-5-88-3 Unix mode */
+static const struct cifs_sid sid_unix_NFS_mode = { 1, 2, {0, 0, 0, 0, 0, 5},
+	{cpu_to_le32(88),
+	 cpu_to_le32(3), 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} };
+
+static const struct cred *root_cred;
+
+static int
+cifs_idmap_key_instantiate(struct key *key, struct key_preparsed_payload *prep)
+{
+	char *payload;
+
+	/*
+	 * If the payload is less than or equal to the size of a pointer, then
+	 * an allocation here is wasteful. Just copy the data directly to the
+	 * payload.value union member instead.
+	 *
+	 * With this however, you must check the datalen before trying to
+	 * dereference payload.data!
+	 */
+	if (prep->datalen <= sizeof(key->payload)) {
+		key->payload.data[0] = NULL;
+		memcpy(&key->payload, prep->data, prep->datalen);
+	} else {
+		payload = kmemdup(prep->data, prep->datalen, GFP_KERNEL);
+		if (!payload)
+			return -ENOMEM;
+		key->payload.data[0] = payload;
+	}
+
+	key->datalen = prep->datalen;
+	return 0;
+}
+
+static inline void
+cifs_idmap_key_destroy(struct key *key)
+{
+	if (key->datalen > sizeof(key->payload))
+		kfree(key->payload.data[0]);
+}
+
+static struct key_type cifs_idmap_key_type = {
+	.name        = "cifs.idmap",
+	.instantiate = cifs_idmap_key_instantiate,
+	.destroy     = cifs_idmap_key_destroy,
+	.describe    = user_describe,
+};
+
+static char *
+sid_to_key_str(struct cifs_sid *sidptr, unsigned int type)
+{
+	int i, len;
+	unsigned int saval;
+	char *sidstr, *strptr;
+	unsigned long long id_auth_val;
+
+	/* 3 bytes for prefix */
+	sidstr = kmalloc(3 + SID_STRING_BASE_SIZE +
+			 (SID_STRING_SUBAUTH_SIZE * sidptr->num_subauth),
+			 GFP_KERNEL);
+	if (!sidstr)
+		return sidstr;
+
+	strptr = sidstr;
+	len = sprintf(strptr, "%cs:S-%hhu", type == SIDOWNER ? 'o' : 'g',
+			sidptr->revision);
+	strptr += len;
+
+	/* The authority field is a single 48-bit number */
+	id_auth_val = (unsigned long long)sidptr->authority[5];
+	id_auth_val |= (unsigned long long)sidptr->authority[4] << 8;
+	id_auth_val |= (unsigned long long)sidptr->authority[3] << 16;
+	id_auth_val |= (unsigned long long)sidptr->authority[2] << 24;
+	id_auth_val |= (unsigned long long)sidptr->authority[1] << 32;
+	id_auth_val |= (unsigned long long)sidptr->authority[0] << 48;
+
+	/*
+	 * MS-DTYP states that if the authority is >= 2^32, then it should be
+	 * expressed as a hex value.
+	 */
+	if (id_auth_val <= UINT_MAX)
+		len = sprintf(strptr, "-%llu", id_auth_val);
+	else
+		len = sprintf(strptr, "-0x%llx", id_auth_val);
+
+	strptr += len;
+
+	for (i = 0; i < sidptr->num_subauth; ++i) {
+		saval = le32_to_cpu(sidptr->sub_auth[i]);
+		len = sprintf(strptr, "-%u", saval);
+		strptr += len;
+	}
+
+	return sidstr;
+}
+
+/*
+ * if the two SIDs (roughly equivalent to a UUID for a user or group) are
+ * the same returns zero, if they do not match returns non-zero.
+ */
+static int
+compare_sids(const struct cifs_sid *ctsid, const struct cifs_sid *cwsid)
+{
+	int i;
+	int num_subauth, num_sat, num_saw;
+
+	if ((!ctsid) || (!cwsid))
+		return 1;
+
+	/* compare the revision */
+	if (ctsid->revision != cwsid->revision) {
+		if (ctsid->revision > cwsid->revision)
+			return 1;
+		else
+			return -1;
+	}
+
+	/* compare all of the six auth values */
+	for (i = 0; i < NUM_AUTHS; ++i) {
+		if (ctsid->authority[i] != cwsid->authority[i]) {
+			if (ctsid->authority[i] > cwsid->authority[i])
+				return 1;
+			else
+				return -1;
+		}
+	}
+
+	/* compare all of the subauth values if any */
+	num_sat = ctsid->num_subauth;
+	num_saw = cwsid->num_subauth;
+	num_subauth = num_sat < num_saw ? num_sat : num_saw;
+	if (num_subauth) {
+		for (i = 0; i < num_subauth; ++i) {
+			if (ctsid->sub_auth[i] != cwsid->sub_auth[i]) {
+				if (le32_to_cpu(ctsid->sub_auth[i]) >
+					le32_to_cpu(cwsid->sub_auth[i]))
+					return 1;
+				else
+					return -1;
+			}
+		}
+	}
+
+	return 0; /* sids compare/match */
+}
+
+static bool
+is_well_known_sid(const struct cifs_sid *psid, uint32_t *puid, bool is_group)
+{
+	int i;
+	int num_subauth;
+	const struct cifs_sid *pwell_known_sid;
+
+	if (!psid || (puid == NULL))
+		return false;
+
+	num_subauth = psid->num_subauth;
+
+	/* check if Mac (or Windows NFS) vs. Samba format for Unix owner SID */
+	if (num_subauth == 2) {
+		if (is_group)
+			pwell_known_sid = &sid_unix_groups;
+		else
+			pwell_known_sid = &sid_unix_users;
+	} else if (num_subauth == 3) {
+		if (is_group)
+			pwell_known_sid = &sid_unix_NFS_groups;
+		else
+			pwell_known_sid = &sid_unix_NFS_users;
+	} else
+		return false;
+
+	/* compare the revision */
+	if (psid->revision != pwell_known_sid->revision)
+		return false;
+
+	/* compare all of the six auth values */
+	for (i = 0; i < NUM_AUTHS; ++i) {
+		if (psid->authority[i] != pwell_known_sid->authority[i]) {
+			cifs_dbg(FYI, "auth %d did not match\n", i);
+			return false;
+		}
+	}
+
+	if (num_subauth == 2) {
+		if (psid->sub_auth[0] != pwell_known_sid->sub_auth[0])
+			return false;
+
+		*puid = le32_to_cpu(psid->sub_auth[1]);
+	} else /* 3 subauths, ie Windows/Mac style */ {
+		*puid = le32_to_cpu(psid->sub_auth[0]);
+		if ((psid->sub_auth[0] != pwell_known_sid->sub_auth[0]) ||
+		    (psid->sub_auth[1] != pwell_known_sid->sub_auth[1]))
+			return false;
+
+		*puid = le32_to_cpu(psid->sub_auth[2]);
+	}
+
+	cifs_dbg(FYI, "Unix UID %d returned from SID\n", *puid);
+	return true; /* well known sid found, uid returned */
+}
+
+static __u16
+cifs_copy_sid(struct cifs_sid *dst, const struct cifs_sid *src)
+{
+	int i;
+	__u16 size = 1 + 1 + 6;
+
+	dst->revision = src->revision;
+	dst->num_subauth = min_t(u8, src->num_subauth, SID_MAX_SUB_AUTHORITIES);
+	for (i = 0; i < NUM_AUTHS; ++i)
+		dst->authority[i] = src->authority[i];
+	for (i = 0; i < dst->num_subauth; ++i)
+		dst->sub_auth[i] = src->sub_auth[i];
+	size += (dst->num_subauth * 4);
+
+	return size;
+}
+
+static int
+id_to_sid(unsigned int cid, uint sidtype, struct cifs_sid *ssid)
+{
+	int rc;
+	struct key *sidkey;
+	struct cifs_sid *ksid;
+	unsigned int ksid_size;
+	char desc[3 + 10 + 1]; /* 3 byte prefix + 10 bytes for value + NULL */
+	const struct cred *saved_cred;
+
+	rc = snprintf(desc, sizeof(desc), "%ci:%u",
+			sidtype == SIDOWNER ? 'o' : 'g', cid);
+	if (rc >= sizeof(desc))
+		return -EINVAL;
+
+	rc = 0;
+	saved_cred = override_creds(root_cred);
+	sidkey = request_key(&cifs_idmap_key_type, desc, "");
+	if (IS_ERR(sidkey)) {
+		rc = -EINVAL;
+		cifs_dbg(FYI, "%s: Can't map %cid %u to a SID\n",
+			 __func__, sidtype == SIDOWNER ? 'u' : 'g', cid);
+		goto out_revert_creds;
+	} else if (sidkey->datalen < CIFS_SID_BASE_SIZE) {
+		rc = -EIO;
+		cifs_dbg(FYI, "%s: Downcall contained malformed key (datalen=%hu)\n",
+			 __func__, sidkey->datalen);
+		goto invalidate_key;
+	}
+
+	/*
+	 * A sid is usually too large to be embedded in payload.value, but if
+	 * there are no subauthorities and the host has 8-byte pointers, then
+	 * it could be.
+	 */
+	ksid = sidkey->datalen <= sizeof(sidkey->payload) ?
+		(struct cifs_sid *)&sidkey->payload :
+		(struct cifs_sid *)sidkey->payload.data[0];
+
+	ksid_size = CIFS_SID_BASE_SIZE + (ksid->num_subauth * sizeof(__le32));
+	if (ksid_size > sidkey->datalen) {
+		rc = -EIO;
+		cifs_dbg(FYI, "%s: Downcall contained malformed key (datalen=%hu, ksid_size=%u)\n",
+			 __func__, sidkey->datalen, ksid_size);
+		goto invalidate_key;
+	}
+
+	cifs_copy_sid(ssid, ksid);
+out_key_put:
+	key_put(sidkey);
+out_revert_creds:
+	revert_creds(saved_cred);
+	return rc;
+
+invalidate_key:
+	key_invalidate(sidkey);
+	goto out_key_put;
+}
+
+int
+sid_to_id(struct cifs_sb_info *cifs_sb, struct cifs_sid *psid,
+		struct cifs_fattr *fattr, uint sidtype)
+{
+	int rc = 0;
+	struct key *sidkey;
+	char *sidstr;
+	const struct cred *saved_cred;
+	kuid_t fuid = cifs_sb->ctx->linux_uid;
+	kgid_t fgid = cifs_sb->ctx->linux_gid;
+
+	/*
+	 * If we have too many subauthorities, then something is really wrong.
+	 * Just return an error.
+	 */
+	if (unlikely(psid->num_subauth > SID_MAX_SUB_AUTHORITIES)) {
+		cifs_dbg(FYI, "%s: %u subauthorities is too many!\n",
+			 __func__, psid->num_subauth);
+		return -EIO;
+	}
+
+	if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL) ||
+	    (cifs_sb_master_tcon(cifs_sb)->posix_extensions)) {
+		uint32_t unix_id;
+		bool is_group;
+
+		if (sidtype != SIDOWNER)
+			is_group = true;
+		else
+			is_group = false;
+
+		if (is_well_known_sid(psid, &unix_id, is_group) == false)
+			goto try_upcall_to_get_id;
+
+		if (is_group) {
+			kgid_t gid;
+			gid_t id;
+
+			id = (gid_t)unix_id;
+			gid = make_kgid(&init_user_ns, id);
+			if (gid_valid(gid)) {
+				fgid = gid;
+				goto got_valid_id;
+			}
+		} else {
+			kuid_t uid;
+			uid_t id;
+
+			id = (uid_t)unix_id;
+			uid = make_kuid(&init_user_ns, id);
+			if (uid_valid(uid)) {
+				fuid = uid;
+				goto got_valid_id;
+			}
+		}
+		/* If unable to find uid/gid easily from SID try via upcall */
+	}
+
+try_upcall_to_get_id:
+	sidstr = sid_to_key_str(psid, sidtype);
+	if (!sidstr)
+		return -ENOMEM;
+
+	saved_cred = override_creds(root_cred);
+	sidkey = request_key(&cifs_idmap_key_type, sidstr, "");
+	if (IS_ERR(sidkey)) {
+		cifs_dbg(FYI, "%s: Can't map SID %s to a %cid\n",
+			 __func__, sidstr, sidtype == SIDOWNER ? 'u' : 'g');
+		goto out_revert_creds;
+	}
+
+	/*
+	 * FIXME: Here we assume that uid_t and gid_t are same size. It's
+	 * probably a safe assumption but might be better to check based on
+	 * sidtype.
+	 */
+	BUILD_BUG_ON(sizeof(uid_t) != sizeof(gid_t));
+	if (sidkey->datalen != sizeof(uid_t)) {
+		cifs_dbg(FYI, "%s: Downcall contained malformed key (datalen=%hu)\n",
+			 __func__, sidkey->datalen);
+		key_invalidate(sidkey);
+		goto out_key_put;
+	}
+
+	if (sidtype == SIDOWNER) {
+		kuid_t uid;
+		uid_t id;
+		memcpy(&id, &sidkey->payload.data[0], sizeof(uid_t));
+		uid = make_kuid(&init_user_ns, id);
+		if (uid_valid(uid))
+			fuid = uid;
+	} else {
+		kgid_t gid;
+		gid_t id;
+		memcpy(&id, &sidkey->payload.data[0], sizeof(gid_t));
+		gid = make_kgid(&init_user_ns, id);
+		if (gid_valid(gid))
+			fgid = gid;
+	}
+
+out_key_put:
+	key_put(sidkey);
+out_revert_creds:
+	revert_creds(saved_cred);
+	kfree(sidstr);
+
+	/*
+	 * Note that we return 0 here unconditionally. If the mapping
+	 * fails then we just fall back to using the ctx->linux_uid/linux_gid.
+	 */
+got_valid_id:
+	rc = 0;
+	if (sidtype == SIDOWNER)
+		fattr->cf_uid = fuid;
+	else
+		fattr->cf_gid = fgid;
+	return rc;
+}
+
+int
+init_cifs_idmap(void)
+{
+	struct cred *cred;
+	struct key *keyring;
+	int ret;
+
+	cifs_dbg(FYI, "Registering the %s key type\n",
+		 cifs_idmap_key_type.name);
+
+	/* create an override credential set with a special thread keyring in
+	 * which requests are cached
+	 *
+	 * this is used to prevent malicious redirections from being installed
+	 * with add_key().
+	 */
+	cred = prepare_kernel_cred(&init_task);
+	if (!cred)
+		return -ENOMEM;
+
+	keyring = keyring_alloc(".cifs_idmap",
+				GLOBAL_ROOT_UID, GLOBAL_ROOT_GID, cred,
+				(KEY_POS_ALL & ~KEY_POS_SETATTR) |
+				KEY_USR_VIEW | KEY_USR_READ,
+				KEY_ALLOC_NOT_IN_QUOTA, NULL, NULL);
+	if (IS_ERR(keyring)) {
+		ret = PTR_ERR(keyring);
+		goto failed_put_cred;
+	}
+
+	ret = register_key_type(&cifs_idmap_key_type);
+	if (ret < 0)
+		goto failed_put_key;
+
+	/* instruct request_key() to use this special keyring as a cache for
+	 * the results it looks up */
+	set_bit(KEY_FLAG_ROOT_CAN_CLEAR, &keyring->flags);
+	cred->thread_keyring = keyring;
+	cred->jit_keyring = KEY_REQKEY_DEFL_THREAD_KEYRING;
+	root_cred = cred;
+
+	cifs_dbg(FYI, "cifs idmap keyring: %d\n", key_serial(keyring));
+	return 0;
+
+failed_put_key:
+	key_put(keyring);
+failed_put_cred:
+	put_cred(cred);
+	return ret;
+}
+
+void
+exit_cifs_idmap(void)
+{
+	key_revoke(root_cred->thread_keyring);
+	unregister_key_type(&cifs_idmap_key_type);
+	put_cred(root_cred);
+	cifs_dbg(FYI, "Unregistered %s key type\n", cifs_idmap_key_type.name);
+}
+
+/* copy ntsd, owner sid, and group sid from a security descriptor to another */
+static __u32 copy_sec_desc(const struct cifs_ntsd *pntsd,
+				struct cifs_ntsd *pnntsd,
+				__u32 sidsoffset,
+				struct cifs_sid *pownersid,
+				struct cifs_sid *pgrpsid)
+{
+	struct cifs_sid *owner_sid_ptr, *group_sid_ptr;
+	struct cifs_sid *nowner_sid_ptr, *ngroup_sid_ptr;
+
+	/* copy security descriptor control portion */
+	pnntsd->revision = pntsd->revision;
+	pnntsd->type = pntsd->type;
+	pnntsd->dacloffset = cpu_to_le32(sizeof(struct cifs_ntsd));
+	pnntsd->sacloffset = 0;
+	pnntsd->osidoffset = cpu_to_le32(sidsoffset);
+	pnntsd->gsidoffset = cpu_to_le32(sidsoffset + sizeof(struct cifs_sid));
+
+	/* copy owner sid */
+	if (pownersid)
+		owner_sid_ptr = pownersid;
+	else
+		owner_sid_ptr = (struct cifs_sid *)((char *)pntsd +
+				le32_to_cpu(pntsd->osidoffset));
+	nowner_sid_ptr = (struct cifs_sid *)((char *)pnntsd + sidsoffset);
+	cifs_copy_sid(nowner_sid_ptr, owner_sid_ptr);
+
+	/* copy group sid */
+	if (pgrpsid)
+		group_sid_ptr = pgrpsid;
+	else
+		group_sid_ptr = (struct cifs_sid *)((char *)pntsd +
+				le32_to_cpu(pntsd->gsidoffset));
+	ngroup_sid_ptr = (struct cifs_sid *)((char *)pnntsd + sidsoffset +
+					sizeof(struct cifs_sid));
+	cifs_copy_sid(ngroup_sid_ptr, group_sid_ptr);
+
+	return sidsoffset + (2 * sizeof(struct cifs_sid));
+}
+
+
+/*
+   change posix mode to reflect permissions
+   pmode is the existing mode (we only want to overwrite part of this
+   bits to set can be: S_IRWXU, S_IRWXG or S_IRWXO ie 00700 or 00070 or 00007
+*/
+static void access_flags_to_mode(__le32 ace_flags, int type, umode_t *pmode,
+				 umode_t *pdenied, umode_t mask)
+{
+	__u32 flags = le32_to_cpu(ace_flags);
+	/*
+	 * Do not assume "preferred" or "canonical" order.
+	 * The first DENY or ALLOW ACE which matches perfectly is
+	 * the permission to be used. Once allowed or denied, same
+	 * permission in later ACEs do not matter.
+	 */
+
+	/* If not already allowed, deny these bits */
+	if (type == ACCESS_DENIED) {
+		if (flags & GENERIC_ALL &&
+				!(*pmode & mask & 0777))
+			*pdenied |= mask & 0777;
+
+		if (((flags & GENERIC_WRITE) ||
+				((flags & FILE_WRITE_RIGHTS) == FILE_WRITE_RIGHTS)) &&
+				!(*pmode & mask & 0222))
+			*pdenied |= mask & 0222;
+
+		if (((flags & GENERIC_READ) ||
+				((flags & FILE_READ_RIGHTS) == FILE_READ_RIGHTS)) &&
+				!(*pmode & mask & 0444))
+			*pdenied |= mask & 0444;
+
+		if (((flags & GENERIC_EXECUTE) ||
+				((flags & FILE_EXEC_RIGHTS) == FILE_EXEC_RIGHTS)) &&
+				!(*pmode & mask & 0111))
+			*pdenied |= mask & 0111;
+
+		return;
+	} else if (type != ACCESS_ALLOWED) {
+		cifs_dbg(VFS, "unknown access control type %d\n", type);
+		return;
+	}
+	/* else ACCESS_ALLOWED type */
+
+	if ((flags & GENERIC_ALL) &&
+			!(*pdenied & mask & 0777)) {
+		*pmode |= mask & 0777;
+		cifs_dbg(NOISY, "all perms\n");
+		return;
+	}
+
+	if (((flags & GENERIC_WRITE) ||
+			((flags & FILE_WRITE_RIGHTS) == FILE_WRITE_RIGHTS)) &&
+			!(*pdenied & mask & 0222))
+		*pmode |= mask & 0222;
+
+	if (((flags & GENERIC_READ) ||
+			((flags & FILE_READ_RIGHTS) == FILE_READ_RIGHTS)) &&
+			!(*pdenied & mask & 0444))
+		*pmode |= mask & 0444;
+
+	if (((flags & GENERIC_EXECUTE) ||
+			((flags & FILE_EXEC_RIGHTS) == FILE_EXEC_RIGHTS)) &&
+			!(*pdenied & mask & 0111))
+		*pmode |= mask & 0111;
+
+	/* If DELETE_CHILD is set only on an owner ACE, set sticky bit */
+	if (flags & FILE_DELETE_CHILD) {
+		if (mask == ACL_OWNER_MASK) {
+			if (!(*pdenied & 01000))
+				*pmode |= 01000;
+		} else if (!(*pdenied & 01000)) {
+			*pmode &= ~01000;
+			*pdenied |= 01000;
+		}
+	}
+
+	cifs_dbg(NOISY, "access flags 0x%x mode now %04o\n", flags, *pmode);
+	return;
+}
+
+/*
+   Generate access flags to reflect permissions mode is the existing mode.
+   This function is called for every ACE in the DACL whose SID matches
+   with either owner or group or everyone.
+*/
+
+static void mode_to_access_flags(umode_t mode, umode_t bits_to_use,
+				__u32 *pace_flags)
+{
+	/* reset access mask */
+	*pace_flags = 0x0;
+
+	/* bits to use are either S_IRWXU or S_IRWXG or S_IRWXO */
+	mode &= bits_to_use;
+
+	/* check for R/W/X UGO since we do not know whose flags
+	   is this but we have cleared all the bits sans RWX for
+	   either user or group or other as per bits_to_use */
+	if (mode & S_IRUGO)
+		*pace_flags |= SET_FILE_READ_RIGHTS;
+	if (mode & S_IWUGO)
+		*pace_flags |= SET_FILE_WRITE_RIGHTS;
+	if (mode & S_IXUGO)
+		*pace_flags |= SET_FILE_EXEC_RIGHTS;
+
+	cifs_dbg(NOISY, "mode: %04o, access flags now 0x%x\n",
+		 mode, *pace_flags);
+	return;
+}
+
+static __u16 cifs_copy_ace(struct cifs_ace *dst, struct cifs_ace *src, struct cifs_sid *psid)
+{
+	__u16 size = 1 + 1 + 2 + 4;
+
+	dst->type = src->type;
+	dst->flags = src->flags;
+	dst->access_req = src->access_req;
+
+	/* Check if there's a replacement sid specified */
+	if (psid)
+		size += cifs_copy_sid(&dst->sid, psid);
+	else
+		size += cifs_copy_sid(&dst->sid, &src->sid);
+
+	dst->size = cpu_to_le16(size);
+
+	return size;
+}
+
+static __u16 fill_ace_for_sid(struct cifs_ace *pntace,
+			const struct cifs_sid *psid, __u64 nmode,
+			umode_t bits, __u8 access_type,
+			bool allow_delete_child)
+{
+	int i;
+	__u16 size = 0;
+	__u32 access_req = 0;
+
+	pntace->type = access_type;
+	pntace->flags = 0x0;
+	mode_to_access_flags(nmode, bits, &access_req);
+
+	if (access_type == ACCESS_ALLOWED && allow_delete_child)
+		access_req |= FILE_DELETE_CHILD;
+
+	if (access_type == ACCESS_ALLOWED && !access_req)
+		access_req = SET_MINIMUM_RIGHTS;
+	else if (access_type == ACCESS_DENIED)
+		access_req &= ~SET_MINIMUM_RIGHTS;
+
+	pntace->access_req = cpu_to_le32(access_req);
+
+	pntace->sid.revision = psid->revision;
+	pntace->sid.num_subauth = psid->num_subauth;
+	for (i = 0; i < NUM_AUTHS; i++)
+		pntace->sid.authority[i] = psid->authority[i];
+	for (i = 0; i < psid->num_subauth; i++)
+		pntace->sid.sub_auth[i] = psid->sub_auth[i];
+
+	size = 1 + 1 + 2 + 4 + 1 + 1 + 6 + (psid->num_subauth * 4);
+	pntace->size = cpu_to_le16(size);
+
+	return size;
+}
+
+
+#ifdef CONFIG_CIFS_DEBUG2
+static void dump_ace(struct cifs_ace *pace, char *end_of_acl)
+{
+	int num_subauth;
+
+	/* validate that we do not go past end of acl */
+
+	if (le16_to_cpu(pace->size) < 16) {
+		cifs_dbg(VFS, "ACE too small %d\n", le16_to_cpu(pace->size));
+		return;
+	}
+
+	if (end_of_acl < (char *)pace + le16_to_cpu(pace->size)) {
+		cifs_dbg(VFS, "ACL too small to parse ACE\n");
+		return;
+	}
+
+	num_subauth = pace->sid.num_subauth;
+	if (num_subauth) {
+		int i;
+		cifs_dbg(FYI, "ACE revision %d num_auth %d type %d flags %d size %d\n",
+			 pace->sid.revision, pace->sid.num_subauth, pace->type,
+			 pace->flags, le16_to_cpu(pace->size));
+		for (i = 0; i < num_subauth; ++i) {
+			cifs_dbg(FYI, "ACE sub_auth[%d]: 0x%x\n",
+				 i, le32_to_cpu(pace->sid.sub_auth[i]));
+		}
+
+		/* BB add length check to make sure that we do not have huge
+			num auths and therefore go off the end */
+	}
+
+	return;
+}
+#endif
+
+static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl,
+		       struct cifs_sid *pownersid, struct cifs_sid *pgrpsid,
+		       struct cifs_fattr *fattr, bool mode_from_special_sid)
+{
+	int i;
+	int num_aces = 0;
+	int acl_size;
+	char *acl_base;
+	struct cifs_ace **ppace;
+
+	/* BB need to add parm so we can store the SID BB */
+
+	if (!pdacl) {
+		/* no DACL in the security descriptor, set
+		   all the permissions for user/group/other */
+		fattr->cf_mode |= 0777;
+		return;
+	}
+
+	/* validate that we do not go past end of acl */
+	if (end_of_acl < (char *)pdacl + le16_to_cpu(pdacl->size)) {
+		cifs_dbg(VFS, "ACL too small to parse DACL\n");
+		return;
+	}
+
+	cifs_dbg(NOISY, "DACL revision %d size %d num aces %d\n",
+		 le16_to_cpu(pdacl->revision), le16_to_cpu(pdacl->size),
+		 le32_to_cpu(pdacl->num_aces));
+
+	/* reset rwx permissions for user/group/other.
+	   Also, if num_aces is 0 i.e. DACL has no ACEs,
+	   user/group/other have no permissions */
+	fattr->cf_mode &= ~(0777);
+
+	acl_base = (char *)pdacl;
+	acl_size = sizeof(struct cifs_acl);
+
+	num_aces = le32_to_cpu(pdacl->num_aces);
+	if (num_aces > 0) {
+		umode_t denied_mode = 0;
+
+		if (num_aces > ULONG_MAX / sizeof(struct cifs_ace *))
+			return;
+		ppace = kmalloc_array(num_aces, sizeof(struct cifs_ace *),
+				      GFP_KERNEL);
+		if (!ppace)
+			return;
+
+		for (i = 0; i < num_aces; ++i) {
+			ppace[i] = (struct cifs_ace *) (acl_base + acl_size);
+#ifdef CONFIG_CIFS_DEBUG2
+			dump_ace(ppace[i], end_of_acl);
+#endif
+			if (mode_from_special_sid &&
+			    (compare_sids(&(ppace[i]->sid),
+					  &sid_unix_NFS_mode) == 0)) {
+				/*
+				 * Full permissions are:
+				 * 07777 = S_ISUID | S_ISGID | S_ISVTX |
+				 *         S_IRWXU | S_IRWXG | S_IRWXO
+				 */
+				fattr->cf_mode &= ~07777;
+				fattr->cf_mode |=
+					le32_to_cpu(ppace[i]->sid.sub_auth[2]);
+				break;
+			} else {
+				if (compare_sids(&(ppace[i]->sid), pownersid) == 0) {
+					access_flags_to_mode(ppace[i]->access_req,
+							ppace[i]->type,
+							&fattr->cf_mode,
+							&denied_mode,
+							ACL_OWNER_MASK);
+				} else if (compare_sids(&(ppace[i]->sid), pgrpsid) == 0) {
+					access_flags_to_mode(ppace[i]->access_req,
+							ppace[i]->type,
+							&fattr->cf_mode,
+							&denied_mode,
+							ACL_GROUP_MASK);
+				} else if ((compare_sids(&(ppace[i]->sid), &sid_everyone) == 0) ||
+						(compare_sids(&(ppace[i]->sid), &sid_authusers) == 0)) {
+					access_flags_to_mode(ppace[i]->access_req,
+							ppace[i]->type,
+							&fattr->cf_mode,
+							&denied_mode,
+							ACL_EVERYONE_MASK);
+				}
+			}
+
+
+/*			memcpy((void *)(&(cifscred->aces[i])),
+				(void *)ppace[i],
+				sizeof(struct cifs_ace)); */
+
+			acl_base = (char *)ppace[i];
+			acl_size = le16_to_cpu(ppace[i]->size);
+		}
+
+		kfree(ppace);
+	}
+
+	return;
+}
+
+unsigned int setup_authusers_ACE(struct cifs_ace *pntace)
+{
+	int i;
+	unsigned int ace_size = 20;
+
+	pntace->type = ACCESS_ALLOWED_ACE_TYPE;
+	pntace->flags = 0x0;
+	pntace->access_req = cpu_to_le32(GENERIC_ALL);
+	pntace->sid.num_subauth = 1;
+	pntace->sid.revision = 1;
+	for (i = 0; i < NUM_AUTHS; i++)
+		pntace->sid.authority[i] =  sid_authusers.authority[i];
+
+	pntace->sid.sub_auth[0] =  sid_authusers.sub_auth[0];
+
+	/* size = 1 + 1 + 2 + 4 + 1 + 1 + 6 + (psid->num_subauth*4) */
+	pntace->size = cpu_to_le16(ace_size);
+	return ace_size;
+}
+
+/*
+ * Fill in the special SID based on the mode. See
+ * https://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx
+ */
+unsigned int setup_special_mode_ACE(struct cifs_ace *pntace, __u64 nmode)
+{
+	int i;
+	unsigned int ace_size = 28;
+
+	pntace->type = ACCESS_DENIED_ACE_TYPE;
+	pntace->flags = 0x0;
+	pntace->access_req = 0;
+	pntace->sid.num_subauth = 3;
+	pntace->sid.revision = 1;
+	for (i = 0; i < NUM_AUTHS; i++)
+		pntace->sid.authority[i] = sid_unix_NFS_mode.authority[i];
+
+	pntace->sid.sub_auth[0] = sid_unix_NFS_mode.sub_auth[0];
+	pntace->sid.sub_auth[1] = sid_unix_NFS_mode.sub_auth[1];
+	pntace->sid.sub_auth[2] = cpu_to_le32(nmode & 07777);
+
+	/* size = 1 + 1 + 2 + 4 + 1 + 1 + 6 + (psid->num_subauth*4) */
+	pntace->size = cpu_to_le16(ace_size);
+	return ace_size;
+}
+
+unsigned int setup_special_user_owner_ACE(struct cifs_ace *pntace)
+{
+	int i;
+	unsigned int ace_size = 28;
+
+	pntace->type = ACCESS_ALLOWED_ACE_TYPE;
+	pntace->flags = 0x0;
+	pntace->access_req = cpu_to_le32(GENERIC_ALL);
+	pntace->sid.num_subauth = 3;
+	pntace->sid.revision = 1;
+	for (i = 0; i < NUM_AUTHS; i++)
+		pntace->sid.authority[i] = sid_unix_NFS_users.authority[i];
+
+	pntace->sid.sub_auth[0] = sid_unix_NFS_users.sub_auth[0];
+	pntace->sid.sub_auth[1] = sid_unix_NFS_users.sub_auth[1];
+	pntace->sid.sub_auth[2] = cpu_to_le32(current_fsgid().val);
+
+	/* size = 1 + 1 + 2 + 4 + 1 + 1 + 6 + (psid->num_subauth*4) */
+	pntace->size = cpu_to_le16(ace_size);
+	return ace_size;
+}
+
+static void populate_new_aces(char *nacl_base,
+		struct cifs_sid *pownersid,
+		struct cifs_sid *pgrpsid,
+		__u64 *pnmode, u32 *pnum_aces, u16 *pnsize,
+		bool modefromsid)
+{
+	__u64 nmode;
+	u32 num_aces = 0;
+	u16 nsize = 0;
+	__u64 user_mode;
+	__u64 group_mode;
+	__u64 other_mode;
+	__u64 deny_user_mode = 0;
+	__u64 deny_group_mode = 0;
+	bool sticky_set = false;
+	struct cifs_ace *pnntace = NULL;
+
+	nmode = *pnmode;
+	num_aces = *pnum_aces;
+	nsize = *pnsize;
+
+	if (modefromsid) {
+		pnntace = (struct cifs_ace *) (nacl_base + nsize);
+		nsize += setup_special_mode_ACE(pnntace, nmode);
+		num_aces++;
+		pnntace = (struct cifs_ace *) (nacl_base + nsize);
+		nsize += setup_authusers_ACE(pnntace);
+		num_aces++;
+		goto set_size;
+	}
+
+	/*
+	 * We'll try to keep the mode as requested by the user.
+	 * But in cases where we cannot meaningfully convert that
+	 * into ACL, return back the updated mode, so that it is
+	 * updated in the inode.
+	 */
+
+	if (!memcmp(pownersid, pgrpsid, sizeof(struct cifs_sid))) {
+		/*
+		 * Case when owner and group SIDs are the same.
+		 * Set the more restrictive of the two modes.
+		 */
+		user_mode = nmode & (nmode << 3) & 0700;
+		group_mode = nmode & (nmode >> 3) & 0070;
+	} else {
+		user_mode = nmode & 0700;
+		group_mode = nmode & 0070;
+	}
+
+	other_mode = nmode & 0007;
+
+	/* We need DENY ACE when the perm is more restrictive than the next sets. */
+	deny_user_mode = ~(user_mode) & ((group_mode << 3) | (other_mode << 6)) & 0700;
+	deny_group_mode = ~(group_mode) & (other_mode << 3) & 0070;
+
+	*pnmode = user_mode | group_mode | other_mode | (nmode & ~0777);
+
+	/* This tells if we should allow delete child for group and everyone. */
+	if (nmode & 01000)
+		sticky_set = true;
+
+	if (deny_user_mode) {
+		pnntace = (struct cifs_ace *) (nacl_base + nsize);
+		nsize += fill_ace_for_sid(pnntace, pownersid, deny_user_mode,
+				0700, ACCESS_DENIED, false);
+		num_aces++;
+	}
+
+	/* Group DENY ACE does not conflict with owner ALLOW ACE. Keep in preferred order*/
+	if (deny_group_mode && !(deny_group_mode & (user_mode >> 3))) {
+		pnntace = (struct cifs_ace *) (nacl_base + nsize);
+		nsize += fill_ace_for_sid(pnntace, pgrpsid, deny_group_mode,
+				0070, ACCESS_DENIED, false);
+		num_aces++;
+	}
+
+	pnntace = (struct cifs_ace *) (nacl_base + nsize);
+	nsize += fill_ace_for_sid(pnntace, pownersid, user_mode,
+			0700, ACCESS_ALLOWED, true);
+	num_aces++;
+
+	/* Group DENY ACE conflicts with owner ALLOW ACE. So keep it after. */
+	if (deny_group_mode && (deny_group_mode & (user_mode >> 3))) {
+		pnntace = (struct cifs_ace *) (nacl_base + nsize);
+		nsize += fill_ace_for_sid(pnntace, pgrpsid, deny_group_mode,
+				0070, ACCESS_DENIED, false);
+		num_aces++;
+	}
+
+	pnntace = (struct cifs_ace *) (nacl_base + nsize);
+	nsize += fill_ace_for_sid(pnntace, pgrpsid, group_mode,
+			0070, ACCESS_ALLOWED, !sticky_set);
+	num_aces++;
+
+	pnntace = (struct cifs_ace *) (nacl_base + nsize);
+	nsize += fill_ace_for_sid(pnntace, &sid_everyone, other_mode,
+			0007, ACCESS_ALLOWED, !sticky_set);
+	num_aces++;
+
+set_size:
+	*pnum_aces = num_aces;
+	*pnsize = nsize;
+}
+
+static __u16 replace_sids_and_copy_aces(struct cifs_acl *pdacl, struct cifs_acl *pndacl,
+		struct cifs_sid *pownersid, struct cifs_sid *pgrpsid,
+		struct cifs_sid *pnownersid, struct cifs_sid *pngrpsid)
+{
+	int i;
+	u16 size = 0;
+	struct cifs_ace *pntace = NULL;
+	char *acl_base = NULL;
+	u32 src_num_aces = 0;
+	u16 nsize = 0;
+	struct cifs_ace *pnntace = NULL;
+	char *nacl_base = NULL;
+	u16 ace_size = 0;
+
+	acl_base = (char *)pdacl;
+	size = sizeof(struct cifs_acl);
+	src_num_aces = le32_to_cpu(pdacl->num_aces);
+
+	nacl_base = (char *)pndacl;
+	nsize = sizeof(struct cifs_acl);
+
+	/* Go through all the ACEs */
+	for (i = 0; i < src_num_aces; ++i) {
+		pntace = (struct cifs_ace *) (acl_base + size);
+		pnntace = (struct cifs_ace *) (nacl_base + nsize);
+
+		if (pnownersid && compare_sids(&pntace->sid, pownersid) == 0)
+			ace_size = cifs_copy_ace(pnntace, pntace, pnownersid);
+		else if (pngrpsid && compare_sids(&pntace->sid, pgrpsid) == 0)
+			ace_size = cifs_copy_ace(pnntace, pntace, pngrpsid);
+		else
+			ace_size = cifs_copy_ace(pnntace, pntace, NULL);
+
+		size += le16_to_cpu(pntace->size);
+		nsize += ace_size;
+	}
+
+	return nsize;
+}
+
+static int set_chmod_dacl(struct cifs_acl *pdacl, struct cifs_acl *pndacl,
+		struct cifs_sid *pownersid,	struct cifs_sid *pgrpsid,
+		__u64 *pnmode, bool mode_from_sid)
+{
+	int i;
+	u16 size = 0;
+	struct cifs_ace *pntace = NULL;
+	char *acl_base = NULL;
+	u32 src_num_aces = 0;
+	u16 nsize = 0;
+	struct cifs_ace *pnntace = NULL;
+	char *nacl_base = NULL;
+	u32 num_aces = 0;
+	bool new_aces_set = false;
+
+	/* Assuming that pndacl and pnmode are never NULL */
+	nacl_base = (char *)pndacl;
+	nsize = sizeof(struct cifs_acl);
+
+	/* If pdacl is NULL, we don't have a src. Simply populate new ACL. */
+	if (!pdacl) {
+		populate_new_aces(nacl_base,
+				pownersid, pgrpsid,
+				pnmode, &num_aces, &nsize,
+				mode_from_sid);
+		goto finalize_dacl;
+	}
+
+	acl_base = (char *)pdacl;
+	size = sizeof(struct cifs_acl);
+	src_num_aces = le32_to_cpu(pdacl->num_aces);
+
+	/* Retain old ACEs which we can retain */
+	for (i = 0; i < src_num_aces; ++i) {
+		pntace = (struct cifs_ace *) (acl_base + size);
+
+		if (!new_aces_set && (pntace->flags & INHERITED_ACE)) {
+			/* Place the new ACEs in between existing explicit and inherited */
+			populate_new_aces(nacl_base,
+					pownersid, pgrpsid,
+					pnmode, &num_aces, &nsize,
+					mode_from_sid);
+
+			new_aces_set = true;
+		}
+
+		/* If it's any one of the ACE we're replacing, skip! */
+		if (((compare_sids(&pntace->sid, &sid_unix_NFS_mode) == 0) ||
+				(compare_sids(&pntace->sid, pownersid) == 0) ||
+				(compare_sids(&pntace->sid, pgrpsid) == 0) ||
+				(compare_sids(&pntace->sid, &sid_everyone) == 0) ||
+				(compare_sids(&pntace->sid, &sid_authusers) == 0))) {
+			goto next_ace;
+		}
+
+		/* update the pointer to the next ACE to populate*/
+		pnntace = (struct cifs_ace *) (nacl_base + nsize);
+
+		nsize += cifs_copy_ace(pnntace, pntace, NULL);
+		num_aces++;
+
+next_ace:
+		size += le16_to_cpu(pntace->size);
+	}
+
+	/* If inherited ACEs are not present, place the new ones at the tail */
+	if (!new_aces_set) {
+		populate_new_aces(nacl_base,
+				pownersid, pgrpsid,
+				pnmode, &num_aces, &nsize,
+				mode_from_sid);
+
+		new_aces_set = true;
+	}
+
+finalize_dacl:
+	pndacl->num_aces = cpu_to_le32(num_aces);
+	pndacl->size = cpu_to_le16(nsize);
+
+	return 0;
+}
+
+static int parse_sid(struct cifs_sid *psid, char *end_of_acl)
+{
+	/* BB need to add parm so we can store the SID BB */
+
+	/* validate that we do not go past end of ACL - sid must be at least 8
+	   bytes long (assuming no sub-auths - e.g. the null SID */
+	if (end_of_acl < (char *)psid + 8) {
+		cifs_dbg(VFS, "ACL too small to parse SID %p\n", psid);
+		return -EINVAL;
+	}
+
+#ifdef CONFIG_CIFS_DEBUG2
+	if (psid->num_subauth) {
+		int i;
+		cifs_dbg(FYI, "SID revision %d num_auth %d\n",
+			 psid->revision, psid->num_subauth);
+
+		for (i = 0; i < psid->num_subauth; i++) {
+			cifs_dbg(FYI, "SID sub_auth[%d]: 0x%x\n",
+				 i, le32_to_cpu(psid->sub_auth[i]));
+		}
+
+		/* BB add length check to make sure that we do not have huge
+			num auths and therefore go off the end */
+		cifs_dbg(FYI, "RID 0x%x\n",
+			 le32_to_cpu(psid->sub_auth[psid->num_subauth-1]));
+	}
+#endif
+
+	return 0;
+}
+
+
+/* Convert CIFS ACL to POSIX form */
+static int parse_sec_desc(struct cifs_sb_info *cifs_sb,
+		struct cifs_ntsd *pntsd, int acl_len, struct cifs_fattr *fattr,
+		bool get_mode_from_special_sid)
+{
+	int rc = 0;
+	struct cifs_sid *owner_sid_ptr, *group_sid_ptr;
+	struct cifs_acl *dacl_ptr; /* no need for SACL ptr */
+	char *end_of_acl = ((char *)pntsd) + acl_len;
+	__u32 dacloffset;
+
+	if (pntsd == NULL)
+		return -EIO;
+
+	owner_sid_ptr = (struct cifs_sid *)((char *)pntsd +
+				le32_to_cpu(pntsd->osidoffset));
+	group_sid_ptr = (struct cifs_sid *)((char *)pntsd +
+				le32_to_cpu(pntsd->gsidoffset));
+	dacloffset = le32_to_cpu(pntsd->dacloffset);
+	dacl_ptr = (struct cifs_acl *)((char *)pntsd + dacloffset);
+	cifs_dbg(NOISY, "revision %d type 0x%x ooffset 0x%x goffset 0x%x sacloffset 0x%x dacloffset 0x%x\n",
+		 pntsd->revision, pntsd->type, le32_to_cpu(pntsd->osidoffset),
+		 le32_to_cpu(pntsd->gsidoffset),
+		 le32_to_cpu(pntsd->sacloffset), dacloffset);
+/*	cifs_dump_mem("owner_sid: ", owner_sid_ptr, 64); */
+	rc = parse_sid(owner_sid_ptr, end_of_acl);
+	if (rc) {
+		cifs_dbg(FYI, "%s: Error %d parsing Owner SID\n", __func__, rc);
+		return rc;
+	}
+	rc = sid_to_id(cifs_sb, owner_sid_ptr, fattr, SIDOWNER);
+	if (rc) {
+		cifs_dbg(FYI, "%s: Error %d mapping Owner SID to uid\n",
+			 __func__, rc);
+		return rc;
+	}
+
+	rc = parse_sid(group_sid_ptr, end_of_acl);
+	if (rc) {
+		cifs_dbg(FYI, "%s: Error %d mapping Owner SID to gid\n",
+			 __func__, rc);
+		return rc;
+	}
+	rc = sid_to_id(cifs_sb, group_sid_ptr, fattr, SIDGROUP);
+	if (rc) {
+		cifs_dbg(FYI, "%s: Error %d mapping Group SID to gid\n",
+			 __func__, rc);
+		return rc;
+	}
+
+	if (dacloffset)
+		parse_dacl(dacl_ptr, end_of_acl, owner_sid_ptr,
+			   group_sid_ptr, fattr, get_mode_from_special_sid);
+	else
+		cifs_dbg(FYI, "no ACL\n"); /* BB grant all or default perms? */
+
+	return rc;
+}
+
+/* Convert permission bits from mode to equivalent CIFS ACL */
+static int build_sec_desc(struct cifs_ntsd *pntsd, struct cifs_ntsd *pnntsd,
+	__u32 secdesclen, __u32 *pnsecdesclen, __u64 *pnmode, kuid_t uid, kgid_t gid,
+	bool mode_from_sid, bool id_from_sid, int *aclflag)
+{
+	int rc = 0;
+	__u32 dacloffset;
+	__u32 ndacloffset;
+	__u32 sidsoffset;
+	struct cifs_sid *owner_sid_ptr, *group_sid_ptr;
+	struct cifs_sid *nowner_sid_ptr = NULL, *ngroup_sid_ptr = NULL;
+	struct cifs_acl *dacl_ptr = NULL;  /* no need for SACL ptr */
+	struct cifs_acl *ndacl_ptr = NULL; /* no need for SACL ptr */
+	char *end_of_acl = ((char *)pntsd) + secdesclen;
+	u16 size = 0;
+
+	dacloffset = le32_to_cpu(pntsd->dacloffset);
+	if (dacloffset) {
+		dacl_ptr = (struct cifs_acl *)((char *)pntsd + dacloffset);
+		if (end_of_acl < (char *)dacl_ptr + le16_to_cpu(dacl_ptr->size)) {
+			cifs_dbg(VFS, "Server returned illegal ACL size\n");
+			return -EINVAL;
+		}
+	}
+
+	owner_sid_ptr = (struct cifs_sid *)((char *)pntsd +
+			le32_to_cpu(pntsd->osidoffset));
+	group_sid_ptr = (struct cifs_sid *)((char *)pntsd +
+			le32_to_cpu(pntsd->gsidoffset));
+
+	if (pnmode && *pnmode != NO_CHANGE_64) { /* chmod */
+		ndacloffset = sizeof(struct cifs_ntsd);
+		ndacl_ptr = (struct cifs_acl *)((char *)pnntsd + ndacloffset);
+		ndacl_ptr->revision =
+			dacloffset ? dacl_ptr->revision : cpu_to_le16(ACL_REVISION);
+
+		ndacl_ptr->size = cpu_to_le16(0);
+		ndacl_ptr->num_aces = cpu_to_le32(0);
+
+		rc = set_chmod_dacl(dacl_ptr, ndacl_ptr, owner_sid_ptr, group_sid_ptr,
+				    pnmode, mode_from_sid);
+
+		sidsoffset = ndacloffset + le16_to_cpu(ndacl_ptr->size);
+		/* copy the non-dacl portion of secdesc */
+		*pnsecdesclen = copy_sec_desc(pntsd, pnntsd, sidsoffset,
+				NULL, NULL);
+
+		*aclflag |= CIFS_ACL_DACL;
+	} else {
+		ndacloffset = sizeof(struct cifs_ntsd);
+		ndacl_ptr = (struct cifs_acl *)((char *)pnntsd + ndacloffset);
+		ndacl_ptr->revision =
+			dacloffset ? dacl_ptr->revision : cpu_to_le16(ACL_REVISION);
+		ndacl_ptr->num_aces = dacl_ptr ? dacl_ptr->num_aces : 0;
+
+		if (uid_valid(uid)) { /* chown */
+			uid_t id;
+			nowner_sid_ptr = kzalloc(sizeof(struct cifs_sid),
+								GFP_KERNEL);
+			if (!nowner_sid_ptr) {
+				rc = -ENOMEM;
+				goto chown_chgrp_exit;
+			}
+			id = from_kuid(&init_user_ns, uid);
+			if (id_from_sid) {
+				struct owner_sid *osid = (struct owner_sid *)nowner_sid_ptr;
+				/* Populate the user ownership fields S-1-5-88-1 */
+				osid->Revision = 1;
+				osid->NumAuth = 3;
+				osid->Authority[5] = 5;
+				osid->SubAuthorities[0] = cpu_to_le32(88);
+				osid->SubAuthorities[1] = cpu_to_le32(1);
+				osid->SubAuthorities[2] = cpu_to_le32(id);
+
+			} else { /* lookup sid with upcall */
+				rc = id_to_sid(id, SIDOWNER, nowner_sid_ptr);
+				if (rc) {
+					cifs_dbg(FYI, "%s: Mapping error %d for owner id %d\n",
+						 __func__, rc, id);
+					goto chown_chgrp_exit;
+				}
+			}
+			*aclflag |= CIFS_ACL_OWNER;
+		}
+		if (gid_valid(gid)) { /* chgrp */
+			gid_t id;
+			ngroup_sid_ptr = kzalloc(sizeof(struct cifs_sid),
+								GFP_KERNEL);
+			if (!ngroup_sid_ptr) {
+				rc = -ENOMEM;
+				goto chown_chgrp_exit;
+			}
+			id = from_kgid(&init_user_ns, gid);
+			if (id_from_sid) {
+				struct owner_sid *gsid = (struct owner_sid *)ngroup_sid_ptr;
+				/* Populate the group ownership fields S-1-5-88-2 */
+				gsid->Revision = 1;
+				gsid->NumAuth = 3;
+				gsid->Authority[5] = 5;
+				gsid->SubAuthorities[0] = cpu_to_le32(88);
+				gsid->SubAuthorities[1] = cpu_to_le32(2);
+				gsid->SubAuthorities[2] = cpu_to_le32(id);
+
+			} else { /* lookup sid with upcall */
+				rc = id_to_sid(id, SIDGROUP, ngroup_sid_ptr);
+				if (rc) {
+					cifs_dbg(FYI, "%s: Mapping error %d for group id %d\n",
+						 __func__, rc, id);
+					goto chown_chgrp_exit;
+				}
+			}
+			*aclflag |= CIFS_ACL_GROUP;
+		}
+
+		if (dacloffset) {
+			/* Replace ACEs for old owner with new one */
+			size = replace_sids_and_copy_aces(dacl_ptr, ndacl_ptr,
+					owner_sid_ptr, group_sid_ptr,
+					nowner_sid_ptr, ngroup_sid_ptr);
+			ndacl_ptr->size = cpu_to_le16(size);
+		}
+
+		sidsoffset = ndacloffset + le16_to_cpu(ndacl_ptr->size);
+		/* copy the non-dacl portion of secdesc */
+		*pnsecdesclen = copy_sec_desc(pntsd, pnntsd, sidsoffset,
+				nowner_sid_ptr, ngroup_sid_ptr);
+
+chown_chgrp_exit:
+		/* errors could jump here. So make sure we return soon after this */
+		kfree(nowner_sid_ptr);
+		kfree(ngroup_sid_ptr);
+	}
+
+	return rc;
+}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+struct cifs_ntsd *get_cifs_acl_by_fid(struct cifs_sb_info *cifs_sb,
+				      const struct cifs_fid *cifsfid, u32 *pacllen,
+				      u32 __maybe_unused unused)
+{
+	struct cifs_ntsd *pntsd = NULL;
+	unsigned int xid;
+	int rc;
+	struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
+
+	if (IS_ERR(tlink))
+		return ERR_CAST(tlink);
+
+	xid = get_xid();
+	rc = CIFSSMBGetCIFSACL(xid, tlink_tcon(tlink), cifsfid->netfid, &pntsd,
+				pacllen);
+	free_xid(xid);
+
+	cifs_put_tlink(tlink);
+
+	cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
+	if (rc)
+		return ERR_PTR(rc);
+	return pntsd;
+}
+
+static struct cifs_ntsd *get_cifs_acl_by_path(struct cifs_sb_info *cifs_sb,
+		const char *path, u32 *pacllen)
+{
+	struct cifs_ntsd *pntsd = NULL;
+	int oplock = 0;
+	unsigned int xid;
+	int rc;
+	struct cifs_tcon *tcon;
+	struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
+	struct cifs_fid fid;
+	struct cifs_open_parms oparms;
+
+	if (IS_ERR(tlink))
+		return ERR_CAST(tlink);
+
+	tcon = tlink_tcon(tlink);
+	xid = get_xid();
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.cifs_sb = cifs_sb,
+		.desired_access = READ_CONTROL,
+		.create_options = cifs_create_options(cifs_sb, 0),
+		.disposition = FILE_OPEN,
+		.path = path,
+		.fid = &fid,
+	};
+
+	rc = CIFS_open(xid, &oparms, &oplock, NULL);
+	if (!rc) {
+		rc = CIFSSMBGetCIFSACL(xid, tcon, fid.netfid, &pntsd, pacllen);
+		CIFSSMBClose(xid, tcon, fid.netfid);
+	}
+
+	cifs_put_tlink(tlink);
+	free_xid(xid);
+
+	cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
+	if (rc)
+		return ERR_PTR(rc);
+	return pntsd;
+}
+
+/* Retrieve an ACL from the server */
+struct cifs_ntsd *get_cifs_acl(struct cifs_sb_info *cifs_sb,
+				      struct inode *inode, const char *path,
+			       u32 *pacllen, u32 info)
+{
+	struct cifs_ntsd *pntsd = NULL;
+	struct cifsFileInfo *open_file = NULL;
+
+	if (inode)
+		open_file = find_readable_file(CIFS_I(inode), true);
+	if (!open_file)
+		return get_cifs_acl_by_path(cifs_sb, path, pacllen);
+
+	pntsd = get_cifs_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
+	cifsFileInfo_put(open_file);
+	return pntsd;
+}
+
+ /* Set an ACL on the server */
+int set_cifs_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
+			struct inode *inode, const char *path, int aclflag)
+{
+	int oplock = 0;
+	unsigned int xid;
+	int rc, access_flags;
+	struct cifs_tcon *tcon;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
+	struct cifs_fid fid;
+	struct cifs_open_parms oparms;
+
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+
+	tcon = tlink_tcon(tlink);
+	xid = get_xid();
+
+	if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
+		access_flags = WRITE_OWNER;
+	else
+		access_flags = WRITE_DAC;
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.cifs_sb = cifs_sb,
+		.desired_access = access_flags,
+		.create_options = cifs_create_options(cifs_sb, 0),
+		.disposition = FILE_OPEN,
+		.path = path,
+		.fid = &fid,
+	};
+
+	rc = CIFS_open(xid, &oparms, &oplock, NULL);
+	if (rc) {
+		cifs_dbg(VFS, "Unable to open file to set ACL\n");
+		goto out;
+	}
+
+	rc = CIFSSMBSetCIFSACL(xid, tcon, fid.netfid, pnntsd, acllen, aclflag);
+	cifs_dbg(NOISY, "SetCIFSACL rc = %d\n", rc);
+
+	CIFSSMBClose(xid, tcon, fid.netfid);
+out:
+	free_xid(xid);
+	cifs_put_tlink(tlink);
+	return rc;
+}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+/* Translate the CIFS ACL (similar to NTFS ACL) for a file into mode bits */
+int
+cifs_acl_to_fattr(struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr,
+		  struct inode *inode, bool mode_from_special_sid,
+		  const char *path, const struct cifs_fid *pfid)
+{
+	struct cifs_ntsd *pntsd = NULL;
+	u32 acllen = 0;
+	int rc = 0;
+	struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
+	struct smb_version_operations *ops;
+	const u32 info = 0;
+
+	cifs_dbg(NOISY, "converting ACL to mode for %s\n", path);
+
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+
+	ops = tlink_tcon(tlink)->ses->server->ops;
+
+	if (pfid && (ops->get_acl_by_fid))
+		pntsd = ops->get_acl_by_fid(cifs_sb, pfid, &acllen, info);
+	else if (ops->get_acl)
+		pntsd = ops->get_acl(cifs_sb, inode, path, &acllen, info);
+	else {
+		cifs_put_tlink(tlink);
+		return -EOPNOTSUPP;
+	}
+	/* if we can retrieve the ACL, now parse Access Control Entries, ACEs */
+	if (IS_ERR(pntsd)) {
+		rc = PTR_ERR(pntsd);
+		cifs_dbg(VFS, "%s: error %d getting sec desc\n", __func__, rc);
+	} else if (mode_from_special_sid) {
+		rc = parse_sec_desc(cifs_sb, pntsd, acllen, fattr, true);
+		kfree(pntsd);
+	} else {
+		/* get approximated mode from ACL */
+		rc = parse_sec_desc(cifs_sb, pntsd, acllen, fattr, false);
+		kfree(pntsd);
+		if (rc)
+			cifs_dbg(VFS, "parse sec desc failed rc = %d\n", rc);
+	}
+
+	cifs_put_tlink(tlink);
+
+	return rc;
+}
+
+/* Convert mode bits to an ACL so we can update the ACL on the server */
+int
+id_mode_to_cifs_acl(struct inode *inode, const char *path, __u64 *pnmode,
+			kuid_t uid, kgid_t gid)
+{
+	int rc = 0;
+	int aclflag = CIFS_ACL_DACL; /* default flag to set */
+	__u32 secdesclen = 0;
+	__u32 nsecdesclen = 0;
+	__u32 dacloffset = 0;
+	struct cifs_acl *dacl_ptr = NULL;
+	struct cifs_ntsd *pntsd = NULL; /* acl obtained from server */
+	struct cifs_ntsd *pnntsd = NULL; /* modified acl to be sent to server */
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
+	struct smb_version_operations *ops;
+	bool mode_from_sid, id_from_sid;
+	const u32 info = 0;
+
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+
+	ops = tlink_tcon(tlink)->ses->server->ops;
+
+	cifs_dbg(NOISY, "set ACL from mode for %s\n", path);
+
+	/* Get the security descriptor */
+
+	if (ops->get_acl == NULL) {
+		cifs_put_tlink(tlink);
+		return -EOPNOTSUPP;
+	}
+
+	pntsd = ops->get_acl(cifs_sb, inode, path, &secdesclen, info);
+	if (IS_ERR(pntsd)) {
+		rc = PTR_ERR(pntsd);
+		cifs_dbg(VFS, "%s: error %d getting sec desc\n", __func__, rc);
+		cifs_put_tlink(tlink);
+		return rc;
+	}
+
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)
+		mode_from_sid = true;
+	else
+		mode_from_sid = false;
+
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL)
+		id_from_sid = true;
+	else
+		id_from_sid = false;
+
+	/* Potentially, five new ACEs can be added to the ACL for U,G,O mapping */
+	nsecdesclen = secdesclen;
+	if (pnmode && *pnmode != NO_CHANGE_64) { /* chmod */
+		if (mode_from_sid)
+			nsecdesclen += 2 * sizeof(struct cifs_ace);
+		else /* cifsacl */
+			nsecdesclen += 5 * sizeof(struct cifs_ace);
+	} else { /* chown */
+		/* When ownership changes, changes new owner sid length could be different */
+		nsecdesclen = sizeof(struct cifs_ntsd) + (sizeof(struct cifs_sid) * 2);
+		dacloffset = le32_to_cpu(pntsd->dacloffset);
+		if (dacloffset) {
+			dacl_ptr = (struct cifs_acl *)((char *)pntsd + dacloffset);
+			if (mode_from_sid)
+				nsecdesclen +=
+					le32_to_cpu(dacl_ptr->num_aces) * sizeof(struct cifs_ace);
+			else /* cifsacl */
+				nsecdesclen += le16_to_cpu(dacl_ptr->size);
+		}
+	}
+
+	/*
+	 * Add three ACEs for owner, group, everyone getting rid of other ACEs
+	 * as chmod disables ACEs and set the security descriptor. Allocate
+	 * memory for the smb header, set security descriptor request security
+	 * descriptor parameters, and security descriptor itself
+	 */
+	nsecdesclen = max_t(u32, nsecdesclen, DEFAULT_SEC_DESC_LEN);
+	pnntsd = kmalloc(nsecdesclen, GFP_KERNEL);
+	if (!pnntsd) {
+		kfree(pntsd);
+		cifs_put_tlink(tlink);
+		return -ENOMEM;
+	}
+
+	rc = build_sec_desc(pntsd, pnntsd, secdesclen, &nsecdesclen, pnmode, uid, gid,
+			    mode_from_sid, id_from_sid, &aclflag);
+
+	cifs_dbg(NOISY, "build_sec_desc rc: %d\n", rc);
+
+	if (ops->set_acl == NULL)
+		rc = -EOPNOTSUPP;
+
+	if (!rc) {
+		/* Set the security descriptor */
+		rc = ops->set_acl(pnntsd, nsecdesclen, inode, path, aclflag);
+		cifs_dbg(NOISY, "set_cifs_acl rc: %d\n", rc);
+	}
+	cifs_put_tlink(tlink);
+
+	kfree(pnntsd);
+	kfree(pntsd);
+	return rc;
+}
+
+struct posix_acl *cifs_get_acl(struct mnt_idmap *idmap,
+			       struct dentry *dentry, int type)
+{
+#if defined(CONFIG_CIFS_ALLOW_INSECURE_LEGACY) && defined(CONFIG_CIFS_POSIX)
+	struct posix_acl *acl = NULL;
+	ssize_t rc = -EOPNOTSUPP;
+	unsigned int xid;
+	struct super_block *sb = dentry->d_sb;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	struct tcon_link *tlink;
+	struct cifs_tcon *pTcon;
+	const char *full_path;
+	void *page;
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink))
+		return ERR_CAST(tlink);
+	pTcon = tlink_tcon(tlink);
+
+	xid = get_xid();
+	page = alloc_dentry_path();
+
+	full_path = build_path_from_dentry(dentry, page);
+	if (IS_ERR(full_path)) {
+		acl = ERR_CAST(full_path);
+		goto out;
+	}
+
+	/* return alt name if available as pseudo attr */
+	switch (type) {
+	case ACL_TYPE_ACCESS:
+		if (sb->s_flags & SB_POSIXACL)
+			rc = cifs_do_get_acl(xid, pTcon, full_path, &acl,
+					     ACL_TYPE_ACCESS,
+					     cifs_sb->local_nls,
+					     cifs_remap(cifs_sb));
+		break;
+
+	case ACL_TYPE_DEFAULT:
+		if (sb->s_flags & SB_POSIXACL)
+			rc = cifs_do_get_acl(xid, pTcon, full_path, &acl,
+					     ACL_TYPE_DEFAULT,
+					     cifs_sb->local_nls,
+					     cifs_remap(cifs_sb));
+		break;
+	}
+
+	if (rc < 0) {
+		if (rc == -EINVAL)
+			acl = ERR_PTR(-EOPNOTSUPP);
+		else
+			acl = ERR_PTR(rc);
+	}
+
+out:
+	free_dentry_path(page);
+	free_xid(xid);
+	cifs_put_tlink(tlink);
+	return acl;
+#else
+	return ERR_PTR(-EOPNOTSUPP);
+#endif
+}
+
+int cifs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
+		 struct posix_acl *acl, int type)
+{
+#if defined(CONFIG_CIFS_ALLOW_INSECURE_LEGACY) && defined(CONFIG_CIFS_POSIX)
+	int rc = -EOPNOTSUPP;
+	unsigned int xid;
+	struct super_block *sb = dentry->d_sb;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	struct tcon_link *tlink;
+	struct cifs_tcon *pTcon;
+	const char *full_path;
+	void *page;
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+	pTcon = tlink_tcon(tlink);
+
+	xid = get_xid();
+	page = alloc_dentry_path();
+
+	full_path = build_path_from_dentry(dentry, page);
+	if (IS_ERR(full_path)) {
+		rc = PTR_ERR(full_path);
+		goto out;
+	}
+
+	if (!acl)
+		goto out;
+
+	/* return dos attributes as pseudo xattr */
+	/* return alt name if available as pseudo attr */
+
+	/* if proc/fs/cifs/streamstoxattr is set then
+		search server for EAs or streams to
+		returns as xattrs */
+	if (posix_acl_xattr_size(acl->a_count) > CIFSMaxBufSize) {
+		cifs_dbg(FYI, "size of EA value too large\n");
+		rc = -EOPNOTSUPP;
+		goto out;
+	}
+
+	switch (type) {
+	case ACL_TYPE_ACCESS:
+		if (sb->s_flags & SB_POSIXACL)
+			rc = cifs_do_set_acl(xid, pTcon, full_path, acl,
+					     ACL_TYPE_ACCESS,
+					     cifs_sb->local_nls,
+					     cifs_remap(cifs_sb));
+		break;
+
+	case ACL_TYPE_DEFAULT:
+		if (sb->s_flags & SB_POSIXACL)
+			rc = cifs_do_set_acl(xid, pTcon, full_path, acl,
+					     ACL_TYPE_DEFAULT,
+					     cifs_sb->local_nls,
+					     cifs_remap(cifs_sb));
+		break;
+	}
+
+out:
+	free_dentry_path(page);
+	free_xid(xid);
+	cifs_put_tlink(tlink);
+	return rc;
+#else
+	return -EOPNOTSUPP;
+#endif
+}
diff --git a/fs/smb/client/cifsacl.h b/fs/smb/client/cifsacl.h
new file mode 100644
index 0000000000..ccbfc754bd
--- /dev/null
+++ b/fs/smb/client/cifsacl.h
@@ -0,0 +1,199 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+/*
+ *
+ *   Copyright (c) International Business Machines  Corp., 2007
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ */
+
+#ifndef _CIFSACL_H
+#define _CIFSACL_H
+
+#define NUM_AUTHS (6)	/* number of authority fields */
+#define SID_MAX_SUB_AUTHORITIES (15) /* max number of sub authority fields */
+
+#define READ_BIT        0x4
+#define WRITE_BIT       0x2
+#define EXEC_BIT        0x1
+
+#define ACL_OWNER_MASK 0700
+#define ACL_GROUP_MASK 0070
+#define ACL_EVERYONE_MASK 0007
+
+#define UBITSHIFT	6
+#define GBITSHIFT	3
+
+#define ACCESS_ALLOWED	0
+#define ACCESS_DENIED	1
+
+#define SIDOWNER 1
+#define SIDGROUP 2
+
+/*
+ * Security Descriptor length containing DACL with 3 ACEs (one each for
+ * owner, group and world).
+ */
+#define DEFAULT_SEC_DESC_LEN (sizeof(struct cifs_ntsd) + \
+			      sizeof(struct cifs_acl) + \
+			      (sizeof(struct cifs_ace) * 4))
+
+/*
+ * Maximum size of a string representation of a SID:
+ *
+ * The fields are unsigned values in decimal. So:
+ *
+ * u8:  max 3 bytes in decimal
+ * u32: max 10 bytes in decimal
+ *
+ * "S-" + 3 bytes for version field + 15 for authority field + NULL terminator
+ *
+ * For authority field, max is when all 6 values are non-zero and it must be
+ * represented in hex. So "-0x" + 12 hex digits.
+ *
+ * Add 11 bytes for each subauthority field (10 bytes each + 1 for '-')
+ */
+#define SID_STRING_BASE_SIZE (2 + 3 + 15 + 1)
+#define SID_STRING_SUBAUTH_SIZE (11) /* size of a single subauth string */
+
+struct cifs_ntsd {
+	__le16 revision; /* revision level */
+	__le16 type;
+	__le32 osidoffset;
+	__le32 gsidoffset;
+	__le32 sacloffset;
+	__le32 dacloffset;
+} __attribute__((packed));
+
+struct cifs_sid {
+	__u8 revision; /* revision level */
+	__u8 num_subauth;
+	__u8 authority[NUM_AUTHS];
+	__le32 sub_auth[SID_MAX_SUB_AUTHORITIES]; /* sub_auth[num_subauth] */
+} __attribute__((packed));
+
+/* size of a struct cifs_sid, sans sub_auth array */
+#define CIFS_SID_BASE_SIZE (1 + 1 + NUM_AUTHS)
+
+struct cifs_acl {
+	__le16 revision; /* revision level */
+	__le16 size;
+	__le32 num_aces;
+} __attribute__((packed));
+
+/* ACE types - see MS-DTYP 2.4.4.1 */
+#define ACCESS_ALLOWED_ACE_TYPE	0x00
+#define ACCESS_DENIED_ACE_TYPE	0x01
+#define SYSTEM_AUDIT_ACE_TYPE	0x02
+#define SYSTEM_ALARM_ACE_TYPE	0x03
+#define ACCESS_ALLOWED_COMPOUND_ACE_TYPE 0x04
+#define ACCESS_ALLOWED_OBJECT_ACE_TYPE	0x05
+#define ACCESS_DENIED_OBJECT_ACE_TYPE	0x06
+#define SYSTEM_AUDIT_OBJECT_ACE_TYPE	0x07
+#define SYSTEM_ALARM_OBJECT_ACE_TYPE	0x08
+#define ACCESS_ALLOWED_CALLBACK_ACE_TYPE 0x09
+#define ACCESS_DENIED_CALLBACK_ACE_TYPE	0x0A
+#define ACCESS_ALLOWED_CALLBACK_OBJECT_ACE_TYPE 0x0B
+#define ACCESS_DENIED_CALLBACK_OBJECT_ACE_TYPE  0x0C
+#define SYSTEM_AUDIT_CALLBACK_ACE_TYPE	0x0D
+#define SYSTEM_ALARM_CALLBACK_ACE_TYPE	0x0E /* Reserved */
+#define SYSTEM_AUDIT_CALLBACK_OBJECT_ACE_TYPE 0x0F
+#define SYSTEM_ALARM_CALLBACK_OBJECT_ACE_TYPE 0x10 /* reserved */
+#define SYSTEM_MANDATORY_LABEL_ACE_TYPE	0x11
+#define SYSTEM_RESOURCE_ATTRIBUTE_ACE_TYPE 0x12
+#define SYSTEM_SCOPED_POLICY_ID_ACE_TYPE 0x13
+
+/* ACE flags */
+#define OBJECT_INHERIT_ACE	0x01
+#define CONTAINER_INHERIT_ACE	0x02
+#define NO_PROPAGATE_INHERIT_ACE 0x04
+#define INHERIT_ONLY_ACE	0x08
+#define INHERITED_ACE		0x10
+#define SUCCESSFUL_ACCESS_ACE_FLAG 0x40
+#define FAILED_ACCESS_ACE_FLAG	0x80
+
+struct cifs_ace {
+	__u8 type; /* see above and MS-DTYP 2.4.4.1 */
+	__u8 flags;
+	__le16 size;
+	__le32 access_req;
+	struct cifs_sid sid; /* ie UUID of user or group who gets these perms */
+} __attribute__((packed));
+
+/*
+ * The current SMB3 form of security descriptor is similar to what was used for
+ * cifs (see above) but some fields are split, and fields in the struct below
+ * matches names of fields to the spec, MS-DTYP (see sections 2.4.5 and
+ * 2.4.6). Note that "CamelCase" fields are used in this struct in order to
+ * match the MS-DTYP and MS-SMB2 specs which define the wire format.
+ */
+struct smb3_sd {
+	__u8 Revision; /* revision level, MUST be one */
+	__u8 Sbz1; /* only meaningful if 'RM' flag set below */
+	__le16 Control;
+	__le32 OffsetOwner;
+	__le32 OffsetGroup;
+	__le32 OffsetSacl;
+	__le32 OffsetDacl;
+} __packed;
+
+/* Meaning of 'Control' field flags */
+#define ACL_CONTROL_SR	0x8000	/* Self relative */
+#define ACL_CONTROL_RM	0x4000	/* Resource manager control bits */
+#define ACL_CONTROL_PS	0x2000	/* SACL protected from inherits */
+#define ACL_CONTROL_PD	0x1000	/* DACL protected from inherits */
+#define ACL_CONTROL_SI	0x0800	/* SACL Auto-Inherited */
+#define ACL_CONTROL_DI	0x0400	/* DACL Auto-Inherited */
+#define ACL_CONTROL_SC	0x0200	/* SACL computed through inheritance */
+#define ACL_CONTROL_DC	0x0100	/* DACL computed through inheritence */
+#define ACL_CONTROL_SS	0x0080	/* Create server ACL */
+#define ACL_CONTROL_DT	0x0040	/* DACL provided by trusted source */
+#define ACL_CONTROL_SD	0x0020	/* SACL defaulted */
+#define ACL_CONTROL_SP	0x0010	/* SACL is present on object */
+#define ACL_CONTROL_DD	0x0008	/* DACL defaulted */
+#define ACL_CONTROL_DP	0x0004	/* DACL is present on object */
+#define ACL_CONTROL_GD	0x0002	/* Group was defaulted */
+#define ACL_CONTROL_OD	0x0001	/* User was defaulted */
+
+/* Meaning of AclRevision flags */
+#define ACL_REVISION	0x02 /* See section 2.4.4.1 of MS-DTYP */
+#define ACL_REVISION_DS	0x04 /* Additional AceTypes allowed */
+
+struct smb3_acl {
+	u8 AclRevision; /* revision level */
+	u8 Sbz1; /* MBZ */
+	__le16 AclSize;
+	__le16 AceCount;
+	__le16 Sbz2; /* MBZ */
+} __packed;
+
+/*
+ * Used to store the special 'NFS SIDs' used to persist the POSIX uid and gid
+ * See http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx
+ */
+struct owner_sid {
+	u8 Revision;
+	u8 NumAuth;
+	u8 Authority[6];
+	__le32 SubAuthorities[3];
+} __packed;
+
+struct owner_group_sids {
+	struct owner_sid owner;
+	struct owner_sid group;
+} __packed;
+
+/*
+ * Minimum security identifier can be one for system defined Users
+ * and Groups such as NULL SID and World or Built-in accounts such
+ * as Administrator and Guest and consists of
+ * Revision + Num (Sub)Auths + Authority + Domain (one Subauthority)
+ */
+#define MIN_SID_LEN  (1 + 1 + 6 + 4) /* in bytes */
+
+/*
+ * Minimum security descriptor can be one without any SACL and DACL and can
+ * consist of revision, type, and two sids of minimum size for owner and group
+ */
+#define MIN_SEC_DESC_LEN  (sizeof(struct cifs_ntsd) + (2 * MIN_SID_LEN))
+
+#endif /* _CIFSACL_H */
diff --git a/fs/smb/client/cifsencrypt.c b/fs/smb/client/cifsencrypt.c
new file mode 100644
index 0000000000..ef4c2e3c9f
--- /dev/null
+++ b/fs/smb/client/cifsencrypt.c
@@ -0,0 +1,861 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *
+ *   Encryption and hashing operations relating to NTLM, NTLMv2.  See MS-NLMP
+ *   for more detailed information
+ *
+ *   Copyright (C) International Business Machines  Corp., 2005,2013
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ */
+
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifs_debug.h"
+#include "cifs_unicode.h"
+#include "cifsproto.h"
+#include "ntlmssp.h"
+#include <linux/ctype.h>
+#include <linux/random.h>
+#include <linux/highmem.h>
+#include <linux/fips.h>
+#include "../common/arc4.h"
+#include <crypto/aead.h>
+
+/*
+ * Hash data from a BVEC-type iterator.
+ */
+static int cifs_shash_bvec(const struct iov_iter *iter, ssize_t maxsize,
+			   struct shash_desc *shash)
+{
+	const struct bio_vec *bv = iter->bvec;
+	unsigned long start = iter->iov_offset;
+	unsigned int i;
+	void *p;
+	int ret;
+
+	for (i = 0; i < iter->nr_segs; i++) {
+		size_t off, len;
+
+		len = bv[i].bv_len;
+		if (start >= len) {
+			start -= len;
+			continue;
+		}
+
+		len = min_t(size_t, maxsize, len - start);
+		off = bv[i].bv_offset + start;
+
+		p = kmap_local_page(bv[i].bv_page);
+		ret = crypto_shash_update(shash, p + off, len);
+		kunmap_local(p);
+		if (ret < 0)
+			return ret;
+
+		maxsize -= len;
+		if (maxsize <= 0)
+			break;
+		start = 0;
+	}
+
+	return 0;
+}
+
+/*
+ * Hash data from a KVEC-type iterator.
+ */
+static int cifs_shash_kvec(const struct iov_iter *iter, ssize_t maxsize,
+			   struct shash_desc *shash)
+{
+	const struct kvec *kv = iter->kvec;
+	unsigned long start = iter->iov_offset;
+	unsigned int i;
+	int ret;
+
+	for (i = 0; i < iter->nr_segs; i++) {
+		size_t len;
+
+		len = kv[i].iov_len;
+		if (start >= len) {
+			start -= len;
+			continue;
+		}
+
+		len = min_t(size_t, maxsize, len - start);
+		ret = crypto_shash_update(shash, kv[i].iov_base + start, len);
+		if (ret < 0)
+			return ret;
+		maxsize -= len;
+
+		if (maxsize <= 0)
+			break;
+		start = 0;
+	}
+
+	return 0;
+}
+
+/*
+ * Hash data from an XARRAY-type iterator.
+ */
+static ssize_t cifs_shash_xarray(const struct iov_iter *iter, ssize_t maxsize,
+				 struct shash_desc *shash)
+{
+	struct folio *folios[16], *folio;
+	unsigned int nr, i, j, npages;
+	loff_t start = iter->xarray_start + iter->iov_offset;
+	pgoff_t last, index = start / PAGE_SIZE;
+	ssize_t ret = 0;
+	size_t len, offset, foffset;
+	void *p;
+
+	if (maxsize == 0)
+		return 0;
+
+	last = (start + maxsize - 1) / PAGE_SIZE;
+	do {
+		nr = xa_extract(iter->xarray, (void **)folios, index, last,
+				ARRAY_SIZE(folios), XA_PRESENT);
+		if (nr == 0)
+			return -EIO;
+
+		for (i = 0; i < nr; i++) {
+			folio = folios[i];
+			npages = folio_nr_pages(folio);
+			foffset = start - folio_pos(folio);
+			offset = foffset % PAGE_SIZE;
+			for (j = foffset / PAGE_SIZE; j < npages; j++) {
+				len = min_t(size_t, maxsize, PAGE_SIZE - offset);
+				p = kmap_local_page(folio_page(folio, j));
+				ret = crypto_shash_update(shash, p, len);
+				kunmap_local(p);
+				if (ret < 0)
+					return ret;
+				maxsize -= len;
+				if (maxsize <= 0)
+					return 0;
+				start += len;
+				offset = 0;
+				index++;
+			}
+		}
+	} while (nr == ARRAY_SIZE(folios));
+	return 0;
+}
+
+/*
+ * Pass the data from an iterator into a hash.
+ */
+static int cifs_shash_iter(const struct iov_iter *iter, size_t maxsize,
+			   struct shash_desc *shash)
+{
+	if (maxsize == 0)
+		return 0;
+
+	switch (iov_iter_type(iter)) {
+	case ITER_BVEC:
+		return cifs_shash_bvec(iter, maxsize, shash);
+	case ITER_KVEC:
+		return cifs_shash_kvec(iter, maxsize, shash);
+	case ITER_XARRAY:
+		return cifs_shash_xarray(iter, maxsize, shash);
+	default:
+		pr_err("cifs_shash_iter(%u) unsupported\n", iov_iter_type(iter));
+		WARN_ON_ONCE(1);
+		return -EIO;
+	}
+}
+
+int __cifs_calc_signature(struct smb_rqst *rqst,
+			  struct TCP_Server_Info *server, char *signature,
+			  struct shash_desc *shash)
+{
+	int i;
+	ssize_t rc;
+	struct kvec *iov = rqst->rq_iov;
+	int n_vec = rqst->rq_nvec;
+
+	/* iov[0] is actual data and not the rfc1002 length for SMB2+ */
+	if (!is_smb1(server)) {
+		if (iov[0].iov_len <= 4)
+			return -EIO;
+		i = 0;
+	} else {
+		if (n_vec < 2 || iov[0].iov_len != 4)
+			return -EIO;
+		i = 1; /* skip rfc1002 length */
+	}
+
+	for (; i < n_vec; i++) {
+		if (iov[i].iov_len == 0)
+			continue;
+		if (iov[i].iov_base == NULL) {
+			cifs_dbg(VFS, "null iovec entry\n");
+			return -EIO;
+		}
+
+		rc = crypto_shash_update(shash,
+					 iov[i].iov_base, iov[i].iov_len);
+		if (rc) {
+			cifs_dbg(VFS, "%s: Could not update with payload\n",
+				 __func__);
+			return rc;
+		}
+	}
+
+	rc = cifs_shash_iter(&rqst->rq_iter, iov_iter_count(&rqst->rq_iter), shash);
+	if (rc < 0)
+		return rc;
+
+	rc = crypto_shash_final(shash, signature);
+	if (rc)
+		cifs_dbg(VFS, "%s: Could not generate hash\n", __func__);
+
+	return rc;
+}
+
+/*
+ * Calculate and return the CIFS signature based on the mac key and SMB PDU.
+ * The 16 byte signature must be allocated by the caller. Note we only use the
+ * 1st eight bytes and that the smb header signature field on input contains
+ * the sequence number before this function is called. Also, this function
+ * should be called with the server->srv_mutex held.
+ */
+static int cifs_calc_signature(struct smb_rqst *rqst,
+			struct TCP_Server_Info *server, char *signature)
+{
+	int rc;
+
+	if (!rqst->rq_iov || !signature || !server)
+		return -EINVAL;
+
+	rc = cifs_alloc_hash("md5", &server->secmech.md5);
+	if (rc)
+		return -1;
+
+	rc = crypto_shash_init(server->secmech.md5);
+	if (rc) {
+		cifs_dbg(VFS, "%s: Could not init md5\n", __func__);
+		return rc;
+	}
+
+	rc = crypto_shash_update(server->secmech.md5,
+		server->session_key.response, server->session_key.len);
+	if (rc) {
+		cifs_dbg(VFS, "%s: Could not update with response\n", __func__);
+		return rc;
+	}
+
+	return __cifs_calc_signature(rqst, server, signature, server->secmech.md5);
+}
+
+/* must be called with server->srv_mutex held */
+int cifs_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server,
+		   __u32 *pexpected_response_sequence_number)
+{
+	int rc = 0;
+	char smb_signature[20];
+	struct smb_hdr *cifs_pdu = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
+
+	if (rqst->rq_iov[0].iov_len != 4 ||
+	    rqst->rq_iov[0].iov_base + 4 != rqst->rq_iov[1].iov_base)
+		return -EIO;
+
+	if ((cifs_pdu == NULL) || (server == NULL))
+		return -EINVAL;
+
+	spin_lock(&server->srv_lock);
+	if (!(cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) ||
+	    server->tcpStatus == CifsNeedNegotiate) {
+		spin_unlock(&server->srv_lock);
+		return rc;
+	}
+	spin_unlock(&server->srv_lock);
+
+	if (!server->session_estab) {
+		memcpy(cifs_pdu->Signature.SecuritySignature, "BSRSPYL", 8);
+		return rc;
+	}
+
+	cifs_pdu->Signature.Sequence.SequenceNumber =
+				cpu_to_le32(server->sequence_number);
+	cifs_pdu->Signature.Sequence.Reserved = 0;
+
+	*pexpected_response_sequence_number = ++server->sequence_number;
+	++server->sequence_number;
+
+	rc = cifs_calc_signature(rqst, server, smb_signature);
+	if (rc)
+		memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
+	else
+		memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
+
+	return rc;
+}
+
+int cifs_sign_smbv(struct kvec *iov, int n_vec, struct TCP_Server_Info *server,
+		   __u32 *pexpected_response_sequence)
+{
+	struct smb_rqst rqst = { .rq_iov = iov,
+				 .rq_nvec = n_vec };
+
+	return cifs_sign_rqst(&rqst, server, pexpected_response_sequence);
+}
+
+/* must be called with server->srv_mutex held */
+int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server,
+		  __u32 *pexpected_response_sequence_number)
+{
+	struct kvec iov[2];
+
+	iov[0].iov_base = cifs_pdu;
+	iov[0].iov_len = 4;
+	iov[1].iov_base = (char *)cifs_pdu + 4;
+	iov[1].iov_len = be32_to_cpu(cifs_pdu->smb_buf_length);
+
+	return cifs_sign_smbv(iov, 2, server,
+			      pexpected_response_sequence_number);
+}
+
+int cifs_verify_signature(struct smb_rqst *rqst,
+			  struct TCP_Server_Info *server,
+			  __u32 expected_sequence_number)
+{
+	unsigned int rc;
+	char server_response_sig[8];
+	char what_we_think_sig_should_be[20];
+	struct smb_hdr *cifs_pdu = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
+
+	if (rqst->rq_iov[0].iov_len != 4 ||
+	    rqst->rq_iov[0].iov_base + 4 != rqst->rq_iov[1].iov_base)
+		return -EIO;
+
+	if (cifs_pdu == NULL || server == NULL)
+		return -EINVAL;
+
+	if (!server->session_estab)
+		return 0;
+
+	if (cifs_pdu->Command == SMB_COM_LOCKING_ANDX) {
+		struct smb_com_lock_req *pSMB =
+			(struct smb_com_lock_req *)cifs_pdu;
+		if (pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE)
+			return 0;
+	}
+
+	/* BB what if signatures are supposed to be on for session but
+	   server does not send one? BB */
+
+	/* Do not need to verify session setups with signature "BSRSPYL "  */
+	if (memcmp(cifs_pdu->Signature.SecuritySignature, "BSRSPYL ", 8) == 0)
+		cifs_dbg(FYI, "dummy signature received for smb command 0x%x\n",
+			 cifs_pdu->Command);
+
+	/* save off the origiginal signature so we can modify the smb and check
+		its signature against what the server sent */
+	memcpy(server_response_sig, cifs_pdu->Signature.SecuritySignature, 8);
+
+	cifs_pdu->Signature.Sequence.SequenceNumber =
+					cpu_to_le32(expected_sequence_number);
+	cifs_pdu->Signature.Sequence.Reserved = 0;
+
+	cifs_server_lock(server);
+	rc = cifs_calc_signature(rqst, server, what_we_think_sig_should_be);
+	cifs_server_unlock(server);
+
+	if (rc)
+		return rc;
+
+/*	cifs_dump_mem("what we think it should be: ",
+		      what_we_think_sig_should_be, 16); */
+
+	if (memcmp(server_response_sig, what_we_think_sig_should_be, 8))
+		return -EACCES;
+	else
+		return 0;
+
+}
+
+/* Build a proper attribute value/target info pairs blob.
+ * Fill in netbios and dns domain name and workstation name
+ * and client time (total five av pairs and + one end of fields indicator.
+ * Allocate domain name which gets freed when session struct is deallocated.
+ */
+static int
+build_avpair_blob(struct cifs_ses *ses, const struct nls_table *nls_cp)
+{
+	unsigned int dlen;
+	unsigned int size = 2 * sizeof(struct ntlmssp2_name);
+	char *defdmname = "WORKGROUP";
+	unsigned char *blobptr;
+	struct ntlmssp2_name *attrptr;
+
+	if (!ses->domainName) {
+		ses->domainName = kstrdup(defdmname, GFP_KERNEL);
+		if (!ses->domainName)
+			return -ENOMEM;
+	}
+
+	dlen = strlen(ses->domainName);
+
+	/*
+	 * The length of this blob is two times the size of a
+	 * structure (av pair) which holds name/size
+	 * ( for NTLMSSP_AV_NB_DOMAIN_NAME followed by NTLMSSP_AV_EOL ) +
+	 * unicode length of a netbios domain name
+	 */
+	kfree_sensitive(ses->auth_key.response);
+	ses->auth_key.len = size + 2 * dlen;
+	ses->auth_key.response = kzalloc(ses->auth_key.len, GFP_KERNEL);
+	if (!ses->auth_key.response) {
+		ses->auth_key.len = 0;
+		return -ENOMEM;
+	}
+
+	blobptr = ses->auth_key.response;
+	attrptr = (struct ntlmssp2_name *) blobptr;
+
+	/*
+	 * As defined in MS-NTLM 3.3.2, just this av pair field
+	 * is sufficient as part of the temp
+	 */
+	attrptr->type = cpu_to_le16(NTLMSSP_AV_NB_DOMAIN_NAME);
+	attrptr->length = cpu_to_le16(2 * dlen);
+	blobptr = (unsigned char *)attrptr + sizeof(struct ntlmssp2_name);
+	cifs_strtoUTF16((__le16 *)blobptr, ses->domainName, dlen, nls_cp);
+
+	return 0;
+}
+
+/* Server has provided av pairs/target info in the type 2 challenge
+ * packet and we have plucked it and stored within smb session.
+ * We parse that blob here to find netbios domain name to be used
+ * as part of ntlmv2 authentication (in Target String), if not already
+ * specified on the command line.
+ * If this function returns without any error but without fetching
+ * domain name, authentication may fail against some server but
+ * may not fail against other (those who are not very particular
+ * about target string i.e. for some, just user name might suffice.
+ */
+static int
+find_domain_name(struct cifs_ses *ses, const struct nls_table *nls_cp)
+{
+	unsigned int attrsize;
+	unsigned int type;
+	unsigned int onesize = sizeof(struct ntlmssp2_name);
+	unsigned char *blobptr;
+	unsigned char *blobend;
+	struct ntlmssp2_name *attrptr;
+
+	if (!ses->auth_key.len || !ses->auth_key.response)
+		return 0;
+
+	blobptr = ses->auth_key.response;
+	blobend = blobptr + ses->auth_key.len;
+
+	while (blobptr + onesize < blobend) {
+		attrptr = (struct ntlmssp2_name *) blobptr;
+		type = le16_to_cpu(attrptr->type);
+		if (type == NTLMSSP_AV_EOL)
+			break;
+		blobptr += 2; /* advance attr type */
+		attrsize = le16_to_cpu(attrptr->length);
+		blobptr += 2; /* advance attr size */
+		if (blobptr + attrsize > blobend)
+			break;
+		if (type == NTLMSSP_AV_NB_DOMAIN_NAME) {
+			if (!attrsize || attrsize >= CIFS_MAX_DOMAINNAME_LEN)
+				break;
+			if (!ses->domainName) {
+				ses->domainName =
+					kmalloc(attrsize + 1, GFP_KERNEL);
+				if (!ses->domainName)
+						return -ENOMEM;
+				cifs_from_utf16(ses->domainName,
+					(__le16 *)blobptr, attrsize, attrsize,
+					nls_cp, NO_MAP_UNI_RSVD);
+				break;
+			}
+		}
+		blobptr += attrsize; /* advance attr  value */
+	}
+
+	return 0;
+}
+
+/* Server has provided av pairs/target info in the type 2 challenge
+ * packet and we have plucked it and stored within smb session.
+ * We parse that blob here to find the server given timestamp
+ * as part of ntlmv2 authentication (or local current time as
+ * default in case of failure)
+ */
+static __le64
+find_timestamp(struct cifs_ses *ses)
+{
+	unsigned int attrsize;
+	unsigned int type;
+	unsigned int onesize = sizeof(struct ntlmssp2_name);
+	unsigned char *blobptr;
+	unsigned char *blobend;
+	struct ntlmssp2_name *attrptr;
+	struct timespec64 ts;
+
+	if (!ses->auth_key.len || !ses->auth_key.response)
+		return 0;
+
+	blobptr = ses->auth_key.response;
+	blobend = blobptr + ses->auth_key.len;
+
+	while (blobptr + onesize < blobend) {
+		attrptr = (struct ntlmssp2_name *) blobptr;
+		type = le16_to_cpu(attrptr->type);
+		if (type == NTLMSSP_AV_EOL)
+			break;
+		blobptr += 2; /* advance attr type */
+		attrsize = le16_to_cpu(attrptr->length);
+		blobptr += 2; /* advance attr size */
+		if (blobptr + attrsize > blobend)
+			break;
+		if (type == NTLMSSP_AV_TIMESTAMP) {
+			if (attrsize == sizeof(u64))
+				return *((__le64 *)blobptr);
+		}
+		blobptr += attrsize; /* advance attr value */
+	}
+
+	ktime_get_real_ts64(&ts);
+	return cpu_to_le64(cifs_UnixTimeToNT(ts));
+}
+
+static int calc_ntlmv2_hash(struct cifs_ses *ses, char *ntlmv2_hash,
+			    const struct nls_table *nls_cp)
+{
+	int rc = 0;
+	int len;
+	char nt_hash[CIFS_NTHASH_SIZE];
+	__le16 *user;
+	wchar_t *domain;
+	wchar_t *server;
+
+	if (!ses->server->secmech.hmacmd5) {
+		cifs_dbg(VFS, "%s: can't generate ntlmv2 hash\n", __func__);
+		return -1;
+	}
+
+	/* calculate md4 hash of password */
+	E_md4hash(ses->password, nt_hash, nls_cp);
+
+	rc = crypto_shash_setkey(ses->server->secmech.hmacmd5->tfm, nt_hash,
+				CIFS_NTHASH_SIZE);
+	if (rc) {
+		cifs_dbg(VFS, "%s: Could not set NT Hash as a key\n", __func__);
+		return rc;
+	}
+
+	rc = crypto_shash_init(ses->server->secmech.hmacmd5);
+	if (rc) {
+		cifs_dbg(VFS, "%s: Could not init hmacmd5\n", __func__);
+		return rc;
+	}
+
+	/* convert ses->user_name to unicode */
+	len = ses->user_name ? strlen(ses->user_name) : 0;
+	user = kmalloc(2 + (len * 2), GFP_KERNEL);
+	if (user == NULL) {
+		rc = -ENOMEM;
+		return rc;
+	}
+
+	if (len) {
+		len = cifs_strtoUTF16(user, ses->user_name, len, nls_cp);
+		UniStrupr(user);
+	} else {
+		memset(user, '\0', 2);
+	}
+
+	rc = crypto_shash_update(ses->server->secmech.hmacmd5,
+				(char *)user, 2 * len);
+	kfree(user);
+	if (rc) {
+		cifs_dbg(VFS, "%s: Could not update with user\n", __func__);
+		return rc;
+	}
+
+	/* convert ses->domainName to unicode and uppercase */
+	if (ses->domainName) {
+		len = strlen(ses->domainName);
+
+		domain = kmalloc(2 + (len * 2), GFP_KERNEL);
+		if (domain == NULL) {
+			rc = -ENOMEM;
+			return rc;
+		}
+		len = cifs_strtoUTF16((__le16 *)domain, ses->domainName, len,
+				      nls_cp);
+		rc =
+		crypto_shash_update(ses->server->secmech.hmacmd5,
+					(char *)domain, 2 * len);
+		kfree(domain);
+		if (rc) {
+			cifs_dbg(VFS, "%s: Could not update with domain\n",
+				 __func__);
+			return rc;
+		}
+	} else {
+		/* We use ses->ip_addr if no domain name available */
+		len = strlen(ses->ip_addr);
+
+		server = kmalloc(2 + (len * 2), GFP_KERNEL);
+		if (server == NULL) {
+			rc = -ENOMEM;
+			return rc;
+		}
+		len = cifs_strtoUTF16((__le16 *)server, ses->ip_addr, len,
+					nls_cp);
+		rc =
+		crypto_shash_update(ses->server->secmech.hmacmd5,
+					(char *)server, 2 * len);
+		kfree(server);
+		if (rc) {
+			cifs_dbg(VFS, "%s: Could not update with server\n",
+				 __func__);
+			return rc;
+		}
+	}
+
+	rc = crypto_shash_final(ses->server->secmech.hmacmd5,
+					ntlmv2_hash);
+	if (rc)
+		cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
+
+	return rc;
+}
+
+static int
+CalcNTLMv2_response(const struct cifs_ses *ses, char *ntlmv2_hash)
+{
+	int rc;
+	struct ntlmv2_resp *ntlmv2 = (struct ntlmv2_resp *)
+	    (ses->auth_key.response + CIFS_SESS_KEY_SIZE);
+	unsigned int hash_len;
+
+	/* The MD5 hash starts at challenge_key.key */
+	hash_len = ses->auth_key.len - (CIFS_SESS_KEY_SIZE +
+		offsetof(struct ntlmv2_resp, challenge.key[0]));
+
+	if (!ses->server->secmech.hmacmd5) {
+		cifs_dbg(VFS, "%s: can't generate ntlmv2 hash\n", __func__);
+		return -1;
+	}
+
+	rc = crypto_shash_setkey(ses->server->secmech.hmacmd5->tfm,
+				 ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
+	if (rc) {
+		cifs_dbg(VFS, "%s: Could not set NTLMV2 Hash as a key\n",
+			 __func__);
+		return rc;
+	}
+
+	rc = crypto_shash_init(ses->server->secmech.hmacmd5);
+	if (rc) {
+		cifs_dbg(VFS, "%s: Could not init hmacmd5\n", __func__);
+		return rc;
+	}
+
+	if (ses->server->negflavor == CIFS_NEGFLAVOR_EXTENDED)
+		memcpy(ntlmv2->challenge.key,
+		       ses->ntlmssp->cryptkey, CIFS_SERVER_CHALLENGE_SIZE);
+	else
+		memcpy(ntlmv2->challenge.key,
+		       ses->server->cryptkey, CIFS_SERVER_CHALLENGE_SIZE);
+	rc = crypto_shash_update(ses->server->secmech.hmacmd5,
+				 ntlmv2->challenge.key, hash_len);
+	if (rc) {
+		cifs_dbg(VFS, "%s: Could not update with response\n", __func__);
+		return rc;
+	}
+
+	/* Note that the MD5 digest over writes anon.challenge_key.key */
+	rc = crypto_shash_final(ses->server->secmech.hmacmd5,
+				ntlmv2->ntlmv2_hash);
+	if (rc)
+		cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
+
+	return rc;
+}
+
+int
+setup_ntlmv2_rsp(struct cifs_ses *ses, const struct nls_table *nls_cp)
+{
+	int rc;
+	int baselen;
+	unsigned int tilen;
+	struct ntlmv2_resp *ntlmv2;
+	char ntlmv2_hash[16];
+	unsigned char *tiblob = NULL; /* target info blob */
+	__le64 rsp_timestamp;
+
+	if (nls_cp == NULL) {
+		cifs_dbg(VFS, "%s called with nls_cp==NULL\n", __func__);
+		return -EINVAL;
+	}
+
+	if (ses->server->negflavor == CIFS_NEGFLAVOR_EXTENDED) {
+		if (!ses->domainName) {
+			if (ses->domainAuto) {
+				rc = find_domain_name(ses, nls_cp);
+				if (rc) {
+					cifs_dbg(VFS, "error %d finding domain name\n",
+						 rc);
+					goto setup_ntlmv2_rsp_ret;
+				}
+			} else {
+				ses->domainName = kstrdup("", GFP_KERNEL);
+			}
+		}
+	} else {
+		rc = build_avpair_blob(ses, nls_cp);
+		if (rc) {
+			cifs_dbg(VFS, "error %d building av pair blob\n", rc);
+			goto setup_ntlmv2_rsp_ret;
+		}
+	}
+
+	/* Must be within 5 minutes of the server (or in range +/-2h
+	 * in case of Mac OS X), so simply carry over server timestamp
+	 * (as Windows 7 does)
+	 */
+	rsp_timestamp = find_timestamp(ses);
+
+	baselen = CIFS_SESS_KEY_SIZE + sizeof(struct ntlmv2_resp);
+	tilen = ses->auth_key.len;
+	tiblob = ses->auth_key.response;
+
+	ses->auth_key.response = kmalloc(baselen + tilen, GFP_KERNEL);
+	if (!ses->auth_key.response) {
+		rc = -ENOMEM;
+		ses->auth_key.len = 0;
+		goto setup_ntlmv2_rsp_ret;
+	}
+	ses->auth_key.len += baselen;
+
+	ntlmv2 = (struct ntlmv2_resp *)
+			(ses->auth_key.response + CIFS_SESS_KEY_SIZE);
+	ntlmv2->blob_signature = cpu_to_le32(0x00000101);
+	ntlmv2->reserved = 0;
+	ntlmv2->time = rsp_timestamp;
+
+	get_random_bytes(&ntlmv2->client_chal, sizeof(ntlmv2->client_chal));
+	ntlmv2->reserved2 = 0;
+
+	memcpy(ses->auth_key.response + baselen, tiblob, tilen);
+
+	cifs_server_lock(ses->server);
+
+	rc = cifs_alloc_hash("hmac(md5)", &ses->server->secmech.hmacmd5);
+	if (rc) {
+		goto unlock;
+	}
+
+	/* calculate ntlmv2_hash */
+	rc = calc_ntlmv2_hash(ses, ntlmv2_hash, nls_cp);
+	if (rc) {
+		cifs_dbg(VFS, "Could not get v2 hash rc %d\n", rc);
+		goto unlock;
+	}
+
+	/* calculate first part of the client response (CR1) */
+	rc = CalcNTLMv2_response(ses, ntlmv2_hash);
+	if (rc) {
+		cifs_dbg(VFS, "Could not calculate CR1 rc: %d\n", rc);
+		goto unlock;
+	}
+
+	/* now calculate the session key for NTLMv2 */
+	rc = crypto_shash_setkey(ses->server->secmech.hmacmd5->tfm,
+		ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
+	if (rc) {
+		cifs_dbg(VFS, "%s: Could not set NTLMV2 Hash as a key\n",
+			 __func__);
+		goto unlock;
+	}
+
+	rc = crypto_shash_init(ses->server->secmech.hmacmd5);
+	if (rc) {
+		cifs_dbg(VFS, "%s: Could not init hmacmd5\n", __func__);
+		goto unlock;
+	}
+
+	rc = crypto_shash_update(ses->server->secmech.hmacmd5,
+		ntlmv2->ntlmv2_hash,
+		CIFS_HMAC_MD5_HASH_SIZE);
+	if (rc) {
+		cifs_dbg(VFS, "%s: Could not update with response\n", __func__);
+		goto unlock;
+	}
+
+	rc = crypto_shash_final(ses->server->secmech.hmacmd5,
+		ses->auth_key.response);
+	if (rc)
+		cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
+
+unlock:
+	cifs_server_unlock(ses->server);
+setup_ntlmv2_rsp_ret:
+	kfree_sensitive(tiblob);
+
+	return rc;
+}
+
+int
+calc_seckey(struct cifs_ses *ses)
+{
+	unsigned char sec_key[CIFS_SESS_KEY_SIZE]; /* a nonce */
+	struct arc4_ctx *ctx_arc4;
+
+	if (fips_enabled)
+		return -ENODEV;
+
+	get_random_bytes(sec_key, CIFS_SESS_KEY_SIZE);
+
+	ctx_arc4 = kmalloc(sizeof(*ctx_arc4), GFP_KERNEL);
+	if (!ctx_arc4) {
+		cifs_dbg(VFS, "Could not allocate arc4 context\n");
+		return -ENOMEM;
+	}
+
+	cifs_arc4_setkey(ctx_arc4, ses->auth_key.response, CIFS_SESS_KEY_SIZE);
+	cifs_arc4_crypt(ctx_arc4, ses->ntlmssp->ciphertext, sec_key,
+			CIFS_CPHTXT_SIZE);
+
+	/* make secondary_key/nonce as session key */
+	memcpy(ses->auth_key.response, sec_key, CIFS_SESS_KEY_SIZE);
+	/* and make len as that of session key only */
+	ses->auth_key.len = CIFS_SESS_KEY_SIZE;
+
+	memzero_explicit(sec_key, CIFS_SESS_KEY_SIZE);
+	kfree_sensitive(ctx_arc4);
+	return 0;
+}
+
+void
+cifs_crypto_secmech_release(struct TCP_Server_Info *server)
+{
+	cifs_free_hash(&server->secmech.aes_cmac);
+	cifs_free_hash(&server->secmech.hmacsha256);
+	cifs_free_hash(&server->secmech.md5);
+	cifs_free_hash(&server->secmech.sha512);
+	cifs_free_hash(&server->secmech.hmacmd5);
+
+	if (server->secmech.enc) {
+		crypto_free_aead(server->secmech.enc);
+		server->secmech.enc = NULL;
+	}
+
+	if (server->secmech.dec) {
+		crypto_free_aead(server->secmech.dec);
+		server->secmech.dec = NULL;
+	}
+}
diff --git a/fs/smb/client/cifsfs.c b/fs/smb/client/cifsfs.c
new file mode 100644
index 0000000000..2131638f26
--- /dev/null
+++ b/fs/smb/client/cifsfs.c
@@ -0,0 +1,2005 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *
+ *   Copyright (C) International Business Machines  Corp., 2002,2008
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   Common Internet FileSystem (CIFS) client
+ *
+ */
+
+/* Note that BB means BUGBUG (ie something to fix eventually) */
+
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/filelock.h>
+#include <linux/mount.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/seq_file.h>
+#include <linux/vfs.h>
+#include <linux/mempool.h>
+#include <linux/delay.h>
+#include <linux/kthread.h>
+#include <linux/freezer.h>
+#include <linux/namei.h>
+#include <linux/random.h>
+#include <linux/uuid.h>
+#include <linux/xattr.h>
+#include <uapi/linux/magic.h>
+#include <net/ipv6.h>
+#include "cifsfs.h"
+#include "cifspdu.h"
+#define DECLARE_GLOBALS_HERE
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifs_fs_sb.h"
+#include <linux/mm.h>
+#include <linux/key-type.h>
+#include "cifs_spnego.h"
+#include "fscache.h"
+#ifdef CONFIG_CIFS_DFS_UPCALL
+#include "dfs_cache.h"
+#endif
+#ifdef CONFIG_CIFS_SWN_UPCALL
+#include "netlink.h"
+#endif
+#include "fs_context.h"
+#include "cached_dir.h"
+
+/*
+ * DOS dates from 1980/1/1 through 2107/12/31
+ * Protocol specifications indicate the range should be to 119, which
+ * limits maximum year to 2099. But this range has not been checked.
+ */
+#define SMB_DATE_MAX (127<<9 | 12<<5 | 31)
+#define SMB_DATE_MIN (0<<9 | 1<<5 | 1)
+#define SMB_TIME_MAX (23<<11 | 59<<5 | 29)
+
+int cifsFYI = 0;
+bool traceSMB;
+bool enable_oplocks = true;
+bool linuxExtEnabled = true;
+bool lookupCacheEnabled = true;
+bool disable_legacy_dialects; /* false by default */
+bool enable_gcm_256 = true;
+bool require_gcm_256; /* false by default */
+bool enable_negotiate_signing; /* false by default */
+unsigned int global_secflags = CIFSSEC_DEF;
+/* unsigned int ntlmv2_support = 0; */
+unsigned int sign_CIFS_PDUs = 1;
+
+/*
+ * Global transaction id (XID) information
+ */
+unsigned int GlobalCurrentXid;	/* protected by GlobalMid_Sem */
+unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
+unsigned int GlobalMaxActiveXid;	/* prot by GlobalMid_Sem */
+spinlock_t GlobalMid_Lock; /* protects above & list operations on midQ entries */
+
+/*
+ *  Global counters, updated atomically
+ */
+atomic_t sesInfoAllocCount;
+atomic_t tconInfoAllocCount;
+atomic_t tcpSesNextId;
+atomic_t tcpSesAllocCount;
+atomic_t tcpSesReconnectCount;
+atomic_t tconInfoReconnectCount;
+
+atomic_t mid_count;
+atomic_t buf_alloc_count;
+atomic_t small_buf_alloc_count;
+#ifdef CONFIG_CIFS_STATS2
+atomic_t total_buf_alloc_count;
+atomic_t total_small_buf_alloc_count;
+#endif/* STATS2 */
+struct list_head	cifs_tcp_ses_list;
+spinlock_t		cifs_tcp_ses_lock;
+static const struct super_operations cifs_super_ops;
+unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
+module_param(CIFSMaxBufSize, uint, 0444);
+MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header) "
+				 "for CIFS requests. "
+				 "Default: 16384 Range: 8192 to 130048");
+unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL;
+module_param(cifs_min_rcv, uint, 0444);
+MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: "
+				"1 to 64");
+unsigned int cifs_min_small = 30;
+module_param(cifs_min_small, uint, 0444);
+MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
+				 "Range: 2 to 256");
+unsigned int cifs_max_pending = CIFS_MAX_REQ;
+module_param(cifs_max_pending, uint, 0444);
+MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server for "
+				   "CIFS/SMB1 dialect (N/A for SMB3) "
+				   "Default: 32767 Range: 2 to 32767.");
+unsigned int dir_cache_timeout = 30;
+module_param(dir_cache_timeout, uint, 0644);
+MODULE_PARM_DESC(dir_cache_timeout, "Number of seconds to cache directory contents for which we have a lease. Default: 30 "
+				 "Range: 1 to 65000 seconds, 0 to disable caching dir contents");
+#ifdef CONFIG_CIFS_STATS2
+unsigned int slow_rsp_threshold = 1;
+module_param(slow_rsp_threshold, uint, 0644);
+MODULE_PARM_DESC(slow_rsp_threshold, "Amount of time (in seconds) to wait "
+				   "before logging that a response is delayed. "
+				   "Default: 1 (if set to 0 disables msg).");
+#endif /* STATS2 */
+
+module_param(enable_oplocks, bool, 0644);
+MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks. Default: y/Y/1");
+
+module_param(enable_gcm_256, bool, 0644);
+MODULE_PARM_DESC(enable_gcm_256, "Enable requesting strongest (256 bit) GCM encryption. Default: n/N/0");
+
+module_param(require_gcm_256, bool, 0644);
+MODULE_PARM_DESC(require_gcm_256, "Require strongest (256 bit) GCM encryption. Default: n/N/0");
+
+module_param(enable_negotiate_signing, bool, 0644);
+MODULE_PARM_DESC(enable_negotiate_signing, "Enable negotiating packet signing algorithm with server. Default: n/N/0");
+
+module_param(disable_legacy_dialects, bool, 0644);
+MODULE_PARM_DESC(disable_legacy_dialects, "To improve security it may be "
+				  "helpful to restrict the ability to "
+				  "override the default dialects (SMB2.1, "
+				  "SMB3 and SMB3.02) on mount with old "
+				  "dialects (CIFS/SMB1 and SMB2) since "
+				  "vers=1.0 (CIFS/SMB1) and vers=2.0 are weaker"
+				  " and less secure. Default: n/N/0");
+
+extern mempool_t *cifs_sm_req_poolp;
+extern mempool_t *cifs_req_poolp;
+extern mempool_t *cifs_mid_poolp;
+
+struct workqueue_struct	*cifsiod_wq;
+struct workqueue_struct	*decrypt_wq;
+struct workqueue_struct	*fileinfo_put_wq;
+struct workqueue_struct	*cifsoplockd_wq;
+struct workqueue_struct	*deferredclose_wq;
+__u32 cifs_lock_secret;
+
+/*
+ * Bumps refcount for cifs super block.
+ * Note that it should be only called if a referece to VFS super block is
+ * already held, e.g. in open-type syscalls context. Otherwise it can race with
+ * atomic_dec_and_test in deactivate_locked_super.
+ */
+void
+cifs_sb_active(struct super_block *sb)
+{
+	struct cifs_sb_info *server = CIFS_SB(sb);
+
+	if (atomic_inc_return(&server->active) == 1)
+		atomic_inc(&sb->s_active);
+}
+
+void
+cifs_sb_deactive(struct super_block *sb)
+{
+	struct cifs_sb_info *server = CIFS_SB(sb);
+
+	if (atomic_dec_and_test(&server->active))
+		deactivate_super(sb);
+}
+
+static int
+cifs_read_super(struct super_block *sb)
+{
+	struct inode *inode;
+	struct cifs_sb_info *cifs_sb;
+	struct cifs_tcon *tcon;
+	struct timespec64 ts;
+	int rc = 0;
+
+	cifs_sb = CIFS_SB(sb);
+	tcon = cifs_sb_master_tcon(cifs_sb);
+
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
+		sb->s_flags |= SB_POSIXACL;
+
+	if (tcon->snapshot_time)
+		sb->s_flags |= SB_RDONLY;
+
+	if (tcon->ses->capabilities & tcon->ses->server->vals->cap_large_files)
+		sb->s_maxbytes = MAX_LFS_FILESIZE;
+	else
+		sb->s_maxbytes = MAX_NON_LFS;
+
+	/*
+	 * Some very old servers like DOS and OS/2 used 2 second granularity
+	 * (while all current servers use 100ns granularity - see MS-DTYP)
+	 * but 1 second is the maximum allowed granularity for the VFS
+	 * so for old servers set time granularity to 1 second while for
+	 * everything else (current servers) set it to 100ns.
+	 */
+	if ((tcon->ses->server->vals->protocol_id == SMB10_PROT_ID) &&
+	    ((tcon->ses->capabilities &
+	      tcon->ses->server->vals->cap_nt_find) == 0) &&
+	    !tcon->unix_ext) {
+		sb->s_time_gran = 1000000000; /* 1 second is max allowed gran */
+		ts = cnvrtDosUnixTm(cpu_to_le16(SMB_DATE_MIN), 0, 0);
+		sb->s_time_min = ts.tv_sec;
+		ts = cnvrtDosUnixTm(cpu_to_le16(SMB_DATE_MAX),
+				    cpu_to_le16(SMB_TIME_MAX), 0);
+		sb->s_time_max = ts.tv_sec;
+	} else {
+		/*
+		 * Almost every server, including all SMB2+, uses DCE TIME
+		 * ie 100 nanosecond units, since 1601.  See MS-DTYP and MS-FSCC
+		 */
+		sb->s_time_gran = 100;
+		ts = cifs_NTtimeToUnix(0);
+		sb->s_time_min = ts.tv_sec;
+		ts = cifs_NTtimeToUnix(cpu_to_le64(S64_MAX));
+		sb->s_time_max = ts.tv_sec;
+	}
+
+	sb->s_magic = CIFS_SUPER_MAGIC;
+	sb->s_op = &cifs_super_ops;
+	sb->s_xattr = cifs_xattr_handlers;
+	rc = super_setup_bdi(sb);
+	if (rc)
+		goto out_no_root;
+	/* tune readahead according to rsize if readahead size not set on mount */
+	if (cifs_sb->ctx->rsize == 0)
+		cifs_sb->ctx->rsize =
+			tcon->ses->server->ops->negotiate_rsize(tcon, cifs_sb->ctx);
+	if (cifs_sb->ctx->rasize)
+		sb->s_bdi->ra_pages = cifs_sb->ctx->rasize / PAGE_SIZE;
+	else
+		sb->s_bdi->ra_pages = 2 * (cifs_sb->ctx->rsize / PAGE_SIZE);
+
+	sb->s_blocksize = CIFS_MAX_MSGSIZE;
+	sb->s_blocksize_bits = 14;	/* default 2**14 = CIFS_MAX_MSGSIZE */
+	inode = cifs_root_iget(sb);
+
+	if (IS_ERR(inode)) {
+		rc = PTR_ERR(inode);
+		goto out_no_root;
+	}
+
+	if (tcon->nocase)
+		sb->s_d_op = &cifs_ci_dentry_ops;
+	else
+		sb->s_d_op = &cifs_dentry_ops;
+
+	sb->s_root = d_make_root(inode);
+	if (!sb->s_root) {
+		rc = -ENOMEM;
+		goto out_no_root;
+	}
+
+#ifdef CONFIG_CIFS_NFSD_EXPORT
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
+		cifs_dbg(FYI, "export ops supported\n");
+		sb->s_export_op = &cifs_export_ops;
+	}
+#endif /* CONFIG_CIFS_NFSD_EXPORT */
+
+	return 0;
+
+out_no_root:
+	cifs_dbg(VFS, "%s: get root inode failed\n", __func__);
+	return rc;
+}
+
+static void cifs_kill_sb(struct super_block *sb)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+
+	/*
+	 * We ned to release all dentries for the cached directories
+	 * before we kill the sb.
+	 */
+	if (cifs_sb->root) {
+		close_all_cached_dirs(cifs_sb);
+
+		/* finally release root dentry */
+		dput(cifs_sb->root);
+		cifs_sb->root = NULL;
+	}
+
+	kill_anon_super(sb);
+	cifs_umount(cifs_sb);
+}
+
+static int
+cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+	struct super_block *sb = dentry->d_sb;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+	struct TCP_Server_Info *server = tcon->ses->server;
+	unsigned int xid;
+	int rc = 0;
+
+	xid = get_xid();
+
+	if (le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength) > 0)
+		buf->f_namelen =
+		       le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength);
+	else
+		buf->f_namelen = PATH_MAX;
+
+	buf->f_fsid.val[0] = tcon->vol_serial_number;
+	/* are using part of create time for more randomness, see man statfs */
+	buf->f_fsid.val[1] =  (int)le64_to_cpu(tcon->vol_create_time);
+
+	buf->f_files = 0;	/* undefined */
+	buf->f_ffree = 0;	/* unlimited */
+
+	if (server->ops->queryfs)
+		rc = server->ops->queryfs(xid, tcon, cifs_sb, buf);
+
+	free_xid(xid);
+	return rc;
+}
+
+static long cifs_fallocate(struct file *file, int mode, loff_t off, loff_t len)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);
+	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+	struct TCP_Server_Info *server = tcon->ses->server;
+
+	if (server->ops->fallocate)
+		return server->ops->fallocate(file, tcon, mode, off, len);
+
+	return -EOPNOTSUPP;
+}
+
+static int cifs_permission(struct mnt_idmap *idmap,
+			   struct inode *inode, int mask)
+{
+	struct cifs_sb_info *cifs_sb;
+
+	cifs_sb = CIFS_SB(inode->i_sb);
+
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
+		if ((mask & MAY_EXEC) && !execute_ok(inode))
+			return -EACCES;
+		else
+			return 0;
+	} else /* file mode might have been restricted at mount time
+		on the client (above and beyond ACL on servers) for
+		servers which do not support setting and viewing mode bits,
+		so allowing client to check permissions is useful */
+		return generic_permission(&nop_mnt_idmap, inode, mask);
+}
+
+static struct kmem_cache *cifs_inode_cachep;
+static struct kmem_cache *cifs_req_cachep;
+static struct kmem_cache *cifs_mid_cachep;
+static struct kmem_cache *cifs_sm_req_cachep;
+mempool_t *cifs_sm_req_poolp;
+mempool_t *cifs_req_poolp;
+mempool_t *cifs_mid_poolp;
+
+static struct inode *
+cifs_alloc_inode(struct super_block *sb)
+{
+	struct cifsInodeInfo *cifs_inode;
+	cifs_inode = alloc_inode_sb(sb, cifs_inode_cachep, GFP_KERNEL);
+	if (!cifs_inode)
+		return NULL;
+	cifs_inode->cifsAttrs = 0x20;	/* default */
+	cifs_inode->time = 0;
+	/*
+	 * Until the file is open and we have gotten oplock info back from the
+	 * server, can not assume caching of file data or metadata.
+	 */
+	cifs_set_oplock_level(cifs_inode, 0);
+	cifs_inode->flags = 0;
+	spin_lock_init(&cifs_inode->writers_lock);
+	cifs_inode->writers = 0;
+	cifs_inode->netfs.inode.i_blkbits = 14;  /* 2**14 = CIFS_MAX_MSGSIZE */
+	cifs_inode->server_eof = 0;
+	cifs_inode->uniqueid = 0;
+	cifs_inode->createtime = 0;
+	cifs_inode->epoch = 0;
+	spin_lock_init(&cifs_inode->open_file_lock);
+	generate_random_uuid(cifs_inode->lease_key);
+	cifs_inode->symlink_target = NULL;
+
+	/*
+	 * Can not set i_flags here - they get immediately overwritten to zero
+	 * by the VFS.
+	 */
+	/* cifs_inode->netfs.inode.i_flags = S_NOATIME | S_NOCMTIME; */
+	INIT_LIST_HEAD(&cifs_inode->openFileList);
+	INIT_LIST_HEAD(&cifs_inode->llist);
+	INIT_LIST_HEAD(&cifs_inode->deferred_closes);
+	spin_lock_init(&cifs_inode->deferred_lock);
+	return &cifs_inode->netfs.inode;
+}
+
+static void
+cifs_free_inode(struct inode *inode)
+{
+	struct cifsInodeInfo *cinode = CIFS_I(inode);
+
+	if (S_ISLNK(inode->i_mode))
+		kfree(cinode->symlink_target);
+	kmem_cache_free(cifs_inode_cachep, cinode);
+}
+
+static void
+cifs_evict_inode(struct inode *inode)
+{
+	truncate_inode_pages_final(&inode->i_data);
+	if (inode->i_state & I_PINNING_FSCACHE_WB)
+		cifs_fscache_unuse_inode_cookie(inode, true);
+	cifs_fscache_release_inode_cookie(inode);
+	clear_inode(inode);
+}
+
+static void
+cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
+{
+	struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
+	struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
+
+	seq_puts(s, ",addr=");
+
+	switch (server->dstaddr.ss_family) {
+	case AF_INET:
+		seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
+		break;
+	case AF_INET6:
+		seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
+		if (sa6->sin6_scope_id)
+			seq_printf(s, "%%%u", sa6->sin6_scope_id);
+		break;
+	default:
+		seq_puts(s, "(unknown)");
+	}
+	if (server->rdma)
+		seq_puts(s, ",rdma");
+}
+
+static void
+cifs_show_security(struct seq_file *s, struct cifs_ses *ses)
+{
+	if (ses->sectype == Unspecified) {
+		if (ses->user_name == NULL)
+			seq_puts(s, ",sec=none");
+		return;
+	}
+
+	seq_puts(s, ",sec=");
+
+	switch (ses->sectype) {
+	case NTLMv2:
+		seq_puts(s, "ntlmv2");
+		break;
+	case Kerberos:
+		seq_puts(s, "krb5");
+		break;
+	case RawNTLMSSP:
+		seq_puts(s, "ntlmssp");
+		break;
+	default:
+		/* shouldn't ever happen */
+		seq_puts(s, "unknown");
+		break;
+	}
+
+	if (ses->sign)
+		seq_puts(s, "i");
+
+	if (ses->sectype == Kerberos)
+		seq_printf(s, ",cruid=%u",
+			   from_kuid_munged(&init_user_ns, ses->cred_uid));
+}
+
+static void
+cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb)
+{
+	seq_puts(s, ",cache=");
+
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
+		seq_puts(s, "strict");
+	else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
+		seq_puts(s, "none");
+	else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RW_CACHE)
+		seq_puts(s, "singleclient"); /* assume only one client access */
+	else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RO_CACHE)
+		seq_puts(s, "ro"); /* read only caching assumed */
+	else
+		seq_puts(s, "loose");
+}
+
+/*
+ * cifs_show_devname() is used so we show the mount device name with correct
+ * format (e.g. forward slashes vs. back slashes) in /proc/mounts
+ */
+static int cifs_show_devname(struct seq_file *m, struct dentry *root)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
+	char *devname = kstrdup(cifs_sb->ctx->source, GFP_KERNEL);
+
+	if (devname == NULL)
+		seq_puts(m, "none");
+	else {
+		convert_delimiter(devname, '/');
+		/* escape all spaces in share names */
+		seq_escape(m, devname, " \t");
+		kfree(devname);
+	}
+	return 0;
+}
+
+/*
+ * cifs_show_options() is for displaying mount options in /proc/mounts.
+ * Not all settable options are displayed but most of the important
+ * ones are.
+ */
+static int
+cifs_show_options(struct seq_file *s, struct dentry *root)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
+	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+	struct sockaddr *srcaddr;
+	srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
+
+	seq_show_option(s, "vers", tcon->ses->server->vals->version_string);
+	cifs_show_security(s, tcon->ses);
+	cifs_show_cache_flavor(s, cifs_sb);
+
+	if (tcon->no_lease)
+		seq_puts(s, ",nolease");
+	if (cifs_sb->ctx->multiuser)
+		seq_puts(s, ",multiuser");
+	else if (tcon->ses->user_name)
+		seq_show_option(s, "username", tcon->ses->user_name);
+
+	if (tcon->ses->domainName && tcon->ses->domainName[0] != 0)
+		seq_show_option(s, "domain", tcon->ses->domainName);
+
+	if (srcaddr->sa_family != AF_UNSPEC) {
+		struct sockaddr_in *saddr4;
+		struct sockaddr_in6 *saddr6;
+		saddr4 = (struct sockaddr_in *)srcaddr;
+		saddr6 = (struct sockaddr_in6 *)srcaddr;
+		if (srcaddr->sa_family == AF_INET6)
+			seq_printf(s, ",srcaddr=%pI6c",
+				   &saddr6->sin6_addr);
+		else if (srcaddr->sa_family == AF_INET)
+			seq_printf(s, ",srcaddr=%pI4",
+				   &saddr4->sin_addr.s_addr);
+		else
+			seq_printf(s, ",srcaddr=BAD-AF:%i",
+				   (int)(srcaddr->sa_family));
+	}
+
+	seq_printf(s, ",uid=%u",
+		   from_kuid_munged(&init_user_ns, cifs_sb->ctx->linux_uid));
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
+		seq_puts(s, ",forceuid");
+	else
+		seq_puts(s, ",noforceuid");
+
+	seq_printf(s, ",gid=%u",
+		   from_kgid_munged(&init_user_ns, cifs_sb->ctx->linux_gid));
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
+		seq_puts(s, ",forcegid");
+	else
+		seq_puts(s, ",noforcegid");
+
+	cifs_show_address(s, tcon->ses->server);
+
+	if (!tcon->unix_ext)
+		seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho",
+					   cifs_sb->ctx->file_mode,
+					   cifs_sb->ctx->dir_mode);
+	if (cifs_sb->ctx->iocharset)
+		seq_printf(s, ",iocharset=%s", cifs_sb->ctx->iocharset);
+	if (tcon->seal)
+		seq_puts(s, ",seal");
+	else if (tcon->ses->server->ignore_signature)
+		seq_puts(s, ",signloosely");
+	if (tcon->nocase)
+		seq_puts(s, ",nocase");
+	if (tcon->nodelete)
+		seq_puts(s, ",nodelete");
+	if (cifs_sb->ctx->no_sparse)
+		seq_puts(s, ",nosparse");
+	if (tcon->local_lease)
+		seq_puts(s, ",locallease");
+	if (tcon->retry)
+		seq_puts(s, ",hard");
+	else
+		seq_puts(s, ",soft");
+	if (tcon->use_persistent)
+		seq_puts(s, ",persistenthandles");
+	else if (tcon->use_resilient)
+		seq_puts(s, ",resilienthandles");
+	if (tcon->posix_extensions)
+		seq_puts(s, ",posix");
+	else if (tcon->unix_ext)
+		seq_puts(s, ",unix");
+	else
+		seq_puts(s, ",nounix");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)
+		seq_puts(s, ",nodfs");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
+		seq_puts(s, ",posixpaths");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
+		seq_puts(s, ",setuids");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL)
+		seq_puts(s, ",idsfromsid");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
+		seq_puts(s, ",serverino");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
+		seq_puts(s, ",rwpidforward");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
+		seq_puts(s, ",forcemand");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
+		seq_puts(s, ",nouser_xattr");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
+		seq_puts(s, ",mapchars");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SFM_CHR)
+		seq_puts(s, ",mapposix");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
+		seq_puts(s, ",sfu");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
+		seq_puts(s, ",nobrl");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_HANDLE_CACHE)
+		seq_puts(s, ",nohandlecache");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)
+		seq_puts(s, ",modefromsid");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
+		seq_puts(s, ",cifsacl");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
+		seq_puts(s, ",dynperm");
+	if (root->d_sb->s_flags & SB_POSIXACL)
+		seq_puts(s, ",acl");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
+		seq_puts(s, ",mfsymlinks");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
+		seq_puts(s, ",fsc");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)
+		seq_puts(s, ",nostrictsync");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
+		seq_puts(s, ",noperm");
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID)
+		seq_printf(s, ",backupuid=%u",
+			   from_kuid_munged(&init_user_ns,
+					    cifs_sb->ctx->backupuid));
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID)
+		seq_printf(s, ",backupgid=%u",
+			   from_kgid_munged(&init_user_ns,
+					    cifs_sb->ctx->backupgid));
+
+	seq_printf(s, ",rsize=%u", cifs_sb->ctx->rsize);
+	seq_printf(s, ",wsize=%u", cifs_sb->ctx->wsize);
+	seq_printf(s, ",bsize=%u", cifs_sb->ctx->bsize);
+	if (cifs_sb->ctx->rasize)
+		seq_printf(s, ",rasize=%u", cifs_sb->ctx->rasize);
+	if (tcon->ses->server->min_offload)
+		seq_printf(s, ",esize=%u", tcon->ses->server->min_offload);
+	seq_printf(s, ",echo_interval=%lu",
+			tcon->ses->server->echo_interval / HZ);
+
+	/* Only display the following if overridden on mount */
+	if (tcon->ses->server->max_credits != SMB2_MAX_CREDITS_AVAILABLE)
+		seq_printf(s, ",max_credits=%u", tcon->ses->server->max_credits);
+	if (tcon->ses->server->tcp_nodelay)
+		seq_puts(s, ",tcpnodelay");
+	if (tcon->ses->server->noautotune)
+		seq_puts(s, ",noautotune");
+	if (tcon->ses->server->noblocksnd)
+		seq_puts(s, ",noblocksend");
+	if (tcon->ses->server->nosharesock)
+		seq_puts(s, ",nosharesock");
+
+	if (tcon->snapshot_time)
+		seq_printf(s, ",snapshot=%llu", tcon->snapshot_time);
+	if (tcon->handle_timeout)
+		seq_printf(s, ",handletimeout=%u", tcon->handle_timeout);
+	if (tcon->max_cached_dirs != MAX_CACHED_FIDS)
+		seq_printf(s, ",max_cached_dirs=%u", tcon->max_cached_dirs);
+
+	/*
+	 * Display file and directory attribute timeout in seconds.
+	 * If file and directory attribute timeout the same then actimeo
+	 * was likely specified on mount
+	 */
+	if (cifs_sb->ctx->acdirmax == cifs_sb->ctx->acregmax)
+		seq_printf(s, ",actimeo=%lu", cifs_sb->ctx->acregmax / HZ);
+	else {
+		seq_printf(s, ",acdirmax=%lu", cifs_sb->ctx->acdirmax / HZ);
+		seq_printf(s, ",acregmax=%lu", cifs_sb->ctx->acregmax / HZ);
+	}
+	seq_printf(s, ",closetimeo=%lu", cifs_sb->ctx->closetimeo / HZ);
+
+	if (tcon->ses->chan_max > 1)
+		seq_printf(s, ",multichannel,max_channels=%zu",
+			   tcon->ses->chan_max);
+
+	if (tcon->use_witness)
+		seq_puts(s, ",witness");
+
+	return 0;
+}
+
+static void cifs_umount_begin(struct super_block *sb)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	struct cifs_tcon *tcon;
+
+	if (cifs_sb == NULL)
+		return;
+
+	tcon = cifs_sb_master_tcon(cifs_sb);
+
+	spin_lock(&cifs_tcp_ses_lock);
+	spin_lock(&tcon->tc_lock);
+	if ((tcon->tc_count > 1) || (tcon->status == TID_EXITING)) {
+		/* we have other mounts to same share or we have
+		   already tried to umount this and woken up
+		   all waiting network requests, nothing to do */
+		spin_unlock(&tcon->tc_lock);
+		spin_unlock(&cifs_tcp_ses_lock);
+		return;
+	}
+	/*
+	 * can not set tcon->status to TID_EXITING yet since we don't know if umount -f will
+	 * fail later (e.g. due to open files).  TID_EXITING will be set just before tdis req sent
+	 */
+	spin_unlock(&tcon->tc_lock);
+	spin_unlock(&cifs_tcp_ses_lock);
+
+	cifs_close_all_deferred_files(tcon);
+	/* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
+	/* cancel_notify_requests(tcon); */
+	if (tcon->ses && tcon->ses->server) {
+		cifs_dbg(FYI, "wake up tasks now - umount begin not complete\n");
+		wake_up_all(&tcon->ses->server->request_q);
+		wake_up_all(&tcon->ses->server->response_q);
+		msleep(1); /* yield */
+		/* we have to kick the requests once more */
+		wake_up_all(&tcon->ses->server->response_q);
+		msleep(1);
+	}
+
+	return;
+}
+
+static int cifs_freeze(struct super_block *sb)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	struct cifs_tcon *tcon;
+
+	if (cifs_sb == NULL)
+		return 0;
+
+	tcon = cifs_sb_master_tcon(cifs_sb);
+
+	cifs_close_all_deferred_files(tcon);
+	return 0;
+}
+
+#ifdef CONFIG_CIFS_STATS2
+static int cifs_show_stats(struct seq_file *s, struct dentry *root)
+{
+	/* BB FIXME */
+	return 0;
+}
+#endif
+
+static int cifs_write_inode(struct inode *inode, struct writeback_control *wbc)
+{
+	fscache_unpin_writeback(wbc, cifs_inode_cookie(inode));
+	return 0;
+}
+
+static int cifs_drop_inode(struct inode *inode)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+
+	/* no serverino => unconditional eviction */
+	return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
+		generic_drop_inode(inode);
+}
+
+static const struct super_operations cifs_super_ops = {
+	.statfs = cifs_statfs,
+	.alloc_inode = cifs_alloc_inode,
+	.write_inode	= cifs_write_inode,
+	.free_inode = cifs_free_inode,
+	.drop_inode	= cifs_drop_inode,
+	.evict_inode	= cifs_evict_inode,
+/*	.show_path	= cifs_show_path, */ /* Would we ever need show path? */
+	.show_devname   = cifs_show_devname,
+/*	.delete_inode	= cifs_delete_inode,  */  /* Do not need above
+	function unless later we add lazy close of inodes or unless the
+	kernel forgets to call us with the same number of releases (closes)
+	as opens */
+	.show_options = cifs_show_options,
+	.umount_begin   = cifs_umount_begin,
+	.freeze_fs      = cifs_freeze,
+#ifdef CONFIG_CIFS_STATS2
+	.show_stats = cifs_show_stats,
+#endif
+};
+
+/*
+ * Get root dentry from superblock according to prefix path mount option.
+ * Return dentry with refcount + 1 on success and NULL otherwise.
+ */
+static struct dentry *
+cifs_get_root(struct smb3_fs_context *ctx, struct super_block *sb)
+{
+	struct dentry *dentry;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	char *full_path = NULL;
+	char *s, *p;
+	char sep;
+
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
+		return dget(sb->s_root);
+
+	full_path = cifs_build_path_to_root(ctx, cifs_sb,
+				cifs_sb_master_tcon(cifs_sb), 0);
+	if (full_path == NULL)
+		return ERR_PTR(-ENOMEM);
+
+	cifs_dbg(FYI, "Get root dentry for %s\n", full_path);
+
+	sep = CIFS_DIR_SEP(cifs_sb);
+	dentry = dget(sb->s_root);
+	s = full_path;
+
+	do {
+		struct inode *dir = d_inode(dentry);
+		struct dentry *child;
+
+		if (!S_ISDIR(dir->i_mode)) {
+			dput(dentry);
+			dentry = ERR_PTR(-ENOTDIR);
+			break;
+		}
+
+		/* skip separators */
+		while (*s == sep)
+			s++;
+		if (!*s)
+			break;
+		p = s++;
+		/* next separator */
+		while (*s && *s != sep)
+			s++;
+
+		child = lookup_positive_unlocked(p, dentry, s - p);
+		dput(dentry);
+		dentry = child;
+	} while (!IS_ERR(dentry));
+	kfree(full_path);
+	return dentry;
+}
+
+static int cifs_set_super(struct super_block *sb, void *data)
+{
+	struct cifs_mnt_data *mnt_data = data;
+	sb->s_fs_info = mnt_data->cifs_sb;
+	return set_anon_super(sb, NULL);
+}
+
+struct dentry *
+cifs_smb3_do_mount(struct file_system_type *fs_type,
+	      int flags, struct smb3_fs_context *old_ctx)
+{
+	struct cifs_mnt_data mnt_data;
+	struct cifs_sb_info *cifs_sb;
+	struct super_block *sb;
+	struct dentry *root;
+	int rc;
+
+	if (cifsFYI) {
+		cifs_dbg(FYI, "%s: devname=%s flags=0x%x\n", __func__,
+			 old_ctx->source, flags);
+	} else {
+		cifs_info("Attempting to mount %s\n", old_ctx->source);
+	}
+
+	cifs_sb = kzalloc(sizeof(*cifs_sb), GFP_KERNEL);
+	if (!cifs_sb)
+		return ERR_PTR(-ENOMEM);
+
+	cifs_sb->ctx = kzalloc(sizeof(struct smb3_fs_context), GFP_KERNEL);
+	if (!cifs_sb->ctx) {
+		root = ERR_PTR(-ENOMEM);
+		goto out;
+	}
+	rc = smb3_fs_context_dup(cifs_sb->ctx, old_ctx);
+	if (rc) {
+		root = ERR_PTR(rc);
+		goto out;
+	}
+
+	rc = cifs_setup_cifs_sb(cifs_sb);
+	if (rc) {
+		root = ERR_PTR(rc);
+		goto out;
+	}
+
+	rc = cifs_mount(cifs_sb, cifs_sb->ctx);
+	if (rc) {
+		if (!(flags & SB_SILENT))
+			cifs_dbg(VFS, "cifs_mount failed w/return code = %d\n",
+				 rc);
+		root = ERR_PTR(rc);
+		goto out;
+	}
+
+	mnt_data.ctx = cifs_sb->ctx;
+	mnt_data.cifs_sb = cifs_sb;
+	mnt_data.flags = flags;
+
+	/* BB should we make this contingent on mount parm? */
+	flags |= SB_NODIRATIME | SB_NOATIME;
+
+	sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data);
+	if (IS_ERR(sb)) {
+		cifs_umount(cifs_sb);
+		return ERR_CAST(sb);
+	}
+
+	if (sb->s_root) {
+		cifs_dbg(FYI, "Use existing superblock\n");
+		cifs_umount(cifs_sb);
+		cifs_sb = NULL;
+	} else {
+		rc = cifs_read_super(sb);
+		if (rc) {
+			root = ERR_PTR(rc);
+			goto out_super;
+		}
+
+		sb->s_flags |= SB_ACTIVE;
+	}
+
+	root = cifs_get_root(cifs_sb ? cifs_sb->ctx : old_ctx, sb);
+	if (IS_ERR(root))
+		goto out_super;
+
+	if (cifs_sb)
+		cifs_sb->root = dget(root);
+
+	cifs_dbg(FYI, "dentry root is: %p\n", root);
+	return root;
+
+out_super:
+	deactivate_locked_super(sb);
+	return root;
+out:
+	kfree(cifs_sb->prepath);
+	smb3_cleanup_fs_context(cifs_sb->ctx);
+	kfree(cifs_sb);
+	return root;
+}
+
+
+static ssize_t
+cifs_loose_read_iter(struct kiocb *iocb, struct iov_iter *iter)
+{
+	ssize_t rc;
+	struct inode *inode = file_inode(iocb->ki_filp);
+
+	if (iocb->ki_flags & IOCB_DIRECT)
+		return cifs_user_readv(iocb, iter);
+
+	rc = cifs_revalidate_mapping(inode);
+	if (rc)
+		return rc;
+
+	return generic_file_read_iter(iocb, iter);
+}
+
+static ssize_t cifs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
+{
+	struct inode *inode = file_inode(iocb->ki_filp);
+	struct cifsInodeInfo *cinode = CIFS_I(inode);
+	ssize_t written;
+	int rc;
+
+	if (iocb->ki_filp->f_flags & O_DIRECT) {
+		written = cifs_user_writev(iocb, from);
+		if (written > 0 && CIFS_CACHE_READ(cinode)) {
+			cifs_zap_mapping(inode);
+			cifs_dbg(FYI,
+				 "Set no oplock for inode=%p after a write operation\n",
+				 inode);
+			cinode->oplock = 0;
+		}
+		return written;
+	}
+
+	written = cifs_get_writer(cinode);
+	if (written)
+		return written;
+
+	written = generic_file_write_iter(iocb, from);
+
+	if (CIFS_CACHE_WRITE(CIFS_I(inode)))
+		goto out;
+
+	rc = filemap_fdatawrite(inode->i_mapping);
+	if (rc)
+		cifs_dbg(FYI, "cifs_file_write_iter: %d rc on %p inode\n",
+			 rc, inode);
+
+out:
+	cifs_put_writer(cinode);
+	return written;
+}
+
+static loff_t cifs_llseek(struct file *file, loff_t offset, int whence)
+{
+	struct cifsFileInfo *cfile = file->private_data;
+	struct cifs_tcon *tcon;
+
+	/*
+	 * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
+	 * the cached file length
+	 */
+	if (whence != SEEK_SET && whence != SEEK_CUR) {
+		int rc;
+		struct inode *inode = file_inode(file);
+
+		/*
+		 * We need to be sure that all dirty pages are written and the
+		 * server has the newest file length.
+		 */
+		if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
+		    inode->i_mapping->nrpages != 0) {
+			rc = filemap_fdatawait(inode->i_mapping);
+			if (rc) {
+				mapping_set_error(inode->i_mapping, rc);
+				return rc;
+			}
+		}
+		/*
+		 * Some applications poll for the file length in this strange
+		 * way so we must seek to end on non-oplocked files by
+		 * setting the revalidate time to zero.
+		 */
+		CIFS_I(inode)->time = 0;
+
+		rc = cifs_revalidate_file_attr(file);
+		if (rc < 0)
+			return (loff_t)rc;
+	}
+	if (cfile && cfile->tlink) {
+		tcon = tlink_tcon(cfile->tlink);
+		if (tcon->ses->server->ops->llseek)
+			return tcon->ses->server->ops->llseek(file, tcon,
+							      offset, whence);
+	}
+	return generic_file_llseek(file, offset, whence);
+}
+
+static int
+cifs_setlease(struct file *file, int arg, struct file_lock **lease, void **priv)
+{
+	/*
+	 * Note that this is called by vfs setlease with i_lock held to
+	 * protect *lease from going away.
+	 */
+	struct inode *inode = file_inode(file);
+	struct cifsFileInfo *cfile = file->private_data;
+
+	if (!(S_ISREG(inode->i_mode)))
+		return -EINVAL;
+
+	/* Check if file is oplocked if this is request for new lease */
+	if (arg == F_UNLCK ||
+	    ((arg == F_RDLCK) && CIFS_CACHE_READ(CIFS_I(inode))) ||
+	    ((arg == F_WRLCK) && CIFS_CACHE_WRITE(CIFS_I(inode))))
+		return generic_setlease(file, arg, lease, priv);
+	else if (tlink_tcon(cfile->tlink)->local_lease &&
+		 !CIFS_CACHE_READ(CIFS_I(inode)))
+		/*
+		 * If the server claims to support oplock on this file, then we
+		 * still need to check oplock even if the local_lease mount
+		 * option is set, but there are servers which do not support
+		 * oplock for which this mount option may be useful if the user
+		 * knows that the file won't be changed on the server by anyone
+		 * else.
+		 */
+		return generic_setlease(file, arg, lease, priv);
+	else
+		return -EAGAIN;
+}
+
+struct file_system_type cifs_fs_type = {
+	.owner = THIS_MODULE,
+	.name = "cifs",
+	.init_fs_context = smb3_init_fs_context,
+	.parameters = smb3_fs_parameters,
+	.kill_sb = cifs_kill_sb,
+	.fs_flags = FS_RENAME_DOES_D_MOVE,
+};
+MODULE_ALIAS_FS("cifs");
+
+struct file_system_type smb3_fs_type = {
+	.owner = THIS_MODULE,
+	.name = "smb3",
+	.init_fs_context = smb3_init_fs_context,
+	.parameters = smb3_fs_parameters,
+	.kill_sb = cifs_kill_sb,
+	.fs_flags = FS_RENAME_DOES_D_MOVE,
+};
+MODULE_ALIAS_FS("smb3");
+MODULE_ALIAS("smb3");
+
+const struct inode_operations cifs_dir_inode_ops = {
+	.create = cifs_create,
+	.atomic_open = cifs_atomic_open,
+	.lookup = cifs_lookup,
+	.getattr = cifs_getattr,
+	.unlink = cifs_unlink,
+	.link = cifs_hardlink,
+	.mkdir = cifs_mkdir,
+	.rmdir = cifs_rmdir,
+	.rename = cifs_rename2,
+	.permission = cifs_permission,
+	.setattr = cifs_setattr,
+	.symlink = cifs_symlink,
+	.mknod   = cifs_mknod,
+	.listxattr = cifs_listxattr,
+	.get_acl = cifs_get_acl,
+	.set_acl = cifs_set_acl,
+};
+
+const struct inode_operations cifs_file_inode_ops = {
+	.setattr = cifs_setattr,
+	.getattr = cifs_getattr,
+	.permission = cifs_permission,
+	.listxattr = cifs_listxattr,
+	.fiemap = cifs_fiemap,
+	.get_acl = cifs_get_acl,
+	.set_acl = cifs_set_acl,
+};
+
+const char *cifs_get_link(struct dentry *dentry, struct inode *inode,
+			    struct delayed_call *done)
+{
+	char *target_path;
+
+	target_path = kmalloc(PATH_MAX, GFP_KERNEL);
+	if (!target_path)
+		return ERR_PTR(-ENOMEM);
+
+	spin_lock(&inode->i_lock);
+	if (likely(CIFS_I(inode)->symlink_target)) {
+		strscpy(target_path, CIFS_I(inode)->symlink_target, PATH_MAX);
+	} else {
+		kfree(target_path);
+		target_path = ERR_PTR(-EOPNOTSUPP);
+	}
+	spin_unlock(&inode->i_lock);
+
+	if (!IS_ERR(target_path))
+		set_delayed_call(done, kfree_link, target_path);
+
+	return target_path;
+}
+
+const struct inode_operations cifs_symlink_inode_ops = {
+	.get_link = cifs_get_link,
+	.setattr = cifs_setattr,
+	.permission = cifs_permission,
+	.listxattr = cifs_listxattr,
+};
+
+/*
+ * Advance the EOF marker to after the source range.
+ */
+static int cifs_precopy_set_eof(struct inode *src_inode, struct cifsInodeInfo *src_cifsi,
+				struct cifs_tcon *src_tcon,
+				unsigned int xid, loff_t src_end)
+{
+	struct cifsFileInfo *writeable_srcfile;
+	int rc = -EINVAL;
+
+	writeable_srcfile = find_writable_file(src_cifsi, FIND_WR_FSUID_ONLY);
+	if (writeable_srcfile) {
+		if (src_tcon->ses->server->ops->set_file_size)
+			rc = src_tcon->ses->server->ops->set_file_size(
+				xid, src_tcon, writeable_srcfile,
+				src_inode->i_size, true /* no need to set sparse */);
+		else
+			rc = -ENOSYS;
+		cifsFileInfo_put(writeable_srcfile);
+		cifs_dbg(FYI, "SetFSize for copychunk rc = %d\n", rc);
+	}
+
+	if (rc < 0)
+		goto set_failed;
+
+	netfs_resize_file(&src_cifsi->netfs, src_end);
+	fscache_resize_cookie(cifs_inode_cookie(src_inode), src_end);
+	return 0;
+
+set_failed:
+	return filemap_write_and_wait(src_inode->i_mapping);
+}
+
+/*
+ * Flush out either the folio that overlaps the beginning of a range in which
+ * pos resides or the folio that overlaps the end of a range unless that folio
+ * is entirely within the range we're going to invalidate.  We extend the flush
+ * bounds to encompass the folio.
+ */
+static int cifs_flush_folio(struct inode *inode, loff_t pos, loff_t *_fstart, loff_t *_fend,
+			    bool first)
+{
+	struct folio *folio;
+	unsigned long long fpos, fend;
+	pgoff_t index = pos / PAGE_SIZE;
+	size_t size;
+	int rc = 0;
+
+	folio = filemap_get_folio(inode->i_mapping, index);
+	if (IS_ERR(folio))
+		return 0;
+
+	size = folio_size(folio);
+	fpos = folio_pos(folio);
+	fend = fpos + size - 1;
+	*_fstart = min_t(unsigned long long, *_fstart, fpos);
+	*_fend   = max_t(unsigned long long, *_fend, fend);
+	if ((first && pos == fpos) || (!first && pos == fend))
+		goto out;
+
+	rc = filemap_write_and_wait_range(inode->i_mapping, fpos, fend);
+out:
+	folio_put(folio);
+	return rc;
+}
+
+static loff_t cifs_remap_file_range(struct file *src_file, loff_t off,
+		struct file *dst_file, loff_t destoff, loff_t len,
+		unsigned int remap_flags)
+{
+	struct inode *src_inode = file_inode(src_file);
+	struct inode *target_inode = file_inode(dst_file);
+	struct cifsInodeInfo *src_cifsi = CIFS_I(src_inode);
+	struct cifsInodeInfo *target_cifsi = CIFS_I(target_inode);
+	struct cifsFileInfo *smb_file_src = src_file->private_data;
+	struct cifsFileInfo *smb_file_target = dst_file->private_data;
+	struct cifs_tcon *target_tcon, *src_tcon;
+	unsigned long long destend, fstart, fend, new_size;
+	unsigned int xid;
+	int rc;
+
+	if (remap_flags & REMAP_FILE_DEDUP)
+		return -EOPNOTSUPP;
+	if (remap_flags & ~REMAP_FILE_ADVISORY)
+		return -EINVAL;
+
+	cifs_dbg(FYI, "clone range\n");
+
+	xid = get_xid();
+
+	if (!smb_file_src || !smb_file_target) {
+		rc = -EBADF;
+		cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
+		goto out;
+	}
+
+	src_tcon = tlink_tcon(smb_file_src->tlink);
+	target_tcon = tlink_tcon(smb_file_target->tlink);
+
+	/*
+	 * Note: cifs case is easier than btrfs since server responsible for
+	 * checks for proper open modes and file type and if it wants
+	 * server could even support copy of range where source = target
+	 */
+	lock_two_nondirectories(target_inode, src_inode);
+
+	if (len == 0)
+		len = src_inode->i_size - off;
+
+	cifs_dbg(FYI, "clone range\n");
+
+	/* Flush the source buffer */
+	rc = filemap_write_and_wait_range(src_inode->i_mapping, off,
+					  off + len - 1);
+	if (rc)
+		goto unlock;
+
+	/* The server-side copy will fail if the source crosses the EOF marker.
+	 * Advance the EOF marker after the flush above to the end of the range
+	 * if it's short of that.
+	 */
+	if (src_cifsi->netfs.remote_i_size < off + len) {
+		rc = cifs_precopy_set_eof(src_inode, src_cifsi, src_tcon, xid, off + len);
+		if (rc < 0)
+			goto unlock;
+	}
+
+	new_size = destoff + len;
+	destend = destoff + len - 1;
+
+	/* Flush the folios at either end of the destination range to prevent
+	 * accidental loss of dirty data outside of the range.
+	 */
+	fstart = destoff;
+	fend = destend;
+
+	rc = cifs_flush_folio(target_inode, destoff, &fstart, &fend, true);
+	if (rc)
+		goto unlock;
+	rc = cifs_flush_folio(target_inode, destend, &fstart, &fend, false);
+	if (rc)
+		goto unlock;
+
+	/* Discard all the folios that overlap the destination region. */
+	cifs_dbg(FYI, "about to discard pages %llx-%llx\n", fstart, fend);
+	truncate_inode_pages_range(&target_inode->i_data, fstart, fend);
+
+	fscache_invalidate(cifs_inode_cookie(target_inode), NULL,
+			   i_size_read(target_inode), 0);
+
+	rc = -EOPNOTSUPP;
+	if (target_tcon->ses->server->ops->duplicate_extents) {
+		rc = target_tcon->ses->server->ops->duplicate_extents(xid,
+			smb_file_src, smb_file_target, off, len, destoff);
+		if (rc == 0 && new_size > i_size_read(target_inode)) {
+			truncate_setsize(target_inode, new_size);
+			netfs_resize_file(&target_cifsi->netfs, new_size);
+			fscache_resize_cookie(cifs_inode_cookie(target_inode),
+					      new_size);
+		}
+	}
+
+	/* force revalidate of size and timestamps of target file now
+	   that target is updated on the server */
+	CIFS_I(target_inode)->time = 0;
+unlock:
+	/* although unlocking in the reverse order from locking is not
+	   strictly necessary here it is a little cleaner to be consistent */
+	unlock_two_nondirectories(src_inode, target_inode);
+out:
+	free_xid(xid);
+	return rc < 0 ? rc : len;
+}
+
+ssize_t cifs_file_copychunk_range(unsigned int xid,
+				struct file *src_file, loff_t off,
+				struct file *dst_file, loff_t destoff,
+				size_t len, unsigned int flags)
+{
+	struct inode *src_inode = file_inode(src_file);
+	struct inode *target_inode = file_inode(dst_file);
+	struct cifsInodeInfo *src_cifsi = CIFS_I(src_inode);
+	struct cifsFileInfo *smb_file_src;
+	struct cifsFileInfo *smb_file_target;
+	struct cifs_tcon *src_tcon;
+	struct cifs_tcon *target_tcon;
+	unsigned long long destend, fstart, fend;
+	ssize_t rc;
+
+	cifs_dbg(FYI, "copychunk range\n");
+
+	if (!src_file->private_data || !dst_file->private_data) {
+		rc = -EBADF;
+		cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
+		goto out;
+	}
+
+	rc = -EXDEV;
+	smb_file_target = dst_file->private_data;
+	smb_file_src = src_file->private_data;
+	src_tcon = tlink_tcon(smb_file_src->tlink);
+	target_tcon = tlink_tcon(smb_file_target->tlink);
+
+	if (src_tcon->ses != target_tcon->ses) {
+		cifs_dbg(VFS, "source and target of copy not on same server\n");
+		goto out;
+	}
+
+	rc = -EOPNOTSUPP;
+	if (!target_tcon->ses->server->ops->copychunk_range)
+		goto out;
+
+	/*
+	 * Note: cifs case is easier than btrfs since server responsible for
+	 * checks for proper open modes and file type and if it wants
+	 * server could even support copy of range where source = target
+	 */
+	lock_two_nondirectories(target_inode, src_inode);
+
+	cifs_dbg(FYI, "about to flush pages\n");
+
+	rc = filemap_write_and_wait_range(src_inode->i_mapping, off,
+					  off + len - 1);
+	if (rc)
+		goto unlock;
+
+	/* The server-side copy will fail if the source crosses the EOF marker.
+	 * Advance the EOF marker after the flush above to the end of the range
+	 * if it's short of that.
+	 */
+	if (src_cifsi->server_eof < off + len) {
+		rc = cifs_precopy_set_eof(src_inode, src_cifsi, src_tcon, xid, off + len);
+		if (rc < 0)
+			goto unlock;
+	}
+
+	destend = destoff + len - 1;
+
+	/* Flush the folios at either end of the destination range to prevent
+	 * accidental loss of dirty data outside of the range.
+	 */
+	fstart = destoff;
+	fend = destend;
+
+	rc = cifs_flush_folio(target_inode, destoff, &fstart, &fend, true);
+	if (rc)
+		goto unlock;
+	rc = cifs_flush_folio(target_inode, destend, &fstart, &fend, false);
+	if (rc)
+		goto unlock;
+
+	/* Discard all the folios that overlap the destination region. */
+	truncate_inode_pages_range(&target_inode->i_data, fstart, fend);
+
+	rc = file_modified(dst_file);
+	if (!rc) {
+		rc = target_tcon->ses->server->ops->copychunk_range(xid,
+			smb_file_src, smb_file_target, off, len, destoff);
+		if (rc > 0 && destoff + rc > i_size_read(target_inode))
+			truncate_setsize(target_inode, destoff + rc);
+	}
+
+	file_accessed(src_file);
+
+	/* force revalidate of size and timestamps of target file now
+	 * that target is updated on the server
+	 */
+	CIFS_I(target_inode)->time = 0;
+
+unlock:
+	/* although unlocking in the reverse order from locking is not
+	 * strictly necessary here it is a little cleaner to be consistent
+	 */
+	unlock_two_nondirectories(src_inode, target_inode);
+
+out:
+	return rc;
+}
+
+/*
+ * Directory operations under CIFS/SMB2/SMB3 are synchronous, so fsync()
+ * is a dummy operation.
+ */
+static int cifs_dir_fsync(struct file *file, loff_t start, loff_t end, int datasync)
+{
+	cifs_dbg(FYI, "Sync directory - name: %pD datasync: 0x%x\n",
+		 file, datasync);
+
+	return 0;
+}
+
+static ssize_t cifs_copy_file_range(struct file *src_file, loff_t off,
+				struct file *dst_file, loff_t destoff,
+				size_t len, unsigned int flags)
+{
+	unsigned int xid = get_xid();
+	ssize_t rc;
+	struct cifsFileInfo *cfile = dst_file->private_data;
+
+	if (cfile->swapfile) {
+		rc = -EOPNOTSUPP;
+		free_xid(xid);
+		return rc;
+	}
+
+	rc = cifs_file_copychunk_range(xid, src_file, off, dst_file, destoff,
+					len, flags);
+	free_xid(xid);
+
+	if (rc == -EOPNOTSUPP || rc == -EXDEV)
+		rc = generic_copy_file_range(src_file, off, dst_file,
+					     destoff, len, flags);
+	return rc;
+}
+
+const struct file_operations cifs_file_ops = {
+	.read_iter = cifs_loose_read_iter,
+	.write_iter = cifs_file_write_iter,
+	.open = cifs_open,
+	.release = cifs_close,
+	.lock = cifs_lock,
+	.flock = cifs_flock,
+	.fsync = cifs_fsync,
+	.flush = cifs_flush,
+	.mmap  = cifs_file_mmap,
+	.splice_read = filemap_splice_read,
+	.splice_write = iter_file_splice_write,
+	.llseek = cifs_llseek,
+	.unlocked_ioctl	= cifs_ioctl,
+	.copy_file_range = cifs_copy_file_range,
+	.remap_file_range = cifs_remap_file_range,
+	.setlease = cifs_setlease,
+	.fallocate = cifs_fallocate,
+};
+
+const struct file_operations cifs_file_strict_ops = {
+	.read_iter = cifs_strict_readv,
+	.write_iter = cifs_strict_writev,
+	.open = cifs_open,
+	.release = cifs_close,
+	.lock = cifs_lock,
+	.flock = cifs_flock,
+	.fsync = cifs_strict_fsync,
+	.flush = cifs_flush,
+	.mmap = cifs_file_strict_mmap,
+	.splice_read = filemap_splice_read,
+	.splice_write = iter_file_splice_write,
+	.llseek = cifs_llseek,
+	.unlocked_ioctl	= cifs_ioctl,
+	.copy_file_range = cifs_copy_file_range,
+	.remap_file_range = cifs_remap_file_range,
+	.setlease = cifs_setlease,
+	.fallocate = cifs_fallocate,
+};
+
+const struct file_operations cifs_file_direct_ops = {
+	.read_iter = cifs_direct_readv,
+	.write_iter = cifs_direct_writev,
+	.open = cifs_open,
+	.release = cifs_close,
+	.lock = cifs_lock,
+	.flock = cifs_flock,
+	.fsync = cifs_fsync,
+	.flush = cifs_flush,
+	.mmap = cifs_file_mmap,
+	.splice_read = copy_splice_read,
+	.splice_write = iter_file_splice_write,
+	.unlocked_ioctl  = cifs_ioctl,
+	.copy_file_range = cifs_copy_file_range,
+	.remap_file_range = cifs_remap_file_range,
+	.llseek = cifs_llseek,
+	.setlease = cifs_setlease,
+	.fallocate = cifs_fallocate,
+};
+
+const struct file_operations cifs_file_nobrl_ops = {
+	.read_iter = cifs_loose_read_iter,
+	.write_iter = cifs_file_write_iter,
+	.open = cifs_open,
+	.release = cifs_close,
+	.fsync = cifs_fsync,
+	.flush = cifs_flush,
+	.mmap  = cifs_file_mmap,
+	.splice_read = filemap_splice_read,
+	.splice_write = iter_file_splice_write,
+	.llseek = cifs_llseek,
+	.unlocked_ioctl	= cifs_ioctl,
+	.copy_file_range = cifs_copy_file_range,
+	.remap_file_range = cifs_remap_file_range,
+	.setlease = cifs_setlease,
+	.fallocate = cifs_fallocate,
+};
+
+const struct file_operations cifs_file_strict_nobrl_ops = {
+	.read_iter = cifs_strict_readv,
+	.write_iter = cifs_strict_writev,
+	.open = cifs_open,
+	.release = cifs_close,
+	.fsync = cifs_strict_fsync,
+	.flush = cifs_flush,
+	.mmap = cifs_file_strict_mmap,
+	.splice_read = filemap_splice_read,
+	.splice_write = iter_file_splice_write,
+	.llseek = cifs_llseek,
+	.unlocked_ioctl	= cifs_ioctl,
+	.copy_file_range = cifs_copy_file_range,
+	.remap_file_range = cifs_remap_file_range,
+	.setlease = cifs_setlease,
+	.fallocate = cifs_fallocate,
+};
+
+const struct file_operations cifs_file_direct_nobrl_ops = {
+	.read_iter = cifs_direct_readv,
+	.write_iter = cifs_direct_writev,
+	.open = cifs_open,
+	.release = cifs_close,
+	.fsync = cifs_fsync,
+	.flush = cifs_flush,
+	.mmap = cifs_file_mmap,
+	.splice_read = copy_splice_read,
+	.splice_write = iter_file_splice_write,
+	.unlocked_ioctl  = cifs_ioctl,
+	.copy_file_range = cifs_copy_file_range,
+	.remap_file_range = cifs_remap_file_range,
+	.llseek = cifs_llseek,
+	.setlease = cifs_setlease,
+	.fallocate = cifs_fallocate,
+};
+
+const struct file_operations cifs_dir_ops = {
+	.iterate_shared = cifs_readdir,
+	.release = cifs_closedir,
+	.read    = generic_read_dir,
+	.unlocked_ioctl  = cifs_ioctl,
+	.copy_file_range = cifs_copy_file_range,
+	.remap_file_range = cifs_remap_file_range,
+	.llseek = generic_file_llseek,
+	.fsync = cifs_dir_fsync,
+};
+
+static void
+cifs_init_once(void *inode)
+{
+	struct cifsInodeInfo *cifsi = inode;
+
+	inode_init_once(&cifsi->netfs.inode);
+	init_rwsem(&cifsi->lock_sem);
+}
+
+static int __init
+cifs_init_inodecache(void)
+{
+	cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
+					      sizeof(struct cifsInodeInfo),
+					      0, (SLAB_RECLAIM_ACCOUNT|
+						SLAB_MEM_SPREAD|SLAB_ACCOUNT),
+					      cifs_init_once);
+	if (cifs_inode_cachep == NULL)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static void
+cifs_destroy_inodecache(void)
+{
+	/*
+	 * Make sure all delayed rcu free inodes are flushed before we
+	 * destroy cache.
+	 */
+	rcu_barrier();
+	kmem_cache_destroy(cifs_inode_cachep);
+}
+
+static int
+cifs_init_request_bufs(void)
+{
+	/*
+	 * SMB2 maximum header size is bigger than CIFS one - no problems to
+	 * allocate some more bytes for CIFS.
+	 */
+	size_t max_hdr_size = MAX_SMB2_HDR_SIZE;
+
+	if (CIFSMaxBufSize < 8192) {
+	/* Buffer size can not be smaller than 2 * PATH_MAX since maximum
+	Unicode path name has to fit in any SMB/CIFS path based frames */
+		CIFSMaxBufSize = 8192;
+	} else if (CIFSMaxBufSize > 1024*127) {
+		CIFSMaxBufSize = 1024 * 127;
+	} else {
+		CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
+	}
+/*
+	cifs_dbg(VFS, "CIFSMaxBufSize %d 0x%x\n",
+		 CIFSMaxBufSize, CIFSMaxBufSize);
+*/
+	cifs_req_cachep = kmem_cache_create_usercopy("cifs_request",
+					    CIFSMaxBufSize + max_hdr_size, 0,
+					    SLAB_HWCACHE_ALIGN, 0,
+					    CIFSMaxBufSize + max_hdr_size,
+					    NULL);
+	if (cifs_req_cachep == NULL)
+		return -ENOMEM;
+
+	if (cifs_min_rcv < 1)
+		cifs_min_rcv = 1;
+	else if (cifs_min_rcv > 64) {
+		cifs_min_rcv = 64;
+		cifs_dbg(VFS, "cifs_min_rcv set to maximum (64)\n");
+	}
+
+	cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
+						  cifs_req_cachep);
+
+	if (cifs_req_poolp == NULL) {
+		kmem_cache_destroy(cifs_req_cachep);
+		return -ENOMEM;
+	}
+	/* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
+	almost all handle based requests (but not write response, nor is it
+	sufficient for path based requests).  A smaller size would have
+	been more efficient (compacting multiple slab items on one 4k page)
+	for the case in which debug was on, but this larger size allows
+	more SMBs to use small buffer alloc and is still much more
+	efficient to alloc 1 per page off the slab compared to 17K (5page)
+	alloc of large cifs buffers even when page debugging is on */
+	cifs_sm_req_cachep = kmem_cache_create_usercopy("cifs_small_rq",
+			MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
+			0, MAX_CIFS_SMALL_BUFFER_SIZE, NULL);
+	if (cifs_sm_req_cachep == NULL) {
+		mempool_destroy(cifs_req_poolp);
+		kmem_cache_destroy(cifs_req_cachep);
+		return -ENOMEM;
+	}
+
+	if (cifs_min_small < 2)
+		cifs_min_small = 2;
+	else if (cifs_min_small > 256) {
+		cifs_min_small = 256;
+		cifs_dbg(FYI, "cifs_min_small set to maximum (256)\n");
+	}
+
+	cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
+						     cifs_sm_req_cachep);
+
+	if (cifs_sm_req_poolp == NULL) {
+		mempool_destroy(cifs_req_poolp);
+		kmem_cache_destroy(cifs_req_cachep);
+		kmem_cache_destroy(cifs_sm_req_cachep);
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+static void
+cifs_destroy_request_bufs(void)
+{
+	mempool_destroy(cifs_req_poolp);
+	kmem_cache_destroy(cifs_req_cachep);
+	mempool_destroy(cifs_sm_req_poolp);
+	kmem_cache_destroy(cifs_sm_req_cachep);
+}
+
+static int init_mids(void)
+{
+	cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
+					    sizeof(struct mid_q_entry), 0,
+					    SLAB_HWCACHE_ALIGN, NULL);
+	if (cifs_mid_cachep == NULL)
+		return -ENOMEM;
+
+	/* 3 is a reasonable minimum number of simultaneous operations */
+	cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
+	if (cifs_mid_poolp == NULL) {
+		kmem_cache_destroy(cifs_mid_cachep);
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+static void destroy_mids(void)
+{
+	mempool_destroy(cifs_mid_poolp);
+	kmem_cache_destroy(cifs_mid_cachep);
+}
+
+static int __init
+init_cifs(void)
+{
+	int rc = 0;
+	cifs_proc_init();
+	INIT_LIST_HEAD(&cifs_tcp_ses_list);
+/*
+ *  Initialize Global counters
+ */
+	atomic_set(&sesInfoAllocCount, 0);
+	atomic_set(&tconInfoAllocCount, 0);
+	atomic_set(&tcpSesNextId, 0);
+	atomic_set(&tcpSesAllocCount, 0);
+	atomic_set(&tcpSesReconnectCount, 0);
+	atomic_set(&tconInfoReconnectCount, 0);
+
+	atomic_set(&buf_alloc_count, 0);
+	atomic_set(&small_buf_alloc_count, 0);
+#ifdef CONFIG_CIFS_STATS2
+	atomic_set(&total_buf_alloc_count, 0);
+	atomic_set(&total_small_buf_alloc_count, 0);
+	if (slow_rsp_threshold < 1)
+		cifs_dbg(FYI, "slow_response_threshold msgs disabled\n");
+	else if (slow_rsp_threshold > 32767)
+		cifs_dbg(VFS,
+		       "slow response threshold set higher than recommended (0 to 32767)\n");
+#endif /* CONFIG_CIFS_STATS2 */
+
+	atomic_set(&mid_count, 0);
+	GlobalCurrentXid = 0;
+	GlobalTotalActiveXid = 0;
+	GlobalMaxActiveXid = 0;
+	spin_lock_init(&cifs_tcp_ses_lock);
+	spin_lock_init(&GlobalMid_Lock);
+
+	cifs_lock_secret = get_random_u32();
+
+	if (cifs_max_pending < 2) {
+		cifs_max_pending = 2;
+		cifs_dbg(FYI, "cifs_max_pending set to min of 2\n");
+	} else if (cifs_max_pending > CIFS_MAX_REQ) {
+		cifs_max_pending = CIFS_MAX_REQ;
+		cifs_dbg(FYI, "cifs_max_pending set to max of %u\n",
+			 CIFS_MAX_REQ);
+	}
+
+	/* Limit max to about 18 hours, and setting to zero disables directory entry caching */
+	if (dir_cache_timeout > 65000) {
+		dir_cache_timeout = 65000;
+		cifs_dbg(VFS, "dir_cache_timeout set to max of 65000 seconds\n");
+	}
+
+	cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
+	if (!cifsiod_wq) {
+		rc = -ENOMEM;
+		goto out_clean_proc;
+	}
+
+	/*
+	 * Consider in future setting limit!=0 maybe to min(num_of_cores - 1, 3)
+	 * so that we don't launch too many worker threads but
+	 * Documentation/core-api/workqueue.rst recommends setting it to 0
+	 */
+
+	/* WQ_UNBOUND allows decrypt tasks to run on any CPU */
+	decrypt_wq = alloc_workqueue("smb3decryptd",
+				     WQ_UNBOUND|WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
+	if (!decrypt_wq) {
+		rc = -ENOMEM;
+		goto out_destroy_cifsiod_wq;
+	}
+
+	fileinfo_put_wq = alloc_workqueue("cifsfileinfoput",
+				     WQ_UNBOUND|WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
+	if (!fileinfo_put_wq) {
+		rc = -ENOMEM;
+		goto out_destroy_decrypt_wq;
+	}
+
+	cifsoplockd_wq = alloc_workqueue("cifsoplockd",
+					 WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
+	if (!cifsoplockd_wq) {
+		rc = -ENOMEM;
+		goto out_destroy_fileinfo_put_wq;
+	}
+
+	deferredclose_wq = alloc_workqueue("deferredclose",
+					   WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
+	if (!deferredclose_wq) {
+		rc = -ENOMEM;
+		goto out_destroy_cifsoplockd_wq;
+	}
+
+	rc = cifs_init_inodecache();
+	if (rc)
+		goto out_destroy_deferredclose_wq;
+
+	rc = init_mids();
+	if (rc)
+		goto out_destroy_inodecache;
+
+	rc = cifs_init_request_bufs();
+	if (rc)
+		goto out_destroy_mids;
+
+#ifdef CONFIG_CIFS_DFS_UPCALL
+	rc = dfs_cache_init();
+	if (rc)
+		goto out_destroy_request_bufs;
+#endif /* CONFIG_CIFS_DFS_UPCALL */
+#ifdef CONFIG_CIFS_UPCALL
+	rc = init_cifs_spnego();
+	if (rc)
+		goto out_destroy_dfs_cache;
+#endif /* CONFIG_CIFS_UPCALL */
+#ifdef CONFIG_CIFS_SWN_UPCALL
+	rc = cifs_genl_init();
+	if (rc)
+		goto out_register_key_type;
+#endif /* CONFIG_CIFS_SWN_UPCALL */
+
+	rc = init_cifs_idmap();
+	if (rc)
+		goto out_cifs_swn_init;
+
+	rc = register_filesystem(&cifs_fs_type);
+	if (rc)
+		goto out_init_cifs_idmap;
+
+	rc = register_filesystem(&smb3_fs_type);
+	if (rc) {
+		unregister_filesystem(&cifs_fs_type);
+		goto out_init_cifs_idmap;
+	}
+
+	return 0;
+
+out_init_cifs_idmap:
+	exit_cifs_idmap();
+out_cifs_swn_init:
+#ifdef CONFIG_CIFS_SWN_UPCALL
+	cifs_genl_exit();
+out_register_key_type:
+#endif
+#ifdef CONFIG_CIFS_UPCALL
+	exit_cifs_spnego();
+out_destroy_dfs_cache:
+#endif
+#ifdef CONFIG_CIFS_DFS_UPCALL
+	dfs_cache_destroy();
+out_destroy_request_bufs:
+#endif
+	cifs_destroy_request_bufs();
+out_destroy_mids:
+	destroy_mids();
+out_destroy_inodecache:
+	cifs_destroy_inodecache();
+out_destroy_deferredclose_wq:
+	destroy_workqueue(deferredclose_wq);
+out_destroy_cifsoplockd_wq:
+	destroy_workqueue(cifsoplockd_wq);
+out_destroy_fileinfo_put_wq:
+	destroy_workqueue(fileinfo_put_wq);
+out_destroy_decrypt_wq:
+	destroy_workqueue(decrypt_wq);
+out_destroy_cifsiod_wq:
+	destroy_workqueue(cifsiod_wq);
+out_clean_proc:
+	cifs_proc_clean();
+	return rc;
+}
+
+static void __exit
+exit_cifs(void)
+{
+	cifs_dbg(NOISY, "exit_smb3\n");
+	unregister_filesystem(&cifs_fs_type);
+	unregister_filesystem(&smb3_fs_type);
+	cifs_release_automount_timer();
+	exit_cifs_idmap();
+#ifdef CONFIG_CIFS_SWN_UPCALL
+	cifs_genl_exit();
+#endif
+#ifdef CONFIG_CIFS_UPCALL
+	exit_cifs_spnego();
+#endif
+#ifdef CONFIG_CIFS_DFS_UPCALL
+	dfs_cache_destroy();
+#endif
+	cifs_destroy_request_bufs();
+	destroy_mids();
+	cifs_destroy_inodecache();
+	destroy_workqueue(deferredclose_wq);
+	destroy_workqueue(cifsoplockd_wq);
+	destroy_workqueue(decrypt_wq);
+	destroy_workqueue(fileinfo_put_wq);
+	destroy_workqueue(cifsiod_wq);
+	cifs_proc_clean();
+}
+
+MODULE_AUTHOR("Steve French");
+MODULE_LICENSE("GPL");	/* combination of LGPL + GPL source behaves as GPL */
+MODULE_DESCRIPTION
+	("VFS to access SMB3 servers e.g. Samba, Macs, Azure and Windows (and "
+	"also older servers complying with the SNIA CIFS Specification)");
+MODULE_VERSION(CIFS_VERSION);
+MODULE_SOFTDEP("ecb");
+MODULE_SOFTDEP("hmac");
+MODULE_SOFTDEP("md5");
+MODULE_SOFTDEP("nls");
+MODULE_SOFTDEP("aes");
+MODULE_SOFTDEP("cmac");
+MODULE_SOFTDEP("sha256");
+MODULE_SOFTDEP("sha512");
+MODULE_SOFTDEP("aead2");
+MODULE_SOFTDEP("ccm");
+MODULE_SOFTDEP("gcm");
+module_init(init_cifs)
+module_exit(exit_cifs)
diff --git a/fs/smb/client/cifsfs.h b/fs/smb/client/cifsfs.h
new file mode 100644
index 0000000000..41daebd220
--- /dev/null
+++ b/fs/smb/client/cifsfs.h
@@ -0,0 +1,157 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+/*
+ *
+ *   Copyright (c) International Business Machines  Corp., 2002, 2007
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ */
+
+#ifndef _CIFSFS_H
+#define _CIFSFS_H
+
+#include <linux/hash.h>
+
+#define ROOT_I 2
+
+/*
+ * ino_t is 32-bits on 32-bit arch. We have to squash the 64-bit value down
+ * so that it will fit. We use hash_64 to convert the value to 31 bits, and
+ * then add 1, to ensure that we don't end up with a 0 as the value.
+ */
+static inline ino_t
+cifs_uniqueid_to_ino_t(u64 fileid)
+{
+	if ((sizeof(ino_t)) < (sizeof(u64)))
+		return (ino_t)hash_64(fileid, (sizeof(ino_t) * 8) - 1) + 1;
+
+	return (ino_t)fileid;
+
+}
+
+static inline void cifs_set_time(struct dentry *dentry, unsigned long time)
+{
+	dentry->d_fsdata = (void *) time;
+}
+
+static inline unsigned long cifs_get_time(struct dentry *dentry)
+{
+	return (unsigned long) dentry->d_fsdata;
+}
+
+extern struct file_system_type cifs_fs_type, smb3_fs_type;
+extern const struct address_space_operations cifs_addr_ops;
+extern const struct address_space_operations cifs_addr_ops_smallbuf;
+
+/* Functions related to super block operations */
+extern void cifs_sb_active(struct super_block *sb);
+extern void cifs_sb_deactive(struct super_block *sb);
+
+/* Functions related to inodes */
+extern const struct inode_operations cifs_dir_inode_ops;
+extern struct inode *cifs_root_iget(struct super_block *);
+extern int cifs_create(struct mnt_idmap *, struct inode *,
+		       struct dentry *, umode_t, bool excl);
+extern int cifs_atomic_open(struct inode *, struct dentry *,
+			    struct file *, unsigned, umode_t);
+extern struct dentry *cifs_lookup(struct inode *, struct dentry *,
+				  unsigned int);
+extern int cifs_unlink(struct inode *dir, struct dentry *dentry);
+extern int cifs_hardlink(struct dentry *, struct inode *, struct dentry *);
+extern int cifs_mknod(struct mnt_idmap *, struct inode *, struct dentry *,
+		      umode_t, dev_t);
+extern int cifs_mkdir(struct mnt_idmap *, struct inode *, struct dentry *,
+		      umode_t);
+extern int cifs_rmdir(struct inode *, struct dentry *);
+extern int cifs_rename2(struct mnt_idmap *, struct inode *,
+			struct dentry *, struct inode *, struct dentry *,
+			unsigned int);
+extern int cifs_revalidate_file_attr(struct file *filp);
+extern int cifs_revalidate_dentry_attr(struct dentry *);
+extern int cifs_revalidate_file(struct file *filp);
+extern int cifs_revalidate_dentry(struct dentry *);
+extern int cifs_invalidate_mapping(struct inode *inode);
+extern int cifs_revalidate_mapping(struct inode *inode);
+extern int cifs_zap_mapping(struct inode *inode);
+extern int cifs_getattr(struct mnt_idmap *, const struct path *,
+			struct kstat *, u32, unsigned int);
+extern int cifs_setattr(struct mnt_idmap *, struct dentry *,
+			struct iattr *);
+extern int cifs_fiemap(struct inode *, struct fiemap_extent_info *, u64 start,
+		       u64 len);
+
+extern const struct inode_operations cifs_file_inode_ops;
+extern const struct inode_operations cifs_symlink_inode_ops;
+extern const struct inode_operations cifs_namespace_inode_operations;
+
+
+/* Functions related to files and directories */
+extern const struct file_operations cifs_file_ops;
+extern const struct file_operations cifs_file_direct_ops; /* if directio mnt */
+extern const struct file_operations cifs_file_strict_ops; /* if strictio mnt */
+extern const struct file_operations cifs_file_nobrl_ops; /* no brlocks */
+extern const struct file_operations cifs_file_direct_nobrl_ops;
+extern const struct file_operations cifs_file_strict_nobrl_ops;
+extern int cifs_open(struct inode *inode, struct file *file);
+extern int cifs_close(struct inode *inode, struct file *file);
+extern int cifs_closedir(struct inode *inode, struct file *file);
+extern ssize_t cifs_user_readv(struct kiocb *iocb, struct iov_iter *to);
+extern ssize_t cifs_direct_readv(struct kiocb *iocb, struct iov_iter *to);
+extern ssize_t cifs_strict_readv(struct kiocb *iocb, struct iov_iter *to);
+extern ssize_t cifs_user_writev(struct kiocb *iocb, struct iov_iter *from);
+extern ssize_t cifs_direct_writev(struct kiocb *iocb, struct iov_iter *from);
+extern ssize_t cifs_strict_writev(struct kiocb *iocb, struct iov_iter *from);
+extern int cifs_flock(struct file *pfile, int cmd, struct file_lock *plock);
+extern int cifs_lock(struct file *, int, struct file_lock *);
+extern int cifs_fsync(struct file *, loff_t, loff_t, int);
+extern int cifs_strict_fsync(struct file *, loff_t, loff_t, int);
+extern int cifs_flush(struct file *, fl_owner_t id);
+extern int cifs_file_mmap(struct file *file, struct vm_area_struct *vma);
+extern int cifs_file_strict_mmap(struct file *file, struct vm_area_struct *vma);
+extern const struct file_operations cifs_dir_ops;
+extern int cifs_dir_open(struct inode *inode, struct file *file);
+extern int cifs_readdir(struct file *file, struct dir_context *ctx);
+extern void cifs_pages_written_back(struct inode *inode, loff_t start, unsigned int len);
+extern void cifs_pages_write_failed(struct inode *inode, loff_t start, unsigned int len);
+extern void cifs_pages_write_redirty(struct inode *inode, loff_t start, unsigned int len);
+
+/* Functions related to dir entries */
+extern const struct dentry_operations cifs_dentry_ops;
+extern const struct dentry_operations cifs_ci_dentry_ops;
+
+extern struct vfsmount *cifs_d_automount(struct path *path);
+
+/* Functions related to symlinks */
+extern const char *cifs_get_link(struct dentry *, struct inode *,
+			struct delayed_call *);
+extern int cifs_symlink(struct mnt_idmap *idmap, struct inode *inode,
+			struct dentry *direntry, const char *symname);
+
+#ifdef CONFIG_CIFS_XATTR
+extern const struct xattr_handler *cifs_xattr_handlers[];
+extern ssize_t	cifs_listxattr(struct dentry *, char *, size_t);
+#else
+# define cifs_xattr_handlers NULL
+# define cifs_listxattr NULL
+#endif
+
+extern ssize_t cifs_file_copychunk_range(unsigned int xid,
+					struct file *src_file, loff_t off,
+					struct file *dst_file, loff_t destoff,
+					size_t len, unsigned int flags);
+
+extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
+extern void cifs_setsize(struct inode *inode, loff_t offset);
+extern int cifs_truncate_page(struct address_space *mapping, loff_t from);
+
+struct smb3_fs_context;
+extern struct dentry *cifs_smb3_do_mount(struct file_system_type *fs_type,
+					 int flags, struct smb3_fs_context *ctx);
+
+#ifdef CONFIG_CIFS_NFSD_EXPORT
+extern const struct export_operations cifs_export_ops;
+#endif /* CONFIG_CIFS_NFSD_EXPORT */
+
+/* when changing internal version - update following two lines at same time */
+#define SMB3_PRODUCT_BUILD 45
+#define CIFS_VERSION   "2.45"
+#endif				/* _CIFSFS_H */
diff --git a/fs/smb/client/cifsglob.h b/fs/smb/client/cifsglob.h
new file mode 100644
index 0000000000..5e32c79f03
--- /dev/null
+++ b/fs/smb/client/cifsglob.h
@@ -0,0 +1,2252 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+/*
+ *
+ *   Copyright (C) International Business Machines  Corp., 2002,2008
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *              Jeremy Allison (jra@samba.org)
+ *
+ */
+#ifndef _CIFS_GLOB_H
+#define _CIFS_GLOB_H
+
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <linux/inet.h>
+#include <linux/slab.h>
+#include <linux/scatterlist.h>
+#include <linux/mm.h>
+#include <linux/mempool.h>
+#include <linux/workqueue.h>
+#include <linux/utsname.h>
+#include <linux/sched/mm.h>
+#include <linux/netfs.h>
+#include "cifs_fs_sb.h"
+#include "cifsacl.h"
+#include <crypto/internal/hash.h>
+#include <uapi/linux/cifs/cifs_mount.h>
+#include "../common/smb2pdu.h"
+#include "smb2pdu.h"
+#include <linux/filelock.h>
+
+#define SMB_PATH_MAX 260
+#define CIFS_PORT 445
+#define RFC1001_PORT 139
+
+/*
+ * The sizes of various internal tables and strings
+ */
+#define MAX_UID_INFO 16
+#define MAX_SES_INFO 2
+#define MAX_TCON_INFO 4
+
+#define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1)
+
+#define CIFS_MIN_RCV_POOL 4
+
+#define MAX_REOPEN_ATT	5 /* these many maximum attempts to reopen a file */
+/*
+ * default attribute cache timeout (jiffies)
+ */
+#define CIFS_DEF_ACTIMEO (1 * HZ)
+
+/*
+ * max attribute cache timeout (jiffies) - 2^30
+ */
+#define CIFS_MAX_ACTIMEO (1 << 30)
+
+/*
+ * Max persistent and resilient handle timeout (milliseconds).
+ * Windows durable max was 960000 (16 minutes)
+ */
+#define SMB3_MAX_HANDLE_TIMEOUT 960000
+
+/*
+ * MAX_REQ is the maximum number of requests that WE will send
+ * on one socket concurrently.
+ */
+#define CIFS_MAX_REQ 32767
+
+#define RFC1001_NAME_LEN 15
+#define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
+
+/* maximum length of ip addr as a string (including ipv6 and sctp) */
+#define SERVER_NAME_LENGTH 80
+#define SERVER_NAME_LEN_WITH_NULL     (SERVER_NAME_LENGTH + 1)
+
+/* echo interval in seconds */
+#define SMB_ECHO_INTERVAL_MIN 1
+#define SMB_ECHO_INTERVAL_MAX 600
+#define SMB_ECHO_INTERVAL_DEFAULT 60
+
+/* smb multichannel query server interfaces interval in seconds */
+#define SMB_INTERFACE_POLL_INTERVAL	600
+
+/* maximum number of PDUs in one compound */
+#define MAX_COMPOUND 5
+
+/*
+ * Default number of credits to keep available for SMB3.
+ * This value is chosen somewhat arbitrarily. The Windows client
+ * defaults to 128 credits, the Windows server allows clients up to
+ * 512 credits (or 8K for later versions), and the NetApp server
+ * does not limit clients at all.  Choose a high enough default value
+ * such that the client shouldn't limit performance, but allow mount
+ * to override (until you approach 64K, where we limit credits to 65000
+ * to reduce possibility of seeing more server credit overflow bugs.
+ */
+#define SMB2_MAX_CREDITS_AVAILABLE 32000
+
+#include "cifspdu.h"
+
+#ifndef XATTR_DOS_ATTRIB
+#define XATTR_DOS_ATTRIB "user.DOSATTRIB"
+#endif
+
+#define CIFS_MAX_WORKSTATION_LEN  (__NEW_UTS_LEN + 1)  /* reasonable max for client */
+
+#define CIFS_DFS_ROOT_SES(ses) ((ses)->dfs_root_ses ?: (ses))
+
+/*
+ * CIFS vfs client Status information (based on what we know.)
+ */
+
+/* associated with each connection */
+enum statusEnum {
+	CifsNew = 0,
+	CifsGood,
+	CifsExiting,
+	CifsNeedReconnect,
+	CifsNeedNegotiate,
+	CifsInNegotiate,
+};
+
+/* associated with each smb session */
+enum ses_status_enum {
+	SES_NEW = 0,
+	SES_GOOD,
+	SES_EXITING,
+	SES_NEED_RECON,
+	SES_IN_SETUP
+};
+
+/* associated with each tree connection to the server */
+enum tid_status_enum {
+	TID_NEW = 0,
+	TID_GOOD,
+	TID_EXITING,
+	TID_NEED_RECON,
+	TID_NEED_TCON,
+	TID_IN_TCON,
+	TID_NEED_FILES_INVALIDATE, /* currently unused */
+	TID_IN_FILES_INVALIDATE
+};
+
+enum securityEnum {
+	Unspecified = 0,	/* not specified */
+	NTLMv2,			/* Legacy NTLM auth with NTLMv2 hash */
+	RawNTLMSSP,		/* NTLMSSP without SPNEGO, NTLMv2 hash */
+	Kerberos,		/* Kerberos via SPNEGO */
+};
+
+struct session_key {
+	unsigned int len;
+	char *response;
+};
+
+/* crypto hashing related structure/fields, not specific to a sec mech */
+struct cifs_secmech {
+	struct shash_desc *hmacmd5; /* hmacmd5 hash function, for NTLMv2/CR1 hashes */
+	struct shash_desc *md5; /* md5 hash function, for CIFS/SMB1 signatures */
+	struct shash_desc *hmacsha256; /* hmac-sha256 hash function, for SMB2 signatures */
+	struct shash_desc *sha512; /* sha512 hash function, for SMB3.1.1 preauth hash */
+	struct shash_desc *aes_cmac; /* block-cipher based MAC function, for SMB3 signatures */
+
+	struct crypto_aead *enc; /* smb3 encryption AEAD TFM (AES-CCM and AES-GCM) */
+	struct crypto_aead *dec; /* smb3 decryption AEAD TFM (AES-CCM and AES-GCM) */
+};
+
+/* per smb session structure/fields */
+struct ntlmssp_auth {
+	bool sesskey_per_smbsess; /* whether session key is per smb session */
+	__u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
+	__u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
+	unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
+	char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
+};
+
+struct cifs_cred {
+	int uid;
+	int gid;
+	int mode;
+	int cecount;
+	struct cifs_sid osid;
+	struct cifs_sid gsid;
+	struct cifs_ntace *ntaces;
+	struct cifs_ace *aces;
+};
+
+struct cifs_open_info_data {
+	bool adjust_tz;
+	union {
+		bool reparse_point;
+		bool symlink;
+	};
+	struct {
+		__u32 tag;
+		union {
+			struct reparse_data_buffer *buf;
+			struct reparse_posix_data *posix;
+		};
+	} reparse;
+	char *symlink_target;
+	union {
+		struct smb2_file_all_info fi;
+		struct smb311_posix_qinfo posix_fi;
+	};
+};
+
+#define cifs_open_data_reparse(d) \
+	((d)->reparse_point || \
+	 (le32_to_cpu((d)->fi.Attributes) & ATTR_REPARSE))
+
+static inline void cifs_free_open_info(struct cifs_open_info_data *data)
+{
+	kfree(data->symlink_target);
+}
+
+/*
+ *****************************************************************
+ * Except the CIFS PDUs themselves all the
+ * globally interesting structs should go here
+ *****************************************************************
+ */
+
+/*
+ * A smb_rqst represents a complete request to be issued to a server. It's
+ * formed by a kvec array, followed by an array of pages. Page data is assumed
+ * to start at the beginning of the first page.
+ */
+struct smb_rqst {
+	struct kvec	*rq_iov;	/* array of kvecs */
+	unsigned int	rq_nvec;	/* number of kvecs in array */
+	size_t		rq_iter_size;	/* Amount of data in ->rq_iter */
+	struct iov_iter	rq_iter;	/* Data iterator */
+	struct xarray	rq_buffer;	/* Page buffer for encryption */
+};
+
+struct mid_q_entry;
+struct TCP_Server_Info;
+struct cifsFileInfo;
+struct cifs_ses;
+struct cifs_tcon;
+struct dfs_info3_param;
+struct cifs_fattr;
+struct smb3_fs_context;
+struct cifs_fid;
+struct cifs_readdata;
+struct cifs_writedata;
+struct cifs_io_parms;
+struct cifs_search_info;
+struct cifsInodeInfo;
+struct cifs_open_parms;
+struct cifs_credits;
+
+struct smb_version_operations {
+	int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *,
+			   struct mid_q_entry *);
+	bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
+	/* setup request: allocate mid, sign message */
+	struct mid_q_entry *(*setup_request)(struct cifs_ses *,
+					     struct TCP_Server_Info *,
+					     struct smb_rqst *);
+	/* setup async request: allocate mid, sign message */
+	struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
+						struct smb_rqst *);
+	/* check response: verify signature, map error */
+	int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
+			     bool);
+	void (*add_credits)(struct TCP_Server_Info *server,
+			    const struct cifs_credits *credits,
+			    const int optype);
+	void (*set_credits)(struct TCP_Server_Info *, const int);
+	int * (*get_credits_field)(struct TCP_Server_Info *, const int);
+	unsigned int (*get_credits)(struct mid_q_entry *);
+	__u64 (*get_next_mid)(struct TCP_Server_Info *);
+	void (*revert_current_mid)(struct TCP_Server_Info *server,
+				   const unsigned int val);
+	/* data offset from read response message */
+	unsigned int (*read_data_offset)(char *);
+	/*
+	 * Data length from read response message
+	 * When in_remaining is true, the returned data length is in
+	 * message field DataRemaining for out-of-band data read (e.g through
+	 * Memory Registration RDMA write in SMBD).
+	 * Otherwise, the returned data length is in message field DataLength.
+	 */
+	unsigned int (*read_data_length)(char *, bool in_remaining);
+	/* map smb to linux error */
+	int (*map_error)(char *, bool);
+	/* find mid corresponding to the response message */
+	struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
+	void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info);
+	void (*clear_stats)(struct cifs_tcon *);
+	void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
+	void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
+	/* verify the message */
+	int (*check_message)(char *, unsigned int, struct TCP_Server_Info *);
+	bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
+	int (*handle_cancelled_mid)(struct mid_q_entry *, struct TCP_Server_Info *);
+	void (*downgrade_oplock)(struct TCP_Server_Info *server,
+				 struct cifsInodeInfo *cinode, __u32 oplock,
+				 unsigned int epoch, bool *purge_cache);
+	/* process transaction2 response */
+	bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
+			     char *, int);
+	/* check if we need to negotiate */
+	bool (*need_neg)(struct TCP_Server_Info *);
+	/* negotiate to the server */
+	int (*negotiate)(const unsigned int xid,
+			 struct cifs_ses *ses,
+			 struct TCP_Server_Info *server);
+	/* set negotiated write size */
+	unsigned int (*negotiate_wsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx);
+	/* set negotiated read size */
+	unsigned int (*negotiate_rsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx);
+	/* setup smb sessionn */
+	int (*sess_setup)(const unsigned int, struct cifs_ses *,
+			  struct TCP_Server_Info *server,
+			  const struct nls_table *);
+	/* close smb session */
+	int (*logoff)(const unsigned int, struct cifs_ses *);
+	/* connect to a server share */
+	int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
+			    struct cifs_tcon *, const struct nls_table *);
+	/* close tree connecion */
+	int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
+	/* get DFS referrals */
+	int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
+			     const char *, struct dfs_info3_param **,
+			     unsigned int *, const struct nls_table *, int);
+	/* informational QFS call */
+	void (*qfs_tcon)(const unsigned int, struct cifs_tcon *,
+			 struct cifs_sb_info *);
+	/* check if a path is accessible or not */
+	int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
+				  struct cifs_sb_info *, const char *);
+	/* query path data from the server */
+	int (*query_path_info)(const unsigned int xid,
+			       struct cifs_tcon *tcon,
+			       struct cifs_sb_info *cifs_sb,
+			       const char *full_path,
+			       struct cifs_open_info_data *data);
+	/* query file data from the server */
+	int (*query_file_info)(const unsigned int xid, struct cifs_tcon *tcon,
+			       struct cifsFileInfo *cfile, struct cifs_open_info_data *data);
+	/* query reparse point to determine which type of special file */
+	int (*query_reparse_point)(const unsigned int xid,
+				   struct cifs_tcon *tcon,
+				   struct cifs_sb_info *cifs_sb,
+				   const char *full_path,
+				   u32 *tag, struct kvec *rsp,
+				   int *rsp_buftype);
+	/* get server index number */
+	int (*get_srv_inum)(const unsigned int xid, struct cifs_tcon *tcon,
+			    struct cifs_sb_info *cifs_sb, const char *full_path, u64 *uniqueid,
+			    struct cifs_open_info_data *data);
+	/* set size by path */
+	int (*set_path_size)(const unsigned int, struct cifs_tcon *,
+			     const char *, __u64, struct cifs_sb_info *, bool);
+	/* set size by file handle */
+	int (*set_file_size)(const unsigned int, struct cifs_tcon *,
+			     struct cifsFileInfo *, __u64, bool);
+	/* set attributes */
+	int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
+			     const unsigned int);
+	int (*set_compression)(const unsigned int, struct cifs_tcon *,
+			       struct cifsFileInfo *);
+	/* check if we can send an echo or nor */
+	bool (*can_echo)(struct TCP_Server_Info *);
+	/* send echo request */
+	int (*echo)(struct TCP_Server_Info *);
+	/* create directory */
+	int (*posix_mkdir)(const unsigned int xid, struct inode *inode,
+			umode_t mode, struct cifs_tcon *tcon,
+			const char *full_path,
+			struct cifs_sb_info *cifs_sb);
+	int (*mkdir)(const unsigned int xid, struct inode *inode, umode_t mode,
+		     struct cifs_tcon *tcon, const char *name,
+		     struct cifs_sb_info *sb);
+	/* set info on created directory */
+	void (*mkdir_setinfo)(struct inode *, const char *,
+			      struct cifs_sb_info *, struct cifs_tcon *,
+			      const unsigned int);
+	/* remove directory */
+	int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
+		     struct cifs_sb_info *);
+	/* unlink file */
+	int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
+		      struct cifs_sb_info *);
+	/* open, rename and delete file */
+	int (*rename_pending_delete)(const char *, struct dentry *,
+				     const unsigned int);
+	/* send rename request */
+	int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
+		      const char *, struct cifs_sb_info *);
+	/* send create hardlink request */
+	int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
+			       const char *, const char *,
+			       struct cifs_sb_info *);
+	/* query symlink target */
+	int (*query_symlink)(const unsigned int xid,
+			     struct cifs_tcon *tcon,
+			     struct cifs_sb_info *cifs_sb,
+			     const char *full_path,
+			     char **target_path);
+	/* open a file for non-posix mounts */
+	int (*open)(const unsigned int xid, struct cifs_open_parms *oparms, __u32 *oplock,
+		    void *buf);
+	/* set fid protocol-specific info */
+	void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
+	/* close a file */
+	void (*close)(const unsigned int, struct cifs_tcon *,
+		      struct cifs_fid *);
+	/* close a file, returning file attributes and timestamps */
+	void (*close_getattr)(const unsigned int xid, struct cifs_tcon *tcon,
+		      struct cifsFileInfo *pfile_info);
+	/* send a flush request to the server */
+	int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
+	/* async read from the server */
+	int (*async_readv)(struct cifs_readdata *);
+	/* async write to the server */
+	int (*async_writev)(struct cifs_writedata *,
+			    void (*release)(struct kref *));
+	/* sync read from the server */
+	int (*sync_read)(const unsigned int, struct cifs_fid *,
+			 struct cifs_io_parms *, unsigned int *, char **,
+			 int *);
+	/* sync write to the server */
+	int (*sync_write)(const unsigned int, struct cifs_fid *,
+			  struct cifs_io_parms *, unsigned int *, struct kvec *,
+			  unsigned long);
+	/* open dir, start readdir */
+	int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
+			       const char *, struct cifs_sb_info *,
+			       struct cifs_fid *, __u16,
+			       struct cifs_search_info *);
+	/* continue readdir */
+	int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
+			      struct cifs_fid *,
+			      __u16, struct cifs_search_info *srch_inf);
+	/* close dir */
+	int (*close_dir)(const unsigned int, struct cifs_tcon *,
+			 struct cifs_fid *);
+	/* calculate a size of SMB message */
+	unsigned int (*calc_smb_size)(void *buf);
+	/* check for STATUS_PENDING and process the response if yes */
+	bool (*is_status_pending)(char *buf, struct TCP_Server_Info *server);
+	/* check for STATUS_NETWORK_SESSION_EXPIRED */
+	bool (*is_session_expired)(char *);
+	/* send oplock break response */
+	int (*oplock_response)(struct cifs_tcon *tcon, __u64 persistent_fid, __u64 volatile_fid,
+			__u16 net_fid, struct cifsInodeInfo *cifs_inode);
+	/* query remote filesystem */
+	int (*queryfs)(const unsigned int, struct cifs_tcon *,
+		       struct cifs_sb_info *, struct kstatfs *);
+	/* send mandatory brlock to the server */
+	int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
+			 __u64, __u32, int, int, bool);
+	/* unlock range of mandatory locks */
+	int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
+				 const unsigned int);
+	/* push brlocks from the cache to the server */
+	int (*push_mand_locks)(struct cifsFileInfo *);
+	/* get lease key of the inode */
+	void (*get_lease_key)(struct inode *, struct cifs_fid *);
+	/* set lease key of the inode */
+	void (*set_lease_key)(struct inode *, struct cifs_fid *);
+	/* generate new lease key */
+	void (*new_lease_key)(struct cifs_fid *);
+	int (*generate_signingkey)(struct cifs_ses *ses,
+				   struct TCP_Server_Info *server);
+	int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *,
+				bool allocate_crypto);
+	int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
+			     struct cifsFileInfo *src_file);
+	int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon,
+			     struct cifsFileInfo *src_file, void __user *);
+	int (*notify)(const unsigned int xid, struct file *pfile,
+			     void __user *pbuf, bool return_changes);
+	int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
+				struct cifs_sb_info *, const unsigned char *,
+				char *, unsigned int *);
+	int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
+				 struct cifs_sb_info *, const unsigned char *,
+				 char *, unsigned int *);
+	/* if we can do cache read operations */
+	bool (*is_read_op)(__u32);
+	/* set oplock level for the inode */
+	void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
+				 bool *);
+	/* create lease context buffer for CREATE request */
+	char * (*create_lease_buf)(u8 *lease_key, u8 oplock);
+	/* parse lease context buffer and return oplock/epoch info */
+	__u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey);
+	ssize_t (*copychunk_range)(const unsigned int,
+			struct cifsFileInfo *src_file,
+			struct cifsFileInfo *target_file,
+			u64 src_off, u64 len, u64 dest_off);
+	int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src,
+			struct cifsFileInfo *target_file, u64 src_off, u64 len,
+			u64 dest_off);
+	int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
+	ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
+			const unsigned char *, const unsigned char *, char *,
+			size_t, struct cifs_sb_info *);
+	int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
+			const char *, const void *, const __u16,
+			const struct nls_table *, struct cifs_sb_info *);
+	struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
+			const char *, u32 *, u32);
+	struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
+			const struct cifs_fid *, u32 *, u32);
+	int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
+			int);
+	/* writepages retry size */
+	unsigned int (*wp_retry_size)(struct inode *);
+	/* get mtu credits */
+	int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
+				unsigned int *, struct cifs_credits *);
+	/* adjust previously taken mtu credits to request size */
+	int (*adjust_credits)(struct TCP_Server_Info *server,
+			      struct cifs_credits *credits,
+			      const unsigned int payload_size);
+	/* check if we need to issue closedir */
+	bool (*dir_needs_close)(struct cifsFileInfo *);
+	long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
+			  loff_t);
+	/* init transform request - used for encryption for now */
+	int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst,
+				 struct smb_rqst *, struct smb_rqst *);
+	int (*is_transform_hdr)(void *buf);
+	int (*receive_transform)(struct TCP_Server_Info *,
+				 struct mid_q_entry **, char **, int *);
+	enum securityEnum (*select_sectype)(struct TCP_Server_Info *,
+			    enum securityEnum);
+	int (*next_header)(struct TCP_Server_Info *server, char *buf,
+			   unsigned int *noff);
+	/* ioctl passthrough for query_info */
+	int (*ioctl_query_info)(const unsigned int xid,
+				struct cifs_tcon *tcon,
+				struct cifs_sb_info *cifs_sb,
+				__le16 *path, int is_dir,
+				unsigned long p);
+	/* make unix special files (block, char, fifo, socket) */
+	int (*make_node)(unsigned int xid,
+			 struct inode *inode,
+			 struct dentry *dentry,
+			 struct cifs_tcon *tcon,
+			 const char *full_path,
+			 umode_t mode,
+			 dev_t device_number);
+	/* version specific fiemap implementation */
+	int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *,
+		      struct fiemap_extent_info *, u64, u64);
+	/* version specific llseek implementation */
+	loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int);
+	/* Check for STATUS_IO_TIMEOUT */
+	bool (*is_status_io_timeout)(char *buf);
+	/* Check for STATUS_NETWORK_NAME_DELETED */
+	bool (*is_network_name_deleted)(char *buf, struct TCP_Server_Info *srv);
+	int (*parse_reparse_point)(struct cifs_sb_info *cifs_sb,
+				   struct kvec *rsp_iov,
+				   struct cifs_open_info_data *data);
+};
+
+struct smb_version_values {
+	char		*version_string;
+	__u16		protocol_id;
+	__u32		req_capabilities;
+	__u32		large_lock_type;
+	__u32		exclusive_lock_type;
+	__u32		shared_lock_type;
+	__u32		unlock_lock_type;
+	size_t		header_preamble_size;
+	size_t		header_size;
+	size_t		max_header_size;
+	size_t		read_rsp_size;
+	__le16		lock_cmd;
+	unsigned int	cap_unix;
+	unsigned int	cap_nt_find;
+	unsigned int	cap_large_files;
+	__u16		signing_enabled;
+	__u16		signing_required;
+	size_t		create_lease_size;
+};
+
+#define HEADER_SIZE(server) (server->vals->header_size)
+#define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
+#define HEADER_PREAMBLE_SIZE(server) (server->vals->header_preamble_size)
+#define MID_HEADER_SIZE(server) (HEADER_SIZE(server) - 1 - HEADER_PREAMBLE_SIZE(server))
+
+/**
+ * CIFS superblock mount flags (mnt_cifs_flags) to consider when
+ * trying to reuse existing superblock for a new mount
+ */
+#define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
+			 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
+			 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
+			 CIFS_MOUNT_MAP_SFM_CHR | \
+			 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
+			 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
+			 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
+			 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
+			 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
+			 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
+			 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID | \
+			 CIFS_MOUNT_UID_FROM_ACL | CIFS_MOUNT_NO_HANDLE_CACHE | \
+			 CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID | \
+			 CIFS_MOUNT_RO_CACHE | CIFS_MOUNT_RW_CACHE)
+
+/**
+ * Generic VFS superblock mount flags (s_flags) to consider when
+ * trying to reuse existing superblock for a new mount
+ */
+#define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \
+		      SB_NODEV | SB_SYNCHRONOUS)
+
+struct cifs_mnt_data {
+	struct cifs_sb_info *cifs_sb;
+	struct smb3_fs_context *ctx;
+	int flags;
+};
+
+static inline unsigned int
+get_rfc1002_length(void *buf)
+{
+	return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
+}
+
+static inline void
+inc_rfc1001_len(void *buf, int count)
+{
+	be32_add_cpu((__be32 *)buf, count);
+}
+
+struct TCP_Server_Info {
+	struct list_head tcp_ses_list;
+	struct list_head smb_ses_list;
+	spinlock_t srv_lock;  /* protect anything here that is not protected */
+	__u64 conn_id; /* connection identifier (useful for debugging) */
+	int srv_count; /* reference counter */
+	/* 15 character server name + 0x20 16th byte indicating type = srv */
+	char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
+	struct smb_version_operations	*ops;
+	struct smb_version_values	*vals;
+	/* updates to tcpStatus protected by cifs_tcp_ses_lock */
+	enum statusEnum tcpStatus; /* what we think the status is */
+	char *hostname; /* hostname portion of UNC string */
+	struct socket *ssocket;
+	struct sockaddr_storage dstaddr;
+	struct sockaddr_storage srcaddr; /* locally bind to this IP */
+#ifdef CONFIG_NET_NS
+	struct net *net;
+#endif
+	wait_queue_head_t response_q;
+	wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
+	spinlock_t mid_lock;  /* protect mid queue and it's entries */
+	struct list_head pending_mid_q;
+	bool noblocksnd;		/* use blocking sendmsg */
+	bool noautotune;		/* do not autotune send buf sizes */
+	bool nosharesock;
+	bool tcp_nodelay;
+	bool terminate;
+	unsigned int credits;  /* send no more requests at once */
+	unsigned int max_credits; /* can override large 32000 default at mnt */
+	unsigned int in_flight;  /* number of requests on the wire to server */
+	unsigned int max_in_flight; /* max number of requests that were on wire */
+	spinlock_t req_lock;  /* protect the two values above */
+	struct mutex _srv_mutex;
+	unsigned int nofs_flag;
+	struct task_struct *tsk;
+	char server_GUID[16];
+	__u16 sec_mode;
+	bool sign; /* is signing enabled on this connection? */
+	bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */
+	bool session_estab; /* mark when very first sess is established */
+	int echo_credits;  /* echo reserved slots */
+	int oplock_credits;  /* oplock break reserved slots */
+	bool echoes:1; /* enable echoes */
+	__u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
+	u16 dialect; /* dialect index that server chose */
+	bool oplocks:1; /* enable oplocks */
+	unsigned int maxReq;	/* Clients should submit no more */
+	/* than maxReq distinct unanswered SMBs to the server when using  */
+	/* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */
+	unsigned int maxBuf;	/* maxBuf specifies the maximum */
+	/* message size the server can send or receive for non-raw SMBs */
+	/* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
+	/* when socket is setup (and during reconnect) before NegProt sent */
+	unsigned int max_rw;	/* maxRw specifies the maximum */
+	/* message size the server can send or receive for */
+	/* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
+	unsigned int capabilities; /* selective disabling of caps by smb sess */
+	int timeAdj;  /* Adjust for difference in server time zone in sec */
+	__u64 CurrentMid;         /* multiplex id - rotating counter, protected by GlobalMid_Lock */
+	char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
+	/* 16th byte of RFC1001 workstation name is always null */
+	char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
+	__u32 sequence_number; /* for signing, protected by srv_mutex */
+	__u32 reconnect_instance; /* incremented on each reconnect */
+	struct session_key session_key;
+	unsigned long lstrp; /* when we got last response from this server */
+	struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
+#define	CIFS_NEGFLAVOR_UNENCAP	1	/* wct == 17, but no ext_sec */
+#define	CIFS_NEGFLAVOR_EXTENDED	2	/* wct == 17, ext_sec bit set */
+	char	negflavor;	/* NEGOTIATE response flavor */
+	/* extended security flavors that server supports */
+	bool	sec_ntlmssp;		/* supports NTLMSSP */
+	bool	sec_kerberosu2u;	/* supports U2U Kerberos */
+	bool	sec_kerberos;		/* supports plain Kerberos */
+	bool	sec_mskerberos;		/* supports legacy MS Kerberos */
+	bool	large_buf;		/* is current buffer large? */
+	/* use SMBD connection instead of socket */
+	bool	rdma;
+	/* point to the SMBD connection if RDMA is used instead of socket */
+	struct smbd_connection *smbd_conn;
+	struct delayed_work	echo; /* echo ping workqueue job */
+	char	*smallbuf;	/* pointer to current "small" buffer */
+	char	*bigbuf;	/* pointer to current "big" buffer */
+	/* Total size of this PDU. Only valid from cifs_demultiplex_thread */
+	unsigned int pdu_size;
+	unsigned int total_read; /* total amount of data read in this pass */
+	atomic_t in_send; /* requests trying to send */
+	atomic_t num_waiters;   /* blocked waiting to get in sendrecv */
+#ifdef CONFIG_CIFS_STATS2
+	atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */
+	atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */
+	__u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */
+	__u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS];
+	__u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS];
+#endif /* STATS2 */
+	unsigned int	max_read;
+	unsigned int	max_write;
+	unsigned int	min_offload;
+	__le16	compress_algorithm;
+	__u16	signing_algorithm;
+	__le16	cipher_type;
+	 /* save initital negprot hash */
+	__u8	preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
+	bool	signing_negotiated; /* true if valid signing context rcvd from server */
+	bool	posix_ext_supported;
+	struct delayed_work reconnect; /* reconnect workqueue job */
+	struct mutex reconnect_mutex; /* prevent simultaneous reconnects */
+	unsigned long echo_interval;
+
+	/*
+	 * Number of targets available for reconnect. The more targets
+	 * the more tasks have to wait to let the demultiplex thread
+	 * reconnect.
+	 */
+	int nr_targets;
+	bool noblockcnt; /* use non-blocking connect() */
+
+	/*
+	 * If this is a session channel,
+	 * primary_server holds the ref-counted
+	 * pointer to primary channel connection for the session.
+	 */
+#define SERVER_IS_CHAN(server)	(!!(server)->primary_server)
+	struct TCP_Server_Info *primary_server;
+	__u16 channel_sequence_num;  /* incremented on primary channel on each chan reconnect */
+
+#ifdef CONFIG_CIFS_SWN_UPCALL
+	bool use_swn_dstaddr;
+	struct sockaddr_storage swn_dstaddr;
+#endif
+	struct mutex refpath_lock; /* protects leaf_fullpath */
+	/*
+	 * leaf_fullpath: Canonical DFS referral path related to this
+	 *                connection.
+	 *                It is used in DFS cache refresher, reconnect and may
+	 *                change due to nested DFS links.
+	 *
+	 * Protected by @refpath_lock and @srv_lock.  The @refpath_lock is
+	 * mostly used for not requiring a copy of @leaf_fullpath when getting
+	 * cached or new DFS referrals (which might also sleep during I/O).
+	 * While @srv_lock is held for making string and NULL comparions against
+	 * both fields as in mount(2) and cache refresh.
+	 *
+	 * format: \\HOST\SHARE[\OPTIONAL PATH]
+	 */
+	char *leaf_fullpath;
+};
+
+static inline bool is_smb1(struct TCP_Server_Info *server)
+{
+	return HEADER_PREAMBLE_SIZE(server) != 0;
+}
+
+static inline void cifs_server_lock(struct TCP_Server_Info *server)
+{
+	unsigned int nofs_flag = memalloc_nofs_save();
+
+	mutex_lock(&server->_srv_mutex);
+	server->nofs_flag = nofs_flag;
+}
+
+static inline void cifs_server_unlock(struct TCP_Server_Info *server)
+{
+	unsigned int nofs_flag = server->nofs_flag;
+
+	mutex_unlock(&server->_srv_mutex);
+	memalloc_nofs_restore(nofs_flag);
+}
+
+struct cifs_credits {
+	unsigned int value;
+	unsigned int instance;
+};
+
+static inline unsigned int
+in_flight(struct TCP_Server_Info *server)
+{
+	unsigned int num;
+
+	spin_lock(&server->req_lock);
+	num = server->in_flight;
+	spin_unlock(&server->req_lock);
+	return num;
+}
+
+static inline bool
+has_credits(struct TCP_Server_Info *server, int *credits, int num_credits)
+{
+	int num;
+
+	spin_lock(&server->req_lock);
+	num = *credits;
+	spin_unlock(&server->req_lock);
+	return num >= num_credits;
+}
+
+static inline void
+add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits,
+	    const int optype)
+{
+	server->ops->add_credits(server, credits, optype);
+}
+
+static inline void
+add_credits_and_wake_if(struct TCP_Server_Info *server,
+			const struct cifs_credits *credits, const int optype)
+{
+	if (credits->value) {
+		server->ops->add_credits(server, credits, optype);
+		wake_up(&server->request_q);
+	}
+}
+
+static inline void
+set_credits(struct TCP_Server_Info *server, const int val)
+{
+	server->ops->set_credits(server, val);
+}
+
+static inline int
+adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits,
+	       const unsigned int payload_size)
+{
+	return server->ops->adjust_credits ?
+		server->ops->adjust_credits(server, credits, payload_size) : 0;
+}
+
+static inline __le64
+get_next_mid64(struct TCP_Server_Info *server)
+{
+	return cpu_to_le64(server->ops->get_next_mid(server));
+}
+
+static inline __le16
+get_next_mid(struct TCP_Server_Info *server)
+{
+	__u16 mid = server->ops->get_next_mid(server);
+	/*
+	 * The value in the SMB header should be little endian for easy
+	 * on-the-wire decoding.
+	 */
+	return cpu_to_le16(mid);
+}
+
+static inline void
+revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
+{
+	if (server->ops->revert_current_mid)
+		server->ops->revert_current_mid(server, val);
+}
+
+static inline void
+revert_current_mid_from_hdr(struct TCP_Server_Info *server,
+			    const struct smb2_hdr *shdr)
+{
+	unsigned int num = le16_to_cpu(shdr->CreditCharge);
+
+	return revert_current_mid(server, num > 0 ? num : 1);
+}
+
+static inline __u16
+get_mid(const struct smb_hdr *smb)
+{
+	return le16_to_cpu(smb->Mid);
+}
+
+static inline bool
+compare_mid(__u16 mid, const struct smb_hdr *smb)
+{
+	return mid == le16_to_cpu(smb->Mid);
+}
+
+/*
+ * When the server supports very large reads and writes via POSIX extensions,
+ * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
+ * including the RFC1001 length.
+ *
+ * Note that this might make for "interesting" allocation problems during
+ * writeback however as we have to allocate an array of pointers for the
+ * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096.
+ *
+ * For reads, there is a similar problem as we need to allocate an array
+ * of kvecs to handle the receive, though that should only need to be done
+ * once.
+ */
+#define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
+#define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
+
+/*
+ * When the server doesn't allow large posix writes, only allow a rsize/wsize
+ * of 2^17-1 minus the size of the call header. That allows for a read or
+ * write up to the maximum size described by RFC1002.
+ */
+#define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
+#define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
+
+#define CIFS_DEFAULT_IOSIZE (1024 * 1024)
+
+/*
+ * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
+ * those values when posix extensions aren't in force. In actuality here, we
+ * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
+ * to be ok with the extra byte even though Windows doesn't send writes that
+ * are that large.
+ *
+ * Citation:
+ *
+ * https://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
+ */
+#define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
+#define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
+
+/*
+ * Macros to allow the TCP_Server_Info->net field and related code to drop out
+ * when CONFIG_NET_NS isn't set.
+ */
+
+#ifdef CONFIG_NET_NS
+
+static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
+{
+	return srv->net;
+}
+
+static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
+{
+	srv->net = net;
+}
+
+#else
+
+static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
+{
+	return &init_net;
+}
+
+static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
+{
+}
+
+#endif
+
+struct cifs_server_iface {
+	struct list_head iface_head;
+	struct kref refcount;
+	size_t speed;
+	size_t weight_fulfilled;
+	unsigned int num_channels;
+	unsigned int rdma_capable : 1;
+	unsigned int rss_capable : 1;
+	unsigned int is_active : 1; /* unset if non existent */
+	struct sockaddr_storage sockaddr;
+};
+
+/* release iface when last ref is dropped */
+static inline void
+release_iface(struct kref *ref)
+{
+	struct cifs_server_iface *iface = container_of(ref,
+						       struct cifs_server_iface,
+						       refcount);
+	kfree(iface);
+}
+
+struct cifs_chan {
+	unsigned int in_reconnect : 1; /* if session setup in progress for this channel */
+	struct TCP_Server_Info *server;
+	struct cifs_server_iface *iface; /* interface in use */
+	__u8 signkey[SMB3_SIGN_KEY_SIZE];
+};
+
+/*
+ * Session structure.  One of these for each uid session with a particular host
+ */
+struct cifs_ses {
+	struct list_head smb_ses_list;
+	struct list_head rlist; /* reconnect list */
+	struct list_head tcon_list;
+	struct cifs_tcon *tcon_ipc;
+	spinlock_t ses_lock;  /* protect anything here that is not protected */
+	struct mutex session_mutex;
+	struct TCP_Server_Info *server;	/* pointer to server info */
+	int ses_count;		/* reference counter */
+	enum ses_status_enum ses_status;  /* updates protected by cifs_tcp_ses_lock */
+	unsigned int overrideSecFlg; /* if non-zero override global sec flags */
+	char *serverOS;		/* name of operating system underlying server */
+	char *serverNOS;	/* name of network operating system of server */
+	char *serverDomain;	/* security realm of server */
+	__u64 Suid;		/* remote smb uid  */
+	kuid_t linux_uid;	/* overriding owner of files on the mount */
+	kuid_t cred_uid;	/* owner of credentials */
+	unsigned int capabilities;
+	char ip_addr[INET6_ADDRSTRLEN + 1]; /* Max ipv6 (or v4) addr string len */
+	char *user_name;	/* must not be null except during init of sess
+				   and after mount option parsing we fill it */
+	char *domainName;
+	char *password;
+	char workstation_name[CIFS_MAX_WORKSTATION_LEN];
+	struct session_key auth_key;
+	struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
+	enum securityEnum sectype; /* what security flavor was specified? */
+	bool sign;		/* is signing required? */
+	bool domainAuto:1;
+	__u16 session_flags;
+	__u8 smb3signingkey[SMB3_SIGN_KEY_SIZE];
+	__u8 smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE];
+	__u8 smb3decryptionkey[SMB3_ENC_DEC_KEY_SIZE];
+	__u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
+
+	/*
+	 * Network interfaces available on the server this session is
+	 * connected to.
+	 *
+	 * Other channels can be opened by connecting and binding this
+	 * session to interfaces from this list.
+	 *
+	 * iface_lock should be taken when accessing any of these fields
+	 */
+	spinlock_t iface_lock;
+	/* ========= begin: protected by iface_lock ======== */
+	struct list_head iface_list;
+	size_t iface_count;
+	unsigned long iface_last_update; /* jiffies */
+	/* ========= end: protected by iface_lock ======== */
+
+	spinlock_t chan_lock;
+	/* ========= begin: protected by chan_lock ======== */
+#define CIFS_MAX_CHANNELS 16
+#define CIFS_INVAL_CHAN_INDEX (-1)
+#define CIFS_ALL_CHANNELS_SET(ses)	\
+	((1UL << (ses)->chan_count) - 1)
+#define CIFS_ALL_CHANS_GOOD(ses)		\
+	(!(ses)->chans_need_reconnect)
+#define CIFS_ALL_CHANS_NEED_RECONNECT(ses)	\
+	((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses))
+#define CIFS_SET_ALL_CHANS_NEED_RECONNECT(ses)	\
+	((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses))
+#define CIFS_CHAN_NEEDS_RECONNECT(ses, index)	\
+	test_bit((index), &(ses)->chans_need_reconnect)
+#define CIFS_CHAN_IN_RECONNECT(ses, index)	\
+	((ses)->chans[(index)].in_reconnect)
+
+	struct cifs_chan chans[CIFS_MAX_CHANNELS];
+	size_t chan_count;
+	size_t chan_max;
+	atomic_t chan_seq; /* round robin state */
+
+	/*
+	 * chans_need_reconnect is a bitmap indicating which of the channels
+	 * under this smb session needs to be reconnected.
+	 * If not multichannel session, only one bit will be used.
+	 *
+	 * We will ask for sess and tcon reconnection only if all the
+	 * channels are marked for needing reconnection. This will
+	 * enable the sessions on top to continue to live till any
+	 * of the channels below are active.
+	 */
+	unsigned long chans_need_reconnect;
+	/* ========= end: protected by chan_lock ======== */
+	struct cifs_ses *dfs_root_ses;
+	struct nls_table *local_nls;
+};
+
+static inline bool
+cap_unix(struct cifs_ses *ses)
+{
+	return ses->server->vals->cap_unix & ses->capabilities;
+}
+
+/*
+ * common struct for holding inode info when searching for or updating an
+ * inode with new info
+ */
+
+#define CIFS_FATTR_JUNCTION		0x1
+#define CIFS_FATTR_DELETE_PENDING	0x2
+#define CIFS_FATTR_NEED_REVAL		0x4
+#define CIFS_FATTR_INO_COLLISION	0x8
+#define CIFS_FATTR_UNKNOWN_NLINK	0x10
+#define CIFS_FATTR_FAKE_ROOT_INO	0x20
+
+struct cifs_fattr {
+	u32		cf_flags;
+	u32		cf_cifsattrs;
+	u64		cf_uniqueid;
+	u64		cf_eof;
+	u64		cf_bytes;
+	u64		cf_createtime;
+	kuid_t		cf_uid;
+	kgid_t		cf_gid;
+	umode_t		cf_mode;
+	dev_t		cf_rdev;
+	unsigned int	cf_nlink;
+	unsigned int	cf_dtype;
+	struct timespec64 cf_atime;
+	struct timespec64 cf_mtime;
+	struct timespec64 cf_ctime;
+	u32             cf_cifstag;
+	char            *cf_symlink_target;
+};
+
+/*
+ * there is one of these for each connection to a resource on a particular
+ * session
+ */
+struct cifs_tcon {
+	struct list_head tcon_list;
+	int tc_count;
+	struct list_head rlist; /* reconnect list */
+	spinlock_t tc_lock;  /* protect anything here that is not protected */
+	atomic_t num_local_opens;  /* num of all opens including disconnected */
+	atomic_t num_remote_opens; /* num of all network opens on server */
+	struct list_head openFileList;
+	spinlock_t open_file_lock; /* protects list above */
+	struct cifs_ses *ses;	/* pointer to session associated with */
+	char tree_name[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
+	char *nativeFileSystem;
+	char *password;		/* for share-level security */
+	__u32 tid;		/* The 4 byte tree id */
+	__u16 Flags;		/* optional support bits */
+	enum tid_status_enum status;
+	atomic_t num_smbs_sent;
+	union {
+		struct {
+			atomic_t num_writes;
+			atomic_t num_reads;
+			atomic_t num_flushes;
+			atomic_t num_oplock_brks;
+			atomic_t num_opens;
+			atomic_t num_closes;
+			atomic_t num_deletes;
+			atomic_t num_mkdirs;
+			atomic_t num_posixopens;
+			atomic_t num_posixmkdirs;
+			atomic_t num_rmdirs;
+			atomic_t num_renames;
+			atomic_t num_t2renames;
+			atomic_t num_ffirst;
+			atomic_t num_fnext;
+			atomic_t num_fclose;
+			atomic_t num_hardlinks;
+			atomic_t num_symlinks;
+			atomic_t num_locks;
+			atomic_t num_acl_get;
+			atomic_t num_acl_set;
+		} cifs_stats;
+		struct {
+			atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
+			atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
+		} smb2_stats;
+	} stats;
+	__u64    bytes_read;
+	__u64    bytes_written;
+	spinlock_t stat_lock;  /* protects the two fields above */
+	FILE_SYSTEM_DEVICE_INFO fsDevInfo;
+	FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
+	FILE_SYSTEM_UNIX_INFO fsUnixInfo;
+	bool ipc:1;   /* set if connection to IPC$ share (always also pipe) */
+	bool pipe:1;  /* set if connection to pipe share */
+	bool print:1; /* set if connection to printer share */
+	bool retry:1;
+	bool nocase:1;
+	bool nohandlecache:1; /* if strange server resource prob can turn off */
+	bool nodelete:1;
+	bool seal:1;      /* transport encryption for this mounted share */
+	bool unix_ext:1;  /* if false disable Linux extensions to CIFS protocol
+				for this mount even if server would support */
+	bool posix_extensions; /* if true SMB3.11 posix extensions enabled */
+	bool local_lease:1; /* check leases (only) on local system not remote */
+	bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
+	bool broken_sparse_sup; /* if server or share does not support sparse */
+	bool need_reconnect:1; /* connection reset, tid now invalid */
+	bool need_reopen_files:1; /* need to reopen tcon file handles */
+	bool use_resilient:1; /* use resilient instead of durable handles */
+	bool use_persistent:1; /* use persistent instead of durable handles */
+	bool no_lease:1;    /* Do not request leases on files or directories */
+	bool use_witness:1; /* use witness protocol */
+	__le32 capabilities;
+	__u32 share_flags;
+	__u32 maximal_access;
+	__u32 vol_serial_number;
+	__le64 vol_create_time;
+	__u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */
+	__u32 handle_timeout; /* persistent and durable handle timeout in ms */
+	__u32 ss_flags;		/* sector size flags */
+	__u32 perf_sector_size; /* best sector size for perf */
+	__u32 max_chunks;
+	__u32 max_bytes_chunk;
+	__u32 max_bytes_copy;
+	__u32 max_cached_dirs;
+#ifdef CONFIG_CIFS_FSCACHE
+	u64 resource_id;		/* server resource id */
+	struct fscache_volume *fscache;	/* cookie for share */
+#endif
+	struct list_head pending_opens;	/* list of incomplete opens */
+	struct cached_fids *cfids;
+	/* BB add field for back pointer to sb struct(s)? */
+#ifdef CONFIG_CIFS_DFS_UPCALL
+	struct list_head dfs_ses_list;
+	struct delayed_work dfs_cache_work;
+#endif
+	struct delayed_work	query_interfaces; /* query interfaces workqueue job */
+	char *origin_fullpath; /* canonical copy of smb3_fs_context::source */
+};
+
+/*
+ * This is a refcounted and timestamped container for a tcon pointer. The
+ * container holds a tcon reference. It is considered safe to free one of
+ * these when the tl_count goes to 0. The tl_time is the time of the last
+ * "get" on the container.
+ */
+struct tcon_link {
+	struct rb_node		tl_rbnode;
+	kuid_t			tl_uid;
+	unsigned long		tl_flags;
+#define TCON_LINK_MASTER	0
+#define TCON_LINK_PENDING	1
+#define TCON_LINK_IN_TREE	2
+	unsigned long		tl_time;
+	atomic_t		tl_count;
+	struct cifs_tcon	*tl_tcon;
+};
+
+extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
+extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst);
+
+static inline struct cifs_tcon *
+tlink_tcon(struct tcon_link *tlink)
+{
+	return tlink->tl_tcon;
+}
+
+static inline struct tcon_link *
+cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
+{
+	return cifs_sb->master_tlink;
+}
+
+extern void cifs_put_tlink(struct tcon_link *tlink);
+
+static inline struct tcon_link *
+cifs_get_tlink(struct tcon_link *tlink)
+{
+	if (tlink && !IS_ERR(tlink))
+		atomic_inc(&tlink->tl_count);
+	return tlink;
+}
+
+/* This function is always expected to succeed */
+extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
+
+#define CIFS_OPLOCK_NO_CHANGE 0xfe
+
+struct cifs_pending_open {
+	struct list_head olist;
+	struct tcon_link *tlink;
+	__u8 lease_key[16];
+	__u32 oplock;
+};
+
+struct cifs_deferred_close {
+	struct list_head dlist;
+	struct tcon_link *tlink;
+	__u16  netfid;
+	__u64  persistent_fid;
+	__u64  volatile_fid;
+};
+
+/*
+ * This info hangs off the cifsFileInfo structure, pointed to by llist.
+ * This is used to track byte stream locks on the file
+ */
+struct cifsLockInfo {
+	struct list_head llist;	/* pointer to next cifsLockInfo */
+	struct list_head blist; /* pointer to locks blocked on this */
+	wait_queue_head_t block_q;
+	__u64 offset;
+	__u64 length;
+	__u32 pid;
+	__u16 type;
+	__u16 flags;
+};
+
+/*
+ * One of these for each open instance of a file
+ */
+struct cifs_search_info {
+	loff_t index_of_last_entry;
+	__u16 entries_in_buffer;
+	__u16 info_level;
+	__u32 resume_key;
+	char *ntwrk_buf_start;
+	char *srch_entries_start;
+	char *last_entry;
+	const char *presume_name;
+	unsigned int resume_name_len;
+	bool endOfSearch:1;
+	bool emptyDir:1;
+	bool unicode:1;
+	bool smallBuf:1; /* so we know which buf_release function to call */
+};
+
+#define ACL_NO_MODE	((umode_t)(-1))
+struct cifs_open_parms {
+	struct cifs_tcon *tcon;
+	struct cifs_sb_info *cifs_sb;
+	int disposition;
+	int desired_access;
+	int create_options;
+	const char *path;
+	struct cifs_fid *fid;
+	umode_t mode;
+	bool reconnect:1;
+};
+
+struct cifs_fid {
+	__u16 netfid;
+	__u64 persistent_fid;	/* persist file id for smb2 */
+	__u64 volatile_fid;	/* volatile file id for smb2 */
+	__u8 lease_key[SMB2_LEASE_KEY_SIZE];	/* lease key for smb2 */
+	__u8 create_guid[16];
+	__u32 access;
+	struct cifs_pending_open *pending_open;
+	unsigned int epoch;
+#ifdef CONFIG_CIFS_DEBUG2
+	__u64 mid;
+#endif /* CIFS_DEBUG2 */
+	bool purge_cache;
+};
+
+struct cifs_fid_locks {
+	struct list_head llist;
+	struct cifsFileInfo *cfile;	/* fid that owns locks */
+	struct list_head locks;		/* locks held by fid above */
+};
+
+struct cifsFileInfo {
+	/* following two lists are protected by tcon->open_file_lock */
+	struct list_head tlist;	/* pointer to next fid owned by tcon */
+	struct list_head flist;	/* next fid (file instance) for this inode */
+	/* lock list below protected by cifsi->lock_sem */
+	struct cifs_fid_locks *llist;	/* brlocks held by this fid */
+	kuid_t uid;		/* allows finding which FileInfo structure */
+	__u32 pid;		/* process id who opened file */
+	struct cifs_fid fid;	/* file id from remote */
+	struct list_head rlist; /* reconnect list */
+	/* BB add lock scope info here if needed */
+	/* lock scope id (0 if none) */
+	struct dentry *dentry;
+	struct tcon_link *tlink;
+	unsigned int f_flags;
+	bool invalidHandle:1;	/* file closed via session abend */
+	bool swapfile:1;
+	bool oplock_break_cancelled:1;
+	unsigned int oplock_epoch; /* epoch from the lease break */
+	__u32 oplock_level; /* oplock/lease level from the lease break */
+	int count;
+	spinlock_t file_info_lock; /* protects four flag/count fields above */
+	struct mutex fh_mutex; /* prevents reopen race after dead ses*/
+	struct cifs_search_info srch_inf;
+	struct work_struct oplock_break; /* work for oplock breaks */
+	struct work_struct put; /* work for the final part of _put */
+	struct delayed_work deferred;
+	bool deferred_close_scheduled; /* Flag to indicate close is scheduled */
+	char *symlink_target;
+};
+
+struct cifs_io_parms {
+	__u16 netfid;
+	__u64 persistent_fid;	/* persist file id for smb2 */
+	__u64 volatile_fid;	/* volatile file id for smb2 */
+	__u32 pid;
+	__u64 offset;
+	unsigned int length;
+	struct cifs_tcon *tcon;
+	struct TCP_Server_Info *server;
+};
+
+struct cifs_aio_ctx {
+	struct kref		refcount;
+	struct list_head	list;
+	struct mutex		aio_mutex;
+	struct completion	done;
+	struct iov_iter		iter;
+	struct kiocb		*iocb;
+	struct cifsFileInfo	*cfile;
+	struct bio_vec		*bv;
+	loff_t			pos;
+	unsigned int		nr_pinned_pages;
+	ssize_t			rc;
+	unsigned int		len;
+	unsigned int		total_len;
+	unsigned int		bv_need_unpin;	/* If ->bv[] needs unpinning */
+	bool			should_dirty;
+	/*
+	 * Indicates if this aio_ctx is for direct_io,
+	 * If yes, iter is a copy of the user passed iov_iter
+	 */
+	bool			direct_io;
+};
+
+/* asynchronous read support */
+struct cifs_readdata {
+	struct kref			refcount;
+	struct list_head		list;
+	struct completion		done;
+	struct cifsFileInfo		*cfile;
+	struct address_space		*mapping;
+	struct cifs_aio_ctx		*ctx;
+	__u64				offset;
+	ssize_t				got_bytes;
+	unsigned int			bytes;
+	pid_t				pid;
+	int				result;
+	struct work_struct		work;
+	struct iov_iter			iter;
+	struct kvec			iov[2];
+	struct TCP_Server_Info		*server;
+#ifdef CONFIG_CIFS_SMB_DIRECT
+	struct smbd_mr			*mr;
+#endif
+	struct cifs_credits		credits;
+};
+
+/* asynchronous write support */
+struct cifs_writedata {
+	struct kref			refcount;
+	struct list_head		list;
+	struct completion		done;
+	enum writeback_sync_modes	sync_mode;
+	struct work_struct		work;
+	struct cifsFileInfo		*cfile;
+	struct cifs_aio_ctx		*ctx;
+	struct iov_iter			iter;
+	struct bio_vec			*bv;
+	__u64				offset;
+	pid_t				pid;
+	unsigned int			bytes;
+	int				result;
+	struct TCP_Server_Info		*server;
+#ifdef CONFIG_CIFS_SMB_DIRECT
+	struct smbd_mr			*mr;
+#endif
+	struct cifs_credits		credits;
+};
+
+/*
+ * Take a reference on the file private data. Must be called with
+ * cfile->file_info_lock held.
+ */
+static inline void
+cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
+{
+	++cifs_file->count;
+}
+
+struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
+void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr,
+		       bool offload);
+void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
+
+#define CIFS_CACHE_READ_FLG	1
+#define CIFS_CACHE_HANDLE_FLG	2
+#define CIFS_CACHE_RH_FLG	(CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
+#define CIFS_CACHE_WRITE_FLG	4
+#define CIFS_CACHE_RW_FLG	(CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
+#define CIFS_CACHE_RHW_FLG	(CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
+
+#define CIFS_CACHE_READ(cinode) ((cinode->oplock & CIFS_CACHE_READ_FLG) || (CIFS_SB(cinode->netfs.inode.i_sb)->mnt_cifs_flags & CIFS_MOUNT_RO_CACHE))
+#define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
+#define CIFS_CACHE_WRITE(cinode) ((cinode->oplock & CIFS_CACHE_WRITE_FLG) || (CIFS_SB(cinode->netfs.inode.i_sb)->mnt_cifs_flags & CIFS_MOUNT_RW_CACHE))
+
+/*
+ * One of these for each file inode
+ */
+
+struct cifsInodeInfo {
+	struct netfs_inode netfs; /* Netfslib context and vfs inode */
+	bool can_cache_brlcks;
+	struct list_head llist;	/* locks helb by this inode */
+	/*
+	 * NOTE: Some code paths call down_read(lock_sem) twice, so
+	 * we must always use cifs_down_write() instead of down_write()
+	 * for this semaphore to avoid deadlocks.
+	 */
+	struct rw_semaphore lock_sem;	/* protect the fields above */
+	/* BB add in lists for dirty pages i.e. write caching info for oplock */
+	struct list_head openFileList;
+	spinlock_t	open_file_lock;	/* protects openFileList */
+	__u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
+	unsigned int oplock;		/* oplock/lease level we have */
+	unsigned int epoch;		/* used to track lease state changes */
+#define CIFS_INODE_PENDING_OPLOCK_BREAK   (0) /* oplock break in progress */
+#define CIFS_INODE_PENDING_WRITERS	  (1) /* Writes in progress */
+#define CIFS_INODE_FLAG_UNUSED		  (2) /* Unused flag */
+#define CIFS_INO_DELETE_PENDING		  (3) /* delete pending on server */
+#define CIFS_INO_INVALID_MAPPING	  (4) /* pagecache is invalid */
+#define CIFS_INO_LOCK			  (5) /* lock bit for synchronization */
+#define CIFS_INO_MODIFIED_ATTR            (6) /* Indicate change in mtime/ctime */
+#define CIFS_INO_CLOSE_ON_LOCK            (7) /* Not to defer the close when lock is set */
+	unsigned long flags;
+	spinlock_t writers_lock;
+	unsigned int writers;		/* Number of writers on this inode */
+	unsigned long time;		/* jiffies of last update of inode */
+	u64  server_eof;		/* current file size on server -- protected by i_lock */
+	u64  uniqueid;			/* server inode number */
+	u64  createtime;		/* creation time on server */
+	__u8 lease_key[SMB2_LEASE_KEY_SIZE];	/* lease key for this inode */
+	struct list_head deferred_closes; /* list of deferred closes */
+	spinlock_t deferred_lock; /* protection on deferred list */
+	bool lease_granted; /* Flag to indicate whether lease or oplock is granted. */
+	char *symlink_target;
+};
+
+static inline struct cifsInodeInfo *
+CIFS_I(struct inode *inode)
+{
+	return container_of(inode, struct cifsInodeInfo, netfs.inode);
+}
+
+static inline struct cifs_sb_info *
+CIFS_SB(struct super_block *sb)
+{
+	return sb->s_fs_info;
+}
+
+static inline struct cifs_sb_info *
+CIFS_FILE_SB(struct file *file)
+{
+	return CIFS_SB(file_inode(file)->i_sb);
+}
+
+static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
+{
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
+		return '/';
+	else
+		return '\\';
+}
+
+static inline void
+convert_delimiter(char *path, char delim)
+{
+	char old_delim, *pos;
+
+	if (delim == '/')
+		old_delim = '\\';
+	else
+		old_delim = '/';
+
+	pos = path;
+	while ((pos = strchr(pos, old_delim)))
+		*pos = delim;
+}
+
+#define cifs_stats_inc atomic_inc
+
+static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
+					    unsigned int bytes)
+{
+	if (bytes) {
+		spin_lock(&tcon->stat_lock);
+		tcon->bytes_written += bytes;
+		spin_unlock(&tcon->stat_lock);
+	}
+}
+
+static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
+					 unsigned int bytes)
+{
+	spin_lock(&tcon->stat_lock);
+	tcon->bytes_read += bytes;
+	spin_unlock(&tcon->stat_lock);
+}
+
+
+/*
+ * This is the prototype for the mid receive function. This function is for
+ * receiving the rest of the SMB frame, starting with the WordCount (which is
+ * just after the MID in struct smb_hdr). Note:
+ *
+ * - This will be called by cifsd, with no locks held.
+ * - The mid will still be on the pending_mid_q.
+ * - mid->resp_buf will point to the current buffer.
+ *
+ * Returns zero on a successful receive, or an error. The receive state in
+ * the TCP_Server_Info will also be updated.
+ */
+typedef int (mid_receive_t)(struct TCP_Server_Info *server,
+			    struct mid_q_entry *mid);
+
+/*
+ * This is the prototype for the mid callback function. This is called once the
+ * mid has been received off of the socket. When creating one, take special
+ * care to avoid deadlocks. Things to bear in mind:
+ *
+ * - it will be called by cifsd, with no locks held
+ * - the mid will be removed from any lists
+ */
+typedef void (mid_callback_t)(struct mid_q_entry *mid);
+
+/*
+ * This is the protopyte for mid handle function. This is called once the mid
+ * has been recognized after decryption of the message.
+ */
+typedef int (mid_handle_t)(struct TCP_Server_Info *server,
+			    struct mid_q_entry *mid);
+
+/* one of these for every pending CIFS request to the server */
+struct mid_q_entry {
+	struct list_head qhead;	/* mids waiting on reply from this server */
+	struct kref refcount;
+	struct TCP_Server_Info *server;	/* server corresponding to this mid */
+	__u64 mid;		/* multiplex id */
+	__u16 credits;		/* number of credits consumed by this mid */
+	__u16 credits_received;	/* number of credits from the response */
+	__u32 pid;		/* process id */
+	__u32 sequence_number;  /* for CIFS signing */
+	unsigned long when_alloc;  /* when mid was created */
+#ifdef CONFIG_CIFS_STATS2
+	unsigned long when_sent; /* time when smb send finished */
+	unsigned long when_received; /* when demux complete (taken off wire) */
+#endif
+	mid_receive_t *receive; /* call receive callback */
+	mid_callback_t *callback; /* call completion callback */
+	mid_handle_t *handle; /* call handle mid callback */
+	void *callback_data;	  /* general purpose pointer for callback */
+	struct task_struct *creator;
+	void *resp_buf;		/* pointer to received SMB header */
+	unsigned int resp_buf_size;
+	int mid_state;	/* wish this were enum but can not pass to wait_event */
+	unsigned int mid_flags;
+	__le16 command;		/* smb command code */
+	unsigned int optype;	/* operation type */
+	bool large_buf:1;	/* if valid response, is pointer to large buf */
+	bool multiRsp:1;	/* multiple trans2 responses for one request  */
+	bool multiEnd:1;	/* both received */
+	bool decrypted:1;	/* decrypted entry */
+};
+
+struct close_cancelled_open {
+	struct cifs_fid         fid;
+	struct cifs_tcon        *tcon;
+	struct work_struct      work;
+	__u64 mid;
+	__u16 cmd;
+};
+
+/*	Make code in transport.c a little cleaner by moving
+	update of optional stats into function below */
+static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
+{
+	atomic_inc(&server->in_send);
+}
+
+static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
+{
+	atomic_dec(&server->in_send);
+}
+
+static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
+{
+	atomic_inc(&server->num_waiters);
+}
+
+static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
+{
+	atomic_dec(&server->num_waiters);
+}
+
+#ifdef CONFIG_CIFS_STATS2
+static inline void cifs_save_when_sent(struct mid_q_entry *mid)
+{
+	mid->when_sent = jiffies;
+}
+#else
+static inline void cifs_save_when_sent(struct mid_q_entry *mid)
+{
+}
+#endif
+
+/* for pending dnotify requests */
+struct dir_notify_req {
+	struct list_head lhead;
+	__le16 Pid;
+	__le16 PidHigh;
+	__u16 Mid;
+	__u16 Tid;
+	__u16 Uid;
+	__u16 netfid;
+	__u32 filter; /* CompletionFilter (for multishot) */
+	int multishot;
+	struct file *pfile;
+};
+
+struct dfs_info3_param {
+	int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
+	int path_consumed;
+	int server_type;
+	int ref_flag;
+	char *path_name;
+	char *node_name;
+	int ttl;
+};
+
+struct file_list {
+	struct list_head list;
+	struct cifsFileInfo *cfile;
+};
+
+struct cifs_mount_ctx {
+	struct cifs_sb_info *cifs_sb;
+	struct smb3_fs_context *fs_ctx;
+	unsigned int xid;
+	struct TCP_Server_Info *server;
+	struct cifs_ses *ses;
+	struct cifs_tcon *tcon;
+	struct list_head dfs_ses_list;
+};
+
+static inline void __free_dfs_info_param(struct dfs_info3_param *param)
+{
+	kfree(param->path_name);
+	kfree(param->node_name);
+}
+
+static inline void free_dfs_info_param(struct dfs_info3_param *param)
+{
+	if (param)
+		__free_dfs_info_param(param);
+}
+
+static inline void zfree_dfs_info_param(struct dfs_info3_param *param)
+{
+	if (param) {
+		__free_dfs_info_param(param);
+		memset(param, 0, sizeof(*param));
+	}
+}
+
+static inline void free_dfs_info_array(struct dfs_info3_param *param,
+				       int number_of_items)
+{
+	int i;
+
+	if ((number_of_items == 0) || (param == NULL))
+		return;
+	for (i = 0; i < number_of_items; i++) {
+		kfree(param[i].path_name);
+		kfree(param[i].node_name);
+	}
+	kfree(param);
+}
+
+static inline bool is_interrupt_error(int error)
+{
+	switch (error) {
+	case -EINTR:
+	case -ERESTARTSYS:
+	case -ERESTARTNOHAND:
+	case -ERESTARTNOINTR:
+		return true;
+	}
+	return false;
+}
+
+static inline bool is_retryable_error(int error)
+{
+	if (is_interrupt_error(error) || error == -EAGAIN)
+		return true;
+	return false;
+}
+
+
+/* cifs_get_writable_file() flags */
+#define FIND_WR_ANY         0
+#define FIND_WR_FSUID_ONLY  1
+#define FIND_WR_WITH_DELETE 2
+
+#define   MID_FREE 0
+#define   MID_REQUEST_ALLOCATED 1
+#define   MID_REQUEST_SUBMITTED 2
+#define   MID_RESPONSE_RECEIVED 4
+#define   MID_RETRY_NEEDED      8 /* session closed while this request out */
+#define   MID_RESPONSE_MALFORMED 0x10
+#define   MID_SHUTDOWN		 0x20
+#define   MID_RESPONSE_READY 0x40 /* ready for other process handle the rsp */
+
+/* Flags */
+#define   MID_WAIT_CANCELLED	 1 /* Cancelled while waiting for response */
+#define   MID_DELETED            2 /* Mid has been dequeued/deleted */
+
+/* Types of response buffer returned from SendReceive2 */
+#define   CIFS_NO_BUFFER        0    /* Response buffer not returned */
+#define   CIFS_SMALL_BUFFER     1
+#define   CIFS_LARGE_BUFFER     2
+#define   CIFS_IOVEC            4    /* array of response buffers */
+
+/* Type of Request to SendReceive2 */
+#define   CIFS_BLOCKING_OP      1    /* operation can block */
+#define   CIFS_NON_BLOCKING     2    /* do not block waiting for credits */
+#define   CIFS_TIMEOUT_MASK 0x003    /* only one of above set in req */
+#define   CIFS_LOG_ERROR    0x010    /* log NT STATUS if non-zero */
+#define   CIFS_LARGE_BUF_OP 0x020    /* large request buffer */
+#define   CIFS_NO_RSP_BUF   0x040    /* no response buffer required */
+
+/* Type of request operation */
+#define   CIFS_ECHO_OP            0x080  /* echo request */
+#define   CIFS_OBREAK_OP          0x0100 /* oplock break request */
+#define   CIFS_NEG_OP             0x0200 /* negotiate request */
+#define   CIFS_CP_CREATE_CLOSE_OP 0x0400 /* compound create+close request */
+/* Lower bitmask values are reserved by others below. */
+#define   CIFS_SESS_OP            0x2000 /* session setup request */
+#define   CIFS_OP_MASK            0x2780 /* mask request type */
+
+#define   CIFS_HAS_CREDITS        0x0400 /* already has credits */
+#define   CIFS_TRANSFORM_REQ      0x0800 /* transform request before sending */
+#define   CIFS_NO_SRV_RSP         0x1000 /* there is no server response */
+
+/* Security Flags: indicate type of session setup needed */
+#define   CIFSSEC_MAY_SIGN	0x00001
+#define   CIFSSEC_MAY_NTLMV2	0x00004
+#define   CIFSSEC_MAY_KRB5	0x00008
+#define   CIFSSEC_MAY_SEAL	0x00040 /* not supported yet */
+#define   CIFSSEC_MAY_NTLMSSP	0x00080 /* raw ntlmssp with ntlmv2 */
+
+#define   CIFSSEC_MUST_SIGN	0x01001
+/* note that only one of the following can be set so the
+result of setting MUST flags more than once will be to
+require use of the stronger protocol */
+#define   CIFSSEC_MUST_NTLMV2	0x04004
+#define   CIFSSEC_MUST_KRB5	0x08008
+#ifdef CONFIG_CIFS_UPCALL
+#define   CIFSSEC_MASK          0x8F08F /* flags supported if no weak allowed */
+#else
+#define	  CIFSSEC_MASK          0x87087 /* flags supported if no weak allowed */
+#endif /* UPCALL */
+#define   CIFSSEC_MUST_SEAL	0x40040 /* not supported yet */
+#define   CIFSSEC_MUST_NTLMSSP	0x80080 /* raw ntlmssp with ntlmv2 */
+
+#define   CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
+#define   CIFSSEC_MAX (CIFSSEC_MUST_NTLMV2)
+#define   CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
+/*
+ *****************************************************************
+ * All constants go here
+ *****************************************************************
+ */
+
+#define UID_HASH (16)
+
+/*
+ * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
+ * following to be declared.
+ */
+
+/****************************************************************************
+ * Here are all the locks (spinlock, mutex, semaphore) in cifs.ko, arranged according
+ * to the locking order. i.e. if two locks are to be held together, the lock that
+ * appears higher in this list needs to be taken before the other.
+ *
+ * If you hold a lock that is lower in this list, and you need to take a higher lock
+ * (or if you think that one of the functions that you're calling may need to), first
+ * drop the lock you hold, pick up the higher lock, then the lower one. This will
+ * ensure that locks are picked up only in one direction in the below table
+ * (top to bottom).
+ *
+ * Also, if you expect a function to be called with a lock held, explicitly document
+ * this in the comments on top of your function definition.
+ *
+ * And also, try to keep the critical sections (lock hold time) to be as minimal as
+ * possible. Blocking / calling other functions with a lock held always increase
+ * the risk of a possible deadlock.
+ *
+ * Following this rule will avoid unnecessary deadlocks, which can get really hard to
+ * debug. Also, any new lock that you introduce, please add to this list in the correct
+ * order.
+ *
+ * Please populate this list whenever you introduce new locks in your changes. Or in
+ * case I've missed some existing locks. Please ensure that it's added in the list
+ * based on the locking order expected.
+ *
+ * =====================================================================================
+ * Lock				Protects			Initialization fn
+ * =====================================================================================
+ * vol_list_lock
+ * vol_info->ctx_lock		vol_info->ctx
+ * cifs_sb_info->tlink_tree_lock	cifs_sb_info->tlink_tree	cifs_setup_cifs_sb
+ * TCP_Server_Info->		TCP_Server_Info			cifs_get_tcp_session
+ * reconnect_mutex
+ * TCP_Server_Info->srv_mutex	TCP_Server_Info			cifs_get_tcp_session
+ * cifs_ses->session_mutex		cifs_ses		sesInfoAlloc
+ *				cifs_tcon
+ * cifs_tcon->open_file_lock	cifs_tcon->openFileList		tconInfoAlloc
+ *				cifs_tcon->pending_opens
+ * cifs_tcon->stat_lock		cifs_tcon->bytes_read		tconInfoAlloc
+ *				cifs_tcon->bytes_written
+ * cifs_tcp_ses_lock		cifs_tcp_ses_list		sesInfoAlloc
+ * GlobalMid_Lock		GlobalMaxActiveXid		init_cifs
+ *				GlobalCurrentXid
+ *				GlobalTotalActiveXid
+ * TCP_Server_Info->srv_lock	(anything in struct not protected by another lock and can change)
+ * TCP_Server_Info->mid_lock	TCP_Server_Info->pending_mid_q	cifs_get_tcp_session
+ *				->CurrentMid
+ *				(any changes in mid_q_entry fields)
+ * TCP_Server_Info->req_lock	TCP_Server_Info->in_flight	cifs_get_tcp_session
+ *				->credits
+ *				->echo_credits
+ *				->oplock_credits
+ *				->reconnect_instance
+ * cifs_ses->ses_lock		(anything that is not protected by another lock and can change)
+ * cifs_ses->iface_lock		cifs_ses->iface_list		sesInfoAlloc
+ *				->iface_count
+ *				->iface_last_update
+ * cifs_ses->chan_lock		cifs_ses->chans
+ *				->chans_need_reconnect
+ *				->chans_in_reconnect
+ * cifs_tcon->tc_lock		(anything that is not protected by another lock and can change)
+ * cifsInodeInfo->open_file_lock	cifsInodeInfo->openFileList	cifs_alloc_inode
+ * cifsInodeInfo->writers_lock	cifsInodeInfo->writers		cifsInodeInfo_alloc
+ * cifsInodeInfo->lock_sem	cifsInodeInfo->llist		cifs_init_once
+ *				->can_cache_brlcks
+ * cifsInodeInfo->deferred_lock	cifsInodeInfo->deferred_closes	cifsInodeInfo_alloc
+ * cached_fid->fid_mutex		cifs_tcon->crfid		tcon_info_alloc
+ * cifsFileInfo->fh_mutex		cifsFileInfo			cifs_new_fileinfo
+ * cifsFileInfo->file_info_lock	cifsFileInfo->count		cifs_new_fileinfo
+ *				->invalidHandle			initiate_cifs_search
+ *				->oplock_break_cancelled
+ * cifs_aio_ctx->aio_mutex		cifs_aio_ctx			cifs_aio_ctx_alloc
+ ****************************************************************************/
+
+#ifdef DECLARE_GLOBALS_HERE
+#define GLOBAL_EXTERN
+#else
+#define GLOBAL_EXTERN extern
+#endif
+
+/*
+ * the list of TCP_Server_Info structures, ie each of the sockets
+ * connecting our client to a distinct server (ip address), is
+ * chained together by cifs_tcp_ses_list. The list of all our SMB
+ * sessions (and from that the tree connections) can be found
+ * by iterating over cifs_tcp_ses_list
+ */
+extern struct list_head		cifs_tcp_ses_list;
+
+/*
+ * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
+ * tcp session, and the list of tcon's per smb session. It also protects
+ * the reference counters for the server, smb session, and tcon.
+ * generally the locks should be taken in order tcp_ses_lock before
+ * tcon->open_file_lock and that before file->file_info_lock since the
+ * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
+ */
+extern spinlock_t		cifs_tcp_ses_lock;
+
+/*
+ * Global transaction id (XID) information
+ */
+extern unsigned int GlobalCurrentXid;	/* protected by GlobalMid_Sem */
+extern unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
+extern unsigned int GlobalMaxActiveXid;	/* prot by GlobalMid_Sem */
+extern spinlock_t GlobalMid_Lock; /* protects above & list operations on midQ entries */
+
+/*
+ *  Global counters, updated atomically
+ */
+extern atomic_t sesInfoAllocCount;
+extern atomic_t tconInfoAllocCount;
+extern atomic_t tcpSesNextId;
+extern atomic_t tcpSesAllocCount;
+extern atomic_t tcpSesReconnectCount;
+extern atomic_t tconInfoReconnectCount;
+
+/* Various Debug counters */
+extern atomic_t buf_alloc_count;	/* current number allocated  */
+extern atomic_t small_buf_alloc_count;
+#ifdef CONFIG_CIFS_STATS2
+extern atomic_t total_buf_alloc_count; /* total allocated over all time */
+extern atomic_t total_small_buf_alloc_count;
+extern unsigned int slow_rsp_threshold; /* number of secs before logging */
+#endif
+
+/* Misc globals */
+extern bool enable_oplocks; /* enable or disable oplocks */
+extern bool lookupCacheEnabled;
+extern unsigned int global_secflags;	/* if on, session setup sent
+				with more secure ntlmssp2 challenge/resp */
+extern unsigned int sign_CIFS_PDUs;  /* enable smb packet signing */
+extern bool enable_gcm_256; /* allow optional negotiate of strongest signing (aes-gcm-256) */
+extern bool require_gcm_256; /* require use of strongest signing (aes-gcm-256) */
+extern bool enable_negotiate_signing; /* request use of faster (GMAC) signing if available */
+extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
+extern unsigned int CIFSMaxBufSize;  /* max size not including hdr */
+extern unsigned int cifs_min_rcv;    /* min size of big ntwrk buf pool */
+extern unsigned int cifs_min_small;  /* min size of small buf pool */
+extern unsigned int cifs_max_pending; /* MAX requests at once to server*/
+extern unsigned int dir_cache_timeout; /* max time for directory lease caching of dir */
+extern bool disable_legacy_dialects;  /* forbid vers=1.0 and vers=2.0 mounts */
+extern atomic_t mid_count;
+
+void cifs_oplock_break(struct work_struct *work);
+void cifs_queue_oplock_break(struct cifsFileInfo *cfile);
+void smb2_deferred_work_close(struct work_struct *work);
+
+extern const struct slow_work_ops cifs_oplock_break_ops;
+extern struct workqueue_struct *cifsiod_wq;
+extern struct workqueue_struct *decrypt_wq;
+extern struct workqueue_struct *fileinfo_put_wq;
+extern struct workqueue_struct *cifsoplockd_wq;
+extern struct workqueue_struct *deferredclose_wq;
+extern __u32 cifs_lock_secret;
+
+extern mempool_t *cifs_mid_poolp;
+
+/* Operations for different SMB versions */
+#define SMB1_VERSION_STRING	"1.0"
+#define SMB20_VERSION_STRING    "2.0"
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+extern struct smb_version_operations smb1_operations;
+extern struct smb_version_values smb1_values;
+extern struct smb_version_operations smb20_operations;
+extern struct smb_version_values smb20_values;
+#endif /* CIFS_ALLOW_INSECURE_LEGACY */
+#define SMB21_VERSION_STRING	"2.1"
+extern struct smb_version_operations smb21_operations;
+extern struct smb_version_values smb21_values;
+#define SMBDEFAULT_VERSION_STRING "default"
+extern struct smb_version_values smbdefault_values;
+#define SMB3ANY_VERSION_STRING "3"
+extern struct smb_version_values smb3any_values;
+#define SMB30_VERSION_STRING	"3.0"
+extern struct smb_version_operations smb30_operations;
+extern struct smb_version_values smb30_values;
+#define SMB302_VERSION_STRING	"3.02"
+#define ALT_SMB302_VERSION_STRING "3.0.2"
+/*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
+extern struct smb_version_values smb302_values;
+#define SMB311_VERSION_STRING	"3.1.1"
+#define ALT_SMB311_VERSION_STRING "3.11"
+extern struct smb_version_operations smb311_operations;
+extern struct smb_version_values smb311_values;
+
+static inline char *get_security_type_str(enum securityEnum sectype)
+{
+	switch (sectype) {
+	case RawNTLMSSP:
+		return "RawNTLMSSP";
+	case Kerberos:
+		return "Kerberos";
+	case NTLMv2:
+		return "NTLMv2";
+	default:
+		return "Unknown";
+	}
+}
+
+static inline bool is_smb1_server(struct TCP_Server_Info *server)
+{
+	return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0;
+}
+
+static inline bool is_tcon_dfs(struct cifs_tcon *tcon)
+{
+	/*
+	 * For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS
+	 * Subsystem Notifies That a Share Is a DFS Share.
+	 *
+	 * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server
+	 * Application Updates a Share.
+	 */
+	if (!tcon || !tcon->ses || !tcon->ses->server)
+		return false;
+	return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS :
+		tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT);
+}
+
+static inline bool cifs_is_referral_server(struct cifs_tcon *tcon,
+					   const struct dfs_info3_param *ref)
+{
+	/*
+	 * Check if all targets are capable of handling DFS referrals as per
+	 * MS-DFSC 2.2.4 RESP_GET_DFS_REFERRAL.
+	 */
+	return is_tcon_dfs(tcon) || (ref && (ref->flags & DFSREF_REFERRAL_SERVER));
+}
+
+static inline u64 cifs_flock_len(const struct file_lock *fl)
+{
+	return (u64)fl->fl_end - fl->fl_start + 1;
+}
+
+static inline size_t ntlmssp_workstation_name_size(const struct cifs_ses *ses)
+{
+	if (WARN_ON_ONCE(!ses || !ses->server))
+		return 0;
+	/*
+	 * Make workstation name no more than 15 chars when using insecure dialects as some legacy
+	 * servers do require it during NTLMSSP.
+	 */
+	if (ses->server->dialect <= SMB20_PROT_ID)
+		return min_t(size_t, sizeof(ses->workstation_name), RFC1001_NAME_LEN_WITH_NULL);
+	return sizeof(ses->workstation_name);
+}
+
+static inline void move_cifs_info_to_smb2(struct smb2_file_all_info *dst, const FILE_ALL_INFO *src)
+{
+	memcpy(dst, src, (size_t)((u8 *)&src->AccessFlags - (u8 *)src));
+	dst->AccessFlags = src->AccessFlags;
+	dst->CurrentByteOffset = src->CurrentByteOffset;
+	dst->Mode = src->Mode;
+	dst->AlignmentRequirement = src->AlignmentRequirement;
+	dst->FileNameLength = src->FileNameLength;
+}
+
+static inline int cifs_get_num_sgs(const struct smb_rqst *rqst,
+				   int num_rqst,
+				   const u8 *sig)
+{
+	unsigned int len, skip;
+	unsigned int nents = 0;
+	unsigned long addr;
+	size_t data_size;
+	int i, j;
+
+	/*
+	 * The first rqst has a transform header where the first 20 bytes are
+	 * not part of the encrypted blob.
+	 */
+	skip = 20;
+
+	/* Assumes the first rqst has a transform header as the first iov.
+	 * I.e.
+	 * rqst[0].rq_iov[0]  is transform header
+	 * rqst[0].rq_iov[1+] data to be encrypted/decrypted
+	 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
+	 */
+	for (i = 0; i < num_rqst; i++) {
+		data_size = iov_iter_count(&rqst[i].rq_iter);
+
+		/* We really don't want a mixture of pinned and unpinned pages
+		 * in the sglist.  It's hard to keep track of which is what.
+		 * Instead, we convert to a BVEC-type iterator higher up.
+		 */
+		if (data_size &&
+		    WARN_ON_ONCE(user_backed_iter(&rqst[i].rq_iter)))
+			return -EIO;
+
+		/* We also don't want to have any extra refs or pins to clean
+		 * up in the sglist.
+		 */
+		if (data_size &&
+		    WARN_ON_ONCE(iov_iter_extract_will_pin(&rqst[i].rq_iter)))
+			return -EIO;
+
+		for (j = 0; j < rqst[i].rq_nvec; j++) {
+			struct kvec *iov = &rqst[i].rq_iov[j];
+
+			addr = (unsigned long)iov->iov_base + skip;
+			if (unlikely(is_vmalloc_addr((void *)addr))) {
+				len = iov->iov_len - skip;
+				nents += DIV_ROUND_UP(offset_in_page(addr) + len,
+						      PAGE_SIZE);
+			} else {
+				nents++;
+			}
+			skip = 0;
+		}
+		if (data_size)
+			nents += iov_iter_npages(&rqst[i].rq_iter, INT_MAX);
+	}
+	nents += DIV_ROUND_UP(offset_in_page(sig) + SMB2_SIGNATURE_SIZE, PAGE_SIZE);
+	return nents;
+}
+
+/* We can not use the normal sg_set_buf() as we will sometimes pass a
+ * stack object as buf.
+ */
+static inline void cifs_sg_set_buf(struct sg_table *sgtable,
+				   const void *buf,
+				   unsigned int buflen)
+{
+	unsigned long addr = (unsigned long)buf;
+	unsigned int off = offset_in_page(addr);
+
+	addr &= PAGE_MASK;
+	if (unlikely(is_vmalloc_addr((void *)addr))) {
+		do {
+			unsigned int len = min_t(unsigned int, buflen, PAGE_SIZE - off);
+
+			sg_set_page(&sgtable->sgl[sgtable->nents++],
+				    vmalloc_to_page((void *)addr), len, off);
+
+			off = 0;
+			addr += PAGE_SIZE;
+			buflen -= len;
+		} while (buflen);
+	} else {
+		sg_set_page(&sgtable->sgl[sgtable->nents++],
+			    virt_to_page((void *)addr), buflen, off);
+	}
+}
+
+struct smb2_compound_vars {
+	struct cifs_open_parms oparms;
+	struct kvec rsp_iov[3];
+	struct smb_rqst rqst[3];
+	struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
+	struct kvec qi_iov;
+	struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
+	struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
+	struct kvec close_iov;
+	struct smb2_file_rename_info rename_info;
+	struct smb2_file_link_info link_info;
+};
+
+#endif	/* _CIFS_GLOB_H */
diff --git a/fs/smb/client/cifspdu.h b/fs/smb/client/cifspdu.h
new file mode 100644
index 0000000000..c0513fbb8a
--- /dev/null
+++ b/fs/smb/client/cifspdu.h
@@ -0,0 +1,2722 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+/*
+ *
+ *   Copyright (c) International Business Machines  Corp., 2002,2009
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ */
+
+#ifndef _CIFSPDU_H
+#define _CIFSPDU_H
+
+#include <net/sock.h>
+#include <asm/unaligned.h>
+#include "../common/smbfsctl.h"
+
+#define CIFS_PROT   0
+#define POSIX_PROT  (CIFS_PROT+1)
+#define BAD_PROT 0xFFFF
+
+/* SMB command codes:
+ * Note some commands have minimal (wct=0,bcc=0), or uninteresting, responses
+ * (ie which include no useful data other than the SMB error code itself).
+ * This can allow us to avoid response buffer allocations and copy in some cases
+ */
+#define SMB_COM_CREATE_DIRECTORY      0x00 /* trivial response */
+#define SMB_COM_DELETE_DIRECTORY      0x01 /* trivial response */
+#define SMB_COM_CLOSE                 0x04 /* triv req/rsp, timestamp ignored */
+#define SMB_COM_FLUSH                 0x05 /* triv req/rsp */
+#define SMB_COM_DELETE                0x06 /* trivial response */
+#define SMB_COM_RENAME                0x07 /* trivial response */
+#define SMB_COM_QUERY_INFORMATION     0x08 /* aka getattr */
+#define SMB_COM_SETATTR               0x09 /* trivial response */
+#define SMB_COM_LOCKING_ANDX          0x24 /* trivial response */
+#define SMB_COM_COPY                  0x29 /* trivial rsp, fail filename ignrd*/
+#define SMB_COM_ECHO                  0x2B /* echo request */
+#define SMB_COM_OPEN_ANDX             0x2D /* Legacy open for old servers */
+#define SMB_COM_READ_ANDX             0x2E
+#define SMB_COM_WRITE_ANDX            0x2F
+#define SMB_COM_TRANSACTION2          0x32
+#define SMB_COM_TRANSACTION2_SECONDARY 0x33
+#define SMB_COM_FIND_CLOSE2           0x34 /* trivial response */
+#define SMB_COM_TREE_DISCONNECT       0x71 /* trivial response */
+#define SMB_COM_NEGOTIATE             0x72
+#define SMB_COM_SESSION_SETUP_ANDX    0x73
+#define SMB_COM_LOGOFF_ANDX           0x74 /* trivial response */
+#define SMB_COM_TREE_CONNECT_ANDX     0x75
+#define SMB_COM_NT_TRANSACT           0xA0
+#define SMB_COM_NT_TRANSACT_SECONDARY 0xA1
+#define SMB_COM_NT_CREATE_ANDX        0xA2
+#define SMB_COM_NT_CANCEL             0xA4 /* no response */
+#define SMB_COM_NT_RENAME             0xA5 /* trivial response */
+
+/* Transact2 subcommand codes */
+#define TRANS2_OPEN                   0x00
+#define TRANS2_FIND_FIRST             0x01
+#define TRANS2_FIND_NEXT              0x02
+#define TRANS2_QUERY_FS_INFORMATION   0x03
+#define TRANS2_SET_FS_INFORMATION     0x04
+#define TRANS2_QUERY_PATH_INFORMATION 0x05
+#define TRANS2_SET_PATH_INFORMATION   0x06
+#define TRANS2_QUERY_FILE_INFORMATION 0x07
+#define TRANS2_SET_FILE_INFORMATION   0x08
+#define TRANS2_GET_DFS_REFERRAL       0x10
+#define TRANS2_REPORT_DFS_INCOSISTENCY 0x11
+
+/* SMB Transact (Named Pipe) subcommand codes */
+#define TRANS_SET_NMPIPE_STATE      0x0001
+#define TRANS_RAW_READ_NMPIPE       0x0011
+#define TRANS_QUERY_NMPIPE_STATE    0x0021
+#define TRANS_QUERY_NMPIPE_INFO     0x0022
+#define TRANS_PEEK_NMPIPE           0x0023
+#define TRANS_TRANSACT_NMPIPE       0x0026
+#define TRANS_RAW_WRITE_NMPIPE      0x0031
+#define TRANS_READ_NMPIPE           0x0036
+#define TRANS_WRITE_NMPIPE          0x0037
+#define TRANS_WAIT_NMPIPE           0x0053
+#define TRANS_CALL_NMPIPE           0x0054
+
+/* NT Transact subcommand codes */
+#define NT_TRANSACT_CREATE            0x01
+#define NT_TRANSACT_IOCTL             0x02
+#define NT_TRANSACT_SET_SECURITY_DESC 0x03
+#define NT_TRANSACT_NOTIFY_CHANGE     0x04
+#define NT_TRANSACT_RENAME            0x05
+#define NT_TRANSACT_QUERY_SECURITY_DESC 0x06
+#define NT_TRANSACT_GET_USER_QUOTA    0x07
+#define NT_TRANSACT_SET_USER_QUOTA    0x08
+
+#define MAX_CIFS_SMALL_BUFFER_SIZE 448 /* big enough for most */
+/* future chained NTCreateXReadX bigger, but for time being NTCreateX biggest */
+/* among the requests (NTCreateX response is bigger with wct of 34) */
+#define MAX_CIFS_HDR_SIZE 0x58 /* 4 len + 32 hdr + (2*24 wct) + 2 bct + 2 pad */
+#define CIFS_SMALL_PATH 120 /* allows for (448-88)/3 */
+
+/* internal cifs vfs structures */
+/*****************************************************************
+ * All constants go here
+ *****************************************************************
+ */
+
+/*
+ * Starting value for maximum SMB size negotiation
+ */
+#define CIFS_MAX_MSGSIZE (4*4096)
+
+/*
+ * Size of encrypted user password in bytes
+ */
+#define CIFS_ENCPWD_SIZE (16)
+
+/*
+ * Size of the crypto key returned on the negotiate SMB in bytes
+ */
+#define CIFS_CRYPTO_KEY_SIZE (8)
+
+/*
+ * Size of the ntlm client response
+ */
+#define CIFS_AUTH_RESP_SIZE (24)
+
+/*
+ * Size of the session key (crypto key encrypted with the password
+ */
+#define CIFS_SESS_KEY_SIZE (16)
+
+#define CIFS_SERVER_CHALLENGE_SIZE (8)
+#define CIFS_HMAC_MD5_HASH_SIZE (16)
+#define CIFS_CPHTXT_SIZE (16)
+#define CIFS_NTHASH_SIZE (16)
+
+/*
+ * Maximum user name length
+ */
+#define CIFS_UNLEN (20)
+
+/*
+ * Flags on SMB open
+ */
+#define SMBOPEN_WRITE_THROUGH 0x4000
+#define SMBOPEN_DENY_ALL      0x0010
+#define SMBOPEN_DENY_WRITE    0x0020
+#define SMBOPEN_DENY_READ     0x0030
+#define SMBOPEN_DENY_NONE     0x0040
+#define SMBOPEN_READ          0x0000
+#define SMBOPEN_WRITE         0x0001
+#define SMBOPEN_READWRITE     0x0002
+#define SMBOPEN_EXECUTE       0x0003
+
+#define SMBOPEN_OCREATE       0x0010
+#define SMBOPEN_OTRUNC        0x0002
+#define SMBOPEN_OAPPEND       0x0001
+
+/*
+ * SMB flag definitions
+ */
+#define SMBFLG_EXTD_LOCK 0x01	/* server supports lock-read write-unlock smb */
+#define SMBFLG_RCV_POSTED 0x02	/* obsolete */
+#define SMBFLG_RSVD 0x04
+#define SMBFLG_CASELESS 0x08	/* all pathnames treated as caseless (off
+				implies case sensitive file handling request) */
+#define SMBFLG_CANONICAL_PATH_FORMAT 0x10	/* obsolete */
+#define SMBFLG_OLD_OPLOCK 0x20	/* obsolete */
+#define SMBFLG_OLD_OPLOCK_NOTIFY 0x40	/* obsolete */
+#define SMBFLG_RESPONSE 0x80	/* this PDU is a response from server */
+
+/*
+ * SMB flag2 definitions
+ */
+#define SMBFLG2_KNOWS_LONG_NAMES cpu_to_le16(1)	/* can send long (non-8.3)
+						   path names in response */
+#define SMBFLG2_KNOWS_EAS cpu_to_le16(2)
+#define SMBFLG2_SECURITY_SIGNATURE cpu_to_le16(4)
+#define SMBFLG2_COMPRESSED (8)
+#define SMBFLG2_SECURITY_SIGNATURE_REQUIRED (0x10)
+#define SMBFLG2_IS_LONG_NAME cpu_to_le16(0x40)
+#define SMBFLG2_REPARSE_PATH (0x400)
+#define SMBFLG2_EXT_SEC cpu_to_le16(0x800)
+#define SMBFLG2_DFS cpu_to_le16(0x1000)
+#define SMBFLG2_PAGING_IO cpu_to_le16(0x2000)
+#define SMBFLG2_ERR_STATUS cpu_to_le16(0x4000)
+#define SMBFLG2_UNICODE cpu_to_le16(0x8000)
+
+/*
+ * These are the file access permission bits defined in CIFS for the
+ * NTCreateAndX as well as the level 0x107
+ * TRANS2_QUERY_PATH_INFORMATION API.  The level 0x107, SMB_QUERY_FILE_ALL_INFO
+ * responds with the AccessFlags.
+ * The AccessFlags specifies the access permissions a caller has to the
+ * file and can have any suitable combination of the following values:
+ */
+
+#define FILE_READ_DATA        0x00000001  /* Data can be read from the file   */
+#define FILE_WRITE_DATA       0x00000002  /* Data can be written to the file  */
+#define FILE_APPEND_DATA      0x00000004  /* Data can be appended to the file */
+#define FILE_READ_EA          0x00000008  /* Extended attributes associated   */
+					  /* with the file can be read        */
+#define FILE_WRITE_EA         0x00000010  /* Extended attributes associated   */
+					  /* with the file can be written     */
+#define FILE_EXECUTE          0x00000020  /*Data can be read into memory from */
+					  /* the file using system paging I/O */
+#define FILE_DELETE_CHILD     0x00000040
+#define FILE_READ_ATTRIBUTES  0x00000080  /* Attributes associated with the   */
+					  /* file can be read                 */
+#define FILE_WRITE_ATTRIBUTES 0x00000100  /* Attributes associated with the   */
+					  /* file can be written              */
+#define DELETE                0x00010000  /* The file can be deleted          */
+#define READ_CONTROL          0x00020000  /* The access control list and      */
+					  /* ownership associated with the    */
+					  /* file can be read                 */
+#define WRITE_DAC             0x00040000  /* The access control list and      */
+					  /* ownership associated with the    */
+					  /* file can be written.             */
+#define WRITE_OWNER           0x00080000  /* Ownership information associated */
+					  /* with the file can be written     */
+#define SYNCHRONIZE           0x00100000  /* The file handle can waited on to */
+					  /* synchronize with the completion  */
+					  /* of an input/output request       */
+#define SYSTEM_SECURITY       0x01000000  /* The system access control list   */
+					  /* can be read and changed          */
+#define GENERIC_ALL           0x10000000
+#define GENERIC_EXECUTE       0x20000000
+#define GENERIC_WRITE         0x40000000
+#define GENERIC_READ          0x80000000
+					 /* In summary - Relevant file       */
+					 /* access flags from CIFS are       */
+					 /* file_read_data, file_write_data  */
+					 /* file_execute, file_read_attributes*/
+					 /* write_dac, and delete.           */
+
+#define FILE_READ_RIGHTS (FILE_READ_DATA | FILE_READ_EA | FILE_READ_ATTRIBUTES)
+#define FILE_WRITE_RIGHTS (FILE_WRITE_DATA | FILE_APPEND_DATA \
+				| FILE_WRITE_EA | FILE_WRITE_ATTRIBUTES)
+#define FILE_EXEC_RIGHTS (FILE_EXECUTE)
+
+#define SET_FILE_READ_RIGHTS (FILE_READ_DATA | FILE_READ_EA | FILE_WRITE_EA \
+				| FILE_READ_ATTRIBUTES \
+				| FILE_WRITE_ATTRIBUTES \
+				| DELETE | READ_CONTROL | WRITE_DAC \
+				| WRITE_OWNER | SYNCHRONIZE)
+#define SET_FILE_WRITE_RIGHTS (FILE_WRITE_DATA | FILE_APPEND_DATA \
+				| FILE_READ_EA | FILE_WRITE_EA \
+				| FILE_READ_ATTRIBUTES \
+				| FILE_WRITE_ATTRIBUTES \
+				| DELETE | READ_CONTROL | WRITE_DAC \
+				| WRITE_OWNER | SYNCHRONIZE)
+#define SET_FILE_EXEC_RIGHTS (FILE_READ_EA | FILE_WRITE_EA | FILE_EXECUTE \
+				| FILE_READ_ATTRIBUTES \
+				| FILE_WRITE_ATTRIBUTES \
+				| DELETE | READ_CONTROL | WRITE_DAC \
+				| WRITE_OWNER | SYNCHRONIZE)
+
+#define SET_MINIMUM_RIGHTS (FILE_READ_EA | FILE_READ_ATTRIBUTES \
+				| READ_CONTROL | SYNCHRONIZE)
+
+
+/*
+ * Invalid readdir handle
+ */
+#define CIFS_NO_HANDLE        0xFFFF
+
+#define NO_CHANGE_64          0xFFFFFFFFFFFFFFFFULL
+
+/* IPC$ in ASCII */
+#define CIFS_IPC_RESOURCE "\x49\x50\x43\x24"
+
+/* IPC$ in Unicode */
+#define CIFS_IPC_UNICODE_RESOURCE "\x00\x49\x00\x50\x00\x43\x00\x24\x00\x00"
+
+/* Unicode Null terminate 2 bytes of 0 */
+#define UNICODE_NULL "\x00\x00"
+#define ASCII_NULL 0x00
+
+/*
+ * Server type values (returned on EnumServer API
+ */
+#define CIFS_SV_TYPE_DC     0x00000008
+#define CIFS_SV_TYPE_BACKDC 0x00000010
+
+/*
+ * Alias type flags (From EnumAlias API call
+ */
+#define CIFS_ALIAS_TYPE_FILE 0x0001
+#define CIFS_SHARE_TYPE_FILE 0x0000
+
+/*
+ * File Attribute flags
+ */
+#define ATTR_READONLY  0x0001
+#define ATTR_HIDDEN    0x0002
+#define ATTR_SYSTEM    0x0004
+#define ATTR_VOLUME    0x0008
+#define ATTR_DIRECTORY 0x0010
+#define ATTR_ARCHIVE   0x0020
+#define ATTR_DEVICE    0x0040
+#define ATTR_NORMAL    0x0080
+#define ATTR_TEMPORARY 0x0100
+#define ATTR_SPARSE    0x0200
+#define ATTR_REPARSE   0x0400
+#define ATTR_COMPRESSED 0x0800
+#define ATTR_OFFLINE    0x1000	/* ie file not immediately available -
+					on offline storage */
+#define ATTR_NOT_CONTENT_INDEXED 0x2000
+#define ATTR_ENCRYPTED  0x4000
+#define ATTR_POSIX_SEMANTICS 0x01000000
+#define ATTR_BACKUP_SEMANTICS 0x02000000
+#define ATTR_DELETE_ON_CLOSE 0x04000000
+#define ATTR_SEQUENTIAL_SCAN 0x08000000
+#define ATTR_RANDOM_ACCESS   0x10000000
+#define ATTR_NO_BUFFERING    0x20000000
+#define ATTR_WRITE_THROUGH   0x80000000
+
+/* ShareAccess flags */
+#define FILE_NO_SHARE     0x00000000
+#define FILE_SHARE_READ   0x00000001
+#define FILE_SHARE_WRITE  0x00000002
+#define FILE_SHARE_DELETE 0x00000004
+#define FILE_SHARE_ALL    0x00000007
+
+/* CreateDisposition flags, similar to CreateAction as well */
+#define FILE_SUPERSEDE    0x00000000
+#define FILE_OPEN         0x00000001
+#define FILE_CREATE       0x00000002
+#define FILE_OPEN_IF      0x00000003
+#define FILE_OVERWRITE    0x00000004
+#define FILE_OVERWRITE_IF 0x00000005
+
+/* CreateOptions */
+#define CREATE_NOT_FILE		0x00000001	/* if set must not be file */
+#define CREATE_WRITE_THROUGH	0x00000002
+#define CREATE_SEQUENTIAL       0x00000004
+#define CREATE_NO_BUFFER        0x00000008      /* should not buffer on srv */
+#define CREATE_SYNC_ALERT       0x00000010	/* MBZ */
+#define CREATE_ASYNC_ALERT      0x00000020	/* MBZ */
+#define CREATE_NOT_DIR		0x00000040    /* if set must not be directory */
+#define CREATE_TREE_CONNECTION  0x00000080	/* should be zero */
+#define CREATE_COMPLETE_IF_OPLK 0x00000100	/* should be zero */
+#define CREATE_NO_EA_KNOWLEDGE  0x00000200
+#define CREATE_EIGHT_DOT_THREE  0x00000400	/* doc says this is obsolete
+						 "open for recovery" flag should
+						 be zero in any case */
+#define CREATE_OPEN_FOR_RECOVERY 0x00000400
+#define CREATE_RANDOM_ACCESS	0x00000800
+#define CREATE_DELETE_ON_CLOSE	0x00001000
+#define CREATE_OPEN_BY_ID       0x00002000
+#define CREATE_OPEN_BACKUP_INTENT 0x00004000
+#define CREATE_NO_COMPRESSION   0x00008000
+#define CREATE_RESERVE_OPFILTER 0x00100000	/* should be zero */
+#define OPEN_REPARSE_POINT	0x00200000
+#define OPEN_NO_RECALL          0x00400000
+#define OPEN_FREE_SPACE_QUERY   0x00800000	/* should be zero */
+#define CREATE_OPTIONS_MASK     0x007FFFFF
+#define CREATE_OPTION_READONLY	0x10000000
+#define CREATE_OPTION_SPECIAL   0x20000000   /* system. NB not sent over wire */
+
+/* ImpersonationLevel flags */
+#define SECURITY_ANONYMOUS      0
+#define SECURITY_IDENTIFICATION 1
+#define SECURITY_IMPERSONATION  2
+#define SECURITY_DELEGATION     3
+
+/* SecurityFlags */
+#define SECURITY_CONTEXT_TRACKING 0x01
+#define SECURITY_EFFECTIVE_ONLY   0x02
+
+/*
+ * Default PID value, used in all SMBs where the PID is not important
+ */
+#define CIFS_DFT_PID  0x1234
+
+/*
+ * We use the same routine for Copy and Move SMBs.  This flag is used to
+ * distinguish
+ */
+#define CIFS_COPY_OP 1
+#define CIFS_RENAME_OP 2
+
+#define GETU16(var)  (*((__u16 *)var))	/* BB check for endian issues */
+#define GETU32(var)  (*((__u32 *)var))	/* BB check for endian issues */
+
+struct smb_hdr {
+	__be32 smb_buf_length;	/* BB length is only two (rarely three) bytes,
+		with one or two byte "type" preceding it that will be
+		zero - we could mask the type byte off */
+	__u8 Protocol[4];
+	__u8 Command;
+	union {
+		struct {
+			__u8 ErrorClass;
+			__u8 Reserved;
+			__le16 Error;
+		} __attribute__((packed)) DosError;
+		__le32 CifsError;
+	} __attribute__((packed)) Status;
+	__u8 Flags;
+	__le16 Flags2;		/* note: le */
+	__le16 PidHigh;
+	union {
+		struct {
+			__le32 SequenceNumber;  /* le */
+			__u32 Reserved; /* zero */
+		} __attribute__((packed)) Sequence;
+		__u8 SecuritySignature[8];	/* le */
+	} __attribute__((packed)) Signature;
+	__u8 pad[2];
+	__u16 Tid;
+	__le16 Pid;
+	__u16 Uid;
+	__le16 Mid;
+	__u8 WordCount;
+} __attribute__((packed));
+
+/* given a pointer to an smb_hdr, retrieve a void pointer to the ByteCount */
+static inline void *
+BCC(struct smb_hdr *smb)
+{
+	return (void *)smb + sizeof(*smb) + 2 * smb->WordCount;
+}
+
+/* given a pointer to an smb_hdr retrieve the pointer to the byte area */
+#define pByteArea(smb_var) (BCC(smb_var) + 2)
+
+/* get the unconverted ByteCount for a SMB packet and return it */
+static inline __u16
+get_bcc(struct smb_hdr *hdr)
+{
+	__le16 *bc_ptr = (__le16 *)BCC(hdr);
+
+	return get_unaligned_le16(bc_ptr);
+}
+
+/* set the ByteCount for a SMB packet in little-endian */
+static inline void
+put_bcc(__u16 count, struct smb_hdr *hdr)
+{
+	__le16 *bc_ptr = (__le16 *)BCC(hdr);
+
+	put_unaligned_le16(count, bc_ptr);
+}
+
+/*
+ * Computer Name Length (since Netbios name was length 16 with last byte 0x20)
+ * No longer as important, now that TCP names are more commonly used to
+ * resolve hosts.
+ */
+#define CNLEN 15
+
+/*
+ * Share Name Length (SNLEN)
+ * Note:  This length was limited by the SMB used to get
+ *        the Share info.   NetShareEnum only returned 13
+ *        chars, including the null termination.
+ * This was removed because it no longer is limiting.
+ */
+
+/*
+ * Comment Length
+ */
+#define MAXCOMMENTLEN 40
+
+/*
+ * The OS/2 maximum path name
+ */
+#define MAX_PATHCONF 256
+
+/*
+ *  SMB frame definitions  (following must be packed structs)
+ *  See the SNIA CIFS Specification for details.
+ *
+ *  The Naming convention is the lower case version of the
+ *  smb command code name for the struct and this is typedef to the
+ *  uppercase version of the same name with the prefix SMB_ removed
+ *  for brevity.  Although typedefs are not commonly used for
+ *  structure definitions in the Linux kernel, their use in the
+ *  CIFS standards document, which this code is based on, may
+ *  make this one of the cases where typedefs for structures make
+ *  sense to improve readability for readers of the standards doc.
+ *  Typedefs can always be removed later if they are too distracting
+ *  and they are only used for the CIFSs PDUs themselves, not
+ *  internal cifs vfs structures
+ *
+ */
+
+typedef struct negotiate_req {
+	struct smb_hdr hdr;	/* wct = 0 */
+	__le16 ByteCount;
+	unsigned char DialectsArray[];
+} __attribute__((packed)) NEGOTIATE_REQ;
+
+#define MIN_TZ_ADJ (15 * 60) /* minimum grid for timezones in seconds */
+
+#define READ_RAW_ENABLE 1
+#define WRITE_RAW_ENABLE 2
+#define RAW_ENABLE (READ_RAW_ENABLE | WRITE_RAW_ENABLE)
+#define SMB1_CLIENT_GUID_SIZE (16)
+typedef struct negotiate_rsp {
+	struct smb_hdr hdr;	/* wct = 17 */
+	__le16 DialectIndex; /* 0xFFFF = no dialect acceptable */
+	__u8 SecurityMode;
+	__le16 MaxMpxCount;
+	__le16 MaxNumberVcs;
+	__le32 MaxBufferSize;
+	__le32 MaxRawSize;
+	__le32 SessionKey;
+	__le32 Capabilities;	/* see below */
+	__le32 SystemTimeLow;
+	__le32 SystemTimeHigh;
+	__le16 ServerTimeZone;
+	__u8 EncryptionKeyLength;
+	__u16 ByteCount;
+	union {
+		/* cap extended security off */
+		DECLARE_FLEX_ARRAY(unsigned char, EncryptionKey);
+		/* followed by Domain name - if extended security is off */
+		/* followed by 16 bytes of server GUID */
+		/* then security blob if cap_extended_security negotiated */
+		struct {
+			unsigned char GUID[SMB1_CLIENT_GUID_SIZE];
+			unsigned char SecurityBlob[];
+		} __attribute__((packed)) extended_response;
+	} __attribute__((packed)) u;
+} __attribute__((packed)) NEGOTIATE_RSP;
+
+/* SecurityMode bits */
+#define SECMODE_USER          0x01	/* off indicates share level security */
+#define SECMODE_PW_ENCRYPT    0x02
+#define SECMODE_SIGN_ENABLED  0x04	/* SMB security signatures enabled */
+#define SECMODE_SIGN_REQUIRED 0x08	/* SMB security signatures required */
+
+/* Negotiate response Capabilities */
+#define CAP_RAW_MODE           0x00000001
+#define CAP_MPX_MODE           0x00000002
+#define CAP_UNICODE            0x00000004
+#define CAP_LARGE_FILES        0x00000008
+#define CAP_NT_SMBS            0x00000010	/* implies CAP_NT_FIND */
+#define CAP_RPC_REMOTE_APIS    0x00000020
+#define CAP_STATUS32           0x00000040
+#define CAP_LEVEL_II_OPLOCKS   0x00000080
+#define CAP_LOCK_AND_READ      0x00000100
+#define CAP_NT_FIND            0x00000200
+#define CAP_DFS                0x00001000
+#define CAP_INFOLEVEL_PASSTHRU 0x00002000
+#define CAP_LARGE_READ_X       0x00004000
+#define CAP_LARGE_WRITE_X      0x00008000
+#define CAP_LWIO               0x00010000 /* support fctl_srv_req_resume_key */
+#define CAP_UNIX               0x00800000
+#define CAP_COMPRESSED_DATA    0x02000000
+#define CAP_DYNAMIC_REAUTH     0x20000000
+#define CAP_PERSISTENT_HANDLES 0x40000000
+#define CAP_EXTENDED_SECURITY  0x80000000
+
+typedef union smb_com_session_setup_andx {
+	struct {		/* request format */
+		struct smb_hdr hdr;	/* wct = 12 */
+		__u8 AndXCommand;
+		__u8 AndXReserved;
+		__le16 AndXOffset;
+		__le16 MaxBufferSize;
+		__le16 MaxMpxCount;
+		__le16 VcNumber;
+		__u32 SessionKey;
+		__le16 SecurityBlobLength;
+		__u32 Reserved;
+		__le32 Capabilities;	/* see below */
+		__le16 ByteCount;
+		unsigned char SecurityBlob[];	/* followed by */
+		/* STRING NativeOS */
+		/* STRING NativeLanMan */
+	} __attribute__((packed)) req;	/* NTLM request format (with
+					extended security */
+
+	struct {		/* request format */
+		struct smb_hdr hdr;	/* wct = 13 */
+		__u8 AndXCommand;
+		__u8 AndXReserved;
+		__le16 AndXOffset;
+		__le16 MaxBufferSize;
+		__le16 MaxMpxCount;
+		__le16 VcNumber;
+		__u32 SessionKey;
+		__le16 CaseInsensitivePasswordLength; /* ASCII password len */
+		__le16 CaseSensitivePasswordLength; /* Unicode password length*/
+		__u32 Reserved;	/* see below */
+		__le32 Capabilities;
+		__le16 ByteCount;
+		unsigned char CaseInsensitivePassword[];     /* followed by: */
+		/* unsigned char * CaseSensitivePassword; */
+		/* STRING AccountName */
+		/* STRING PrimaryDomain */
+		/* STRING NativeOS */
+		/* STRING NativeLanMan */
+	} __attribute__((packed)) req_no_secext; /* NTLM request format (without
+							extended security */
+
+	struct {		/* default (NTLM) response format */
+		struct smb_hdr hdr;	/* wct = 4 */
+		__u8 AndXCommand;
+		__u8 AndXReserved;
+		__le16 AndXOffset;
+		__le16 Action;	/* see below */
+		__le16 SecurityBlobLength;
+		__u16 ByteCount;
+		unsigned char SecurityBlob[];	/* followed by */
+/*      unsigned char  * NativeOS;      */
+/*	unsigned char  * NativeLanMan;  */
+/*      unsigned char  * PrimaryDomain; */
+	} __attribute__((packed)) resp;	/* NTLM response
+					   (with or without extended sec) */
+
+	struct {		/* request format */
+		struct smb_hdr hdr;	/* wct = 10 */
+		__u8 AndXCommand;
+		__u8 AndXReserved;
+		__le16 AndXOffset;
+		__le16 MaxBufferSize;
+		__le16 MaxMpxCount;
+		__le16 VcNumber;
+		__u32 SessionKey;
+		__le16 PasswordLength;
+		__u32 Reserved; /* encrypt key len and offset */
+		__le16 ByteCount;
+		unsigned char AccountPassword[];	/* followed by */
+		/* STRING AccountName */
+		/* STRING PrimaryDomain */
+		/* STRING NativeOS */
+		/* STRING NativeLanMan */
+	} __attribute__((packed)) old_req; /* pre-NTLM (LANMAN2.1) req format */
+
+	struct {		/* default (NTLM) response format */
+		struct smb_hdr hdr;	/* wct = 3 */
+		__u8 AndXCommand;
+		__u8 AndXReserved;
+		__le16 AndXOffset;
+		__le16 Action;	/* see below */
+		__u16 ByteCount;
+		unsigned char NativeOS[];	/* followed by */
+/*	unsigned char * NativeLanMan; */
+/*      unsigned char * PrimaryDomain; */
+	} __attribute__((packed)) old_resp; /* pre-NTLM (LANMAN2.1) response */
+} __attribute__((packed)) SESSION_SETUP_ANDX;
+
+/* format of NLTMv2 Response ie "case sensitive password" hash when NTLMv2 */
+
+#define NTLMSSP_SERVER_TYPE	1
+#define NTLMSSP_DOMAIN_TYPE	2
+#define NTLMSSP_FQ_DOMAIN_TYPE	3
+#define NTLMSSP_DNS_DOMAIN_TYPE	4
+#define NTLMSSP_DNS_PARENT_TYPE	5
+
+struct ntlmssp2_name {
+	__le16 type;
+	__le16 length;
+/*	char   name[length]; */
+} __attribute__((packed));
+
+struct ntlmv2_resp {
+	union {
+	    char ntlmv2_hash[CIFS_ENCPWD_SIZE];
+	    struct {
+		__u8 reserved[8];
+		__u8 key[CIFS_SERVER_CHALLENGE_SIZE];
+	    } __attribute__((packed)) challenge;
+	} __attribute__((packed));
+	__le32 blob_signature;
+	__u32  reserved;
+	__le64  time;
+	__u64  client_chal; /* random */
+	__u32  reserved2;
+	/* array of name entries could follow ending in minimum 4 byte struct */
+} __attribute__((packed));
+
+
+#define CIFS_NETWORK_OPSYS "CIFS VFS Client for Linux"
+
+/* Capabilities bits (for NTLM SessSetup request) */
+#define CAP_UNICODE            0x00000004
+#define CAP_LARGE_FILES        0x00000008
+#define CAP_NT_SMBS            0x00000010
+#define CAP_STATUS32           0x00000040
+#define CAP_LEVEL_II_OPLOCKS   0x00000080
+#define CAP_NT_FIND            0x00000200	/* reserved should be zero
+				(because NT_SMBs implies the same thing?) */
+#define CAP_BULK_TRANSFER      0x20000000
+#define CAP_EXTENDED_SECURITY  0x80000000
+
+/* Action bits */
+#define GUEST_LOGIN 1
+
+typedef struct smb_com_tconx_req {
+	struct smb_hdr hdr;	/* wct = 4 */
+	__u8 AndXCommand;
+	__u8 AndXReserved;
+	__le16 AndXOffset;
+	__le16 Flags;		/* see below */
+	__le16 PasswordLength;
+	__le16 ByteCount;
+	unsigned char Password[];	/* followed by */
+/* STRING Path    *//* \\server\share name */
+	/* STRING Service */
+} __attribute__((packed)) TCONX_REQ;
+
+typedef struct smb_com_tconx_rsp {
+	struct smb_hdr hdr;	/* wct = 3 , not extended response */
+	__u8 AndXCommand;
+	__u8 AndXReserved;
+	__le16 AndXOffset;
+	__le16 OptionalSupport;	/* see below */
+	__u16 ByteCount;
+	unsigned char Service[];	/* always ASCII, not Unicode */
+	/* STRING NativeFileSystem */
+} __attribute__((packed)) TCONX_RSP;
+
+typedef struct smb_com_tconx_rsp_ext {
+	struct smb_hdr hdr;	/* wct = 7, extended response */
+	__u8 AndXCommand;
+	__u8 AndXReserved;
+	__le16 AndXOffset;
+	__le16 OptionalSupport;	/* see below */
+	__le32 MaximalShareAccessRights;
+	__le32 GuestMaximalShareAccessRights;
+	__u16 ByteCount;
+	unsigned char Service[];	/* always ASCII, not Unicode */
+	/* STRING NativeFileSystem */
+} __attribute__((packed)) TCONX_RSP_EXT;
+
+
+/* tree connect Flags */
+#define DISCONNECT_TID          0x0001
+#define TCON_EXTENDED_SIGNATURES 0x0004
+#define TCON_EXTENDED_SECINFO   0x0008
+
+/* OptionalSupport bits */
+#define SMB_SUPPORT_SEARCH_BITS 0x0001	/* "must have" directory search bits
+					 (exclusive searches supported) */
+#define SMB_SHARE_IS_IN_DFS     0x0002
+#define SMB_CSC_MASK               0x000C
+/* CSC flags defined as follows */
+#define SMB_CSC_CACHE_MANUAL_REINT 0x0000
+#define SMB_CSC_CACHE_AUTO_REINT   0x0004
+#define SMB_CSC_CACHE_VDO          0x0008
+#define SMB_CSC_NO_CACHING         0x000C
+#define SMB_UNIQUE_FILE_NAME    0x0010
+#define SMB_EXTENDED_SIGNATURES 0x0020
+
+/* services
+ *
+ * A:       ie disk
+ * LPT1:    ie printer
+ * IPC      ie named pipe
+ * COMM
+ * ?????    ie any type
+ *
+ */
+
+typedef struct smb_com_echo_req {
+	struct	smb_hdr hdr;
+	__le16	EchoCount;
+	__le16	ByteCount;
+	char	Data[];
+} __attribute__((packed)) ECHO_REQ;
+
+typedef struct smb_com_echo_rsp {
+	struct	smb_hdr hdr;
+	__le16	SequenceNumber;
+	__le16	ByteCount;
+	char	Data[];
+} __attribute__((packed)) ECHO_RSP;
+
+typedef struct smb_com_logoff_andx_req {
+	struct smb_hdr hdr;	/* wct = 2 */
+	__u8 AndXCommand;
+	__u8 AndXReserved;
+	__u16 AndXOffset;
+	__u16 ByteCount;
+} __attribute__((packed)) LOGOFF_ANDX_REQ;
+
+typedef struct smb_com_logoff_andx_rsp {
+	struct smb_hdr hdr;	/* wct = 2 */
+	__u8 AndXCommand;
+	__u8 AndXReserved;
+	__u16 AndXOffset;
+	__u16 ByteCount;
+} __attribute__((packed)) LOGOFF_ANDX_RSP;
+
+typedef union smb_com_tree_disconnect {	/* as an altetnative can use flag on
+					tree_connect PDU to effect disconnect */
+					/* tdis is probably simplest SMB PDU */
+	struct {
+		struct smb_hdr hdr;	/* wct = 0 */
+		__u16 ByteCount;	/* bcc = 0 */
+	} __attribute__((packed)) req;
+	struct {
+		struct smb_hdr hdr;	/* wct = 0 */
+		__u16 ByteCount;	/* bcc = 0 */
+	} __attribute__((packed)) resp;
+} __attribute__((packed)) TREE_DISCONNECT;
+
+typedef struct smb_com_close_req {
+	struct smb_hdr hdr;	/* wct = 3 */
+	__u16 FileID;
+	__u32 LastWriteTime;	/* should be zero or -1 */
+	__u16 ByteCount;	/* 0 */
+} __attribute__((packed)) CLOSE_REQ;
+
+typedef struct smb_com_close_rsp {
+	struct smb_hdr hdr;	/* wct = 0 */
+	__u16 ByteCount;	/* bct = 0 */
+} __attribute__((packed)) CLOSE_RSP;
+
+typedef struct smb_com_flush_req {
+	struct smb_hdr hdr;	/* wct = 1 */
+	__u16 FileID;
+	__u16 ByteCount;	/* 0 */
+} __attribute__((packed)) FLUSH_REQ;
+
+typedef struct smb_com_findclose_req {
+	struct smb_hdr hdr; /* wct = 1 */
+	__u16 FileID;
+	__u16 ByteCount;    /* 0 */
+} __attribute__((packed)) FINDCLOSE_REQ;
+
+/* OpenFlags */
+#define REQ_MORE_INFO      0x00000001  /* legacy (OPEN_AND_X) only */
+#define REQ_OPLOCK         0x00000002
+#define REQ_BATCHOPLOCK    0x00000004
+#define REQ_OPENDIRONLY    0x00000008
+#define REQ_EXTENDED_INFO  0x00000010
+
+/* File type */
+#define DISK_TYPE		0x0000
+#define BYTE_PIPE_TYPE		0x0001
+#define MESSAGE_PIPE_TYPE	0x0002
+#define PRINTER_TYPE		0x0003
+#define COMM_DEV_TYPE		0x0004
+#define UNKNOWN_TYPE		0xFFFF
+
+/* Device Type or File Status Flags */
+#define NO_EAS			0x0001
+#define NO_SUBSTREAMS		0x0002
+#define NO_REPARSETAG		0x0004
+/* following flags can apply if pipe */
+#define ICOUNT_MASK		0x00FF
+#define PIPE_READ_MODE		0x0100
+#define NAMED_PIPE_TYPE		0x0400
+#define PIPE_END_POINT		0x4000
+#define BLOCKING_NAMED_PIPE	0x8000
+
+typedef struct smb_com_open_req {	/* also handles create */
+	struct smb_hdr hdr;	/* wct = 24 */
+	__u8 AndXCommand;
+	__u8 AndXReserved;
+	__le16 AndXOffset;
+	__u8 Reserved;		/* Must Be Zero */
+	__le16 NameLength;
+	__le32 OpenFlags;
+	__u32  RootDirectoryFid;
+	__le32 DesiredAccess;
+	__le64 AllocationSize;
+	__le32 FileAttributes;
+	__le32 ShareAccess;
+	__le32 CreateDisposition;
+	__le32 CreateOptions;
+	__le32 ImpersonationLevel;
+	__u8 SecurityFlags;
+	__le16 ByteCount;
+	char fileName[];
+} __attribute__((packed)) OPEN_REQ;
+
+/* open response: oplock levels */
+#define OPLOCK_NONE  	 0
+#define OPLOCK_EXCLUSIVE 1
+#define OPLOCK_BATCH	 2
+#define OPLOCK_READ	 3  /* level 2 oplock */
+
+/* open response for CreateAction shifted left */
+#define CIFS_CREATE_ACTION 0x20000 /* file created */
+
+typedef struct smb_com_open_rsp {
+	struct smb_hdr hdr;	/* wct = 34 BB */
+	__u8 AndXCommand;
+	__u8 AndXReserved;
+	__le16 AndXOffset;
+	__u8 OplockLevel;
+	__u16 Fid;
+	__le32 CreateAction;
+	struct_group(common_attributes,
+		__le64 CreationTime;
+		__le64 LastAccessTime;
+		__le64 LastWriteTime;
+		__le64 ChangeTime;
+		__le32 FileAttributes;
+	);
+	__le64 AllocationSize;
+	__le64 EndOfFile;
+	__le16 FileType;
+	__le16 DeviceState;
+	__u8 DirectoryFlag;
+	__u16 ByteCount;	/* bct = 0 */
+} __attribute__((packed)) OPEN_RSP;
+
+typedef struct smb_com_open_rsp_ext {
+	struct smb_hdr hdr;     /* wct = 42 but meaningless due to MS bug? */
+	__u8 AndXCommand;
+	__u8 AndXReserved;
+	__le16 AndXOffset;
+	__u8 OplockLevel;
+	__u16 Fid;
+	__le32 CreateAction;
+	__le64 CreationTime;
+	__le64 LastAccessTime;
+	__le64 LastWriteTime;
+	__le64 ChangeTime;
+	__le32 FileAttributes;
+	__le64 AllocationSize;
+	__le64 EndOfFile;
+	__le16 FileType;
+	__le16 DeviceState;
+	__u8 DirectoryFlag;
+	__u8 VolumeGUID[16];
+	__u64 FileId; /* note no endian conversion - is opaque UniqueID */
+	__le32 MaximalAccessRights;
+	__le32 GuestMaximalAccessRights;
+	__u16 ByteCount;        /* bct = 0 */
+} __attribute__((packed)) OPEN_RSP_EXT;
+
+
+/* format of legacy open request */
+typedef struct smb_com_openx_req {
+	struct smb_hdr	hdr;	/* wct = 15 */
+	__u8 AndXCommand;
+	__u8 AndXReserved;
+	__le16 AndXOffset;
+	__le16 OpenFlags;
+	__le16 Mode;
+	__le16 Sattr; /* search attributes */
+	__le16 FileAttributes;  /* dos attrs */
+	__le32 CreateTime; /* os2 format */
+	__le16 OpenFunction;
+	__le32 EndOfFile;
+	__le32 Timeout;
+	__le32 Reserved;
+	__le16  ByteCount;  /* file name follows */
+	char   fileName[];
+} __attribute__((packed)) OPENX_REQ;
+
+typedef struct smb_com_openx_rsp {
+	struct smb_hdr	hdr;	/* wct = 15 */
+	__u8 AndXCommand;
+	__u8 AndXReserved;
+	__le16 AndXOffset;
+	__u16  Fid;
+	__le16 FileAttributes;
+	__le32 LastWriteTime; /* os2 format */
+	__le32 EndOfFile;
+	__le16 Access;
+	__le16 FileType;
+	__le16 IPCState;
+	__le16 Action;
+	__u32  FileId;
+	__u16  Reserved;
+	__u16  ByteCount;
+} __attribute__((packed)) OPENX_RSP;
+
+/* For encoding of POSIX Open Request - see trans2 function 0x209 data struct */
+
+/* Legacy write request for older servers */
+typedef struct smb_com_writex_req {
+	struct smb_hdr hdr;     /* wct = 12 */
+	__u8 AndXCommand;
+	__u8 AndXReserved;
+	__le16 AndXOffset;
+	__u16 Fid;
+	__le32 OffsetLow;
+	__u32 Reserved; /* Timeout */
+	__le16 WriteMode; /* 1 = write through */
+	__le16 Remaining;
+	__le16 Reserved2;
+	__le16 DataLengthLow;
+	__le16 DataOffset;
+	__le16 ByteCount;
+	__u8 Pad;		/* BB check for whether padded to DWORD
+				   boundary and optimum performance here */
+	char Data[];
+} __attribute__((packed)) WRITEX_REQ;
+
+typedef struct smb_com_write_req {
+	struct smb_hdr hdr;	/* wct = 14 */
+	__u8 AndXCommand;
+	__u8 AndXReserved;
+	__le16 AndXOffset;
+	__u16 Fid;
+	__le32 OffsetLow;
+	__u32 Reserved;
+	__le16 WriteMode;
+	__le16 Remaining;
+	__le16 DataLengthHigh;
+	__le16 DataLengthLow;
+	__le16 DataOffset;
+	__le32 OffsetHigh;
+	__le16 ByteCount;
+	__u8 Pad;		/* BB check for whether padded to DWORD
+				   boundary and optimum performance here */
+	char Data[];
+} __attribute__((packed)) WRITE_REQ;
+
+typedef struct smb_com_write_rsp {
+	struct smb_hdr hdr;	/* wct = 6 */
+	__u8 AndXCommand;
+	__u8 AndXReserved;
+	__le16 AndXOffset;
+	__le16 Count;
+	__le16 Remaining;
+	__le16 CountHigh;
+	__u16  Reserved;
+	__u16 ByteCount;
+} __attribute__((packed)) WRITE_RSP;
+
+/* legacy read request for older servers */
+typedef struct smb_com_readx_req {
+	struct smb_hdr hdr;	/* wct = 10 */
+	__u8 AndXCommand;
+	__u8 AndXReserved;
+	__le16 AndXOffset;
+	__u16 Fid;
+	__le32 OffsetLow;
+	__le16 MaxCount;
+	__le16 MinCount;	/* obsolete */
+	__le32 Reserved;
+	__le16 Remaining;
+	__le16 ByteCount;
+} __attribute__((packed)) READX_REQ;
+
+typedef struct smb_com_read_req {
+	struct smb_hdr hdr;	/* wct = 12 */
+	__u8 AndXCommand;
+	__u8 AndXReserved;
+	__le16 AndXOffset;
+	__u16 Fid;
+	__le32 OffsetLow;
+	__le16 MaxCount;
+	__le16 MinCount;		/* obsolete */
+	__le32 MaxCountHigh;
+	__le16 Remaining;
+	__le32 OffsetHigh;
+	__le16 ByteCount;
+} __attribute__((packed)) READ_REQ;
+
+typedef struct smb_com_read_rsp {
+	struct smb_hdr hdr;	/* wct = 12 */
+	__u8 AndXCommand;
+	__u8 AndXReserved;
+	__le16 AndXOffset;
+	__le16 Remaining;
+	__le16 DataCompactionMode;
+	__le16 Reserved;
+	__le16 DataLength;
+	__le16 DataOffset;
+	__le16 DataLengthHigh;
+	__u64 Reserved2;
+	__u16 ByteCount;
+	/* read response data immediately follows */
+} __attribute__((packed)) READ_RSP;
+
+typedef struct locking_andx_range {
+	__le16 Pid;
+	__le16 Pad;
+	__le32 OffsetHigh;
+	__le32 OffsetLow;
+	__le32 LengthHigh;
+	__le32 LengthLow;
+} __attribute__((packed)) LOCKING_ANDX_RANGE;
+
+#define LOCKING_ANDX_SHARED_LOCK     0x01
+#define LOCKING_ANDX_OPLOCK_RELEASE  0x02
+#define LOCKING_ANDX_CHANGE_LOCKTYPE 0x04
+#define LOCKING_ANDX_CANCEL_LOCK     0x08
+#define LOCKING_ANDX_LARGE_FILES     0x10	/* always on for us */
+
+typedef struct smb_com_lock_req {
+	struct smb_hdr hdr;	/* wct = 8 */
+	__u8 AndXCommand;
+	__u8 AndXReserved;
+	__le16 AndXOffset;
+	__u16 Fid;
+	__u8 LockType;
+	__u8 OplockLevel;
+	__le32 Timeout;
+	__le16 NumberOfUnlocks;
+	__le16 NumberOfLocks;
+	__le16 ByteCount;
+	LOCKING_ANDX_RANGE Locks[];
+} __attribute__((packed)) LOCK_REQ;
+
+/* lock type */
+#define CIFS_RDLCK	0
+#define CIFS_WRLCK	1
+#define CIFS_UNLCK      2
+typedef struct cifs_posix_lock {
+	__le16  lock_type;  /* 0 = Read, 1 = Write, 2 = Unlock */
+	__le16  lock_flags; /* 1 = Wait (only valid for setlock) */
+	__le32  pid;
+	__le64	start;
+	__le64	length;
+	/* BB what about additional owner info to identify network client */
+} __attribute__((packed)) CIFS_POSIX_LOCK;
+
+typedef struct smb_com_lock_rsp {
+	struct smb_hdr hdr;	/* wct = 2 */
+	__u8 AndXCommand;
+	__u8 AndXReserved;
+	__le16 AndXOffset;
+	__u16 ByteCount;
+} __attribute__((packed)) LOCK_RSP;
+
+typedef struct smb_com_rename_req {
+	struct smb_hdr hdr;	/* wct = 1 */
+	__le16 SearchAttributes;	/* target file attributes */
+	__le16 ByteCount;
+	__u8 BufferFormat;	/* 4 = ASCII or Unicode */
+	unsigned char OldFileName[];
+	/* followed by __u8 BufferFormat2 */
+	/* followed by NewFileName */
+} __attribute__((packed)) RENAME_REQ;
+
+	/* copy request flags */
+#define COPY_MUST_BE_FILE      0x0001
+#define COPY_MUST_BE_DIR       0x0002
+#define COPY_TARGET_MODE_ASCII 0x0004 /* if not set, binary */
+#define COPY_SOURCE_MODE_ASCII 0x0008 /* if not set, binary */
+#define COPY_VERIFY_WRITES     0x0010
+#define COPY_TREE              0x0020
+
+typedef struct smb_com_copy_req {
+	struct smb_hdr hdr;	/* wct = 3 */
+	__u16 Tid2;
+	__le16 OpenFunction;
+	__le16 Flags;
+	__le16 ByteCount;
+	__u8 BufferFormat;	/* 4 = ASCII or Unicode */
+	unsigned char OldFileName[];
+	/* followed by __u8 BufferFormat2 */
+	/* followed by NewFileName string */
+} __attribute__((packed)) COPY_REQ;
+
+typedef struct smb_com_copy_rsp {
+	struct smb_hdr hdr;     /* wct = 1 */
+	__le16 CopyCount;    /* number of files copied */
+	__u16 ByteCount;    /* may be zero */
+	__u8 BufferFormat;  /* 0x04 - only present if errored file follows */
+	unsigned char ErrorFileName[]; /* only present if error in copy */
+} __attribute__((packed)) COPY_RSP;
+
+#define CREATE_HARD_LINK		0x103
+#define MOVEFILE_COPY_ALLOWED		0x0002
+#define MOVEFILE_REPLACE_EXISTING	0x0001
+
+typedef struct smb_com_nt_rename_req {	/* A5 - also used for create hardlink */
+	struct smb_hdr hdr;	/* wct = 4 */
+	__le16 SearchAttributes;	/* target file attributes */
+	__le16 Flags;		/* spec says Information Level */
+	__le32 ClusterCount;
+	__le16 ByteCount;
+	__u8 BufferFormat;	/* 4 = ASCII or Unicode */
+	unsigned char OldFileName[];
+	/* followed by __u8 BufferFormat2 */
+	/* followed by NewFileName */
+} __attribute__((packed)) NT_RENAME_REQ;
+
+typedef struct smb_com_rename_rsp {
+	struct smb_hdr hdr;	/* wct = 0 */
+	__u16 ByteCount;	/* bct = 0 */
+} __attribute__((packed)) RENAME_RSP;
+
+typedef struct smb_com_delete_file_req {
+	struct smb_hdr hdr;	/* wct = 1 */
+	__le16 SearchAttributes;
+	__le16 ByteCount;
+	__u8 BufferFormat;	/* 4 = ASCII */
+	unsigned char fileName[];
+} __attribute__((packed)) DELETE_FILE_REQ;
+
+typedef struct smb_com_delete_file_rsp {
+	struct smb_hdr hdr;	/* wct = 0 */
+	__u16 ByteCount;	/* bct = 0 */
+} __attribute__((packed)) DELETE_FILE_RSP;
+
+typedef struct smb_com_delete_directory_req {
+	struct smb_hdr hdr;	/* wct = 0 */
+	__le16 ByteCount;
+	__u8 BufferFormat;	/* 4 = ASCII */
+	unsigned char DirName[];
+} __attribute__((packed)) DELETE_DIRECTORY_REQ;
+
+typedef struct smb_com_delete_directory_rsp {
+	struct smb_hdr hdr;	/* wct = 0 */
+	__u16 ByteCount;	/* bct = 0 */
+} __attribute__((packed)) DELETE_DIRECTORY_RSP;
+
+typedef struct smb_com_create_directory_req {
+	struct smb_hdr hdr;	/* wct = 0 */
+	__le16 ByteCount;
+	__u8 BufferFormat;	/* 4 = ASCII */
+	unsigned char DirName[];
+} __attribute__((packed)) CREATE_DIRECTORY_REQ;
+
+typedef struct smb_com_create_directory_rsp {
+	struct smb_hdr hdr;	/* wct = 0 */
+	__u16 ByteCount;	/* bct = 0 */
+} __attribute__((packed)) CREATE_DIRECTORY_RSP;
+
+typedef struct smb_com_query_information_req {
+	struct smb_hdr hdr;     /* wct = 0 */
+	__le16 ByteCount;	/* 1 + namelen + 1 */
+	__u8 BufferFormat;      /* 4 = ASCII */
+	unsigned char FileName[];
+} __attribute__((packed)) QUERY_INFORMATION_REQ;
+
+typedef struct smb_com_query_information_rsp {
+	struct smb_hdr hdr;     /* wct = 10 */
+	__le16 attr;
+	__le32  last_write_time;
+	__le32 size;
+	__u16  reserved[5];
+	__le16 ByteCount;	/* bcc = 0 */
+} __attribute__((packed)) QUERY_INFORMATION_RSP;
+
+typedef struct smb_com_setattr_req {
+	struct smb_hdr hdr; /* wct = 8 */
+	__le16 attr;
+	__le16 time_low;
+	__le16 time_high;
+	__le16 reserved[5]; /* must be zero */
+	__u16  ByteCount;
+	__u8   BufferFormat; /* 4 = ASCII */
+	unsigned char fileName[];
+} __attribute__((packed)) SETATTR_REQ;
+
+typedef struct smb_com_setattr_rsp {
+	struct smb_hdr hdr;     /* wct = 0 */
+	__u16 ByteCount;        /* bct = 0 */
+} __attribute__((packed)) SETATTR_RSP;
+
+/* empty wct response to setattr */
+
+/*******************************************************/
+/* NT Transact structure definitions follow            */
+/* Currently only ioctl, acl (get security descriptor) */
+/* and notify are implemented                          */
+/*******************************************************/
+typedef struct smb_com_ntransact_req {
+	struct smb_hdr hdr; /* wct >= 19 */
+	__u8 MaxSetupCount;
+	__u16 Reserved;
+	__le32 TotalParameterCount;
+	__le32 TotalDataCount;
+	__le32 MaxParameterCount;
+	__le32 MaxDataCount;
+	__le32 ParameterCount;
+	__le32 ParameterOffset;
+	__le32 DataCount;
+	__le32 DataOffset;
+	__u8 SetupCount; /* four setup words follow subcommand */
+	/* SNIA spec incorrectly included spurious pad here */
+	__le16 SubCommand; /* 2 = IOCTL/FSCTL */
+	/* SetupCount words follow then */
+	__le16 ByteCount;
+	__u8 Pad[3];
+	__u8 Parms[];
+} __attribute__((packed)) NTRANSACT_REQ;
+
+typedef struct smb_com_ntransact_rsp {
+	struct smb_hdr hdr;     /* wct = 18 */
+	__u8 Reserved[3];
+	__le32 TotalParameterCount;
+	__le32 TotalDataCount;
+	__le32 ParameterCount;
+	__le32 ParameterOffset;
+	__le32 ParameterDisplacement;
+	__le32 DataCount;
+	__le32 DataOffset;
+	__le32 DataDisplacement;
+	__u8 SetupCount;   /* 0 */
+	__u16 ByteCount;
+	/* __u8 Pad[3]; */
+	/* parms and data follow */
+} __attribute__((packed)) NTRANSACT_RSP;
+
+/* See MS-SMB 2.2.7.2.1.1 */
+struct srv_copychunk {
+	__le64 SourceOffset;
+	__le64 DestinationOffset;
+	__le32 CopyLength;
+	__u32  Reserved;
+} __packed;
+
+typedef struct smb_com_transaction_ioctl_req {
+	struct smb_hdr hdr;	/* wct = 23 */
+	__u8 MaxSetupCount;
+	__u16 Reserved;
+	__le32 TotalParameterCount;
+	__le32 TotalDataCount;
+	__le32 MaxParameterCount;
+	__le32 MaxDataCount;
+	__le32 ParameterCount;
+	__le32 ParameterOffset;
+	__le32 DataCount;
+	__le32 DataOffset;
+	__u8 SetupCount; /* four setup words follow subcommand */
+	/* SNIA spec incorrectly included spurious pad here */
+	__le16 SubCommand; /* 2 = IOCTL/FSCTL */
+	__le32 FunctionCode;
+	__u16 Fid;
+	__u8 IsFsctl;  /* 1 = File System Control 0 = device control (IOCTL) */
+	__u8 IsRootFlag; /* 1 = apply command to root of share (must be DFS) */
+	__le16 ByteCount;
+	__u8 Pad[3];
+	__u8 Data[];
+} __attribute__((packed)) TRANSACT_IOCTL_REQ;
+
+typedef struct smb_com_transaction_compr_ioctl_req {
+	struct smb_hdr hdr;	/* wct = 23 */
+	__u8 MaxSetupCount;
+	__u16 Reserved;
+	__le32 TotalParameterCount;
+	__le32 TotalDataCount;
+	__le32 MaxParameterCount;
+	__le32 MaxDataCount;
+	__le32 ParameterCount;
+	__le32 ParameterOffset;
+	__le32 DataCount;
+	__le32 DataOffset;
+	__u8 SetupCount; /* four setup words follow subcommand */
+	/* SNIA spec incorrectly included spurious pad here */
+	__le16 SubCommand; /* 2 = IOCTL/FSCTL */
+	__le32 FunctionCode;
+	__u16 Fid;
+	__u8 IsFsctl;  /* 1 = File System Control 0 = device control (IOCTL) */
+	__u8 IsRootFlag; /* 1 = apply command to root of share (must be DFS) */
+	__le16 ByteCount;
+	__u8 Pad[3];
+	__le16 compression_state;  /* See below for valid flags */
+} __attribute__((packed)) TRANSACT_COMPR_IOCTL_REQ;
+
+/* compression state flags */
+#define COMPRESSION_FORMAT_NONE		0x0000
+#define COMPRESSION_FORMAT_DEFAULT	0x0001
+#define COMPRESSION_FORMAT_LZNT1	0x0002
+
+typedef struct smb_com_transaction_ioctl_rsp {
+	struct smb_hdr hdr;	/* wct = 19 */
+	__u8 Reserved[3];
+	__le32 TotalParameterCount;
+	__le32 TotalDataCount;
+	__le32 ParameterCount;
+	__le32 ParameterOffset;
+	__le32 ParameterDisplacement;
+	__le32 DataCount;
+	__le32 DataOffset;
+	__le32 DataDisplacement;
+	__u8 SetupCount;	/* 1 */
+	__le16 ReturnedDataLen;
+	__le16 ByteCount;
+} __attribute__((packed)) TRANSACT_IOCTL_RSP;
+
+#define CIFS_ACL_OWNER 1
+#define CIFS_ACL_GROUP 2
+#define CIFS_ACL_DACL  4
+#define CIFS_ACL_SACL  8
+
+typedef struct smb_com_transaction_qsec_req {
+	struct smb_hdr hdr;     /* wct = 19 */
+	__u8 MaxSetupCount;
+	__u16 Reserved;
+	__le32 TotalParameterCount;
+	__le32 TotalDataCount;
+	__le32 MaxParameterCount;
+	__le32 MaxDataCount;
+	__le32 ParameterCount;
+	__le32 ParameterOffset;
+	__le32 DataCount;
+	__le32 DataOffset;
+	__u8 SetupCount; /* no setup words follow subcommand */
+	/* SNIA spec incorrectly included spurious pad here */
+	__le16 SubCommand; /* 6 = QUERY_SECURITY_DESC */
+	__le16 ByteCount; /* bcc = 3 + 8 */
+	__u8 Pad[3];
+	__u16 Fid;
+	__u16 Reserved2;
+	__le32 AclFlags;
+} __attribute__((packed)) QUERY_SEC_DESC_REQ;
+
+
+typedef struct smb_com_transaction_ssec_req {
+	struct smb_hdr hdr;     /* wct = 19 */
+	__u8 MaxSetupCount;
+	__u16 Reserved;
+	__le32 TotalParameterCount;
+	__le32 TotalDataCount;
+	__le32 MaxParameterCount;
+	__le32 MaxDataCount;
+	__le32 ParameterCount;
+	__le32 ParameterOffset;
+	__le32 DataCount;
+	__le32 DataOffset;
+	__u8 SetupCount; /* no setup words follow subcommand */
+	/* SNIA spec incorrectly included spurious pad here */
+	__le16 SubCommand; /* 3 = SET_SECURITY_DESC */
+	__le16 ByteCount; /* bcc = 3 + 8 */
+	__u8 Pad[3];
+	__u16 Fid;
+	__u16 Reserved2;
+	__le32 AclFlags;
+} __attribute__((packed)) SET_SEC_DESC_REQ;
+
+typedef struct smb_com_transaction_change_notify_req {
+	struct smb_hdr hdr;     /* wct = 23 */
+	__u8 MaxSetupCount;
+	__u16 Reserved;
+	__le32 TotalParameterCount;
+	__le32 TotalDataCount;
+	__le32 MaxParameterCount;
+	__le32 MaxDataCount;
+	__le32 ParameterCount;
+	__le32 ParameterOffset;
+	__le32 DataCount;
+	__le32 DataOffset;
+	__u8 SetupCount; /* four setup words follow subcommand */
+	/* SNIA spec incorrectly included spurious pad here */
+	__le16 SubCommand;/* 4 = Change Notify */
+	__le32 CompletionFilter;  /* operation to monitor */
+	__u16 Fid;
+	__u8 WatchTree;  /* 1 = Monitor subdirectories */
+	__u8 Reserved2;
+	__le16 ByteCount;
+/*	__u8 Pad[3];*/
+/*	__u8 Data[];*/
+} __attribute__((packed)) TRANSACT_CHANGE_NOTIFY_REQ;
+
+/* BB eventually change to use generic ntransact rsp struct
+      and validation routine */
+typedef struct smb_com_transaction_change_notify_rsp {
+	struct smb_hdr hdr;	/* wct = 18 */
+	__u8 Reserved[3];
+	__le32 TotalParameterCount;
+	__le32 TotalDataCount;
+	__le32 ParameterCount;
+	__le32 ParameterOffset;
+	__le32 ParameterDisplacement;
+	__le32 DataCount;
+	__le32 DataOffset;
+	__le32 DataDisplacement;
+	__u8 SetupCount;   /* 0 */
+	__u16 ByteCount;
+	/* __u8 Pad[3]; */
+} __attribute__((packed)) TRANSACT_CHANGE_NOTIFY_RSP;
+/* Completion Filter flags for Notify */
+#define FILE_NOTIFY_CHANGE_FILE_NAME    0x00000001
+#define FILE_NOTIFY_CHANGE_DIR_NAME     0x00000002
+#define FILE_NOTIFY_CHANGE_NAME         0x00000003
+#define FILE_NOTIFY_CHANGE_ATTRIBUTES   0x00000004
+#define FILE_NOTIFY_CHANGE_SIZE         0x00000008
+#define FILE_NOTIFY_CHANGE_LAST_WRITE   0x00000010
+#define FILE_NOTIFY_CHANGE_LAST_ACCESS  0x00000020
+#define FILE_NOTIFY_CHANGE_CREATION     0x00000040
+#define FILE_NOTIFY_CHANGE_EA           0x00000080
+#define FILE_NOTIFY_CHANGE_SECURITY     0x00000100
+#define FILE_NOTIFY_CHANGE_STREAM_NAME  0x00000200
+#define FILE_NOTIFY_CHANGE_STREAM_SIZE  0x00000400
+#define FILE_NOTIFY_CHANGE_STREAM_WRITE 0x00000800
+
+#define FILE_ACTION_ADDED		0x00000001
+#define FILE_ACTION_REMOVED		0x00000002
+#define FILE_ACTION_MODIFIED		0x00000003
+#define FILE_ACTION_RENAMED_OLD_NAME	0x00000004
+#define FILE_ACTION_RENAMED_NEW_NAME	0x00000005
+#define FILE_ACTION_ADDED_STREAM	0x00000006
+#define FILE_ACTION_REMOVED_STREAM	0x00000007
+#define FILE_ACTION_MODIFIED_STREAM	0x00000008
+
+/* response contains array of the following structures */
+struct file_notify_information {
+	__le32 NextEntryOffset;
+	__le32 Action;
+	__le32 FileNameLength;
+	__u8  FileName[];
+} __attribute__((packed));
+
+/* For IO_REPARSE_TAG_SYMLINK */
+struct reparse_symlink_data {
+	__le32	ReparseTag;
+	__le16	ReparseDataLength;
+	__u16	Reserved;
+	__le16	SubstituteNameOffset;
+	__le16	SubstituteNameLength;
+	__le16	PrintNameOffset;
+	__le16	PrintNameLength;
+	__le32	Flags;
+	char	PathBuffer[];
+} __attribute__((packed));
+
+/* Flag above */
+#define SYMLINK_FLAG_RELATIVE 0x00000001
+
+/* For IO_REPARSE_TAG_NFS */
+#define NFS_SPECFILE_LNK	0x00000000014B4E4C
+#define NFS_SPECFILE_CHR	0x0000000000524843
+#define NFS_SPECFILE_BLK	0x00000000004B4C42
+#define NFS_SPECFILE_FIFO	0x000000004F464946
+#define NFS_SPECFILE_SOCK	0x000000004B434F53
+struct reparse_posix_data {
+	__le32	ReparseTag;
+	__le16	ReparseDataLength;
+	__u16	Reserved;
+	__le64	InodeType; /* LNK, FIFO, CHR etc. */
+	__u8	DataBuffer[];
+} __attribute__((packed));
+
+struct cifs_quota_data {
+	__u32	rsrvd1;  /* 0 */
+	__u32	sid_size;
+	__u64	rsrvd2;  /* 0 */
+	__u64	space_used;
+	__u64	soft_limit;
+	__u64	hard_limit;
+	char	sid[];  /* variable size? */
+} __attribute__((packed));
+
+/* quota sub commands */
+#define QUOTA_LIST_CONTINUE	    0
+#define QUOTA_LIST_START	0x100
+#define QUOTA_FOR_SID		0x101
+
+struct trans2_req {
+	/* struct smb_hdr hdr precedes. Set wct = 14+ */
+	__le16 TotalParameterCount;
+	__le16 TotalDataCount;
+	__le16 MaxParameterCount;
+	__le16 MaxDataCount;
+	__u8 MaxSetupCount;
+	__u8 Reserved;
+	__le16 Flags;
+	__le32 Timeout;
+	__u16 Reserved2;
+	__le16 ParameterCount;
+	__le16 ParameterOffset;
+	__le16 DataCount;
+	__le16 DataOffset;
+	__u8 SetupCount;
+	__u8 Reserved3;
+	__le16 SubCommand; /* 1st setup word - SetupCount words follow */
+	__le16 ByteCount;
+} __attribute__((packed));
+
+struct smb_t2_req {
+	struct smb_hdr hdr;
+	struct trans2_req t2_req;
+} __attribute__((packed));
+
+struct trans2_resp {
+	/* struct smb_hdr hdr precedes. Note wct = 10 + setup count */
+	__le16 TotalParameterCount;
+	__le16 TotalDataCount;
+	__u16 Reserved;
+	__le16 ParameterCount;
+	__le16 ParameterOffset;
+	__le16 ParameterDisplacement;
+	__le16 DataCount;
+	__le16 DataOffset;
+	__le16 DataDisplacement;
+	__u8 SetupCount;
+	__u8 Reserved1;
+	/* SetupWords[SetupCount];
+	__u16 ByteCount;
+	__u16 Reserved2;*/
+	/* data area follows */
+} __attribute__((packed));
+
+struct smb_t2_rsp {
+	struct smb_hdr hdr;
+	struct trans2_resp t2_rsp;
+} __attribute__((packed));
+
+/* PathInfo/FileInfo infolevels */
+#define SMB_INFO_STANDARD                   1
+#define SMB_SET_FILE_EA                     2
+#define SMB_QUERY_FILE_EA_SIZE              2
+#define SMB_INFO_QUERY_EAS_FROM_LIST        3
+#define SMB_INFO_QUERY_ALL_EAS              4
+#define SMB_INFO_IS_NAME_VALID              6
+#define SMB_QUERY_FILE_BASIC_INFO       0x101
+#define SMB_QUERY_FILE_STANDARD_INFO    0x102
+#define SMB_QUERY_FILE_EA_INFO          0x103
+#define SMB_QUERY_FILE_NAME_INFO        0x104
+#define SMB_QUERY_FILE_ALLOCATION_INFO  0x105
+#define SMB_QUERY_FILE_END_OF_FILEINFO  0x106
+#define SMB_QUERY_FILE_ALL_INFO         0x107
+#define SMB_QUERY_ALT_NAME_INFO         0x108
+#define SMB_QUERY_FILE_STREAM_INFO      0x109
+#define SMB_QUERY_FILE_COMPRESSION_INFO 0x10B
+#define SMB_QUERY_FILE_UNIX_BASIC       0x200
+#define SMB_QUERY_FILE_UNIX_LINK        0x201
+#define SMB_QUERY_POSIX_ACL             0x204
+#define SMB_QUERY_XATTR                 0x205  /* e.g. system EA name space */
+#define SMB_QUERY_ATTR_FLAGS            0x206  /* append,immutable etc. */
+#define SMB_QUERY_POSIX_PERMISSION      0x207
+#define SMB_QUERY_POSIX_LOCK            0x208
+/* #define SMB_POSIX_OPEN               0x209 */
+/* #define SMB_POSIX_UNLINK             0x20a */
+#define SMB_QUERY_FILE__UNIX_INFO2      0x20b
+#define SMB_QUERY_FILE_INTERNAL_INFO    0x3ee
+#define SMB_QUERY_FILE_ACCESS_INFO      0x3f0
+#define SMB_QUERY_FILE_NAME_INFO2       0x3f1 /* 0x30 bytes */
+#define SMB_QUERY_FILE_POSITION_INFO    0x3f6
+#define SMB_QUERY_FILE_MODE_INFO        0x3f8
+#define SMB_QUERY_FILE_ALGN_INFO        0x3f9
+
+
+#define SMB_SET_FILE_BASIC_INFO	        0x101
+#define SMB_SET_FILE_DISPOSITION_INFO   0x102
+#define SMB_SET_FILE_ALLOCATION_INFO    0x103
+#define SMB_SET_FILE_END_OF_FILE_INFO   0x104
+#define SMB_SET_FILE_UNIX_BASIC         0x200
+#define SMB_SET_FILE_UNIX_LINK          0x201
+#define SMB_SET_FILE_UNIX_HLINK         0x203
+#define SMB_SET_POSIX_ACL               0x204
+#define SMB_SET_XATTR                   0x205
+#define SMB_SET_ATTR_FLAGS              0x206  /* append, immutable etc. */
+#define SMB_SET_POSIX_LOCK              0x208
+#define SMB_POSIX_OPEN                  0x209
+#define SMB_POSIX_UNLINK                0x20a
+#define SMB_SET_FILE_UNIX_INFO2         0x20b
+#define SMB_SET_FILE_BASIC_INFO2        0x3ec
+#define SMB_SET_FILE_RENAME_INFORMATION 0x3f2 /* BB check if qpathinfo too */
+#define SMB_FILE_ALL_INFO2              0x3fa
+#define SMB_SET_FILE_ALLOCATION_INFO2   0x3fb
+#define SMB_SET_FILE_END_OF_FILE_INFO2  0x3fc
+#define SMB_FILE_MOVE_CLUSTER_INFO      0x407
+#define SMB_FILE_QUOTA_INFO             0x408
+#define SMB_FILE_REPARSEPOINT_INFO      0x409
+#define SMB_FILE_MAXIMUM_INFO           0x40d
+
+/* Find File infolevels */
+#define SMB_FIND_FILE_INFO_STANDARD       0x001
+#define SMB_FIND_FILE_QUERY_EA_SIZE       0x002
+#define SMB_FIND_FILE_QUERY_EAS_FROM_LIST 0x003
+#define SMB_FIND_FILE_DIRECTORY_INFO      0x101
+#define SMB_FIND_FILE_FULL_DIRECTORY_INFO 0x102
+#define SMB_FIND_FILE_NAMES_INFO          0x103
+#define SMB_FIND_FILE_BOTH_DIRECTORY_INFO 0x104
+#define SMB_FIND_FILE_ID_FULL_DIR_INFO    0x105
+#define SMB_FIND_FILE_ID_BOTH_DIR_INFO    0x106
+#define SMB_FIND_FILE_UNIX                0x202
+/* #define SMB_FIND_FILE_POSIX_INFO          0x064 */
+
+typedef struct smb_com_transaction2_qpi_req {
+	struct smb_hdr hdr;	/* wct = 14+ */
+	__le16 TotalParameterCount;
+	__le16 TotalDataCount;
+	__le16 MaxParameterCount;
+	__le16 MaxDataCount;
+	__u8 MaxSetupCount;
+	__u8 Reserved;
+	__le16 Flags;
+	__le32 Timeout;
+	__u16 Reserved2;
+	__le16 ParameterCount;
+	__le16 ParameterOffset;
+	__le16 DataCount;
+	__le16 DataOffset;
+	__u8 SetupCount;
+	__u8 Reserved3;
+	__le16 SubCommand;	/* one setup word */
+	__le16 ByteCount;
+	__u8 Pad;
+	__le16 InformationLevel;
+	__u32 Reserved4;
+	char FileName[];
+} __attribute__((packed)) TRANSACTION2_QPI_REQ;
+
+typedef struct smb_com_transaction2_qpi_rsp {
+	struct smb_hdr hdr;	/* wct = 10 + SetupCount */
+	struct trans2_resp t2;
+	__u16 ByteCount;
+	__u16 Reserved2; /* parameter word is present for infolevels > 100 */
+} __attribute__((packed)) TRANSACTION2_QPI_RSP;
+
+typedef struct smb_com_transaction2_spi_req {
+	struct smb_hdr hdr;	/* wct = 15 */
+	__le16 TotalParameterCount;
+	__le16 TotalDataCount;
+	__le16 MaxParameterCount;
+	__le16 MaxDataCount;
+	__u8 MaxSetupCount;
+	__u8 Reserved;
+	__le16 Flags;
+	__le32 Timeout;
+	__u16 Reserved2;
+	__le16 ParameterCount;
+	__le16 ParameterOffset;
+	__le16 DataCount;
+	__le16 DataOffset;
+	__u8 SetupCount;
+	__u8 Reserved3;
+	__le16 SubCommand;	/* one setup word */
+	__le16 ByteCount;
+	__u8 Pad;
+	__u16 Pad1;
+	__le16 InformationLevel;
+	__u32 Reserved4;
+	char FileName[];
+} __attribute__((packed)) TRANSACTION2_SPI_REQ;
+
+typedef struct smb_com_transaction2_spi_rsp {
+	struct smb_hdr hdr;	/* wct = 10 + SetupCount */
+	struct trans2_resp t2;
+	__u16 ByteCount;
+	__u16 Reserved2; /* parameter word is present for infolevels > 100 */
+} __attribute__((packed)) TRANSACTION2_SPI_RSP;
+
+struct set_file_rename {
+	__le32 overwrite;   /* 1 = overwrite dest */
+	__u32 root_fid;   /* zero */
+	__le32 target_name_len;
+	char  target_name[];  /* Must be unicode */
+} __attribute__((packed));
+
+struct smb_com_transaction2_sfi_req {
+	struct smb_hdr hdr;	/* wct = 15 */
+	__le16 TotalParameterCount;
+	__le16 TotalDataCount;
+	__le16 MaxParameterCount;
+	__le16 MaxDataCount;
+	__u8 MaxSetupCount;
+	__u8 Reserved;
+	__le16 Flags;
+	__le32 Timeout;
+	__u16 Reserved2;
+	__le16 ParameterCount;
+	__le16 ParameterOffset;
+	__le16 DataCount;
+	__le16 DataOffset;
+	__u8 SetupCount;
+	__u8 Reserved3;
+	__le16 SubCommand;	/* one setup word */
+	__le16 ByteCount;
+	__u8 Pad;
+	__u16 Pad1;
+	__u16 Fid;
+	__le16 InformationLevel;
+	__u16 Reserved4;
+	__u8  payload[];
+} __attribute__((packed));
+
+struct smb_com_transaction2_sfi_rsp {
+	struct smb_hdr hdr;	/* wct = 10 + SetupCount */
+	struct trans2_resp t2;
+	__u16 ByteCount;
+	__u16 Reserved2; /* parameter word reserved - present for infolevels > 100 */
+} __attribute__((packed));
+
+struct smb_t2_qfi_req {
+	struct	smb_hdr hdr;
+	struct	trans2_req t2;
+	__u8	Pad;
+	__u16	Fid;
+	__le16	InformationLevel;
+} __attribute__((packed));
+
+struct smb_t2_qfi_rsp {
+	struct smb_hdr hdr;     /* wct = 10 + SetupCount */
+	struct trans2_resp t2;
+	__u16 ByteCount;
+	__u16 Reserved2; /* parameter word reserved - present for infolevels > 100 */
+} __attribute__((packed));
+
+/*
+ * Flags on T2 FINDFIRST and FINDNEXT
+ */
+#define CIFS_SEARCH_CLOSE_ALWAYS  0x0001
+#define CIFS_SEARCH_CLOSE_AT_END  0x0002
+#define CIFS_SEARCH_RETURN_RESUME 0x0004
+#define CIFS_SEARCH_CONTINUE_FROM_LAST 0x0008
+#define CIFS_SEARCH_BACKUP_SEARCH 0x0010
+
+/*
+ * Size of the resume key on FINDFIRST and FINDNEXT calls
+ */
+#define CIFS_SMB_RESUME_KEY_SIZE 4
+
+typedef struct smb_com_transaction2_ffirst_req {
+	struct smb_hdr hdr;	/* wct = 15 */
+	__le16 TotalParameterCount;
+	__le16 TotalDataCount;
+	__le16 MaxParameterCount;
+	__le16 MaxDataCount;
+	__u8 MaxSetupCount;
+	__u8 Reserved;
+	__le16 Flags;
+	__le32 Timeout;
+	__u16 Reserved2;
+	__le16 ParameterCount;
+	__le16 ParameterOffset;
+	__le16 DataCount;
+	__le16 DataOffset;
+	__u8 SetupCount;	/* one */
+	__u8 Reserved3;
+	__le16 SubCommand;	/* TRANS2_FIND_FIRST */
+	__le16 ByteCount;
+	__u8 Pad;
+	__le16 SearchAttributes;
+	__le16 SearchCount;
+	__le16 SearchFlags;
+	__le16 InformationLevel;
+	__le32 SearchStorageType;
+	char FileName[];
+} __attribute__((packed)) TRANSACTION2_FFIRST_REQ;
+
+typedef struct smb_com_transaction2_ffirst_rsp {
+	struct smb_hdr hdr;	/* wct = 10 */
+	struct trans2_resp t2;
+	__u16 ByteCount;
+} __attribute__((packed)) TRANSACTION2_FFIRST_RSP;
+
+typedef struct smb_com_transaction2_ffirst_rsp_parms {
+	__u16 SearchHandle;
+	__le16 SearchCount;
+	__le16 EndofSearch;
+	__le16 EAErrorOffset;
+	__le16 LastNameOffset;
+} __attribute__((packed)) T2_FFIRST_RSP_PARMS;
+
+typedef struct smb_com_transaction2_fnext_req {
+	struct smb_hdr hdr;	/* wct = 15 */
+	__le16 TotalParameterCount;
+	__le16 TotalDataCount;
+	__le16 MaxParameterCount;
+	__le16 MaxDataCount;
+	__u8 MaxSetupCount;
+	__u8 Reserved;
+	__le16 Flags;
+	__le32 Timeout;
+	__u16 Reserved2;
+	__le16 ParameterCount;
+	__le16 ParameterOffset;
+	__le16 DataCount;
+	__le16 DataOffset;
+	__u8 SetupCount;	/* one */
+	__u8 Reserved3;
+	__le16 SubCommand;	/* TRANS2_FIND_NEXT */
+	__le16 ByteCount;
+	__u8 Pad;
+	__u16 SearchHandle;
+	__le16 SearchCount;
+	__le16 InformationLevel;
+	__u32 ResumeKey;
+	__le16 SearchFlags;
+	char ResumeFileName[];
+} __attribute__((packed)) TRANSACTION2_FNEXT_REQ;
+
+typedef struct smb_com_transaction2_fnext_rsp {
+	struct smb_hdr hdr;	/* wct = 10 */
+	struct trans2_resp t2;
+	__u16 ByteCount;
+} __attribute__((packed)) TRANSACTION2_FNEXT_RSP;
+
+typedef struct smb_com_transaction2_fnext_rsp_parms {
+	__le16 SearchCount;
+	__le16 EndofSearch;
+	__le16 EAErrorOffset;
+	__le16 LastNameOffset;
+} __attribute__((packed)) T2_FNEXT_RSP_PARMS;
+
+/* QFSInfo Levels */
+#define SMB_INFO_ALLOCATION         1
+#define SMB_INFO_VOLUME             2
+#define SMB_QUERY_FS_VOLUME_INFO    0x102
+#define SMB_QUERY_FS_SIZE_INFO      0x103
+#define SMB_QUERY_FS_DEVICE_INFO    0x104
+#define SMB_QUERY_FS_ATTRIBUTE_INFO 0x105
+#define SMB_QUERY_CIFS_UNIX_INFO    0x200
+#define SMB_QUERY_POSIX_FS_INFO     0x201
+#define SMB_QUERY_POSIX_WHO_AM_I    0x202
+#define SMB_REQUEST_TRANSPORT_ENCRYPTION 0x203
+#define SMB_QUERY_FS_PROXY          0x204 /* WAFS enabled. Returns structure
+					    FILE_SYSTEM__UNIX_INFO to tell
+					    whether new NTIOCTL available
+					    (0xACE) for WAN friendly SMB
+					    operations to be carried */
+#define SMB_QUERY_LABEL_INFO        0x3ea
+#define SMB_QUERY_FS_QUOTA_INFO     0x3ee
+#define SMB_QUERY_FS_FULL_SIZE_INFO 0x3ef
+#define SMB_QUERY_OBJECTID_INFO     0x3f0
+
+typedef struct smb_com_transaction2_qfsi_req {
+	struct smb_hdr hdr;	/* wct = 14+ */
+	__le16 TotalParameterCount;
+	__le16 TotalDataCount;
+	__le16 MaxParameterCount;
+	__le16 MaxDataCount;
+	__u8 MaxSetupCount;
+	__u8 Reserved;
+	__le16 Flags;
+	__le32 Timeout;
+	__u16 Reserved2;
+	__le16 ParameterCount;
+	__le16 ParameterOffset;
+	__le16 DataCount;
+	__le16 DataOffset;
+	__u8 SetupCount;
+	__u8 Reserved3;
+	__le16 SubCommand;	/* one setup word */
+	__le16 ByteCount;
+	__u8 Pad;
+	__le16 InformationLevel;
+} __attribute__((packed)) TRANSACTION2_QFSI_REQ;
+
+typedef struct smb_com_transaction_qfsi_rsp {
+	struct smb_hdr hdr;	/* wct = 10 + SetupCount */
+	struct trans2_resp t2;
+	__u16 ByteCount;
+	__u8 Pad;	/* may be three bytes? *//* followed by data area */
+} __attribute__((packed)) TRANSACTION2_QFSI_RSP;
+
+typedef struct whoami_rsp_data { /* Query level 0x202 */
+	__u32 flags; /* 0 = Authenticated user 1 = GUEST */
+	__u32 mask; /* which flags bits server understands ie 0x0001 */
+	__u64 unix_user_id;
+	__u64 unix_user_gid;
+	__u32 number_of_supplementary_gids; /* may be zero */
+	__u32 number_of_sids; /* may be zero */
+	__u32 length_of_sid_array; /* in bytes - may be zero */
+	__u32 pad; /* reserved - MBZ */
+	/* __u64 gid_array[0]; */  /* may be empty */
+	/* __u8 * psid_list */  /* may be empty */
+} __attribute__((packed)) WHOAMI_RSP_DATA;
+
+/* SETFSInfo Levels */
+#define SMB_SET_CIFS_UNIX_INFO    0x200
+/* level 0x203 is defined above in list of QFS info levels */
+/* #define SMB_REQUEST_TRANSPORT_ENCRYPTION 0x203 */
+
+/* Level 0x200 request structure follows */
+typedef struct smb_com_transaction2_setfsi_req {
+	struct smb_hdr hdr;	/* wct = 15 */
+	__le16 TotalParameterCount;
+	__le16 TotalDataCount;
+	__le16 MaxParameterCount;
+	__le16 MaxDataCount;
+	__u8 MaxSetupCount;
+	__u8 Reserved;
+	__le16 Flags;
+	__le32 Timeout;
+	__u16 Reserved2;
+	__le16 ParameterCount;	/* 4 */
+	__le16 ParameterOffset;
+	__le16 DataCount;	/* 12 */
+	__le16 DataOffset;
+	__u8 SetupCount;	/* one */
+	__u8 Reserved3;
+	__le16 SubCommand;	/* TRANS2_SET_FS_INFORMATION */
+	__le16 ByteCount;
+	__u8 Pad;
+	__u16 FileNum;		/* Parameters start. */
+	__le16 InformationLevel;/* Parameters end. */
+	__le16 ClientUnixMajor; /* Data start. */
+	__le16 ClientUnixMinor;
+	__le64 ClientUnixCap;   /* Data end */
+} __attribute__((packed)) TRANSACTION2_SETFSI_REQ;
+
+/* level 0x203 request structure follows */
+typedef struct smb_com_transaction2_setfs_enc_req {
+	struct smb_hdr hdr;	/* wct = 15 */
+	__le16 TotalParameterCount;
+	__le16 TotalDataCount;
+	__le16 MaxParameterCount;
+	__le16 MaxDataCount;
+	__u8 MaxSetupCount;
+	__u8 Reserved;
+	__le16 Flags;
+	__le32 Timeout;
+	__u16 Reserved2;
+	__le16 ParameterCount;	/* 4 */
+	__le16 ParameterOffset;
+	__le16 DataCount;	/* 12 */
+	__le16 DataOffset;
+	__u8 SetupCount;	/* one */
+	__u8 Reserved3;
+	__le16 SubCommand;	/* TRANS2_SET_FS_INFORMATION */
+	__le16 ByteCount;
+	__u8 Pad;
+	__u16  Reserved4;	/* Parameters start. */
+	__le16 InformationLevel;/* Parameters end. */
+	/* NTLMSSP Blob, Data start. */
+} __attribute__((packed)) TRANSACTION2_SETFSI_ENC_REQ;
+
+/* response for setfsinfo levels 0x200 and 0x203 */
+typedef struct smb_com_transaction2_setfsi_rsp {
+	struct smb_hdr hdr;	/* wct = 10 */
+	struct trans2_resp t2;
+	__u16 ByteCount;
+} __attribute__((packed)) TRANSACTION2_SETFSI_RSP;
+
+typedef struct smb_com_transaction2_get_dfs_refer_req {
+	struct smb_hdr hdr;	/* wct = 15 */
+	__le16 TotalParameterCount;
+	__le16 TotalDataCount;
+	__le16 MaxParameterCount;
+	__le16 MaxDataCount;
+	__u8 MaxSetupCount;
+	__u8 Reserved;
+	__le16 Flags;
+	__le32 Timeout;
+	__u16 Reserved2;
+	__le16 ParameterCount;
+	__le16 ParameterOffset;
+	__le16 DataCount;
+	__le16 DataOffset;
+	__u8 SetupCount;
+	__u8 Reserved3;
+	__le16 SubCommand;	/* one setup word */
+	__le16 ByteCount;
+	__u8 Pad[3];		/* Win2K has sent 0x0F01 (max response length
+				   perhaps?) followed by one byte pad - doesn't
+				   seem to matter though */
+	__le16 MaxReferralLevel;
+	char RequestFileName[];
+} __attribute__((packed)) TRANSACTION2_GET_DFS_REFER_REQ;
+
+#define DFS_VERSION cpu_to_le16(0x0003)
+
+/* DFS server target type */
+#define DFS_TYPE_LINK 0x0000  /* also for sysvol targets */
+#define DFS_TYPE_ROOT 0x0001
+
+/* Referral Entry Flags */
+#define DFS_NAME_LIST_REF 0x0200 /* set for domain or DC referral responses */
+#define DFS_TARGET_SET_BOUNDARY 0x0400 /* only valid with version 4 dfs req */
+
+typedef struct dfs_referral_level_3 { /* version 4 is same, + one flag bit */
+	__le16 VersionNumber;  /* must be 3 or 4 */
+	__le16 Size;
+	__le16 ServerType; /* 0x0001 = root targets; 0x0000 = link targets */
+	__le16 ReferralEntryFlags;
+	__le32 TimeToLive;
+	__le16 DfsPathOffset;
+	__le16 DfsAlternatePathOffset;
+	__le16 NetworkAddressOffset; /* offset of the link target */
+	__u8   ServiceSiteGuid[16];  /* MBZ, ignored */
+} __attribute__((packed)) REFERRAL3;
+
+struct get_dfs_referral_rsp {
+	__le16 PathConsumed;
+	__le16 NumberOfReferrals;
+	__le32 DFSFlags;
+	REFERRAL3 referrals[];	/* array of level 3 dfs_referral structures */
+	/* followed by the strings pointed to by the referral structures */
+} __packed;
+
+typedef struct smb_com_transaction_get_dfs_refer_rsp {
+	struct smb_hdr hdr;	/* wct = 10 */
+	struct trans2_resp t2;
+	__u16 ByteCount;
+	__u8 Pad;
+	struct get_dfs_referral_rsp dfs_data;
+} __packed TRANSACTION2_GET_DFS_REFER_RSP;
+
+/* DFS Flags */
+#define DFSREF_REFERRAL_SERVER  0x00000001 /* all targets are DFS roots */
+#define DFSREF_STORAGE_SERVER   0x00000002 /* no further ref requests needed */
+#define DFSREF_TARGET_FAILBACK  0x00000004 /* only for DFS referral version 4 */
+
+/*
+ ************************************************************************
+ * All structs for everything above the SMB PDUs themselves
+ * (such as the T2 level specific data) go here
+ ************************************************************************
+ */
+
+/*
+ * Information on a server
+ */
+
+struct serverInfo {
+	char name[16];
+	unsigned char versionMajor;
+	unsigned char versionMinor;
+	unsigned long type;
+	unsigned int commentOffset;
+} __attribute__((packed));
+
+/*
+ * The following structure is the format of the data returned on a NetShareEnum
+ * with level "90" (x5A)
+ */
+
+struct shareInfo {
+	char shareName[13];
+	char pad;
+	unsigned short type;
+	unsigned int commentOffset;
+} __attribute__((packed));
+
+struct aliasInfo {
+	char aliasName[9];
+	char pad;
+	unsigned int commentOffset;
+	unsigned char type[2];
+} __attribute__((packed));
+
+struct aliasInfo92 {
+	int aliasNameOffset;
+	int serverNameOffset;
+	int shareNameOffset;
+} __attribute__((packed));
+
+typedef struct {
+	__le64 TotalAllocationUnits;
+	__le64 FreeAllocationUnits;
+	__le32 SectorsPerAllocationUnit;
+	__le32 BytesPerSector;
+} __attribute__((packed)) FILE_SYSTEM_INFO;	/* size info, level 0x103 */
+
+typedef struct {
+	__le32 fsid;
+	__le32 SectorsPerAllocationUnit;
+	__le32 TotalAllocationUnits;
+	__le32 FreeAllocationUnits;
+	__le16  BytesPerSector;
+} __attribute__((packed)) FILE_SYSTEM_ALLOC_INFO;
+
+typedef struct {
+	__le16 MajorVersionNumber;
+	__le16 MinorVersionNumber;
+	__le64 Capability;
+} __attribute__((packed)) FILE_SYSTEM_UNIX_INFO; /* Unix extension level 0x200*/
+
+/* Version numbers for CIFS UNIX major and minor. */
+#define CIFS_UNIX_MAJOR_VERSION 1
+#define CIFS_UNIX_MINOR_VERSION 0
+
+/* Linux/Unix extensions capability flags */
+#define CIFS_UNIX_FCNTL_CAP             0x00000001 /* support for fcntl locks */
+#define CIFS_UNIX_POSIX_ACL_CAP         0x00000002 /* support getfacl/setfacl */
+#define CIFS_UNIX_XATTR_CAP             0x00000004 /* support new namespace   */
+#define CIFS_UNIX_EXTATTR_CAP           0x00000008 /* support chattr/chflag   */
+#define CIFS_UNIX_POSIX_PATHNAMES_CAP   0x00000010 /* Allow POSIX path chars  */
+#define CIFS_UNIX_POSIX_PATH_OPS_CAP    0x00000020 /* Allow new POSIX path based
+						      calls including posix open
+						      and posix unlink */
+#define CIFS_UNIX_LARGE_READ_CAP        0x00000040 /* support reads >128K (up to 0xFFFF00 */
+#define CIFS_UNIX_LARGE_WRITE_CAP       0x00000080
+#define CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP 0x00000100 /* can do SPNEGO crypt */
+#define CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP  0x00000200 /* must do  */
+#define CIFS_UNIX_PROXY_CAP             0x00000400 /* Proxy cap: 0xACE ioctl and QFS PROXY call */
+#ifdef CONFIG_CIFS_POSIX
+/* presumably don't need the 0x20 POSIX_PATH_OPS_CAP since we never send
+   LockingX instead of posix locking call on unix sess (and we do not expect
+   LockingX to use different (ie Windows) semantics than posix locking on
+   the same session (if WINE needs to do this later, we can add this cap
+   back in later */
+/* #define CIFS_UNIX_CAP_MASK              0x000000fb */
+#define CIFS_UNIX_CAP_MASK              0x000003db
+#else
+#define CIFS_UNIX_CAP_MASK              0x00000013
+#endif /* CONFIG_CIFS_POSIX */
+
+
+#define CIFS_POSIX_EXTENSIONS           0x00000010 /* support for new QFSInfo */
+
+typedef struct {
+	/* For undefined recommended transfer size return -1 in that field */
+	__le32 OptimalTransferSize;  /* bsize on some os, iosize on other os */
+	__le32 BlockSize;
+    /* The next three fields are in terms of the block size.
+	(above). If block size is unknown, 4096 would be a
+	reasonable block size for a server to report.
+	Note that returning the blocks/blocksavail removes need
+	to make a second call (to QFSInfo level 0x103 to get this info.
+	UserBlockAvail is typically less than or equal to BlocksAvail,
+	if no distinction is made return the same value in each */
+	__le64 TotalBlocks;
+	__le64 BlocksAvail;       /* bfree */
+	__le64 UserBlocksAvail;   /* bavail */
+    /* For undefined Node fields or FSID return -1 */
+	__le64 TotalFileNodes;
+	__le64 FreeFileNodes;
+	__le64 FileSysIdentifier;   /* fsid */
+	/* NB Namelen comes from FILE_SYSTEM_ATTRIBUTE_INFO call */
+	/* NB flags can come from FILE_SYSTEM_DEVICE_INFO call   */
+} __attribute__((packed)) FILE_SYSTEM_POSIX_INFO;
+
+/* DeviceType Flags */
+#define FILE_DEVICE_CD_ROM              0x00000002
+#define FILE_DEVICE_CD_ROM_FILE_SYSTEM  0x00000003
+#define FILE_DEVICE_DFS                 0x00000006
+#define FILE_DEVICE_DISK                0x00000007
+#define FILE_DEVICE_DISK_FILE_SYSTEM    0x00000008
+#define FILE_DEVICE_FILE_SYSTEM         0x00000009
+#define FILE_DEVICE_NAMED_PIPE          0x00000011
+#define FILE_DEVICE_NETWORK             0x00000012
+#define FILE_DEVICE_NETWORK_FILE_SYSTEM 0x00000014
+#define FILE_DEVICE_NULL                0x00000015
+#define FILE_DEVICE_PARALLEL_PORT       0x00000016
+#define FILE_DEVICE_PRINTER             0x00000018
+#define FILE_DEVICE_SERIAL_PORT         0x0000001b
+#define FILE_DEVICE_STREAMS             0x0000001e
+#define FILE_DEVICE_TAPE                0x0000001f
+#define FILE_DEVICE_TAPE_FILE_SYSTEM    0x00000020
+#define FILE_DEVICE_VIRTUAL_DISK        0x00000024
+#define FILE_DEVICE_NETWORK_REDIRECTOR  0x00000028
+
+/* Device Characteristics */
+#define FILE_REMOVABLE_MEDIA			0x00000001
+#define FILE_READ_ONLY_DEVICE			0x00000002
+#define FILE_FLOPPY_DISKETTE			0x00000004
+#define FILE_WRITE_ONCE_MEDIA			0x00000008
+#define FILE_REMOTE_DEVICE			0x00000010
+#define FILE_DEVICE_IS_MOUNTED			0x00000020
+#define FILE_VIRTUAL_VOLUME			0x00000040
+#define FILE_DEVICE_SECURE_OPEN			0x00000100
+#define FILE_CHARACTERISTIC_TS_DEVICE		0x00001000
+#define FILE_CHARACTERISTIC_WEBDAV_DEVICE	0x00002000
+#define FILE_PORTABLE_DEVICE			0x00004000
+#define FILE_DEVICE_ALLOW_APPCONTAINER_TRAVERSAL 0x00020000
+
+typedef struct {
+	__le32 DeviceType;
+	__le32 DeviceCharacteristics;
+} __attribute__((packed)) FILE_SYSTEM_DEVICE_INFO; /* device info level 0x104 */
+
+/* minimum includes first three fields, and empty FS Name */
+#define MIN_FS_ATTR_INFO_SIZE 12
+
+
+/* List of FileSystemAttributes - see 2.5.1 of MS-FSCC */
+#define FILE_SUPPORTS_SPARSE_VDL	0x10000000 /* faster nonsparse extend */
+#define FILE_SUPPORTS_BLOCK_REFCOUNTING	0x08000000 /* allow ioctl dup extents */
+#define FILE_SUPPORT_INTEGRITY_STREAMS	0x04000000
+#define FILE_SUPPORTS_USN_JOURNAL	0x02000000
+#define FILE_SUPPORTS_OPEN_BY_FILE_ID	0x01000000
+#define FILE_SUPPORTS_EXTENDED_ATTRIBUTES 0x00800000
+#define FILE_SUPPORTS_HARD_LINKS	0x00400000
+#define FILE_SUPPORTS_TRANSACTIONS	0x00200000
+#define FILE_SEQUENTIAL_WRITE_ONCE	0x00100000
+#define FILE_READ_ONLY_VOLUME		0x00080000
+#define FILE_NAMED_STREAMS		0x00040000
+#define FILE_SUPPORTS_ENCRYPTION	0x00020000
+#define FILE_SUPPORTS_OBJECT_IDS	0x00010000
+#define FILE_VOLUME_IS_COMPRESSED	0x00008000
+#define FILE_SUPPORTS_REMOTE_STORAGE	0x00000100
+#define FILE_SUPPORTS_REPARSE_POINTS	0x00000080
+#define FILE_SUPPORTS_SPARSE_FILES	0x00000040
+#define FILE_VOLUME_QUOTAS		0x00000020
+#define FILE_FILE_COMPRESSION		0x00000010
+#define FILE_PERSISTENT_ACLS		0x00000008
+#define FILE_UNICODE_ON_DISK		0x00000004
+#define FILE_CASE_PRESERVED_NAMES	0x00000002
+#define FILE_CASE_SENSITIVE_SEARCH	0x00000001
+typedef struct {
+	__le32 Attributes;
+	__le32 MaxPathNameComponentLength;
+	__le32 FileSystemNameLen;
+	char FileSystemName[52]; /* do not have to save this - get subset? */
+} __attribute__((packed)) FILE_SYSTEM_ATTRIBUTE_INFO;
+
+/******************************************************************************/
+/* QueryFileInfo/QueryPathinfo (also for SetPath/SetFile) data buffer formats */
+/******************************************************************************/
+typedef struct { /* data block encoding of response to level 263 QPathInfo */
+	struct_group(common_attributes,
+		__le64 CreationTime;
+		__le64 LastAccessTime;
+		__le64 LastWriteTime;
+		__le64 ChangeTime;
+		__le32 Attributes;
+	);
+	__u32 Pad1;
+	__le64 AllocationSize;
+	__le64 EndOfFile;	/* size ie offset to first free byte in file */
+	__le32 NumberOfLinks;	/* hard links */
+	__u8 DeletePending;
+	__u8 Directory;
+	__u16 Pad2;
+	__le64 IndexNumber;
+	__le32 EASize;
+	__le32 AccessFlags;
+	__u64 IndexNumber1;
+	__le64 CurrentByteOffset;
+	__le32 Mode;
+	__le32 AlignmentRequirement;
+	__le32 FileNameLength;
+	union {
+		char __pad;
+		DECLARE_FLEX_ARRAY(char, FileName);
+	};
+} __attribute__((packed)) FILE_ALL_INFO;	/* level 0x107 QPathInfo */
+
+typedef struct {
+	__le64 AllocationSize;
+	__le64 EndOfFile;	/* size ie offset to first free byte in file */
+	__le32 NumberOfLinks;	/* hard links */
+	__u8 DeletePending;
+	__u8 Directory;
+	__u16 Pad;
+} __attribute__((packed)) FILE_STANDARD_INFO;	/* level 0x102 QPathInfo */
+
+
+/* defines for enumerating possible values of the Unix type field below */
+#define UNIX_FILE      0
+#define UNIX_DIR       1
+#define UNIX_SYMLINK   2
+#define UNIX_CHARDEV   3
+#define UNIX_BLOCKDEV  4
+#define UNIX_FIFO      5
+#define UNIX_SOCKET    6
+typedef struct {
+	__le64 EndOfFile;
+	__le64 NumOfBytes;
+	__le64 LastStatusChange; /*SNIA specs DCE time for the 3 time fields */
+	__le64 LastAccessTime;
+	__le64 LastModificationTime;
+	__le64 Uid;
+	__le64 Gid;
+	__le32 Type;
+	__le64 DevMajor;
+	__le64 DevMinor;
+	__le64 UniqueId;
+	__le64 Permissions;
+	__le64 Nlinks;
+} __attribute__((packed)) FILE_UNIX_BASIC_INFO;	/* level 0x200 QPathInfo */
+
+typedef struct {
+	DECLARE_FLEX_ARRAY(char, LinkDest);
+} __attribute__((packed)) FILE_UNIX_LINK_INFO;	/* level 0x201 QPathInfo */
+
+/* The following three structures are needed only for
+	setting time to NT4 and some older servers via
+	the primitive DOS time format */
+typedef struct {
+	__u16 Day:5;
+	__u16 Month:4;
+	__u16 Year:7;
+} __attribute__((packed)) SMB_DATE;
+
+typedef struct {
+	__u16 TwoSeconds:5;
+	__u16 Minutes:6;
+	__u16 Hours:5;
+} __attribute__((packed)) SMB_TIME;
+
+typedef struct {
+	__le16 CreationDate; /* SMB Date see above */
+	__le16 CreationTime; /* SMB Time */
+	__le16 LastAccessDate;
+	__le16 LastAccessTime;
+	__le16 LastWriteDate;
+	__le16 LastWriteTime;
+	__le32 DataSize; /* File Size (EOF) */
+	__le32 AllocationSize;
+	__le16 Attributes; /* verify not u32 */
+	__le32 EASize;
+} __attribute__((packed)) FILE_INFO_STANDARD;  /* level 1 SetPath/FileInfo */
+
+typedef struct {
+	__le64 CreationTime;
+	__le64 LastAccessTime;
+	__le64 LastWriteTime;
+	__le64 ChangeTime;
+	__le32 Attributes;
+	__u32 Pad;
+} __attribute__((packed)) FILE_BASIC_INFO;	/* size info, level 0x101 */
+
+struct file_allocation_info {
+	__le64 AllocationSize; /* Note old Samba srvr rounds this up too much */
+} __packed; /* size used on disk, for level 0x103 for set, 0x105 for query */
+
+struct file_end_of_file_info {
+	__le64 FileSize;		/* offset to end of file */
+} __attribute__((packed)); /* size info, level 0x104 for set, 0x106 for query */
+
+struct file_alt_name_info {
+	DECLARE_FLEX_ARRAY(__u8, alt_name);
+} __attribute__((packed));      /* level 0x0108 */
+
+struct file_stream_info {
+	__le32 number_of_streams;  /* BB check sizes and verify location */
+	/* followed by info on streams themselves
+		u64 size;
+		u64 allocation_size
+		stream info */
+};      /* level 0x109 */
+
+struct file_compression_info {
+	__le64 compressed_size;
+	__le16 format;
+	__u8   unit_shift;
+	__u8   ch_shift;
+	__u8   cl_shift;
+	__u8   pad[3];
+} __attribute__((packed));      /* level 0x10b */
+
+/* POSIX ACL set/query path info structures */
+#define CIFS_ACL_VERSION 1
+struct cifs_posix_ace { /* access control entry (ACE) */
+	__u8  cifs_e_tag;
+	__u8  cifs_e_perm;
+	__le64 cifs_uid; /* or gid */
+} __attribute__((packed));
+
+struct cifs_posix_acl { /* access conrol list  (ACL) */
+	__le16	version;
+	__le16	access_entry_count;  /* access ACL - count of entries */
+	__le16	default_entry_count; /* default ACL - count of entries */
+	struct cifs_posix_ace ace_array[];
+	/* followed by struct cifs_posix_ace default_ace_array[] */
+} __attribute__((packed));  /* level 0x204 */
+
+/* types of access control entries already defined in posix_acl.h */
+/* #define CIFS_POSIX_ACL_USER_OBJ	 0x01
+#define CIFS_POSIX_ACL_USER      0x02
+#define CIFS_POSIX_ACL_GROUP_OBJ 0x04
+#define CIFS_POSIX_ACL_GROUP     0x08
+#define CIFS_POSIX_ACL_MASK      0x10
+#define CIFS_POSIX_ACL_OTHER     0x20 */
+
+/* types of perms */
+/* #define CIFS_POSIX_ACL_EXECUTE   0x01
+#define CIFS_POSIX_ACL_WRITE     0x02
+#define CIFS_POSIX_ACL_READ	     0x04 */
+
+/* end of POSIX ACL definitions */
+
+/* POSIX Open Flags */
+#define SMB_O_RDONLY	0x1
+#define SMB_O_WRONLY	0x2
+#define SMB_O_RDWR	0x4
+#define SMB_O_CREAT	0x10
+#define SMB_O_EXCL	0x20
+#define SMB_O_TRUNC	0x40
+#define SMB_O_APPEND	0x80
+#define SMB_O_SYNC	0x100
+#define SMB_O_DIRECTORY	0x200
+#define SMB_O_NOFOLLOW	0x400
+#define SMB_O_DIRECT	0x800
+
+typedef struct {
+	__le32 OpenFlags; /* same as NT CreateX */
+	__le32 PosixOpenFlags;
+	__le64 Permissions;
+	__le16 Level; /* reply level requested (see QPathInfo levels) */
+} __attribute__((packed)) OPEN_PSX_REQ; /* level 0x209 SetPathInfo data */
+
+typedef struct {
+	__le16 OplockFlags;
+	__u16 Fid;
+	__le32 CreateAction;
+	__le16 ReturnedLevel;
+	__le16 Pad;
+	/* struct following varies based on requested level */
+} __attribute__((packed)) OPEN_PSX_RSP; /* level 0x209 SetPathInfo data */
+
+#define SMB_POSIX_UNLINK_FILE_TARGET		0
+#define SMB_POSIX_UNLINK_DIRECTORY_TARGET	1
+
+struct unlink_psx_rq { /* level 0x20a SetPathInfo */
+	__le16 type;
+} __attribute__((packed));
+
+struct file_internal_info {
+	__le64  UniqueId; /* inode number */
+} __attribute__((packed));      /* level 0x3ee */
+
+struct file_mode_info {
+	__le32	Mode;
+} __attribute__((packed));      /* level 0x3f8 */
+
+struct file_attrib_tag {
+	__le32 Attribute;
+	__le32 ReparseTag;
+} __attribute__((packed));      /* level 0x40b */
+
+
+/********************************************************/
+/*  FindFirst/FindNext transact2 data buffer formats    */
+/********************************************************/
+
+typedef struct {
+	__le32 NextEntryOffset;
+	__u32 ResumeKey; /* as with FileIndex - no need to convert */
+	FILE_UNIX_BASIC_INFO basic;
+	union {
+		char __pad;
+		DECLARE_FLEX_ARRAY(char, FileName);
+	};
+} __attribute__((packed)) FILE_UNIX_INFO; /* level 0x202 */
+
+typedef struct {
+	__le32 NextEntryOffset;
+	__u32 FileIndex;
+	__le64 CreationTime;
+	__le64 LastAccessTime;
+	__le64 LastWriteTime;
+	__le64 ChangeTime;
+	__le64 EndOfFile;
+	__le64 AllocationSize;
+	__le32 ExtFileAttributes;
+	__le32 FileNameLength;
+	char FileName[];
+} __attribute__((packed)) FILE_DIRECTORY_INFO;   /* level 0x101 FF resp data */
+
+typedef struct {
+	__le32 NextEntryOffset;
+	__u32 FileIndex;
+	__le64 CreationTime;
+	__le64 LastAccessTime;
+	__le64 LastWriteTime;
+	__le64 ChangeTime;
+	__le64 EndOfFile;
+	__le64 AllocationSize;
+	__le32 ExtFileAttributes;
+	__le32 FileNameLength;
+	__le32 EaSize; /* length of the xattrs */
+	char FileName[];
+} __attribute__((packed)) FILE_FULL_DIRECTORY_INFO; /* level 0x102 rsp data */
+
+typedef struct {
+	__le32 NextEntryOffset;
+	__u32 FileIndex;
+	__le64 CreationTime;
+	__le64 LastAccessTime;
+	__le64 LastWriteTime;
+	__le64 ChangeTime;
+	__le64 EndOfFile;
+	__le64 AllocationSize;
+	__le32 ExtFileAttributes;
+	__le32 FileNameLength;
+	__le32 EaSize; /* EA size */
+	__le32 Reserved;
+	__le64 UniqueId; /* inode num - le since Samba puts ino in low 32 bit*/
+	char FileName[];
+} __attribute__((packed)) SEARCH_ID_FULL_DIR_INFO; /* level 0x105 FF rsp data */
+
+typedef struct {
+	__le32 NextEntryOffset;
+	__u32 FileIndex;
+	__le64 CreationTime;
+	__le64 LastAccessTime;
+	__le64 LastWriteTime;
+	__le64 ChangeTime;
+	__le64 EndOfFile;
+	__le64 AllocationSize;
+	__le32 ExtFileAttributes;
+	__le32 FileNameLength;
+	__le32 EaSize; /* length of the xattrs */
+	__u8   ShortNameLength;
+	__u8   Reserved;
+	__u8   ShortName[24];
+	char FileName[];
+} __attribute__((packed)) FILE_BOTH_DIRECTORY_INFO; /* level 0x104 FFrsp data */
+
+typedef struct {
+	__u32  ResumeKey;
+	__le16 CreationDate; /* SMB Date */
+	__le16 CreationTime; /* SMB Time */
+	__le16 LastAccessDate;
+	__le16 LastAccessTime;
+	__le16 LastWriteDate;
+	__le16 LastWriteTime;
+	__le32 DataSize; /* File Size (EOF) */
+	__le32 AllocationSize;
+	__le16 Attributes; /* verify not u32 */
+	__u8   FileNameLength;
+	char FileName[];
+} __attribute__((packed)) FIND_FILE_STANDARD_INFO; /* level 0x1 FF resp data */
+
+
+struct win_dev {
+	unsigned char type[8]; /* IntxCHR or IntxBLK or LnxFIFO*/
+	__le64 major;
+	__le64 minor;
+} __attribute__((packed));
+
+struct fea {
+	unsigned char EA_flags;
+	__u8 name_len;
+	__le16 value_len;
+	char name[];
+	/* optionally followed by value */
+} __attribute__((packed));
+/* flags for _FEA.fEA */
+#define FEA_NEEDEA         0x80	/* need EA bit */
+
+struct fealist {
+	__le32 list_len;
+	struct fea list;
+} __attribute__((packed));
+
+/* used to hold an arbitrary blob of data */
+struct data_blob {
+	__u8 *data;
+	size_t length;
+	void (*free) (struct data_blob *data_blob);
+} __attribute__((packed));
+
+
+#ifdef CONFIG_CIFS_POSIX
+/*
+	For better POSIX semantics from Linux client, (even better
+	than the existing CIFS Unix Extensions) we need updated PDUs for:
+
+	1) PosixCreateX - to set and return the mode, inode#, device info and
+	perhaps add a CreateDevice - to create Pipes and other special .inodes
+	Also note POSIX open flags
+	2) Close - to return the last write time to do cache across close
+		more safely
+	3) FindFirst return unique inode number - what about resume key, two
+	forms short (matches readdir) and full (enough info to cache inodes)
+	4) Mkdir - set mode
+
+	And under consideration:
+	5) FindClose2 (return nanosecond timestamp ??)
+	6) Use nanosecond timestamps throughout all time fields if
+	   corresponding attribute flag is set
+	7) sendfile - handle based copy
+
+	what about fixing 64 bit alignment
+
+	There are also various legacy SMB/CIFS requests used as is
+
+	From existing Lanman and NTLM dialects:
+	--------------------------------------
+	NEGOTIATE
+	SESSION_SETUP_ANDX (BB which?)
+	TREE_CONNECT_ANDX (BB which wct?)
+	TREE_DISCONNECT (BB add volume timestamp on response)
+	LOGOFF_ANDX
+	DELETE (note delete open file behavior)
+	DELETE_DIRECTORY
+	READ_AND_X
+	WRITE_AND_X
+	LOCKING_AND_X (note posix lock semantics)
+	RENAME (note rename across dirs and open file rename posix behaviors)
+	NT_RENAME (for hardlinks) Is this good enough for all features?
+	FIND_CLOSE2
+	TRANSACTION2 (18 cases)
+		SMB_SET_FILE_END_OF_FILE_INFO2 SMB_SET_PATH_END_OF_FILE_INFO2
+		(BB verify that never need to set allocation size)
+		SMB_SET_FILE_BASIC_INFO2 (setting times - BB can it be done via
+			 Unix ext?)
+
+	COPY (note support for copy across directories) - FUTURE, OPTIONAL
+	setting/getting OS/2 EAs - FUTURE (BB can this handle
+	setting Linux xattrs perfectly)         - OPTIONAL
+	dnotify                                 - FUTURE, OPTIONAL
+	quota                                   - FUTURE, OPTIONAL
+
+	Note that various requests implemented for NT interop such as
+		NT_TRANSACT (IOCTL) QueryReparseInfo
+	are unneeded to servers compliant with the CIFS POSIX extensions
+
+	From CIFS Unix Extensions:
+	-------------------------
+	T2 SET_PATH_INFO (SMB_SET_FILE_UNIX_LINK) for symlinks
+	T2 SET_PATH_INFO (SMB_SET_FILE_BASIC_INFO2)
+	T2 QUERY_PATH_INFO (SMB_QUERY_FILE_UNIX_LINK)
+	T2 QUERY_PATH_INFO (SMB_QUERY_FILE_UNIX_BASIC)	BB check for missing
+							inode fields
+				Actually a need QUERY_FILE_UNIX_INFO
+				since has inode num
+				BB what about a) blksize/blkbits/blocks
+							  b) i_version
+							  c) i_rdev
+							  d) notify mask?
+							  e) generation
+							  f) size_seqcount
+	T2 FIND_FIRST/FIND_NEXT FIND_FILE_UNIX
+	TRANS2_GET_DFS_REFERRAL		      - OPTIONAL but recommended
+	T2_QFS_INFO QueryDevice/AttributeInfo - OPTIONAL
+ */
+
+/* xsymlink is a symlink format (used by MacOS) that can be used
+   to save symlink info in a regular file when
+   mounted to operating systems that do not
+   support the cifs Unix extensions or EAs (for xattr
+   based symlinks).  For such a file to be recognized
+   as containing symlink data:
+
+   1) file size must be 1067,
+   2) signature must begin file data,
+   3) length field must be set to ASCII representation
+	of a number which is less than or equal to 1024,
+   4) md5 must match that of the path data */
+
+struct xsymlink {
+	/* 1067 bytes */
+	char signature[4]; /* XSym */ /* not null terminated */
+	char cr0;         /* \n */
+/* ASCII representation of length (4 bytes decimal) terminated by \n not null */
+	char length[4];
+	char cr1;         /* \n */
+/* md5 of valid subset of path ie path[0] through path[length-1] */
+	__u8 md5[32];
+	char cr2;        /* \n */
+/* if room left, then end with \n then 0x20s by convention but not required */
+	char path[1024];
+} __attribute__((packed));
+
+typedef struct file_xattr_info {
+	/* BB do we need another field for flags? BB */
+	__u32 xattr_name_len;
+	__u32 xattr_value_len;
+	char  xattr_name[];
+	/* followed by xattr_value[xattr_value_len], no pad */
+} __packed FILE_XATTR_INFO; /* extended attribute info level 0x205 */
+
+/* flags for lsattr and chflags commands removed arein uapi/linux/fs.h */
+
+typedef struct file_chattr_info {
+	__le64	mask; /* list of all possible attribute bits */
+	__le64	mode; /* list of actual attribute bits on this inode */
+} __packed FILE_CHATTR_INFO;  /* ext attributes (chattr, chflags) level 0x206 */
+#endif				/* POSIX */
+#endif				/* _CIFSPDU_H */
diff --git a/fs/smb/client/cifsproto.h b/fs/smb/client/cifsproto.h
new file mode 100644
index 0000000000..c00f844205
--- /dev/null
+++ b/fs/smb/client/cifsproto.h
@@ -0,0 +1,760 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+/*
+ *
+ *   Copyright (c) International Business Machines  Corp., 2002,2008
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ */
+#ifndef _CIFSPROTO_H
+#define _CIFSPROTO_H
+#include <linux/nls.h>
+#include <linux/ctype.h>
+#include "trace.h"
+#ifdef CONFIG_CIFS_DFS_UPCALL
+#include "dfs_cache.h"
+#endif
+
+struct statfs;
+struct smb_rqst;
+struct smb3_fs_context;
+
+/*
+ *****************************************************************
+ * All Prototypes
+ *****************************************************************
+ */
+
+extern struct smb_hdr *cifs_buf_get(void);
+extern void cifs_buf_release(void *);
+extern struct smb_hdr *cifs_small_buf_get(void);
+extern void cifs_small_buf_release(void *);
+extern void free_rsp_buf(int, void *);
+extern int smb_send(struct TCP_Server_Info *, struct smb_hdr *,
+			unsigned int /* length */);
+extern unsigned int _get_xid(void);
+extern void _free_xid(unsigned int);
+#define get_xid()							\
+({									\
+	unsigned int __xid = _get_xid();				\
+	cifs_dbg(FYI, "VFS: in %s as Xid: %u with uid: %d\n",		\
+		 __func__, __xid,					\
+		 from_kuid(&init_user_ns, current_fsuid()));		\
+	trace_smb3_enter(__xid, __func__);				\
+	__xid;								\
+})
+
+#define free_xid(curr_xid)						\
+do {									\
+	_free_xid(curr_xid);						\
+	cifs_dbg(FYI, "VFS: leaving %s (xid = %u) rc = %d\n",		\
+		 __func__, curr_xid, (int)rc);				\
+	if (rc)								\
+		trace_smb3_exit_err(curr_xid, __func__, (int)rc);	\
+	else								\
+		trace_smb3_exit_done(curr_xid, __func__);		\
+} while (0)
+extern int init_cifs_idmap(void);
+extern void exit_cifs_idmap(void);
+extern int init_cifs_spnego(void);
+extern void exit_cifs_spnego(void);
+extern const char *build_path_from_dentry(struct dentry *, void *);
+char *__build_path_from_dentry_optional_prefix(struct dentry *direntry, void *page,
+					       const char *tree, int tree_len,
+					       bool prefix);
+extern char *build_path_from_dentry_optional_prefix(struct dentry *direntry,
+						    void *page, bool prefix);
+static inline void *alloc_dentry_path(void)
+{
+	return __getname();
+}
+
+static inline void free_dentry_path(void *page)
+{
+	if (page)
+		__putname(page);
+}
+
+extern char *cifs_build_path_to_root(struct smb3_fs_context *ctx,
+				     struct cifs_sb_info *cifs_sb,
+				     struct cifs_tcon *tcon,
+				     int add_treename);
+extern char *build_wildcard_path_from_dentry(struct dentry *direntry);
+char *cifs_build_devname(char *nodename, const char *prepath);
+extern void delete_mid(struct mid_q_entry *mid);
+void __release_mid(struct kref *refcount);
+extern void cifs_wake_up_task(struct mid_q_entry *mid);
+extern int cifs_handle_standard(struct TCP_Server_Info *server,
+				struct mid_q_entry *mid);
+extern char *smb3_fs_context_fullpath(const struct smb3_fs_context *ctx,
+				      char dirsep);
+extern int smb3_parse_devname(const char *devname, struct smb3_fs_context *ctx);
+extern int smb3_parse_opt(const char *options, const char *key, char **val);
+extern int cifs_ipaddr_cmp(struct sockaddr *srcaddr, struct sockaddr *rhs);
+extern bool cifs_match_ipaddr(struct sockaddr *srcaddr, struct sockaddr *rhs);
+extern int cifs_discard_remaining_data(struct TCP_Server_Info *server);
+extern int cifs_call_async(struct TCP_Server_Info *server,
+			struct smb_rqst *rqst,
+			mid_receive_t *receive, mid_callback_t *callback,
+			mid_handle_t *handle, void *cbdata, const int flags,
+			const struct cifs_credits *exist_credits);
+extern struct TCP_Server_Info *cifs_pick_channel(struct cifs_ses *ses);
+extern int cifs_send_recv(const unsigned int xid, struct cifs_ses *ses,
+			  struct TCP_Server_Info *server,
+			  struct smb_rqst *rqst, int *resp_buf_type,
+			  const int flags, struct kvec *resp_iov);
+extern int compound_send_recv(const unsigned int xid, struct cifs_ses *ses,
+			      struct TCP_Server_Info *server,
+			      const int flags, const int num_rqst,
+			      struct smb_rqst *rqst, int *resp_buf_type,
+			      struct kvec *resp_iov);
+extern int SendReceive(const unsigned int /* xid */ , struct cifs_ses *,
+			struct smb_hdr * /* input */ ,
+			struct smb_hdr * /* out */ ,
+			int * /* bytes returned */ , const int);
+extern int SendReceiveNoRsp(const unsigned int xid, struct cifs_ses *ses,
+			    char *in_buf, int flags);
+extern struct mid_q_entry *cifs_setup_request(struct cifs_ses *,
+				struct TCP_Server_Info *,
+				struct smb_rqst *);
+extern struct mid_q_entry *cifs_setup_async_request(struct TCP_Server_Info *,
+						struct smb_rqst *);
+extern int cifs_check_receive(struct mid_q_entry *mid,
+			struct TCP_Server_Info *server, bool log_error);
+extern int cifs_wait_mtu_credits(struct TCP_Server_Info *server,
+				 unsigned int size, unsigned int *num,
+				 struct cifs_credits *credits);
+extern int SendReceive2(const unsigned int /* xid */ , struct cifs_ses *,
+			struct kvec *, int /* nvec to send */,
+			int * /* type of buf returned */, const int flags,
+			struct kvec * /* resp vec */);
+extern int SendReceiveBlockingLock(const unsigned int xid,
+			struct cifs_tcon *ptcon,
+			struct smb_hdr *in_buf,
+			struct smb_hdr *out_buf,
+			int *bytes_returned);
+
+void
+cifs_signal_cifsd_for_reconnect(struct TCP_Server_Info *server,
+				      bool all_channels);
+void
+cifs_mark_tcp_ses_conns_for_reconnect(struct TCP_Server_Info *server,
+				      bool mark_smb_session);
+extern int cifs_reconnect(struct TCP_Server_Info *server,
+			  bool mark_smb_session);
+extern int checkSMB(char *buf, unsigned int len, struct TCP_Server_Info *srvr);
+extern bool is_valid_oplock_break(char *, struct TCP_Server_Info *);
+extern bool backup_cred(struct cifs_sb_info *);
+extern bool is_size_safe_to_change(struct cifsInodeInfo *, __u64 eof);
+extern void cifs_update_eof(struct cifsInodeInfo *cifsi, loff_t offset,
+			    unsigned int bytes_written);
+extern struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *, int);
+extern int cifs_get_writable_file(struct cifsInodeInfo *cifs_inode,
+				  int flags,
+				  struct cifsFileInfo **ret_file);
+extern int cifs_get_writable_path(struct cifs_tcon *tcon, const char *name,
+				  int flags,
+				  struct cifsFileInfo **ret_file);
+extern struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *, bool);
+extern int cifs_get_readable_path(struct cifs_tcon *tcon, const char *name,
+				  struct cifsFileInfo **ret_file);
+extern unsigned int smbCalcSize(void *buf);
+extern int decode_negTokenInit(unsigned char *security_blob, int length,
+			struct TCP_Server_Info *server);
+extern int cifs_convert_address(struct sockaddr *dst, const char *src, int len);
+extern void cifs_set_port(struct sockaddr *addr, const unsigned short int port);
+extern int map_smb_to_linux_error(char *buf, bool logErr);
+extern int map_and_check_smb_error(struct mid_q_entry *mid, bool logErr);
+extern void header_assemble(struct smb_hdr *, char /* command */ ,
+			    const struct cifs_tcon *, int /* length of
+			    fixed section (word count) in two byte units */);
+extern int small_smb_init_no_tc(const int smb_cmd, const int wct,
+				struct cifs_ses *ses,
+				void **request_buf);
+extern enum securityEnum select_sectype(struct TCP_Server_Info *server,
+				enum securityEnum requested);
+extern int CIFS_SessSetup(const unsigned int xid, struct cifs_ses *ses,
+			  struct TCP_Server_Info *server,
+			  const struct nls_table *nls_cp);
+extern struct timespec64 cifs_NTtimeToUnix(__le64 utc_nanoseconds_since_1601);
+extern u64 cifs_UnixTimeToNT(struct timespec64);
+extern struct timespec64 cnvrtDosUnixTm(__le16 le_date, __le16 le_time,
+				      int offset);
+extern void cifs_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock);
+extern int cifs_get_writer(struct cifsInodeInfo *cinode);
+extern void cifs_put_writer(struct cifsInodeInfo *cinode);
+extern void cifs_done_oplock_break(struct cifsInodeInfo *cinode);
+extern int cifs_unlock_range(struct cifsFileInfo *cfile,
+			     struct file_lock *flock, const unsigned int xid);
+extern int cifs_push_mandatory_locks(struct cifsFileInfo *cfile);
+
+extern void cifs_down_write(struct rw_semaphore *sem);
+struct cifsFileInfo *cifs_new_fileinfo(struct cifs_fid *fid, struct file *file,
+				       struct tcon_link *tlink, __u32 oplock,
+				       const char *symlink_target);
+extern int cifs_posix_open(const char *full_path, struct inode **inode,
+			   struct super_block *sb, int mode,
+			   unsigned int f_flags, __u32 *oplock, __u16 *netfid,
+			   unsigned int xid);
+void cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr);
+extern void cifs_unix_basic_to_fattr(struct cifs_fattr *fattr,
+				     FILE_UNIX_BASIC_INFO *info,
+				     struct cifs_sb_info *cifs_sb);
+extern void cifs_dir_info_to_fattr(struct cifs_fattr *, FILE_DIRECTORY_INFO *,
+					struct cifs_sb_info *);
+extern int cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr);
+extern struct inode *cifs_iget(struct super_block *sb,
+			       struct cifs_fattr *fattr);
+
+int cifs_get_inode_info(struct inode **inode, const char *full_path,
+			struct cifs_open_info_data *data, struct super_block *sb, int xid,
+			const struct cifs_fid *fid);
+bool cifs_reparse_point_to_fattr(struct cifs_sb_info *cifs_sb,
+				 struct cifs_fattr *fattr,
+				 struct cifs_open_info_data *data);
+extern int smb311_posix_get_inode_info(struct inode **pinode, const char *search_path,
+			struct super_block *sb, unsigned int xid);
+extern int cifs_get_inode_info_unix(struct inode **pinode,
+			const unsigned char *search_path,
+			struct super_block *sb, unsigned int xid);
+extern int cifs_set_file_info(struct inode *inode, struct iattr *attrs,
+			      unsigned int xid, const char *full_path, __u32 dosattr);
+extern int cifs_rename_pending_delete(const char *full_path,
+				      struct dentry *dentry,
+				      const unsigned int xid);
+extern int sid_to_id(struct cifs_sb_info *cifs_sb, struct cifs_sid *psid,
+				struct cifs_fattr *fattr, uint sidtype);
+extern int cifs_acl_to_fattr(struct cifs_sb_info *cifs_sb,
+			      struct cifs_fattr *fattr, struct inode *inode,
+			      bool get_mode_from_special_sid,
+			      const char *path, const struct cifs_fid *pfid);
+extern int id_mode_to_cifs_acl(struct inode *inode, const char *path, __u64 *pnmode,
+					kuid_t uid, kgid_t gid);
+extern struct cifs_ntsd *get_cifs_acl(struct cifs_sb_info *, struct inode *,
+				      const char *, u32 *, u32);
+extern struct cifs_ntsd *get_cifs_acl_by_fid(struct cifs_sb_info *,
+				const struct cifs_fid *, u32 *, u32);
+extern struct posix_acl *cifs_get_acl(struct mnt_idmap *idmap,
+				      struct dentry *dentry, int type);
+extern int cifs_set_acl(struct mnt_idmap *idmap,
+			struct dentry *dentry, struct posix_acl *acl, int type);
+extern int set_cifs_acl(struct cifs_ntsd *, __u32, struct inode *,
+				const char *, int);
+extern unsigned int setup_authusers_ACE(struct cifs_ace *pace);
+extern unsigned int setup_special_mode_ACE(struct cifs_ace *pace, __u64 nmode);
+extern unsigned int setup_special_user_owner_ACE(struct cifs_ace *pace);
+
+extern void dequeue_mid(struct mid_q_entry *mid, bool malformed);
+extern int cifs_read_from_socket(struct TCP_Server_Info *server, char *buf,
+			         unsigned int to_read);
+extern ssize_t cifs_discard_from_socket(struct TCP_Server_Info *server,
+					size_t to_read);
+extern int cifs_read_page_from_socket(struct TCP_Server_Info *server,
+					struct page *page,
+					unsigned int page_offset,
+					unsigned int to_read);
+int cifs_read_iter_from_socket(struct TCP_Server_Info *server,
+			       struct iov_iter *iter,
+			       unsigned int to_read);
+extern int cifs_setup_cifs_sb(struct cifs_sb_info *cifs_sb);
+void cifs_mount_put_conns(struct cifs_mount_ctx *mnt_ctx);
+int cifs_mount_get_session(struct cifs_mount_ctx *mnt_ctx);
+int cifs_is_path_remote(struct cifs_mount_ctx *mnt_ctx);
+int cifs_mount_get_tcon(struct cifs_mount_ctx *mnt_ctx);
+extern int cifs_match_super(struct super_block *, void *);
+extern int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb3_fs_context *ctx);
+extern void cifs_umount(struct cifs_sb_info *);
+extern void cifs_mark_open_files_invalid(struct cifs_tcon *tcon);
+extern void cifs_reopen_persistent_handles(struct cifs_tcon *tcon);
+
+extern bool cifs_find_lock_conflict(struct cifsFileInfo *cfile, __u64 offset,
+				    __u64 length, __u8 type, __u16 flags,
+				    struct cifsLockInfo **conf_lock,
+				    int rw_check);
+extern void cifs_add_pending_open(struct cifs_fid *fid,
+				  struct tcon_link *tlink,
+				  struct cifs_pending_open *open);
+extern void cifs_add_pending_open_locked(struct cifs_fid *fid,
+					 struct tcon_link *tlink,
+					 struct cifs_pending_open *open);
+extern void cifs_del_pending_open(struct cifs_pending_open *open);
+
+extern bool cifs_is_deferred_close(struct cifsFileInfo *cfile,
+				struct cifs_deferred_close **dclose);
+
+extern void cifs_add_deferred_close(struct cifsFileInfo *cfile,
+				struct cifs_deferred_close *dclose);
+
+extern void cifs_del_deferred_close(struct cifsFileInfo *cfile);
+
+extern void cifs_close_deferred_file(struct cifsInodeInfo *cifs_inode);
+
+extern void cifs_close_all_deferred_files(struct cifs_tcon *cifs_tcon);
+
+extern void cifs_close_deferred_file_under_dentry(struct cifs_tcon *cifs_tcon,
+				const char *path);
+extern struct TCP_Server_Info *
+cifs_get_tcp_session(struct smb3_fs_context *ctx,
+		     struct TCP_Server_Info *primary_server);
+extern void cifs_put_tcp_session(struct TCP_Server_Info *server,
+				 int from_reconnect);
+extern void cifs_put_tcon(struct cifs_tcon *tcon);
+
+extern void cifs_release_automount_timer(void);
+
+void cifs_proc_init(void);
+void cifs_proc_clean(void);
+
+extern void cifs_move_llist(struct list_head *source, struct list_head *dest);
+extern void cifs_free_llist(struct list_head *llist);
+extern void cifs_del_lock_waiters(struct cifsLockInfo *lock);
+
+extern int cifs_tree_connect(const unsigned int xid, struct cifs_tcon *tcon,
+			     const struct nls_table *nlsc);
+
+extern int cifs_negotiate_protocol(const unsigned int xid,
+				   struct cifs_ses *ses,
+				   struct TCP_Server_Info *server);
+extern int cifs_setup_session(const unsigned int xid, struct cifs_ses *ses,
+			      struct TCP_Server_Info *server,
+			      struct nls_table *nls_info);
+extern int cifs_enable_signing(struct TCP_Server_Info *server, bool mnt_sign_required);
+extern int CIFSSMBNegotiate(const unsigned int xid,
+			    struct cifs_ses *ses,
+			    struct TCP_Server_Info *server);
+
+extern int CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
+		    const char *tree, struct cifs_tcon *tcon,
+		    const struct nls_table *);
+
+extern int CIFSFindFirst(const unsigned int xid, struct cifs_tcon *tcon,
+		const char *searchName, struct cifs_sb_info *cifs_sb,
+		__u16 *searchHandle, __u16 search_flags,
+		struct cifs_search_info *psrch_inf,
+		bool msearch);
+
+extern int CIFSFindNext(const unsigned int xid, struct cifs_tcon *tcon,
+		__u16 searchHandle, __u16 search_flags,
+		struct cifs_search_info *psrch_inf);
+
+extern int CIFSFindClose(const unsigned int xid, struct cifs_tcon *tcon,
+			const __u16 search_handle);
+
+extern int CIFSSMBQFileInfo(const unsigned int xid, struct cifs_tcon *tcon,
+			u16 netfid, FILE_ALL_INFO *pFindData);
+extern int CIFSSMBQPathInfo(const unsigned int xid, struct cifs_tcon *tcon,
+			    const char *search_Name, FILE_ALL_INFO *data,
+			    int legacy /* whether to use old info level */,
+			    const struct nls_table *nls_codepage, int remap);
+extern int SMBQueryInformation(const unsigned int xid, struct cifs_tcon *tcon,
+			       const char *search_name, FILE_ALL_INFO *data,
+			       const struct nls_table *nls_codepage, int remap);
+
+extern int CIFSSMBUnixQFileInfo(const unsigned int xid, struct cifs_tcon *tcon,
+			u16 netfid, FILE_UNIX_BASIC_INFO *pFindData);
+extern int CIFSSMBUnixQPathInfo(const unsigned int xid,
+			struct cifs_tcon *tcon,
+			const unsigned char *searchName,
+			FILE_UNIX_BASIC_INFO *pFindData,
+			const struct nls_table *nls_codepage, int remap);
+
+extern int CIFSGetDFSRefer(const unsigned int xid, struct cifs_ses *ses,
+			   const char *search_name,
+			   struct dfs_info3_param **target_nodes,
+			   unsigned int *num_of_nodes,
+			   const struct nls_table *nls_codepage, int remap);
+
+extern int parse_dfs_referrals(struct get_dfs_referral_rsp *rsp, u32 rsp_size,
+			       unsigned int *num_of_nodes,
+			       struct dfs_info3_param **target_nodes,
+			       const struct nls_table *nls_codepage, int remap,
+			       const char *searchName, bool is_unicode);
+extern void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon,
+				 struct cifs_sb_info *cifs_sb,
+				 struct smb3_fs_context *ctx);
+extern int CIFSSMBQFSInfo(const unsigned int xid, struct cifs_tcon *tcon,
+			struct kstatfs *FSData);
+extern int SMBOldQFSInfo(const unsigned int xid, struct cifs_tcon *tcon,
+			struct kstatfs *FSData);
+extern int CIFSSMBSetFSUnixInfo(const unsigned int xid, struct cifs_tcon *tcon,
+			__u64 cap);
+
+extern int CIFSSMBQFSAttributeInfo(const unsigned int xid,
+			struct cifs_tcon *tcon);
+extern int CIFSSMBQFSDeviceInfo(const unsigned int xid, struct cifs_tcon *tcon);
+extern int CIFSSMBQFSUnixInfo(const unsigned int xid, struct cifs_tcon *tcon);
+extern int CIFSSMBQFSPosixInfo(const unsigned int xid, struct cifs_tcon *tcon,
+			struct kstatfs *FSData);
+
+extern int CIFSSMBSetPathInfo(const unsigned int xid, struct cifs_tcon *tcon,
+			const char *fileName, const FILE_BASIC_INFO *data,
+			const struct nls_table *nls_codepage,
+			struct cifs_sb_info *cifs_sb);
+extern int CIFSSMBSetFileInfo(const unsigned int xid, struct cifs_tcon *tcon,
+			const FILE_BASIC_INFO *data, __u16 fid,
+			__u32 pid_of_opener);
+extern int CIFSSMBSetFileDisposition(const unsigned int xid,
+				     struct cifs_tcon *tcon,
+				     bool delete_file, __u16 fid,
+				     __u32 pid_of_opener);
+extern int CIFSSMBSetEOF(const unsigned int xid, struct cifs_tcon *tcon,
+			 const char *file_name, __u64 size,
+			 struct cifs_sb_info *cifs_sb, bool set_allocation);
+extern int CIFSSMBSetFileSize(const unsigned int xid, struct cifs_tcon *tcon,
+			      struct cifsFileInfo *cfile, __u64 size,
+			      bool set_allocation);
+
+struct cifs_unix_set_info_args {
+	__u64	ctime;
+	__u64	atime;
+	__u64	mtime;
+	__u64	mode;
+	kuid_t	uid;
+	kgid_t	gid;
+	dev_t	device;
+};
+
+extern int CIFSSMBUnixSetFileInfo(const unsigned int xid,
+				  struct cifs_tcon *tcon,
+				  const struct cifs_unix_set_info_args *args,
+				  u16 fid, u32 pid_of_opener);
+
+extern int CIFSSMBUnixSetPathInfo(const unsigned int xid,
+				  struct cifs_tcon *tcon, const char *file_name,
+				  const struct cifs_unix_set_info_args *args,
+				  const struct nls_table *nls_codepage,
+				  int remap);
+
+extern int CIFSSMBMkDir(const unsigned int xid, struct inode *inode,
+			umode_t mode, struct cifs_tcon *tcon,
+			const char *name, struct cifs_sb_info *cifs_sb);
+extern int CIFSSMBRmDir(const unsigned int xid, struct cifs_tcon *tcon,
+			const char *name, struct cifs_sb_info *cifs_sb);
+extern int CIFSPOSIXDelFile(const unsigned int xid, struct cifs_tcon *tcon,
+			const char *name, __u16 type,
+			const struct nls_table *nls_codepage,
+			int remap_special_chars);
+extern int CIFSSMBDelFile(const unsigned int xid, struct cifs_tcon *tcon,
+			  const char *name, struct cifs_sb_info *cifs_sb);
+extern int CIFSSMBRename(const unsigned int xid, struct cifs_tcon *tcon,
+			 const char *from_name, const char *to_name,
+			 struct cifs_sb_info *cifs_sb);
+extern int CIFSSMBRenameOpenFile(const unsigned int xid, struct cifs_tcon *tcon,
+				 int netfid, const char *target_name,
+				 const struct nls_table *nls_codepage,
+				 int remap_special_chars);
+extern int CIFSCreateHardLink(const unsigned int xid, struct cifs_tcon *tcon,
+			      const char *from_name, const char *to_name,
+			      struct cifs_sb_info *cifs_sb);
+extern int CIFSUnixCreateHardLink(const unsigned int xid,
+			struct cifs_tcon *tcon,
+			const char *fromName, const char *toName,
+			const struct nls_table *nls_codepage,
+			int remap_special_chars);
+extern int CIFSUnixCreateSymLink(const unsigned int xid,
+			struct cifs_tcon *tcon,
+			const char *fromName, const char *toName,
+			const struct nls_table *nls_codepage, int remap);
+extern int CIFSSMBUnixQuerySymLink(const unsigned int xid,
+			struct cifs_tcon *tcon,
+			const unsigned char *searchName, char **syminfo,
+			const struct nls_table *nls_codepage, int remap);
+extern int cifs_query_reparse_point(const unsigned int xid,
+				    struct cifs_tcon *tcon,
+				    struct cifs_sb_info *cifs_sb,
+				    const char *full_path,
+				    u32 *tag, struct kvec *rsp,
+				    int *rsp_buftype);
+extern int CIFSSMBQuerySymLink(const unsigned int xid, struct cifs_tcon *tcon,
+			       __u16 fid, char **symlinkinfo,
+			       const struct nls_table *nls_codepage);
+extern int CIFSSMB_set_compression(const unsigned int xid,
+				   struct cifs_tcon *tcon, __u16 fid);
+extern int CIFS_open(const unsigned int xid, struct cifs_open_parms *oparms,
+		     int *oplock, FILE_ALL_INFO *buf);
+extern int SMBLegacyOpen(const unsigned int xid, struct cifs_tcon *tcon,
+			const char *fileName, const int disposition,
+			const int access_flags, const int omode,
+			__u16 *netfid, int *pOplock, FILE_ALL_INFO *,
+			const struct nls_table *nls_codepage, int remap);
+extern int CIFSPOSIXCreate(const unsigned int xid, struct cifs_tcon *tcon,
+			u32 posix_flags, __u64 mode, __u16 *netfid,
+			FILE_UNIX_BASIC_INFO *pRetData,
+			__u32 *pOplock, const char *name,
+			const struct nls_table *nls_codepage, int remap);
+extern int CIFSSMBClose(const unsigned int xid, struct cifs_tcon *tcon,
+			const int smb_file_id);
+
+extern int CIFSSMBFlush(const unsigned int xid, struct cifs_tcon *tcon,
+			const int smb_file_id);
+
+extern int CIFSSMBRead(const unsigned int xid, struct cifs_io_parms *io_parms,
+			unsigned int *nbytes, char **buf,
+			int *return_buf_type);
+extern int CIFSSMBWrite(const unsigned int xid, struct cifs_io_parms *io_parms,
+			unsigned int *nbytes, const char *buf);
+extern int CIFSSMBWrite2(const unsigned int xid, struct cifs_io_parms *io_parms,
+			unsigned int *nbytes, struct kvec *iov, const int nvec);
+extern int CIFSGetSrvInodeNumber(const unsigned int xid, struct cifs_tcon *tcon,
+				 const char *search_name, __u64 *inode_number,
+				 const struct nls_table *nls_codepage,
+				 int remap);
+
+extern int cifs_lockv(const unsigned int xid, struct cifs_tcon *tcon,
+		      const __u16 netfid, const __u8 lock_type,
+		      const __u32 num_unlock, const __u32 num_lock,
+		      LOCKING_ANDX_RANGE *buf);
+extern int CIFSSMBLock(const unsigned int xid, struct cifs_tcon *tcon,
+			const __u16 netfid, const __u32 netpid, const __u64 len,
+			const __u64 offset, const __u32 numUnlock,
+			const __u32 numLock, const __u8 lockType,
+			const bool waitFlag, const __u8 oplock_level);
+extern int CIFSSMBPosixLock(const unsigned int xid, struct cifs_tcon *tcon,
+			const __u16 smb_file_id, const __u32 netpid,
+			const loff_t start_offset, const __u64 len,
+			struct file_lock *, const __u16 lock_type,
+			const bool waitFlag);
+extern int CIFSSMBTDis(const unsigned int xid, struct cifs_tcon *tcon);
+extern int CIFSSMBEcho(struct TCP_Server_Info *server);
+extern int CIFSSMBLogoff(const unsigned int xid, struct cifs_ses *ses);
+
+extern struct cifs_ses *sesInfoAlloc(void);
+extern void sesInfoFree(struct cifs_ses *);
+extern struct cifs_tcon *tcon_info_alloc(bool dir_leases_enabled);
+extern void tconInfoFree(struct cifs_tcon *);
+
+extern int cifs_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server,
+		   __u32 *pexpected_response_sequence_number);
+extern int cifs_sign_smbv(struct kvec *iov, int n_vec, struct TCP_Server_Info *,
+			  __u32 *);
+extern int cifs_sign_smb(struct smb_hdr *, struct TCP_Server_Info *, __u32 *);
+extern int cifs_verify_signature(struct smb_rqst *rqst,
+				 struct TCP_Server_Info *server,
+				__u32 expected_sequence_number);
+extern int setup_ntlmv2_rsp(struct cifs_ses *, const struct nls_table *);
+extern void cifs_crypto_secmech_release(struct TCP_Server_Info *server);
+extern int calc_seckey(struct cifs_ses *);
+extern int generate_smb30signingkey(struct cifs_ses *ses,
+				    struct TCP_Server_Info *server);
+extern int generate_smb311signingkey(struct cifs_ses *ses,
+				     struct TCP_Server_Info *server);
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+extern int CIFSSMBCopy(unsigned int xid,
+			struct cifs_tcon *source_tcon,
+			const char *fromName,
+			const __u16 target_tid,
+			const char *toName, const int flags,
+			const struct nls_table *nls_codepage,
+			int remap_special_chars);
+extern ssize_t CIFSSMBQAllEAs(const unsigned int xid, struct cifs_tcon *tcon,
+			const unsigned char *searchName,
+			const unsigned char *ea_name, char *EAData,
+			size_t bufsize, struct cifs_sb_info *cifs_sb);
+extern int CIFSSMBSetEA(const unsigned int xid, struct cifs_tcon *tcon,
+		const char *fileName, const char *ea_name,
+		const void *ea_value, const __u16 ea_value_len,
+		const struct nls_table *nls_codepage,
+		struct cifs_sb_info *cifs_sb);
+extern int CIFSSMBGetCIFSACL(const unsigned int xid, struct cifs_tcon *tcon,
+			__u16 fid, struct cifs_ntsd **acl_inf, __u32 *buflen);
+extern int CIFSSMBSetCIFSACL(const unsigned int, struct cifs_tcon *, __u16,
+			struct cifs_ntsd *, __u32, int);
+extern int cifs_do_get_acl(const unsigned int xid, struct cifs_tcon *tcon,
+			   const unsigned char *searchName,
+			   struct posix_acl **acl, const int acl_type,
+			   const struct nls_table *nls_codepage, int remap);
+extern int cifs_do_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
+			   const unsigned char *fileName,
+			   const struct posix_acl *acl, const int acl_type,
+			   const struct nls_table *nls_codepage, int remap);
+extern int CIFSGetExtAttr(const unsigned int xid, struct cifs_tcon *tcon,
+			const int netfid, __u64 *pExtAttrBits, __u64 *pMask);
+#endif /* CIFS_ALLOW_INSECURE_LEGACY */
+extern void cifs_autodisable_serverino(struct cifs_sb_info *cifs_sb);
+extern bool couldbe_mf_symlink(const struct cifs_fattr *fattr);
+extern int check_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
+			      struct cifs_sb_info *cifs_sb,
+			      struct cifs_fattr *fattr,
+			      const unsigned char *path);
+extern int E_md4hash(const unsigned char *passwd, unsigned char *p16,
+			const struct nls_table *codepage);
+
+extern struct TCP_Server_Info *
+cifs_find_tcp_session(struct smb3_fs_context *ctx);
+
+void __cifs_put_smb_ses(struct cifs_ses *ses);
+
+extern struct cifs_ses *
+cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb3_fs_context *ctx);
+
+void cifs_readdata_release(struct kref *refcount);
+int cifs_async_readv(struct cifs_readdata *rdata);
+int cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid);
+
+int cifs_async_writev(struct cifs_writedata *wdata,
+		      void (*release)(struct kref *kref));
+void cifs_writev_complete(struct work_struct *work);
+struct cifs_writedata *cifs_writedata_alloc(work_func_t complete);
+void cifs_writedata_release(struct kref *refcount);
+int cifs_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
+			  struct cifs_sb_info *cifs_sb,
+			  const unsigned char *path, char *pbuf,
+			  unsigned int *pbytes_read);
+int cifs_create_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
+			   struct cifs_sb_info *cifs_sb,
+			   const unsigned char *path, char *pbuf,
+			   unsigned int *pbytes_written);
+int __cifs_calc_signature(struct smb_rqst *rqst,
+			struct TCP_Server_Info *server, char *signature,
+			struct shash_desc *shash);
+enum securityEnum cifs_select_sectype(struct TCP_Server_Info *,
+					enum securityEnum);
+struct cifs_aio_ctx *cifs_aio_ctx_alloc(void);
+void cifs_aio_ctx_release(struct kref *refcount);
+
+int cifs_alloc_hash(const char *name, struct shash_desc **sdesc);
+void cifs_free_hash(struct shash_desc **sdesc);
+
+struct cifs_chan *
+cifs_ses_find_chan(struct cifs_ses *ses, struct TCP_Server_Info *server);
+int cifs_try_adding_channels(struct cifs_ses *ses);
+bool is_server_using_iface(struct TCP_Server_Info *server,
+			   struct cifs_server_iface *iface);
+bool is_ses_using_iface(struct cifs_ses *ses, struct cifs_server_iface *iface);
+void cifs_ses_mark_for_reconnect(struct cifs_ses *ses);
+
+int
+cifs_ses_get_chan_index(struct cifs_ses *ses,
+			struct TCP_Server_Info *server);
+void
+cifs_chan_set_in_reconnect(struct cifs_ses *ses,
+			     struct TCP_Server_Info *server);
+void
+cifs_chan_clear_in_reconnect(struct cifs_ses *ses,
+			       struct TCP_Server_Info *server);
+bool
+cifs_chan_in_reconnect(struct cifs_ses *ses,
+			  struct TCP_Server_Info *server);
+void
+cifs_chan_set_need_reconnect(struct cifs_ses *ses,
+			     struct TCP_Server_Info *server);
+void
+cifs_chan_clear_need_reconnect(struct cifs_ses *ses,
+			       struct TCP_Server_Info *server);
+bool
+cifs_chan_needs_reconnect(struct cifs_ses *ses,
+			  struct TCP_Server_Info *server);
+bool
+cifs_chan_is_iface_active(struct cifs_ses *ses,
+			  struct TCP_Server_Info *server);
+void
+cifs_disable_secondary_channels(struct cifs_ses *ses);
+int
+cifs_chan_update_iface(struct cifs_ses *ses, struct TCP_Server_Info *server);
+int
+SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount);
+
+void extract_unc_hostname(const char *unc, const char **h, size_t *len);
+int copy_path_name(char *dst, const char *src);
+int smb2_parse_query_directory(struct cifs_tcon *tcon, struct kvec *rsp_iov,
+			       int resp_buftype,
+			       struct cifs_search_info *srch_inf);
+
+struct super_block *cifs_get_dfs_tcon_super(struct cifs_tcon *tcon);
+void cifs_put_tcp_super(struct super_block *sb);
+int cifs_update_super_prepath(struct cifs_sb_info *cifs_sb, char *prefix);
+char *extract_hostname(const char *unc);
+char *extract_sharename(const char *unc);
+int parse_reparse_point(struct reparse_data_buffer *buf,
+			u32 plen, struct cifs_sb_info *cifs_sb,
+			bool unicode, struct cifs_open_info_data *data);
+
+#ifdef CONFIG_CIFS_DFS_UPCALL
+static inline int get_dfs_path(const unsigned int xid, struct cifs_ses *ses,
+			       const char *old_path,
+			       const struct nls_table *nls_codepage,
+			       struct dfs_info3_param *referral, int remap)
+{
+	return dfs_cache_find(xid, ses, nls_codepage, remap, old_path,
+			      referral, NULL);
+}
+
+int match_target_ip(struct TCP_Server_Info *server,
+		    const char *share, size_t share_len,
+		    bool *result);
+int cifs_inval_name_dfs_link_error(const unsigned int xid,
+				   struct cifs_tcon *tcon,
+				   struct cifs_sb_info *cifs_sb,
+				   const char *full_path,
+				   bool *islink);
+#else
+static inline int cifs_inval_name_dfs_link_error(const unsigned int xid,
+				   struct cifs_tcon *tcon,
+				   struct cifs_sb_info *cifs_sb,
+				   const char *full_path,
+				   bool *islink)
+{
+	*islink = false;
+	return 0;
+}
+#endif
+
+static inline int cifs_create_options(struct cifs_sb_info *cifs_sb, int options)
+{
+	if (cifs_sb && (backup_cred(cifs_sb)))
+		return options | CREATE_OPEN_BACKUP_INTENT;
+	else
+		return options;
+}
+
+struct super_block *cifs_get_tcon_super(struct cifs_tcon *tcon);
+void cifs_put_tcon_super(struct super_block *sb);
+int cifs_wait_for_server_reconnect(struct TCP_Server_Info *server, bool retry);
+
+/* Put references of @ses and @ses->dfs_root_ses */
+static inline void cifs_put_smb_ses(struct cifs_ses *ses)
+{
+	struct cifs_ses *rses = ses->dfs_root_ses;
+
+	__cifs_put_smb_ses(ses);
+	if (rses)
+		__cifs_put_smb_ses(rses);
+}
+
+/* Get an active reference of @ses and @ses->dfs_root_ses.
+ *
+ * NOTE: make sure to call this function when incrementing reference count of
+ * @ses to ensure that any DFS root session attached to it (@ses->dfs_root_ses)
+ * will also get its reference count incremented.
+ *
+ * cifs_put_smb_ses() will put both references, so call it when you're done.
+ */
+static inline void cifs_smb_ses_inc_refcount(struct cifs_ses *ses)
+{
+	lockdep_assert_held(&cifs_tcp_ses_lock);
+
+	ses->ses_count++;
+	if (ses->dfs_root_ses)
+		ses->dfs_root_ses->ses_count++;
+}
+
+static inline bool dfs_src_pathname_equal(const char *s1, const char *s2)
+{
+	if (strlen(s1) != strlen(s2))
+		return false;
+	for (; *s1; s1++, s2++) {
+		if (*s1 == '/' || *s1 == '\\') {
+			if (*s2 != '/' && *s2 != '\\')
+				return false;
+		} else if (tolower(*s1) != tolower(*s2))
+			return false;
+	}
+	return true;
+}
+
+static inline void release_mid(struct mid_q_entry *mid)
+{
+	kref_put(&mid->refcount, __release_mid);
+}
+
+#endif			/* _CIFSPROTO_H */
diff --git a/fs/smb/client/cifsroot.c b/fs/smb/client/cifsroot.c
new file mode 100644
index 0000000000..56ec1b233f
--- /dev/null
+++ b/fs/smb/client/cifsroot.c
@@ -0,0 +1,94 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * SMB root file system support
+ *
+ * Copyright (c) 2019 Paulo Alcantara <palcantara@suse.de>
+ */
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/types.h>
+#include <linux/ctype.h>
+#include <linux/string.h>
+#include <linux/root_dev.h>
+#include <linux/kernel.h>
+#include <linux/in.h>
+#include <linux/inet.h>
+#include <net/ipconfig.h>
+
+#define DEFAULT_MNT_OPTS \
+	"vers=1.0,cifsacl,mfsymlinks,rsize=1048576,wsize=65536,uid=0,gid=0," \
+	"hard,rootfs"
+
+static char root_dev[2048] __initdata = "";
+static char root_opts[1024] __initdata = DEFAULT_MNT_OPTS;
+
+static __be32 __init parse_srvaddr(char *start, char *end)
+{
+	/* TODO: ipv6 support */
+	char addr[sizeof("aaa.bbb.ccc.ddd")];
+	int i = 0;
+
+	while (start < end && i < sizeof(addr) - 1) {
+		if (isdigit(*start) || *start == '.')
+			addr[i++] = *start;
+		start++;
+	}
+	addr[i] = '\0';
+	return in_aton(addr);
+}
+
+/* cifsroot=//<server-ip>/<share>[,options] */
+static int __init cifs_root_setup(char *line)
+{
+	char *s;
+	int len;
+	__be32 srvaddr = htonl(INADDR_NONE);
+
+	ROOT_DEV = Root_CIFS;
+
+	if (strlen(line) > 3 && line[0] == '/' && line[1] == '/') {
+		s = strchr(&line[2], '/');
+		if (!s || s[1] == '\0')
+			return 1;
+
+		/* make s point to ',' or '\0' at end of line */
+		s = strchrnul(s, ',');
+		/* len is strlen(unc) + '\0' */
+		len = s - line + 1;
+		if (len > sizeof(root_dev)) {
+			pr_err("Root-CIFS: UNC path too long\n");
+			return 1;
+		}
+		strscpy(root_dev, line, len);
+		srvaddr = parse_srvaddr(&line[2], s);
+		if (*s) {
+			int n = snprintf(root_opts,
+					 sizeof(root_opts), "%s,%s",
+					 DEFAULT_MNT_OPTS, s + 1);
+			if (n >= sizeof(root_opts)) {
+				pr_err("Root-CIFS: mount options string too long\n");
+				root_opts[sizeof(root_opts)-1] = '\0';
+				return 1;
+			}
+		}
+	}
+
+	root_server_addr = srvaddr;
+
+	return 1;
+}
+
+__setup("cifsroot=", cifs_root_setup);
+
+int __init cifs_root_data(char **dev, char **opts)
+{
+	if (!root_dev[0] || root_server_addr == htonl(INADDR_NONE)) {
+		pr_err("Root-CIFS: no SMB server address\n");
+		return -1;
+	}
+
+	*dev = root_dev;
+	*opts = root_opts;
+
+	return 0;
+}
diff --git a/fs/smb/client/cifssmb.c b/fs/smb/client/cifssmb.c
new file mode 100644
index 0000000000..9ee348e6d1
--- /dev/null
+++ b/fs/smb/client/cifssmb.c
@@ -0,0 +1,5879 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *
+ *   Copyright (C) International Business Machines  Corp., 2002,2010
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   Contains the routines for constructing the SMB PDUs themselves
+ *
+ */
+
+ /* SMB/CIFS PDU handling routines here - except for leftovers in connect.c   */
+ /* These are mostly routines that operate on a pathname, or on a tree id     */
+ /* (mounted volume), but there are eight handle based routines which must be */
+ /* treated slightly differently for reconnection purposes since we never     */
+ /* want to reuse a stale file handle and only the caller knows the file info */
+
+#include <linux/fs.h>
+#include <linux/filelock.h>
+#include <linux/kernel.h>
+#include <linux/vfs.h>
+#include <linux/slab.h>
+#include <linux/posix_acl_xattr.h>
+#include <linux/pagemap.h>
+#include <linux/swap.h>
+#include <linux/task_io_accounting_ops.h>
+#include <linux/uaccess.h>
+#include "cifspdu.h"
+#include "cifsfs.h"
+#include "cifsglob.h"
+#include "cifsacl.h"
+#include "cifsproto.h"
+#include "cifs_unicode.h"
+#include "cifs_debug.h"
+#include "fscache.h"
+#include "smbdirect.h"
+#ifdef CONFIG_CIFS_DFS_UPCALL
+#include "dfs_cache.h"
+#endif
+
+#ifdef CONFIG_CIFS_POSIX
+static struct {
+	int index;
+	char *name;
+} protocols[] = {
+	{CIFS_PROT, "\2NT LM 0.12"},
+	{POSIX_PROT, "\2POSIX 2"},
+	{BAD_PROT, "\2"}
+};
+#else
+static struct {
+	int index;
+	char *name;
+} protocols[] = {
+	{CIFS_PROT, "\2NT LM 0.12"},
+	{BAD_PROT, "\2"}
+};
+#endif
+
+/* define the number of elements in the cifs dialect array */
+#ifdef CONFIG_CIFS_POSIX
+#define CIFS_NUM_PROT 2
+#else /* not posix */
+#define CIFS_NUM_PROT 1
+#endif /* CIFS_POSIX */
+
+
+/* reconnect the socket, tcon, and smb session if needed */
+static int
+cifs_reconnect_tcon(struct cifs_tcon *tcon, int smb_command)
+{
+	int rc;
+	struct cifs_ses *ses;
+	struct TCP_Server_Info *server;
+	struct nls_table *nls_codepage = NULL;
+
+	/*
+	 * SMBs NegProt, SessSetup, uLogoff do not have tcon yet so check for
+	 * tcp and smb session status done differently for those three - in the
+	 * calling routine
+	 */
+	if (!tcon)
+		return 0;
+
+	ses = tcon->ses;
+	server = ses->server;
+
+	/*
+	 * only tree disconnect, open, and write, (and ulogoff which does not
+	 * have tcon) are allowed as we start umount
+	 */
+	spin_lock(&tcon->tc_lock);
+	if (tcon->status == TID_EXITING) {
+		if (smb_command != SMB_COM_TREE_DISCONNECT) {
+			spin_unlock(&tcon->tc_lock);
+			cifs_dbg(FYI, "can not send cmd %d while umounting\n",
+				 smb_command);
+			return -ENODEV;
+		}
+	}
+	spin_unlock(&tcon->tc_lock);
+
+again:
+	rc = cifs_wait_for_server_reconnect(server, tcon->retry);
+	if (rc)
+		return rc;
+
+	spin_lock(&ses->chan_lock);
+	if (!cifs_chan_needs_reconnect(ses, server) && !tcon->need_reconnect) {
+		spin_unlock(&ses->chan_lock);
+		return 0;
+	}
+	spin_unlock(&ses->chan_lock);
+
+	mutex_lock(&ses->session_mutex);
+	/*
+	 * Recheck after acquire mutex. If another thread is negotiating
+	 * and the server never sends an answer the socket will be closed
+	 * and tcpStatus set to reconnect.
+	 */
+	spin_lock(&server->srv_lock);
+	if (server->tcpStatus == CifsNeedReconnect) {
+		spin_unlock(&server->srv_lock);
+		mutex_unlock(&ses->session_mutex);
+
+		if (tcon->retry)
+			goto again;
+		rc = -EHOSTDOWN;
+		goto out;
+	}
+	spin_unlock(&server->srv_lock);
+
+	nls_codepage = ses->local_nls;
+
+	/*
+	 * need to prevent multiple threads trying to simultaneously
+	 * reconnect the same SMB session
+	 */
+	spin_lock(&ses->ses_lock);
+	spin_lock(&ses->chan_lock);
+	if (!cifs_chan_needs_reconnect(ses, server) &&
+	    ses->ses_status == SES_GOOD) {
+		spin_unlock(&ses->chan_lock);
+		spin_unlock(&ses->ses_lock);
+
+		/* this means that we only need to tree connect */
+		if (tcon->need_reconnect)
+			goto skip_sess_setup;
+
+		mutex_unlock(&ses->session_mutex);
+		goto out;
+	}
+	spin_unlock(&ses->chan_lock);
+	spin_unlock(&ses->ses_lock);
+
+	rc = cifs_negotiate_protocol(0, ses, server);
+	if (!rc)
+		rc = cifs_setup_session(0, ses, server, nls_codepage);
+
+	/* do we need to reconnect tcon? */
+	if (rc || !tcon->need_reconnect) {
+		mutex_unlock(&ses->session_mutex);
+		goto out;
+	}
+
+skip_sess_setup:
+	cifs_mark_open_files_invalid(tcon);
+	rc = cifs_tree_connect(0, tcon, nls_codepage);
+	mutex_unlock(&ses->session_mutex);
+	cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
+
+	if (rc) {
+		pr_warn_once("reconnect tcon failed rc = %d\n", rc);
+		goto out;
+	}
+
+	atomic_inc(&tconInfoReconnectCount);
+
+	/* tell server Unix caps we support */
+	if (cap_unix(ses))
+		reset_cifs_unix_caps(0, tcon, NULL, NULL);
+
+	/*
+	 * Removed call to reopen open files here. It is safer (and faster) to
+	 * reopen files one at a time as needed in read and write.
+	 *
+	 * FIXME: what about file locks? don't we need to reclaim them ASAP?
+	 */
+
+out:
+	/*
+	 * Check if handle based operation so we know whether we can continue
+	 * or not without returning to caller to reset file handle
+	 */
+	switch (smb_command) {
+	case SMB_COM_READ_ANDX:
+	case SMB_COM_WRITE_ANDX:
+	case SMB_COM_CLOSE:
+	case SMB_COM_FIND_CLOSE2:
+	case SMB_COM_LOCKING_ANDX:
+		rc = -EAGAIN;
+	}
+
+	return rc;
+}
+
+/* Allocate and return pointer to an SMB request buffer, and set basic
+   SMB information in the SMB header.  If the return code is zero, this
+   function must have filled in request_buf pointer */
+static int
+small_smb_init(int smb_command, int wct, struct cifs_tcon *tcon,
+		void **request_buf)
+{
+	int rc;
+
+	rc = cifs_reconnect_tcon(tcon, smb_command);
+	if (rc)
+		return rc;
+
+	*request_buf = cifs_small_buf_get();
+	if (*request_buf == NULL) {
+		/* BB should we add a retry in here if not a writepage? */
+		return -ENOMEM;
+	}
+
+	header_assemble((struct smb_hdr *) *request_buf, smb_command,
+			tcon, wct);
+
+	if (tcon != NULL)
+		cifs_stats_inc(&tcon->num_smbs_sent);
+
+	return 0;
+}
+
+int
+small_smb_init_no_tc(const int smb_command, const int wct,
+		     struct cifs_ses *ses, void **request_buf)
+{
+	int rc;
+	struct smb_hdr *buffer;
+
+	rc = small_smb_init(smb_command, wct, NULL, request_buf);
+	if (rc)
+		return rc;
+
+	buffer = (struct smb_hdr *)*request_buf;
+	buffer->Mid = get_next_mid(ses->server);
+	if (ses->capabilities & CAP_UNICODE)
+		buffer->Flags2 |= SMBFLG2_UNICODE;
+	if (ses->capabilities & CAP_STATUS32)
+		buffer->Flags2 |= SMBFLG2_ERR_STATUS;
+
+	/* uid, tid can stay at zero as set in header assemble */
+
+	/* BB add support for turning on the signing when
+	this function is used after 1st of session setup requests */
+
+	return rc;
+}
+
+/* If the return code is zero, this function must fill in request_buf pointer */
+static int
+__smb_init(int smb_command, int wct, struct cifs_tcon *tcon,
+			void **request_buf, void **response_buf)
+{
+	*request_buf = cifs_buf_get();
+	if (*request_buf == NULL) {
+		/* BB should we add a retry in here if not a writepage? */
+		return -ENOMEM;
+	}
+    /* Although the original thought was we needed the response buf for  */
+    /* potential retries of smb operations it turns out we can determine */
+    /* from the mid flags when the request buffer can be resent without  */
+    /* having to use a second distinct buffer for the response */
+	if (response_buf)
+		*response_buf = *request_buf;
+
+	header_assemble((struct smb_hdr *) *request_buf, smb_command, tcon,
+			wct);
+
+	if (tcon != NULL)
+		cifs_stats_inc(&tcon->num_smbs_sent);
+
+	return 0;
+}
+
+/* If the return code is zero, this function must fill in request_buf pointer */
+static int
+smb_init(int smb_command, int wct, struct cifs_tcon *tcon,
+	 void **request_buf, void **response_buf)
+{
+	int rc;
+
+	rc = cifs_reconnect_tcon(tcon, smb_command);
+	if (rc)
+		return rc;
+
+	return __smb_init(smb_command, wct, tcon, request_buf, response_buf);
+}
+
+static int
+smb_init_no_reconnect(int smb_command, int wct, struct cifs_tcon *tcon,
+			void **request_buf, void **response_buf)
+{
+	spin_lock(&tcon->ses->chan_lock);
+	if (cifs_chan_needs_reconnect(tcon->ses, tcon->ses->server) ||
+	    tcon->need_reconnect) {
+		spin_unlock(&tcon->ses->chan_lock);
+		return -EHOSTDOWN;
+	}
+	spin_unlock(&tcon->ses->chan_lock);
+
+	return __smb_init(smb_command, wct, tcon, request_buf, response_buf);
+}
+
+static int validate_t2(struct smb_t2_rsp *pSMB)
+{
+	unsigned int total_size;
+
+	/* check for plausible wct */
+	if (pSMB->hdr.WordCount < 10)
+		goto vt2_err;
+
+	/* check for parm and data offset going beyond end of smb */
+	if (get_unaligned_le16(&pSMB->t2_rsp.ParameterOffset) > 1024 ||
+	    get_unaligned_le16(&pSMB->t2_rsp.DataOffset) > 1024)
+		goto vt2_err;
+
+	total_size = get_unaligned_le16(&pSMB->t2_rsp.ParameterCount);
+	if (total_size >= 512)
+		goto vt2_err;
+
+	/* check that bcc is at least as big as parms + data, and that it is
+	 * less than negotiated smb buffer
+	 */
+	total_size += get_unaligned_le16(&pSMB->t2_rsp.DataCount);
+	if (total_size > get_bcc(&pSMB->hdr) ||
+	    total_size >= CIFSMaxBufSize + MAX_CIFS_HDR_SIZE)
+		goto vt2_err;
+
+	return 0;
+vt2_err:
+	cifs_dump_mem("Invalid transact2 SMB: ", (char *)pSMB,
+		sizeof(struct smb_t2_rsp) + 16);
+	return -EINVAL;
+}
+
+static int
+decode_ext_sec_blob(struct cifs_ses *ses, NEGOTIATE_RSP *pSMBr)
+{
+	int	rc = 0;
+	u16	count;
+	char	*guid = pSMBr->u.extended_response.GUID;
+	struct TCP_Server_Info *server = ses->server;
+
+	count = get_bcc(&pSMBr->hdr);
+	if (count < SMB1_CLIENT_GUID_SIZE)
+		return -EIO;
+
+	spin_lock(&cifs_tcp_ses_lock);
+	if (server->srv_count > 1) {
+		spin_unlock(&cifs_tcp_ses_lock);
+		if (memcmp(server->server_GUID, guid, SMB1_CLIENT_GUID_SIZE) != 0) {
+			cifs_dbg(FYI, "server UID changed\n");
+			memcpy(server->server_GUID, guid, SMB1_CLIENT_GUID_SIZE);
+		}
+	} else {
+		spin_unlock(&cifs_tcp_ses_lock);
+		memcpy(server->server_GUID, guid, SMB1_CLIENT_GUID_SIZE);
+	}
+
+	if (count == SMB1_CLIENT_GUID_SIZE) {
+		server->sec_ntlmssp = true;
+	} else {
+		count -= SMB1_CLIENT_GUID_SIZE;
+		rc = decode_negTokenInit(
+			pSMBr->u.extended_response.SecurityBlob, count, server);
+		if (rc != 1)
+			return -EINVAL;
+	}
+
+	return 0;
+}
+
+static bool
+should_set_ext_sec_flag(enum securityEnum sectype)
+{
+	switch (sectype) {
+	case RawNTLMSSP:
+	case Kerberos:
+		return true;
+	case Unspecified:
+		if (global_secflags &
+		    (CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP))
+			return true;
+		fallthrough;
+	default:
+		return false;
+	}
+}
+
+int
+CIFSSMBNegotiate(const unsigned int xid,
+		 struct cifs_ses *ses,
+		 struct TCP_Server_Info *server)
+{
+	NEGOTIATE_REQ *pSMB;
+	NEGOTIATE_RSP *pSMBr;
+	int rc = 0;
+	int bytes_returned;
+	int i;
+	u16 count;
+
+	if (!server) {
+		WARN(1, "%s: server is NULL!\n", __func__);
+		return -EIO;
+	}
+
+	rc = smb_init(SMB_COM_NEGOTIATE, 0, NULL /* no tcon yet */ ,
+		      (void **) &pSMB, (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	pSMB->hdr.Mid = get_next_mid(server);
+	pSMB->hdr.Flags2 |= (SMBFLG2_UNICODE | SMBFLG2_ERR_STATUS);
+
+	if (should_set_ext_sec_flag(ses->sectype)) {
+		cifs_dbg(FYI, "Requesting extended security\n");
+		pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
+	}
+
+	count = 0;
+	/*
+	 * We know that all the name entries in the protocols array
+	 * are short (< 16 bytes anyway) and are NUL terminated.
+	 */
+	for (i = 0; i < CIFS_NUM_PROT; i++) {
+		size_t len = strlen(protocols[i].name) + 1;
+
+		memcpy(&pSMB->DialectsArray[count], protocols[i].name, len);
+		count += len;
+	}
+	inc_rfc1001_len(pSMB, count);
+	pSMB->ByteCount = cpu_to_le16(count);
+
+	rc = SendReceive(xid, ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc != 0)
+		goto neg_err_exit;
+
+	server->dialect = le16_to_cpu(pSMBr->DialectIndex);
+	cifs_dbg(FYI, "Dialect: %d\n", server->dialect);
+	/* Check wct = 1 error case */
+	if ((pSMBr->hdr.WordCount <= 13) || (server->dialect == BAD_PROT)) {
+		/* core returns wct = 1, but we do not ask for core - otherwise
+		small wct just comes when dialect index is -1 indicating we
+		could not negotiate a common dialect */
+		rc = -EOPNOTSUPP;
+		goto neg_err_exit;
+	} else if (pSMBr->hdr.WordCount != 17) {
+		/* unknown wct */
+		rc = -EOPNOTSUPP;
+		goto neg_err_exit;
+	}
+	/* else wct == 17, NTLM or better */
+
+	server->sec_mode = pSMBr->SecurityMode;
+	if ((server->sec_mode & SECMODE_USER) == 0)
+		cifs_dbg(FYI, "share mode security\n");
+
+	/* one byte, so no need to convert this or EncryptionKeyLen from
+	   little endian */
+	server->maxReq = min_t(unsigned int, le16_to_cpu(pSMBr->MaxMpxCount),
+			       cifs_max_pending);
+	set_credits(server, server->maxReq);
+	/* probably no need to store and check maxvcs */
+	server->maxBuf = le32_to_cpu(pSMBr->MaxBufferSize);
+	/* set up max_read for readahead check */
+	server->max_read = server->maxBuf;
+	server->max_rw = le32_to_cpu(pSMBr->MaxRawSize);
+	cifs_dbg(NOISY, "Max buf = %d\n", ses->server->maxBuf);
+	server->capabilities = le32_to_cpu(pSMBr->Capabilities);
+	server->timeAdj = (int)(__s16)le16_to_cpu(pSMBr->ServerTimeZone);
+	server->timeAdj *= 60;
+
+	if (pSMBr->EncryptionKeyLength == CIFS_CRYPTO_KEY_SIZE) {
+		server->negflavor = CIFS_NEGFLAVOR_UNENCAP;
+		memcpy(ses->server->cryptkey, pSMBr->u.EncryptionKey,
+		       CIFS_CRYPTO_KEY_SIZE);
+	} else if (pSMBr->hdr.Flags2 & SMBFLG2_EXT_SEC ||
+			server->capabilities & CAP_EXTENDED_SECURITY) {
+		server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
+		rc = decode_ext_sec_blob(ses, pSMBr);
+	} else if (server->sec_mode & SECMODE_PW_ENCRYPT) {
+		rc = -EIO; /* no crypt key only if plain text pwd */
+	} else {
+		server->negflavor = CIFS_NEGFLAVOR_UNENCAP;
+		server->capabilities &= ~CAP_EXTENDED_SECURITY;
+	}
+
+	if (!rc)
+		rc = cifs_enable_signing(server, ses->sign);
+neg_err_exit:
+	cifs_buf_release(pSMB);
+
+	cifs_dbg(FYI, "negprot rc %d\n", rc);
+	return rc;
+}
+
+int
+CIFSSMBTDis(const unsigned int xid, struct cifs_tcon *tcon)
+{
+	struct smb_hdr *smb_buffer;
+	int rc = 0;
+
+	cifs_dbg(FYI, "In tree disconnect\n");
+
+	/* BB: do we need to check this? These should never be NULL. */
+	if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
+		return -EIO;
+
+	/*
+	 * No need to return error on this operation if tid invalidated and
+	 * closed on server already e.g. due to tcp session crashing. Also,
+	 * the tcon is no longer on the list, so no need to take lock before
+	 * checking this.
+	 */
+	spin_lock(&tcon->ses->chan_lock);
+	if ((tcon->need_reconnect) || CIFS_ALL_CHANS_NEED_RECONNECT(tcon->ses)) {
+		spin_unlock(&tcon->ses->chan_lock);
+		return -EIO;
+	}
+	spin_unlock(&tcon->ses->chan_lock);
+
+	rc = small_smb_init(SMB_COM_TREE_DISCONNECT, 0, tcon,
+			    (void **)&smb_buffer);
+	if (rc)
+		return rc;
+
+	rc = SendReceiveNoRsp(xid, tcon->ses, (char *)smb_buffer, 0);
+	cifs_small_buf_release(smb_buffer);
+	if (rc)
+		cifs_dbg(FYI, "Tree disconnect failed %d\n", rc);
+
+	/* No need to return error on this operation if tid invalidated and
+	   closed on server already e.g. due to tcp session crashing */
+	if (rc == -EAGAIN)
+		rc = 0;
+
+	return rc;
+}
+
+/*
+ * This is a no-op for now. We're not really interested in the reply, but
+ * rather in the fact that the server sent one and that server->lstrp
+ * gets updated.
+ *
+ * FIXME: maybe we should consider checking that the reply matches request?
+ */
+static void
+cifs_echo_callback(struct mid_q_entry *mid)
+{
+	struct TCP_Server_Info *server = mid->callback_data;
+	struct cifs_credits credits = { .value = 1, .instance = 0 };
+
+	release_mid(mid);
+	add_credits(server, &credits, CIFS_ECHO_OP);
+}
+
+int
+CIFSSMBEcho(struct TCP_Server_Info *server)
+{
+	ECHO_REQ *smb;
+	int rc = 0;
+	struct kvec iov[2];
+	struct smb_rqst rqst = { .rq_iov = iov,
+				 .rq_nvec = 2 };
+
+	cifs_dbg(FYI, "In echo request\n");
+
+	rc = small_smb_init(SMB_COM_ECHO, 0, NULL, (void **)&smb);
+	if (rc)
+		return rc;
+
+	if (server->capabilities & CAP_UNICODE)
+		smb->hdr.Flags2 |= SMBFLG2_UNICODE;
+
+	/* set up echo request */
+	smb->hdr.Tid = 0xffff;
+	smb->hdr.WordCount = 1;
+	put_unaligned_le16(1, &smb->EchoCount);
+	put_bcc(1, &smb->hdr);
+	smb->Data[0] = 'a';
+	inc_rfc1001_len(smb, 3);
+
+	iov[0].iov_len = 4;
+	iov[0].iov_base = smb;
+	iov[1].iov_len = get_rfc1002_length(smb);
+	iov[1].iov_base = (char *)smb + 4;
+
+	rc = cifs_call_async(server, &rqst, NULL, cifs_echo_callback, NULL,
+			     server, CIFS_NON_BLOCKING | CIFS_ECHO_OP, NULL);
+	if (rc)
+		cifs_dbg(FYI, "Echo request failed: %d\n", rc);
+
+	cifs_small_buf_release(smb);
+
+	return rc;
+}
+
+int
+CIFSSMBLogoff(const unsigned int xid, struct cifs_ses *ses)
+{
+	LOGOFF_ANDX_REQ *pSMB;
+	int rc = 0;
+
+	cifs_dbg(FYI, "In SMBLogoff for session disconnect\n");
+
+	/*
+	 * BB: do we need to check validity of ses and server? They should
+	 * always be valid since we have an active reference. If not, that
+	 * should probably be a BUG()
+	 */
+	if (!ses || !ses->server)
+		return -EIO;
+
+	mutex_lock(&ses->session_mutex);
+	spin_lock(&ses->chan_lock);
+	if (CIFS_ALL_CHANS_NEED_RECONNECT(ses)) {
+		spin_unlock(&ses->chan_lock);
+		goto session_already_dead; /* no need to send SMBlogoff if uid
+					      already closed due to reconnect */
+	}
+	spin_unlock(&ses->chan_lock);
+
+	rc = small_smb_init(SMB_COM_LOGOFF_ANDX, 2, NULL, (void **)&pSMB);
+	if (rc) {
+		mutex_unlock(&ses->session_mutex);
+		return rc;
+	}
+
+	pSMB->hdr.Mid = get_next_mid(ses->server);
+
+	if (ses->server->sign)
+		pSMB->hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
+
+	pSMB->hdr.Uid = ses->Suid;
+
+	pSMB->AndXCommand = 0xFF;
+	rc = SendReceiveNoRsp(xid, ses, (char *) pSMB, 0);
+	cifs_small_buf_release(pSMB);
+session_already_dead:
+	mutex_unlock(&ses->session_mutex);
+
+	/* if session dead then we do not need to do ulogoff,
+		since server closed smb session, no sense reporting
+		error */
+	if (rc == -EAGAIN)
+		rc = 0;
+	return rc;
+}
+
+int
+CIFSPOSIXDelFile(const unsigned int xid, struct cifs_tcon *tcon,
+		 const char *fileName, __u16 type,
+		 const struct nls_table *nls_codepage, int remap)
+{
+	TRANSACTION2_SPI_REQ *pSMB = NULL;
+	TRANSACTION2_SPI_RSP *pSMBr = NULL;
+	struct unlink_psx_rq *pRqD;
+	int name_len;
+	int rc = 0;
+	int bytes_returned = 0;
+	__u16 params, param_offset, offset, byte_count;
+
+	cifs_dbg(FYI, "In POSIX delete\n");
+PsxDelete:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len =
+		    cifsConvertToUTF16((__le16 *) pSMB->FileName, fileName,
+				       PATH_MAX, nls_codepage, remap);
+		name_len++;	/* trailing null */
+		name_len *= 2;
+	} else {
+		name_len = copy_path_name(pSMB->FileName, fileName);
+	}
+
+	params = 6 + name_len;
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	pSMB->MaxDataCount = 0; /* BB double check this with jra */
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	param_offset = offsetof(struct smb_com_transaction2_spi_req,
+				InformationLevel) - 4;
+	offset = param_offset + params;
+
+	/* Setup pointer to Request Data (inode type).
+	 * Note that SMB offsets are from the beginning of SMB which is 4 bytes
+	 * in, after RFC1001 field
+	 */
+	pRqD = (struct unlink_psx_rq *)((char *)(pSMB) + offset + 4);
+	pRqD->type = cpu_to_le16(type);
+	pSMB->ParameterOffset = cpu_to_le16(param_offset);
+	pSMB->DataOffset = cpu_to_le16(offset);
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
+	byte_count = 3 /* pad */  + params + sizeof(struct unlink_psx_rq);
+
+	pSMB->DataCount = cpu_to_le16(sizeof(struct unlink_psx_rq));
+	pSMB->TotalDataCount = cpu_to_le16(sizeof(struct unlink_psx_rq));
+	pSMB->ParameterCount = cpu_to_le16(params);
+	pSMB->TotalParameterCount = pSMB->ParameterCount;
+	pSMB->InformationLevel = cpu_to_le16(SMB_POSIX_UNLINK);
+	pSMB->Reserved4 = 0;
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc)
+		cifs_dbg(FYI, "Posix delete returned %d\n", rc);
+	cifs_buf_release(pSMB);
+
+	cifs_stats_inc(&tcon->stats.cifs_stats.num_deletes);
+
+	if (rc == -EAGAIN)
+		goto PsxDelete;
+
+	return rc;
+}
+
+int
+CIFSSMBDelFile(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
+	       struct cifs_sb_info *cifs_sb)
+{
+	DELETE_FILE_REQ *pSMB = NULL;
+	DELETE_FILE_RSP *pSMBr = NULL;
+	int rc = 0;
+	int bytes_returned;
+	int name_len;
+	int remap = cifs_remap(cifs_sb);
+
+DelFileRetry:
+	rc = smb_init(SMB_COM_DELETE, 1, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len = cifsConvertToUTF16((__le16 *) pSMB->fileName, name,
+					      PATH_MAX, cifs_sb->local_nls,
+					      remap);
+		name_len++;	/* trailing null */
+		name_len *= 2;
+	} else {
+		name_len = copy_path_name(pSMB->fileName, name);
+	}
+	pSMB->SearchAttributes =
+	    cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM);
+	pSMB->BufferFormat = 0x04;
+	inc_rfc1001_len(pSMB, name_len + 1);
+	pSMB->ByteCount = cpu_to_le16(name_len + 1);
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	cifs_stats_inc(&tcon->stats.cifs_stats.num_deletes);
+	if (rc)
+		cifs_dbg(FYI, "Error in RMFile = %d\n", rc);
+
+	cifs_buf_release(pSMB);
+	if (rc == -EAGAIN)
+		goto DelFileRetry;
+
+	return rc;
+}
+
+int
+CIFSSMBRmDir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
+	     struct cifs_sb_info *cifs_sb)
+{
+	DELETE_DIRECTORY_REQ *pSMB = NULL;
+	DELETE_DIRECTORY_RSP *pSMBr = NULL;
+	int rc = 0;
+	int bytes_returned;
+	int name_len;
+	int remap = cifs_remap(cifs_sb);
+
+	cifs_dbg(FYI, "In CIFSSMBRmDir\n");
+RmDirRetry:
+	rc = smb_init(SMB_COM_DELETE_DIRECTORY, 0, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len = cifsConvertToUTF16((__le16 *) pSMB->DirName, name,
+					      PATH_MAX, cifs_sb->local_nls,
+					      remap);
+		name_len++;	/* trailing null */
+		name_len *= 2;
+	} else {
+		name_len = copy_path_name(pSMB->DirName, name);
+	}
+
+	pSMB->BufferFormat = 0x04;
+	inc_rfc1001_len(pSMB, name_len + 1);
+	pSMB->ByteCount = cpu_to_le16(name_len + 1);
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	cifs_stats_inc(&tcon->stats.cifs_stats.num_rmdirs);
+	if (rc)
+		cifs_dbg(FYI, "Error in RMDir = %d\n", rc);
+
+	cifs_buf_release(pSMB);
+	if (rc == -EAGAIN)
+		goto RmDirRetry;
+	return rc;
+}
+
+int
+CIFSSMBMkDir(const unsigned int xid, struct inode *inode, umode_t mode,
+	     struct cifs_tcon *tcon, const char *name,
+	     struct cifs_sb_info *cifs_sb)
+{
+	int rc = 0;
+	CREATE_DIRECTORY_REQ *pSMB = NULL;
+	CREATE_DIRECTORY_RSP *pSMBr = NULL;
+	int bytes_returned;
+	int name_len;
+	int remap = cifs_remap(cifs_sb);
+
+	cifs_dbg(FYI, "In CIFSSMBMkDir\n");
+MkDirRetry:
+	rc = smb_init(SMB_COM_CREATE_DIRECTORY, 0, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len = cifsConvertToUTF16((__le16 *) pSMB->DirName, name,
+					      PATH_MAX, cifs_sb->local_nls,
+					      remap);
+		name_len++;	/* trailing null */
+		name_len *= 2;
+	} else {
+		name_len = copy_path_name(pSMB->DirName, name);
+	}
+
+	pSMB->BufferFormat = 0x04;
+	inc_rfc1001_len(pSMB, name_len + 1);
+	pSMB->ByteCount = cpu_to_le16(name_len + 1);
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	cifs_stats_inc(&tcon->stats.cifs_stats.num_mkdirs);
+	if (rc)
+		cifs_dbg(FYI, "Error in Mkdir = %d\n", rc);
+
+	cifs_buf_release(pSMB);
+	if (rc == -EAGAIN)
+		goto MkDirRetry;
+	return rc;
+}
+
+int
+CIFSPOSIXCreate(const unsigned int xid, struct cifs_tcon *tcon,
+		__u32 posix_flags, __u64 mode, __u16 *netfid,
+		FILE_UNIX_BASIC_INFO *pRetData, __u32 *pOplock,
+		const char *name, const struct nls_table *nls_codepage,
+		int remap)
+{
+	TRANSACTION2_SPI_REQ *pSMB = NULL;
+	TRANSACTION2_SPI_RSP *pSMBr = NULL;
+	int name_len;
+	int rc = 0;
+	int bytes_returned = 0;
+	__u16 params, param_offset, offset, byte_count, count;
+	OPEN_PSX_REQ *pdata;
+	OPEN_PSX_RSP *psx_rsp;
+
+	cifs_dbg(FYI, "In POSIX Create\n");
+PsxCreat:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len =
+		    cifsConvertToUTF16((__le16 *) pSMB->FileName, name,
+				       PATH_MAX, nls_codepage, remap);
+		name_len++;	/* trailing null */
+		name_len *= 2;
+	} else {
+		name_len = copy_path_name(pSMB->FileName, name);
+	}
+
+	params = 6 + name_len;
+	count = sizeof(OPEN_PSX_REQ);
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	pSMB->MaxDataCount = cpu_to_le16(1000);	/* large enough */
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	param_offset = offsetof(struct smb_com_transaction2_spi_req,
+				InformationLevel) - 4;
+	offset = param_offset + params;
+	/* SMB offsets are from the beginning of SMB which is 4 bytes in, after RFC1001 field */
+	pdata = (OPEN_PSX_REQ *)((char *)(pSMB) + offset + 4);
+	pdata->Level = cpu_to_le16(SMB_QUERY_FILE_UNIX_BASIC);
+	pdata->Permissions = cpu_to_le64(mode);
+	pdata->PosixOpenFlags = cpu_to_le32(posix_flags);
+	pdata->OpenFlags =  cpu_to_le32(*pOplock);
+	pSMB->ParameterOffset = cpu_to_le16(param_offset);
+	pSMB->DataOffset = cpu_to_le16(offset);
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
+	byte_count = 3 /* pad */  + params + count;
+
+	pSMB->DataCount = cpu_to_le16(count);
+	pSMB->ParameterCount = cpu_to_le16(params);
+	pSMB->TotalDataCount = pSMB->DataCount;
+	pSMB->TotalParameterCount = pSMB->ParameterCount;
+	pSMB->InformationLevel = cpu_to_le16(SMB_POSIX_OPEN);
+	pSMB->Reserved4 = 0;
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc) {
+		cifs_dbg(FYI, "Posix create returned %d\n", rc);
+		goto psx_create_err;
+	}
+
+	cifs_dbg(FYI, "copying inode info\n");
+	rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+	if (rc || get_bcc(&pSMBr->hdr) < sizeof(OPEN_PSX_RSP)) {
+		rc = -EIO;	/* bad smb */
+		goto psx_create_err;
+	}
+
+	/* copy return information to pRetData */
+	psx_rsp = (OPEN_PSX_RSP *)((char *) &pSMBr->hdr.Protocol
+			+ le16_to_cpu(pSMBr->t2.DataOffset));
+
+	*pOplock = le16_to_cpu(psx_rsp->OplockFlags);
+	if (netfid)
+		*netfid = psx_rsp->Fid;   /* cifs fid stays in le */
+	/* Let caller know file was created so we can set the mode. */
+	/* Do we care about the CreateAction in any other cases? */
+	if (cpu_to_le32(FILE_CREATE) == psx_rsp->CreateAction)
+		*pOplock |= CIFS_CREATE_ACTION;
+	/* check to make sure response data is there */
+	if (psx_rsp->ReturnedLevel != cpu_to_le16(SMB_QUERY_FILE_UNIX_BASIC)) {
+		pRetData->Type = cpu_to_le32(-1); /* unknown */
+		cifs_dbg(NOISY, "unknown type\n");
+	} else {
+		if (get_bcc(&pSMBr->hdr) < sizeof(OPEN_PSX_RSP)
+					+ sizeof(FILE_UNIX_BASIC_INFO)) {
+			cifs_dbg(VFS, "Open response data too small\n");
+			pRetData->Type = cpu_to_le32(-1);
+			goto psx_create_err;
+		}
+		memcpy((char *) pRetData,
+			(char *)psx_rsp + sizeof(OPEN_PSX_RSP),
+			sizeof(FILE_UNIX_BASIC_INFO));
+	}
+
+psx_create_err:
+	cifs_buf_release(pSMB);
+
+	if (posix_flags & SMB_O_DIRECTORY)
+		cifs_stats_inc(&tcon->stats.cifs_stats.num_posixmkdirs);
+	else
+		cifs_stats_inc(&tcon->stats.cifs_stats.num_posixopens);
+
+	if (rc == -EAGAIN)
+		goto PsxCreat;
+
+	return rc;
+}
+
+static __u16 convert_disposition(int disposition)
+{
+	__u16 ofun = 0;
+
+	switch (disposition) {
+		case FILE_SUPERSEDE:
+			ofun = SMBOPEN_OCREATE | SMBOPEN_OTRUNC;
+			break;
+		case FILE_OPEN:
+			ofun = SMBOPEN_OAPPEND;
+			break;
+		case FILE_CREATE:
+			ofun = SMBOPEN_OCREATE;
+			break;
+		case FILE_OPEN_IF:
+			ofun = SMBOPEN_OCREATE | SMBOPEN_OAPPEND;
+			break;
+		case FILE_OVERWRITE:
+			ofun = SMBOPEN_OTRUNC;
+			break;
+		case FILE_OVERWRITE_IF:
+			ofun = SMBOPEN_OCREATE | SMBOPEN_OTRUNC;
+			break;
+		default:
+			cifs_dbg(FYI, "unknown disposition %d\n", disposition);
+			ofun =  SMBOPEN_OAPPEND; /* regular open */
+	}
+	return ofun;
+}
+
+static int
+access_flags_to_smbopen_mode(const int access_flags)
+{
+	int masked_flags = access_flags & (GENERIC_READ | GENERIC_WRITE);
+
+	if (masked_flags == GENERIC_READ)
+		return SMBOPEN_READ;
+	else if (masked_flags == GENERIC_WRITE)
+		return SMBOPEN_WRITE;
+
+	/* just go for read/write */
+	return SMBOPEN_READWRITE;
+}
+
+int
+SMBLegacyOpen(const unsigned int xid, struct cifs_tcon *tcon,
+	    const char *fileName, const int openDisposition,
+	    const int access_flags, const int create_options, __u16 *netfid,
+	    int *pOplock, FILE_ALL_INFO *pfile_info,
+	    const struct nls_table *nls_codepage, int remap)
+{
+	int rc;
+	OPENX_REQ *pSMB = NULL;
+	OPENX_RSP *pSMBr = NULL;
+	int bytes_returned;
+	int name_len;
+	__u16 count;
+
+OldOpenRetry:
+	rc = smb_init(SMB_COM_OPEN_ANDX, 15, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	pSMB->AndXCommand = 0xFF;       /* none */
+
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		count = 1;      /* account for one byte pad to word boundary */
+		name_len =
+		   cifsConvertToUTF16((__le16 *) (pSMB->fileName + 1),
+				      fileName, PATH_MAX, nls_codepage, remap);
+		name_len++;     /* trailing null */
+		name_len *= 2;
+	} else {
+		count = 0;      /* no pad */
+		name_len = copy_path_name(pSMB->fileName, fileName);
+	}
+	if (*pOplock & REQ_OPLOCK)
+		pSMB->OpenFlags = cpu_to_le16(REQ_OPLOCK);
+	else if (*pOplock & REQ_BATCHOPLOCK)
+		pSMB->OpenFlags = cpu_to_le16(REQ_BATCHOPLOCK);
+
+	pSMB->OpenFlags |= cpu_to_le16(REQ_MORE_INFO);
+	pSMB->Mode = cpu_to_le16(access_flags_to_smbopen_mode(access_flags));
+	pSMB->Mode |= cpu_to_le16(0x40); /* deny none */
+	/* set file as system file if special file such
+	   as fifo and server expecting SFU style and
+	   no Unix extensions */
+
+	if (create_options & CREATE_OPTION_SPECIAL)
+		pSMB->FileAttributes = cpu_to_le16(ATTR_SYSTEM);
+	else /* BB FIXME BB */
+		pSMB->FileAttributes = cpu_to_le16(0/*ATTR_NORMAL*/);
+
+	if (create_options & CREATE_OPTION_READONLY)
+		pSMB->FileAttributes |= cpu_to_le16(ATTR_READONLY);
+
+	/* BB FIXME BB */
+/*	pSMB->CreateOptions = cpu_to_le32(create_options &
+						 CREATE_OPTIONS_MASK); */
+	/* BB FIXME END BB */
+
+	pSMB->Sattr = cpu_to_le16(ATTR_HIDDEN | ATTR_SYSTEM | ATTR_DIRECTORY);
+	pSMB->OpenFunction = cpu_to_le16(convert_disposition(openDisposition));
+	count += name_len;
+	inc_rfc1001_len(pSMB, count);
+
+	pSMB->ByteCount = cpu_to_le16(count);
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			(struct smb_hdr *)pSMBr, &bytes_returned, 0);
+	cifs_stats_inc(&tcon->stats.cifs_stats.num_opens);
+	if (rc) {
+		cifs_dbg(FYI, "Error in Open = %d\n", rc);
+	} else {
+	/* BB verify if wct == 15 */
+
+/*		*pOplock = pSMBr->OplockLevel; */ /* BB take from action field*/
+
+		*netfid = pSMBr->Fid;   /* cifs fid stays in le */
+		/* Let caller know file was created so we can set the mode. */
+		/* Do we care about the CreateAction in any other cases? */
+	/* BB FIXME BB */
+/*		if (cpu_to_le32(FILE_CREATE) == pSMBr->CreateAction)
+			*pOplock |= CIFS_CREATE_ACTION; */
+	/* BB FIXME END */
+
+		if (pfile_info) {
+			pfile_info->CreationTime = 0; /* BB convert CreateTime*/
+			pfile_info->LastAccessTime = 0; /* BB fixme */
+			pfile_info->LastWriteTime = 0; /* BB fixme */
+			pfile_info->ChangeTime = 0;  /* BB fixme */
+			pfile_info->Attributes =
+				cpu_to_le32(le16_to_cpu(pSMBr->FileAttributes));
+			/* the file_info buf is endian converted by caller */
+			pfile_info->AllocationSize =
+				cpu_to_le64(le32_to_cpu(pSMBr->EndOfFile));
+			pfile_info->EndOfFile = pfile_info->AllocationSize;
+			pfile_info->NumberOfLinks = cpu_to_le32(1);
+			pfile_info->DeletePending = 0;
+		}
+	}
+
+	cifs_buf_release(pSMB);
+	if (rc == -EAGAIN)
+		goto OldOpenRetry;
+	return rc;
+}
+
+int
+CIFS_open(const unsigned int xid, struct cifs_open_parms *oparms, int *oplock,
+	  FILE_ALL_INFO *buf)
+{
+	int rc;
+	OPEN_REQ *req = NULL;
+	OPEN_RSP *rsp = NULL;
+	int bytes_returned;
+	int name_len;
+	__u16 count;
+	struct cifs_sb_info *cifs_sb = oparms->cifs_sb;
+	struct cifs_tcon *tcon = oparms->tcon;
+	int remap = cifs_remap(cifs_sb);
+	const struct nls_table *nls = cifs_sb->local_nls;
+	int create_options = oparms->create_options;
+	int desired_access = oparms->desired_access;
+	int disposition = oparms->disposition;
+	const char *path = oparms->path;
+
+openRetry:
+	rc = smb_init(SMB_COM_NT_CREATE_ANDX, 24, tcon, (void **)&req,
+		      (void **)&rsp);
+	if (rc)
+		return rc;
+
+	/* no commands go after this */
+	req->AndXCommand = 0xFF;
+
+	if (req->hdr.Flags2 & SMBFLG2_UNICODE) {
+		/* account for one byte pad to word boundary */
+		count = 1;
+		name_len = cifsConvertToUTF16((__le16 *)(req->fileName + 1),
+					      path, PATH_MAX, nls, remap);
+		/* trailing null */
+		name_len++;
+		name_len *= 2;
+		req->NameLength = cpu_to_le16(name_len);
+	} else {
+		/* BB improve check for buffer overruns BB */
+		/* no pad */
+		count = 0;
+		name_len = copy_path_name(req->fileName, path);
+		req->NameLength = cpu_to_le16(name_len);
+	}
+
+	if (*oplock & REQ_OPLOCK)
+		req->OpenFlags = cpu_to_le32(REQ_OPLOCK);
+	else if (*oplock & REQ_BATCHOPLOCK)
+		req->OpenFlags = cpu_to_le32(REQ_BATCHOPLOCK);
+
+	req->DesiredAccess = cpu_to_le32(desired_access);
+	req->AllocationSize = 0;
+
+	/*
+	 * Set file as system file if special file such as fifo and server
+	 * expecting SFU style and no Unix extensions.
+	 */
+	if (create_options & CREATE_OPTION_SPECIAL)
+		req->FileAttributes = cpu_to_le32(ATTR_SYSTEM);
+	else
+		req->FileAttributes = cpu_to_le32(ATTR_NORMAL);
+
+	/*
+	 * XP does not handle ATTR_POSIX_SEMANTICS but it helps speed up case
+	 * sensitive checks for other servers such as Samba.
+	 */
+	if (tcon->ses->capabilities & CAP_UNIX)
+		req->FileAttributes |= cpu_to_le32(ATTR_POSIX_SEMANTICS);
+
+	if (create_options & CREATE_OPTION_READONLY)
+		req->FileAttributes |= cpu_to_le32(ATTR_READONLY);
+
+	req->ShareAccess = cpu_to_le32(FILE_SHARE_ALL);
+	req->CreateDisposition = cpu_to_le32(disposition);
+	req->CreateOptions = cpu_to_le32(create_options & CREATE_OPTIONS_MASK);
+
+	/* BB Expirement with various impersonation levels and verify */
+	req->ImpersonationLevel = cpu_to_le32(SECURITY_IMPERSONATION);
+	req->SecurityFlags = SECURITY_CONTEXT_TRACKING|SECURITY_EFFECTIVE_ONLY;
+
+	count += name_len;
+	inc_rfc1001_len(req, count);
+
+	req->ByteCount = cpu_to_le16(count);
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *)req,
+			 (struct smb_hdr *)rsp, &bytes_returned, 0);
+	cifs_stats_inc(&tcon->stats.cifs_stats.num_opens);
+	if (rc) {
+		cifs_dbg(FYI, "Error in Open = %d\n", rc);
+		cifs_buf_release(req);
+		if (rc == -EAGAIN)
+			goto openRetry;
+		return rc;
+	}
+
+	/* 1 byte no need to le_to_cpu */
+	*oplock = rsp->OplockLevel;
+	/* cifs fid stays in le */
+	oparms->fid->netfid = rsp->Fid;
+	oparms->fid->access = desired_access;
+
+	/* Let caller know file was created so we can set the mode. */
+	/* Do we care about the CreateAction in any other cases? */
+	if (cpu_to_le32(FILE_CREATE) == rsp->CreateAction)
+		*oplock |= CIFS_CREATE_ACTION;
+
+	if (buf) {
+		/* copy commonly used attributes */
+		memcpy(&buf->common_attributes,
+		       &rsp->common_attributes,
+		       sizeof(buf->common_attributes));
+		/* the file_info buf is endian converted by caller */
+		buf->AllocationSize = rsp->AllocationSize;
+		buf->EndOfFile = rsp->EndOfFile;
+		buf->NumberOfLinks = cpu_to_le32(1);
+		buf->DeletePending = 0;
+	}
+
+	cifs_buf_release(req);
+	return rc;
+}
+
+static void
+cifs_readv_callback(struct mid_q_entry *mid)
+{
+	struct cifs_readdata *rdata = mid->callback_data;
+	struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
+	struct TCP_Server_Info *server = tcon->ses->server;
+	struct smb_rqst rqst = { .rq_iov = rdata->iov,
+				 .rq_nvec = 2,
+				 .rq_iter_size = iov_iter_count(&rdata->iter),
+				 .rq_iter = rdata->iter };
+	struct cifs_credits credits = { .value = 1, .instance = 0 };
+
+	cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
+		 __func__, mid->mid, mid->mid_state, rdata->result,
+		 rdata->bytes);
+
+	switch (mid->mid_state) {
+	case MID_RESPONSE_RECEIVED:
+		/* result already set, check signature */
+		if (server->sign) {
+			int rc = 0;
+
+			rc = cifs_verify_signature(&rqst, server,
+						  mid->sequence_number);
+			if (rc)
+				cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
+					 rc);
+		}
+		/* FIXME: should this be counted toward the initiating task? */
+		task_io_account_read(rdata->got_bytes);
+		cifs_stats_bytes_read(tcon, rdata->got_bytes);
+		break;
+	case MID_REQUEST_SUBMITTED:
+	case MID_RETRY_NEEDED:
+		rdata->result = -EAGAIN;
+		if (server->sign && rdata->got_bytes)
+			/* reset bytes number since we can not check a sign */
+			rdata->got_bytes = 0;
+		/* FIXME: should this be counted toward the initiating task? */
+		task_io_account_read(rdata->got_bytes);
+		cifs_stats_bytes_read(tcon, rdata->got_bytes);
+		break;
+	default:
+		rdata->result = -EIO;
+	}
+
+	queue_work(cifsiod_wq, &rdata->work);
+	release_mid(mid);
+	add_credits(server, &credits, 0);
+}
+
+/* cifs_async_readv - send an async write, and set up mid to handle result */
+int
+cifs_async_readv(struct cifs_readdata *rdata)
+{
+	int rc;
+	READ_REQ *smb = NULL;
+	int wct;
+	struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
+	struct smb_rqst rqst = { .rq_iov = rdata->iov,
+				 .rq_nvec = 2 };
+
+	cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
+		 __func__, rdata->offset, rdata->bytes);
+
+	if (tcon->ses->capabilities & CAP_LARGE_FILES)
+		wct = 12;
+	else {
+		wct = 10; /* old style read */
+		if ((rdata->offset >> 32) > 0)  {
+			/* can not handle this big offset for old */
+			return -EIO;
+		}
+	}
+
+	rc = small_smb_init(SMB_COM_READ_ANDX, wct, tcon, (void **)&smb);
+	if (rc)
+		return rc;
+
+	smb->hdr.Pid = cpu_to_le16((__u16)rdata->pid);
+	smb->hdr.PidHigh = cpu_to_le16((__u16)(rdata->pid >> 16));
+
+	smb->AndXCommand = 0xFF;	/* none */
+	smb->Fid = rdata->cfile->fid.netfid;
+	smb->OffsetLow = cpu_to_le32(rdata->offset & 0xFFFFFFFF);
+	if (wct == 12)
+		smb->OffsetHigh = cpu_to_le32(rdata->offset >> 32);
+	smb->Remaining = 0;
+	smb->MaxCount = cpu_to_le16(rdata->bytes & 0xFFFF);
+	smb->MaxCountHigh = cpu_to_le32(rdata->bytes >> 16);
+	if (wct == 12)
+		smb->ByteCount = 0;
+	else {
+		/* old style read */
+		struct smb_com_readx_req *smbr =
+			(struct smb_com_readx_req *)smb;
+		smbr->ByteCount = 0;
+	}
+
+	/* 4 for RFC1001 length + 1 for BCC */
+	rdata->iov[0].iov_base = smb;
+	rdata->iov[0].iov_len = 4;
+	rdata->iov[1].iov_base = (char *)smb + 4;
+	rdata->iov[1].iov_len = get_rfc1002_length(smb);
+
+	kref_get(&rdata->refcount);
+	rc = cifs_call_async(tcon->ses->server, &rqst, cifs_readv_receive,
+			     cifs_readv_callback, NULL, rdata, 0, NULL);
+
+	if (rc == 0)
+		cifs_stats_inc(&tcon->stats.cifs_stats.num_reads);
+	else
+		kref_put(&rdata->refcount, cifs_readdata_release);
+
+	cifs_small_buf_release(smb);
+	return rc;
+}
+
+int
+CIFSSMBRead(const unsigned int xid, struct cifs_io_parms *io_parms,
+	    unsigned int *nbytes, char **buf, int *pbuf_type)
+{
+	int rc = -EACCES;
+	READ_REQ *pSMB = NULL;
+	READ_RSP *pSMBr = NULL;
+	char *pReadData = NULL;
+	int wct;
+	int resp_buf_type = 0;
+	struct kvec iov[1];
+	struct kvec rsp_iov;
+	__u32 pid = io_parms->pid;
+	__u16 netfid = io_parms->netfid;
+	__u64 offset = io_parms->offset;
+	struct cifs_tcon *tcon = io_parms->tcon;
+	unsigned int count = io_parms->length;
+
+	cifs_dbg(FYI, "Reading %d bytes on fid %d\n", count, netfid);
+	if (tcon->ses->capabilities & CAP_LARGE_FILES)
+		wct = 12;
+	else {
+		wct = 10; /* old style read */
+		if ((offset >> 32) > 0)  {
+			/* can not handle this big offset for old */
+			return -EIO;
+		}
+	}
+
+	*nbytes = 0;
+	rc = small_smb_init(SMB_COM_READ_ANDX, wct, tcon, (void **) &pSMB);
+	if (rc)
+		return rc;
+
+	pSMB->hdr.Pid = cpu_to_le16((__u16)pid);
+	pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid >> 16));
+
+	/* tcon and ses pointer are checked in smb_init */
+	if (tcon->ses->server == NULL)
+		return -ECONNABORTED;
+
+	pSMB->AndXCommand = 0xFF;       /* none */
+	pSMB->Fid = netfid;
+	pSMB->OffsetLow = cpu_to_le32(offset & 0xFFFFFFFF);
+	if (wct == 12)
+		pSMB->OffsetHigh = cpu_to_le32(offset >> 32);
+
+	pSMB->Remaining = 0;
+	pSMB->MaxCount = cpu_to_le16(count & 0xFFFF);
+	pSMB->MaxCountHigh = cpu_to_le32(count >> 16);
+	if (wct == 12)
+		pSMB->ByteCount = 0;  /* no need to do le conversion since 0 */
+	else {
+		/* old style read */
+		struct smb_com_readx_req *pSMBW =
+			(struct smb_com_readx_req *)pSMB;
+		pSMBW->ByteCount = 0;
+	}
+
+	iov[0].iov_base = (char *)pSMB;
+	iov[0].iov_len = be32_to_cpu(pSMB->hdr.smb_buf_length) + 4;
+	rc = SendReceive2(xid, tcon->ses, iov, 1, &resp_buf_type,
+			  CIFS_LOG_ERROR, &rsp_iov);
+	cifs_small_buf_release(pSMB);
+	cifs_stats_inc(&tcon->stats.cifs_stats.num_reads);
+	pSMBr = (READ_RSP *)rsp_iov.iov_base;
+	if (rc) {
+		cifs_dbg(VFS, "Send error in read = %d\n", rc);
+	} else {
+		int data_length = le16_to_cpu(pSMBr->DataLengthHigh);
+		data_length = data_length << 16;
+		data_length += le16_to_cpu(pSMBr->DataLength);
+		*nbytes = data_length;
+
+		/*check that DataLength would not go beyond end of SMB */
+		if ((data_length > CIFSMaxBufSize)
+				|| (data_length > count)) {
+			cifs_dbg(FYI, "bad length %d for count %d\n",
+				 data_length, count);
+			rc = -EIO;
+			*nbytes = 0;
+		} else {
+			pReadData = (char *) (&pSMBr->hdr.Protocol) +
+					le16_to_cpu(pSMBr->DataOffset);
+/*			if (rc = copy_to_user(buf, pReadData, data_length)) {
+				cifs_dbg(VFS, "Faulting on read rc = %d\n",rc);
+				rc = -EFAULT;
+			}*/ /* can not use copy_to_user when using page cache*/
+			if (*buf)
+				memcpy(*buf, pReadData, data_length);
+		}
+	}
+
+	if (*buf) {
+		free_rsp_buf(resp_buf_type, rsp_iov.iov_base);
+	} else if (resp_buf_type != CIFS_NO_BUFFER) {
+		/* return buffer to caller to free */
+		*buf = rsp_iov.iov_base;
+		if (resp_buf_type == CIFS_SMALL_BUFFER)
+			*pbuf_type = CIFS_SMALL_BUFFER;
+		else if (resp_buf_type == CIFS_LARGE_BUFFER)
+			*pbuf_type = CIFS_LARGE_BUFFER;
+	} /* else no valid buffer on return - leave as null */
+
+	/* Note: On -EAGAIN error only caller can retry on handle based calls
+		since file handle passed in no longer valid */
+	return rc;
+}
+
+
+int
+CIFSSMBWrite(const unsigned int xid, struct cifs_io_parms *io_parms,
+	     unsigned int *nbytes, const char *buf)
+{
+	int rc = -EACCES;
+	WRITE_REQ *pSMB = NULL;
+	WRITE_RSP *pSMBr = NULL;
+	int bytes_returned, wct;
+	__u32 bytes_sent;
+	__u16 byte_count;
+	__u32 pid = io_parms->pid;
+	__u16 netfid = io_parms->netfid;
+	__u64 offset = io_parms->offset;
+	struct cifs_tcon *tcon = io_parms->tcon;
+	unsigned int count = io_parms->length;
+
+	*nbytes = 0;
+
+	/* cifs_dbg(FYI, "write at %lld %d bytes\n", offset, count);*/
+	if (tcon->ses == NULL)
+		return -ECONNABORTED;
+
+	if (tcon->ses->capabilities & CAP_LARGE_FILES)
+		wct = 14;
+	else {
+		wct = 12;
+		if ((offset >> 32) > 0) {
+			/* can not handle big offset for old srv */
+			return -EIO;
+		}
+	}
+
+	rc = smb_init(SMB_COM_WRITE_ANDX, wct, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	pSMB->hdr.Pid = cpu_to_le16((__u16)pid);
+	pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid >> 16));
+
+	/* tcon and ses pointer are checked in smb_init */
+	if (tcon->ses->server == NULL)
+		return -ECONNABORTED;
+
+	pSMB->AndXCommand = 0xFF;	/* none */
+	pSMB->Fid = netfid;
+	pSMB->OffsetLow = cpu_to_le32(offset & 0xFFFFFFFF);
+	if (wct == 14)
+		pSMB->OffsetHigh = cpu_to_le32(offset >> 32);
+
+	pSMB->Reserved = 0xFFFFFFFF;
+	pSMB->WriteMode = 0;
+	pSMB->Remaining = 0;
+
+	/* Can increase buffer size if buffer is big enough in some cases ie we
+	can send more if LARGE_WRITE_X capability returned by the server and if
+	our buffer is big enough or if we convert to iovecs on socket writes
+	and eliminate the copy to the CIFS buffer */
+	if (tcon->ses->capabilities & CAP_LARGE_WRITE_X) {
+		bytes_sent = min_t(const unsigned int, CIFSMaxBufSize, count);
+	} else {
+		bytes_sent = (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE)
+			 & ~0xFF;
+	}
+
+	if (bytes_sent > count)
+		bytes_sent = count;
+	pSMB->DataOffset =
+		cpu_to_le16(offsetof(struct smb_com_write_req, Data) - 4);
+	if (buf)
+		memcpy(pSMB->Data, buf, bytes_sent);
+	else if (count != 0) {
+		/* No buffer */
+		cifs_buf_release(pSMB);
+		return -EINVAL;
+	} /* else setting file size with write of zero bytes */
+	if (wct == 14)
+		byte_count = bytes_sent + 1; /* pad */
+	else /* wct == 12 */
+		byte_count = bytes_sent + 5; /* bigger pad, smaller smb hdr */
+
+	pSMB->DataLengthLow = cpu_to_le16(bytes_sent & 0xFFFF);
+	pSMB->DataLengthHigh = cpu_to_le16(bytes_sent >> 16);
+	inc_rfc1001_len(pSMB, byte_count);
+
+	if (wct == 14)
+		pSMB->ByteCount = cpu_to_le16(byte_count);
+	else { /* old style write has byte count 4 bytes earlier
+		  so 4 bytes pad  */
+		struct smb_com_writex_req *pSMBW =
+			(struct smb_com_writex_req *)pSMB;
+		pSMBW->ByteCount = cpu_to_le16(byte_count);
+	}
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	cifs_stats_inc(&tcon->stats.cifs_stats.num_writes);
+	if (rc) {
+		cifs_dbg(FYI, "Send error in write = %d\n", rc);
+	} else {
+		*nbytes = le16_to_cpu(pSMBr->CountHigh);
+		*nbytes = (*nbytes) << 16;
+		*nbytes += le16_to_cpu(pSMBr->Count);
+
+		/*
+		 * Mask off high 16 bits when bytes written as returned by the
+		 * server is greater than bytes requested by the client. Some
+		 * OS/2 servers are known to set incorrect CountHigh values.
+		 */
+		if (*nbytes > count)
+			*nbytes &= 0xFFFF;
+	}
+
+	cifs_buf_release(pSMB);
+
+	/* Note: On -EAGAIN error only caller can retry on handle based calls
+		since file handle passed in no longer valid */
+
+	return rc;
+}
+
+/*
+ * Check the mid_state and signature on received buffer (if any), and queue the
+ * workqueue completion task.
+ */
+static void
+cifs_writev_callback(struct mid_q_entry *mid)
+{
+	struct cifs_writedata *wdata = mid->callback_data;
+	struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
+	unsigned int written;
+	WRITE_RSP *smb = (WRITE_RSP *)mid->resp_buf;
+	struct cifs_credits credits = { .value = 1, .instance = 0 };
+
+	switch (mid->mid_state) {
+	case MID_RESPONSE_RECEIVED:
+		wdata->result = cifs_check_receive(mid, tcon->ses->server, 0);
+		if (wdata->result != 0)
+			break;
+
+		written = le16_to_cpu(smb->CountHigh);
+		written <<= 16;
+		written += le16_to_cpu(smb->Count);
+		/*
+		 * Mask off high 16 bits when bytes written as returned
+		 * by the server is greater than bytes requested by the
+		 * client. OS/2 servers are known to set incorrect
+		 * CountHigh values.
+		 */
+		if (written > wdata->bytes)
+			written &= 0xFFFF;
+
+		if (written < wdata->bytes)
+			wdata->result = -ENOSPC;
+		else
+			wdata->bytes = written;
+		break;
+	case MID_REQUEST_SUBMITTED:
+	case MID_RETRY_NEEDED:
+		wdata->result = -EAGAIN;
+		break;
+	default:
+		wdata->result = -EIO;
+		break;
+	}
+
+	queue_work(cifsiod_wq, &wdata->work);
+	release_mid(mid);
+	add_credits(tcon->ses->server, &credits, 0);
+}
+
+/* cifs_async_writev - send an async write, and set up mid to handle result */
+int
+cifs_async_writev(struct cifs_writedata *wdata,
+		  void (*release)(struct kref *kref))
+{
+	int rc = -EACCES;
+	WRITE_REQ *smb = NULL;
+	int wct;
+	struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
+	struct kvec iov[2];
+	struct smb_rqst rqst = { };
+
+	if (tcon->ses->capabilities & CAP_LARGE_FILES) {
+		wct = 14;
+	} else {
+		wct = 12;
+		if (wdata->offset >> 32 > 0) {
+			/* can not handle big offset for old srv */
+			return -EIO;
+		}
+	}
+
+	rc = small_smb_init(SMB_COM_WRITE_ANDX, wct, tcon, (void **)&smb);
+	if (rc)
+		goto async_writev_out;
+
+	smb->hdr.Pid = cpu_to_le16((__u16)wdata->pid);
+	smb->hdr.PidHigh = cpu_to_le16((__u16)(wdata->pid >> 16));
+
+	smb->AndXCommand = 0xFF;	/* none */
+	smb->Fid = wdata->cfile->fid.netfid;
+	smb->OffsetLow = cpu_to_le32(wdata->offset & 0xFFFFFFFF);
+	if (wct == 14)
+		smb->OffsetHigh = cpu_to_le32(wdata->offset >> 32);
+	smb->Reserved = 0xFFFFFFFF;
+	smb->WriteMode = 0;
+	smb->Remaining = 0;
+
+	smb->DataOffset =
+	    cpu_to_le16(offsetof(struct smb_com_write_req, Data) - 4);
+
+	/* 4 for RFC1001 length + 1 for BCC */
+	iov[0].iov_len = 4;
+	iov[0].iov_base = smb;
+	iov[1].iov_len = get_rfc1002_length(smb) + 1;
+	iov[1].iov_base = (char *)smb + 4;
+
+	rqst.rq_iov = iov;
+	rqst.rq_nvec = 2;
+	rqst.rq_iter = wdata->iter;
+	rqst.rq_iter_size = iov_iter_count(&wdata->iter);
+
+	cifs_dbg(FYI, "async write at %llu %u bytes\n",
+		 wdata->offset, wdata->bytes);
+
+	smb->DataLengthLow = cpu_to_le16(wdata->bytes & 0xFFFF);
+	smb->DataLengthHigh = cpu_to_le16(wdata->bytes >> 16);
+
+	if (wct == 14) {
+		inc_rfc1001_len(&smb->hdr, wdata->bytes + 1);
+		put_bcc(wdata->bytes + 1, &smb->hdr);
+	} else {
+		/* wct == 12 */
+		struct smb_com_writex_req *smbw =
+				(struct smb_com_writex_req *)smb;
+		inc_rfc1001_len(&smbw->hdr, wdata->bytes + 5);
+		put_bcc(wdata->bytes + 5, &smbw->hdr);
+		iov[1].iov_len += 4; /* pad bigger by four bytes */
+	}
+
+	kref_get(&wdata->refcount);
+	rc = cifs_call_async(tcon->ses->server, &rqst, NULL,
+			     cifs_writev_callback, NULL, wdata, 0, NULL);
+
+	if (rc == 0)
+		cifs_stats_inc(&tcon->stats.cifs_stats.num_writes);
+	else
+		kref_put(&wdata->refcount, release);
+
+async_writev_out:
+	cifs_small_buf_release(smb);
+	return rc;
+}
+
+int
+CIFSSMBWrite2(const unsigned int xid, struct cifs_io_parms *io_parms,
+	      unsigned int *nbytes, struct kvec *iov, int n_vec)
+{
+	int rc;
+	WRITE_REQ *pSMB = NULL;
+	int wct;
+	int smb_hdr_len;
+	int resp_buf_type = 0;
+	__u32 pid = io_parms->pid;
+	__u16 netfid = io_parms->netfid;
+	__u64 offset = io_parms->offset;
+	struct cifs_tcon *tcon = io_parms->tcon;
+	unsigned int count = io_parms->length;
+	struct kvec rsp_iov;
+
+	*nbytes = 0;
+
+	cifs_dbg(FYI, "write2 at %lld %d bytes\n", (long long)offset, count);
+
+	if (tcon->ses->capabilities & CAP_LARGE_FILES) {
+		wct = 14;
+	} else {
+		wct = 12;
+		if ((offset >> 32) > 0) {
+			/* can not handle big offset for old srv */
+			return -EIO;
+		}
+	}
+	rc = small_smb_init(SMB_COM_WRITE_ANDX, wct, tcon, (void **) &pSMB);
+	if (rc)
+		return rc;
+
+	pSMB->hdr.Pid = cpu_to_le16((__u16)pid);
+	pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid >> 16));
+
+	/* tcon and ses pointer are checked in smb_init */
+	if (tcon->ses->server == NULL)
+		return -ECONNABORTED;
+
+	pSMB->AndXCommand = 0xFF;	/* none */
+	pSMB->Fid = netfid;
+	pSMB->OffsetLow = cpu_to_le32(offset & 0xFFFFFFFF);
+	if (wct == 14)
+		pSMB->OffsetHigh = cpu_to_le32(offset >> 32);
+	pSMB->Reserved = 0xFFFFFFFF;
+	pSMB->WriteMode = 0;
+	pSMB->Remaining = 0;
+
+	pSMB->DataOffset =
+	    cpu_to_le16(offsetof(struct smb_com_write_req, Data) - 4);
+
+	pSMB->DataLengthLow = cpu_to_le16(count & 0xFFFF);
+	pSMB->DataLengthHigh = cpu_to_le16(count >> 16);
+	/* header + 1 byte pad */
+	smb_hdr_len = be32_to_cpu(pSMB->hdr.smb_buf_length) + 1;
+	if (wct == 14)
+		inc_rfc1001_len(pSMB, count + 1);
+	else /* wct == 12 */
+		inc_rfc1001_len(pSMB, count + 5); /* smb data starts later */
+	if (wct == 14)
+		pSMB->ByteCount = cpu_to_le16(count + 1);
+	else /* wct == 12 */ /* bigger pad, smaller smb hdr, keep offset ok */ {
+		struct smb_com_writex_req *pSMBW =
+				(struct smb_com_writex_req *)pSMB;
+		pSMBW->ByteCount = cpu_to_le16(count + 5);
+	}
+	iov[0].iov_base = pSMB;
+	if (wct == 14)
+		iov[0].iov_len = smb_hdr_len + 4;
+	else /* wct == 12 pad bigger by four bytes */
+		iov[0].iov_len = smb_hdr_len + 8;
+
+	rc = SendReceive2(xid, tcon->ses, iov, n_vec + 1, &resp_buf_type, 0,
+			  &rsp_iov);
+	cifs_small_buf_release(pSMB);
+	cifs_stats_inc(&tcon->stats.cifs_stats.num_writes);
+	if (rc) {
+		cifs_dbg(FYI, "Send error Write2 = %d\n", rc);
+	} else if (resp_buf_type == 0) {
+		/* presumably this can not happen, but best to be safe */
+		rc = -EIO;
+	} else {
+		WRITE_RSP *pSMBr = (WRITE_RSP *)rsp_iov.iov_base;
+		*nbytes = le16_to_cpu(pSMBr->CountHigh);
+		*nbytes = (*nbytes) << 16;
+		*nbytes += le16_to_cpu(pSMBr->Count);
+
+		/*
+		 * Mask off high 16 bits when bytes written as returned by the
+		 * server is greater than bytes requested by the client. OS/2
+		 * servers are known to set incorrect CountHigh values.
+		 */
+		if (*nbytes > count)
+			*nbytes &= 0xFFFF;
+	}
+
+	free_rsp_buf(resp_buf_type, rsp_iov.iov_base);
+
+	/* Note: On -EAGAIN error only caller can retry on handle based calls
+		since file handle passed in no longer valid */
+
+	return rc;
+}
+
+int cifs_lockv(const unsigned int xid, struct cifs_tcon *tcon,
+	       const __u16 netfid, const __u8 lock_type, const __u32 num_unlock,
+	       const __u32 num_lock, LOCKING_ANDX_RANGE *buf)
+{
+	int rc = 0;
+	LOCK_REQ *pSMB = NULL;
+	struct kvec iov[2];
+	struct kvec rsp_iov;
+	int resp_buf_type;
+	__u16 count;
+
+	cifs_dbg(FYI, "cifs_lockv num lock %d num unlock %d\n",
+		 num_lock, num_unlock);
+
+	rc = small_smb_init(SMB_COM_LOCKING_ANDX, 8, tcon, (void **) &pSMB);
+	if (rc)
+		return rc;
+
+	pSMB->Timeout = 0;
+	pSMB->NumberOfLocks = cpu_to_le16(num_lock);
+	pSMB->NumberOfUnlocks = cpu_to_le16(num_unlock);
+	pSMB->LockType = lock_type;
+	pSMB->AndXCommand = 0xFF; /* none */
+	pSMB->Fid = netfid; /* netfid stays le */
+
+	count = (num_unlock + num_lock) * sizeof(LOCKING_ANDX_RANGE);
+	inc_rfc1001_len(pSMB, count);
+	pSMB->ByteCount = cpu_to_le16(count);
+
+	iov[0].iov_base = (char *)pSMB;
+	iov[0].iov_len = be32_to_cpu(pSMB->hdr.smb_buf_length) + 4 -
+			 (num_unlock + num_lock) * sizeof(LOCKING_ANDX_RANGE);
+	iov[1].iov_base = (char *)buf;
+	iov[1].iov_len = (num_unlock + num_lock) * sizeof(LOCKING_ANDX_RANGE);
+
+	cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
+	rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type,
+			  CIFS_NO_RSP_BUF, &rsp_iov);
+	cifs_small_buf_release(pSMB);
+	if (rc)
+		cifs_dbg(FYI, "Send error in cifs_lockv = %d\n", rc);
+
+	return rc;
+}
+
+int
+CIFSSMBLock(const unsigned int xid, struct cifs_tcon *tcon,
+	    const __u16 smb_file_id, const __u32 netpid, const __u64 len,
+	    const __u64 offset, const __u32 numUnlock,
+	    const __u32 numLock, const __u8 lockType,
+	    const bool waitFlag, const __u8 oplock_level)
+{
+	int rc = 0;
+	LOCK_REQ *pSMB = NULL;
+/*	LOCK_RSP *pSMBr = NULL; */ /* No response data other than rc to parse */
+	int bytes_returned;
+	int flags = 0;
+	__u16 count;
+
+	cifs_dbg(FYI, "CIFSSMBLock timeout %d numLock %d\n",
+		 (int)waitFlag, numLock);
+	rc = small_smb_init(SMB_COM_LOCKING_ANDX, 8, tcon, (void **) &pSMB);
+
+	if (rc)
+		return rc;
+
+	if (lockType == LOCKING_ANDX_OPLOCK_RELEASE) {
+		/* no response expected */
+		flags = CIFS_NO_SRV_RSP | CIFS_NON_BLOCKING | CIFS_OBREAK_OP;
+		pSMB->Timeout = 0;
+	} else if (waitFlag) {
+		flags = CIFS_BLOCKING_OP; /* blocking operation, no timeout */
+		pSMB->Timeout = cpu_to_le32(-1);/* blocking - do not time out */
+	} else {
+		pSMB->Timeout = 0;
+	}
+
+	pSMB->NumberOfLocks = cpu_to_le16(numLock);
+	pSMB->NumberOfUnlocks = cpu_to_le16(numUnlock);
+	pSMB->LockType = lockType;
+	pSMB->OplockLevel = oplock_level;
+	pSMB->AndXCommand = 0xFF;	/* none */
+	pSMB->Fid = smb_file_id; /* netfid stays le */
+
+	if ((numLock != 0) || (numUnlock != 0)) {
+		pSMB->Locks[0].Pid = cpu_to_le16(netpid);
+		/* BB where to store pid high? */
+		pSMB->Locks[0].LengthLow = cpu_to_le32((u32)len);
+		pSMB->Locks[0].LengthHigh = cpu_to_le32((u32)(len>>32));
+		pSMB->Locks[0].OffsetLow = cpu_to_le32((u32)offset);
+		pSMB->Locks[0].OffsetHigh = cpu_to_le32((u32)(offset>>32));
+		count = sizeof(LOCKING_ANDX_RANGE);
+	} else {
+		/* oplock break */
+		count = 0;
+	}
+	inc_rfc1001_len(pSMB, count);
+	pSMB->ByteCount = cpu_to_le16(count);
+
+	if (waitFlag)
+		rc = SendReceiveBlockingLock(xid, tcon, (struct smb_hdr *) pSMB,
+			(struct smb_hdr *) pSMB, &bytes_returned);
+	else
+		rc = SendReceiveNoRsp(xid, tcon->ses, (char *)pSMB, flags);
+	cifs_small_buf_release(pSMB);
+	cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
+	if (rc)
+		cifs_dbg(FYI, "Send error in Lock = %d\n", rc);
+
+	/* Note: On -EAGAIN error only caller can retry on handle based calls
+	since file handle passed in no longer valid */
+	return rc;
+}
+
+int
+CIFSSMBPosixLock(const unsigned int xid, struct cifs_tcon *tcon,
+		const __u16 smb_file_id, const __u32 netpid,
+		const loff_t start_offset, const __u64 len,
+		struct file_lock *pLockData, const __u16 lock_type,
+		const bool waitFlag)
+{
+	struct smb_com_transaction2_sfi_req *pSMB  = NULL;
+	struct smb_com_transaction2_sfi_rsp *pSMBr = NULL;
+	struct cifs_posix_lock *parm_data;
+	int rc = 0;
+	int timeout = 0;
+	int bytes_returned = 0;
+	int resp_buf_type = 0;
+	__u16 params, param_offset, offset, byte_count, count;
+	struct kvec iov[1];
+	struct kvec rsp_iov;
+
+	cifs_dbg(FYI, "Posix Lock\n");
+
+	rc = small_smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB);
+
+	if (rc)
+		return rc;
+
+	pSMBr = (struct smb_com_transaction2_sfi_rsp *)pSMB;
+
+	params = 6;
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Reserved2 = 0;
+	param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
+	offset = param_offset + params;
+
+	count = sizeof(struct cifs_posix_lock);
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	pSMB->MaxDataCount = cpu_to_le16(1000); /* BB find max SMB from sess */
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	if (pLockData)
+		pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FILE_INFORMATION);
+	else
+		pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION);
+	byte_count = 3 /* pad */  + params + count;
+	pSMB->DataCount = cpu_to_le16(count);
+	pSMB->ParameterCount = cpu_to_le16(params);
+	pSMB->TotalDataCount = pSMB->DataCount;
+	pSMB->TotalParameterCount = pSMB->ParameterCount;
+	pSMB->ParameterOffset = cpu_to_le16(param_offset);
+	/* SMB offsets are from the beginning of SMB which is 4 bytes in, after RFC1001 field */
+	parm_data = (struct cifs_posix_lock *)
+			(((char *)pSMB) + offset + 4);
+
+	parm_data->lock_type = cpu_to_le16(lock_type);
+	if (waitFlag) {
+		timeout = CIFS_BLOCKING_OP; /* blocking operation, no timeout */
+		parm_data->lock_flags = cpu_to_le16(1);
+		pSMB->Timeout = cpu_to_le32(-1);
+	} else
+		pSMB->Timeout = 0;
+
+	parm_data->pid = cpu_to_le32(netpid);
+	parm_data->start = cpu_to_le64(start_offset);
+	parm_data->length = cpu_to_le64(len);  /* normalize negative numbers */
+
+	pSMB->DataOffset = cpu_to_le16(offset);
+	pSMB->Fid = smb_file_id;
+	pSMB->InformationLevel = cpu_to_le16(SMB_SET_POSIX_LOCK);
+	pSMB->Reserved4 = 0;
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+	if (waitFlag) {
+		rc = SendReceiveBlockingLock(xid, tcon, (struct smb_hdr *) pSMB,
+			(struct smb_hdr *) pSMBr, &bytes_returned);
+	} else {
+		iov[0].iov_base = (char *)pSMB;
+		iov[0].iov_len = be32_to_cpu(pSMB->hdr.smb_buf_length) + 4;
+		rc = SendReceive2(xid, tcon->ses, iov, 1 /* num iovecs */,
+				&resp_buf_type, timeout, &rsp_iov);
+		pSMBr = (struct smb_com_transaction2_sfi_rsp *)rsp_iov.iov_base;
+	}
+	cifs_small_buf_release(pSMB);
+
+	if (rc) {
+		cifs_dbg(FYI, "Send error in Posix Lock = %d\n", rc);
+	} else if (pLockData) {
+		/* lock structure can be returned on get */
+		__u16 data_offset;
+		__u16 data_count;
+		rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+		if (rc || get_bcc(&pSMBr->hdr) < sizeof(*parm_data)) {
+			rc = -EIO;      /* bad smb */
+			goto plk_err_exit;
+		}
+		data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+		data_count  = le16_to_cpu(pSMBr->t2.DataCount);
+		if (data_count < sizeof(struct cifs_posix_lock)) {
+			rc = -EIO;
+			goto plk_err_exit;
+		}
+		parm_data = (struct cifs_posix_lock *)
+			((char *)&pSMBr->hdr.Protocol + data_offset);
+		if (parm_data->lock_type == cpu_to_le16(CIFS_UNLCK))
+			pLockData->fl_type = F_UNLCK;
+		else {
+			if (parm_data->lock_type ==
+					cpu_to_le16(CIFS_RDLCK))
+				pLockData->fl_type = F_RDLCK;
+			else if (parm_data->lock_type ==
+					cpu_to_le16(CIFS_WRLCK))
+				pLockData->fl_type = F_WRLCK;
+
+			pLockData->fl_start = le64_to_cpu(parm_data->start);
+			pLockData->fl_end = pLockData->fl_start +
+				(le64_to_cpu(parm_data->length) ?
+				 le64_to_cpu(parm_data->length) - 1 : 0);
+			pLockData->fl_pid = -le32_to_cpu(parm_data->pid);
+		}
+	}
+
+plk_err_exit:
+	free_rsp_buf(resp_buf_type, rsp_iov.iov_base);
+
+	/* Note: On -EAGAIN error only caller can retry on handle based calls
+	   since file handle passed in no longer valid */
+
+	return rc;
+}
+
+
+int
+CIFSSMBClose(const unsigned int xid, struct cifs_tcon *tcon, int smb_file_id)
+{
+	int rc = 0;
+	CLOSE_REQ *pSMB = NULL;
+	cifs_dbg(FYI, "In CIFSSMBClose\n");
+
+/* do not retry on dead session on close */
+	rc = small_smb_init(SMB_COM_CLOSE, 3, tcon, (void **) &pSMB);
+	if (rc == -EAGAIN)
+		return 0;
+	if (rc)
+		return rc;
+
+	pSMB->FileID = (__u16) smb_file_id;
+	pSMB->LastWriteTime = 0xFFFFFFFF;
+	pSMB->ByteCount = 0;
+	rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0);
+	cifs_small_buf_release(pSMB);
+	cifs_stats_inc(&tcon->stats.cifs_stats.num_closes);
+	if (rc) {
+		if (rc != -EINTR) {
+			/* EINTR is expected when user ctl-c to kill app */
+			cifs_dbg(VFS, "Send error in Close = %d\n", rc);
+		}
+	}
+
+	/* Since session is dead, file will be closed on server already */
+	if (rc == -EAGAIN)
+		rc = 0;
+
+	return rc;
+}
+
+int
+CIFSSMBFlush(const unsigned int xid, struct cifs_tcon *tcon, int smb_file_id)
+{
+	int rc = 0;
+	FLUSH_REQ *pSMB = NULL;
+	cifs_dbg(FYI, "In CIFSSMBFlush\n");
+
+	rc = small_smb_init(SMB_COM_FLUSH, 1, tcon, (void **) &pSMB);
+	if (rc)
+		return rc;
+
+	pSMB->FileID = (__u16) smb_file_id;
+	pSMB->ByteCount = 0;
+	rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0);
+	cifs_small_buf_release(pSMB);
+	cifs_stats_inc(&tcon->stats.cifs_stats.num_flushes);
+	if (rc)
+		cifs_dbg(VFS, "Send error in Flush = %d\n", rc);
+
+	return rc;
+}
+
+int
+CIFSSMBRename(const unsigned int xid, struct cifs_tcon *tcon,
+	      const char *from_name, const char *to_name,
+	      struct cifs_sb_info *cifs_sb)
+{
+	int rc = 0;
+	RENAME_REQ *pSMB = NULL;
+	RENAME_RSP *pSMBr = NULL;
+	int bytes_returned;
+	int name_len, name_len2;
+	__u16 count;
+	int remap = cifs_remap(cifs_sb);
+
+	cifs_dbg(FYI, "In CIFSSMBRename\n");
+renameRetry:
+	rc = smb_init(SMB_COM_RENAME, 1, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	pSMB->BufferFormat = 0x04;
+	pSMB->SearchAttributes =
+	    cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM |
+			ATTR_DIRECTORY);
+
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len = cifsConvertToUTF16((__le16 *) pSMB->OldFileName,
+					      from_name, PATH_MAX,
+					      cifs_sb->local_nls, remap);
+		name_len++;	/* trailing null */
+		name_len *= 2;
+		pSMB->OldFileName[name_len] = 0x04;	/* pad */
+	/* protocol requires ASCII signature byte on Unicode string */
+		pSMB->OldFileName[name_len + 1] = 0x00;
+		name_len2 =
+		    cifsConvertToUTF16((__le16 *)&pSMB->OldFileName[name_len+2],
+				       to_name, PATH_MAX, cifs_sb->local_nls,
+				       remap);
+		name_len2 += 1 /* trailing null */  + 1 /* Signature word */ ;
+		name_len2 *= 2;	/* convert to bytes */
+	} else {
+		name_len = copy_path_name(pSMB->OldFileName, from_name);
+		name_len2 = copy_path_name(pSMB->OldFileName+name_len+1, to_name);
+		pSMB->OldFileName[name_len] = 0x04;  /* 2nd buffer format */
+		name_len2++;	/* signature byte */
+	}
+
+	count = 1 /* 1st signature byte */  + name_len + name_len2;
+	inc_rfc1001_len(pSMB, count);
+	pSMB->ByteCount = cpu_to_le16(count);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	cifs_stats_inc(&tcon->stats.cifs_stats.num_renames);
+	if (rc)
+		cifs_dbg(FYI, "Send error in rename = %d\n", rc);
+
+	cifs_buf_release(pSMB);
+
+	if (rc == -EAGAIN)
+		goto renameRetry;
+
+	return rc;
+}
+
+int CIFSSMBRenameOpenFile(const unsigned int xid, struct cifs_tcon *pTcon,
+		int netfid, const char *target_name,
+		const struct nls_table *nls_codepage, int remap)
+{
+	struct smb_com_transaction2_sfi_req *pSMB  = NULL;
+	struct smb_com_transaction2_sfi_rsp *pSMBr = NULL;
+	struct set_file_rename *rename_info;
+	char *data_offset;
+	char dummy_string[30];
+	int rc = 0;
+	int bytes_returned = 0;
+	int len_of_str;
+	__u16 params, param_offset, offset, count, byte_count;
+
+	cifs_dbg(FYI, "Rename to File by handle\n");
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, pTcon, (void **) &pSMB,
+			(void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	params = 6;
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
+	offset = param_offset + params;
+
+	/* SMB offsets are from the beginning of SMB which is 4 bytes in, after RFC1001 field */
+	data_offset = (char *)(pSMB) + offset + 4;
+	rename_info = (struct set_file_rename *) data_offset;
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	pSMB->MaxDataCount = cpu_to_le16(1000); /* BB find max SMB from sess */
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION);
+	byte_count = 3 /* pad */  + params;
+	pSMB->ParameterCount = cpu_to_le16(params);
+	pSMB->TotalParameterCount = pSMB->ParameterCount;
+	pSMB->ParameterOffset = cpu_to_le16(param_offset);
+	pSMB->DataOffset = cpu_to_le16(offset);
+	/* construct random name ".cifs_tmp<inodenum><mid>" */
+	rename_info->overwrite = cpu_to_le32(1);
+	rename_info->root_fid  = 0;
+	/* unicode only call */
+	if (target_name == NULL) {
+		sprintf(dummy_string, "cifs%x", pSMB->hdr.Mid);
+		len_of_str =
+			cifsConvertToUTF16((__le16 *)rename_info->target_name,
+					dummy_string, 24, nls_codepage, remap);
+	} else {
+		len_of_str =
+			cifsConvertToUTF16((__le16 *)rename_info->target_name,
+					target_name, PATH_MAX, nls_codepage,
+					remap);
+	}
+	rename_info->target_name_len = cpu_to_le32(2 * len_of_str);
+	count = sizeof(struct set_file_rename) + (2 * len_of_str);
+	byte_count += count;
+	pSMB->DataCount = cpu_to_le16(count);
+	pSMB->TotalDataCount = pSMB->DataCount;
+	pSMB->Fid = netfid;
+	pSMB->InformationLevel =
+		cpu_to_le16(SMB_SET_FILE_RENAME_INFORMATION);
+	pSMB->Reserved4 = 0;
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+	rc = SendReceive(xid, pTcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	cifs_stats_inc(&pTcon->stats.cifs_stats.num_t2renames);
+	if (rc)
+		cifs_dbg(FYI, "Send error in Rename (by file handle) = %d\n",
+			 rc);
+
+	cifs_buf_release(pSMB);
+
+	/* Note: On -EAGAIN error only caller can retry on handle based calls
+		since file handle passed in no longer valid */
+
+	return rc;
+}
+
+int
+CIFSSMBCopy(const unsigned int xid, struct cifs_tcon *tcon,
+	    const char *fromName, const __u16 target_tid, const char *toName,
+	    const int flags, const struct nls_table *nls_codepage, int remap)
+{
+	int rc = 0;
+	COPY_REQ *pSMB = NULL;
+	COPY_RSP *pSMBr = NULL;
+	int bytes_returned;
+	int name_len, name_len2;
+	__u16 count;
+
+	cifs_dbg(FYI, "In CIFSSMBCopy\n");
+copyRetry:
+	rc = smb_init(SMB_COM_COPY, 1, tcon, (void **) &pSMB,
+			(void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	pSMB->BufferFormat = 0x04;
+	pSMB->Tid2 = target_tid;
+
+	pSMB->Flags = cpu_to_le16(flags & COPY_TREE);
+
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len = cifsConvertToUTF16((__le16 *) pSMB->OldFileName,
+					      fromName, PATH_MAX, nls_codepage,
+					      remap);
+		name_len++;     /* trailing null */
+		name_len *= 2;
+		pSMB->OldFileName[name_len] = 0x04;     /* pad */
+		/* protocol requires ASCII signature byte on Unicode string */
+		pSMB->OldFileName[name_len + 1] = 0x00;
+		name_len2 =
+		    cifsConvertToUTF16((__le16 *)&pSMB->OldFileName[name_len+2],
+				       toName, PATH_MAX, nls_codepage, remap);
+		name_len2 += 1 /* trailing null */  + 1 /* Signature word */ ;
+		name_len2 *= 2; /* convert to bytes */
+	} else {
+		name_len = copy_path_name(pSMB->OldFileName, fromName);
+		pSMB->OldFileName[name_len] = 0x04;  /* 2nd buffer format */
+		name_len2 = copy_path_name(pSMB->OldFileName+name_len+1, toName);
+		name_len2++;    /* signature byte */
+	}
+
+	count = 1 /* 1st signature byte */  + name_len + name_len2;
+	inc_rfc1001_len(pSMB, count);
+	pSMB->ByteCount = cpu_to_le16(count);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+		(struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc) {
+		cifs_dbg(FYI, "Send error in copy = %d with %d files copied\n",
+			 rc, le16_to_cpu(pSMBr->CopyCount));
+	}
+	cifs_buf_release(pSMB);
+
+	if (rc == -EAGAIN)
+		goto copyRetry;
+
+	return rc;
+}
+
+int
+CIFSUnixCreateSymLink(const unsigned int xid, struct cifs_tcon *tcon,
+		      const char *fromName, const char *toName,
+		      const struct nls_table *nls_codepage, int remap)
+{
+	TRANSACTION2_SPI_REQ *pSMB = NULL;
+	TRANSACTION2_SPI_RSP *pSMBr = NULL;
+	char *data_offset;
+	int name_len;
+	int name_len_target;
+	int rc = 0;
+	int bytes_returned = 0;
+	__u16 params, param_offset, offset, byte_count;
+
+	cifs_dbg(FYI, "In Symlink Unix style\n");
+createSymLinkRetry:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len =
+		    cifsConvertToUTF16((__le16 *) pSMB->FileName, fromName,
+				/* find define for this maxpathcomponent */
+					PATH_MAX, nls_codepage, remap);
+		name_len++;	/* trailing null */
+		name_len *= 2;
+
+	} else {
+		name_len = copy_path_name(pSMB->FileName, fromName);
+	}
+	params = 6 + name_len;
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	param_offset = offsetof(struct smb_com_transaction2_spi_req,
+				InformationLevel) - 4;
+	offset = param_offset + params;
+
+	/* SMB offsets are from the beginning of SMB which is 4 bytes in, after RFC1001 field */
+	data_offset = (char *)pSMB + offset + 4;
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len_target =
+		    cifsConvertToUTF16((__le16 *) data_offset, toName,
+				/* find define for this maxpathcomponent */
+					PATH_MAX, nls_codepage, remap);
+		name_len_target++;	/* trailing null */
+		name_len_target *= 2;
+	} else {
+		name_len_target = copy_path_name(data_offset, toName);
+	}
+
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	/* BB find exact max on data count below from sess */
+	pSMB->MaxDataCount = cpu_to_le16(1000);
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
+	byte_count = 3 /* pad */  + params + name_len_target;
+	pSMB->DataCount = cpu_to_le16(name_len_target);
+	pSMB->ParameterCount = cpu_to_le16(params);
+	pSMB->TotalDataCount = pSMB->DataCount;
+	pSMB->TotalParameterCount = pSMB->ParameterCount;
+	pSMB->ParameterOffset = cpu_to_le16(param_offset);
+	pSMB->DataOffset = cpu_to_le16(offset);
+	pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_UNIX_LINK);
+	pSMB->Reserved4 = 0;
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	cifs_stats_inc(&tcon->stats.cifs_stats.num_symlinks);
+	if (rc)
+		cifs_dbg(FYI, "Send error in SetPathInfo create symlink = %d\n",
+			 rc);
+
+	cifs_buf_release(pSMB);
+
+	if (rc == -EAGAIN)
+		goto createSymLinkRetry;
+
+	return rc;
+}
+
+int
+CIFSUnixCreateHardLink(const unsigned int xid, struct cifs_tcon *tcon,
+		       const char *fromName, const char *toName,
+		       const struct nls_table *nls_codepage, int remap)
+{
+	TRANSACTION2_SPI_REQ *pSMB = NULL;
+	TRANSACTION2_SPI_RSP *pSMBr = NULL;
+	char *data_offset;
+	int name_len;
+	int name_len_target;
+	int rc = 0;
+	int bytes_returned = 0;
+	__u16 params, param_offset, offset, byte_count;
+
+	cifs_dbg(FYI, "In Create Hard link Unix style\n");
+createHardLinkRetry:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len = cifsConvertToUTF16((__le16 *) pSMB->FileName, toName,
+					      PATH_MAX, nls_codepage, remap);
+		name_len++;	/* trailing null */
+		name_len *= 2;
+
+	} else {
+		name_len = copy_path_name(pSMB->FileName, toName);
+	}
+	params = 6 + name_len;
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	param_offset = offsetof(struct smb_com_transaction2_spi_req,
+				InformationLevel) - 4;
+	offset = param_offset + params;
+
+	/* SMB offsets are from the beginning of SMB which is 4 bytes in, after RFC1001 field */
+	data_offset = (char *)pSMB + offset + 4;
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len_target =
+		    cifsConvertToUTF16((__le16 *) data_offset, fromName,
+				       PATH_MAX, nls_codepage, remap);
+		name_len_target++;	/* trailing null */
+		name_len_target *= 2;
+	} else {
+		name_len_target = copy_path_name(data_offset, fromName);
+	}
+
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	/* BB find exact max on data count below from sess*/
+	pSMB->MaxDataCount = cpu_to_le16(1000);
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
+	byte_count = 3 /* pad */  + params + name_len_target;
+	pSMB->ParameterCount = cpu_to_le16(params);
+	pSMB->TotalParameterCount = pSMB->ParameterCount;
+	pSMB->DataCount = cpu_to_le16(name_len_target);
+	pSMB->TotalDataCount = pSMB->DataCount;
+	pSMB->ParameterOffset = cpu_to_le16(param_offset);
+	pSMB->DataOffset = cpu_to_le16(offset);
+	pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_UNIX_HLINK);
+	pSMB->Reserved4 = 0;
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	cifs_stats_inc(&tcon->stats.cifs_stats.num_hardlinks);
+	if (rc)
+		cifs_dbg(FYI, "Send error in SetPathInfo (hard link) = %d\n",
+			 rc);
+
+	cifs_buf_release(pSMB);
+	if (rc == -EAGAIN)
+		goto createHardLinkRetry;
+
+	return rc;
+}
+
+int
+CIFSCreateHardLink(const unsigned int xid, struct cifs_tcon *tcon,
+		   const char *from_name, const char *to_name,
+		   struct cifs_sb_info *cifs_sb)
+{
+	int rc = 0;
+	NT_RENAME_REQ *pSMB = NULL;
+	RENAME_RSP *pSMBr = NULL;
+	int bytes_returned;
+	int name_len, name_len2;
+	__u16 count;
+	int remap = cifs_remap(cifs_sb);
+
+	cifs_dbg(FYI, "In CIFSCreateHardLink\n");
+winCreateHardLinkRetry:
+
+	rc = smb_init(SMB_COM_NT_RENAME, 4, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	pSMB->SearchAttributes =
+	    cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM |
+			ATTR_DIRECTORY);
+	pSMB->Flags = cpu_to_le16(CREATE_HARD_LINK);
+	pSMB->ClusterCount = 0;
+
+	pSMB->BufferFormat = 0x04;
+
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len =
+		    cifsConvertToUTF16((__le16 *) pSMB->OldFileName, from_name,
+				       PATH_MAX, cifs_sb->local_nls, remap);
+		name_len++;	/* trailing null */
+		name_len *= 2;
+
+		/* protocol specifies ASCII buffer format (0x04) for unicode */
+		pSMB->OldFileName[name_len] = 0x04;
+		pSMB->OldFileName[name_len + 1] = 0x00; /* pad */
+		name_len2 =
+		    cifsConvertToUTF16((__le16 *)&pSMB->OldFileName[name_len+2],
+				       to_name, PATH_MAX, cifs_sb->local_nls,
+				       remap);
+		name_len2 += 1 /* trailing null */  + 1 /* Signature word */ ;
+		name_len2 *= 2;	/* convert to bytes */
+	} else {
+		name_len = copy_path_name(pSMB->OldFileName, from_name);
+		pSMB->OldFileName[name_len] = 0x04;	/* 2nd buffer format */
+		name_len2 = copy_path_name(pSMB->OldFileName+name_len+1, to_name);
+		name_len2++;	/* signature byte */
+	}
+
+	count = 1 /* string type byte */  + name_len + name_len2;
+	inc_rfc1001_len(pSMB, count);
+	pSMB->ByteCount = cpu_to_le16(count);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	cifs_stats_inc(&tcon->stats.cifs_stats.num_hardlinks);
+	if (rc)
+		cifs_dbg(FYI, "Send error in hard link (NT rename) = %d\n", rc);
+
+	cifs_buf_release(pSMB);
+	if (rc == -EAGAIN)
+		goto winCreateHardLinkRetry;
+
+	return rc;
+}
+
+int
+CIFSSMBUnixQuerySymLink(const unsigned int xid, struct cifs_tcon *tcon,
+			const unsigned char *searchName, char **symlinkinfo,
+			const struct nls_table *nls_codepage, int remap)
+{
+/* SMB_QUERY_FILE_UNIX_LINK */
+	TRANSACTION2_QPI_REQ *pSMB = NULL;
+	TRANSACTION2_QPI_RSP *pSMBr = NULL;
+	int rc = 0;
+	int bytes_returned;
+	int name_len;
+	__u16 params, byte_count;
+	char *data_start;
+
+	cifs_dbg(FYI, "In QPathSymLinkInfo (Unix) for path %s\n", searchName);
+
+querySymLinkRetry:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len =
+			cifsConvertToUTF16((__le16 *) pSMB->FileName,
+					   searchName, PATH_MAX, nls_codepage,
+					   remap);
+		name_len++;	/* trailing null */
+		name_len *= 2;
+	} else {
+		name_len = copy_path_name(pSMB->FileName, searchName);
+	}
+
+	params = 2 /* level */  + 4 /* rsrvd */  + name_len /* incl null */ ;
+	pSMB->TotalDataCount = 0;
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	pSMB->MaxDataCount = cpu_to_le16(CIFSMaxBufSize);
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	pSMB->ParameterOffset = cpu_to_le16(offsetof(
+	struct smb_com_transaction2_qpi_req, InformationLevel) - 4);
+	pSMB->DataCount = 0;
+	pSMB->DataOffset = 0;
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
+	byte_count = params + 1 /* pad */ ;
+	pSMB->TotalParameterCount = cpu_to_le16(params);
+	pSMB->ParameterCount = pSMB->TotalParameterCount;
+	pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_UNIX_LINK);
+	pSMB->Reserved4 = 0;
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc) {
+		cifs_dbg(FYI, "Send error in QuerySymLinkInfo = %d\n", rc);
+	} else {
+		/* decode response */
+
+		rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+		/* BB also check enough total bytes returned */
+		if (rc || get_bcc(&pSMBr->hdr) < 2)
+			rc = -EIO;
+		else {
+			bool is_unicode;
+			u16 count = le16_to_cpu(pSMBr->t2.DataCount);
+
+			data_start = ((char *) &pSMBr->hdr.Protocol) +
+					   le16_to_cpu(pSMBr->t2.DataOffset);
+
+			if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE)
+				is_unicode = true;
+			else
+				is_unicode = false;
+
+			/* BB FIXME investigate remapping reserved chars here */
+			*symlinkinfo = cifs_strndup_from_utf16(data_start,
+					count, is_unicode, nls_codepage);
+			if (!*symlinkinfo)
+				rc = -ENOMEM;
+		}
+	}
+	cifs_buf_release(pSMB);
+	if (rc == -EAGAIN)
+		goto querySymLinkRetry;
+	return rc;
+}
+
+int cifs_query_reparse_point(const unsigned int xid,
+			     struct cifs_tcon *tcon,
+			     struct cifs_sb_info *cifs_sb,
+			     const char *full_path,
+			     u32 *tag, struct kvec *rsp,
+			     int *rsp_buftype)
+{
+	struct cifs_open_parms oparms;
+	TRANSACT_IOCTL_REQ *io_req = NULL;
+	TRANSACT_IOCTL_RSP *io_rsp = NULL;
+	struct cifs_fid fid;
+	__u32 data_offset, data_count;
+	__u8 *start, *end;
+	int io_rsp_len;
+	int oplock = 0;
+	int rc;
+
+	cifs_tcon_dbg(FYI, "%s: path=%s\n", __func__, full_path);
+
+	if (cap_unix(tcon->ses))
+		return -EOPNOTSUPP;
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.cifs_sb = cifs_sb,
+		.desired_access = FILE_READ_ATTRIBUTES,
+		.create_options = cifs_create_options(cifs_sb,
+						      OPEN_REPARSE_POINT),
+		.disposition = FILE_OPEN,
+		.path = full_path,
+		.fid = &fid,
+	};
+
+	rc = CIFS_open(xid, &oparms, &oplock, NULL);
+	if (rc)
+		return rc;
+
+	rc = smb_init(SMB_COM_NT_TRANSACT, 23, tcon,
+		      (void **)&io_req, (void **)&io_rsp);
+	if (rc)
+		goto error;
+
+	io_req->TotalParameterCount = 0;
+	io_req->TotalDataCount = 0;
+	io_req->MaxParameterCount = cpu_to_le32(2);
+	/* BB find exact data count max from sess structure BB */
+	io_req->MaxDataCount = cpu_to_le32(CIFSMaxBufSize & 0xFFFFFF00);
+	io_req->MaxSetupCount = 4;
+	io_req->Reserved = 0;
+	io_req->ParameterOffset = 0;
+	io_req->DataCount = 0;
+	io_req->DataOffset = 0;
+	io_req->SetupCount = 4;
+	io_req->SubCommand = cpu_to_le16(NT_TRANSACT_IOCTL);
+	io_req->ParameterCount = io_req->TotalParameterCount;
+	io_req->FunctionCode = cpu_to_le32(FSCTL_GET_REPARSE_POINT);
+	io_req->IsFsctl = 1;
+	io_req->IsRootFlag = 0;
+	io_req->Fid = fid.netfid;
+	io_req->ByteCount = 0;
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *)io_req,
+			 (struct smb_hdr *)io_rsp, &io_rsp_len, 0);
+	if (rc)
+		goto error;
+
+	data_offset = le32_to_cpu(io_rsp->DataOffset);
+	data_count = le32_to_cpu(io_rsp->DataCount);
+	if (get_bcc(&io_rsp->hdr) < 2 || data_offset > 512 ||
+	    !data_count || data_count > 2048) {
+		rc = -EIO;
+		goto error;
+	}
+
+	end = 2 + get_bcc(&io_rsp->hdr) + (__u8 *)&io_rsp->ByteCount;
+	start = (__u8 *)&io_rsp->hdr.Protocol + data_offset;
+	if (start >= end) {
+		rc = -EIO;
+		goto error;
+	}
+
+	*tag = le32_to_cpu(((struct reparse_data_buffer *)start)->ReparseTag);
+	rsp->iov_base = io_rsp;
+	rsp->iov_len = io_rsp_len;
+	*rsp_buftype = CIFS_LARGE_BUFFER;
+	CIFSSMBClose(xid, tcon, fid.netfid);
+	return 0;
+
+error:
+	cifs_buf_release(io_req);
+	CIFSSMBClose(xid, tcon, fid.netfid);
+	return rc;
+}
+
+int
+CIFSSMB_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
+		    __u16 fid)
+{
+	int rc = 0;
+	int bytes_returned;
+	struct smb_com_transaction_compr_ioctl_req *pSMB;
+	struct smb_com_transaction_ioctl_rsp *pSMBr;
+
+	cifs_dbg(FYI, "Set compression for %u\n", fid);
+	rc = smb_init(SMB_COM_NT_TRANSACT, 23, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	pSMB->compression_state = cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
+
+	pSMB->TotalParameterCount = 0;
+	pSMB->TotalDataCount = cpu_to_le32(2);
+	pSMB->MaxParameterCount = 0;
+	pSMB->MaxDataCount = 0;
+	pSMB->MaxSetupCount = 4;
+	pSMB->Reserved = 0;
+	pSMB->ParameterOffset = 0;
+	pSMB->DataCount = cpu_to_le32(2);
+	pSMB->DataOffset =
+		cpu_to_le32(offsetof(struct smb_com_transaction_compr_ioctl_req,
+				compression_state) - 4);  /* 84 */
+	pSMB->SetupCount = 4;
+	pSMB->SubCommand = cpu_to_le16(NT_TRANSACT_IOCTL);
+	pSMB->ParameterCount = 0;
+	pSMB->FunctionCode = cpu_to_le32(FSCTL_SET_COMPRESSION);
+	pSMB->IsFsctl = 1; /* FSCTL */
+	pSMB->IsRootFlag = 0;
+	pSMB->Fid = fid; /* file handle always le */
+	/* 3 byte pad, followed by 2 byte compress state */
+	pSMB->ByteCount = cpu_to_le16(5);
+	inc_rfc1001_len(pSMB, 5);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc)
+		cifs_dbg(FYI, "Send error in SetCompression = %d\n", rc);
+
+	cifs_buf_release(pSMB);
+
+	/*
+	 * Note: On -EAGAIN error only caller can retry on handle based calls
+	 * since file handle passed in no longer valid.
+	 */
+	return rc;
+}
+
+
+#ifdef CONFIG_CIFS_POSIX
+
+#ifdef CONFIG_FS_POSIX_ACL
+/**
+ * cifs_init_posix_acl - convert ACL from cifs to POSIX ACL format
+ * @ace: POSIX ACL entry to store converted ACL into
+ * @cifs_ace: ACL in cifs format
+ *
+ * Convert an Access Control Entry from wire format to local POSIX xattr
+ * format.
+ *
+ * Note that the @cifs_uid member is used to store both {g,u}id_t.
+ */
+static void cifs_init_posix_acl(struct posix_acl_entry *ace,
+				struct cifs_posix_ace *cifs_ace)
+{
+	/* u8 cifs fields do not need le conversion */
+	ace->e_perm = cifs_ace->cifs_e_perm;
+	ace->e_tag = cifs_ace->cifs_e_tag;
+
+	switch (ace->e_tag) {
+	case ACL_USER:
+		ace->e_uid = make_kuid(&init_user_ns,
+				       le64_to_cpu(cifs_ace->cifs_uid));
+		break;
+	case ACL_GROUP:
+		ace->e_gid = make_kgid(&init_user_ns,
+				       le64_to_cpu(cifs_ace->cifs_uid));
+		break;
+	}
+	return;
+}
+
+/**
+ * cifs_to_posix_acl - copy cifs ACL format to POSIX ACL format
+ * @acl: ACLs returned in POSIX ACL format
+ * @src: ACLs in cifs format
+ * @acl_type: type of POSIX ACL requested
+ * @size_of_data_area: size of SMB we got
+ *
+ * This function converts ACLs from cifs format to POSIX ACL format.
+ * If @acl is NULL then the size of the buffer required to store POSIX ACLs in
+ * their uapi format is returned.
+ */
+static int cifs_to_posix_acl(struct posix_acl **acl, char *src,
+			     const int acl_type, const int size_of_data_area)
+{
+	int size =  0;
+	__u16 count;
+	struct cifs_posix_ace *pACE;
+	struct cifs_posix_acl *cifs_acl = (struct cifs_posix_acl *)src;
+	struct posix_acl *kacl = NULL;
+	struct posix_acl_entry *pa, *pe;
+
+	if (le16_to_cpu(cifs_acl->version) != CIFS_ACL_VERSION)
+		return -EOPNOTSUPP;
+
+	if (acl_type == ACL_TYPE_ACCESS) {
+		count = le16_to_cpu(cifs_acl->access_entry_count);
+		pACE = &cifs_acl->ace_array[0];
+		size = sizeof(struct cifs_posix_acl);
+		size += sizeof(struct cifs_posix_ace) * count;
+		/* check if we would go beyond end of SMB */
+		if (size_of_data_area < size) {
+			cifs_dbg(FYI, "bad CIFS POSIX ACL size %d vs. %d\n",
+				 size_of_data_area, size);
+			return -EINVAL;
+		}
+	} else if (acl_type == ACL_TYPE_DEFAULT) {
+		count = le16_to_cpu(cifs_acl->access_entry_count);
+		size = sizeof(struct cifs_posix_acl);
+		size += sizeof(struct cifs_posix_ace) * count;
+		/* skip past access ACEs to get to default ACEs */
+		pACE = &cifs_acl->ace_array[count];
+		count = le16_to_cpu(cifs_acl->default_entry_count);
+		size += sizeof(struct cifs_posix_ace) * count;
+		/* check if we would go beyond end of SMB */
+		if (size_of_data_area < size)
+			return -EINVAL;
+	} else {
+		/* illegal type */
+		return -EINVAL;
+	}
+
+	/* Allocate number of POSIX ACLs to store in VFS format. */
+	kacl = posix_acl_alloc(count, GFP_NOFS);
+	if (!kacl)
+		return -ENOMEM;
+
+	FOREACH_ACL_ENTRY(pa, kacl, pe) {
+		cifs_init_posix_acl(pa, pACE);
+		pACE++;
+	}
+
+	*acl = kacl;
+	return 0;
+}
+
+/**
+ * cifs_init_ace - convert ACL entry from POSIX ACL to cifs format
+ * @cifs_ace: the cifs ACL entry to store into
+ * @local_ace: the POSIX ACL entry to convert
+ */
+static void cifs_init_ace(struct cifs_posix_ace *cifs_ace,
+			  const struct posix_acl_entry *local_ace)
+{
+	cifs_ace->cifs_e_perm = local_ace->e_perm;
+	cifs_ace->cifs_e_tag =  local_ace->e_tag;
+
+	switch (local_ace->e_tag) {
+	case ACL_USER:
+		cifs_ace->cifs_uid =
+			cpu_to_le64(from_kuid(&init_user_ns, local_ace->e_uid));
+		break;
+	case ACL_GROUP:
+		cifs_ace->cifs_uid =
+			cpu_to_le64(from_kgid(&init_user_ns, local_ace->e_gid));
+		break;
+	default:
+		cifs_ace->cifs_uid = cpu_to_le64(-1);
+	}
+}
+
+/**
+ * posix_acl_to_cifs - convert ACLs from POSIX ACL to cifs format
+ * @parm_data: ACLs in cifs format to conver to
+ * @acl: ACLs in POSIX ACL format to convert from
+ * @acl_type: the type of POSIX ACLs stored in @acl
+ *
+ * Return: the number cifs ACL entries after conversion
+ */
+static __u16 posix_acl_to_cifs(char *parm_data, const struct posix_acl *acl,
+			       const int acl_type)
+{
+	__u16 rc = 0;
+	struct cifs_posix_acl *cifs_acl = (struct cifs_posix_acl *)parm_data;
+	const struct posix_acl_entry *pa, *pe;
+	int count;
+	int i = 0;
+
+	if ((acl == NULL) || (cifs_acl == NULL))
+		return 0;
+
+	count = acl->a_count;
+	cifs_dbg(FYI, "setting acl with %d entries\n", count);
+
+	/*
+	 * Note that the uapi POSIX ACL version is verified by the VFS and is
+	 * independent of the cifs ACL version. Changing the POSIX ACL version
+	 * is a uapi change and if it's changed we will pass down the POSIX ACL
+	 * version in struct posix_acl from the VFS. For now there's really
+	 * only one that all filesystems know how to deal with.
+	 */
+	cifs_acl->version = cpu_to_le16(1);
+	if (acl_type == ACL_TYPE_ACCESS) {
+		cifs_acl->access_entry_count = cpu_to_le16(count);
+		cifs_acl->default_entry_count = cpu_to_le16(0xFFFF);
+	} else if (acl_type == ACL_TYPE_DEFAULT) {
+		cifs_acl->default_entry_count = cpu_to_le16(count);
+		cifs_acl->access_entry_count = cpu_to_le16(0xFFFF);
+	} else {
+		cifs_dbg(FYI, "unknown ACL type %d\n", acl_type);
+		return 0;
+	}
+	FOREACH_ACL_ENTRY(pa, acl, pe) {
+		cifs_init_ace(&cifs_acl->ace_array[i++], pa);
+	}
+	if (rc == 0) {
+		rc = (__u16)(count * sizeof(struct cifs_posix_ace));
+		rc += sizeof(struct cifs_posix_acl);
+		/* BB add check to make sure ACL does not overflow SMB */
+	}
+	return rc;
+}
+
+int cifs_do_get_acl(const unsigned int xid, struct cifs_tcon *tcon,
+		    const unsigned char *searchName, struct posix_acl **acl,
+		    const int acl_type, const struct nls_table *nls_codepage,
+		    int remap)
+{
+/* SMB_QUERY_POSIX_ACL */
+	TRANSACTION2_QPI_REQ *pSMB = NULL;
+	TRANSACTION2_QPI_RSP *pSMBr = NULL;
+	int rc = 0;
+	int bytes_returned;
+	int name_len;
+	__u16 params, byte_count;
+
+	cifs_dbg(FYI, "In GetPosixACL (Unix) for path %s\n", searchName);
+
+queryAclRetry:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		(void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len =
+			cifsConvertToUTF16((__le16 *) pSMB->FileName,
+					   searchName, PATH_MAX, nls_codepage,
+					   remap);
+		name_len++;     /* trailing null */
+		name_len *= 2;
+		pSMB->FileName[name_len] = 0;
+		pSMB->FileName[name_len+1] = 0;
+	} else {
+		name_len = copy_path_name(pSMB->FileName, searchName);
+	}
+
+	params = 2 /* level */  + 4 /* rsrvd */  + name_len /* incl null */ ;
+	pSMB->TotalDataCount = 0;
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	/* BB find exact max data count below from sess structure BB */
+	pSMB->MaxDataCount = cpu_to_le16(4000);
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	pSMB->ParameterOffset = cpu_to_le16(
+		offsetof(struct smb_com_transaction2_qpi_req,
+			 InformationLevel) - 4);
+	pSMB->DataCount = 0;
+	pSMB->DataOffset = 0;
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
+	byte_count = params + 1 /* pad */ ;
+	pSMB->TotalParameterCount = cpu_to_le16(params);
+	pSMB->ParameterCount = pSMB->TotalParameterCount;
+	pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_POSIX_ACL);
+	pSMB->Reserved4 = 0;
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+		(struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	cifs_stats_inc(&tcon->stats.cifs_stats.num_acl_get);
+	if (rc) {
+		cifs_dbg(FYI, "Send error in Query POSIX ACL = %d\n", rc);
+	} else {
+		/* decode response */
+
+		rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+		/* BB also check enough total bytes returned */
+		if (rc || get_bcc(&pSMBr->hdr) < 2)
+			rc = -EIO;      /* bad smb */
+		else {
+			__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+			__u16 count = le16_to_cpu(pSMBr->t2.DataCount);
+			rc = cifs_to_posix_acl(acl,
+				(char *)&pSMBr->hdr.Protocol+data_offset,
+				acl_type, count);
+		}
+	}
+	cifs_buf_release(pSMB);
+	/*
+	 * The else branch after SendReceive() doesn't return EAGAIN so if we
+	 * allocated @acl in cifs_to_posix_acl() we are guaranteed to return
+	 * here and don't leak POSIX ACLs.
+	 */
+	if (rc == -EAGAIN)
+		goto queryAclRetry;
+	return rc;
+}
+
+int cifs_do_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
+		    const unsigned char *fileName, const struct posix_acl *acl,
+		    const int acl_type, const struct nls_table *nls_codepage,
+		    int remap)
+{
+	struct smb_com_transaction2_spi_req *pSMB = NULL;
+	struct smb_com_transaction2_spi_rsp *pSMBr = NULL;
+	char *parm_data;
+	int name_len;
+	int rc = 0;
+	int bytes_returned = 0;
+	__u16 params, byte_count, data_count, param_offset, offset;
+
+	cifs_dbg(FYI, "In SetPosixACL (Unix) for path %s\n", fileName);
+setAclRetry:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len =
+			cifsConvertToUTF16((__le16 *) pSMB->FileName, fileName,
+					   PATH_MAX, nls_codepage, remap);
+		name_len++;     /* trailing null */
+		name_len *= 2;
+	} else {
+		name_len = copy_path_name(pSMB->FileName, fileName);
+	}
+	params = 6 + name_len;
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	/* BB find max SMB size from sess */
+	pSMB->MaxDataCount = cpu_to_le16(1000);
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	param_offset = offsetof(struct smb_com_transaction2_spi_req,
+				InformationLevel) - 4;
+	offset = param_offset + params;
+	parm_data = ((char *)pSMB) + sizeof(pSMB->hdr.smb_buf_length) + offset;
+	pSMB->ParameterOffset = cpu_to_le16(param_offset);
+
+	/* convert to on the wire format for POSIX ACL */
+	data_count = posix_acl_to_cifs(parm_data, acl, acl_type);
+
+	if (data_count == 0) {
+		rc = -EOPNOTSUPP;
+		goto setACLerrorExit;
+	}
+	pSMB->DataOffset = cpu_to_le16(offset);
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
+	pSMB->InformationLevel = cpu_to_le16(SMB_SET_POSIX_ACL);
+	byte_count = 3 /* pad */  + params + data_count;
+	pSMB->DataCount = cpu_to_le16(data_count);
+	pSMB->TotalDataCount = pSMB->DataCount;
+	pSMB->ParameterCount = cpu_to_le16(params);
+	pSMB->TotalParameterCount = pSMB->ParameterCount;
+	pSMB->Reserved4 = 0;
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc)
+		cifs_dbg(FYI, "Set POSIX ACL returned %d\n", rc);
+
+setACLerrorExit:
+	cifs_buf_release(pSMB);
+	if (rc == -EAGAIN)
+		goto setAclRetry;
+	return rc;
+}
+#else
+int cifs_do_get_acl(const unsigned int xid, struct cifs_tcon *tcon,
+		    const unsigned char *searchName, struct posix_acl **acl,
+		    const int acl_type, const struct nls_table *nls_codepage,
+		    int remap)
+{
+	return -EOPNOTSUPP;
+}
+
+int cifs_do_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
+		    const unsigned char *fileName, const struct posix_acl *acl,
+		    const int acl_type, const struct nls_table *nls_codepage,
+		    int remap)
+{
+	return -EOPNOTSUPP;
+}
+#endif /* CONFIG_FS_POSIX_ACL */
+
+int
+CIFSGetExtAttr(const unsigned int xid, struct cifs_tcon *tcon,
+	       const int netfid, __u64 *pExtAttrBits, __u64 *pMask)
+{
+	int rc = 0;
+	struct smb_t2_qfi_req *pSMB = NULL;
+	struct smb_t2_qfi_rsp *pSMBr = NULL;
+	int bytes_returned;
+	__u16 params, byte_count;
+
+	cifs_dbg(FYI, "In GetExtAttr\n");
+	if (tcon == NULL)
+		return -ENODEV;
+
+GetExtAttrRetry:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	params = 2 /* level */ + 2 /* fid */;
+	pSMB->t2.TotalDataCount = 0;
+	pSMB->t2.MaxParameterCount = cpu_to_le16(4);
+	/* BB find exact max data count below from sess structure BB */
+	pSMB->t2.MaxDataCount = cpu_to_le16(4000);
+	pSMB->t2.MaxSetupCount = 0;
+	pSMB->t2.Reserved = 0;
+	pSMB->t2.Flags = 0;
+	pSMB->t2.Timeout = 0;
+	pSMB->t2.Reserved2 = 0;
+	pSMB->t2.ParameterOffset = cpu_to_le16(offsetof(struct smb_t2_qfi_req,
+					       Fid) - 4);
+	pSMB->t2.DataCount = 0;
+	pSMB->t2.DataOffset = 0;
+	pSMB->t2.SetupCount = 1;
+	pSMB->t2.Reserved3 = 0;
+	pSMB->t2.SubCommand = cpu_to_le16(TRANS2_QUERY_FILE_INFORMATION);
+	byte_count = params + 1 /* pad */ ;
+	pSMB->t2.TotalParameterCount = cpu_to_le16(params);
+	pSMB->t2.ParameterCount = pSMB->t2.TotalParameterCount;
+	pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_ATTR_FLAGS);
+	pSMB->Pad = 0;
+	pSMB->Fid = netfid;
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->t2.ByteCount = cpu_to_le16(byte_count);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc) {
+		cifs_dbg(FYI, "error %d in GetExtAttr\n", rc);
+	} else {
+		/* decode response */
+		rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+		/* BB also check enough total bytes returned */
+		if (rc || get_bcc(&pSMBr->hdr) < 2)
+			/* If rc should we check for EOPNOSUPP and
+			   disable the srvino flag? or in caller? */
+			rc = -EIO;      /* bad smb */
+		else {
+			__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+			__u16 count = le16_to_cpu(pSMBr->t2.DataCount);
+			struct file_chattr_info *pfinfo;
+
+			if (count != 16) {
+				cifs_dbg(FYI, "Invalid size ret in GetExtAttr\n");
+				rc = -EIO;
+				goto GetExtAttrOut;
+			}
+			pfinfo = (struct file_chattr_info *)
+				 (data_offset + (char *) &pSMBr->hdr.Protocol);
+			*pExtAttrBits = le64_to_cpu(pfinfo->mode);
+			*pMask = le64_to_cpu(pfinfo->mask);
+		}
+	}
+GetExtAttrOut:
+	cifs_buf_release(pSMB);
+	if (rc == -EAGAIN)
+		goto GetExtAttrRetry;
+	return rc;
+}
+
+#endif /* CONFIG_POSIX */
+
+/*
+ * Initialize NT TRANSACT SMB into small smb request buffer.  This assumes that
+ * all NT TRANSACTS that we init here have total parm and data under about 400
+ * bytes (to fit in small cifs buffer size), which is the case so far, it
+ * easily fits. NB: Setup words themselves and ByteCount MaxSetupCount (size of
+ * returned setup area) and MaxParameterCount (returned parms size) must be set
+ * by caller
+ */
+static int
+smb_init_nttransact(const __u16 sub_command, const int setup_count,
+		   const int parm_len, struct cifs_tcon *tcon,
+		   void **ret_buf)
+{
+	int rc;
+	__u32 temp_offset;
+	struct smb_com_ntransact_req *pSMB;
+
+	rc = small_smb_init(SMB_COM_NT_TRANSACT, 19 + setup_count, tcon,
+				(void **)&pSMB);
+	if (rc)
+		return rc;
+	*ret_buf = (void *)pSMB;
+	pSMB->Reserved = 0;
+	pSMB->TotalParameterCount = cpu_to_le32(parm_len);
+	pSMB->TotalDataCount  = 0;
+	pSMB->MaxDataCount = cpu_to_le32(CIFSMaxBufSize & 0xFFFFFF00);
+	pSMB->ParameterCount = pSMB->TotalParameterCount;
+	pSMB->DataCount  = pSMB->TotalDataCount;
+	temp_offset = offsetof(struct smb_com_ntransact_req, Parms) +
+			(setup_count * 2) - 4 /* for rfc1001 length itself */;
+	pSMB->ParameterOffset = cpu_to_le32(temp_offset);
+	pSMB->DataOffset = cpu_to_le32(temp_offset + parm_len);
+	pSMB->SetupCount = setup_count; /* no need to le convert byte fields */
+	pSMB->SubCommand = cpu_to_le16(sub_command);
+	return 0;
+}
+
+static int
+validate_ntransact(char *buf, char **ppparm, char **ppdata,
+		   __u32 *pparmlen, __u32 *pdatalen)
+{
+	char *end_of_smb;
+	__u32 data_count, data_offset, parm_count, parm_offset;
+	struct smb_com_ntransact_rsp *pSMBr;
+	u16 bcc;
+
+	*pdatalen = 0;
+	*pparmlen = 0;
+
+	if (buf == NULL)
+		return -EINVAL;
+
+	pSMBr = (struct smb_com_ntransact_rsp *)buf;
+
+	bcc = get_bcc(&pSMBr->hdr);
+	end_of_smb = 2 /* sizeof byte count */ + bcc +
+			(char *)&pSMBr->ByteCount;
+
+	data_offset = le32_to_cpu(pSMBr->DataOffset);
+	data_count = le32_to_cpu(pSMBr->DataCount);
+	parm_offset = le32_to_cpu(pSMBr->ParameterOffset);
+	parm_count = le32_to_cpu(pSMBr->ParameterCount);
+
+	*ppparm = (char *)&pSMBr->hdr.Protocol + parm_offset;
+	*ppdata = (char *)&pSMBr->hdr.Protocol + data_offset;
+
+	/* should we also check that parm and data areas do not overlap? */
+	if (*ppparm > end_of_smb) {
+		cifs_dbg(FYI, "parms start after end of smb\n");
+		return -EINVAL;
+	} else if (parm_count + *ppparm > end_of_smb) {
+		cifs_dbg(FYI, "parm end after end of smb\n");
+		return -EINVAL;
+	} else if (*ppdata > end_of_smb) {
+		cifs_dbg(FYI, "data starts after end of smb\n");
+		return -EINVAL;
+	} else if (data_count + *ppdata > end_of_smb) {
+		cifs_dbg(FYI, "data %p + count %d (%p) past smb end %p start %p\n",
+			 *ppdata, data_count, (data_count + *ppdata),
+			 end_of_smb, pSMBr);
+		return -EINVAL;
+	} else if (parm_count + data_count > bcc) {
+		cifs_dbg(FYI, "parm count and data count larger than SMB\n");
+		return -EINVAL;
+	}
+	*pdatalen = data_count;
+	*pparmlen = parm_count;
+	return 0;
+}
+
+/* Get Security Descriptor (by handle) from remote server for a file or dir */
+int
+CIFSSMBGetCIFSACL(const unsigned int xid, struct cifs_tcon *tcon, __u16 fid,
+		  struct cifs_ntsd **acl_inf, __u32 *pbuflen)
+{
+	int rc = 0;
+	int buf_type = 0;
+	QUERY_SEC_DESC_REQ *pSMB;
+	struct kvec iov[1];
+	struct kvec rsp_iov;
+
+	cifs_dbg(FYI, "GetCifsACL\n");
+
+	*pbuflen = 0;
+	*acl_inf = NULL;
+
+	rc = smb_init_nttransact(NT_TRANSACT_QUERY_SECURITY_DESC, 0,
+			8 /* parm len */, tcon, (void **) &pSMB);
+	if (rc)
+		return rc;
+
+	pSMB->MaxParameterCount = cpu_to_le32(4);
+	/* BB TEST with big acls that might need to be e.g. larger than 16K */
+	pSMB->MaxSetupCount = 0;
+	pSMB->Fid = fid; /* file handle always le */
+	pSMB->AclFlags = cpu_to_le32(CIFS_ACL_OWNER | CIFS_ACL_GROUP |
+				     CIFS_ACL_DACL);
+	pSMB->ByteCount = cpu_to_le16(11); /* 3 bytes pad + 8 bytes parm */
+	inc_rfc1001_len(pSMB, 11);
+	iov[0].iov_base = (char *)pSMB;
+	iov[0].iov_len = be32_to_cpu(pSMB->hdr.smb_buf_length) + 4;
+
+	rc = SendReceive2(xid, tcon->ses, iov, 1 /* num iovec */, &buf_type,
+			  0, &rsp_iov);
+	cifs_small_buf_release(pSMB);
+	cifs_stats_inc(&tcon->stats.cifs_stats.num_acl_get);
+	if (rc) {
+		cifs_dbg(FYI, "Send error in QuerySecDesc = %d\n", rc);
+	} else {                /* decode response */
+		__le32 *parm;
+		__u32 parm_len;
+		__u32 acl_len;
+		struct smb_com_ntransact_rsp *pSMBr;
+		char *pdata;
+
+/* validate_nttransact */
+		rc = validate_ntransact(rsp_iov.iov_base, (char **)&parm,
+					&pdata, &parm_len, pbuflen);
+		if (rc)
+			goto qsec_out;
+		pSMBr = (struct smb_com_ntransact_rsp *)rsp_iov.iov_base;
+
+		cifs_dbg(FYI, "smb %p parm %p data %p\n",
+			 pSMBr, parm, *acl_inf);
+
+		if (le32_to_cpu(pSMBr->ParameterCount) != 4) {
+			rc = -EIO;      /* bad smb */
+			*pbuflen = 0;
+			goto qsec_out;
+		}
+
+/* BB check that data area is minimum length and as big as acl_len */
+
+		acl_len = le32_to_cpu(*parm);
+		if (acl_len != *pbuflen) {
+			cifs_dbg(VFS, "acl length %d does not match %d\n",
+				 acl_len, *pbuflen);
+			if (*pbuflen > acl_len)
+				*pbuflen = acl_len;
+		}
+
+		/* check if buffer is big enough for the acl
+		   header followed by the smallest SID */
+		if ((*pbuflen < sizeof(struct cifs_ntsd) + 8) ||
+		    (*pbuflen >= 64 * 1024)) {
+			cifs_dbg(VFS, "bad acl length %d\n", *pbuflen);
+			rc = -EINVAL;
+			*pbuflen = 0;
+		} else {
+			*acl_inf = kmemdup(pdata, *pbuflen, GFP_KERNEL);
+			if (*acl_inf == NULL) {
+				*pbuflen = 0;
+				rc = -ENOMEM;
+			}
+		}
+	}
+qsec_out:
+	free_rsp_buf(buf_type, rsp_iov.iov_base);
+	return rc;
+}
+
+int
+CIFSSMBSetCIFSACL(const unsigned int xid, struct cifs_tcon *tcon, __u16 fid,
+			struct cifs_ntsd *pntsd, __u32 acllen, int aclflag)
+{
+	__u16 byte_count, param_count, data_count, param_offset, data_offset;
+	int rc = 0;
+	int bytes_returned = 0;
+	SET_SEC_DESC_REQ *pSMB = NULL;
+	void *pSMBr;
+
+setCifsAclRetry:
+	rc = smb_init(SMB_COM_NT_TRANSACT, 19, tcon, (void **) &pSMB, &pSMBr);
+	if (rc)
+		return rc;
+
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+
+	param_count = 8;
+	param_offset = offsetof(struct smb_com_transaction_ssec_req, Fid) - 4;
+	data_count = acllen;
+	data_offset = param_offset + param_count;
+	byte_count = 3 /* pad */  + param_count;
+
+	pSMB->DataCount = cpu_to_le32(data_count);
+	pSMB->TotalDataCount = pSMB->DataCount;
+	pSMB->MaxParameterCount = cpu_to_le32(4);
+	pSMB->MaxDataCount = cpu_to_le32(16384);
+	pSMB->ParameterCount = cpu_to_le32(param_count);
+	pSMB->ParameterOffset = cpu_to_le32(param_offset);
+	pSMB->TotalParameterCount = pSMB->ParameterCount;
+	pSMB->DataOffset = cpu_to_le32(data_offset);
+	pSMB->SetupCount = 0;
+	pSMB->SubCommand = cpu_to_le16(NT_TRANSACT_SET_SECURITY_DESC);
+	pSMB->ByteCount = cpu_to_le16(byte_count+data_count);
+
+	pSMB->Fid = fid; /* file handle always le */
+	pSMB->Reserved2 = 0;
+	pSMB->AclFlags = cpu_to_le32(aclflag);
+
+	if (pntsd && acllen) {
+		memcpy((char *)pSMBr + offsetof(struct smb_hdr, Protocol) +
+				data_offset, pntsd, acllen);
+		inc_rfc1001_len(pSMB, byte_count + data_count);
+	} else
+		inc_rfc1001_len(pSMB, byte_count);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+		(struct smb_hdr *) pSMBr, &bytes_returned, 0);
+
+	cifs_dbg(FYI, "SetCIFSACL bytes_returned: %d, rc: %d\n",
+		 bytes_returned, rc);
+	if (rc)
+		cifs_dbg(FYI, "Set CIFS ACL returned %d\n", rc);
+	cifs_buf_release(pSMB);
+
+	if (rc == -EAGAIN)
+		goto setCifsAclRetry;
+
+	return (rc);
+}
+
+
+/* Legacy Query Path Information call for lookup to old servers such
+   as Win9x/WinME */
+int
+SMBQueryInformation(const unsigned int xid, struct cifs_tcon *tcon,
+		    const char *search_name, FILE_ALL_INFO *data,
+		    const struct nls_table *nls_codepage, int remap)
+{
+	QUERY_INFORMATION_REQ *pSMB;
+	QUERY_INFORMATION_RSP *pSMBr;
+	int rc = 0;
+	int bytes_returned;
+	int name_len;
+
+	cifs_dbg(FYI, "In SMBQPath path %s\n", search_name);
+QInfRetry:
+	rc = smb_init(SMB_COM_QUERY_INFORMATION, 0, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len =
+			cifsConvertToUTF16((__le16 *) pSMB->FileName,
+					   search_name, PATH_MAX, nls_codepage,
+					   remap);
+		name_len++;     /* trailing null */
+		name_len *= 2;
+	} else {
+		name_len = copy_path_name(pSMB->FileName, search_name);
+	}
+	pSMB->BufferFormat = 0x04;
+	name_len++; /* account for buffer type byte */
+	inc_rfc1001_len(pSMB, (__u16)name_len);
+	pSMB->ByteCount = cpu_to_le16(name_len);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc) {
+		cifs_dbg(FYI, "Send error in QueryInfo = %d\n", rc);
+	} else if (data) {
+		struct timespec64 ts;
+		__u32 time = le32_to_cpu(pSMBr->last_write_time);
+
+		/* decode response */
+		/* BB FIXME - add time zone adjustment BB */
+		memset(data, 0, sizeof(FILE_ALL_INFO));
+		ts.tv_nsec = 0;
+		ts.tv_sec = time;
+		/* decode time fields */
+		data->ChangeTime = cpu_to_le64(cifs_UnixTimeToNT(ts));
+		data->LastWriteTime = data->ChangeTime;
+		data->LastAccessTime = 0;
+		data->AllocationSize =
+			cpu_to_le64(le32_to_cpu(pSMBr->size));
+		data->EndOfFile = data->AllocationSize;
+		data->Attributes =
+			cpu_to_le32(le16_to_cpu(pSMBr->attr));
+	} else
+		rc = -EIO; /* bad buffer passed in */
+
+	cifs_buf_release(pSMB);
+
+	if (rc == -EAGAIN)
+		goto QInfRetry;
+
+	return rc;
+}
+
+int
+CIFSSMBQFileInfo(const unsigned int xid, struct cifs_tcon *tcon,
+		 u16 netfid, FILE_ALL_INFO *pFindData)
+{
+	struct smb_t2_qfi_req *pSMB = NULL;
+	struct smb_t2_qfi_rsp *pSMBr = NULL;
+	int rc = 0;
+	int bytes_returned;
+	__u16 params, byte_count;
+
+QFileInfoRetry:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	params = 2 /* level */ + 2 /* fid */;
+	pSMB->t2.TotalDataCount = 0;
+	pSMB->t2.MaxParameterCount = cpu_to_le16(4);
+	/* BB find exact max data count below from sess structure BB */
+	pSMB->t2.MaxDataCount = cpu_to_le16(CIFSMaxBufSize);
+	pSMB->t2.MaxSetupCount = 0;
+	pSMB->t2.Reserved = 0;
+	pSMB->t2.Flags = 0;
+	pSMB->t2.Timeout = 0;
+	pSMB->t2.Reserved2 = 0;
+	pSMB->t2.ParameterOffset = cpu_to_le16(offsetof(struct smb_t2_qfi_req,
+					       Fid) - 4);
+	pSMB->t2.DataCount = 0;
+	pSMB->t2.DataOffset = 0;
+	pSMB->t2.SetupCount = 1;
+	pSMB->t2.Reserved3 = 0;
+	pSMB->t2.SubCommand = cpu_to_le16(TRANS2_QUERY_FILE_INFORMATION);
+	byte_count = params + 1 /* pad */ ;
+	pSMB->t2.TotalParameterCount = cpu_to_le16(params);
+	pSMB->t2.ParameterCount = pSMB->t2.TotalParameterCount;
+	pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_ALL_INFO);
+	pSMB->Pad = 0;
+	pSMB->Fid = netfid;
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->t2.ByteCount = cpu_to_le16(byte_count);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc) {
+		cifs_dbg(FYI, "Send error in QFileInfo = %d\n", rc);
+	} else {		/* decode response */
+		rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+		if (rc) /* BB add auto retry on EOPNOTSUPP? */
+			rc = -EIO;
+		else if (get_bcc(&pSMBr->hdr) < 40)
+			rc = -EIO;	/* bad smb */
+		else if (pFindData) {
+			__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+			memcpy((char *) pFindData,
+			       (char *) &pSMBr->hdr.Protocol +
+			       data_offset, sizeof(FILE_ALL_INFO));
+		} else
+		    rc = -ENOMEM;
+	}
+	cifs_buf_release(pSMB);
+	if (rc == -EAGAIN)
+		goto QFileInfoRetry;
+
+	return rc;
+}
+
+int
+CIFSSMBQPathInfo(const unsigned int xid, struct cifs_tcon *tcon,
+		 const char *search_name, FILE_ALL_INFO *data,
+		 int legacy /* old style infolevel */,
+		 const struct nls_table *nls_codepage, int remap)
+{
+	/* level 263 SMB_QUERY_FILE_ALL_INFO */
+	TRANSACTION2_QPI_REQ *pSMB = NULL;
+	TRANSACTION2_QPI_RSP *pSMBr = NULL;
+	int rc = 0;
+	int bytes_returned;
+	int name_len;
+	__u16 params, byte_count;
+
+	/* cifs_dbg(FYI, "In QPathInfo path %s\n", search_name); */
+QPathInfoRetry:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len =
+		    cifsConvertToUTF16((__le16 *) pSMB->FileName, search_name,
+				       PATH_MAX, nls_codepage, remap);
+		name_len++;	/* trailing null */
+		name_len *= 2;
+	} else {
+		name_len = copy_path_name(pSMB->FileName, search_name);
+	}
+
+	params = 2 /* level */ + 4 /* reserved */ + name_len /* includes NUL */;
+	pSMB->TotalDataCount = 0;
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	/* BB find exact max SMB PDU from sess structure BB */
+	pSMB->MaxDataCount = cpu_to_le16(4000);
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	pSMB->ParameterOffset = cpu_to_le16(offsetof(
+	struct smb_com_transaction2_qpi_req, InformationLevel) - 4);
+	pSMB->DataCount = 0;
+	pSMB->DataOffset = 0;
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
+	byte_count = params + 1 /* pad */ ;
+	pSMB->TotalParameterCount = cpu_to_le16(params);
+	pSMB->ParameterCount = pSMB->TotalParameterCount;
+	if (legacy)
+		pSMB->InformationLevel = cpu_to_le16(SMB_INFO_STANDARD);
+	else
+		pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_ALL_INFO);
+	pSMB->Reserved4 = 0;
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc) {
+		cifs_dbg(FYI, "Send error in QPathInfo = %d\n", rc);
+	} else {		/* decode response */
+		rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+		if (rc) /* BB add auto retry on EOPNOTSUPP? */
+			rc = -EIO;
+		else if (!legacy && get_bcc(&pSMBr->hdr) < 40)
+			rc = -EIO;	/* bad smb */
+		else if (legacy && get_bcc(&pSMBr->hdr) < 24)
+			rc = -EIO;  /* 24 or 26 expected but we do not read
+					last field */
+		else if (data) {
+			int size;
+			__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+
+			/*
+			 * On legacy responses we do not read the last field,
+			 * EAsize, fortunately since it varies by subdialect and
+			 * also note it differs on Set vs Get, ie two bytes or 4
+			 * bytes depending but we don't care here.
+			 */
+			if (legacy)
+				size = sizeof(FILE_INFO_STANDARD);
+			else
+				size = sizeof(FILE_ALL_INFO);
+			memcpy((char *) data, (char *) &pSMBr->hdr.Protocol +
+			       data_offset, size);
+		} else
+		    rc = -ENOMEM;
+	}
+	cifs_buf_release(pSMB);
+	if (rc == -EAGAIN)
+		goto QPathInfoRetry;
+
+	return rc;
+}
+
+int
+CIFSSMBUnixQFileInfo(const unsigned int xid, struct cifs_tcon *tcon,
+		 u16 netfid, FILE_UNIX_BASIC_INFO *pFindData)
+{
+	struct smb_t2_qfi_req *pSMB = NULL;
+	struct smb_t2_qfi_rsp *pSMBr = NULL;
+	int rc = 0;
+	int bytes_returned;
+	__u16 params, byte_count;
+
+UnixQFileInfoRetry:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	params = 2 /* level */ + 2 /* fid */;
+	pSMB->t2.TotalDataCount = 0;
+	pSMB->t2.MaxParameterCount = cpu_to_le16(4);
+	/* BB find exact max data count below from sess structure BB */
+	pSMB->t2.MaxDataCount = cpu_to_le16(CIFSMaxBufSize);
+	pSMB->t2.MaxSetupCount = 0;
+	pSMB->t2.Reserved = 0;
+	pSMB->t2.Flags = 0;
+	pSMB->t2.Timeout = 0;
+	pSMB->t2.Reserved2 = 0;
+	pSMB->t2.ParameterOffset = cpu_to_le16(offsetof(struct smb_t2_qfi_req,
+					       Fid) - 4);
+	pSMB->t2.DataCount = 0;
+	pSMB->t2.DataOffset = 0;
+	pSMB->t2.SetupCount = 1;
+	pSMB->t2.Reserved3 = 0;
+	pSMB->t2.SubCommand = cpu_to_le16(TRANS2_QUERY_FILE_INFORMATION);
+	byte_count = params + 1 /* pad */ ;
+	pSMB->t2.TotalParameterCount = cpu_to_le16(params);
+	pSMB->t2.ParameterCount = pSMB->t2.TotalParameterCount;
+	pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_UNIX_BASIC);
+	pSMB->Pad = 0;
+	pSMB->Fid = netfid;
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->t2.ByteCount = cpu_to_le16(byte_count);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc) {
+		cifs_dbg(FYI, "Send error in UnixQFileInfo = %d\n", rc);
+	} else {		/* decode response */
+		rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+		if (rc || get_bcc(&pSMBr->hdr) < sizeof(FILE_UNIX_BASIC_INFO)) {
+			cifs_dbg(VFS, "Malformed FILE_UNIX_BASIC_INFO response. Unix Extensions can be disabled on mount by specifying the nosfu mount option.\n");
+			rc = -EIO;	/* bad smb */
+		} else {
+			__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+			memcpy((char *) pFindData,
+			       (char *) &pSMBr->hdr.Protocol +
+			       data_offset,
+			       sizeof(FILE_UNIX_BASIC_INFO));
+		}
+	}
+
+	cifs_buf_release(pSMB);
+	if (rc == -EAGAIN)
+		goto UnixQFileInfoRetry;
+
+	return rc;
+}
+
+int
+CIFSSMBUnixQPathInfo(const unsigned int xid, struct cifs_tcon *tcon,
+		     const unsigned char *searchName,
+		     FILE_UNIX_BASIC_INFO *pFindData,
+		     const struct nls_table *nls_codepage, int remap)
+{
+/* SMB_QUERY_FILE_UNIX_BASIC */
+	TRANSACTION2_QPI_REQ *pSMB = NULL;
+	TRANSACTION2_QPI_RSP *pSMBr = NULL;
+	int rc = 0;
+	int bytes_returned = 0;
+	int name_len;
+	__u16 params, byte_count;
+
+	cifs_dbg(FYI, "In QPathInfo (Unix) the path %s\n", searchName);
+UnixQPathInfoRetry:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len =
+		    cifsConvertToUTF16((__le16 *) pSMB->FileName, searchName,
+				       PATH_MAX, nls_codepage, remap);
+		name_len++;	/* trailing null */
+		name_len *= 2;
+	} else {
+		name_len = copy_path_name(pSMB->FileName, searchName);
+	}
+
+	params = 2 /* level */ + 4 /* reserved */ + name_len /* includes NUL */;
+	pSMB->TotalDataCount = 0;
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	/* BB find exact max SMB PDU from sess structure BB */
+	pSMB->MaxDataCount = cpu_to_le16(4000);
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	pSMB->ParameterOffset = cpu_to_le16(offsetof(
+	struct smb_com_transaction2_qpi_req, InformationLevel) - 4);
+	pSMB->DataCount = 0;
+	pSMB->DataOffset = 0;
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
+	byte_count = params + 1 /* pad */ ;
+	pSMB->TotalParameterCount = cpu_to_le16(params);
+	pSMB->ParameterCount = pSMB->TotalParameterCount;
+	pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_UNIX_BASIC);
+	pSMB->Reserved4 = 0;
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc) {
+		cifs_dbg(FYI, "Send error in UnixQPathInfo = %d\n", rc);
+	} else {		/* decode response */
+		rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+		if (rc || get_bcc(&pSMBr->hdr) < sizeof(FILE_UNIX_BASIC_INFO)) {
+			cifs_dbg(VFS, "Malformed FILE_UNIX_BASIC_INFO response. Unix Extensions can be disabled on mount by specifying the nosfu mount option.\n");
+			rc = -EIO;	/* bad smb */
+		} else {
+			__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+			memcpy((char *) pFindData,
+			       (char *) &pSMBr->hdr.Protocol +
+			       data_offset,
+			       sizeof(FILE_UNIX_BASIC_INFO));
+		}
+	}
+	cifs_buf_release(pSMB);
+	if (rc == -EAGAIN)
+		goto UnixQPathInfoRetry;
+
+	return rc;
+}
+
+/* xid, tcon, searchName and codepage are input parms, rest are returned */
+int
+CIFSFindFirst(const unsigned int xid, struct cifs_tcon *tcon,
+	      const char *searchName, struct cifs_sb_info *cifs_sb,
+	      __u16 *pnetfid, __u16 search_flags,
+	      struct cifs_search_info *psrch_inf, bool msearch)
+{
+/* level 257 SMB_ */
+	TRANSACTION2_FFIRST_REQ *pSMB = NULL;
+	TRANSACTION2_FFIRST_RSP *pSMBr = NULL;
+	T2_FFIRST_RSP_PARMS *parms;
+	struct nls_table *nls_codepage;
+	unsigned int lnoff;
+	__u16 params, byte_count;
+	int bytes_returned = 0;
+	int name_len, remap;
+	int rc = 0;
+
+	cifs_dbg(FYI, "In FindFirst for %s\n", searchName);
+
+findFirstRetry:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	nls_codepage = cifs_sb->local_nls;
+	remap = cifs_remap(cifs_sb);
+
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len =
+		    cifsConvertToUTF16((__le16 *) pSMB->FileName, searchName,
+				       PATH_MAX, nls_codepage, remap);
+		/* We can not add the asterik earlier in case
+		it got remapped to 0xF03A as if it were part of the
+		directory name instead of a wildcard */
+		name_len *= 2;
+		if (msearch) {
+			pSMB->FileName[name_len] = CIFS_DIR_SEP(cifs_sb);
+			pSMB->FileName[name_len+1] = 0;
+			pSMB->FileName[name_len+2] = '*';
+			pSMB->FileName[name_len+3] = 0;
+			name_len += 4; /* now the trailing null */
+			/* null terminate just in case */
+			pSMB->FileName[name_len] = 0;
+			pSMB->FileName[name_len+1] = 0;
+			name_len += 2;
+		}
+	} else {
+		name_len = copy_path_name(pSMB->FileName, searchName);
+		if (msearch) {
+			if (WARN_ON_ONCE(name_len > PATH_MAX-2))
+				name_len = PATH_MAX-2;
+			/* overwrite nul byte */
+			pSMB->FileName[name_len-1] = CIFS_DIR_SEP(cifs_sb);
+			pSMB->FileName[name_len] = '*';
+			pSMB->FileName[name_len+1] = 0;
+			name_len += 2;
+		}
+	}
+
+	params = 12 + name_len /* includes null */ ;
+	pSMB->TotalDataCount = 0;	/* no EAs */
+	pSMB->MaxParameterCount = cpu_to_le16(10);
+	pSMB->MaxDataCount = cpu_to_le16(CIFSMaxBufSize & 0xFFFFFF00);
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	byte_count = params + 1 /* pad */ ;
+	pSMB->TotalParameterCount = cpu_to_le16(params);
+	pSMB->ParameterCount = pSMB->TotalParameterCount;
+	pSMB->ParameterOffset = cpu_to_le16(
+	      offsetof(struct smb_com_transaction2_ffirst_req, SearchAttributes)
+		- 4);
+	pSMB->DataCount = 0;
+	pSMB->DataOffset = 0;
+	pSMB->SetupCount = 1;	/* one byte, no need to make endian neutral */
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_FIND_FIRST);
+	pSMB->SearchAttributes =
+	    cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM |
+			ATTR_DIRECTORY);
+	pSMB->SearchCount = cpu_to_le16(CIFSMaxBufSize/sizeof(FILE_UNIX_INFO));
+	pSMB->SearchFlags = cpu_to_le16(search_flags);
+	pSMB->InformationLevel = cpu_to_le16(psrch_inf->info_level);
+
+	/* BB what should we set StorageType to? Does it matter? BB */
+	pSMB->SearchStorageType = 0;
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	cifs_stats_inc(&tcon->stats.cifs_stats.num_ffirst);
+
+	if (rc) {
+		/*
+		 * BB: add logic to retry regular search if Unix search rejected
+		 * unexpectedly by server.
+		 */
+		/* BB: add code to handle unsupported level rc */
+		cifs_dbg(FYI, "Error in FindFirst = %d\n", rc);
+		cifs_buf_release(pSMB);
+		/*
+		 * BB: eventually could optimize out free and realloc of buf for
+		 * this case.
+		 */
+		if (rc == -EAGAIN)
+			goto findFirstRetry;
+		return rc;
+	}
+	/* decode response */
+	rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+	if (rc) {
+		cifs_buf_release(pSMB);
+		return rc;
+	}
+
+	psrch_inf->unicode = !!(pSMBr->hdr.Flags2 & SMBFLG2_UNICODE);
+	psrch_inf->ntwrk_buf_start = (char *)pSMBr;
+	psrch_inf->smallBuf = false;
+	psrch_inf->srch_entries_start = (char *)&pSMBr->hdr.Protocol +
+		le16_to_cpu(pSMBr->t2.DataOffset);
+
+	parms = (T2_FFIRST_RSP_PARMS *)((char *)&pSMBr->hdr.Protocol +
+					le16_to_cpu(pSMBr->t2.ParameterOffset));
+	psrch_inf->endOfSearch = !!parms->EndofSearch;
+
+	psrch_inf->entries_in_buffer = le16_to_cpu(parms->SearchCount);
+	psrch_inf->index_of_last_entry = 2 /* skip . and .. */ +
+		psrch_inf->entries_in_buffer;
+	lnoff = le16_to_cpu(parms->LastNameOffset);
+	if (CIFSMaxBufSize < lnoff) {
+		cifs_dbg(VFS, "ignoring corrupt resume name\n");
+		psrch_inf->last_entry = NULL;
+	} else {
+		psrch_inf->last_entry = psrch_inf->srch_entries_start + lnoff;
+		if (pnetfid)
+			*pnetfid = parms->SearchHandle;
+	}
+	return 0;
+}
+
+int CIFSFindNext(const unsigned int xid, struct cifs_tcon *tcon,
+		 __u16 searchHandle, __u16 search_flags,
+		 struct cifs_search_info *psrch_inf)
+{
+	TRANSACTION2_FNEXT_REQ *pSMB = NULL;
+	TRANSACTION2_FNEXT_RSP *pSMBr = NULL;
+	T2_FNEXT_RSP_PARMS *parms;
+	unsigned int name_len;
+	unsigned int lnoff;
+	__u16 params, byte_count;
+	char *response_data;
+	int bytes_returned;
+	int rc = 0;
+
+	cifs_dbg(FYI, "In FindNext\n");
+
+	if (psrch_inf->endOfSearch)
+		return -ENOENT;
+
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		(void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	params = 14; /* includes 2 bytes of null string, converted to LE below*/
+	byte_count = 0;
+	pSMB->TotalDataCount = 0;       /* no EAs */
+	pSMB->MaxParameterCount = cpu_to_le16(8);
+	pSMB->MaxDataCount = cpu_to_le16(CIFSMaxBufSize & 0xFFFFFF00);
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	pSMB->ParameterOffset =  cpu_to_le16(
+	      offsetof(struct smb_com_transaction2_fnext_req,SearchHandle) - 4);
+	pSMB->DataCount = 0;
+	pSMB->DataOffset = 0;
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_FIND_NEXT);
+	pSMB->SearchHandle = searchHandle;      /* always kept as le */
+	pSMB->SearchCount =
+		cpu_to_le16(CIFSMaxBufSize / sizeof(FILE_UNIX_INFO));
+	pSMB->InformationLevel = cpu_to_le16(psrch_inf->info_level);
+	pSMB->ResumeKey = psrch_inf->resume_key;
+	pSMB->SearchFlags = cpu_to_le16(search_flags);
+
+	name_len = psrch_inf->resume_name_len;
+	params += name_len;
+	if (name_len < PATH_MAX) {
+		memcpy(pSMB->ResumeFileName, psrch_inf->presume_name, name_len);
+		byte_count += name_len;
+		/* 14 byte parm len above enough for 2 byte null terminator */
+		pSMB->ResumeFileName[name_len] = 0;
+		pSMB->ResumeFileName[name_len+1] = 0;
+	} else {
+		cifs_buf_release(pSMB);
+		return -EINVAL;
+	}
+	byte_count = params + 1 /* pad */ ;
+	pSMB->TotalParameterCount = cpu_to_le16(params);
+	pSMB->ParameterCount = pSMB->TotalParameterCount;
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			(struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	cifs_stats_inc(&tcon->stats.cifs_stats.num_fnext);
+
+	if (rc) {
+		cifs_buf_release(pSMB);
+		if (rc == -EBADF) {
+			psrch_inf->endOfSearch = true;
+			rc = 0; /* search probably was closed at end of search*/
+		} else {
+			cifs_dbg(FYI, "FindNext returned = %d\n", rc);
+		}
+		return rc;
+	}
+
+	/* decode response */
+	rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+	if (rc) {
+		cifs_buf_release(pSMB);
+		return rc;
+	}
+	/* BB fixme add lock for file (srch_info) struct here */
+	psrch_inf->unicode = !!(pSMBr->hdr.Flags2 & SMBFLG2_UNICODE);
+	response_data = (char *)&pSMBr->hdr.Protocol +
+		le16_to_cpu(pSMBr->t2.ParameterOffset);
+	parms = (T2_FNEXT_RSP_PARMS *)response_data;
+	response_data = (char *)&pSMBr->hdr.Protocol +
+		le16_to_cpu(pSMBr->t2.DataOffset);
+
+	if (psrch_inf->smallBuf)
+		cifs_small_buf_release(psrch_inf->ntwrk_buf_start);
+	else
+		cifs_buf_release(psrch_inf->ntwrk_buf_start);
+
+	psrch_inf->srch_entries_start = response_data;
+	psrch_inf->ntwrk_buf_start = (char *)pSMB;
+	psrch_inf->smallBuf = false;
+	psrch_inf->endOfSearch = !!parms->EndofSearch;
+	psrch_inf->entries_in_buffer = le16_to_cpu(parms->SearchCount);
+	psrch_inf->index_of_last_entry += psrch_inf->entries_in_buffer;
+	lnoff = le16_to_cpu(parms->LastNameOffset);
+	if (CIFSMaxBufSize < lnoff) {
+		cifs_dbg(VFS, "ignoring corrupt resume name\n");
+		psrch_inf->last_entry = NULL;
+	} else {
+		psrch_inf->last_entry =
+			psrch_inf->srch_entries_start + lnoff;
+	}
+	/* BB fixme add unlock here */
+
+	/*
+	 * BB: On error, should we leave previous search buf
+	 * (and count and last entry fields) intact or free the previous one?
+	 *
+	 * Note: On -EAGAIN error only caller can retry on handle based calls
+	 * since file handle passed in no longer valid.
+	 */
+	return 0;
+}
+
+int
+CIFSFindClose(const unsigned int xid, struct cifs_tcon *tcon,
+	      const __u16 searchHandle)
+{
+	int rc = 0;
+	FINDCLOSE_REQ *pSMB = NULL;
+
+	cifs_dbg(FYI, "In CIFSSMBFindClose\n");
+	rc = small_smb_init(SMB_COM_FIND_CLOSE2, 1, tcon, (void **)&pSMB);
+
+	/* no sense returning error if session restarted
+		as file handle has been closed */
+	if (rc == -EAGAIN)
+		return 0;
+	if (rc)
+		return rc;
+
+	pSMB->FileID = searchHandle;
+	pSMB->ByteCount = 0;
+	rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0);
+	cifs_small_buf_release(pSMB);
+	if (rc)
+		cifs_dbg(VFS, "Send error in FindClose = %d\n", rc);
+
+	cifs_stats_inc(&tcon->stats.cifs_stats.num_fclose);
+
+	/* Since session is dead, search handle closed on server already */
+	if (rc == -EAGAIN)
+		rc = 0;
+
+	return rc;
+}
+
+int
+CIFSGetSrvInodeNumber(const unsigned int xid, struct cifs_tcon *tcon,
+		      const char *search_name, __u64 *inode_number,
+		      const struct nls_table *nls_codepage, int remap)
+{
+	int rc = 0;
+	TRANSACTION2_QPI_REQ *pSMB = NULL;
+	TRANSACTION2_QPI_RSP *pSMBr = NULL;
+	int name_len, bytes_returned;
+	__u16 params, byte_count;
+
+	cifs_dbg(FYI, "In GetSrvInodeNum for %s\n", search_name);
+	if (tcon == NULL)
+		return -ENODEV;
+
+GetInodeNumberRetry:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len =
+			cifsConvertToUTF16((__le16 *) pSMB->FileName,
+					   search_name, PATH_MAX, nls_codepage,
+					   remap);
+		name_len++;     /* trailing null */
+		name_len *= 2;
+	} else {
+		name_len = copy_path_name(pSMB->FileName, search_name);
+	}
+
+	params = 2 /* level */  + 4 /* rsrvd */  + name_len /* incl null */ ;
+	pSMB->TotalDataCount = 0;
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	/* BB find exact max data count below from sess structure BB */
+	pSMB->MaxDataCount = cpu_to_le16(4000);
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	pSMB->ParameterOffset = cpu_to_le16(offsetof(
+		struct smb_com_transaction2_qpi_req, InformationLevel) - 4);
+	pSMB->DataCount = 0;
+	pSMB->DataOffset = 0;
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
+	byte_count = params + 1 /* pad */ ;
+	pSMB->TotalParameterCount = cpu_to_le16(params);
+	pSMB->ParameterCount = pSMB->TotalParameterCount;
+	pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_INTERNAL_INFO);
+	pSMB->Reserved4 = 0;
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+		(struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc) {
+		cifs_dbg(FYI, "error %d in QueryInternalInfo\n", rc);
+	} else {
+		/* decode response */
+		rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+		/* BB also check enough total bytes returned */
+		if (rc || get_bcc(&pSMBr->hdr) < 2)
+			/* If rc should we check for EOPNOSUPP and
+			disable the srvino flag? or in caller? */
+			rc = -EIO;      /* bad smb */
+		else {
+			__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+			__u16 count = le16_to_cpu(pSMBr->t2.DataCount);
+			struct file_internal_info *pfinfo;
+			/* BB Do we need a cast or hash here ? */
+			if (count < 8) {
+				cifs_dbg(FYI, "Invalid size ret in QryIntrnlInf\n");
+				rc = -EIO;
+				goto GetInodeNumOut;
+			}
+			pfinfo = (struct file_internal_info *)
+				(data_offset + (char *) &pSMBr->hdr.Protocol);
+			*inode_number = le64_to_cpu(pfinfo->UniqueId);
+		}
+	}
+GetInodeNumOut:
+	cifs_buf_release(pSMB);
+	if (rc == -EAGAIN)
+		goto GetInodeNumberRetry;
+	return rc;
+}
+
+int
+CIFSGetDFSRefer(const unsigned int xid, struct cifs_ses *ses,
+		const char *search_name, struct dfs_info3_param **target_nodes,
+		unsigned int *num_of_nodes,
+		const struct nls_table *nls_codepage, int remap)
+{
+/* TRANS2_GET_DFS_REFERRAL */
+	TRANSACTION2_GET_DFS_REFER_REQ *pSMB = NULL;
+	TRANSACTION2_GET_DFS_REFER_RSP *pSMBr = NULL;
+	int rc = 0;
+	int bytes_returned;
+	int name_len;
+	__u16 params, byte_count;
+	*num_of_nodes = 0;
+	*target_nodes = NULL;
+
+	cifs_dbg(FYI, "In GetDFSRefer the path %s\n", search_name);
+	if (ses == NULL || ses->tcon_ipc == NULL)
+		return -ENODEV;
+
+getDFSRetry:
+	/*
+	 * Use smb_init_no_reconnect() instead of smb_init() as
+	 * CIFSGetDFSRefer() may be called from cifs_reconnect_tcon() and thus
+	 * causing an infinite recursion.
+	 */
+	rc = smb_init_no_reconnect(SMB_COM_TRANSACTION2, 15, ses->tcon_ipc,
+				   (void **)&pSMB, (void **)&pSMBr);
+	if (rc)
+		return rc;
+
+	/* server pointer checked in called function,
+	but should never be null here anyway */
+	pSMB->hdr.Mid = get_next_mid(ses->server);
+	pSMB->hdr.Tid = ses->tcon_ipc->tid;
+	pSMB->hdr.Uid = ses->Suid;
+	if (ses->capabilities & CAP_STATUS32)
+		pSMB->hdr.Flags2 |= SMBFLG2_ERR_STATUS;
+	if (ses->capabilities & CAP_DFS)
+		pSMB->hdr.Flags2 |= SMBFLG2_DFS;
+
+	if (ses->capabilities & CAP_UNICODE) {
+		pSMB->hdr.Flags2 |= SMBFLG2_UNICODE;
+		name_len =
+		    cifsConvertToUTF16((__le16 *) pSMB->RequestFileName,
+				       search_name, PATH_MAX, nls_codepage,
+				       remap);
+		name_len++;	/* trailing null */
+		name_len *= 2;
+	} else {	/* BB improve the check for buffer overruns BB */
+		name_len = copy_path_name(pSMB->RequestFileName, search_name);
+	}
+
+	if (ses->server->sign)
+		pSMB->hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
+
+	pSMB->hdr.Uid = ses->Suid;
+
+	params = 2 /* level */  + name_len /*includes null */ ;
+	pSMB->TotalDataCount = 0;
+	pSMB->DataCount = 0;
+	pSMB->DataOffset = 0;
+	pSMB->MaxParameterCount = 0;
+	/* BB find exact max SMB PDU from sess structure BB */
+	pSMB->MaxDataCount = cpu_to_le16(4000);
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	pSMB->ParameterOffset = cpu_to_le16(offsetof(
+	  struct smb_com_transaction2_get_dfs_refer_req, MaxReferralLevel) - 4);
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_GET_DFS_REFERRAL);
+	byte_count = params + 3 /* pad */ ;
+	pSMB->ParameterCount = cpu_to_le16(params);
+	pSMB->TotalParameterCount = pSMB->ParameterCount;
+	pSMB->MaxReferralLevel = cpu_to_le16(3);
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+
+	rc = SendReceive(xid, ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc) {
+		cifs_dbg(FYI, "Send error in GetDFSRefer = %d\n", rc);
+		goto GetDFSRefExit;
+	}
+	rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+	/* BB Also check if enough total bytes returned? */
+	if (rc || get_bcc(&pSMBr->hdr) < 17) {
+		rc = -EIO;      /* bad smb */
+		goto GetDFSRefExit;
+	}
+
+	cifs_dbg(FYI, "Decoding GetDFSRefer response BCC: %d  Offset %d\n",
+		 get_bcc(&pSMBr->hdr), le16_to_cpu(pSMBr->t2.DataOffset));
+
+	/* parse returned result into more usable form */
+	rc = parse_dfs_referrals(&pSMBr->dfs_data,
+				 le16_to_cpu(pSMBr->t2.DataCount),
+				 num_of_nodes, target_nodes, nls_codepage,
+				 remap, search_name,
+				 (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) != 0);
+
+GetDFSRefExit:
+	cifs_buf_release(pSMB);
+
+	if (rc == -EAGAIN)
+		goto getDFSRetry;
+
+	return rc;
+}
+
+/* Query File System Info such as free space to old servers such as Win 9x */
+int
+SMBOldQFSInfo(const unsigned int xid, struct cifs_tcon *tcon,
+	      struct kstatfs *FSData)
+{
+/* level 0x01 SMB_QUERY_FILE_SYSTEM_INFO */
+	TRANSACTION2_QFSI_REQ *pSMB = NULL;
+	TRANSACTION2_QFSI_RSP *pSMBr = NULL;
+	FILE_SYSTEM_ALLOC_INFO *response_data;
+	int rc = 0;
+	int bytes_returned = 0;
+	__u16 params, byte_count;
+
+	cifs_dbg(FYI, "OldQFSInfo\n");
+oldQFSInfoRetry:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		(void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	params = 2;     /* level */
+	pSMB->TotalDataCount = 0;
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	pSMB->MaxDataCount = cpu_to_le16(1000);
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	byte_count = params + 1 /* pad */ ;
+	pSMB->TotalParameterCount = cpu_to_le16(params);
+	pSMB->ParameterCount = pSMB->TotalParameterCount;
+	pSMB->ParameterOffset = cpu_to_le16(offsetof(
+	struct smb_com_transaction2_qfsi_req, InformationLevel) - 4);
+	pSMB->DataCount = 0;
+	pSMB->DataOffset = 0;
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION);
+	pSMB->InformationLevel = cpu_to_le16(SMB_INFO_ALLOCATION);
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+		(struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc) {
+		cifs_dbg(FYI, "Send error in QFSInfo = %d\n", rc);
+	} else {                /* decode response */
+		rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+		if (rc || get_bcc(&pSMBr->hdr) < 18)
+			rc = -EIO;      /* bad smb */
+		else {
+			__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+			cifs_dbg(FYI, "qfsinf resp BCC: %d  Offset %d\n",
+				 get_bcc(&pSMBr->hdr), data_offset);
+
+			response_data = (FILE_SYSTEM_ALLOC_INFO *)
+				(((char *) &pSMBr->hdr.Protocol) + data_offset);
+			FSData->f_bsize =
+				le16_to_cpu(response_data->BytesPerSector) *
+				le32_to_cpu(response_data->
+					SectorsPerAllocationUnit);
+			/*
+			 * much prefer larger but if server doesn't report
+			 * a valid size than 4K is a reasonable minimum
+			 */
+			if (FSData->f_bsize < 512)
+				FSData->f_bsize = 4096;
+
+			FSData->f_blocks =
+			       le32_to_cpu(response_data->TotalAllocationUnits);
+			FSData->f_bfree = FSData->f_bavail =
+				le32_to_cpu(response_data->FreeAllocationUnits);
+			cifs_dbg(FYI, "Blocks: %lld  Free: %lld Block size %ld\n",
+				 (unsigned long long)FSData->f_blocks,
+				 (unsigned long long)FSData->f_bfree,
+				 FSData->f_bsize);
+		}
+	}
+	cifs_buf_release(pSMB);
+
+	if (rc == -EAGAIN)
+		goto oldQFSInfoRetry;
+
+	return rc;
+}
+
+int
+CIFSSMBQFSInfo(const unsigned int xid, struct cifs_tcon *tcon,
+	       struct kstatfs *FSData)
+{
+/* level 0x103 SMB_QUERY_FILE_SYSTEM_INFO */
+	TRANSACTION2_QFSI_REQ *pSMB = NULL;
+	TRANSACTION2_QFSI_RSP *pSMBr = NULL;
+	FILE_SYSTEM_INFO *response_data;
+	int rc = 0;
+	int bytes_returned = 0;
+	__u16 params, byte_count;
+
+	cifs_dbg(FYI, "In QFSInfo\n");
+QFSInfoRetry:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	params = 2;	/* level */
+	pSMB->TotalDataCount = 0;
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	pSMB->MaxDataCount = cpu_to_le16(1000);
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	byte_count = params + 1 /* pad */ ;
+	pSMB->TotalParameterCount = cpu_to_le16(params);
+	pSMB->ParameterCount = pSMB->TotalParameterCount;
+	pSMB->ParameterOffset = cpu_to_le16(offsetof(
+		struct smb_com_transaction2_qfsi_req, InformationLevel) - 4);
+	pSMB->DataCount = 0;
+	pSMB->DataOffset = 0;
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION);
+	pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FS_SIZE_INFO);
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc) {
+		cifs_dbg(FYI, "Send error in QFSInfo = %d\n", rc);
+	} else {		/* decode response */
+		rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+		if (rc || get_bcc(&pSMBr->hdr) < 24)
+			rc = -EIO;	/* bad smb */
+		else {
+			__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+
+			response_data =
+			    (FILE_SYSTEM_INFO
+			     *) (((char *) &pSMBr->hdr.Protocol) +
+				 data_offset);
+			FSData->f_bsize =
+			    le32_to_cpu(response_data->BytesPerSector) *
+			    le32_to_cpu(response_data->
+					SectorsPerAllocationUnit);
+			/*
+			 * much prefer larger but if server doesn't report
+			 * a valid size than 4K is a reasonable minimum
+			 */
+			if (FSData->f_bsize < 512)
+				FSData->f_bsize = 4096;
+
+			FSData->f_blocks =
+			    le64_to_cpu(response_data->TotalAllocationUnits);
+			FSData->f_bfree = FSData->f_bavail =
+			    le64_to_cpu(response_data->FreeAllocationUnits);
+			cifs_dbg(FYI, "Blocks: %lld  Free: %lld Block size %ld\n",
+				 (unsigned long long)FSData->f_blocks,
+				 (unsigned long long)FSData->f_bfree,
+				 FSData->f_bsize);
+		}
+	}
+	cifs_buf_release(pSMB);
+
+	if (rc == -EAGAIN)
+		goto QFSInfoRetry;
+
+	return rc;
+}
+
+int
+CIFSSMBQFSAttributeInfo(const unsigned int xid, struct cifs_tcon *tcon)
+{
+/* level 0x105  SMB_QUERY_FILE_SYSTEM_INFO */
+	TRANSACTION2_QFSI_REQ *pSMB = NULL;
+	TRANSACTION2_QFSI_RSP *pSMBr = NULL;
+	FILE_SYSTEM_ATTRIBUTE_INFO *response_data;
+	int rc = 0;
+	int bytes_returned = 0;
+	__u16 params, byte_count;
+
+	cifs_dbg(FYI, "In QFSAttributeInfo\n");
+QFSAttributeRetry:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	params = 2;	/* level */
+	pSMB->TotalDataCount = 0;
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	/* BB find exact max SMB PDU from sess structure BB */
+	pSMB->MaxDataCount = cpu_to_le16(1000);
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	byte_count = params + 1 /* pad */ ;
+	pSMB->TotalParameterCount = cpu_to_le16(params);
+	pSMB->ParameterCount = pSMB->TotalParameterCount;
+	pSMB->ParameterOffset = cpu_to_le16(offsetof(
+		struct smb_com_transaction2_qfsi_req, InformationLevel) - 4);
+	pSMB->DataCount = 0;
+	pSMB->DataOffset = 0;
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION);
+	pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FS_ATTRIBUTE_INFO);
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc) {
+		cifs_dbg(VFS, "Send error in QFSAttributeInfo = %d\n", rc);
+	} else {		/* decode response */
+		rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+		if (rc || get_bcc(&pSMBr->hdr) < 13) {
+			/* BB also check if enough bytes returned */
+			rc = -EIO;	/* bad smb */
+		} else {
+			__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+			response_data =
+			    (FILE_SYSTEM_ATTRIBUTE_INFO
+			     *) (((char *) &pSMBr->hdr.Protocol) +
+				 data_offset);
+			memcpy(&tcon->fsAttrInfo, response_data,
+			       sizeof(FILE_SYSTEM_ATTRIBUTE_INFO));
+		}
+	}
+	cifs_buf_release(pSMB);
+
+	if (rc == -EAGAIN)
+		goto QFSAttributeRetry;
+
+	return rc;
+}
+
+int
+CIFSSMBQFSDeviceInfo(const unsigned int xid, struct cifs_tcon *tcon)
+{
+/* level 0x104 SMB_QUERY_FILE_SYSTEM_INFO */
+	TRANSACTION2_QFSI_REQ *pSMB = NULL;
+	TRANSACTION2_QFSI_RSP *pSMBr = NULL;
+	FILE_SYSTEM_DEVICE_INFO *response_data;
+	int rc = 0;
+	int bytes_returned = 0;
+	__u16 params, byte_count;
+
+	cifs_dbg(FYI, "In QFSDeviceInfo\n");
+QFSDeviceRetry:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	params = 2;	/* level */
+	pSMB->TotalDataCount = 0;
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	/* BB find exact max SMB PDU from sess structure BB */
+	pSMB->MaxDataCount = cpu_to_le16(1000);
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	byte_count = params + 1 /* pad */ ;
+	pSMB->TotalParameterCount = cpu_to_le16(params);
+	pSMB->ParameterCount = pSMB->TotalParameterCount;
+	pSMB->ParameterOffset = cpu_to_le16(offsetof(
+		struct smb_com_transaction2_qfsi_req, InformationLevel) - 4);
+
+	pSMB->DataCount = 0;
+	pSMB->DataOffset = 0;
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION);
+	pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FS_DEVICE_INFO);
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc) {
+		cifs_dbg(FYI, "Send error in QFSDeviceInfo = %d\n", rc);
+	} else {		/* decode response */
+		rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+		if (rc || get_bcc(&pSMBr->hdr) <
+			  sizeof(FILE_SYSTEM_DEVICE_INFO))
+			rc = -EIO;	/* bad smb */
+		else {
+			__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+			response_data =
+			    (FILE_SYSTEM_DEVICE_INFO *)
+				(((char *) &pSMBr->hdr.Protocol) +
+				 data_offset);
+			memcpy(&tcon->fsDevInfo, response_data,
+			       sizeof(FILE_SYSTEM_DEVICE_INFO));
+		}
+	}
+	cifs_buf_release(pSMB);
+
+	if (rc == -EAGAIN)
+		goto QFSDeviceRetry;
+
+	return rc;
+}
+
+int
+CIFSSMBQFSUnixInfo(const unsigned int xid, struct cifs_tcon *tcon)
+{
+/* level 0x200  SMB_QUERY_CIFS_UNIX_INFO */
+	TRANSACTION2_QFSI_REQ *pSMB = NULL;
+	TRANSACTION2_QFSI_RSP *pSMBr = NULL;
+	FILE_SYSTEM_UNIX_INFO *response_data;
+	int rc = 0;
+	int bytes_returned = 0;
+	__u16 params, byte_count;
+
+	cifs_dbg(FYI, "In QFSUnixInfo\n");
+QFSUnixRetry:
+	rc = smb_init_no_reconnect(SMB_COM_TRANSACTION2, 15, tcon,
+				   (void **) &pSMB, (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	params = 2;	/* level */
+	pSMB->TotalDataCount = 0;
+	pSMB->DataCount = 0;
+	pSMB->DataOffset = 0;
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	/* BB find exact max SMB PDU from sess structure BB */
+	pSMB->MaxDataCount = cpu_to_le16(100);
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	byte_count = params + 1 /* pad */ ;
+	pSMB->ParameterCount = cpu_to_le16(params);
+	pSMB->TotalParameterCount = pSMB->ParameterCount;
+	pSMB->ParameterOffset = cpu_to_le16(offsetof(struct
+			smb_com_transaction2_qfsi_req, InformationLevel) - 4);
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION);
+	pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_CIFS_UNIX_INFO);
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc) {
+		cifs_dbg(VFS, "Send error in QFSUnixInfo = %d\n", rc);
+	} else {		/* decode response */
+		rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+		if (rc || get_bcc(&pSMBr->hdr) < 13) {
+			rc = -EIO;	/* bad smb */
+		} else {
+			__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+			response_data =
+			    (FILE_SYSTEM_UNIX_INFO
+			     *) (((char *) &pSMBr->hdr.Protocol) +
+				 data_offset);
+			memcpy(&tcon->fsUnixInfo, response_data,
+			       sizeof(FILE_SYSTEM_UNIX_INFO));
+		}
+	}
+	cifs_buf_release(pSMB);
+
+	if (rc == -EAGAIN)
+		goto QFSUnixRetry;
+
+
+	return rc;
+}
+
+int
+CIFSSMBSetFSUnixInfo(const unsigned int xid, struct cifs_tcon *tcon, __u64 cap)
+{
+/* level 0x200  SMB_SET_CIFS_UNIX_INFO */
+	TRANSACTION2_SETFSI_REQ *pSMB = NULL;
+	TRANSACTION2_SETFSI_RSP *pSMBr = NULL;
+	int rc = 0;
+	int bytes_returned = 0;
+	__u16 params, param_offset, offset, byte_count;
+
+	cifs_dbg(FYI, "In SETFSUnixInfo\n");
+SETFSUnixRetry:
+	/* BB switch to small buf init to save memory */
+	rc = smb_init_no_reconnect(SMB_COM_TRANSACTION2, 15, tcon,
+					(void **) &pSMB, (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	params = 4;	/* 2 bytes zero followed by info level. */
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	param_offset = offsetof(struct smb_com_transaction2_setfsi_req, FileNum)
+				- 4;
+	offset = param_offset + params;
+
+	pSMB->MaxParameterCount = cpu_to_le16(4);
+	/* BB find exact max SMB PDU from sess structure BB */
+	pSMB->MaxDataCount = cpu_to_le16(100);
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FS_INFORMATION);
+	byte_count = 1 /* pad */ + params + 12;
+
+	pSMB->DataCount = cpu_to_le16(12);
+	pSMB->ParameterCount = cpu_to_le16(params);
+	pSMB->TotalDataCount = pSMB->DataCount;
+	pSMB->TotalParameterCount = pSMB->ParameterCount;
+	pSMB->ParameterOffset = cpu_to_le16(param_offset);
+	pSMB->DataOffset = cpu_to_le16(offset);
+
+	/* Params. */
+	pSMB->FileNum = 0;
+	pSMB->InformationLevel = cpu_to_le16(SMB_SET_CIFS_UNIX_INFO);
+
+	/* Data. */
+	pSMB->ClientUnixMajor = cpu_to_le16(CIFS_UNIX_MAJOR_VERSION);
+	pSMB->ClientUnixMinor = cpu_to_le16(CIFS_UNIX_MINOR_VERSION);
+	pSMB->ClientUnixCap = cpu_to_le64(cap);
+
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc) {
+		cifs_dbg(VFS, "Send error in SETFSUnixInfo = %d\n", rc);
+	} else {		/* decode response */
+		rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+		if (rc)
+			rc = -EIO;	/* bad smb */
+	}
+	cifs_buf_release(pSMB);
+
+	if (rc == -EAGAIN)
+		goto SETFSUnixRetry;
+
+	return rc;
+}
+
+
+
+int
+CIFSSMBQFSPosixInfo(const unsigned int xid, struct cifs_tcon *tcon,
+		   struct kstatfs *FSData)
+{
+/* level 0x201  SMB_QUERY_CIFS_POSIX_INFO */
+	TRANSACTION2_QFSI_REQ *pSMB = NULL;
+	TRANSACTION2_QFSI_RSP *pSMBr = NULL;
+	FILE_SYSTEM_POSIX_INFO *response_data;
+	int rc = 0;
+	int bytes_returned = 0;
+	__u16 params, byte_count;
+
+	cifs_dbg(FYI, "In QFSPosixInfo\n");
+QFSPosixRetry:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	params = 2;	/* level */
+	pSMB->TotalDataCount = 0;
+	pSMB->DataCount = 0;
+	pSMB->DataOffset = 0;
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	/* BB find exact max SMB PDU from sess structure BB */
+	pSMB->MaxDataCount = cpu_to_le16(100);
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	byte_count = params + 1 /* pad */ ;
+	pSMB->ParameterCount = cpu_to_le16(params);
+	pSMB->TotalParameterCount = pSMB->ParameterCount;
+	pSMB->ParameterOffset = cpu_to_le16(offsetof(struct
+			smb_com_transaction2_qfsi_req, InformationLevel) - 4);
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION);
+	pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_POSIX_FS_INFO);
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc) {
+		cifs_dbg(FYI, "Send error in QFSUnixInfo = %d\n", rc);
+	} else {		/* decode response */
+		rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+		if (rc || get_bcc(&pSMBr->hdr) < 13) {
+			rc = -EIO;	/* bad smb */
+		} else {
+			__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+			response_data =
+			    (FILE_SYSTEM_POSIX_INFO
+			     *) (((char *) &pSMBr->hdr.Protocol) +
+				 data_offset);
+			FSData->f_bsize =
+					le32_to_cpu(response_data->BlockSize);
+			/*
+			 * much prefer larger but if server doesn't report
+			 * a valid size than 4K is a reasonable minimum
+			 */
+			if (FSData->f_bsize < 512)
+				FSData->f_bsize = 4096;
+
+			FSData->f_blocks =
+					le64_to_cpu(response_data->TotalBlocks);
+			FSData->f_bfree =
+			    le64_to_cpu(response_data->BlocksAvail);
+			if (response_data->UserBlocksAvail == cpu_to_le64(-1)) {
+				FSData->f_bavail = FSData->f_bfree;
+			} else {
+				FSData->f_bavail =
+				    le64_to_cpu(response_data->UserBlocksAvail);
+			}
+			if (response_data->TotalFileNodes != cpu_to_le64(-1))
+				FSData->f_files =
+				     le64_to_cpu(response_data->TotalFileNodes);
+			if (response_data->FreeFileNodes != cpu_to_le64(-1))
+				FSData->f_ffree =
+				      le64_to_cpu(response_data->FreeFileNodes);
+		}
+	}
+	cifs_buf_release(pSMB);
+
+	if (rc == -EAGAIN)
+		goto QFSPosixRetry;
+
+	return rc;
+}
+
+
+/*
+ * We can not use write of zero bytes trick to set file size due to need for
+ * large file support. Also note that this SetPathInfo is preferred to
+ * SetFileInfo based method in next routine which is only needed to work around
+ * a sharing violation bugin Samba which this routine can run into.
+ */
+int
+CIFSSMBSetEOF(const unsigned int xid, struct cifs_tcon *tcon,
+	      const char *file_name, __u64 size, struct cifs_sb_info *cifs_sb,
+	      bool set_allocation)
+{
+	struct smb_com_transaction2_spi_req *pSMB = NULL;
+	struct smb_com_transaction2_spi_rsp *pSMBr = NULL;
+	struct file_end_of_file_info *parm_data;
+	int name_len;
+	int rc = 0;
+	int bytes_returned = 0;
+	int remap = cifs_remap(cifs_sb);
+
+	__u16 params, byte_count, data_count, param_offset, offset;
+
+	cifs_dbg(FYI, "In SetEOF\n");
+SetEOFRetry:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len =
+		    cifsConvertToUTF16((__le16 *) pSMB->FileName, file_name,
+				       PATH_MAX, cifs_sb->local_nls, remap);
+		name_len++;	/* trailing null */
+		name_len *= 2;
+	} else {
+		name_len = copy_path_name(pSMB->FileName, file_name);
+	}
+	params = 6 + name_len;
+	data_count = sizeof(struct file_end_of_file_info);
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	pSMB->MaxDataCount = cpu_to_le16(4100);
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	param_offset = offsetof(struct smb_com_transaction2_spi_req,
+				InformationLevel) - 4;
+	offset = param_offset + params;
+	if (set_allocation) {
+		if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)
+			pSMB->InformationLevel =
+				cpu_to_le16(SMB_SET_FILE_ALLOCATION_INFO2);
+		else
+			pSMB->InformationLevel =
+				cpu_to_le16(SMB_SET_FILE_ALLOCATION_INFO);
+	} else /* Set File Size */  {
+	    if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)
+		    pSMB->InformationLevel =
+				cpu_to_le16(SMB_SET_FILE_END_OF_FILE_INFO2);
+	    else
+		    pSMB->InformationLevel =
+				cpu_to_le16(SMB_SET_FILE_END_OF_FILE_INFO);
+	}
+
+	parm_data =
+	    (struct file_end_of_file_info *) (((char *) &pSMB->hdr.Protocol) +
+				       offset);
+	pSMB->ParameterOffset = cpu_to_le16(param_offset);
+	pSMB->DataOffset = cpu_to_le16(offset);
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
+	byte_count = 3 /* pad */  + params + data_count;
+	pSMB->DataCount = cpu_to_le16(data_count);
+	pSMB->TotalDataCount = pSMB->DataCount;
+	pSMB->ParameterCount = cpu_to_le16(params);
+	pSMB->TotalParameterCount = pSMB->ParameterCount;
+	pSMB->Reserved4 = 0;
+	inc_rfc1001_len(pSMB, byte_count);
+	parm_data->FileSize = cpu_to_le64(size);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc)
+		cifs_dbg(FYI, "SetPathInfo (file size) returned %d\n", rc);
+
+	cifs_buf_release(pSMB);
+
+	if (rc == -EAGAIN)
+		goto SetEOFRetry;
+
+	return rc;
+}
+
+int
+CIFSSMBSetFileSize(const unsigned int xid, struct cifs_tcon *tcon,
+		   struct cifsFileInfo *cfile, __u64 size, bool set_allocation)
+{
+	struct smb_com_transaction2_sfi_req *pSMB  = NULL;
+	struct file_end_of_file_info *parm_data;
+	int rc = 0;
+	__u16 params, param_offset, offset, byte_count, count;
+
+	cifs_dbg(FYI, "SetFileSize (via SetFileInfo) %lld\n",
+		 (long long)size);
+	rc = small_smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB);
+
+	if (rc)
+		return rc;
+
+	pSMB->hdr.Pid = cpu_to_le16((__u16)cfile->pid);
+	pSMB->hdr.PidHigh = cpu_to_le16((__u16)(cfile->pid >> 16));
+
+	params = 6;
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
+	offset = param_offset + params;
+
+	count = sizeof(struct file_end_of_file_info);
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	/* BB find exact max SMB PDU from sess structure BB */
+	pSMB->MaxDataCount = cpu_to_le16(1000);
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION);
+	byte_count = 3 /* pad */  + params + count;
+	pSMB->DataCount = cpu_to_le16(count);
+	pSMB->ParameterCount = cpu_to_le16(params);
+	pSMB->TotalDataCount = pSMB->DataCount;
+	pSMB->TotalParameterCount = pSMB->ParameterCount;
+	pSMB->ParameterOffset = cpu_to_le16(param_offset);
+	/* SMB offsets are from the beginning of SMB which is 4 bytes in, after RFC1001 field */
+	parm_data =
+		(struct file_end_of_file_info *)(((char *)pSMB) + offset + 4);
+	pSMB->DataOffset = cpu_to_le16(offset);
+	parm_data->FileSize = cpu_to_le64(size);
+	pSMB->Fid = cfile->fid.netfid;
+	if (set_allocation) {
+		if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)
+			pSMB->InformationLevel =
+				cpu_to_le16(SMB_SET_FILE_ALLOCATION_INFO2);
+		else
+			pSMB->InformationLevel =
+				cpu_to_le16(SMB_SET_FILE_ALLOCATION_INFO);
+	} else /* Set File Size */  {
+	    if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)
+		    pSMB->InformationLevel =
+				cpu_to_le16(SMB_SET_FILE_END_OF_FILE_INFO2);
+	    else
+		    pSMB->InformationLevel =
+				cpu_to_le16(SMB_SET_FILE_END_OF_FILE_INFO);
+	}
+	pSMB->Reserved4 = 0;
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+	rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0);
+	cifs_small_buf_release(pSMB);
+	if (rc) {
+		cifs_dbg(FYI, "Send error in SetFileInfo (SetFileSize) = %d\n",
+			 rc);
+	}
+
+	/* Note: On -EAGAIN error only caller can retry on handle based calls
+		since file handle passed in no longer valid */
+
+	return rc;
+}
+
+/* Some legacy servers such as NT4 require that the file times be set on
+   an open handle, rather than by pathname - this is awkward due to
+   potential access conflicts on the open, but it is unavoidable for these
+   old servers since the only other choice is to go from 100 nanosecond DCE
+   time and resort to the original setpathinfo level which takes the ancient
+   DOS time format with 2 second granularity */
+int
+CIFSSMBSetFileInfo(const unsigned int xid, struct cifs_tcon *tcon,
+		    const FILE_BASIC_INFO *data, __u16 fid, __u32 pid_of_opener)
+{
+	struct smb_com_transaction2_sfi_req *pSMB  = NULL;
+	char *data_offset;
+	int rc = 0;
+	__u16 params, param_offset, offset, byte_count, count;
+
+	cifs_dbg(FYI, "Set Times (via SetFileInfo)\n");
+	rc = small_smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB);
+
+	if (rc)
+		return rc;
+
+	pSMB->hdr.Pid = cpu_to_le16((__u16)pid_of_opener);
+	pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid_of_opener >> 16));
+
+	params = 6;
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
+	offset = param_offset + params;
+
+	data_offset = (char *)pSMB +
+			offsetof(struct smb_hdr, Protocol) + offset;
+
+	count = sizeof(FILE_BASIC_INFO);
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	/* BB find max SMB PDU from sess */
+	pSMB->MaxDataCount = cpu_to_le16(1000);
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION);
+	byte_count = 3 /* pad */  + params + count;
+	pSMB->DataCount = cpu_to_le16(count);
+	pSMB->ParameterCount = cpu_to_le16(params);
+	pSMB->TotalDataCount = pSMB->DataCount;
+	pSMB->TotalParameterCount = pSMB->ParameterCount;
+	pSMB->ParameterOffset = cpu_to_le16(param_offset);
+	pSMB->DataOffset = cpu_to_le16(offset);
+	pSMB->Fid = fid;
+	if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)
+		pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_BASIC_INFO2);
+	else
+		pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_BASIC_INFO);
+	pSMB->Reserved4 = 0;
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+	memcpy(data_offset, data, sizeof(FILE_BASIC_INFO));
+	rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0);
+	cifs_small_buf_release(pSMB);
+	if (rc)
+		cifs_dbg(FYI, "Send error in Set Time (SetFileInfo) = %d\n",
+			 rc);
+
+	/* Note: On -EAGAIN error only caller can retry on handle based calls
+		since file handle passed in no longer valid */
+
+	return rc;
+}
+
+int
+CIFSSMBSetFileDisposition(const unsigned int xid, struct cifs_tcon *tcon,
+			  bool delete_file, __u16 fid, __u32 pid_of_opener)
+{
+	struct smb_com_transaction2_sfi_req *pSMB  = NULL;
+	char *data_offset;
+	int rc = 0;
+	__u16 params, param_offset, offset, byte_count, count;
+
+	cifs_dbg(FYI, "Set File Disposition (via SetFileInfo)\n");
+	rc = small_smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB);
+
+	if (rc)
+		return rc;
+
+	pSMB->hdr.Pid = cpu_to_le16((__u16)pid_of_opener);
+	pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid_of_opener >> 16));
+
+	params = 6;
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
+	offset = param_offset + params;
+
+	/* SMB offsets are from the beginning of SMB which is 4 bytes in, after RFC1001 field */
+	data_offset = (char *)(pSMB) + offset + 4;
+
+	count = 1;
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	/* BB find max SMB PDU from sess */
+	pSMB->MaxDataCount = cpu_to_le16(1000);
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION);
+	byte_count = 3 /* pad */  + params + count;
+	pSMB->DataCount = cpu_to_le16(count);
+	pSMB->ParameterCount = cpu_to_le16(params);
+	pSMB->TotalDataCount = pSMB->DataCount;
+	pSMB->TotalParameterCount = pSMB->ParameterCount;
+	pSMB->ParameterOffset = cpu_to_le16(param_offset);
+	pSMB->DataOffset = cpu_to_le16(offset);
+	pSMB->Fid = fid;
+	pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_DISPOSITION_INFO);
+	pSMB->Reserved4 = 0;
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+	*data_offset = delete_file ? 1 : 0;
+	rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0);
+	cifs_small_buf_release(pSMB);
+	if (rc)
+		cifs_dbg(FYI, "Send error in SetFileDisposition = %d\n", rc);
+
+	return rc;
+}
+
+static int
+CIFSSMBSetPathInfoFB(const unsigned int xid, struct cifs_tcon *tcon,
+		     const char *fileName, const FILE_BASIC_INFO *data,
+		     const struct nls_table *nls_codepage,
+		     struct cifs_sb_info *cifs_sb)
+{
+	int oplock = 0;
+	struct cifs_open_parms oparms;
+	struct cifs_fid fid;
+	int rc;
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.cifs_sb = cifs_sb,
+		.desired_access = GENERIC_WRITE,
+		.create_options = cifs_create_options(cifs_sb, 0),
+		.disposition = FILE_OPEN,
+		.path = fileName,
+		.fid = &fid,
+	};
+
+	rc = CIFS_open(xid, &oparms, &oplock, NULL);
+	if (rc)
+		goto out;
+
+	rc = CIFSSMBSetFileInfo(xid, tcon, data, fid.netfid, current->tgid);
+	CIFSSMBClose(xid, tcon, fid.netfid);
+out:
+
+	return rc;
+}
+
+int
+CIFSSMBSetPathInfo(const unsigned int xid, struct cifs_tcon *tcon,
+		   const char *fileName, const FILE_BASIC_INFO *data,
+		   const struct nls_table *nls_codepage,
+		     struct cifs_sb_info *cifs_sb)
+{
+	TRANSACTION2_SPI_REQ *pSMB = NULL;
+	TRANSACTION2_SPI_RSP *pSMBr = NULL;
+	int name_len;
+	int rc = 0;
+	int bytes_returned = 0;
+	char *data_offset;
+	__u16 params, param_offset, offset, byte_count, count;
+	int remap = cifs_remap(cifs_sb);
+
+	cifs_dbg(FYI, "In SetTimes\n");
+
+SetTimesRetry:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len =
+		    cifsConvertToUTF16((__le16 *) pSMB->FileName, fileName,
+				       PATH_MAX, nls_codepage, remap);
+		name_len++;	/* trailing null */
+		name_len *= 2;
+	} else {
+		name_len = copy_path_name(pSMB->FileName, fileName);
+	}
+
+	params = 6 + name_len;
+	count = sizeof(FILE_BASIC_INFO);
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	/* BB find max SMB PDU from sess structure BB */
+	pSMB->MaxDataCount = cpu_to_le16(1000);
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	param_offset = offsetof(struct smb_com_transaction2_spi_req,
+				InformationLevel) - 4;
+	offset = param_offset + params;
+	data_offset = (char *) (&pSMB->hdr.Protocol) + offset;
+	pSMB->ParameterOffset = cpu_to_le16(param_offset);
+	pSMB->DataOffset = cpu_to_le16(offset);
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
+	byte_count = 3 /* pad */  + params + count;
+
+	pSMB->DataCount = cpu_to_le16(count);
+	pSMB->ParameterCount = cpu_to_le16(params);
+	pSMB->TotalDataCount = pSMB->DataCount;
+	pSMB->TotalParameterCount = pSMB->ParameterCount;
+	if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)
+		pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_BASIC_INFO2);
+	else
+		pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_BASIC_INFO);
+	pSMB->Reserved4 = 0;
+	inc_rfc1001_len(pSMB, byte_count);
+	memcpy(data_offset, data, sizeof(FILE_BASIC_INFO));
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc)
+		cifs_dbg(FYI, "SetPathInfo (times) returned %d\n", rc);
+
+	cifs_buf_release(pSMB);
+
+	if (rc == -EAGAIN)
+		goto SetTimesRetry;
+
+	if (rc == -EOPNOTSUPP)
+		return CIFSSMBSetPathInfoFB(xid, tcon, fileName, data,
+					    nls_codepage, cifs_sb);
+
+	return rc;
+}
+
+static void
+cifs_fill_unix_set_info(FILE_UNIX_BASIC_INFO *data_offset,
+			const struct cifs_unix_set_info_args *args)
+{
+	u64 uid = NO_CHANGE_64, gid = NO_CHANGE_64;
+	u64 mode = args->mode;
+
+	if (uid_valid(args->uid))
+		uid = from_kuid(&init_user_ns, args->uid);
+	if (gid_valid(args->gid))
+		gid = from_kgid(&init_user_ns, args->gid);
+
+	/*
+	 * Samba server ignores set of file size to zero due to bugs in some
+	 * older clients, but we should be precise - we use SetFileSize to
+	 * set file size and do not want to truncate file size to zero
+	 * accidentally as happened on one Samba server beta by putting
+	 * zero instead of -1 here
+	 */
+	data_offset->EndOfFile = cpu_to_le64(NO_CHANGE_64);
+	data_offset->NumOfBytes = cpu_to_le64(NO_CHANGE_64);
+	data_offset->LastStatusChange = cpu_to_le64(args->ctime);
+	data_offset->LastAccessTime = cpu_to_le64(args->atime);
+	data_offset->LastModificationTime = cpu_to_le64(args->mtime);
+	data_offset->Uid = cpu_to_le64(uid);
+	data_offset->Gid = cpu_to_le64(gid);
+	/* better to leave device as zero when it is  */
+	data_offset->DevMajor = cpu_to_le64(MAJOR(args->device));
+	data_offset->DevMinor = cpu_to_le64(MINOR(args->device));
+	data_offset->Permissions = cpu_to_le64(mode);
+
+	if (S_ISREG(mode))
+		data_offset->Type = cpu_to_le32(UNIX_FILE);
+	else if (S_ISDIR(mode))
+		data_offset->Type = cpu_to_le32(UNIX_DIR);
+	else if (S_ISLNK(mode))
+		data_offset->Type = cpu_to_le32(UNIX_SYMLINK);
+	else if (S_ISCHR(mode))
+		data_offset->Type = cpu_to_le32(UNIX_CHARDEV);
+	else if (S_ISBLK(mode))
+		data_offset->Type = cpu_to_le32(UNIX_BLOCKDEV);
+	else if (S_ISFIFO(mode))
+		data_offset->Type = cpu_to_le32(UNIX_FIFO);
+	else if (S_ISSOCK(mode))
+		data_offset->Type = cpu_to_le32(UNIX_SOCKET);
+}
+
+int
+CIFSSMBUnixSetFileInfo(const unsigned int xid, struct cifs_tcon *tcon,
+		       const struct cifs_unix_set_info_args *args,
+		       u16 fid, u32 pid_of_opener)
+{
+	struct smb_com_transaction2_sfi_req *pSMB  = NULL;
+	char *data_offset;
+	int rc = 0;
+	u16 params, param_offset, offset, byte_count, count;
+
+	cifs_dbg(FYI, "Set Unix Info (via SetFileInfo)\n");
+	rc = small_smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB);
+
+	if (rc)
+		return rc;
+
+	pSMB->hdr.Pid = cpu_to_le16((__u16)pid_of_opener);
+	pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid_of_opener >> 16));
+
+	params = 6;
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
+	offset = param_offset + params;
+
+	data_offset = (char *)pSMB +
+			offsetof(struct smb_hdr, Protocol) + offset;
+
+	count = sizeof(FILE_UNIX_BASIC_INFO);
+
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	/* BB find max SMB PDU from sess */
+	pSMB->MaxDataCount = cpu_to_le16(1000);
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION);
+	byte_count = 3 /* pad */  + params + count;
+	pSMB->DataCount = cpu_to_le16(count);
+	pSMB->ParameterCount = cpu_to_le16(params);
+	pSMB->TotalDataCount = pSMB->DataCount;
+	pSMB->TotalParameterCount = pSMB->ParameterCount;
+	pSMB->ParameterOffset = cpu_to_le16(param_offset);
+	pSMB->DataOffset = cpu_to_le16(offset);
+	pSMB->Fid = fid;
+	pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_UNIX_BASIC);
+	pSMB->Reserved4 = 0;
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+
+	cifs_fill_unix_set_info((FILE_UNIX_BASIC_INFO *)data_offset, args);
+
+	rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0);
+	cifs_small_buf_release(pSMB);
+	if (rc)
+		cifs_dbg(FYI, "Send error in Set Time (SetFileInfo) = %d\n",
+			 rc);
+
+	/* Note: On -EAGAIN error only caller can retry on handle based calls
+		since file handle passed in no longer valid */
+
+	return rc;
+}
+
+int
+CIFSSMBUnixSetPathInfo(const unsigned int xid, struct cifs_tcon *tcon,
+		       const char *file_name,
+		       const struct cifs_unix_set_info_args *args,
+		       const struct nls_table *nls_codepage, int remap)
+{
+	TRANSACTION2_SPI_REQ *pSMB = NULL;
+	TRANSACTION2_SPI_RSP *pSMBr = NULL;
+	int name_len;
+	int rc = 0;
+	int bytes_returned = 0;
+	FILE_UNIX_BASIC_INFO *data_offset;
+	__u16 params, param_offset, offset, count, byte_count;
+
+	cifs_dbg(FYI, "In SetUID/GID/Mode\n");
+setPermsRetry:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len =
+		    cifsConvertToUTF16((__le16 *) pSMB->FileName, file_name,
+				       PATH_MAX, nls_codepage, remap);
+		name_len++;	/* trailing null */
+		name_len *= 2;
+	} else {
+		name_len = copy_path_name(pSMB->FileName, file_name);
+	}
+
+	params = 6 + name_len;
+	count = sizeof(FILE_UNIX_BASIC_INFO);
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	/* BB find max SMB PDU from sess structure BB */
+	pSMB->MaxDataCount = cpu_to_le16(1000);
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	param_offset = offsetof(struct smb_com_transaction2_spi_req,
+				InformationLevel) - 4;
+	offset = param_offset + params;
+	/* SMB offsets are from the beginning of SMB which is 4 bytes in, after RFC1001 field */
+	data_offset = (FILE_UNIX_BASIC_INFO *)((char *) pSMB + offset + 4);
+	memset(data_offset, 0, count);
+	pSMB->DataOffset = cpu_to_le16(offset);
+	pSMB->ParameterOffset = cpu_to_le16(param_offset);
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
+	byte_count = 3 /* pad */  + params + count;
+	pSMB->ParameterCount = cpu_to_le16(params);
+	pSMB->DataCount = cpu_to_le16(count);
+	pSMB->TotalParameterCount = pSMB->ParameterCount;
+	pSMB->TotalDataCount = pSMB->DataCount;
+	pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_UNIX_BASIC);
+	pSMB->Reserved4 = 0;
+	inc_rfc1001_len(pSMB, byte_count);
+
+	cifs_fill_unix_set_info(data_offset, args);
+
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc)
+		cifs_dbg(FYI, "SetPathInfo (perms) returned %d\n", rc);
+
+	cifs_buf_release(pSMB);
+	if (rc == -EAGAIN)
+		goto setPermsRetry;
+	return rc;
+}
+
+#ifdef CONFIG_CIFS_XATTR
+/*
+ * Do a path-based QUERY_ALL_EAS call and parse the result. This is a common
+ * function used by listxattr and getxattr type calls. When ea_name is set,
+ * it looks for that attribute name and stuffs that value into the EAData
+ * buffer. When ea_name is NULL, it stuffs a list of attribute names into the
+ * buffer. In both cases, the return value is either the length of the
+ * resulting data or a negative error code. If EAData is a NULL pointer then
+ * the data isn't copied to it, but the length is returned.
+ */
+ssize_t
+CIFSSMBQAllEAs(const unsigned int xid, struct cifs_tcon *tcon,
+		const unsigned char *searchName, const unsigned char *ea_name,
+		char *EAData, size_t buf_size,
+		struct cifs_sb_info *cifs_sb)
+{
+		/* BB assumes one setup word */
+	TRANSACTION2_QPI_REQ *pSMB = NULL;
+	TRANSACTION2_QPI_RSP *pSMBr = NULL;
+	int remap = cifs_remap(cifs_sb);
+	struct nls_table *nls_codepage = cifs_sb->local_nls;
+	int rc = 0;
+	int bytes_returned;
+	int list_len;
+	struct fealist *ea_response_data;
+	struct fea *temp_fea;
+	char *temp_ptr;
+	char *end_of_smb;
+	__u16 params, byte_count, data_offset;
+	unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
+
+	cifs_dbg(FYI, "In Query All EAs path %s\n", searchName);
+QAllEAsRetry:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		list_len =
+		    cifsConvertToUTF16((__le16 *) pSMB->FileName, searchName,
+				       PATH_MAX, nls_codepage, remap);
+		list_len++;	/* trailing null */
+		list_len *= 2;
+	} else {
+		list_len = copy_path_name(pSMB->FileName, searchName);
+	}
+
+	params = 2 /* level */ + 4 /* reserved */ + list_len /* includes NUL */;
+	pSMB->TotalDataCount = 0;
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	/* BB find exact max SMB PDU from sess structure BB */
+	pSMB->MaxDataCount = cpu_to_le16(CIFSMaxBufSize);
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	pSMB->ParameterOffset = cpu_to_le16(offsetof(
+	struct smb_com_transaction2_qpi_req, InformationLevel) - 4);
+	pSMB->DataCount = 0;
+	pSMB->DataOffset = 0;
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
+	byte_count = params + 1 /* pad */ ;
+	pSMB->TotalParameterCount = cpu_to_le16(params);
+	pSMB->ParameterCount = pSMB->TotalParameterCount;
+	pSMB->InformationLevel = cpu_to_le16(SMB_INFO_QUERY_ALL_EAS);
+	pSMB->Reserved4 = 0;
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc) {
+		cifs_dbg(FYI, "Send error in QueryAllEAs = %d\n", rc);
+		goto QAllEAsOut;
+	}
+
+
+	/* BB also check enough total bytes returned */
+	/* BB we need to improve the validity checking
+	of these trans2 responses */
+
+	rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+	if (rc || get_bcc(&pSMBr->hdr) < 4) {
+		rc = -EIO;	/* bad smb */
+		goto QAllEAsOut;
+	}
+
+	/* check that length of list is not more than bcc */
+	/* check that each entry does not go beyond length
+	   of list */
+	/* check that each element of each entry does not
+	   go beyond end of list */
+	/* validate_trans2_offsets() */
+	/* BB check if start of smb + data_offset > &bcc+ bcc */
+
+	data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+	ea_response_data = (struct fealist *)
+				(((char *) &pSMBr->hdr.Protocol) + data_offset);
+
+	list_len = le32_to_cpu(ea_response_data->list_len);
+	cifs_dbg(FYI, "ea length %d\n", list_len);
+	if (list_len <= 8) {
+		cifs_dbg(FYI, "empty EA list returned from server\n");
+		/* didn't find the named attribute */
+		if (ea_name)
+			rc = -ENODATA;
+		goto QAllEAsOut;
+	}
+
+	/* make sure list_len doesn't go past end of SMB */
+	end_of_smb = (char *)pByteArea(&pSMBr->hdr) + get_bcc(&pSMBr->hdr);
+	if ((char *)ea_response_data + list_len > end_of_smb) {
+		cifs_dbg(FYI, "EA list appears to go beyond SMB\n");
+		rc = -EIO;
+		goto QAllEAsOut;
+	}
+
+	/* account for ea list len */
+	list_len -= 4;
+	temp_fea = &ea_response_data->list;
+	temp_ptr = (char *)temp_fea;
+	while (list_len > 0) {
+		unsigned int name_len;
+		__u16 value_len;
+
+		list_len -= 4;
+		temp_ptr += 4;
+		/* make sure we can read name_len and value_len */
+		if (list_len < 0) {
+			cifs_dbg(FYI, "EA entry goes beyond length of list\n");
+			rc = -EIO;
+			goto QAllEAsOut;
+		}
+
+		name_len = temp_fea->name_len;
+		value_len = le16_to_cpu(temp_fea->value_len);
+		list_len -= name_len + 1 + value_len;
+		if (list_len < 0) {
+			cifs_dbg(FYI, "EA entry goes beyond length of list\n");
+			rc = -EIO;
+			goto QAllEAsOut;
+		}
+
+		if (ea_name) {
+			if (ea_name_len == name_len &&
+			    memcmp(ea_name, temp_ptr, name_len) == 0) {
+				temp_ptr += name_len + 1;
+				rc = value_len;
+				if (buf_size == 0)
+					goto QAllEAsOut;
+				if ((size_t)value_len > buf_size) {
+					rc = -ERANGE;
+					goto QAllEAsOut;
+				}
+				memcpy(EAData, temp_ptr, value_len);
+				goto QAllEAsOut;
+			}
+		} else {
+			/* account for prefix user. and trailing null */
+			rc += (5 + 1 + name_len);
+			if (rc < (int) buf_size) {
+				memcpy(EAData, "user.", 5);
+				EAData += 5;
+				memcpy(EAData, temp_ptr, name_len);
+				EAData += name_len;
+				/* null terminate name */
+				*EAData = 0;
+				++EAData;
+			} else if (buf_size == 0) {
+				/* skip copy - calc size only */
+			} else {
+				/* stop before overrun buffer */
+				rc = -ERANGE;
+				break;
+			}
+		}
+		temp_ptr += name_len + 1 + value_len;
+		temp_fea = (struct fea *)temp_ptr;
+	}
+
+	/* didn't find the named attribute */
+	if (ea_name)
+		rc = -ENODATA;
+
+QAllEAsOut:
+	cifs_buf_release(pSMB);
+	if (rc == -EAGAIN)
+		goto QAllEAsRetry;
+
+	return (ssize_t)rc;
+}
+
+int
+CIFSSMBSetEA(const unsigned int xid, struct cifs_tcon *tcon,
+	     const char *fileName, const char *ea_name, const void *ea_value,
+	     const __u16 ea_value_len, const struct nls_table *nls_codepage,
+	     struct cifs_sb_info *cifs_sb)
+{
+	struct smb_com_transaction2_spi_req *pSMB = NULL;
+	struct smb_com_transaction2_spi_rsp *pSMBr = NULL;
+	struct fealist *parm_data;
+	int name_len;
+	int rc = 0;
+	int bytes_returned = 0;
+	__u16 params, param_offset, byte_count, offset, count;
+	int remap = cifs_remap(cifs_sb);
+
+	cifs_dbg(FYI, "In SetEA\n");
+SetEARetry:
+	rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+		      (void **) &pSMBr);
+	if (rc)
+		return rc;
+
+	if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+		name_len =
+		    cifsConvertToUTF16((__le16 *) pSMB->FileName, fileName,
+				       PATH_MAX, nls_codepage, remap);
+		name_len++;	/* trailing null */
+		name_len *= 2;
+	} else {
+		name_len = copy_path_name(pSMB->FileName, fileName);
+	}
+
+	params = 6 + name_len;
+
+	/* done calculating parms using name_len of file name,
+	now use name_len to calculate length of ea name
+	we are going to create in the inode xattrs */
+	if (ea_name == NULL)
+		name_len = 0;
+	else
+		name_len = strnlen(ea_name, 255);
+
+	count = sizeof(*parm_data) + 1 + ea_value_len + name_len;
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	/* BB find max SMB PDU from sess */
+	pSMB->MaxDataCount = cpu_to_le16(1000);
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	param_offset = offsetof(struct smb_com_transaction2_spi_req,
+				InformationLevel) - 4;
+	offset = param_offset + params;
+	pSMB->InformationLevel =
+		cpu_to_le16(SMB_SET_FILE_EA);
+
+	parm_data = (void *)pSMB + offsetof(struct smb_hdr, Protocol) + offset;
+	pSMB->ParameterOffset = cpu_to_le16(param_offset);
+	pSMB->DataOffset = cpu_to_le16(offset);
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
+	byte_count = 3 /* pad */  + params + count;
+	pSMB->DataCount = cpu_to_le16(count);
+	parm_data->list_len = cpu_to_le32(count);
+	parm_data->list.EA_flags = 0;
+	/* we checked above that name len is less than 255 */
+	parm_data->list.name_len = (__u8)name_len;
+	/* EA names are always ASCII */
+	if (ea_name)
+		strncpy(parm_data->list.name, ea_name, name_len);
+	parm_data->list.name[name_len] = '\0';
+	parm_data->list.value_len = cpu_to_le16(ea_value_len);
+	/* caller ensures that ea_value_len is less than 64K but
+	we need to ensure that it fits within the smb */
+
+	/*BB add length check to see if it would fit in
+	     negotiated SMB buffer size BB */
+	/* if (ea_value_len > buffer_size - 512 (enough for header)) */
+	if (ea_value_len)
+		memcpy(parm_data->list.name + name_len + 1,
+		       ea_value, ea_value_len);
+
+	pSMB->TotalDataCount = pSMB->DataCount;
+	pSMB->ParameterCount = cpu_to_le16(params);
+	pSMB->TotalParameterCount = pSMB->ParameterCount;
+	pSMB->Reserved4 = 0;
+	inc_rfc1001_len(pSMB, byte_count);
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc)
+		cifs_dbg(FYI, "SetPathInfo (EA) returned %d\n", rc);
+
+	cifs_buf_release(pSMB);
+
+	if (rc == -EAGAIN)
+		goto SetEARetry;
+
+	return rc;
+}
+#endif
diff --git a/fs/smb/client/connect.c b/fs/smb/client/connect.c
new file mode 100644
index 0000000000..0ed6eb915c
--- /dev/null
+++ b/fs/smb/client/connect.c
@@ -0,0 +1,4249 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *
+ *   Copyright (C) International Business Machines  Corp., 2002,2011
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ */
+#include <linux/fs.h>
+#include <linux/net.h>
+#include <linux/string.h>
+#include <linux/sched/mm.h>
+#include <linux/sched/signal.h>
+#include <linux/list.h>
+#include <linux/wait.h>
+#include <linux/slab.h>
+#include <linux/pagemap.h>
+#include <linux/ctype.h>
+#include <linux/utsname.h>
+#include <linux/mempool.h>
+#include <linux/delay.h>
+#include <linux/completion.h>
+#include <linux/kthread.h>
+#include <linux/pagevec.h>
+#include <linux/freezer.h>
+#include <linux/namei.h>
+#include <linux/uuid.h>
+#include <linux/uaccess.h>
+#include <asm/processor.h>
+#include <linux/inet.h>
+#include <linux/module.h>
+#include <keys/user-type.h>
+#include <net/ipv6.h>
+#include <linux/parser.h>
+#include <linux/bvec.h>
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_unicode.h"
+#include "cifs_debug.h"
+#include "cifs_fs_sb.h"
+#include "ntlmssp.h"
+#include "nterr.h"
+#include "rfc1002pdu.h"
+#include "fscache.h"
+#include "smb2proto.h"
+#include "smbdirect.h"
+#include "dns_resolve.h"
+#ifdef CONFIG_CIFS_DFS_UPCALL
+#include "dfs.h"
+#include "dfs_cache.h"
+#endif
+#include "fs_context.h"
+#include "cifs_swn.h"
+
+extern mempool_t *cifs_req_poolp;
+extern bool disable_legacy_dialects;
+
+/* FIXME: should these be tunable? */
+#define TLINK_ERROR_EXPIRE	(1 * HZ)
+#define TLINK_IDLE_EXPIRE	(600 * HZ)
+
+/* Drop the connection to not overload the server */
+#define MAX_STATUS_IO_TIMEOUT   5
+
+static int ip_connect(struct TCP_Server_Info *server);
+static int generic_ip_connect(struct TCP_Server_Info *server);
+static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink);
+static void cifs_prune_tlinks(struct work_struct *work);
+
+/*
+ * Resolve hostname and set ip addr in tcp ses. Useful for hostnames that may
+ * get their ip addresses changed at some point.
+ *
+ * This should be called with server->srv_mutex held.
+ */
+static int reconn_set_ipaddr_from_hostname(struct TCP_Server_Info *server)
+{
+	int rc;
+	int len;
+	char *unc;
+	struct sockaddr_storage ss;
+
+	if (!server->hostname)
+		return -EINVAL;
+
+	/* if server hostname isn't populated, there's nothing to do here */
+	if (server->hostname[0] == '\0')
+		return 0;
+
+	len = strlen(server->hostname) + 3;
+
+	unc = kmalloc(len, GFP_KERNEL);
+	if (!unc) {
+		cifs_dbg(FYI, "%s: failed to create UNC path\n", __func__);
+		return -ENOMEM;
+	}
+	scnprintf(unc, len, "\\\\%s", server->hostname);
+
+	spin_lock(&server->srv_lock);
+	ss = server->dstaddr;
+	spin_unlock(&server->srv_lock);
+
+	rc = dns_resolve_server_name_to_ip(unc, (struct sockaddr *)&ss, NULL);
+	kfree(unc);
+
+	if (rc < 0) {
+		cifs_dbg(FYI, "%s: failed to resolve server part of %s to IP: %d\n",
+			 __func__, server->hostname, rc);
+	} else {
+		spin_lock(&server->srv_lock);
+		memcpy(&server->dstaddr, &ss, sizeof(server->dstaddr));
+		spin_unlock(&server->srv_lock);
+		rc = 0;
+	}
+
+	return rc;
+}
+
+static void smb2_query_server_interfaces(struct work_struct *work)
+{
+	int rc;
+	struct cifs_tcon *tcon = container_of(work,
+					struct cifs_tcon,
+					query_interfaces.work);
+
+	/*
+	 * query server network interfaces, in case they change
+	 */
+	rc = SMB3_request_interfaces(0, tcon, false);
+	if (rc) {
+		if (rc == -EOPNOTSUPP)
+			return;
+
+		cifs_dbg(FYI, "%s: failed to query server interfaces: %d\n",
+				__func__, rc);
+	}
+
+	queue_delayed_work(cifsiod_wq, &tcon->query_interfaces,
+			   (SMB_INTERFACE_POLL_INTERVAL * HZ));
+}
+
+/*
+ * Update the tcpStatus for the server.
+ * This is used to signal the cifsd thread to call cifs_reconnect
+ * ONLY cifsd thread should call cifs_reconnect. For any other
+ * thread, use this function
+ *
+ * @server: the tcp ses for which reconnect is needed
+ * @all_channels: if this needs to be done for all channels
+ */
+void
+cifs_signal_cifsd_for_reconnect(struct TCP_Server_Info *server,
+				bool all_channels)
+{
+	struct TCP_Server_Info *pserver;
+	struct cifs_ses *ses;
+	int i;
+
+	/* If server is a channel, select the primary channel */
+	pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
+
+	/* if we need to signal just this channel */
+	if (!all_channels) {
+		spin_lock(&server->srv_lock);
+		if (server->tcpStatus != CifsExiting)
+			server->tcpStatus = CifsNeedReconnect;
+		spin_unlock(&server->srv_lock);
+		return;
+	}
+
+	spin_lock(&cifs_tcp_ses_lock);
+	list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
+		spin_lock(&ses->chan_lock);
+		for (i = 0; i < ses->chan_count; i++) {
+			if (!ses->chans[i].server)
+				continue;
+
+			spin_lock(&ses->chans[i].server->srv_lock);
+			if (ses->chans[i].server->tcpStatus != CifsExiting)
+				ses->chans[i].server->tcpStatus = CifsNeedReconnect;
+			spin_unlock(&ses->chans[i].server->srv_lock);
+		}
+		spin_unlock(&ses->chan_lock);
+	}
+	spin_unlock(&cifs_tcp_ses_lock);
+}
+
+/*
+ * Mark all sessions and tcons for reconnect.
+ * IMPORTANT: make sure that this gets called only from
+ * cifsd thread. For any other thread, use
+ * cifs_signal_cifsd_for_reconnect
+ *
+ * @server: the tcp ses for which reconnect is needed
+ * @server needs to be previously set to CifsNeedReconnect.
+ * @mark_smb_session: whether even sessions need to be marked
+ */
+void
+cifs_mark_tcp_ses_conns_for_reconnect(struct TCP_Server_Info *server,
+				      bool mark_smb_session)
+{
+	struct TCP_Server_Info *pserver;
+	struct cifs_ses *ses, *nses;
+	struct cifs_tcon *tcon;
+
+	/*
+	 * before reconnecting the tcp session, mark the smb session (uid) and the tid bad so they
+	 * are not used until reconnected.
+	 */
+	cifs_dbg(FYI, "%s: marking necessary sessions and tcons for reconnect\n", __func__);
+
+	/* If server is a channel, select the primary channel */
+	pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
+
+	/*
+	 * if the server has been marked for termination, there is a
+	 * chance that the remaining channels all need reconnect. To be
+	 * on the safer side, mark the session and trees for reconnect
+	 * for this scenario. This might cause a few redundant session
+	 * setup and tree connect requests, but it is better than not doing
+	 * a tree connect when needed, and all following requests failing
+	 */
+	if (server->terminate) {
+		mark_smb_session = true;
+		server = pserver;
+	}
+
+	spin_lock(&cifs_tcp_ses_lock);
+	list_for_each_entry_safe(ses, nses, &pserver->smb_ses_list, smb_ses_list) {
+		/* check if iface is still active */
+		spin_lock(&ses->chan_lock);
+		if (!cifs_chan_is_iface_active(ses, server)) {
+			spin_unlock(&ses->chan_lock);
+			cifs_chan_update_iface(ses, server);
+			spin_lock(&ses->chan_lock);
+		}
+
+		if (!mark_smb_session && cifs_chan_needs_reconnect(ses, server)) {
+			spin_unlock(&ses->chan_lock);
+			continue;
+		}
+
+		if (mark_smb_session)
+			CIFS_SET_ALL_CHANS_NEED_RECONNECT(ses);
+		else
+			cifs_chan_set_need_reconnect(ses, server);
+
+		cifs_dbg(FYI, "%s: channel connect bitmap: 0x%lx\n",
+			 __func__, ses->chans_need_reconnect);
+
+		/* If all channels need reconnect, then tcon needs reconnect */
+		if (!mark_smb_session && !CIFS_ALL_CHANS_NEED_RECONNECT(ses)) {
+			spin_unlock(&ses->chan_lock);
+			continue;
+		}
+		spin_unlock(&ses->chan_lock);
+
+		spin_lock(&ses->ses_lock);
+		ses->ses_status = SES_NEED_RECON;
+		spin_unlock(&ses->ses_lock);
+
+		list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
+			tcon->need_reconnect = true;
+			spin_lock(&tcon->tc_lock);
+			tcon->status = TID_NEED_RECON;
+			spin_unlock(&tcon->tc_lock);
+
+			cancel_delayed_work(&tcon->query_interfaces);
+		}
+		if (ses->tcon_ipc) {
+			ses->tcon_ipc->need_reconnect = true;
+			spin_lock(&ses->tcon_ipc->tc_lock);
+			ses->tcon_ipc->status = TID_NEED_RECON;
+			spin_unlock(&ses->tcon_ipc->tc_lock);
+		}
+	}
+	spin_unlock(&cifs_tcp_ses_lock);
+}
+
+static void
+cifs_abort_connection(struct TCP_Server_Info *server)
+{
+	struct mid_q_entry *mid, *nmid;
+	struct list_head retry_list;
+
+	server->maxBuf = 0;
+	server->max_read = 0;
+
+	/* do not want to be sending data on a socket we are freeing */
+	cifs_dbg(FYI, "%s: tearing down socket\n", __func__);
+	cifs_server_lock(server);
+	if (server->ssocket) {
+		cifs_dbg(FYI, "State: 0x%x Flags: 0x%lx\n", server->ssocket->state,
+			 server->ssocket->flags);
+		kernel_sock_shutdown(server->ssocket, SHUT_WR);
+		cifs_dbg(FYI, "Post shutdown state: 0x%x Flags: 0x%lx\n", server->ssocket->state,
+			 server->ssocket->flags);
+		sock_release(server->ssocket);
+		server->ssocket = NULL;
+	}
+	server->sequence_number = 0;
+	server->session_estab = false;
+	kfree_sensitive(server->session_key.response);
+	server->session_key.response = NULL;
+	server->session_key.len = 0;
+	server->lstrp = jiffies;
+
+	/* mark submitted MIDs for retry and issue callback */
+	INIT_LIST_HEAD(&retry_list);
+	cifs_dbg(FYI, "%s: moving mids to private list\n", __func__);
+	spin_lock(&server->mid_lock);
+	list_for_each_entry_safe(mid, nmid, &server->pending_mid_q, qhead) {
+		kref_get(&mid->refcount);
+		if (mid->mid_state == MID_REQUEST_SUBMITTED)
+			mid->mid_state = MID_RETRY_NEEDED;
+		list_move(&mid->qhead, &retry_list);
+		mid->mid_flags |= MID_DELETED;
+	}
+	spin_unlock(&server->mid_lock);
+	cifs_server_unlock(server);
+
+	cifs_dbg(FYI, "%s: issuing mid callbacks\n", __func__);
+	list_for_each_entry_safe(mid, nmid, &retry_list, qhead) {
+		list_del_init(&mid->qhead);
+		mid->callback(mid);
+		release_mid(mid);
+	}
+
+	if (cifs_rdma_enabled(server)) {
+		cifs_server_lock(server);
+		smbd_destroy(server);
+		cifs_server_unlock(server);
+	}
+}
+
+static bool cifs_tcp_ses_needs_reconnect(struct TCP_Server_Info *server, int num_targets)
+{
+	spin_lock(&server->srv_lock);
+	server->nr_targets = num_targets;
+	if (server->tcpStatus == CifsExiting) {
+		/* the demux thread will exit normally next time through the loop */
+		spin_unlock(&server->srv_lock);
+		wake_up(&server->response_q);
+		return false;
+	}
+
+	cifs_dbg(FYI, "Mark tcp session as need reconnect\n");
+	trace_smb3_reconnect(server->CurrentMid, server->conn_id,
+			     server->hostname);
+	server->tcpStatus = CifsNeedReconnect;
+
+	spin_unlock(&server->srv_lock);
+	return true;
+}
+
+/*
+ * cifs tcp session reconnection
+ *
+ * mark tcp session as reconnecting so temporarily locked
+ * mark all smb sessions as reconnecting for tcp session
+ * reconnect tcp session
+ * wake up waiters on reconnection? - (not needed currently)
+ *
+ * if mark_smb_session is passed as true, unconditionally mark
+ * the smb session (and tcon) for reconnect as well. This value
+ * doesn't really matter for non-multichannel scenario.
+ *
+ */
+static int __cifs_reconnect(struct TCP_Server_Info *server,
+			    bool mark_smb_session)
+{
+	int rc = 0;
+
+	if (!cifs_tcp_ses_needs_reconnect(server, 1))
+		return 0;
+
+	cifs_mark_tcp_ses_conns_for_reconnect(server, mark_smb_session);
+
+	cifs_abort_connection(server);
+
+	do {
+		try_to_freeze();
+		cifs_server_lock(server);
+
+		if (!cifs_swn_set_server_dstaddr(server)) {
+			/* resolve the hostname again to make sure that IP address is up-to-date */
+			rc = reconn_set_ipaddr_from_hostname(server);
+			cifs_dbg(FYI, "%s: reconn_set_ipaddr_from_hostname: rc=%d\n", __func__, rc);
+		}
+
+		if (cifs_rdma_enabled(server))
+			rc = smbd_reconnect(server);
+		else
+			rc = generic_ip_connect(server);
+		if (rc) {
+			cifs_server_unlock(server);
+			cifs_dbg(FYI, "%s: reconnect error %d\n", __func__, rc);
+			msleep(3000);
+		} else {
+			atomic_inc(&tcpSesReconnectCount);
+			set_credits(server, 1);
+			spin_lock(&server->srv_lock);
+			if (server->tcpStatus != CifsExiting)
+				server->tcpStatus = CifsNeedNegotiate;
+			spin_unlock(&server->srv_lock);
+			cifs_swn_reset_server_dstaddr(server);
+			cifs_server_unlock(server);
+			mod_delayed_work(cifsiod_wq, &server->reconnect, 0);
+		}
+	} while (server->tcpStatus == CifsNeedReconnect);
+
+	spin_lock(&server->srv_lock);
+	if (server->tcpStatus == CifsNeedNegotiate)
+		mod_delayed_work(cifsiod_wq, &server->echo, 0);
+	spin_unlock(&server->srv_lock);
+
+	wake_up(&server->response_q);
+	return rc;
+}
+
+#ifdef CONFIG_CIFS_DFS_UPCALL
+static int __reconnect_target_unlocked(struct TCP_Server_Info *server, const char *target)
+{
+	int rc;
+	char *hostname;
+
+	if (!cifs_swn_set_server_dstaddr(server)) {
+		if (server->hostname != target) {
+			hostname = extract_hostname(target);
+			if (!IS_ERR(hostname)) {
+				spin_lock(&server->srv_lock);
+				kfree(server->hostname);
+				server->hostname = hostname;
+				spin_unlock(&server->srv_lock);
+			} else {
+				cifs_dbg(FYI, "%s: couldn't extract hostname or address from dfs target: %ld\n",
+					 __func__, PTR_ERR(hostname));
+				cifs_dbg(FYI, "%s: default to last target server: %s\n", __func__,
+					 server->hostname);
+			}
+		}
+		/* resolve the hostname again to make sure that IP address is up-to-date. */
+		rc = reconn_set_ipaddr_from_hostname(server);
+		cifs_dbg(FYI, "%s: reconn_set_ipaddr_from_hostname: rc=%d\n", __func__, rc);
+	}
+	/* Reconnect the socket */
+	if (cifs_rdma_enabled(server))
+		rc = smbd_reconnect(server);
+	else
+		rc = generic_ip_connect(server);
+
+	return rc;
+}
+
+static int reconnect_target_unlocked(struct TCP_Server_Info *server, struct dfs_cache_tgt_list *tl,
+				     struct dfs_cache_tgt_iterator **target_hint)
+{
+	int rc;
+	struct dfs_cache_tgt_iterator *tit;
+
+	*target_hint = NULL;
+
+	/* If dfs target list is empty, then reconnect to last server */
+	tit = dfs_cache_get_tgt_iterator(tl);
+	if (!tit)
+		return __reconnect_target_unlocked(server, server->hostname);
+
+	/* Otherwise, try every dfs target in @tl */
+	for (; tit; tit = dfs_cache_get_next_tgt(tl, tit)) {
+		rc = __reconnect_target_unlocked(server, dfs_cache_get_tgt_name(tit));
+		if (!rc) {
+			*target_hint = tit;
+			break;
+		}
+	}
+	return rc;
+}
+
+static int reconnect_dfs_server(struct TCP_Server_Info *server)
+{
+	struct dfs_cache_tgt_iterator *target_hint = NULL;
+	DFS_CACHE_TGT_LIST(tl);
+	int num_targets = 0;
+	int rc = 0;
+
+	/*
+	 * Determine the number of dfs targets the referral path in @cifs_sb resolves to.
+	 *
+	 * smb2_reconnect() needs to know how long it should wait based upon the number of dfs
+	 * targets (server->nr_targets).  It's also possible that the cached referral was cleared
+	 * through /proc/fs/cifs/dfscache or the target list is empty due to server settings after
+	 * refreshing the referral, so, in this case, default it to 1.
+	 */
+	mutex_lock(&server->refpath_lock);
+	if (!dfs_cache_noreq_find(server->leaf_fullpath + 1, NULL, &tl))
+		num_targets = dfs_cache_get_nr_tgts(&tl);
+	mutex_unlock(&server->refpath_lock);
+	if (!num_targets)
+		num_targets = 1;
+
+	if (!cifs_tcp_ses_needs_reconnect(server, num_targets))
+		return 0;
+
+	/*
+	 * Unconditionally mark all sessions & tcons for reconnect as we might be connecting to a
+	 * different server or share during failover.  It could be improved by adding some logic to
+	 * only do that in case it connects to a different server or share, though.
+	 */
+	cifs_mark_tcp_ses_conns_for_reconnect(server, true);
+
+	cifs_abort_connection(server);
+
+	do {
+		try_to_freeze();
+		cifs_server_lock(server);
+
+		rc = reconnect_target_unlocked(server, &tl, &target_hint);
+		if (rc) {
+			/* Failed to reconnect socket */
+			cifs_server_unlock(server);
+			cifs_dbg(FYI, "%s: reconnect error %d\n", __func__, rc);
+			msleep(3000);
+			continue;
+		}
+		/*
+		 * Socket was created.  Update tcp session status to CifsNeedNegotiate so that a
+		 * process waiting for reconnect will know it needs to re-establish session and tcon
+		 * through the reconnected target server.
+		 */
+		atomic_inc(&tcpSesReconnectCount);
+		set_credits(server, 1);
+		spin_lock(&server->srv_lock);
+		if (server->tcpStatus != CifsExiting)
+			server->tcpStatus = CifsNeedNegotiate;
+		spin_unlock(&server->srv_lock);
+		cifs_swn_reset_server_dstaddr(server);
+		cifs_server_unlock(server);
+		mod_delayed_work(cifsiod_wq, &server->reconnect, 0);
+	} while (server->tcpStatus == CifsNeedReconnect);
+
+	mutex_lock(&server->refpath_lock);
+	dfs_cache_noreq_update_tgthint(server->leaf_fullpath + 1, target_hint);
+	mutex_unlock(&server->refpath_lock);
+	dfs_cache_free_tgts(&tl);
+
+	/* Need to set up echo worker again once connection has been established */
+	spin_lock(&server->srv_lock);
+	if (server->tcpStatus == CifsNeedNegotiate)
+		mod_delayed_work(cifsiod_wq, &server->echo, 0);
+	spin_unlock(&server->srv_lock);
+
+	wake_up(&server->response_q);
+	return rc;
+}
+
+int cifs_reconnect(struct TCP_Server_Info *server, bool mark_smb_session)
+{
+	mutex_lock(&server->refpath_lock);
+	if (!server->leaf_fullpath) {
+		mutex_unlock(&server->refpath_lock);
+		return __cifs_reconnect(server, mark_smb_session);
+	}
+	mutex_unlock(&server->refpath_lock);
+
+	return reconnect_dfs_server(server);
+}
+#else
+int cifs_reconnect(struct TCP_Server_Info *server, bool mark_smb_session)
+{
+	return __cifs_reconnect(server, mark_smb_session);
+}
+#endif
+
+static void
+cifs_echo_request(struct work_struct *work)
+{
+	int rc;
+	struct TCP_Server_Info *server = container_of(work,
+					struct TCP_Server_Info, echo.work);
+
+	/*
+	 * We cannot send an echo if it is disabled.
+	 * Also, no need to ping if we got a response recently.
+	 */
+
+	if (server->tcpStatus == CifsNeedReconnect ||
+	    server->tcpStatus == CifsExiting ||
+	    server->tcpStatus == CifsNew ||
+	    (server->ops->can_echo && !server->ops->can_echo(server)) ||
+	    time_before(jiffies, server->lstrp + server->echo_interval - HZ))
+		goto requeue_echo;
+
+	rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS;
+	cifs_server_dbg(FYI, "send echo request: rc = %d\n", rc);
+
+	/* Check witness registrations */
+	cifs_swn_check();
+
+requeue_echo:
+	queue_delayed_work(cifsiod_wq, &server->echo, server->echo_interval);
+}
+
+static bool
+allocate_buffers(struct TCP_Server_Info *server)
+{
+	if (!server->bigbuf) {
+		server->bigbuf = (char *)cifs_buf_get();
+		if (!server->bigbuf) {
+			cifs_server_dbg(VFS, "No memory for large SMB response\n");
+			msleep(3000);
+			/* retry will check if exiting */
+			return false;
+		}
+	} else if (server->large_buf) {
+		/* we are reusing a dirty large buf, clear its start */
+		memset(server->bigbuf, 0, HEADER_SIZE(server));
+	}
+
+	if (!server->smallbuf) {
+		server->smallbuf = (char *)cifs_small_buf_get();
+		if (!server->smallbuf) {
+			cifs_server_dbg(VFS, "No memory for SMB response\n");
+			msleep(1000);
+			/* retry will check if exiting */
+			return false;
+		}
+		/* beginning of smb buffer is cleared in our buf_get */
+	} else {
+		/* if existing small buf clear beginning */
+		memset(server->smallbuf, 0, HEADER_SIZE(server));
+	}
+
+	return true;
+}
+
+static bool
+server_unresponsive(struct TCP_Server_Info *server)
+{
+	/*
+	 * We need to wait 3 echo intervals to make sure we handle such
+	 * situations right:
+	 * 1s  client sends a normal SMB request
+	 * 2s  client gets a response
+	 * 30s echo workqueue job pops, and decides we got a response recently
+	 *     and don't need to send another
+	 * ...
+	 * 65s kernel_recvmsg times out, and we see that we haven't gotten
+	 *     a response in >60s.
+	 */
+	spin_lock(&server->srv_lock);
+	if ((server->tcpStatus == CifsGood ||
+	    server->tcpStatus == CifsNeedNegotiate) &&
+	    (!server->ops->can_echo || server->ops->can_echo(server)) &&
+	    time_after(jiffies, server->lstrp + 3 * server->echo_interval)) {
+		spin_unlock(&server->srv_lock);
+		cifs_server_dbg(VFS, "has not responded in %lu seconds. Reconnecting...\n",
+			 (3 * server->echo_interval) / HZ);
+		cifs_reconnect(server, false);
+		return true;
+	}
+	spin_unlock(&server->srv_lock);
+
+	return false;
+}
+
+static inline bool
+zero_credits(struct TCP_Server_Info *server)
+{
+	int val;
+
+	spin_lock(&server->req_lock);
+	val = server->credits + server->echo_credits + server->oplock_credits;
+	if (server->in_flight == 0 && val == 0) {
+		spin_unlock(&server->req_lock);
+		return true;
+	}
+	spin_unlock(&server->req_lock);
+	return false;
+}
+
+static int
+cifs_readv_from_socket(struct TCP_Server_Info *server, struct msghdr *smb_msg)
+{
+	int length = 0;
+	int total_read;
+
+	for (total_read = 0; msg_data_left(smb_msg); total_read += length) {
+		try_to_freeze();
+
+		/* reconnect if no credits and no requests in flight */
+		if (zero_credits(server)) {
+			cifs_reconnect(server, false);
+			return -ECONNABORTED;
+		}
+
+		if (server_unresponsive(server))
+			return -ECONNABORTED;
+		if (cifs_rdma_enabled(server) && server->smbd_conn)
+			length = smbd_recv(server->smbd_conn, smb_msg);
+		else
+			length = sock_recvmsg(server->ssocket, smb_msg, 0);
+
+		spin_lock(&server->srv_lock);
+		if (server->tcpStatus == CifsExiting) {
+			spin_unlock(&server->srv_lock);
+			return -ESHUTDOWN;
+		}
+
+		if (server->tcpStatus == CifsNeedReconnect) {
+			spin_unlock(&server->srv_lock);
+			cifs_reconnect(server, false);
+			return -ECONNABORTED;
+		}
+		spin_unlock(&server->srv_lock);
+
+		if (length == -ERESTARTSYS ||
+		    length == -EAGAIN ||
+		    length == -EINTR) {
+			/*
+			 * Minimum sleep to prevent looping, allowing socket
+			 * to clear and app threads to set tcpStatus
+			 * CifsNeedReconnect if server hung.
+			 */
+			usleep_range(1000, 2000);
+			length = 0;
+			continue;
+		}
+
+		if (length <= 0) {
+			cifs_dbg(FYI, "Received no data or error: %d\n", length);
+			cifs_reconnect(server, false);
+			return -ECONNABORTED;
+		}
+	}
+	return total_read;
+}
+
+int
+cifs_read_from_socket(struct TCP_Server_Info *server, char *buf,
+		      unsigned int to_read)
+{
+	struct msghdr smb_msg = {};
+	struct kvec iov = {.iov_base = buf, .iov_len = to_read};
+	iov_iter_kvec(&smb_msg.msg_iter, ITER_DEST, &iov, 1, to_read);
+
+	return cifs_readv_from_socket(server, &smb_msg);
+}
+
+ssize_t
+cifs_discard_from_socket(struct TCP_Server_Info *server, size_t to_read)
+{
+	struct msghdr smb_msg = {};
+
+	/*
+	 *  iov_iter_discard already sets smb_msg.type and count and iov_offset
+	 *  and cifs_readv_from_socket sets msg_control and msg_controllen
+	 *  so little to initialize in struct msghdr
+	 */
+	iov_iter_discard(&smb_msg.msg_iter, ITER_DEST, to_read);
+
+	return cifs_readv_from_socket(server, &smb_msg);
+}
+
+int
+cifs_read_page_from_socket(struct TCP_Server_Info *server, struct page *page,
+	unsigned int page_offset, unsigned int to_read)
+{
+	struct msghdr smb_msg = {};
+	struct bio_vec bv;
+
+	bvec_set_page(&bv, page, to_read, page_offset);
+	iov_iter_bvec(&smb_msg.msg_iter, ITER_DEST, &bv, 1, to_read);
+	return cifs_readv_from_socket(server, &smb_msg);
+}
+
+int
+cifs_read_iter_from_socket(struct TCP_Server_Info *server, struct iov_iter *iter,
+			   unsigned int to_read)
+{
+	struct msghdr smb_msg = { .msg_iter = *iter };
+	int ret;
+
+	iov_iter_truncate(&smb_msg.msg_iter, to_read);
+	ret = cifs_readv_from_socket(server, &smb_msg);
+	if (ret > 0)
+		iov_iter_advance(iter, ret);
+	return ret;
+}
+
+static bool
+is_smb_response(struct TCP_Server_Info *server, unsigned char type)
+{
+	/*
+	 * The first byte big endian of the length field,
+	 * is actually not part of the length but the type
+	 * with the most common, zero, as regular data.
+	 */
+	switch (type) {
+	case RFC1002_SESSION_MESSAGE:
+		/* Regular SMB response */
+		return true;
+	case RFC1002_SESSION_KEEP_ALIVE:
+		cifs_dbg(FYI, "RFC 1002 session keep alive\n");
+		break;
+	case RFC1002_POSITIVE_SESSION_RESPONSE:
+		cifs_dbg(FYI, "RFC 1002 positive session response\n");
+		break;
+	case RFC1002_NEGATIVE_SESSION_RESPONSE:
+		/*
+		 * We get this from Windows 98 instead of an error on
+		 * SMB negprot response.
+		 */
+		cifs_dbg(FYI, "RFC 1002 negative session response\n");
+		/* give server a second to clean up */
+		msleep(1000);
+		/*
+		 * Always try 445 first on reconnect since we get NACK
+		 * on some if we ever connected to port 139 (the NACK
+		 * is since we do not begin with RFC1001 session
+		 * initialize frame).
+		 */
+		cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT);
+		cifs_reconnect(server, true);
+		break;
+	default:
+		cifs_server_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", type);
+		cifs_reconnect(server, true);
+	}
+
+	return false;
+}
+
+void
+dequeue_mid(struct mid_q_entry *mid, bool malformed)
+{
+#ifdef CONFIG_CIFS_STATS2
+	mid->when_received = jiffies;
+#endif
+	spin_lock(&mid->server->mid_lock);
+	if (!malformed)
+		mid->mid_state = MID_RESPONSE_RECEIVED;
+	else
+		mid->mid_state = MID_RESPONSE_MALFORMED;
+	/*
+	 * Trying to handle/dequeue a mid after the send_recv()
+	 * function has finished processing it is a bug.
+	 */
+	if (mid->mid_flags & MID_DELETED) {
+		spin_unlock(&mid->server->mid_lock);
+		pr_warn_once("trying to dequeue a deleted mid\n");
+	} else {
+		list_del_init(&mid->qhead);
+		mid->mid_flags |= MID_DELETED;
+		spin_unlock(&mid->server->mid_lock);
+	}
+}
+
+static unsigned int
+smb2_get_credits_from_hdr(char *buffer, struct TCP_Server_Info *server)
+{
+	struct smb2_hdr *shdr = (struct smb2_hdr *)buffer;
+
+	/*
+	 * SMB1 does not use credits.
+	 */
+	if (is_smb1(server))
+		return 0;
+
+	return le16_to_cpu(shdr->CreditRequest);
+}
+
+static void
+handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server,
+	   char *buf, int malformed)
+{
+	if (server->ops->check_trans2 &&
+	    server->ops->check_trans2(mid, server, buf, malformed))
+		return;
+	mid->credits_received = smb2_get_credits_from_hdr(buf, server);
+	mid->resp_buf = buf;
+	mid->large_buf = server->large_buf;
+	/* Was previous buf put in mpx struct for multi-rsp? */
+	if (!mid->multiRsp) {
+		/* smb buffer will be freed by user thread */
+		if (server->large_buf)
+			server->bigbuf = NULL;
+		else
+			server->smallbuf = NULL;
+	}
+	dequeue_mid(mid, malformed);
+}
+
+int
+cifs_enable_signing(struct TCP_Server_Info *server, bool mnt_sign_required)
+{
+	bool srv_sign_required = server->sec_mode & server->vals->signing_required;
+	bool srv_sign_enabled = server->sec_mode & server->vals->signing_enabled;
+	bool mnt_sign_enabled;
+
+	/*
+	 * Is signing required by mnt options? If not then check
+	 * global_secflags to see if it is there.
+	 */
+	if (!mnt_sign_required)
+		mnt_sign_required = ((global_secflags & CIFSSEC_MUST_SIGN) ==
+						CIFSSEC_MUST_SIGN);
+
+	/*
+	 * If signing is required then it's automatically enabled too,
+	 * otherwise, check to see if the secflags allow it.
+	 */
+	mnt_sign_enabled = mnt_sign_required ? mnt_sign_required :
+				(global_secflags & CIFSSEC_MAY_SIGN);
+
+	/* If server requires signing, does client allow it? */
+	if (srv_sign_required) {
+		if (!mnt_sign_enabled) {
+			cifs_dbg(VFS, "Server requires signing, but it's disabled in SecurityFlags!\n");
+			return -EOPNOTSUPP;
+		}
+		server->sign = true;
+	}
+
+	/* If client requires signing, does server allow it? */
+	if (mnt_sign_required) {
+		if (!srv_sign_enabled) {
+			cifs_dbg(VFS, "Server does not support signing!\n");
+			return -EOPNOTSUPP;
+		}
+		server->sign = true;
+	}
+
+	if (cifs_rdma_enabled(server) && server->sign)
+		cifs_dbg(VFS, "Signing is enabled, and RDMA read/write will be disabled\n");
+
+	return 0;
+}
+
+static noinline_for_stack void
+clean_demultiplex_info(struct TCP_Server_Info *server)
+{
+	int length;
+
+	/* take it off the list, if it's not already */
+	spin_lock(&server->srv_lock);
+	list_del_init(&server->tcp_ses_list);
+	spin_unlock(&server->srv_lock);
+
+	cancel_delayed_work_sync(&server->echo);
+
+	spin_lock(&server->srv_lock);
+	server->tcpStatus = CifsExiting;
+	spin_unlock(&server->srv_lock);
+	wake_up_all(&server->response_q);
+
+	/* check if we have blocked requests that need to free */
+	spin_lock(&server->req_lock);
+	if (server->credits <= 0)
+		server->credits = 1;
+	spin_unlock(&server->req_lock);
+	/*
+	 * Although there should not be any requests blocked on this queue it
+	 * can not hurt to be paranoid and try to wake up requests that may
+	 * haven been blocked when more than 50 at time were on the wire to the
+	 * same server - they now will see the session is in exit state and get
+	 * out of SendReceive.
+	 */
+	wake_up_all(&server->request_q);
+	/* give those requests time to exit */
+	msleep(125);
+	if (cifs_rdma_enabled(server))
+		smbd_destroy(server);
+	if (server->ssocket) {
+		sock_release(server->ssocket);
+		server->ssocket = NULL;
+	}
+
+	if (!list_empty(&server->pending_mid_q)) {
+		struct list_head dispose_list;
+		struct mid_q_entry *mid_entry;
+		struct list_head *tmp, *tmp2;
+
+		INIT_LIST_HEAD(&dispose_list);
+		spin_lock(&server->mid_lock);
+		list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
+			mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
+			cifs_dbg(FYI, "Clearing mid %llu\n", mid_entry->mid);
+			kref_get(&mid_entry->refcount);
+			mid_entry->mid_state = MID_SHUTDOWN;
+			list_move(&mid_entry->qhead, &dispose_list);
+			mid_entry->mid_flags |= MID_DELETED;
+		}
+		spin_unlock(&server->mid_lock);
+
+		/* now walk dispose list and issue callbacks */
+		list_for_each_safe(tmp, tmp2, &dispose_list) {
+			mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
+			cifs_dbg(FYI, "Callback mid %llu\n", mid_entry->mid);
+			list_del_init(&mid_entry->qhead);
+			mid_entry->callback(mid_entry);
+			release_mid(mid_entry);
+		}
+		/* 1/8th of sec is more than enough time for them to exit */
+		msleep(125);
+	}
+
+	if (!list_empty(&server->pending_mid_q)) {
+		/*
+		 * mpx threads have not exited yet give them at least the smb
+		 * send timeout time for long ops.
+		 *
+		 * Due to delays on oplock break requests, we need to wait at
+		 * least 45 seconds before giving up on a request getting a
+		 * response and going ahead and killing cifsd.
+		 */
+		cifs_dbg(FYI, "Wait for exit from demultiplex thread\n");
+		msleep(46000);
+		/*
+		 * If threads still have not exited they are probably never
+		 * coming home not much else we can do but free the memory.
+		 */
+	}
+
+	kfree(server->leaf_fullpath);
+	kfree(server);
+
+	length = atomic_dec_return(&tcpSesAllocCount);
+	if (length > 0)
+		mempool_resize(cifs_req_poolp, length + cifs_min_rcv);
+}
+
+static int
+standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid)
+{
+	int length;
+	char *buf = server->smallbuf;
+	unsigned int pdu_length = server->pdu_size;
+
+	/* make sure this will fit in a large buffer */
+	if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) -
+	    HEADER_PREAMBLE_SIZE(server)) {
+		cifs_server_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length);
+		cifs_reconnect(server, true);
+		return -ECONNABORTED;
+	}
+
+	/* switch to large buffer if too big for a small one */
+	if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
+		server->large_buf = true;
+		memcpy(server->bigbuf, buf, server->total_read);
+		buf = server->bigbuf;
+	}
+
+	/* now read the rest */
+	length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
+				       pdu_length - MID_HEADER_SIZE(server));
+
+	if (length < 0)
+		return length;
+	server->total_read += length;
+
+	dump_smb(buf, server->total_read);
+
+	return cifs_handle_standard(server, mid);
+}
+
+int
+cifs_handle_standard(struct TCP_Server_Info *server, struct mid_q_entry *mid)
+{
+	char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
+	int rc;
+
+	/*
+	 * We know that we received enough to get to the MID as we
+	 * checked the pdu_length earlier. Now check to see
+	 * if the rest of the header is OK.
+	 *
+	 * 48 bytes is enough to display the header and a little bit
+	 * into the payload for debugging purposes.
+	 */
+	rc = server->ops->check_message(buf, server->total_read, server);
+	if (rc)
+		cifs_dump_mem("Bad SMB: ", buf,
+			min_t(unsigned int, server->total_read, 48));
+
+	if (server->ops->is_session_expired &&
+	    server->ops->is_session_expired(buf)) {
+		cifs_reconnect(server, true);
+		return -1;
+	}
+
+	if (server->ops->is_status_pending &&
+	    server->ops->is_status_pending(buf, server))
+		return -1;
+
+	if (!mid)
+		return rc;
+
+	handle_mid(mid, server, buf, rc);
+	return 0;
+}
+
+static void
+smb2_add_credits_from_hdr(char *buffer, struct TCP_Server_Info *server)
+{
+	struct smb2_hdr *shdr = (struct smb2_hdr *)buffer;
+	int scredits, in_flight;
+
+	/*
+	 * SMB1 does not use credits.
+	 */
+	if (is_smb1(server))
+		return;
+
+	if (shdr->CreditRequest) {
+		spin_lock(&server->req_lock);
+		server->credits += le16_to_cpu(shdr->CreditRequest);
+		scredits = server->credits;
+		in_flight = server->in_flight;
+		spin_unlock(&server->req_lock);
+		wake_up(&server->request_q);
+
+		trace_smb3_hdr_credits(server->CurrentMid,
+				server->conn_id, server->hostname, scredits,
+				le16_to_cpu(shdr->CreditRequest), in_flight);
+		cifs_server_dbg(FYI, "%s: added %u credits total=%d\n",
+				__func__, le16_to_cpu(shdr->CreditRequest),
+				scredits);
+	}
+}
+
+
+static int
+cifs_demultiplex_thread(void *p)
+{
+	int i, num_mids, length;
+	struct TCP_Server_Info *server = p;
+	unsigned int pdu_length;
+	unsigned int next_offset;
+	char *buf = NULL;
+	struct task_struct *task_to_wake = NULL;
+	struct mid_q_entry *mids[MAX_COMPOUND];
+	char *bufs[MAX_COMPOUND];
+	unsigned int noreclaim_flag, num_io_timeout = 0;
+	bool pending_reconnect = false;
+
+	noreclaim_flag = memalloc_noreclaim_save();
+	cifs_dbg(FYI, "Demultiplex PID: %d\n", task_pid_nr(current));
+
+	length = atomic_inc_return(&tcpSesAllocCount);
+	if (length > 1)
+		mempool_resize(cifs_req_poolp, length + cifs_min_rcv);
+
+	set_freezable();
+	allow_kernel_signal(SIGKILL);
+	while (server->tcpStatus != CifsExiting) {
+		if (try_to_freeze())
+			continue;
+
+		if (!allocate_buffers(server))
+			continue;
+
+		server->large_buf = false;
+		buf = server->smallbuf;
+		pdu_length = 4; /* enough to get RFC1001 header */
+
+		length = cifs_read_from_socket(server, buf, pdu_length);
+		if (length < 0)
+			continue;
+
+		if (is_smb1(server))
+			server->total_read = length;
+		else
+			server->total_read = 0;
+
+		/*
+		 * The right amount was read from socket - 4 bytes,
+		 * so we can now interpret the length field.
+		 */
+		pdu_length = get_rfc1002_length(buf);
+
+		cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length);
+		if (!is_smb_response(server, buf[0]))
+			continue;
+
+		pending_reconnect = false;
+next_pdu:
+		server->pdu_size = pdu_length;
+
+		/* make sure we have enough to get to the MID */
+		if (server->pdu_size < MID_HEADER_SIZE(server)) {
+			cifs_server_dbg(VFS, "SMB response too short (%u bytes)\n",
+				 server->pdu_size);
+			cifs_reconnect(server, true);
+			continue;
+		}
+
+		/* read down to the MID */
+		length = cifs_read_from_socket(server,
+			     buf + HEADER_PREAMBLE_SIZE(server),
+			     MID_HEADER_SIZE(server));
+		if (length < 0)
+			continue;
+		server->total_read += length;
+
+		if (server->ops->next_header) {
+			if (server->ops->next_header(server, buf, &next_offset)) {
+				cifs_dbg(VFS, "%s: malformed response (next_offset=%u)\n",
+					 __func__, next_offset);
+				cifs_reconnect(server, true);
+				continue;
+			}
+			if (next_offset)
+				server->pdu_size = next_offset;
+		}
+
+		memset(mids, 0, sizeof(mids));
+		memset(bufs, 0, sizeof(bufs));
+		num_mids = 0;
+
+		if (server->ops->is_transform_hdr &&
+		    server->ops->receive_transform &&
+		    server->ops->is_transform_hdr(buf)) {
+			length = server->ops->receive_transform(server,
+								mids,
+								bufs,
+								&num_mids);
+		} else {
+			mids[0] = server->ops->find_mid(server, buf);
+			bufs[0] = buf;
+			num_mids = 1;
+
+			if (!mids[0] || !mids[0]->receive)
+				length = standard_receive3(server, mids[0]);
+			else
+				length = mids[0]->receive(server, mids[0]);
+		}
+
+		if (length < 0) {
+			for (i = 0; i < num_mids; i++)
+				if (mids[i])
+					release_mid(mids[i]);
+			continue;
+		}
+
+		if (server->ops->is_status_io_timeout &&
+		    server->ops->is_status_io_timeout(buf)) {
+			num_io_timeout++;
+			if (num_io_timeout > MAX_STATUS_IO_TIMEOUT) {
+				cifs_server_dbg(VFS,
+						"Number of request timeouts exceeded %d. Reconnecting",
+						MAX_STATUS_IO_TIMEOUT);
+
+				pending_reconnect = true;
+				num_io_timeout = 0;
+			}
+		}
+
+		server->lstrp = jiffies;
+
+		for (i = 0; i < num_mids; i++) {
+			if (mids[i] != NULL) {
+				mids[i]->resp_buf_size = server->pdu_size;
+
+				if (bufs[i] != NULL) {
+					if (server->ops->is_network_name_deleted &&
+					    server->ops->is_network_name_deleted(bufs[i],
+										 server)) {
+						cifs_server_dbg(FYI,
+								"Share deleted. Reconnect needed");
+					}
+				}
+
+				if (!mids[i]->multiRsp || mids[i]->multiEnd)
+					mids[i]->callback(mids[i]);
+
+				release_mid(mids[i]);
+			} else if (server->ops->is_oplock_break &&
+				   server->ops->is_oplock_break(bufs[i],
+								server)) {
+				smb2_add_credits_from_hdr(bufs[i], server);
+				cifs_dbg(FYI, "Received oplock break\n");
+			} else {
+				cifs_server_dbg(VFS, "No task to wake, unknown frame received! NumMids %d\n",
+						atomic_read(&mid_count));
+				cifs_dump_mem("Received Data is: ", bufs[i],
+					      HEADER_SIZE(server));
+				smb2_add_credits_from_hdr(bufs[i], server);
+#ifdef CONFIG_CIFS_DEBUG2
+				if (server->ops->dump_detail)
+					server->ops->dump_detail(bufs[i],
+								 server);
+				cifs_dump_mids(server);
+#endif /* CIFS_DEBUG2 */
+			}
+		}
+
+		if (pdu_length > server->pdu_size) {
+			if (!allocate_buffers(server))
+				continue;
+			pdu_length -= server->pdu_size;
+			server->total_read = 0;
+			server->large_buf = false;
+			buf = server->smallbuf;
+			goto next_pdu;
+		}
+
+		/* do this reconnect at the very end after processing all MIDs */
+		if (pending_reconnect)
+			cifs_reconnect(server, true);
+
+	} /* end while !EXITING */
+
+	/* buffer usually freed in free_mid - need to free it here on exit */
+	cifs_buf_release(server->bigbuf);
+	if (server->smallbuf) /* no sense logging a debug message if NULL */
+		cifs_small_buf_release(server->smallbuf);
+
+	task_to_wake = xchg(&server->tsk, NULL);
+	clean_demultiplex_info(server);
+
+	/* if server->tsk was NULL then wait for a signal before exiting */
+	if (!task_to_wake) {
+		set_current_state(TASK_INTERRUPTIBLE);
+		while (!signal_pending(current)) {
+			schedule();
+			set_current_state(TASK_INTERRUPTIBLE);
+		}
+		set_current_state(TASK_RUNNING);
+	}
+
+	memalloc_noreclaim_restore(noreclaim_flag);
+	module_put_and_kthread_exit(0);
+}
+
+int
+cifs_ipaddr_cmp(struct sockaddr *srcaddr, struct sockaddr *rhs)
+{
+	struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr;
+	struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs;
+	struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr;
+	struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs;
+
+	switch (srcaddr->sa_family) {
+	case AF_UNSPEC:
+		switch (rhs->sa_family) {
+		case AF_UNSPEC:
+			return 0;
+		case AF_INET:
+		case AF_INET6:
+			return 1;
+		default:
+			return -1;
+		}
+	case AF_INET: {
+		switch (rhs->sa_family) {
+		case AF_UNSPEC:
+			return -1;
+		case AF_INET:
+			return memcmp(saddr4, vaddr4,
+				      sizeof(struct sockaddr_in));
+		case AF_INET6:
+			return 1;
+		default:
+			return -1;
+		}
+	}
+	case AF_INET6: {
+		switch (rhs->sa_family) {
+		case AF_UNSPEC:
+		case AF_INET:
+			return -1;
+		case AF_INET6:
+			return memcmp(saddr6,
+				      vaddr6,
+				      sizeof(struct sockaddr_in6));
+		default:
+			return -1;
+		}
+	}
+	default:
+		return -1; /* don't expect to be here */
+	}
+}
+
+/*
+ * Returns true if srcaddr isn't specified and rhs isn't specified, or
+ * if srcaddr is specified and matches the IP address of the rhs argument
+ */
+bool
+cifs_match_ipaddr(struct sockaddr *srcaddr, struct sockaddr *rhs)
+{
+	switch (srcaddr->sa_family) {
+	case AF_UNSPEC:
+		return (rhs->sa_family == AF_UNSPEC);
+	case AF_INET: {
+		struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr;
+		struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs;
+		return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr);
+	}
+	case AF_INET6: {
+		struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr;
+		struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs;
+		return (ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr)
+			&& saddr6->sin6_scope_id == vaddr6->sin6_scope_id);
+	}
+	default:
+		WARN_ON(1);
+		return false; /* don't expect to be here */
+	}
+}
+
+/*
+ * If no port is specified in addr structure, we try to match with 445 port
+ * and if it fails - with 139 ports. It should be called only if address
+ * families of server and addr are equal.
+ */
+static bool
+match_port(struct TCP_Server_Info *server, struct sockaddr *addr)
+{
+	__be16 port, *sport;
+
+	/* SMBDirect manages its own ports, don't match it here */
+	if (server->rdma)
+		return true;
+
+	switch (addr->sa_family) {
+	case AF_INET:
+		sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port;
+		port = ((struct sockaddr_in *) addr)->sin_port;
+		break;
+	case AF_INET6:
+		sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port;
+		port = ((struct sockaddr_in6 *) addr)->sin6_port;
+		break;
+	default:
+		WARN_ON(1);
+		return false;
+	}
+
+	if (!port) {
+		port = htons(CIFS_PORT);
+		if (port == *sport)
+			return true;
+
+		port = htons(RFC1001_PORT);
+	}
+
+	return port == *sport;
+}
+
+static bool match_server_address(struct TCP_Server_Info *server, struct sockaddr *addr)
+{
+	if (!cifs_match_ipaddr(addr, (struct sockaddr *)&server->dstaddr))
+		return false;
+
+	return true;
+}
+
+static bool
+match_security(struct TCP_Server_Info *server, struct smb3_fs_context *ctx)
+{
+	/*
+	 * The select_sectype function should either return the ctx->sectype
+	 * that was specified, or "Unspecified" if that sectype was not
+	 * compatible with the given NEGOTIATE request.
+	 */
+	if (server->ops->select_sectype(server, ctx->sectype)
+	     == Unspecified)
+		return false;
+
+	/*
+	 * Now check if signing mode is acceptable. No need to check
+	 * global_secflags at this point since if MUST_SIGN is set then
+	 * the server->sign had better be too.
+	 */
+	if (ctx->sign && !server->sign)
+		return false;
+
+	return true;
+}
+
+/* this function must be called with srv_lock held */
+static int match_server(struct TCP_Server_Info *server,
+			struct smb3_fs_context *ctx,
+			bool match_super)
+{
+	struct sockaddr *addr = (struct sockaddr *)&ctx->dstaddr;
+
+	lockdep_assert_held(&server->srv_lock);
+
+	if (ctx->nosharesock)
+		return 0;
+
+	/* this server does not share socket */
+	if (server->nosharesock)
+		return 0;
+
+	/* If multidialect negotiation see if existing sessions match one */
+	if (strcmp(ctx->vals->version_string, SMB3ANY_VERSION_STRING) == 0) {
+		if (server->vals->protocol_id < SMB30_PROT_ID)
+			return 0;
+	} else if (strcmp(ctx->vals->version_string,
+		   SMBDEFAULT_VERSION_STRING) == 0) {
+		if (server->vals->protocol_id < SMB21_PROT_ID)
+			return 0;
+	} else if ((server->vals != ctx->vals) || (server->ops != ctx->ops))
+		return 0;
+
+	if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns))
+		return 0;
+
+	if (!cifs_match_ipaddr((struct sockaddr *)&ctx->srcaddr,
+			       (struct sockaddr *)&server->srcaddr))
+		return 0;
+	/*
+	 * When matching cifs.ko superblocks (@match_super == true), we can't
+	 * really match either @server->leaf_fullpath or @server->dstaddr
+	 * directly since this @server might belong to a completely different
+	 * server -- in case of domain-based DFS referrals or DFS links -- as
+	 * provided earlier by mount(2) through 'source' and 'ip' options.
+	 *
+	 * Otherwise, match the DFS referral in @server->leaf_fullpath or the
+	 * destination address in @server->dstaddr.
+	 *
+	 * When using 'nodfs' mount option, we avoid sharing it with DFS
+	 * connections as they might failover.
+	 */
+	if (!match_super) {
+		if (!ctx->nodfs) {
+			if (server->leaf_fullpath) {
+				if (!ctx->leaf_fullpath ||
+				    strcasecmp(server->leaf_fullpath,
+					       ctx->leaf_fullpath))
+					return 0;
+			} else if (ctx->leaf_fullpath) {
+				return 0;
+			}
+		} else if (server->leaf_fullpath) {
+			return 0;
+		}
+	}
+
+	/*
+	 * Match for a regular connection (address/hostname/port) which has no
+	 * DFS referrals set.
+	 */
+	if (!server->leaf_fullpath &&
+	    (strcasecmp(server->hostname, ctx->server_hostname) ||
+	     !match_server_address(server, addr) ||
+	     !match_port(server, addr)))
+		return 0;
+
+	if (!match_security(server, ctx))
+		return 0;
+
+	if (server->echo_interval != ctx->echo_interval * HZ)
+		return 0;
+
+	if (server->rdma != ctx->rdma)
+		return 0;
+
+	if (server->ignore_signature != ctx->ignore_signature)
+		return 0;
+
+	if (server->min_offload != ctx->min_offload)
+		return 0;
+
+	return 1;
+}
+
+struct TCP_Server_Info *
+cifs_find_tcp_session(struct smb3_fs_context *ctx)
+{
+	struct TCP_Server_Info *server;
+
+	spin_lock(&cifs_tcp_ses_lock);
+	list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
+		spin_lock(&server->srv_lock);
+		/*
+		 * Skip ses channels since they're only handled in lower layers
+		 * (e.g. cifs_send_recv).
+		 */
+		if (SERVER_IS_CHAN(server) ||
+		    !match_server(server, ctx, false)) {
+			spin_unlock(&server->srv_lock);
+			continue;
+		}
+		spin_unlock(&server->srv_lock);
+
+		++server->srv_count;
+		spin_unlock(&cifs_tcp_ses_lock);
+		cifs_dbg(FYI, "Existing tcp session with server found\n");
+		return server;
+	}
+	spin_unlock(&cifs_tcp_ses_lock);
+	return NULL;
+}
+
+void
+cifs_put_tcp_session(struct TCP_Server_Info *server, int from_reconnect)
+{
+	struct task_struct *task;
+
+	spin_lock(&cifs_tcp_ses_lock);
+	if (--server->srv_count > 0) {
+		spin_unlock(&cifs_tcp_ses_lock);
+		return;
+	}
+
+	/* srv_count can never go negative */
+	WARN_ON(server->srv_count < 0);
+
+	put_net(cifs_net_ns(server));
+
+	list_del_init(&server->tcp_ses_list);
+	spin_unlock(&cifs_tcp_ses_lock);
+
+	cancel_delayed_work_sync(&server->echo);
+
+	if (from_reconnect)
+		/*
+		 * Avoid deadlock here: reconnect work calls
+		 * cifs_put_tcp_session() at its end. Need to be sure
+		 * that reconnect work does nothing with server pointer after
+		 * that step.
+		 */
+		cancel_delayed_work(&server->reconnect);
+	else
+		cancel_delayed_work_sync(&server->reconnect);
+
+	/* For secondary channels, we pick up ref-count on the primary server */
+	if (SERVER_IS_CHAN(server))
+		cifs_put_tcp_session(server->primary_server, from_reconnect);
+
+	spin_lock(&server->srv_lock);
+	server->tcpStatus = CifsExiting;
+	spin_unlock(&server->srv_lock);
+
+	cifs_crypto_secmech_release(server);
+
+	kfree_sensitive(server->session_key.response);
+	server->session_key.response = NULL;
+	server->session_key.len = 0;
+	kfree(server->hostname);
+	server->hostname = NULL;
+
+	task = xchg(&server->tsk, NULL);
+	if (task)
+		send_sig(SIGKILL, task, 1);
+}
+
+struct TCP_Server_Info *
+cifs_get_tcp_session(struct smb3_fs_context *ctx,
+		     struct TCP_Server_Info *primary_server)
+{
+	struct TCP_Server_Info *tcp_ses = NULL;
+	int rc;
+
+	cifs_dbg(FYI, "UNC: %s\n", ctx->UNC);
+
+	/* see if we already have a matching tcp_ses */
+	tcp_ses = cifs_find_tcp_session(ctx);
+	if (tcp_ses)
+		return tcp_ses;
+
+	tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
+	if (!tcp_ses) {
+		rc = -ENOMEM;
+		goto out_err;
+	}
+
+	tcp_ses->hostname = kstrdup(ctx->server_hostname, GFP_KERNEL);
+	if (!tcp_ses->hostname) {
+		rc = -ENOMEM;
+		goto out_err;
+	}
+
+	if (ctx->leaf_fullpath) {
+		tcp_ses->leaf_fullpath = kstrdup(ctx->leaf_fullpath, GFP_KERNEL);
+		if (!tcp_ses->leaf_fullpath) {
+			rc = -ENOMEM;
+			goto out_err;
+		}
+	}
+
+	if (ctx->nosharesock)
+		tcp_ses->nosharesock = true;
+
+	tcp_ses->ops = ctx->ops;
+	tcp_ses->vals = ctx->vals;
+	cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns));
+
+	tcp_ses->conn_id = atomic_inc_return(&tcpSesNextId);
+	tcp_ses->noblockcnt = ctx->rootfs;
+	tcp_ses->noblocksnd = ctx->noblocksnd || ctx->rootfs;
+	tcp_ses->noautotune = ctx->noautotune;
+	tcp_ses->tcp_nodelay = ctx->sockopt_tcp_nodelay;
+	tcp_ses->rdma = ctx->rdma;
+	tcp_ses->in_flight = 0;
+	tcp_ses->max_in_flight = 0;
+	tcp_ses->credits = 1;
+	if (primary_server) {
+		spin_lock(&cifs_tcp_ses_lock);
+		++primary_server->srv_count;
+		spin_unlock(&cifs_tcp_ses_lock);
+		tcp_ses->primary_server = primary_server;
+	}
+	init_waitqueue_head(&tcp_ses->response_q);
+	init_waitqueue_head(&tcp_ses->request_q);
+	INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
+	mutex_init(&tcp_ses->_srv_mutex);
+	memcpy(tcp_ses->workstation_RFC1001_name,
+		ctx->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
+	memcpy(tcp_ses->server_RFC1001_name,
+		ctx->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
+	tcp_ses->session_estab = false;
+	tcp_ses->sequence_number = 0;
+	tcp_ses->channel_sequence_num = 0; /* only tracked for primary channel */
+	tcp_ses->reconnect_instance = 1;
+	tcp_ses->lstrp = jiffies;
+	tcp_ses->compress_algorithm = cpu_to_le16(ctx->compression);
+	spin_lock_init(&tcp_ses->req_lock);
+	spin_lock_init(&tcp_ses->srv_lock);
+	spin_lock_init(&tcp_ses->mid_lock);
+	INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
+	INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
+	INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);
+	INIT_DELAYED_WORK(&tcp_ses->reconnect, smb2_reconnect_server);
+	mutex_init(&tcp_ses->reconnect_mutex);
+#ifdef CONFIG_CIFS_DFS_UPCALL
+	mutex_init(&tcp_ses->refpath_lock);
+#endif
+	memcpy(&tcp_ses->srcaddr, &ctx->srcaddr,
+	       sizeof(tcp_ses->srcaddr));
+	memcpy(&tcp_ses->dstaddr, &ctx->dstaddr,
+		sizeof(tcp_ses->dstaddr));
+	if (ctx->use_client_guid)
+		memcpy(tcp_ses->client_guid, ctx->client_guid,
+		       SMB2_CLIENT_GUID_SIZE);
+	else
+		generate_random_uuid(tcp_ses->client_guid);
+	/*
+	 * at this point we are the only ones with the pointer
+	 * to the struct since the kernel thread not created yet
+	 * no need to spinlock this init of tcpStatus or srv_count
+	 */
+	tcp_ses->tcpStatus = CifsNew;
+	++tcp_ses->srv_count;
+
+	if (ctx->echo_interval >= SMB_ECHO_INTERVAL_MIN &&
+		ctx->echo_interval <= SMB_ECHO_INTERVAL_MAX)
+		tcp_ses->echo_interval = ctx->echo_interval * HZ;
+	else
+		tcp_ses->echo_interval = SMB_ECHO_INTERVAL_DEFAULT * HZ;
+	if (tcp_ses->rdma) {
+#ifndef CONFIG_CIFS_SMB_DIRECT
+		cifs_dbg(VFS, "CONFIG_CIFS_SMB_DIRECT is not enabled\n");
+		rc = -ENOENT;
+		goto out_err_crypto_release;
+#endif
+		tcp_ses->smbd_conn = smbd_get_connection(
+			tcp_ses, (struct sockaddr *)&ctx->dstaddr);
+		if (tcp_ses->smbd_conn) {
+			cifs_dbg(VFS, "RDMA transport established\n");
+			rc = 0;
+			goto smbd_connected;
+		} else {
+			rc = -ENOENT;
+			goto out_err_crypto_release;
+		}
+	}
+	rc = ip_connect(tcp_ses);
+	if (rc < 0) {
+		cifs_dbg(VFS, "Error connecting to socket. Aborting operation.\n");
+		goto out_err_crypto_release;
+	}
+smbd_connected:
+	/*
+	 * since we're in a cifs function already, we know that
+	 * this will succeed. No need for try_module_get().
+	 */
+	__module_get(THIS_MODULE);
+	tcp_ses->tsk = kthread_run(cifs_demultiplex_thread,
+				  tcp_ses, "cifsd");
+	if (IS_ERR(tcp_ses->tsk)) {
+		rc = PTR_ERR(tcp_ses->tsk);
+		cifs_dbg(VFS, "error %d create cifsd thread\n", rc);
+		module_put(THIS_MODULE);
+		goto out_err_crypto_release;
+	}
+	tcp_ses->min_offload = ctx->min_offload;
+	/*
+	 * at this point we are the only ones with the pointer
+	 * to the struct since the kernel thread not created yet
+	 * no need to spinlock this update of tcpStatus
+	 */
+	spin_lock(&tcp_ses->srv_lock);
+	tcp_ses->tcpStatus = CifsNeedNegotiate;
+	spin_unlock(&tcp_ses->srv_lock);
+
+	if ((ctx->max_credits < 20) || (ctx->max_credits > 60000))
+		tcp_ses->max_credits = SMB2_MAX_CREDITS_AVAILABLE;
+	else
+		tcp_ses->max_credits = ctx->max_credits;
+
+	tcp_ses->nr_targets = 1;
+	tcp_ses->ignore_signature = ctx->ignore_signature;
+	/* thread spawned, put it on the list */
+	spin_lock(&cifs_tcp_ses_lock);
+	list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
+	spin_unlock(&cifs_tcp_ses_lock);
+
+	/* queue echo request delayed work */
+	queue_delayed_work(cifsiod_wq, &tcp_ses->echo, tcp_ses->echo_interval);
+
+	return tcp_ses;
+
+out_err_crypto_release:
+	cifs_crypto_secmech_release(tcp_ses);
+
+	put_net(cifs_net_ns(tcp_ses));
+
+out_err:
+	if (tcp_ses) {
+		if (SERVER_IS_CHAN(tcp_ses))
+			cifs_put_tcp_session(tcp_ses->primary_server, false);
+		kfree(tcp_ses->hostname);
+		kfree(tcp_ses->leaf_fullpath);
+		if (tcp_ses->ssocket)
+			sock_release(tcp_ses->ssocket);
+		kfree(tcp_ses);
+	}
+	return ERR_PTR(rc);
+}
+
+/* this function must be called with ses_lock and chan_lock held */
+static int match_session(struct cifs_ses *ses, struct smb3_fs_context *ctx)
+{
+	if (ctx->sectype != Unspecified &&
+	    ctx->sectype != ses->sectype)
+		return 0;
+
+	/*
+	 * If an existing session is limited to less channels than
+	 * requested, it should not be reused
+	 */
+	if (ses->chan_max < ctx->max_channels)
+		return 0;
+
+	switch (ses->sectype) {
+	case Kerberos:
+		if (!uid_eq(ctx->cred_uid, ses->cred_uid))
+			return 0;
+		break;
+	default:
+		/* NULL username means anonymous session */
+		if (ses->user_name == NULL) {
+			if (!ctx->nullauth)
+				return 0;
+			break;
+		}
+
+		/* anything else takes username/password */
+		if (strncmp(ses->user_name,
+			    ctx->username ? ctx->username : "",
+			    CIFS_MAX_USERNAME_LEN))
+			return 0;
+		if ((ctx->username && strlen(ctx->username) != 0) &&
+		    ses->password != NULL &&
+		    strncmp(ses->password,
+			    ctx->password ? ctx->password : "",
+			    CIFS_MAX_PASSWORD_LEN))
+			return 0;
+	}
+
+	if (strcmp(ctx->local_nls->charset, ses->local_nls->charset))
+		return 0;
+
+	return 1;
+}
+
+/**
+ * cifs_setup_ipc - helper to setup the IPC tcon for the session
+ * @ses: smb session to issue the request on
+ * @ctx: the superblock configuration context to use for building the
+ *       new tree connection for the IPC (interprocess communication RPC)
+ *
+ * A new IPC connection is made and stored in the session
+ * tcon_ipc. The IPC tcon has the same lifetime as the session.
+ */
+static int
+cifs_setup_ipc(struct cifs_ses *ses, struct smb3_fs_context *ctx)
+{
+	int rc = 0, xid;
+	struct cifs_tcon *tcon;
+	char unc[SERVER_NAME_LENGTH + sizeof("//x/IPC$")] = {0};
+	bool seal = false;
+	struct TCP_Server_Info *server = ses->server;
+
+	/*
+	 * If the mount request that resulted in the creation of the
+	 * session requires encryption, force IPC to be encrypted too.
+	 */
+	if (ctx->seal) {
+		if (server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION)
+			seal = true;
+		else {
+			cifs_server_dbg(VFS,
+				 "IPC: server doesn't support encryption\n");
+			return -EOPNOTSUPP;
+		}
+	}
+
+	/* no need to setup directory caching on IPC share, so pass in false */
+	tcon = tcon_info_alloc(false);
+	if (tcon == NULL)
+		return -ENOMEM;
+
+	spin_lock(&server->srv_lock);
+	scnprintf(unc, sizeof(unc), "\\\\%s\\IPC$", server->hostname);
+	spin_unlock(&server->srv_lock);
+
+	xid = get_xid();
+	tcon->ses = ses;
+	tcon->ipc = true;
+	tcon->seal = seal;
+	rc = server->ops->tree_connect(xid, ses, unc, tcon, ctx->local_nls);
+	free_xid(xid);
+
+	if (rc) {
+		cifs_server_dbg(VFS, "failed to connect to IPC (rc=%d)\n", rc);
+		tconInfoFree(tcon);
+		goto out;
+	}
+
+	cifs_dbg(FYI, "IPC tcon rc=%d ipc tid=0x%x\n", rc, tcon->tid);
+
+	spin_lock(&tcon->tc_lock);
+	tcon->status = TID_GOOD;
+	spin_unlock(&tcon->tc_lock);
+	ses->tcon_ipc = tcon;
+out:
+	return rc;
+}
+
+/**
+ * cifs_free_ipc - helper to release the session IPC tcon
+ * @ses: smb session to unmount the IPC from
+ *
+ * Needs to be called everytime a session is destroyed.
+ *
+ * On session close, the IPC is closed and the server must release all tcons of the session.
+ * No need to send a tree disconnect here.
+ *
+ * Besides, it will make the server to not close durable and resilient files on session close, as
+ * specified in MS-SMB2 3.3.5.6 Receiving an SMB2 LOGOFF Request.
+ */
+static int
+cifs_free_ipc(struct cifs_ses *ses)
+{
+	struct cifs_tcon *tcon = ses->tcon_ipc;
+
+	if (tcon == NULL)
+		return 0;
+
+	tconInfoFree(tcon);
+	ses->tcon_ipc = NULL;
+	return 0;
+}
+
+static struct cifs_ses *
+cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb3_fs_context *ctx)
+{
+	struct cifs_ses *ses, *ret = NULL;
+
+	spin_lock(&cifs_tcp_ses_lock);
+	list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
+		spin_lock(&ses->ses_lock);
+		if (ses->ses_status == SES_EXITING) {
+			spin_unlock(&ses->ses_lock);
+			continue;
+		}
+		spin_lock(&ses->chan_lock);
+		if (match_session(ses, ctx)) {
+			spin_unlock(&ses->chan_lock);
+			spin_unlock(&ses->ses_lock);
+			ret = ses;
+			break;
+		}
+		spin_unlock(&ses->chan_lock);
+		spin_unlock(&ses->ses_lock);
+	}
+	if (ret)
+		cifs_smb_ses_inc_refcount(ret);
+	spin_unlock(&cifs_tcp_ses_lock);
+	return ret;
+}
+
+void __cifs_put_smb_ses(struct cifs_ses *ses)
+{
+	unsigned int rc, xid;
+	unsigned int chan_count;
+	struct TCP_Server_Info *server = ses->server;
+
+	spin_lock(&ses->ses_lock);
+	if (ses->ses_status == SES_EXITING) {
+		spin_unlock(&ses->ses_lock);
+		return;
+	}
+	spin_unlock(&ses->ses_lock);
+
+	cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count);
+	cifs_dbg(FYI,
+		 "%s: ses ipc: %s\n", __func__, ses->tcon_ipc ? ses->tcon_ipc->tree_name : "NONE");
+
+	spin_lock(&cifs_tcp_ses_lock);
+	if (--ses->ses_count > 0) {
+		spin_unlock(&cifs_tcp_ses_lock);
+		return;
+	}
+	spin_lock(&ses->ses_lock);
+	if (ses->ses_status == SES_GOOD)
+		ses->ses_status = SES_EXITING;
+	spin_unlock(&ses->ses_lock);
+	spin_unlock(&cifs_tcp_ses_lock);
+
+	/* ses_count can never go negative */
+	WARN_ON(ses->ses_count < 0);
+
+	spin_lock(&ses->ses_lock);
+	if (ses->ses_status == SES_EXITING && server->ops->logoff) {
+		spin_unlock(&ses->ses_lock);
+		cifs_free_ipc(ses);
+		xid = get_xid();
+		rc = server->ops->logoff(xid, ses);
+		if (rc)
+			cifs_server_dbg(VFS, "%s: Session Logoff failure rc=%d\n",
+				__func__, rc);
+		_free_xid(xid);
+	} else {
+		spin_unlock(&ses->ses_lock);
+		cifs_free_ipc(ses);
+	}
+
+	spin_lock(&cifs_tcp_ses_lock);
+	list_del_init(&ses->smb_ses_list);
+	spin_unlock(&cifs_tcp_ses_lock);
+
+	chan_count = ses->chan_count;
+
+	/* close any extra channels */
+	if (chan_count > 1) {
+		int i;
+
+		for (i = 1; i < chan_count; i++) {
+			if (ses->chans[i].iface) {
+				kref_put(&ses->chans[i].iface->refcount, release_iface);
+				ses->chans[i].iface = NULL;
+			}
+			cifs_put_tcp_session(ses->chans[i].server, 0);
+			ses->chans[i].server = NULL;
+		}
+	}
+
+	/* we now account for primary channel in iface->refcount */
+	if (ses->chans[0].iface) {
+		kref_put(&ses->chans[0].iface->refcount, release_iface);
+		ses->chans[0].server = NULL;
+	}
+
+	sesInfoFree(ses);
+	cifs_put_tcp_session(server, 0);
+}
+
+#ifdef CONFIG_KEYS
+
+/* strlen("cifs:a:") + CIFS_MAX_DOMAINNAME_LEN + 1 */
+#define CIFSCREDS_DESC_SIZE (7 + CIFS_MAX_DOMAINNAME_LEN + 1)
+
+/* Populate username and pw fields from keyring if possible */
+static int
+cifs_set_cifscreds(struct smb3_fs_context *ctx, struct cifs_ses *ses)
+{
+	int rc = 0;
+	int is_domain = 0;
+	const char *delim, *payload;
+	char *desc;
+	ssize_t len;
+	struct key *key;
+	struct TCP_Server_Info *server = ses->server;
+	struct sockaddr_in *sa;
+	struct sockaddr_in6 *sa6;
+	const struct user_key_payload *upayload;
+
+	desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL);
+	if (!desc)
+		return -ENOMEM;
+
+	/* try to find an address key first */
+	switch (server->dstaddr.ss_family) {
+	case AF_INET:
+		sa = (struct sockaddr_in *)&server->dstaddr;
+		sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr);
+		break;
+	case AF_INET6:
+		sa6 = (struct sockaddr_in6 *)&server->dstaddr;
+		sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr);
+		break;
+	default:
+		cifs_dbg(FYI, "Bad ss_family (%hu)\n",
+			 server->dstaddr.ss_family);
+		rc = -EINVAL;
+		goto out_err;
+	}
+
+	cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc);
+	key = request_key(&key_type_logon, desc, "");
+	if (IS_ERR(key)) {
+		if (!ses->domainName) {
+			cifs_dbg(FYI, "domainName is NULL\n");
+			rc = PTR_ERR(key);
+			goto out_err;
+		}
+
+		/* didn't work, try to find a domain key */
+		sprintf(desc, "cifs:d:%s", ses->domainName);
+		cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc);
+		key = request_key(&key_type_logon, desc, "");
+		if (IS_ERR(key)) {
+			rc = PTR_ERR(key);
+			goto out_err;
+		}
+		is_domain = 1;
+	}
+
+	down_read(&key->sem);
+	upayload = user_key_payload_locked(key);
+	if (IS_ERR_OR_NULL(upayload)) {
+		rc = upayload ? PTR_ERR(upayload) : -EINVAL;
+		goto out_key_put;
+	}
+
+	/* find first : in payload */
+	payload = upayload->data;
+	delim = strnchr(payload, upayload->datalen, ':');
+	cifs_dbg(FYI, "payload=%s\n", payload);
+	if (!delim) {
+		cifs_dbg(FYI, "Unable to find ':' in payload (datalen=%d)\n",
+			 upayload->datalen);
+		rc = -EINVAL;
+		goto out_key_put;
+	}
+
+	len = delim - payload;
+	if (len > CIFS_MAX_USERNAME_LEN || len <= 0) {
+		cifs_dbg(FYI, "Bad value from username search (len=%zd)\n",
+			 len);
+		rc = -EINVAL;
+		goto out_key_put;
+	}
+
+	ctx->username = kstrndup(payload, len, GFP_KERNEL);
+	if (!ctx->username) {
+		cifs_dbg(FYI, "Unable to allocate %zd bytes for username\n",
+			 len);
+		rc = -ENOMEM;
+		goto out_key_put;
+	}
+	cifs_dbg(FYI, "%s: username=%s\n", __func__, ctx->username);
+
+	len = key->datalen - (len + 1);
+	if (len > CIFS_MAX_PASSWORD_LEN || len <= 0) {
+		cifs_dbg(FYI, "Bad len for password search (len=%zd)\n", len);
+		rc = -EINVAL;
+		kfree(ctx->username);
+		ctx->username = NULL;
+		goto out_key_put;
+	}
+
+	++delim;
+	ctx->password = kstrndup(delim, len, GFP_KERNEL);
+	if (!ctx->password) {
+		cifs_dbg(FYI, "Unable to allocate %zd bytes for password\n",
+			 len);
+		rc = -ENOMEM;
+		kfree(ctx->username);
+		ctx->username = NULL;
+		goto out_key_put;
+	}
+
+	/*
+	 * If we have a domain key then we must set the domainName in the
+	 * for the request.
+	 */
+	if (is_domain && ses->domainName) {
+		ctx->domainname = kstrdup(ses->domainName, GFP_KERNEL);
+		if (!ctx->domainname) {
+			cifs_dbg(FYI, "Unable to allocate %zd bytes for domain\n",
+				 len);
+			rc = -ENOMEM;
+			kfree(ctx->username);
+			ctx->username = NULL;
+			kfree_sensitive(ctx->password);
+			ctx->password = NULL;
+			goto out_key_put;
+		}
+	}
+
+	strscpy(ctx->workstation_name, ses->workstation_name, sizeof(ctx->workstation_name));
+
+out_key_put:
+	up_read(&key->sem);
+	key_put(key);
+out_err:
+	kfree(desc);
+	cifs_dbg(FYI, "%s: returning %d\n", __func__, rc);
+	return rc;
+}
+#else /* ! CONFIG_KEYS */
+static inline int
+cifs_set_cifscreds(struct smb3_fs_context *ctx __attribute__((unused)),
+		   struct cifs_ses *ses __attribute__((unused)))
+{
+	return -ENOSYS;
+}
+#endif /* CONFIG_KEYS */
+
+/**
+ * cifs_get_smb_ses - get a session matching @ctx data from @server
+ * @server: server to setup the session to
+ * @ctx: superblock configuration context to use to setup the session
+ *
+ * This function assumes it is being called from cifs_mount() where we
+ * already got a server reference (server refcount +1). See
+ * cifs_get_tcon() for refcount explanations.
+ */
+struct cifs_ses *
+cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb3_fs_context *ctx)
+{
+	int rc = 0;
+	unsigned int xid;
+	struct cifs_ses *ses;
+	struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
+	struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
+
+	xid = get_xid();
+
+	ses = cifs_find_smb_ses(server, ctx);
+	if (ses) {
+		cifs_dbg(FYI, "Existing smb sess found (status=%d)\n",
+			 ses->ses_status);
+
+		spin_lock(&ses->chan_lock);
+		if (cifs_chan_needs_reconnect(ses, server)) {
+			spin_unlock(&ses->chan_lock);
+			cifs_dbg(FYI, "Session needs reconnect\n");
+
+			mutex_lock(&ses->session_mutex);
+			rc = cifs_negotiate_protocol(xid, ses, server);
+			if (rc) {
+				mutex_unlock(&ses->session_mutex);
+				/* problem -- put our ses reference */
+				cifs_put_smb_ses(ses);
+				free_xid(xid);
+				return ERR_PTR(rc);
+			}
+
+			rc = cifs_setup_session(xid, ses, server,
+						ctx->local_nls);
+			if (rc) {
+				mutex_unlock(&ses->session_mutex);
+				/* problem -- put our reference */
+				cifs_put_smb_ses(ses);
+				free_xid(xid);
+				return ERR_PTR(rc);
+			}
+			mutex_unlock(&ses->session_mutex);
+
+			spin_lock(&ses->chan_lock);
+		}
+		spin_unlock(&ses->chan_lock);
+
+		/* existing SMB ses has a server reference already */
+		cifs_put_tcp_session(server, 0);
+		free_xid(xid);
+		return ses;
+	}
+
+	rc = -ENOMEM;
+
+	cifs_dbg(FYI, "Existing smb sess not found\n");
+	ses = sesInfoAlloc();
+	if (ses == NULL)
+		goto get_ses_fail;
+
+	/* new SMB session uses our server ref */
+	ses->server = server;
+	if (server->dstaddr.ss_family == AF_INET6)
+		sprintf(ses->ip_addr, "%pI6", &addr6->sin6_addr);
+	else
+		sprintf(ses->ip_addr, "%pI4", &addr->sin_addr);
+
+	if (ctx->username) {
+		ses->user_name = kstrdup(ctx->username, GFP_KERNEL);
+		if (!ses->user_name)
+			goto get_ses_fail;
+	}
+
+	/* ctx->password freed at unmount */
+	if (ctx->password) {
+		ses->password = kstrdup(ctx->password, GFP_KERNEL);
+		if (!ses->password)
+			goto get_ses_fail;
+	}
+	if (ctx->domainname) {
+		ses->domainName = kstrdup(ctx->domainname, GFP_KERNEL);
+		if (!ses->domainName)
+			goto get_ses_fail;
+	}
+
+	strscpy(ses->workstation_name, ctx->workstation_name, sizeof(ses->workstation_name));
+
+	if (ctx->domainauto)
+		ses->domainAuto = ctx->domainauto;
+	ses->cred_uid = ctx->cred_uid;
+	ses->linux_uid = ctx->linux_uid;
+
+	ses->sectype = ctx->sectype;
+	ses->sign = ctx->sign;
+	ses->local_nls = load_nls(ctx->local_nls->charset);
+
+	/* add server as first channel */
+	spin_lock(&ses->chan_lock);
+	ses->chans[0].server = server;
+	ses->chan_count = 1;
+	ses->chan_max = ctx->multichannel ? ctx->max_channels:1;
+	ses->chans_need_reconnect = 1;
+	spin_unlock(&ses->chan_lock);
+
+	mutex_lock(&ses->session_mutex);
+	rc = cifs_negotiate_protocol(xid, ses, server);
+	if (!rc)
+		rc = cifs_setup_session(xid, ses, server, ctx->local_nls);
+	mutex_unlock(&ses->session_mutex);
+
+	/* each channel uses a different signing key */
+	spin_lock(&ses->chan_lock);
+	memcpy(ses->chans[0].signkey, ses->smb3signingkey,
+	       sizeof(ses->smb3signingkey));
+	spin_unlock(&ses->chan_lock);
+
+	if (rc)
+		goto get_ses_fail;
+
+	/*
+	 * success, put it on the list and add it as first channel
+	 * note: the session becomes active soon after this. So you'll
+	 * need to lock before changing something in the session.
+	 */
+	spin_lock(&cifs_tcp_ses_lock);
+	ses->dfs_root_ses = ctx->dfs_root_ses;
+	if (ses->dfs_root_ses)
+		ses->dfs_root_ses->ses_count++;
+	list_add(&ses->smb_ses_list, &server->smb_ses_list);
+	spin_unlock(&cifs_tcp_ses_lock);
+
+	cifs_setup_ipc(ses, ctx);
+
+	free_xid(xid);
+
+	return ses;
+
+get_ses_fail:
+	sesInfoFree(ses);
+	free_xid(xid);
+	return ERR_PTR(rc);
+}
+
+/* this function must be called with tc_lock held */
+static int match_tcon(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
+{
+	struct TCP_Server_Info *server = tcon->ses->server;
+
+	if (tcon->status == TID_EXITING)
+		return 0;
+
+	if (tcon->origin_fullpath) {
+		if (!ctx->source ||
+		    !dfs_src_pathname_equal(ctx->source,
+					    tcon->origin_fullpath))
+			return 0;
+	} else if (!server->leaf_fullpath &&
+		   strncmp(tcon->tree_name, ctx->UNC, MAX_TREE_SIZE)) {
+		return 0;
+	}
+	if (tcon->seal != ctx->seal)
+		return 0;
+	if (tcon->snapshot_time != ctx->snapshot_time)
+		return 0;
+	if (tcon->handle_timeout != ctx->handle_timeout)
+		return 0;
+	if (tcon->no_lease != ctx->no_lease)
+		return 0;
+	if (tcon->nodelete != ctx->nodelete)
+		return 0;
+	return 1;
+}
+
+static struct cifs_tcon *
+cifs_find_tcon(struct cifs_ses *ses, struct smb3_fs_context *ctx)
+{
+	struct cifs_tcon *tcon;
+
+	spin_lock(&cifs_tcp_ses_lock);
+	list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
+		spin_lock(&tcon->tc_lock);
+		if (!match_tcon(tcon, ctx)) {
+			spin_unlock(&tcon->tc_lock);
+			continue;
+		}
+		++tcon->tc_count;
+		spin_unlock(&tcon->tc_lock);
+		spin_unlock(&cifs_tcp_ses_lock);
+		return tcon;
+	}
+	spin_unlock(&cifs_tcp_ses_lock);
+	return NULL;
+}
+
+void
+cifs_put_tcon(struct cifs_tcon *tcon)
+{
+	unsigned int xid;
+	struct cifs_ses *ses;
+
+	/*
+	 * IPC tcon share the lifetime of their session and are
+	 * destroyed in the session put function
+	 */
+	if (tcon == NULL || tcon->ipc)
+		return;
+
+	ses = tcon->ses;
+	cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count);
+	spin_lock(&cifs_tcp_ses_lock);
+	spin_lock(&tcon->tc_lock);
+	if (--tcon->tc_count > 0) {
+		spin_unlock(&tcon->tc_lock);
+		spin_unlock(&cifs_tcp_ses_lock);
+		return;
+	}
+
+	/* tc_count can never go negative */
+	WARN_ON(tcon->tc_count < 0);
+
+	list_del_init(&tcon->tcon_list);
+	tcon->status = TID_EXITING;
+	spin_unlock(&tcon->tc_lock);
+	spin_unlock(&cifs_tcp_ses_lock);
+
+	/* cancel polling of interfaces */
+	cancel_delayed_work_sync(&tcon->query_interfaces);
+#ifdef CONFIG_CIFS_DFS_UPCALL
+	cancel_delayed_work_sync(&tcon->dfs_cache_work);
+#endif
+
+	if (tcon->use_witness) {
+		int rc;
+
+		rc = cifs_swn_unregister(tcon);
+		if (rc < 0) {
+			cifs_dbg(VFS, "%s: Failed to unregister for witness notifications: %d\n",
+					__func__, rc);
+		}
+	}
+
+	xid = get_xid();
+	if (ses->server->ops->tree_disconnect)
+		ses->server->ops->tree_disconnect(xid, tcon);
+	_free_xid(xid);
+
+	cifs_fscache_release_super_cookie(tcon);
+	tconInfoFree(tcon);
+	cifs_put_smb_ses(ses);
+}
+
+/**
+ * cifs_get_tcon - get a tcon matching @ctx data from @ses
+ * @ses: smb session to issue the request on
+ * @ctx: the superblock configuration context to use for building the
+ *
+ * - tcon refcount is the number of mount points using the tcon.
+ * - ses refcount is the number of tcon using the session.
+ *
+ * 1. This function assumes it is being called from cifs_mount() where
+ *    we already got a session reference (ses refcount +1).
+ *
+ * 2. Since we're in the context of adding a mount point, the end
+ *    result should be either:
+ *
+ * a) a new tcon already allocated with refcount=1 (1 mount point) and
+ *    its session refcount incremented (1 new tcon). This +1 was
+ *    already done in (1).
+ *
+ * b) an existing tcon with refcount+1 (add a mount point to it) and
+ *    identical ses refcount (no new tcon). Because of (1) we need to
+ *    decrement the ses refcount.
+ */
+static struct cifs_tcon *
+cifs_get_tcon(struct cifs_ses *ses, struct smb3_fs_context *ctx)
+{
+	struct cifs_tcon *tcon;
+	bool nohandlecache;
+	int rc, xid;
+
+	tcon = cifs_find_tcon(ses, ctx);
+	if (tcon) {
+		/*
+		 * tcon has refcount already incremented but we need to
+		 * decrement extra ses reference gotten by caller (case b)
+		 */
+		cifs_dbg(FYI, "Found match on UNC path\n");
+		cifs_put_smb_ses(ses);
+		return tcon;
+	}
+
+	if (!ses->server->ops->tree_connect) {
+		rc = -ENOSYS;
+		goto out_fail;
+	}
+
+	if (ses->server->dialect >= SMB20_PROT_ID &&
+	    (ses->server->capabilities & SMB2_GLOBAL_CAP_DIRECTORY_LEASING))
+		nohandlecache = ctx->nohandlecache;
+	else
+		nohandlecache = true;
+	tcon = tcon_info_alloc(!nohandlecache);
+	if (tcon == NULL) {
+		rc = -ENOMEM;
+		goto out_fail;
+	}
+	tcon->nohandlecache = nohandlecache;
+
+	if (ctx->snapshot_time) {
+		if (ses->server->vals->protocol_id == 0) {
+			cifs_dbg(VFS,
+			     "Use SMB2 or later for snapshot mount option\n");
+			rc = -EOPNOTSUPP;
+			goto out_fail;
+		} else
+			tcon->snapshot_time = ctx->snapshot_time;
+	}
+
+	if (ctx->handle_timeout) {
+		if (ses->server->vals->protocol_id == 0) {
+			cifs_dbg(VFS,
+			     "Use SMB2.1 or later for handle timeout option\n");
+			rc = -EOPNOTSUPP;
+			goto out_fail;
+		} else
+			tcon->handle_timeout = ctx->handle_timeout;
+	}
+
+	tcon->ses = ses;
+	if (ctx->password) {
+		tcon->password = kstrdup(ctx->password, GFP_KERNEL);
+		if (!tcon->password) {
+			rc = -ENOMEM;
+			goto out_fail;
+		}
+	}
+
+	if (ctx->seal) {
+		if (ses->server->vals->protocol_id == 0) {
+			cifs_dbg(VFS,
+				 "SMB3 or later required for encryption\n");
+			rc = -EOPNOTSUPP;
+			goto out_fail;
+		} else if (tcon->ses->server->capabilities &
+					SMB2_GLOBAL_CAP_ENCRYPTION)
+			tcon->seal = true;
+		else {
+			cifs_dbg(VFS, "Encryption is not supported on share\n");
+			rc = -EOPNOTSUPP;
+			goto out_fail;
+		}
+	}
+
+	if (ctx->linux_ext) {
+		if (ses->server->posix_ext_supported) {
+			tcon->posix_extensions = true;
+			pr_warn_once("SMB3.11 POSIX Extensions are experimental\n");
+		} else if ((ses->server->vals->protocol_id == SMB311_PROT_ID) ||
+		    (strcmp(ses->server->vals->version_string,
+		     SMB3ANY_VERSION_STRING) == 0) ||
+		    (strcmp(ses->server->vals->version_string,
+		     SMBDEFAULT_VERSION_STRING) == 0)) {
+			cifs_dbg(VFS, "Server does not support mounting with posix SMB3.11 extensions\n");
+			rc = -EOPNOTSUPP;
+			goto out_fail;
+		} else {
+			cifs_dbg(VFS, "Check vers= mount option. SMB3.11 "
+				"disabled but required for POSIX extensions\n");
+			rc = -EOPNOTSUPP;
+			goto out_fail;
+		}
+	}
+
+	xid = get_xid();
+	rc = ses->server->ops->tree_connect(xid, ses, ctx->UNC, tcon,
+					    ctx->local_nls);
+	free_xid(xid);
+	cifs_dbg(FYI, "Tcon rc = %d\n", rc);
+	if (rc)
+		goto out_fail;
+
+	tcon->use_persistent = false;
+	/* check if SMB2 or later, CIFS does not support persistent handles */
+	if (ctx->persistent) {
+		if (ses->server->vals->protocol_id == 0) {
+			cifs_dbg(VFS,
+			     "SMB3 or later required for persistent handles\n");
+			rc = -EOPNOTSUPP;
+			goto out_fail;
+		} else if (ses->server->capabilities &
+			   SMB2_GLOBAL_CAP_PERSISTENT_HANDLES)
+			tcon->use_persistent = true;
+		else /* persistent handles requested but not supported */ {
+			cifs_dbg(VFS,
+				"Persistent handles not supported on share\n");
+			rc = -EOPNOTSUPP;
+			goto out_fail;
+		}
+	} else if ((tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
+	     && (ses->server->capabilities & SMB2_GLOBAL_CAP_PERSISTENT_HANDLES)
+	     && (ctx->nopersistent == false)) {
+		cifs_dbg(FYI, "enabling persistent handles\n");
+		tcon->use_persistent = true;
+	} else if (ctx->resilient) {
+		if (ses->server->vals->protocol_id == 0) {
+			cifs_dbg(VFS,
+			     "SMB2.1 or later required for resilient handles\n");
+			rc = -EOPNOTSUPP;
+			goto out_fail;
+		}
+		tcon->use_resilient = true;
+	}
+
+	tcon->use_witness = false;
+	if (IS_ENABLED(CONFIG_CIFS_SWN_UPCALL) && ctx->witness) {
+		if (ses->server->vals->protocol_id >= SMB30_PROT_ID) {
+			if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER) {
+				/*
+				 * Set witness in use flag in first place
+				 * to retry registration in the echo task
+				 */
+				tcon->use_witness = true;
+				/* And try to register immediately */
+				rc = cifs_swn_register(tcon);
+				if (rc < 0) {
+					cifs_dbg(VFS, "Failed to register for witness notifications: %d\n", rc);
+					goto out_fail;
+				}
+			} else {
+				/* TODO: try to extend for non-cluster uses (eg multichannel) */
+				cifs_dbg(VFS, "witness requested on mount but no CLUSTER capability on share\n");
+				rc = -EOPNOTSUPP;
+				goto out_fail;
+			}
+		} else {
+			cifs_dbg(VFS, "SMB3 or later required for witness option\n");
+			rc = -EOPNOTSUPP;
+			goto out_fail;
+		}
+	}
+
+	/* If the user really knows what they are doing they can override */
+	if (tcon->share_flags & SMB2_SHAREFLAG_NO_CACHING) {
+		if (ctx->cache_ro)
+			cifs_dbg(VFS, "cache=ro requested on mount but NO_CACHING flag set on share\n");
+		else if (ctx->cache_rw)
+			cifs_dbg(VFS, "cache=singleclient requested on mount but NO_CACHING flag set on share\n");
+	}
+
+	if (ctx->no_lease) {
+		if (ses->server->vals->protocol_id == 0) {
+			cifs_dbg(VFS,
+				"SMB2 or later required for nolease option\n");
+			rc = -EOPNOTSUPP;
+			goto out_fail;
+		} else
+			tcon->no_lease = ctx->no_lease;
+	}
+
+	/*
+	 * We can have only one retry value for a connection to a share so for
+	 * resources mounted more than once to the same server share the last
+	 * value passed in for the retry flag is used.
+	 */
+	tcon->retry = ctx->retry;
+	tcon->nocase = ctx->nocase;
+	tcon->broken_sparse_sup = ctx->no_sparse;
+	tcon->max_cached_dirs = ctx->max_cached_dirs;
+	tcon->nodelete = ctx->nodelete;
+	tcon->local_lease = ctx->local_lease;
+	INIT_LIST_HEAD(&tcon->pending_opens);
+	tcon->status = TID_GOOD;
+
+	INIT_DELAYED_WORK(&tcon->query_interfaces,
+			  smb2_query_server_interfaces);
+	if (ses->server->dialect >= SMB30_PROT_ID &&
+	    (ses->server->capabilities & SMB2_GLOBAL_CAP_MULTI_CHANNEL)) {
+		/* schedule query interfaces poll */
+		queue_delayed_work(cifsiod_wq, &tcon->query_interfaces,
+				   (SMB_INTERFACE_POLL_INTERVAL * HZ));
+	}
+#ifdef CONFIG_CIFS_DFS_UPCALL
+	INIT_DELAYED_WORK(&tcon->dfs_cache_work, dfs_cache_refresh);
+#endif
+	spin_lock(&cifs_tcp_ses_lock);
+	list_add(&tcon->tcon_list, &ses->tcon_list);
+	spin_unlock(&cifs_tcp_ses_lock);
+
+	return tcon;
+
+out_fail:
+	tconInfoFree(tcon);
+	return ERR_PTR(rc);
+}
+
+void
+cifs_put_tlink(struct tcon_link *tlink)
+{
+	if (!tlink || IS_ERR(tlink))
+		return;
+
+	if (!atomic_dec_and_test(&tlink->tl_count) ||
+	    test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) {
+		tlink->tl_time = jiffies;
+		return;
+	}
+
+	if (!IS_ERR(tlink_tcon(tlink)))
+		cifs_put_tcon(tlink_tcon(tlink));
+	kfree(tlink);
+	return;
+}
+
+static int
+compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data)
+{
+	struct cifs_sb_info *old = CIFS_SB(sb);
+	struct cifs_sb_info *new = mnt_data->cifs_sb;
+	unsigned int oldflags = old->mnt_cifs_flags & CIFS_MOUNT_MASK;
+	unsigned int newflags = new->mnt_cifs_flags & CIFS_MOUNT_MASK;
+
+	if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK))
+		return 0;
+
+	if (old->mnt_cifs_serverino_autodisabled)
+		newflags &= ~CIFS_MOUNT_SERVER_INUM;
+
+	if (oldflags != newflags)
+		return 0;
+
+	/*
+	 * We want to share sb only if we don't specify an r/wsize or
+	 * specified r/wsize is greater than or equal to existing one.
+	 */
+	if (new->ctx->wsize && new->ctx->wsize < old->ctx->wsize)
+		return 0;
+
+	if (new->ctx->rsize && new->ctx->rsize < old->ctx->rsize)
+		return 0;
+
+	if (!uid_eq(old->ctx->linux_uid, new->ctx->linux_uid) ||
+	    !gid_eq(old->ctx->linux_gid, new->ctx->linux_gid))
+		return 0;
+
+	if (old->ctx->file_mode != new->ctx->file_mode ||
+	    old->ctx->dir_mode != new->ctx->dir_mode)
+		return 0;
+
+	if (strcmp(old->local_nls->charset, new->local_nls->charset))
+		return 0;
+
+	if (old->ctx->acregmax != new->ctx->acregmax)
+		return 0;
+	if (old->ctx->acdirmax != new->ctx->acdirmax)
+		return 0;
+	if (old->ctx->closetimeo != new->ctx->closetimeo)
+		return 0;
+
+	return 1;
+}
+
+static int match_prepath(struct super_block *sb,
+			 struct cifs_tcon *tcon,
+			 struct cifs_mnt_data *mnt_data)
+{
+	struct smb3_fs_context *ctx = mnt_data->ctx;
+	struct cifs_sb_info *old = CIFS_SB(sb);
+	struct cifs_sb_info *new = mnt_data->cifs_sb;
+	bool old_set = (old->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) &&
+		old->prepath;
+	bool new_set = (new->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) &&
+		new->prepath;
+
+	if (tcon->origin_fullpath &&
+	    dfs_src_pathname_equal(tcon->origin_fullpath, ctx->source))
+		return 1;
+
+	if (old_set && new_set && !strcmp(new->prepath, old->prepath))
+		return 1;
+	else if (!old_set && !new_set)
+		return 1;
+
+	return 0;
+}
+
+int
+cifs_match_super(struct super_block *sb, void *data)
+{
+	struct cifs_mnt_data *mnt_data = data;
+	struct smb3_fs_context *ctx;
+	struct cifs_sb_info *cifs_sb;
+	struct TCP_Server_Info *tcp_srv;
+	struct cifs_ses *ses;
+	struct cifs_tcon *tcon;
+	struct tcon_link *tlink;
+	int rc = 0;
+
+	spin_lock(&cifs_tcp_ses_lock);
+	cifs_sb = CIFS_SB(sb);
+
+	/* We do not want to use a superblock that has been shutdown */
+	if (CIFS_MOUNT_SHUTDOWN & cifs_sb->mnt_cifs_flags) {
+		spin_unlock(&cifs_tcp_ses_lock);
+		return 0;
+	}
+
+	tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
+	if (IS_ERR_OR_NULL(tlink)) {
+		pr_warn_once("%s: skip super matching due to bad tlink(%p)\n",
+			     __func__, tlink);
+		spin_unlock(&cifs_tcp_ses_lock);
+		return 0;
+	}
+	tcon = tlink_tcon(tlink);
+	ses = tcon->ses;
+	tcp_srv = ses->server;
+
+	ctx = mnt_data->ctx;
+
+	spin_lock(&tcp_srv->srv_lock);
+	spin_lock(&ses->ses_lock);
+	spin_lock(&ses->chan_lock);
+	spin_lock(&tcon->tc_lock);
+	if (!match_server(tcp_srv, ctx, true) ||
+	    !match_session(ses, ctx) ||
+	    !match_tcon(tcon, ctx) ||
+	    !match_prepath(sb, tcon, mnt_data)) {
+		rc = 0;
+		goto out;
+	}
+
+	rc = compare_mount_options(sb, mnt_data);
+out:
+	spin_unlock(&tcon->tc_lock);
+	spin_unlock(&ses->chan_lock);
+	spin_unlock(&ses->ses_lock);
+	spin_unlock(&tcp_srv->srv_lock);
+
+	spin_unlock(&cifs_tcp_ses_lock);
+	cifs_put_tlink(tlink);
+	return rc;
+}
+
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+static struct lock_class_key cifs_key[2];
+static struct lock_class_key cifs_slock_key[2];
+
+static inline void
+cifs_reclassify_socket4(struct socket *sock)
+{
+	struct sock *sk = sock->sk;
+	BUG_ON(!sock_allow_reclassification(sk));
+	sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
+		&cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
+}
+
+static inline void
+cifs_reclassify_socket6(struct socket *sock)
+{
+	struct sock *sk = sock->sk;
+	BUG_ON(!sock_allow_reclassification(sk));
+	sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
+		&cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
+}
+#else
+static inline void
+cifs_reclassify_socket4(struct socket *sock)
+{
+}
+
+static inline void
+cifs_reclassify_socket6(struct socket *sock)
+{
+}
+#endif
+
+/* See RFC1001 section 14 on representation of Netbios names */
+static void rfc1002mangle(char *target, char *source, unsigned int length)
+{
+	unsigned int i, j;
+
+	for (i = 0, j = 0; i < (length); i++) {
+		/* mask a nibble at a time and encode */
+		target[j] = 'A' + (0x0F & (source[i] >> 4));
+		target[j+1] = 'A' + (0x0F & source[i]);
+		j += 2;
+	}
+
+}
+
+static int
+bind_socket(struct TCP_Server_Info *server)
+{
+	int rc = 0;
+	if (server->srcaddr.ss_family != AF_UNSPEC) {
+		/* Bind to the specified local IP address */
+		struct socket *socket = server->ssocket;
+		rc = kernel_bind(socket,
+				 (struct sockaddr *) &server->srcaddr,
+				 sizeof(server->srcaddr));
+		if (rc < 0) {
+			struct sockaddr_in *saddr4;
+			struct sockaddr_in6 *saddr6;
+			saddr4 = (struct sockaddr_in *)&server->srcaddr;
+			saddr6 = (struct sockaddr_in6 *)&server->srcaddr;
+			if (saddr6->sin6_family == AF_INET6)
+				cifs_server_dbg(VFS, "Failed to bind to: %pI6c, error: %d\n",
+					 &saddr6->sin6_addr, rc);
+			else
+				cifs_server_dbg(VFS, "Failed to bind to: %pI4, error: %d\n",
+					 &saddr4->sin_addr.s_addr, rc);
+		}
+	}
+	return rc;
+}
+
+static int
+ip_rfc1001_connect(struct TCP_Server_Info *server)
+{
+	int rc = 0;
+	/*
+	 * some servers require RFC1001 sessinit before sending
+	 * negprot - BB check reconnection in case where second
+	 * sessinit is sent but no second negprot
+	 */
+	struct rfc1002_session_packet req = {};
+	struct smb_hdr *smb_buf = (struct smb_hdr *)&req;
+	unsigned int len;
+
+	req.trailer.session_req.called_len = sizeof(req.trailer.session_req.called_name);
+
+	if (server->server_RFC1001_name[0] != 0)
+		rfc1002mangle(req.trailer.session_req.called_name,
+			      server->server_RFC1001_name,
+			      RFC1001_NAME_LEN_WITH_NULL);
+	else
+		rfc1002mangle(req.trailer.session_req.called_name,
+			      DEFAULT_CIFS_CALLED_NAME,
+			      RFC1001_NAME_LEN_WITH_NULL);
+
+	req.trailer.session_req.calling_len = sizeof(req.trailer.session_req.calling_name);
+
+	/* calling name ends in null (byte 16) from old smb convention */
+	if (server->workstation_RFC1001_name[0] != 0)
+		rfc1002mangle(req.trailer.session_req.calling_name,
+			      server->workstation_RFC1001_name,
+			      RFC1001_NAME_LEN_WITH_NULL);
+	else
+		rfc1002mangle(req.trailer.session_req.calling_name,
+			      "LINUX_CIFS_CLNT",
+			      RFC1001_NAME_LEN_WITH_NULL);
+
+	/*
+	 * As per rfc1002, @len must be the number of bytes that follows the
+	 * length field of a rfc1002 session request payload.
+	 */
+	len = sizeof(req) - offsetof(struct rfc1002_session_packet, trailer.session_req);
+
+	smb_buf->smb_buf_length = cpu_to_be32((RFC1002_SESSION_REQUEST << 24) | len);
+	rc = smb_send(server, smb_buf, len);
+	/*
+	 * RFC1001 layer in at least one server requires very short break before
+	 * negprot presumably because not expecting negprot to follow so fast.
+	 * This is a simple solution that works without complicating the code
+	 * and causes no significant slowing down on mount for everyone else
+	 */
+	usleep_range(1000, 2000);
+
+	return rc;
+}
+
+static int
+generic_ip_connect(struct TCP_Server_Info *server)
+{
+	struct sockaddr *saddr;
+	struct socket *socket;
+	int slen, sfamily;
+	__be16 sport;
+	int rc = 0;
+
+	saddr = (struct sockaddr *) &server->dstaddr;
+
+	if (server->dstaddr.ss_family == AF_INET6) {
+		struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&server->dstaddr;
+
+		sport = ipv6->sin6_port;
+		slen = sizeof(struct sockaddr_in6);
+		sfamily = AF_INET6;
+		cifs_dbg(FYI, "%s: connecting to [%pI6]:%d\n", __func__, &ipv6->sin6_addr,
+				ntohs(sport));
+	} else {
+		struct sockaddr_in *ipv4 = (struct sockaddr_in *)&server->dstaddr;
+
+		sport = ipv4->sin_port;
+		slen = sizeof(struct sockaddr_in);
+		sfamily = AF_INET;
+		cifs_dbg(FYI, "%s: connecting to %pI4:%d\n", __func__, &ipv4->sin_addr,
+				ntohs(sport));
+	}
+
+	if (server->ssocket) {
+		socket = server->ssocket;
+	} else {
+		rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM,
+				   IPPROTO_TCP, &server->ssocket, 1);
+		if (rc < 0) {
+			cifs_server_dbg(VFS, "Error %d creating socket\n", rc);
+			return rc;
+		}
+
+		/* BB other socket options to set KEEPALIVE, NODELAY? */
+		cifs_dbg(FYI, "Socket created\n");
+		socket = server->ssocket;
+		socket->sk->sk_allocation = GFP_NOFS;
+		socket->sk->sk_use_task_frag = false;
+		if (sfamily == AF_INET6)
+			cifs_reclassify_socket6(socket);
+		else
+			cifs_reclassify_socket4(socket);
+	}
+
+	rc = bind_socket(server);
+	if (rc < 0)
+		return rc;
+
+	/*
+	 * Eventually check for other socket options to change from
+	 * the default. sock_setsockopt not used because it expects
+	 * user space buffer
+	 */
+	socket->sk->sk_rcvtimeo = 7 * HZ;
+	socket->sk->sk_sndtimeo = 5 * HZ;
+
+	/* make the bufsizes depend on wsize/rsize and max requests */
+	if (server->noautotune) {
+		if (socket->sk->sk_sndbuf < (200 * 1024))
+			socket->sk->sk_sndbuf = 200 * 1024;
+		if (socket->sk->sk_rcvbuf < (140 * 1024))
+			socket->sk->sk_rcvbuf = 140 * 1024;
+	}
+
+	if (server->tcp_nodelay)
+		tcp_sock_set_nodelay(socket->sk);
+
+	cifs_dbg(FYI, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx\n",
+		 socket->sk->sk_sndbuf,
+		 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
+
+	rc = kernel_connect(socket, saddr, slen,
+			    server->noblockcnt ? O_NONBLOCK : 0);
+	/*
+	 * When mounting SMB root file systems, we do not want to block in
+	 * connect. Otherwise bail out and then let cifs_reconnect() perform
+	 * reconnect failover - if possible.
+	 */
+	if (server->noblockcnt && rc == -EINPROGRESS)
+		rc = 0;
+	if (rc < 0) {
+		cifs_dbg(FYI, "Error %d connecting to server\n", rc);
+		trace_smb3_connect_err(server->hostname, server->conn_id, &server->dstaddr, rc);
+		sock_release(socket);
+		server->ssocket = NULL;
+		return rc;
+	}
+	trace_smb3_connect_done(server->hostname, server->conn_id, &server->dstaddr);
+	if (sport == htons(RFC1001_PORT))
+		rc = ip_rfc1001_connect(server);
+
+	return rc;
+}
+
+static int
+ip_connect(struct TCP_Server_Info *server)
+{
+	__be16 *sport;
+	struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
+	struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
+
+	if (server->dstaddr.ss_family == AF_INET6)
+		sport = &addr6->sin6_port;
+	else
+		sport = &addr->sin_port;
+
+	if (*sport == 0) {
+		int rc;
+
+		/* try with 445 port at first */
+		*sport = htons(CIFS_PORT);
+
+		rc = generic_ip_connect(server);
+		if (rc >= 0)
+			return rc;
+
+		/* if it failed, try with 139 port */
+		*sport = htons(RFC1001_PORT);
+	}
+
+	return generic_ip_connect(server);
+}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon,
+			  struct cifs_sb_info *cifs_sb, struct smb3_fs_context *ctx)
+{
+	/*
+	 * If we are reconnecting then should we check to see if
+	 * any requested capabilities changed locally e.g. via
+	 * remount but we can not do much about it here
+	 * if they have (even if we could detect it by the following)
+	 * Perhaps we could add a backpointer to array of sb from tcon
+	 * or if we change to make all sb to same share the same
+	 * sb as NFS - then we only have one backpointer to sb.
+	 * What if we wanted to mount the server share twice once with
+	 * and once without posixacls or posix paths?
+	 */
+	__u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
+
+	if (ctx && ctx->no_linux_ext) {
+		tcon->fsUnixInfo.Capability = 0;
+		tcon->unix_ext = 0; /* Unix Extensions disabled */
+		cifs_dbg(FYI, "Linux protocol extensions disabled\n");
+		return;
+	} else if (ctx)
+		tcon->unix_ext = 1; /* Unix Extensions supported */
+
+	if (!tcon->unix_ext) {
+		cifs_dbg(FYI, "Unix extensions disabled so not set on reconnect\n");
+		return;
+	}
+
+	if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
+		__u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
+		cifs_dbg(FYI, "unix caps which server supports %lld\n", cap);
+		/*
+		 * check for reconnect case in which we do not
+		 * want to change the mount behavior if we can avoid it
+		 */
+		if (ctx == NULL) {
+			/*
+			 * turn off POSIX ACL and PATHNAMES if not set
+			 * originally at mount time
+			 */
+			if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
+				cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
+			if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
+				if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
+					cifs_dbg(VFS, "POSIXPATH support change\n");
+				cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
+			} else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
+				cifs_dbg(VFS, "possible reconnect error\n");
+				cifs_dbg(VFS, "server disabled POSIX path support\n");
+			}
+		}
+
+		if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
+			cifs_dbg(VFS, "per-share encryption not supported yet\n");
+
+		cap &= CIFS_UNIX_CAP_MASK;
+		if (ctx && ctx->no_psx_acl)
+			cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
+		else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
+			cifs_dbg(FYI, "negotiated posix acl support\n");
+			if (cifs_sb)
+				cifs_sb->mnt_cifs_flags |=
+					CIFS_MOUNT_POSIXACL;
+		}
+
+		if (ctx && ctx->posix_paths == 0)
+			cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
+		else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
+			cifs_dbg(FYI, "negotiate posix pathnames\n");
+			if (cifs_sb)
+				cifs_sb->mnt_cifs_flags |=
+					CIFS_MOUNT_POSIX_PATHS;
+		}
+
+		cifs_dbg(FYI, "Negotiate caps 0x%x\n", (int)cap);
+#ifdef CONFIG_CIFS_DEBUG2
+		if (cap & CIFS_UNIX_FCNTL_CAP)
+			cifs_dbg(FYI, "FCNTL cap\n");
+		if (cap & CIFS_UNIX_EXTATTR_CAP)
+			cifs_dbg(FYI, "EXTATTR cap\n");
+		if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
+			cifs_dbg(FYI, "POSIX path cap\n");
+		if (cap & CIFS_UNIX_XATTR_CAP)
+			cifs_dbg(FYI, "XATTR cap\n");
+		if (cap & CIFS_UNIX_POSIX_ACL_CAP)
+			cifs_dbg(FYI, "POSIX ACL cap\n");
+		if (cap & CIFS_UNIX_LARGE_READ_CAP)
+			cifs_dbg(FYI, "very large read cap\n");
+		if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
+			cifs_dbg(FYI, "very large write cap\n");
+		if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP)
+			cifs_dbg(FYI, "transport encryption cap\n");
+		if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
+			cifs_dbg(FYI, "mandatory transport encryption cap\n");
+#endif /* CIFS_DEBUG2 */
+		if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
+			if (ctx == NULL)
+				cifs_dbg(FYI, "resetting capabilities failed\n");
+			else
+				cifs_dbg(VFS, "Negotiating Unix capabilities with the server failed. Consider mounting with the Unix Extensions disabled if problems are found by specifying the nounix mount option.\n");
+
+		}
+	}
+}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+int cifs_setup_cifs_sb(struct cifs_sb_info *cifs_sb)
+{
+	struct smb3_fs_context *ctx = cifs_sb->ctx;
+
+	INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks);
+
+	spin_lock_init(&cifs_sb->tlink_tree_lock);
+	cifs_sb->tlink_tree = RB_ROOT;
+
+	cifs_dbg(FYI, "file mode: %04ho  dir mode: %04ho\n",
+		 ctx->file_mode, ctx->dir_mode);
+
+	/* this is needed for ASCII cp to Unicode converts */
+	if (ctx->iocharset == NULL) {
+		/* load_nls_default cannot return null */
+		cifs_sb->local_nls = load_nls_default();
+	} else {
+		cifs_sb->local_nls = load_nls(ctx->iocharset);
+		if (cifs_sb->local_nls == NULL) {
+			cifs_dbg(VFS, "CIFS mount error: iocharset %s not found\n",
+				 ctx->iocharset);
+			return -ELIBACC;
+		}
+	}
+	ctx->local_nls = cifs_sb->local_nls;
+
+	smb3_update_mnt_flags(cifs_sb);
+
+	if (ctx->direct_io)
+		cifs_dbg(FYI, "mounting share using direct i/o\n");
+	if (ctx->cache_ro) {
+		cifs_dbg(VFS, "mounting share with read only caching. Ensure that the share will not be modified while in use.\n");
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RO_CACHE;
+	} else if (ctx->cache_rw) {
+		cifs_dbg(VFS, "mounting share in single client RW caching mode. Ensure that no other systems will be accessing the share.\n");
+		cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_RO_CACHE |
+					    CIFS_MOUNT_RW_CACHE);
+	}
+
+	if ((ctx->cifs_acl) && (ctx->dynperm))
+		cifs_dbg(VFS, "mount option dynperm ignored if cifsacl mount option supported\n");
+
+	if (ctx->prepath) {
+		cifs_sb->prepath = kstrdup(ctx->prepath, GFP_KERNEL);
+		if (cifs_sb->prepath == NULL)
+			return -ENOMEM;
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_USE_PREFIX_PATH;
+	}
+
+	return 0;
+}
+
+/* Release all succeed connections */
+void cifs_mount_put_conns(struct cifs_mount_ctx *mnt_ctx)
+{
+	int rc = 0;
+
+	if (mnt_ctx->tcon)
+		cifs_put_tcon(mnt_ctx->tcon);
+	else if (mnt_ctx->ses)
+		cifs_put_smb_ses(mnt_ctx->ses);
+	else if (mnt_ctx->server)
+		cifs_put_tcp_session(mnt_ctx->server, 0);
+	mnt_ctx->cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_POSIX_PATHS;
+	free_xid(mnt_ctx->xid);
+}
+
+int cifs_mount_get_session(struct cifs_mount_ctx *mnt_ctx)
+{
+	struct TCP_Server_Info *server = NULL;
+	struct smb3_fs_context *ctx;
+	struct cifs_ses *ses = NULL;
+	unsigned int xid;
+	int rc = 0;
+
+	xid = get_xid();
+
+	if (WARN_ON_ONCE(!mnt_ctx || !mnt_ctx->fs_ctx)) {
+		rc = -EINVAL;
+		goto out;
+	}
+	ctx = mnt_ctx->fs_ctx;
+
+	/* get a reference to a tcp session */
+	server = cifs_get_tcp_session(ctx, NULL);
+	if (IS_ERR(server)) {
+		rc = PTR_ERR(server);
+		server = NULL;
+		goto out;
+	}
+
+	/* get a reference to a SMB session */
+	ses = cifs_get_smb_ses(server, ctx);
+	if (IS_ERR(ses)) {
+		rc = PTR_ERR(ses);
+		ses = NULL;
+		goto out;
+	}
+
+	if ((ctx->persistent == true) && (!(ses->server->capabilities &
+					    SMB2_GLOBAL_CAP_PERSISTENT_HANDLES))) {
+		cifs_server_dbg(VFS, "persistent handles not supported by server\n");
+		rc = -EOPNOTSUPP;
+	}
+
+out:
+	mnt_ctx->xid = xid;
+	mnt_ctx->server = server;
+	mnt_ctx->ses = ses;
+	mnt_ctx->tcon = NULL;
+
+	return rc;
+}
+
+int cifs_mount_get_tcon(struct cifs_mount_ctx *mnt_ctx)
+{
+	struct TCP_Server_Info *server;
+	struct cifs_sb_info *cifs_sb;
+	struct smb3_fs_context *ctx;
+	struct cifs_tcon *tcon = NULL;
+	int rc = 0;
+
+	if (WARN_ON_ONCE(!mnt_ctx || !mnt_ctx->server || !mnt_ctx->ses || !mnt_ctx->fs_ctx ||
+			 !mnt_ctx->cifs_sb)) {
+		rc = -EINVAL;
+		goto out;
+	}
+	server = mnt_ctx->server;
+	ctx = mnt_ctx->fs_ctx;
+	cifs_sb = mnt_ctx->cifs_sb;
+
+	/* search for existing tcon to this server share */
+	tcon = cifs_get_tcon(mnt_ctx->ses, ctx);
+	if (IS_ERR(tcon)) {
+		rc = PTR_ERR(tcon);
+		tcon = NULL;
+		goto out;
+	}
+
+	/* if new SMB3.11 POSIX extensions are supported do not remap / and \ */
+	if (tcon->posix_extensions)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_POSIX_PATHS;
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	/* tell server which Unix caps we support */
+	if (cap_unix(tcon->ses)) {
+		/*
+		 * reset of caps checks mount to see if unix extensions disabled
+		 * for just this mount.
+		 */
+		reset_cifs_unix_caps(mnt_ctx->xid, tcon, cifs_sb, ctx);
+		spin_lock(&tcon->ses->server->srv_lock);
+		if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) &&
+		    (le64_to_cpu(tcon->fsUnixInfo.Capability) &
+		     CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) {
+			spin_unlock(&tcon->ses->server->srv_lock);
+			rc = -EACCES;
+			goto out;
+		}
+		spin_unlock(&tcon->ses->server->srv_lock);
+	} else
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+		tcon->unix_ext = 0; /* server does not support them */
+
+	/* do not care if a following call succeed - informational */
+	if (!tcon->pipe && server->ops->qfs_tcon) {
+		server->ops->qfs_tcon(mnt_ctx->xid, tcon, cifs_sb);
+		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RO_CACHE) {
+			if (tcon->fsDevInfo.DeviceCharacteristics &
+			    cpu_to_le32(FILE_READ_ONLY_DEVICE))
+				cifs_dbg(VFS, "mounted to read only share\n");
+			else if ((cifs_sb->mnt_cifs_flags &
+				  CIFS_MOUNT_RW_CACHE) == 0)
+				cifs_dbg(VFS, "read only mount of RW share\n");
+			/* no need to log a RW mount of a typical RW share */
+		}
+	}
+
+	/*
+	 * Clamp the rsize/wsize mount arguments if they are too big for the server
+	 * and set the rsize/wsize to the negotiated values if not passed in by
+	 * the user on mount
+	 */
+	if ((cifs_sb->ctx->wsize == 0) ||
+	    (cifs_sb->ctx->wsize > server->ops->negotiate_wsize(tcon, ctx)))
+		cifs_sb->ctx->wsize = server->ops->negotiate_wsize(tcon, ctx);
+	if ((cifs_sb->ctx->rsize == 0) ||
+	    (cifs_sb->ctx->rsize > server->ops->negotiate_rsize(tcon, ctx)))
+		cifs_sb->ctx->rsize = server->ops->negotiate_rsize(tcon, ctx);
+
+	/*
+	 * The cookie is initialized from volume info returned above.
+	 * Inside cifs_fscache_get_super_cookie it checks
+	 * that we do not get super cookie twice.
+	 */
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
+		cifs_fscache_get_super_cookie(tcon);
+
+out:
+	mnt_ctx->tcon = tcon;
+	return rc;
+}
+
+static int mount_setup_tlink(struct cifs_sb_info *cifs_sb, struct cifs_ses *ses,
+			     struct cifs_tcon *tcon)
+{
+	struct tcon_link *tlink;
+
+	/* hang the tcon off of the superblock */
+	tlink = kzalloc(sizeof(*tlink), GFP_KERNEL);
+	if (tlink == NULL)
+		return -ENOMEM;
+
+	tlink->tl_uid = ses->linux_uid;
+	tlink->tl_tcon = tcon;
+	tlink->tl_time = jiffies;
+	set_bit(TCON_LINK_MASTER, &tlink->tl_flags);
+	set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
+
+	cifs_sb->master_tlink = tlink;
+	spin_lock(&cifs_sb->tlink_tree_lock);
+	tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
+	spin_unlock(&cifs_sb->tlink_tree_lock);
+
+	queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
+				TLINK_IDLE_EXPIRE);
+	return 0;
+}
+
+static int
+cifs_are_all_path_components_accessible(struct TCP_Server_Info *server,
+					unsigned int xid,
+					struct cifs_tcon *tcon,
+					struct cifs_sb_info *cifs_sb,
+					char *full_path,
+					int added_treename)
+{
+	int rc;
+	char *s;
+	char sep, tmp;
+	int skip = added_treename ? 1 : 0;
+
+	sep = CIFS_DIR_SEP(cifs_sb);
+	s = full_path;
+
+	rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, "");
+	while (rc == 0) {
+		/* skip separators */
+		while (*s == sep)
+			s++;
+		if (!*s)
+			break;
+		/* next separator */
+		while (*s && *s != sep)
+			s++;
+		/*
+		 * if the treename is added, we then have to skip the first
+		 * part within the separators
+		 */
+		if (skip) {
+			skip = 0;
+			continue;
+		}
+		/*
+		 * temporarily null-terminate the path at the end of
+		 * the current component
+		 */
+		tmp = *s;
+		*s = 0;
+		rc = server->ops->is_path_accessible(xid, tcon, cifs_sb,
+						     full_path);
+		*s = tmp;
+	}
+	return rc;
+}
+
+/*
+ * Check if path is remote (i.e. a DFS share).
+ *
+ * Return -EREMOTE if it is, otherwise 0 or -errno.
+ */
+int cifs_is_path_remote(struct cifs_mount_ctx *mnt_ctx)
+{
+	int rc;
+	struct cifs_sb_info *cifs_sb = mnt_ctx->cifs_sb;
+	struct TCP_Server_Info *server = mnt_ctx->server;
+	unsigned int xid = mnt_ctx->xid;
+	struct cifs_tcon *tcon = mnt_ctx->tcon;
+	struct smb3_fs_context *ctx = mnt_ctx->fs_ctx;
+	char *full_path;
+
+	if (!server->ops->is_path_accessible)
+		return -EOPNOTSUPP;
+
+	/*
+	 * cifs_build_path_to_root works only when we have a valid tcon
+	 */
+	full_path = cifs_build_path_to_root(ctx, cifs_sb, tcon,
+					    tcon->Flags & SMB_SHARE_IS_IN_DFS);
+	if (full_path == NULL)
+		return -ENOMEM;
+
+	cifs_dbg(FYI, "%s: full_path: %s\n", __func__, full_path);
+
+	rc = server->ops->is_path_accessible(xid, tcon, cifs_sb,
+					     full_path);
+	if (rc != 0 && rc != -EREMOTE)
+		goto out;
+
+	if (rc != -EREMOTE) {
+		rc = cifs_are_all_path_components_accessible(server, xid, tcon,
+			cifs_sb, full_path, tcon->Flags & SMB_SHARE_IS_IN_DFS);
+		if (rc != 0) {
+			cifs_server_dbg(VFS, "cannot query dirs between root and final path, enabling CIFS_MOUNT_USE_PREFIX_PATH\n");
+			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_USE_PREFIX_PATH;
+			rc = 0;
+		}
+	}
+
+out:
+	kfree(full_path);
+	return rc;
+}
+
+#ifdef CONFIG_CIFS_DFS_UPCALL
+int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb3_fs_context *ctx)
+{
+	struct cifs_mount_ctx mnt_ctx = { .cifs_sb = cifs_sb, .fs_ctx = ctx, };
+	bool isdfs;
+	int rc;
+
+	INIT_LIST_HEAD(&mnt_ctx.dfs_ses_list);
+
+	rc = dfs_mount_share(&mnt_ctx, &isdfs);
+	if (rc)
+		goto error;
+	if (!isdfs)
+		goto out;
+
+	/*
+	 * After reconnecting to a different server, unique ids won't match anymore, so we disable
+	 * serverino. This prevents dentry revalidation to think the dentry are stale (ESTALE).
+	 */
+	cifs_autodisable_serverino(cifs_sb);
+	/*
+	 * Force the use of prefix path to support failover on DFS paths that resolve to targets
+	 * that have different prefix paths.
+	 */
+	cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_USE_PREFIX_PATH;
+	kfree(cifs_sb->prepath);
+	cifs_sb->prepath = ctx->prepath;
+	ctx->prepath = NULL;
+
+out:
+	cifs_try_adding_channels(mnt_ctx.ses);
+	rc = mount_setup_tlink(cifs_sb, mnt_ctx.ses, mnt_ctx.tcon);
+	if (rc)
+		goto error;
+
+	free_xid(mnt_ctx.xid);
+	return rc;
+
+error:
+	dfs_put_root_smb_sessions(&mnt_ctx.dfs_ses_list);
+	cifs_mount_put_conns(&mnt_ctx);
+	return rc;
+}
+#else
+int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb3_fs_context *ctx)
+{
+	int rc = 0;
+	struct cifs_mount_ctx mnt_ctx = { .cifs_sb = cifs_sb, .fs_ctx = ctx, };
+
+	rc = cifs_mount_get_session(&mnt_ctx);
+	if (rc)
+		goto error;
+
+	rc = cifs_mount_get_tcon(&mnt_ctx);
+	if (rc)
+		goto error;
+
+	rc = cifs_is_path_remote(&mnt_ctx);
+	if (rc == -EREMOTE)
+		rc = -EOPNOTSUPP;
+	if (rc)
+		goto error;
+
+	rc = mount_setup_tlink(cifs_sb, mnt_ctx.ses, mnt_ctx.tcon);
+	if (rc)
+		goto error;
+
+	free_xid(mnt_ctx.xid);
+	return rc;
+
+error:
+	cifs_mount_put_conns(&mnt_ctx);
+	return rc;
+}
+#endif
+
+/*
+ * Issue a TREE_CONNECT request.
+ */
+int
+CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
+	 const char *tree, struct cifs_tcon *tcon,
+	 const struct nls_table *nls_codepage)
+{
+	struct smb_hdr *smb_buffer;
+	struct smb_hdr *smb_buffer_response;
+	TCONX_REQ *pSMB;
+	TCONX_RSP *pSMBr;
+	unsigned char *bcc_ptr;
+	int rc = 0;
+	int length;
+	__u16 bytes_left, count;
+
+	if (ses == NULL)
+		return -EIO;
+
+	smb_buffer = cifs_buf_get();
+	if (smb_buffer == NULL)
+		return -ENOMEM;
+
+	smb_buffer_response = smb_buffer;
+
+	header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
+			NULL /*no tid */ , 4 /*wct */ );
+
+	smb_buffer->Mid = get_next_mid(ses->server);
+	smb_buffer->Uid = ses->Suid;
+	pSMB = (TCONX_REQ *) smb_buffer;
+	pSMBr = (TCONX_RSP *) smb_buffer_response;
+
+	pSMB->AndXCommand = 0xFF;
+	pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
+	bcc_ptr = &pSMB->Password[0];
+
+	pSMB->PasswordLength = cpu_to_le16(1);	/* minimum */
+	*bcc_ptr = 0; /* password is null byte */
+	bcc_ptr++;              /* skip password */
+	/* already aligned so no need to do it below */
+
+	if (ses->server->sign)
+		smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
+
+	if (ses->capabilities & CAP_STATUS32) {
+		smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
+	}
+	if (ses->capabilities & CAP_DFS) {
+		smb_buffer->Flags2 |= SMBFLG2_DFS;
+	}
+	if (ses->capabilities & CAP_UNICODE) {
+		smb_buffer->Flags2 |= SMBFLG2_UNICODE;
+		length =
+		    cifs_strtoUTF16((__le16 *) bcc_ptr, tree,
+			6 /* max utf8 char length in bytes */ *
+			(/* server len*/ + 256 /* share len */), nls_codepage);
+		bcc_ptr += 2 * length;	/* convert num 16 bit words to bytes */
+		bcc_ptr += 2;	/* skip trailing null */
+	} else {		/* ASCII */
+		strcpy(bcc_ptr, tree);
+		bcc_ptr += strlen(tree) + 1;
+	}
+	strcpy(bcc_ptr, "?????");
+	bcc_ptr += strlen("?????");
+	bcc_ptr += 1;
+	count = bcc_ptr - &pSMB->Password[0];
+	be32_add_cpu(&pSMB->hdr.smb_buf_length, count);
+	pSMB->ByteCount = cpu_to_le16(count);
+
+	rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
+			 0);
+
+	/* above now done in SendReceive */
+	if (rc == 0) {
+		bool is_unicode;
+
+		tcon->tid = smb_buffer_response->Tid;
+		bcc_ptr = pByteArea(smb_buffer_response);
+		bytes_left = get_bcc(smb_buffer_response);
+		length = strnlen(bcc_ptr, bytes_left - 2);
+		if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
+			is_unicode = true;
+		else
+			is_unicode = false;
+
+
+		/* skip service field (NB: this field is always ASCII) */
+		if (length == 3) {
+			if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
+			    (bcc_ptr[2] == 'C')) {
+				cifs_dbg(FYI, "IPC connection\n");
+				tcon->ipc = true;
+				tcon->pipe = true;
+			}
+		} else if (length == 2) {
+			if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
+				/* the most common case */
+				cifs_dbg(FYI, "disk share connection\n");
+			}
+		}
+		bcc_ptr += length + 1;
+		bytes_left -= (length + 1);
+		strscpy(tcon->tree_name, tree, sizeof(tcon->tree_name));
+
+		/* mostly informational -- no need to fail on error here */
+		kfree(tcon->nativeFileSystem);
+		tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr,
+						      bytes_left, is_unicode,
+						      nls_codepage);
+
+		cifs_dbg(FYI, "nativeFileSystem=%s\n", tcon->nativeFileSystem);
+
+		if ((smb_buffer_response->WordCount == 3) ||
+			 (smb_buffer_response->WordCount == 7))
+			/* field is in same location */
+			tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
+		else
+			tcon->Flags = 0;
+		cifs_dbg(FYI, "Tcon flags: 0x%x\n", tcon->Flags);
+	}
+
+	cifs_buf_release(smb_buffer);
+	return rc;
+}
+
+static void delayed_free(struct rcu_head *p)
+{
+	struct cifs_sb_info *cifs_sb = container_of(p, struct cifs_sb_info, rcu);
+
+	unload_nls(cifs_sb->local_nls);
+	smb3_cleanup_fs_context(cifs_sb->ctx);
+	kfree(cifs_sb);
+}
+
+void
+cifs_umount(struct cifs_sb_info *cifs_sb)
+{
+	struct rb_root *root = &cifs_sb->tlink_tree;
+	struct rb_node *node;
+	struct tcon_link *tlink;
+
+	cancel_delayed_work_sync(&cifs_sb->prune_tlinks);
+
+	spin_lock(&cifs_sb->tlink_tree_lock);
+	while ((node = rb_first(root))) {
+		tlink = rb_entry(node, struct tcon_link, tl_rbnode);
+		cifs_get_tlink(tlink);
+		clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
+		rb_erase(node, root);
+
+		spin_unlock(&cifs_sb->tlink_tree_lock);
+		cifs_put_tlink(tlink);
+		spin_lock(&cifs_sb->tlink_tree_lock);
+	}
+	spin_unlock(&cifs_sb->tlink_tree_lock);
+
+	kfree(cifs_sb->prepath);
+	call_rcu(&cifs_sb->rcu, delayed_free);
+}
+
+int
+cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses,
+			struct TCP_Server_Info *server)
+{
+	int rc = 0;
+
+	if (!server->ops->need_neg || !server->ops->negotiate)
+		return -ENOSYS;
+
+	/* only send once per connect */
+	spin_lock(&server->srv_lock);
+	if (server->tcpStatus != CifsGood &&
+	    server->tcpStatus != CifsNew &&
+	    server->tcpStatus != CifsNeedNegotiate) {
+		spin_unlock(&server->srv_lock);
+		return -EHOSTDOWN;
+	}
+
+	if (!server->ops->need_neg(server) &&
+	    server->tcpStatus == CifsGood) {
+		spin_unlock(&server->srv_lock);
+		return 0;
+	}
+
+	server->tcpStatus = CifsInNegotiate;
+	spin_unlock(&server->srv_lock);
+
+	rc = server->ops->negotiate(xid, ses, server);
+	if (rc == 0) {
+		spin_lock(&server->srv_lock);
+		if (server->tcpStatus == CifsInNegotiate)
+			server->tcpStatus = CifsGood;
+		else
+			rc = -EHOSTDOWN;
+		spin_unlock(&server->srv_lock);
+	} else {
+		spin_lock(&server->srv_lock);
+		if (server->tcpStatus == CifsInNegotiate)
+			server->tcpStatus = CifsNeedNegotiate;
+		spin_unlock(&server->srv_lock);
+	}
+
+	return rc;
+}
+
+int
+cifs_setup_session(const unsigned int xid, struct cifs_ses *ses,
+		   struct TCP_Server_Info *server,
+		   struct nls_table *nls_info)
+{
+	int rc = -ENOSYS;
+	struct TCP_Server_Info *pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
+	struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&pserver->dstaddr;
+	struct sockaddr_in *addr = (struct sockaddr_in *)&pserver->dstaddr;
+	bool is_binding = false;
+
+	spin_lock(&ses->ses_lock);
+	cifs_dbg(FYI, "%s: channel connect bitmap: 0x%lx\n",
+		 __func__, ses->chans_need_reconnect);
+
+	if (ses->ses_status != SES_GOOD &&
+	    ses->ses_status != SES_NEW &&
+	    ses->ses_status != SES_NEED_RECON) {
+		spin_unlock(&ses->ses_lock);
+		return -EHOSTDOWN;
+	}
+
+	/* only send once per connect */
+	spin_lock(&ses->chan_lock);
+	if (CIFS_ALL_CHANS_GOOD(ses)) {
+		if (ses->ses_status == SES_NEED_RECON)
+			ses->ses_status = SES_GOOD;
+		spin_unlock(&ses->chan_lock);
+		spin_unlock(&ses->ses_lock);
+		return 0;
+	}
+
+	cifs_chan_set_in_reconnect(ses, server);
+	is_binding = !CIFS_ALL_CHANS_NEED_RECONNECT(ses);
+	spin_unlock(&ses->chan_lock);
+
+	if (!is_binding) {
+		ses->ses_status = SES_IN_SETUP;
+
+		/* force iface_list refresh */
+		ses->iface_last_update = 0;
+	}
+	spin_unlock(&ses->ses_lock);
+
+	/* update ses ip_addr only for primary chan */
+	if (server == pserver) {
+		if (server->dstaddr.ss_family == AF_INET6)
+			scnprintf(ses->ip_addr, sizeof(ses->ip_addr), "%pI6", &addr6->sin6_addr);
+		else
+			scnprintf(ses->ip_addr, sizeof(ses->ip_addr), "%pI4", &addr->sin_addr);
+	}
+
+	if (!is_binding) {
+		ses->capabilities = server->capabilities;
+		if (!linuxExtEnabled)
+			ses->capabilities &= (~server->vals->cap_unix);
+
+		if (ses->auth_key.response) {
+			cifs_dbg(FYI, "Free previous auth_key.response = %p\n",
+				 ses->auth_key.response);
+			kfree_sensitive(ses->auth_key.response);
+			ses->auth_key.response = NULL;
+			ses->auth_key.len = 0;
+		}
+	}
+
+	cifs_dbg(FYI, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n",
+		 server->sec_mode, server->capabilities, server->timeAdj);
+
+	if (server->ops->sess_setup)
+		rc = server->ops->sess_setup(xid, ses, server, nls_info);
+
+	if (rc) {
+		cifs_server_dbg(VFS, "Send error in SessSetup = %d\n", rc);
+		spin_lock(&ses->ses_lock);
+		if (ses->ses_status == SES_IN_SETUP)
+			ses->ses_status = SES_NEED_RECON;
+		spin_lock(&ses->chan_lock);
+		cifs_chan_clear_in_reconnect(ses, server);
+		spin_unlock(&ses->chan_lock);
+		spin_unlock(&ses->ses_lock);
+	} else {
+		spin_lock(&ses->ses_lock);
+		if (ses->ses_status == SES_IN_SETUP)
+			ses->ses_status = SES_GOOD;
+		spin_lock(&ses->chan_lock);
+		cifs_chan_clear_in_reconnect(ses, server);
+		cifs_chan_clear_need_reconnect(ses, server);
+		spin_unlock(&ses->chan_lock);
+		spin_unlock(&ses->ses_lock);
+	}
+
+	return rc;
+}
+
+static int
+cifs_set_vol_auth(struct smb3_fs_context *ctx, struct cifs_ses *ses)
+{
+	ctx->sectype = ses->sectype;
+
+	/* krb5 is special, since we don't need username or pw */
+	if (ctx->sectype == Kerberos)
+		return 0;
+
+	return cifs_set_cifscreds(ctx, ses);
+}
+
+static struct cifs_tcon *
+cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid)
+{
+	int rc;
+	struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb);
+	struct cifs_ses *ses;
+	struct cifs_tcon *tcon = NULL;
+	struct smb3_fs_context *ctx;
+
+	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+	if (ctx == NULL)
+		return ERR_PTR(-ENOMEM);
+
+	ctx->local_nls = cifs_sb->local_nls;
+	ctx->linux_uid = fsuid;
+	ctx->cred_uid = fsuid;
+	ctx->UNC = master_tcon->tree_name;
+	ctx->retry = master_tcon->retry;
+	ctx->nocase = master_tcon->nocase;
+	ctx->nohandlecache = master_tcon->nohandlecache;
+	ctx->local_lease = master_tcon->local_lease;
+	ctx->no_lease = master_tcon->no_lease;
+	ctx->resilient = master_tcon->use_resilient;
+	ctx->persistent = master_tcon->use_persistent;
+	ctx->handle_timeout = master_tcon->handle_timeout;
+	ctx->no_linux_ext = !master_tcon->unix_ext;
+	ctx->linux_ext = master_tcon->posix_extensions;
+	ctx->sectype = master_tcon->ses->sectype;
+	ctx->sign = master_tcon->ses->sign;
+	ctx->seal = master_tcon->seal;
+	ctx->witness = master_tcon->use_witness;
+
+	rc = cifs_set_vol_auth(ctx, master_tcon->ses);
+	if (rc) {
+		tcon = ERR_PTR(rc);
+		goto out;
+	}
+
+	/* get a reference for the same TCP session */
+	spin_lock(&cifs_tcp_ses_lock);
+	++master_tcon->ses->server->srv_count;
+	spin_unlock(&cifs_tcp_ses_lock);
+
+	ses = cifs_get_smb_ses(master_tcon->ses->server, ctx);
+	if (IS_ERR(ses)) {
+		tcon = (struct cifs_tcon *)ses;
+		cifs_put_tcp_session(master_tcon->ses->server, 0);
+		goto out;
+	}
+
+	tcon = cifs_get_tcon(ses, ctx);
+	if (IS_ERR(tcon)) {
+		cifs_put_smb_ses(ses);
+		goto out;
+	}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	if (cap_unix(ses))
+		reset_cifs_unix_caps(0, tcon, NULL, ctx);
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+out:
+	kfree(ctx->username);
+	kfree_sensitive(ctx->password);
+	kfree(ctx);
+
+	return tcon;
+}
+
+struct cifs_tcon *
+cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb)
+{
+	return tlink_tcon(cifs_sb_master_tlink(cifs_sb));
+}
+
+/* find and return a tlink with given uid */
+static struct tcon_link *
+tlink_rb_search(struct rb_root *root, kuid_t uid)
+{
+	struct rb_node *node = root->rb_node;
+	struct tcon_link *tlink;
+
+	while (node) {
+		tlink = rb_entry(node, struct tcon_link, tl_rbnode);
+
+		if (uid_gt(tlink->tl_uid, uid))
+			node = node->rb_left;
+		else if (uid_lt(tlink->tl_uid, uid))
+			node = node->rb_right;
+		else
+			return tlink;
+	}
+	return NULL;
+}
+
+/* insert a tcon_link into the tree */
+static void
+tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink)
+{
+	struct rb_node **new = &(root->rb_node), *parent = NULL;
+	struct tcon_link *tlink;
+
+	while (*new) {
+		tlink = rb_entry(*new, struct tcon_link, tl_rbnode);
+		parent = *new;
+
+		if (uid_gt(tlink->tl_uid, new_tlink->tl_uid))
+			new = &((*new)->rb_left);
+		else
+			new = &((*new)->rb_right);
+	}
+
+	rb_link_node(&new_tlink->tl_rbnode, parent, new);
+	rb_insert_color(&new_tlink->tl_rbnode, root);
+}
+
+/*
+ * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the
+ * current task.
+ *
+ * If the superblock doesn't refer to a multiuser mount, then just return
+ * the master tcon for the mount.
+ *
+ * First, search the rbtree for an existing tcon for this fsuid. If one
+ * exists, then check to see if it's pending construction. If it is then wait
+ * for construction to complete. Once it's no longer pending, check to see if
+ * it failed and either return an error or retry construction, depending on
+ * the timeout.
+ *
+ * If one doesn't exist then insert a new tcon_link struct into the tree and
+ * try to construct a new one.
+ */
+struct tcon_link *
+cifs_sb_tlink(struct cifs_sb_info *cifs_sb)
+{
+	int ret;
+	kuid_t fsuid = current_fsuid();
+	struct tcon_link *tlink, *newtlink;
+
+	if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER))
+		return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
+
+	spin_lock(&cifs_sb->tlink_tree_lock);
+	tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
+	if (tlink)
+		cifs_get_tlink(tlink);
+	spin_unlock(&cifs_sb->tlink_tree_lock);
+
+	if (tlink == NULL) {
+		newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL);
+		if (newtlink == NULL)
+			return ERR_PTR(-ENOMEM);
+		newtlink->tl_uid = fsuid;
+		newtlink->tl_tcon = ERR_PTR(-EACCES);
+		set_bit(TCON_LINK_PENDING, &newtlink->tl_flags);
+		set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags);
+		cifs_get_tlink(newtlink);
+
+		spin_lock(&cifs_sb->tlink_tree_lock);
+		/* was one inserted after previous search? */
+		tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
+		if (tlink) {
+			cifs_get_tlink(tlink);
+			spin_unlock(&cifs_sb->tlink_tree_lock);
+			kfree(newtlink);
+			goto wait_for_construction;
+		}
+		tlink = newtlink;
+		tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
+		spin_unlock(&cifs_sb->tlink_tree_lock);
+	} else {
+wait_for_construction:
+		ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING,
+				  TASK_INTERRUPTIBLE);
+		if (ret) {
+			cifs_put_tlink(tlink);
+			return ERR_PTR(-ERESTARTSYS);
+		}
+
+		/* if it's good, return it */
+		if (!IS_ERR(tlink->tl_tcon))
+			return tlink;
+
+		/* return error if we tried this already recently */
+		if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) {
+			cifs_put_tlink(tlink);
+			return ERR_PTR(-EACCES);
+		}
+
+		if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags))
+			goto wait_for_construction;
+	}
+
+	tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid);
+	clear_bit(TCON_LINK_PENDING, &tlink->tl_flags);
+	wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING);
+
+	if (IS_ERR(tlink->tl_tcon)) {
+		cifs_put_tlink(tlink);
+		return ERR_PTR(-EACCES);
+	}
+
+	return tlink;
+}
+
+/*
+ * periodic workqueue job that scans tcon_tree for a superblock and closes
+ * out tcons.
+ */
+static void
+cifs_prune_tlinks(struct work_struct *work)
+{
+	struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info,
+						    prune_tlinks.work);
+	struct rb_root *root = &cifs_sb->tlink_tree;
+	struct rb_node *node;
+	struct rb_node *tmp;
+	struct tcon_link *tlink;
+
+	/*
+	 * Because we drop the spinlock in the loop in order to put the tlink
+	 * it's not guarded against removal of links from the tree. The only
+	 * places that remove entries from the tree are this function and
+	 * umounts. Because this function is non-reentrant and is canceled
+	 * before umount can proceed, this is safe.
+	 */
+	spin_lock(&cifs_sb->tlink_tree_lock);
+	node = rb_first(root);
+	while (node != NULL) {
+		tmp = node;
+		node = rb_next(tmp);
+		tlink = rb_entry(tmp, struct tcon_link, tl_rbnode);
+
+		if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) ||
+		    atomic_read(&tlink->tl_count) != 0 ||
+		    time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies))
+			continue;
+
+		cifs_get_tlink(tlink);
+		clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
+		rb_erase(tmp, root);
+
+		spin_unlock(&cifs_sb->tlink_tree_lock);
+		cifs_put_tlink(tlink);
+		spin_lock(&cifs_sb->tlink_tree_lock);
+	}
+	spin_unlock(&cifs_sb->tlink_tree_lock);
+
+	queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
+				TLINK_IDLE_EXPIRE);
+}
+
+#ifndef CONFIG_CIFS_DFS_UPCALL
+int cifs_tree_connect(const unsigned int xid, struct cifs_tcon *tcon, const struct nls_table *nlsc)
+{
+	int rc;
+	const struct smb_version_operations *ops = tcon->ses->server->ops;
+
+	/* only send once per connect */
+	spin_lock(&tcon->tc_lock);
+	if (tcon->status == TID_GOOD) {
+		spin_unlock(&tcon->tc_lock);
+		return 0;
+	}
+
+	if (tcon->status != TID_NEW &&
+	    tcon->status != TID_NEED_TCON) {
+		spin_unlock(&tcon->tc_lock);
+		return -EHOSTDOWN;
+	}
+
+	tcon->status = TID_IN_TCON;
+	spin_unlock(&tcon->tc_lock);
+
+	rc = ops->tree_connect(xid, tcon->ses, tcon->tree_name, tcon, nlsc);
+	if (rc) {
+		spin_lock(&tcon->tc_lock);
+		if (tcon->status == TID_IN_TCON)
+			tcon->status = TID_NEED_TCON;
+		spin_unlock(&tcon->tc_lock);
+	} else {
+		spin_lock(&tcon->tc_lock);
+		if (tcon->status == TID_IN_TCON)
+			tcon->status = TID_GOOD;
+		tcon->need_reconnect = false;
+		spin_unlock(&tcon->tc_lock);
+	}
+
+	return rc;
+}
+#endif
diff --git a/fs/smb/client/dfs.c b/fs/smb/client/dfs.c
new file mode 100644
index 0000000000..a8a1d386da
--- /dev/null
+++ b/fs/smb/client/dfs.c
@@ -0,0 +1,633 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2022 Paulo Alcantara <palcantara@suse.de>
+ */
+
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "dns_resolve.h"
+#include "fs_context.h"
+#include "dfs.h"
+
+/**
+ * dfs_parse_target_referral - set fs context for dfs target referral
+ *
+ * @full_path: full path in UNC format.
+ * @ref: dfs referral pointer.
+ * @ctx: smb3 fs context pointer.
+ *
+ * Return zero if dfs referral was parsed correctly, otherwise non-zero.
+ */
+int dfs_parse_target_referral(const char *full_path, const struct dfs_info3_param *ref,
+			      struct smb3_fs_context *ctx)
+{
+	int rc;
+	const char *prepath = NULL;
+	char *path;
+
+	if (!full_path || !*full_path || !ref || !ctx)
+		return -EINVAL;
+
+	if (WARN_ON_ONCE(!ref->node_name || ref->path_consumed < 0))
+		return -EINVAL;
+
+	if (strlen(full_path) - ref->path_consumed) {
+		prepath = full_path + ref->path_consumed;
+		/* skip initial delimiter */
+		if (*prepath == '/' || *prepath == '\\')
+			prepath++;
+	}
+
+	path = cifs_build_devname(ref->node_name, prepath);
+	if (IS_ERR(path))
+		return PTR_ERR(path);
+
+	rc = smb3_parse_devname(path, ctx);
+	if (rc)
+		goto out;
+
+	rc = dns_resolve_server_name_to_ip(path, (struct sockaddr *)&ctx->dstaddr, NULL);
+
+out:
+	kfree(path);
+	return rc;
+}
+
+static int get_session(struct cifs_mount_ctx *mnt_ctx, const char *full_path)
+{
+	struct smb3_fs_context *ctx = mnt_ctx->fs_ctx;
+	int rc;
+
+	ctx->leaf_fullpath = (char *)full_path;
+	rc = cifs_mount_get_session(mnt_ctx);
+	ctx->leaf_fullpath = NULL;
+
+	return rc;
+}
+
+/*
+ * Track individual DFS referral servers used by new DFS mount.
+ *
+ * On success, their lifetime will be shared by final tcon (dfs_ses_list).
+ * Otherwise, they will be put by dfs_put_root_smb_sessions() in cifs_mount().
+ */
+static int add_root_smb_session(struct cifs_mount_ctx *mnt_ctx)
+{
+	struct smb3_fs_context *ctx = mnt_ctx->fs_ctx;
+	struct dfs_root_ses *root_ses;
+	struct cifs_ses *ses = mnt_ctx->ses;
+
+	if (ses) {
+		root_ses = kmalloc(sizeof(*root_ses), GFP_KERNEL);
+		if (!root_ses)
+			return -ENOMEM;
+
+		INIT_LIST_HEAD(&root_ses->list);
+
+		spin_lock(&cifs_tcp_ses_lock);
+		cifs_smb_ses_inc_refcount(ses);
+		spin_unlock(&cifs_tcp_ses_lock);
+		root_ses->ses = ses;
+		list_add_tail(&root_ses->list, &mnt_ctx->dfs_ses_list);
+	}
+	/* Select new DFS referral server so that new referrals go through it */
+	ctx->dfs_root_ses = ses;
+	return 0;
+}
+
+static inline int parse_dfs_target(struct smb3_fs_context *ctx,
+				   struct dfs_ref_walk *rw,
+				   struct dfs_info3_param *tgt)
+{
+	int rc;
+	const char *fpath = ref_walk_fpath(rw) + 1;
+
+	rc = ref_walk_get_tgt(rw, tgt);
+	if (!rc)
+		rc = dfs_parse_target_referral(fpath, tgt, ctx);
+	return rc;
+}
+
+static int set_ref_paths(struct cifs_mount_ctx *mnt_ctx,
+			 struct dfs_info3_param *tgt,
+			 struct dfs_ref_walk *rw)
+{
+	struct smb3_fs_context *ctx = mnt_ctx->fs_ctx;
+	struct cifs_sb_info *cifs_sb = mnt_ctx->cifs_sb;
+	char *ref_path, *full_path;
+	int rc;
+
+	full_path = smb3_fs_context_fullpath(ctx, CIFS_DIR_SEP(cifs_sb));
+	if (IS_ERR(full_path))
+		return PTR_ERR(full_path);
+
+	if (!tgt || (tgt->server_type == DFS_TYPE_LINK &&
+		     DFS_INTERLINK(tgt->flags)))
+		ref_path = dfs_get_path(cifs_sb, ctx->UNC);
+	else
+		ref_path = dfs_get_path(cifs_sb, full_path);
+	if (IS_ERR(ref_path)) {
+		rc = PTR_ERR(ref_path);
+		kfree(full_path);
+		return rc;
+	}
+	ref_walk_path(rw) = ref_path;
+	ref_walk_fpath(rw) = full_path;
+	return 0;
+}
+
+static int __dfs_referral_walk(struct cifs_mount_ctx *mnt_ctx,
+			       struct dfs_ref_walk *rw)
+{
+	struct smb3_fs_context *ctx = mnt_ctx->fs_ctx;
+	struct dfs_info3_param tgt = {};
+	bool is_refsrv;
+	int rc = -ENOENT;
+
+again:
+	do {
+		if (ref_walk_empty(rw)) {
+			rc = dfs_get_referral(mnt_ctx, ref_walk_path(rw) + 1,
+					      NULL, ref_walk_tl(rw));
+			if (rc) {
+				rc = cifs_mount_get_tcon(mnt_ctx);
+				if (!rc)
+					rc = cifs_is_path_remote(mnt_ctx);
+				continue;
+			}
+			if (!ref_walk_num_tgts(rw)) {
+				rc = -ENOENT;
+				continue;
+			}
+		}
+
+		while (ref_walk_next_tgt(rw)) {
+			rc = parse_dfs_target(ctx, rw, &tgt);
+			if (rc)
+				continue;
+
+			cifs_mount_put_conns(mnt_ctx);
+			rc = get_session(mnt_ctx, ref_walk_path(rw));
+			if (rc)
+				continue;
+
+			is_refsrv = tgt.server_type == DFS_TYPE_ROOT ||
+				DFS_INTERLINK(tgt.flags);
+			ref_walk_set_tgt_hint(rw);
+
+			if (tgt.flags & DFSREF_STORAGE_SERVER) {
+				rc = cifs_mount_get_tcon(mnt_ctx);
+				if (!rc)
+					rc = cifs_is_path_remote(mnt_ctx);
+				if (!rc)
+					break;
+				if (rc != -EREMOTE)
+					continue;
+			}
+
+			if (is_refsrv) {
+				rc = add_root_smb_session(mnt_ctx);
+				if (rc)
+					goto out;
+			}
+
+			rc = ref_walk_advance(rw);
+			if (!rc) {
+				rc = set_ref_paths(mnt_ctx, &tgt, rw);
+				if (!rc) {
+					rc = -EREMOTE;
+					goto again;
+				}
+			}
+			if (rc != -ELOOP)
+				goto out;
+		}
+	} while (rc && ref_walk_descend(rw));
+
+out:
+	free_dfs_info_param(&tgt);
+	return rc;
+}
+
+static int dfs_referral_walk(struct cifs_mount_ctx *mnt_ctx)
+{
+	struct dfs_ref_walk *rw;
+	int rc;
+
+	rw = ref_walk_alloc();
+	if (IS_ERR(rw))
+		return PTR_ERR(rw);
+
+	ref_walk_init(rw);
+	rc = set_ref_paths(mnt_ctx, NULL, rw);
+	if (!rc)
+		rc = __dfs_referral_walk(mnt_ctx, rw);
+	ref_walk_free(rw);
+	return rc;
+}
+
+static int __dfs_mount_share(struct cifs_mount_ctx *mnt_ctx)
+{
+	struct cifs_sb_info *cifs_sb = mnt_ctx->cifs_sb;
+	struct smb3_fs_context *ctx = mnt_ctx->fs_ctx;
+	struct cifs_tcon *tcon;
+	char *origin_fullpath;
+	int rc;
+
+	origin_fullpath = dfs_get_path(cifs_sb, ctx->source);
+	if (IS_ERR(origin_fullpath))
+		return PTR_ERR(origin_fullpath);
+
+	rc = dfs_referral_walk(mnt_ctx);
+	if (rc)
+		goto out;
+
+	tcon = mnt_ctx->tcon;
+	spin_lock(&tcon->tc_lock);
+	if (!tcon->origin_fullpath) {
+		tcon->origin_fullpath = origin_fullpath;
+		origin_fullpath = NULL;
+	}
+	spin_unlock(&tcon->tc_lock);
+
+	if (list_empty(&tcon->dfs_ses_list)) {
+		list_replace_init(&mnt_ctx->dfs_ses_list, &tcon->dfs_ses_list);
+		queue_delayed_work(dfscache_wq, &tcon->dfs_cache_work,
+				   dfs_cache_get_ttl() * HZ);
+	} else {
+		dfs_put_root_smb_sessions(&mnt_ctx->dfs_ses_list);
+	}
+
+out:
+	kfree(origin_fullpath);
+	return rc;
+}
+
+/*
+ * If @ctx->dfs_automount, then update @ctx->dstaddr earlier with the DFS root
+ * server from where we'll start following any referrals.  Otherwise rely on the
+ * value provided by mount(2) as the user might not have dns_resolver key set up
+ * and therefore failing to upcall to resolve UNC hostname under @ctx->source.
+ */
+static int update_fs_context_dstaddr(struct smb3_fs_context *ctx)
+{
+	struct sockaddr *addr = (struct sockaddr *)&ctx->dstaddr;
+	int rc = 0;
+
+	if (!ctx->nodfs && ctx->dfs_automount) {
+		rc = dns_resolve_server_name_to_ip(ctx->source, addr, NULL);
+		if (!rc)
+			cifs_set_port(addr, ctx->port);
+		ctx->dfs_automount = false;
+	}
+	return rc;
+}
+
+int dfs_mount_share(struct cifs_mount_ctx *mnt_ctx, bool *isdfs)
+{
+	struct smb3_fs_context *ctx = mnt_ctx->fs_ctx;
+	bool nodfs = ctx->nodfs;
+	int rc;
+
+	rc = update_fs_context_dstaddr(ctx);
+	if (rc)
+		return rc;
+
+	*isdfs = false;
+	rc = get_session(mnt_ctx, NULL);
+	if (rc)
+		return rc;
+
+	ctx->dfs_root_ses = mnt_ctx->ses;
+	/*
+	 * If called with 'nodfs' mount option, then skip DFS resolving.  Otherwise unconditionally
+	 * try to get an DFS referral (even cached) to determine whether it is an DFS mount.
+	 *
+	 * Skip prefix path to provide support for DFS referrals from w2k8 servers which don't seem
+	 * to respond with PATH_NOT_COVERED to requests that include the prefix.
+	 */
+	if (!nodfs) {
+		rc = dfs_get_referral(mnt_ctx, ctx->UNC + 1, NULL, NULL);
+		if (rc) {
+			cifs_dbg(FYI, "%s: no dfs referral for %s: %d\n",
+				 __func__, ctx->UNC + 1, rc);
+			cifs_dbg(FYI, "%s: assuming non-dfs mount...\n", __func__);
+			nodfs = true;
+		}
+	}
+	if (nodfs) {
+		rc = cifs_mount_get_tcon(mnt_ctx);
+		if (!rc)
+			rc = cifs_is_path_remote(mnt_ctx);
+		return rc;
+	}
+
+	*isdfs = true;
+	add_root_smb_session(mnt_ctx);
+	return __dfs_mount_share(mnt_ctx);
+}
+
+/* Update dfs referral path of superblock */
+static int update_server_fullpath(struct TCP_Server_Info *server, struct cifs_sb_info *cifs_sb,
+				  const char *target)
+{
+	int rc = 0;
+	size_t len = strlen(target);
+	char *refpath, *npath;
+
+	if (unlikely(len < 2 || *target != '\\'))
+		return -EINVAL;
+
+	if (target[1] == '\\') {
+		len += 1;
+		refpath = kmalloc(len, GFP_KERNEL);
+		if (!refpath)
+			return -ENOMEM;
+
+		scnprintf(refpath, len, "%s", target);
+	} else {
+		len += sizeof("\\");
+		refpath = kmalloc(len, GFP_KERNEL);
+		if (!refpath)
+			return -ENOMEM;
+
+		scnprintf(refpath, len, "\\%s", target);
+	}
+
+	npath = dfs_cache_canonical_path(refpath, cifs_sb->local_nls, cifs_remap(cifs_sb));
+	kfree(refpath);
+
+	if (IS_ERR(npath)) {
+		rc = PTR_ERR(npath);
+	} else {
+		mutex_lock(&server->refpath_lock);
+		spin_lock(&server->srv_lock);
+		kfree(server->leaf_fullpath);
+		server->leaf_fullpath = npath;
+		spin_unlock(&server->srv_lock);
+		mutex_unlock(&server->refpath_lock);
+	}
+	return rc;
+}
+
+static int target_share_matches_server(struct TCP_Server_Info *server, char *share,
+				       bool *target_match)
+{
+	int rc = 0;
+	const char *dfs_host;
+	size_t dfs_host_len;
+
+	*target_match = true;
+	extract_unc_hostname(share, &dfs_host, &dfs_host_len);
+
+	/* Check if hostnames or addresses match */
+	cifs_server_lock(server);
+	if (dfs_host_len != strlen(server->hostname) ||
+	    strncasecmp(dfs_host, server->hostname, dfs_host_len)) {
+		cifs_dbg(FYI, "%s: %.*s doesn't match %s\n", __func__,
+			 (int)dfs_host_len, dfs_host, server->hostname);
+		rc = match_target_ip(server, dfs_host, dfs_host_len, target_match);
+		if (rc)
+			cifs_dbg(VFS, "%s: failed to match target ip: %d\n", __func__, rc);
+	}
+	cifs_server_unlock(server);
+	return rc;
+}
+
+static void __tree_connect_ipc(const unsigned int xid, char *tree,
+			       struct cifs_sb_info *cifs_sb,
+			       struct cifs_ses *ses)
+{
+	struct TCP_Server_Info *server = ses->server;
+	struct cifs_tcon *tcon = ses->tcon_ipc;
+	int rc;
+
+	spin_lock(&ses->ses_lock);
+	spin_lock(&ses->chan_lock);
+	if (cifs_chan_needs_reconnect(ses, server) ||
+	    ses->ses_status != SES_GOOD) {
+		spin_unlock(&ses->chan_lock);
+		spin_unlock(&ses->ses_lock);
+		cifs_server_dbg(FYI, "%s: skipping ipc reconnect due to disconnected ses\n",
+				__func__);
+		return;
+	}
+	spin_unlock(&ses->chan_lock);
+	spin_unlock(&ses->ses_lock);
+
+	cifs_server_lock(server);
+	scnprintf(tree, MAX_TREE_SIZE, "\\\\%s\\IPC$", server->hostname);
+	cifs_server_unlock(server);
+
+	rc = server->ops->tree_connect(xid, ses, tree, tcon,
+				       cifs_sb->local_nls);
+	cifs_server_dbg(FYI, "%s: tree_reconnect %s: %d\n", __func__, tree, rc);
+	spin_lock(&tcon->tc_lock);
+	if (rc) {
+		tcon->status = TID_NEED_TCON;
+	} else {
+		tcon->status = TID_GOOD;
+		tcon->need_reconnect = false;
+	}
+	spin_unlock(&tcon->tc_lock);
+}
+
+static void tree_connect_ipc(const unsigned int xid, char *tree,
+			     struct cifs_sb_info *cifs_sb,
+			     struct cifs_tcon *tcon)
+{
+	struct cifs_ses *ses = tcon->ses;
+
+	__tree_connect_ipc(xid, tree, cifs_sb, ses);
+	__tree_connect_ipc(xid, tree, cifs_sb, CIFS_DFS_ROOT_SES(ses));
+}
+
+static int __tree_connect_dfs_target(const unsigned int xid, struct cifs_tcon *tcon,
+				     struct cifs_sb_info *cifs_sb, char *tree, bool islink,
+				     struct dfs_cache_tgt_list *tl)
+{
+	int rc;
+	struct TCP_Server_Info *server = tcon->ses->server;
+	const struct smb_version_operations *ops = server->ops;
+	struct cifs_ses *root_ses = CIFS_DFS_ROOT_SES(tcon->ses);
+	char *share = NULL, *prefix = NULL;
+	struct dfs_cache_tgt_iterator *tit;
+	bool target_match;
+
+	tit = dfs_cache_get_tgt_iterator(tl);
+	if (!tit) {
+		rc = -ENOENT;
+		goto out;
+	}
+
+	/* Try to tree connect to all dfs targets */
+	for (; tit; tit = dfs_cache_get_next_tgt(tl, tit)) {
+		const char *target = dfs_cache_get_tgt_name(tit);
+		DFS_CACHE_TGT_LIST(ntl);
+
+		kfree(share);
+		kfree(prefix);
+		share = prefix = NULL;
+
+		/* Check if share matches with tcp ses */
+		rc = dfs_cache_get_tgt_share(server->leaf_fullpath + 1, tit, &share, &prefix);
+		if (rc) {
+			cifs_dbg(VFS, "%s: failed to parse target share: %d\n", __func__, rc);
+			break;
+		}
+
+		rc = target_share_matches_server(server, share, &target_match);
+		if (rc)
+			break;
+		if (!target_match) {
+			rc = -EHOSTUNREACH;
+			continue;
+		}
+
+		dfs_cache_noreq_update_tgthint(server->leaf_fullpath + 1, tit);
+		tree_connect_ipc(xid, tree, cifs_sb, tcon);
+
+		scnprintf(tree, MAX_TREE_SIZE, "\\%s", share);
+		if (!islink) {
+			rc = ops->tree_connect(xid, tcon->ses, tree, tcon, cifs_sb->local_nls);
+			break;
+		}
+
+		/*
+		 * If no dfs referrals were returned from link target, then just do a TREE_CONNECT
+		 * to it.  Otherwise, cache the dfs referral and then mark current tcp ses for
+		 * reconnect so either the demultiplex thread or the echo worker will reconnect to
+		 * newly resolved target.
+		 */
+		if (dfs_cache_find(xid, root_ses, cifs_sb->local_nls, cifs_remap(cifs_sb), target,
+				   NULL, &ntl)) {
+			rc = ops->tree_connect(xid, tcon->ses, tree, tcon, cifs_sb->local_nls);
+			if (rc)
+				continue;
+
+			rc = cifs_update_super_prepath(cifs_sb, prefix);
+		} else {
+			/* Target is another dfs share */
+			rc = update_server_fullpath(server, cifs_sb, target);
+			dfs_cache_free_tgts(tl);
+
+			if (!rc) {
+				rc = -EREMOTE;
+				list_replace_init(&ntl.tl_list, &tl->tl_list);
+			} else
+				dfs_cache_free_tgts(&ntl);
+		}
+		break;
+	}
+
+out:
+	kfree(share);
+	kfree(prefix);
+
+	return rc;
+}
+
+static int tree_connect_dfs_target(const unsigned int xid, struct cifs_tcon *tcon,
+				   struct cifs_sb_info *cifs_sb, char *tree, bool islink,
+				   struct dfs_cache_tgt_list *tl)
+{
+	int rc;
+	int num_links = 0;
+	struct TCP_Server_Info *server = tcon->ses->server;
+	char *old_fullpath = server->leaf_fullpath;
+
+	do {
+		rc = __tree_connect_dfs_target(xid, tcon, cifs_sb, tree, islink, tl);
+		if (!rc || rc != -EREMOTE)
+			break;
+	} while (rc = -ELOOP, ++num_links < MAX_NESTED_LINKS);
+	/*
+	 * If we couldn't tree connect to any targets from last referral path, then
+	 * retry it from newly resolved dfs referral.
+	 */
+	if (rc && server->leaf_fullpath != old_fullpath)
+		cifs_signal_cifsd_for_reconnect(server, true);
+
+	dfs_cache_free_tgts(tl);
+	return rc;
+}
+
+int cifs_tree_connect(const unsigned int xid, struct cifs_tcon *tcon, const struct nls_table *nlsc)
+{
+	int rc;
+	struct TCP_Server_Info *server = tcon->ses->server;
+	const struct smb_version_operations *ops = server->ops;
+	DFS_CACHE_TGT_LIST(tl);
+	struct cifs_sb_info *cifs_sb = NULL;
+	struct super_block *sb = NULL;
+	struct dfs_info3_param ref = {0};
+	char *tree;
+
+	/* only send once per connect */
+	spin_lock(&tcon->tc_lock);
+	if (tcon->status == TID_GOOD) {
+		spin_unlock(&tcon->tc_lock);
+		return 0;
+	}
+
+	if (tcon->status != TID_NEW &&
+	    tcon->status != TID_NEED_TCON) {
+		spin_unlock(&tcon->tc_lock);
+		return -EHOSTDOWN;
+	}
+
+	tcon->status = TID_IN_TCON;
+	spin_unlock(&tcon->tc_lock);
+
+	tree = kzalloc(MAX_TREE_SIZE, GFP_KERNEL);
+	if (!tree) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	if (tcon->ipc) {
+		cifs_server_lock(server);
+		scnprintf(tree, MAX_TREE_SIZE, "\\\\%s\\IPC$", server->hostname);
+		cifs_server_unlock(server);
+		rc = ops->tree_connect(xid, tcon->ses, tree, tcon, nlsc);
+		goto out;
+	}
+
+	sb = cifs_get_dfs_tcon_super(tcon);
+	if (!IS_ERR(sb))
+		cifs_sb = CIFS_SB(sb);
+
+	/*
+	 * Tree connect to last share in @tcon->tree_name whether dfs super or
+	 * cached dfs referral was not found.
+	 */
+	if (!cifs_sb || !server->leaf_fullpath ||
+	    dfs_cache_noreq_find(server->leaf_fullpath + 1, &ref, &tl)) {
+		rc = ops->tree_connect(xid, tcon->ses, tcon->tree_name, tcon,
+				       cifs_sb ? cifs_sb->local_nls : nlsc);
+		goto out;
+	}
+
+	rc = tree_connect_dfs_target(xid, tcon, cifs_sb, tree, ref.server_type == DFS_TYPE_LINK,
+				     &tl);
+	free_dfs_info_param(&ref);
+
+out:
+	kfree(tree);
+	cifs_put_tcp_super(sb);
+
+	if (rc) {
+		spin_lock(&tcon->tc_lock);
+		if (tcon->status == TID_IN_TCON)
+			tcon->status = TID_NEED_TCON;
+		spin_unlock(&tcon->tc_lock);
+	} else {
+		spin_lock(&tcon->tc_lock);
+		if (tcon->status == TID_IN_TCON)
+			tcon->status = TID_GOOD;
+		spin_unlock(&tcon->tc_lock);
+		tcon->need_reconnect = false;
+	}
+
+	return rc;
+}
diff --git a/fs/smb/client/dfs.h b/fs/smb/client/dfs.h
new file mode 100644
index 0000000000..875ab7ae57
--- /dev/null
+++ b/fs/smb/client/dfs.h
@@ -0,0 +1,152 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2022 Paulo Alcantara <palcantara@suse.de>
+ */
+
+#ifndef _CIFS_DFS_H
+#define _CIFS_DFS_H
+
+#include "cifsglob.h"
+#include "fs_context.h"
+#include "cifs_unicode.h"
+#include <linux/namei.h>
+
+#define DFS_INTERLINK(v) \
+	(((v) & DFSREF_REFERRAL_SERVER) && !((v) & DFSREF_STORAGE_SERVER))
+
+struct dfs_ref {
+	char *path;
+	char *full_path;
+	struct dfs_cache_tgt_list tl;
+	struct dfs_cache_tgt_iterator *tit;
+};
+
+struct dfs_ref_walk {
+	struct dfs_ref *ref;
+	struct dfs_ref refs[MAX_NESTED_LINKS];
+};
+
+#define ref_walk_start(w)	((w)->refs)
+#define ref_walk_end(w)	(&(w)->refs[ARRAY_SIZE((w)->refs) - 1])
+#define ref_walk_cur(w)	((w)->ref)
+#define ref_walk_descend(w)	(--ref_walk_cur(w) >= ref_walk_start(w))
+
+#define ref_walk_tit(w)	(ref_walk_cur(w)->tit)
+#define ref_walk_empty(w)	(!ref_walk_tit(w))
+#define ref_walk_path(w)	(ref_walk_cur(w)->path)
+#define ref_walk_fpath(w)	(ref_walk_cur(w)->full_path)
+#define ref_walk_tl(w)		(&ref_walk_cur(w)->tl)
+
+static inline struct dfs_ref_walk *ref_walk_alloc(void)
+{
+	struct dfs_ref_walk *rw;
+
+	rw = kmalloc(sizeof(*rw), GFP_KERNEL);
+	if (!rw)
+		return ERR_PTR(-ENOMEM);
+	return rw;
+}
+
+static inline void ref_walk_init(struct dfs_ref_walk *rw)
+{
+	memset(rw, 0, sizeof(*rw));
+	ref_walk_cur(rw) = ref_walk_start(rw);
+}
+
+static inline void __ref_walk_free(struct dfs_ref *ref)
+{
+	kfree(ref->path);
+	kfree(ref->full_path);
+	dfs_cache_free_tgts(&ref->tl);
+	memset(ref, 0, sizeof(*ref));
+}
+
+static inline void ref_walk_free(struct dfs_ref_walk *rw)
+{
+	struct dfs_ref *ref = ref_walk_start(rw);
+
+	for (; ref <= ref_walk_end(rw); ref++)
+		__ref_walk_free(ref);
+	kfree(rw);
+}
+
+static inline int ref_walk_advance(struct dfs_ref_walk *rw)
+{
+	struct dfs_ref *ref = ref_walk_cur(rw) + 1;
+
+	if (ref > ref_walk_end(rw))
+		return -ELOOP;
+	__ref_walk_free(ref);
+	ref_walk_cur(rw) = ref;
+	return 0;
+}
+
+static inline struct dfs_cache_tgt_iterator *
+ref_walk_next_tgt(struct dfs_ref_walk *rw)
+{
+	struct dfs_cache_tgt_iterator *tit;
+	struct dfs_ref *ref = ref_walk_cur(rw);
+
+	if (!ref->tit)
+		tit = dfs_cache_get_tgt_iterator(&ref->tl);
+	else
+		tit = dfs_cache_get_next_tgt(&ref->tl, ref->tit);
+	ref->tit = tit;
+	return tit;
+}
+
+static inline int ref_walk_get_tgt(struct dfs_ref_walk *rw,
+				   struct dfs_info3_param *tgt)
+{
+	zfree_dfs_info_param(tgt);
+	return dfs_cache_get_tgt_referral(ref_walk_path(rw) + 1,
+					  ref_walk_tit(rw), tgt);
+}
+
+static inline int ref_walk_num_tgts(struct dfs_ref_walk *rw)
+{
+	return dfs_cache_get_nr_tgts(ref_walk_tl(rw));
+}
+
+static inline void ref_walk_set_tgt_hint(struct dfs_ref_walk *rw)
+{
+	dfs_cache_noreq_update_tgthint(ref_walk_path(rw) + 1,
+				       ref_walk_tit(rw));
+}
+
+struct dfs_root_ses {
+	struct list_head list;
+	struct cifs_ses *ses;
+};
+
+int dfs_parse_target_referral(const char *full_path, const struct dfs_info3_param *ref,
+			      struct smb3_fs_context *ctx);
+int dfs_mount_share(struct cifs_mount_ctx *mnt_ctx, bool *isdfs);
+
+static inline char *dfs_get_path(struct cifs_sb_info *cifs_sb, const char *path)
+{
+	return dfs_cache_canonical_path(path, cifs_sb->local_nls, cifs_remap(cifs_sb));
+}
+
+static inline int dfs_get_referral(struct cifs_mount_ctx *mnt_ctx, const char *path,
+				   struct dfs_info3_param *ref, struct dfs_cache_tgt_list *tl)
+{
+	struct smb3_fs_context *ctx = mnt_ctx->fs_ctx;
+	struct cifs_sb_info *cifs_sb = mnt_ctx->cifs_sb;
+
+	return dfs_cache_find(mnt_ctx->xid, ctx->dfs_root_ses, cifs_sb->local_nls,
+			      cifs_remap(cifs_sb), path, ref, tl);
+}
+
+static inline void dfs_put_root_smb_sessions(struct list_head *head)
+{
+	struct dfs_root_ses *root, *tmp;
+
+	list_for_each_entry_safe(root, tmp, head, list) {
+		list_del_init(&root->list);
+		cifs_put_smb_ses(root->ses);
+		kfree(root);
+	}
+}
+
+#endif /* _CIFS_DFS_H */
diff --git a/fs/smb/client/dfs_cache.c b/fs/smb/client/dfs_cache.c
new file mode 100644
index 0000000000..508d831fab
--- /dev/null
+++ b/fs/smb/client/dfs_cache.c
@@ -0,0 +1,1305 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * DFS referral cache routines
+ *
+ * Copyright (c) 2018-2019 Paulo Alcantara <palcantara@suse.de>
+ */
+
+#include <linux/jhash.h>
+#include <linux/ktime.h>
+#include <linux/slab.h>
+#include <linux/proc_fs.h>
+#include <linux/nls.h>
+#include <linux/workqueue.h>
+#include <linux/uuid.h>
+#include "cifsglob.h"
+#include "smb2pdu.h"
+#include "smb2proto.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifs_unicode.h"
+#include "smb2glob.h"
+#include "dns_resolve.h"
+#include "dfs.h"
+
+#include "dfs_cache.h"
+
+#define CACHE_HTABLE_SIZE	32
+#define CACHE_MAX_ENTRIES	64
+#define CACHE_MIN_TTL		120 /* 2 minutes */
+#define CACHE_DEFAULT_TTL	300 /* 5 minutes */
+
+struct cache_dfs_tgt {
+	char *name;
+	int path_consumed;
+	struct list_head list;
+};
+
+struct cache_entry {
+	struct hlist_node hlist;
+	const char *path;
+	int hdr_flags; /* RESP_GET_DFS_REFERRAL.ReferralHeaderFlags */
+	int ttl; /* DFS_REREFERRAL_V3.TimeToLive */
+	int srvtype; /* DFS_REREFERRAL_V3.ServerType */
+	int ref_flags; /* DFS_REREFERRAL_V3.ReferralEntryFlags */
+	struct timespec64 etime;
+	int path_consumed; /* RESP_GET_DFS_REFERRAL.PathConsumed */
+	int numtgts;
+	struct list_head tlist;
+	struct cache_dfs_tgt *tgthint;
+};
+
+static struct kmem_cache *cache_slab __read_mostly;
+struct workqueue_struct *dfscache_wq;
+
+atomic_t dfs_cache_ttl;
+
+static struct nls_table *cache_cp;
+
+/*
+ * Number of entries in the cache
+ */
+static atomic_t cache_count;
+
+static struct hlist_head cache_htable[CACHE_HTABLE_SIZE];
+static DECLARE_RWSEM(htable_rw_lock);
+
+/**
+ * dfs_cache_canonical_path - get a canonical DFS path
+ *
+ * @path: DFS path
+ * @cp: codepage
+ * @remap: mapping type
+ *
+ * Return canonical path if success, otherwise error.
+ */
+char *dfs_cache_canonical_path(const char *path, const struct nls_table *cp, int remap)
+{
+	char *tmp;
+	int plen = 0;
+	char *npath;
+
+	if (!path || strlen(path) < 3 || (*path != '\\' && *path != '/'))
+		return ERR_PTR(-EINVAL);
+
+	if (unlikely(strcmp(cp->charset, cache_cp->charset))) {
+		tmp = (char *)cifs_strndup_to_utf16(path, strlen(path), &plen, cp, remap);
+		if (!tmp) {
+			cifs_dbg(VFS, "%s: failed to convert path to utf16\n", __func__);
+			return ERR_PTR(-EINVAL);
+		}
+
+		npath = cifs_strndup_from_utf16(tmp, plen, true, cache_cp);
+		kfree(tmp);
+
+		if (!npath) {
+			cifs_dbg(VFS, "%s: failed to convert path from utf16\n", __func__);
+			return ERR_PTR(-EINVAL);
+		}
+	} else {
+		npath = kstrdup(path, GFP_KERNEL);
+		if (!npath)
+			return ERR_PTR(-ENOMEM);
+	}
+	convert_delimiter(npath, '\\');
+	return npath;
+}
+
+static inline bool cache_entry_expired(const struct cache_entry *ce)
+{
+	struct timespec64 ts;
+
+	ktime_get_coarse_real_ts64(&ts);
+	return timespec64_compare(&ts, &ce->etime) >= 0;
+}
+
+static inline void free_tgts(struct cache_entry *ce)
+{
+	struct cache_dfs_tgt *t, *n;
+
+	list_for_each_entry_safe(t, n, &ce->tlist, list) {
+		list_del(&t->list);
+		kfree(t->name);
+		kfree(t);
+	}
+}
+
+static inline void flush_cache_ent(struct cache_entry *ce)
+{
+	hlist_del_init(&ce->hlist);
+	kfree(ce->path);
+	free_tgts(ce);
+	atomic_dec(&cache_count);
+	kmem_cache_free(cache_slab, ce);
+}
+
+static void flush_cache_ents(void)
+{
+	int i;
+
+	for (i = 0; i < CACHE_HTABLE_SIZE; i++) {
+		struct hlist_head *l = &cache_htable[i];
+		struct hlist_node *n;
+		struct cache_entry *ce;
+
+		hlist_for_each_entry_safe(ce, n, l, hlist) {
+			if (!hlist_unhashed(&ce->hlist))
+				flush_cache_ent(ce);
+		}
+	}
+}
+
+/*
+ * dfs cache /proc file
+ */
+static int dfscache_proc_show(struct seq_file *m, void *v)
+{
+	int i;
+	struct cache_entry *ce;
+	struct cache_dfs_tgt *t;
+
+	seq_puts(m, "DFS cache\n---------\n");
+
+	down_read(&htable_rw_lock);
+	for (i = 0; i < CACHE_HTABLE_SIZE; i++) {
+		struct hlist_head *l = &cache_htable[i];
+
+		hlist_for_each_entry(ce, l, hlist) {
+			if (hlist_unhashed(&ce->hlist))
+				continue;
+
+			seq_printf(m,
+				   "cache entry: path=%s,type=%s,ttl=%d,etime=%ld,hdr_flags=0x%x,ref_flags=0x%x,interlink=%s,path_consumed=%d,expired=%s\n",
+				   ce->path, ce->srvtype == DFS_TYPE_ROOT ? "root" : "link",
+				   ce->ttl, ce->etime.tv_nsec, ce->hdr_flags, ce->ref_flags,
+				   DFS_INTERLINK(ce->hdr_flags) ? "yes" : "no",
+				   ce->path_consumed, cache_entry_expired(ce) ? "yes" : "no");
+
+			list_for_each_entry(t, &ce->tlist, list) {
+				seq_printf(m, "  %s%s\n",
+					   t->name,
+					   READ_ONCE(ce->tgthint) == t ? " (target hint)" : "");
+			}
+		}
+	}
+	up_read(&htable_rw_lock);
+
+	return 0;
+}
+
+static ssize_t dfscache_proc_write(struct file *file, const char __user *buffer,
+				   size_t count, loff_t *ppos)
+{
+	char c;
+	int rc;
+
+	rc = get_user(c, buffer);
+	if (rc)
+		return rc;
+
+	if (c != '0')
+		return -EINVAL;
+
+	cifs_dbg(FYI, "clearing dfs cache\n");
+
+	down_write(&htable_rw_lock);
+	flush_cache_ents();
+	up_write(&htable_rw_lock);
+
+	return count;
+}
+
+static int dfscache_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, dfscache_proc_show, NULL);
+}
+
+const struct proc_ops dfscache_proc_ops = {
+	.proc_open	= dfscache_proc_open,
+	.proc_read	= seq_read,
+	.proc_lseek	= seq_lseek,
+	.proc_release	= single_release,
+	.proc_write	= dfscache_proc_write,
+};
+
+#ifdef CONFIG_CIFS_DEBUG2
+static inline void dump_tgts(const struct cache_entry *ce)
+{
+	struct cache_dfs_tgt *t;
+
+	cifs_dbg(FYI, "target list:\n");
+	list_for_each_entry(t, &ce->tlist, list) {
+		cifs_dbg(FYI, "  %s%s\n", t->name,
+			 READ_ONCE(ce->tgthint) == t ? " (target hint)" : "");
+	}
+}
+
+static inline void dump_ce(const struct cache_entry *ce)
+{
+	cifs_dbg(FYI, "cache entry: path=%s,type=%s,ttl=%d,etime=%ld,hdr_flags=0x%x,ref_flags=0x%x,interlink=%s,path_consumed=%d,expired=%s\n",
+		 ce->path,
+		 ce->srvtype == DFS_TYPE_ROOT ? "root" : "link", ce->ttl,
+		 ce->etime.tv_nsec,
+		 ce->hdr_flags, ce->ref_flags,
+		 DFS_INTERLINK(ce->hdr_flags) ? "yes" : "no",
+		 ce->path_consumed,
+		 cache_entry_expired(ce) ? "yes" : "no");
+	dump_tgts(ce);
+}
+
+static inline void dump_refs(const struct dfs_info3_param *refs, int numrefs)
+{
+	int i;
+
+	cifs_dbg(FYI, "DFS referrals returned by the server:\n");
+	for (i = 0; i < numrefs; i++) {
+		const struct dfs_info3_param *ref = &refs[i];
+
+		cifs_dbg(FYI,
+			 "\n"
+			 "flags:         0x%x\n"
+			 "path_consumed: %d\n"
+			 "server_type:   0x%x\n"
+			 "ref_flag:      0x%x\n"
+			 "path_name:     %s\n"
+			 "node_name:     %s\n"
+			 "ttl:           %d (%dm)\n",
+			 ref->flags, ref->path_consumed, ref->server_type,
+			 ref->ref_flag, ref->path_name, ref->node_name,
+			 ref->ttl, ref->ttl / 60);
+	}
+}
+#else
+#define dump_tgts(e)
+#define dump_ce(e)
+#define dump_refs(r, n)
+#endif
+
+/**
+ * dfs_cache_init - Initialize DFS referral cache.
+ *
+ * Return zero if initialized successfully, otherwise non-zero.
+ */
+int dfs_cache_init(void)
+{
+	int rc;
+	int i;
+
+	dfscache_wq = alloc_workqueue("cifs-dfscache",
+				      WQ_UNBOUND|WQ_FREEZABLE|WQ_MEM_RECLAIM,
+				      0);
+	if (!dfscache_wq)
+		return -ENOMEM;
+
+	cache_slab = kmem_cache_create("cifs_dfs_cache",
+				       sizeof(struct cache_entry), 0,
+				       SLAB_HWCACHE_ALIGN, NULL);
+	if (!cache_slab) {
+		rc = -ENOMEM;
+		goto out_destroy_wq;
+	}
+
+	for (i = 0; i < CACHE_HTABLE_SIZE; i++)
+		INIT_HLIST_HEAD(&cache_htable[i]);
+
+	atomic_set(&cache_count, 0);
+	atomic_set(&dfs_cache_ttl, CACHE_DEFAULT_TTL);
+	cache_cp = load_nls("utf8");
+	if (!cache_cp)
+		cache_cp = load_nls_default();
+
+	cifs_dbg(FYI, "%s: initialized DFS referral cache\n", __func__);
+	return 0;
+
+out_destroy_wq:
+	destroy_workqueue(dfscache_wq);
+	return rc;
+}
+
+static int cache_entry_hash(const void *data, int size, unsigned int *hash)
+{
+	int i, clen;
+	const unsigned char *s = data;
+	wchar_t c;
+	unsigned int h = 0;
+
+	for (i = 0; i < size; i += clen) {
+		clen = cache_cp->char2uni(&s[i], size - i, &c);
+		if (unlikely(clen < 0)) {
+			cifs_dbg(VFS, "%s: can't convert char\n", __func__);
+			return clen;
+		}
+		c = cifs_toupper(c);
+		h = jhash(&c, sizeof(c), h);
+	}
+	*hash = h % CACHE_HTABLE_SIZE;
+	return 0;
+}
+
+/* Return target hint of a DFS cache entry */
+static inline char *get_tgt_name(const struct cache_entry *ce)
+{
+	struct cache_dfs_tgt *t = READ_ONCE(ce->tgthint);
+
+	return t ? t->name : ERR_PTR(-ENOENT);
+}
+
+/* Return expire time out of a new entry's TTL */
+static inline struct timespec64 get_expire_time(int ttl)
+{
+	struct timespec64 ts = {
+		.tv_sec = ttl,
+		.tv_nsec = 0,
+	};
+	struct timespec64 now;
+
+	ktime_get_coarse_real_ts64(&now);
+	return timespec64_add(now, ts);
+}
+
+/* Allocate a new DFS target */
+static struct cache_dfs_tgt *alloc_target(const char *name, int path_consumed)
+{
+	struct cache_dfs_tgt *t;
+
+	t = kmalloc(sizeof(*t), GFP_ATOMIC);
+	if (!t)
+		return ERR_PTR(-ENOMEM);
+	t->name = kstrdup(name, GFP_ATOMIC);
+	if (!t->name) {
+		kfree(t);
+		return ERR_PTR(-ENOMEM);
+	}
+	t->path_consumed = path_consumed;
+	INIT_LIST_HEAD(&t->list);
+	return t;
+}
+
+/*
+ * Copy DFS referral information to a cache entry and conditionally update
+ * target hint.
+ */
+static int copy_ref_data(const struct dfs_info3_param *refs, int numrefs,
+			 struct cache_entry *ce, const char *tgthint)
+{
+	struct cache_dfs_tgt *target;
+	int i;
+
+	ce->ttl = max_t(int, refs[0].ttl, CACHE_MIN_TTL);
+	ce->etime = get_expire_time(ce->ttl);
+	ce->srvtype = refs[0].server_type;
+	ce->hdr_flags = refs[0].flags;
+	ce->ref_flags = refs[0].ref_flag;
+	ce->path_consumed = refs[0].path_consumed;
+
+	for (i = 0; i < numrefs; i++) {
+		struct cache_dfs_tgt *t;
+
+		t = alloc_target(refs[i].node_name, refs[i].path_consumed);
+		if (IS_ERR(t)) {
+			free_tgts(ce);
+			return PTR_ERR(t);
+		}
+		if (tgthint && !strcasecmp(t->name, tgthint)) {
+			list_add(&t->list, &ce->tlist);
+			tgthint = NULL;
+		} else {
+			list_add_tail(&t->list, &ce->tlist);
+		}
+		ce->numtgts++;
+	}
+
+	target = list_first_entry_or_null(&ce->tlist, struct cache_dfs_tgt,
+					  list);
+	WRITE_ONCE(ce->tgthint, target);
+
+	return 0;
+}
+
+/* Allocate a new cache entry */
+static struct cache_entry *alloc_cache_entry(struct dfs_info3_param *refs, int numrefs)
+{
+	struct cache_entry *ce;
+	int rc;
+
+	ce = kmem_cache_zalloc(cache_slab, GFP_KERNEL);
+	if (!ce)
+		return ERR_PTR(-ENOMEM);
+
+	ce->path = refs[0].path_name;
+	refs[0].path_name = NULL;
+
+	INIT_HLIST_NODE(&ce->hlist);
+	INIT_LIST_HEAD(&ce->tlist);
+
+	rc = copy_ref_data(refs, numrefs, ce, NULL);
+	if (rc) {
+		kfree(ce->path);
+		kmem_cache_free(cache_slab, ce);
+		ce = ERR_PTR(rc);
+	}
+	return ce;
+}
+
+static void remove_oldest_entry_locked(void)
+{
+	int i;
+	struct cache_entry *ce;
+	struct cache_entry *to_del = NULL;
+
+	WARN_ON(!rwsem_is_locked(&htable_rw_lock));
+
+	for (i = 0; i < CACHE_HTABLE_SIZE; i++) {
+		struct hlist_head *l = &cache_htable[i];
+
+		hlist_for_each_entry(ce, l, hlist) {
+			if (hlist_unhashed(&ce->hlist))
+				continue;
+			if (!to_del || timespec64_compare(&ce->etime,
+							  &to_del->etime) < 0)
+				to_del = ce;
+		}
+	}
+
+	if (!to_del) {
+		cifs_dbg(FYI, "%s: no entry to remove\n", __func__);
+		return;
+	}
+
+	cifs_dbg(FYI, "%s: removing entry\n", __func__);
+	dump_ce(to_del);
+	flush_cache_ent(to_del);
+}
+
+/* Add a new DFS cache entry */
+static struct cache_entry *add_cache_entry_locked(struct dfs_info3_param *refs,
+						  int numrefs)
+{
+	int rc;
+	struct cache_entry *ce;
+	unsigned int hash;
+	int ttl;
+
+	WARN_ON(!rwsem_is_locked(&htable_rw_lock));
+
+	if (atomic_read(&cache_count) >= CACHE_MAX_ENTRIES) {
+		cifs_dbg(FYI, "%s: reached max cache size (%d)\n", __func__, CACHE_MAX_ENTRIES);
+		remove_oldest_entry_locked();
+	}
+
+	rc = cache_entry_hash(refs[0].path_name, strlen(refs[0].path_name), &hash);
+	if (rc)
+		return ERR_PTR(rc);
+
+	ce = alloc_cache_entry(refs, numrefs);
+	if (IS_ERR(ce))
+		return ce;
+
+	ttl = min_t(int, atomic_read(&dfs_cache_ttl), ce->ttl);
+	atomic_set(&dfs_cache_ttl, ttl);
+
+	hlist_add_head(&ce->hlist, &cache_htable[hash]);
+	dump_ce(ce);
+
+	atomic_inc(&cache_count);
+
+	return ce;
+}
+
+/* Check if two DFS paths are equal.  @s1 and @s2 are expected to be in @cache_cp's charset */
+static bool dfs_path_equal(const char *s1, int len1, const char *s2, int len2)
+{
+	int i, l1, l2;
+	wchar_t c1, c2;
+
+	if (len1 != len2)
+		return false;
+
+	for (i = 0; i < len1; i += l1) {
+		l1 = cache_cp->char2uni(&s1[i], len1 - i, &c1);
+		l2 = cache_cp->char2uni(&s2[i], len2 - i, &c2);
+		if (unlikely(l1 < 0 && l2 < 0)) {
+			if (s1[i] != s2[i])
+				return false;
+			l1 = 1;
+			continue;
+		}
+		if (l1 != l2)
+			return false;
+		if (cifs_toupper(c1) != cifs_toupper(c2))
+			return false;
+	}
+	return true;
+}
+
+static struct cache_entry *__lookup_cache_entry(const char *path, unsigned int hash, int len)
+{
+	struct cache_entry *ce;
+
+	hlist_for_each_entry(ce, &cache_htable[hash], hlist) {
+		if (dfs_path_equal(ce->path, strlen(ce->path), path, len)) {
+			dump_ce(ce);
+			return ce;
+		}
+	}
+	return ERR_PTR(-ENOENT);
+}
+
+/*
+ * Find a DFS cache entry in hash table and optionally check prefix path against normalized @path.
+ *
+ * Use whole path components in the match.  Must be called with htable_rw_lock held.
+ *
+ * Return cached entry if successful.
+ * Return ERR_PTR(-ENOENT) if the entry is not found.
+ * Return error ptr otherwise.
+ */
+static struct cache_entry *lookup_cache_entry(const char *path)
+{
+	struct cache_entry *ce;
+	int cnt = 0;
+	const char *s = path, *e;
+	char sep = *s;
+	unsigned int hash;
+	int rc;
+
+	while ((s = strchr(s, sep)) && ++cnt < 3)
+		s++;
+
+	if (cnt < 3) {
+		rc = cache_entry_hash(path, strlen(path), &hash);
+		if (rc)
+			return ERR_PTR(rc);
+		return __lookup_cache_entry(path, hash, strlen(path));
+	}
+	/*
+	 * Handle paths that have more than two path components and are a complete prefix of the DFS
+	 * referral request path (@path).
+	 *
+	 * See MS-DFSC 3.2.5.5 "Receiving a Root Referral Request or Link Referral Request".
+	 */
+	e = path + strlen(path) - 1;
+	while (e > s) {
+		int len;
+
+		/* skip separators */
+		while (e > s && *e == sep)
+			e--;
+		if (e == s)
+			break;
+
+		len = e + 1 - path;
+		rc = cache_entry_hash(path, len, &hash);
+		if (rc)
+			return ERR_PTR(rc);
+		ce = __lookup_cache_entry(path, hash, len);
+		if (!IS_ERR(ce))
+			return ce;
+
+		/* backward until separator */
+		while (e > s && *e != sep)
+			e--;
+	}
+	return ERR_PTR(-ENOENT);
+}
+
+/**
+ * dfs_cache_destroy - destroy DFS referral cache
+ */
+void dfs_cache_destroy(void)
+{
+	unload_nls(cache_cp);
+	flush_cache_ents();
+	kmem_cache_destroy(cache_slab);
+	destroy_workqueue(dfscache_wq);
+
+	cifs_dbg(FYI, "%s: destroyed DFS referral cache\n", __func__);
+}
+
+/* Update a cache entry with the new referral in @refs */
+static int update_cache_entry_locked(struct cache_entry *ce, const struct dfs_info3_param *refs,
+				     int numrefs)
+{
+	struct cache_dfs_tgt *target;
+	char *th = NULL;
+	int rc;
+
+	WARN_ON(!rwsem_is_locked(&htable_rw_lock));
+
+	target = READ_ONCE(ce->tgthint);
+	if (target) {
+		th = kstrdup(target->name, GFP_ATOMIC);
+		if (!th)
+			return -ENOMEM;
+	}
+
+	free_tgts(ce);
+	ce->numtgts = 0;
+
+	rc = copy_ref_data(refs, numrefs, ce, th);
+
+	kfree(th);
+
+	return rc;
+}
+
+static int get_dfs_referral(const unsigned int xid, struct cifs_ses *ses, const char *path,
+			    struct dfs_info3_param **refs, int *numrefs)
+{
+	int rc;
+	int i;
+
+	*refs = NULL;
+	*numrefs = 0;
+
+	if (!ses || !ses->server || !ses->server->ops->get_dfs_refer)
+		return -EOPNOTSUPP;
+	if (unlikely(!cache_cp))
+		return -EINVAL;
+
+	cifs_dbg(FYI, "%s: ipc=%s referral=%s\n", __func__, ses->tcon_ipc->tree_name, path);
+	rc =  ses->server->ops->get_dfs_refer(xid, ses, path, refs, numrefs, cache_cp,
+					      NO_MAP_UNI_RSVD);
+	if (!rc) {
+		struct dfs_info3_param *ref = *refs;
+
+		for (i = 0; i < *numrefs; i++)
+			convert_delimiter(ref[i].path_name, '\\');
+	}
+	return rc;
+}
+
+/*
+ * Find, create or update a DFS cache entry.
+ *
+ * If the entry wasn't found, it will create a new one. Or if it was found but
+ * expired, then it will update the entry accordingly.
+ *
+ * For interlinks, cifs_mount() and expand_dfs_referral() are supposed to
+ * handle them properly.
+ *
+ * On success, return entry with acquired lock for reading, otherwise error ptr.
+ */
+static struct cache_entry *cache_refresh_path(const unsigned int xid,
+					      struct cifs_ses *ses,
+					      const char *path,
+					      bool force_refresh)
+{
+	struct dfs_info3_param *refs = NULL;
+	struct cache_entry *ce;
+	int numrefs = 0;
+	int rc;
+
+	cifs_dbg(FYI, "%s: search path: %s\n", __func__, path);
+
+	down_read(&htable_rw_lock);
+
+	ce = lookup_cache_entry(path);
+	if (!IS_ERR(ce)) {
+		if (!force_refresh && !cache_entry_expired(ce))
+			return ce;
+	} else if (PTR_ERR(ce) != -ENOENT) {
+		up_read(&htable_rw_lock);
+		return ce;
+	}
+
+	/*
+	 * Unlock shared access as we don't want to hold any locks while getting
+	 * a new referral.  The @ses used for performing the I/O could be
+	 * reconnecting and it acquires @htable_rw_lock to look up the dfs cache
+	 * in order to failover -- if necessary.
+	 */
+	up_read(&htable_rw_lock);
+
+	/*
+	 * Either the entry was not found, or it is expired, or it is a forced
+	 * refresh.
+	 * Request a new DFS referral in order to create or update a cache entry.
+	 */
+	rc = get_dfs_referral(xid, ses, path, &refs, &numrefs);
+	if (rc) {
+		ce = ERR_PTR(rc);
+		goto out;
+	}
+
+	dump_refs(refs, numrefs);
+
+	down_write(&htable_rw_lock);
+	/* Re-check as another task might have it added or refreshed already */
+	ce = lookup_cache_entry(path);
+	if (!IS_ERR(ce)) {
+		if (force_refresh || cache_entry_expired(ce)) {
+			rc = update_cache_entry_locked(ce, refs, numrefs);
+			if (rc)
+				ce = ERR_PTR(rc);
+		}
+	} else if (PTR_ERR(ce) == -ENOENT) {
+		ce = add_cache_entry_locked(refs, numrefs);
+	}
+
+	if (IS_ERR(ce)) {
+		up_write(&htable_rw_lock);
+		goto out;
+	}
+
+	downgrade_write(&htable_rw_lock);
+out:
+	free_dfs_info_array(refs, numrefs);
+	return ce;
+}
+
+/*
+ * Set up a DFS referral from a given cache entry.
+ *
+ * Must be called with htable_rw_lock held.
+ */
+static int setup_referral(const char *path, struct cache_entry *ce,
+			  struct dfs_info3_param *ref, const char *target)
+{
+	int rc;
+
+	cifs_dbg(FYI, "%s: set up new ref\n", __func__);
+
+	memset(ref, 0, sizeof(*ref));
+
+	ref->path_name = kstrdup(path, GFP_ATOMIC);
+	if (!ref->path_name)
+		return -ENOMEM;
+
+	ref->node_name = kstrdup(target, GFP_ATOMIC);
+	if (!ref->node_name) {
+		rc = -ENOMEM;
+		goto err_free_path;
+	}
+
+	ref->path_consumed = ce->path_consumed;
+	ref->ttl = ce->ttl;
+	ref->server_type = ce->srvtype;
+	ref->ref_flag = ce->ref_flags;
+	ref->flags = ce->hdr_flags;
+
+	return 0;
+
+err_free_path:
+	kfree(ref->path_name);
+	ref->path_name = NULL;
+	return rc;
+}
+
+/* Return target list of a DFS cache entry */
+static int get_targets(struct cache_entry *ce, struct dfs_cache_tgt_list *tl)
+{
+	int rc;
+	struct list_head *head = &tl->tl_list;
+	struct cache_dfs_tgt *t;
+	struct dfs_cache_tgt_iterator *it, *nit;
+
+	memset(tl, 0, sizeof(*tl));
+	INIT_LIST_HEAD(head);
+
+	list_for_each_entry(t, &ce->tlist, list) {
+		it = kzalloc(sizeof(*it), GFP_ATOMIC);
+		if (!it) {
+			rc = -ENOMEM;
+			goto err_free_it;
+		}
+
+		it->it_name = kstrdup(t->name, GFP_ATOMIC);
+		if (!it->it_name) {
+			kfree(it);
+			rc = -ENOMEM;
+			goto err_free_it;
+		}
+		it->it_path_consumed = t->path_consumed;
+
+		if (READ_ONCE(ce->tgthint) == t)
+			list_add(&it->it_list, head);
+		else
+			list_add_tail(&it->it_list, head);
+	}
+
+	tl->tl_numtgts = ce->numtgts;
+
+	return 0;
+
+err_free_it:
+	list_for_each_entry_safe(it, nit, head, it_list) {
+		list_del(&it->it_list);
+		kfree(it->it_name);
+		kfree(it);
+	}
+	return rc;
+}
+
+/**
+ * dfs_cache_find - find a DFS cache entry
+ *
+ * If it doesn't find the cache entry, then it will get a DFS referral
+ * for @path and create a new entry.
+ *
+ * In case the cache entry exists but expired, it will get a DFS referral
+ * for @path and then update the respective cache entry.
+ *
+ * These parameters are passed down to the get_dfs_refer() call if it
+ * needs to be issued:
+ * @xid: syscall xid
+ * @ses: smb session to issue the request on
+ * @cp: codepage
+ * @remap: path character remapping type
+ * @path: path to lookup in DFS referral cache.
+ *
+ * @ref: when non-NULL, store single DFS referral result in it.
+ * @tgt_list: when non-NULL, store complete DFS target list in it.
+ *
+ * Return zero if the target was found, otherwise non-zero.
+ */
+int dfs_cache_find(const unsigned int xid, struct cifs_ses *ses, const struct nls_table *cp,
+		   int remap, const char *path, struct dfs_info3_param *ref,
+		   struct dfs_cache_tgt_list *tgt_list)
+{
+	int rc;
+	const char *npath;
+	struct cache_entry *ce;
+
+	npath = dfs_cache_canonical_path(path, cp, remap);
+	if (IS_ERR(npath))
+		return PTR_ERR(npath);
+
+	ce = cache_refresh_path(xid, ses, npath, false);
+	if (IS_ERR(ce)) {
+		rc = PTR_ERR(ce);
+		goto out_free_path;
+	}
+
+	if (ref)
+		rc = setup_referral(path, ce, ref, get_tgt_name(ce));
+	else
+		rc = 0;
+	if (!rc && tgt_list)
+		rc = get_targets(ce, tgt_list);
+
+	up_read(&htable_rw_lock);
+
+out_free_path:
+	kfree(npath);
+	return rc;
+}
+
+/**
+ * dfs_cache_noreq_find - find a DFS cache entry without sending any requests to
+ * the currently connected server.
+ *
+ * NOTE: This function will neither update a cache entry in case it was
+ * expired, nor create a new cache entry if @path hasn't been found. It heavily
+ * relies on an existing cache entry.
+ *
+ * @path: canonical DFS path to lookup in the DFS referral cache.
+ * @ref: when non-NULL, store single DFS referral result in it.
+ * @tgt_list: when non-NULL, store complete DFS target list in it.
+ *
+ * Return 0 if successful.
+ * Return -ENOENT if the entry was not found.
+ * Return non-zero for other errors.
+ */
+int dfs_cache_noreq_find(const char *path, struct dfs_info3_param *ref,
+			 struct dfs_cache_tgt_list *tgt_list)
+{
+	int rc;
+	struct cache_entry *ce;
+
+	cifs_dbg(FYI, "%s: path: %s\n", __func__, path);
+
+	down_read(&htable_rw_lock);
+
+	ce = lookup_cache_entry(path);
+	if (IS_ERR(ce)) {
+		rc = PTR_ERR(ce);
+		goto out_unlock;
+	}
+
+	if (ref)
+		rc = setup_referral(path, ce, ref, get_tgt_name(ce));
+	else
+		rc = 0;
+	if (!rc && tgt_list)
+		rc = get_targets(ce, tgt_list);
+
+out_unlock:
+	up_read(&htable_rw_lock);
+	return rc;
+}
+
+/**
+ * dfs_cache_noreq_update_tgthint - update target hint of a DFS cache entry
+ * without sending any requests to the currently connected server.
+ *
+ * NOTE: This function will neither update a cache entry in case it was
+ * expired, nor create a new cache entry if @path hasn't been found. It heavily
+ * relies on an existing cache entry.
+ *
+ * @path: canonical DFS path to lookup in DFS referral cache.
+ * @it: target iterator which contains the target hint to update the cache
+ * entry with.
+ *
+ * Return zero if the target hint was updated successfully, otherwise non-zero.
+ */
+void dfs_cache_noreq_update_tgthint(const char *path, const struct dfs_cache_tgt_iterator *it)
+{
+	struct cache_dfs_tgt *t;
+	struct cache_entry *ce;
+
+	if (!path || !it)
+		return;
+
+	cifs_dbg(FYI, "%s: path: %s\n", __func__, path);
+
+	down_read(&htable_rw_lock);
+
+	ce = lookup_cache_entry(path);
+	if (IS_ERR(ce))
+		goto out_unlock;
+
+	t = READ_ONCE(ce->tgthint);
+
+	if (unlikely(!strcasecmp(it->it_name, t->name)))
+		goto out_unlock;
+
+	list_for_each_entry(t, &ce->tlist, list) {
+		if (!strcasecmp(t->name, it->it_name)) {
+			WRITE_ONCE(ce->tgthint, t);
+			cifs_dbg(FYI, "%s: new target hint: %s\n", __func__,
+				 it->it_name);
+			break;
+		}
+	}
+
+out_unlock:
+	up_read(&htable_rw_lock);
+}
+
+/**
+ * dfs_cache_get_tgt_referral - returns a DFS referral (@ref) from a given
+ * target iterator (@it).
+ *
+ * @path: canonical DFS path to lookup in DFS referral cache.
+ * @it: DFS target iterator.
+ * @ref: DFS referral pointer to set up the gathered information.
+ *
+ * Return zero if the DFS referral was set up correctly, otherwise non-zero.
+ */
+int dfs_cache_get_tgt_referral(const char *path, const struct dfs_cache_tgt_iterator *it,
+			       struct dfs_info3_param *ref)
+{
+	int rc;
+	struct cache_entry *ce;
+
+	if (!it || !ref)
+		return -EINVAL;
+
+	cifs_dbg(FYI, "%s: path: %s\n", __func__, path);
+
+	down_read(&htable_rw_lock);
+
+	ce = lookup_cache_entry(path);
+	if (IS_ERR(ce)) {
+		rc = PTR_ERR(ce);
+		goto out_unlock;
+	}
+
+	cifs_dbg(FYI, "%s: target name: %s\n", __func__, it->it_name);
+
+	rc = setup_referral(path, ce, ref, it->it_name);
+
+out_unlock:
+	up_read(&htable_rw_lock);
+	return rc;
+}
+
+/* Extract share from DFS target and return a pointer to prefix path or NULL */
+static const char *parse_target_share(const char *target, char **share)
+{
+	const char *s, *seps = "/\\";
+	size_t len;
+
+	s = strpbrk(target + 1, seps);
+	if (!s)
+		return ERR_PTR(-EINVAL);
+
+	len = strcspn(s + 1, seps);
+	if (!len)
+		return ERR_PTR(-EINVAL);
+	s += len;
+
+	len = s - target + 1;
+	*share = kstrndup(target, len, GFP_KERNEL);
+	if (!*share)
+		return ERR_PTR(-ENOMEM);
+
+	s = target + len;
+	return s + strspn(s, seps);
+}
+
+/**
+ * dfs_cache_get_tgt_share - parse a DFS target
+ *
+ * @path: DFS full path
+ * @it: DFS target iterator.
+ * @share: tree name.
+ * @prefix: prefix path.
+ *
+ * Return zero if target was parsed correctly, otherwise non-zero.
+ */
+int dfs_cache_get_tgt_share(char *path, const struct dfs_cache_tgt_iterator *it, char **share,
+			    char **prefix)
+{
+	char sep;
+	char *target_share;
+	char *ppath = NULL;
+	const char *target_ppath, *dfsref_ppath;
+	size_t target_pplen, dfsref_pplen;
+	size_t len, c;
+
+	if (!it || !path || !share || !prefix || strlen(path) < it->it_path_consumed)
+		return -EINVAL;
+
+	sep = it->it_name[0];
+	if (sep != '\\' && sep != '/')
+		return -EINVAL;
+
+	target_ppath = parse_target_share(it->it_name, &target_share);
+	if (IS_ERR(target_ppath))
+		return PTR_ERR(target_ppath);
+
+	/* point to prefix in DFS referral path */
+	dfsref_ppath = path + it->it_path_consumed;
+	dfsref_ppath += strspn(dfsref_ppath, "/\\");
+
+	target_pplen = strlen(target_ppath);
+	dfsref_pplen = strlen(dfsref_ppath);
+
+	/* merge prefix paths from DFS referral path and target node */
+	if (target_pplen || dfsref_pplen) {
+		len = target_pplen + dfsref_pplen + 2;
+		ppath = kzalloc(len, GFP_KERNEL);
+		if (!ppath) {
+			kfree(target_share);
+			return -ENOMEM;
+		}
+		c = strscpy(ppath, target_ppath, len);
+		if (c && dfsref_pplen)
+			ppath[c] = sep;
+		strlcat(ppath, dfsref_ppath, len);
+	}
+	*share = target_share;
+	*prefix = ppath;
+	return 0;
+}
+
+static bool target_share_equal(struct TCP_Server_Info *server, const char *s1, const char *s2)
+{
+	char unc[sizeof("\\\\") + SERVER_NAME_LENGTH] = {0};
+	const char *host;
+	size_t hostlen;
+	struct sockaddr_storage ss;
+	bool match;
+	int rc;
+
+	if (strcasecmp(s1, s2))
+		return false;
+
+	/*
+	 * Resolve share's hostname and check if server address matches.  Otherwise just ignore it
+	 * as we could not have upcall to resolve hostname or failed to convert ip address.
+	 */
+	extract_unc_hostname(s1, &host, &hostlen);
+	scnprintf(unc, sizeof(unc), "\\\\%.*s", (int)hostlen, host);
+
+	rc = dns_resolve_server_name_to_ip(unc, (struct sockaddr *)&ss, NULL);
+	if (rc < 0) {
+		cifs_dbg(FYI, "%s: could not resolve %.*s. assuming server address matches.\n",
+			 __func__, (int)hostlen, host);
+		return true;
+	}
+
+	cifs_server_lock(server);
+	match = cifs_match_ipaddr((struct sockaddr *)&server->dstaddr, (struct sockaddr *)&ss);
+	cifs_server_unlock(server);
+
+	return match;
+}
+
+/*
+ * Mark dfs tcon for reconnecting when the currently connected tcon does not match any of the new
+ * target shares in @refs.
+ */
+static void mark_for_reconnect_if_needed(struct TCP_Server_Info *server,
+					 const char *path,
+					 struct dfs_cache_tgt_list *old_tl,
+					 struct dfs_cache_tgt_list *new_tl)
+{
+	struct dfs_cache_tgt_iterator *oit, *nit;
+
+	for (oit = dfs_cache_get_tgt_iterator(old_tl); oit;
+	     oit = dfs_cache_get_next_tgt(old_tl, oit)) {
+		for (nit = dfs_cache_get_tgt_iterator(new_tl); nit;
+		     nit = dfs_cache_get_next_tgt(new_tl, nit)) {
+			if (target_share_equal(server,
+					       dfs_cache_get_tgt_name(oit),
+					       dfs_cache_get_tgt_name(nit))) {
+				dfs_cache_noreq_update_tgthint(path, nit);
+				return;
+			}
+		}
+	}
+
+	cifs_dbg(FYI, "%s: no cached or matched targets. mark dfs share for reconnect.\n", __func__);
+	cifs_signal_cifsd_for_reconnect(server, true);
+}
+
+static bool is_ses_good(struct cifs_ses *ses)
+{
+	struct TCP_Server_Info *server = ses->server;
+	struct cifs_tcon *tcon = ses->tcon_ipc;
+	bool ret;
+
+	spin_lock(&ses->ses_lock);
+	spin_lock(&ses->chan_lock);
+	ret = !cifs_chan_needs_reconnect(ses, server) &&
+		ses->ses_status == SES_GOOD &&
+		!tcon->need_reconnect;
+	spin_unlock(&ses->chan_lock);
+	spin_unlock(&ses->ses_lock);
+	return ret;
+}
+
+/* Refresh dfs referral of tcon and mark it for reconnect if needed */
+static int __refresh_tcon(const char *path, struct cifs_ses *ses, bool force_refresh)
+{
+	struct TCP_Server_Info *server = ses->server;
+	DFS_CACHE_TGT_LIST(old_tl);
+	DFS_CACHE_TGT_LIST(new_tl);
+	bool needs_refresh = false;
+	struct cache_entry *ce;
+	unsigned int xid;
+	int rc = 0;
+
+	xid = get_xid();
+
+	down_read(&htable_rw_lock);
+	ce = lookup_cache_entry(path);
+	needs_refresh = force_refresh || IS_ERR(ce) || cache_entry_expired(ce);
+	if (!IS_ERR(ce)) {
+		rc = get_targets(ce, &old_tl);
+		cifs_dbg(FYI, "%s: get_targets: %d\n", __func__, rc);
+	}
+	up_read(&htable_rw_lock);
+
+	if (!needs_refresh) {
+		rc = 0;
+		goto out;
+	}
+
+	ses = CIFS_DFS_ROOT_SES(ses);
+	if (!is_ses_good(ses)) {
+		cifs_dbg(FYI, "%s: skip cache refresh due to disconnected ipc\n",
+			 __func__);
+		goto out;
+	}
+
+	ce = cache_refresh_path(xid, ses, path, true);
+	if (!IS_ERR(ce)) {
+		rc = get_targets(ce, &new_tl);
+		up_read(&htable_rw_lock);
+		cifs_dbg(FYI, "%s: get_targets: %d\n", __func__, rc);
+		mark_for_reconnect_if_needed(server, path, &old_tl, &new_tl);
+	}
+
+out:
+	free_xid(xid);
+	dfs_cache_free_tgts(&old_tl);
+	dfs_cache_free_tgts(&new_tl);
+	return rc;
+}
+
+static int refresh_tcon(struct cifs_tcon *tcon, bool force_refresh)
+{
+	struct TCP_Server_Info *server = tcon->ses->server;
+	struct cifs_ses *ses = tcon->ses;
+
+	mutex_lock(&server->refpath_lock);
+	if (server->leaf_fullpath)
+		__refresh_tcon(server->leaf_fullpath + 1, ses, force_refresh);
+	mutex_unlock(&server->refpath_lock);
+	return 0;
+}
+
+/**
+ * dfs_cache_remount_fs - remount a DFS share
+ *
+ * Reconfigure dfs mount by forcing a new DFS referral and if the currently cached targets do not
+ * match any of the new targets, mark it for reconnect.
+ *
+ * @cifs_sb: cifs superblock.
+ *
+ * Return zero if remounted, otherwise non-zero.
+ */
+int dfs_cache_remount_fs(struct cifs_sb_info *cifs_sb)
+{
+	struct cifs_tcon *tcon;
+
+	if (!cifs_sb || !cifs_sb->master_tlink)
+		return -EINVAL;
+
+	tcon = cifs_sb_master_tcon(cifs_sb);
+
+	spin_lock(&tcon->tc_lock);
+	if (!tcon->origin_fullpath) {
+		spin_unlock(&tcon->tc_lock);
+		cifs_dbg(FYI, "%s: not a dfs mount\n", __func__);
+		return 0;
+	}
+	spin_unlock(&tcon->tc_lock);
+
+	/*
+	 * After reconnecting to a different server, unique ids won't match anymore, so we disable
+	 * serverino. This prevents dentry revalidation to think the dentry are stale (ESTALE).
+	 */
+	cifs_autodisable_serverino(cifs_sb);
+	/*
+	 * Force the use of prefix path to support failover on DFS paths that resolve to targets
+	 * that have different prefix paths.
+	 */
+	cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_USE_PREFIX_PATH;
+
+	return refresh_tcon(tcon, true);
+}
+
+/* Refresh all DFS referrals related to DFS tcon */
+void dfs_cache_refresh(struct work_struct *work)
+{
+	struct TCP_Server_Info *server;
+	struct dfs_root_ses *rses;
+	struct cifs_tcon *tcon;
+	struct cifs_ses *ses;
+
+	tcon = container_of(work, struct cifs_tcon, dfs_cache_work.work);
+	ses = tcon->ses;
+	server = ses->server;
+
+	mutex_lock(&server->refpath_lock);
+	if (server->leaf_fullpath)
+		__refresh_tcon(server->leaf_fullpath + 1, ses, false);
+	mutex_unlock(&server->refpath_lock);
+
+	list_for_each_entry(rses, &tcon->dfs_ses_list, list) {
+		ses = rses->ses;
+		server = ses->server;
+		mutex_lock(&server->refpath_lock);
+		if (server->leaf_fullpath)
+			__refresh_tcon(server->leaf_fullpath + 1, ses, false);
+		mutex_unlock(&server->refpath_lock);
+	}
+
+	queue_delayed_work(dfscache_wq, &tcon->dfs_cache_work,
+			   atomic_read(&dfs_cache_ttl) * HZ);
+}
diff --git a/fs/smb/client/dfs_cache.h b/fs/smb/client/dfs_cache.h
new file mode 100644
index 0000000000..18a08a2ca9
--- /dev/null
+++ b/fs/smb/client/dfs_cache.h
@@ -0,0 +1,105 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * DFS referral cache routines
+ *
+ * Copyright (c) 2018-2019 Paulo Alcantara <palcantara@suse.de>
+ */
+
+#ifndef _CIFS_DFS_CACHE_H
+#define _CIFS_DFS_CACHE_H
+
+#include <linux/nls.h>
+#include <linux/list.h>
+#include <linux/uuid.h>
+#include "cifsglob.h"
+
+extern struct workqueue_struct *dfscache_wq;
+extern atomic_t dfs_cache_ttl;
+
+#define DFS_CACHE_TGT_LIST_INIT(var) \
+	{ .tl_numtgts = 0, .tl_list = LIST_HEAD_INIT((var).tl_list), }
+
+#define DFS_CACHE_TGT_LIST(var) \
+	struct dfs_cache_tgt_list var = DFS_CACHE_TGT_LIST_INIT(var)
+
+struct dfs_cache_tgt_list {
+	int tl_numtgts;
+	struct list_head tl_list;
+};
+
+struct dfs_cache_tgt_iterator {
+	char *it_name;
+	int it_path_consumed;
+	struct list_head it_list;
+};
+
+int dfs_cache_init(void);
+void dfs_cache_destroy(void);
+extern const struct proc_ops dfscache_proc_ops;
+
+int dfs_cache_find(const unsigned int xid, struct cifs_ses *ses, const struct nls_table *cp,
+		   int remap, const char *path, struct dfs_info3_param *ref,
+		   struct dfs_cache_tgt_list *tgt_list);
+int dfs_cache_noreq_find(const char *path, struct dfs_info3_param *ref,
+			 struct dfs_cache_tgt_list *tgt_list);
+void dfs_cache_noreq_update_tgthint(const char *path, const struct dfs_cache_tgt_iterator *it);
+int dfs_cache_get_tgt_referral(const char *path, const struct dfs_cache_tgt_iterator *it,
+			       struct dfs_info3_param *ref);
+int dfs_cache_get_tgt_share(char *path, const struct dfs_cache_tgt_iterator *it, char **share,
+			    char **prefix);
+char *dfs_cache_canonical_path(const char *path, const struct nls_table *cp, int remap);
+int dfs_cache_remount_fs(struct cifs_sb_info *cifs_sb);
+void dfs_cache_refresh(struct work_struct *work);
+
+static inline struct dfs_cache_tgt_iterator *
+dfs_cache_get_next_tgt(struct dfs_cache_tgt_list *tl,
+		       struct dfs_cache_tgt_iterator *it)
+{
+	if (!tl || !tl->tl_numtgts || list_empty(&tl->tl_list) ||
+	    !it || list_is_last(&it->it_list, &tl->tl_list))
+		return NULL;
+	return list_next_entry(it, it_list);
+}
+
+static inline struct dfs_cache_tgt_iterator *
+dfs_cache_get_tgt_iterator(struct dfs_cache_tgt_list *tl)
+{
+	if (!tl)
+		return NULL;
+	return list_first_entry_or_null(&tl->tl_list,
+					struct dfs_cache_tgt_iterator,
+					it_list);
+}
+
+static inline void dfs_cache_free_tgts(struct dfs_cache_tgt_list *tl)
+{
+	struct dfs_cache_tgt_iterator *it, *nit;
+
+	if (!tl || !tl->tl_numtgts || list_empty(&tl->tl_list))
+		return;
+	list_for_each_entry_safe(it, nit, &tl->tl_list, it_list) {
+		list_del(&it->it_list);
+		kfree(it->it_name);
+		kfree(it);
+	}
+	tl->tl_numtgts = 0;
+}
+
+static inline const char *
+dfs_cache_get_tgt_name(const struct dfs_cache_tgt_iterator *it)
+{
+	return it ? it->it_name : NULL;
+}
+
+static inline int
+dfs_cache_get_nr_tgts(const struct dfs_cache_tgt_list *tl)
+{
+	return tl ? tl->tl_numtgts : 0;
+}
+
+static inline int dfs_cache_get_ttl(void)
+{
+	return atomic_read(&dfs_cache_ttl);
+}
+
+#endif /* _CIFS_DFS_CACHE_H */
diff --git a/fs/smb/client/dir.c b/fs/smb/client/dir.c
new file mode 100644
index 0000000000..580a27a3a7
--- /dev/null
+++ b/fs/smb/client/dir.c
@@ -0,0 +1,876 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *
+ *   vfs operations that deal with dentries
+ *
+ *   Copyright (C) International Business Machines  Corp., 2002,2009
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ */
+#include <linux/fs.h>
+#include <linux/stat.h>
+#include <linux/slab.h>
+#include <linux/namei.h>
+#include <linux/mount.h>
+#include <linux/file.h>
+#include "cifsfs.h"
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifs_fs_sb.h"
+#include "cifs_unicode.h"
+#include "fs_context.h"
+#include "cifs_ioctl.h"
+#include "fscache.h"
+
+static void
+renew_parental_timestamps(struct dentry *direntry)
+{
+	/* BB check if there is a way to get the kernel to do this or if we
+	   really need this */
+	do {
+		cifs_set_time(direntry, jiffies);
+		direntry = direntry->d_parent;
+	} while (!IS_ROOT(direntry));
+}
+
+char *
+cifs_build_path_to_root(struct smb3_fs_context *ctx, struct cifs_sb_info *cifs_sb,
+			struct cifs_tcon *tcon, int add_treename)
+{
+	int pplen = ctx->prepath ? strlen(ctx->prepath) + 1 : 0;
+	int dfsplen;
+	char *full_path = NULL;
+
+	/* if no prefix path, simply set path to the root of share to "" */
+	if (pplen == 0) {
+		full_path = kzalloc(1, GFP_KERNEL);
+		return full_path;
+	}
+
+	if (add_treename)
+		dfsplen = strnlen(tcon->tree_name, MAX_TREE_SIZE + 1);
+	else
+		dfsplen = 0;
+
+	full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL);
+	if (full_path == NULL)
+		return full_path;
+
+	if (dfsplen)
+		memcpy(full_path, tcon->tree_name, dfsplen);
+	full_path[dfsplen] = CIFS_DIR_SEP(cifs_sb);
+	memcpy(full_path + dfsplen + 1, ctx->prepath, pplen);
+	convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
+	return full_path;
+}
+
+/* Note: caller must free return buffer */
+const char *
+build_path_from_dentry(struct dentry *direntry, void *page)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
+	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+	bool prefix = tcon->Flags & SMB_SHARE_IS_IN_DFS;
+
+	return build_path_from_dentry_optional_prefix(direntry, page,
+						      prefix);
+}
+
+char *__build_path_from_dentry_optional_prefix(struct dentry *direntry, void *page,
+					       const char *tree, int tree_len,
+					       bool prefix)
+{
+	int dfsplen;
+	int pplen = 0;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
+	char dirsep = CIFS_DIR_SEP(cifs_sb);
+	char *s;
+
+	if (unlikely(!page))
+		return ERR_PTR(-ENOMEM);
+
+	if (prefix)
+		dfsplen = strnlen(tree, tree_len + 1);
+	else
+		dfsplen = 0;
+
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
+		pplen = cifs_sb->prepath ? strlen(cifs_sb->prepath) + 1 : 0;
+
+	s = dentry_path_raw(direntry, page, PATH_MAX);
+	if (IS_ERR(s))
+		return s;
+	if (!s[1])	// for root we want "", not "/"
+		s++;
+	if (s < (char *)page + pplen + dfsplen)
+		return ERR_PTR(-ENAMETOOLONG);
+	if (pplen) {
+		cifs_dbg(FYI, "using cifs_sb prepath <%s>\n", cifs_sb->prepath);
+		s -= pplen;
+		memcpy(s + 1, cifs_sb->prepath, pplen - 1);
+		*s = '/';
+	}
+	if (dirsep != '/') {
+		/* BB test paths to Windows with '/' in the midst of prepath */
+		char *p;
+
+		for (p = s; *p; p++)
+			if (*p == '/')
+				*p = dirsep;
+	}
+	if (dfsplen) {
+		s -= dfsplen;
+		memcpy(s, tree, dfsplen);
+		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) {
+			int i;
+			for (i = 0; i < dfsplen; i++) {
+				if (s[i] == '\\')
+					s[i] = '/';
+			}
+		}
+	}
+	return s;
+}
+
+char *build_path_from_dentry_optional_prefix(struct dentry *direntry, void *page,
+					     bool prefix)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
+	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+
+	return __build_path_from_dentry_optional_prefix(direntry, page, tcon->tree_name,
+							MAX_TREE_SIZE, prefix);
+}
+
+/*
+ * Don't allow path components longer than the server max.
+ * Don't allow the separator character in a path component.
+ * The VFS will not allow "/", but "\" is allowed by posix.
+ */
+static int
+check_name(struct dentry *direntry, struct cifs_tcon *tcon)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
+	int i;
+
+	if (unlikely(tcon->fsAttrInfo.MaxPathNameComponentLength &&
+		     direntry->d_name.len >
+		     le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength)))
+		return -ENAMETOOLONG;
+
+	if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) {
+		for (i = 0; i < direntry->d_name.len; i++) {
+			if (direntry->d_name.name[i] == '\\') {
+				cifs_dbg(FYI, "Invalid file name\n");
+				return -EINVAL;
+			}
+		}
+	}
+	return 0;
+}
+
+
+/* Inode operations in similar order to how they appear in Linux file fs.h */
+
+static int cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid,
+			  struct tcon_link *tlink, unsigned int oflags, umode_t mode, __u32 *oplock,
+			  struct cifs_fid *fid, struct cifs_open_info_data *buf)
+{
+	int rc = -ENOENT;
+	int create_options = CREATE_NOT_DIR;
+	int desired_access;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct cifs_tcon *tcon = tlink_tcon(tlink);
+	const char *full_path;
+	void *page = alloc_dentry_path();
+	struct inode *newinode = NULL;
+	int disposition;
+	struct TCP_Server_Info *server = tcon->ses->server;
+	struct cifs_open_parms oparms;
+
+	*oplock = 0;
+	if (tcon->ses->server->oplocks)
+		*oplock = REQ_OPLOCK;
+
+	full_path = build_path_from_dentry(direntry, page);
+	if (IS_ERR(full_path)) {
+		free_dentry_path(page);
+		return PTR_ERR(full_path);
+	}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	if (tcon->unix_ext && cap_unix(tcon->ses) && !tcon->broken_posix_open &&
+	    (CIFS_UNIX_POSIX_PATH_OPS_CAP &
+			le64_to_cpu(tcon->fsUnixInfo.Capability))) {
+		rc = cifs_posix_open(full_path, &newinode, inode->i_sb, mode,
+				     oflags, oplock, &fid->netfid, xid);
+		switch (rc) {
+		case 0:
+			if (newinode == NULL) {
+				/* query inode info */
+				goto cifs_create_get_file_info;
+			}
+
+			if (S_ISDIR(newinode->i_mode)) {
+				CIFSSMBClose(xid, tcon, fid->netfid);
+				iput(newinode);
+				rc = -EISDIR;
+				goto out;
+			}
+
+			if (!S_ISREG(newinode->i_mode)) {
+				/*
+				 * The server may allow us to open things like
+				 * FIFOs, but the client isn't set up to deal
+				 * with that. If it's not a regular file, just
+				 * close it and proceed as if it were a normal
+				 * lookup.
+				 */
+				CIFSSMBClose(xid, tcon, fid->netfid);
+				goto cifs_create_get_file_info;
+			}
+			/* success, no need to query */
+			goto cifs_create_set_dentry;
+
+		case -ENOENT:
+			goto cifs_create_get_file_info;
+
+		case -EIO:
+		case -EINVAL:
+			/*
+			 * EIO could indicate that (posix open) operation is not
+			 * supported, despite what server claimed in capability
+			 * negotiation.
+			 *
+			 * POSIX open in samba versions 3.3.1 and earlier could
+			 * incorrectly fail with invalid parameter.
+			 */
+			tcon->broken_posix_open = true;
+			break;
+
+		case -EREMOTE:
+		case -EOPNOTSUPP:
+			/*
+			 * EREMOTE indicates DFS junction, which is not handled
+			 * in posix open.  If either that or op not supported
+			 * returned, follow the normal lookup.
+			 */
+			break;
+
+		default:
+			goto out;
+		}
+		/*
+		 * fallthrough to retry, using older open call, this is case
+		 * where server does not support this SMB level, and falsely
+		 * claims capability (also get here for DFS case which should be
+		 * rare for path not covered on files)
+		 */
+	}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+	desired_access = 0;
+	if (OPEN_FMODE(oflags) & FMODE_READ)
+		desired_access |= GENERIC_READ; /* is this too little? */
+	if (OPEN_FMODE(oflags) & FMODE_WRITE)
+		desired_access |= GENERIC_WRITE;
+
+	disposition = FILE_OVERWRITE_IF;
+	if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
+		disposition = FILE_CREATE;
+	else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC))
+		disposition = FILE_OVERWRITE_IF;
+	else if ((oflags & O_CREAT) == O_CREAT)
+		disposition = FILE_OPEN_IF;
+	else
+		cifs_dbg(FYI, "Create flag not set in create function\n");
+
+	/*
+	 * BB add processing to set equivalent of mode - e.g. via CreateX with
+	 * ACLs
+	 */
+
+	if (!server->ops->open) {
+		rc = -ENOSYS;
+		goto out;
+	}
+
+	/*
+	 * if we're not using unix extensions, see if we need to set
+	 * ATTR_READONLY on the create call
+	 */
+	if (!tcon->unix_ext && (mode & S_IWUGO) == 0)
+		create_options |= CREATE_OPTION_READONLY;
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.cifs_sb = cifs_sb,
+		.desired_access = desired_access,
+		.create_options = cifs_create_options(cifs_sb, create_options),
+		.disposition = disposition,
+		.path = full_path,
+		.fid = fid,
+		.mode = mode,
+	};
+	rc = server->ops->open(xid, &oparms, oplock, buf);
+	if (rc) {
+		cifs_dbg(FYI, "cifs_create returned 0x%x\n", rc);
+		goto out;
+	}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	/*
+	 * If Open reported that we actually created a file then we now have to
+	 * set the mode if possible.
+	 */
+	if ((tcon->unix_ext) && (*oplock & CIFS_CREATE_ACTION)) {
+		struct cifs_unix_set_info_args args = {
+				.mode	= mode,
+				.ctime	= NO_CHANGE_64,
+				.atime	= NO_CHANGE_64,
+				.mtime	= NO_CHANGE_64,
+				.device	= 0,
+		};
+
+		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
+			args.uid = current_fsuid();
+			if (inode->i_mode & S_ISGID)
+				args.gid = inode->i_gid;
+			else
+				args.gid = current_fsgid();
+		} else {
+			args.uid = INVALID_UID; /* no change */
+			args.gid = INVALID_GID; /* no change */
+		}
+		CIFSSMBUnixSetFileInfo(xid, tcon, &args, fid->netfid,
+				       current->tgid);
+	} else {
+		/*
+		 * BB implement mode setting via Windows security
+		 * descriptors e.g.
+		 */
+		/* CIFSSMBWinSetPerms(xid,tcon,path,mode,-1,-1,nls);*/
+
+		/* Could set r/o dos attribute if mode & 0222 == 0 */
+	}
+
+cifs_create_get_file_info:
+	/* server might mask mode so we have to query for it */
+	if (tcon->unix_ext)
+		rc = cifs_get_inode_info_unix(&newinode, full_path, inode->i_sb,
+					      xid);
+	else {
+#else
+	{
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+		/* TODO: Add support for calling POSIX query info here, but passing in fid */
+		rc = cifs_get_inode_info(&newinode, full_path, buf, inode->i_sb, xid, fid);
+		if (newinode) {
+			if (server->ops->set_lease_key)
+				server->ops->set_lease_key(newinode, fid);
+			if ((*oplock & CIFS_CREATE_ACTION) && S_ISREG(newinode->i_mode)) {
+				if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
+					newinode->i_mode = mode;
+				if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
+					newinode->i_uid = current_fsuid();
+					if (inode->i_mode & S_ISGID)
+						newinode->i_gid = inode->i_gid;
+					else
+						newinode->i_gid = current_fsgid();
+				}
+			}
+		}
+	}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+cifs_create_set_dentry:
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+	if (rc != 0) {
+		cifs_dbg(FYI, "Create worked, get_inode_info failed rc = %d\n",
+			 rc);
+		goto out_err;
+	}
+
+	if (newinode)
+		if (S_ISDIR(newinode->i_mode)) {
+			rc = -EISDIR;
+			goto out_err;
+		}
+
+	d_drop(direntry);
+	d_add(direntry, newinode);
+
+out:
+	free_dentry_path(page);
+	return rc;
+
+out_err:
+	if (server->ops->close)
+		server->ops->close(xid, tcon, fid);
+	if (newinode)
+		iput(newinode);
+	goto out;
+}
+
+int
+cifs_atomic_open(struct inode *inode, struct dentry *direntry,
+		 struct file *file, unsigned oflags, umode_t mode)
+{
+	int rc;
+	unsigned int xid;
+	struct tcon_link *tlink;
+	struct cifs_tcon *tcon;
+	struct TCP_Server_Info *server;
+	struct cifs_fid fid = {};
+	struct cifs_pending_open open;
+	__u32 oplock;
+	struct cifsFileInfo *file_info;
+	struct cifs_open_info_data buf = {};
+
+	if (unlikely(cifs_forced_shutdown(CIFS_SB(inode->i_sb))))
+		return -EIO;
+
+	/*
+	 * Posix open is only called (at lookup time) for file create now. For
+	 * opens (rather than creates), because we do not know if it is a file
+	 * or directory yet, and current Samba no longer allows us to do posix
+	 * open on dirs, we could end up wasting an open call on what turns out
+	 * to be a dir. For file opens, we wait to call posix open till
+	 * cifs_open.  It could be added to atomic_open in the future but the
+	 * performance tradeoff of the extra network request when EISDIR or
+	 * EACCES is returned would have to be weighed against the 50% reduction
+	 * in network traffic in the other paths.
+	 */
+	if (!(oflags & O_CREAT)) {
+		struct dentry *res;
+
+		/*
+		 * Check for hashed negative dentry. We have already revalidated
+		 * the dentry and it is fine. No need to perform another lookup.
+		 */
+		if (!d_in_lookup(direntry))
+			return -ENOENT;
+
+		res = cifs_lookup(inode, direntry, 0);
+		if (IS_ERR(res))
+			return PTR_ERR(res);
+
+		return finish_no_open(file, res);
+	}
+
+	xid = get_xid();
+
+	cifs_dbg(FYI, "parent inode = 0x%p name is: %pd and dentry = 0x%p\n",
+		 inode, direntry, direntry);
+
+	tlink = cifs_sb_tlink(CIFS_SB(inode->i_sb));
+	if (IS_ERR(tlink)) {
+		rc = PTR_ERR(tlink);
+		goto out_free_xid;
+	}
+
+	tcon = tlink_tcon(tlink);
+
+	rc = check_name(direntry, tcon);
+	if (rc)
+		goto out;
+
+	server = tcon->ses->server;
+
+	if (server->ops->new_lease_key)
+		server->ops->new_lease_key(&fid);
+
+	cifs_add_pending_open(&fid, tlink, &open);
+
+	rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode,
+			    &oplock, &fid, &buf);
+	if (rc) {
+		cifs_del_pending_open(&open);
+		goto out;
+	}
+
+	if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
+		file->f_mode |= FMODE_CREATED;
+
+	rc = finish_open(file, direntry, generic_file_open);
+	if (rc) {
+		if (server->ops->close)
+			server->ops->close(xid, tcon, &fid);
+		cifs_del_pending_open(&open);
+		goto out;
+	}
+
+	if (file->f_flags & O_DIRECT &&
+	    CIFS_SB(inode->i_sb)->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) {
+		if (CIFS_SB(inode->i_sb)->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
+			file->f_op = &cifs_file_direct_nobrl_ops;
+		else
+			file->f_op = &cifs_file_direct_ops;
+		}
+
+	file_info = cifs_new_fileinfo(&fid, file, tlink, oplock, buf.symlink_target);
+	if (file_info == NULL) {
+		if (server->ops->close)
+			server->ops->close(xid, tcon, &fid);
+		cifs_del_pending_open(&open);
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	fscache_use_cookie(cifs_inode_cookie(file_inode(file)),
+			   file->f_mode & FMODE_WRITE);
+
+out:
+	cifs_put_tlink(tlink);
+out_free_xid:
+	free_xid(xid);
+	cifs_free_open_info(&buf);
+	return rc;
+}
+
+int cifs_create(struct mnt_idmap *idmap, struct inode *inode,
+		struct dentry *direntry, umode_t mode, bool excl)
+{
+	int rc;
+	unsigned int xid = get_xid();
+	/*
+	 * BB below access is probably too much for mknod to request
+	 *    but we have to do query and setpathinfo so requesting
+	 *    less could fail (unless we want to request getatr and setatr
+	 *    permissions (only).  At least for POSIX we do not have to
+	 *    request so much.
+	 */
+	unsigned oflags = O_EXCL | O_CREAT | O_RDWR;
+	struct tcon_link *tlink;
+	struct cifs_tcon *tcon;
+	struct TCP_Server_Info *server;
+	struct cifs_fid fid;
+	__u32 oplock;
+	struct cifs_open_info_data buf = {};
+
+	cifs_dbg(FYI, "cifs_create parent inode = 0x%p name is: %pd and dentry = 0x%p\n",
+		 inode, direntry, direntry);
+
+	if (unlikely(cifs_forced_shutdown(CIFS_SB(inode->i_sb)))) {
+		rc = -EIO;
+		goto out_free_xid;
+	}
+
+	tlink = cifs_sb_tlink(CIFS_SB(inode->i_sb));
+	rc = PTR_ERR(tlink);
+	if (IS_ERR(tlink))
+		goto out_free_xid;
+
+	tcon = tlink_tcon(tlink);
+	server = tcon->ses->server;
+
+	if (server->ops->new_lease_key)
+		server->ops->new_lease_key(&fid);
+
+	rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode, &oplock, &fid, &buf);
+	if (!rc && server->ops->close)
+		server->ops->close(xid, tcon, &fid);
+
+	cifs_free_open_info(&buf);
+	cifs_put_tlink(tlink);
+out_free_xid:
+	free_xid(xid);
+	return rc;
+}
+
+int cifs_mknod(struct mnt_idmap *idmap, struct inode *inode,
+	       struct dentry *direntry, umode_t mode, dev_t device_number)
+{
+	int rc = -EPERM;
+	unsigned int xid;
+	struct cifs_sb_info *cifs_sb;
+	struct tcon_link *tlink;
+	struct cifs_tcon *tcon;
+	const char *full_path;
+	void *page;
+
+	if (!old_valid_dev(device_number))
+		return -EINVAL;
+
+	cifs_sb = CIFS_SB(inode->i_sb);
+	if (unlikely(cifs_forced_shutdown(cifs_sb)))
+		return -EIO;
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+
+	page = alloc_dentry_path();
+	tcon = tlink_tcon(tlink);
+	xid = get_xid();
+
+	full_path = build_path_from_dentry(direntry, page);
+	if (IS_ERR(full_path)) {
+		rc = PTR_ERR(full_path);
+		goto mknod_out;
+	}
+
+	rc = tcon->ses->server->ops->make_node(xid, inode, direntry, tcon,
+					       full_path, mode,
+					       device_number);
+
+mknod_out:
+	free_dentry_path(page);
+	free_xid(xid);
+	cifs_put_tlink(tlink);
+	return rc;
+}
+
+struct dentry *
+cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
+	    unsigned int flags)
+{
+	unsigned int xid;
+	int rc = 0; /* to get around spurious gcc warning, set to zero here */
+	struct cifs_sb_info *cifs_sb;
+	struct tcon_link *tlink;
+	struct cifs_tcon *pTcon;
+	struct inode *newInode = NULL;
+	const char *full_path;
+	void *page;
+	int retry_count = 0;
+
+	xid = get_xid();
+
+	cifs_dbg(FYI, "parent inode = 0x%p name is: %pd and dentry = 0x%p\n",
+		 parent_dir_inode, direntry, direntry);
+
+	/* check whether path exists */
+
+	cifs_sb = CIFS_SB(parent_dir_inode->i_sb);
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink)) {
+		free_xid(xid);
+		return ERR_CAST(tlink);
+	}
+	pTcon = tlink_tcon(tlink);
+
+	rc = check_name(direntry, pTcon);
+	if (unlikely(rc)) {
+		cifs_put_tlink(tlink);
+		free_xid(xid);
+		return ERR_PTR(rc);
+	}
+
+	/* can not grab the rename sem here since it would
+	deadlock in the cases (beginning of sys_rename itself)
+	in which we already have the sb rename sem */
+	page = alloc_dentry_path();
+	full_path = build_path_from_dentry(direntry, page);
+	if (IS_ERR(full_path)) {
+		cifs_put_tlink(tlink);
+		free_xid(xid);
+		free_dentry_path(page);
+		return ERR_CAST(full_path);
+	}
+
+	if (d_really_is_positive(direntry)) {
+		cifs_dbg(FYI, "non-NULL inode in lookup\n");
+	} else {
+		cifs_dbg(FYI, "NULL inode in lookup\n");
+	}
+	cifs_dbg(FYI, "Full path: %s inode = 0x%p\n",
+		 full_path, d_inode(direntry));
+
+again:
+	if (pTcon->posix_extensions)
+		rc = smb311_posix_get_inode_info(&newInode, full_path, parent_dir_inode->i_sb, xid);
+	else if (pTcon->unix_ext) {
+		rc = cifs_get_inode_info_unix(&newInode, full_path,
+					      parent_dir_inode->i_sb, xid);
+	} else {
+		rc = cifs_get_inode_info(&newInode, full_path, NULL,
+				parent_dir_inode->i_sb, xid, NULL);
+	}
+
+	if (rc == 0) {
+		/* since paths are not looked up by component - the parent
+		   directories are presumed to be good here */
+		renew_parental_timestamps(direntry);
+	} else if (rc == -EAGAIN && retry_count++ < 10) {
+		goto again;
+	} else if (rc == -ENOENT) {
+		cifs_set_time(direntry, jiffies);
+		newInode = NULL;
+	} else {
+		if (rc != -EACCES) {
+			cifs_dbg(FYI, "Unexpected lookup error %d\n", rc);
+			/* We special case check for Access Denied - since that
+			is a common return code */
+		}
+		newInode = ERR_PTR(rc);
+	}
+	free_dentry_path(page);
+	cifs_put_tlink(tlink);
+	free_xid(xid);
+	return d_splice_alias(newInode, direntry);
+}
+
+static int
+cifs_d_revalidate(struct dentry *direntry, unsigned int flags)
+{
+	struct inode *inode;
+	int rc;
+
+	if (flags & LOOKUP_RCU)
+		return -ECHILD;
+
+	if (d_really_is_positive(direntry)) {
+		inode = d_inode(direntry);
+		if ((flags & LOOKUP_REVAL) && !CIFS_CACHE_READ(CIFS_I(inode)))
+			CIFS_I(inode)->time = 0; /* force reval */
+
+		rc = cifs_revalidate_dentry(direntry);
+		if (rc) {
+			cifs_dbg(FYI, "cifs_revalidate_dentry failed with rc=%d", rc);
+			switch (rc) {
+			case -ENOENT:
+			case -ESTALE:
+				/*
+				 * Those errors mean the dentry is invalid
+				 * (file was deleted or recreated)
+				 */
+				return 0;
+			default:
+				/*
+				 * Otherwise some unexpected error happened
+				 * report it as-is to VFS layer
+				 */
+				return rc;
+			}
+		}
+		else {
+			/*
+			 * If the inode wasn't known to be a dfs entry when
+			 * the dentry was instantiated, such as when created
+			 * via ->readdir(), it needs to be set now since the
+			 * attributes will have been updated by
+			 * cifs_revalidate_dentry().
+			 */
+			if (IS_AUTOMOUNT(inode) &&
+			   !(direntry->d_flags & DCACHE_NEED_AUTOMOUNT)) {
+				spin_lock(&direntry->d_lock);
+				direntry->d_flags |= DCACHE_NEED_AUTOMOUNT;
+				spin_unlock(&direntry->d_lock);
+			}
+
+			return 1;
+		}
+	}
+
+	/*
+	 * This may be nfsd (or something), anyway, we can't see the
+	 * intent of this. So, since this can be for creation, drop it.
+	 */
+	if (!flags)
+		return 0;
+
+	/*
+	 * Drop the negative dentry, in order to make sure to use the
+	 * case sensitive name which is specified by user if this is
+	 * for creation.
+	 */
+	if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
+		return 0;
+
+	if (time_after(jiffies, cifs_get_time(direntry) + HZ) || !lookupCacheEnabled)
+		return 0;
+
+	return 1;
+}
+
+/* static int cifs_d_delete(struct dentry *direntry)
+{
+	int rc = 0;
+
+	cifs_dbg(FYI, "In cifs d_delete, name = %pd\n", direntry);
+
+	return rc;
+}     */
+
+const struct dentry_operations cifs_dentry_ops = {
+	.d_revalidate = cifs_d_revalidate,
+	.d_automount = cifs_d_automount,
+/* d_delete:       cifs_d_delete,      */ /* not needed except for debugging */
+};
+
+static int cifs_ci_hash(const struct dentry *dentry, struct qstr *q)
+{
+	struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls;
+	unsigned long hash;
+	wchar_t c;
+	int i, charlen;
+
+	hash = init_name_hash(dentry);
+	for (i = 0; i < q->len; i += charlen) {
+		charlen = codepage->char2uni(&q->name[i], q->len - i, &c);
+		/* error out if we can't convert the character */
+		if (unlikely(charlen < 0))
+			return charlen;
+		hash = partial_name_hash(cifs_toupper(c), hash);
+	}
+	q->hash = end_name_hash(hash);
+
+	return 0;
+}
+
+static int cifs_ci_compare(const struct dentry *dentry,
+		unsigned int len, const char *str, const struct qstr *name)
+{
+	struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls;
+	wchar_t c1, c2;
+	int i, l1, l2;
+
+	/*
+	 * We make the assumption here that uppercase characters in the local
+	 * codepage are always the same length as their lowercase counterparts.
+	 *
+	 * If that's ever not the case, then this will fail to match it.
+	 */
+	if (name->len != len)
+		return 1;
+
+	for (i = 0; i < len; i += l1) {
+		/* Convert characters in both strings to UTF-16. */
+		l1 = codepage->char2uni(&str[i], len - i, &c1);
+		l2 = codepage->char2uni(&name->name[i], name->len - i, &c2);
+
+		/*
+		 * If we can't convert either character, just declare it to
+		 * be 1 byte long and compare the original byte.
+		 */
+		if (unlikely(l1 < 0 && l2 < 0)) {
+			if (str[i] != name->name[i])
+				return 1;
+			l1 = 1;
+			continue;
+		}
+
+		/*
+		 * Here, we again ass|u|me that upper/lowercase versions of
+		 * a character are the same length in the local NLS.
+		 */
+		if (l1 != l2)
+			return 1;
+
+		/* Now compare uppercase versions of these characters */
+		if (cifs_toupper(c1) != cifs_toupper(c2))
+			return 1;
+	}
+
+	return 0;
+}
+
+const struct dentry_operations cifs_ci_dentry_ops = {
+	.d_revalidate = cifs_d_revalidate,
+	.d_hash = cifs_ci_hash,
+	.d_compare = cifs_ci_compare,
+	.d_automount = cifs_d_automount,
+};
diff --git a/fs/smb/client/dns_resolve.c b/fs/smb/client/dns_resolve.c
new file mode 100644
index 0000000000..8bf8978bc5
--- /dev/null
+++ b/fs/smb/client/dns_resolve.c
@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *
+ *   Copyright (c) 2007 Igor Mammedov
+ *   Author(s): Igor Mammedov (niallain@gmail.com)
+ *              Steve French (sfrench@us.ibm.com)
+ *              Wang Lei (wang840925@gmail.com)
+ *		David Howells (dhowells@redhat.com)
+ *
+ *   Contains the CIFS DFS upcall routines used for hostname to
+ *   IP address translation.
+ *
+ */
+
+#include <linux/inet.h>
+#include <linux/slab.h>
+#include <linux/dns_resolver.h>
+#include "dns_resolve.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+
+/**
+ * dns_resolve_server_name_to_ip - Resolve UNC server name to ip address.
+ * @unc: UNC path specifying the server (with '/' as delimiter)
+ * @ip_addr: Where to return the IP address.
+ * @expiry: Where to return the expiry time for the dns record.
+ *
+ * Returns zero success, -ve on error.
+ */
+int
+dns_resolve_server_name_to_ip(const char *unc, struct sockaddr *ip_addr, time64_t *expiry)
+{
+	const char *hostname, *sep;
+	char *ip;
+	int len, rc;
+
+	if (!ip_addr || !unc)
+		return -EINVAL;
+
+	len = strlen(unc);
+	if (len < 3) {
+		cifs_dbg(FYI, "%s: unc is too short: %s\n", __func__, unc);
+		return -EINVAL;
+	}
+
+	/* Discount leading slashes for cifs */
+	len -= 2;
+	hostname = unc + 2;
+
+	/* Search for server name delimiter */
+	sep = memchr(hostname, '/', len);
+	if (sep)
+		len = sep - hostname;
+	else
+		cifs_dbg(FYI, "%s: probably server name is whole unc: %s\n",
+			 __func__, unc);
+
+	/* Try to interpret hostname as an IPv4 or IPv6 address */
+	rc = cifs_convert_address(ip_addr, hostname, len);
+	if (rc > 0) {
+		cifs_dbg(FYI, "%s: unc is IP, skipping dns upcall: %*.*s\n", __func__, len, len,
+			 hostname);
+		return 0;
+	}
+
+	/* Perform the upcall */
+	rc = dns_query(current->nsproxy->net_ns, NULL, hostname, len,
+		       NULL, &ip, expiry, false);
+	if (rc < 0) {
+		cifs_dbg(FYI, "%s: unable to resolve: %*.*s\n",
+			 __func__, len, len, hostname);
+	} else {
+		cifs_dbg(FYI, "%s: resolved: %*.*s to %s expiry %llu\n",
+			 __func__, len, len, hostname, ip,
+			 expiry ? (*expiry) : 0);
+
+		rc = cifs_convert_address(ip_addr, ip, strlen(ip));
+		kfree(ip);
+
+		if (!rc) {
+			cifs_dbg(FYI, "%s: unable to determine ip address\n", __func__);
+			rc = -EHOSTUNREACH;
+		} else
+			rc = 0;
+	}
+	return rc;
+}
diff --git a/fs/smb/client/dns_resolve.h b/fs/smb/client/dns_resolve.h
new file mode 100644
index 0000000000..6eb0c15a24
--- /dev/null
+++ b/fs/smb/client/dns_resolve.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+/*
+ *   DNS Resolver upcall management for CIFS DFS
+ *   Handles host name to IP address resolution
+ *
+ *   Copyright (c) International Business Machines  Corp., 2008
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ */
+
+#ifndef _DNS_RESOLVE_H
+#define _DNS_RESOLVE_H
+
+#include <linux/net.h>
+
+#ifdef __KERNEL__
+int dns_resolve_server_name_to_ip(const char *unc, struct sockaddr *ip_addr, time64_t *expiry);
+#endif /* KERNEL */
+
+#endif /* _DNS_RESOLVE_H */
diff --git a/fs/smb/client/export.c b/fs/smb/client/export.c
new file mode 100644
index 0000000000..37c28415df
--- /dev/null
+++ b/fs/smb/client/export.c
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *
+ *   Copyright (C) International Business Machines  Corp., 2007
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   Common Internet FileSystem (CIFS) client
+ *
+ *   Operations related to support for exporting files via NFSD
+ *
+ */
+
+ /*
+  * See Documentation/filesystems/nfs/exporting.rst
+  * and examples in fs/exportfs
+  *
+  * Since cifs is a network file system, an "fsid" must be included for
+  * any nfs exports file entries which refer to cifs paths.  In addition
+  * the cifs mount must be mounted with the "serverino" option (ie use stable
+  * server inode numbers instead of locally generated temporary ones).
+  * Although cifs inodes do not use generation numbers (have generation number
+  * of zero) - the inode number alone should be good enough for simple cases
+  * in which users want to export cifs shares with NFS. The decode and encode
+  * could be improved by using a new routine which expects 64 bit inode numbers
+  * instead of the default 32 bit routines in fs/exportfs
+  *
+  */
+
+#include <linux/fs.h>
+#include <linux/exportfs.h>
+#include "cifsglob.h"
+#include "cifs_debug.h"
+#include "cifsfs.h"
+
+#ifdef CONFIG_CIFS_NFSD_EXPORT
+static struct dentry *cifs_get_parent(struct dentry *dentry)
+{
+	/* BB need to add code here eventually to enable export via NFSD */
+	cifs_dbg(FYI, "get parent for %p\n", dentry);
+	return ERR_PTR(-EACCES);
+}
+
+const struct export_operations cifs_export_ops = {
+	.get_parent = cifs_get_parent,
+/*	Following five export operations are unneeded so far and can default:
+	.get_dentry =
+	.get_name =
+	.find_exported_dentry =
+	.decode_fh =
+	.encode_fs =  */
+};
+
+#endif /* CONFIG_CIFS_NFSD_EXPORT */
+
diff --git a/fs/smb/client/file.c b/fs/smb/client/file.c
new file mode 100644
index 0000000000..32a8525415
--- /dev/null
+++ b/fs/smb/client/file.c
@@ -0,0 +1,5095 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *
+ *   vfs operations that deal with files
+ *
+ *   Copyright (C) International Business Machines  Corp., 2002,2010
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *              Jeremy Allison (jra@samba.org)
+ *
+ */
+#include <linux/fs.h>
+#include <linux/filelock.h>
+#include <linux/backing-dev.h>
+#include <linux/stat.h>
+#include <linux/fcntl.h>
+#include <linux/pagemap.h>
+#include <linux/pagevec.h>
+#include <linux/writeback.h>
+#include <linux/task_io_accounting_ops.h>
+#include <linux/delay.h>
+#include <linux/mount.h>
+#include <linux/slab.h>
+#include <linux/swap.h>
+#include <linux/mm.h>
+#include <asm/div64.h>
+#include "cifsfs.h"
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "smb2proto.h"
+#include "cifs_unicode.h"
+#include "cifs_debug.h"
+#include "cifs_fs_sb.h"
+#include "fscache.h"
+#include "smbdirect.h"
+#include "fs_context.h"
+#include "cifs_ioctl.h"
+#include "cached_dir.h"
+
+/*
+ * Remove the dirty flags from a span of pages.
+ */
+static void cifs_undirty_folios(struct inode *inode, loff_t start, unsigned int len)
+{
+	struct address_space *mapping = inode->i_mapping;
+	struct folio *folio;
+	pgoff_t end;
+
+	XA_STATE(xas, &mapping->i_pages, start / PAGE_SIZE);
+
+	rcu_read_lock();
+
+	end = (start + len - 1) / PAGE_SIZE;
+	xas_for_each_marked(&xas, folio, end, PAGECACHE_TAG_DIRTY) {
+		if (xas_retry(&xas, folio))
+			continue;
+		xas_pause(&xas);
+		rcu_read_unlock();
+		folio_lock(folio);
+		folio_clear_dirty_for_io(folio);
+		folio_unlock(folio);
+		rcu_read_lock();
+	}
+
+	rcu_read_unlock();
+}
+
+/*
+ * Completion of write to server.
+ */
+void cifs_pages_written_back(struct inode *inode, loff_t start, unsigned int len)
+{
+	struct address_space *mapping = inode->i_mapping;
+	struct folio *folio;
+	pgoff_t end;
+
+	XA_STATE(xas, &mapping->i_pages, start / PAGE_SIZE);
+
+	if (!len)
+		return;
+
+	rcu_read_lock();
+
+	end = (start + len - 1) / PAGE_SIZE;
+	xas_for_each(&xas, folio, end) {
+		if (xas_retry(&xas, folio))
+			continue;
+		if (!folio_test_writeback(folio)) {
+			WARN_ONCE(1, "bad %x @%llx page %lx %lx\n",
+				  len, start, folio_index(folio), end);
+			continue;
+		}
+
+		folio_detach_private(folio);
+		folio_end_writeback(folio);
+	}
+
+	rcu_read_unlock();
+}
+
+/*
+ * Failure of write to server.
+ */
+void cifs_pages_write_failed(struct inode *inode, loff_t start, unsigned int len)
+{
+	struct address_space *mapping = inode->i_mapping;
+	struct folio *folio;
+	pgoff_t end;
+
+	XA_STATE(xas, &mapping->i_pages, start / PAGE_SIZE);
+
+	if (!len)
+		return;
+
+	rcu_read_lock();
+
+	end = (start + len - 1) / PAGE_SIZE;
+	xas_for_each(&xas, folio, end) {
+		if (xas_retry(&xas, folio))
+			continue;
+		if (!folio_test_writeback(folio)) {
+			WARN_ONCE(1, "bad %x @%llx page %lx %lx\n",
+				  len, start, folio_index(folio), end);
+			continue;
+		}
+
+		folio_set_error(folio);
+		folio_end_writeback(folio);
+	}
+
+	rcu_read_unlock();
+}
+
+/*
+ * Redirty pages after a temporary failure.
+ */
+void cifs_pages_write_redirty(struct inode *inode, loff_t start, unsigned int len)
+{
+	struct address_space *mapping = inode->i_mapping;
+	struct folio *folio;
+	pgoff_t end;
+
+	XA_STATE(xas, &mapping->i_pages, start / PAGE_SIZE);
+
+	if (!len)
+		return;
+
+	rcu_read_lock();
+
+	end = (start + len - 1) / PAGE_SIZE;
+	xas_for_each(&xas, folio, end) {
+		if (!folio_test_writeback(folio)) {
+			WARN_ONCE(1, "bad %x @%llx page %lx %lx\n",
+				  len, start, folio_index(folio), end);
+			continue;
+		}
+
+		filemap_dirty_folio(folio->mapping, folio);
+		folio_end_writeback(folio);
+	}
+
+	rcu_read_unlock();
+}
+
+/*
+ * Mark as invalid, all open files on tree connections since they
+ * were closed when session to server was lost.
+ */
+void
+cifs_mark_open_files_invalid(struct cifs_tcon *tcon)
+{
+	struct cifsFileInfo *open_file = NULL;
+	struct list_head *tmp;
+	struct list_head *tmp1;
+
+	/* only send once per connect */
+	spin_lock(&tcon->tc_lock);
+	if (tcon->status != TID_NEED_RECON) {
+		spin_unlock(&tcon->tc_lock);
+		return;
+	}
+	tcon->status = TID_IN_FILES_INVALIDATE;
+	spin_unlock(&tcon->tc_lock);
+
+	/* list all files open on tree connection and mark them invalid */
+	spin_lock(&tcon->open_file_lock);
+	list_for_each_safe(tmp, tmp1, &tcon->openFileList) {
+		open_file = list_entry(tmp, struct cifsFileInfo, tlist);
+		open_file->invalidHandle = true;
+		open_file->oplock_break_cancelled = true;
+	}
+	spin_unlock(&tcon->open_file_lock);
+
+	invalidate_all_cached_dirs(tcon);
+	spin_lock(&tcon->tc_lock);
+	if (tcon->status == TID_IN_FILES_INVALIDATE)
+		tcon->status = TID_NEED_TCON;
+	spin_unlock(&tcon->tc_lock);
+
+	/*
+	 * BB Add call to invalidate_inodes(sb) for all superblocks mounted
+	 * to this tcon.
+	 */
+}
+
+static inline int cifs_convert_flags(unsigned int flags)
+{
+	if ((flags & O_ACCMODE) == O_RDONLY)
+		return GENERIC_READ;
+	else if ((flags & O_ACCMODE) == O_WRONLY)
+		return GENERIC_WRITE;
+	else if ((flags & O_ACCMODE) == O_RDWR) {
+		/* GENERIC_ALL is too much permission to request
+		   can cause unnecessary access denied on create */
+		/* return GENERIC_ALL; */
+		return (GENERIC_READ | GENERIC_WRITE);
+	}
+
+	return (READ_CONTROL | FILE_WRITE_ATTRIBUTES | FILE_READ_ATTRIBUTES |
+		FILE_WRITE_EA | FILE_APPEND_DATA | FILE_WRITE_DATA |
+		FILE_READ_DATA);
+}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+static u32 cifs_posix_convert_flags(unsigned int flags)
+{
+	u32 posix_flags = 0;
+
+	if ((flags & O_ACCMODE) == O_RDONLY)
+		posix_flags = SMB_O_RDONLY;
+	else if ((flags & O_ACCMODE) == O_WRONLY)
+		posix_flags = SMB_O_WRONLY;
+	else if ((flags & O_ACCMODE) == O_RDWR)
+		posix_flags = SMB_O_RDWR;
+
+	if (flags & O_CREAT) {
+		posix_flags |= SMB_O_CREAT;
+		if (flags & O_EXCL)
+			posix_flags |= SMB_O_EXCL;
+	} else if (flags & O_EXCL)
+		cifs_dbg(FYI, "Application %s pid %d has incorrectly set O_EXCL flag but not O_CREAT on file open. Ignoring O_EXCL\n",
+			 current->comm, current->tgid);
+
+	if (flags & O_TRUNC)
+		posix_flags |= SMB_O_TRUNC;
+	/* be safe and imply O_SYNC for O_DSYNC */
+	if (flags & O_DSYNC)
+		posix_flags |= SMB_O_SYNC;
+	if (flags & O_DIRECTORY)
+		posix_flags |= SMB_O_DIRECTORY;
+	if (flags & O_NOFOLLOW)
+		posix_flags |= SMB_O_NOFOLLOW;
+	if (flags & O_DIRECT)
+		posix_flags |= SMB_O_DIRECT;
+
+	return posix_flags;
+}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+static inline int cifs_get_disposition(unsigned int flags)
+{
+	if ((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
+		return FILE_CREATE;
+	else if ((flags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC))
+		return FILE_OVERWRITE_IF;
+	else if ((flags & O_CREAT) == O_CREAT)
+		return FILE_OPEN_IF;
+	else if ((flags & O_TRUNC) == O_TRUNC)
+		return FILE_OVERWRITE;
+	else
+		return FILE_OPEN;
+}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+int cifs_posix_open(const char *full_path, struct inode **pinode,
+			struct super_block *sb, int mode, unsigned int f_flags,
+			__u32 *poplock, __u16 *pnetfid, unsigned int xid)
+{
+	int rc;
+	FILE_UNIX_BASIC_INFO *presp_data;
+	__u32 posix_flags = 0;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	struct cifs_fattr fattr;
+	struct tcon_link *tlink;
+	struct cifs_tcon *tcon;
+
+	cifs_dbg(FYI, "posix open %s\n", full_path);
+
+	presp_data = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
+	if (presp_data == NULL)
+		return -ENOMEM;
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink)) {
+		rc = PTR_ERR(tlink);
+		goto posix_open_ret;
+	}
+
+	tcon = tlink_tcon(tlink);
+	mode &= ~current_umask();
+
+	posix_flags = cifs_posix_convert_flags(f_flags);
+	rc = CIFSPOSIXCreate(xid, tcon, posix_flags, mode, pnetfid, presp_data,
+			     poplock, full_path, cifs_sb->local_nls,
+			     cifs_remap(cifs_sb));
+	cifs_put_tlink(tlink);
+
+	if (rc)
+		goto posix_open_ret;
+
+	if (presp_data->Type == cpu_to_le32(-1))
+		goto posix_open_ret; /* open ok, caller does qpathinfo */
+
+	if (!pinode)
+		goto posix_open_ret; /* caller does not need info */
+
+	cifs_unix_basic_to_fattr(&fattr, presp_data, cifs_sb);
+
+	/* get new inode and set it up */
+	if (*pinode == NULL) {
+		cifs_fill_uniqueid(sb, &fattr);
+		*pinode = cifs_iget(sb, &fattr);
+		if (!*pinode) {
+			rc = -ENOMEM;
+			goto posix_open_ret;
+		}
+	} else {
+		cifs_revalidate_mapping(*pinode);
+		rc = cifs_fattr_to_inode(*pinode, &fattr);
+	}
+
+posix_open_ret:
+	kfree(presp_data);
+	return rc;
+}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+static int cifs_nt_open(const char *full_path, struct inode *inode, struct cifs_sb_info *cifs_sb,
+			struct cifs_tcon *tcon, unsigned int f_flags, __u32 *oplock,
+			struct cifs_fid *fid, unsigned int xid, struct cifs_open_info_data *buf)
+{
+	int rc;
+	int desired_access;
+	int disposition;
+	int create_options = CREATE_NOT_DIR;
+	struct TCP_Server_Info *server = tcon->ses->server;
+	struct cifs_open_parms oparms;
+
+	if (!server->ops->open)
+		return -ENOSYS;
+
+	desired_access = cifs_convert_flags(f_flags);
+
+/*********************************************************************
+ *  open flag mapping table:
+ *
+ *	POSIX Flag            CIFS Disposition
+ *	----------            ----------------
+ *	O_CREAT               FILE_OPEN_IF
+ *	O_CREAT | O_EXCL      FILE_CREATE
+ *	O_CREAT | O_TRUNC     FILE_OVERWRITE_IF
+ *	O_TRUNC               FILE_OVERWRITE
+ *	none of the above     FILE_OPEN
+ *
+ *	Note that there is not a direct match between disposition
+ *	FILE_SUPERSEDE (ie create whether or not file exists although
+ *	O_CREAT | O_TRUNC is similar but truncates the existing
+ *	file rather than creating a new file as FILE_SUPERSEDE does
+ *	(which uses the attributes / metadata passed in on open call)
+ *?
+ *?  O_SYNC is a reasonable match to CIFS writethrough flag
+ *?  and the read write flags match reasonably.  O_LARGEFILE
+ *?  is irrelevant because largefile support is always used
+ *?  by this client. Flags O_APPEND, O_DIRECT, O_DIRECTORY,
+ *	 O_FASYNC, O_NOFOLLOW, O_NONBLOCK need further investigation
+ *********************************************************************/
+
+	disposition = cifs_get_disposition(f_flags);
+
+	/* BB pass O_SYNC flag through on file attributes .. BB */
+
+	/* O_SYNC also has bit for O_DSYNC so following check picks up either */
+	if (f_flags & O_SYNC)
+		create_options |= CREATE_WRITE_THROUGH;
+
+	if (f_flags & O_DIRECT)
+		create_options |= CREATE_NO_BUFFER;
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.cifs_sb = cifs_sb,
+		.desired_access = desired_access,
+		.create_options = cifs_create_options(cifs_sb, create_options),
+		.disposition = disposition,
+		.path = full_path,
+		.fid = fid,
+	};
+
+	rc = server->ops->open(xid, &oparms, oplock, buf);
+	if (rc)
+		return rc;
+
+	/* TODO: Add support for calling posix query info but with passing in fid */
+	if (tcon->unix_ext)
+		rc = cifs_get_inode_info_unix(&inode, full_path, inode->i_sb,
+					      xid);
+	else
+		rc = cifs_get_inode_info(&inode, full_path, buf, inode->i_sb,
+					 xid, fid);
+
+	if (rc) {
+		server->ops->close(xid, tcon, fid);
+		if (rc == -ESTALE)
+			rc = -EOPENSTALE;
+	}
+
+	return rc;
+}
+
+static bool
+cifs_has_mand_locks(struct cifsInodeInfo *cinode)
+{
+	struct cifs_fid_locks *cur;
+	bool has_locks = false;
+
+	down_read(&cinode->lock_sem);
+	list_for_each_entry(cur, &cinode->llist, llist) {
+		if (!list_empty(&cur->locks)) {
+			has_locks = true;
+			break;
+		}
+	}
+	up_read(&cinode->lock_sem);
+	return has_locks;
+}
+
+void
+cifs_down_write(struct rw_semaphore *sem)
+{
+	while (!down_write_trylock(sem))
+		msleep(10);
+}
+
+static void cifsFileInfo_put_work(struct work_struct *work);
+
+struct cifsFileInfo *cifs_new_fileinfo(struct cifs_fid *fid, struct file *file,
+				       struct tcon_link *tlink, __u32 oplock,
+				       const char *symlink_target)
+{
+	struct dentry *dentry = file_dentry(file);
+	struct inode *inode = d_inode(dentry);
+	struct cifsInodeInfo *cinode = CIFS_I(inode);
+	struct cifsFileInfo *cfile;
+	struct cifs_fid_locks *fdlocks;
+	struct cifs_tcon *tcon = tlink_tcon(tlink);
+	struct TCP_Server_Info *server = tcon->ses->server;
+
+	cfile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
+	if (cfile == NULL)
+		return cfile;
+
+	fdlocks = kzalloc(sizeof(struct cifs_fid_locks), GFP_KERNEL);
+	if (!fdlocks) {
+		kfree(cfile);
+		return NULL;
+	}
+
+	if (symlink_target) {
+		cfile->symlink_target = kstrdup(symlink_target, GFP_KERNEL);
+		if (!cfile->symlink_target) {
+			kfree(fdlocks);
+			kfree(cfile);
+			return NULL;
+		}
+	}
+
+	INIT_LIST_HEAD(&fdlocks->locks);
+	fdlocks->cfile = cfile;
+	cfile->llist = fdlocks;
+
+	cfile->count = 1;
+	cfile->pid = current->tgid;
+	cfile->uid = current_fsuid();
+	cfile->dentry = dget(dentry);
+	cfile->f_flags = file->f_flags;
+	cfile->invalidHandle = false;
+	cfile->deferred_close_scheduled = false;
+	cfile->tlink = cifs_get_tlink(tlink);
+	INIT_WORK(&cfile->oplock_break, cifs_oplock_break);
+	INIT_WORK(&cfile->put, cifsFileInfo_put_work);
+	INIT_DELAYED_WORK(&cfile->deferred, smb2_deferred_work_close);
+	mutex_init(&cfile->fh_mutex);
+	spin_lock_init(&cfile->file_info_lock);
+
+	cifs_sb_active(inode->i_sb);
+
+	/*
+	 * If the server returned a read oplock and we have mandatory brlocks,
+	 * set oplock level to None.
+	 */
+	if (server->ops->is_read_op(oplock) && cifs_has_mand_locks(cinode)) {
+		cifs_dbg(FYI, "Reset oplock val from read to None due to mand locks\n");
+		oplock = 0;
+	}
+
+	cifs_down_write(&cinode->lock_sem);
+	list_add(&fdlocks->llist, &cinode->llist);
+	up_write(&cinode->lock_sem);
+
+	spin_lock(&tcon->open_file_lock);
+	if (fid->pending_open->oplock != CIFS_OPLOCK_NO_CHANGE && oplock)
+		oplock = fid->pending_open->oplock;
+	list_del(&fid->pending_open->olist);
+
+	fid->purge_cache = false;
+	server->ops->set_fid(cfile, fid, oplock);
+
+	list_add(&cfile->tlist, &tcon->openFileList);
+	atomic_inc(&tcon->num_local_opens);
+
+	/* if readable file instance put first in list*/
+	spin_lock(&cinode->open_file_lock);
+	if (file->f_mode & FMODE_READ)
+		list_add(&cfile->flist, &cinode->openFileList);
+	else
+		list_add_tail(&cfile->flist, &cinode->openFileList);
+	spin_unlock(&cinode->open_file_lock);
+	spin_unlock(&tcon->open_file_lock);
+
+	if (fid->purge_cache)
+		cifs_zap_mapping(inode);
+
+	file->private_data = cfile;
+	return cfile;
+}
+
+struct cifsFileInfo *
+cifsFileInfo_get(struct cifsFileInfo *cifs_file)
+{
+	spin_lock(&cifs_file->file_info_lock);
+	cifsFileInfo_get_locked(cifs_file);
+	spin_unlock(&cifs_file->file_info_lock);
+	return cifs_file;
+}
+
+static void cifsFileInfo_put_final(struct cifsFileInfo *cifs_file)
+{
+	struct inode *inode = d_inode(cifs_file->dentry);
+	struct cifsInodeInfo *cifsi = CIFS_I(inode);
+	struct cifsLockInfo *li, *tmp;
+	struct super_block *sb = inode->i_sb;
+
+	/*
+	 * Delete any outstanding lock records. We'll lose them when the file
+	 * is closed anyway.
+	 */
+	cifs_down_write(&cifsi->lock_sem);
+	list_for_each_entry_safe(li, tmp, &cifs_file->llist->locks, llist) {
+		list_del(&li->llist);
+		cifs_del_lock_waiters(li);
+		kfree(li);
+	}
+	list_del(&cifs_file->llist->llist);
+	kfree(cifs_file->llist);
+	up_write(&cifsi->lock_sem);
+
+	cifs_put_tlink(cifs_file->tlink);
+	dput(cifs_file->dentry);
+	cifs_sb_deactive(sb);
+	kfree(cifs_file->symlink_target);
+	kfree(cifs_file);
+}
+
+static void cifsFileInfo_put_work(struct work_struct *work)
+{
+	struct cifsFileInfo *cifs_file = container_of(work,
+			struct cifsFileInfo, put);
+
+	cifsFileInfo_put_final(cifs_file);
+}
+
+/**
+ * cifsFileInfo_put - release a reference of file priv data
+ *
+ * Always potentially wait for oplock handler. See _cifsFileInfo_put().
+ *
+ * @cifs_file:	cifs/smb3 specific info (eg refcounts) for an open file
+ */
+void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
+{
+	_cifsFileInfo_put(cifs_file, true, true);
+}
+
+/**
+ * _cifsFileInfo_put - release a reference of file priv data
+ *
+ * This may involve closing the filehandle @cifs_file out on the
+ * server. Must be called without holding tcon->open_file_lock,
+ * cinode->open_file_lock and cifs_file->file_info_lock.
+ *
+ * If @wait_for_oplock_handler is true and we are releasing the last
+ * reference, wait for any running oplock break handler of the file
+ * and cancel any pending one.
+ *
+ * @cifs_file:	cifs/smb3 specific info (eg refcounts) for an open file
+ * @wait_oplock_handler: must be false if called from oplock_break_handler
+ * @offload:	not offloaded on close and oplock breaks
+ *
+ */
+void _cifsFileInfo_put(struct cifsFileInfo *cifs_file,
+		       bool wait_oplock_handler, bool offload)
+{
+	struct inode *inode = d_inode(cifs_file->dentry);
+	struct cifs_tcon *tcon = tlink_tcon(cifs_file->tlink);
+	struct TCP_Server_Info *server = tcon->ses->server;
+	struct cifsInodeInfo *cifsi = CIFS_I(inode);
+	struct super_block *sb = inode->i_sb;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	struct cifs_fid fid = {};
+	struct cifs_pending_open open;
+	bool oplock_break_cancelled;
+
+	spin_lock(&tcon->open_file_lock);
+	spin_lock(&cifsi->open_file_lock);
+	spin_lock(&cifs_file->file_info_lock);
+	if (--cifs_file->count > 0) {
+		spin_unlock(&cifs_file->file_info_lock);
+		spin_unlock(&cifsi->open_file_lock);
+		spin_unlock(&tcon->open_file_lock);
+		return;
+	}
+	spin_unlock(&cifs_file->file_info_lock);
+
+	if (server->ops->get_lease_key)
+		server->ops->get_lease_key(inode, &fid);
+
+	/* store open in pending opens to make sure we don't miss lease break */
+	cifs_add_pending_open_locked(&fid, cifs_file->tlink, &open);
+
+	/* remove it from the lists */
+	list_del(&cifs_file->flist);
+	list_del(&cifs_file->tlist);
+	atomic_dec(&tcon->num_local_opens);
+
+	if (list_empty(&cifsi->openFileList)) {
+		cifs_dbg(FYI, "closing last open instance for inode %p\n",
+			 d_inode(cifs_file->dentry));
+		/*
+		 * In strict cache mode we need invalidate mapping on the last
+		 * close  because it may cause a error when we open this file
+		 * again and get at least level II oplock.
+		 */
+		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
+			set_bit(CIFS_INO_INVALID_MAPPING, &cifsi->flags);
+		cifs_set_oplock_level(cifsi, 0);
+	}
+
+	spin_unlock(&cifsi->open_file_lock);
+	spin_unlock(&tcon->open_file_lock);
+
+	oplock_break_cancelled = wait_oplock_handler ?
+		cancel_work_sync(&cifs_file->oplock_break) : false;
+
+	if (!tcon->need_reconnect && !cifs_file->invalidHandle) {
+		struct TCP_Server_Info *server = tcon->ses->server;
+		unsigned int xid;
+
+		xid = get_xid();
+		if (server->ops->close_getattr)
+			server->ops->close_getattr(xid, tcon, cifs_file);
+		else if (server->ops->close)
+			server->ops->close(xid, tcon, &cifs_file->fid);
+		_free_xid(xid);
+	}
+
+	if (oplock_break_cancelled)
+		cifs_done_oplock_break(cifsi);
+
+	cifs_del_pending_open(&open);
+
+	if (offload)
+		queue_work(fileinfo_put_wq, &cifs_file->put);
+	else
+		cifsFileInfo_put_final(cifs_file);
+}
+
+int cifs_open(struct inode *inode, struct file *file)
+
+{
+	int rc = -EACCES;
+	unsigned int xid;
+	__u32 oplock;
+	struct cifs_sb_info *cifs_sb;
+	struct TCP_Server_Info *server;
+	struct cifs_tcon *tcon;
+	struct tcon_link *tlink;
+	struct cifsFileInfo *cfile = NULL;
+	void *page;
+	const char *full_path;
+	bool posix_open_ok = false;
+	struct cifs_fid fid = {};
+	struct cifs_pending_open open;
+	struct cifs_open_info_data data = {};
+
+	xid = get_xid();
+
+	cifs_sb = CIFS_SB(inode->i_sb);
+	if (unlikely(cifs_forced_shutdown(cifs_sb))) {
+		free_xid(xid);
+		return -EIO;
+	}
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink)) {
+		free_xid(xid);
+		return PTR_ERR(tlink);
+	}
+	tcon = tlink_tcon(tlink);
+	server = tcon->ses->server;
+
+	page = alloc_dentry_path();
+	full_path = build_path_from_dentry(file_dentry(file), page);
+	if (IS_ERR(full_path)) {
+		rc = PTR_ERR(full_path);
+		goto out;
+	}
+
+	cifs_dbg(FYI, "inode = 0x%p file flags are 0x%x for %s\n",
+		 inode, file->f_flags, full_path);
+
+	if (file->f_flags & O_DIRECT &&
+	    cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) {
+		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
+			file->f_op = &cifs_file_direct_nobrl_ops;
+		else
+			file->f_op = &cifs_file_direct_ops;
+	}
+
+	/* Get the cached handle as SMB2 close is deferred */
+	rc = cifs_get_readable_path(tcon, full_path, &cfile);
+	if (rc == 0) {
+		if (file->f_flags == cfile->f_flags) {
+			file->private_data = cfile;
+			spin_lock(&CIFS_I(inode)->deferred_lock);
+			cifs_del_deferred_close(cfile);
+			spin_unlock(&CIFS_I(inode)->deferred_lock);
+			goto use_cache;
+		} else {
+			_cifsFileInfo_put(cfile, true, false);
+		}
+	}
+
+	if (server->oplocks)
+		oplock = REQ_OPLOCK;
+	else
+		oplock = 0;
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	if (!tcon->broken_posix_open && tcon->unix_ext &&
+	    cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
+				le64_to_cpu(tcon->fsUnixInfo.Capability))) {
+		/* can not refresh inode info since size could be stale */
+		rc = cifs_posix_open(full_path, &inode, inode->i_sb,
+				cifs_sb->ctx->file_mode /* ignored */,
+				file->f_flags, &oplock, &fid.netfid, xid);
+		if (rc == 0) {
+			cifs_dbg(FYI, "posix open succeeded\n");
+			posix_open_ok = true;
+		} else if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
+			if (tcon->ses->serverNOS)
+				cifs_dbg(VFS, "server %s of type %s returned unexpected error on SMB posix open, disabling posix open support. Check if server update available.\n",
+					 tcon->ses->ip_addr,
+					 tcon->ses->serverNOS);
+			tcon->broken_posix_open = true;
+		} else if ((rc != -EIO) && (rc != -EREMOTE) &&
+			 (rc != -EOPNOTSUPP)) /* path not found or net err */
+			goto out;
+		/*
+		 * Else fallthrough to retry open the old way on network i/o
+		 * or DFS errors.
+		 */
+	}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+	if (server->ops->get_lease_key)
+		server->ops->get_lease_key(inode, &fid);
+
+	cifs_add_pending_open(&fid, tlink, &open);
+
+	if (!posix_open_ok) {
+		if (server->ops->get_lease_key)
+			server->ops->get_lease_key(inode, &fid);
+
+		rc = cifs_nt_open(full_path, inode, cifs_sb, tcon, file->f_flags, &oplock, &fid,
+				  xid, &data);
+		if (rc) {
+			cifs_del_pending_open(&open);
+			goto out;
+		}
+	}
+
+	cfile = cifs_new_fileinfo(&fid, file, tlink, oplock, data.symlink_target);
+	if (cfile == NULL) {
+		if (server->ops->close)
+			server->ops->close(xid, tcon, &fid);
+		cifs_del_pending_open(&open);
+		rc = -ENOMEM;
+		goto out;
+	}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	if ((oplock & CIFS_CREATE_ACTION) && !posix_open_ok && tcon->unix_ext) {
+		/*
+		 * Time to set mode which we can not set earlier due to
+		 * problems creating new read-only files.
+		 */
+		struct cifs_unix_set_info_args args = {
+			.mode	= inode->i_mode,
+			.uid	= INVALID_UID, /* no change */
+			.gid	= INVALID_GID, /* no change */
+			.ctime	= NO_CHANGE_64,
+			.atime	= NO_CHANGE_64,
+			.mtime	= NO_CHANGE_64,
+			.device	= 0,
+		};
+		CIFSSMBUnixSetFileInfo(xid, tcon, &args, fid.netfid,
+				       cfile->pid);
+	}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+use_cache:
+	fscache_use_cookie(cifs_inode_cookie(file_inode(file)),
+			   file->f_mode & FMODE_WRITE);
+	if (file->f_flags & O_DIRECT &&
+	    (!((file->f_flags & O_ACCMODE) != O_RDONLY) ||
+	     file->f_flags & O_APPEND))
+		cifs_invalidate_cache(file_inode(file),
+				      FSCACHE_INVAL_DIO_WRITE);
+
+out:
+	free_dentry_path(page);
+	free_xid(xid);
+	cifs_put_tlink(tlink);
+	cifs_free_open_info(&data);
+	return rc;
+}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+static int cifs_push_posix_locks(struct cifsFileInfo *cfile);
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+/*
+ * Try to reacquire byte range locks that were released when session
+ * to server was lost.
+ */
+static int
+cifs_relock_file(struct cifsFileInfo *cfile)
+{
+	struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
+	struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
+	int rc = 0;
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	struct cifs_sb_info *cifs_sb = CIFS_SB(cfile->dentry->d_sb);
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+	down_read_nested(&cinode->lock_sem, SINGLE_DEPTH_NESTING);
+	if (cinode->can_cache_brlcks) {
+		/* can cache locks - no need to relock */
+		up_read(&cinode->lock_sem);
+		return rc;
+	}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	if (cap_unix(tcon->ses) &&
+	    (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) &&
+	    ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0))
+		rc = cifs_push_posix_locks(cfile);
+	else
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+		rc = tcon->ses->server->ops->push_mand_locks(cfile);
+
+	up_read(&cinode->lock_sem);
+	return rc;
+}
+
+static int
+cifs_reopen_file(struct cifsFileInfo *cfile, bool can_flush)
+{
+	int rc = -EACCES;
+	unsigned int xid;
+	__u32 oplock;
+	struct cifs_sb_info *cifs_sb;
+	struct cifs_tcon *tcon;
+	struct TCP_Server_Info *server;
+	struct cifsInodeInfo *cinode;
+	struct inode *inode;
+	void *page;
+	const char *full_path;
+	int desired_access;
+	int disposition = FILE_OPEN;
+	int create_options = CREATE_NOT_DIR;
+	struct cifs_open_parms oparms;
+
+	xid = get_xid();
+	mutex_lock(&cfile->fh_mutex);
+	if (!cfile->invalidHandle) {
+		mutex_unlock(&cfile->fh_mutex);
+		free_xid(xid);
+		return 0;
+	}
+
+	inode = d_inode(cfile->dentry);
+	cifs_sb = CIFS_SB(inode->i_sb);
+	tcon = tlink_tcon(cfile->tlink);
+	server = tcon->ses->server;
+
+	/*
+	 * Can not grab rename sem here because various ops, including those
+	 * that already have the rename sem can end up causing writepage to get
+	 * called and if the server was down that means we end up here, and we
+	 * can never tell if the caller already has the rename_sem.
+	 */
+	page = alloc_dentry_path();
+	full_path = build_path_from_dentry(cfile->dentry, page);
+	if (IS_ERR(full_path)) {
+		mutex_unlock(&cfile->fh_mutex);
+		free_dentry_path(page);
+		free_xid(xid);
+		return PTR_ERR(full_path);
+	}
+
+	cifs_dbg(FYI, "inode = 0x%p file flags 0x%x for %s\n",
+		 inode, cfile->f_flags, full_path);
+
+	if (tcon->ses->server->oplocks)
+		oplock = REQ_OPLOCK;
+	else
+		oplock = 0;
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	if (tcon->unix_ext && cap_unix(tcon->ses) &&
+	    (CIFS_UNIX_POSIX_PATH_OPS_CAP &
+				le64_to_cpu(tcon->fsUnixInfo.Capability))) {
+		/*
+		 * O_CREAT, O_EXCL and O_TRUNC already had their effect on the
+		 * original open. Must mask them off for a reopen.
+		 */
+		unsigned int oflags = cfile->f_flags &
+						~(O_CREAT | O_EXCL | O_TRUNC);
+
+		rc = cifs_posix_open(full_path, NULL, inode->i_sb,
+				     cifs_sb->ctx->file_mode /* ignored */,
+				     oflags, &oplock, &cfile->fid.netfid, xid);
+		if (rc == 0) {
+			cifs_dbg(FYI, "posix reopen succeeded\n");
+			oparms.reconnect = true;
+			goto reopen_success;
+		}
+		/*
+		 * fallthrough to retry open the old way on errors, especially
+		 * in the reconnect path it is important to retry hard
+		 */
+	}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+	desired_access = cifs_convert_flags(cfile->f_flags);
+
+	/* O_SYNC also has bit for O_DSYNC so following check picks up either */
+	if (cfile->f_flags & O_SYNC)
+		create_options |= CREATE_WRITE_THROUGH;
+
+	if (cfile->f_flags & O_DIRECT)
+		create_options |= CREATE_NO_BUFFER;
+
+	if (server->ops->get_lease_key)
+		server->ops->get_lease_key(inode, &cfile->fid);
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.cifs_sb = cifs_sb,
+		.desired_access = desired_access,
+		.create_options = cifs_create_options(cifs_sb, create_options),
+		.disposition = disposition,
+		.path = full_path,
+		.fid = &cfile->fid,
+		.reconnect = true,
+	};
+
+	/*
+	 * Can not refresh inode by passing in file_info buf to be returned by
+	 * ops->open and then calling get_inode_info with returned buf since
+	 * file might have write behind data that needs to be flushed and server
+	 * version of file size can be stale. If we knew for sure that inode was
+	 * not dirty locally we could do this.
+	 */
+	rc = server->ops->open(xid, &oparms, &oplock, NULL);
+	if (rc == -ENOENT && oparms.reconnect == false) {
+		/* durable handle timeout is expired - open the file again */
+		rc = server->ops->open(xid, &oparms, &oplock, NULL);
+		/* indicate that we need to relock the file */
+		oparms.reconnect = true;
+	}
+
+	if (rc) {
+		mutex_unlock(&cfile->fh_mutex);
+		cifs_dbg(FYI, "cifs_reopen returned 0x%x\n", rc);
+		cifs_dbg(FYI, "oplock: %d\n", oplock);
+		goto reopen_error_exit;
+	}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+reopen_success:
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+	cfile->invalidHandle = false;
+	mutex_unlock(&cfile->fh_mutex);
+	cinode = CIFS_I(inode);
+
+	if (can_flush) {
+		rc = filemap_write_and_wait(inode->i_mapping);
+		if (!is_interrupt_error(rc))
+			mapping_set_error(inode->i_mapping, rc);
+
+		if (tcon->posix_extensions)
+			rc = smb311_posix_get_inode_info(&inode, full_path, inode->i_sb, xid);
+		else if (tcon->unix_ext)
+			rc = cifs_get_inode_info_unix(&inode, full_path,
+						      inode->i_sb, xid);
+		else
+			rc = cifs_get_inode_info(&inode, full_path, NULL,
+						 inode->i_sb, xid, NULL);
+	}
+	/*
+	 * Else we are writing out data to server already and could deadlock if
+	 * we tried to flush data, and since we do not know if we have data that
+	 * would invalidate the current end of file on the server we can not go
+	 * to the server to get the new inode info.
+	 */
+
+	/*
+	 * If the server returned a read oplock and we have mandatory brlocks,
+	 * set oplock level to None.
+	 */
+	if (server->ops->is_read_op(oplock) && cifs_has_mand_locks(cinode)) {
+		cifs_dbg(FYI, "Reset oplock val from read to None due to mand locks\n");
+		oplock = 0;
+	}
+
+	server->ops->set_fid(cfile, &cfile->fid, oplock);
+	if (oparms.reconnect)
+		cifs_relock_file(cfile);
+
+reopen_error_exit:
+	free_dentry_path(page);
+	free_xid(xid);
+	return rc;
+}
+
+void smb2_deferred_work_close(struct work_struct *work)
+{
+	struct cifsFileInfo *cfile = container_of(work,
+			struct cifsFileInfo, deferred.work);
+
+	spin_lock(&CIFS_I(d_inode(cfile->dentry))->deferred_lock);
+	cifs_del_deferred_close(cfile);
+	cfile->deferred_close_scheduled = false;
+	spin_unlock(&CIFS_I(d_inode(cfile->dentry))->deferred_lock);
+	_cifsFileInfo_put(cfile, true, false);
+}
+
+int cifs_close(struct inode *inode, struct file *file)
+{
+	struct cifsFileInfo *cfile;
+	struct cifsInodeInfo *cinode = CIFS_I(inode);
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct cifs_deferred_close *dclose;
+
+	cifs_fscache_unuse_inode_cookie(inode, file->f_mode & FMODE_WRITE);
+
+	if (file->private_data != NULL) {
+		cfile = file->private_data;
+		file->private_data = NULL;
+		dclose = kmalloc(sizeof(struct cifs_deferred_close), GFP_KERNEL);
+		if ((cifs_sb->ctx->closetimeo && cinode->oplock == CIFS_CACHE_RHW_FLG)
+		    && cinode->lease_granted &&
+		    !test_bit(CIFS_INO_CLOSE_ON_LOCK, &cinode->flags) &&
+		    dclose) {
+			if (test_and_clear_bit(CIFS_INO_MODIFIED_ATTR, &cinode->flags)) {
+				inode_set_mtime_to_ts(inode,
+						      inode_set_ctime_current(inode));
+			}
+			spin_lock(&cinode->deferred_lock);
+			cifs_add_deferred_close(cfile, dclose);
+			if (cfile->deferred_close_scheduled &&
+			    delayed_work_pending(&cfile->deferred)) {
+				/*
+				 * If there is no pending work, mod_delayed_work queues new work.
+				 * So, Increase the ref count to avoid use-after-free.
+				 */
+				if (!mod_delayed_work(deferredclose_wq,
+						&cfile->deferred, cifs_sb->ctx->closetimeo))
+					cifsFileInfo_get(cfile);
+			} else {
+				/* Deferred close for files */
+				queue_delayed_work(deferredclose_wq,
+						&cfile->deferred, cifs_sb->ctx->closetimeo);
+				cfile->deferred_close_scheduled = true;
+				spin_unlock(&cinode->deferred_lock);
+				return 0;
+			}
+			spin_unlock(&cinode->deferred_lock);
+			_cifsFileInfo_put(cfile, true, false);
+		} else {
+			_cifsFileInfo_put(cfile, true, false);
+			kfree(dclose);
+		}
+	}
+
+	/* return code from the ->release op is always ignored */
+	return 0;
+}
+
+void
+cifs_reopen_persistent_handles(struct cifs_tcon *tcon)
+{
+	struct cifsFileInfo *open_file, *tmp;
+	struct list_head tmp_list;
+
+	if (!tcon->use_persistent || !tcon->need_reopen_files)
+		return;
+
+	tcon->need_reopen_files = false;
+
+	cifs_dbg(FYI, "Reopen persistent handles\n");
+	INIT_LIST_HEAD(&tmp_list);
+
+	/* list all files open on tree connection, reopen resilient handles  */
+	spin_lock(&tcon->open_file_lock);
+	list_for_each_entry(open_file, &tcon->openFileList, tlist) {
+		if (!open_file->invalidHandle)
+			continue;
+		cifsFileInfo_get(open_file);
+		list_add_tail(&open_file->rlist, &tmp_list);
+	}
+	spin_unlock(&tcon->open_file_lock);
+
+	list_for_each_entry_safe(open_file, tmp, &tmp_list, rlist) {
+		if (cifs_reopen_file(open_file, false /* do not flush */))
+			tcon->need_reopen_files = true;
+		list_del_init(&open_file->rlist);
+		cifsFileInfo_put(open_file);
+	}
+}
+
+int cifs_closedir(struct inode *inode, struct file *file)
+{
+	int rc = 0;
+	unsigned int xid;
+	struct cifsFileInfo *cfile = file->private_data;
+	struct cifs_tcon *tcon;
+	struct TCP_Server_Info *server;
+	char *buf;
+
+	cifs_dbg(FYI, "Closedir inode = 0x%p\n", inode);
+
+	if (cfile == NULL)
+		return rc;
+
+	xid = get_xid();
+	tcon = tlink_tcon(cfile->tlink);
+	server = tcon->ses->server;
+
+	cifs_dbg(FYI, "Freeing private data in close dir\n");
+	spin_lock(&cfile->file_info_lock);
+	if (server->ops->dir_needs_close(cfile)) {
+		cfile->invalidHandle = true;
+		spin_unlock(&cfile->file_info_lock);
+		if (server->ops->close_dir)
+			rc = server->ops->close_dir(xid, tcon, &cfile->fid);
+		else
+			rc = -ENOSYS;
+		cifs_dbg(FYI, "Closing uncompleted readdir with rc %d\n", rc);
+		/* not much we can do if it fails anyway, ignore rc */
+		rc = 0;
+	} else
+		spin_unlock(&cfile->file_info_lock);
+
+	buf = cfile->srch_inf.ntwrk_buf_start;
+	if (buf) {
+		cifs_dbg(FYI, "closedir free smb buf in srch struct\n");
+		cfile->srch_inf.ntwrk_buf_start = NULL;
+		if (cfile->srch_inf.smallBuf)
+			cifs_small_buf_release(buf);
+		else
+			cifs_buf_release(buf);
+	}
+
+	cifs_put_tlink(cfile->tlink);
+	kfree(file->private_data);
+	file->private_data = NULL;
+	/* BB can we lock the filestruct while this is going on? */
+	free_xid(xid);
+	return rc;
+}
+
+static struct cifsLockInfo *
+cifs_lock_init(__u64 offset, __u64 length, __u8 type, __u16 flags)
+{
+	struct cifsLockInfo *lock =
+		kmalloc(sizeof(struct cifsLockInfo), GFP_KERNEL);
+	if (!lock)
+		return lock;
+	lock->offset = offset;
+	lock->length = length;
+	lock->type = type;
+	lock->pid = current->tgid;
+	lock->flags = flags;
+	INIT_LIST_HEAD(&lock->blist);
+	init_waitqueue_head(&lock->block_q);
+	return lock;
+}
+
+void
+cifs_del_lock_waiters(struct cifsLockInfo *lock)
+{
+	struct cifsLockInfo *li, *tmp;
+	list_for_each_entry_safe(li, tmp, &lock->blist, blist) {
+		list_del_init(&li->blist);
+		wake_up(&li->block_q);
+	}
+}
+
+#define CIFS_LOCK_OP	0
+#define CIFS_READ_OP	1
+#define CIFS_WRITE_OP	2
+
+/* @rw_check : 0 - no op, 1 - read, 2 - write */
+static bool
+cifs_find_fid_lock_conflict(struct cifs_fid_locks *fdlocks, __u64 offset,
+			    __u64 length, __u8 type, __u16 flags,
+			    struct cifsFileInfo *cfile,
+			    struct cifsLockInfo **conf_lock, int rw_check)
+{
+	struct cifsLockInfo *li;
+	struct cifsFileInfo *cur_cfile = fdlocks->cfile;
+	struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
+
+	list_for_each_entry(li, &fdlocks->locks, llist) {
+		if (offset + length <= li->offset ||
+		    offset >= li->offset + li->length)
+			continue;
+		if (rw_check != CIFS_LOCK_OP && current->tgid == li->pid &&
+		    server->ops->compare_fids(cfile, cur_cfile)) {
+			/* shared lock prevents write op through the same fid */
+			if (!(li->type & server->vals->shared_lock_type) ||
+			    rw_check != CIFS_WRITE_OP)
+				continue;
+		}
+		if ((type & server->vals->shared_lock_type) &&
+		    ((server->ops->compare_fids(cfile, cur_cfile) &&
+		     current->tgid == li->pid) || type == li->type))
+			continue;
+		if (rw_check == CIFS_LOCK_OP &&
+		    (flags & FL_OFDLCK) && (li->flags & FL_OFDLCK) &&
+		    server->ops->compare_fids(cfile, cur_cfile))
+			continue;
+		if (conf_lock)
+			*conf_lock = li;
+		return true;
+	}
+	return false;
+}
+
+bool
+cifs_find_lock_conflict(struct cifsFileInfo *cfile, __u64 offset, __u64 length,
+			__u8 type, __u16 flags,
+			struct cifsLockInfo **conf_lock, int rw_check)
+{
+	bool rc = false;
+	struct cifs_fid_locks *cur;
+	struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
+
+	list_for_each_entry(cur, &cinode->llist, llist) {
+		rc = cifs_find_fid_lock_conflict(cur, offset, length, type,
+						 flags, cfile, conf_lock,
+						 rw_check);
+		if (rc)
+			break;
+	}
+
+	return rc;
+}
+
+/*
+ * Check if there is another lock that prevents us to set the lock (mandatory
+ * style). If such a lock exists, update the flock structure with its
+ * properties. Otherwise, set the flock type to F_UNLCK if we can cache brlocks
+ * or leave it the same if we can't. Returns 0 if we don't need to request to
+ * the server or 1 otherwise.
+ */
+static int
+cifs_lock_test(struct cifsFileInfo *cfile, __u64 offset, __u64 length,
+	       __u8 type, struct file_lock *flock)
+{
+	int rc = 0;
+	struct cifsLockInfo *conf_lock;
+	struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
+	struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
+	bool exist;
+
+	down_read(&cinode->lock_sem);
+
+	exist = cifs_find_lock_conflict(cfile, offset, length, type,
+					flock->fl_flags, &conf_lock,
+					CIFS_LOCK_OP);
+	if (exist) {
+		flock->fl_start = conf_lock->offset;
+		flock->fl_end = conf_lock->offset + conf_lock->length - 1;
+		flock->fl_pid = conf_lock->pid;
+		if (conf_lock->type & server->vals->shared_lock_type)
+			flock->fl_type = F_RDLCK;
+		else
+			flock->fl_type = F_WRLCK;
+	} else if (!cinode->can_cache_brlcks)
+		rc = 1;
+	else
+		flock->fl_type = F_UNLCK;
+
+	up_read(&cinode->lock_sem);
+	return rc;
+}
+
+static void
+cifs_lock_add(struct cifsFileInfo *cfile, struct cifsLockInfo *lock)
+{
+	struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
+	cifs_down_write(&cinode->lock_sem);
+	list_add_tail(&lock->llist, &cfile->llist->locks);
+	up_write(&cinode->lock_sem);
+}
+
+/*
+ * Set the byte-range lock (mandatory style). Returns:
+ * 1) 0, if we set the lock and don't need to request to the server;
+ * 2) 1, if no locks prevent us but we need to request to the server;
+ * 3) -EACCES, if there is a lock that prevents us and wait is false.
+ */
+static int
+cifs_lock_add_if(struct cifsFileInfo *cfile, struct cifsLockInfo *lock,
+		 bool wait)
+{
+	struct cifsLockInfo *conf_lock;
+	struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
+	bool exist;
+	int rc = 0;
+
+try_again:
+	exist = false;
+	cifs_down_write(&cinode->lock_sem);
+
+	exist = cifs_find_lock_conflict(cfile, lock->offset, lock->length,
+					lock->type, lock->flags, &conf_lock,
+					CIFS_LOCK_OP);
+	if (!exist && cinode->can_cache_brlcks) {
+		list_add_tail(&lock->llist, &cfile->llist->locks);
+		up_write(&cinode->lock_sem);
+		return rc;
+	}
+
+	if (!exist)
+		rc = 1;
+	else if (!wait)
+		rc = -EACCES;
+	else {
+		list_add_tail(&lock->blist, &conf_lock->blist);
+		up_write(&cinode->lock_sem);
+		rc = wait_event_interruptible(lock->block_q,
+					(lock->blist.prev == &lock->blist) &&
+					(lock->blist.next == &lock->blist));
+		if (!rc)
+			goto try_again;
+		cifs_down_write(&cinode->lock_sem);
+		list_del_init(&lock->blist);
+	}
+
+	up_write(&cinode->lock_sem);
+	return rc;
+}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+/*
+ * Check if there is another lock that prevents us to set the lock (posix
+ * style). If such a lock exists, update the flock structure with its
+ * properties. Otherwise, set the flock type to F_UNLCK if we can cache brlocks
+ * or leave it the same if we can't. Returns 0 if we don't need to request to
+ * the server or 1 otherwise.
+ */
+static int
+cifs_posix_lock_test(struct file *file, struct file_lock *flock)
+{
+	int rc = 0;
+	struct cifsInodeInfo *cinode = CIFS_I(file_inode(file));
+	unsigned char saved_type = flock->fl_type;
+
+	if ((flock->fl_flags & FL_POSIX) == 0)
+		return 1;
+
+	down_read(&cinode->lock_sem);
+	posix_test_lock(file, flock);
+
+	if (flock->fl_type == F_UNLCK && !cinode->can_cache_brlcks) {
+		flock->fl_type = saved_type;
+		rc = 1;
+	}
+
+	up_read(&cinode->lock_sem);
+	return rc;
+}
+
+/*
+ * Set the byte-range lock (posix style). Returns:
+ * 1) <0, if the error occurs while setting the lock;
+ * 2) 0, if we set the lock and don't need to request to the server;
+ * 3) FILE_LOCK_DEFERRED, if we will wait for some other file_lock;
+ * 4) FILE_LOCK_DEFERRED + 1, if we need to request to the server.
+ */
+static int
+cifs_posix_lock_set(struct file *file, struct file_lock *flock)
+{
+	struct cifsInodeInfo *cinode = CIFS_I(file_inode(file));
+	int rc = FILE_LOCK_DEFERRED + 1;
+
+	if ((flock->fl_flags & FL_POSIX) == 0)
+		return rc;
+
+	cifs_down_write(&cinode->lock_sem);
+	if (!cinode->can_cache_brlcks) {
+		up_write(&cinode->lock_sem);
+		return rc;
+	}
+
+	rc = posix_lock_file(file, flock, NULL);
+	up_write(&cinode->lock_sem);
+	return rc;
+}
+
+int
+cifs_push_mandatory_locks(struct cifsFileInfo *cfile)
+{
+	unsigned int xid;
+	int rc = 0, stored_rc;
+	struct cifsLockInfo *li, *tmp;
+	struct cifs_tcon *tcon;
+	unsigned int num, max_num, max_buf;
+	LOCKING_ANDX_RANGE *buf, *cur;
+	static const int types[] = {
+		LOCKING_ANDX_LARGE_FILES,
+		LOCKING_ANDX_SHARED_LOCK | LOCKING_ANDX_LARGE_FILES
+	};
+	int i;
+
+	xid = get_xid();
+	tcon = tlink_tcon(cfile->tlink);
+
+	/*
+	 * Accessing maxBuf is racy with cifs_reconnect - need to store value
+	 * and check it before using.
+	 */
+	max_buf = tcon->ses->server->maxBuf;
+	if (max_buf < (sizeof(struct smb_hdr) + sizeof(LOCKING_ANDX_RANGE))) {
+		free_xid(xid);
+		return -EINVAL;
+	}
+
+	BUILD_BUG_ON(sizeof(struct smb_hdr) + sizeof(LOCKING_ANDX_RANGE) >
+		     PAGE_SIZE);
+	max_buf = min_t(unsigned int, max_buf - sizeof(struct smb_hdr),
+			PAGE_SIZE);
+	max_num = (max_buf - sizeof(struct smb_hdr)) /
+						sizeof(LOCKING_ANDX_RANGE);
+	buf = kcalloc(max_num, sizeof(LOCKING_ANDX_RANGE), GFP_KERNEL);
+	if (!buf) {
+		free_xid(xid);
+		return -ENOMEM;
+	}
+
+	for (i = 0; i < 2; i++) {
+		cur = buf;
+		num = 0;
+		list_for_each_entry_safe(li, tmp, &cfile->llist->locks, llist) {
+			if (li->type != types[i])
+				continue;
+			cur->Pid = cpu_to_le16(li->pid);
+			cur->LengthLow = cpu_to_le32((u32)li->length);
+			cur->LengthHigh = cpu_to_le32((u32)(li->length>>32));
+			cur->OffsetLow = cpu_to_le32((u32)li->offset);
+			cur->OffsetHigh = cpu_to_le32((u32)(li->offset>>32));
+			if (++num == max_num) {
+				stored_rc = cifs_lockv(xid, tcon,
+						       cfile->fid.netfid,
+						       (__u8)li->type, 0, num,
+						       buf);
+				if (stored_rc)
+					rc = stored_rc;
+				cur = buf;
+				num = 0;
+			} else
+				cur++;
+		}
+
+		if (num) {
+			stored_rc = cifs_lockv(xid, tcon, cfile->fid.netfid,
+					       (__u8)types[i], 0, num, buf);
+			if (stored_rc)
+				rc = stored_rc;
+		}
+	}
+
+	kfree(buf);
+	free_xid(xid);
+	return rc;
+}
+
+static __u32
+hash_lockowner(fl_owner_t owner)
+{
+	return cifs_lock_secret ^ hash32_ptr((const void *)owner);
+}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+struct lock_to_push {
+	struct list_head llist;
+	__u64 offset;
+	__u64 length;
+	__u32 pid;
+	__u16 netfid;
+	__u8 type;
+};
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+static int
+cifs_push_posix_locks(struct cifsFileInfo *cfile)
+{
+	struct inode *inode = d_inode(cfile->dentry);
+	struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
+	struct file_lock *flock;
+	struct file_lock_context *flctx = locks_inode_context(inode);
+	unsigned int count = 0, i;
+	int rc = 0, xid, type;
+	struct list_head locks_to_send, *el;
+	struct lock_to_push *lck, *tmp;
+	__u64 length;
+
+	xid = get_xid();
+
+	if (!flctx)
+		goto out;
+
+	spin_lock(&flctx->flc_lock);
+	list_for_each(el, &flctx->flc_posix) {
+		count++;
+	}
+	spin_unlock(&flctx->flc_lock);
+
+	INIT_LIST_HEAD(&locks_to_send);
+
+	/*
+	 * Allocating count locks is enough because no FL_POSIX locks can be
+	 * added to the list while we are holding cinode->lock_sem that
+	 * protects locking operations of this inode.
+	 */
+	for (i = 0; i < count; i++) {
+		lck = kmalloc(sizeof(struct lock_to_push), GFP_KERNEL);
+		if (!lck) {
+			rc = -ENOMEM;
+			goto err_out;
+		}
+		list_add_tail(&lck->llist, &locks_to_send);
+	}
+
+	el = locks_to_send.next;
+	spin_lock(&flctx->flc_lock);
+	list_for_each_entry(flock, &flctx->flc_posix, fl_list) {
+		if (el == &locks_to_send) {
+			/*
+			 * The list ended. We don't have enough allocated
+			 * structures - something is really wrong.
+			 */
+			cifs_dbg(VFS, "Can't push all brlocks!\n");
+			break;
+		}
+		length = cifs_flock_len(flock);
+		if (flock->fl_type == F_RDLCK || flock->fl_type == F_SHLCK)
+			type = CIFS_RDLCK;
+		else
+			type = CIFS_WRLCK;
+		lck = list_entry(el, struct lock_to_push, llist);
+		lck->pid = hash_lockowner(flock->fl_owner);
+		lck->netfid = cfile->fid.netfid;
+		lck->length = length;
+		lck->type = type;
+		lck->offset = flock->fl_start;
+	}
+	spin_unlock(&flctx->flc_lock);
+
+	list_for_each_entry_safe(lck, tmp, &locks_to_send, llist) {
+		int stored_rc;
+
+		stored_rc = CIFSSMBPosixLock(xid, tcon, lck->netfid, lck->pid,
+					     lck->offset, lck->length, NULL,
+					     lck->type, 0);
+		if (stored_rc)
+			rc = stored_rc;
+		list_del(&lck->llist);
+		kfree(lck);
+	}
+
+out:
+	free_xid(xid);
+	return rc;
+err_out:
+	list_for_each_entry_safe(lck, tmp, &locks_to_send, llist) {
+		list_del(&lck->llist);
+		kfree(lck);
+	}
+	goto out;
+}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+static int
+cifs_push_locks(struct cifsFileInfo *cfile)
+{
+	struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
+	struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
+	int rc = 0;
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	struct cifs_sb_info *cifs_sb = CIFS_SB(cfile->dentry->d_sb);
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+	/* we are going to update can_cache_brlcks here - need a write access */
+	cifs_down_write(&cinode->lock_sem);
+	if (!cinode->can_cache_brlcks) {
+		up_write(&cinode->lock_sem);
+		return rc;
+	}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	if (cap_unix(tcon->ses) &&
+	    (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) &&
+	    ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0))
+		rc = cifs_push_posix_locks(cfile);
+	else
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+		rc = tcon->ses->server->ops->push_mand_locks(cfile);
+
+	cinode->can_cache_brlcks = false;
+	up_write(&cinode->lock_sem);
+	return rc;
+}
+
+static void
+cifs_read_flock(struct file_lock *flock, __u32 *type, int *lock, int *unlock,
+		bool *wait_flag, struct TCP_Server_Info *server)
+{
+	if (flock->fl_flags & FL_POSIX)
+		cifs_dbg(FYI, "Posix\n");
+	if (flock->fl_flags & FL_FLOCK)
+		cifs_dbg(FYI, "Flock\n");
+	if (flock->fl_flags & FL_SLEEP) {
+		cifs_dbg(FYI, "Blocking lock\n");
+		*wait_flag = true;
+	}
+	if (flock->fl_flags & FL_ACCESS)
+		cifs_dbg(FYI, "Process suspended by mandatory locking - not implemented yet\n");
+	if (flock->fl_flags & FL_LEASE)
+		cifs_dbg(FYI, "Lease on file - not implemented yet\n");
+	if (flock->fl_flags &
+	    (~(FL_POSIX | FL_FLOCK | FL_SLEEP |
+	       FL_ACCESS | FL_LEASE | FL_CLOSE | FL_OFDLCK)))
+		cifs_dbg(FYI, "Unknown lock flags 0x%x\n", flock->fl_flags);
+
+	*type = server->vals->large_lock_type;
+	if (flock->fl_type == F_WRLCK) {
+		cifs_dbg(FYI, "F_WRLCK\n");
+		*type |= server->vals->exclusive_lock_type;
+		*lock = 1;
+	} else if (flock->fl_type == F_UNLCK) {
+		cifs_dbg(FYI, "F_UNLCK\n");
+		*type |= server->vals->unlock_lock_type;
+		*unlock = 1;
+		/* Check if unlock includes more than one lock range */
+	} else if (flock->fl_type == F_RDLCK) {
+		cifs_dbg(FYI, "F_RDLCK\n");
+		*type |= server->vals->shared_lock_type;
+		*lock = 1;
+	} else if (flock->fl_type == F_EXLCK) {
+		cifs_dbg(FYI, "F_EXLCK\n");
+		*type |= server->vals->exclusive_lock_type;
+		*lock = 1;
+	} else if (flock->fl_type == F_SHLCK) {
+		cifs_dbg(FYI, "F_SHLCK\n");
+		*type |= server->vals->shared_lock_type;
+		*lock = 1;
+	} else
+		cifs_dbg(FYI, "Unknown type of lock\n");
+}
+
+static int
+cifs_getlk(struct file *file, struct file_lock *flock, __u32 type,
+	   bool wait_flag, bool posix_lck, unsigned int xid)
+{
+	int rc = 0;
+	__u64 length = cifs_flock_len(flock);
+	struct cifsFileInfo *cfile = (struct cifsFileInfo *)file->private_data;
+	struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
+	struct TCP_Server_Info *server = tcon->ses->server;
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	__u16 netfid = cfile->fid.netfid;
+
+	if (posix_lck) {
+		int posix_lock_type;
+
+		rc = cifs_posix_lock_test(file, flock);
+		if (!rc)
+			return rc;
+
+		if (type & server->vals->shared_lock_type)
+			posix_lock_type = CIFS_RDLCK;
+		else
+			posix_lock_type = CIFS_WRLCK;
+		rc = CIFSSMBPosixLock(xid, tcon, netfid,
+				      hash_lockowner(flock->fl_owner),
+				      flock->fl_start, length, flock,
+				      posix_lock_type, wait_flag);
+		return rc;
+	}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+	rc = cifs_lock_test(cfile, flock->fl_start, length, type, flock);
+	if (!rc)
+		return rc;
+
+	/* BB we could chain these into one lock request BB */
+	rc = server->ops->mand_lock(xid, cfile, flock->fl_start, length, type,
+				    1, 0, false);
+	if (rc == 0) {
+		rc = server->ops->mand_lock(xid, cfile, flock->fl_start, length,
+					    type, 0, 1, false);
+		flock->fl_type = F_UNLCK;
+		if (rc != 0)
+			cifs_dbg(VFS, "Error unlocking previously locked range %d during test of lock\n",
+				 rc);
+		return 0;
+	}
+
+	if (type & server->vals->shared_lock_type) {
+		flock->fl_type = F_WRLCK;
+		return 0;
+	}
+
+	type &= ~server->vals->exclusive_lock_type;
+
+	rc = server->ops->mand_lock(xid, cfile, flock->fl_start, length,
+				    type | server->vals->shared_lock_type,
+				    1, 0, false);
+	if (rc == 0) {
+		rc = server->ops->mand_lock(xid, cfile, flock->fl_start, length,
+			type | server->vals->shared_lock_type, 0, 1, false);
+		flock->fl_type = F_RDLCK;
+		if (rc != 0)
+			cifs_dbg(VFS, "Error unlocking previously locked range %d during test of lock\n",
+				 rc);
+	} else
+		flock->fl_type = F_WRLCK;
+
+	return 0;
+}
+
+void
+cifs_move_llist(struct list_head *source, struct list_head *dest)
+{
+	struct list_head *li, *tmp;
+	list_for_each_safe(li, tmp, source)
+		list_move(li, dest);
+}
+
+void
+cifs_free_llist(struct list_head *llist)
+{
+	struct cifsLockInfo *li, *tmp;
+	list_for_each_entry_safe(li, tmp, llist, llist) {
+		cifs_del_lock_waiters(li);
+		list_del(&li->llist);
+		kfree(li);
+	}
+}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+int
+cifs_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock,
+		  unsigned int xid)
+{
+	int rc = 0, stored_rc;
+	static const int types[] = {
+		LOCKING_ANDX_LARGE_FILES,
+		LOCKING_ANDX_SHARED_LOCK | LOCKING_ANDX_LARGE_FILES
+	};
+	unsigned int i;
+	unsigned int max_num, num, max_buf;
+	LOCKING_ANDX_RANGE *buf, *cur;
+	struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
+	struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
+	struct cifsLockInfo *li, *tmp;
+	__u64 length = cifs_flock_len(flock);
+	struct list_head tmp_llist;
+
+	INIT_LIST_HEAD(&tmp_llist);
+
+	/*
+	 * Accessing maxBuf is racy with cifs_reconnect - need to store value
+	 * and check it before using.
+	 */
+	max_buf = tcon->ses->server->maxBuf;
+	if (max_buf < (sizeof(struct smb_hdr) + sizeof(LOCKING_ANDX_RANGE)))
+		return -EINVAL;
+
+	BUILD_BUG_ON(sizeof(struct smb_hdr) + sizeof(LOCKING_ANDX_RANGE) >
+		     PAGE_SIZE);
+	max_buf = min_t(unsigned int, max_buf - sizeof(struct smb_hdr),
+			PAGE_SIZE);
+	max_num = (max_buf - sizeof(struct smb_hdr)) /
+						sizeof(LOCKING_ANDX_RANGE);
+	buf = kcalloc(max_num, sizeof(LOCKING_ANDX_RANGE), GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	cifs_down_write(&cinode->lock_sem);
+	for (i = 0; i < 2; i++) {
+		cur = buf;
+		num = 0;
+		list_for_each_entry_safe(li, tmp, &cfile->llist->locks, llist) {
+			if (flock->fl_start > li->offset ||
+			    (flock->fl_start + length) <
+			    (li->offset + li->length))
+				continue;
+			if (current->tgid != li->pid)
+				continue;
+			if (types[i] != li->type)
+				continue;
+			if (cinode->can_cache_brlcks) {
+				/*
+				 * We can cache brlock requests - simply remove
+				 * a lock from the file's list.
+				 */
+				list_del(&li->llist);
+				cifs_del_lock_waiters(li);
+				kfree(li);
+				continue;
+			}
+			cur->Pid = cpu_to_le16(li->pid);
+			cur->LengthLow = cpu_to_le32((u32)li->length);
+			cur->LengthHigh = cpu_to_le32((u32)(li->length>>32));
+			cur->OffsetLow = cpu_to_le32((u32)li->offset);
+			cur->OffsetHigh = cpu_to_le32((u32)(li->offset>>32));
+			/*
+			 * We need to save a lock here to let us add it again to
+			 * the file's list if the unlock range request fails on
+			 * the server.
+			 */
+			list_move(&li->llist, &tmp_llist);
+			if (++num == max_num) {
+				stored_rc = cifs_lockv(xid, tcon,
+						       cfile->fid.netfid,
+						       li->type, num, 0, buf);
+				if (stored_rc) {
+					/*
+					 * We failed on the unlock range
+					 * request - add all locks from the tmp
+					 * list to the head of the file's list.
+					 */
+					cifs_move_llist(&tmp_llist,
+							&cfile->llist->locks);
+					rc = stored_rc;
+				} else
+					/*
+					 * The unlock range request succeed -
+					 * free the tmp list.
+					 */
+					cifs_free_llist(&tmp_llist);
+				cur = buf;
+				num = 0;
+			} else
+				cur++;
+		}
+		if (num) {
+			stored_rc = cifs_lockv(xid, tcon, cfile->fid.netfid,
+					       types[i], num, 0, buf);
+			if (stored_rc) {
+				cifs_move_llist(&tmp_llist,
+						&cfile->llist->locks);
+				rc = stored_rc;
+			} else
+				cifs_free_llist(&tmp_llist);
+		}
+	}
+
+	up_write(&cinode->lock_sem);
+	kfree(buf);
+	return rc;
+}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+static int
+cifs_setlk(struct file *file, struct file_lock *flock, __u32 type,
+	   bool wait_flag, bool posix_lck, int lock, int unlock,
+	   unsigned int xid)
+{
+	int rc = 0;
+	__u64 length = cifs_flock_len(flock);
+	struct cifsFileInfo *cfile = (struct cifsFileInfo *)file->private_data;
+	struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
+	struct TCP_Server_Info *server = tcon->ses->server;
+	struct inode *inode = d_inode(cfile->dentry);
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	if (posix_lck) {
+		int posix_lock_type;
+
+		rc = cifs_posix_lock_set(file, flock);
+		if (rc <= FILE_LOCK_DEFERRED)
+			return rc;
+
+		if (type & server->vals->shared_lock_type)
+			posix_lock_type = CIFS_RDLCK;
+		else
+			posix_lock_type = CIFS_WRLCK;
+
+		if (unlock == 1)
+			posix_lock_type = CIFS_UNLCK;
+
+		rc = CIFSSMBPosixLock(xid, tcon, cfile->fid.netfid,
+				      hash_lockowner(flock->fl_owner),
+				      flock->fl_start, length,
+				      NULL, posix_lock_type, wait_flag);
+		goto out;
+	}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+	if (lock) {
+		struct cifsLockInfo *lock;
+
+		lock = cifs_lock_init(flock->fl_start, length, type,
+				      flock->fl_flags);
+		if (!lock)
+			return -ENOMEM;
+
+		rc = cifs_lock_add_if(cfile, lock, wait_flag);
+		if (rc < 0) {
+			kfree(lock);
+			return rc;
+		}
+		if (!rc)
+			goto out;
+
+		/*
+		 * Windows 7 server can delay breaking lease from read to None
+		 * if we set a byte-range lock on a file - break it explicitly
+		 * before sending the lock to the server to be sure the next
+		 * read won't conflict with non-overlapted locks due to
+		 * pagereading.
+		 */
+		if (!CIFS_CACHE_WRITE(CIFS_I(inode)) &&
+					CIFS_CACHE_READ(CIFS_I(inode))) {
+			cifs_zap_mapping(inode);
+			cifs_dbg(FYI, "Set no oplock for inode=%p due to mand locks\n",
+				 inode);
+			CIFS_I(inode)->oplock = 0;
+		}
+
+		rc = server->ops->mand_lock(xid, cfile, flock->fl_start, length,
+					    type, 1, 0, wait_flag);
+		if (rc) {
+			kfree(lock);
+			return rc;
+		}
+
+		cifs_lock_add(cfile, lock);
+	} else if (unlock)
+		rc = server->ops->mand_unlock_range(cfile, flock, xid);
+
+out:
+	if ((flock->fl_flags & FL_POSIX) || (flock->fl_flags & FL_FLOCK)) {
+		/*
+		 * If this is a request to remove all locks because we
+		 * are closing the file, it doesn't matter if the
+		 * unlocking failed as both cifs.ko and the SMB server
+		 * remove the lock on file close
+		 */
+		if (rc) {
+			cifs_dbg(VFS, "%s failed rc=%d\n", __func__, rc);
+			if (!(flock->fl_flags & FL_CLOSE))
+				return rc;
+		}
+		rc = locks_lock_file_wait(file, flock);
+	}
+	return rc;
+}
+
+int cifs_flock(struct file *file, int cmd, struct file_lock *fl)
+{
+	int rc, xid;
+	int lock = 0, unlock = 0;
+	bool wait_flag = false;
+	bool posix_lck = false;
+	struct cifs_sb_info *cifs_sb;
+	struct cifs_tcon *tcon;
+	struct cifsFileInfo *cfile;
+	__u32 type;
+
+	xid = get_xid();
+
+	if (!(fl->fl_flags & FL_FLOCK)) {
+		rc = -ENOLCK;
+		free_xid(xid);
+		return rc;
+	}
+
+	cfile = (struct cifsFileInfo *)file->private_data;
+	tcon = tlink_tcon(cfile->tlink);
+
+	cifs_read_flock(fl, &type, &lock, &unlock, &wait_flag,
+			tcon->ses->server);
+	cifs_sb = CIFS_FILE_SB(file);
+
+	if (cap_unix(tcon->ses) &&
+	    (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) &&
+	    ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0))
+		posix_lck = true;
+
+	if (!lock && !unlock) {
+		/*
+		 * if no lock or unlock then nothing to do since we do not
+		 * know what it is
+		 */
+		rc = -EOPNOTSUPP;
+		free_xid(xid);
+		return rc;
+	}
+
+	rc = cifs_setlk(file, fl, type, wait_flag, posix_lck, lock, unlock,
+			xid);
+	free_xid(xid);
+	return rc;
+
+
+}
+
+int cifs_lock(struct file *file, int cmd, struct file_lock *flock)
+{
+	int rc, xid;
+	int lock = 0, unlock = 0;
+	bool wait_flag = false;
+	bool posix_lck = false;
+	struct cifs_sb_info *cifs_sb;
+	struct cifs_tcon *tcon;
+	struct cifsFileInfo *cfile;
+	__u32 type;
+
+	rc = -EACCES;
+	xid = get_xid();
+
+	cifs_dbg(FYI, "%s: %pD2 cmd=0x%x type=0x%x flags=0x%x r=%lld:%lld\n", __func__, file, cmd,
+		 flock->fl_flags, flock->fl_type, (long long)flock->fl_start,
+		 (long long)flock->fl_end);
+
+	cfile = (struct cifsFileInfo *)file->private_data;
+	tcon = tlink_tcon(cfile->tlink);
+
+	cifs_read_flock(flock, &type, &lock, &unlock, &wait_flag,
+			tcon->ses->server);
+	cifs_sb = CIFS_FILE_SB(file);
+	set_bit(CIFS_INO_CLOSE_ON_LOCK, &CIFS_I(d_inode(cfile->dentry))->flags);
+
+	if (cap_unix(tcon->ses) &&
+	    (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) &&
+	    ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0))
+		posix_lck = true;
+	/*
+	 * BB add code here to normalize offset and length to account for
+	 * negative length which we can not accept over the wire.
+	 */
+	if (IS_GETLK(cmd)) {
+		rc = cifs_getlk(file, flock, type, wait_flag, posix_lck, xid);
+		free_xid(xid);
+		return rc;
+	}
+
+	if (!lock && !unlock) {
+		/*
+		 * if no lock or unlock then nothing to do since we do not
+		 * know what it is
+		 */
+		free_xid(xid);
+		return -EOPNOTSUPP;
+	}
+
+	rc = cifs_setlk(file, flock, type, wait_flag, posix_lck, lock, unlock,
+			xid);
+	free_xid(xid);
+	return rc;
+}
+
+/*
+ * update the file size (if needed) after a write. Should be called with
+ * the inode->i_lock held
+ */
+void
+cifs_update_eof(struct cifsInodeInfo *cifsi, loff_t offset,
+		      unsigned int bytes_written)
+{
+	loff_t end_of_write = offset + bytes_written;
+
+	if (end_of_write > cifsi->server_eof)
+		cifsi->server_eof = end_of_write;
+}
+
+static ssize_t
+cifs_write(struct cifsFileInfo *open_file, __u32 pid, const char *write_data,
+	   size_t write_size, loff_t *offset)
+{
+	int rc = 0;
+	unsigned int bytes_written = 0;
+	unsigned int total_written;
+	struct cifs_tcon *tcon;
+	struct TCP_Server_Info *server;
+	unsigned int xid;
+	struct dentry *dentry = open_file->dentry;
+	struct cifsInodeInfo *cifsi = CIFS_I(d_inode(dentry));
+	struct cifs_io_parms io_parms = {0};
+
+	cifs_dbg(FYI, "write %zd bytes to offset %lld of %pd\n",
+		 write_size, *offset, dentry);
+
+	tcon = tlink_tcon(open_file->tlink);
+	server = tcon->ses->server;
+
+	if (!server->ops->sync_write)
+		return -ENOSYS;
+
+	xid = get_xid();
+
+	for (total_written = 0; write_size > total_written;
+	     total_written += bytes_written) {
+		rc = -EAGAIN;
+		while (rc == -EAGAIN) {
+			struct kvec iov[2];
+			unsigned int len;
+
+			if (open_file->invalidHandle) {
+				/* we could deadlock if we called
+				   filemap_fdatawait from here so tell
+				   reopen_file not to flush data to
+				   server now */
+				rc = cifs_reopen_file(open_file, false);
+				if (rc != 0)
+					break;
+			}
+
+			len = min(server->ops->wp_retry_size(d_inode(dentry)),
+				  (unsigned int)write_size - total_written);
+			/* iov[0] is reserved for smb header */
+			iov[1].iov_base = (char *)write_data + total_written;
+			iov[1].iov_len = len;
+			io_parms.pid = pid;
+			io_parms.tcon = tcon;
+			io_parms.offset = *offset;
+			io_parms.length = len;
+			rc = server->ops->sync_write(xid, &open_file->fid,
+					&io_parms, &bytes_written, iov, 1);
+		}
+		if (rc || (bytes_written == 0)) {
+			if (total_written)
+				break;
+			else {
+				free_xid(xid);
+				return rc;
+			}
+		} else {
+			spin_lock(&d_inode(dentry)->i_lock);
+			cifs_update_eof(cifsi, *offset, bytes_written);
+			spin_unlock(&d_inode(dentry)->i_lock);
+			*offset += bytes_written;
+		}
+	}
+
+	cifs_stats_bytes_written(tcon, total_written);
+
+	if (total_written > 0) {
+		spin_lock(&d_inode(dentry)->i_lock);
+		if (*offset > d_inode(dentry)->i_size) {
+			i_size_write(d_inode(dentry), *offset);
+			d_inode(dentry)->i_blocks = (512 - 1 + *offset) >> 9;
+		}
+		spin_unlock(&d_inode(dentry)->i_lock);
+	}
+	mark_inode_dirty_sync(d_inode(dentry));
+	free_xid(xid);
+	return total_written;
+}
+
+struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *cifs_inode,
+					bool fsuid_only)
+{
+	struct cifsFileInfo *open_file = NULL;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_inode->netfs.inode.i_sb);
+
+	/* only filter by fsuid on multiuser mounts */
+	if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER))
+		fsuid_only = false;
+
+	spin_lock(&cifs_inode->open_file_lock);
+	/* we could simply get the first_list_entry since write-only entries
+	   are always at the end of the list but since the first entry might
+	   have a close pending, we go through the whole list */
+	list_for_each_entry(open_file, &cifs_inode->openFileList, flist) {
+		if (fsuid_only && !uid_eq(open_file->uid, current_fsuid()))
+			continue;
+		if (OPEN_FMODE(open_file->f_flags) & FMODE_READ) {
+			if ((!open_file->invalidHandle)) {
+				/* found a good file */
+				/* lock it so it will not be closed on us */
+				cifsFileInfo_get(open_file);
+				spin_unlock(&cifs_inode->open_file_lock);
+				return open_file;
+			} /* else might as well continue, and look for
+			     another, or simply have the caller reopen it
+			     again rather than trying to fix this handle */
+		} else /* write only file */
+			break; /* write only files are last so must be done */
+	}
+	spin_unlock(&cifs_inode->open_file_lock);
+	return NULL;
+}
+
+/* Return -EBADF if no handle is found and general rc otherwise */
+int
+cifs_get_writable_file(struct cifsInodeInfo *cifs_inode, int flags,
+		       struct cifsFileInfo **ret_file)
+{
+	struct cifsFileInfo *open_file, *inv_file = NULL;
+	struct cifs_sb_info *cifs_sb;
+	bool any_available = false;
+	int rc = -EBADF;
+	unsigned int refind = 0;
+	bool fsuid_only = flags & FIND_WR_FSUID_ONLY;
+	bool with_delete = flags & FIND_WR_WITH_DELETE;
+	*ret_file = NULL;
+
+	/*
+	 * Having a null inode here (because mapping->host was set to zero by
+	 * the VFS or MM) should not happen but we had reports of on oops (due
+	 * to it being zero) during stress testcases so we need to check for it
+	 */
+
+	if (cifs_inode == NULL) {
+		cifs_dbg(VFS, "Null inode passed to cifs_writeable_file\n");
+		dump_stack();
+		return rc;
+	}
+
+	cifs_sb = CIFS_SB(cifs_inode->netfs.inode.i_sb);
+
+	/* only filter by fsuid on multiuser mounts */
+	if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER))
+		fsuid_only = false;
+
+	spin_lock(&cifs_inode->open_file_lock);
+refind_writable:
+	if (refind > MAX_REOPEN_ATT) {
+		spin_unlock(&cifs_inode->open_file_lock);
+		return rc;
+	}
+	list_for_each_entry(open_file, &cifs_inode->openFileList, flist) {
+		if (!any_available && open_file->pid != current->tgid)
+			continue;
+		if (fsuid_only && !uid_eq(open_file->uid, current_fsuid()))
+			continue;
+		if (with_delete && !(open_file->fid.access & DELETE))
+			continue;
+		if (OPEN_FMODE(open_file->f_flags) & FMODE_WRITE) {
+			if (!open_file->invalidHandle) {
+				/* found a good writable file */
+				cifsFileInfo_get(open_file);
+				spin_unlock(&cifs_inode->open_file_lock);
+				*ret_file = open_file;
+				return 0;
+			} else {
+				if (!inv_file)
+					inv_file = open_file;
+			}
+		}
+	}
+	/* couldn't find useable FH with same pid, try any available */
+	if (!any_available) {
+		any_available = true;
+		goto refind_writable;
+	}
+
+	if (inv_file) {
+		any_available = false;
+		cifsFileInfo_get(inv_file);
+	}
+
+	spin_unlock(&cifs_inode->open_file_lock);
+
+	if (inv_file) {
+		rc = cifs_reopen_file(inv_file, false);
+		if (!rc) {
+			*ret_file = inv_file;
+			return 0;
+		}
+
+		spin_lock(&cifs_inode->open_file_lock);
+		list_move_tail(&inv_file->flist, &cifs_inode->openFileList);
+		spin_unlock(&cifs_inode->open_file_lock);
+		cifsFileInfo_put(inv_file);
+		++refind;
+		inv_file = NULL;
+		spin_lock(&cifs_inode->open_file_lock);
+		goto refind_writable;
+	}
+
+	return rc;
+}
+
+struct cifsFileInfo *
+find_writable_file(struct cifsInodeInfo *cifs_inode, int flags)
+{
+	struct cifsFileInfo *cfile;
+	int rc;
+
+	rc = cifs_get_writable_file(cifs_inode, flags, &cfile);
+	if (rc)
+		cifs_dbg(FYI, "Couldn't find writable handle rc=%d\n", rc);
+
+	return cfile;
+}
+
+int
+cifs_get_writable_path(struct cifs_tcon *tcon, const char *name,
+		       int flags,
+		       struct cifsFileInfo **ret_file)
+{
+	struct cifsFileInfo *cfile;
+	void *page = alloc_dentry_path();
+
+	*ret_file = NULL;
+
+	spin_lock(&tcon->open_file_lock);
+	list_for_each_entry(cfile, &tcon->openFileList, tlist) {
+		struct cifsInodeInfo *cinode;
+		const char *full_path = build_path_from_dentry(cfile->dentry, page);
+		if (IS_ERR(full_path)) {
+			spin_unlock(&tcon->open_file_lock);
+			free_dentry_path(page);
+			return PTR_ERR(full_path);
+		}
+		if (strcmp(full_path, name))
+			continue;
+
+		cinode = CIFS_I(d_inode(cfile->dentry));
+		spin_unlock(&tcon->open_file_lock);
+		free_dentry_path(page);
+		return cifs_get_writable_file(cinode, flags, ret_file);
+	}
+
+	spin_unlock(&tcon->open_file_lock);
+	free_dentry_path(page);
+	return -ENOENT;
+}
+
+int
+cifs_get_readable_path(struct cifs_tcon *tcon, const char *name,
+		       struct cifsFileInfo **ret_file)
+{
+	struct cifsFileInfo *cfile;
+	void *page = alloc_dentry_path();
+
+	*ret_file = NULL;
+
+	spin_lock(&tcon->open_file_lock);
+	list_for_each_entry(cfile, &tcon->openFileList, tlist) {
+		struct cifsInodeInfo *cinode;
+		const char *full_path = build_path_from_dentry(cfile->dentry, page);
+		if (IS_ERR(full_path)) {
+			spin_unlock(&tcon->open_file_lock);
+			free_dentry_path(page);
+			return PTR_ERR(full_path);
+		}
+		if (strcmp(full_path, name))
+			continue;
+
+		cinode = CIFS_I(d_inode(cfile->dentry));
+		spin_unlock(&tcon->open_file_lock);
+		free_dentry_path(page);
+		*ret_file = find_readable_file(cinode, 0);
+		return *ret_file ? 0 : -ENOENT;
+	}
+
+	spin_unlock(&tcon->open_file_lock);
+	free_dentry_path(page);
+	return -ENOENT;
+}
+
+void
+cifs_writedata_release(struct kref *refcount)
+{
+	struct cifs_writedata *wdata = container_of(refcount,
+					struct cifs_writedata, refcount);
+#ifdef CONFIG_CIFS_SMB_DIRECT
+	if (wdata->mr) {
+		smbd_deregister_mr(wdata->mr);
+		wdata->mr = NULL;
+	}
+#endif
+
+	if (wdata->cfile)
+		cifsFileInfo_put(wdata->cfile);
+
+	kfree(wdata);
+}
+
+/*
+ * Write failed with a retryable error. Resend the write request. It's also
+ * possible that the page was redirtied so re-clean the page.
+ */
+static void
+cifs_writev_requeue(struct cifs_writedata *wdata)
+{
+	int rc = 0;
+	struct inode *inode = d_inode(wdata->cfile->dentry);
+	struct TCP_Server_Info *server;
+	unsigned int rest_len = wdata->bytes;
+	loff_t fpos = wdata->offset;
+
+	server = tlink_tcon(wdata->cfile->tlink)->ses->server;
+	do {
+		struct cifs_writedata *wdata2;
+		unsigned int wsize, cur_len;
+
+		wsize = server->ops->wp_retry_size(inode);
+		if (wsize < rest_len) {
+			if (wsize < PAGE_SIZE) {
+				rc = -EOPNOTSUPP;
+				break;
+			}
+			cur_len = min(round_down(wsize, PAGE_SIZE), rest_len);
+		} else {
+			cur_len = rest_len;
+		}
+
+		wdata2 = cifs_writedata_alloc(cifs_writev_complete);
+		if (!wdata2) {
+			rc = -ENOMEM;
+			break;
+		}
+
+		wdata2->sync_mode = wdata->sync_mode;
+		wdata2->offset	= fpos;
+		wdata2->bytes	= cur_len;
+		wdata2->iter	= wdata->iter;
+
+		iov_iter_advance(&wdata2->iter, fpos - wdata->offset);
+		iov_iter_truncate(&wdata2->iter, wdata2->bytes);
+
+		if (iov_iter_is_xarray(&wdata2->iter))
+			/* Check for pages having been redirtied and clean
+			 * them.  We can do this by walking the xarray.  If
+			 * it's not an xarray, then it's a DIO and we shouldn't
+			 * be mucking around with the page bits.
+			 */
+			cifs_undirty_folios(inode, fpos, cur_len);
+
+		rc = cifs_get_writable_file(CIFS_I(inode), FIND_WR_ANY,
+					    &wdata2->cfile);
+		if (!wdata2->cfile) {
+			cifs_dbg(VFS, "No writable handle to retry writepages rc=%d\n",
+				 rc);
+			if (!is_retryable_error(rc))
+				rc = -EBADF;
+		} else {
+			wdata2->pid = wdata2->cfile->pid;
+			rc = server->ops->async_writev(wdata2,
+						       cifs_writedata_release);
+		}
+
+		kref_put(&wdata2->refcount, cifs_writedata_release);
+		if (rc) {
+			if (is_retryable_error(rc))
+				continue;
+			fpos += cur_len;
+			rest_len -= cur_len;
+			break;
+		}
+
+		fpos += cur_len;
+		rest_len -= cur_len;
+	} while (rest_len > 0);
+
+	/* Clean up remaining pages from the original wdata */
+	if (iov_iter_is_xarray(&wdata->iter))
+		cifs_pages_write_failed(inode, fpos, rest_len);
+
+	if (rc != 0 && !is_retryable_error(rc))
+		mapping_set_error(inode->i_mapping, rc);
+	kref_put(&wdata->refcount, cifs_writedata_release);
+}
+
+void
+cifs_writev_complete(struct work_struct *work)
+{
+	struct cifs_writedata *wdata = container_of(work,
+						struct cifs_writedata, work);
+	struct inode *inode = d_inode(wdata->cfile->dentry);
+
+	if (wdata->result == 0) {
+		spin_lock(&inode->i_lock);
+		cifs_update_eof(CIFS_I(inode), wdata->offset, wdata->bytes);
+		spin_unlock(&inode->i_lock);
+		cifs_stats_bytes_written(tlink_tcon(wdata->cfile->tlink),
+					 wdata->bytes);
+	} else if (wdata->sync_mode == WB_SYNC_ALL && wdata->result == -EAGAIN)
+		return cifs_writev_requeue(wdata);
+
+	if (wdata->result == -EAGAIN)
+		cifs_pages_write_redirty(inode, wdata->offset, wdata->bytes);
+	else if (wdata->result < 0)
+		cifs_pages_write_failed(inode, wdata->offset, wdata->bytes);
+	else
+		cifs_pages_written_back(inode, wdata->offset, wdata->bytes);
+
+	if (wdata->result != -EAGAIN)
+		mapping_set_error(inode->i_mapping, wdata->result);
+	kref_put(&wdata->refcount, cifs_writedata_release);
+}
+
+struct cifs_writedata *cifs_writedata_alloc(work_func_t complete)
+{
+	struct cifs_writedata *wdata;
+
+	wdata = kzalloc(sizeof(*wdata), GFP_NOFS);
+	if (wdata != NULL) {
+		kref_init(&wdata->refcount);
+		INIT_LIST_HEAD(&wdata->list);
+		init_completion(&wdata->done);
+		INIT_WORK(&wdata->work, complete);
+	}
+	return wdata;
+}
+
+static int cifs_partialpagewrite(struct page *page, unsigned from, unsigned to)
+{
+	struct address_space *mapping = page->mapping;
+	loff_t offset = (loff_t)page->index << PAGE_SHIFT;
+	char *write_data;
+	int rc = -EFAULT;
+	int bytes_written = 0;
+	struct inode *inode;
+	struct cifsFileInfo *open_file;
+
+	if (!mapping || !mapping->host)
+		return -EFAULT;
+
+	inode = page->mapping->host;
+
+	offset += (loff_t)from;
+	write_data = kmap(page);
+	write_data += from;
+
+	if ((to > PAGE_SIZE) || (from > to)) {
+		kunmap(page);
+		return -EIO;
+	}
+
+	/* racing with truncate? */
+	if (offset > mapping->host->i_size) {
+		kunmap(page);
+		return 0; /* don't care */
+	}
+
+	/* check to make sure that we are not extending the file */
+	if (mapping->host->i_size - offset < (loff_t)to)
+		to = (unsigned)(mapping->host->i_size - offset);
+
+	rc = cifs_get_writable_file(CIFS_I(mapping->host), FIND_WR_ANY,
+				    &open_file);
+	if (!rc) {
+		bytes_written = cifs_write(open_file, open_file->pid,
+					   write_data, to - from, &offset);
+		cifsFileInfo_put(open_file);
+		/* Does mm or vfs already set times? */
+		simple_inode_init_ts(inode);
+		if ((bytes_written > 0) && (offset))
+			rc = 0;
+		else if (bytes_written < 0)
+			rc = bytes_written;
+		else
+			rc = -EFAULT;
+	} else {
+		cifs_dbg(FYI, "No writable handle for write page rc=%d\n", rc);
+		if (!is_retryable_error(rc))
+			rc = -EIO;
+	}
+
+	kunmap(page);
+	return rc;
+}
+
+/*
+ * Extend the region to be written back to include subsequent contiguously
+ * dirty pages if possible, but don't sleep while doing so.
+ */
+static void cifs_extend_writeback(struct address_space *mapping,
+				  long *_count,
+				  loff_t start,
+				  int max_pages,
+				  size_t max_len,
+				  unsigned int *_len)
+{
+	struct folio_batch batch;
+	struct folio *folio;
+	unsigned int psize, nr_pages;
+	size_t len = *_len;
+	pgoff_t index = (start + len) / PAGE_SIZE;
+	bool stop = true;
+	unsigned int i;
+	XA_STATE(xas, &mapping->i_pages, index);
+
+	folio_batch_init(&batch);
+
+	do {
+		/* Firstly, we gather up a batch of contiguous dirty pages
+		 * under the RCU read lock - but we can't clear the dirty flags
+		 * there if any of those pages are mapped.
+		 */
+		rcu_read_lock();
+
+		xas_for_each(&xas, folio, ULONG_MAX) {
+			stop = true;
+			if (xas_retry(&xas, folio))
+				continue;
+			if (xa_is_value(folio))
+				break;
+			if (folio_index(folio) != index)
+				break;
+			if (!folio_try_get_rcu(folio)) {
+				xas_reset(&xas);
+				continue;
+			}
+			nr_pages = folio_nr_pages(folio);
+			if (nr_pages > max_pages)
+				break;
+
+			/* Has the page moved or been split? */
+			if (unlikely(folio != xas_reload(&xas))) {
+				folio_put(folio);
+				break;
+			}
+
+			if (!folio_trylock(folio)) {
+				folio_put(folio);
+				break;
+			}
+			if (!folio_test_dirty(folio) || folio_test_writeback(folio)) {
+				folio_unlock(folio);
+				folio_put(folio);
+				break;
+			}
+
+			max_pages -= nr_pages;
+			psize = folio_size(folio);
+			len += psize;
+			stop = false;
+			if (max_pages <= 0 || len >= max_len || *_count <= 0)
+				stop = true;
+
+			index += nr_pages;
+			if (!folio_batch_add(&batch, folio))
+				break;
+			if (stop)
+				break;
+		}
+
+		if (!stop)
+			xas_pause(&xas);
+		rcu_read_unlock();
+
+		/* Now, if we obtained any pages, we can shift them to being
+		 * writable and mark them for caching.
+		 */
+		if (!folio_batch_count(&batch))
+			break;
+
+		for (i = 0; i < folio_batch_count(&batch); i++) {
+			folio = batch.folios[i];
+			/* The folio should be locked, dirty and not undergoing
+			 * writeback from the loop above.
+			 */
+			if (!folio_clear_dirty_for_io(folio))
+				WARN_ON(1);
+			if (folio_start_writeback(folio))
+				WARN_ON(1);
+
+			*_count -= folio_nr_pages(folio);
+			folio_unlock(folio);
+		}
+
+		folio_batch_release(&batch);
+		cond_resched();
+	} while (!stop);
+
+	*_len = len;
+}
+
+/*
+ * Write back the locked page and any subsequent non-locked dirty pages.
+ */
+static ssize_t cifs_write_back_from_locked_folio(struct address_space *mapping,
+						 struct writeback_control *wbc,
+						 struct folio *folio,
+						 loff_t start, loff_t end)
+{
+	struct inode *inode = mapping->host;
+	struct TCP_Server_Info *server;
+	struct cifs_writedata *wdata;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct cifs_credits credits_on_stack;
+	struct cifs_credits *credits = &credits_on_stack;
+	struct cifsFileInfo *cfile = NULL;
+	unsigned int xid, wsize, len;
+	loff_t i_size = i_size_read(inode);
+	size_t max_len;
+	long count = wbc->nr_to_write;
+	int rc;
+
+	/* The folio should be locked, dirty and not undergoing writeback. */
+	if (folio_start_writeback(folio))
+		WARN_ON(1);
+
+	count -= folio_nr_pages(folio);
+	len = folio_size(folio);
+
+	xid = get_xid();
+	server = cifs_pick_channel(cifs_sb_master_tcon(cifs_sb)->ses);
+
+	rc = cifs_get_writable_file(CIFS_I(inode), FIND_WR_ANY, &cfile);
+	if (rc) {
+		cifs_dbg(VFS, "No writable handle in writepages rc=%d\n", rc);
+		goto err_xid;
+	}
+
+	rc = server->ops->wait_mtu_credits(server, cifs_sb->ctx->wsize,
+					   &wsize, credits);
+	if (rc != 0)
+		goto err_close;
+
+	wdata = cifs_writedata_alloc(cifs_writev_complete);
+	if (!wdata) {
+		rc = -ENOMEM;
+		goto err_uncredit;
+	}
+
+	wdata->sync_mode = wbc->sync_mode;
+	wdata->offset = folio_pos(folio);
+	wdata->pid = cfile->pid;
+	wdata->credits = credits_on_stack;
+	wdata->cfile = cfile;
+	wdata->server = server;
+	cfile = NULL;
+
+	/* Find all consecutive lockable dirty pages, stopping when we find a
+	 * page that is not immediately lockable, is not dirty or is missing,
+	 * or we reach the end of the range.
+	 */
+	if (start < i_size) {
+		/* Trim the write to the EOF; the extra data is ignored.  Also
+		 * put an upper limit on the size of a single storedata op.
+		 */
+		max_len = wsize;
+		max_len = min_t(unsigned long long, max_len, end - start + 1);
+		max_len = min_t(unsigned long long, max_len, i_size - start);
+
+		if (len < max_len) {
+			int max_pages = INT_MAX;
+
+#ifdef CONFIG_CIFS_SMB_DIRECT
+			if (server->smbd_conn)
+				max_pages = server->smbd_conn->max_frmr_depth;
+#endif
+			max_pages -= folio_nr_pages(folio);
+
+			if (max_pages > 0)
+				cifs_extend_writeback(mapping, &count, start,
+						      max_pages, max_len, &len);
+		}
+		len = min_t(loff_t, len, max_len);
+	}
+
+	wdata->bytes = len;
+
+	/* We now have a contiguous set of dirty pages, each with writeback
+	 * set; the first page is still locked at this point, but all the rest
+	 * have been unlocked.
+	 */
+	folio_unlock(folio);
+
+	if (start < i_size) {
+		iov_iter_xarray(&wdata->iter, ITER_SOURCE, &mapping->i_pages,
+				start, len);
+
+		rc = adjust_credits(wdata->server, &wdata->credits, wdata->bytes);
+		if (rc)
+			goto err_wdata;
+
+		if (wdata->cfile->invalidHandle)
+			rc = -EAGAIN;
+		else
+			rc = wdata->server->ops->async_writev(wdata,
+							      cifs_writedata_release);
+		if (rc >= 0) {
+			kref_put(&wdata->refcount, cifs_writedata_release);
+			goto err_close;
+		}
+	} else {
+		/* The dirty region was entirely beyond the EOF. */
+		cifs_pages_written_back(inode, start, len);
+		rc = 0;
+	}
+
+err_wdata:
+	kref_put(&wdata->refcount, cifs_writedata_release);
+err_uncredit:
+	add_credits_and_wake_if(server, credits, 0);
+err_close:
+	if (cfile)
+		cifsFileInfo_put(cfile);
+err_xid:
+	free_xid(xid);
+	if (rc == 0) {
+		wbc->nr_to_write = count;
+		rc = len;
+	} else if (is_retryable_error(rc)) {
+		cifs_pages_write_redirty(inode, start, len);
+	} else {
+		cifs_pages_write_failed(inode, start, len);
+		mapping_set_error(mapping, rc);
+	}
+	/* Indication to update ctime and mtime as close is deferred */
+	set_bit(CIFS_INO_MODIFIED_ATTR, &CIFS_I(inode)->flags);
+	return rc;
+}
+
+/*
+ * write a region of pages back to the server
+ */
+static int cifs_writepages_region(struct address_space *mapping,
+				  struct writeback_control *wbc,
+				  loff_t start, loff_t end, loff_t *_next)
+{
+	struct folio_batch fbatch;
+	int skips = 0;
+
+	folio_batch_init(&fbatch);
+	do {
+		int nr;
+		pgoff_t index = start / PAGE_SIZE;
+
+		nr = filemap_get_folios_tag(mapping, &index, end / PAGE_SIZE,
+					    PAGECACHE_TAG_DIRTY, &fbatch);
+		if (!nr)
+			break;
+
+		for (int i = 0; i < nr; i++) {
+			ssize_t ret;
+			struct folio *folio = fbatch.folios[i];
+
+redo_folio:
+			start = folio_pos(folio); /* May regress with THPs */
+
+			/* At this point we hold neither the i_pages lock nor the
+			 * page lock: the page may be truncated or invalidated
+			 * (changing page->mapping to NULL), or even swizzled
+			 * back from swapper_space to tmpfs file mapping
+			 */
+			if (wbc->sync_mode != WB_SYNC_NONE) {
+				ret = folio_lock_killable(folio);
+				if (ret < 0)
+					goto write_error;
+			} else {
+				if (!folio_trylock(folio))
+					goto skip_write;
+			}
+
+			if (folio_mapping(folio) != mapping ||
+			    !folio_test_dirty(folio)) {
+				start += folio_size(folio);
+				folio_unlock(folio);
+				continue;
+			}
+
+			if (folio_test_writeback(folio) ||
+			    folio_test_fscache(folio)) {
+				folio_unlock(folio);
+				if (wbc->sync_mode == WB_SYNC_NONE)
+					goto skip_write;
+
+				folio_wait_writeback(folio);
+#ifdef CONFIG_CIFS_FSCACHE
+				folio_wait_fscache(folio);
+#endif
+				goto redo_folio;
+			}
+
+			if (!folio_clear_dirty_for_io(folio))
+				/* We hold the page lock - it should've been dirty. */
+				WARN_ON(1);
+
+			ret = cifs_write_back_from_locked_folio(mapping, wbc, folio, start, end);
+			if (ret < 0)
+				goto write_error;
+
+			start += ret;
+			continue;
+
+write_error:
+			folio_batch_release(&fbatch);
+			*_next = start;
+			return ret;
+
+skip_write:
+			/*
+			 * Too many skipped writes, or need to reschedule?
+			 * Treat it as a write error without an error code.
+			 */
+			if (skips >= 5 || need_resched()) {
+				ret = 0;
+				goto write_error;
+			}
+
+			/* Otherwise, just skip that folio and go on to the next */
+			skips++;
+			start += folio_size(folio);
+			continue;
+		}
+
+		folio_batch_release(&fbatch);		
+		cond_resched();
+	} while (wbc->nr_to_write > 0);
+
+	*_next = start;
+	return 0;
+}
+
+/*
+ * Write some of the pending data back to the server
+ */
+static int cifs_writepages(struct address_space *mapping,
+			   struct writeback_control *wbc)
+{
+	loff_t start, next;
+	int ret;
+
+	/* We have to be careful as we can end up racing with setattr()
+	 * truncating the pagecache since the caller doesn't take a lock here
+	 * to prevent it.
+	 */
+
+	if (wbc->range_cyclic) {
+		start = mapping->writeback_index * PAGE_SIZE;
+		ret = cifs_writepages_region(mapping, wbc, start, LLONG_MAX, &next);
+		if (ret == 0) {
+			mapping->writeback_index = next / PAGE_SIZE;
+			if (start > 0 && wbc->nr_to_write > 0) {
+				ret = cifs_writepages_region(mapping, wbc, 0,
+							     start, &next);
+				if (ret == 0)
+					mapping->writeback_index =
+						next / PAGE_SIZE;
+			}
+		}
+	} else if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) {
+		ret = cifs_writepages_region(mapping, wbc, 0, LLONG_MAX, &next);
+		if (wbc->nr_to_write > 0 && ret == 0)
+			mapping->writeback_index = next / PAGE_SIZE;
+	} else {
+		ret = cifs_writepages_region(mapping, wbc,
+					     wbc->range_start, wbc->range_end, &next);
+	}
+
+	return ret;
+}
+
+static int
+cifs_writepage_locked(struct page *page, struct writeback_control *wbc)
+{
+	int rc;
+	unsigned int xid;
+
+	xid = get_xid();
+/* BB add check for wbc flags */
+	get_page(page);
+	if (!PageUptodate(page))
+		cifs_dbg(FYI, "ppw - page not up to date\n");
+
+	/*
+	 * Set the "writeback" flag, and clear "dirty" in the radix tree.
+	 *
+	 * A writepage() implementation always needs to do either this,
+	 * or re-dirty the page with "redirty_page_for_writepage()" in
+	 * the case of a failure.
+	 *
+	 * Just unlocking the page will cause the radix tree tag-bits
+	 * to fail to update with the state of the page correctly.
+	 */
+	set_page_writeback(page);
+retry_write:
+	rc = cifs_partialpagewrite(page, 0, PAGE_SIZE);
+	if (is_retryable_error(rc)) {
+		if (wbc->sync_mode == WB_SYNC_ALL && rc == -EAGAIN)
+			goto retry_write;
+		redirty_page_for_writepage(wbc, page);
+	} else if (rc != 0) {
+		SetPageError(page);
+		mapping_set_error(page->mapping, rc);
+	} else {
+		SetPageUptodate(page);
+	}
+	end_page_writeback(page);
+	put_page(page);
+	free_xid(xid);
+	return rc;
+}
+
+static int cifs_write_end(struct file *file, struct address_space *mapping,
+			loff_t pos, unsigned len, unsigned copied,
+			struct page *page, void *fsdata)
+{
+	int rc;
+	struct inode *inode = mapping->host;
+	struct cifsFileInfo *cfile = file->private_data;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(cfile->dentry->d_sb);
+	struct folio *folio = page_folio(page);
+	__u32 pid;
+
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
+		pid = cfile->pid;
+	else
+		pid = current->tgid;
+
+	cifs_dbg(FYI, "write_end for page %p from pos %lld with %d bytes\n",
+		 page, pos, copied);
+
+	if (folio_test_checked(folio)) {
+		if (copied == len)
+			folio_mark_uptodate(folio);
+		folio_clear_checked(folio);
+	} else if (!folio_test_uptodate(folio) && copied == PAGE_SIZE)
+		folio_mark_uptodate(folio);
+
+	if (!folio_test_uptodate(folio)) {
+		char *page_data;
+		unsigned offset = pos & (PAGE_SIZE - 1);
+		unsigned int xid;
+
+		xid = get_xid();
+		/* this is probably better than directly calling
+		   partialpage_write since in this function the file handle is
+		   known which we might as well	leverage */
+		/* BB check if anything else missing out of ppw
+		   such as updating last write time */
+		page_data = kmap(page);
+		rc = cifs_write(cfile, pid, page_data + offset, copied, &pos);
+		/* if (rc < 0) should we set writebehind rc? */
+		kunmap(page);
+
+		free_xid(xid);
+	} else {
+		rc = copied;
+		pos += copied;
+		set_page_dirty(page);
+	}
+
+	if (rc > 0) {
+		spin_lock(&inode->i_lock);
+		if (pos > inode->i_size) {
+			i_size_write(inode, pos);
+			inode->i_blocks = (512 - 1 + pos) >> 9;
+		}
+		spin_unlock(&inode->i_lock);
+	}
+
+	unlock_page(page);
+	put_page(page);
+	/* Indication to update ctime and mtime as close is deferred */
+	set_bit(CIFS_INO_MODIFIED_ATTR, &CIFS_I(inode)->flags);
+
+	return rc;
+}
+
+int cifs_strict_fsync(struct file *file, loff_t start, loff_t end,
+		      int datasync)
+{
+	unsigned int xid;
+	int rc = 0;
+	struct cifs_tcon *tcon;
+	struct TCP_Server_Info *server;
+	struct cifsFileInfo *smbfile = file->private_data;
+	struct inode *inode = file_inode(file);
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+
+	rc = file_write_and_wait_range(file, start, end);
+	if (rc) {
+		trace_cifs_fsync_err(inode->i_ino, rc);
+		return rc;
+	}
+
+	xid = get_xid();
+
+	cifs_dbg(FYI, "Sync file - name: %pD datasync: 0x%x\n",
+		 file, datasync);
+
+	if (!CIFS_CACHE_READ(CIFS_I(inode))) {
+		rc = cifs_zap_mapping(inode);
+		if (rc) {
+			cifs_dbg(FYI, "rc: %d during invalidate phase\n", rc);
+			rc = 0; /* don't care about it in fsync */
+		}
+	}
+
+	tcon = tlink_tcon(smbfile->tlink);
+	if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) {
+		server = tcon->ses->server;
+		if (server->ops->flush == NULL) {
+			rc = -ENOSYS;
+			goto strict_fsync_exit;
+		}
+
+		if ((OPEN_FMODE(smbfile->f_flags) & FMODE_WRITE) == 0) {
+			smbfile = find_writable_file(CIFS_I(inode), FIND_WR_ANY);
+			if (smbfile) {
+				rc = server->ops->flush(xid, tcon, &smbfile->fid);
+				cifsFileInfo_put(smbfile);
+			} else
+				cifs_dbg(FYI, "ignore fsync for file not open for write\n");
+		} else
+			rc = server->ops->flush(xid, tcon, &smbfile->fid);
+	}
+
+strict_fsync_exit:
+	free_xid(xid);
+	return rc;
+}
+
+int cifs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
+{
+	unsigned int xid;
+	int rc = 0;
+	struct cifs_tcon *tcon;
+	struct TCP_Server_Info *server;
+	struct cifsFileInfo *smbfile = file->private_data;
+	struct inode *inode = file_inode(file);
+	struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);
+
+	rc = file_write_and_wait_range(file, start, end);
+	if (rc) {
+		trace_cifs_fsync_err(file_inode(file)->i_ino, rc);
+		return rc;
+	}
+
+	xid = get_xid();
+
+	cifs_dbg(FYI, "Sync file - name: %pD datasync: 0x%x\n",
+		 file, datasync);
+
+	tcon = tlink_tcon(smbfile->tlink);
+	if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) {
+		server = tcon->ses->server;
+		if (server->ops->flush == NULL) {
+			rc = -ENOSYS;
+			goto fsync_exit;
+		}
+
+		if ((OPEN_FMODE(smbfile->f_flags) & FMODE_WRITE) == 0) {
+			smbfile = find_writable_file(CIFS_I(inode), FIND_WR_ANY);
+			if (smbfile) {
+				rc = server->ops->flush(xid, tcon, &smbfile->fid);
+				cifsFileInfo_put(smbfile);
+			} else
+				cifs_dbg(FYI, "ignore fsync for file not open for write\n");
+		} else
+			rc = server->ops->flush(xid, tcon, &smbfile->fid);
+	}
+
+fsync_exit:
+	free_xid(xid);
+	return rc;
+}
+
+/*
+ * As file closes, flush all cached write data for this inode checking
+ * for write behind errors.
+ */
+int cifs_flush(struct file *file, fl_owner_t id)
+{
+	struct inode *inode = file_inode(file);
+	int rc = 0;
+
+	if (file->f_mode & FMODE_WRITE)
+		rc = filemap_write_and_wait(inode->i_mapping);
+
+	cifs_dbg(FYI, "Flush inode %p file %p rc %d\n", inode, file, rc);
+	if (rc) {
+		/* get more nuanced writeback errors */
+		rc = filemap_check_wb_err(file->f_mapping, 0);
+		trace_cifs_flush_err(inode->i_ino, rc);
+	}
+	return rc;
+}
+
+static void
+cifs_uncached_writedata_release(struct kref *refcount)
+{
+	struct cifs_writedata *wdata = container_of(refcount,
+					struct cifs_writedata, refcount);
+
+	kref_put(&wdata->ctx->refcount, cifs_aio_ctx_release);
+	cifs_writedata_release(refcount);
+}
+
+static void collect_uncached_write_data(struct cifs_aio_ctx *ctx);
+
+static void
+cifs_uncached_writev_complete(struct work_struct *work)
+{
+	struct cifs_writedata *wdata = container_of(work,
+					struct cifs_writedata, work);
+	struct inode *inode = d_inode(wdata->cfile->dentry);
+	struct cifsInodeInfo *cifsi = CIFS_I(inode);
+
+	spin_lock(&inode->i_lock);
+	cifs_update_eof(cifsi, wdata->offset, wdata->bytes);
+	if (cifsi->server_eof > inode->i_size)
+		i_size_write(inode, cifsi->server_eof);
+	spin_unlock(&inode->i_lock);
+
+	complete(&wdata->done);
+	collect_uncached_write_data(wdata->ctx);
+	/* the below call can possibly free the last ref to aio ctx */
+	kref_put(&wdata->refcount, cifs_uncached_writedata_release);
+}
+
+static int
+cifs_resend_wdata(struct cifs_writedata *wdata, struct list_head *wdata_list,
+	struct cifs_aio_ctx *ctx)
+{
+	unsigned int wsize;
+	struct cifs_credits credits;
+	int rc;
+	struct TCP_Server_Info *server = wdata->server;
+
+	do {
+		if (wdata->cfile->invalidHandle) {
+			rc = cifs_reopen_file(wdata->cfile, false);
+			if (rc == -EAGAIN)
+				continue;
+			else if (rc)
+				break;
+		}
+
+
+		/*
+		 * Wait for credits to resend this wdata.
+		 * Note: we are attempting to resend the whole wdata not in
+		 * segments
+		 */
+		do {
+			rc = server->ops->wait_mtu_credits(server, wdata->bytes,
+						&wsize, &credits);
+			if (rc)
+				goto fail;
+
+			if (wsize < wdata->bytes) {
+				add_credits_and_wake_if(server, &credits, 0);
+				msleep(1000);
+			}
+		} while (wsize < wdata->bytes);
+		wdata->credits = credits;
+
+		rc = adjust_credits(server, &wdata->credits, wdata->bytes);
+
+		if (!rc) {
+			if (wdata->cfile->invalidHandle)
+				rc = -EAGAIN;
+			else {
+#ifdef CONFIG_CIFS_SMB_DIRECT
+				if (wdata->mr) {
+					wdata->mr->need_invalidate = true;
+					smbd_deregister_mr(wdata->mr);
+					wdata->mr = NULL;
+				}
+#endif
+				rc = server->ops->async_writev(wdata,
+					cifs_uncached_writedata_release);
+			}
+		}
+
+		/* If the write was successfully sent, we are done */
+		if (!rc) {
+			list_add_tail(&wdata->list, wdata_list);
+			return 0;
+		}
+
+		/* Roll back credits and retry if needed */
+		add_credits_and_wake_if(server, &wdata->credits, 0);
+	} while (rc == -EAGAIN);
+
+fail:
+	kref_put(&wdata->refcount, cifs_uncached_writedata_release);
+	return rc;
+}
+
+/*
+ * Select span of a bvec iterator we're going to use.  Limit it by both maximum
+ * size and maximum number of segments.
+ */
+static size_t cifs_limit_bvec_subset(const struct iov_iter *iter, size_t max_size,
+				     size_t max_segs, unsigned int *_nsegs)
+{
+	const struct bio_vec *bvecs = iter->bvec;
+	unsigned int nbv = iter->nr_segs, ix = 0, nsegs = 0;
+	size_t len, span = 0, n = iter->count;
+	size_t skip = iter->iov_offset;
+
+	if (WARN_ON(!iov_iter_is_bvec(iter)) || n == 0)
+		return 0;
+
+	while (n && ix < nbv && skip) {
+		len = bvecs[ix].bv_len;
+		if (skip < len)
+			break;
+		skip -= len;
+		n -= len;
+		ix++;
+	}
+
+	while (n && ix < nbv) {
+		len = min3(n, bvecs[ix].bv_len - skip, max_size);
+		span += len;
+		max_size -= len;
+		nsegs++;
+		ix++;
+		if (max_size == 0 || nsegs >= max_segs)
+			break;
+		skip = 0;
+		n -= len;
+	}
+
+	*_nsegs = nsegs;
+	return span;
+}
+
+static int
+cifs_write_from_iter(loff_t fpos, size_t len, struct iov_iter *from,
+		     struct cifsFileInfo *open_file,
+		     struct cifs_sb_info *cifs_sb, struct list_head *wdata_list,
+		     struct cifs_aio_ctx *ctx)
+{
+	int rc = 0;
+	size_t cur_len, max_len;
+	struct cifs_writedata *wdata;
+	pid_t pid;
+	struct TCP_Server_Info *server;
+	unsigned int xid, max_segs = INT_MAX;
+
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
+		pid = open_file->pid;
+	else
+		pid = current->tgid;
+
+	server = cifs_pick_channel(tlink_tcon(open_file->tlink)->ses);
+	xid = get_xid();
+
+#ifdef CONFIG_CIFS_SMB_DIRECT
+	if (server->smbd_conn)
+		max_segs = server->smbd_conn->max_frmr_depth;
+#endif
+
+	do {
+		struct cifs_credits credits_on_stack;
+		struct cifs_credits *credits = &credits_on_stack;
+		unsigned int wsize, nsegs = 0;
+
+		if (signal_pending(current)) {
+			rc = -EINTR;
+			break;
+		}
+
+		if (open_file->invalidHandle) {
+			rc = cifs_reopen_file(open_file, false);
+			if (rc == -EAGAIN)
+				continue;
+			else if (rc)
+				break;
+		}
+
+		rc = server->ops->wait_mtu_credits(server, cifs_sb->ctx->wsize,
+						   &wsize, credits);
+		if (rc)
+			break;
+
+		max_len = min_t(const size_t, len, wsize);
+		if (!max_len) {
+			rc = -EAGAIN;
+			add_credits_and_wake_if(server, credits, 0);
+			break;
+		}
+
+		cur_len = cifs_limit_bvec_subset(from, max_len, max_segs, &nsegs);
+		cifs_dbg(FYI, "write_from_iter len=%zx/%zx nsegs=%u/%lu/%u\n",
+			 cur_len, max_len, nsegs, from->nr_segs, max_segs);
+		if (cur_len == 0) {
+			rc = -EIO;
+			add_credits_and_wake_if(server, credits, 0);
+			break;
+		}
+
+		wdata = cifs_writedata_alloc(cifs_uncached_writev_complete);
+		if (!wdata) {
+			rc = -ENOMEM;
+			add_credits_and_wake_if(server, credits, 0);
+			break;
+		}
+
+		wdata->sync_mode = WB_SYNC_ALL;
+		wdata->offset	= (__u64)fpos;
+		wdata->cfile	= cifsFileInfo_get(open_file);
+		wdata->server	= server;
+		wdata->pid	= pid;
+		wdata->bytes	= cur_len;
+		wdata->credits	= credits_on_stack;
+		wdata->iter	= *from;
+		wdata->ctx	= ctx;
+		kref_get(&ctx->refcount);
+
+		iov_iter_truncate(&wdata->iter, cur_len);
+
+		rc = adjust_credits(server, &wdata->credits, wdata->bytes);
+
+		if (!rc) {
+			if (wdata->cfile->invalidHandle)
+				rc = -EAGAIN;
+			else
+				rc = server->ops->async_writev(wdata,
+					cifs_uncached_writedata_release);
+		}
+
+		if (rc) {
+			add_credits_and_wake_if(server, &wdata->credits, 0);
+			kref_put(&wdata->refcount,
+				 cifs_uncached_writedata_release);
+			if (rc == -EAGAIN)
+				continue;
+			break;
+		}
+
+		list_add_tail(&wdata->list, wdata_list);
+		iov_iter_advance(from, cur_len);
+		fpos += cur_len;
+		len -= cur_len;
+	} while (len > 0);
+
+	free_xid(xid);
+	return rc;
+}
+
+static void collect_uncached_write_data(struct cifs_aio_ctx *ctx)
+{
+	struct cifs_writedata *wdata, *tmp;
+	struct cifs_tcon *tcon;
+	struct cifs_sb_info *cifs_sb;
+	struct dentry *dentry = ctx->cfile->dentry;
+	ssize_t rc;
+
+	tcon = tlink_tcon(ctx->cfile->tlink);
+	cifs_sb = CIFS_SB(dentry->d_sb);
+
+	mutex_lock(&ctx->aio_mutex);
+
+	if (list_empty(&ctx->list)) {
+		mutex_unlock(&ctx->aio_mutex);
+		return;
+	}
+
+	rc = ctx->rc;
+	/*
+	 * Wait for and collect replies for any successful sends in order of
+	 * increasing offset. Once an error is hit, then return without waiting
+	 * for any more replies.
+	 */
+restart_loop:
+	list_for_each_entry_safe(wdata, tmp, &ctx->list, list) {
+		if (!rc) {
+			if (!try_wait_for_completion(&wdata->done)) {
+				mutex_unlock(&ctx->aio_mutex);
+				return;
+			}
+
+			if (wdata->result)
+				rc = wdata->result;
+			else
+				ctx->total_len += wdata->bytes;
+
+			/* resend call if it's a retryable error */
+			if (rc == -EAGAIN) {
+				struct list_head tmp_list;
+				struct iov_iter tmp_from = ctx->iter;
+
+				INIT_LIST_HEAD(&tmp_list);
+				list_del_init(&wdata->list);
+
+				if (ctx->direct_io)
+					rc = cifs_resend_wdata(
+						wdata, &tmp_list, ctx);
+				else {
+					iov_iter_advance(&tmp_from,
+						 wdata->offset - ctx->pos);
+
+					rc = cifs_write_from_iter(wdata->offset,
+						wdata->bytes, &tmp_from,
+						ctx->cfile, cifs_sb, &tmp_list,
+						ctx);
+
+					kref_put(&wdata->refcount,
+						cifs_uncached_writedata_release);
+				}
+
+				list_splice(&tmp_list, &ctx->list);
+				goto restart_loop;
+			}
+		}
+		list_del_init(&wdata->list);
+		kref_put(&wdata->refcount, cifs_uncached_writedata_release);
+	}
+
+	cifs_stats_bytes_written(tcon, ctx->total_len);
+	set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(dentry->d_inode)->flags);
+
+	ctx->rc = (rc == 0) ? ctx->total_len : rc;
+
+	mutex_unlock(&ctx->aio_mutex);
+
+	if (ctx->iocb && ctx->iocb->ki_complete)
+		ctx->iocb->ki_complete(ctx->iocb, ctx->rc);
+	else
+		complete(&ctx->done);
+}
+
+static ssize_t __cifs_writev(
+	struct kiocb *iocb, struct iov_iter *from, bool direct)
+{
+	struct file *file = iocb->ki_filp;
+	ssize_t total_written = 0;
+	struct cifsFileInfo *cfile;
+	struct cifs_tcon *tcon;
+	struct cifs_sb_info *cifs_sb;
+	struct cifs_aio_ctx *ctx;
+	int rc;
+
+	rc = generic_write_checks(iocb, from);
+	if (rc <= 0)
+		return rc;
+
+	cifs_sb = CIFS_FILE_SB(file);
+	cfile = file->private_data;
+	tcon = tlink_tcon(cfile->tlink);
+
+	if (!tcon->ses->server->ops->async_writev)
+		return -ENOSYS;
+
+	ctx = cifs_aio_ctx_alloc();
+	if (!ctx)
+		return -ENOMEM;
+
+	ctx->cfile = cifsFileInfo_get(cfile);
+
+	if (!is_sync_kiocb(iocb))
+		ctx->iocb = iocb;
+
+	ctx->pos = iocb->ki_pos;
+	ctx->direct_io = direct;
+	ctx->nr_pinned_pages = 0;
+
+	if (user_backed_iter(from)) {
+		/*
+		 * Extract IOVEC/UBUF-type iterators to a BVEC-type iterator as
+		 * they contain references to the calling process's virtual
+		 * memory layout which won't be available in an async worker
+		 * thread.  This also takes a pin on every folio involved.
+		 */
+		rc = netfs_extract_user_iter(from, iov_iter_count(from),
+					     &ctx->iter, 0);
+		if (rc < 0) {
+			kref_put(&ctx->refcount, cifs_aio_ctx_release);
+			return rc;
+		}
+
+		ctx->nr_pinned_pages = rc;
+		ctx->bv = (void *)ctx->iter.bvec;
+		ctx->bv_need_unpin = iov_iter_extract_will_pin(from);
+	} else if ((iov_iter_is_bvec(from) || iov_iter_is_kvec(from)) &&
+		   !is_sync_kiocb(iocb)) {
+		/*
+		 * If the op is asynchronous, we need to copy the list attached
+		 * to a BVEC/KVEC-type iterator, but we assume that the storage
+		 * will be pinned by the caller; in any case, we may or may not
+		 * be able to pin the pages, so we don't try.
+		 */
+		ctx->bv = (void *)dup_iter(&ctx->iter, from, GFP_KERNEL);
+		if (!ctx->bv) {
+			kref_put(&ctx->refcount, cifs_aio_ctx_release);
+			return -ENOMEM;
+		}
+	} else {
+		/*
+		 * Otherwise, we just pass the iterator down as-is and rely on
+		 * the caller to make sure the pages referred to by the
+		 * iterator don't evaporate.
+		 */
+		ctx->iter = *from;
+	}
+
+	ctx->len = iov_iter_count(&ctx->iter);
+
+	/* grab a lock here due to read response handlers can access ctx */
+	mutex_lock(&ctx->aio_mutex);
+
+	rc = cifs_write_from_iter(iocb->ki_pos, ctx->len, &ctx->iter,
+				  cfile, cifs_sb, &ctx->list, ctx);
+
+	/*
+	 * If at least one write was successfully sent, then discard any rc
+	 * value from the later writes. If the other write succeeds, then
+	 * we'll end up returning whatever was written. If it fails, then
+	 * we'll get a new rc value from that.
+	 */
+	if (!list_empty(&ctx->list))
+		rc = 0;
+
+	mutex_unlock(&ctx->aio_mutex);
+
+	if (rc) {
+		kref_put(&ctx->refcount, cifs_aio_ctx_release);
+		return rc;
+	}
+
+	if (!is_sync_kiocb(iocb)) {
+		kref_put(&ctx->refcount, cifs_aio_ctx_release);
+		return -EIOCBQUEUED;
+	}
+
+	rc = wait_for_completion_killable(&ctx->done);
+	if (rc) {
+		mutex_lock(&ctx->aio_mutex);
+		ctx->rc = rc = -EINTR;
+		total_written = ctx->total_len;
+		mutex_unlock(&ctx->aio_mutex);
+	} else {
+		rc = ctx->rc;
+		total_written = ctx->total_len;
+	}
+
+	kref_put(&ctx->refcount, cifs_aio_ctx_release);
+
+	if (unlikely(!total_written))
+		return rc;
+
+	iocb->ki_pos += total_written;
+	return total_written;
+}
+
+ssize_t cifs_direct_writev(struct kiocb *iocb, struct iov_iter *from)
+{
+	struct file *file = iocb->ki_filp;
+
+	cifs_revalidate_mapping(file->f_inode);
+	return __cifs_writev(iocb, from, true);
+}
+
+ssize_t cifs_user_writev(struct kiocb *iocb, struct iov_iter *from)
+{
+	return __cifs_writev(iocb, from, false);
+}
+
+static ssize_t
+cifs_writev(struct kiocb *iocb, struct iov_iter *from)
+{
+	struct file *file = iocb->ki_filp;
+	struct cifsFileInfo *cfile = (struct cifsFileInfo *)file->private_data;
+	struct inode *inode = file->f_mapping->host;
+	struct cifsInodeInfo *cinode = CIFS_I(inode);
+	struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
+	ssize_t rc;
+
+	inode_lock(inode);
+	/*
+	 * We need to hold the sem to be sure nobody modifies lock list
+	 * with a brlock that prevents writing.
+	 */
+	down_read(&cinode->lock_sem);
+
+	rc = generic_write_checks(iocb, from);
+	if (rc <= 0)
+		goto out;
+
+	if (!cifs_find_lock_conflict(cfile, iocb->ki_pos, iov_iter_count(from),
+				     server->vals->exclusive_lock_type, 0,
+				     NULL, CIFS_WRITE_OP))
+		rc = __generic_file_write_iter(iocb, from);
+	else
+		rc = -EACCES;
+out:
+	up_read(&cinode->lock_sem);
+	inode_unlock(inode);
+
+	if (rc > 0)
+		rc = generic_write_sync(iocb, rc);
+	return rc;
+}
+
+ssize_t
+cifs_strict_writev(struct kiocb *iocb, struct iov_iter *from)
+{
+	struct inode *inode = file_inode(iocb->ki_filp);
+	struct cifsInodeInfo *cinode = CIFS_I(inode);
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct cifsFileInfo *cfile = (struct cifsFileInfo *)
+						iocb->ki_filp->private_data;
+	struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
+	ssize_t written;
+
+	written = cifs_get_writer(cinode);
+	if (written)
+		return written;
+
+	if (CIFS_CACHE_WRITE(cinode)) {
+		if (cap_unix(tcon->ses) &&
+		(CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability))
+		  && ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0)) {
+			written = generic_file_write_iter(iocb, from);
+			goto out;
+		}
+		written = cifs_writev(iocb, from);
+		goto out;
+	}
+	/*
+	 * For non-oplocked files in strict cache mode we need to write the data
+	 * to the server exactly from the pos to pos+len-1 rather than flush all
+	 * affected pages because it may cause a error with mandatory locks on
+	 * these pages but not on the region from pos to ppos+len-1.
+	 */
+	written = cifs_user_writev(iocb, from);
+	if (CIFS_CACHE_READ(cinode)) {
+		/*
+		 * We have read level caching and we have just sent a write
+		 * request to the server thus making data in the cache stale.
+		 * Zap the cache and set oplock/lease level to NONE to avoid
+		 * reading stale data from the cache. All subsequent read
+		 * operations will read new data from the server.
+		 */
+		cifs_zap_mapping(inode);
+		cifs_dbg(FYI, "Set Oplock/Lease to NONE for inode=%p after write\n",
+			 inode);
+		cinode->oplock = 0;
+	}
+out:
+	cifs_put_writer(cinode);
+	return written;
+}
+
+static struct cifs_readdata *cifs_readdata_alloc(work_func_t complete)
+{
+	struct cifs_readdata *rdata;
+
+	rdata = kzalloc(sizeof(*rdata), GFP_KERNEL);
+	if (rdata) {
+		kref_init(&rdata->refcount);
+		INIT_LIST_HEAD(&rdata->list);
+		init_completion(&rdata->done);
+		INIT_WORK(&rdata->work, complete);
+	}
+
+	return rdata;
+}
+
+void
+cifs_readdata_release(struct kref *refcount)
+{
+	struct cifs_readdata *rdata = container_of(refcount,
+					struct cifs_readdata, refcount);
+
+	if (rdata->ctx)
+		kref_put(&rdata->ctx->refcount, cifs_aio_ctx_release);
+#ifdef CONFIG_CIFS_SMB_DIRECT
+	if (rdata->mr) {
+		smbd_deregister_mr(rdata->mr);
+		rdata->mr = NULL;
+	}
+#endif
+	if (rdata->cfile)
+		cifsFileInfo_put(rdata->cfile);
+
+	kfree(rdata);
+}
+
+static void collect_uncached_read_data(struct cifs_aio_ctx *ctx);
+
+static void
+cifs_uncached_readv_complete(struct work_struct *work)
+{
+	struct cifs_readdata *rdata = container_of(work,
+						struct cifs_readdata, work);
+
+	complete(&rdata->done);
+	collect_uncached_read_data(rdata->ctx);
+	/* the below call can possibly free the last ref to aio ctx */
+	kref_put(&rdata->refcount, cifs_readdata_release);
+}
+
+static int cifs_resend_rdata(struct cifs_readdata *rdata,
+			struct list_head *rdata_list,
+			struct cifs_aio_ctx *ctx)
+{
+	unsigned int rsize;
+	struct cifs_credits credits;
+	int rc;
+	struct TCP_Server_Info *server;
+
+	/* XXX: should we pick a new channel here? */
+	server = rdata->server;
+
+	do {
+		if (rdata->cfile->invalidHandle) {
+			rc = cifs_reopen_file(rdata->cfile, true);
+			if (rc == -EAGAIN)
+				continue;
+			else if (rc)
+				break;
+		}
+
+		/*
+		 * Wait for credits to resend this rdata.
+		 * Note: we are attempting to resend the whole rdata not in
+		 * segments
+		 */
+		do {
+			rc = server->ops->wait_mtu_credits(server, rdata->bytes,
+						&rsize, &credits);
+
+			if (rc)
+				goto fail;
+
+			if (rsize < rdata->bytes) {
+				add_credits_and_wake_if(server, &credits, 0);
+				msleep(1000);
+			}
+		} while (rsize < rdata->bytes);
+		rdata->credits = credits;
+
+		rc = adjust_credits(server, &rdata->credits, rdata->bytes);
+		if (!rc) {
+			if (rdata->cfile->invalidHandle)
+				rc = -EAGAIN;
+			else {
+#ifdef CONFIG_CIFS_SMB_DIRECT
+				if (rdata->mr) {
+					rdata->mr->need_invalidate = true;
+					smbd_deregister_mr(rdata->mr);
+					rdata->mr = NULL;
+				}
+#endif
+				rc = server->ops->async_readv(rdata);
+			}
+		}
+
+		/* If the read was successfully sent, we are done */
+		if (!rc) {
+			/* Add to aio pending list */
+			list_add_tail(&rdata->list, rdata_list);
+			return 0;
+		}
+
+		/* Roll back credits and retry if needed */
+		add_credits_and_wake_if(server, &rdata->credits, 0);
+	} while (rc == -EAGAIN);
+
+fail:
+	kref_put(&rdata->refcount, cifs_readdata_release);
+	return rc;
+}
+
+static int
+cifs_send_async_read(loff_t fpos, size_t len, struct cifsFileInfo *open_file,
+		     struct cifs_sb_info *cifs_sb, struct list_head *rdata_list,
+		     struct cifs_aio_ctx *ctx)
+{
+	struct cifs_readdata *rdata;
+	unsigned int rsize, nsegs, max_segs = INT_MAX;
+	struct cifs_credits credits_on_stack;
+	struct cifs_credits *credits = &credits_on_stack;
+	size_t cur_len, max_len;
+	int rc;
+	pid_t pid;
+	struct TCP_Server_Info *server;
+
+	server = cifs_pick_channel(tlink_tcon(open_file->tlink)->ses);
+
+#ifdef CONFIG_CIFS_SMB_DIRECT
+	if (server->smbd_conn)
+		max_segs = server->smbd_conn->max_frmr_depth;
+#endif
+
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
+		pid = open_file->pid;
+	else
+		pid = current->tgid;
+
+	do {
+		if (open_file->invalidHandle) {
+			rc = cifs_reopen_file(open_file, true);
+			if (rc == -EAGAIN)
+				continue;
+			else if (rc)
+				break;
+		}
+
+		if (cifs_sb->ctx->rsize == 0)
+			cifs_sb->ctx->rsize =
+				server->ops->negotiate_rsize(tlink_tcon(open_file->tlink),
+							     cifs_sb->ctx);
+
+		rc = server->ops->wait_mtu_credits(server, cifs_sb->ctx->rsize,
+						   &rsize, credits);
+		if (rc)
+			break;
+
+		max_len = min_t(size_t, len, rsize);
+
+		cur_len = cifs_limit_bvec_subset(&ctx->iter, max_len,
+						 max_segs, &nsegs);
+		cifs_dbg(FYI, "read-to-iter len=%zx/%zx nsegs=%u/%lu/%u\n",
+			 cur_len, max_len, nsegs, ctx->iter.nr_segs, max_segs);
+		if (cur_len == 0) {
+			rc = -EIO;
+			add_credits_and_wake_if(server, credits, 0);
+			break;
+		}
+
+		rdata = cifs_readdata_alloc(cifs_uncached_readv_complete);
+		if (!rdata) {
+			add_credits_and_wake_if(server, credits, 0);
+			rc = -ENOMEM;
+			break;
+		}
+
+		rdata->server	= server;
+		rdata->cfile	= cifsFileInfo_get(open_file);
+		rdata->offset	= fpos;
+		rdata->bytes	= cur_len;
+		rdata->pid	= pid;
+		rdata->credits	= credits_on_stack;
+		rdata->ctx	= ctx;
+		kref_get(&ctx->refcount);
+
+		rdata->iter	= ctx->iter;
+		iov_iter_truncate(&rdata->iter, cur_len);
+
+		rc = adjust_credits(server, &rdata->credits, rdata->bytes);
+
+		if (!rc) {
+			if (rdata->cfile->invalidHandle)
+				rc = -EAGAIN;
+			else
+				rc = server->ops->async_readv(rdata);
+		}
+
+		if (rc) {
+			add_credits_and_wake_if(server, &rdata->credits, 0);
+			kref_put(&rdata->refcount, cifs_readdata_release);
+			if (rc == -EAGAIN)
+				continue;
+			break;
+		}
+
+		list_add_tail(&rdata->list, rdata_list);
+		iov_iter_advance(&ctx->iter, cur_len);
+		fpos += cur_len;
+		len -= cur_len;
+	} while (len > 0);
+
+	return rc;
+}
+
+static void
+collect_uncached_read_data(struct cifs_aio_ctx *ctx)
+{
+	struct cifs_readdata *rdata, *tmp;
+	struct cifs_sb_info *cifs_sb;
+	int rc;
+
+	cifs_sb = CIFS_SB(ctx->cfile->dentry->d_sb);
+
+	mutex_lock(&ctx->aio_mutex);
+
+	if (list_empty(&ctx->list)) {
+		mutex_unlock(&ctx->aio_mutex);
+		return;
+	}
+
+	rc = ctx->rc;
+	/* the loop below should proceed in the order of increasing offsets */
+again:
+	list_for_each_entry_safe(rdata, tmp, &ctx->list, list) {
+		if (!rc) {
+			if (!try_wait_for_completion(&rdata->done)) {
+				mutex_unlock(&ctx->aio_mutex);
+				return;
+			}
+
+			if (rdata->result == -EAGAIN) {
+				/* resend call if it's a retryable error */
+				struct list_head tmp_list;
+				unsigned int got_bytes = rdata->got_bytes;
+
+				list_del_init(&rdata->list);
+				INIT_LIST_HEAD(&tmp_list);
+
+				if (ctx->direct_io) {
+					/*
+					 * Re-use rdata as this is a
+					 * direct I/O
+					 */
+					rc = cifs_resend_rdata(
+						rdata,
+						&tmp_list, ctx);
+				} else {
+					rc = cifs_send_async_read(
+						rdata->offset + got_bytes,
+						rdata->bytes - got_bytes,
+						rdata->cfile, cifs_sb,
+						&tmp_list, ctx);
+
+					kref_put(&rdata->refcount,
+						cifs_readdata_release);
+				}
+
+				list_splice(&tmp_list, &ctx->list);
+
+				goto again;
+			} else if (rdata->result)
+				rc = rdata->result;
+
+			/* if there was a short read -- discard anything left */
+			if (rdata->got_bytes && rdata->got_bytes < rdata->bytes)
+				rc = -ENODATA;
+
+			ctx->total_len += rdata->got_bytes;
+		}
+		list_del_init(&rdata->list);
+		kref_put(&rdata->refcount, cifs_readdata_release);
+	}
+
+	/* mask nodata case */
+	if (rc == -ENODATA)
+		rc = 0;
+
+	ctx->rc = (rc == 0) ? (ssize_t)ctx->total_len : rc;
+
+	mutex_unlock(&ctx->aio_mutex);
+
+	if (ctx->iocb && ctx->iocb->ki_complete)
+		ctx->iocb->ki_complete(ctx->iocb, ctx->rc);
+	else
+		complete(&ctx->done);
+}
+
+static ssize_t __cifs_readv(
+	struct kiocb *iocb, struct iov_iter *to, bool direct)
+{
+	size_t len;
+	struct file *file = iocb->ki_filp;
+	struct cifs_sb_info *cifs_sb;
+	struct cifsFileInfo *cfile;
+	struct cifs_tcon *tcon;
+	ssize_t rc, total_read = 0;
+	loff_t offset = iocb->ki_pos;
+	struct cifs_aio_ctx *ctx;
+
+	len = iov_iter_count(to);
+	if (!len)
+		return 0;
+
+	cifs_sb = CIFS_FILE_SB(file);
+	cfile = file->private_data;
+	tcon = tlink_tcon(cfile->tlink);
+
+	if (!tcon->ses->server->ops->async_readv)
+		return -ENOSYS;
+
+	if ((file->f_flags & O_ACCMODE) == O_WRONLY)
+		cifs_dbg(FYI, "attempting read on write only file instance\n");
+
+	ctx = cifs_aio_ctx_alloc();
+	if (!ctx)
+		return -ENOMEM;
+
+	ctx->pos	= offset;
+	ctx->direct_io	= direct;
+	ctx->len	= len;
+	ctx->cfile	= cifsFileInfo_get(cfile);
+	ctx->nr_pinned_pages = 0;
+
+	if (!is_sync_kiocb(iocb))
+		ctx->iocb = iocb;
+
+	if (user_backed_iter(to)) {
+		/*
+		 * Extract IOVEC/UBUF-type iterators to a BVEC-type iterator as
+		 * they contain references to the calling process's virtual
+		 * memory layout which won't be available in an async worker
+		 * thread.  This also takes a pin on every folio involved.
+		 */
+		rc = netfs_extract_user_iter(to, iov_iter_count(to),
+					     &ctx->iter, 0);
+		if (rc < 0) {
+			kref_put(&ctx->refcount, cifs_aio_ctx_release);
+			return rc;
+		}
+
+		ctx->nr_pinned_pages = rc;
+		ctx->bv = (void *)ctx->iter.bvec;
+		ctx->bv_need_unpin = iov_iter_extract_will_pin(to);
+		ctx->should_dirty = true;
+	} else if ((iov_iter_is_bvec(to) || iov_iter_is_kvec(to)) &&
+		   !is_sync_kiocb(iocb)) {
+		/*
+		 * If the op is asynchronous, we need to copy the list attached
+		 * to a BVEC/KVEC-type iterator, but we assume that the storage
+		 * will be retained by the caller; in any case, we may or may
+		 * not be able to pin the pages, so we don't try.
+		 */
+		ctx->bv = (void *)dup_iter(&ctx->iter, to, GFP_KERNEL);
+		if (!ctx->bv) {
+			kref_put(&ctx->refcount, cifs_aio_ctx_release);
+			return -ENOMEM;
+		}
+	} else {
+		/*
+		 * Otherwise, we just pass the iterator down as-is and rely on
+		 * the caller to make sure the pages referred to by the
+		 * iterator don't evaporate.
+		 */
+		ctx->iter = *to;
+	}
+
+	if (direct) {
+		rc = filemap_write_and_wait_range(file->f_inode->i_mapping,
+						  offset, offset + len - 1);
+		if (rc) {
+			kref_put(&ctx->refcount, cifs_aio_ctx_release);
+			return -EAGAIN;
+		}
+	}
+
+	/* grab a lock here due to read response handlers can access ctx */
+	mutex_lock(&ctx->aio_mutex);
+
+	rc = cifs_send_async_read(offset, len, cfile, cifs_sb, &ctx->list, ctx);
+
+	/* if at least one read request send succeeded, then reset rc */
+	if (!list_empty(&ctx->list))
+		rc = 0;
+
+	mutex_unlock(&ctx->aio_mutex);
+
+	if (rc) {
+		kref_put(&ctx->refcount, cifs_aio_ctx_release);
+		return rc;
+	}
+
+	if (!is_sync_kiocb(iocb)) {
+		kref_put(&ctx->refcount, cifs_aio_ctx_release);
+		return -EIOCBQUEUED;
+	}
+
+	rc = wait_for_completion_killable(&ctx->done);
+	if (rc) {
+		mutex_lock(&ctx->aio_mutex);
+		ctx->rc = rc = -EINTR;
+		total_read = ctx->total_len;
+		mutex_unlock(&ctx->aio_mutex);
+	} else {
+		rc = ctx->rc;
+		total_read = ctx->total_len;
+	}
+
+	kref_put(&ctx->refcount, cifs_aio_ctx_release);
+
+	if (total_read) {
+		iocb->ki_pos += total_read;
+		return total_read;
+	}
+	return rc;
+}
+
+ssize_t cifs_direct_readv(struct kiocb *iocb, struct iov_iter *to)
+{
+	return __cifs_readv(iocb, to, true);
+}
+
+ssize_t cifs_user_readv(struct kiocb *iocb, struct iov_iter *to)
+{
+	return __cifs_readv(iocb, to, false);
+}
+
+ssize_t
+cifs_strict_readv(struct kiocb *iocb, struct iov_iter *to)
+{
+	struct inode *inode = file_inode(iocb->ki_filp);
+	struct cifsInodeInfo *cinode = CIFS_I(inode);
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct cifsFileInfo *cfile = (struct cifsFileInfo *)
+						iocb->ki_filp->private_data;
+	struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
+	int rc = -EACCES;
+
+	/*
+	 * In strict cache mode we need to read from the server all the time
+	 * if we don't have level II oplock because the server can delay mtime
+	 * change - so we can't make a decision about inode invalidating.
+	 * And we can also fail with pagereading if there are mandatory locks
+	 * on pages affected by this read but not on the region from pos to
+	 * pos+len-1.
+	 */
+	if (!CIFS_CACHE_READ(cinode))
+		return cifs_user_readv(iocb, to);
+
+	if (cap_unix(tcon->ses) &&
+	    (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) &&
+	    ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0))
+		return generic_file_read_iter(iocb, to);
+
+	/*
+	 * We need to hold the sem to be sure nobody modifies lock list
+	 * with a brlock that prevents reading.
+	 */
+	down_read(&cinode->lock_sem);
+	if (!cifs_find_lock_conflict(cfile, iocb->ki_pos, iov_iter_count(to),
+				     tcon->ses->server->vals->shared_lock_type,
+				     0, NULL, CIFS_READ_OP))
+		rc = generic_file_read_iter(iocb, to);
+	up_read(&cinode->lock_sem);
+	return rc;
+}
+
+static ssize_t
+cifs_read(struct file *file, char *read_data, size_t read_size, loff_t *offset)
+{
+	int rc = -EACCES;
+	unsigned int bytes_read = 0;
+	unsigned int total_read;
+	unsigned int current_read_size;
+	unsigned int rsize;
+	struct cifs_sb_info *cifs_sb;
+	struct cifs_tcon *tcon;
+	struct TCP_Server_Info *server;
+	unsigned int xid;
+	char *cur_offset;
+	struct cifsFileInfo *open_file;
+	struct cifs_io_parms io_parms = {0};
+	int buf_type = CIFS_NO_BUFFER;
+	__u32 pid;
+
+	xid = get_xid();
+	cifs_sb = CIFS_FILE_SB(file);
+
+	/* FIXME: set up handlers for larger reads and/or convert to async */
+	rsize = min_t(unsigned int, cifs_sb->ctx->rsize, CIFSMaxBufSize);
+
+	if (file->private_data == NULL) {
+		rc = -EBADF;
+		free_xid(xid);
+		return rc;
+	}
+	open_file = file->private_data;
+	tcon = tlink_tcon(open_file->tlink);
+	server = cifs_pick_channel(tcon->ses);
+
+	if (!server->ops->sync_read) {
+		free_xid(xid);
+		return -ENOSYS;
+	}
+
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
+		pid = open_file->pid;
+	else
+		pid = current->tgid;
+
+	if ((file->f_flags & O_ACCMODE) == O_WRONLY)
+		cifs_dbg(FYI, "attempting read on write only file instance\n");
+
+	for (total_read = 0, cur_offset = read_data; read_size > total_read;
+	     total_read += bytes_read, cur_offset += bytes_read) {
+		do {
+			current_read_size = min_t(uint, read_size - total_read,
+						  rsize);
+			/*
+			 * For windows me and 9x we do not want to request more
+			 * than it negotiated since it will refuse the read
+			 * then.
+			 */
+			if (!(tcon->ses->capabilities &
+				tcon->ses->server->vals->cap_large_files)) {
+				current_read_size = min_t(uint,
+					current_read_size, CIFSMaxBufSize);
+			}
+			if (open_file->invalidHandle) {
+				rc = cifs_reopen_file(open_file, true);
+				if (rc != 0)
+					break;
+			}
+			io_parms.pid = pid;
+			io_parms.tcon = tcon;
+			io_parms.offset = *offset;
+			io_parms.length = current_read_size;
+			io_parms.server = server;
+			rc = server->ops->sync_read(xid, &open_file->fid, &io_parms,
+						    &bytes_read, &cur_offset,
+						    &buf_type);
+		} while (rc == -EAGAIN);
+
+		if (rc || (bytes_read == 0)) {
+			if (total_read) {
+				break;
+			} else {
+				free_xid(xid);
+				return rc;
+			}
+		} else {
+			cifs_stats_bytes_read(tcon, total_read);
+			*offset += bytes_read;
+		}
+	}
+	free_xid(xid);
+	return total_read;
+}
+
+/*
+ * If the page is mmap'ed into a process' page tables, then we need to make
+ * sure that it doesn't change while being written back.
+ */
+static vm_fault_t cifs_page_mkwrite(struct vm_fault *vmf)
+{
+	struct folio *folio = page_folio(vmf->page);
+
+	/* Wait for the folio to be written to the cache before we allow it to
+	 * be modified.  We then assume the entire folio will need writing back.
+	 */
+#ifdef CONFIG_CIFS_FSCACHE
+	if (folio_test_fscache(folio) &&
+	    folio_wait_fscache_killable(folio) < 0)
+		return VM_FAULT_RETRY;
+#endif
+
+	folio_wait_writeback(folio);
+
+	if (folio_lock_killable(folio) < 0)
+		return VM_FAULT_RETRY;
+	return VM_FAULT_LOCKED;
+}
+
+static const struct vm_operations_struct cifs_file_vm_ops = {
+	.fault = filemap_fault,
+	.map_pages = filemap_map_pages,
+	.page_mkwrite = cifs_page_mkwrite,
+};
+
+int cifs_file_strict_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	int xid, rc = 0;
+	struct inode *inode = file_inode(file);
+
+	xid = get_xid();
+
+	if (!CIFS_CACHE_READ(CIFS_I(inode)))
+		rc = cifs_zap_mapping(inode);
+	if (!rc)
+		rc = generic_file_mmap(file, vma);
+	if (!rc)
+		vma->vm_ops = &cifs_file_vm_ops;
+
+	free_xid(xid);
+	return rc;
+}
+
+int cifs_file_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	int rc, xid;
+
+	xid = get_xid();
+
+	rc = cifs_revalidate_file(file);
+	if (rc)
+		cifs_dbg(FYI, "Validation prior to mmap failed, error=%d\n",
+			 rc);
+	if (!rc)
+		rc = generic_file_mmap(file, vma);
+	if (!rc)
+		vma->vm_ops = &cifs_file_vm_ops;
+
+	free_xid(xid);
+	return rc;
+}
+
+/*
+ * Unlock a bunch of folios in the pagecache.
+ */
+static void cifs_unlock_folios(struct address_space *mapping, pgoff_t first, pgoff_t last)
+{
+	struct folio *folio;
+	XA_STATE(xas, &mapping->i_pages, first);
+
+	rcu_read_lock();
+	xas_for_each(&xas, folio, last) {
+		folio_unlock(folio);
+	}
+	rcu_read_unlock();
+}
+
+static void cifs_readahead_complete(struct work_struct *work)
+{
+	struct cifs_readdata *rdata = container_of(work,
+						   struct cifs_readdata, work);
+	struct folio *folio;
+	pgoff_t last;
+	bool good = rdata->result == 0 || (rdata->result == -EAGAIN && rdata->got_bytes);
+
+	XA_STATE(xas, &rdata->mapping->i_pages, rdata->offset / PAGE_SIZE);
+
+	if (good)
+		cifs_readahead_to_fscache(rdata->mapping->host,
+					  rdata->offset, rdata->bytes);
+
+	if (iov_iter_count(&rdata->iter) > 0)
+		iov_iter_zero(iov_iter_count(&rdata->iter), &rdata->iter);
+
+	last = (rdata->offset + rdata->bytes - 1) / PAGE_SIZE;
+
+	rcu_read_lock();
+	xas_for_each(&xas, folio, last) {
+		if (good) {
+			flush_dcache_folio(folio);
+			folio_mark_uptodate(folio);
+		}
+		folio_unlock(folio);
+	}
+	rcu_read_unlock();
+
+	kref_put(&rdata->refcount, cifs_readdata_release);
+}
+
+static void cifs_readahead(struct readahead_control *ractl)
+{
+	struct cifsFileInfo *open_file = ractl->file->private_data;
+	struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(ractl->file);
+	struct TCP_Server_Info *server;
+	unsigned int xid, nr_pages, cache_nr_pages = 0;
+	unsigned int ra_pages;
+	pgoff_t next_cached = ULONG_MAX, ra_index;
+	bool caching = fscache_cookie_enabled(cifs_inode_cookie(ractl->mapping->host)) &&
+		cifs_inode_cookie(ractl->mapping->host)->cache_priv;
+	bool check_cache = caching;
+	pid_t pid;
+	int rc = 0;
+
+	/* Note that readahead_count() lags behind our dequeuing of pages from
+	 * the ractl, wo we have to keep track for ourselves.
+	 */
+	ra_pages = readahead_count(ractl);
+	ra_index = readahead_index(ractl);
+
+	xid = get_xid();
+
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
+		pid = open_file->pid;
+	else
+		pid = current->tgid;
+
+	server = cifs_pick_channel(tlink_tcon(open_file->tlink)->ses);
+
+	cifs_dbg(FYI, "%s: file=%p mapping=%p num_pages=%u\n",
+		 __func__, ractl->file, ractl->mapping, ra_pages);
+
+	/*
+	 * Chop the readahead request up into rsize-sized read requests.
+	 */
+	while ((nr_pages = ra_pages)) {
+		unsigned int i, rsize;
+		struct cifs_readdata *rdata;
+		struct cifs_credits credits_on_stack;
+		struct cifs_credits *credits = &credits_on_stack;
+		struct folio *folio;
+		pgoff_t fsize;
+
+		/*
+		 * Find out if we have anything cached in the range of
+		 * interest, and if so, where the next chunk of cached data is.
+		 */
+		if (caching) {
+			if (check_cache) {
+				rc = cifs_fscache_query_occupancy(
+					ractl->mapping->host, ra_index, nr_pages,
+					&next_cached, &cache_nr_pages);
+				if (rc < 0)
+					caching = false;
+				check_cache = false;
+			}
+
+			if (ra_index == next_cached) {
+				/*
+				 * TODO: Send a whole batch of pages to be read
+				 * by the cache.
+				 */
+				folio = readahead_folio(ractl);
+				fsize = folio_nr_pages(folio);
+				ra_pages -= fsize;
+				ra_index += fsize;
+				if (cifs_readpage_from_fscache(ractl->mapping->host,
+							       &folio->page) < 0) {
+					/*
+					 * TODO: Deal with cache read failure
+					 * here, but for the moment, delegate
+					 * that to readpage.
+					 */
+					caching = false;
+				}
+				folio_unlock(folio);
+				next_cached += fsize;
+				cache_nr_pages -= fsize;
+				if (cache_nr_pages == 0)
+					check_cache = true;
+				continue;
+			}
+		}
+
+		if (open_file->invalidHandle) {
+			rc = cifs_reopen_file(open_file, true);
+			if (rc) {
+				if (rc == -EAGAIN)
+					continue;
+				break;
+			}
+		}
+
+		if (cifs_sb->ctx->rsize == 0)
+			cifs_sb->ctx->rsize =
+				server->ops->negotiate_rsize(tlink_tcon(open_file->tlink),
+							     cifs_sb->ctx);
+
+		rc = server->ops->wait_mtu_credits(server, cifs_sb->ctx->rsize,
+						   &rsize, credits);
+		if (rc)
+			break;
+		nr_pages = min_t(size_t, rsize / PAGE_SIZE, ra_pages);
+		if (next_cached != ULONG_MAX)
+			nr_pages = min_t(size_t, nr_pages, next_cached - ra_index);
+
+		/*
+		 * Give up immediately if rsize is too small to read an entire
+		 * page. The VFS will fall back to readpage. We should never
+		 * reach this point however since we set ra_pages to 0 when the
+		 * rsize is smaller than a cache page.
+		 */
+		if (unlikely(!nr_pages)) {
+			add_credits_and_wake_if(server, credits, 0);
+			break;
+		}
+
+		rdata = cifs_readdata_alloc(cifs_readahead_complete);
+		if (!rdata) {
+			/* best to give up if we're out of mem */
+			add_credits_and_wake_if(server, credits, 0);
+			break;
+		}
+
+		rdata->offset	= ra_index * PAGE_SIZE;
+		rdata->bytes	= nr_pages * PAGE_SIZE;
+		rdata->cfile	= cifsFileInfo_get(open_file);
+		rdata->server	= server;
+		rdata->mapping	= ractl->mapping;
+		rdata->pid	= pid;
+		rdata->credits	= credits_on_stack;
+
+		for (i = 0; i < nr_pages; i++) {
+			if (!readahead_folio(ractl))
+				WARN_ON(1);
+		}
+		ra_pages -= nr_pages;
+		ra_index += nr_pages;
+
+		iov_iter_xarray(&rdata->iter, ITER_DEST, &rdata->mapping->i_pages,
+				rdata->offset, rdata->bytes);
+
+		rc = adjust_credits(server, &rdata->credits, rdata->bytes);
+		if (!rc) {
+			if (rdata->cfile->invalidHandle)
+				rc = -EAGAIN;
+			else
+				rc = server->ops->async_readv(rdata);
+		}
+
+		if (rc) {
+			add_credits_and_wake_if(server, &rdata->credits, 0);
+			cifs_unlock_folios(rdata->mapping,
+					   rdata->offset / PAGE_SIZE,
+					   (rdata->offset + rdata->bytes - 1) / PAGE_SIZE);
+			/* Fallback to the readpage in error/reconnect cases */
+			kref_put(&rdata->refcount, cifs_readdata_release);
+			break;
+		}
+
+		kref_put(&rdata->refcount, cifs_readdata_release);
+	}
+
+	free_xid(xid);
+}
+
+/*
+ * cifs_readpage_worker must be called with the page pinned
+ */
+static int cifs_readpage_worker(struct file *file, struct page *page,
+	loff_t *poffset)
+{
+	struct inode *inode = file_inode(file);
+	struct timespec64 atime, mtime;
+	char *read_data;
+	int rc;
+
+	/* Is the page cached? */
+	rc = cifs_readpage_from_fscache(inode, page);
+	if (rc == 0)
+		goto read_complete;
+
+	read_data = kmap(page);
+	/* for reads over a certain size could initiate async read ahead */
+
+	rc = cifs_read(file, read_data, PAGE_SIZE, poffset);
+
+	if (rc < 0)
+		goto io_error;
+	else
+		cifs_dbg(FYI, "Bytes read %d\n", rc);
+
+	/* we do not want atime to be less than mtime, it broke some apps */
+	atime = inode_set_atime_to_ts(inode, current_time(inode));
+	mtime = inode_get_mtime(inode);
+	if (timespec64_compare(&atime, &mtime) < 0)
+		inode_set_atime_to_ts(inode, inode_get_mtime(inode));
+
+	if (PAGE_SIZE > rc)
+		memset(read_data + rc, 0, PAGE_SIZE - rc);
+
+	flush_dcache_page(page);
+	SetPageUptodate(page);
+	rc = 0;
+
+io_error:
+	kunmap(page);
+
+read_complete:
+	unlock_page(page);
+	return rc;
+}
+
+static int cifs_read_folio(struct file *file, struct folio *folio)
+{
+	struct page *page = &folio->page;
+	loff_t offset = page_file_offset(page);
+	int rc = -EACCES;
+	unsigned int xid;
+
+	xid = get_xid();
+
+	if (file->private_data == NULL) {
+		rc = -EBADF;
+		free_xid(xid);
+		return rc;
+	}
+
+	cifs_dbg(FYI, "read_folio %p at offset %d 0x%x\n",
+		 page, (int)offset, (int)offset);
+
+	rc = cifs_readpage_worker(file, page, &offset);
+
+	free_xid(xid);
+	return rc;
+}
+
+static int is_inode_writable(struct cifsInodeInfo *cifs_inode)
+{
+	struct cifsFileInfo *open_file;
+
+	spin_lock(&cifs_inode->open_file_lock);
+	list_for_each_entry(open_file, &cifs_inode->openFileList, flist) {
+		if (OPEN_FMODE(open_file->f_flags) & FMODE_WRITE) {
+			spin_unlock(&cifs_inode->open_file_lock);
+			return 1;
+		}
+	}
+	spin_unlock(&cifs_inode->open_file_lock);
+	return 0;
+}
+
+/* We do not want to update the file size from server for inodes
+   open for write - to avoid races with writepage extending
+   the file - in the future we could consider allowing
+   refreshing the inode only on increases in the file size
+   but this is tricky to do without racing with writebehind
+   page caching in the current Linux kernel design */
+bool is_size_safe_to_change(struct cifsInodeInfo *cifsInode, __u64 end_of_file)
+{
+	if (!cifsInode)
+		return true;
+
+	if (is_inode_writable(cifsInode)) {
+		/* This inode is open for write at least once */
+		struct cifs_sb_info *cifs_sb;
+
+		cifs_sb = CIFS_SB(cifsInode->netfs.inode.i_sb);
+		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
+			/* since no page cache to corrupt on directio
+			we can change size safely */
+			return true;
+		}
+
+		if (i_size_read(&cifsInode->netfs.inode) < end_of_file)
+			return true;
+
+		return false;
+	} else
+		return true;
+}
+
+static int cifs_write_begin(struct file *file, struct address_space *mapping,
+			loff_t pos, unsigned len,
+			struct page **pagep, void **fsdata)
+{
+	int oncethru = 0;
+	pgoff_t index = pos >> PAGE_SHIFT;
+	loff_t offset = pos & (PAGE_SIZE - 1);
+	loff_t page_start = pos & PAGE_MASK;
+	loff_t i_size;
+	struct page *page;
+	int rc = 0;
+
+	cifs_dbg(FYI, "write_begin from %lld len %d\n", (long long)pos, len);
+
+start:
+	page = grab_cache_page_write_begin(mapping, index);
+	if (!page) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	if (PageUptodate(page))
+		goto out;
+
+	/*
+	 * If we write a full page it will be up to date, no need to read from
+	 * the server. If the write is short, we'll end up doing a sync write
+	 * instead.
+	 */
+	if (len == PAGE_SIZE)
+		goto out;
+
+	/*
+	 * optimize away the read when we have an oplock, and we're not
+	 * expecting to use any of the data we'd be reading in. That
+	 * is, when the page lies beyond the EOF, or straddles the EOF
+	 * and the write will cover all of the existing data.
+	 */
+	if (CIFS_CACHE_READ(CIFS_I(mapping->host))) {
+		i_size = i_size_read(mapping->host);
+		if (page_start >= i_size ||
+		    (offset == 0 && (pos + len) >= i_size)) {
+			zero_user_segments(page, 0, offset,
+					   offset + len,
+					   PAGE_SIZE);
+			/*
+			 * PageChecked means that the parts of the page
+			 * to which we're not writing are considered up
+			 * to date. Once the data is copied to the
+			 * page, it can be set uptodate.
+			 */
+			SetPageChecked(page);
+			goto out;
+		}
+	}
+
+	if ((file->f_flags & O_ACCMODE) != O_WRONLY && !oncethru) {
+		/*
+		 * might as well read a page, it is fast enough. If we get
+		 * an error, we don't need to return it. cifs_write_end will
+		 * do a sync write instead since PG_uptodate isn't set.
+		 */
+		cifs_readpage_worker(file, page, &page_start);
+		put_page(page);
+		oncethru = 1;
+		goto start;
+	} else {
+		/* we could try using another file handle if there is one -
+		   but how would we lock it to prevent close of that handle
+		   racing with this read? In any case
+		   this will be written out by write_end so is fine */
+	}
+out:
+	*pagep = page;
+	return rc;
+}
+
+static bool cifs_release_folio(struct folio *folio, gfp_t gfp)
+{
+	if (folio_test_private(folio))
+		return 0;
+	if (folio_test_fscache(folio)) {
+		if (current_is_kswapd() || !(gfp & __GFP_FS))
+			return false;
+		folio_wait_fscache(folio);
+	}
+	fscache_note_page_release(cifs_inode_cookie(folio->mapping->host));
+	return true;
+}
+
+static void cifs_invalidate_folio(struct folio *folio, size_t offset,
+				 size_t length)
+{
+	folio_wait_fscache(folio);
+}
+
+static int cifs_launder_folio(struct folio *folio)
+{
+	int rc = 0;
+	loff_t range_start = folio_pos(folio);
+	loff_t range_end = range_start + folio_size(folio);
+	struct writeback_control wbc = {
+		.sync_mode = WB_SYNC_ALL,
+		.nr_to_write = 0,
+		.range_start = range_start,
+		.range_end = range_end,
+	};
+
+	cifs_dbg(FYI, "Launder page: %lu\n", folio->index);
+
+	if (folio_clear_dirty_for_io(folio))
+		rc = cifs_writepage_locked(&folio->page, &wbc);
+
+	folio_wait_fscache(folio);
+	return rc;
+}
+
+void cifs_oplock_break(struct work_struct *work)
+{
+	struct cifsFileInfo *cfile = container_of(work, struct cifsFileInfo,
+						  oplock_break);
+	struct inode *inode = d_inode(cfile->dentry);
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct cifsInodeInfo *cinode = CIFS_I(inode);
+	struct cifs_tcon *tcon;
+	struct TCP_Server_Info *server;
+	struct tcon_link *tlink;
+	int rc = 0;
+	bool purge_cache = false, oplock_break_cancelled;
+	__u64 persistent_fid, volatile_fid;
+	__u16 net_fid;
+
+	wait_on_bit(&cinode->flags, CIFS_INODE_PENDING_WRITERS,
+			TASK_UNINTERRUPTIBLE);
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink))
+		goto out;
+	tcon = tlink_tcon(tlink);
+	server = tcon->ses->server;
+
+	server->ops->downgrade_oplock(server, cinode, cfile->oplock_level,
+				      cfile->oplock_epoch, &purge_cache);
+
+	if (!CIFS_CACHE_WRITE(cinode) && CIFS_CACHE_READ(cinode) &&
+						cifs_has_mand_locks(cinode)) {
+		cifs_dbg(FYI, "Reset oplock to None for inode=%p due to mand locks\n",
+			 inode);
+		cinode->oplock = 0;
+	}
+
+	if (inode && S_ISREG(inode->i_mode)) {
+		if (CIFS_CACHE_READ(cinode))
+			break_lease(inode, O_RDONLY);
+		else
+			break_lease(inode, O_WRONLY);
+		rc = filemap_fdatawrite(inode->i_mapping);
+		if (!CIFS_CACHE_READ(cinode) || purge_cache) {
+			rc = filemap_fdatawait(inode->i_mapping);
+			mapping_set_error(inode->i_mapping, rc);
+			cifs_zap_mapping(inode);
+		}
+		cifs_dbg(FYI, "Oplock flush inode %p rc %d\n", inode, rc);
+		if (CIFS_CACHE_WRITE(cinode))
+			goto oplock_break_ack;
+	}
+
+	rc = cifs_push_locks(cfile);
+	if (rc)
+		cifs_dbg(VFS, "Push locks rc = %d\n", rc);
+
+oplock_break_ack:
+	/*
+	 * When oplock break is received and there are no active
+	 * file handles but cached, then schedule deferred close immediately.
+	 * So, new open will not use cached handle.
+	 */
+
+	if (!CIFS_CACHE_HANDLE(cinode) && !list_empty(&cinode->deferred_closes))
+		cifs_close_deferred_file(cinode);
+
+	persistent_fid = cfile->fid.persistent_fid;
+	volatile_fid = cfile->fid.volatile_fid;
+	net_fid = cfile->fid.netfid;
+	oplock_break_cancelled = cfile->oplock_break_cancelled;
+
+	_cifsFileInfo_put(cfile, false /* do not wait for ourself */, false);
+	/*
+	 * MS-SMB2 3.2.5.19.1 and 3.2.5.19.2 (and MS-CIFS 3.2.5.42) do not require
+	 * an acknowledgment to be sent when the file has already been closed.
+	 */
+	spin_lock(&cinode->open_file_lock);
+	/* check list empty since can race with kill_sb calling tree disconnect */
+	if (!oplock_break_cancelled && !list_empty(&cinode->openFileList)) {
+		spin_unlock(&cinode->open_file_lock);
+		rc = server->ops->oplock_response(tcon, persistent_fid,
+						  volatile_fid, net_fid, cinode);
+		cifs_dbg(FYI, "Oplock release rc = %d\n", rc);
+	} else
+		spin_unlock(&cinode->open_file_lock);
+
+	cifs_put_tlink(tlink);
+out:
+	cifs_done_oplock_break(cinode);
+}
+
+/*
+ * The presence of cifs_direct_io() in the address space ops vector
+ * allowes open() O_DIRECT flags which would have failed otherwise.
+ *
+ * In the non-cached mode (mount with cache=none), we shunt off direct read and write requests
+ * so this method should never be called.
+ *
+ * Direct IO is not yet supported in the cached mode.
+ */
+static ssize_t
+cifs_direct_io(struct kiocb *iocb, struct iov_iter *iter)
+{
+        /*
+         * FIXME
+         * Eventually need to support direct IO for non forcedirectio mounts
+         */
+        return -EINVAL;
+}
+
+static int cifs_swap_activate(struct swap_info_struct *sis,
+			      struct file *swap_file, sector_t *span)
+{
+	struct cifsFileInfo *cfile = swap_file->private_data;
+	struct inode *inode = swap_file->f_mapping->host;
+	unsigned long blocks;
+	long long isize;
+
+	cifs_dbg(FYI, "swap activate\n");
+
+	if (!swap_file->f_mapping->a_ops->swap_rw)
+		/* Cannot support swap */
+		return -EINVAL;
+
+	spin_lock(&inode->i_lock);
+	blocks = inode->i_blocks;
+	isize = inode->i_size;
+	spin_unlock(&inode->i_lock);
+	if (blocks*512 < isize) {
+		pr_warn("swap activate: swapfile has holes\n");
+		return -EINVAL;
+	}
+	*span = sis->pages;
+
+	pr_warn_once("Swap support over SMB3 is experimental\n");
+
+	/*
+	 * TODO: consider adding ACL (or documenting how) to prevent other
+	 * users (on this or other systems) from reading it
+	 */
+
+
+	/* TODO: add sk_set_memalloc(inet) or similar */
+
+	if (cfile)
+		cfile->swapfile = true;
+	/*
+	 * TODO: Since file already open, we can't open with DENY_ALL here
+	 * but we could add call to grab a byte range lock to prevent others
+	 * from reading or writing the file
+	 */
+
+	sis->flags |= SWP_FS_OPS;
+	return add_swap_extent(sis, 0, sis->max, 0);
+}
+
+static void cifs_swap_deactivate(struct file *file)
+{
+	struct cifsFileInfo *cfile = file->private_data;
+
+	cifs_dbg(FYI, "swap deactivate\n");
+
+	/* TODO: undo sk_set_memalloc(inet) will eventually be needed */
+
+	if (cfile)
+		cfile->swapfile = false;
+
+	/* do we need to unpin (or unlock) the file */
+}
+
+/*
+ * Mark a page as having been made dirty and thus needing writeback.  We also
+ * need to pin the cache object to write back to.
+ */
+#ifdef CONFIG_CIFS_FSCACHE
+static bool cifs_dirty_folio(struct address_space *mapping, struct folio *folio)
+{
+	return fscache_dirty_folio(mapping, folio,
+					cifs_inode_cookie(mapping->host));
+}
+#else
+#define cifs_dirty_folio filemap_dirty_folio
+#endif
+
+const struct address_space_operations cifs_addr_ops = {
+	.read_folio = cifs_read_folio,
+	.readahead = cifs_readahead,
+	.writepages = cifs_writepages,
+	.write_begin = cifs_write_begin,
+	.write_end = cifs_write_end,
+	.dirty_folio = cifs_dirty_folio,
+	.release_folio = cifs_release_folio,
+	.direct_IO = cifs_direct_io,
+	.invalidate_folio = cifs_invalidate_folio,
+	.launder_folio = cifs_launder_folio,
+	.migrate_folio = filemap_migrate_folio,
+	/*
+	 * TODO: investigate and if useful we could add an is_dirty_writeback
+	 * helper if needed
+	 */
+	.swap_activate = cifs_swap_activate,
+	.swap_deactivate = cifs_swap_deactivate,
+};
+
+/*
+ * cifs_readahead requires the server to support a buffer large enough to
+ * contain the header plus one complete page of data.  Otherwise, we need
+ * to leave cifs_readahead out of the address space operations.
+ */
+const struct address_space_operations cifs_addr_ops_smallbuf = {
+	.read_folio = cifs_read_folio,
+	.writepages = cifs_writepages,
+	.write_begin = cifs_write_begin,
+	.write_end = cifs_write_end,
+	.dirty_folio = cifs_dirty_folio,
+	.release_folio = cifs_release_folio,
+	.invalidate_folio = cifs_invalidate_folio,
+	.launder_folio = cifs_launder_folio,
+	.migrate_folio = filemap_migrate_folio,
+};
diff --git a/fs/smb/client/fs_context.c b/fs/smb/client/fs_context.c
new file mode 100644
index 0000000000..a3493da12a
--- /dev/null
+++ b/fs/smb/client/fs_context.c
@@ -0,0 +1,1828 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *   Copyright (C) 2020, Microsoft Corporation.
+ *
+ *   Author(s): Steve French <stfrench@microsoft.com>
+ *              David Howells <dhowells@redhat.com>
+ */
+
+/*
+#include <linux/module.h>
+#include <linux/nsproxy.h>
+#include <linux/slab.h>
+#include <linux/magic.h>
+#include <linux/security.h>
+#include <net/net_namespace.h>
+#ifdef CONFIG_CIFS_DFS_UPCALL
+#include "dfs_cache.h"
+#endif
+*/
+
+#include <linux/ctype.h>
+#include <linux/fs_context.h>
+#include <linux/fs_parser.h>
+#include <linux/fs.h>
+#include <linux/mount.h>
+#include <linux/parser.h>
+#include <linux/utsname.h>
+#include "cifsfs.h"
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_unicode.h"
+#include "cifs_debug.h"
+#include "cifs_fs_sb.h"
+#include "ntlmssp.h"
+#include "nterr.h"
+#include "rfc1002pdu.h"
+#include "fs_context.h"
+
+static DEFINE_MUTEX(cifs_mount_mutex);
+
+static const match_table_t cifs_smb_version_tokens = {
+	{ Smb_1, SMB1_VERSION_STRING },
+	{ Smb_20, SMB20_VERSION_STRING},
+	{ Smb_21, SMB21_VERSION_STRING },
+	{ Smb_30, SMB30_VERSION_STRING },
+	{ Smb_302, SMB302_VERSION_STRING },
+	{ Smb_302, ALT_SMB302_VERSION_STRING },
+	{ Smb_311, SMB311_VERSION_STRING },
+	{ Smb_311, ALT_SMB311_VERSION_STRING },
+	{ Smb_3any, SMB3ANY_VERSION_STRING },
+	{ Smb_default, SMBDEFAULT_VERSION_STRING },
+	{ Smb_version_err, NULL }
+};
+
+static const match_table_t cifs_secflavor_tokens = {
+	{ Opt_sec_krb5, "krb5" },
+	{ Opt_sec_krb5i, "krb5i" },
+	{ Opt_sec_krb5p, "krb5p" },
+	{ Opt_sec_ntlmsspi, "ntlmsspi" },
+	{ Opt_sec_ntlmssp, "ntlmssp" },
+	{ Opt_sec_ntlmv2, "nontlm" },
+	{ Opt_sec_ntlmv2, "ntlmv2" },
+	{ Opt_sec_ntlmv2i, "ntlmv2i" },
+	{ Opt_sec_none, "none" },
+
+	{ Opt_sec_err, NULL }
+};
+
+const struct fs_parameter_spec smb3_fs_parameters[] = {
+	/* Mount options that take no arguments */
+	fsparam_flag_no("user_xattr", Opt_user_xattr),
+	fsparam_flag_no("forceuid", Opt_forceuid),
+	fsparam_flag_no("multichannel", Opt_multichannel),
+	fsparam_flag_no("forcegid", Opt_forcegid),
+	fsparam_flag("noblocksend", Opt_noblocksend),
+	fsparam_flag("noautotune", Opt_noautotune),
+	fsparam_flag("nolease", Opt_nolease),
+	fsparam_flag_no("hard", Opt_hard),
+	fsparam_flag_no("soft", Opt_soft),
+	fsparam_flag_no("perm", Opt_perm),
+	fsparam_flag("nodelete", Opt_nodelete),
+	fsparam_flag_no("mapposix", Opt_mapposix),
+	fsparam_flag("mapchars", Opt_mapchars),
+	fsparam_flag("nomapchars", Opt_nomapchars),
+	fsparam_flag_no("sfu", Opt_sfu),
+	fsparam_flag("nodfs", Opt_nodfs),
+	fsparam_flag_no("posixpaths", Opt_posixpaths),
+	fsparam_flag_no("unix", Opt_unix),
+	fsparam_flag_no("linux", Opt_unix),
+	fsparam_flag_no("posix", Opt_unix),
+	fsparam_flag("nocase", Opt_nocase),
+	fsparam_flag("ignorecase", Opt_nocase),
+	fsparam_flag_no("brl", Opt_brl),
+	fsparam_flag_no("handlecache", Opt_handlecache),
+	fsparam_flag("forcemandatorylock", Opt_forcemandatorylock),
+	fsparam_flag("forcemand", Opt_forcemandatorylock),
+	fsparam_flag("setuidfromacl", Opt_setuidfromacl),
+	fsparam_flag("idsfromsid", Opt_setuidfromacl),
+	fsparam_flag_no("setuids", Opt_setuids),
+	fsparam_flag_no("dynperm", Opt_dynperm),
+	fsparam_flag_no("intr", Opt_intr),
+	fsparam_flag_no("strictsync", Opt_strictsync),
+	fsparam_flag_no("serverino", Opt_serverino),
+	fsparam_flag("rwpidforward", Opt_rwpidforward),
+	fsparam_flag("cifsacl", Opt_cifsacl),
+	fsparam_flag_no("acl", Opt_acl),
+	fsparam_flag("locallease", Opt_locallease),
+	fsparam_flag("sign", Opt_sign),
+	fsparam_flag("ignore_signature", Opt_ignore_signature),
+	fsparam_flag("signloosely", Opt_ignore_signature),
+	fsparam_flag("seal", Opt_seal),
+	fsparam_flag("noac", Opt_noac),
+	fsparam_flag("fsc", Opt_fsc),
+	fsparam_flag("mfsymlinks", Opt_mfsymlinks),
+	fsparam_flag("multiuser", Opt_multiuser),
+	fsparam_flag("sloppy", Opt_sloppy),
+	fsparam_flag("nosharesock", Opt_nosharesock),
+	fsparam_flag_no("persistenthandles", Opt_persistent),
+	fsparam_flag_no("resilienthandles", Opt_resilient),
+	fsparam_flag_no("tcpnodelay", Opt_tcp_nodelay),
+	fsparam_flag("nosparse", Opt_nosparse),
+	fsparam_flag("domainauto", Opt_domainauto),
+	fsparam_flag("rdma", Opt_rdma),
+	fsparam_flag("modesid", Opt_modesid),
+	fsparam_flag("modefromsid", Opt_modesid),
+	fsparam_flag("rootfs", Opt_rootfs),
+	fsparam_flag("compress", Opt_compress),
+	fsparam_flag("witness", Opt_witness),
+
+	/* Mount options which take numeric value */
+	fsparam_u32("backupuid", Opt_backupuid),
+	fsparam_u32("backupgid", Opt_backupgid),
+	fsparam_u32("uid", Opt_uid),
+	fsparam_u32("cruid", Opt_cruid),
+	fsparam_u32("gid", Opt_gid),
+	fsparam_u32("file_mode", Opt_file_mode),
+	fsparam_u32("dirmode", Opt_dirmode),
+	fsparam_u32("dir_mode", Opt_dirmode),
+	fsparam_u32("port", Opt_port),
+	fsparam_u32("min_enc_offload", Opt_min_enc_offload),
+	fsparam_u32("esize", Opt_min_enc_offload),
+	fsparam_u32("bsize", Opt_blocksize),
+	fsparam_u32("rasize", Opt_rasize),
+	fsparam_u32("rsize", Opt_rsize),
+	fsparam_u32("wsize", Opt_wsize),
+	fsparam_u32("actimeo", Opt_actimeo),
+	fsparam_u32("acdirmax", Opt_acdirmax),
+	fsparam_u32("acregmax", Opt_acregmax),
+	fsparam_u32("closetimeo", Opt_closetimeo),
+	fsparam_u32("echo_interval", Opt_echo_interval),
+	fsparam_u32("max_credits", Opt_max_credits),
+	fsparam_u32("max_cached_dirs", Opt_max_cached_dirs),
+	fsparam_u32("handletimeout", Opt_handletimeout),
+	fsparam_u64("snapshot", Opt_snapshot),
+	fsparam_u32("max_channels", Opt_max_channels),
+
+	/* Mount options which take string value */
+	fsparam_string("source", Opt_source),
+	fsparam_string("user", Opt_user),
+	fsparam_string("username", Opt_user),
+	fsparam_string("pass", Opt_pass),
+	fsparam_string("password", Opt_pass),
+	fsparam_string("ip", Opt_ip),
+	fsparam_string("addr", Opt_ip),
+	fsparam_string("domain", Opt_domain),
+	fsparam_string("dom", Opt_domain),
+	fsparam_string("srcaddr", Opt_srcaddr),
+	fsparam_string("iocharset", Opt_iocharset),
+	fsparam_string("netbiosname", Opt_netbiosname),
+	fsparam_string("servern", Opt_servern),
+	fsparam_string("ver", Opt_ver),
+	fsparam_string("vers", Opt_vers),
+	fsparam_string("sec", Opt_sec),
+	fsparam_string("cache", Opt_cache),
+
+	/* Arguments that should be ignored */
+	fsparam_flag("guest", Opt_ignore),
+	fsparam_flag("noatime", Opt_ignore),
+	fsparam_flag("relatime", Opt_ignore),
+	fsparam_flag("_netdev", Opt_ignore),
+	fsparam_flag_no("suid", Opt_ignore),
+	fsparam_flag_no("exec", Opt_ignore),
+	fsparam_flag_no("dev", Opt_ignore),
+	fsparam_flag_no("mand", Opt_ignore),
+	fsparam_flag_no("auto", Opt_ignore),
+	fsparam_string("cred", Opt_ignore),
+	fsparam_string("credentials", Opt_ignore),
+	/*
+	 * UNC and prefixpath is now extracted from Opt_source
+	 * in the new mount API so we can just ignore them going forward.
+	 */
+	fsparam_string("unc", Opt_ignore),
+	fsparam_string("prefixpath", Opt_ignore),
+	{}
+};
+
+static int
+cifs_parse_security_flavors(struct fs_context *fc, char *value, struct smb3_fs_context *ctx)
+{
+
+	substring_t args[MAX_OPT_ARGS];
+
+	/*
+	 * With mount options, the last one should win. Reset any existing
+	 * settings back to default.
+	 */
+	ctx->sectype = Unspecified;
+	ctx->sign = false;
+
+	switch (match_token(value, cifs_secflavor_tokens, args)) {
+	case Opt_sec_krb5p:
+		cifs_errorf(fc, "sec=krb5p is not supported!\n");
+		return 1;
+	case Opt_sec_krb5i:
+		ctx->sign = true;
+		fallthrough;
+	case Opt_sec_krb5:
+		ctx->sectype = Kerberos;
+		break;
+	case Opt_sec_ntlmsspi:
+		ctx->sign = true;
+		fallthrough;
+	case Opt_sec_ntlmssp:
+		ctx->sectype = RawNTLMSSP;
+		break;
+	case Opt_sec_ntlmv2i:
+		ctx->sign = true;
+		fallthrough;
+	case Opt_sec_ntlmv2:
+		ctx->sectype = NTLMv2;
+		break;
+	case Opt_sec_none:
+		ctx->nullauth = 1;
+		kfree(ctx->username);
+		ctx->username = NULL;
+		break;
+	default:
+		cifs_errorf(fc, "bad security option: %s\n", value);
+		return 1;
+	}
+
+	return 0;
+}
+
+static const match_table_t cifs_cacheflavor_tokens = {
+	{ Opt_cache_loose, "loose" },
+	{ Opt_cache_strict, "strict" },
+	{ Opt_cache_none, "none" },
+	{ Opt_cache_ro, "ro" },
+	{ Opt_cache_rw, "singleclient" },
+	{ Opt_cache_err, NULL }
+};
+
+static int
+cifs_parse_cache_flavor(struct fs_context *fc, char *value, struct smb3_fs_context *ctx)
+{
+	substring_t args[MAX_OPT_ARGS];
+
+	switch (match_token(value, cifs_cacheflavor_tokens, args)) {
+	case Opt_cache_loose:
+		ctx->direct_io = false;
+		ctx->strict_io = false;
+		ctx->cache_ro = false;
+		ctx->cache_rw = false;
+		break;
+	case Opt_cache_strict:
+		ctx->direct_io = false;
+		ctx->strict_io = true;
+		ctx->cache_ro = false;
+		ctx->cache_rw = false;
+		break;
+	case Opt_cache_none:
+		ctx->direct_io = true;
+		ctx->strict_io = false;
+		ctx->cache_ro = false;
+		ctx->cache_rw = false;
+		break;
+	case Opt_cache_ro:
+		ctx->direct_io = false;
+		ctx->strict_io = false;
+		ctx->cache_ro = true;
+		ctx->cache_rw = false;
+		break;
+	case Opt_cache_rw:
+		ctx->direct_io = false;
+		ctx->strict_io = false;
+		ctx->cache_ro = false;
+		ctx->cache_rw = true;
+		break;
+	default:
+		cifs_errorf(fc, "bad cache= option: %s\n", value);
+		return 1;
+	}
+	return 0;
+}
+
+#define DUP_CTX_STR(field)						\
+do {									\
+	if (ctx->field) {						\
+		new_ctx->field = kstrdup(ctx->field, GFP_ATOMIC);	\
+		if (new_ctx->field == NULL) {				\
+			smb3_cleanup_fs_context_contents(new_ctx);	\
+			return -ENOMEM;					\
+		}							\
+	}								\
+} while (0)
+
+int
+smb3_fs_context_dup(struct smb3_fs_context *new_ctx, struct smb3_fs_context *ctx)
+{
+	memcpy(new_ctx, ctx, sizeof(*ctx));
+	new_ctx->prepath = NULL;
+	new_ctx->nodename = NULL;
+	new_ctx->username = NULL;
+	new_ctx->password = NULL;
+	new_ctx->server_hostname = NULL;
+	new_ctx->domainname = NULL;
+	new_ctx->UNC = NULL;
+	new_ctx->source = NULL;
+	new_ctx->iocharset = NULL;
+	new_ctx->leaf_fullpath = NULL;
+	/*
+	 * Make sure to stay in sync with smb3_cleanup_fs_context_contents()
+	 */
+	DUP_CTX_STR(prepath);
+	DUP_CTX_STR(username);
+	DUP_CTX_STR(password);
+	DUP_CTX_STR(server_hostname);
+	DUP_CTX_STR(UNC);
+	DUP_CTX_STR(source);
+	DUP_CTX_STR(domainname);
+	DUP_CTX_STR(nodename);
+	DUP_CTX_STR(iocharset);
+	DUP_CTX_STR(leaf_fullpath);
+
+	return 0;
+}
+
+static int
+cifs_parse_smb_version(struct fs_context *fc, char *value, struct smb3_fs_context *ctx, bool is_smb3)
+{
+	substring_t args[MAX_OPT_ARGS];
+
+	switch (match_token(value, cifs_smb_version_tokens, args)) {
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	case Smb_1:
+		if (disable_legacy_dialects) {
+			cifs_errorf(fc, "mount with legacy dialect disabled\n");
+			return 1;
+		}
+		if (is_smb3) {
+			cifs_errorf(fc, "vers=1.0 (cifs) not permitted when mounting with smb3\n");
+			return 1;
+		}
+		cifs_errorf(fc, "Use of the less secure dialect vers=1.0 is not recommended unless required for access to very old servers\n");
+		ctx->ops = &smb1_operations;
+		ctx->vals = &smb1_values;
+		break;
+	case Smb_20:
+		if (disable_legacy_dialects) {
+			cifs_errorf(fc, "mount with legacy dialect disabled\n");
+			return 1;
+		}
+		if (is_smb3) {
+			cifs_errorf(fc, "vers=2.0 not permitted when mounting with smb3\n");
+			return 1;
+		}
+		ctx->ops = &smb20_operations;
+		ctx->vals = &smb20_values;
+		break;
+#else
+	case Smb_1:
+		cifs_errorf(fc, "vers=1.0 (cifs) mount not permitted when legacy dialects disabled\n");
+		return 1;
+	case Smb_20:
+		cifs_errorf(fc, "vers=2.0 mount not permitted when legacy dialects disabled\n");
+		return 1;
+#endif /* CIFS_ALLOW_INSECURE_LEGACY */
+	case Smb_21:
+		ctx->ops = &smb21_operations;
+		ctx->vals = &smb21_values;
+		break;
+	case Smb_30:
+		ctx->ops = &smb30_operations;
+		ctx->vals = &smb30_values;
+		break;
+	case Smb_302:
+		ctx->ops = &smb30_operations; /* currently identical with 3.0 */
+		ctx->vals = &smb302_values;
+		break;
+	case Smb_311:
+		ctx->ops = &smb311_operations;
+		ctx->vals = &smb311_values;
+		break;
+	case Smb_3any:
+		ctx->ops = &smb30_operations; /* currently identical with 3.0 */
+		ctx->vals = &smb3any_values;
+		break;
+	case Smb_default:
+		ctx->ops = &smb30_operations;
+		ctx->vals = &smbdefault_values;
+		break;
+	default:
+		cifs_errorf(fc, "Unknown vers= option specified: %s\n", value);
+		return 1;
+	}
+	return 0;
+}
+
+int smb3_parse_opt(const char *options, const char *key, char **val)
+{
+	int rc = -ENOENT;
+	char *opts, *orig, *p;
+
+	orig = opts = kstrdup(options, GFP_KERNEL);
+	if (!opts)
+		return -ENOMEM;
+
+	while ((p = strsep(&opts, ","))) {
+		char *nval;
+
+		if (!*p)
+			continue;
+		if (strncasecmp(p, key, strlen(key)))
+			continue;
+		nval = strchr(p, '=');
+		if (nval) {
+			if (nval == p)
+				continue;
+			*nval++ = 0;
+			*val = kstrdup(nval, GFP_KERNEL);
+			rc = !*val ? -ENOMEM : 0;
+			goto out;
+		}
+	}
+out:
+	kfree(orig);
+	return rc;
+}
+
+/*
+ * Remove duplicate path delimiters. Windows is supposed to do that
+ * but there are some bugs that prevent rename from working if there are
+ * multiple delimiters.
+ *
+ * Return a sanitized duplicate of @path or NULL for empty prefix paths.
+ * Otherwise, return ERR_PTR.
+ *
+ * @gfp indicates the GFP_* flags for kstrdup.
+ * The caller is responsible for freeing the original.
+ */
+#define IS_DELIM(c) ((c) == '/' || (c) == '\\')
+char *cifs_sanitize_prepath(char *prepath, gfp_t gfp)
+{
+	char *cursor1 = prepath, *cursor2 = prepath;
+	char *s;
+
+	/* skip all prepended delimiters */
+	while (IS_DELIM(*cursor1))
+		cursor1++;
+
+	/* copy the first letter */
+	*cursor2 = *cursor1;
+
+	/* copy the remainder... */
+	while (*(cursor1++)) {
+		/* ... skipping all duplicated delimiters */
+		if (IS_DELIM(*cursor1) && IS_DELIM(*cursor2))
+			continue;
+		*(++cursor2) = *cursor1;
+	}
+
+	/* if the last character is a delimiter, skip it */
+	if (IS_DELIM(*(cursor2 - 1)))
+		cursor2--;
+
+	*cursor2 = '\0';
+	if (!*prepath)
+		return NULL;
+	s = kstrdup(prepath, gfp);
+	if (!s)
+		return ERR_PTR(-ENOMEM);
+	return s;
+}
+
+/*
+ * Return full path based on the values of @ctx->{UNC,prepath}.
+ *
+ * It is assumed that both values were already parsed by smb3_parse_devname().
+ */
+char *smb3_fs_context_fullpath(const struct smb3_fs_context *ctx, char dirsep)
+{
+	size_t ulen, plen;
+	char *s;
+
+	ulen = strlen(ctx->UNC);
+	plen = ctx->prepath ? strlen(ctx->prepath) + 1 : 0;
+
+	s = kmalloc(ulen + plen + 1, GFP_KERNEL);
+	if (!s)
+		return ERR_PTR(-ENOMEM);
+	memcpy(s, ctx->UNC, ulen);
+	if (plen) {
+		s[ulen] = dirsep;
+		memcpy(s + ulen + 1, ctx->prepath, plen);
+	}
+	s[ulen + plen] = '\0';
+	convert_delimiter(s, dirsep);
+	return s;
+}
+
+/*
+ * Parse a devname into substrings and populate the ctx->UNC and ctx->prepath
+ * fields with the result. Returns 0 on success and an error otherwise
+ * (e.g. ENOMEM or EINVAL)
+ */
+int
+smb3_parse_devname(const char *devname, struct smb3_fs_context *ctx)
+{
+	char *pos;
+	const char *delims = "/\\";
+	size_t len;
+	int rc;
+
+	if (unlikely(!devname || !*devname)) {
+		cifs_dbg(VFS, "Device name not specified\n");
+		return -EINVAL;
+	}
+
+	/* make sure we have a valid UNC double delimiter prefix */
+	len = strspn(devname, delims);
+	if (len != 2)
+		return -EINVAL;
+
+	/* find delimiter between host and sharename */
+	pos = strpbrk(devname + 2, delims);
+	if (!pos)
+		return -EINVAL;
+
+	/* record the server hostname */
+	kfree(ctx->server_hostname);
+	ctx->server_hostname = kstrndup(devname + 2, pos - devname - 2, GFP_KERNEL);
+	if (!ctx->server_hostname)
+		return -ENOMEM;
+
+	/* skip past delimiter */
+	++pos;
+
+	/* now go until next delimiter or end of string */
+	len = strcspn(pos, delims);
+	if (!len)
+		return -EINVAL;
+
+	/* move "pos" up to delimiter or NULL */
+	pos += len;
+	kfree(ctx->UNC);
+	ctx->UNC = kstrndup(devname, pos - devname, GFP_KERNEL);
+	if (!ctx->UNC)
+		return -ENOMEM;
+
+	convert_delimiter(ctx->UNC, '\\');
+
+	/* skip any delimiter */
+	if (*pos == '/' || *pos == '\\')
+		pos++;
+
+	kfree(ctx->prepath);
+	ctx->prepath = NULL;
+
+	/* If pos is NULL then no prepath */
+	if (!*pos)
+		return 0;
+
+	ctx->prepath = cifs_sanitize_prepath(pos, GFP_KERNEL);
+	if (IS_ERR(ctx->prepath)) {
+		rc = PTR_ERR(ctx->prepath);
+		ctx->prepath = NULL;
+		return rc;
+	}
+
+	return 0;
+}
+
+static void smb3_fs_context_free(struct fs_context *fc);
+static int smb3_fs_context_parse_param(struct fs_context *fc,
+				       struct fs_parameter *param);
+static int smb3_fs_context_parse_monolithic(struct fs_context *fc,
+					    void *data);
+static int smb3_get_tree(struct fs_context *fc);
+static int smb3_reconfigure(struct fs_context *fc);
+
+static const struct fs_context_operations smb3_fs_context_ops = {
+	.free			= smb3_fs_context_free,
+	.parse_param		= smb3_fs_context_parse_param,
+	.parse_monolithic	= smb3_fs_context_parse_monolithic,
+	.get_tree		= smb3_get_tree,
+	.reconfigure		= smb3_reconfigure,
+};
+
+/*
+ * Parse a monolithic block of data from sys_mount().
+ * smb3_fs_context_parse_monolithic - Parse key[=val][,key[=val]]* mount data
+ * @ctx: The superblock configuration to fill in.
+ * @data: The data to parse
+ *
+ * Parse a blob of data that's in key[=val][,key[=val]]* form.  This can be
+ * called from the ->monolithic_mount_data() fs_context operation.
+ *
+ * Returns 0 on success or the error returned by the ->parse_option() fs_context
+ * operation on failure.
+ */
+static int smb3_fs_context_parse_monolithic(struct fs_context *fc,
+					   void *data)
+{
+	char *options = data, *key;
+	int ret = 0;
+
+	if (!options)
+		return 0;
+
+	ret = security_sb_eat_lsm_opts(options, &fc->security);
+	if (ret)
+		return ret;
+
+	/* BB Need to add support for sep= here TBD */
+	while ((key = strsep(&options, ",")) != NULL) {
+		size_t len;
+		char *value;
+
+		if (*key == 0)
+			break;
+
+		/* Check if following character is the deliminator If yes,
+		 * we have encountered a double deliminator reset the NULL
+		 * character to the deliminator
+		 */
+		while (options && options[0] == ',') {
+			len = strlen(key);
+			strcpy(key + len, options);
+			options = strchr(options, ',');
+			if (options)
+				*options++ = 0;
+		}
+
+
+		len = 0;
+		value = strchr(key, '=');
+		if (value) {
+			if (value == key)
+				continue;
+			*value++ = 0;
+			len = strlen(value);
+		}
+
+		ret = vfs_parse_fs_string(fc, key, value, len);
+		if (ret < 0)
+			break;
+	}
+
+	return ret;
+}
+
+/*
+ * Validate the preparsed information in the config.
+ */
+static int smb3_fs_context_validate(struct fs_context *fc)
+{
+	struct smb3_fs_context *ctx = smb3_fc2context(fc);
+
+	if (ctx->rdma && ctx->vals->protocol_id < SMB30_PROT_ID) {
+		cifs_errorf(fc, "SMB Direct requires Version >=3.0\n");
+		return -EOPNOTSUPP;
+	}
+
+#ifndef CONFIG_KEYS
+	/* Muliuser mounts require CONFIG_KEYS support */
+	if (ctx->multiuser) {
+		cifs_errorf(fc, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n");
+		return -1;
+	}
+#endif
+
+	if (ctx->got_version == false)
+		pr_warn_once("No dialect specified on mount. Default has changed to a more secure dialect, SMB2.1 or later (e.g. SMB3.1.1), from CIFS (SMB1). To use the less secure SMB1 dialect to access old servers which do not support SMB3.1.1 (or even SMB3 or SMB2.1) specify vers=1.0 on mount.\n");
+
+
+	if (!ctx->UNC) {
+		cifs_errorf(fc, "CIFS mount error: No usable UNC path provided in device string!\n");
+		return -1;
+	}
+
+	/* make sure UNC has a share name */
+	if (strlen(ctx->UNC) < 3 || !strchr(ctx->UNC + 3, '\\')) {
+		cifs_errorf(fc, "Malformed UNC. Unable to find share name.\n");
+		return -ENOENT;
+	}
+
+	if (!ctx->got_ip) {
+		int len;
+		const char *slash;
+
+		/* No ip= option specified? Try to get it from UNC */
+		/* Use the address part of the UNC. */
+		slash = strchr(&ctx->UNC[2], '\\');
+		len = slash - &ctx->UNC[2];
+		if (!cifs_convert_address((struct sockaddr *)&ctx->dstaddr,
+					  &ctx->UNC[2], len)) {
+			pr_err("Unable to determine destination address\n");
+			return -EHOSTUNREACH;
+		}
+	}
+
+	/* set the port that we got earlier */
+	cifs_set_port((struct sockaddr *)&ctx->dstaddr, ctx->port);
+
+	if (ctx->override_uid && !ctx->uid_specified) {
+		ctx->override_uid = 0;
+		pr_notice("ignoring forceuid mount option specified with no uid= option\n");
+	}
+
+	if (ctx->override_gid && !ctx->gid_specified) {
+		ctx->override_gid = 0;
+		pr_notice("ignoring forcegid mount option specified with no gid= option\n");
+	}
+
+	return 0;
+}
+
+static int smb3_get_tree_common(struct fs_context *fc)
+{
+	struct smb3_fs_context *ctx = smb3_fc2context(fc);
+	struct dentry *root;
+	int rc = 0;
+
+	root = cifs_smb3_do_mount(fc->fs_type, 0, ctx);
+	if (IS_ERR(root))
+		return PTR_ERR(root);
+
+	fc->root = root;
+
+	return rc;
+}
+
+/*
+ * Create an SMB3 superblock from the parameters passed.
+ */
+static int smb3_get_tree(struct fs_context *fc)
+{
+	int err = smb3_fs_context_validate(fc);
+	int ret;
+
+	if (err)
+		return err;
+	mutex_lock(&cifs_mount_mutex);
+	ret = smb3_get_tree_common(fc);
+	mutex_unlock(&cifs_mount_mutex);
+	return ret;
+}
+
+static void smb3_fs_context_free(struct fs_context *fc)
+{
+	struct smb3_fs_context *ctx = smb3_fc2context(fc);
+
+	smb3_cleanup_fs_context(ctx);
+}
+
+/*
+ * Compare the old and new proposed context during reconfigure
+ * and check if the changes are compatible.
+ */
+static int smb3_verify_reconfigure_ctx(struct fs_context *fc,
+				       struct smb3_fs_context *new_ctx,
+				       struct smb3_fs_context *old_ctx)
+{
+	if (new_ctx->posix_paths != old_ctx->posix_paths) {
+		cifs_errorf(fc, "can not change posixpaths during remount\n");
+		return -EINVAL;
+	}
+	if (new_ctx->sectype != old_ctx->sectype) {
+		cifs_errorf(fc, "can not change sec during remount\n");
+		return -EINVAL;
+	}
+	if (new_ctx->multiuser != old_ctx->multiuser) {
+		cifs_errorf(fc, "can not change multiuser during remount\n");
+		return -EINVAL;
+	}
+	if (new_ctx->UNC &&
+	    (!old_ctx->UNC || strcmp(new_ctx->UNC, old_ctx->UNC))) {
+		cifs_errorf(fc, "can not change UNC during remount\n");
+		return -EINVAL;
+	}
+	if (new_ctx->username &&
+	    (!old_ctx->username || strcmp(new_ctx->username, old_ctx->username))) {
+		cifs_errorf(fc, "can not change username during remount\n");
+		return -EINVAL;
+	}
+	if (new_ctx->password &&
+	    (!old_ctx->password || strcmp(new_ctx->password, old_ctx->password))) {
+		cifs_errorf(fc, "can not change password during remount\n");
+		return -EINVAL;
+	}
+	if (new_ctx->domainname &&
+	    (!old_ctx->domainname || strcmp(new_ctx->domainname, old_ctx->domainname))) {
+		cifs_errorf(fc, "can not change domainname during remount\n");
+		return -EINVAL;
+	}
+	if (strcmp(new_ctx->workstation_name, old_ctx->workstation_name)) {
+		cifs_errorf(fc, "can not change workstation_name during remount\n");
+		return -EINVAL;
+	}
+	if (new_ctx->nodename &&
+	    (!old_ctx->nodename || strcmp(new_ctx->nodename, old_ctx->nodename))) {
+		cifs_errorf(fc, "can not change nodename during remount\n");
+		return -EINVAL;
+	}
+	if (new_ctx->iocharset &&
+	    (!old_ctx->iocharset || strcmp(new_ctx->iocharset, old_ctx->iocharset))) {
+		cifs_errorf(fc, "can not change iocharset during remount\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+#define STEAL_STRING(cifs_sb, ctx, field)				\
+do {									\
+	kfree(ctx->field);						\
+	ctx->field = cifs_sb->ctx->field;				\
+	cifs_sb->ctx->field = NULL;					\
+} while (0)
+
+#define STEAL_STRING_SENSITIVE(cifs_sb, ctx, field)			\
+do {									\
+	kfree_sensitive(ctx->field);					\
+	ctx->field = cifs_sb->ctx->field;				\
+	cifs_sb->ctx->field = NULL;					\
+} while (0)
+
+static int smb3_reconfigure(struct fs_context *fc)
+{
+	struct smb3_fs_context *ctx = smb3_fc2context(fc);
+	struct dentry *root = fc->root;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
+	int rc;
+
+	rc = smb3_verify_reconfigure_ctx(fc, ctx, cifs_sb->ctx);
+	if (rc)
+		return rc;
+
+	/*
+	 * We can not change UNC/username/password/domainname/
+	 * workstation_name/nodename/iocharset
+	 * during reconnect so ignore what we have in the new context and
+	 * just use what we already have in cifs_sb->ctx.
+	 */
+	STEAL_STRING(cifs_sb, ctx, UNC);
+	STEAL_STRING(cifs_sb, ctx, source);
+	STEAL_STRING(cifs_sb, ctx, username);
+	STEAL_STRING_SENSITIVE(cifs_sb, ctx, password);
+	STEAL_STRING(cifs_sb, ctx, domainname);
+	STEAL_STRING(cifs_sb, ctx, nodename);
+	STEAL_STRING(cifs_sb, ctx, iocharset);
+
+	/* if rsize or wsize not passed in on remount, use previous values */
+	if (ctx->rsize == 0)
+		ctx->rsize = cifs_sb->ctx->rsize;
+	if (ctx->wsize == 0)
+		ctx->wsize = cifs_sb->ctx->wsize;
+
+
+	smb3_cleanup_fs_context_contents(cifs_sb->ctx);
+	rc = smb3_fs_context_dup(cifs_sb->ctx, ctx);
+	smb3_update_mnt_flags(cifs_sb);
+#ifdef CONFIG_CIFS_DFS_UPCALL
+	if (!rc)
+		rc = dfs_cache_remount_fs(cifs_sb);
+#endif
+
+	return rc;
+}
+
+static int smb3_fs_context_parse_param(struct fs_context *fc,
+				      struct fs_parameter *param)
+{
+	struct fs_parse_result result;
+	struct smb3_fs_context *ctx = smb3_fc2context(fc);
+	int i, opt;
+	bool is_smb3 = !strcmp(fc->fs_type->name, "smb3");
+	bool skip_parsing = false;
+	kuid_t uid;
+	kgid_t gid;
+
+	cifs_dbg(FYI, "CIFS: parsing cifs mount option '%s'\n", param->key);
+
+	/*
+	 * fs_parse can not handle string options with an empty value so
+	 * we will need special handling of them.
+	 */
+	if (param->type == fs_value_is_string && param->string[0] == 0) {
+		if (!strcmp("pass", param->key) || !strcmp("password", param->key)) {
+			skip_parsing = true;
+			opt = Opt_pass;
+		} else if (!strcmp("user", param->key) || !strcmp("username", param->key)) {
+			skip_parsing = true;
+			opt = Opt_user;
+		}
+	}
+
+	if (!skip_parsing) {
+		opt = fs_parse(fc, smb3_fs_parameters, param, &result);
+		if (opt < 0)
+			return ctx->sloppy ? 1 : opt;
+	}
+
+	switch (opt) {
+	case Opt_compress:
+		ctx->compression = UNKNOWN_TYPE;
+		cifs_dbg(VFS,
+			"SMB3 compression support is experimental\n");
+		break;
+	case Opt_nodfs:
+		ctx->nodfs = 1;
+		break;
+	case Opt_hard:
+		if (result.negated) {
+			if (ctx->retry == 1)
+				cifs_dbg(VFS, "conflicting hard vs. soft mount options\n");
+			ctx->retry = 0;
+		} else
+			ctx->retry = 1;
+		break;
+	case Opt_soft:
+		if (result.negated)
+			ctx->retry = 1;
+		else {
+			if (ctx->retry == 1)
+				cifs_dbg(VFS, "conflicting hard vs soft mount options\n");
+			ctx->retry = 0;
+		}
+		break;
+	case Opt_mapposix:
+		if (result.negated)
+			ctx->remap = false;
+		else {
+			ctx->remap = true;
+			ctx->sfu_remap = false; /* disable SFU mapping */
+		}
+		break;
+	case Opt_mapchars:
+		if (result.negated)
+			ctx->sfu_remap = false;
+		else {
+			ctx->sfu_remap = true;
+			ctx->remap = false; /* disable SFM (mapposix) mapping */
+		}
+		break;
+	case Opt_user_xattr:
+		if (result.negated)
+			ctx->no_xattr = 1;
+		else
+			ctx->no_xattr = 0;
+		break;
+	case Opt_forceuid:
+		if (result.negated)
+			ctx->override_uid = 0;
+		else
+			ctx->override_uid = 1;
+		break;
+	case Opt_forcegid:
+		if (result.negated)
+			ctx->override_gid = 0;
+		else
+			ctx->override_gid = 1;
+		break;
+	case Opt_perm:
+		if (result.negated)
+			ctx->noperm = 1;
+		else
+			ctx->noperm = 0;
+		break;
+	case Opt_dynperm:
+		if (result.negated)
+			ctx->dynperm = 0;
+		else
+			ctx->dynperm = 1;
+		break;
+	case Opt_sfu:
+		if (result.negated)
+			ctx->sfu_emul = 0;
+		else
+			ctx->sfu_emul = 1;
+		break;
+	case Opt_noblocksend:
+		ctx->noblocksnd = 1;
+		break;
+	case Opt_noautotune:
+		ctx->noautotune = 1;
+		break;
+	case Opt_nolease:
+		ctx->no_lease = 1;
+		break;
+	case Opt_nosparse:
+		ctx->no_sparse = 1;
+		break;
+	case Opt_nodelete:
+		ctx->nodelete = 1;
+		break;
+	case Opt_multichannel:
+		if (result.negated) {
+			ctx->multichannel = false;
+			ctx->max_channels = 1;
+		} else {
+			ctx->multichannel = true;
+			/* if number of channels not specified, default to 2 */
+			if (ctx->max_channels < 2)
+				ctx->max_channels = 2;
+		}
+		break;
+	case Opt_uid:
+		uid = make_kuid(current_user_ns(), result.uint_32);
+		if (!uid_valid(uid))
+			goto cifs_parse_mount_err;
+		ctx->linux_uid = uid;
+		ctx->uid_specified = true;
+		break;
+	case Opt_cruid:
+		uid = make_kuid(current_user_ns(), result.uint_32);
+		if (!uid_valid(uid))
+			goto cifs_parse_mount_err;
+		ctx->cred_uid = uid;
+		ctx->cruid_specified = true;
+		break;
+	case Opt_backupuid:
+		uid = make_kuid(current_user_ns(), result.uint_32);
+		if (!uid_valid(uid))
+			goto cifs_parse_mount_err;
+		ctx->backupuid = uid;
+		ctx->backupuid_specified = true;
+		break;
+	case Opt_backupgid:
+		gid = make_kgid(current_user_ns(), result.uint_32);
+		if (!gid_valid(gid))
+			goto cifs_parse_mount_err;
+		ctx->backupgid = gid;
+		ctx->backupgid_specified = true;
+		break;
+	case Opt_gid:
+		gid = make_kgid(current_user_ns(), result.uint_32);
+		if (!gid_valid(gid))
+			goto cifs_parse_mount_err;
+		ctx->linux_gid = gid;
+		ctx->gid_specified = true;
+		break;
+	case Opt_port:
+		ctx->port = result.uint_32;
+		break;
+	case Opt_file_mode:
+		ctx->file_mode = result.uint_32;
+		break;
+	case Opt_dirmode:
+		ctx->dir_mode = result.uint_32;
+		break;
+	case Opt_min_enc_offload:
+		ctx->min_offload = result.uint_32;
+		break;
+	case Opt_blocksize:
+		/*
+		 * inode blocksize realistically should never need to be
+		 * less than 16K or greater than 16M and default is 1MB.
+		 * Note that small inode block sizes (e.g. 64K) can lead
+		 * to very poor performance of common tools like cp and scp
+		 */
+		if ((result.uint_32 < CIFS_MAX_MSGSIZE) ||
+		   (result.uint_32 > (4 * SMB3_DEFAULT_IOSIZE))) {
+			cifs_errorf(fc, "%s: Invalid blocksize\n",
+				__func__);
+			goto cifs_parse_mount_err;
+		}
+		ctx->bsize = result.uint_32;
+		ctx->got_bsize = true;
+		break;
+	case Opt_rasize:
+		/*
+		 * readahead size realistically should never need to be
+		 * less than 1M (CIFS_DEFAULT_IOSIZE) or greater than 32M
+		 * (perhaps an exception should be considered in the
+		 * for the case of a large number of channels
+		 * when multichannel is negotiated) since that would lead
+		 * to plenty of parallel I/O in flight to the server.
+		 * Note that smaller read ahead sizes would
+		 * hurt performance of common tools like cp and scp
+		 * which often trigger sequential i/o with read ahead
+		 */
+		if ((result.uint_32 > (8 * SMB3_DEFAULT_IOSIZE)) ||
+		    (result.uint_32 < CIFS_DEFAULT_IOSIZE)) {
+			cifs_errorf(fc, "%s: Invalid rasize %d vs. %d\n",
+				__func__, result.uint_32, SMB3_DEFAULT_IOSIZE);
+			goto cifs_parse_mount_err;
+		}
+		ctx->rasize = result.uint_32;
+		break;
+	case Opt_rsize:
+		ctx->rsize = result.uint_32;
+		ctx->got_rsize = true;
+		break;
+	case Opt_wsize:
+		ctx->wsize = result.uint_32;
+		ctx->got_wsize = true;
+		break;
+	case Opt_acregmax:
+		ctx->acregmax = HZ * result.uint_32;
+		if (ctx->acregmax > CIFS_MAX_ACTIMEO) {
+			cifs_errorf(fc, "acregmax too large\n");
+			goto cifs_parse_mount_err;
+		}
+		break;
+	case Opt_acdirmax:
+		ctx->acdirmax = HZ * result.uint_32;
+		if (ctx->acdirmax > CIFS_MAX_ACTIMEO) {
+			cifs_errorf(fc, "acdirmax too large\n");
+			goto cifs_parse_mount_err;
+		}
+		break;
+	case Opt_actimeo:
+		if (HZ * result.uint_32 > CIFS_MAX_ACTIMEO) {
+			cifs_errorf(fc, "timeout too large\n");
+			goto cifs_parse_mount_err;
+		}
+		if ((ctx->acdirmax != CIFS_DEF_ACTIMEO) ||
+		    (ctx->acregmax != CIFS_DEF_ACTIMEO)) {
+			cifs_errorf(fc, "actimeo ignored since acregmax or acdirmax specified\n");
+			break;
+		}
+		ctx->acdirmax = ctx->acregmax = HZ * result.uint_32;
+		break;
+	case Opt_closetimeo:
+		ctx->closetimeo = HZ * result.uint_32;
+		if (ctx->closetimeo > SMB3_MAX_DCLOSETIMEO) {
+			cifs_errorf(fc, "closetimeo too large\n");
+			goto cifs_parse_mount_err;
+		}
+		break;
+	case Opt_echo_interval:
+		ctx->echo_interval = result.uint_32;
+		break;
+	case Opt_snapshot:
+		ctx->snapshot_time = result.uint_64;
+		break;
+	case Opt_max_credits:
+		if (result.uint_32 < 20 || result.uint_32 > 60000) {
+			cifs_errorf(fc, "%s: Invalid max_credits value\n",
+				 __func__);
+			goto cifs_parse_mount_err;
+		}
+		ctx->max_credits = result.uint_32;
+		break;
+	case Opt_max_channels:
+		if (result.uint_32 < 1 || result.uint_32 > CIFS_MAX_CHANNELS) {
+			cifs_errorf(fc, "%s: Invalid max_channels value, needs to be 1-%d\n",
+				 __func__, CIFS_MAX_CHANNELS);
+			goto cifs_parse_mount_err;
+		}
+		ctx->max_channels = result.uint_32;
+		/* If more than one channel requested ... they want multichan */
+		if (result.uint_32 > 1)
+			ctx->multichannel = true;
+		break;
+	case Opt_max_cached_dirs:
+		if (result.uint_32 < 1) {
+			cifs_errorf(fc, "%s: Invalid max_cached_dirs, needs to be 1 or more\n",
+				    __func__);
+			goto cifs_parse_mount_err;
+		}
+		ctx->max_cached_dirs = result.uint_32;
+		break;
+	case Opt_handletimeout:
+		ctx->handle_timeout = result.uint_32;
+		if (ctx->handle_timeout > SMB3_MAX_HANDLE_TIMEOUT) {
+			cifs_errorf(fc, "Invalid handle cache timeout, longer than 16 minutes\n");
+			goto cifs_parse_mount_err;
+		}
+		break;
+	case Opt_source:
+		kfree(ctx->UNC);
+		ctx->UNC = NULL;
+		switch (smb3_parse_devname(param->string, ctx)) {
+		case 0:
+			break;
+		case -ENOMEM:
+			cifs_errorf(fc, "Unable to allocate memory for devname\n");
+			goto cifs_parse_mount_err;
+		case -EINVAL:
+			cifs_errorf(fc, "Malformed UNC in devname\n");
+			goto cifs_parse_mount_err;
+		default:
+			cifs_errorf(fc, "Unknown error parsing devname\n");
+			goto cifs_parse_mount_err;
+		}
+		ctx->source = smb3_fs_context_fullpath(ctx, '/');
+		if (IS_ERR(ctx->source)) {
+			ctx->source = NULL;
+			cifs_errorf(fc, "OOM when copying UNC string\n");
+			goto cifs_parse_mount_err;
+		}
+		fc->source = kstrdup(ctx->source, GFP_KERNEL);
+		if (fc->source == NULL) {
+			cifs_errorf(fc, "OOM when copying UNC string\n");
+			goto cifs_parse_mount_err;
+		}
+		break;
+	case Opt_user:
+		kfree(ctx->username);
+		ctx->username = NULL;
+		if (ctx->nullauth)
+			break;
+		if (strlen(param->string) == 0) {
+			/* null user, ie. anonymous authentication */
+			ctx->nullauth = 1;
+			break;
+		}
+
+		if (strnlen(param->string, CIFS_MAX_USERNAME_LEN) >
+		    CIFS_MAX_USERNAME_LEN) {
+			pr_warn("username too long\n");
+			goto cifs_parse_mount_err;
+		}
+		ctx->username = kstrdup(param->string, GFP_KERNEL);
+		if (ctx->username == NULL) {
+			cifs_errorf(fc, "OOM when copying username string\n");
+			goto cifs_parse_mount_err;
+		}
+		break;
+	case Opt_pass:
+		kfree_sensitive(ctx->password);
+		ctx->password = NULL;
+		if (strlen(param->string) == 0)
+			break;
+
+		ctx->password = kstrdup(param->string, GFP_KERNEL);
+		if (ctx->password == NULL) {
+			cifs_errorf(fc, "OOM when copying password string\n");
+			goto cifs_parse_mount_err;
+		}
+		break;
+	case Opt_ip:
+		if (strlen(param->string) == 0) {
+			ctx->got_ip = false;
+			break;
+		}
+		if (!cifs_convert_address((struct sockaddr *)&ctx->dstaddr,
+					  param->string,
+					  strlen(param->string))) {
+			pr_err("bad ip= option (%s)\n", param->string);
+			goto cifs_parse_mount_err;
+		}
+		ctx->got_ip = true;
+		break;
+	case Opt_domain:
+		if (strnlen(param->string, CIFS_MAX_DOMAINNAME_LEN)
+				== CIFS_MAX_DOMAINNAME_LEN) {
+			pr_warn("domain name too long\n");
+			goto cifs_parse_mount_err;
+		}
+
+		kfree(ctx->domainname);
+		ctx->domainname = kstrdup(param->string, GFP_KERNEL);
+		if (ctx->domainname == NULL) {
+			cifs_errorf(fc, "OOM when copying domainname string\n");
+			goto cifs_parse_mount_err;
+		}
+		cifs_dbg(FYI, "Domain name set\n");
+		break;
+	case Opt_srcaddr:
+		if (!cifs_convert_address(
+				(struct sockaddr *)&ctx->srcaddr,
+				param->string, strlen(param->string))) {
+			pr_warn("Could not parse srcaddr: %s\n",
+				param->string);
+			goto cifs_parse_mount_err;
+		}
+		break;
+	case Opt_iocharset:
+		if (strnlen(param->string, 1024) >= 65) {
+			pr_warn("iocharset name too long\n");
+			goto cifs_parse_mount_err;
+		}
+
+		if (strncasecmp(param->string, "default", 7) != 0) {
+			kfree(ctx->iocharset);
+			ctx->iocharset = kstrdup(param->string, GFP_KERNEL);
+			if (ctx->iocharset == NULL) {
+				cifs_errorf(fc, "OOM when copying iocharset string\n");
+				goto cifs_parse_mount_err;
+			}
+		}
+		/* if iocharset not set then load_nls_default
+		 * is used by caller
+		 */
+		cifs_dbg(FYI, "iocharset set to %s\n", ctx->iocharset);
+		break;
+	case Opt_netbiosname:
+		memset(ctx->source_rfc1001_name, 0x20,
+			RFC1001_NAME_LEN);
+		/*
+		 * FIXME: are there cases in which a comma can
+		 * be valid in workstation netbios name (and
+		 * need special handling)?
+		 */
+		for (i = 0; i < RFC1001_NAME_LEN; i++) {
+			/* don't ucase netbiosname for user */
+			if (param->string[i] == 0)
+				break;
+			ctx->source_rfc1001_name[i] = param->string[i];
+		}
+		/* The string has 16th byte zero still from
+		 * set at top of the function
+		 */
+		if (i == RFC1001_NAME_LEN && param->string[i] != 0)
+			pr_warn("netbiosname longer than 15 truncated\n");
+		break;
+	case Opt_servern:
+		/* last byte, type, is 0x20 for servr type */
+		memset(ctx->target_rfc1001_name, 0x20,
+			RFC1001_NAME_LEN_WITH_NULL);
+		/*
+		 * BB are there cases in which a comma can be valid in this
+		 * workstation netbios name (and need special handling)?
+		 */
+
+		/* user or mount helper must uppercase the netbios name */
+		for (i = 0; i < 15; i++) {
+			if (param->string[i] == 0)
+				break;
+			ctx->target_rfc1001_name[i] = param->string[i];
+		}
+
+		/* The string has 16th byte zero still from set at top of function */
+		if (i == RFC1001_NAME_LEN && param->string[i] != 0)
+			pr_warn("server netbiosname longer than 15 truncated\n");
+		break;
+	case Opt_ver:
+		/* version of mount userspace tools, not dialect */
+		/* If interface changes in mount.cifs bump to new ver */
+		if (strncasecmp(param->string, "1", 1) == 0) {
+			if (strlen(param->string) > 1) {
+				pr_warn("Bad mount helper ver=%s. Did you want SMB1 (CIFS) dialect and mean to type vers=1.0 instead?\n",
+					param->string);
+				goto cifs_parse_mount_err;
+			}
+			/* This is the default */
+			break;
+		}
+		/* For all other value, error */
+		pr_warn("Invalid mount helper version specified\n");
+		goto cifs_parse_mount_err;
+	case Opt_vers:
+		/* protocol version (dialect) */
+		if (cifs_parse_smb_version(fc, param->string, ctx, is_smb3) != 0)
+			goto cifs_parse_mount_err;
+		ctx->got_version = true;
+		break;
+	case Opt_sec:
+		if (cifs_parse_security_flavors(fc, param->string, ctx) != 0)
+			goto cifs_parse_mount_err;
+		break;
+	case Opt_cache:
+		if (cifs_parse_cache_flavor(fc, param->string, ctx) != 0)
+			goto cifs_parse_mount_err;
+		break;
+	case Opt_witness:
+#ifndef CONFIG_CIFS_SWN_UPCALL
+		cifs_errorf(fc, "Witness support needs CONFIG_CIFS_SWN_UPCALL config option\n");
+			goto cifs_parse_mount_err;
+#endif
+		ctx->witness = true;
+		pr_warn_once("Witness protocol support is experimental\n");
+		break;
+	case Opt_rootfs:
+#ifndef CONFIG_CIFS_ROOT
+		cifs_dbg(VFS, "rootfs support requires CONFIG_CIFS_ROOT config option\n");
+		goto cifs_parse_mount_err;
+#endif
+		ctx->rootfs = true;
+		break;
+	case Opt_posixpaths:
+		if (result.negated)
+			ctx->posix_paths = 0;
+		else
+			ctx->posix_paths = 1;
+		break;
+	case Opt_unix:
+		if (result.negated) {
+			if (ctx->linux_ext == 1)
+				pr_warn_once("conflicting posix mount options specified\n");
+			ctx->linux_ext = 0;
+			ctx->no_linux_ext = 1;
+		} else {
+			if (ctx->no_linux_ext == 1)
+				pr_warn_once("conflicting posix mount options specified\n");
+			ctx->linux_ext = 1;
+			ctx->no_linux_ext = 0;
+		}
+		break;
+	case Opt_nocase:
+		ctx->nocase = 1;
+		break;
+	case Opt_brl:
+		if (result.negated) {
+			/*
+			 * turn off mandatory locking in mode
+			 * if remote locking is turned off since the
+			 * local vfs will do advisory
+			 */
+			if (ctx->file_mode ==
+				(S_IALLUGO & ~(S_ISUID | S_IXGRP)))
+				ctx->file_mode = S_IALLUGO;
+			ctx->nobrl =  1;
+		} else
+			ctx->nobrl =  0;
+		break;
+	case Opt_handlecache:
+		if (result.negated)
+			ctx->nohandlecache = 1;
+		else
+			ctx->nohandlecache = 0;
+		break;
+	case Opt_forcemandatorylock:
+		ctx->mand_lock = 1;
+		break;
+	case Opt_setuids:
+		ctx->setuids = result.negated;
+		break;
+	case Opt_intr:
+		ctx->intr = !result.negated;
+		break;
+	case Opt_setuidfromacl:
+		ctx->setuidfromacl = 1;
+		break;
+	case Opt_strictsync:
+		ctx->nostrictsync = result.negated;
+		break;
+	case Opt_serverino:
+		ctx->server_ino = !result.negated;
+		break;
+	case Opt_rwpidforward:
+		ctx->rwpidforward = 1;
+		break;
+	case Opt_modesid:
+		ctx->mode_ace = 1;
+		break;
+	case Opt_cifsacl:
+		ctx->cifs_acl = !result.negated;
+		break;
+	case Opt_acl:
+		ctx->no_psx_acl = result.negated;
+		break;
+	case Opt_locallease:
+		ctx->local_lease = 1;
+		break;
+	case Opt_sign:
+		ctx->sign = true;
+		break;
+	case Opt_ignore_signature:
+		ctx->sign = true;
+		ctx->ignore_signature = true;
+		break;
+	case Opt_seal:
+		/* we do not do the following in secFlags because seal
+		 * is a per tree connection (mount) not a per socket
+		 * or per-smb connection option in the protocol
+		 * vol->secFlg |= CIFSSEC_MUST_SEAL;
+		 */
+		ctx->seal = 1;
+		break;
+	case Opt_noac:
+		pr_warn("Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n");
+		break;
+	case Opt_fsc:
+#ifndef CONFIG_CIFS_FSCACHE
+		cifs_errorf(fc, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n");
+		goto cifs_parse_mount_err;
+#endif
+		ctx->fsc = true;
+		break;
+	case Opt_mfsymlinks:
+		ctx->mfsymlinks = true;
+		break;
+	case Opt_multiuser:
+		ctx->multiuser = true;
+		break;
+	case Opt_sloppy:
+		ctx->sloppy = true;
+		break;
+	case Opt_nosharesock:
+		ctx->nosharesock = true;
+		break;
+	case Opt_persistent:
+		if (result.negated) {
+			ctx->nopersistent = true;
+			if (ctx->persistent) {
+				cifs_errorf(fc, "persistenthandles mount options conflict\n");
+				goto cifs_parse_mount_err;
+			}
+		} else {
+			ctx->persistent = true;
+			if ((ctx->nopersistent) || (ctx->resilient)) {
+				cifs_errorf(fc, "persistenthandles mount options conflict\n");
+				goto cifs_parse_mount_err;
+			}
+		}
+		break;
+	case Opt_resilient:
+		if (result.negated) {
+			ctx->resilient = false; /* already the default */
+		} else {
+			ctx->resilient = true;
+			if (ctx->persistent) {
+				cifs_errorf(fc, "persistenthandles mount options conflict\n");
+				goto cifs_parse_mount_err;
+			}
+		}
+		break;
+	case Opt_tcp_nodelay:
+		/* tcp nodelay should not usually be needed since we CORK/UNCORK the socket */
+		if (result.negated)
+			ctx->sockopt_tcp_nodelay = false;
+		else
+			ctx->sockopt_tcp_nodelay = true;
+		break;
+	case Opt_domainauto:
+		ctx->domainauto = true;
+		break;
+	case Opt_rdma:
+		ctx->rdma = true;
+		break;
+	}
+	/* case Opt_ignore: - is ignored as expected ... */
+
+	return 0;
+
+ cifs_parse_mount_err:
+	kfree_sensitive(ctx->password);
+	ctx->password = NULL;
+	return -EINVAL;
+}
+
+int smb3_init_fs_context(struct fs_context *fc)
+{
+	struct smb3_fs_context *ctx;
+	char *nodename = utsname()->nodename;
+	int i;
+
+	ctx = kzalloc(sizeof(struct smb3_fs_context), GFP_KERNEL);
+	if (unlikely(!ctx))
+		return -ENOMEM;
+
+	strscpy(ctx->workstation_name, nodename, sizeof(ctx->workstation_name));
+
+	/*
+	 * does not have to be perfect mapping since field is
+	 * informational, only used for servers that do not support
+	 * port 445 and it can be overridden at mount time
+	 */
+	memset(ctx->source_rfc1001_name, 0x20, RFC1001_NAME_LEN);
+	for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++)
+		ctx->source_rfc1001_name[i] = toupper(nodename[i]);
+
+	ctx->source_rfc1001_name[RFC1001_NAME_LEN] = 0;
+	/*
+	 * null target name indicates to use *SMBSERVR default called name
+	 *  if we end up sending RFC1001 session initialize
+	 */
+	ctx->target_rfc1001_name[0] = 0;
+	ctx->cred_uid = current_uid();
+	ctx->linux_uid = current_uid();
+	ctx->linux_gid = current_gid();
+	/* By default 4MB read ahead size, 1MB block size */
+	ctx->bsize = CIFS_DEFAULT_IOSIZE; /* can improve cp performance significantly */
+	ctx->rasize = 0; /* 0 = use default (ie negotiated rsize) for read ahead pages */
+
+	/*
+	 * default to SFM style remapping of seven reserved characters
+	 * unless user overrides it or we negotiate CIFS POSIX where
+	 * it is unnecessary.  Can not simultaneously use more than one mapping
+	 * since then readdir could list files that open could not open
+	 */
+	ctx->remap = true;
+
+	/* default to only allowing write access to owner of the mount */
+	ctx->dir_mode = ctx->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
+
+	/* ctx->retry default is 0 (i.e. "soft" limited retry not hard retry) */
+	/* default is always to request posix paths. */
+	ctx->posix_paths = 1;
+	/* default to using server inode numbers where available */
+	ctx->server_ino = 1;
+
+	/* default is to use strict cifs caching semantics */
+	ctx->strict_io = true;
+
+	ctx->acregmax = CIFS_DEF_ACTIMEO;
+	ctx->acdirmax = CIFS_DEF_ACTIMEO;
+	ctx->closetimeo = SMB3_DEF_DCLOSETIMEO;
+	ctx->max_cached_dirs = MAX_CACHED_FIDS;
+	/* Most clients set timeout to 0, allows server to use its default */
+	ctx->handle_timeout = 0; /* See MS-SMB2 spec section 2.2.14.2.12 */
+
+	/* offer SMB2.1 and later (SMB3 etc). Secure and widely accepted */
+	ctx->ops = &smb30_operations;
+	ctx->vals = &smbdefault_values;
+
+	ctx->echo_interval = SMB_ECHO_INTERVAL_DEFAULT;
+
+	/* default to no multichannel (single server connection) */
+	ctx->multichannel = false;
+	ctx->max_channels = 1;
+
+	ctx->backupuid_specified = false; /* no backup intent for a user */
+	ctx->backupgid_specified = false; /* no backup intent for a group */
+
+/*
+ *	short int override_uid = -1;
+ *	short int override_gid = -1;
+ *	char *nodename = strdup(utsname()->nodename);
+ *	struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr;
+ */
+
+	fc->fs_private = ctx;
+	fc->ops = &smb3_fs_context_ops;
+	return 0;
+}
+
+void
+smb3_cleanup_fs_context_contents(struct smb3_fs_context *ctx)
+{
+	if (ctx == NULL)
+		return;
+
+	/*
+	 * Make sure this stays in sync with smb3_fs_context_dup()
+	 */
+	kfree(ctx->username);
+	ctx->username = NULL;
+	kfree_sensitive(ctx->password);
+	ctx->password = NULL;
+	kfree(ctx->server_hostname);
+	ctx->server_hostname = NULL;
+	kfree(ctx->UNC);
+	ctx->UNC = NULL;
+	kfree(ctx->source);
+	ctx->source = NULL;
+	kfree(ctx->domainname);
+	ctx->domainname = NULL;
+	kfree(ctx->nodename);
+	ctx->nodename = NULL;
+	kfree(ctx->iocharset);
+	ctx->iocharset = NULL;
+	kfree(ctx->prepath);
+	ctx->prepath = NULL;
+	kfree(ctx->leaf_fullpath);
+	ctx->leaf_fullpath = NULL;
+}
+
+void
+smb3_cleanup_fs_context(struct smb3_fs_context *ctx)
+{
+	if (!ctx)
+		return;
+	smb3_cleanup_fs_context_contents(ctx);
+	kfree(ctx);
+}
+
+void smb3_update_mnt_flags(struct cifs_sb_info *cifs_sb)
+{
+	struct smb3_fs_context *ctx = cifs_sb->ctx;
+
+	if (ctx->nodfs)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_DFS;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_DFS;
+
+	if (ctx->noperm)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_PERM;
+
+	if (ctx->setuids)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SET_UID;
+
+	if (ctx->setuidfromacl)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UID_FROM_ACL;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_UID_FROM_ACL;
+
+	if (ctx->server_ino)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
+
+	if (ctx->remap)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SFM_CHR;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MAP_SFM_CHR;
+
+	if (ctx->sfu_remap)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MAP_SPECIAL_CHR;
+
+	if (ctx->no_xattr)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_XATTR;
+
+	if (ctx->sfu_emul)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_UNX_EMUL;
+
+	if (ctx->nobrl)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_BRL;
+
+	if (ctx->nohandlecache)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_HANDLE_CACHE;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_HANDLE_CACHE;
+
+	if (ctx->nostrictsync)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NOSSYNC;
+
+	if (ctx->mand_lock)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NOPOSIXBRL;
+
+	if (ctx->rwpidforward)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_RWPIDFORWARD;
+
+	if (ctx->mode_ace)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MODE_FROM_SID;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MODE_FROM_SID;
+
+	if (ctx->cifs_acl)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_ACL;
+
+	if (ctx->backupuid_specified)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_BACKUPUID;
+
+	if (ctx->backupgid_specified)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_BACKUPGID;
+
+	if (ctx->override_uid)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_OVERR_UID;
+
+	if (ctx->override_gid)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_OVERR_GID;
+
+	if (ctx->dynperm)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_DYNPERM;
+
+	if (ctx->fsc)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_FSCACHE;
+
+	if (ctx->multiuser)
+		cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
+					    CIFS_MOUNT_NO_PERM);
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MULTIUSER;
+
+
+	if (ctx->strict_io)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_STRICT_IO;
+
+	if (ctx->direct_io)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_DIRECT_IO;
+
+	if (ctx->mfsymlinks)
+		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
+	else
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MF_SYMLINKS;
+	if (ctx->mfsymlinks) {
+		if (ctx->sfu_emul) {
+			/*
+			 * Our SFU ("Services for Unix" emulation does not allow
+			 * creating symlinks but does allow reading existing SFU
+			 * symlinks (it does allow both creating and reading SFU
+			 * style mknod and FIFOs though). When "mfsymlinks" and
+			 * "sfu" are both enabled at the same time, it allows
+			 * reading both types of symlinks, but will only create
+			 * them with mfsymlinks format. This allows better
+			 * Apple compatibility (probably better for Samba too)
+			 * while still recognizing old Windows style symlinks.
+			 */
+			cifs_dbg(VFS, "mount options mfsymlinks and sfu both enabled\n");
+		}
+	}
+	cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SHUTDOWN;
+
+	return;
+}
diff --git a/fs/smb/client/fs_context.h b/fs/smb/client/fs_context.h
new file mode 100644
index 0000000000..cf46916286
--- /dev/null
+++ b/fs/smb/client/fs_context.h
@@ -0,0 +1,296 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ *   Copyright (C) 2020, Microsoft Corporation.
+ *
+ *   Author(s): Steve French <stfrench@microsoft.com>
+ *              David Howells <dhowells@redhat.com>
+ */
+
+#ifndef _FS_CONTEXT_H
+#define _FS_CONTEXT_H
+
+#include "cifsglob.h"
+#include <linux/parser.h>
+#include <linux/fs_parser.h>
+
+/* Log errors in fs_context (new mount api) but also in dmesg (old style) */
+#define cifs_errorf(fc, fmt, ...)			\
+	do {						\
+		errorf(fc, fmt, ## __VA_ARGS__);	\
+		cifs_dbg(VFS, fmt, ## __VA_ARGS__);	\
+	} while (0)
+
+enum smb_version {
+	Smb_1 = 1,
+	Smb_20,
+	Smb_21,
+	Smb_30,
+	Smb_302,
+	Smb_311,
+	Smb_3any,
+	Smb_default,
+	Smb_version_err
+};
+
+enum {
+	Opt_cache_loose,
+	Opt_cache_strict,
+	Opt_cache_none,
+	Opt_cache_ro,
+	Opt_cache_rw,
+	Opt_cache_err
+};
+
+enum cifs_sec_param {
+	Opt_sec_krb5,
+	Opt_sec_krb5i,
+	Opt_sec_krb5p,
+	Opt_sec_ntlmsspi,
+	Opt_sec_ntlmssp,
+	Opt_sec_ntlmv2,
+	Opt_sec_ntlmv2i,
+	Opt_sec_none,
+
+	Opt_sec_err
+};
+
+enum cifs_param {
+	/* Mount options that take no arguments */
+	Opt_user_xattr,
+	Opt_forceuid,
+	Opt_forcegid,
+	Opt_noblocksend,
+	Opt_noautotune,
+	Opt_nolease,
+	Opt_nosparse,
+	Opt_hard,
+	Opt_soft,
+	Opt_perm,
+	Opt_nodelete,
+	Opt_mapposix,
+	Opt_mapchars,
+	Opt_nomapchars,
+	Opt_sfu,
+	Opt_nodfs,
+	Opt_posixpaths,
+	Opt_unix,
+	Opt_nocase,
+	Opt_brl,
+	Opt_handlecache,
+	Opt_forcemandatorylock,
+	Opt_setuidfromacl,
+	Opt_setuids,
+	Opt_dynperm,
+	Opt_intr,
+	Opt_strictsync,
+	Opt_serverino,
+	Opt_rwpidforward,
+	Opt_cifsacl,
+	Opt_acl,
+	Opt_locallease,
+	Opt_sign,
+	Opt_ignore_signature,
+	Opt_seal,
+	Opt_noac,
+	Opt_fsc,
+	Opt_mfsymlinks,
+	Opt_multiuser,
+	Opt_sloppy,
+	Opt_nosharesock,
+	Opt_persistent,
+	Opt_resilient,
+	Opt_tcp_nodelay,
+	Opt_domainauto,
+	Opt_rdma,
+	Opt_modesid,
+	Opt_rootfs,
+	Opt_multichannel,
+	Opt_compress,
+	Opt_witness,
+
+	/* Mount options which take numeric value */
+	Opt_backupuid,
+	Opt_backupgid,
+	Opt_uid,
+	Opt_cruid,
+	Opt_gid,
+	Opt_port,
+	Opt_file_mode,
+	Opt_dirmode,
+	Opt_min_enc_offload,
+	Opt_blocksize,
+	Opt_rasize,
+	Opt_rsize,
+	Opt_wsize,
+	Opt_actimeo,
+	Opt_acdirmax,
+	Opt_acregmax,
+	Opt_closetimeo,
+	Opt_echo_interval,
+	Opt_max_credits,
+	Opt_max_cached_dirs,
+	Opt_snapshot,
+	Opt_max_channels,
+	Opt_handletimeout,
+
+	/* Mount options which take string value */
+	Opt_source,
+	Opt_user,
+	Opt_pass,
+	Opt_ip,
+	Opt_domain,
+	Opt_srcaddr,
+	Opt_iocharset,
+	Opt_netbiosname,
+	Opt_servern,
+	Opt_ver,
+	Opt_vers,
+	Opt_sec,
+	Opt_cache,
+
+	/* Mount options to be ignored */
+	Opt_ignore,
+
+	Opt_err
+};
+
+struct smb3_fs_context {
+	bool uid_specified;
+	bool cruid_specified;
+	bool gid_specified;
+	bool sloppy;
+	bool got_ip;
+	bool got_version;
+	bool got_rsize;
+	bool got_wsize;
+	bool got_bsize;
+	unsigned short port;
+
+	char *username;
+	char *password;
+	char *domainname;
+	char *source;
+	char *server_hostname;
+	char *UNC;
+	char *nodename;
+	char workstation_name[CIFS_MAX_WORKSTATION_LEN];
+	char *iocharset;  /* local code page for mapping to and from Unicode */
+	char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
+	char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
+	kuid_t cred_uid;
+	kuid_t linux_uid;
+	kgid_t linux_gid;
+	kuid_t backupuid;
+	kgid_t backupgid;
+	umode_t file_mode;
+	umode_t dir_mode;
+	enum securityEnum sectype; /* sectype requested via mnt opts */
+	bool sign; /* was signing requested via mnt opts? */
+	bool ignore_signature:1;
+	bool retry:1;
+	bool intr:1;
+	bool setuids:1;
+	bool setuidfromacl:1;
+	bool override_uid:1;
+	bool override_gid:1;
+	bool dynperm:1;
+	bool noperm:1;
+	bool nodelete:1;
+	bool mode_ace:1;
+	bool no_psx_acl:1; /* set if posix acl support should be disabled */
+	bool cifs_acl:1;
+	bool backupuid_specified; /* mount option  backupuid  is specified */
+	bool backupgid_specified; /* mount option  backupgid  is specified */
+	bool no_xattr:1;   /* set if xattr (EA) support should be disabled*/
+	bool server_ino:1; /* use inode numbers from server ie UniqueId */
+	bool direct_io:1;
+	bool strict_io:1; /* strict cache behavior */
+	bool cache_ro:1;
+	bool cache_rw:1;
+	bool remap:1;      /* set to remap seven reserved chars in filenames */
+	bool sfu_remap:1;  /* remap seven reserved chars ala SFU */
+	bool posix_paths:1; /* unset to not ask for posix pathnames. */
+	bool no_linux_ext:1;
+	bool linux_ext:1;
+	bool sfu_emul:1;
+	bool nullauth:1;   /* attempt to authenticate with null user */
+	bool nocase:1;     /* request case insensitive filenames */
+	bool nobrl:1;      /* disable sending byte range locks to srv */
+	bool nohandlecache:1; /* disable caching dir handles if srvr probs */
+	bool mand_lock:1;  /* send mandatory not posix byte range lock reqs */
+	bool seal:1;       /* request transport encryption on share */
+	bool nodfs:1;      /* Do not request DFS, even if available */
+	bool local_lease:1; /* check leases only on local system, not remote */
+	bool noblocksnd:1;
+	bool noautotune:1;
+	bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
+	bool no_lease:1;     /* disable requesting leases */
+	bool no_sparse:1;    /* do not attempt to set files sparse */
+	bool fsc:1;	/* enable fscache */
+	bool mfsymlinks:1; /* use Minshall+French Symlinks */
+	bool multiuser:1;
+	bool rwpidforward:1; /* pid forward for read/write operations */
+	bool nosharesock:1;
+	bool persistent:1;
+	bool nopersistent:1;
+	bool resilient:1; /* noresilient not required since not fored for CA */
+	bool domainauto:1;
+	bool rdma:1;
+	bool multichannel:1;
+	bool use_client_guid:1;
+	/* reuse existing guid for multichannel */
+	u8 client_guid[SMB2_CLIENT_GUID_SIZE];
+	unsigned int bsize;
+	unsigned int rasize;
+	unsigned int rsize;
+	unsigned int wsize;
+	unsigned int min_offload;
+	bool sockopt_tcp_nodelay:1;
+	/* attribute cache timemout for files and directories in jiffies */
+	unsigned long acregmax;
+	unsigned long acdirmax;
+	/* timeout for deferred close of files in jiffies */
+	unsigned long closetimeo;
+	struct smb_version_operations *ops;
+	struct smb_version_values *vals;
+	char *prepath;
+	struct sockaddr_storage dstaddr; /* destination address */
+	struct sockaddr_storage srcaddr; /* allow binding to a local IP */
+	struct nls_table *local_nls; /* This is a copy of the pointer in cifs_sb */
+	unsigned int echo_interval; /* echo interval in secs */
+	__u64 snapshot_time; /* needed for timewarp tokens */
+	__u32 handle_timeout; /* persistent and durable handle timeout in ms */
+	unsigned int max_credits; /* smb3 max_credits 10 < credits < 60000 */
+	unsigned int max_channels;
+	unsigned int max_cached_dirs;
+	__u16 compression; /* compression algorithm 0xFFFF default 0=disabled */
+	bool rootfs:1; /* if it's a SMB root file system */
+	bool witness:1; /* use witness protocol */
+	char *leaf_fullpath;
+	struct cifs_ses *dfs_root_ses;
+	bool dfs_automount:1; /* set for dfs automount only */
+};
+
+extern const struct fs_parameter_spec smb3_fs_parameters[];
+
+extern int smb3_init_fs_context(struct fs_context *fc);
+extern void smb3_cleanup_fs_context_contents(struct smb3_fs_context *ctx);
+extern void smb3_cleanup_fs_context(struct smb3_fs_context *ctx);
+
+static inline struct smb3_fs_context *smb3_fc2context(const struct fs_context *fc)
+{
+	return fc->fs_private;
+}
+
+extern int smb3_fs_context_dup(struct smb3_fs_context *new_ctx, struct smb3_fs_context *ctx);
+extern void smb3_update_mnt_flags(struct cifs_sb_info *cifs_sb);
+
+/*
+ * max deferred close timeout (jiffies) - 2^30
+ */
+#define SMB3_MAX_DCLOSETIMEO (1 << 30)
+#define SMB3_DEF_DCLOSETIMEO (1 * HZ) /* even 1 sec enough to help eg open/write/close/open/read */
+#define MAX_CACHED_FIDS 16
+extern char *cifs_sanitize_prepath(char *prepath, gfp_t gfp);
+
+#endif
diff --git a/fs/smb/client/fscache.c b/fs/smb/client/fscache.c
new file mode 100644
index 0000000000..e5cad149f5
--- /dev/null
+++ b/fs/smb/client/fscache.c
@@ -0,0 +1,247 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *   CIFS filesystem cache interface
+ *
+ *   Copyright (c) 2010 Novell, Inc.
+ *   Author(s): Suresh Jayaraman <sjayaraman@suse.de>
+ *
+ */
+#include "fscache.h"
+#include "cifsglob.h"
+#include "cifs_debug.h"
+#include "cifs_fs_sb.h"
+#include "cifsproto.h"
+
+static void cifs_fscache_fill_volume_coherency(
+	struct cifs_tcon *tcon,
+	struct cifs_fscache_volume_coherency_data *cd)
+{
+	memset(cd, 0, sizeof(*cd));
+	cd->resource_id		= cpu_to_le64(tcon->resource_id);
+	cd->vol_create_time	= tcon->vol_create_time;
+	cd->vol_serial_number	= cpu_to_le32(tcon->vol_serial_number);
+}
+
+int cifs_fscache_get_super_cookie(struct cifs_tcon *tcon)
+{
+	struct cifs_fscache_volume_coherency_data cd;
+	struct TCP_Server_Info *server = tcon->ses->server;
+	struct fscache_volume *vcookie;
+	const struct sockaddr *sa = (struct sockaddr *)&server->dstaddr;
+	size_t slen, i;
+	char *sharename;
+	char *key;
+	int ret = -ENOMEM;
+
+	tcon->fscache = NULL;
+	switch (sa->sa_family) {
+	case AF_INET:
+	case AF_INET6:
+		break;
+	default:
+		cifs_dbg(VFS, "Unknown network family '%d'\n", sa->sa_family);
+		return -EINVAL;
+	}
+
+	memset(&key, 0, sizeof(key));
+
+	sharename = extract_sharename(tcon->tree_name);
+	if (IS_ERR(sharename)) {
+		cifs_dbg(FYI, "%s: couldn't extract sharename\n", __func__);
+		return PTR_ERR(sharename);
+	}
+
+	slen = strlen(sharename);
+	for (i = 0; i < slen; i++)
+		if (sharename[i] == '/')
+			sharename[i] = ';';
+
+	key = kasprintf(GFP_KERNEL, "cifs,%pISpc,%s", sa, sharename);
+	if (!key)
+		goto out;
+
+	cifs_fscache_fill_volume_coherency(tcon, &cd);
+	vcookie = fscache_acquire_volume(key,
+					 NULL, /* preferred_cache */
+					 &cd, sizeof(cd));
+	cifs_dbg(FYI, "%s: (%s/0x%p)\n", __func__, key, vcookie);
+	if (IS_ERR(vcookie)) {
+		if (vcookie != ERR_PTR(-EBUSY)) {
+			ret = PTR_ERR(vcookie);
+			goto out_2;
+		}
+		pr_err("Cache volume key already in use (%s)\n", key);
+		vcookie = NULL;
+	}
+
+	tcon->fscache = vcookie;
+	ret = 0;
+out_2:
+	kfree(key);
+out:
+	kfree(sharename);
+	return ret;
+}
+
+void cifs_fscache_release_super_cookie(struct cifs_tcon *tcon)
+{
+	struct cifs_fscache_volume_coherency_data cd;
+
+	cifs_dbg(FYI, "%s: (0x%p)\n", __func__, tcon->fscache);
+
+	cifs_fscache_fill_volume_coherency(tcon, &cd);
+	fscache_relinquish_volume(tcon->fscache, &cd, false);
+	tcon->fscache = NULL;
+}
+
+void cifs_fscache_get_inode_cookie(struct inode *inode)
+{
+	struct cifs_fscache_inode_coherency_data cd;
+	struct cifsInodeInfo *cifsi = CIFS_I(inode);
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+
+	cifs_fscache_fill_coherency(&cifsi->netfs.inode, &cd);
+
+	cifsi->netfs.cache =
+		fscache_acquire_cookie(tcon->fscache, 0,
+				       &cifsi->uniqueid, sizeof(cifsi->uniqueid),
+				       &cd, sizeof(cd),
+				       i_size_read(&cifsi->netfs.inode));
+	if (cifsi->netfs.cache)
+		mapping_set_release_always(inode->i_mapping);
+}
+
+void cifs_fscache_unuse_inode_cookie(struct inode *inode, bool update)
+{
+	if (update) {
+		struct cifs_fscache_inode_coherency_data cd;
+		loff_t i_size = i_size_read(inode);
+
+		cifs_fscache_fill_coherency(inode, &cd);
+		fscache_unuse_cookie(cifs_inode_cookie(inode), &cd, &i_size);
+	} else {
+		fscache_unuse_cookie(cifs_inode_cookie(inode), NULL, NULL);
+	}
+}
+
+void cifs_fscache_release_inode_cookie(struct inode *inode)
+{
+	struct cifsInodeInfo *cifsi = CIFS_I(inode);
+	struct fscache_cookie *cookie = cifs_inode_cookie(inode);
+
+	if (cookie) {
+		cifs_dbg(FYI, "%s: (0x%p)\n", __func__, cookie);
+		fscache_relinquish_cookie(cookie, false);
+		cifsi->netfs.cache = NULL;
+	}
+}
+
+/*
+ * Fallback page reading interface.
+ */
+static int fscache_fallback_read_page(struct inode *inode, struct page *page)
+{
+	struct netfs_cache_resources cres;
+	struct fscache_cookie *cookie = cifs_inode_cookie(inode);
+	struct iov_iter iter;
+	struct bio_vec bvec;
+	int ret;
+
+	memset(&cres, 0, sizeof(cres));
+	bvec_set_page(&bvec, page, PAGE_SIZE, 0);
+	iov_iter_bvec(&iter, ITER_DEST, &bvec, 1, PAGE_SIZE);
+
+	ret = fscache_begin_read_operation(&cres, cookie);
+	if (ret < 0)
+		return ret;
+
+	ret = fscache_read(&cres, page_offset(page), &iter, NETFS_READ_HOLE_FAIL,
+			   NULL, NULL);
+	fscache_end_operation(&cres);
+	return ret;
+}
+
+/*
+ * Fallback page writing interface.
+ */
+static int fscache_fallback_write_pages(struct inode *inode, loff_t start, size_t len,
+					bool no_space_allocated_yet)
+{
+	struct netfs_cache_resources cres;
+	struct fscache_cookie *cookie = cifs_inode_cookie(inode);
+	struct iov_iter iter;
+	int ret;
+
+	memset(&cres, 0, sizeof(cres));
+	iov_iter_xarray(&iter, ITER_SOURCE, &inode->i_mapping->i_pages, start, len);
+
+	ret = fscache_begin_write_operation(&cres, cookie);
+	if (ret < 0)
+		return ret;
+
+	ret = cres.ops->prepare_write(&cres, &start, &len, i_size_read(inode),
+				      no_space_allocated_yet);
+	if (ret == 0)
+		ret = fscache_write(&cres, start, &iter, NULL, NULL);
+	fscache_end_operation(&cres);
+	return ret;
+}
+
+/*
+ * Retrieve a page from FS-Cache
+ */
+int __cifs_readpage_from_fscache(struct inode *inode, struct page *page)
+{
+	int ret;
+
+	cifs_dbg(FYI, "%s: (fsc:%p, p:%p, i:0x%p\n",
+		 __func__, cifs_inode_cookie(inode), page, inode);
+
+	ret = fscache_fallback_read_page(inode, page);
+	if (ret < 0)
+		return ret;
+
+	/* Read completed synchronously */
+	SetPageUptodate(page);
+	return 0;
+}
+
+void __cifs_readahead_to_fscache(struct inode *inode, loff_t pos, size_t len)
+{
+	cifs_dbg(FYI, "%s: (fsc: %p, p: %llx, l: %zx, i: %p)\n",
+		 __func__, cifs_inode_cookie(inode), pos, len, inode);
+
+	fscache_fallback_write_pages(inode, pos, len, true);
+}
+
+/*
+ * Query the cache occupancy.
+ */
+int __cifs_fscache_query_occupancy(struct inode *inode,
+				   pgoff_t first, unsigned int nr_pages,
+				   pgoff_t *_data_first,
+				   unsigned int *_data_nr_pages)
+{
+	struct netfs_cache_resources cres;
+	struct fscache_cookie *cookie = cifs_inode_cookie(inode);
+	loff_t start, data_start;
+	size_t len, data_len;
+	int ret;
+
+	ret = fscache_begin_read_operation(&cres, cookie);
+	if (ret < 0)
+		return ret;
+
+	start = first * PAGE_SIZE;
+	len = nr_pages * PAGE_SIZE;
+	ret = cres.ops->query_occupancy(&cres, start, len, PAGE_SIZE,
+					&data_start, &data_len);
+	if (ret == 0) {
+		*_data_first = data_start / PAGE_SIZE;
+		*_data_nr_pages = len / PAGE_SIZE;
+	}
+
+	fscache_end_operation(&cres);
+	return ret;
+}
diff --git a/fs/smb/client/fscache.h b/fs/smb/client/fscache.h
new file mode 100644
index 0000000000..a3d7372091
--- /dev/null
+++ b/fs/smb/client/fscache.h
@@ -0,0 +1,149 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+/*
+ *   CIFS filesystem cache interface definitions
+ *
+ *   Copyright (c) 2010 Novell, Inc.
+ *   Authors(s): Suresh Jayaraman (sjayaraman@suse.de>
+ *
+ */
+#ifndef _CIFS_FSCACHE_H
+#define _CIFS_FSCACHE_H
+
+#include <linux/swap.h>
+#include <linux/fscache.h>
+
+#include "cifsglob.h"
+
+/*
+ * Coherency data attached to CIFS volume within the cache
+ */
+struct cifs_fscache_volume_coherency_data {
+	__le64	resource_id;		/* unique server resource id */
+	__le64	vol_create_time;
+	__le32	vol_serial_number;
+} __packed;
+
+/*
+ * Coherency data attached to CIFS inode within the cache.
+ */
+struct cifs_fscache_inode_coherency_data {
+	__le64 last_write_time_sec;
+	__le64 last_change_time_sec;
+	__le32 last_write_time_nsec;
+	__le32 last_change_time_nsec;
+};
+
+#ifdef CONFIG_CIFS_FSCACHE
+
+/*
+ * fscache.c
+ */
+extern int cifs_fscache_get_super_cookie(struct cifs_tcon *);
+extern void cifs_fscache_release_super_cookie(struct cifs_tcon *);
+
+extern void cifs_fscache_get_inode_cookie(struct inode *inode);
+extern void cifs_fscache_release_inode_cookie(struct inode *);
+extern void cifs_fscache_unuse_inode_cookie(struct inode *inode, bool update);
+
+static inline
+void cifs_fscache_fill_coherency(struct inode *inode,
+				 struct cifs_fscache_inode_coherency_data *cd)
+{
+	struct timespec64 ctime = inode_get_ctime(inode);
+	struct timespec64 mtime = inode_get_mtime(inode);
+
+	memset(cd, 0, sizeof(*cd));
+	cd->last_write_time_sec   = cpu_to_le64(mtime.tv_sec);
+	cd->last_write_time_nsec  = cpu_to_le32(mtime.tv_nsec);
+	cd->last_change_time_sec  = cpu_to_le64(ctime.tv_sec);
+	cd->last_change_time_nsec = cpu_to_le32(ctime.tv_nsec);
+}
+
+
+static inline struct fscache_cookie *cifs_inode_cookie(struct inode *inode)
+{
+	return netfs_i_cookie(&CIFS_I(inode)->netfs);
+}
+
+static inline void cifs_invalidate_cache(struct inode *inode, unsigned int flags)
+{
+	struct cifs_fscache_inode_coherency_data cd;
+
+	cifs_fscache_fill_coherency(inode, &cd);
+	fscache_invalidate(cifs_inode_cookie(inode), &cd,
+			   i_size_read(inode), flags);
+}
+
+extern int __cifs_fscache_query_occupancy(struct inode *inode,
+					  pgoff_t first, unsigned int nr_pages,
+					  pgoff_t *_data_first,
+					  unsigned int *_data_nr_pages);
+
+static inline int cifs_fscache_query_occupancy(struct inode *inode,
+					       pgoff_t first, unsigned int nr_pages,
+					       pgoff_t *_data_first,
+					       unsigned int *_data_nr_pages)
+{
+	if (!cifs_inode_cookie(inode))
+		return -ENOBUFS;
+	return __cifs_fscache_query_occupancy(inode, first, nr_pages,
+					      _data_first, _data_nr_pages);
+}
+
+extern int __cifs_readpage_from_fscache(struct inode *pinode, struct page *ppage);
+extern void __cifs_readahead_to_fscache(struct inode *pinode, loff_t pos, size_t len);
+
+
+static inline int cifs_readpage_from_fscache(struct inode *inode,
+					     struct page *page)
+{
+	if (cifs_inode_cookie(inode))
+		return __cifs_readpage_from_fscache(inode, page);
+	return -ENOBUFS;
+}
+
+static inline void cifs_readahead_to_fscache(struct inode *inode,
+					     loff_t pos, size_t len)
+{
+	if (cifs_inode_cookie(inode))
+		__cifs_readahead_to_fscache(inode, pos, len);
+}
+
+#else /* CONFIG_CIFS_FSCACHE */
+static inline
+void cifs_fscache_fill_coherency(struct inode *inode,
+				 struct cifs_fscache_inode_coherency_data *cd)
+{
+}
+
+static inline int cifs_fscache_get_super_cookie(struct cifs_tcon *tcon) { return 0; }
+static inline void cifs_fscache_release_super_cookie(struct cifs_tcon *tcon) {}
+
+static inline void cifs_fscache_get_inode_cookie(struct inode *inode) {}
+static inline void cifs_fscache_release_inode_cookie(struct inode *inode) {}
+static inline void cifs_fscache_unuse_inode_cookie(struct inode *inode, bool update) {}
+static inline struct fscache_cookie *cifs_inode_cookie(struct inode *inode) { return NULL; }
+static inline void cifs_invalidate_cache(struct inode *inode, unsigned int flags) {}
+
+static inline int cifs_fscache_query_occupancy(struct inode *inode,
+					       pgoff_t first, unsigned int nr_pages,
+					       pgoff_t *_data_first,
+					       unsigned int *_data_nr_pages)
+{
+	*_data_first = ULONG_MAX;
+	*_data_nr_pages = 0;
+	return -ENOBUFS;
+}
+
+static inline int
+cifs_readpage_from_fscache(struct inode *inode, struct page *page)
+{
+	return -ENOBUFS;
+}
+
+static inline
+void cifs_readahead_to_fscache(struct inode *inode, loff_t pos, size_t len) {}
+
+#endif /* CONFIG_CIFS_FSCACHE */
+
+#endif /* _CIFS_FSCACHE_H */
diff --git a/fs/smb/client/inode.c b/fs/smb/client/inode.c
new file mode 100644
index 0000000000..09c5c0f5c9
--- /dev/null
+++ b/fs/smb/client/inode.c
@@ -0,0 +1,3219 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *
+ *   Copyright (C) International Business Machines  Corp., 2002,2010
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ */
+#include <linux/fs.h>
+#include <linux/stat.h>
+#include <linux/slab.h>
+#include <linux/pagemap.h>
+#include <linux/freezer.h>
+#include <linux/sched/signal.h>
+#include <linux/wait_bit.h>
+#include <linux/fiemap.h>
+#include <asm/div64.h>
+#include "cifsfs.h"
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "smb2proto.h"
+#include "cifs_debug.h"
+#include "cifs_fs_sb.h"
+#include "cifs_unicode.h"
+#include "fscache.h"
+#include "fs_context.h"
+#include "cifs_ioctl.h"
+#include "cached_dir.h"
+
+static void cifs_set_ops(struct inode *inode)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+
+	switch (inode->i_mode & S_IFMT) {
+	case S_IFREG:
+		inode->i_op = &cifs_file_inode_ops;
+		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
+			if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
+				inode->i_fop = &cifs_file_direct_nobrl_ops;
+			else
+				inode->i_fop = &cifs_file_direct_ops;
+		} else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) {
+			if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
+				inode->i_fop = &cifs_file_strict_nobrl_ops;
+			else
+				inode->i_fop = &cifs_file_strict_ops;
+		} else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
+			inode->i_fop = &cifs_file_nobrl_ops;
+		else { /* not direct, send byte range locks */
+			inode->i_fop = &cifs_file_ops;
+		}
+
+		/* check if server can support readahead */
+		if (cifs_sb_master_tcon(cifs_sb)->ses->server->max_read <
+				PAGE_SIZE + MAX_CIFS_HDR_SIZE)
+			inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
+		else
+			inode->i_data.a_ops = &cifs_addr_ops;
+		break;
+	case S_IFDIR:
+		if (IS_AUTOMOUNT(inode)) {
+			inode->i_op = &cifs_namespace_inode_operations;
+		} else {
+			inode->i_op = &cifs_dir_inode_ops;
+			inode->i_fop = &cifs_dir_ops;
+		}
+		break;
+	case S_IFLNK:
+		inode->i_op = &cifs_symlink_inode_ops;
+		break;
+	default:
+		init_special_inode(inode, inode->i_mode, inode->i_rdev);
+		break;
+	}
+}
+
+/* check inode attributes against fattr. If they don't match, tag the
+ * inode for cache invalidation
+ */
+static void
+cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr)
+{
+	struct cifs_fscache_inode_coherency_data cd;
+	struct cifsInodeInfo *cifs_i = CIFS_I(inode);
+	struct timespec64 mtime;
+
+	cifs_dbg(FYI, "%s: revalidating inode %llu\n",
+		 __func__, cifs_i->uniqueid);
+
+	if (inode->i_state & I_NEW) {
+		cifs_dbg(FYI, "%s: inode %llu is new\n",
+			 __func__, cifs_i->uniqueid);
+		return;
+	}
+
+	/* don't bother with revalidation if we have an oplock */
+	if (CIFS_CACHE_READ(cifs_i)) {
+		cifs_dbg(FYI, "%s: inode %llu is oplocked\n",
+			 __func__, cifs_i->uniqueid);
+		return;
+	}
+
+	 /* revalidate if mtime or size have changed */
+	fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode);
+	mtime = inode_get_mtime(inode);
+	if (timespec64_equal(&mtime, &fattr->cf_mtime) &&
+	    cifs_i->server_eof == fattr->cf_eof) {
+		cifs_dbg(FYI, "%s: inode %llu is unchanged\n",
+			 __func__, cifs_i->uniqueid);
+		return;
+	}
+
+	cifs_dbg(FYI, "%s: invalidating inode %llu mapping\n",
+		 __func__, cifs_i->uniqueid);
+	set_bit(CIFS_INO_INVALID_MAPPING, &cifs_i->flags);
+	/* Invalidate fscache cookie */
+	cifs_fscache_fill_coherency(&cifs_i->netfs.inode, &cd);
+	fscache_invalidate(cifs_inode_cookie(inode), &cd, i_size_read(inode), 0);
+}
+
+/*
+ * copy nlink to the inode, unless it wasn't provided.  Provide
+ * sane values if we don't have an existing one and none was provided
+ */
+static void
+cifs_nlink_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
+{
+	/*
+	 * if we're in a situation where we can't trust what we
+	 * got from the server (readdir, some non-unix cases)
+	 * fake reasonable values
+	 */
+	if (fattr->cf_flags & CIFS_FATTR_UNKNOWN_NLINK) {
+		/* only provide fake values on a new inode */
+		if (inode->i_state & I_NEW) {
+			if (fattr->cf_cifsattrs & ATTR_DIRECTORY)
+				set_nlink(inode, 2);
+			else
+				set_nlink(inode, 1);
+		}
+		return;
+	}
+
+	/* we trust the server, so update it */
+	set_nlink(inode, fattr->cf_nlink);
+}
+
+/* populate an inode with info from a cifs_fattr struct */
+int
+cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
+{
+	struct cifsInodeInfo *cifs_i = CIFS_I(inode);
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+
+	if (!(inode->i_state & I_NEW) &&
+	    unlikely(inode_wrong_type(inode, fattr->cf_mode))) {
+		CIFS_I(inode)->time = 0; /* force reval */
+		return -ESTALE;
+	}
+
+	cifs_revalidate_cache(inode, fattr);
+
+	spin_lock(&inode->i_lock);
+	fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode);
+	fattr->cf_atime = timestamp_truncate(fattr->cf_atime, inode);
+	fattr->cf_ctime = timestamp_truncate(fattr->cf_ctime, inode);
+	/* we do not want atime to be less than mtime, it broke some apps */
+	if (timespec64_compare(&fattr->cf_atime, &fattr->cf_mtime) < 0)
+		inode_set_atime_to_ts(inode, fattr->cf_mtime);
+	else
+		inode_set_atime_to_ts(inode, fattr->cf_atime);
+	inode_set_mtime_to_ts(inode, fattr->cf_mtime);
+	inode_set_ctime_to_ts(inode, fattr->cf_ctime);
+	inode->i_rdev = fattr->cf_rdev;
+	cifs_nlink_fattr_to_inode(inode, fattr);
+	inode->i_uid = fattr->cf_uid;
+	inode->i_gid = fattr->cf_gid;
+
+	/* if dynperm is set, don't clobber existing mode */
+	if (inode->i_state & I_NEW ||
+	    !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM))
+		inode->i_mode = fattr->cf_mode;
+
+	cifs_i->cifsAttrs = fattr->cf_cifsattrs;
+
+	if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL)
+		cifs_i->time = 0;
+	else
+		cifs_i->time = jiffies;
+
+	if (fattr->cf_flags & CIFS_FATTR_DELETE_PENDING)
+		set_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags);
+	else
+		clear_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags);
+
+	cifs_i->server_eof = fattr->cf_eof;
+	/*
+	 * Can't safely change the file size here if the client is writing to
+	 * it due to potential races.
+	 */
+	if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) {
+		i_size_write(inode, fattr->cf_eof);
+
+		/*
+		 * i_blocks is not related to (i_size / i_blksize),
+		 * but instead 512 byte (2**9) size is required for
+		 * calculating num blocks.
+		 */
+		inode->i_blocks = (512 - 1 + fattr->cf_bytes) >> 9;
+	}
+
+	if (S_ISLNK(fattr->cf_mode)) {
+		kfree(cifs_i->symlink_target);
+		cifs_i->symlink_target = fattr->cf_symlink_target;
+		fattr->cf_symlink_target = NULL;
+	}
+	spin_unlock(&inode->i_lock);
+
+	if (fattr->cf_flags & CIFS_FATTR_JUNCTION)
+		inode->i_flags |= S_AUTOMOUNT;
+	if (inode->i_state & I_NEW)
+		cifs_set_ops(inode);
+	return 0;
+}
+
+void
+cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
+		return;
+
+	fattr->cf_uniqueid = iunique(sb, ROOT_I);
+}
+
+/* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */
+void
+cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info,
+			 struct cifs_sb_info *cifs_sb)
+{
+	memset(fattr, 0, sizeof(*fattr));
+	fattr->cf_uniqueid = le64_to_cpu(info->UniqueId);
+	fattr->cf_bytes = le64_to_cpu(info->NumOfBytes);
+	fattr->cf_eof = le64_to_cpu(info->EndOfFile);
+
+	fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
+	fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime);
+	fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange);
+	/* old POSIX extensions don't get create time */
+
+	fattr->cf_mode = le64_to_cpu(info->Permissions);
+
+	/*
+	 * Since we set the inode type below we need to mask off
+	 * to avoid strange results if bits set above.
+	 */
+	fattr->cf_mode &= ~S_IFMT;
+	switch (le32_to_cpu(info->Type)) {
+	case UNIX_FILE:
+		fattr->cf_mode |= S_IFREG;
+		fattr->cf_dtype = DT_REG;
+		break;
+	case UNIX_SYMLINK:
+		fattr->cf_mode |= S_IFLNK;
+		fattr->cf_dtype = DT_LNK;
+		break;
+	case UNIX_DIR:
+		fattr->cf_mode |= S_IFDIR;
+		fattr->cf_dtype = DT_DIR;
+		break;
+	case UNIX_CHARDEV:
+		fattr->cf_mode |= S_IFCHR;
+		fattr->cf_dtype = DT_CHR;
+		fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
+				       le64_to_cpu(info->DevMinor) & MINORMASK);
+		break;
+	case UNIX_BLOCKDEV:
+		fattr->cf_mode |= S_IFBLK;
+		fattr->cf_dtype = DT_BLK;
+		fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
+				       le64_to_cpu(info->DevMinor) & MINORMASK);
+		break;
+	case UNIX_FIFO:
+		fattr->cf_mode |= S_IFIFO;
+		fattr->cf_dtype = DT_FIFO;
+		break;
+	case UNIX_SOCKET:
+		fattr->cf_mode |= S_IFSOCK;
+		fattr->cf_dtype = DT_SOCK;
+		break;
+	default:
+		/* safest to call it a file if we do not know */
+		fattr->cf_mode |= S_IFREG;
+		fattr->cf_dtype = DT_REG;
+		cifs_dbg(FYI, "unknown type %d\n", le32_to_cpu(info->Type));
+		break;
+	}
+
+	fattr->cf_uid = cifs_sb->ctx->linux_uid;
+	if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) {
+		u64 id = le64_to_cpu(info->Uid);
+		if (id < ((uid_t)-1)) {
+			kuid_t uid = make_kuid(&init_user_ns, id);
+			if (uid_valid(uid))
+				fattr->cf_uid = uid;
+		}
+	}
+	
+	fattr->cf_gid = cifs_sb->ctx->linux_gid;
+	if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) {
+		u64 id = le64_to_cpu(info->Gid);
+		if (id < ((gid_t)-1)) {
+			kgid_t gid = make_kgid(&init_user_ns, id);
+			if (gid_valid(gid))
+				fattr->cf_gid = gid;
+		}
+	}
+
+	fattr->cf_nlink = le64_to_cpu(info->Nlinks);
+}
+
+/*
+ * Fill a cifs_fattr struct with fake inode info.
+ *
+ * Needed to setup cifs_fattr data for the directory which is the
+ * junction to the new submount (ie to setup the fake directory
+ * which represents a DFS referral or reparse mount point).
+ */
+static void cifs_create_junction_fattr(struct cifs_fattr *fattr,
+				       struct super_block *sb)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+
+	cifs_dbg(FYI, "%s: creating fake fattr\n", __func__);
+
+	memset(fattr, 0, sizeof(*fattr));
+	fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU;
+	fattr->cf_uid = cifs_sb->ctx->linux_uid;
+	fattr->cf_gid = cifs_sb->ctx->linux_gid;
+	ktime_get_coarse_real_ts64(&fattr->cf_mtime);
+	fattr->cf_atime = fattr->cf_ctime = fattr->cf_mtime;
+	fattr->cf_nlink = 2;
+	fattr->cf_flags = CIFS_FATTR_JUNCTION;
+}
+
+/* Update inode with final fattr data */
+static int update_inode_info(struct super_block *sb,
+			     struct cifs_fattr *fattr,
+			     struct inode **inode)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	int rc = 0;
+
+	if (!*inode) {
+		*inode = cifs_iget(sb, fattr);
+		if (!*inode)
+			rc = -ENOMEM;
+		return rc;
+	}
+	/* We already have inode, update it.
+	 *
+	 * If file type or uniqueid is different, return error.
+	 */
+	if (unlikely((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) &&
+		     CIFS_I(*inode)->uniqueid != fattr->cf_uniqueid)) {
+		CIFS_I(*inode)->time = 0; /* force reval */
+		return -ESTALE;
+	}
+	return cifs_fattr_to_inode(*inode, fattr);
+}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+static int
+cifs_get_file_info_unix(struct file *filp)
+{
+	int rc;
+	unsigned int xid;
+	FILE_UNIX_BASIC_INFO find_data;
+	struct cifs_fattr fattr = {};
+	struct inode *inode = file_inode(filp);
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct cifsFileInfo *cfile = filp->private_data;
+	struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
+
+	xid = get_xid();
+
+	if (cfile->symlink_target) {
+		fattr.cf_symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
+		if (!fattr.cf_symlink_target) {
+			rc = -ENOMEM;
+			goto cifs_gfiunix_out;
+		}
+	}
+
+	rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->fid.netfid, &find_data);
+	if (!rc) {
+		cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb);
+	} else if (rc == -EREMOTE) {
+		cifs_create_junction_fattr(&fattr, inode->i_sb);
+		rc = 0;
+	} else
+		goto cifs_gfiunix_out;
+
+	rc = cifs_fattr_to_inode(inode, &fattr);
+
+cifs_gfiunix_out:
+	free_xid(xid);
+	return rc;
+}
+
+static int cifs_get_unix_fattr(const unsigned char *full_path,
+			       struct super_block *sb,
+			       struct cifs_fattr *fattr,
+			       struct inode **pinode,
+			       const unsigned int xid)
+{
+	struct TCP_Server_Info *server;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	FILE_UNIX_BASIC_INFO find_data;
+	struct cifs_tcon *tcon;
+	struct tcon_link *tlink;
+	int rc, tmprc;
+
+	cifs_dbg(FYI, "Getting info on %s\n", full_path);
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+	tcon = tlink_tcon(tlink);
+	server = tcon->ses->server;
+
+	/* could have done a find first instead but this returns more info */
+	rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data,
+				  cifs_sb->local_nls, cifs_remap(cifs_sb));
+	cifs_dbg(FYI, "%s: query path info: rc = %d\n", __func__, rc);
+	cifs_put_tlink(tlink);
+
+	if (!rc) {
+		cifs_unix_basic_to_fattr(fattr, &find_data, cifs_sb);
+	} else if (rc == -EREMOTE) {
+		cifs_create_junction_fattr(fattr, sb);
+		rc = 0;
+	} else {
+		return rc;
+	}
+
+	if (!*pinode)
+		cifs_fill_uniqueid(sb, fattr);
+
+	/* check for Minshall+French symlinks */
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
+		tmprc = check_mf_symlink(xid, tcon, cifs_sb, fattr, full_path);
+		cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
+	}
+
+	if (S_ISLNK(fattr->cf_mode) && !fattr->cf_symlink_target) {
+		if (!server->ops->query_symlink)
+			return -EOPNOTSUPP;
+		rc = server->ops->query_symlink(xid, tcon,
+						cifs_sb, full_path,
+						&fattr->cf_symlink_target);
+		cifs_dbg(FYI, "%s: query_symlink: %d\n", __func__, rc);
+	}
+	return rc;
+}
+
+int cifs_get_inode_info_unix(struct inode **pinode,
+			     const unsigned char *full_path,
+			     struct super_block *sb, unsigned int xid)
+{
+	struct cifs_fattr fattr = {};
+	int rc;
+
+	rc = cifs_get_unix_fattr(full_path, sb, &fattr, pinode, xid);
+	if (rc)
+		goto out;
+
+	rc = update_inode_info(sb, &fattr, pinode);
+out:
+	kfree(fattr.cf_symlink_target);
+	return rc;
+}
+#else
+static inline int cifs_get_unix_fattr(const unsigned char *full_path,
+				      struct super_block *sb,
+				      struct cifs_fattr *fattr,
+				      struct inode **pinode,
+				      const unsigned int xid)
+{
+	return -EOPNOTSUPP;
+}
+
+int cifs_get_inode_info_unix(struct inode **pinode,
+			     const unsigned char *full_path,
+			     struct super_block *sb, unsigned int xid)
+{
+	return -EOPNOTSUPP;
+}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+static int
+cifs_sfu_type(struct cifs_fattr *fattr, const char *path,
+	      struct cifs_sb_info *cifs_sb, unsigned int xid)
+{
+	int rc;
+	__u32 oplock;
+	struct tcon_link *tlink;
+	struct cifs_tcon *tcon;
+	struct cifs_fid fid;
+	struct cifs_open_parms oparms;
+	struct cifs_io_parms io_parms = {0};
+	char buf[24];
+	unsigned int bytes_read;
+	char *pbuf;
+	int buf_type = CIFS_NO_BUFFER;
+
+	pbuf = buf;
+
+	fattr->cf_mode &= ~S_IFMT;
+
+	if (fattr->cf_eof == 0) {
+		fattr->cf_mode |= S_IFIFO;
+		fattr->cf_dtype = DT_FIFO;
+		return 0;
+	} else if (fattr->cf_eof < 8) {
+		fattr->cf_mode |= S_IFREG;
+		fattr->cf_dtype = DT_REG;
+		return -EINVAL;	 /* EOPNOTSUPP? */
+	}
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+	tcon = tlink_tcon(tlink);
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.cifs_sb = cifs_sb,
+		.desired_access = GENERIC_READ,
+		.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR),
+		.disposition = FILE_OPEN,
+		.path = path,
+		.fid = &fid,
+	};
+
+	if (tcon->ses->server->oplocks)
+		oplock = REQ_OPLOCK;
+	else
+		oplock = 0;
+	rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, NULL);
+	if (rc) {
+		cifs_dbg(FYI, "check sfu type of %s, open rc = %d\n", path, rc);
+		cifs_put_tlink(tlink);
+		return rc;
+	}
+
+	/* Read header */
+	io_parms.netfid = fid.netfid;
+	io_parms.pid = current->tgid;
+	io_parms.tcon = tcon;
+	io_parms.offset = 0;
+	io_parms.length = 24;
+
+	rc = tcon->ses->server->ops->sync_read(xid, &fid, &io_parms,
+					&bytes_read, &pbuf, &buf_type);
+	if ((rc == 0) && (bytes_read >= 8)) {
+		if (memcmp("IntxBLK", pbuf, 8) == 0) {
+			cifs_dbg(FYI, "Block device\n");
+			fattr->cf_mode |= S_IFBLK;
+			fattr->cf_dtype = DT_BLK;
+			if (bytes_read == 24) {
+				/* we have enough to decode dev num */
+				__u64 mjr; /* major */
+				__u64 mnr; /* minor */
+				mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
+				mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
+				fattr->cf_rdev = MKDEV(mjr, mnr);
+			}
+		} else if (memcmp("IntxCHR", pbuf, 8) == 0) {
+			cifs_dbg(FYI, "Char device\n");
+			fattr->cf_mode |= S_IFCHR;
+			fattr->cf_dtype = DT_CHR;
+			if (bytes_read == 24) {
+				/* we have enough to decode dev num */
+				__u64 mjr; /* major */
+				__u64 mnr; /* minor */
+				mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
+				mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
+				fattr->cf_rdev = MKDEV(mjr, mnr);
+			}
+		} else if (memcmp("IntxLNK", pbuf, 7) == 0) {
+			cifs_dbg(FYI, "Symlink\n");
+			fattr->cf_mode |= S_IFLNK;
+			fattr->cf_dtype = DT_LNK;
+		} else if (memcmp("LnxFIFO", pbuf, 8) == 0) {
+			cifs_dbg(FYI, "FIFO\n");
+			fattr->cf_mode |= S_IFIFO;
+			fattr->cf_dtype = DT_FIFO;
+		} else {
+			fattr->cf_mode |= S_IFREG; /* file? */
+			fattr->cf_dtype = DT_REG;
+			rc = -EOPNOTSUPP;
+		}
+	} else {
+		fattr->cf_mode |= S_IFREG; /* then it is a file */
+		fattr->cf_dtype = DT_REG;
+		rc = -EOPNOTSUPP; /* or some unknown SFU type */
+	}
+
+	tcon->ses->server->ops->close(xid, tcon, &fid);
+	cifs_put_tlink(tlink);
+	return rc;
+}
+
+#define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID)  /* SETFILEBITS valid bits */
+
+/*
+ * Fetch mode bits as provided by SFU.
+ *
+ * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ?
+ */
+static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path,
+			 struct cifs_sb_info *cifs_sb, unsigned int xid)
+{
+#ifdef CONFIG_CIFS_XATTR
+	ssize_t rc;
+	char ea_value[4];
+	__u32 mode;
+	struct tcon_link *tlink;
+	struct cifs_tcon *tcon;
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+	tcon = tlink_tcon(tlink);
+
+	if (tcon->ses->server->ops->query_all_EAs == NULL) {
+		cifs_put_tlink(tlink);
+		return -EOPNOTSUPP;
+	}
+
+	rc = tcon->ses->server->ops->query_all_EAs(xid, tcon, path,
+			"SETFILEBITS", ea_value, 4 /* size of buf */,
+			cifs_sb);
+	cifs_put_tlink(tlink);
+	if (rc < 0)
+		return (int)rc;
+	else if (rc > 3) {
+		mode = le32_to_cpu(*((__le32 *)ea_value));
+		fattr->cf_mode &= ~SFBITS_MASK;
+		cifs_dbg(FYI, "special bits 0%o org mode 0%o\n",
+			 mode, fattr->cf_mode);
+		fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode;
+		cifs_dbg(FYI, "special mode bits 0%o\n", mode);
+	}
+
+	return 0;
+#else
+	return -EOPNOTSUPP;
+#endif
+}
+
+/* Fill a cifs_fattr struct with info from POSIX info struct */
+static void smb311_posix_info_to_fattr(struct cifs_fattr *fattr,
+				       struct cifs_open_info_data *data,
+				       struct cifs_sid *owner,
+				       struct cifs_sid *group,
+				       struct super_block *sb)
+{
+	struct smb311_posix_qinfo *info = &data->posix_fi;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+
+	memset(fattr, 0, sizeof(*fattr));
+
+	/* no fattr->flags to set */
+	fattr->cf_cifsattrs = le32_to_cpu(info->DosAttributes);
+	fattr->cf_uniqueid = le64_to_cpu(info->Inode);
+
+	if (info->LastAccessTime)
+		fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
+	else
+		ktime_get_coarse_real_ts64(&fattr->cf_atime);
+
+	fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
+	fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
+
+	if (data->adjust_tz) {
+		fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj;
+		fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj;
+	}
+
+	fattr->cf_eof = le64_to_cpu(info->EndOfFile);
+	fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
+	fattr->cf_createtime = le64_to_cpu(info->CreationTime);
+
+	fattr->cf_nlink = le32_to_cpu(info->HardLinks);
+	fattr->cf_mode = (umode_t) le32_to_cpu(info->Mode);
+	/* The srv fs device id is overridden on network mount so setting rdev isn't needed here */
+	/* fattr->cf_rdev = le32_to_cpu(info->DeviceId); */
+
+	if (data->symlink) {
+		fattr->cf_mode |= S_IFLNK;
+		fattr->cf_dtype = DT_LNK;
+		fattr->cf_symlink_target = data->symlink_target;
+		data->symlink_target = NULL;
+	} else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
+		fattr->cf_mode |= S_IFDIR;
+		fattr->cf_dtype = DT_DIR;
+	} else { /* file */
+		fattr->cf_mode |= S_IFREG;
+		fattr->cf_dtype = DT_REG;
+	}
+	/* else if reparse point ... TODO: add support for FIFO and blk dev; special file types */
+
+	sid_to_id(cifs_sb, owner, fattr, SIDOWNER);
+	sid_to_id(cifs_sb, group, fattr, SIDGROUP);
+
+	cifs_dbg(FYI, "POSIX query info: mode 0x%x uniqueid 0x%llx nlink %d\n",
+		fattr->cf_mode, fattr->cf_uniqueid, fattr->cf_nlink);
+}
+
+static inline dev_t nfs_mkdev(struct reparse_posix_data *buf)
+{
+	u64 v = le64_to_cpu(*(__le64 *)buf->DataBuffer);
+
+	return MKDEV(v >> 32, v & 0xffffffff);
+}
+
+bool cifs_reparse_point_to_fattr(struct cifs_sb_info *cifs_sb,
+				 struct cifs_fattr *fattr,
+				 struct cifs_open_info_data *data)
+{
+	struct reparse_posix_data *buf = data->reparse.posix;
+	u32 tag = data->reparse.tag;
+
+	if (tag == IO_REPARSE_TAG_NFS && buf) {
+		switch (le64_to_cpu(buf->InodeType)) {
+		case NFS_SPECFILE_CHR:
+			fattr->cf_mode |= S_IFCHR | cifs_sb->ctx->file_mode;
+			fattr->cf_dtype = DT_CHR;
+			fattr->cf_rdev = nfs_mkdev(buf);
+			break;
+		case NFS_SPECFILE_BLK:
+			fattr->cf_mode |= S_IFBLK | cifs_sb->ctx->file_mode;
+			fattr->cf_dtype = DT_BLK;
+			fattr->cf_rdev = nfs_mkdev(buf);
+			break;
+		case NFS_SPECFILE_FIFO:
+			fattr->cf_mode |= S_IFIFO | cifs_sb->ctx->file_mode;
+			fattr->cf_dtype = DT_FIFO;
+			break;
+		case NFS_SPECFILE_SOCK:
+			fattr->cf_mode |= S_IFSOCK | cifs_sb->ctx->file_mode;
+			fattr->cf_dtype = DT_SOCK;
+			break;
+		case NFS_SPECFILE_LNK:
+			fattr->cf_mode = S_IFLNK | cifs_sb->ctx->file_mode;
+			fattr->cf_dtype = DT_LNK;
+			break;
+		default:
+			WARN_ON_ONCE(1);
+			return false;
+		}
+		return true;
+	}
+
+	switch (tag) {
+	case IO_REPARSE_TAG_LX_SYMLINK:
+		fattr->cf_mode |= S_IFLNK | cifs_sb->ctx->file_mode;
+		fattr->cf_dtype = DT_LNK;
+		break;
+	case IO_REPARSE_TAG_LX_FIFO:
+		fattr->cf_mode |= S_IFIFO | cifs_sb->ctx->file_mode;
+		fattr->cf_dtype = DT_FIFO;
+		break;
+	case IO_REPARSE_TAG_AF_UNIX:
+		fattr->cf_mode |= S_IFSOCK | cifs_sb->ctx->file_mode;
+		fattr->cf_dtype = DT_SOCK;
+		break;
+	case IO_REPARSE_TAG_LX_CHR:
+		fattr->cf_mode |= S_IFCHR | cifs_sb->ctx->file_mode;
+		fattr->cf_dtype = DT_CHR;
+		break;
+	case IO_REPARSE_TAG_LX_BLK:
+		fattr->cf_mode |= S_IFBLK | cifs_sb->ctx->file_mode;
+		fattr->cf_dtype = DT_BLK;
+		break;
+	case 0: /* SMB1 symlink */
+	case IO_REPARSE_TAG_SYMLINK:
+	case IO_REPARSE_TAG_NFS:
+		fattr->cf_mode = S_IFLNK | cifs_sb->ctx->file_mode;
+		fattr->cf_dtype = DT_LNK;
+		break;
+	default:
+		return false;
+	}
+	return true;
+}
+
+static void cifs_open_info_to_fattr(struct cifs_fattr *fattr,
+				    struct cifs_open_info_data *data,
+				    struct super_block *sb)
+{
+	struct smb2_file_all_info *info = &data->fi;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+
+	memset(fattr, 0, sizeof(*fattr));
+	fattr->cf_cifsattrs = le32_to_cpu(info->Attributes);
+	if (info->DeletePending)
+		fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING;
+
+	if (info->LastAccessTime)
+		fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
+	else
+		ktime_get_coarse_real_ts64(&fattr->cf_atime);
+
+	fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
+	fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
+
+	if (data->adjust_tz) {
+		fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj;
+		fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj;
+	}
+
+	fattr->cf_eof = le64_to_cpu(info->EndOfFile);
+	fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
+	fattr->cf_createtime = le64_to_cpu(info->CreationTime);
+	fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks);
+
+	if (cifs_open_data_reparse(data) &&
+	    cifs_reparse_point_to_fattr(cifs_sb, fattr, data))
+		goto out_reparse;
+
+	if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
+		fattr->cf_mode = S_IFDIR | cifs_sb->ctx->dir_mode;
+		fattr->cf_dtype = DT_DIR;
+		/*
+		 * Server can return wrong NumberOfLinks value for directories
+		 * when Unix extensions are disabled - fake it.
+		 */
+		if (!tcon->unix_ext)
+			fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
+	} else {
+		fattr->cf_mode = S_IFREG | cifs_sb->ctx->file_mode;
+		fattr->cf_dtype = DT_REG;
+
+		/* clear write bits if ATTR_READONLY is set */
+		if (fattr->cf_cifsattrs & ATTR_READONLY)
+			fattr->cf_mode &= ~(S_IWUGO);
+
+		/*
+		 * Don't accept zero nlink from non-unix servers unless
+		 * delete is pending.  Instead mark it as unknown.
+		 */
+		if ((fattr->cf_nlink < 1) && !tcon->unix_ext &&
+		    !info->DeletePending) {
+			cifs_dbg(VFS, "bogus file nlink value %u\n",
+				 fattr->cf_nlink);
+			fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
+		}
+	}
+
+out_reparse:
+	if (S_ISLNK(fattr->cf_mode)) {
+		if (likely(data->symlink_target))
+			fattr->cf_eof = strnlen(data->symlink_target, PATH_MAX);
+		fattr->cf_symlink_target = data->symlink_target;
+		data->symlink_target = NULL;
+	}
+
+	fattr->cf_uid = cifs_sb->ctx->linux_uid;
+	fattr->cf_gid = cifs_sb->ctx->linux_gid;
+}
+
+static int
+cifs_get_file_info(struct file *filp)
+{
+	int rc;
+	unsigned int xid;
+	struct cifs_open_info_data data = {};
+	struct cifs_fattr fattr;
+	struct inode *inode = file_inode(filp);
+	struct cifsFileInfo *cfile = filp->private_data;
+	struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
+	struct TCP_Server_Info *server = tcon->ses->server;
+
+	if (!server->ops->query_file_info)
+		return -ENOSYS;
+
+	xid = get_xid();
+	rc = server->ops->query_file_info(xid, tcon, cfile, &data);
+	switch (rc) {
+	case 0:
+		/* TODO: add support to query reparse tag */
+		data.adjust_tz = false;
+		if (data.symlink_target) {
+			data.symlink = true;
+			data.reparse.tag = IO_REPARSE_TAG_SYMLINK;
+		}
+		cifs_open_info_to_fattr(&fattr, &data, inode->i_sb);
+		break;
+	case -EREMOTE:
+		cifs_create_junction_fattr(&fattr, inode->i_sb);
+		rc = 0;
+		break;
+	case -EOPNOTSUPP:
+	case -EINVAL:
+		/*
+		 * FIXME: legacy server -- fall back to path-based call?
+		 * for now, just skip revalidating and mark inode for
+		 * immediate reval.
+		 */
+		rc = 0;
+		CIFS_I(inode)->time = 0;
+		goto cgfi_exit;
+	default:
+		goto cgfi_exit;
+	}
+
+	/*
+	 * don't bother with SFU junk here -- just mark inode as needing
+	 * revalidation.
+	 */
+	fattr.cf_uniqueid = CIFS_I(inode)->uniqueid;
+	fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
+	/* if filetype is different, return error */
+	rc = cifs_fattr_to_inode(inode, &fattr);
+cgfi_exit:
+	cifs_free_open_info(&data);
+	free_xid(xid);
+	return rc;
+}
+
+/* Simple function to return a 64 bit hash of string.  Rarely called */
+static __u64 simple_hashstr(const char *str)
+{
+	const __u64 hash_mult =  1125899906842597ULL; /* a big enough prime */
+	__u64 hash = 0;
+
+	while (*str)
+		hash = (hash + (__u64) *str++) * hash_mult;
+
+	return hash;
+}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+/**
+ * cifs_backup_query_path_info - SMB1 fallback code to get ino
+ *
+ * Fallback code to get file metadata when we don't have access to
+ * full_path (EACCES) and have backup creds.
+ *
+ * @xid:	transaction id used to identify original request in logs
+ * @tcon:	information about the server share we have mounted
+ * @sb:	the superblock stores info such as disk space available
+ * @full_path:	name of the file we are getting the metadata for
+ * @resp_buf:	will be set to cifs resp buf and needs to be freed with
+ * 		cifs_buf_release() when done with @data
+ * @data:	will be set to search info result buffer
+ */
+static int
+cifs_backup_query_path_info(int xid,
+			    struct cifs_tcon *tcon,
+			    struct super_block *sb,
+			    const char *full_path,
+			    void **resp_buf,
+			    FILE_ALL_INFO **data)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	struct cifs_search_info info = {0};
+	u16 flags;
+	int rc;
+
+	*resp_buf = NULL;
+	info.endOfSearch = false;
+	if (tcon->unix_ext)
+		info.info_level = SMB_FIND_FILE_UNIX;
+	else if ((tcon->ses->capabilities &
+		  tcon->ses->server->vals->cap_nt_find) == 0)
+		info.info_level = SMB_FIND_FILE_INFO_STANDARD;
+	else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
+		info.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
+	else /* no srvino useful for fallback to some netapp */
+		info.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
+
+	flags = CIFS_SEARCH_CLOSE_ALWAYS |
+		CIFS_SEARCH_CLOSE_AT_END |
+		CIFS_SEARCH_BACKUP_SEARCH;
+
+	rc = CIFSFindFirst(xid, tcon, full_path,
+			   cifs_sb, NULL, flags, &info, false);
+	if (rc)
+		return rc;
+
+	*resp_buf = (void *)info.ntwrk_buf_start;
+	*data = (FILE_ALL_INFO *)info.srch_entries_start;
+	return 0;
+}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+static void cifs_set_fattr_ino(int xid, struct cifs_tcon *tcon, struct super_block *sb,
+			       struct inode **inode, const char *full_path,
+			       struct cifs_open_info_data *data, struct cifs_fattr *fattr)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	struct TCP_Server_Info *server = tcon->ses->server;
+	int rc;
+
+	if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
+		if (*inode)
+			fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
+		else
+			fattr->cf_uniqueid = iunique(sb, ROOT_I);
+		return;
+	}
+
+	/*
+	 * If we have an inode pass a NULL tcon to ensure we don't
+	 * make a round trip to the server. This only works for SMB2+.
+	 */
+	rc = server->ops->get_srv_inum(xid, *inode ? NULL : tcon, cifs_sb, full_path,
+				       &fattr->cf_uniqueid, data);
+	if (rc) {
+		/*
+		 * If that fails reuse existing ino or generate one
+		 * and disable server ones
+		 */
+		if (*inode)
+			fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
+		else {
+			fattr->cf_uniqueid = iunique(sb, ROOT_I);
+			cifs_autodisable_serverino(cifs_sb);
+		}
+		return;
+	}
+
+	/* If no errors, check for zero root inode (invalid) */
+	if (fattr->cf_uniqueid == 0 && strlen(full_path) == 0) {
+		cifs_dbg(FYI, "Invalid (0) inodenum\n");
+		if (*inode) {
+			/* reuse */
+			fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid;
+		} else {
+			/* make an ino by hashing the UNC */
+			fattr->cf_flags |= CIFS_FATTR_FAKE_ROOT_INO;
+			fattr->cf_uniqueid = simple_hashstr(tcon->tree_name);
+		}
+	}
+}
+
+static inline bool is_inode_cache_good(struct inode *ino)
+{
+	return ino && CIFS_CACHE_READ(CIFS_I(ino)) && CIFS_I(ino)->time != 0;
+}
+
+static int reparse_info_to_fattr(struct cifs_open_info_data *data,
+				 struct super_block *sb,
+				 const unsigned int xid,
+				 struct cifs_tcon *tcon,
+				 const char *full_path,
+				 struct cifs_fattr *fattr)
+{
+	struct TCP_Server_Info *server = tcon->ses->server;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	struct kvec rsp_iov, *iov = NULL;
+	int rsp_buftype = CIFS_NO_BUFFER;
+	u32 tag = data->reparse.tag;
+	int rc = 0;
+
+	if (!tag && server->ops->query_reparse_point) {
+		rc = server->ops->query_reparse_point(xid, tcon, cifs_sb,
+						      full_path, &tag,
+						      &rsp_iov, &rsp_buftype);
+		if (!rc)
+			iov = &rsp_iov;
+	}
+
+	rc = -EOPNOTSUPP;
+	switch ((data->reparse.tag = tag)) {
+	case 0: /* SMB1 symlink */
+		if (server->ops->query_symlink) {
+			rc = server->ops->query_symlink(xid, tcon,
+							cifs_sb, full_path,
+							&data->symlink_target);
+		}
+		break;
+	case IO_REPARSE_TAG_MOUNT_POINT:
+		cifs_create_junction_fattr(fattr, sb);
+		rc = 0;
+		goto out;
+	default:
+		if (data->symlink_target) {
+			rc = 0;
+		} else if (server->ops->parse_reparse_point) {
+			rc = server->ops->parse_reparse_point(cifs_sb,
+							      iov, data);
+		}
+		break;
+	}
+
+	cifs_open_info_to_fattr(fattr, data, sb);
+out:
+	free_rsp_buf(rsp_buftype, rsp_iov.iov_base);
+	return rc;
+}
+
+static int cifs_get_fattr(struct cifs_open_info_data *data,
+			  struct super_block *sb, int xid,
+			  const struct cifs_fid *fid,
+			  struct cifs_fattr *fattr,
+			  struct inode **inode,
+			  const char *full_path)
+{
+	struct cifs_open_info_data tmp_data = {};
+	struct cifs_tcon *tcon;
+	struct TCP_Server_Info *server;
+	struct tcon_link *tlink;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	void *smb1_backup_rsp_buf = NULL;
+	int rc = 0;
+	int tmprc = 0;
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+	tcon = tlink_tcon(tlink);
+	server = tcon->ses->server;
+
+	/*
+	 * 1. Fetch file metadata if not provided (data)
+	 */
+
+	if (!data) {
+		rc = server->ops->query_path_info(xid, tcon, cifs_sb,
+						  full_path, &tmp_data);
+		data = &tmp_data;
+	}
+
+	/*
+	 * 2. Convert it to internal cifs metadata (fattr)
+	 */
+
+	switch (rc) {
+	case 0:
+		/*
+		 * If the file is a reparse point, it is more complicated
+		 * since we have to check if its reparse tag matches a known
+		 * special file type e.g. symlink or fifo or char etc.
+		 */
+		if (cifs_open_data_reparse(data)) {
+			rc = reparse_info_to_fattr(data, sb, xid, tcon,
+						   full_path, fattr);
+		} else {
+			cifs_open_info_to_fattr(fattr, data, sb);
+		}
+		break;
+	case -EREMOTE:
+		/* DFS link, no metadata available on this server */
+		cifs_create_junction_fattr(fattr, sb);
+		rc = 0;
+		break;
+	case -EACCES:
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+		/*
+		 * perm errors, try again with backup flags if possible
+		 *
+		 * For SMB2 and later the backup intent flag
+		 * is already sent if needed on open and there
+		 * is no path based FindFirst operation to use
+		 * to retry with
+		 */
+		if (backup_cred(cifs_sb) && is_smb1_server(server)) {
+			/* for easier reading */
+			FILE_ALL_INFO *fi;
+			FILE_DIRECTORY_INFO *fdi;
+			SEARCH_ID_FULL_DIR_INFO *si;
+
+			rc = cifs_backup_query_path_info(xid, tcon, sb,
+							 full_path,
+							 &smb1_backup_rsp_buf,
+							 &fi);
+			if (rc)
+				goto out;
+
+			move_cifs_info_to_smb2(&data->fi, fi);
+			fdi = (FILE_DIRECTORY_INFO *)fi;
+			si = (SEARCH_ID_FULL_DIR_INFO *)fi;
+
+			cifs_dir_info_to_fattr(fattr, fdi, cifs_sb);
+			fattr->cf_uniqueid = le64_to_cpu(si->UniqueId);
+			/* uniqueid set, skip get inum step */
+			goto handle_mnt_opt;
+		} else {
+			/* nothing we can do, bail out */
+			goto out;
+		}
+#else
+		goto out;
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+		break;
+	default:
+		cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc);
+		goto out;
+	}
+
+	/*
+	 * 3. Get or update inode number (fattr->cf_uniqueid)
+	 */
+
+	cifs_set_fattr_ino(xid, tcon, sb, inode, full_path, data, fattr);
+
+	/*
+	 * 4. Tweak fattr based on mount options
+	 */
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+handle_mnt_opt:
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+	/* query for SFU type info if supported and needed */
+	if ((fattr->cf_cifsattrs & ATTR_SYSTEM) &&
+	    (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) {
+		tmprc = cifs_sfu_type(fattr, full_path, cifs_sb, xid);
+		if (tmprc)
+			cifs_dbg(FYI, "cifs_sfu_type failed: %d\n", tmprc);
+	}
+
+	/* fill in 0777 bits from ACL */
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) {
+		rc = cifs_acl_to_fattr(cifs_sb, fattr, *inode,
+				       true, full_path, fid);
+		if (rc == -EREMOTE)
+			rc = 0;
+		if (rc) {
+			cifs_dbg(FYI, "%s: Get mode from SID failed. rc=%d\n",
+				 __func__, rc);
+			goto out;
+		}
+	} else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
+		rc = cifs_acl_to_fattr(cifs_sb, fattr, *inode,
+				       false, full_path, fid);
+		if (rc == -EREMOTE)
+			rc = 0;
+		if (rc) {
+			cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n",
+				 __func__, rc);
+			goto out;
+		}
+	}
+
+	/* fill in remaining high mode bits e.g. SUID, VTX */
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
+		cifs_sfu_mode(fattr, full_path, cifs_sb, xid);
+
+	/* check for Minshall+French symlinks */
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
+		tmprc = check_mf_symlink(xid, tcon, cifs_sb, fattr, full_path);
+		cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
+	}
+
+out:
+	cifs_buf_release(smb1_backup_rsp_buf);
+	cifs_put_tlink(tlink);
+	cifs_free_open_info(&tmp_data);
+	return rc;
+}
+
+int cifs_get_inode_info(struct inode **inode,
+			const char *full_path,
+			struct cifs_open_info_data *data,
+			struct super_block *sb, int xid,
+			const struct cifs_fid *fid)
+{
+	struct cifs_fattr fattr = {};
+	int rc;
+
+	if (is_inode_cache_good(*inode)) {
+		cifs_dbg(FYI, "No need to revalidate cached inode sizes\n");
+		return 0;
+	}
+
+	rc = cifs_get_fattr(data, sb, xid, fid, &fattr, inode, full_path);
+	if (rc)
+		goto out;
+
+	rc = update_inode_info(sb, &fattr, inode);
+out:
+	kfree(fattr.cf_symlink_target);
+	return rc;
+}
+
+static int smb311_posix_get_fattr(struct cifs_fattr *fattr,
+				  const char *full_path,
+				  struct super_block *sb,
+				  const unsigned int xid)
+{
+	struct cifs_open_info_data data = {};
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	struct cifs_tcon *tcon;
+	struct tcon_link *tlink;
+	struct cifs_sid owner, group;
+	int tmprc;
+	int rc;
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+	tcon = tlink_tcon(tlink);
+
+	/*
+	 * 1. Fetch file metadata
+	 */
+
+	rc = smb311_posix_query_path_info(xid, tcon, cifs_sb,
+					  full_path, &data,
+					  &owner, &group);
+
+	/*
+	 * 2. Convert it to internal cifs metadata (fattr)
+	 */
+
+	switch (rc) {
+	case 0:
+		smb311_posix_info_to_fattr(fattr, &data, &owner, &group, sb);
+		break;
+	case -EREMOTE:
+		/* DFS link, no metadata available on this server */
+		cifs_create_junction_fattr(fattr, sb);
+		rc = 0;
+		break;
+	case -EACCES:
+		/*
+		 * For SMB2 and later the backup intent flag
+		 * is already sent if needed on open and there
+		 * is no path based FindFirst operation to use
+		 * to retry with so nothing we can do, bail out
+		 */
+		goto out;
+	default:
+		cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc);
+		goto out;
+	}
+
+	/*
+	 * 3. Tweak fattr based on mount options
+	 */
+	/* check for Minshall+French symlinks */
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
+		tmprc = check_mf_symlink(xid, tcon, cifs_sb, fattr, full_path);
+		cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc);
+	}
+
+out:
+	cifs_put_tlink(tlink);
+	cifs_free_open_info(&data);
+	return rc;
+}
+
+int smb311_posix_get_inode_info(struct inode **inode, const char *full_path,
+				struct super_block *sb, const unsigned int xid)
+{
+	struct cifs_fattr fattr = {};
+	int rc;
+
+	if (is_inode_cache_good(*inode)) {
+		cifs_dbg(FYI, "No need to revalidate cached inode sizes\n");
+		return 0;
+	}
+
+	rc = smb311_posix_get_fattr(&fattr, full_path, sb, xid);
+	if (rc)
+		goto out;
+
+	rc = update_inode_info(sb, &fattr, inode);
+out:
+	kfree(fattr.cf_symlink_target);
+	return rc;
+}
+
+static const struct inode_operations cifs_ipc_inode_ops = {
+	.lookup = cifs_lookup,
+};
+
+static int
+cifs_find_inode(struct inode *inode, void *opaque)
+{
+	struct cifs_fattr *fattr = opaque;
+
+	/* don't match inode with different uniqueid */
+	if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid)
+		return 0;
+
+	/* use createtime like an i_generation field */
+	if (CIFS_I(inode)->createtime != fattr->cf_createtime)
+		return 0;
+
+	/* don't match inode of different type */
+	if (inode_wrong_type(inode, fattr->cf_mode))
+		return 0;
+
+	/* if it's not a directory or has no dentries, then flag it */
+	if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry))
+		fattr->cf_flags |= CIFS_FATTR_INO_COLLISION;
+
+	return 1;
+}
+
+static int
+cifs_init_inode(struct inode *inode, void *opaque)
+{
+	struct cifs_fattr *fattr = opaque;
+
+	CIFS_I(inode)->uniqueid = fattr->cf_uniqueid;
+	CIFS_I(inode)->createtime = fattr->cf_createtime;
+	return 0;
+}
+
+/*
+ * walk dentry list for an inode and report whether it has aliases that
+ * are hashed. We use this to determine if a directory inode can actually
+ * be used.
+ */
+static bool
+inode_has_hashed_dentries(struct inode *inode)
+{
+	struct dentry *dentry;
+
+	spin_lock(&inode->i_lock);
+	hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) {
+		if (!d_unhashed(dentry) || IS_ROOT(dentry)) {
+			spin_unlock(&inode->i_lock);
+			return true;
+		}
+	}
+	spin_unlock(&inode->i_lock);
+	return false;
+}
+
+/* Given fattrs, get a corresponding inode */
+struct inode *
+cifs_iget(struct super_block *sb, struct cifs_fattr *fattr)
+{
+	unsigned long hash;
+	struct inode *inode;
+
+retry_iget5_locked:
+	cifs_dbg(FYI, "looking for uniqueid=%llu\n", fattr->cf_uniqueid);
+
+	/* hash down to 32-bits on 32-bit arch */
+	hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid);
+
+	inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr);
+	if (inode) {
+		/* was there a potentially problematic inode collision? */
+		if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) {
+			fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION;
+
+			if (inode_has_hashed_dentries(inode)) {
+				cifs_autodisable_serverino(CIFS_SB(sb));
+				iput(inode);
+				fattr->cf_uniqueid = iunique(sb, ROOT_I);
+				goto retry_iget5_locked;
+			}
+		}
+
+		/* can't fail - see cifs_find_inode() */
+		cifs_fattr_to_inode(inode, fattr);
+		if (sb->s_flags & SB_NOATIME)
+			inode->i_flags |= S_NOATIME | S_NOCMTIME;
+		if (inode->i_state & I_NEW) {
+			inode->i_ino = hash;
+			cifs_fscache_get_inode_cookie(inode);
+			unlock_new_inode(inode);
+		}
+	}
+
+	return inode;
+}
+
+/* gets root inode */
+struct inode *cifs_root_iget(struct super_block *sb)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	struct cifs_fattr fattr = {};
+	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+	struct inode *inode = NULL;
+	unsigned int xid;
+	char *path = NULL;
+	int len;
+	int rc;
+
+	if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
+	    && cifs_sb->prepath) {
+		len = strlen(cifs_sb->prepath);
+		path = kzalloc(len + 2 /* leading sep + null */, GFP_KERNEL);
+		if (path == NULL)
+			return ERR_PTR(-ENOMEM);
+		path[0] = '/';
+		memcpy(path+1, cifs_sb->prepath, len);
+	} else {
+		path = kstrdup("", GFP_KERNEL);
+		if (path == NULL)
+			return ERR_PTR(-ENOMEM);
+	}
+
+	xid = get_xid();
+	if (tcon->unix_ext) {
+		rc = cifs_get_unix_fattr(path, sb, &fattr, &inode, xid);
+		/* some servers mistakenly claim POSIX support */
+		if (rc != -EOPNOTSUPP)
+			goto iget_root;
+		cifs_dbg(VFS, "server does not support POSIX extensions\n");
+		tcon->unix_ext = false;
+	}
+
+	convert_delimiter(path, CIFS_DIR_SEP(cifs_sb));
+	if (tcon->posix_extensions)
+		rc = smb311_posix_get_fattr(&fattr, path, sb, xid);
+	else
+		rc = cifs_get_fattr(NULL, sb, xid, NULL, &fattr, &inode, path);
+
+iget_root:
+	if (!rc) {
+		if (fattr.cf_flags & CIFS_FATTR_JUNCTION) {
+			fattr.cf_flags &= ~CIFS_FATTR_JUNCTION;
+			cifs_autodisable_serverino(cifs_sb);
+		}
+		inode = cifs_iget(sb, &fattr);
+	}
+
+	if (!inode) {
+		inode = ERR_PTR(rc);
+		goto out;
+	}
+
+	if (rc && tcon->pipe) {
+		cifs_dbg(FYI, "ipc connection - fake read inode\n");
+		spin_lock(&inode->i_lock);
+		inode->i_mode |= S_IFDIR;
+		set_nlink(inode, 2);
+		inode->i_op = &cifs_ipc_inode_ops;
+		inode->i_fop = &simple_dir_operations;
+		inode->i_uid = cifs_sb->ctx->linux_uid;
+		inode->i_gid = cifs_sb->ctx->linux_gid;
+		spin_unlock(&inode->i_lock);
+	} else if (rc) {
+		iget_failed(inode);
+		inode = ERR_PTR(rc);
+	}
+
+out:
+	kfree(path);
+	free_xid(xid);
+	kfree(fattr.cf_symlink_target);
+	return inode;
+}
+
+int
+cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid,
+		   const char *full_path, __u32 dosattr)
+{
+	bool set_time = false;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct TCP_Server_Info *server;
+	FILE_BASIC_INFO	info_buf;
+
+	if (attrs == NULL)
+		return -EINVAL;
+
+	server = cifs_sb_master_tcon(cifs_sb)->ses->server;
+	if (!server->ops->set_file_info)
+		return -ENOSYS;
+
+	info_buf.Pad = 0;
+
+	if (attrs->ia_valid & ATTR_ATIME) {
+		set_time = true;
+		info_buf.LastAccessTime =
+			cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
+	} else
+		info_buf.LastAccessTime = 0;
+
+	if (attrs->ia_valid & ATTR_MTIME) {
+		set_time = true;
+		info_buf.LastWriteTime =
+		    cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
+	} else
+		info_buf.LastWriteTime = 0;
+
+	/*
+	 * Samba throws this field away, but windows may actually use it.
+	 * Do not set ctime unless other time stamps are changed explicitly
+	 * (i.e. by utimes()) since we would then have a mix of client and
+	 * server times.
+	 */
+	if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
+		cifs_dbg(FYI, "CIFS - CTIME changed\n");
+		info_buf.ChangeTime =
+		    cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
+	} else
+		info_buf.ChangeTime = 0;
+
+	info_buf.CreationTime = 0;	/* don't change */
+	info_buf.Attributes = cpu_to_le32(dosattr);
+
+	return server->ops->set_file_info(inode, full_path, &info_buf, xid);
+}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+/*
+ * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit
+ * and rename it to a random name that hopefully won't conflict with
+ * anything else.
+ */
+int
+cifs_rename_pending_delete(const char *full_path, struct dentry *dentry,
+			   const unsigned int xid)
+{
+	int oplock = 0;
+	int rc;
+	struct cifs_fid fid;
+	struct cifs_open_parms oparms;
+	struct inode *inode = d_inode(dentry);
+	struct cifsInodeInfo *cifsInode = CIFS_I(inode);
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct tcon_link *tlink;
+	struct cifs_tcon *tcon;
+	__u32 dosattr, origattr;
+	FILE_BASIC_INFO *info_buf = NULL;
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+	tcon = tlink_tcon(tlink);
+
+	/*
+	 * We cannot rename the file if the server doesn't support
+	 * CAP_INFOLEVEL_PASSTHRU
+	 */
+	if (!(tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)) {
+		rc = -EBUSY;
+		goto out;
+	}
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.cifs_sb = cifs_sb,
+		.desired_access = DELETE | FILE_WRITE_ATTRIBUTES,
+		.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR),
+		.disposition = FILE_OPEN,
+		.path = full_path,
+		.fid = &fid,
+	};
+
+	rc = CIFS_open(xid, &oparms, &oplock, NULL);
+	if (rc != 0)
+		goto out;
+
+	origattr = cifsInode->cifsAttrs;
+	if (origattr == 0)
+		origattr |= ATTR_NORMAL;
+
+	dosattr = origattr & ~ATTR_READONLY;
+	if (dosattr == 0)
+		dosattr |= ATTR_NORMAL;
+	dosattr |= ATTR_HIDDEN;
+
+	/* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */
+	if (dosattr != origattr) {
+		info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
+		if (info_buf == NULL) {
+			rc = -ENOMEM;
+			goto out_close;
+		}
+		info_buf->Attributes = cpu_to_le32(dosattr);
+		rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
+					current->tgid);
+		/* although we would like to mark the file hidden
+ 		   if that fails we will still try to rename it */
+		if (!rc)
+			cifsInode->cifsAttrs = dosattr;
+		else
+			dosattr = origattr; /* since not able to change them */
+	}
+
+	/* rename the file */
+	rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, NULL,
+				   cifs_sb->local_nls,
+				   cifs_remap(cifs_sb));
+	if (rc != 0) {
+		rc = -EBUSY;
+		goto undo_setattr;
+	}
+
+	/* try to set DELETE_ON_CLOSE */
+	if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) {
+		rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid,
+					       current->tgid);
+		/*
+		 * some samba versions return -ENOENT when we try to set the
+		 * file disposition here. Likely a samba bug, but work around
+		 * it for now. This means that some cifsXXX files may hang
+		 * around after they shouldn't.
+		 *
+		 * BB: remove this hack after more servers have the fix
+		 */
+		if (rc == -ENOENT)
+			rc = 0;
+		else if (rc != 0) {
+			rc = -EBUSY;
+			goto undo_rename;
+		}
+		set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags);
+	}
+
+out_close:
+	CIFSSMBClose(xid, tcon, fid.netfid);
+out:
+	kfree(info_buf);
+	cifs_put_tlink(tlink);
+	return rc;
+
+	/*
+	 * reset everything back to the original state. Don't bother
+	 * dealing with errors here since we can't do anything about
+	 * them anyway.
+	 */
+undo_rename:
+	CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, dentry->d_name.name,
+				cifs_sb->local_nls, cifs_remap(cifs_sb));
+undo_setattr:
+	if (dosattr != origattr) {
+		info_buf->Attributes = cpu_to_le32(origattr);
+		if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid,
+					current->tgid))
+			cifsInode->cifsAttrs = origattr;
+	}
+
+	goto out_close;
+}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+/* copied from fs/nfs/dir.c with small changes */
+static void
+cifs_drop_nlink(struct inode *inode)
+{
+	spin_lock(&inode->i_lock);
+	if (inode->i_nlink > 0)
+		drop_nlink(inode);
+	spin_unlock(&inode->i_lock);
+}
+
+/*
+ * If d_inode(dentry) is null (usually meaning the cached dentry
+ * is a negative dentry) then we would attempt a standard SMB delete, but
+ * if that fails we can not attempt the fall back mechanisms on EACCES
+ * but will return the EACCES to the caller. Note that the VFS does not call
+ * unlink on negative dentries currently.
+ */
+int cifs_unlink(struct inode *dir, struct dentry *dentry)
+{
+	int rc = 0;
+	unsigned int xid;
+	const char *full_path;
+	void *page;
+	struct inode *inode = d_inode(dentry);
+	struct cifsInodeInfo *cifs_inode;
+	struct super_block *sb = dir->i_sb;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	struct tcon_link *tlink;
+	struct cifs_tcon *tcon;
+	struct TCP_Server_Info *server;
+	struct iattr *attrs = NULL;
+	__u32 dosattr = 0, origattr = 0;
+
+	cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry);
+
+	if (unlikely(cifs_forced_shutdown(cifs_sb)))
+		return -EIO;
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+	tcon = tlink_tcon(tlink);
+	server = tcon->ses->server;
+
+	xid = get_xid();
+	page = alloc_dentry_path();
+
+	if (tcon->nodelete) {
+		rc = -EACCES;
+		goto unlink_out;
+	}
+
+	/* Unlink can be called from rename so we can not take the
+	 * sb->s_vfs_rename_mutex here */
+	full_path = build_path_from_dentry(dentry, page);
+	if (IS_ERR(full_path)) {
+		rc = PTR_ERR(full_path);
+		goto unlink_out;
+	}
+
+	cifs_close_deferred_file_under_dentry(tcon, full_path);
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
+				le64_to_cpu(tcon->fsUnixInfo.Capability))) {
+		rc = CIFSPOSIXDelFile(xid, tcon, full_path,
+			SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
+			cifs_remap(cifs_sb));
+		cifs_dbg(FYI, "posix del rc %d\n", rc);
+		if ((rc == 0) || (rc == -ENOENT))
+			goto psx_del_no_retry;
+	}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+retry_std_delete:
+	if (!server->ops->unlink) {
+		rc = -ENOSYS;
+		goto psx_del_no_retry;
+	}
+
+	rc = server->ops->unlink(xid, tcon, full_path, cifs_sb);
+
+psx_del_no_retry:
+	if (!rc) {
+		if (inode)
+			cifs_drop_nlink(inode);
+	} else if (rc == -ENOENT) {
+		d_drop(dentry);
+	} else if (rc == -EBUSY) {
+		if (server->ops->rename_pending_delete) {
+			rc = server->ops->rename_pending_delete(full_path,
+								dentry, xid);
+			if (rc == 0)
+				cifs_drop_nlink(inode);
+		}
+	} else if ((rc == -EACCES) && (dosattr == 0) && inode) {
+		attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
+		if (attrs == NULL) {
+			rc = -ENOMEM;
+			goto out_reval;
+		}
+
+		/* try to reset dos attributes */
+		cifs_inode = CIFS_I(inode);
+		origattr = cifs_inode->cifsAttrs;
+		if (origattr == 0)
+			origattr |= ATTR_NORMAL;
+		dosattr = origattr & ~ATTR_READONLY;
+		if (dosattr == 0)
+			dosattr |= ATTR_NORMAL;
+		dosattr |= ATTR_HIDDEN;
+
+		rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
+		if (rc != 0)
+			goto out_reval;
+
+		goto retry_std_delete;
+	}
+
+	/* undo the setattr if we errored out and it's needed */
+	if (rc != 0 && dosattr != 0)
+		cifs_set_file_info(inode, attrs, xid, full_path, origattr);
+
+out_reval:
+	if (inode) {
+		cifs_inode = CIFS_I(inode);
+		cifs_inode->time = 0;	/* will force revalidate to get info
+					   when needed */
+		inode_set_ctime_current(inode);
+	}
+	inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));
+	cifs_inode = CIFS_I(dir);
+	CIFS_I(dir)->time = 0;	/* force revalidate of dir as well */
+unlink_out:
+	free_dentry_path(page);
+	kfree(attrs);
+	free_xid(xid);
+	cifs_put_tlink(tlink);
+	return rc;
+}
+
+static int
+cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode,
+		 const char *full_path, struct cifs_sb_info *cifs_sb,
+		 struct cifs_tcon *tcon, const unsigned int xid)
+{
+	int rc = 0;
+	struct inode *inode = NULL;
+
+	if (tcon->posix_extensions)
+		rc = smb311_posix_get_inode_info(&inode, full_path, parent->i_sb, xid);
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	else if (tcon->unix_ext)
+		rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb,
+					      xid);
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+	else
+		rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb,
+					 xid, NULL);
+
+	if (rc)
+		return rc;
+
+	if (!S_ISDIR(inode->i_mode)) {
+		/*
+		 * mkdir succeeded, but another client has managed to remove the
+		 * sucker and replace it with non-directory.  Return success,
+		 * but don't leave the child in dcache.
+		 */
+		 iput(inode);
+		 d_drop(dentry);
+		 return 0;
+	}
+	/*
+	 * setting nlink not necessary except in cases where we failed to get it
+	 * from the server or was set bogus. Also, since this is a brand new
+	 * inode, no need to grab the i_lock before setting the i_nlink.
+	 */
+	if (inode->i_nlink < 2)
+		set_nlink(inode, 2);
+	mode &= ~current_umask();
+	/* must turn on setgid bit if parent dir has it */
+	if (parent->i_mode & S_ISGID)
+		mode |= S_ISGID;
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	if (tcon->unix_ext) {
+		struct cifs_unix_set_info_args args = {
+			.mode	= mode,
+			.ctime	= NO_CHANGE_64,
+			.atime	= NO_CHANGE_64,
+			.mtime	= NO_CHANGE_64,
+			.device	= 0,
+		};
+		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
+			args.uid = current_fsuid();
+			if (parent->i_mode & S_ISGID)
+				args.gid = parent->i_gid;
+			else
+				args.gid = current_fsgid();
+		} else {
+			args.uid = INVALID_UID; /* no change */
+			args.gid = INVALID_GID; /* no change */
+		}
+		CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
+				       cifs_sb->local_nls,
+				       cifs_remap(cifs_sb));
+	} else {
+#else
+	{
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+		struct TCP_Server_Info *server = tcon->ses->server;
+		if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
+		    (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo)
+			server->ops->mkdir_setinfo(inode, full_path, cifs_sb,
+						   tcon, xid);
+		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
+			inode->i_mode = (mode | S_IFDIR);
+
+		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
+			inode->i_uid = current_fsuid();
+			if (inode->i_mode & S_ISGID)
+				inode->i_gid = parent->i_gid;
+			else
+				inode->i_gid = current_fsgid();
+		}
+	}
+	d_instantiate(dentry, inode);
+	return 0;
+}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+static int
+cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode,
+		 const char *full_path, struct cifs_sb_info *cifs_sb,
+		 struct cifs_tcon *tcon, const unsigned int xid)
+{
+	int rc = 0;
+	u32 oplock = 0;
+	FILE_UNIX_BASIC_INFO *info = NULL;
+	struct inode *newinode = NULL;
+	struct cifs_fattr fattr;
+
+	info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
+	if (info == NULL) {
+		rc = -ENOMEM;
+		goto posix_mkdir_out;
+	}
+
+	mode &= ~current_umask();
+	rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode,
+			     NULL /* netfid */, info, &oplock, full_path,
+			     cifs_sb->local_nls, cifs_remap(cifs_sb));
+	if (rc == -EOPNOTSUPP)
+		goto posix_mkdir_out;
+	else if (rc) {
+		cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc);
+		d_drop(dentry);
+		goto posix_mkdir_out;
+	}
+
+	if (info->Type == cpu_to_le32(-1))
+		/* no return info, go query for it */
+		goto posix_mkdir_get_info;
+	/*
+	 * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if
+	 * need to set uid/gid.
+	 */
+
+	cifs_unix_basic_to_fattr(&fattr, info, cifs_sb);
+	cifs_fill_uniqueid(inode->i_sb, &fattr);
+	newinode = cifs_iget(inode->i_sb, &fattr);
+	if (!newinode)
+		goto posix_mkdir_get_info;
+
+	d_instantiate(dentry, newinode);
+
+#ifdef CONFIG_CIFS_DEBUG2
+	cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n",
+		 dentry, dentry, newinode);
+
+	if (newinode->i_nlink != 2)
+		cifs_dbg(FYI, "unexpected number of links %d\n",
+			 newinode->i_nlink);
+#endif
+
+posix_mkdir_out:
+	kfree(info);
+	return rc;
+posix_mkdir_get_info:
+	rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon,
+			      xid);
+	goto posix_mkdir_out;
+}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+int cifs_mkdir(struct mnt_idmap *idmap, struct inode *inode,
+	       struct dentry *direntry, umode_t mode)
+{
+	int rc = 0;
+	unsigned int xid;
+	struct cifs_sb_info *cifs_sb;
+	struct tcon_link *tlink;
+	struct cifs_tcon *tcon;
+	struct TCP_Server_Info *server;
+	const char *full_path;
+	void *page;
+
+	cifs_dbg(FYI, "In cifs_mkdir, mode = %04ho inode = 0x%p\n",
+		 mode, inode);
+
+	cifs_sb = CIFS_SB(inode->i_sb);
+	if (unlikely(cifs_forced_shutdown(cifs_sb)))
+		return -EIO;
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+	tcon = tlink_tcon(tlink);
+
+	xid = get_xid();
+
+	page = alloc_dentry_path();
+	full_path = build_path_from_dentry(direntry, page);
+	if (IS_ERR(full_path)) {
+		rc = PTR_ERR(full_path);
+		goto mkdir_out;
+	}
+
+	server = tcon->ses->server;
+
+	if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) {
+		rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path,
+					      cifs_sb);
+		d_drop(direntry); /* for time being always refresh inode info */
+		goto mkdir_out;
+	}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
+				le64_to_cpu(tcon->fsUnixInfo.Capability))) {
+		rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb,
+				      tcon, xid);
+		if (rc != -EOPNOTSUPP)
+			goto mkdir_out;
+	}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+	if (!server->ops->mkdir) {
+		rc = -ENOSYS;
+		goto mkdir_out;
+	}
+
+	/* BB add setting the equivalent of mode via CreateX w/ACLs */
+	rc = server->ops->mkdir(xid, inode, mode, tcon, full_path, cifs_sb);
+	if (rc) {
+		cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc);
+		d_drop(direntry);
+		goto mkdir_out;
+	}
+
+	/* TODO: skip this for smb2/smb3 */
+	rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon,
+			      xid);
+mkdir_out:
+	/*
+	 * Force revalidate to get parent dir info when needed since cached
+	 * attributes are invalid now.
+	 */
+	CIFS_I(inode)->time = 0;
+	free_dentry_path(page);
+	free_xid(xid);
+	cifs_put_tlink(tlink);
+	return rc;
+}
+
+int cifs_rmdir(struct inode *inode, struct dentry *direntry)
+{
+	int rc = 0;
+	unsigned int xid;
+	struct cifs_sb_info *cifs_sb;
+	struct tcon_link *tlink;
+	struct cifs_tcon *tcon;
+	struct TCP_Server_Info *server;
+	const char *full_path;
+	void *page = alloc_dentry_path();
+	struct cifsInodeInfo *cifsInode;
+
+	cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode);
+
+	xid = get_xid();
+
+	full_path = build_path_from_dentry(direntry, page);
+	if (IS_ERR(full_path)) {
+		rc = PTR_ERR(full_path);
+		goto rmdir_exit;
+	}
+
+	cifs_sb = CIFS_SB(inode->i_sb);
+	if (unlikely(cifs_forced_shutdown(cifs_sb))) {
+		rc = -EIO;
+		goto rmdir_exit;
+	}
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink)) {
+		rc = PTR_ERR(tlink);
+		goto rmdir_exit;
+	}
+	tcon = tlink_tcon(tlink);
+	server = tcon->ses->server;
+
+	if (!server->ops->rmdir) {
+		rc = -ENOSYS;
+		cifs_put_tlink(tlink);
+		goto rmdir_exit;
+	}
+
+	if (tcon->nodelete) {
+		rc = -EACCES;
+		cifs_put_tlink(tlink);
+		goto rmdir_exit;
+	}
+
+	rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb);
+	cifs_put_tlink(tlink);
+
+	if (!rc) {
+		spin_lock(&d_inode(direntry)->i_lock);
+		i_size_write(d_inode(direntry), 0);
+		clear_nlink(d_inode(direntry));
+		spin_unlock(&d_inode(direntry)->i_lock);
+	}
+
+	cifsInode = CIFS_I(d_inode(direntry));
+	/* force revalidate to go get info when needed */
+	cifsInode->time = 0;
+
+	cifsInode = CIFS_I(inode);
+	/*
+	 * Force revalidate to get parent dir info when needed since cached
+	 * attributes are invalid now.
+	 */
+	cifsInode->time = 0;
+
+	inode_set_ctime_current(d_inode(direntry));
+	inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
+
+rmdir_exit:
+	free_dentry_path(page);
+	free_xid(xid);
+	return rc;
+}
+
+static int
+cifs_do_rename(const unsigned int xid, struct dentry *from_dentry,
+	       const char *from_path, struct dentry *to_dentry,
+	       const char *to_path)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
+	struct tcon_link *tlink;
+	struct cifs_tcon *tcon;
+	struct TCP_Server_Info *server;
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	struct cifs_fid fid;
+	struct cifs_open_parms oparms;
+	int oplock;
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+	int rc;
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+	tcon = tlink_tcon(tlink);
+	server = tcon->ses->server;
+
+	if (!server->ops->rename)
+		return -ENOSYS;
+
+	/* try path-based rename first */
+	rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb);
+
+	/*
+	 * Don't bother with rename by filehandle unless file is busy and
+	 * source. Note that cross directory moves do not work with
+	 * rename by filehandle to various Windows servers.
+	 */
+	if (rc == 0 || rc != -EBUSY)
+		goto do_rename_exit;
+
+	/* Don't fall back to using SMB on SMB 2+ mount */
+	if (server->vals->protocol_id != 0)
+		goto do_rename_exit;
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	/* open-file renames don't work across directories */
+	if (to_dentry->d_parent != from_dentry->d_parent)
+		goto do_rename_exit;
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.cifs_sb = cifs_sb,
+		/* open the file to be renamed -- we need DELETE perms */
+		.desired_access = DELETE,
+		.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR),
+		.disposition = FILE_OPEN,
+		.path = from_path,
+		.fid = &fid,
+	};
+
+	rc = CIFS_open(xid, &oparms, &oplock, NULL);
+	if (rc == 0) {
+		rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid,
+				(const char *) to_dentry->d_name.name,
+				cifs_sb->local_nls, cifs_remap(cifs_sb));
+		CIFSSMBClose(xid, tcon, fid.netfid);
+	}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+do_rename_exit:
+	if (rc == 0)
+		d_move(from_dentry, to_dentry);
+	cifs_put_tlink(tlink);
+	return rc;
+}
+
+int
+cifs_rename2(struct mnt_idmap *idmap, struct inode *source_dir,
+	     struct dentry *source_dentry, struct inode *target_dir,
+	     struct dentry *target_dentry, unsigned int flags)
+{
+	const char *from_name, *to_name;
+	void *page1, *page2;
+	struct cifs_sb_info *cifs_sb;
+	struct tcon_link *tlink;
+	struct cifs_tcon *tcon;
+	unsigned int xid;
+	int rc, tmprc;
+	int retry_count = 0;
+	FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	FILE_UNIX_BASIC_INFO *info_buf_target;
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+	if (flags & ~RENAME_NOREPLACE)
+		return -EINVAL;
+
+	cifs_sb = CIFS_SB(source_dir->i_sb);
+	if (unlikely(cifs_forced_shutdown(cifs_sb)))
+		return -EIO;
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+	tcon = tlink_tcon(tlink);
+
+	page1 = alloc_dentry_path();
+	page2 = alloc_dentry_path();
+	xid = get_xid();
+
+	from_name = build_path_from_dentry(source_dentry, page1);
+	if (IS_ERR(from_name)) {
+		rc = PTR_ERR(from_name);
+		goto cifs_rename_exit;
+	}
+
+	to_name = build_path_from_dentry(target_dentry, page2);
+	if (IS_ERR(to_name)) {
+		rc = PTR_ERR(to_name);
+		goto cifs_rename_exit;
+	}
+
+	cifs_close_deferred_file_under_dentry(tcon, from_name);
+	if (d_inode(target_dentry) != NULL)
+		cifs_close_deferred_file_under_dentry(tcon, to_name);
+
+	rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry,
+			    to_name);
+
+	if (rc == -EACCES) {
+		while (retry_count < 3) {
+			cifs_close_all_deferred_files(tcon);
+			rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry,
+					    to_name);
+			if (rc != -EACCES)
+				break;
+			retry_count++;
+		}
+	}
+
+	/*
+	 * No-replace is the natural behavior for CIFS, so skip unlink hacks.
+	 */
+	if (flags & RENAME_NOREPLACE)
+		goto cifs_rename_exit;
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	if (rc == -EEXIST && tcon->unix_ext) {
+		/*
+		 * Are src and dst hardlinks of same inode? We can only tell
+		 * with unix extensions enabled.
+		 */
+		info_buf_source =
+			kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO),
+					GFP_KERNEL);
+		if (info_buf_source == NULL) {
+			rc = -ENOMEM;
+			goto cifs_rename_exit;
+		}
+
+		info_buf_target = info_buf_source + 1;
+		tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name,
+					     info_buf_source,
+					     cifs_sb->local_nls,
+					     cifs_remap(cifs_sb));
+		if (tmprc != 0)
+			goto unlink_target;
+
+		tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name,
+					     info_buf_target,
+					     cifs_sb->local_nls,
+					     cifs_remap(cifs_sb));
+
+		if (tmprc == 0 && (info_buf_source->UniqueId ==
+				   info_buf_target->UniqueId)) {
+			/* same file, POSIX says that this is a noop */
+			rc = 0;
+			goto cifs_rename_exit;
+		}
+	}
+	/*
+	 * else ... BB we could add the same check for Windows by
+	 * checking the UniqueId via FILE_INTERNAL_INFO
+	 */
+
+unlink_target:
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+	/* Try unlinking the target dentry if it's not negative */
+	if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) {
+		if (d_is_dir(target_dentry))
+			tmprc = cifs_rmdir(target_dir, target_dentry);
+		else
+			tmprc = cifs_unlink(target_dir, target_dentry);
+		if (tmprc)
+			goto cifs_rename_exit;
+		rc = cifs_do_rename(xid, source_dentry, from_name,
+				    target_dentry, to_name);
+	}
+
+	/* force revalidate to go get info when needed */
+	CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0;
+
+cifs_rename_exit:
+	kfree(info_buf_source);
+	free_dentry_path(page2);
+	free_dentry_path(page1);
+	free_xid(xid);
+	cifs_put_tlink(tlink);
+	return rc;
+}
+
+static bool
+cifs_dentry_needs_reval(struct dentry *dentry)
+{
+	struct inode *inode = d_inode(dentry);
+	struct cifsInodeInfo *cifs_i = CIFS_I(inode);
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+	struct cached_fid *cfid = NULL;
+
+	if (cifs_i->time == 0)
+		return true;
+
+	if (CIFS_CACHE_READ(cifs_i))
+		return false;
+
+	if (!lookupCacheEnabled)
+		return true;
+
+	if (!open_cached_dir_by_dentry(tcon, dentry->d_parent, &cfid)) {
+		spin_lock(&cfid->fid_lock);
+		if (cfid->time && cifs_i->time > cfid->time) {
+			spin_unlock(&cfid->fid_lock);
+			close_cached_dir(cfid);
+			return false;
+		}
+		spin_unlock(&cfid->fid_lock);
+		close_cached_dir(cfid);
+	}
+	/*
+	 * depending on inode type, check if attribute caching disabled for
+	 * files or directories
+	 */
+	if (S_ISDIR(inode->i_mode)) {
+		if (!cifs_sb->ctx->acdirmax)
+			return true;
+		if (!time_in_range(jiffies, cifs_i->time,
+				   cifs_i->time + cifs_sb->ctx->acdirmax))
+			return true;
+	} else { /* file */
+		if (!cifs_sb->ctx->acregmax)
+			return true;
+		if (!time_in_range(jiffies, cifs_i->time,
+				   cifs_i->time + cifs_sb->ctx->acregmax))
+			return true;
+	}
+
+	/* hardlinked files w/ noserverino get "special" treatment */
+	if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) &&
+	    S_ISREG(inode->i_mode) && inode->i_nlink != 1)
+		return true;
+
+	return false;
+}
+
+/*
+ * Zap the cache. Called when invalid_mapping flag is set.
+ */
+int
+cifs_invalidate_mapping(struct inode *inode)
+{
+	int rc = 0;
+
+	if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
+		rc = invalidate_inode_pages2(inode->i_mapping);
+		if (rc)
+			cifs_dbg(VFS, "%s: invalidate inode %p failed with rc %d\n",
+				 __func__, inode, rc);
+	}
+
+	return rc;
+}
+
+/**
+ * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks
+ *
+ * @key:	currently unused
+ * @mode:	the task state to sleep in
+ */
+static int
+cifs_wait_bit_killable(struct wait_bit_key *key, int mode)
+{
+	schedule();
+	if (signal_pending_state(mode, current))
+		return -ERESTARTSYS;
+	return 0;
+}
+
+int
+cifs_revalidate_mapping(struct inode *inode)
+{
+	int rc;
+	unsigned long *flags = &CIFS_I(inode)->flags;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+
+	/* swapfiles are not supposed to be shared */
+	if (IS_SWAPFILE(inode))
+		return 0;
+
+	rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable,
+				     TASK_KILLABLE|TASK_FREEZABLE_UNSAFE);
+	if (rc)
+		return rc;
+
+	if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) {
+		/* for cache=singleclient, do not invalidate */
+		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RW_CACHE)
+			goto skip_invalidate;
+
+		rc = cifs_invalidate_mapping(inode);
+		if (rc)
+			set_bit(CIFS_INO_INVALID_MAPPING, flags);
+	}
+
+skip_invalidate:
+	clear_bit_unlock(CIFS_INO_LOCK, flags);
+	smp_mb__after_atomic();
+	wake_up_bit(flags, CIFS_INO_LOCK);
+
+	return rc;
+}
+
+int
+cifs_zap_mapping(struct inode *inode)
+{
+	set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags);
+	return cifs_revalidate_mapping(inode);
+}
+
+int cifs_revalidate_file_attr(struct file *filp)
+{
+	int rc = 0;
+	struct dentry *dentry = file_dentry(filp);
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+	if (!cifs_dentry_needs_reval(dentry))
+		return rc;
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	if (tlink_tcon(cfile->tlink)->unix_ext)
+		rc = cifs_get_file_info_unix(filp);
+	else
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+		rc = cifs_get_file_info(filp);
+
+	return rc;
+}
+
+int cifs_revalidate_dentry_attr(struct dentry *dentry)
+{
+	unsigned int xid;
+	int rc = 0;
+	struct inode *inode = d_inode(dentry);
+	struct super_block *sb = dentry->d_sb;
+	const char *full_path;
+	void *page;
+	int count = 0;
+
+	if (inode == NULL)
+		return -ENOENT;
+
+	if (!cifs_dentry_needs_reval(dentry))
+		return rc;
+
+	xid = get_xid();
+
+	page = alloc_dentry_path();
+	full_path = build_path_from_dentry(dentry, page);
+	if (IS_ERR(full_path)) {
+		rc = PTR_ERR(full_path);
+		goto out;
+	}
+
+	cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n",
+		 full_path, inode, inode->i_count.counter,
+		 dentry, cifs_get_time(dentry), jiffies);
+
+again:
+	if (cifs_sb_master_tcon(CIFS_SB(sb))->posix_extensions)
+		rc = smb311_posix_get_inode_info(&inode, full_path, sb, xid);
+	else if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
+		rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
+	else
+		rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
+					 xid, NULL);
+	if (rc == -EAGAIN && count++ < 10)
+		goto again;
+out:
+	free_dentry_path(page);
+	free_xid(xid);
+
+	return rc;
+}
+
+int cifs_revalidate_file(struct file *filp)
+{
+	int rc;
+	struct inode *inode = file_inode(filp);
+
+	rc = cifs_revalidate_file_attr(filp);
+	if (rc)
+		return rc;
+
+	return cifs_revalidate_mapping(inode);
+}
+
+/* revalidate a dentry's inode attributes */
+int cifs_revalidate_dentry(struct dentry *dentry)
+{
+	int rc;
+	struct inode *inode = d_inode(dentry);
+
+	rc = cifs_revalidate_dentry_attr(dentry);
+	if (rc)
+		return rc;
+
+	return cifs_revalidate_mapping(inode);
+}
+
+int cifs_getattr(struct mnt_idmap *idmap, const struct path *path,
+		 struct kstat *stat, u32 request_mask, unsigned int flags)
+{
+	struct dentry *dentry = path->dentry;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb);
+	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+	struct inode *inode = d_inode(dentry);
+	int rc;
+
+	if (unlikely(cifs_forced_shutdown(CIFS_SB(inode->i_sb))))
+		return -EIO;
+
+	/*
+	 * We need to be sure that all dirty pages are written and the server
+	 * has actual ctime, mtime and file length.
+	 */
+	if ((request_mask & (STATX_CTIME | STATX_MTIME | STATX_SIZE | STATX_BLOCKS)) &&
+	    !CIFS_CACHE_READ(CIFS_I(inode)) &&
+	    inode->i_mapping && inode->i_mapping->nrpages != 0) {
+		rc = filemap_fdatawait(inode->i_mapping);
+		if (rc) {
+			mapping_set_error(inode->i_mapping, rc);
+			return rc;
+		}
+	}
+
+	if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_FORCE_SYNC)
+		CIFS_I(inode)->time = 0; /* force revalidate */
+
+	/*
+	 * If the caller doesn't require syncing, only sync if
+	 * necessary (e.g. due to earlier truncate or setattr
+	 * invalidating the cached metadata)
+	 */
+	if (((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) ||
+	    (CIFS_I(inode)->time == 0)) {
+		rc = cifs_revalidate_dentry_attr(dentry);
+		if (rc)
+			return rc;
+	}
+
+	generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat);
+	stat->blksize = cifs_sb->ctx->bsize;
+	stat->ino = CIFS_I(inode)->uniqueid;
+
+	/* old CIFS Unix Extensions doesn't return create time */
+	if (CIFS_I(inode)->createtime) {
+		stat->result_mask |= STATX_BTIME;
+		stat->btime =
+		      cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime));
+	}
+
+	stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED);
+	if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED)
+		stat->attributes |= STATX_ATTR_COMPRESSED;
+	if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED)
+		stat->attributes |= STATX_ATTR_ENCRYPTED;
+
+	/*
+	 * If on a multiuser mount without unix extensions or cifsacl being
+	 * enabled, and the admin hasn't overridden them, set the ownership
+	 * to the fsuid/fsgid of the current process.
+	 */
+	if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) &&
+	    !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
+	    !tcon->unix_ext) {
+		if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID))
+			stat->uid = current_fsuid();
+		if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID))
+			stat->gid = current_fsgid();
+	}
+	return 0;
+}
+
+int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start,
+		u64 len)
+{
+	struct cifsInodeInfo *cifs_i = CIFS_I(inode);
+	struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->netfs.inode.i_sb);
+	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+	struct TCP_Server_Info *server = tcon->ses->server;
+	struct cifsFileInfo *cfile;
+	int rc;
+
+	if (unlikely(cifs_forced_shutdown(cifs_sb)))
+		return -EIO;
+
+	/*
+	 * We need to be sure that all dirty pages are written as they
+	 * might fill holes on the server.
+	 */
+	if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
+	    inode->i_mapping->nrpages != 0) {
+		rc = filemap_fdatawait(inode->i_mapping);
+		if (rc) {
+			mapping_set_error(inode->i_mapping, rc);
+			return rc;
+		}
+	}
+
+	cfile = find_readable_file(cifs_i, false);
+	if (cfile == NULL)
+		return -EINVAL;
+
+	if (server->ops->fiemap) {
+		rc = server->ops->fiemap(tcon, cfile, fei, start, len);
+		cifsFileInfo_put(cfile);
+		return rc;
+	}
+
+	cifsFileInfo_put(cfile);
+	return -EOPNOTSUPP;
+}
+
+int cifs_truncate_page(struct address_space *mapping, loff_t from)
+{
+	pgoff_t index = from >> PAGE_SHIFT;
+	unsigned offset = from & (PAGE_SIZE - 1);
+	struct page *page;
+	int rc = 0;
+
+	page = grab_cache_page(mapping, index);
+	if (!page)
+		return -ENOMEM;
+
+	zero_user_segment(page, offset, PAGE_SIZE);
+	unlock_page(page);
+	put_page(page);
+	return rc;
+}
+
+void cifs_setsize(struct inode *inode, loff_t offset)
+{
+	struct cifsInodeInfo *cifs_i = CIFS_I(inode);
+
+	spin_lock(&inode->i_lock);
+	i_size_write(inode, offset);
+	spin_unlock(&inode->i_lock);
+
+	/* Cached inode must be refreshed on truncate */
+	cifs_i->time = 0;
+	truncate_pagecache(inode, offset);
+}
+
+static int
+cifs_set_file_size(struct inode *inode, struct iattr *attrs,
+		   unsigned int xid, const char *full_path)
+{
+	int rc;
+	struct cifsFileInfo *open_file;
+	struct cifsInodeInfo *cifsInode = CIFS_I(inode);
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct tcon_link *tlink = NULL;
+	struct cifs_tcon *tcon = NULL;
+	struct TCP_Server_Info *server;
+
+	/*
+	 * To avoid spurious oplock breaks from server, in the case of
+	 * inodes that we already have open, avoid doing path based
+	 * setting of file size if we can do it by handle.
+	 * This keeps our caching token (oplock) and avoids timeouts
+	 * when the local oplock break takes longer to flush
+	 * writebehind data than the SMB timeout for the SetPathInfo
+	 * request would allow
+	 */
+	open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
+	if (open_file) {
+		tcon = tlink_tcon(open_file->tlink);
+		server = tcon->ses->server;
+		if (server->ops->set_file_size)
+			rc = server->ops->set_file_size(xid, tcon, open_file,
+							attrs->ia_size, false);
+		else
+			rc = -ENOSYS;
+		cifsFileInfo_put(open_file);
+		cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc);
+	} else
+		rc = -EINVAL;
+
+	if (!rc)
+		goto set_size_out;
+
+	if (tcon == NULL) {
+		tlink = cifs_sb_tlink(cifs_sb);
+		if (IS_ERR(tlink))
+			return PTR_ERR(tlink);
+		tcon = tlink_tcon(tlink);
+		server = tcon->ses->server;
+	}
+
+	/*
+	 * Set file size by pathname rather than by handle either because no
+	 * valid, writeable file handle for it was found or because there was
+	 * an error setting it by handle.
+	 */
+	if (server->ops->set_path_size)
+		rc = server->ops->set_path_size(xid, tcon, full_path,
+						attrs->ia_size, cifs_sb, false);
+	else
+		rc = -ENOSYS;
+	cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc);
+
+	if (tlink)
+		cifs_put_tlink(tlink);
+
+set_size_out:
+	if (rc == 0) {
+		cifsInode->server_eof = attrs->ia_size;
+		cifs_setsize(inode, attrs->ia_size);
+		/*
+		 * i_blocks is not related to (i_size / i_blksize), but instead
+		 * 512 byte (2**9) size is required for calculating num blocks.
+		 * Until we can query the server for actual allocation size,
+		 * this is best estimate we have for blocks allocated for a file
+		 * Number of blocks must be rounded up so size 1 is not 0 blocks
+		 */
+		inode->i_blocks = (512 - 1 + attrs->ia_size) >> 9;
+
+		/*
+		 * The man page of truncate says if the size changed,
+		 * then the st_ctime and st_mtime fields for the file
+		 * are updated.
+		 */
+		attrs->ia_ctime = attrs->ia_mtime = current_time(inode);
+		attrs->ia_valid |= ATTR_CTIME | ATTR_MTIME;
+
+		cifs_truncate_page(inode->i_mapping, inode->i_size);
+	}
+
+	return rc;
+}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+static int
+cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
+{
+	int rc;
+	unsigned int xid;
+	const char *full_path;
+	void *page = alloc_dentry_path();
+	struct inode *inode = d_inode(direntry);
+	struct cifsInodeInfo *cifsInode = CIFS_I(inode);
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct tcon_link *tlink;
+	struct cifs_tcon *pTcon;
+	struct cifs_unix_set_info_args *args = NULL;
+	struct cifsFileInfo *open_file;
+
+	cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n",
+		 direntry, attrs->ia_valid);
+
+	xid = get_xid();
+
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
+		attrs->ia_valid |= ATTR_FORCE;
+
+	rc = setattr_prepare(&nop_mnt_idmap, direntry, attrs);
+	if (rc < 0)
+		goto out;
+
+	full_path = build_path_from_dentry(direntry, page);
+	if (IS_ERR(full_path)) {
+		rc = PTR_ERR(full_path);
+		goto out;
+	}
+
+	/*
+	 * Attempt to flush data before changing attributes. We need to do
+	 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
+	 * ownership or mode then we may also need to do this. Here, we take
+	 * the safe way out and just do the flush on all setattr requests. If
+	 * the flush returns error, store it to report later and continue.
+	 *
+	 * BB: This should be smarter. Why bother flushing pages that
+	 * will be truncated anyway? Also, should we error out here if
+	 * the flush returns error?
+	 */
+	rc = filemap_write_and_wait(inode->i_mapping);
+	if (is_interrupt_error(rc)) {
+		rc = -ERESTARTSYS;
+		goto out;
+	}
+
+	mapping_set_error(inode->i_mapping, rc);
+	rc = 0;
+
+	if (attrs->ia_valid & ATTR_SIZE) {
+		rc = cifs_set_file_size(inode, attrs, xid, full_path);
+		if (rc != 0)
+			goto out;
+	}
+
+	/* skip mode change if it's just for clearing setuid/setgid */
+	if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
+		attrs->ia_valid &= ~ATTR_MODE;
+
+	args = kmalloc(sizeof(*args), GFP_KERNEL);
+	if (args == NULL) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	/* set up the struct */
+	if (attrs->ia_valid & ATTR_MODE)
+		args->mode = attrs->ia_mode;
+	else
+		args->mode = NO_CHANGE_64;
+
+	if (attrs->ia_valid & ATTR_UID)
+		args->uid = attrs->ia_uid;
+	else
+		args->uid = INVALID_UID; /* no change */
+
+	if (attrs->ia_valid & ATTR_GID)
+		args->gid = attrs->ia_gid;
+	else
+		args->gid = INVALID_GID; /* no change */
+
+	if (attrs->ia_valid & ATTR_ATIME)
+		args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
+	else
+		args->atime = NO_CHANGE_64;
+
+	if (attrs->ia_valid & ATTR_MTIME)
+		args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
+	else
+		args->mtime = NO_CHANGE_64;
+
+	if (attrs->ia_valid & ATTR_CTIME)
+		args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
+	else
+		args->ctime = NO_CHANGE_64;
+
+	args->device = 0;
+	open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY);
+	if (open_file) {
+		u16 nfid = open_file->fid.netfid;
+		u32 npid = open_file->pid;
+		pTcon = tlink_tcon(open_file->tlink);
+		rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
+		cifsFileInfo_put(open_file);
+	} else {
+		tlink = cifs_sb_tlink(cifs_sb);
+		if (IS_ERR(tlink)) {
+			rc = PTR_ERR(tlink);
+			goto out;
+		}
+		pTcon = tlink_tcon(tlink);
+		rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
+				    cifs_sb->local_nls,
+				    cifs_remap(cifs_sb));
+		cifs_put_tlink(tlink);
+	}
+
+	if (rc)
+		goto out;
+
+	if ((attrs->ia_valid & ATTR_SIZE) &&
+	    attrs->ia_size != i_size_read(inode)) {
+		truncate_setsize(inode, attrs->ia_size);
+		fscache_resize_cookie(cifs_inode_cookie(inode), attrs->ia_size);
+	}
+
+	setattr_copy(&nop_mnt_idmap, inode, attrs);
+	mark_inode_dirty(inode);
+
+	/* force revalidate when any of these times are set since some
+	   of the fs types (eg ext3, fat) do not have fine enough
+	   time granularity to match protocol, and we do not have a
+	   a way (yet) to query the server fs's time granularity (and
+	   whether it rounds times down).
+	*/
+	if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME))
+		cifsInode->time = 0;
+out:
+	kfree(args);
+	free_dentry_path(page);
+	free_xid(xid);
+	return rc;
+}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+static int
+cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
+{
+	unsigned int xid;
+	kuid_t uid = INVALID_UID;
+	kgid_t gid = INVALID_GID;
+	struct inode *inode = d_inode(direntry);
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct cifsInodeInfo *cifsInode = CIFS_I(inode);
+	struct cifsFileInfo *wfile;
+	struct cifs_tcon *tcon;
+	const char *full_path;
+	void *page = alloc_dentry_path();
+	int rc = -EACCES;
+	__u32 dosattr = 0;
+	__u64 mode = NO_CHANGE_64;
+
+	xid = get_xid();
+
+	cifs_dbg(FYI, "setattr on file %pd attrs->ia_valid 0x%x\n",
+		 direntry, attrs->ia_valid);
+
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
+		attrs->ia_valid |= ATTR_FORCE;
+
+	rc = setattr_prepare(&nop_mnt_idmap, direntry, attrs);
+	if (rc < 0)
+		goto cifs_setattr_exit;
+
+	full_path = build_path_from_dentry(direntry, page);
+	if (IS_ERR(full_path)) {
+		rc = PTR_ERR(full_path);
+		goto cifs_setattr_exit;
+	}
+
+	/*
+	 * Attempt to flush data before changing attributes. We need to do
+	 * this for ATTR_SIZE and ATTR_MTIME.  If the flush of the data
+	 * returns error, store it to report later and continue.
+	 *
+	 * BB: This should be smarter. Why bother flushing pages that
+	 * will be truncated anyway? Also, should we error out here if
+	 * the flush returns error? Do we need to check for ATTR_MTIME_SET flag?
+	 */
+	if (attrs->ia_valid & (ATTR_MTIME | ATTR_SIZE | ATTR_CTIME)) {
+		rc = filemap_write_and_wait(inode->i_mapping);
+		if (is_interrupt_error(rc)) {
+			rc = -ERESTARTSYS;
+			goto cifs_setattr_exit;
+		}
+		mapping_set_error(inode->i_mapping, rc);
+	}
+
+	rc = 0;
+
+	if ((attrs->ia_valid & ATTR_MTIME) &&
+	    !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) {
+		rc = cifs_get_writable_file(cifsInode, FIND_WR_ANY, &wfile);
+		if (!rc) {
+			tcon = tlink_tcon(wfile->tlink);
+			rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid);
+			cifsFileInfo_put(wfile);
+			if (rc)
+				goto cifs_setattr_exit;
+		} else if (rc != -EBADF)
+			goto cifs_setattr_exit;
+		else
+			rc = 0;
+	}
+
+	if (attrs->ia_valid & ATTR_SIZE) {
+		rc = cifs_set_file_size(inode, attrs, xid, full_path);
+		if (rc != 0)
+			goto cifs_setattr_exit;
+	}
+
+	if (attrs->ia_valid & ATTR_UID)
+		uid = attrs->ia_uid;
+
+	if (attrs->ia_valid & ATTR_GID)
+		gid = attrs->ia_gid;
+
+	if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
+	    (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
+		if (uid_valid(uid) || gid_valid(gid)) {
+			mode = NO_CHANGE_64;
+			rc = id_mode_to_cifs_acl(inode, full_path, &mode,
+							uid, gid);
+			if (rc) {
+				cifs_dbg(FYI, "%s: Setting id failed with error: %d\n",
+					 __func__, rc);
+				goto cifs_setattr_exit;
+			}
+		}
+	} else
+	if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
+		attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
+
+	/* skip mode change if it's just for clearing setuid/setgid */
+	if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
+		attrs->ia_valid &= ~ATTR_MODE;
+
+	if (attrs->ia_valid & ATTR_MODE) {
+		mode = attrs->ia_mode;
+		rc = 0;
+		if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
+		    (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) {
+			rc = id_mode_to_cifs_acl(inode, full_path, &mode,
+						INVALID_UID, INVALID_GID);
+			if (rc) {
+				cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n",
+					 __func__, rc);
+				goto cifs_setattr_exit;
+			}
+
+			/*
+			 * In case of CIFS_MOUNT_CIFS_ACL, we cannot support all modes.
+			 * Pick up the actual mode bits that were set.
+			 */
+			if (mode != attrs->ia_mode)
+				attrs->ia_mode = mode;
+		} else
+		if (((mode & S_IWUGO) == 0) &&
+		    (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
+
+			dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
+
+			/* fix up mode if we're not using dynperm */
+			if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
+				attrs->ia_mode = inode->i_mode & ~S_IWUGO;
+		} else if ((mode & S_IWUGO) &&
+			   (cifsInode->cifsAttrs & ATTR_READONLY)) {
+
+			dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
+			/* Attributes of 0 are ignored */
+			if (dosattr == 0)
+				dosattr |= ATTR_NORMAL;
+
+			/* reset local inode permissions to normal */
+			if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
+				attrs->ia_mode &= ~(S_IALLUGO);
+				if (S_ISDIR(inode->i_mode))
+					attrs->ia_mode |=
+						cifs_sb->ctx->dir_mode;
+				else
+					attrs->ia_mode |=
+						cifs_sb->ctx->file_mode;
+			}
+		} else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
+			/* ignore mode change - ATTR_READONLY hasn't changed */
+			attrs->ia_valid &= ~ATTR_MODE;
+		}
+	}
+
+	if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
+	    ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
+		rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
+		/* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
+
+		/* Even if error on time set, no sense failing the call if
+		the server would set the time to a reasonable value anyway,
+		and this check ensures that we are not being called from
+		sys_utimes in which case we ought to fail the call back to
+		the user when the server rejects the call */
+		if ((rc) && (attrs->ia_valid &
+				(ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
+			rc = 0;
+	}
+
+	/* do not need local check to inode_check_ok since the server does
+	   that */
+	if (rc)
+		goto cifs_setattr_exit;
+
+	if ((attrs->ia_valid & ATTR_SIZE) &&
+	    attrs->ia_size != i_size_read(inode)) {
+		truncate_setsize(inode, attrs->ia_size);
+		fscache_resize_cookie(cifs_inode_cookie(inode), attrs->ia_size);
+	}
+
+	setattr_copy(&nop_mnt_idmap, inode, attrs);
+	mark_inode_dirty(inode);
+
+cifs_setattr_exit:
+	free_xid(xid);
+	free_dentry_path(page);
+	return rc;
+}
+
+int
+cifs_setattr(struct mnt_idmap *idmap, struct dentry *direntry,
+	     struct iattr *attrs)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
+	int rc, retries = 0;
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb);
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+	if (unlikely(cifs_forced_shutdown(cifs_sb)))
+		return -EIO;
+
+	do {
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+		if (pTcon->unix_ext)
+			rc = cifs_setattr_unix(direntry, attrs);
+		else
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+			rc = cifs_setattr_nounix(direntry, attrs);
+		retries++;
+	} while (is_retryable_error(rc) && retries < 2);
+
+	/* BB: add cifs_setattr_legacy for really old servers */
+	return rc;
+}
diff --git a/fs/smb/client/ioctl.c b/fs/smb/client/ioctl.c
new file mode 100644
index 0000000000..73ededa8eb
--- /dev/null
+++ b/fs/smb/client/ioctl.c
@@ -0,0 +1,569 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *
+ *   vfs operations that deal with io control
+ *
+ *   Copyright (C) International Business Machines  Corp., 2005,2013
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ */
+
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/mount.h>
+#include <linux/mm.h>
+#include <linux/pagemap.h>
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifsfs.h"
+#include "cifs_ioctl.h"
+#include "smb2proto.h"
+#include "smb2glob.h"
+#include <linux/btrfs.h>
+
+static long cifs_ioctl_query_info(unsigned int xid, struct file *filep,
+				  unsigned long p)
+{
+	struct inode *inode = file_inode(filep);
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+	struct dentry *dentry = filep->f_path.dentry;
+	const unsigned char *path;
+	void *page = alloc_dentry_path();
+	__le16 *utf16_path = NULL, root_path;
+	int rc = 0;
+
+	path = build_path_from_dentry(dentry, page);
+	if (IS_ERR(path)) {
+		free_dentry_path(page);
+		return PTR_ERR(path);
+	}
+
+	cifs_dbg(FYI, "%s %s\n", __func__, path);
+
+	if (!path[0]) {
+		root_path = 0;
+		utf16_path = &root_path;
+	} else {
+		utf16_path = cifs_convert_path_to_utf16(path + 1, cifs_sb);
+		if (!utf16_path) {
+			rc = -ENOMEM;
+			goto ici_exit;
+		}
+	}
+
+	if (tcon->ses->server->ops->ioctl_query_info)
+		rc = tcon->ses->server->ops->ioctl_query_info(
+				xid, tcon, cifs_sb, utf16_path,
+				filep->private_data ? 0 : 1, p);
+	else
+		rc = -EOPNOTSUPP;
+
+ ici_exit:
+	if (utf16_path != &root_path)
+		kfree(utf16_path);
+	free_dentry_path(page);
+	return rc;
+}
+
+static long cifs_ioctl_copychunk(unsigned int xid, struct file *dst_file,
+			unsigned long srcfd)
+{
+	int rc;
+	struct fd src_file;
+	struct inode *src_inode;
+
+	cifs_dbg(FYI, "ioctl copychunk range\n");
+	/* the destination must be opened for writing */
+	if (!(dst_file->f_mode & FMODE_WRITE)) {
+		cifs_dbg(FYI, "file target not open for write\n");
+		return -EINVAL;
+	}
+
+	/* check if target volume is readonly and take reference */
+	rc = mnt_want_write_file(dst_file);
+	if (rc) {
+		cifs_dbg(FYI, "mnt_want_write failed with rc %d\n", rc);
+		return rc;
+	}
+
+	src_file = fdget(srcfd);
+	if (!src_file.file) {
+		rc = -EBADF;
+		goto out_drop_write;
+	}
+
+	if (src_file.file->f_op->unlocked_ioctl != cifs_ioctl) {
+		rc = -EBADF;
+		cifs_dbg(VFS, "src file seems to be from a different filesystem type\n");
+		goto out_fput;
+	}
+
+	src_inode = file_inode(src_file.file);
+	rc = -EINVAL;
+	if (S_ISDIR(src_inode->i_mode))
+		goto out_fput;
+
+	rc = cifs_file_copychunk_range(xid, src_file.file, 0, dst_file, 0,
+					src_inode->i_size, 0);
+	if (rc > 0)
+		rc = 0;
+out_fput:
+	fdput(src_file);
+out_drop_write:
+	mnt_drop_write_file(dst_file);
+	return rc;
+}
+
+static long smb_mnt_get_tcon_info(struct cifs_tcon *tcon, void __user *arg)
+{
+	int rc = 0;
+	struct smb_mnt_tcon_info tcon_inf;
+
+	tcon_inf.tid = tcon->tid;
+	tcon_inf.session_id = tcon->ses->Suid;
+
+	if (copy_to_user(arg, &tcon_inf, sizeof(struct smb_mnt_tcon_info)))
+		rc = -EFAULT;
+
+	return rc;
+}
+
+static long smb_mnt_get_fsinfo(unsigned int xid, struct cifs_tcon *tcon,
+				void __user *arg)
+{
+	int rc = 0;
+	struct smb_mnt_fs_info *fsinf;
+
+	fsinf = kzalloc(sizeof(struct smb_mnt_fs_info), GFP_KERNEL);
+	if (fsinf == NULL)
+		return -ENOMEM;
+
+	fsinf->version = 1;
+	fsinf->protocol_id = tcon->ses->server->vals->protocol_id;
+	fsinf->device_characteristics =
+			le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics);
+	fsinf->device_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
+	fsinf->fs_attributes = le32_to_cpu(tcon->fsAttrInfo.Attributes);
+	fsinf->max_path_component =
+		le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength);
+	fsinf->vol_serial_number = tcon->vol_serial_number;
+	fsinf->vol_create_time = le64_to_cpu(tcon->vol_create_time);
+	fsinf->share_flags = tcon->share_flags;
+	fsinf->share_caps = le32_to_cpu(tcon->capabilities);
+	fsinf->sector_flags = tcon->ss_flags;
+	fsinf->optimal_sector_size = tcon->perf_sector_size;
+	fsinf->max_bytes_chunk = tcon->max_bytes_chunk;
+	fsinf->maximal_access = tcon->maximal_access;
+	fsinf->cifs_posix_caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
+
+	if (copy_to_user(arg, fsinf, sizeof(struct smb_mnt_fs_info)))
+		rc = -EFAULT;
+
+	kfree(fsinf);
+	return rc;
+}
+
+static int cifs_shutdown(struct super_block *sb, unsigned long arg)
+{
+	struct cifs_sb_info *sbi = CIFS_SB(sb);
+	__u32 flags;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	if (get_user(flags, (__u32 __user *)arg))
+		return -EFAULT;
+
+	if (flags > CIFS_GOING_FLAGS_NOLOGFLUSH)
+		return -EINVAL;
+
+	if (cifs_forced_shutdown(sbi))
+		return 0;
+
+	cifs_dbg(VFS, "shut down requested (%d)", flags);
+/*	trace_cifs_shutdown(sb, flags);*/
+
+	/*
+	 * see:
+	 *   https://man7.org/linux/man-pages/man2/ioctl_xfs_goingdown.2.html
+	 * for more information and description of original intent of the flags
+	 */
+	switch (flags) {
+	/*
+	 * We could add support later for default flag which requires:
+	 *     "Flush all dirty data and metadata to disk"
+	 * would need to call syncfs or equivalent to flush page cache for
+	 * the mount and then issue fsync to server (if nostrictsync not set)
+	 */
+	case CIFS_GOING_FLAGS_DEFAULT:
+		cifs_dbg(FYI, "shutdown with default flag not supported\n");
+		return -EINVAL;
+	/*
+	 * FLAGS_LOGFLUSH is easy since it asks to write out metadata (not
+	 * data) but metadata writes are not cached on the client, so can treat
+	 * it similarly to NOLOGFLUSH
+	 */
+	case CIFS_GOING_FLAGS_LOGFLUSH:
+	case CIFS_GOING_FLAGS_NOLOGFLUSH:
+		sbi->mnt_cifs_flags |= CIFS_MOUNT_SHUTDOWN;
+		return 0;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int cifs_dump_full_key(struct cifs_tcon *tcon, struct smb3_full_key_debug_info __user *in)
+{
+	struct smb3_full_key_debug_info out;
+	struct cifs_ses *ses;
+	int rc = 0;
+	bool found = false;
+	u8 __user *end;
+
+	if (!smb3_encryption_required(tcon)) {
+		rc = -EOPNOTSUPP;
+		goto out;
+	}
+
+	/* copy user input into our output buffer */
+	if (copy_from_user(&out, in, sizeof(out))) {
+		rc = -EINVAL;
+		goto out;
+	}
+
+	if (!out.session_id) {
+		/* if ses id is 0, use current user session */
+		ses = tcon->ses;
+	} else {
+		/* otherwise if a session id is given, look for it in all our sessions */
+		struct cifs_ses *ses_it = NULL;
+		struct TCP_Server_Info *server_it = NULL;
+
+		spin_lock(&cifs_tcp_ses_lock);
+		list_for_each_entry(server_it, &cifs_tcp_ses_list, tcp_ses_list) {
+			list_for_each_entry(ses_it, &server_it->smb_ses_list, smb_ses_list) {
+				if (ses_it->Suid == out.session_id) {
+					ses = ses_it;
+					/*
+					 * since we are using the session outside the crit
+					 * section, we need to make sure it won't be released
+					 * so increment its refcount
+					 */
+					cifs_smb_ses_inc_refcount(ses);
+					found = true;
+					goto search_end;
+				}
+			}
+		}
+search_end:
+		spin_unlock(&cifs_tcp_ses_lock);
+		if (!found) {
+			rc = -ENOENT;
+			goto out;
+		}
+	}
+
+	switch (ses->server->cipher_type) {
+	case SMB2_ENCRYPTION_AES128_CCM:
+	case SMB2_ENCRYPTION_AES128_GCM:
+		out.session_key_length = CIFS_SESS_KEY_SIZE;
+		out.server_in_key_length = out.server_out_key_length = SMB3_GCM128_CRYPTKEY_SIZE;
+		break;
+	case SMB2_ENCRYPTION_AES256_CCM:
+	case SMB2_ENCRYPTION_AES256_GCM:
+		out.session_key_length = CIFS_SESS_KEY_SIZE;
+		out.server_in_key_length = out.server_out_key_length = SMB3_GCM256_CRYPTKEY_SIZE;
+		break;
+	default:
+		rc = -EOPNOTSUPP;
+		goto out;
+	}
+
+	/* check if user buffer is big enough to store all the keys */
+	if (out.in_size < sizeof(out) + out.session_key_length + out.server_in_key_length
+	    + out.server_out_key_length) {
+		rc = -ENOBUFS;
+		goto out;
+	}
+
+	out.session_id = ses->Suid;
+	out.cipher_type = le16_to_cpu(ses->server->cipher_type);
+
+	/* overwrite user input with our output */
+	if (copy_to_user(in, &out, sizeof(out))) {
+		rc = -EINVAL;
+		goto out;
+	}
+
+	/* append all the keys at the end of the user buffer */
+	end = in->data;
+	if (copy_to_user(end, ses->auth_key.response, out.session_key_length)) {
+		rc = -EINVAL;
+		goto out;
+	}
+	end += out.session_key_length;
+
+	if (copy_to_user(end, ses->smb3encryptionkey, out.server_in_key_length)) {
+		rc = -EINVAL;
+		goto out;
+	}
+	end += out.server_in_key_length;
+
+	if (copy_to_user(end, ses->smb3decryptionkey, out.server_out_key_length)) {
+		rc = -EINVAL;
+		goto out;
+	}
+
+out:
+	if (found)
+		cifs_put_smb_ses(ses);
+	return rc;
+}
+
+long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
+{
+	struct inode *inode = file_inode(filep);
+	struct smb3_key_debug_info pkey_inf;
+	int rc = -ENOTTY; /* strange error - but the precedent */
+	unsigned int xid;
+	struct cifsFileInfo *pSMBFile = filep->private_data;
+	struct cifs_tcon *tcon;
+	struct tcon_link *tlink;
+	struct cifs_sb_info *cifs_sb;
+	__u64	ExtAttrBits = 0;
+#ifdef CONFIG_CIFS_POSIX
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	__u64   caps;
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+#endif /* CONFIG_CIFS_POSIX */
+
+	xid = get_xid();
+
+	cifs_dbg(FYI, "cifs ioctl 0x%x\n", command);
+	switch (command) {
+		case FS_IOC_GETFLAGS:
+			if (pSMBFile == NULL)
+				break;
+			tcon = tlink_tcon(pSMBFile->tlink);
+#ifdef CONFIG_CIFS_POSIX
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+			caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
+			if (CIFS_UNIX_EXTATTR_CAP & caps) {
+				__u64	ExtAttrMask = 0;
+				rc = CIFSGetExtAttr(xid, tcon,
+						    pSMBFile->fid.netfid,
+						    &ExtAttrBits, &ExtAttrMask);
+				if (rc == 0)
+					rc = put_user(ExtAttrBits &
+						FS_FL_USER_VISIBLE,
+						(int __user *)arg);
+				if (rc != -EOPNOTSUPP)
+					break;
+			}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+#endif /* CONFIG_CIFS_POSIX */
+			rc = 0;
+			if (CIFS_I(inode)->cifsAttrs & ATTR_COMPRESSED) {
+				/* add in the compressed bit */
+				ExtAttrBits = FS_COMPR_FL;
+				rc = put_user(ExtAttrBits & FS_FL_USER_VISIBLE,
+					      (int __user *)arg);
+			}
+			break;
+		case FS_IOC_SETFLAGS:
+			if (pSMBFile == NULL)
+				break;
+			tcon = tlink_tcon(pSMBFile->tlink);
+			/* caps = le64_to_cpu(tcon->fsUnixInfo.Capability); */
+
+			if (get_user(ExtAttrBits, (int __user *)arg)) {
+				rc = -EFAULT;
+				break;
+			}
+
+			/*
+			 * if (CIFS_UNIX_EXTATTR_CAP & caps)
+			 *	rc = CIFSSetExtAttr(xid, tcon,
+			 *		       pSMBFile->fid.netfid,
+			 *		       extAttrBits,
+			 *		       &ExtAttrMask);
+			 * if (rc != -EOPNOTSUPP)
+			 *	break;
+			 */
+
+			/* Currently only flag we can set is compressed flag */
+			if ((ExtAttrBits & FS_COMPR_FL) == 0)
+				break;
+
+			/* Try to set compress flag */
+			if (tcon->ses->server->ops->set_compression) {
+				rc = tcon->ses->server->ops->set_compression(
+							xid, tcon, pSMBFile);
+				cifs_dbg(FYI, "set compress flag rc %d\n", rc);
+			}
+			break;
+		case CIFS_IOC_COPYCHUNK_FILE:
+			rc = cifs_ioctl_copychunk(xid, filep, arg);
+			break;
+		case CIFS_QUERY_INFO:
+			rc = cifs_ioctl_query_info(xid, filep, arg);
+			break;
+		case CIFS_IOC_SET_INTEGRITY:
+			if (pSMBFile == NULL)
+				break;
+			tcon = tlink_tcon(pSMBFile->tlink);
+			if (tcon->ses->server->ops->set_integrity)
+				rc = tcon->ses->server->ops->set_integrity(xid,
+						tcon, pSMBFile);
+			else
+				rc = -EOPNOTSUPP;
+			break;
+		case CIFS_IOC_GET_MNT_INFO:
+			if (pSMBFile == NULL)
+				break;
+			tcon = tlink_tcon(pSMBFile->tlink);
+			rc = smb_mnt_get_fsinfo(xid, tcon, (void __user *)arg);
+			break;
+		case CIFS_IOC_GET_TCON_INFO:
+			cifs_sb = CIFS_SB(inode->i_sb);
+			tlink = cifs_sb_tlink(cifs_sb);
+			if (IS_ERR(tlink)) {
+				rc = PTR_ERR(tlink);
+				break;
+			}
+			tcon = tlink_tcon(tlink);
+			rc = smb_mnt_get_tcon_info(tcon, (void __user *)arg);
+			cifs_put_tlink(tlink);
+			break;
+		case CIFS_ENUMERATE_SNAPSHOTS:
+			if (pSMBFile == NULL)
+				break;
+			if (arg == 0) {
+				rc = -EINVAL;
+				goto cifs_ioc_exit;
+			}
+			tcon = tlink_tcon(pSMBFile->tlink);
+			if (tcon->ses->server->ops->enum_snapshots)
+				rc = tcon->ses->server->ops->enum_snapshots(xid, tcon,
+						pSMBFile, (void __user *)arg);
+			else
+				rc = -EOPNOTSUPP;
+			break;
+		case CIFS_DUMP_KEY:
+			/*
+			 * Dump encryption keys. This is an old ioctl that only
+			 * handles AES-128-{CCM,GCM}.
+			 */
+			if (!capable(CAP_SYS_ADMIN)) {
+				rc = -EACCES;
+				break;
+			}
+
+			cifs_sb = CIFS_SB(inode->i_sb);
+			tlink = cifs_sb_tlink(cifs_sb);
+			if (IS_ERR(tlink)) {
+				rc = PTR_ERR(tlink);
+				break;
+			}
+			tcon = tlink_tcon(tlink);
+			if (!smb3_encryption_required(tcon)) {
+				rc = -EOPNOTSUPP;
+				cifs_put_tlink(tlink);
+				break;
+			}
+			pkey_inf.cipher_type =
+				le16_to_cpu(tcon->ses->server->cipher_type);
+			pkey_inf.Suid = tcon->ses->Suid;
+			memcpy(pkey_inf.auth_key, tcon->ses->auth_key.response,
+					16 /* SMB2_NTLMV2_SESSKEY_SIZE */);
+			memcpy(pkey_inf.smb3decryptionkey,
+			      tcon->ses->smb3decryptionkey, SMB3_SIGN_KEY_SIZE);
+			memcpy(pkey_inf.smb3encryptionkey,
+			      tcon->ses->smb3encryptionkey, SMB3_SIGN_KEY_SIZE);
+			if (copy_to_user((void __user *)arg, &pkey_inf,
+					sizeof(struct smb3_key_debug_info)))
+				rc = -EFAULT;
+			else
+				rc = 0;
+			cifs_put_tlink(tlink);
+			break;
+		case CIFS_DUMP_FULL_KEY:
+			/*
+			 * Dump encryption keys (handles any key sizes)
+			 */
+			if (pSMBFile == NULL)
+				break;
+			if (!capable(CAP_SYS_ADMIN)) {
+				rc = -EACCES;
+				break;
+			}
+			cifs_sb = CIFS_SB(inode->i_sb);
+			tlink = cifs_sb_tlink(cifs_sb);
+			if (IS_ERR(tlink)) {
+				rc = PTR_ERR(tlink);
+				break;
+			}
+
+			tcon = tlink_tcon(tlink);
+			rc = cifs_dump_full_key(tcon, (void __user *)arg);
+			cifs_put_tlink(tlink);
+			break;
+		case CIFS_IOC_NOTIFY:
+			if (!S_ISDIR(inode->i_mode)) {
+				/* Notify can only be done on directories */
+				rc = -EOPNOTSUPP;
+				break;
+			}
+			cifs_sb = CIFS_SB(inode->i_sb);
+			tlink = cifs_sb_tlink(cifs_sb);
+			if (IS_ERR(tlink)) {
+				rc = PTR_ERR(tlink);
+				break;
+			}
+			tcon = tlink_tcon(tlink);
+			if (tcon && tcon->ses->server->ops->notify) {
+				rc = tcon->ses->server->ops->notify(xid,
+						filep, (void __user *)arg,
+						false /* no ret data */);
+				cifs_dbg(FYI, "ioctl notify rc %d\n", rc);
+			} else
+				rc = -EOPNOTSUPP;
+			cifs_put_tlink(tlink);
+			break;
+		case CIFS_IOC_NOTIFY_INFO:
+			if (!S_ISDIR(inode->i_mode)) {
+				/* Notify can only be done on directories */
+				rc = -EOPNOTSUPP;
+				break;
+			}
+			cifs_sb = CIFS_SB(inode->i_sb);
+			tlink = cifs_sb_tlink(cifs_sb);
+			if (IS_ERR(tlink)) {
+				rc = PTR_ERR(tlink);
+				break;
+			}
+			tcon = tlink_tcon(tlink);
+			if (tcon && tcon->ses->server->ops->notify) {
+				rc = tcon->ses->server->ops->notify(xid,
+						filep, (void __user *)arg,
+						true /* return details */);
+				cifs_dbg(FYI, "ioctl notify info rc %d\n", rc);
+			} else
+				rc = -EOPNOTSUPP;
+			cifs_put_tlink(tlink);
+			break;
+		case CIFS_IOC_SHUTDOWN:
+			rc = cifs_shutdown(inode->i_sb, arg);
+			break;
+		default:
+			cifs_dbg(FYI, "unsupported ioctl\n");
+			break;
+	}
+cifs_ioc_exit:
+	free_xid(xid);
+	return rc;
+}
diff --git a/fs/smb/client/link.c b/fs/smb/client/link.c
new file mode 100644
index 0000000000..c66be4904e
--- /dev/null
+++ b/fs/smb/client/link.c
@@ -0,0 +1,650 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *
+ *   Copyright (C) International Business Machines  Corp., 2002,2008
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ */
+#include <linux/fs.h>
+#include <linux/stat.h>
+#include <linux/slab.h>
+#include <linux/namei.h>
+#include "cifsfs.h"
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifs_fs_sb.h"
+#include "cifs_unicode.h"
+#include "smb2proto.h"
+#include "cifs_ioctl.h"
+
+/*
+ * M-F Symlink Functions - Begin
+ */
+
+#define CIFS_MF_SYMLINK_LEN_OFFSET (4+1)
+#define CIFS_MF_SYMLINK_MD5_OFFSET (CIFS_MF_SYMLINK_LEN_OFFSET+(4+1))
+#define CIFS_MF_SYMLINK_LINK_OFFSET (CIFS_MF_SYMLINK_MD5_OFFSET+(32+1))
+#define CIFS_MF_SYMLINK_LINK_MAXLEN (1024)
+#define CIFS_MF_SYMLINK_FILE_SIZE \
+	(CIFS_MF_SYMLINK_LINK_OFFSET + CIFS_MF_SYMLINK_LINK_MAXLEN)
+
+#define CIFS_MF_SYMLINK_LEN_FORMAT "XSym\n%04u\n"
+#define CIFS_MF_SYMLINK_MD5_FORMAT "%16phN\n"
+#define CIFS_MF_SYMLINK_MD5_ARGS(md5_hash) md5_hash
+
+static int
+symlink_hash(unsigned int link_len, const char *link_str, u8 *md5_hash)
+{
+	int rc;
+	struct shash_desc *md5 = NULL;
+
+	rc = cifs_alloc_hash("md5", &md5);
+	if (rc)
+		goto symlink_hash_err;
+
+	rc = crypto_shash_init(md5);
+	if (rc) {
+		cifs_dbg(VFS, "%s: Could not init md5 shash\n", __func__);
+		goto symlink_hash_err;
+	}
+	rc = crypto_shash_update(md5, link_str, link_len);
+	if (rc) {
+		cifs_dbg(VFS, "%s: Could not update with link_str\n", __func__);
+		goto symlink_hash_err;
+	}
+	rc = crypto_shash_final(md5, md5_hash);
+	if (rc)
+		cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
+
+symlink_hash_err:
+	cifs_free_hash(&md5);
+	return rc;
+}
+
+static int
+parse_mf_symlink(const u8 *buf, unsigned int buf_len, unsigned int *_link_len,
+		 char **_link_str)
+{
+	int rc;
+	unsigned int link_len;
+	const char *md5_str1;
+	const char *link_str;
+	u8 md5_hash[16];
+	char md5_str2[34];
+
+	if (buf_len != CIFS_MF_SYMLINK_FILE_SIZE)
+		return -EINVAL;
+
+	md5_str1 = (const char *)&buf[CIFS_MF_SYMLINK_MD5_OFFSET];
+	link_str = (const char *)&buf[CIFS_MF_SYMLINK_LINK_OFFSET];
+
+	rc = sscanf(buf, CIFS_MF_SYMLINK_LEN_FORMAT, &link_len);
+	if (rc != 1)
+		return -EINVAL;
+
+	if (link_len > CIFS_MF_SYMLINK_LINK_MAXLEN)
+		return -EINVAL;
+
+	rc = symlink_hash(link_len, link_str, md5_hash);
+	if (rc) {
+		cifs_dbg(FYI, "%s: MD5 hash failure: %d\n", __func__, rc);
+		return rc;
+	}
+
+	scnprintf(md5_str2, sizeof(md5_str2),
+		  CIFS_MF_SYMLINK_MD5_FORMAT,
+		  CIFS_MF_SYMLINK_MD5_ARGS(md5_hash));
+
+	if (strncmp(md5_str1, md5_str2, 17) != 0)
+		return -EINVAL;
+
+	if (_link_str) {
+		*_link_str = kstrndup(link_str, link_len, GFP_KERNEL);
+		if (!*_link_str)
+			return -ENOMEM;
+	}
+
+	*_link_len = link_len;
+	return 0;
+}
+
+static int
+format_mf_symlink(u8 *buf, unsigned int buf_len, const char *link_str)
+{
+	int rc;
+	unsigned int link_len;
+	unsigned int ofs;
+	u8 md5_hash[16];
+
+	if (buf_len != CIFS_MF_SYMLINK_FILE_SIZE)
+		return -EINVAL;
+
+	link_len = strlen(link_str);
+
+	if (link_len > CIFS_MF_SYMLINK_LINK_MAXLEN)
+		return -ENAMETOOLONG;
+
+	rc = symlink_hash(link_len, link_str, md5_hash);
+	if (rc) {
+		cifs_dbg(FYI, "%s: MD5 hash failure: %d\n", __func__, rc);
+		return rc;
+	}
+
+	scnprintf(buf, buf_len,
+		  CIFS_MF_SYMLINK_LEN_FORMAT CIFS_MF_SYMLINK_MD5_FORMAT,
+		  link_len,
+		  CIFS_MF_SYMLINK_MD5_ARGS(md5_hash));
+
+	ofs = CIFS_MF_SYMLINK_LINK_OFFSET;
+	memcpy(buf + ofs, link_str, link_len);
+
+	ofs += link_len;
+	if (ofs < CIFS_MF_SYMLINK_FILE_SIZE) {
+		buf[ofs] = '\n';
+		ofs++;
+	}
+
+	while (ofs < CIFS_MF_SYMLINK_FILE_SIZE) {
+		buf[ofs] = ' ';
+		ofs++;
+	}
+
+	return 0;
+}
+
+bool
+couldbe_mf_symlink(const struct cifs_fattr *fattr)
+{
+	if (!S_ISREG(fattr->cf_mode))
+		/* it's not a symlink */
+		return false;
+
+	if (fattr->cf_eof != CIFS_MF_SYMLINK_FILE_SIZE)
+		/* it's not a symlink */
+		return false;
+
+	return true;
+}
+
+static int
+create_mf_symlink(const unsigned int xid, struct cifs_tcon *tcon,
+		  struct cifs_sb_info *cifs_sb, const char *fromName,
+		  const char *toName)
+{
+	int rc;
+	u8 *buf;
+	unsigned int bytes_written = 0;
+
+	buf = kmalloc(CIFS_MF_SYMLINK_FILE_SIZE, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	rc = format_mf_symlink(buf, CIFS_MF_SYMLINK_FILE_SIZE, toName);
+	if (rc)
+		goto out;
+
+	if (tcon->ses->server->ops->create_mf_symlink)
+		rc = tcon->ses->server->ops->create_mf_symlink(xid, tcon,
+					cifs_sb, fromName, buf, &bytes_written);
+	else
+		rc = -EOPNOTSUPP;
+
+	if (rc)
+		goto out;
+
+	if (bytes_written != CIFS_MF_SYMLINK_FILE_SIZE)
+		rc = -EIO;
+out:
+	kfree(buf);
+	return rc;
+}
+
+int
+check_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
+		 struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr,
+		 const unsigned char *path)
+{
+	int rc;
+	u8 *buf = NULL;
+	unsigned int link_len = 0;
+	unsigned int bytes_read = 0;
+	char *symlink = NULL;
+
+	if (!couldbe_mf_symlink(fattr))
+		/* it's not a symlink */
+		return 0;
+
+	buf = kmalloc(CIFS_MF_SYMLINK_FILE_SIZE, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	if (tcon->ses->server->ops->query_mf_symlink)
+		rc = tcon->ses->server->ops->query_mf_symlink(xid, tcon,
+					      cifs_sb, path, buf, &bytes_read);
+	else
+		rc = -ENOSYS;
+
+	if (rc)
+		goto out;
+
+	if (bytes_read == 0) /* not a symlink */
+		goto out;
+
+	rc = parse_mf_symlink(buf, bytes_read, &link_len, &symlink);
+	if (rc == -EINVAL) {
+		/* it's not a symlink */
+		rc = 0;
+		goto out;
+	}
+
+	if (rc != 0)
+		goto out;
+
+	/* it is a symlink */
+	fattr->cf_eof = link_len;
+	fattr->cf_mode &= ~S_IFMT;
+	fattr->cf_mode |= S_IFLNK | S_IRWXU | S_IRWXG | S_IRWXO;
+	fattr->cf_dtype = DT_LNK;
+	fattr->cf_symlink_target = symlink;
+out:
+	kfree(buf);
+	return rc;
+}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+/*
+ * SMB 1.0 Protocol specific functions
+ */
+
+int
+cifs_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
+		      struct cifs_sb_info *cifs_sb, const unsigned char *path,
+		      char *pbuf, unsigned int *pbytes_read)
+{
+	int rc;
+	int oplock = 0;
+	struct cifs_fid fid;
+	struct cifs_open_parms oparms;
+	struct cifs_io_parms io_parms = {0};
+	int buf_type = CIFS_NO_BUFFER;
+	FILE_ALL_INFO file_info;
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.cifs_sb = cifs_sb,
+		.desired_access = GENERIC_READ,
+		.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR),
+		.disposition = FILE_OPEN,
+		.path = path,
+		.fid = &fid,
+	};
+
+	rc = CIFS_open(xid, &oparms, &oplock, &file_info);
+	if (rc)
+		return rc;
+
+	if (file_info.EndOfFile != cpu_to_le64(CIFS_MF_SYMLINK_FILE_SIZE)) {
+		rc = -ENOENT;
+		/* it's not a symlink */
+		goto out;
+	}
+
+	io_parms.netfid = fid.netfid;
+	io_parms.pid = current->tgid;
+	io_parms.tcon = tcon;
+	io_parms.offset = 0;
+	io_parms.length = CIFS_MF_SYMLINK_FILE_SIZE;
+
+	rc = CIFSSMBRead(xid, &io_parms, pbytes_read, &pbuf, &buf_type);
+out:
+	CIFSSMBClose(xid, tcon, fid.netfid);
+	return rc;
+}
+
+int
+cifs_create_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
+		       struct cifs_sb_info *cifs_sb, const unsigned char *path,
+		       char *pbuf, unsigned int *pbytes_written)
+{
+	int rc;
+	int oplock = 0;
+	struct cifs_fid fid;
+	struct cifs_open_parms oparms;
+	struct cifs_io_parms io_parms = {0};
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.cifs_sb = cifs_sb,
+		.desired_access = GENERIC_WRITE,
+		.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR),
+		.disposition = FILE_CREATE,
+		.path = path,
+		.fid = &fid,
+	};
+
+	rc = CIFS_open(xid, &oparms, &oplock, NULL);
+	if (rc)
+		return rc;
+
+	io_parms.netfid = fid.netfid;
+	io_parms.pid = current->tgid;
+	io_parms.tcon = tcon;
+	io_parms.offset = 0;
+	io_parms.length = CIFS_MF_SYMLINK_FILE_SIZE;
+
+	rc = CIFSSMBWrite(xid, &io_parms, pbytes_written, pbuf);
+	CIFSSMBClose(xid, tcon, fid.netfid);
+	return rc;
+}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+/*
+ * SMB 2.1/SMB3 Protocol specific functions
+ */
+int
+smb3_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
+		      struct cifs_sb_info *cifs_sb, const unsigned char *path,
+		      char *pbuf, unsigned int *pbytes_read)
+{
+	int rc;
+	struct cifs_fid fid;
+	struct cifs_open_parms oparms;
+	struct cifs_io_parms io_parms = {0};
+	int buf_type = CIFS_NO_BUFFER;
+	__le16 *utf16_path;
+	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
+	struct smb2_file_all_info *pfile_info = NULL;
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.cifs_sb = cifs_sb,
+		.path = path,
+		.desired_access = GENERIC_READ,
+		.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR),
+		.disposition = FILE_OPEN,
+		.fid = &fid,
+	};
+
+	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
+	if (utf16_path == NULL)
+		return -ENOMEM;
+
+	pfile_info = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
+			     GFP_KERNEL);
+
+	if (pfile_info == NULL) {
+		kfree(utf16_path);
+		return  -ENOMEM;
+	}
+
+	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, pfile_info, NULL,
+		       NULL, NULL);
+	if (rc)
+		goto qmf_out_open_fail;
+
+	if (pfile_info->EndOfFile != cpu_to_le64(CIFS_MF_SYMLINK_FILE_SIZE)) {
+		/* it's not a symlink */
+		rc = -ENOENT; /* Is there a better rc to return? */
+		goto qmf_out;
+	}
+
+	io_parms.netfid = fid.netfid;
+	io_parms.pid = current->tgid;
+	io_parms.tcon = tcon;
+	io_parms.offset = 0;
+	io_parms.length = CIFS_MF_SYMLINK_FILE_SIZE;
+	io_parms.persistent_fid = fid.persistent_fid;
+	io_parms.volatile_fid = fid.volatile_fid;
+	rc = SMB2_read(xid, &io_parms, pbytes_read, &pbuf, &buf_type);
+qmf_out:
+	SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
+qmf_out_open_fail:
+	kfree(utf16_path);
+	kfree(pfile_info);
+	return rc;
+}
+
+int
+smb3_create_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
+		       struct cifs_sb_info *cifs_sb, const unsigned char *path,
+		       char *pbuf, unsigned int *pbytes_written)
+{
+	int rc;
+	struct cifs_fid fid;
+	struct cifs_open_parms oparms;
+	struct cifs_io_parms io_parms = {0};
+	__le16 *utf16_path;
+	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
+	struct kvec iov[2];
+
+	cifs_dbg(FYI, "%s: path: %s\n", __func__, path);
+
+	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
+	if (!utf16_path)
+		return -ENOMEM;
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.cifs_sb = cifs_sb,
+		.path = path,
+		.desired_access = GENERIC_WRITE,
+		.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR),
+		.disposition = FILE_CREATE,
+		.fid = &fid,
+		.mode = 0644,
+	};
+
+	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
+		       NULL, NULL);
+	if (rc) {
+		kfree(utf16_path);
+		return rc;
+	}
+
+	io_parms.netfid = fid.netfid;
+	io_parms.pid = current->tgid;
+	io_parms.tcon = tcon;
+	io_parms.offset = 0;
+	io_parms.length = CIFS_MF_SYMLINK_FILE_SIZE;
+	io_parms.persistent_fid = fid.persistent_fid;
+	io_parms.volatile_fid = fid.volatile_fid;
+
+	/* iov[0] is reserved for smb header */
+	iov[1].iov_base = pbuf;
+	iov[1].iov_len = CIFS_MF_SYMLINK_FILE_SIZE;
+
+	rc = SMB2_write(xid, &io_parms, pbytes_written, iov, 1);
+
+	/* Make sure we wrote all of the symlink data */
+	if ((rc == 0) && (*pbytes_written != CIFS_MF_SYMLINK_FILE_SIZE))
+		rc = -EIO;
+
+	SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
+
+	kfree(utf16_path);
+	return rc;
+}
+
+/*
+ * M-F Symlink Functions - End
+ */
+
+int
+cifs_hardlink(struct dentry *old_file, struct inode *inode,
+	      struct dentry *direntry)
+{
+	int rc = -EACCES;
+	unsigned int xid;
+	const char *from_name, *to_name;
+	void *page1, *page2;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct tcon_link *tlink;
+	struct cifs_tcon *tcon;
+	struct TCP_Server_Info *server;
+	struct cifsInodeInfo *cifsInode;
+
+	if (unlikely(cifs_forced_shutdown(cifs_sb)))
+		return -EIO;
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+	tcon = tlink_tcon(tlink);
+
+	xid = get_xid();
+	page1 = alloc_dentry_path();
+	page2 = alloc_dentry_path();
+
+	from_name = build_path_from_dentry(old_file, page1);
+	if (IS_ERR(from_name)) {
+		rc = PTR_ERR(from_name);
+		goto cifs_hl_exit;
+	}
+	to_name = build_path_from_dentry(direntry, page2);
+	if (IS_ERR(to_name)) {
+		rc = PTR_ERR(to_name);
+		goto cifs_hl_exit;
+	}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	if (tcon->unix_ext)
+		rc = CIFSUnixCreateHardLink(xid, tcon, from_name, to_name,
+					    cifs_sb->local_nls,
+					    cifs_remap(cifs_sb));
+	else {
+#else
+	{
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+		server = tcon->ses->server;
+		if (!server->ops->create_hardlink) {
+			rc = -ENOSYS;
+			goto cifs_hl_exit;
+		}
+		rc = server->ops->create_hardlink(xid, tcon, from_name, to_name,
+						  cifs_sb);
+		if ((rc == -EIO) || (rc == -EINVAL))
+			rc = -EOPNOTSUPP;
+	}
+
+	d_drop(direntry);	/* force new lookup from server of target */
+
+	/*
+	 * if source file is cached (oplocked) revalidate will not go to server
+	 * until the file is closed or oplock broken so update nlinks locally
+	 */
+	if (d_really_is_positive(old_file)) {
+		cifsInode = CIFS_I(d_inode(old_file));
+		if (rc == 0) {
+			spin_lock(&d_inode(old_file)->i_lock);
+			inc_nlink(d_inode(old_file));
+			spin_unlock(&d_inode(old_file)->i_lock);
+
+			/*
+			 * parent dir timestamps will update from srv within a
+			 * second, would it really be worth it to set the parent
+			 * dir cifs inode time to zero to force revalidate
+			 * (faster) for it too?
+			 */
+		}
+		/*
+		 * if not oplocked will force revalidate to get info on source
+		 * file from srv.  Note Samba server prior to 4.2 has bug -
+		 * not updating src file ctime on hardlinks but Windows servers
+		 * handle it properly
+		 */
+		cifsInode->time = 0;
+
+		/*
+		 * Will update parent dir timestamps from srv within a second.
+		 * Would it really be worth it to set the parent dir (cifs
+		 * inode) time field to zero to force revalidate on parent
+		 * directory faster ie
+		 *
+		 * CIFS_I(inode)->time = 0;
+		 */
+	}
+
+cifs_hl_exit:
+	free_dentry_path(page1);
+	free_dentry_path(page2);
+	free_xid(xid);
+	cifs_put_tlink(tlink);
+	return rc;
+}
+
+int
+cifs_symlink(struct mnt_idmap *idmap, struct inode *inode,
+	     struct dentry *direntry, const char *symname)
+{
+	int rc = -EOPNOTSUPP;
+	unsigned int xid;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct tcon_link *tlink;
+	struct cifs_tcon *pTcon;
+	const char *full_path;
+	void *page;
+	struct inode *newinode = NULL;
+
+	if (unlikely(cifs_forced_shutdown(cifs_sb)))
+		return -EIO;
+
+	page = alloc_dentry_path();
+	if (!page)
+		return -ENOMEM;
+
+	xid = get_xid();
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink)) {
+		rc = PTR_ERR(tlink);
+		goto symlink_exit;
+	}
+	pTcon = tlink_tcon(tlink);
+
+	full_path = build_path_from_dentry(direntry, page);
+	if (IS_ERR(full_path)) {
+		rc = PTR_ERR(full_path);
+		goto symlink_exit;
+	}
+
+	cifs_dbg(FYI, "Full path: %s\n", full_path);
+	cifs_dbg(FYI, "symname is %s\n", symname);
+
+	/* BB what if DFS and this volume is on different share? BB */
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
+		rc = create_mf_symlink(xid, pTcon, cifs_sb, full_path, symname);
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+	else if (pTcon->unix_ext)
+		rc = CIFSUnixCreateSymLink(xid, pTcon, full_path, symname,
+					   cifs_sb->local_nls,
+					   cifs_remap(cifs_sb));
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+	/* else
+	   rc = CIFSCreateReparseSymLink(xid, pTcon, fromName, toName,
+					cifs_sb_target->local_nls); */
+
+	if (rc == 0) {
+		if (pTcon->posix_extensions)
+			rc = smb311_posix_get_inode_info(&newinode, full_path, inode->i_sb, xid);
+		else if (pTcon->unix_ext)
+			rc = cifs_get_inode_info_unix(&newinode, full_path,
+						      inode->i_sb, xid);
+		else
+			rc = cifs_get_inode_info(&newinode, full_path, NULL,
+						 inode->i_sb, xid, NULL);
+
+		if (rc != 0) {
+			cifs_dbg(FYI, "Create symlink ok, getinodeinfo fail rc = %d\n",
+				 rc);
+		} else {
+			d_instantiate(direntry, newinode);
+		}
+	}
+symlink_exit:
+	free_dentry_path(page);
+	cifs_put_tlink(tlink);
+	free_xid(xid);
+	return rc;
+}
diff --git a/fs/smb/client/misc.c b/fs/smb/client/misc.c
new file mode 100644
index 0000000000..c2137ea3c2
--- /dev/null
+++ b/fs/smb/client/misc.c
@@ -0,0 +1,1360 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *
+ *   Copyright (C) International Business Machines  Corp., 2002,2008
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ */
+
+#include <linux/slab.h>
+#include <linux/ctype.h>
+#include <linux/mempool.h>
+#include <linux/vmalloc.h>
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "smberr.h"
+#include "nterr.h"
+#include "cifs_unicode.h"
+#include "smb2pdu.h"
+#include "cifsfs.h"
+#ifdef CONFIG_CIFS_DFS_UPCALL
+#include "dns_resolve.h"
+#include "dfs_cache.h"
+#include "dfs.h"
+#endif
+#include "fs_context.h"
+#include "cached_dir.h"
+
+extern mempool_t *cifs_sm_req_poolp;
+extern mempool_t *cifs_req_poolp;
+
+/* The xid serves as a useful identifier for each incoming vfs request,
+   in a similar way to the mid which is useful to track each sent smb,
+   and CurrentXid can also provide a running counter (although it
+   will eventually wrap past zero) of the total vfs operations handled
+   since the cifs fs was mounted */
+
+unsigned int
+_get_xid(void)
+{
+	unsigned int xid;
+
+	spin_lock(&GlobalMid_Lock);
+	GlobalTotalActiveXid++;
+
+	/* keep high water mark for number of simultaneous ops in filesystem */
+	if (GlobalTotalActiveXid > GlobalMaxActiveXid)
+		GlobalMaxActiveXid = GlobalTotalActiveXid;
+	if (GlobalTotalActiveXid > 65000)
+		cifs_dbg(FYI, "warning: more than 65000 requests active\n");
+	xid = GlobalCurrentXid++;
+	spin_unlock(&GlobalMid_Lock);
+	return xid;
+}
+
+void
+_free_xid(unsigned int xid)
+{
+	spin_lock(&GlobalMid_Lock);
+	/* if (GlobalTotalActiveXid == 0)
+		BUG(); */
+	GlobalTotalActiveXid--;
+	spin_unlock(&GlobalMid_Lock);
+}
+
+struct cifs_ses *
+sesInfoAlloc(void)
+{
+	struct cifs_ses *ret_buf;
+
+	ret_buf = kzalloc(sizeof(struct cifs_ses), GFP_KERNEL);
+	if (ret_buf) {
+		atomic_inc(&sesInfoAllocCount);
+		spin_lock_init(&ret_buf->ses_lock);
+		ret_buf->ses_status = SES_NEW;
+		++ret_buf->ses_count;
+		INIT_LIST_HEAD(&ret_buf->smb_ses_list);
+		INIT_LIST_HEAD(&ret_buf->tcon_list);
+		mutex_init(&ret_buf->session_mutex);
+		spin_lock_init(&ret_buf->iface_lock);
+		INIT_LIST_HEAD(&ret_buf->iface_list);
+		spin_lock_init(&ret_buf->chan_lock);
+	}
+	return ret_buf;
+}
+
+void
+sesInfoFree(struct cifs_ses *buf_to_free)
+{
+	struct cifs_server_iface *iface = NULL, *niface = NULL;
+
+	if (buf_to_free == NULL) {
+		cifs_dbg(FYI, "Null buffer passed to sesInfoFree\n");
+		return;
+	}
+
+	unload_nls(buf_to_free->local_nls);
+	atomic_dec(&sesInfoAllocCount);
+	kfree(buf_to_free->serverOS);
+	kfree(buf_to_free->serverDomain);
+	kfree(buf_to_free->serverNOS);
+	kfree_sensitive(buf_to_free->password);
+	kfree(buf_to_free->user_name);
+	kfree(buf_to_free->domainName);
+	kfree_sensitive(buf_to_free->auth_key.response);
+	spin_lock(&buf_to_free->iface_lock);
+	list_for_each_entry_safe(iface, niface, &buf_to_free->iface_list,
+				 iface_head)
+		kref_put(&iface->refcount, release_iface);
+	spin_unlock(&buf_to_free->iface_lock);
+	kfree_sensitive(buf_to_free);
+}
+
+struct cifs_tcon *
+tcon_info_alloc(bool dir_leases_enabled)
+{
+	struct cifs_tcon *ret_buf;
+
+	ret_buf = kzalloc(sizeof(*ret_buf), GFP_KERNEL);
+	if (!ret_buf)
+		return NULL;
+
+	if (dir_leases_enabled == true) {
+		ret_buf->cfids = init_cached_dirs();
+		if (!ret_buf->cfids) {
+			kfree(ret_buf);
+			return NULL;
+		}
+	}
+	/* else ret_buf->cfids is already set to NULL above */
+
+	atomic_inc(&tconInfoAllocCount);
+	ret_buf->status = TID_NEW;
+	++ret_buf->tc_count;
+	spin_lock_init(&ret_buf->tc_lock);
+	INIT_LIST_HEAD(&ret_buf->openFileList);
+	INIT_LIST_HEAD(&ret_buf->tcon_list);
+	spin_lock_init(&ret_buf->open_file_lock);
+	spin_lock_init(&ret_buf->stat_lock);
+	atomic_set(&ret_buf->num_local_opens, 0);
+	atomic_set(&ret_buf->num_remote_opens, 0);
+#ifdef CONFIG_CIFS_DFS_UPCALL
+	INIT_LIST_HEAD(&ret_buf->dfs_ses_list);
+#endif
+
+	return ret_buf;
+}
+
+void
+tconInfoFree(struct cifs_tcon *tcon)
+{
+	if (tcon == NULL) {
+		cifs_dbg(FYI, "Null buffer passed to tconInfoFree\n");
+		return;
+	}
+	free_cached_dirs(tcon->cfids);
+	atomic_dec(&tconInfoAllocCount);
+	kfree(tcon->nativeFileSystem);
+	kfree_sensitive(tcon->password);
+#ifdef CONFIG_CIFS_DFS_UPCALL
+	dfs_put_root_smb_sessions(&tcon->dfs_ses_list);
+#endif
+	kfree(tcon->origin_fullpath);
+	kfree(tcon);
+}
+
+struct smb_hdr *
+cifs_buf_get(void)
+{
+	struct smb_hdr *ret_buf = NULL;
+	/*
+	 * SMB2 header is bigger than CIFS one - no problems to clean some
+	 * more bytes for CIFS.
+	 */
+	size_t buf_size = sizeof(struct smb2_hdr);
+
+	/*
+	 * We could use negotiated size instead of max_msgsize -
+	 * but it may be more efficient to always alloc same size
+	 * albeit slightly larger than necessary and maxbuffersize
+	 * defaults to this and can not be bigger.
+	 */
+	ret_buf = mempool_alloc(cifs_req_poolp, GFP_NOFS);
+
+	/* clear the first few header bytes */
+	/* for most paths, more is cleared in header_assemble */
+	memset(ret_buf, 0, buf_size + 3);
+	atomic_inc(&buf_alloc_count);
+#ifdef CONFIG_CIFS_STATS2
+	atomic_inc(&total_buf_alloc_count);
+#endif /* CONFIG_CIFS_STATS2 */
+
+	return ret_buf;
+}
+
+void
+cifs_buf_release(void *buf_to_free)
+{
+	if (buf_to_free == NULL) {
+		/* cifs_dbg(FYI, "Null buffer passed to cifs_buf_release\n");*/
+		return;
+	}
+	mempool_free(buf_to_free, cifs_req_poolp);
+
+	atomic_dec(&buf_alloc_count);
+	return;
+}
+
+struct smb_hdr *
+cifs_small_buf_get(void)
+{
+	struct smb_hdr *ret_buf = NULL;
+
+/* We could use negotiated size instead of max_msgsize -
+   but it may be more efficient to always alloc same size
+   albeit slightly larger than necessary and maxbuffersize
+   defaults to this and can not be bigger */
+	ret_buf = mempool_alloc(cifs_sm_req_poolp, GFP_NOFS);
+	/* No need to clear memory here, cleared in header assemble */
+	/*	memset(ret_buf, 0, sizeof(struct smb_hdr) + 27);*/
+	atomic_inc(&small_buf_alloc_count);
+#ifdef CONFIG_CIFS_STATS2
+	atomic_inc(&total_small_buf_alloc_count);
+#endif /* CONFIG_CIFS_STATS2 */
+
+	return ret_buf;
+}
+
+void
+cifs_small_buf_release(void *buf_to_free)
+{
+
+	if (buf_to_free == NULL) {
+		cifs_dbg(FYI, "Null buffer passed to cifs_small_buf_release\n");
+		return;
+	}
+	mempool_free(buf_to_free, cifs_sm_req_poolp);
+
+	atomic_dec(&small_buf_alloc_count);
+	return;
+}
+
+void
+free_rsp_buf(int resp_buftype, void *rsp)
+{
+	if (resp_buftype == CIFS_SMALL_BUFFER)
+		cifs_small_buf_release(rsp);
+	else if (resp_buftype == CIFS_LARGE_BUFFER)
+		cifs_buf_release(rsp);
+}
+
+/* NB: MID can not be set if treeCon not passed in, in that
+   case it is responsbility of caller to set the mid */
+void
+header_assemble(struct smb_hdr *buffer, char smb_command /* command */ ,
+		const struct cifs_tcon *treeCon, int word_count
+		/* length of fixed section (word count) in two byte units  */)
+{
+	char *temp = (char *) buffer;
+
+	memset(temp, 0, 256); /* bigger than MAX_CIFS_HDR_SIZE */
+
+	buffer->smb_buf_length = cpu_to_be32(
+	    (2 * word_count) + sizeof(struct smb_hdr) -
+	    4 /*  RFC 1001 length field does not count */  +
+	    2 /* for bcc field itself */) ;
+
+	buffer->Protocol[0] = 0xFF;
+	buffer->Protocol[1] = 'S';
+	buffer->Protocol[2] = 'M';
+	buffer->Protocol[3] = 'B';
+	buffer->Command = smb_command;
+	buffer->Flags = 0x00;	/* case sensitive */
+	buffer->Flags2 = SMBFLG2_KNOWS_LONG_NAMES;
+	buffer->Pid = cpu_to_le16((__u16)current->tgid);
+	buffer->PidHigh = cpu_to_le16((__u16)(current->tgid >> 16));
+	if (treeCon) {
+		buffer->Tid = treeCon->tid;
+		if (treeCon->ses) {
+			if (treeCon->ses->capabilities & CAP_UNICODE)
+				buffer->Flags2 |= SMBFLG2_UNICODE;
+			if (treeCon->ses->capabilities & CAP_STATUS32)
+				buffer->Flags2 |= SMBFLG2_ERR_STATUS;
+
+			/* Uid is not converted */
+			buffer->Uid = treeCon->ses->Suid;
+			if (treeCon->ses->server)
+				buffer->Mid = get_next_mid(treeCon->ses->server);
+		}
+		if (treeCon->Flags & SMB_SHARE_IS_IN_DFS)
+			buffer->Flags2 |= SMBFLG2_DFS;
+		if (treeCon->nocase)
+			buffer->Flags  |= SMBFLG_CASELESS;
+		if ((treeCon->ses) && (treeCon->ses->server))
+			if (treeCon->ses->server->sign)
+				buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
+	}
+
+/*  endian conversion of flags is now done just before sending */
+	buffer->WordCount = (char) word_count;
+	return;
+}
+
+static int
+check_smb_hdr(struct smb_hdr *smb)
+{
+	/* does it have the right SMB "signature" ? */
+	if (*(__le32 *) smb->Protocol != cpu_to_le32(0x424d53ff)) {
+		cifs_dbg(VFS, "Bad protocol string signature header 0x%x\n",
+			 *(unsigned int *)smb->Protocol);
+		return 1;
+	}
+
+	/* if it's a response then accept */
+	if (smb->Flags & SMBFLG_RESPONSE)
+		return 0;
+
+	/* only one valid case where server sends us request */
+	if (smb->Command == SMB_COM_LOCKING_ANDX)
+		return 0;
+
+	cifs_dbg(VFS, "Server sent request, not response. mid=%u\n",
+		 get_mid(smb));
+	return 1;
+}
+
+int
+checkSMB(char *buf, unsigned int total_read, struct TCP_Server_Info *server)
+{
+	struct smb_hdr *smb = (struct smb_hdr *)buf;
+	__u32 rfclen = be32_to_cpu(smb->smb_buf_length);
+	__u32 clc_len;  /* calculated length */
+	cifs_dbg(FYI, "checkSMB Length: 0x%x, smb_buf_length: 0x%x\n",
+		 total_read, rfclen);
+
+	/* is this frame too small to even get to a BCC? */
+	if (total_read < 2 + sizeof(struct smb_hdr)) {
+		if ((total_read >= sizeof(struct smb_hdr) - 1)
+			    && (smb->Status.CifsError != 0)) {
+			/* it's an error return */
+			smb->WordCount = 0;
+			/* some error cases do not return wct and bcc */
+			return 0;
+		} else if ((total_read == sizeof(struct smb_hdr) + 1) &&
+				(smb->WordCount == 0)) {
+			char *tmp = (char *)smb;
+			/* Need to work around a bug in two servers here */
+			/* First, check if the part of bcc they sent was zero */
+			if (tmp[sizeof(struct smb_hdr)] == 0) {
+				/* some servers return only half of bcc
+				 * on simple responses (wct, bcc both zero)
+				 * in particular have seen this on
+				 * ulogoffX and FindClose. This leaves
+				 * one byte of bcc potentially unitialized
+				 */
+				/* zero rest of bcc */
+				tmp[sizeof(struct smb_hdr)+1] = 0;
+				return 0;
+			}
+			cifs_dbg(VFS, "rcvd invalid byte count (bcc)\n");
+		} else {
+			cifs_dbg(VFS, "Length less than smb header size\n");
+		}
+		return -EIO;
+	} else if (total_read < sizeof(*smb) + 2 * smb->WordCount) {
+		cifs_dbg(VFS, "%s: can't read BCC due to invalid WordCount(%u)\n",
+			 __func__, smb->WordCount);
+		return -EIO;
+	}
+
+	/* otherwise, there is enough to get to the BCC */
+	if (check_smb_hdr(smb))
+		return -EIO;
+	clc_len = smbCalcSize(smb);
+
+	if (4 + rfclen != total_read) {
+		cifs_dbg(VFS, "Length read does not match RFC1001 length %d\n",
+			 rfclen);
+		return -EIO;
+	}
+
+	if (4 + rfclen != clc_len) {
+		__u16 mid = get_mid(smb);
+		/* check if bcc wrapped around for large read responses */
+		if ((rfclen > 64 * 1024) && (rfclen > clc_len)) {
+			/* check if lengths match mod 64K */
+			if (((4 + rfclen) & 0xFFFF) == (clc_len & 0xFFFF))
+				return 0; /* bcc wrapped */
+		}
+		cifs_dbg(FYI, "Calculated size %u vs length %u mismatch for mid=%u\n",
+			 clc_len, 4 + rfclen, mid);
+
+		if (4 + rfclen < clc_len) {
+			cifs_dbg(VFS, "RFC1001 size %u smaller than SMB for mid=%u\n",
+				 rfclen, mid);
+			return -EIO;
+		} else if (rfclen > clc_len + 512) {
+			/*
+			 * Some servers (Windows XP in particular) send more
+			 * data than the lengths in the SMB packet would
+			 * indicate on certain calls (byte range locks and
+			 * trans2 find first calls in particular). While the
+			 * client can handle such a frame by ignoring the
+			 * trailing data, we choose limit the amount of extra
+			 * data to 512 bytes.
+			 */
+			cifs_dbg(VFS, "RFC1001 size %u more than 512 bytes larger than SMB for mid=%u\n",
+				 rfclen, mid);
+			return -EIO;
+		}
+	}
+	return 0;
+}
+
+bool
+is_valid_oplock_break(char *buffer, struct TCP_Server_Info *srv)
+{
+	struct smb_hdr *buf = (struct smb_hdr *)buffer;
+	struct smb_com_lock_req *pSMB = (struct smb_com_lock_req *)buf;
+	struct TCP_Server_Info *pserver;
+	struct cifs_ses *ses;
+	struct cifs_tcon *tcon;
+	struct cifsInodeInfo *pCifsInode;
+	struct cifsFileInfo *netfile;
+
+	cifs_dbg(FYI, "Checking for oplock break or dnotify response\n");
+	if ((pSMB->hdr.Command == SMB_COM_NT_TRANSACT) &&
+	   (pSMB->hdr.Flags & SMBFLG_RESPONSE)) {
+		struct smb_com_transaction_change_notify_rsp *pSMBr =
+			(struct smb_com_transaction_change_notify_rsp *)buf;
+		struct file_notify_information *pnotify;
+		__u32 data_offset = 0;
+		size_t len = srv->total_read - sizeof(pSMBr->hdr.smb_buf_length);
+
+		if (get_bcc(buf) > sizeof(struct file_notify_information)) {
+			data_offset = le32_to_cpu(pSMBr->DataOffset);
+
+			if (data_offset >
+			    len - sizeof(struct file_notify_information)) {
+				cifs_dbg(FYI, "Invalid data_offset %u\n",
+					 data_offset);
+				return true;
+			}
+			pnotify = (struct file_notify_information *)
+				((char *)&pSMBr->hdr.Protocol + data_offset);
+			cifs_dbg(FYI, "dnotify on %s Action: 0x%x\n",
+				 pnotify->FileName, pnotify->Action);
+			/*   cifs_dump_mem("Rcvd notify Data: ",buf,
+				sizeof(struct smb_hdr)+60); */
+			return true;
+		}
+		if (pSMBr->hdr.Status.CifsError) {
+			cifs_dbg(FYI, "notify err 0x%x\n",
+				 pSMBr->hdr.Status.CifsError);
+			return true;
+		}
+		return false;
+	}
+	if (pSMB->hdr.Command != SMB_COM_LOCKING_ANDX)
+		return false;
+	if (pSMB->hdr.Flags & SMBFLG_RESPONSE) {
+		/* no sense logging error on invalid handle on oplock
+		   break - harmless race between close request and oplock
+		   break response is expected from time to time writing out
+		   large dirty files cached on the client */
+		if ((NT_STATUS_INVALID_HANDLE) ==
+		   le32_to_cpu(pSMB->hdr.Status.CifsError)) {
+			cifs_dbg(FYI, "Invalid handle on oplock break\n");
+			return true;
+		} else if (ERRbadfid ==
+		   le16_to_cpu(pSMB->hdr.Status.DosError.Error)) {
+			return true;
+		} else {
+			return false; /* on valid oplock brk we get "request" */
+		}
+	}
+	if (pSMB->hdr.WordCount != 8)
+		return false;
+
+	cifs_dbg(FYI, "oplock type 0x%x level 0x%x\n",
+		 pSMB->LockType, pSMB->OplockLevel);
+	if (!(pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE))
+		return false;
+
+	/* If server is a channel, select the primary channel */
+	pserver = SERVER_IS_CHAN(srv) ? srv->primary_server : srv;
+
+	/* look up tcon based on tid & uid */
+	spin_lock(&cifs_tcp_ses_lock);
+	list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
+		list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
+			if (tcon->tid != buf->Tid)
+				continue;
+
+			cifs_stats_inc(&tcon->stats.cifs_stats.num_oplock_brks);
+			spin_lock(&tcon->open_file_lock);
+			list_for_each_entry(netfile, &tcon->openFileList, tlist) {
+				if (pSMB->Fid != netfile->fid.netfid)
+					continue;
+
+				cifs_dbg(FYI, "file id match, oplock break\n");
+				pCifsInode = CIFS_I(d_inode(netfile->dentry));
+
+				set_bit(CIFS_INODE_PENDING_OPLOCK_BREAK,
+					&pCifsInode->flags);
+
+				netfile->oplock_epoch = 0;
+				netfile->oplock_level = pSMB->OplockLevel;
+				netfile->oplock_break_cancelled = false;
+				cifs_queue_oplock_break(netfile);
+
+				spin_unlock(&tcon->open_file_lock);
+				spin_unlock(&cifs_tcp_ses_lock);
+				return true;
+			}
+			spin_unlock(&tcon->open_file_lock);
+			spin_unlock(&cifs_tcp_ses_lock);
+			cifs_dbg(FYI, "No matching file for oplock break\n");
+			return true;
+		}
+	}
+	spin_unlock(&cifs_tcp_ses_lock);
+	cifs_dbg(FYI, "Can not process oplock break for non-existent connection\n");
+	return true;
+}
+
+void
+dump_smb(void *buf, int smb_buf_length)
+{
+	if (traceSMB == 0)
+		return;
+
+	print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_NONE, 8, 2, buf,
+		       smb_buf_length, true);
+}
+
+void
+cifs_autodisable_serverino(struct cifs_sb_info *cifs_sb)
+{
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
+		struct cifs_tcon *tcon = NULL;
+
+		if (cifs_sb->master_tlink)
+			tcon = cifs_sb_master_tcon(cifs_sb);
+
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
+		cifs_sb->mnt_cifs_serverino_autodisabled = true;
+		cifs_dbg(VFS, "Autodisabling the use of server inode numbers on %s\n",
+			 tcon ? tcon->tree_name : "new server");
+		cifs_dbg(VFS, "The server doesn't seem to support them properly or the files might be on different servers (DFS)\n");
+		cifs_dbg(VFS, "Hardlinks will not be recognized on this mount. Consider mounting with the \"noserverino\" option to silence this message.\n");
+
+	}
+}
+
+void cifs_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock)
+{
+	oplock &= 0xF;
+
+	if (oplock == OPLOCK_EXCLUSIVE) {
+		cinode->oplock = CIFS_CACHE_WRITE_FLG | CIFS_CACHE_READ_FLG;
+		cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
+			 &cinode->netfs.inode);
+	} else if (oplock == OPLOCK_READ) {
+		cinode->oplock = CIFS_CACHE_READ_FLG;
+		cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
+			 &cinode->netfs.inode);
+	} else
+		cinode->oplock = 0;
+}
+
+/*
+ * We wait for oplock breaks to be processed before we attempt to perform
+ * writes.
+ */
+int cifs_get_writer(struct cifsInodeInfo *cinode)
+{
+	int rc;
+
+start:
+	rc = wait_on_bit(&cinode->flags, CIFS_INODE_PENDING_OPLOCK_BREAK,
+			 TASK_KILLABLE);
+	if (rc)
+		return rc;
+
+	spin_lock(&cinode->writers_lock);
+	if (!cinode->writers)
+		set_bit(CIFS_INODE_PENDING_WRITERS, &cinode->flags);
+	cinode->writers++;
+	/* Check to see if we have started servicing an oplock break */
+	if (test_bit(CIFS_INODE_PENDING_OPLOCK_BREAK, &cinode->flags)) {
+		cinode->writers--;
+		if (cinode->writers == 0) {
+			clear_bit(CIFS_INODE_PENDING_WRITERS, &cinode->flags);
+			wake_up_bit(&cinode->flags, CIFS_INODE_PENDING_WRITERS);
+		}
+		spin_unlock(&cinode->writers_lock);
+		goto start;
+	}
+	spin_unlock(&cinode->writers_lock);
+	return 0;
+}
+
+void cifs_put_writer(struct cifsInodeInfo *cinode)
+{
+	spin_lock(&cinode->writers_lock);
+	cinode->writers--;
+	if (cinode->writers == 0) {
+		clear_bit(CIFS_INODE_PENDING_WRITERS, &cinode->flags);
+		wake_up_bit(&cinode->flags, CIFS_INODE_PENDING_WRITERS);
+	}
+	spin_unlock(&cinode->writers_lock);
+}
+
+/**
+ * cifs_queue_oplock_break - queue the oplock break handler for cfile
+ * @cfile: The file to break the oplock on
+ *
+ * This function is called from the demultiplex thread when it
+ * receives an oplock break for @cfile.
+ *
+ * Assumes the tcon->open_file_lock is held.
+ * Assumes cfile->file_info_lock is NOT held.
+ */
+void cifs_queue_oplock_break(struct cifsFileInfo *cfile)
+{
+	/*
+	 * Bump the handle refcount now while we hold the
+	 * open_file_lock to enforce the validity of it for the oplock
+	 * break handler. The matching put is done at the end of the
+	 * handler.
+	 */
+	cifsFileInfo_get(cfile);
+
+	queue_work(cifsoplockd_wq, &cfile->oplock_break);
+}
+
+void cifs_done_oplock_break(struct cifsInodeInfo *cinode)
+{
+	clear_bit(CIFS_INODE_PENDING_OPLOCK_BREAK, &cinode->flags);
+	wake_up_bit(&cinode->flags, CIFS_INODE_PENDING_OPLOCK_BREAK);
+}
+
+bool
+backup_cred(struct cifs_sb_info *cifs_sb)
+{
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID) {
+		if (uid_eq(cifs_sb->ctx->backupuid, current_fsuid()))
+			return true;
+	}
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID) {
+		if (in_group_p(cifs_sb->ctx->backupgid))
+			return true;
+	}
+
+	return false;
+}
+
+void
+cifs_del_pending_open(struct cifs_pending_open *open)
+{
+	spin_lock(&tlink_tcon(open->tlink)->open_file_lock);
+	list_del(&open->olist);
+	spin_unlock(&tlink_tcon(open->tlink)->open_file_lock);
+}
+
+void
+cifs_add_pending_open_locked(struct cifs_fid *fid, struct tcon_link *tlink,
+			     struct cifs_pending_open *open)
+{
+	memcpy(open->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
+	open->oplock = CIFS_OPLOCK_NO_CHANGE;
+	open->tlink = tlink;
+	fid->pending_open = open;
+	list_add_tail(&open->olist, &tlink_tcon(tlink)->pending_opens);
+}
+
+void
+cifs_add_pending_open(struct cifs_fid *fid, struct tcon_link *tlink,
+		      struct cifs_pending_open *open)
+{
+	spin_lock(&tlink_tcon(tlink)->open_file_lock);
+	cifs_add_pending_open_locked(fid, tlink, open);
+	spin_unlock(&tlink_tcon(open->tlink)->open_file_lock);
+}
+
+/*
+ * Critical section which runs after acquiring deferred_lock.
+ * As there is no reference count on cifs_deferred_close, pdclose
+ * should not be used outside deferred_lock.
+ */
+bool
+cifs_is_deferred_close(struct cifsFileInfo *cfile, struct cifs_deferred_close **pdclose)
+{
+	struct cifs_deferred_close *dclose;
+
+	list_for_each_entry(dclose, &CIFS_I(d_inode(cfile->dentry))->deferred_closes, dlist) {
+		if ((dclose->netfid == cfile->fid.netfid) &&
+			(dclose->persistent_fid == cfile->fid.persistent_fid) &&
+			(dclose->volatile_fid == cfile->fid.volatile_fid)) {
+			*pdclose = dclose;
+			return true;
+		}
+	}
+	return false;
+}
+
+/*
+ * Critical section which runs after acquiring deferred_lock.
+ */
+void
+cifs_add_deferred_close(struct cifsFileInfo *cfile, struct cifs_deferred_close *dclose)
+{
+	bool is_deferred = false;
+	struct cifs_deferred_close *pdclose;
+
+	is_deferred = cifs_is_deferred_close(cfile, &pdclose);
+	if (is_deferred) {
+		kfree(dclose);
+		return;
+	}
+
+	dclose->tlink = cfile->tlink;
+	dclose->netfid = cfile->fid.netfid;
+	dclose->persistent_fid = cfile->fid.persistent_fid;
+	dclose->volatile_fid = cfile->fid.volatile_fid;
+	list_add_tail(&dclose->dlist, &CIFS_I(d_inode(cfile->dentry))->deferred_closes);
+}
+
+/*
+ * Critical section which runs after acquiring deferred_lock.
+ */
+void
+cifs_del_deferred_close(struct cifsFileInfo *cfile)
+{
+	bool is_deferred = false;
+	struct cifs_deferred_close *dclose;
+
+	is_deferred = cifs_is_deferred_close(cfile, &dclose);
+	if (!is_deferred)
+		return;
+	list_del(&dclose->dlist);
+	kfree(dclose);
+}
+
+void
+cifs_close_deferred_file(struct cifsInodeInfo *cifs_inode)
+{
+	struct cifsFileInfo *cfile = NULL;
+	struct file_list *tmp_list, *tmp_next_list;
+	struct list_head file_head;
+
+	if (cifs_inode == NULL)
+		return;
+
+	INIT_LIST_HEAD(&file_head);
+	spin_lock(&cifs_inode->open_file_lock);
+	list_for_each_entry(cfile, &cifs_inode->openFileList, flist) {
+		if (delayed_work_pending(&cfile->deferred)) {
+			if (cancel_delayed_work(&cfile->deferred)) {
+				spin_lock(&cifs_inode->deferred_lock);
+				cifs_del_deferred_close(cfile);
+				spin_unlock(&cifs_inode->deferred_lock);
+
+				tmp_list = kmalloc(sizeof(struct file_list), GFP_ATOMIC);
+				if (tmp_list == NULL)
+					break;
+				tmp_list->cfile = cfile;
+				list_add_tail(&tmp_list->list, &file_head);
+			}
+		}
+	}
+	spin_unlock(&cifs_inode->open_file_lock);
+
+	list_for_each_entry_safe(tmp_list, tmp_next_list, &file_head, list) {
+		_cifsFileInfo_put(tmp_list->cfile, false, false);
+		list_del(&tmp_list->list);
+		kfree(tmp_list);
+	}
+}
+
+void
+cifs_close_all_deferred_files(struct cifs_tcon *tcon)
+{
+	struct cifsFileInfo *cfile;
+	struct file_list *tmp_list, *tmp_next_list;
+	struct list_head file_head;
+
+	INIT_LIST_HEAD(&file_head);
+	spin_lock(&tcon->open_file_lock);
+	list_for_each_entry(cfile, &tcon->openFileList, tlist) {
+		if (delayed_work_pending(&cfile->deferred)) {
+			if (cancel_delayed_work(&cfile->deferred)) {
+				spin_lock(&CIFS_I(d_inode(cfile->dentry))->deferred_lock);
+				cifs_del_deferred_close(cfile);
+				spin_unlock(&CIFS_I(d_inode(cfile->dentry))->deferred_lock);
+
+				tmp_list = kmalloc(sizeof(struct file_list), GFP_ATOMIC);
+				if (tmp_list == NULL)
+					break;
+				tmp_list->cfile = cfile;
+				list_add_tail(&tmp_list->list, &file_head);
+			}
+		}
+	}
+	spin_unlock(&tcon->open_file_lock);
+
+	list_for_each_entry_safe(tmp_list, tmp_next_list, &file_head, list) {
+		_cifsFileInfo_put(tmp_list->cfile, true, false);
+		list_del(&tmp_list->list);
+		kfree(tmp_list);
+	}
+}
+void
+cifs_close_deferred_file_under_dentry(struct cifs_tcon *tcon, const char *path)
+{
+	struct cifsFileInfo *cfile;
+	struct file_list *tmp_list, *tmp_next_list;
+	struct list_head file_head;
+	void *page;
+	const char *full_path;
+
+	INIT_LIST_HEAD(&file_head);
+	page = alloc_dentry_path();
+	spin_lock(&tcon->open_file_lock);
+	list_for_each_entry(cfile, &tcon->openFileList, tlist) {
+		full_path = build_path_from_dentry(cfile->dentry, page);
+		if (strstr(full_path, path)) {
+			if (delayed_work_pending(&cfile->deferred)) {
+				if (cancel_delayed_work(&cfile->deferred)) {
+					spin_lock(&CIFS_I(d_inode(cfile->dentry))->deferred_lock);
+					cifs_del_deferred_close(cfile);
+					spin_unlock(&CIFS_I(d_inode(cfile->dentry))->deferred_lock);
+
+					tmp_list = kmalloc(sizeof(struct file_list), GFP_ATOMIC);
+					if (tmp_list == NULL)
+						break;
+					tmp_list->cfile = cfile;
+					list_add_tail(&tmp_list->list, &file_head);
+				}
+			}
+		}
+	}
+	spin_unlock(&tcon->open_file_lock);
+
+	list_for_each_entry_safe(tmp_list, tmp_next_list, &file_head, list) {
+		_cifsFileInfo_put(tmp_list->cfile, true, false);
+		list_del(&tmp_list->list);
+		kfree(tmp_list);
+	}
+	free_dentry_path(page);
+}
+
+/* parses DFS referral V3 structure
+ * caller is responsible for freeing target_nodes
+ * returns:
+ * - on success - 0
+ * - on failure - errno
+ */
+int
+parse_dfs_referrals(struct get_dfs_referral_rsp *rsp, u32 rsp_size,
+		    unsigned int *num_of_nodes,
+		    struct dfs_info3_param **target_nodes,
+		    const struct nls_table *nls_codepage, int remap,
+		    const char *searchName, bool is_unicode)
+{
+	int i, rc = 0;
+	char *data_end;
+	struct dfs_referral_level_3 *ref;
+
+	*num_of_nodes = le16_to_cpu(rsp->NumberOfReferrals);
+
+	if (*num_of_nodes < 1) {
+		cifs_dbg(VFS, "num_referrals: must be at least > 0, but we get num_referrals = %d\n",
+			 *num_of_nodes);
+		rc = -EINVAL;
+		goto parse_DFS_referrals_exit;
+	}
+
+	ref = (struct dfs_referral_level_3 *) &(rsp->referrals);
+	if (ref->VersionNumber != cpu_to_le16(3)) {
+		cifs_dbg(VFS, "Referrals of V%d version are not supported, should be V3\n",
+			 le16_to_cpu(ref->VersionNumber));
+		rc = -EINVAL;
+		goto parse_DFS_referrals_exit;
+	}
+
+	/* get the upper boundary of the resp buffer */
+	data_end = (char *)rsp + rsp_size;
+
+	cifs_dbg(FYI, "num_referrals: %d dfs flags: 0x%x ...\n",
+		 *num_of_nodes, le32_to_cpu(rsp->DFSFlags));
+
+	*target_nodes = kcalloc(*num_of_nodes, sizeof(struct dfs_info3_param),
+				GFP_KERNEL);
+	if (*target_nodes == NULL) {
+		rc = -ENOMEM;
+		goto parse_DFS_referrals_exit;
+	}
+
+	/* collect necessary data from referrals */
+	for (i = 0; i < *num_of_nodes; i++) {
+		char *temp;
+		int max_len;
+		struct dfs_info3_param *node = (*target_nodes)+i;
+
+		node->flags = le32_to_cpu(rsp->DFSFlags);
+		if (is_unicode) {
+			__le16 *tmp = kmalloc(strlen(searchName)*2 + 2,
+						GFP_KERNEL);
+			if (tmp == NULL) {
+				rc = -ENOMEM;
+				goto parse_DFS_referrals_exit;
+			}
+			cifsConvertToUTF16((__le16 *) tmp, searchName,
+					   PATH_MAX, nls_codepage, remap);
+			node->path_consumed = cifs_utf16_bytes(tmp,
+					le16_to_cpu(rsp->PathConsumed),
+					nls_codepage);
+			kfree(tmp);
+		} else
+			node->path_consumed = le16_to_cpu(rsp->PathConsumed);
+
+		node->server_type = le16_to_cpu(ref->ServerType);
+		node->ref_flag = le16_to_cpu(ref->ReferralEntryFlags);
+
+		/* copy DfsPath */
+		temp = (char *)ref + le16_to_cpu(ref->DfsPathOffset);
+		max_len = data_end - temp;
+		node->path_name = cifs_strndup_from_utf16(temp, max_len,
+						is_unicode, nls_codepage);
+		if (!node->path_name) {
+			rc = -ENOMEM;
+			goto parse_DFS_referrals_exit;
+		}
+
+		/* copy link target UNC */
+		temp = (char *)ref + le16_to_cpu(ref->NetworkAddressOffset);
+		max_len = data_end - temp;
+		node->node_name = cifs_strndup_from_utf16(temp, max_len,
+						is_unicode, nls_codepage);
+		if (!node->node_name) {
+			rc = -ENOMEM;
+			goto parse_DFS_referrals_exit;
+		}
+
+		node->ttl = le32_to_cpu(ref->TimeToLive);
+
+		ref++;
+	}
+
+parse_DFS_referrals_exit:
+	if (rc) {
+		free_dfs_info_array(*target_nodes, *num_of_nodes);
+		*target_nodes = NULL;
+		*num_of_nodes = 0;
+	}
+	return rc;
+}
+
+struct cifs_aio_ctx *
+cifs_aio_ctx_alloc(void)
+{
+	struct cifs_aio_ctx *ctx;
+
+	/*
+	 * Must use kzalloc to initialize ctx->bv to NULL and ctx->direct_io
+	 * to false so that we know when we have to unreference pages within
+	 * cifs_aio_ctx_release()
+	 */
+	ctx = kzalloc(sizeof(struct cifs_aio_ctx), GFP_KERNEL);
+	if (!ctx)
+		return NULL;
+
+	INIT_LIST_HEAD(&ctx->list);
+	mutex_init(&ctx->aio_mutex);
+	init_completion(&ctx->done);
+	kref_init(&ctx->refcount);
+	return ctx;
+}
+
+void
+cifs_aio_ctx_release(struct kref *refcount)
+{
+	struct cifs_aio_ctx *ctx = container_of(refcount,
+					struct cifs_aio_ctx, refcount);
+
+	cifsFileInfo_put(ctx->cfile);
+
+	/*
+	 * ctx->bv is only set if setup_aio_ctx_iter() was call successfuly
+	 * which means that iov_iter_extract_pages() was a success and thus
+	 * that we may have references or pins on pages that we need to
+	 * release.
+	 */
+	if (ctx->bv) {
+		if (ctx->should_dirty || ctx->bv_need_unpin) {
+			unsigned int i;
+
+			for (i = 0; i < ctx->nr_pinned_pages; i++) {
+				struct page *page = ctx->bv[i].bv_page;
+
+				if (ctx->should_dirty)
+					set_page_dirty(page);
+				if (ctx->bv_need_unpin)
+					unpin_user_page(page);
+			}
+		}
+		kvfree(ctx->bv);
+	}
+
+	kfree(ctx);
+}
+
+/**
+ * cifs_alloc_hash - allocate hash and hash context together
+ * @name: The name of the crypto hash algo
+ * @sdesc: SHASH descriptor where to put the pointer to the hash TFM
+ *
+ * The caller has to make sure @sdesc is initialized to either NULL or
+ * a valid context. It can be freed via cifs_free_hash().
+ */
+int
+cifs_alloc_hash(const char *name, struct shash_desc **sdesc)
+{
+	int rc = 0;
+	struct crypto_shash *alg = NULL;
+
+	if (*sdesc)
+		return 0;
+
+	alg = crypto_alloc_shash(name, 0, 0);
+	if (IS_ERR(alg)) {
+		cifs_dbg(VFS, "Could not allocate shash TFM '%s'\n", name);
+		rc = PTR_ERR(alg);
+		*sdesc = NULL;
+		return rc;
+	}
+
+	*sdesc = kmalloc(sizeof(struct shash_desc) + crypto_shash_descsize(alg), GFP_KERNEL);
+	if (*sdesc == NULL) {
+		cifs_dbg(VFS, "no memory left to allocate shash TFM '%s'\n", name);
+		crypto_free_shash(alg);
+		return -ENOMEM;
+	}
+
+	(*sdesc)->tfm = alg;
+	return 0;
+}
+
+/**
+ * cifs_free_hash - free hash and hash context together
+ * @sdesc: Where to find the pointer to the hash TFM
+ *
+ * Freeing a NULL descriptor is safe.
+ */
+void
+cifs_free_hash(struct shash_desc **sdesc)
+{
+	if (unlikely(!sdesc) || !*sdesc)
+		return;
+
+	if ((*sdesc)->tfm) {
+		crypto_free_shash((*sdesc)->tfm);
+		(*sdesc)->tfm = NULL;
+	}
+
+	kfree_sensitive(*sdesc);
+	*sdesc = NULL;
+}
+
+void extract_unc_hostname(const char *unc, const char **h, size_t *len)
+{
+	const char *end;
+
+	/* skip initial slashes */
+	while (*unc && (*unc == '\\' || *unc == '/'))
+		unc++;
+
+	end = unc;
+
+	while (*end && !(*end == '\\' || *end == '/'))
+		end++;
+
+	*h = unc;
+	*len = end - unc;
+}
+
+/**
+ * copy_path_name - copy src path to dst, possibly truncating
+ * @dst: The destination buffer
+ * @src: The source name
+ *
+ * returns number of bytes written (including trailing nul)
+ */
+int copy_path_name(char *dst, const char *src)
+{
+	int name_len;
+
+	/*
+	 * PATH_MAX includes nul, so if strlen(src) >= PATH_MAX it
+	 * will truncate and strlen(dst) will be PATH_MAX-1
+	 */
+	name_len = strscpy(dst, src, PATH_MAX);
+	if (WARN_ON_ONCE(name_len < 0))
+		name_len = PATH_MAX-1;
+
+	/* we count the trailing nul */
+	name_len++;
+	return name_len;
+}
+
+struct super_cb_data {
+	void *data;
+	struct super_block *sb;
+};
+
+static void tcon_super_cb(struct super_block *sb, void *arg)
+{
+	struct super_cb_data *sd = arg;
+	struct cifs_sb_info *cifs_sb;
+	struct cifs_tcon *t1 = sd->data, *t2;
+
+	if (sd->sb)
+		return;
+
+	cifs_sb = CIFS_SB(sb);
+	t2 = cifs_sb_master_tcon(cifs_sb);
+
+	spin_lock(&t2->tc_lock);
+	if (t1->ses == t2->ses &&
+	    t1->ses->server == t2->ses->server &&
+	    t2->origin_fullpath &&
+	    dfs_src_pathname_equal(t2->origin_fullpath, t1->origin_fullpath))
+		sd->sb = sb;
+	spin_unlock(&t2->tc_lock);
+}
+
+static struct super_block *__cifs_get_super(void (*f)(struct super_block *, void *),
+					    void *data)
+{
+	struct super_cb_data sd = {
+		.data = data,
+		.sb = NULL,
+	};
+	struct file_system_type **fs_type = (struct file_system_type *[]) {
+		&cifs_fs_type, &smb3_fs_type, NULL,
+	};
+
+	for (; *fs_type; fs_type++) {
+		iterate_supers_type(*fs_type, f, &sd);
+		if (sd.sb) {
+			/*
+			 * Grab an active reference in order to prevent automounts (DFS links)
+			 * of expiring and then freeing up our cifs superblock pointer while
+			 * we're doing failover.
+			 */
+			cifs_sb_active(sd.sb);
+			return sd.sb;
+		}
+	}
+	pr_warn_once("%s: could not find dfs superblock\n", __func__);
+	return ERR_PTR(-EINVAL);
+}
+
+static void __cifs_put_super(struct super_block *sb)
+{
+	if (!IS_ERR_OR_NULL(sb))
+		cifs_sb_deactive(sb);
+}
+
+struct super_block *cifs_get_dfs_tcon_super(struct cifs_tcon *tcon)
+{
+	spin_lock(&tcon->tc_lock);
+	if (!tcon->origin_fullpath) {
+		spin_unlock(&tcon->tc_lock);
+		return ERR_PTR(-ENOENT);
+	}
+	spin_unlock(&tcon->tc_lock);
+	return __cifs_get_super(tcon_super_cb, tcon);
+}
+
+void cifs_put_tcp_super(struct super_block *sb)
+{
+	__cifs_put_super(sb);
+}
+
+#ifdef CONFIG_CIFS_DFS_UPCALL
+int match_target_ip(struct TCP_Server_Info *server,
+		    const char *share, size_t share_len,
+		    bool *result)
+{
+	int rc;
+	char *target;
+	struct sockaddr_storage ss;
+
+	*result = false;
+
+	target = kzalloc(share_len + 3, GFP_KERNEL);
+	if (!target)
+		return -ENOMEM;
+
+	scnprintf(target, share_len + 3, "\\\\%.*s", (int)share_len, share);
+
+	cifs_dbg(FYI, "%s: target name: %s\n", __func__, target + 2);
+
+	rc = dns_resolve_server_name_to_ip(target, (struct sockaddr *)&ss, NULL);
+	kfree(target);
+
+	if (rc < 0)
+		return rc;
+
+	spin_lock(&server->srv_lock);
+	*result = cifs_match_ipaddr((struct sockaddr *)&server->dstaddr, (struct sockaddr *)&ss);
+	spin_unlock(&server->srv_lock);
+	cifs_dbg(FYI, "%s: ip addresses match: %u\n", __func__, *result);
+	return 0;
+}
+
+int cifs_update_super_prepath(struct cifs_sb_info *cifs_sb, char *prefix)
+{
+	int rc;
+
+	kfree(cifs_sb->prepath);
+	cifs_sb->prepath = NULL;
+
+	if (prefix && *prefix) {
+		cifs_sb->prepath = cifs_sanitize_prepath(prefix, GFP_ATOMIC);
+		if (IS_ERR(cifs_sb->prepath)) {
+			rc = PTR_ERR(cifs_sb->prepath);
+			cifs_sb->prepath = NULL;
+			return rc;
+		}
+		if (cifs_sb->prepath)
+			convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb));
+	}
+
+	cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_USE_PREFIX_PATH;
+	return 0;
+}
+
+/*
+ * Handle weird Windows SMB server behaviour. It responds with
+ * STATUS_OBJECT_NAME_INVALID code to SMB2 QUERY_INFO request for
+ * "\<server>\<dfsname>\<linkpath>" DFS reference, where <dfsname> contains
+ * non-ASCII unicode symbols.
+ */
+int cifs_inval_name_dfs_link_error(const unsigned int xid,
+				   struct cifs_tcon *tcon,
+				   struct cifs_sb_info *cifs_sb,
+				   const char *full_path,
+				   bool *islink)
+{
+	struct cifs_ses *ses = tcon->ses;
+	size_t len;
+	char *path;
+	char *ref_path;
+
+	*islink = false;
+
+	/*
+	 * Fast path - skip check when @full_path doesn't have a prefix path to
+	 * look up or tcon is not DFS.
+	 */
+	if (strlen(full_path) < 2 || !cifs_sb ||
+	    (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS) ||
+	    !is_tcon_dfs(tcon))
+		return 0;
+
+	spin_lock(&tcon->tc_lock);
+	if (!tcon->origin_fullpath) {
+		spin_unlock(&tcon->tc_lock);
+		return 0;
+	}
+	spin_unlock(&tcon->tc_lock);
+
+	/*
+	 * Slow path - tcon is DFS and @full_path has prefix path, so attempt
+	 * to get a referral to figure out whether it is an DFS link.
+	 */
+	len = strnlen(tcon->tree_name, MAX_TREE_SIZE + 1) + strlen(full_path) + 1;
+	path = kmalloc(len, GFP_KERNEL);
+	if (!path)
+		return -ENOMEM;
+
+	scnprintf(path, len, "%s%s", tcon->tree_name, full_path);
+	ref_path = dfs_cache_canonical_path(path + 1, cifs_sb->local_nls,
+					    cifs_remap(cifs_sb));
+	kfree(path);
+
+	if (IS_ERR(ref_path)) {
+		if (PTR_ERR(ref_path) != -EINVAL)
+			return PTR_ERR(ref_path);
+	} else {
+		struct dfs_info3_param *refs = NULL;
+		int num_refs = 0;
+
+		/*
+		 * XXX: we are not using dfs_cache_find() here because we might
+		 * end up filling all the DFS cache and thus potentially
+		 * removing cached DFS targets that the client would eventually
+		 * need during failover.
+		 */
+		ses = CIFS_DFS_ROOT_SES(ses);
+		if (ses->server->ops->get_dfs_refer &&
+		    !ses->server->ops->get_dfs_refer(xid, ses, ref_path, &refs,
+						     &num_refs, cifs_sb->local_nls,
+						     cifs_remap(cifs_sb)))
+			*islink = refs[0].server_type == DFS_TYPE_LINK;
+		free_dfs_info_array(refs, num_refs);
+		kfree(ref_path);
+	}
+	return 0;
+}
+#endif
+
+int cifs_wait_for_server_reconnect(struct TCP_Server_Info *server, bool retry)
+{
+	int timeout = 10;
+	int rc;
+
+	spin_lock(&server->srv_lock);
+	if (server->tcpStatus != CifsNeedReconnect) {
+		spin_unlock(&server->srv_lock);
+		return 0;
+	}
+	timeout *= server->nr_targets;
+	spin_unlock(&server->srv_lock);
+
+	/*
+	 * Give demultiplex thread up to 10 seconds to each target available for
+	 * reconnect -- should be greater than cifs socket timeout which is 7
+	 * seconds.
+	 *
+	 * On "soft" mounts we wait once. Hard mounts keep retrying until
+	 * process is killed or server comes back on-line.
+	 */
+	do {
+		rc = wait_event_interruptible_timeout(server->response_q,
+						      (server->tcpStatus != CifsNeedReconnect),
+						      timeout * HZ);
+		if (rc < 0) {
+			cifs_dbg(FYI, "%s: aborting reconnect due to received signal\n",
+				 __func__);
+			return -ERESTARTSYS;
+		}
+
+		/* are we still trying to reconnect? */
+		spin_lock(&server->srv_lock);
+		if (server->tcpStatus != CifsNeedReconnect) {
+			spin_unlock(&server->srv_lock);
+			return 0;
+		}
+		spin_unlock(&server->srv_lock);
+	} while (retry);
+
+	cifs_dbg(FYI, "%s: gave up waiting on reconnect\n", __func__);
+	return -EHOSTDOWN;
+}
diff --git a/fs/smb/client/namespace.c b/fs/smb/client/namespace.c
new file mode 100644
index 0000000000..a6968573b7
--- /dev/null
+++ b/fs/smb/client/namespace.c
@@ -0,0 +1,262 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *   Contains mounting routines used for handling traversal via SMB junctions.
+ *
+ *   Copyright (c) 2007 Igor Mammedov
+ *   Copyright (C) International Business Machines  Corp., 2008
+ *   Author(s): Igor Mammedov (niallain@gmail.com)
+ *		Steve French (sfrench@us.ibm.com)
+ *   Copyright (c) 2023 Paulo Alcantara <palcantara@suse.de>
+ */
+
+#include <linux/dcache.h>
+#include <linux/mount.h>
+#include <linux/namei.h>
+#include <linux/slab.h>
+#include <linux/vfs.h>
+#include <linux/fs.h>
+#include <linux/inet.h>
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifsfs.h"
+#include "cifs_debug.h"
+#include "fs_context.h"
+
+static LIST_HEAD(cifs_automount_list);
+
+static void cifs_expire_automounts(struct work_struct *work);
+static DECLARE_DELAYED_WORK(cifs_automount_task,
+			    cifs_expire_automounts);
+static int cifs_mountpoint_expiry_timeout = 500 * HZ;
+
+static void cifs_expire_automounts(struct work_struct *work)
+{
+	struct list_head *list = &cifs_automount_list;
+
+	mark_mounts_for_expiry(list);
+	if (!list_empty(list))
+		schedule_delayed_work(&cifs_automount_task,
+				      cifs_mountpoint_expiry_timeout);
+}
+
+void cifs_release_automount_timer(void)
+{
+	if (WARN_ON(!list_empty(&cifs_automount_list)))
+		return;
+	cancel_delayed_work_sync(&cifs_automount_task);
+}
+
+/**
+ * cifs_build_devname - build a devicename from a UNC and optional prepath
+ * @nodename:	pointer to UNC string
+ * @prepath:	pointer to prefixpath (or NULL if there isn't one)
+ *
+ * Build a new cifs devicename after chasing a DFS referral. Allocate a buffer
+ * big enough to hold the final thing. Copy the UNC from the nodename, and
+ * concatenate the prepath onto the end of it if there is one.
+ *
+ * Returns pointer to the built string, or a ERR_PTR. Caller is responsible
+ * for freeing the returned string.
+ */
+char *
+cifs_build_devname(char *nodename, const char *prepath)
+{
+	size_t pplen;
+	size_t unclen;
+	char *dev;
+	char *pos;
+
+	/* skip over any preceding delimiters */
+	nodename += strspn(nodename, "\\");
+	if (!*nodename)
+		return ERR_PTR(-EINVAL);
+
+	/* get length of UNC and set pos to last char */
+	unclen = strlen(nodename);
+	pos = nodename + unclen - 1;
+
+	/* trim off any trailing delimiters */
+	while (*pos == '\\') {
+		--pos;
+		--unclen;
+	}
+
+	/* allocate a buffer:
+	 * +2 for preceding "//"
+	 * +1 for delimiter between UNC and prepath
+	 * +1 for trailing NULL
+	 */
+	pplen = prepath ? strlen(prepath) : 0;
+	dev = kmalloc(2 + unclen + 1 + pplen + 1, GFP_KERNEL);
+	if (!dev)
+		return ERR_PTR(-ENOMEM);
+
+	pos = dev;
+	/* add the initial "//" */
+	*pos = '/';
+	++pos;
+	*pos = '/';
+	++pos;
+
+	/* copy in the UNC portion from referral */
+	memcpy(pos, nodename, unclen);
+	pos += unclen;
+
+	/* copy the prefixpath remainder (if there is one) */
+	if (pplen) {
+		*pos = '/';
+		++pos;
+		memcpy(pos, prepath, pplen);
+		pos += pplen;
+	}
+
+	/* NULL terminator */
+	*pos = '\0';
+
+	convert_delimiter(dev, '/');
+	return dev;
+}
+
+static bool is_dfs_mount(struct dentry *dentry)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb);
+	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+	bool ret;
+
+	spin_lock(&tcon->tc_lock);
+	ret = !!tcon->origin_fullpath;
+	spin_unlock(&tcon->tc_lock);
+	return ret;
+}
+
+/* Return full path out of a dentry set for automount */
+static char *automount_fullpath(struct dentry *dentry, void *page)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb);
+	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+	size_t len;
+	char *s;
+
+	spin_lock(&tcon->tc_lock);
+	if (!tcon->origin_fullpath) {
+		spin_unlock(&tcon->tc_lock);
+		return build_path_from_dentry_optional_prefix(dentry,
+							      page,
+							      true);
+	}
+	spin_unlock(&tcon->tc_lock);
+
+	s = dentry_path_raw(dentry, page, PATH_MAX);
+	if (IS_ERR(s))
+		return s;
+	/* for root, we want "" */
+	if (!s[1])
+		s++;
+
+	spin_lock(&tcon->tc_lock);
+	len = strlen(tcon->origin_fullpath);
+	if (s < (char *)page + len) {
+		spin_unlock(&tcon->tc_lock);
+		return ERR_PTR(-ENAMETOOLONG);
+	}
+
+	s -= len;
+	memcpy(s, tcon->origin_fullpath, len);
+	spin_unlock(&tcon->tc_lock);
+	convert_delimiter(s, '/');
+
+	return s;
+}
+
+/*
+ * Create a vfsmount that we can automount
+ */
+static struct vfsmount *cifs_do_automount(struct path *path)
+{
+	int rc;
+	struct dentry *mntpt = path->dentry;
+	struct fs_context *fc;
+	void *page = NULL;
+	struct smb3_fs_context *ctx, *cur_ctx;
+	struct smb3_fs_context tmp;
+	char *full_path;
+	struct vfsmount *mnt;
+
+	if (IS_ROOT(mntpt))
+		return ERR_PTR(-ESTALE);
+
+	cur_ctx = CIFS_SB(mntpt->d_sb)->ctx;
+
+	fc = fs_context_for_submount(path->mnt->mnt_sb->s_type, mntpt);
+	if (IS_ERR(fc))
+		return ERR_CAST(fc);
+
+	ctx = smb3_fc2context(fc);
+
+	page = alloc_dentry_path();
+	full_path = automount_fullpath(mntpt, page);
+	if (IS_ERR(full_path)) {
+		mnt = ERR_CAST(full_path);
+		goto out;
+	}
+
+	tmp = *cur_ctx;
+	tmp.source = NULL;
+	tmp.leaf_fullpath = NULL;
+	tmp.UNC = tmp.prepath = NULL;
+	tmp.dfs_root_ses = NULL;
+
+	rc = smb3_fs_context_dup(ctx, &tmp);
+	if (rc) {
+		mnt = ERR_PTR(rc);
+		goto out;
+	}
+
+	rc = smb3_parse_devname(full_path, ctx);
+	if (rc) {
+		mnt = ERR_PTR(rc);
+		goto out;
+	}
+
+	ctx->source = smb3_fs_context_fullpath(ctx, '/');
+	if (IS_ERR(ctx->source)) {
+		mnt = ERR_CAST(ctx->source);
+		ctx->source = NULL;
+		goto out;
+	}
+	ctx->dfs_automount = is_dfs_mount(mntpt);
+	cifs_dbg(FYI, "%s: ctx: source=%s UNC=%s prepath=%s dfs_automount=%d\n",
+		 __func__, ctx->source, ctx->UNC, ctx->prepath, ctx->dfs_automount);
+
+	mnt = fc_mount(fc);
+out:
+	put_fs_context(fc);
+	free_dentry_path(page);
+	return mnt;
+}
+
+/*
+ * Attempt to automount the referral
+ */
+struct vfsmount *cifs_d_automount(struct path *path)
+{
+	struct vfsmount *newmnt;
+
+	cifs_dbg(FYI, "%s: %pd\n", __func__, path->dentry);
+
+	newmnt = cifs_do_automount(path);
+	if (IS_ERR(newmnt)) {
+		cifs_dbg(FYI, "leaving %s [automount failed]\n" , __func__);
+		return newmnt;
+	}
+
+	mntget(newmnt); /* prevent immediate expiration */
+	mnt_set_expiry(newmnt, &cifs_automount_list);
+	schedule_delayed_work(&cifs_automount_task,
+			      cifs_mountpoint_expiry_timeout);
+	cifs_dbg(FYI, "leaving %s [ok]\n" , __func__);
+	return newmnt;
+}
+
+const struct inode_operations cifs_namespace_inode_operations = {
+};
diff --git a/fs/smb/client/netlink.c b/fs/smb/client/netlink.c
new file mode 100644
index 0000000000..147d940925
--- /dev/null
+++ b/fs/smb/client/netlink.c
@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Netlink routines for CIFS
+ *
+ * Copyright (c) 2020 Samuel Cabrero <scabrero@suse.de>
+ */
+
+#include <net/genetlink.h>
+#include <uapi/linux/cifs/cifs_netlink.h>
+
+#include "netlink.h"
+#include "cifsglob.h"
+#include "cifs_debug.h"
+#include "cifs_swn.h"
+
+static const struct nla_policy cifs_genl_policy[CIFS_GENL_ATTR_MAX + 1] = {
+	[CIFS_GENL_ATTR_SWN_REGISTRATION_ID]	= { .type = NLA_U32 },
+	[CIFS_GENL_ATTR_SWN_NET_NAME]		= { .type = NLA_STRING },
+	[CIFS_GENL_ATTR_SWN_SHARE_NAME]		= { .type = NLA_STRING },
+	[CIFS_GENL_ATTR_SWN_IP]			= { .len = sizeof(struct sockaddr_storage) },
+	[CIFS_GENL_ATTR_SWN_NET_NAME_NOTIFY]	= { .type = NLA_FLAG },
+	[CIFS_GENL_ATTR_SWN_SHARE_NAME_NOTIFY]	= { .type = NLA_FLAG },
+	[CIFS_GENL_ATTR_SWN_IP_NOTIFY]		= { .type = NLA_FLAG },
+	[CIFS_GENL_ATTR_SWN_KRB_AUTH]		= { .type = NLA_FLAG },
+	[CIFS_GENL_ATTR_SWN_USER_NAME]		= { .type = NLA_STRING },
+	[CIFS_GENL_ATTR_SWN_PASSWORD]		= { .type = NLA_STRING },
+	[CIFS_GENL_ATTR_SWN_DOMAIN_NAME]	= { .type = NLA_STRING },
+	[CIFS_GENL_ATTR_SWN_NOTIFICATION_TYPE]	= { .type = NLA_U32 },
+	[CIFS_GENL_ATTR_SWN_RESOURCE_STATE]	= { .type = NLA_U32 },
+	[CIFS_GENL_ATTR_SWN_RESOURCE_NAME]	= { .type = NLA_STRING},
+};
+
+static const struct genl_ops cifs_genl_ops[] = {
+	{
+		.cmd = CIFS_GENL_CMD_SWN_NOTIFY,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.doit = cifs_swn_notify,
+	},
+};
+
+static const struct genl_multicast_group cifs_genl_mcgrps[] = {
+	[CIFS_GENL_MCGRP_SWN] = { .name = CIFS_GENL_MCGRP_SWN_NAME },
+};
+
+struct genl_family cifs_genl_family = {
+	.name		= CIFS_GENL_NAME,
+	.version	= CIFS_GENL_VERSION,
+	.hdrsize	= 0,
+	.maxattr	= CIFS_GENL_ATTR_MAX,
+	.module		= THIS_MODULE,
+	.policy		= cifs_genl_policy,
+	.ops		= cifs_genl_ops,
+	.n_ops		= ARRAY_SIZE(cifs_genl_ops),
+	.resv_start_op	= CIFS_GENL_CMD_SWN_NOTIFY + 1,
+	.mcgrps		= cifs_genl_mcgrps,
+	.n_mcgrps	= ARRAY_SIZE(cifs_genl_mcgrps),
+};
+
+/**
+ * cifs_genl_init - Register generic netlink family
+ *
+ * Return zero if initialized successfully, otherwise non-zero.
+ */
+int cifs_genl_init(void)
+{
+	int ret;
+
+	ret = genl_register_family(&cifs_genl_family);
+	if (ret < 0) {
+		cifs_dbg(VFS, "%s: failed to register netlink family\n",
+				__func__);
+		return ret;
+	}
+
+	return 0;
+}
+
+/**
+ * cifs_genl_exit - Unregister generic netlink family
+ */
+void cifs_genl_exit(void)
+{
+	int ret;
+
+	ret = genl_unregister_family(&cifs_genl_family);
+	if (ret < 0) {
+		cifs_dbg(VFS, "%s: failed to unregister netlink family\n",
+				__func__);
+	}
+}
diff --git a/fs/smb/client/netlink.h b/fs/smb/client/netlink.h
new file mode 100644
index 0000000000..e2fa8ed24c
--- /dev/null
+++ b/fs/smb/client/netlink.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Netlink routines for CIFS
+ *
+ * Copyright (c) 2020 Samuel Cabrero <scabrero@suse.de>
+ */
+
+#ifndef _CIFS_NETLINK_H
+#define _CIFS_NETLINK_H
+
+extern struct genl_family cifs_genl_family;
+
+extern int cifs_genl_init(void);
+extern void cifs_genl_exit(void);
+
+#endif /* _CIFS_NETLINK_H */
diff --git a/fs/smb/client/netmisc.c b/fs/smb/client/netmisc.c
new file mode 100644
index 0000000000..1b52e6ac43
--- /dev/null
+++ b/fs/smb/client/netmisc.c
@@ -0,0 +1,1021 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *
+ *   Copyright (c) International Business Machines  Corp., 2002,2008
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   Error mapping routines from Samba libsmb/errormap.c
+ *   Copyright (C) Andrew Tridgell 2001
+ */
+
+#include <linux/net.h>
+#include <linux/string.h>
+#include <linux/in.h>
+#include <linux/ctype.h>
+#include <linux/fs.h>
+#include <asm/div64.h>
+#include <asm/byteorder.h>
+#include <linux/inet.h>
+#include "cifsfs.h"
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "smberr.h"
+#include "cifs_debug.h"
+#include "nterr.h"
+
+struct smb_to_posix_error {
+	__u16 smb_err;
+	int posix_code;
+};
+
+static const struct smb_to_posix_error mapping_table_ERRDOS[] = {
+	{ERRbadfunc, -EINVAL},
+	{ERRbadfile, -ENOENT},
+	{ERRbadpath, -ENOTDIR},
+	{ERRnofids, -EMFILE},
+	{ERRnoaccess, -EACCES},
+	{ERRbadfid, -EBADF},
+	{ERRbadmcb, -EIO},
+	{ERRnomem, -EREMOTEIO},
+	{ERRbadmem, -EFAULT},
+	{ERRbadenv, -EFAULT},
+	{ERRbadformat, -EINVAL},
+	{ERRbadaccess, -EACCES},
+	{ERRbaddata, -EIO},
+	{ERRbaddrive, -ENXIO},
+	{ERRremcd, -EACCES},
+	{ERRdiffdevice, -EXDEV},
+	{ERRnofiles, -ENOENT},
+	{ERRwriteprot, -EROFS},
+	{ERRbadshare, -EBUSY},
+	{ERRlock, -EACCES},
+	{ERRunsup, -EINVAL},
+	{ERRnosuchshare, -ENXIO},
+	{ERRfilexists, -EEXIST},
+	{ERRinvparm, -EINVAL},
+	{ERRdiskfull, -ENOSPC},
+	{ERRinvname, -ENOENT},
+	{ERRinvlevel, -EOPNOTSUPP},
+	{ERRdirnotempty, -ENOTEMPTY},
+	{ERRnotlocked, -ENOLCK},
+	{ERRcancelviolation, -ENOLCK},
+	{ERRalreadyexists, -EEXIST},
+	{ERRmoredata, -EOVERFLOW},
+	{ERReasnotsupported, -EOPNOTSUPP},
+	{ErrQuota, -EDQUOT},
+	{ErrNotALink, -ENOLINK},
+	{ERRnetlogonNotStarted, -ENOPROTOOPT},
+	{ERRsymlink, -EOPNOTSUPP},
+	{ErrTooManyLinks, -EMLINK},
+	{0, 0}
+};
+
+static const struct smb_to_posix_error mapping_table_ERRSRV[] = {
+	{ERRerror, -EIO},
+	{ERRbadpw, -EACCES},  /* was EPERM */
+	{ERRbadtype, -EREMOTE},
+	{ERRaccess, -EACCES},
+	{ERRinvtid, -ENXIO},
+	{ERRinvnetname, -ENXIO},
+	{ERRinvdevice, -ENXIO},
+	{ERRqfull, -ENOSPC},
+	{ERRqtoobig, -ENOSPC},
+	{ERRqeof, -EIO},
+	{ERRinvpfid, -EBADF},
+	{ERRsmbcmd, -EBADRQC},
+	{ERRsrverror, -EIO},
+	{ERRbadBID, -EIO},
+	{ERRfilespecs, -EINVAL},
+	{ERRbadLink, -EIO},
+	{ERRbadpermits, -EINVAL},
+	{ERRbadPID, -ESRCH},
+	{ERRsetattrmode, -EINVAL},
+	{ERRpaused, -EHOSTDOWN},
+	{ERRmsgoff, -EHOSTDOWN},
+	{ERRnoroom, -ENOSPC},
+	{ERRrmuns, -EUSERS},
+	{ERRtimeout, -ETIME},
+	{ERRnoresource, -EREMOTEIO},
+	{ERRtoomanyuids, -EUSERS},
+	{ERRbaduid, -EACCES},
+	{ERRusempx, -EIO},
+	{ERRusestd, -EIO},
+	{ERR_NOTIFY_ENUM_DIR, -ENOBUFS},
+	{ERRnoSuchUser, -EACCES},
+/*	{ERRaccountexpired, -EACCES},
+	{ERRbadclient, -EACCES},
+	{ERRbadLogonTime, -EACCES},
+	{ERRpasswordExpired, -EACCES},*/
+	{ERRaccountexpired, -EKEYEXPIRED},
+	{ERRbadclient, -EACCES},
+	{ERRbadLogonTime, -EACCES},
+	{ERRpasswordExpired, -EKEYEXPIRED},
+
+	{ERRnosupport, -EINVAL},
+	{0, 0}
+};
+
+/*
+ * Convert a string containing text IPv4 or IPv6 address to binary form.
+ *
+ * Returns 0 on failure.
+ */
+static int
+cifs_inet_pton(const int address_family, const char *cp, int len, void *dst)
+{
+	int ret = 0;
+
+	/* calculate length by finding first slash or NULL */
+	if (address_family == AF_INET)
+		ret = in4_pton(cp, len, dst, '\\', NULL);
+	else if (address_family == AF_INET6)
+		ret = in6_pton(cp, len, dst , '\\', NULL);
+
+	cifs_dbg(NOISY, "address conversion returned %d for %*.*s\n",
+		 ret, len, len, cp);
+	if (ret > 0)
+		ret = 1;
+	return ret;
+}
+
+/*
+ * Try to convert a string to an IPv4 address and then attempt to convert
+ * it to an IPv6 address if that fails. Set the family field if either
+ * succeeds. If it's an IPv6 address and it has a '%' sign in it, try to
+ * treat the part following it as a numeric sin6_scope_id.
+ *
+ * Returns 0 on failure.
+ */
+int
+cifs_convert_address(struct sockaddr *dst, const char *src, int len)
+{
+	int rc, alen, slen;
+	const char *pct;
+	char scope_id[13];
+	struct sockaddr_in *s4 = (struct sockaddr_in *) dst;
+	struct sockaddr_in6 *s6 = (struct sockaddr_in6 *) dst;
+
+	/* IPv4 address */
+	if (cifs_inet_pton(AF_INET, src, len, &s4->sin_addr.s_addr)) {
+		s4->sin_family = AF_INET;
+		return 1;
+	}
+
+	/* attempt to exclude the scope ID from the address part */
+	pct = memchr(src, '%', len);
+	alen = pct ? pct - src : len;
+
+	rc = cifs_inet_pton(AF_INET6, src, alen, &s6->sin6_addr.s6_addr);
+	if (!rc)
+		return rc;
+
+	s6->sin6_family = AF_INET6;
+	if (pct) {
+		/* grab the scope ID */
+		slen = len - (alen + 1);
+		if (slen <= 0 || slen > 12)
+			return 0;
+		memcpy(scope_id, pct + 1, slen);
+		scope_id[slen] = '\0';
+
+		rc = kstrtouint(scope_id, 0, &s6->sin6_scope_id);
+		rc = (rc == 0) ? 1 : 0;
+	}
+
+	return rc;
+}
+
+void
+cifs_set_port(struct sockaddr *addr, const unsigned short int port)
+{
+	switch (addr->sa_family) {
+	case AF_INET:
+		((struct sockaddr_in *)addr)->sin_port = htons(port);
+		break;
+	case AF_INET6:
+		((struct sockaddr_in6 *)addr)->sin6_port = htons(port);
+		break;
+	}
+}
+
+/*****************************************************************************
+convert a NT status code to a dos class/code
+ *****************************************************************************/
+/* NT status -> dos error map */
+static const struct {
+	__u8 dos_class;
+	__u16 dos_code;
+	__u32 ntstatus;
+} ntstatus_to_dos_map[] = {
+	{
+	ERRDOS, ERRgeneral, NT_STATUS_UNSUCCESSFUL}, {
+	ERRDOS, ERRbadfunc, NT_STATUS_NOT_IMPLEMENTED}, {
+	ERRDOS, ERRinvlevel, NT_STATUS_INVALID_INFO_CLASS}, {
+	ERRDOS, 24, NT_STATUS_INFO_LENGTH_MISMATCH}, {
+	ERRHRD, ERRgeneral, NT_STATUS_ACCESS_VIOLATION}, {
+	ERRHRD, ERRgeneral, NT_STATUS_IN_PAGE_ERROR}, {
+	ERRHRD, ERRgeneral, NT_STATUS_PAGEFILE_QUOTA}, {
+	ERRDOS, ERRbadfid, NT_STATUS_INVALID_HANDLE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_BAD_INITIAL_STACK}, {
+	ERRDOS, 193, NT_STATUS_BAD_INITIAL_PC}, {
+	ERRDOS, 87, NT_STATUS_INVALID_CID}, {
+	ERRHRD, ERRgeneral, NT_STATUS_TIMER_NOT_CANCELED}, {
+	ERRDOS, 87, NT_STATUS_INVALID_PARAMETER}, {
+	ERRDOS, ERRbadfile, NT_STATUS_NO_SUCH_DEVICE}, {
+	ERRDOS, ERRbadfile, NT_STATUS_NO_SUCH_FILE}, {
+	ERRDOS, ERRbadfunc, NT_STATUS_INVALID_DEVICE_REQUEST}, {
+	ERRDOS, 38, NT_STATUS_END_OF_FILE}, {
+	ERRDOS, 34, NT_STATUS_WRONG_VOLUME}, {
+	ERRDOS, 21, NT_STATUS_NO_MEDIA_IN_DEVICE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_UNRECOGNIZED_MEDIA}, {
+	ERRDOS, 27, NT_STATUS_NONEXISTENT_SECTOR},
+/*	{ This NT error code was 'sqashed'
+	 from NT_STATUS_MORE_PROCESSING_REQUIRED to NT_STATUS_OK
+	 during the session setup } */
+	{
+	ERRDOS, ERRnomem, NT_STATUS_NO_MEMORY}, {
+	ERRDOS, 487, NT_STATUS_CONFLICTING_ADDRESSES}, {
+	ERRDOS, 487, NT_STATUS_NOT_MAPPED_VIEW}, {
+	ERRDOS, 87, NT_STATUS_UNABLE_TO_FREE_VM}, {
+	ERRDOS, 87, NT_STATUS_UNABLE_TO_DELETE_SECTION}, {
+	ERRDOS, 2142, NT_STATUS_INVALID_SYSTEM_SERVICE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_ILLEGAL_INSTRUCTION}, {
+	ERRDOS, ERRnoaccess, NT_STATUS_INVALID_LOCK_SEQUENCE}, {
+	ERRDOS, ERRnoaccess, NT_STATUS_INVALID_VIEW_SIZE}, {
+	ERRDOS, 193, NT_STATUS_INVALID_FILE_FOR_SECTION}, {
+	ERRDOS, ERRnoaccess, NT_STATUS_ALREADY_COMMITTED},
+/*	{ This NT error code was 'sqashed'
+	 from NT_STATUS_ACCESS_DENIED to NT_STATUS_TRUSTED_RELATIONSHIP_FAILURE
+	 during the session setup }   */
+	{
+	ERRDOS, ERRnoaccess, NT_STATUS_ACCESS_DENIED}, {
+	ERRDOS, 111, NT_STATUS_BUFFER_TOO_SMALL}, {
+	ERRDOS, ERRbadfid, NT_STATUS_OBJECT_TYPE_MISMATCH}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NONCONTINUABLE_EXCEPTION}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_DISPOSITION}, {
+	ERRHRD, ERRgeneral, NT_STATUS_UNWIND}, {
+	ERRHRD, ERRgeneral, NT_STATUS_BAD_STACK}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_UNWIND_TARGET}, {
+	ERRDOS, 158, NT_STATUS_NOT_LOCKED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_PARITY_ERROR}, {
+	ERRDOS, 487, NT_STATUS_UNABLE_TO_DECOMMIT_VM}, {
+	ERRDOS, 487, NT_STATUS_NOT_COMMITTED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_PORT_ATTRIBUTES}, {
+	ERRHRD, ERRgeneral, NT_STATUS_PORT_MESSAGE_TOO_LONG}, {
+	ERRDOS, 87, NT_STATUS_INVALID_PARAMETER_MIX}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_QUOTA_LOWER}, {
+	ERRHRD, ERRgeneral, NT_STATUS_DISK_CORRUPT_ERROR}, {
+	 /* mapping changed since shell does lookup on * expects FileNotFound */
+	ERRDOS, ERRbadfile, NT_STATUS_OBJECT_NAME_INVALID}, {
+	ERRDOS, ERRbadfile, NT_STATUS_OBJECT_NAME_NOT_FOUND}, {
+	ERRDOS, ERRalreadyexists, NT_STATUS_OBJECT_NAME_COLLISION}, {
+	ERRHRD, ERRgeneral, NT_STATUS_HANDLE_NOT_WAITABLE}, {
+	ERRDOS, ERRbadfid, NT_STATUS_PORT_DISCONNECTED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_DEVICE_ALREADY_ATTACHED}, {
+	ERRDOS, 161, NT_STATUS_OBJECT_PATH_INVALID}, {
+	ERRDOS, ERRbadpath, NT_STATUS_OBJECT_PATH_NOT_FOUND}, {
+	ERRDOS, 161, NT_STATUS_OBJECT_PATH_SYNTAX_BAD}, {
+	ERRHRD, ERRgeneral, NT_STATUS_DATA_OVERRUN}, {
+	ERRHRD, ERRgeneral, NT_STATUS_DATA_LATE_ERROR}, {
+	ERRDOS, 23, NT_STATUS_DATA_ERROR}, {
+	ERRDOS, 23, NT_STATUS_CRC_ERROR}, {
+	ERRDOS, ERRnomem, NT_STATUS_SECTION_TOO_BIG}, {
+	ERRDOS, ERRnoaccess, NT_STATUS_PORT_CONNECTION_REFUSED}, {
+	ERRDOS, ERRbadfid, NT_STATUS_INVALID_PORT_HANDLE}, {
+	ERRDOS, ERRbadshare, NT_STATUS_SHARING_VIOLATION}, {
+	ERRHRD, ERRgeneral, NT_STATUS_QUOTA_EXCEEDED}, {
+	ERRDOS, 87, NT_STATUS_INVALID_PAGE_PROTECTION}, {
+	ERRDOS, 288, NT_STATUS_MUTANT_NOT_OWNED}, {
+	ERRDOS, 298, NT_STATUS_SEMAPHORE_LIMIT_EXCEEDED}, {
+	ERRDOS, 87, NT_STATUS_PORT_ALREADY_SET}, {
+	ERRDOS, 87, NT_STATUS_SECTION_NOT_IMAGE}, {
+	ERRDOS, 156, NT_STATUS_SUSPEND_COUNT_EXCEEDED}, {
+	ERRDOS, ERRnoaccess, NT_STATUS_THREAD_IS_TERMINATING}, {
+	ERRDOS, 87, NT_STATUS_BAD_WORKING_SET_LIMIT}, {
+	ERRDOS, 87, NT_STATUS_INCOMPATIBLE_FILE_MAP}, {
+	ERRDOS, 87, NT_STATUS_SECTION_PROTECTION}, {
+	ERRDOS, ERReasnotsupported, NT_STATUS_EAS_NOT_SUPPORTED}, {
+	ERRDOS, 255, NT_STATUS_EA_TOO_LARGE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NONEXISTENT_EA_ENTRY}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NO_EAS_ON_FILE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_EA_CORRUPT_ERROR}, {
+	ERRDOS, ERRlock, NT_STATUS_FILE_LOCK_CONFLICT}, {
+	ERRDOS, ERRlock, NT_STATUS_LOCK_NOT_GRANTED}, {
+	ERRDOS, ERRbadfile, NT_STATUS_DELETE_PENDING}, {
+	ERRDOS, ERRunsup, NT_STATUS_CTL_FILE_NOT_SUPPORTED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_UNKNOWN_REVISION}, {
+	ERRHRD, ERRgeneral, NT_STATUS_REVISION_MISMATCH}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_OWNER}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_PRIMARY_GROUP}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NO_IMPERSONATION_TOKEN}, {
+	ERRHRD, ERRgeneral, NT_STATUS_CANT_DISABLE_MANDATORY}, {
+	ERRDOS, 2215, NT_STATUS_NO_LOGON_SERVERS}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NO_SUCH_LOGON_SESSION}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NO_SUCH_PRIVILEGE}, {
+	ERRDOS, ERRnoaccess, NT_STATUS_PRIVILEGE_NOT_HELD}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_ACCOUNT_NAME}, {
+	ERRHRD, ERRgeneral, NT_STATUS_USER_EXISTS},
+/*	{ This NT error code was 'sqashed'
+	 from NT_STATUS_NO_SUCH_USER to NT_STATUS_LOGON_FAILURE
+	 during the session setup } */
+	{
+	ERRDOS, ERRnoaccess, NT_STATUS_NO_SUCH_USER}, { /* could map to 2238 */
+	ERRHRD, ERRgeneral, NT_STATUS_GROUP_EXISTS}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NO_SUCH_GROUP}, {
+	ERRHRD, ERRgeneral, NT_STATUS_MEMBER_IN_GROUP}, {
+	ERRHRD, ERRgeneral, NT_STATUS_MEMBER_NOT_IN_GROUP}, {
+	ERRHRD, ERRgeneral, NT_STATUS_LAST_ADMIN},
+/*	{ This NT error code was 'sqashed'
+	 from NT_STATUS_WRONG_PASSWORD to NT_STATUS_LOGON_FAILURE
+	 during the session setup } */
+	{
+	ERRSRV, ERRbadpw, NT_STATUS_WRONG_PASSWORD}, {
+	ERRHRD, ERRgeneral, NT_STATUS_ILL_FORMED_PASSWORD}, {
+	ERRHRD, ERRgeneral, NT_STATUS_PASSWORD_RESTRICTION}, {
+	ERRDOS, ERRnoaccess, NT_STATUS_LOGON_FAILURE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_ACCOUNT_RESTRICTION}, {
+	ERRSRV, ERRbadLogonTime, NT_STATUS_INVALID_LOGON_HOURS}, {
+	ERRSRV, ERRbadclient, NT_STATUS_INVALID_WORKSTATION}, {
+	ERRSRV, ERRpasswordExpired, NT_STATUS_PASSWORD_EXPIRED}, {
+	ERRSRV, ERRaccountexpired, NT_STATUS_ACCOUNT_DISABLED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NONE_MAPPED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_TOO_MANY_LUIDS_REQUESTED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_LUIDS_EXHAUSTED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_SUB_AUTHORITY}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_ACL}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_SID}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_SECURITY_DESCR}, {
+	ERRDOS, 127, NT_STATUS_PROCEDURE_NOT_FOUND}, {
+	ERRDOS, 193, NT_STATUS_INVALID_IMAGE_FORMAT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NO_TOKEN}, {
+	ERRHRD, ERRgeneral, NT_STATUS_BAD_INHERITANCE_ACL}, {
+	ERRDOS, 158, NT_STATUS_RANGE_NOT_LOCKED}, {
+	ERRDOS, 112, NT_STATUS_DISK_FULL}, {
+	ERRHRD, ERRgeneral, NT_STATUS_SERVER_DISABLED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_SERVER_NOT_DISABLED}, {
+	ERRDOS, 68, NT_STATUS_TOO_MANY_GUIDS_REQUESTED}, {
+	ERRDOS, 259, NT_STATUS_GUIDS_EXHAUSTED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_ID_AUTHORITY}, {
+	ERRDOS, 259, NT_STATUS_AGENTS_EXHAUSTED}, {
+	ERRDOS, 154, NT_STATUS_INVALID_VOLUME_LABEL}, {
+	ERRDOS, 14, NT_STATUS_SECTION_NOT_EXTENDED}, {
+	ERRDOS, 487, NT_STATUS_NOT_MAPPED_DATA}, {
+	ERRHRD, ERRgeneral, NT_STATUS_RESOURCE_DATA_NOT_FOUND}, {
+	ERRHRD, ERRgeneral, NT_STATUS_RESOURCE_TYPE_NOT_FOUND}, {
+	ERRHRD, ERRgeneral, NT_STATUS_RESOURCE_NAME_NOT_FOUND}, {
+	ERRHRD, ERRgeneral, NT_STATUS_ARRAY_BOUNDS_EXCEEDED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_FLOAT_DENORMAL_OPERAND}, {
+	ERRHRD, ERRgeneral, NT_STATUS_FLOAT_DIVIDE_BY_ZERO}, {
+	ERRHRD, ERRgeneral, NT_STATUS_FLOAT_INEXACT_RESULT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_FLOAT_INVALID_OPERATION}, {
+	ERRHRD, ERRgeneral, NT_STATUS_FLOAT_OVERFLOW}, {
+	ERRHRD, ERRgeneral, NT_STATUS_FLOAT_STACK_CHECK}, {
+	ERRHRD, ERRgeneral, NT_STATUS_FLOAT_UNDERFLOW}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INTEGER_DIVIDE_BY_ZERO}, {
+	ERRDOS, 534, NT_STATUS_INTEGER_OVERFLOW}, {
+	ERRHRD, ERRgeneral, NT_STATUS_PRIVILEGED_INSTRUCTION}, {
+	ERRDOS, ERRnomem, NT_STATUS_TOO_MANY_PAGING_FILES}, {
+	ERRHRD, ERRgeneral, NT_STATUS_FILE_INVALID}, {
+	ERRHRD, ERRgeneral, NT_STATUS_ALLOTTED_SPACE_EXCEEDED},
+/*	{ This NT error code was 'sqashed'
+	 from NT_STATUS_INSUFFICIENT_RESOURCES to
+	 NT_STATUS_INSUFF_SERVER_RESOURCES during the session setup } */
+	{
+	ERRDOS, ERRnoresource, NT_STATUS_INSUFFICIENT_RESOURCES}, {
+	ERRDOS, ERRbadpath, NT_STATUS_DFS_EXIT_PATH_FOUND}, {
+	ERRDOS, 23, NT_STATUS_DEVICE_DATA_ERROR}, {
+	ERRHRD, ERRgeneral, NT_STATUS_DEVICE_NOT_CONNECTED}, {
+	ERRDOS, 21, NT_STATUS_DEVICE_POWER_FAILURE}, {
+	ERRDOS, 487, NT_STATUS_FREE_VM_NOT_AT_BASE}, {
+	ERRDOS, 487, NT_STATUS_MEMORY_NOT_ALLOCATED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_WORKING_SET_QUOTA}, {
+	ERRDOS, 19, NT_STATUS_MEDIA_WRITE_PROTECTED}, {
+	ERRDOS, 21, NT_STATUS_DEVICE_NOT_READY}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_GROUP_ATTRIBUTES}, {
+	ERRHRD, ERRgeneral, NT_STATUS_BAD_IMPERSONATION_LEVEL}, {
+	ERRHRD, ERRgeneral, NT_STATUS_CANT_OPEN_ANONYMOUS}, {
+	ERRHRD, ERRgeneral, NT_STATUS_BAD_VALIDATION_CLASS}, {
+	ERRHRD, ERRgeneral, NT_STATUS_BAD_TOKEN_TYPE}, {
+	ERRDOS, 87, NT_STATUS_BAD_MASTER_BOOT_RECORD}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INSTRUCTION_MISALIGNMENT}, {
+	ERRDOS, ERRpipebusy, NT_STATUS_INSTANCE_NOT_AVAILABLE}, {
+	ERRDOS, ERRpipebusy, NT_STATUS_PIPE_NOT_AVAILABLE}, {
+	ERRDOS, ERRbadpipe, NT_STATUS_INVALID_PIPE_STATE}, {
+	ERRDOS, ERRpipebusy, NT_STATUS_PIPE_BUSY}, {
+	ERRDOS, ERRbadfunc, NT_STATUS_ILLEGAL_FUNCTION}, {
+	ERRDOS, ERRnotconnected, NT_STATUS_PIPE_DISCONNECTED}, {
+	ERRDOS, ERRpipeclosing, NT_STATUS_PIPE_CLOSING}, {
+	ERRHRD, ERRgeneral, NT_STATUS_PIPE_CONNECTED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_PIPE_LISTENING}, {
+	ERRDOS, ERRbadpipe, NT_STATUS_INVALID_READ_MODE}, {
+	ERRDOS, 121, NT_STATUS_IO_TIMEOUT}, {
+	ERRDOS, 38, NT_STATUS_FILE_FORCED_CLOSED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_PROFILING_NOT_STARTED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_PROFILING_NOT_STOPPED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_COULD_NOT_INTERPRET}, {
+	ERRDOS, ERRnoaccess, NT_STATUS_FILE_IS_A_DIRECTORY}, {
+	ERRDOS, ERRunsup, NT_STATUS_NOT_SUPPORTED}, {
+	ERRDOS, 51, NT_STATUS_REMOTE_NOT_LISTENING}, {
+	ERRDOS, 52, NT_STATUS_DUPLICATE_NAME}, {
+	ERRDOS, 53, NT_STATUS_BAD_NETWORK_PATH}, {
+	ERRDOS, 54, NT_STATUS_NETWORK_BUSY}, {
+	ERRDOS, 55, NT_STATUS_DEVICE_DOES_NOT_EXIST}, {
+	ERRDOS, 56, NT_STATUS_TOO_MANY_COMMANDS}, {
+	ERRDOS, 57, NT_STATUS_ADAPTER_HARDWARE_ERROR}, {
+	ERRDOS, 58, NT_STATUS_INVALID_NETWORK_RESPONSE}, {
+	ERRDOS, 59, NT_STATUS_UNEXPECTED_NETWORK_ERROR}, {
+	ERRDOS, 60, NT_STATUS_BAD_REMOTE_ADAPTER}, {
+	ERRDOS, 61, NT_STATUS_PRINT_QUEUE_FULL}, {
+	ERRDOS, 62, NT_STATUS_NO_SPOOL_SPACE}, {
+	ERRDOS, 63, NT_STATUS_PRINT_CANCELLED}, {
+	ERRDOS, 64, NT_STATUS_NETWORK_NAME_DELETED}, {
+	ERRDOS, 65, NT_STATUS_NETWORK_ACCESS_DENIED}, {
+	ERRDOS, 66, NT_STATUS_BAD_DEVICE_TYPE}, {
+	ERRDOS, ERRnosuchshare, NT_STATUS_BAD_NETWORK_NAME}, {
+	ERRDOS, 68, NT_STATUS_TOO_MANY_NAMES}, {
+	ERRDOS, 69, NT_STATUS_TOO_MANY_SESSIONS}, {
+	ERRDOS, 70, NT_STATUS_SHARING_PAUSED}, {
+	ERRDOS, 71, NT_STATUS_REQUEST_NOT_ACCEPTED}, {
+	ERRDOS, 72, NT_STATUS_REDIRECTOR_PAUSED}, {
+	ERRDOS, 88, NT_STATUS_NET_WRITE_FAULT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_PROFILING_AT_LIMIT}, {
+	ERRDOS, ERRdiffdevice, NT_STATUS_NOT_SAME_DEVICE}, {
+	ERRDOS, ERRnoaccess, NT_STATUS_FILE_RENAMED}, {
+	ERRDOS, 240, NT_STATUS_VIRTUAL_CIRCUIT_CLOSED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NO_SECURITY_ON_OBJECT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_CANT_WAIT}, {
+	ERRDOS, ERRpipeclosing, NT_STATUS_PIPE_EMPTY}, {
+	ERRHRD, ERRgeneral, NT_STATUS_CANT_ACCESS_DOMAIN_INFO}, {
+	ERRHRD, ERRgeneral, NT_STATUS_CANT_TERMINATE_SELF}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_SERVER_STATE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_DOMAIN_STATE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_DOMAIN_ROLE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NO_SUCH_DOMAIN}, {
+	ERRHRD, ERRgeneral, NT_STATUS_DOMAIN_EXISTS}, {
+	ERRHRD, ERRgeneral, NT_STATUS_DOMAIN_LIMIT_EXCEEDED}, {
+	ERRDOS, 300, NT_STATUS_OPLOCK_NOT_GRANTED}, {
+	ERRDOS, 301, NT_STATUS_INVALID_OPLOCK_PROTOCOL}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INTERNAL_DB_CORRUPTION}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INTERNAL_ERROR}, {
+	ERRHRD, ERRgeneral, NT_STATUS_GENERIC_NOT_MAPPED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_BAD_DESCRIPTOR_FORMAT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_USER_BUFFER}, {
+	ERRHRD, ERRgeneral, NT_STATUS_UNEXPECTED_IO_ERROR}, {
+	ERRHRD, ERRgeneral, NT_STATUS_UNEXPECTED_MM_CREATE_ERR}, {
+	ERRHRD, ERRgeneral, NT_STATUS_UNEXPECTED_MM_MAP_ERROR}, {
+	ERRHRD, ERRgeneral, NT_STATUS_UNEXPECTED_MM_EXTEND_ERR}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NOT_LOGON_PROCESS}, {
+	ERRHRD, ERRgeneral, NT_STATUS_LOGON_SESSION_EXISTS}, {
+	ERRDOS, 87, NT_STATUS_INVALID_PARAMETER_1}, {
+	ERRDOS, 87, NT_STATUS_INVALID_PARAMETER_2}, {
+	ERRDOS, 87, NT_STATUS_INVALID_PARAMETER_3}, {
+	ERRDOS, 87, NT_STATUS_INVALID_PARAMETER_4}, {
+	ERRDOS, 87, NT_STATUS_INVALID_PARAMETER_5}, {
+	ERRDOS, 87, NT_STATUS_INVALID_PARAMETER_6}, {
+	ERRDOS, 87, NT_STATUS_INVALID_PARAMETER_7}, {
+	ERRDOS, 87, NT_STATUS_INVALID_PARAMETER_8}, {
+	ERRDOS, 87, NT_STATUS_INVALID_PARAMETER_9}, {
+	ERRDOS, 87, NT_STATUS_INVALID_PARAMETER_10}, {
+	ERRDOS, 87, NT_STATUS_INVALID_PARAMETER_11}, {
+	ERRDOS, 87, NT_STATUS_INVALID_PARAMETER_12}, {
+	ERRDOS, ERRbadpath, NT_STATUS_REDIRECTOR_NOT_STARTED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_REDIRECTOR_STARTED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_STACK_OVERFLOW}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NO_SUCH_PACKAGE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_BAD_FUNCTION_TABLE}, {
+	ERRDOS, 203, 0xc0000100}, {
+	ERRDOS, 145, NT_STATUS_DIRECTORY_NOT_EMPTY}, {
+	ERRHRD, ERRgeneral, NT_STATUS_FILE_CORRUPT_ERROR}, {
+	ERRDOS, 267, NT_STATUS_NOT_A_DIRECTORY}, {
+	ERRHRD, ERRgeneral, NT_STATUS_BAD_LOGON_SESSION_STATE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_LOGON_SESSION_COLLISION}, {
+	ERRDOS, 206, NT_STATUS_NAME_TOO_LONG}, {
+	ERRDOS, 2401, NT_STATUS_FILES_OPEN}, {
+	ERRDOS, 2404, NT_STATUS_CONNECTION_IN_USE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_MESSAGE_NOT_FOUND}, {
+	ERRDOS, ERRnoaccess, NT_STATUS_PROCESS_IS_TERMINATING}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_LOGON_TYPE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NO_GUID_TRANSLATION}, {
+	ERRHRD, ERRgeneral, NT_STATUS_CANNOT_IMPERSONATE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_IMAGE_ALREADY_LOADED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_ABIOS_NOT_PRESENT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_ABIOS_LID_NOT_EXIST}, {
+	ERRHRD, ERRgeneral, NT_STATUS_ABIOS_LID_ALREADY_OWNED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_ABIOS_NOT_LID_OWNER}, {
+	ERRHRD, ERRgeneral, NT_STATUS_ABIOS_INVALID_COMMAND}, {
+	ERRHRD, ERRgeneral, NT_STATUS_ABIOS_INVALID_LID}, {
+	ERRHRD, ERRgeneral, NT_STATUS_ABIOS_SELECTOR_NOT_AVAILABLE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_ABIOS_INVALID_SELECTOR}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NO_LDT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_LDT_SIZE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_LDT_OFFSET}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_LDT_DESCRIPTOR}, {
+	ERRDOS, 193, NT_STATUS_INVALID_IMAGE_NE_FORMAT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_RXACT_INVALID_STATE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_RXACT_COMMIT_FAILURE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_MAPPED_FILE_SIZE_ZERO}, {
+	ERRDOS, ERRnofids, NT_STATUS_TOO_MANY_OPENED_FILES}, {
+	ERRHRD, ERRgeneral, NT_STATUS_CANCELLED}, {
+	ERRDOS, ERRnoaccess, NT_STATUS_CANNOT_DELETE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_COMPUTER_NAME}, {
+	ERRDOS, ERRnoaccess, NT_STATUS_FILE_DELETED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_SPECIAL_ACCOUNT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_SPECIAL_GROUP}, {
+	ERRHRD, ERRgeneral, NT_STATUS_SPECIAL_USER}, {
+	ERRHRD, ERRgeneral, NT_STATUS_MEMBERS_PRIMARY_GROUP}, {
+	ERRDOS, ERRbadfid, NT_STATUS_FILE_CLOSED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_TOO_MANY_THREADS}, {
+	ERRHRD, ERRgeneral, NT_STATUS_THREAD_NOT_IN_PROCESS}, {
+	ERRHRD, ERRgeneral, NT_STATUS_TOKEN_ALREADY_IN_USE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_PAGEFILE_QUOTA_EXCEEDED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_COMMITMENT_LIMIT}, {
+	ERRDOS, 193, NT_STATUS_INVALID_IMAGE_LE_FORMAT}, {
+	ERRDOS, 193, NT_STATUS_INVALID_IMAGE_NOT_MZ}, {
+	ERRDOS, 193, NT_STATUS_INVALID_IMAGE_PROTECT}, {
+	ERRDOS, 193, NT_STATUS_INVALID_IMAGE_WIN_16}, {
+	ERRHRD, ERRgeneral, NT_STATUS_LOGON_SERVER_CONFLICT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_TIME_DIFFERENCE_AT_DC}, {
+	ERRHRD, ERRgeneral, NT_STATUS_SYNCHRONIZATION_REQUIRED}, {
+	ERRDOS, 126, NT_STATUS_DLL_NOT_FOUND}, {
+	ERRHRD, ERRgeneral, NT_STATUS_OPEN_FAILED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_IO_PRIVILEGE_FAILED}, {
+	ERRDOS, 182, NT_STATUS_ORDINAL_NOT_FOUND}, {
+	ERRDOS, 127, NT_STATUS_ENTRYPOINT_NOT_FOUND}, {
+	ERRHRD, ERRgeneral, NT_STATUS_CONTROL_C_EXIT}, {
+	ERRDOS, 64, NT_STATUS_LOCAL_DISCONNECT}, {
+	ERRDOS, 64, NT_STATUS_REMOTE_DISCONNECT}, {
+	ERRDOS, 51, NT_STATUS_REMOTE_RESOURCES}, {
+	ERRDOS, 59, NT_STATUS_LINK_FAILED}, {
+	ERRDOS, 59, NT_STATUS_LINK_TIMEOUT}, {
+	ERRDOS, 59, NT_STATUS_INVALID_CONNECTION}, {
+	ERRDOS, 59, NT_STATUS_INVALID_ADDRESS}, {
+	ERRHRD, ERRgeneral, NT_STATUS_DLL_INIT_FAILED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_MISSING_SYSTEMFILE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_UNHANDLED_EXCEPTION}, {
+	ERRHRD, ERRgeneral, NT_STATUS_APP_INIT_FAILURE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_PAGEFILE_CREATE_FAILED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NO_PAGEFILE}, {
+	ERRDOS, 124, NT_STATUS_INVALID_LEVEL}, {
+	ERRDOS, 86, NT_STATUS_WRONG_PASSWORD_CORE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_ILLEGAL_FLOAT_CONTEXT}, {
+	ERRDOS, 109, NT_STATUS_PIPE_BROKEN}, {
+	ERRHRD, ERRgeneral, NT_STATUS_REGISTRY_CORRUPT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_REGISTRY_IO_FAILED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NO_EVENT_PAIR}, {
+	ERRHRD, ERRgeneral, NT_STATUS_UNRECOGNIZED_VOLUME}, {
+	ERRHRD, ERRgeneral, NT_STATUS_SERIAL_NO_DEVICE_INITED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NO_SUCH_ALIAS}, {
+	ERRHRD, ERRgeneral, NT_STATUS_MEMBER_NOT_IN_ALIAS}, {
+	ERRHRD, ERRgeneral, NT_STATUS_MEMBER_IN_ALIAS}, {
+	ERRHRD, ERRgeneral, NT_STATUS_ALIAS_EXISTS}, {
+	ERRHRD, ERRgeneral, NT_STATUS_LOGON_NOT_GRANTED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_TOO_MANY_SECRETS}, {
+	ERRHRD, ERRgeneral, NT_STATUS_SECRET_TOO_LONG}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INTERNAL_DB_ERROR}, {
+	ERRHRD, ERRgeneral, NT_STATUS_FULLSCREEN_MODE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_TOO_MANY_CONTEXT_IDS}, {
+	ERRDOS, ERRnoaccess, NT_STATUS_LOGON_TYPE_NOT_GRANTED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NOT_REGISTRY_FILE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NT_CROSS_ENCRYPTION_REQUIRED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_DOMAIN_CTRLR_CONFIG_ERROR}, {
+	ERRHRD, ERRgeneral, NT_STATUS_FT_MISSING_MEMBER}, {
+	ERRHRD, ERRgeneral, NT_STATUS_ILL_FORMED_SERVICE_ENTRY}, {
+	ERRHRD, ERRgeneral, NT_STATUS_ILLEGAL_CHARACTER}, {
+	ERRHRD, ERRgeneral, NT_STATUS_UNMAPPABLE_CHARACTER}, {
+	ERRHRD, ERRgeneral, NT_STATUS_UNDEFINED_CHARACTER}, {
+	ERRHRD, ERRgeneral, NT_STATUS_FLOPPY_VOLUME}, {
+	ERRHRD, ERRgeneral, NT_STATUS_FLOPPY_ID_MARK_NOT_FOUND}, {
+	ERRHRD, ERRgeneral, NT_STATUS_FLOPPY_WRONG_CYLINDER}, {
+	ERRHRD, ERRgeneral, NT_STATUS_FLOPPY_UNKNOWN_ERROR}, {
+	ERRHRD, ERRgeneral, NT_STATUS_FLOPPY_BAD_REGISTERS}, {
+	ERRHRD, ERRgeneral, NT_STATUS_DISK_RECALIBRATE_FAILED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_DISK_OPERATION_FAILED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_DISK_RESET_FAILED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_SHARED_IRQ_BUSY}, {
+	ERRHRD, ERRgeneral, NT_STATUS_FT_ORPHANING}, {
+	ERRHRD, ERRgeneral, 0xc000016e}, {
+	ERRHRD, ERRgeneral, 0xc000016f}, {
+	ERRHRD, ERRgeneral, 0xc0000170}, {
+	ERRHRD, ERRgeneral, 0xc0000171}, {
+	ERRHRD, ERRgeneral, NT_STATUS_PARTITION_FAILURE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_BLOCK_LENGTH}, {
+	ERRHRD, ERRgeneral, NT_STATUS_DEVICE_NOT_PARTITIONED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_UNABLE_TO_LOCK_MEDIA}, {
+	ERRHRD, ERRgeneral, NT_STATUS_UNABLE_TO_UNLOAD_MEDIA}, {
+	ERRHRD, ERRgeneral, NT_STATUS_EOM_OVERFLOW}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NO_MEDIA}, {
+	ERRHRD, ERRgeneral, 0xc0000179}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NO_SUCH_MEMBER}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_MEMBER}, {
+	ERRHRD, ERRgeneral, NT_STATUS_KEY_DELETED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NO_LOG_SPACE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_TOO_MANY_SIDS}, {
+	ERRHRD, ERRgeneral, NT_STATUS_LM_CROSS_ENCRYPTION_REQUIRED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_KEY_HAS_CHILDREN}, {
+	ERRHRD, ERRgeneral, NT_STATUS_CHILD_MUST_BE_VOLATILE}, {
+	ERRDOS, 87, NT_STATUS_DEVICE_CONFIGURATION_ERROR}, {
+	ERRHRD, ERRgeneral, NT_STATUS_DRIVER_INTERNAL_ERROR}, {
+	ERRDOS, 22, NT_STATUS_INVALID_DEVICE_STATE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_IO_DEVICE_ERROR}, {
+	ERRHRD, ERRgeneral, NT_STATUS_DEVICE_PROTOCOL_ERROR}, {
+	ERRHRD, ERRgeneral, NT_STATUS_BACKUP_CONTROLLER}, {
+	ERRHRD, ERRgeneral, NT_STATUS_LOG_FILE_FULL}, {
+	ERRDOS, 19, NT_STATUS_TOO_LATE}, {
+	ERRDOS, ERRnoaccess, NT_STATUS_NO_TRUST_LSA_SECRET},
+/*	{ This NT error code was 'sqashed'
+	 from NT_STATUS_NO_TRUST_SAM_ACCOUNT to
+	 NT_STATUS_TRUSTED_RELATIONSHIP_FAILURE during the session setup } */
+	{
+	ERRDOS, ERRnoaccess, NT_STATUS_NO_TRUST_SAM_ACCOUNT}, {
+	ERRDOS, ERRnoaccess, NT_STATUS_TRUSTED_DOMAIN_FAILURE}, {
+	ERRDOS, ERRnoaccess, NT_STATUS_TRUSTED_RELATIONSHIP_FAILURE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_EVENTLOG_FILE_CORRUPT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_EVENTLOG_CANT_START}, {
+	ERRDOS, ERRnoaccess, NT_STATUS_TRUST_FAILURE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_MUTANT_LIMIT_EXCEEDED}, {
+	ERRDOS, ERRnetlogonNotStarted, NT_STATUS_NETLOGON_NOT_STARTED}, {
+	ERRSRV, ERRaccountexpired, NT_STATUS_ACCOUNT_EXPIRED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_POSSIBLE_DEADLOCK}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NETWORK_CREDENTIAL_CONFLICT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_REMOTE_SESSION_LIMIT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_EVENTLOG_FILE_CHANGED}, {
+	ERRDOS, ERRnoaccess, NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT}, {
+	ERRDOS, ERRnoaccess, NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT}, {
+	ERRDOS, ERRnoaccess, NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT},
+/*	{ This NT error code was 'sqashed'
+	 from NT_STATUS_DOMAIN_TRUST_INCONSISTENT to NT_STATUS_LOGON_FAILURE
+	 during the session setup }  */
+	{
+	ERRDOS, ERRnoaccess, NT_STATUS_DOMAIN_TRUST_INCONSISTENT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_FS_DRIVER_REQUIRED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NO_USER_SESSION_KEY}, {
+	ERRDOS, 59, NT_STATUS_USER_SESSION_DELETED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_RESOURCE_LANG_NOT_FOUND}, {
+	ERRDOS, ERRnoresource, NT_STATUS_INSUFF_SERVER_RESOURCES}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_BUFFER_SIZE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_ADDRESS_COMPONENT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_ADDRESS_WILDCARD}, {
+	ERRDOS, 68, NT_STATUS_TOO_MANY_ADDRESSES}, {
+	ERRDOS, 52, NT_STATUS_ADDRESS_ALREADY_EXISTS}, {
+	ERRDOS, 64, NT_STATUS_ADDRESS_CLOSED}, {
+	ERRDOS, 64, NT_STATUS_CONNECTION_DISCONNECTED}, {
+	ERRDOS, 64, NT_STATUS_CONNECTION_RESET}, {
+	ERRDOS, 68, NT_STATUS_TOO_MANY_NODES}, {
+	ERRDOS, 59, NT_STATUS_TRANSACTION_ABORTED}, {
+	ERRDOS, 59, NT_STATUS_TRANSACTION_TIMED_OUT}, {
+	ERRDOS, 59, NT_STATUS_TRANSACTION_NO_RELEASE}, {
+	ERRDOS, 59, NT_STATUS_TRANSACTION_NO_MATCH}, {
+	ERRDOS, 59, NT_STATUS_TRANSACTION_RESPONDED}, {
+	ERRDOS, 59, NT_STATUS_TRANSACTION_INVALID_ID}, {
+	ERRDOS, 59, NT_STATUS_TRANSACTION_INVALID_TYPE}, {
+	ERRDOS, ERRunsup, NT_STATUS_NOT_SERVER_SESSION}, {
+	ERRDOS, ERRunsup, NT_STATUS_NOT_CLIENT_SESSION}, {
+	ERRHRD, ERRgeneral, NT_STATUS_CANNOT_LOAD_REGISTRY_FILE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_DEBUG_ATTACH_FAILED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_SYSTEM_PROCESS_TERMINATED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_DATA_NOT_ACCEPTED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NO_BROWSER_SERVERS_FOUND}, {
+	ERRHRD, ERRgeneral, NT_STATUS_VDM_HARD_ERROR}, {
+	ERRHRD, ERRgeneral, NT_STATUS_DRIVER_CANCEL_TIMEOUT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_REPLY_MESSAGE_MISMATCH}, {
+	ERRHRD, ERRgeneral, NT_STATUS_MAPPED_ALIGNMENT}, {
+	ERRDOS, 193, NT_STATUS_IMAGE_CHECKSUM_MISMATCH}, {
+	ERRHRD, ERRgeneral, NT_STATUS_LOST_WRITEBEHIND_DATA}, {
+	ERRHRD, ERRgeneral, NT_STATUS_CLIENT_SERVER_PARAMETERS_INVALID}, {
+	ERRSRV, ERRpasswordExpired, NT_STATUS_PASSWORD_MUST_CHANGE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NOT_FOUND}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NOT_TINY_STREAM}, {
+	ERRHRD, ERRgeneral, NT_STATUS_RECOVERY_FAILURE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_STACK_OVERFLOW_READ}, {
+	ERRHRD, ERRgeneral, NT_STATUS_FAIL_CHECK}, {
+	ERRHRD, ERRgeneral, NT_STATUS_DUPLICATE_OBJECTID}, {
+	ERRHRD, ERRgeneral, NT_STATUS_OBJECTID_EXISTS}, {
+	ERRHRD, ERRgeneral, NT_STATUS_CONVERT_TO_LARGE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_RETRY}, {
+	ERRHRD, ERRgeneral, NT_STATUS_FOUND_OUT_OF_SCOPE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_ALLOCATE_BUCKET}, {
+	ERRHRD, ERRgeneral, NT_STATUS_PROPSET_NOT_FOUND}, {
+	ERRHRD, ERRgeneral, NT_STATUS_MARSHALL_OVERFLOW}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_VARIANT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND}, {
+	ERRDOS, ERRnoaccess, NT_STATUS_ACCOUNT_LOCKED_OUT}, {
+	ERRDOS, ERRbadfid, NT_STATUS_HANDLE_NOT_CLOSABLE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_CONNECTION_REFUSED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_GRACEFUL_DISCONNECT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_ADDRESS_ALREADY_ASSOCIATED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_ADDRESS_NOT_ASSOCIATED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_CONNECTION_INVALID}, {
+	ERRHRD, ERRgeneral, NT_STATUS_CONNECTION_ACTIVE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NETWORK_UNREACHABLE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_HOST_UNREACHABLE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_PROTOCOL_UNREACHABLE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_PORT_UNREACHABLE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_REQUEST_ABORTED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_CONNECTION_ABORTED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_BAD_COMPRESSION_BUFFER}, {
+	ERRHRD, ERRgeneral, NT_STATUS_USER_MAPPED_FILE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_AUDIT_FAILED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_TIMER_RESOLUTION_NOT_SET}, {
+	ERRHRD, ERRgeneral, NT_STATUS_CONNECTION_COUNT_LIMIT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_LOGIN_TIME_RESTRICTION}, {
+	ERRHRD, ERRgeneral, NT_STATUS_LOGIN_WKSTA_RESTRICTION}, {
+	ERRDOS, 193, NT_STATUS_IMAGE_MP_UP_MISMATCH}, {
+	ERRHRD, ERRgeneral, 0xc000024a}, {
+	ERRHRD, ERRgeneral, 0xc000024b}, {
+	ERRHRD, ERRgeneral, 0xc000024c}, {
+	ERRHRD, ERRgeneral, 0xc000024d}, {
+	ERRHRD, ERRgeneral, 0xc000024e}, {
+	ERRHRD, ERRgeneral, 0xc000024f}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INSUFFICIENT_LOGON_INFO}, {
+	ERRHRD, ERRgeneral, NT_STATUS_BAD_DLL_ENTRYPOINT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_BAD_SERVICE_ENTRYPOINT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_LPC_REPLY_LOST}, {
+	ERRHRD, ERRgeneral, NT_STATUS_IP_ADDRESS_CONFLICT1}, {
+	ERRHRD, ERRgeneral, NT_STATUS_IP_ADDRESS_CONFLICT2}, {
+	ERRHRD, ERRgeneral, NT_STATUS_REGISTRY_QUOTA_LIMIT}, {
+	ERRSRV, 3, NT_STATUS_PATH_NOT_COVERED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_NO_CALLBACK_ACTIVE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_LICENSE_QUOTA_EXCEEDED}, {
+	ERRHRD, ERRgeneral, NT_STATUS_PWD_TOO_SHORT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_PWD_TOO_RECENT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_PWD_HISTORY_CONFLICT}, {
+	ERRHRD, ERRgeneral, 0xc000025d}, {
+	ERRHRD, ERRgeneral, NT_STATUS_PLUGPLAY_NO_DEVICE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_UNSUPPORTED_COMPRESSION}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_HW_PROFILE}, {
+	ERRHRD, ERRgeneral, NT_STATUS_INVALID_PLUGPLAY_DEVICE_PATH}, {
+	ERRDOS, 182, NT_STATUS_DRIVER_ORDINAL_NOT_FOUND}, {
+	ERRDOS, 127, NT_STATUS_DRIVER_ENTRYPOINT_NOT_FOUND}, {
+	ERRDOS, 288, NT_STATUS_RESOURCE_NOT_OWNED}, {
+	ERRDOS, ErrTooManyLinks, NT_STATUS_TOO_MANY_LINKS}, {
+	ERRHRD, ERRgeneral, NT_STATUS_QUOTA_LIST_INCONSISTENT}, {
+	ERRHRD, ERRgeneral, NT_STATUS_FILE_IS_OFFLINE}, {
+	ERRDOS, 21, 0xc000026e}, {
+	ERRDOS, 161, 0xc0000281}, {
+	ERRDOS, ERRnoaccess, 0xc000028a}, {
+	ERRDOS, ERRnoaccess, 0xc000028b}, {
+	ERRHRD, ERRgeneral, 0xc000028c}, {
+	ERRDOS, ERRnoaccess, 0xc000028d}, {
+	ERRDOS, ERRnoaccess, 0xc000028e}, {
+	ERRDOS, ERRnoaccess, 0xc000028f}, {
+	ERRDOS, ERRnoaccess, 0xc0000290}, {
+	ERRDOS, ERRbadfunc, 0xc000029c}, {
+	ERRDOS, ERRsymlink, NT_STATUS_STOPPED_ON_SYMLINK}, {
+	ERRDOS, ERRinvlevel, 0x007c0001}, {
+	0, 0, 0 }
+};
+
+/*****************************************************************************
+ Print an error message from the status code
+ *****************************************************************************/
+static void
+cifs_print_status(__u32 status_code)
+{
+	int idx = 0;
+
+	while (nt_errs[idx].nt_errstr != NULL) {
+		if (((nt_errs[idx].nt_errcode) & 0xFFFFFF) ==
+		    (status_code & 0xFFFFFF)) {
+			pr_notice("Status code returned 0x%08x %s\n",
+				  status_code, nt_errs[idx].nt_errstr);
+		}
+		idx++;
+	}
+	return;
+}
+
+
+static void
+ntstatus_to_dos(__u32 ntstatus, __u8 *eclass, __u16 *ecode)
+{
+	int i;
+	if (ntstatus == 0) {
+		*eclass = 0;
+		*ecode = 0;
+		return;
+	}
+	for (i = 0; ntstatus_to_dos_map[i].ntstatus; i++) {
+		if (ntstatus == ntstatus_to_dos_map[i].ntstatus) {
+			*eclass = ntstatus_to_dos_map[i].dos_class;
+			*ecode = ntstatus_to_dos_map[i].dos_code;
+			return;
+		}
+	}
+	*eclass = ERRHRD;
+	*ecode = ERRgeneral;
+}
+
+int
+map_smb_to_linux_error(char *buf, bool logErr)
+{
+	struct smb_hdr *smb = (struct smb_hdr *)buf;
+	unsigned int i;
+	int rc = -EIO;	/* if transport error smb error may not be set */
+	__u8 smberrclass;
+	__u16 smberrcode;
+
+	/* BB if NT Status codes - map NT BB */
+
+	/* old style smb error codes */
+	if (smb->Status.CifsError == 0)
+		return 0;
+
+	if (smb->Flags2 & SMBFLG2_ERR_STATUS) {
+		/* translate the newer STATUS codes to old style SMB errors
+		 * and then to POSIX errors */
+		__u32 err = le32_to_cpu(smb->Status.CifsError);
+		if (logErr && (err != (NT_STATUS_MORE_PROCESSING_REQUIRED)))
+			cifs_print_status(err);
+		else if (cifsFYI & CIFS_RC)
+			cifs_print_status(err);
+		ntstatus_to_dos(err, &smberrclass, &smberrcode);
+	} else {
+		smberrclass = smb->Status.DosError.ErrorClass;
+		smberrcode = le16_to_cpu(smb->Status.DosError.Error);
+	}
+
+	/* old style errors */
+
+	/* DOS class smb error codes - map DOS */
+	if (smberrclass == ERRDOS) {
+		/* 1 byte field no need to byte reverse */
+		for (i = 0;
+		     i <
+		     sizeof(mapping_table_ERRDOS) /
+		     sizeof(struct smb_to_posix_error); i++) {
+			if (mapping_table_ERRDOS[i].smb_err == 0)
+				break;
+			else if (mapping_table_ERRDOS[i].smb_err ==
+								smberrcode) {
+				rc = mapping_table_ERRDOS[i].posix_code;
+				break;
+			}
+			/* else try next error mapping one to see if match */
+		}
+	} else if (smberrclass == ERRSRV) {
+		/* server class of error codes */
+		for (i = 0;
+		     i <
+		     sizeof(mapping_table_ERRSRV) /
+		     sizeof(struct smb_to_posix_error); i++) {
+			if (mapping_table_ERRSRV[i].smb_err == 0)
+				break;
+			else if (mapping_table_ERRSRV[i].smb_err ==
+								smberrcode) {
+				rc = mapping_table_ERRSRV[i].posix_code;
+				break;
+			}
+			/* else try next error mapping to see if match */
+		}
+	}
+	/* else ERRHRD class errors or junk  - return EIO */
+
+	cifs_dbg(FYI, "Mapping smb error code 0x%x to POSIX err %d\n",
+		 le32_to_cpu(smb->Status.CifsError), rc);
+
+	/* generic corrective action e.g. reconnect SMB session on
+	 * ERRbaduid could be added */
+
+	return rc;
+}
+
+int
+map_and_check_smb_error(struct mid_q_entry *mid, bool logErr)
+{
+	int rc;
+	struct smb_hdr *smb = (struct smb_hdr *)mid->resp_buf;
+
+	rc = map_smb_to_linux_error((char *)smb, logErr);
+	if (rc == -EACCES && !(smb->Flags2 & SMBFLG2_ERR_STATUS)) {
+		/* possible ERRBaduid */
+		__u8 class = smb->Status.DosError.ErrorClass;
+		__u16 code = le16_to_cpu(smb->Status.DosError.Error);
+
+		/* switch can be used to handle different errors */
+		if (class == ERRSRV && code == ERRbaduid) {
+			cifs_dbg(FYI, "Server returned 0x%x, reconnecting session...\n",
+				code);
+			cifs_signal_cifsd_for_reconnect(mid->server, false);
+		}
+	}
+
+	return rc;
+}
+
+
+/*
+ * calculate the size of the SMB message based on the fixed header
+ * portion, the number of word parameters and the data portion of the message
+ */
+unsigned int
+smbCalcSize(void *buf)
+{
+	struct smb_hdr *ptr = buf;
+	return (sizeof(struct smb_hdr) + (2 * ptr->WordCount) +
+		2 /* size of the bcc field */ + get_bcc(ptr));
+}
+
+/* The following are taken from fs/ntfs/util.c */
+
+#define NTFS_TIME_OFFSET ((u64)(369*365 + 89) * 24 * 3600 * 10000000)
+
+/*
+ * Convert the NT UTC (based 1601-01-01, in hundred nanosecond units)
+ * into Unix UTC (based 1970-01-01, in seconds).
+ */
+struct timespec64
+cifs_NTtimeToUnix(__le64 ntutc)
+{
+	struct timespec64 ts;
+	/* BB what about the timezone? BB */
+
+	/* Subtract the NTFS time offset, then convert to 1s intervals. */
+	s64 t = le64_to_cpu(ntutc) - NTFS_TIME_OFFSET;
+	u64 abs_t;
+
+	/*
+	 * Unfortunately can not use normal 64 bit division on 32 bit arch, but
+	 * the alternative, do_div, does not work with negative numbers so have
+	 * to special case them
+	 */
+	if (t < 0) {
+		abs_t = -t;
+		ts.tv_nsec = (time64_t)(do_div(abs_t, 10000000) * 100);
+		ts.tv_nsec = -ts.tv_nsec;
+		ts.tv_sec = -abs_t;
+	} else {
+		abs_t = t;
+		ts.tv_nsec = (time64_t)do_div(abs_t, 10000000) * 100;
+		ts.tv_sec = abs_t;
+	}
+
+	return ts;
+}
+
+/* Convert the Unix UTC into NT UTC. */
+u64
+cifs_UnixTimeToNT(struct timespec64 t)
+{
+	/* Convert to 100ns intervals and then add the NTFS time offset. */
+	return (u64) t.tv_sec * 10000000 + t.tv_nsec/100 + NTFS_TIME_OFFSET;
+}
+
+static const int total_days_of_prev_months[] = {
+	0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
+};
+
+struct timespec64 cnvrtDosUnixTm(__le16 le_date, __le16 le_time, int offset)
+{
+	struct timespec64 ts;
+	time64_t sec, days;
+	int min, day, month, year;
+	u16 date = le16_to_cpu(le_date);
+	u16 time = le16_to_cpu(le_time);
+	SMB_TIME *st = (SMB_TIME *)&time;
+	SMB_DATE *sd = (SMB_DATE *)&date;
+
+	cifs_dbg(FYI, "date %d time %d\n", date, time);
+
+	sec = 2 * st->TwoSeconds;
+	min = st->Minutes;
+	if ((sec > 59) || (min > 59))
+		cifs_dbg(VFS, "Invalid time min %d sec %lld\n", min, sec);
+	sec += (min * 60);
+	sec += 60 * 60 * st->Hours;
+	if (st->Hours > 24)
+		cifs_dbg(VFS, "Invalid hours %d\n", st->Hours);
+	day = sd->Day;
+	month = sd->Month;
+	if (day < 1 || day > 31 || month < 1 || month > 12) {
+		cifs_dbg(VFS, "Invalid date, month %d day: %d\n", month, day);
+		day = clamp(day, 1, 31);
+		month = clamp(month, 1, 12);
+	}
+	month -= 1;
+	days = day + total_days_of_prev_months[month];
+	days += 3652; /* account for difference in days between 1980 and 1970 */
+	year = sd->Year;
+	days += year * 365;
+	days += (year/4); /* leap year */
+	/* generalized leap year calculation is more complex, ie no leap year
+	for years/100 except for years/400, but since the maximum number for DOS
+	 year is 2**7, the last year is 1980+127, which means we need only
+	 consider 2 special case years, ie the years 2000 and 2100, and only
+	 adjust for the lack of leap year for the year 2100, as 2000 was a
+	 leap year (divisable by 400) */
+	if (year >= 120)  /* the year 2100 */
+		days = days - 1;  /* do not count leap year for the year 2100 */
+
+	/* adjust for leap year where we are still before leap day */
+	if (year != 120)
+		days -= ((year & 0x03) == 0) && (month < 2 ? 1 : 0);
+	sec += 24 * 60 * 60 * days;
+
+	ts.tv_sec = sec + offset;
+
+	/* cifs_dbg(FYI, "sec after cnvrt dos to unix time %d\n",sec); */
+
+	ts.tv_nsec = 0;
+	return ts;
+}
diff --git a/fs/smb/client/nterr.c b/fs/smb/client/nterr.c
new file mode 100644
index 0000000000..358a766375
--- /dev/null
+++ b/fs/smb/client/nterr.c
@@ -0,0 +1,674 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Unix SMB/Netbios implementation.
+ *  Version 1.9.
+ *  RPC Pipe client / server routines
+ *  Copyright (C) Luke Kenneth Casson Leighton 1997-2001.
+ */
+
+/* NT error codes - see nterr.h */
+#include <linux/types.h>
+#include <linux/fs.h>
+#include "nterr.h"
+
+const struct nt_err_code_struct nt_errs[] = {
+	{"NT_STATUS_OK", NT_STATUS_OK},
+	{"NT_STATUS_UNSUCCESSFUL", NT_STATUS_UNSUCCESSFUL},
+	{"NT_STATUS_NOT_IMPLEMENTED", NT_STATUS_NOT_IMPLEMENTED},
+	{"NT_STATUS_INVALID_INFO_CLASS", NT_STATUS_INVALID_INFO_CLASS},
+	{"NT_STATUS_INFO_LENGTH_MISMATCH", NT_STATUS_INFO_LENGTH_MISMATCH},
+	{"NT_STATUS_ACCESS_VIOLATION", NT_STATUS_ACCESS_VIOLATION},
+	{"NT_STATUS_BUFFER_OVERFLOW", NT_STATUS_BUFFER_OVERFLOW},
+	{"NT_STATUS_IN_PAGE_ERROR", NT_STATUS_IN_PAGE_ERROR},
+	{"NT_STATUS_PAGEFILE_QUOTA", NT_STATUS_PAGEFILE_QUOTA},
+	{"NT_STATUS_INVALID_HANDLE", NT_STATUS_INVALID_HANDLE},
+	{"NT_STATUS_BAD_INITIAL_STACK", NT_STATUS_BAD_INITIAL_STACK},
+	{"NT_STATUS_BAD_INITIAL_PC", NT_STATUS_BAD_INITIAL_PC},
+	{"NT_STATUS_INVALID_CID", NT_STATUS_INVALID_CID},
+	{"NT_STATUS_TIMER_NOT_CANCELED", NT_STATUS_TIMER_NOT_CANCELED},
+	{"NT_STATUS_INVALID_PARAMETER", NT_STATUS_INVALID_PARAMETER},
+	{"NT_STATUS_NO_SUCH_DEVICE", NT_STATUS_NO_SUCH_DEVICE},
+	{"NT_STATUS_NO_SUCH_FILE", NT_STATUS_NO_SUCH_FILE},
+	{"NT_STATUS_INVALID_DEVICE_REQUEST",
+	 NT_STATUS_INVALID_DEVICE_REQUEST},
+	{"NT_STATUS_END_OF_FILE", NT_STATUS_END_OF_FILE},
+	{"NT_STATUS_WRONG_VOLUME", NT_STATUS_WRONG_VOLUME},
+	{"NT_STATUS_NO_MEDIA_IN_DEVICE", NT_STATUS_NO_MEDIA_IN_DEVICE},
+	{"NT_STATUS_UNRECOGNIZED_MEDIA", NT_STATUS_UNRECOGNIZED_MEDIA},
+	{"NT_STATUS_NONEXISTENT_SECTOR", NT_STATUS_NONEXISTENT_SECTOR},
+	{"NT_STATUS_MORE_PROCESSING_REQUIRED",
+	 NT_STATUS_MORE_PROCESSING_REQUIRED},
+	{"NT_STATUS_NO_MEMORY", NT_STATUS_NO_MEMORY},
+	{"NT_STATUS_CONFLICTING_ADDRESSES",
+	 NT_STATUS_CONFLICTING_ADDRESSES},
+	{"NT_STATUS_NOT_MAPPED_VIEW", NT_STATUS_NOT_MAPPED_VIEW},
+	{"NT_STATUS_UNABLE_TO_FREE_VM", NT_STATUS_UNABLE_TO_FREE_VM},
+	{"NT_STATUS_UNABLE_TO_DELETE_SECTION",
+	 NT_STATUS_UNABLE_TO_DELETE_SECTION},
+	{"NT_STATUS_INVALID_SYSTEM_SERVICE",
+	 NT_STATUS_INVALID_SYSTEM_SERVICE},
+	{"NT_STATUS_ILLEGAL_INSTRUCTION", NT_STATUS_ILLEGAL_INSTRUCTION},
+	{"NT_STATUS_INVALID_LOCK_SEQUENCE",
+	 NT_STATUS_INVALID_LOCK_SEQUENCE},
+	{"NT_STATUS_INVALID_VIEW_SIZE", NT_STATUS_INVALID_VIEW_SIZE},
+	{"NT_STATUS_INVALID_FILE_FOR_SECTION",
+	 NT_STATUS_INVALID_FILE_FOR_SECTION},
+	{"NT_STATUS_ALREADY_COMMITTED", NT_STATUS_ALREADY_COMMITTED},
+	{"NT_STATUS_ACCESS_DENIED", NT_STATUS_ACCESS_DENIED},
+	{"NT_STATUS_BUFFER_TOO_SMALL", NT_STATUS_BUFFER_TOO_SMALL},
+	{"NT_STATUS_OBJECT_TYPE_MISMATCH", NT_STATUS_OBJECT_TYPE_MISMATCH},
+	{"NT_STATUS_NONCONTINUABLE_EXCEPTION",
+	 NT_STATUS_NONCONTINUABLE_EXCEPTION},
+	{"NT_STATUS_INVALID_DISPOSITION", NT_STATUS_INVALID_DISPOSITION},
+	{"NT_STATUS_UNWIND", NT_STATUS_UNWIND},
+	{"NT_STATUS_BAD_STACK", NT_STATUS_BAD_STACK},
+	{"NT_STATUS_INVALID_UNWIND_TARGET",
+	 NT_STATUS_INVALID_UNWIND_TARGET},
+	{"NT_STATUS_NOT_LOCKED", NT_STATUS_NOT_LOCKED},
+	{"NT_STATUS_PARITY_ERROR", NT_STATUS_PARITY_ERROR},
+	{"NT_STATUS_UNABLE_TO_DECOMMIT_VM",
+	 NT_STATUS_UNABLE_TO_DECOMMIT_VM},
+	{"NT_STATUS_NOT_COMMITTED", NT_STATUS_NOT_COMMITTED},
+	{"NT_STATUS_INVALID_PORT_ATTRIBUTES",
+	 NT_STATUS_INVALID_PORT_ATTRIBUTES},
+	{"NT_STATUS_PORT_MESSAGE_TOO_LONG",
+	 NT_STATUS_PORT_MESSAGE_TOO_LONG},
+	{"NT_STATUS_INVALID_PARAMETER_MIX",
+	 NT_STATUS_INVALID_PARAMETER_MIX},
+	{"NT_STATUS_INVALID_QUOTA_LOWER", NT_STATUS_INVALID_QUOTA_LOWER},
+	{"NT_STATUS_DISK_CORRUPT_ERROR", NT_STATUS_DISK_CORRUPT_ERROR},
+	{"NT_STATUS_OBJECT_NAME_INVALID", NT_STATUS_OBJECT_NAME_INVALID},
+	{"NT_STATUS_OBJECT_NAME_NOT_FOUND",
+	 NT_STATUS_OBJECT_NAME_NOT_FOUND},
+	{"NT_STATUS_OBJECT_NAME_COLLISION",
+	 NT_STATUS_OBJECT_NAME_COLLISION},
+	{"NT_STATUS_HANDLE_NOT_WAITABLE", NT_STATUS_HANDLE_NOT_WAITABLE},
+	{"NT_STATUS_PORT_DISCONNECTED", NT_STATUS_PORT_DISCONNECTED},
+	{"NT_STATUS_DEVICE_ALREADY_ATTACHED",
+	 NT_STATUS_DEVICE_ALREADY_ATTACHED},
+	{"NT_STATUS_OBJECT_PATH_INVALID", NT_STATUS_OBJECT_PATH_INVALID},
+	{"NT_STATUS_OBJECT_PATH_NOT_FOUND",
+	 NT_STATUS_OBJECT_PATH_NOT_FOUND},
+	{"NT_STATUS_OBJECT_PATH_SYNTAX_BAD",
+	 NT_STATUS_OBJECT_PATH_SYNTAX_BAD},
+	{"NT_STATUS_DATA_OVERRUN", NT_STATUS_DATA_OVERRUN},
+	{"NT_STATUS_DATA_LATE_ERROR", NT_STATUS_DATA_LATE_ERROR},
+	{"NT_STATUS_DATA_ERROR", NT_STATUS_DATA_ERROR},
+	{"NT_STATUS_CRC_ERROR", NT_STATUS_CRC_ERROR},
+	{"NT_STATUS_SECTION_TOO_BIG", NT_STATUS_SECTION_TOO_BIG},
+	{"NT_STATUS_PORT_CONNECTION_REFUSED",
+	 NT_STATUS_PORT_CONNECTION_REFUSED},
+	{"NT_STATUS_INVALID_PORT_HANDLE", NT_STATUS_INVALID_PORT_HANDLE},
+	{"NT_STATUS_SHARING_VIOLATION", NT_STATUS_SHARING_VIOLATION},
+	{"NT_STATUS_QUOTA_EXCEEDED", NT_STATUS_QUOTA_EXCEEDED},
+	{"NT_STATUS_INVALID_PAGE_PROTECTION",
+	 NT_STATUS_INVALID_PAGE_PROTECTION},
+	{"NT_STATUS_MUTANT_NOT_OWNED", NT_STATUS_MUTANT_NOT_OWNED},
+	{"NT_STATUS_SEMAPHORE_LIMIT_EXCEEDED",
+	 NT_STATUS_SEMAPHORE_LIMIT_EXCEEDED},
+	{"NT_STATUS_PORT_ALREADY_SET", NT_STATUS_PORT_ALREADY_SET},
+	{"NT_STATUS_SECTION_NOT_IMAGE", NT_STATUS_SECTION_NOT_IMAGE},
+	{"NT_STATUS_SUSPEND_COUNT_EXCEEDED",
+	 NT_STATUS_SUSPEND_COUNT_EXCEEDED},
+	{"NT_STATUS_THREAD_IS_TERMINATING",
+	 NT_STATUS_THREAD_IS_TERMINATING},
+	{"NT_STATUS_BAD_WORKING_SET_LIMIT",
+	 NT_STATUS_BAD_WORKING_SET_LIMIT},
+	{"NT_STATUS_INCOMPATIBLE_FILE_MAP",
+	 NT_STATUS_INCOMPATIBLE_FILE_MAP},
+	{"NT_STATUS_SECTION_PROTECTION", NT_STATUS_SECTION_PROTECTION},
+	{"NT_STATUS_EAS_NOT_SUPPORTED", NT_STATUS_EAS_NOT_SUPPORTED},
+	{"NT_STATUS_EA_TOO_LARGE", NT_STATUS_EA_TOO_LARGE},
+	{"NT_STATUS_NONEXISTENT_EA_ENTRY", NT_STATUS_NONEXISTENT_EA_ENTRY},
+	{"NT_STATUS_NO_EAS_ON_FILE", NT_STATUS_NO_EAS_ON_FILE},
+	{"NT_STATUS_EA_CORRUPT_ERROR", NT_STATUS_EA_CORRUPT_ERROR},
+	{"NT_STATUS_FILE_LOCK_CONFLICT", NT_STATUS_FILE_LOCK_CONFLICT},
+	{"NT_STATUS_LOCK_NOT_GRANTED", NT_STATUS_LOCK_NOT_GRANTED},
+	{"NT_STATUS_DELETE_PENDING", NT_STATUS_DELETE_PENDING},
+	{"NT_STATUS_CTL_FILE_NOT_SUPPORTED",
+	 NT_STATUS_CTL_FILE_NOT_SUPPORTED},
+	{"NT_STATUS_UNKNOWN_REVISION", NT_STATUS_UNKNOWN_REVISION},
+	{"NT_STATUS_REVISION_MISMATCH", NT_STATUS_REVISION_MISMATCH},
+	{"NT_STATUS_INVALID_OWNER", NT_STATUS_INVALID_OWNER},
+	{"NT_STATUS_INVALID_PRIMARY_GROUP",
+	 NT_STATUS_INVALID_PRIMARY_GROUP},
+	{"NT_STATUS_NO_IMPERSONATION_TOKEN",
+	 NT_STATUS_NO_IMPERSONATION_TOKEN},
+	{"NT_STATUS_CANT_DISABLE_MANDATORY",
+	 NT_STATUS_CANT_DISABLE_MANDATORY},
+	{"NT_STATUS_NO_LOGON_SERVERS", NT_STATUS_NO_LOGON_SERVERS},
+	{"NT_STATUS_NO_SUCH_LOGON_SESSION",
+	 NT_STATUS_NO_SUCH_LOGON_SESSION},
+	{"NT_STATUS_NO_SUCH_PRIVILEGE", NT_STATUS_NO_SUCH_PRIVILEGE},
+	{"NT_STATUS_PRIVILEGE_NOT_HELD", NT_STATUS_PRIVILEGE_NOT_HELD},
+	{"NT_STATUS_INVALID_ACCOUNT_NAME", NT_STATUS_INVALID_ACCOUNT_NAME},
+	{"NT_STATUS_USER_EXISTS", NT_STATUS_USER_EXISTS},
+	{"NT_STATUS_NO_SUCH_USER", NT_STATUS_NO_SUCH_USER},
+	{"NT_STATUS_GROUP_EXISTS", NT_STATUS_GROUP_EXISTS},
+	{"NT_STATUS_NO_SUCH_GROUP", NT_STATUS_NO_SUCH_GROUP},
+	{"NT_STATUS_MEMBER_IN_GROUP", NT_STATUS_MEMBER_IN_GROUP},
+	{"NT_STATUS_MEMBER_NOT_IN_GROUP", NT_STATUS_MEMBER_NOT_IN_GROUP},
+	{"NT_STATUS_LAST_ADMIN", NT_STATUS_LAST_ADMIN},
+	{"NT_STATUS_WRONG_PASSWORD", NT_STATUS_WRONG_PASSWORD},
+	{"NT_STATUS_ILL_FORMED_PASSWORD", NT_STATUS_ILL_FORMED_PASSWORD},
+	{"NT_STATUS_PASSWORD_RESTRICTION", NT_STATUS_PASSWORD_RESTRICTION},
+	{"NT_STATUS_LOGON_FAILURE", NT_STATUS_LOGON_FAILURE},
+	{"NT_STATUS_ACCOUNT_RESTRICTION", NT_STATUS_ACCOUNT_RESTRICTION},
+	{"NT_STATUS_INVALID_LOGON_HOURS", NT_STATUS_INVALID_LOGON_HOURS},
+	{"NT_STATUS_INVALID_WORKSTATION", NT_STATUS_INVALID_WORKSTATION},
+	{"NT_STATUS_PASSWORD_EXPIRED", NT_STATUS_PASSWORD_EXPIRED},
+	{"NT_STATUS_ACCOUNT_DISABLED", NT_STATUS_ACCOUNT_DISABLED},
+	{"NT_STATUS_NONE_MAPPED", NT_STATUS_NONE_MAPPED},
+	{"NT_STATUS_TOO_MANY_LUIDS_REQUESTED",
+	 NT_STATUS_TOO_MANY_LUIDS_REQUESTED},
+	{"NT_STATUS_LUIDS_EXHAUSTED", NT_STATUS_LUIDS_EXHAUSTED},
+	{"NT_STATUS_INVALID_SUB_AUTHORITY",
+	 NT_STATUS_INVALID_SUB_AUTHORITY},
+	{"NT_STATUS_INVALID_ACL", NT_STATUS_INVALID_ACL},
+	{"NT_STATUS_INVALID_SID", NT_STATUS_INVALID_SID},
+	{"NT_STATUS_INVALID_SECURITY_DESCR",
+	 NT_STATUS_INVALID_SECURITY_DESCR},
+	{"NT_STATUS_PROCEDURE_NOT_FOUND", NT_STATUS_PROCEDURE_NOT_FOUND},
+	{"NT_STATUS_INVALID_IMAGE_FORMAT", NT_STATUS_INVALID_IMAGE_FORMAT},
+	{"NT_STATUS_NO_TOKEN", NT_STATUS_NO_TOKEN},
+	{"NT_STATUS_BAD_INHERITANCE_ACL", NT_STATUS_BAD_INHERITANCE_ACL},
+	{"NT_STATUS_RANGE_NOT_LOCKED", NT_STATUS_RANGE_NOT_LOCKED},
+	{"NT_STATUS_DISK_FULL", NT_STATUS_DISK_FULL},
+	{"NT_STATUS_SERVER_DISABLED", NT_STATUS_SERVER_DISABLED},
+	{"NT_STATUS_SERVER_NOT_DISABLED", NT_STATUS_SERVER_NOT_DISABLED},
+	{"NT_STATUS_TOO_MANY_GUIDS_REQUESTED",
+	 NT_STATUS_TOO_MANY_GUIDS_REQUESTED},
+	{"NT_STATUS_GUIDS_EXHAUSTED", NT_STATUS_GUIDS_EXHAUSTED},
+	{"NT_STATUS_INVALID_ID_AUTHORITY", NT_STATUS_INVALID_ID_AUTHORITY},
+	{"NT_STATUS_AGENTS_EXHAUSTED", NT_STATUS_AGENTS_EXHAUSTED},
+	{"NT_STATUS_INVALID_VOLUME_LABEL", NT_STATUS_INVALID_VOLUME_LABEL},
+	{"NT_STATUS_SECTION_NOT_EXTENDED", NT_STATUS_SECTION_NOT_EXTENDED},
+	{"NT_STATUS_NOT_MAPPED_DATA", NT_STATUS_NOT_MAPPED_DATA},
+	{"NT_STATUS_RESOURCE_DATA_NOT_FOUND",
+	 NT_STATUS_RESOURCE_DATA_NOT_FOUND},
+	{"NT_STATUS_RESOURCE_TYPE_NOT_FOUND",
+	 NT_STATUS_RESOURCE_TYPE_NOT_FOUND},
+	{"NT_STATUS_RESOURCE_NAME_NOT_FOUND",
+	 NT_STATUS_RESOURCE_NAME_NOT_FOUND},
+	{"NT_STATUS_ARRAY_BOUNDS_EXCEEDED",
+	 NT_STATUS_ARRAY_BOUNDS_EXCEEDED},
+	{"NT_STATUS_FLOAT_DENORMAL_OPERAND",
+	 NT_STATUS_FLOAT_DENORMAL_OPERAND},
+	{"NT_STATUS_FLOAT_DIVIDE_BY_ZERO", NT_STATUS_FLOAT_DIVIDE_BY_ZERO},
+	{"NT_STATUS_FLOAT_INEXACT_RESULT", NT_STATUS_FLOAT_INEXACT_RESULT},
+	{"NT_STATUS_FLOAT_INVALID_OPERATION",
+	 NT_STATUS_FLOAT_INVALID_OPERATION},
+	{"NT_STATUS_FLOAT_OVERFLOW", NT_STATUS_FLOAT_OVERFLOW},
+	{"NT_STATUS_FLOAT_STACK_CHECK", NT_STATUS_FLOAT_STACK_CHECK},
+	{"NT_STATUS_FLOAT_UNDERFLOW", NT_STATUS_FLOAT_UNDERFLOW},
+	{"NT_STATUS_INTEGER_DIVIDE_BY_ZERO",
+	 NT_STATUS_INTEGER_DIVIDE_BY_ZERO},
+	{"NT_STATUS_INTEGER_OVERFLOW", NT_STATUS_INTEGER_OVERFLOW},
+	{"NT_STATUS_PRIVILEGED_INSTRUCTION",
+	 NT_STATUS_PRIVILEGED_INSTRUCTION},
+	{"NT_STATUS_TOO_MANY_PAGING_FILES",
+	 NT_STATUS_TOO_MANY_PAGING_FILES},
+	{"NT_STATUS_FILE_INVALID", NT_STATUS_FILE_INVALID},
+	{"NT_STATUS_ALLOTTED_SPACE_EXCEEDED",
+	 NT_STATUS_ALLOTTED_SPACE_EXCEEDED},
+	{"NT_STATUS_INSUFFICIENT_RESOURCES",
+	 NT_STATUS_INSUFFICIENT_RESOURCES},
+	{"NT_STATUS_DFS_EXIT_PATH_FOUND", NT_STATUS_DFS_EXIT_PATH_FOUND},
+	{"NT_STATUS_DEVICE_DATA_ERROR", NT_STATUS_DEVICE_DATA_ERROR},
+	{"NT_STATUS_DEVICE_NOT_CONNECTED", NT_STATUS_DEVICE_NOT_CONNECTED},
+	{"NT_STATUS_DEVICE_POWER_FAILURE", NT_STATUS_DEVICE_POWER_FAILURE},
+	{"NT_STATUS_FREE_VM_NOT_AT_BASE", NT_STATUS_FREE_VM_NOT_AT_BASE},
+	{"NT_STATUS_MEMORY_NOT_ALLOCATED", NT_STATUS_MEMORY_NOT_ALLOCATED},
+	{"NT_STATUS_WORKING_SET_QUOTA", NT_STATUS_WORKING_SET_QUOTA},
+	{"NT_STATUS_MEDIA_WRITE_PROTECTED",
+	 NT_STATUS_MEDIA_WRITE_PROTECTED},
+	{"NT_STATUS_DEVICE_NOT_READY", NT_STATUS_DEVICE_NOT_READY},
+	{"NT_STATUS_INVALID_GROUP_ATTRIBUTES",
+	 NT_STATUS_INVALID_GROUP_ATTRIBUTES},
+	{"NT_STATUS_BAD_IMPERSONATION_LEVEL",
+	 NT_STATUS_BAD_IMPERSONATION_LEVEL},
+	{"NT_STATUS_CANT_OPEN_ANONYMOUS", NT_STATUS_CANT_OPEN_ANONYMOUS},
+	{"NT_STATUS_BAD_VALIDATION_CLASS", NT_STATUS_BAD_VALIDATION_CLASS},
+	{"NT_STATUS_BAD_TOKEN_TYPE", NT_STATUS_BAD_TOKEN_TYPE},
+	{"NT_STATUS_BAD_MASTER_BOOT_RECORD",
+	 NT_STATUS_BAD_MASTER_BOOT_RECORD},
+	{"NT_STATUS_INSTRUCTION_MISALIGNMENT",
+	 NT_STATUS_INSTRUCTION_MISALIGNMENT},
+	{"NT_STATUS_INSTANCE_NOT_AVAILABLE",
+	 NT_STATUS_INSTANCE_NOT_AVAILABLE},
+	{"NT_STATUS_PIPE_NOT_AVAILABLE", NT_STATUS_PIPE_NOT_AVAILABLE},
+	{"NT_STATUS_INVALID_PIPE_STATE", NT_STATUS_INVALID_PIPE_STATE},
+	{"NT_STATUS_PIPE_BUSY", NT_STATUS_PIPE_BUSY},
+	{"NT_STATUS_ILLEGAL_FUNCTION", NT_STATUS_ILLEGAL_FUNCTION},
+	{"NT_STATUS_PIPE_DISCONNECTED", NT_STATUS_PIPE_DISCONNECTED},
+	{"NT_STATUS_PIPE_CLOSING", NT_STATUS_PIPE_CLOSING},
+	{"NT_STATUS_PIPE_CONNECTED", NT_STATUS_PIPE_CONNECTED},
+	{"NT_STATUS_PIPE_LISTENING", NT_STATUS_PIPE_LISTENING},
+	{"NT_STATUS_INVALID_READ_MODE", NT_STATUS_INVALID_READ_MODE},
+	{"NT_STATUS_IO_TIMEOUT", NT_STATUS_IO_TIMEOUT},
+	{"NT_STATUS_FILE_FORCED_CLOSED", NT_STATUS_FILE_FORCED_CLOSED},
+	{"NT_STATUS_PROFILING_NOT_STARTED",
+	 NT_STATUS_PROFILING_NOT_STARTED},
+	{"NT_STATUS_PROFILING_NOT_STOPPED",
+	 NT_STATUS_PROFILING_NOT_STOPPED},
+	{"NT_STATUS_COULD_NOT_INTERPRET", NT_STATUS_COULD_NOT_INTERPRET},
+	{"NT_STATUS_FILE_IS_A_DIRECTORY", NT_STATUS_FILE_IS_A_DIRECTORY},
+	{"NT_STATUS_NOT_SUPPORTED", NT_STATUS_NOT_SUPPORTED},
+	{"NT_STATUS_REMOTE_NOT_LISTENING", NT_STATUS_REMOTE_NOT_LISTENING},
+	{"NT_STATUS_DUPLICATE_NAME", NT_STATUS_DUPLICATE_NAME},
+	{"NT_STATUS_BAD_NETWORK_PATH", NT_STATUS_BAD_NETWORK_PATH},
+	{"NT_STATUS_NETWORK_BUSY", NT_STATUS_NETWORK_BUSY},
+	{"NT_STATUS_DEVICE_DOES_NOT_EXIST",
+	 NT_STATUS_DEVICE_DOES_NOT_EXIST},
+	{"NT_STATUS_TOO_MANY_COMMANDS", NT_STATUS_TOO_MANY_COMMANDS},
+	{"NT_STATUS_ADAPTER_HARDWARE_ERROR",
+	 NT_STATUS_ADAPTER_HARDWARE_ERROR},
+	{"NT_STATUS_INVALID_NETWORK_RESPONSE",
+	 NT_STATUS_INVALID_NETWORK_RESPONSE},
+	{"NT_STATUS_UNEXPECTED_NETWORK_ERROR",
+	 NT_STATUS_UNEXPECTED_NETWORK_ERROR},
+	{"NT_STATUS_BAD_REMOTE_ADAPTER", NT_STATUS_BAD_REMOTE_ADAPTER},
+	{"NT_STATUS_PRINT_QUEUE_FULL", NT_STATUS_PRINT_QUEUE_FULL},
+	{"NT_STATUS_NO_SPOOL_SPACE", NT_STATUS_NO_SPOOL_SPACE},
+	{"NT_STATUS_PRINT_CANCELLED", NT_STATUS_PRINT_CANCELLED},
+	{"NT_STATUS_NETWORK_NAME_DELETED", NT_STATUS_NETWORK_NAME_DELETED},
+	{"NT_STATUS_NETWORK_ACCESS_DENIED",
+	 NT_STATUS_NETWORK_ACCESS_DENIED},
+	{"NT_STATUS_BAD_DEVICE_TYPE", NT_STATUS_BAD_DEVICE_TYPE},
+	{"NT_STATUS_BAD_NETWORK_NAME", NT_STATUS_BAD_NETWORK_NAME},
+	{"NT_STATUS_TOO_MANY_NAMES", NT_STATUS_TOO_MANY_NAMES},
+	{"NT_STATUS_TOO_MANY_SESSIONS", NT_STATUS_TOO_MANY_SESSIONS},
+	{"NT_STATUS_SHARING_PAUSED", NT_STATUS_SHARING_PAUSED},
+	{"NT_STATUS_REQUEST_NOT_ACCEPTED", NT_STATUS_REQUEST_NOT_ACCEPTED},
+	{"NT_STATUS_REDIRECTOR_PAUSED", NT_STATUS_REDIRECTOR_PAUSED},
+	{"NT_STATUS_NET_WRITE_FAULT", NT_STATUS_NET_WRITE_FAULT},
+	{"NT_STATUS_PROFILING_AT_LIMIT", NT_STATUS_PROFILING_AT_LIMIT},
+	{"NT_STATUS_NOT_SAME_DEVICE", NT_STATUS_NOT_SAME_DEVICE},
+	{"NT_STATUS_FILE_RENAMED", NT_STATUS_FILE_RENAMED},
+	{"NT_STATUS_VIRTUAL_CIRCUIT_CLOSED",
+	 NT_STATUS_VIRTUAL_CIRCUIT_CLOSED},
+	{"NT_STATUS_NO_SECURITY_ON_OBJECT",
+	 NT_STATUS_NO_SECURITY_ON_OBJECT},
+	{"NT_STATUS_CANT_WAIT", NT_STATUS_CANT_WAIT},
+	{"NT_STATUS_PIPE_EMPTY", NT_STATUS_PIPE_EMPTY},
+	{"NT_STATUS_CANT_ACCESS_DOMAIN_INFO",
+	 NT_STATUS_CANT_ACCESS_DOMAIN_INFO},
+	{"NT_STATUS_CANT_TERMINATE_SELF", NT_STATUS_CANT_TERMINATE_SELF},
+	{"NT_STATUS_INVALID_SERVER_STATE", NT_STATUS_INVALID_SERVER_STATE},
+	{"NT_STATUS_INVALID_DOMAIN_STATE", NT_STATUS_INVALID_DOMAIN_STATE},
+	{"NT_STATUS_INVALID_DOMAIN_ROLE", NT_STATUS_INVALID_DOMAIN_ROLE},
+	{"NT_STATUS_NO_SUCH_DOMAIN", NT_STATUS_NO_SUCH_DOMAIN},
+	{"NT_STATUS_DOMAIN_EXISTS", NT_STATUS_DOMAIN_EXISTS},
+	{"NT_STATUS_DOMAIN_LIMIT_EXCEEDED",
+	 NT_STATUS_DOMAIN_LIMIT_EXCEEDED},
+	{"NT_STATUS_OPLOCK_NOT_GRANTED", NT_STATUS_OPLOCK_NOT_GRANTED},
+	{"NT_STATUS_INVALID_OPLOCK_PROTOCOL",
+	 NT_STATUS_INVALID_OPLOCK_PROTOCOL},
+	{"NT_STATUS_INTERNAL_DB_CORRUPTION",
+	 NT_STATUS_INTERNAL_DB_CORRUPTION},
+	{"NT_STATUS_INTERNAL_ERROR", NT_STATUS_INTERNAL_ERROR},
+	{"NT_STATUS_GENERIC_NOT_MAPPED", NT_STATUS_GENERIC_NOT_MAPPED},
+	{"NT_STATUS_BAD_DESCRIPTOR_FORMAT",
+	 NT_STATUS_BAD_DESCRIPTOR_FORMAT},
+	{"NT_STATUS_INVALID_USER_BUFFER", NT_STATUS_INVALID_USER_BUFFER},
+	{"NT_STATUS_UNEXPECTED_IO_ERROR", NT_STATUS_UNEXPECTED_IO_ERROR},
+	{"NT_STATUS_UNEXPECTED_MM_CREATE_ERR",
+	 NT_STATUS_UNEXPECTED_MM_CREATE_ERR},
+	{"NT_STATUS_UNEXPECTED_MM_MAP_ERROR",
+	 NT_STATUS_UNEXPECTED_MM_MAP_ERROR},
+	{"NT_STATUS_UNEXPECTED_MM_EXTEND_ERR",
+	 NT_STATUS_UNEXPECTED_MM_EXTEND_ERR},
+	{"NT_STATUS_NOT_LOGON_PROCESS", NT_STATUS_NOT_LOGON_PROCESS},
+	{"NT_STATUS_LOGON_SESSION_EXISTS", NT_STATUS_LOGON_SESSION_EXISTS},
+	{"NT_STATUS_INVALID_PARAMETER_1", NT_STATUS_INVALID_PARAMETER_1},
+	{"NT_STATUS_INVALID_PARAMETER_2", NT_STATUS_INVALID_PARAMETER_2},
+	{"NT_STATUS_INVALID_PARAMETER_3", NT_STATUS_INVALID_PARAMETER_3},
+	{"NT_STATUS_INVALID_PARAMETER_4", NT_STATUS_INVALID_PARAMETER_4},
+	{"NT_STATUS_INVALID_PARAMETER_5", NT_STATUS_INVALID_PARAMETER_5},
+	{"NT_STATUS_INVALID_PARAMETER_6", NT_STATUS_INVALID_PARAMETER_6},
+	{"NT_STATUS_INVALID_PARAMETER_7", NT_STATUS_INVALID_PARAMETER_7},
+	{"NT_STATUS_INVALID_PARAMETER_8", NT_STATUS_INVALID_PARAMETER_8},
+	{"NT_STATUS_INVALID_PARAMETER_9", NT_STATUS_INVALID_PARAMETER_9},
+	{"NT_STATUS_INVALID_PARAMETER_10", NT_STATUS_INVALID_PARAMETER_10},
+	{"NT_STATUS_INVALID_PARAMETER_11", NT_STATUS_INVALID_PARAMETER_11},
+	{"NT_STATUS_INVALID_PARAMETER_12", NT_STATUS_INVALID_PARAMETER_12},
+	{"NT_STATUS_REDIRECTOR_NOT_STARTED",
+	 NT_STATUS_REDIRECTOR_NOT_STARTED},
+	{"NT_STATUS_REDIRECTOR_STARTED", NT_STATUS_REDIRECTOR_STARTED},
+	{"NT_STATUS_STACK_OVERFLOW", NT_STATUS_STACK_OVERFLOW},
+	{"NT_STATUS_NO_SUCH_PACKAGE", NT_STATUS_NO_SUCH_PACKAGE},
+	{"NT_STATUS_BAD_FUNCTION_TABLE", NT_STATUS_BAD_FUNCTION_TABLE},
+	{"NT_STATUS_DIRECTORY_NOT_EMPTY", NT_STATUS_DIRECTORY_NOT_EMPTY},
+	{"NT_STATUS_FILE_CORRUPT_ERROR", NT_STATUS_FILE_CORRUPT_ERROR},
+	{"NT_STATUS_NOT_A_DIRECTORY", NT_STATUS_NOT_A_DIRECTORY},
+	{"NT_STATUS_BAD_LOGON_SESSION_STATE",
+	 NT_STATUS_BAD_LOGON_SESSION_STATE},
+	{"NT_STATUS_LOGON_SESSION_COLLISION",
+	 NT_STATUS_LOGON_SESSION_COLLISION},
+	{"NT_STATUS_NAME_TOO_LONG", NT_STATUS_NAME_TOO_LONG},
+	{"NT_STATUS_FILES_OPEN", NT_STATUS_FILES_OPEN},
+	{"NT_STATUS_CONNECTION_IN_USE", NT_STATUS_CONNECTION_IN_USE},
+	{"NT_STATUS_MESSAGE_NOT_FOUND", NT_STATUS_MESSAGE_NOT_FOUND},
+	{"NT_STATUS_PROCESS_IS_TERMINATING",
+	 NT_STATUS_PROCESS_IS_TERMINATING},
+	{"NT_STATUS_INVALID_LOGON_TYPE", NT_STATUS_INVALID_LOGON_TYPE},
+	{"NT_STATUS_NO_GUID_TRANSLATION", NT_STATUS_NO_GUID_TRANSLATION},
+	{"NT_STATUS_CANNOT_IMPERSONATE", NT_STATUS_CANNOT_IMPERSONATE},
+	{"NT_STATUS_IMAGE_ALREADY_LOADED", NT_STATUS_IMAGE_ALREADY_LOADED},
+	{"NT_STATUS_ABIOS_NOT_PRESENT", NT_STATUS_ABIOS_NOT_PRESENT},
+	{"NT_STATUS_ABIOS_LID_NOT_EXIST", NT_STATUS_ABIOS_LID_NOT_EXIST},
+	{"NT_STATUS_ABIOS_LID_ALREADY_OWNED",
+	 NT_STATUS_ABIOS_LID_ALREADY_OWNED},
+	{"NT_STATUS_ABIOS_NOT_LID_OWNER", NT_STATUS_ABIOS_NOT_LID_OWNER},
+	{"NT_STATUS_ABIOS_INVALID_COMMAND",
+	 NT_STATUS_ABIOS_INVALID_COMMAND},
+	{"NT_STATUS_ABIOS_INVALID_LID", NT_STATUS_ABIOS_INVALID_LID},
+	{"NT_STATUS_ABIOS_SELECTOR_NOT_AVAILABLE",
+	 NT_STATUS_ABIOS_SELECTOR_NOT_AVAILABLE},
+	{"NT_STATUS_ABIOS_INVALID_SELECTOR",
+	 NT_STATUS_ABIOS_INVALID_SELECTOR},
+	{"NT_STATUS_NO_LDT", NT_STATUS_NO_LDT},
+	{"NT_STATUS_INVALID_LDT_SIZE", NT_STATUS_INVALID_LDT_SIZE},
+	{"NT_STATUS_INVALID_LDT_OFFSET", NT_STATUS_INVALID_LDT_OFFSET},
+	{"NT_STATUS_INVALID_LDT_DESCRIPTOR",
+	 NT_STATUS_INVALID_LDT_DESCRIPTOR},
+	{"NT_STATUS_INVALID_IMAGE_NE_FORMAT",
+	 NT_STATUS_INVALID_IMAGE_NE_FORMAT},
+	{"NT_STATUS_RXACT_INVALID_STATE", NT_STATUS_RXACT_INVALID_STATE},
+	{"NT_STATUS_RXACT_COMMIT_FAILURE", NT_STATUS_RXACT_COMMIT_FAILURE},
+	{"NT_STATUS_MAPPED_FILE_SIZE_ZERO",
+	 NT_STATUS_MAPPED_FILE_SIZE_ZERO},
+	{"NT_STATUS_TOO_MANY_OPENED_FILES",
+	 NT_STATUS_TOO_MANY_OPENED_FILES},
+	{"NT_STATUS_CANCELLED", NT_STATUS_CANCELLED},
+	{"NT_STATUS_CANNOT_DELETE", NT_STATUS_CANNOT_DELETE},
+	{"NT_STATUS_INVALID_COMPUTER_NAME",
+	 NT_STATUS_INVALID_COMPUTER_NAME},
+	{"NT_STATUS_FILE_DELETED", NT_STATUS_FILE_DELETED},
+	{"NT_STATUS_SPECIAL_ACCOUNT", NT_STATUS_SPECIAL_ACCOUNT},
+	{"NT_STATUS_SPECIAL_GROUP", NT_STATUS_SPECIAL_GROUP},
+	{"NT_STATUS_SPECIAL_USER", NT_STATUS_SPECIAL_USER},
+	{"NT_STATUS_MEMBERS_PRIMARY_GROUP",
+	 NT_STATUS_MEMBERS_PRIMARY_GROUP},
+	{"NT_STATUS_FILE_CLOSED", NT_STATUS_FILE_CLOSED},
+	{"NT_STATUS_TOO_MANY_THREADS", NT_STATUS_TOO_MANY_THREADS},
+	{"NT_STATUS_THREAD_NOT_IN_PROCESS",
+	 NT_STATUS_THREAD_NOT_IN_PROCESS},
+	{"NT_STATUS_TOKEN_ALREADY_IN_USE", NT_STATUS_TOKEN_ALREADY_IN_USE},
+	{"NT_STATUS_PAGEFILE_QUOTA_EXCEEDED",
+	 NT_STATUS_PAGEFILE_QUOTA_EXCEEDED},
+	{"NT_STATUS_COMMITMENT_LIMIT", NT_STATUS_COMMITMENT_LIMIT},
+	{"NT_STATUS_INVALID_IMAGE_LE_FORMAT",
+	 NT_STATUS_INVALID_IMAGE_LE_FORMAT},
+	{"NT_STATUS_INVALID_IMAGE_NOT_MZ", NT_STATUS_INVALID_IMAGE_NOT_MZ},
+	{"NT_STATUS_INVALID_IMAGE_PROTECT",
+	 NT_STATUS_INVALID_IMAGE_PROTECT},
+	{"NT_STATUS_INVALID_IMAGE_WIN_16", NT_STATUS_INVALID_IMAGE_WIN_16},
+	{"NT_STATUS_LOGON_SERVER_CONFLICT",
+	 NT_STATUS_LOGON_SERVER_CONFLICT},
+	{"NT_STATUS_TIME_DIFFERENCE_AT_DC",
+	 NT_STATUS_TIME_DIFFERENCE_AT_DC},
+	{"NT_STATUS_SYNCHRONIZATION_REQUIRED",
+	 NT_STATUS_SYNCHRONIZATION_REQUIRED},
+	{"NT_STATUS_DLL_NOT_FOUND", NT_STATUS_DLL_NOT_FOUND},
+	{"NT_STATUS_OPEN_FAILED", NT_STATUS_OPEN_FAILED},
+	{"NT_STATUS_IO_PRIVILEGE_FAILED", NT_STATUS_IO_PRIVILEGE_FAILED},
+	{"NT_STATUS_ORDINAL_NOT_FOUND", NT_STATUS_ORDINAL_NOT_FOUND},
+	{"NT_STATUS_ENTRYPOINT_NOT_FOUND", NT_STATUS_ENTRYPOINT_NOT_FOUND},
+	{"NT_STATUS_CONTROL_C_EXIT", NT_STATUS_CONTROL_C_EXIT},
+	{"NT_STATUS_LOCAL_DISCONNECT", NT_STATUS_LOCAL_DISCONNECT},
+	{"NT_STATUS_REMOTE_DISCONNECT", NT_STATUS_REMOTE_DISCONNECT},
+	{"NT_STATUS_REMOTE_RESOURCES", NT_STATUS_REMOTE_RESOURCES},
+	{"NT_STATUS_LINK_FAILED", NT_STATUS_LINK_FAILED},
+	{"NT_STATUS_LINK_TIMEOUT", NT_STATUS_LINK_TIMEOUT},
+	{"NT_STATUS_INVALID_CONNECTION", NT_STATUS_INVALID_CONNECTION},
+	{"NT_STATUS_INVALID_ADDRESS", NT_STATUS_INVALID_ADDRESS},
+	{"NT_STATUS_DLL_INIT_FAILED", NT_STATUS_DLL_INIT_FAILED},
+	{"NT_STATUS_MISSING_SYSTEMFILE", NT_STATUS_MISSING_SYSTEMFILE},
+	{"NT_STATUS_UNHANDLED_EXCEPTION", NT_STATUS_UNHANDLED_EXCEPTION},
+	{"NT_STATUS_APP_INIT_FAILURE", NT_STATUS_APP_INIT_FAILURE},
+	{"NT_STATUS_PAGEFILE_CREATE_FAILED",
+	 NT_STATUS_PAGEFILE_CREATE_FAILED},
+	{"NT_STATUS_NO_PAGEFILE", NT_STATUS_NO_PAGEFILE},
+	{"NT_STATUS_INVALID_LEVEL", NT_STATUS_INVALID_LEVEL},
+	{"NT_STATUS_WRONG_PASSWORD_CORE", NT_STATUS_WRONG_PASSWORD_CORE},
+	{"NT_STATUS_ILLEGAL_FLOAT_CONTEXT",
+	 NT_STATUS_ILLEGAL_FLOAT_CONTEXT},
+	{"NT_STATUS_PIPE_BROKEN", NT_STATUS_PIPE_BROKEN},
+	{"NT_STATUS_REGISTRY_CORRUPT", NT_STATUS_REGISTRY_CORRUPT},
+	{"NT_STATUS_REGISTRY_IO_FAILED", NT_STATUS_REGISTRY_IO_FAILED},
+	{"NT_STATUS_NO_EVENT_PAIR", NT_STATUS_NO_EVENT_PAIR},
+	{"NT_STATUS_UNRECOGNIZED_VOLUME", NT_STATUS_UNRECOGNIZED_VOLUME},
+	{"NT_STATUS_SERIAL_NO_DEVICE_INITED",
+	 NT_STATUS_SERIAL_NO_DEVICE_INITED},
+	{"NT_STATUS_NO_SUCH_ALIAS", NT_STATUS_NO_SUCH_ALIAS},
+	{"NT_STATUS_MEMBER_NOT_IN_ALIAS", NT_STATUS_MEMBER_NOT_IN_ALIAS},
+	{"NT_STATUS_MEMBER_IN_ALIAS", NT_STATUS_MEMBER_IN_ALIAS},
+	{"NT_STATUS_ALIAS_EXISTS", NT_STATUS_ALIAS_EXISTS},
+	{"NT_STATUS_LOGON_NOT_GRANTED", NT_STATUS_LOGON_NOT_GRANTED},
+	{"NT_STATUS_TOO_MANY_SECRETS", NT_STATUS_TOO_MANY_SECRETS},
+	{"NT_STATUS_SECRET_TOO_LONG", NT_STATUS_SECRET_TOO_LONG},
+	{"NT_STATUS_INTERNAL_DB_ERROR", NT_STATUS_INTERNAL_DB_ERROR},
+	{"NT_STATUS_FULLSCREEN_MODE", NT_STATUS_FULLSCREEN_MODE},
+	{"NT_STATUS_TOO_MANY_CONTEXT_IDS", NT_STATUS_TOO_MANY_CONTEXT_IDS},
+	{"NT_STATUS_LOGON_TYPE_NOT_GRANTED",
+	 NT_STATUS_LOGON_TYPE_NOT_GRANTED},
+	{"NT_STATUS_NOT_REGISTRY_FILE", NT_STATUS_NOT_REGISTRY_FILE},
+	{"NT_STATUS_NT_CROSS_ENCRYPTION_REQUIRED",
+	 NT_STATUS_NT_CROSS_ENCRYPTION_REQUIRED},
+	{"NT_STATUS_DOMAIN_CTRLR_CONFIG_ERROR",
+	 NT_STATUS_DOMAIN_CTRLR_CONFIG_ERROR},
+	{"NT_STATUS_FT_MISSING_MEMBER", NT_STATUS_FT_MISSING_MEMBER},
+	{"NT_STATUS_ILL_FORMED_SERVICE_ENTRY",
+	 NT_STATUS_ILL_FORMED_SERVICE_ENTRY},
+	{"NT_STATUS_ILLEGAL_CHARACTER", NT_STATUS_ILLEGAL_CHARACTER},
+	{"NT_STATUS_UNMAPPABLE_CHARACTER", NT_STATUS_UNMAPPABLE_CHARACTER},
+	{"NT_STATUS_UNDEFINED_CHARACTER", NT_STATUS_UNDEFINED_CHARACTER},
+	{"NT_STATUS_FLOPPY_VOLUME", NT_STATUS_FLOPPY_VOLUME},
+	{"NT_STATUS_FLOPPY_ID_MARK_NOT_FOUND",
+	 NT_STATUS_FLOPPY_ID_MARK_NOT_FOUND},
+	{"NT_STATUS_FLOPPY_WRONG_CYLINDER",
+	 NT_STATUS_FLOPPY_WRONG_CYLINDER},
+	{"NT_STATUS_FLOPPY_UNKNOWN_ERROR", NT_STATUS_FLOPPY_UNKNOWN_ERROR},
+	{"NT_STATUS_FLOPPY_BAD_REGISTERS", NT_STATUS_FLOPPY_BAD_REGISTERS},
+	{"NT_STATUS_DISK_RECALIBRATE_FAILED",
+	 NT_STATUS_DISK_RECALIBRATE_FAILED},
+	{"NT_STATUS_DISK_OPERATION_FAILED",
+	 NT_STATUS_DISK_OPERATION_FAILED},
+	{"NT_STATUS_DISK_RESET_FAILED", NT_STATUS_DISK_RESET_FAILED},
+	{"NT_STATUS_SHARED_IRQ_BUSY", NT_STATUS_SHARED_IRQ_BUSY},
+	{"NT_STATUS_FT_ORPHANING", NT_STATUS_FT_ORPHANING},
+	{"NT_STATUS_PARTITION_FAILURE", NT_STATUS_PARTITION_FAILURE},
+	{"NT_STATUS_INVALID_BLOCK_LENGTH", NT_STATUS_INVALID_BLOCK_LENGTH},
+	{"NT_STATUS_DEVICE_NOT_PARTITIONED",
+	 NT_STATUS_DEVICE_NOT_PARTITIONED},
+	{"NT_STATUS_UNABLE_TO_LOCK_MEDIA", NT_STATUS_UNABLE_TO_LOCK_MEDIA},
+	{"NT_STATUS_UNABLE_TO_UNLOAD_MEDIA",
+	 NT_STATUS_UNABLE_TO_UNLOAD_MEDIA},
+	{"NT_STATUS_EOM_OVERFLOW", NT_STATUS_EOM_OVERFLOW},
+	{"NT_STATUS_NO_MEDIA", NT_STATUS_NO_MEDIA},
+	{"NT_STATUS_NO_SUCH_MEMBER", NT_STATUS_NO_SUCH_MEMBER},
+	{"NT_STATUS_INVALID_MEMBER", NT_STATUS_INVALID_MEMBER},
+	{"NT_STATUS_KEY_DELETED", NT_STATUS_KEY_DELETED},
+	{"NT_STATUS_NO_LOG_SPACE", NT_STATUS_NO_LOG_SPACE},
+	{"NT_STATUS_TOO_MANY_SIDS", NT_STATUS_TOO_MANY_SIDS},
+	{"NT_STATUS_LM_CROSS_ENCRYPTION_REQUIRED",
+	 NT_STATUS_LM_CROSS_ENCRYPTION_REQUIRED},
+	{"NT_STATUS_KEY_HAS_CHILDREN", NT_STATUS_KEY_HAS_CHILDREN},
+	{"NT_STATUS_CHILD_MUST_BE_VOLATILE",
+	 NT_STATUS_CHILD_MUST_BE_VOLATILE},
+	{"NT_STATUS_DEVICE_CONFIGURATION_ERROR",
+	 NT_STATUS_DEVICE_CONFIGURATION_ERROR},
+	{"NT_STATUS_DRIVER_INTERNAL_ERROR",
+	 NT_STATUS_DRIVER_INTERNAL_ERROR},
+	{"NT_STATUS_INVALID_DEVICE_STATE", NT_STATUS_INVALID_DEVICE_STATE},
+	{"NT_STATUS_IO_DEVICE_ERROR", NT_STATUS_IO_DEVICE_ERROR},
+	{"NT_STATUS_DEVICE_PROTOCOL_ERROR",
+	 NT_STATUS_DEVICE_PROTOCOL_ERROR},
+	{"NT_STATUS_BACKUP_CONTROLLER", NT_STATUS_BACKUP_CONTROLLER},
+	{"NT_STATUS_LOG_FILE_FULL", NT_STATUS_LOG_FILE_FULL},
+	{"NT_STATUS_TOO_LATE", NT_STATUS_TOO_LATE},
+	{"NT_STATUS_NO_TRUST_LSA_SECRET", NT_STATUS_NO_TRUST_LSA_SECRET},
+	{"NT_STATUS_NO_TRUST_SAM_ACCOUNT", NT_STATUS_NO_TRUST_SAM_ACCOUNT},
+	{"NT_STATUS_TRUSTED_DOMAIN_FAILURE",
+	 NT_STATUS_TRUSTED_DOMAIN_FAILURE},
+	{"NT_STATUS_TRUSTED_RELATIONSHIP_FAILURE",
+	 NT_STATUS_TRUSTED_RELATIONSHIP_FAILURE},
+	{"NT_STATUS_EVENTLOG_FILE_CORRUPT",
+	 NT_STATUS_EVENTLOG_FILE_CORRUPT},
+	{"NT_STATUS_EVENTLOG_CANT_START", NT_STATUS_EVENTLOG_CANT_START},
+	{"NT_STATUS_TRUST_FAILURE", NT_STATUS_TRUST_FAILURE},
+	{"NT_STATUS_MUTANT_LIMIT_EXCEEDED",
+	 NT_STATUS_MUTANT_LIMIT_EXCEEDED},
+	{"NT_STATUS_NETLOGON_NOT_STARTED", NT_STATUS_NETLOGON_NOT_STARTED},
+	{"NT_STATUS_ACCOUNT_EXPIRED", NT_STATUS_ACCOUNT_EXPIRED},
+	{"NT_STATUS_POSSIBLE_DEADLOCK", NT_STATUS_POSSIBLE_DEADLOCK},
+	{"NT_STATUS_NETWORK_CREDENTIAL_CONFLICT",
+	 NT_STATUS_NETWORK_CREDENTIAL_CONFLICT},
+	{"NT_STATUS_REMOTE_SESSION_LIMIT", NT_STATUS_REMOTE_SESSION_LIMIT},
+	{"NT_STATUS_EVENTLOG_FILE_CHANGED",
+	 NT_STATUS_EVENTLOG_FILE_CHANGED},
+	{"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
+	 NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT},
+	{"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
+	 NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT},
+	{"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
+	 NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT},
+	{"NT_STATUS_DOMAIN_TRUST_INCONSISTENT",
+	 NT_STATUS_DOMAIN_TRUST_INCONSISTENT},
+	{"NT_STATUS_FS_DRIVER_REQUIRED", NT_STATUS_FS_DRIVER_REQUIRED},
+	{"NT_STATUS_NO_USER_SESSION_KEY", NT_STATUS_NO_USER_SESSION_KEY},
+	{"NT_STATUS_USER_SESSION_DELETED", NT_STATUS_USER_SESSION_DELETED},
+	{"NT_STATUS_RESOURCE_LANG_NOT_FOUND",
+	 NT_STATUS_RESOURCE_LANG_NOT_FOUND},
+	{"NT_STATUS_INSUFF_SERVER_RESOURCES",
+	 NT_STATUS_INSUFF_SERVER_RESOURCES},
+	{"NT_STATUS_INVALID_BUFFER_SIZE", NT_STATUS_INVALID_BUFFER_SIZE},
+	{"NT_STATUS_INVALID_ADDRESS_COMPONENT",
+	 NT_STATUS_INVALID_ADDRESS_COMPONENT},
+	{"NT_STATUS_INVALID_ADDRESS_WILDCARD",
+	 NT_STATUS_INVALID_ADDRESS_WILDCARD},
+	{"NT_STATUS_TOO_MANY_ADDRESSES", NT_STATUS_TOO_MANY_ADDRESSES},
+	{"NT_STATUS_ADDRESS_ALREADY_EXISTS",
+	 NT_STATUS_ADDRESS_ALREADY_EXISTS},
+	{"NT_STATUS_ADDRESS_CLOSED", NT_STATUS_ADDRESS_CLOSED},
+	{"NT_STATUS_CONNECTION_DISCONNECTED",
+	 NT_STATUS_CONNECTION_DISCONNECTED},
+	{"NT_STATUS_CONNECTION_RESET", NT_STATUS_CONNECTION_RESET},
+	{"NT_STATUS_TOO_MANY_NODES", NT_STATUS_TOO_MANY_NODES},
+	{"NT_STATUS_TRANSACTION_ABORTED", NT_STATUS_TRANSACTION_ABORTED},
+	{"NT_STATUS_TRANSACTION_TIMED_OUT",
+	 NT_STATUS_TRANSACTION_TIMED_OUT},
+	{"NT_STATUS_TRANSACTION_NO_RELEASE",
+	 NT_STATUS_TRANSACTION_NO_RELEASE},
+	{"NT_STATUS_TRANSACTION_NO_MATCH", NT_STATUS_TRANSACTION_NO_MATCH},
+	{"NT_STATUS_TRANSACTION_RESPONDED",
+	 NT_STATUS_TRANSACTION_RESPONDED},
+	{"NT_STATUS_TRANSACTION_INVALID_ID",
+	 NT_STATUS_TRANSACTION_INVALID_ID},
+	{"NT_STATUS_TRANSACTION_INVALID_TYPE",
+	 NT_STATUS_TRANSACTION_INVALID_TYPE},
+	{"NT_STATUS_NOT_SERVER_SESSION", NT_STATUS_NOT_SERVER_SESSION},
+	{"NT_STATUS_NOT_CLIENT_SESSION", NT_STATUS_NOT_CLIENT_SESSION},
+	{"NT_STATUS_CANNOT_LOAD_REGISTRY_FILE",
+	 NT_STATUS_CANNOT_LOAD_REGISTRY_FILE},
+	{"NT_STATUS_DEBUG_ATTACH_FAILED", NT_STATUS_DEBUG_ATTACH_FAILED},
+	{"NT_STATUS_SYSTEM_PROCESS_TERMINATED",
+	 NT_STATUS_SYSTEM_PROCESS_TERMINATED},
+	{"NT_STATUS_DATA_NOT_ACCEPTED", NT_STATUS_DATA_NOT_ACCEPTED},
+	{"NT_STATUS_NO_BROWSER_SERVERS_FOUND",
+	 NT_STATUS_NO_BROWSER_SERVERS_FOUND},
+	{"NT_STATUS_VDM_HARD_ERROR", NT_STATUS_VDM_HARD_ERROR},
+	{"NT_STATUS_DRIVER_CANCEL_TIMEOUT",
+	 NT_STATUS_DRIVER_CANCEL_TIMEOUT},
+	{"NT_STATUS_REPLY_MESSAGE_MISMATCH",
+	 NT_STATUS_REPLY_MESSAGE_MISMATCH},
+	{"NT_STATUS_MAPPED_ALIGNMENT", NT_STATUS_MAPPED_ALIGNMENT},
+	{"NT_STATUS_IMAGE_CHECKSUM_MISMATCH",
+	 NT_STATUS_IMAGE_CHECKSUM_MISMATCH},
+	{"NT_STATUS_LOST_WRITEBEHIND_DATA",
+	 NT_STATUS_LOST_WRITEBEHIND_DATA},
+	{"NT_STATUS_CLIENT_SERVER_PARAMETERS_INVALID",
+	 NT_STATUS_CLIENT_SERVER_PARAMETERS_INVALID},
+	{"NT_STATUS_PASSWORD_MUST_CHANGE", NT_STATUS_PASSWORD_MUST_CHANGE},
+	{"NT_STATUS_NOT_FOUND", NT_STATUS_NOT_FOUND},
+	{"NT_STATUS_NOT_TINY_STREAM", NT_STATUS_NOT_TINY_STREAM},
+	{"NT_STATUS_RECOVERY_FAILURE", NT_STATUS_RECOVERY_FAILURE},
+	{"NT_STATUS_STACK_OVERFLOW_READ", NT_STATUS_STACK_OVERFLOW_READ},
+	{"NT_STATUS_FAIL_CHECK", NT_STATUS_FAIL_CHECK},
+	{"NT_STATUS_DUPLICATE_OBJECTID", NT_STATUS_DUPLICATE_OBJECTID},
+	{"NT_STATUS_OBJECTID_EXISTS", NT_STATUS_OBJECTID_EXISTS},
+	{"NT_STATUS_CONVERT_TO_LARGE", NT_STATUS_CONVERT_TO_LARGE},
+	{"NT_STATUS_RETRY", NT_STATUS_RETRY},
+	{"NT_STATUS_FOUND_OUT_OF_SCOPE", NT_STATUS_FOUND_OUT_OF_SCOPE},
+	{"NT_STATUS_ALLOCATE_BUCKET", NT_STATUS_ALLOCATE_BUCKET},
+	{"NT_STATUS_PROPSET_NOT_FOUND", NT_STATUS_PROPSET_NOT_FOUND},
+	{"NT_STATUS_MARSHALL_OVERFLOW", NT_STATUS_MARSHALL_OVERFLOW},
+	{"NT_STATUS_INVALID_VARIANT", NT_STATUS_INVALID_VARIANT},
+	{"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
+	 NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND},
+	{"NT_STATUS_ACCOUNT_LOCKED_OUT", NT_STATUS_ACCOUNT_LOCKED_OUT},
+	{"NT_STATUS_HANDLE_NOT_CLOSABLE", NT_STATUS_HANDLE_NOT_CLOSABLE},
+	{"NT_STATUS_CONNECTION_REFUSED", NT_STATUS_CONNECTION_REFUSED},
+	{"NT_STATUS_GRACEFUL_DISCONNECT", NT_STATUS_GRACEFUL_DISCONNECT},
+	{"NT_STATUS_ADDRESS_ALREADY_ASSOCIATED",
+	 NT_STATUS_ADDRESS_ALREADY_ASSOCIATED},
+	{"NT_STATUS_ADDRESS_NOT_ASSOCIATED",
+	 NT_STATUS_ADDRESS_NOT_ASSOCIATED},
+	{"NT_STATUS_CONNECTION_INVALID", NT_STATUS_CONNECTION_INVALID},
+	{"NT_STATUS_CONNECTION_ACTIVE", NT_STATUS_CONNECTION_ACTIVE},
+	{"NT_STATUS_NETWORK_UNREACHABLE", NT_STATUS_NETWORK_UNREACHABLE},
+	{"NT_STATUS_HOST_UNREACHABLE", NT_STATUS_HOST_UNREACHABLE},
+	{"NT_STATUS_PROTOCOL_UNREACHABLE", NT_STATUS_PROTOCOL_UNREACHABLE},
+	{"NT_STATUS_PORT_UNREACHABLE", NT_STATUS_PORT_UNREACHABLE},
+	{"NT_STATUS_REQUEST_ABORTED", NT_STATUS_REQUEST_ABORTED},
+	{"NT_STATUS_CONNECTION_ABORTED", NT_STATUS_CONNECTION_ABORTED},
+	{"NT_STATUS_BAD_COMPRESSION_BUFFER",
+	 NT_STATUS_BAD_COMPRESSION_BUFFER},
+	{"NT_STATUS_USER_MAPPED_FILE", NT_STATUS_USER_MAPPED_FILE},
+	{"NT_STATUS_AUDIT_FAILED", NT_STATUS_AUDIT_FAILED},
+	{"NT_STATUS_TIMER_RESOLUTION_NOT_SET",
+	 NT_STATUS_TIMER_RESOLUTION_NOT_SET},
+	{"NT_STATUS_CONNECTION_COUNT_LIMIT",
+	 NT_STATUS_CONNECTION_COUNT_LIMIT},
+	{"NT_STATUS_LOGIN_TIME_RESTRICTION",
+	 NT_STATUS_LOGIN_TIME_RESTRICTION},
+	{"NT_STATUS_LOGIN_WKSTA_RESTRICTION",
+	 NT_STATUS_LOGIN_WKSTA_RESTRICTION},
+	{"NT_STATUS_IMAGE_MP_UP_MISMATCH", NT_STATUS_IMAGE_MP_UP_MISMATCH},
+	{"NT_STATUS_INSUFFICIENT_LOGON_INFO",
+	 NT_STATUS_INSUFFICIENT_LOGON_INFO},
+	{"NT_STATUS_BAD_DLL_ENTRYPOINT", NT_STATUS_BAD_DLL_ENTRYPOINT},
+	{"NT_STATUS_BAD_SERVICE_ENTRYPOINT",
+	 NT_STATUS_BAD_SERVICE_ENTRYPOINT},
+	{"NT_STATUS_LPC_REPLY_LOST", NT_STATUS_LPC_REPLY_LOST},
+	{"NT_STATUS_IP_ADDRESS_CONFLICT1", NT_STATUS_IP_ADDRESS_CONFLICT1},
+	{"NT_STATUS_IP_ADDRESS_CONFLICT2", NT_STATUS_IP_ADDRESS_CONFLICT2},
+	{"NT_STATUS_REGISTRY_QUOTA_LIMIT", NT_STATUS_REGISTRY_QUOTA_LIMIT},
+	{"NT_STATUS_PATH_NOT_COVERED", NT_STATUS_PATH_NOT_COVERED},
+	{"NT_STATUS_NO_CALLBACK_ACTIVE", NT_STATUS_NO_CALLBACK_ACTIVE},
+	{"NT_STATUS_LICENSE_QUOTA_EXCEEDED",
+	 NT_STATUS_LICENSE_QUOTA_EXCEEDED},
+	{"NT_STATUS_PWD_TOO_SHORT", NT_STATUS_PWD_TOO_SHORT},
+	{"NT_STATUS_PWD_TOO_RECENT", NT_STATUS_PWD_TOO_RECENT},
+	{"NT_STATUS_PWD_HISTORY_CONFLICT", NT_STATUS_PWD_HISTORY_CONFLICT},
+	{"NT_STATUS_PLUGPLAY_NO_DEVICE", NT_STATUS_PLUGPLAY_NO_DEVICE},
+	{"NT_STATUS_UNSUPPORTED_COMPRESSION",
+	 NT_STATUS_UNSUPPORTED_COMPRESSION},
+	{"NT_STATUS_INVALID_HW_PROFILE", NT_STATUS_INVALID_HW_PROFILE},
+	{"NT_STATUS_INVALID_PLUGPLAY_DEVICE_PATH",
+	 NT_STATUS_INVALID_PLUGPLAY_DEVICE_PATH},
+	{"NT_STATUS_DRIVER_ORDINAL_NOT_FOUND",
+	 NT_STATUS_DRIVER_ORDINAL_NOT_FOUND},
+	{"NT_STATUS_DRIVER_ENTRYPOINT_NOT_FOUND",
+	 NT_STATUS_DRIVER_ENTRYPOINT_NOT_FOUND},
+	{"NT_STATUS_RESOURCE_NOT_OWNED", NT_STATUS_RESOURCE_NOT_OWNED},
+	{"NT_STATUS_TOO_MANY_LINKS", NT_STATUS_TOO_MANY_LINKS},
+	{"NT_STATUS_QUOTA_LIST_INCONSISTENT",
+	 NT_STATUS_QUOTA_LIST_INCONSISTENT},
+	{"NT_STATUS_FILE_IS_OFFLINE", NT_STATUS_FILE_IS_OFFLINE},
+	{"NT_STATUS_NO_MORE_ENTRIES", NT_STATUS_NO_MORE_ENTRIES},
+	{"NT_STATUS_MORE_ENTRIES", NT_STATUS_MORE_ENTRIES},
+	{"NT_STATUS_SOME_UNMAPPED", NT_STATUS_SOME_UNMAPPED},
+	{NULL, 0}
+};
diff --git a/fs/smb/client/nterr.h b/fs/smb/client/nterr.h
new file mode 100644
index 0000000000..edd4741cab
--- /dev/null
+++ b/fs/smb/client/nterr.h
@@ -0,0 +1,551 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+   Unix SMB/Netbios implementation.
+   Version 1.9.
+   NT error code constants
+   Copyright (C) Andrew Tridgell              1992-2000
+   Copyright (C) John H Terpstra              1996-2000
+   Copyright (C) Luke Kenneth Casson Leighton 1996-2000
+   Copyright (C) Paul Ashton                  1998-2000
+
+*/
+
+
+
+#ifndef _NTERR_H
+#define _NTERR_H
+
+struct nt_err_code_struct {
+	char *nt_errstr;
+	__u32 nt_errcode;
+};
+
+extern const struct nt_err_code_struct nt_errs[];
+
+/* Win32 Status codes. */
+#define NT_STATUS_MORE_ENTRIES         0x0105
+#define NT_ERROR_INVALID_PARAMETER     0x0057
+#define NT_ERROR_INSUFFICIENT_BUFFER   0x007a
+#define NT_STATUS_1804                 0x070c
+#define NT_STATUS_NOTIFY_ENUM_DIR      0x010c
+
+/*
+ * Win32 Error codes extracted using a loop in smbclient then printing a netmon
+ * sniff to a file.
+ */
+
+#define NT_STATUS_OK                   0x0000
+#define NT_STATUS_SOME_UNMAPPED        0x0107
+#define NT_STATUS_BUFFER_OVERFLOW  0x80000005
+#define NT_STATUS_NO_MORE_ENTRIES  0x8000001a
+#define NT_STATUS_MEDIA_CHANGED    0x8000001c
+#define NT_STATUS_END_OF_MEDIA     0x8000001e
+#define NT_STATUS_MEDIA_CHECK      0x80000020
+#define NT_STATUS_NO_DATA_DETECTED 0x8000001c
+#define NT_STATUS_STOPPED_ON_SYMLINK 0x8000002d
+#define NT_STATUS_DEVICE_REQUIRES_CLEANING 0x80000288
+#define NT_STATUS_DEVICE_DOOR_OPEN 0x80000288
+#define NT_STATUS_UNSUCCESSFUL 0xC0000000 | 0x0001
+#define NT_STATUS_NOT_IMPLEMENTED 0xC0000000 | 0x0002
+#define NT_STATUS_INVALID_INFO_CLASS 0xC0000000 | 0x0003
+#define NT_STATUS_INFO_LENGTH_MISMATCH 0xC0000000 | 0x0004
+#define NT_STATUS_ACCESS_VIOLATION 0xC0000000 | 0x0005
+#define NT_STATUS_IN_PAGE_ERROR 0xC0000000 | 0x0006
+#define NT_STATUS_PAGEFILE_QUOTA 0xC0000000 | 0x0007
+#define NT_STATUS_INVALID_HANDLE 0xC0000000 | 0x0008
+#define NT_STATUS_BAD_INITIAL_STACK 0xC0000000 | 0x0009
+#define NT_STATUS_BAD_INITIAL_PC 0xC0000000 | 0x000a
+#define NT_STATUS_INVALID_CID 0xC0000000 | 0x000b
+#define NT_STATUS_TIMER_NOT_CANCELED 0xC0000000 | 0x000c
+#define NT_STATUS_INVALID_PARAMETER 0xC0000000 | 0x000d
+#define NT_STATUS_NO_SUCH_DEVICE 0xC0000000 | 0x000e
+#define NT_STATUS_NO_SUCH_FILE 0xC0000000 | 0x000f
+#define NT_STATUS_INVALID_DEVICE_REQUEST 0xC0000000 | 0x0010
+#define NT_STATUS_END_OF_FILE 0xC0000000 | 0x0011
+#define NT_STATUS_WRONG_VOLUME 0xC0000000 | 0x0012
+#define NT_STATUS_NO_MEDIA_IN_DEVICE 0xC0000000 | 0x0013
+#define NT_STATUS_UNRECOGNIZED_MEDIA 0xC0000000 | 0x0014
+#define NT_STATUS_NONEXISTENT_SECTOR 0xC0000000 | 0x0015
+#define NT_STATUS_MORE_PROCESSING_REQUIRED 0xC0000000 | 0x0016
+#define NT_STATUS_NO_MEMORY 0xC0000000 | 0x0017
+#define NT_STATUS_CONFLICTING_ADDRESSES 0xC0000000 | 0x0018
+#define NT_STATUS_NOT_MAPPED_VIEW 0xC0000000 | 0x0019
+#define NT_STATUS_UNABLE_TO_FREE_VM 0x80000000 | 0x001a
+#define NT_STATUS_UNABLE_TO_DELETE_SECTION 0xC0000000 | 0x001b
+#define NT_STATUS_INVALID_SYSTEM_SERVICE 0xC0000000 | 0x001c
+#define NT_STATUS_ILLEGAL_INSTRUCTION 0xC0000000 | 0x001d
+#define NT_STATUS_INVALID_LOCK_SEQUENCE 0xC0000000 | 0x001e
+#define NT_STATUS_INVALID_VIEW_SIZE 0xC0000000 | 0x001f
+#define NT_STATUS_INVALID_FILE_FOR_SECTION 0xC0000000 | 0x0020
+#define NT_STATUS_ALREADY_COMMITTED 0xC0000000 | 0x0021
+#define NT_STATUS_ACCESS_DENIED 0xC0000000 | 0x0022
+#define NT_STATUS_BUFFER_TOO_SMALL 0xC0000000 | 0x0023
+#define NT_STATUS_OBJECT_TYPE_MISMATCH 0xC0000000 | 0x0024
+#define NT_STATUS_NONCONTINUABLE_EXCEPTION 0xC0000000 | 0x0025
+#define NT_STATUS_INVALID_DISPOSITION 0xC0000000 | 0x0026
+#define NT_STATUS_UNWIND 0xC0000000 | 0x0027
+#define NT_STATUS_BAD_STACK 0xC0000000 | 0x0028
+#define NT_STATUS_INVALID_UNWIND_TARGET 0xC0000000 | 0x0029
+#define NT_STATUS_NOT_LOCKED 0xC0000000 | 0x002a
+#define NT_STATUS_PARITY_ERROR 0xC0000000 | 0x002b
+#define NT_STATUS_UNABLE_TO_DECOMMIT_VM 0xC0000000 | 0x002c
+#define NT_STATUS_NOT_COMMITTED 0xC0000000 | 0x002d
+#define NT_STATUS_INVALID_PORT_ATTRIBUTES 0xC0000000 | 0x002e
+#define NT_STATUS_PORT_MESSAGE_TOO_LONG 0xC0000000 | 0x002f
+#define NT_STATUS_INVALID_PARAMETER_MIX 0xC0000000 | 0x0030
+#define NT_STATUS_INVALID_QUOTA_LOWER 0xC0000000 | 0x0031
+#define NT_STATUS_DISK_CORRUPT_ERROR 0xC0000000 | 0x0032
+#define NT_STATUS_OBJECT_NAME_INVALID 0xC0000000 | 0x0033
+#define NT_STATUS_OBJECT_NAME_NOT_FOUND 0xC0000000 | 0x0034
+#define NT_STATUS_OBJECT_NAME_COLLISION 0xC0000000 | 0x0035
+#define NT_STATUS_HANDLE_NOT_WAITABLE 0xC0000000 | 0x0036
+#define NT_STATUS_PORT_DISCONNECTED 0xC0000000 | 0x0037
+#define NT_STATUS_DEVICE_ALREADY_ATTACHED 0xC0000000 | 0x0038
+#define NT_STATUS_OBJECT_PATH_INVALID 0xC0000000 | 0x0039
+#define NT_STATUS_OBJECT_PATH_NOT_FOUND 0xC0000000 | 0x003a
+#define NT_STATUS_OBJECT_PATH_SYNTAX_BAD 0xC0000000 | 0x003b
+#define NT_STATUS_DATA_OVERRUN 0xC0000000 | 0x003c
+#define NT_STATUS_DATA_LATE_ERROR 0xC0000000 | 0x003d
+#define NT_STATUS_DATA_ERROR 0xC0000000 | 0x003e
+#define NT_STATUS_CRC_ERROR 0xC0000000 | 0x003f
+#define NT_STATUS_SECTION_TOO_BIG 0xC0000000 | 0x0040
+#define NT_STATUS_PORT_CONNECTION_REFUSED 0xC0000000 | 0x0041
+#define NT_STATUS_INVALID_PORT_HANDLE 0xC0000000 | 0x0042
+#define NT_STATUS_SHARING_VIOLATION 0xC0000000 | 0x0043
+#define NT_STATUS_QUOTA_EXCEEDED 0xC0000000 | 0x0044
+#define NT_STATUS_INVALID_PAGE_PROTECTION 0xC0000000 | 0x0045
+#define NT_STATUS_MUTANT_NOT_OWNED 0xC0000000 | 0x0046
+#define NT_STATUS_SEMAPHORE_LIMIT_EXCEEDED 0xC0000000 | 0x0047
+#define NT_STATUS_PORT_ALREADY_SET 0xC0000000 | 0x0048
+#define NT_STATUS_SECTION_NOT_IMAGE 0xC0000000 | 0x0049
+#define NT_STATUS_SUSPEND_COUNT_EXCEEDED 0xC0000000 | 0x004a
+#define NT_STATUS_THREAD_IS_TERMINATING 0xC0000000 | 0x004b
+#define NT_STATUS_BAD_WORKING_SET_LIMIT 0xC0000000 | 0x004c
+#define NT_STATUS_INCOMPATIBLE_FILE_MAP 0xC0000000 | 0x004d
+#define NT_STATUS_SECTION_PROTECTION 0xC0000000 | 0x004e
+#define NT_STATUS_EAS_NOT_SUPPORTED 0xC0000000 | 0x004f
+#define NT_STATUS_EA_TOO_LARGE 0xC0000000 | 0x0050
+#define NT_STATUS_NONEXISTENT_EA_ENTRY 0xC0000000 | 0x0051
+#define NT_STATUS_NO_EAS_ON_FILE 0xC0000000 | 0x0052
+#define NT_STATUS_EA_CORRUPT_ERROR 0xC0000000 | 0x0053
+#define NT_STATUS_FILE_LOCK_CONFLICT 0xC0000000 | 0x0054
+#define NT_STATUS_LOCK_NOT_GRANTED 0xC0000000 | 0x0055
+#define NT_STATUS_DELETE_PENDING 0xC0000000 | 0x0056
+#define NT_STATUS_CTL_FILE_NOT_SUPPORTED 0xC0000000 | 0x0057
+#define NT_STATUS_UNKNOWN_REVISION 0xC0000000 | 0x0058
+#define NT_STATUS_REVISION_MISMATCH 0xC0000000 | 0x0059
+#define NT_STATUS_INVALID_OWNER 0xC0000000 | 0x005a
+#define NT_STATUS_INVALID_PRIMARY_GROUP 0xC0000000 | 0x005b
+#define NT_STATUS_NO_IMPERSONATION_TOKEN 0xC0000000 | 0x005c
+#define NT_STATUS_CANT_DISABLE_MANDATORY 0xC0000000 | 0x005d
+#define NT_STATUS_NO_LOGON_SERVERS 0xC0000000 | 0x005e
+#define NT_STATUS_NO_SUCH_LOGON_SESSION 0xC0000000 | 0x005f
+#define NT_STATUS_NO_SUCH_PRIVILEGE 0xC0000000 | 0x0060
+#define NT_STATUS_PRIVILEGE_NOT_HELD 0xC0000000 | 0x0061
+#define NT_STATUS_INVALID_ACCOUNT_NAME 0xC0000000 | 0x0062
+#define NT_STATUS_USER_EXISTS 0xC0000000 | 0x0063
+#define NT_STATUS_NO_SUCH_USER 0xC0000000 | 0x0064
+#define NT_STATUS_GROUP_EXISTS 0xC0000000 | 0x0065
+#define NT_STATUS_NO_SUCH_GROUP 0xC0000000 | 0x0066
+#define NT_STATUS_MEMBER_IN_GROUP 0xC0000000 | 0x0067
+#define NT_STATUS_MEMBER_NOT_IN_GROUP 0xC0000000 | 0x0068
+#define NT_STATUS_LAST_ADMIN 0xC0000000 | 0x0069
+#define NT_STATUS_WRONG_PASSWORD 0xC0000000 | 0x006a
+#define NT_STATUS_ILL_FORMED_PASSWORD 0xC0000000 | 0x006b
+#define NT_STATUS_PASSWORD_RESTRICTION 0xC0000000 | 0x006c
+#define NT_STATUS_LOGON_FAILURE 0xC0000000 | 0x006d
+#define NT_STATUS_ACCOUNT_RESTRICTION 0xC0000000 | 0x006e
+#define NT_STATUS_INVALID_LOGON_HOURS 0xC0000000 | 0x006f
+#define NT_STATUS_INVALID_WORKSTATION 0xC0000000 | 0x0070
+#define NT_STATUS_PASSWORD_EXPIRED 0xC0000000 | 0x0071
+#define NT_STATUS_ACCOUNT_DISABLED 0xC0000000 | 0x0072
+#define NT_STATUS_NONE_MAPPED 0xC0000000 | 0x0073
+#define NT_STATUS_TOO_MANY_LUIDS_REQUESTED 0xC0000000 | 0x0074
+#define NT_STATUS_LUIDS_EXHAUSTED 0xC0000000 | 0x0075
+#define NT_STATUS_INVALID_SUB_AUTHORITY 0xC0000000 | 0x0076
+#define NT_STATUS_INVALID_ACL 0xC0000000 | 0x0077
+#define NT_STATUS_INVALID_SID 0xC0000000 | 0x0078
+#define NT_STATUS_INVALID_SECURITY_DESCR 0xC0000000 | 0x0079
+#define NT_STATUS_PROCEDURE_NOT_FOUND 0xC0000000 | 0x007a
+#define NT_STATUS_INVALID_IMAGE_FORMAT 0xC0000000 | 0x007b
+#define NT_STATUS_NO_TOKEN 0xC0000000 | 0x007c
+#define NT_STATUS_BAD_INHERITANCE_ACL 0xC0000000 | 0x007d
+#define NT_STATUS_RANGE_NOT_LOCKED 0xC0000000 | 0x007e
+#define NT_STATUS_DISK_FULL 0xC0000000 | 0x007f
+#define NT_STATUS_SERVER_DISABLED 0xC0000000 | 0x0080
+#define NT_STATUS_SERVER_NOT_DISABLED 0xC0000000 | 0x0081
+#define NT_STATUS_TOO_MANY_GUIDS_REQUESTED 0xC0000000 | 0x0082
+#define NT_STATUS_GUIDS_EXHAUSTED 0xC0000000 | 0x0083
+#define NT_STATUS_INVALID_ID_AUTHORITY 0xC0000000 | 0x0084
+#define NT_STATUS_AGENTS_EXHAUSTED 0xC0000000 | 0x0085
+#define NT_STATUS_INVALID_VOLUME_LABEL 0xC0000000 | 0x0086
+#define NT_STATUS_SECTION_NOT_EXTENDED 0xC0000000 | 0x0087
+#define NT_STATUS_NOT_MAPPED_DATA 0xC0000000 | 0x0088
+#define NT_STATUS_RESOURCE_DATA_NOT_FOUND 0xC0000000 | 0x0089
+#define NT_STATUS_RESOURCE_TYPE_NOT_FOUND 0xC0000000 | 0x008a
+#define NT_STATUS_RESOURCE_NAME_NOT_FOUND 0xC0000000 | 0x008b
+#define NT_STATUS_ARRAY_BOUNDS_EXCEEDED 0xC0000000 | 0x008c
+#define NT_STATUS_FLOAT_DENORMAL_OPERAND 0xC0000000 | 0x008d
+#define NT_STATUS_FLOAT_DIVIDE_BY_ZERO 0xC0000000 | 0x008e
+#define NT_STATUS_FLOAT_INEXACT_RESULT 0xC0000000 | 0x008f
+#define NT_STATUS_FLOAT_INVALID_OPERATION 0xC0000000 | 0x0090
+#define NT_STATUS_FLOAT_OVERFLOW 0xC0000000 | 0x0091
+#define NT_STATUS_FLOAT_STACK_CHECK 0xC0000000 | 0x0092
+#define NT_STATUS_FLOAT_UNDERFLOW 0xC0000000 | 0x0093
+#define NT_STATUS_INTEGER_DIVIDE_BY_ZERO 0xC0000000 | 0x0094
+#define NT_STATUS_INTEGER_OVERFLOW 0xC0000000 | 0x0095
+#define NT_STATUS_PRIVILEGED_INSTRUCTION 0xC0000000 | 0x0096
+#define NT_STATUS_TOO_MANY_PAGING_FILES 0xC0000000 | 0x0097
+#define NT_STATUS_FILE_INVALID 0xC0000000 | 0x0098
+#define NT_STATUS_ALLOTTED_SPACE_EXCEEDED 0xC0000000 | 0x0099
+#define NT_STATUS_INSUFFICIENT_RESOURCES 0xC0000000 | 0x009a
+#define NT_STATUS_DFS_EXIT_PATH_FOUND 0xC0000000 | 0x009b
+#define NT_STATUS_DEVICE_DATA_ERROR 0xC0000000 | 0x009c
+#define NT_STATUS_DEVICE_NOT_CONNECTED 0xC0000000 | 0x009d
+#define NT_STATUS_DEVICE_POWER_FAILURE 0xC0000000 | 0x009e
+#define NT_STATUS_FREE_VM_NOT_AT_BASE 0xC0000000 | 0x009f
+#define NT_STATUS_MEMORY_NOT_ALLOCATED 0xC0000000 | 0x00a0
+#define NT_STATUS_WORKING_SET_QUOTA 0xC0000000 | 0x00a1
+#define NT_STATUS_MEDIA_WRITE_PROTECTED 0xC0000000 | 0x00a2
+#define NT_STATUS_DEVICE_NOT_READY 0xC0000000 | 0x00a3
+#define NT_STATUS_INVALID_GROUP_ATTRIBUTES 0xC0000000 | 0x00a4
+#define NT_STATUS_BAD_IMPERSONATION_LEVEL 0xC0000000 | 0x00a5
+#define NT_STATUS_CANT_OPEN_ANONYMOUS 0xC0000000 | 0x00a6
+#define NT_STATUS_BAD_VALIDATION_CLASS 0xC0000000 | 0x00a7
+#define NT_STATUS_BAD_TOKEN_TYPE 0xC0000000 | 0x00a8
+#define NT_STATUS_BAD_MASTER_BOOT_RECORD 0xC0000000 | 0x00a9
+#define NT_STATUS_INSTRUCTION_MISALIGNMENT 0xC0000000 | 0x00aa
+#define NT_STATUS_INSTANCE_NOT_AVAILABLE 0xC0000000 | 0x00ab
+#define NT_STATUS_PIPE_NOT_AVAILABLE 0xC0000000 | 0x00ac
+#define NT_STATUS_INVALID_PIPE_STATE 0xC0000000 | 0x00ad
+#define NT_STATUS_PIPE_BUSY 0xC0000000 | 0x00ae
+#define NT_STATUS_ILLEGAL_FUNCTION 0xC0000000 | 0x00af
+#define NT_STATUS_PIPE_DISCONNECTED 0xC0000000 | 0x00b0
+#define NT_STATUS_PIPE_CLOSING 0xC0000000 | 0x00b1
+#define NT_STATUS_PIPE_CONNECTED 0xC0000000 | 0x00b2
+#define NT_STATUS_PIPE_LISTENING 0xC0000000 | 0x00b3
+#define NT_STATUS_INVALID_READ_MODE 0xC0000000 | 0x00b4
+#define NT_STATUS_IO_TIMEOUT 0xC0000000 | 0x00b5
+#define NT_STATUS_FILE_FORCED_CLOSED 0xC0000000 | 0x00b6
+#define NT_STATUS_PROFILING_NOT_STARTED 0xC0000000 | 0x00b7
+#define NT_STATUS_PROFILING_NOT_STOPPED 0xC0000000 | 0x00b8
+#define NT_STATUS_COULD_NOT_INTERPRET 0xC0000000 | 0x00b9
+#define NT_STATUS_FILE_IS_A_DIRECTORY 0xC0000000 | 0x00ba
+#define NT_STATUS_NOT_SUPPORTED 0xC0000000 | 0x00bb
+#define NT_STATUS_REMOTE_NOT_LISTENING 0xC0000000 | 0x00bc
+#define NT_STATUS_DUPLICATE_NAME 0xC0000000 | 0x00bd
+#define NT_STATUS_BAD_NETWORK_PATH 0xC0000000 | 0x00be
+#define NT_STATUS_NETWORK_BUSY 0xC0000000 | 0x00bf
+#define NT_STATUS_DEVICE_DOES_NOT_EXIST 0xC0000000 | 0x00c0
+#define NT_STATUS_TOO_MANY_COMMANDS 0xC0000000 | 0x00c1
+#define NT_STATUS_ADAPTER_HARDWARE_ERROR 0xC0000000 | 0x00c2
+#define NT_STATUS_INVALID_NETWORK_RESPONSE 0xC0000000 | 0x00c3
+#define NT_STATUS_UNEXPECTED_NETWORK_ERROR 0xC0000000 | 0x00c4
+#define NT_STATUS_BAD_REMOTE_ADAPTER 0xC0000000 | 0x00c5
+#define NT_STATUS_PRINT_QUEUE_FULL 0xC0000000 | 0x00c6
+#define NT_STATUS_NO_SPOOL_SPACE 0xC0000000 | 0x00c7
+#define NT_STATUS_PRINT_CANCELLED 0xC0000000 | 0x00c8
+#define NT_STATUS_NETWORK_NAME_DELETED 0xC0000000 | 0x00c9
+#define NT_STATUS_NETWORK_ACCESS_DENIED 0xC0000000 | 0x00ca
+#define NT_STATUS_BAD_DEVICE_TYPE 0xC0000000 | 0x00cb
+#define NT_STATUS_BAD_NETWORK_NAME 0xC0000000 | 0x00cc
+#define NT_STATUS_TOO_MANY_NAMES 0xC0000000 | 0x00cd
+#define NT_STATUS_TOO_MANY_SESSIONS 0xC0000000 | 0x00ce
+#define NT_STATUS_SHARING_PAUSED 0xC0000000 | 0x00cf
+#define NT_STATUS_REQUEST_NOT_ACCEPTED 0xC0000000 | 0x00d0
+#define NT_STATUS_REDIRECTOR_PAUSED 0xC0000000 | 0x00d1
+#define NT_STATUS_NET_WRITE_FAULT 0xC0000000 | 0x00d2
+#define NT_STATUS_PROFILING_AT_LIMIT 0xC0000000 | 0x00d3
+#define NT_STATUS_NOT_SAME_DEVICE 0xC0000000 | 0x00d4
+#define NT_STATUS_FILE_RENAMED 0xC0000000 | 0x00d5
+#define NT_STATUS_VIRTUAL_CIRCUIT_CLOSED 0xC0000000 | 0x00d6
+#define NT_STATUS_NO_SECURITY_ON_OBJECT 0xC0000000 | 0x00d7
+#define NT_STATUS_CANT_WAIT 0xC0000000 | 0x00d8
+#define NT_STATUS_PIPE_EMPTY 0xC0000000 | 0x00d9
+#define NT_STATUS_CANT_ACCESS_DOMAIN_INFO 0xC0000000 | 0x00da
+#define NT_STATUS_CANT_TERMINATE_SELF 0xC0000000 | 0x00db
+#define NT_STATUS_INVALID_SERVER_STATE 0xC0000000 | 0x00dc
+#define NT_STATUS_INVALID_DOMAIN_STATE 0xC0000000 | 0x00dd
+#define NT_STATUS_INVALID_DOMAIN_ROLE 0xC0000000 | 0x00de
+#define NT_STATUS_NO_SUCH_DOMAIN 0xC0000000 | 0x00df
+#define NT_STATUS_DOMAIN_EXISTS 0xC0000000 | 0x00e0
+#define NT_STATUS_DOMAIN_LIMIT_EXCEEDED 0xC0000000 | 0x00e1
+#define NT_STATUS_OPLOCK_NOT_GRANTED 0xC0000000 | 0x00e2
+#define NT_STATUS_INVALID_OPLOCK_PROTOCOL 0xC0000000 | 0x00e3
+#define NT_STATUS_INTERNAL_DB_CORRUPTION 0xC0000000 | 0x00e4
+#define NT_STATUS_INTERNAL_ERROR 0xC0000000 | 0x00e5
+#define NT_STATUS_GENERIC_NOT_MAPPED 0xC0000000 | 0x00e6
+#define NT_STATUS_BAD_DESCRIPTOR_FORMAT 0xC0000000 | 0x00e7
+#define NT_STATUS_INVALID_USER_BUFFER 0xC0000000 | 0x00e8
+#define NT_STATUS_UNEXPECTED_IO_ERROR 0xC0000000 | 0x00e9
+#define NT_STATUS_UNEXPECTED_MM_CREATE_ERR 0xC0000000 | 0x00ea
+#define NT_STATUS_UNEXPECTED_MM_MAP_ERROR 0xC0000000 | 0x00eb
+#define NT_STATUS_UNEXPECTED_MM_EXTEND_ERR 0xC0000000 | 0x00ec
+#define NT_STATUS_NOT_LOGON_PROCESS 0xC0000000 | 0x00ed
+#define NT_STATUS_LOGON_SESSION_EXISTS 0xC0000000 | 0x00ee
+#define NT_STATUS_INVALID_PARAMETER_1 0xC0000000 | 0x00ef
+#define NT_STATUS_INVALID_PARAMETER_2 0xC0000000 | 0x00f0
+#define NT_STATUS_INVALID_PARAMETER_3 0xC0000000 | 0x00f1
+#define NT_STATUS_INVALID_PARAMETER_4 0xC0000000 | 0x00f2
+#define NT_STATUS_INVALID_PARAMETER_5 0xC0000000 | 0x00f3
+#define NT_STATUS_INVALID_PARAMETER_6 0xC0000000 | 0x00f4
+#define NT_STATUS_INVALID_PARAMETER_7 0xC0000000 | 0x00f5
+#define NT_STATUS_INVALID_PARAMETER_8 0xC0000000 | 0x00f6
+#define NT_STATUS_INVALID_PARAMETER_9 0xC0000000 | 0x00f7
+#define NT_STATUS_INVALID_PARAMETER_10 0xC0000000 | 0x00f8
+#define NT_STATUS_INVALID_PARAMETER_11 0xC0000000 | 0x00f9
+#define NT_STATUS_INVALID_PARAMETER_12 0xC0000000 | 0x00fa
+#define NT_STATUS_REDIRECTOR_NOT_STARTED 0xC0000000 | 0x00fb
+#define NT_STATUS_REDIRECTOR_STARTED 0xC0000000 | 0x00fc
+#define NT_STATUS_STACK_OVERFLOW 0xC0000000 | 0x00fd
+#define NT_STATUS_NO_SUCH_PACKAGE 0xC0000000 | 0x00fe
+#define NT_STATUS_BAD_FUNCTION_TABLE 0xC0000000 | 0x00ff
+#define NT_STATUS_DIRECTORY_NOT_EMPTY 0xC0000000 | 0x0101
+#define NT_STATUS_FILE_CORRUPT_ERROR 0xC0000000 | 0x0102
+#define NT_STATUS_NOT_A_DIRECTORY 0xC0000000 | 0x0103
+#define NT_STATUS_BAD_LOGON_SESSION_STATE 0xC0000000 | 0x0104
+#define NT_STATUS_LOGON_SESSION_COLLISION 0xC0000000 | 0x0105
+#define NT_STATUS_NAME_TOO_LONG 0xC0000000 | 0x0106
+#define NT_STATUS_FILES_OPEN 0xC0000000 | 0x0107
+#define NT_STATUS_CONNECTION_IN_USE 0xC0000000 | 0x0108
+#define NT_STATUS_MESSAGE_NOT_FOUND 0xC0000000 | 0x0109
+#define NT_STATUS_PROCESS_IS_TERMINATING 0xC0000000 | 0x010a
+#define NT_STATUS_INVALID_LOGON_TYPE 0xC0000000 | 0x010b
+#define NT_STATUS_NO_GUID_TRANSLATION 0xC0000000 | 0x010c
+#define NT_STATUS_CANNOT_IMPERSONATE 0xC0000000 | 0x010d
+#define NT_STATUS_IMAGE_ALREADY_LOADED 0xC0000000 | 0x010e
+#define NT_STATUS_ABIOS_NOT_PRESENT 0xC0000000 | 0x010f
+#define NT_STATUS_ABIOS_LID_NOT_EXIST 0xC0000000 | 0x0110
+#define NT_STATUS_ABIOS_LID_ALREADY_OWNED 0xC0000000 | 0x0111
+#define NT_STATUS_ABIOS_NOT_LID_OWNER 0xC0000000 | 0x0112
+#define NT_STATUS_ABIOS_INVALID_COMMAND 0xC0000000 | 0x0113
+#define NT_STATUS_ABIOS_INVALID_LID 0xC0000000 | 0x0114
+#define NT_STATUS_ABIOS_SELECTOR_NOT_AVAILABLE 0xC0000000 | 0x0115
+#define NT_STATUS_ABIOS_INVALID_SELECTOR 0xC0000000 | 0x0116
+#define NT_STATUS_NO_LDT 0xC0000000 | 0x0117
+#define NT_STATUS_INVALID_LDT_SIZE 0xC0000000 | 0x0118
+#define NT_STATUS_INVALID_LDT_OFFSET 0xC0000000 | 0x0119
+#define NT_STATUS_INVALID_LDT_DESCRIPTOR 0xC0000000 | 0x011a
+#define NT_STATUS_INVALID_IMAGE_NE_FORMAT 0xC0000000 | 0x011b
+#define NT_STATUS_RXACT_INVALID_STATE 0xC0000000 | 0x011c
+#define NT_STATUS_RXACT_COMMIT_FAILURE 0xC0000000 | 0x011d
+#define NT_STATUS_MAPPED_FILE_SIZE_ZERO 0xC0000000 | 0x011e
+#define NT_STATUS_TOO_MANY_OPENED_FILES 0xC0000000 | 0x011f
+#define NT_STATUS_CANCELLED 0xC0000000 | 0x0120
+#define NT_STATUS_CANNOT_DELETE 0xC0000000 | 0x0121
+#define NT_STATUS_INVALID_COMPUTER_NAME 0xC0000000 | 0x0122
+#define NT_STATUS_FILE_DELETED 0xC0000000 | 0x0123
+#define NT_STATUS_SPECIAL_ACCOUNT 0xC0000000 | 0x0124
+#define NT_STATUS_SPECIAL_GROUP 0xC0000000 | 0x0125
+#define NT_STATUS_SPECIAL_USER 0xC0000000 | 0x0126
+#define NT_STATUS_MEMBERS_PRIMARY_GROUP 0xC0000000 | 0x0127
+#define NT_STATUS_FILE_CLOSED 0xC0000000 | 0x0128
+#define NT_STATUS_TOO_MANY_THREADS 0xC0000000 | 0x0129
+#define NT_STATUS_THREAD_NOT_IN_PROCESS 0xC0000000 | 0x012a
+#define NT_STATUS_TOKEN_ALREADY_IN_USE 0xC0000000 | 0x012b
+#define NT_STATUS_PAGEFILE_QUOTA_EXCEEDED 0xC0000000 | 0x012c
+#define NT_STATUS_COMMITMENT_LIMIT 0xC0000000 | 0x012d
+#define NT_STATUS_INVALID_IMAGE_LE_FORMAT 0xC0000000 | 0x012e
+#define NT_STATUS_INVALID_IMAGE_NOT_MZ 0xC0000000 | 0x012f
+#define NT_STATUS_INVALID_IMAGE_PROTECT 0xC0000000 | 0x0130
+#define NT_STATUS_INVALID_IMAGE_WIN_16 0xC0000000 | 0x0131
+#define NT_STATUS_LOGON_SERVER_CONFLICT 0xC0000000 | 0x0132
+#define NT_STATUS_TIME_DIFFERENCE_AT_DC 0xC0000000 | 0x0133
+#define NT_STATUS_SYNCHRONIZATION_REQUIRED 0xC0000000 | 0x0134
+#define NT_STATUS_DLL_NOT_FOUND 0xC0000000 | 0x0135
+#define NT_STATUS_OPEN_FAILED 0xC0000000 | 0x0136
+#define NT_STATUS_IO_PRIVILEGE_FAILED 0xC0000000 | 0x0137
+#define NT_STATUS_ORDINAL_NOT_FOUND 0xC0000000 | 0x0138
+#define NT_STATUS_ENTRYPOINT_NOT_FOUND 0xC0000000 | 0x0139
+#define NT_STATUS_CONTROL_C_EXIT 0xC0000000 | 0x013a
+#define NT_STATUS_LOCAL_DISCONNECT 0xC0000000 | 0x013b
+#define NT_STATUS_REMOTE_DISCONNECT 0xC0000000 | 0x013c
+#define NT_STATUS_REMOTE_RESOURCES 0xC0000000 | 0x013d
+#define NT_STATUS_LINK_FAILED 0xC0000000 | 0x013e
+#define NT_STATUS_LINK_TIMEOUT 0xC0000000 | 0x013f
+#define NT_STATUS_INVALID_CONNECTION 0xC0000000 | 0x0140
+#define NT_STATUS_INVALID_ADDRESS 0xC0000000 | 0x0141
+#define NT_STATUS_DLL_INIT_FAILED 0xC0000000 | 0x0142
+#define NT_STATUS_MISSING_SYSTEMFILE 0xC0000000 | 0x0143
+#define NT_STATUS_UNHANDLED_EXCEPTION 0xC0000000 | 0x0144
+#define NT_STATUS_APP_INIT_FAILURE 0xC0000000 | 0x0145
+#define NT_STATUS_PAGEFILE_CREATE_FAILED 0xC0000000 | 0x0146
+#define NT_STATUS_NO_PAGEFILE 0xC0000000 | 0x0147
+#define NT_STATUS_INVALID_LEVEL 0xC0000000 | 0x0148
+#define NT_STATUS_WRONG_PASSWORD_CORE 0xC0000000 | 0x0149
+#define NT_STATUS_ILLEGAL_FLOAT_CONTEXT 0xC0000000 | 0x014a
+#define NT_STATUS_PIPE_BROKEN 0xC0000000 | 0x014b
+#define NT_STATUS_REGISTRY_CORRUPT 0xC0000000 | 0x014c
+#define NT_STATUS_REGISTRY_IO_FAILED 0xC0000000 | 0x014d
+#define NT_STATUS_NO_EVENT_PAIR 0xC0000000 | 0x014e
+#define NT_STATUS_UNRECOGNIZED_VOLUME 0xC0000000 | 0x014f
+#define NT_STATUS_SERIAL_NO_DEVICE_INITED 0xC0000000 | 0x0150
+#define NT_STATUS_NO_SUCH_ALIAS 0xC0000000 | 0x0151
+#define NT_STATUS_MEMBER_NOT_IN_ALIAS 0xC0000000 | 0x0152
+#define NT_STATUS_MEMBER_IN_ALIAS 0xC0000000 | 0x0153
+#define NT_STATUS_ALIAS_EXISTS 0xC0000000 | 0x0154
+#define NT_STATUS_LOGON_NOT_GRANTED 0xC0000000 | 0x0155
+#define NT_STATUS_TOO_MANY_SECRETS 0xC0000000 | 0x0156
+#define NT_STATUS_SECRET_TOO_LONG 0xC0000000 | 0x0157
+#define NT_STATUS_INTERNAL_DB_ERROR 0xC0000000 | 0x0158
+#define NT_STATUS_FULLSCREEN_MODE 0xC0000000 | 0x0159
+#define NT_STATUS_TOO_MANY_CONTEXT_IDS 0xC0000000 | 0x015a
+#define NT_STATUS_LOGON_TYPE_NOT_GRANTED 0xC0000000 | 0x015b
+#define NT_STATUS_NOT_REGISTRY_FILE 0xC0000000 | 0x015c
+#define NT_STATUS_NT_CROSS_ENCRYPTION_REQUIRED 0xC0000000 | 0x015d
+#define NT_STATUS_DOMAIN_CTRLR_CONFIG_ERROR 0xC0000000 | 0x015e
+#define NT_STATUS_FT_MISSING_MEMBER 0xC0000000 | 0x015f
+#define NT_STATUS_ILL_FORMED_SERVICE_ENTRY 0xC0000000 | 0x0160
+#define NT_STATUS_ILLEGAL_CHARACTER 0xC0000000 | 0x0161
+#define NT_STATUS_UNMAPPABLE_CHARACTER 0xC0000000 | 0x0162
+#define NT_STATUS_UNDEFINED_CHARACTER 0xC0000000 | 0x0163
+#define NT_STATUS_FLOPPY_VOLUME 0xC0000000 | 0x0164
+#define NT_STATUS_FLOPPY_ID_MARK_NOT_FOUND 0xC0000000 | 0x0165
+#define NT_STATUS_FLOPPY_WRONG_CYLINDER 0xC0000000 | 0x0166
+#define NT_STATUS_FLOPPY_UNKNOWN_ERROR 0xC0000000 | 0x0167
+#define NT_STATUS_FLOPPY_BAD_REGISTERS 0xC0000000 | 0x0168
+#define NT_STATUS_DISK_RECALIBRATE_FAILED 0xC0000000 | 0x0169
+#define NT_STATUS_DISK_OPERATION_FAILED 0xC0000000 | 0x016a
+#define NT_STATUS_DISK_RESET_FAILED 0xC0000000 | 0x016b
+#define NT_STATUS_SHARED_IRQ_BUSY 0xC0000000 | 0x016c
+#define NT_STATUS_FT_ORPHANING 0xC0000000 | 0x016d
+#define NT_STATUS_PARTITION_FAILURE 0xC0000000 | 0x0172
+#define NT_STATUS_INVALID_BLOCK_LENGTH 0xC0000000 | 0x0173
+#define NT_STATUS_DEVICE_NOT_PARTITIONED 0xC0000000 | 0x0174
+#define NT_STATUS_UNABLE_TO_LOCK_MEDIA 0xC0000000 | 0x0175
+#define NT_STATUS_UNABLE_TO_UNLOAD_MEDIA 0xC0000000 | 0x0176
+#define NT_STATUS_EOM_OVERFLOW 0xC0000000 | 0x0177
+#define NT_STATUS_NO_MEDIA 0xC0000000 | 0x0178
+#define NT_STATUS_NO_SUCH_MEMBER 0xC0000000 | 0x017a
+#define NT_STATUS_INVALID_MEMBER 0xC0000000 | 0x017b
+#define NT_STATUS_KEY_DELETED 0xC0000000 | 0x017c
+#define NT_STATUS_NO_LOG_SPACE 0xC0000000 | 0x017d
+#define NT_STATUS_TOO_MANY_SIDS 0xC0000000 | 0x017e
+#define NT_STATUS_LM_CROSS_ENCRYPTION_REQUIRED 0xC0000000 | 0x017f
+#define NT_STATUS_KEY_HAS_CHILDREN 0xC0000000 | 0x0180
+#define NT_STATUS_CHILD_MUST_BE_VOLATILE 0xC0000000 | 0x0181
+#define NT_STATUS_DEVICE_CONFIGURATION_ERROR 0xC0000000 | 0x0182
+#define NT_STATUS_DRIVER_INTERNAL_ERROR 0xC0000000 | 0x0183
+#define NT_STATUS_INVALID_DEVICE_STATE 0xC0000000 | 0x0184
+#define NT_STATUS_IO_DEVICE_ERROR 0xC0000000 | 0x0185
+#define NT_STATUS_DEVICE_PROTOCOL_ERROR 0xC0000000 | 0x0186
+#define NT_STATUS_BACKUP_CONTROLLER 0xC0000000 | 0x0187
+#define NT_STATUS_LOG_FILE_FULL 0xC0000000 | 0x0188
+#define NT_STATUS_TOO_LATE 0xC0000000 | 0x0189
+#define NT_STATUS_NO_TRUST_LSA_SECRET 0xC0000000 | 0x018a
+#define NT_STATUS_NO_TRUST_SAM_ACCOUNT 0xC0000000 | 0x018b
+#define NT_STATUS_TRUSTED_DOMAIN_FAILURE 0xC0000000 | 0x018c
+#define NT_STATUS_TRUSTED_RELATIONSHIP_FAILURE 0xC0000000 | 0x018d
+#define NT_STATUS_EVENTLOG_FILE_CORRUPT 0xC0000000 | 0x018e
+#define NT_STATUS_EVENTLOG_CANT_START 0xC0000000 | 0x018f
+#define NT_STATUS_TRUST_FAILURE 0xC0000000 | 0x0190
+#define NT_STATUS_MUTANT_LIMIT_EXCEEDED 0xC0000000 | 0x0191
+#define NT_STATUS_NETLOGON_NOT_STARTED 0xC0000000 | 0x0192
+#define NT_STATUS_ACCOUNT_EXPIRED 0xC0000000 | 0x0193
+#define NT_STATUS_POSSIBLE_DEADLOCK 0xC0000000 | 0x0194
+#define NT_STATUS_NETWORK_CREDENTIAL_CONFLICT 0xC0000000 | 0x0195
+#define NT_STATUS_REMOTE_SESSION_LIMIT 0xC0000000 | 0x0196
+#define NT_STATUS_EVENTLOG_FILE_CHANGED 0xC0000000 | 0x0197
+#define NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT 0xC0000000 | 0x0198
+#define NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT 0xC0000000 | 0x0199
+#define NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT 0xC0000000 | 0x019a
+#define NT_STATUS_DOMAIN_TRUST_INCONSISTENT 0xC0000000 | 0x019b
+#define NT_STATUS_FS_DRIVER_REQUIRED 0xC0000000 | 0x019c
+#define NT_STATUS_NO_USER_SESSION_KEY 0xC0000000 | 0x0202
+#define NT_STATUS_USER_SESSION_DELETED 0xC0000000 | 0x0203
+#define NT_STATUS_RESOURCE_LANG_NOT_FOUND 0xC0000000 | 0x0204
+#define NT_STATUS_INSUFF_SERVER_RESOURCES 0xC0000000 | 0x0205
+#define NT_STATUS_INVALID_BUFFER_SIZE 0xC0000000 | 0x0206
+#define NT_STATUS_INVALID_ADDRESS_COMPONENT 0xC0000000 | 0x0207
+#define NT_STATUS_INVALID_ADDRESS_WILDCARD 0xC0000000 | 0x0208
+#define NT_STATUS_TOO_MANY_ADDRESSES 0xC0000000 | 0x0209
+#define NT_STATUS_ADDRESS_ALREADY_EXISTS 0xC0000000 | 0x020a
+#define NT_STATUS_ADDRESS_CLOSED 0xC0000000 | 0x020b
+#define NT_STATUS_CONNECTION_DISCONNECTED 0xC0000000 | 0x020c
+#define NT_STATUS_CONNECTION_RESET 0xC0000000 | 0x020d
+#define NT_STATUS_TOO_MANY_NODES 0xC0000000 | 0x020e
+#define NT_STATUS_TRANSACTION_ABORTED 0xC0000000 | 0x020f
+#define NT_STATUS_TRANSACTION_TIMED_OUT 0xC0000000 | 0x0210
+#define NT_STATUS_TRANSACTION_NO_RELEASE 0xC0000000 | 0x0211
+#define NT_STATUS_TRANSACTION_NO_MATCH 0xC0000000 | 0x0212
+#define NT_STATUS_TRANSACTION_RESPONDED 0xC0000000 | 0x0213
+#define NT_STATUS_TRANSACTION_INVALID_ID 0xC0000000 | 0x0214
+#define NT_STATUS_TRANSACTION_INVALID_TYPE 0xC0000000 | 0x0215
+#define NT_STATUS_NOT_SERVER_SESSION 0xC0000000 | 0x0216
+#define NT_STATUS_NOT_CLIENT_SESSION 0xC0000000 | 0x0217
+#define NT_STATUS_CANNOT_LOAD_REGISTRY_FILE 0xC0000000 | 0x0218
+#define NT_STATUS_DEBUG_ATTACH_FAILED 0xC0000000 | 0x0219
+#define NT_STATUS_SYSTEM_PROCESS_TERMINATED 0xC0000000 | 0x021a
+#define NT_STATUS_DATA_NOT_ACCEPTED 0xC0000000 | 0x021b
+#define NT_STATUS_NO_BROWSER_SERVERS_FOUND 0xC0000000 | 0x021c
+#define NT_STATUS_VDM_HARD_ERROR 0xC0000000 | 0x021d
+#define NT_STATUS_DRIVER_CANCEL_TIMEOUT 0xC0000000 | 0x021e
+#define NT_STATUS_REPLY_MESSAGE_MISMATCH 0xC0000000 | 0x021f
+#define NT_STATUS_MAPPED_ALIGNMENT 0xC0000000 | 0x0220
+#define NT_STATUS_IMAGE_CHECKSUM_MISMATCH 0xC0000000 | 0x0221
+#define NT_STATUS_LOST_WRITEBEHIND_DATA 0xC0000000 | 0x0222
+#define NT_STATUS_CLIENT_SERVER_PARAMETERS_INVALID 0xC0000000 | 0x0223
+#define NT_STATUS_PASSWORD_MUST_CHANGE 0xC0000000 | 0x0224
+#define NT_STATUS_NOT_FOUND 0xC0000000 | 0x0225
+#define NT_STATUS_NOT_TINY_STREAM 0xC0000000 | 0x0226
+#define NT_STATUS_RECOVERY_FAILURE 0xC0000000 | 0x0227
+#define NT_STATUS_STACK_OVERFLOW_READ 0xC0000000 | 0x0228
+#define NT_STATUS_FAIL_CHECK 0xC0000000 | 0x0229
+#define NT_STATUS_DUPLICATE_OBJECTID 0xC0000000 | 0x022a
+#define NT_STATUS_OBJECTID_EXISTS 0xC0000000 | 0x022b
+#define NT_STATUS_CONVERT_TO_LARGE 0xC0000000 | 0x022c
+#define NT_STATUS_RETRY 0xC0000000 | 0x022d
+#define NT_STATUS_FOUND_OUT_OF_SCOPE 0xC0000000 | 0x022e
+#define NT_STATUS_ALLOCATE_BUCKET 0xC0000000 | 0x022f
+#define NT_STATUS_PROPSET_NOT_FOUND 0xC0000000 | 0x0230
+#define NT_STATUS_MARSHALL_OVERFLOW 0xC0000000 | 0x0231
+#define NT_STATUS_INVALID_VARIANT 0xC0000000 | 0x0232
+#define NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND 0xC0000000 | 0x0233
+#define NT_STATUS_ACCOUNT_LOCKED_OUT 0xC0000000 | 0x0234
+#define NT_STATUS_HANDLE_NOT_CLOSABLE 0xC0000000 | 0x0235
+#define NT_STATUS_CONNECTION_REFUSED 0xC0000000 | 0x0236
+#define NT_STATUS_GRACEFUL_DISCONNECT 0xC0000000 | 0x0237
+#define NT_STATUS_ADDRESS_ALREADY_ASSOCIATED 0xC0000000 | 0x0238
+#define NT_STATUS_ADDRESS_NOT_ASSOCIATED 0xC0000000 | 0x0239
+#define NT_STATUS_CONNECTION_INVALID 0xC0000000 | 0x023a
+#define NT_STATUS_CONNECTION_ACTIVE 0xC0000000 | 0x023b
+#define NT_STATUS_NETWORK_UNREACHABLE 0xC0000000 | 0x023c
+#define NT_STATUS_HOST_UNREACHABLE 0xC0000000 | 0x023d
+#define NT_STATUS_PROTOCOL_UNREACHABLE 0xC0000000 | 0x023e
+#define NT_STATUS_PORT_UNREACHABLE 0xC0000000 | 0x023f
+#define NT_STATUS_REQUEST_ABORTED 0xC0000000 | 0x0240
+#define NT_STATUS_CONNECTION_ABORTED 0xC0000000 | 0x0241
+#define NT_STATUS_BAD_COMPRESSION_BUFFER 0xC0000000 | 0x0242
+#define NT_STATUS_USER_MAPPED_FILE 0xC0000000 | 0x0243
+#define NT_STATUS_AUDIT_FAILED 0xC0000000 | 0x0244
+#define NT_STATUS_TIMER_RESOLUTION_NOT_SET 0xC0000000 | 0x0245
+#define NT_STATUS_CONNECTION_COUNT_LIMIT 0xC0000000 | 0x0246
+#define NT_STATUS_LOGIN_TIME_RESTRICTION 0xC0000000 | 0x0247
+#define NT_STATUS_LOGIN_WKSTA_RESTRICTION 0xC0000000 | 0x0248
+#define NT_STATUS_IMAGE_MP_UP_MISMATCH 0xC0000000 | 0x0249
+#define NT_STATUS_INSUFFICIENT_LOGON_INFO 0xC0000000 | 0x0250
+#define NT_STATUS_BAD_DLL_ENTRYPOINT 0xC0000000 | 0x0251
+#define NT_STATUS_BAD_SERVICE_ENTRYPOINT 0xC0000000 | 0x0252
+#define NT_STATUS_LPC_REPLY_LOST 0xC0000000 | 0x0253
+#define NT_STATUS_IP_ADDRESS_CONFLICT1 0xC0000000 | 0x0254
+#define NT_STATUS_IP_ADDRESS_CONFLICT2 0xC0000000 | 0x0255
+#define NT_STATUS_REGISTRY_QUOTA_LIMIT 0xC0000000 | 0x0256
+#define NT_STATUS_PATH_NOT_COVERED 0xC0000000 | 0x0257
+#define NT_STATUS_NO_CALLBACK_ACTIVE 0xC0000000 | 0x0258
+#define NT_STATUS_LICENSE_QUOTA_EXCEEDED 0xC0000000 | 0x0259
+#define NT_STATUS_PWD_TOO_SHORT 0xC0000000 | 0x025a
+#define NT_STATUS_PWD_TOO_RECENT 0xC0000000 | 0x025b
+#define NT_STATUS_PWD_HISTORY_CONFLICT 0xC0000000 | 0x025c
+#define NT_STATUS_PLUGPLAY_NO_DEVICE 0xC0000000 | 0x025e
+#define NT_STATUS_UNSUPPORTED_COMPRESSION 0xC0000000 | 0x025f
+#define NT_STATUS_INVALID_HW_PROFILE 0xC0000000 | 0x0260
+#define NT_STATUS_INVALID_PLUGPLAY_DEVICE_PATH 0xC0000000 | 0x0261
+#define NT_STATUS_DRIVER_ORDINAL_NOT_FOUND 0xC0000000 | 0x0262
+#define NT_STATUS_DRIVER_ENTRYPOINT_NOT_FOUND 0xC0000000 | 0x0263
+#define NT_STATUS_RESOURCE_NOT_OWNED 0xC0000000 | 0x0264
+#define NT_STATUS_TOO_MANY_LINKS 0xC0000000 | 0x0265
+#define NT_STATUS_QUOTA_LIST_INCONSISTENT 0xC0000000 | 0x0266
+#define NT_STATUS_FILE_IS_OFFLINE 0xC0000000 | 0x0267
+#define NT_STATUS_NO_SUCH_JOB 0xC0000000 | 0xEDE	/* scheduler */
+
+#endif				/* _NTERR_H */
diff --git a/fs/smb/client/ntlmssp.h b/fs/smb/client/ntlmssp.h
new file mode 100644
index 0000000000..2c5dde2ece
--- /dev/null
+++ b/fs/smb/client/ntlmssp.h
@@ -0,0 +1,157 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+/*
+ *
+ *   Copyright (c) International Business Machines  Corp., 2002,2007
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ */
+
+#define NTLMSSP_SIGNATURE "NTLMSSP"
+/* Message Types */
+#define NtLmNegotiate     cpu_to_le32(1)
+#define NtLmChallenge     cpu_to_le32(2)
+#define NtLmAuthenticate  cpu_to_le32(3)
+#define UnknownMessage    cpu_to_le32(8)
+
+/* Negotiate Flags */
+#define NTLMSSP_NEGOTIATE_UNICODE         0x01 /* Text strings are unicode */
+#define NTLMSSP_NEGOTIATE_OEM             0x02 /* Text strings are in OEM */
+#define NTLMSSP_REQUEST_TARGET            0x04 /* Srv returns its auth realm */
+/* define reserved9                       0x08 */
+#define NTLMSSP_NEGOTIATE_SIGN          0x0010 /* Request signing capability */
+#define NTLMSSP_NEGOTIATE_SEAL          0x0020 /* Request confidentiality */
+#define NTLMSSP_NEGOTIATE_DGRAM         0x0040
+#define NTLMSSP_NEGOTIATE_LM_KEY        0x0080 /* Use LM session key */
+/* defined reserved 8                   0x0100 */
+#define NTLMSSP_NEGOTIATE_NTLM          0x0200 /* NTLM authentication */
+#define NTLMSSP_NEGOTIATE_NT_ONLY       0x0400 /* Lanman not allowed */
+#define NTLMSSP_ANONYMOUS               0x0800
+#define NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED 0x1000 /* reserved6 */
+#define NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED 0x2000
+#define NTLMSSP_NEGOTIATE_LOCAL_CALL    0x4000 /* client/server same machine */
+#define NTLMSSP_NEGOTIATE_ALWAYS_SIGN   0x8000 /* Sign. All security levels  */
+#define NTLMSSP_TARGET_TYPE_DOMAIN     0x10000
+#define NTLMSSP_TARGET_TYPE_SERVER     0x20000
+#define NTLMSSP_TARGET_TYPE_SHARE      0x40000
+#define NTLMSSP_NEGOTIATE_EXTENDED_SEC 0x80000 /* NB:not related to NTLMv2 pwd*/
+/* #define NTLMSSP_REQUEST_INIT_RESP     0x100000 */
+#define NTLMSSP_NEGOTIATE_IDENTIFY    0x100000
+#define NTLMSSP_REQUEST_ACCEPT_RESP   0x200000 /* reserved5 */
+#define NTLMSSP_REQUEST_NON_NT_KEY    0x400000
+#define NTLMSSP_NEGOTIATE_TARGET_INFO 0x800000
+/* #define reserved4                 0x1000000 */
+#define NTLMSSP_NEGOTIATE_VERSION    0x2000000 /* we only set for SMB2+ */
+/* #define reserved3                 0x4000000 */
+/* #define reserved2                 0x8000000 */
+/* #define reserved1                0x10000000 */
+#define NTLMSSP_NEGOTIATE_128       0x20000000
+#define NTLMSSP_NEGOTIATE_KEY_XCH   0x40000000
+#define NTLMSSP_NEGOTIATE_56        0x80000000
+
+/* Define AV Pair Field IDs */
+enum av_field_type {
+	NTLMSSP_AV_EOL = 0,
+	NTLMSSP_AV_NB_COMPUTER_NAME,
+	NTLMSSP_AV_NB_DOMAIN_NAME,
+	NTLMSSP_AV_DNS_COMPUTER_NAME,
+	NTLMSSP_AV_DNS_DOMAIN_NAME,
+	NTLMSSP_AV_DNS_TREE_NAME,
+	NTLMSSP_AV_FLAGS,
+	NTLMSSP_AV_TIMESTAMP,
+	NTLMSSP_AV_RESTRICTION,
+	NTLMSSP_AV_TARGET_NAME,
+	NTLMSSP_AV_CHANNEL_BINDINGS
+};
+
+/* Although typedefs are not commonly used for structure definitions */
+/* in the Linux kernel, in this particular case they are useful      */
+/* to more closely match the standards document for NTLMSSP from     */
+/* OpenGroup and to make the code more closely match the standard in */
+/* appearance */
+
+typedef struct _SECURITY_BUFFER {
+	__le16 Length;
+	__le16 MaximumLength;
+	__le32 BufferOffset;	/* offset to buffer */
+} __attribute__((packed)) SECURITY_BUFFER;
+
+typedef struct _NEGOTIATE_MESSAGE {
+	__u8 Signature[sizeof(NTLMSSP_SIGNATURE)];
+	__le32 MessageType;     /* NtLmNegotiate = 1 */
+	__le32 NegotiateFlags;
+	SECURITY_BUFFER DomainName;	/* RFC 1001 style and ASCII */
+	SECURITY_BUFFER WorkstationName;	/* RFC 1001 and ASCII */
+	/* SECURITY_BUFFER for version info not present since we
+	   do not set the version is present flag */
+	char DomainString[];
+	/* followed by WorkstationString */
+} __attribute__((packed)) NEGOTIATE_MESSAGE, *PNEGOTIATE_MESSAGE;
+
+#define NTLMSSP_REVISION_W2K3 0x0F
+
+/* See MS-NLMP section 2.2.2.10 */
+struct ntlmssp_version {
+	__u8	ProductMajorVersion;
+	__u8	ProductMinorVersion;
+	__le16	ProductBuild; /* we send the cifs.ko module version here */
+	__u8	Reserved[3];
+	__u8	NTLMRevisionCurrent; /* currently 0x0F */
+} __packed;
+
+/* see MS-NLMP section 2.2.1.1 */
+struct negotiate_message {
+	__u8 Signature[sizeof(NTLMSSP_SIGNATURE)];
+	__le32 MessageType;     /* NtLmNegotiate = 1 */
+	__le32 NegotiateFlags;
+	SECURITY_BUFFER DomainName;	/* RFC 1001 style and ASCII */
+	SECURITY_BUFFER WorkstationName;	/* RFC 1001 and ASCII */
+	struct	ntlmssp_version Version;
+	/* SECURITY_BUFFER */
+	char DomainString[];
+	/* followed by WorkstationString */
+} __packed;
+
+typedef struct _CHALLENGE_MESSAGE {
+	__u8 Signature[sizeof(NTLMSSP_SIGNATURE)];
+	__le32 MessageType;   /* NtLmChallenge = 2 */
+	SECURITY_BUFFER TargetName;
+	__le32 NegotiateFlags;
+	__u8 Challenge[CIFS_CRYPTO_KEY_SIZE];
+	__u8 Reserved[8];
+	SECURITY_BUFFER TargetInfoArray;
+	/* SECURITY_BUFFER for version info not present since we
+	   do not set the version is present flag */
+} __attribute__((packed)) CHALLENGE_MESSAGE, *PCHALLENGE_MESSAGE;
+
+typedef struct _AUTHENTICATE_MESSAGE {
+	__u8 Signature[sizeof(NTLMSSP_SIGNATURE)];
+	__le32 MessageType;  /* NtLmsAuthenticate = 3 */
+	SECURITY_BUFFER LmChallengeResponse;
+	SECURITY_BUFFER NtChallengeResponse;
+	SECURITY_BUFFER DomainName;
+	SECURITY_BUFFER UserName;
+	SECURITY_BUFFER WorkstationName;
+	SECURITY_BUFFER SessionKey;
+	__le32 NegotiateFlags;
+	/* SECURITY_BUFFER for version info not present since we
+	   do not set the version is present flag */
+	char UserString[];
+} __attribute__((packed)) AUTHENTICATE_MESSAGE, *PAUTHENTICATE_MESSAGE;
+
+/*
+ * Size of the session key (crypto key encrypted with the password
+ */
+
+int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len, struct cifs_ses *ses);
+int build_ntlmssp_negotiate_blob(unsigned char **pbuffer, u16 *buflen,
+				 struct cifs_ses *ses,
+				 struct TCP_Server_Info *server,
+				 const struct nls_table *nls_cp);
+int build_ntlmssp_smb3_negotiate_blob(unsigned char **pbuffer, u16 *buflen,
+				 struct cifs_ses *ses,
+				 struct TCP_Server_Info *server,
+				 const struct nls_table *nls_cp);
+int build_ntlmssp_auth_blob(unsigned char **pbuffer, u16 *buflen,
+			struct cifs_ses *ses,
+			struct TCP_Server_Info *server,
+			const struct nls_table *nls_cp);
diff --git a/fs/smb/client/readdir.c b/fs/smb/client/readdir.c
new file mode 100644
index 0000000000..d30ea2005e
--- /dev/null
+++ b/fs/smb/client/readdir.c
@@ -0,0 +1,1232 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *
+ *   Directory search handling
+ *
+ *   Copyright (C) International Business Machines  Corp., 2004, 2008
+ *   Copyright (C) Red Hat, Inc., 2011
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ */
+#include <linux/fs.h>
+#include <linux/pagemap.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_unicode.h"
+#include "cifs_debug.h"
+#include "cifs_fs_sb.h"
+#include "cifsfs.h"
+#include "smb2proto.h"
+#include "fs_context.h"
+#include "cached_dir.h"
+
+/*
+ * To be safe - for UCS to UTF-8 with strings loaded with the rare long
+ * characters alloc more to account for such multibyte target UTF-8
+ * characters.
+ */
+#define UNICODE_NAME_MAX ((4 * NAME_MAX) + 2)
+
+#ifdef CONFIG_CIFS_DEBUG2
+static void dump_cifs_file_struct(struct file *file, char *label)
+{
+	struct cifsFileInfo *cf;
+
+	if (file) {
+		cf = file->private_data;
+		if (cf == NULL) {
+			cifs_dbg(FYI, "empty cifs private file data\n");
+			return;
+		}
+		if (cf->invalidHandle)
+			cifs_dbg(FYI, "Invalid handle\n");
+		if (cf->srch_inf.endOfSearch)
+			cifs_dbg(FYI, "end of search\n");
+		if (cf->srch_inf.emptyDir)
+			cifs_dbg(FYI, "empty dir\n");
+	}
+}
+#else
+static inline void dump_cifs_file_struct(struct file *file, char *label)
+{
+}
+#endif /* DEBUG2 */
+
+/*
+ * Attempt to preload the dcache with the results from the FIND_FIRST/NEXT
+ *
+ * Find the dentry that matches "name". If there isn't one, create one. If it's
+ * a negative dentry or the uniqueid or filetype(mode) changed,
+ * then drop it and recreate it.
+ */
+static void
+cifs_prime_dcache(struct dentry *parent, struct qstr *name,
+		    struct cifs_fattr *fattr)
+{
+	struct dentry *dentry, *alias;
+	struct inode *inode;
+	struct super_block *sb = parent->d_sb;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
+
+	cifs_dbg(FYI, "%s: for %s\n", __func__, name->name);
+
+	dentry = d_hash_and_lookup(parent, name);
+	if (!dentry) {
+		/*
+		 * If we know that the inode will need to be revalidated
+		 * immediately, then don't create a new dentry for it.
+		 * We'll end up doing an on the wire call either way and
+		 * this spares us an invalidation.
+		 */
+		if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL)
+			return;
+retry:
+		dentry = d_alloc_parallel(parent, name, &wq);
+	}
+	if (IS_ERR(dentry))
+		return;
+	if (!d_in_lookup(dentry)) {
+		inode = d_inode(dentry);
+		if (inode) {
+			if (d_mountpoint(dentry)) {
+				dput(dentry);
+				return;
+			}
+			/*
+			 * If we're generating inode numbers, then we don't
+			 * want to clobber the existing one with the one that
+			 * the readdir code created.
+			 */
+			if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM))
+				fattr->cf_uniqueid = CIFS_I(inode)->uniqueid;
+
+			/* update inode in place
+			 * if both i_ino and i_mode didn't change */
+			if (CIFS_I(inode)->uniqueid == fattr->cf_uniqueid &&
+			    cifs_fattr_to_inode(inode, fattr) == 0) {
+				dput(dentry);
+				return;
+			}
+		}
+		d_invalidate(dentry);
+		dput(dentry);
+		goto retry;
+	} else {
+		inode = cifs_iget(sb, fattr);
+		if (!inode)
+			inode = ERR_PTR(-ENOMEM);
+		alias = d_splice_alias(inode, dentry);
+		d_lookup_done(dentry);
+		if (alias && !IS_ERR(alias))
+			dput(alias);
+	}
+	dput(dentry);
+}
+
+static bool reparse_file_needs_reval(const struct cifs_fattr *fattr)
+{
+	if (!(fattr->cf_cifsattrs & ATTR_REPARSE))
+		return false;
+	/*
+	 * The DFS tags should be only intepreted by server side as per
+	 * MS-FSCC 2.1.2.1, but let's include them anyway.
+	 *
+	 * Besides, if cf_cifstag is unset (0), then we still need it to be
+	 * revalidated to know exactly what reparse point it is.
+	 */
+	switch (fattr->cf_cifstag) {
+	case IO_REPARSE_TAG_DFS:
+	case IO_REPARSE_TAG_DFSR:
+	case IO_REPARSE_TAG_SYMLINK:
+	case IO_REPARSE_TAG_NFS:
+	case IO_REPARSE_TAG_MOUNT_POINT:
+	case 0:
+		return true;
+	}
+	return false;
+}
+
+static void
+cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb)
+{
+	struct cifs_open_info_data data = {
+		.reparse = { .tag = fattr->cf_cifstag, },
+	};
+
+	fattr->cf_uid = cifs_sb->ctx->linux_uid;
+	fattr->cf_gid = cifs_sb->ctx->linux_gid;
+
+	/*
+	 * The IO_REPARSE_TAG_LX_ tags originally were used by WSL but they
+	 * are preferred by the Linux client in some cases since, unlike
+	 * the NFS reparse tag (or EAs), they don't require an extra query
+	 * to determine which type of special file they represent.
+	 * TODO: go through all documented  reparse tags to see if we can
+	 * reasonably map some of them to directories vs. files vs. symlinks
+	 */
+	if ((fattr->cf_cifsattrs & ATTR_REPARSE) &&
+	    cifs_reparse_point_to_fattr(cifs_sb, fattr, &data))
+		goto out_reparse;
+
+	if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
+		fattr->cf_mode = S_IFDIR | cifs_sb->ctx->dir_mode;
+		fattr->cf_dtype = DT_DIR;
+	} else {
+		fattr->cf_mode = S_IFREG | cifs_sb->ctx->file_mode;
+		fattr->cf_dtype = DT_REG;
+	}
+
+out_reparse:
+	/*
+	 * We need to revalidate it further to make a decision about whether it
+	 * is a symbolic link, DFS referral or a reparse point with a direct
+	 * access like junctions, deduplicated files, NFS symlinks.
+	 */
+	if (reparse_file_needs_reval(fattr))
+		fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
+
+	/* non-unix readdir doesn't provide nlink */
+	fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
+
+	if (fattr->cf_cifsattrs & ATTR_READONLY)
+		fattr->cf_mode &= ~S_IWUGO;
+
+	/*
+	 * We of course don't get ACL info in FIND_FIRST/NEXT results, so
+	 * mark it for revalidation so that "ls -l" will look right. It might
+	 * be super-slow, but if we don't do this then the ownership of files
+	 * may look wrong since the inodes may not have timed out by the time
+	 * "ls" does a stat() call on them.
+	 */
+	if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) ||
+	    (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID))
+		fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
+
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL &&
+	    fattr->cf_cifsattrs & ATTR_SYSTEM) {
+		if (fattr->cf_eof == 0)  {
+			fattr->cf_mode &= ~S_IFMT;
+			fattr->cf_mode |= S_IFIFO;
+			fattr->cf_dtype = DT_FIFO;
+		} else {
+			/*
+			 * trying to get the type and mode via SFU can be slow,
+			 * so just call those regular files for now, and mark
+			 * for reval
+			 */
+			fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
+		}
+	}
+}
+
+/* Fill a cifs_fattr struct with info from SMB_FIND_FILE_POSIX_INFO. */
+static void
+cifs_posix_to_fattr(struct cifs_fattr *fattr, struct smb2_posix_info *info,
+		    struct cifs_sb_info *cifs_sb)
+{
+	struct smb2_posix_info_parsed parsed;
+
+	posix_info_parse(info, NULL, &parsed);
+
+	memset(fattr, 0, sizeof(*fattr));
+	fattr->cf_uniqueid = le64_to_cpu(info->Inode);
+	fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
+	fattr->cf_eof = le64_to_cpu(info->EndOfFile);
+
+	fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
+	fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
+	fattr->cf_ctime = cifs_NTtimeToUnix(info->CreationTime);
+
+	fattr->cf_nlink = le32_to_cpu(info->HardLinks);
+	fattr->cf_cifsattrs = le32_to_cpu(info->DosAttributes);
+
+	/*
+	 * Since we set the inode type below we need to mask off
+	 * to avoid strange results if bits set above.
+	 * XXX: why not make server&client use the type bits?
+	 */
+	fattr->cf_mode = le32_to_cpu(info->Mode) & ~S_IFMT;
+
+	cifs_dbg(FYI, "posix fattr: dev %d, reparse %d, mode %o\n",
+		 le32_to_cpu(info->DeviceId),
+		 le32_to_cpu(info->ReparseTag),
+		 le32_to_cpu(info->Mode));
+
+	if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
+		fattr->cf_mode |= S_IFDIR;
+		fattr->cf_dtype = DT_DIR;
+	} else {
+		/*
+		 * mark anything that is not a dir as regular
+		 * file. special files should have the REPARSE
+		 * attribute and will be marked as needing revaluation
+		 */
+		fattr->cf_mode |= S_IFREG;
+		fattr->cf_dtype = DT_REG;
+	}
+
+	if (reparse_file_needs_reval(fattr))
+		fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
+
+	sid_to_id(cifs_sb, &parsed.owner, fattr, SIDOWNER);
+	sid_to_id(cifs_sb, &parsed.group, fattr, SIDGROUP);
+}
+
+static void __dir_info_to_fattr(struct cifs_fattr *fattr, const void *info)
+{
+	const FILE_DIRECTORY_INFO *fi = info;
+
+	memset(fattr, 0, sizeof(*fattr));
+	fattr->cf_cifsattrs = le32_to_cpu(fi->ExtFileAttributes);
+	fattr->cf_eof = le64_to_cpu(fi->EndOfFile);
+	fattr->cf_bytes = le64_to_cpu(fi->AllocationSize);
+	fattr->cf_createtime = le64_to_cpu(fi->CreationTime);
+	fattr->cf_atime = cifs_NTtimeToUnix(fi->LastAccessTime);
+	fattr->cf_ctime = cifs_NTtimeToUnix(fi->ChangeTime);
+	fattr->cf_mtime = cifs_NTtimeToUnix(fi->LastWriteTime);
+}
+
+void
+cifs_dir_info_to_fattr(struct cifs_fattr *fattr, FILE_DIRECTORY_INFO *info,
+		       struct cifs_sb_info *cifs_sb)
+{
+	__dir_info_to_fattr(fattr, info);
+	cifs_fill_common_info(fattr, cifs_sb);
+}
+
+static void cifs_fulldir_info_to_fattr(struct cifs_fattr *fattr,
+				       SEARCH_ID_FULL_DIR_INFO *info,
+				       struct cifs_sb_info *cifs_sb)
+{
+	__dir_info_to_fattr(fattr, info);
+
+	/* See MS-FSCC 2.4.19 FileIdFullDirectoryInformation */
+	if (fattr->cf_cifsattrs & ATTR_REPARSE)
+		fattr->cf_cifstag = le32_to_cpu(info->EaSize);
+	cifs_fill_common_info(fattr, cifs_sb);
+}
+
+static void
+cifs_std_info_to_fattr(struct cifs_fattr *fattr, FIND_FILE_STANDARD_INFO *info,
+		       struct cifs_sb_info *cifs_sb)
+{
+	int offset = cifs_sb_master_tcon(cifs_sb)->ses->server->timeAdj;
+
+	memset(fattr, 0, sizeof(*fattr));
+	fattr->cf_atime = cnvrtDosUnixTm(info->LastAccessDate,
+					    info->LastAccessTime, offset);
+	fattr->cf_ctime = cnvrtDosUnixTm(info->LastWriteDate,
+					    info->LastWriteTime, offset);
+	fattr->cf_mtime = cnvrtDosUnixTm(info->LastWriteDate,
+					    info->LastWriteTime, offset);
+
+	fattr->cf_cifsattrs = le16_to_cpu(info->Attributes);
+	fattr->cf_bytes = le32_to_cpu(info->AllocationSize);
+	fattr->cf_eof = le32_to_cpu(info->DataSize);
+
+	cifs_fill_common_info(fattr, cifs_sb);
+}
+
+/* BB eventually need to add the following helper function to
+      resolve NT_STATUS_STOPPED_ON_SYMLINK return code when
+      we try to do FindFirst on (NTFS) directory symlinks */
+/*
+int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb,
+			     unsigned int xid)
+{
+	__u16 fid;
+	int len;
+	int oplock = 0;
+	int rc;
+	struct cifs_tcon *ptcon = cifs_sb_tcon(cifs_sb);
+	char *tmpbuffer;
+
+	rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ,
+			OPEN_REPARSE_POINT, &fid, &oplock, NULL,
+			cifs_sb->local_nls,
+			cifs_remap(cifs_sb);
+	if (!rc) {
+		tmpbuffer = kmalloc(maxpath);
+		rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path,
+				tmpbuffer,
+				maxpath -1,
+				fid,
+				cifs_sb->local_nls);
+		if (CIFSSMBClose(xid, ptcon, fid)) {
+			cifs_dbg(FYI, "Error closing temporary reparsepoint open\n");
+		}
+	}
+}
+ */
+
+static int
+_initiate_cifs_search(const unsigned int xid, struct file *file,
+		     const char *full_path)
+{
+	__u16 search_flags;
+	int rc = 0;
+	struct cifsFileInfo *cifsFile;
+	struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);
+	struct tcon_link *tlink = NULL;
+	struct cifs_tcon *tcon;
+	struct TCP_Server_Info *server;
+
+	if (file->private_data == NULL) {
+		tlink = cifs_sb_tlink(cifs_sb);
+		if (IS_ERR(tlink))
+			return PTR_ERR(tlink);
+
+		cifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
+		if (cifsFile == NULL) {
+			rc = -ENOMEM;
+			goto error_exit;
+		}
+		spin_lock_init(&cifsFile->file_info_lock);
+		file->private_data = cifsFile;
+		cifsFile->tlink = cifs_get_tlink(tlink);
+		tcon = tlink_tcon(tlink);
+	} else {
+		cifsFile = file->private_data;
+		tcon = tlink_tcon(cifsFile->tlink);
+	}
+
+	server = tcon->ses->server;
+
+	if (!server->ops->query_dir_first) {
+		rc = -ENOSYS;
+		goto error_exit;
+	}
+
+	cifsFile->invalidHandle = true;
+	cifsFile->srch_inf.endOfSearch = false;
+
+	cifs_dbg(FYI, "Full path: %s start at: %lld\n", full_path, file->f_pos);
+
+ffirst_retry:
+	/* test for Unix extensions */
+	/* but now check for them on the share/mount not on the SMB session */
+	/* if (cap_unix(tcon->ses) { */
+	if (tcon->unix_ext)
+		cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
+	else if (tcon->posix_extensions)
+		cifsFile->srch_inf.info_level = SMB_FIND_FILE_POSIX_INFO;
+	else if ((tcon->ses->capabilities &
+		  tcon->ses->server->vals->cap_nt_find) == 0) {
+		cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
+	} else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
+		cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
+	} else /* not srvinos - BB fixme add check for backlevel? */ {
+		cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
+	}
+
+	search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME;
+	if (backup_cred(cifs_sb))
+		search_flags |= CIFS_SEARCH_BACKUP_SEARCH;
+
+	rc = server->ops->query_dir_first(xid, tcon, full_path, cifs_sb,
+					  &cifsFile->fid, search_flags,
+					  &cifsFile->srch_inf);
+
+	if (rc == 0)
+		cifsFile->invalidHandle = false;
+	/* BB add following call to handle readdir on new NTFS symlink errors
+	else if STATUS_STOPPED_ON_SYMLINK
+		call get_symlink_reparse_path and retry with new path */
+	else if ((rc == -EOPNOTSUPP) &&
+		(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
+		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
+		goto ffirst_retry;
+	}
+error_exit:
+	cifs_put_tlink(tlink);
+	return rc;
+}
+
+static int
+initiate_cifs_search(const unsigned int xid, struct file *file,
+		     const char *full_path)
+{
+	int rc, retry_count = 0;
+
+	do {
+		rc = _initiate_cifs_search(xid, file, full_path);
+		/*
+		 * If we don't have enough credits to start reading the
+		 * directory just try again after short wait.
+		 */
+		if (rc != -EDEADLK)
+			break;
+
+		usleep_range(512, 2048);
+	} while (retry_count++ < 5);
+
+	return rc;
+}
+
+/* return length of unicode string in bytes */
+static int cifs_unicode_bytelen(const char *str)
+{
+	int len;
+	const __le16 *ustr = (const __le16 *)str;
+
+	for (len = 0; len <= PATH_MAX; len++) {
+		if (ustr[len] == 0)
+			return len << 1;
+	}
+	cifs_dbg(FYI, "Unicode string longer than PATH_MAX found\n");
+	return len << 1;
+}
+
+static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
+{
+	char *new_entry;
+	FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
+
+	if (level == SMB_FIND_FILE_INFO_STANDARD) {
+		FIND_FILE_STANDARD_INFO *pfData;
+		pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
+
+		new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) + 1 +
+				pfData->FileNameLength;
+	} else {
+		u32 next_offset = le32_to_cpu(pDirInfo->NextEntryOffset);
+
+		if (old_entry + next_offset < old_entry) {
+			cifs_dbg(VFS, "Invalid offset %u\n", next_offset);
+			return NULL;
+		}
+		new_entry = old_entry + next_offset;
+	}
+	cifs_dbg(FYI, "new entry %p old entry %p\n", new_entry, old_entry);
+	/* validate that new_entry is not past end of SMB */
+	if (new_entry >= end_of_smb) {
+		cifs_dbg(VFS, "search entry %p began after end of SMB %p old entry %p\n",
+			 new_entry, end_of_smb, old_entry);
+		return NULL;
+	} else if (((level == SMB_FIND_FILE_INFO_STANDARD) &&
+		    (new_entry + sizeof(FIND_FILE_STANDARD_INFO) + 1 > end_of_smb))
+		  || ((level != SMB_FIND_FILE_INFO_STANDARD) &&
+		   (new_entry + sizeof(FILE_DIRECTORY_INFO) + 1 > end_of_smb)))  {
+		cifs_dbg(VFS, "search entry %p extends after end of SMB %p\n",
+			 new_entry, end_of_smb);
+		return NULL;
+	} else
+		return new_entry;
+
+}
+
+struct cifs_dirent {
+	const char	*name;
+	size_t		namelen;
+	u32		resume_key;
+	u64		ino;
+};
+
+static void cifs_fill_dirent_posix(struct cifs_dirent *de,
+				   const struct smb2_posix_info *info)
+{
+	struct smb2_posix_info_parsed parsed;
+
+	/* payload should have already been checked at this point */
+	if (posix_info_parse(info, NULL, &parsed) < 0) {
+		cifs_dbg(VFS, "Invalid POSIX info payload\n");
+		return;
+	}
+
+	de->name = parsed.name;
+	de->namelen = parsed.name_len;
+	de->resume_key = info->Ignored;
+	de->ino = le64_to_cpu(info->Inode);
+}
+
+static void cifs_fill_dirent_unix(struct cifs_dirent *de,
+		const FILE_UNIX_INFO *info, bool is_unicode)
+{
+	de->name = &info->FileName[0];
+	if (is_unicode)
+		de->namelen = cifs_unicode_bytelen(de->name);
+	else
+		de->namelen = strnlen(de->name, PATH_MAX);
+	de->resume_key = info->ResumeKey;
+	de->ino = le64_to_cpu(info->basic.UniqueId);
+}
+
+static void cifs_fill_dirent_dir(struct cifs_dirent *de,
+		const FILE_DIRECTORY_INFO *info)
+{
+	de->name = &info->FileName[0];
+	de->namelen = le32_to_cpu(info->FileNameLength);
+	de->resume_key = info->FileIndex;
+}
+
+static void cifs_fill_dirent_full(struct cifs_dirent *de,
+		const FILE_FULL_DIRECTORY_INFO *info)
+{
+	de->name = &info->FileName[0];
+	de->namelen = le32_to_cpu(info->FileNameLength);
+	de->resume_key = info->FileIndex;
+}
+
+static void cifs_fill_dirent_search(struct cifs_dirent *de,
+		const SEARCH_ID_FULL_DIR_INFO *info)
+{
+	de->name = &info->FileName[0];
+	de->namelen = le32_to_cpu(info->FileNameLength);
+	de->resume_key = info->FileIndex;
+	de->ino = le64_to_cpu(info->UniqueId);
+}
+
+static void cifs_fill_dirent_both(struct cifs_dirent *de,
+		const FILE_BOTH_DIRECTORY_INFO *info)
+{
+	de->name = &info->FileName[0];
+	de->namelen = le32_to_cpu(info->FileNameLength);
+	de->resume_key = info->FileIndex;
+}
+
+static void cifs_fill_dirent_std(struct cifs_dirent *de,
+		const FIND_FILE_STANDARD_INFO *info)
+{
+	de->name = &info->FileName[0];
+	/* one byte length, no endianess conversion */
+	de->namelen = info->FileNameLength;
+	de->resume_key = info->ResumeKey;
+}
+
+static int cifs_fill_dirent(struct cifs_dirent *de, const void *info,
+		u16 level, bool is_unicode)
+{
+	memset(de, 0, sizeof(*de));
+
+	switch (level) {
+	case SMB_FIND_FILE_POSIX_INFO:
+		cifs_fill_dirent_posix(de, info);
+		break;
+	case SMB_FIND_FILE_UNIX:
+		cifs_fill_dirent_unix(de, info, is_unicode);
+		break;
+	case SMB_FIND_FILE_DIRECTORY_INFO:
+		cifs_fill_dirent_dir(de, info);
+		break;
+	case SMB_FIND_FILE_FULL_DIRECTORY_INFO:
+		cifs_fill_dirent_full(de, info);
+		break;
+	case SMB_FIND_FILE_ID_FULL_DIR_INFO:
+		cifs_fill_dirent_search(de, info);
+		break;
+	case SMB_FIND_FILE_BOTH_DIRECTORY_INFO:
+		cifs_fill_dirent_both(de, info);
+		break;
+	case SMB_FIND_FILE_INFO_STANDARD:
+		cifs_fill_dirent_std(de, info);
+		break;
+	default:
+		cifs_dbg(FYI, "Unknown findfirst level %d\n", level);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+#define UNICODE_DOT cpu_to_le16(0x2e)
+
+/* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
+static int cifs_entry_is_dot(struct cifs_dirent *de, bool is_unicode)
+{
+	int rc = 0;
+
+	if (!de->name)
+		return 0;
+
+	if (is_unicode) {
+		__le16 *ufilename = (__le16 *)de->name;
+		if (de->namelen == 2) {
+			/* check for . */
+			if (ufilename[0] == UNICODE_DOT)
+				rc = 1;
+		} else if (de->namelen == 4) {
+			/* check for .. */
+			if (ufilename[0] == UNICODE_DOT &&
+			    ufilename[1] == UNICODE_DOT)
+				rc = 2;
+		}
+	} else /* ASCII */ {
+		if (de->namelen == 1) {
+			if (de->name[0] == '.')
+				rc = 1;
+		} else if (de->namelen == 2) {
+			if (de->name[0] == '.' && de->name[1] == '.')
+				rc = 2;
+		}
+	}
+
+	return rc;
+}
+
+/* Check if directory that we are searching has changed so we can decide
+   whether we can use the cached search results from the previous search */
+static int is_dir_changed(struct file *file)
+{
+	struct inode *inode = file_inode(file);
+	struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
+
+	if (cifsInfo->time == 0)
+		return 1; /* directory was changed, perhaps due to unlink */
+	else
+		return 0;
+
+}
+
+static int cifs_save_resume_key(const char *current_entry,
+	struct cifsFileInfo *file_info)
+{
+	struct cifs_dirent de;
+	int rc;
+
+	rc = cifs_fill_dirent(&de, current_entry, file_info->srch_inf.info_level,
+			      file_info->srch_inf.unicode);
+	if (!rc) {
+		file_info->srch_inf.presume_name = de.name;
+		file_info->srch_inf.resume_name_len = de.namelen;
+		file_info->srch_inf.resume_key = de.resume_key;
+	}
+	return rc;
+}
+
+/*
+ * Find the corresponding entry in the search. Note that the SMB server returns
+ * search entries for . and .. which complicates logic here if we choose to
+ * parse for them and we do not assume that they are located in the findfirst
+ * return buffer. We start counting in the buffer with entry 2 and increment for
+ * every entry (do not increment for . or .. entry).
+ */
+static int
+find_cifs_entry(const unsigned int xid, struct cifs_tcon *tcon, loff_t pos,
+		struct file *file, const char *full_path,
+		char **current_entry, int *num_to_ret)
+{
+	__u16 search_flags;
+	int rc = 0;
+	int pos_in_buf = 0;
+	loff_t first_entry_in_buffer;
+	loff_t index_to_find = pos;
+	struct cifsFileInfo *cfile = file->private_data;
+	struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);
+	struct TCP_Server_Info *server = tcon->ses->server;
+	/* check if index in the buffer */
+
+	if (!server->ops->query_dir_first || !server->ops->query_dir_next)
+		return -ENOSYS;
+
+	if ((cfile == NULL) || (current_entry == NULL) || (num_to_ret == NULL))
+		return -ENOENT;
+
+	*current_entry = NULL;
+	first_entry_in_buffer = cfile->srch_inf.index_of_last_entry -
+					cfile->srch_inf.entries_in_buffer;
+
+	/*
+	 * If first entry in buf is zero then is first buffer
+	 * in search response data which means it is likely . and ..
+	 * will be in this buffer, although some servers do not return
+	 * . and .. for the root of a drive and for those we need
+	 * to start two entries earlier.
+	 */
+
+	dump_cifs_file_struct(file, "In fce ");
+	if (((index_to_find < cfile->srch_inf.index_of_last_entry) &&
+	     is_dir_changed(file)) || (index_to_find < first_entry_in_buffer)) {
+		/* close and restart search */
+		cifs_dbg(FYI, "search backing up - close and restart search\n");
+		spin_lock(&cfile->file_info_lock);
+		if (server->ops->dir_needs_close(cfile)) {
+			cfile->invalidHandle = true;
+			spin_unlock(&cfile->file_info_lock);
+			if (server->ops->close_dir)
+				server->ops->close_dir(xid, tcon, &cfile->fid);
+		} else
+			spin_unlock(&cfile->file_info_lock);
+		if (cfile->srch_inf.ntwrk_buf_start) {
+			cifs_dbg(FYI, "freeing SMB ff cache buf on search rewind\n");
+			if (cfile->srch_inf.smallBuf)
+				cifs_small_buf_release(cfile->srch_inf.
+						ntwrk_buf_start);
+			else
+				cifs_buf_release(cfile->srch_inf.
+						ntwrk_buf_start);
+			cfile->srch_inf.ntwrk_buf_start = NULL;
+		}
+		rc = initiate_cifs_search(xid, file, full_path);
+		if (rc) {
+			cifs_dbg(FYI, "error %d reinitiating a search on rewind\n",
+				 rc);
+			return rc;
+		}
+		/* FindFirst/Next set last_entry to NULL on malformed reply */
+		if (cfile->srch_inf.last_entry)
+			cifs_save_resume_key(cfile->srch_inf.last_entry, cfile);
+	}
+
+	search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME;
+	if (backup_cred(cifs_sb))
+		search_flags |= CIFS_SEARCH_BACKUP_SEARCH;
+
+	while ((index_to_find >= cfile->srch_inf.index_of_last_entry) &&
+	       (rc == 0) && !cfile->srch_inf.endOfSearch) {
+		cifs_dbg(FYI, "calling findnext2\n");
+		rc = server->ops->query_dir_next(xid, tcon, &cfile->fid,
+						 search_flags,
+						 &cfile->srch_inf);
+		/* FindFirst/Next set last_entry to NULL on malformed reply */
+		if (cfile->srch_inf.last_entry)
+			cifs_save_resume_key(cfile->srch_inf.last_entry, cfile);
+		if (rc)
+			return -ENOENT;
+	}
+	if (index_to_find < cfile->srch_inf.index_of_last_entry) {
+		/* we found the buffer that contains the entry */
+		/* scan and find it */
+		int i;
+		char *cur_ent;
+		char *end_of_smb;
+
+		if (cfile->srch_inf.ntwrk_buf_start == NULL) {
+			cifs_dbg(VFS, "ntwrk_buf_start is NULL during readdir\n");
+			return -EIO;
+		}
+
+		end_of_smb = cfile->srch_inf.ntwrk_buf_start +
+			server->ops->calc_smb_size(
+					cfile->srch_inf.ntwrk_buf_start);
+
+		cur_ent = cfile->srch_inf.srch_entries_start;
+		first_entry_in_buffer = cfile->srch_inf.index_of_last_entry
+					- cfile->srch_inf.entries_in_buffer;
+		pos_in_buf = index_to_find - first_entry_in_buffer;
+		cifs_dbg(FYI, "found entry - pos_in_buf %d\n", pos_in_buf);
+
+		for (i = 0; (i < (pos_in_buf)) && (cur_ent != NULL); i++) {
+			/* go entry by entry figuring out which is first */
+			cur_ent = nxt_dir_entry(cur_ent, end_of_smb,
+						cfile->srch_inf.info_level);
+		}
+		if ((cur_ent == NULL) && (i < pos_in_buf)) {
+			/* BB fixme - check if we should flag this error */
+			cifs_dbg(VFS, "reached end of buf searching for pos in buf %d index to find %lld rc %d\n",
+				 pos_in_buf, index_to_find, rc);
+		}
+		rc = 0;
+		*current_entry = cur_ent;
+	} else {
+		cifs_dbg(FYI, "index not in buffer - could not findnext into it\n");
+		return 0;
+	}
+
+	if (pos_in_buf >= cfile->srch_inf.entries_in_buffer) {
+		cifs_dbg(FYI, "can not return entries pos_in_buf beyond last\n");
+		*num_to_ret = 0;
+	} else
+		*num_to_ret = cfile->srch_inf.entries_in_buffer - pos_in_buf;
+
+	return rc;
+}
+
+static bool emit_cached_dirents(struct cached_dirents *cde,
+				struct dir_context *ctx)
+{
+	struct cached_dirent *dirent;
+	bool rc;
+
+	list_for_each_entry(dirent, &cde->entries, entry) {
+		/*
+		 * Skip all early entries prior to the current lseek()
+		 * position.
+		 */
+		if (ctx->pos > dirent->pos)
+			continue;
+		/*
+		 * We recorded the current ->pos value for the dirent
+		 * when we stored it in the cache.
+		 * However, this sequence of ->pos values may have holes
+		 * in it, for example dot-dirs returned from the server
+		 * are suppressed.
+		 * Handle this bu forcing ctx->pos to be the same as the
+		 * ->pos of the current dirent we emit from the cache.
+		 * This means that when we emit these entries from the cache
+		 * we now emit them with the same ->pos value as in the
+		 * initial scan.
+		 */
+		ctx->pos = dirent->pos;
+		rc = dir_emit(ctx, dirent->name, dirent->namelen,
+			      dirent->fattr.cf_uniqueid,
+			      dirent->fattr.cf_dtype);
+		if (!rc)
+			return rc;
+		ctx->pos++;
+	}
+	return true;
+}
+
+static void update_cached_dirents_count(struct cached_dirents *cde,
+					struct dir_context *ctx)
+{
+	if (cde->ctx != ctx)
+		return;
+	if (cde->is_valid || cde->is_failed)
+		return;
+
+	cde->pos++;
+}
+
+static void finished_cached_dirents_count(struct cached_dirents *cde,
+					struct dir_context *ctx)
+{
+	if (cde->ctx != ctx)
+		return;
+	if (cde->is_valid || cde->is_failed)
+		return;
+	if (ctx->pos != cde->pos)
+		return;
+
+	cde->is_valid = 1;
+}
+
+static void add_cached_dirent(struct cached_dirents *cde,
+			      struct dir_context *ctx,
+			      const char *name, int namelen,
+			      struct cifs_fattr *fattr)
+{
+	struct cached_dirent *de;
+
+	if (cde->ctx != ctx)
+		return;
+	if (cde->is_valid || cde->is_failed)
+		return;
+	if (ctx->pos != cde->pos) {
+		cde->is_failed = 1;
+		return;
+	}
+	de = kzalloc(sizeof(*de), GFP_ATOMIC);
+	if (de == NULL) {
+		cde->is_failed = 1;
+		return;
+	}
+	de->namelen = namelen;
+	de->name = kstrndup(name, namelen, GFP_ATOMIC);
+	if (de->name == NULL) {
+		kfree(de);
+		cde->is_failed = 1;
+		return;
+	}
+	de->pos = ctx->pos;
+
+	memcpy(&de->fattr, fattr, sizeof(struct cifs_fattr));
+
+	list_add_tail(&de->entry, &cde->entries);
+}
+
+static bool cifs_dir_emit(struct dir_context *ctx,
+			  const char *name, int namelen,
+			  struct cifs_fattr *fattr,
+			  struct cached_fid *cfid)
+{
+	bool rc;
+	ino_t ino = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid);
+
+	rc = dir_emit(ctx, name, namelen, ino, fattr->cf_dtype);
+	if (!rc)
+		return rc;
+
+	if (cfid) {
+		mutex_lock(&cfid->dirents.de_mutex);
+		add_cached_dirent(&cfid->dirents, ctx, name, namelen,
+				  fattr);
+		mutex_unlock(&cfid->dirents.de_mutex);
+	}
+
+	return rc;
+}
+
+static int cifs_filldir(char *find_entry, struct file *file,
+			struct dir_context *ctx,
+			char *scratch_buf, unsigned int max_len,
+			struct cached_fid *cfid)
+{
+	struct cifsFileInfo *file_info = file->private_data;
+	struct super_block *sb = file_inode(file)->i_sb;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	struct cifs_dirent de = { NULL, };
+	struct cifs_fattr fattr;
+	struct qstr name;
+	int rc = 0;
+
+	rc = cifs_fill_dirent(&de, find_entry, file_info->srch_inf.info_level,
+			      file_info->srch_inf.unicode);
+	if (rc)
+		return rc;
+
+	if (de.namelen > max_len) {
+		cifs_dbg(VFS, "bad search response length %zd past smb end\n",
+			 de.namelen);
+		return -EINVAL;
+	}
+
+	/* skip . and .. since we added them first */
+	if (cifs_entry_is_dot(&de, file_info->srch_inf.unicode))
+		return 0;
+
+	if (file_info->srch_inf.unicode) {
+		struct nls_table *nlt = cifs_sb->local_nls;
+		int map_type;
+
+		map_type = cifs_remap(cifs_sb);
+		name.name = scratch_buf;
+		name.len =
+			cifs_from_utf16((char *)name.name, (__le16 *)de.name,
+					UNICODE_NAME_MAX,
+					min_t(size_t, de.namelen,
+					      (size_t)max_len), nlt, map_type);
+		name.len -= nls_nullsize(nlt);
+	} else {
+		name.name = de.name;
+		name.len = de.namelen;
+	}
+
+	switch (file_info->srch_inf.info_level) {
+	case SMB_FIND_FILE_POSIX_INFO:
+		cifs_posix_to_fattr(&fattr,
+				    (struct smb2_posix_info *)find_entry,
+				    cifs_sb);
+		break;
+	case SMB_FIND_FILE_UNIX:
+		cifs_unix_basic_to_fattr(&fattr,
+					 &((FILE_UNIX_INFO *)find_entry)->basic,
+					 cifs_sb);
+		if (S_ISLNK(fattr.cf_mode))
+			fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
+		break;
+	case SMB_FIND_FILE_INFO_STANDARD:
+		cifs_std_info_to_fattr(&fattr,
+				       (FIND_FILE_STANDARD_INFO *)find_entry,
+				       cifs_sb);
+		break;
+	case SMB_FIND_FILE_ID_FULL_DIR_INFO:
+		cifs_fulldir_info_to_fattr(&fattr,
+					   (SEARCH_ID_FULL_DIR_INFO *)find_entry,
+					   cifs_sb);
+		break;
+	default:
+		cifs_dir_info_to_fattr(&fattr,
+				       (FILE_DIRECTORY_INFO *)find_entry,
+				       cifs_sb);
+		break;
+	}
+
+	if (de.ino && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
+		fattr.cf_uniqueid = de.ino;
+	} else {
+		fattr.cf_uniqueid = iunique(sb, ROOT_I);
+		cifs_autodisable_serverino(cifs_sb);
+	}
+
+	if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) &&
+	    couldbe_mf_symlink(&fattr))
+		/*
+		 * trying to get the type and mode can be slow,
+		 * so just call those regular files for now, and mark
+		 * for reval
+		 */
+		fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
+
+	cifs_prime_dcache(file_dentry(file), &name, &fattr);
+
+	return !cifs_dir_emit(ctx, name.name, name.len,
+			      &fattr, cfid);
+}
+
+
+int cifs_readdir(struct file *file, struct dir_context *ctx)
+{
+	int rc = 0;
+	unsigned int xid;
+	int i;
+	struct tcon_link *tlink = NULL;
+	struct cifs_tcon *tcon;
+	struct cifsFileInfo *cifsFile;
+	char *current_entry;
+	int num_to_fill = 0;
+	char *tmp_buf = NULL;
+	char *end_of_smb;
+	unsigned int max_len;
+	const char *full_path;
+	void *page = alloc_dentry_path();
+	struct cached_fid *cfid = NULL;
+	struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);
+
+	xid = get_xid();
+
+	full_path = build_path_from_dentry(file_dentry(file), page);
+	if (IS_ERR(full_path)) {
+		rc = PTR_ERR(full_path);
+		goto rddir2_exit;
+	}
+
+	if (file->private_data == NULL) {
+		tlink = cifs_sb_tlink(cifs_sb);
+		if (IS_ERR(tlink))
+			goto cache_not_found;
+		tcon = tlink_tcon(tlink);
+	} else {
+		cifsFile = file->private_data;
+		tcon = tlink_tcon(cifsFile->tlink);
+	}
+
+	rc = open_cached_dir(xid, tcon, full_path, cifs_sb, false, &cfid);
+	cifs_put_tlink(tlink);
+	if (rc)
+		goto cache_not_found;
+
+	mutex_lock(&cfid->dirents.de_mutex);
+	/*
+	 * If this was reading from the start of the directory
+	 * we need to initialize scanning and storing the
+	 * directory content.
+	 */
+	if (ctx->pos == 0 && cfid->dirents.ctx == NULL) {
+		cfid->dirents.ctx = ctx;
+		cfid->dirents.pos = 2;
+	}
+	/*
+	 * If we already have the entire directory cached then
+	 * we can just serve the cache.
+	 */
+	if (cfid->dirents.is_valid) {
+		if (!dir_emit_dots(file, ctx)) {
+			mutex_unlock(&cfid->dirents.de_mutex);
+			goto rddir2_exit;
+		}
+		emit_cached_dirents(&cfid->dirents, ctx);
+		mutex_unlock(&cfid->dirents.de_mutex);
+		goto rddir2_exit;
+	}
+	mutex_unlock(&cfid->dirents.de_mutex);
+
+	/* Drop the cache while calling initiate_cifs_search and
+	 * find_cifs_entry in case there will be reconnects during
+	 * query_directory.
+	 */
+	close_cached_dir(cfid);
+	cfid = NULL;
+
+ cache_not_found:
+	/*
+	 * Ensure FindFirst doesn't fail before doing filldir() for '.' and
+	 * '..'. Otherwise we won't be able to notify VFS in case of failure.
+	 */
+	if (file->private_data == NULL) {
+		rc = initiate_cifs_search(xid, file, full_path);
+		cifs_dbg(FYI, "initiate cifs search rc %d\n", rc);
+		if (rc)
+			goto rddir2_exit;
+	}
+
+	if (!dir_emit_dots(file, ctx))
+		goto rddir2_exit;
+
+	/* 1) If search is active,
+		is in current search buffer?
+		if it before then restart search
+		if after then keep searching till find it */
+	cifsFile = file->private_data;
+	if (cifsFile->srch_inf.endOfSearch) {
+		if (cifsFile->srch_inf.emptyDir) {
+			cifs_dbg(FYI, "End of search, empty dir\n");
+			rc = 0;
+			goto rddir2_exit;
+		}
+	} /* else {
+		cifsFile->invalidHandle = true;
+		tcon->ses->server->close(xid, tcon, &cifsFile->fid);
+	} */
+
+	tcon = tlink_tcon(cifsFile->tlink);
+	rc = find_cifs_entry(xid, tcon, ctx->pos, file, full_path,
+			     &current_entry, &num_to_fill);
+	open_cached_dir(xid, tcon, full_path, cifs_sb, false, &cfid);
+	if (rc) {
+		cifs_dbg(FYI, "fce error %d\n", rc);
+		goto rddir2_exit;
+	} else if (current_entry != NULL) {
+		cifs_dbg(FYI, "entry %lld found\n", ctx->pos);
+	} else {
+		if (cfid) {
+			mutex_lock(&cfid->dirents.de_mutex);
+			finished_cached_dirents_count(&cfid->dirents, ctx);
+			mutex_unlock(&cfid->dirents.de_mutex);
+		}
+		cifs_dbg(FYI, "Could not find entry\n");
+		goto rddir2_exit;
+	}
+	cifs_dbg(FYI, "loop through %d times filling dir for net buf %p\n",
+		 num_to_fill, cifsFile->srch_inf.ntwrk_buf_start);
+	max_len = tcon->ses->server->ops->calc_smb_size(
+			cifsFile->srch_inf.ntwrk_buf_start);
+	end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
+
+	tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL);
+	if (tmp_buf == NULL) {
+		rc = -ENOMEM;
+		goto rddir2_exit;
+	}
+
+	for (i = 0; i < num_to_fill; i++) {
+		if (current_entry == NULL) {
+			/* evaluate whether this case is an error */
+			cifs_dbg(VFS, "past SMB end,  num to fill %d i %d\n",
+				 num_to_fill, i);
+			break;
+		}
+		/*
+		 * if buggy server returns . and .. late do we want to
+		 * check for that here?
+		 */
+		*tmp_buf = 0;
+		rc = cifs_filldir(current_entry, file, ctx,
+				  tmp_buf, max_len, cfid);
+		if (rc) {
+			if (rc > 0)
+				rc = 0;
+			break;
+		}
+
+		ctx->pos++;
+		if (cfid) {
+			mutex_lock(&cfid->dirents.de_mutex);
+			update_cached_dirents_count(&cfid->dirents, ctx);
+			mutex_unlock(&cfid->dirents.de_mutex);
+		}
+
+		if (ctx->pos ==
+			cifsFile->srch_inf.index_of_last_entry) {
+			cifs_dbg(FYI, "last entry in buf at pos %lld %s\n",
+				 ctx->pos, tmp_buf);
+			cifs_save_resume_key(current_entry, cifsFile);
+			break;
+		}
+		current_entry =
+			nxt_dir_entry(current_entry, end_of_smb,
+				      cifsFile->srch_inf.info_level);
+	}
+	kfree(tmp_buf);
+
+rddir2_exit:
+	if (cfid)
+		close_cached_dir(cfid);
+	free_dentry_path(page);
+	free_xid(xid);
+	return rc;
+}
diff --git a/fs/smb/client/rfc1002pdu.h b/fs/smb/client/rfc1002pdu.h
new file mode 100644
index 0000000000..ae1d025da2
--- /dev/null
+++ b/fs/smb/client/rfc1002pdu.h
@@ -0,0 +1,61 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+/*
+ *
+ *   Protocol Data Unit definitions for RFC 1001/1002 support
+ *
+ *   Copyright (c) International Business Machines  Corp., 2004
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ */
+
+/* NB: unlike smb/cifs packets, the RFC1002 structures are big endian */
+
+	/* RFC 1002 session packet types */
+#define RFC1002_SESSION_MESSAGE 0x00
+#define RFC1002_SESSION_REQUEST  0x81
+#define RFC1002_POSITIVE_SESSION_RESPONSE 0x82
+#define RFC1002_NEGATIVE_SESSION_RESPONSE 0x83
+#define RFC1002_RETARGET_SESSION_RESPONSE 0x84
+#define RFC1002_SESSION_KEEP_ALIVE 0x85
+
+	/* RFC 1002 flags (only one defined */
+#define RFC1002_LENGTH_EXTEND 0x80 /* high order bit of length (ie +64K) */
+
+struct rfc1002_session_packet {
+	__u8	type;
+	__u8	flags;
+	__u16	length;
+	union {
+		struct {
+			__u8 called_len;
+			__u8 called_name[32];
+			__u8 scope1; /* null */
+			__u8 calling_len;
+			__u8 calling_name[32];
+			__u8 scope2; /* null */
+		} __attribute__((packed)) session_req;
+		struct {
+			__u32 retarget_ip_addr;
+			__u16 port;
+		} __attribute__((packed)) retarget_resp;
+		__u8 neg_ses_resp_error_code;
+		/* POSITIVE_SESSION_RESPONSE packet does not include trailer.
+		SESSION_KEEP_ALIVE packet also does not include a trailer.
+		Trailer for the SESSION_MESSAGE packet is SMB/CIFS header */
+	} __attribute__((packed)) trailer;
+} __attribute__((packed));
+
+/* Negative Session Response error codes */
+#define RFC1002_NOT_LISTENING_CALLED  0x80 /* not listening on called name */
+#define RFC1002_NOT_LISTENING_CALLING 0x81 /* not listening on calling name */
+#define RFC1002_NOT_PRESENT           0x82 /* called name not present */
+#define RFC1002_INSUFFICIENT_RESOURCE 0x83
+#define RFC1002_UNSPECIFIED_ERROR     0x8F
+
+/* RFC 1002 Datagram service packets are not defined here as they
+are not needed for the network filesystem client unless we plan on
+implementing broadcast resolution of the server ip address (from
+server netbios name). Currently server names are resolved only via DNS
+(tcp name) or ip address or an /etc/hosts equivalent mapping to ip address.*/
+
+#define DEFAULT_CIFS_CALLED_NAME  "*SMBSERVER      "
diff --git a/fs/smb/client/sess.c b/fs/smb/client/sess.c
new file mode 100644
index 0000000000..62596299a3
--- /dev/null
+++ b/fs/smb/client/sess.c
@@ -0,0 +1,2028 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *
+ *   SMB/CIFS session setup handling routines
+ *
+ *   Copyright (c) International Business Machines  Corp., 2006, 2009
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ */
+
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_unicode.h"
+#include "cifs_debug.h"
+#include "ntlmssp.h"
+#include "nterr.h"
+#include <linux/utsname.h>
+#include <linux/slab.h>
+#include <linux/version.h>
+#include "cifsfs.h"
+#include "cifs_spnego.h"
+#include "smb2proto.h"
+#include "fs_context.h"
+
+static int
+cifs_ses_add_channel(struct cifs_ses *ses,
+		     struct cifs_server_iface *iface);
+
+bool
+is_server_using_iface(struct TCP_Server_Info *server,
+		      struct cifs_server_iface *iface)
+{
+	struct sockaddr_in *i4 = (struct sockaddr_in *)&iface->sockaddr;
+	struct sockaddr_in6 *i6 = (struct sockaddr_in6 *)&iface->sockaddr;
+	struct sockaddr_in *s4 = (struct sockaddr_in *)&server->dstaddr;
+	struct sockaddr_in6 *s6 = (struct sockaddr_in6 *)&server->dstaddr;
+
+	if (server->dstaddr.ss_family != iface->sockaddr.ss_family)
+		return false;
+	if (server->dstaddr.ss_family == AF_INET) {
+		if (s4->sin_addr.s_addr != i4->sin_addr.s_addr)
+			return false;
+	} else if (server->dstaddr.ss_family == AF_INET6) {
+		if (memcmp(&s6->sin6_addr, &i6->sin6_addr,
+			   sizeof(i6->sin6_addr)) != 0)
+			return false;
+	} else {
+		/* unknown family.. */
+		return false;
+	}
+	return true;
+}
+
+bool is_ses_using_iface(struct cifs_ses *ses, struct cifs_server_iface *iface)
+{
+	int i;
+
+	spin_lock(&ses->chan_lock);
+	for (i = 0; i < ses->chan_count; i++) {
+		if (ses->chans[i].iface == iface) {
+			spin_unlock(&ses->chan_lock);
+			return true;
+		}
+	}
+	spin_unlock(&ses->chan_lock);
+	return false;
+}
+
+/* channel helper functions. assumed that chan_lock is held by caller. */
+
+int
+cifs_ses_get_chan_index(struct cifs_ses *ses,
+			struct TCP_Server_Info *server)
+{
+	unsigned int i;
+
+	for (i = 0; i < ses->chan_count; i++) {
+		if (ses->chans[i].server == server)
+			return i;
+	}
+
+	/* If we didn't find the channel, it is likely a bug */
+	if (server)
+		cifs_dbg(VFS, "unable to get chan index for server: 0x%llx",
+			 server->conn_id);
+	WARN_ON(1);
+	return CIFS_INVAL_CHAN_INDEX;
+}
+
+void
+cifs_chan_set_in_reconnect(struct cifs_ses *ses,
+			     struct TCP_Server_Info *server)
+{
+	int chan_index = cifs_ses_get_chan_index(ses, server);
+
+	if (chan_index == CIFS_INVAL_CHAN_INDEX)
+		return;
+
+	ses->chans[chan_index].in_reconnect = true;
+}
+
+void
+cifs_chan_clear_in_reconnect(struct cifs_ses *ses,
+			     struct TCP_Server_Info *server)
+{
+	unsigned int chan_index = cifs_ses_get_chan_index(ses, server);
+	if (chan_index == CIFS_INVAL_CHAN_INDEX)
+		return;
+
+	ses->chans[chan_index].in_reconnect = false;
+}
+
+bool
+cifs_chan_in_reconnect(struct cifs_ses *ses,
+			  struct TCP_Server_Info *server)
+{
+	unsigned int chan_index = cifs_ses_get_chan_index(ses, server);
+	if (chan_index == CIFS_INVAL_CHAN_INDEX)
+		return true;	/* err on the safer side */
+
+	return CIFS_CHAN_IN_RECONNECT(ses, chan_index);
+}
+
+void
+cifs_chan_set_need_reconnect(struct cifs_ses *ses,
+			     struct TCP_Server_Info *server)
+{
+	unsigned int chan_index = cifs_ses_get_chan_index(ses, server);
+	if (chan_index == CIFS_INVAL_CHAN_INDEX)
+		return;
+
+	set_bit(chan_index, &ses->chans_need_reconnect);
+	cifs_dbg(FYI, "Set reconnect bitmask for chan %u; now 0x%lx\n",
+		 chan_index, ses->chans_need_reconnect);
+}
+
+void
+cifs_chan_clear_need_reconnect(struct cifs_ses *ses,
+			       struct TCP_Server_Info *server)
+{
+	unsigned int chan_index = cifs_ses_get_chan_index(ses, server);
+	if (chan_index == CIFS_INVAL_CHAN_INDEX)
+		return;
+
+	clear_bit(chan_index, &ses->chans_need_reconnect);
+	cifs_dbg(FYI, "Cleared reconnect bitmask for chan %u; now 0x%lx\n",
+		 chan_index, ses->chans_need_reconnect);
+}
+
+bool
+cifs_chan_needs_reconnect(struct cifs_ses *ses,
+			  struct TCP_Server_Info *server)
+{
+	unsigned int chan_index = cifs_ses_get_chan_index(ses, server);
+	if (chan_index == CIFS_INVAL_CHAN_INDEX)
+		return true;	/* err on the safer side */
+
+	return CIFS_CHAN_NEEDS_RECONNECT(ses, chan_index);
+}
+
+bool
+cifs_chan_is_iface_active(struct cifs_ses *ses,
+			  struct TCP_Server_Info *server)
+{
+	unsigned int chan_index = cifs_ses_get_chan_index(ses, server);
+	if (chan_index == CIFS_INVAL_CHAN_INDEX)
+		return true;	/* err on the safer side */
+
+	return ses->chans[chan_index].iface &&
+		ses->chans[chan_index].iface->is_active;
+}
+
+/* returns number of channels added */
+int cifs_try_adding_channels(struct cifs_ses *ses)
+{
+	struct TCP_Server_Info *server = ses->server;
+	int old_chan_count, new_chan_count;
+	int left;
+	int rc = 0;
+	int tries = 0;
+	size_t iface_weight = 0, iface_min_speed = 0;
+	struct cifs_server_iface *iface = NULL, *niface = NULL;
+	struct cifs_server_iface *last_iface = NULL;
+
+	spin_lock(&ses->chan_lock);
+
+	new_chan_count = old_chan_count = ses->chan_count;
+	left = ses->chan_max - ses->chan_count;
+
+	if (left <= 0) {
+		spin_unlock(&ses->chan_lock);
+		cifs_dbg(FYI,
+			 "ses already at max_channels (%zu), nothing to open\n",
+			 ses->chan_max);
+		return 0;
+	}
+
+	if (server->dialect < SMB30_PROT_ID) {
+		spin_unlock(&ses->chan_lock);
+		cifs_dbg(VFS, "multichannel is not supported on this protocol version, use 3.0 or above\n");
+		return 0;
+	}
+
+	if (!(server->capabilities & SMB2_GLOBAL_CAP_MULTI_CHANNEL)) {
+		spin_unlock(&ses->chan_lock);
+		cifs_server_dbg(VFS, "no multichannel support\n");
+		return 0;
+	}
+	spin_unlock(&ses->chan_lock);
+
+	while (left > 0) {
+
+		tries++;
+		if (tries > 3*ses->chan_max) {
+			cifs_dbg(VFS, "too many channel open attempts (%d channels left to open)\n",
+				 left);
+			break;
+		}
+
+		spin_lock(&ses->iface_lock);
+		if (!ses->iface_count) {
+			spin_unlock(&ses->iface_lock);
+			cifs_dbg(VFS, "server %s does not advertise interfaces\n",
+				      ses->server->hostname);
+			break;
+		}
+
+		if (!iface)
+			iface = list_first_entry(&ses->iface_list, struct cifs_server_iface,
+						 iface_head);
+		last_iface = list_last_entry(&ses->iface_list, struct cifs_server_iface,
+					     iface_head);
+		iface_min_speed = last_iface->speed;
+
+		list_for_each_entry_safe_from(iface, niface, &ses->iface_list,
+				    iface_head) {
+			/* do not mix rdma and non-rdma interfaces */
+			if (iface->rdma_capable != ses->server->rdma)
+				continue;
+
+			/* skip ifaces that are unusable */
+			if (!iface->is_active ||
+			    (is_ses_using_iface(ses, iface) &&
+			     !iface->rss_capable))
+				continue;
+
+			/* check if we already allocated enough channels */
+			iface_weight = iface->speed / iface_min_speed;
+
+			if (iface->weight_fulfilled >= iface_weight)
+				continue;
+
+			/* take ref before unlock */
+			kref_get(&iface->refcount);
+
+			spin_unlock(&ses->iface_lock);
+			rc = cifs_ses_add_channel(ses, iface);
+			spin_lock(&ses->iface_lock);
+
+			if (rc) {
+				cifs_dbg(VFS, "failed to open extra channel on iface:%pIS rc=%d\n",
+					 &iface->sockaddr,
+					 rc);
+				kref_put(&iface->refcount, release_iface);
+				continue;
+			}
+
+			iface->num_channels++;
+			iface->weight_fulfilled++;
+			cifs_dbg(VFS, "successfully opened new channel on iface:%pIS\n",
+				 &iface->sockaddr);
+			break;
+		}
+
+		/* reached end of list. reset weight_fulfilled and start over */
+		if (list_entry_is_head(iface, &ses->iface_list, iface_head)) {
+			list_for_each_entry(iface, &ses->iface_list, iface_head)
+				iface->weight_fulfilled = 0;
+			spin_unlock(&ses->iface_lock);
+			iface = NULL;
+			continue;
+		}
+		spin_unlock(&ses->iface_lock);
+
+		left--;
+		new_chan_count++;
+	}
+
+	return new_chan_count - old_chan_count;
+}
+
+/*
+ * called when multichannel is disabled by the server.
+ * this always gets called from smb2_reconnect
+ * and cannot get called in parallel threads.
+ */
+void
+cifs_disable_secondary_channels(struct cifs_ses *ses)
+{
+	int i, chan_count;
+	struct TCP_Server_Info *server;
+	struct cifs_server_iface *iface;
+
+	spin_lock(&ses->chan_lock);
+	chan_count = ses->chan_count;
+	if (chan_count == 1)
+		goto done;
+
+	ses->chan_count = 1;
+
+	/* for all secondary channels reset the need reconnect bit */
+	ses->chans_need_reconnect &= 1;
+
+	for (i = 1; i < chan_count; i++) {
+		iface = ses->chans[i].iface;
+		server = ses->chans[i].server;
+
+		/*
+		 * remove these references first, since we need to unlock
+		 * the chan_lock here, since iface_lock is a higher lock
+		 */
+		ses->chans[i].iface = NULL;
+		ses->chans[i].server = NULL;
+		spin_unlock(&ses->chan_lock);
+
+		if (iface) {
+			spin_lock(&ses->iface_lock);
+			kref_put(&iface->refcount, release_iface);
+			iface->num_channels--;
+			if (iface->weight_fulfilled)
+				iface->weight_fulfilled--;
+			spin_unlock(&ses->iface_lock);
+		}
+
+		if (server) {
+			if (!server->terminate) {
+				server->terminate = true;
+				cifs_signal_cifsd_for_reconnect(server, false);
+			}
+			cifs_put_tcp_session(server, false);
+		}
+
+		spin_lock(&ses->chan_lock);
+	}
+
+done:
+	spin_unlock(&ses->chan_lock);
+}
+
+/*
+ * update the iface for the channel if necessary.
+ * will return 0 when iface is updated, 1 if removed, 2 otherwise
+ * Must be called with chan_lock held.
+ */
+int
+cifs_chan_update_iface(struct cifs_ses *ses, struct TCP_Server_Info *server)
+{
+	unsigned int chan_index;
+	size_t iface_weight = 0, iface_min_speed = 0;
+	struct cifs_server_iface *iface = NULL;
+	struct cifs_server_iface *old_iface = NULL;
+	struct cifs_server_iface *last_iface = NULL;
+	struct sockaddr_storage ss;
+	int rc = 0;
+
+	spin_lock(&ses->chan_lock);
+	chan_index = cifs_ses_get_chan_index(ses, server);
+	if (chan_index == CIFS_INVAL_CHAN_INDEX) {
+		spin_unlock(&ses->chan_lock);
+		return 0;
+	}
+
+	if (ses->chans[chan_index].iface) {
+		old_iface = ses->chans[chan_index].iface;
+		if (old_iface->is_active) {
+			spin_unlock(&ses->chan_lock);
+			return 1;
+		}
+	}
+	spin_unlock(&ses->chan_lock);
+
+	spin_lock(&server->srv_lock);
+	ss = server->dstaddr;
+	spin_unlock(&server->srv_lock);
+
+	spin_lock(&ses->iface_lock);
+	if (!ses->iface_count) {
+		spin_unlock(&ses->iface_lock);
+		cifs_dbg(VFS, "server %s does not advertise interfaces\n", ses->server->hostname);
+		return 0;
+	}
+
+	last_iface = list_last_entry(&ses->iface_list, struct cifs_server_iface,
+				     iface_head);
+	iface_min_speed = last_iface->speed;
+
+	/* then look for a new one */
+	list_for_each_entry(iface, &ses->iface_list, iface_head) {
+		if (!chan_index) {
+			/* if we're trying to get the updated iface for primary channel */
+			if (!cifs_match_ipaddr((struct sockaddr *) &ss,
+					       (struct sockaddr *) &iface->sockaddr))
+				continue;
+
+			kref_get(&iface->refcount);
+			break;
+		}
+
+		/* do not mix rdma and non-rdma interfaces */
+		if (iface->rdma_capable != server->rdma)
+			continue;
+
+		if (!iface->is_active ||
+		    (is_ses_using_iface(ses, iface) &&
+		     !iface->rss_capable)) {
+			continue;
+		}
+
+		/* check if we already allocated enough channels */
+		iface_weight = iface->speed / iface_min_speed;
+
+		if (iface->weight_fulfilled >= iface_weight)
+			continue;
+
+		kref_get(&iface->refcount);
+		break;
+	}
+
+	if (list_entry_is_head(iface, &ses->iface_list, iface_head)) {
+		rc = 1;
+		iface = NULL;
+		cifs_dbg(FYI, "unable to find a suitable iface\n");
+	}
+
+	if (!chan_index && !iface) {
+		cifs_dbg(FYI, "unable to get the interface matching: %pIS\n",
+			 &ss);
+		spin_unlock(&ses->iface_lock);
+		return 0;
+	}
+
+	/* now drop the ref to the current iface */
+	if (old_iface && iface) {
+		cifs_dbg(FYI, "replacing iface: %pIS with %pIS\n",
+			 &old_iface->sockaddr,
+			 &iface->sockaddr);
+
+		old_iface->num_channels--;
+		if (old_iface->weight_fulfilled)
+			old_iface->weight_fulfilled--;
+		iface->num_channels++;
+		iface->weight_fulfilled++;
+
+		kref_put(&old_iface->refcount, release_iface);
+	} else if (old_iface) {
+		cifs_dbg(FYI, "releasing ref to iface: %pIS\n",
+			 &old_iface->sockaddr);
+
+		old_iface->num_channels--;
+		if (old_iface->weight_fulfilled)
+			old_iface->weight_fulfilled--;
+
+		kref_put(&old_iface->refcount, release_iface);
+	} else if (!chan_index) {
+		/* special case: update interface for primary channel */
+		cifs_dbg(FYI, "referencing primary channel iface: %pIS\n",
+			 &iface->sockaddr);
+		iface->num_channels++;
+		iface->weight_fulfilled++;
+	} else {
+		WARN_ON(!iface);
+		cifs_dbg(FYI, "adding new iface: %pIS\n", &iface->sockaddr);
+	}
+	spin_unlock(&ses->iface_lock);
+
+	spin_lock(&ses->chan_lock);
+	chan_index = cifs_ses_get_chan_index(ses, server);
+	if (chan_index == CIFS_INVAL_CHAN_INDEX) {
+		spin_unlock(&ses->chan_lock);
+		return 0;
+	}
+
+	ses->chans[chan_index].iface = iface;
+
+	/* No iface is found. if secondary chan, drop connection */
+	if (!iface && SERVER_IS_CHAN(server))
+		ses->chans[chan_index].server = NULL;
+
+	spin_unlock(&ses->chan_lock);
+
+	if (!iface && SERVER_IS_CHAN(server))
+		cifs_put_tcp_session(server, false);
+
+	return rc;
+}
+
+/*
+ * If server is a channel of ses, return the corresponding enclosing
+ * cifs_chan otherwise return NULL.
+ */
+struct cifs_chan *
+cifs_ses_find_chan(struct cifs_ses *ses, struct TCP_Server_Info *server)
+{
+	int i;
+
+	spin_lock(&ses->chan_lock);
+	for (i = 0; i < ses->chan_count; i++) {
+		if (ses->chans[i].server == server) {
+			spin_unlock(&ses->chan_lock);
+			return &ses->chans[i];
+		}
+	}
+	spin_unlock(&ses->chan_lock);
+	return NULL;
+}
+
+static int
+cifs_ses_add_channel(struct cifs_ses *ses,
+		     struct cifs_server_iface *iface)
+{
+	struct TCP_Server_Info *chan_server;
+	struct cifs_chan *chan;
+	struct smb3_fs_context *ctx;
+	static const char unc_fmt[] = "\\%s\\foo";
+	struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
+	struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
+	size_t len;
+	int rc;
+	unsigned int xid = get_xid();
+
+	if (iface->sockaddr.ss_family == AF_INET)
+		cifs_dbg(FYI, "adding channel to ses %p (speed:%zu bps rdma:%s ip:%pI4)\n",
+			 ses, iface->speed, iface->rdma_capable ? "yes" : "no",
+			 &ipv4->sin_addr);
+	else
+		cifs_dbg(FYI, "adding channel to ses %p (speed:%zu bps rdma:%s ip:%pI6)\n",
+			 ses, iface->speed, iface->rdma_capable ? "yes" : "no",
+			 &ipv6->sin6_addr);
+
+	/*
+	 * Setup a ctx with mostly the same info as the existing
+	 * session and overwrite it with the requested iface data.
+	 *
+	 * We need to setup at least the fields used for negprot and
+	 * sesssetup.
+	 *
+	 * We only need the ctx here, so we can reuse memory from
+	 * the session and server without caring about memory
+	 * management.
+	 */
+	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+	if (!ctx) {
+		rc = -ENOMEM;
+		goto out_free_xid;
+	}
+
+	/* Always make new connection for now (TODO?) */
+	ctx->nosharesock = true;
+
+	/* Auth */
+	ctx->domainauto = ses->domainAuto;
+	ctx->domainname = ses->domainName;
+
+	/* no hostname for extra channels */
+	ctx->server_hostname = "";
+
+	ctx->username = ses->user_name;
+	ctx->password = ses->password;
+	ctx->sectype = ses->sectype;
+	ctx->sign = ses->sign;
+
+	/* UNC and paths */
+	/* XXX: Use ses->server->hostname? */
+	len = sizeof(unc_fmt) + SERVER_NAME_LEN_WITH_NULL;
+	ctx->UNC = kzalloc(len, GFP_KERNEL);
+	if (!ctx->UNC) {
+		rc = -ENOMEM;
+		goto out_free_ctx;
+	}
+	scnprintf(ctx->UNC, len, unc_fmt, ses->ip_addr);
+	ctx->prepath = "";
+
+	/* Reuse same version as master connection */
+	ctx->vals = ses->server->vals;
+	ctx->ops = ses->server->ops;
+
+	ctx->noblocksnd = ses->server->noblocksnd;
+	ctx->noautotune = ses->server->noautotune;
+	ctx->sockopt_tcp_nodelay = ses->server->tcp_nodelay;
+	ctx->echo_interval = ses->server->echo_interval / HZ;
+	ctx->max_credits = ses->server->max_credits;
+
+	/*
+	 * This will be used for encoding/decoding user/domain/pw
+	 * during sess setup auth.
+	 */
+	ctx->local_nls = ses->local_nls;
+
+	/* Use RDMA if possible */
+	ctx->rdma = iface->rdma_capable;
+	memcpy(&ctx->dstaddr, &iface->sockaddr, sizeof(ctx->dstaddr));
+
+	/* reuse master con client guid */
+	memcpy(&ctx->client_guid, ses->server->client_guid,
+	       sizeof(ctx->client_guid));
+	ctx->use_client_guid = true;
+
+	chan_server = cifs_get_tcp_session(ctx, ses->server);
+
+	spin_lock(&ses->chan_lock);
+	chan = &ses->chans[ses->chan_count];
+	chan->server = chan_server;
+	if (IS_ERR(chan->server)) {
+		rc = PTR_ERR(chan->server);
+		chan->server = NULL;
+		spin_unlock(&ses->chan_lock);
+		goto out;
+	}
+	chan->iface = iface;
+	ses->chan_count++;
+	atomic_set(&ses->chan_seq, 0);
+
+	/* Mark this channel as needing connect/setup */
+	cifs_chan_set_need_reconnect(ses, chan->server);
+
+	spin_unlock(&ses->chan_lock);
+
+	mutex_lock(&ses->session_mutex);
+	/*
+	 * We need to allocate the server crypto now as we will need
+	 * to sign packets before we generate the channel signing key
+	 * (we sign with the session key)
+	 */
+	rc = smb311_crypto_shash_allocate(chan->server);
+	if (rc) {
+		cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
+		mutex_unlock(&ses->session_mutex);
+		goto out;
+	}
+
+	rc = cifs_negotiate_protocol(xid, ses, chan->server);
+	if (!rc)
+		rc = cifs_setup_session(xid, ses, chan->server, ses->local_nls);
+
+	mutex_unlock(&ses->session_mutex);
+
+out:
+	if (rc && chan->server) {
+		cifs_put_tcp_session(chan->server, 0);
+
+		spin_lock(&ses->chan_lock);
+
+		/* we rely on all bits beyond chan_count to be clear */
+		cifs_chan_clear_need_reconnect(ses, chan->server);
+		ses->chan_count--;
+		/*
+		 * chan_count should never reach 0 as at least the primary
+		 * channel is always allocated
+		 */
+		WARN_ON(ses->chan_count < 1);
+		spin_unlock(&ses->chan_lock);
+	}
+
+	kfree(ctx->UNC);
+out_free_ctx:
+	kfree(ctx);
+out_free_xid:
+	free_xid(xid);
+	return rc;
+}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+static __u32 cifs_ssetup_hdr(struct cifs_ses *ses,
+			     struct TCP_Server_Info *server,
+			     SESSION_SETUP_ANDX *pSMB)
+{
+	__u32 capabilities = 0;
+
+	/* init fields common to all four types of SessSetup */
+	/* Note that offsets for first seven fields in req struct are same  */
+	/*	in CIFS Specs so does not matter which of 3 forms of struct */
+	/*	that we use in next few lines                               */
+	/* Note that header is initialized to zero in header_assemble */
+	pSMB->req.AndXCommand = 0xFF;
+	pSMB->req.MaxBufferSize = cpu_to_le16(min_t(u32,
+					CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4,
+					USHRT_MAX));
+	pSMB->req.MaxMpxCount = cpu_to_le16(server->maxReq);
+	pSMB->req.VcNumber = cpu_to_le16(1);
+
+	/* Now no need to set SMBFLG_CASELESS or obsolete CANONICAL PATH */
+
+	/* BB verify whether signing required on neg or just on auth frame
+	   (and NTLM case) */
+
+	capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
+			CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
+
+	if (server->sign)
+		pSMB->req.hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
+
+	if (ses->capabilities & CAP_UNICODE) {
+		pSMB->req.hdr.Flags2 |= SMBFLG2_UNICODE;
+		capabilities |= CAP_UNICODE;
+	}
+	if (ses->capabilities & CAP_STATUS32) {
+		pSMB->req.hdr.Flags2 |= SMBFLG2_ERR_STATUS;
+		capabilities |= CAP_STATUS32;
+	}
+	if (ses->capabilities & CAP_DFS) {
+		pSMB->req.hdr.Flags2 |= SMBFLG2_DFS;
+		capabilities |= CAP_DFS;
+	}
+	if (ses->capabilities & CAP_UNIX)
+		capabilities |= CAP_UNIX;
+
+	return capabilities;
+}
+
+static void
+unicode_oslm_strings(char **pbcc_area, const struct nls_table *nls_cp)
+{
+	char *bcc_ptr = *pbcc_area;
+	int bytes_ret = 0;
+
+	/* Copy OS version */
+	bytes_ret = cifs_strtoUTF16((__le16 *)bcc_ptr, "Linux version ", 32,
+				    nls_cp);
+	bcc_ptr += 2 * bytes_ret;
+	bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, init_utsname()->release,
+				    32, nls_cp);
+	bcc_ptr += 2 * bytes_ret;
+	bcc_ptr += 2; /* trailing null */
+
+	bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
+				    32, nls_cp);
+	bcc_ptr += 2 * bytes_ret;
+	bcc_ptr += 2; /* trailing null */
+
+	*pbcc_area = bcc_ptr;
+}
+
+static void unicode_domain_string(char **pbcc_area, struct cifs_ses *ses,
+				   const struct nls_table *nls_cp)
+{
+	char *bcc_ptr = *pbcc_area;
+	int bytes_ret = 0;
+
+	/* copy domain */
+	if (ses->domainName == NULL) {
+		/* Sending null domain better than using a bogus domain name (as
+		we did briefly in 2.6.18) since server will use its default */
+		*bcc_ptr = 0;
+		*(bcc_ptr+1) = 0;
+		bytes_ret = 0;
+	} else
+		bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, ses->domainName,
+					    CIFS_MAX_DOMAINNAME_LEN, nls_cp);
+	bcc_ptr += 2 * bytes_ret;
+	bcc_ptr += 2;  /* account for null terminator */
+
+	*pbcc_area = bcc_ptr;
+}
+
+static void unicode_ssetup_strings(char **pbcc_area, struct cifs_ses *ses,
+				   const struct nls_table *nls_cp)
+{
+	char *bcc_ptr = *pbcc_area;
+	int bytes_ret = 0;
+
+	/* BB FIXME add check that strings total less
+	than 335 or will need to send them as arrays */
+
+	/* copy user */
+	if (ses->user_name == NULL) {
+		/* null user mount */
+		*bcc_ptr = 0;
+		*(bcc_ptr+1) = 0;
+	} else {
+		bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, ses->user_name,
+					    CIFS_MAX_USERNAME_LEN, nls_cp);
+	}
+	bcc_ptr += 2 * bytes_ret;
+	bcc_ptr += 2; /* account for null termination */
+
+	unicode_domain_string(&bcc_ptr, ses, nls_cp);
+	unicode_oslm_strings(&bcc_ptr, nls_cp);
+
+	*pbcc_area = bcc_ptr;
+}
+
+static void ascii_ssetup_strings(char **pbcc_area, struct cifs_ses *ses,
+				 const struct nls_table *nls_cp)
+{
+	char *bcc_ptr = *pbcc_area;
+	int len;
+
+	/* copy user */
+	/* BB what about null user mounts - check that we do this BB */
+	/* copy user */
+	if (ses->user_name != NULL) {
+		len = strscpy(bcc_ptr, ses->user_name, CIFS_MAX_USERNAME_LEN);
+		if (WARN_ON_ONCE(len < 0))
+			len = CIFS_MAX_USERNAME_LEN - 1;
+		bcc_ptr += len;
+	}
+	/* else null user mount */
+	*bcc_ptr = 0;
+	bcc_ptr++; /* account for null termination */
+
+	/* copy domain */
+	if (ses->domainName != NULL) {
+		len = strscpy(bcc_ptr, ses->domainName, CIFS_MAX_DOMAINNAME_LEN);
+		if (WARN_ON_ONCE(len < 0))
+			len = CIFS_MAX_DOMAINNAME_LEN - 1;
+		bcc_ptr += len;
+	} /* else we will send a null domain name
+	     so the server will default to its own domain */
+	*bcc_ptr = 0;
+	bcc_ptr++;
+
+	/* BB check for overflow here */
+
+	strcpy(bcc_ptr, "Linux version ");
+	bcc_ptr += strlen("Linux version ");
+	strcpy(bcc_ptr, init_utsname()->release);
+	bcc_ptr += strlen(init_utsname()->release) + 1;
+
+	strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
+	bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
+
+	*pbcc_area = bcc_ptr;
+}
+
+static void
+decode_unicode_ssetup(char **pbcc_area, int bleft, struct cifs_ses *ses,
+		      const struct nls_table *nls_cp)
+{
+	int len;
+	char *data = *pbcc_area;
+
+	cifs_dbg(FYI, "bleft %d\n", bleft);
+
+	kfree(ses->serverOS);
+	ses->serverOS = cifs_strndup_from_utf16(data, bleft, true, nls_cp);
+	cifs_dbg(FYI, "serverOS=%s\n", ses->serverOS);
+	len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2;
+	data += len;
+	bleft -= len;
+	if (bleft <= 0)
+		return;
+
+	kfree(ses->serverNOS);
+	ses->serverNOS = cifs_strndup_from_utf16(data, bleft, true, nls_cp);
+	cifs_dbg(FYI, "serverNOS=%s\n", ses->serverNOS);
+	len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2;
+	data += len;
+	bleft -= len;
+	if (bleft <= 0)
+		return;
+
+	kfree(ses->serverDomain);
+	ses->serverDomain = cifs_strndup_from_utf16(data, bleft, true, nls_cp);
+	cifs_dbg(FYI, "serverDomain=%s\n", ses->serverDomain);
+
+	return;
+}
+
+static void decode_ascii_ssetup(char **pbcc_area, __u16 bleft,
+				struct cifs_ses *ses,
+				const struct nls_table *nls_cp)
+{
+	int len;
+	char *bcc_ptr = *pbcc_area;
+
+	cifs_dbg(FYI, "decode sessetup ascii. bleft %d\n", bleft);
+
+	len = strnlen(bcc_ptr, bleft);
+	if (len >= bleft)
+		return;
+
+	kfree(ses->serverOS);
+
+	ses->serverOS = kmalloc(len + 1, GFP_KERNEL);
+	if (ses->serverOS) {
+		memcpy(ses->serverOS, bcc_ptr, len);
+		ses->serverOS[len] = 0;
+		if (strncmp(ses->serverOS, "OS/2", 4) == 0)
+			cifs_dbg(FYI, "OS/2 server\n");
+	}
+
+	bcc_ptr += len + 1;
+	bleft -= len + 1;
+
+	len = strnlen(bcc_ptr, bleft);
+	if (len >= bleft)
+		return;
+
+	kfree(ses->serverNOS);
+
+	ses->serverNOS = kmalloc(len + 1, GFP_KERNEL);
+	if (ses->serverNOS) {
+		memcpy(ses->serverNOS, bcc_ptr, len);
+		ses->serverNOS[len] = 0;
+	}
+
+	bcc_ptr += len + 1;
+	bleft -= len + 1;
+
+	len = strnlen(bcc_ptr, bleft);
+	if (len > bleft)
+		return;
+
+	/* No domain field in LANMAN case. Domain is
+	   returned by old servers in the SMB negprot response */
+	/* BB For newer servers which do not support Unicode,
+	   but thus do return domain here we could add parsing
+	   for it later, but it is not very important */
+	cifs_dbg(FYI, "ascii: bytes left %d\n", bleft);
+}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
+
+int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len,
+				    struct cifs_ses *ses)
+{
+	unsigned int tioffset; /* challenge message target info area */
+	unsigned int tilen; /* challenge message target info area length  */
+	CHALLENGE_MESSAGE *pblob = (CHALLENGE_MESSAGE *)bcc_ptr;
+	__u32 server_flags;
+
+	if (blob_len < sizeof(CHALLENGE_MESSAGE)) {
+		cifs_dbg(VFS, "challenge blob len %d too small\n", blob_len);
+		return -EINVAL;
+	}
+
+	if (memcmp(pblob->Signature, "NTLMSSP", 8)) {
+		cifs_dbg(VFS, "blob signature incorrect %s\n",
+			 pblob->Signature);
+		return -EINVAL;
+	}
+	if (pblob->MessageType != NtLmChallenge) {
+		cifs_dbg(VFS, "Incorrect message type %d\n",
+			 pblob->MessageType);
+		return -EINVAL;
+	}
+
+	server_flags = le32_to_cpu(pblob->NegotiateFlags);
+	cifs_dbg(FYI, "%s: negotiate=0x%08x challenge=0x%08x\n", __func__,
+		 ses->ntlmssp->client_flags, server_flags);
+
+	if ((ses->ntlmssp->client_flags & (NTLMSSP_NEGOTIATE_SEAL | NTLMSSP_NEGOTIATE_SIGN)) &&
+	    (!(server_flags & NTLMSSP_NEGOTIATE_56) && !(server_flags & NTLMSSP_NEGOTIATE_128))) {
+		cifs_dbg(VFS, "%s: requested signing/encryption but server did not return either 56-bit or 128-bit session key size\n",
+			 __func__);
+		return -EINVAL;
+	}
+	if (!(server_flags & NTLMSSP_NEGOTIATE_NTLM) && !(server_flags & NTLMSSP_NEGOTIATE_EXTENDED_SEC)) {
+		cifs_dbg(VFS, "%s: server does not seem to support either NTLMv1 or NTLMv2\n", __func__);
+		return -EINVAL;
+	}
+	if (ses->server->sign && !(server_flags & NTLMSSP_NEGOTIATE_SIGN)) {
+		cifs_dbg(VFS, "%s: forced packet signing but server does not seem to support it\n",
+			 __func__);
+		return -EOPNOTSUPP;
+	}
+	if ((ses->ntlmssp->client_flags & NTLMSSP_NEGOTIATE_KEY_XCH) &&
+	    !(server_flags & NTLMSSP_NEGOTIATE_KEY_XCH))
+		pr_warn_once("%s: authentication has been weakened as server does not support key exchange\n",
+			     __func__);
+
+	ses->ntlmssp->server_flags = server_flags;
+
+	memcpy(ses->ntlmssp->cryptkey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE);
+	/* In particular we can examine sign flags */
+	/* BB spec says that if AvId field of MsvAvTimestamp is populated then
+		we must set the MIC field of the AUTHENTICATE_MESSAGE */
+
+	tioffset = le32_to_cpu(pblob->TargetInfoArray.BufferOffset);
+	tilen = le16_to_cpu(pblob->TargetInfoArray.Length);
+	if (tioffset > blob_len || tioffset + tilen > blob_len) {
+		cifs_dbg(VFS, "tioffset + tilen too high %u + %u\n",
+			 tioffset, tilen);
+		return -EINVAL;
+	}
+	if (tilen) {
+		kfree_sensitive(ses->auth_key.response);
+		ses->auth_key.response = kmemdup(bcc_ptr + tioffset, tilen,
+						 GFP_KERNEL);
+		if (!ses->auth_key.response) {
+			cifs_dbg(VFS, "Challenge target info alloc failure\n");
+			return -ENOMEM;
+		}
+		ses->auth_key.len = tilen;
+	}
+
+	return 0;
+}
+
+static int size_of_ntlmssp_blob(struct cifs_ses *ses, int base_size)
+{
+	int sz = base_size + ses->auth_key.len
+		- CIFS_SESS_KEY_SIZE + CIFS_CPHTXT_SIZE + 2;
+
+	if (ses->domainName)
+		sz += sizeof(__le16) * strnlen(ses->domainName, CIFS_MAX_DOMAINNAME_LEN);
+	else
+		sz += sizeof(__le16);
+
+	if (ses->user_name)
+		sz += sizeof(__le16) * strnlen(ses->user_name, CIFS_MAX_USERNAME_LEN);
+	else
+		sz += sizeof(__le16);
+
+	if (ses->workstation_name[0])
+		sz += sizeof(__le16) * strnlen(ses->workstation_name,
+					       ntlmssp_workstation_name_size(ses));
+	else
+		sz += sizeof(__le16);
+
+	return sz;
+}
+
+static inline void cifs_security_buffer_from_str(SECURITY_BUFFER *pbuf,
+						 char *str_value,
+						 int str_length,
+						 unsigned char *pstart,
+						 unsigned char **pcur,
+						 const struct nls_table *nls_cp)
+{
+	unsigned char *tmp = pstart;
+	int len;
+
+	if (!pbuf)
+		return;
+
+	if (!pcur)
+		pcur = &tmp;
+
+	if (!str_value) {
+		pbuf->BufferOffset = cpu_to_le32(*pcur - pstart);
+		pbuf->Length = 0;
+		pbuf->MaximumLength = 0;
+		*pcur += sizeof(__le16);
+	} else {
+		len = cifs_strtoUTF16((__le16 *)*pcur,
+				      str_value,
+				      str_length,
+				      nls_cp);
+		len *= sizeof(__le16);
+		pbuf->BufferOffset = cpu_to_le32(*pcur - pstart);
+		pbuf->Length = cpu_to_le16(len);
+		pbuf->MaximumLength = cpu_to_le16(len);
+		*pcur += len;
+	}
+}
+
+/* BB Move to ntlmssp.c eventually */
+
+int build_ntlmssp_negotiate_blob(unsigned char **pbuffer,
+				 u16 *buflen,
+				 struct cifs_ses *ses,
+				 struct TCP_Server_Info *server,
+				 const struct nls_table *nls_cp)
+{
+	int rc = 0;
+	NEGOTIATE_MESSAGE *sec_blob;
+	__u32 flags;
+	unsigned char *tmp;
+	int len;
+
+	len = size_of_ntlmssp_blob(ses, sizeof(NEGOTIATE_MESSAGE));
+	*pbuffer = kmalloc(len, GFP_KERNEL);
+	if (!*pbuffer) {
+		rc = -ENOMEM;
+		cifs_dbg(VFS, "Error %d during NTLMSSP allocation\n", rc);
+		*buflen = 0;
+		goto setup_ntlm_neg_ret;
+	}
+	sec_blob = (NEGOTIATE_MESSAGE *)*pbuffer;
+
+	memset(*pbuffer, 0, sizeof(NEGOTIATE_MESSAGE));
+	memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
+	sec_blob->MessageType = NtLmNegotiate;
+
+	/* BB is NTLMV2 session security format easier to use here? */
+	flags = NTLMSSP_NEGOTIATE_56 |	NTLMSSP_REQUEST_TARGET |
+		NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
+		NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC |
+		NTLMSSP_NEGOTIATE_ALWAYS_SIGN | NTLMSSP_NEGOTIATE_SEAL |
+		NTLMSSP_NEGOTIATE_SIGN;
+	if (!server->session_estab || ses->ntlmssp->sesskey_per_smbsess)
+		flags |= NTLMSSP_NEGOTIATE_KEY_XCH;
+
+	tmp = *pbuffer + sizeof(NEGOTIATE_MESSAGE);
+	ses->ntlmssp->client_flags = flags;
+	sec_blob->NegotiateFlags = cpu_to_le32(flags);
+
+	/* these fields should be null in negotiate phase MS-NLMP 3.1.5.1.1 */
+	cifs_security_buffer_from_str(&sec_blob->DomainName,
+				      NULL,
+				      CIFS_MAX_DOMAINNAME_LEN,
+				      *pbuffer, &tmp,
+				      nls_cp);
+
+	cifs_security_buffer_from_str(&sec_blob->WorkstationName,
+				      NULL,
+				      CIFS_MAX_WORKSTATION_LEN,
+				      *pbuffer, &tmp,
+				      nls_cp);
+
+	*buflen = tmp - *pbuffer;
+setup_ntlm_neg_ret:
+	return rc;
+}
+
+/*
+ * Build ntlmssp blob with additional fields, such as version,
+ * supported by modern servers. For safety limit to SMB3 or later
+ * See notes in MS-NLMP Section 2.2.2.1 e.g.
+ */
+int build_ntlmssp_smb3_negotiate_blob(unsigned char **pbuffer,
+				 u16 *buflen,
+				 struct cifs_ses *ses,
+				 struct TCP_Server_Info *server,
+				 const struct nls_table *nls_cp)
+{
+	int rc = 0;
+	struct negotiate_message *sec_blob;
+	__u32 flags;
+	unsigned char *tmp;
+	int len;
+
+	len = size_of_ntlmssp_blob(ses, sizeof(struct negotiate_message));
+	*pbuffer = kmalloc(len, GFP_KERNEL);
+	if (!*pbuffer) {
+		rc = -ENOMEM;
+		cifs_dbg(VFS, "Error %d during NTLMSSP allocation\n", rc);
+		*buflen = 0;
+		goto setup_ntlm_smb3_neg_ret;
+	}
+	sec_blob = (struct negotiate_message *)*pbuffer;
+
+	memset(*pbuffer, 0, sizeof(struct negotiate_message));
+	memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
+	sec_blob->MessageType = NtLmNegotiate;
+
+	/* BB is NTLMV2 session security format easier to use here? */
+	flags = NTLMSSP_NEGOTIATE_56 |	NTLMSSP_REQUEST_TARGET |
+		NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
+		NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC |
+		NTLMSSP_NEGOTIATE_ALWAYS_SIGN | NTLMSSP_NEGOTIATE_SEAL |
+		NTLMSSP_NEGOTIATE_SIGN | NTLMSSP_NEGOTIATE_VERSION;
+	if (!server->session_estab || ses->ntlmssp->sesskey_per_smbsess)
+		flags |= NTLMSSP_NEGOTIATE_KEY_XCH;
+
+	sec_blob->Version.ProductMajorVersion = LINUX_VERSION_MAJOR;
+	sec_blob->Version.ProductMinorVersion = LINUX_VERSION_PATCHLEVEL;
+	sec_blob->Version.ProductBuild = cpu_to_le16(SMB3_PRODUCT_BUILD);
+	sec_blob->Version.NTLMRevisionCurrent = NTLMSSP_REVISION_W2K3;
+
+	tmp = *pbuffer + sizeof(struct negotiate_message);
+	ses->ntlmssp->client_flags = flags;
+	sec_blob->NegotiateFlags = cpu_to_le32(flags);
+
+	/* these fields should be null in negotiate phase MS-NLMP 3.1.5.1.1 */
+	cifs_security_buffer_from_str(&sec_blob->DomainName,
+				      NULL,
+				      CIFS_MAX_DOMAINNAME_LEN,
+				      *pbuffer, &tmp,
+				      nls_cp);
+
+	cifs_security_buffer_from_str(&sec_blob->WorkstationName,
+				      NULL,
+				      CIFS_MAX_WORKSTATION_LEN,
+				      *pbuffer, &tmp,
+				      nls_cp);
+
+	*buflen = tmp - *pbuffer;
+setup_ntlm_smb3_neg_ret:
+	return rc;
+}
+
+
+/* See MS-NLMP 2.2.1.3 */
+int build_ntlmssp_auth_blob(unsigned char **pbuffer,
+					u16 *buflen,
+				   struct cifs_ses *ses,
+				   struct TCP_Server_Info *server,
+				   const struct nls_table *nls_cp)
+{
+	int rc;
+	AUTHENTICATE_MESSAGE *sec_blob;
+	__u32 flags;
+	unsigned char *tmp;
+	int len;
+
+	rc = setup_ntlmv2_rsp(ses, nls_cp);
+	if (rc) {
+		cifs_dbg(VFS, "Error %d during NTLMSSP authentication\n", rc);
+		*buflen = 0;
+		goto setup_ntlmv2_ret;
+	}
+
+	len = size_of_ntlmssp_blob(ses, sizeof(AUTHENTICATE_MESSAGE));
+	*pbuffer = kmalloc(len, GFP_KERNEL);
+	if (!*pbuffer) {
+		rc = -ENOMEM;
+		cifs_dbg(VFS, "Error %d during NTLMSSP allocation\n", rc);
+		*buflen = 0;
+		goto setup_ntlmv2_ret;
+	}
+	sec_blob = (AUTHENTICATE_MESSAGE *)*pbuffer;
+
+	memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
+	sec_blob->MessageType = NtLmAuthenticate;
+
+	flags = ses->ntlmssp->server_flags | NTLMSSP_REQUEST_TARGET |
+		NTLMSSP_NEGOTIATE_TARGET_INFO | NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED;
+	/* we only send version information in ntlmssp negotiate, so do not set this flag */
+	flags = flags & ~NTLMSSP_NEGOTIATE_VERSION;
+	tmp = *pbuffer + sizeof(AUTHENTICATE_MESSAGE);
+	sec_blob->NegotiateFlags = cpu_to_le32(flags);
+
+	sec_blob->LmChallengeResponse.BufferOffset =
+				cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE));
+	sec_blob->LmChallengeResponse.Length = 0;
+	sec_blob->LmChallengeResponse.MaximumLength = 0;
+
+	sec_blob->NtChallengeResponse.BufferOffset =
+				cpu_to_le32(tmp - *pbuffer);
+	if (ses->user_name != NULL) {
+		memcpy(tmp, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
+				ses->auth_key.len - CIFS_SESS_KEY_SIZE);
+		tmp += ses->auth_key.len - CIFS_SESS_KEY_SIZE;
+
+		sec_blob->NtChallengeResponse.Length =
+				cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE);
+		sec_blob->NtChallengeResponse.MaximumLength =
+				cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE);
+	} else {
+		/*
+		 * don't send an NT Response for anonymous access
+		 */
+		sec_blob->NtChallengeResponse.Length = 0;
+		sec_blob->NtChallengeResponse.MaximumLength = 0;
+	}
+
+	cifs_security_buffer_from_str(&sec_blob->DomainName,
+				      ses->domainName,
+				      CIFS_MAX_DOMAINNAME_LEN,
+				      *pbuffer, &tmp,
+				      nls_cp);
+
+	cifs_security_buffer_from_str(&sec_blob->UserName,
+				      ses->user_name,
+				      CIFS_MAX_USERNAME_LEN,
+				      *pbuffer, &tmp,
+				      nls_cp);
+
+	cifs_security_buffer_from_str(&sec_blob->WorkstationName,
+				      ses->workstation_name,
+				      ntlmssp_workstation_name_size(ses),
+				      *pbuffer, &tmp,
+				      nls_cp);
+
+	if ((ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_KEY_XCH) &&
+	    (!ses->server->session_estab || ses->ntlmssp->sesskey_per_smbsess) &&
+	    !calc_seckey(ses)) {
+		memcpy(tmp, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE);
+		sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer);
+		sec_blob->SessionKey.Length = cpu_to_le16(CIFS_CPHTXT_SIZE);
+		sec_blob->SessionKey.MaximumLength =
+				cpu_to_le16(CIFS_CPHTXT_SIZE);
+		tmp += CIFS_CPHTXT_SIZE;
+	} else {
+		sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer);
+		sec_blob->SessionKey.Length = 0;
+		sec_blob->SessionKey.MaximumLength = 0;
+	}
+
+	*buflen = tmp - *pbuffer;
+setup_ntlmv2_ret:
+	return rc;
+}
+
+enum securityEnum
+cifs_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
+{
+	switch (server->negflavor) {
+	case CIFS_NEGFLAVOR_EXTENDED:
+		switch (requested) {
+		case Kerberos:
+		case RawNTLMSSP:
+			return requested;
+		case Unspecified:
+			if (server->sec_ntlmssp &&
+			    (global_secflags & CIFSSEC_MAY_NTLMSSP))
+				return RawNTLMSSP;
+			if ((server->sec_kerberos || server->sec_mskerberos) &&
+			    (global_secflags & CIFSSEC_MAY_KRB5))
+				return Kerberos;
+			fallthrough;
+		default:
+			return Unspecified;
+		}
+	case CIFS_NEGFLAVOR_UNENCAP:
+		switch (requested) {
+		case NTLMv2:
+			return requested;
+		case Unspecified:
+			if (global_secflags & CIFSSEC_MAY_NTLMV2)
+				return NTLMv2;
+			break;
+		default:
+			break;
+		}
+		fallthrough;
+	default:
+		return Unspecified;
+	}
+}
+
+struct sess_data {
+	unsigned int xid;
+	struct cifs_ses *ses;
+	struct TCP_Server_Info *server;
+	struct nls_table *nls_cp;
+	void (*func)(struct sess_data *);
+	int result;
+
+	/* we will send the SMB in three pieces:
+	 * a fixed length beginning part, an optional
+	 * SPNEGO blob (which can be zero length), and a
+	 * last part which will include the strings
+	 * and rest of bcc area. This allows us to avoid
+	 * a large buffer 17K allocation
+	 */
+	int buf0_type;
+	struct kvec iov[3];
+};
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+static int
+sess_alloc_buffer(struct sess_data *sess_data, int wct)
+{
+	int rc;
+	struct cifs_ses *ses = sess_data->ses;
+	struct smb_hdr *smb_buf;
+
+	rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses,
+				  (void **)&smb_buf);
+
+	if (rc)
+		return rc;
+
+	sess_data->iov[0].iov_base = (char *)smb_buf;
+	sess_data->iov[0].iov_len = be32_to_cpu(smb_buf->smb_buf_length) + 4;
+	/*
+	 * This variable will be used to clear the buffer
+	 * allocated above in case of any error in the calling function.
+	 */
+	sess_data->buf0_type = CIFS_SMALL_BUFFER;
+
+	/* 2000 big enough to fit max user, domain, NOS name etc. */
+	sess_data->iov[2].iov_base = kmalloc(2000, GFP_KERNEL);
+	if (!sess_data->iov[2].iov_base) {
+		rc = -ENOMEM;
+		goto out_free_smb_buf;
+	}
+
+	return 0;
+
+out_free_smb_buf:
+	cifs_small_buf_release(smb_buf);
+	sess_data->iov[0].iov_base = NULL;
+	sess_data->iov[0].iov_len = 0;
+	sess_data->buf0_type = CIFS_NO_BUFFER;
+	return rc;
+}
+
+static void
+sess_free_buffer(struct sess_data *sess_data)
+{
+	struct kvec *iov = sess_data->iov;
+
+	/*
+	 * Zero the session data before freeing, as it might contain sensitive info (keys, etc).
+	 * Note that iov[1] is already freed by caller.
+	 */
+	if (sess_data->buf0_type != CIFS_NO_BUFFER && iov[0].iov_base)
+		memzero_explicit(iov[0].iov_base, iov[0].iov_len);
+
+	free_rsp_buf(sess_data->buf0_type, iov[0].iov_base);
+	sess_data->buf0_type = CIFS_NO_BUFFER;
+	kfree_sensitive(iov[2].iov_base);
+}
+
+static int
+sess_establish_session(struct sess_data *sess_data)
+{
+	struct cifs_ses *ses = sess_data->ses;
+	struct TCP_Server_Info *server = sess_data->server;
+
+	cifs_server_lock(server);
+	if (!server->session_estab) {
+		if (server->sign) {
+			server->session_key.response =
+				kmemdup(ses->auth_key.response,
+				ses->auth_key.len, GFP_KERNEL);
+			if (!server->session_key.response) {
+				cifs_server_unlock(server);
+				return -ENOMEM;
+			}
+			server->session_key.len =
+						ses->auth_key.len;
+		}
+		server->sequence_number = 0x2;
+		server->session_estab = true;
+	}
+	cifs_server_unlock(server);
+
+	cifs_dbg(FYI, "CIFS session established successfully\n");
+	return 0;
+}
+
+static int
+sess_sendreceive(struct sess_data *sess_data)
+{
+	int rc;
+	struct smb_hdr *smb_buf = (struct smb_hdr *) sess_data->iov[0].iov_base;
+	__u16 count;
+	struct kvec rsp_iov = { NULL, 0 };
+
+	count = sess_data->iov[1].iov_len + sess_data->iov[2].iov_len;
+	be32_add_cpu(&smb_buf->smb_buf_length, count);
+	put_bcc(count, smb_buf);
+
+	rc = SendReceive2(sess_data->xid, sess_data->ses,
+			  sess_data->iov, 3 /* num_iovecs */,
+			  &sess_data->buf0_type,
+			  CIFS_LOG_ERROR, &rsp_iov);
+	cifs_small_buf_release(sess_data->iov[0].iov_base);
+	memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
+
+	return rc;
+}
+
+static void
+sess_auth_ntlmv2(struct sess_data *sess_data)
+{
+	int rc = 0;
+	struct smb_hdr *smb_buf;
+	SESSION_SETUP_ANDX *pSMB;
+	char *bcc_ptr;
+	struct cifs_ses *ses = sess_data->ses;
+	struct TCP_Server_Info *server = sess_data->server;
+	__u32 capabilities;
+	__u16 bytes_remaining;
+
+	/* old style NTLM sessionsetup */
+	/* wct = 13 */
+	rc = sess_alloc_buffer(sess_data, 13);
+	if (rc)
+		goto out;
+
+	pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
+	bcc_ptr = sess_data->iov[2].iov_base;
+	capabilities = cifs_ssetup_hdr(ses, server, pSMB);
+
+	pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
+
+	/* LM2 password would be here if we supported it */
+	pSMB->req_no_secext.CaseInsensitivePasswordLength = 0;
+
+	if (ses->user_name != NULL) {
+		/* calculate nlmv2 response and session key */
+		rc = setup_ntlmv2_rsp(ses, sess_data->nls_cp);
+		if (rc) {
+			cifs_dbg(VFS, "Error %d during NTLMv2 authentication\n", rc);
+			goto out;
+		}
+
+		memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
+				ses->auth_key.len - CIFS_SESS_KEY_SIZE);
+		bcc_ptr += ses->auth_key.len - CIFS_SESS_KEY_SIZE;
+
+		/* set case sensitive password length after tilen may get
+		 * assigned, tilen is 0 otherwise.
+		 */
+		pSMB->req_no_secext.CaseSensitivePasswordLength =
+			cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE);
+	} else {
+		pSMB->req_no_secext.CaseSensitivePasswordLength = 0;
+	}
+
+	if (ses->capabilities & CAP_UNICODE) {
+		if (!IS_ALIGNED(sess_data->iov[0].iov_len, 2)) {
+			*bcc_ptr = 0;
+			bcc_ptr++;
+		}
+		unicode_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp);
+	} else {
+		ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp);
+	}
+
+
+	sess_data->iov[2].iov_len = (long) bcc_ptr -
+			(long) sess_data->iov[2].iov_base;
+
+	rc = sess_sendreceive(sess_data);
+	if (rc)
+		goto out;
+
+	pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
+	smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base;
+
+	if (smb_buf->WordCount != 3) {
+		rc = -EIO;
+		cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount);
+		goto out;
+	}
+
+	if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN)
+		cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */
+
+	ses->Suid = smb_buf->Uid;   /* UID left in wire format (le) */
+	cifs_dbg(FYI, "UID = %llu\n", ses->Suid);
+
+	bytes_remaining = get_bcc(smb_buf);
+	bcc_ptr = pByteArea(smb_buf);
+
+	/* BB check if Unicode and decode strings */
+	if (bytes_remaining == 0) {
+		/* no string area to decode, do nothing */
+	} else if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
+		/* unicode string area must be word-aligned */
+		if (!IS_ALIGNED((unsigned long)bcc_ptr - (unsigned long)smb_buf, 2)) {
+			++bcc_ptr;
+			--bytes_remaining;
+		}
+		decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses,
+				      sess_data->nls_cp);
+	} else {
+		decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses,
+				    sess_data->nls_cp);
+	}
+
+	rc = sess_establish_session(sess_data);
+out:
+	sess_data->result = rc;
+	sess_data->func = NULL;
+	sess_free_buffer(sess_data);
+	kfree_sensitive(ses->auth_key.response);
+	ses->auth_key.response = NULL;
+}
+
+#ifdef CONFIG_CIFS_UPCALL
+static void
+sess_auth_kerberos(struct sess_data *sess_data)
+{
+	int rc = 0;
+	struct smb_hdr *smb_buf;
+	SESSION_SETUP_ANDX *pSMB;
+	char *bcc_ptr;
+	struct cifs_ses *ses = sess_data->ses;
+	struct TCP_Server_Info *server = sess_data->server;
+	__u32 capabilities;
+	__u16 bytes_remaining;
+	struct key *spnego_key = NULL;
+	struct cifs_spnego_msg *msg;
+	u16 blob_len;
+
+	/* extended security */
+	/* wct = 12 */
+	rc = sess_alloc_buffer(sess_data, 12);
+	if (rc)
+		goto out;
+
+	pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
+	bcc_ptr = sess_data->iov[2].iov_base;
+	capabilities = cifs_ssetup_hdr(ses, server, pSMB);
+
+	spnego_key = cifs_get_spnego_key(ses, server);
+	if (IS_ERR(spnego_key)) {
+		rc = PTR_ERR(spnego_key);
+		spnego_key = NULL;
+		goto out;
+	}
+
+	msg = spnego_key->payload.data[0];
+	/*
+	 * check version field to make sure that cifs.upcall is
+	 * sending us a response in an expected form
+	 */
+	if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
+		cifs_dbg(VFS, "incorrect version of cifs.upcall (expected %d but got %d)\n",
+			 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
+		rc = -EKEYREJECTED;
+		goto out_put_spnego_key;
+	}
+
+	kfree_sensitive(ses->auth_key.response);
+	ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
+					 GFP_KERNEL);
+	if (!ses->auth_key.response) {
+		cifs_dbg(VFS, "Kerberos can't allocate (%u bytes) memory\n",
+			 msg->sesskey_len);
+		rc = -ENOMEM;
+		goto out_put_spnego_key;
+	}
+	ses->auth_key.len = msg->sesskey_len;
+
+	pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
+	capabilities |= CAP_EXTENDED_SECURITY;
+	pSMB->req.Capabilities = cpu_to_le32(capabilities);
+	sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
+	sess_data->iov[1].iov_len = msg->secblob_len;
+	pSMB->req.SecurityBlobLength = cpu_to_le16(sess_data->iov[1].iov_len);
+
+	if (ses->capabilities & CAP_UNICODE) {
+		/* unicode strings must be word aligned */
+		if (!IS_ALIGNED(sess_data->iov[0].iov_len + sess_data->iov[1].iov_len, 2)) {
+			*bcc_ptr = 0;
+			bcc_ptr++;
+		}
+		unicode_oslm_strings(&bcc_ptr, sess_data->nls_cp);
+		unicode_domain_string(&bcc_ptr, ses, sess_data->nls_cp);
+	} else {
+		/* BB: is this right? */
+		ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp);
+	}
+
+	sess_data->iov[2].iov_len = (long) bcc_ptr -
+			(long) sess_data->iov[2].iov_base;
+
+	rc = sess_sendreceive(sess_data);
+	if (rc)
+		goto out_put_spnego_key;
+
+	pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
+	smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base;
+
+	if (smb_buf->WordCount != 4) {
+		rc = -EIO;
+		cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount);
+		goto out_put_spnego_key;
+	}
+
+	if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN)
+		cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */
+
+	ses->Suid = smb_buf->Uid;   /* UID left in wire format (le) */
+	cifs_dbg(FYI, "UID = %llu\n", ses->Suid);
+
+	bytes_remaining = get_bcc(smb_buf);
+	bcc_ptr = pByteArea(smb_buf);
+
+	blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
+	if (blob_len > bytes_remaining) {
+		cifs_dbg(VFS, "bad security blob length %d\n",
+				blob_len);
+		rc = -EINVAL;
+		goto out_put_spnego_key;
+	}
+	bcc_ptr += blob_len;
+	bytes_remaining -= blob_len;
+
+	/* BB check if Unicode and decode strings */
+	if (bytes_remaining == 0) {
+		/* no string area to decode, do nothing */
+	} else if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
+		/* unicode string area must be word-aligned */
+		if (!IS_ALIGNED((unsigned long)bcc_ptr - (unsigned long)smb_buf, 2)) {
+			++bcc_ptr;
+			--bytes_remaining;
+		}
+		decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses,
+				      sess_data->nls_cp);
+	} else {
+		decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses,
+				    sess_data->nls_cp);
+	}
+
+	rc = sess_establish_session(sess_data);
+out_put_spnego_key:
+	key_invalidate(spnego_key);
+	key_put(spnego_key);
+out:
+	sess_data->result = rc;
+	sess_data->func = NULL;
+	sess_free_buffer(sess_data);
+	kfree_sensitive(ses->auth_key.response);
+	ses->auth_key.response = NULL;
+}
+
+#endif /* ! CONFIG_CIFS_UPCALL */
+
+/*
+ * The required kvec buffers have to be allocated before calling this
+ * function.
+ */
+static int
+_sess_auth_rawntlmssp_assemble_req(struct sess_data *sess_data)
+{
+	SESSION_SETUP_ANDX *pSMB;
+	struct cifs_ses *ses = sess_data->ses;
+	struct TCP_Server_Info *server = sess_data->server;
+	__u32 capabilities;
+	char *bcc_ptr;
+
+	pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
+
+	capabilities = cifs_ssetup_hdr(ses, server, pSMB);
+	if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) {
+		cifs_dbg(VFS, "NTLMSSP requires Unicode support\n");
+		return -ENOSYS;
+	}
+
+	pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
+	capabilities |= CAP_EXTENDED_SECURITY;
+	pSMB->req.Capabilities |= cpu_to_le32(capabilities);
+
+	bcc_ptr = sess_data->iov[2].iov_base;
+	/* unicode strings must be word aligned */
+	if (!IS_ALIGNED(sess_data->iov[0].iov_len + sess_data->iov[1].iov_len, 2)) {
+		*bcc_ptr = 0;
+		bcc_ptr++;
+	}
+	unicode_oslm_strings(&bcc_ptr, sess_data->nls_cp);
+
+	sess_data->iov[2].iov_len = (long) bcc_ptr -
+					(long) sess_data->iov[2].iov_base;
+
+	return 0;
+}
+
+static void
+sess_auth_rawntlmssp_authenticate(struct sess_data *sess_data);
+
+static void
+sess_auth_rawntlmssp_negotiate(struct sess_data *sess_data)
+{
+	int rc;
+	struct smb_hdr *smb_buf;
+	SESSION_SETUP_ANDX *pSMB;
+	struct cifs_ses *ses = sess_data->ses;
+	struct TCP_Server_Info *server = sess_data->server;
+	__u16 bytes_remaining;
+	char *bcc_ptr;
+	unsigned char *ntlmsspblob = NULL;
+	u16 blob_len;
+
+	cifs_dbg(FYI, "rawntlmssp session setup negotiate phase\n");
+
+	/*
+	 * if memory allocation is successful, caller of this function
+	 * frees it.
+	 */
+	ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
+	if (!ses->ntlmssp) {
+		rc = -ENOMEM;
+		goto out;
+	}
+	ses->ntlmssp->sesskey_per_smbsess = false;
+
+	/* wct = 12 */
+	rc = sess_alloc_buffer(sess_data, 12);
+	if (rc)
+		goto out;
+
+	pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
+
+	/* Build security blob before we assemble the request */
+	rc = build_ntlmssp_negotiate_blob(&ntlmsspblob,
+				     &blob_len, ses, server,
+				     sess_data->nls_cp);
+	if (rc)
+		goto out_free_ntlmsspblob;
+
+	sess_data->iov[1].iov_len = blob_len;
+	sess_data->iov[1].iov_base = ntlmsspblob;
+	pSMB->req.SecurityBlobLength = cpu_to_le16(blob_len);
+
+	rc = _sess_auth_rawntlmssp_assemble_req(sess_data);
+	if (rc)
+		goto out_free_ntlmsspblob;
+
+	rc = sess_sendreceive(sess_data);
+
+	pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
+	smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base;
+
+	/* If true, rc here is expected and not an error */
+	if (sess_data->buf0_type != CIFS_NO_BUFFER &&
+	    smb_buf->Status.CifsError ==
+			cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
+		rc = 0;
+
+	if (rc)
+		goto out_free_ntlmsspblob;
+
+	cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
+
+	if (smb_buf->WordCount != 4) {
+		rc = -EIO;
+		cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount);
+		goto out_free_ntlmsspblob;
+	}
+
+	ses->Suid = smb_buf->Uid;   /* UID left in wire format (le) */
+	cifs_dbg(FYI, "UID = %llu\n", ses->Suid);
+
+	bytes_remaining = get_bcc(smb_buf);
+	bcc_ptr = pByteArea(smb_buf);
+
+	blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
+	if (blob_len > bytes_remaining) {
+		cifs_dbg(VFS, "bad security blob length %d\n",
+				blob_len);
+		rc = -EINVAL;
+		goto out_free_ntlmsspblob;
+	}
+
+	rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses);
+
+out_free_ntlmsspblob:
+	kfree_sensitive(ntlmsspblob);
+out:
+	sess_free_buffer(sess_data);
+
+	if (!rc) {
+		sess_data->func = sess_auth_rawntlmssp_authenticate;
+		return;
+	}
+
+	/* Else error. Cleanup */
+	kfree_sensitive(ses->auth_key.response);
+	ses->auth_key.response = NULL;
+	kfree_sensitive(ses->ntlmssp);
+	ses->ntlmssp = NULL;
+
+	sess_data->func = NULL;
+	sess_data->result = rc;
+}
+
+static void
+sess_auth_rawntlmssp_authenticate(struct sess_data *sess_data)
+{
+	int rc;
+	struct smb_hdr *smb_buf;
+	SESSION_SETUP_ANDX *pSMB;
+	struct cifs_ses *ses = sess_data->ses;
+	struct TCP_Server_Info *server = sess_data->server;
+	__u16 bytes_remaining;
+	char *bcc_ptr;
+	unsigned char *ntlmsspblob = NULL;
+	u16 blob_len;
+
+	cifs_dbg(FYI, "rawntlmssp session setup authenticate phase\n");
+
+	/* wct = 12 */
+	rc = sess_alloc_buffer(sess_data, 12);
+	if (rc)
+		goto out;
+
+	/* Build security blob before we assemble the request */
+	pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
+	smb_buf = (struct smb_hdr *)pSMB;
+	rc = build_ntlmssp_auth_blob(&ntlmsspblob,
+					&blob_len, ses, server,
+					sess_data->nls_cp);
+	if (rc)
+		goto out_free_ntlmsspblob;
+	sess_data->iov[1].iov_len = blob_len;
+	sess_data->iov[1].iov_base = ntlmsspblob;
+	pSMB->req.SecurityBlobLength = cpu_to_le16(blob_len);
+	/*
+	 * Make sure that we tell the server that we are using
+	 * the uid that it just gave us back on the response
+	 * (challenge)
+	 */
+	smb_buf->Uid = ses->Suid;
+
+	rc = _sess_auth_rawntlmssp_assemble_req(sess_data);
+	if (rc)
+		goto out_free_ntlmsspblob;
+
+	rc = sess_sendreceive(sess_data);
+	if (rc)
+		goto out_free_ntlmsspblob;
+
+	pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
+	smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base;
+	if (smb_buf->WordCount != 4) {
+		rc = -EIO;
+		cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount);
+		goto out_free_ntlmsspblob;
+	}
+
+	if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN)
+		cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */
+
+	if (ses->Suid != smb_buf->Uid) {
+		ses->Suid = smb_buf->Uid;
+		cifs_dbg(FYI, "UID changed! new UID = %llu\n", ses->Suid);
+	}
+
+	bytes_remaining = get_bcc(smb_buf);
+	bcc_ptr = pByteArea(smb_buf);
+	blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
+	if (blob_len > bytes_remaining) {
+		cifs_dbg(VFS, "bad security blob length %d\n",
+				blob_len);
+		rc = -EINVAL;
+		goto out_free_ntlmsspblob;
+	}
+	bcc_ptr += blob_len;
+	bytes_remaining -= blob_len;
+
+
+	/* BB check if Unicode and decode strings */
+	if (bytes_remaining == 0) {
+		/* no string area to decode, do nothing */
+	} else if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
+		/* unicode string area must be word-aligned */
+		if (!IS_ALIGNED((unsigned long)bcc_ptr - (unsigned long)smb_buf, 2)) {
+			++bcc_ptr;
+			--bytes_remaining;
+		}
+		decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses,
+				      sess_data->nls_cp);
+	} else {
+		decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses,
+				    sess_data->nls_cp);
+	}
+
+out_free_ntlmsspblob:
+	kfree_sensitive(ntlmsspblob);
+out:
+	sess_free_buffer(sess_data);
+
+	if (!rc)
+		rc = sess_establish_session(sess_data);
+
+	/* Cleanup */
+	kfree_sensitive(ses->auth_key.response);
+	ses->auth_key.response = NULL;
+	kfree_sensitive(ses->ntlmssp);
+	ses->ntlmssp = NULL;
+
+	sess_data->func = NULL;
+	sess_data->result = rc;
+}
+
+static int select_sec(struct sess_data *sess_data)
+{
+	int type;
+	struct cifs_ses *ses = sess_data->ses;
+	struct TCP_Server_Info *server = sess_data->server;
+
+	type = cifs_select_sectype(server, ses->sectype);
+	cifs_dbg(FYI, "sess setup type %d\n", type);
+	if (type == Unspecified) {
+		cifs_dbg(VFS, "Unable to select appropriate authentication method!\n");
+		return -EINVAL;
+	}
+
+	switch (type) {
+	case NTLMv2:
+		sess_data->func = sess_auth_ntlmv2;
+		break;
+	case Kerberos:
+#ifdef CONFIG_CIFS_UPCALL
+		sess_data->func = sess_auth_kerberos;
+		break;
+#else
+		cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
+		return -ENOSYS;
+#endif /* CONFIG_CIFS_UPCALL */
+	case RawNTLMSSP:
+		sess_data->func = sess_auth_rawntlmssp_negotiate;
+		break;
+	default:
+		cifs_dbg(VFS, "secType %d not supported!\n", type);
+		return -ENOSYS;
+	}
+
+	return 0;
+}
+
+int CIFS_SessSetup(const unsigned int xid, struct cifs_ses *ses,
+		   struct TCP_Server_Info *server,
+		   const struct nls_table *nls_cp)
+{
+	int rc = 0;
+	struct sess_data *sess_data;
+
+	if (ses == NULL) {
+		WARN(1, "%s: ses == NULL!", __func__);
+		return -EINVAL;
+	}
+
+	sess_data = kzalloc(sizeof(struct sess_data), GFP_KERNEL);
+	if (!sess_data)
+		return -ENOMEM;
+
+	sess_data->xid = xid;
+	sess_data->ses = ses;
+	sess_data->server = server;
+	sess_data->buf0_type = CIFS_NO_BUFFER;
+	sess_data->nls_cp = (struct nls_table *) nls_cp;
+
+	rc = select_sec(sess_data);
+	if (rc)
+		goto out;
+
+	while (sess_data->func)
+		sess_data->func(sess_data);
+
+	/* Store result before we free sess_data */
+	rc = sess_data->result;
+
+out:
+	kfree_sensitive(sess_data);
+	return rc;
+}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
diff --git a/fs/smb/client/smb1ops.c b/fs/smb/client/smb1ops.c
new file mode 100644
index 0000000000..64e25233e8
--- /dev/null
+++ b/fs/smb/client/smb1ops.c
@@ -0,0 +1,1257 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  SMB1 (CIFS) version specific operations
+ *
+ *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
+ */
+
+#include <linux/pagemap.h>
+#include <linux/vfs.h>
+#include <uapi/linux/magic.h>
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifspdu.h"
+#include "cifs_unicode.h"
+#include "fs_context.h"
+
+/*
+ * An NT cancel request header looks just like the original request except:
+ *
+ * The Command is SMB_COM_NT_CANCEL
+ * The WordCount is zeroed out
+ * The ByteCount is zeroed out
+ *
+ * This function mangles an existing request buffer into a
+ * SMB_COM_NT_CANCEL request and then sends it.
+ */
+static int
+send_nt_cancel(struct TCP_Server_Info *server, struct smb_rqst *rqst,
+	       struct mid_q_entry *mid)
+{
+	int rc = 0;
+	struct smb_hdr *in_buf = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
+
+	/* -4 for RFC1001 length and +2 for BCC field */
+	in_buf->smb_buf_length = cpu_to_be32(sizeof(struct smb_hdr) - 4  + 2);
+	in_buf->Command = SMB_COM_NT_CANCEL;
+	in_buf->WordCount = 0;
+	put_bcc(0, in_buf);
+
+	cifs_server_lock(server);
+	rc = cifs_sign_smb(in_buf, server, &mid->sequence_number);
+	if (rc) {
+		cifs_server_unlock(server);
+		return rc;
+	}
+
+	/*
+	 * The response to this call was already factored into the sequence
+	 * number when the call went out, so we must adjust it back downward
+	 * after signing here.
+	 */
+	--server->sequence_number;
+	rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length));
+	if (rc < 0)
+		server->sequence_number--;
+
+	cifs_server_unlock(server);
+
+	cifs_dbg(FYI, "issued NT_CANCEL for mid %u, rc = %d\n",
+		 get_mid(in_buf), rc);
+
+	return rc;
+}
+
+static bool
+cifs_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
+{
+	return ob1->fid.netfid == ob2->fid.netfid;
+}
+
+static unsigned int
+cifs_read_data_offset(char *buf)
+{
+	READ_RSP *rsp = (READ_RSP *)buf;
+	return le16_to_cpu(rsp->DataOffset);
+}
+
+static unsigned int
+cifs_read_data_length(char *buf, bool in_remaining)
+{
+	READ_RSP *rsp = (READ_RSP *)buf;
+	/* It's a bug reading remaining data for SMB1 packets */
+	WARN_ON(in_remaining);
+	return (le16_to_cpu(rsp->DataLengthHigh) << 16) +
+	       le16_to_cpu(rsp->DataLength);
+}
+
+static struct mid_q_entry *
+cifs_find_mid(struct TCP_Server_Info *server, char *buffer)
+{
+	struct smb_hdr *buf = (struct smb_hdr *)buffer;
+	struct mid_q_entry *mid;
+
+	spin_lock(&server->mid_lock);
+	list_for_each_entry(mid, &server->pending_mid_q, qhead) {
+		if (compare_mid(mid->mid, buf) &&
+		    mid->mid_state == MID_REQUEST_SUBMITTED &&
+		    le16_to_cpu(mid->command) == buf->Command) {
+			kref_get(&mid->refcount);
+			spin_unlock(&server->mid_lock);
+			return mid;
+		}
+	}
+	spin_unlock(&server->mid_lock);
+	return NULL;
+}
+
+static void
+cifs_add_credits(struct TCP_Server_Info *server,
+		 const struct cifs_credits *credits, const int optype)
+{
+	spin_lock(&server->req_lock);
+	server->credits += credits->value;
+	server->in_flight--;
+	spin_unlock(&server->req_lock);
+	wake_up(&server->request_q);
+}
+
+static void
+cifs_set_credits(struct TCP_Server_Info *server, const int val)
+{
+	spin_lock(&server->req_lock);
+	server->credits = val;
+	server->oplocks = val > 1 ? enable_oplocks : false;
+	spin_unlock(&server->req_lock);
+}
+
+static int *
+cifs_get_credits_field(struct TCP_Server_Info *server, const int optype)
+{
+	return &server->credits;
+}
+
+static unsigned int
+cifs_get_credits(struct mid_q_entry *mid)
+{
+	return 1;
+}
+
+/*
+ * Find a free multiplex id (SMB mid). Otherwise there could be
+ * mid collisions which might cause problems, demultiplexing the
+ * wrong response to this request. Multiplex ids could collide if
+ * one of a series requests takes much longer than the others, or
+ * if a very large number of long lived requests (byte range
+ * locks or FindNotify requests) are pending. No more than
+ * 64K-1 requests can be outstanding at one time. If no
+ * mids are available, return zero. A future optimization
+ * could make the combination of mids and uid the key we use
+ * to demultiplex on (rather than mid alone).
+ * In addition to the above check, the cifs demultiplex
+ * code already used the command code as a secondary
+ * check of the frame and if signing is negotiated the
+ * response would be discarded if the mid were the same
+ * but the signature was wrong. Since the mid is not put in the
+ * pending queue until later (when it is about to be dispatched)
+ * we do have to limit the number of outstanding requests
+ * to somewhat less than 64K-1 although it is hard to imagine
+ * so many threads being in the vfs at one time.
+ */
+static __u64
+cifs_get_next_mid(struct TCP_Server_Info *server)
+{
+	__u64 mid = 0;
+	__u16 last_mid, cur_mid;
+	bool collision, reconnect = false;
+
+	spin_lock(&server->mid_lock);
+
+	/* mid is 16 bit only for CIFS/SMB */
+	cur_mid = (__u16)((server->CurrentMid) & 0xffff);
+	/* we do not want to loop forever */
+	last_mid = cur_mid;
+	cur_mid++;
+	/* avoid 0xFFFF MID */
+	if (cur_mid == 0xffff)
+		cur_mid++;
+
+	/*
+	 * This nested loop looks more expensive than it is.
+	 * In practice the list of pending requests is short,
+	 * fewer than 50, and the mids are likely to be unique
+	 * on the first pass through the loop unless some request
+	 * takes longer than the 64 thousand requests before it
+	 * (and it would also have to have been a request that
+	 * did not time out).
+	 */
+	while (cur_mid != last_mid) {
+		struct mid_q_entry *mid_entry;
+		unsigned int num_mids;
+
+		collision = false;
+		if (cur_mid == 0)
+			cur_mid++;
+
+		num_mids = 0;
+		list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
+			++num_mids;
+			if (mid_entry->mid == cur_mid &&
+			    mid_entry->mid_state == MID_REQUEST_SUBMITTED) {
+				/* This mid is in use, try a different one */
+				collision = true;
+				break;
+			}
+		}
+
+		/*
+		 * if we have more than 32k mids in the list, then something
+		 * is very wrong. Possibly a local user is trying to DoS the
+		 * box by issuing long-running calls and SIGKILL'ing them. If
+		 * we get to 2^16 mids then we're in big trouble as this
+		 * function could loop forever.
+		 *
+		 * Go ahead and assign out the mid in this situation, but force
+		 * an eventual reconnect to clean out the pending_mid_q.
+		 */
+		if (num_mids > 32768)
+			reconnect = true;
+
+		if (!collision) {
+			mid = (__u64)cur_mid;
+			server->CurrentMid = mid;
+			break;
+		}
+		cur_mid++;
+	}
+	spin_unlock(&server->mid_lock);
+
+	if (reconnect) {
+		cifs_signal_cifsd_for_reconnect(server, false);
+	}
+
+	return mid;
+}
+
+/*
+	return codes:
+		0	not a transact2, or all data present
+		>0	transact2 with that much data missing
+		-EINVAL	invalid transact2
+ */
+static int
+check2ndT2(char *buf)
+{
+	struct smb_hdr *pSMB = (struct smb_hdr *)buf;
+	struct smb_t2_rsp *pSMBt;
+	int remaining;
+	__u16 total_data_size, data_in_this_rsp;
+
+	if (pSMB->Command != SMB_COM_TRANSACTION2)
+		return 0;
+
+	/* check for plausible wct, bcc and t2 data and parm sizes */
+	/* check for parm and data offset going beyond end of smb */
+	if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
+		cifs_dbg(FYI, "Invalid transact2 word count\n");
+		return -EINVAL;
+	}
+
+	pSMBt = (struct smb_t2_rsp *)pSMB;
+
+	total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount);
+	data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount);
+
+	if (total_data_size == data_in_this_rsp)
+		return 0;
+	else if (total_data_size < data_in_this_rsp) {
+		cifs_dbg(FYI, "total data %d smaller than data in frame %d\n",
+			 total_data_size, data_in_this_rsp);
+		return -EINVAL;
+	}
+
+	remaining = total_data_size - data_in_this_rsp;
+
+	cifs_dbg(FYI, "missing %d bytes from transact2, check next response\n",
+		 remaining);
+	if (total_data_size > CIFSMaxBufSize) {
+		cifs_dbg(VFS, "TotalDataSize %d is over maximum buffer %d\n",
+			 total_data_size, CIFSMaxBufSize);
+		return -EINVAL;
+	}
+	return remaining;
+}
+
+static int
+coalesce_t2(char *second_buf, struct smb_hdr *target_hdr)
+{
+	struct smb_t2_rsp *pSMBs = (struct smb_t2_rsp *)second_buf;
+	struct smb_t2_rsp *pSMBt  = (struct smb_t2_rsp *)target_hdr;
+	char *data_area_of_tgt;
+	char *data_area_of_src;
+	int remaining;
+	unsigned int byte_count, total_in_tgt;
+	__u16 tgt_total_cnt, src_total_cnt, total_in_src;
+
+	src_total_cnt = get_unaligned_le16(&pSMBs->t2_rsp.TotalDataCount);
+	tgt_total_cnt = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount);
+
+	if (tgt_total_cnt != src_total_cnt)
+		cifs_dbg(FYI, "total data count of primary and secondary t2 differ source=%hu target=%hu\n",
+			 src_total_cnt, tgt_total_cnt);
+
+	total_in_tgt = get_unaligned_le16(&pSMBt->t2_rsp.DataCount);
+
+	remaining = tgt_total_cnt - total_in_tgt;
+
+	if (remaining < 0) {
+		cifs_dbg(FYI, "Server sent too much data. tgt_total_cnt=%hu total_in_tgt=%u\n",
+			 tgt_total_cnt, total_in_tgt);
+		return -EPROTO;
+	}
+
+	if (remaining == 0) {
+		/* nothing to do, ignore */
+		cifs_dbg(FYI, "no more data remains\n");
+		return 0;
+	}
+
+	total_in_src = get_unaligned_le16(&pSMBs->t2_rsp.DataCount);
+	if (remaining < total_in_src)
+		cifs_dbg(FYI, "transact2 2nd response contains too much data\n");
+
+	/* find end of first SMB data area */
+	data_area_of_tgt = (char *)&pSMBt->hdr.Protocol +
+				get_unaligned_le16(&pSMBt->t2_rsp.DataOffset);
+
+	/* validate target area */
+	data_area_of_src = (char *)&pSMBs->hdr.Protocol +
+				get_unaligned_le16(&pSMBs->t2_rsp.DataOffset);
+
+	data_area_of_tgt += total_in_tgt;
+
+	total_in_tgt += total_in_src;
+	/* is the result too big for the field? */
+	if (total_in_tgt > USHRT_MAX) {
+		cifs_dbg(FYI, "coalesced DataCount too large (%u)\n",
+			 total_in_tgt);
+		return -EPROTO;
+	}
+	put_unaligned_le16(total_in_tgt, &pSMBt->t2_rsp.DataCount);
+
+	/* fix up the BCC */
+	byte_count = get_bcc(target_hdr);
+	byte_count += total_in_src;
+	/* is the result too big for the field? */
+	if (byte_count > USHRT_MAX) {
+		cifs_dbg(FYI, "coalesced BCC too large (%u)\n", byte_count);
+		return -EPROTO;
+	}
+	put_bcc(byte_count, target_hdr);
+
+	byte_count = be32_to_cpu(target_hdr->smb_buf_length);
+	byte_count += total_in_src;
+	/* don't allow buffer to overflow */
+	if (byte_count > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
+		cifs_dbg(FYI, "coalesced BCC exceeds buffer size (%u)\n",
+			 byte_count);
+		return -ENOBUFS;
+	}
+	target_hdr->smb_buf_length = cpu_to_be32(byte_count);
+
+	/* copy second buffer into end of first buffer */
+	memcpy(data_area_of_tgt, data_area_of_src, total_in_src);
+
+	if (remaining != total_in_src) {
+		/* more responses to go */
+		cifs_dbg(FYI, "waiting for more secondary responses\n");
+		return 1;
+	}
+
+	/* we are done */
+	cifs_dbg(FYI, "found the last secondary response\n");
+	return 0;
+}
+
+static void
+cifs_downgrade_oplock(struct TCP_Server_Info *server,
+		      struct cifsInodeInfo *cinode, __u32 oplock,
+		      unsigned int epoch, bool *purge_cache)
+{
+	cifs_set_oplock_level(cinode, oplock);
+}
+
+static bool
+cifs_check_trans2(struct mid_q_entry *mid, struct TCP_Server_Info *server,
+		  char *buf, int malformed)
+{
+	if (malformed)
+		return false;
+	if (check2ndT2(buf) <= 0)
+		return false;
+	mid->multiRsp = true;
+	if (mid->resp_buf) {
+		/* merge response - fix up 1st*/
+		malformed = coalesce_t2(buf, mid->resp_buf);
+		if (malformed > 0)
+			return true;
+		/* All parts received or packet is malformed. */
+		mid->multiEnd = true;
+		dequeue_mid(mid, malformed);
+		return true;
+	}
+	if (!server->large_buf) {
+		/*FIXME: switch to already allocated largebuf?*/
+		cifs_dbg(VFS, "1st trans2 resp needs bigbuf\n");
+	} else {
+		/* Have first buffer */
+		mid->resp_buf = buf;
+		mid->large_buf = true;
+		server->bigbuf = NULL;
+	}
+	return true;
+}
+
+static bool
+cifs_need_neg(struct TCP_Server_Info *server)
+{
+	return server->maxBuf == 0;
+}
+
+static int
+cifs_negotiate(const unsigned int xid,
+	       struct cifs_ses *ses,
+	       struct TCP_Server_Info *server)
+{
+	int rc;
+	rc = CIFSSMBNegotiate(xid, ses, server);
+	if (rc == -EAGAIN) {
+		/* retry only once on 1st time connection */
+		set_credits(server, 1);
+		rc = CIFSSMBNegotiate(xid, ses, server);
+		if (rc == -EAGAIN)
+			rc = -EHOSTDOWN;
+	}
+	return rc;
+}
+
+static unsigned int
+cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
+{
+	__u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
+	struct TCP_Server_Info *server = tcon->ses->server;
+	unsigned int wsize;
+
+	/* start with specified wsize, or default */
+	if (ctx->wsize)
+		wsize = ctx->wsize;
+	else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP))
+		wsize = CIFS_DEFAULT_IOSIZE;
+	else
+		wsize = CIFS_DEFAULT_NON_POSIX_WSIZE;
+
+	/* can server support 24-bit write sizes? (via UNIX extensions) */
+	if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP))
+		wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE);
+
+	/*
+	 * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set?
+	 * Limit it to max buffer offered by the server, minus the size of the
+	 * WRITEX header, not including the 4 byte RFC1001 length.
+	 */
+	if (!(server->capabilities & CAP_LARGE_WRITE_X) ||
+	    (!(server->capabilities & CAP_UNIX) && server->sign))
+		wsize = min_t(unsigned int, wsize,
+				server->maxBuf - sizeof(WRITE_REQ) + 4);
+
+	/* hard limit of CIFS_MAX_WSIZE */
+	wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE);
+
+	return wsize;
+}
+
+static unsigned int
+cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
+{
+	__u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
+	struct TCP_Server_Info *server = tcon->ses->server;
+	unsigned int rsize, defsize;
+
+	/*
+	 * Set default value...
+	 *
+	 * HACK alert! Ancient servers have very small buffers. Even though
+	 * MS-CIFS indicates that servers are only limited by the client's
+	 * bufsize for reads, testing against win98se shows that it throws
+	 * INVALID_PARAMETER errors if you try to request too large a read.
+	 * OS/2 just sends back short reads.
+	 *
+	 * If the server doesn't advertise CAP_LARGE_READ_X, then assume that
+	 * it can't handle a read request larger than its MaxBufferSize either.
+	 */
+	if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP))
+		defsize = CIFS_DEFAULT_IOSIZE;
+	else if (server->capabilities & CAP_LARGE_READ_X)
+		defsize = CIFS_DEFAULT_NON_POSIX_RSIZE;
+	else
+		defsize = server->maxBuf - sizeof(READ_RSP);
+
+	rsize = ctx->rsize ? ctx->rsize : defsize;
+
+	/*
+	 * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to
+	 * the client's MaxBufferSize.
+	 */
+	if (!(server->capabilities & CAP_LARGE_READ_X))
+		rsize = min_t(unsigned int, CIFSMaxBufSize, rsize);
+
+	/* hard limit of CIFS_MAX_RSIZE */
+	rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE);
+
+	return rsize;
+}
+
+static void
+cifs_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
+	      struct cifs_sb_info *cifs_sb)
+{
+	CIFSSMBQFSDeviceInfo(xid, tcon);
+	CIFSSMBQFSAttributeInfo(xid, tcon);
+}
+
+static int
+cifs_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
+			struct cifs_sb_info *cifs_sb, const char *full_path)
+{
+	int rc;
+	FILE_ALL_INFO *file_info;
+
+	file_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
+	if (file_info == NULL)
+		return -ENOMEM;
+
+	rc = CIFSSMBQPathInfo(xid, tcon, full_path, file_info,
+			      0 /* not legacy */, cifs_sb->local_nls,
+			      cifs_remap(cifs_sb));
+
+	if (rc == -EOPNOTSUPP || rc == -EINVAL)
+		rc = SMBQueryInformation(xid, tcon, full_path, file_info,
+				cifs_sb->local_nls, cifs_remap(cifs_sb));
+	kfree(file_info);
+	return rc;
+}
+
+static int cifs_query_path_info(const unsigned int xid,
+				struct cifs_tcon *tcon,
+				struct cifs_sb_info *cifs_sb,
+				const char *full_path,
+				struct cifs_open_info_data *data)
+{
+	int rc;
+	FILE_ALL_INFO fi = {};
+
+	data->symlink = false;
+	data->adjust_tz = false;
+
+	/* could do find first instead but this returns more info */
+	rc = CIFSSMBQPathInfo(xid, tcon, full_path, &fi, 0 /* not legacy */, cifs_sb->local_nls,
+			      cifs_remap(cifs_sb));
+	/*
+	 * BB optimize code so we do not make the above call when server claims
+	 * no NT SMB support and the above call failed at least once - set flag
+	 * in tcon or mount.
+	 */
+	if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
+		rc = SMBQueryInformation(xid, tcon, full_path, &fi, cifs_sb->local_nls,
+					 cifs_remap(cifs_sb));
+		data->adjust_tz = true;
+	}
+
+	if (!rc) {
+		int tmprc;
+		int oplock = 0;
+		struct cifs_fid fid;
+		struct cifs_open_parms oparms;
+
+		move_cifs_info_to_smb2(&data->fi, &fi);
+
+		if (!(le32_to_cpu(fi.Attributes) & ATTR_REPARSE))
+			return 0;
+
+		oparms = (struct cifs_open_parms) {
+			.tcon = tcon,
+			.cifs_sb = cifs_sb,
+			.desired_access = FILE_READ_ATTRIBUTES,
+			.create_options = cifs_create_options(cifs_sb, 0),
+			.disposition = FILE_OPEN,
+			.path = full_path,
+			.fid = &fid,
+		};
+
+		/* Need to check if this is a symbolic link or not */
+		tmprc = CIFS_open(xid, &oparms, &oplock, NULL);
+		if (tmprc == -EOPNOTSUPP)
+			data->symlink = true;
+		else if (tmprc == 0)
+			CIFSSMBClose(xid, tcon, fid.netfid);
+	}
+
+	return rc;
+}
+
+static int cifs_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
+			     struct cifs_sb_info *cifs_sb, const char *full_path,
+			     u64 *uniqueid, struct cifs_open_info_data *unused)
+{
+	/*
+	 * We can not use the IndexNumber field by default from Windows or
+	 * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA
+	 * CIFS spec claims that this value is unique within the scope of a
+	 * share, and the windows docs hint that it's actually unique
+	 * per-machine.
+	 *
+	 * There may be higher info levels that work but are there Windows
+	 * server or network appliances for which IndexNumber field is not
+	 * guaranteed unique?
+	 */
+	return CIFSGetSrvInodeNumber(xid, tcon, full_path, uniqueid,
+				     cifs_sb->local_nls,
+				     cifs_remap(cifs_sb));
+}
+
+static int cifs_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
+				struct cifsFileInfo *cfile, struct cifs_open_info_data *data)
+{
+	int rc;
+	FILE_ALL_INFO fi = {};
+
+	if (cfile->symlink_target) {
+		data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
+		if (!data->symlink_target)
+			return -ENOMEM;
+	}
+
+	rc = CIFSSMBQFileInfo(xid, tcon, cfile->fid.netfid, &fi);
+	if (!rc)
+		move_cifs_info_to_smb2(&data->fi, &fi);
+	return rc;
+}
+
+static void
+cifs_clear_stats(struct cifs_tcon *tcon)
+{
+	atomic_set(&tcon->stats.cifs_stats.num_writes, 0);
+	atomic_set(&tcon->stats.cifs_stats.num_reads, 0);
+	atomic_set(&tcon->stats.cifs_stats.num_flushes, 0);
+	atomic_set(&tcon->stats.cifs_stats.num_oplock_brks, 0);
+	atomic_set(&tcon->stats.cifs_stats.num_opens, 0);
+	atomic_set(&tcon->stats.cifs_stats.num_posixopens, 0);
+	atomic_set(&tcon->stats.cifs_stats.num_posixmkdirs, 0);
+	atomic_set(&tcon->stats.cifs_stats.num_closes, 0);
+	atomic_set(&tcon->stats.cifs_stats.num_deletes, 0);
+	atomic_set(&tcon->stats.cifs_stats.num_mkdirs, 0);
+	atomic_set(&tcon->stats.cifs_stats.num_rmdirs, 0);
+	atomic_set(&tcon->stats.cifs_stats.num_renames, 0);
+	atomic_set(&tcon->stats.cifs_stats.num_t2renames, 0);
+	atomic_set(&tcon->stats.cifs_stats.num_ffirst, 0);
+	atomic_set(&tcon->stats.cifs_stats.num_fnext, 0);
+	atomic_set(&tcon->stats.cifs_stats.num_fclose, 0);
+	atomic_set(&tcon->stats.cifs_stats.num_hardlinks, 0);
+	atomic_set(&tcon->stats.cifs_stats.num_symlinks, 0);
+	atomic_set(&tcon->stats.cifs_stats.num_locks, 0);
+	atomic_set(&tcon->stats.cifs_stats.num_acl_get, 0);
+	atomic_set(&tcon->stats.cifs_stats.num_acl_set, 0);
+}
+
+static void
+cifs_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
+{
+	seq_printf(m, " Oplocks breaks: %d",
+		   atomic_read(&tcon->stats.cifs_stats.num_oplock_brks));
+	seq_printf(m, "\nReads:  %d Bytes: %llu",
+		   atomic_read(&tcon->stats.cifs_stats.num_reads),
+		   (long long)(tcon->bytes_read));
+	seq_printf(m, "\nWrites: %d Bytes: %llu",
+		   atomic_read(&tcon->stats.cifs_stats.num_writes),
+		   (long long)(tcon->bytes_written));
+	seq_printf(m, "\nFlushes: %d",
+		   atomic_read(&tcon->stats.cifs_stats.num_flushes));
+	seq_printf(m, "\nLocks: %d HardLinks: %d Symlinks: %d",
+		   atomic_read(&tcon->stats.cifs_stats.num_locks),
+		   atomic_read(&tcon->stats.cifs_stats.num_hardlinks),
+		   atomic_read(&tcon->stats.cifs_stats.num_symlinks));
+	seq_printf(m, "\nOpens: %d Closes: %d Deletes: %d",
+		   atomic_read(&tcon->stats.cifs_stats.num_opens),
+		   atomic_read(&tcon->stats.cifs_stats.num_closes),
+		   atomic_read(&tcon->stats.cifs_stats.num_deletes));
+	seq_printf(m, "\nPosix Opens: %d Posix Mkdirs: %d",
+		   atomic_read(&tcon->stats.cifs_stats.num_posixopens),
+		   atomic_read(&tcon->stats.cifs_stats.num_posixmkdirs));
+	seq_printf(m, "\nMkdirs: %d Rmdirs: %d",
+		   atomic_read(&tcon->stats.cifs_stats.num_mkdirs),
+		   atomic_read(&tcon->stats.cifs_stats.num_rmdirs));
+	seq_printf(m, "\nRenames: %d T2 Renames %d",
+		   atomic_read(&tcon->stats.cifs_stats.num_renames),
+		   atomic_read(&tcon->stats.cifs_stats.num_t2renames));
+	seq_printf(m, "\nFindFirst: %d FNext %d FClose %d",
+		   atomic_read(&tcon->stats.cifs_stats.num_ffirst),
+		   atomic_read(&tcon->stats.cifs_stats.num_fnext),
+		   atomic_read(&tcon->stats.cifs_stats.num_fclose));
+}
+
+static void
+cifs_mkdir_setinfo(struct inode *inode, const char *full_path,
+		   struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
+		   const unsigned int xid)
+{
+	FILE_BASIC_INFO info;
+	struct cifsInodeInfo *cifsInode;
+	u32 dosattrs;
+	int rc;
+
+	memset(&info, 0, sizeof(info));
+	cifsInode = CIFS_I(inode);
+	dosattrs = cifsInode->cifsAttrs|ATTR_READONLY;
+	info.Attributes = cpu_to_le32(dosattrs);
+	rc = CIFSSMBSetPathInfo(xid, tcon, full_path, &info, cifs_sb->local_nls,
+				cifs_sb);
+	if (rc == 0)
+		cifsInode->cifsAttrs = dosattrs;
+}
+
+static int cifs_open_file(const unsigned int xid, struct cifs_open_parms *oparms, __u32 *oplock,
+			  void *buf)
+{
+	struct cifs_open_info_data *data = buf;
+	FILE_ALL_INFO fi = {};
+	int rc;
+
+	if (!(oparms->tcon->ses->capabilities & CAP_NT_SMBS))
+		rc = SMBLegacyOpen(xid, oparms->tcon, oparms->path,
+				   oparms->disposition,
+				   oparms->desired_access,
+				   oparms->create_options,
+				   &oparms->fid->netfid, oplock, &fi,
+				   oparms->cifs_sb->local_nls,
+				   cifs_remap(oparms->cifs_sb));
+	else
+		rc = CIFS_open(xid, oparms, oplock, &fi);
+
+	if (!rc && data)
+		move_cifs_info_to_smb2(&data->fi, &fi);
+
+	return rc;
+}
+
+static void
+cifs_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
+{
+	struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
+	cfile->fid.netfid = fid->netfid;
+	cifs_set_oplock_level(cinode, oplock);
+	cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
+}
+
+static void
+cifs_close_file(const unsigned int xid, struct cifs_tcon *tcon,
+		struct cifs_fid *fid)
+{
+	CIFSSMBClose(xid, tcon, fid->netfid);
+}
+
+static int
+cifs_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
+		struct cifs_fid *fid)
+{
+	return CIFSSMBFlush(xid, tcon, fid->netfid);
+}
+
+static int
+cifs_sync_read(const unsigned int xid, struct cifs_fid *pfid,
+	       struct cifs_io_parms *parms, unsigned int *bytes_read,
+	       char **buf, int *buf_type)
+{
+	parms->netfid = pfid->netfid;
+	return CIFSSMBRead(xid, parms, bytes_read, buf, buf_type);
+}
+
+static int
+cifs_sync_write(const unsigned int xid, struct cifs_fid *pfid,
+		struct cifs_io_parms *parms, unsigned int *written,
+		struct kvec *iov, unsigned long nr_segs)
+{
+
+	parms->netfid = pfid->netfid;
+	return CIFSSMBWrite2(xid, parms, written, iov, nr_segs);
+}
+
+static int
+smb_set_file_info(struct inode *inode, const char *full_path,
+		  FILE_BASIC_INFO *buf, const unsigned int xid)
+{
+	int oplock = 0;
+	int rc;
+	__u32 netpid;
+	struct cifs_fid fid;
+	struct cifs_open_parms oparms;
+	struct cifsFileInfo *open_file;
+	struct cifsInodeInfo *cinode = CIFS_I(inode);
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct tcon_link *tlink = NULL;
+	struct cifs_tcon *tcon;
+
+	/* if the file is already open for write, just use that fileid */
+	open_file = find_writable_file(cinode, FIND_WR_FSUID_ONLY);
+	if (open_file) {
+		fid.netfid = open_file->fid.netfid;
+		netpid = open_file->pid;
+		tcon = tlink_tcon(open_file->tlink);
+		goto set_via_filehandle;
+	}
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink)) {
+		rc = PTR_ERR(tlink);
+		tlink = NULL;
+		goto out;
+	}
+	tcon = tlink_tcon(tlink);
+
+	rc = CIFSSMBSetPathInfo(xid, tcon, full_path, buf, cifs_sb->local_nls,
+				cifs_sb);
+	if (rc == 0) {
+		cinode->cifsAttrs = le32_to_cpu(buf->Attributes);
+		goto out;
+	} else if (rc != -EOPNOTSUPP && rc != -EINVAL) {
+		goto out;
+	}
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.cifs_sb = cifs_sb,
+		.desired_access = SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
+		.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR),
+		.disposition = FILE_OPEN,
+		.path = full_path,
+		.fid = &fid,
+	};
+
+	cifs_dbg(FYI, "calling SetFileInfo since SetPathInfo for times not supported by this server\n");
+	rc = CIFS_open(xid, &oparms, &oplock, NULL);
+	if (rc != 0) {
+		if (rc == -EIO)
+			rc = -EINVAL;
+		goto out;
+	}
+
+	netpid = current->tgid;
+
+set_via_filehandle:
+	rc = CIFSSMBSetFileInfo(xid, tcon, buf, fid.netfid, netpid);
+	if (!rc)
+		cinode->cifsAttrs = le32_to_cpu(buf->Attributes);
+
+	if (open_file == NULL)
+		CIFSSMBClose(xid, tcon, fid.netfid);
+	else
+		cifsFileInfo_put(open_file);
+out:
+	if (tlink != NULL)
+		cifs_put_tlink(tlink);
+	return rc;
+}
+
+static int
+cifs_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
+		   struct cifsFileInfo *cfile)
+{
+	return CIFSSMB_set_compression(xid, tcon, cfile->fid.netfid);
+}
+
+static int
+cifs_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
+		     const char *path, struct cifs_sb_info *cifs_sb,
+		     struct cifs_fid *fid, __u16 search_flags,
+		     struct cifs_search_info *srch_inf)
+{
+	int rc;
+
+	rc = CIFSFindFirst(xid, tcon, path, cifs_sb,
+			   &fid->netfid, search_flags, srch_inf, true);
+	if (rc)
+		cifs_dbg(FYI, "find first failed=%d\n", rc);
+	return rc;
+}
+
+static int
+cifs_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
+		    struct cifs_fid *fid, __u16 search_flags,
+		    struct cifs_search_info *srch_inf)
+{
+	return CIFSFindNext(xid, tcon, fid->netfid, search_flags, srch_inf);
+}
+
+static int
+cifs_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
+	       struct cifs_fid *fid)
+{
+	return CIFSFindClose(xid, tcon, fid->netfid);
+}
+
+static int
+cifs_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid,
+		__u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode)
+{
+	return CIFSSMBLock(0, tcon, net_fid, current->tgid, 0, 0, 0, 0,
+			   LOCKING_ANDX_OPLOCK_RELEASE, false, CIFS_CACHE_READ(cinode) ? 1 : 0);
+}
+
+static int
+cifs_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
+	     struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
+{
+	int rc = -EOPNOTSUPP;
+
+	buf->f_type = CIFS_SUPER_MAGIC;
+
+	/*
+	 * We could add a second check for a QFS Unix capability bit
+	 */
+	if ((tcon->ses->capabilities & CAP_UNIX) &&
+	    (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
+		rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
+
+	/*
+	 * Only need to call the old QFSInfo if failed on newer one,
+	 * e.g. by OS/2.
+	 **/
+	if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
+		rc = CIFSSMBQFSInfo(xid, tcon, buf);
+
+	/*
+	 * Some old Windows servers also do not support level 103, retry with
+	 * older level one if old server failed the previous call or we
+	 * bypassed it because we detected that this was an older LANMAN sess
+	 */
+	if (rc)
+		rc = SMBOldQFSInfo(xid, tcon, buf);
+	return rc;
+}
+
+static int
+cifs_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
+	       __u64 length, __u32 type, int lock, int unlock, bool wait)
+{
+	return CIFSSMBLock(xid, tlink_tcon(cfile->tlink), cfile->fid.netfid,
+			   current->tgid, length, offset, unlock, lock,
+			   (__u8)type, wait, 0);
+}
+
+static int
+cifs_unix_dfs_readlink(const unsigned int xid, struct cifs_tcon *tcon,
+		       const unsigned char *searchName, char **symlinkinfo,
+		       const struct nls_table *nls_codepage)
+{
+#ifdef CONFIG_CIFS_DFS_UPCALL
+	int rc;
+	struct dfs_info3_param referral = {0};
+
+	rc = get_dfs_path(xid, tcon->ses, searchName, nls_codepage, &referral,
+			  0);
+
+	if (!rc) {
+		*symlinkinfo = kstrdup(referral.node_name, GFP_KERNEL);
+		free_dfs_info_param(&referral);
+		if (!*symlinkinfo)
+			rc = -ENOMEM;
+	}
+	return rc;
+#else /* No DFS support */
+	return -EREMOTE;
+#endif
+}
+
+static int cifs_query_symlink(const unsigned int xid,
+			      struct cifs_tcon *tcon,
+			      struct cifs_sb_info *cifs_sb,
+			      const char *full_path,
+			      char **target_path)
+{
+	int rc;
+
+	cifs_tcon_dbg(FYI, "%s: path=%s\n", __func__, full_path);
+
+	if (!cap_unix(tcon->ses))
+		return -EOPNOTSUPP;
+
+	rc = CIFSSMBUnixQuerySymLink(xid, tcon, full_path, target_path,
+				     cifs_sb->local_nls, cifs_remap(cifs_sb));
+	if (rc == -EREMOTE)
+		rc = cifs_unix_dfs_readlink(xid, tcon, full_path,
+					    target_path, cifs_sb->local_nls);
+	return rc;
+}
+
+static int cifs_parse_reparse_point(struct cifs_sb_info *cifs_sb,
+				    struct kvec *rsp_iov,
+				    struct cifs_open_info_data *data)
+{
+	struct reparse_data_buffer *buf;
+	TRANSACT_IOCTL_RSP *io = rsp_iov->iov_base;
+	bool unicode = !!(io->hdr.Flags2 & SMBFLG2_UNICODE);
+	u32 plen = le16_to_cpu(io->ByteCount);
+
+	buf = (struct reparse_data_buffer *)((__u8 *)&io->hdr.Protocol +
+					     le32_to_cpu(io->DataOffset));
+	return parse_reparse_point(buf, plen, cifs_sb, unicode, data);
+}
+
+static bool
+cifs_is_read_op(__u32 oplock)
+{
+	return oplock == OPLOCK_READ;
+}
+
+static unsigned int
+cifs_wp_retry_size(struct inode *inode)
+{
+	return CIFS_SB(inode->i_sb)->ctx->wsize;
+}
+
+static bool
+cifs_dir_needs_close(struct cifsFileInfo *cfile)
+{
+	return !cfile->srch_inf.endOfSearch && !cfile->invalidHandle;
+}
+
+static bool
+cifs_can_echo(struct TCP_Server_Info *server)
+{
+	if (server->tcpStatus == CifsGood)
+		return true;
+
+	return false;
+}
+
+static int
+cifs_make_node(unsigned int xid, struct inode *inode,
+	       struct dentry *dentry, struct cifs_tcon *tcon,
+	       const char *full_path, umode_t mode, dev_t dev)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct inode *newinode = NULL;
+	int rc = -EPERM;
+	struct cifs_open_info_data buf = {};
+	struct cifs_io_parms io_parms;
+	__u32 oplock = 0;
+	struct cifs_fid fid;
+	struct cifs_open_parms oparms;
+	unsigned int bytes_written;
+	struct win_dev *pdev;
+	struct kvec iov[2];
+
+	if (tcon->unix_ext) {
+		/*
+		 * SMB1 Unix Extensions: requires server support but
+		 * works with all special files
+		 */
+		struct cifs_unix_set_info_args args = {
+			.mode	= mode & ~current_umask(),
+			.ctime	= NO_CHANGE_64,
+			.atime	= NO_CHANGE_64,
+			.mtime	= NO_CHANGE_64,
+			.device	= dev,
+		};
+		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
+			args.uid = current_fsuid();
+			args.gid = current_fsgid();
+		} else {
+			args.uid = INVALID_UID; /* no change */
+			args.gid = INVALID_GID; /* no change */
+		}
+		rc = CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
+					    cifs_sb->local_nls,
+					    cifs_remap(cifs_sb));
+		if (rc)
+			return rc;
+
+		rc = cifs_get_inode_info_unix(&newinode, full_path,
+					      inode->i_sb, xid);
+
+		if (rc == 0)
+			d_instantiate(dentry, newinode);
+		return rc;
+	}
+
+	/*
+	 * SMB1 SFU emulation: should work with all servers, but only
+	 * support block and char device (no socket & fifo)
+	 */
+	if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
+		return rc;
+
+	if (!S_ISCHR(mode) && !S_ISBLK(mode))
+		return rc;
+
+	cifs_dbg(FYI, "sfu compat create special file\n");
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.cifs_sb = cifs_sb,
+		.desired_access = GENERIC_WRITE,
+		.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
+						      CREATE_OPTION_SPECIAL),
+		.disposition = FILE_CREATE,
+		.path = full_path,
+		.fid = &fid,
+	};
+
+	if (tcon->ses->server->oplocks)
+		oplock = REQ_OPLOCK;
+	else
+		oplock = 0;
+	rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, &buf);
+	if (rc)
+		return rc;
+
+	/*
+	 * BB Do not bother to decode buf since no local inode yet to put
+	 * timestamps in, but we can reuse it safely.
+	 */
+
+	pdev = (struct win_dev *)&buf.fi;
+	io_parms.pid = current->tgid;
+	io_parms.tcon = tcon;
+	io_parms.offset = 0;
+	io_parms.length = sizeof(struct win_dev);
+	iov[1].iov_base = &buf.fi;
+	iov[1].iov_len = sizeof(struct win_dev);
+	if (S_ISCHR(mode)) {
+		memcpy(pdev->type, "IntxCHR", 8);
+		pdev->major = cpu_to_le64(MAJOR(dev));
+		pdev->minor = cpu_to_le64(MINOR(dev));
+		rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
+							&bytes_written, iov, 1);
+	} else if (S_ISBLK(mode)) {
+		memcpy(pdev->type, "IntxBLK", 8);
+		pdev->major = cpu_to_le64(MAJOR(dev));
+		pdev->minor = cpu_to_le64(MINOR(dev));
+		rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
+							&bytes_written, iov, 1);
+	}
+	tcon->ses->server->ops->close(xid, tcon, &fid);
+	d_drop(dentry);
+
+	/* FIXME: add code here to set EAs */
+
+	cifs_free_open_info(&buf);
+	return rc;
+}
+
+
+
+struct smb_version_operations smb1_operations = {
+	.send_cancel = send_nt_cancel,
+	.compare_fids = cifs_compare_fids,
+	.setup_request = cifs_setup_request,
+	.setup_async_request = cifs_setup_async_request,
+	.check_receive = cifs_check_receive,
+	.add_credits = cifs_add_credits,
+	.set_credits = cifs_set_credits,
+	.get_credits_field = cifs_get_credits_field,
+	.get_credits = cifs_get_credits,
+	.wait_mtu_credits = cifs_wait_mtu_credits,
+	.get_next_mid = cifs_get_next_mid,
+	.read_data_offset = cifs_read_data_offset,
+	.read_data_length = cifs_read_data_length,
+	.map_error = map_smb_to_linux_error,
+	.find_mid = cifs_find_mid,
+	.check_message = checkSMB,
+	.dump_detail = cifs_dump_detail,
+	.clear_stats = cifs_clear_stats,
+	.print_stats = cifs_print_stats,
+	.is_oplock_break = is_valid_oplock_break,
+	.downgrade_oplock = cifs_downgrade_oplock,
+	.check_trans2 = cifs_check_trans2,
+	.need_neg = cifs_need_neg,
+	.negotiate = cifs_negotiate,
+	.negotiate_wsize = cifs_negotiate_wsize,
+	.negotiate_rsize = cifs_negotiate_rsize,
+	.sess_setup = CIFS_SessSetup,
+	.logoff = CIFSSMBLogoff,
+	.tree_connect = CIFSTCon,
+	.tree_disconnect = CIFSSMBTDis,
+	.get_dfs_refer = CIFSGetDFSRefer,
+	.qfs_tcon = cifs_qfs_tcon,
+	.is_path_accessible = cifs_is_path_accessible,
+	.can_echo = cifs_can_echo,
+	.query_path_info = cifs_query_path_info,
+	.query_reparse_point = cifs_query_reparse_point,
+	.query_file_info = cifs_query_file_info,
+	.get_srv_inum = cifs_get_srv_inum,
+	.set_path_size = CIFSSMBSetEOF,
+	.set_file_size = CIFSSMBSetFileSize,
+	.set_file_info = smb_set_file_info,
+	.set_compression = cifs_set_compression,
+	.echo = CIFSSMBEcho,
+	.mkdir = CIFSSMBMkDir,
+	.mkdir_setinfo = cifs_mkdir_setinfo,
+	.rmdir = CIFSSMBRmDir,
+	.unlink = CIFSSMBDelFile,
+	.rename_pending_delete = cifs_rename_pending_delete,
+	.rename = CIFSSMBRename,
+	.create_hardlink = CIFSCreateHardLink,
+	.query_symlink = cifs_query_symlink,
+	.parse_reparse_point = cifs_parse_reparse_point,
+	.open = cifs_open_file,
+	.set_fid = cifs_set_fid,
+	.close = cifs_close_file,
+	.flush = cifs_flush_file,
+	.async_readv = cifs_async_readv,
+	.async_writev = cifs_async_writev,
+	.sync_read = cifs_sync_read,
+	.sync_write = cifs_sync_write,
+	.query_dir_first = cifs_query_dir_first,
+	.query_dir_next = cifs_query_dir_next,
+	.close_dir = cifs_close_dir,
+	.calc_smb_size = smbCalcSize,
+	.oplock_response = cifs_oplock_response,
+	.queryfs = cifs_queryfs,
+	.mand_lock = cifs_mand_lock,
+	.mand_unlock_range = cifs_unlock_range,
+	.push_mand_locks = cifs_push_mandatory_locks,
+	.query_mf_symlink = cifs_query_mf_symlink,
+	.create_mf_symlink = cifs_create_mf_symlink,
+	.is_read_op = cifs_is_read_op,
+	.wp_retry_size = cifs_wp_retry_size,
+	.dir_needs_close = cifs_dir_needs_close,
+	.select_sectype = cifs_select_sectype,
+#ifdef CONFIG_CIFS_XATTR
+	.query_all_EAs = CIFSSMBQAllEAs,
+	.set_EA = CIFSSMBSetEA,
+#endif /* CIFS_XATTR */
+	.get_acl = get_cifs_acl,
+	.get_acl_by_fid = get_cifs_acl_by_fid,
+	.set_acl = set_cifs_acl,
+	.make_node = cifs_make_node,
+};
+
+struct smb_version_values smb1_values = {
+	.version_string = SMB1_VERSION_STRING,
+	.protocol_id = SMB10_PROT_ID,
+	.large_lock_type = LOCKING_ANDX_LARGE_FILES,
+	.exclusive_lock_type = 0,
+	.shared_lock_type = LOCKING_ANDX_SHARED_LOCK,
+	.unlock_lock_type = 0,
+	.header_preamble_size = 4,
+	.header_size = sizeof(struct smb_hdr),
+	.max_header_size = MAX_CIFS_HDR_SIZE,
+	.read_rsp_size = sizeof(READ_RSP),
+	.lock_cmd = cpu_to_le16(SMB_COM_LOCKING_ANDX),
+	.cap_unix = CAP_UNIX,
+	.cap_nt_find = CAP_NT_SMBS | CAP_NT_FIND,
+	.cap_large_files = CAP_LARGE_FILES,
+	.signing_enabled = SECMODE_SIGN_ENABLED,
+	.signing_required = SECMODE_SIGN_REQUIRED,
+};
diff --git a/fs/smb/client/smb2file.c b/fs/smb/client/smb2file.c
new file mode 100644
index 0000000000..e0ee96d69d
--- /dev/null
+++ b/fs/smb/client/smb2file.c
@@ -0,0 +1,372 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *
+ *   Copyright (C) International Business Machines  Corp., 2002, 2011
+ *   Author(s): Steve French (sfrench@us.ibm.com),
+ *              Pavel Shilovsky ((pshilovsky@samba.org) 2012
+ *
+ */
+#include <linux/fs.h>
+#include <linux/filelock.h>
+#include <linux/stat.h>
+#include <linux/slab.h>
+#include <linux/pagemap.h>
+#include <asm/div64.h>
+#include "cifsfs.h"
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifs_fs_sb.h"
+#include "cifs_unicode.h"
+#include "fscache.h"
+#include "smb2proto.h"
+#include "smb2status.h"
+
+static struct smb2_symlink_err_rsp *symlink_data(const struct kvec *iov)
+{
+	struct smb2_err_rsp *err = iov->iov_base;
+	struct smb2_symlink_err_rsp *sym = ERR_PTR(-EINVAL);
+	u32 len;
+
+	if (err->ErrorContextCount) {
+		struct smb2_error_context_rsp *p, *end;
+
+		len = (u32)err->ErrorContextCount * (offsetof(struct smb2_error_context_rsp,
+							      ErrorContextData) +
+						     sizeof(struct smb2_symlink_err_rsp));
+		if (le32_to_cpu(err->ByteCount) < len || iov->iov_len < len + sizeof(*err) + 1)
+			return ERR_PTR(-EINVAL);
+
+		p = (struct smb2_error_context_rsp *)err->ErrorData;
+		end = (struct smb2_error_context_rsp *)((u8 *)err + iov->iov_len);
+		do {
+			if (le32_to_cpu(p->ErrorId) == SMB2_ERROR_ID_DEFAULT) {
+				sym = (struct smb2_symlink_err_rsp *)&p->ErrorContextData;
+				break;
+			}
+			cifs_dbg(FYI, "%s: skipping unhandled error context: 0x%x\n",
+				 __func__, le32_to_cpu(p->ErrorId));
+
+			len = ALIGN(le32_to_cpu(p->ErrorDataLength), 8);
+			p = (struct smb2_error_context_rsp *)((u8 *)&p->ErrorContextData + len);
+		} while (p < end);
+	} else if (le32_to_cpu(err->ByteCount) >= sizeof(*sym) &&
+		   iov->iov_len >= SMB2_SYMLINK_STRUCT_SIZE) {
+		sym = (struct smb2_symlink_err_rsp *)err->ErrorData;
+	}
+
+	if (!IS_ERR(sym) && (le32_to_cpu(sym->SymLinkErrorTag) != SYMLINK_ERROR_TAG ||
+			     le32_to_cpu(sym->ReparseTag) != IO_REPARSE_TAG_SYMLINK))
+		sym = ERR_PTR(-EINVAL);
+
+	return sym;
+}
+
+int smb2_parse_symlink_response(struct cifs_sb_info *cifs_sb, const struct kvec *iov, char **path)
+{
+	struct smb2_symlink_err_rsp *sym;
+	unsigned int sub_offs, sub_len;
+	unsigned int print_offs, print_len;
+	char *s;
+
+	if (!cifs_sb || !iov || !iov->iov_base || !iov->iov_len || !path)
+		return -EINVAL;
+
+	sym = symlink_data(iov);
+	if (IS_ERR(sym))
+		return PTR_ERR(sym);
+
+	sub_len = le16_to_cpu(sym->SubstituteNameLength);
+	sub_offs = le16_to_cpu(sym->SubstituteNameOffset);
+	print_len = le16_to_cpu(sym->PrintNameLength);
+	print_offs = le16_to_cpu(sym->PrintNameOffset);
+
+	if (iov->iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offs + sub_len ||
+	    iov->iov_len < SMB2_SYMLINK_STRUCT_SIZE + print_offs + print_len)
+		return -EINVAL;
+
+	s = cifs_strndup_from_utf16((char *)sym->PathBuffer + sub_offs, sub_len, true,
+				    cifs_sb->local_nls);
+	if (!s)
+		return -ENOMEM;
+	convert_delimiter(s, '/');
+	cifs_dbg(FYI, "%s: symlink target: %s\n", __func__, s);
+
+	*path = s;
+	return 0;
+}
+
+int smb2_open_file(const unsigned int xid, struct cifs_open_parms *oparms, __u32 *oplock, void *buf)
+{
+	int rc;
+	__le16 *smb2_path;
+	__u8 smb2_oplock;
+	struct cifs_open_info_data *data = buf;
+	struct smb2_file_all_info file_info = {};
+	struct smb2_file_all_info *smb2_data = data ? &file_info : NULL;
+	struct kvec err_iov = {};
+	int err_buftype = CIFS_NO_BUFFER;
+	struct cifs_fid *fid = oparms->fid;
+	struct network_resiliency_req nr_ioctl_req;
+
+	smb2_path = cifs_convert_path_to_utf16(oparms->path, oparms->cifs_sb);
+	if (smb2_path == NULL)
+		return -ENOMEM;
+
+	oparms->desired_access |= FILE_READ_ATTRIBUTES;
+	smb2_oplock = SMB2_OPLOCK_LEVEL_BATCH;
+
+	rc = SMB2_open(xid, oparms, smb2_path, &smb2_oplock, smb2_data, NULL, &err_iov,
+		       &err_buftype);
+	if (rc && data) {
+		struct smb2_hdr *hdr = err_iov.iov_base;
+
+		if (unlikely(!err_iov.iov_base || err_buftype == CIFS_NO_BUFFER))
+			goto out;
+		if (hdr->Status == STATUS_STOPPED_ON_SYMLINK) {
+			rc = smb2_parse_symlink_response(oparms->cifs_sb, &err_iov,
+							 &data->symlink_target);
+			if (!rc) {
+				memset(smb2_data, 0, sizeof(*smb2_data));
+				oparms->create_options |= OPEN_REPARSE_POINT;
+				rc = SMB2_open(xid, oparms, smb2_path, &smb2_oplock, smb2_data,
+					       NULL, NULL, NULL);
+				oparms->create_options &= ~OPEN_REPARSE_POINT;
+			}
+		}
+	}
+
+	if (rc)
+		goto out;
+
+	if (oparms->tcon->use_resilient) {
+		/* default timeout is 0, servers pick default (120 seconds) */
+		nr_ioctl_req.Timeout =
+			cpu_to_le32(oparms->tcon->handle_timeout);
+		nr_ioctl_req.Reserved = 0;
+		rc = SMB2_ioctl(xid, oparms->tcon, fid->persistent_fid,
+			fid->volatile_fid, FSCTL_LMR_REQUEST_RESILIENCY,
+			(char *)&nr_ioctl_req, sizeof(nr_ioctl_req),
+			CIFSMaxBufSize, NULL, NULL /* no return info */);
+		if (rc == -EOPNOTSUPP) {
+			cifs_dbg(VFS,
+			     "resiliency not supported by server, disabling\n");
+			oparms->tcon->use_resilient = false;
+		} else if (rc)
+			cifs_dbg(FYI, "error %d setting resiliency\n", rc);
+
+		rc = 0;
+	}
+
+	if (smb2_data) {
+		/* if open response does not have IndexNumber field - get it */
+		if (smb2_data->IndexNumber == 0) {
+			rc = SMB2_get_srv_num(xid, oparms->tcon,
+				      fid->persistent_fid,
+				      fid->volatile_fid,
+				      &smb2_data->IndexNumber);
+			if (rc) {
+				/*
+				 * let get_inode_info disable server inode
+				 * numbers
+				 */
+				smb2_data->IndexNumber = 0;
+				rc = 0;
+			}
+		}
+		memcpy(&data->fi, smb2_data, sizeof(data->fi));
+	}
+
+	*oplock = smb2_oplock;
+out:
+	free_rsp_buf(err_buftype, err_iov.iov_base);
+	kfree(smb2_path);
+	return rc;
+}
+
+int
+smb2_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock,
+		  const unsigned int xid)
+{
+	int rc = 0, stored_rc;
+	unsigned int max_num, num = 0, max_buf;
+	struct smb2_lock_element *buf, *cur;
+	struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
+	struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
+	struct cifsLockInfo *li, *tmp;
+	__u64 length = 1 + flock->fl_end - flock->fl_start;
+	struct list_head tmp_llist;
+
+	INIT_LIST_HEAD(&tmp_llist);
+
+	/*
+	 * Accessing maxBuf is racy with cifs_reconnect - need to store value
+	 * and check it before using.
+	 */
+	max_buf = tcon->ses->server->maxBuf;
+	if (max_buf < sizeof(struct smb2_lock_element))
+		return -EINVAL;
+
+	BUILD_BUG_ON(sizeof(struct smb2_lock_element) > PAGE_SIZE);
+	max_buf = min_t(unsigned int, max_buf, PAGE_SIZE);
+	max_num = max_buf / sizeof(struct smb2_lock_element);
+	buf = kcalloc(max_num, sizeof(struct smb2_lock_element), GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	cur = buf;
+
+	cifs_down_write(&cinode->lock_sem);
+	list_for_each_entry_safe(li, tmp, &cfile->llist->locks, llist) {
+		if (flock->fl_start > li->offset ||
+		    (flock->fl_start + length) <
+		    (li->offset + li->length))
+			continue;
+		if (current->tgid != li->pid)
+			/*
+			 * flock and OFD lock are associated with an open
+			 * file description, not the process.
+			 */
+			if (!(flock->fl_flags & (FL_FLOCK | FL_OFDLCK)))
+				continue;
+		if (cinode->can_cache_brlcks) {
+			/*
+			 * We can cache brlock requests - simply remove a lock
+			 * from the file's list.
+			 */
+			list_del(&li->llist);
+			cifs_del_lock_waiters(li);
+			kfree(li);
+			continue;
+		}
+		cur->Length = cpu_to_le64(li->length);
+		cur->Offset = cpu_to_le64(li->offset);
+		cur->Flags = cpu_to_le32(SMB2_LOCKFLAG_UNLOCK);
+		/*
+		 * We need to save a lock here to let us add it again to the
+		 * file's list if the unlock range request fails on the server.
+		 */
+		list_move(&li->llist, &tmp_llist);
+		if (++num == max_num) {
+			stored_rc = smb2_lockv(xid, tcon,
+					       cfile->fid.persistent_fid,
+					       cfile->fid.volatile_fid,
+					       current->tgid, num, buf);
+			if (stored_rc) {
+				/*
+				 * We failed on the unlock range request - add
+				 * all locks from the tmp list to the head of
+				 * the file's list.
+				 */
+				cifs_move_llist(&tmp_llist,
+						&cfile->llist->locks);
+				rc = stored_rc;
+			} else
+				/*
+				 * The unlock range request succeed - free the
+				 * tmp list.
+				 */
+				cifs_free_llist(&tmp_llist);
+			cur = buf;
+			num = 0;
+		} else
+			cur++;
+	}
+	if (num) {
+		stored_rc = smb2_lockv(xid, tcon, cfile->fid.persistent_fid,
+				       cfile->fid.volatile_fid, current->tgid,
+				       num, buf);
+		if (stored_rc) {
+			cifs_move_llist(&tmp_llist, &cfile->llist->locks);
+			rc = stored_rc;
+		} else
+			cifs_free_llist(&tmp_llist);
+	}
+	up_write(&cinode->lock_sem);
+
+	kfree(buf);
+	return rc;
+}
+
+static int
+smb2_push_mand_fdlocks(struct cifs_fid_locks *fdlocks, const unsigned int xid,
+		       struct smb2_lock_element *buf, unsigned int max_num)
+{
+	int rc = 0, stored_rc;
+	struct cifsFileInfo *cfile = fdlocks->cfile;
+	struct cifsLockInfo *li;
+	unsigned int num = 0;
+	struct smb2_lock_element *cur = buf;
+	struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
+
+	list_for_each_entry(li, &fdlocks->locks, llist) {
+		cur->Length = cpu_to_le64(li->length);
+		cur->Offset = cpu_to_le64(li->offset);
+		cur->Flags = cpu_to_le32(li->type |
+						SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
+		if (++num == max_num) {
+			stored_rc = smb2_lockv(xid, tcon,
+					       cfile->fid.persistent_fid,
+					       cfile->fid.volatile_fid,
+					       current->tgid, num, buf);
+			if (stored_rc)
+				rc = stored_rc;
+			cur = buf;
+			num = 0;
+		} else
+			cur++;
+	}
+	if (num) {
+		stored_rc = smb2_lockv(xid, tcon,
+				       cfile->fid.persistent_fid,
+				       cfile->fid.volatile_fid,
+				       current->tgid, num, buf);
+		if (stored_rc)
+			rc = stored_rc;
+	}
+
+	return rc;
+}
+
+int
+smb2_push_mandatory_locks(struct cifsFileInfo *cfile)
+{
+	int rc = 0, stored_rc;
+	unsigned int xid;
+	unsigned int max_num, max_buf;
+	struct smb2_lock_element *buf;
+	struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
+	struct cifs_fid_locks *fdlocks;
+
+	xid = get_xid();
+
+	/*
+	 * Accessing maxBuf is racy with cifs_reconnect - need to store value
+	 * and check it for zero before using.
+	 */
+	max_buf = tlink_tcon(cfile->tlink)->ses->server->maxBuf;
+	if (max_buf < sizeof(struct smb2_lock_element)) {
+		free_xid(xid);
+		return -EINVAL;
+	}
+
+	BUILD_BUG_ON(sizeof(struct smb2_lock_element) > PAGE_SIZE);
+	max_buf = min_t(unsigned int, max_buf, PAGE_SIZE);
+	max_num = max_buf / sizeof(struct smb2_lock_element);
+	buf = kcalloc(max_num, sizeof(struct smb2_lock_element), GFP_KERNEL);
+	if (!buf) {
+		free_xid(xid);
+		return -ENOMEM;
+	}
+
+	list_for_each_entry(fdlocks, &cinode->llist, llist) {
+		stored_rc = smb2_push_mand_fdlocks(fdlocks, xid, buf, max_num);
+		if (stored_rc)
+			rc = stored_rc;
+	}
+
+	kfree(buf);
+	free_xid(xid);
+	return rc;
+}
diff --git a/fs/smb/client/smb2glob.h b/fs/smb/client/smb2glob.h
new file mode 100644
index 0000000000..82e916ad16
--- /dev/null
+++ b/fs/smb/client/smb2glob.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+/*
+ *
+ *   Definitions for various global variables and structures
+ *
+ *   Copyright (C) International Business Machines  Corp., 2002, 2011
+ *                 Etersoft, 2012
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *              Jeremy Allison (jra@samba.org)
+ *              Pavel Shilovsky (pshilovsky@samba.org) 2012
+ *
+ */
+#ifndef _SMB2_GLOB_H
+#define _SMB2_GLOB_H
+
+/*
+ *****************************************************************
+ * Constants go here
+ *****************************************************************
+ */
+
+/*
+ * Identifiers for functions that use the open, operation, close pattern
+ * in smb2inode.c:smb2_compound_op()
+ */
+#define SMB2_OP_SET_DELETE 1
+#define SMB2_OP_SET_INFO 2
+#define SMB2_OP_QUERY_INFO 3
+#define SMB2_OP_QUERY_DIR 4
+#define SMB2_OP_MKDIR 5
+#define SMB2_OP_RENAME 6
+#define SMB2_OP_DELETE 7
+#define SMB2_OP_HARDLINK 8
+#define SMB2_OP_SET_EOF 9
+#define SMB2_OP_RMDIR 10
+#define SMB2_OP_POSIX_QUERY_INFO 11
+
+/* Used when constructing chained read requests. */
+#define CHAINED_REQUEST 1
+#define START_OF_CHAIN 2
+#define END_OF_CHAIN 4
+#define RELATED_REQUEST 8
+
+#endif	/* _SMB2_GLOB_H */
diff --git a/fs/smb/client/smb2inode.c b/fs/smb/client/smb2inode.c
new file mode 100644
index 0000000000..c94940af5d
--- /dev/null
+++ b/fs/smb/client/smb2inode.c
@@ -0,0 +1,871 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *
+ *   Copyright (C) International Business Machines  Corp., 2002, 2011
+ *                 Etersoft, 2012
+ *   Author(s): Pavel Shilovsky (pshilovsky@samba.org),
+ *              Steve French (sfrench@us.ibm.com)
+ *
+ */
+#include <linux/fs.h>
+#include <linux/stat.h>
+#include <linux/slab.h>
+#include <linux/pagemap.h>
+#include <asm/div64.h>
+#include "cifsfs.h"
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifs_fs_sb.h"
+#include "cifs_unicode.h"
+#include "fscache.h"
+#include "smb2glob.h"
+#include "smb2pdu.h"
+#include "smb2proto.h"
+#include "cached_dir.h"
+#include "smb2status.h"
+
+static void
+free_set_inf_compound(struct smb_rqst *rqst)
+{
+	if (rqst[1].rq_iov)
+		SMB2_set_info_free(&rqst[1]);
+	if (rqst[2].rq_iov)
+		SMB2_close_free(&rqst[2]);
+}
+
+/*
+ * note: If cfile is passed, the reference to it is dropped here.
+ * So make sure that you do not reuse cfile after return from this func.
+ *
+ * If passing @out_iov and @out_buftype, ensure to make them both large enough
+ * (>= 3) to hold all compounded responses.  Caller is also responsible for
+ * freeing them up with free_rsp_buf().
+ */
+static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
+			    struct cifs_sb_info *cifs_sb, const char *full_path,
+			    __u32 desired_access, __u32 create_disposition, __u32 create_options,
+			    umode_t mode, void *ptr, int command, struct cifsFileInfo *cfile,
+			    __u8 **extbuf, size_t *extbuflen,
+			    struct kvec *out_iov, int *out_buftype)
+{
+	struct smb2_compound_vars *vars = NULL;
+	struct kvec *rsp_iov;
+	struct smb_rqst *rqst;
+	int rc;
+	__le16 *utf16_path = NULL;
+	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
+	struct cifs_fid fid;
+	struct cifs_ses *ses = tcon->ses;
+	struct TCP_Server_Info *server;
+	int num_rqst = 0;
+	int resp_buftype[3];
+	struct smb2_query_info_rsp *qi_rsp = NULL;
+	struct cifs_open_info_data *idata;
+	int flags = 0;
+	__u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
+	unsigned int size[2];
+	void *data[2];
+	int len;
+
+	vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
+	if (vars == NULL)
+		return -ENOMEM;
+	rqst = &vars->rqst[0];
+	rsp_iov = &vars->rsp_iov[0];
+
+	server = cifs_pick_channel(ses);
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
+
+	/* We already have a handle so we can skip the open */
+	if (cfile)
+		goto after_open;
+
+	/* Open */
+	utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
+	if (!utf16_path) {
+		rc = -ENOMEM;
+		goto finished;
+	}
+
+	vars->oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.path = full_path,
+		.desired_access = desired_access,
+		.disposition = create_disposition,
+		.create_options = cifs_create_options(cifs_sb, create_options),
+		.fid = &fid,
+		.mode = mode,
+		.cifs_sb = cifs_sb,
+	};
+
+	rqst[num_rqst].rq_iov = &vars->open_iov[0];
+	rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
+	rc = SMB2_open_init(tcon, server,
+			    &rqst[num_rqst], &oplock, &vars->oparms,
+			    utf16_path);
+	kfree(utf16_path);
+	if (rc)
+		goto finished;
+
+	smb2_set_next_command(tcon, &rqst[num_rqst]);
+ after_open:
+	num_rqst++;
+	rc = 0;
+
+	/* Operation */
+	switch (command) {
+	case SMB2_OP_QUERY_INFO:
+		rqst[num_rqst].rq_iov = &vars->qi_iov;
+		rqst[num_rqst].rq_nvec = 1;
+
+		if (cfile)
+			rc = SMB2_query_info_init(tcon, server,
+				&rqst[num_rqst],
+				cfile->fid.persistent_fid,
+				cfile->fid.volatile_fid,
+				FILE_ALL_INFORMATION,
+				SMB2_O_INFO_FILE, 0,
+				sizeof(struct smb2_file_all_info) +
+					  PATH_MAX * 2, 0, NULL);
+		else {
+			rc = SMB2_query_info_init(tcon, server,
+				&rqst[num_rqst],
+				COMPOUND_FID,
+				COMPOUND_FID,
+				FILE_ALL_INFORMATION,
+				SMB2_O_INFO_FILE, 0,
+				sizeof(struct smb2_file_all_info) +
+					  PATH_MAX * 2, 0, NULL);
+			if (!rc) {
+				smb2_set_next_command(tcon, &rqst[num_rqst]);
+				smb2_set_related(&rqst[num_rqst]);
+			}
+		}
+
+		if (rc)
+			goto finished;
+		num_rqst++;
+		trace_smb3_query_info_compound_enter(xid, ses->Suid, tcon->tid,
+						     full_path);
+		break;
+	case SMB2_OP_POSIX_QUERY_INFO:
+		rqst[num_rqst].rq_iov = &vars->qi_iov;
+		rqst[num_rqst].rq_nvec = 1;
+
+		if (cfile)
+			rc = SMB2_query_info_init(tcon, server,
+				&rqst[num_rqst],
+				cfile->fid.persistent_fid,
+				cfile->fid.volatile_fid,
+				SMB_FIND_FILE_POSIX_INFO,
+				SMB2_O_INFO_FILE, 0,
+				/* TBD: fix following to allow for longer SIDs */
+				sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
+				(sizeof(struct cifs_sid) * 2), 0, NULL);
+		else {
+			rc = SMB2_query_info_init(tcon, server,
+				&rqst[num_rqst],
+				COMPOUND_FID,
+				COMPOUND_FID,
+				SMB_FIND_FILE_POSIX_INFO,
+				SMB2_O_INFO_FILE, 0,
+				sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
+				(sizeof(struct cifs_sid) * 2), 0, NULL);
+			if (!rc) {
+				smb2_set_next_command(tcon, &rqst[num_rqst]);
+				smb2_set_related(&rqst[num_rqst]);
+			}
+		}
+
+		if (rc)
+			goto finished;
+		num_rqst++;
+		trace_smb3_posix_query_info_compound_enter(xid, ses->Suid, tcon->tid, full_path);
+		break;
+	case SMB2_OP_DELETE:
+		trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
+		break;
+	case SMB2_OP_MKDIR:
+		/*
+		 * Directories are created through parameters in the
+		 * SMB2_open() call.
+		 */
+		trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
+		break;
+	case SMB2_OP_RMDIR:
+		rqst[num_rqst].rq_iov = &vars->si_iov[0];
+		rqst[num_rqst].rq_nvec = 1;
+
+		size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
+		data[0] = &delete_pending[0];
+
+		rc = SMB2_set_info_init(tcon, server,
+					&rqst[num_rqst], COMPOUND_FID,
+					COMPOUND_FID, current->tgid,
+					FILE_DISPOSITION_INFORMATION,
+					SMB2_O_INFO_FILE, 0, data, size);
+		if (rc)
+			goto finished;
+		smb2_set_next_command(tcon, &rqst[num_rqst]);
+		smb2_set_related(&rqst[num_rqst++]);
+		trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
+		break;
+	case SMB2_OP_SET_EOF:
+		rqst[num_rqst].rq_iov = &vars->si_iov[0];
+		rqst[num_rqst].rq_nvec = 1;
+
+		size[0] = 8; /* sizeof __le64 */
+		data[0] = ptr;
+
+		if (cfile) {
+			rc = SMB2_set_info_init(tcon, server,
+						&rqst[num_rqst],
+						cfile->fid.persistent_fid,
+						cfile->fid.volatile_fid,
+						current->tgid,
+						FILE_END_OF_FILE_INFORMATION,
+						SMB2_O_INFO_FILE, 0,
+						data, size);
+		} else {
+			rc = SMB2_set_info_init(tcon, server,
+						&rqst[num_rqst],
+						COMPOUND_FID,
+						COMPOUND_FID,
+						current->tgid,
+						FILE_END_OF_FILE_INFORMATION,
+						SMB2_O_INFO_FILE, 0,
+						data, size);
+			if (!rc) {
+				smb2_set_next_command(tcon, &rqst[num_rqst]);
+				smb2_set_related(&rqst[num_rqst]);
+			}
+		}
+		if (rc)
+			goto finished;
+		num_rqst++;
+		trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
+		break;
+	case SMB2_OP_SET_INFO:
+		rqst[num_rqst].rq_iov = &vars->si_iov[0];
+		rqst[num_rqst].rq_nvec = 1;
+
+
+		size[0] = sizeof(FILE_BASIC_INFO);
+		data[0] = ptr;
+
+		if (cfile)
+			rc = SMB2_set_info_init(tcon, server,
+				&rqst[num_rqst],
+				cfile->fid.persistent_fid,
+				cfile->fid.volatile_fid, current->tgid,
+				FILE_BASIC_INFORMATION,
+				SMB2_O_INFO_FILE, 0, data, size);
+		else {
+			rc = SMB2_set_info_init(tcon, server,
+				&rqst[num_rqst],
+				COMPOUND_FID,
+				COMPOUND_FID, current->tgid,
+				FILE_BASIC_INFORMATION,
+				SMB2_O_INFO_FILE, 0, data, size);
+			if (!rc) {
+				smb2_set_next_command(tcon, &rqst[num_rqst]);
+				smb2_set_related(&rqst[num_rqst]);
+			}
+		}
+
+		if (rc)
+			goto finished;
+		num_rqst++;
+		trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid,
+						   full_path);
+		break;
+	case SMB2_OP_RENAME:
+		rqst[num_rqst].rq_iov = &vars->si_iov[0];
+		rqst[num_rqst].rq_nvec = 2;
+
+		len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
+
+		vars->rename_info.ReplaceIfExists = 1;
+		vars->rename_info.RootDirectory = 0;
+		vars->rename_info.FileNameLength = cpu_to_le32(len);
+
+		size[0] = sizeof(struct smb2_file_rename_info);
+		data[0] = &vars->rename_info;
+
+		size[1] = len + 2 /* null */;
+		data[1] = (__le16 *)ptr;
+
+		if (cfile)
+			rc = SMB2_set_info_init(tcon, server,
+						&rqst[num_rqst],
+						cfile->fid.persistent_fid,
+						cfile->fid.volatile_fid,
+					current->tgid, FILE_RENAME_INFORMATION,
+					SMB2_O_INFO_FILE, 0, data, size);
+		else {
+			rc = SMB2_set_info_init(tcon, server,
+					&rqst[num_rqst],
+					COMPOUND_FID, COMPOUND_FID,
+					current->tgid, FILE_RENAME_INFORMATION,
+					SMB2_O_INFO_FILE, 0, data, size);
+			if (!rc) {
+				smb2_set_next_command(tcon, &rqst[num_rqst]);
+				smb2_set_related(&rqst[num_rqst]);
+			}
+		}
+		if (rc)
+			goto finished;
+		num_rqst++;
+		trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
+		break;
+	case SMB2_OP_HARDLINK:
+		rqst[num_rqst].rq_iov = &vars->si_iov[0];
+		rqst[num_rqst].rq_nvec = 2;
+
+		len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
+
+		vars->link_info.ReplaceIfExists = 0;
+		vars->link_info.RootDirectory = 0;
+		vars->link_info.FileNameLength = cpu_to_le32(len);
+
+		size[0] = sizeof(struct smb2_file_link_info);
+		data[0] = &vars->link_info;
+
+		size[1] = len + 2 /* null */;
+		data[1] = (__le16 *)ptr;
+
+		rc = SMB2_set_info_init(tcon, server,
+					&rqst[num_rqst], COMPOUND_FID,
+					COMPOUND_FID, current->tgid,
+					FILE_LINK_INFORMATION,
+					SMB2_O_INFO_FILE, 0, data, size);
+		if (rc)
+			goto finished;
+		smb2_set_next_command(tcon, &rqst[num_rqst]);
+		smb2_set_related(&rqst[num_rqst++]);
+		trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
+		break;
+	default:
+		cifs_dbg(VFS, "Invalid command\n");
+		rc = -EINVAL;
+	}
+	if (rc)
+		goto finished;
+
+	/* We already have a handle so we can skip the close */
+	if (cfile)
+		goto after_close;
+	/* Close */
+	flags |= CIFS_CP_CREATE_CLOSE_OP;
+	rqst[num_rqst].rq_iov = &vars->close_iov;
+	rqst[num_rqst].rq_nvec = 1;
+	rc = SMB2_close_init(tcon, server,
+			     &rqst[num_rqst], COMPOUND_FID,
+			     COMPOUND_FID, false);
+	smb2_set_related(&rqst[num_rqst]);
+	if (rc)
+		goto finished;
+ after_close:
+	num_rqst++;
+
+	if (cfile) {
+		rc = compound_send_recv(xid, ses, server,
+					flags, num_rqst - 2,
+					&rqst[1], &resp_buftype[1],
+					&rsp_iov[1]);
+	} else
+		rc = compound_send_recv(xid, ses, server,
+					flags, num_rqst,
+					rqst, resp_buftype,
+					rsp_iov);
+
+ finished:
+	SMB2_open_free(&rqst[0]);
+	if (rc == -EREMCHG) {
+		pr_warn_once("server share %s deleted\n", tcon->tree_name);
+		tcon->need_reconnect = true;
+	}
+
+	switch (command) {
+	case SMB2_OP_QUERY_INFO:
+		idata = ptr;
+		if (rc == 0 && cfile && cfile->symlink_target) {
+			idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
+			if (!idata->symlink_target)
+				rc = -ENOMEM;
+		}
+		if (rc == 0) {
+			qi_rsp = (struct smb2_query_info_rsp *)
+				rsp_iov[1].iov_base;
+			rc = smb2_validate_and_copy_iov(
+				le16_to_cpu(qi_rsp->OutputBufferOffset),
+				le32_to_cpu(qi_rsp->OutputBufferLength),
+				&rsp_iov[1], sizeof(idata->fi), (char *)&idata->fi);
+		}
+		if (rqst[1].rq_iov)
+			SMB2_query_info_free(&rqst[1]);
+		if (rqst[2].rq_iov)
+			SMB2_close_free(&rqst[2]);
+		if (rc)
+			trace_smb3_query_info_compound_err(xid,  ses->Suid,
+						tcon->tid, rc);
+		else
+			trace_smb3_query_info_compound_done(xid, ses->Suid,
+						tcon->tid);
+		break;
+	case SMB2_OP_POSIX_QUERY_INFO:
+		idata = ptr;
+		if (rc == 0 && cfile && cfile->symlink_target) {
+			idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
+			if (!idata->symlink_target)
+				rc = -ENOMEM;
+		}
+		if (rc == 0) {
+			qi_rsp = (struct smb2_query_info_rsp *)
+				rsp_iov[1].iov_base;
+			rc = smb2_validate_and_copy_iov(
+				le16_to_cpu(qi_rsp->OutputBufferOffset),
+				le32_to_cpu(qi_rsp->OutputBufferLength),
+				&rsp_iov[1], sizeof(idata->posix_fi) /* add SIDs */,
+				(char *)&idata->posix_fi);
+		}
+		if (rc == 0) {
+			unsigned int length = le32_to_cpu(qi_rsp->OutputBufferLength);
+
+			if (length > sizeof(idata->posix_fi)) {
+				char *base = (char *)rsp_iov[1].iov_base +
+					le16_to_cpu(qi_rsp->OutputBufferOffset) +
+					sizeof(idata->posix_fi);
+				*extbuflen = length - sizeof(idata->posix_fi);
+				*extbuf = kmemdup(base, *extbuflen, GFP_KERNEL);
+				if (!*extbuf)
+					rc = -ENOMEM;
+			} else {
+				rc = -EINVAL;
+			}
+		}
+		if (rqst[1].rq_iov)
+			SMB2_query_info_free(&rqst[1]);
+		if (rqst[2].rq_iov)
+			SMB2_close_free(&rqst[2]);
+		if (rc)
+			trace_smb3_posix_query_info_compound_err(xid,  ses->Suid, tcon->tid, rc);
+		else
+			trace_smb3_posix_query_info_compound_done(xid, ses->Suid, tcon->tid);
+		break;
+	case SMB2_OP_DELETE:
+		if (rc)
+			trace_smb3_delete_err(xid,  ses->Suid, tcon->tid, rc);
+		else
+			trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
+		if (rqst[1].rq_iov)
+			SMB2_close_free(&rqst[1]);
+		break;
+	case SMB2_OP_MKDIR:
+		if (rc)
+			trace_smb3_mkdir_err(xid,  ses->Suid, tcon->tid, rc);
+		else
+			trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
+		if (rqst[1].rq_iov)
+			SMB2_close_free(&rqst[1]);
+		break;
+	case SMB2_OP_HARDLINK:
+		if (rc)
+			trace_smb3_hardlink_err(xid,  ses->Suid, tcon->tid, rc);
+		else
+			trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
+		free_set_inf_compound(rqst);
+		break;
+	case SMB2_OP_RENAME:
+		if (rc)
+			trace_smb3_rename_err(xid,  ses->Suid, tcon->tid, rc);
+		else
+			trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
+		free_set_inf_compound(rqst);
+		break;
+	case SMB2_OP_RMDIR:
+		if (rc)
+			trace_smb3_rmdir_err(xid,  ses->Suid, tcon->tid, rc);
+		else
+			trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
+		free_set_inf_compound(rqst);
+		break;
+	case SMB2_OP_SET_EOF:
+		if (rc)
+			trace_smb3_set_eof_err(xid,  ses->Suid, tcon->tid, rc);
+		else
+			trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
+		free_set_inf_compound(rqst);
+		break;
+	case SMB2_OP_SET_INFO:
+		if (rc)
+			trace_smb3_set_info_compound_err(xid,  ses->Suid,
+						tcon->tid, rc);
+		else
+			trace_smb3_set_info_compound_done(xid, ses->Suid,
+						tcon->tid);
+		free_set_inf_compound(rqst);
+		break;
+	}
+
+	if (cfile)
+		cifsFileInfo_put(cfile);
+
+	if (out_iov && out_buftype) {
+		memcpy(out_iov, rsp_iov, 3 * sizeof(*out_iov));
+		memcpy(out_buftype, resp_buftype, 3 * sizeof(*out_buftype));
+	} else {
+		free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
+		free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
+		free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
+	}
+	kfree(vars);
+	return rc;
+}
+
+static int parse_create_response(struct cifs_open_info_data *data,
+				 struct cifs_sb_info *cifs_sb,
+				 const struct kvec *iov)
+{
+	struct smb2_create_rsp *rsp = iov->iov_base;
+	bool reparse_point = false;
+	u32 tag = 0;
+	int rc = 0;
+
+	switch (rsp->hdr.Status) {
+	case STATUS_IO_REPARSE_TAG_NOT_HANDLED:
+		reparse_point = true;
+		break;
+	case STATUS_STOPPED_ON_SYMLINK:
+		rc = smb2_parse_symlink_response(cifs_sb, iov,
+						 &data->symlink_target);
+		if (rc)
+			return rc;
+		tag = IO_REPARSE_TAG_SYMLINK;
+		reparse_point = true;
+		break;
+	case STATUS_SUCCESS:
+		reparse_point = !!(rsp->Flags & SMB2_CREATE_FLAG_REPARSEPOINT);
+		break;
+	}
+	data->reparse_point = reparse_point;
+	data->reparse.tag = tag;
+	return rc;
+}
+
+int smb2_query_path_info(const unsigned int xid,
+			 struct cifs_tcon *tcon,
+			 struct cifs_sb_info *cifs_sb,
+			 const char *full_path,
+			 struct cifs_open_info_data *data)
+{
+	__u32 create_options = 0;
+	struct cifsFileInfo *cfile;
+	struct cached_fid *cfid = NULL;
+	struct smb2_hdr *hdr;
+	struct kvec out_iov[3] = {};
+	int out_buftype[3] = {};
+	bool islink;
+	int rc, rc2;
+
+	data->adjust_tz = false;
+	data->reparse_point = false;
+
+	if (strcmp(full_path, ""))
+		rc = -ENOENT;
+	else
+		rc = open_cached_dir(xid, tcon, full_path, cifs_sb, false, &cfid);
+	/* If it is a root and its handle is cached then use it */
+	if (!rc) {
+		if (cfid->file_all_info_is_valid) {
+			memcpy(&data->fi, &cfid->file_all_info, sizeof(data->fi));
+		} else {
+			rc = SMB2_query_info(xid, tcon, cfid->fid.persistent_fid,
+					     cfid->fid.volatile_fid, &data->fi);
+		}
+		close_cached_dir(cfid);
+		return rc;
+	}
+
+	cifs_get_readable_path(tcon, full_path, &cfile);
+	rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, FILE_OPEN,
+			      create_options, ACL_NO_MODE, data, SMB2_OP_QUERY_INFO, cfile,
+			      NULL, NULL, out_iov, out_buftype);
+	hdr = out_iov[0].iov_base;
+	/*
+	 * If first iov is unset, then SMB session was dropped or we've got a
+	 * cached open file (@cfile).
+	 */
+	if (!hdr || out_buftype[0] == CIFS_NO_BUFFER)
+		goto out;
+
+	switch (rc) {
+	case 0:
+	case -EOPNOTSUPP:
+		rc = parse_create_response(data, cifs_sb, &out_iov[0]);
+		if (rc || !data->reparse_point)
+			goto out;
+
+		create_options |= OPEN_REPARSE_POINT;
+		/* Failed on a symbolic link - query a reparse point info */
+		cifs_get_readable_path(tcon, full_path, &cfile);
+		rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
+				      FILE_READ_ATTRIBUTES, FILE_OPEN,
+				      create_options, ACL_NO_MODE, data,
+				      SMB2_OP_QUERY_INFO, cfile, NULL, NULL,
+				      NULL, NULL);
+		break;
+	case -EREMOTE:
+		break;
+	default:
+		if (hdr->Status != STATUS_OBJECT_NAME_INVALID)
+			break;
+		rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
+						     full_path, &islink);
+		if (rc2) {
+			rc = rc2;
+			goto out;
+		}
+		if (islink)
+			rc = -EREMOTE;
+	}
+
+out:
+	free_rsp_buf(out_buftype[0], out_iov[0].iov_base);
+	free_rsp_buf(out_buftype[1], out_iov[1].iov_base);
+	free_rsp_buf(out_buftype[2], out_iov[2].iov_base);
+	return rc;
+}
+
+int smb311_posix_query_path_info(const unsigned int xid,
+				 struct cifs_tcon *tcon,
+				 struct cifs_sb_info *cifs_sb,
+				 const char *full_path,
+				 struct cifs_open_info_data *data,
+				 struct cifs_sid *owner,
+				 struct cifs_sid *group)
+{
+	int rc;
+	__u32 create_options = 0;
+	struct cifsFileInfo *cfile;
+	struct kvec out_iov[3] = {};
+	int out_buftype[3] = {};
+	__u8 *sidsbuf = NULL;
+	__u8 *sidsbuf_end = NULL;
+	size_t sidsbuflen = 0;
+	size_t owner_len, group_len;
+
+	data->adjust_tz = false;
+	data->reparse_point = false;
+
+	/*
+	 * BB TODO: Add support for using the cached root handle.
+	 * Create SMB2_query_posix_info worker function to do non-compounded query
+	 * when we already have an open file handle for this. For now this is fast enough
+	 * (always using the compounded version).
+	 */
+
+	cifs_get_readable_path(tcon, full_path, &cfile);
+	rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, FILE_OPEN,
+			      create_options, ACL_NO_MODE, data, SMB2_OP_POSIX_QUERY_INFO, cfile,
+			      &sidsbuf, &sidsbuflen, out_iov, out_buftype);
+	/*
+	 * If first iov is unset, then SMB session was dropped or we've got a
+	 * cached open file (@cfile).
+	 */
+	if (!out_iov[0].iov_base || out_buftype[0] == CIFS_NO_BUFFER)
+		goto out;
+
+	switch (rc) {
+	case 0:
+	case -EOPNOTSUPP:
+		/* BB TODO: When support for special files added to Samba re-verify this path */
+		rc = parse_create_response(data, cifs_sb, &out_iov[0]);
+		if (rc || !data->reparse_point)
+			goto out;
+
+		create_options |= OPEN_REPARSE_POINT;
+		/* Failed on a symbolic link - query a reparse point info */
+		cifs_get_readable_path(tcon, full_path, &cfile);
+		rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES,
+				      FILE_OPEN, create_options, ACL_NO_MODE, data,
+				      SMB2_OP_POSIX_QUERY_INFO, cfile,
+				      &sidsbuf, &sidsbuflen, NULL, NULL);
+		break;
+	}
+
+out:
+	if (rc == 0) {
+		sidsbuf_end = sidsbuf + sidsbuflen;
+
+		owner_len = posix_info_sid_size(sidsbuf, sidsbuf_end);
+		if (owner_len == -1) {
+			rc = -EINVAL;
+			goto out;
+		}
+		memcpy(owner, sidsbuf, owner_len);
+
+		group_len = posix_info_sid_size(
+			sidsbuf + owner_len, sidsbuf_end);
+		if (group_len == -1) {
+			rc = -EINVAL;
+			goto out;
+		}
+		memcpy(group, sidsbuf + owner_len, group_len);
+	}
+
+	kfree(sidsbuf);
+	free_rsp_buf(out_buftype[0], out_iov[0].iov_base);
+	free_rsp_buf(out_buftype[1], out_iov[1].iov_base);
+	free_rsp_buf(out_buftype[2], out_iov[2].iov_base);
+	return rc;
+}
+
+int
+smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
+	   struct cifs_tcon *tcon, const char *name,
+	   struct cifs_sb_info *cifs_sb)
+{
+	return smb2_compound_op(xid, tcon, cifs_sb, name,
+				FILE_WRITE_ATTRIBUTES, FILE_CREATE,
+				CREATE_NOT_FILE, mode, NULL, SMB2_OP_MKDIR,
+				NULL, NULL, NULL, NULL, NULL);
+}
+
+void
+smb2_mkdir_setinfo(struct inode *inode, const char *name,
+		   struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
+		   const unsigned int xid)
+{
+	FILE_BASIC_INFO data;
+	struct cifsInodeInfo *cifs_i;
+	struct cifsFileInfo *cfile;
+	u32 dosattrs;
+	int tmprc;
+
+	memset(&data, 0, sizeof(data));
+	cifs_i = CIFS_I(inode);
+	dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
+	data.Attributes = cpu_to_le32(dosattrs);
+	cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile);
+	tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
+				 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
+				 CREATE_NOT_FILE, ACL_NO_MODE,
+				 &data, SMB2_OP_SET_INFO, cfile, NULL, NULL, NULL, NULL);
+	if (tmprc == 0)
+		cifs_i->cifsAttrs = dosattrs;
+}
+
+int
+smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
+	   struct cifs_sb_info *cifs_sb)
+{
+	drop_cached_dir_by_name(xid, tcon, name, cifs_sb);
+	return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
+				CREATE_NOT_FILE, ACL_NO_MODE,
+				NULL, SMB2_OP_RMDIR, NULL, NULL, NULL, NULL, NULL);
+}
+
+int
+smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
+	    struct cifs_sb_info *cifs_sb)
+{
+	return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
+				CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
+				ACL_NO_MODE, NULL, SMB2_OP_DELETE, NULL, NULL, NULL, NULL, NULL);
+}
+
+static int
+smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
+		   const char *from_name, const char *to_name,
+		   struct cifs_sb_info *cifs_sb, __u32 access, int command,
+		   struct cifsFileInfo *cfile)
+{
+	__le16 *smb2_to_name = NULL;
+	int rc;
+
+	smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
+	if (smb2_to_name == NULL) {
+		rc = -ENOMEM;
+		goto smb2_rename_path;
+	}
+	rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
+			      FILE_OPEN, 0, ACL_NO_MODE, smb2_to_name,
+			      command, cfile, NULL, NULL, NULL, NULL);
+smb2_rename_path:
+	kfree(smb2_to_name);
+	return rc;
+}
+
+int
+smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
+		 const char *from_name, const char *to_name,
+		 struct cifs_sb_info *cifs_sb)
+{
+	struct cifsFileInfo *cfile;
+
+	drop_cached_dir_by_name(xid, tcon, from_name, cifs_sb);
+	cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile);
+
+	return smb2_set_path_attr(xid, tcon, from_name, to_name,
+				  cifs_sb, DELETE, SMB2_OP_RENAME, cfile);
+}
+
+int
+smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
+		     const char *from_name, const char *to_name,
+		     struct cifs_sb_info *cifs_sb)
+{
+	return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
+				  FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK,
+				  NULL);
+}
+
+int
+smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
+		   const char *full_path, __u64 size,
+		   struct cifs_sb_info *cifs_sb, bool set_alloc)
+{
+	__le64 eof = cpu_to_le64(size);
+	struct cifsFileInfo *cfile;
+
+	cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
+	return smb2_compound_op(xid, tcon, cifs_sb, full_path,
+				FILE_WRITE_DATA, FILE_OPEN, 0, ACL_NO_MODE,
+				&eof, SMB2_OP_SET_EOF, cfile, NULL, NULL, NULL, NULL);
+}
+
+int
+smb2_set_file_info(struct inode *inode, const char *full_path,
+		   FILE_BASIC_INFO *buf, const unsigned int xid)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct tcon_link *tlink;
+	struct cifs_tcon *tcon;
+	struct cifsFileInfo *cfile;
+	int rc;
+
+	if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
+	    (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
+	    (buf->Attributes == 0))
+		return 0; /* would be a no op, no sense sending this */
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+	tcon = tlink_tcon(tlink);
+
+	cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
+	rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
+			      FILE_WRITE_ATTRIBUTES, FILE_OPEN,
+			      0, ACL_NO_MODE, buf, SMB2_OP_SET_INFO, cfile,
+			      NULL, NULL, NULL, NULL);
+	cifs_put_tlink(tlink);
+	return rc;
+}
diff --git a/fs/smb/client/smb2maperror.c b/fs/smb/client/smb2maperror.c
new file mode 100644
index 0000000000..1a90dd78b2
--- /dev/null
+++ b/fs/smb/client/smb2maperror.c
@@ -0,0 +1,2479 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *
+ *   Functions which do error mapping of SMB2 status codes to POSIX errors
+ *
+ *   Copyright (C) International Business Machines  Corp., 2009
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ */
+#include <linux/errno.h>
+#include "cifsglob.h"
+#include "cifs_debug.h"
+#include "smb2pdu.h"
+#include "smb2proto.h"
+#include "smb2status.h"
+#include "smb2glob.h"
+#include "trace.h"
+
+struct status_to_posix_error {
+	__le32 smb2_status;
+	int posix_error;
+	char *status_string;
+};
+
+static const struct status_to_posix_error smb2_error_map_table[] = {
+	{STATUS_SUCCESS, 0, "STATUS_SUCCESS"},
+	{STATUS_WAIT_0,  0, "STATUS_WAIT_0"},
+	{STATUS_WAIT_1, -EIO, "STATUS_WAIT_1"},
+	{STATUS_WAIT_2, -EIO, "STATUS_WAIT_2"},
+	{STATUS_WAIT_3, -EIO, "STATUS_WAIT_3"},
+	{STATUS_WAIT_63, -EIO, "STATUS_WAIT_63"},
+	{STATUS_ABANDONED, -EIO, "STATUS_ABANDONED"},
+	{STATUS_ABANDONED_WAIT_0, -EIO, "STATUS_ABANDONED_WAIT_0"},
+	{STATUS_ABANDONED_WAIT_63, -EIO, "STATUS_ABANDONED_WAIT_63"},
+	{STATUS_USER_APC, -EIO, "STATUS_USER_APC"},
+	{STATUS_KERNEL_APC, -EIO, "STATUS_KERNEL_APC"},
+	{STATUS_ALERTED, -EIO, "STATUS_ALERTED"},
+	{STATUS_TIMEOUT, -ETIMEDOUT, "STATUS_TIMEOUT"},
+	{STATUS_PENDING, -EIO, "STATUS_PENDING"},
+	{STATUS_REPARSE, -EIO, "STATUS_REPARSE"},
+	{STATUS_MORE_ENTRIES, -EIO, "STATUS_MORE_ENTRIES"},
+	{STATUS_NOT_ALL_ASSIGNED, -EIO, "STATUS_NOT_ALL_ASSIGNED"},
+	{STATUS_SOME_NOT_MAPPED, -EIO, "STATUS_SOME_NOT_MAPPED"},
+	{STATUS_OPLOCK_BREAK_IN_PROGRESS, -EIO,
+	"STATUS_OPLOCK_BREAK_IN_PROGRESS"},
+	{STATUS_VOLUME_MOUNTED, -EIO, "STATUS_VOLUME_MOUNTED"},
+	{STATUS_RXACT_COMMITTED, -EIO, "STATUS_RXACT_COMMITTED"},
+	{STATUS_NOTIFY_CLEANUP, -EIO, "STATUS_NOTIFY_CLEANUP"},
+	{STATUS_NOTIFY_ENUM_DIR, -EIO, "STATUS_NOTIFY_ENUM_DIR"},
+	{STATUS_NO_QUOTAS_FOR_ACCOUNT, -EIO, "STATUS_NO_QUOTAS_FOR_ACCOUNT"},
+	{STATUS_PRIMARY_TRANSPORT_CONNECT_FAILED, -EIO,
+	"STATUS_PRIMARY_TRANSPORT_CONNECT_FAILED"},
+	{STATUS_PAGE_FAULT_TRANSITION, -EIO, "STATUS_PAGE_FAULT_TRANSITION"},
+	{STATUS_PAGE_FAULT_DEMAND_ZERO, -EIO, "STATUS_PAGE_FAULT_DEMAND_ZERO"},
+	{STATUS_PAGE_FAULT_COPY_ON_WRITE, -EIO,
+	"STATUS_PAGE_FAULT_COPY_ON_WRITE"},
+	{STATUS_PAGE_FAULT_GUARD_PAGE, -EIO, "STATUS_PAGE_FAULT_GUARD_PAGE"},
+	{STATUS_PAGE_FAULT_PAGING_FILE, -EIO, "STATUS_PAGE_FAULT_PAGING_FILE"},
+	{STATUS_CACHE_PAGE_LOCKED, -EIO, "STATUS_CACHE_PAGE_LOCKED"},
+	{STATUS_CRASH_DUMP, -EIO, "STATUS_CRASH_DUMP"},
+	{STATUS_BUFFER_ALL_ZEROS, -EIO, "STATUS_BUFFER_ALL_ZEROS"},
+	{STATUS_REPARSE_OBJECT, -EIO, "STATUS_REPARSE_OBJECT"},
+	{STATUS_RESOURCE_REQUIREMENTS_CHANGED, -EIO,
+	"STATUS_RESOURCE_REQUIREMENTS_CHANGED"},
+	{STATUS_TRANSLATION_COMPLETE, -EIO, "STATUS_TRANSLATION_COMPLETE"},
+	{STATUS_DS_MEMBERSHIP_EVALUATED_LOCALLY, -EIO,
+	"STATUS_DS_MEMBERSHIP_EVALUATED_LOCALLY"},
+	{STATUS_NOTHING_TO_TERMINATE, -EIO, "STATUS_NOTHING_TO_TERMINATE"},
+	{STATUS_PROCESS_NOT_IN_JOB, -EIO, "STATUS_PROCESS_NOT_IN_JOB"},
+	{STATUS_PROCESS_IN_JOB, -EIO, "STATUS_PROCESS_IN_JOB"},
+	{STATUS_VOLSNAP_HIBERNATE_READY, -EIO,
+	"STATUS_VOLSNAP_HIBERNATE_READY"},
+	{STATUS_FSFILTER_OP_COMPLETED_SUCCESSFULLY, -EIO,
+	"STATUS_FSFILTER_OP_COMPLETED_SUCCESSFULLY"},
+	{STATUS_INTERRUPT_VECTOR_ALREADY_CONNECTED, -EIO,
+	"STATUS_INTERRUPT_VECTOR_ALREADY_CONNECTED"},
+	{STATUS_INTERRUPT_STILL_CONNECTED, -EIO,
+	"STATUS_INTERRUPT_STILL_CONNECTED"},
+	{STATUS_PROCESS_CLONED, -EIO, "STATUS_PROCESS_CLONED"},
+	{STATUS_FILE_LOCKED_WITH_ONLY_READERS, -EIO,
+	"STATUS_FILE_LOCKED_WITH_ONLY_READERS"},
+	{STATUS_FILE_LOCKED_WITH_WRITERS, -EIO,
+	"STATUS_FILE_LOCKED_WITH_WRITERS"},
+	{STATUS_RESOURCEMANAGER_READ_ONLY, -EROFS,
+	"STATUS_RESOURCEMANAGER_READ_ONLY"},
+	{STATUS_WAIT_FOR_OPLOCK, -EIO, "STATUS_WAIT_FOR_OPLOCK"},
+	{DBG_EXCEPTION_HANDLED, -EIO, "DBG_EXCEPTION_HANDLED"},
+	{DBG_CONTINUE, -EIO, "DBG_CONTINUE"},
+	{STATUS_FLT_IO_COMPLETE, -EIO, "STATUS_FLT_IO_COMPLETE"},
+	{STATUS_OBJECT_NAME_EXISTS, -EIO, "STATUS_OBJECT_NAME_EXISTS"},
+	{STATUS_THREAD_WAS_SUSPENDED, -EIO, "STATUS_THREAD_WAS_SUSPENDED"},
+	{STATUS_WORKING_SET_LIMIT_RANGE, -EIO,
+	"STATUS_WORKING_SET_LIMIT_RANGE"},
+	{STATUS_IMAGE_NOT_AT_BASE, -EIO, "STATUS_IMAGE_NOT_AT_BASE"},
+	{STATUS_RXACT_STATE_CREATED, -EIO, "STATUS_RXACT_STATE_CREATED"},
+	{STATUS_SEGMENT_NOTIFICATION, -EIO, "STATUS_SEGMENT_NOTIFICATION"},
+	{STATUS_LOCAL_USER_SESSION_KEY, -EIO, "STATUS_LOCAL_USER_SESSION_KEY"},
+	{STATUS_BAD_CURRENT_DIRECTORY, -EIO, "STATUS_BAD_CURRENT_DIRECTORY"},
+	{STATUS_SERIAL_MORE_WRITES, -EIO, "STATUS_SERIAL_MORE_WRITES"},
+	{STATUS_REGISTRY_RECOVERED, -EIO, "STATUS_REGISTRY_RECOVERED"},
+	{STATUS_FT_READ_RECOVERY_FROM_BACKUP, -EIO,
+	"STATUS_FT_READ_RECOVERY_FROM_BACKUP"},
+	{STATUS_FT_WRITE_RECOVERY, -EIO, "STATUS_FT_WRITE_RECOVERY"},
+	{STATUS_SERIAL_COUNTER_TIMEOUT, -ETIMEDOUT,
+	"STATUS_SERIAL_COUNTER_TIMEOUT"},
+	{STATUS_NULL_LM_PASSWORD, -EIO, "STATUS_NULL_LM_PASSWORD"},
+	{STATUS_IMAGE_MACHINE_TYPE_MISMATCH, -EIO,
+	"STATUS_IMAGE_MACHINE_TYPE_MISMATCH"},
+	{STATUS_RECEIVE_PARTIAL, -EIO, "STATUS_RECEIVE_PARTIAL"},
+	{STATUS_RECEIVE_EXPEDITED, -EIO, "STATUS_RECEIVE_EXPEDITED"},
+	{STATUS_RECEIVE_PARTIAL_EXPEDITED, -EIO,
+	"STATUS_RECEIVE_PARTIAL_EXPEDITED"},
+	{STATUS_EVENT_DONE, -EIO, "STATUS_EVENT_DONE"},
+	{STATUS_EVENT_PENDING, -EIO, "STATUS_EVENT_PENDING"},
+	{STATUS_CHECKING_FILE_SYSTEM, -EIO, "STATUS_CHECKING_FILE_SYSTEM"},
+	{STATUS_FATAL_APP_EXIT, -EIO, "STATUS_FATAL_APP_EXIT"},
+	{STATUS_PREDEFINED_HANDLE, -EIO, "STATUS_PREDEFINED_HANDLE"},
+	{STATUS_WAS_UNLOCKED, -EIO, "STATUS_WAS_UNLOCKED"},
+	{STATUS_SERVICE_NOTIFICATION, -EIO, "STATUS_SERVICE_NOTIFICATION"},
+	{STATUS_WAS_LOCKED, -EIO, "STATUS_WAS_LOCKED"},
+	{STATUS_LOG_HARD_ERROR, -EIO, "STATUS_LOG_HARD_ERROR"},
+	{STATUS_ALREADY_WIN32, -EIO, "STATUS_ALREADY_WIN32"},
+	{STATUS_WX86_UNSIMULATE, -EIO, "STATUS_WX86_UNSIMULATE"},
+	{STATUS_WX86_CONTINUE, -EIO, "STATUS_WX86_CONTINUE"},
+	{STATUS_WX86_SINGLE_STEP, -EIO, "STATUS_WX86_SINGLE_STEP"},
+	{STATUS_WX86_BREAKPOINT, -EIO, "STATUS_WX86_BREAKPOINT"},
+	{STATUS_WX86_EXCEPTION_CONTINUE, -EIO,
+	"STATUS_WX86_EXCEPTION_CONTINUE"},
+	{STATUS_WX86_EXCEPTION_LASTCHANCE, -EIO,
+	"STATUS_WX86_EXCEPTION_LASTCHANCE"},
+	{STATUS_WX86_EXCEPTION_CHAIN, -EIO, "STATUS_WX86_EXCEPTION_CHAIN"},
+	{STATUS_IMAGE_MACHINE_TYPE_MISMATCH_EXE, -EIO,
+	"STATUS_IMAGE_MACHINE_TYPE_MISMATCH_EXE"},
+	{STATUS_NO_YIELD_PERFORMED, -EIO, "STATUS_NO_YIELD_PERFORMED"},
+	{STATUS_TIMER_RESUME_IGNORED, -EIO, "STATUS_TIMER_RESUME_IGNORED"},
+	{STATUS_ARBITRATION_UNHANDLED, -EIO, "STATUS_ARBITRATION_UNHANDLED"},
+	{STATUS_CARDBUS_NOT_SUPPORTED, -ENOSYS, "STATUS_CARDBUS_NOT_SUPPORTED"},
+	{STATUS_WX86_CREATEWX86TIB, -EIO, "STATUS_WX86_CREATEWX86TIB"},
+	{STATUS_MP_PROCESSOR_MISMATCH, -EIO, "STATUS_MP_PROCESSOR_MISMATCH"},
+	{STATUS_HIBERNATED, -EIO, "STATUS_HIBERNATED"},
+	{STATUS_RESUME_HIBERNATION, -EIO, "STATUS_RESUME_HIBERNATION"},
+	{STATUS_FIRMWARE_UPDATED, -EIO, "STATUS_FIRMWARE_UPDATED"},
+	{STATUS_DRIVERS_LEAKING_LOCKED_PAGES, -EIO,
+	"STATUS_DRIVERS_LEAKING_LOCKED_PAGES"},
+	{STATUS_MESSAGE_RETRIEVED, -EIO, "STATUS_MESSAGE_RETRIEVED"},
+	{STATUS_SYSTEM_POWERSTATE_TRANSITION, -EIO,
+	"STATUS_SYSTEM_POWERSTATE_TRANSITION"},
+	{STATUS_ALPC_CHECK_COMPLETION_LIST, -EIO,
+	"STATUS_ALPC_CHECK_COMPLETION_LIST"},
+	{STATUS_SYSTEM_POWERSTATE_COMPLEX_TRANSITION, -EIO,
+	"STATUS_SYSTEM_POWERSTATE_COMPLEX_TRANSITION"},
+	{STATUS_ACCESS_AUDIT_BY_POLICY, -EIO, "STATUS_ACCESS_AUDIT_BY_POLICY"},
+	{STATUS_ABANDON_HIBERFILE, -EIO, "STATUS_ABANDON_HIBERFILE"},
+	{STATUS_BIZRULES_NOT_ENABLED, -EIO, "STATUS_BIZRULES_NOT_ENABLED"},
+	{STATUS_WAKE_SYSTEM, -EIO, "STATUS_WAKE_SYSTEM"},
+	{STATUS_DS_SHUTTING_DOWN, -EIO, "STATUS_DS_SHUTTING_DOWN"},
+	{DBG_REPLY_LATER, -EIO, "DBG_REPLY_LATER"},
+	{DBG_UNABLE_TO_PROVIDE_HANDLE, -EIO, "DBG_UNABLE_TO_PROVIDE_HANDLE"},
+	{DBG_TERMINATE_THREAD, -EIO, "DBG_TERMINATE_THREAD"},
+	{DBG_TERMINATE_PROCESS, -EIO, "DBG_TERMINATE_PROCESS"},
+	{DBG_CONTROL_C, -EIO, "DBG_CONTROL_C"},
+	{DBG_PRINTEXCEPTION_C, -EIO, "DBG_PRINTEXCEPTION_C"},
+	{DBG_RIPEXCEPTION, -EIO, "DBG_RIPEXCEPTION"},
+	{DBG_CONTROL_BREAK, -EIO, "DBG_CONTROL_BREAK"},
+	{DBG_COMMAND_EXCEPTION, -EIO, "DBG_COMMAND_EXCEPTION"},
+	{RPC_NT_UUID_LOCAL_ONLY, -EIO, "RPC_NT_UUID_LOCAL_ONLY"},
+	{RPC_NT_SEND_INCOMPLETE, -EIO, "RPC_NT_SEND_INCOMPLETE"},
+	{STATUS_CTX_CDM_CONNECT, -EIO, "STATUS_CTX_CDM_CONNECT"},
+	{STATUS_CTX_CDM_DISCONNECT, -EIO, "STATUS_CTX_CDM_DISCONNECT"},
+	{STATUS_SXS_RELEASE_ACTIVATION_CONTEXT, -EIO,
+	"STATUS_SXS_RELEASE_ACTIVATION_CONTEXT"},
+	{STATUS_RECOVERY_NOT_NEEDED, -EIO, "STATUS_RECOVERY_NOT_NEEDED"},
+	{STATUS_RM_ALREADY_STARTED, -EIO, "STATUS_RM_ALREADY_STARTED"},
+	{STATUS_LOG_NO_RESTART, -EIO, "STATUS_LOG_NO_RESTART"},
+	{STATUS_VIDEO_DRIVER_DEBUG_REPORT_REQUEST, -EIO,
+	"STATUS_VIDEO_DRIVER_DEBUG_REPORT_REQUEST"},
+	{STATUS_GRAPHICS_PARTIAL_DATA_POPULATED, -EIO,
+	"STATUS_GRAPHICS_PARTIAL_DATA_POPULATED"},
+	{STATUS_GRAPHICS_DRIVER_MISMATCH, -EIO,
+	"STATUS_GRAPHICS_DRIVER_MISMATCH"},
+	{STATUS_GRAPHICS_MODE_NOT_PINNED, -EIO,
+	"STATUS_GRAPHICS_MODE_NOT_PINNED"},
+	{STATUS_GRAPHICS_NO_PREFERRED_MODE, -EIO,
+	"STATUS_GRAPHICS_NO_PREFERRED_MODE"},
+	{STATUS_GRAPHICS_DATASET_IS_EMPTY, -EIO,
+	"STATUS_GRAPHICS_DATASET_IS_EMPTY"},
+	{STATUS_GRAPHICS_NO_MORE_ELEMENTS_IN_DATASET, -EIO,
+	"STATUS_GRAPHICS_NO_MORE_ELEMENTS_IN_DATASET"},
+	{STATUS_GRAPHICS_PATH_CONTENT_GEOMETRY_TRANSFORMATION_NOT_PINNED, -EIO,
+	"STATUS_GRAPHICS_PATH_CONTENT_GEOMETRY_TRANSFORMATION_NOT_PINNED"},
+	{STATUS_GRAPHICS_UNKNOWN_CHILD_STATUS, -EIO,
+	"STATUS_GRAPHICS_UNKNOWN_CHILD_STATUS"},
+	{STATUS_GRAPHICS_LEADLINK_START_DEFERRED, -EIO,
+	"STATUS_GRAPHICS_LEADLINK_START_DEFERRED"},
+	{STATUS_GRAPHICS_POLLING_TOO_FREQUENTLY, -EIO,
+	"STATUS_GRAPHICS_POLLING_TOO_FREQUENTLY"},
+	{STATUS_GRAPHICS_START_DEFERRED, -EIO,
+	"STATUS_GRAPHICS_START_DEFERRED"},
+	{STATUS_NDIS_INDICATION_REQUIRED, -EIO,
+	"STATUS_NDIS_INDICATION_REQUIRED"},
+	{STATUS_GUARD_PAGE_VIOLATION, -EIO, "STATUS_GUARD_PAGE_VIOLATION"},
+	{STATUS_DATATYPE_MISALIGNMENT, -EIO, "STATUS_DATATYPE_MISALIGNMENT"},
+	{STATUS_BREAKPOINT, -EIO, "STATUS_BREAKPOINT"},
+	{STATUS_SINGLE_STEP, -EIO, "STATUS_SINGLE_STEP"},
+	{STATUS_BUFFER_OVERFLOW, -E2BIG, "STATUS_BUFFER_OVERFLOW"},
+	{STATUS_NO_MORE_FILES, -ENODATA, "STATUS_NO_MORE_FILES"},
+	{STATUS_WAKE_SYSTEM_DEBUGGER, -EIO, "STATUS_WAKE_SYSTEM_DEBUGGER"},
+	{STATUS_HANDLES_CLOSED, -EIO, "STATUS_HANDLES_CLOSED"},
+	{STATUS_NO_INHERITANCE, -EIO, "STATUS_NO_INHERITANCE"},
+	{STATUS_GUID_SUBSTITUTION_MADE, -EIO, "STATUS_GUID_SUBSTITUTION_MADE"},
+	{STATUS_PARTIAL_COPY, -EIO, "STATUS_PARTIAL_COPY"},
+	{STATUS_DEVICE_PAPER_EMPTY, -EIO, "STATUS_DEVICE_PAPER_EMPTY"},
+	{STATUS_DEVICE_POWERED_OFF, -EIO, "STATUS_DEVICE_POWERED_OFF"},
+	{STATUS_DEVICE_OFF_LINE, -EIO, "STATUS_DEVICE_OFF_LINE"},
+	{STATUS_DEVICE_BUSY, -EBUSY, "STATUS_DEVICE_BUSY"},
+	{STATUS_NO_MORE_EAS, -EIO, "STATUS_NO_MORE_EAS"},
+	{STATUS_INVALID_EA_NAME, -EINVAL, "STATUS_INVALID_EA_NAME"},
+	{STATUS_EA_LIST_INCONSISTENT, -EIO, "STATUS_EA_LIST_INCONSISTENT"},
+	{STATUS_INVALID_EA_FLAG, -EINVAL, "STATUS_INVALID_EA_FLAG"},
+	{STATUS_VERIFY_REQUIRED, -EIO, "STATUS_VERIFY_REQUIRED"},
+	{STATUS_EXTRANEOUS_INFORMATION, -EIO, "STATUS_EXTRANEOUS_INFORMATION"},
+	{STATUS_RXACT_COMMIT_NECESSARY, -EIO, "STATUS_RXACT_COMMIT_NECESSARY"},
+	{STATUS_NO_MORE_ENTRIES, -EIO, "STATUS_NO_MORE_ENTRIES"},
+	{STATUS_FILEMARK_DETECTED, -EIO, "STATUS_FILEMARK_DETECTED"},
+	{STATUS_MEDIA_CHANGED, -EIO, "STATUS_MEDIA_CHANGED"},
+	{STATUS_BUS_RESET, -EIO, "STATUS_BUS_RESET"},
+	{STATUS_END_OF_MEDIA, -EIO, "STATUS_END_OF_MEDIA"},
+	{STATUS_BEGINNING_OF_MEDIA, -EIO, "STATUS_BEGINNING_OF_MEDIA"},
+	{STATUS_MEDIA_CHECK, -EIO, "STATUS_MEDIA_CHECK"},
+	{STATUS_SETMARK_DETECTED, -EIO, "STATUS_SETMARK_DETECTED"},
+	{STATUS_NO_DATA_DETECTED, -EIO, "STATUS_NO_DATA_DETECTED"},
+	{STATUS_REDIRECTOR_HAS_OPEN_HANDLES, -EIO,
+	"STATUS_REDIRECTOR_HAS_OPEN_HANDLES"},
+	{STATUS_SERVER_HAS_OPEN_HANDLES, -EIO,
+	"STATUS_SERVER_HAS_OPEN_HANDLES"},
+	{STATUS_ALREADY_DISCONNECTED, -EIO, "STATUS_ALREADY_DISCONNECTED"},
+	{STATUS_LONGJUMP, -EIO, "STATUS_LONGJUMP"},
+	{STATUS_CLEANER_CARTRIDGE_INSTALLED, -EIO,
+	"STATUS_CLEANER_CARTRIDGE_INSTALLED"},
+	{STATUS_PLUGPLAY_QUERY_VETOED, -EIO, "STATUS_PLUGPLAY_QUERY_VETOED"},
+	{STATUS_UNWIND_CONSOLIDATE, -EIO, "STATUS_UNWIND_CONSOLIDATE"},
+	{STATUS_REGISTRY_HIVE_RECOVERED, -EIO,
+	"STATUS_REGISTRY_HIVE_RECOVERED"},
+	{STATUS_DLL_MIGHT_BE_INSECURE, -EIO, "STATUS_DLL_MIGHT_BE_INSECURE"},
+	{STATUS_DLL_MIGHT_BE_INCOMPATIBLE, -EIO,
+	"STATUS_DLL_MIGHT_BE_INCOMPATIBLE"},
+	{STATUS_STOPPED_ON_SYMLINK, -EOPNOTSUPP, "STATUS_STOPPED_ON_SYMLINK"},
+	{STATUS_IO_REPARSE_TAG_NOT_HANDLED, -EOPNOTSUPP,
+	"STATUS_REPARSE_NOT_HANDLED"},
+	{STATUS_DEVICE_REQUIRES_CLEANING, -EIO,
+	"STATUS_DEVICE_REQUIRES_CLEANING"},
+	{STATUS_DEVICE_DOOR_OPEN, -EIO, "STATUS_DEVICE_DOOR_OPEN"},
+	{STATUS_DATA_LOST_REPAIR, -EIO, "STATUS_DATA_LOST_REPAIR"},
+	{DBG_EXCEPTION_NOT_HANDLED, -EIO, "DBG_EXCEPTION_NOT_HANDLED"},
+	{STATUS_CLUSTER_NODE_ALREADY_UP, -EIO,
+	"STATUS_CLUSTER_NODE_ALREADY_UP"},
+	{STATUS_CLUSTER_NODE_ALREADY_DOWN, -EIO,
+	"STATUS_CLUSTER_NODE_ALREADY_DOWN"},
+	{STATUS_CLUSTER_NETWORK_ALREADY_ONLINE, -EIO,
+	"STATUS_CLUSTER_NETWORK_ALREADY_ONLINE"},
+	{STATUS_CLUSTER_NETWORK_ALREADY_OFFLINE, -EIO,
+	"STATUS_CLUSTER_NETWORK_ALREADY_OFFLINE"},
+	{STATUS_CLUSTER_NODE_ALREADY_MEMBER, -EIO,
+	"STATUS_CLUSTER_NODE_ALREADY_MEMBER"},
+	{STATUS_COULD_NOT_RESIZE_LOG, -EIO, "STATUS_COULD_NOT_RESIZE_LOG"},
+	{STATUS_NO_TXF_METADATA, -EIO, "STATUS_NO_TXF_METADATA"},
+	{STATUS_CANT_RECOVER_WITH_HANDLE_OPEN, -EIO,
+	"STATUS_CANT_RECOVER_WITH_HANDLE_OPEN"},
+	{STATUS_TXF_METADATA_ALREADY_PRESENT, -EIO,
+	"STATUS_TXF_METADATA_ALREADY_PRESENT"},
+	{STATUS_TRANSACTION_SCOPE_CALLBACKS_NOT_SET, -EIO,
+	"STATUS_TRANSACTION_SCOPE_CALLBACKS_NOT_SET"},
+	{STATUS_VIDEO_HUNG_DISPLAY_DRIVER_THREAD_RECOVERED, -EIO,
+	"STATUS_VIDEO_HUNG_DISPLAY_DRIVER_THREAD_RECOVERED"},
+	{STATUS_FLT_BUFFER_TOO_SMALL, -ENOBUFS, "STATUS_FLT_BUFFER_TOO_SMALL"},
+	{STATUS_FVE_PARTIAL_METADATA, -EIO, "STATUS_FVE_PARTIAL_METADATA"},
+	{STATUS_UNSUCCESSFUL, -EIO, "STATUS_UNSUCCESSFUL"},
+	{STATUS_NOT_IMPLEMENTED, -EOPNOTSUPP, "STATUS_NOT_IMPLEMENTED"},
+	{STATUS_INVALID_INFO_CLASS, -EIO, "STATUS_INVALID_INFO_CLASS"},
+	{STATUS_INFO_LENGTH_MISMATCH, -EIO, "STATUS_INFO_LENGTH_MISMATCH"},
+	{STATUS_ACCESS_VIOLATION, -EACCES, "STATUS_ACCESS_VIOLATION"},
+	{STATUS_IN_PAGE_ERROR, -EFAULT, "STATUS_IN_PAGE_ERROR"},
+	{STATUS_PAGEFILE_QUOTA, -EDQUOT, "STATUS_PAGEFILE_QUOTA"},
+	{STATUS_INVALID_HANDLE, -EBADF, "STATUS_INVALID_HANDLE"},
+	{STATUS_BAD_INITIAL_STACK, -EIO, "STATUS_BAD_INITIAL_STACK"},
+	{STATUS_BAD_INITIAL_PC, -EIO, "STATUS_BAD_INITIAL_PC"},
+	{STATUS_INVALID_CID, -EIO, "STATUS_INVALID_CID"},
+	{STATUS_TIMER_NOT_CANCELED, -EIO, "STATUS_TIMER_NOT_CANCELED"},
+	{STATUS_INVALID_PARAMETER, -EINVAL, "STATUS_INVALID_PARAMETER"},
+	{STATUS_NO_SUCH_DEVICE, -ENODEV, "STATUS_NO_SUCH_DEVICE"},
+	{STATUS_NO_SUCH_FILE, -ENOENT, "STATUS_NO_SUCH_FILE"},
+	{STATUS_INVALID_DEVICE_REQUEST, -EOPNOTSUPP, "STATUS_INVALID_DEVICE_REQUEST"},
+	{STATUS_END_OF_FILE, -ENODATA, "STATUS_END_OF_FILE"},
+	{STATUS_WRONG_VOLUME, -EIO, "STATUS_WRONG_VOLUME"},
+	{STATUS_NO_MEDIA_IN_DEVICE, -EIO, "STATUS_NO_MEDIA_IN_DEVICE"},
+	{STATUS_UNRECOGNIZED_MEDIA, -EIO, "STATUS_UNRECOGNIZED_MEDIA"},
+	{STATUS_NONEXISTENT_SECTOR, -EIO, "STATUS_NONEXISTENT_SECTOR"},
+	{STATUS_MORE_PROCESSING_REQUIRED, -EIO,
+	"STATUS_MORE_PROCESSING_REQUIRED"},
+	{STATUS_NO_MEMORY, -EREMOTEIO, "STATUS_NO_MEMORY"},
+	{STATUS_CONFLICTING_ADDRESSES, -EADDRINUSE,
+	"STATUS_CONFLICTING_ADDRESSES"},
+	{STATUS_NOT_MAPPED_VIEW, -EIO, "STATUS_NOT_MAPPED_VIEW"},
+	{STATUS_UNABLE_TO_FREE_VM, -EIO, "STATUS_UNABLE_TO_FREE_VM"},
+	{STATUS_UNABLE_TO_DELETE_SECTION, -EIO,
+	"STATUS_UNABLE_TO_DELETE_SECTION"},
+	{STATUS_INVALID_SYSTEM_SERVICE, -EIO, "STATUS_INVALID_SYSTEM_SERVICE"},
+	{STATUS_ILLEGAL_INSTRUCTION, -EIO, "STATUS_ILLEGAL_INSTRUCTION"},
+	{STATUS_INVALID_LOCK_SEQUENCE, -EIO, "STATUS_INVALID_LOCK_SEQUENCE"},
+	{STATUS_INVALID_VIEW_SIZE, -EIO, "STATUS_INVALID_VIEW_SIZE"},
+	{STATUS_INVALID_FILE_FOR_SECTION, -EIO,
+	"STATUS_INVALID_FILE_FOR_SECTION"},
+	{STATUS_ALREADY_COMMITTED, -EIO, "STATUS_ALREADY_COMMITTED"},
+	{STATUS_ACCESS_DENIED, -EACCES, "STATUS_ACCESS_DENIED"},
+	{STATUS_BUFFER_TOO_SMALL, -EIO, "STATUS_BUFFER_TOO_SMALL"},
+	{STATUS_OBJECT_TYPE_MISMATCH, -EIO, "STATUS_OBJECT_TYPE_MISMATCH"},
+	{STATUS_NONCONTINUABLE_EXCEPTION, -EIO,
+	"STATUS_NONCONTINUABLE_EXCEPTION"},
+	{STATUS_INVALID_DISPOSITION, -EIO, "STATUS_INVALID_DISPOSITION"},
+	{STATUS_UNWIND, -EIO, "STATUS_UNWIND"},
+	{STATUS_BAD_STACK, -EIO, "STATUS_BAD_STACK"},
+	{STATUS_INVALID_UNWIND_TARGET, -EIO, "STATUS_INVALID_UNWIND_TARGET"},
+	{STATUS_NOT_LOCKED, -EIO, "STATUS_NOT_LOCKED"},
+	{STATUS_PARITY_ERROR, -EIO, "STATUS_PARITY_ERROR"},
+	{STATUS_UNABLE_TO_DECOMMIT_VM, -EIO, "STATUS_UNABLE_TO_DECOMMIT_VM"},
+	{STATUS_NOT_COMMITTED, -EIO, "STATUS_NOT_COMMITTED"},
+	{STATUS_INVALID_PORT_ATTRIBUTES, -EIO,
+	"STATUS_INVALID_PORT_ATTRIBUTES"},
+	{STATUS_PORT_MESSAGE_TOO_LONG, -EIO, "STATUS_PORT_MESSAGE_TOO_LONG"},
+	{STATUS_INVALID_PARAMETER_MIX, -EINVAL, "STATUS_INVALID_PARAMETER_MIX"},
+	{STATUS_INVALID_QUOTA_LOWER, -EIO, "STATUS_INVALID_QUOTA_LOWER"},
+	{STATUS_DISK_CORRUPT_ERROR, -EIO, "STATUS_DISK_CORRUPT_ERROR"},
+	{STATUS_OBJECT_NAME_INVALID, -ENOENT, "STATUS_OBJECT_NAME_INVALID"},
+	{STATUS_OBJECT_NAME_NOT_FOUND, -ENOENT, "STATUS_OBJECT_NAME_NOT_FOUND"},
+	{STATUS_OBJECT_NAME_COLLISION, -EEXIST, "STATUS_OBJECT_NAME_COLLISION"},
+	{STATUS_PORT_DISCONNECTED, -EIO, "STATUS_PORT_DISCONNECTED"},
+	{STATUS_DEVICE_ALREADY_ATTACHED, -EIO,
+	"STATUS_DEVICE_ALREADY_ATTACHED"},
+	{STATUS_OBJECT_PATH_INVALID, -ENOTDIR, "STATUS_OBJECT_PATH_INVALID"},
+	{STATUS_OBJECT_PATH_NOT_FOUND, -ENOENT, "STATUS_OBJECT_PATH_NOT_FOUND"},
+	{STATUS_OBJECT_PATH_SYNTAX_BAD, -EIO, "STATUS_OBJECT_PATH_SYNTAX_BAD"},
+	{STATUS_DATA_OVERRUN, -EIO, "STATUS_DATA_OVERRUN"},
+	{STATUS_DATA_LATE_ERROR, -EIO, "STATUS_DATA_LATE_ERROR"},
+	{STATUS_DATA_ERROR, -EIO, "STATUS_DATA_ERROR"},
+	{STATUS_CRC_ERROR, -EIO, "STATUS_CRC_ERROR"},
+	{STATUS_SECTION_TOO_BIG, -EIO, "STATUS_SECTION_TOO_BIG"},
+	{STATUS_PORT_CONNECTION_REFUSED, -ECONNREFUSED,
+	"STATUS_PORT_CONNECTION_REFUSED"},
+	{STATUS_INVALID_PORT_HANDLE, -EIO, "STATUS_INVALID_PORT_HANDLE"},
+	{STATUS_SHARING_VIOLATION, -EBUSY, "STATUS_SHARING_VIOLATION"},
+	{STATUS_QUOTA_EXCEEDED, -EDQUOT, "STATUS_QUOTA_EXCEEDED"},
+	{STATUS_INVALID_PAGE_PROTECTION, -EIO,
+	"STATUS_INVALID_PAGE_PROTECTION"},
+	{STATUS_MUTANT_NOT_OWNED, -EIO, "STATUS_MUTANT_NOT_OWNED"},
+	{STATUS_SEMAPHORE_LIMIT_EXCEEDED, -EIO,
+	"STATUS_SEMAPHORE_LIMIT_EXCEEDED"},
+	{STATUS_PORT_ALREADY_SET, -EIO, "STATUS_PORT_ALREADY_SET"},
+	{STATUS_SECTION_NOT_IMAGE, -EIO, "STATUS_SECTION_NOT_IMAGE"},
+	{STATUS_SUSPEND_COUNT_EXCEEDED, -EIO, "STATUS_SUSPEND_COUNT_EXCEEDED"},
+	{STATUS_THREAD_IS_TERMINATING, -EIO, "STATUS_THREAD_IS_TERMINATING"},
+	{STATUS_BAD_WORKING_SET_LIMIT, -EIO, "STATUS_BAD_WORKING_SET_LIMIT"},
+	{STATUS_INCOMPATIBLE_FILE_MAP, -EIO, "STATUS_INCOMPATIBLE_FILE_MAP"},
+	{STATUS_SECTION_PROTECTION, -EIO, "STATUS_SECTION_PROTECTION"},
+	{STATUS_EAS_NOT_SUPPORTED, -EOPNOTSUPP, "STATUS_EAS_NOT_SUPPORTED"},
+	{STATUS_EA_TOO_LARGE, -EIO, "STATUS_EA_TOO_LARGE"},
+	{STATUS_NONEXISTENT_EA_ENTRY, -EIO, "STATUS_NONEXISTENT_EA_ENTRY"},
+	{STATUS_NO_EAS_ON_FILE, -ENODATA, "STATUS_NO_EAS_ON_FILE"},
+	{STATUS_EA_CORRUPT_ERROR, -EIO, "STATUS_EA_CORRUPT_ERROR"},
+	{STATUS_FILE_LOCK_CONFLICT, -EACCES, "STATUS_FILE_LOCK_CONFLICT"},
+	{STATUS_LOCK_NOT_GRANTED, -EACCES, "STATUS_LOCK_NOT_GRANTED"},
+	{STATUS_DELETE_PENDING, -ENOENT, "STATUS_DELETE_PENDING"},
+	{STATUS_CTL_FILE_NOT_SUPPORTED, -ENOSYS,
+	"STATUS_CTL_FILE_NOT_SUPPORTED"},
+	{STATUS_UNKNOWN_REVISION, -EIO, "STATUS_UNKNOWN_REVISION"},
+	{STATUS_REVISION_MISMATCH, -EIO, "STATUS_REVISION_MISMATCH"},
+	{STATUS_INVALID_OWNER, -EIO, "STATUS_INVALID_OWNER"},
+	{STATUS_INVALID_PRIMARY_GROUP, -EIO, "STATUS_INVALID_PRIMARY_GROUP"},
+	{STATUS_NO_IMPERSONATION_TOKEN, -EIO, "STATUS_NO_IMPERSONATION_TOKEN"},
+	{STATUS_CANT_DISABLE_MANDATORY, -EIO, "STATUS_CANT_DISABLE_MANDATORY"},
+	{STATUS_NO_LOGON_SERVERS, -EIO, "STATUS_NO_LOGON_SERVERS"},
+	{STATUS_NO_SUCH_LOGON_SESSION, -EIO, "STATUS_NO_SUCH_LOGON_SESSION"},
+	{STATUS_NO_SUCH_PRIVILEGE, -EIO, "STATUS_NO_SUCH_PRIVILEGE"},
+	{STATUS_PRIVILEGE_NOT_HELD, -EIO, "STATUS_PRIVILEGE_NOT_HELD"},
+	{STATUS_INVALID_ACCOUNT_NAME, -EIO, "STATUS_INVALID_ACCOUNT_NAME"},
+	{STATUS_USER_EXISTS, -EIO, "STATUS_USER_EXISTS"},
+	{STATUS_NO_SUCH_USER, -EIO, "STATUS_NO_SUCH_USER"},
+	{STATUS_GROUP_EXISTS, -EIO, "STATUS_GROUP_EXISTS"},
+	{STATUS_NO_SUCH_GROUP, -EIO, "STATUS_NO_SUCH_GROUP"},
+	{STATUS_MEMBER_IN_GROUP, -EIO, "STATUS_MEMBER_IN_GROUP"},
+	{STATUS_MEMBER_NOT_IN_GROUP, -EIO, "STATUS_MEMBER_NOT_IN_GROUP"},
+	{STATUS_LAST_ADMIN, -EIO, "STATUS_LAST_ADMIN"},
+	{STATUS_WRONG_PASSWORD, -EACCES, "STATUS_WRONG_PASSWORD"},
+	{STATUS_ILL_FORMED_PASSWORD, -EINVAL, "STATUS_ILL_FORMED_PASSWORD"},
+	{STATUS_PASSWORD_RESTRICTION, -EACCES, "STATUS_PASSWORD_RESTRICTION"},
+	{STATUS_LOGON_FAILURE, -EACCES, "STATUS_LOGON_FAILURE"},
+	{STATUS_ACCOUNT_RESTRICTION, -EACCES, "STATUS_ACCOUNT_RESTRICTION"},
+	{STATUS_INVALID_LOGON_HOURS, -EACCES, "STATUS_INVALID_LOGON_HOURS"},
+	{STATUS_INVALID_WORKSTATION, -EACCES, "STATUS_INVALID_WORKSTATION"},
+	{STATUS_PASSWORD_EXPIRED, -EKEYEXPIRED, "STATUS_PASSWORD_EXPIRED"},
+	{STATUS_ACCOUNT_DISABLED, -EKEYREVOKED, "STATUS_ACCOUNT_DISABLED"},
+	{STATUS_NONE_MAPPED, -EIO, "STATUS_NONE_MAPPED"},
+	{STATUS_TOO_MANY_LUIDS_REQUESTED, -EIO,
+	"STATUS_TOO_MANY_LUIDS_REQUESTED"},
+	{STATUS_LUIDS_EXHAUSTED, -EIO, "STATUS_LUIDS_EXHAUSTED"},
+	{STATUS_INVALID_SUB_AUTHORITY, -EIO, "STATUS_INVALID_SUB_AUTHORITY"},
+	{STATUS_INVALID_ACL, -EIO, "STATUS_INVALID_ACL"},
+	{STATUS_INVALID_SID, -EIO, "STATUS_INVALID_SID"},
+	{STATUS_INVALID_SECURITY_DESCR, -EIO, "STATUS_INVALID_SECURITY_DESCR"},
+	{STATUS_PROCEDURE_NOT_FOUND, -EIO, "STATUS_PROCEDURE_NOT_FOUND"},
+	{STATUS_INVALID_IMAGE_FORMAT, -EIO, "STATUS_INVALID_IMAGE_FORMAT"},
+	{STATUS_NO_TOKEN, -EIO, "STATUS_NO_TOKEN"},
+	{STATUS_BAD_INHERITANCE_ACL, -EIO, "STATUS_BAD_INHERITANCE_ACL"},
+	{STATUS_RANGE_NOT_LOCKED, -EIO, "STATUS_RANGE_NOT_LOCKED"},
+	{STATUS_DISK_FULL, -ENOSPC, "STATUS_DISK_FULL"},
+	{STATUS_SERVER_DISABLED, -EIO, "STATUS_SERVER_DISABLED"},
+	{STATUS_SERVER_NOT_DISABLED, -EIO, "STATUS_SERVER_NOT_DISABLED"},
+	{STATUS_TOO_MANY_GUIDS_REQUESTED, -EIO,
+	"STATUS_TOO_MANY_GUIDS_REQUESTED"},
+	{STATUS_GUIDS_EXHAUSTED, -EIO, "STATUS_GUIDS_EXHAUSTED"},
+	{STATUS_INVALID_ID_AUTHORITY, -EIO, "STATUS_INVALID_ID_AUTHORITY"},
+	{STATUS_AGENTS_EXHAUSTED, -EIO, "STATUS_AGENTS_EXHAUSTED"},
+	{STATUS_INVALID_VOLUME_LABEL, -EIO, "STATUS_INVALID_VOLUME_LABEL"},
+	{STATUS_SECTION_NOT_EXTENDED, -EIO, "STATUS_SECTION_NOT_EXTENDED"},
+	{STATUS_NOT_MAPPED_DATA, -EIO, "STATUS_NOT_MAPPED_DATA"},
+	{STATUS_RESOURCE_DATA_NOT_FOUND, -EIO,
+	"STATUS_RESOURCE_DATA_NOT_FOUND"},
+	{STATUS_RESOURCE_TYPE_NOT_FOUND, -EIO,
+	"STATUS_RESOURCE_TYPE_NOT_FOUND"},
+	{STATUS_RESOURCE_NAME_NOT_FOUND, -EIO,
+	"STATUS_RESOURCE_NAME_NOT_FOUND"},
+	{STATUS_ARRAY_BOUNDS_EXCEEDED, -EIO, "STATUS_ARRAY_BOUNDS_EXCEEDED"},
+	{STATUS_FLOAT_DENORMAL_OPERAND, -EIO, "STATUS_FLOAT_DENORMAL_OPERAND"},
+	{STATUS_FLOAT_DIVIDE_BY_ZERO, -EIO, "STATUS_FLOAT_DIVIDE_BY_ZERO"},
+	{STATUS_FLOAT_INEXACT_RESULT, -EIO, "STATUS_FLOAT_INEXACT_RESULT"},
+	{STATUS_FLOAT_INVALID_OPERATION, -EIO,
+	"STATUS_FLOAT_INVALID_OPERATION"},
+	{STATUS_FLOAT_OVERFLOW, -EIO, "STATUS_FLOAT_OVERFLOW"},
+	{STATUS_FLOAT_STACK_CHECK, -EIO, "STATUS_FLOAT_STACK_CHECK"},
+	{STATUS_FLOAT_UNDERFLOW, -EIO, "STATUS_FLOAT_UNDERFLOW"},
+	{STATUS_INTEGER_DIVIDE_BY_ZERO, -EIO, "STATUS_INTEGER_DIVIDE_BY_ZERO"},
+	{STATUS_INTEGER_OVERFLOW, -EIO, "STATUS_INTEGER_OVERFLOW"},
+	{STATUS_PRIVILEGED_INSTRUCTION, -EIO, "STATUS_PRIVILEGED_INSTRUCTION"},
+	{STATUS_TOO_MANY_PAGING_FILES, -EIO, "STATUS_TOO_MANY_PAGING_FILES"},
+	{STATUS_FILE_INVALID, -EIO, "STATUS_FILE_INVALID"},
+	{STATUS_ALLOTTED_SPACE_EXCEEDED, -EIO,
+	"STATUS_ALLOTTED_SPACE_EXCEEDED"},
+	{STATUS_INSUFFICIENT_RESOURCES, -EAGAIN,
+				"STATUS_INSUFFICIENT_RESOURCES"},
+	{STATUS_DFS_EXIT_PATH_FOUND, -EIO, "STATUS_DFS_EXIT_PATH_FOUND"},
+	{STATUS_DEVICE_DATA_ERROR, -EIO, "STATUS_DEVICE_DATA_ERROR"},
+	{STATUS_DEVICE_NOT_CONNECTED, -EIO, "STATUS_DEVICE_NOT_CONNECTED"},
+	{STATUS_DEVICE_POWER_FAILURE, -EIO, "STATUS_DEVICE_POWER_FAILURE"},
+	{STATUS_FREE_VM_NOT_AT_BASE, -EIO, "STATUS_FREE_VM_NOT_AT_BASE"},
+	{STATUS_MEMORY_NOT_ALLOCATED, -EFAULT, "STATUS_MEMORY_NOT_ALLOCATED"},
+	{STATUS_WORKING_SET_QUOTA, -EIO, "STATUS_WORKING_SET_QUOTA"},
+	{STATUS_MEDIA_WRITE_PROTECTED, -EROFS, "STATUS_MEDIA_WRITE_PROTECTED"},
+	{STATUS_DEVICE_NOT_READY, -EIO, "STATUS_DEVICE_NOT_READY"},
+	{STATUS_INVALID_GROUP_ATTRIBUTES, -EIO,
+	"STATUS_INVALID_GROUP_ATTRIBUTES"},
+	{STATUS_BAD_IMPERSONATION_LEVEL, -EIO,
+	"STATUS_BAD_IMPERSONATION_LEVEL"},
+	{STATUS_CANT_OPEN_ANONYMOUS, -EIO, "STATUS_CANT_OPEN_ANONYMOUS"},
+	{STATUS_BAD_VALIDATION_CLASS, -EIO, "STATUS_BAD_VALIDATION_CLASS"},
+	{STATUS_BAD_TOKEN_TYPE, -EIO, "STATUS_BAD_TOKEN_TYPE"},
+	{STATUS_BAD_MASTER_BOOT_RECORD, -EIO, "STATUS_BAD_MASTER_BOOT_RECORD"},
+	{STATUS_INSTRUCTION_MISALIGNMENT, -EIO,
+	"STATUS_INSTRUCTION_MISALIGNMENT"},
+	{STATUS_INSTANCE_NOT_AVAILABLE, -EIO, "STATUS_INSTANCE_NOT_AVAILABLE"},
+	{STATUS_PIPE_NOT_AVAILABLE, -EIO, "STATUS_PIPE_NOT_AVAILABLE"},
+	{STATUS_INVALID_PIPE_STATE, -EIO, "STATUS_INVALID_PIPE_STATE"},
+	{STATUS_PIPE_BUSY, -EBUSY, "STATUS_PIPE_BUSY"},
+	{STATUS_ILLEGAL_FUNCTION, -EIO, "STATUS_ILLEGAL_FUNCTION"},
+	{STATUS_PIPE_DISCONNECTED, -EPIPE, "STATUS_PIPE_DISCONNECTED"},
+	{STATUS_PIPE_CLOSING, -EIO, "STATUS_PIPE_CLOSING"},
+	{STATUS_PIPE_CONNECTED, -EIO, "STATUS_PIPE_CONNECTED"},
+	{STATUS_PIPE_LISTENING, -EIO, "STATUS_PIPE_LISTENING"},
+	{STATUS_INVALID_READ_MODE, -EIO, "STATUS_INVALID_READ_MODE"},
+	{STATUS_IO_TIMEOUT, -EAGAIN, "STATUS_IO_TIMEOUT"},
+	{STATUS_FILE_FORCED_CLOSED, -EIO, "STATUS_FILE_FORCED_CLOSED"},
+	{STATUS_PROFILING_NOT_STARTED, -EIO, "STATUS_PROFILING_NOT_STARTED"},
+	{STATUS_PROFILING_NOT_STOPPED, -EIO, "STATUS_PROFILING_NOT_STOPPED"},
+	{STATUS_COULD_NOT_INTERPRET, -EIO, "STATUS_COULD_NOT_INTERPRET"},
+	{STATUS_FILE_IS_A_DIRECTORY, -EISDIR, "STATUS_FILE_IS_A_DIRECTORY"},
+	{STATUS_NOT_SUPPORTED, -EOPNOTSUPP, "STATUS_NOT_SUPPORTED"},
+	{STATUS_REMOTE_NOT_LISTENING, -EHOSTDOWN,
+	"STATUS_REMOTE_NOT_LISTENING"},
+	{STATUS_DUPLICATE_NAME, -ENOTUNIQ, "STATUS_DUPLICATE_NAME"},
+	{STATUS_BAD_NETWORK_PATH, -EINVAL, "STATUS_BAD_NETWORK_PATH"},
+	{STATUS_NETWORK_BUSY, -EBUSY, "STATUS_NETWORK_BUSY"},
+	{STATUS_DEVICE_DOES_NOT_EXIST, -ENODEV, "STATUS_DEVICE_DOES_NOT_EXIST"},
+	{STATUS_TOO_MANY_COMMANDS, -EIO, "STATUS_TOO_MANY_COMMANDS"},
+	{STATUS_ADAPTER_HARDWARE_ERROR, -EIO, "STATUS_ADAPTER_HARDWARE_ERROR"},
+	{STATUS_INVALID_NETWORK_RESPONSE, -EIO,
+	"STATUS_INVALID_NETWORK_RESPONSE"},
+	{STATUS_UNEXPECTED_NETWORK_ERROR, -EIO,
+	"STATUS_UNEXPECTED_NETWORK_ERROR"},
+	{STATUS_BAD_REMOTE_ADAPTER, -EIO, "STATUS_BAD_REMOTE_ADAPTER"},
+	{STATUS_PRINT_QUEUE_FULL, -EIO, "STATUS_PRINT_QUEUE_FULL"},
+	{STATUS_NO_SPOOL_SPACE, -EIO, "STATUS_NO_SPOOL_SPACE"},
+	{STATUS_PRINT_CANCELLED, -EIO, "STATUS_PRINT_CANCELLED"},
+	{STATUS_NETWORK_NAME_DELETED, -EREMCHG, "STATUS_NETWORK_NAME_DELETED"},
+	{STATUS_NETWORK_ACCESS_DENIED, -EACCES, "STATUS_NETWORK_ACCESS_DENIED"},
+	{STATUS_BAD_DEVICE_TYPE, -EIO, "STATUS_BAD_DEVICE_TYPE"},
+	{STATUS_BAD_NETWORK_NAME, -ENOENT, "STATUS_BAD_NETWORK_NAME"},
+	{STATUS_TOO_MANY_NAMES, -EIO, "STATUS_TOO_MANY_NAMES"},
+	{STATUS_TOO_MANY_SESSIONS, -EIO, "STATUS_TOO_MANY_SESSIONS"},
+	{STATUS_SHARING_PAUSED, -EIO, "STATUS_SHARING_PAUSED"},
+	{STATUS_REQUEST_NOT_ACCEPTED, -EIO, "STATUS_REQUEST_NOT_ACCEPTED"},
+	{STATUS_REDIRECTOR_PAUSED, -EIO, "STATUS_REDIRECTOR_PAUSED"},
+	{STATUS_NET_WRITE_FAULT, -EIO, "STATUS_NET_WRITE_FAULT"},
+	{STATUS_PROFILING_AT_LIMIT, -EIO, "STATUS_PROFILING_AT_LIMIT"},
+	{STATUS_NOT_SAME_DEVICE, -EXDEV, "STATUS_NOT_SAME_DEVICE"},
+	{STATUS_FILE_RENAMED, -EIO, "STATUS_FILE_RENAMED"},
+	{STATUS_VIRTUAL_CIRCUIT_CLOSED, -EIO, "STATUS_VIRTUAL_CIRCUIT_CLOSED"},
+	{STATUS_NO_SECURITY_ON_OBJECT, -EIO, "STATUS_NO_SECURITY_ON_OBJECT"},
+	{STATUS_CANT_WAIT, -EIO, "STATUS_CANT_WAIT"},
+	{STATUS_PIPE_EMPTY, -EIO, "STATUS_PIPE_EMPTY"},
+	{STATUS_CANT_ACCESS_DOMAIN_INFO, -EIO,
+	"STATUS_CANT_ACCESS_DOMAIN_INFO"},
+	{STATUS_CANT_TERMINATE_SELF, -EIO, "STATUS_CANT_TERMINATE_SELF"},
+	{STATUS_INVALID_SERVER_STATE, -EIO, "STATUS_INVALID_SERVER_STATE"},
+	{STATUS_INVALID_DOMAIN_STATE, -EIO, "STATUS_INVALID_DOMAIN_STATE"},
+	{STATUS_INVALID_DOMAIN_ROLE, -EIO, "STATUS_INVALID_DOMAIN_ROLE"},
+	{STATUS_NO_SUCH_DOMAIN, -EIO, "STATUS_NO_SUCH_DOMAIN"},
+	{STATUS_DOMAIN_EXISTS, -EIO, "STATUS_DOMAIN_EXISTS"},
+	{STATUS_DOMAIN_LIMIT_EXCEEDED, -EIO, "STATUS_DOMAIN_LIMIT_EXCEEDED"},
+	{STATUS_OPLOCK_NOT_GRANTED, -EIO, "STATUS_OPLOCK_NOT_GRANTED"},
+	{STATUS_INVALID_OPLOCK_PROTOCOL, -EIO,
+	"STATUS_INVALID_OPLOCK_PROTOCOL"},
+	{STATUS_INTERNAL_DB_CORRUPTION, -EIO, "STATUS_INTERNAL_DB_CORRUPTION"},
+	{STATUS_INTERNAL_ERROR, -EIO, "STATUS_INTERNAL_ERROR"},
+	{STATUS_GENERIC_NOT_MAPPED, -EIO, "STATUS_GENERIC_NOT_MAPPED"},
+	{STATUS_BAD_DESCRIPTOR_FORMAT, -EIO, "STATUS_BAD_DESCRIPTOR_FORMAT"},
+	{STATUS_INVALID_USER_BUFFER, -EIO, "STATUS_INVALID_USER_BUFFER"},
+	{STATUS_UNEXPECTED_IO_ERROR, -EIO, "STATUS_UNEXPECTED_IO_ERROR"},
+	{STATUS_UNEXPECTED_MM_CREATE_ERR, -EIO,
+	"STATUS_UNEXPECTED_MM_CREATE_ERR"},
+	{STATUS_UNEXPECTED_MM_MAP_ERROR, -EIO,
+	"STATUS_UNEXPECTED_MM_MAP_ERROR"},
+	{STATUS_UNEXPECTED_MM_EXTEND_ERR, -EIO,
+	"STATUS_UNEXPECTED_MM_EXTEND_ERR"},
+	{STATUS_NOT_LOGON_PROCESS, -EIO, "STATUS_NOT_LOGON_PROCESS"},
+	{STATUS_LOGON_SESSION_EXISTS, -EIO, "STATUS_LOGON_SESSION_EXISTS"},
+	{STATUS_INVALID_PARAMETER_1, -EINVAL, "STATUS_INVALID_PARAMETER_1"},
+	{STATUS_INVALID_PARAMETER_2, -EINVAL, "STATUS_INVALID_PARAMETER_2"},
+	{STATUS_INVALID_PARAMETER_3, -EINVAL, "STATUS_INVALID_PARAMETER_3"},
+	{STATUS_INVALID_PARAMETER_4, -EINVAL, "STATUS_INVALID_PARAMETER_4"},
+	{STATUS_INVALID_PARAMETER_5, -EINVAL, "STATUS_INVALID_PARAMETER_5"},
+	{STATUS_INVALID_PARAMETER_6, -EINVAL, "STATUS_INVALID_PARAMETER_6"},
+	{STATUS_INVALID_PARAMETER_7, -EINVAL, "STATUS_INVALID_PARAMETER_7"},
+	{STATUS_INVALID_PARAMETER_8, -EINVAL, "STATUS_INVALID_PARAMETER_8"},
+	{STATUS_INVALID_PARAMETER_9, -EINVAL, "STATUS_INVALID_PARAMETER_9"},
+	{STATUS_INVALID_PARAMETER_10, -EINVAL, "STATUS_INVALID_PARAMETER_10"},
+	{STATUS_INVALID_PARAMETER_11, -EINVAL, "STATUS_INVALID_PARAMETER_11"},
+	{STATUS_INVALID_PARAMETER_12, -EINVAL, "STATUS_INVALID_PARAMETER_12"},
+	{STATUS_REDIRECTOR_NOT_STARTED, -EIO, "STATUS_REDIRECTOR_NOT_STARTED"},
+	{STATUS_REDIRECTOR_STARTED, -EIO, "STATUS_REDIRECTOR_STARTED"},
+	{STATUS_STACK_OVERFLOW, -EIO, "STATUS_STACK_OVERFLOW"},
+	{STATUS_NO_SUCH_PACKAGE, -EIO, "STATUS_NO_SUCH_PACKAGE"},
+	{STATUS_BAD_FUNCTION_TABLE, -EIO, "STATUS_BAD_FUNCTION_TABLE"},
+	{STATUS_VARIABLE_NOT_FOUND, -EIO, "STATUS_VARIABLE_NOT_FOUND"},
+	{STATUS_DIRECTORY_NOT_EMPTY, -ENOTEMPTY, "STATUS_DIRECTORY_NOT_EMPTY"},
+	{STATUS_FILE_CORRUPT_ERROR, -EIO, "STATUS_FILE_CORRUPT_ERROR"},
+	{STATUS_NOT_A_DIRECTORY, -ENOTDIR, "STATUS_NOT_A_DIRECTORY"},
+	{STATUS_BAD_LOGON_SESSION_STATE, -EIO,
+	"STATUS_BAD_LOGON_SESSION_STATE"},
+	{STATUS_LOGON_SESSION_COLLISION, -EIO,
+	"STATUS_LOGON_SESSION_COLLISION"},
+	{STATUS_NAME_TOO_LONG, -ENAMETOOLONG, "STATUS_NAME_TOO_LONG"},
+	{STATUS_FILES_OPEN, -EIO, "STATUS_FILES_OPEN"},
+	{STATUS_CONNECTION_IN_USE, -EIO, "STATUS_CONNECTION_IN_USE"},
+	{STATUS_MESSAGE_NOT_FOUND, -EIO, "STATUS_MESSAGE_NOT_FOUND"},
+	{STATUS_PROCESS_IS_TERMINATING, -EIO, "STATUS_PROCESS_IS_TERMINATING"},
+	{STATUS_INVALID_LOGON_TYPE, -EIO, "STATUS_INVALID_LOGON_TYPE"},
+	{STATUS_NO_GUID_TRANSLATION, -EIO, "STATUS_NO_GUID_TRANSLATION"},
+	{STATUS_CANNOT_IMPERSONATE, -EIO, "STATUS_CANNOT_IMPERSONATE"},
+	{STATUS_IMAGE_ALREADY_LOADED, -EIO, "STATUS_IMAGE_ALREADY_LOADED"},
+	{STATUS_ABIOS_NOT_PRESENT, -EIO, "STATUS_ABIOS_NOT_PRESENT"},
+	{STATUS_ABIOS_LID_NOT_EXIST, -EIO, "STATUS_ABIOS_LID_NOT_EXIST"},
+	{STATUS_ABIOS_LID_ALREADY_OWNED, -EIO,
+	"STATUS_ABIOS_LID_ALREADY_OWNED"},
+	{STATUS_ABIOS_NOT_LID_OWNER, -EIO, "STATUS_ABIOS_NOT_LID_OWNER"},
+	{STATUS_ABIOS_INVALID_COMMAND, -EIO, "STATUS_ABIOS_INVALID_COMMAND"},
+	{STATUS_ABIOS_INVALID_LID, -EIO, "STATUS_ABIOS_INVALID_LID"},
+	{STATUS_ABIOS_SELECTOR_NOT_AVAILABLE, -EIO,
+	"STATUS_ABIOS_SELECTOR_NOT_AVAILABLE"},
+	{STATUS_ABIOS_INVALID_SELECTOR, -EIO, "STATUS_ABIOS_INVALID_SELECTOR"},
+	{STATUS_NO_LDT, -EIO, "STATUS_NO_LDT"},
+	{STATUS_INVALID_LDT_SIZE, -EIO, "STATUS_INVALID_LDT_SIZE"},
+	{STATUS_INVALID_LDT_OFFSET, -EIO, "STATUS_INVALID_LDT_OFFSET"},
+	{STATUS_INVALID_LDT_DESCRIPTOR, -EIO, "STATUS_INVALID_LDT_DESCRIPTOR"},
+	{STATUS_INVALID_IMAGE_NE_FORMAT, -EIO,
+	"STATUS_INVALID_IMAGE_NE_FORMAT"},
+	{STATUS_RXACT_INVALID_STATE, -EIO, "STATUS_RXACT_INVALID_STATE"},
+	{STATUS_RXACT_COMMIT_FAILURE, -EIO, "STATUS_RXACT_COMMIT_FAILURE"},
+	{STATUS_MAPPED_FILE_SIZE_ZERO, -EIO, "STATUS_MAPPED_FILE_SIZE_ZERO"},
+	{STATUS_TOO_MANY_OPENED_FILES, -EMFILE, "STATUS_TOO_MANY_OPENED_FILES"},
+	{STATUS_CANCELLED, -EIO, "STATUS_CANCELLED"},
+	{STATUS_CANNOT_DELETE, -EACCES, "STATUS_CANNOT_DELETE"},
+	{STATUS_INVALID_COMPUTER_NAME, -EIO, "STATUS_INVALID_COMPUTER_NAME"},
+	{STATUS_FILE_DELETED, -EIO, "STATUS_FILE_DELETED"},
+	{STATUS_SPECIAL_ACCOUNT, -EIO, "STATUS_SPECIAL_ACCOUNT"},
+	{STATUS_SPECIAL_GROUP, -EIO, "STATUS_SPECIAL_GROUP"},
+	{STATUS_SPECIAL_USER, -EIO, "STATUS_SPECIAL_USER"},
+	{STATUS_MEMBERS_PRIMARY_GROUP, -EIO, "STATUS_MEMBERS_PRIMARY_GROUP"},
+	{STATUS_FILE_CLOSED, -EBADF, "STATUS_FILE_CLOSED"},
+	{STATUS_TOO_MANY_THREADS, -EIO, "STATUS_TOO_MANY_THREADS"},
+	{STATUS_THREAD_NOT_IN_PROCESS, -EIO, "STATUS_THREAD_NOT_IN_PROCESS"},
+	{STATUS_TOKEN_ALREADY_IN_USE, -EIO, "STATUS_TOKEN_ALREADY_IN_USE"},
+	{STATUS_PAGEFILE_QUOTA_EXCEEDED, -EDQUOT,
+	"STATUS_PAGEFILE_QUOTA_EXCEEDED"},
+	{STATUS_COMMITMENT_LIMIT, -EIO, "STATUS_COMMITMENT_LIMIT"},
+	{STATUS_INVALID_IMAGE_LE_FORMAT, -EIO,
+	"STATUS_INVALID_IMAGE_LE_FORMAT"},
+	{STATUS_INVALID_IMAGE_NOT_MZ, -EIO, "STATUS_INVALID_IMAGE_NOT_MZ"},
+	{STATUS_INVALID_IMAGE_PROTECT, -EIO, "STATUS_INVALID_IMAGE_PROTECT"},
+	{STATUS_INVALID_IMAGE_WIN_16, -EIO, "STATUS_INVALID_IMAGE_WIN_16"},
+	{STATUS_LOGON_SERVER_CONFLICT, -EIO, "STATUS_LOGON_SERVER_CONFLICT"},
+	{STATUS_TIME_DIFFERENCE_AT_DC, -EIO, "STATUS_TIME_DIFFERENCE_AT_DC"},
+	{STATUS_SYNCHRONIZATION_REQUIRED, -EIO,
+	"STATUS_SYNCHRONIZATION_REQUIRED"},
+	{STATUS_DLL_NOT_FOUND, -ENOENT, "STATUS_DLL_NOT_FOUND"},
+	{STATUS_OPEN_FAILED, -EIO, "STATUS_OPEN_FAILED"},
+	{STATUS_IO_PRIVILEGE_FAILED, -EIO, "STATUS_IO_PRIVILEGE_FAILED"},
+	{STATUS_ORDINAL_NOT_FOUND, -EIO, "STATUS_ORDINAL_NOT_FOUND"},
+	{STATUS_ENTRYPOINT_NOT_FOUND, -EIO, "STATUS_ENTRYPOINT_NOT_FOUND"},
+	{STATUS_CONTROL_C_EXIT, -EIO, "STATUS_CONTROL_C_EXIT"},
+	{STATUS_LOCAL_DISCONNECT, -EIO, "STATUS_LOCAL_DISCONNECT"},
+	{STATUS_REMOTE_DISCONNECT, -ESHUTDOWN, "STATUS_REMOTE_DISCONNECT"},
+	{STATUS_REMOTE_RESOURCES, -EIO, "STATUS_REMOTE_RESOURCES"},
+	{STATUS_LINK_FAILED, -EXDEV, "STATUS_LINK_FAILED"},
+	{STATUS_LINK_TIMEOUT, -ETIMEDOUT, "STATUS_LINK_TIMEOUT"},
+	{STATUS_INVALID_CONNECTION, -EIO, "STATUS_INVALID_CONNECTION"},
+	{STATUS_INVALID_ADDRESS, -EIO, "STATUS_INVALID_ADDRESS"},
+	{STATUS_DLL_INIT_FAILED, -EIO, "STATUS_DLL_INIT_FAILED"},
+	{STATUS_MISSING_SYSTEMFILE, -EIO, "STATUS_MISSING_SYSTEMFILE"},
+	{STATUS_UNHANDLED_EXCEPTION, -EIO, "STATUS_UNHANDLED_EXCEPTION"},
+	{STATUS_APP_INIT_FAILURE, -EIO, "STATUS_APP_INIT_FAILURE"},
+	{STATUS_PAGEFILE_CREATE_FAILED, -EIO, "STATUS_PAGEFILE_CREATE_FAILED"},
+	{STATUS_NO_PAGEFILE, -EIO, "STATUS_NO_PAGEFILE"},
+	{STATUS_INVALID_LEVEL, -EIO, "STATUS_INVALID_LEVEL"},
+	{STATUS_WRONG_PASSWORD_CORE, -EIO, "STATUS_WRONG_PASSWORD_CORE"},
+	{STATUS_ILLEGAL_FLOAT_CONTEXT, -EIO, "STATUS_ILLEGAL_FLOAT_CONTEXT"},
+	{STATUS_PIPE_BROKEN, -EPIPE, "STATUS_PIPE_BROKEN"},
+	{STATUS_REGISTRY_CORRUPT, -EIO, "STATUS_REGISTRY_CORRUPT"},
+	{STATUS_REGISTRY_IO_FAILED, -EIO, "STATUS_REGISTRY_IO_FAILED"},
+	{STATUS_NO_EVENT_PAIR, -EIO, "STATUS_NO_EVENT_PAIR"},
+	{STATUS_UNRECOGNIZED_VOLUME, -EIO, "STATUS_UNRECOGNIZED_VOLUME"},
+	{STATUS_SERIAL_NO_DEVICE_INITED, -EIO,
+	"STATUS_SERIAL_NO_DEVICE_INITED"},
+	{STATUS_NO_SUCH_ALIAS, -EIO, "STATUS_NO_SUCH_ALIAS"},
+	{STATUS_MEMBER_NOT_IN_ALIAS, -EIO, "STATUS_MEMBER_NOT_IN_ALIAS"},
+	{STATUS_MEMBER_IN_ALIAS, -EIO, "STATUS_MEMBER_IN_ALIAS"},
+	{STATUS_ALIAS_EXISTS, -EIO, "STATUS_ALIAS_EXISTS"},
+	{STATUS_LOGON_NOT_GRANTED, -EIO, "STATUS_LOGON_NOT_GRANTED"},
+	{STATUS_TOO_MANY_SECRETS, -EIO, "STATUS_TOO_MANY_SECRETS"},
+	{STATUS_SECRET_TOO_LONG, -EIO, "STATUS_SECRET_TOO_LONG"},
+	{STATUS_INTERNAL_DB_ERROR, -EIO, "STATUS_INTERNAL_DB_ERROR"},
+	{STATUS_FULLSCREEN_MODE, -EIO, "STATUS_FULLSCREEN_MODE"},
+	{STATUS_TOO_MANY_CONTEXT_IDS, -EIO, "STATUS_TOO_MANY_CONTEXT_IDS"},
+	{STATUS_LOGON_TYPE_NOT_GRANTED, -EIO, "STATUS_LOGON_TYPE_NOT_GRANTED"},
+	{STATUS_NOT_REGISTRY_FILE, -EIO, "STATUS_NOT_REGISTRY_FILE"},
+	{STATUS_NT_CROSS_ENCRYPTION_REQUIRED, -EIO,
+	"STATUS_NT_CROSS_ENCRYPTION_REQUIRED"},
+	{STATUS_DOMAIN_CTRLR_CONFIG_ERROR, -EIO,
+	"STATUS_DOMAIN_CTRLR_CONFIG_ERROR"},
+	{STATUS_FT_MISSING_MEMBER, -EIO, "STATUS_FT_MISSING_MEMBER"},
+	{STATUS_ILL_FORMED_SERVICE_ENTRY, -EIO,
+	"STATUS_ILL_FORMED_SERVICE_ENTRY"},
+	{STATUS_ILLEGAL_CHARACTER, -EIO, "STATUS_ILLEGAL_CHARACTER"},
+	{STATUS_UNMAPPABLE_CHARACTER, -EIO, "STATUS_UNMAPPABLE_CHARACTER"},
+	{STATUS_UNDEFINED_CHARACTER, -EIO, "STATUS_UNDEFINED_CHARACTER"},
+	{STATUS_FLOPPY_VOLUME, -EIO, "STATUS_FLOPPY_VOLUME"},
+	{STATUS_FLOPPY_ID_MARK_NOT_FOUND, -EIO,
+	"STATUS_FLOPPY_ID_MARK_NOT_FOUND"},
+	{STATUS_FLOPPY_WRONG_CYLINDER, -EIO, "STATUS_FLOPPY_WRONG_CYLINDER"},
+	{STATUS_FLOPPY_UNKNOWN_ERROR, -EIO, "STATUS_FLOPPY_UNKNOWN_ERROR"},
+	{STATUS_FLOPPY_BAD_REGISTERS, -EIO, "STATUS_FLOPPY_BAD_REGISTERS"},
+	{STATUS_DISK_RECALIBRATE_FAILED, -EIO,
+	"STATUS_DISK_RECALIBRATE_FAILED"},
+	{STATUS_DISK_OPERATION_FAILED, -EIO, "STATUS_DISK_OPERATION_FAILED"},
+	{STATUS_DISK_RESET_FAILED, -EIO, "STATUS_DISK_RESET_FAILED"},
+	{STATUS_SHARED_IRQ_BUSY, -EBUSY, "STATUS_SHARED_IRQ_BUSY"},
+	{STATUS_FT_ORPHANING, -EIO, "STATUS_FT_ORPHANING"},
+	{STATUS_BIOS_FAILED_TO_CONNECT_INTERRUPT, -EIO,
+	"STATUS_BIOS_FAILED_TO_CONNECT_INTERRUPT"},
+	{STATUS_PARTITION_FAILURE, -EIO, "STATUS_PARTITION_FAILURE"},
+	{STATUS_INVALID_BLOCK_LENGTH, -EIO, "STATUS_INVALID_BLOCK_LENGTH"},
+	{STATUS_DEVICE_NOT_PARTITIONED, -EIO, "STATUS_DEVICE_NOT_PARTITIONED"},
+	{STATUS_UNABLE_TO_LOCK_MEDIA, -EIO, "STATUS_UNABLE_TO_LOCK_MEDIA"},
+	{STATUS_UNABLE_TO_UNLOAD_MEDIA, -EIO, "STATUS_UNABLE_TO_UNLOAD_MEDIA"},
+	{STATUS_EOM_OVERFLOW, -EIO, "STATUS_EOM_OVERFLOW"},
+	{STATUS_NO_MEDIA, -EIO, "STATUS_NO_MEDIA"},
+	{STATUS_NO_SUCH_MEMBER, -EIO, "STATUS_NO_SUCH_MEMBER"},
+	{STATUS_INVALID_MEMBER, -EIO, "STATUS_INVALID_MEMBER"},
+	{STATUS_KEY_DELETED, -EIO, "STATUS_KEY_DELETED"},
+	{STATUS_NO_LOG_SPACE, -EIO, "STATUS_NO_LOG_SPACE"},
+	{STATUS_TOO_MANY_SIDS, -EIO, "STATUS_TOO_MANY_SIDS"},
+	{STATUS_LM_CROSS_ENCRYPTION_REQUIRED, -EIO,
+	"STATUS_LM_CROSS_ENCRYPTION_REQUIRED"},
+	{STATUS_KEY_HAS_CHILDREN, -EIO, "STATUS_KEY_HAS_CHILDREN"},
+	{STATUS_CHILD_MUST_BE_VOLATILE, -EIO, "STATUS_CHILD_MUST_BE_VOLATILE"},
+	{STATUS_DEVICE_CONFIGURATION_ERROR, -EIO,
+	"STATUS_DEVICE_CONFIGURATION_ERROR"},
+	{STATUS_DRIVER_INTERNAL_ERROR, -EIO, "STATUS_DRIVER_INTERNAL_ERROR"},
+	{STATUS_INVALID_DEVICE_STATE, -EIO, "STATUS_INVALID_DEVICE_STATE"},
+	{STATUS_IO_DEVICE_ERROR, -EIO, "STATUS_IO_DEVICE_ERROR"},
+	{STATUS_DEVICE_PROTOCOL_ERROR, -EIO, "STATUS_DEVICE_PROTOCOL_ERROR"},
+	{STATUS_BACKUP_CONTROLLER, -EIO, "STATUS_BACKUP_CONTROLLER"},
+	{STATUS_LOG_FILE_FULL, -EIO, "STATUS_LOG_FILE_FULL"},
+	{STATUS_TOO_LATE, -EIO, "STATUS_TOO_LATE"},
+	{STATUS_NO_TRUST_LSA_SECRET, -EIO, "STATUS_NO_TRUST_LSA_SECRET"},
+	{STATUS_NO_TRUST_SAM_ACCOUNT, -EIO, "STATUS_NO_TRUST_SAM_ACCOUNT"},
+	{STATUS_TRUSTED_DOMAIN_FAILURE, -EIO, "STATUS_TRUSTED_DOMAIN_FAILURE"},
+	{STATUS_TRUSTED_RELATIONSHIP_FAILURE, -EIO,
+	"STATUS_TRUSTED_RELATIONSHIP_FAILURE"},
+	{STATUS_EVENTLOG_FILE_CORRUPT, -EIO, "STATUS_EVENTLOG_FILE_CORRUPT"},
+	{STATUS_EVENTLOG_CANT_START, -EIO, "STATUS_EVENTLOG_CANT_START"},
+	{STATUS_TRUST_FAILURE, -EIO, "STATUS_TRUST_FAILURE"},
+	{STATUS_MUTANT_LIMIT_EXCEEDED, -EIO, "STATUS_MUTANT_LIMIT_EXCEEDED"},
+	{STATUS_NETLOGON_NOT_STARTED, -EIO, "STATUS_NETLOGON_NOT_STARTED"},
+	{STATUS_ACCOUNT_EXPIRED, -EKEYEXPIRED, "STATUS_ACCOUNT_EXPIRED"},
+	{STATUS_POSSIBLE_DEADLOCK, -EIO, "STATUS_POSSIBLE_DEADLOCK"},
+	{STATUS_NETWORK_CREDENTIAL_CONFLICT, -EIO,
+	"STATUS_NETWORK_CREDENTIAL_CONFLICT"},
+	{STATUS_REMOTE_SESSION_LIMIT, -EIO, "STATUS_REMOTE_SESSION_LIMIT"},
+	{STATUS_EVENTLOG_FILE_CHANGED, -EIO, "STATUS_EVENTLOG_FILE_CHANGED"},
+	{STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT, -EIO,
+	"STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT"},
+	{STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT, -EIO,
+	"STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT"},
+	{STATUS_NOLOGON_SERVER_TRUST_ACCOUNT, -EIO,
+	"STATUS_NOLOGON_SERVER_TRUST_ACCOUNT"},
+	{STATUS_DOMAIN_TRUST_INCONSISTENT, -EIO,
+	"STATUS_DOMAIN_TRUST_INCONSISTENT"},
+	{STATUS_FS_DRIVER_REQUIRED, -EOPNOTSUPP, "STATUS_FS_DRIVER_REQUIRED"},
+	{STATUS_IMAGE_ALREADY_LOADED_AS_DLL, -EIO,
+	"STATUS_IMAGE_ALREADY_LOADED_AS_DLL"},
+	{STATUS_NETWORK_OPEN_RESTRICTION, -EIO,
+	"STATUS_NETWORK_OPEN_RESTRICTION"},
+	{STATUS_NO_USER_SESSION_KEY, -EIO, "STATUS_NO_USER_SESSION_KEY"},
+	{STATUS_USER_SESSION_DELETED, -EIO, "STATUS_USER_SESSION_DELETED"},
+	{STATUS_RESOURCE_LANG_NOT_FOUND, -EIO,
+	"STATUS_RESOURCE_LANG_NOT_FOUND"},
+	{STATUS_INSUFF_SERVER_RESOURCES, -EIO,
+	"STATUS_INSUFF_SERVER_RESOURCES"},
+	{STATUS_INVALID_BUFFER_SIZE, -EIO, "STATUS_INVALID_BUFFER_SIZE"},
+	{STATUS_INVALID_ADDRESS_COMPONENT, -EIO,
+	"STATUS_INVALID_ADDRESS_COMPONENT"},
+	{STATUS_INVALID_ADDRESS_WILDCARD, -EIO,
+	"STATUS_INVALID_ADDRESS_WILDCARD"},
+	{STATUS_TOO_MANY_ADDRESSES, -EIO, "STATUS_TOO_MANY_ADDRESSES"},
+	{STATUS_ADDRESS_ALREADY_EXISTS, -EADDRINUSE,
+	"STATUS_ADDRESS_ALREADY_EXISTS"},
+	{STATUS_ADDRESS_CLOSED, -EIO, "STATUS_ADDRESS_CLOSED"},
+	{STATUS_CONNECTION_DISCONNECTED, -ECONNABORTED,
+	"STATUS_CONNECTION_DISCONNECTED"},
+	{STATUS_CONNECTION_RESET, -ENETRESET, "STATUS_CONNECTION_RESET"},
+	{STATUS_TOO_MANY_NODES, -EIO, "STATUS_TOO_MANY_NODES"},
+	{STATUS_TRANSACTION_ABORTED, -EIO, "STATUS_TRANSACTION_ABORTED"},
+	{STATUS_TRANSACTION_TIMED_OUT, -EIO, "STATUS_TRANSACTION_TIMED_OUT"},
+	{STATUS_TRANSACTION_NO_RELEASE, -EIO, "STATUS_TRANSACTION_NO_RELEASE"},
+	{STATUS_TRANSACTION_NO_MATCH, -EIO, "STATUS_TRANSACTION_NO_MATCH"},
+	{STATUS_TRANSACTION_RESPONDED, -EIO, "STATUS_TRANSACTION_RESPONDED"},
+	{STATUS_TRANSACTION_INVALID_ID, -EIO, "STATUS_TRANSACTION_INVALID_ID"},
+	{STATUS_TRANSACTION_INVALID_TYPE, -EIO,
+	"STATUS_TRANSACTION_INVALID_TYPE"},
+	{STATUS_NOT_SERVER_SESSION, -EIO, "STATUS_NOT_SERVER_SESSION"},
+	{STATUS_NOT_CLIENT_SESSION, -EIO, "STATUS_NOT_CLIENT_SESSION"},
+	{STATUS_CANNOT_LOAD_REGISTRY_FILE, -EIO,
+	"STATUS_CANNOT_LOAD_REGISTRY_FILE"},
+	{STATUS_DEBUG_ATTACH_FAILED, -EIO, "STATUS_DEBUG_ATTACH_FAILED"},
+	{STATUS_SYSTEM_PROCESS_TERMINATED, -EIO,
+	"STATUS_SYSTEM_PROCESS_TERMINATED"},
+	{STATUS_DATA_NOT_ACCEPTED, -EIO, "STATUS_DATA_NOT_ACCEPTED"},
+	{STATUS_NO_BROWSER_SERVERS_FOUND, -EIO,
+	"STATUS_NO_BROWSER_SERVERS_FOUND"},
+	{STATUS_VDM_HARD_ERROR, -EIO, "STATUS_VDM_HARD_ERROR"},
+	{STATUS_DRIVER_CANCEL_TIMEOUT, -EIO, "STATUS_DRIVER_CANCEL_TIMEOUT"},
+	{STATUS_REPLY_MESSAGE_MISMATCH, -EIO, "STATUS_REPLY_MESSAGE_MISMATCH"},
+	{STATUS_MAPPED_ALIGNMENT, -EIO, "STATUS_MAPPED_ALIGNMENT"},
+	{STATUS_IMAGE_CHECKSUM_MISMATCH, -EIO,
+	"STATUS_IMAGE_CHECKSUM_MISMATCH"},
+	{STATUS_LOST_WRITEBEHIND_DATA, -EIO, "STATUS_LOST_WRITEBEHIND_DATA"},
+	{STATUS_CLIENT_SERVER_PARAMETERS_INVALID, -EIO,
+	"STATUS_CLIENT_SERVER_PARAMETERS_INVALID"},
+	{STATUS_PASSWORD_MUST_CHANGE, -EIO, "STATUS_PASSWORD_MUST_CHANGE"},
+	{STATUS_NOT_FOUND, -ENOENT, "STATUS_NOT_FOUND"},
+	{STATUS_NOT_TINY_STREAM, -EIO, "STATUS_NOT_TINY_STREAM"},
+	{STATUS_RECOVERY_FAILURE, -EIO, "STATUS_RECOVERY_FAILURE"},
+	{STATUS_STACK_OVERFLOW_READ, -EIO, "STATUS_STACK_OVERFLOW_READ"},
+	{STATUS_FAIL_CHECK, -EIO, "STATUS_FAIL_CHECK"},
+	{STATUS_DUPLICATE_OBJECTID, -EIO, "STATUS_DUPLICATE_OBJECTID"},
+	{STATUS_OBJECTID_EXISTS, -EIO, "STATUS_OBJECTID_EXISTS"},
+	{STATUS_CONVERT_TO_LARGE, -EIO, "STATUS_CONVERT_TO_LARGE"},
+	{STATUS_RETRY, -EAGAIN, "STATUS_RETRY"},
+	{STATUS_FOUND_OUT_OF_SCOPE, -EIO, "STATUS_FOUND_OUT_OF_SCOPE"},
+	{STATUS_ALLOCATE_BUCKET, -EIO, "STATUS_ALLOCATE_BUCKET"},
+	{STATUS_PROPSET_NOT_FOUND, -EIO, "STATUS_PROPSET_NOT_FOUND"},
+	{STATUS_MARSHALL_OVERFLOW, -EIO, "STATUS_MARSHALL_OVERFLOW"},
+	{STATUS_INVALID_VARIANT, -EIO, "STATUS_INVALID_VARIANT"},
+	{STATUS_DOMAIN_CONTROLLER_NOT_FOUND, -EIO,
+	"STATUS_DOMAIN_CONTROLLER_NOT_FOUND"},
+	{STATUS_ACCOUNT_LOCKED_OUT, -EACCES, "STATUS_ACCOUNT_LOCKED_OUT"},
+	{STATUS_HANDLE_NOT_CLOSABLE, -EIO, "STATUS_HANDLE_NOT_CLOSABLE"},
+	{STATUS_CONNECTION_REFUSED, -EIO, "STATUS_CONNECTION_REFUSED"},
+	{STATUS_GRACEFUL_DISCONNECT, -EIO, "STATUS_GRACEFUL_DISCONNECT"},
+	{STATUS_ADDRESS_ALREADY_ASSOCIATED, -EIO,
+	"STATUS_ADDRESS_ALREADY_ASSOCIATED"},
+	{STATUS_ADDRESS_NOT_ASSOCIATED, -EIO, "STATUS_ADDRESS_NOT_ASSOCIATED"},
+	{STATUS_CONNECTION_INVALID, -EIO, "STATUS_CONNECTION_INVALID"},
+	{STATUS_CONNECTION_ACTIVE, -EIO, "STATUS_CONNECTION_ACTIVE"},
+	{STATUS_NETWORK_UNREACHABLE, -ENETUNREACH,
+	"STATUS_NETWORK_UNREACHABLE"},
+	{STATUS_HOST_UNREACHABLE, -EHOSTDOWN, "STATUS_HOST_UNREACHABLE"},
+	{STATUS_PROTOCOL_UNREACHABLE, -ENETUNREACH,
+	"STATUS_PROTOCOL_UNREACHABLE"},
+	{STATUS_PORT_UNREACHABLE, -ENETUNREACH, "STATUS_PORT_UNREACHABLE"},
+	{STATUS_REQUEST_ABORTED, -EIO, "STATUS_REQUEST_ABORTED"},
+	{STATUS_CONNECTION_ABORTED, -ECONNABORTED, "STATUS_CONNECTION_ABORTED"},
+	{STATUS_BAD_COMPRESSION_BUFFER, -EIO, "STATUS_BAD_COMPRESSION_BUFFER"},
+	{STATUS_USER_MAPPED_FILE, -EIO, "STATUS_USER_MAPPED_FILE"},
+	{STATUS_AUDIT_FAILED, -EIO, "STATUS_AUDIT_FAILED"},
+	{STATUS_TIMER_RESOLUTION_NOT_SET, -EIO,
+	"STATUS_TIMER_RESOLUTION_NOT_SET"},
+	{STATUS_CONNECTION_COUNT_LIMIT, -EIO, "STATUS_CONNECTION_COUNT_LIMIT"},
+	{STATUS_LOGIN_TIME_RESTRICTION, -EACCES,
+	"STATUS_LOGIN_TIME_RESTRICTION"},
+	{STATUS_LOGIN_WKSTA_RESTRICTION, -EACCES,
+	"STATUS_LOGIN_WKSTA_RESTRICTION"},
+	{STATUS_IMAGE_MP_UP_MISMATCH, -EIO, "STATUS_IMAGE_MP_UP_MISMATCH"},
+	{STATUS_INSUFFICIENT_LOGON_INFO, -EIO,
+	"STATUS_INSUFFICIENT_LOGON_INFO"},
+	{STATUS_BAD_DLL_ENTRYPOINT, -EIO, "STATUS_BAD_DLL_ENTRYPOINT"},
+	{STATUS_BAD_SERVICE_ENTRYPOINT, -EIO, "STATUS_BAD_SERVICE_ENTRYPOINT"},
+	{STATUS_LPC_REPLY_LOST, -EIO, "STATUS_LPC_REPLY_LOST"},
+	{STATUS_IP_ADDRESS_CONFLICT1, -EIO, "STATUS_IP_ADDRESS_CONFLICT1"},
+	{STATUS_IP_ADDRESS_CONFLICT2, -EIO, "STATUS_IP_ADDRESS_CONFLICT2"},
+	{STATUS_REGISTRY_QUOTA_LIMIT, -EDQUOT, "STATUS_REGISTRY_QUOTA_LIMIT"},
+	{STATUS_PATH_NOT_COVERED, -EREMOTE, "STATUS_PATH_NOT_COVERED"},
+	{STATUS_NO_CALLBACK_ACTIVE, -EIO, "STATUS_NO_CALLBACK_ACTIVE"},
+	{STATUS_LICENSE_QUOTA_EXCEEDED, -EACCES,
+	"STATUS_LICENSE_QUOTA_EXCEEDED"},
+	{STATUS_PWD_TOO_SHORT, -EIO, "STATUS_PWD_TOO_SHORT"},
+	{STATUS_PWD_TOO_RECENT, -EIO, "STATUS_PWD_TOO_RECENT"},
+	{STATUS_PWD_HISTORY_CONFLICT, -EIO, "STATUS_PWD_HISTORY_CONFLICT"},
+	{STATUS_PLUGPLAY_NO_DEVICE, -EIO, "STATUS_PLUGPLAY_NO_DEVICE"},
+	{STATUS_UNSUPPORTED_COMPRESSION, -EIO,
+	"STATUS_UNSUPPORTED_COMPRESSION"},
+	{STATUS_INVALID_HW_PROFILE, -EIO, "STATUS_INVALID_HW_PROFILE"},
+	{STATUS_INVALID_PLUGPLAY_DEVICE_PATH, -EIO,
+	"STATUS_INVALID_PLUGPLAY_DEVICE_PATH"},
+	{STATUS_DRIVER_ORDINAL_NOT_FOUND, -EIO,
+	"STATUS_DRIVER_ORDINAL_NOT_FOUND"},
+	{STATUS_DRIVER_ENTRYPOINT_NOT_FOUND, -EIO,
+	"STATUS_DRIVER_ENTRYPOINT_NOT_FOUND"},
+	{STATUS_RESOURCE_NOT_OWNED, -EIO, "STATUS_RESOURCE_NOT_OWNED"},
+	{STATUS_TOO_MANY_LINKS, -EMLINK, "STATUS_TOO_MANY_LINKS"},
+	{STATUS_QUOTA_LIST_INCONSISTENT, -EIO,
+	"STATUS_QUOTA_LIST_INCONSISTENT"},
+	{STATUS_FILE_IS_OFFLINE, -EIO, "STATUS_FILE_IS_OFFLINE"},
+	{STATUS_EVALUATION_EXPIRATION, -EIO, "STATUS_EVALUATION_EXPIRATION"},
+	{STATUS_ILLEGAL_DLL_RELOCATION, -EIO, "STATUS_ILLEGAL_DLL_RELOCATION"},
+	{STATUS_LICENSE_VIOLATION, -EIO, "STATUS_LICENSE_VIOLATION"},
+	{STATUS_DLL_INIT_FAILED_LOGOFF, -EIO, "STATUS_DLL_INIT_FAILED_LOGOFF"},
+	{STATUS_DRIVER_UNABLE_TO_LOAD, -EIO, "STATUS_DRIVER_UNABLE_TO_LOAD"},
+	{STATUS_DFS_UNAVAILABLE, -EIO, "STATUS_DFS_UNAVAILABLE"},
+	{STATUS_VOLUME_DISMOUNTED, -EIO, "STATUS_VOLUME_DISMOUNTED"},
+	{STATUS_WX86_INTERNAL_ERROR, -EIO, "STATUS_WX86_INTERNAL_ERROR"},
+	{STATUS_WX86_FLOAT_STACK_CHECK, -EIO, "STATUS_WX86_FLOAT_STACK_CHECK"},
+	{STATUS_VALIDATE_CONTINUE, -EIO, "STATUS_VALIDATE_CONTINUE"},
+	{STATUS_NO_MATCH, -EIO, "STATUS_NO_MATCH"},
+	{STATUS_NO_MORE_MATCHES, -EIO, "STATUS_NO_MORE_MATCHES"},
+	{STATUS_NOT_A_REPARSE_POINT, -EIO, "STATUS_NOT_A_REPARSE_POINT"},
+	{STATUS_IO_REPARSE_TAG_INVALID, -EIO, "STATUS_IO_REPARSE_TAG_INVALID"},
+	{STATUS_IO_REPARSE_TAG_MISMATCH, -EIO,
+	"STATUS_IO_REPARSE_TAG_MISMATCH"},
+	{STATUS_IO_REPARSE_DATA_INVALID, -EIO,
+	"STATUS_IO_REPARSE_DATA_INVALID"},
+	{STATUS_REPARSE_POINT_NOT_RESOLVED, -EIO,
+	"STATUS_REPARSE_POINT_NOT_RESOLVED"},
+	{STATUS_DIRECTORY_IS_A_REPARSE_POINT, -EIO,
+	"STATUS_DIRECTORY_IS_A_REPARSE_POINT"},
+	{STATUS_RANGE_LIST_CONFLICT, -EIO, "STATUS_RANGE_LIST_CONFLICT"},
+	{STATUS_SOURCE_ELEMENT_EMPTY, -EIO, "STATUS_SOURCE_ELEMENT_EMPTY"},
+	{STATUS_DESTINATION_ELEMENT_FULL, -EIO,
+	"STATUS_DESTINATION_ELEMENT_FULL"},
+	{STATUS_ILLEGAL_ELEMENT_ADDRESS, -EIO,
+	"STATUS_ILLEGAL_ELEMENT_ADDRESS"},
+	{STATUS_MAGAZINE_NOT_PRESENT, -EIO, "STATUS_MAGAZINE_NOT_PRESENT"},
+	{STATUS_REINITIALIZATION_NEEDED, -EIO,
+	"STATUS_REINITIALIZATION_NEEDED"},
+	{STATUS_ENCRYPTION_FAILED, -EIO, "STATUS_ENCRYPTION_FAILED"},
+	{STATUS_DECRYPTION_FAILED, -EIO, "STATUS_DECRYPTION_FAILED"},
+	{STATUS_RANGE_NOT_FOUND, -EIO, "STATUS_RANGE_NOT_FOUND"},
+	{STATUS_NO_RECOVERY_POLICY, -EIO, "STATUS_NO_RECOVERY_POLICY"},
+	{STATUS_NO_EFS, -EIO, "STATUS_NO_EFS"},
+	{STATUS_WRONG_EFS, -EIO, "STATUS_WRONG_EFS"},
+	{STATUS_NO_USER_KEYS, -EIO, "STATUS_NO_USER_KEYS"},
+	{STATUS_FILE_NOT_ENCRYPTED, -EIO, "STATUS_FILE_NOT_ENCRYPTED"},
+	{STATUS_NOT_EXPORT_FORMAT, -EIO, "STATUS_NOT_EXPORT_FORMAT"},
+	{STATUS_FILE_ENCRYPTED, -EIO, "STATUS_FILE_ENCRYPTED"},
+	{STATUS_WMI_GUID_NOT_FOUND, -EIO, "STATUS_WMI_GUID_NOT_FOUND"},
+	{STATUS_WMI_INSTANCE_NOT_FOUND, -EIO, "STATUS_WMI_INSTANCE_NOT_FOUND"},
+	{STATUS_WMI_ITEMID_NOT_FOUND, -EIO, "STATUS_WMI_ITEMID_NOT_FOUND"},
+	{STATUS_WMI_TRY_AGAIN, -EIO, "STATUS_WMI_TRY_AGAIN"},
+	{STATUS_SHARED_POLICY, -EIO, "STATUS_SHARED_POLICY"},
+	{STATUS_POLICY_OBJECT_NOT_FOUND, -EIO,
+	"STATUS_POLICY_OBJECT_NOT_FOUND"},
+	{STATUS_POLICY_ONLY_IN_DS, -EIO, "STATUS_POLICY_ONLY_IN_DS"},
+	{STATUS_VOLUME_NOT_UPGRADED, -EIO, "STATUS_VOLUME_NOT_UPGRADED"},
+	{STATUS_REMOTE_STORAGE_NOT_ACTIVE, -EIO,
+	"STATUS_REMOTE_STORAGE_NOT_ACTIVE"},
+	{STATUS_REMOTE_STORAGE_MEDIA_ERROR, -EIO,
+	"STATUS_REMOTE_STORAGE_MEDIA_ERROR"},
+	{STATUS_NO_TRACKING_SERVICE, -EIO, "STATUS_NO_TRACKING_SERVICE"},
+	{STATUS_SERVER_SID_MISMATCH, -EIO, "STATUS_SERVER_SID_MISMATCH"},
+	{STATUS_DS_NO_ATTRIBUTE_OR_VALUE, -EIO,
+	"STATUS_DS_NO_ATTRIBUTE_OR_VALUE"},
+	{STATUS_DS_INVALID_ATTRIBUTE_SYNTAX, -EIO,
+	"STATUS_DS_INVALID_ATTRIBUTE_SYNTAX"},
+	{STATUS_DS_ATTRIBUTE_TYPE_UNDEFINED, -EIO,
+	"STATUS_DS_ATTRIBUTE_TYPE_UNDEFINED"},
+	{STATUS_DS_ATTRIBUTE_OR_VALUE_EXISTS, -EIO,
+	"STATUS_DS_ATTRIBUTE_OR_VALUE_EXISTS"},
+	{STATUS_DS_BUSY, -EBUSY, "STATUS_DS_BUSY"},
+	{STATUS_DS_UNAVAILABLE, -EIO, "STATUS_DS_UNAVAILABLE"},
+	{STATUS_DS_NO_RIDS_ALLOCATED, -EIO, "STATUS_DS_NO_RIDS_ALLOCATED"},
+	{STATUS_DS_NO_MORE_RIDS, -EIO, "STATUS_DS_NO_MORE_RIDS"},
+	{STATUS_DS_INCORRECT_ROLE_OWNER, -EIO,
+	"STATUS_DS_INCORRECT_ROLE_OWNER"},
+	{STATUS_DS_RIDMGR_INIT_ERROR, -EIO, "STATUS_DS_RIDMGR_INIT_ERROR"},
+	{STATUS_DS_OBJ_CLASS_VIOLATION, -EIO, "STATUS_DS_OBJ_CLASS_VIOLATION"},
+	{STATUS_DS_CANT_ON_NON_LEAF, -EIO, "STATUS_DS_CANT_ON_NON_LEAF"},
+	{STATUS_DS_CANT_ON_RDN, -EIO, "STATUS_DS_CANT_ON_RDN"},
+	{STATUS_DS_CANT_MOD_OBJ_CLASS, -EIO, "STATUS_DS_CANT_MOD_OBJ_CLASS"},
+	{STATUS_DS_CROSS_DOM_MOVE_FAILED, -EIO,
+	"STATUS_DS_CROSS_DOM_MOVE_FAILED"},
+	{STATUS_DS_GC_NOT_AVAILABLE, -EIO, "STATUS_DS_GC_NOT_AVAILABLE"},
+	{STATUS_DIRECTORY_SERVICE_REQUIRED, -EIO,
+	"STATUS_DIRECTORY_SERVICE_REQUIRED"},
+	{STATUS_REPARSE_ATTRIBUTE_CONFLICT, -EIO,
+	"STATUS_REPARSE_ATTRIBUTE_CONFLICT"},
+	{STATUS_CANT_ENABLE_DENY_ONLY, -EIO, "STATUS_CANT_ENABLE_DENY_ONLY"},
+	{STATUS_FLOAT_MULTIPLE_FAULTS, -EIO, "STATUS_FLOAT_MULTIPLE_FAULTS"},
+	{STATUS_FLOAT_MULTIPLE_TRAPS, -EIO, "STATUS_FLOAT_MULTIPLE_TRAPS"},
+	{STATUS_DEVICE_REMOVED, -EIO, "STATUS_DEVICE_REMOVED"},
+	{STATUS_JOURNAL_DELETE_IN_PROGRESS, -EIO,
+	"STATUS_JOURNAL_DELETE_IN_PROGRESS"},
+	{STATUS_JOURNAL_NOT_ACTIVE, -EIO, "STATUS_JOURNAL_NOT_ACTIVE"},
+	{STATUS_NOINTERFACE, -EIO, "STATUS_NOINTERFACE"},
+	{STATUS_DS_ADMIN_LIMIT_EXCEEDED, -EIO,
+	"STATUS_DS_ADMIN_LIMIT_EXCEEDED"},
+	{STATUS_DRIVER_FAILED_SLEEP, -EIO, "STATUS_DRIVER_FAILED_SLEEP"},
+	{STATUS_MUTUAL_AUTHENTICATION_FAILED, -EIO,
+	"STATUS_MUTUAL_AUTHENTICATION_FAILED"},
+	{STATUS_CORRUPT_SYSTEM_FILE, -EIO, "STATUS_CORRUPT_SYSTEM_FILE"},
+	{STATUS_DATATYPE_MISALIGNMENT_ERROR, -EIO,
+	"STATUS_DATATYPE_MISALIGNMENT_ERROR"},
+	{STATUS_WMI_READ_ONLY, -EROFS, "STATUS_WMI_READ_ONLY"},
+	{STATUS_WMI_SET_FAILURE, -EIO, "STATUS_WMI_SET_FAILURE"},
+	{STATUS_COMMITMENT_MINIMUM, -EIO, "STATUS_COMMITMENT_MINIMUM"},
+	{STATUS_REG_NAT_CONSUMPTION, -EIO, "STATUS_REG_NAT_CONSUMPTION"},
+	{STATUS_TRANSPORT_FULL, -EIO, "STATUS_TRANSPORT_FULL"},
+	{STATUS_DS_SAM_INIT_FAILURE, -EIO, "STATUS_DS_SAM_INIT_FAILURE"},
+	{STATUS_ONLY_IF_CONNECTED, -EIO, "STATUS_ONLY_IF_CONNECTED"},
+	{STATUS_DS_SENSITIVE_GROUP_VIOLATION, -EIO,
+	"STATUS_DS_SENSITIVE_GROUP_VIOLATION"},
+	{STATUS_PNP_RESTART_ENUMERATION, -EIO,
+	"STATUS_PNP_RESTART_ENUMERATION"},
+	{STATUS_JOURNAL_ENTRY_DELETED, -EIO, "STATUS_JOURNAL_ENTRY_DELETED"},
+	{STATUS_DS_CANT_MOD_PRIMARYGROUPID, -EIO,
+	"STATUS_DS_CANT_MOD_PRIMARYGROUPID"},
+	{STATUS_SYSTEM_IMAGE_BAD_SIGNATURE, -EIO,
+	"STATUS_SYSTEM_IMAGE_BAD_SIGNATURE"},
+	{STATUS_PNP_REBOOT_REQUIRED, -EIO, "STATUS_PNP_REBOOT_REQUIRED"},
+	{STATUS_POWER_STATE_INVALID, -EIO, "STATUS_POWER_STATE_INVALID"},
+	{STATUS_DS_INVALID_GROUP_TYPE, -EIO, "STATUS_DS_INVALID_GROUP_TYPE"},
+	{STATUS_DS_NO_NEST_GLOBALGROUP_IN_MIXEDDOMAIN, -EIO,
+	"STATUS_DS_NO_NEST_GLOBALGROUP_IN_MIXEDDOMAIN"},
+	{STATUS_DS_NO_NEST_LOCALGROUP_IN_MIXEDDOMAIN, -EIO,
+	"STATUS_DS_NO_NEST_LOCALGROUP_IN_MIXEDDOMAIN"},
+	{STATUS_DS_GLOBAL_CANT_HAVE_LOCAL_MEMBER, -EIO,
+	"STATUS_DS_GLOBAL_CANT_HAVE_LOCAL_MEMBER"},
+	{STATUS_DS_GLOBAL_CANT_HAVE_UNIVERSAL_MEMBER, -EIO,
+	"STATUS_DS_GLOBAL_CANT_HAVE_UNIVERSAL_MEMBER"},
+	{STATUS_DS_UNIVERSAL_CANT_HAVE_LOCAL_MEMBER, -EIO,
+	"STATUS_DS_UNIVERSAL_CANT_HAVE_LOCAL_MEMBER"},
+	{STATUS_DS_GLOBAL_CANT_HAVE_CROSSDOMAIN_MEMBER, -EIO,
+	"STATUS_DS_GLOBAL_CANT_HAVE_CROSSDOMAIN_MEMBER"},
+	{STATUS_DS_LOCAL_CANT_HAVE_CROSSDOMAIN_LOCAL_MEMBER, -EIO,
+	"STATUS_DS_LOCAL_CANT_HAVE_CROSSDOMAIN_LOCAL_MEMBER"},
+	{STATUS_DS_HAVE_PRIMARY_MEMBERS, -EIO,
+	"STATUS_DS_HAVE_PRIMARY_MEMBERS"},
+	{STATUS_WMI_NOT_SUPPORTED, -EOPNOTSUPP, "STATUS_WMI_NOT_SUPPORTED"},
+	{STATUS_INSUFFICIENT_POWER, -EIO, "STATUS_INSUFFICIENT_POWER"},
+	{STATUS_SAM_NEED_BOOTKEY_PASSWORD, -EIO,
+	"STATUS_SAM_NEED_BOOTKEY_PASSWORD"},
+	{STATUS_SAM_NEED_BOOTKEY_FLOPPY, -EIO,
+	"STATUS_SAM_NEED_BOOTKEY_FLOPPY"},
+	{STATUS_DS_CANT_START, -EIO, "STATUS_DS_CANT_START"},
+	{STATUS_DS_INIT_FAILURE, -EIO, "STATUS_DS_INIT_FAILURE"},
+	{STATUS_SAM_INIT_FAILURE, -EIO, "STATUS_SAM_INIT_FAILURE"},
+	{STATUS_DS_GC_REQUIRED, -EIO, "STATUS_DS_GC_REQUIRED"},
+	{STATUS_DS_LOCAL_MEMBER_OF_LOCAL_ONLY, -EIO,
+	"STATUS_DS_LOCAL_MEMBER_OF_LOCAL_ONLY"},
+	{STATUS_DS_NO_FPO_IN_UNIVERSAL_GROUPS, -EIO,
+	"STATUS_DS_NO_FPO_IN_UNIVERSAL_GROUPS"},
+	{STATUS_DS_MACHINE_ACCOUNT_QUOTA_EXCEEDED, -EDQUOT,
+	"STATUS_DS_MACHINE_ACCOUNT_QUOTA_EXCEEDED"},
+	{STATUS_MULTIPLE_FAULT_VIOLATION, -EIO,
+	"STATUS_MULTIPLE_FAULT_VIOLATION"},
+	{STATUS_CURRENT_DOMAIN_NOT_ALLOWED, -EIO,
+	"STATUS_CURRENT_DOMAIN_NOT_ALLOWED"},
+	{STATUS_CANNOT_MAKE, -EIO, "STATUS_CANNOT_MAKE"},
+	{STATUS_SYSTEM_SHUTDOWN, -EIO, "STATUS_SYSTEM_SHUTDOWN"},
+	{STATUS_DS_INIT_FAILURE_CONSOLE, -EIO,
+	"STATUS_DS_INIT_FAILURE_CONSOLE"},
+	{STATUS_DS_SAM_INIT_FAILURE_CONSOLE, -EIO,
+	"STATUS_DS_SAM_INIT_FAILURE_CONSOLE"},
+	{STATUS_UNFINISHED_CONTEXT_DELETED, -EIO,
+	"STATUS_UNFINISHED_CONTEXT_DELETED"},
+	{STATUS_NO_TGT_REPLY, -EIO, "STATUS_NO_TGT_REPLY"},
+	/* Note that ENOATTTR and ENODATA are the same errno */
+	{STATUS_OBJECTID_NOT_FOUND, -ENODATA, "STATUS_OBJECTID_NOT_FOUND"},
+	{STATUS_NO_IP_ADDRESSES, -EIO, "STATUS_NO_IP_ADDRESSES"},
+	{STATUS_WRONG_CREDENTIAL_HANDLE, -EIO,
+	"STATUS_WRONG_CREDENTIAL_HANDLE"},
+	{STATUS_CRYPTO_SYSTEM_INVALID, -EIO, "STATUS_CRYPTO_SYSTEM_INVALID"},
+	{STATUS_MAX_REFERRALS_EXCEEDED, -EIO, "STATUS_MAX_REFERRALS_EXCEEDED"},
+	{STATUS_MUST_BE_KDC, -EIO, "STATUS_MUST_BE_KDC"},
+	{STATUS_STRONG_CRYPTO_NOT_SUPPORTED, -EIO,
+	"STATUS_STRONG_CRYPTO_NOT_SUPPORTED"},
+	{STATUS_TOO_MANY_PRINCIPALS, -EIO, "STATUS_TOO_MANY_PRINCIPALS"},
+	{STATUS_NO_PA_DATA, -EIO, "STATUS_NO_PA_DATA"},
+	{STATUS_PKINIT_NAME_MISMATCH, -EIO, "STATUS_PKINIT_NAME_MISMATCH"},
+	{STATUS_SMARTCARD_LOGON_REQUIRED, -EIO,
+	"STATUS_SMARTCARD_LOGON_REQUIRED"},
+	{STATUS_KDC_INVALID_REQUEST, -EIO, "STATUS_KDC_INVALID_REQUEST"},
+	{STATUS_KDC_UNABLE_TO_REFER, -EIO, "STATUS_KDC_UNABLE_TO_REFER"},
+	{STATUS_KDC_UNKNOWN_ETYPE, -EIO, "STATUS_KDC_UNKNOWN_ETYPE"},
+	{STATUS_SHUTDOWN_IN_PROGRESS, -EIO, "STATUS_SHUTDOWN_IN_PROGRESS"},
+	{STATUS_SERVER_SHUTDOWN_IN_PROGRESS, -EIO,
+	"STATUS_SERVER_SHUTDOWN_IN_PROGRESS"},
+	{STATUS_NOT_SUPPORTED_ON_SBS, -EOPNOTSUPP,
+	"STATUS_NOT_SUPPORTED_ON_SBS"},
+	{STATUS_WMI_GUID_DISCONNECTED, -EIO, "STATUS_WMI_GUID_DISCONNECTED"},
+	{STATUS_WMI_ALREADY_DISABLED, -EIO, "STATUS_WMI_ALREADY_DISABLED"},
+	{STATUS_WMI_ALREADY_ENABLED, -EIO, "STATUS_WMI_ALREADY_ENABLED"},
+	{STATUS_MFT_TOO_FRAGMENTED, -EIO, "STATUS_MFT_TOO_FRAGMENTED"},
+	{STATUS_COPY_PROTECTION_FAILURE, -EIO,
+	"STATUS_COPY_PROTECTION_FAILURE"},
+	{STATUS_CSS_AUTHENTICATION_FAILURE, -EIO,
+	"STATUS_CSS_AUTHENTICATION_FAILURE"},
+	{STATUS_CSS_KEY_NOT_PRESENT, -EIO, "STATUS_CSS_KEY_NOT_PRESENT"},
+	{STATUS_CSS_KEY_NOT_ESTABLISHED, -EIO,
+	"STATUS_CSS_KEY_NOT_ESTABLISHED"},
+	{STATUS_CSS_SCRAMBLED_SECTOR, -EIO, "STATUS_CSS_SCRAMBLED_SECTOR"},
+	{STATUS_CSS_REGION_MISMATCH, -EIO, "STATUS_CSS_REGION_MISMATCH"},
+	{STATUS_CSS_RESETS_EXHAUSTED, -EIO, "STATUS_CSS_RESETS_EXHAUSTED"},
+	{STATUS_PKINIT_FAILURE, -EIO, "STATUS_PKINIT_FAILURE"},
+	{STATUS_SMARTCARD_SUBSYSTEM_FAILURE, -EIO,
+	"STATUS_SMARTCARD_SUBSYSTEM_FAILURE"},
+	{STATUS_NO_KERB_KEY, -EIO, "STATUS_NO_KERB_KEY"},
+	{STATUS_HOST_DOWN, -EIO, "STATUS_HOST_DOWN"},
+	{STATUS_UNSUPPORTED_PREAUTH, -EIO, "STATUS_UNSUPPORTED_PREAUTH"},
+	{STATUS_EFS_ALG_BLOB_TOO_BIG, -EIO, "STATUS_EFS_ALG_BLOB_TOO_BIG"},
+	{STATUS_PORT_NOT_SET, -EIO, "STATUS_PORT_NOT_SET"},
+	{STATUS_DEBUGGER_INACTIVE, -EIO, "STATUS_DEBUGGER_INACTIVE"},
+	{STATUS_DS_VERSION_CHECK_FAILURE, -EIO,
+	"STATUS_DS_VERSION_CHECK_FAILURE"},
+	{STATUS_AUDITING_DISABLED, -EIO, "STATUS_AUDITING_DISABLED"},
+	{STATUS_PRENT4_MACHINE_ACCOUNT, -EIO, "STATUS_PRENT4_MACHINE_ACCOUNT"},
+	{STATUS_DS_AG_CANT_HAVE_UNIVERSAL_MEMBER, -EIO,
+	"STATUS_DS_AG_CANT_HAVE_UNIVERSAL_MEMBER"},
+	{STATUS_INVALID_IMAGE_WIN_32, -EIO, "STATUS_INVALID_IMAGE_WIN_32"},
+	{STATUS_INVALID_IMAGE_WIN_64, -EIO, "STATUS_INVALID_IMAGE_WIN_64"},
+	{STATUS_BAD_BINDINGS, -EIO, "STATUS_BAD_BINDINGS"},
+	{STATUS_NETWORK_SESSION_EXPIRED, -EIO,
+	"STATUS_NETWORK_SESSION_EXPIRED"},
+	{STATUS_APPHELP_BLOCK, -EIO, "STATUS_APPHELP_BLOCK"},
+	{STATUS_ALL_SIDS_FILTERED, -EIO, "STATUS_ALL_SIDS_FILTERED"},
+	{STATUS_NOT_SAFE_MODE_DRIVER, -EIO, "STATUS_NOT_SAFE_MODE_DRIVER"},
+	{STATUS_ACCESS_DISABLED_BY_POLICY_DEFAULT, -EACCES,
+	"STATUS_ACCESS_DISABLED_BY_POLICY_DEFAULT"},
+	{STATUS_ACCESS_DISABLED_BY_POLICY_PATH, -EACCES,
+	"STATUS_ACCESS_DISABLED_BY_POLICY_PATH"},
+	{STATUS_ACCESS_DISABLED_BY_POLICY_PUBLISHER, -EACCES,
+	"STATUS_ACCESS_DISABLED_BY_POLICY_PUBLISHER"},
+	{STATUS_ACCESS_DISABLED_BY_POLICY_OTHER, -EACCES,
+	"STATUS_ACCESS_DISABLED_BY_POLICY_OTHER"},
+	{STATUS_FAILED_DRIVER_ENTRY, -EIO, "STATUS_FAILED_DRIVER_ENTRY"},
+	{STATUS_DEVICE_ENUMERATION_ERROR, -EIO,
+	"STATUS_DEVICE_ENUMERATION_ERROR"},
+	{STATUS_MOUNT_POINT_NOT_RESOLVED, -EIO,
+	"STATUS_MOUNT_POINT_NOT_RESOLVED"},
+	{STATUS_INVALID_DEVICE_OBJECT_PARAMETER, -EIO,
+	"STATUS_INVALID_DEVICE_OBJECT_PARAMETER"},
+	{STATUS_MCA_OCCURED, -EIO, "STATUS_MCA_OCCURED"},
+	{STATUS_DRIVER_BLOCKED_CRITICAL, -EIO,
+	"STATUS_DRIVER_BLOCKED_CRITICAL"},
+	{STATUS_DRIVER_BLOCKED, -EIO, "STATUS_DRIVER_BLOCKED"},
+	{STATUS_DRIVER_DATABASE_ERROR, -EIO, "STATUS_DRIVER_DATABASE_ERROR"},
+	{STATUS_SYSTEM_HIVE_TOO_LARGE, -EIO, "STATUS_SYSTEM_HIVE_TOO_LARGE"},
+	{STATUS_INVALID_IMPORT_OF_NON_DLL, -EIO,
+	"STATUS_INVALID_IMPORT_OF_NON_DLL"},
+	{STATUS_NO_SECRETS, -EIO, "STATUS_NO_SECRETS"},
+	{STATUS_ACCESS_DISABLED_NO_SAFER_UI_BY_POLICY, -EACCES,
+	"STATUS_ACCESS_DISABLED_NO_SAFER_UI_BY_POLICY"},
+	{STATUS_FAILED_STACK_SWITCH, -EIO, "STATUS_FAILED_STACK_SWITCH"},
+	{STATUS_HEAP_CORRUPTION, -EIO, "STATUS_HEAP_CORRUPTION"},
+	{STATUS_SMARTCARD_WRONG_PIN, -EIO, "STATUS_SMARTCARD_WRONG_PIN"},
+	{STATUS_SMARTCARD_CARD_BLOCKED, -EIO, "STATUS_SMARTCARD_CARD_BLOCKED"},
+	{STATUS_SMARTCARD_CARD_NOT_AUTHENTICATED, -EIO,
+	"STATUS_SMARTCARD_CARD_NOT_AUTHENTICATED"},
+	{STATUS_SMARTCARD_NO_CARD, -EIO, "STATUS_SMARTCARD_NO_CARD"},
+	{STATUS_SMARTCARD_NO_KEY_CONTAINER, -EIO,
+	"STATUS_SMARTCARD_NO_KEY_CONTAINER"},
+	{STATUS_SMARTCARD_NO_CERTIFICATE, -EIO,
+	"STATUS_SMARTCARD_NO_CERTIFICATE"},
+	{STATUS_SMARTCARD_NO_KEYSET, -EIO, "STATUS_SMARTCARD_NO_KEYSET"},
+	{STATUS_SMARTCARD_IO_ERROR, -EIO, "STATUS_SMARTCARD_IO_ERROR"},
+	{STATUS_DOWNGRADE_DETECTED, -EIO, "STATUS_DOWNGRADE_DETECTED"},
+	{STATUS_SMARTCARD_CERT_REVOKED, -EIO, "STATUS_SMARTCARD_CERT_REVOKED"},
+	{STATUS_ISSUING_CA_UNTRUSTED, -EIO, "STATUS_ISSUING_CA_UNTRUSTED"},
+	{STATUS_REVOCATION_OFFLINE_C, -EIO, "STATUS_REVOCATION_OFFLINE_C"},
+	{STATUS_PKINIT_CLIENT_FAILURE, -EIO, "STATUS_PKINIT_CLIENT_FAILURE"},
+	{STATUS_SMARTCARD_CERT_EXPIRED, -EIO, "STATUS_SMARTCARD_CERT_EXPIRED"},
+	{STATUS_DRIVER_FAILED_PRIOR_UNLOAD, -EIO,
+	"STATUS_DRIVER_FAILED_PRIOR_UNLOAD"},
+	{STATUS_SMARTCARD_SILENT_CONTEXT, -EIO,
+	"STATUS_SMARTCARD_SILENT_CONTEXT"},
+	{STATUS_PER_USER_TRUST_QUOTA_EXCEEDED, -EDQUOT,
+	"STATUS_PER_USER_TRUST_QUOTA_EXCEEDED"},
+	{STATUS_ALL_USER_TRUST_QUOTA_EXCEEDED, -EDQUOT,
+	"STATUS_ALL_USER_TRUST_QUOTA_EXCEEDED"},
+	{STATUS_USER_DELETE_TRUST_QUOTA_EXCEEDED, -EDQUOT,
+	"STATUS_USER_DELETE_TRUST_QUOTA_EXCEEDED"},
+	{STATUS_DS_NAME_NOT_UNIQUE, -EIO, "STATUS_DS_NAME_NOT_UNIQUE"},
+	{STATUS_DS_DUPLICATE_ID_FOUND, -EIO, "STATUS_DS_DUPLICATE_ID_FOUND"},
+	{STATUS_DS_GROUP_CONVERSION_ERROR, -EIO,
+	"STATUS_DS_GROUP_CONVERSION_ERROR"},
+	{STATUS_VOLSNAP_PREPARE_HIBERNATE, -EIO,
+	"STATUS_VOLSNAP_PREPARE_HIBERNATE"},
+	{STATUS_USER2USER_REQUIRED, -EIO, "STATUS_USER2USER_REQUIRED"},
+	{STATUS_STACK_BUFFER_OVERRUN, -EIO, "STATUS_STACK_BUFFER_OVERRUN"},
+	{STATUS_NO_S4U_PROT_SUPPORT, -EIO, "STATUS_NO_S4U_PROT_SUPPORT"},
+	{STATUS_CROSSREALM_DELEGATION_FAILURE, -EIO,
+	"STATUS_CROSSREALM_DELEGATION_FAILURE"},
+	{STATUS_REVOCATION_OFFLINE_KDC, -EIO, "STATUS_REVOCATION_OFFLINE_KDC"},
+	{STATUS_ISSUING_CA_UNTRUSTED_KDC, -EIO,
+	"STATUS_ISSUING_CA_UNTRUSTED_KDC"},
+	{STATUS_KDC_CERT_EXPIRED, -EIO, "STATUS_KDC_CERT_EXPIRED"},
+	{STATUS_KDC_CERT_REVOKED, -EIO, "STATUS_KDC_CERT_REVOKED"},
+	{STATUS_PARAMETER_QUOTA_EXCEEDED, -EDQUOT,
+	"STATUS_PARAMETER_QUOTA_EXCEEDED"},
+	{STATUS_HIBERNATION_FAILURE, -EIO, "STATUS_HIBERNATION_FAILURE"},
+	{STATUS_DELAY_LOAD_FAILED, -EIO, "STATUS_DELAY_LOAD_FAILED"},
+	{STATUS_AUTHENTICATION_FIREWALL_FAILED, -EIO,
+	"STATUS_AUTHENTICATION_FIREWALL_FAILED"},
+	{STATUS_VDM_DISALLOWED, -EIO, "STATUS_VDM_DISALLOWED"},
+	{STATUS_HUNG_DISPLAY_DRIVER_THREAD, -EIO,
+	"STATUS_HUNG_DISPLAY_DRIVER_THREAD"},
+	{STATUS_INSUFFICIENT_RESOURCE_FOR_SPECIFIED_SHARED_SECTION_SIZE, -EIO,
+	"STATUS_INSUFFICIENT_RESOURCE_FOR_SPECIFIED_SHARED_SECTION_SIZE"},
+	{STATUS_INVALID_CRUNTIME_PARAMETER, -EIO,
+	"STATUS_INVALID_CRUNTIME_PARAMETER"},
+	{STATUS_NTLM_BLOCKED, -EIO, "STATUS_NTLM_BLOCKED"},
+	{STATUS_ASSERTION_FAILURE, -EIO, "STATUS_ASSERTION_FAILURE"},
+	{STATUS_VERIFIER_STOP, -EIO, "STATUS_VERIFIER_STOP"},
+	{STATUS_CALLBACK_POP_STACK, -EIO, "STATUS_CALLBACK_POP_STACK"},
+	{STATUS_INCOMPATIBLE_DRIVER_BLOCKED, -EIO,
+	"STATUS_INCOMPATIBLE_DRIVER_BLOCKED"},
+	{STATUS_HIVE_UNLOADED, -EIO, "STATUS_HIVE_UNLOADED"},
+	{STATUS_COMPRESSION_DISABLED, -EIO, "STATUS_COMPRESSION_DISABLED"},
+	{STATUS_FILE_SYSTEM_LIMITATION, -EIO, "STATUS_FILE_SYSTEM_LIMITATION"},
+	{STATUS_INVALID_IMAGE_HASH, -EIO, "STATUS_INVALID_IMAGE_HASH"},
+	{STATUS_NOT_CAPABLE, -EIO, "STATUS_NOT_CAPABLE"},
+	{STATUS_REQUEST_OUT_OF_SEQUENCE, -EIO,
+	"STATUS_REQUEST_OUT_OF_SEQUENCE"},
+	{STATUS_IMPLEMENTATION_LIMIT, -EIO, "STATUS_IMPLEMENTATION_LIMIT"},
+	{STATUS_ELEVATION_REQUIRED, -EIO, "STATUS_ELEVATION_REQUIRED"},
+	{STATUS_BEYOND_VDL, -EIO, "STATUS_BEYOND_VDL"},
+	{STATUS_ENCOUNTERED_WRITE_IN_PROGRESS, -EIO,
+	"STATUS_ENCOUNTERED_WRITE_IN_PROGRESS"},
+	{STATUS_PTE_CHANGED, -EIO, "STATUS_PTE_CHANGED"},
+	{STATUS_PURGE_FAILED, -EIO, "STATUS_PURGE_FAILED"},
+	{STATUS_CRED_REQUIRES_CONFIRMATION, -EIO,
+	"STATUS_CRED_REQUIRES_CONFIRMATION"},
+	{STATUS_CS_ENCRYPTION_INVALID_SERVER_RESPONSE, -EIO,
+	"STATUS_CS_ENCRYPTION_INVALID_SERVER_RESPONSE"},
+	{STATUS_CS_ENCRYPTION_UNSUPPORTED_SERVER, -EIO,
+	"STATUS_CS_ENCRYPTION_UNSUPPORTED_SERVER"},
+	{STATUS_CS_ENCRYPTION_EXISTING_ENCRYPTED_FILE, -EIO,
+	"STATUS_CS_ENCRYPTION_EXISTING_ENCRYPTED_FILE"},
+	{STATUS_CS_ENCRYPTION_NEW_ENCRYPTED_FILE, -EIO,
+	"STATUS_CS_ENCRYPTION_NEW_ENCRYPTED_FILE"},
+	{STATUS_CS_ENCRYPTION_FILE_NOT_CSE, -EIO,
+	"STATUS_CS_ENCRYPTION_FILE_NOT_CSE"},
+	{STATUS_INVALID_LABEL, -EIO, "STATUS_INVALID_LABEL"},
+	{STATUS_DRIVER_PROCESS_TERMINATED, -EIO,
+	"STATUS_DRIVER_PROCESS_TERMINATED"},
+	{STATUS_AMBIGUOUS_SYSTEM_DEVICE, -EIO,
+	"STATUS_AMBIGUOUS_SYSTEM_DEVICE"},
+	{STATUS_SYSTEM_DEVICE_NOT_FOUND, -EIO,
+	"STATUS_SYSTEM_DEVICE_NOT_FOUND"},
+	{STATUS_RESTART_BOOT_APPLICATION, -EIO,
+	"STATUS_RESTART_BOOT_APPLICATION"},
+	{STATUS_INVALID_TASK_NAME, -EIO, "STATUS_INVALID_TASK_NAME"},
+	{STATUS_INVALID_TASK_INDEX, -EIO, "STATUS_INVALID_TASK_INDEX"},
+	{STATUS_THREAD_ALREADY_IN_TASK, -EIO, "STATUS_THREAD_ALREADY_IN_TASK"},
+	{STATUS_CALLBACK_BYPASS, -EIO, "STATUS_CALLBACK_BYPASS"},
+	{STATUS_PORT_CLOSED, -EIO, "STATUS_PORT_CLOSED"},
+	{STATUS_MESSAGE_LOST, -EIO, "STATUS_MESSAGE_LOST"},
+	{STATUS_INVALID_MESSAGE, -EIO, "STATUS_INVALID_MESSAGE"},
+	{STATUS_REQUEST_CANCELED, -EIO, "STATUS_REQUEST_CANCELED"},
+	{STATUS_RECURSIVE_DISPATCH, -EIO, "STATUS_RECURSIVE_DISPATCH"},
+	{STATUS_LPC_RECEIVE_BUFFER_EXPECTED, -EIO,
+	"STATUS_LPC_RECEIVE_BUFFER_EXPECTED"},
+	{STATUS_LPC_INVALID_CONNECTION_USAGE, -EIO,
+	"STATUS_LPC_INVALID_CONNECTION_USAGE"},
+	{STATUS_LPC_REQUESTS_NOT_ALLOWED, -EIO,
+	"STATUS_LPC_REQUESTS_NOT_ALLOWED"},
+	{STATUS_RESOURCE_IN_USE, -EIO, "STATUS_RESOURCE_IN_USE"},
+	{STATUS_HARDWARE_MEMORY_ERROR, -EIO, "STATUS_HARDWARE_MEMORY_ERROR"},
+	{STATUS_THREADPOOL_HANDLE_EXCEPTION, -EIO,
+	"STATUS_THREADPOOL_HANDLE_EXCEPTION"},
+	{STATUS_THREADPOOL_SET_EVENT_ON_COMPLETION_FAILED, -EIO,
+	"STATUS_THREADPOOL_SET_EVENT_ON_COMPLETION_FAILED"},
+	{STATUS_THREADPOOL_RELEASE_SEMAPHORE_ON_COMPLETION_FAILED, -EIO,
+	"STATUS_THREADPOOL_RELEASE_SEMAPHORE_ON_COMPLETION_FAILED"},
+	{STATUS_THREADPOOL_RELEASE_MUTEX_ON_COMPLETION_FAILED, -EIO,
+	"STATUS_THREADPOOL_RELEASE_MUTEX_ON_COMPLETION_FAILED"},
+	{STATUS_THREADPOOL_FREE_LIBRARY_ON_COMPLETION_FAILED, -EIO,
+	"STATUS_THREADPOOL_FREE_LIBRARY_ON_COMPLETION_FAILED"},
+	{STATUS_THREADPOOL_RELEASED_DURING_OPERATION, -EIO,
+	"STATUS_THREADPOOL_RELEASED_DURING_OPERATION"},
+	{STATUS_CALLBACK_RETURNED_WHILE_IMPERSONATING, -EIO,
+	"STATUS_CALLBACK_RETURNED_WHILE_IMPERSONATING"},
+	{STATUS_APC_RETURNED_WHILE_IMPERSONATING, -EIO,
+	"STATUS_APC_RETURNED_WHILE_IMPERSONATING"},
+	{STATUS_PROCESS_IS_PROTECTED, -EIO, "STATUS_PROCESS_IS_PROTECTED"},
+	{STATUS_MCA_EXCEPTION, -EIO, "STATUS_MCA_EXCEPTION"},
+	{STATUS_CERTIFICATE_MAPPING_NOT_UNIQUE, -EIO,
+	"STATUS_CERTIFICATE_MAPPING_NOT_UNIQUE"},
+	{STATUS_SYMLINK_CLASS_DISABLED, -EIO, "STATUS_SYMLINK_CLASS_DISABLED"},
+	{STATUS_INVALID_IDN_NORMALIZATION, -EIO,
+	"STATUS_INVALID_IDN_NORMALIZATION"},
+	{STATUS_NO_UNICODE_TRANSLATION, -EIO, "STATUS_NO_UNICODE_TRANSLATION"},
+	{STATUS_ALREADY_REGISTERED, -EIO, "STATUS_ALREADY_REGISTERED"},
+	{STATUS_CONTEXT_MISMATCH, -EIO, "STATUS_CONTEXT_MISMATCH"},
+	{STATUS_PORT_ALREADY_HAS_COMPLETION_LIST, -EIO,
+	"STATUS_PORT_ALREADY_HAS_COMPLETION_LIST"},
+	{STATUS_CALLBACK_RETURNED_THREAD_PRIORITY, -EIO,
+	"STATUS_CALLBACK_RETURNED_THREAD_PRIORITY"},
+	{STATUS_INVALID_THREAD, -EIO, "STATUS_INVALID_THREAD"},
+	{STATUS_CALLBACK_RETURNED_TRANSACTION, -EIO,
+	"STATUS_CALLBACK_RETURNED_TRANSACTION"},
+	{STATUS_CALLBACK_RETURNED_LDR_LOCK, -EIO,
+	"STATUS_CALLBACK_RETURNED_LDR_LOCK"},
+	{STATUS_CALLBACK_RETURNED_LANG, -EIO, "STATUS_CALLBACK_RETURNED_LANG"},
+	{STATUS_CALLBACK_RETURNED_PRI_BACK, -EIO,
+	"STATUS_CALLBACK_RETURNED_PRI_BACK"},
+	{STATUS_CALLBACK_RETURNED_THREAD_AFFINITY, -EIO,
+	"STATUS_CALLBACK_RETURNED_THREAD_AFFINITY"},
+	{STATUS_DISK_REPAIR_DISABLED, -EIO, "STATUS_DISK_REPAIR_DISABLED"},
+	{STATUS_DS_DOMAIN_RENAME_IN_PROGRESS, -EIO,
+	"STATUS_DS_DOMAIN_RENAME_IN_PROGRESS"},
+	{STATUS_DISK_QUOTA_EXCEEDED, -EDQUOT, "STATUS_DISK_QUOTA_EXCEEDED"},
+	{STATUS_CONTENT_BLOCKED, -EIO, "STATUS_CONTENT_BLOCKED"},
+	{STATUS_BAD_CLUSTERS, -EIO, "STATUS_BAD_CLUSTERS"},
+	{STATUS_VOLUME_DIRTY, -EIO, "STATUS_VOLUME_DIRTY"},
+	{STATUS_FILE_CHECKED_OUT, -EIO, "STATUS_FILE_CHECKED_OUT"},
+	{STATUS_CHECKOUT_REQUIRED, -EIO, "STATUS_CHECKOUT_REQUIRED"},
+	{STATUS_BAD_FILE_TYPE, -EIO, "STATUS_BAD_FILE_TYPE"},
+	{STATUS_FILE_TOO_LARGE, -EIO, "STATUS_FILE_TOO_LARGE"},
+	{STATUS_FORMS_AUTH_REQUIRED, -EIO, "STATUS_FORMS_AUTH_REQUIRED"},
+	{STATUS_VIRUS_INFECTED, -EIO, "STATUS_VIRUS_INFECTED"},
+	{STATUS_VIRUS_DELETED, -EIO, "STATUS_VIRUS_DELETED"},
+	{STATUS_BAD_MCFG_TABLE, -EIO, "STATUS_BAD_MCFG_TABLE"},
+	{STATUS_WOW_ASSERTION, -EIO, "STATUS_WOW_ASSERTION"},
+	{STATUS_INVALID_SIGNATURE, -EIO, "STATUS_INVALID_SIGNATURE"},
+	{STATUS_HMAC_NOT_SUPPORTED, -EIO, "STATUS_HMAC_NOT_SUPPORTED"},
+	{STATUS_IPSEC_QUEUE_OVERFLOW, -EIO, "STATUS_IPSEC_QUEUE_OVERFLOW"},
+	{STATUS_ND_QUEUE_OVERFLOW, -EIO, "STATUS_ND_QUEUE_OVERFLOW"},
+	{STATUS_HOPLIMIT_EXCEEDED, -EIO, "STATUS_HOPLIMIT_EXCEEDED"},
+	{STATUS_PROTOCOL_NOT_SUPPORTED, -EOPNOTSUPP,
+	"STATUS_PROTOCOL_NOT_SUPPORTED"},
+	{STATUS_LOST_WRITEBEHIND_DATA_NETWORK_DISCONNECTED, -EIO,
+	"STATUS_LOST_WRITEBEHIND_DATA_NETWORK_DISCONNECTED"},
+	{STATUS_LOST_WRITEBEHIND_DATA_NETWORK_SERVER_ERROR, -EIO,
+	"STATUS_LOST_WRITEBEHIND_DATA_NETWORK_SERVER_ERROR"},
+	{STATUS_LOST_WRITEBEHIND_DATA_LOCAL_DISK_ERROR, -EIO,
+	"STATUS_LOST_WRITEBEHIND_DATA_LOCAL_DISK_ERROR"},
+	{STATUS_XML_PARSE_ERROR, -EIO, "STATUS_XML_PARSE_ERROR"},
+	{STATUS_XMLDSIG_ERROR, -EIO, "STATUS_XMLDSIG_ERROR"},
+	{STATUS_WRONG_COMPARTMENT, -EIO, "STATUS_WRONG_COMPARTMENT"},
+	{STATUS_AUTHIP_FAILURE, -EIO, "STATUS_AUTHIP_FAILURE"},
+	{DBG_NO_STATE_CHANGE, -EIO, "DBG_NO_STATE_CHANGE"},
+	{DBG_APP_NOT_IDLE, -EIO, "DBG_APP_NOT_IDLE"},
+	{RPC_NT_INVALID_STRING_BINDING, -EIO, "RPC_NT_INVALID_STRING_BINDING"},
+	{RPC_NT_WRONG_KIND_OF_BINDING, -EIO, "RPC_NT_WRONG_KIND_OF_BINDING"},
+	{RPC_NT_INVALID_BINDING, -EIO, "RPC_NT_INVALID_BINDING"},
+	{RPC_NT_PROTSEQ_NOT_SUPPORTED, -EOPNOTSUPP,
+	"RPC_NT_PROTSEQ_NOT_SUPPORTED"},
+	{RPC_NT_INVALID_RPC_PROTSEQ, -EIO, "RPC_NT_INVALID_RPC_PROTSEQ"},
+	{RPC_NT_INVALID_STRING_UUID, -EIO, "RPC_NT_INVALID_STRING_UUID"},
+	{RPC_NT_INVALID_ENDPOINT_FORMAT, -EIO,
+	"RPC_NT_INVALID_ENDPOINT_FORMAT"},
+	{RPC_NT_INVALID_NET_ADDR, -EIO, "RPC_NT_INVALID_NET_ADDR"},
+	{RPC_NT_NO_ENDPOINT_FOUND, -EIO, "RPC_NT_NO_ENDPOINT_FOUND"},
+	{RPC_NT_INVALID_TIMEOUT, -EINVAL, "RPC_NT_INVALID_TIMEOUT"},
+	{RPC_NT_OBJECT_NOT_FOUND, -ENOENT, "RPC_NT_OBJECT_NOT_FOUND"},
+	{RPC_NT_ALREADY_REGISTERED, -EIO, "RPC_NT_ALREADY_REGISTERED"},
+	{RPC_NT_TYPE_ALREADY_REGISTERED, -EIO,
+	"RPC_NT_TYPE_ALREADY_REGISTERED"},
+	{RPC_NT_ALREADY_LISTENING, -EIO, "RPC_NT_ALREADY_LISTENING"},
+	{RPC_NT_NO_PROTSEQS_REGISTERED, -EIO, "RPC_NT_NO_PROTSEQS_REGISTERED"},
+	{RPC_NT_NOT_LISTENING, -EIO, "RPC_NT_NOT_LISTENING"},
+	{RPC_NT_UNKNOWN_MGR_TYPE, -EIO, "RPC_NT_UNKNOWN_MGR_TYPE"},
+	{RPC_NT_UNKNOWN_IF, -EIO, "RPC_NT_UNKNOWN_IF"},
+	{RPC_NT_NO_BINDINGS, -EIO, "RPC_NT_NO_BINDINGS"},
+	{RPC_NT_NO_PROTSEQS, -EIO, "RPC_NT_NO_PROTSEQS"},
+	{RPC_NT_CANT_CREATE_ENDPOINT, -EIO, "RPC_NT_CANT_CREATE_ENDPOINT"},
+	{RPC_NT_OUT_OF_RESOURCES, -EIO, "RPC_NT_OUT_OF_RESOURCES"},
+	{RPC_NT_SERVER_UNAVAILABLE, -EIO, "RPC_NT_SERVER_UNAVAILABLE"},
+	{RPC_NT_SERVER_TOO_BUSY, -EBUSY, "RPC_NT_SERVER_TOO_BUSY"},
+	{RPC_NT_INVALID_NETWORK_OPTIONS, -EIO,
+	"RPC_NT_INVALID_NETWORK_OPTIONS"},
+	{RPC_NT_NO_CALL_ACTIVE, -EIO, "RPC_NT_NO_CALL_ACTIVE"},
+	{RPC_NT_CALL_FAILED, -EIO, "RPC_NT_CALL_FAILED"},
+	{RPC_NT_CALL_FAILED_DNE, -EIO, "RPC_NT_CALL_FAILED_DNE"},
+	{RPC_NT_PROTOCOL_ERROR, -EIO, "RPC_NT_PROTOCOL_ERROR"},
+	{RPC_NT_UNSUPPORTED_TRANS_SYN, -EIO, "RPC_NT_UNSUPPORTED_TRANS_SYN"},
+	{RPC_NT_UNSUPPORTED_TYPE, -EIO, "RPC_NT_UNSUPPORTED_TYPE"},
+	{RPC_NT_INVALID_TAG, -EIO, "RPC_NT_INVALID_TAG"},
+	{RPC_NT_INVALID_BOUND, -EIO, "RPC_NT_INVALID_BOUND"},
+	{RPC_NT_NO_ENTRY_NAME, -EIO, "RPC_NT_NO_ENTRY_NAME"},
+	{RPC_NT_INVALID_NAME_SYNTAX, -EIO, "RPC_NT_INVALID_NAME_SYNTAX"},
+	{RPC_NT_UNSUPPORTED_NAME_SYNTAX, -EIO,
+	"RPC_NT_UNSUPPORTED_NAME_SYNTAX"},
+	{RPC_NT_UUID_NO_ADDRESS, -EIO, "RPC_NT_UUID_NO_ADDRESS"},
+	{RPC_NT_DUPLICATE_ENDPOINT, -ENOTUNIQ, "RPC_NT_DUPLICATE_ENDPOINT"},
+	{RPC_NT_UNKNOWN_AUTHN_TYPE, -EIO, "RPC_NT_UNKNOWN_AUTHN_TYPE"},
+	{RPC_NT_MAX_CALLS_TOO_SMALL, -EIO, "RPC_NT_MAX_CALLS_TOO_SMALL"},
+	{RPC_NT_STRING_TOO_LONG, -EIO, "RPC_NT_STRING_TOO_LONG"},
+	{RPC_NT_PROTSEQ_NOT_FOUND, -EIO, "RPC_NT_PROTSEQ_NOT_FOUND"},
+	{RPC_NT_PROCNUM_OUT_OF_RANGE, -EIO, "RPC_NT_PROCNUM_OUT_OF_RANGE"},
+	{RPC_NT_BINDING_HAS_NO_AUTH, -EIO, "RPC_NT_BINDING_HAS_NO_AUTH"},
+	{RPC_NT_UNKNOWN_AUTHN_SERVICE, -EIO, "RPC_NT_UNKNOWN_AUTHN_SERVICE"},
+	{RPC_NT_UNKNOWN_AUTHN_LEVEL, -EIO, "RPC_NT_UNKNOWN_AUTHN_LEVEL"},
+	{RPC_NT_INVALID_AUTH_IDENTITY, -EIO, "RPC_NT_INVALID_AUTH_IDENTITY"},
+	{RPC_NT_UNKNOWN_AUTHZ_SERVICE, -EIO, "RPC_NT_UNKNOWN_AUTHZ_SERVICE"},
+	{EPT_NT_INVALID_ENTRY, -EIO, "EPT_NT_INVALID_ENTRY"},
+	{EPT_NT_CANT_PERFORM_OP, -EIO, "EPT_NT_CANT_PERFORM_OP"},
+	{EPT_NT_NOT_REGISTERED, -EIO, "EPT_NT_NOT_REGISTERED"},
+	{RPC_NT_NOTHING_TO_EXPORT, -EIO, "RPC_NT_NOTHING_TO_EXPORT"},
+	{RPC_NT_INCOMPLETE_NAME, -EIO, "RPC_NT_INCOMPLETE_NAME"},
+	{RPC_NT_INVALID_VERS_OPTION, -EIO, "RPC_NT_INVALID_VERS_OPTION"},
+	{RPC_NT_NO_MORE_MEMBERS, -EIO, "RPC_NT_NO_MORE_MEMBERS"},
+	{RPC_NT_NOT_ALL_OBJS_UNEXPORTED, -EIO,
+	"RPC_NT_NOT_ALL_OBJS_UNEXPORTED"},
+	{RPC_NT_INTERFACE_NOT_FOUND, -EIO, "RPC_NT_INTERFACE_NOT_FOUND"},
+	{RPC_NT_ENTRY_ALREADY_EXISTS, -EIO, "RPC_NT_ENTRY_ALREADY_EXISTS"},
+	{RPC_NT_ENTRY_NOT_FOUND, -EIO, "RPC_NT_ENTRY_NOT_FOUND"},
+	{RPC_NT_NAME_SERVICE_UNAVAILABLE, -EIO,
+	"RPC_NT_NAME_SERVICE_UNAVAILABLE"},
+	{RPC_NT_INVALID_NAF_ID, -EIO, "RPC_NT_INVALID_NAF_ID"},
+	{RPC_NT_CANNOT_SUPPORT, -EOPNOTSUPP, "RPC_NT_CANNOT_SUPPORT"},
+	{RPC_NT_NO_CONTEXT_AVAILABLE, -EIO, "RPC_NT_NO_CONTEXT_AVAILABLE"},
+	{RPC_NT_INTERNAL_ERROR, -EIO, "RPC_NT_INTERNAL_ERROR"},
+	{RPC_NT_ZERO_DIVIDE, -EIO, "RPC_NT_ZERO_DIVIDE"},
+	{RPC_NT_ADDRESS_ERROR, -EIO, "RPC_NT_ADDRESS_ERROR"},
+	{RPC_NT_FP_DIV_ZERO, -EIO, "RPC_NT_FP_DIV_ZERO"},
+	{RPC_NT_FP_UNDERFLOW, -EIO, "RPC_NT_FP_UNDERFLOW"},
+	{RPC_NT_FP_OVERFLOW, -EIO, "RPC_NT_FP_OVERFLOW"},
+	{RPC_NT_CALL_IN_PROGRESS, -EIO, "RPC_NT_CALL_IN_PROGRESS"},
+	{RPC_NT_NO_MORE_BINDINGS, -EIO, "RPC_NT_NO_MORE_BINDINGS"},
+	{RPC_NT_GROUP_MEMBER_NOT_FOUND, -EIO, "RPC_NT_GROUP_MEMBER_NOT_FOUND"},
+	{EPT_NT_CANT_CREATE, -EIO, "EPT_NT_CANT_CREATE"},
+	{RPC_NT_INVALID_OBJECT, -EIO, "RPC_NT_INVALID_OBJECT"},
+	{RPC_NT_NO_INTERFACES, -EIO, "RPC_NT_NO_INTERFACES"},
+	{RPC_NT_CALL_CANCELLED, -EIO, "RPC_NT_CALL_CANCELLED"},
+	{RPC_NT_BINDING_INCOMPLETE, -EIO, "RPC_NT_BINDING_INCOMPLETE"},
+	{RPC_NT_COMM_FAILURE, -EIO, "RPC_NT_COMM_FAILURE"},
+	{RPC_NT_UNSUPPORTED_AUTHN_LEVEL, -EIO,
+	"RPC_NT_UNSUPPORTED_AUTHN_LEVEL"},
+	{RPC_NT_NO_PRINC_NAME, -EIO, "RPC_NT_NO_PRINC_NAME"},
+	{RPC_NT_NOT_RPC_ERROR, -EIO, "RPC_NT_NOT_RPC_ERROR"},
+	{RPC_NT_SEC_PKG_ERROR, -EIO, "RPC_NT_SEC_PKG_ERROR"},
+	{RPC_NT_NOT_CANCELLED, -EIO, "RPC_NT_NOT_CANCELLED"},
+	{RPC_NT_INVALID_ASYNC_HANDLE, -EIO, "RPC_NT_INVALID_ASYNC_HANDLE"},
+	{RPC_NT_INVALID_ASYNC_CALL, -EIO, "RPC_NT_INVALID_ASYNC_CALL"},
+	{RPC_NT_PROXY_ACCESS_DENIED, -EACCES, "RPC_NT_PROXY_ACCESS_DENIED"},
+	{RPC_NT_NO_MORE_ENTRIES, -EIO, "RPC_NT_NO_MORE_ENTRIES"},
+	{RPC_NT_SS_CHAR_TRANS_OPEN_FAIL, -EIO,
+	"RPC_NT_SS_CHAR_TRANS_OPEN_FAIL"},
+	{RPC_NT_SS_CHAR_TRANS_SHORT_FILE, -EIO,
+	"RPC_NT_SS_CHAR_TRANS_SHORT_FILE"},
+	{RPC_NT_SS_IN_NULL_CONTEXT, -EIO, "RPC_NT_SS_IN_NULL_CONTEXT"},
+	{RPC_NT_SS_CONTEXT_MISMATCH, -EIO, "RPC_NT_SS_CONTEXT_MISMATCH"},
+	{RPC_NT_SS_CONTEXT_DAMAGED, -EIO, "RPC_NT_SS_CONTEXT_DAMAGED"},
+	{RPC_NT_SS_HANDLES_MISMATCH, -EIO, "RPC_NT_SS_HANDLES_MISMATCH"},
+	{RPC_NT_SS_CANNOT_GET_CALL_HANDLE, -EIO,
+	"RPC_NT_SS_CANNOT_GET_CALL_HANDLE"},
+	{RPC_NT_NULL_REF_POINTER, -EIO, "RPC_NT_NULL_REF_POINTER"},
+	{RPC_NT_ENUM_VALUE_OUT_OF_RANGE, -EIO,
+	"RPC_NT_ENUM_VALUE_OUT_OF_RANGE"},
+	{RPC_NT_BYTE_COUNT_TOO_SMALL, -EIO, "RPC_NT_BYTE_COUNT_TOO_SMALL"},
+	{RPC_NT_BAD_STUB_DATA, -EIO, "RPC_NT_BAD_STUB_DATA"},
+	{RPC_NT_INVALID_ES_ACTION, -EIO, "RPC_NT_INVALID_ES_ACTION"},
+	{RPC_NT_WRONG_ES_VERSION, -EIO, "RPC_NT_WRONG_ES_VERSION"},
+	{RPC_NT_WRONG_STUB_VERSION, -EIO, "RPC_NT_WRONG_STUB_VERSION"},
+	{RPC_NT_INVALID_PIPE_OBJECT, -EIO, "RPC_NT_INVALID_PIPE_OBJECT"},
+	{RPC_NT_INVALID_PIPE_OPERATION, -EIO, "RPC_NT_INVALID_PIPE_OPERATION"},
+	{RPC_NT_WRONG_PIPE_VERSION, -EIO, "RPC_NT_WRONG_PIPE_VERSION"},
+	{RPC_NT_PIPE_CLOSED, -EIO, "RPC_NT_PIPE_CLOSED"},
+	{RPC_NT_PIPE_DISCIPLINE_ERROR, -EIO, "RPC_NT_PIPE_DISCIPLINE_ERROR"},
+	{RPC_NT_PIPE_EMPTY, -EIO, "RPC_NT_PIPE_EMPTY"},
+	{STATUS_PNP_BAD_MPS_TABLE, -EIO, "STATUS_PNP_BAD_MPS_TABLE"},
+	{STATUS_PNP_TRANSLATION_FAILED, -EIO, "STATUS_PNP_TRANSLATION_FAILED"},
+	{STATUS_PNP_IRQ_TRANSLATION_FAILED, -EIO,
+	"STATUS_PNP_IRQ_TRANSLATION_FAILED"},
+	{STATUS_PNP_INVALID_ID, -EIO, "STATUS_PNP_INVALID_ID"},
+	{STATUS_IO_REISSUE_AS_CACHED, -EIO, "STATUS_IO_REISSUE_AS_CACHED"},
+	{STATUS_CTX_WINSTATION_NAME_INVALID, -EIO,
+	"STATUS_CTX_WINSTATION_NAME_INVALID"},
+	{STATUS_CTX_INVALID_PD, -EIO, "STATUS_CTX_INVALID_PD"},
+	{STATUS_CTX_PD_NOT_FOUND, -EIO, "STATUS_CTX_PD_NOT_FOUND"},
+	{STATUS_CTX_CLOSE_PENDING, -EIO, "STATUS_CTX_CLOSE_PENDING"},
+	{STATUS_CTX_NO_OUTBUF, -EIO, "STATUS_CTX_NO_OUTBUF"},
+	{STATUS_CTX_MODEM_INF_NOT_FOUND, -EIO,
+	"STATUS_CTX_MODEM_INF_NOT_FOUND"},
+	{STATUS_CTX_INVALID_MODEMNAME, -EIO, "STATUS_CTX_INVALID_MODEMNAME"},
+	{STATUS_CTX_RESPONSE_ERROR, -EIO, "STATUS_CTX_RESPONSE_ERROR"},
+	{STATUS_CTX_MODEM_RESPONSE_TIMEOUT, -ETIMEDOUT,
+	"STATUS_CTX_MODEM_RESPONSE_TIMEOUT"},
+	{STATUS_CTX_MODEM_RESPONSE_NO_CARRIER, -EIO,
+	"STATUS_CTX_MODEM_RESPONSE_NO_CARRIER"},
+	{STATUS_CTX_MODEM_RESPONSE_NO_DIALTONE, -EIO,
+	"STATUS_CTX_MODEM_RESPONSE_NO_DIALTONE"},
+	{STATUS_CTX_MODEM_RESPONSE_BUSY, -EBUSY,
+	"STATUS_CTX_MODEM_RESPONSE_BUSY"},
+	{STATUS_CTX_MODEM_RESPONSE_VOICE, -EIO,
+	"STATUS_CTX_MODEM_RESPONSE_VOICE"},
+	{STATUS_CTX_TD_ERROR, -EIO, "STATUS_CTX_TD_ERROR"},
+	{STATUS_CTX_LICENSE_CLIENT_INVALID, -EIO,
+	"STATUS_CTX_LICENSE_CLIENT_INVALID"},
+	{STATUS_CTX_LICENSE_NOT_AVAILABLE, -EIO,
+	"STATUS_CTX_LICENSE_NOT_AVAILABLE"},
+	{STATUS_CTX_LICENSE_EXPIRED, -EIO, "STATUS_CTX_LICENSE_EXPIRED"},
+	{STATUS_CTX_WINSTATION_NOT_FOUND, -EIO,
+	"STATUS_CTX_WINSTATION_NOT_FOUND"},
+	{STATUS_CTX_WINSTATION_NAME_COLLISION, -EIO,
+	"STATUS_CTX_WINSTATION_NAME_COLLISION"},
+	{STATUS_CTX_WINSTATION_BUSY, -EBUSY, "STATUS_CTX_WINSTATION_BUSY"},
+	{STATUS_CTX_BAD_VIDEO_MODE, -EIO, "STATUS_CTX_BAD_VIDEO_MODE"},
+	{STATUS_CTX_GRAPHICS_INVALID, -EIO, "STATUS_CTX_GRAPHICS_INVALID"},
+	{STATUS_CTX_NOT_CONSOLE, -EIO, "STATUS_CTX_NOT_CONSOLE"},
+	{STATUS_CTX_CLIENT_QUERY_TIMEOUT, -EIO,
+	"STATUS_CTX_CLIENT_QUERY_TIMEOUT"},
+	{STATUS_CTX_CONSOLE_DISCONNECT, -EIO, "STATUS_CTX_CONSOLE_DISCONNECT"},
+	{STATUS_CTX_CONSOLE_CONNECT, -EIO, "STATUS_CTX_CONSOLE_CONNECT"},
+	{STATUS_CTX_SHADOW_DENIED, -EIO, "STATUS_CTX_SHADOW_DENIED"},
+	{STATUS_CTX_WINSTATION_ACCESS_DENIED, -EACCES,
+	"STATUS_CTX_WINSTATION_ACCESS_DENIED"},
+	{STATUS_CTX_INVALID_WD, -EIO, "STATUS_CTX_INVALID_WD"},
+	{STATUS_CTX_WD_NOT_FOUND, -EIO, "STATUS_CTX_WD_NOT_FOUND"},
+	{STATUS_CTX_SHADOW_INVALID, -EIO, "STATUS_CTX_SHADOW_INVALID"},
+	{STATUS_CTX_SHADOW_DISABLED, -EIO, "STATUS_CTX_SHADOW_DISABLED"},
+	{STATUS_RDP_PROTOCOL_ERROR, -EIO, "STATUS_RDP_PROTOCOL_ERROR"},
+	{STATUS_CTX_CLIENT_LICENSE_NOT_SET, -EIO,
+	"STATUS_CTX_CLIENT_LICENSE_NOT_SET"},
+	{STATUS_CTX_CLIENT_LICENSE_IN_USE, -EIO,
+	"STATUS_CTX_CLIENT_LICENSE_IN_USE"},
+	{STATUS_CTX_SHADOW_ENDED_BY_MODE_CHANGE, -EIO,
+	"STATUS_CTX_SHADOW_ENDED_BY_MODE_CHANGE"},
+	{STATUS_CTX_SHADOW_NOT_RUNNING, -EIO, "STATUS_CTX_SHADOW_NOT_RUNNING"},
+	{STATUS_CTX_LOGON_DISABLED, -EIO, "STATUS_CTX_LOGON_DISABLED"},
+	{STATUS_CTX_SECURITY_LAYER_ERROR, -EIO,
+	"STATUS_CTX_SECURITY_LAYER_ERROR"},
+	{STATUS_TS_INCOMPATIBLE_SESSIONS, -EIO,
+	"STATUS_TS_INCOMPATIBLE_SESSIONS"},
+	{STATUS_MUI_FILE_NOT_FOUND, -EIO, "STATUS_MUI_FILE_NOT_FOUND"},
+	{STATUS_MUI_INVALID_FILE, -EIO, "STATUS_MUI_INVALID_FILE"},
+	{STATUS_MUI_INVALID_RC_CONFIG, -EIO, "STATUS_MUI_INVALID_RC_CONFIG"},
+	{STATUS_MUI_INVALID_LOCALE_NAME, -EIO,
+	"STATUS_MUI_INVALID_LOCALE_NAME"},
+	{STATUS_MUI_INVALID_ULTIMATEFALLBACK_NAME, -EIO,
+	"STATUS_MUI_INVALID_ULTIMATEFALLBACK_NAME"},
+	{STATUS_MUI_FILE_NOT_LOADED, -EIO, "STATUS_MUI_FILE_NOT_LOADED"},
+	{STATUS_RESOURCE_ENUM_USER_STOP, -EIO,
+	"STATUS_RESOURCE_ENUM_USER_STOP"},
+	{STATUS_CLUSTER_INVALID_NODE, -EIO, "STATUS_CLUSTER_INVALID_NODE"},
+	{STATUS_CLUSTER_NODE_EXISTS, -EIO, "STATUS_CLUSTER_NODE_EXISTS"},
+	{STATUS_CLUSTER_JOIN_IN_PROGRESS, -EIO,
+	"STATUS_CLUSTER_JOIN_IN_PROGRESS"},
+	{STATUS_CLUSTER_NODE_NOT_FOUND, -EIO, "STATUS_CLUSTER_NODE_NOT_FOUND"},
+	{STATUS_CLUSTER_LOCAL_NODE_NOT_FOUND, -EIO,
+	"STATUS_CLUSTER_LOCAL_NODE_NOT_FOUND"},
+	{STATUS_CLUSTER_NETWORK_EXISTS, -EIO, "STATUS_CLUSTER_NETWORK_EXISTS"},
+	{STATUS_CLUSTER_NETWORK_NOT_FOUND, -EIO,
+	"STATUS_CLUSTER_NETWORK_NOT_FOUND"},
+	{STATUS_CLUSTER_NETINTERFACE_EXISTS, -EIO,
+	"STATUS_CLUSTER_NETINTERFACE_EXISTS"},
+	{STATUS_CLUSTER_NETINTERFACE_NOT_FOUND, -EIO,
+	"STATUS_CLUSTER_NETINTERFACE_NOT_FOUND"},
+	{STATUS_CLUSTER_INVALID_REQUEST, -EIO,
+	"STATUS_CLUSTER_INVALID_REQUEST"},
+	{STATUS_CLUSTER_INVALID_NETWORK_PROVIDER, -EIO,
+	"STATUS_CLUSTER_INVALID_NETWORK_PROVIDER"},
+	{STATUS_CLUSTER_NODE_DOWN, -EIO, "STATUS_CLUSTER_NODE_DOWN"},
+	{STATUS_CLUSTER_NODE_UNREACHABLE, -EIO,
+	"STATUS_CLUSTER_NODE_UNREACHABLE"},
+	{STATUS_CLUSTER_NODE_NOT_MEMBER, -EIO,
+	"STATUS_CLUSTER_NODE_NOT_MEMBER"},
+	{STATUS_CLUSTER_JOIN_NOT_IN_PROGRESS, -EIO,
+	"STATUS_CLUSTER_JOIN_NOT_IN_PROGRESS"},
+	{STATUS_CLUSTER_INVALID_NETWORK, -EIO,
+	"STATUS_CLUSTER_INVALID_NETWORK"},
+	{STATUS_CLUSTER_NO_NET_ADAPTERS, -EIO,
+	"STATUS_CLUSTER_NO_NET_ADAPTERS"},
+	{STATUS_CLUSTER_NODE_UP, -EIO, "STATUS_CLUSTER_NODE_UP"},
+	{STATUS_CLUSTER_NODE_PAUSED, -EIO, "STATUS_CLUSTER_NODE_PAUSED"},
+	{STATUS_CLUSTER_NODE_NOT_PAUSED, -EIO,
+	"STATUS_CLUSTER_NODE_NOT_PAUSED"},
+	{STATUS_CLUSTER_NO_SECURITY_CONTEXT, -EIO,
+	"STATUS_CLUSTER_NO_SECURITY_CONTEXT"},
+	{STATUS_CLUSTER_NETWORK_NOT_INTERNAL, -EIO,
+	"STATUS_CLUSTER_NETWORK_NOT_INTERNAL"},
+	{STATUS_CLUSTER_POISONED, -EIO, "STATUS_CLUSTER_POISONED"},
+	{STATUS_ACPI_INVALID_OPCODE, -EIO, "STATUS_ACPI_INVALID_OPCODE"},
+	{STATUS_ACPI_STACK_OVERFLOW, -EIO, "STATUS_ACPI_STACK_OVERFLOW"},
+	{STATUS_ACPI_ASSERT_FAILED, -EIO, "STATUS_ACPI_ASSERT_FAILED"},
+	{STATUS_ACPI_INVALID_INDEX, -EIO, "STATUS_ACPI_INVALID_INDEX"},
+	{STATUS_ACPI_INVALID_ARGUMENT, -EIO, "STATUS_ACPI_INVALID_ARGUMENT"},
+	{STATUS_ACPI_FATAL, -EIO, "STATUS_ACPI_FATAL"},
+	{STATUS_ACPI_INVALID_SUPERNAME, -EIO, "STATUS_ACPI_INVALID_SUPERNAME"},
+	{STATUS_ACPI_INVALID_ARGTYPE, -EIO, "STATUS_ACPI_INVALID_ARGTYPE"},
+	{STATUS_ACPI_INVALID_OBJTYPE, -EIO, "STATUS_ACPI_INVALID_OBJTYPE"},
+	{STATUS_ACPI_INVALID_TARGETTYPE, -EIO,
+	"STATUS_ACPI_INVALID_TARGETTYPE"},
+	{STATUS_ACPI_INCORRECT_ARGUMENT_COUNT, -EIO,
+	"STATUS_ACPI_INCORRECT_ARGUMENT_COUNT"},
+	{STATUS_ACPI_ADDRESS_NOT_MAPPED, -EIO,
+	"STATUS_ACPI_ADDRESS_NOT_MAPPED"},
+	{STATUS_ACPI_INVALID_EVENTTYPE, -EIO, "STATUS_ACPI_INVALID_EVENTTYPE"},
+	{STATUS_ACPI_HANDLER_COLLISION, -EIO, "STATUS_ACPI_HANDLER_COLLISION"},
+	{STATUS_ACPI_INVALID_DATA, -EIO, "STATUS_ACPI_INVALID_DATA"},
+	{STATUS_ACPI_INVALID_REGION, -EIO, "STATUS_ACPI_INVALID_REGION"},
+	{STATUS_ACPI_INVALID_ACCESS_SIZE, -EIO,
+	"STATUS_ACPI_INVALID_ACCESS_SIZE"},
+	{STATUS_ACPI_ACQUIRE_GLOBAL_LOCK, -EIO,
+	"STATUS_ACPI_ACQUIRE_GLOBAL_LOCK"},
+	{STATUS_ACPI_ALREADY_INITIALIZED, -EIO,
+	"STATUS_ACPI_ALREADY_INITIALIZED"},
+	{STATUS_ACPI_NOT_INITIALIZED, -EIO, "STATUS_ACPI_NOT_INITIALIZED"},
+	{STATUS_ACPI_INVALID_MUTEX_LEVEL, -EIO,
+	"STATUS_ACPI_INVALID_MUTEX_LEVEL"},
+	{STATUS_ACPI_MUTEX_NOT_OWNED, -EIO, "STATUS_ACPI_MUTEX_NOT_OWNED"},
+	{STATUS_ACPI_MUTEX_NOT_OWNER, -EIO, "STATUS_ACPI_MUTEX_NOT_OWNER"},
+	{STATUS_ACPI_RS_ACCESS, -EIO, "STATUS_ACPI_RS_ACCESS"},
+	{STATUS_ACPI_INVALID_TABLE, -EIO, "STATUS_ACPI_INVALID_TABLE"},
+	{STATUS_ACPI_REG_HANDLER_FAILED, -EIO,
+	"STATUS_ACPI_REG_HANDLER_FAILED"},
+	{STATUS_ACPI_POWER_REQUEST_FAILED, -EIO,
+	"STATUS_ACPI_POWER_REQUEST_FAILED"},
+	{STATUS_SXS_SECTION_NOT_FOUND, -EIO, "STATUS_SXS_SECTION_NOT_FOUND"},
+	{STATUS_SXS_CANT_GEN_ACTCTX, -EIO, "STATUS_SXS_CANT_GEN_ACTCTX"},
+	{STATUS_SXS_INVALID_ACTCTXDATA_FORMAT, -EIO,
+	"STATUS_SXS_INVALID_ACTCTXDATA_FORMAT"},
+	{STATUS_SXS_ASSEMBLY_NOT_FOUND, -EIO, "STATUS_SXS_ASSEMBLY_NOT_FOUND"},
+	{STATUS_SXS_MANIFEST_FORMAT_ERROR, -EIO,
+	"STATUS_SXS_MANIFEST_FORMAT_ERROR"},
+	{STATUS_SXS_MANIFEST_PARSE_ERROR, -EIO,
+	"STATUS_SXS_MANIFEST_PARSE_ERROR"},
+	{STATUS_SXS_ACTIVATION_CONTEXT_DISABLED, -EIO,
+	"STATUS_SXS_ACTIVATION_CONTEXT_DISABLED"},
+	{STATUS_SXS_KEY_NOT_FOUND, -EIO, "STATUS_SXS_KEY_NOT_FOUND"},
+	{STATUS_SXS_VERSION_CONFLICT, -EIO, "STATUS_SXS_VERSION_CONFLICT"},
+	{STATUS_SXS_WRONG_SECTION_TYPE, -EIO, "STATUS_SXS_WRONG_SECTION_TYPE"},
+	{STATUS_SXS_THREAD_QUERIES_DISABLED, -EIO,
+	"STATUS_SXS_THREAD_QUERIES_DISABLED"},
+	{STATUS_SXS_ASSEMBLY_MISSING, -EIO, "STATUS_SXS_ASSEMBLY_MISSING"},
+	{STATUS_SXS_PROCESS_DEFAULT_ALREADY_SET, -EIO,
+	"STATUS_SXS_PROCESS_DEFAULT_ALREADY_SET"},
+	{STATUS_SXS_EARLY_DEACTIVATION, -EIO, "STATUS_SXS_EARLY_DEACTIVATION"},
+	{STATUS_SXS_INVALID_DEACTIVATION, -EIO,
+	"STATUS_SXS_INVALID_DEACTIVATION"},
+	{STATUS_SXS_MULTIPLE_DEACTIVATION, -EIO,
+	"STATUS_SXS_MULTIPLE_DEACTIVATION"},
+	{STATUS_SXS_SYSTEM_DEFAULT_ACTIVATION_CONTEXT_EMPTY, -EIO,
+	"STATUS_SXS_SYSTEM_DEFAULT_ACTIVATION_CONTEXT_EMPTY"},
+	{STATUS_SXS_PROCESS_TERMINATION_REQUESTED, -EIO,
+	"STATUS_SXS_PROCESS_TERMINATION_REQUESTED"},
+	{STATUS_SXS_CORRUPT_ACTIVATION_STACK, -EIO,
+	"STATUS_SXS_CORRUPT_ACTIVATION_STACK"},
+	{STATUS_SXS_CORRUPTION, -EIO, "STATUS_SXS_CORRUPTION"},
+	{STATUS_SXS_INVALID_IDENTITY_ATTRIBUTE_VALUE, -EIO,
+	"STATUS_SXS_INVALID_IDENTITY_ATTRIBUTE_VALUE"},
+	{STATUS_SXS_INVALID_IDENTITY_ATTRIBUTE_NAME, -EIO,
+	"STATUS_SXS_INVALID_IDENTITY_ATTRIBUTE_NAME"},
+	{STATUS_SXS_IDENTITY_DUPLICATE_ATTRIBUTE, -EIO,
+	"STATUS_SXS_IDENTITY_DUPLICATE_ATTRIBUTE"},
+	{STATUS_SXS_IDENTITY_PARSE_ERROR, -EIO,
+	"STATUS_SXS_IDENTITY_PARSE_ERROR"},
+	{STATUS_SXS_COMPONENT_STORE_CORRUPT, -EIO,
+	"STATUS_SXS_COMPONENT_STORE_CORRUPT"},
+	{STATUS_SXS_FILE_HASH_MISMATCH, -EIO, "STATUS_SXS_FILE_HASH_MISMATCH"},
+	{STATUS_SXS_MANIFEST_IDENTITY_SAME_BUT_CONTENTS_DIFFERENT, -EIO,
+	"STATUS_SXS_MANIFEST_IDENTITY_SAME_BUT_CONTENTS_DIFFERENT"},
+	{STATUS_SXS_IDENTITIES_DIFFERENT, -EIO,
+	"STATUS_SXS_IDENTITIES_DIFFERENT"},
+	{STATUS_SXS_ASSEMBLY_IS_NOT_A_DEPLOYMENT, -EIO,
+	"STATUS_SXS_ASSEMBLY_IS_NOT_A_DEPLOYMENT"},
+	{STATUS_SXS_FILE_NOT_PART_OF_ASSEMBLY, -EIO,
+	"STATUS_SXS_FILE_NOT_PART_OF_ASSEMBLY"},
+	{STATUS_ADVANCED_INSTALLER_FAILED, -EIO,
+	"STATUS_ADVANCED_INSTALLER_FAILED"},
+	{STATUS_XML_ENCODING_MISMATCH, -EIO, "STATUS_XML_ENCODING_MISMATCH"},
+	{STATUS_SXS_MANIFEST_TOO_BIG, -EIO, "STATUS_SXS_MANIFEST_TOO_BIG"},
+	{STATUS_SXS_SETTING_NOT_REGISTERED, -EIO,
+	"STATUS_SXS_SETTING_NOT_REGISTERED"},
+	{STATUS_SXS_TRANSACTION_CLOSURE_INCOMPLETE, -EIO,
+	"STATUS_SXS_TRANSACTION_CLOSURE_INCOMPLETE"},
+	{STATUS_SMI_PRIMITIVE_INSTALLER_FAILED, -EIO,
+	"STATUS_SMI_PRIMITIVE_INSTALLER_FAILED"},
+	{STATUS_GENERIC_COMMAND_FAILED, -EIO, "STATUS_GENERIC_COMMAND_FAILED"},
+	{STATUS_SXS_FILE_HASH_MISSING, -EIO, "STATUS_SXS_FILE_HASH_MISSING"},
+	{STATUS_TRANSACTIONAL_CONFLICT, -EIO, "STATUS_TRANSACTIONAL_CONFLICT"},
+	{STATUS_INVALID_TRANSACTION, -EIO, "STATUS_INVALID_TRANSACTION"},
+	{STATUS_TRANSACTION_NOT_ACTIVE, -EIO, "STATUS_TRANSACTION_NOT_ACTIVE"},
+	{STATUS_TM_INITIALIZATION_FAILED, -EIO,
+	"STATUS_TM_INITIALIZATION_FAILED"},
+	{STATUS_RM_NOT_ACTIVE, -EIO, "STATUS_RM_NOT_ACTIVE"},
+	{STATUS_RM_METADATA_CORRUPT, -EIO, "STATUS_RM_METADATA_CORRUPT"},
+	{STATUS_TRANSACTION_NOT_JOINED, -EIO, "STATUS_TRANSACTION_NOT_JOINED"},
+	{STATUS_DIRECTORY_NOT_RM, -EIO, "STATUS_DIRECTORY_NOT_RM"},
+	{STATUS_TRANSACTIONS_UNSUPPORTED_REMOTE, -EIO,
+	"STATUS_TRANSACTIONS_UNSUPPORTED_REMOTE"},
+	{STATUS_LOG_RESIZE_INVALID_SIZE, -EIO,
+	"STATUS_LOG_RESIZE_INVALID_SIZE"},
+	{STATUS_REMOTE_FILE_VERSION_MISMATCH, -EIO,
+	"STATUS_REMOTE_FILE_VERSION_MISMATCH"},
+	{STATUS_CRM_PROTOCOL_ALREADY_EXISTS, -EIO,
+	"STATUS_CRM_PROTOCOL_ALREADY_EXISTS"},
+	{STATUS_TRANSACTION_PROPAGATION_FAILED, -EIO,
+	"STATUS_TRANSACTION_PROPAGATION_FAILED"},
+	{STATUS_CRM_PROTOCOL_NOT_FOUND, -EIO, "STATUS_CRM_PROTOCOL_NOT_FOUND"},
+	{STATUS_TRANSACTION_SUPERIOR_EXISTS, -EIO,
+	"STATUS_TRANSACTION_SUPERIOR_EXISTS"},
+	{STATUS_TRANSACTION_REQUEST_NOT_VALID, -EIO,
+	"STATUS_TRANSACTION_REQUEST_NOT_VALID"},
+	{STATUS_TRANSACTION_NOT_REQUESTED, -EIO,
+	"STATUS_TRANSACTION_NOT_REQUESTED"},
+	{STATUS_TRANSACTION_ALREADY_ABORTED, -EIO,
+	"STATUS_TRANSACTION_ALREADY_ABORTED"},
+	{STATUS_TRANSACTION_ALREADY_COMMITTED, -EIO,
+	"STATUS_TRANSACTION_ALREADY_COMMITTED"},
+	{STATUS_TRANSACTION_INVALID_MARSHALL_BUFFER, -EIO,
+	"STATUS_TRANSACTION_INVALID_MARSHALL_BUFFER"},
+	{STATUS_CURRENT_TRANSACTION_NOT_VALID, -EIO,
+	"STATUS_CURRENT_TRANSACTION_NOT_VALID"},
+	{STATUS_LOG_GROWTH_FAILED, -EIO, "STATUS_LOG_GROWTH_FAILED"},
+	{STATUS_OBJECT_NO_LONGER_EXISTS, -EIO,
+	"STATUS_OBJECT_NO_LONGER_EXISTS"},
+	{STATUS_STREAM_MINIVERSION_NOT_FOUND, -EIO,
+	"STATUS_STREAM_MINIVERSION_NOT_FOUND"},
+	{STATUS_STREAM_MINIVERSION_NOT_VALID, -EIO,
+	"STATUS_STREAM_MINIVERSION_NOT_VALID"},
+	{STATUS_MINIVERSION_INACCESSIBLE_FROM_SPECIFIED_TRANSACTION, -EIO,
+	"STATUS_MINIVERSION_INACCESSIBLE_FROM_SPECIFIED_TRANSACTION"},
+	{STATUS_CANT_OPEN_MINIVERSION_WITH_MODIFY_INTENT, -EIO,
+	"STATUS_CANT_OPEN_MINIVERSION_WITH_MODIFY_INTENT"},
+	{STATUS_CANT_CREATE_MORE_STREAM_MINIVERSIONS, -EIO,
+	"STATUS_CANT_CREATE_MORE_STREAM_MINIVERSIONS"},
+	{STATUS_HANDLE_NO_LONGER_VALID, -EIO, "STATUS_HANDLE_NO_LONGER_VALID"},
+	{STATUS_LOG_CORRUPTION_DETECTED, -EIO,
+	"STATUS_LOG_CORRUPTION_DETECTED"},
+	{STATUS_RM_DISCONNECTED, -EIO, "STATUS_RM_DISCONNECTED"},
+	{STATUS_ENLISTMENT_NOT_SUPERIOR, -EIO,
+	"STATUS_ENLISTMENT_NOT_SUPERIOR"},
+	{STATUS_FILE_IDENTITY_NOT_PERSISTENT, -EIO,
+	"STATUS_FILE_IDENTITY_NOT_PERSISTENT"},
+	{STATUS_CANT_BREAK_TRANSACTIONAL_DEPENDENCY, -EIO,
+	"STATUS_CANT_BREAK_TRANSACTIONAL_DEPENDENCY"},
+	{STATUS_CANT_CROSS_RM_BOUNDARY, -EIO, "STATUS_CANT_CROSS_RM_BOUNDARY"},
+	{STATUS_TXF_DIR_NOT_EMPTY, -EIO, "STATUS_TXF_DIR_NOT_EMPTY"},
+	{STATUS_INDOUBT_TRANSACTIONS_EXIST, -EIO,
+	"STATUS_INDOUBT_TRANSACTIONS_EXIST"},
+	{STATUS_TM_VOLATILE, -EIO, "STATUS_TM_VOLATILE"},
+	{STATUS_ROLLBACK_TIMER_EXPIRED, -EIO, "STATUS_ROLLBACK_TIMER_EXPIRED"},
+	{STATUS_TXF_ATTRIBUTE_CORRUPT, -EIO, "STATUS_TXF_ATTRIBUTE_CORRUPT"},
+	{STATUS_EFS_NOT_ALLOWED_IN_TRANSACTION, -EIO,
+	"STATUS_EFS_NOT_ALLOWED_IN_TRANSACTION"},
+	{STATUS_TRANSACTIONAL_OPEN_NOT_ALLOWED, -EIO,
+	"STATUS_TRANSACTIONAL_OPEN_NOT_ALLOWED"},
+	{STATUS_TRANSACTED_MAPPING_UNSUPPORTED_REMOTE, -EIO,
+	"STATUS_TRANSACTED_MAPPING_UNSUPPORTED_REMOTE"},
+	{STATUS_TRANSACTION_REQUIRED_PROMOTION, -EIO,
+	"STATUS_TRANSACTION_REQUIRED_PROMOTION"},
+	{STATUS_CANNOT_EXECUTE_FILE_IN_TRANSACTION, -EIO,
+	"STATUS_CANNOT_EXECUTE_FILE_IN_TRANSACTION"},
+	{STATUS_TRANSACTIONS_NOT_FROZEN, -EIO,
+	"STATUS_TRANSACTIONS_NOT_FROZEN"},
+	{STATUS_TRANSACTION_FREEZE_IN_PROGRESS, -EIO,
+	"STATUS_TRANSACTION_FREEZE_IN_PROGRESS"},
+	{STATUS_NOT_SNAPSHOT_VOLUME, -EIO, "STATUS_NOT_SNAPSHOT_VOLUME"},
+	{STATUS_NO_SAVEPOINT_WITH_OPEN_FILES, -EIO,
+	"STATUS_NO_SAVEPOINT_WITH_OPEN_FILES"},
+	{STATUS_SPARSE_NOT_ALLOWED_IN_TRANSACTION, -EIO,
+	"STATUS_SPARSE_NOT_ALLOWED_IN_TRANSACTION"},
+	{STATUS_TM_IDENTITY_MISMATCH, -EIO, "STATUS_TM_IDENTITY_MISMATCH"},
+	{STATUS_FLOATED_SECTION, -EIO, "STATUS_FLOATED_SECTION"},
+	{STATUS_CANNOT_ACCEPT_TRANSACTED_WORK, -EIO,
+	"STATUS_CANNOT_ACCEPT_TRANSACTED_WORK"},
+	{STATUS_CANNOT_ABORT_TRANSACTIONS, -EIO,
+	"STATUS_CANNOT_ABORT_TRANSACTIONS"},
+	{STATUS_TRANSACTION_NOT_FOUND, -EIO, "STATUS_TRANSACTION_NOT_FOUND"},
+	{STATUS_RESOURCEMANAGER_NOT_FOUND, -EIO,
+	"STATUS_RESOURCEMANAGER_NOT_FOUND"},
+	{STATUS_ENLISTMENT_NOT_FOUND, -EIO, "STATUS_ENLISTMENT_NOT_FOUND"},
+	{STATUS_TRANSACTIONMANAGER_NOT_FOUND, -EIO,
+	"STATUS_TRANSACTIONMANAGER_NOT_FOUND"},
+	{STATUS_TRANSACTIONMANAGER_NOT_ONLINE, -EIO,
+	"STATUS_TRANSACTIONMANAGER_NOT_ONLINE"},
+	{STATUS_TRANSACTIONMANAGER_RECOVERY_NAME_COLLISION, -EIO,
+	"STATUS_TRANSACTIONMANAGER_RECOVERY_NAME_COLLISION"},
+	{STATUS_TRANSACTION_NOT_ROOT, -EIO, "STATUS_TRANSACTION_NOT_ROOT"},
+	{STATUS_TRANSACTION_OBJECT_EXPIRED, -EIO,
+	"STATUS_TRANSACTION_OBJECT_EXPIRED"},
+	{STATUS_COMPRESSION_NOT_ALLOWED_IN_TRANSACTION, -EIO,
+	"STATUS_COMPRESSION_NOT_ALLOWED_IN_TRANSACTION"},
+	{STATUS_TRANSACTION_RESPONSE_NOT_ENLISTED, -EIO,
+	"STATUS_TRANSACTION_RESPONSE_NOT_ENLISTED"},
+	{STATUS_TRANSACTION_RECORD_TOO_LONG, -EIO,
+	"STATUS_TRANSACTION_RECORD_TOO_LONG"},
+	{STATUS_NO_LINK_TRACKING_IN_TRANSACTION, -EIO,
+	"STATUS_NO_LINK_TRACKING_IN_TRANSACTION"},
+	{STATUS_OPERATION_NOT_SUPPORTED_IN_TRANSACTION, -EOPNOTSUPP,
+	"STATUS_OPERATION_NOT_SUPPORTED_IN_TRANSACTION"},
+	{STATUS_TRANSACTION_INTEGRITY_VIOLATED, -EIO,
+	"STATUS_TRANSACTION_INTEGRITY_VIOLATED"},
+	{STATUS_LOG_SECTOR_INVALID, -EIO, "STATUS_LOG_SECTOR_INVALID"},
+	{STATUS_LOG_SECTOR_PARITY_INVALID, -EIO,
+	"STATUS_LOG_SECTOR_PARITY_INVALID"},
+	{STATUS_LOG_SECTOR_REMAPPED, -EIO, "STATUS_LOG_SECTOR_REMAPPED"},
+	{STATUS_LOG_BLOCK_INCOMPLETE, -EIO, "STATUS_LOG_BLOCK_INCOMPLETE"},
+	{STATUS_LOG_INVALID_RANGE, -EIO, "STATUS_LOG_INVALID_RANGE"},
+	{STATUS_LOG_BLOCKS_EXHAUSTED, -EIO, "STATUS_LOG_BLOCKS_EXHAUSTED"},
+	{STATUS_LOG_READ_CONTEXT_INVALID, -EIO,
+	"STATUS_LOG_READ_CONTEXT_INVALID"},
+	{STATUS_LOG_RESTART_INVALID, -EIO, "STATUS_LOG_RESTART_INVALID"},
+	{STATUS_LOG_BLOCK_VERSION, -EIO, "STATUS_LOG_BLOCK_VERSION"},
+	{STATUS_LOG_BLOCK_INVALID, -EIO, "STATUS_LOG_BLOCK_INVALID"},
+	{STATUS_LOG_READ_MODE_INVALID, -EIO, "STATUS_LOG_READ_MODE_INVALID"},
+	{STATUS_LOG_METADATA_CORRUPT, -EIO, "STATUS_LOG_METADATA_CORRUPT"},
+	{STATUS_LOG_METADATA_INVALID, -EIO, "STATUS_LOG_METADATA_INVALID"},
+	{STATUS_LOG_METADATA_INCONSISTENT, -EIO,
+	"STATUS_LOG_METADATA_INCONSISTENT"},
+	{STATUS_LOG_RESERVATION_INVALID, -EIO,
+	"STATUS_LOG_RESERVATION_INVALID"},
+	{STATUS_LOG_CANT_DELETE, -EIO, "STATUS_LOG_CANT_DELETE"},
+	{STATUS_LOG_CONTAINER_LIMIT_EXCEEDED, -EIO,
+	"STATUS_LOG_CONTAINER_LIMIT_EXCEEDED"},
+	{STATUS_LOG_START_OF_LOG, -EIO, "STATUS_LOG_START_OF_LOG"},
+	{STATUS_LOG_POLICY_ALREADY_INSTALLED, -EIO,
+	"STATUS_LOG_POLICY_ALREADY_INSTALLED"},
+	{STATUS_LOG_POLICY_NOT_INSTALLED, -EIO,
+	"STATUS_LOG_POLICY_NOT_INSTALLED"},
+	{STATUS_LOG_POLICY_INVALID, -EIO, "STATUS_LOG_POLICY_INVALID"},
+	{STATUS_LOG_POLICY_CONFLICT, -EIO, "STATUS_LOG_POLICY_CONFLICT"},
+	{STATUS_LOG_PINNED_ARCHIVE_TAIL, -EIO,
+	"STATUS_LOG_PINNED_ARCHIVE_TAIL"},
+	{STATUS_LOG_RECORD_NONEXISTENT, -EIO, "STATUS_LOG_RECORD_NONEXISTENT"},
+	{STATUS_LOG_RECORDS_RESERVED_INVALID, -EIO,
+	"STATUS_LOG_RECORDS_RESERVED_INVALID"},
+	{STATUS_LOG_SPACE_RESERVED_INVALID, -EIO,
+	"STATUS_LOG_SPACE_RESERVED_INVALID"},
+	{STATUS_LOG_TAIL_INVALID, -EIO, "STATUS_LOG_TAIL_INVALID"},
+	{STATUS_LOG_FULL, -EIO, "STATUS_LOG_FULL"},
+	{STATUS_LOG_MULTIPLEXED, -EIO, "STATUS_LOG_MULTIPLEXED"},
+	{STATUS_LOG_DEDICATED, -EIO, "STATUS_LOG_DEDICATED"},
+	{STATUS_LOG_ARCHIVE_NOT_IN_PROGRESS, -EIO,
+	"STATUS_LOG_ARCHIVE_NOT_IN_PROGRESS"},
+	{STATUS_LOG_ARCHIVE_IN_PROGRESS, -EIO,
+	"STATUS_LOG_ARCHIVE_IN_PROGRESS"},
+	{STATUS_LOG_EPHEMERAL, -EIO, "STATUS_LOG_EPHEMERAL"},
+	{STATUS_LOG_NOT_ENOUGH_CONTAINERS, -EIO,
+	"STATUS_LOG_NOT_ENOUGH_CONTAINERS"},
+	{STATUS_LOG_CLIENT_ALREADY_REGISTERED, -EIO,
+	"STATUS_LOG_CLIENT_ALREADY_REGISTERED"},
+	{STATUS_LOG_CLIENT_NOT_REGISTERED, -EIO,
+	"STATUS_LOG_CLIENT_NOT_REGISTERED"},
+	{STATUS_LOG_FULL_HANDLER_IN_PROGRESS, -EIO,
+	"STATUS_LOG_FULL_HANDLER_IN_PROGRESS"},
+	{STATUS_LOG_CONTAINER_READ_FAILED, -EIO,
+	"STATUS_LOG_CONTAINER_READ_FAILED"},
+	{STATUS_LOG_CONTAINER_WRITE_FAILED, -EIO,
+	"STATUS_LOG_CONTAINER_WRITE_FAILED"},
+	{STATUS_LOG_CONTAINER_OPEN_FAILED, -EIO,
+	"STATUS_LOG_CONTAINER_OPEN_FAILED"},
+	{STATUS_LOG_CONTAINER_STATE_INVALID, -EIO,
+	"STATUS_LOG_CONTAINER_STATE_INVALID"},
+	{STATUS_LOG_STATE_INVALID, -EIO, "STATUS_LOG_STATE_INVALID"},
+	{STATUS_LOG_PINNED, -EIO, "STATUS_LOG_PINNED"},
+	{STATUS_LOG_METADATA_FLUSH_FAILED, -EIO,
+	"STATUS_LOG_METADATA_FLUSH_FAILED"},
+	{STATUS_LOG_INCONSISTENT_SECURITY, -EIO,
+	"STATUS_LOG_INCONSISTENT_SECURITY"},
+	{STATUS_LOG_APPENDED_FLUSH_FAILED, -EIO,
+	"STATUS_LOG_APPENDED_FLUSH_FAILED"},
+	{STATUS_LOG_PINNED_RESERVATION, -EIO, "STATUS_LOG_PINNED_RESERVATION"},
+	{STATUS_VIDEO_HUNG_DISPLAY_DRIVER_THREAD, -EIO,
+	"STATUS_VIDEO_HUNG_DISPLAY_DRIVER_THREAD"},
+	{STATUS_FLT_NO_HANDLER_DEFINED, -EIO, "STATUS_FLT_NO_HANDLER_DEFINED"},
+	{STATUS_FLT_CONTEXT_ALREADY_DEFINED, -EIO,
+	"STATUS_FLT_CONTEXT_ALREADY_DEFINED"},
+	{STATUS_FLT_INVALID_ASYNCHRONOUS_REQUEST, -EIO,
+	"STATUS_FLT_INVALID_ASYNCHRONOUS_REQUEST"},
+	{STATUS_FLT_DISALLOW_FAST_IO, -EIO, "STATUS_FLT_DISALLOW_FAST_IO"},
+	{STATUS_FLT_INVALID_NAME_REQUEST, -EIO,
+	"STATUS_FLT_INVALID_NAME_REQUEST"},
+	{STATUS_FLT_NOT_SAFE_TO_POST_OPERATION, -EIO,
+	"STATUS_FLT_NOT_SAFE_TO_POST_OPERATION"},
+	{STATUS_FLT_NOT_INITIALIZED, -EIO, "STATUS_FLT_NOT_INITIALIZED"},
+	{STATUS_FLT_FILTER_NOT_READY, -EIO, "STATUS_FLT_FILTER_NOT_READY"},
+	{STATUS_FLT_POST_OPERATION_CLEANUP, -EIO,
+	"STATUS_FLT_POST_OPERATION_CLEANUP"},
+	{STATUS_FLT_INTERNAL_ERROR, -EIO, "STATUS_FLT_INTERNAL_ERROR"},
+	{STATUS_FLT_DELETING_OBJECT, -EIO, "STATUS_FLT_DELETING_OBJECT"},
+	{STATUS_FLT_MUST_BE_NONPAGED_POOL, -EIO,
+	"STATUS_FLT_MUST_BE_NONPAGED_POOL"},
+	{STATUS_FLT_DUPLICATE_ENTRY, -EIO, "STATUS_FLT_DUPLICATE_ENTRY"},
+	{STATUS_FLT_CBDQ_DISABLED, -EIO, "STATUS_FLT_CBDQ_DISABLED"},
+	{STATUS_FLT_DO_NOT_ATTACH, -EIO, "STATUS_FLT_DO_NOT_ATTACH"},
+	{STATUS_FLT_DO_NOT_DETACH, -EIO, "STATUS_FLT_DO_NOT_DETACH"},
+	{STATUS_FLT_INSTANCE_ALTITUDE_COLLISION, -EIO,
+	"STATUS_FLT_INSTANCE_ALTITUDE_COLLISION"},
+	{STATUS_FLT_INSTANCE_NAME_COLLISION, -EIO,
+	"STATUS_FLT_INSTANCE_NAME_COLLISION"},
+	{STATUS_FLT_FILTER_NOT_FOUND, -EIO, "STATUS_FLT_FILTER_NOT_FOUND"},
+	{STATUS_FLT_VOLUME_NOT_FOUND, -EIO, "STATUS_FLT_VOLUME_NOT_FOUND"},
+	{STATUS_FLT_INSTANCE_NOT_FOUND, -EIO, "STATUS_FLT_INSTANCE_NOT_FOUND"},
+	{STATUS_FLT_CONTEXT_ALLOCATION_NOT_FOUND, -EIO,
+	"STATUS_FLT_CONTEXT_ALLOCATION_NOT_FOUND"},
+	{STATUS_FLT_INVALID_CONTEXT_REGISTRATION, -EIO,
+	"STATUS_FLT_INVALID_CONTEXT_REGISTRATION"},
+	{STATUS_FLT_NAME_CACHE_MISS, -EIO, "STATUS_FLT_NAME_CACHE_MISS"},
+	{STATUS_FLT_NO_DEVICE_OBJECT, -EIO, "STATUS_FLT_NO_DEVICE_OBJECT"},
+	{STATUS_FLT_VOLUME_ALREADY_MOUNTED, -EIO,
+	"STATUS_FLT_VOLUME_ALREADY_MOUNTED"},
+	{STATUS_FLT_ALREADY_ENLISTED, -EIO, "STATUS_FLT_ALREADY_ENLISTED"},
+	{STATUS_FLT_CONTEXT_ALREADY_LINKED, -EIO,
+	"STATUS_FLT_CONTEXT_ALREADY_LINKED"},
+	{STATUS_FLT_NO_WAITER_FOR_REPLY, -EIO,
+	"STATUS_FLT_NO_WAITER_FOR_REPLY"},
+	{STATUS_MONITOR_NO_DESCRIPTOR, -EIO, "STATUS_MONITOR_NO_DESCRIPTOR"},
+	{STATUS_MONITOR_UNKNOWN_DESCRIPTOR_FORMAT, -EIO,
+	"STATUS_MONITOR_UNKNOWN_DESCRIPTOR_FORMAT"},
+	{STATUS_MONITOR_INVALID_DESCRIPTOR_CHECKSUM, -EIO,
+	"STATUS_MONITOR_INVALID_DESCRIPTOR_CHECKSUM"},
+	{STATUS_MONITOR_INVALID_STANDARD_TIMING_BLOCK, -EIO,
+	"STATUS_MONITOR_INVALID_STANDARD_TIMING_BLOCK"},
+	{STATUS_MONITOR_WMI_DATABLOCK_REGISTRATION_FAILED, -EIO,
+	"STATUS_MONITOR_WMI_DATABLOCK_REGISTRATION_FAILED"},
+	{STATUS_MONITOR_INVALID_SERIAL_NUMBER_MONDSC_BLOCK, -EIO,
+	"STATUS_MONITOR_INVALID_SERIAL_NUMBER_MONDSC_BLOCK"},
+	{STATUS_MONITOR_INVALID_USER_FRIENDLY_MONDSC_BLOCK, -EIO,
+	"STATUS_MONITOR_INVALID_USER_FRIENDLY_MONDSC_BLOCK"},
+	{STATUS_MONITOR_NO_MORE_DESCRIPTOR_DATA, -EIO,
+	"STATUS_MONITOR_NO_MORE_DESCRIPTOR_DATA"},
+	{STATUS_MONITOR_INVALID_DETAILED_TIMING_BLOCK, -EIO,
+	"STATUS_MONITOR_INVALID_DETAILED_TIMING_BLOCK"},
+	{STATUS_GRAPHICS_NOT_EXCLUSIVE_MODE_OWNER, -EIO,
+	"STATUS_GRAPHICS_NOT_EXCLUSIVE_MODE_OWNER"},
+	{STATUS_GRAPHICS_INSUFFICIENT_DMA_BUFFER, -EIO,
+	"STATUS_GRAPHICS_INSUFFICIENT_DMA_BUFFER"},
+	{STATUS_GRAPHICS_INVALID_DISPLAY_ADAPTER, -EIO,
+	"STATUS_GRAPHICS_INVALID_DISPLAY_ADAPTER"},
+	{STATUS_GRAPHICS_ADAPTER_WAS_RESET, -EIO,
+	"STATUS_GRAPHICS_ADAPTER_WAS_RESET"},
+	{STATUS_GRAPHICS_INVALID_DRIVER_MODEL, -EIO,
+	"STATUS_GRAPHICS_INVALID_DRIVER_MODEL"},
+	{STATUS_GRAPHICS_PRESENT_MODE_CHANGED, -EIO,
+	"STATUS_GRAPHICS_PRESENT_MODE_CHANGED"},
+	{STATUS_GRAPHICS_PRESENT_OCCLUDED, -EIO,
+	"STATUS_GRAPHICS_PRESENT_OCCLUDED"},
+	{STATUS_GRAPHICS_PRESENT_DENIED, -EIO,
+	"STATUS_GRAPHICS_PRESENT_DENIED"},
+	{STATUS_GRAPHICS_CANNOTCOLORCONVERT, -EIO,
+	"STATUS_GRAPHICS_CANNOTCOLORCONVERT"},
+	{STATUS_GRAPHICS_NO_VIDEO_MEMORY, -EIO,
+	"STATUS_GRAPHICS_NO_VIDEO_MEMORY"},
+	{STATUS_GRAPHICS_CANT_LOCK_MEMORY, -EIO,
+	"STATUS_GRAPHICS_CANT_LOCK_MEMORY"},
+	{STATUS_GRAPHICS_ALLOCATION_BUSY, -EBUSY,
+	"STATUS_GRAPHICS_ALLOCATION_BUSY"},
+	{STATUS_GRAPHICS_TOO_MANY_REFERENCES, -EIO,
+	"STATUS_GRAPHICS_TOO_MANY_REFERENCES"},
+	{STATUS_GRAPHICS_TRY_AGAIN_LATER, -EIO,
+	"STATUS_GRAPHICS_TRY_AGAIN_LATER"},
+	{STATUS_GRAPHICS_TRY_AGAIN_NOW, -EIO, "STATUS_GRAPHICS_TRY_AGAIN_NOW"},
+	{STATUS_GRAPHICS_ALLOCATION_INVALID, -EIO,
+	"STATUS_GRAPHICS_ALLOCATION_INVALID"},
+	{STATUS_GRAPHICS_UNSWIZZLING_APERTURE_UNAVAILABLE, -EIO,
+	"STATUS_GRAPHICS_UNSWIZZLING_APERTURE_UNAVAILABLE"},
+	{STATUS_GRAPHICS_UNSWIZZLING_APERTURE_UNSUPPORTED, -EIO,
+	"STATUS_GRAPHICS_UNSWIZZLING_APERTURE_UNSUPPORTED"},
+	{STATUS_GRAPHICS_CANT_EVICT_PINNED_ALLOCATION, -EIO,
+	"STATUS_GRAPHICS_CANT_EVICT_PINNED_ALLOCATION"},
+	{STATUS_GRAPHICS_INVALID_ALLOCATION_USAGE, -EIO,
+	"STATUS_GRAPHICS_INVALID_ALLOCATION_USAGE"},
+	{STATUS_GRAPHICS_CANT_RENDER_LOCKED_ALLOCATION, -EIO,
+	"STATUS_GRAPHICS_CANT_RENDER_LOCKED_ALLOCATION"},
+	{STATUS_GRAPHICS_ALLOCATION_CLOSED, -EIO,
+	"STATUS_GRAPHICS_ALLOCATION_CLOSED"},
+	{STATUS_GRAPHICS_INVALID_ALLOCATION_INSTANCE, -EIO,
+	"STATUS_GRAPHICS_INVALID_ALLOCATION_INSTANCE"},
+	{STATUS_GRAPHICS_INVALID_ALLOCATION_HANDLE, -EIO,
+	"STATUS_GRAPHICS_INVALID_ALLOCATION_HANDLE"},
+	{STATUS_GRAPHICS_WRONG_ALLOCATION_DEVICE, -EIO,
+	"STATUS_GRAPHICS_WRONG_ALLOCATION_DEVICE"},
+	{STATUS_GRAPHICS_ALLOCATION_CONTENT_LOST, -EIO,
+	"STATUS_GRAPHICS_ALLOCATION_CONTENT_LOST"},
+	{STATUS_GRAPHICS_GPU_EXCEPTION_ON_DEVICE, -EIO,
+	"STATUS_GRAPHICS_GPU_EXCEPTION_ON_DEVICE"},
+	{STATUS_GRAPHICS_INVALID_VIDPN_TOPOLOGY, -EIO,
+	"STATUS_GRAPHICS_INVALID_VIDPN_TOPOLOGY"},
+	{STATUS_GRAPHICS_VIDPN_TOPOLOGY_NOT_SUPPORTED, -EIO,
+	"STATUS_GRAPHICS_VIDPN_TOPOLOGY_NOT_SUPPORTED"},
+	{STATUS_GRAPHICS_VIDPN_TOPOLOGY_CURRENTLY_NOT_SUPPORTED, -EIO,
+	"STATUS_GRAPHICS_VIDPN_TOPOLOGY_CURRENTLY_NOT_SUPPORTED"},
+	{STATUS_GRAPHICS_INVALID_VIDPN, -EIO, "STATUS_GRAPHICS_INVALID_VIDPN"},
+	{STATUS_GRAPHICS_INVALID_VIDEO_PRESENT_SOURCE, -EIO,
+	"STATUS_GRAPHICS_INVALID_VIDEO_PRESENT_SOURCE"},
+	{STATUS_GRAPHICS_INVALID_VIDEO_PRESENT_TARGET, -EIO,
+	"STATUS_GRAPHICS_INVALID_VIDEO_PRESENT_TARGET"},
+	{STATUS_GRAPHICS_VIDPN_MODALITY_NOT_SUPPORTED, -EIO,
+	"STATUS_GRAPHICS_VIDPN_MODALITY_NOT_SUPPORTED"},
+	{STATUS_GRAPHICS_INVALID_VIDPN_SOURCEMODESET, -EIO,
+	"STATUS_GRAPHICS_INVALID_VIDPN_SOURCEMODESET"},
+	{STATUS_GRAPHICS_INVALID_VIDPN_TARGETMODESET, -EIO,
+	"STATUS_GRAPHICS_INVALID_VIDPN_TARGETMODESET"},
+	{STATUS_GRAPHICS_INVALID_FREQUENCY, -EIO,
+	"STATUS_GRAPHICS_INVALID_FREQUENCY"},
+	{STATUS_GRAPHICS_INVALID_ACTIVE_REGION, -EIO,
+	"STATUS_GRAPHICS_INVALID_ACTIVE_REGION"},
+	{STATUS_GRAPHICS_INVALID_TOTAL_REGION, -EIO,
+	"STATUS_GRAPHICS_INVALID_TOTAL_REGION"},
+	{STATUS_GRAPHICS_INVALID_VIDEO_PRESENT_SOURCE_MODE, -EIO,
+	"STATUS_GRAPHICS_INVALID_VIDEO_PRESENT_SOURCE_MODE"},
+	{STATUS_GRAPHICS_INVALID_VIDEO_PRESENT_TARGET_MODE, -EIO,
+	"STATUS_GRAPHICS_INVALID_VIDEO_PRESENT_TARGET_MODE"},
+	{STATUS_GRAPHICS_PINNED_MODE_MUST_REMAIN_IN_SET, -EIO,
+	"STATUS_GRAPHICS_PINNED_MODE_MUST_REMAIN_IN_SET"},
+	{STATUS_GRAPHICS_PATH_ALREADY_IN_TOPOLOGY, -EIO,
+	"STATUS_GRAPHICS_PATH_ALREADY_IN_TOPOLOGY"},
+	{STATUS_GRAPHICS_MODE_ALREADY_IN_MODESET, -EIO,
+	"STATUS_GRAPHICS_MODE_ALREADY_IN_MODESET"},
+	{STATUS_GRAPHICS_INVALID_VIDEOPRESENTSOURCESET, -EIO,
+	"STATUS_GRAPHICS_INVALID_VIDEOPRESENTSOURCESET"},
+	{STATUS_GRAPHICS_INVALID_VIDEOPRESENTTARGETSET, -EIO,
+	"STATUS_GRAPHICS_INVALID_VIDEOPRESENTTARGETSET"},
+	{STATUS_GRAPHICS_SOURCE_ALREADY_IN_SET, -EIO,
+	"STATUS_GRAPHICS_SOURCE_ALREADY_IN_SET"},
+	{STATUS_GRAPHICS_TARGET_ALREADY_IN_SET, -EIO,
+	"STATUS_GRAPHICS_TARGET_ALREADY_IN_SET"},
+	{STATUS_GRAPHICS_INVALID_VIDPN_PRESENT_PATH, -EIO,
+	"STATUS_GRAPHICS_INVALID_VIDPN_PRESENT_PATH"},
+	{STATUS_GRAPHICS_NO_RECOMMENDED_VIDPN_TOPOLOGY, -EIO,
+	"STATUS_GRAPHICS_NO_RECOMMENDED_VIDPN_TOPOLOGY"},
+	{STATUS_GRAPHICS_INVALID_MONITOR_FREQUENCYRANGESET, -EIO,
+	"STATUS_GRAPHICS_INVALID_MONITOR_FREQUENCYRANGESET"},
+	{STATUS_GRAPHICS_INVALID_MONITOR_FREQUENCYRANGE, -EIO,
+	"STATUS_GRAPHICS_INVALID_MONITOR_FREQUENCYRANGE"},
+	{STATUS_GRAPHICS_FREQUENCYRANGE_NOT_IN_SET, -EIO,
+	"STATUS_GRAPHICS_FREQUENCYRANGE_NOT_IN_SET"},
+	{STATUS_GRAPHICS_FREQUENCYRANGE_ALREADY_IN_SET, -EIO,
+	"STATUS_GRAPHICS_FREQUENCYRANGE_ALREADY_IN_SET"},
+	{STATUS_GRAPHICS_STALE_MODESET, -EIO, "STATUS_GRAPHICS_STALE_MODESET"},
+	{STATUS_GRAPHICS_INVALID_MONITOR_SOURCEMODESET, -EIO,
+	"STATUS_GRAPHICS_INVALID_MONITOR_SOURCEMODESET"},
+	{STATUS_GRAPHICS_INVALID_MONITOR_SOURCE_MODE, -EIO,
+	"STATUS_GRAPHICS_INVALID_MONITOR_SOURCE_MODE"},
+	{STATUS_GRAPHICS_NO_RECOMMENDED_FUNCTIONAL_VIDPN, -EIO,
+	"STATUS_GRAPHICS_NO_RECOMMENDED_FUNCTIONAL_VIDPN"},
+	{STATUS_GRAPHICS_MODE_ID_MUST_BE_UNIQUE, -EIO,
+	"STATUS_GRAPHICS_MODE_ID_MUST_BE_UNIQUE"},
+	{STATUS_GRAPHICS_EMPTY_ADAPTER_MONITOR_MODE_SUPPORT_INTERSECTION, -EIO,
+	"STATUS_GRAPHICS_EMPTY_ADAPTER_MONITOR_MODE_SUPPORT_INTERSECTION"},
+	{STATUS_GRAPHICS_VIDEO_PRESENT_TARGETS_LESS_THAN_SOURCES, -EIO,
+	"STATUS_GRAPHICS_VIDEO_PRESENT_TARGETS_LESS_THAN_SOURCES"},
+	{STATUS_GRAPHICS_PATH_NOT_IN_TOPOLOGY, -EIO,
+	"STATUS_GRAPHICS_PATH_NOT_IN_TOPOLOGY"},
+	{STATUS_GRAPHICS_ADAPTER_MUST_HAVE_AT_LEAST_ONE_SOURCE, -EIO,
+	"STATUS_GRAPHICS_ADAPTER_MUST_HAVE_AT_LEAST_ONE_SOURCE"},
+	{STATUS_GRAPHICS_ADAPTER_MUST_HAVE_AT_LEAST_ONE_TARGET, -EIO,
+	"STATUS_GRAPHICS_ADAPTER_MUST_HAVE_AT_LEAST_ONE_TARGET"},
+	{STATUS_GRAPHICS_INVALID_MONITORDESCRIPTORSET, -EIO,
+	"STATUS_GRAPHICS_INVALID_MONITORDESCRIPTORSET"},
+	{STATUS_GRAPHICS_INVALID_MONITORDESCRIPTOR, -EIO,
+	"STATUS_GRAPHICS_INVALID_MONITORDESCRIPTOR"},
+	{STATUS_GRAPHICS_MONITORDESCRIPTOR_NOT_IN_SET, -EIO,
+	"STATUS_GRAPHICS_MONITORDESCRIPTOR_NOT_IN_SET"},
+	{STATUS_GRAPHICS_MONITORDESCRIPTOR_ALREADY_IN_SET, -EIO,
+	"STATUS_GRAPHICS_MONITORDESCRIPTOR_ALREADY_IN_SET"},
+	{STATUS_GRAPHICS_MONITORDESCRIPTOR_ID_MUST_BE_UNIQUE, -EIO,
+	"STATUS_GRAPHICS_MONITORDESCRIPTOR_ID_MUST_BE_UNIQUE"},
+	{STATUS_GRAPHICS_INVALID_VIDPN_TARGET_SUBSET_TYPE, -EIO,
+	"STATUS_GRAPHICS_INVALID_VIDPN_TARGET_SUBSET_TYPE"},
+	{STATUS_GRAPHICS_RESOURCES_NOT_RELATED, -EIO,
+	"STATUS_GRAPHICS_RESOURCES_NOT_RELATED"},
+	{STATUS_GRAPHICS_SOURCE_ID_MUST_BE_UNIQUE, -EIO,
+	"STATUS_GRAPHICS_SOURCE_ID_MUST_BE_UNIQUE"},
+	{STATUS_GRAPHICS_TARGET_ID_MUST_BE_UNIQUE, -EIO,
+	"STATUS_GRAPHICS_TARGET_ID_MUST_BE_UNIQUE"},
+	{STATUS_GRAPHICS_NO_AVAILABLE_VIDPN_TARGET, -EIO,
+	"STATUS_GRAPHICS_NO_AVAILABLE_VIDPN_TARGET"},
+	{STATUS_GRAPHICS_MONITOR_COULD_NOT_BE_ASSOCIATED_WITH_ADAPTER, -EIO,
+	"STATUS_GRAPHICS_MONITOR_COULD_NOT_BE_ASSOCIATED_WITH_ADAPTER"},
+	{STATUS_GRAPHICS_NO_VIDPNMGR, -EIO, "STATUS_GRAPHICS_NO_VIDPNMGR"},
+	{STATUS_GRAPHICS_NO_ACTIVE_VIDPN, -EIO,
+	"STATUS_GRAPHICS_NO_ACTIVE_VIDPN"},
+	{STATUS_GRAPHICS_STALE_VIDPN_TOPOLOGY, -EIO,
+	"STATUS_GRAPHICS_STALE_VIDPN_TOPOLOGY"},
+	{STATUS_GRAPHICS_MONITOR_NOT_CONNECTED, -EIO,
+	"STATUS_GRAPHICS_MONITOR_NOT_CONNECTED"},
+	{STATUS_GRAPHICS_SOURCE_NOT_IN_TOPOLOGY, -EIO,
+	"STATUS_GRAPHICS_SOURCE_NOT_IN_TOPOLOGY"},
+	{STATUS_GRAPHICS_INVALID_PRIMARYSURFACE_SIZE, -EIO,
+	"STATUS_GRAPHICS_INVALID_PRIMARYSURFACE_SIZE"},
+	{STATUS_GRAPHICS_INVALID_VISIBLEREGION_SIZE, -EIO,
+	"STATUS_GRAPHICS_INVALID_VISIBLEREGION_SIZE"},
+	{STATUS_GRAPHICS_INVALID_STRIDE, -EIO,
+	"STATUS_GRAPHICS_INVALID_STRIDE"},
+	{STATUS_GRAPHICS_INVALID_PIXELFORMAT, -EIO,
+	"STATUS_GRAPHICS_INVALID_PIXELFORMAT"},
+	{STATUS_GRAPHICS_INVALID_COLORBASIS, -EIO,
+	"STATUS_GRAPHICS_INVALID_COLORBASIS"},
+	{STATUS_GRAPHICS_INVALID_PIXELVALUEACCESSMODE, -EIO,
+	"STATUS_GRAPHICS_INVALID_PIXELVALUEACCESSMODE"},
+	{STATUS_GRAPHICS_TARGET_NOT_IN_TOPOLOGY, -EIO,
+	"STATUS_GRAPHICS_TARGET_NOT_IN_TOPOLOGY"},
+	{STATUS_GRAPHICS_NO_DISPLAY_MODE_MANAGEMENT_SUPPORT, -EIO,
+	"STATUS_GRAPHICS_NO_DISPLAY_MODE_MANAGEMENT_SUPPORT"},
+	{STATUS_GRAPHICS_VIDPN_SOURCE_IN_USE, -EIO,
+	"STATUS_GRAPHICS_VIDPN_SOURCE_IN_USE"},
+	{STATUS_GRAPHICS_CANT_ACCESS_ACTIVE_VIDPN, -EIO,
+	"STATUS_GRAPHICS_CANT_ACCESS_ACTIVE_VIDPN"},
+	{STATUS_GRAPHICS_INVALID_PATH_IMPORTANCE_ORDINAL, -EIO,
+	"STATUS_GRAPHICS_INVALID_PATH_IMPORTANCE_ORDINAL"},
+	{STATUS_GRAPHICS_INVALID_PATH_CONTENT_GEOMETRY_TRANSFORMATION, -EIO,
+	"STATUS_GRAPHICS_INVALID_PATH_CONTENT_GEOMETRY_TRANSFORMATION"},
+	{STATUS_GRAPHICS_PATH_CONTENT_GEOMETRY_TRANSFORMATION_NOT_SUPPORTED,
+	-EIO,
+	"STATUS_GRAPHICS_PATH_CONTENT_GEOMETRY_TRANSFORMATION_NOT_SUPPORTED"},
+	{STATUS_GRAPHICS_INVALID_GAMMA_RAMP, -EIO,
+	"STATUS_GRAPHICS_INVALID_GAMMA_RAMP"},
+	{STATUS_GRAPHICS_GAMMA_RAMP_NOT_SUPPORTED, -EIO,
+	"STATUS_GRAPHICS_GAMMA_RAMP_NOT_SUPPORTED"},
+	{STATUS_GRAPHICS_MULTISAMPLING_NOT_SUPPORTED, -EIO,
+	"STATUS_GRAPHICS_MULTISAMPLING_NOT_SUPPORTED"},
+	{STATUS_GRAPHICS_MODE_NOT_IN_MODESET, -EIO,
+	"STATUS_GRAPHICS_MODE_NOT_IN_MODESET"},
+	{STATUS_GRAPHICS_INVALID_VIDPN_TOPOLOGY_RECOMMENDATION_REASON, -EIO,
+	"STATUS_GRAPHICS_INVALID_VIDPN_TOPOLOGY_RECOMMENDATION_REASON"},
+	{STATUS_GRAPHICS_INVALID_PATH_CONTENT_TYPE, -EIO,
+	"STATUS_GRAPHICS_INVALID_PATH_CONTENT_TYPE"},
+	{STATUS_GRAPHICS_INVALID_COPYPROTECTION_TYPE, -EIO,
+	"STATUS_GRAPHICS_INVALID_COPYPROTECTION_TYPE"},
+	{STATUS_GRAPHICS_UNASSIGNED_MODESET_ALREADY_EXISTS, -EIO,
+	"STATUS_GRAPHICS_UNASSIGNED_MODESET_ALREADY_EXISTS"},
+	{STATUS_GRAPHICS_INVALID_SCANLINE_ORDERING, -EIO,
+	"STATUS_GRAPHICS_INVALID_SCANLINE_ORDERING"},
+	{STATUS_GRAPHICS_TOPOLOGY_CHANGES_NOT_ALLOWED, -EIO,
+	"STATUS_GRAPHICS_TOPOLOGY_CHANGES_NOT_ALLOWED"},
+	{STATUS_GRAPHICS_NO_AVAILABLE_IMPORTANCE_ORDINALS, -EIO,
+	"STATUS_GRAPHICS_NO_AVAILABLE_IMPORTANCE_ORDINALS"},
+	{STATUS_GRAPHICS_INCOMPATIBLE_PRIVATE_FORMAT, -EIO,
+	"STATUS_GRAPHICS_INCOMPATIBLE_PRIVATE_FORMAT"},
+	{STATUS_GRAPHICS_INVALID_MODE_PRUNING_ALGORITHM, -EIO,
+	"STATUS_GRAPHICS_INVALID_MODE_PRUNING_ALGORITHM"},
+	{STATUS_GRAPHICS_INVALID_MONITOR_CAPABILITY_ORIGIN, -EIO,
+	"STATUS_GRAPHICS_INVALID_MONITOR_CAPABILITY_ORIGIN"},
+	{STATUS_GRAPHICS_INVALID_MONITOR_FREQUENCYRANGE_CONSTRAINT, -EIO,
+	"STATUS_GRAPHICS_INVALID_MONITOR_FREQUENCYRANGE_CONSTRAINT"},
+	{STATUS_GRAPHICS_MAX_NUM_PATHS_REACHED, -EIO,
+	"STATUS_GRAPHICS_MAX_NUM_PATHS_REACHED"},
+	{STATUS_GRAPHICS_CANCEL_VIDPN_TOPOLOGY_AUGMENTATION, -EIO,
+	"STATUS_GRAPHICS_CANCEL_VIDPN_TOPOLOGY_AUGMENTATION"},
+	{STATUS_GRAPHICS_INVALID_CLIENT_TYPE, -EIO,
+	"STATUS_GRAPHICS_INVALID_CLIENT_TYPE"},
+	{STATUS_GRAPHICS_CLIENTVIDPN_NOT_SET, -EIO,
+	"STATUS_GRAPHICS_CLIENTVIDPN_NOT_SET"},
+	{STATUS_GRAPHICS_SPECIFIED_CHILD_ALREADY_CONNECTED, -EIO,
+	"STATUS_GRAPHICS_SPECIFIED_CHILD_ALREADY_CONNECTED"},
+	{STATUS_GRAPHICS_CHILD_DESCRIPTOR_NOT_SUPPORTED, -EIO,
+	"STATUS_GRAPHICS_CHILD_DESCRIPTOR_NOT_SUPPORTED"},
+	{STATUS_GRAPHICS_NOT_A_LINKED_ADAPTER, -EIO,
+	"STATUS_GRAPHICS_NOT_A_LINKED_ADAPTER"},
+	{STATUS_GRAPHICS_LEADLINK_NOT_ENUMERATED, -EIO,
+	"STATUS_GRAPHICS_LEADLINK_NOT_ENUMERATED"},
+	{STATUS_GRAPHICS_CHAINLINKS_NOT_ENUMERATED, -EIO,
+	"STATUS_GRAPHICS_CHAINLINKS_NOT_ENUMERATED"},
+	{STATUS_GRAPHICS_ADAPTER_CHAIN_NOT_READY, -EIO,
+	"STATUS_GRAPHICS_ADAPTER_CHAIN_NOT_READY"},
+	{STATUS_GRAPHICS_CHAINLINKS_NOT_STARTED, -EIO,
+	"STATUS_GRAPHICS_CHAINLINKS_NOT_STARTED"},
+	{STATUS_GRAPHICS_CHAINLINKS_NOT_POWERED_ON, -EIO,
+	"STATUS_GRAPHICS_CHAINLINKS_NOT_POWERED_ON"},
+	{STATUS_GRAPHICS_INCONSISTENT_DEVICE_LINK_STATE, -EIO,
+	"STATUS_GRAPHICS_INCONSISTENT_DEVICE_LINK_STATE"},
+	{STATUS_GRAPHICS_NOT_POST_DEVICE_DRIVER, -EIO,
+	"STATUS_GRAPHICS_NOT_POST_DEVICE_DRIVER"},
+	{STATUS_GRAPHICS_ADAPTER_ACCESS_NOT_EXCLUDED, -EIO,
+	"STATUS_GRAPHICS_ADAPTER_ACCESS_NOT_EXCLUDED"},
+	{STATUS_GRAPHICS_OPM_PROTECTED_OUTPUT_DOES_NOT_HAVE_COPP_SEMANTICS,
+	-EIO,
+	"STATUS_GRAPHICS_OPM_PROTECTED_OUTPUT_DOES_NOT_HAVE_COPP_SEMANTICS"},
+	{STATUS_GRAPHICS_OPM_INVALID_INFORMATION_REQUEST, -EIO,
+	"STATUS_GRAPHICS_OPM_INVALID_INFORMATION_REQUEST"},
+	{STATUS_GRAPHICS_OPM_DRIVER_INTERNAL_ERROR, -EIO,
+	"STATUS_GRAPHICS_OPM_DRIVER_INTERNAL_ERROR"},
+	{STATUS_GRAPHICS_OPM_PROTECTED_OUTPUT_DOES_NOT_HAVE_OPM_SEMANTICS, -EIO,
+	"STATUS_GRAPHICS_OPM_PROTECTED_OUTPUT_DOES_NOT_HAVE_OPM_SEMANTICS"},
+	{STATUS_GRAPHICS_OPM_SIGNALING_NOT_SUPPORTED, -EIO,
+	"STATUS_GRAPHICS_OPM_SIGNALING_NOT_SUPPORTED"},
+	{STATUS_GRAPHICS_OPM_INVALID_CONFIGURATION_REQUEST, -EIO,
+	"STATUS_GRAPHICS_OPM_INVALID_CONFIGURATION_REQUEST"},
+	{STATUS_GRAPHICS_OPM_NOT_SUPPORTED, -EIO,
+	"STATUS_GRAPHICS_OPM_NOT_SUPPORTED"},
+	{STATUS_GRAPHICS_COPP_NOT_SUPPORTED, -EIO,
+	"STATUS_GRAPHICS_COPP_NOT_SUPPORTED"},
+	{STATUS_GRAPHICS_UAB_NOT_SUPPORTED, -EIO,
+	"STATUS_GRAPHICS_UAB_NOT_SUPPORTED"},
+	{STATUS_GRAPHICS_OPM_INVALID_ENCRYPTED_PARAMETERS, -EIO,
+	"STATUS_GRAPHICS_OPM_INVALID_ENCRYPTED_PARAMETERS"},
+	{STATUS_GRAPHICS_OPM_PARAMETER_ARRAY_TOO_SMALL, -EIO,
+	"STATUS_GRAPHICS_OPM_PARAMETER_ARRAY_TOO_SMALL"},
+	{STATUS_GRAPHICS_OPM_NO_PROTECTED_OUTPUTS_EXIST, -EIO,
+	"STATUS_GRAPHICS_OPM_NO_PROTECTED_OUTPUTS_EXIST"},
+	{STATUS_GRAPHICS_PVP_NO_DISPLAY_DEVICE_CORRESPONDS_TO_NAME, -EIO,
+	"STATUS_GRAPHICS_PVP_NO_DISPLAY_DEVICE_CORRESPONDS_TO_NAME"},
+	{STATUS_GRAPHICS_PVP_DISPLAY_DEVICE_NOT_ATTACHED_TO_DESKTOP, -EIO,
+	"STATUS_GRAPHICS_PVP_DISPLAY_DEVICE_NOT_ATTACHED_TO_DESKTOP"},
+	{STATUS_GRAPHICS_PVP_MIRRORING_DEVICES_NOT_SUPPORTED, -EIO,
+	"STATUS_GRAPHICS_PVP_MIRRORING_DEVICES_NOT_SUPPORTED"},
+	{STATUS_GRAPHICS_OPM_INVALID_POINTER, -EIO,
+	"STATUS_GRAPHICS_OPM_INVALID_POINTER"},
+	{STATUS_GRAPHICS_OPM_INTERNAL_ERROR, -EIO,
+	"STATUS_GRAPHICS_OPM_INTERNAL_ERROR"},
+	{STATUS_GRAPHICS_OPM_INVALID_HANDLE, -EIO,
+	"STATUS_GRAPHICS_OPM_INVALID_HANDLE"},
+	{STATUS_GRAPHICS_PVP_NO_MONITORS_CORRESPOND_TO_DISPLAY_DEVICE, -EIO,
+	"STATUS_GRAPHICS_PVP_NO_MONITORS_CORRESPOND_TO_DISPLAY_DEVICE"},
+	{STATUS_GRAPHICS_PVP_INVALID_CERTIFICATE_LENGTH, -EIO,
+	"STATUS_GRAPHICS_PVP_INVALID_CERTIFICATE_LENGTH"},
+	{STATUS_GRAPHICS_OPM_SPANNING_MODE_ENABLED, -EIO,
+	"STATUS_GRAPHICS_OPM_SPANNING_MODE_ENABLED"},
+	{STATUS_GRAPHICS_OPM_THEATER_MODE_ENABLED, -EIO,
+	"STATUS_GRAPHICS_OPM_THEATER_MODE_ENABLED"},
+	{STATUS_GRAPHICS_PVP_HFS_FAILED, -EIO,
+	"STATUS_GRAPHICS_PVP_HFS_FAILED"},
+	{STATUS_GRAPHICS_OPM_INVALID_SRM, -EIO,
+	"STATUS_GRAPHICS_OPM_INVALID_SRM"},
+	{STATUS_GRAPHICS_OPM_OUTPUT_DOES_NOT_SUPPORT_HDCP, -EIO,
+	"STATUS_GRAPHICS_OPM_OUTPUT_DOES_NOT_SUPPORT_HDCP"},
+	{STATUS_GRAPHICS_OPM_OUTPUT_DOES_NOT_SUPPORT_ACP, -EIO,
+	"STATUS_GRAPHICS_OPM_OUTPUT_DOES_NOT_SUPPORT_ACP"},
+	{STATUS_GRAPHICS_OPM_OUTPUT_DOES_NOT_SUPPORT_CGMSA, -EIO,
+	"STATUS_GRAPHICS_OPM_OUTPUT_DOES_NOT_SUPPORT_CGMSA"},
+	{STATUS_GRAPHICS_OPM_HDCP_SRM_NEVER_SET, -EIO,
+	"STATUS_GRAPHICS_OPM_HDCP_SRM_NEVER_SET"},
+	{STATUS_GRAPHICS_OPM_RESOLUTION_TOO_HIGH, -EIO,
+	"STATUS_GRAPHICS_OPM_RESOLUTION_TOO_HIGH"},
+	{STATUS_GRAPHICS_OPM_ALL_HDCP_HARDWARE_ALREADY_IN_USE, -EIO,
+	"STATUS_GRAPHICS_OPM_ALL_HDCP_HARDWARE_ALREADY_IN_USE"},
+	{STATUS_GRAPHICS_OPM_PROTECTED_OUTPUT_NO_LONGER_EXISTS, -EIO,
+	"STATUS_GRAPHICS_OPM_PROTECTED_OUTPUT_NO_LONGER_EXISTS"},
+	{STATUS_GRAPHICS_OPM_SESSION_TYPE_CHANGE_IN_PROGRESS, -EIO,
+	"STATUS_GRAPHICS_OPM_SESSION_TYPE_CHANGE_IN_PROGRESS"},
+	{STATUS_GRAPHICS_I2C_NOT_SUPPORTED, -EIO,
+	"STATUS_GRAPHICS_I2C_NOT_SUPPORTED"},
+	{STATUS_GRAPHICS_I2C_DEVICE_DOES_NOT_EXIST, -EIO,
+	"STATUS_GRAPHICS_I2C_DEVICE_DOES_NOT_EXIST"},
+	{STATUS_GRAPHICS_I2C_ERROR_TRANSMITTING_DATA, -EIO,
+	"STATUS_GRAPHICS_I2C_ERROR_TRANSMITTING_DATA"},
+	{STATUS_GRAPHICS_I2C_ERROR_RECEIVING_DATA, -EIO,
+	"STATUS_GRAPHICS_I2C_ERROR_RECEIVING_DATA"},
+	{STATUS_GRAPHICS_DDCCI_VCP_NOT_SUPPORTED, -EIO,
+	"STATUS_GRAPHICS_DDCCI_VCP_NOT_SUPPORTED"},
+	{STATUS_GRAPHICS_DDCCI_INVALID_DATA, -EIO,
+	"STATUS_GRAPHICS_DDCCI_INVALID_DATA"},
+	{STATUS_GRAPHICS_DDCCI_MONITOR_RETURNED_INVALID_TIMING_STATUS_BYTE,
+	-EIO,
+	"STATUS_GRAPHICS_DDCCI_MONITOR_RETURNED_INVALID_TIMING_STATUS_BYTE"},
+	{STATUS_GRAPHICS_DDCCI_INVALID_CAPABILITIES_STRING, -EIO,
+	"STATUS_GRAPHICS_DDCCI_INVALID_CAPABILITIES_STRING"},
+	{STATUS_GRAPHICS_MCA_INTERNAL_ERROR, -EIO,
+	"STATUS_GRAPHICS_MCA_INTERNAL_ERROR"},
+	{STATUS_GRAPHICS_DDCCI_INVALID_MESSAGE_COMMAND, -EIO,
+	"STATUS_GRAPHICS_DDCCI_INVALID_MESSAGE_COMMAND"},
+	{STATUS_GRAPHICS_DDCCI_INVALID_MESSAGE_LENGTH, -EIO,
+	"STATUS_GRAPHICS_DDCCI_INVALID_MESSAGE_LENGTH"},
+	{STATUS_GRAPHICS_DDCCI_INVALID_MESSAGE_CHECKSUM, -EIO,
+	"STATUS_GRAPHICS_DDCCI_INVALID_MESSAGE_CHECKSUM"},
+	{STATUS_GRAPHICS_INVALID_PHYSICAL_MONITOR_HANDLE, -EIO,
+	"STATUS_GRAPHICS_INVALID_PHYSICAL_MONITOR_HANDLE"},
+	{STATUS_GRAPHICS_MONITOR_NO_LONGER_EXISTS, -EIO,
+	"STATUS_GRAPHICS_MONITOR_NO_LONGER_EXISTS"},
+	{STATUS_GRAPHICS_ONLY_CONSOLE_SESSION_SUPPORTED, -EIO,
+	"STATUS_GRAPHICS_ONLY_CONSOLE_SESSION_SUPPORTED"},
+	{STATUS_GRAPHICS_NO_DISPLAY_DEVICE_CORRESPONDS_TO_NAME, -EIO,
+	"STATUS_GRAPHICS_NO_DISPLAY_DEVICE_CORRESPONDS_TO_NAME"},
+	{STATUS_GRAPHICS_DISPLAY_DEVICE_NOT_ATTACHED_TO_DESKTOP, -EIO,
+	"STATUS_GRAPHICS_DISPLAY_DEVICE_NOT_ATTACHED_TO_DESKTOP"},
+	{STATUS_GRAPHICS_MIRRORING_DEVICES_NOT_SUPPORTED, -EIO,
+	"STATUS_GRAPHICS_MIRRORING_DEVICES_NOT_SUPPORTED"},
+	{STATUS_GRAPHICS_INVALID_POINTER, -EIO,
+	"STATUS_GRAPHICS_INVALID_POINTER"},
+	{STATUS_GRAPHICS_NO_MONITORS_CORRESPOND_TO_DISPLAY_DEVICE, -EIO,
+	"STATUS_GRAPHICS_NO_MONITORS_CORRESPOND_TO_DISPLAY_DEVICE"},
+	{STATUS_GRAPHICS_PARAMETER_ARRAY_TOO_SMALL, -EIO,
+	"STATUS_GRAPHICS_PARAMETER_ARRAY_TOO_SMALL"},
+	{STATUS_GRAPHICS_INTERNAL_ERROR, -EIO,
+	"STATUS_GRAPHICS_INTERNAL_ERROR"},
+	{STATUS_GRAPHICS_SESSION_TYPE_CHANGE_IN_PROGRESS, -EIO,
+	"STATUS_GRAPHICS_SESSION_TYPE_CHANGE_IN_PROGRESS"},
+	{STATUS_FVE_LOCKED_VOLUME, -EIO, "STATUS_FVE_LOCKED_VOLUME"},
+	{STATUS_FVE_NOT_ENCRYPTED, -EIO, "STATUS_FVE_NOT_ENCRYPTED"},
+	{STATUS_FVE_BAD_INFORMATION, -EIO, "STATUS_FVE_BAD_INFORMATION"},
+	{STATUS_FVE_TOO_SMALL, -EIO, "STATUS_FVE_TOO_SMALL"},
+	{STATUS_FVE_FAILED_WRONG_FS, -EIO, "STATUS_FVE_FAILED_WRONG_FS"},
+	{STATUS_FVE_FAILED_BAD_FS, -EIO, "STATUS_FVE_FAILED_BAD_FS"},
+	{STATUS_FVE_FS_NOT_EXTENDED, -EIO, "STATUS_FVE_FS_NOT_EXTENDED"},
+	{STATUS_FVE_FS_MOUNTED, -EIO, "STATUS_FVE_FS_MOUNTED"},
+	{STATUS_FVE_NO_LICENSE, -EIO, "STATUS_FVE_NO_LICENSE"},
+	{STATUS_FVE_ACTION_NOT_ALLOWED, -EIO, "STATUS_FVE_ACTION_NOT_ALLOWED"},
+	{STATUS_FVE_BAD_DATA, -EIO, "STATUS_FVE_BAD_DATA"},
+	{STATUS_FVE_VOLUME_NOT_BOUND, -EIO, "STATUS_FVE_VOLUME_NOT_BOUND"},
+	{STATUS_FVE_NOT_DATA_VOLUME, -EIO, "STATUS_FVE_NOT_DATA_VOLUME"},
+	{STATUS_FVE_CONV_READ_ERROR, -EIO, "STATUS_FVE_CONV_READ_ERROR"},
+	{STATUS_FVE_CONV_WRITE_ERROR, -EIO, "STATUS_FVE_CONV_WRITE_ERROR"},
+	{STATUS_FVE_OVERLAPPED_UPDATE, -EIO, "STATUS_FVE_OVERLAPPED_UPDATE"},
+	{STATUS_FVE_FAILED_SECTOR_SIZE, -EIO, "STATUS_FVE_FAILED_SECTOR_SIZE"},
+	{STATUS_FVE_FAILED_AUTHENTICATION, -EIO,
+	"STATUS_FVE_FAILED_AUTHENTICATION"},
+	{STATUS_FVE_NOT_OS_VOLUME, -EIO, "STATUS_FVE_NOT_OS_VOLUME"},
+	{STATUS_FVE_KEYFILE_NOT_FOUND, -EIO, "STATUS_FVE_KEYFILE_NOT_FOUND"},
+	{STATUS_FVE_KEYFILE_INVALID, -EIO, "STATUS_FVE_KEYFILE_INVALID"},
+	{STATUS_FVE_KEYFILE_NO_VMK, -EIO, "STATUS_FVE_KEYFILE_NO_VMK"},
+	{STATUS_FVE_TPM_DISABLED, -EIO, "STATUS_FVE_TPM_DISABLED"},
+	{STATUS_FVE_TPM_SRK_AUTH_NOT_ZERO, -EIO,
+	"STATUS_FVE_TPM_SRK_AUTH_NOT_ZERO"},
+	{STATUS_FVE_TPM_INVALID_PCR, -EIO, "STATUS_FVE_TPM_INVALID_PCR"},
+	{STATUS_FVE_TPM_NO_VMK, -EIO, "STATUS_FVE_TPM_NO_VMK"},
+	{STATUS_FVE_PIN_INVALID, -EIO, "STATUS_FVE_PIN_INVALID"},
+	{STATUS_FVE_AUTH_INVALID_APPLICATION, -EIO,
+	"STATUS_FVE_AUTH_INVALID_APPLICATION"},
+	{STATUS_FVE_AUTH_INVALID_CONFIG, -EIO,
+	"STATUS_FVE_AUTH_INVALID_CONFIG"},
+	{STATUS_FVE_DEBUGGER_ENABLED, -EIO, "STATUS_FVE_DEBUGGER_ENABLED"},
+	{STATUS_FVE_DRY_RUN_FAILED, -EIO, "STATUS_FVE_DRY_RUN_FAILED"},
+	{STATUS_FVE_BAD_METADATA_POINTER, -EIO,
+	"STATUS_FVE_BAD_METADATA_POINTER"},
+	{STATUS_FVE_OLD_METADATA_COPY, -EIO, "STATUS_FVE_OLD_METADATA_COPY"},
+	{STATUS_FVE_REBOOT_REQUIRED, -EIO, "STATUS_FVE_REBOOT_REQUIRED"},
+	{STATUS_FVE_RAW_ACCESS, -EIO, "STATUS_FVE_RAW_ACCESS"},
+	{STATUS_FVE_RAW_BLOCKED, -EIO, "STATUS_FVE_RAW_BLOCKED"},
+	{STATUS_FWP_CALLOUT_NOT_FOUND, -EIO, "STATUS_FWP_CALLOUT_NOT_FOUND"},
+	{STATUS_FWP_CONDITION_NOT_FOUND, -EIO,
+	"STATUS_FWP_CONDITION_NOT_FOUND"},
+	{STATUS_FWP_FILTER_NOT_FOUND, -EIO, "STATUS_FWP_FILTER_NOT_FOUND"},
+	{STATUS_FWP_LAYER_NOT_FOUND, -EIO, "STATUS_FWP_LAYER_NOT_FOUND"},
+	{STATUS_FWP_PROVIDER_NOT_FOUND, -EIO, "STATUS_FWP_PROVIDER_NOT_FOUND"},
+	{STATUS_FWP_PROVIDER_CONTEXT_NOT_FOUND, -EIO,
+	"STATUS_FWP_PROVIDER_CONTEXT_NOT_FOUND"},
+	{STATUS_FWP_SUBLAYER_NOT_FOUND, -EIO, "STATUS_FWP_SUBLAYER_NOT_FOUND"},
+	{STATUS_FWP_NOT_FOUND, -EIO, "STATUS_FWP_NOT_FOUND"},
+	{STATUS_FWP_ALREADY_EXISTS, -EIO, "STATUS_FWP_ALREADY_EXISTS"},
+	{STATUS_FWP_IN_USE, -EIO, "STATUS_FWP_IN_USE"},
+	{STATUS_FWP_DYNAMIC_SESSION_IN_PROGRESS, -EIO,
+	"STATUS_FWP_DYNAMIC_SESSION_IN_PROGRESS"},
+	{STATUS_FWP_WRONG_SESSION, -EIO, "STATUS_FWP_WRONG_SESSION"},
+	{STATUS_FWP_NO_TXN_IN_PROGRESS, -EIO, "STATUS_FWP_NO_TXN_IN_PROGRESS"},
+	{STATUS_FWP_TXN_IN_PROGRESS, -EIO, "STATUS_FWP_TXN_IN_PROGRESS"},
+	{STATUS_FWP_TXN_ABORTED, -EIO, "STATUS_FWP_TXN_ABORTED"},
+	{STATUS_FWP_SESSION_ABORTED, -EIO, "STATUS_FWP_SESSION_ABORTED"},
+	{STATUS_FWP_INCOMPATIBLE_TXN, -EIO, "STATUS_FWP_INCOMPATIBLE_TXN"},
+	{STATUS_FWP_TIMEOUT, -ETIMEDOUT, "STATUS_FWP_TIMEOUT"},
+	{STATUS_FWP_NET_EVENTS_DISABLED, -EIO,
+	"STATUS_FWP_NET_EVENTS_DISABLED"},
+	{STATUS_FWP_INCOMPATIBLE_LAYER, -EIO, "STATUS_FWP_INCOMPATIBLE_LAYER"},
+	{STATUS_FWP_KM_CLIENTS_ONLY, -EIO, "STATUS_FWP_KM_CLIENTS_ONLY"},
+	{STATUS_FWP_LIFETIME_MISMATCH, -EIO, "STATUS_FWP_LIFETIME_MISMATCH"},
+	{STATUS_FWP_BUILTIN_OBJECT, -EIO, "STATUS_FWP_BUILTIN_OBJECT"},
+	{STATUS_FWP_TOO_MANY_BOOTTIME_FILTERS, -EIO,
+	"STATUS_FWP_TOO_MANY_BOOTTIME_FILTERS"},
+	{STATUS_FWP_TOO_MANY_CALLOUTS, -EIO, "STATUS_FWP_TOO_MANY_CALLOUTS"},
+	{STATUS_FWP_NOTIFICATION_DROPPED, -EIO,
+	"STATUS_FWP_NOTIFICATION_DROPPED"},
+	{STATUS_FWP_TRAFFIC_MISMATCH, -EIO, "STATUS_FWP_TRAFFIC_MISMATCH"},
+	{STATUS_FWP_INCOMPATIBLE_SA_STATE, -EIO,
+	"STATUS_FWP_INCOMPATIBLE_SA_STATE"},
+	{STATUS_FWP_NULL_POINTER, -EIO, "STATUS_FWP_NULL_POINTER"},
+	{STATUS_FWP_INVALID_ENUMERATOR, -EIO, "STATUS_FWP_INVALID_ENUMERATOR"},
+	{STATUS_FWP_INVALID_FLAGS, -EIO, "STATUS_FWP_INVALID_FLAGS"},
+	{STATUS_FWP_INVALID_NET_MASK, -EIO, "STATUS_FWP_INVALID_NET_MASK"},
+	{STATUS_FWP_INVALID_RANGE, -EIO, "STATUS_FWP_INVALID_RANGE"},
+	{STATUS_FWP_INVALID_INTERVAL, -EIO, "STATUS_FWP_INVALID_INTERVAL"},
+	{STATUS_FWP_ZERO_LENGTH_ARRAY, -EIO, "STATUS_FWP_ZERO_LENGTH_ARRAY"},
+	{STATUS_FWP_NULL_DISPLAY_NAME, -EIO, "STATUS_FWP_NULL_DISPLAY_NAME"},
+	{STATUS_FWP_INVALID_ACTION_TYPE, -EIO,
+	"STATUS_FWP_INVALID_ACTION_TYPE"},
+	{STATUS_FWP_INVALID_WEIGHT, -EIO, "STATUS_FWP_INVALID_WEIGHT"},
+	{STATUS_FWP_MATCH_TYPE_MISMATCH, -EIO,
+	"STATUS_FWP_MATCH_TYPE_MISMATCH"},
+	{STATUS_FWP_TYPE_MISMATCH, -EIO, "STATUS_FWP_TYPE_MISMATCH"},
+	{STATUS_FWP_OUT_OF_BOUNDS, -EIO, "STATUS_FWP_OUT_OF_BOUNDS"},
+	{STATUS_FWP_RESERVED, -EIO, "STATUS_FWP_RESERVED"},
+	{STATUS_FWP_DUPLICATE_CONDITION, -EIO,
+	"STATUS_FWP_DUPLICATE_CONDITION"},
+	{STATUS_FWP_DUPLICATE_KEYMOD, -EIO, "STATUS_FWP_DUPLICATE_KEYMOD"},
+	{STATUS_FWP_ACTION_INCOMPATIBLE_WITH_LAYER, -EIO,
+	"STATUS_FWP_ACTION_INCOMPATIBLE_WITH_LAYER"},
+	{STATUS_FWP_ACTION_INCOMPATIBLE_WITH_SUBLAYER, -EIO,
+	"STATUS_FWP_ACTION_INCOMPATIBLE_WITH_SUBLAYER"},
+	{STATUS_FWP_CONTEXT_INCOMPATIBLE_WITH_LAYER, -EIO,
+	"STATUS_FWP_CONTEXT_INCOMPATIBLE_WITH_LAYER"},
+	{STATUS_FWP_CONTEXT_INCOMPATIBLE_WITH_CALLOUT, -EIO,
+	"STATUS_FWP_CONTEXT_INCOMPATIBLE_WITH_CALLOUT"},
+	{STATUS_FWP_INCOMPATIBLE_AUTH_METHOD, -EIO,
+	"STATUS_FWP_INCOMPATIBLE_AUTH_METHOD"},
+	{STATUS_FWP_INCOMPATIBLE_DH_GROUP, -EIO,
+	"STATUS_FWP_INCOMPATIBLE_DH_GROUP"},
+	{STATUS_FWP_EM_NOT_SUPPORTED, -EOPNOTSUPP,
+	"STATUS_FWP_EM_NOT_SUPPORTED"},
+	{STATUS_FWP_NEVER_MATCH, -EIO, "STATUS_FWP_NEVER_MATCH"},
+	{STATUS_FWP_PROVIDER_CONTEXT_MISMATCH, -EIO,
+	"STATUS_FWP_PROVIDER_CONTEXT_MISMATCH"},
+	{STATUS_FWP_INVALID_PARAMETER, -EIO, "STATUS_FWP_INVALID_PARAMETER"},
+	{STATUS_FWP_TOO_MANY_SUBLAYERS, -EIO, "STATUS_FWP_TOO_MANY_SUBLAYERS"},
+	{STATUS_FWP_CALLOUT_NOTIFICATION_FAILED, -EIO,
+	"STATUS_FWP_CALLOUT_NOTIFICATION_FAILED"},
+	{STATUS_FWP_INCOMPATIBLE_AUTH_CONFIG, -EIO,
+	"STATUS_FWP_INCOMPATIBLE_AUTH_CONFIG"},
+	{STATUS_FWP_INCOMPATIBLE_CIPHER_CONFIG, -EIO,
+	"STATUS_FWP_INCOMPATIBLE_CIPHER_CONFIG"},
+	{STATUS_FWP_TCPIP_NOT_READY, -EIO, "STATUS_FWP_TCPIP_NOT_READY"},
+	{STATUS_FWP_INJECT_HANDLE_CLOSING, -EIO,
+	"STATUS_FWP_INJECT_HANDLE_CLOSING"},
+	{STATUS_FWP_INJECT_HANDLE_STALE, -EIO,
+	"STATUS_FWP_INJECT_HANDLE_STALE"},
+	{STATUS_FWP_CANNOT_PEND, -EIO, "STATUS_FWP_CANNOT_PEND"},
+	{STATUS_NDIS_CLOSING, -EIO, "STATUS_NDIS_CLOSING"},
+	{STATUS_NDIS_BAD_VERSION, -EIO, "STATUS_NDIS_BAD_VERSION"},
+	{STATUS_NDIS_BAD_CHARACTERISTICS, -EIO,
+	"STATUS_NDIS_BAD_CHARACTERISTICS"},
+	{STATUS_NDIS_ADAPTER_NOT_FOUND, -EIO, "STATUS_NDIS_ADAPTER_NOT_FOUND"},
+	{STATUS_NDIS_OPEN_FAILED, -EIO, "STATUS_NDIS_OPEN_FAILED"},
+	{STATUS_NDIS_DEVICE_FAILED, -EIO, "STATUS_NDIS_DEVICE_FAILED"},
+	{STATUS_NDIS_MULTICAST_FULL, -EIO, "STATUS_NDIS_MULTICAST_FULL"},
+	{STATUS_NDIS_MULTICAST_EXISTS, -EIO, "STATUS_NDIS_MULTICAST_EXISTS"},
+	{STATUS_NDIS_MULTICAST_NOT_FOUND, -EIO,
+	"STATUS_NDIS_MULTICAST_NOT_FOUND"},
+	{STATUS_NDIS_REQUEST_ABORTED, -EIO, "STATUS_NDIS_REQUEST_ABORTED"},
+	{STATUS_NDIS_RESET_IN_PROGRESS, -EIO, "STATUS_NDIS_RESET_IN_PROGRESS"},
+	{STATUS_NDIS_INVALID_PACKET, -EIO, "STATUS_NDIS_INVALID_PACKET"},
+	{STATUS_NDIS_INVALID_DEVICE_REQUEST, -EIO,
+	"STATUS_NDIS_INVALID_DEVICE_REQUEST"},
+	{STATUS_NDIS_ADAPTER_NOT_READY, -EIO, "STATUS_NDIS_ADAPTER_NOT_READY"},
+	{STATUS_NDIS_INVALID_LENGTH, -EIO, "STATUS_NDIS_INVALID_LENGTH"},
+	{STATUS_NDIS_INVALID_DATA, -EIO, "STATUS_NDIS_INVALID_DATA"},
+	{STATUS_NDIS_BUFFER_TOO_SHORT, -ENOBUFS,
+	"STATUS_NDIS_BUFFER_TOO_SHORT"},
+	{STATUS_NDIS_INVALID_OID, -EIO, "STATUS_NDIS_INVALID_OID"},
+	{STATUS_NDIS_ADAPTER_REMOVED, -EIO, "STATUS_NDIS_ADAPTER_REMOVED"},
+	{STATUS_NDIS_UNSUPPORTED_MEDIA, -EIO, "STATUS_NDIS_UNSUPPORTED_MEDIA"},
+	{STATUS_NDIS_GROUP_ADDRESS_IN_USE, -EIO,
+	"STATUS_NDIS_GROUP_ADDRESS_IN_USE"},
+	{STATUS_NDIS_FILE_NOT_FOUND, -EIO, "STATUS_NDIS_FILE_NOT_FOUND"},
+	{STATUS_NDIS_ERROR_READING_FILE, -EIO,
+	"STATUS_NDIS_ERROR_READING_FILE"},
+	{STATUS_NDIS_ALREADY_MAPPED, -EIO, "STATUS_NDIS_ALREADY_MAPPED"},
+	{STATUS_NDIS_RESOURCE_CONFLICT, -EIO, "STATUS_NDIS_RESOURCE_CONFLICT"},
+	{STATUS_NDIS_MEDIA_DISCONNECTED, -EIO,
+	"STATUS_NDIS_MEDIA_DISCONNECTED"},
+	{STATUS_NDIS_INVALID_ADDRESS, -EIO, "STATUS_NDIS_INVALID_ADDRESS"},
+	{STATUS_NDIS_PAUSED, -EIO, "STATUS_NDIS_PAUSED"},
+	{STATUS_NDIS_INTERFACE_NOT_FOUND, -EIO,
+	"STATUS_NDIS_INTERFACE_NOT_FOUND"},
+	{STATUS_NDIS_UNSUPPORTED_REVISION, -EIO,
+	"STATUS_NDIS_UNSUPPORTED_REVISION"},
+	{STATUS_NDIS_INVALID_PORT, -EIO, "STATUS_NDIS_INVALID_PORT"},
+	{STATUS_NDIS_INVALID_PORT_STATE, -EIO,
+	"STATUS_NDIS_INVALID_PORT_STATE"},
+	{STATUS_NDIS_LOW_POWER_STATE, -EIO, "STATUS_NDIS_LOW_POWER_STATE"},
+	{STATUS_NDIS_NOT_SUPPORTED, -ENOSYS, "STATUS_NDIS_NOT_SUPPORTED"},
+	{STATUS_NDIS_DOT11_AUTO_CONFIG_ENABLED, -EIO,
+	"STATUS_NDIS_DOT11_AUTO_CONFIG_ENABLED"},
+	{STATUS_NDIS_DOT11_MEDIA_IN_USE, -EIO,
+	"STATUS_NDIS_DOT11_MEDIA_IN_USE"},
+	{STATUS_NDIS_DOT11_POWER_STATE_INVALID, -EIO,
+	"STATUS_NDIS_DOT11_POWER_STATE_INVALID"},
+	{STATUS_IPSEC_BAD_SPI, -EIO, "STATUS_IPSEC_BAD_SPI"},
+	{STATUS_IPSEC_SA_LIFETIME_EXPIRED, -EIO,
+	"STATUS_IPSEC_SA_LIFETIME_EXPIRED"},
+	{STATUS_IPSEC_WRONG_SA, -EIO, "STATUS_IPSEC_WRONG_SA"},
+	{STATUS_IPSEC_REPLAY_CHECK_FAILED, -EIO,
+	"STATUS_IPSEC_REPLAY_CHECK_FAILED"},
+	{STATUS_IPSEC_INVALID_PACKET, -EIO, "STATUS_IPSEC_INVALID_PACKET"},
+	{STATUS_IPSEC_INTEGRITY_CHECK_FAILED, -EIO,
+	"STATUS_IPSEC_INTEGRITY_CHECK_FAILED"},
+	{STATUS_IPSEC_CLEAR_TEXT_DROP, -EIO, "STATUS_IPSEC_CLEAR_TEXT_DROP"},
+	{0, 0, NULL}
+};
+
+/*****************************************************************************
+ Print an error message from the status code
+ *****************************************************************************/
+static void
+smb2_print_status(__le32 status)
+{
+	int idx = 0;
+
+	while (smb2_error_map_table[idx].status_string != NULL) {
+		if ((smb2_error_map_table[idx].smb2_status) == status) {
+			pr_notice("Status code returned 0x%08x %s\n", status,
+				  smb2_error_map_table[idx].status_string);
+		}
+		idx++;
+	}
+	return;
+}
+
+int
+map_smb2_to_linux_error(char *buf, bool log_err)
+{
+	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
+	unsigned int i;
+	int rc = -EIO;
+	__le32 smb2err = shdr->Status;
+
+	if (smb2err == 0) {
+		trace_smb3_cmd_done(le32_to_cpu(shdr->Id.SyncId.TreeId),
+			      le64_to_cpu(shdr->SessionId),
+			      le16_to_cpu(shdr->Command),
+			      le64_to_cpu(shdr->MessageId));
+		return 0;
+	}
+
+	/* mask facility */
+	if (log_err && (smb2err != STATUS_MORE_PROCESSING_REQUIRED) &&
+	    (smb2err != STATUS_END_OF_FILE))
+		smb2_print_status(smb2err);
+	else if (cifsFYI & CIFS_RC)
+		smb2_print_status(smb2err);
+
+	for (i = 0; i < sizeof(smb2_error_map_table) /
+			sizeof(struct status_to_posix_error); i++) {
+		if (smb2_error_map_table[i].smb2_status == smb2err) {
+			rc = smb2_error_map_table[i].posix_error;
+			break;
+		}
+	}
+
+	/* on error mapping not found  - return EIO */
+
+	cifs_dbg(FYI, "Mapping SMB2 status code 0x%08x to POSIX err %d\n",
+		 __le32_to_cpu(smb2err), rc);
+
+	trace_smb3_cmd_err(le32_to_cpu(shdr->Id.SyncId.TreeId),
+			   le64_to_cpu(shdr->SessionId),
+			   le16_to_cpu(shdr->Command),
+			   le64_to_cpu(shdr->MessageId),
+			   le32_to_cpu(smb2err), rc);
+	return rc;
+}
diff --git a/fs/smb/client/smb2misc.c b/fs/smb/client/smb2misc.c
new file mode 100644
index 0000000000..82b84a4941
--- /dev/null
+++ b/fs/smb/client/smb2misc.c
@@ -0,0 +1,938 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *
+ *   Copyright (C) International Business Machines  Corp., 2002,2011
+ *                 Etersoft, 2012
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *              Pavel Shilovsky (pshilovsky@samba.org) 2012
+ *
+ */
+#include <linux/ctype.h>
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "smb2proto.h"
+#include "cifs_debug.h"
+#include "cifs_unicode.h"
+#include "smb2status.h"
+#include "smb2glob.h"
+#include "nterr.h"
+#include "cached_dir.h"
+
+static int
+check_smb2_hdr(struct smb2_hdr *shdr, __u64 mid)
+{
+	__u64 wire_mid = le64_to_cpu(shdr->MessageId);
+
+	/*
+	 * Make sure that this really is an SMB, that it is a response,
+	 * and that the message ids match.
+	 */
+	if ((shdr->ProtocolId == SMB2_PROTO_NUMBER) &&
+	    (mid == wire_mid)) {
+		if (shdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
+			return 0;
+		else {
+			/* only one valid case where server sends us request */
+			if (shdr->Command == SMB2_OPLOCK_BREAK)
+				return 0;
+			else
+				cifs_dbg(VFS, "Received Request not response\n");
+		}
+	} else { /* bad signature or mid */
+		if (shdr->ProtocolId != SMB2_PROTO_NUMBER)
+			cifs_dbg(VFS, "Bad protocol string signature header %x\n",
+				 le32_to_cpu(shdr->ProtocolId));
+		if (mid != wire_mid)
+			cifs_dbg(VFS, "Mids do not match: %llu and %llu\n",
+				 mid, wire_mid);
+	}
+	cifs_dbg(VFS, "Bad SMB detected. The Mid=%llu\n", wire_mid);
+	return 1;
+}
+
+/*
+ *  The following table defines the expected "StructureSize" of SMB2 responses
+ *  in order by SMB2 command.  This is similar to "wct" in SMB/CIFS responses.
+ *
+ *  Note that commands are defined in smb2pdu.h in le16 but the array below is
+ *  indexed by command in host byte order
+ */
+static const __le16 smb2_rsp_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
+	/* SMB2_NEGOTIATE */ cpu_to_le16(65),
+	/* SMB2_SESSION_SETUP */ cpu_to_le16(9),
+	/* SMB2_LOGOFF */ cpu_to_le16(4),
+	/* SMB2_TREE_CONNECT */ cpu_to_le16(16),
+	/* SMB2_TREE_DISCONNECT */ cpu_to_le16(4),
+	/* SMB2_CREATE */ cpu_to_le16(89),
+	/* SMB2_CLOSE */ cpu_to_le16(60),
+	/* SMB2_FLUSH */ cpu_to_le16(4),
+	/* SMB2_READ */ cpu_to_le16(17),
+	/* SMB2_WRITE */ cpu_to_le16(17),
+	/* SMB2_LOCK */ cpu_to_le16(4),
+	/* SMB2_IOCTL */ cpu_to_le16(49),
+	/* BB CHECK this ... not listed in documentation */
+	/* SMB2_CANCEL */ cpu_to_le16(0),
+	/* SMB2_ECHO */ cpu_to_le16(4),
+	/* SMB2_QUERY_DIRECTORY */ cpu_to_le16(9),
+	/* SMB2_CHANGE_NOTIFY */ cpu_to_le16(9),
+	/* SMB2_QUERY_INFO */ cpu_to_le16(9),
+	/* SMB2_SET_INFO */ cpu_to_le16(2),
+	/* BB FIXME can also be 44 for lease break */
+	/* SMB2_OPLOCK_BREAK */ cpu_to_le16(24)
+};
+
+#define SMB311_NEGPROT_BASE_SIZE (sizeof(struct smb2_hdr) + sizeof(struct smb2_negotiate_rsp))
+
+static __u32 get_neg_ctxt_len(struct smb2_hdr *hdr, __u32 len,
+			      __u32 non_ctxlen)
+{
+	__u16 neg_count;
+	__u32 nc_offset, size_of_pad_before_neg_ctxts;
+	struct smb2_negotiate_rsp *pneg_rsp = (struct smb2_negotiate_rsp *)hdr;
+
+	/* Negotiate contexts are only valid for latest dialect SMB3.11 */
+	neg_count = le16_to_cpu(pneg_rsp->NegotiateContextCount);
+	if ((neg_count == 0) ||
+	   (pneg_rsp->DialectRevision != cpu_to_le16(SMB311_PROT_ID)))
+		return 0;
+
+	/*
+	 * if SPNEGO blob present (ie the RFC2478 GSS info which indicates
+	 * which security mechanisms the server supports) make sure that
+	 * the negotiate contexts start after it
+	 */
+	nc_offset = le32_to_cpu(pneg_rsp->NegotiateContextOffset);
+	/*
+	 * non_ctxlen is at least shdr->StructureSize + pdu->StructureSize2
+	 * and the latter is 1 byte bigger than the fix-sized area of the
+	 * NEGOTIATE response
+	 */
+	if (nc_offset + 1 < non_ctxlen) {
+		pr_warn_once("Invalid negotiate context offset %d\n", nc_offset);
+		return 0;
+	} else if (nc_offset + 1 == non_ctxlen) {
+		cifs_dbg(FYI, "no SPNEGO security blob in negprot rsp\n");
+		size_of_pad_before_neg_ctxts = 0;
+	} else if (non_ctxlen == SMB311_NEGPROT_BASE_SIZE + 1)
+		/* has padding, but no SPNEGO blob */
+		size_of_pad_before_neg_ctxts = nc_offset - non_ctxlen + 1;
+	else
+		size_of_pad_before_neg_ctxts = nc_offset - non_ctxlen;
+
+	/* Verify that at least minimal negotiate contexts fit within frame */
+	if (len < nc_offset + (neg_count * sizeof(struct smb2_neg_context))) {
+		pr_warn_once("negotiate context goes beyond end\n");
+		return 0;
+	}
+
+	cifs_dbg(FYI, "length of negcontexts %d pad %d\n",
+		len - nc_offset, size_of_pad_before_neg_ctxts);
+
+	/* length of negcontexts including pad from end of sec blob to them */
+	return (len - nc_offset) + size_of_pad_before_neg_ctxts;
+}
+
+int
+smb2_check_message(char *buf, unsigned int len, struct TCP_Server_Info *server)
+{
+	struct TCP_Server_Info *pserver;
+	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
+	struct smb2_pdu *pdu = (struct smb2_pdu *)shdr;
+	int hdr_size = sizeof(struct smb2_hdr);
+	int pdu_size = sizeof(struct smb2_pdu);
+	int command;
+	__u32 calc_len; /* calculated length */
+	__u64 mid;
+
+	/* If server is a channel, select the primary channel */
+	pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
+
+	/*
+	 * Add function to do table lookup of StructureSize by command
+	 * ie Validate the wct via smb2_struct_sizes table above
+	 */
+	if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
+		struct smb2_transform_hdr *thdr =
+			(struct smb2_transform_hdr *)buf;
+		struct cifs_ses *ses = NULL;
+		struct cifs_ses *iter;
+
+		/* decrypt frame now that it is completely read in */
+		spin_lock(&cifs_tcp_ses_lock);
+		list_for_each_entry(iter, &pserver->smb_ses_list, smb_ses_list) {
+			if (iter->Suid == le64_to_cpu(thdr->SessionId)) {
+				ses = iter;
+				break;
+			}
+		}
+		spin_unlock(&cifs_tcp_ses_lock);
+		if (!ses) {
+			cifs_dbg(VFS, "no decryption - session id not found\n");
+			return 1;
+		}
+	}
+
+	mid = le64_to_cpu(shdr->MessageId);
+	if (check_smb2_hdr(shdr, mid))
+		return 1;
+
+	if (shdr->StructureSize != SMB2_HEADER_STRUCTURE_SIZE) {
+		cifs_dbg(VFS, "Invalid structure size %u\n",
+			 le16_to_cpu(shdr->StructureSize));
+		return 1;
+	}
+
+	command = le16_to_cpu(shdr->Command);
+	if (command >= NUMBER_OF_SMB2_COMMANDS) {
+		cifs_dbg(VFS, "Invalid SMB2 command %d\n", command);
+		return 1;
+	}
+
+	if (len < pdu_size) {
+		if ((len >= hdr_size)
+		    && (shdr->Status != 0)) {
+			pdu->StructureSize2 = 0;
+			/*
+			 * As with SMB/CIFS, on some error cases servers may
+			 * not return wct properly
+			 */
+			return 0;
+		} else {
+			cifs_dbg(VFS, "Length less than SMB header size\n");
+		}
+		return 1;
+	}
+	if (len > CIFSMaxBufSize + MAX_SMB2_HDR_SIZE) {
+		cifs_dbg(VFS, "SMB length greater than maximum, mid=%llu\n",
+			 mid);
+		return 1;
+	}
+
+	if (smb2_rsp_struct_sizes[command] != pdu->StructureSize2) {
+		if (command != SMB2_OPLOCK_BREAK_HE && (shdr->Status == 0 ||
+		    pdu->StructureSize2 != SMB2_ERROR_STRUCTURE_SIZE2_LE)) {
+			/* error packets have 9 byte structure size */
+			cifs_dbg(VFS, "Invalid response size %u for command %d\n",
+				 le16_to_cpu(pdu->StructureSize2), command);
+			return 1;
+		} else if (command == SMB2_OPLOCK_BREAK_HE
+			   && (shdr->Status == 0)
+			   && (le16_to_cpu(pdu->StructureSize2) != 44)
+			   && (le16_to_cpu(pdu->StructureSize2) != 36)) {
+			/* special case for SMB2.1 lease break message */
+			cifs_dbg(VFS, "Invalid response size %d for oplock break\n",
+				 le16_to_cpu(pdu->StructureSize2));
+			return 1;
+		}
+	}
+
+	calc_len = smb2_calc_size(buf);
+
+	/* For SMB2_IOCTL, OutputOffset and OutputLength are optional, so might
+	 * be 0, and not a real miscalculation */
+	if (command == SMB2_IOCTL_HE && calc_len == 0)
+		return 0;
+
+	if (command == SMB2_NEGOTIATE_HE)
+		calc_len += get_neg_ctxt_len(shdr, len, calc_len);
+
+	if (len != calc_len) {
+		/* create failed on symlink */
+		if (command == SMB2_CREATE_HE &&
+		    shdr->Status == STATUS_STOPPED_ON_SYMLINK)
+			return 0;
+		/* Windows 7 server returns 24 bytes more */
+		if (calc_len + 24 == len && command == SMB2_OPLOCK_BREAK_HE)
+			return 0;
+		/* server can return one byte more due to implied bcc[0] */
+		if (calc_len == len + 1)
+			return 0;
+
+		/*
+		 * Some windows servers (win2016) will pad also the final
+		 * PDU in a compound to 8 bytes.
+		 */
+		if (ALIGN(calc_len, 8) == len)
+			return 0;
+
+		/*
+		 * MacOS server pads after SMB2.1 write response with 3 bytes
+		 * of junk. Other servers match RFC1001 len to actual
+		 * SMB2/SMB3 frame length (header + smb2 response specific data)
+		 * Some windows servers also pad up to 8 bytes when compounding.
+		 */
+		if (calc_len < len)
+			return 0;
+
+		/* Only log a message if len was really miscalculated */
+		if (unlikely(cifsFYI))
+			cifs_dbg(FYI, "Server response too short: calculated "
+				 "length %u doesn't match read length %u (cmd=%d, mid=%llu)\n",
+				 calc_len, len, command, mid);
+		else
+			pr_warn("Server response too short: calculated length "
+				"%u doesn't match read length %u (cmd=%d, mid=%llu)\n",
+				calc_len, len, command, mid);
+
+		return 1;
+	}
+	return 0;
+}
+
+/*
+ * The size of the variable area depends on the offset and length fields
+ * located in different fields for various SMB2 responses. SMB2 responses
+ * with no variable length info, show an offset of zero for the offset field.
+ */
+static const bool has_smb2_data_area[NUMBER_OF_SMB2_COMMANDS] = {
+	/* SMB2_NEGOTIATE */ true,
+	/* SMB2_SESSION_SETUP */ true,
+	/* SMB2_LOGOFF */ false,
+	/* SMB2_TREE_CONNECT */	false,
+	/* SMB2_TREE_DISCONNECT */ false,
+	/* SMB2_CREATE */ true,
+	/* SMB2_CLOSE */ false,
+	/* SMB2_FLUSH */ false,
+	/* SMB2_READ */	true,
+	/* SMB2_WRITE */ false,
+	/* SMB2_LOCK */	false,
+	/* SMB2_IOCTL */ true,
+	/* SMB2_CANCEL */ false, /* BB CHECK this not listed in documentation */
+	/* SMB2_ECHO */ false,
+	/* SMB2_QUERY_DIRECTORY */ true,
+	/* SMB2_CHANGE_NOTIFY */ true,
+	/* SMB2_QUERY_INFO */ true,
+	/* SMB2_SET_INFO */ false,
+	/* SMB2_OPLOCK_BREAK */ false
+};
+
+/*
+ * Returns the pointer to the beginning of the data area. Length of the data
+ * area and the offset to it (from the beginning of the smb are also returned.
+ */
+char *
+smb2_get_data_area_len(int *off, int *len, struct smb2_hdr *shdr)
+{
+	const int max_off = 4096;
+	const int max_len = 128 * 1024;
+
+	*off = 0;
+	*len = 0;
+
+	/* error responses do not have data area */
+	if (shdr->Status && shdr->Status != STATUS_MORE_PROCESSING_REQUIRED &&
+	    (((struct smb2_err_rsp *)shdr)->StructureSize) ==
+						SMB2_ERROR_STRUCTURE_SIZE2_LE)
+		return NULL;
+
+	/*
+	 * Following commands have data areas so we have to get the location
+	 * of the data buffer offset and data buffer length for the particular
+	 * command.
+	 */
+	switch (shdr->Command) {
+	case SMB2_NEGOTIATE:
+		*off = le16_to_cpu(
+		  ((struct smb2_negotiate_rsp *)shdr)->SecurityBufferOffset);
+		*len = le16_to_cpu(
+		  ((struct smb2_negotiate_rsp *)shdr)->SecurityBufferLength);
+		break;
+	case SMB2_SESSION_SETUP:
+		*off = le16_to_cpu(
+		  ((struct smb2_sess_setup_rsp *)shdr)->SecurityBufferOffset);
+		*len = le16_to_cpu(
+		  ((struct smb2_sess_setup_rsp *)shdr)->SecurityBufferLength);
+		break;
+	case SMB2_CREATE:
+		*off = le32_to_cpu(
+		    ((struct smb2_create_rsp *)shdr)->CreateContextsOffset);
+		*len = le32_to_cpu(
+		    ((struct smb2_create_rsp *)shdr)->CreateContextsLength);
+		break;
+	case SMB2_QUERY_INFO:
+		*off = le16_to_cpu(
+		    ((struct smb2_query_info_rsp *)shdr)->OutputBufferOffset);
+		*len = le32_to_cpu(
+		    ((struct smb2_query_info_rsp *)shdr)->OutputBufferLength);
+		break;
+	case SMB2_READ:
+		/* TODO: is this a bug ? */
+		*off = ((struct smb2_read_rsp *)shdr)->DataOffset;
+		*len = le32_to_cpu(((struct smb2_read_rsp *)shdr)->DataLength);
+		break;
+	case SMB2_QUERY_DIRECTORY:
+		*off = le16_to_cpu(
+		  ((struct smb2_query_directory_rsp *)shdr)->OutputBufferOffset);
+		*len = le32_to_cpu(
+		  ((struct smb2_query_directory_rsp *)shdr)->OutputBufferLength);
+		break;
+	case SMB2_IOCTL:
+		*off = le32_to_cpu(
+		  ((struct smb2_ioctl_rsp *)shdr)->OutputOffset);
+		*len = le32_to_cpu(
+		  ((struct smb2_ioctl_rsp *)shdr)->OutputCount);
+		break;
+	case SMB2_CHANGE_NOTIFY:
+		*off = le16_to_cpu(
+		  ((struct smb2_change_notify_rsp *)shdr)->OutputBufferOffset);
+		*len = le32_to_cpu(
+		  ((struct smb2_change_notify_rsp *)shdr)->OutputBufferLength);
+		break;
+	default:
+		cifs_dbg(VFS, "no length check for command %d\n", le16_to_cpu(shdr->Command));
+		break;
+	}
+
+	/*
+	 * Invalid length or offset probably means data area is invalid, but
+	 * we have little choice but to ignore the data area in this case.
+	 */
+	if (unlikely(*off < 0 || *off > max_off ||
+		     *len < 0 || *len > max_len)) {
+		cifs_dbg(VFS, "%s: invalid data area (off=%d len=%d)\n",
+			 __func__, *off, *len);
+		*off = 0;
+		*len = 0;
+	} else if (*off == 0) {
+		*len = 0;
+	}
+
+	/* return pointer to beginning of data area, ie offset from SMB start */
+	if (*off > 0 && *len > 0)
+		return (char *)shdr + *off;
+	return NULL;
+}
+
+/*
+ * Calculate the size of the SMB message based on the fixed header
+ * portion, the number of word parameters and the data portion of the message.
+ */
+unsigned int
+smb2_calc_size(void *buf)
+{
+	struct smb2_pdu *pdu = buf;
+	struct smb2_hdr *shdr = &pdu->hdr;
+	int offset; /* the offset from the beginning of SMB to data area */
+	int data_length; /* the length of the variable length data area */
+	/* Structure Size has already been checked to make sure it is 64 */
+	int len = le16_to_cpu(shdr->StructureSize);
+
+	/*
+	 * StructureSize2, ie length of fixed parameter area has already
+	 * been checked to make sure it is the correct length.
+	 */
+	len += le16_to_cpu(pdu->StructureSize2);
+
+	if (has_smb2_data_area[le16_to_cpu(shdr->Command)] == false)
+		goto calc_size_exit;
+
+	smb2_get_data_area_len(&offset, &data_length, shdr);
+	cifs_dbg(FYI, "SMB2 data length %d offset %d\n", data_length, offset);
+
+	if (data_length > 0) {
+		/*
+		 * Check to make sure that data area begins after fixed area,
+		 * Note that last byte of the fixed area is part of data area
+		 * for some commands, typically those with odd StructureSize,
+		 * so we must add one to the calculation.
+		 */
+		if (offset + 1 < len) {
+			cifs_dbg(VFS, "data area offset %d overlaps SMB2 header %d\n",
+				 offset + 1, len);
+			data_length = 0;
+		} else {
+			len = offset + data_length;
+		}
+	}
+calc_size_exit:
+	cifs_dbg(FYI, "SMB2 len %d\n", len);
+	return len;
+}
+
+/* Note: caller must free return buffer */
+__le16 *
+cifs_convert_path_to_utf16(const char *from, struct cifs_sb_info *cifs_sb)
+{
+	int len;
+	const char *start_of_path;
+	__le16 *to;
+	int map_type;
+
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SFM_CHR)
+		map_type = SFM_MAP_UNI_RSVD;
+	else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
+		map_type = SFU_MAP_UNI_RSVD;
+	else
+		map_type = NO_MAP_UNI_RSVD;
+
+	/* Windows doesn't allow paths beginning with \ */
+	if (from[0] == '\\')
+		start_of_path = from + 1;
+
+	/* SMB311 POSIX extensions paths do not include leading slash */
+	else if (cifs_sb_master_tlink(cifs_sb) &&
+		 cifs_sb_master_tcon(cifs_sb)->posix_extensions &&
+		 (from[0] == '/')) {
+		start_of_path = from + 1;
+	} else
+		start_of_path = from;
+
+	to = cifs_strndup_to_utf16(start_of_path, PATH_MAX, &len,
+				   cifs_sb->local_nls, map_type);
+	return to;
+}
+
+__le32
+smb2_get_lease_state(struct cifsInodeInfo *cinode)
+{
+	__le32 lease = 0;
+
+	if (CIFS_CACHE_WRITE(cinode))
+		lease |= SMB2_LEASE_WRITE_CACHING_LE;
+	if (CIFS_CACHE_HANDLE(cinode))
+		lease |= SMB2_LEASE_HANDLE_CACHING_LE;
+	if (CIFS_CACHE_READ(cinode))
+		lease |= SMB2_LEASE_READ_CACHING_LE;
+	return lease;
+}
+
+struct smb2_lease_break_work {
+	struct work_struct lease_break;
+	struct tcon_link *tlink;
+	__u8 lease_key[16];
+	__le32 lease_state;
+};
+
+static void
+cifs_ses_oplock_break(struct work_struct *work)
+{
+	struct smb2_lease_break_work *lw = container_of(work,
+				struct smb2_lease_break_work, lease_break);
+	int rc = 0;
+
+	rc = SMB2_lease_break(0, tlink_tcon(lw->tlink), lw->lease_key,
+			      lw->lease_state);
+
+	cifs_dbg(FYI, "Lease release rc %d\n", rc);
+	cifs_put_tlink(lw->tlink);
+	kfree(lw);
+}
+
+static void
+smb2_queue_pending_open_break(struct tcon_link *tlink, __u8 *lease_key,
+			      __le32 new_lease_state)
+{
+	struct smb2_lease_break_work *lw;
+
+	lw = kmalloc(sizeof(struct smb2_lease_break_work), GFP_KERNEL);
+	if (!lw) {
+		cifs_put_tlink(tlink);
+		return;
+	}
+
+	INIT_WORK(&lw->lease_break, cifs_ses_oplock_break);
+	lw->tlink = tlink;
+	lw->lease_state = new_lease_state;
+	memcpy(lw->lease_key, lease_key, SMB2_LEASE_KEY_SIZE);
+	queue_work(cifsiod_wq, &lw->lease_break);
+}
+
+static bool
+smb2_tcon_has_lease(struct cifs_tcon *tcon, struct smb2_lease_break *rsp)
+{
+	__u8 lease_state;
+	struct cifsFileInfo *cfile;
+	struct cifsInodeInfo *cinode;
+	int ack_req = le32_to_cpu(rsp->Flags &
+				  SMB2_NOTIFY_BREAK_LEASE_FLAG_ACK_REQUIRED);
+
+	lease_state = le32_to_cpu(rsp->NewLeaseState);
+
+	list_for_each_entry(cfile, &tcon->openFileList, tlist) {
+		cinode = CIFS_I(d_inode(cfile->dentry));
+
+		if (memcmp(cinode->lease_key, rsp->LeaseKey,
+							SMB2_LEASE_KEY_SIZE))
+			continue;
+
+		cifs_dbg(FYI, "found in the open list\n");
+		cifs_dbg(FYI, "lease key match, lease break 0x%x\n",
+			 lease_state);
+
+		if (ack_req)
+			cfile->oplock_break_cancelled = false;
+		else
+			cfile->oplock_break_cancelled = true;
+
+		set_bit(CIFS_INODE_PENDING_OPLOCK_BREAK, &cinode->flags);
+
+		cfile->oplock_epoch = le16_to_cpu(rsp->Epoch);
+		cfile->oplock_level = lease_state;
+
+		cifs_queue_oplock_break(cfile);
+		return true;
+	}
+
+	return false;
+}
+
+static struct cifs_pending_open *
+smb2_tcon_find_pending_open_lease(struct cifs_tcon *tcon,
+				  struct smb2_lease_break *rsp)
+{
+	__u8 lease_state = le32_to_cpu(rsp->NewLeaseState);
+	int ack_req = le32_to_cpu(rsp->Flags &
+				  SMB2_NOTIFY_BREAK_LEASE_FLAG_ACK_REQUIRED);
+	struct cifs_pending_open *open;
+	struct cifs_pending_open *found = NULL;
+
+	list_for_each_entry(open, &tcon->pending_opens, olist) {
+		if (memcmp(open->lease_key, rsp->LeaseKey,
+			   SMB2_LEASE_KEY_SIZE))
+			continue;
+
+		if (!found && ack_req) {
+			found = open;
+		}
+
+		cifs_dbg(FYI, "found in the pending open list\n");
+		cifs_dbg(FYI, "lease key match, lease break 0x%x\n",
+			 lease_state);
+
+		open->oplock = lease_state;
+	}
+
+	return found;
+}
+
+static bool
+smb2_is_valid_lease_break(char *buffer, struct TCP_Server_Info *server)
+{
+	struct smb2_lease_break *rsp = (struct smb2_lease_break *)buffer;
+	struct TCP_Server_Info *pserver;
+	struct cifs_ses *ses;
+	struct cifs_tcon *tcon;
+	struct cifs_pending_open *open;
+
+	cifs_dbg(FYI, "Checking for lease break\n");
+
+	/* If server is a channel, select the primary channel */
+	pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
+
+	/* look up tcon based on tid & uid */
+	spin_lock(&cifs_tcp_ses_lock);
+	list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
+		list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
+			spin_lock(&tcon->open_file_lock);
+			cifs_stats_inc(
+				       &tcon->stats.cifs_stats.num_oplock_brks);
+			if (smb2_tcon_has_lease(tcon, rsp)) {
+				spin_unlock(&tcon->open_file_lock);
+				spin_unlock(&cifs_tcp_ses_lock);
+				return true;
+			}
+			open = smb2_tcon_find_pending_open_lease(tcon,
+								 rsp);
+			if (open) {
+				__u8 lease_key[SMB2_LEASE_KEY_SIZE];
+				struct tcon_link *tlink;
+
+				tlink = cifs_get_tlink(open->tlink);
+				memcpy(lease_key, open->lease_key,
+				       SMB2_LEASE_KEY_SIZE);
+				spin_unlock(&tcon->open_file_lock);
+				spin_unlock(&cifs_tcp_ses_lock);
+				smb2_queue_pending_open_break(tlink,
+							      lease_key,
+							      rsp->NewLeaseState);
+				return true;
+			}
+			spin_unlock(&tcon->open_file_lock);
+
+			if (cached_dir_lease_break(tcon, rsp->LeaseKey)) {
+				spin_unlock(&cifs_tcp_ses_lock);
+				return true;
+			}
+		}
+	}
+	spin_unlock(&cifs_tcp_ses_lock);
+	cifs_dbg(FYI, "Can not process lease break - no lease matched\n");
+	trace_smb3_lease_not_found(le32_to_cpu(rsp->CurrentLeaseState),
+				   le32_to_cpu(rsp->hdr.Id.SyncId.TreeId),
+				   le64_to_cpu(rsp->hdr.SessionId),
+				   *((u64 *)rsp->LeaseKey),
+				   *((u64 *)&rsp->LeaseKey[8]));
+
+	return false;
+}
+
+bool
+smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server)
+{
+	struct smb2_oplock_break *rsp = (struct smb2_oplock_break *)buffer;
+	struct TCP_Server_Info *pserver;
+	struct cifs_ses *ses;
+	struct cifs_tcon *tcon;
+	struct cifsInodeInfo *cinode;
+	struct cifsFileInfo *cfile;
+
+	cifs_dbg(FYI, "Checking for oplock break\n");
+
+	if (rsp->hdr.Command != SMB2_OPLOCK_BREAK)
+		return false;
+
+	if (rsp->StructureSize !=
+				smb2_rsp_struct_sizes[SMB2_OPLOCK_BREAK_HE]) {
+		if (le16_to_cpu(rsp->StructureSize) == 44)
+			return smb2_is_valid_lease_break(buffer, server);
+		else
+			return false;
+	}
+
+	cifs_dbg(FYI, "oplock level 0x%x\n", rsp->OplockLevel);
+
+	/* If server is a channel, select the primary channel */
+	pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
+
+	/* look up tcon based on tid & uid */
+	spin_lock(&cifs_tcp_ses_lock);
+	list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
+		list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
+
+			spin_lock(&tcon->open_file_lock);
+			list_for_each_entry(cfile, &tcon->openFileList, tlist) {
+				if (rsp->PersistentFid !=
+				    cfile->fid.persistent_fid ||
+				    rsp->VolatileFid !=
+				    cfile->fid.volatile_fid)
+					continue;
+
+				cifs_dbg(FYI, "file id match, oplock break\n");
+				cifs_stats_inc(
+				    &tcon->stats.cifs_stats.num_oplock_brks);
+				cinode = CIFS_I(d_inode(cfile->dentry));
+				spin_lock(&cfile->file_info_lock);
+				if (!CIFS_CACHE_WRITE(cinode) &&
+				    rsp->OplockLevel == SMB2_OPLOCK_LEVEL_NONE)
+					cfile->oplock_break_cancelled = true;
+				else
+					cfile->oplock_break_cancelled = false;
+
+				set_bit(CIFS_INODE_PENDING_OPLOCK_BREAK,
+					&cinode->flags);
+
+				cfile->oplock_epoch = 0;
+				cfile->oplock_level = rsp->OplockLevel;
+
+				spin_unlock(&cfile->file_info_lock);
+
+				cifs_queue_oplock_break(cfile);
+
+				spin_unlock(&tcon->open_file_lock);
+				spin_unlock(&cifs_tcp_ses_lock);
+				return true;
+			}
+			spin_unlock(&tcon->open_file_lock);
+		}
+	}
+	spin_unlock(&cifs_tcp_ses_lock);
+	cifs_dbg(FYI, "No file id matched, oplock break ignored\n");
+	trace_smb3_oplock_not_found(0 /* no xid */, rsp->PersistentFid,
+				  le32_to_cpu(rsp->hdr.Id.SyncId.TreeId),
+				  le64_to_cpu(rsp->hdr.SessionId));
+
+	return true;
+}
+
+void
+smb2_cancelled_close_fid(struct work_struct *work)
+{
+	struct close_cancelled_open *cancelled = container_of(work,
+					struct close_cancelled_open, work);
+	struct cifs_tcon *tcon = cancelled->tcon;
+	int rc;
+
+	if (cancelled->mid)
+		cifs_tcon_dbg(VFS, "Close unmatched open for MID:%llu\n",
+			      cancelled->mid);
+	else
+		cifs_tcon_dbg(VFS, "Close interrupted close\n");
+
+	rc = SMB2_close(0, tcon, cancelled->fid.persistent_fid,
+			cancelled->fid.volatile_fid);
+	if (rc)
+		cifs_tcon_dbg(VFS, "Close cancelled mid failed rc:%d\n", rc);
+
+	cifs_put_tcon(tcon);
+	kfree(cancelled);
+}
+
+/*
+ * Caller should already has an extra reference to @tcon
+ * This function is used to queue work to close a handle to prevent leaks
+ * on the server.
+ * We handle two cases. If an open was interrupted after we sent the
+ * SMB2_CREATE to the server but before we processed the reply, and second
+ * if a close was interrupted before we sent the SMB2_CLOSE to the server.
+ */
+static int
+__smb2_handle_cancelled_cmd(struct cifs_tcon *tcon, __u16 cmd, __u64 mid,
+			    __u64 persistent_fid, __u64 volatile_fid)
+{
+	struct close_cancelled_open *cancelled;
+
+	cancelled = kzalloc(sizeof(*cancelled), GFP_KERNEL);
+	if (!cancelled)
+		return -ENOMEM;
+
+	cancelled->fid.persistent_fid = persistent_fid;
+	cancelled->fid.volatile_fid = volatile_fid;
+	cancelled->tcon = tcon;
+	cancelled->cmd = cmd;
+	cancelled->mid = mid;
+	INIT_WORK(&cancelled->work, smb2_cancelled_close_fid);
+	WARN_ON(queue_work(cifsiod_wq, &cancelled->work) == false);
+
+	return 0;
+}
+
+int
+smb2_handle_cancelled_close(struct cifs_tcon *tcon, __u64 persistent_fid,
+			    __u64 volatile_fid)
+{
+	int rc;
+
+	cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count);
+	spin_lock(&cifs_tcp_ses_lock);
+	if (tcon->tc_count <= 0) {
+		struct TCP_Server_Info *server = NULL;
+
+		WARN_ONCE(tcon->tc_count < 0, "tcon refcount is negative");
+		spin_unlock(&cifs_tcp_ses_lock);
+
+		if (tcon->ses)
+			server = tcon->ses->server;
+
+		cifs_server_dbg(FYI, "tid=0x%x: tcon is closing, skipping async close retry of fid %llu %llu\n",
+				tcon->tid, persistent_fid, volatile_fid);
+
+		return 0;
+	}
+	tcon->tc_count++;
+	spin_unlock(&cifs_tcp_ses_lock);
+
+	rc = __smb2_handle_cancelled_cmd(tcon, SMB2_CLOSE_HE, 0,
+					 persistent_fid, volatile_fid);
+	if (rc)
+		cifs_put_tcon(tcon);
+
+	return rc;
+}
+
+int
+smb2_handle_cancelled_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server)
+{
+	struct smb2_hdr *hdr = mid->resp_buf;
+	struct smb2_create_rsp *rsp = mid->resp_buf;
+	struct cifs_tcon *tcon;
+	int rc;
+
+	if ((mid->optype & CIFS_CP_CREATE_CLOSE_OP) || hdr->Command != SMB2_CREATE ||
+	    hdr->Status != STATUS_SUCCESS)
+		return 0;
+
+	tcon = smb2_find_smb_tcon(server, le64_to_cpu(hdr->SessionId),
+				  le32_to_cpu(hdr->Id.SyncId.TreeId));
+	if (!tcon)
+		return -ENOENT;
+
+	rc = __smb2_handle_cancelled_cmd(tcon,
+					 le16_to_cpu(hdr->Command),
+					 le64_to_cpu(hdr->MessageId),
+					 rsp->PersistentFileId,
+					 rsp->VolatileFileId);
+	if (rc)
+		cifs_put_tcon(tcon);
+
+	return rc;
+}
+
+/**
+ * smb311_update_preauth_hash - update @ses hash with the packet data in @iov
+ *
+ * Assumes @iov does not contain the rfc1002 length and iov[0] has the
+ * SMB2 header.
+ *
+ * @ses:	server session structure
+ * @server:	pointer to server info
+ * @iov:	array containing the SMB request we will send to the server
+ * @nvec:	number of array entries for the iov
+ */
+int
+smb311_update_preauth_hash(struct cifs_ses *ses, struct TCP_Server_Info *server,
+			   struct kvec *iov, int nvec)
+{
+	int i, rc;
+	struct smb2_hdr *hdr;
+	struct shash_desc *sha512 = NULL;
+
+	hdr = (struct smb2_hdr *)iov[0].iov_base;
+	/* neg prot are always taken */
+	if (hdr->Command == SMB2_NEGOTIATE)
+		goto ok;
+
+	/*
+	 * If we process a command which wasn't a negprot it means the
+	 * neg prot was already done, so the server dialect was set
+	 * and we can test it. Preauth requires 3.1.1 for now.
+	 */
+	if (server->dialect != SMB311_PROT_ID)
+		return 0;
+
+	if (hdr->Command != SMB2_SESSION_SETUP)
+		return 0;
+
+	/* skip last sess setup response */
+	if ((hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
+	    && (hdr->Status == NT_STATUS_OK
+		|| (hdr->Status !=
+		    cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))))
+		return 0;
+
+ok:
+	rc = smb311_crypto_shash_allocate(server);
+	if (rc)
+		return rc;
+
+	sha512 = server->secmech.sha512;
+	rc = crypto_shash_init(sha512);
+	if (rc) {
+		cifs_dbg(VFS, "%s: Could not init sha512 shash\n", __func__);
+		return rc;
+	}
+
+	rc = crypto_shash_update(sha512, ses->preauth_sha_hash,
+				 SMB2_PREAUTH_HASH_SIZE);
+	if (rc) {
+		cifs_dbg(VFS, "%s: Could not update sha512 shash\n", __func__);
+		return rc;
+	}
+
+	for (i = 0; i < nvec; i++) {
+		rc = crypto_shash_update(sha512, iov[i].iov_base, iov[i].iov_len);
+		if (rc) {
+			cifs_dbg(VFS, "%s: Could not update sha512 shash\n",
+				 __func__);
+			return rc;
+		}
+	}
+
+	rc = crypto_shash_final(sha512, ses->preauth_sha_hash);
+	if (rc) {
+		cifs_dbg(VFS, "%s: Could not finalize sha512 shash\n",
+			 __func__);
+		return rc;
+	}
+
+	return 0;
+}
diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c
new file mode 100644
index 0000000000..e33ed0fbc3
--- /dev/null
+++ b/fs/smb/client/smb2ops.c
@@ -0,0 +1,5780 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  SMB2 version specific operations
+ *
+ *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
+ */
+
+#include <linux/pagemap.h>
+#include <linux/vfs.h>
+#include <linux/falloc.h>
+#include <linux/scatterlist.h>
+#include <linux/uuid.h>
+#include <linux/sort.h>
+#include <crypto/aead.h>
+#include <linux/fiemap.h>
+#include <uapi/linux/magic.h>
+#include "cifsfs.h"
+#include "cifsglob.h"
+#include "smb2pdu.h"
+#include "smb2proto.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifs_unicode.h"
+#include "smb2status.h"
+#include "smb2glob.h"
+#include "cifs_ioctl.h"
+#include "smbdirect.h"
+#include "fscache.h"
+#include "fs_context.h"
+#include "cached_dir.h"
+
+/* Change credits for different ops and return the total number of credits */
+static int
+change_conf(struct TCP_Server_Info *server)
+{
+	server->credits += server->echo_credits + server->oplock_credits;
+	if (server->credits > server->max_credits)
+		server->credits = server->max_credits;
+	server->oplock_credits = server->echo_credits = 0;
+	switch (server->credits) {
+	case 0:
+		return 0;
+	case 1:
+		server->echoes = false;
+		server->oplocks = false;
+		break;
+	case 2:
+		server->echoes = true;
+		server->oplocks = false;
+		server->echo_credits = 1;
+		break;
+	default:
+		server->echoes = true;
+		if (enable_oplocks) {
+			server->oplocks = true;
+			server->oplock_credits = 1;
+		} else
+			server->oplocks = false;
+
+		server->echo_credits = 1;
+	}
+	server->credits -= server->echo_credits + server->oplock_credits;
+	return server->credits + server->echo_credits + server->oplock_credits;
+}
+
+static void
+smb2_add_credits(struct TCP_Server_Info *server,
+		 const struct cifs_credits *credits, const int optype)
+{
+	int *val, rc = -1;
+	int scredits, in_flight;
+	unsigned int add = credits->value;
+	unsigned int instance = credits->instance;
+	bool reconnect_detected = false;
+	bool reconnect_with_invalid_credits = false;
+
+	spin_lock(&server->req_lock);
+	val = server->ops->get_credits_field(server, optype);
+
+	/* eg found case where write overlapping reconnect messed up credits */
+	if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
+		reconnect_with_invalid_credits = true;
+
+	if ((instance == 0) || (instance == server->reconnect_instance))
+		*val += add;
+	else
+		reconnect_detected = true;
+
+	if (*val > 65000) {
+		*val = 65000; /* Don't get near 64K credits, avoid srv bugs */
+		pr_warn_once("server overflowed SMB3 credits\n");
+		trace_smb3_overflow_credits(server->CurrentMid,
+					    server->conn_id, server->hostname, *val,
+					    add, server->in_flight);
+	}
+	WARN_ON_ONCE(server->in_flight == 0);
+	server->in_flight--;
+	if (server->in_flight == 0 &&
+	   ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&
+	   ((optype & CIFS_OP_MASK) != CIFS_SESS_OP))
+		rc = change_conf(server);
+	/*
+	 * Sometimes server returns 0 credits on oplock break ack - we need to
+	 * rebalance credits in this case.
+	 */
+	else if (server->in_flight > 0 && server->oplock_credits == 0 &&
+		 server->oplocks) {
+		if (server->credits > 1) {
+			server->credits--;
+			server->oplock_credits++;
+		}
+	} else if ((server->in_flight > 0) && (server->oplock_credits > 3) &&
+		   ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP))
+		/* if now have too many oplock credits, rebalance so don't starve normal ops */
+		change_conf(server);
+
+	scredits = *val;
+	in_flight = server->in_flight;
+	spin_unlock(&server->req_lock);
+	wake_up(&server->request_q);
+
+	if (reconnect_detected) {
+		trace_smb3_reconnect_detected(server->CurrentMid,
+			server->conn_id, server->hostname, scredits, add, in_flight);
+
+		cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
+			 add, instance);
+	}
+
+	if (reconnect_with_invalid_credits) {
+		trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
+			server->conn_id, server->hostname, scredits, add, in_flight);
+		cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",
+			 optype, scredits, add);
+	}
+
+	spin_lock(&server->srv_lock);
+	if (server->tcpStatus == CifsNeedReconnect
+	    || server->tcpStatus == CifsExiting) {
+		spin_unlock(&server->srv_lock);
+		return;
+	}
+	spin_unlock(&server->srv_lock);
+
+	switch (rc) {
+	case -1:
+		/* change_conf hasn't been executed */
+		break;
+	case 0:
+		cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
+		break;
+	case 1:
+		cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
+		break;
+	case 2:
+		cifs_dbg(FYI, "disabling oplocks\n");
+		break;
+	default:
+		/* change_conf rebalanced credits for different types */
+		break;
+	}
+
+	trace_smb3_add_credits(server->CurrentMid,
+			server->conn_id, server->hostname, scredits, add, in_flight);
+	cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits);
+}
+
+static void
+smb2_set_credits(struct TCP_Server_Info *server, const int val)
+{
+	int scredits, in_flight;
+
+	spin_lock(&server->req_lock);
+	server->credits = val;
+	if (val == 1) {
+		server->reconnect_instance++;
+		/*
+		 * ChannelSequence updated for all channels in primary channel so that consistent
+		 * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1
+		 */
+		if (SERVER_IS_CHAN(server))
+			server->primary_server->channel_sequence_num++;
+		else
+			server->channel_sequence_num++;
+	}
+	scredits = server->credits;
+	in_flight = server->in_flight;
+	spin_unlock(&server->req_lock);
+
+	trace_smb3_set_credits(server->CurrentMid,
+			server->conn_id, server->hostname, scredits, val, in_flight);
+	cifs_dbg(FYI, "%s: set %u credits\n", __func__, val);
+
+	/* don't log while holding the lock */
+	if (val == 1)
+		cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
+}
+
+static int *
+smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
+{
+	switch (optype) {
+	case CIFS_ECHO_OP:
+		return &server->echo_credits;
+	case CIFS_OBREAK_OP:
+		return &server->oplock_credits;
+	default:
+		return &server->credits;
+	}
+}
+
+static unsigned int
+smb2_get_credits(struct mid_q_entry *mid)
+{
+	return mid->credits_received;
+}
+
+static int
+smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
+		      unsigned int *num, struct cifs_credits *credits)
+{
+	int rc = 0;
+	unsigned int scredits, in_flight;
+
+	spin_lock(&server->req_lock);
+	while (1) {
+		spin_unlock(&server->req_lock);
+
+		spin_lock(&server->srv_lock);
+		if (server->tcpStatus == CifsExiting) {
+			spin_unlock(&server->srv_lock);
+			return -ENOENT;
+		}
+		spin_unlock(&server->srv_lock);
+
+		spin_lock(&server->req_lock);
+		if (server->credits <= 0) {
+			spin_unlock(&server->req_lock);
+			cifs_num_waiters_inc(server);
+			rc = wait_event_killable(server->request_q,
+				has_credits(server, &server->credits, 1));
+			cifs_num_waiters_dec(server);
+			if (rc)
+				return rc;
+			spin_lock(&server->req_lock);
+		} else {
+			scredits = server->credits;
+			/* can deadlock with reopen */
+			if (scredits <= 8) {
+				*num = SMB2_MAX_BUFFER_SIZE;
+				credits->value = 0;
+				credits->instance = 0;
+				break;
+			}
+
+			/* leave some credits for reopen and other ops */
+			scredits -= 8;
+			*num = min_t(unsigned int, size,
+				     scredits * SMB2_MAX_BUFFER_SIZE);
+
+			credits->value =
+				DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
+			credits->instance = server->reconnect_instance;
+			server->credits -= credits->value;
+			server->in_flight++;
+			if (server->in_flight > server->max_in_flight)
+				server->max_in_flight = server->in_flight;
+			break;
+		}
+	}
+	scredits = server->credits;
+	in_flight = server->in_flight;
+	spin_unlock(&server->req_lock);
+
+	trace_smb3_wait_credits(server->CurrentMid,
+			server->conn_id, server->hostname, scredits, -(credits->value), in_flight);
+	cifs_dbg(FYI, "%s: removed %u credits total=%d\n",
+			__func__, credits->value, scredits);
+
+	return rc;
+}
+
+static int
+smb2_adjust_credits(struct TCP_Server_Info *server,
+		    struct cifs_credits *credits,
+		    const unsigned int payload_size)
+{
+	int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
+	int scredits, in_flight;
+
+	if (!credits->value || credits->value == new_val)
+		return 0;
+
+	if (credits->value < new_val) {
+		trace_smb3_too_many_credits(server->CurrentMid,
+				server->conn_id, server->hostname, 0, credits->value - new_val, 0);
+		cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
+				credits->value, new_val);
+
+		return -EOPNOTSUPP;
+	}
+
+	spin_lock(&server->req_lock);
+
+	if (server->reconnect_instance != credits->instance) {
+		scredits = server->credits;
+		in_flight = server->in_flight;
+		spin_unlock(&server->req_lock);
+
+		trace_smb3_reconnect_detected(server->CurrentMid,
+			server->conn_id, server->hostname, scredits,
+			credits->value - new_val, in_flight);
+		cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
+			 credits->value - new_val);
+		return -EAGAIN;
+	}
+
+	server->credits += credits->value - new_val;
+	scredits = server->credits;
+	in_flight = server->in_flight;
+	spin_unlock(&server->req_lock);
+	wake_up(&server->request_q);
+
+	trace_smb3_adj_credits(server->CurrentMid,
+			server->conn_id, server->hostname, scredits,
+			credits->value - new_val, in_flight);
+	cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n",
+			__func__, credits->value - new_val, scredits);
+
+	credits->value = new_val;
+
+	return 0;
+}
+
+static __u64
+smb2_get_next_mid(struct TCP_Server_Info *server)
+{
+	__u64 mid;
+	/* for SMB2 we need the current value */
+	spin_lock(&server->mid_lock);
+	mid = server->CurrentMid++;
+	spin_unlock(&server->mid_lock);
+	return mid;
+}
+
+static void
+smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
+{
+	spin_lock(&server->mid_lock);
+	if (server->CurrentMid >= val)
+		server->CurrentMid -= val;
+	spin_unlock(&server->mid_lock);
+}
+
+static struct mid_q_entry *
+__smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
+{
+	struct mid_q_entry *mid;
+	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
+	__u64 wire_mid = le64_to_cpu(shdr->MessageId);
+
+	if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
+		cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
+		return NULL;
+	}
+
+	spin_lock(&server->mid_lock);
+	list_for_each_entry(mid, &server->pending_mid_q, qhead) {
+		if ((mid->mid == wire_mid) &&
+		    (mid->mid_state == MID_REQUEST_SUBMITTED) &&
+		    (mid->command == shdr->Command)) {
+			kref_get(&mid->refcount);
+			if (dequeue) {
+				list_del_init(&mid->qhead);
+				mid->mid_flags |= MID_DELETED;
+			}
+			spin_unlock(&server->mid_lock);
+			return mid;
+		}
+	}
+	spin_unlock(&server->mid_lock);
+	return NULL;
+}
+
+static struct mid_q_entry *
+smb2_find_mid(struct TCP_Server_Info *server, char *buf)
+{
+	return __smb2_find_mid(server, buf, false);
+}
+
+static struct mid_q_entry *
+smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
+{
+	return __smb2_find_mid(server, buf, true);
+}
+
+static void
+smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
+{
+#ifdef CONFIG_CIFS_DEBUG2
+	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
+
+	cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
+		 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
+		 shdr->Id.SyncId.ProcessId);
+	if (!server->ops->check_message(buf, server->total_read, server)) {
+		cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
+				server->ops->calc_smb_size(buf));
+	}
+#endif
+}
+
+static bool
+smb2_need_neg(struct TCP_Server_Info *server)
+{
+	return server->max_read == 0;
+}
+
+static int
+smb2_negotiate(const unsigned int xid,
+	       struct cifs_ses *ses,
+	       struct TCP_Server_Info *server)
+{
+	int rc;
+
+	spin_lock(&server->mid_lock);
+	server->CurrentMid = 0;
+	spin_unlock(&server->mid_lock);
+	rc = SMB2_negotiate(xid, ses, server);
+	/* BB we probably don't need to retry with modern servers */
+	if (rc == -EAGAIN)
+		rc = -EHOSTDOWN;
+	return rc;
+}
+
+static unsigned int
+smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
+{
+	struct TCP_Server_Info *server = tcon->ses->server;
+	unsigned int wsize;
+
+	/* start with specified wsize, or default */
+	wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE;
+	wsize = min_t(unsigned int, wsize, server->max_write);
+	if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
+		wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
+
+	return wsize;
+}
+
+static unsigned int
+smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
+{
+	struct TCP_Server_Info *server = tcon->ses->server;
+	unsigned int wsize;
+
+	/* start with specified wsize, or default */
+	wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE;
+	wsize = min_t(unsigned int, wsize, server->max_write);
+#ifdef CONFIG_CIFS_SMB_DIRECT
+	if (server->rdma) {
+		if (server->sign)
+			/*
+			 * Account for SMB2 data transfer packet header and
+			 * possible encryption header
+			 */
+			wsize = min_t(unsigned int,
+				wsize,
+				server->smbd_conn->max_fragmented_send_size -
+					SMB2_READWRITE_PDU_HEADER_SIZE -
+					sizeof(struct smb2_transform_hdr));
+		else
+			wsize = min_t(unsigned int,
+				wsize, server->smbd_conn->max_readwrite_size);
+	}
+#endif
+	if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
+		wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
+
+	return wsize;
+}
+
+static unsigned int
+smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
+{
+	struct TCP_Server_Info *server = tcon->ses->server;
+	unsigned int rsize;
+
+	/* start with specified rsize, or default */
+	rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE;
+	rsize = min_t(unsigned int, rsize, server->max_read);
+
+	if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
+		rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
+
+	return rsize;
+}
+
+static unsigned int
+smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
+{
+	struct TCP_Server_Info *server = tcon->ses->server;
+	unsigned int rsize;
+
+	/* start with specified rsize, or default */
+	rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE;
+	rsize = min_t(unsigned int, rsize, server->max_read);
+#ifdef CONFIG_CIFS_SMB_DIRECT
+	if (server->rdma) {
+		if (server->sign)
+			/*
+			 * Account for SMB2 data transfer packet header and
+			 * possible encryption header
+			 */
+			rsize = min_t(unsigned int,
+				rsize,
+				server->smbd_conn->max_fragmented_recv_size -
+					SMB2_READWRITE_PDU_HEADER_SIZE -
+					sizeof(struct smb2_transform_hdr));
+		else
+			rsize = min_t(unsigned int,
+				rsize, server->smbd_conn->max_readwrite_size);
+	}
+#endif
+
+	if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
+		rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
+
+	return rsize;
+}
+
+/*
+ * compare two interfaces a and b
+ * return 0 if everything matches.
+ * return 1 if a is rdma capable, or rss capable, or has higher link speed
+ * return -1 otherwise.
+ */
+static int
+iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b)
+{
+	int cmp_ret = 0;
+
+	WARN_ON(!a || !b);
+	if (a->rdma_capable == b->rdma_capable) {
+		if (a->rss_capable == b->rss_capable) {
+			if (a->speed == b->speed) {
+				cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr,
+							  (struct sockaddr *) &b->sockaddr);
+				if (!cmp_ret)
+					return 0;
+				else if (cmp_ret > 0)
+					return 1;
+				else
+					return -1;
+			} else if (a->speed > b->speed)
+				return 1;
+			else
+				return -1;
+		} else if (a->rss_capable > b->rss_capable)
+			return 1;
+		else
+			return -1;
+	} else if (a->rdma_capable > b->rdma_capable)
+		return 1;
+	else
+		return -1;
+}
+
+static int
+parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
+			size_t buf_len, struct cifs_ses *ses, bool in_mount)
+{
+	struct network_interface_info_ioctl_rsp *p;
+	struct sockaddr_in *addr4;
+	struct sockaddr_in6 *addr6;
+	struct iface_info_ipv4 *p4;
+	struct iface_info_ipv6 *p6;
+	struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL;
+	struct cifs_server_iface tmp_iface;
+	ssize_t bytes_left;
+	size_t next = 0;
+	int nb_iface = 0;
+	int rc = 0, ret = 0;
+
+	bytes_left = buf_len;
+	p = buf;
+
+	spin_lock(&ses->iface_lock);
+	/* do not query too frequently, this time with lock held */
+	if (ses->iface_last_update &&
+	    time_before(jiffies, ses->iface_last_update +
+			(SMB_INTERFACE_POLL_INTERVAL * HZ))) {
+		spin_unlock(&ses->iface_lock);
+		return 0;
+	}
+
+	/*
+	 * Go through iface_list and mark them as inactive
+	 */
+	list_for_each_entry_safe(iface, niface, &ses->iface_list,
+				 iface_head)
+		iface->is_active = 0;
+
+	spin_unlock(&ses->iface_lock);
+
+	/*
+	 * Samba server e.g. can return an empty interface list in some cases,
+	 * which would only be a problem if we were requesting multichannel
+	 */
+	if (bytes_left == 0) {
+		/* avoid spamming logs every 10 minutes, so log only in mount */
+		if ((ses->chan_max > 1) && in_mount)
+			cifs_dbg(VFS,
+				 "multichannel not available\n"
+				 "Empty network interface list returned by server %s\n",
+				 ses->server->hostname);
+		rc = -EOPNOTSUPP;
+		ses->iface_last_update = jiffies;
+		goto out;
+	}
+
+	while (bytes_left >= sizeof(*p)) {
+		memset(&tmp_iface, 0, sizeof(tmp_iface));
+		tmp_iface.speed = le64_to_cpu(p->LinkSpeed);
+		tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
+		tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
+
+		switch (p->Family) {
+		/*
+		 * The kernel and wire socket structures have the same
+		 * layout and use network byte order but make the
+		 * conversion explicit in case either one changes.
+		 */
+		case INTERNETWORK:
+			addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr;
+			p4 = (struct iface_info_ipv4 *)p->Buffer;
+			addr4->sin_family = AF_INET;
+			memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
+
+			/* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
+			addr4->sin_port = cpu_to_be16(CIFS_PORT);
+
+			cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
+				 &addr4->sin_addr);
+			break;
+		case INTERNETWORKV6:
+			addr6 =	(struct sockaddr_in6 *)&tmp_iface.sockaddr;
+			p6 = (struct iface_info_ipv6 *)p->Buffer;
+			addr6->sin6_family = AF_INET6;
+			memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
+
+			/* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
+			addr6->sin6_flowinfo = 0;
+			addr6->sin6_scope_id = 0;
+			addr6->sin6_port = cpu_to_be16(CIFS_PORT);
+
+			cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
+				 &addr6->sin6_addr);
+			break;
+		default:
+			cifs_dbg(VFS,
+				 "%s: skipping unsupported socket family\n",
+				 __func__);
+			goto next_iface;
+		}
+
+		/*
+		 * The iface_list is assumed to be sorted by speed.
+		 * Check if the new interface exists in that list.
+		 * NEVER change iface. it could be in use.
+		 * Add a new one instead
+		 */
+		spin_lock(&ses->iface_lock);
+		list_for_each_entry_safe(iface, niface, &ses->iface_list,
+					 iface_head) {
+			ret = iface_cmp(iface, &tmp_iface);
+			if (!ret) {
+				iface->is_active = 1;
+				spin_unlock(&ses->iface_lock);
+				goto next_iface;
+			} else if (ret < 0) {
+				/* all remaining ifaces are slower */
+				kref_get(&iface->refcount);
+				break;
+			}
+		}
+		spin_unlock(&ses->iface_lock);
+
+		/* no match. insert the entry in the list */
+		info = kmalloc(sizeof(struct cifs_server_iface),
+			       GFP_KERNEL);
+		if (!info) {
+			rc = -ENOMEM;
+			goto out;
+		}
+		memcpy(info, &tmp_iface, sizeof(tmp_iface));
+
+		/* add this new entry to the list */
+		kref_init(&info->refcount);
+		info->is_active = 1;
+
+		cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count);
+		cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
+		cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
+			 le32_to_cpu(p->Capability));
+
+		spin_lock(&ses->iface_lock);
+		if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) {
+			list_add_tail(&info->iface_head, &iface->iface_head);
+			kref_put(&iface->refcount, release_iface);
+		} else
+			list_add_tail(&info->iface_head, &ses->iface_list);
+
+		ses->iface_count++;
+		spin_unlock(&ses->iface_lock);
+next_iface:
+		nb_iface++;
+		next = le32_to_cpu(p->Next);
+		if (!next) {
+			bytes_left -= sizeof(*p);
+			break;
+		}
+		p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
+		bytes_left -= next;
+	}
+
+	if (!nb_iface) {
+		cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
+		rc = -EINVAL;
+		goto out;
+	}
+
+	/* Azure rounds the buffer size up 8, to a 16 byte boundary */
+	if ((bytes_left > 8) || p->Next)
+		cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
+
+	ses->iface_last_update = jiffies;
+
+out:
+	/*
+	 * Go through the list again and put the inactive entries
+	 */
+	spin_lock(&ses->iface_lock);
+	list_for_each_entry_safe(iface, niface, &ses->iface_list,
+				 iface_head) {
+		if (!iface->is_active) {
+			list_del(&iface->iface_head);
+			kref_put(&iface->refcount, release_iface);
+			ses->iface_count--;
+		}
+	}
+	spin_unlock(&ses->iface_lock);
+
+	return rc;
+}
+
+int
+SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount)
+{
+	int rc;
+	unsigned int ret_data_len = 0;
+	struct network_interface_info_ioctl_rsp *out_buf = NULL;
+	struct cifs_ses *ses = tcon->ses;
+	struct TCP_Server_Info *pserver;
+
+	/* do not query too frequently */
+	if (ses->iface_last_update &&
+	    time_before(jiffies, ses->iface_last_update +
+			(SMB_INTERFACE_POLL_INTERVAL * HZ)))
+		return 0;
+
+	rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
+			FSCTL_QUERY_NETWORK_INTERFACE_INFO,
+			NULL /* no data input */, 0 /* no data input */,
+			CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
+	if (rc == -EOPNOTSUPP) {
+		cifs_dbg(FYI,
+			 "server does not support query network interfaces\n");
+		ret_data_len = 0;
+	} else if (rc != 0) {
+		cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
+		goto out;
+	}
+
+	rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount);
+	if (rc)
+		goto out;
+
+	/* check if iface is still active */
+	spin_lock(&ses->chan_lock);
+	pserver = ses->chans[0].server;
+	if (pserver && !cifs_chan_is_iface_active(ses, pserver)) {
+		spin_unlock(&ses->chan_lock);
+		cifs_chan_update_iface(ses, pserver);
+		spin_lock(&ses->chan_lock);
+	}
+	spin_unlock(&ses->chan_lock);
+
+out:
+	kfree(out_buf);
+	return rc;
+}
+
+static void
+smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
+	      struct cifs_sb_info *cifs_sb)
+{
+	int rc;
+	__le16 srch_path = 0; /* Null - open root of share */
+	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
+	struct cifs_open_parms oparms;
+	struct cifs_fid fid;
+	struct cached_fid *cfid = NULL;
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.path = "",
+		.desired_access = FILE_READ_ATTRIBUTES,
+		.disposition = FILE_OPEN,
+		.create_options = cifs_create_options(cifs_sb, 0),
+		.fid = &fid,
+	};
+
+	rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid);
+	if (rc == 0)
+		memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid));
+	else
+		rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
+			       NULL, NULL);
+	if (rc)
+		return;
+
+	SMB3_request_interfaces(xid, tcon, true /* called during  mount */);
+
+	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
+			FS_ATTRIBUTE_INFORMATION);
+	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
+			FS_DEVICE_INFORMATION);
+	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
+			FS_VOLUME_INFORMATION);
+	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
+			FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
+	if (cfid == NULL)
+		SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
+	else
+		close_cached_dir(cfid);
+}
+
+static void
+smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
+	      struct cifs_sb_info *cifs_sb)
+{
+	int rc;
+	__le16 srch_path = 0; /* Null - open root of share */
+	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
+	struct cifs_open_parms oparms;
+	struct cifs_fid fid;
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.path = "",
+		.desired_access = FILE_READ_ATTRIBUTES,
+		.disposition = FILE_OPEN,
+		.create_options = cifs_create_options(cifs_sb, 0),
+		.fid = &fid,
+	};
+
+	rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
+		       NULL, NULL);
+	if (rc)
+		return;
+
+	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
+			FS_ATTRIBUTE_INFORMATION);
+	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
+			FS_DEVICE_INFORMATION);
+	SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
+}
+
+static int
+smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
+			struct cifs_sb_info *cifs_sb, const char *full_path)
+{
+	__le16 *utf16_path;
+	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
+	int err_buftype = CIFS_NO_BUFFER;
+	struct cifs_open_parms oparms;
+	struct kvec err_iov = {};
+	struct cifs_fid fid;
+	struct cached_fid *cfid;
+	bool islink;
+	int rc, rc2;
+
+	rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid);
+	if (!rc) {
+		if (cfid->has_lease) {
+			close_cached_dir(cfid);
+			return 0;
+		}
+		close_cached_dir(cfid);
+	}
+
+	utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
+	if (!utf16_path)
+		return -ENOMEM;
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.path = full_path,
+		.desired_access = FILE_READ_ATTRIBUTES,
+		.disposition = FILE_OPEN,
+		.create_options = cifs_create_options(cifs_sb, 0),
+		.fid = &fid,
+	};
+
+	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
+		       &err_iov, &err_buftype);
+	if (rc) {
+		struct smb2_hdr *hdr = err_iov.iov_base;
+
+		if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER))
+			goto out;
+
+		if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) {
+			rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
+							     full_path, &islink);
+			if (rc2) {
+				rc = rc2;
+				goto out;
+			}
+			if (islink)
+				rc = -EREMOTE;
+		}
+		if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&
+		    (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))
+			rc = -EOPNOTSUPP;
+		goto out;
+	}
+
+	rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
+
+out:
+	free_rsp_buf(err_buftype, err_iov.iov_base);
+	kfree(utf16_path);
+	return rc;
+}
+
+static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
+			     struct cifs_sb_info *cifs_sb, const char *full_path,
+			     u64 *uniqueid, struct cifs_open_info_data *data)
+{
+	*uniqueid = le64_to_cpu(data->fi.IndexNumber);
+	return 0;
+}
+
+static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
+				struct cifsFileInfo *cfile, struct cifs_open_info_data *data)
+{
+	struct cifs_fid *fid = &cfile->fid;
+
+	if (cfile->symlink_target) {
+		data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
+		if (!data->symlink_target)
+			return -ENOMEM;
+	}
+	return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi);
+}
+
+#ifdef CONFIG_CIFS_XATTR
+static ssize_t
+move_smb2_ea_to_cifs(char *dst, size_t dst_size,
+		     struct smb2_file_full_ea_info *src, size_t src_size,
+		     const unsigned char *ea_name)
+{
+	int rc = 0;
+	unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
+	char *name, *value;
+	size_t buf_size = dst_size;
+	size_t name_len, value_len, user_name_len;
+
+	while (src_size > 0) {
+		name_len = (size_t)src->ea_name_length;
+		value_len = (size_t)le16_to_cpu(src->ea_value_length);
+
+		if (name_len == 0)
+			break;
+
+		if (src_size < 8 + name_len + 1 + value_len) {
+			cifs_dbg(FYI, "EA entry goes beyond length of list\n");
+			rc = -EIO;
+			goto out;
+		}
+
+		name = &src->ea_data[0];
+		value = &src->ea_data[src->ea_name_length + 1];
+
+		if (ea_name) {
+			if (ea_name_len == name_len &&
+			    memcmp(ea_name, name, name_len) == 0) {
+				rc = value_len;
+				if (dst_size == 0)
+					goto out;
+				if (dst_size < value_len) {
+					rc = -ERANGE;
+					goto out;
+				}
+				memcpy(dst, value, value_len);
+				goto out;
+			}
+		} else {
+			/* 'user.' plus a terminating null */
+			user_name_len = 5 + 1 + name_len;
+
+			if (buf_size == 0) {
+				/* skip copy - calc size only */
+				rc += user_name_len;
+			} else if (dst_size >= user_name_len) {
+				dst_size -= user_name_len;
+				memcpy(dst, "user.", 5);
+				dst += 5;
+				memcpy(dst, src->ea_data, name_len);
+				dst += name_len;
+				*dst = 0;
+				++dst;
+				rc += user_name_len;
+			} else {
+				/* stop before overrun buffer */
+				rc = -ERANGE;
+				break;
+			}
+		}
+
+		if (!src->next_entry_offset)
+			break;
+
+		if (src_size < le32_to_cpu(src->next_entry_offset)) {
+			/* stop before overrun buffer */
+			rc = -ERANGE;
+			break;
+		}
+		src_size -= le32_to_cpu(src->next_entry_offset);
+		src = (void *)((char *)src +
+			       le32_to_cpu(src->next_entry_offset));
+	}
+
+	/* didn't find the named attribute */
+	if (ea_name)
+		rc = -ENODATA;
+
+out:
+	return (ssize_t)rc;
+}
+
+static ssize_t
+smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
+	       const unsigned char *path, const unsigned char *ea_name,
+	       char *ea_data, size_t buf_size,
+	       struct cifs_sb_info *cifs_sb)
+{
+	int rc;
+	struct kvec rsp_iov = {NULL, 0};
+	int buftype = CIFS_NO_BUFFER;
+	struct smb2_query_info_rsp *rsp;
+	struct smb2_file_full_ea_info *info = NULL;
+
+	rc = smb2_query_info_compound(xid, tcon, path,
+				      FILE_READ_EA,
+				      FILE_FULL_EA_INFORMATION,
+				      SMB2_O_INFO_FILE,
+				      CIFSMaxBufSize -
+				      MAX_SMB2_CREATE_RESPONSE_SIZE -
+				      MAX_SMB2_CLOSE_RESPONSE_SIZE,
+				      &rsp_iov, &buftype, cifs_sb);
+	if (rc) {
+		/*
+		 * If ea_name is NULL (listxattr) and there are no EAs,
+		 * return 0 as it's not an error. Otherwise, the specified
+		 * ea_name was not found.
+		 */
+		if (!ea_name && rc == -ENODATA)
+			rc = 0;
+		goto qeas_exit;
+	}
+
+	rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
+	rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
+			       le32_to_cpu(rsp->OutputBufferLength),
+			       &rsp_iov,
+			       sizeof(struct smb2_file_full_ea_info));
+	if (rc)
+		goto qeas_exit;
+
+	info = (struct smb2_file_full_ea_info *)(
+			le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
+	rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
+			le32_to_cpu(rsp->OutputBufferLength), ea_name);
+
+ qeas_exit:
+	free_rsp_buf(buftype, rsp_iov.iov_base);
+	return rc;
+}
+
+static int
+smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
+	    const char *path, const char *ea_name, const void *ea_value,
+	    const __u16 ea_value_len, const struct nls_table *nls_codepage,
+	    struct cifs_sb_info *cifs_sb)
+{
+	struct smb2_compound_vars *vars;
+	struct cifs_ses *ses = tcon->ses;
+	struct TCP_Server_Info *server = cifs_pick_channel(ses);
+	struct smb_rqst *rqst;
+	struct kvec *rsp_iov;
+	__le16 *utf16_path = NULL;
+	int ea_name_len = strlen(ea_name);
+	int flags = CIFS_CP_CREATE_CLOSE_OP;
+	int len;
+	int resp_buftype[3];
+	struct cifs_open_parms oparms;
+	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
+	struct cifs_fid fid;
+	unsigned int size[1];
+	void *data[1];
+	struct smb2_file_full_ea_info *ea = NULL;
+	struct smb2_query_info_rsp *rsp;
+	int rc, used_len = 0;
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	if (ea_name_len > 255)
+		return -EINVAL;
+
+	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
+	if (!utf16_path)
+		return -ENOMEM;
+
+	resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
+	vars = kzalloc(sizeof(*vars), GFP_KERNEL);
+	if (!vars) {
+		rc = -ENOMEM;
+		goto out_free_path;
+	}
+	rqst = vars->rqst;
+	rsp_iov = vars->rsp_iov;
+
+	if (ses->server->ops->query_all_EAs) {
+		if (!ea_value) {
+			rc = ses->server->ops->query_all_EAs(xid, tcon, path,
+							     ea_name, NULL, 0,
+							     cifs_sb);
+			if (rc == -ENODATA)
+				goto sea_exit;
+		} else {
+			/* If we are adding a attribute we should first check
+			 * if there will be enough space available to store
+			 * the new EA. If not we should not add it since we
+			 * would not be able to even read the EAs back.
+			 */
+			rc = smb2_query_info_compound(xid, tcon, path,
+				      FILE_READ_EA,
+				      FILE_FULL_EA_INFORMATION,
+				      SMB2_O_INFO_FILE,
+				      CIFSMaxBufSize -
+				      MAX_SMB2_CREATE_RESPONSE_SIZE -
+				      MAX_SMB2_CLOSE_RESPONSE_SIZE,
+				      &rsp_iov[1], &resp_buftype[1], cifs_sb);
+			if (rc == 0) {
+				rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
+				used_len = le32_to_cpu(rsp->OutputBufferLength);
+			}
+			free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
+			resp_buftype[1] = CIFS_NO_BUFFER;
+			memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
+			rc = 0;
+
+			/* Use a fudge factor of 256 bytes in case we collide
+			 * with a different set_EAs command.
+			 */
+			if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
+			   MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
+			   used_len + ea_name_len + ea_value_len + 1) {
+				rc = -ENOSPC;
+				goto sea_exit;
+			}
+		}
+	}
+
+	/* Open */
+	rqst[0].rq_iov = vars->open_iov;
+	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.path = path,
+		.desired_access = FILE_WRITE_EA,
+		.disposition = FILE_OPEN,
+		.create_options = cifs_create_options(cifs_sb, 0),
+		.fid = &fid,
+	};
+
+	rc = SMB2_open_init(tcon, server,
+			    &rqst[0], &oplock, &oparms, utf16_path);
+	if (rc)
+		goto sea_exit;
+	smb2_set_next_command(tcon, &rqst[0]);
+
+
+	/* Set Info */
+	rqst[1].rq_iov = vars->si_iov;
+	rqst[1].rq_nvec = 1;
+
+	len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
+	ea = kzalloc(len, GFP_KERNEL);
+	if (ea == NULL) {
+		rc = -ENOMEM;
+		goto sea_exit;
+	}
+
+	ea->ea_name_length = ea_name_len;
+	ea->ea_value_length = cpu_to_le16(ea_value_len);
+	memcpy(ea->ea_data, ea_name, ea_name_len + 1);
+	memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
+
+	size[0] = len;
+	data[0] = ea;
+
+	rc = SMB2_set_info_init(tcon, server,
+				&rqst[1], COMPOUND_FID,
+				COMPOUND_FID, current->tgid,
+				FILE_FULL_EA_INFORMATION,
+				SMB2_O_INFO_FILE, 0, data, size);
+	if (rc)
+		goto sea_exit;
+	smb2_set_next_command(tcon, &rqst[1]);
+	smb2_set_related(&rqst[1]);
+
+	/* Close */
+	rqst[2].rq_iov = &vars->close_iov;
+	rqst[2].rq_nvec = 1;
+	rc = SMB2_close_init(tcon, server,
+			     &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
+	if (rc)
+		goto sea_exit;
+	smb2_set_related(&rqst[2]);
+
+	rc = compound_send_recv(xid, ses, server,
+				flags, 3, rqst,
+				resp_buftype, rsp_iov);
+	/* no need to bump num_remote_opens because handle immediately closed */
+
+ sea_exit:
+	kfree(ea);
+	SMB2_open_free(&rqst[0]);
+	SMB2_set_info_free(&rqst[1]);
+	SMB2_close_free(&rqst[2]);
+	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
+	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
+	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
+	kfree(vars);
+out_free_path:
+	kfree(utf16_path);
+	return rc;
+}
+#endif
+
+static bool
+smb2_can_echo(struct TCP_Server_Info *server)
+{
+	return server->echoes;
+}
+
+static void
+smb2_clear_stats(struct cifs_tcon *tcon)
+{
+	int i;
+
+	for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
+		atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
+		atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
+	}
+}
+
+static void
+smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
+{
+	seq_puts(m, "\n\tShare Capabilities:");
+	if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
+		seq_puts(m, " DFS,");
+	if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
+		seq_puts(m, " CONTINUOUS AVAILABILITY,");
+	if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
+		seq_puts(m, " SCALEOUT,");
+	if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
+		seq_puts(m, " CLUSTER,");
+	if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
+		seq_puts(m, " ASYMMETRIC,");
+	if (tcon->capabilities == 0)
+		seq_puts(m, " None");
+	if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
+		seq_puts(m, " Aligned,");
+	if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
+		seq_puts(m, " Partition Aligned,");
+	if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
+		seq_puts(m, " SSD,");
+	if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
+		seq_puts(m, " TRIM-support,");
+
+	seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
+	seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
+	if (tcon->perf_sector_size)
+		seq_printf(m, "\tOptimal sector size: 0x%x",
+			   tcon->perf_sector_size);
+	seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
+}
+
+static void
+smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
+{
+	atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
+	atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
+
+	/*
+	 *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
+	 *  totals (requests sent) since those SMBs are per-session not per tcon
+	 */
+	seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
+		   (long long)(tcon->bytes_read),
+		   (long long)(tcon->bytes_written));
+	seq_printf(m, "\nOpen files: %d total (local), %d open on server",
+		   atomic_read(&tcon->num_local_opens),
+		   atomic_read(&tcon->num_remote_opens));
+	seq_printf(m, "\nTreeConnects: %d total %d failed",
+		   atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
+		   atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
+	seq_printf(m, "\nTreeDisconnects: %d total %d failed",
+		   atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
+		   atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
+	seq_printf(m, "\nCreates: %d total %d failed",
+		   atomic_read(&sent[SMB2_CREATE_HE]),
+		   atomic_read(&failed[SMB2_CREATE_HE]));
+	seq_printf(m, "\nCloses: %d total %d failed",
+		   atomic_read(&sent[SMB2_CLOSE_HE]),
+		   atomic_read(&failed[SMB2_CLOSE_HE]));
+	seq_printf(m, "\nFlushes: %d total %d failed",
+		   atomic_read(&sent[SMB2_FLUSH_HE]),
+		   atomic_read(&failed[SMB2_FLUSH_HE]));
+	seq_printf(m, "\nReads: %d total %d failed",
+		   atomic_read(&sent[SMB2_READ_HE]),
+		   atomic_read(&failed[SMB2_READ_HE]));
+	seq_printf(m, "\nWrites: %d total %d failed",
+		   atomic_read(&sent[SMB2_WRITE_HE]),
+		   atomic_read(&failed[SMB2_WRITE_HE]));
+	seq_printf(m, "\nLocks: %d total %d failed",
+		   atomic_read(&sent[SMB2_LOCK_HE]),
+		   atomic_read(&failed[SMB2_LOCK_HE]));
+	seq_printf(m, "\nIOCTLs: %d total %d failed",
+		   atomic_read(&sent[SMB2_IOCTL_HE]),
+		   atomic_read(&failed[SMB2_IOCTL_HE]));
+	seq_printf(m, "\nQueryDirectories: %d total %d failed",
+		   atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
+		   atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
+	seq_printf(m, "\nChangeNotifies: %d total %d failed",
+		   atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
+		   atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
+	seq_printf(m, "\nQueryInfos: %d total %d failed",
+		   atomic_read(&sent[SMB2_QUERY_INFO_HE]),
+		   atomic_read(&failed[SMB2_QUERY_INFO_HE]));
+	seq_printf(m, "\nSetInfos: %d total %d failed",
+		   atomic_read(&sent[SMB2_SET_INFO_HE]),
+		   atomic_read(&failed[SMB2_SET_INFO_HE]));
+	seq_printf(m, "\nOplockBreaks: %d sent %d failed",
+		   atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
+		   atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
+}
+
+static void
+smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
+{
+	struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
+	struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
+
+	cfile->fid.persistent_fid = fid->persistent_fid;
+	cfile->fid.volatile_fid = fid->volatile_fid;
+	cfile->fid.access = fid->access;
+#ifdef CONFIG_CIFS_DEBUG2
+	cfile->fid.mid = fid->mid;
+#endif /* CIFS_DEBUG2 */
+	server->ops->set_oplock_level(cinode, oplock, fid->epoch,
+				      &fid->purge_cache);
+	cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
+	memcpy(cfile->fid.create_guid, fid->create_guid, 16);
+}
+
+static void
+smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
+		struct cifs_fid *fid)
+{
+	SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
+}
+
+static void
+smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
+		   struct cifsFileInfo *cfile)
+{
+	struct smb2_file_network_open_info file_inf;
+	struct inode *inode;
+	int rc;
+
+	rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
+		   cfile->fid.volatile_fid, &file_inf);
+	if (rc)
+		return;
+
+	inode = d_inode(cfile->dentry);
+
+	spin_lock(&inode->i_lock);
+	CIFS_I(inode)->time = jiffies;
+
+	/* Creation time should not need to be updated on close */
+	if (file_inf.LastWriteTime)
+		inode_set_mtime_to_ts(inode,
+				      cifs_NTtimeToUnix(file_inf.LastWriteTime));
+	if (file_inf.ChangeTime)
+		inode_set_ctime_to_ts(inode,
+				      cifs_NTtimeToUnix(file_inf.ChangeTime));
+	if (file_inf.LastAccessTime)
+		inode_set_atime_to_ts(inode,
+				      cifs_NTtimeToUnix(file_inf.LastAccessTime));
+
+	/*
+	 * i_blocks is not related to (i_size / i_blksize),
+	 * but instead 512 byte (2**9) size is required for
+	 * calculating num blocks.
+	 */
+	if (le64_to_cpu(file_inf.AllocationSize) > 4096)
+		inode->i_blocks =
+			(512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
+
+	/* End of file and Attributes should not have to be updated on close */
+	spin_unlock(&inode->i_lock);
+}
+
+static int
+SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
+		     u64 persistent_fid, u64 volatile_fid,
+		     struct copychunk_ioctl *pcchunk)
+{
+	int rc;
+	unsigned int ret_data_len;
+	struct resume_key_req *res_key;
+
+	rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
+			FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
+			CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
+
+	if (rc == -EOPNOTSUPP) {
+		pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name);
+		goto req_res_key_exit;
+	} else if (rc) {
+		cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
+		goto req_res_key_exit;
+	}
+	if (ret_data_len < sizeof(struct resume_key_req)) {
+		cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
+		rc = -EINVAL;
+		goto req_res_key_exit;
+	}
+	memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
+
+req_res_key_exit:
+	kfree(res_key);
+	return rc;
+}
+
+static int
+smb2_ioctl_query_info(const unsigned int xid,
+		      struct cifs_tcon *tcon,
+		      struct cifs_sb_info *cifs_sb,
+		      __le16 *path, int is_dir,
+		      unsigned long p)
+{
+	struct smb2_compound_vars *vars;
+	struct smb_rqst *rqst;
+	struct kvec *rsp_iov;
+	struct cifs_ses *ses = tcon->ses;
+	struct TCP_Server_Info *server = cifs_pick_channel(ses);
+	char __user *arg = (char __user *)p;
+	struct smb_query_info qi;
+	struct smb_query_info __user *pqi;
+	int rc = 0;
+	int flags = CIFS_CP_CREATE_CLOSE_OP;
+	struct smb2_query_info_rsp *qi_rsp = NULL;
+	struct smb2_ioctl_rsp *io_rsp = NULL;
+	void *buffer = NULL;
+	int resp_buftype[3];
+	struct cifs_open_parms oparms;
+	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
+	struct cifs_fid fid;
+	unsigned int size[2];
+	void *data[2];
+	int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
+	void (*free_req1_func)(struct smb_rqst *r);
+
+	vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
+	if (vars == NULL)
+		return -ENOMEM;
+	rqst = &vars->rqst[0];
+	rsp_iov = &vars->rsp_iov[0];
+
+	resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
+
+	if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
+		rc = -EFAULT;
+		goto free_vars;
+	}
+	if (qi.output_buffer_length > 1024) {
+		rc = -EINVAL;
+		goto free_vars;
+	}
+
+	if (!ses || !server) {
+		rc = -EIO;
+		goto free_vars;
+	}
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	if (qi.output_buffer_length) {
+		buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
+		if (IS_ERR(buffer)) {
+			rc = PTR_ERR(buffer);
+			goto free_vars;
+		}
+	}
+
+	/* Open */
+	rqst[0].rq_iov = &vars->open_iov[0];
+	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.disposition = FILE_OPEN,
+		.create_options = cifs_create_options(cifs_sb, create_options),
+		.fid = &fid,
+	};
+
+	if (qi.flags & PASSTHRU_FSCTL) {
+		switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
+		case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
+			oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
+			break;
+		case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
+			oparms.desired_access = GENERIC_ALL;
+			break;
+		case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
+			oparms.desired_access = GENERIC_READ;
+			break;
+		case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
+			oparms.desired_access = GENERIC_WRITE;
+			break;
+		}
+	} else if (qi.flags & PASSTHRU_SET_INFO) {
+		oparms.desired_access = GENERIC_WRITE;
+	} else {
+		oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
+	}
+
+	rc = SMB2_open_init(tcon, server,
+			    &rqst[0], &oplock, &oparms, path);
+	if (rc)
+		goto free_output_buffer;
+	smb2_set_next_command(tcon, &rqst[0]);
+
+	/* Query */
+	if (qi.flags & PASSTHRU_FSCTL) {
+		/* Can eventually relax perm check since server enforces too */
+		if (!capable(CAP_SYS_ADMIN)) {
+			rc = -EPERM;
+			goto free_open_req;
+		}
+		rqst[1].rq_iov = &vars->io_iov[0];
+		rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
+
+		rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
+				     qi.info_type, buffer, qi.output_buffer_length,
+				     CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
+				     MAX_SMB2_CLOSE_RESPONSE_SIZE);
+		free_req1_func = SMB2_ioctl_free;
+	} else if (qi.flags == PASSTHRU_SET_INFO) {
+		/* Can eventually relax perm check since server enforces too */
+		if (!capable(CAP_SYS_ADMIN)) {
+			rc = -EPERM;
+			goto free_open_req;
+		}
+		if (qi.output_buffer_length < 8) {
+			rc = -EINVAL;
+			goto free_open_req;
+		}
+		rqst[1].rq_iov = vars->si_iov;
+		rqst[1].rq_nvec = 1;
+
+		/* MS-FSCC 2.4.13 FileEndOfFileInformation */
+		size[0] = 8;
+		data[0] = buffer;
+
+		rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
+					current->tgid, FILE_END_OF_FILE_INFORMATION,
+					SMB2_O_INFO_FILE, 0, data, size);
+		free_req1_func = SMB2_set_info_free;
+	} else if (qi.flags == PASSTHRU_QUERY_INFO) {
+		rqst[1].rq_iov = &vars->qi_iov;
+		rqst[1].rq_nvec = 1;
+
+		rc = SMB2_query_info_init(tcon, server,
+				  &rqst[1], COMPOUND_FID,
+				  COMPOUND_FID, qi.file_info_class,
+				  qi.info_type, qi.additional_information,
+				  qi.input_buffer_length,
+				  qi.output_buffer_length, buffer);
+		free_req1_func = SMB2_query_info_free;
+	} else { /* unknown flags */
+		cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
+			      qi.flags);
+		rc = -EINVAL;
+	}
+
+	if (rc)
+		goto free_open_req;
+	smb2_set_next_command(tcon, &rqst[1]);
+	smb2_set_related(&rqst[1]);
+
+	/* Close */
+	rqst[2].rq_iov = &vars->close_iov;
+	rqst[2].rq_nvec = 1;
+
+	rc = SMB2_close_init(tcon, server,
+			     &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
+	if (rc)
+		goto free_req_1;
+	smb2_set_related(&rqst[2]);
+
+	rc = compound_send_recv(xid, ses, server,
+				flags, 3, rqst,
+				resp_buftype, rsp_iov);
+	if (rc)
+		goto out;
+
+	/* No need to bump num_remote_opens since handle immediately closed */
+	if (qi.flags & PASSTHRU_FSCTL) {
+		pqi = (struct smb_query_info __user *)arg;
+		io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
+		if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
+			qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
+		if (qi.input_buffer_length > 0 &&
+		    le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
+		    > rsp_iov[1].iov_len) {
+			rc = -EFAULT;
+			goto out;
+		}
+
+		if (copy_to_user(&pqi->input_buffer_length,
+				 &qi.input_buffer_length,
+				 sizeof(qi.input_buffer_length))) {
+			rc = -EFAULT;
+			goto out;
+		}
+
+		if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
+				 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
+				 qi.input_buffer_length))
+			rc = -EFAULT;
+	} else {
+		pqi = (struct smb_query_info __user *)arg;
+		qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
+		if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
+			qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
+		if (copy_to_user(&pqi->input_buffer_length,
+				 &qi.input_buffer_length,
+				 sizeof(qi.input_buffer_length))) {
+			rc = -EFAULT;
+			goto out;
+		}
+
+		if (copy_to_user(pqi + 1, qi_rsp->Buffer,
+				 qi.input_buffer_length))
+			rc = -EFAULT;
+	}
+
+out:
+	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
+	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
+	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
+	SMB2_close_free(&rqst[2]);
+free_req_1:
+	free_req1_func(&rqst[1]);
+free_open_req:
+	SMB2_open_free(&rqst[0]);
+free_output_buffer:
+	kfree(buffer);
+free_vars:
+	kfree(vars);
+	return rc;
+}
+
+static ssize_t
+smb2_copychunk_range(const unsigned int xid,
+			struct cifsFileInfo *srcfile,
+			struct cifsFileInfo *trgtfile, u64 src_off,
+			u64 len, u64 dest_off)
+{
+	int rc;
+	unsigned int ret_data_len;
+	struct copychunk_ioctl *pcchunk;
+	struct copychunk_ioctl_rsp *retbuf = NULL;
+	struct cifs_tcon *tcon;
+	int chunks_copied = 0;
+	bool chunk_sizes_updated = false;
+	ssize_t bytes_written, total_bytes_written = 0;
+
+	pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
+	if (pcchunk == NULL)
+		return -ENOMEM;
+
+	cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
+	/* Request a key from the server to identify the source of the copy */
+	rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
+				srcfile->fid.persistent_fid,
+				srcfile->fid.volatile_fid, pcchunk);
+
+	/* Note: request_res_key sets res_key null only if rc !=0 */
+	if (rc)
+		goto cchunk_out;
+
+	/* For now array only one chunk long, will make more flexible later */
+	pcchunk->ChunkCount = cpu_to_le32(1);
+	pcchunk->Reserved = 0;
+	pcchunk->Reserved2 = 0;
+
+	tcon = tlink_tcon(trgtfile->tlink);
+
+	while (len > 0) {
+		pcchunk->SourceOffset = cpu_to_le64(src_off);
+		pcchunk->TargetOffset = cpu_to_le64(dest_off);
+		pcchunk->Length =
+			cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk));
+
+		/* Request server copy to target from src identified by key */
+		kfree(retbuf);
+		retbuf = NULL;
+		rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
+			trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
+			(char *)pcchunk, sizeof(struct copychunk_ioctl),
+			CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
+		if (rc == 0) {
+			if (ret_data_len !=
+					sizeof(struct copychunk_ioctl_rsp)) {
+				cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
+				rc = -EIO;
+				goto cchunk_out;
+			}
+			if (retbuf->TotalBytesWritten == 0) {
+				cifs_dbg(FYI, "no bytes copied\n");
+				rc = -EIO;
+				goto cchunk_out;
+			}
+			/*
+			 * Check if server claimed to write more than we asked
+			 */
+			if (le32_to_cpu(retbuf->TotalBytesWritten) >
+			    le32_to_cpu(pcchunk->Length)) {
+				cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
+				rc = -EIO;
+				goto cchunk_out;
+			}
+			if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
+				cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
+				rc = -EIO;
+				goto cchunk_out;
+			}
+			chunks_copied++;
+
+			bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
+			src_off += bytes_written;
+			dest_off += bytes_written;
+			len -= bytes_written;
+			total_bytes_written += bytes_written;
+
+			cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
+				le32_to_cpu(retbuf->ChunksWritten),
+				le32_to_cpu(retbuf->ChunkBytesWritten),
+				bytes_written);
+		} else if (rc == -EINVAL) {
+			if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
+				goto cchunk_out;
+
+			cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
+				le32_to_cpu(retbuf->ChunksWritten),
+				le32_to_cpu(retbuf->ChunkBytesWritten),
+				le32_to_cpu(retbuf->TotalBytesWritten));
+
+			/*
+			 * Check if this is the first request using these sizes,
+			 * (ie check if copy succeed once with original sizes
+			 * and check if the server gave us different sizes after
+			 * we already updated max sizes on previous request).
+			 * if not then why is the server returning an error now
+			 */
+			if ((chunks_copied != 0) || chunk_sizes_updated)
+				goto cchunk_out;
+
+			/* Check that server is not asking us to grow size */
+			if (le32_to_cpu(retbuf->ChunkBytesWritten) <
+					tcon->max_bytes_chunk)
+				tcon->max_bytes_chunk =
+					le32_to_cpu(retbuf->ChunkBytesWritten);
+			else
+				goto cchunk_out; /* server gave us bogus size */
+
+			/* No need to change MaxChunks since already set to 1 */
+			chunk_sizes_updated = true;
+		} else
+			goto cchunk_out;
+	}
+
+cchunk_out:
+	kfree(pcchunk);
+	kfree(retbuf);
+	if (rc)
+		return rc;
+	else
+		return total_bytes_written;
+}
+
+static int
+smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
+		struct cifs_fid *fid)
+{
+	return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
+}
+
+static unsigned int
+smb2_read_data_offset(char *buf)
+{
+	struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
+
+	return rsp->DataOffset;
+}
+
+static unsigned int
+smb2_read_data_length(char *buf, bool in_remaining)
+{
+	struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
+
+	if (in_remaining)
+		return le32_to_cpu(rsp->DataRemaining);
+
+	return le32_to_cpu(rsp->DataLength);
+}
+
+
+static int
+smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
+	       struct cifs_io_parms *parms, unsigned int *bytes_read,
+	       char **buf, int *buf_type)
+{
+	parms->persistent_fid = pfid->persistent_fid;
+	parms->volatile_fid = pfid->volatile_fid;
+	return SMB2_read(xid, parms, bytes_read, buf, buf_type);
+}
+
+static int
+smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
+		struct cifs_io_parms *parms, unsigned int *written,
+		struct kvec *iov, unsigned long nr_segs)
+{
+
+	parms->persistent_fid = pfid->persistent_fid;
+	parms->volatile_fid = pfid->volatile_fid;
+	return SMB2_write(xid, parms, written, iov, nr_segs);
+}
+
+/* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
+static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
+		struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
+{
+	struct cifsInodeInfo *cifsi;
+	int rc;
+
+	cifsi = CIFS_I(inode);
+
+	/* if file already sparse don't bother setting sparse again */
+	if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
+		return true; /* already sparse */
+
+	if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
+		return true; /* already not sparse */
+
+	/*
+	 * Can't check for sparse support on share the usual way via the
+	 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
+	 * since Samba server doesn't set the flag on the share, yet
+	 * supports the set sparse FSCTL and returns sparse correctly
+	 * in the file attributes. If we fail setting sparse though we
+	 * mark that server does not support sparse files for this share
+	 * to avoid repeatedly sending the unsupported fsctl to server
+	 * if the file is repeatedly extended.
+	 */
+	if (tcon->broken_sparse_sup)
+		return false;
+
+	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
+			cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
+			&setsparse, 1, CIFSMaxBufSize, NULL, NULL);
+	if (rc) {
+		tcon->broken_sparse_sup = true;
+		cifs_dbg(FYI, "set sparse rc = %d\n", rc);
+		return false;
+	}
+
+	if (setsparse)
+		cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
+	else
+		cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
+
+	return true;
+}
+
+static int
+smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
+		   struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
+{
+	__le64 eof = cpu_to_le64(size);
+	struct inode *inode;
+
+	/*
+	 * If extending file more than one page make sparse. Many Linux fs
+	 * make files sparse by default when extending via ftruncate
+	 */
+	inode = d_inode(cfile->dentry);
+
+	if (!set_alloc && (size > inode->i_size + 8192)) {
+		__u8 set_sparse = 1;
+
+		/* whether set sparse succeeds or not, extend the file */
+		smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
+	}
+
+	return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
+			    cfile->fid.volatile_fid, cfile->pid, &eof);
+}
+
+static int
+smb2_duplicate_extents(const unsigned int xid,
+			struct cifsFileInfo *srcfile,
+			struct cifsFileInfo *trgtfile, u64 src_off,
+			u64 len, u64 dest_off)
+{
+	int rc;
+	unsigned int ret_data_len;
+	struct inode *inode;
+	struct duplicate_extents_to_file dup_ext_buf;
+	struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
+
+	/* server fileays advertise duplicate extent support with this flag */
+	if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
+	     FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
+		return -EOPNOTSUPP;
+
+	dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
+	dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
+	dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
+	dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
+	dup_ext_buf.ByteCount = cpu_to_le64(len);
+	cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
+		src_off, dest_off, len);
+
+	inode = d_inode(trgtfile->dentry);
+	if (inode->i_size < dest_off + len) {
+		rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
+		if (rc)
+			goto duplicate_extents_out;
+
+		/*
+		 * Although also could set plausible allocation size (i_blocks)
+		 * here in addition to setting the file size, in reflink
+		 * it is likely that the target file is sparse. Its allocation
+		 * size will be queried on next revalidate, but it is important
+		 * to make sure that file's cached size is updated immediately
+		 */
+		cifs_setsize(inode, dest_off + len);
+	}
+	rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
+			trgtfile->fid.volatile_fid,
+			FSCTL_DUPLICATE_EXTENTS_TO_FILE,
+			(char *)&dup_ext_buf,
+			sizeof(struct duplicate_extents_to_file),
+			CIFSMaxBufSize, NULL,
+			&ret_data_len);
+
+	if (ret_data_len > 0)
+		cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
+
+duplicate_extents_out:
+	return rc;
+}
+
+static int
+smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
+		   struct cifsFileInfo *cfile)
+{
+	return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
+			    cfile->fid.volatile_fid);
+}
+
+static int
+smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
+		   struct cifsFileInfo *cfile)
+{
+	struct fsctl_set_integrity_information_req integr_info;
+	unsigned int ret_data_len;
+
+	integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
+	integr_info.Flags = 0;
+	integr_info.Reserved = 0;
+
+	return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
+			cfile->fid.volatile_fid,
+			FSCTL_SET_INTEGRITY_INFORMATION,
+			(char *)&integr_info,
+			sizeof(struct fsctl_set_integrity_information_req),
+			CIFSMaxBufSize, NULL,
+			&ret_data_len);
+
+}
+
+/* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
+#define GMT_TOKEN_SIZE 50
+
+#define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
+
+/*
+ * Input buffer contains (empty) struct smb_snapshot array with size filled in
+ * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
+ */
+static int
+smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
+		   struct cifsFileInfo *cfile, void __user *ioc_buf)
+{
+	char *retbuf = NULL;
+	unsigned int ret_data_len = 0;
+	int rc;
+	u32 max_response_size;
+	struct smb_snapshot_array snapshot_in;
+
+	/*
+	 * On the first query to enumerate the list of snapshots available
+	 * for this volume the buffer begins with 0 (number of snapshots
+	 * which can be returned is zero since at that point we do not know
+	 * how big the buffer needs to be). On the second query,
+	 * it (ret_data_len) is set to number of snapshots so we can
+	 * know to set the maximum response size larger (see below).
+	 */
+	if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
+		return -EFAULT;
+
+	/*
+	 * Note that for snapshot queries that servers like Azure expect that
+	 * the first query be minimal size (and just used to get the number/size
+	 * of previous versions) so response size must be specified as EXACTLY
+	 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
+	 * of eight bytes.
+	 */
+	if (ret_data_len == 0)
+		max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
+	else
+		max_response_size = CIFSMaxBufSize;
+
+	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
+			cfile->fid.volatile_fid,
+			FSCTL_SRV_ENUMERATE_SNAPSHOTS,
+			NULL, 0 /* no input data */, max_response_size,
+			(char **)&retbuf,
+			&ret_data_len);
+	cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
+			rc, ret_data_len);
+	if (rc)
+		return rc;
+
+	if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
+		/* Fixup buffer */
+		if (copy_from_user(&snapshot_in, ioc_buf,
+		    sizeof(struct smb_snapshot_array))) {
+			rc = -EFAULT;
+			kfree(retbuf);
+			return rc;
+		}
+
+		/*
+		 * Check for min size, ie not large enough to fit even one GMT
+		 * token (snapshot).  On the first ioctl some users may pass in
+		 * smaller size (or zero) to simply get the size of the array
+		 * so the user space caller can allocate sufficient memory
+		 * and retry the ioctl again with larger array size sufficient
+		 * to hold all of the snapshot GMT tokens on the second try.
+		 */
+		if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
+			ret_data_len = sizeof(struct smb_snapshot_array);
+
+		/*
+		 * We return struct SRV_SNAPSHOT_ARRAY, followed by
+		 * the snapshot array (of 50 byte GMT tokens) each
+		 * representing an available previous version of the data
+		 */
+		if (ret_data_len > (snapshot_in.snapshot_array_size +
+					sizeof(struct smb_snapshot_array)))
+			ret_data_len = snapshot_in.snapshot_array_size +
+					sizeof(struct smb_snapshot_array);
+
+		if (copy_to_user(ioc_buf, retbuf, ret_data_len))
+			rc = -EFAULT;
+	}
+
+	kfree(retbuf);
+	return rc;
+}
+
+
+
+static int
+smb3_notify(const unsigned int xid, struct file *pfile,
+	    void __user *ioc_buf, bool return_changes)
+{
+	struct smb3_notify_info notify;
+	struct smb3_notify_info __user *pnotify_buf;
+	struct dentry *dentry = pfile->f_path.dentry;
+	struct inode *inode = file_inode(pfile);
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct cifs_open_parms oparms;
+	struct cifs_fid fid;
+	struct cifs_tcon *tcon;
+	const unsigned char *path;
+	char *returned_ioctl_info = NULL;
+	void *page = alloc_dentry_path();
+	__le16 *utf16_path = NULL;
+	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
+	int rc = 0;
+	__u32 ret_len = 0;
+
+	path = build_path_from_dentry(dentry, page);
+	if (IS_ERR(path)) {
+		rc = PTR_ERR(path);
+		goto notify_exit;
+	}
+
+	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
+	if (utf16_path == NULL) {
+		rc = -ENOMEM;
+		goto notify_exit;
+	}
+
+	if (return_changes) {
+		if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify_info))) {
+			rc = -EFAULT;
+			goto notify_exit;
+		}
+	} else {
+		if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
+			rc = -EFAULT;
+			goto notify_exit;
+		}
+		notify.data_len = 0;
+	}
+
+	tcon = cifs_sb_master_tcon(cifs_sb);
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.path = path,
+		.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
+		.disposition = FILE_OPEN,
+		.create_options = cifs_create_options(cifs_sb, 0),
+		.fid = &fid,
+	};
+
+	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
+		       NULL);
+	if (rc)
+		goto notify_exit;
+
+	rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
+				notify.watch_tree, notify.completion_filter,
+				notify.data_len, &returned_ioctl_info, &ret_len);
+
+	SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
+
+	cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
+	if (return_changes && (ret_len > 0) && (notify.data_len > 0)) {
+		if (ret_len > notify.data_len)
+			ret_len = notify.data_len;
+		pnotify_buf = (struct smb3_notify_info __user *)ioc_buf;
+		if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len))
+			rc = -EFAULT;
+		else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len)))
+			rc = -EFAULT;
+	}
+	kfree(returned_ioctl_info);
+notify_exit:
+	free_dentry_path(page);
+	kfree(utf16_path);
+	return rc;
+}
+
+static int
+smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
+		     const char *path, struct cifs_sb_info *cifs_sb,
+		     struct cifs_fid *fid, __u16 search_flags,
+		     struct cifs_search_info *srch_inf)
+{
+	__le16 *utf16_path;
+	struct smb_rqst rqst[2];
+	struct kvec rsp_iov[2];
+	int resp_buftype[2];
+	struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
+	struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
+	int rc, flags = 0;
+	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
+	struct cifs_open_parms oparms;
+	struct smb2_query_directory_rsp *qd_rsp = NULL;
+	struct smb2_create_rsp *op_rsp = NULL;
+	struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
+	int retry_count = 0;
+
+	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
+	if (!utf16_path)
+		return -ENOMEM;
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	memset(rqst, 0, sizeof(rqst));
+	resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
+	memset(rsp_iov, 0, sizeof(rsp_iov));
+
+	/* Open */
+	memset(&open_iov, 0, sizeof(open_iov));
+	rqst[0].rq_iov = open_iov;
+	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.path = path,
+		.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
+		.disposition = FILE_OPEN,
+		.create_options = cifs_create_options(cifs_sb, 0),
+		.fid = fid,
+	};
+
+	rc = SMB2_open_init(tcon, server,
+			    &rqst[0], &oplock, &oparms, utf16_path);
+	if (rc)
+		goto qdf_free;
+	smb2_set_next_command(tcon, &rqst[0]);
+
+	/* Query directory */
+	srch_inf->entries_in_buffer = 0;
+	srch_inf->index_of_last_entry = 2;
+
+	memset(&qd_iov, 0, sizeof(qd_iov));
+	rqst[1].rq_iov = qd_iov;
+	rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
+
+	rc = SMB2_query_directory_init(xid, tcon, server,
+				       &rqst[1],
+				       COMPOUND_FID, COMPOUND_FID,
+				       0, srch_inf->info_level);
+	if (rc)
+		goto qdf_free;
+
+	smb2_set_related(&rqst[1]);
+
+again:
+	rc = compound_send_recv(xid, tcon->ses, server,
+				flags, 2, rqst,
+				resp_buftype, rsp_iov);
+
+	if (rc == -EAGAIN && retry_count++ < 10)
+		goto again;
+
+	/* If the open failed there is nothing to do */
+	op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
+	if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
+		cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
+		goto qdf_free;
+	}
+	fid->persistent_fid = op_rsp->PersistentFileId;
+	fid->volatile_fid = op_rsp->VolatileFileId;
+
+	/* Anything else than ENODATA means a genuine error */
+	if (rc && rc != -ENODATA) {
+		SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
+		cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
+		trace_smb3_query_dir_err(xid, fid->persistent_fid,
+					 tcon->tid, tcon->ses->Suid, 0, 0, rc);
+		goto qdf_free;
+	}
+
+	atomic_inc(&tcon->num_remote_opens);
+
+	qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
+	if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
+		trace_smb3_query_dir_done(xid, fid->persistent_fid,
+					  tcon->tid, tcon->ses->Suid, 0, 0);
+		srch_inf->endOfSearch = true;
+		rc = 0;
+		goto qdf_free;
+	}
+
+	rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
+					srch_inf);
+	if (rc) {
+		trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
+			tcon->ses->Suid, 0, 0, rc);
+		goto qdf_free;
+	}
+	resp_buftype[1] = CIFS_NO_BUFFER;
+
+	trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
+			tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
+
+ qdf_free:
+	kfree(utf16_path);
+	SMB2_open_free(&rqst[0]);
+	SMB2_query_directory_free(&rqst[1]);
+	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
+	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
+	return rc;
+}
+
+static int
+smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
+		    struct cifs_fid *fid, __u16 search_flags,
+		    struct cifs_search_info *srch_inf)
+{
+	return SMB2_query_directory(xid, tcon, fid->persistent_fid,
+				    fid->volatile_fid, 0, srch_inf);
+}
+
+static int
+smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
+	       struct cifs_fid *fid)
+{
+	return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
+}
+
+/*
+ * If we negotiate SMB2 protocol and get STATUS_PENDING - update
+ * the number of credits and return true. Otherwise - return false.
+ */
+static bool
+smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
+{
+	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
+	int scredits, in_flight;
+
+	if (shdr->Status != STATUS_PENDING)
+		return false;
+
+	if (shdr->CreditRequest) {
+		spin_lock(&server->req_lock);
+		server->credits += le16_to_cpu(shdr->CreditRequest);
+		scredits = server->credits;
+		in_flight = server->in_flight;
+		spin_unlock(&server->req_lock);
+		wake_up(&server->request_q);
+
+		trace_smb3_pend_credits(server->CurrentMid,
+				server->conn_id, server->hostname, scredits,
+				le16_to_cpu(shdr->CreditRequest), in_flight);
+		cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
+				__func__, le16_to_cpu(shdr->CreditRequest), scredits);
+	}
+
+	return true;
+}
+
+static bool
+smb2_is_session_expired(char *buf)
+{
+	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
+
+	if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
+	    shdr->Status != STATUS_USER_SESSION_DELETED)
+		return false;
+
+	trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
+			       le64_to_cpu(shdr->SessionId),
+			       le16_to_cpu(shdr->Command),
+			       le64_to_cpu(shdr->MessageId));
+	cifs_dbg(FYI, "Session expired or deleted\n");
+
+	return true;
+}
+
+static bool
+smb2_is_status_io_timeout(char *buf)
+{
+	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
+
+	if (shdr->Status == STATUS_IO_TIMEOUT)
+		return true;
+	else
+		return false;
+}
+
+static bool
+smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
+{
+	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
+	struct TCP_Server_Info *pserver;
+	struct cifs_ses *ses;
+	struct cifs_tcon *tcon;
+
+	if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
+		return false;
+
+	/* If server is a channel, select the primary channel */
+	pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
+
+	spin_lock(&cifs_tcp_ses_lock);
+	list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
+		list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
+			if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
+				spin_lock(&tcon->tc_lock);
+				tcon->need_reconnect = true;
+				spin_unlock(&tcon->tc_lock);
+				spin_unlock(&cifs_tcp_ses_lock);
+				pr_warn_once("Server share %s deleted.\n",
+					     tcon->tree_name);
+				return true;
+			}
+		}
+	}
+	spin_unlock(&cifs_tcp_ses_lock);
+
+	return false;
+}
+
+static int
+smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid,
+		__u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode)
+{
+	if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
+		return SMB2_lease_break(0, tcon, cinode->lease_key,
+					smb2_get_lease_state(cinode));
+
+	return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid,
+				 CIFS_CACHE_READ(cinode) ? 1 : 0);
+}
+
+void
+smb2_set_related(struct smb_rqst *rqst)
+{
+	struct smb2_hdr *shdr;
+
+	shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
+	if (shdr == NULL) {
+		cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
+		return;
+	}
+	shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
+}
+
+char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
+
+void
+smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
+{
+	struct smb2_hdr *shdr;
+	struct cifs_ses *ses = tcon->ses;
+	struct TCP_Server_Info *server = ses->server;
+	unsigned long len = smb_rqst_len(server, rqst);
+	int i, num_padding;
+
+	shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
+	if (shdr == NULL) {
+		cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
+		return;
+	}
+
+	/* SMB headers in a compound are 8 byte aligned. */
+
+	/* No padding needed */
+	if (!(len & 7))
+		goto finished;
+
+	num_padding = 8 - (len & 7);
+	if (!smb3_encryption_required(tcon)) {
+		/*
+		 * If we do not have encryption then we can just add an extra
+		 * iov for the padding.
+		 */
+		rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
+		rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
+		rqst->rq_nvec++;
+		len += num_padding;
+	} else {
+		/*
+		 * We can not add a small padding iov for the encryption case
+		 * because the encryption framework can not handle the padding
+		 * iovs.
+		 * We have to flatten this into a single buffer and add
+		 * the padding to it.
+		 */
+		for (i = 1; i < rqst->rq_nvec; i++) {
+			memcpy(rqst->rq_iov[0].iov_base +
+			       rqst->rq_iov[0].iov_len,
+			       rqst->rq_iov[i].iov_base,
+			       rqst->rq_iov[i].iov_len);
+			rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
+		}
+		memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
+		       0, num_padding);
+		rqst->rq_iov[0].iov_len += num_padding;
+		len += num_padding;
+		rqst->rq_nvec = 1;
+	}
+
+ finished:
+	shdr->NextCommand = cpu_to_le32(len);
+}
+
+/*
+ * Passes the query info response back to the caller on success.
+ * Caller need to free this with free_rsp_buf().
+ */
+int
+smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
+			 const char *path, u32 desired_access,
+			 u32 class, u32 type, u32 output_len,
+			 struct kvec *rsp, int *buftype,
+			 struct cifs_sb_info *cifs_sb)
+{
+	struct smb2_compound_vars *vars;
+	struct cifs_ses *ses = tcon->ses;
+	struct TCP_Server_Info *server = cifs_pick_channel(ses);
+	int flags = CIFS_CP_CREATE_CLOSE_OP;
+	struct smb_rqst *rqst;
+	int resp_buftype[3];
+	struct kvec *rsp_iov;
+	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
+	struct cifs_open_parms oparms;
+	struct cifs_fid fid;
+	int rc;
+	__le16 *utf16_path;
+	struct cached_fid *cfid = NULL;
+
+	if (!path)
+		path = "";
+	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
+	if (!utf16_path)
+		return -ENOMEM;
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
+	vars = kzalloc(sizeof(*vars), GFP_KERNEL);
+	if (!vars) {
+		rc = -ENOMEM;
+		goto out_free_path;
+	}
+	rqst = vars->rqst;
+	rsp_iov = vars->rsp_iov;
+
+	/*
+	 * We can only call this for things we know are directories.
+	 */
+	if (!strcmp(path, ""))
+		open_cached_dir(xid, tcon, path, cifs_sb, false,
+				&cfid); /* cfid null if open dir failed */
+
+	rqst[0].rq_iov = vars->open_iov;
+	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.path = path,
+		.desired_access = desired_access,
+		.disposition = FILE_OPEN,
+		.create_options = cifs_create_options(cifs_sb, 0),
+		.fid = &fid,
+	};
+
+	rc = SMB2_open_init(tcon, server,
+			    &rqst[0], &oplock, &oparms, utf16_path);
+	if (rc)
+		goto qic_exit;
+	smb2_set_next_command(tcon, &rqst[0]);
+
+	rqst[1].rq_iov = &vars->qi_iov;
+	rqst[1].rq_nvec = 1;
+
+	if (cfid) {
+		rc = SMB2_query_info_init(tcon, server,
+					  &rqst[1],
+					  cfid->fid.persistent_fid,
+					  cfid->fid.volatile_fid,
+					  class, type, 0,
+					  output_len, 0,
+					  NULL);
+	} else {
+		rc = SMB2_query_info_init(tcon, server,
+					  &rqst[1],
+					  COMPOUND_FID,
+					  COMPOUND_FID,
+					  class, type, 0,
+					  output_len, 0,
+					  NULL);
+	}
+	if (rc)
+		goto qic_exit;
+	if (!cfid) {
+		smb2_set_next_command(tcon, &rqst[1]);
+		smb2_set_related(&rqst[1]);
+	}
+
+	rqst[2].rq_iov = &vars->close_iov;
+	rqst[2].rq_nvec = 1;
+
+	rc = SMB2_close_init(tcon, server,
+			     &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
+	if (rc)
+		goto qic_exit;
+	smb2_set_related(&rqst[2]);
+
+	if (cfid) {
+		rc = compound_send_recv(xid, ses, server,
+					flags, 1, &rqst[1],
+					&resp_buftype[1], &rsp_iov[1]);
+	} else {
+		rc = compound_send_recv(xid, ses, server,
+					flags, 3, rqst,
+					resp_buftype, rsp_iov);
+	}
+	if (rc) {
+		free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
+		if (rc == -EREMCHG) {
+			tcon->need_reconnect = true;
+			pr_warn_once("server share %s deleted\n",
+				     tcon->tree_name);
+		}
+		goto qic_exit;
+	}
+	*rsp = rsp_iov[1];
+	*buftype = resp_buftype[1];
+
+ qic_exit:
+	SMB2_open_free(&rqst[0]);
+	SMB2_query_info_free(&rqst[1]);
+	SMB2_close_free(&rqst[2]);
+	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
+	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
+	if (cfid)
+		close_cached_dir(cfid);
+	kfree(vars);
+out_free_path:
+	kfree(utf16_path);
+	return rc;
+}
+
+static int
+smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
+	     struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
+{
+	struct smb2_query_info_rsp *rsp;
+	struct smb2_fs_full_size_info *info = NULL;
+	struct kvec rsp_iov = {NULL, 0};
+	int buftype = CIFS_NO_BUFFER;
+	int rc;
+
+
+	rc = smb2_query_info_compound(xid, tcon, "",
+				      FILE_READ_ATTRIBUTES,
+				      FS_FULL_SIZE_INFORMATION,
+				      SMB2_O_INFO_FILESYSTEM,
+				      sizeof(struct smb2_fs_full_size_info),
+				      &rsp_iov, &buftype, cifs_sb);
+	if (rc)
+		goto qfs_exit;
+
+	rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
+	buf->f_type = SMB2_SUPER_MAGIC;
+	info = (struct smb2_fs_full_size_info *)(
+		le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
+	rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
+			       le32_to_cpu(rsp->OutputBufferLength),
+			       &rsp_iov,
+			       sizeof(struct smb2_fs_full_size_info));
+	if (!rc)
+		smb2_copy_fs_info_to_kstatfs(info, buf);
+
+qfs_exit:
+	trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc);
+	free_rsp_buf(buftype, rsp_iov.iov_base);
+	return rc;
+}
+
+static int
+smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
+	       struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
+{
+	int rc;
+	__le16 srch_path = 0; /* Null - open root of share */
+	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
+	struct cifs_open_parms oparms;
+	struct cifs_fid fid;
+
+	if (!tcon->posix_extensions)
+		return smb2_queryfs(xid, tcon, cifs_sb, buf);
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.path = "",
+		.desired_access = FILE_READ_ATTRIBUTES,
+		.disposition = FILE_OPEN,
+		.create_options = cifs_create_options(cifs_sb, 0),
+		.fid = &fid,
+	};
+
+	rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
+		       NULL, NULL);
+	if (rc)
+		return rc;
+
+	rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
+				   fid.volatile_fid, buf);
+	buf->f_type = SMB2_SUPER_MAGIC;
+	SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
+	return rc;
+}
+
+static bool
+smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
+{
+	return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
+	       ob1->fid.volatile_fid == ob2->fid.volatile_fid;
+}
+
+static int
+smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
+	       __u64 length, __u32 type, int lock, int unlock, bool wait)
+{
+	if (unlock && !lock)
+		type = SMB2_LOCKFLAG_UNLOCK;
+	return SMB2_lock(xid, tlink_tcon(cfile->tlink),
+			 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
+			 current->tgid, length, offset, type, wait);
+}
+
+static void
+smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
+{
+	memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
+}
+
+static void
+smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
+{
+	memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
+}
+
+static void
+smb2_new_lease_key(struct cifs_fid *fid)
+{
+	generate_random_uuid(fid->lease_key);
+}
+
+static int
+smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
+		   const char *search_name,
+		   struct dfs_info3_param **target_nodes,
+		   unsigned int *num_of_nodes,
+		   const struct nls_table *nls_codepage, int remap)
+{
+	int rc;
+	__le16 *utf16_path = NULL;
+	int utf16_path_len = 0;
+	struct cifs_tcon *tcon;
+	struct fsctl_get_dfs_referral_req *dfs_req = NULL;
+	struct get_dfs_referral_rsp *dfs_rsp = NULL;
+	u32 dfs_req_size = 0, dfs_rsp_size = 0;
+	int retry_count = 0;
+
+	cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
+
+	/*
+	 * Try to use the IPC tcon, otherwise just use any
+	 */
+	tcon = ses->tcon_ipc;
+	if (tcon == NULL) {
+		spin_lock(&cifs_tcp_ses_lock);
+		tcon = list_first_entry_or_null(&ses->tcon_list,
+						struct cifs_tcon,
+						tcon_list);
+		if (tcon)
+			tcon->tc_count++;
+		spin_unlock(&cifs_tcp_ses_lock);
+	}
+
+	if (tcon == NULL) {
+		cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
+			 ses);
+		rc = -ENOTCONN;
+		goto out;
+	}
+
+	utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
+					   &utf16_path_len,
+					   nls_codepage, remap);
+	if (!utf16_path) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
+	dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
+	if (!dfs_req) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	/* Highest DFS referral version understood */
+	dfs_req->MaxReferralLevel = DFS_VERSION;
+
+	/* Path to resolve in an UTF-16 null-terminated string */
+	memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
+
+	do {
+		rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
+				FSCTL_DFS_GET_REFERRALS,
+				(char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
+				(char **)&dfs_rsp, &dfs_rsp_size);
+		if (!is_retryable_error(rc))
+			break;
+		usleep_range(512, 2048);
+	} while (++retry_count < 5);
+
+	if (!rc && !dfs_rsp)
+		rc = -EIO;
+	if (rc) {
+		if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)
+			cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc);
+		goto out;
+	}
+
+	rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
+				 num_of_nodes, target_nodes,
+				 nls_codepage, remap, search_name,
+				 true /* is_unicode */);
+	if (rc) {
+		cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
+		goto out;
+	}
+
+ out:
+	if (tcon && !tcon->ipc) {
+		/* ipc tcons are not refcounted */
+		spin_lock(&cifs_tcp_ses_lock);
+		tcon->tc_count--;
+		/* tc_count can never go negative */
+		WARN_ON(tcon->tc_count < 0);
+		spin_unlock(&cifs_tcp_ses_lock);
+	}
+	kfree(utf16_path);
+	kfree(dfs_req);
+	kfree(dfs_rsp);
+	return rc;
+}
+
+/* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
+static int parse_reparse_posix(struct reparse_posix_data *buf,
+			       struct cifs_sb_info *cifs_sb,
+			       struct cifs_open_info_data *data)
+{
+	unsigned int len;
+	u64 type;
+
+	switch ((type = le64_to_cpu(buf->InodeType))) {
+	case NFS_SPECFILE_LNK:
+		len = le16_to_cpu(buf->ReparseDataLength);
+		data->symlink_target = cifs_strndup_from_utf16(buf->DataBuffer,
+							       len, true,
+							       cifs_sb->local_nls);
+		if (!data->symlink_target)
+			return -ENOMEM;
+		convert_delimiter(data->symlink_target, '/');
+		cifs_dbg(FYI, "%s: target path: %s\n",
+			 __func__, data->symlink_target);
+		break;
+	case NFS_SPECFILE_CHR:
+	case NFS_SPECFILE_BLK:
+	case NFS_SPECFILE_FIFO:
+	case NFS_SPECFILE_SOCK:
+		break;
+	default:
+		cifs_dbg(VFS, "%s: unhandled inode type: 0x%llx\n",
+			 __func__, type);
+		return -EOPNOTSUPP;
+	}
+	return 0;
+}
+
+static int parse_reparse_symlink(struct reparse_symlink_data_buffer *sym,
+				 u32 plen, bool unicode,
+				 struct cifs_sb_info *cifs_sb,
+				 struct cifs_open_info_data *data)
+{
+	unsigned int len;
+	unsigned int offs;
+
+	/* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
+
+	offs = le16_to_cpu(sym->SubstituteNameOffset);
+	len = le16_to_cpu(sym->SubstituteNameLength);
+	if (offs + 20 > plen || offs + len + 20 > plen) {
+		cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
+		return -EIO;
+	}
+
+	data->symlink_target = cifs_strndup_from_utf16(sym->PathBuffer + offs,
+						       len, unicode,
+						       cifs_sb->local_nls);
+	if (!data->symlink_target)
+		return -ENOMEM;
+
+	convert_delimiter(data->symlink_target, '/');
+	cifs_dbg(FYI, "%s: target path: %s\n", __func__, data->symlink_target);
+
+	return 0;
+}
+
+int parse_reparse_point(struct reparse_data_buffer *buf,
+			u32 plen, struct cifs_sb_info *cifs_sb,
+			bool unicode, struct cifs_open_info_data *data)
+{
+	if (plen < sizeof(*buf)) {
+		cifs_dbg(VFS, "%s: reparse buffer is too small. Must be at least 8 bytes but was %d\n",
+			 __func__, plen);
+		return -EIO;
+	}
+
+	if (plen < le16_to_cpu(buf->ReparseDataLength) + sizeof(*buf)) {
+		cifs_dbg(VFS, "%s: invalid reparse buf length: %d\n",
+			 __func__, plen);
+		return -EIO;
+	}
+
+	data->reparse.buf = buf;
+
+	/* See MS-FSCC 2.1.2 */
+	switch (le32_to_cpu(buf->ReparseTag)) {
+	case IO_REPARSE_TAG_NFS:
+		return parse_reparse_posix((struct reparse_posix_data *)buf,
+					   cifs_sb, data);
+	case IO_REPARSE_TAG_SYMLINK:
+		return parse_reparse_symlink(
+			(struct reparse_symlink_data_buffer *)buf,
+			plen, unicode, cifs_sb, data);
+	case IO_REPARSE_TAG_LX_SYMLINK:
+	case IO_REPARSE_TAG_AF_UNIX:
+	case IO_REPARSE_TAG_LX_FIFO:
+	case IO_REPARSE_TAG_LX_CHR:
+	case IO_REPARSE_TAG_LX_BLK:
+		return 0;
+	default:
+		cifs_dbg(VFS, "%s: unhandled reparse tag: 0x%08x\n",
+			 __func__, le32_to_cpu(buf->ReparseTag));
+		return -EOPNOTSUPP;
+	}
+}
+
+static int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb,
+				    struct kvec *rsp_iov,
+				    struct cifs_open_info_data *data)
+{
+	struct reparse_data_buffer *buf;
+	struct smb2_ioctl_rsp *io = rsp_iov->iov_base;
+	u32 plen = le32_to_cpu(io->OutputCount);
+
+	buf = (struct reparse_data_buffer *)((u8 *)io +
+					     le32_to_cpu(io->OutputOffset));
+	return parse_reparse_point(buf, plen, cifs_sb, true, data);
+}
+
+static int smb2_query_reparse_point(const unsigned int xid,
+				    struct cifs_tcon *tcon,
+				    struct cifs_sb_info *cifs_sb,
+				    const char *full_path,
+				    u32 *tag, struct kvec *rsp,
+				    int *rsp_buftype)
+{
+	struct smb2_compound_vars *vars;
+	int rc;
+	__le16 *utf16_path = NULL;
+	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
+	struct cifs_open_parms oparms;
+	struct cifs_fid fid;
+	struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
+	int flags = CIFS_CP_CREATE_CLOSE_OP;
+	struct smb_rqst *rqst;
+	int resp_buftype[3];
+	struct kvec *rsp_iov;
+	struct smb2_ioctl_rsp *ioctl_rsp;
+	struct reparse_data_buffer *reparse_buf;
+	u32 off, count, len;
+
+	cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
+	if (!utf16_path)
+		return -ENOMEM;
+
+	resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
+	vars = kzalloc(sizeof(*vars), GFP_KERNEL);
+	if (!vars) {
+		rc = -ENOMEM;
+		goto out_free_path;
+	}
+	rqst = vars->rqst;
+	rsp_iov = vars->rsp_iov;
+
+	/*
+	 * setup smb2open - TODO add optimization to call cifs_get_readable_path
+	 * to see if there is a handle already open that we can use
+	 */
+	rqst[0].rq_iov = vars->open_iov;
+	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.path = full_path,
+		.desired_access = FILE_READ_ATTRIBUTES,
+		.disposition = FILE_OPEN,
+		.create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT),
+		.fid = &fid,
+	};
+
+	rc = SMB2_open_init(tcon, server,
+			    &rqst[0], &oplock, &oparms, utf16_path);
+	if (rc)
+		goto query_rp_exit;
+	smb2_set_next_command(tcon, &rqst[0]);
+
+
+	/* IOCTL */
+	rqst[1].rq_iov = vars->io_iov;
+	rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
+
+	rc = SMB2_ioctl_init(tcon, server,
+			     &rqst[1], COMPOUND_FID,
+			     COMPOUND_FID, FSCTL_GET_REPARSE_POINT, NULL, 0,
+			     CIFSMaxBufSize -
+			     MAX_SMB2_CREATE_RESPONSE_SIZE -
+			     MAX_SMB2_CLOSE_RESPONSE_SIZE);
+	if (rc)
+		goto query_rp_exit;
+
+	smb2_set_next_command(tcon, &rqst[1]);
+	smb2_set_related(&rqst[1]);
+
+	/* Close */
+	rqst[2].rq_iov = &vars->close_iov;
+	rqst[2].rq_nvec = 1;
+
+	rc = SMB2_close_init(tcon, server,
+			     &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
+	if (rc)
+		goto query_rp_exit;
+
+	smb2_set_related(&rqst[2]);
+
+	rc = compound_send_recv(xid, tcon->ses, server,
+				flags, 3, rqst,
+				resp_buftype, rsp_iov);
+
+	ioctl_rsp = rsp_iov[1].iov_base;
+
+	/*
+	 * Open was successful and we got an ioctl response.
+	 */
+	if (rc == 0) {
+		/* See MS-FSCC 2.3.23 */
+		off = le32_to_cpu(ioctl_rsp->OutputOffset);
+		count = le32_to_cpu(ioctl_rsp->OutputCount);
+		if (check_add_overflow(off, count, &len) ||
+		    len > rsp_iov[1].iov_len) {
+			cifs_tcon_dbg(VFS, "%s: invalid ioctl: off=%d count=%d\n",
+				      __func__, off, count);
+			rc = -EIO;
+			goto query_rp_exit;
+		}
+
+		reparse_buf = (void *)((u8 *)ioctl_rsp + off);
+		len = sizeof(*reparse_buf);
+		if (count < len ||
+		    count < le16_to_cpu(reparse_buf->ReparseDataLength) + len) {
+			cifs_tcon_dbg(VFS, "%s: invalid ioctl: off=%d count=%d\n",
+				      __func__, off, count);
+			rc = -EIO;
+			goto query_rp_exit;
+		}
+		*tag = le32_to_cpu(reparse_buf->ReparseTag);
+		*rsp = rsp_iov[1];
+		*rsp_buftype = resp_buftype[1];
+		resp_buftype[1] = CIFS_NO_BUFFER;
+	}
+
+ query_rp_exit:
+	SMB2_open_free(&rqst[0]);
+	SMB2_ioctl_free(&rqst[1]);
+	SMB2_close_free(&rqst[2]);
+	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
+	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
+	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
+	kfree(vars);
+out_free_path:
+	kfree(utf16_path);
+	return rc;
+}
+
+static struct cifs_ntsd *
+get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
+		    const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
+{
+	struct cifs_ntsd *pntsd = NULL;
+	unsigned int xid;
+	int rc = -EOPNOTSUPP;
+	struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
+
+	if (IS_ERR(tlink))
+		return ERR_CAST(tlink);
+
+	xid = get_xid();
+	cifs_dbg(FYI, "trying to get acl\n");
+
+	rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
+			    cifsfid->volatile_fid, (void **)&pntsd, pacllen,
+			    info);
+	free_xid(xid);
+
+	cifs_put_tlink(tlink);
+
+	cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
+	if (rc)
+		return ERR_PTR(rc);
+	return pntsd;
+
+}
+
+static struct cifs_ntsd *
+get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
+		     const char *path, u32 *pacllen, u32 info)
+{
+	struct cifs_ntsd *pntsd = NULL;
+	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
+	unsigned int xid;
+	int rc;
+	struct cifs_tcon *tcon;
+	struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
+	struct cifs_fid fid;
+	struct cifs_open_parms oparms;
+	__le16 *utf16_path;
+
+	cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
+	if (IS_ERR(tlink))
+		return ERR_CAST(tlink);
+
+	tcon = tlink_tcon(tlink);
+	xid = get_xid();
+
+	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
+	if (!utf16_path) {
+		rc = -ENOMEM;
+		free_xid(xid);
+		return ERR_PTR(rc);
+	}
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.path = path,
+		.desired_access = READ_CONTROL,
+		.disposition = FILE_OPEN,
+		/*
+		 * When querying an ACL, even if the file is a symlink
+		 * we want to open the source not the target, and so
+		 * the protocol requires that the client specify this
+		 * flag when opening a reparse point
+		 */
+		.create_options = cifs_create_options(cifs_sb, 0) |
+				  OPEN_REPARSE_POINT,
+		.fid = &fid,
+	};
+
+	if (info & SACL_SECINFO)
+		oparms.desired_access |= SYSTEM_SECURITY;
+
+	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
+		       NULL);
+	kfree(utf16_path);
+	if (!rc) {
+		rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
+				    fid.volatile_fid, (void **)&pntsd, pacllen,
+				    info);
+		SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
+	}
+
+	cifs_put_tlink(tlink);
+	free_xid(xid);
+
+	cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
+	if (rc)
+		return ERR_PTR(rc);
+	return pntsd;
+}
+
+static int
+set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
+		struct inode *inode, const char *path, int aclflag)
+{
+	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
+	unsigned int xid;
+	int rc, access_flags = 0;
+	struct cifs_tcon *tcon;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
+	struct cifs_fid fid;
+	struct cifs_open_parms oparms;
+	__le16 *utf16_path;
+
+	cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+
+	tcon = tlink_tcon(tlink);
+	xid = get_xid();
+
+	if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
+		access_flags |= WRITE_OWNER;
+	if (aclflag & CIFS_ACL_SACL)
+		access_flags |= SYSTEM_SECURITY;
+	if (aclflag & CIFS_ACL_DACL)
+		access_flags |= WRITE_DAC;
+
+	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
+	if (!utf16_path) {
+		rc = -ENOMEM;
+		free_xid(xid);
+		return rc;
+	}
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.desired_access = access_flags,
+		.create_options = cifs_create_options(cifs_sb, 0),
+		.disposition = FILE_OPEN,
+		.path = path,
+		.fid = &fid,
+	};
+
+	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
+		       NULL, NULL);
+	kfree(utf16_path);
+	if (!rc) {
+		rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
+			    fid.volatile_fid, pnntsd, acllen, aclflag);
+		SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
+	}
+
+	cifs_put_tlink(tlink);
+	free_xid(xid);
+	return rc;
+}
+
+/* Retrieve an ACL from the server */
+static struct cifs_ntsd *
+get_smb2_acl(struct cifs_sb_info *cifs_sb,
+	     struct inode *inode, const char *path,
+	     u32 *pacllen, u32 info)
+{
+	struct cifs_ntsd *pntsd = NULL;
+	struct cifsFileInfo *open_file = NULL;
+
+	if (inode && !(info & SACL_SECINFO))
+		open_file = find_readable_file(CIFS_I(inode), true);
+	if (!open_file || (info & SACL_SECINFO))
+		return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
+
+	pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
+	cifsFileInfo_put(open_file);
+	return pntsd;
+}
+
+static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,
+			     loff_t offset, loff_t len, unsigned int xid)
+{
+	struct cifsFileInfo *cfile = file->private_data;
+	struct file_zero_data_information fsctl_buf;
+
+	cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
+
+	fsctl_buf.FileOffset = cpu_to_le64(offset);
+	fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
+
+	return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
+			  cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
+			  (char *)&fsctl_buf,
+			  sizeof(struct file_zero_data_information),
+			  0, NULL, NULL);
+}
+
+static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
+			    loff_t offset, loff_t len, bool keep_size)
+{
+	struct cifs_ses *ses = tcon->ses;
+	struct inode *inode = file_inode(file);
+	struct cifsInodeInfo *cifsi = CIFS_I(inode);
+	struct cifsFileInfo *cfile = file->private_data;
+	unsigned long long new_size;
+	long rc;
+	unsigned int xid;
+	__le64 eof;
+
+	xid = get_xid();
+
+	trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
+			      ses->Suid, offset, len);
+
+	inode_lock(inode);
+	filemap_invalidate_lock(inode->i_mapping);
+
+	/*
+	 * We zero the range through ioctl, so we need remove the page caches
+	 * first, otherwise the data may be inconsistent with the server.
+	 */
+	truncate_pagecache_range(inode, offset, offset + len - 1);
+
+	/* if file not oplocked can't be sure whether asking to extend size */
+	rc = -EOPNOTSUPP;
+	if (keep_size == false && !CIFS_CACHE_READ(cifsi))
+		goto zero_range_exit;
+
+	rc = smb3_zero_data(file, tcon, offset, len, xid);
+	if (rc < 0)
+		goto zero_range_exit;
+
+	/*
+	 * do we also need to change the size of the file?
+	 */
+	new_size = offset + len;
+	if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) {
+		eof = cpu_to_le64(new_size);
+		rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
+				  cfile->fid.volatile_fid, cfile->pid, &eof);
+		if (rc >= 0) {
+			truncate_setsize(inode, new_size);
+			fscache_resize_cookie(cifs_inode_cookie(inode), new_size);
+		}
+	}
+
+ zero_range_exit:
+	filemap_invalidate_unlock(inode->i_mapping);
+	inode_unlock(inode);
+	free_xid(xid);
+	if (rc)
+		trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
+			      ses->Suid, offset, len, rc);
+	else
+		trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
+			      ses->Suid, offset, len);
+	return rc;
+}
+
+static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
+			    loff_t offset, loff_t len)
+{
+	struct inode *inode = file_inode(file);
+	struct cifsFileInfo *cfile = file->private_data;
+	struct file_zero_data_information fsctl_buf;
+	long rc;
+	unsigned int xid;
+	__u8 set_sparse = 1;
+
+	xid = get_xid();
+
+	inode_lock(inode);
+	/* Need to make file sparse, if not already, before freeing range. */
+	/* Consider adding equivalent for compressed since it could also work */
+	if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
+		rc = -EOPNOTSUPP;
+		goto out;
+	}
+
+	filemap_invalidate_lock(inode->i_mapping);
+	/*
+	 * We implement the punch hole through ioctl, so we need remove the page
+	 * caches first, otherwise the data may be inconsistent with the server.
+	 */
+	truncate_pagecache_range(inode, offset, offset + len - 1);
+
+	cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
+
+	fsctl_buf.FileOffset = cpu_to_le64(offset);
+	fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
+
+	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
+			cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
+			(char *)&fsctl_buf,
+			sizeof(struct file_zero_data_information),
+			CIFSMaxBufSize, NULL, NULL);
+	filemap_invalidate_unlock(inode->i_mapping);
+out:
+	inode_unlock(inode);
+	free_xid(xid);
+	return rc;
+}
+
+static int smb3_simple_fallocate_write_range(unsigned int xid,
+					     struct cifs_tcon *tcon,
+					     struct cifsFileInfo *cfile,
+					     loff_t off, loff_t len,
+					     char *buf)
+{
+	struct cifs_io_parms io_parms = {0};
+	int nbytes;
+	int rc = 0;
+	struct kvec iov[2];
+
+	io_parms.netfid = cfile->fid.netfid;
+	io_parms.pid = current->tgid;
+	io_parms.tcon = tcon;
+	io_parms.persistent_fid = cfile->fid.persistent_fid;
+	io_parms.volatile_fid = cfile->fid.volatile_fid;
+
+	while (len) {
+		io_parms.offset = off;
+		io_parms.length = len;
+		if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
+			io_parms.length = SMB2_MAX_BUFFER_SIZE;
+		/* iov[0] is reserved for smb header */
+		iov[1].iov_base = buf;
+		iov[1].iov_len = io_parms.length;
+		rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
+		if (rc)
+			break;
+		if (nbytes > len)
+			return -EINVAL;
+		buf += nbytes;
+		off += nbytes;
+		len -= nbytes;
+	}
+	return rc;
+}
+
+static int smb3_simple_fallocate_range(unsigned int xid,
+				       struct cifs_tcon *tcon,
+				       struct cifsFileInfo *cfile,
+				       loff_t off, loff_t len)
+{
+	struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
+	u32 out_data_len;
+	char *buf = NULL;
+	loff_t l;
+	int rc;
+
+	in_data.file_offset = cpu_to_le64(off);
+	in_data.length = cpu_to_le64(len);
+	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
+			cfile->fid.volatile_fid,
+			FSCTL_QUERY_ALLOCATED_RANGES,
+			(char *)&in_data, sizeof(in_data),
+			1024 * sizeof(struct file_allocated_range_buffer),
+			(char **)&out_data, &out_data_len);
+	if (rc)
+		goto out;
+
+	buf = kzalloc(1024 * 1024, GFP_KERNEL);
+	if (buf == NULL) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	tmp_data = out_data;
+	while (len) {
+		/*
+		 * The rest of the region is unmapped so write it all.
+		 */
+		if (out_data_len == 0) {
+			rc = smb3_simple_fallocate_write_range(xid, tcon,
+					       cfile, off, len, buf);
+			goto out;
+		}
+
+		if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
+			rc = -EINVAL;
+			goto out;
+		}
+
+		if (off < le64_to_cpu(tmp_data->file_offset)) {
+			/*
+			 * We are at a hole. Write until the end of the region
+			 * or until the next allocated data,
+			 * whichever comes next.
+			 */
+			l = le64_to_cpu(tmp_data->file_offset) - off;
+			if (len < l)
+				l = len;
+			rc = smb3_simple_fallocate_write_range(xid, tcon,
+					       cfile, off, l, buf);
+			if (rc)
+				goto out;
+			off = off + l;
+			len = len - l;
+			if (len == 0)
+				goto out;
+		}
+		/*
+		 * We are at a section of allocated data, just skip forward
+		 * until the end of the data or the end of the region
+		 * we are supposed to fallocate, whichever comes first.
+		 */
+		l = le64_to_cpu(tmp_data->length);
+		if (len < l)
+			l = len;
+		off += l;
+		len -= l;
+
+		tmp_data = &tmp_data[1];
+		out_data_len -= sizeof(struct file_allocated_range_buffer);
+	}
+
+ out:
+	kfree(out_data);
+	kfree(buf);
+	return rc;
+}
+
+
+static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
+			    loff_t off, loff_t len, bool keep_size)
+{
+	struct inode *inode;
+	struct cifsInodeInfo *cifsi;
+	struct cifsFileInfo *cfile = file->private_data;
+	long rc = -EOPNOTSUPP;
+	unsigned int xid;
+	__le64 eof;
+
+	xid = get_xid();
+
+	inode = d_inode(cfile->dentry);
+	cifsi = CIFS_I(inode);
+
+	trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
+				tcon->ses->Suid, off, len);
+	/* if file not oplocked can't be sure whether asking to extend size */
+	if (!CIFS_CACHE_READ(cifsi))
+		if (keep_size == false) {
+			trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
+				tcon->tid, tcon->ses->Suid, off, len, rc);
+			free_xid(xid);
+			return rc;
+		}
+
+	/*
+	 * Extending the file
+	 */
+	if ((keep_size == false) && i_size_read(inode) < off + len) {
+		rc = inode_newsize_ok(inode, off + len);
+		if (rc)
+			goto out;
+
+		if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
+			smb2_set_sparse(xid, tcon, cfile, inode, false);
+
+		eof = cpu_to_le64(off + len);
+		rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
+				  cfile->fid.volatile_fid, cfile->pid, &eof);
+		if (rc == 0) {
+			cifsi->server_eof = off + len;
+			cifs_setsize(inode, off + len);
+			cifs_truncate_page(inode->i_mapping, inode->i_size);
+			truncate_setsize(inode, off + len);
+		}
+		goto out;
+	}
+
+	/*
+	 * Files are non-sparse by default so falloc may be a no-op
+	 * Must check if file sparse. If not sparse, and since we are not
+	 * extending then no need to do anything since file already allocated
+	 */
+	if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
+		rc = 0;
+		goto out;
+	}
+
+	if (keep_size == true) {
+		/*
+		 * We can not preallocate pages beyond the end of the file
+		 * in SMB2
+		 */
+		if (off >= i_size_read(inode)) {
+			rc = 0;
+			goto out;
+		}
+		/*
+		 * For fallocates that are partially beyond the end of file,
+		 * clamp len so we only fallocate up to the end of file.
+		 */
+		if (off + len > i_size_read(inode)) {
+			len = i_size_read(inode) - off;
+		}
+	}
+
+	if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
+		/*
+		 * At this point, we are trying to fallocate an internal
+		 * regions of a sparse file. Since smb2 does not have a
+		 * fallocate command we have two otions on how to emulate this.
+		 * We can either turn the entire file to become non-sparse
+		 * which we only do if the fallocate is for virtually
+		 * the whole file,  or we can overwrite the region with zeroes
+		 * using SMB2_write, which could be prohibitevly expensive
+		 * if len is large.
+		 */
+		/*
+		 * We are only trying to fallocate a small region so
+		 * just write it with zero.
+		 */
+		if (len <= 1024 * 1024) {
+			rc = smb3_simple_fallocate_range(xid, tcon, cfile,
+							 off, len);
+			goto out;
+		}
+
+		/*
+		 * Check if falloc starts within first few pages of file
+		 * and ends within a few pages of the end of file to
+		 * ensure that most of file is being forced to be
+		 * fallocated now. If so then setting whole file sparse
+		 * ie potentially making a few extra pages at the beginning
+		 * or end of the file non-sparse via set_sparse is harmless.
+		 */
+		if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
+			rc = -EOPNOTSUPP;
+			goto out;
+		}
+	}
+
+	smb2_set_sparse(xid, tcon, cfile, inode, false);
+	rc = 0;
+
+out:
+	if (rc)
+		trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
+				tcon->ses->Suid, off, len, rc);
+	else
+		trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
+				tcon->ses->Suid, off, len);
+
+	free_xid(xid);
+	return rc;
+}
+
+static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
+			    loff_t off, loff_t len)
+{
+	int rc;
+	unsigned int xid;
+	struct inode *inode = file_inode(file);
+	struct cifsFileInfo *cfile = file->private_data;
+	struct cifsInodeInfo *cifsi = CIFS_I(inode);
+	__le64 eof;
+	loff_t old_eof;
+
+	xid = get_xid();
+
+	inode_lock(inode);
+
+	old_eof = i_size_read(inode);
+	if ((off >= old_eof) ||
+	    off + len >= old_eof) {
+		rc = -EINVAL;
+		goto out;
+	}
+
+	filemap_invalidate_lock(inode->i_mapping);
+	rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);
+	if (rc < 0)
+		goto out_2;
+
+	truncate_pagecache_range(inode, off, old_eof);
+
+	rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
+				  old_eof - off - len, off);
+	if (rc < 0)
+		goto out_2;
+
+	eof = cpu_to_le64(old_eof - len);
+	rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
+			  cfile->fid.volatile_fid, cfile->pid, &eof);
+	if (rc < 0)
+		goto out_2;
+
+	rc = 0;
+
+	cifsi->server_eof = i_size_read(inode) - len;
+	truncate_setsize(inode, cifsi->server_eof);
+	fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof);
+out_2:
+	filemap_invalidate_unlock(inode->i_mapping);
+ out:
+	inode_unlock(inode);
+	free_xid(xid);
+	return rc;
+}
+
+static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
+			      loff_t off, loff_t len)
+{
+	int rc;
+	unsigned int xid;
+	struct cifsFileInfo *cfile = file->private_data;
+	struct inode *inode = file_inode(file);
+	__le64 eof;
+	__u64  count, old_eof;
+
+	xid = get_xid();
+
+	inode_lock(inode);
+
+	old_eof = i_size_read(inode);
+	if (off >= old_eof) {
+		rc = -EINVAL;
+		goto out;
+	}
+
+	count = old_eof - off;
+	eof = cpu_to_le64(old_eof + len);
+
+	filemap_invalidate_lock(inode->i_mapping);
+	rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof + len - 1);
+	if (rc < 0)
+		goto out_2;
+	truncate_pagecache_range(inode, off, old_eof);
+
+	rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
+			  cfile->fid.volatile_fid, cfile->pid, &eof);
+	if (rc < 0)
+		goto out_2;
+
+	truncate_setsize(inode, old_eof + len);
+	fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode));
+
+	rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
+	if (rc < 0)
+		goto out_2;
+
+	rc = smb3_zero_data(file, tcon, off, len, xid);
+	if (rc < 0)
+		goto out_2;
+
+	rc = 0;
+out_2:
+	filemap_invalidate_unlock(inode->i_mapping);
+ out:
+	inode_unlock(inode);
+	free_xid(xid);
+	return rc;
+}
+
+static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
+{
+	struct cifsFileInfo *wrcfile, *cfile = file->private_data;
+	struct cifsInodeInfo *cifsi;
+	struct inode *inode;
+	int rc = 0;
+	struct file_allocated_range_buffer in_data, *out_data = NULL;
+	u32 out_data_len;
+	unsigned int xid;
+
+	if (whence != SEEK_HOLE && whence != SEEK_DATA)
+		return generic_file_llseek(file, offset, whence);
+
+	inode = d_inode(cfile->dentry);
+	cifsi = CIFS_I(inode);
+
+	if (offset < 0 || offset >= i_size_read(inode))
+		return -ENXIO;
+
+	xid = get_xid();
+	/*
+	 * We need to be sure that all dirty pages are written as they
+	 * might fill holes on the server.
+	 * Note that we also MUST flush any written pages since at least
+	 * some servers (Windows2016) will not reflect recent writes in
+	 * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
+	 */
+	wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
+	if (wrcfile) {
+		filemap_write_and_wait(inode->i_mapping);
+		smb2_flush_file(xid, tcon, &wrcfile->fid);
+		cifsFileInfo_put(wrcfile);
+	}
+
+	if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
+		if (whence == SEEK_HOLE)
+			offset = i_size_read(inode);
+		goto lseek_exit;
+	}
+
+	in_data.file_offset = cpu_to_le64(offset);
+	in_data.length = cpu_to_le64(i_size_read(inode));
+
+	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
+			cfile->fid.volatile_fid,
+			FSCTL_QUERY_ALLOCATED_RANGES,
+			(char *)&in_data, sizeof(in_data),
+			sizeof(struct file_allocated_range_buffer),
+			(char **)&out_data, &out_data_len);
+	if (rc == -E2BIG)
+		rc = 0;
+	if (rc)
+		goto lseek_exit;
+
+	if (whence == SEEK_HOLE && out_data_len == 0)
+		goto lseek_exit;
+
+	if (whence == SEEK_DATA && out_data_len == 0) {
+		rc = -ENXIO;
+		goto lseek_exit;
+	}
+
+	if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
+		rc = -EINVAL;
+		goto lseek_exit;
+	}
+	if (whence == SEEK_DATA) {
+		offset = le64_to_cpu(out_data->file_offset);
+		goto lseek_exit;
+	}
+	if (offset < le64_to_cpu(out_data->file_offset))
+		goto lseek_exit;
+
+	offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
+
+ lseek_exit:
+	free_xid(xid);
+	kfree(out_data);
+	if (!rc)
+		return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
+	else
+		return rc;
+}
+
+static int smb3_fiemap(struct cifs_tcon *tcon,
+		       struct cifsFileInfo *cfile,
+		       struct fiemap_extent_info *fei, u64 start, u64 len)
+{
+	unsigned int xid;
+	struct file_allocated_range_buffer in_data, *out_data;
+	u32 out_data_len;
+	int i, num, rc, flags, last_blob;
+	u64 next;
+
+	rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
+	if (rc)
+		return rc;
+
+	xid = get_xid();
+ again:
+	in_data.file_offset = cpu_to_le64(start);
+	in_data.length = cpu_to_le64(len);
+
+	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
+			cfile->fid.volatile_fid,
+			FSCTL_QUERY_ALLOCATED_RANGES,
+			(char *)&in_data, sizeof(in_data),
+			1024 * sizeof(struct file_allocated_range_buffer),
+			(char **)&out_data, &out_data_len);
+	if (rc == -E2BIG) {
+		last_blob = 0;
+		rc = 0;
+	} else
+		last_blob = 1;
+	if (rc)
+		goto out;
+
+	if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
+		rc = -EINVAL;
+		goto out;
+	}
+	if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
+		rc = -EINVAL;
+		goto out;
+	}
+
+	num = out_data_len / sizeof(struct file_allocated_range_buffer);
+	for (i = 0; i < num; i++) {
+		flags = 0;
+		if (i == num - 1 && last_blob)
+			flags |= FIEMAP_EXTENT_LAST;
+
+		rc = fiemap_fill_next_extent(fei,
+				le64_to_cpu(out_data[i].file_offset),
+				le64_to_cpu(out_data[i].file_offset),
+				le64_to_cpu(out_data[i].length),
+				flags);
+		if (rc < 0)
+			goto out;
+		if (rc == 1) {
+			rc = 0;
+			goto out;
+		}
+	}
+
+	if (!last_blob) {
+		next = le64_to_cpu(out_data[num - 1].file_offset) +
+		  le64_to_cpu(out_data[num - 1].length);
+		len = len - (next - start);
+		start = next;
+		goto again;
+	}
+
+ out:
+	free_xid(xid);
+	kfree(out_data);
+	return rc;
+}
+
+static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
+			   loff_t off, loff_t len)
+{
+	/* KEEP_SIZE already checked for by do_fallocate */
+	if (mode & FALLOC_FL_PUNCH_HOLE)
+		return smb3_punch_hole(file, tcon, off, len);
+	else if (mode & FALLOC_FL_ZERO_RANGE) {
+		if (mode & FALLOC_FL_KEEP_SIZE)
+			return smb3_zero_range(file, tcon, off, len, true);
+		return smb3_zero_range(file, tcon, off, len, false);
+	} else if (mode == FALLOC_FL_KEEP_SIZE)
+		return smb3_simple_falloc(file, tcon, off, len, true);
+	else if (mode == FALLOC_FL_COLLAPSE_RANGE)
+		return smb3_collapse_range(file, tcon, off, len);
+	else if (mode == FALLOC_FL_INSERT_RANGE)
+		return smb3_insert_range(file, tcon, off, len);
+	else if (mode == 0)
+		return smb3_simple_falloc(file, tcon, off, len, false);
+
+	return -EOPNOTSUPP;
+}
+
+static void
+smb2_downgrade_oplock(struct TCP_Server_Info *server,
+		      struct cifsInodeInfo *cinode, __u32 oplock,
+		      unsigned int epoch, bool *purge_cache)
+{
+	server->ops->set_oplock_level(cinode, oplock, 0, NULL);
+}
+
+static void
+smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
+		       unsigned int epoch, bool *purge_cache);
+
+static void
+smb3_downgrade_oplock(struct TCP_Server_Info *server,
+		       struct cifsInodeInfo *cinode, __u32 oplock,
+		       unsigned int epoch, bool *purge_cache)
+{
+	unsigned int old_state = cinode->oplock;
+	unsigned int old_epoch = cinode->epoch;
+	unsigned int new_state;
+
+	if (epoch > old_epoch) {
+		smb21_set_oplock_level(cinode, oplock, 0, NULL);
+		cinode->epoch = epoch;
+	}
+
+	new_state = cinode->oplock;
+	*purge_cache = false;
+
+	if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
+	    (new_state & CIFS_CACHE_READ_FLG) == 0)
+		*purge_cache = true;
+	else if (old_state == new_state && (epoch - old_epoch > 1))
+		*purge_cache = true;
+}
+
+static void
+smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
+		      unsigned int epoch, bool *purge_cache)
+{
+	oplock &= 0xFF;
+	cinode->lease_granted = false;
+	if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
+		return;
+	if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
+		cinode->oplock = CIFS_CACHE_RHW_FLG;
+		cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
+			 &cinode->netfs.inode);
+	} else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
+		cinode->oplock = CIFS_CACHE_RW_FLG;
+		cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
+			 &cinode->netfs.inode);
+	} else if (oplock == SMB2_OPLOCK_LEVEL_II) {
+		cinode->oplock = CIFS_CACHE_READ_FLG;
+		cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
+			 &cinode->netfs.inode);
+	} else
+		cinode->oplock = 0;
+}
+
+static void
+smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
+		       unsigned int epoch, bool *purge_cache)
+{
+	char message[5] = {0};
+	unsigned int new_oplock = 0;
+
+	oplock &= 0xFF;
+	cinode->lease_granted = true;
+	if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
+		return;
+
+	/* Check if the server granted an oplock rather than a lease */
+	if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
+		return smb2_set_oplock_level(cinode, oplock, epoch,
+					     purge_cache);
+
+	if (oplock & SMB2_LEASE_READ_CACHING_HE) {
+		new_oplock |= CIFS_CACHE_READ_FLG;
+		strcat(message, "R");
+	}
+	if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
+		new_oplock |= CIFS_CACHE_HANDLE_FLG;
+		strcat(message, "H");
+	}
+	if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
+		new_oplock |= CIFS_CACHE_WRITE_FLG;
+		strcat(message, "W");
+	}
+	if (!new_oplock)
+		strncpy(message, "None", sizeof(message));
+
+	cinode->oplock = new_oplock;
+	cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
+		 &cinode->netfs.inode);
+}
+
+static void
+smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
+		      unsigned int epoch, bool *purge_cache)
+{
+	unsigned int old_oplock = cinode->oplock;
+
+	smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
+
+	if (purge_cache) {
+		*purge_cache = false;
+		if (old_oplock == CIFS_CACHE_READ_FLG) {
+			if (cinode->oplock == CIFS_CACHE_READ_FLG &&
+			    (epoch - cinode->epoch > 0))
+				*purge_cache = true;
+			else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
+				 (epoch - cinode->epoch > 1))
+				*purge_cache = true;
+			else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
+				 (epoch - cinode->epoch > 1))
+				*purge_cache = true;
+			else if (cinode->oplock == 0 &&
+				 (epoch - cinode->epoch > 0))
+				*purge_cache = true;
+		} else if (old_oplock == CIFS_CACHE_RH_FLG) {
+			if (cinode->oplock == CIFS_CACHE_RH_FLG &&
+			    (epoch - cinode->epoch > 0))
+				*purge_cache = true;
+			else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
+				 (epoch - cinode->epoch > 1))
+				*purge_cache = true;
+		}
+		cinode->epoch = epoch;
+	}
+}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+static bool
+smb2_is_read_op(__u32 oplock)
+{
+	return oplock == SMB2_OPLOCK_LEVEL_II;
+}
+#endif /* CIFS_ALLOW_INSECURE_LEGACY */
+
+static bool
+smb21_is_read_op(__u32 oplock)
+{
+	return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
+	       !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
+}
+
+static __le32
+map_oplock_to_lease(u8 oplock)
+{
+	if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
+		return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE;
+	else if (oplock == SMB2_OPLOCK_LEVEL_II)
+		return SMB2_LEASE_READ_CACHING_LE;
+	else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
+		return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE |
+		       SMB2_LEASE_WRITE_CACHING_LE;
+	return 0;
+}
+
+static char *
+smb2_create_lease_buf(u8 *lease_key, u8 oplock)
+{
+	struct create_lease *buf;
+
+	buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
+	if (!buf)
+		return NULL;
+
+	memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
+	buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
+
+	buf->ccontext.DataOffset = cpu_to_le16(offsetof
+					(struct create_lease, lcontext));
+	buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
+	buf->ccontext.NameOffset = cpu_to_le16(offsetof
+				(struct create_lease, Name));
+	buf->ccontext.NameLength = cpu_to_le16(4);
+	/* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
+	buf->Name[0] = 'R';
+	buf->Name[1] = 'q';
+	buf->Name[2] = 'L';
+	buf->Name[3] = 's';
+	return (char *)buf;
+}
+
+static char *
+smb3_create_lease_buf(u8 *lease_key, u8 oplock)
+{
+	struct create_lease_v2 *buf;
+
+	buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
+	if (!buf)
+		return NULL;
+
+	memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
+	buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
+
+	buf->ccontext.DataOffset = cpu_to_le16(offsetof
+					(struct create_lease_v2, lcontext));
+	buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
+	buf->ccontext.NameOffset = cpu_to_le16(offsetof
+				(struct create_lease_v2, Name));
+	buf->ccontext.NameLength = cpu_to_le16(4);
+	/* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
+	buf->Name[0] = 'R';
+	buf->Name[1] = 'q';
+	buf->Name[2] = 'L';
+	buf->Name[3] = 's';
+	return (char *)buf;
+}
+
+static __u8
+smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
+{
+	struct create_lease *lc = (struct create_lease *)buf;
+
+	*epoch = 0; /* not used */
+	if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
+		return SMB2_OPLOCK_LEVEL_NOCHANGE;
+	return le32_to_cpu(lc->lcontext.LeaseState);
+}
+
+static __u8
+smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
+{
+	struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
+
+	*epoch = le16_to_cpu(lc->lcontext.Epoch);
+	if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
+		return SMB2_OPLOCK_LEVEL_NOCHANGE;
+	if (lease_key)
+		memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
+	return le32_to_cpu(lc->lcontext.LeaseState);
+}
+
+static unsigned int
+smb2_wp_retry_size(struct inode *inode)
+{
+	return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
+		     SMB2_MAX_BUFFER_SIZE);
+}
+
+static bool
+smb2_dir_needs_close(struct cifsFileInfo *cfile)
+{
+	return !cfile->invalidHandle;
+}
+
+static void
+fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
+		   struct smb_rqst *old_rq, __le16 cipher_type)
+{
+	struct smb2_hdr *shdr =
+			(struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
+
+	memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
+	tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
+	tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
+	tr_hdr->Flags = cpu_to_le16(0x01);
+	if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
+	    (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
+		get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
+	else
+		get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
+	memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
+}
+
+static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
+				 int num_rqst, const u8 *sig, u8 **iv,
+				 struct aead_request **req, struct sg_table *sgt,
+				 unsigned int *num_sgs, size_t *sensitive_size)
+{
+	unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
+	unsigned int iv_size = crypto_aead_ivsize(tfm);
+	unsigned int len;
+	u8 *p;
+
+	*num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
+	if (IS_ERR_VALUE((long)(int)*num_sgs))
+		return ERR_PTR(*num_sgs);
+
+	len = iv_size;
+	len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
+	len = ALIGN(len, crypto_tfm_ctx_alignment());
+	len += req_size;
+	len = ALIGN(len, __alignof__(struct scatterlist));
+	len += array_size(*num_sgs, sizeof(struct scatterlist));
+	*sensitive_size = len;
+
+	p = kvzalloc(len, GFP_NOFS);
+	if (!p)
+		return ERR_PTR(-ENOMEM);
+
+	*iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
+	*req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
+						crypto_tfm_ctx_alignment());
+	sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
+						   __alignof__(struct scatterlist));
+	return p;
+}
+
+static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst,
+			       int num_rqst, const u8 *sig, u8 **iv,
+			       struct aead_request **req, struct scatterlist **sgl,
+			       size_t *sensitive_size)
+{
+	struct sg_table sgtable = {};
+	unsigned int skip, num_sgs, i, j;
+	ssize_t rc;
+	void *p;
+
+	p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable,
+				&num_sgs, sensitive_size);
+	if (IS_ERR(p))
+		return ERR_CAST(p);
+
+	sg_init_marker(sgtable.sgl, num_sgs);
+
+	/*
+	 * The first rqst has a transform header where the
+	 * first 20 bytes are not part of the encrypted blob.
+	 */
+	skip = 20;
+
+	for (i = 0; i < num_rqst; i++) {
+		struct iov_iter *iter = &rqst[i].rq_iter;
+		size_t count = iov_iter_count(iter);
+
+		for (j = 0; j < rqst[i].rq_nvec; j++) {
+			cifs_sg_set_buf(&sgtable,
+					rqst[i].rq_iov[j].iov_base + skip,
+					rqst[i].rq_iov[j].iov_len - skip);
+
+			/* See the above comment on the 'skip' assignment */
+			skip = 0;
+		}
+		sgtable.orig_nents = sgtable.nents;
+
+		rc = extract_iter_to_sg(iter, count, &sgtable,
+					num_sgs - sgtable.nents, 0);
+		iov_iter_revert(iter, rc);
+		sgtable.orig_nents = sgtable.nents;
+	}
+
+	cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE);
+	sg_mark_end(&sgtable.sgl[sgtable.nents - 1]);
+	*sgl = sgtable.sgl;
+	return p;
+}
+
+static int
+smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
+{
+	struct TCP_Server_Info *pserver;
+	struct cifs_ses *ses;
+	u8 *ses_enc_key;
+
+	/* If server is a channel, select the primary channel */
+	pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
+
+	spin_lock(&cifs_tcp_ses_lock);
+	list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
+		if (ses->Suid == ses_id) {
+			spin_lock(&ses->ses_lock);
+			ses_enc_key = enc ? ses->smb3encryptionkey :
+				ses->smb3decryptionkey;
+			memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
+			spin_unlock(&ses->ses_lock);
+			spin_unlock(&cifs_tcp_ses_lock);
+			return 0;
+		}
+	}
+	spin_unlock(&cifs_tcp_ses_lock);
+
+	trace_smb3_ses_not_found(ses_id);
+
+	return -EAGAIN;
+}
+/*
+ * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
+ * iov[0]   - transform header (associate data),
+ * iov[1-N] - SMB2 header and pages - data to encrypt.
+ * On success return encrypted data in iov[1-N] and pages, leave iov[0]
+ * untouched.
+ */
+static int
+crypt_message(struct TCP_Server_Info *server, int num_rqst,
+	      struct smb_rqst *rqst, int enc)
+{
+	struct smb2_transform_hdr *tr_hdr =
+		(struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
+	unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
+	int rc = 0;
+	struct scatterlist *sg;
+	u8 sign[SMB2_SIGNATURE_SIZE] = {};
+	u8 key[SMB3_ENC_DEC_KEY_SIZE];
+	struct aead_request *req;
+	u8 *iv;
+	DECLARE_CRYPTO_WAIT(wait);
+	struct crypto_aead *tfm;
+	unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
+	void *creq;
+	size_t sensitive_size;
+
+	rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
+	if (rc) {
+		cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__,
+			 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId));
+		return rc;
+	}
+
+	rc = smb3_crypto_aead_allocate(server);
+	if (rc) {
+		cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
+		return rc;
+	}
+
+	tfm = enc ? server->secmech.enc : server->secmech.dec;
+
+	if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
+		(server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
+		rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
+	else
+		rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
+
+	if (rc) {
+		cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
+		return rc;
+	}
+
+	rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
+	if (rc) {
+		cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
+		return rc;
+	}
+
+	creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg,
+				 &sensitive_size);
+	if (IS_ERR(creq))
+		return PTR_ERR(creq);
+
+	if (!enc) {
+		memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
+		crypt_len += SMB2_SIGNATURE_SIZE;
+	}
+
+	if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
+	    (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
+		memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
+	else {
+		iv[0] = 3;
+		memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
+	}
+
+	aead_request_set_tfm(req, tfm);
+	aead_request_set_crypt(req, sg, sg, crypt_len, iv);
+	aead_request_set_ad(req, assoc_data_len);
+
+	aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
+				  crypto_req_done, &wait);
+
+	rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
+				: crypto_aead_decrypt(req), &wait);
+
+	if (!rc && enc)
+		memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
+
+	kvfree_sensitive(creq, sensitive_size);
+	return rc;
+}
+
+/*
+ * Clear a read buffer, discarding the folios which have XA_MARK_0 set.
+ */
+static void cifs_clear_xarray_buffer(struct xarray *buffer)
+{
+	struct folio *folio;
+
+	XA_STATE(xas, buffer, 0);
+
+	rcu_read_lock();
+	xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) {
+		folio_put(folio);
+	}
+	rcu_read_unlock();
+	xa_destroy(buffer);
+}
+
+void
+smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
+{
+	int i;
+
+	for (i = 0; i < num_rqst; i++)
+		if (!xa_empty(&rqst[i].rq_buffer))
+			cifs_clear_xarray_buffer(&rqst[i].rq_buffer);
+}
+
+/*
+ * This function will initialize new_rq and encrypt the content.
+ * The first entry, new_rq[0], only contains a single iov which contains
+ * a smb2_transform_hdr and is pre-allocated by the caller.
+ * This function then populates new_rq[1+] with the content from olq_rq[0+].
+ *
+ * The end result is an array of smb_rqst structures where the first structure
+ * only contains a single iov for the transform header which we then can pass
+ * to crypt_message().
+ *
+ * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
+ * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
+ */
+static int
+smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
+		       struct smb_rqst *new_rq, struct smb_rqst *old_rq)
+{
+	struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
+	struct page *page;
+	unsigned int orig_len = 0;
+	int i, j;
+	int rc = -ENOMEM;
+
+	for (i = 1; i < num_rqst; i++) {
+		struct smb_rqst *old = &old_rq[i - 1];
+		struct smb_rqst *new = &new_rq[i];
+		struct xarray *buffer = &new->rq_buffer;
+		size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0;
+
+		orig_len += smb_rqst_len(server, old);
+		new->rq_iov = old->rq_iov;
+		new->rq_nvec = old->rq_nvec;
+
+		xa_init(buffer);
+
+		if (size > 0) {
+			unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE);
+
+			for (j = 0; j < npages; j++) {
+				void *o;
+
+				rc = -ENOMEM;
+				page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
+				if (!page)
+					goto err_free;
+				page->index = j;
+				o = xa_store(buffer, j, page, GFP_KERNEL);
+				if (xa_is_err(o)) {
+					rc = xa_err(o);
+					put_page(page);
+					goto err_free;
+				}
+
+				xa_set_mark(buffer, j, XA_MARK_0);
+
+				seg = min_t(size_t, size - copied, PAGE_SIZE);
+				if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) {
+					rc = -EFAULT;
+					goto err_free;
+				}
+				copied += seg;
+			}
+			iov_iter_xarray(&new->rq_iter, ITER_SOURCE,
+					buffer, 0, size);
+			new->rq_iter_size = size;
+		}
+	}
+
+	/* fill the 1st iov with a transform header */
+	fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
+
+	rc = crypt_message(server, num_rqst, new_rq, 1);
+	cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
+	if (rc)
+		goto err_free;
+
+	return rc;
+
+err_free:
+	smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
+	return rc;
+}
+
+static int
+smb3_is_transform_hdr(void *buf)
+{
+	struct smb2_transform_hdr *trhdr = buf;
+
+	return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
+}
+
+static int
+decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
+		 unsigned int buf_data_size, struct iov_iter *iter,
+		 bool is_offloaded)
+{
+	struct kvec iov[2];
+	struct smb_rqst rqst = {NULL};
+	size_t iter_size = 0;
+	int rc;
+
+	iov[0].iov_base = buf;
+	iov[0].iov_len = sizeof(struct smb2_transform_hdr);
+	iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
+	iov[1].iov_len = buf_data_size;
+
+	rqst.rq_iov = iov;
+	rqst.rq_nvec = 2;
+	if (iter) {
+		rqst.rq_iter = *iter;
+		rqst.rq_iter_size = iov_iter_count(iter);
+		iter_size = iov_iter_count(iter);
+	}
+
+	rc = crypt_message(server, 1, &rqst, 0);
+	cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
+
+	if (rc)
+		return rc;
+
+	memmove(buf, iov[1].iov_base, buf_data_size);
+
+	if (!is_offloaded)
+		server->total_read = buf_data_size + iter_size;
+
+	return rc;
+}
+
+static int
+cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size,
+			unsigned int skip, struct iov_iter *iter)
+{
+	struct page *page;
+	unsigned long index;
+
+	xa_for_each(pages, index, page) {
+		size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size);
+
+		n = copy_page_to_iter(page, skip, len, iter);
+		if (n != len) {
+			cifs_dbg(VFS, "%s: something went wrong\n", __func__);
+			return -EIO;
+		}
+		data_size -= n;
+		skip = 0;
+	}
+
+	return 0;
+}
+
+static int
+handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
+		 char *buf, unsigned int buf_len, struct xarray *pages,
+		 unsigned int pages_len, bool is_offloaded)
+{
+	unsigned int data_offset;
+	unsigned int data_len;
+	unsigned int cur_off;
+	unsigned int cur_page_idx;
+	unsigned int pad_len;
+	struct cifs_readdata *rdata = mid->callback_data;
+	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
+	int length;
+	bool use_rdma_mr = false;
+
+	if (shdr->Command != SMB2_READ) {
+		cifs_server_dbg(VFS, "only big read responses are supported\n");
+		return -EOPNOTSUPP;
+	}
+
+	if (server->ops->is_session_expired &&
+	    server->ops->is_session_expired(buf)) {
+		if (!is_offloaded)
+			cifs_reconnect(server, true);
+		return -1;
+	}
+
+	if (server->ops->is_status_pending &&
+			server->ops->is_status_pending(buf, server))
+		return -1;
+
+	/* set up first two iov to get credits */
+	rdata->iov[0].iov_base = buf;
+	rdata->iov[0].iov_len = 0;
+	rdata->iov[1].iov_base = buf;
+	rdata->iov[1].iov_len =
+		min_t(unsigned int, buf_len, server->vals->read_rsp_size);
+	cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
+		 rdata->iov[0].iov_base, rdata->iov[0].iov_len);
+	cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
+		 rdata->iov[1].iov_base, rdata->iov[1].iov_len);
+
+	rdata->result = server->ops->map_error(buf, true);
+	if (rdata->result != 0) {
+		cifs_dbg(FYI, "%s: server returned error %d\n",
+			 __func__, rdata->result);
+		/* normal error on read response */
+		if (is_offloaded)
+			mid->mid_state = MID_RESPONSE_RECEIVED;
+		else
+			dequeue_mid(mid, false);
+		return 0;
+	}
+
+	data_offset = server->ops->read_data_offset(buf);
+#ifdef CONFIG_CIFS_SMB_DIRECT
+	use_rdma_mr = rdata->mr;
+#endif
+	data_len = server->ops->read_data_length(buf, use_rdma_mr);
+
+	if (data_offset < server->vals->read_rsp_size) {
+		/*
+		 * win2k8 sometimes sends an offset of 0 when the read
+		 * is beyond the EOF. Treat it as if the data starts just after
+		 * the header.
+		 */
+		cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
+			 __func__, data_offset);
+		data_offset = server->vals->read_rsp_size;
+	} else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
+		/* data_offset is beyond the end of smallbuf */
+		cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
+			 __func__, data_offset);
+		rdata->result = -EIO;
+		if (is_offloaded)
+			mid->mid_state = MID_RESPONSE_MALFORMED;
+		else
+			dequeue_mid(mid, rdata->result);
+		return 0;
+	}
+
+	pad_len = data_offset - server->vals->read_rsp_size;
+
+	if (buf_len <= data_offset) {
+		/* read response payload is in pages */
+		cur_page_idx = pad_len / PAGE_SIZE;
+		cur_off = pad_len % PAGE_SIZE;
+
+		if (cur_page_idx != 0) {
+			/* data offset is beyond the 1st page of response */
+			cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
+				 __func__, data_offset);
+			rdata->result = -EIO;
+			if (is_offloaded)
+				mid->mid_state = MID_RESPONSE_MALFORMED;
+			else
+				dequeue_mid(mid, rdata->result);
+			return 0;
+		}
+
+		if (data_len > pages_len - pad_len) {
+			/* data_len is corrupt -- discard frame */
+			rdata->result = -EIO;
+			if (is_offloaded)
+				mid->mid_state = MID_RESPONSE_MALFORMED;
+			else
+				dequeue_mid(mid, rdata->result);
+			return 0;
+		}
+
+		/* Copy the data to the output I/O iterator. */
+		rdata->result = cifs_copy_pages_to_iter(pages, pages_len,
+							cur_off, &rdata->iter);
+		if (rdata->result != 0) {
+			if (is_offloaded)
+				mid->mid_state = MID_RESPONSE_MALFORMED;
+			else
+				dequeue_mid(mid, rdata->result);
+			return 0;
+		}
+		rdata->got_bytes = pages_len;
+
+	} else if (buf_len >= data_offset + data_len) {
+		/* read response payload is in buf */
+		WARN_ONCE(pages && !xa_empty(pages),
+			  "read data can be either in buf or in pages");
+		length = copy_to_iter(buf + data_offset, data_len, &rdata->iter);
+		if (length < 0)
+			return length;
+		rdata->got_bytes = data_len;
+	} else {
+		/* read response payload cannot be in both buf and pages */
+		WARN_ONCE(1, "buf can not contain only a part of read data");
+		rdata->result = -EIO;
+		if (is_offloaded)
+			mid->mid_state = MID_RESPONSE_MALFORMED;
+		else
+			dequeue_mid(mid, rdata->result);
+		return 0;
+	}
+
+	if (is_offloaded)
+		mid->mid_state = MID_RESPONSE_RECEIVED;
+	else
+		dequeue_mid(mid, false);
+	return 0;
+}
+
+struct smb2_decrypt_work {
+	struct work_struct decrypt;
+	struct TCP_Server_Info *server;
+	struct xarray buffer;
+	char *buf;
+	unsigned int len;
+};
+
+
+static void smb2_decrypt_offload(struct work_struct *work)
+{
+	struct smb2_decrypt_work *dw = container_of(work,
+				struct smb2_decrypt_work, decrypt);
+	int rc;
+	struct mid_q_entry *mid;
+	struct iov_iter iter;
+
+	iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len);
+	rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
+			      &iter, true);
+	if (rc) {
+		cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
+		goto free_pages;
+	}
+
+	dw->server->lstrp = jiffies;
+	mid = smb2_find_dequeue_mid(dw->server, dw->buf);
+	if (mid == NULL)
+		cifs_dbg(FYI, "mid not found\n");
+	else {
+		mid->decrypted = true;
+		rc = handle_read_data(dw->server, mid, dw->buf,
+				      dw->server->vals->read_rsp_size,
+				      &dw->buffer, dw->len,
+				      true);
+		if (rc >= 0) {
+#ifdef CONFIG_CIFS_STATS2
+			mid->when_received = jiffies;
+#endif
+			if (dw->server->ops->is_network_name_deleted)
+				dw->server->ops->is_network_name_deleted(dw->buf,
+									 dw->server);
+
+			mid->callback(mid);
+		} else {
+			spin_lock(&dw->server->srv_lock);
+			if (dw->server->tcpStatus == CifsNeedReconnect) {
+				spin_lock(&dw->server->mid_lock);
+				mid->mid_state = MID_RETRY_NEEDED;
+				spin_unlock(&dw->server->mid_lock);
+				spin_unlock(&dw->server->srv_lock);
+				mid->callback(mid);
+			} else {
+				spin_lock(&dw->server->mid_lock);
+				mid->mid_state = MID_REQUEST_SUBMITTED;
+				mid->mid_flags &= ~(MID_DELETED);
+				list_add_tail(&mid->qhead,
+					&dw->server->pending_mid_q);
+				spin_unlock(&dw->server->mid_lock);
+				spin_unlock(&dw->server->srv_lock);
+			}
+		}
+		release_mid(mid);
+	}
+
+free_pages:
+	cifs_clear_xarray_buffer(&dw->buffer);
+	cifs_small_buf_release(dw->buf);
+	kfree(dw);
+}
+
+
+static int
+receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
+		       int *num_mids)
+{
+	struct page *page;
+	char *buf = server->smallbuf;
+	struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
+	struct iov_iter iter;
+	unsigned int len, npages;
+	unsigned int buflen = server->pdu_size;
+	int rc;
+	int i = 0;
+	struct smb2_decrypt_work *dw;
+
+	dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
+	if (!dw)
+		return -ENOMEM;
+	xa_init(&dw->buffer);
+	INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
+	dw->server = server;
+
+	*num_mids = 1;
+	len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
+		sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
+
+	rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
+	if (rc < 0)
+		goto free_dw;
+	server->total_read += rc;
+
+	len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
+		server->vals->read_rsp_size;
+	dw->len = len;
+	npages = DIV_ROUND_UP(len, PAGE_SIZE);
+
+	rc = -ENOMEM;
+	for (; i < npages; i++) {
+		void *old;
+
+		page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
+		if (!page)
+			goto discard_data;
+		page->index = i;
+		old = xa_store(&dw->buffer, i, page, GFP_KERNEL);
+		if (xa_is_err(old)) {
+			rc = xa_err(old);
+			put_page(page);
+			goto discard_data;
+		}
+		xa_set_mark(&dw->buffer, i, XA_MARK_0);
+	}
+
+	iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE);
+
+	/* Read the data into the buffer and clear excess bufferage. */
+	rc = cifs_read_iter_from_socket(server, &iter, dw->len);
+	if (rc < 0)
+		goto discard_data;
+
+	server->total_read += rc;
+	if (rc < npages * PAGE_SIZE)
+		iov_iter_zero(npages * PAGE_SIZE - rc, &iter);
+	iov_iter_revert(&iter, npages * PAGE_SIZE);
+	iov_iter_truncate(&iter, dw->len);
+
+	rc = cifs_discard_remaining_data(server);
+	if (rc)
+		goto free_pages;
+
+	/*
+	 * For large reads, offload to different thread for better performance,
+	 * use more cores decrypting which can be expensive
+	 */
+
+	if ((server->min_offload) && (server->in_flight > 1) &&
+	    (server->pdu_size >= server->min_offload)) {
+		dw->buf = server->smallbuf;
+		server->smallbuf = (char *)cifs_small_buf_get();
+
+		queue_work(decrypt_wq, &dw->decrypt);
+		*num_mids = 0; /* worker thread takes care of finding mid */
+		return -1;
+	}
+
+	rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
+			      &iter, false);
+	if (rc)
+		goto free_pages;
+
+	*mid = smb2_find_mid(server, buf);
+	if (*mid == NULL) {
+		cifs_dbg(FYI, "mid not found\n");
+	} else {
+		cifs_dbg(FYI, "mid found\n");
+		(*mid)->decrypted = true;
+		rc = handle_read_data(server, *mid, buf,
+				      server->vals->read_rsp_size,
+				      &dw->buffer, dw->len, false);
+		if (rc >= 0) {
+			if (server->ops->is_network_name_deleted) {
+				server->ops->is_network_name_deleted(buf,
+								server);
+			}
+		}
+	}
+
+free_pages:
+	cifs_clear_xarray_buffer(&dw->buffer);
+free_dw:
+	kfree(dw);
+	return rc;
+discard_data:
+	cifs_discard_remaining_data(server);
+	goto free_pages;
+}
+
+static int
+receive_encrypted_standard(struct TCP_Server_Info *server,
+			   struct mid_q_entry **mids, char **bufs,
+			   int *num_mids)
+{
+	int ret, length;
+	char *buf = server->smallbuf;
+	struct smb2_hdr *shdr;
+	unsigned int pdu_length = server->pdu_size;
+	unsigned int buf_size;
+	unsigned int next_cmd;
+	struct mid_q_entry *mid_entry;
+	int next_is_large;
+	char *next_buffer = NULL;
+
+	*num_mids = 0;
+
+	/* switch to large buffer if too big for a small one */
+	if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
+		server->large_buf = true;
+		memcpy(server->bigbuf, buf, server->total_read);
+		buf = server->bigbuf;
+	}
+
+	/* now read the rest */
+	length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
+				pdu_length - HEADER_SIZE(server) + 1);
+	if (length < 0)
+		return length;
+	server->total_read += length;
+
+	buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
+	length = decrypt_raw_data(server, buf, buf_size, NULL, false);
+	if (length)
+		return length;
+
+	next_is_large = server->large_buf;
+one_more:
+	shdr = (struct smb2_hdr *)buf;
+	next_cmd = le32_to_cpu(shdr->NextCommand);
+	if (next_cmd) {
+		if (WARN_ON_ONCE(next_cmd > pdu_length))
+			return -1;
+		if (next_is_large)
+			next_buffer = (char *)cifs_buf_get();
+		else
+			next_buffer = (char *)cifs_small_buf_get();
+		memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd);
+	}
+
+	mid_entry = smb2_find_mid(server, buf);
+	if (mid_entry == NULL)
+		cifs_dbg(FYI, "mid not found\n");
+	else {
+		cifs_dbg(FYI, "mid found\n");
+		mid_entry->decrypted = true;
+		mid_entry->resp_buf_size = server->pdu_size;
+	}
+
+	if (*num_mids >= MAX_COMPOUND) {
+		cifs_server_dbg(VFS, "too many PDUs in compound\n");
+		return -1;
+	}
+	bufs[*num_mids] = buf;
+	mids[(*num_mids)++] = mid_entry;
+
+	if (mid_entry && mid_entry->handle)
+		ret = mid_entry->handle(server, mid_entry);
+	else
+		ret = cifs_handle_standard(server, mid_entry);
+
+	if (ret == 0 && next_cmd) {
+		pdu_length -= next_cmd;
+		server->large_buf = next_is_large;
+		if (next_is_large)
+			server->bigbuf = buf = next_buffer;
+		else
+			server->smallbuf = buf = next_buffer;
+		goto one_more;
+	} else if (ret != 0) {
+		/*
+		 * ret != 0 here means that we didn't get to handle_mid() thus
+		 * server->smallbuf and server->bigbuf are still valid. We need
+		 * to free next_buffer because it is not going to be used
+		 * anywhere.
+		 */
+		if (next_is_large)
+			free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
+		else
+			free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
+	}
+
+	return ret;
+}
+
+static int
+smb3_receive_transform(struct TCP_Server_Info *server,
+		       struct mid_q_entry **mids, char **bufs, int *num_mids)
+{
+	char *buf = server->smallbuf;
+	unsigned int pdu_length = server->pdu_size;
+	struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
+	unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
+
+	if (pdu_length < sizeof(struct smb2_transform_hdr) +
+						sizeof(struct smb2_hdr)) {
+		cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
+			 pdu_length);
+		cifs_reconnect(server, true);
+		return -ECONNABORTED;
+	}
+
+	if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
+		cifs_server_dbg(VFS, "Transform message is broken\n");
+		cifs_reconnect(server, true);
+		return -ECONNABORTED;
+	}
+
+	/* TODO: add support for compounds containing READ. */
+	if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
+		return receive_encrypted_read(server, &mids[0], num_mids);
+	}
+
+	return receive_encrypted_standard(server, mids, bufs, num_mids);
+}
+
+int
+smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
+{
+	char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
+
+	return handle_read_data(server, mid, buf, server->pdu_size,
+				NULL, 0, false);
+}
+
+static int smb2_next_header(struct TCP_Server_Info *server, char *buf,
+			    unsigned int *noff)
+{
+	struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
+	struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
+
+	if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
+		*noff = le32_to_cpu(t_hdr->OriginalMessageSize);
+		if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff)))
+			return -EINVAL;
+	} else {
+		*noff = le32_to_cpu(hdr->NextCommand);
+	}
+	if (unlikely(*noff && *noff < MID_HEADER_SIZE(server)))
+		return -EINVAL;
+	return 0;
+}
+
+static int
+smb2_make_node(unsigned int xid, struct inode *inode,
+	       struct dentry *dentry, struct cifs_tcon *tcon,
+	       const char *full_path, umode_t mode, dev_t dev)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	int rc = -EPERM;
+	struct cifs_open_info_data buf = {};
+	struct cifs_io_parms io_parms = {0};
+	__u32 oplock = 0;
+	struct cifs_fid fid;
+	struct cifs_open_parms oparms;
+	unsigned int bytes_written;
+	struct win_dev *pdev;
+	struct kvec iov[2];
+
+	/*
+	 * Check if mounted with mount parm 'sfu' mount parm.
+	 * SFU emulation should work with all servers, but only
+	 * supports block and char device (no socket & fifo),
+	 * and was used by default in earlier versions of Windows
+	 */
+	if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
+		return rc;
+
+	/*
+	 * TODO: Add ability to create instead via reparse point. Windows (e.g.
+	 * their current NFS server) uses this approach to expose special files
+	 * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
+	 */
+
+	if (!S_ISCHR(mode) && !S_ISBLK(mode) && !S_ISFIFO(mode))
+		return rc;
+
+	cifs_dbg(FYI, "sfu compat create special file\n");
+
+	oparms = (struct cifs_open_parms) {
+		.tcon = tcon,
+		.cifs_sb = cifs_sb,
+		.desired_access = GENERIC_WRITE,
+		.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
+						      CREATE_OPTION_SPECIAL),
+		.disposition = FILE_CREATE,
+		.path = full_path,
+		.fid = &fid,
+	};
+
+	if (tcon->ses->server->oplocks)
+		oplock = REQ_OPLOCK;
+	else
+		oplock = 0;
+	rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, &buf);
+	if (rc)
+		return rc;
+
+	/*
+	 * BB Do not bother to decode buf since no local inode yet to put
+	 * timestamps in, but we can reuse it safely.
+	 */
+
+	pdev = (struct win_dev *)&buf.fi;
+	io_parms.pid = current->tgid;
+	io_parms.tcon = tcon;
+	io_parms.offset = 0;
+	io_parms.length = sizeof(struct win_dev);
+	iov[1].iov_base = &buf.fi;
+	iov[1].iov_len = sizeof(struct win_dev);
+	if (S_ISCHR(mode)) {
+		memcpy(pdev->type, "IntxCHR", 8);
+		pdev->major = cpu_to_le64(MAJOR(dev));
+		pdev->minor = cpu_to_le64(MINOR(dev));
+		rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
+							&bytes_written, iov, 1);
+	} else if (S_ISBLK(mode)) {
+		memcpy(pdev->type, "IntxBLK", 8);
+		pdev->major = cpu_to_le64(MAJOR(dev));
+		pdev->minor = cpu_to_le64(MINOR(dev));
+		rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
+							&bytes_written, iov, 1);
+	} else if (S_ISFIFO(mode)) {
+		memcpy(pdev->type, "LnxFIFO", 8);
+		pdev->major = 0;
+		pdev->minor = 0;
+		rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
+							&bytes_written, iov, 1);
+	}
+	tcon->ses->server->ops->close(xid, tcon, &fid);
+	d_drop(dentry);
+
+	/* FIXME: add code here to set EAs */
+
+	cifs_free_open_info(&buf);
+	return rc;
+}
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+struct smb_version_operations smb20_operations = {
+	.compare_fids = smb2_compare_fids,
+	.setup_request = smb2_setup_request,
+	.setup_async_request = smb2_setup_async_request,
+	.check_receive = smb2_check_receive,
+	.add_credits = smb2_add_credits,
+	.set_credits = smb2_set_credits,
+	.get_credits_field = smb2_get_credits_field,
+	.get_credits = smb2_get_credits,
+	.wait_mtu_credits = cifs_wait_mtu_credits,
+	.get_next_mid = smb2_get_next_mid,
+	.revert_current_mid = smb2_revert_current_mid,
+	.read_data_offset = smb2_read_data_offset,
+	.read_data_length = smb2_read_data_length,
+	.map_error = map_smb2_to_linux_error,
+	.find_mid = smb2_find_mid,
+	.check_message = smb2_check_message,
+	.dump_detail = smb2_dump_detail,
+	.clear_stats = smb2_clear_stats,
+	.print_stats = smb2_print_stats,
+	.is_oplock_break = smb2_is_valid_oplock_break,
+	.handle_cancelled_mid = smb2_handle_cancelled_mid,
+	.downgrade_oplock = smb2_downgrade_oplock,
+	.need_neg = smb2_need_neg,
+	.negotiate = smb2_negotiate,
+	.negotiate_wsize = smb2_negotiate_wsize,
+	.negotiate_rsize = smb2_negotiate_rsize,
+	.sess_setup = SMB2_sess_setup,
+	.logoff = SMB2_logoff,
+	.tree_connect = SMB2_tcon,
+	.tree_disconnect = SMB2_tdis,
+	.qfs_tcon = smb2_qfs_tcon,
+	.is_path_accessible = smb2_is_path_accessible,
+	.can_echo = smb2_can_echo,
+	.echo = SMB2_echo,
+	.query_path_info = smb2_query_path_info,
+	.query_reparse_point = smb2_query_reparse_point,
+	.get_srv_inum = smb2_get_srv_inum,
+	.query_file_info = smb2_query_file_info,
+	.set_path_size = smb2_set_path_size,
+	.set_file_size = smb2_set_file_size,
+	.set_file_info = smb2_set_file_info,
+	.set_compression = smb2_set_compression,
+	.mkdir = smb2_mkdir,
+	.mkdir_setinfo = smb2_mkdir_setinfo,
+	.rmdir = smb2_rmdir,
+	.unlink = smb2_unlink,
+	.rename = smb2_rename_path,
+	.create_hardlink = smb2_create_hardlink,
+	.parse_reparse_point = smb2_parse_reparse_point,
+	.query_mf_symlink = smb3_query_mf_symlink,
+	.create_mf_symlink = smb3_create_mf_symlink,
+	.open = smb2_open_file,
+	.set_fid = smb2_set_fid,
+	.close = smb2_close_file,
+	.flush = smb2_flush_file,
+	.async_readv = smb2_async_readv,
+	.async_writev = smb2_async_writev,
+	.sync_read = smb2_sync_read,
+	.sync_write = smb2_sync_write,
+	.query_dir_first = smb2_query_dir_first,
+	.query_dir_next = smb2_query_dir_next,
+	.close_dir = smb2_close_dir,
+	.calc_smb_size = smb2_calc_size,
+	.is_status_pending = smb2_is_status_pending,
+	.is_session_expired = smb2_is_session_expired,
+	.oplock_response = smb2_oplock_response,
+	.queryfs = smb2_queryfs,
+	.mand_lock = smb2_mand_lock,
+	.mand_unlock_range = smb2_unlock_range,
+	.push_mand_locks = smb2_push_mandatory_locks,
+	.get_lease_key = smb2_get_lease_key,
+	.set_lease_key = smb2_set_lease_key,
+	.new_lease_key = smb2_new_lease_key,
+	.calc_signature = smb2_calc_signature,
+	.is_read_op = smb2_is_read_op,
+	.set_oplock_level = smb2_set_oplock_level,
+	.create_lease_buf = smb2_create_lease_buf,
+	.parse_lease_buf = smb2_parse_lease_buf,
+	.copychunk_range = smb2_copychunk_range,
+	.wp_retry_size = smb2_wp_retry_size,
+	.dir_needs_close = smb2_dir_needs_close,
+	.get_dfs_refer = smb2_get_dfs_refer,
+	.select_sectype = smb2_select_sectype,
+#ifdef CONFIG_CIFS_XATTR
+	.query_all_EAs = smb2_query_eas,
+	.set_EA = smb2_set_ea,
+#endif /* CIFS_XATTR */
+	.get_acl = get_smb2_acl,
+	.get_acl_by_fid = get_smb2_acl_by_fid,
+	.set_acl = set_smb2_acl,
+	.next_header = smb2_next_header,
+	.ioctl_query_info = smb2_ioctl_query_info,
+	.make_node = smb2_make_node,
+	.fiemap = smb3_fiemap,
+	.llseek = smb3_llseek,
+	.is_status_io_timeout = smb2_is_status_io_timeout,
+	.is_network_name_deleted = smb2_is_network_name_deleted,
+};
+#endif /* CIFS_ALLOW_INSECURE_LEGACY */
+
+struct smb_version_operations smb21_operations = {
+	.compare_fids = smb2_compare_fids,
+	.setup_request = smb2_setup_request,
+	.setup_async_request = smb2_setup_async_request,
+	.check_receive = smb2_check_receive,
+	.add_credits = smb2_add_credits,
+	.set_credits = smb2_set_credits,
+	.get_credits_field = smb2_get_credits_field,
+	.get_credits = smb2_get_credits,
+	.wait_mtu_credits = smb2_wait_mtu_credits,
+	.adjust_credits = smb2_adjust_credits,
+	.get_next_mid = smb2_get_next_mid,
+	.revert_current_mid = smb2_revert_current_mid,
+	.read_data_offset = smb2_read_data_offset,
+	.read_data_length = smb2_read_data_length,
+	.map_error = map_smb2_to_linux_error,
+	.find_mid = smb2_find_mid,
+	.check_message = smb2_check_message,
+	.dump_detail = smb2_dump_detail,
+	.clear_stats = smb2_clear_stats,
+	.print_stats = smb2_print_stats,
+	.is_oplock_break = smb2_is_valid_oplock_break,
+	.handle_cancelled_mid = smb2_handle_cancelled_mid,
+	.downgrade_oplock = smb2_downgrade_oplock,
+	.need_neg = smb2_need_neg,
+	.negotiate = smb2_negotiate,
+	.negotiate_wsize = smb2_negotiate_wsize,
+	.negotiate_rsize = smb2_negotiate_rsize,
+	.sess_setup = SMB2_sess_setup,
+	.logoff = SMB2_logoff,
+	.tree_connect = SMB2_tcon,
+	.tree_disconnect = SMB2_tdis,
+	.qfs_tcon = smb2_qfs_tcon,
+	.is_path_accessible = smb2_is_path_accessible,
+	.can_echo = smb2_can_echo,
+	.echo = SMB2_echo,
+	.query_path_info = smb2_query_path_info,
+	.query_reparse_point = smb2_query_reparse_point,
+	.get_srv_inum = smb2_get_srv_inum,
+	.query_file_info = smb2_query_file_info,
+	.set_path_size = smb2_set_path_size,
+	.set_file_size = smb2_set_file_size,
+	.set_file_info = smb2_set_file_info,
+	.set_compression = smb2_set_compression,
+	.mkdir = smb2_mkdir,
+	.mkdir_setinfo = smb2_mkdir_setinfo,
+	.rmdir = smb2_rmdir,
+	.unlink = smb2_unlink,
+	.rename = smb2_rename_path,
+	.create_hardlink = smb2_create_hardlink,
+	.parse_reparse_point = smb2_parse_reparse_point,
+	.query_mf_symlink = smb3_query_mf_symlink,
+	.create_mf_symlink = smb3_create_mf_symlink,
+	.open = smb2_open_file,
+	.set_fid = smb2_set_fid,
+	.close = smb2_close_file,
+	.flush = smb2_flush_file,
+	.async_readv = smb2_async_readv,
+	.async_writev = smb2_async_writev,
+	.sync_read = smb2_sync_read,
+	.sync_write = smb2_sync_write,
+	.query_dir_first = smb2_query_dir_first,
+	.query_dir_next = smb2_query_dir_next,
+	.close_dir = smb2_close_dir,
+	.calc_smb_size = smb2_calc_size,
+	.is_status_pending = smb2_is_status_pending,
+	.is_session_expired = smb2_is_session_expired,
+	.oplock_response = smb2_oplock_response,
+	.queryfs = smb2_queryfs,
+	.mand_lock = smb2_mand_lock,
+	.mand_unlock_range = smb2_unlock_range,
+	.push_mand_locks = smb2_push_mandatory_locks,
+	.get_lease_key = smb2_get_lease_key,
+	.set_lease_key = smb2_set_lease_key,
+	.new_lease_key = smb2_new_lease_key,
+	.calc_signature = smb2_calc_signature,
+	.is_read_op = smb21_is_read_op,
+	.set_oplock_level = smb21_set_oplock_level,
+	.create_lease_buf = smb2_create_lease_buf,
+	.parse_lease_buf = smb2_parse_lease_buf,
+	.copychunk_range = smb2_copychunk_range,
+	.wp_retry_size = smb2_wp_retry_size,
+	.dir_needs_close = smb2_dir_needs_close,
+	.enum_snapshots = smb3_enum_snapshots,
+	.notify = smb3_notify,
+	.get_dfs_refer = smb2_get_dfs_refer,
+	.select_sectype = smb2_select_sectype,
+#ifdef CONFIG_CIFS_XATTR
+	.query_all_EAs = smb2_query_eas,
+	.set_EA = smb2_set_ea,
+#endif /* CIFS_XATTR */
+	.get_acl = get_smb2_acl,
+	.get_acl_by_fid = get_smb2_acl_by_fid,
+	.set_acl = set_smb2_acl,
+	.next_header = smb2_next_header,
+	.ioctl_query_info = smb2_ioctl_query_info,
+	.make_node = smb2_make_node,
+	.fiemap = smb3_fiemap,
+	.llseek = smb3_llseek,
+	.is_status_io_timeout = smb2_is_status_io_timeout,
+	.is_network_name_deleted = smb2_is_network_name_deleted,
+};
+
+struct smb_version_operations smb30_operations = {
+	.compare_fids = smb2_compare_fids,
+	.setup_request = smb2_setup_request,
+	.setup_async_request = smb2_setup_async_request,
+	.check_receive = smb2_check_receive,
+	.add_credits = smb2_add_credits,
+	.set_credits = smb2_set_credits,
+	.get_credits_field = smb2_get_credits_field,
+	.get_credits = smb2_get_credits,
+	.wait_mtu_credits = smb2_wait_mtu_credits,
+	.adjust_credits = smb2_adjust_credits,
+	.get_next_mid = smb2_get_next_mid,
+	.revert_current_mid = smb2_revert_current_mid,
+	.read_data_offset = smb2_read_data_offset,
+	.read_data_length = smb2_read_data_length,
+	.map_error = map_smb2_to_linux_error,
+	.find_mid = smb2_find_mid,
+	.check_message = smb2_check_message,
+	.dump_detail = smb2_dump_detail,
+	.clear_stats = smb2_clear_stats,
+	.print_stats = smb2_print_stats,
+	.dump_share_caps = smb2_dump_share_caps,
+	.is_oplock_break = smb2_is_valid_oplock_break,
+	.handle_cancelled_mid = smb2_handle_cancelled_mid,
+	.downgrade_oplock = smb3_downgrade_oplock,
+	.need_neg = smb2_need_neg,
+	.negotiate = smb2_negotiate,
+	.negotiate_wsize = smb3_negotiate_wsize,
+	.negotiate_rsize = smb3_negotiate_rsize,
+	.sess_setup = SMB2_sess_setup,
+	.logoff = SMB2_logoff,
+	.tree_connect = SMB2_tcon,
+	.tree_disconnect = SMB2_tdis,
+	.qfs_tcon = smb3_qfs_tcon,
+	.is_path_accessible = smb2_is_path_accessible,
+	.can_echo = smb2_can_echo,
+	.echo = SMB2_echo,
+	.query_path_info = smb2_query_path_info,
+	/* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
+	.query_reparse_point = smb2_query_reparse_point,
+	.get_srv_inum = smb2_get_srv_inum,
+	.query_file_info = smb2_query_file_info,
+	.set_path_size = smb2_set_path_size,
+	.set_file_size = smb2_set_file_size,
+	.set_file_info = smb2_set_file_info,
+	.set_compression = smb2_set_compression,
+	.mkdir = smb2_mkdir,
+	.mkdir_setinfo = smb2_mkdir_setinfo,
+	.rmdir = smb2_rmdir,
+	.unlink = smb2_unlink,
+	.rename = smb2_rename_path,
+	.create_hardlink = smb2_create_hardlink,
+	.parse_reparse_point = smb2_parse_reparse_point,
+	.query_mf_symlink = smb3_query_mf_symlink,
+	.create_mf_symlink = smb3_create_mf_symlink,
+	.open = smb2_open_file,
+	.set_fid = smb2_set_fid,
+	.close = smb2_close_file,
+	.close_getattr = smb2_close_getattr,
+	.flush = smb2_flush_file,
+	.async_readv = smb2_async_readv,
+	.async_writev = smb2_async_writev,
+	.sync_read = smb2_sync_read,
+	.sync_write = smb2_sync_write,
+	.query_dir_first = smb2_query_dir_first,
+	.query_dir_next = smb2_query_dir_next,
+	.close_dir = smb2_close_dir,
+	.calc_smb_size = smb2_calc_size,
+	.is_status_pending = smb2_is_status_pending,
+	.is_session_expired = smb2_is_session_expired,
+	.oplock_response = smb2_oplock_response,
+	.queryfs = smb2_queryfs,
+	.mand_lock = smb2_mand_lock,
+	.mand_unlock_range = smb2_unlock_range,
+	.push_mand_locks = smb2_push_mandatory_locks,
+	.get_lease_key = smb2_get_lease_key,
+	.set_lease_key = smb2_set_lease_key,
+	.new_lease_key = smb2_new_lease_key,
+	.generate_signingkey = generate_smb30signingkey,
+	.calc_signature = smb3_calc_signature,
+	.set_integrity  = smb3_set_integrity,
+	.is_read_op = smb21_is_read_op,
+	.set_oplock_level = smb3_set_oplock_level,
+	.create_lease_buf = smb3_create_lease_buf,
+	.parse_lease_buf = smb3_parse_lease_buf,
+	.copychunk_range = smb2_copychunk_range,
+	.duplicate_extents = smb2_duplicate_extents,
+	.validate_negotiate = smb3_validate_negotiate,
+	.wp_retry_size = smb2_wp_retry_size,
+	.dir_needs_close = smb2_dir_needs_close,
+	.fallocate = smb3_fallocate,
+	.enum_snapshots = smb3_enum_snapshots,
+	.notify = smb3_notify,
+	.init_transform_rq = smb3_init_transform_rq,
+	.is_transform_hdr = smb3_is_transform_hdr,
+	.receive_transform = smb3_receive_transform,
+	.get_dfs_refer = smb2_get_dfs_refer,
+	.select_sectype = smb2_select_sectype,
+#ifdef CONFIG_CIFS_XATTR
+	.query_all_EAs = smb2_query_eas,
+	.set_EA = smb2_set_ea,
+#endif /* CIFS_XATTR */
+	.get_acl = get_smb2_acl,
+	.get_acl_by_fid = get_smb2_acl_by_fid,
+	.set_acl = set_smb2_acl,
+	.next_header = smb2_next_header,
+	.ioctl_query_info = smb2_ioctl_query_info,
+	.make_node = smb2_make_node,
+	.fiemap = smb3_fiemap,
+	.llseek = smb3_llseek,
+	.is_status_io_timeout = smb2_is_status_io_timeout,
+	.is_network_name_deleted = smb2_is_network_name_deleted,
+};
+
+struct smb_version_operations smb311_operations = {
+	.compare_fids = smb2_compare_fids,
+	.setup_request = smb2_setup_request,
+	.setup_async_request = smb2_setup_async_request,
+	.check_receive = smb2_check_receive,
+	.add_credits = smb2_add_credits,
+	.set_credits = smb2_set_credits,
+	.get_credits_field = smb2_get_credits_field,
+	.get_credits = smb2_get_credits,
+	.wait_mtu_credits = smb2_wait_mtu_credits,
+	.adjust_credits = smb2_adjust_credits,
+	.get_next_mid = smb2_get_next_mid,
+	.revert_current_mid = smb2_revert_current_mid,
+	.read_data_offset = smb2_read_data_offset,
+	.read_data_length = smb2_read_data_length,
+	.map_error = map_smb2_to_linux_error,
+	.find_mid = smb2_find_mid,
+	.check_message = smb2_check_message,
+	.dump_detail = smb2_dump_detail,
+	.clear_stats = smb2_clear_stats,
+	.print_stats = smb2_print_stats,
+	.dump_share_caps = smb2_dump_share_caps,
+	.is_oplock_break = smb2_is_valid_oplock_break,
+	.handle_cancelled_mid = smb2_handle_cancelled_mid,
+	.downgrade_oplock = smb3_downgrade_oplock,
+	.need_neg = smb2_need_neg,
+	.negotiate = smb2_negotiate,
+	.negotiate_wsize = smb3_negotiate_wsize,
+	.negotiate_rsize = smb3_negotiate_rsize,
+	.sess_setup = SMB2_sess_setup,
+	.logoff = SMB2_logoff,
+	.tree_connect = SMB2_tcon,
+	.tree_disconnect = SMB2_tdis,
+	.qfs_tcon = smb3_qfs_tcon,
+	.is_path_accessible = smb2_is_path_accessible,
+	.can_echo = smb2_can_echo,
+	.echo = SMB2_echo,
+	.query_path_info = smb2_query_path_info,
+	.query_reparse_point = smb2_query_reparse_point,
+	.get_srv_inum = smb2_get_srv_inum,
+	.query_file_info = smb2_query_file_info,
+	.set_path_size = smb2_set_path_size,
+	.set_file_size = smb2_set_file_size,
+	.set_file_info = smb2_set_file_info,
+	.set_compression = smb2_set_compression,
+	.mkdir = smb2_mkdir,
+	.mkdir_setinfo = smb2_mkdir_setinfo,
+	.posix_mkdir = smb311_posix_mkdir,
+	.rmdir = smb2_rmdir,
+	.unlink = smb2_unlink,
+	.rename = smb2_rename_path,
+	.create_hardlink = smb2_create_hardlink,
+	.parse_reparse_point = smb2_parse_reparse_point,
+	.query_mf_symlink = smb3_query_mf_symlink,
+	.create_mf_symlink = smb3_create_mf_symlink,
+	.open = smb2_open_file,
+	.set_fid = smb2_set_fid,
+	.close = smb2_close_file,
+	.close_getattr = smb2_close_getattr,
+	.flush = smb2_flush_file,
+	.async_readv = smb2_async_readv,
+	.async_writev = smb2_async_writev,
+	.sync_read = smb2_sync_read,
+	.sync_write = smb2_sync_write,
+	.query_dir_first = smb2_query_dir_first,
+	.query_dir_next = smb2_query_dir_next,
+	.close_dir = smb2_close_dir,
+	.calc_smb_size = smb2_calc_size,
+	.is_status_pending = smb2_is_status_pending,
+	.is_session_expired = smb2_is_session_expired,
+	.oplock_response = smb2_oplock_response,
+	.queryfs = smb311_queryfs,
+	.mand_lock = smb2_mand_lock,
+	.mand_unlock_range = smb2_unlock_range,
+	.push_mand_locks = smb2_push_mandatory_locks,
+	.get_lease_key = smb2_get_lease_key,
+	.set_lease_key = smb2_set_lease_key,
+	.new_lease_key = smb2_new_lease_key,
+	.generate_signingkey = generate_smb311signingkey,
+	.calc_signature = smb3_calc_signature,
+	.set_integrity  = smb3_set_integrity,
+	.is_read_op = smb21_is_read_op,
+	.set_oplock_level = smb3_set_oplock_level,
+	.create_lease_buf = smb3_create_lease_buf,
+	.parse_lease_buf = smb3_parse_lease_buf,
+	.copychunk_range = smb2_copychunk_range,
+	.duplicate_extents = smb2_duplicate_extents,
+/*	.validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
+	.wp_retry_size = smb2_wp_retry_size,
+	.dir_needs_close = smb2_dir_needs_close,
+	.fallocate = smb3_fallocate,
+	.enum_snapshots = smb3_enum_snapshots,
+	.notify = smb3_notify,
+	.init_transform_rq = smb3_init_transform_rq,
+	.is_transform_hdr = smb3_is_transform_hdr,
+	.receive_transform = smb3_receive_transform,
+	.get_dfs_refer = smb2_get_dfs_refer,
+	.select_sectype = smb2_select_sectype,
+#ifdef CONFIG_CIFS_XATTR
+	.query_all_EAs = smb2_query_eas,
+	.set_EA = smb2_set_ea,
+#endif /* CIFS_XATTR */
+	.get_acl = get_smb2_acl,
+	.get_acl_by_fid = get_smb2_acl_by_fid,
+	.set_acl = set_smb2_acl,
+	.next_header = smb2_next_header,
+	.ioctl_query_info = smb2_ioctl_query_info,
+	.make_node = smb2_make_node,
+	.fiemap = smb3_fiemap,
+	.llseek = smb3_llseek,
+	.is_status_io_timeout = smb2_is_status_io_timeout,
+	.is_network_name_deleted = smb2_is_network_name_deleted,
+};
+
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
+struct smb_version_values smb20_values = {
+	.version_string = SMB20_VERSION_STRING,
+	.protocol_id = SMB20_PROT_ID,
+	.req_capabilities = 0, /* MBZ */
+	.large_lock_type = 0,
+	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
+	.shared_lock_type = SMB2_LOCKFLAG_SHARED,
+	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
+	.header_size = sizeof(struct smb2_hdr),
+	.header_preamble_size = 0,
+	.max_header_size = MAX_SMB2_HDR_SIZE,
+	.read_rsp_size = sizeof(struct smb2_read_rsp),
+	.lock_cmd = SMB2_LOCK,
+	.cap_unix = 0,
+	.cap_nt_find = SMB2_NT_FIND,
+	.cap_large_files = SMB2_LARGE_FILES,
+	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
+	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
+	.create_lease_size = sizeof(struct create_lease),
+};
+#endif /* ALLOW_INSECURE_LEGACY */
+
+struct smb_version_values smb21_values = {
+	.version_string = SMB21_VERSION_STRING,
+	.protocol_id = SMB21_PROT_ID,
+	.req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
+	.large_lock_type = 0,
+	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
+	.shared_lock_type = SMB2_LOCKFLAG_SHARED,
+	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
+	.header_size = sizeof(struct smb2_hdr),
+	.header_preamble_size = 0,
+	.max_header_size = MAX_SMB2_HDR_SIZE,
+	.read_rsp_size = sizeof(struct smb2_read_rsp),
+	.lock_cmd = SMB2_LOCK,
+	.cap_unix = 0,
+	.cap_nt_find = SMB2_NT_FIND,
+	.cap_large_files = SMB2_LARGE_FILES,
+	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
+	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
+	.create_lease_size = sizeof(struct create_lease),
+};
+
+struct smb_version_values smb3any_values = {
+	.version_string = SMB3ANY_VERSION_STRING,
+	.protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
+	.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
+	.large_lock_type = 0,
+	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
+	.shared_lock_type = SMB2_LOCKFLAG_SHARED,
+	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
+	.header_size = sizeof(struct smb2_hdr),
+	.header_preamble_size = 0,
+	.max_header_size = MAX_SMB2_HDR_SIZE,
+	.read_rsp_size = sizeof(struct smb2_read_rsp),
+	.lock_cmd = SMB2_LOCK,
+	.cap_unix = 0,
+	.cap_nt_find = SMB2_NT_FIND,
+	.cap_large_files = SMB2_LARGE_FILES,
+	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
+	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
+	.create_lease_size = sizeof(struct create_lease_v2),
+};
+
+struct smb_version_values smbdefault_values = {
+	.version_string = SMBDEFAULT_VERSION_STRING,
+	.protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
+	.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
+	.large_lock_type = 0,
+	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
+	.shared_lock_type = SMB2_LOCKFLAG_SHARED,
+	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
+	.header_size = sizeof(struct smb2_hdr),
+	.header_preamble_size = 0,
+	.max_header_size = MAX_SMB2_HDR_SIZE,
+	.read_rsp_size = sizeof(struct smb2_read_rsp),
+	.lock_cmd = SMB2_LOCK,
+	.cap_unix = 0,
+	.cap_nt_find = SMB2_NT_FIND,
+	.cap_large_files = SMB2_LARGE_FILES,
+	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
+	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
+	.create_lease_size = sizeof(struct create_lease_v2),
+};
+
+struct smb_version_values smb30_values = {
+	.version_string = SMB30_VERSION_STRING,
+	.protocol_id = SMB30_PROT_ID,
+	.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
+	.large_lock_type = 0,
+	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
+	.shared_lock_type = SMB2_LOCKFLAG_SHARED,
+	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
+	.header_size = sizeof(struct smb2_hdr),
+	.header_preamble_size = 0,
+	.max_header_size = MAX_SMB2_HDR_SIZE,
+	.read_rsp_size = sizeof(struct smb2_read_rsp),
+	.lock_cmd = SMB2_LOCK,
+	.cap_unix = 0,
+	.cap_nt_find = SMB2_NT_FIND,
+	.cap_large_files = SMB2_LARGE_FILES,
+	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
+	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
+	.create_lease_size = sizeof(struct create_lease_v2),
+};
+
+struct smb_version_values smb302_values = {
+	.version_string = SMB302_VERSION_STRING,
+	.protocol_id = SMB302_PROT_ID,
+	.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
+	.large_lock_type = 0,
+	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
+	.shared_lock_type = SMB2_LOCKFLAG_SHARED,
+	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
+	.header_size = sizeof(struct smb2_hdr),
+	.header_preamble_size = 0,
+	.max_header_size = MAX_SMB2_HDR_SIZE,
+	.read_rsp_size = sizeof(struct smb2_read_rsp),
+	.lock_cmd = SMB2_LOCK,
+	.cap_unix = 0,
+	.cap_nt_find = SMB2_NT_FIND,
+	.cap_large_files = SMB2_LARGE_FILES,
+	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
+	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
+	.create_lease_size = sizeof(struct create_lease_v2),
+};
+
+struct smb_version_values smb311_values = {
+	.version_string = SMB311_VERSION_STRING,
+	.protocol_id = SMB311_PROT_ID,
+	.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
+	.large_lock_type = 0,
+	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
+	.shared_lock_type = SMB2_LOCKFLAG_SHARED,
+	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
+	.header_size = sizeof(struct smb2_hdr),
+	.header_preamble_size = 0,
+	.max_header_size = MAX_SMB2_HDR_SIZE,
+	.read_rsp_size = sizeof(struct smb2_read_rsp),
+	.lock_cmd = SMB2_LOCK,
+	.cap_unix = 0,
+	.cap_nt_find = SMB2_NT_FIND,
+	.cap_large_files = SMB2_LARGE_FILES,
+	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
+	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
+	.create_lease_size = sizeof(struct create_lease_v2),
+};
diff --git a/fs/smb/client/smb2pdu.c b/fs/smb/client/smb2pdu.c
new file mode 100644
index 0000000000..f5006aa97f
--- /dev/null
+++ b/fs/smb/client/smb2pdu.c
@@ -0,0 +1,5859 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *
+ *   Copyright (C) International Business Machines  Corp., 2009, 2013
+ *                 Etersoft, 2012
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *              Pavel Shilovsky (pshilovsky@samba.org) 2012
+ *
+ *   Contains the routines for constructing the SMB2 PDUs themselves
+ *
+ */
+
+ /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
+ /* Note that there are handle based routines which must be		      */
+ /* treated slightly differently for reconnection purposes since we never     */
+ /* want to reuse a stale file handle and only the caller knows the file info */
+
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/vfs.h>
+#include <linux/task_io_accounting_ops.h>
+#include <linux/uaccess.h>
+#include <linux/uuid.h>
+#include <linux/pagemap.h>
+#include <linux/xattr.h>
+#include "cifsglob.h"
+#include "cifsacl.h"
+#include "cifsproto.h"
+#include "smb2proto.h"
+#include "cifs_unicode.h"
+#include "cifs_debug.h"
+#include "ntlmssp.h"
+#include "smb2status.h"
+#include "smb2glob.h"
+#include "cifspdu.h"
+#include "cifs_spnego.h"
+#include "smbdirect.h"
+#include "trace.h"
+#ifdef CONFIG_CIFS_DFS_UPCALL
+#include "dfs_cache.h"
+#endif
+#include "cached_dir.h"
+
+/*
+ *  The following table defines the expected "StructureSize" of SMB2 requests
+ *  in order by SMB2 command.  This is similar to "wct" in SMB/CIFS requests.
+ *
+ *  Note that commands are defined in smb2pdu.h in le16 but the array below is
+ *  indexed by command in host byte order.
+ */
+static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
+	/* SMB2_NEGOTIATE */ 36,
+	/* SMB2_SESSION_SETUP */ 25,
+	/* SMB2_LOGOFF */ 4,
+	/* SMB2_TREE_CONNECT */	9,
+	/* SMB2_TREE_DISCONNECT */ 4,
+	/* SMB2_CREATE */ 57,
+	/* SMB2_CLOSE */ 24,
+	/* SMB2_FLUSH */ 24,
+	/* SMB2_READ */	49,
+	/* SMB2_WRITE */ 49,
+	/* SMB2_LOCK */	48,
+	/* SMB2_IOCTL */ 57,
+	/* SMB2_CANCEL */ 4,
+	/* SMB2_ECHO */ 4,
+	/* SMB2_QUERY_DIRECTORY */ 33,
+	/* SMB2_CHANGE_NOTIFY */ 32,
+	/* SMB2_QUERY_INFO */ 41,
+	/* SMB2_SET_INFO */ 33,
+	/* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
+};
+
+int smb3_encryption_required(const struct cifs_tcon *tcon)
+{
+	if (!tcon || !tcon->ses)
+		return 0;
+	if ((tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
+	    (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
+		return 1;
+	if (tcon->seal &&
+	    (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
+		return 1;
+	return 0;
+}
+
+static void
+smb2_hdr_assemble(struct smb2_hdr *shdr, __le16 smb2_cmd,
+		  const struct cifs_tcon *tcon,
+		  struct TCP_Server_Info *server)
+{
+	struct smb3_hdr_req *smb3_hdr;
+
+	shdr->ProtocolId = SMB2_PROTO_NUMBER;
+	shdr->StructureSize = cpu_to_le16(64);
+	shdr->Command = smb2_cmd;
+
+	if (server) {
+		/* After reconnect SMB3 must set ChannelSequence on subsequent reqs */
+		if (server->dialect >= SMB30_PROT_ID) {
+			smb3_hdr = (struct smb3_hdr_req *)shdr;
+			/*
+			 * if primary channel is not set yet, use default
+			 * channel for chan sequence num
+			 */
+			if (SERVER_IS_CHAN(server))
+				smb3_hdr->ChannelSequence =
+					cpu_to_le16(server->primary_server->channel_sequence_num);
+			else
+				smb3_hdr->ChannelSequence =
+					cpu_to_le16(server->channel_sequence_num);
+		}
+		spin_lock(&server->req_lock);
+		/* Request up to 10 credits but don't go over the limit. */
+		if (server->credits >= server->max_credits)
+			shdr->CreditRequest = cpu_to_le16(0);
+		else
+			shdr->CreditRequest = cpu_to_le16(
+				min_t(int, server->max_credits -
+						server->credits, 10));
+		spin_unlock(&server->req_lock);
+	} else {
+		shdr->CreditRequest = cpu_to_le16(2);
+	}
+	shdr->Id.SyncId.ProcessId = cpu_to_le32((__u16)current->tgid);
+
+	if (!tcon)
+		goto out;
+
+	/* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
+	/* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
+	if (server && (server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
+		shdr->CreditCharge = cpu_to_le16(1);
+	/* else CreditCharge MBZ */
+
+	shdr->Id.SyncId.TreeId = cpu_to_le32(tcon->tid);
+	/* Uid is not converted */
+	if (tcon->ses)
+		shdr->SessionId = cpu_to_le64(tcon->ses->Suid);
+
+	/*
+	 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
+	 * to pass the path on the Open SMB prefixed by \\server\share.
+	 * Not sure when we would need to do the augmented path (if ever) and
+	 * setting this flag breaks the SMB2 open operation since it is
+	 * illegal to send an empty path name (without \\server\share prefix)
+	 * when the DFS flag is set in the SMB open header. We could
+	 * consider setting the flag on all operations other than open
+	 * but it is safer to net set it for now.
+	 */
+/*	if (tcon->share_flags & SHI1005_FLAGS_DFS)
+		shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
+
+	if (server && server->sign && !smb3_encryption_required(tcon))
+		shdr->Flags |= SMB2_FLAGS_SIGNED;
+out:
+	return;
+}
+
+/* helper function for code reuse */
+static int
+cifs_chan_skip_or_disable(struct cifs_ses *ses,
+			  struct TCP_Server_Info *server,
+			  bool from_reconnect)
+{
+	struct TCP_Server_Info *pserver;
+	unsigned int chan_index;
+
+	if (SERVER_IS_CHAN(server)) {
+		cifs_dbg(VFS,
+			"server %s does not support multichannel anymore. Skip secondary channel\n",
+			 ses->server->hostname);
+
+		spin_lock(&ses->chan_lock);
+		chan_index = cifs_ses_get_chan_index(ses, server);
+		if (chan_index == CIFS_INVAL_CHAN_INDEX) {
+			spin_unlock(&ses->chan_lock);
+			goto skip_terminate;
+		}
+
+		ses->chans[chan_index].server = NULL;
+		spin_unlock(&ses->chan_lock);
+
+		/*
+		 * the above reference of server by channel
+		 * needs to be dropped without holding chan_lock
+		 * as cifs_put_tcp_session takes a higher lock
+		 * i.e. cifs_tcp_ses_lock
+		 */
+		cifs_put_tcp_session(server, from_reconnect);
+
+		server->terminate = true;
+		cifs_signal_cifsd_for_reconnect(server, false);
+
+		/* mark primary server as needing reconnect */
+		pserver = server->primary_server;
+		cifs_signal_cifsd_for_reconnect(pserver, false);
+skip_terminate:
+		return -EHOSTDOWN;
+	}
+
+	cifs_server_dbg(VFS,
+		"server does not support multichannel anymore. Disable all other channels\n");
+	cifs_disable_secondary_channels(ses);
+
+
+	return 0;
+}
+
+static int
+smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon,
+	       struct TCP_Server_Info *server, bool from_reconnect)
+{
+	int rc = 0;
+	struct nls_table *nls_codepage = NULL;
+	struct cifs_ses *ses;
+	int xid;
+
+	/*
+	 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
+	 * check for tcp and smb session status done differently
+	 * for those three - in the calling routine.
+	 */
+	if (tcon == NULL)
+		return 0;
+
+	/*
+	 * Need to also skip SMB2_IOCTL because it is used for checking nested dfs links in
+	 * cifs_tree_connect().
+	 */
+	if (smb2_command == SMB2_TREE_CONNECT || smb2_command == SMB2_IOCTL)
+		return 0;
+
+	spin_lock(&tcon->tc_lock);
+	if (tcon->status == TID_EXITING) {
+		/*
+		 * only tree disconnect allowed when disconnecting ...
+		 */
+		if (smb2_command != SMB2_TREE_DISCONNECT) {
+			spin_unlock(&tcon->tc_lock);
+			cifs_dbg(FYI, "can not send cmd %d while umounting\n",
+				 smb2_command);
+			return -ENODEV;
+		}
+	}
+	spin_unlock(&tcon->tc_lock);
+
+	ses = tcon->ses;
+	if (!ses)
+		return -EIO;
+	spin_lock(&ses->ses_lock);
+	if (ses->ses_status == SES_EXITING) {
+		spin_unlock(&ses->ses_lock);
+		return -EIO;
+	}
+	spin_unlock(&ses->ses_lock);
+	if (!ses->server || !server)
+		return -EIO;
+
+	spin_lock(&server->srv_lock);
+	if (server->tcpStatus == CifsNeedReconnect) {
+		/*
+		 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
+		 * here since they are implicitly done when session drops.
+		 */
+		switch (smb2_command) {
+		/*
+		 * BB Should we keep oplock break and add flush to exceptions?
+		 */
+		case SMB2_TREE_DISCONNECT:
+		case SMB2_CANCEL:
+		case SMB2_CLOSE:
+		case SMB2_OPLOCK_BREAK:
+			spin_unlock(&server->srv_lock);
+			return -EAGAIN;
+		}
+	}
+
+	/* if server is marked for termination, cifsd will cleanup */
+	if (server->terminate) {
+		spin_unlock(&server->srv_lock);
+		return -EHOSTDOWN;
+	}
+	spin_unlock(&server->srv_lock);
+
+again:
+	rc = cifs_wait_for_server_reconnect(server, tcon->retry);
+	if (rc)
+		return rc;
+
+	spin_lock(&ses->chan_lock);
+	if (!cifs_chan_needs_reconnect(ses, server) && !tcon->need_reconnect) {
+		spin_unlock(&ses->chan_lock);
+		return 0;
+	}
+	spin_unlock(&ses->chan_lock);
+	cifs_dbg(FYI, "sess reconnect mask: 0x%lx, tcon reconnect: %d",
+		 tcon->ses->chans_need_reconnect,
+		 tcon->need_reconnect);
+
+	mutex_lock(&ses->session_mutex);
+	/*
+	 * if this is called by delayed work, and the channel has been disabled
+	 * in parallel, the delayed work can continue to execute in parallel
+	 * there's a chance that this channel may not exist anymore
+	 */
+	spin_lock(&server->srv_lock);
+	if (server->tcpStatus == CifsExiting) {
+		spin_unlock(&server->srv_lock);
+		mutex_unlock(&ses->session_mutex);
+		rc = -EHOSTDOWN;
+		goto out;
+	}
+
+	/*
+	 * Recheck after acquire mutex. If another thread is negotiating
+	 * and the server never sends an answer the socket will be closed
+	 * and tcpStatus set to reconnect.
+	 */
+	if (server->tcpStatus == CifsNeedReconnect) {
+		spin_unlock(&server->srv_lock);
+		mutex_unlock(&ses->session_mutex);
+
+		if (tcon->retry)
+			goto again;
+
+		rc = -EHOSTDOWN;
+		goto out;
+	}
+	spin_unlock(&server->srv_lock);
+
+	nls_codepage = ses->local_nls;
+
+	/*
+	 * need to prevent multiple threads trying to simultaneously
+	 * reconnect the same SMB session
+	 */
+	spin_lock(&ses->ses_lock);
+	spin_lock(&ses->chan_lock);
+	if (!cifs_chan_needs_reconnect(ses, server) &&
+	    ses->ses_status == SES_GOOD) {
+		spin_unlock(&ses->chan_lock);
+		spin_unlock(&ses->ses_lock);
+		/* this means that we only need to tree connect */
+		if (tcon->need_reconnect)
+			goto skip_sess_setup;
+
+		mutex_unlock(&ses->session_mutex);
+		goto out;
+	}
+	spin_unlock(&ses->chan_lock);
+	spin_unlock(&ses->ses_lock);
+
+	rc = cifs_negotiate_protocol(0, ses, server);
+	if (!rc) {
+		/*
+		 * if server stopped supporting multichannel
+		 * and the first channel reconnected, disable all the others.
+		 */
+		if (ses->chan_count > 1 &&
+		    !(server->capabilities & SMB2_GLOBAL_CAP_MULTI_CHANNEL)) {
+			rc = cifs_chan_skip_or_disable(ses, server,
+						       from_reconnect);
+			if (rc) {
+				mutex_unlock(&ses->session_mutex);
+				goto out;
+			}
+		}
+
+		rc = cifs_setup_session(0, ses, server, nls_codepage);
+		if ((rc == -EACCES) && !tcon->retry) {
+			mutex_unlock(&ses->session_mutex);
+			rc = -EHOSTDOWN;
+			goto failed;
+		} else if (rc) {
+			mutex_unlock(&ses->session_mutex);
+			goto out;
+		}
+	} else {
+		mutex_unlock(&ses->session_mutex);
+		goto out;
+	}
+
+skip_sess_setup:
+	if (!tcon->need_reconnect) {
+		mutex_unlock(&ses->session_mutex);
+		goto out;
+	}
+	cifs_mark_open_files_invalid(tcon);
+	if (tcon->use_persistent)
+		tcon->need_reopen_files = true;
+
+	rc = cifs_tree_connect(0, tcon, nls_codepage);
+
+	cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
+	if (rc) {
+		/* If sess reconnected but tcon didn't, something strange ... */
+		mutex_unlock(&ses->session_mutex);
+		cifs_dbg(VFS, "reconnect tcon failed rc = %d\n", rc);
+		goto out;
+	}
+
+	if (!rc &&
+	    (server->capabilities & SMB2_GLOBAL_CAP_MULTI_CHANNEL)) {
+		mutex_unlock(&ses->session_mutex);
+
+		/*
+		 * query server network interfaces, in case they change
+		 */
+		xid = get_xid();
+		rc = SMB3_request_interfaces(xid, tcon, false);
+		free_xid(xid);
+
+		if (rc == -EOPNOTSUPP) {
+			/*
+			 * some servers like Azure SMB server do not advertise
+			 * that multichannel has been disabled with server
+			 * capabilities, rather return STATUS_NOT_IMPLEMENTED.
+			 * treat this as server not supporting multichannel
+			 */
+
+			rc = cifs_chan_skip_or_disable(ses, server,
+						       from_reconnect);
+			goto skip_add_channels;
+		} else if (rc)
+			cifs_dbg(FYI, "%s: failed to query server interfaces: %d\n",
+				 __func__, rc);
+
+		if (ses->chan_max > ses->chan_count &&
+		    ses->iface_count &&
+		    !SERVER_IS_CHAN(server)) {
+			if (ses->chan_count == 1)
+				cifs_server_dbg(VFS, "supports multichannel now\n");
+
+			cifs_try_adding_channels(ses);
+		}
+	} else {
+		mutex_unlock(&ses->session_mutex);
+	}
+skip_add_channels:
+
+	if (smb2_command != SMB2_INTERNAL_CMD)
+		mod_delayed_work(cifsiod_wq, &server->reconnect, 0);
+
+	atomic_inc(&tconInfoReconnectCount);
+out:
+	/*
+	 * Check if handle based operation so we know whether we can continue
+	 * or not without returning to caller to reset file handle.
+	 */
+	/*
+	 * BB Is flush done by server on drop of tcp session? Should we special
+	 * case it and skip above?
+	 */
+	switch (smb2_command) {
+	case SMB2_FLUSH:
+	case SMB2_READ:
+	case SMB2_WRITE:
+	case SMB2_LOCK:
+	case SMB2_QUERY_DIRECTORY:
+	case SMB2_CHANGE_NOTIFY:
+	case SMB2_QUERY_INFO:
+	case SMB2_SET_INFO:
+		rc = -EAGAIN;
+	}
+failed:
+	return rc;
+}
+
+static void
+fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon,
+	       struct TCP_Server_Info *server,
+	       void *buf,
+	       unsigned int *total_len)
+{
+	struct smb2_pdu *spdu = buf;
+	/* lookup word count ie StructureSize from table */
+	__u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)];
+
+	/*
+	 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
+	 * largest operations (Create)
+	 */
+	memset(buf, 0, 256);
+
+	smb2_hdr_assemble(&spdu->hdr, smb2_command, tcon, server);
+	spdu->StructureSize2 = cpu_to_le16(parmsize);
+
+	*total_len = parmsize + sizeof(struct smb2_hdr);
+}
+
+/*
+ * Allocate and return pointer to an SMB request hdr, and set basic
+ * SMB information in the SMB header. If the return code is zero, this
+ * function must have filled in request_buf pointer.
+ */
+static int __smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
+				 struct TCP_Server_Info *server,
+				 void **request_buf, unsigned int *total_len)
+{
+	/* BB eventually switch this to SMB2 specific small buf size */
+	switch (smb2_command) {
+	case SMB2_SET_INFO:
+	case SMB2_QUERY_INFO:
+		*request_buf = cifs_buf_get();
+		break;
+	default:
+		*request_buf = cifs_small_buf_get();
+		break;
+	}
+	if (*request_buf == NULL) {
+		/* BB should we add a retry in here if not a writepage? */
+		return -ENOMEM;
+	}
+
+	fill_small_buf(smb2_command, tcon, server,
+		       (struct smb2_hdr *)(*request_buf),
+		       total_len);
+
+	if (tcon != NULL) {
+		uint16_t com_code = le16_to_cpu(smb2_command);
+		cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
+		cifs_stats_inc(&tcon->num_smbs_sent);
+	}
+
+	return 0;
+}
+
+static int smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
+			       struct TCP_Server_Info *server,
+			       void **request_buf, unsigned int *total_len)
+{
+	int rc;
+
+	rc = smb2_reconnect(smb2_command, tcon, server, false);
+	if (rc)
+		return rc;
+
+	return __smb2_plain_req_init(smb2_command, tcon, server, request_buf,
+				     total_len);
+}
+
+static int smb2_ioctl_req_init(u32 opcode, struct cifs_tcon *tcon,
+			       struct TCP_Server_Info *server,
+			       void **request_buf, unsigned int *total_len)
+{
+	/* Skip reconnect only for FSCTL_VALIDATE_NEGOTIATE_INFO IOCTLs */
+	if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO) {
+		return __smb2_plain_req_init(SMB2_IOCTL, tcon, server,
+					     request_buf, total_len);
+	}
+	return smb2_plain_req_init(SMB2_IOCTL, tcon, server,
+				   request_buf, total_len);
+}
+
+/* For explanation of negotiate contexts see MS-SMB2 section 2.2.3.1 */
+
+static void
+build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
+{
+	pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
+	pneg_ctxt->DataLength = cpu_to_le16(38);
+	pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
+	pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
+	get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
+	pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
+}
+
+static void
+build_compression_ctxt(struct smb2_compression_capabilities_context *pneg_ctxt)
+{
+	pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES;
+	pneg_ctxt->DataLength =
+		cpu_to_le16(sizeof(struct smb2_compression_capabilities_context)
+			  - sizeof(struct smb2_neg_context));
+	pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(3);
+	pneg_ctxt->CompressionAlgorithms[0] = SMB3_COMPRESS_LZ77;
+	pneg_ctxt->CompressionAlgorithms[1] = SMB3_COMPRESS_LZ77_HUFF;
+	pneg_ctxt->CompressionAlgorithms[2] = SMB3_COMPRESS_LZNT1;
+}
+
+static unsigned int
+build_signing_ctxt(struct smb2_signing_capabilities *pneg_ctxt)
+{
+	unsigned int ctxt_len = sizeof(struct smb2_signing_capabilities);
+	unsigned short num_algs = 1; /* number of signing algorithms sent */
+
+	pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
+	/*
+	 * Context Data length must be rounded to multiple of 8 for some servers
+	 */
+	pneg_ctxt->DataLength = cpu_to_le16(ALIGN(sizeof(struct smb2_signing_capabilities) -
+					    sizeof(struct smb2_neg_context) +
+					    (num_algs * sizeof(u16)), 8));
+	pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(num_algs);
+	pneg_ctxt->SigningAlgorithms[0] = cpu_to_le16(SIGNING_ALG_AES_CMAC);
+
+	ctxt_len += sizeof(__le16) * num_algs;
+	ctxt_len = ALIGN(ctxt_len, 8);
+	return ctxt_len;
+	/* TBD add SIGNING_ALG_AES_GMAC and/or SIGNING_ALG_HMAC_SHA256 */
+}
+
+static void
+build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
+{
+	pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
+	if (require_gcm_256) {
+		pneg_ctxt->DataLength = cpu_to_le16(4); /* Cipher Count + 1 cipher */
+		pneg_ctxt->CipherCount = cpu_to_le16(1);
+		pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES256_GCM;
+	} else if (enable_gcm_256) {
+		pneg_ctxt->DataLength = cpu_to_le16(8); /* Cipher Count + 3 ciphers */
+		pneg_ctxt->CipherCount = cpu_to_le16(3);
+		pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
+		pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES256_GCM;
+		pneg_ctxt->Ciphers[2] = SMB2_ENCRYPTION_AES128_CCM;
+	} else {
+		pneg_ctxt->DataLength = cpu_to_le16(6); /* Cipher Count + 2 ciphers */
+		pneg_ctxt->CipherCount = cpu_to_le16(2);
+		pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
+		pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM;
+	}
+}
+
+static unsigned int
+build_netname_ctxt(struct smb2_netname_neg_context *pneg_ctxt, char *hostname)
+{
+	struct nls_table *cp = load_nls_default();
+
+	pneg_ctxt->ContextType = SMB2_NETNAME_NEGOTIATE_CONTEXT_ID;
+
+	/* copy up to max of first 100 bytes of server name to NetName field */
+	pneg_ctxt->DataLength = cpu_to_le16(2 * cifs_strtoUTF16(pneg_ctxt->NetName, hostname, 100, cp));
+	/* context size is DataLength + minimal smb2_neg_context */
+	return ALIGN(le16_to_cpu(pneg_ctxt->DataLength) + sizeof(struct smb2_neg_context), 8);
+}
+
+static void
+build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
+{
+	pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
+	pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
+	/* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
+	pneg_ctxt->Name[0] = 0x93;
+	pneg_ctxt->Name[1] = 0xAD;
+	pneg_ctxt->Name[2] = 0x25;
+	pneg_ctxt->Name[3] = 0x50;
+	pneg_ctxt->Name[4] = 0x9C;
+	pneg_ctxt->Name[5] = 0xB4;
+	pneg_ctxt->Name[6] = 0x11;
+	pneg_ctxt->Name[7] = 0xE7;
+	pneg_ctxt->Name[8] = 0xB4;
+	pneg_ctxt->Name[9] = 0x23;
+	pneg_ctxt->Name[10] = 0x83;
+	pneg_ctxt->Name[11] = 0xDE;
+	pneg_ctxt->Name[12] = 0x96;
+	pneg_ctxt->Name[13] = 0x8B;
+	pneg_ctxt->Name[14] = 0xCD;
+	pneg_ctxt->Name[15] = 0x7C;
+}
+
+static void
+assemble_neg_contexts(struct smb2_negotiate_req *req,
+		      struct TCP_Server_Info *server, unsigned int *total_len)
+{
+	unsigned int ctxt_len, neg_context_count;
+	struct TCP_Server_Info *pserver;
+	char *pneg_ctxt;
+	char *hostname;
+
+	if (*total_len > 200) {
+		/* In case length corrupted don't want to overrun smb buffer */
+		cifs_server_dbg(VFS, "Bad frame length assembling neg contexts\n");
+		return;
+	}
+
+	/*
+	 * round up total_len of fixed part of SMB3 negotiate request to 8
+	 * byte boundary before adding negotiate contexts
+	 */
+	*total_len = ALIGN(*total_len, 8);
+
+	pneg_ctxt = (*total_len) + (char *)req;
+	req->NegotiateContextOffset = cpu_to_le32(*total_len);
+
+	build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
+	ctxt_len = ALIGN(sizeof(struct smb2_preauth_neg_context), 8);
+	*total_len += ctxt_len;
+	pneg_ctxt += ctxt_len;
+
+	build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
+	ctxt_len = ALIGN(sizeof(struct smb2_encryption_neg_context), 8);
+	*total_len += ctxt_len;
+	pneg_ctxt += ctxt_len;
+
+	/*
+	 * secondary channels don't have the hostname field populated
+	 * use the hostname field in the primary channel instead
+	 */
+	pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
+	cifs_server_lock(pserver);
+	hostname = pserver->hostname;
+	if (hostname && (hostname[0] != 0)) {
+		ctxt_len = build_netname_ctxt((struct smb2_netname_neg_context *)pneg_ctxt,
+					      hostname);
+		*total_len += ctxt_len;
+		pneg_ctxt += ctxt_len;
+		neg_context_count = 3;
+	} else
+		neg_context_count = 2;
+	cifs_server_unlock(pserver);
+
+	build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
+	*total_len += sizeof(struct smb2_posix_neg_context);
+	pneg_ctxt += sizeof(struct smb2_posix_neg_context);
+	neg_context_count++;
+
+	if (server->compress_algorithm) {
+		build_compression_ctxt((struct smb2_compression_capabilities_context *)
+				pneg_ctxt);
+		ctxt_len = ALIGN(sizeof(struct smb2_compression_capabilities_context), 8);
+		*total_len += ctxt_len;
+		pneg_ctxt += ctxt_len;
+		neg_context_count++;
+	}
+
+	if (enable_negotiate_signing) {
+		ctxt_len = build_signing_ctxt((struct smb2_signing_capabilities *)
+				pneg_ctxt);
+		*total_len += ctxt_len;
+		pneg_ctxt += ctxt_len;
+		neg_context_count++;
+	}
+
+	/* check for and add transport_capabilities and signing capabilities */
+	req->NegotiateContextCount = cpu_to_le16(neg_context_count);
+
+}
+
+/* If invalid preauth context warn but use what we requested, SHA-512 */
+static void decode_preauth_context(struct smb2_preauth_neg_context *ctxt)
+{
+	unsigned int len = le16_to_cpu(ctxt->DataLength);
+
+	/*
+	 * Caller checked that DataLength remains within SMB boundary. We still
+	 * need to confirm that one HashAlgorithms member is accounted for.
+	 */
+	if (len < MIN_PREAUTH_CTXT_DATA_LEN) {
+		pr_warn_once("server sent bad preauth context\n");
+		return;
+	} else if (len < MIN_PREAUTH_CTXT_DATA_LEN + le16_to_cpu(ctxt->SaltLength)) {
+		pr_warn_once("server sent invalid SaltLength\n");
+		return;
+	}
+	if (le16_to_cpu(ctxt->HashAlgorithmCount) != 1)
+		pr_warn_once("Invalid SMB3 hash algorithm count\n");
+	if (ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
+		pr_warn_once("unknown SMB3 hash algorithm\n");
+}
+
+static void decode_compress_ctx(struct TCP_Server_Info *server,
+			 struct smb2_compression_capabilities_context *ctxt)
+{
+	unsigned int len = le16_to_cpu(ctxt->DataLength);
+
+	/*
+	 * Caller checked that DataLength remains within SMB boundary. We still
+	 * need to confirm that one CompressionAlgorithms member is accounted
+	 * for.
+	 */
+	if (len < 10) {
+		pr_warn_once("server sent bad compression cntxt\n");
+		return;
+	}
+	if (le16_to_cpu(ctxt->CompressionAlgorithmCount) != 1) {
+		pr_warn_once("Invalid SMB3 compress algorithm count\n");
+		return;
+	}
+	if (le16_to_cpu(ctxt->CompressionAlgorithms[0]) > 3) {
+		pr_warn_once("unknown compression algorithm\n");
+		return;
+	}
+	server->compress_algorithm = ctxt->CompressionAlgorithms[0];
+}
+
+static int decode_encrypt_ctx(struct TCP_Server_Info *server,
+			      struct smb2_encryption_neg_context *ctxt)
+{
+	unsigned int len = le16_to_cpu(ctxt->DataLength);
+
+	cifs_dbg(FYI, "decode SMB3.11 encryption neg context of len %d\n", len);
+	/*
+	 * Caller checked that DataLength remains within SMB boundary. We still
+	 * need to confirm that one Cipher flexible array member is accounted
+	 * for.
+	 */
+	if (len < MIN_ENCRYPT_CTXT_DATA_LEN) {
+		pr_warn_once("server sent bad crypto ctxt len\n");
+		return -EINVAL;
+	}
+
+	if (le16_to_cpu(ctxt->CipherCount) != 1) {
+		pr_warn_once("Invalid SMB3.11 cipher count\n");
+		return -EINVAL;
+	}
+	cifs_dbg(FYI, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt->Ciphers[0]));
+	if (require_gcm_256) {
+		if (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES256_GCM) {
+			cifs_dbg(VFS, "Server does not support requested encryption type (AES256 GCM)\n");
+			return -EOPNOTSUPP;
+		}
+	} else if (ctxt->Ciphers[0] == 0) {
+		/*
+		 * e.g. if server only supported AES256_CCM (very unlikely)
+		 * or server supported no encryption types or had all disabled.
+		 * Since GLOBAL_CAP_ENCRYPTION will be not set, in the case
+		 * in which mount requested encryption ("seal") checks later
+		 * on during tree connection will return proper rc, but if
+		 * seal not requested by client, since server is allowed to
+		 * return 0 to indicate no supported cipher, we can't fail here
+		 */
+		server->cipher_type = 0;
+		server->capabilities &= ~SMB2_GLOBAL_CAP_ENCRYPTION;
+		pr_warn_once("Server does not support requested encryption types\n");
+		return 0;
+	} else if ((ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_CCM) &&
+		   (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_GCM) &&
+		   (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES256_GCM)) {
+		/* server returned a cipher we didn't ask for */
+		pr_warn_once("Invalid SMB3.11 cipher returned\n");
+		return -EINVAL;
+	}
+	server->cipher_type = ctxt->Ciphers[0];
+	server->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
+	return 0;
+}
+
+static void decode_signing_ctx(struct TCP_Server_Info *server,
+			       struct smb2_signing_capabilities *pctxt)
+{
+	unsigned int len = le16_to_cpu(pctxt->DataLength);
+
+	/*
+	 * Caller checked that DataLength remains within SMB boundary. We still
+	 * need to confirm that one SigningAlgorithms flexible array member is
+	 * accounted for.
+	 */
+	if ((len < 4) || (len > 16)) {
+		pr_warn_once("server sent bad signing negcontext\n");
+		return;
+	}
+	if (le16_to_cpu(pctxt->SigningAlgorithmCount) != 1) {
+		pr_warn_once("Invalid signing algorithm count\n");
+		return;
+	}
+	if (le16_to_cpu(pctxt->SigningAlgorithms[0]) > 2) {
+		pr_warn_once("unknown signing algorithm\n");
+		return;
+	}
+
+	server->signing_negotiated = true;
+	server->signing_algorithm = le16_to_cpu(pctxt->SigningAlgorithms[0]);
+	cifs_dbg(FYI, "signing algorithm %d chosen\n",
+		     server->signing_algorithm);
+}
+
+
+static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp,
+				     struct TCP_Server_Info *server,
+				     unsigned int len_of_smb)
+{
+	struct smb2_neg_context *pctx;
+	unsigned int offset = le32_to_cpu(rsp->NegotiateContextOffset);
+	unsigned int ctxt_cnt = le16_to_cpu(rsp->NegotiateContextCount);
+	unsigned int len_of_ctxts, i;
+	int rc = 0;
+
+	cifs_dbg(FYI, "decoding %d negotiate contexts\n", ctxt_cnt);
+	if (len_of_smb <= offset) {
+		cifs_server_dbg(VFS, "Invalid response: negotiate context offset\n");
+		return -EINVAL;
+	}
+
+	len_of_ctxts = len_of_smb - offset;
+
+	for (i = 0; i < ctxt_cnt; i++) {
+		int clen;
+		/* check that offset is not beyond end of SMB */
+		if (len_of_ctxts < sizeof(struct smb2_neg_context))
+			break;
+
+		pctx = (struct smb2_neg_context *)(offset + (char *)rsp);
+		clen = sizeof(struct smb2_neg_context)
+			+ le16_to_cpu(pctx->DataLength);
+		/*
+		 * 2.2.4 SMB2 NEGOTIATE Response
+		 * Subsequent negotiate contexts MUST appear at the first 8-byte
+		 * aligned offset following the previous negotiate context.
+		 */
+		if (i + 1 != ctxt_cnt)
+			clen = ALIGN(clen, 8);
+		if (clen > len_of_ctxts)
+			break;
+
+		if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES)
+			decode_preauth_context(
+				(struct smb2_preauth_neg_context *)pctx);
+		else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES)
+			rc = decode_encrypt_ctx(server,
+				(struct smb2_encryption_neg_context *)pctx);
+		else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES)
+			decode_compress_ctx(server,
+				(struct smb2_compression_capabilities_context *)pctx);
+		else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE)
+			server->posix_ext_supported = true;
+		else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES)
+			decode_signing_ctx(server,
+				(struct smb2_signing_capabilities *)pctx);
+		else
+			cifs_server_dbg(VFS, "unknown negcontext of type %d ignored\n",
+				le16_to_cpu(pctx->ContextType));
+		if (rc)
+			break;
+
+		offset += clen;
+		len_of_ctxts -= clen;
+	}
+	return rc;
+}
+
+static struct create_posix *
+create_posix_buf(umode_t mode)
+{
+	struct create_posix *buf;
+
+	buf = kzalloc(sizeof(struct create_posix),
+			GFP_KERNEL);
+	if (!buf)
+		return NULL;
+
+	buf->ccontext.DataOffset =
+		cpu_to_le16(offsetof(struct create_posix, Mode));
+	buf->ccontext.DataLength = cpu_to_le32(4);
+	buf->ccontext.NameOffset =
+		cpu_to_le16(offsetof(struct create_posix, Name));
+	buf->ccontext.NameLength = cpu_to_le16(16);
+
+	/* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
+	buf->Name[0] = 0x93;
+	buf->Name[1] = 0xAD;
+	buf->Name[2] = 0x25;
+	buf->Name[3] = 0x50;
+	buf->Name[4] = 0x9C;
+	buf->Name[5] = 0xB4;
+	buf->Name[6] = 0x11;
+	buf->Name[7] = 0xE7;
+	buf->Name[8] = 0xB4;
+	buf->Name[9] = 0x23;
+	buf->Name[10] = 0x83;
+	buf->Name[11] = 0xDE;
+	buf->Name[12] = 0x96;
+	buf->Name[13] = 0x8B;
+	buf->Name[14] = 0xCD;
+	buf->Name[15] = 0x7C;
+	buf->Mode = cpu_to_le32(mode);
+	cifs_dbg(FYI, "mode on posix create 0%o\n", mode);
+	return buf;
+}
+
+static int
+add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode)
+{
+	unsigned int num = *num_iovec;
+
+	iov[num].iov_base = create_posix_buf(mode);
+	if (mode == ACL_NO_MODE)
+		cifs_dbg(FYI, "%s: no mode\n", __func__);
+	if (iov[num].iov_base == NULL)
+		return -ENOMEM;
+	iov[num].iov_len = sizeof(struct create_posix);
+	*num_iovec = num + 1;
+	return 0;
+}
+
+
+/*
+ *
+ *	SMB2 Worker functions follow:
+ *
+ *	The general structure of the worker functions is:
+ *	1) Call smb2_init (assembles SMB2 header)
+ *	2) Initialize SMB2 command specific fields in fixed length area of SMB
+ *	3) Call smb_sendrcv2 (sends request on socket and waits for response)
+ *	4) Decode SMB2 command specific fields in the fixed length area
+ *	5) Decode variable length data area (if any for this SMB2 command type)
+ *	6) Call free smb buffer
+ *	7) return
+ *
+ */
+
+int
+SMB2_negotiate(const unsigned int xid,
+	       struct cifs_ses *ses,
+	       struct TCP_Server_Info *server)
+{
+	struct smb_rqst rqst;
+	struct smb2_negotiate_req *req;
+	struct smb2_negotiate_rsp *rsp;
+	struct kvec iov[1];
+	struct kvec rsp_iov;
+	int rc;
+	int resp_buftype;
+	int blob_offset, blob_length;
+	char *security_blob;
+	int flags = CIFS_NEG_OP;
+	unsigned int total_len;
+
+	cifs_dbg(FYI, "Negotiate protocol\n");
+
+	if (!server) {
+		WARN(1, "%s: server is NULL!\n", __func__);
+		return -EIO;
+	}
+
+	rc = smb2_plain_req_init(SMB2_NEGOTIATE, NULL, server,
+				 (void **) &req, &total_len);
+	if (rc)
+		return rc;
+
+	req->hdr.SessionId = 0;
+
+	memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
+	memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
+
+	if (strcmp(server->vals->version_string,
+		   SMB3ANY_VERSION_STRING) == 0) {
+		req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
+		req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
+		req->Dialects[2] = cpu_to_le16(SMB311_PROT_ID);
+		req->DialectCount = cpu_to_le16(3);
+		total_len += 6;
+	} else if (strcmp(server->vals->version_string,
+		   SMBDEFAULT_VERSION_STRING) == 0) {
+		req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
+		req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
+		req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
+		req->Dialects[3] = cpu_to_le16(SMB311_PROT_ID);
+		req->DialectCount = cpu_to_le16(4);
+		total_len += 8;
+	} else {
+		/* otherwise send specific dialect */
+		req->Dialects[0] = cpu_to_le16(server->vals->protocol_id);
+		req->DialectCount = cpu_to_le16(1);
+		total_len += 2;
+	}
+
+	/* only one of SMB2 signing flags may be set in SMB2 request */
+	if (ses->sign)
+		req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
+	else if (global_secflags & CIFSSEC_MAY_SIGN)
+		req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
+	else
+		req->SecurityMode = 0;
+
+	req->Capabilities = cpu_to_le32(server->vals->req_capabilities);
+	if (ses->chan_max > 1)
+		req->Capabilities |= cpu_to_le32(SMB2_GLOBAL_CAP_MULTI_CHANNEL);
+
+	/* ClientGUID must be zero for SMB2.02 dialect */
+	if (server->vals->protocol_id == SMB20_PROT_ID)
+		memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
+	else {
+		memcpy(req->ClientGUID, server->client_guid,
+			SMB2_CLIENT_GUID_SIZE);
+		if ((server->vals->protocol_id == SMB311_PROT_ID) ||
+		    (strcmp(server->vals->version_string,
+		     SMB3ANY_VERSION_STRING) == 0) ||
+		    (strcmp(server->vals->version_string,
+		     SMBDEFAULT_VERSION_STRING) == 0))
+			assemble_neg_contexts(req, server, &total_len);
+	}
+	iov[0].iov_base = (char *)req;
+	iov[0].iov_len = total_len;
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	rqst.rq_iov = iov;
+	rqst.rq_nvec = 1;
+
+	rc = cifs_send_recv(xid, ses, server,
+			    &rqst, &resp_buftype, flags, &rsp_iov);
+	cifs_small_buf_release(req);
+	rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base;
+	/*
+	 * No tcon so can't do
+	 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
+	 */
+	if (rc == -EOPNOTSUPP) {
+		cifs_server_dbg(VFS, "Dialect not supported by server. Consider  specifying vers=1.0 or vers=2.0 on mount for accessing older servers\n");
+		goto neg_exit;
+	} else if (rc != 0)
+		goto neg_exit;
+
+	rc = -EIO;
+	if (strcmp(server->vals->version_string,
+		   SMB3ANY_VERSION_STRING) == 0) {
+		if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
+			cifs_server_dbg(VFS,
+				"SMB2 dialect returned but not requested\n");
+			goto neg_exit;
+		} else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
+			cifs_server_dbg(VFS,
+				"SMB2.1 dialect returned but not requested\n");
+			goto neg_exit;
+		} else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
+			/* ops set to 3.0 by default for default so update */
+			server->ops = &smb311_operations;
+			server->vals = &smb311_values;
+		}
+	} else if (strcmp(server->vals->version_string,
+		   SMBDEFAULT_VERSION_STRING) == 0) {
+		if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
+			cifs_server_dbg(VFS,
+				"SMB2 dialect returned but not requested\n");
+			goto neg_exit;
+		} else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
+			/* ops set to 3.0 by default for default so update */
+			server->ops = &smb21_operations;
+			server->vals = &smb21_values;
+		} else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
+			server->ops = &smb311_operations;
+			server->vals = &smb311_values;
+		}
+	} else if (le16_to_cpu(rsp->DialectRevision) !=
+				server->vals->protocol_id) {
+		/* if requested single dialect ensure returned dialect matched */
+		cifs_server_dbg(VFS, "Invalid 0x%x dialect returned: not requested\n",
+				le16_to_cpu(rsp->DialectRevision));
+		goto neg_exit;
+	}
+
+	cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
+
+	if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
+		cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
+	else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
+		cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
+	else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
+		cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
+	else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
+		cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
+	else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
+		cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
+	else {
+		cifs_server_dbg(VFS, "Invalid dialect returned by server 0x%x\n",
+				le16_to_cpu(rsp->DialectRevision));
+		goto neg_exit;
+	}
+
+	rc = 0;
+	server->dialect = le16_to_cpu(rsp->DialectRevision);
+
+	/*
+	 * Keep a copy of the hash after negprot. This hash will be
+	 * the starting hash value for all sessions made from this
+	 * server.
+	 */
+	memcpy(server->preauth_sha_hash, ses->preauth_sha_hash,
+	       SMB2_PREAUTH_HASH_SIZE);
+
+	/* SMB2 only has an extended negflavor */
+	server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
+	/* set it to the maximum buffer size value we can send with 1 credit */
+	server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
+			       SMB2_MAX_BUFFER_SIZE);
+	server->max_read = le32_to_cpu(rsp->MaxReadSize);
+	server->max_write = le32_to_cpu(rsp->MaxWriteSize);
+	server->sec_mode = le16_to_cpu(rsp->SecurityMode);
+	if ((server->sec_mode & SMB2_SEC_MODE_FLAGS_ALL) != server->sec_mode)
+		cifs_dbg(FYI, "Server returned unexpected security mode 0x%x\n",
+				server->sec_mode);
+	server->capabilities = le32_to_cpu(rsp->Capabilities);
+	/* Internal types */
+	server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
+
+	/*
+	 * SMB3.0 supports only 1 cipher and doesn't have a encryption neg context
+	 * Set the cipher type manually.
+	 */
+	if (server->dialect == SMB30_PROT_ID && (server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
+		server->cipher_type = SMB2_ENCRYPTION_AES128_CCM;
+
+	security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
+					       (struct smb2_hdr *)rsp);
+	/*
+	 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
+	 * for us will be
+	 *	ses->sectype = RawNTLMSSP;
+	 * but for time being this is our only auth choice so doesn't matter.
+	 * We just found a server which sets blob length to zero expecting raw.
+	 */
+	if (blob_length == 0) {
+		cifs_dbg(FYI, "missing security blob on negprot\n");
+		server->sec_ntlmssp = true;
+	}
+
+	rc = cifs_enable_signing(server, ses->sign);
+	if (rc)
+		goto neg_exit;
+	if (blob_length) {
+		rc = decode_negTokenInit(security_blob, blob_length, server);
+		if (rc == 1)
+			rc = 0;
+		else if (rc == 0)
+			rc = -EIO;
+	}
+
+	if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
+		if (rsp->NegotiateContextCount)
+			rc = smb311_decode_neg_context(rsp, server,
+						       rsp_iov.iov_len);
+		else
+			cifs_server_dbg(VFS, "Missing expected negotiate contexts\n");
+	}
+neg_exit:
+	free_rsp_buf(resp_buftype, rsp);
+	return rc;
+}
+
+int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
+{
+	int rc;
+	struct validate_negotiate_info_req *pneg_inbuf;
+	struct validate_negotiate_info_rsp *pneg_rsp = NULL;
+	u32 rsplen;
+	u32 inbuflen; /* max of 4 dialects */
+	struct TCP_Server_Info *server = tcon->ses->server;
+
+	cifs_dbg(FYI, "validate negotiate\n");
+
+	/* In SMB3.11 preauth integrity supersedes validate negotiate */
+	if (server->dialect == SMB311_PROT_ID)
+		return 0;
+
+	/*
+	 * validation ioctl must be signed, so no point sending this if we
+	 * can not sign it (ie are not known user).  Even if signing is not
+	 * required (enabled but not negotiated), in those cases we selectively
+	 * sign just this, the first and only signed request on a connection.
+	 * Having validation of negotiate info  helps reduce attack vectors.
+	 */
+	if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
+		return 0; /* validation requires signing */
+
+	if (tcon->ses->user_name == NULL) {
+		cifs_dbg(FYI, "Can't validate negotiate: null user mount\n");
+		return 0; /* validation requires signing */
+	}
+
+	if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
+		cifs_tcon_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n");
+
+	pneg_inbuf = kmalloc(sizeof(*pneg_inbuf), GFP_NOFS);
+	if (!pneg_inbuf)
+		return -ENOMEM;
+
+	pneg_inbuf->Capabilities =
+			cpu_to_le32(server->vals->req_capabilities);
+	if (tcon->ses->chan_max > 1)
+		pneg_inbuf->Capabilities |= cpu_to_le32(SMB2_GLOBAL_CAP_MULTI_CHANNEL);
+
+	memcpy(pneg_inbuf->Guid, server->client_guid,
+					SMB2_CLIENT_GUID_SIZE);
+
+	if (tcon->ses->sign)
+		pneg_inbuf->SecurityMode =
+			cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
+	else if (global_secflags & CIFSSEC_MAY_SIGN)
+		pneg_inbuf->SecurityMode =
+			cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
+	else
+		pneg_inbuf->SecurityMode = 0;
+
+
+	if (strcmp(server->vals->version_string,
+		SMB3ANY_VERSION_STRING) == 0) {
+		pneg_inbuf->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
+		pneg_inbuf->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
+		pneg_inbuf->Dialects[2] = cpu_to_le16(SMB311_PROT_ID);
+		pneg_inbuf->DialectCount = cpu_to_le16(3);
+		/* SMB 2.1 not included so subtract one dialect from len */
+		inbuflen = sizeof(*pneg_inbuf) -
+				(sizeof(pneg_inbuf->Dialects[0]));
+	} else if (strcmp(server->vals->version_string,
+		SMBDEFAULT_VERSION_STRING) == 0) {
+		pneg_inbuf->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
+		pneg_inbuf->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
+		pneg_inbuf->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
+		pneg_inbuf->Dialects[3] = cpu_to_le16(SMB311_PROT_ID);
+		pneg_inbuf->DialectCount = cpu_to_le16(4);
+		/* structure is big enough for 4 dialects */
+		inbuflen = sizeof(*pneg_inbuf);
+	} else {
+		/* otherwise specific dialect was requested */
+		pneg_inbuf->Dialects[0] =
+			cpu_to_le16(server->vals->protocol_id);
+		pneg_inbuf->DialectCount = cpu_to_le16(1);
+		/* structure is big enough for 4 dialects, sending only 1 */
+		inbuflen = sizeof(*pneg_inbuf) -
+				sizeof(pneg_inbuf->Dialects[0]) * 3;
+	}
+
+	rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
+		FSCTL_VALIDATE_NEGOTIATE_INFO,
+		(char *)pneg_inbuf, inbuflen, CIFSMaxBufSize,
+		(char **)&pneg_rsp, &rsplen);
+	if (rc == -EOPNOTSUPP) {
+		/*
+		 * Old Windows versions or Netapp SMB server can return
+		 * not supported error. Client should accept it.
+		 */
+		cifs_tcon_dbg(VFS, "Server does not support validate negotiate\n");
+		rc = 0;
+		goto out_free_inbuf;
+	} else if (rc != 0) {
+		cifs_tcon_dbg(VFS, "validate protocol negotiate failed: %d\n",
+			      rc);
+		rc = -EIO;
+		goto out_free_inbuf;
+	}
+
+	rc = -EIO;
+	if (rsplen != sizeof(*pneg_rsp)) {
+		cifs_tcon_dbg(VFS, "Invalid protocol negotiate response size: %d\n",
+			      rsplen);
+
+		/* relax check since Mac returns max bufsize allowed on ioctl */
+		if (rsplen > CIFSMaxBufSize || rsplen < sizeof(*pneg_rsp))
+			goto out_free_rsp;
+	}
+
+	/* check validate negotiate info response matches what we got earlier */
+	if (pneg_rsp->Dialect != cpu_to_le16(server->dialect))
+		goto vneg_out;
+
+	if (pneg_rsp->SecurityMode != cpu_to_le16(server->sec_mode))
+		goto vneg_out;
+
+	/* do not validate server guid because not saved at negprot time yet */
+
+	if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
+	      SMB2_LARGE_FILES) != server->capabilities)
+		goto vneg_out;
+
+	/* validate negotiate successful */
+	rc = 0;
+	cifs_dbg(FYI, "validate negotiate info successful\n");
+	goto out_free_rsp;
+
+vneg_out:
+	cifs_tcon_dbg(VFS, "protocol revalidation - security settings mismatch\n");
+out_free_rsp:
+	kfree(pneg_rsp);
+out_free_inbuf:
+	kfree(pneg_inbuf);
+	return rc;
+}
+
+enum securityEnum
+smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
+{
+	switch (requested) {
+	case Kerberos:
+	case RawNTLMSSP:
+		return requested;
+	case NTLMv2:
+		return RawNTLMSSP;
+	case Unspecified:
+		if (server->sec_ntlmssp &&
+			(global_secflags & CIFSSEC_MAY_NTLMSSP))
+			return RawNTLMSSP;
+		if ((server->sec_kerberos || server->sec_mskerberos) &&
+			(global_secflags & CIFSSEC_MAY_KRB5))
+			return Kerberos;
+		fallthrough;
+	default:
+		return Unspecified;
+	}
+}
+
+struct SMB2_sess_data {
+	unsigned int xid;
+	struct cifs_ses *ses;
+	struct TCP_Server_Info *server;
+	struct nls_table *nls_cp;
+	void (*func)(struct SMB2_sess_data *);
+	int result;
+	u64 previous_session;
+
+	/* we will send the SMB in three pieces:
+	 * a fixed length beginning part, an optional
+	 * SPNEGO blob (which can be zero length), and a
+	 * last part which will include the strings
+	 * and rest of bcc area. This allows us to avoid
+	 * a large buffer 17K allocation
+	 */
+	int buf0_type;
+	struct kvec iov[2];
+};
+
+static int
+SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
+{
+	int rc;
+	struct cifs_ses *ses = sess_data->ses;
+	struct TCP_Server_Info *server = sess_data->server;
+	struct smb2_sess_setup_req *req;
+	unsigned int total_len;
+	bool is_binding = false;
+
+	rc = smb2_plain_req_init(SMB2_SESSION_SETUP, NULL, server,
+				 (void **) &req,
+				 &total_len);
+	if (rc)
+		return rc;
+
+	spin_lock(&ses->ses_lock);
+	is_binding = (ses->ses_status == SES_GOOD);
+	spin_unlock(&ses->ses_lock);
+
+	if (is_binding) {
+		req->hdr.SessionId = cpu_to_le64(ses->Suid);
+		req->hdr.Flags |= SMB2_FLAGS_SIGNED;
+		req->PreviousSessionId = 0;
+		req->Flags = SMB2_SESSION_REQ_FLAG_BINDING;
+		cifs_dbg(FYI, "Binding to sess id: %llx\n", ses->Suid);
+	} else {
+		/* First session, not a reauthenticate */
+		req->hdr.SessionId = 0;
+		/*
+		 * if reconnect, we need to send previous sess id
+		 * otherwise it is 0
+		 */
+		req->PreviousSessionId = cpu_to_le64(sess_data->previous_session);
+		req->Flags = 0; /* MBZ */
+		cifs_dbg(FYI, "Fresh session. Previous: %llx\n",
+			 sess_data->previous_session);
+	}
+
+	/* enough to enable echos and oplocks and one max size write */
+	if (server->credits >= server->max_credits)
+		req->hdr.CreditRequest = cpu_to_le16(0);
+	else
+		req->hdr.CreditRequest = cpu_to_le16(
+			min_t(int, server->max_credits -
+			      server->credits, 130));
+
+	/* only one of SMB2 signing flags may be set in SMB2 request */
+	if (server->sign)
+		req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
+	else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
+		req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
+	else
+		req->SecurityMode = 0;
+
+#ifdef CONFIG_CIFS_DFS_UPCALL
+	req->Capabilities = cpu_to_le32(SMB2_GLOBAL_CAP_DFS);
+#else
+	req->Capabilities = 0;
+#endif /* DFS_UPCALL */
+
+	req->Channel = 0; /* MBZ */
+
+	sess_data->iov[0].iov_base = (char *)req;
+	/* 1 for pad */
+	sess_data->iov[0].iov_len = total_len - 1;
+	/*
+	 * This variable will be used to clear the buffer
+	 * allocated above in case of any error in the calling function.
+	 */
+	sess_data->buf0_type = CIFS_SMALL_BUFFER;
+
+	return 0;
+}
+
+static void
+SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data)
+{
+	struct kvec *iov = sess_data->iov;
+
+	/* iov[1] is already freed by caller */
+	if (sess_data->buf0_type != CIFS_NO_BUFFER && iov[0].iov_base)
+		memzero_explicit(iov[0].iov_base, iov[0].iov_len);
+
+	free_rsp_buf(sess_data->buf0_type, iov[0].iov_base);
+	sess_data->buf0_type = CIFS_NO_BUFFER;
+}
+
+static int
+SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data)
+{
+	int rc;
+	struct smb_rqst rqst;
+	struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base;
+	struct kvec rsp_iov = { NULL, 0 };
+
+	/* Testing shows that buffer offset must be at location of Buffer[0] */
+	req->SecurityBufferOffset =
+		cpu_to_le16(sizeof(struct smb2_sess_setup_req));
+	req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len);
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	rqst.rq_iov = sess_data->iov;
+	rqst.rq_nvec = 2;
+
+	/* BB add code to build os and lm fields */
+	rc = cifs_send_recv(sess_data->xid, sess_data->ses,
+			    sess_data->server,
+			    &rqst,
+			    &sess_data->buf0_type,
+			    CIFS_LOG_ERROR | CIFS_SESS_OP, &rsp_iov);
+	cifs_small_buf_release(sess_data->iov[0].iov_base);
+	memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
+
+	return rc;
+}
+
+static int
+SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
+{
+	int rc = 0;
+	struct cifs_ses *ses = sess_data->ses;
+	struct TCP_Server_Info *server = sess_data->server;
+
+	cifs_server_lock(server);
+	if (server->ops->generate_signingkey) {
+		rc = server->ops->generate_signingkey(ses, server);
+		if (rc) {
+			cifs_dbg(FYI,
+				"SMB3 session key generation failed\n");
+			cifs_server_unlock(server);
+			return rc;
+		}
+	}
+	if (!server->session_estab) {
+		server->sequence_number = 0x2;
+		server->session_estab = true;
+	}
+	cifs_server_unlock(server);
+
+	cifs_dbg(FYI, "SMB2/3 session established successfully\n");
+	return rc;
+}
+
+#ifdef CONFIG_CIFS_UPCALL
+static void
+SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
+{
+	int rc;
+	struct cifs_ses *ses = sess_data->ses;
+	struct TCP_Server_Info *server = sess_data->server;
+	struct cifs_spnego_msg *msg;
+	struct key *spnego_key = NULL;
+	struct smb2_sess_setup_rsp *rsp = NULL;
+	bool is_binding = false;
+
+	rc = SMB2_sess_alloc_buffer(sess_data);
+	if (rc)
+		goto out;
+
+	spnego_key = cifs_get_spnego_key(ses, server);
+	if (IS_ERR(spnego_key)) {
+		rc = PTR_ERR(spnego_key);
+		if (rc == -ENOKEY)
+			cifs_dbg(VFS, "Verify user has a krb5 ticket and keyutils is installed\n");
+		spnego_key = NULL;
+		goto out;
+	}
+
+	msg = spnego_key->payload.data[0];
+	/*
+	 * check version field to make sure that cifs.upcall is
+	 * sending us a response in an expected form
+	 */
+	if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
+		cifs_dbg(VFS, "bad cifs.upcall version. Expected %d got %d\n",
+			 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
+		rc = -EKEYREJECTED;
+		goto out_put_spnego_key;
+	}
+
+	spin_lock(&ses->ses_lock);
+	is_binding = (ses->ses_status == SES_GOOD);
+	spin_unlock(&ses->ses_lock);
+
+	/* keep session key if binding */
+	if (!is_binding) {
+		kfree_sensitive(ses->auth_key.response);
+		ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
+						 GFP_KERNEL);
+		if (!ses->auth_key.response) {
+			cifs_dbg(VFS, "Kerberos can't allocate (%u bytes) memory\n",
+				 msg->sesskey_len);
+			rc = -ENOMEM;
+			goto out_put_spnego_key;
+		}
+		ses->auth_key.len = msg->sesskey_len;
+	}
+
+	sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
+	sess_data->iov[1].iov_len = msg->secblob_len;
+
+	rc = SMB2_sess_sendreceive(sess_data);
+	if (rc)
+		goto out_put_spnego_key;
+
+	rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
+	/* keep session id and flags if binding */
+	if (!is_binding) {
+		ses->Suid = le64_to_cpu(rsp->hdr.SessionId);
+		ses->session_flags = le16_to_cpu(rsp->SessionFlags);
+	}
+
+	rc = SMB2_sess_establish_session(sess_data);
+out_put_spnego_key:
+	key_invalidate(spnego_key);
+	key_put(spnego_key);
+	if (rc) {
+		kfree_sensitive(ses->auth_key.response);
+		ses->auth_key.response = NULL;
+		ses->auth_key.len = 0;
+	}
+out:
+	sess_data->result = rc;
+	sess_data->func = NULL;
+	SMB2_sess_free_buffer(sess_data);
+}
+#else
+static void
+SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
+{
+	cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
+	sess_data->result = -EOPNOTSUPP;
+	sess_data->func = NULL;
+}
+#endif
+
+static void
+SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data);
+
+static void
+SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
+{
+	int rc;
+	struct cifs_ses *ses = sess_data->ses;
+	struct TCP_Server_Info *server = sess_data->server;
+	struct smb2_sess_setup_rsp *rsp = NULL;
+	unsigned char *ntlmssp_blob = NULL;
+	bool use_spnego = false; /* else use raw ntlmssp */
+	u16 blob_length = 0;
+	bool is_binding = false;
+
+	/*
+	 * If memory allocation is successful, caller of this function
+	 * frees it.
+	 */
+	ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
+	if (!ses->ntlmssp) {
+		rc = -ENOMEM;
+		goto out_err;
+	}
+	ses->ntlmssp->sesskey_per_smbsess = true;
+
+	rc = SMB2_sess_alloc_buffer(sess_data);
+	if (rc)
+		goto out_err;
+
+	rc = build_ntlmssp_smb3_negotiate_blob(&ntlmssp_blob,
+					  &blob_length, ses, server,
+					  sess_data->nls_cp);
+	if (rc)
+		goto out;
+
+	if (use_spnego) {
+		/* BB eventually need to add this */
+		cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
+		rc = -EOPNOTSUPP;
+		goto out;
+	}
+	sess_data->iov[1].iov_base = ntlmssp_blob;
+	sess_data->iov[1].iov_len = blob_length;
+
+	rc = SMB2_sess_sendreceive(sess_data);
+	rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
+
+	/* If true, rc here is expected and not an error */
+	if (sess_data->buf0_type != CIFS_NO_BUFFER &&
+		rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
+		rc = 0;
+
+	if (rc)
+		goto out;
+
+	if (offsetof(struct smb2_sess_setup_rsp, Buffer) !=
+			le16_to_cpu(rsp->SecurityBufferOffset)) {
+		cifs_dbg(VFS, "Invalid security buffer offset %d\n",
+			le16_to_cpu(rsp->SecurityBufferOffset));
+		rc = -EIO;
+		goto out;
+	}
+	rc = decode_ntlmssp_challenge(rsp->Buffer,
+			le16_to_cpu(rsp->SecurityBufferLength), ses);
+	if (rc)
+		goto out;
+
+	cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
+
+	spin_lock(&ses->ses_lock);
+	is_binding = (ses->ses_status == SES_GOOD);
+	spin_unlock(&ses->ses_lock);
+
+	/* keep existing ses id and flags if binding */
+	if (!is_binding) {
+		ses->Suid = le64_to_cpu(rsp->hdr.SessionId);
+		ses->session_flags = le16_to_cpu(rsp->SessionFlags);
+	}
+
+out:
+	kfree_sensitive(ntlmssp_blob);
+	SMB2_sess_free_buffer(sess_data);
+	if (!rc) {
+		sess_data->result = 0;
+		sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate;
+		return;
+	}
+out_err:
+	kfree_sensitive(ses->ntlmssp);
+	ses->ntlmssp = NULL;
+	sess_data->result = rc;
+	sess_data->func = NULL;
+}
+
+static void
+SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
+{
+	int rc;
+	struct cifs_ses *ses = sess_data->ses;
+	struct TCP_Server_Info *server = sess_data->server;
+	struct smb2_sess_setup_req *req;
+	struct smb2_sess_setup_rsp *rsp = NULL;
+	unsigned char *ntlmssp_blob = NULL;
+	bool use_spnego = false; /* else use raw ntlmssp */
+	u16 blob_length = 0;
+	bool is_binding = false;
+
+	rc = SMB2_sess_alloc_buffer(sess_data);
+	if (rc)
+		goto out;
+
+	req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
+	req->hdr.SessionId = cpu_to_le64(ses->Suid);
+
+	rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length,
+				     ses, server,
+				     sess_data->nls_cp);
+	if (rc) {
+		cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc);
+		goto out;
+	}
+
+	if (use_spnego) {
+		/* BB eventually need to add this */
+		cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
+		rc = -EOPNOTSUPP;
+		goto out;
+	}
+	sess_data->iov[1].iov_base = ntlmssp_blob;
+	sess_data->iov[1].iov_len = blob_length;
+
+	rc = SMB2_sess_sendreceive(sess_data);
+	if (rc)
+		goto out;
+
+	rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
+
+	spin_lock(&ses->ses_lock);
+	is_binding = (ses->ses_status == SES_GOOD);
+	spin_unlock(&ses->ses_lock);
+
+	/* keep existing ses id and flags if binding */
+	if (!is_binding) {
+		ses->Suid = le64_to_cpu(rsp->hdr.SessionId);
+		ses->session_flags = le16_to_cpu(rsp->SessionFlags);
+	}
+
+	rc = SMB2_sess_establish_session(sess_data);
+#ifdef CONFIG_CIFS_DEBUG_DUMP_KEYS
+	if (ses->server->dialect < SMB30_PROT_ID) {
+		cifs_dbg(VFS, "%s: dumping generated SMB2 session keys\n", __func__);
+		/*
+		 * The session id is opaque in terms of endianness, so we can't
+		 * print it as a long long. we dump it as we got it on the wire
+		 */
+		cifs_dbg(VFS, "Session Id    %*ph\n", (int)sizeof(ses->Suid),
+			 &ses->Suid);
+		cifs_dbg(VFS, "Session Key   %*ph\n",
+			 SMB2_NTLMV2_SESSKEY_SIZE, ses->auth_key.response);
+		cifs_dbg(VFS, "Signing Key   %*ph\n",
+			 SMB3_SIGN_KEY_SIZE, ses->auth_key.response);
+	}
+#endif
+out:
+	kfree_sensitive(ntlmssp_blob);
+	SMB2_sess_free_buffer(sess_data);
+	kfree_sensitive(ses->ntlmssp);
+	ses->ntlmssp = NULL;
+	sess_data->result = rc;
+	sess_data->func = NULL;
+}
+
+static int
+SMB2_select_sec(struct SMB2_sess_data *sess_data)
+{
+	int type;
+	struct cifs_ses *ses = sess_data->ses;
+	struct TCP_Server_Info *server = sess_data->server;
+
+	type = smb2_select_sectype(server, ses->sectype);
+	cifs_dbg(FYI, "sess setup type %d\n", type);
+	if (type == Unspecified) {
+		cifs_dbg(VFS, "Unable to select appropriate authentication method!\n");
+		return -EINVAL;
+	}
+
+	switch (type) {
+	case Kerberos:
+		sess_data->func = SMB2_auth_kerberos;
+		break;
+	case RawNTLMSSP:
+		sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate;
+		break;
+	default:
+		cifs_dbg(VFS, "secType %d not supported!\n", type);
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+int
+SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
+		struct TCP_Server_Info *server,
+		const struct nls_table *nls_cp)
+{
+	int rc = 0;
+	struct SMB2_sess_data *sess_data;
+
+	cifs_dbg(FYI, "Session Setup\n");
+
+	if (!server) {
+		WARN(1, "%s: server is NULL!\n", __func__);
+		return -EIO;
+	}
+
+	sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
+	if (!sess_data)
+		return -ENOMEM;
+
+	sess_data->xid = xid;
+	sess_data->ses = ses;
+	sess_data->server = server;
+	sess_data->buf0_type = CIFS_NO_BUFFER;
+	sess_data->nls_cp = (struct nls_table *) nls_cp;
+	sess_data->previous_session = ses->Suid;
+
+	rc = SMB2_select_sec(sess_data);
+	if (rc)
+		goto out;
+
+	/*
+	 * Initialize the session hash with the server one.
+	 */
+	memcpy(ses->preauth_sha_hash, server->preauth_sha_hash,
+	       SMB2_PREAUTH_HASH_SIZE);
+
+	while (sess_data->func)
+		sess_data->func(sess_data);
+
+	if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign))
+		cifs_server_dbg(VFS, "signing requested but authenticated as guest\n");
+	rc = sess_data->result;
+out:
+	kfree_sensitive(sess_data);
+	return rc;
+}
+
+int
+SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
+{
+	struct smb_rqst rqst;
+	struct smb2_logoff_req *req; /* response is also trivial struct */
+	int rc = 0;
+	struct TCP_Server_Info *server;
+	int flags = 0;
+	unsigned int total_len;
+	struct kvec iov[1];
+	struct kvec rsp_iov;
+	int resp_buf_type;
+
+	cifs_dbg(FYI, "disconnect session %p\n", ses);
+
+	if (ses && (ses->server))
+		server = ses->server;
+	else
+		return -EIO;
+
+	/* no need to send SMB logoff if uid already closed due to reconnect */
+	spin_lock(&ses->chan_lock);
+	if (CIFS_ALL_CHANS_NEED_RECONNECT(ses)) {
+		spin_unlock(&ses->chan_lock);
+		goto smb2_session_already_dead;
+	}
+	spin_unlock(&ses->chan_lock);
+
+	rc = smb2_plain_req_init(SMB2_LOGOFF, NULL, ses->server,
+				 (void **) &req, &total_len);
+	if (rc)
+		return rc;
+
+	 /* since no tcon, smb2_init can not do this, so do here */
+	req->hdr.SessionId = cpu_to_le64(ses->Suid);
+
+	if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
+		flags |= CIFS_TRANSFORM_REQ;
+	else if (server->sign)
+		req->hdr.Flags |= SMB2_FLAGS_SIGNED;
+
+	flags |= CIFS_NO_RSP_BUF;
+
+	iov[0].iov_base = (char *)req;
+	iov[0].iov_len = total_len;
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	rqst.rq_iov = iov;
+	rqst.rq_nvec = 1;
+
+	rc = cifs_send_recv(xid, ses, ses->server,
+			    &rqst, &resp_buf_type, flags, &rsp_iov);
+	cifs_small_buf_release(req);
+	/*
+	 * No tcon so can't do
+	 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
+	 */
+
+smb2_session_already_dead:
+	return rc;
+}
+
+static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
+{
+	cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
+}
+
+#define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
+
+/* These are similar values to what Windows uses */
+static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
+{
+	tcon->max_chunks = 256;
+	tcon->max_bytes_chunk = 1048576;
+	tcon->max_bytes_copy = 16777216;
+}
+
+int
+SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
+	  struct cifs_tcon *tcon, const struct nls_table *cp)
+{
+	struct smb_rqst rqst;
+	struct smb2_tree_connect_req *req;
+	struct smb2_tree_connect_rsp *rsp = NULL;
+	struct kvec iov[2];
+	struct kvec rsp_iov = { NULL, 0 };
+	int rc = 0;
+	int resp_buftype;
+	int unc_path_len;
+	__le16 *unc_path = NULL;
+	int flags = 0;
+	unsigned int total_len;
+	struct TCP_Server_Info *server;
+
+	/* always use master channel */
+	server = ses->server;
+
+	cifs_dbg(FYI, "TCON\n");
+
+	if (!server || !tree)
+		return -EIO;
+
+	unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
+	if (unc_path == NULL)
+		return -ENOMEM;
+
+	unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp);
+	if (unc_path_len <= 0) {
+		kfree(unc_path);
+		return -EINVAL;
+	}
+	unc_path_len *= 2;
+
+	/* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
+	tcon->tid = 0;
+	atomic_set(&tcon->num_remote_opens, 0);
+	rc = smb2_plain_req_init(SMB2_TREE_CONNECT, tcon, server,
+				 (void **) &req, &total_len);
+	if (rc) {
+		kfree(unc_path);
+		return rc;
+	}
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	iov[0].iov_base = (char *)req;
+	/* 1 for pad */
+	iov[0].iov_len = total_len - 1;
+
+	/* Testing shows that buffer offset must be at location of Buffer[0] */
+	req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req));
+	req->PathLength = cpu_to_le16(unc_path_len);
+	iov[1].iov_base = unc_path;
+	iov[1].iov_len = unc_path_len;
+
+	/*
+	 * 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1
+	 * unless it is guest or anonymous user. See MS-SMB2 3.2.5.3.1
+	 * (Samba servers don't always set the flag so also check if null user)
+	 */
+	if ((server->dialect == SMB311_PROT_ID) &&
+	    !smb3_encryption_required(tcon) &&
+	    !(ses->session_flags &
+		    (SMB2_SESSION_FLAG_IS_GUEST|SMB2_SESSION_FLAG_IS_NULL)) &&
+	    ((ses->user_name != NULL) || (ses->sectype == Kerberos)))
+		req->hdr.Flags |= SMB2_FLAGS_SIGNED;
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	rqst.rq_iov = iov;
+	rqst.rq_nvec = 2;
+
+	/* Need 64 for max size write so ask for more in case not there yet */
+	if (server->credits >= server->max_credits)
+		req->hdr.CreditRequest = cpu_to_le16(0);
+	else
+		req->hdr.CreditRequest = cpu_to_le16(
+			min_t(int, server->max_credits -
+			      server->credits, 64));
+
+	rc = cifs_send_recv(xid, ses, server,
+			    &rqst, &resp_buftype, flags, &rsp_iov);
+	cifs_small_buf_release(req);
+	rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
+	trace_smb3_tcon(xid, tcon->tid, ses->Suid, tree, rc);
+	if ((rc != 0) || (rsp == NULL)) {
+		cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
+		tcon->need_reconnect = true;
+		goto tcon_error_exit;
+	}
+
+	switch (rsp->ShareType) {
+	case SMB2_SHARE_TYPE_DISK:
+		cifs_dbg(FYI, "connection to disk share\n");
+		break;
+	case SMB2_SHARE_TYPE_PIPE:
+		tcon->pipe = true;
+		cifs_dbg(FYI, "connection to pipe share\n");
+		break;
+	case SMB2_SHARE_TYPE_PRINT:
+		tcon->print = true;
+		cifs_dbg(FYI, "connection to printer\n");
+		break;
+	default:
+		cifs_server_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
+		rc = -EOPNOTSUPP;
+		goto tcon_error_exit;
+	}
+
+	tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
+	tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
+	tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
+	tcon->tid = le32_to_cpu(rsp->hdr.Id.SyncId.TreeId);
+	strscpy(tcon->tree_name, tree, sizeof(tcon->tree_name));
+
+	if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
+	    ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
+		cifs_tcon_dbg(VFS, "DFS capability contradicts DFS flag\n");
+
+	if (tcon->seal &&
+	    !(server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
+		cifs_tcon_dbg(VFS, "Encryption is requested but not supported\n");
+
+	init_copy_chunk_defaults(tcon);
+	if (server->ops->validate_negotiate)
+		rc = server->ops->validate_negotiate(xid, tcon);
+	if (rc == 0) /* See MS-SMB2 2.2.10 and 3.2.5.5 */
+		if (tcon->share_flags & SMB2_SHAREFLAG_ISOLATED_TRANSPORT)
+			server->nosharesock = true;
+tcon_exit:
+
+	free_rsp_buf(resp_buftype, rsp);
+	kfree(unc_path);
+	return rc;
+
+tcon_error_exit:
+	if (rsp && rsp->hdr.Status == STATUS_BAD_NETWORK_NAME)
+		cifs_tcon_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
+	goto tcon_exit;
+}
+
+int
+SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
+{
+	struct smb_rqst rqst;
+	struct smb2_tree_disconnect_req *req; /* response is trivial */
+	int rc = 0;
+	struct cifs_ses *ses = tcon->ses;
+	int flags = 0;
+	unsigned int total_len;
+	struct kvec iov[1];
+	struct kvec rsp_iov;
+	int resp_buf_type;
+
+	cifs_dbg(FYI, "Tree Disconnect\n");
+
+	if (!ses || !(ses->server))
+		return -EIO;
+
+	trace_smb3_tdis_enter(xid, tcon->tid, ses->Suid, tcon->tree_name);
+	spin_lock(&ses->chan_lock);
+	if ((tcon->need_reconnect) ||
+	    (CIFS_ALL_CHANS_NEED_RECONNECT(tcon->ses))) {
+		spin_unlock(&ses->chan_lock);
+		return 0;
+	}
+	spin_unlock(&ses->chan_lock);
+
+	invalidate_all_cached_dirs(tcon);
+
+	rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, ses->server,
+				 (void **) &req,
+				 &total_len);
+	if (rc)
+		return rc;
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	flags |= CIFS_NO_RSP_BUF;
+
+	iov[0].iov_base = (char *)req;
+	iov[0].iov_len = total_len;
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	rqst.rq_iov = iov;
+	rqst.rq_nvec = 1;
+
+	rc = cifs_send_recv(xid, ses, ses->server,
+			    &rqst, &resp_buf_type, flags, &rsp_iov);
+	cifs_small_buf_release(req);
+	if (rc) {
+		cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
+		trace_smb3_tdis_err(xid, tcon->tid, ses->Suid, rc);
+	}
+	trace_smb3_tdis_done(xid, tcon->tid, ses->Suid);
+
+	return rc;
+}
+
+
+static struct create_durable *
+create_durable_buf(void)
+{
+	struct create_durable *buf;
+
+	buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
+	if (!buf)
+		return NULL;
+
+	buf->ccontext.DataOffset = cpu_to_le16(offsetof
+					(struct create_durable, Data));
+	buf->ccontext.DataLength = cpu_to_le32(16);
+	buf->ccontext.NameOffset = cpu_to_le16(offsetof
+				(struct create_durable, Name));
+	buf->ccontext.NameLength = cpu_to_le16(4);
+	/* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
+	buf->Name[0] = 'D';
+	buf->Name[1] = 'H';
+	buf->Name[2] = 'n';
+	buf->Name[3] = 'Q';
+	return buf;
+}
+
+static struct create_durable *
+create_reconnect_durable_buf(struct cifs_fid *fid)
+{
+	struct create_durable *buf;
+
+	buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
+	if (!buf)
+		return NULL;
+
+	buf->ccontext.DataOffset = cpu_to_le16(offsetof
+					(struct create_durable, Data));
+	buf->ccontext.DataLength = cpu_to_le32(16);
+	buf->ccontext.NameOffset = cpu_to_le16(offsetof
+				(struct create_durable, Name));
+	buf->ccontext.NameLength = cpu_to_le16(4);
+	buf->Data.Fid.PersistentFileId = fid->persistent_fid;
+	buf->Data.Fid.VolatileFileId = fid->volatile_fid;
+	/* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
+	buf->Name[0] = 'D';
+	buf->Name[1] = 'H';
+	buf->Name[2] = 'n';
+	buf->Name[3] = 'C';
+	return buf;
+}
+
+static void
+parse_query_id_ctxt(struct create_context *cc, struct smb2_file_all_info *buf)
+{
+	struct create_disk_id_rsp *pdisk_id = (struct create_disk_id_rsp *)cc;
+
+	cifs_dbg(FYI, "parse query id context 0x%llx 0x%llx\n",
+		pdisk_id->DiskFileId, pdisk_id->VolumeId);
+	buf->IndexNumber = pdisk_id->DiskFileId;
+}
+
+static void
+parse_posix_ctxt(struct create_context *cc, struct smb2_file_all_info *info,
+		 struct create_posix_rsp *posix)
+{
+	int sid_len;
+	u8 *beg = (u8 *)cc + le16_to_cpu(cc->DataOffset);
+	u8 *end = beg + le32_to_cpu(cc->DataLength);
+	u8 *sid;
+
+	memset(posix, 0, sizeof(*posix));
+
+	posix->nlink = le32_to_cpu(*(__le32 *)(beg + 0));
+	posix->reparse_tag = le32_to_cpu(*(__le32 *)(beg + 4));
+	posix->mode = le32_to_cpu(*(__le32 *)(beg + 8));
+
+	sid = beg + 12;
+	sid_len = posix_info_sid_size(sid, end);
+	if (sid_len < 0) {
+		cifs_dbg(VFS, "bad owner sid in posix create response\n");
+		return;
+	}
+	memcpy(&posix->owner, sid, sid_len);
+
+	sid = sid + sid_len;
+	sid_len = posix_info_sid_size(sid, end);
+	if (sid_len < 0) {
+		cifs_dbg(VFS, "bad group sid in posix create response\n");
+		return;
+	}
+	memcpy(&posix->group, sid, sid_len);
+
+	cifs_dbg(FYI, "nlink=%d mode=%o reparse_tag=%x\n",
+		 posix->nlink, posix->mode, posix->reparse_tag);
+}
+
+int smb2_parse_contexts(struct TCP_Server_Info *server,
+			struct kvec *rsp_iov,
+			unsigned int *epoch,
+			char *lease_key, __u8 *oplock,
+			struct smb2_file_all_info *buf,
+			struct create_posix_rsp *posix)
+{
+	struct smb2_create_rsp *rsp = rsp_iov->iov_base;
+	struct create_context *cc;
+	size_t rem, off, len;
+	size_t doff, dlen;
+	size_t noff, nlen;
+	char *name;
+	static const char smb3_create_tag_posix[] = {
+		0x93, 0xAD, 0x25, 0x50, 0x9C,
+		0xB4, 0x11, 0xE7, 0xB4, 0x23, 0x83,
+		0xDE, 0x96, 0x8B, 0xCD, 0x7C
+	};
+
+	*oplock = 0;
+
+	off = le32_to_cpu(rsp->CreateContextsOffset);
+	rem = le32_to_cpu(rsp->CreateContextsLength);
+	if (check_add_overflow(off, rem, &len) || len > rsp_iov->iov_len)
+		return -EINVAL;
+	cc = (struct create_context *)((u8 *)rsp + off);
+
+	/* Initialize inode number to 0 in case no valid data in qfid context */
+	if (buf)
+		buf->IndexNumber = 0;
+
+	while (rem >= sizeof(*cc)) {
+		doff = le16_to_cpu(cc->DataOffset);
+		dlen = le32_to_cpu(cc->DataLength);
+		if (check_add_overflow(doff, dlen, &len) || len > rem)
+			return -EINVAL;
+
+		noff = le16_to_cpu(cc->NameOffset);
+		nlen = le16_to_cpu(cc->NameLength);
+		if (noff + nlen > doff)
+			return -EINVAL;
+
+		name = (char *)cc + noff;
+		switch (nlen) {
+		case 4:
+			if (!strncmp(name, SMB2_CREATE_REQUEST_LEASE, 4)) {
+				*oplock = server->ops->parse_lease_buf(cc, epoch,
+								       lease_key);
+			} else if (buf &&
+				   !strncmp(name, SMB2_CREATE_QUERY_ON_DISK_ID, 4)) {
+				parse_query_id_ctxt(cc, buf);
+			}
+			break;
+		case 16:
+			if (posix && !memcmp(name, smb3_create_tag_posix, 16))
+				parse_posix_ctxt(cc, buf, posix);
+			break;
+		default:
+			cifs_dbg(FYI, "%s: unhandled context (nlen=%zu dlen=%zu)\n",
+				 __func__, nlen, dlen);
+			if (IS_ENABLED(CONFIG_CIFS_DEBUG2))
+				cifs_dump_mem("context data: ", cc, dlen);
+			break;
+		}
+
+		off = le32_to_cpu(cc->Next);
+		if (!off)
+			break;
+		if (check_sub_overflow(rem, off, &rem))
+			return -EINVAL;
+		cc = (struct create_context *)((u8 *)cc + off);
+	}
+
+	if (rsp->OplockLevel != SMB2_OPLOCK_LEVEL_LEASE)
+		*oplock = rsp->OplockLevel;
+
+	return 0;
+}
+
+static int
+add_lease_context(struct TCP_Server_Info *server,
+		  struct smb2_create_req *req,
+		  struct kvec *iov,
+		  unsigned int *num_iovec, u8 *lease_key, __u8 *oplock)
+{
+	unsigned int num = *num_iovec;
+
+	iov[num].iov_base = server->ops->create_lease_buf(lease_key, *oplock);
+	if (iov[num].iov_base == NULL)
+		return -ENOMEM;
+	iov[num].iov_len = server->vals->create_lease_size;
+	req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
+	*num_iovec = num + 1;
+	return 0;
+}
+
+static struct create_durable_v2 *
+create_durable_v2_buf(struct cifs_open_parms *oparms)
+{
+	struct cifs_fid *pfid = oparms->fid;
+	struct create_durable_v2 *buf;
+
+	buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
+	if (!buf)
+		return NULL;
+
+	buf->ccontext.DataOffset = cpu_to_le16(offsetof
+					(struct create_durable_v2, dcontext));
+	buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
+	buf->ccontext.NameOffset = cpu_to_le16(offsetof
+				(struct create_durable_v2, Name));
+	buf->ccontext.NameLength = cpu_to_le16(4);
+
+	/*
+	 * NB: Handle timeout defaults to 0, which allows server to choose
+	 * (most servers default to 120 seconds) and most clients default to 0.
+	 * This can be overridden at mount ("handletimeout=") if the user wants
+	 * a different persistent (or resilient) handle timeout for all opens
+	 * on a particular SMB3 mount.
+	 */
+	buf->dcontext.Timeout = cpu_to_le32(oparms->tcon->handle_timeout);
+	buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
+	generate_random_uuid(buf->dcontext.CreateGuid);
+	memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
+
+	/* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
+	buf->Name[0] = 'D';
+	buf->Name[1] = 'H';
+	buf->Name[2] = '2';
+	buf->Name[3] = 'Q';
+	return buf;
+}
+
+static struct create_durable_handle_reconnect_v2 *
+create_reconnect_durable_v2_buf(struct cifs_fid *fid)
+{
+	struct create_durable_handle_reconnect_v2 *buf;
+
+	buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
+			GFP_KERNEL);
+	if (!buf)
+		return NULL;
+
+	buf->ccontext.DataOffset =
+		cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
+				     dcontext));
+	buf->ccontext.DataLength =
+		cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
+	buf->ccontext.NameOffset =
+		cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
+			    Name));
+	buf->ccontext.NameLength = cpu_to_le16(4);
+
+	buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
+	buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
+	buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
+	memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
+
+	/* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
+	buf->Name[0] = 'D';
+	buf->Name[1] = 'H';
+	buf->Name[2] = '2';
+	buf->Name[3] = 'C';
+	return buf;
+}
+
+static int
+add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
+		    struct cifs_open_parms *oparms)
+{
+	unsigned int num = *num_iovec;
+
+	iov[num].iov_base = create_durable_v2_buf(oparms);
+	if (iov[num].iov_base == NULL)
+		return -ENOMEM;
+	iov[num].iov_len = sizeof(struct create_durable_v2);
+	*num_iovec = num + 1;
+	return 0;
+}
+
+static int
+add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
+		    struct cifs_open_parms *oparms)
+{
+	unsigned int num = *num_iovec;
+
+	/* indicate that we don't need to relock the file */
+	oparms->reconnect = false;
+
+	iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
+	if (iov[num].iov_base == NULL)
+		return -ENOMEM;
+	iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
+	*num_iovec = num + 1;
+	return 0;
+}
+
+static int
+add_durable_context(struct kvec *iov, unsigned int *num_iovec,
+		    struct cifs_open_parms *oparms, bool use_persistent)
+{
+	unsigned int num = *num_iovec;
+
+	if (use_persistent) {
+		if (oparms->reconnect)
+			return add_durable_reconnect_v2_context(iov, num_iovec,
+								oparms);
+		else
+			return add_durable_v2_context(iov, num_iovec, oparms);
+	}
+
+	if (oparms->reconnect) {
+		iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
+		/* indicate that we don't need to relock the file */
+		oparms->reconnect = false;
+	} else
+		iov[num].iov_base = create_durable_buf();
+	if (iov[num].iov_base == NULL)
+		return -ENOMEM;
+	iov[num].iov_len = sizeof(struct create_durable);
+	*num_iovec = num + 1;
+	return 0;
+}
+
+/* See MS-SMB2 2.2.13.2.7 */
+static struct crt_twarp_ctxt *
+create_twarp_buf(__u64 timewarp)
+{
+	struct crt_twarp_ctxt *buf;
+
+	buf = kzalloc(sizeof(struct crt_twarp_ctxt), GFP_KERNEL);
+	if (!buf)
+		return NULL;
+
+	buf->ccontext.DataOffset = cpu_to_le16(offsetof
+					(struct crt_twarp_ctxt, Timestamp));
+	buf->ccontext.DataLength = cpu_to_le32(8);
+	buf->ccontext.NameOffset = cpu_to_le16(offsetof
+				(struct crt_twarp_ctxt, Name));
+	buf->ccontext.NameLength = cpu_to_le16(4);
+	/* SMB2_CREATE_TIMEWARP_TOKEN is "TWrp" */
+	buf->Name[0] = 'T';
+	buf->Name[1] = 'W';
+	buf->Name[2] = 'r';
+	buf->Name[3] = 'p';
+	buf->Timestamp = cpu_to_le64(timewarp);
+	return buf;
+}
+
+/* See MS-SMB2 2.2.13.2.7 */
+static int
+add_twarp_context(struct kvec *iov, unsigned int *num_iovec, __u64 timewarp)
+{
+	unsigned int num = *num_iovec;
+
+	iov[num].iov_base = create_twarp_buf(timewarp);
+	if (iov[num].iov_base == NULL)
+		return -ENOMEM;
+	iov[num].iov_len = sizeof(struct crt_twarp_ctxt);
+	*num_iovec = num + 1;
+	return 0;
+}
+
+/* See http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx */
+static void setup_owner_group_sids(char *buf)
+{
+	struct owner_group_sids *sids = (struct owner_group_sids *)buf;
+
+	/* Populate the user ownership fields S-1-5-88-1 */
+	sids->owner.Revision = 1;
+	sids->owner.NumAuth = 3;
+	sids->owner.Authority[5] = 5;
+	sids->owner.SubAuthorities[0] = cpu_to_le32(88);
+	sids->owner.SubAuthorities[1] = cpu_to_le32(1);
+	sids->owner.SubAuthorities[2] = cpu_to_le32(current_fsuid().val);
+
+	/* Populate the group ownership fields S-1-5-88-2 */
+	sids->group.Revision = 1;
+	sids->group.NumAuth = 3;
+	sids->group.Authority[5] = 5;
+	sids->group.SubAuthorities[0] = cpu_to_le32(88);
+	sids->group.SubAuthorities[1] = cpu_to_le32(2);
+	sids->group.SubAuthorities[2] = cpu_to_le32(current_fsgid().val);
+
+	cifs_dbg(FYI, "owner S-1-5-88-1-%d, group S-1-5-88-2-%d\n", current_fsuid().val, current_fsgid().val);
+}
+
+/* See MS-SMB2 2.2.13.2.2 and MS-DTYP 2.4.6 */
+static struct crt_sd_ctxt *
+create_sd_buf(umode_t mode, bool set_owner, unsigned int *len)
+{
+	struct crt_sd_ctxt *buf;
+	__u8 *ptr, *aclptr;
+	unsigned int acelen, acl_size, ace_count;
+	unsigned int owner_offset = 0;
+	unsigned int group_offset = 0;
+	struct smb3_acl acl = {};
+
+	*len = round_up(sizeof(struct crt_sd_ctxt) + (sizeof(struct cifs_ace) * 4), 8);
+
+	if (set_owner) {
+		/* sizeof(struct owner_group_sids) is already multiple of 8 so no need to round */
+		*len += sizeof(struct owner_group_sids);
+	}
+
+	buf = kzalloc(*len, GFP_KERNEL);
+	if (buf == NULL)
+		return buf;
+
+	ptr = (__u8 *)&buf[1];
+	if (set_owner) {
+		/* offset fields are from beginning of security descriptor not of create context */
+		owner_offset = ptr - (__u8 *)&buf->sd;
+		buf->sd.OffsetOwner = cpu_to_le32(owner_offset);
+		group_offset = owner_offset + offsetof(struct owner_group_sids, group);
+		buf->sd.OffsetGroup = cpu_to_le32(group_offset);
+
+		setup_owner_group_sids(ptr);
+		ptr += sizeof(struct owner_group_sids);
+	} else {
+		buf->sd.OffsetOwner = 0;
+		buf->sd.OffsetGroup = 0;
+	}
+
+	buf->ccontext.DataOffset = cpu_to_le16(offsetof(struct crt_sd_ctxt, sd));
+	buf->ccontext.NameOffset = cpu_to_le16(offsetof(struct crt_sd_ctxt, Name));
+	buf->ccontext.NameLength = cpu_to_le16(4);
+	/* SMB2_CREATE_SD_BUFFER_TOKEN is "SecD" */
+	buf->Name[0] = 'S';
+	buf->Name[1] = 'e';
+	buf->Name[2] = 'c';
+	buf->Name[3] = 'D';
+	buf->sd.Revision = 1;  /* Must be one see MS-DTYP 2.4.6 */
+
+	/*
+	 * ACL is "self relative" ie ACL is stored in contiguous block of memory
+	 * and "DP" ie the DACL is present
+	 */
+	buf->sd.Control = cpu_to_le16(ACL_CONTROL_SR | ACL_CONTROL_DP);
+
+	/* offset owner, group and Sbz1 and SACL are all zero */
+	buf->sd.OffsetDacl = cpu_to_le32(ptr - (__u8 *)&buf->sd);
+	/* Ship the ACL for now. we will copy it into buf later. */
+	aclptr = ptr;
+	ptr += sizeof(struct smb3_acl);
+
+	/* create one ACE to hold the mode embedded in reserved special SID */
+	acelen = setup_special_mode_ACE((struct cifs_ace *)ptr, (__u64)mode);
+	ptr += acelen;
+	acl_size = acelen + sizeof(struct smb3_acl);
+	ace_count = 1;
+
+	if (set_owner) {
+		/* we do not need to reallocate buffer to add the two more ACEs. plenty of space */
+		acelen = setup_special_user_owner_ACE((struct cifs_ace *)ptr);
+		ptr += acelen;
+		acl_size += acelen;
+		ace_count += 1;
+	}
+
+	/* and one more ACE to allow access for authenticated users */
+	acelen = setup_authusers_ACE((struct cifs_ace *)ptr);
+	ptr += acelen;
+	acl_size += acelen;
+	ace_count += 1;
+
+	acl.AclRevision = ACL_REVISION; /* See 2.4.4.1 of MS-DTYP */
+	acl.AclSize = cpu_to_le16(acl_size);
+	acl.AceCount = cpu_to_le16(ace_count);
+	/* acl.Sbz1 and Sbz2 MBZ so are not set here, but initialized above */
+	memcpy(aclptr, &acl, sizeof(struct smb3_acl));
+
+	buf->ccontext.DataLength = cpu_to_le32(ptr - (__u8 *)&buf->sd);
+	*len = round_up((unsigned int)(ptr - (__u8 *)buf), 8);
+
+	return buf;
+}
+
+static int
+add_sd_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode, bool set_owner)
+{
+	unsigned int num = *num_iovec;
+	unsigned int len = 0;
+
+	iov[num].iov_base = create_sd_buf(mode, set_owner, &len);
+	if (iov[num].iov_base == NULL)
+		return -ENOMEM;
+	iov[num].iov_len = len;
+	*num_iovec = num + 1;
+	return 0;
+}
+
+static struct crt_query_id_ctxt *
+create_query_id_buf(void)
+{
+	struct crt_query_id_ctxt *buf;
+
+	buf = kzalloc(sizeof(struct crt_query_id_ctxt), GFP_KERNEL);
+	if (!buf)
+		return NULL;
+
+	buf->ccontext.DataOffset = cpu_to_le16(0);
+	buf->ccontext.DataLength = cpu_to_le32(0);
+	buf->ccontext.NameOffset = cpu_to_le16(offsetof
+				(struct crt_query_id_ctxt, Name));
+	buf->ccontext.NameLength = cpu_to_le16(4);
+	/* SMB2_CREATE_QUERY_ON_DISK_ID is "QFid" */
+	buf->Name[0] = 'Q';
+	buf->Name[1] = 'F';
+	buf->Name[2] = 'i';
+	buf->Name[3] = 'd';
+	return buf;
+}
+
+/* See MS-SMB2 2.2.13.2.9 */
+static int
+add_query_id_context(struct kvec *iov, unsigned int *num_iovec)
+{
+	unsigned int num = *num_iovec;
+
+	iov[num].iov_base = create_query_id_buf();
+	if (iov[num].iov_base == NULL)
+		return -ENOMEM;
+	iov[num].iov_len = sizeof(struct crt_query_id_ctxt);
+	*num_iovec = num + 1;
+	return 0;
+}
+
+static int
+alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len,
+			    const char *treename, const __le16 *path)
+{
+	int treename_len, path_len;
+	struct nls_table *cp;
+	const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
+
+	/*
+	 * skip leading "\\"
+	 */
+	treename_len = strlen(treename);
+	if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\'))
+		return -EINVAL;
+
+	treename += 2;
+	treename_len -= 2;
+
+	path_len = UniStrnlen((wchar_t *)path, PATH_MAX);
+
+	/* make room for one path separator only if @path isn't empty */
+	*out_len = treename_len + (path[0] ? 1 : 0) + path_len;
+
+	/*
+	 * final path needs to be 8-byte aligned as specified in
+	 * MS-SMB2 2.2.13 SMB2 CREATE Request.
+	 */
+	*out_size = round_up(*out_len * sizeof(__le16), 8);
+	*out_path = kzalloc(*out_size + sizeof(__le16) /* null */, GFP_KERNEL);
+	if (!*out_path)
+		return -ENOMEM;
+
+	cp = load_nls_default();
+	cifs_strtoUTF16(*out_path, treename, treename_len, cp);
+
+	/* Do not append the separator if the path is empty */
+	if (path[0] != cpu_to_le16(0x0000)) {
+		UniStrcat((wchar_t *)*out_path, (wchar_t *)sep);
+		UniStrcat((wchar_t *)*out_path, (wchar_t *)path);
+	}
+
+	unload_nls(cp);
+
+	return 0;
+}
+
+int smb311_posix_mkdir(const unsigned int xid, struct inode *inode,
+			       umode_t mode, struct cifs_tcon *tcon,
+			       const char *full_path,
+			       struct cifs_sb_info *cifs_sb)
+{
+	struct smb_rqst rqst;
+	struct smb2_create_req *req;
+	struct smb2_create_rsp *rsp = NULL;
+	struct cifs_ses *ses = tcon->ses;
+	struct kvec iov[3]; /* make sure at least one for each open context */
+	struct kvec rsp_iov = {NULL, 0};
+	int resp_buftype;
+	int uni_path_len;
+	__le16 *copy_path = NULL;
+	int copy_size;
+	int rc = 0;
+	unsigned int n_iov = 2;
+	__u32 file_attributes = 0;
+	char *pc_buf = NULL;
+	int flags = 0;
+	unsigned int total_len;
+	__le16 *utf16_path = NULL;
+	struct TCP_Server_Info *server = cifs_pick_channel(ses);
+
+	cifs_dbg(FYI, "mkdir\n");
+
+	/* resource #1: path allocation */
+	utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
+	if (!utf16_path)
+		return -ENOMEM;
+
+	if (!ses || !server) {
+		rc = -EIO;
+		goto err_free_path;
+	}
+
+	/* resource #2: request */
+	rc = smb2_plain_req_init(SMB2_CREATE, tcon, server,
+				 (void **) &req, &total_len);
+	if (rc)
+		goto err_free_path;
+
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	req->ImpersonationLevel = IL_IMPERSONATION;
+	req->DesiredAccess = cpu_to_le32(FILE_WRITE_ATTRIBUTES);
+	/* File attributes ignored on open (used in create though) */
+	req->FileAttributes = cpu_to_le32(file_attributes);
+	req->ShareAccess = FILE_SHARE_ALL_LE;
+	req->CreateDisposition = cpu_to_le32(FILE_CREATE);
+	req->CreateOptions = cpu_to_le32(CREATE_NOT_FILE);
+
+	iov[0].iov_base = (char *)req;
+	/* -1 since last byte is buf[0] which is sent below (path) */
+	iov[0].iov_len = total_len - 1;
+
+	req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
+
+	/* [MS-SMB2] 2.2.13 NameOffset:
+	 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
+	 * the SMB2 header, the file name includes a prefix that will
+	 * be processed during DFS name normalization as specified in
+	 * section 3.3.5.9. Otherwise, the file name is relative to
+	 * the share that is identified by the TreeId in the SMB2
+	 * header.
+	 */
+	if (tcon->share_flags & SHI1005_FLAGS_DFS) {
+		int name_len;
+
+		req->hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
+		rc = alloc_path_with_tree_prefix(&copy_path, &copy_size,
+						 &name_len,
+						 tcon->tree_name, utf16_path);
+		if (rc)
+			goto err_free_req;
+
+		req->NameLength = cpu_to_le16(name_len * 2);
+		uni_path_len = copy_size;
+		/* free before overwriting resource */
+		kfree(utf16_path);
+		utf16_path = copy_path;
+	} else {
+		uni_path_len = (2 * UniStrnlen((wchar_t *)utf16_path, PATH_MAX)) + 2;
+		/* MUST set path len (NameLength) to 0 opening root of share */
+		req->NameLength = cpu_to_le16(uni_path_len - 2);
+		if (uni_path_len % 8 != 0) {
+			copy_size = roundup(uni_path_len, 8);
+			copy_path = kzalloc(copy_size, GFP_KERNEL);
+			if (!copy_path) {
+				rc = -ENOMEM;
+				goto err_free_req;
+			}
+			memcpy((char *)copy_path, (const char *)utf16_path,
+			       uni_path_len);
+			uni_path_len = copy_size;
+			/* free before overwriting resource */
+			kfree(utf16_path);
+			utf16_path = copy_path;
+		}
+	}
+
+	iov[1].iov_len = uni_path_len;
+	iov[1].iov_base = utf16_path;
+	req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE;
+
+	if (tcon->posix_extensions) {
+		/* resource #3: posix buf */
+		rc = add_posix_context(iov, &n_iov, mode);
+		if (rc)
+			goto err_free_req;
+		req->CreateContextsOffset = cpu_to_le32(
+			sizeof(struct smb2_create_req) +
+			iov[1].iov_len);
+		pc_buf = iov[n_iov-1].iov_base;
+	}
+
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	rqst.rq_iov = iov;
+	rqst.rq_nvec = n_iov;
+
+	/* no need to inc num_remote_opens because we close it just below */
+	trace_smb3_posix_mkdir_enter(xid, tcon->tid, ses->Suid, full_path, CREATE_NOT_FILE,
+				    FILE_WRITE_ATTRIBUTES);
+	/* resource #4: response buffer */
+	rc = cifs_send_recv(xid, ses, server,
+			    &rqst, &resp_buftype, flags, &rsp_iov);
+	if (rc) {
+		cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
+		trace_smb3_posix_mkdir_err(xid, tcon->tid, ses->Suid,
+					   CREATE_NOT_FILE,
+					   FILE_WRITE_ATTRIBUTES, rc);
+		goto err_free_rsp_buf;
+	}
+
+	/*
+	 * Although unlikely to be possible for rsp to be null and rc not set,
+	 * adding check below is slightly safer long term (and quiets Coverity
+	 * warning)
+	 */
+	rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
+	if (rsp == NULL) {
+		rc = -EIO;
+		kfree(pc_buf);
+		goto err_free_req;
+	}
+
+	trace_smb3_posix_mkdir_done(xid, rsp->PersistentFileId, tcon->tid, ses->Suid,
+				    CREATE_NOT_FILE, FILE_WRITE_ATTRIBUTES);
+
+	SMB2_close(xid, tcon, rsp->PersistentFileId, rsp->VolatileFileId);
+
+	/* Eventually save off posix specific response info and timestaps */
+
+err_free_rsp_buf:
+	free_rsp_buf(resp_buftype, rsp);
+	kfree(pc_buf);
+err_free_req:
+	cifs_small_buf_release(req);
+err_free_path:
+	kfree(utf16_path);
+	return rc;
+}
+
+int
+SMB2_open_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
+	       struct smb_rqst *rqst, __u8 *oplock,
+	       struct cifs_open_parms *oparms, __le16 *path)
+{
+	struct smb2_create_req *req;
+	unsigned int n_iov = 2;
+	__u32 file_attributes = 0;
+	int copy_size;
+	int uni_path_len;
+	unsigned int total_len;
+	struct kvec *iov = rqst->rq_iov;
+	__le16 *copy_path;
+	int rc;
+
+	rc = smb2_plain_req_init(SMB2_CREATE, tcon, server,
+				 (void **) &req, &total_len);
+	if (rc)
+		return rc;
+
+	iov[0].iov_base = (char *)req;
+	/* -1 since last byte is buf[0] which is sent below (path) */
+	iov[0].iov_len = total_len - 1;
+
+	if (oparms->create_options & CREATE_OPTION_READONLY)
+		file_attributes |= ATTR_READONLY;
+	if (oparms->create_options & CREATE_OPTION_SPECIAL)
+		file_attributes |= ATTR_SYSTEM;
+
+	req->ImpersonationLevel = IL_IMPERSONATION;
+	req->DesiredAccess = cpu_to_le32(oparms->desired_access);
+	/* File attributes ignored on open (used in create though) */
+	req->FileAttributes = cpu_to_le32(file_attributes);
+	req->ShareAccess = FILE_SHARE_ALL_LE;
+
+	req->CreateDisposition = cpu_to_le32(oparms->disposition);
+	req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
+	req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req));
+
+	/* [MS-SMB2] 2.2.13 NameOffset:
+	 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
+	 * the SMB2 header, the file name includes a prefix that will
+	 * be processed during DFS name normalization as specified in
+	 * section 3.3.5.9. Otherwise, the file name is relative to
+	 * the share that is identified by the TreeId in the SMB2
+	 * header.
+	 */
+	if (tcon->share_flags & SHI1005_FLAGS_DFS) {
+		int name_len;
+
+		req->hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
+		rc = alloc_path_with_tree_prefix(&copy_path, &copy_size,
+						 &name_len,
+						 tcon->tree_name, path);
+		if (rc)
+			return rc;
+		req->NameLength = cpu_to_le16(name_len * 2);
+		uni_path_len = copy_size;
+		path = copy_path;
+	} else {
+		uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
+		/* MUST set path len (NameLength) to 0 opening root of share */
+		req->NameLength = cpu_to_le16(uni_path_len - 2);
+		copy_size = round_up(uni_path_len, 8);
+		copy_path = kzalloc(copy_size, GFP_KERNEL);
+		if (!copy_path)
+			return -ENOMEM;
+		memcpy((char *)copy_path, (const char *)path,
+		       uni_path_len);
+		uni_path_len = copy_size;
+		path = copy_path;
+	}
+
+	iov[1].iov_len = uni_path_len;
+	iov[1].iov_base = path;
+
+	if ((!server->oplocks) || (tcon->no_lease))
+		*oplock = SMB2_OPLOCK_LEVEL_NONE;
+
+	if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
+	    *oplock == SMB2_OPLOCK_LEVEL_NONE)
+		req->RequestedOplockLevel = *oplock;
+	else if (!(server->capabilities & SMB2_GLOBAL_CAP_DIRECTORY_LEASING) &&
+		  (oparms->create_options & CREATE_NOT_FILE))
+		req->RequestedOplockLevel = *oplock; /* no srv lease support */
+	else {
+		rc = add_lease_context(server, req, iov, &n_iov,
+				       oparms->fid->lease_key, oplock);
+		if (rc)
+			return rc;
+	}
+
+	if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
+		rc = add_durable_context(iov, &n_iov, oparms,
+					tcon->use_persistent);
+		if (rc)
+			return rc;
+	}
+
+	if (tcon->posix_extensions) {
+		rc = add_posix_context(iov, &n_iov, oparms->mode);
+		if (rc)
+			return rc;
+	}
+
+	if (tcon->snapshot_time) {
+		cifs_dbg(FYI, "adding snapshot context\n");
+		rc = add_twarp_context(iov, &n_iov, tcon->snapshot_time);
+		if (rc)
+			return rc;
+	}
+
+	if ((oparms->disposition != FILE_OPEN) && (oparms->cifs_sb)) {
+		bool set_mode;
+		bool set_owner;
+
+		if ((oparms->cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) &&
+		    (oparms->mode != ACL_NO_MODE))
+			set_mode = true;
+		else {
+			set_mode = false;
+			oparms->mode = ACL_NO_MODE;
+		}
+
+		if (oparms->cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL)
+			set_owner = true;
+		else
+			set_owner = false;
+
+		if (set_owner | set_mode) {
+			cifs_dbg(FYI, "add sd with mode 0x%x\n", oparms->mode);
+			rc = add_sd_context(iov, &n_iov, oparms->mode, set_owner);
+			if (rc)
+				return rc;
+		}
+	}
+
+	add_query_id_context(iov, &n_iov);
+
+	if (n_iov > 2) {
+		/*
+		 * We have create contexts behind iov[1] (the file
+		 * name), point at them from the main create request
+		 */
+		req->CreateContextsOffset = cpu_to_le32(
+			sizeof(struct smb2_create_req) +
+			iov[1].iov_len);
+		req->CreateContextsLength = 0;
+
+		for (unsigned int i = 2; i < (n_iov-1); i++) {
+			struct kvec *v = &iov[i];
+			size_t len = v->iov_len;
+			struct create_context *cctx =
+				(struct create_context *)v->iov_base;
+
+			cctx->Next = cpu_to_le32(len);
+			le32_add_cpu(&req->CreateContextsLength, len);
+		}
+		le32_add_cpu(&req->CreateContextsLength,
+			     iov[n_iov-1].iov_len);
+	}
+
+	rqst->rq_nvec = n_iov;
+	return 0;
+}
+
+/* rq_iov[0] is the request and is released by cifs_small_buf_release().
+ * All other vectors are freed by kfree().
+ */
+void
+SMB2_open_free(struct smb_rqst *rqst)
+{
+	int i;
+
+	if (rqst && rqst->rq_iov) {
+		cifs_small_buf_release(rqst->rq_iov[0].iov_base);
+		for (i = 1; i < rqst->rq_nvec; i++)
+			if (rqst->rq_iov[i].iov_base != smb2_padding)
+				kfree(rqst->rq_iov[i].iov_base);
+	}
+}
+
+int
+SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
+	  __u8 *oplock, struct smb2_file_all_info *buf,
+	  struct create_posix_rsp *posix,
+	  struct kvec *err_iov, int *buftype)
+{
+	struct smb_rqst rqst;
+	struct smb2_create_rsp *rsp = NULL;
+	struct cifs_tcon *tcon = oparms->tcon;
+	struct cifs_ses *ses = tcon->ses;
+	struct TCP_Server_Info *server = cifs_pick_channel(ses);
+	struct kvec iov[SMB2_CREATE_IOV_SIZE];
+	struct kvec rsp_iov = {NULL, 0};
+	int resp_buftype = CIFS_NO_BUFFER;
+	int rc = 0;
+	int flags = 0;
+
+	cifs_dbg(FYI, "create/open\n");
+	if (!ses || !server)
+		return -EIO;
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	memset(&iov, 0, sizeof(iov));
+	rqst.rq_iov = iov;
+	rqst.rq_nvec = SMB2_CREATE_IOV_SIZE;
+
+	rc = SMB2_open_init(tcon, server,
+			    &rqst, oplock, oparms, path);
+	if (rc)
+		goto creat_exit;
+
+	trace_smb3_open_enter(xid, tcon->tid, tcon->ses->Suid, oparms->path,
+		oparms->create_options, oparms->desired_access);
+
+	rc = cifs_send_recv(xid, ses, server,
+			    &rqst, &resp_buftype, flags,
+			    &rsp_iov);
+	rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
+
+	if (rc != 0) {
+		cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
+		if (err_iov && rsp) {
+			*err_iov = rsp_iov;
+			*buftype = resp_buftype;
+			resp_buftype = CIFS_NO_BUFFER;
+			rsp = NULL;
+		}
+		trace_smb3_open_err(xid, tcon->tid, ses->Suid,
+				    oparms->create_options, oparms->desired_access, rc);
+		if (rc == -EREMCHG) {
+			pr_warn_once("server share %s deleted\n",
+				     tcon->tree_name);
+			tcon->need_reconnect = true;
+		}
+		goto creat_exit;
+	} else if (rsp == NULL) /* unlikely to happen, but safer to check */
+		goto creat_exit;
+	else
+		trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid, ses->Suid,
+				     oparms->create_options, oparms->desired_access);
+
+	atomic_inc(&tcon->num_remote_opens);
+	oparms->fid->persistent_fid = rsp->PersistentFileId;
+	oparms->fid->volatile_fid = rsp->VolatileFileId;
+	oparms->fid->access = oparms->desired_access;
+#ifdef CONFIG_CIFS_DEBUG2
+	oparms->fid->mid = le64_to_cpu(rsp->hdr.MessageId);
+#endif /* CIFS_DEBUG2 */
+
+	if (buf) {
+		buf->CreationTime = rsp->CreationTime;
+		buf->LastAccessTime = rsp->LastAccessTime;
+		buf->LastWriteTime = rsp->LastWriteTime;
+		buf->ChangeTime = rsp->ChangeTime;
+		buf->AllocationSize = rsp->AllocationSize;
+		buf->EndOfFile = rsp->EndofFile;
+		buf->Attributes = rsp->FileAttributes;
+		buf->NumberOfLinks = cpu_to_le32(1);
+		buf->DeletePending = 0;
+	}
+
+
+	rc = smb2_parse_contexts(server, &rsp_iov, &oparms->fid->epoch,
+				 oparms->fid->lease_key, oplock, buf, posix);
+creat_exit:
+	SMB2_open_free(&rqst);
+	free_rsp_buf(resp_buftype, rsp);
+	return rc;
+}
+
+int
+SMB2_ioctl_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
+		struct smb_rqst *rqst,
+		u64 persistent_fid, u64 volatile_fid, u32 opcode,
+		char *in_data, u32 indatalen,
+		__u32 max_response_size)
+{
+	struct smb2_ioctl_req *req;
+	struct kvec *iov = rqst->rq_iov;
+	unsigned int total_len;
+	int rc;
+	char *in_data_buf;
+
+	rc = smb2_ioctl_req_init(opcode, tcon, server,
+				 (void **) &req, &total_len);
+	if (rc)
+		return rc;
+
+	if (indatalen) {
+		/*
+		 * indatalen is usually small at a couple of bytes max, so
+		 * just allocate through generic pool
+		 */
+		in_data_buf = kmemdup(in_data, indatalen, GFP_NOFS);
+		if (!in_data_buf) {
+			cifs_small_buf_release(req);
+			return -ENOMEM;
+		}
+	}
+
+	req->CtlCode = cpu_to_le32(opcode);
+	req->PersistentFileId = persistent_fid;
+	req->VolatileFileId = volatile_fid;
+
+	iov[0].iov_base = (char *)req;
+	/*
+	 * If no input data, the size of ioctl struct in
+	 * protocol spec still includes a 1 byte data buffer,
+	 * but if input data passed to ioctl, we do not
+	 * want to double count this, so we do not send
+	 * the dummy one byte of data in iovec[0] if sending
+	 * input data (in iovec[1]).
+	 */
+	if (indatalen) {
+		req->InputCount = cpu_to_le32(indatalen);
+		/* do not set InputOffset if no input data */
+		req->InputOffset =
+		       cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer));
+		rqst->rq_nvec = 2;
+		iov[0].iov_len = total_len - 1;
+		iov[1].iov_base = in_data_buf;
+		iov[1].iov_len = indatalen;
+	} else {
+		rqst->rq_nvec = 1;
+		iov[0].iov_len = total_len;
+	}
+
+	req->OutputOffset = 0;
+	req->OutputCount = 0; /* MBZ */
+
+	/*
+	 * In most cases max_response_size is set to 16K (CIFSMaxBufSize)
+	 * We Could increase default MaxOutputResponse, but that could require
+	 * more credits. Windows typically sets this smaller, but for some
+	 * ioctls it may be useful to allow server to send more. No point
+	 * limiting what the server can send as long as fits in one credit
+	 * We can not handle more than CIFS_MAX_BUF_SIZE yet but may want
+	 * to increase this limit up in the future.
+	 * Note that for snapshot queries that servers like Azure expect that
+	 * the first query be minimal size (and just used to get the number/size
+	 * of previous versions) so response size must be specified as EXACTLY
+	 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
+	 * of eight bytes.  Currently that is the only case where we set max
+	 * response size smaller.
+	 */
+	req->MaxOutputResponse = cpu_to_le32(max_response_size);
+	req->hdr.CreditCharge =
+		cpu_to_le16(DIV_ROUND_UP(max(indatalen, max_response_size),
+					 SMB2_MAX_BUFFER_SIZE));
+	/* always an FSCTL (for now) */
+	req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
+
+	/* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
+	if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO)
+		req->hdr.Flags |= SMB2_FLAGS_SIGNED;
+
+	return 0;
+}
+
+void
+SMB2_ioctl_free(struct smb_rqst *rqst)
+{
+	int i;
+
+	if (rqst && rqst->rq_iov) {
+		cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
+		for (i = 1; i < rqst->rq_nvec; i++)
+			if (rqst->rq_iov[i].iov_base != smb2_padding)
+				kfree(rqst->rq_iov[i].iov_base);
+	}
+}
+
+
+/*
+ *	SMB2 IOCTL is used for both IOCTLs and FSCTLs
+ */
+int
+SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
+	   u64 volatile_fid, u32 opcode, char *in_data, u32 indatalen,
+	   u32 max_out_data_len, char **out_data,
+	   u32 *plen /* returned data len */)
+{
+	struct smb_rqst rqst;
+	struct smb2_ioctl_rsp *rsp = NULL;
+	struct cifs_ses *ses;
+	struct TCP_Server_Info *server;
+	struct kvec iov[SMB2_IOCTL_IOV_SIZE];
+	struct kvec rsp_iov = {NULL, 0};
+	int resp_buftype = CIFS_NO_BUFFER;
+	int rc = 0;
+	int flags = 0;
+
+	cifs_dbg(FYI, "SMB2 IOCTL\n");
+
+	if (out_data != NULL)
+		*out_data = NULL;
+
+	/* zero out returned data len, in case of error */
+	if (plen)
+		*plen = 0;
+
+	if (!tcon)
+		return -EIO;
+
+	ses = tcon->ses;
+	if (!ses)
+		return -EIO;
+
+	server = cifs_pick_channel(ses);
+	if (!server)
+		return -EIO;
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	memset(&iov, 0, sizeof(iov));
+	rqst.rq_iov = iov;
+	rqst.rq_nvec = SMB2_IOCTL_IOV_SIZE;
+
+	rc = SMB2_ioctl_init(tcon, server,
+			     &rqst, persistent_fid, volatile_fid, opcode,
+			     in_data, indatalen, max_out_data_len);
+	if (rc)
+		goto ioctl_exit;
+
+	rc = cifs_send_recv(xid, ses, server,
+			    &rqst, &resp_buftype, flags,
+			    &rsp_iov);
+	rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
+
+	if (rc != 0)
+		trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid,
+				ses->Suid, 0, opcode, rc);
+
+	if ((rc != 0) && (rc != -EINVAL) && (rc != -E2BIG)) {
+		cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
+		goto ioctl_exit;
+	} else if (rc == -EINVAL) {
+		if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
+		    (opcode != FSCTL_SRV_COPYCHUNK)) {
+			cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
+			goto ioctl_exit;
+		}
+	} else if (rc == -E2BIG) {
+		if (opcode != FSCTL_QUERY_ALLOCATED_RANGES) {
+			cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
+			goto ioctl_exit;
+		}
+	}
+
+	/* check if caller wants to look at return data or just return rc */
+	if ((plen == NULL) || (out_data == NULL))
+		goto ioctl_exit;
+
+	/*
+	 * Although unlikely to be possible for rsp to be null and rc not set,
+	 * adding check below is slightly safer long term (and quiets Coverity
+	 * warning)
+	 */
+	if (rsp == NULL) {
+		rc = -EIO;
+		goto ioctl_exit;
+	}
+
+	*plen = le32_to_cpu(rsp->OutputCount);
+
+	/* We check for obvious errors in the output buffer length and offset */
+	if (*plen == 0)
+		goto ioctl_exit; /* server returned no data */
+	else if (*plen > rsp_iov.iov_len || *plen > 0xFF00) {
+		cifs_tcon_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
+		*plen = 0;
+		rc = -EIO;
+		goto ioctl_exit;
+	}
+
+	if (rsp_iov.iov_len - *plen < le32_to_cpu(rsp->OutputOffset)) {
+		cifs_tcon_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
+			le32_to_cpu(rsp->OutputOffset));
+		*plen = 0;
+		rc = -EIO;
+		goto ioctl_exit;
+	}
+
+	*out_data = kmemdup((char *)rsp + le32_to_cpu(rsp->OutputOffset),
+			    *plen, GFP_KERNEL);
+	if (*out_data == NULL) {
+		rc = -ENOMEM;
+		goto ioctl_exit;
+	}
+
+ioctl_exit:
+	SMB2_ioctl_free(&rqst);
+	free_rsp_buf(resp_buftype, rsp);
+	return rc;
+}
+
+/*
+ *   Individual callers to ioctl worker function follow
+ */
+
+int
+SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
+		     u64 persistent_fid, u64 volatile_fid)
+{
+	int rc;
+	struct  compress_ioctl fsctl_input;
+	char *ret_data = NULL;
+
+	fsctl_input.CompressionState =
+			cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
+
+	rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
+			FSCTL_SET_COMPRESSION,
+			(char *)&fsctl_input /* data input */,
+			2 /* in data len */, CIFSMaxBufSize /* max out data */,
+			&ret_data /* out data */, NULL);
+
+	cifs_dbg(FYI, "set compression rc %d\n", rc);
+
+	return rc;
+}
+
+int
+SMB2_close_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
+		struct smb_rqst *rqst,
+		u64 persistent_fid, u64 volatile_fid, bool query_attrs)
+{
+	struct smb2_close_req *req;
+	struct kvec *iov = rqst->rq_iov;
+	unsigned int total_len;
+	int rc;
+
+	rc = smb2_plain_req_init(SMB2_CLOSE, tcon, server,
+				 (void **) &req, &total_len);
+	if (rc)
+		return rc;
+
+	req->PersistentFileId = persistent_fid;
+	req->VolatileFileId = volatile_fid;
+	if (query_attrs)
+		req->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
+	else
+		req->Flags = 0;
+	iov[0].iov_base = (char *)req;
+	iov[0].iov_len = total_len;
+
+	return 0;
+}
+
+void
+SMB2_close_free(struct smb_rqst *rqst)
+{
+	if (rqst && rqst->rq_iov)
+		cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
+}
+
+int
+__SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
+	     u64 persistent_fid, u64 volatile_fid,
+	     struct smb2_file_network_open_info *pbuf)
+{
+	struct smb_rqst rqst;
+	struct smb2_close_rsp *rsp = NULL;
+	struct cifs_ses *ses = tcon->ses;
+	struct TCP_Server_Info *server = cifs_pick_channel(ses);
+	struct kvec iov[1];
+	struct kvec rsp_iov;
+	int resp_buftype = CIFS_NO_BUFFER;
+	int rc = 0;
+	int flags = 0;
+	bool query_attrs = false;
+
+	cifs_dbg(FYI, "Close\n");
+
+	if (!ses || !server)
+		return -EIO;
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	memset(&iov, 0, sizeof(iov));
+	rqst.rq_iov = iov;
+	rqst.rq_nvec = 1;
+
+	/* check if need to ask server to return timestamps in close response */
+	if (pbuf)
+		query_attrs = true;
+
+	trace_smb3_close_enter(xid, persistent_fid, tcon->tid, ses->Suid);
+	rc = SMB2_close_init(tcon, server,
+			     &rqst, persistent_fid, volatile_fid,
+			     query_attrs);
+	if (rc)
+		goto close_exit;
+
+	rc = cifs_send_recv(xid, ses, server,
+			    &rqst, &resp_buftype, flags, &rsp_iov);
+	rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
+
+	if (rc != 0) {
+		cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
+		trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid,
+				     rc);
+		goto close_exit;
+	} else {
+		trace_smb3_close_done(xid, persistent_fid, tcon->tid,
+				      ses->Suid);
+		if (pbuf)
+			memcpy(&pbuf->network_open_info,
+			       &rsp->network_open_info,
+			       sizeof(pbuf->network_open_info));
+	}
+
+	atomic_dec(&tcon->num_remote_opens);
+close_exit:
+	SMB2_close_free(&rqst);
+	free_rsp_buf(resp_buftype, rsp);
+
+	/* retry close in a worker thread if this one is interrupted */
+	if (is_interrupt_error(rc)) {
+		int tmp_rc;
+
+		tmp_rc = smb2_handle_cancelled_close(tcon, persistent_fid,
+						     volatile_fid);
+		if (tmp_rc)
+			cifs_dbg(VFS, "handle cancelled close fid 0x%llx returned error %d\n",
+				 persistent_fid, tmp_rc);
+	}
+	return rc;
+}
+
+int
+SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
+		u64 persistent_fid, u64 volatile_fid)
+{
+	return __SMB2_close(xid, tcon, persistent_fid, volatile_fid, NULL);
+}
+
+int
+smb2_validate_iov(unsigned int offset, unsigned int buffer_length,
+		  struct kvec *iov, unsigned int min_buf_size)
+{
+	unsigned int smb_len = iov->iov_len;
+	char *end_of_smb = smb_len + (char *)iov->iov_base;
+	char *begin_of_buf = offset + (char *)iov->iov_base;
+	char *end_of_buf = begin_of_buf + buffer_length;
+
+
+	if (buffer_length < min_buf_size) {
+		cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
+			 buffer_length, min_buf_size);
+		return -EINVAL;
+	}
+
+	/* check if beyond RFC1001 maximum length */
+	if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
+		cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
+			 buffer_length, smb_len);
+		return -EINVAL;
+	}
+
+	if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
+		cifs_dbg(VFS, "Invalid server response, bad offset to data\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/*
+ * If SMB buffer fields are valid, copy into temporary buffer to hold result.
+ * Caller must free buffer.
+ */
+int
+smb2_validate_and_copy_iov(unsigned int offset, unsigned int buffer_length,
+			   struct kvec *iov, unsigned int minbufsize,
+			   char *data)
+{
+	char *begin_of_buf = offset + (char *)iov->iov_base;
+	int rc;
+
+	if (!data)
+		return -EINVAL;
+
+	rc = smb2_validate_iov(offset, buffer_length, iov, minbufsize);
+	if (rc)
+		return rc;
+
+	memcpy(data, begin_of_buf, minbufsize);
+
+	return 0;
+}
+
+int
+SMB2_query_info_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
+		     struct smb_rqst *rqst,
+		     u64 persistent_fid, u64 volatile_fid,
+		     u8 info_class, u8 info_type, u32 additional_info,
+		     size_t output_len, size_t input_len, void *input)
+{
+	struct smb2_query_info_req *req;
+	struct kvec *iov = rqst->rq_iov;
+	unsigned int total_len;
+	size_t len;
+	int rc;
+
+	if (unlikely(check_add_overflow(input_len, sizeof(*req), &len) ||
+		     len > CIFSMaxBufSize))
+		return -EINVAL;
+
+	rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, server,
+				 (void **) &req, &total_len);
+	if (rc)
+		return rc;
+
+	req->InfoType = info_type;
+	req->FileInfoClass = info_class;
+	req->PersistentFileId = persistent_fid;
+	req->VolatileFileId = volatile_fid;
+	req->AdditionalInformation = cpu_to_le32(additional_info);
+
+	req->OutputBufferLength = cpu_to_le32(output_len);
+	if (input_len) {
+		req->InputBufferLength = cpu_to_le32(input_len);
+		/* total_len for smb query request never close to le16 max */
+		req->InputBufferOffset = cpu_to_le16(total_len - 1);
+		memcpy(req->Buffer, input, input_len);
+	}
+
+	iov[0].iov_base = (char *)req;
+	/* 1 for Buffer */
+	iov[0].iov_len = len;
+	return 0;
+}
+
+void
+SMB2_query_info_free(struct smb_rqst *rqst)
+{
+	if (rqst && rqst->rq_iov)
+		cifs_buf_release(rqst->rq_iov[0].iov_base); /* request */
+}
+
+static int
+query_info(const unsigned int xid, struct cifs_tcon *tcon,
+	   u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type,
+	   u32 additional_info, size_t output_len, size_t min_len, void **data,
+		u32 *dlen)
+{
+	struct smb_rqst rqst;
+	struct smb2_query_info_rsp *rsp = NULL;
+	struct kvec iov[1];
+	struct kvec rsp_iov;
+	int rc = 0;
+	int resp_buftype = CIFS_NO_BUFFER;
+	struct cifs_ses *ses = tcon->ses;
+	struct TCP_Server_Info *server;
+	int flags = 0;
+	bool allocated = false;
+
+	cifs_dbg(FYI, "Query Info\n");
+
+	if (!ses)
+		return -EIO;
+	server = cifs_pick_channel(ses);
+	if (!server)
+		return -EIO;
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	memset(&iov, 0, sizeof(iov));
+	rqst.rq_iov = iov;
+	rqst.rq_nvec = 1;
+
+	rc = SMB2_query_info_init(tcon, server,
+				  &rqst, persistent_fid, volatile_fid,
+				  info_class, info_type, additional_info,
+				  output_len, 0, NULL);
+	if (rc)
+		goto qinf_exit;
+
+	trace_smb3_query_info_enter(xid, persistent_fid, tcon->tid,
+				    ses->Suid, info_class, (__u32)info_type);
+
+	rc = cifs_send_recv(xid, ses, server,
+			    &rqst, &resp_buftype, flags, &rsp_iov);
+	rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
+
+	if (rc) {
+		cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
+		trace_smb3_query_info_err(xid, persistent_fid, tcon->tid,
+				ses->Suid, info_class, (__u32)info_type, rc);
+		goto qinf_exit;
+	}
+
+	trace_smb3_query_info_done(xid, persistent_fid, tcon->tid,
+				ses->Suid, info_class, (__u32)info_type);
+
+	if (dlen) {
+		*dlen = le32_to_cpu(rsp->OutputBufferLength);
+		if (!*data) {
+			*data = kmalloc(*dlen, GFP_KERNEL);
+			if (!*data) {
+				cifs_tcon_dbg(VFS,
+					"Error %d allocating memory for acl\n",
+					rc);
+				*dlen = 0;
+				rc = -ENOMEM;
+				goto qinf_exit;
+			}
+			allocated = true;
+		}
+	}
+
+	rc = smb2_validate_and_copy_iov(le16_to_cpu(rsp->OutputBufferOffset),
+					le32_to_cpu(rsp->OutputBufferLength),
+					&rsp_iov, dlen ? *dlen : min_len, *data);
+	if (rc && allocated) {
+		kfree(*data);
+		*data = NULL;
+		*dlen = 0;
+	}
+
+qinf_exit:
+	SMB2_query_info_free(&rqst);
+	free_rsp_buf(resp_buftype, rsp);
+	return rc;
+}
+
+int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
+	u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data)
+{
+	return query_info(xid, tcon, persistent_fid, volatile_fid,
+			  FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0,
+			  sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
+			  sizeof(struct smb2_file_all_info), (void **)&data,
+			  NULL);
+}
+
+#if 0
+/* currently unused, as now we are doing compounding instead (see smb311_posix_query_path_info) */
+int
+SMB311_posix_query_info(const unsigned int xid, struct cifs_tcon *tcon,
+		u64 persistent_fid, u64 volatile_fid, struct smb311_posix_qinfo *data, u32 *plen)
+{
+	size_t output_len = sizeof(struct smb311_posix_qinfo *) +
+			(sizeof(struct cifs_sid) * 2) + (PATH_MAX * 2);
+	*plen = 0;
+
+	return query_info(xid, tcon, persistent_fid, volatile_fid,
+			  SMB_FIND_FILE_POSIX_INFO, SMB2_O_INFO_FILE, 0,
+			  output_len, sizeof(struct smb311_posix_qinfo), (void **)&data, plen);
+	/* Note caller must free "data" (passed in above). It may be allocated in query_info call */
+}
+#endif
+
+int
+SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon,
+	       u64 persistent_fid, u64 volatile_fid,
+	       void **data, u32 *plen, u32 extra_info)
+{
+	__u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
+				extra_info;
+	*plen = 0;
+
+	return query_info(xid, tcon, persistent_fid, volatile_fid,
+			  0, SMB2_O_INFO_SECURITY, additional_info,
+			  SMB2_MAX_BUFFER_SIZE, MIN_SEC_DESC_LEN, data, plen);
+}
+
+int
+SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
+		 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
+{
+	return query_info(xid, tcon, persistent_fid, volatile_fid,
+			  FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0,
+			  sizeof(struct smb2_file_internal_info),
+			  sizeof(struct smb2_file_internal_info),
+			  (void **)&uniqueid, NULL);
+}
+
+/*
+ * CHANGE_NOTIFY Request is sent to get notifications on changes to a directory
+ * See MS-SMB2 2.2.35 and 2.2.36
+ */
+
+static int
+SMB2_notify_init(const unsigned int xid, struct smb_rqst *rqst,
+		 struct cifs_tcon *tcon, struct TCP_Server_Info *server,
+		 u64 persistent_fid, u64 volatile_fid,
+		 u32 completion_filter, bool watch_tree)
+{
+	struct smb2_change_notify_req *req;
+	struct kvec *iov = rqst->rq_iov;
+	unsigned int total_len;
+	int rc;
+
+	rc = smb2_plain_req_init(SMB2_CHANGE_NOTIFY, tcon, server,
+				 (void **) &req, &total_len);
+	if (rc)
+		return rc;
+
+	req->PersistentFileId = persistent_fid;
+	req->VolatileFileId = volatile_fid;
+	/* See note 354 of MS-SMB2, 64K max */
+	req->OutputBufferLength =
+		cpu_to_le32(SMB2_MAX_BUFFER_SIZE - MAX_SMB2_HDR_SIZE);
+	req->CompletionFilter = cpu_to_le32(completion_filter);
+	if (watch_tree)
+		req->Flags = cpu_to_le16(SMB2_WATCH_TREE);
+	else
+		req->Flags = 0;
+
+	iov[0].iov_base = (char *)req;
+	iov[0].iov_len = total_len;
+
+	return 0;
+}
+
+int
+SMB2_change_notify(const unsigned int xid, struct cifs_tcon *tcon,
+		u64 persistent_fid, u64 volatile_fid, bool watch_tree,
+		u32 completion_filter, u32 max_out_data_len, char **out_data,
+		u32 *plen /* returned data len */)
+{
+	struct cifs_ses *ses = tcon->ses;
+	struct TCP_Server_Info *server = cifs_pick_channel(ses);
+	struct smb_rqst rqst;
+	struct smb2_change_notify_rsp *smb_rsp;
+	struct kvec iov[1];
+	struct kvec rsp_iov = {NULL, 0};
+	int resp_buftype = CIFS_NO_BUFFER;
+	int flags = 0;
+	int rc = 0;
+
+	cifs_dbg(FYI, "change notify\n");
+	if (!ses || !server)
+		return -EIO;
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	memset(&iov, 0, sizeof(iov));
+	if (plen)
+		*plen = 0;
+
+	rqst.rq_iov = iov;
+	rqst.rq_nvec = 1;
+
+	rc = SMB2_notify_init(xid, &rqst, tcon, server,
+			      persistent_fid, volatile_fid,
+			      completion_filter, watch_tree);
+	if (rc)
+		goto cnotify_exit;
+
+	trace_smb3_notify_enter(xid, persistent_fid, tcon->tid, ses->Suid,
+				(u8)watch_tree, completion_filter);
+	rc = cifs_send_recv(xid, ses, server,
+			    &rqst, &resp_buftype, flags, &rsp_iov);
+
+	if (rc != 0) {
+		cifs_stats_fail_inc(tcon, SMB2_CHANGE_NOTIFY_HE);
+		trace_smb3_notify_err(xid, persistent_fid, tcon->tid, ses->Suid,
+				(u8)watch_tree, completion_filter, rc);
+	} else {
+		trace_smb3_notify_done(xid, persistent_fid, tcon->tid,
+			ses->Suid, (u8)watch_tree, completion_filter);
+		/* validate that notify information is plausible */
+		if ((rsp_iov.iov_base == NULL) ||
+		    (rsp_iov.iov_len < sizeof(struct smb2_change_notify_rsp) + 1))
+			goto cnotify_exit;
+
+		smb_rsp = (struct smb2_change_notify_rsp *)rsp_iov.iov_base;
+
+		smb2_validate_iov(le16_to_cpu(smb_rsp->OutputBufferOffset),
+				le32_to_cpu(smb_rsp->OutputBufferLength), &rsp_iov,
+				sizeof(struct file_notify_information));
+
+		*out_data = kmemdup((char *)smb_rsp + le16_to_cpu(smb_rsp->OutputBufferOffset),
+				le32_to_cpu(smb_rsp->OutputBufferLength), GFP_KERNEL);
+		if (*out_data == NULL) {
+			rc = -ENOMEM;
+			goto cnotify_exit;
+		} else if (plen)
+			*plen = le32_to_cpu(smb_rsp->OutputBufferLength);
+	}
+
+ cnotify_exit:
+	if (rqst.rq_iov)
+		cifs_small_buf_release(rqst.rq_iov[0].iov_base); /* request */
+	free_rsp_buf(resp_buftype, rsp_iov.iov_base);
+	return rc;
+}
+
+
+
+/*
+ * This is a no-op for now. We're not really interested in the reply, but
+ * rather in the fact that the server sent one and that server->lstrp
+ * gets updated.
+ *
+ * FIXME: maybe we should consider checking that the reply matches request?
+ */
+static void
+smb2_echo_callback(struct mid_q_entry *mid)
+{
+	struct TCP_Server_Info *server = mid->callback_data;
+	struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
+	struct cifs_credits credits = { .value = 0, .instance = 0 };
+
+	if (mid->mid_state == MID_RESPONSE_RECEIVED
+	    || mid->mid_state == MID_RESPONSE_MALFORMED) {
+		credits.value = le16_to_cpu(rsp->hdr.CreditRequest);
+		credits.instance = server->reconnect_instance;
+	}
+
+	release_mid(mid);
+	add_credits(server, &credits, CIFS_ECHO_OP);
+}
+
+void smb2_reconnect_server(struct work_struct *work)
+{
+	struct TCP_Server_Info *server = container_of(work,
+					struct TCP_Server_Info, reconnect.work);
+	struct TCP_Server_Info *pserver;
+	struct cifs_ses *ses, *ses2;
+	struct cifs_tcon *tcon, *tcon2;
+	struct list_head tmp_list, tmp_ses_list;
+	bool tcon_exist = false, ses_exist = false;
+	bool tcon_selected = false;
+	int rc;
+	bool resched = false;
+
+	/* first check if ref count has reached 0, if not inc ref count */
+	spin_lock(&cifs_tcp_ses_lock);
+	if (!server->srv_count) {
+		spin_unlock(&cifs_tcp_ses_lock);
+		return;
+	}
+	server->srv_count++;
+	spin_unlock(&cifs_tcp_ses_lock);
+
+	/* If server is a channel, select the primary channel */
+	pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
+
+	/* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
+	mutex_lock(&pserver->reconnect_mutex);
+
+	/* if the server is marked for termination, drop the ref count here */
+	if (server->terminate) {
+		cifs_put_tcp_session(server, true);
+		mutex_unlock(&pserver->reconnect_mutex);
+		return;
+	}
+
+	INIT_LIST_HEAD(&tmp_list);
+	INIT_LIST_HEAD(&tmp_ses_list);
+	cifs_dbg(FYI, "Reconnecting tcons and channels\n");
+
+	spin_lock(&cifs_tcp_ses_lock);
+	list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
+		spin_lock(&ses->ses_lock);
+		if (ses->ses_status == SES_EXITING) {
+			spin_unlock(&ses->ses_lock);
+			continue;
+		}
+		spin_unlock(&ses->ses_lock);
+
+		tcon_selected = false;
+
+		list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
+			if (tcon->need_reconnect || tcon->need_reopen_files) {
+				tcon->tc_count++;
+				list_add_tail(&tcon->rlist, &tmp_list);
+				tcon_selected = tcon_exist = true;
+			}
+		}
+		/*
+		 * IPC has the same lifetime as its session and uses its
+		 * refcount.
+		 */
+		if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) {
+			list_add_tail(&ses->tcon_ipc->rlist, &tmp_list);
+			tcon_selected = tcon_exist = true;
+			cifs_smb_ses_inc_refcount(ses);
+		}
+		/*
+		 * handle the case where channel needs to reconnect
+		 * binding session, but tcon is healthy (some other channel
+		 * is active)
+		 */
+		spin_lock(&ses->chan_lock);
+		if (!tcon_selected && cifs_chan_needs_reconnect(ses, server)) {
+			list_add_tail(&ses->rlist, &tmp_ses_list);
+			ses_exist = true;
+			cifs_smb_ses_inc_refcount(ses);
+		}
+		spin_unlock(&ses->chan_lock);
+	}
+	spin_unlock(&cifs_tcp_ses_lock);
+
+	list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
+		rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon, server, true);
+		if (!rc)
+			cifs_reopen_persistent_handles(tcon);
+		else
+			resched = true;
+		list_del_init(&tcon->rlist);
+		if (tcon->ipc)
+			cifs_put_smb_ses(tcon->ses);
+		else
+			cifs_put_tcon(tcon);
+	}
+
+	if (!ses_exist)
+		goto done;
+
+	/* allocate a dummy tcon struct used for reconnect */
+	tcon = tcon_info_alloc(false);
+	if (!tcon) {
+		resched = true;
+		list_for_each_entry_safe(ses, ses2, &tmp_ses_list, rlist) {
+			list_del_init(&ses->rlist);
+			cifs_put_smb_ses(ses);
+		}
+		goto done;
+	}
+
+	tcon->status = TID_GOOD;
+	tcon->retry = false;
+	tcon->need_reconnect = false;
+
+	/* now reconnect sessions for necessary channels */
+	list_for_each_entry_safe(ses, ses2, &tmp_ses_list, rlist) {
+		tcon->ses = ses;
+		rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon, server, true);
+		if (rc)
+			resched = true;
+		list_del_init(&ses->rlist);
+		cifs_put_smb_ses(ses);
+	}
+	tconInfoFree(tcon);
+
+done:
+	cifs_dbg(FYI, "Reconnecting tcons and channels finished\n");
+	if (resched)
+		queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ);
+	mutex_unlock(&pserver->reconnect_mutex);
+
+	/* now we can safely release srv struct */
+	cifs_put_tcp_session(server, true);
+}
+
+int
+SMB2_echo(struct TCP_Server_Info *server)
+{
+	struct smb2_echo_req *req;
+	int rc = 0;
+	struct kvec iov[1];
+	struct smb_rqst rqst = { .rq_iov = iov,
+				 .rq_nvec = 1 };
+	unsigned int total_len;
+
+	cifs_dbg(FYI, "In echo request for conn_id %lld\n", server->conn_id);
+
+	spin_lock(&server->srv_lock);
+	if (server->ops->need_neg &&
+	    server->ops->need_neg(server)) {
+		spin_unlock(&server->srv_lock);
+		/* No need to send echo on newly established connections */
+		mod_delayed_work(cifsiod_wq, &server->reconnect, 0);
+		return rc;
+	}
+	spin_unlock(&server->srv_lock);
+
+	rc = smb2_plain_req_init(SMB2_ECHO, NULL, server,
+				 (void **)&req, &total_len);
+	if (rc)
+		return rc;
+
+	req->hdr.CreditRequest = cpu_to_le16(1);
+
+	iov[0].iov_len = total_len;
+	iov[0].iov_base = (char *)req;
+
+	rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
+			     server, CIFS_ECHO_OP, NULL);
+	if (rc)
+		cifs_dbg(FYI, "Echo request failed: %d\n", rc);
+
+	cifs_small_buf_release(req);
+	return rc;
+}
+
+void
+SMB2_flush_free(struct smb_rqst *rqst)
+{
+	if (rqst && rqst->rq_iov)
+		cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
+}
+
+int
+SMB2_flush_init(const unsigned int xid, struct smb_rqst *rqst,
+		struct cifs_tcon *tcon, struct TCP_Server_Info *server,
+		u64 persistent_fid, u64 volatile_fid)
+{
+	struct smb2_flush_req *req;
+	struct kvec *iov = rqst->rq_iov;
+	unsigned int total_len;
+	int rc;
+
+	rc = smb2_plain_req_init(SMB2_FLUSH, tcon, server,
+				 (void **) &req, &total_len);
+	if (rc)
+		return rc;
+
+	req->PersistentFileId = persistent_fid;
+	req->VolatileFileId = volatile_fid;
+
+	iov[0].iov_base = (char *)req;
+	iov[0].iov_len = total_len;
+
+	return 0;
+}
+
+int
+SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
+	   u64 volatile_fid)
+{
+	struct cifs_ses *ses = tcon->ses;
+	struct smb_rqst rqst;
+	struct kvec iov[1];
+	struct kvec rsp_iov = {NULL, 0};
+	struct TCP_Server_Info *server = cifs_pick_channel(ses);
+	int resp_buftype = CIFS_NO_BUFFER;
+	int flags = 0;
+	int rc = 0;
+
+	cifs_dbg(FYI, "flush\n");
+	if (!ses || !(ses->server))
+		return -EIO;
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	memset(&iov, 0, sizeof(iov));
+	rqst.rq_iov = iov;
+	rqst.rq_nvec = 1;
+
+	rc = SMB2_flush_init(xid, &rqst, tcon, server,
+			     persistent_fid, volatile_fid);
+	if (rc)
+		goto flush_exit;
+
+	trace_smb3_flush_enter(xid, persistent_fid, tcon->tid, ses->Suid);
+	rc = cifs_send_recv(xid, ses, server,
+			    &rqst, &resp_buftype, flags, &rsp_iov);
+
+	if (rc != 0) {
+		cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
+		trace_smb3_flush_err(xid, persistent_fid, tcon->tid, ses->Suid,
+				     rc);
+	} else
+		trace_smb3_flush_done(xid, persistent_fid, tcon->tid,
+				      ses->Suid);
+
+ flush_exit:
+	SMB2_flush_free(&rqst);
+	free_rsp_buf(resp_buftype, rsp_iov.iov_base);
+	return rc;
+}
+
+#ifdef CONFIG_CIFS_SMB_DIRECT
+static inline bool smb3_use_rdma_offload(struct cifs_io_parms *io_parms)
+{
+	struct TCP_Server_Info *server = io_parms->server;
+	struct cifs_tcon *tcon = io_parms->tcon;
+
+	/* we can only offload if we're connected */
+	if (!server || !tcon)
+		return false;
+
+	/* we can only offload on an rdma connection */
+	if (!server->rdma || !server->smbd_conn)
+		return false;
+
+	/* we don't support signed offload yet */
+	if (server->sign)
+		return false;
+
+	/* we don't support encrypted offload yet */
+	if (smb3_encryption_required(tcon))
+		return false;
+
+	/* offload also has its overhead, so only do it if desired */
+	if (io_parms->length < server->smbd_conn->rdma_readwrite_threshold)
+		return false;
+
+	return true;
+}
+#endif /* CONFIG_CIFS_SMB_DIRECT */
+
+/*
+ * To form a chain of read requests, any read requests after the first should
+ * have the end_of_chain boolean set to true.
+ */
+static int
+smb2_new_read_req(void **buf, unsigned int *total_len,
+	struct cifs_io_parms *io_parms, struct cifs_readdata *rdata,
+	unsigned int remaining_bytes, int request_type)
+{
+	int rc = -EACCES;
+	struct smb2_read_req *req = NULL;
+	struct smb2_hdr *shdr;
+	struct TCP_Server_Info *server = io_parms->server;
+
+	rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, server,
+				 (void **) &req, total_len);
+	if (rc)
+		return rc;
+
+	if (server == NULL)
+		return -ECONNABORTED;
+
+	shdr = &req->hdr;
+	shdr->Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid);
+
+	req->PersistentFileId = io_parms->persistent_fid;
+	req->VolatileFileId = io_parms->volatile_fid;
+	req->ReadChannelInfoOffset = 0; /* reserved */
+	req->ReadChannelInfoLength = 0; /* reserved */
+	req->Channel = 0; /* reserved */
+	req->MinimumCount = 0;
+	req->Length = cpu_to_le32(io_parms->length);
+	req->Offset = cpu_to_le64(io_parms->offset);
+
+	trace_smb3_read_enter(0 /* xid */,
+			io_parms->persistent_fid,
+			io_parms->tcon->tid, io_parms->tcon->ses->Suid,
+			io_parms->offset, io_parms->length);
+#ifdef CONFIG_CIFS_SMB_DIRECT
+	/*
+	 * If we want to do a RDMA write, fill in and append
+	 * smbd_buffer_descriptor_v1 to the end of read request
+	 */
+	if (smb3_use_rdma_offload(io_parms)) {
+		struct smbd_buffer_descriptor_v1 *v1;
+		bool need_invalidate = server->dialect == SMB30_PROT_ID;
+
+		rdata->mr = smbd_register_mr(server->smbd_conn, &rdata->iter,
+					     true, need_invalidate);
+		if (!rdata->mr)
+			return -EAGAIN;
+
+		req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
+		if (need_invalidate)
+			req->Channel = SMB2_CHANNEL_RDMA_V1;
+		req->ReadChannelInfoOffset =
+			cpu_to_le16(offsetof(struct smb2_read_req, Buffer));
+		req->ReadChannelInfoLength =
+			cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
+		v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
+		v1->offset = cpu_to_le64(rdata->mr->mr->iova);
+		v1->token = cpu_to_le32(rdata->mr->mr->rkey);
+		v1->length = cpu_to_le32(rdata->mr->mr->length);
+
+		*total_len += sizeof(*v1) - 1;
+	}
+#endif
+	if (request_type & CHAINED_REQUEST) {
+		if (!(request_type & END_OF_CHAIN)) {
+			/* next 8-byte aligned request */
+			*total_len = ALIGN(*total_len, 8);
+			shdr->NextCommand = cpu_to_le32(*total_len);
+		} else /* END_OF_CHAIN */
+			shdr->NextCommand = 0;
+		if (request_type & RELATED_REQUEST) {
+			shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
+			/*
+			 * Related requests use info from previous read request
+			 * in chain.
+			 */
+			shdr->SessionId = cpu_to_le64(0xFFFFFFFFFFFFFFFF);
+			shdr->Id.SyncId.TreeId = cpu_to_le32(0xFFFFFFFF);
+			req->PersistentFileId = (u64)-1;
+			req->VolatileFileId = (u64)-1;
+		}
+	}
+	if (remaining_bytes > io_parms->length)
+		req->RemainingBytes = cpu_to_le32(remaining_bytes);
+	else
+		req->RemainingBytes = 0;
+
+	*buf = req;
+	return rc;
+}
+
+static void
+smb2_readv_callback(struct mid_q_entry *mid)
+{
+	struct cifs_readdata *rdata = mid->callback_data;
+	struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
+	struct TCP_Server_Info *server = rdata->server;
+	struct smb2_hdr *shdr =
+				(struct smb2_hdr *)rdata->iov[0].iov_base;
+	struct cifs_credits credits = { .value = 0, .instance = 0 };
+	struct smb_rqst rqst = { .rq_iov = &rdata->iov[1], .rq_nvec = 1 };
+
+	if (rdata->got_bytes) {
+		rqst.rq_iter	  = rdata->iter;
+		rqst.rq_iter_size = iov_iter_count(&rdata->iter);
+	}
+
+	WARN_ONCE(rdata->server != mid->server,
+		  "rdata server %p != mid server %p",
+		  rdata->server, mid->server);
+
+	cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
+		 __func__, mid->mid, mid->mid_state, rdata->result,
+		 rdata->bytes);
+
+	switch (mid->mid_state) {
+	case MID_RESPONSE_RECEIVED:
+		credits.value = le16_to_cpu(shdr->CreditRequest);
+		credits.instance = server->reconnect_instance;
+		/* result already set, check signature */
+		if (server->sign && !mid->decrypted) {
+			int rc;
+
+			iov_iter_revert(&rqst.rq_iter, rdata->got_bytes);
+			iov_iter_truncate(&rqst.rq_iter, rdata->got_bytes);
+			rc = smb2_verify_signature(&rqst, server);
+			if (rc)
+				cifs_tcon_dbg(VFS, "SMB signature verification returned error = %d\n",
+					 rc);
+		}
+		/* FIXME: should this be counted toward the initiating task? */
+		task_io_account_read(rdata->got_bytes);
+		cifs_stats_bytes_read(tcon, rdata->got_bytes);
+		break;
+	case MID_REQUEST_SUBMITTED:
+	case MID_RETRY_NEEDED:
+		rdata->result = -EAGAIN;
+		if (server->sign && rdata->got_bytes)
+			/* reset bytes number since we can not check a sign */
+			rdata->got_bytes = 0;
+		/* FIXME: should this be counted toward the initiating task? */
+		task_io_account_read(rdata->got_bytes);
+		cifs_stats_bytes_read(tcon, rdata->got_bytes);
+		break;
+	case MID_RESPONSE_MALFORMED:
+		credits.value = le16_to_cpu(shdr->CreditRequest);
+		credits.instance = server->reconnect_instance;
+		fallthrough;
+	default:
+		rdata->result = -EIO;
+	}
+#ifdef CONFIG_CIFS_SMB_DIRECT
+	/*
+	 * If this rdata has a memmory registered, the MR can be freed
+	 * MR needs to be freed as soon as I/O finishes to prevent deadlock
+	 * because they have limited number and are used for future I/Os
+	 */
+	if (rdata->mr) {
+		smbd_deregister_mr(rdata->mr);
+		rdata->mr = NULL;
+	}
+#endif
+	if (rdata->result && rdata->result != -ENODATA) {
+		cifs_stats_fail_inc(tcon, SMB2_READ_HE);
+		trace_smb3_read_err(0 /* xid */,
+				    rdata->cfile->fid.persistent_fid,
+				    tcon->tid, tcon->ses->Suid, rdata->offset,
+				    rdata->bytes, rdata->result);
+	} else
+		trace_smb3_read_done(0 /* xid */,
+				     rdata->cfile->fid.persistent_fid,
+				     tcon->tid, tcon->ses->Suid,
+				     rdata->offset, rdata->got_bytes);
+
+	queue_work(cifsiod_wq, &rdata->work);
+	release_mid(mid);
+	add_credits(server, &credits, 0);
+}
+
+/* smb2_async_readv - send an async read, and set up mid to handle result */
+int
+smb2_async_readv(struct cifs_readdata *rdata)
+{
+	int rc, flags = 0;
+	char *buf;
+	struct smb2_hdr *shdr;
+	struct cifs_io_parms io_parms;
+	struct smb_rqst rqst = { .rq_iov = rdata->iov,
+				 .rq_nvec = 1 };
+	struct TCP_Server_Info *server;
+	struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
+	unsigned int total_len;
+	int credit_request;
+
+	cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
+		 __func__, rdata->offset, rdata->bytes);
+
+	if (!rdata->server)
+		rdata->server = cifs_pick_channel(tcon->ses);
+
+	io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
+	io_parms.server = server = rdata->server;
+	io_parms.offset = rdata->offset;
+	io_parms.length = rdata->bytes;
+	io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
+	io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
+	io_parms.pid = rdata->pid;
+
+	rc = smb2_new_read_req(
+		(void **) &buf, &total_len, &io_parms, rdata, 0, 0);
+	if (rc)
+		return rc;
+
+	if (smb3_encryption_required(io_parms.tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	rdata->iov[0].iov_base = buf;
+	rdata->iov[0].iov_len = total_len;
+
+	shdr = (struct smb2_hdr *)buf;
+
+	if (rdata->credits.value > 0) {
+		shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
+						SMB2_MAX_BUFFER_SIZE));
+		credit_request = le16_to_cpu(shdr->CreditCharge) + 8;
+		if (server->credits >= server->max_credits)
+			shdr->CreditRequest = cpu_to_le16(0);
+		else
+			shdr->CreditRequest = cpu_to_le16(
+				min_t(int, server->max_credits -
+						server->credits, credit_request));
+
+		rc = adjust_credits(server, &rdata->credits, rdata->bytes);
+		if (rc)
+			goto async_readv_out;
+
+		flags |= CIFS_HAS_CREDITS;
+	}
+
+	kref_get(&rdata->refcount);
+	rc = cifs_call_async(server, &rqst,
+			     cifs_readv_receive, smb2_readv_callback,
+			     smb3_handle_read_data, rdata, flags,
+			     &rdata->credits);
+	if (rc) {
+		kref_put(&rdata->refcount, cifs_readdata_release);
+		cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
+		trace_smb3_read_err(0 /* xid */, io_parms.persistent_fid,
+				    io_parms.tcon->tid,
+				    io_parms.tcon->ses->Suid,
+				    io_parms.offset, io_parms.length, rc);
+	}
+
+async_readv_out:
+	cifs_small_buf_release(buf);
+	return rc;
+}
+
+int
+SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
+	  unsigned int *nbytes, char **buf, int *buf_type)
+{
+	struct smb_rqst rqst;
+	int resp_buftype, rc;
+	struct smb2_read_req *req = NULL;
+	struct smb2_read_rsp *rsp = NULL;
+	struct kvec iov[1];
+	struct kvec rsp_iov;
+	unsigned int total_len;
+	int flags = CIFS_LOG_ERROR;
+	struct cifs_ses *ses = io_parms->tcon->ses;
+
+	if (!io_parms->server)
+		io_parms->server = cifs_pick_channel(io_parms->tcon->ses);
+
+	*nbytes = 0;
+	rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0);
+	if (rc)
+		return rc;
+
+	if (smb3_encryption_required(io_parms->tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	iov[0].iov_base = (char *)req;
+	iov[0].iov_len = total_len;
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	rqst.rq_iov = iov;
+	rqst.rq_nvec = 1;
+
+	rc = cifs_send_recv(xid, ses, io_parms->server,
+			    &rqst, &resp_buftype, flags, &rsp_iov);
+	rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
+
+	if (rc) {
+		if (rc != -ENODATA) {
+			cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
+			cifs_dbg(VFS, "Send error in read = %d\n", rc);
+			trace_smb3_read_err(xid,
+					    req->PersistentFileId,
+					    io_parms->tcon->tid, ses->Suid,
+					    io_parms->offset, io_parms->length,
+					    rc);
+		} else
+			trace_smb3_read_done(xid, req->PersistentFileId, io_parms->tcon->tid,
+					     ses->Suid, io_parms->offset, 0);
+		free_rsp_buf(resp_buftype, rsp_iov.iov_base);
+		cifs_small_buf_release(req);
+		return rc == -ENODATA ? 0 : rc;
+	} else
+		trace_smb3_read_done(xid,
+				    req->PersistentFileId,
+				    io_parms->tcon->tid, ses->Suid,
+				    io_parms->offset, io_parms->length);
+
+	cifs_small_buf_release(req);
+
+	*nbytes = le32_to_cpu(rsp->DataLength);
+	if ((*nbytes > CIFS_MAX_MSGSIZE) ||
+	    (*nbytes > io_parms->length)) {
+		cifs_dbg(FYI, "bad length %d for count %d\n",
+			 *nbytes, io_parms->length);
+		rc = -EIO;
+		*nbytes = 0;
+	}
+
+	if (*buf) {
+		memcpy(*buf, (char *)rsp + rsp->DataOffset, *nbytes);
+		free_rsp_buf(resp_buftype, rsp_iov.iov_base);
+	} else if (resp_buftype != CIFS_NO_BUFFER) {
+		*buf = rsp_iov.iov_base;
+		if (resp_buftype == CIFS_SMALL_BUFFER)
+			*buf_type = CIFS_SMALL_BUFFER;
+		else if (resp_buftype == CIFS_LARGE_BUFFER)
+			*buf_type = CIFS_LARGE_BUFFER;
+	}
+	return rc;
+}
+
+/*
+ * Check the mid_state and signature on received buffer (if any), and queue the
+ * workqueue completion task.
+ */
+static void
+smb2_writev_callback(struct mid_q_entry *mid)
+{
+	struct cifs_writedata *wdata = mid->callback_data;
+	struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
+	struct TCP_Server_Info *server = wdata->server;
+	unsigned int written;
+	struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
+	struct cifs_credits credits = { .value = 0, .instance = 0 };
+
+	WARN_ONCE(wdata->server != mid->server,
+		  "wdata server %p != mid server %p",
+		  wdata->server, mid->server);
+
+	switch (mid->mid_state) {
+	case MID_RESPONSE_RECEIVED:
+		credits.value = le16_to_cpu(rsp->hdr.CreditRequest);
+		credits.instance = server->reconnect_instance;
+		wdata->result = smb2_check_receive(mid, server, 0);
+		if (wdata->result != 0)
+			break;
+
+		written = le32_to_cpu(rsp->DataLength);
+		/*
+		 * Mask off high 16 bits when bytes written as returned
+		 * by the server is greater than bytes requested by the
+		 * client. OS/2 servers are known to set incorrect
+		 * CountHigh values.
+		 */
+		if (written > wdata->bytes)
+			written &= 0xFFFF;
+
+		if (written < wdata->bytes)
+			wdata->result = -ENOSPC;
+		else
+			wdata->bytes = written;
+		break;
+	case MID_REQUEST_SUBMITTED:
+	case MID_RETRY_NEEDED:
+		wdata->result = -EAGAIN;
+		break;
+	case MID_RESPONSE_MALFORMED:
+		credits.value = le16_to_cpu(rsp->hdr.CreditRequest);
+		credits.instance = server->reconnect_instance;
+		fallthrough;
+	default:
+		wdata->result = -EIO;
+		break;
+	}
+#ifdef CONFIG_CIFS_SMB_DIRECT
+	/*
+	 * If this wdata has a memory registered, the MR can be freed
+	 * The number of MRs available is limited, it's important to recover
+	 * used MR as soon as I/O is finished. Hold MR longer in the later
+	 * I/O process can possibly result in I/O deadlock due to lack of MR
+	 * to send request on I/O retry
+	 */
+	if (wdata->mr) {
+		smbd_deregister_mr(wdata->mr);
+		wdata->mr = NULL;
+	}
+#endif
+	if (wdata->result) {
+		cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
+		trace_smb3_write_err(0 /* no xid */,
+				     wdata->cfile->fid.persistent_fid,
+				     tcon->tid, tcon->ses->Suid, wdata->offset,
+				     wdata->bytes, wdata->result);
+		if (wdata->result == -ENOSPC)
+			pr_warn_once("Out of space writing to %s\n",
+				     tcon->tree_name);
+	} else
+		trace_smb3_write_done(0 /* no xid */,
+				      wdata->cfile->fid.persistent_fid,
+				      tcon->tid, tcon->ses->Suid,
+				      wdata->offset, wdata->bytes);
+
+	queue_work(cifsiod_wq, &wdata->work);
+	release_mid(mid);
+	add_credits(server, &credits, 0);
+}
+
+/* smb2_async_writev - send an async write, and set up mid to handle result */
+int
+smb2_async_writev(struct cifs_writedata *wdata,
+		  void (*release)(struct kref *kref))
+{
+	int rc = -EACCES, flags = 0;
+	struct smb2_write_req *req = NULL;
+	struct smb2_hdr *shdr;
+	struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
+	struct TCP_Server_Info *server = wdata->server;
+	struct kvec iov[1];
+	struct smb_rqst rqst = { };
+	unsigned int total_len;
+	struct cifs_io_parms _io_parms;
+	struct cifs_io_parms *io_parms = NULL;
+	int credit_request;
+
+	if (!wdata->server)
+		server = wdata->server = cifs_pick_channel(tcon->ses);
+
+	/*
+	 * in future we may get cifs_io_parms passed in from the caller,
+	 * but for now we construct it here...
+	 */
+	_io_parms = (struct cifs_io_parms) {
+		.tcon = tcon,
+		.server = server,
+		.offset = wdata->offset,
+		.length = wdata->bytes,
+		.persistent_fid = wdata->cfile->fid.persistent_fid,
+		.volatile_fid = wdata->cfile->fid.volatile_fid,
+		.pid = wdata->pid,
+	};
+	io_parms = &_io_parms;
+
+	rc = smb2_plain_req_init(SMB2_WRITE, tcon, server,
+				 (void **) &req, &total_len);
+	if (rc)
+		return rc;
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	shdr = (struct smb2_hdr *)req;
+	shdr->Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid);
+
+	req->PersistentFileId = io_parms->persistent_fid;
+	req->VolatileFileId = io_parms->volatile_fid;
+	req->WriteChannelInfoOffset = 0;
+	req->WriteChannelInfoLength = 0;
+	req->Channel = SMB2_CHANNEL_NONE;
+	req->Offset = cpu_to_le64(io_parms->offset);
+	req->DataOffset = cpu_to_le16(
+				offsetof(struct smb2_write_req, Buffer));
+	req->RemainingBytes = 0;
+
+	trace_smb3_write_enter(0 /* xid */,
+			       io_parms->persistent_fid,
+			       io_parms->tcon->tid,
+			       io_parms->tcon->ses->Suid,
+			       io_parms->offset,
+			       io_parms->length);
+
+#ifdef CONFIG_CIFS_SMB_DIRECT
+	/*
+	 * If we want to do a server RDMA read, fill in and append
+	 * smbd_buffer_descriptor_v1 to the end of write request
+	 */
+	if (smb3_use_rdma_offload(io_parms)) {
+		struct smbd_buffer_descriptor_v1 *v1;
+		size_t data_size = iov_iter_count(&wdata->iter);
+		bool need_invalidate = server->dialect == SMB30_PROT_ID;
+
+		wdata->mr = smbd_register_mr(server->smbd_conn, &wdata->iter,
+					     false, need_invalidate);
+		if (!wdata->mr) {
+			rc = -EAGAIN;
+			goto async_writev_out;
+		}
+		req->Length = 0;
+		req->DataOffset = 0;
+		req->RemainingBytes = cpu_to_le32(data_size);
+		req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
+		if (need_invalidate)
+			req->Channel = SMB2_CHANNEL_RDMA_V1;
+		req->WriteChannelInfoOffset =
+			cpu_to_le16(offsetof(struct smb2_write_req, Buffer));
+		req->WriteChannelInfoLength =
+			cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
+		v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
+		v1->offset = cpu_to_le64(wdata->mr->mr->iova);
+		v1->token = cpu_to_le32(wdata->mr->mr->rkey);
+		v1->length = cpu_to_le32(wdata->mr->mr->length);
+	}
+#endif
+	iov[0].iov_len = total_len - 1;
+	iov[0].iov_base = (char *)req;
+
+	rqst.rq_iov = iov;
+	rqst.rq_nvec = 1;
+	rqst.rq_iter = wdata->iter;
+	rqst.rq_iter_size = iov_iter_count(&rqst.rq_iter);
+#ifdef CONFIG_CIFS_SMB_DIRECT
+	if (wdata->mr)
+		iov[0].iov_len += sizeof(struct smbd_buffer_descriptor_v1);
+#endif
+	cifs_dbg(FYI, "async write at %llu %u bytes iter=%zx\n",
+		 io_parms->offset, io_parms->length, iov_iter_count(&rqst.rq_iter));
+
+#ifdef CONFIG_CIFS_SMB_DIRECT
+	/* For RDMA read, I/O size is in RemainingBytes not in Length */
+	if (!wdata->mr)
+		req->Length = cpu_to_le32(io_parms->length);
+#else
+	req->Length = cpu_to_le32(io_parms->length);
+#endif
+
+	if (wdata->credits.value > 0) {
+		shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
+						    SMB2_MAX_BUFFER_SIZE));
+		credit_request = le16_to_cpu(shdr->CreditCharge) + 8;
+		if (server->credits >= server->max_credits)
+			shdr->CreditRequest = cpu_to_le16(0);
+		else
+			shdr->CreditRequest = cpu_to_le16(
+				min_t(int, server->max_credits -
+						server->credits, credit_request));
+
+		rc = adjust_credits(server, &wdata->credits, io_parms->length);
+		if (rc)
+			goto async_writev_out;
+
+		flags |= CIFS_HAS_CREDITS;
+	}
+
+	kref_get(&wdata->refcount);
+	rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
+			     wdata, flags, &wdata->credits);
+
+	if (rc) {
+		trace_smb3_write_err(0 /* no xid */,
+				     io_parms->persistent_fid,
+				     io_parms->tcon->tid,
+				     io_parms->tcon->ses->Suid,
+				     io_parms->offset,
+				     io_parms->length,
+				     rc);
+		kref_put(&wdata->refcount, release);
+		cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
+	}
+
+async_writev_out:
+	cifs_small_buf_release(req);
+	return rc;
+}
+
+/*
+ * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
+ * The length field from io_parms must be at least 1 and indicates a number of
+ * elements with data to write that begins with position 1 in iov array. All
+ * data length is specified by count.
+ */
+int
+SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
+	   unsigned int *nbytes, struct kvec *iov, int n_vec)
+{
+	struct smb_rqst rqst;
+	int rc = 0;
+	struct smb2_write_req *req = NULL;
+	struct smb2_write_rsp *rsp = NULL;
+	int resp_buftype;
+	struct kvec rsp_iov;
+	int flags = 0;
+	unsigned int total_len;
+	struct TCP_Server_Info *server;
+
+	*nbytes = 0;
+
+	if (n_vec < 1)
+		return rc;
+
+	if (!io_parms->server)
+		io_parms->server = cifs_pick_channel(io_parms->tcon->ses);
+	server = io_parms->server;
+	if (server == NULL)
+		return -ECONNABORTED;
+
+	rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, server,
+				 (void **) &req, &total_len);
+	if (rc)
+		return rc;
+
+	if (smb3_encryption_required(io_parms->tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	req->hdr.Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid);
+
+	req->PersistentFileId = io_parms->persistent_fid;
+	req->VolatileFileId = io_parms->volatile_fid;
+	req->WriteChannelInfoOffset = 0;
+	req->WriteChannelInfoLength = 0;
+	req->Channel = 0;
+	req->Length = cpu_to_le32(io_parms->length);
+	req->Offset = cpu_to_le64(io_parms->offset);
+	req->DataOffset = cpu_to_le16(
+				offsetof(struct smb2_write_req, Buffer));
+	req->RemainingBytes = 0;
+
+	trace_smb3_write_enter(xid, io_parms->persistent_fid,
+		io_parms->tcon->tid, io_parms->tcon->ses->Suid,
+		io_parms->offset, io_parms->length);
+
+	iov[0].iov_base = (char *)req;
+	/* 1 for Buffer */
+	iov[0].iov_len = total_len - 1;
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	rqst.rq_iov = iov;
+	rqst.rq_nvec = n_vec + 1;
+
+	rc = cifs_send_recv(xid, io_parms->tcon->ses, server,
+			    &rqst,
+			    &resp_buftype, flags, &rsp_iov);
+	rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
+
+	if (rc) {
+		trace_smb3_write_err(xid,
+				     req->PersistentFileId,
+				     io_parms->tcon->tid,
+				     io_parms->tcon->ses->Suid,
+				     io_parms->offset, io_parms->length, rc);
+		cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
+		cifs_dbg(VFS, "Send error in write = %d\n", rc);
+	} else {
+		*nbytes = le32_to_cpu(rsp->DataLength);
+		trace_smb3_write_done(xid,
+				      req->PersistentFileId,
+				      io_parms->tcon->tid,
+				      io_parms->tcon->ses->Suid,
+				      io_parms->offset, *nbytes);
+	}
+
+	cifs_small_buf_release(req);
+	free_rsp_buf(resp_buftype, rsp);
+	return rc;
+}
+
+int posix_info_sid_size(const void *beg, const void *end)
+{
+	size_t subauth;
+	int total;
+
+	if (beg + 1 > end)
+		return -1;
+
+	subauth = *(u8 *)(beg+1);
+	if (subauth < 1 || subauth > 15)
+		return -1;
+
+	total = 1 + 1 + 6 + 4*subauth;
+	if (beg + total > end)
+		return -1;
+
+	return total;
+}
+
+int posix_info_parse(const void *beg, const void *end,
+		     struct smb2_posix_info_parsed *out)
+
+{
+	int total_len = 0;
+	int owner_len, group_len;
+	int name_len;
+	const void *owner_sid;
+	const void *group_sid;
+	const void *name;
+
+	/* if no end bound given, assume payload to be correct */
+	if (!end) {
+		const struct smb2_posix_info *p = beg;
+
+		end = beg + le32_to_cpu(p->NextEntryOffset);
+		/* last element will have a 0 offset, pick a sensible bound */
+		if (end == beg)
+			end += 0xFFFF;
+	}
+
+	/* check base buf */
+	if (beg + sizeof(struct smb2_posix_info) > end)
+		return -1;
+	total_len = sizeof(struct smb2_posix_info);
+
+	/* check owner sid */
+	owner_sid = beg + total_len;
+	owner_len = posix_info_sid_size(owner_sid, end);
+	if (owner_len < 0)
+		return -1;
+	total_len += owner_len;
+
+	/* check group sid */
+	group_sid = beg + total_len;
+	group_len = posix_info_sid_size(group_sid, end);
+	if (group_len < 0)
+		return -1;
+	total_len += group_len;
+
+	/* check name len */
+	if (beg + total_len + 4 > end)
+		return -1;
+	name_len = le32_to_cpu(*(__le32 *)(beg + total_len));
+	if (name_len < 1 || name_len > 0xFFFF)
+		return -1;
+	total_len += 4;
+
+	/* check name */
+	name = beg + total_len;
+	if (name + name_len > end)
+		return -1;
+	total_len += name_len;
+
+	if (out) {
+		out->base = beg;
+		out->size = total_len;
+		out->name_len = name_len;
+		out->name = name;
+		memcpy(&out->owner, owner_sid, owner_len);
+		memcpy(&out->group, group_sid, group_len);
+	}
+	return total_len;
+}
+
+static int posix_info_extra_size(const void *beg, const void *end)
+{
+	int len = posix_info_parse(beg, end, NULL);
+
+	if (len < 0)
+		return -1;
+	return len - sizeof(struct smb2_posix_info);
+}
+
+static unsigned int
+num_entries(int infotype, char *bufstart, char *end_of_buf, char **lastentry,
+	    size_t size)
+{
+	int len;
+	unsigned int entrycount = 0;
+	unsigned int next_offset = 0;
+	char *entryptr;
+	FILE_DIRECTORY_INFO *dir_info;
+
+	if (bufstart == NULL)
+		return 0;
+
+	entryptr = bufstart;
+
+	while (1) {
+		if (entryptr + next_offset < entryptr ||
+		    entryptr + next_offset > end_of_buf ||
+		    entryptr + next_offset + size > end_of_buf) {
+			cifs_dbg(VFS, "malformed search entry would overflow\n");
+			break;
+		}
+
+		entryptr = entryptr + next_offset;
+		dir_info = (FILE_DIRECTORY_INFO *)entryptr;
+
+		if (infotype == SMB_FIND_FILE_POSIX_INFO)
+			len = posix_info_extra_size(entryptr, end_of_buf);
+		else
+			len = le32_to_cpu(dir_info->FileNameLength);
+
+		if (len < 0 ||
+		    entryptr + len < entryptr ||
+		    entryptr + len > end_of_buf ||
+		    entryptr + len + size > end_of_buf) {
+			cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
+				 end_of_buf);
+			break;
+		}
+
+		*lastentry = entryptr;
+		entrycount++;
+
+		next_offset = le32_to_cpu(dir_info->NextEntryOffset);
+		if (!next_offset)
+			break;
+	}
+
+	return entrycount;
+}
+
+/*
+ * Readdir/FindFirst
+ */
+int SMB2_query_directory_init(const unsigned int xid,
+			      struct cifs_tcon *tcon,
+			      struct TCP_Server_Info *server,
+			      struct smb_rqst *rqst,
+			      u64 persistent_fid, u64 volatile_fid,
+			      int index, int info_level)
+{
+	struct smb2_query_directory_req *req;
+	unsigned char *bufptr;
+	__le16 asteriks = cpu_to_le16('*');
+	unsigned int output_size = CIFSMaxBufSize -
+		MAX_SMB2_CREATE_RESPONSE_SIZE -
+		MAX_SMB2_CLOSE_RESPONSE_SIZE;
+	unsigned int total_len;
+	struct kvec *iov = rqst->rq_iov;
+	int len, rc;
+
+	rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, server,
+				 (void **) &req, &total_len);
+	if (rc)
+		return rc;
+
+	switch (info_level) {
+	case SMB_FIND_FILE_DIRECTORY_INFO:
+		req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
+		break;
+	case SMB_FIND_FILE_ID_FULL_DIR_INFO:
+		req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
+		break;
+	case SMB_FIND_FILE_POSIX_INFO:
+		req->FileInformationClass = SMB_FIND_FILE_POSIX_INFO;
+		break;
+	default:
+		cifs_tcon_dbg(VFS, "info level %u isn't supported\n",
+			info_level);
+		return -EINVAL;
+	}
+
+	req->FileIndex = cpu_to_le32(index);
+	req->PersistentFileId = persistent_fid;
+	req->VolatileFileId = volatile_fid;
+
+	len = 0x2;
+	bufptr = req->Buffer;
+	memcpy(bufptr, &asteriks, len);
+
+	req->FileNameOffset =
+		cpu_to_le16(sizeof(struct smb2_query_directory_req));
+	req->FileNameLength = cpu_to_le16(len);
+	/*
+	 * BB could be 30 bytes or so longer if we used SMB2 specific
+	 * buffer lengths, but this is safe and close enough.
+	 */
+	output_size = min_t(unsigned int, output_size, server->maxBuf);
+	output_size = min_t(unsigned int, output_size, 2 << 15);
+	req->OutputBufferLength = cpu_to_le32(output_size);
+
+	iov[0].iov_base = (char *)req;
+	/* 1 for Buffer */
+	iov[0].iov_len = total_len - 1;
+
+	iov[1].iov_base = (char *)(req->Buffer);
+	iov[1].iov_len = len;
+
+	trace_smb3_query_dir_enter(xid, persistent_fid, tcon->tid,
+			tcon->ses->Suid, index, output_size);
+
+	return 0;
+}
+
+void SMB2_query_directory_free(struct smb_rqst *rqst)
+{
+	if (rqst && rqst->rq_iov) {
+		cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
+	}
+}
+
+int
+smb2_parse_query_directory(struct cifs_tcon *tcon,
+			   struct kvec *rsp_iov,
+			   int resp_buftype,
+			   struct cifs_search_info *srch_inf)
+{
+	struct smb2_query_directory_rsp *rsp;
+	size_t info_buf_size;
+	char *end_of_smb;
+	int rc;
+
+	rsp = (struct smb2_query_directory_rsp *)rsp_iov->iov_base;
+
+	switch (srch_inf->info_level) {
+	case SMB_FIND_FILE_DIRECTORY_INFO:
+		info_buf_size = sizeof(FILE_DIRECTORY_INFO);
+		break;
+	case SMB_FIND_FILE_ID_FULL_DIR_INFO:
+		info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO);
+		break;
+	case SMB_FIND_FILE_POSIX_INFO:
+		/* note that posix payload are variable size */
+		info_buf_size = sizeof(struct smb2_posix_info);
+		break;
+	default:
+		cifs_tcon_dbg(VFS, "info level %u isn't supported\n",
+			 srch_inf->info_level);
+		return -EINVAL;
+	}
+
+	rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
+			       le32_to_cpu(rsp->OutputBufferLength), rsp_iov,
+			       info_buf_size);
+	if (rc) {
+		cifs_tcon_dbg(VFS, "bad info payload");
+		return rc;
+	}
+
+	srch_inf->unicode = true;
+
+	if (srch_inf->ntwrk_buf_start) {
+		if (srch_inf->smallBuf)
+			cifs_small_buf_release(srch_inf->ntwrk_buf_start);
+		else
+			cifs_buf_release(srch_inf->ntwrk_buf_start);
+	}
+	srch_inf->ntwrk_buf_start = (char *)rsp;
+	srch_inf->srch_entries_start = srch_inf->last_entry =
+		(char *)rsp + le16_to_cpu(rsp->OutputBufferOffset);
+	end_of_smb = rsp_iov->iov_len + (char *)rsp;
+
+	srch_inf->entries_in_buffer = num_entries(
+		srch_inf->info_level,
+		srch_inf->srch_entries_start,
+		end_of_smb,
+		&srch_inf->last_entry,
+		info_buf_size);
+
+	srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
+	cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
+		 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
+		 srch_inf->srch_entries_start, srch_inf->last_entry);
+	if (resp_buftype == CIFS_LARGE_BUFFER)
+		srch_inf->smallBuf = false;
+	else if (resp_buftype == CIFS_SMALL_BUFFER)
+		srch_inf->smallBuf = true;
+	else
+		cifs_tcon_dbg(VFS, "Invalid search buffer type\n");
+
+	return 0;
+}
+
+int
+SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
+		     u64 persistent_fid, u64 volatile_fid, int index,
+		     struct cifs_search_info *srch_inf)
+{
+	struct smb_rqst rqst;
+	struct kvec iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
+	struct smb2_query_directory_rsp *rsp = NULL;
+	int resp_buftype = CIFS_NO_BUFFER;
+	struct kvec rsp_iov;
+	int rc = 0;
+	struct cifs_ses *ses = tcon->ses;
+	struct TCP_Server_Info *server = cifs_pick_channel(ses);
+	int flags = 0;
+
+	if (!ses || !(ses->server))
+		return -EIO;
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	memset(&iov, 0, sizeof(iov));
+	rqst.rq_iov = iov;
+	rqst.rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
+
+	rc = SMB2_query_directory_init(xid, tcon, server,
+				       &rqst, persistent_fid,
+				       volatile_fid, index,
+				       srch_inf->info_level);
+	if (rc)
+		goto qdir_exit;
+
+	rc = cifs_send_recv(xid, ses, server,
+			    &rqst, &resp_buftype, flags, &rsp_iov);
+	rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
+
+	if (rc) {
+		if (rc == -ENODATA &&
+		    rsp->hdr.Status == STATUS_NO_MORE_FILES) {
+			trace_smb3_query_dir_done(xid, persistent_fid,
+				tcon->tid, tcon->ses->Suid, index, 0);
+			srch_inf->endOfSearch = true;
+			rc = 0;
+		} else {
+			trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
+				tcon->ses->Suid, index, 0, rc);
+			cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
+		}
+		goto qdir_exit;
+	}
+
+	rc = smb2_parse_query_directory(tcon, &rsp_iov,	resp_buftype,
+					srch_inf);
+	if (rc) {
+		trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
+			tcon->ses->Suid, index, 0, rc);
+		goto qdir_exit;
+	}
+	resp_buftype = CIFS_NO_BUFFER;
+
+	trace_smb3_query_dir_done(xid, persistent_fid, tcon->tid,
+			tcon->ses->Suid, index, srch_inf->entries_in_buffer);
+
+qdir_exit:
+	SMB2_query_directory_free(&rqst);
+	free_rsp_buf(resp_buftype, rsp);
+	return rc;
+}
+
+int
+SMB2_set_info_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
+		   struct smb_rqst *rqst,
+		   u64 persistent_fid, u64 volatile_fid, u32 pid,
+		   u8 info_class, u8 info_type, u32 additional_info,
+		   void **data, unsigned int *size)
+{
+	struct smb2_set_info_req *req;
+	struct kvec *iov = rqst->rq_iov;
+	unsigned int i, total_len;
+	int rc;
+
+	rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, server,
+				 (void **) &req, &total_len);
+	if (rc)
+		return rc;
+
+	req->hdr.Id.SyncId.ProcessId = cpu_to_le32(pid);
+	req->InfoType = info_type;
+	req->FileInfoClass = info_class;
+	req->PersistentFileId = persistent_fid;
+	req->VolatileFileId = volatile_fid;
+	req->AdditionalInformation = cpu_to_le32(additional_info);
+
+	req->BufferOffset = cpu_to_le16(sizeof(struct smb2_set_info_req));
+	req->BufferLength = cpu_to_le32(*size);
+
+	memcpy(req->Buffer, *data, *size);
+	total_len += *size;
+
+	iov[0].iov_base = (char *)req;
+	/* 1 for Buffer */
+	iov[0].iov_len = total_len - 1;
+
+	for (i = 1; i < rqst->rq_nvec; i++) {
+		le32_add_cpu(&req->BufferLength, size[i]);
+		iov[i].iov_base = (char *)data[i];
+		iov[i].iov_len = size[i];
+	}
+
+	return 0;
+}
+
+void
+SMB2_set_info_free(struct smb_rqst *rqst)
+{
+	if (rqst && rqst->rq_iov)
+		cifs_buf_release(rqst->rq_iov[0].iov_base); /* request */
+}
+
+static int
+send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
+	       u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class,
+	       u8 info_type, u32 additional_info, unsigned int num,
+		void **data, unsigned int *size)
+{
+	struct smb_rqst rqst;
+	struct smb2_set_info_rsp *rsp = NULL;
+	struct kvec *iov;
+	struct kvec rsp_iov;
+	int rc = 0;
+	int resp_buftype;
+	struct cifs_ses *ses = tcon->ses;
+	struct TCP_Server_Info *server = cifs_pick_channel(ses);
+	int flags = 0;
+
+	if (!ses || !server)
+		return -EIO;
+
+	if (!num)
+		return -EINVAL;
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	iov = kmalloc_array(num, sizeof(struct kvec), GFP_KERNEL);
+	if (!iov)
+		return -ENOMEM;
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	rqst.rq_iov = iov;
+	rqst.rq_nvec = num;
+
+	rc = SMB2_set_info_init(tcon, server,
+				&rqst, persistent_fid, volatile_fid, pid,
+				info_class, info_type, additional_info,
+				data, size);
+	if (rc) {
+		kfree(iov);
+		return rc;
+	}
+
+
+	rc = cifs_send_recv(xid, ses, server,
+			    &rqst, &resp_buftype, flags,
+			    &rsp_iov);
+	SMB2_set_info_free(&rqst);
+	rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
+
+	if (rc != 0) {
+		cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
+		trace_smb3_set_info_err(xid, persistent_fid, tcon->tid,
+				ses->Suid, info_class, (__u32)info_type, rc);
+	}
+
+	free_rsp_buf(resp_buftype, rsp);
+	kfree(iov);
+	return rc;
+}
+
+int
+SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
+	     u64 volatile_fid, u32 pid, __le64 *eof)
+{
+	struct smb2_file_eof_info info;
+	void *data;
+	unsigned int size;
+
+	info.EndOfFile = *eof;
+
+	data = &info;
+	size = sizeof(struct smb2_file_eof_info);
+
+	trace_smb3_set_eof(xid, persistent_fid, tcon->tid, tcon->ses->Suid, le64_to_cpu(*eof));
+
+	return send_set_info(xid, tcon, persistent_fid, volatile_fid,
+			pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE,
+			0, 1, &data, &size);
+}
+
+int
+SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
+		u64 persistent_fid, u64 volatile_fid,
+		struct cifs_ntsd *pnntsd, int pacllen, int aclflag)
+{
+	return send_set_info(xid, tcon, persistent_fid, volatile_fid,
+			current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag,
+			1, (void **)&pnntsd, &pacllen);
+}
+
+int
+SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
+	    u64 persistent_fid, u64 volatile_fid,
+	    struct smb2_file_full_ea_info *buf, int len)
+{
+	return send_set_info(xid, tcon, persistent_fid, volatile_fid,
+		current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE,
+		0, 1, (void **)&buf, &len);
+}
+
+int
+SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
+		  const u64 persistent_fid, const u64 volatile_fid,
+		  __u8 oplock_level)
+{
+	struct smb_rqst rqst;
+	int rc;
+	struct smb2_oplock_break *req = NULL;
+	struct cifs_ses *ses = tcon->ses;
+	struct TCP_Server_Info *server = cifs_pick_channel(ses);
+	int flags = CIFS_OBREAK_OP;
+	unsigned int total_len;
+	struct kvec iov[1];
+	struct kvec rsp_iov;
+	int resp_buf_type;
+
+	cifs_dbg(FYI, "SMB2_oplock_break\n");
+	rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, server,
+				 (void **) &req, &total_len);
+	if (rc)
+		return rc;
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	req->VolatileFid = volatile_fid;
+	req->PersistentFid = persistent_fid;
+	req->OplockLevel = oplock_level;
+	req->hdr.CreditRequest = cpu_to_le16(1);
+
+	flags |= CIFS_NO_RSP_BUF;
+
+	iov[0].iov_base = (char *)req;
+	iov[0].iov_len = total_len;
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	rqst.rq_iov = iov;
+	rqst.rq_nvec = 1;
+
+	rc = cifs_send_recv(xid, ses, server,
+			    &rqst, &resp_buf_type, flags, &rsp_iov);
+	cifs_small_buf_release(req);
+
+	if (rc) {
+		cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
+		cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
+	}
+
+	return rc;
+}
+
+void
+smb2_copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
+			     struct kstatfs *kst)
+{
+	kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
+			  le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
+	kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
+	kst->f_bfree  = kst->f_bavail =
+			le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
+	return;
+}
+
+static void
+copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO *response_data,
+			struct kstatfs *kst)
+{
+	kst->f_bsize = le32_to_cpu(response_data->BlockSize);
+	kst->f_blocks = le64_to_cpu(response_data->TotalBlocks);
+	kst->f_bfree =  le64_to_cpu(response_data->BlocksAvail);
+	if (response_data->UserBlocksAvail == cpu_to_le64(-1))
+		kst->f_bavail = kst->f_bfree;
+	else
+		kst->f_bavail = le64_to_cpu(response_data->UserBlocksAvail);
+	if (response_data->TotalFileNodes != cpu_to_le64(-1))
+		kst->f_files = le64_to_cpu(response_data->TotalFileNodes);
+	if (response_data->FreeFileNodes != cpu_to_le64(-1))
+		kst->f_ffree = le64_to_cpu(response_data->FreeFileNodes);
+
+	return;
+}
+
+static int
+build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon,
+		   struct TCP_Server_Info *server,
+		   int level, int outbuf_len, u64 persistent_fid,
+		   u64 volatile_fid)
+{
+	int rc;
+	struct smb2_query_info_req *req;
+	unsigned int total_len;
+
+	cifs_dbg(FYI, "Query FSInfo level %d\n", level);
+
+	if ((tcon->ses == NULL) || server == NULL)
+		return -EIO;
+
+	rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, server,
+				 (void **) &req, &total_len);
+	if (rc)
+		return rc;
+
+	req->InfoType = SMB2_O_INFO_FILESYSTEM;
+	req->FileInfoClass = level;
+	req->PersistentFileId = persistent_fid;
+	req->VolatileFileId = volatile_fid;
+	/* 1 for pad */
+	req->InputBufferOffset =
+			cpu_to_le16(sizeof(struct smb2_query_info_req));
+	req->OutputBufferLength = cpu_to_le32(
+		outbuf_len + sizeof(struct smb2_query_info_rsp));
+
+	iov->iov_base = (char *)req;
+	iov->iov_len = total_len;
+	return 0;
+}
+
+static inline void free_qfs_info_req(struct kvec *iov)
+{
+	cifs_buf_release(iov->iov_base);
+}
+
+int
+SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon,
+	      u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
+{
+	struct smb_rqst rqst;
+	struct smb2_query_info_rsp *rsp = NULL;
+	struct kvec iov;
+	struct kvec rsp_iov;
+	int rc = 0;
+	int resp_buftype;
+	struct cifs_ses *ses = tcon->ses;
+	struct TCP_Server_Info *server = cifs_pick_channel(ses);
+	FILE_SYSTEM_POSIX_INFO *info = NULL;
+	int flags = 0;
+
+	rc = build_qfs_info_req(&iov, tcon, server,
+				FS_POSIX_INFORMATION,
+				sizeof(FILE_SYSTEM_POSIX_INFO),
+				persistent_fid, volatile_fid);
+	if (rc)
+		return rc;
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	rqst.rq_iov = &iov;
+	rqst.rq_nvec = 1;
+
+	rc = cifs_send_recv(xid, ses, server,
+			    &rqst, &resp_buftype, flags, &rsp_iov);
+	free_qfs_info_req(&iov);
+	if (rc) {
+		cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
+		goto posix_qfsinf_exit;
+	}
+	rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
+
+	info = (FILE_SYSTEM_POSIX_INFO *)(
+		le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
+	rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
+			       le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
+			       sizeof(FILE_SYSTEM_POSIX_INFO));
+	if (!rc)
+		copy_posix_fs_info_to_kstatfs(info, fsdata);
+
+posix_qfsinf_exit:
+	free_rsp_buf(resp_buftype, rsp_iov.iov_base);
+	return rc;
+}
+
+int
+SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
+	      u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
+{
+	struct smb_rqst rqst;
+	struct smb2_query_info_rsp *rsp = NULL;
+	struct kvec iov;
+	struct kvec rsp_iov;
+	int rc = 0;
+	int resp_buftype;
+	struct cifs_ses *ses = tcon->ses;
+	struct TCP_Server_Info *server = cifs_pick_channel(ses);
+	struct smb2_fs_full_size_info *info = NULL;
+	int flags = 0;
+
+	rc = build_qfs_info_req(&iov, tcon, server,
+				FS_FULL_SIZE_INFORMATION,
+				sizeof(struct smb2_fs_full_size_info),
+				persistent_fid, volatile_fid);
+	if (rc)
+		return rc;
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	rqst.rq_iov = &iov;
+	rqst.rq_nvec = 1;
+
+	rc = cifs_send_recv(xid, ses, server,
+			    &rqst, &resp_buftype, flags, &rsp_iov);
+	free_qfs_info_req(&iov);
+	if (rc) {
+		cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
+		goto qfsinf_exit;
+	}
+	rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
+
+	info = (struct smb2_fs_full_size_info *)(
+		le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
+	rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
+			       le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
+			       sizeof(struct smb2_fs_full_size_info));
+	if (!rc)
+		smb2_copy_fs_info_to_kstatfs(info, fsdata);
+
+qfsinf_exit:
+	free_rsp_buf(resp_buftype, rsp_iov.iov_base);
+	return rc;
+}
+
+int
+SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
+	      u64 persistent_fid, u64 volatile_fid, int level)
+{
+	struct smb_rqst rqst;
+	struct smb2_query_info_rsp *rsp = NULL;
+	struct kvec iov;
+	struct kvec rsp_iov;
+	int rc = 0;
+	int resp_buftype, max_len, min_len;
+	struct cifs_ses *ses = tcon->ses;
+	struct TCP_Server_Info *server = cifs_pick_channel(ses);
+	unsigned int rsp_len, offset;
+	int flags = 0;
+
+	if (level == FS_DEVICE_INFORMATION) {
+		max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
+		min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
+	} else if (level == FS_ATTRIBUTE_INFORMATION) {
+		max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
+		min_len = MIN_FS_ATTR_INFO_SIZE;
+	} else if (level == FS_SECTOR_SIZE_INFORMATION) {
+		max_len = sizeof(struct smb3_fs_ss_info);
+		min_len = sizeof(struct smb3_fs_ss_info);
+	} else if (level == FS_VOLUME_INFORMATION) {
+		max_len = sizeof(struct smb3_fs_vol_info) + MAX_VOL_LABEL_LEN;
+		min_len = sizeof(struct smb3_fs_vol_info);
+	} else {
+		cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
+		return -EINVAL;
+	}
+
+	rc = build_qfs_info_req(&iov, tcon, server,
+				level, max_len,
+				persistent_fid, volatile_fid);
+	if (rc)
+		return rc;
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	rqst.rq_iov = &iov;
+	rqst.rq_nvec = 1;
+
+	rc = cifs_send_recv(xid, ses, server,
+			    &rqst, &resp_buftype, flags, &rsp_iov);
+	free_qfs_info_req(&iov);
+	if (rc) {
+		cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
+		goto qfsattr_exit;
+	}
+	rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
+
+	rsp_len = le32_to_cpu(rsp->OutputBufferLength);
+	offset = le16_to_cpu(rsp->OutputBufferOffset);
+	rc = smb2_validate_iov(offset, rsp_len, &rsp_iov, min_len);
+	if (rc)
+		goto qfsattr_exit;
+
+	if (level == FS_ATTRIBUTE_INFORMATION)
+		memcpy(&tcon->fsAttrInfo, offset
+			+ (char *)rsp, min_t(unsigned int,
+			rsp_len, max_len));
+	else if (level == FS_DEVICE_INFORMATION)
+		memcpy(&tcon->fsDevInfo, offset
+			+ (char *)rsp, sizeof(FILE_SYSTEM_DEVICE_INFO));
+	else if (level == FS_SECTOR_SIZE_INFORMATION) {
+		struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
+			(offset + (char *)rsp);
+		tcon->ss_flags = le32_to_cpu(ss_info->Flags);
+		tcon->perf_sector_size =
+			le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
+	} else if (level == FS_VOLUME_INFORMATION) {
+		struct smb3_fs_vol_info *vol_info = (struct smb3_fs_vol_info *)
+			(offset + (char *)rsp);
+		tcon->vol_serial_number = vol_info->VolumeSerialNumber;
+		tcon->vol_create_time = vol_info->VolumeCreationTime;
+	}
+
+qfsattr_exit:
+	free_rsp_buf(resp_buftype, rsp_iov.iov_base);
+	return rc;
+}
+
+int
+smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
+	   const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
+	   const __u32 num_lock, struct smb2_lock_element *buf)
+{
+	struct smb_rqst rqst;
+	int rc = 0;
+	struct smb2_lock_req *req = NULL;
+	struct kvec iov[2];
+	struct kvec rsp_iov;
+	int resp_buf_type;
+	unsigned int count;
+	int flags = CIFS_NO_RSP_BUF;
+	unsigned int total_len;
+	struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
+
+	cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
+
+	rc = smb2_plain_req_init(SMB2_LOCK, tcon, server,
+				 (void **) &req, &total_len);
+	if (rc)
+		return rc;
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	req->hdr.Id.SyncId.ProcessId = cpu_to_le32(pid);
+	req->LockCount = cpu_to_le16(num_lock);
+
+	req->PersistentFileId = persist_fid;
+	req->VolatileFileId = volatile_fid;
+
+	count = num_lock * sizeof(struct smb2_lock_element);
+
+	iov[0].iov_base = (char *)req;
+	iov[0].iov_len = total_len - sizeof(struct smb2_lock_element);
+	iov[1].iov_base = (char *)buf;
+	iov[1].iov_len = count;
+
+	cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	rqst.rq_iov = iov;
+	rqst.rq_nvec = 2;
+
+	rc = cifs_send_recv(xid, tcon->ses, server,
+			    &rqst, &resp_buf_type, flags,
+			    &rsp_iov);
+	cifs_small_buf_release(req);
+	if (rc) {
+		cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
+		cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
+		trace_smb3_lock_err(xid, persist_fid, tcon->tid,
+				    tcon->ses->Suid, rc);
+	}
+
+	return rc;
+}
+
+int
+SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
+	  const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
+	  const __u64 length, const __u64 offset, const __u32 lock_flags,
+	  const bool wait)
+{
+	struct smb2_lock_element lock;
+
+	lock.Offset = cpu_to_le64(offset);
+	lock.Length = cpu_to_le64(length);
+	lock.Flags = cpu_to_le32(lock_flags);
+	if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
+		lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
+
+	return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
+}
+
+int
+SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
+		 __u8 *lease_key, const __le32 lease_state)
+{
+	struct smb_rqst rqst;
+	int rc;
+	struct smb2_lease_ack *req = NULL;
+	struct cifs_ses *ses = tcon->ses;
+	int flags = CIFS_OBREAK_OP;
+	unsigned int total_len;
+	struct kvec iov[1];
+	struct kvec rsp_iov;
+	int resp_buf_type;
+	__u64 *please_key_high;
+	__u64 *please_key_low;
+	struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
+
+	cifs_dbg(FYI, "SMB2_lease_break\n");
+	rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, server,
+				 (void **) &req, &total_len);
+	if (rc)
+		return rc;
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	req->hdr.CreditRequest = cpu_to_le16(1);
+	req->StructureSize = cpu_to_le16(36);
+	total_len += 12;
+
+	memcpy(req->LeaseKey, lease_key, 16);
+	req->LeaseState = lease_state;
+
+	flags |= CIFS_NO_RSP_BUF;
+
+	iov[0].iov_base = (char *)req;
+	iov[0].iov_len = total_len;
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	rqst.rq_iov = iov;
+	rqst.rq_nvec = 1;
+
+	rc = cifs_send_recv(xid, ses, server,
+			    &rqst, &resp_buf_type, flags, &rsp_iov);
+	cifs_small_buf_release(req);
+
+	please_key_low = (__u64 *)lease_key;
+	please_key_high = (__u64 *)(lease_key+8);
+	if (rc) {
+		cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
+		trace_smb3_lease_err(le32_to_cpu(lease_state), tcon->tid,
+			ses->Suid, *please_key_low, *please_key_high, rc);
+		cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
+	} else
+		trace_smb3_lease_done(le32_to_cpu(lease_state), tcon->tid,
+			ses->Suid, *please_key_low, *please_key_high);
+
+	return rc;
+}
diff --git a/fs/smb/client/smb2pdu.h b/fs/smb/client/smb2pdu.h
new file mode 100644
index 0000000000..db08194484
--- /dev/null
+++ b/fs/smb/client/smb2pdu.h
@@ -0,0 +1,416 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+/*
+ *
+ *   Copyright (c) International Business Machines  Corp., 2009, 2013
+ *                 Etersoft, 2012
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *              Pavel Shilovsky (pshilovsky@samba.org) 2012
+ *
+ */
+
+#ifndef _SMB2PDU_H
+#define _SMB2PDU_H
+
+#include <net/sock.h>
+#include "cifsacl.h"
+
+/* 52 transform hdr + 64 hdr + 88 create rsp */
+#define SMB2_TRANSFORM_HEADER_SIZE 52
+#define MAX_SMB2_HDR_SIZE 204
+
+/* The total header size for SMB2 read and write */
+#define SMB2_READWRITE_PDU_HEADER_SIZE (48 + sizeof(struct smb2_hdr))
+
+/* See MS-SMB2 2.2.43 */
+struct smb2_rdma_transform {
+	__le16 RdmaDescriptorOffset;
+	__le16 RdmaDescriptorLength;
+	__le32 Channel; /* for values see channel description in smb2 read above */
+	__le16 TransformCount;
+	__le16 Reserved1;
+	__le32 Reserved2;
+} __packed;
+
+/* TransformType */
+#define SMB2_RDMA_TRANSFORM_TYPE_ENCRYPTION	0x0001
+#define SMB2_RDMA_TRANSFORM_TYPE_SIGNING	0x0002
+
+struct smb2_rdma_crypto_transform {
+	__le16	TransformType;
+	__le16	SignatureLength;
+	__le16	NonceLength;
+	__u16	Reserved;
+	__u8	Signature[]; /* variable length */
+	/* u8 Nonce[] */
+	/* followed by padding */
+} __packed;
+
+/*
+ *	Definitions for SMB2 Protocol Data Units (network frames)
+ *
+ *  See MS-SMB2.PDF specification for protocol details.
+ *  The Naming convention is the lower case version of the SMB2
+ *  command code name for the struct. Note that structures must be packed.
+ *
+ */
+
+#define COMPOUND_FID 0xFFFFFFFFFFFFFFFFULL
+
+#define SMB2_SYMLINK_STRUCT_SIZE \
+	(sizeof(struct smb2_err_rsp) + sizeof(struct smb2_symlink_err_rsp))
+
+#define SYMLINK_ERROR_TAG 0x4c4d5953
+
+struct smb2_symlink_err_rsp {
+	__le32 SymLinkLength;
+	__le32 SymLinkErrorTag;
+	__le32 ReparseTag;
+	__le16 ReparseDataLength;
+	__le16 UnparsedPathLength;
+	__le16 SubstituteNameOffset;
+	__le16 SubstituteNameLength;
+	__le16 PrintNameOffset;
+	__le16 PrintNameLength;
+	__le32 Flags;
+	__u8  PathBuffer[];
+} __packed;
+
+/* SMB 3.1.1 and later dialects. See MS-SMB2 section 2.2.2.1 */
+struct smb2_error_context_rsp {
+	__le32 ErrorDataLength;
+	__le32 ErrorId;
+	__u8  ErrorContextData; /* ErrorDataLength long array */
+} __packed;
+
+/* ErrorId values */
+#define SMB2_ERROR_ID_DEFAULT		0x00000000
+#define SMB2_ERROR_ID_SHARE_REDIRECT	cpu_to_le32(0x72645253)	/* "rdRS" */
+
+/* Defines for Type field below (see MS-SMB2 2.2.2.2.2.1) */
+#define MOVE_DST_IPADDR_V4	cpu_to_le32(0x00000001)
+#define MOVE_DST_IPADDR_V6	cpu_to_le32(0x00000002)
+
+struct move_dst_ipaddr {
+	__le32 Type;
+	__u32  Reserved;
+	__u8   address[16]; /* IPv4 followed by 12 bytes rsvd or IPv6 address */
+} __packed;
+
+struct share_redirect_error_context_rsp {
+	__le32 StructureSize;
+	__le32 NotificationType;
+	__le32 ResourceNameOffset;
+	__le32 ResourceNameLength;
+	__le16 Reserved;
+	__le16 TargetType;
+	__le32 IPAddrCount;
+	struct move_dst_ipaddr IpAddrMoveList[];
+	/* __u8 ResourceName[] */ /* Name of share as counted Unicode string */
+} __packed;
+
+/*
+ * Maximum number of iovs we need for an open/create request.
+ * [0] : struct smb2_create_req
+ * [1] : path
+ * [2] : lease context
+ * [3] : durable context
+ * [4] : posix context
+ * [5] : time warp context
+ * [6] : query id context
+ * [7] : compound padding
+ */
+#define SMB2_CREATE_IOV_SIZE 8
+
+/*
+ * Maximum size of a SMB2_CREATE response is 64 (smb2 header) +
+ * 88 (fixed part of create response) + 520 (path) + 208 (contexts) +
+ * 2 bytes of padding.
+ */
+#define MAX_SMB2_CREATE_RESPONSE_SIZE 880
+
+#define SMB2_LEASE_READ_CACHING_HE	0x01
+#define SMB2_LEASE_HANDLE_CACHING_HE	0x02
+#define SMB2_LEASE_WRITE_CACHING_HE	0x04
+
+
+/* See MS-SMB2 2.2.13.2.11 */
+/* Flags */
+#define SMB2_DHANDLE_FLAG_PERSISTENT	0x00000002
+struct durable_context_v2 {
+	__le32 Timeout;
+	__le32 Flags;
+	__u64 Reserved;
+	__u8 CreateGuid[16];
+} __packed;
+
+struct create_durable_v2 {
+	struct create_context ccontext;
+	__u8   Name[8];
+	struct durable_context_v2 dcontext;
+} __packed;
+
+/* See MS-SMB2 2.2.13.2.12 */
+struct durable_reconnect_context_v2 {
+	struct {
+		__u64 PersistentFileId;
+		__u64 VolatileFileId;
+	} Fid;
+	__u8 CreateGuid[16];
+	__le32 Flags; /* see above DHANDLE_FLAG_PERSISTENT */
+} __packed;
+
+/* See MS-SMB2 2.2.14.2.12 */
+struct durable_reconnect_context_v2_rsp {
+	__le32 Timeout;
+	__le32 Flags; /* see above DHANDLE_FLAG_PERSISTENT */
+} __packed;
+
+struct create_durable_handle_reconnect_v2 {
+	struct create_context ccontext;
+	__u8   Name[8];
+	struct durable_reconnect_context_v2 dcontext;
+	__u8   Pad[4];
+} __packed;
+
+/* See MS-SMB2 2.2.13.2.5 */
+struct crt_twarp_ctxt {
+	struct create_context ccontext;
+	__u8	Name[8];
+	__le64	Timestamp;
+
+} __packed;
+
+/* See MS-SMB2 2.2.13.2.9 */
+struct crt_query_id_ctxt {
+	struct create_context ccontext;
+	__u8	Name[8];
+} __packed;
+
+struct crt_sd_ctxt {
+	struct create_context ccontext;
+	__u8	Name[8];
+	struct smb3_sd sd;
+} __packed;
+
+
+#define COPY_CHUNK_RES_KEY_SIZE	24
+struct resume_key_req {
+	char ResumeKey[COPY_CHUNK_RES_KEY_SIZE];
+	__le32	ContextLength;	/* MBZ */
+	char	Context[];	/* ignored, Windows sets to 4 bytes of zero */
+} __packed;
+
+/* this goes in the ioctl buffer when doing a copychunk request */
+struct copychunk_ioctl {
+	char SourceKey[COPY_CHUNK_RES_KEY_SIZE];
+	__le32 ChunkCount; /* we are only sending 1 */
+	__le32 Reserved;
+	/* array will only be one chunk long for us */
+	__le64 SourceOffset;
+	__le64 TargetOffset;
+	__le32 Length; /* how many bytes to copy */
+	__u32 Reserved2;
+} __packed;
+
+struct copychunk_ioctl_rsp {
+	__le32 ChunksWritten;
+	__le32 ChunkBytesWritten;
+	__le32 TotalBytesWritten;
+} __packed;
+
+/* See MS-FSCC 2.3.29 and 2.3.30 */
+struct get_retrieval_pointer_count_req {
+	__le64 StartingVcn; /* virtual cluster number (signed) */
+} __packed;
+
+struct get_retrieval_pointer_count_rsp {
+	__le32 ExtentCount;
+} __packed;
+
+/*
+ * See MS-FSCC 2.3.33 and 2.3.34
+ * request is the same as get_retrieval_point_count_req struct above
+ */
+struct smb3_extents {
+	__le64 NextVcn;
+	__le64 Lcn; /* logical cluster number */
+} __packed;
+
+struct get_retrieval_pointers_refcount_rsp {
+	__le32 ExtentCount;
+	__u32  Reserved;
+	__le64 StartingVcn;
+	struct smb3_extents extents[];
+} __packed;
+
+/* See MS-DFSC 2.2.2 */
+struct fsctl_get_dfs_referral_req {
+	__le16 MaxReferralLevel;
+	__u8 RequestFileName[];
+} __packed;
+
+/* DFS response is struct get_dfs_refer_rsp */
+
+/* See MS-SMB2 2.2.31.3 */
+struct network_resiliency_req {
+	__le32 Timeout;
+	__le32 Reserved;
+} __packed;
+/* There is no buffer for the response ie no struct network_resiliency_rsp */
+
+#define RSS_CAPABLE	cpu_to_le32(0x00000001)
+#define RDMA_CAPABLE	cpu_to_le32(0x00000002)
+
+#define INTERNETWORK	cpu_to_le16(0x0002)
+#define INTERNETWORKV6	cpu_to_le16(0x0017)
+
+struct network_interface_info_ioctl_rsp {
+	__le32 Next; /* next interface. zero if this is last one */
+	__le32 IfIndex;
+	__le32 Capability; /* RSS or RDMA Capable */
+	__le32 Reserved;
+	__le64 LinkSpeed;
+	__le16 Family;
+	__u8 Buffer[126];
+} __packed;
+
+struct iface_info_ipv4 {
+	__be16 Port;
+	__be32 IPv4Address;
+	__be64 Reserved;
+} __packed;
+
+struct iface_info_ipv6 {
+	__be16 Port;
+	__be32 FlowInfo;
+	__u8   IPv6Address[16];
+	__be32 ScopeId;
+} __packed;
+
+#define NO_FILE_ID 0xFFFFFFFFFFFFFFFFULL /* general ioctls to srv not to file */
+
+struct compress_ioctl {
+	__le16 CompressionState; /* See cifspdu.h for possible flag values */
+} __packed;
+
+/*
+ * Maximum number of iovs we need for an ioctl request.
+ * [0] : struct smb2_ioctl_req
+ * [1] : in_data
+ */
+#define SMB2_IOCTL_IOV_SIZE 2
+
+/*
+ *	PDU query infolevel structure definitions
+ *	BB consider moving to a different header
+ */
+
+struct smb2_file_full_ea_info { /* encoding of response for level 15 */
+	__le32 next_entry_offset;
+	__u8   flags;
+	__u8   ea_name_length;
+	__le16 ea_value_length;
+	char   ea_data[]; /* \0 terminated name plus value */
+} __packed; /* level 15 Set */
+
+struct smb2_file_reparse_point_info {
+	__le64 IndexNumber;
+	__le32 Tag;
+} __packed;
+
+struct smb2_file_network_open_info {
+	struct_group(network_open_info,
+		__le64 CreationTime;
+		__le64 LastAccessTime;
+		__le64 LastWriteTime;
+		__le64 ChangeTime;
+		__le64 AllocationSize;
+		__le64 EndOfFile;
+		__le32 Attributes;
+	);
+	__le32 Reserved;
+} __packed; /* level 34 Query also similar returned in close rsp and open rsp */
+
+/* See MS-FSCC 2.4.21 */
+struct smb2_file_id_information {
+	__le64	VolumeSerialNumber;
+	__u64  PersistentFileId; /* opaque endianness */
+	__u64  VolatileFileId; /* opaque endianness */
+} __packed; /* level 59 */
+
+/* See MS-FSCC 2.4.18 */
+struct smb2_file_id_extd_directory_info {
+	__le32 NextEntryOffset;
+	__u32 FileIndex;
+	__le64 CreationTime;
+	__le64 LastAccessTime;
+	__le64 LastWriteTime;
+	__le64 ChangeTime;
+	__le64 EndOfFile;
+	__le64 AllocationSize;
+	__le32 FileAttributes;
+	__le32 FileNameLength;
+	__le32 EaSize; /* EA size */
+	__le32 ReparsePointTag; /* valid if FILE_ATTR_REPARSE_POINT set in FileAttributes */
+	__le64 UniqueId; /* inode num - le since Samba puts ino in low 32 bit */
+	char FileName[];
+} __packed; /* level 60 */
+
+extern char smb2_padding[7];
+
+/* equivalent of the contents of SMB3.1.1 POSIX open context response */
+struct create_posix_rsp {
+	u32 nlink;
+	u32 reparse_tag;
+	u32 mode;
+	struct cifs_sid owner; /* var-sized on the wire */
+	struct cifs_sid group; /* var-sized on the wire */
+} __packed;
+
+#define SMB2_QUERY_DIRECTORY_IOV_SIZE 2
+
+/*
+ * SMB2-only POSIX info level for query dir
+ *
+ * See posix_info_sid_size(), posix_info_extra_size() and
+ * posix_info_parse() to help with the handling of this struct.
+ */
+struct smb2_posix_info {
+	__le32 NextEntryOffset;
+	__u32 Ignored;
+	__le64 CreationTime;
+	__le64 LastAccessTime;
+	__le64 LastWriteTime;
+	__le64 ChangeTime;
+	__le64 EndOfFile;
+	__le64 AllocationSize;
+	__le32 DosAttributes;
+	__le64 Inode;
+	__le32 DeviceId;
+	__le32 Zero;
+	/* beginning of POSIX Create Context Response */
+	__le32 HardLinks;
+	__le32 ReparseTag;
+	__le32 Mode;
+	/*
+	 * var sized owner SID
+	 * var sized group SID
+	 * le32 filenamelength
+	 * u8  filename[]
+	 */
+} __packed;
+
+/*
+ * Parsed version of the above struct. Allows direct access to the
+ * variable length fields
+ */
+struct smb2_posix_info_parsed {
+	const struct smb2_posix_info *base;
+	size_t size;
+	struct cifs_sid owner;
+	struct cifs_sid group;
+	int name_len;
+	const u8 *name;
+};
+
+#endif				/* _SMB2PDU_H */
diff --git a/fs/smb/client/smb2proto.h b/fs/smb/client/smb2proto.h
new file mode 100644
index 0000000000..0e371f7e28
--- /dev/null
+++ b/fs/smb/client/smb2proto.h
@@ -0,0 +1,292 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+/*
+ *
+ *   Copyright (c) International Business Machines  Corp., 2002, 2011
+ *                 Etersoft, 2012
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *              Pavel Shilovsky (pshilovsky@samba.org) 2012
+ *
+ */
+#ifndef _SMB2PROTO_H
+#define _SMB2PROTO_H
+#include <linux/nls.h>
+#include <linux/key-type.h>
+
+struct statfs;
+struct smb_rqst;
+
+/*
+ *****************************************************************
+ * All Prototypes
+ *****************************************************************
+ */
+extern int map_smb2_to_linux_error(char *buf, bool log_err);
+extern int smb2_check_message(char *buf, unsigned int length,
+			      struct TCP_Server_Info *server);
+extern unsigned int smb2_calc_size(void *buf);
+extern char *smb2_get_data_area_len(int *off, int *len,
+				    struct smb2_hdr *shdr);
+extern __le16 *cifs_convert_path_to_utf16(const char *from,
+					  struct cifs_sb_info *cifs_sb);
+
+extern int smb2_verify_signature(struct smb_rqst *, struct TCP_Server_Info *);
+extern int smb2_check_receive(struct mid_q_entry *mid,
+			      struct TCP_Server_Info *server, bool log_error);
+extern struct mid_q_entry *smb2_setup_request(struct cifs_ses *ses,
+					      struct TCP_Server_Info *,
+					      struct smb_rqst *rqst);
+extern struct mid_q_entry *smb2_setup_async_request(
+			struct TCP_Server_Info *server, struct smb_rqst *rqst);
+extern struct cifs_ses *smb2_find_smb_ses(struct TCP_Server_Info *server,
+					   __u64 ses_id);
+extern struct cifs_tcon *smb2_find_smb_tcon(struct TCP_Server_Info *server,
+						__u64 ses_id, __u32  tid);
+extern int smb2_calc_signature(struct smb_rqst *rqst,
+				struct TCP_Server_Info *server,
+				bool allocate_crypto);
+extern int smb3_calc_signature(struct smb_rqst *rqst,
+				struct TCP_Server_Info *server,
+				bool allocate_crypto);
+extern void smb2_echo_request(struct work_struct *work);
+extern __le32 smb2_get_lease_state(struct cifsInodeInfo *cinode);
+extern bool smb2_is_valid_oplock_break(char *buffer,
+				       struct TCP_Server_Info *srv);
+extern int smb3_handle_read_data(struct TCP_Server_Info *server,
+				 struct mid_q_entry *mid);
+extern int smb2_query_reparse_tag(const unsigned int xid, struct cifs_tcon *tcon,
+				struct cifs_sb_info *cifs_sb, const char *path,
+				__u32 *reparse_tag);
+int smb2_query_path_info(const unsigned int xid,
+			 struct cifs_tcon *tcon,
+			 struct cifs_sb_info *cifs_sb,
+			 const char *full_path,
+			 struct cifs_open_info_data *data);
+extern int smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
+			      const char *full_path, __u64 size,
+			      struct cifs_sb_info *cifs_sb, bool set_alloc);
+extern int smb2_set_file_info(struct inode *inode, const char *full_path,
+			      FILE_BASIC_INFO *buf, const unsigned int xid);
+extern int smb311_posix_mkdir(const unsigned int xid, struct inode *inode,
+			       umode_t mode, struct cifs_tcon *tcon,
+			       const char *full_path,
+			       struct cifs_sb_info *cifs_sb);
+extern int smb2_mkdir(const unsigned int xid, struct inode *inode,
+		      umode_t mode, struct cifs_tcon *tcon,
+		      const char *name, struct cifs_sb_info *cifs_sb);
+extern void smb2_mkdir_setinfo(struct inode *inode, const char *full_path,
+			       struct cifs_sb_info *cifs_sb,
+			       struct cifs_tcon *tcon, const unsigned int xid);
+extern int smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon,
+		      const char *name, struct cifs_sb_info *cifs_sb);
+extern int smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon,
+		       const char *name, struct cifs_sb_info *cifs_sb);
+extern int smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
+			    const char *from_name, const char *to_name,
+			    struct cifs_sb_info *cifs_sb);
+extern int smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
+				const char *from_name, const char *to_name,
+				struct cifs_sb_info *cifs_sb);
+extern int smb3_create_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
+			struct cifs_sb_info *cifs_sb, const unsigned char *path,
+			char *pbuf, unsigned int *pbytes_written);
+extern int smb3_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
+			  struct cifs_sb_info *cifs_sb,
+			  const unsigned char *path, char *pbuf,
+			  unsigned int *pbytes_read);
+int smb2_parse_symlink_response(struct cifs_sb_info *cifs_sb, const struct kvec *iov, char **path);
+int smb2_open_file(const unsigned int xid, struct cifs_open_parms *oparms, __u32 *oplock,
+		   void *buf);
+extern int smb2_unlock_range(struct cifsFileInfo *cfile,
+			     struct file_lock *flock, const unsigned int xid);
+extern int smb2_push_mandatory_locks(struct cifsFileInfo *cfile);
+extern void smb2_reconnect_server(struct work_struct *work);
+extern int smb3_crypto_aead_allocate(struct TCP_Server_Info *server);
+extern unsigned long smb_rqst_len(struct TCP_Server_Info *server,
+				  struct smb_rqst *rqst);
+extern void smb2_set_next_command(struct cifs_tcon *tcon,
+				  struct smb_rqst *rqst);
+extern void smb2_set_related(struct smb_rqst *rqst);
+
+/*
+ * SMB2 Worker functions - most of protocol specific implementation details
+ * are contained within these calls.
+ */
+extern int SMB2_negotiate(const unsigned int xid,
+			  struct cifs_ses *ses,
+			  struct TCP_Server_Info *server);
+extern int SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
+			   struct TCP_Server_Info *server,
+			   const struct nls_table *nls_cp);
+extern int SMB2_logoff(const unsigned int xid, struct cifs_ses *ses);
+extern int SMB2_tcon(const unsigned int xid, struct cifs_ses *ses,
+		     const char *tree, struct cifs_tcon *tcon,
+		     const struct nls_table *);
+extern int SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon);
+extern int SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms,
+		     __le16 *path, __u8 *oplock,
+		     struct smb2_file_all_info *buf,
+		     struct create_posix_rsp *posix,
+		     struct kvec *err_iov, int *resp_buftype);
+extern int SMB2_open_init(struct cifs_tcon *tcon,
+			  struct TCP_Server_Info *server,
+			  struct smb_rqst *rqst,
+			  __u8 *oplock, struct cifs_open_parms *oparms,
+			  __le16 *path);
+extern void SMB2_open_free(struct smb_rqst *rqst);
+extern int SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon,
+		     u64 persistent_fid, u64 volatile_fid, u32 opcode,
+		     char *in_data, u32 indatalen, u32 maxoutlen,
+		     char **out_data, u32 *plen /* returned data len */);
+extern int SMB2_ioctl_init(struct cifs_tcon *tcon,
+			   struct TCP_Server_Info *server,
+			   struct smb_rqst *rqst,
+			   u64 persistent_fid, u64 volatile_fid, u32 opcode,
+			   char *in_data, u32 indatalen,
+			   __u32 max_response_size);
+extern void SMB2_ioctl_free(struct smb_rqst *rqst);
+extern int SMB2_change_notify(const unsigned int xid, struct cifs_tcon *tcon,
+			u64 persistent_fid, u64 volatile_fid, bool watch_tree,
+			u32 completion_filter, u32 max_out_data_len,
+			char **out_data, u32 *plen /* returned data len */);
+
+extern int __SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
+			u64 persistent_fid, u64 volatile_fid,
+			struct smb2_file_network_open_info *pbuf);
+extern int SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
+		      u64 persistent_file_id, u64 volatile_file_id);
+extern int SMB2_close_init(struct cifs_tcon *tcon,
+			   struct TCP_Server_Info *server,
+			   struct smb_rqst *rqst,
+			   u64 persistent_fid, u64 volatile_fid,
+			   bool query_attrs);
+extern void SMB2_close_free(struct smb_rqst *rqst);
+extern int SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon,
+		      u64 persistent_file_id, u64 volatile_file_id);
+extern int SMB2_flush_init(const unsigned int xid, struct smb_rqst *rqst,
+			   struct cifs_tcon *tcon,
+			   struct TCP_Server_Info *server,
+			   u64 persistent_file_id, u64 volatile_file_id);
+extern void SMB2_flush_free(struct smb_rqst *rqst);
+extern int SMB311_posix_query_info(const unsigned int xid, struct cifs_tcon *tcon,
+		u64 persistent_fid, u64 volatile_fid, struct smb311_posix_qinfo *data, u32 *plen);
+extern int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
+			   u64 persistent_file_id, u64 volatile_file_id,
+			   struct smb2_file_all_info *data);
+extern int SMB2_query_info_init(struct cifs_tcon *tcon,
+				struct TCP_Server_Info *server,
+				struct smb_rqst *rqst,
+				u64 persistent_fid, u64 volatile_fid,
+				u8 info_class, u8 info_type,
+				u32 additional_info, size_t output_len,
+				size_t input_len, void *input);
+extern void SMB2_query_info_free(struct smb_rqst *rqst);
+extern int SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon,
+			  u64 persistent_file_id, u64 volatile_file_id,
+			  void **data, unsigned int *plen, u32 info);
+extern int SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
+			    u64 persistent_fid, u64 volatile_fid,
+			    __le64 *uniqueid);
+extern int smb2_async_readv(struct cifs_readdata *rdata);
+extern int SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
+		     unsigned int *nbytes, char **buf, int *buf_type);
+extern int smb2_async_writev(struct cifs_writedata *wdata,
+			     void (*release)(struct kref *kref));
+extern int SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
+		      unsigned int *nbytes, struct kvec *iov, int n_vec);
+extern int SMB2_echo(struct TCP_Server_Info *server);
+extern int SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
+				u64 persistent_fid, u64 volatile_fid, int index,
+				struct cifs_search_info *srch_inf);
+extern int SMB2_query_directory_init(unsigned int xid, struct cifs_tcon *tcon,
+				     struct TCP_Server_Info *server,
+				     struct smb_rqst *rqst,
+				     u64 persistent_fid, u64 volatile_fid,
+				     int index, int info_level);
+extern void SMB2_query_directory_free(struct smb_rqst *rqst);
+extern int SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon,
+			u64 persistent_fid, u64 volatile_fid, u32 pid,
+			__le64 *eof);
+extern int SMB2_set_info_init(struct cifs_tcon *tcon,
+			      struct TCP_Server_Info *server,
+			      struct smb_rqst *rqst,
+			      u64 persistent_fid, u64 volatile_fid, u32 pid,
+			      u8 info_class, u8 info_type, u32 additional_info,
+			      void **data, unsigned int *size);
+extern void SMB2_set_info_free(struct smb_rqst *rqst);
+extern int SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
+			u64 persistent_fid, u64 volatile_fid,
+			struct cifs_ntsd *pnntsd, int pacllen, int aclflag);
+extern int SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
+		       u64 persistent_fid, u64 volatile_fid,
+		       struct smb2_file_full_ea_info *buf, int len);
+extern int SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
+				u64 persistent_fid, u64 volatile_fid);
+extern int SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
+			     const u64 persistent_fid, const u64 volatile_fid,
+			     const __u8 oplock_level);
+extern int smb2_handle_cancelled_close(struct cifs_tcon *tcon,
+				       __u64 persistent_fid,
+				       __u64 volatile_fid);
+extern int smb2_handle_cancelled_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server);
+void smb2_cancelled_close_fid(struct work_struct *work);
+extern int SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
+			 u64 persistent_file_id, u64 volatile_file_id,
+			 struct kstatfs *FSData);
+extern int SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon,
+			 u64 persistent_file_id, u64 volatile_file_id,
+			 struct kstatfs *FSData);
+extern int SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
+			 u64 persistent_file_id, u64 volatile_file_id, int lvl);
+extern int SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
+		     const __u64 persist_fid, const __u64 volatile_fid,
+		     const __u32 pid, const __u64 length, const __u64 offset,
+		     const __u32 lockFlags, const bool wait);
+extern int smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
+		      const __u64 persist_fid, const __u64 volatile_fid,
+		      const __u32 pid, const __u32 num_lock,
+		      struct smb2_lock_element *buf);
+extern int SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
+			    __u8 *lease_key, const __le32 lease_state);
+extern int smb3_validate_negotiate(const unsigned int, struct cifs_tcon *);
+
+extern enum securityEnum smb2_select_sectype(struct TCP_Server_Info *,
+					enum securityEnum);
+int smb2_parse_contexts(struct TCP_Server_Info *server,
+			struct kvec *rsp_iov,
+			unsigned int *epoch,
+			char *lease_key, __u8 *oplock,
+			struct smb2_file_all_info *buf,
+			struct create_posix_rsp *posix);
+
+extern int smb3_encryption_required(const struct cifs_tcon *tcon);
+extern int smb2_validate_iov(unsigned int offset, unsigned int buffer_length,
+			     struct kvec *iov, unsigned int min_buf_size);
+extern int smb2_validate_and_copy_iov(unsigned int offset,
+				      unsigned int buffer_length,
+				      struct kvec *iov,
+				      unsigned int minbufsize, char *data);
+extern void smb2_copy_fs_info_to_kstatfs(
+	 struct smb2_fs_full_size_info *pfs_inf,
+	 struct kstatfs *kst);
+extern int smb311_crypto_shash_allocate(struct TCP_Server_Info *server);
+extern int smb311_update_preauth_hash(struct cifs_ses *ses,
+				      struct TCP_Server_Info *server,
+				      struct kvec *iov, int nvec);
+extern int smb2_query_info_compound(const unsigned int xid,
+				    struct cifs_tcon *tcon,
+				    const char *path, u32 desired_access,
+				    u32 class, u32 type, u32 output_len,
+				    struct kvec *rsp, int *buftype,
+				    struct cifs_sb_info *cifs_sb);
+/* query path info from the server using SMB311 POSIX extensions*/
+int smb311_posix_query_path_info(const unsigned int xid,
+				 struct cifs_tcon *tcon,
+				 struct cifs_sb_info *cifs_sb,
+				 const char *full_path,
+				 struct cifs_open_info_data *data,
+				 struct cifs_sid *owner,
+				 struct cifs_sid *group);
+int posix_info_parse(const void *beg, const void *end,
+		     struct smb2_posix_info_parsed *out);
+int posix_info_sid_size(const void *beg, const void *end);
+#endif			/* _SMB2PROTO_H */
diff --git a/fs/smb/client/smb2status.h b/fs/smb/client/smb2status.h
new file mode 100644
index 0000000000..a9e958166f
--- /dev/null
+++ b/fs/smb/client/smb2status.h
@@ -0,0 +1,1769 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+/*
+ *
+ *   SMB2 Status code (network error) definitions
+ *   Definitions are from MS-ERREF
+ *
+ *   Copyright (c) International Business Machines  Corp., 2009,2011
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ */
+
+/*
+ *  0 1 2 3 4 5 6 7 8 9 0 A B C D E F 0 1 2 3 4 5 6 7 8 9 A B C D E F
+ *  SEV C N <-------Facility--------> <------Error Status Code------>
+ *
+ *  C is set if "customer defined" error, N bit is reserved and MBZ
+ */
+
+#define STATUS_SEVERITY_SUCCESS __constant_cpu_to_le32(0x0000)
+#define STATUS_SEVERITY_INFORMATIONAL cpu_to_le32(0x0001)
+#define STATUS_SEVERITY_WARNING cpu_to_le32(0x0002)
+#define STATUS_SEVERITY_ERROR cpu_to_le32(0x0003)
+
+struct ntstatus {
+	/* Facility is the high 12 bits of the following field */
+	__le32 Facility; /* low 2 bits Severity, next is Customer, then rsrvd */
+	__le32 Code;
+};
+
+#define STATUS_SUCCESS cpu_to_le32(0x00000000)
+#define STATUS_WAIT_0 cpu_to_le32(0x00000000)
+#define STATUS_WAIT_1 cpu_to_le32(0x00000001)
+#define STATUS_WAIT_2 cpu_to_le32(0x00000002)
+#define STATUS_WAIT_3 cpu_to_le32(0x00000003)
+#define STATUS_WAIT_63 cpu_to_le32(0x0000003F)
+#define STATUS_ABANDONED cpu_to_le32(0x00000080)
+#define STATUS_ABANDONED_WAIT_0 cpu_to_le32(0x00000080)
+#define STATUS_ABANDONED_WAIT_63 cpu_to_le32(0x000000BF)
+#define STATUS_USER_APC cpu_to_le32(0x000000C0)
+#define STATUS_KERNEL_APC cpu_to_le32(0x00000100)
+#define STATUS_ALERTED cpu_to_le32(0x00000101)
+#define STATUS_TIMEOUT cpu_to_le32(0x00000102)
+#define STATUS_PENDING cpu_to_le32(0x00000103)
+#define STATUS_REPARSE cpu_to_le32(0x00000104)
+#define STATUS_MORE_ENTRIES cpu_to_le32(0x00000105)
+#define STATUS_NOT_ALL_ASSIGNED cpu_to_le32(0x00000106)
+#define STATUS_SOME_NOT_MAPPED cpu_to_le32(0x00000107)
+#define STATUS_OPLOCK_BREAK_IN_PROGRESS cpu_to_le32(0x00000108)
+#define STATUS_VOLUME_MOUNTED cpu_to_le32(0x00000109)
+#define STATUS_RXACT_COMMITTED cpu_to_le32(0x0000010A)
+#define STATUS_NOTIFY_CLEANUP cpu_to_le32(0x0000010B)
+#define STATUS_NOTIFY_ENUM_DIR cpu_to_le32(0x0000010C)
+#define STATUS_NO_QUOTAS_FOR_ACCOUNT cpu_to_le32(0x0000010D)
+#define STATUS_PRIMARY_TRANSPORT_CONNECT_FAILED cpu_to_le32(0x0000010E)
+#define STATUS_PAGE_FAULT_TRANSITION cpu_to_le32(0x00000110)
+#define STATUS_PAGE_FAULT_DEMAND_ZERO cpu_to_le32(0x00000111)
+#define STATUS_PAGE_FAULT_COPY_ON_WRITE cpu_to_le32(0x00000112)
+#define STATUS_PAGE_FAULT_GUARD_PAGE cpu_to_le32(0x00000113)
+#define STATUS_PAGE_FAULT_PAGING_FILE cpu_to_le32(0x00000114)
+#define STATUS_CACHE_PAGE_LOCKED cpu_to_le32(0x00000115)
+#define STATUS_CRASH_DUMP cpu_to_le32(0x00000116)
+#define STATUS_BUFFER_ALL_ZEROS cpu_to_le32(0x00000117)
+#define STATUS_REPARSE_OBJECT cpu_to_le32(0x00000118)
+#define STATUS_RESOURCE_REQUIREMENTS_CHANGED cpu_to_le32(0x00000119)
+#define STATUS_TRANSLATION_COMPLETE cpu_to_le32(0x00000120)
+#define STATUS_DS_MEMBERSHIP_EVALUATED_LOCALLY cpu_to_le32(0x00000121)
+#define STATUS_NOTHING_TO_TERMINATE cpu_to_le32(0x00000122)
+#define STATUS_PROCESS_NOT_IN_JOB cpu_to_le32(0x00000123)
+#define STATUS_PROCESS_IN_JOB cpu_to_le32(0x00000124)
+#define STATUS_VOLSNAP_HIBERNATE_READY cpu_to_le32(0x00000125)
+#define STATUS_FSFILTER_OP_COMPLETED_SUCCESSFULLY cpu_to_le32(0x00000126)
+#define STATUS_INTERRUPT_VECTOR_ALREADY_CONNECTED cpu_to_le32(0x00000127)
+#define STATUS_INTERRUPT_STILL_CONNECTED cpu_to_le32(0x00000128)
+#define STATUS_PROCESS_CLONED cpu_to_le32(0x00000129)
+#define STATUS_FILE_LOCKED_WITH_ONLY_READERS cpu_to_le32(0x0000012A)
+#define STATUS_FILE_LOCKED_WITH_WRITERS cpu_to_le32(0x0000012B)
+#define STATUS_RESOURCEMANAGER_READ_ONLY cpu_to_le32(0x00000202)
+#define STATUS_WAIT_FOR_OPLOCK cpu_to_le32(0x00000367)
+#define DBG_EXCEPTION_HANDLED cpu_to_le32(0x00010001)
+#define DBG_CONTINUE cpu_to_le32(0x00010002)
+#define STATUS_FLT_IO_COMPLETE cpu_to_le32(0x001C0001)
+#define STATUS_OBJECT_NAME_EXISTS cpu_to_le32(0x40000000)
+#define STATUS_THREAD_WAS_SUSPENDED cpu_to_le32(0x40000001)
+#define STATUS_WORKING_SET_LIMIT_RANGE cpu_to_le32(0x40000002)
+#define STATUS_IMAGE_NOT_AT_BASE cpu_to_le32(0x40000003)
+#define STATUS_RXACT_STATE_CREATED cpu_to_le32(0x40000004)
+#define STATUS_SEGMENT_NOTIFICATION cpu_to_le32(0x40000005)
+#define STATUS_LOCAL_USER_SESSION_KEY cpu_to_le32(0x40000006)
+#define STATUS_BAD_CURRENT_DIRECTORY cpu_to_le32(0x40000007)
+#define STATUS_SERIAL_MORE_WRITES cpu_to_le32(0x40000008)
+#define STATUS_REGISTRY_RECOVERED cpu_to_le32(0x40000009)
+#define STATUS_FT_READ_RECOVERY_FROM_BACKUP cpu_to_le32(0x4000000A)
+#define STATUS_FT_WRITE_RECOVERY cpu_to_le32(0x4000000B)
+#define STATUS_SERIAL_COUNTER_TIMEOUT cpu_to_le32(0x4000000C)
+#define STATUS_NULL_LM_PASSWORD cpu_to_le32(0x4000000D)
+#define STATUS_IMAGE_MACHINE_TYPE_MISMATCH cpu_to_le32(0x4000000E)
+#define STATUS_RECEIVE_PARTIAL cpu_to_le32(0x4000000F)
+#define STATUS_RECEIVE_EXPEDITED cpu_to_le32(0x40000010)
+#define STATUS_RECEIVE_PARTIAL_EXPEDITED cpu_to_le32(0x40000011)
+#define STATUS_EVENT_DONE cpu_to_le32(0x40000012)
+#define STATUS_EVENT_PENDING cpu_to_le32(0x40000013)
+#define STATUS_CHECKING_FILE_SYSTEM cpu_to_le32(0x40000014)
+#define STATUS_FATAL_APP_EXIT cpu_to_le32(0x40000015)
+#define STATUS_PREDEFINED_HANDLE cpu_to_le32(0x40000016)
+#define STATUS_WAS_UNLOCKED cpu_to_le32(0x40000017)
+#define STATUS_SERVICE_NOTIFICATION cpu_to_le32(0x40000018)
+#define STATUS_WAS_LOCKED cpu_to_le32(0x40000019)
+#define STATUS_LOG_HARD_ERROR cpu_to_le32(0x4000001A)
+#define STATUS_ALREADY_WIN32 cpu_to_le32(0x4000001B)
+#define STATUS_WX86_UNSIMULATE cpu_to_le32(0x4000001C)
+#define STATUS_WX86_CONTINUE cpu_to_le32(0x4000001D)
+#define STATUS_WX86_SINGLE_STEP cpu_to_le32(0x4000001E)
+#define STATUS_WX86_BREAKPOINT cpu_to_le32(0x4000001F)
+#define STATUS_WX86_EXCEPTION_CONTINUE cpu_to_le32(0x40000020)
+#define STATUS_WX86_EXCEPTION_LASTCHANCE cpu_to_le32(0x40000021)
+#define STATUS_WX86_EXCEPTION_CHAIN cpu_to_le32(0x40000022)
+#define STATUS_IMAGE_MACHINE_TYPE_MISMATCH_EXE cpu_to_le32(0x40000023)
+#define STATUS_NO_YIELD_PERFORMED cpu_to_le32(0x40000024)
+#define STATUS_TIMER_RESUME_IGNORED cpu_to_le32(0x40000025)
+#define STATUS_ARBITRATION_UNHANDLED cpu_to_le32(0x40000026)
+#define STATUS_CARDBUS_NOT_SUPPORTED cpu_to_le32(0x40000027)
+#define STATUS_WX86_CREATEWX86TIB cpu_to_le32(0x40000028)
+#define STATUS_MP_PROCESSOR_MISMATCH cpu_to_le32(0x40000029)
+#define STATUS_HIBERNATED cpu_to_le32(0x4000002A)
+#define STATUS_RESUME_HIBERNATION cpu_to_le32(0x4000002B)
+#define STATUS_FIRMWARE_UPDATED cpu_to_le32(0x4000002C)
+#define STATUS_DRIVERS_LEAKING_LOCKED_PAGES cpu_to_le32(0x4000002D)
+#define STATUS_MESSAGE_RETRIEVED cpu_to_le32(0x4000002E)
+#define STATUS_SYSTEM_POWERSTATE_TRANSITION cpu_to_le32(0x4000002F)
+#define STATUS_ALPC_CHECK_COMPLETION_LIST cpu_to_le32(0x40000030)
+#define STATUS_SYSTEM_POWERSTATE_COMPLEX_TRANSITION cpu_to_le32(0x40000031)
+#define STATUS_ACCESS_AUDIT_BY_POLICY cpu_to_le32(0x40000032)
+#define STATUS_ABANDON_HIBERFILE cpu_to_le32(0x40000033)
+#define STATUS_BIZRULES_NOT_ENABLED cpu_to_le32(0x40000034)
+#define STATUS_WAKE_SYSTEM cpu_to_le32(0x40000294)
+#define STATUS_DS_SHUTTING_DOWN cpu_to_le32(0x40000370)
+#define DBG_REPLY_LATER cpu_to_le32(0x40010001)
+#define DBG_UNABLE_TO_PROVIDE_HANDLE cpu_to_le32(0x40010002)
+#define DBG_TERMINATE_THREAD cpu_to_le32(0x40010003)
+#define DBG_TERMINATE_PROCESS cpu_to_le32(0x40010004)
+#define DBG_CONTROL_C cpu_to_le32(0x40010005)
+#define DBG_PRINTEXCEPTION_C cpu_to_le32(0x40010006)
+#define DBG_RIPEXCEPTION cpu_to_le32(0x40010007)
+#define DBG_CONTROL_BREAK cpu_to_le32(0x40010008)
+#define DBG_COMMAND_EXCEPTION cpu_to_le32(0x40010009)
+#define RPC_NT_UUID_LOCAL_ONLY cpu_to_le32(0x40020056)
+#define RPC_NT_SEND_INCOMPLETE cpu_to_le32(0x400200AF)
+#define STATUS_CTX_CDM_CONNECT cpu_to_le32(0x400A0004)
+#define STATUS_CTX_CDM_DISCONNECT cpu_to_le32(0x400A0005)
+#define STATUS_SXS_RELEASE_ACTIVATION_CONTEXT cpu_to_le32(0x4015000D)
+#define STATUS_RECOVERY_NOT_NEEDED cpu_to_le32(0x40190034)
+#define STATUS_RM_ALREADY_STARTED cpu_to_le32(0x40190035)
+#define STATUS_LOG_NO_RESTART cpu_to_le32(0x401A000C)
+#define STATUS_VIDEO_DRIVER_DEBUG_REPORT_REQUEST cpu_to_le32(0x401B00EC)
+#define STATUS_GRAPHICS_PARTIAL_DATA_POPULATED cpu_to_le32(0x401E000A)
+#define STATUS_GRAPHICS_DRIVER_MISMATCH cpu_to_le32(0x401E0117)
+#define STATUS_GRAPHICS_MODE_NOT_PINNED cpu_to_le32(0x401E0307)
+#define STATUS_GRAPHICS_NO_PREFERRED_MODE cpu_to_le32(0x401E031E)
+#define STATUS_GRAPHICS_DATASET_IS_EMPTY cpu_to_le32(0x401E034B)
+#define STATUS_GRAPHICS_NO_MORE_ELEMENTS_IN_DATASET cpu_to_le32(0x401E034C)
+#define STATUS_GRAPHICS_PATH_CONTENT_GEOMETRY_TRANSFORMATION_NOT_PINNED cpu_to_le32(0x401E0351)
+#define STATUS_GRAPHICS_UNKNOWN_CHILD_STATUS cpu_to_le32(0x401E042F)
+#define STATUS_GRAPHICS_LEADLINK_START_DEFERRED cpu_to_le32(0x401E0437)
+#define STATUS_GRAPHICS_POLLING_TOO_FREQUENTLY cpu_to_le32(0x401E0439)
+#define STATUS_GRAPHICS_START_DEFERRED cpu_to_le32(0x401E043A)
+#define STATUS_NDIS_INDICATION_REQUIRED cpu_to_le32(0x40230001)
+#define STATUS_GUARD_PAGE_VIOLATION cpu_to_le32(0x80000001)
+#define STATUS_DATATYPE_MISALIGNMENT cpu_to_le32(0x80000002)
+#define STATUS_BREAKPOINT cpu_to_le32(0x80000003)
+#define STATUS_SINGLE_STEP cpu_to_le32(0x80000004)
+#define STATUS_BUFFER_OVERFLOW cpu_to_le32(0x80000005)
+#define STATUS_NO_MORE_FILES cpu_to_le32(0x80000006)
+#define STATUS_WAKE_SYSTEM_DEBUGGER cpu_to_le32(0x80000007)
+#define STATUS_HANDLES_CLOSED cpu_to_le32(0x8000000A)
+#define STATUS_NO_INHERITANCE cpu_to_le32(0x8000000B)
+#define STATUS_GUID_SUBSTITUTION_MADE cpu_to_le32(0x8000000C)
+#define STATUS_PARTIAL_COPY cpu_to_le32(0x8000000D)
+#define STATUS_DEVICE_PAPER_EMPTY cpu_to_le32(0x8000000E)
+#define STATUS_DEVICE_POWERED_OFF cpu_to_le32(0x8000000F)
+#define STATUS_DEVICE_OFF_LINE cpu_to_le32(0x80000010)
+#define STATUS_DEVICE_BUSY cpu_to_le32(0x80000011)
+#define STATUS_NO_MORE_EAS cpu_to_le32(0x80000012)
+#define STATUS_INVALID_EA_NAME cpu_to_le32(0x80000013)
+#define STATUS_EA_LIST_INCONSISTENT cpu_to_le32(0x80000014)
+#define STATUS_INVALID_EA_FLAG cpu_to_le32(0x80000015)
+#define STATUS_VERIFY_REQUIRED cpu_to_le32(0x80000016)
+#define STATUS_EXTRANEOUS_INFORMATION cpu_to_le32(0x80000017)
+#define STATUS_RXACT_COMMIT_NECESSARY cpu_to_le32(0x80000018)
+#define STATUS_NO_MORE_ENTRIES cpu_to_le32(0x8000001A)
+#define STATUS_FILEMARK_DETECTED cpu_to_le32(0x8000001B)
+#define STATUS_MEDIA_CHANGED cpu_to_le32(0x8000001C)
+#define STATUS_BUS_RESET cpu_to_le32(0x8000001D)
+#define STATUS_END_OF_MEDIA cpu_to_le32(0x8000001E)
+#define STATUS_BEGINNING_OF_MEDIA cpu_to_le32(0x8000001F)
+#define STATUS_MEDIA_CHECK cpu_to_le32(0x80000020)
+#define STATUS_SETMARK_DETECTED cpu_to_le32(0x80000021)
+#define STATUS_NO_DATA_DETECTED cpu_to_le32(0x80000022)
+#define STATUS_REDIRECTOR_HAS_OPEN_HANDLES cpu_to_le32(0x80000023)
+#define STATUS_SERVER_HAS_OPEN_HANDLES cpu_to_le32(0x80000024)
+#define STATUS_ALREADY_DISCONNECTED cpu_to_le32(0x80000025)
+#define STATUS_LONGJUMP cpu_to_le32(0x80000026)
+#define STATUS_CLEANER_CARTRIDGE_INSTALLED cpu_to_le32(0x80000027)
+#define STATUS_PLUGPLAY_QUERY_VETOED cpu_to_le32(0x80000028)
+#define STATUS_UNWIND_CONSOLIDATE cpu_to_le32(0x80000029)
+#define STATUS_REGISTRY_HIVE_RECOVERED cpu_to_le32(0x8000002A)
+#define STATUS_DLL_MIGHT_BE_INSECURE cpu_to_le32(0x8000002B)
+#define STATUS_DLL_MIGHT_BE_INCOMPATIBLE cpu_to_le32(0x8000002C)
+#define STATUS_STOPPED_ON_SYMLINK cpu_to_le32(0x8000002D)
+#define STATUS_DEVICE_REQUIRES_CLEANING cpu_to_le32(0x80000288)
+#define STATUS_DEVICE_DOOR_OPEN cpu_to_le32(0x80000289)
+#define STATUS_DATA_LOST_REPAIR cpu_to_le32(0x80000803)
+#define DBG_EXCEPTION_NOT_HANDLED cpu_to_le32(0x80010001)
+#define STATUS_CLUSTER_NODE_ALREADY_UP cpu_to_le32(0x80130001)
+#define STATUS_CLUSTER_NODE_ALREADY_DOWN cpu_to_le32(0x80130002)
+#define STATUS_CLUSTER_NETWORK_ALREADY_ONLINE cpu_to_le32(0x80130003)
+#define STATUS_CLUSTER_NETWORK_ALREADY_OFFLINE cpu_to_le32(0x80130004)
+#define STATUS_CLUSTER_NODE_ALREADY_MEMBER cpu_to_le32(0x80130005)
+#define STATUS_COULD_NOT_RESIZE_LOG cpu_to_le32(0x80190009)
+#define STATUS_NO_TXF_METADATA cpu_to_le32(0x80190029)
+#define STATUS_CANT_RECOVER_WITH_HANDLE_OPEN cpu_to_le32(0x80190031)
+#define STATUS_TXF_METADATA_ALREADY_PRESENT cpu_to_le32(0x80190041)
+#define STATUS_TRANSACTION_SCOPE_CALLBACKS_NOT_SET cpu_to_le32(0x80190042)
+#define STATUS_VIDEO_HUNG_DISPLAY_DRIVER_THREAD_RECOVERED cpu_to_le32(0x801B00EB)
+#define STATUS_FLT_BUFFER_TOO_SMALL cpu_to_le32(0x801C0001)
+#define STATUS_FVE_PARTIAL_METADATA cpu_to_le32(0x80210001)
+#define STATUS_UNSUCCESSFUL cpu_to_le32(0xC0000001)
+#define STATUS_NOT_IMPLEMENTED cpu_to_le32(0xC0000002)
+#define STATUS_INVALID_INFO_CLASS cpu_to_le32(0xC0000003)
+#define STATUS_INFO_LENGTH_MISMATCH cpu_to_le32(0xC0000004)
+#define STATUS_ACCESS_VIOLATION cpu_to_le32(0xC0000005)
+#define STATUS_IN_PAGE_ERROR cpu_to_le32(0xC0000006)
+#define STATUS_PAGEFILE_QUOTA cpu_to_le32(0xC0000007)
+#define STATUS_INVALID_HANDLE cpu_to_le32(0xC0000008)
+#define STATUS_BAD_INITIAL_STACK cpu_to_le32(0xC0000009)
+#define STATUS_BAD_INITIAL_PC cpu_to_le32(0xC000000A)
+#define STATUS_INVALID_CID cpu_to_le32(0xC000000B)
+#define STATUS_TIMER_NOT_CANCELED cpu_to_le32(0xC000000C)
+#define STATUS_INVALID_PARAMETER cpu_to_le32(0xC000000D)
+#define STATUS_NO_SUCH_DEVICE cpu_to_le32(0xC000000E)
+#define STATUS_NO_SUCH_FILE cpu_to_le32(0xC000000F)
+#define STATUS_INVALID_DEVICE_REQUEST cpu_to_le32(0xC0000010)
+#define STATUS_END_OF_FILE cpu_to_le32(0xC0000011)
+#define STATUS_WRONG_VOLUME cpu_to_le32(0xC0000012)
+#define STATUS_NO_MEDIA_IN_DEVICE cpu_to_le32(0xC0000013)
+#define STATUS_UNRECOGNIZED_MEDIA cpu_to_le32(0xC0000014)
+#define STATUS_NONEXISTENT_SECTOR cpu_to_le32(0xC0000015)
+#define STATUS_MORE_PROCESSING_REQUIRED cpu_to_le32(0xC0000016)
+#define STATUS_NO_MEMORY cpu_to_le32(0xC0000017)
+#define STATUS_CONFLICTING_ADDRESSES cpu_to_le32(0xC0000018)
+#define STATUS_NOT_MAPPED_VIEW cpu_to_le32(0xC0000019)
+#define STATUS_UNABLE_TO_FREE_VM cpu_to_le32(0xC000001A)
+#define STATUS_UNABLE_TO_DELETE_SECTION cpu_to_le32(0xC000001B)
+#define STATUS_INVALID_SYSTEM_SERVICE cpu_to_le32(0xC000001C)
+#define STATUS_ILLEGAL_INSTRUCTION cpu_to_le32(0xC000001D)
+#define STATUS_INVALID_LOCK_SEQUENCE cpu_to_le32(0xC000001E)
+#define STATUS_INVALID_VIEW_SIZE cpu_to_le32(0xC000001F)
+#define STATUS_INVALID_FILE_FOR_SECTION cpu_to_le32(0xC0000020)
+#define STATUS_ALREADY_COMMITTED cpu_to_le32(0xC0000021)
+#define STATUS_ACCESS_DENIED cpu_to_le32(0xC0000022)
+#define STATUS_BUFFER_TOO_SMALL cpu_to_le32(0xC0000023)
+#define STATUS_OBJECT_TYPE_MISMATCH cpu_to_le32(0xC0000024)
+#define STATUS_NONCONTINUABLE_EXCEPTION cpu_to_le32(0xC0000025)
+#define STATUS_INVALID_DISPOSITION cpu_to_le32(0xC0000026)
+#define STATUS_UNWIND cpu_to_le32(0xC0000027)
+#define STATUS_BAD_STACK cpu_to_le32(0xC0000028)
+#define STATUS_INVALID_UNWIND_TARGET cpu_to_le32(0xC0000029)
+#define STATUS_NOT_LOCKED cpu_to_le32(0xC000002A)
+#define STATUS_PARITY_ERROR cpu_to_le32(0xC000002B)
+#define STATUS_UNABLE_TO_DECOMMIT_VM cpu_to_le32(0xC000002C)
+#define STATUS_NOT_COMMITTED cpu_to_le32(0xC000002D)
+#define STATUS_INVALID_PORT_ATTRIBUTES cpu_to_le32(0xC000002E)
+#define STATUS_PORT_MESSAGE_TOO_LONG cpu_to_le32(0xC000002F)
+#define STATUS_INVALID_PARAMETER_MIX cpu_to_le32(0xC0000030)
+#define STATUS_INVALID_QUOTA_LOWER cpu_to_le32(0xC0000031)
+#define STATUS_DISK_CORRUPT_ERROR cpu_to_le32(0xC0000032)
+#define STATUS_OBJECT_NAME_INVALID cpu_to_le32(0xC0000033)
+#define STATUS_OBJECT_NAME_NOT_FOUND cpu_to_le32(0xC0000034)
+#define STATUS_OBJECT_NAME_COLLISION cpu_to_le32(0xC0000035)
+#define STATUS_PORT_DISCONNECTED cpu_to_le32(0xC0000037)
+#define STATUS_DEVICE_ALREADY_ATTACHED cpu_to_le32(0xC0000038)
+#define STATUS_OBJECT_PATH_INVALID cpu_to_le32(0xC0000039)
+#define STATUS_OBJECT_PATH_NOT_FOUND cpu_to_le32(0xC000003A)
+#define STATUS_OBJECT_PATH_SYNTAX_BAD cpu_to_le32(0xC000003B)
+#define STATUS_DATA_OVERRUN cpu_to_le32(0xC000003C)
+#define STATUS_DATA_LATE_ERROR cpu_to_le32(0xC000003D)
+#define STATUS_DATA_ERROR cpu_to_le32(0xC000003E)
+#define STATUS_CRC_ERROR cpu_to_le32(0xC000003F)
+#define STATUS_SECTION_TOO_BIG cpu_to_le32(0xC0000040)
+#define STATUS_PORT_CONNECTION_REFUSED cpu_to_le32(0xC0000041)
+#define STATUS_INVALID_PORT_HANDLE cpu_to_le32(0xC0000042)
+#define STATUS_SHARING_VIOLATION cpu_to_le32(0xC0000043)
+#define STATUS_QUOTA_EXCEEDED cpu_to_le32(0xC0000044)
+#define STATUS_INVALID_PAGE_PROTECTION cpu_to_le32(0xC0000045)
+#define STATUS_MUTANT_NOT_OWNED cpu_to_le32(0xC0000046)
+#define STATUS_SEMAPHORE_LIMIT_EXCEEDED cpu_to_le32(0xC0000047)
+#define STATUS_PORT_ALREADY_SET cpu_to_le32(0xC0000048)
+#define STATUS_SECTION_NOT_IMAGE cpu_to_le32(0xC0000049)
+#define STATUS_SUSPEND_COUNT_EXCEEDED cpu_to_le32(0xC000004A)
+#define STATUS_THREAD_IS_TERMINATING cpu_to_le32(0xC000004B)
+#define STATUS_BAD_WORKING_SET_LIMIT cpu_to_le32(0xC000004C)
+#define STATUS_INCOMPATIBLE_FILE_MAP cpu_to_le32(0xC000004D)
+#define STATUS_SECTION_PROTECTION cpu_to_le32(0xC000004E)
+#define STATUS_EAS_NOT_SUPPORTED cpu_to_le32(0xC000004F)
+#define STATUS_EA_TOO_LARGE cpu_to_le32(0xC0000050)
+#define STATUS_NONEXISTENT_EA_ENTRY cpu_to_le32(0xC0000051)
+#define STATUS_NO_EAS_ON_FILE cpu_to_le32(0xC0000052)
+#define STATUS_EA_CORRUPT_ERROR cpu_to_le32(0xC0000053)
+#define STATUS_FILE_LOCK_CONFLICT cpu_to_le32(0xC0000054)
+#define STATUS_LOCK_NOT_GRANTED cpu_to_le32(0xC0000055)
+#define STATUS_DELETE_PENDING cpu_to_le32(0xC0000056)
+#define STATUS_CTL_FILE_NOT_SUPPORTED cpu_to_le32(0xC0000057)
+#define STATUS_UNKNOWN_REVISION cpu_to_le32(0xC0000058)
+#define STATUS_REVISION_MISMATCH cpu_to_le32(0xC0000059)
+#define STATUS_INVALID_OWNER cpu_to_le32(0xC000005A)
+#define STATUS_INVALID_PRIMARY_GROUP cpu_to_le32(0xC000005B)
+#define STATUS_NO_IMPERSONATION_TOKEN cpu_to_le32(0xC000005C)
+#define STATUS_CANT_DISABLE_MANDATORY cpu_to_le32(0xC000005D)
+#define STATUS_NO_LOGON_SERVERS cpu_to_le32(0xC000005E)
+#define STATUS_NO_SUCH_LOGON_SESSION cpu_to_le32(0xC000005F)
+#define STATUS_NO_SUCH_PRIVILEGE cpu_to_le32(0xC0000060)
+#define STATUS_PRIVILEGE_NOT_HELD cpu_to_le32(0xC0000061)
+#define STATUS_INVALID_ACCOUNT_NAME cpu_to_le32(0xC0000062)
+#define STATUS_USER_EXISTS cpu_to_le32(0xC0000063)
+#define STATUS_NO_SUCH_USER cpu_to_le32(0xC0000064)
+#define STATUS_GROUP_EXISTS cpu_to_le32(0xC0000065)
+#define STATUS_NO_SUCH_GROUP cpu_to_le32(0xC0000066)
+#define STATUS_MEMBER_IN_GROUP cpu_to_le32(0xC0000067)
+#define STATUS_MEMBER_NOT_IN_GROUP cpu_to_le32(0xC0000068)
+#define STATUS_LAST_ADMIN cpu_to_le32(0xC0000069)
+#define STATUS_WRONG_PASSWORD cpu_to_le32(0xC000006A)
+#define STATUS_ILL_FORMED_PASSWORD cpu_to_le32(0xC000006B)
+#define STATUS_PASSWORD_RESTRICTION cpu_to_le32(0xC000006C)
+#define STATUS_LOGON_FAILURE cpu_to_le32(0xC000006D)
+#define STATUS_ACCOUNT_RESTRICTION cpu_to_le32(0xC000006E)
+#define STATUS_INVALID_LOGON_HOURS cpu_to_le32(0xC000006F)
+#define STATUS_INVALID_WORKSTATION cpu_to_le32(0xC0000070)
+#define STATUS_PASSWORD_EXPIRED cpu_to_le32(0xC0000071)
+#define STATUS_ACCOUNT_DISABLED cpu_to_le32(0xC0000072)
+#define STATUS_NONE_MAPPED cpu_to_le32(0xC0000073)
+#define STATUS_TOO_MANY_LUIDS_REQUESTED cpu_to_le32(0xC0000074)
+#define STATUS_LUIDS_EXHAUSTED cpu_to_le32(0xC0000075)
+#define STATUS_INVALID_SUB_AUTHORITY cpu_to_le32(0xC0000076)
+#define STATUS_INVALID_ACL cpu_to_le32(0xC0000077)
+#define STATUS_INVALID_SID cpu_to_le32(0xC0000078)
+#define STATUS_INVALID_SECURITY_DESCR cpu_to_le32(0xC0000079)
+#define STATUS_PROCEDURE_NOT_FOUND cpu_to_le32(0xC000007A)
+#define STATUS_INVALID_IMAGE_FORMAT cpu_to_le32(0xC000007B)
+#define STATUS_NO_TOKEN cpu_to_le32(0xC000007C)
+#define STATUS_BAD_INHERITANCE_ACL cpu_to_le32(0xC000007D)
+#define STATUS_RANGE_NOT_LOCKED cpu_to_le32(0xC000007E)
+#define STATUS_DISK_FULL cpu_to_le32(0xC000007F)
+#define STATUS_SERVER_DISABLED cpu_to_le32(0xC0000080)
+#define STATUS_SERVER_NOT_DISABLED cpu_to_le32(0xC0000081)
+#define STATUS_TOO_MANY_GUIDS_REQUESTED cpu_to_le32(0xC0000082)
+#define STATUS_GUIDS_EXHAUSTED cpu_to_le32(0xC0000083)
+#define STATUS_INVALID_ID_AUTHORITY cpu_to_le32(0xC0000084)
+#define STATUS_AGENTS_EXHAUSTED cpu_to_le32(0xC0000085)
+#define STATUS_INVALID_VOLUME_LABEL cpu_to_le32(0xC0000086)
+#define STATUS_SECTION_NOT_EXTENDED cpu_to_le32(0xC0000087)
+#define STATUS_NOT_MAPPED_DATA cpu_to_le32(0xC0000088)
+#define STATUS_RESOURCE_DATA_NOT_FOUND cpu_to_le32(0xC0000089)
+#define STATUS_RESOURCE_TYPE_NOT_FOUND cpu_to_le32(0xC000008A)
+#define STATUS_RESOURCE_NAME_NOT_FOUND cpu_to_le32(0xC000008B)
+#define STATUS_ARRAY_BOUNDS_EXCEEDED cpu_to_le32(0xC000008C)
+#define STATUS_FLOAT_DENORMAL_OPERAND cpu_to_le32(0xC000008D)
+#define STATUS_FLOAT_DIVIDE_BY_ZERO cpu_to_le32(0xC000008E)
+#define STATUS_FLOAT_INEXACT_RESULT cpu_to_le32(0xC000008F)
+#define STATUS_FLOAT_INVALID_OPERATION cpu_to_le32(0xC0000090)
+#define STATUS_FLOAT_OVERFLOW cpu_to_le32(0xC0000091)
+#define STATUS_FLOAT_STACK_CHECK cpu_to_le32(0xC0000092)
+#define STATUS_FLOAT_UNDERFLOW cpu_to_le32(0xC0000093)
+#define STATUS_INTEGER_DIVIDE_BY_ZERO cpu_to_le32(0xC0000094)
+#define STATUS_INTEGER_OVERFLOW cpu_to_le32(0xC0000095)
+#define STATUS_PRIVILEGED_INSTRUCTION cpu_to_le32(0xC0000096)
+#define STATUS_TOO_MANY_PAGING_FILES cpu_to_le32(0xC0000097)
+#define STATUS_FILE_INVALID cpu_to_le32(0xC0000098)
+#define STATUS_ALLOTTED_SPACE_EXCEEDED cpu_to_le32(0xC0000099)
+#define STATUS_INSUFFICIENT_RESOURCES cpu_to_le32(0xC000009A)
+#define STATUS_DFS_EXIT_PATH_FOUND cpu_to_le32(0xC000009B)
+#define STATUS_DEVICE_DATA_ERROR cpu_to_le32(0xC000009C)
+#define STATUS_DEVICE_NOT_CONNECTED cpu_to_le32(0xC000009D)
+#define STATUS_DEVICE_POWER_FAILURE cpu_to_le32(0xC000009E)
+#define STATUS_FREE_VM_NOT_AT_BASE cpu_to_le32(0xC000009F)
+#define STATUS_MEMORY_NOT_ALLOCATED cpu_to_le32(0xC00000A0)
+#define STATUS_WORKING_SET_QUOTA cpu_to_le32(0xC00000A1)
+#define STATUS_MEDIA_WRITE_PROTECTED cpu_to_le32(0xC00000A2)
+#define STATUS_DEVICE_NOT_READY cpu_to_le32(0xC00000A3)
+#define STATUS_INVALID_GROUP_ATTRIBUTES cpu_to_le32(0xC00000A4)
+#define STATUS_BAD_IMPERSONATION_LEVEL cpu_to_le32(0xC00000A5)
+#define STATUS_CANT_OPEN_ANONYMOUS cpu_to_le32(0xC00000A6)
+#define STATUS_BAD_VALIDATION_CLASS cpu_to_le32(0xC00000A7)
+#define STATUS_BAD_TOKEN_TYPE cpu_to_le32(0xC00000A8)
+#define STATUS_BAD_MASTER_BOOT_RECORD cpu_to_le32(0xC00000A9)
+#define STATUS_INSTRUCTION_MISALIGNMENT cpu_to_le32(0xC00000AA)
+#define STATUS_INSTANCE_NOT_AVAILABLE cpu_to_le32(0xC00000AB)
+#define STATUS_PIPE_NOT_AVAILABLE cpu_to_le32(0xC00000AC)
+#define STATUS_INVALID_PIPE_STATE cpu_to_le32(0xC00000AD)
+#define STATUS_PIPE_BUSY cpu_to_le32(0xC00000AE)
+#define STATUS_ILLEGAL_FUNCTION cpu_to_le32(0xC00000AF)
+#define STATUS_PIPE_DISCONNECTED cpu_to_le32(0xC00000B0)
+#define STATUS_PIPE_CLOSING cpu_to_le32(0xC00000B1)
+#define STATUS_PIPE_CONNECTED cpu_to_le32(0xC00000B2)
+#define STATUS_PIPE_LISTENING cpu_to_le32(0xC00000B3)
+#define STATUS_INVALID_READ_MODE cpu_to_le32(0xC00000B4)
+#define STATUS_IO_TIMEOUT cpu_to_le32(0xC00000B5)
+#define STATUS_FILE_FORCED_CLOSED cpu_to_le32(0xC00000B6)
+#define STATUS_PROFILING_NOT_STARTED cpu_to_le32(0xC00000B7)
+#define STATUS_PROFILING_NOT_STOPPED cpu_to_le32(0xC00000B8)
+#define STATUS_COULD_NOT_INTERPRET cpu_to_le32(0xC00000B9)
+#define STATUS_FILE_IS_A_DIRECTORY cpu_to_le32(0xC00000BA)
+#define STATUS_NOT_SUPPORTED cpu_to_le32(0xC00000BB)
+#define STATUS_REMOTE_NOT_LISTENING cpu_to_le32(0xC00000BC)
+#define STATUS_DUPLICATE_NAME cpu_to_le32(0xC00000BD)
+#define STATUS_BAD_NETWORK_PATH cpu_to_le32(0xC00000BE)
+#define STATUS_NETWORK_BUSY cpu_to_le32(0xC00000BF)
+#define STATUS_DEVICE_DOES_NOT_EXIST cpu_to_le32(0xC00000C0)
+#define STATUS_TOO_MANY_COMMANDS cpu_to_le32(0xC00000C1)
+#define STATUS_ADAPTER_HARDWARE_ERROR cpu_to_le32(0xC00000C2)
+#define STATUS_INVALID_NETWORK_RESPONSE cpu_to_le32(0xC00000C3)
+#define STATUS_UNEXPECTED_NETWORK_ERROR cpu_to_le32(0xC00000C4)
+#define STATUS_BAD_REMOTE_ADAPTER cpu_to_le32(0xC00000C5)
+#define STATUS_PRINT_QUEUE_FULL cpu_to_le32(0xC00000C6)
+#define STATUS_NO_SPOOL_SPACE cpu_to_le32(0xC00000C7)
+#define STATUS_PRINT_CANCELLED cpu_to_le32(0xC00000C8)
+#define STATUS_NETWORK_NAME_DELETED cpu_to_le32(0xC00000C9)
+#define STATUS_NETWORK_ACCESS_DENIED cpu_to_le32(0xC00000CA)
+#define STATUS_BAD_DEVICE_TYPE cpu_to_le32(0xC00000CB)
+#define STATUS_BAD_NETWORK_NAME cpu_to_le32(0xC00000CC)
+#define STATUS_TOO_MANY_NAMES cpu_to_le32(0xC00000CD)
+#define STATUS_TOO_MANY_SESSIONS cpu_to_le32(0xC00000CE)
+#define STATUS_SHARING_PAUSED cpu_to_le32(0xC00000CF)
+#define STATUS_REQUEST_NOT_ACCEPTED cpu_to_le32(0xC00000D0)
+#define STATUS_REDIRECTOR_PAUSED cpu_to_le32(0xC00000D1)
+#define STATUS_NET_WRITE_FAULT cpu_to_le32(0xC00000D2)
+#define STATUS_PROFILING_AT_LIMIT cpu_to_le32(0xC00000D3)
+#define STATUS_NOT_SAME_DEVICE cpu_to_le32(0xC00000D4)
+#define STATUS_FILE_RENAMED cpu_to_le32(0xC00000D5)
+#define STATUS_VIRTUAL_CIRCUIT_CLOSED cpu_to_le32(0xC00000D6)
+#define STATUS_NO_SECURITY_ON_OBJECT cpu_to_le32(0xC00000D7)
+#define STATUS_CANT_WAIT cpu_to_le32(0xC00000D8)
+#define STATUS_PIPE_EMPTY cpu_to_le32(0xC00000D9)
+#define STATUS_CANT_ACCESS_DOMAIN_INFO cpu_to_le32(0xC00000DA)
+#define STATUS_CANT_TERMINATE_SELF cpu_to_le32(0xC00000DB)
+#define STATUS_INVALID_SERVER_STATE cpu_to_le32(0xC00000DC)
+#define STATUS_INVALID_DOMAIN_STATE cpu_to_le32(0xC00000DD)
+#define STATUS_INVALID_DOMAIN_ROLE cpu_to_le32(0xC00000DE)
+#define STATUS_NO_SUCH_DOMAIN cpu_to_le32(0xC00000DF)
+#define STATUS_DOMAIN_EXISTS cpu_to_le32(0xC00000E0)
+#define STATUS_DOMAIN_LIMIT_EXCEEDED cpu_to_le32(0xC00000E1)
+#define STATUS_OPLOCK_NOT_GRANTED cpu_to_le32(0xC00000E2)
+#define STATUS_INVALID_OPLOCK_PROTOCOL cpu_to_le32(0xC00000E3)
+#define STATUS_INTERNAL_DB_CORRUPTION cpu_to_le32(0xC00000E4)
+#define STATUS_INTERNAL_ERROR cpu_to_le32(0xC00000E5)
+#define STATUS_GENERIC_NOT_MAPPED cpu_to_le32(0xC00000E6)
+#define STATUS_BAD_DESCRIPTOR_FORMAT cpu_to_le32(0xC00000E7)
+#define STATUS_INVALID_USER_BUFFER cpu_to_le32(0xC00000E8)
+#define STATUS_UNEXPECTED_IO_ERROR cpu_to_le32(0xC00000E9)
+#define STATUS_UNEXPECTED_MM_CREATE_ERR cpu_to_le32(0xC00000EA)
+#define STATUS_UNEXPECTED_MM_MAP_ERROR cpu_to_le32(0xC00000EB)
+#define STATUS_UNEXPECTED_MM_EXTEND_ERR cpu_to_le32(0xC00000EC)
+#define STATUS_NOT_LOGON_PROCESS cpu_to_le32(0xC00000ED)
+#define STATUS_LOGON_SESSION_EXISTS cpu_to_le32(0xC00000EE)
+#define STATUS_INVALID_PARAMETER_1 cpu_to_le32(0xC00000EF)
+#define STATUS_INVALID_PARAMETER_2 cpu_to_le32(0xC00000F0)
+#define STATUS_INVALID_PARAMETER_3 cpu_to_le32(0xC00000F1)
+#define STATUS_INVALID_PARAMETER_4 cpu_to_le32(0xC00000F2)
+#define STATUS_INVALID_PARAMETER_5 cpu_to_le32(0xC00000F3)
+#define STATUS_INVALID_PARAMETER_6 cpu_to_le32(0xC00000F4)
+#define STATUS_INVALID_PARAMETER_7 cpu_to_le32(0xC00000F5)
+#define STATUS_INVALID_PARAMETER_8 cpu_to_le32(0xC00000F6)
+#define STATUS_INVALID_PARAMETER_9 cpu_to_le32(0xC00000F7)
+#define STATUS_INVALID_PARAMETER_10 cpu_to_le32(0xC00000F8)
+#define STATUS_INVALID_PARAMETER_11 cpu_to_le32(0xC00000F9)
+#define STATUS_INVALID_PARAMETER_12 cpu_to_le32(0xC00000FA)
+#define STATUS_REDIRECTOR_NOT_STARTED cpu_to_le32(0xC00000FB)
+#define STATUS_REDIRECTOR_STARTED cpu_to_le32(0xC00000FC)
+#define STATUS_STACK_OVERFLOW cpu_to_le32(0xC00000FD)
+#define STATUS_NO_SUCH_PACKAGE cpu_to_le32(0xC00000FE)
+#define STATUS_BAD_FUNCTION_TABLE cpu_to_le32(0xC00000FF)
+#define STATUS_VARIABLE_NOT_FOUND cpu_to_le32(0xC0000100)
+#define STATUS_DIRECTORY_NOT_EMPTY cpu_to_le32(0xC0000101)
+#define STATUS_FILE_CORRUPT_ERROR cpu_to_le32(0xC0000102)
+#define STATUS_NOT_A_DIRECTORY cpu_to_le32(0xC0000103)
+#define STATUS_BAD_LOGON_SESSION_STATE cpu_to_le32(0xC0000104)
+#define STATUS_LOGON_SESSION_COLLISION cpu_to_le32(0xC0000105)
+#define STATUS_NAME_TOO_LONG cpu_to_le32(0xC0000106)
+#define STATUS_FILES_OPEN cpu_to_le32(0xC0000107)
+#define STATUS_CONNECTION_IN_USE cpu_to_le32(0xC0000108)
+#define STATUS_MESSAGE_NOT_FOUND cpu_to_le32(0xC0000109)
+#define STATUS_PROCESS_IS_TERMINATING cpu_to_le32(0xC000010A)
+#define STATUS_INVALID_LOGON_TYPE cpu_to_le32(0xC000010B)
+#define STATUS_NO_GUID_TRANSLATION cpu_to_le32(0xC000010C)
+#define STATUS_CANNOT_IMPERSONATE cpu_to_le32(0xC000010D)
+#define STATUS_IMAGE_ALREADY_LOADED cpu_to_le32(0xC000010E)
+#define STATUS_ABIOS_NOT_PRESENT cpu_to_le32(0xC000010F)
+#define STATUS_ABIOS_LID_NOT_EXIST cpu_to_le32(0xC0000110)
+#define STATUS_ABIOS_LID_ALREADY_OWNED cpu_to_le32(0xC0000111)
+#define STATUS_ABIOS_NOT_LID_OWNER cpu_to_le32(0xC0000112)
+#define STATUS_ABIOS_INVALID_COMMAND cpu_to_le32(0xC0000113)
+#define STATUS_ABIOS_INVALID_LID cpu_to_le32(0xC0000114)
+#define STATUS_ABIOS_SELECTOR_NOT_AVAILABLE cpu_to_le32(0xC0000115)
+#define STATUS_ABIOS_INVALID_SELECTOR cpu_to_le32(0xC0000116)
+#define STATUS_NO_LDT cpu_to_le32(0xC0000117)
+#define STATUS_INVALID_LDT_SIZE cpu_to_le32(0xC0000118)
+#define STATUS_INVALID_LDT_OFFSET cpu_to_le32(0xC0000119)
+#define STATUS_INVALID_LDT_DESCRIPTOR cpu_to_le32(0xC000011A)
+#define STATUS_INVALID_IMAGE_NE_FORMAT cpu_to_le32(0xC000011B)
+#define STATUS_RXACT_INVALID_STATE cpu_to_le32(0xC000011C)
+#define STATUS_RXACT_COMMIT_FAILURE cpu_to_le32(0xC000011D)
+#define STATUS_MAPPED_FILE_SIZE_ZERO cpu_to_le32(0xC000011E)
+#define STATUS_TOO_MANY_OPENED_FILES cpu_to_le32(0xC000011F)
+#define STATUS_CANCELLED cpu_to_le32(0xC0000120)
+#define STATUS_CANNOT_DELETE cpu_to_le32(0xC0000121)
+#define STATUS_INVALID_COMPUTER_NAME cpu_to_le32(0xC0000122)
+#define STATUS_FILE_DELETED cpu_to_le32(0xC0000123)
+#define STATUS_SPECIAL_ACCOUNT cpu_to_le32(0xC0000124)
+#define STATUS_SPECIAL_GROUP cpu_to_le32(0xC0000125)
+#define STATUS_SPECIAL_USER cpu_to_le32(0xC0000126)
+#define STATUS_MEMBERS_PRIMARY_GROUP cpu_to_le32(0xC0000127)
+#define STATUS_FILE_CLOSED cpu_to_le32(0xC0000128)
+#define STATUS_TOO_MANY_THREADS cpu_to_le32(0xC0000129)
+#define STATUS_THREAD_NOT_IN_PROCESS cpu_to_le32(0xC000012A)
+#define STATUS_TOKEN_ALREADY_IN_USE cpu_to_le32(0xC000012B)
+#define STATUS_PAGEFILE_QUOTA_EXCEEDED cpu_to_le32(0xC000012C)
+#define STATUS_COMMITMENT_LIMIT cpu_to_le32(0xC000012D)
+#define STATUS_INVALID_IMAGE_LE_FORMAT cpu_to_le32(0xC000012E)
+#define STATUS_INVALID_IMAGE_NOT_MZ cpu_to_le32(0xC000012F)
+#define STATUS_INVALID_IMAGE_PROTECT cpu_to_le32(0xC0000130)
+#define STATUS_INVALID_IMAGE_WIN_16 cpu_to_le32(0xC0000131)
+#define STATUS_LOGON_SERVER_CONFLICT cpu_to_le32(0xC0000132)
+#define STATUS_TIME_DIFFERENCE_AT_DC cpu_to_le32(0xC0000133)
+#define STATUS_SYNCHRONIZATION_REQUIRED cpu_to_le32(0xC0000134)
+#define STATUS_DLL_NOT_FOUND cpu_to_le32(0xC0000135)
+#define STATUS_OPEN_FAILED cpu_to_le32(0xC0000136)
+#define STATUS_IO_PRIVILEGE_FAILED cpu_to_le32(0xC0000137)
+#define STATUS_ORDINAL_NOT_FOUND cpu_to_le32(0xC0000138)
+#define STATUS_ENTRYPOINT_NOT_FOUND cpu_to_le32(0xC0000139)
+#define STATUS_CONTROL_C_EXIT cpu_to_le32(0xC000013A)
+#define STATUS_LOCAL_DISCONNECT cpu_to_le32(0xC000013B)
+#define STATUS_REMOTE_DISCONNECT cpu_to_le32(0xC000013C)
+#define STATUS_REMOTE_RESOURCES cpu_to_le32(0xC000013D)
+#define STATUS_LINK_FAILED cpu_to_le32(0xC000013E)
+#define STATUS_LINK_TIMEOUT cpu_to_le32(0xC000013F)
+#define STATUS_INVALID_CONNECTION cpu_to_le32(0xC0000140)
+#define STATUS_INVALID_ADDRESS cpu_to_le32(0xC0000141)
+#define STATUS_DLL_INIT_FAILED cpu_to_le32(0xC0000142)
+#define STATUS_MISSING_SYSTEMFILE cpu_to_le32(0xC0000143)
+#define STATUS_UNHANDLED_EXCEPTION cpu_to_le32(0xC0000144)
+#define STATUS_APP_INIT_FAILURE cpu_to_le32(0xC0000145)
+#define STATUS_PAGEFILE_CREATE_FAILED cpu_to_le32(0xC0000146)
+#define STATUS_NO_PAGEFILE cpu_to_le32(0xC0000147)
+#define STATUS_INVALID_LEVEL cpu_to_le32(0xC0000148)
+#define STATUS_WRONG_PASSWORD_CORE cpu_to_le32(0xC0000149)
+#define STATUS_ILLEGAL_FLOAT_CONTEXT cpu_to_le32(0xC000014A)
+#define STATUS_PIPE_BROKEN cpu_to_le32(0xC000014B)
+#define STATUS_REGISTRY_CORRUPT cpu_to_le32(0xC000014C)
+#define STATUS_REGISTRY_IO_FAILED cpu_to_le32(0xC000014D)
+#define STATUS_NO_EVENT_PAIR cpu_to_le32(0xC000014E)
+#define STATUS_UNRECOGNIZED_VOLUME cpu_to_le32(0xC000014F)
+#define STATUS_SERIAL_NO_DEVICE_INITED cpu_to_le32(0xC0000150)
+#define STATUS_NO_SUCH_ALIAS cpu_to_le32(0xC0000151)
+#define STATUS_MEMBER_NOT_IN_ALIAS cpu_to_le32(0xC0000152)
+#define STATUS_MEMBER_IN_ALIAS cpu_to_le32(0xC0000153)
+#define STATUS_ALIAS_EXISTS cpu_to_le32(0xC0000154)
+#define STATUS_LOGON_NOT_GRANTED cpu_to_le32(0xC0000155)
+#define STATUS_TOO_MANY_SECRETS cpu_to_le32(0xC0000156)
+#define STATUS_SECRET_TOO_LONG cpu_to_le32(0xC0000157)
+#define STATUS_INTERNAL_DB_ERROR cpu_to_le32(0xC0000158)
+#define STATUS_FULLSCREEN_MODE cpu_to_le32(0xC0000159)
+#define STATUS_TOO_MANY_CONTEXT_IDS cpu_to_le32(0xC000015A)
+#define STATUS_LOGON_TYPE_NOT_GRANTED cpu_to_le32(0xC000015B)
+#define STATUS_NOT_REGISTRY_FILE cpu_to_le32(0xC000015C)
+#define STATUS_NT_CROSS_ENCRYPTION_REQUIRED cpu_to_le32(0xC000015D)
+#define STATUS_DOMAIN_CTRLR_CONFIG_ERROR cpu_to_le32(0xC000015E)
+#define STATUS_FT_MISSING_MEMBER cpu_to_le32(0xC000015F)
+#define STATUS_ILL_FORMED_SERVICE_ENTRY cpu_to_le32(0xC0000160)
+#define STATUS_ILLEGAL_CHARACTER cpu_to_le32(0xC0000161)
+#define STATUS_UNMAPPABLE_CHARACTER cpu_to_le32(0xC0000162)
+#define STATUS_UNDEFINED_CHARACTER cpu_to_le32(0xC0000163)
+#define STATUS_FLOPPY_VOLUME cpu_to_le32(0xC0000164)
+#define STATUS_FLOPPY_ID_MARK_NOT_FOUND cpu_to_le32(0xC0000165)
+#define STATUS_FLOPPY_WRONG_CYLINDER cpu_to_le32(0xC0000166)
+#define STATUS_FLOPPY_UNKNOWN_ERROR cpu_to_le32(0xC0000167)
+#define STATUS_FLOPPY_BAD_REGISTERS cpu_to_le32(0xC0000168)
+#define STATUS_DISK_RECALIBRATE_FAILED cpu_to_le32(0xC0000169)
+#define STATUS_DISK_OPERATION_FAILED cpu_to_le32(0xC000016A)
+#define STATUS_DISK_RESET_FAILED cpu_to_le32(0xC000016B)
+#define STATUS_SHARED_IRQ_BUSY cpu_to_le32(0xC000016C)
+#define STATUS_FT_ORPHANING cpu_to_le32(0xC000016D)
+#define STATUS_BIOS_FAILED_TO_CONNECT_INTERRUPT cpu_to_le32(0xC000016E)
+#define STATUS_PARTITION_FAILURE cpu_to_le32(0xC0000172)
+#define STATUS_INVALID_BLOCK_LENGTH cpu_to_le32(0xC0000173)
+#define STATUS_DEVICE_NOT_PARTITIONED cpu_to_le32(0xC0000174)
+#define STATUS_UNABLE_TO_LOCK_MEDIA cpu_to_le32(0xC0000175)
+#define STATUS_UNABLE_TO_UNLOAD_MEDIA cpu_to_le32(0xC0000176)
+#define STATUS_EOM_OVERFLOW cpu_to_le32(0xC0000177)
+#define STATUS_NO_MEDIA cpu_to_le32(0xC0000178)
+#define STATUS_NO_SUCH_MEMBER cpu_to_le32(0xC000017A)
+#define STATUS_INVALID_MEMBER cpu_to_le32(0xC000017B)
+#define STATUS_KEY_DELETED cpu_to_le32(0xC000017C)
+#define STATUS_NO_LOG_SPACE cpu_to_le32(0xC000017D)
+#define STATUS_TOO_MANY_SIDS cpu_to_le32(0xC000017E)
+#define STATUS_LM_CROSS_ENCRYPTION_REQUIRED cpu_to_le32(0xC000017F)
+#define STATUS_KEY_HAS_CHILDREN cpu_to_le32(0xC0000180)
+#define STATUS_CHILD_MUST_BE_VOLATILE cpu_to_le32(0xC0000181)
+#define STATUS_DEVICE_CONFIGURATION_ERROR cpu_to_le32(0xC0000182)
+#define STATUS_DRIVER_INTERNAL_ERROR cpu_to_le32(0xC0000183)
+#define STATUS_INVALID_DEVICE_STATE cpu_to_le32(0xC0000184)
+#define STATUS_IO_DEVICE_ERROR cpu_to_le32(0xC0000185)
+#define STATUS_DEVICE_PROTOCOL_ERROR cpu_to_le32(0xC0000186)
+#define STATUS_BACKUP_CONTROLLER cpu_to_le32(0xC0000187)
+#define STATUS_LOG_FILE_FULL cpu_to_le32(0xC0000188)
+#define STATUS_TOO_LATE cpu_to_le32(0xC0000189)
+#define STATUS_NO_TRUST_LSA_SECRET cpu_to_le32(0xC000018A)
+#define STATUS_NO_TRUST_SAM_ACCOUNT cpu_to_le32(0xC000018B)
+#define STATUS_TRUSTED_DOMAIN_FAILURE cpu_to_le32(0xC000018C)
+#define STATUS_TRUSTED_RELATIONSHIP_FAILURE cpu_to_le32(0xC000018D)
+#define STATUS_EVENTLOG_FILE_CORRUPT cpu_to_le32(0xC000018E)
+#define STATUS_EVENTLOG_CANT_START cpu_to_le32(0xC000018F)
+#define STATUS_TRUST_FAILURE cpu_to_le32(0xC0000190)
+#define STATUS_MUTANT_LIMIT_EXCEEDED cpu_to_le32(0xC0000191)
+#define STATUS_NETLOGON_NOT_STARTED cpu_to_le32(0xC0000192)
+#define STATUS_ACCOUNT_EXPIRED cpu_to_le32(0xC0000193)
+#define STATUS_POSSIBLE_DEADLOCK cpu_to_le32(0xC0000194)
+#define STATUS_NETWORK_CREDENTIAL_CONFLICT cpu_to_le32(0xC0000195)
+#define STATUS_REMOTE_SESSION_LIMIT cpu_to_le32(0xC0000196)
+#define STATUS_EVENTLOG_FILE_CHANGED cpu_to_le32(0xC0000197)
+#define STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT cpu_to_le32(0xC0000198)
+#define STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT cpu_to_le32(0xC0000199)
+#define STATUS_NOLOGON_SERVER_TRUST_ACCOUNT cpu_to_le32(0xC000019A)
+#define STATUS_DOMAIN_TRUST_INCONSISTENT cpu_to_le32(0xC000019B)
+#define STATUS_FS_DRIVER_REQUIRED cpu_to_le32(0xC000019C)
+#define STATUS_IMAGE_ALREADY_LOADED_AS_DLL cpu_to_le32(0xC000019D)
+#define STATUS_NETWORK_OPEN_RESTRICTION cpu_to_le32(0xC0000201)
+#define STATUS_NO_USER_SESSION_KEY cpu_to_le32(0xC0000202)
+#define STATUS_USER_SESSION_DELETED cpu_to_le32(0xC0000203)
+#define STATUS_RESOURCE_LANG_NOT_FOUND cpu_to_le32(0xC0000204)
+#define STATUS_INSUFF_SERVER_RESOURCES cpu_to_le32(0xC0000205)
+#define STATUS_INVALID_BUFFER_SIZE cpu_to_le32(0xC0000206)
+#define STATUS_INVALID_ADDRESS_COMPONENT cpu_to_le32(0xC0000207)
+#define STATUS_INVALID_ADDRESS_WILDCARD cpu_to_le32(0xC0000208)
+#define STATUS_TOO_MANY_ADDRESSES cpu_to_le32(0xC0000209)
+#define STATUS_ADDRESS_ALREADY_EXISTS cpu_to_le32(0xC000020A)
+#define STATUS_ADDRESS_CLOSED cpu_to_le32(0xC000020B)
+#define STATUS_CONNECTION_DISCONNECTED cpu_to_le32(0xC000020C)
+#define STATUS_CONNECTION_RESET cpu_to_le32(0xC000020D)
+#define STATUS_TOO_MANY_NODES cpu_to_le32(0xC000020E)
+#define STATUS_TRANSACTION_ABORTED cpu_to_le32(0xC000020F)
+#define STATUS_TRANSACTION_TIMED_OUT cpu_to_le32(0xC0000210)
+#define STATUS_TRANSACTION_NO_RELEASE cpu_to_le32(0xC0000211)
+#define STATUS_TRANSACTION_NO_MATCH cpu_to_le32(0xC0000212)
+#define STATUS_TRANSACTION_RESPONDED cpu_to_le32(0xC0000213)
+#define STATUS_TRANSACTION_INVALID_ID cpu_to_le32(0xC0000214)
+#define STATUS_TRANSACTION_INVALID_TYPE cpu_to_le32(0xC0000215)
+#define STATUS_NOT_SERVER_SESSION cpu_to_le32(0xC0000216)
+#define STATUS_NOT_CLIENT_SESSION cpu_to_le32(0xC0000217)
+#define STATUS_CANNOT_LOAD_REGISTRY_FILE cpu_to_le32(0xC0000218)
+#define STATUS_DEBUG_ATTACH_FAILED cpu_to_le32(0xC0000219)
+#define STATUS_SYSTEM_PROCESS_TERMINATED cpu_to_le32(0xC000021A)
+#define STATUS_DATA_NOT_ACCEPTED cpu_to_le32(0xC000021B)
+#define STATUS_NO_BROWSER_SERVERS_FOUND cpu_to_le32(0xC000021C)
+#define STATUS_VDM_HARD_ERROR cpu_to_le32(0xC000021D)
+#define STATUS_DRIVER_CANCEL_TIMEOUT cpu_to_le32(0xC000021E)
+#define STATUS_REPLY_MESSAGE_MISMATCH cpu_to_le32(0xC000021F)
+#define STATUS_MAPPED_ALIGNMENT cpu_to_le32(0xC0000220)
+#define STATUS_IMAGE_CHECKSUM_MISMATCH cpu_to_le32(0xC0000221)
+#define STATUS_LOST_WRITEBEHIND_DATA cpu_to_le32(0xC0000222)
+#define STATUS_CLIENT_SERVER_PARAMETERS_INVALID cpu_to_le32(0xC0000223)
+#define STATUS_PASSWORD_MUST_CHANGE cpu_to_le32(0xC0000224)
+#define STATUS_NOT_FOUND cpu_to_le32(0xC0000225)
+#define STATUS_NOT_TINY_STREAM cpu_to_le32(0xC0000226)
+#define STATUS_RECOVERY_FAILURE cpu_to_le32(0xC0000227)
+#define STATUS_STACK_OVERFLOW_READ cpu_to_le32(0xC0000228)
+#define STATUS_FAIL_CHECK cpu_to_le32(0xC0000229)
+#define STATUS_DUPLICATE_OBJECTID cpu_to_le32(0xC000022A)
+#define STATUS_OBJECTID_EXISTS cpu_to_le32(0xC000022B)
+#define STATUS_CONVERT_TO_LARGE cpu_to_le32(0xC000022C)
+#define STATUS_RETRY cpu_to_le32(0xC000022D)
+#define STATUS_FOUND_OUT_OF_SCOPE cpu_to_le32(0xC000022E)
+#define STATUS_ALLOCATE_BUCKET cpu_to_le32(0xC000022F)
+#define STATUS_PROPSET_NOT_FOUND cpu_to_le32(0xC0000230)
+#define STATUS_MARSHALL_OVERFLOW cpu_to_le32(0xC0000231)
+#define STATUS_INVALID_VARIANT cpu_to_le32(0xC0000232)
+#define STATUS_DOMAIN_CONTROLLER_NOT_FOUND cpu_to_le32(0xC0000233)
+#define STATUS_ACCOUNT_LOCKED_OUT cpu_to_le32(0xC0000234)
+#define STATUS_HANDLE_NOT_CLOSABLE cpu_to_le32(0xC0000235)
+#define STATUS_CONNECTION_REFUSED cpu_to_le32(0xC0000236)
+#define STATUS_GRACEFUL_DISCONNECT cpu_to_le32(0xC0000237)
+#define STATUS_ADDRESS_ALREADY_ASSOCIATED cpu_to_le32(0xC0000238)
+#define STATUS_ADDRESS_NOT_ASSOCIATED cpu_to_le32(0xC0000239)
+#define STATUS_CONNECTION_INVALID cpu_to_le32(0xC000023A)
+#define STATUS_CONNECTION_ACTIVE cpu_to_le32(0xC000023B)
+#define STATUS_NETWORK_UNREACHABLE cpu_to_le32(0xC000023C)
+#define STATUS_HOST_UNREACHABLE cpu_to_le32(0xC000023D)
+#define STATUS_PROTOCOL_UNREACHABLE cpu_to_le32(0xC000023E)
+#define STATUS_PORT_UNREACHABLE cpu_to_le32(0xC000023F)
+#define STATUS_REQUEST_ABORTED cpu_to_le32(0xC0000240)
+#define STATUS_CONNECTION_ABORTED cpu_to_le32(0xC0000241)
+#define STATUS_BAD_COMPRESSION_BUFFER cpu_to_le32(0xC0000242)
+#define STATUS_USER_MAPPED_FILE cpu_to_le32(0xC0000243)
+#define STATUS_AUDIT_FAILED cpu_to_le32(0xC0000244)
+#define STATUS_TIMER_RESOLUTION_NOT_SET cpu_to_le32(0xC0000245)
+#define STATUS_CONNECTION_COUNT_LIMIT cpu_to_le32(0xC0000246)
+#define STATUS_LOGIN_TIME_RESTRICTION cpu_to_le32(0xC0000247)
+#define STATUS_LOGIN_WKSTA_RESTRICTION cpu_to_le32(0xC0000248)
+#define STATUS_IMAGE_MP_UP_MISMATCH cpu_to_le32(0xC0000249)
+#define STATUS_INSUFFICIENT_LOGON_INFO cpu_to_le32(0xC0000250)
+#define STATUS_BAD_DLL_ENTRYPOINT cpu_to_le32(0xC0000251)
+#define STATUS_BAD_SERVICE_ENTRYPOINT cpu_to_le32(0xC0000252)
+#define STATUS_LPC_REPLY_LOST cpu_to_le32(0xC0000253)
+#define STATUS_IP_ADDRESS_CONFLICT1 cpu_to_le32(0xC0000254)
+#define STATUS_IP_ADDRESS_CONFLICT2 cpu_to_le32(0xC0000255)
+#define STATUS_REGISTRY_QUOTA_LIMIT cpu_to_le32(0xC0000256)
+#define STATUS_PATH_NOT_COVERED cpu_to_le32(0xC0000257)
+#define STATUS_NO_CALLBACK_ACTIVE cpu_to_le32(0xC0000258)
+#define STATUS_LICENSE_QUOTA_EXCEEDED cpu_to_le32(0xC0000259)
+#define STATUS_PWD_TOO_SHORT cpu_to_le32(0xC000025A)
+#define STATUS_PWD_TOO_RECENT cpu_to_le32(0xC000025B)
+#define STATUS_PWD_HISTORY_CONFLICT cpu_to_le32(0xC000025C)
+#define STATUS_PLUGPLAY_NO_DEVICE cpu_to_le32(0xC000025E)
+#define STATUS_UNSUPPORTED_COMPRESSION cpu_to_le32(0xC000025F)
+#define STATUS_INVALID_HW_PROFILE cpu_to_le32(0xC0000260)
+#define STATUS_INVALID_PLUGPLAY_DEVICE_PATH cpu_to_le32(0xC0000261)
+#define STATUS_DRIVER_ORDINAL_NOT_FOUND cpu_to_le32(0xC0000262)
+#define STATUS_DRIVER_ENTRYPOINT_NOT_FOUND cpu_to_le32(0xC0000263)
+#define STATUS_RESOURCE_NOT_OWNED cpu_to_le32(0xC0000264)
+#define STATUS_TOO_MANY_LINKS cpu_to_le32(0xC0000265)
+#define STATUS_QUOTA_LIST_INCONSISTENT cpu_to_le32(0xC0000266)
+#define STATUS_FILE_IS_OFFLINE cpu_to_le32(0xC0000267)
+#define STATUS_EVALUATION_EXPIRATION cpu_to_le32(0xC0000268)
+#define STATUS_ILLEGAL_DLL_RELOCATION cpu_to_le32(0xC0000269)
+#define STATUS_LICENSE_VIOLATION cpu_to_le32(0xC000026A)
+#define STATUS_DLL_INIT_FAILED_LOGOFF cpu_to_le32(0xC000026B)
+#define STATUS_DRIVER_UNABLE_TO_LOAD cpu_to_le32(0xC000026C)
+#define STATUS_DFS_UNAVAILABLE cpu_to_le32(0xC000026D)
+#define STATUS_VOLUME_DISMOUNTED cpu_to_le32(0xC000026E)
+#define STATUS_WX86_INTERNAL_ERROR cpu_to_le32(0xC000026F)
+#define STATUS_WX86_FLOAT_STACK_CHECK cpu_to_le32(0xC0000270)
+#define STATUS_VALIDATE_CONTINUE cpu_to_le32(0xC0000271)
+#define STATUS_NO_MATCH cpu_to_le32(0xC0000272)
+#define STATUS_NO_MORE_MATCHES cpu_to_le32(0xC0000273)
+#define STATUS_NOT_A_REPARSE_POINT cpu_to_le32(0xC0000275)
+#define STATUS_IO_REPARSE_TAG_INVALID cpu_to_le32(0xC0000276)
+#define STATUS_IO_REPARSE_TAG_MISMATCH cpu_to_le32(0xC0000277)
+#define STATUS_IO_REPARSE_DATA_INVALID cpu_to_le32(0xC0000278)
+#define STATUS_IO_REPARSE_TAG_NOT_HANDLED cpu_to_le32(0xC0000279)
+#define STATUS_REPARSE_POINT_NOT_RESOLVED cpu_to_le32(0xC0000280)
+#define STATUS_DIRECTORY_IS_A_REPARSE_POINT cpu_to_le32(0xC0000281)
+#define STATUS_RANGE_LIST_CONFLICT cpu_to_le32(0xC0000282)
+#define STATUS_SOURCE_ELEMENT_EMPTY cpu_to_le32(0xC0000283)
+#define STATUS_DESTINATION_ELEMENT_FULL cpu_to_le32(0xC0000284)
+#define STATUS_ILLEGAL_ELEMENT_ADDRESS cpu_to_le32(0xC0000285)
+#define STATUS_MAGAZINE_NOT_PRESENT cpu_to_le32(0xC0000286)
+#define STATUS_REINITIALIZATION_NEEDED cpu_to_le32(0xC0000287)
+#define STATUS_ENCRYPTION_FAILED cpu_to_le32(0xC000028A)
+#define STATUS_DECRYPTION_FAILED cpu_to_le32(0xC000028B)
+#define STATUS_RANGE_NOT_FOUND cpu_to_le32(0xC000028C)
+#define STATUS_NO_RECOVERY_POLICY cpu_to_le32(0xC000028D)
+#define STATUS_NO_EFS cpu_to_le32(0xC000028E)
+#define STATUS_WRONG_EFS cpu_to_le32(0xC000028F)
+#define STATUS_NO_USER_KEYS cpu_to_le32(0xC0000290)
+#define STATUS_FILE_NOT_ENCRYPTED cpu_to_le32(0xC0000291)
+#define STATUS_NOT_EXPORT_FORMAT cpu_to_le32(0xC0000292)
+#define STATUS_FILE_ENCRYPTED cpu_to_le32(0xC0000293)
+#define STATUS_WMI_GUID_NOT_FOUND cpu_to_le32(0xC0000295)
+#define STATUS_WMI_INSTANCE_NOT_FOUND cpu_to_le32(0xC0000296)
+#define STATUS_WMI_ITEMID_NOT_FOUND cpu_to_le32(0xC0000297)
+#define STATUS_WMI_TRY_AGAIN cpu_to_le32(0xC0000298)
+#define STATUS_SHARED_POLICY cpu_to_le32(0xC0000299)
+#define STATUS_POLICY_OBJECT_NOT_FOUND cpu_to_le32(0xC000029A)
+#define STATUS_POLICY_ONLY_IN_DS cpu_to_le32(0xC000029B)
+#define STATUS_VOLUME_NOT_UPGRADED cpu_to_le32(0xC000029C)
+#define STATUS_REMOTE_STORAGE_NOT_ACTIVE cpu_to_le32(0xC000029D)
+#define STATUS_REMOTE_STORAGE_MEDIA_ERROR cpu_to_le32(0xC000029E)
+#define STATUS_NO_TRACKING_SERVICE cpu_to_le32(0xC000029F)
+#define STATUS_SERVER_SID_MISMATCH cpu_to_le32(0xC00002A0)
+#define STATUS_DS_NO_ATTRIBUTE_OR_VALUE cpu_to_le32(0xC00002A1)
+#define STATUS_DS_INVALID_ATTRIBUTE_SYNTAX cpu_to_le32(0xC00002A2)
+#define STATUS_DS_ATTRIBUTE_TYPE_UNDEFINED cpu_to_le32(0xC00002A3)
+#define STATUS_DS_ATTRIBUTE_OR_VALUE_EXISTS cpu_to_le32(0xC00002A4)
+#define STATUS_DS_BUSY cpu_to_le32(0xC00002A5)
+#define STATUS_DS_UNAVAILABLE cpu_to_le32(0xC00002A6)
+#define STATUS_DS_NO_RIDS_ALLOCATED cpu_to_le32(0xC00002A7)
+#define STATUS_DS_NO_MORE_RIDS cpu_to_le32(0xC00002A8)
+#define STATUS_DS_INCORRECT_ROLE_OWNER cpu_to_le32(0xC00002A9)
+#define STATUS_DS_RIDMGR_INIT_ERROR cpu_to_le32(0xC00002AA)
+#define STATUS_DS_OBJ_CLASS_VIOLATION cpu_to_le32(0xC00002AB)
+#define STATUS_DS_CANT_ON_NON_LEAF cpu_to_le32(0xC00002AC)
+#define STATUS_DS_CANT_ON_RDN cpu_to_le32(0xC00002AD)
+#define STATUS_DS_CANT_MOD_OBJ_CLASS cpu_to_le32(0xC00002AE)
+#define STATUS_DS_CROSS_DOM_MOVE_FAILED cpu_to_le32(0xC00002AF)
+#define STATUS_DS_GC_NOT_AVAILABLE cpu_to_le32(0xC00002B0)
+#define STATUS_DIRECTORY_SERVICE_REQUIRED cpu_to_le32(0xC00002B1)
+#define STATUS_REPARSE_ATTRIBUTE_CONFLICT cpu_to_le32(0xC00002B2)
+#define STATUS_CANT_ENABLE_DENY_ONLY cpu_to_le32(0xC00002B3)
+#define STATUS_FLOAT_MULTIPLE_FAULTS cpu_to_le32(0xC00002B4)
+#define STATUS_FLOAT_MULTIPLE_TRAPS cpu_to_le32(0xC00002B5)
+#define STATUS_DEVICE_REMOVED cpu_to_le32(0xC00002B6)
+#define STATUS_JOURNAL_DELETE_IN_PROGRESS cpu_to_le32(0xC00002B7)
+#define STATUS_JOURNAL_NOT_ACTIVE cpu_to_le32(0xC00002B8)
+#define STATUS_NOINTERFACE cpu_to_le32(0xC00002B9)
+#define STATUS_DS_ADMIN_LIMIT_EXCEEDED cpu_to_le32(0xC00002C1)
+#define STATUS_DRIVER_FAILED_SLEEP cpu_to_le32(0xC00002C2)
+#define STATUS_MUTUAL_AUTHENTICATION_FAILED cpu_to_le32(0xC00002C3)
+#define STATUS_CORRUPT_SYSTEM_FILE cpu_to_le32(0xC00002C4)
+#define STATUS_DATATYPE_MISALIGNMENT_ERROR cpu_to_le32(0xC00002C5)
+#define STATUS_WMI_READ_ONLY cpu_to_le32(0xC00002C6)
+#define STATUS_WMI_SET_FAILURE cpu_to_le32(0xC00002C7)
+#define STATUS_COMMITMENT_MINIMUM cpu_to_le32(0xC00002C8)
+#define STATUS_REG_NAT_CONSUMPTION cpu_to_le32(0xC00002C9)
+#define STATUS_TRANSPORT_FULL cpu_to_le32(0xC00002CA)
+#define STATUS_DS_SAM_INIT_FAILURE cpu_to_le32(0xC00002CB)
+#define STATUS_ONLY_IF_CONNECTED cpu_to_le32(0xC00002CC)
+#define STATUS_DS_SENSITIVE_GROUP_VIOLATION cpu_to_le32(0xC00002CD)
+#define STATUS_PNP_RESTART_ENUMERATION cpu_to_le32(0xC00002CE)
+#define STATUS_JOURNAL_ENTRY_DELETED cpu_to_le32(0xC00002CF)
+#define STATUS_DS_CANT_MOD_PRIMARYGROUPID cpu_to_le32(0xC00002D0)
+#define STATUS_SYSTEM_IMAGE_BAD_SIGNATURE cpu_to_le32(0xC00002D1)
+#define STATUS_PNP_REBOOT_REQUIRED cpu_to_le32(0xC00002D2)
+#define STATUS_POWER_STATE_INVALID cpu_to_le32(0xC00002D3)
+#define STATUS_DS_INVALID_GROUP_TYPE cpu_to_le32(0xC00002D4)
+#define STATUS_DS_NO_NEST_GLOBALGROUP_IN_MIXEDDOMAIN cpu_to_le32(0xC00002D5)
+#define STATUS_DS_NO_NEST_LOCALGROUP_IN_MIXEDDOMAIN cpu_to_le32(0xC00002D6)
+#define STATUS_DS_GLOBAL_CANT_HAVE_LOCAL_MEMBER cpu_to_le32(0xC00002D7)
+#define STATUS_DS_GLOBAL_CANT_HAVE_UNIVERSAL_MEMBER cpu_to_le32(0xC00002D8)
+#define STATUS_DS_UNIVERSAL_CANT_HAVE_LOCAL_MEMBER cpu_to_le32(0xC00002D9)
+#define STATUS_DS_GLOBAL_CANT_HAVE_CROSSDOMAIN_MEMBER cpu_to_le32(0xC00002DA)
+#define STATUS_DS_LOCAL_CANT_HAVE_CROSSDOMAIN_LOCAL_MEMBER cpu_to_le32(0xC00002DB)
+#define STATUS_DS_HAVE_PRIMARY_MEMBERS cpu_to_le32(0xC00002DC)
+#define STATUS_WMI_NOT_SUPPORTED cpu_to_le32(0xC00002DD)
+#define STATUS_INSUFFICIENT_POWER cpu_to_le32(0xC00002DE)
+#define STATUS_SAM_NEED_BOOTKEY_PASSWORD cpu_to_le32(0xC00002DF)
+#define STATUS_SAM_NEED_BOOTKEY_FLOPPY cpu_to_le32(0xC00002E0)
+#define STATUS_DS_CANT_START cpu_to_le32(0xC00002E1)
+#define STATUS_DS_INIT_FAILURE cpu_to_le32(0xC00002E2)
+#define STATUS_SAM_INIT_FAILURE cpu_to_le32(0xC00002E3)
+#define STATUS_DS_GC_REQUIRED cpu_to_le32(0xC00002E4)
+#define STATUS_DS_LOCAL_MEMBER_OF_LOCAL_ONLY cpu_to_le32(0xC00002E5)
+#define STATUS_DS_NO_FPO_IN_UNIVERSAL_GROUPS cpu_to_le32(0xC00002E6)
+#define STATUS_DS_MACHINE_ACCOUNT_QUOTA_EXCEEDED cpu_to_le32(0xC00002E7)
+#define STATUS_MULTIPLE_FAULT_VIOLATION cpu_to_le32(0xC00002E8)
+#define STATUS_CURRENT_DOMAIN_NOT_ALLOWED cpu_to_le32(0xC00002E9)
+#define STATUS_CANNOT_MAKE cpu_to_le32(0xC00002EA)
+#define STATUS_SYSTEM_SHUTDOWN cpu_to_le32(0xC00002EB)
+#define STATUS_DS_INIT_FAILURE_CONSOLE cpu_to_le32(0xC00002EC)
+#define STATUS_DS_SAM_INIT_FAILURE_CONSOLE cpu_to_le32(0xC00002ED)
+#define STATUS_UNFINISHED_CONTEXT_DELETED cpu_to_le32(0xC00002EE)
+#define STATUS_NO_TGT_REPLY cpu_to_le32(0xC00002EF)
+#define STATUS_OBJECTID_NOT_FOUND cpu_to_le32(0xC00002F0)
+#define STATUS_NO_IP_ADDRESSES cpu_to_le32(0xC00002F1)
+#define STATUS_WRONG_CREDENTIAL_HANDLE cpu_to_le32(0xC00002F2)
+#define STATUS_CRYPTO_SYSTEM_INVALID cpu_to_le32(0xC00002F3)
+#define STATUS_MAX_REFERRALS_EXCEEDED cpu_to_le32(0xC00002F4)
+#define STATUS_MUST_BE_KDC cpu_to_le32(0xC00002F5)
+#define STATUS_STRONG_CRYPTO_NOT_SUPPORTED cpu_to_le32(0xC00002F6)
+#define STATUS_TOO_MANY_PRINCIPALS cpu_to_le32(0xC00002F7)
+#define STATUS_NO_PA_DATA cpu_to_le32(0xC00002F8)
+#define STATUS_PKINIT_NAME_MISMATCH cpu_to_le32(0xC00002F9)
+#define STATUS_SMARTCARD_LOGON_REQUIRED cpu_to_le32(0xC00002FA)
+#define STATUS_KDC_INVALID_REQUEST cpu_to_le32(0xC00002FB)
+#define STATUS_KDC_UNABLE_TO_REFER cpu_to_le32(0xC00002FC)
+#define STATUS_KDC_UNKNOWN_ETYPE cpu_to_le32(0xC00002FD)
+#define STATUS_SHUTDOWN_IN_PROGRESS cpu_to_le32(0xC00002FE)
+#define STATUS_SERVER_SHUTDOWN_IN_PROGRESS cpu_to_le32(0xC00002FF)
+#define STATUS_NOT_SUPPORTED_ON_SBS cpu_to_le32(0xC0000300)
+#define STATUS_WMI_GUID_DISCONNECTED cpu_to_le32(0xC0000301)
+#define STATUS_WMI_ALREADY_DISABLED cpu_to_le32(0xC0000302)
+#define STATUS_WMI_ALREADY_ENABLED cpu_to_le32(0xC0000303)
+#define STATUS_MFT_TOO_FRAGMENTED cpu_to_le32(0xC0000304)
+#define STATUS_COPY_PROTECTION_FAILURE cpu_to_le32(0xC0000305)
+#define STATUS_CSS_AUTHENTICATION_FAILURE cpu_to_le32(0xC0000306)
+#define STATUS_CSS_KEY_NOT_PRESENT cpu_to_le32(0xC0000307)
+#define STATUS_CSS_KEY_NOT_ESTABLISHED cpu_to_le32(0xC0000308)
+#define STATUS_CSS_SCRAMBLED_SECTOR cpu_to_le32(0xC0000309)
+#define STATUS_CSS_REGION_MISMATCH cpu_to_le32(0xC000030A)
+#define STATUS_CSS_RESETS_EXHAUSTED cpu_to_le32(0xC000030B)
+#define STATUS_PKINIT_FAILURE cpu_to_le32(0xC0000320)
+#define STATUS_SMARTCARD_SUBSYSTEM_FAILURE cpu_to_le32(0xC0000321)
+#define STATUS_NO_KERB_KEY cpu_to_le32(0xC0000322)
+#define STATUS_HOST_DOWN cpu_to_le32(0xC0000350)
+#define STATUS_UNSUPPORTED_PREAUTH cpu_to_le32(0xC0000351)
+#define STATUS_EFS_ALG_BLOB_TOO_BIG cpu_to_le32(0xC0000352)
+#define STATUS_PORT_NOT_SET cpu_to_le32(0xC0000353)
+#define STATUS_DEBUGGER_INACTIVE cpu_to_le32(0xC0000354)
+#define STATUS_DS_VERSION_CHECK_FAILURE cpu_to_le32(0xC0000355)
+#define STATUS_AUDITING_DISABLED cpu_to_le32(0xC0000356)
+#define STATUS_PRENT4_MACHINE_ACCOUNT cpu_to_le32(0xC0000357)
+#define STATUS_DS_AG_CANT_HAVE_UNIVERSAL_MEMBER cpu_to_le32(0xC0000358)
+#define STATUS_INVALID_IMAGE_WIN_32 cpu_to_le32(0xC0000359)
+#define STATUS_INVALID_IMAGE_WIN_64 cpu_to_le32(0xC000035A)
+#define STATUS_BAD_BINDINGS cpu_to_le32(0xC000035B)
+#define STATUS_NETWORK_SESSION_EXPIRED cpu_to_le32(0xC000035C)
+#define STATUS_APPHELP_BLOCK cpu_to_le32(0xC000035D)
+#define STATUS_ALL_SIDS_FILTERED cpu_to_le32(0xC000035E)
+#define STATUS_NOT_SAFE_MODE_DRIVER cpu_to_le32(0xC000035F)
+#define STATUS_ACCESS_DISABLED_BY_POLICY_DEFAULT cpu_to_le32(0xC0000361)
+#define STATUS_ACCESS_DISABLED_BY_POLICY_PATH cpu_to_le32(0xC0000362)
+#define STATUS_ACCESS_DISABLED_BY_POLICY_PUBLISHER cpu_to_le32(0xC0000363)
+#define STATUS_ACCESS_DISABLED_BY_POLICY_OTHER cpu_to_le32(0xC0000364)
+#define STATUS_FAILED_DRIVER_ENTRY cpu_to_le32(0xC0000365)
+#define STATUS_DEVICE_ENUMERATION_ERROR cpu_to_le32(0xC0000366)
+#define STATUS_MOUNT_POINT_NOT_RESOLVED cpu_to_le32(0xC0000368)
+#define STATUS_INVALID_DEVICE_OBJECT_PARAMETER cpu_to_le32(0xC0000369)
+#define STATUS_MCA_OCCURED cpu_to_le32(0xC000036A)
+#define STATUS_DRIVER_BLOCKED_CRITICAL cpu_to_le32(0xC000036B)
+#define STATUS_DRIVER_BLOCKED cpu_to_le32(0xC000036C)
+#define STATUS_DRIVER_DATABASE_ERROR cpu_to_le32(0xC000036D)
+#define STATUS_SYSTEM_HIVE_TOO_LARGE cpu_to_le32(0xC000036E)
+#define STATUS_INVALID_IMPORT_OF_NON_DLL cpu_to_le32(0xC000036F)
+#define STATUS_NO_SECRETS cpu_to_le32(0xC0000371)
+#define STATUS_ACCESS_DISABLED_NO_SAFER_UI_BY_POLICY cpu_to_le32(0xC0000372)
+#define STATUS_FAILED_STACK_SWITCH cpu_to_le32(0xC0000373)
+#define STATUS_HEAP_CORRUPTION cpu_to_le32(0xC0000374)
+#define STATUS_SMARTCARD_WRONG_PIN cpu_to_le32(0xC0000380)
+#define STATUS_SMARTCARD_CARD_BLOCKED cpu_to_le32(0xC0000381)
+#define STATUS_SMARTCARD_CARD_NOT_AUTHENTICATED cpu_to_le32(0xC0000382)
+#define STATUS_SMARTCARD_NO_CARD cpu_to_le32(0xC0000383)
+#define STATUS_SMARTCARD_NO_KEY_CONTAINER cpu_to_le32(0xC0000384)
+#define STATUS_SMARTCARD_NO_CERTIFICATE cpu_to_le32(0xC0000385)
+#define STATUS_SMARTCARD_NO_KEYSET cpu_to_le32(0xC0000386)
+#define STATUS_SMARTCARD_IO_ERROR cpu_to_le32(0xC0000387)
+#define STATUS_DOWNGRADE_DETECTED cpu_to_le32(0xC0000388)
+#define STATUS_SMARTCARD_CERT_REVOKED cpu_to_le32(0xC0000389)
+#define STATUS_ISSUING_CA_UNTRUSTED cpu_to_le32(0xC000038A)
+#define STATUS_REVOCATION_OFFLINE_C cpu_to_le32(0xC000038B)
+#define STATUS_PKINIT_CLIENT_FAILURE cpu_to_le32(0xC000038C)
+#define STATUS_SMARTCARD_CERT_EXPIRED cpu_to_le32(0xC000038D)
+#define STATUS_DRIVER_FAILED_PRIOR_UNLOAD cpu_to_le32(0xC000038E)
+#define STATUS_SMARTCARD_SILENT_CONTEXT cpu_to_le32(0xC000038F)
+#define STATUS_PER_USER_TRUST_QUOTA_EXCEEDED cpu_to_le32(0xC0000401)
+#define STATUS_ALL_USER_TRUST_QUOTA_EXCEEDED cpu_to_le32(0xC0000402)
+#define STATUS_USER_DELETE_TRUST_QUOTA_EXCEEDED cpu_to_le32(0xC0000403)
+#define STATUS_DS_NAME_NOT_UNIQUE cpu_to_le32(0xC0000404)
+#define STATUS_DS_DUPLICATE_ID_FOUND cpu_to_le32(0xC0000405)
+#define STATUS_DS_GROUP_CONVERSION_ERROR cpu_to_le32(0xC0000406)
+#define STATUS_VOLSNAP_PREPARE_HIBERNATE cpu_to_le32(0xC0000407)
+#define STATUS_USER2USER_REQUIRED cpu_to_le32(0xC0000408)
+#define STATUS_STACK_BUFFER_OVERRUN cpu_to_le32(0xC0000409)
+#define STATUS_NO_S4U_PROT_SUPPORT cpu_to_le32(0xC000040A)
+#define STATUS_CROSSREALM_DELEGATION_FAILURE cpu_to_le32(0xC000040B)
+#define STATUS_REVOCATION_OFFLINE_KDC cpu_to_le32(0xC000040C)
+#define STATUS_ISSUING_CA_UNTRUSTED_KDC cpu_to_le32(0xC000040D)
+#define STATUS_KDC_CERT_EXPIRED cpu_to_le32(0xC000040E)
+#define STATUS_KDC_CERT_REVOKED cpu_to_le32(0xC000040F)
+#define STATUS_PARAMETER_QUOTA_EXCEEDED cpu_to_le32(0xC0000410)
+#define STATUS_HIBERNATION_FAILURE cpu_to_le32(0xC0000411)
+#define STATUS_DELAY_LOAD_FAILED cpu_to_le32(0xC0000412)
+#define STATUS_AUTHENTICATION_FIREWALL_FAILED cpu_to_le32(0xC0000413)
+#define STATUS_VDM_DISALLOWED cpu_to_le32(0xC0000414)
+#define STATUS_HUNG_DISPLAY_DRIVER_THREAD cpu_to_le32(0xC0000415)
+#define STATUS_INSUFFICIENT_RESOURCE_FOR_SPECIFIED_SHARED_SECTION_SIZE cpu_to_le32(0xC0000416)
+#define STATUS_INVALID_CRUNTIME_PARAMETER cpu_to_le32(0xC0000417)
+#define STATUS_NTLM_BLOCKED cpu_to_le32(0xC0000418)
+#define STATUS_ASSERTION_FAILURE cpu_to_le32(0xC0000420)
+#define STATUS_VERIFIER_STOP cpu_to_le32(0xC0000421)
+#define STATUS_CALLBACK_POP_STACK cpu_to_le32(0xC0000423)
+#define STATUS_INCOMPATIBLE_DRIVER_BLOCKED cpu_to_le32(0xC0000424)
+#define STATUS_HIVE_UNLOADED cpu_to_le32(0xC0000425)
+#define STATUS_COMPRESSION_DISABLED cpu_to_le32(0xC0000426)
+#define STATUS_FILE_SYSTEM_LIMITATION cpu_to_le32(0xC0000427)
+#define STATUS_INVALID_IMAGE_HASH cpu_to_le32(0xC0000428)
+#define STATUS_NOT_CAPABLE cpu_to_le32(0xC0000429)
+#define STATUS_REQUEST_OUT_OF_SEQUENCE cpu_to_le32(0xC000042A)
+#define STATUS_IMPLEMENTATION_LIMIT cpu_to_le32(0xC000042B)
+#define STATUS_ELEVATION_REQUIRED cpu_to_le32(0xC000042C)
+#define STATUS_BEYOND_VDL cpu_to_le32(0xC0000432)
+#define STATUS_ENCOUNTERED_WRITE_IN_PROGRESS cpu_to_le32(0xC0000433)
+#define STATUS_PTE_CHANGED cpu_to_le32(0xC0000434)
+#define STATUS_PURGE_FAILED cpu_to_le32(0xC0000435)
+#define STATUS_CRED_REQUIRES_CONFIRMATION cpu_to_le32(0xC0000440)
+#define STATUS_CS_ENCRYPTION_INVALID_SERVER_RESPONSE cpu_to_le32(0xC0000441)
+#define STATUS_CS_ENCRYPTION_UNSUPPORTED_SERVER cpu_to_le32(0xC0000442)
+#define STATUS_CS_ENCRYPTION_EXISTING_ENCRYPTED_FILE cpu_to_le32(0xC0000443)
+#define STATUS_CS_ENCRYPTION_NEW_ENCRYPTED_FILE cpu_to_le32(0xC0000444)
+#define STATUS_CS_ENCRYPTION_FILE_NOT_CSE cpu_to_le32(0xC0000445)
+#define STATUS_INVALID_LABEL cpu_to_le32(0xC0000446)
+#define STATUS_DRIVER_PROCESS_TERMINATED cpu_to_le32(0xC0000450)
+#define STATUS_AMBIGUOUS_SYSTEM_DEVICE cpu_to_le32(0xC0000451)
+#define STATUS_SYSTEM_DEVICE_NOT_FOUND cpu_to_le32(0xC0000452)
+#define STATUS_RESTART_BOOT_APPLICATION cpu_to_le32(0xC0000453)
+#define STATUS_INVALID_TASK_NAME cpu_to_le32(0xC0000500)
+#define STATUS_INVALID_TASK_INDEX cpu_to_le32(0xC0000501)
+#define STATUS_THREAD_ALREADY_IN_TASK cpu_to_le32(0xC0000502)
+#define STATUS_CALLBACK_BYPASS cpu_to_le32(0xC0000503)
+#define STATUS_PORT_CLOSED cpu_to_le32(0xC0000700)
+#define STATUS_MESSAGE_LOST cpu_to_le32(0xC0000701)
+#define STATUS_INVALID_MESSAGE cpu_to_le32(0xC0000702)
+#define STATUS_REQUEST_CANCELED cpu_to_le32(0xC0000703)
+#define STATUS_RECURSIVE_DISPATCH cpu_to_le32(0xC0000704)
+#define STATUS_LPC_RECEIVE_BUFFER_EXPECTED cpu_to_le32(0xC0000705)
+#define STATUS_LPC_INVALID_CONNECTION_USAGE cpu_to_le32(0xC0000706)
+#define STATUS_LPC_REQUESTS_NOT_ALLOWED cpu_to_le32(0xC0000707)
+#define STATUS_RESOURCE_IN_USE cpu_to_le32(0xC0000708)
+#define STATUS_HARDWARE_MEMORY_ERROR cpu_to_le32(0xC0000709)
+#define STATUS_THREADPOOL_HANDLE_EXCEPTION cpu_to_le32(0xC000070A)
+#define STATUS_THREADPOOL_SET_EVENT_ON_COMPLETION_FAILED cpu_to_le32(0xC000070B)
+#define STATUS_THREADPOOL_RELEASE_SEMAPHORE_ON_COMPLETION_FAILED cpu_to_le32(0xC000070C)
+#define STATUS_THREADPOOL_RELEASE_MUTEX_ON_COMPLETION_FAILED cpu_to_le32(0xC000070D)
+#define STATUS_THREADPOOL_FREE_LIBRARY_ON_COMPLETION_FAILED cpu_to_le32(0xC000070E)
+#define STATUS_THREADPOOL_RELEASED_DURING_OPERATION cpu_to_le32(0xC000070F)
+#define STATUS_CALLBACK_RETURNED_WHILE_IMPERSONATING cpu_to_le32(0xC0000710)
+#define STATUS_APC_RETURNED_WHILE_IMPERSONATING cpu_to_le32(0xC0000711)
+#define STATUS_PROCESS_IS_PROTECTED cpu_to_le32(0xC0000712)
+#define STATUS_MCA_EXCEPTION cpu_to_le32(0xC0000713)
+#define STATUS_CERTIFICATE_MAPPING_NOT_UNIQUE cpu_to_le32(0xC0000714)
+#define STATUS_SYMLINK_CLASS_DISABLED cpu_to_le32(0xC0000715)
+#define STATUS_INVALID_IDN_NORMALIZATION cpu_to_le32(0xC0000716)
+#define STATUS_NO_UNICODE_TRANSLATION cpu_to_le32(0xC0000717)
+#define STATUS_ALREADY_REGISTERED cpu_to_le32(0xC0000718)
+#define STATUS_CONTEXT_MISMATCH cpu_to_le32(0xC0000719)
+#define STATUS_PORT_ALREADY_HAS_COMPLETION_LIST cpu_to_le32(0xC000071A)
+#define STATUS_CALLBACK_RETURNED_THREAD_PRIORITY cpu_to_le32(0xC000071B)
+#define STATUS_INVALID_THREAD cpu_to_le32(0xC000071C)
+#define STATUS_CALLBACK_RETURNED_TRANSACTION cpu_to_le32(0xC000071D)
+#define STATUS_CALLBACK_RETURNED_LDR_LOCK cpu_to_le32(0xC000071E)
+#define STATUS_CALLBACK_RETURNED_LANG cpu_to_le32(0xC000071F)
+#define STATUS_CALLBACK_RETURNED_PRI_BACK cpu_to_le32(0xC0000720)
+#define STATUS_CALLBACK_RETURNED_THREAD_AFFINITY cpu_to_le32(0xC0000721)
+#define STATUS_DISK_REPAIR_DISABLED cpu_to_le32(0xC0000800)
+#define STATUS_DS_DOMAIN_RENAME_IN_PROGRESS cpu_to_le32(0xC0000801)
+#define STATUS_DISK_QUOTA_EXCEEDED cpu_to_le32(0xC0000802)
+#define STATUS_CONTENT_BLOCKED cpu_to_le32(0xC0000804)
+#define STATUS_BAD_CLUSTERS cpu_to_le32(0xC0000805)
+#define STATUS_VOLUME_DIRTY cpu_to_le32(0xC0000806)
+#define STATUS_FILE_CHECKED_OUT cpu_to_le32(0xC0000901)
+#define STATUS_CHECKOUT_REQUIRED cpu_to_le32(0xC0000902)
+#define STATUS_BAD_FILE_TYPE cpu_to_le32(0xC0000903)
+#define STATUS_FILE_TOO_LARGE cpu_to_le32(0xC0000904)
+#define STATUS_FORMS_AUTH_REQUIRED cpu_to_le32(0xC0000905)
+#define STATUS_VIRUS_INFECTED cpu_to_le32(0xC0000906)
+#define STATUS_VIRUS_DELETED cpu_to_le32(0xC0000907)
+#define STATUS_BAD_MCFG_TABLE cpu_to_le32(0xC0000908)
+#define STATUS_WOW_ASSERTION cpu_to_le32(0xC0009898)
+#define STATUS_INVALID_SIGNATURE cpu_to_le32(0xC000A000)
+#define STATUS_HMAC_NOT_SUPPORTED cpu_to_le32(0xC000A001)
+#define STATUS_IPSEC_QUEUE_OVERFLOW cpu_to_le32(0xC000A010)
+#define STATUS_ND_QUEUE_OVERFLOW cpu_to_le32(0xC000A011)
+#define STATUS_HOPLIMIT_EXCEEDED cpu_to_le32(0xC000A012)
+#define STATUS_PROTOCOL_NOT_SUPPORTED cpu_to_le32(0xC000A013)
+#define STATUS_LOST_WRITEBEHIND_DATA_NETWORK_DISCONNECTED cpu_to_le32(0xC000A080)
+#define STATUS_LOST_WRITEBEHIND_DATA_NETWORK_SERVER_ERROR cpu_to_le32(0xC000A081)
+#define STATUS_LOST_WRITEBEHIND_DATA_LOCAL_DISK_ERROR cpu_to_le32(0xC000A082)
+#define STATUS_XML_PARSE_ERROR cpu_to_le32(0xC000A083)
+#define STATUS_XMLDSIG_ERROR cpu_to_le32(0xC000A084)
+#define STATUS_WRONG_COMPARTMENT cpu_to_le32(0xC000A085)
+#define STATUS_AUTHIP_FAILURE cpu_to_le32(0xC000A086)
+#define DBG_NO_STATE_CHANGE cpu_to_le32(0xC0010001)
+#define DBG_APP_NOT_IDLE cpu_to_le32(0xC0010002)
+#define RPC_NT_INVALID_STRING_BINDING cpu_to_le32(0xC0020001)
+#define RPC_NT_WRONG_KIND_OF_BINDING cpu_to_le32(0xC0020002)
+#define RPC_NT_INVALID_BINDING cpu_to_le32(0xC0020003)
+#define RPC_NT_PROTSEQ_NOT_SUPPORTED cpu_to_le32(0xC0020004)
+#define RPC_NT_INVALID_RPC_PROTSEQ cpu_to_le32(0xC0020005)
+#define RPC_NT_INVALID_STRING_UUID cpu_to_le32(0xC0020006)
+#define RPC_NT_INVALID_ENDPOINT_FORMAT cpu_to_le32(0xC0020007)
+#define RPC_NT_INVALID_NET_ADDR cpu_to_le32(0xC0020008)
+#define RPC_NT_NO_ENDPOINT_FOUND cpu_to_le32(0xC0020009)
+#define RPC_NT_INVALID_TIMEOUT cpu_to_le32(0xC002000A)
+#define RPC_NT_OBJECT_NOT_FOUND cpu_to_le32(0xC002000B)
+#define RPC_NT_ALREADY_REGISTERED cpu_to_le32(0xC002000C)
+#define RPC_NT_TYPE_ALREADY_REGISTERED cpu_to_le32(0xC002000D)
+#define RPC_NT_ALREADY_LISTENING cpu_to_le32(0xC002000E)
+#define RPC_NT_NO_PROTSEQS_REGISTERED cpu_to_le32(0xC002000F)
+#define RPC_NT_NOT_LISTENING cpu_to_le32(0xC0020010)
+#define RPC_NT_UNKNOWN_MGR_TYPE cpu_to_le32(0xC0020011)
+#define RPC_NT_UNKNOWN_IF cpu_to_le32(0xC0020012)
+#define RPC_NT_NO_BINDINGS cpu_to_le32(0xC0020013)
+#define RPC_NT_NO_PROTSEQS cpu_to_le32(0xC0020014)
+#define RPC_NT_CANT_CREATE_ENDPOINT cpu_to_le32(0xC0020015)
+#define RPC_NT_OUT_OF_RESOURCES cpu_to_le32(0xC0020016)
+#define RPC_NT_SERVER_UNAVAILABLE cpu_to_le32(0xC0020017)
+#define RPC_NT_SERVER_TOO_BUSY cpu_to_le32(0xC0020018)
+#define RPC_NT_INVALID_NETWORK_OPTIONS cpu_to_le32(0xC0020019)
+#define RPC_NT_NO_CALL_ACTIVE cpu_to_le32(0xC002001A)
+#define RPC_NT_CALL_FAILED cpu_to_le32(0xC002001B)
+#define RPC_NT_CALL_FAILED_DNE cpu_to_le32(0xC002001C)
+#define RPC_NT_PROTOCOL_ERROR cpu_to_le32(0xC002001D)
+#define RPC_NT_UNSUPPORTED_TRANS_SYN cpu_to_le32(0xC002001F)
+#define RPC_NT_UNSUPPORTED_TYPE cpu_to_le32(0xC0020021)
+#define RPC_NT_INVALID_TAG cpu_to_le32(0xC0020022)
+#define RPC_NT_INVALID_BOUND cpu_to_le32(0xC0020023)
+#define RPC_NT_NO_ENTRY_NAME cpu_to_le32(0xC0020024)
+#define RPC_NT_INVALID_NAME_SYNTAX cpu_to_le32(0xC0020025)
+#define RPC_NT_UNSUPPORTED_NAME_SYNTAX cpu_to_le32(0xC0020026)
+#define RPC_NT_UUID_NO_ADDRESS cpu_to_le32(0xC0020028)
+#define RPC_NT_DUPLICATE_ENDPOINT cpu_to_le32(0xC0020029)
+#define RPC_NT_UNKNOWN_AUTHN_TYPE cpu_to_le32(0xC002002A)
+#define RPC_NT_MAX_CALLS_TOO_SMALL cpu_to_le32(0xC002002B)
+#define RPC_NT_STRING_TOO_LONG cpu_to_le32(0xC002002C)
+#define RPC_NT_PROTSEQ_NOT_FOUND cpu_to_le32(0xC002002D)
+#define RPC_NT_PROCNUM_OUT_OF_RANGE cpu_to_le32(0xC002002E)
+#define RPC_NT_BINDING_HAS_NO_AUTH cpu_to_le32(0xC002002F)
+#define RPC_NT_UNKNOWN_AUTHN_SERVICE cpu_to_le32(0xC0020030)
+#define RPC_NT_UNKNOWN_AUTHN_LEVEL cpu_to_le32(0xC0020031)
+#define RPC_NT_INVALID_AUTH_IDENTITY cpu_to_le32(0xC0020032)
+#define RPC_NT_UNKNOWN_AUTHZ_SERVICE cpu_to_le32(0xC0020033)
+#define EPT_NT_INVALID_ENTRY cpu_to_le32(0xC0020034)
+#define EPT_NT_CANT_PERFORM_OP cpu_to_le32(0xC0020035)
+#define EPT_NT_NOT_REGISTERED cpu_to_le32(0xC0020036)
+#define RPC_NT_NOTHING_TO_EXPORT cpu_to_le32(0xC0020037)
+#define RPC_NT_INCOMPLETE_NAME cpu_to_le32(0xC0020038)
+#define RPC_NT_INVALID_VERS_OPTION cpu_to_le32(0xC0020039)
+#define RPC_NT_NO_MORE_MEMBERS cpu_to_le32(0xC002003A)
+#define RPC_NT_NOT_ALL_OBJS_UNEXPORTED cpu_to_le32(0xC002003B)
+#define RPC_NT_INTERFACE_NOT_FOUND cpu_to_le32(0xC002003C)
+#define RPC_NT_ENTRY_ALREADY_EXISTS cpu_to_le32(0xC002003D)
+#define RPC_NT_ENTRY_NOT_FOUND cpu_to_le32(0xC002003E)
+#define RPC_NT_NAME_SERVICE_UNAVAILABLE cpu_to_le32(0xC002003F)
+#define RPC_NT_INVALID_NAF_ID cpu_to_le32(0xC0020040)
+#define RPC_NT_CANNOT_SUPPORT cpu_to_le32(0xC0020041)
+#define RPC_NT_NO_CONTEXT_AVAILABLE cpu_to_le32(0xC0020042)
+#define RPC_NT_INTERNAL_ERROR cpu_to_le32(0xC0020043)
+#define RPC_NT_ZERO_DIVIDE cpu_to_le32(0xC0020044)
+#define RPC_NT_ADDRESS_ERROR cpu_to_le32(0xC0020045)
+#define RPC_NT_FP_DIV_ZERO cpu_to_le32(0xC0020046)
+#define RPC_NT_FP_UNDERFLOW cpu_to_le32(0xC0020047)
+#define RPC_NT_FP_OVERFLOW cpu_to_le32(0xC0020048)
+#define RPC_NT_CALL_IN_PROGRESS cpu_to_le32(0xC0020049)
+#define RPC_NT_NO_MORE_BINDINGS cpu_to_le32(0xC002004A)
+#define RPC_NT_GROUP_MEMBER_NOT_FOUND cpu_to_le32(0xC002004B)
+#define EPT_NT_CANT_CREATE cpu_to_le32(0xC002004C)
+#define RPC_NT_INVALID_OBJECT cpu_to_le32(0xC002004D)
+#define RPC_NT_NO_INTERFACES cpu_to_le32(0xC002004F)
+#define RPC_NT_CALL_CANCELLED cpu_to_le32(0xC0020050)
+#define RPC_NT_BINDING_INCOMPLETE cpu_to_le32(0xC0020051)
+#define RPC_NT_COMM_FAILURE cpu_to_le32(0xC0020052)
+#define RPC_NT_UNSUPPORTED_AUTHN_LEVEL cpu_to_le32(0xC0020053)
+#define RPC_NT_NO_PRINC_NAME cpu_to_le32(0xC0020054)
+#define RPC_NT_NOT_RPC_ERROR cpu_to_le32(0xC0020055)
+#define RPC_NT_SEC_PKG_ERROR cpu_to_le32(0xC0020057)
+#define RPC_NT_NOT_CANCELLED cpu_to_le32(0xC0020058)
+#define RPC_NT_INVALID_ASYNC_HANDLE cpu_to_le32(0xC0020062)
+#define RPC_NT_INVALID_ASYNC_CALL cpu_to_le32(0xC0020063)
+#define RPC_NT_PROXY_ACCESS_DENIED cpu_to_le32(0xC0020064)
+#define RPC_NT_NO_MORE_ENTRIES cpu_to_le32(0xC0030001)
+#define RPC_NT_SS_CHAR_TRANS_OPEN_FAIL cpu_to_le32(0xC0030002)
+#define RPC_NT_SS_CHAR_TRANS_SHORT_FILE cpu_to_le32(0xC0030003)
+#define RPC_NT_SS_IN_NULL_CONTEXT cpu_to_le32(0xC0030004)
+#define RPC_NT_SS_CONTEXT_MISMATCH cpu_to_le32(0xC0030005)
+#define RPC_NT_SS_CONTEXT_DAMAGED cpu_to_le32(0xC0030006)
+#define RPC_NT_SS_HANDLES_MISMATCH cpu_to_le32(0xC0030007)
+#define RPC_NT_SS_CANNOT_GET_CALL_HANDLE cpu_to_le32(0xC0030008)
+#define RPC_NT_NULL_REF_POINTER cpu_to_le32(0xC0030009)
+#define RPC_NT_ENUM_VALUE_OUT_OF_RANGE cpu_to_le32(0xC003000A)
+#define RPC_NT_BYTE_COUNT_TOO_SMALL cpu_to_le32(0xC003000B)
+#define RPC_NT_BAD_STUB_DATA cpu_to_le32(0xC003000C)
+#define RPC_NT_INVALID_ES_ACTION cpu_to_le32(0xC0030059)
+#define RPC_NT_WRONG_ES_VERSION cpu_to_le32(0xC003005A)
+#define RPC_NT_WRONG_STUB_VERSION cpu_to_le32(0xC003005B)
+#define RPC_NT_INVALID_PIPE_OBJECT cpu_to_le32(0xC003005C)
+#define RPC_NT_INVALID_PIPE_OPERATION cpu_to_le32(0xC003005D)
+#define RPC_NT_WRONG_PIPE_VERSION cpu_to_le32(0xC003005E)
+#define RPC_NT_PIPE_CLOSED cpu_to_le32(0xC003005F)
+#define RPC_NT_PIPE_DISCIPLINE_ERROR cpu_to_le32(0xC0030060)
+#define RPC_NT_PIPE_EMPTY cpu_to_le32(0xC0030061)
+#define STATUS_PNP_BAD_MPS_TABLE cpu_to_le32(0xC0040035)
+#define STATUS_PNP_TRANSLATION_FAILED cpu_to_le32(0xC0040036)
+#define STATUS_PNP_IRQ_TRANSLATION_FAILED cpu_to_le32(0xC0040037)
+#define STATUS_PNP_INVALID_ID cpu_to_le32(0xC0040038)
+#define STATUS_IO_REISSUE_AS_CACHED cpu_to_le32(0xC0040039)
+#define STATUS_CTX_WINSTATION_NAME_INVALID cpu_to_le32(0xC00A0001)
+#define STATUS_CTX_INVALID_PD cpu_to_le32(0xC00A0002)
+#define STATUS_CTX_PD_NOT_FOUND cpu_to_le32(0xC00A0003)
+#define STATUS_CTX_CLOSE_PENDING cpu_to_le32(0xC00A0006)
+#define STATUS_CTX_NO_OUTBUF cpu_to_le32(0xC00A0007)
+#define STATUS_CTX_MODEM_INF_NOT_FOUND cpu_to_le32(0xC00A0008)
+#define STATUS_CTX_INVALID_MODEMNAME cpu_to_le32(0xC00A0009)
+#define STATUS_CTX_RESPONSE_ERROR cpu_to_le32(0xC00A000A)
+#define STATUS_CTX_MODEM_RESPONSE_TIMEOUT cpu_to_le32(0xC00A000B)
+#define STATUS_CTX_MODEM_RESPONSE_NO_CARRIER cpu_to_le32(0xC00A000C)
+#define STATUS_CTX_MODEM_RESPONSE_NO_DIALTONE cpu_to_le32(0xC00A000D)
+#define STATUS_CTX_MODEM_RESPONSE_BUSY cpu_to_le32(0xC00A000E)
+#define STATUS_CTX_MODEM_RESPONSE_VOICE cpu_to_le32(0xC00A000F)
+#define STATUS_CTX_TD_ERROR cpu_to_le32(0xC00A0010)
+#define STATUS_CTX_LICENSE_CLIENT_INVALID cpu_to_le32(0xC00A0012)
+#define STATUS_CTX_LICENSE_NOT_AVAILABLE cpu_to_le32(0xC00A0013)
+#define STATUS_CTX_LICENSE_EXPIRED cpu_to_le32(0xC00A0014)
+#define STATUS_CTX_WINSTATION_NOT_FOUND cpu_to_le32(0xC00A0015)
+#define STATUS_CTX_WINSTATION_NAME_COLLISION cpu_to_le32(0xC00A0016)
+#define STATUS_CTX_WINSTATION_BUSY cpu_to_le32(0xC00A0017)
+#define STATUS_CTX_BAD_VIDEO_MODE cpu_to_le32(0xC00A0018)
+#define STATUS_CTX_GRAPHICS_INVALID cpu_to_le32(0xC00A0022)
+#define STATUS_CTX_NOT_CONSOLE cpu_to_le32(0xC00A0024)
+#define STATUS_CTX_CLIENT_QUERY_TIMEOUT cpu_to_le32(0xC00A0026)
+#define STATUS_CTX_CONSOLE_DISCONNECT cpu_to_le32(0xC00A0027)
+#define STATUS_CTX_CONSOLE_CONNECT cpu_to_le32(0xC00A0028)
+#define STATUS_CTX_SHADOW_DENIED cpu_to_le32(0xC00A002A)
+#define STATUS_CTX_WINSTATION_ACCESS_DENIED cpu_to_le32(0xC00A002B)
+#define STATUS_CTX_INVALID_WD cpu_to_le32(0xC00A002E)
+#define STATUS_CTX_WD_NOT_FOUND cpu_to_le32(0xC00A002F)
+#define STATUS_CTX_SHADOW_INVALID cpu_to_le32(0xC00A0030)
+#define STATUS_CTX_SHADOW_DISABLED cpu_to_le32(0xC00A0031)
+#define STATUS_RDP_PROTOCOL_ERROR cpu_to_le32(0xC00A0032)
+#define STATUS_CTX_CLIENT_LICENSE_NOT_SET cpu_to_le32(0xC00A0033)
+#define STATUS_CTX_CLIENT_LICENSE_IN_USE cpu_to_le32(0xC00A0034)
+#define STATUS_CTX_SHADOW_ENDED_BY_MODE_CHANGE cpu_to_le32(0xC00A0035)
+#define STATUS_CTX_SHADOW_NOT_RUNNING cpu_to_le32(0xC00A0036)
+#define STATUS_CTX_LOGON_DISABLED cpu_to_le32(0xC00A0037)
+#define STATUS_CTX_SECURITY_LAYER_ERROR cpu_to_le32(0xC00A0038)
+#define STATUS_TS_INCOMPATIBLE_SESSIONS cpu_to_le32(0xC00A0039)
+#define STATUS_MUI_FILE_NOT_FOUND cpu_to_le32(0xC00B0001)
+#define STATUS_MUI_INVALID_FILE cpu_to_le32(0xC00B0002)
+#define STATUS_MUI_INVALID_RC_CONFIG cpu_to_le32(0xC00B0003)
+#define STATUS_MUI_INVALID_LOCALE_NAME cpu_to_le32(0xC00B0004)
+#define STATUS_MUI_INVALID_ULTIMATEFALLBACK_NAME cpu_to_le32(0xC00B0005)
+#define STATUS_MUI_FILE_NOT_LOADED cpu_to_le32(0xC00B0006)
+#define STATUS_RESOURCE_ENUM_USER_STOP cpu_to_le32(0xC00B0007)
+#define STATUS_CLUSTER_INVALID_NODE cpu_to_le32(0xC0130001)
+#define STATUS_CLUSTER_NODE_EXISTS cpu_to_le32(0xC0130002)
+#define STATUS_CLUSTER_JOIN_IN_PROGRESS cpu_to_le32(0xC0130003)
+#define STATUS_CLUSTER_NODE_NOT_FOUND cpu_to_le32(0xC0130004)
+#define STATUS_CLUSTER_LOCAL_NODE_NOT_FOUND cpu_to_le32(0xC0130005)
+#define STATUS_CLUSTER_NETWORK_EXISTS cpu_to_le32(0xC0130006)
+#define STATUS_CLUSTER_NETWORK_NOT_FOUND cpu_to_le32(0xC0130007)
+#define STATUS_CLUSTER_NETINTERFACE_EXISTS cpu_to_le32(0xC0130008)
+#define STATUS_CLUSTER_NETINTERFACE_NOT_FOUND cpu_to_le32(0xC0130009)
+#define STATUS_CLUSTER_INVALID_REQUEST cpu_to_le32(0xC013000A)
+#define STATUS_CLUSTER_INVALID_NETWORK_PROVIDER cpu_to_le32(0xC013000B)
+#define STATUS_CLUSTER_NODE_DOWN cpu_to_le32(0xC013000C)
+#define STATUS_CLUSTER_NODE_UNREACHABLE cpu_to_le32(0xC013000D)
+#define STATUS_CLUSTER_NODE_NOT_MEMBER cpu_to_le32(0xC013000E)
+#define STATUS_CLUSTER_JOIN_NOT_IN_PROGRESS cpu_to_le32(0xC013000F)
+#define STATUS_CLUSTER_INVALID_NETWORK cpu_to_le32(0xC0130010)
+#define STATUS_CLUSTER_NO_NET_ADAPTERS cpu_to_le32(0xC0130011)
+#define STATUS_CLUSTER_NODE_UP cpu_to_le32(0xC0130012)
+#define STATUS_CLUSTER_NODE_PAUSED cpu_to_le32(0xC0130013)
+#define STATUS_CLUSTER_NODE_NOT_PAUSED cpu_to_le32(0xC0130014)
+#define STATUS_CLUSTER_NO_SECURITY_CONTEXT cpu_to_le32(0xC0130015)
+#define STATUS_CLUSTER_NETWORK_NOT_INTERNAL cpu_to_le32(0xC0130016)
+#define STATUS_CLUSTER_POISONED cpu_to_le32(0xC0130017)
+#define STATUS_ACPI_INVALID_OPCODE cpu_to_le32(0xC0140001)
+#define STATUS_ACPI_STACK_OVERFLOW cpu_to_le32(0xC0140002)
+#define STATUS_ACPI_ASSERT_FAILED cpu_to_le32(0xC0140003)
+#define STATUS_ACPI_INVALID_INDEX cpu_to_le32(0xC0140004)
+#define STATUS_ACPI_INVALID_ARGUMENT cpu_to_le32(0xC0140005)
+#define STATUS_ACPI_FATAL cpu_to_le32(0xC0140006)
+#define STATUS_ACPI_INVALID_SUPERNAME cpu_to_le32(0xC0140007)
+#define STATUS_ACPI_INVALID_ARGTYPE cpu_to_le32(0xC0140008)
+#define STATUS_ACPI_INVALID_OBJTYPE cpu_to_le32(0xC0140009)
+#define STATUS_ACPI_INVALID_TARGETTYPE cpu_to_le32(0xC014000A)
+#define STATUS_ACPI_INCORRECT_ARGUMENT_COUNT cpu_to_le32(0xC014000B)
+#define STATUS_ACPI_ADDRESS_NOT_MAPPED cpu_to_le32(0xC014000C)
+#define STATUS_ACPI_INVALID_EVENTTYPE cpu_to_le32(0xC014000D)
+#define STATUS_ACPI_HANDLER_COLLISION cpu_to_le32(0xC014000E)
+#define STATUS_ACPI_INVALID_DATA cpu_to_le32(0xC014000F)
+#define STATUS_ACPI_INVALID_REGION cpu_to_le32(0xC0140010)
+#define STATUS_ACPI_INVALID_ACCESS_SIZE cpu_to_le32(0xC0140011)
+#define STATUS_ACPI_ACQUIRE_GLOBAL_LOCK cpu_to_le32(0xC0140012)
+#define STATUS_ACPI_ALREADY_INITIALIZED cpu_to_le32(0xC0140013)
+#define STATUS_ACPI_NOT_INITIALIZED cpu_to_le32(0xC0140014)
+#define STATUS_ACPI_INVALID_MUTEX_LEVEL cpu_to_le32(0xC0140015)
+#define STATUS_ACPI_MUTEX_NOT_OWNED cpu_to_le32(0xC0140016)
+#define STATUS_ACPI_MUTEX_NOT_OWNER cpu_to_le32(0xC0140017)
+#define STATUS_ACPI_RS_ACCESS cpu_to_le32(0xC0140018)
+#define STATUS_ACPI_INVALID_TABLE cpu_to_le32(0xC0140019)
+#define STATUS_ACPI_REG_HANDLER_FAILED cpu_to_le32(0xC0140020)
+#define STATUS_ACPI_POWER_REQUEST_FAILED cpu_to_le32(0xC0140021)
+#define STATUS_SXS_SECTION_NOT_FOUND cpu_to_le32(0xC0150001)
+#define STATUS_SXS_CANT_GEN_ACTCTX cpu_to_le32(0xC0150002)
+#define STATUS_SXS_INVALID_ACTCTXDATA_FORMAT cpu_to_le32(0xC0150003)
+#define STATUS_SXS_ASSEMBLY_NOT_FOUND cpu_to_le32(0xC0150004)
+#define STATUS_SXS_MANIFEST_FORMAT_ERROR cpu_to_le32(0xC0150005)
+#define STATUS_SXS_MANIFEST_PARSE_ERROR cpu_to_le32(0xC0150006)
+#define STATUS_SXS_ACTIVATION_CONTEXT_DISABLED cpu_to_le32(0xC0150007)
+#define STATUS_SXS_KEY_NOT_FOUND cpu_to_le32(0xC0150008)
+#define STATUS_SXS_VERSION_CONFLICT cpu_to_le32(0xC0150009)
+#define STATUS_SXS_WRONG_SECTION_TYPE cpu_to_le32(0xC015000A)
+#define STATUS_SXS_THREAD_QUERIES_DISABLED cpu_to_le32(0xC015000B)
+#define STATUS_SXS_ASSEMBLY_MISSING cpu_to_le32(0xC015000C)
+#define STATUS_SXS_PROCESS_DEFAULT_ALREADY_SET cpu_to_le32(0xC015000E)
+#define STATUS_SXS_EARLY_DEACTIVATION cpu_to_le32(0xC015000F)
+#define STATUS_SXS_INVALID_DEACTIVATION cpu_to_le32(0xC0150010)
+#define STATUS_SXS_MULTIPLE_DEACTIVATION cpu_to_le32(0xC0150011)
+#define STATUS_SXS_SYSTEM_DEFAULT_ACTIVATION_CONTEXT_EMPTY cpu_to_le32(0xC0150012)
+#define STATUS_SXS_PROCESS_TERMINATION_REQUESTED cpu_to_le32(0xC0150013)
+#define STATUS_SXS_CORRUPT_ACTIVATION_STACK cpu_to_le32(0xC0150014)
+#define STATUS_SXS_CORRUPTION cpu_to_le32(0xC0150015)
+#define STATUS_SXS_INVALID_IDENTITY_ATTRIBUTE_VALUE cpu_to_le32(0xC0150016)
+#define STATUS_SXS_INVALID_IDENTITY_ATTRIBUTE_NAME cpu_to_le32(0xC0150017)
+#define STATUS_SXS_IDENTITY_DUPLICATE_ATTRIBUTE cpu_to_le32(0xC0150018)
+#define STATUS_SXS_IDENTITY_PARSE_ERROR cpu_to_le32(0xC0150019)
+#define STATUS_SXS_COMPONENT_STORE_CORRUPT cpu_to_le32(0xC015001A)
+#define STATUS_SXS_FILE_HASH_MISMATCH cpu_to_le32(0xC015001B)
+#define STATUS_SXS_MANIFEST_IDENTITY_SAME_BUT_CONTENTS_DIFFERENT cpu_to_le32(0xC015001C)
+#define STATUS_SXS_IDENTITIES_DIFFERENT cpu_to_le32(0xC015001D)
+#define STATUS_SXS_ASSEMBLY_IS_NOT_A_DEPLOYMENT cpu_to_le32(0xC015001E)
+#define STATUS_SXS_FILE_NOT_PART_OF_ASSEMBLY cpu_to_le32(0xC015001F)
+#define STATUS_ADVANCED_INSTALLER_FAILED cpu_to_le32(0xC0150020)
+#define STATUS_XML_ENCODING_MISMATCH cpu_to_le32(0xC0150021)
+#define STATUS_SXS_MANIFEST_TOO_BIG cpu_to_le32(0xC0150022)
+#define STATUS_SXS_SETTING_NOT_REGISTERED cpu_to_le32(0xC0150023)
+#define STATUS_SXS_TRANSACTION_CLOSURE_INCOMPLETE cpu_to_le32(0xC0150024)
+#define STATUS_SMI_PRIMITIVE_INSTALLER_FAILED cpu_to_le32(0xC0150025)
+#define STATUS_GENERIC_COMMAND_FAILED cpu_to_le32(0xC0150026)
+#define STATUS_SXS_FILE_HASH_MISSING cpu_to_le32(0xC0150027)
+#define STATUS_TRANSACTIONAL_CONFLICT cpu_to_le32(0xC0190001)
+#define STATUS_INVALID_TRANSACTION cpu_to_le32(0xC0190002)
+#define STATUS_TRANSACTION_NOT_ACTIVE cpu_to_le32(0xC0190003)
+#define STATUS_TM_INITIALIZATION_FAILED cpu_to_le32(0xC0190004)
+#define STATUS_RM_NOT_ACTIVE cpu_to_le32(0xC0190005)
+#define STATUS_RM_METADATA_CORRUPT cpu_to_le32(0xC0190006)
+#define STATUS_TRANSACTION_NOT_JOINED cpu_to_le32(0xC0190007)
+#define STATUS_DIRECTORY_NOT_RM cpu_to_le32(0xC0190008)
+#define STATUS_TRANSACTIONS_UNSUPPORTED_REMOTE cpu_to_le32(0xC019000A)
+#define STATUS_LOG_RESIZE_INVALID_SIZE cpu_to_le32(0xC019000B)
+#define STATUS_REMOTE_FILE_VERSION_MISMATCH cpu_to_le32(0xC019000C)
+#define STATUS_CRM_PROTOCOL_ALREADY_EXISTS cpu_to_le32(0xC019000F)
+#define STATUS_TRANSACTION_PROPAGATION_FAILED cpu_to_le32(0xC0190010)
+#define STATUS_CRM_PROTOCOL_NOT_FOUND cpu_to_le32(0xC0190011)
+#define STATUS_TRANSACTION_SUPERIOR_EXISTS cpu_to_le32(0xC0190012)
+#define STATUS_TRANSACTION_REQUEST_NOT_VALID cpu_to_le32(0xC0190013)
+#define STATUS_TRANSACTION_NOT_REQUESTED cpu_to_le32(0xC0190014)
+#define STATUS_TRANSACTION_ALREADY_ABORTED cpu_to_le32(0xC0190015)
+#define STATUS_TRANSACTION_ALREADY_COMMITTED cpu_to_le32(0xC0190016)
+#define STATUS_TRANSACTION_INVALID_MARSHALL_BUFFER cpu_to_le32(0xC0190017)
+#define STATUS_CURRENT_TRANSACTION_NOT_VALID cpu_to_le32(0xC0190018)
+#define STATUS_LOG_GROWTH_FAILED cpu_to_le32(0xC0190019)
+#define STATUS_OBJECT_NO_LONGER_EXISTS cpu_to_le32(0xC0190021)
+#define STATUS_STREAM_MINIVERSION_NOT_FOUND cpu_to_le32(0xC0190022)
+#define STATUS_STREAM_MINIVERSION_NOT_VALID cpu_to_le32(0xC0190023)
+#define STATUS_MINIVERSION_INACCESSIBLE_FROM_SPECIFIED_TRANSACTION cpu_to_le32(0xC0190024)
+#define STATUS_CANT_OPEN_MINIVERSION_WITH_MODIFY_INTENT cpu_to_le32(0xC0190025)
+#define STATUS_CANT_CREATE_MORE_STREAM_MINIVERSIONS cpu_to_le32(0xC0190026)
+#define STATUS_HANDLE_NO_LONGER_VALID cpu_to_le32(0xC0190028)
+#define STATUS_LOG_CORRUPTION_DETECTED cpu_to_le32(0xC0190030)
+#define STATUS_RM_DISCONNECTED cpu_to_le32(0xC0190032)
+#define STATUS_ENLISTMENT_NOT_SUPERIOR cpu_to_le32(0xC0190033)
+#define STATUS_FILE_IDENTITY_NOT_PERSISTENT cpu_to_le32(0xC0190036)
+#define STATUS_CANT_BREAK_TRANSACTIONAL_DEPENDENCY cpu_to_le32(0xC0190037)
+#define STATUS_CANT_CROSS_RM_BOUNDARY cpu_to_le32(0xC0190038)
+#define STATUS_TXF_DIR_NOT_EMPTY cpu_to_le32(0xC0190039)
+#define STATUS_INDOUBT_TRANSACTIONS_EXIST cpu_to_le32(0xC019003A)
+#define STATUS_TM_VOLATILE cpu_to_le32(0xC019003B)
+#define STATUS_ROLLBACK_TIMER_EXPIRED cpu_to_le32(0xC019003C)
+#define STATUS_TXF_ATTRIBUTE_CORRUPT cpu_to_le32(0xC019003D)
+#define STATUS_EFS_NOT_ALLOWED_IN_TRANSACTION cpu_to_le32(0xC019003E)
+#define STATUS_TRANSACTIONAL_OPEN_NOT_ALLOWED cpu_to_le32(0xC019003F)
+#define STATUS_TRANSACTED_MAPPING_UNSUPPORTED_REMOTE cpu_to_le32(0xC0190040)
+#define STATUS_TRANSACTION_REQUIRED_PROMOTION cpu_to_le32(0xC0190043)
+#define STATUS_CANNOT_EXECUTE_FILE_IN_TRANSACTION cpu_to_le32(0xC0190044)
+#define STATUS_TRANSACTIONS_NOT_FROZEN cpu_to_le32(0xC0190045)
+#define STATUS_TRANSACTION_FREEZE_IN_PROGRESS cpu_to_le32(0xC0190046)
+#define STATUS_NOT_SNAPSHOT_VOLUME cpu_to_le32(0xC0190047)
+#define STATUS_NO_SAVEPOINT_WITH_OPEN_FILES cpu_to_le32(0xC0190048)
+#define STATUS_SPARSE_NOT_ALLOWED_IN_TRANSACTION cpu_to_le32(0xC0190049)
+#define STATUS_TM_IDENTITY_MISMATCH cpu_to_le32(0xC019004A)
+#define STATUS_FLOATED_SECTION cpu_to_le32(0xC019004B)
+#define STATUS_CANNOT_ACCEPT_TRANSACTED_WORK cpu_to_le32(0xC019004C)
+#define STATUS_CANNOT_ABORT_TRANSACTIONS cpu_to_le32(0xC019004D)
+#define STATUS_TRANSACTION_NOT_FOUND cpu_to_le32(0xC019004E)
+#define STATUS_RESOURCEMANAGER_NOT_FOUND cpu_to_le32(0xC019004F)
+#define STATUS_ENLISTMENT_NOT_FOUND cpu_to_le32(0xC0190050)
+#define STATUS_TRANSACTIONMANAGER_NOT_FOUND cpu_to_le32(0xC0190051)
+#define STATUS_TRANSACTIONMANAGER_NOT_ONLINE cpu_to_le32(0xC0190052)
+#define STATUS_TRANSACTIONMANAGER_RECOVERY_NAME_COLLISION cpu_to_le32(0xC0190053)
+#define STATUS_TRANSACTION_NOT_ROOT cpu_to_le32(0xC0190054)
+#define STATUS_TRANSACTION_OBJECT_EXPIRED cpu_to_le32(0xC0190055)
+#define STATUS_COMPRESSION_NOT_ALLOWED_IN_TRANSACTION cpu_to_le32(0xC0190056)
+#define STATUS_TRANSACTION_RESPONSE_NOT_ENLISTED cpu_to_le32(0xC0190057)
+#define STATUS_TRANSACTION_RECORD_TOO_LONG cpu_to_le32(0xC0190058)
+#define STATUS_NO_LINK_TRACKING_IN_TRANSACTION cpu_to_le32(0xC0190059)
+#define STATUS_OPERATION_NOT_SUPPORTED_IN_TRANSACTION cpu_to_le32(0xC019005A)
+#define STATUS_TRANSACTION_INTEGRITY_VIOLATED cpu_to_le32(0xC019005B)
+#define STATUS_LOG_SECTOR_INVALID cpu_to_le32(0xC01A0001)
+#define STATUS_LOG_SECTOR_PARITY_INVALID cpu_to_le32(0xC01A0002)
+#define STATUS_LOG_SECTOR_REMAPPED cpu_to_le32(0xC01A0003)
+#define STATUS_LOG_BLOCK_INCOMPLETE cpu_to_le32(0xC01A0004)
+#define STATUS_LOG_INVALID_RANGE cpu_to_le32(0xC01A0005)
+#define STATUS_LOG_BLOCKS_EXHAUSTED cpu_to_le32(0xC01A0006)
+#define STATUS_LOG_READ_CONTEXT_INVALID cpu_to_le32(0xC01A0007)
+#define STATUS_LOG_RESTART_INVALID cpu_to_le32(0xC01A0008)
+#define STATUS_LOG_BLOCK_VERSION cpu_to_le32(0xC01A0009)
+#define STATUS_LOG_BLOCK_INVALID cpu_to_le32(0xC01A000A)
+#define STATUS_LOG_READ_MODE_INVALID cpu_to_le32(0xC01A000B)
+#define STATUS_LOG_METADATA_CORRUPT cpu_to_le32(0xC01A000D)
+#define STATUS_LOG_METADATA_INVALID cpu_to_le32(0xC01A000E)
+#define STATUS_LOG_METADATA_INCONSISTENT cpu_to_le32(0xC01A000F)
+#define STATUS_LOG_RESERVATION_INVALID cpu_to_le32(0xC01A0010)
+#define STATUS_LOG_CANT_DELETE cpu_to_le32(0xC01A0011)
+#define STATUS_LOG_CONTAINER_LIMIT_EXCEEDED cpu_to_le32(0xC01A0012)
+#define STATUS_LOG_START_OF_LOG cpu_to_le32(0xC01A0013)
+#define STATUS_LOG_POLICY_ALREADY_INSTALLED cpu_to_le32(0xC01A0014)
+#define STATUS_LOG_POLICY_NOT_INSTALLED cpu_to_le32(0xC01A0015)
+#define STATUS_LOG_POLICY_INVALID cpu_to_le32(0xC01A0016)
+#define STATUS_LOG_POLICY_CONFLICT cpu_to_le32(0xC01A0017)
+#define STATUS_LOG_PINNED_ARCHIVE_TAIL cpu_to_le32(0xC01A0018)
+#define STATUS_LOG_RECORD_NONEXISTENT cpu_to_le32(0xC01A0019)
+#define STATUS_LOG_RECORDS_RESERVED_INVALID cpu_to_le32(0xC01A001A)
+#define STATUS_LOG_SPACE_RESERVED_INVALID cpu_to_le32(0xC01A001B)
+#define STATUS_LOG_TAIL_INVALID cpu_to_le32(0xC01A001C)
+#define STATUS_LOG_FULL cpu_to_le32(0xC01A001D)
+#define STATUS_LOG_MULTIPLEXED cpu_to_le32(0xC01A001E)
+#define STATUS_LOG_DEDICATED cpu_to_le32(0xC01A001F)
+#define STATUS_LOG_ARCHIVE_NOT_IN_PROGRESS cpu_to_le32(0xC01A0020)
+#define STATUS_LOG_ARCHIVE_IN_PROGRESS cpu_to_le32(0xC01A0021)
+#define STATUS_LOG_EPHEMERAL cpu_to_le32(0xC01A0022)
+#define STATUS_LOG_NOT_ENOUGH_CONTAINERS cpu_to_le32(0xC01A0023)
+#define STATUS_LOG_CLIENT_ALREADY_REGISTERED cpu_to_le32(0xC01A0024)
+#define STATUS_LOG_CLIENT_NOT_REGISTERED cpu_to_le32(0xC01A0025)
+#define STATUS_LOG_FULL_HANDLER_IN_PROGRESS cpu_to_le32(0xC01A0026)
+#define STATUS_LOG_CONTAINER_READ_FAILED cpu_to_le32(0xC01A0027)
+#define STATUS_LOG_CONTAINER_WRITE_FAILED cpu_to_le32(0xC01A0028)
+#define STATUS_LOG_CONTAINER_OPEN_FAILED cpu_to_le32(0xC01A0029)
+#define STATUS_LOG_CONTAINER_STATE_INVALID cpu_to_le32(0xC01A002A)
+#define STATUS_LOG_STATE_INVALID cpu_to_le32(0xC01A002B)
+#define STATUS_LOG_PINNED cpu_to_le32(0xC01A002C)
+#define STATUS_LOG_METADATA_FLUSH_FAILED cpu_to_le32(0xC01A002D)
+#define STATUS_LOG_INCONSISTENT_SECURITY cpu_to_le32(0xC01A002E)
+#define STATUS_LOG_APPENDED_FLUSH_FAILED cpu_to_le32(0xC01A002F)
+#define STATUS_LOG_PINNED_RESERVATION cpu_to_le32(0xC01A0030)
+#define STATUS_VIDEO_HUNG_DISPLAY_DRIVER_THREAD cpu_to_le32(0xC01B00EA)
+#define STATUS_FLT_NO_HANDLER_DEFINED cpu_to_le32(0xC01C0001)
+#define STATUS_FLT_CONTEXT_ALREADY_DEFINED cpu_to_le32(0xC01C0002)
+#define STATUS_FLT_INVALID_ASYNCHRONOUS_REQUEST cpu_to_le32(0xC01C0003)
+#define STATUS_FLT_DISALLOW_FAST_IO cpu_to_le32(0xC01C0004)
+#define STATUS_FLT_INVALID_NAME_REQUEST cpu_to_le32(0xC01C0005)
+#define STATUS_FLT_NOT_SAFE_TO_POST_OPERATION cpu_to_le32(0xC01C0006)
+#define STATUS_FLT_NOT_INITIALIZED cpu_to_le32(0xC01C0007)
+#define STATUS_FLT_FILTER_NOT_READY cpu_to_le32(0xC01C0008)
+#define STATUS_FLT_POST_OPERATION_CLEANUP cpu_to_le32(0xC01C0009)
+#define STATUS_FLT_INTERNAL_ERROR cpu_to_le32(0xC01C000A)
+#define STATUS_FLT_DELETING_OBJECT cpu_to_le32(0xC01C000B)
+#define STATUS_FLT_MUST_BE_NONPAGED_POOL cpu_to_le32(0xC01C000C)
+#define STATUS_FLT_DUPLICATE_ENTRY cpu_to_le32(0xC01C000D)
+#define STATUS_FLT_CBDQ_DISABLED cpu_to_le32(0xC01C000E)
+#define STATUS_FLT_DO_NOT_ATTACH cpu_to_le32(0xC01C000F)
+#define STATUS_FLT_DO_NOT_DETACH cpu_to_le32(0xC01C0010)
+#define STATUS_FLT_INSTANCE_ALTITUDE_COLLISION cpu_to_le32(0xC01C0011)
+#define STATUS_FLT_INSTANCE_NAME_COLLISION cpu_to_le32(0xC01C0012)
+#define STATUS_FLT_FILTER_NOT_FOUND cpu_to_le32(0xC01C0013)
+#define STATUS_FLT_VOLUME_NOT_FOUND cpu_to_le32(0xC01C0014)
+#define STATUS_FLT_INSTANCE_NOT_FOUND cpu_to_le32(0xC01C0015)
+#define STATUS_FLT_CONTEXT_ALLOCATION_NOT_FOUND cpu_to_le32(0xC01C0016)
+#define STATUS_FLT_INVALID_CONTEXT_REGISTRATION cpu_to_le32(0xC01C0017)
+#define STATUS_FLT_NAME_CACHE_MISS cpu_to_le32(0xC01C0018)
+#define STATUS_FLT_NO_DEVICE_OBJECT cpu_to_le32(0xC01C0019)
+#define STATUS_FLT_VOLUME_ALREADY_MOUNTED cpu_to_le32(0xC01C001A)
+#define STATUS_FLT_ALREADY_ENLISTED cpu_to_le32(0xC01C001B)
+#define STATUS_FLT_CONTEXT_ALREADY_LINKED cpu_to_le32(0xC01C001C)
+#define STATUS_FLT_NO_WAITER_FOR_REPLY cpu_to_le32(0xC01C0020)
+#define STATUS_MONITOR_NO_DESCRIPTOR cpu_to_le32(0xC01D0001)
+#define STATUS_MONITOR_UNKNOWN_DESCRIPTOR_FORMAT cpu_to_le32(0xC01D0002)
+#define STATUS_MONITOR_INVALID_DESCRIPTOR_CHECKSUM cpu_to_le32(0xC01D0003)
+#define STATUS_MONITOR_INVALID_STANDARD_TIMING_BLOCK cpu_to_le32(0xC01D0004)
+#define STATUS_MONITOR_WMI_DATABLOCK_REGISTRATION_FAILED cpu_to_le32(0xC01D0005)
+#define STATUS_MONITOR_INVALID_SERIAL_NUMBER_MONDSC_BLOCK cpu_to_le32(0xC01D0006)
+#define STATUS_MONITOR_INVALID_USER_FRIENDLY_MONDSC_BLOCK cpu_to_le32(0xC01D0007)
+#define STATUS_MONITOR_NO_MORE_DESCRIPTOR_DATA cpu_to_le32(0xC01D0008)
+#define STATUS_MONITOR_INVALID_DETAILED_TIMING_BLOCK cpu_to_le32(0xC01D0009)
+#define STATUS_GRAPHICS_NOT_EXCLUSIVE_MODE_OWNER cpu_to_le32(0xC01E0000)
+#define STATUS_GRAPHICS_INSUFFICIENT_DMA_BUFFER cpu_to_le32(0xC01E0001)
+#define STATUS_GRAPHICS_INVALID_DISPLAY_ADAPTER cpu_to_le32(0xC01E0002)
+#define STATUS_GRAPHICS_ADAPTER_WAS_RESET cpu_to_le32(0xC01E0003)
+#define STATUS_GRAPHICS_INVALID_DRIVER_MODEL cpu_to_le32(0xC01E0004)
+#define STATUS_GRAPHICS_PRESENT_MODE_CHANGED cpu_to_le32(0xC01E0005)
+#define STATUS_GRAPHICS_PRESENT_OCCLUDED cpu_to_le32(0xC01E0006)
+#define STATUS_GRAPHICS_PRESENT_DENIED cpu_to_le32(0xC01E0007)
+#define STATUS_GRAPHICS_CANNOTCOLORCONVERT cpu_to_le32(0xC01E0008)
+#define STATUS_GRAPHICS_NO_VIDEO_MEMORY cpu_to_le32(0xC01E0100)
+#define STATUS_GRAPHICS_CANT_LOCK_MEMORY cpu_to_le32(0xC01E0101)
+#define STATUS_GRAPHICS_ALLOCATION_BUSY cpu_to_le32(0xC01E0102)
+#define STATUS_GRAPHICS_TOO_MANY_REFERENCES cpu_to_le32(0xC01E0103)
+#define STATUS_GRAPHICS_TRY_AGAIN_LATER cpu_to_le32(0xC01E0104)
+#define STATUS_GRAPHICS_TRY_AGAIN_NOW cpu_to_le32(0xC01E0105)
+#define STATUS_GRAPHICS_ALLOCATION_INVALID cpu_to_le32(0xC01E0106)
+#define STATUS_GRAPHICS_UNSWIZZLING_APERTURE_UNAVAILABLE cpu_to_le32(0xC01E0107)
+#define STATUS_GRAPHICS_UNSWIZZLING_APERTURE_UNSUPPORTED cpu_to_le32(0xC01E0108)
+#define STATUS_GRAPHICS_CANT_EVICT_PINNED_ALLOCATION cpu_to_le32(0xC01E0109)
+#define STATUS_GRAPHICS_INVALID_ALLOCATION_USAGE cpu_to_le32(0xC01E0110)
+#define STATUS_GRAPHICS_CANT_RENDER_LOCKED_ALLOCATION cpu_to_le32(0xC01E0111)
+#define STATUS_GRAPHICS_ALLOCATION_CLOSED cpu_to_le32(0xC01E0112)
+#define STATUS_GRAPHICS_INVALID_ALLOCATION_INSTANCE cpu_to_le32(0xC01E0113)
+#define STATUS_GRAPHICS_INVALID_ALLOCATION_HANDLE cpu_to_le32(0xC01E0114)
+#define STATUS_GRAPHICS_WRONG_ALLOCATION_DEVICE cpu_to_le32(0xC01E0115)
+#define STATUS_GRAPHICS_ALLOCATION_CONTENT_LOST cpu_to_le32(0xC01E0116)
+#define STATUS_GRAPHICS_GPU_EXCEPTION_ON_DEVICE cpu_to_le32(0xC01E0200)
+#define STATUS_GRAPHICS_INVALID_VIDPN_TOPOLOGY cpu_to_le32(0xC01E0300)
+#define STATUS_GRAPHICS_VIDPN_TOPOLOGY_NOT_SUPPORTED cpu_to_le32(0xC01E0301)
+#define STATUS_GRAPHICS_VIDPN_TOPOLOGY_CURRENTLY_NOT_SUPPORTED cpu_to_le32(0xC01E0302)
+#define STATUS_GRAPHICS_INVALID_VIDPN cpu_to_le32(0xC01E0303)
+#define STATUS_GRAPHICS_INVALID_VIDEO_PRESENT_SOURCE cpu_to_le32(0xC01E0304)
+#define STATUS_GRAPHICS_INVALID_VIDEO_PRESENT_TARGET cpu_to_le32(0xC01E0305)
+#define STATUS_GRAPHICS_VIDPN_MODALITY_NOT_SUPPORTED cpu_to_le32(0xC01E0306)
+#define STATUS_GRAPHICS_INVALID_VIDPN_SOURCEMODESET cpu_to_le32(0xC01E0308)
+#define STATUS_GRAPHICS_INVALID_VIDPN_TARGETMODESET cpu_to_le32(0xC01E0309)
+#define STATUS_GRAPHICS_INVALID_FREQUENCY cpu_to_le32(0xC01E030A)
+#define STATUS_GRAPHICS_INVALID_ACTIVE_REGION cpu_to_le32(0xC01E030B)
+#define STATUS_GRAPHICS_INVALID_TOTAL_REGION cpu_to_le32(0xC01E030C)
+#define STATUS_GRAPHICS_INVALID_VIDEO_PRESENT_SOURCE_MODE cpu_to_le32(0xC01E0310)
+#define STATUS_GRAPHICS_INVALID_VIDEO_PRESENT_TARGET_MODE cpu_to_le32(0xC01E0311)
+#define STATUS_GRAPHICS_PINNED_MODE_MUST_REMAIN_IN_SET cpu_to_le32(0xC01E0312)
+#define STATUS_GRAPHICS_PATH_ALREADY_IN_TOPOLOGY cpu_to_le32(0xC01E0313)
+#define STATUS_GRAPHICS_MODE_ALREADY_IN_MODESET cpu_to_le32(0xC01E0314)
+#define STATUS_GRAPHICS_INVALID_VIDEOPRESENTSOURCESET cpu_to_le32(0xC01E0315)
+#define STATUS_GRAPHICS_INVALID_VIDEOPRESENTTARGETSET cpu_to_le32(0xC01E0316)
+#define STATUS_GRAPHICS_SOURCE_ALREADY_IN_SET cpu_to_le32(0xC01E0317)
+#define STATUS_GRAPHICS_TARGET_ALREADY_IN_SET cpu_to_le32(0xC01E0318)
+#define STATUS_GRAPHICS_INVALID_VIDPN_PRESENT_PATH cpu_to_le32(0xC01E0319)
+#define STATUS_GRAPHICS_NO_RECOMMENDED_VIDPN_TOPOLOGY cpu_to_le32(0xC01E031A)
+#define STATUS_GRAPHICS_INVALID_MONITOR_FREQUENCYRANGESET cpu_to_le32(0xC01E031B)
+#define STATUS_GRAPHICS_INVALID_MONITOR_FREQUENCYRANGE cpu_to_le32(0xC01E031C)
+#define STATUS_GRAPHICS_FREQUENCYRANGE_NOT_IN_SET cpu_to_le32(0xC01E031D)
+#define STATUS_GRAPHICS_FREQUENCYRANGE_ALREADY_IN_SET cpu_to_le32(0xC01E031F)
+#define STATUS_GRAPHICS_STALE_MODESET cpu_to_le32(0xC01E0320)
+#define STATUS_GRAPHICS_INVALID_MONITOR_SOURCEMODESET cpu_to_le32(0xC01E0321)
+#define STATUS_GRAPHICS_INVALID_MONITOR_SOURCE_MODE cpu_to_le32(0xC01E0322)
+#define STATUS_GRAPHICS_NO_RECOMMENDED_FUNCTIONAL_VIDPN cpu_to_le32(0xC01E0323)
+#define STATUS_GRAPHICS_MODE_ID_MUST_BE_UNIQUE cpu_to_le32(0xC01E0324)
+#define STATUS_GRAPHICS_EMPTY_ADAPTER_MONITOR_MODE_SUPPORT_INTERSECTION cpu_to_le32(0xC01E0325)
+#define STATUS_GRAPHICS_VIDEO_PRESENT_TARGETS_LESS_THAN_SOURCES cpu_to_le32(0xC01E0326)
+#define STATUS_GRAPHICS_PATH_NOT_IN_TOPOLOGY cpu_to_le32(0xC01E0327)
+#define STATUS_GRAPHICS_ADAPTER_MUST_HAVE_AT_LEAST_ONE_SOURCE cpu_to_le32(0xC01E0328)
+#define STATUS_GRAPHICS_ADAPTER_MUST_HAVE_AT_LEAST_ONE_TARGET cpu_to_le32(0xC01E0329)
+#define STATUS_GRAPHICS_INVALID_MONITORDESCRIPTORSET cpu_to_le32(0xC01E032A)
+#define STATUS_GRAPHICS_INVALID_MONITORDESCRIPTOR cpu_to_le32(0xC01E032B)
+#define STATUS_GRAPHICS_MONITORDESCRIPTOR_NOT_IN_SET cpu_to_le32(0xC01E032C)
+#define STATUS_GRAPHICS_MONITORDESCRIPTOR_ALREADY_IN_SET cpu_to_le32(0xC01E032D)
+#define STATUS_GRAPHICS_MONITORDESCRIPTOR_ID_MUST_BE_UNIQUE cpu_to_le32(0xC01E032E)
+#define STATUS_GRAPHICS_INVALID_VIDPN_TARGET_SUBSET_TYPE cpu_to_le32(0xC01E032F)
+#define STATUS_GRAPHICS_RESOURCES_NOT_RELATED cpu_to_le32(0xC01E0330)
+#define STATUS_GRAPHICS_SOURCE_ID_MUST_BE_UNIQUE cpu_to_le32(0xC01E0331)
+#define STATUS_GRAPHICS_TARGET_ID_MUST_BE_UNIQUE cpu_to_le32(0xC01E0332)
+#define STATUS_GRAPHICS_NO_AVAILABLE_VIDPN_TARGET cpu_to_le32(0xC01E0333)
+#define STATUS_GRAPHICS_MONITOR_COULD_NOT_BE_ASSOCIATED_WITH_ADAPTER cpu_to_le32(0xC01E0334)
+#define STATUS_GRAPHICS_NO_VIDPNMGR cpu_to_le32(0xC01E0335)
+#define STATUS_GRAPHICS_NO_ACTIVE_VIDPN cpu_to_le32(0xC01E0336)
+#define STATUS_GRAPHICS_STALE_VIDPN_TOPOLOGY cpu_to_le32(0xC01E0337)
+#define STATUS_GRAPHICS_MONITOR_NOT_CONNECTED cpu_to_le32(0xC01E0338)
+#define STATUS_GRAPHICS_SOURCE_NOT_IN_TOPOLOGY cpu_to_le32(0xC01E0339)
+#define STATUS_GRAPHICS_INVALID_PRIMARYSURFACE_SIZE cpu_to_le32(0xC01E033A)
+#define STATUS_GRAPHICS_INVALID_VISIBLEREGION_SIZE cpu_to_le32(0xC01E033B)
+#define STATUS_GRAPHICS_INVALID_STRIDE cpu_to_le32(0xC01E033C)
+#define STATUS_GRAPHICS_INVALID_PIXELFORMAT cpu_to_le32(0xC01E033D)
+#define STATUS_GRAPHICS_INVALID_COLORBASIS cpu_to_le32(0xC01E033E)
+#define STATUS_GRAPHICS_INVALID_PIXELVALUEACCESSMODE cpu_to_le32(0xC01E033F)
+#define STATUS_GRAPHICS_TARGET_NOT_IN_TOPOLOGY cpu_to_le32(0xC01E0340)
+#define STATUS_GRAPHICS_NO_DISPLAY_MODE_MANAGEMENT_SUPPORT cpu_to_le32(0xC01E0341)
+#define STATUS_GRAPHICS_VIDPN_SOURCE_IN_USE cpu_to_le32(0xC01E0342)
+#define STATUS_GRAPHICS_CANT_ACCESS_ACTIVE_VIDPN cpu_to_le32(0xC01E0343)
+#define STATUS_GRAPHICS_INVALID_PATH_IMPORTANCE_ORDINAL cpu_to_le32(0xC01E0344)
+#define STATUS_GRAPHICS_INVALID_PATH_CONTENT_GEOMETRY_TRANSFORMATION cpu_to_le32(0xC01E0345)
+#define STATUS_GRAPHICS_PATH_CONTENT_GEOMETRY_TRANSFORMATION_NOT_SUPPORTED cpu_to_le32(0xC01E0346)
+#define STATUS_GRAPHICS_INVALID_GAMMA_RAMP cpu_to_le32(0xC01E0347)
+#define STATUS_GRAPHICS_GAMMA_RAMP_NOT_SUPPORTED cpu_to_le32(0xC01E0348)
+#define STATUS_GRAPHICS_MULTISAMPLING_NOT_SUPPORTED cpu_to_le32(0xC01E0349)
+#define STATUS_GRAPHICS_MODE_NOT_IN_MODESET cpu_to_le32(0xC01E034A)
+#define STATUS_GRAPHICS_INVALID_VIDPN_TOPOLOGY_RECOMMENDATION_REASON cpu_to_le32(0xC01E034D)
+#define STATUS_GRAPHICS_INVALID_PATH_CONTENT_TYPE cpu_to_le32(0xC01E034E)
+#define STATUS_GRAPHICS_INVALID_COPYPROTECTION_TYPE cpu_to_le32(0xC01E034F)
+#define STATUS_GRAPHICS_UNASSIGNED_MODESET_ALREADY_EXISTS cpu_to_le32(0xC01E0350)
+#define STATUS_GRAPHICS_INVALID_SCANLINE_ORDERING cpu_to_le32(0xC01E0352)
+#define STATUS_GRAPHICS_TOPOLOGY_CHANGES_NOT_ALLOWED cpu_to_le32(0xC01E0353)
+#define STATUS_GRAPHICS_NO_AVAILABLE_IMPORTANCE_ORDINALS cpu_to_le32(0xC01E0354)
+#define STATUS_GRAPHICS_INCOMPATIBLE_PRIVATE_FORMAT cpu_to_le32(0xC01E0355)
+#define STATUS_GRAPHICS_INVALID_MODE_PRUNING_ALGORITHM cpu_to_le32(0xC01E0356)
+#define STATUS_GRAPHICS_INVALID_MONITOR_CAPABILITY_ORIGIN cpu_to_le32(0xC01E0357)
+#define STATUS_GRAPHICS_INVALID_MONITOR_FREQUENCYRANGE_CONSTRAINT cpu_to_le32(0xC01E0358)
+#define STATUS_GRAPHICS_MAX_NUM_PATHS_REACHED cpu_to_le32(0xC01E0359)
+#define STATUS_GRAPHICS_CANCEL_VIDPN_TOPOLOGY_AUGMENTATION cpu_to_le32(0xC01E035A)
+#define STATUS_GRAPHICS_INVALID_CLIENT_TYPE cpu_to_le32(0xC01E035B)
+#define STATUS_GRAPHICS_CLIENTVIDPN_NOT_SET cpu_to_le32(0xC01E035C)
+#define STATUS_GRAPHICS_SPECIFIED_CHILD_ALREADY_CONNECTED cpu_to_le32(0xC01E0400)
+#define STATUS_GRAPHICS_CHILD_DESCRIPTOR_NOT_SUPPORTED cpu_to_le32(0xC01E0401)
+#define STATUS_GRAPHICS_NOT_A_LINKED_ADAPTER cpu_to_le32(0xC01E0430)
+#define STATUS_GRAPHICS_LEADLINK_NOT_ENUMERATED cpu_to_le32(0xC01E0431)
+#define STATUS_GRAPHICS_CHAINLINKS_NOT_ENUMERATED cpu_to_le32(0xC01E0432)
+#define STATUS_GRAPHICS_ADAPTER_CHAIN_NOT_READY cpu_to_le32(0xC01E0433)
+#define STATUS_GRAPHICS_CHAINLINKS_NOT_STARTED cpu_to_le32(0xC01E0434)
+#define STATUS_GRAPHICS_CHAINLINKS_NOT_POWERED_ON cpu_to_le32(0xC01E0435)
+#define STATUS_GRAPHICS_INCONSISTENT_DEVICE_LINK_STATE cpu_to_le32(0xC01E0436)
+#define STATUS_GRAPHICS_NOT_POST_DEVICE_DRIVER cpu_to_le32(0xC01E0438)
+#define STATUS_GRAPHICS_ADAPTER_ACCESS_NOT_EXCLUDED cpu_to_le32(0xC01E043B)
+#define STATUS_GRAPHICS_OPM_PROTECTED_OUTPUT_DOES_NOT_HAVE_COPP_SEMANTICS cpu_to_le32(0xC01E051C)
+#define STATUS_GRAPHICS_OPM_INVALID_INFORMATION_REQUEST cpu_to_le32(0xC01E051D)
+#define STATUS_GRAPHICS_OPM_DRIVER_INTERNAL_ERROR cpu_to_le32(0xC01E051E)
+#define STATUS_GRAPHICS_OPM_PROTECTED_OUTPUT_DOES_NOT_HAVE_OPM_SEMANTICS cpu_to_le32(0xC01E051F)
+#define STATUS_GRAPHICS_OPM_SIGNALING_NOT_SUPPORTED cpu_to_le32(0xC01E0520)
+#define STATUS_GRAPHICS_OPM_INVALID_CONFIGURATION_REQUEST cpu_to_le32(0xC01E0521)
+#define STATUS_GRAPHICS_OPM_NOT_SUPPORTED cpu_to_le32(0xC01E0500)
+#define STATUS_GRAPHICS_COPP_NOT_SUPPORTED cpu_to_le32(0xC01E0501)
+#define STATUS_GRAPHICS_UAB_NOT_SUPPORTED cpu_to_le32(0xC01E0502)
+#define STATUS_GRAPHICS_OPM_INVALID_ENCRYPTED_PARAMETERS cpu_to_le32(0xC01E0503)
+#define STATUS_GRAPHICS_OPM_PARAMETER_ARRAY_TOO_SMALL cpu_to_le32(0xC01E0504)
+#define STATUS_GRAPHICS_OPM_NO_PROTECTED_OUTPUTS_EXIST cpu_to_le32(0xC01E0505)
+#define STATUS_GRAPHICS_PVP_NO_DISPLAY_DEVICE_CORRESPONDS_TO_NAME cpu_to_le32(0xC01E0506)
+#define STATUS_GRAPHICS_PVP_DISPLAY_DEVICE_NOT_ATTACHED_TO_DESKTOP cpu_to_le32(0xC01E0507)
+#define STATUS_GRAPHICS_PVP_MIRRORING_DEVICES_NOT_SUPPORTED cpu_to_le32(0xC01E0508)
+#define STATUS_GRAPHICS_OPM_INVALID_POINTER cpu_to_le32(0xC01E050A)
+#define STATUS_GRAPHICS_OPM_INTERNAL_ERROR cpu_to_le32(0xC01E050B)
+#define STATUS_GRAPHICS_OPM_INVALID_HANDLE cpu_to_le32(0xC01E050C)
+#define STATUS_GRAPHICS_PVP_NO_MONITORS_CORRESPOND_TO_DISPLAY_DEVICE cpu_to_le32(0xC01E050D)
+#define STATUS_GRAPHICS_PVP_INVALID_CERTIFICATE_LENGTH cpu_to_le32(0xC01E050E)
+#define STATUS_GRAPHICS_OPM_SPANNING_MODE_ENABLED cpu_to_le32(0xC01E050F)
+#define STATUS_GRAPHICS_OPM_THEATER_MODE_ENABLED cpu_to_le32(0xC01E0510)
+#define STATUS_GRAPHICS_PVP_HFS_FAILED cpu_to_le32(0xC01E0511)
+#define STATUS_GRAPHICS_OPM_INVALID_SRM cpu_to_le32(0xC01E0512)
+#define STATUS_GRAPHICS_OPM_OUTPUT_DOES_NOT_SUPPORT_HDCP cpu_to_le32(0xC01E0513)
+#define STATUS_GRAPHICS_OPM_OUTPUT_DOES_NOT_SUPPORT_ACP cpu_to_le32(0xC01E0514)
+#define STATUS_GRAPHICS_OPM_OUTPUT_DOES_NOT_SUPPORT_CGMSA cpu_to_le32(0xC01E0515)
+#define STATUS_GRAPHICS_OPM_HDCP_SRM_NEVER_SET cpu_to_le32(0xC01E0516)
+#define STATUS_GRAPHICS_OPM_RESOLUTION_TOO_HIGH cpu_to_le32(0xC01E0517)
+#define STATUS_GRAPHICS_OPM_ALL_HDCP_HARDWARE_ALREADY_IN_USE cpu_to_le32(0xC01E0518)
+#define STATUS_GRAPHICS_OPM_PROTECTED_OUTPUT_NO_LONGER_EXISTS cpu_to_le32(0xC01E051A)
+#define STATUS_GRAPHICS_OPM_SESSION_TYPE_CHANGE_IN_PROGRESS cpu_to_le32(0xC01E051B)
+#define STATUS_GRAPHICS_I2C_NOT_SUPPORTED cpu_to_le32(0xC01E0580)
+#define STATUS_GRAPHICS_I2C_DEVICE_DOES_NOT_EXIST cpu_to_le32(0xC01E0581)
+#define STATUS_GRAPHICS_I2C_ERROR_TRANSMITTING_DATA cpu_to_le32(0xC01E0582)
+#define STATUS_GRAPHICS_I2C_ERROR_RECEIVING_DATA cpu_to_le32(0xC01E0583)
+#define STATUS_GRAPHICS_DDCCI_VCP_NOT_SUPPORTED cpu_to_le32(0xC01E0584)
+#define STATUS_GRAPHICS_DDCCI_INVALID_DATA cpu_to_le32(0xC01E0585)
+#define STATUS_GRAPHICS_DDCCI_MONITOR_RETURNED_INVALID_TIMING_STATUS_BYTE cpu_to_le32(0xC01E0586)
+#define STATUS_GRAPHICS_DDCCI_INVALID_CAPABILITIES_STRING cpu_to_le32(0xC01E0587)
+#define STATUS_GRAPHICS_MCA_INTERNAL_ERROR cpu_to_le32(0xC01E0588)
+#define STATUS_GRAPHICS_DDCCI_INVALID_MESSAGE_COMMAND cpu_to_le32(0xC01E0589)
+#define STATUS_GRAPHICS_DDCCI_INVALID_MESSAGE_LENGTH cpu_to_le32(0xC01E058A)
+#define STATUS_GRAPHICS_DDCCI_INVALID_MESSAGE_CHECKSUM cpu_to_le32(0xC01E058B)
+#define STATUS_GRAPHICS_INVALID_PHYSICAL_MONITOR_HANDLE cpu_to_le32(0xC01E058C)
+#define STATUS_GRAPHICS_MONITOR_NO_LONGER_EXISTS cpu_to_le32(0xC01E058D)
+#define STATUS_GRAPHICS_ONLY_CONSOLE_SESSION_SUPPORTED cpu_to_le32(0xC01E05E0)
+#define STATUS_GRAPHICS_NO_DISPLAY_DEVICE_CORRESPONDS_TO_NAME cpu_to_le32(0xC01E05E1)
+#define STATUS_GRAPHICS_DISPLAY_DEVICE_NOT_ATTACHED_TO_DESKTOP cpu_to_le32(0xC01E05E2)
+#define STATUS_GRAPHICS_MIRRORING_DEVICES_NOT_SUPPORTED cpu_to_le32(0xC01E05E3)
+#define STATUS_GRAPHICS_INVALID_POINTER cpu_to_le32(0xC01E05E4)
+#define STATUS_GRAPHICS_NO_MONITORS_CORRESPOND_TO_DISPLAY_DEVICE cpu_to_le32(0xC01E05E5)
+#define STATUS_GRAPHICS_PARAMETER_ARRAY_TOO_SMALL cpu_to_le32(0xC01E05E6)
+#define STATUS_GRAPHICS_INTERNAL_ERROR cpu_to_le32(0xC01E05E7)
+#define STATUS_GRAPHICS_SESSION_TYPE_CHANGE_IN_PROGRESS cpu_to_le32(0xC01E05E8)
+#define STATUS_FVE_LOCKED_VOLUME cpu_to_le32(0xC0210000)
+#define STATUS_FVE_NOT_ENCRYPTED cpu_to_le32(0xC0210001)
+#define STATUS_FVE_BAD_INFORMATION cpu_to_le32(0xC0210002)
+#define STATUS_FVE_TOO_SMALL cpu_to_le32(0xC0210003)
+#define STATUS_FVE_FAILED_WRONG_FS cpu_to_le32(0xC0210004)
+#define STATUS_FVE_FAILED_BAD_FS cpu_to_le32(0xC0210005)
+#define STATUS_FVE_FS_NOT_EXTENDED cpu_to_le32(0xC0210006)
+#define STATUS_FVE_FS_MOUNTED cpu_to_le32(0xC0210007)
+#define STATUS_FVE_NO_LICENSE cpu_to_le32(0xC0210008)
+#define STATUS_FVE_ACTION_NOT_ALLOWED cpu_to_le32(0xC0210009)
+#define STATUS_FVE_BAD_DATA cpu_to_le32(0xC021000A)
+#define STATUS_FVE_VOLUME_NOT_BOUND cpu_to_le32(0xC021000B)
+#define STATUS_FVE_NOT_DATA_VOLUME cpu_to_le32(0xC021000C)
+#define STATUS_FVE_CONV_READ_ERROR cpu_to_le32(0xC021000D)
+#define STATUS_FVE_CONV_WRITE_ERROR cpu_to_le32(0xC021000E)
+#define STATUS_FVE_OVERLAPPED_UPDATE cpu_to_le32(0xC021000F)
+#define STATUS_FVE_FAILED_SECTOR_SIZE cpu_to_le32(0xC0210010)
+#define STATUS_FVE_FAILED_AUTHENTICATION cpu_to_le32(0xC0210011)
+#define STATUS_FVE_NOT_OS_VOLUME cpu_to_le32(0xC0210012)
+#define STATUS_FVE_KEYFILE_NOT_FOUND cpu_to_le32(0xC0210013)
+#define STATUS_FVE_KEYFILE_INVALID cpu_to_le32(0xC0210014)
+#define STATUS_FVE_KEYFILE_NO_VMK cpu_to_le32(0xC0210015)
+#define STATUS_FVE_TPM_DISABLED cpu_to_le32(0xC0210016)
+#define STATUS_FVE_TPM_SRK_AUTH_NOT_ZERO cpu_to_le32(0xC0210017)
+#define STATUS_FVE_TPM_INVALID_PCR cpu_to_le32(0xC0210018)
+#define STATUS_FVE_TPM_NO_VMK cpu_to_le32(0xC0210019)
+#define STATUS_FVE_PIN_INVALID cpu_to_le32(0xC021001A)
+#define STATUS_FVE_AUTH_INVALID_APPLICATION cpu_to_le32(0xC021001B)
+#define STATUS_FVE_AUTH_INVALID_CONFIG cpu_to_le32(0xC021001C)
+#define STATUS_FVE_DEBUGGER_ENABLED cpu_to_le32(0xC021001D)
+#define STATUS_FVE_DRY_RUN_FAILED cpu_to_le32(0xC021001E)
+#define STATUS_FVE_BAD_METADATA_POINTER cpu_to_le32(0xC021001F)
+#define STATUS_FVE_OLD_METADATA_COPY cpu_to_le32(0xC0210020)
+#define STATUS_FVE_REBOOT_REQUIRED cpu_to_le32(0xC0210021)
+#define STATUS_FVE_RAW_ACCESS cpu_to_le32(0xC0210022)
+#define STATUS_FVE_RAW_BLOCKED cpu_to_le32(0xC0210023)
+#define STATUS_FWP_CALLOUT_NOT_FOUND cpu_to_le32(0xC0220001)
+#define STATUS_FWP_CONDITION_NOT_FOUND cpu_to_le32(0xC0220002)
+#define STATUS_FWP_FILTER_NOT_FOUND cpu_to_le32(0xC0220003)
+#define STATUS_FWP_LAYER_NOT_FOUND cpu_to_le32(0xC0220004)
+#define STATUS_FWP_PROVIDER_NOT_FOUND cpu_to_le32(0xC0220005)
+#define STATUS_FWP_PROVIDER_CONTEXT_NOT_FOUND cpu_to_le32(0xC0220006)
+#define STATUS_FWP_SUBLAYER_NOT_FOUND cpu_to_le32(0xC0220007)
+#define STATUS_FWP_NOT_FOUND cpu_to_le32(0xC0220008)
+#define STATUS_FWP_ALREADY_EXISTS cpu_to_le32(0xC0220009)
+#define STATUS_FWP_IN_USE cpu_to_le32(0xC022000A)
+#define STATUS_FWP_DYNAMIC_SESSION_IN_PROGRESS cpu_to_le32(0xC022000B)
+#define STATUS_FWP_WRONG_SESSION cpu_to_le32(0xC022000C)
+#define STATUS_FWP_NO_TXN_IN_PROGRESS cpu_to_le32(0xC022000D)
+#define STATUS_FWP_TXN_IN_PROGRESS cpu_to_le32(0xC022000E)
+#define STATUS_FWP_TXN_ABORTED cpu_to_le32(0xC022000F)
+#define STATUS_FWP_SESSION_ABORTED cpu_to_le32(0xC0220010)
+#define STATUS_FWP_INCOMPATIBLE_TXN cpu_to_le32(0xC0220011)
+#define STATUS_FWP_TIMEOUT cpu_to_le32(0xC0220012)
+#define STATUS_FWP_NET_EVENTS_DISABLED cpu_to_le32(0xC0220013)
+#define STATUS_FWP_INCOMPATIBLE_LAYER cpu_to_le32(0xC0220014)
+#define STATUS_FWP_KM_CLIENTS_ONLY cpu_to_le32(0xC0220015)
+#define STATUS_FWP_LIFETIME_MISMATCH cpu_to_le32(0xC0220016)
+#define STATUS_FWP_BUILTIN_OBJECT cpu_to_le32(0xC0220017)
+#define STATUS_FWP_TOO_MANY_BOOTTIME_FILTERS cpu_to_le32(0xC0220018)
+#define STATUS_FWP_TOO_MANY_CALLOUTS cpu_to_le32(0xC0220018)
+#define STATUS_FWP_NOTIFICATION_DROPPED cpu_to_le32(0xC0220019)
+#define STATUS_FWP_TRAFFIC_MISMATCH cpu_to_le32(0xC022001A)
+#define STATUS_FWP_INCOMPATIBLE_SA_STATE cpu_to_le32(0xC022001B)
+#define STATUS_FWP_NULL_POINTER cpu_to_le32(0xC022001C)
+#define STATUS_FWP_INVALID_ENUMERATOR cpu_to_le32(0xC022001D)
+#define STATUS_FWP_INVALID_FLAGS cpu_to_le32(0xC022001E)
+#define STATUS_FWP_INVALID_NET_MASK cpu_to_le32(0xC022001F)
+#define STATUS_FWP_INVALID_RANGE cpu_to_le32(0xC0220020)
+#define STATUS_FWP_INVALID_INTERVAL cpu_to_le32(0xC0220021)
+#define STATUS_FWP_ZERO_LENGTH_ARRAY cpu_to_le32(0xC0220022)
+#define STATUS_FWP_NULL_DISPLAY_NAME cpu_to_le32(0xC0220023)
+#define STATUS_FWP_INVALID_ACTION_TYPE cpu_to_le32(0xC0220024)
+#define STATUS_FWP_INVALID_WEIGHT cpu_to_le32(0xC0220025)
+#define STATUS_FWP_MATCH_TYPE_MISMATCH cpu_to_le32(0xC0220026)
+#define STATUS_FWP_TYPE_MISMATCH cpu_to_le32(0xC0220027)
+#define STATUS_FWP_OUT_OF_BOUNDS cpu_to_le32(0xC0220028)
+#define STATUS_FWP_RESERVED cpu_to_le32(0xC0220029)
+#define STATUS_FWP_DUPLICATE_CONDITION cpu_to_le32(0xC022002A)
+#define STATUS_FWP_DUPLICATE_KEYMOD cpu_to_le32(0xC022002B)
+#define STATUS_FWP_ACTION_INCOMPATIBLE_WITH_LAYER cpu_to_le32(0xC022002C)
+#define STATUS_FWP_ACTION_INCOMPATIBLE_WITH_SUBLAYER cpu_to_le32(0xC022002D)
+#define STATUS_FWP_CONTEXT_INCOMPATIBLE_WITH_LAYER cpu_to_le32(0xC022002E)
+#define STATUS_FWP_CONTEXT_INCOMPATIBLE_WITH_CALLOUT cpu_to_le32(0xC022002F)
+#define STATUS_FWP_INCOMPATIBLE_AUTH_METHOD cpu_to_le32(0xC0220030)
+#define STATUS_FWP_INCOMPATIBLE_DH_GROUP cpu_to_le32(0xC0220031)
+#define STATUS_FWP_EM_NOT_SUPPORTED cpu_to_le32(0xC0220032)
+#define STATUS_FWP_NEVER_MATCH cpu_to_le32(0xC0220033)
+#define STATUS_FWP_PROVIDER_CONTEXT_MISMATCH cpu_to_le32(0xC0220034)
+#define STATUS_FWP_INVALID_PARAMETER cpu_to_le32(0xC0220035)
+#define STATUS_FWP_TOO_MANY_SUBLAYERS cpu_to_le32(0xC0220036)
+#define STATUS_FWP_CALLOUT_NOTIFICATION_FAILED cpu_to_le32(0xC0220037)
+#define STATUS_FWP_INCOMPATIBLE_AUTH_CONFIG cpu_to_le32(0xC0220038)
+#define STATUS_FWP_INCOMPATIBLE_CIPHER_CONFIG cpu_to_le32(0xC0220039)
+#define STATUS_FWP_TCPIP_NOT_READY cpu_to_le32(0xC0220100)
+#define STATUS_FWP_INJECT_HANDLE_CLOSING cpu_to_le32(0xC0220101)
+#define STATUS_FWP_INJECT_HANDLE_STALE cpu_to_le32(0xC0220102)
+#define STATUS_FWP_CANNOT_PEND cpu_to_le32(0xC0220103)
+#define STATUS_NDIS_CLOSING cpu_to_le32(0xC0230002)
+#define STATUS_NDIS_BAD_VERSION cpu_to_le32(0xC0230004)
+#define STATUS_NDIS_BAD_CHARACTERISTICS cpu_to_le32(0xC0230005)
+#define STATUS_NDIS_ADAPTER_NOT_FOUND cpu_to_le32(0xC0230006)
+#define STATUS_NDIS_OPEN_FAILED cpu_to_le32(0xC0230007)
+#define STATUS_NDIS_DEVICE_FAILED cpu_to_le32(0xC0230008)
+#define STATUS_NDIS_MULTICAST_FULL cpu_to_le32(0xC0230009)
+#define STATUS_NDIS_MULTICAST_EXISTS cpu_to_le32(0xC023000A)
+#define STATUS_NDIS_MULTICAST_NOT_FOUND cpu_to_le32(0xC023000B)
+#define STATUS_NDIS_REQUEST_ABORTED cpu_to_le32(0xC023000C)
+#define STATUS_NDIS_RESET_IN_PROGRESS cpu_to_le32(0xC023000D)
+#define STATUS_NDIS_INVALID_PACKET cpu_to_le32(0xC023000F)
+#define STATUS_NDIS_INVALID_DEVICE_REQUEST cpu_to_le32(0xC0230010)
+#define STATUS_NDIS_ADAPTER_NOT_READY cpu_to_le32(0xC0230011)
+#define STATUS_NDIS_INVALID_LENGTH cpu_to_le32(0xC0230014)
+#define STATUS_NDIS_INVALID_DATA cpu_to_le32(0xC0230015)
+#define STATUS_NDIS_BUFFER_TOO_SHORT cpu_to_le32(0xC0230016)
+#define STATUS_NDIS_INVALID_OID cpu_to_le32(0xC0230017)
+#define STATUS_NDIS_ADAPTER_REMOVED cpu_to_le32(0xC0230018)
+#define STATUS_NDIS_UNSUPPORTED_MEDIA cpu_to_le32(0xC0230019)
+#define STATUS_NDIS_GROUP_ADDRESS_IN_USE cpu_to_le32(0xC023001A)
+#define STATUS_NDIS_FILE_NOT_FOUND cpu_to_le32(0xC023001B)
+#define STATUS_NDIS_ERROR_READING_FILE cpu_to_le32(0xC023001C)
+#define STATUS_NDIS_ALREADY_MAPPED cpu_to_le32(0xC023001D)
+#define STATUS_NDIS_RESOURCE_CONFLICT cpu_to_le32(0xC023001E)
+#define STATUS_NDIS_MEDIA_DISCONNECTED cpu_to_le32(0xC023001F)
+#define STATUS_NDIS_INVALID_ADDRESS cpu_to_le32(0xC0230022)
+#define STATUS_NDIS_PAUSED cpu_to_le32(0xC023002A)
+#define STATUS_NDIS_INTERFACE_NOT_FOUND cpu_to_le32(0xC023002B)
+#define STATUS_NDIS_UNSUPPORTED_REVISION cpu_to_le32(0xC023002C)
+#define STATUS_NDIS_INVALID_PORT cpu_to_le32(0xC023002D)
+#define STATUS_NDIS_INVALID_PORT_STATE cpu_to_le32(0xC023002E)
+#define STATUS_NDIS_LOW_POWER_STATE cpu_to_le32(0xC023002F)
+#define STATUS_NDIS_NOT_SUPPORTED cpu_to_le32(0xC02300BB)
+#define STATUS_NDIS_DOT11_AUTO_CONFIG_ENABLED cpu_to_le32(0xC0232000)
+#define STATUS_NDIS_DOT11_MEDIA_IN_USE cpu_to_le32(0xC0232001)
+#define STATUS_NDIS_DOT11_POWER_STATE_INVALID cpu_to_le32(0xC0232002)
+#define STATUS_IPSEC_BAD_SPI cpu_to_le32(0xC0360001)
+#define STATUS_IPSEC_SA_LIFETIME_EXPIRED cpu_to_le32(0xC0360002)
+#define STATUS_IPSEC_WRONG_SA cpu_to_le32(0xC0360003)
+#define STATUS_IPSEC_REPLAY_CHECK_FAILED cpu_to_le32(0xC0360004)
+#define STATUS_IPSEC_INVALID_PACKET cpu_to_le32(0xC0360005)
+#define STATUS_IPSEC_INTEGRITY_CHECK_FAILED cpu_to_le32(0xC0360006)
+#define STATUS_IPSEC_CLEAR_TEXT_DROP cpu_to_le32(0xC0360007)
diff --git a/fs/smb/client/smb2transport.c b/fs/smb/client/smb2transport.c
new file mode 100644
index 0000000000..5a3ca62d2f
--- /dev/null
+++ b/fs/smb/client/smb2transport.c
@@ -0,0 +1,947 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *
+ *   Copyright (C) International Business Machines  Corp., 2002, 2011
+ *                 Etersoft, 2012
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *              Jeremy Allison (jra@samba.org) 2006
+ *              Pavel Shilovsky (pshilovsky@samba.org) 2012
+ *
+ */
+
+#include <linux/fs.h>
+#include <linux/list.h>
+#include <linux/wait.h>
+#include <linux/net.h>
+#include <linux/delay.h>
+#include <linux/uaccess.h>
+#include <asm/processor.h>
+#include <linux/mempool.h>
+#include <linux/highmem.h>
+#include <crypto/aead.h>
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "smb2proto.h"
+#include "cifs_debug.h"
+#include "smb2status.h"
+#include "smb2glob.h"
+
+static int
+smb3_crypto_shash_allocate(struct TCP_Server_Info *server)
+{
+	struct cifs_secmech *p = &server->secmech;
+	int rc;
+
+	rc = cifs_alloc_hash("hmac(sha256)", &p->hmacsha256);
+	if (rc)
+		goto err;
+
+	rc = cifs_alloc_hash("cmac(aes)", &p->aes_cmac);
+	if (rc)
+		goto err;
+
+	return 0;
+err:
+	cifs_free_hash(&p->hmacsha256);
+	return rc;
+}
+
+int
+smb311_crypto_shash_allocate(struct TCP_Server_Info *server)
+{
+	struct cifs_secmech *p = &server->secmech;
+	int rc = 0;
+
+	rc = cifs_alloc_hash("hmac(sha256)", &p->hmacsha256);
+	if (rc)
+		return rc;
+
+	rc = cifs_alloc_hash("cmac(aes)", &p->aes_cmac);
+	if (rc)
+		goto err;
+
+	rc = cifs_alloc_hash("sha512", &p->sha512);
+	if (rc)
+		goto err;
+
+	return 0;
+
+err:
+	cifs_free_hash(&p->aes_cmac);
+	cifs_free_hash(&p->hmacsha256);
+	return rc;
+}
+
+
+static
+int smb2_get_sign_key(__u64 ses_id, struct TCP_Server_Info *server, u8 *key)
+{
+	struct cifs_chan *chan;
+	struct TCP_Server_Info *pserver;
+	struct cifs_ses *ses = NULL;
+	int i;
+	int rc = 0;
+	bool is_binding = false;
+
+	spin_lock(&cifs_tcp_ses_lock);
+
+	/* If server is a channel, select the primary channel */
+	pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
+
+	list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
+		if (ses->Suid == ses_id)
+			goto found;
+	}
+	trace_smb3_ses_not_found(ses_id);
+	cifs_server_dbg(FYI, "%s: Could not find session 0x%llx\n",
+			__func__, ses_id);
+	rc = -ENOENT;
+	goto out;
+
+found:
+	spin_lock(&ses->ses_lock);
+	spin_lock(&ses->chan_lock);
+
+	is_binding = (cifs_chan_needs_reconnect(ses, server) &&
+		      ses->ses_status == SES_GOOD);
+	if (is_binding) {
+		/*
+		 * If we are in the process of binding a new channel
+		 * to an existing session, use the master connection
+		 * session key
+		 */
+		memcpy(key, ses->smb3signingkey, SMB3_SIGN_KEY_SIZE);
+		spin_unlock(&ses->chan_lock);
+		spin_unlock(&ses->ses_lock);
+		goto out;
+	}
+
+	/*
+	 * Otherwise, use the channel key.
+	 */
+
+	for (i = 0; i < ses->chan_count; i++) {
+		chan = ses->chans + i;
+		if (chan->server == server) {
+			memcpy(key, chan->signkey, SMB3_SIGN_KEY_SIZE);
+			spin_unlock(&ses->chan_lock);
+			spin_unlock(&ses->ses_lock);
+			goto out;
+		}
+	}
+	spin_unlock(&ses->chan_lock);
+	spin_unlock(&ses->ses_lock);
+
+	cifs_dbg(VFS,
+		 "%s: Could not find channel signing key for session 0x%llx\n",
+		 __func__, ses_id);
+	rc = -ENOENT;
+
+out:
+	spin_unlock(&cifs_tcp_ses_lock);
+	return rc;
+}
+
+static struct cifs_ses *
+smb2_find_smb_ses_unlocked(struct TCP_Server_Info *server, __u64 ses_id)
+{
+	struct TCP_Server_Info *pserver;
+	struct cifs_ses *ses;
+
+	/* If server is a channel, select the primary channel */
+	pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
+
+	list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
+		if (ses->Suid != ses_id)
+			continue;
+
+		spin_lock(&ses->ses_lock);
+		if (ses->ses_status == SES_EXITING) {
+			spin_unlock(&ses->ses_lock);
+			continue;
+		}
+		cifs_smb_ses_inc_refcount(ses);
+		spin_unlock(&ses->ses_lock);
+		return ses;
+	}
+
+	return NULL;
+}
+
+struct cifs_ses *
+smb2_find_smb_ses(struct TCP_Server_Info *server, __u64 ses_id)
+{
+	struct cifs_ses *ses;
+
+	spin_lock(&cifs_tcp_ses_lock);
+	ses = smb2_find_smb_ses_unlocked(server, ses_id);
+	spin_unlock(&cifs_tcp_ses_lock);
+
+	return ses;
+}
+
+static struct cifs_tcon *
+smb2_find_smb_sess_tcon_unlocked(struct cifs_ses *ses, __u32  tid)
+{
+	struct cifs_tcon *tcon;
+
+	list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
+		if (tcon->tid != tid)
+			continue;
+		++tcon->tc_count;
+		return tcon;
+	}
+
+	return NULL;
+}
+
+/*
+ * Obtain tcon corresponding to the tid in the given
+ * cifs_ses
+ */
+
+struct cifs_tcon *
+smb2_find_smb_tcon(struct TCP_Server_Info *server, __u64 ses_id, __u32  tid)
+{
+	struct cifs_ses *ses;
+	struct cifs_tcon *tcon;
+
+	spin_lock(&cifs_tcp_ses_lock);
+	ses = smb2_find_smb_ses_unlocked(server, ses_id);
+	if (!ses) {
+		spin_unlock(&cifs_tcp_ses_lock);
+		return NULL;
+	}
+	tcon = smb2_find_smb_sess_tcon_unlocked(ses, tid);
+	if (!tcon) {
+		cifs_put_smb_ses(ses);
+		spin_unlock(&cifs_tcp_ses_lock);
+		return NULL;
+	}
+	spin_unlock(&cifs_tcp_ses_lock);
+	/* tcon already has a ref to ses, so we don't need ses anymore */
+	cifs_put_smb_ses(ses);
+
+	return tcon;
+}
+
+int
+smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server,
+			bool allocate_crypto)
+{
+	int rc;
+	unsigned char smb2_signature[SMB2_HMACSHA256_SIZE];
+	unsigned char *sigptr = smb2_signature;
+	struct kvec *iov = rqst->rq_iov;
+	struct smb2_hdr *shdr = (struct smb2_hdr *)iov[0].iov_base;
+	struct cifs_ses *ses;
+	struct shash_desc *shash = NULL;
+	struct smb_rqst drqst;
+
+	ses = smb2_find_smb_ses(server, le64_to_cpu(shdr->SessionId));
+	if (unlikely(!ses)) {
+		cifs_server_dbg(VFS, "%s: Could not find session\n", __func__);
+		return -ENOENT;
+	}
+
+	memset(smb2_signature, 0x0, SMB2_HMACSHA256_SIZE);
+	memset(shdr->Signature, 0x0, SMB2_SIGNATURE_SIZE);
+
+	if (allocate_crypto) {
+		rc = cifs_alloc_hash("hmac(sha256)", &shash);
+		if (rc) {
+			cifs_server_dbg(VFS,
+					"%s: sha256 alloc failed\n", __func__);
+			goto out;
+		}
+	} else {
+		shash = server->secmech.hmacsha256;
+	}
+
+	rc = crypto_shash_setkey(shash->tfm, ses->auth_key.response,
+			SMB2_NTLMV2_SESSKEY_SIZE);
+	if (rc) {
+		cifs_server_dbg(VFS,
+				"%s: Could not update with response\n",
+				__func__);
+		goto out;
+	}
+
+	rc = crypto_shash_init(shash);
+	if (rc) {
+		cifs_server_dbg(VFS, "%s: Could not init sha256", __func__);
+		goto out;
+	}
+
+	/*
+	 * For SMB2+, __cifs_calc_signature() expects to sign only the actual
+	 * data, that is, iov[0] should not contain a rfc1002 length.
+	 *
+	 * Sign the rfc1002 length prior to passing the data (iov[1-N]) down to
+	 * __cifs_calc_signature().
+	 */
+	drqst = *rqst;
+	if (drqst.rq_nvec >= 2 && iov[0].iov_len == 4) {
+		rc = crypto_shash_update(shash, iov[0].iov_base,
+					 iov[0].iov_len);
+		if (rc) {
+			cifs_server_dbg(VFS,
+					"%s: Could not update with payload\n",
+					__func__);
+			goto out;
+		}
+		drqst.rq_iov++;
+		drqst.rq_nvec--;
+	}
+
+	rc = __cifs_calc_signature(&drqst, server, sigptr, shash);
+	if (!rc)
+		memcpy(shdr->Signature, sigptr, SMB2_SIGNATURE_SIZE);
+
+out:
+	if (allocate_crypto)
+		cifs_free_hash(&shash);
+	if (ses)
+		cifs_put_smb_ses(ses);
+	return rc;
+}
+
+static int generate_key(struct cifs_ses *ses, struct kvec label,
+			struct kvec context, __u8 *key, unsigned int key_size)
+{
+	unsigned char zero = 0x0;
+	__u8 i[4] = {0, 0, 0, 1};
+	__u8 L128[4] = {0, 0, 0, 128};
+	__u8 L256[4] = {0, 0, 1, 0};
+	int rc = 0;
+	unsigned char prfhash[SMB2_HMACSHA256_SIZE];
+	unsigned char *hashptr = prfhash;
+	struct TCP_Server_Info *server = ses->server;
+
+	memset(prfhash, 0x0, SMB2_HMACSHA256_SIZE);
+	memset(key, 0x0, key_size);
+
+	rc = smb3_crypto_shash_allocate(server);
+	if (rc) {
+		cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
+		goto smb3signkey_ret;
+	}
+
+	rc = crypto_shash_setkey(server->secmech.hmacsha256->tfm,
+		ses->auth_key.response, SMB2_NTLMV2_SESSKEY_SIZE);
+	if (rc) {
+		cifs_server_dbg(VFS, "%s: Could not set with session key\n", __func__);
+		goto smb3signkey_ret;
+	}
+
+	rc = crypto_shash_init(server->secmech.hmacsha256);
+	if (rc) {
+		cifs_server_dbg(VFS, "%s: Could not init sign hmac\n", __func__);
+		goto smb3signkey_ret;
+	}
+
+	rc = crypto_shash_update(server->secmech.hmacsha256, i, 4);
+	if (rc) {
+		cifs_server_dbg(VFS, "%s: Could not update with n\n", __func__);
+		goto smb3signkey_ret;
+	}
+
+	rc = crypto_shash_update(server->secmech.hmacsha256, label.iov_base, label.iov_len);
+	if (rc) {
+		cifs_server_dbg(VFS, "%s: Could not update with label\n", __func__);
+		goto smb3signkey_ret;
+	}
+
+	rc = crypto_shash_update(server->secmech.hmacsha256, &zero, 1);
+	if (rc) {
+		cifs_server_dbg(VFS, "%s: Could not update with zero\n", __func__);
+		goto smb3signkey_ret;
+	}
+
+	rc = crypto_shash_update(server->secmech.hmacsha256, context.iov_base, context.iov_len);
+	if (rc) {
+		cifs_server_dbg(VFS, "%s: Could not update with context\n", __func__);
+		goto smb3signkey_ret;
+	}
+
+	if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
+		(server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) {
+		rc = crypto_shash_update(server->secmech.hmacsha256, L256, 4);
+	} else {
+		rc = crypto_shash_update(server->secmech.hmacsha256, L128, 4);
+	}
+	if (rc) {
+		cifs_server_dbg(VFS, "%s: Could not update with L\n", __func__);
+		goto smb3signkey_ret;
+	}
+
+	rc = crypto_shash_final(server->secmech.hmacsha256, hashptr);
+	if (rc) {
+		cifs_server_dbg(VFS, "%s: Could not generate sha256 hash\n", __func__);
+		goto smb3signkey_ret;
+	}
+
+	memcpy(key, hashptr, key_size);
+
+smb3signkey_ret:
+	return rc;
+}
+
+struct derivation {
+	struct kvec label;
+	struct kvec context;
+};
+
+struct derivation_triplet {
+	struct derivation signing;
+	struct derivation encryption;
+	struct derivation decryption;
+};
+
+static int
+generate_smb3signingkey(struct cifs_ses *ses,
+			struct TCP_Server_Info *server,
+			const struct derivation_triplet *ptriplet)
+{
+	int rc;
+	bool is_binding = false;
+	int chan_index = 0;
+
+	spin_lock(&ses->ses_lock);
+	spin_lock(&ses->chan_lock);
+	is_binding = (cifs_chan_needs_reconnect(ses, server) &&
+		      ses->ses_status == SES_GOOD);
+
+	chan_index = cifs_ses_get_chan_index(ses, server);
+	if (chan_index == CIFS_INVAL_CHAN_INDEX) {
+		spin_unlock(&ses->chan_lock);
+		spin_unlock(&ses->ses_lock);
+
+		return -EINVAL;
+	}
+
+	spin_unlock(&ses->chan_lock);
+	spin_unlock(&ses->ses_lock);
+
+	/*
+	 * All channels use the same encryption/decryption keys but
+	 * they have their own signing key.
+	 *
+	 * When we generate the keys, check if it is for a new channel
+	 * (binding) in which case we only need to generate a signing
+	 * key and store it in the channel as to not overwrite the
+	 * master connection signing key stored in the session
+	 */
+
+	if (is_binding) {
+		rc = generate_key(ses, ptriplet->signing.label,
+				  ptriplet->signing.context,
+				  ses->chans[chan_index].signkey,
+				  SMB3_SIGN_KEY_SIZE);
+		if (rc)
+			return rc;
+	} else {
+		rc = generate_key(ses, ptriplet->signing.label,
+				  ptriplet->signing.context,
+				  ses->smb3signingkey,
+				  SMB3_SIGN_KEY_SIZE);
+		if (rc)
+			return rc;
+
+		/* safe to access primary channel, since it will never go away */
+		spin_lock(&ses->chan_lock);
+		memcpy(ses->chans[chan_index].signkey, ses->smb3signingkey,
+		       SMB3_SIGN_KEY_SIZE);
+		spin_unlock(&ses->chan_lock);
+
+		rc = generate_key(ses, ptriplet->encryption.label,
+				  ptriplet->encryption.context,
+				  ses->smb3encryptionkey,
+				  SMB3_ENC_DEC_KEY_SIZE);
+		if (rc)
+			return rc;
+		rc = generate_key(ses, ptriplet->decryption.label,
+				  ptriplet->decryption.context,
+				  ses->smb3decryptionkey,
+				  SMB3_ENC_DEC_KEY_SIZE);
+		if (rc)
+			return rc;
+	}
+
+#ifdef CONFIG_CIFS_DEBUG_DUMP_KEYS
+	cifs_dbg(VFS, "%s: dumping generated AES session keys\n", __func__);
+	/*
+	 * The session id is opaque in terms of endianness, so we can't
+	 * print it as a long long. we dump it as we got it on the wire
+	 */
+	cifs_dbg(VFS, "Session Id    %*ph\n", (int)sizeof(ses->Suid),
+			&ses->Suid);
+	cifs_dbg(VFS, "Cipher type   %d\n", server->cipher_type);
+	cifs_dbg(VFS, "Session Key   %*ph\n",
+		 SMB2_NTLMV2_SESSKEY_SIZE, ses->auth_key.response);
+	cifs_dbg(VFS, "Signing Key   %*ph\n",
+		 SMB3_SIGN_KEY_SIZE, ses->smb3signingkey);
+	if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
+		(server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) {
+		cifs_dbg(VFS, "ServerIn Key  %*ph\n",
+				SMB3_GCM256_CRYPTKEY_SIZE, ses->smb3encryptionkey);
+		cifs_dbg(VFS, "ServerOut Key %*ph\n",
+				SMB3_GCM256_CRYPTKEY_SIZE, ses->smb3decryptionkey);
+	} else {
+		cifs_dbg(VFS, "ServerIn Key  %*ph\n",
+				SMB3_GCM128_CRYPTKEY_SIZE, ses->smb3encryptionkey);
+		cifs_dbg(VFS, "ServerOut Key %*ph\n",
+				SMB3_GCM128_CRYPTKEY_SIZE, ses->smb3decryptionkey);
+	}
+#endif
+	return rc;
+}
+
+int
+generate_smb30signingkey(struct cifs_ses *ses,
+			 struct TCP_Server_Info *server)
+
+{
+	struct derivation_triplet triplet;
+	struct derivation *d;
+
+	d = &triplet.signing;
+	d->label.iov_base = "SMB2AESCMAC";
+	d->label.iov_len = 12;
+	d->context.iov_base = "SmbSign";
+	d->context.iov_len = 8;
+
+	d = &triplet.encryption;
+	d->label.iov_base = "SMB2AESCCM";
+	d->label.iov_len = 11;
+	d->context.iov_base = "ServerIn ";
+	d->context.iov_len = 10;
+
+	d = &triplet.decryption;
+	d->label.iov_base = "SMB2AESCCM";
+	d->label.iov_len = 11;
+	d->context.iov_base = "ServerOut";
+	d->context.iov_len = 10;
+
+	return generate_smb3signingkey(ses, server, &triplet);
+}
+
+int
+generate_smb311signingkey(struct cifs_ses *ses,
+			  struct TCP_Server_Info *server)
+
+{
+	struct derivation_triplet triplet;
+	struct derivation *d;
+
+	d = &triplet.signing;
+	d->label.iov_base = "SMBSigningKey";
+	d->label.iov_len = 14;
+	d->context.iov_base = ses->preauth_sha_hash;
+	d->context.iov_len = 64;
+
+	d = &triplet.encryption;
+	d->label.iov_base = "SMBC2SCipherKey";
+	d->label.iov_len = 16;
+	d->context.iov_base = ses->preauth_sha_hash;
+	d->context.iov_len = 64;
+
+	d = &triplet.decryption;
+	d->label.iov_base = "SMBS2CCipherKey";
+	d->label.iov_len = 16;
+	d->context.iov_base = ses->preauth_sha_hash;
+	d->context.iov_len = 64;
+
+	return generate_smb3signingkey(ses, server, &triplet);
+}
+
+int
+smb3_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server,
+			bool allocate_crypto)
+{
+	int rc;
+	unsigned char smb3_signature[SMB2_CMACAES_SIZE];
+	unsigned char *sigptr = smb3_signature;
+	struct kvec *iov = rqst->rq_iov;
+	struct smb2_hdr *shdr = (struct smb2_hdr *)iov[0].iov_base;
+	struct shash_desc *shash = NULL;
+	struct smb_rqst drqst;
+	u8 key[SMB3_SIGN_KEY_SIZE];
+
+	rc = smb2_get_sign_key(le64_to_cpu(shdr->SessionId), server, key);
+	if (unlikely(rc)) {
+		cifs_server_dbg(FYI, "%s: Could not get signing key\n", __func__);
+		return rc;
+	}
+
+	if (allocate_crypto) {
+		rc = cifs_alloc_hash("cmac(aes)", &shash);
+		if (rc)
+			return rc;
+	} else {
+		shash = server->secmech.aes_cmac;
+	}
+
+	memset(smb3_signature, 0x0, SMB2_CMACAES_SIZE);
+	memset(shdr->Signature, 0x0, SMB2_SIGNATURE_SIZE);
+
+	rc = crypto_shash_setkey(shash->tfm, key, SMB2_CMACAES_SIZE);
+	if (rc) {
+		cifs_server_dbg(VFS, "%s: Could not set key for cmac aes\n", __func__);
+		goto out;
+	}
+
+	/*
+	 * we already allocate aes_cmac when we init smb3 signing key,
+	 * so unlike smb2 case we do not have to check here if secmech are
+	 * initialized
+	 */
+	rc = crypto_shash_init(shash);
+	if (rc) {
+		cifs_server_dbg(VFS, "%s: Could not init cmac aes\n", __func__);
+		goto out;
+	}
+
+	/*
+	 * For SMB2+, __cifs_calc_signature() expects to sign only the actual
+	 * data, that is, iov[0] should not contain a rfc1002 length.
+	 *
+	 * Sign the rfc1002 length prior to passing the data (iov[1-N]) down to
+	 * __cifs_calc_signature().
+	 */
+	drqst = *rqst;
+	if (drqst.rq_nvec >= 2 && iov[0].iov_len == 4) {
+		rc = crypto_shash_update(shash, iov[0].iov_base,
+					 iov[0].iov_len);
+		if (rc) {
+			cifs_server_dbg(VFS, "%s: Could not update with payload\n",
+				 __func__);
+			goto out;
+		}
+		drqst.rq_iov++;
+		drqst.rq_nvec--;
+	}
+
+	rc = __cifs_calc_signature(&drqst, server, sigptr, shash);
+	if (!rc)
+		memcpy(shdr->Signature, sigptr, SMB2_SIGNATURE_SIZE);
+
+out:
+	if (allocate_crypto)
+		cifs_free_hash(&shash);
+	return rc;
+}
+
+/* must be called with server->srv_mutex held */
+static int
+smb2_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server)
+{
+	int rc = 0;
+	struct smb2_hdr *shdr;
+	struct smb2_sess_setup_req *ssr;
+	bool is_binding;
+	bool is_signed;
+
+	shdr = (struct smb2_hdr *)rqst->rq_iov[0].iov_base;
+	ssr = (struct smb2_sess_setup_req *)shdr;
+
+	is_binding = shdr->Command == SMB2_SESSION_SETUP &&
+		(ssr->Flags & SMB2_SESSION_REQ_FLAG_BINDING);
+	is_signed = shdr->Flags & SMB2_FLAGS_SIGNED;
+
+	if (!is_signed)
+		return 0;
+	spin_lock(&server->srv_lock);
+	if (server->ops->need_neg &&
+	    server->ops->need_neg(server)) {
+		spin_unlock(&server->srv_lock);
+		return 0;
+	}
+	spin_unlock(&server->srv_lock);
+	if (!is_binding && !server->session_estab) {
+		strncpy(shdr->Signature, "BSRSPYL", 8);
+		return 0;
+	}
+
+	rc = server->ops->calc_signature(rqst, server, false);
+
+	return rc;
+}
+
+int
+smb2_verify_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
+{
+	unsigned int rc;
+	char server_response_sig[SMB2_SIGNATURE_SIZE];
+	struct smb2_hdr *shdr =
+			(struct smb2_hdr *)rqst->rq_iov[0].iov_base;
+
+	if ((shdr->Command == SMB2_NEGOTIATE) ||
+	    (shdr->Command == SMB2_SESSION_SETUP) ||
+	    (shdr->Command == SMB2_OPLOCK_BREAK) ||
+	    server->ignore_signature ||
+	    (!server->session_estab))
+		return 0;
+
+	/*
+	 * BB what if signatures are supposed to be on for session but
+	 * server does not send one? BB
+	 */
+
+	/* Do not need to verify session setups with signature "BSRSPYL " */
+	if (memcmp(shdr->Signature, "BSRSPYL ", 8) == 0)
+		cifs_dbg(FYI, "dummy signature received for smb command 0x%x\n",
+			 shdr->Command);
+
+	/*
+	 * Save off the origiginal signature so we can modify the smb and check
+	 * our calculated signature against what the server sent.
+	 */
+	memcpy(server_response_sig, shdr->Signature, SMB2_SIGNATURE_SIZE);
+
+	memset(shdr->Signature, 0, SMB2_SIGNATURE_SIZE);
+
+	rc = server->ops->calc_signature(rqst, server, true);
+
+	if (rc)
+		return rc;
+
+	if (memcmp(server_response_sig, shdr->Signature, SMB2_SIGNATURE_SIZE)) {
+		cifs_dbg(VFS, "sign fail cmd 0x%x message id 0x%llx\n",
+			shdr->Command, shdr->MessageId);
+		return -EACCES;
+	} else
+		return 0;
+}
+
+/*
+ * Set message id for the request. Should be called after wait_for_free_request
+ * and when srv_mutex is held.
+ */
+static inline void
+smb2_seq_num_into_buf(struct TCP_Server_Info *server,
+		      struct smb2_hdr *shdr)
+{
+	unsigned int i, num = le16_to_cpu(shdr->CreditCharge);
+
+	shdr->MessageId = get_next_mid64(server);
+	/* skip message numbers according to CreditCharge field */
+	for (i = 1; i < num; i++)
+		get_next_mid(server);
+}
+
+static struct mid_q_entry *
+smb2_mid_entry_alloc(const struct smb2_hdr *shdr,
+		     struct TCP_Server_Info *server)
+{
+	struct mid_q_entry *temp;
+	unsigned int credits = le16_to_cpu(shdr->CreditCharge);
+
+	if (server == NULL) {
+		cifs_dbg(VFS, "Null TCP session in smb2_mid_entry_alloc\n");
+		return NULL;
+	}
+
+	temp = mempool_alloc(cifs_mid_poolp, GFP_NOFS);
+	memset(temp, 0, sizeof(struct mid_q_entry));
+	kref_init(&temp->refcount);
+	temp->mid = le64_to_cpu(shdr->MessageId);
+	temp->credits = credits > 0 ? credits : 1;
+	temp->pid = current->pid;
+	temp->command = shdr->Command; /* Always LE */
+	temp->when_alloc = jiffies;
+	temp->server = server;
+
+	/*
+	 * The default is for the mid to be synchronous, so the
+	 * default callback just wakes up the current task.
+	 */
+	get_task_struct(current);
+	temp->creator = current;
+	temp->callback = cifs_wake_up_task;
+	temp->callback_data = current;
+
+	atomic_inc(&mid_count);
+	temp->mid_state = MID_REQUEST_ALLOCATED;
+	trace_smb3_cmd_enter(le32_to_cpu(shdr->Id.SyncId.TreeId),
+			     le64_to_cpu(shdr->SessionId),
+			     le16_to_cpu(shdr->Command), temp->mid);
+	return temp;
+}
+
+static int
+smb2_get_mid_entry(struct cifs_ses *ses, struct TCP_Server_Info *server,
+		   struct smb2_hdr *shdr, struct mid_q_entry **mid)
+{
+	spin_lock(&server->srv_lock);
+	if (server->tcpStatus == CifsExiting) {
+		spin_unlock(&server->srv_lock);
+		return -ENOENT;
+	}
+
+	if (server->tcpStatus == CifsNeedReconnect) {
+		spin_unlock(&server->srv_lock);
+		cifs_dbg(FYI, "tcp session dead - return to caller to retry\n");
+		return -EAGAIN;
+	}
+
+	if (server->tcpStatus == CifsNeedNegotiate &&
+	   shdr->Command != SMB2_NEGOTIATE) {
+		spin_unlock(&server->srv_lock);
+		return -EAGAIN;
+	}
+	spin_unlock(&server->srv_lock);
+
+	spin_lock(&ses->ses_lock);
+	if (ses->ses_status == SES_NEW) {
+		if ((shdr->Command != SMB2_SESSION_SETUP) &&
+		    (shdr->Command != SMB2_NEGOTIATE)) {
+			spin_unlock(&ses->ses_lock);
+			return -EAGAIN;
+		}
+		/* else ok - we are setting up session */
+	}
+
+	if (ses->ses_status == SES_EXITING) {
+		if (shdr->Command != SMB2_LOGOFF) {
+			spin_unlock(&ses->ses_lock);
+			return -EAGAIN;
+		}
+		/* else ok - we are shutting down the session */
+	}
+	spin_unlock(&ses->ses_lock);
+
+	*mid = smb2_mid_entry_alloc(shdr, server);
+	if (*mid == NULL)
+		return -ENOMEM;
+	spin_lock(&server->mid_lock);
+	list_add_tail(&(*mid)->qhead, &server->pending_mid_q);
+	spin_unlock(&server->mid_lock);
+
+	return 0;
+}
+
+int
+smb2_check_receive(struct mid_q_entry *mid, struct TCP_Server_Info *server,
+		   bool log_error)
+{
+	unsigned int len = mid->resp_buf_size;
+	struct kvec iov[1];
+	struct smb_rqst rqst = { .rq_iov = iov,
+				 .rq_nvec = 1 };
+
+	iov[0].iov_base = (char *)mid->resp_buf;
+	iov[0].iov_len = len;
+
+	dump_smb(mid->resp_buf, min_t(u32, 80, len));
+	/* convert the length into a more usable form */
+	if (len > 24 && server->sign && !mid->decrypted) {
+		int rc;
+
+		rc = smb2_verify_signature(&rqst, server);
+		if (rc)
+			cifs_server_dbg(VFS, "SMB signature verification returned error = %d\n",
+				 rc);
+	}
+
+	return map_smb2_to_linux_error(mid->resp_buf, log_error);
+}
+
+struct mid_q_entry *
+smb2_setup_request(struct cifs_ses *ses, struct TCP_Server_Info *server,
+		   struct smb_rqst *rqst)
+{
+	int rc;
+	struct smb2_hdr *shdr =
+			(struct smb2_hdr *)rqst->rq_iov[0].iov_base;
+	struct mid_q_entry *mid;
+
+	smb2_seq_num_into_buf(server, shdr);
+
+	rc = smb2_get_mid_entry(ses, server, shdr, &mid);
+	if (rc) {
+		revert_current_mid_from_hdr(server, shdr);
+		return ERR_PTR(rc);
+	}
+
+	rc = smb2_sign_rqst(rqst, server);
+	if (rc) {
+		revert_current_mid_from_hdr(server, shdr);
+		delete_mid(mid);
+		return ERR_PTR(rc);
+	}
+
+	return mid;
+}
+
+struct mid_q_entry *
+smb2_setup_async_request(struct TCP_Server_Info *server, struct smb_rqst *rqst)
+{
+	int rc;
+	struct smb2_hdr *shdr =
+			(struct smb2_hdr *)rqst->rq_iov[0].iov_base;
+	struct mid_q_entry *mid;
+
+	spin_lock(&server->srv_lock);
+	if (server->tcpStatus == CifsNeedNegotiate &&
+	   shdr->Command != SMB2_NEGOTIATE) {
+		spin_unlock(&server->srv_lock);
+		return ERR_PTR(-EAGAIN);
+	}
+	spin_unlock(&server->srv_lock);
+
+	smb2_seq_num_into_buf(server, shdr);
+
+	mid = smb2_mid_entry_alloc(shdr, server);
+	if (mid == NULL) {
+		revert_current_mid_from_hdr(server, shdr);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	rc = smb2_sign_rqst(rqst, server);
+	if (rc) {
+		revert_current_mid_from_hdr(server, shdr);
+		release_mid(mid);
+		return ERR_PTR(rc);
+	}
+
+	return mid;
+}
+
+int
+smb3_crypto_aead_allocate(struct TCP_Server_Info *server)
+{
+	struct crypto_aead *tfm;
+
+	if (!server->secmech.enc) {
+		if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
+		    (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
+			tfm = crypto_alloc_aead("gcm(aes)", 0, 0);
+		else
+			tfm = crypto_alloc_aead("ccm(aes)", 0, 0);
+		if (IS_ERR(tfm)) {
+			cifs_server_dbg(VFS, "%s: Failed alloc encrypt aead\n",
+				 __func__);
+			return PTR_ERR(tfm);
+		}
+		server->secmech.enc = tfm;
+	}
+
+	if (!server->secmech.dec) {
+		if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
+		    (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
+			tfm = crypto_alloc_aead("gcm(aes)", 0, 0);
+		else
+			tfm = crypto_alloc_aead("ccm(aes)", 0, 0);
+		if (IS_ERR(tfm)) {
+			crypto_free_aead(server->secmech.enc);
+			server->secmech.enc = NULL;
+			cifs_server_dbg(VFS, "%s: Failed to alloc decrypt aead\n",
+				 __func__);
+			return PTR_ERR(tfm);
+		}
+		server->secmech.dec = tfm;
+	}
+
+	return 0;
+}
diff --git a/fs/smb/client/smbdirect.c b/fs/smb/client/smbdirect.c
new file mode 100644
index 0000000000..94df9eec3d
--- /dev/null
+++ b/fs/smb/client/smbdirect.c
@@ -0,0 +1,2614 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *   Copyright (C) 2017, Microsoft Corporation.
+ *
+ *   Author(s): Long Li <longli@microsoft.com>
+ */
+#include <linux/module.h>
+#include <linux/highmem.h>
+#include "smbdirect.h"
+#include "cifs_debug.h"
+#include "cifsproto.h"
+#include "smb2proto.h"
+
+static struct smbd_response *get_empty_queue_buffer(
+		struct smbd_connection *info);
+static struct smbd_response *get_receive_buffer(
+		struct smbd_connection *info);
+static void put_receive_buffer(
+		struct smbd_connection *info,
+		struct smbd_response *response);
+static int allocate_receive_buffers(struct smbd_connection *info, int num_buf);
+static void destroy_receive_buffers(struct smbd_connection *info);
+
+static void put_empty_packet(
+		struct smbd_connection *info, struct smbd_response *response);
+static void enqueue_reassembly(
+		struct smbd_connection *info,
+		struct smbd_response *response, int data_length);
+static struct smbd_response *_get_first_reassembly(
+		struct smbd_connection *info);
+
+static int smbd_post_recv(
+		struct smbd_connection *info,
+		struct smbd_response *response);
+
+static int smbd_post_send_empty(struct smbd_connection *info);
+
+static void destroy_mr_list(struct smbd_connection *info);
+static int allocate_mr_list(struct smbd_connection *info);
+
+struct smb_extract_to_rdma {
+	struct ib_sge		*sge;
+	unsigned int		nr_sge;
+	unsigned int		max_sge;
+	struct ib_device	*device;
+	u32			local_dma_lkey;
+	enum dma_data_direction	direction;
+};
+static ssize_t smb_extract_iter_to_rdma(struct iov_iter *iter, size_t len,
+					struct smb_extract_to_rdma *rdma);
+
+/* SMBD version number */
+#define SMBD_V1	0x0100
+
+/* Port numbers for SMBD transport */
+#define SMB_PORT	445
+#define SMBD_PORT	5445
+
+/* Address lookup and resolve timeout in ms */
+#define RDMA_RESOLVE_TIMEOUT	5000
+
+/* SMBD negotiation timeout in seconds */
+#define SMBD_NEGOTIATE_TIMEOUT	120
+
+/* SMBD minimum receive size and fragmented sized defined in [MS-SMBD] */
+#define SMBD_MIN_RECEIVE_SIZE		128
+#define SMBD_MIN_FRAGMENTED_SIZE	131072
+
+/*
+ * Default maximum number of RDMA read/write outstanding on this connection
+ * This value is possibly decreased during QP creation on hardware limit
+ */
+#define SMBD_CM_RESPONDER_RESOURCES	32
+
+/* Maximum number of retries on data transfer operations */
+#define SMBD_CM_RETRY			6
+/* No need to retry on Receiver Not Ready since SMBD manages credits */
+#define SMBD_CM_RNR_RETRY		0
+
+/*
+ * User configurable initial values per SMBD transport connection
+ * as defined in [MS-SMBD] 3.1.1.1
+ * Those may change after a SMBD negotiation
+ */
+/* The local peer's maximum number of credits to grant to the peer */
+int smbd_receive_credit_max = 255;
+
+/* The remote peer's credit request of local peer */
+int smbd_send_credit_target = 255;
+
+/* The maximum single message size can be sent to remote peer */
+int smbd_max_send_size = 1364;
+
+/*  The maximum fragmented upper-layer payload receive size supported */
+int smbd_max_fragmented_recv_size = 1024 * 1024;
+
+/*  The maximum single-message size which can be received */
+int smbd_max_receive_size = 1364;
+
+/* The timeout to initiate send of a keepalive message on idle */
+int smbd_keep_alive_interval = 120;
+
+/*
+ * User configurable initial values for RDMA transport
+ * The actual values used may be lower and are limited to hardware capabilities
+ */
+/* Default maximum number of pages in a single RDMA write/read */
+int smbd_max_frmr_depth = 2048;
+
+/* If payload is less than this byte, use RDMA send/recv not read/write */
+int rdma_readwrite_threshold = 4096;
+
+/* Transport logging functions
+ * Logging are defined as classes. They can be OR'ed to define the actual
+ * logging level via module parameter smbd_logging_class
+ * e.g. cifs.smbd_logging_class=0xa0 will log all log_rdma_recv() and
+ * log_rdma_event()
+ */
+#define LOG_OUTGOING			0x1
+#define LOG_INCOMING			0x2
+#define LOG_READ			0x4
+#define LOG_WRITE			0x8
+#define LOG_RDMA_SEND			0x10
+#define LOG_RDMA_RECV			0x20
+#define LOG_KEEP_ALIVE			0x40
+#define LOG_RDMA_EVENT			0x80
+#define LOG_RDMA_MR			0x100
+static unsigned int smbd_logging_class;
+module_param(smbd_logging_class, uint, 0644);
+MODULE_PARM_DESC(smbd_logging_class,
+	"Logging class for SMBD transport 0x0 to 0x100");
+
+#define ERR		0x0
+#define INFO		0x1
+static unsigned int smbd_logging_level = ERR;
+module_param(smbd_logging_level, uint, 0644);
+MODULE_PARM_DESC(smbd_logging_level,
+	"Logging level for SMBD transport, 0 (default): error, 1: info");
+
+#define log_rdma(level, class, fmt, args...)				\
+do {									\
+	if (level <= smbd_logging_level || class & smbd_logging_class)	\
+		cifs_dbg(VFS, "%s:%d " fmt, __func__, __LINE__, ##args);\
+} while (0)
+
+#define log_outgoing(level, fmt, args...) \
+		log_rdma(level, LOG_OUTGOING, fmt, ##args)
+#define log_incoming(level, fmt, args...) \
+		log_rdma(level, LOG_INCOMING, fmt, ##args)
+#define log_read(level, fmt, args...)	log_rdma(level, LOG_READ, fmt, ##args)
+#define log_write(level, fmt, args...)	log_rdma(level, LOG_WRITE, fmt, ##args)
+#define log_rdma_send(level, fmt, args...) \
+		log_rdma(level, LOG_RDMA_SEND, fmt, ##args)
+#define log_rdma_recv(level, fmt, args...) \
+		log_rdma(level, LOG_RDMA_RECV, fmt, ##args)
+#define log_keep_alive(level, fmt, args...) \
+		log_rdma(level, LOG_KEEP_ALIVE, fmt, ##args)
+#define log_rdma_event(level, fmt, args...) \
+		log_rdma(level, LOG_RDMA_EVENT, fmt, ##args)
+#define log_rdma_mr(level, fmt, args...) \
+		log_rdma(level, LOG_RDMA_MR, fmt, ##args)
+
+static void smbd_disconnect_rdma_work(struct work_struct *work)
+{
+	struct smbd_connection *info =
+		container_of(work, struct smbd_connection, disconnect_work);
+
+	if (info->transport_status == SMBD_CONNECTED) {
+		info->transport_status = SMBD_DISCONNECTING;
+		rdma_disconnect(info->id);
+	}
+}
+
+static void smbd_disconnect_rdma_connection(struct smbd_connection *info)
+{
+	queue_work(info->workqueue, &info->disconnect_work);
+}
+
+/* Upcall from RDMA CM */
+static int smbd_conn_upcall(
+		struct rdma_cm_id *id, struct rdma_cm_event *event)
+{
+	struct smbd_connection *info = id->context;
+
+	log_rdma_event(INFO, "event=%d status=%d\n",
+		event->event, event->status);
+
+	switch (event->event) {
+	case RDMA_CM_EVENT_ADDR_RESOLVED:
+	case RDMA_CM_EVENT_ROUTE_RESOLVED:
+		info->ri_rc = 0;
+		complete(&info->ri_done);
+		break;
+
+	case RDMA_CM_EVENT_ADDR_ERROR:
+		info->ri_rc = -EHOSTUNREACH;
+		complete(&info->ri_done);
+		break;
+
+	case RDMA_CM_EVENT_ROUTE_ERROR:
+		info->ri_rc = -ENETUNREACH;
+		complete(&info->ri_done);
+		break;
+
+	case RDMA_CM_EVENT_ESTABLISHED:
+		log_rdma_event(INFO, "connected event=%d\n", event->event);
+		info->transport_status = SMBD_CONNECTED;
+		wake_up_interruptible(&info->conn_wait);
+		break;
+
+	case RDMA_CM_EVENT_CONNECT_ERROR:
+	case RDMA_CM_EVENT_UNREACHABLE:
+	case RDMA_CM_EVENT_REJECTED:
+		log_rdma_event(INFO, "connecting failed event=%d\n", event->event);
+		info->transport_status = SMBD_DISCONNECTED;
+		wake_up_interruptible(&info->conn_wait);
+		break;
+
+	case RDMA_CM_EVENT_DEVICE_REMOVAL:
+	case RDMA_CM_EVENT_DISCONNECTED:
+		/* This happenes when we fail the negotiation */
+		if (info->transport_status == SMBD_NEGOTIATE_FAILED) {
+			info->transport_status = SMBD_DISCONNECTED;
+			wake_up(&info->conn_wait);
+			break;
+		}
+
+		info->transport_status = SMBD_DISCONNECTED;
+		wake_up_interruptible(&info->disconn_wait);
+		wake_up_interruptible(&info->wait_reassembly_queue);
+		wake_up_interruptible_all(&info->wait_send_queue);
+		break;
+
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+/* Upcall from RDMA QP */
+static void
+smbd_qp_async_error_upcall(struct ib_event *event, void *context)
+{
+	struct smbd_connection *info = context;
+
+	log_rdma_event(ERR, "%s on device %s info %p\n",
+		ib_event_msg(event->event), event->device->name, info);
+
+	switch (event->event) {
+	case IB_EVENT_CQ_ERR:
+	case IB_EVENT_QP_FATAL:
+		smbd_disconnect_rdma_connection(info);
+		break;
+
+	default:
+		break;
+	}
+}
+
+static inline void *smbd_request_payload(struct smbd_request *request)
+{
+	return (void *)request->packet;
+}
+
+static inline void *smbd_response_payload(struct smbd_response *response)
+{
+	return (void *)response->packet;
+}
+
+/* Called when a RDMA send is done */
+static void send_done(struct ib_cq *cq, struct ib_wc *wc)
+{
+	int i;
+	struct smbd_request *request =
+		container_of(wc->wr_cqe, struct smbd_request, cqe);
+
+	log_rdma_send(INFO, "smbd_request 0x%p completed wc->status=%d\n",
+		request, wc->status);
+
+	if (wc->status != IB_WC_SUCCESS || wc->opcode != IB_WC_SEND) {
+		log_rdma_send(ERR, "wc->status=%d wc->opcode=%d\n",
+			wc->status, wc->opcode);
+		smbd_disconnect_rdma_connection(request->info);
+	}
+
+	for (i = 0; i < request->num_sge; i++)
+		ib_dma_unmap_single(request->info->id->device,
+			request->sge[i].addr,
+			request->sge[i].length,
+			DMA_TO_DEVICE);
+
+	if (atomic_dec_and_test(&request->info->send_pending))
+		wake_up(&request->info->wait_send_pending);
+
+	wake_up(&request->info->wait_post_send);
+
+	mempool_free(request, request->info->request_mempool);
+}
+
+static void dump_smbd_negotiate_resp(struct smbd_negotiate_resp *resp)
+{
+	log_rdma_event(INFO, "resp message min_version %u max_version %u negotiated_version %u credits_requested %u credits_granted %u status %u max_readwrite_size %u preferred_send_size %u max_receive_size %u max_fragmented_size %u\n",
+		       resp->min_version, resp->max_version,
+		       resp->negotiated_version, resp->credits_requested,
+		       resp->credits_granted, resp->status,
+		       resp->max_readwrite_size, resp->preferred_send_size,
+		       resp->max_receive_size, resp->max_fragmented_size);
+}
+
+/*
+ * Process a negotiation response message, according to [MS-SMBD]3.1.5.7
+ * response, packet_length: the negotiation response message
+ * return value: true if negotiation is a success, false if failed
+ */
+static bool process_negotiation_response(
+		struct smbd_response *response, int packet_length)
+{
+	struct smbd_connection *info = response->info;
+	struct smbd_negotiate_resp *packet = smbd_response_payload(response);
+
+	if (packet_length < sizeof(struct smbd_negotiate_resp)) {
+		log_rdma_event(ERR,
+			"error: packet_length=%d\n", packet_length);
+		return false;
+	}
+
+	if (le16_to_cpu(packet->negotiated_version) != SMBD_V1) {
+		log_rdma_event(ERR, "error: negotiated_version=%x\n",
+			le16_to_cpu(packet->negotiated_version));
+		return false;
+	}
+	info->protocol = le16_to_cpu(packet->negotiated_version);
+
+	if (packet->credits_requested == 0) {
+		log_rdma_event(ERR, "error: credits_requested==0\n");
+		return false;
+	}
+	info->receive_credit_target = le16_to_cpu(packet->credits_requested);
+
+	if (packet->credits_granted == 0) {
+		log_rdma_event(ERR, "error: credits_granted==0\n");
+		return false;
+	}
+	atomic_set(&info->send_credits, le16_to_cpu(packet->credits_granted));
+
+	atomic_set(&info->receive_credits, 0);
+
+	if (le32_to_cpu(packet->preferred_send_size) > info->max_receive_size) {
+		log_rdma_event(ERR, "error: preferred_send_size=%d\n",
+			le32_to_cpu(packet->preferred_send_size));
+		return false;
+	}
+	info->max_receive_size = le32_to_cpu(packet->preferred_send_size);
+
+	if (le32_to_cpu(packet->max_receive_size) < SMBD_MIN_RECEIVE_SIZE) {
+		log_rdma_event(ERR, "error: max_receive_size=%d\n",
+			le32_to_cpu(packet->max_receive_size));
+		return false;
+	}
+	info->max_send_size = min_t(int, info->max_send_size,
+					le32_to_cpu(packet->max_receive_size));
+
+	if (le32_to_cpu(packet->max_fragmented_size) <
+			SMBD_MIN_FRAGMENTED_SIZE) {
+		log_rdma_event(ERR, "error: max_fragmented_size=%d\n",
+			le32_to_cpu(packet->max_fragmented_size));
+		return false;
+	}
+	info->max_fragmented_send_size =
+		le32_to_cpu(packet->max_fragmented_size);
+	info->rdma_readwrite_threshold =
+		rdma_readwrite_threshold > info->max_fragmented_send_size ?
+		info->max_fragmented_send_size :
+		rdma_readwrite_threshold;
+
+
+	info->max_readwrite_size = min_t(u32,
+			le32_to_cpu(packet->max_readwrite_size),
+			info->max_frmr_depth * PAGE_SIZE);
+	info->max_frmr_depth = info->max_readwrite_size / PAGE_SIZE;
+
+	return true;
+}
+
+static void smbd_post_send_credits(struct work_struct *work)
+{
+	int ret = 0;
+	int use_receive_queue = 1;
+	int rc;
+	struct smbd_response *response;
+	struct smbd_connection *info =
+		container_of(work, struct smbd_connection,
+			post_send_credits_work);
+
+	if (info->transport_status != SMBD_CONNECTED) {
+		wake_up(&info->wait_receive_queues);
+		return;
+	}
+
+	if (info->receive_credit_target >
+		atomic_read(&info->receive_credits)) {
+		while (true) {
+			if (use_receive_queue)
+				response = get_receive_buffer(info);
+			else
+				response = get_empty_queue_buffer(info);
+			if (!response) {
+				/* now switch to emtpy packet queue */
+				if (use_receive_queue) {
+					use_receive_queue = 0;
+					continue;
+				} else
+					break;
+			}
+
+			response->type = SMBD_TRANSFER_DATA;
+			response->first_segment = false;
+			rc = smbd_post_recv(info, response);
+			if (rc) {
+				log_rdma_recv(ERR,
+					"post_recv failed rc=%d\n", rc);
+				put_receive_buffer(info, response);
+				break;
+			}
+
+			ret++;
+		}
+	}
+
+	spin_lock(&info->lock_new_credits_offered);
+	info->new_credits_offered += ret;
+	spin_unlock(&info->lock_new_credits_offered);
+
+	/* Promptly send an immediate packet as defined in [MS-SMBD] 3.1.1.1 */
+	info->send_immediate = true;
+	if (atomic_read(&info->receive_credits) <
+		info->receive_credit_target - 1) {
+		if (info->keep_alive_requested == KEEP_ALIVE_PENDING ||
+		    info->send_immediate) {
+			log_keep_alive(INFO, "send an empty message\n");
+			smbd_post_send_empty(info);
+		}
+	}
+}
+
+/* Called from softirq, when recv is done */
+static void recv_done(struct ib_cq *cq, struct ib_wc *wc)
+{
+	struct smbd_data_transfer *data_transfer;
+	struct smbd_response *response =
+		container_of(wc->wr_cqe, struct smbd_response, cqe);
+	struct smbd_connection *info = response->info;
+	int data_length = 0;
+
+	log_rdma_recv(INFO, "response=0x%p type=%d wc status=%d wc opcode %d byte_len=%d pkey_index=%u\n",
+		      response, response->type, wc->status, wc->opcode,
+		      wc->byte_len, wc->pkey_index);
+
+	if (wc->status != IB_WC_SUCCESS || wc->opcode != IB_WC_RECV) {
+		log_rdma_recv(INFO, "wc->status=%d opcode=%d\n",
+			wc->status, wc->opcode);
+		smbd_disconnect_rdma_connection(info);
+		goto error;
+	}
+
+	ib_dma_sync_single_for_cpu(
+		wc->qp->device,
+		response->sge.addr,
+		response->sge.length,
+		DMA_FROM_DEVICE);
+
+	switch (response->type) {
+	/* SMBD negotiation response */
+	case SMBD_NEGOTIATE_RESP:
+		dump_smbd_negotiate_resp(smbd_response_payload(response));
+		info->full_packet_received = true;
+		info->negotiate_done =
+			process_negotiation_response(response, wc->byte_len);
+		complete(&info->negotiate_completion);
+		break;
+
+	/* SMBD data transfer packet */
+	case SMBD_TRANSFER_DATA:
+		data_transfer = smbd_response_payload(response);
+		data_length = le32_to_cpu(data_transfer->data_length);
+
+		/*
+		 * If this is a packet with data playload place the data in
+		 * reassembly queue and wake up the reading thread
+		 */
+		if (data_length) {
+			if (info->full_packet_received)
+				response->first_segment = true;
+
+			if (le32_to_cpu(data_transfer->remaining_data_length))
+				info->full_packet_received = false;
+			else
+				info->full_packet_received = true;
+
+			enqueue_reassembly(
+				info,
+				response,
+				data_length);
+		} else
+			put_empty_packet(info, response);
+
+		if (data_length)
+			wake_up_interruptible(&info->wait_reassembly_queue);
+
+		atomic_dec(&info->receive_credits);
+		info->receive_credit_target =
+			le16_to_cpu(data_transfer->credits_requested);
+		if (le16_to_cpu(data_transfer->credits_granted)) {
+			atomic_add(le16_to_cpu(data_transfer->credits_granted),
+				&info->send_credits);
+			/*
+			 * We have new send credits granted from remote peer
+			 * If any sender is waiting for credits, unblock it
+			 */
+			wake_up_interruptible(&info->wait_send_queue);
+		}
+
+		log_incoming(INFO, "data flags %d data_offset %d data_length %d remaining_data_length %d\n",
+			     le16_to_cpu(data_transfer->flags),
+			     le32_to_cpu(data_transfer->data_offset),
+			     le32_to_cpu(data_transfer->data_length),
+			     le32_to_cpu(data_transfer->remaining_data_length));
+
+		/* Send a KEEP_ALIVE response right away if requested */
+		info->keep_alive_requested = KEEP_ALIVE_NONE;
+		if (le16_to_cpu(data_transfer->flags) &
+				SMB_DIRECT_RESPONSE_REQUESTED) {
+			info->keep_alive_requested = KEEP_ALIVE_PENDING;
+		}
+
+		return;
+
+	default:
+		log_rdma_recv(ERR,
+			"unexpected response type=%d\n", response->type);
+	}
+
+error:
+	put_receive_buffer(info, response);
+}
+
+static struct rdma_cm_id *smbd_create_id(
+		struct smbd_connection *info,
+		struct sockaddr *dstaddr, int port)
+{
+	struct rdma_cm_id *id;
+	int rc;
+	__be16 *sport;
+
+	id = rdma_create_id(&init_net, smbd_conn_upcall, info,
+		RDMA_PS_TCP, IB_QPT_RC);
+	if (IS_ERR(id)) {
+		rc = PTR_ERR(id);
+		log_rdma_event(ERR, "rdma_create_id() failed %i\n", rc);
+		return id;
+	}
+
+	if (dstaddr->sa_family == AF_INET6)
+		sport = &((struct sockaddr_in6 *)dstaddr)->sin6_port;
+	else
+		sport = &((struct sockaddr_in *)dstaddr)->sin_port;
+
+	*sport = htons(port);
+
+	init_completion(&info->ri_done);
+	info->ri_rc = -ETIMEDOUT;
+
+	rc = rdma_resolve_addr(id, NULL, (struct sockaddr *)dstaddr,
+		RDMA_RESOLVE_TIMEOUT);
+	if (rc) {
+		log_rdma_event(ERR, "rdma_resolve_addr() failed %i\n", rc);
+		goto out;
+	}
+	rc = wait_for_completion_interruptible_timeout(
+		&info->ri_done, msecs_to_jiffies(RDMA_RESOLVE_TIMEOUT));
+	/* e.g. if interrupted returns -ERESTARTSYS */
+	if (rc < 0) {
+		log_rdma_event(ERR, "rdma_resolve_addr timeout rc: %i\n", rc);
+		goto out;
+	}
+	rc = info->ri_rc;
+	if (rc) {
+		log_rdma_event(ERR, "rdma_resolve_addr() completed %i\n", rc);
+		goto out;
+	}
+
+	info->ri_rc = -ETIMEDOUT;
+	rc = rdma_resolve_route(id, RDMA_RESOLVE_TIMEOUT);
+	if (rc) {
+		log_rdma_event(ERR, "rdma_resolve_route() failed %i\n", rc);
+		goto out;
+	}
+	rc = wait_for_completion_interruptible_timeout(
+		&info->ri_done, msecs_to_jiffies(RDMA_RESOLVE_TIMEOUT));
+	/* e.g. if interrupted returns -ERESTARTSYS */
+	if (rc < 0)  {
+		log_rdma_event(ERR, "rdma_resolve_addr timeout rc: %i\n", rc);
+		goto out;
+	}
+	rc = info->ri_rc;
+	if (rc) {
+		log_rdma_event(ERR, "rdma_resolve_route() completed %i\n", rc);
+		goto out;
+	}
+
+	return id;
+
+out:
+	rdma_destroy_id(id);
+	return ERR_PTR(rc);
+}
+
+/*
+ * Test if FRWR (Fast Registration Work Requests) is supported on the device
+ * This implementation requries FRWR on RDMA read/write
+ * return value: true if it is supported
+ */
+static bool frwr_is_supported(struct ib_device_attr *attrs)
+{
+	if (!(attrs->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS))
+		return false;
+	if (attrs->max_fast_reg_page_list_len == 0)
+		return false;
+	return true;
+}
+
+static int smbd_ia_open(
+		struct smbd_connection *info,
+		struct sockaddr *dstaddr, int port)
+{
+	int rc;
+
+	info->id = smbd_create_id(info, dstaddr, port);
+	if (IS_ERR(info->id)) {
+		rc = PTR_ERR(info->id);
+		goto out1;
+	}
+
+	if (!frwr_is_supported(&info->id->device->attrs)) {
+		log_rdma_event(ERR, "Fast Registration Work Requests (FRWR) is not supported\n");
+		log_rdma_event(ERR, "Device capability flags = %llx max_fast_reg_page_list_len = %u\n",
+			       info->id->device->attrs.device_cap_flags,
+			       info->id->device->attrs.max_fast_reg_page_list_len);
+		rc = -EPROTONOSUPPORT;
+		goto out2;
+	}
+	info->max_frmr_depth = min_t(int,
+		smbd_max_frmr_depth,
+		info->id->device->attrs.max_fast_reg_page_list_len);
+	info->mr_type = IB_MR_TYPE_MEM_REG;
+	if (info->id->device->attrs.kernel_cap_flags & IBK_SG_GAPS_REG)
+		info->mr_type = IB_MR_TYPE_SG_GAPS;
+
+	info->pd = ib_alloc_pd(info->id->device, 0);
+	if (IS_ERR(info->pd)) {
+		rc = PTR_ERR(info->pd);
+		log_rdma_event(ERR, "ib_alloc_pd() returned %d\n", rc);
+		goto out2;
+	}
+
+	return 0;
+
+out2:
+	rdma_destroy_id(info->id);
+	info->id = NULL;
+
+out1:
+	return rc;
+}
+
+/*
+ * Send a negotiation request message to the peer
+ * The negotiation procedure is in [MS-SMBD] 3.1.5.2 and 3.1.5.3
+ * After negotiation, the transport is connected and ready for
+ * carrying upper layer SMB payload
+ */
+static int smbd_post_send_negotiate_req(struct smbd_connection *info)
+{
+	struct ib_send_wr send_wr;
+	int rc = -ENOMEM;
+	struct smbd_request *request;
+	struct smbd_negotiate_req *packet;
+
+	request = mempool_alloc(info->request_mempool, GFP_KERNEL);
+	if (!request)
+		return rc;
+
+	request->info = info;
+
+	packet = smbd_request_payload(request);
+	packet->min_version = cpu_to_le16(SMBD_V1);
+	packet->max_version = cpu_to_le16(SMBD_V1);
+	packet->reserved = 0;
+	packet->credits_requested = cpu_to_le16(info->send_credit_target);
+	packet->preferred_send_size = cpu_to_le32(info->max_send_size);
+	packet->max_receive_size = cpu_to_le32(info->max_receive_size);
+	packet->max_fragmented_size =
+		cpu_to_le32(info->max_fragmented_recv_size);
+
+	request->num_sge = 1;
+	request->sge[0].addr = ib_dma_map_single(
+				info->id->device, (void *)packet,
+				sizeof(*packet), DMA_TO_DEVICE);
+	if (ib_dma_mapping_error(info->id->device, request->sge[0].addr)) {
+		rc = -EIO;
+		goto dma_mapping_failed;
+	}
+
+	request->sge[0].length = sizeof(*packet);
+	request->sge[0].lkey = info->pd->local_dma_lkey;
+
+	ib_dma_sync_single_for_device(
+		info->id->device, request->sge[0].addr,
+		request->sge[0].length, DMA_TO_DEVICE);
+
+	request->cqe.done = send_done;
+
+	send_wr.next = NULL;
+	send_wr.wr_cqe = &request->cqe;
+	send_wr.sg_list = request->sge;
+	send_wr.num_sge = request->num_sge;
+	send_wr.opcode = IB_WR_SEND;
+	send_wr.send_flags = IB_SEND_SIGNALED;
+
+	log_rdma_send(INFO, "sge addr=0x%llx length=%u lkey=0x%x\n",
+		request->sge[0].addr,
+		request->sge[0].length, request->sge[0].lkey);
+
+	atomic_inc(&info->send_pending);
+	rc = ib_post_send(info->id->qp, &send_wr, NULL);
+	if (!rc)
+		return 0;
+
+	/* if we reach here, post send failed */
+	log_rdma_send(ERR, "ib_post_send failed rc=%d\n", rc);
+	atomic_dec(&info->send_pending);
+	ib_dma_unmap_single(info->id->device, request->sge[0].addr,
+		request->sge[0].length, DMA_TO_DEVICE);
+
+	smbd_disconnect_rdma_connection(info);
+
+dma_mapping_failed:
+	mempool_free(request, info->request_mempool);
+	return rc;
+}
+
+/*
+ * Extend the credits to remote peer
+ * This implements [MS-SMBD] 3.1.5.9
+ * The idea is that we should extend credits to remote peer as quickly as
+ * it's allowed, to maintain data flow. We allocate as much receive
+ * buffer as possible, and extend the receive credits to remote peer
+ * return value: the new credtis being granted.
+ */
+static int manage_credits_prior_sending(struct smbd_connection *info)
+{
+	int new_credits;
+
+	spin_lock(&info->lock_new_credits_offered);
+	new_credits = info->new_credits_offered;
+	info->new_credits_offered = 0;
+	spin_unlock(&info->lock_new_credits_offered);
+
+	return new_credits;
+}
+
+/*
+ * Check if we need to send a KEEP_ALIVE message
+ * The idle connection timer triggers a KEEP_ALIVE message when expires
+ * SMB_DIRECT_RESPONSE_REQUESTED is set in the message flag to have peer send
+ * back a response.
+ * return value:
+ * 1 if SMB_DIRECT_RESPONSE_REQUESTED needs to be set
+ * 0: otherwise
+ */
+static int manage_keep_alive_before_sending(struct smbd_connection *info)
+{
+	if (info->keep_alive_requested == KEEP_ALIVE_PENDING) {
+		info->keep_alive_requested = KEEP_ALIVE_SENT;
+		return 1;
+	}
+	return 0;
+}
+
+/* Post the send request */
+static int smbd_post_send(struct smbd_connection *info,
+		struct smbd_request *request)
+{
+	struct ib_send_wr send_wr;
+	int rc, i;
+
+	for (i = 0; i < request->num_sge; i++) {
+		log_rdma_send(INFO,
+			"rdma_request sge[%d] addr=0x%llx length=%u\n",
+			i, request->sge[i].addr, request->sge[i].length);
+		ib_dma_sync_single_for_device(
+			info->id->device,
+			request->sge[i].addr,
+			request->sge[i].length,
+			DMA_TO_DEVICE);
+	}
+
+	request->cqe.done = send_done;
+
+	send_wr.next = NULL;
+	send_wr.wr_cqe = &request->cqe;
+	send_wr.sg_list = request->sge;
+	send_wr.num_sge = request->num_sge;
+	send_wr.opcode = IB_WR_SEND;
+	send_wr.send_flags = IB_SEND_SIGNALED;
+
+	rc = ib_post_send(info->id->qp, &send_wr, NULL);
+	if (rc) {
+		log_rdma_send(ERR, "ib_post_send failed rc=%d\n", rc);
+		smbd_disconnect_rdma_connection(info);
+		rc = -EAGAIN;
+	} else
+		/* Reset timer for idle connection after packet is sent */
+		mod_delayed_work(info->workqueue, &info->idle_timer_work,
+			info->keep_alive_interval*HZ);
+
+	return rc;
+}
+
+static int smbd_post_send_iter(struct smbd_connection *info,
+			       struct iov_iter *iter,
+			       int *_remaining_data_length)
+{
+	int i, rc;
+	int header_length;
+	int data_length;
+	struct smbd_request *request;
+	struct smbd_data_transfer *packet;
+	int new_credits = 0;
+
+wait_credit:
+	/* Wait for send credits. A SMBD packet needs one credit */
+	rc = wait_event_interruptible(info->wait_send_queue,
+		atomic_read(&info->send_credits) > 0 ||
+		info->transport_status != SMBD_CONNECTED);
+	if (rc)
+		goto err_wait_credit;
+
+	if (info->transport_status != SMBD_CONNECTED) {
+		log_outgoing(ERR, "disconnected not sending on wait_credit\n");
+		rc = -EAGAIN;
+		goto err_wait_credit;
+	}
+	if (unlikely(atomic_dec_return(&info->send_credits) < 0)) {
+		atomic_inc(&info->send_credits);
+		goto wait_credit;
+	}
+
+wait_send_queue:
+	wait_event(info->wait_post_send,
+		atomic_read(&info->send_pending) < info->send_credit_target ||
+		info->transport_status != SMBD_CONNECTED);
+
+	if (info->transport_status != SMBD_CONNECTED) {
+		log_outgoing(ERR, "disconnected not sending on wait_send_queue\n");
+		rc = -EAGAIN;
+		goto err_wait_send_queue;
+	}
+
+	if (unlikely(atomic_inc_return(&info->send_pending) >
+				info->send_credit_target)) {
+		atomic_dec(&info->send_pending);
+		goto wait_send_queue;
+	}
+
+	request = mempool_alloc(info->request_mempool, GFP_KERNEL);
+	if (!request) {
+		rc = -ENOMEM;
+		goto err_alloc;
+	}
+
+	request->info = info;
+	memset(request->sge, 0, sizeof(request->sge));
+
+	/* Fill in the data payload to find out how much data we can add */
+	if (iter) {
+		struct smb_extract_to_rdma extract = {
+			.nr_sge		= 1,
+			.max_sge	= SMBDIRECT_MAX_SEND_SGE,
+			.sge		= request->sge,
+			.device		= info->id->device,
+			.local_dma_lkey	= info->pd->local_dma_lkey,
+			.direction	= DMA_TO_DEVICE,
+		};
+
+		rc = smb_extract_iter_to_rdma(iter, *_remaining_data_length,
+					      &extract);
+		if (rc < 0)
+			goto err_dma;
+		data_length = rc;
+		request->num_sge = extract.nr_sge;
+		*_remaining_data_length -= data_length;
+	} else {
+		data_length = 0;
+		request->num_sge = 1;
+	}
+
+	/* Fill in the packet header */
+	packet = smbd_request_payload(request);
+	packet->credits_requested = cpu_to_le16(info->send_credit_target);
+
+	new_credits = manage_credits_prior_sending(info);
+	atomic_add(new_credits, &info->receive_credits);
+	packet->credits_granted = cpu_to_le16(new_credits);
+
+	info->send_immediate = false;
+
+	packet->flags = 0;
+	if (manage_keep_alive_before_sending(info))
+		packet->flags |= cpu_to_le16(SMB_DIRECT_RESPONSE_REQUESTED);
+
+	packet->reserved = 0;
+	if (!data_length)
+		packet->data_offset = 0;
+	else
+		packet->data_offset = cpu_to_le32(24);
+	packet->data_length = cpu_to_le32(data_length);
+	packet->remaining_data_length = cpu_to_le32(*_remaining_data_length);
+	packet->padding = 0;
+
+	log_outgoing(INFO, "credits_requested=%d credits_granted=%d data_offset=%d data_length=%d remaining_data_length=%d\n",
+		     le16_to_cpu(packet->credits_requested),
+		     le16_to_cpu(packet->credits_granted),
+		     le32_to_cpu(packet->data_offset),
+		     le32_to_cpu(packet->data_length),
+		     le32_to_cpu(packet->remaining_data_length));
+
+	/* Map the packet to DMA */
+	header_length = sizeof(struct smbd_data_transfer);
+	/* If this is a packet without payload, don't send padding */
+	if (!data_length)
+		header_length = offsetof(struct smbd_data_transfer, padding);
+
+	request->sge[0].addr = ib_dma_map_single(info->id->device,
+						 (void *)packet,
+						 header_length,
+						 DMA_TO_DEVICE);
+	if (ib_dma_mapping_error(info->id->device, request->sge[0].addr)) {
+		rc = -EIO;
+		request->sge[0].addr = 0;
+		goto err_dma;
+	}
+
+	request->sge[0].length = header_length;
+	request->sge[0].lkey = info->pd->local_dma_lkey;
+
+	rc = smbd_post_send(info, request);
+	if (!rc)
+		return 0;
+
+err_dma:
+	for (i = 0; i < request->num_sge; i++)
+		if (request->sge[i].addr)
+			ib_dma_unmap_single(info->id->device,
+					    request->sge[i].addr,
+					    request->sge[i].length,
+					    DMA_TO_DEVICE);
+	mempool_free(request, info->request_mempool);
+
+	/* roll back receive credits and credits to be offered */
+	spin_lock(&info->lock_new_credits_offered);
+	info->new_credits_offered += new_credits;
+	spin_unlock(&info->lock_new_credits_offered);
+	atomic_sub(new_credits, &info->receive_credits);
+
+err_alloc:
+	if (atomic_dec_and_test(&info->send_pending))
+		wake_up(&info->wait_send_pending);
+
+err_wait_send_queue:
+	/* roll back send credits and pending */
+	atomic_inc(&info->send_credits);
+
+err_wait_credit:
+	return rc;
+}
+
+/*
+ * Send an empty message
+ * Empty message is used to extend credits to peer to for keep live
+ * while there is no upper layer payload to send at the time
+ */
+static int smbd_post_send_empty(struct smbd_connection *info)
+{
+	int remaining_data_length = 0;
+
+	info->count_send_empty++;
+	return smbd_post_send_iter(info, NULL, &remaining_data_length);
+}
+
+/*
+ * Post a receive request to the transport
+ * The remote peer can only send data when a receive request is posted
+ * The interaction is controlled by send/receive credit system
+ */
+static int smbd_post_recv(
+		struct smbd_connection *info, struct smbd_response *response)
+{
+	struct ib_recv_wr recv_wr;
+	int rc = -EIO;
+
+	response->sge.addr = ib_dma_map_single(
+				info->id->device, response->packet,
+				info->max_receive_size, DMA_FROM_DEVICE);
+	if (ib_dma_mapping_error(info->id->device, response->sge.addr))
+		return rc;
+
+	response->sge.length = info->max_receive_size;
+	response->sge.lkey = info->pd->local_dma_lkey;
+
+	response->cqe.done = recv_done;
+
+	recv_wr.wr_cqe = &response->cqe;
+	recv_wr.next = NULL;
+	recv_wr.sg_list = &response->sge;
+	recv_wr.num_sge = 1;
+
+	rc = ib_post_recv(info->id->qp, &recv_wr, NULL);
+	if (rc) {
+		ib_dma_unmap_single(info->id->device, response->sge.addr,
+				    response->sge.length, DMA_FROM_DEVICE);
+		smbd_disconnect_rdma_connection(info);
+		log_rdma_recv(ERR, "ib_post_recv failed rc=%d\n", rc);
+	}
+
+	return rc;
+}
+
+/* Perform SMBD negotiate according to [MS-SMBD] 3.1.5.2 */
+static int smbd_negotiate(struct smbd_connection *info)
+{
+	int rc;
+	struct smbd_response *response = get_receive_buffer(info);
+
+	response->type = SMBD_NEGOTIATE_RESP;
+	rc = smbd_post_recv(info, response);
+	log_rdma_event(INFO, "smbd_post_recv rc=%d iov.addr=0x%llx iov.length=%u iov.lkey=0x%x\n",
+		       rc, response->sge.addr,
+		       response->sge.length, response->sge.lkey);
+	if (rc)
+		return rc;
+
+	init_completion(&info->negotiate_completion);
+	info->negotiate_done = false;
+	rc = smbd_post_send_negotiate_req(info);
+	if (rc)
+		return rc;
+
+	rc = wait_for_completion_interruptible_timeout(
+		&info->negotiate_completion, SMBD_NEGOTIATE_TIMEOUT * HZ);
+	log_rdma_event(INFO, "wait_for_completion_timeout rc=%d\n", rc);
+
+	if (info->negotiate_done)
+		return 0;
+
+	if (rc == 0)
+		rc = -ETIMEDOUT;
+	else if (rc == -ERESTARTSYS)
+		rc = -EINTR;
+	else
+		rc = -ENOTCONN;
+
+	return rc;
+}
+
+static void put_empty_packet(
+		struct smbd_connection *info, struct smbd_response *response)
+{
+	spin_lock(&info->empty_packet_queue_lock);
+	list_add_tail(&response->list, &info->empty_packet_queue);
+	info->count_empty_packet_queue++;
+	spin_unlock(&info->empty_packet_queue_lock);
+
+	queue_work(info->workqueue, &info->post_send_credits_work);
+}
+
+/*
+ * Implement Connection.FragmentReassemblyBuffer defined in [MS-SMBD] 3.1.1.1
+ * This is a queue for reassembling upper layer payload and present to upper
+ * layer. All the inncoming payload go to the reassembly queue, regardless of
+ * if reassembly is required. The uuper layer code reads from the queue for all
+ * incoming payloads.
+ * Put a received packet to the reassembly queue
+ * response: the packet received
+ * data_length: the size of payload in this packet
+ */
+static void enqueue_reassembly(
+	struct smbd_connection *info,
+	struct smbd_response *response,
+	int data_length)
+{
+	spin_lock(&info->reassembly_queue_lock);
+	list_add_tail(&response->list, &info->reassembly_queue);
+	info->reassembly_queue_length++;
+	/*
+	 * Make sure reassembly_data_length is updated after list and
+	 * reassembly_queue_length are updated. On the dequeue side
+	 * reassembly_data_length is checked without a lock to determine
+	 * if reassembly_queue_length and list is up to date
+	 */
+	virt_wmb();
+	info->reassembly_data_length += data_length;
+	spin_unlock(&info->reassembly_queue_lock);
+	info->count_reassembly_queue++;
+	info->count_enqueue_reassembly_queue++;
+}
+
+/*
+ * Get the first entry at the front of reassembly queue
+ * Caller is responsible for locking
+ * return value: the first entry if any, NULL if queue is empty
+ */
+static struct smbd_response *_get_first_reassembly(struct smbd_connection *info)
+{
+	struct smbd_response *ret = NULL;
+
+	if (!list_empty(&info->reassembly_queue)) {
+		ret = list_first_entry(
+			&info->reassembly_queue,
+			struct smbd_response, list);
+	}
+	return ret;
+}
+
+static struct smbd_response *get_empty_queue_buffer(
+		struct smbd_connection *info)
+{
+	struct smbd_response *ret = NULL;
+	unsigned long flags;
+
+	spin_lock_irqsave(&info->empty_packet_queue_lock, flags);
+	if (!list_empty(&info->empty_packet_queue)) {
+		ret = list_first_entry(
+			&info->empty_packet_queue,
+			struct smbd_response, list);
+		list_del(&ret->list);
+		info->count_empty_packet_queue--;
+	}
+	spin_unlock_irqrestore(&info->empty_packet_queue_lock, flags);
+
+	return ret;
+}
+
+/*
+ * Get a receive buffer
+ * For each remote send, we need to post a receive. The receive buffers are
+ * pre-allocated in advance.
+ * return value: the receive buffer, NULL if none is available
+ */
+static struct smbd_response *get_receive_buffer(struct smbd_connection *info)
+{
+	struct smbd_response *ret = NULL;
+	unsigned long flags;
+
+	spin_lock_irqsave(&info->receive_queue_lock, flags);
+	if (!list_empty(&info->receive_queue)) {
+		ret = list_first_entry(
+			&info->receive_queue,
+			struct smbd_response, list);
+		list_del(&ret->list);
+		info->count_receive_queue--;
+		info->count_get_receive_buffer++;
+	}
+	spin_unlock_irqrestore(&info->receive_queue_lock, flags);
+
+	return ret;
+}
+
+/*
+ * Return a receive buffer
+ * Upon returning of a receive buffer, we can post new receive and extend
+ * more receive credits to remote peer. This is done immediately after a
+ * receive buffer is returned.
+ */
+static void put_receive_buffer(
+	struct smbd_connection *info, struct smbd_response *response)
+{
+	unsigned long flags;
+
+	ib_dma_unmap_single(info->id->device, response->sge.addr,
+		response->sge.length, DMA_FROM_DEVICE);
+
+	spin_lock_irqsave(&info->receive_queue_lock, flags);
+	list_add_tail(&response->list, &info->receive_queue);
+	info->count_receive_queue++;
+	info->count_put_receive_buffer++;
+	spin_unlock_irqrestore(&info->receive_queue_lock, flags);
+
+	queue_work(info->workqueue, &info->post_send_credits_work);
+}
+
+/* Preallocate all receive buffer on transport establishment */
+static int allocate_receive_buffers(struct smbd_connection *info, int num_buf)
+{
+	int i;
+	struct smbd_response *response;
+
+	INIT_LIST_HEAD(&info->reassembly_queue);
+	spin_lock_init(&info->reassembly_queue_lock);
+	info->reassembly_data_length = 0;
+	info->reassembly_queue_length = 0;
+
+	INIT_LIST_HEAD(&info->receive_queue);
+	spin_lock_init(&info->receive_queue_lock);
+	info->count_receive_queue = 0;
+
+	INIT_LIST_HEAD(&info->empty_packet_queue);
+	spin_lock_init(&info->empty_packet_queue_lock);
+	info->count_empty_packet_queue = 0;
+
+	init_waitqueue_head(&info->wait_receive_queues);
+
+	for (i = 0; i < num_buf; i++) {
+		response = mempool_alloc(info->response_mempool, GFP_KERNEL);
+		if (!response)
+			goto allocate_failed;
+
+		response->info = info;
+		list_add_tail(&response->list, &info->receive_queue);
+		info->count_receive_queue++;
+	}
+
+	return 0;
+
+allocate_failed:
+	while (!list_empty(&info->receive_queue)) {
+		response = list_first_entry(
+				&info->receive_queue,
+				struct smbd_response, list);
+		list_del(&response->list);
+		info->count_receive_queue--;
+
+		mempool_free(response, info->response_mempool);
+	}
+	return -ENOMEM;
+}
+
+static void destroy_receive_buffers(struct smbd_connection *info)
+{
+	struct smbd_response *response;
+
+	while ((response = get_receive_buffer(info)))
+		mempool_free(response, info->response_mempool);
+
+	while ((response = get_empty_queue_buffer(info)))
+		mempool_free(response, info->response_mempool);
+}
+
+/* Implement idle connection timer [MS-SMBD] 3.1.6.2 */
+static void idle_connection_timer(struct work_struct *work)
+{
+	struct smbd_connection *info = container_of(
+					work, struct smbd_connection,
+					idle_timer_work.work);
+
+	if (info->keep_alive_requested != KEEP_ALIVE_NONE) {
+		log_keep_alive(ERR,
+			"error status info->keep_alive_requested=%d\n",
+			info->keep_alive_requested);
+		smbd_disconnect_rdma_connection(info);
+		return;
+	}
+
+	log_keep_alive(INFO, "about to send an empty idle message\n");
+	smbd_post_send_empty(info);
+
+	/* Setup the next idle timeout work */
+	queue_delayed_work(info->workqueue, &info->idle_timer_work,
+			info->keep_alive_interval*HZ);
+}
+
+/*
+ * Destroy the transport and related RDMA and memory resources
+ * Need to go through all the pending counters and make sure on one is using
+ * the transport while it is destroyed
+ */
+void smbd_destroy(struct TCP_Server_Info *server)
+{
+	struct smbd_connection *info = server->smbd_conn;
+	struct smbd_response *response;
+	unsigned long flags;
+
+	if (!info) {
+		log_rdma_event(INFO, "rdma session already destroyed\n");
+		return;
+	}
+
+	log_rdma_event(INFO, "destroying rdma session\n");
+	if (info->transport_status != SMBD_DISCONNECTED) {
+		rdma_disconnect(server->smbd_conn->id);
+		log_rdma_event(INFO, "wait for transport being disconnected\n");
+		wait_event_interruptible(
+			info->disconn_wait,
+			info->transport_status == SMBD_DISCONNECTED);
+	}
+
+	log_rdma_event(INFO, "destroying qp\n");
+	ib_drain_qp(info->id->qp);
+	rdma_destroy_qp(info->id);
+
+	log_rdma_event(INFO, "cancelling idle timer\n");
+	cancel_delayed_work_sync(&info->idle_timer_work);
+
+	log_rdma_event(INFO, "wait for all send posted to IB to finish\n");
+	wait_event(info->wait_send_pending,
+		atomic_read(&info->send_pending) == 0);
+
+	/* It's not possible for upper layer to get to reassembly */
+	log_rdma_event(INFO, "drain the reassembly queue\n");
+	do {
+		spin_lock_irqsave(&info->reassembly_queue_lock, flags);
+		response = _get_first_reassembly(info);
+		if (response) {
+			list_del(&response->list);
+			spin_unlock_irqrestore(
+				&info->reassembly_queue_lock, flags);
+			put_receive_buffer(info, response);
+		} else
+			spin_unlock_irqrestore(
+				&info->reassembly_queue_lock, flags);
+	} while (response);
+	info->reassembly_data_length = 0;
+
+	log_rdma_event(INFO, "free receive buffers\n");
+	wait_event(info->wait_receive_queues,
+		info->count_receive_queue + info->count_empty_packet_queue
+			== info->receive_credit_max);
+	destroy_receive_buffers(info);
+
+	/*
+	 * For performance reasons, memory registration and deregistration
+	 * are not locked by srv_mutex. It is possible some processes are
+	 * blocked on transport srv_mutex while holding memory registration.
+	 * Release the transport srv_mutex to allow them to hit the failure
+	 * path when sending data, and then release memory registartions.
+	 */
+	log_rdma_event(INFO, "freeing mr list\n");
+	wake_up_interruptible_all(&info->wait_mr);
+	while (atomic_read(&info->mr_used_count)) {
+		cifs_server_unlock(server);
+		msleep(1000);
+		cifs_server_lock(server);
+	}
+	destroy_mr_list(info);
+
+	ib_free_cq(info->send_cq);
+	ib_free_cq(info->recv_cq);
+	ib_dealloc_pd(info->pd);
+	rdma_destroy_id(info->id);
+
+	/* free mempools */
+	mempool_destroy(info->request_mempool);
+	kmem_cache_destroy(info->request_cache);
+
+	mempool_destroy(info->response_mempool);
+	kmem_cache_destroy(info->response_cache);
+
+	info->transport_status = SMBD_DESTROYED;
+
+	destroy_workqueue(info->workqueue);
+	log_rdma_event(INFO,  "rdma session destroyed\n");
+	kfree(info);
+	server->smbd_conn = NULL;
+}
+
+/*
+ * Reconnect this SMBD connection, called from upper layer
+ * return value: 0 on success, or actual error code
+ */
+int smbd_reconnect(struct TCP_Server_Info *server)
+{
+	log_rdma_event(INFO, "reconnecting rdma session\n");
+
+	if (!server->smbd_conn) {
+		log_rdma_event(INFO, "rdma session already destroyed\n");
+		goto create_conn;
+	}
+
+	/*
+	 * This is possible if transport is disconnected and we haven't received
+	 * notification from RDMA, but upper layer has detected timeout
+	 */
+	if (server->smbd_conn->transport_status == SMBD_CONNECTED) {
+		log_rdma_event(INFO, "disconnecting transport\n");
+		smbd_destroy(server);
+	}
+
+create_conn:
+	log_rdma_event(INFO, "creating rdma session\n");
+	server->smbd_conn = smbd_get_connection(
+		server, (struct sockaddr *) &server->dstaddr);
+
+	if (server->smbd_conn) {
+		cifs_dbg(VFS, "RDMA transport re-established\n");
+		trace_smb3_smbd_connect_done(server->hostname, server->conn_id, &server->dstaddr);
+		return 0;
+	}
+	trace_smb3_smbd_connect_err(server->hostname, server->conn_id, &server->dstaddr);
+	return -ENOENT;
+}
+
+static void destroy_caches_and_workqueue(struct smbd_connection *info)
+{
+	destroy_receive_buffers(info);
+	destroy_workqueue(info->workqueue);
+	mempool_destroy(info->response_mempool);
+	kmem_cache_destroy(info->response_cache);
+	mempool_destroy(info->request_mempool);
+	kmem_cache_destroy(info->request_cache);
+}
+
+#define MAX_NAME_LEN	80
+static int allocate_caches_and_workqueue(struct smbd_connection *info)
+{
+	char name[MAX_NAME_LEN];
+	int rc;
+
+	scnprintf(name, MAX_NAME_LEN, "smbd_request_%p", info);
+	info->request_cache =
+		kmem_cache_create(
+			name,
+			sizeof(struct smbd_request) +
+				sizeof(struct smbd_data_transfer),
+			0, SLAB_HWCACHE_ALIGN, NULL);
+	if (!info->request_cache)
+		return -ENOMEM;
+
+	info->request_mempool =
+		mempool_create(info->send_credit_target, mempool_alloc_slab,
+			mempool_free_slab, info->request_cache);
+	if (!info->request_mempool)
+		goto out1;
+
+	scnprintf(name, MAX_NAME_LEN, "smbd_response_%p", info);
+	info->response_cache =
+		kmem_cache_create(
+			name,
+			sizeof(struct smbd_response) +
+				info->max_receive_size,
+			0, SLAB_HWCACHE_ALIGN, NULL);
+	if (!info->response_cache)
+		goto out2;
+
+	info->response_mempool =
+		mempool_create(info->receive_credit_max, mempool_alloc_slab,
+		       mempool_free_slab, info->response_cache);
+	if (!info->response_mempool)
+		goto out3;
+
+	scnprintf(name, MAX_NAME_LEN, "smbd_%p", info);
+	info->workqueue = create_workqueue(name);
+	if (!info->workqueue)
+		goto out4;
+
+	rc = allocate_receive_buffers(info, info->receive_credit_max);
+	if (rc) {
+		log_rdma_event(ERR, "failed to allocate receive buffers\n");
+		goto out5;
+	}
+
+	return 0;
+
+out5:
+	destroy_workqueue(info->workqueue);
+out4:
+	mempool_destroy(info->response_mempool);
+out3:
+	kmem_cache_destroy(info->response_cache);
+out2:
+	mempool_destroy(info->request_mempool);
+out1:
+	kmem_cache_destroy(info->request_cache);
+	return -ENOMEM;
+}
+
+/* Create a SMBD connection, called by upper layer */
+static struct smbd_connection *_smbd_get_connection(
+	struct TCP_Server_Info *server, struct sockaddr *dstaddr, int port)
+{
+	int rc;
+	struct smbd_connection *info;
+	struct rdma_conn_param conn_param;
+	struct ib_qp_init_attr qp_attr;
+	struct sockaddr_in *addr_in = (struct sockaddr_in *) dstaddr;
+	struct ib_port_immutable port_immutable;
+	u32 ird_ord_hdr[2];
+
+	info = kzalloc(sizeof(struct smbd_connection), GFP_KERNEL);
+	if (!info)
+		return NULL;
+
+	info->transport_status = SMBD_CONNECTING;
+	rc = smbd_ia_open(info, dstaddr, port);
+	if (rc) {
+		log_rdma_event(INFO, "smbd_ia_open rc=%d\n", rc);
+		goto create_id_failed;
+	}
+
+	if (smbd_send_credit_target > info->id->device->attrs.max_cqe ||
+	    smbd_send_credit_target > info->id->device->attrs.max_qp_wr) {
+		log_rdma_event(ERR, "consider lowering send_credit_target = %d. Possible CQE overrun, device reporting max_cqe %d max_qp_wr %d\n",
+			       smbd_send_credit_target,
+			       info->id->device->attrs.max_cqe,
+			       info->id->device->attrs.max_qp_wr);
+		goto config_failed;
+	}
+
+	if (smbd_receive_credit_max > info->id->device->attrs.max_cqe ||
+	    smbd_receive_credit_max > info->id->device->attrs.max_qp_wr) {
+		log_rdma_event(ERR, "consider lowering receive_credit_max = %d. Possible CQE overrun, device reporting max_cqe %d max_qp_wr %d\n",
+			       smbd_receive_credit_max,
+			       info->id->device->attrs.max_cqe,
+			       info->id->device->attrs.max_qp_wr);
+		goto config_failed;
+	}
+
+	info->receive_credit_max = smbd_receive_credit_max;
+	info->send_credit_target = smbd_send_credit_target;
+	info->max_send_size = smbd_max_send_size;
+	info->max_fragmented_recv_size = smbd_max_fragmented_recv_size;
+	info->max_receive_size = smbd_max_receive_size;
+	info->keep_alive_interval = smbd_keep_alive_interval;
+
+	if (info->id->device->attrs.max_send_sge < SMBDIRECT_MAX_SEND_SGE ||
+	    info->id->device->attrs.max_recv_sge < SMBDIRECT_MAX_RECV_SGE) {
+		log_rdma_event(ERR,
+			"device %.*s max_send_sge/max_recv_sge = %d/%d too small\n",
+			IB_DEVICE_NAME_MAX,
+			info->id->device->name,
+			info->id->device->attrs.max_send_sge,
+			info->id->device->attrs.max_recv_sge);
+		goto config_failed;
+	}
+
+	info->send_cq = NULL;
+	info->recv_cq = NULL;
+	info->send_cq =
+		ib_alloc_cq_any(info->id->device, info,
+				info->send_credit_target, IB_POLL_SOFTIRQ);
+	if (IS_ERR(info->send_cq)) {
+		info->send_cq = NULL;
+		goto alloc_cq_failed;
+	}
+
+	info->recv_cq =
+		ib_alloc_cq_any(info->id->device, info,
+				info->receive_credit_max, IB_POLL_SOFTIRQ);
+	if (IS_ERR(info->recv_cq)) {
+		info->recv_cq = NULL;
+		goto alloc_cq_failed;
+	}
+
+	memset(&qp_attr, 0, sizeof(qp_attr));
+	qp_attr.event_handler = smbd_qp_async_error_upcall;
+	qp_attr.qp_context = info;
+	qp_attr.cap.max_send_wr = info->send_credit_target;
+	qp_attr.cap.max_recv_wr = info->receive_credit_max;
+	qp_attr.cap.max_send_sge = SMBDIRECT_MAX_SEND_SGE;
+	qp_attr.cap.max_recv_sge = SMBDIRECT_MAX_RECV_SGE;
+	qp_attr.cap.max_inline_data = 0;
+	qp_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
+	qp_attr.qp_type = IB_QPT_RC;
+	qp_attr.send_cq = info->send_cq;
+	qp_attr.recv_cq = info->recv_cq;
+	qp_attr.port_num = ~0;
+
+	rc = rdma_create_qp(info->id, info->pd, &qp_attr);
+	if (rc) {
+		log_rdma_event(ERR, "rdma_create_qp failed %i\n", rc);
+		goto create_qp_failed;
+	}
+
+	memset(&conn_param, 0, sizeof(conn_param));
+	conn_param.initiator_depth = 0;
+
+	conn_param.responder_resources =
+		info->id->device->attrs.max_qp_rd_atom
+			< SMBD_CM_RESPONDER_RESOURCES ?
+		info->id->device->attrs.max_qp_rd_atom :
+		SMBD_CM_RESPONDER_RESOURCES;
+	info->responder_resources = conn_param.responder_resources;
+	log_rdma_mr(INFO, "responder_resources=%d\n",
+		info->responder_resources);
+
+	/* Need to send IRD/ORD in private data for iWARP */
+	info->id->device->ops.get_port_immutable(
+		info->id->device, info->id->port_num, &port_immutable);
+	if (port_immutable.core_cap_flags & RDMA_CORE_PORT_IWARP) {
+		ird_ord_hdr[0] = info->responder_resources;
+		ird_ord_hdr[1] = 1;
+		conn_param.private_data = ird_ord_hdr;
+		conn_param.private_data_len = sizeof(ird_ord_hdr);
+	} else {
+		conn_param.private_data = NULL;
+		conn_param.private_data_len = 0;
+	}
+
+	conn_param.retry_count = SMBD_CM_RETRY;
+	conn_param.rnr_retry_count = SMBD_CM_RNR_RETRY;
+	conn_param.flow_control = 0;
+
+	log_rdma_event(INFO, "connecting to IP %pI4 port %d\n",
+		&addr_in->sin_addr, port);
+
+	init_waitqueue_head(&info->conn_wait);
+	init_waitqueue_head(&info->disconn_wait);
+	init_waitqueue_head(&info->wait_reassembly_queue);
+	rc = rdma_connect(info->id, &conn_param);
+	if (rc) {
+		log_rdma_event(ERR, "rdma_connect() failed with %i\n", rc);
+		goto rdma_connect_failed;
+	}
+
+	wait_event_interruptible(
+		info->conn_wait, info->transport_status != SMBD_CONNECTING);
+
+	if (info->transport_status != SMBD_CONNECTED) {
+		log_rdma_event(ERR, "rdma_connect failed port=%d\n", port);
+		goto rdma_connect_failed;
+	}
+
+	log_rdma_event(INFO, "rdma_connect connected\n");
+
+	rc = allocate_caches_and_workqueue(info);
+	if (rc) {
+		log_rdma_event(ERR, "cache allocation failed\n");
+		goto allocate_cache_failed;
+	}
+
+	init_waitqueue_head(&info->wait_send_queue);
+	INIT_DELAYED_WORK(&info->idle_timer_work, idle_connection_timer);
+	queue_delayed_work(info->workqueue, &info->idle_timer_work,
+		info->keep_alive_interval*HZ);
+
+	init_waitqueue_head(&info->wait_send_pending);
+	atomic_set(&info->send_pending, 0);
+
+	init_waitqueue_head(&info->wait_post_send);
+
+	INIT_WORK(&info->disconnect_work, smbd_disconnect_rdma_work);
+	INIT_WORK(&info->post_send_credits_work, smbd_post_send_credits);
+	info->new_credits_offered = 0;
+	spin_lock_init(&info->lock_new_credits_offered);
+
+	rc = smbd_negotiate(info);
+	if (rc) {
+		log_rdma_event(ERR, "smbd_negotiate rc=%d\n", rc);
+		goto negotiation_failed;
+	}
+
+	rc = allocate_mr_list(info);
+	if (rc) {
+		log_rdma_mr(ERR, "memory registration allocation failed\n");
+		goto allocate_mr_failed;
+	}
+
+	return info;
+
+allocate_mr_failed:
+	/* At this point, need to a full transport shutdown */
+	server->smbd_conn = info;
+	smbd_destroy(server);
+	return NULL;
+
+negotiation_failed:
+	cancel_delayed_work_sync(&info->idle_timer_work);
+	destroy_caches_and_workqueue(info);
+	info->transport_status = SMBD_NEGOTIATE_FAILED;
+	init_waitqueue_head(&info->conn_wait);
+	rdma_disconnect(info->id);
+	wait_event(info->conn_wait,
+		info->transport_status == SMBD_DISCONNECTED);
+
+allocate_cache_failed:
+rdma_connect_failed:
+	rdma_destroy_qp(info->id);
+
+create_qp_failed:
+alloc_cq_failed:
+	if (info->send_cq)
+		ib_free_cq(info->send_cq);
+	if (info->recv_cq)
+		ib_free_cq(info->recv_cq);
+
+config_failed:
+	ib_dealloc_pd(info->pd);
+	rdma_destroy_id(info->id);
+
+create_id_failed:
+	kfree(info);
+	return NULL;
+}
+
+struct smbd_connection *smbd_get_connection(
+	struct TCP_Server_Info *server, struct sockaddr *dstaddr)
+{
+	struct smbd_connection *ret;
+	int port = SMBD_PORT;
+
+try_again:
+	ret = _smbd_get_connection(server, dstaddr, port);
+
+	/* Try SMB_PORT if SMBD_PORT doesn't work */
+	if (!ret && port == SMBD_PORT) {
+		port = SMB_PORT;
+		goto try_again;
+	}
+	return ret;
+}
+
+/*
+ * Receive data from receive reassembly queue
+ * All the incoming data packets are placed in reassembly queue
+ * buf: the buffer to read data into
+ * size: the length of data to read
+ * return value: actual data read
+ * Note: this implementation copies the data from reassebmly queue to receive
+ * buffers used by upper layer. This is not the optimal code path. A better way
+ * to do it is to not have upper layer allocate its receive buffers but rather
+ * borrow the buffer from reassembly queue, and return it after data is
+ * consumed. But this will require more changes to upper layer code, and also
+ * need to consider packet boundaries while they still being reassembled.
+ */
+static int smbd_recv_buf(struct smbd_connection *info, char *buf,
+		unsigned int size)
+{
+	struct smbd_response *response;
+	struct smbd_data_transfer *data_transfer;
+	int to_copy, to_read, data_read, offset;
+	u32 data_length, remaining_data_length, data_offset;
+	int rc;
+
+again:
+	/*
+	 * No need to hold the reassembly queue lock all the time as we are
+	 * the only one reading from the front of the queue. The transport
+	 * may add more entries to the back of the queue at the same time
+	 */
+	log_read(INFO, "size=%d info->reassembly_data_length=%d\n", size,
+		info->reassembly_data_length);
+	if (info->reassembly_data_length >= size) {
+		int queue_length;
+		int queue_removed = 0;
+
+		/*
+		 * Need to make sure reassembly_data_length is read before
+		 * reading reassembly_queue_length and calling
+		 * _get_first_reassembly. This call is lock free
+		 * as we never read at the end of the queue which are being
+		 * updated in SOFTIRQ as more data is received
+		 */
+		virt_rmb();
+		queue_length = info->reassembly_queue_length;
+		data_read = 0;
+		to_read = size;
+		offset = info->first_entry_offset;
+		while (data_read < size) {
+			response = _get_first_reassembly(info);
+			data_transfer = smbd_response_payload(response);
+			data_length = le32_to_cpu(data_transfer->data_length);
+			remaining_data_length =
+				le32_to_cpu(
+					data_transfer->remaining_data_length);
+			data_offset = le32_to_cpu(data_transfer->data_offset);
+
+			/*
+			 * The upper layer expects RFC1002 length at the
+			 * beginning of the payload. Return it to indicate
+			 * the total length of the packet. This minimize the
+			 * change to upper layer packet processing logic. This
+			 * will be eventually remove when an intermediate
+			 * transport layer is added
+			 */
+			if (response->first_segment && size == 4) {
+				unsigned int rfc1002_len =
+					data_length + remaining_data_length;
+				*((__be32 *)buf) = cpu_to_be32(rfc1002_len);
+				data_read = 4;
+				response->first_segment = false;
+				log_read(INFO, "returning rfc1002 length %d\n",
+					rfc1002_len);
+				goto read_rfc1002_done;
+			}
+
+			to_copy = min_t(int, data_length - offset, to_read);
+			memcpy(
+				buf + data_read,
+				(char *)data_transfer + data_offset + offset,
+				to_copy);
+
+			/* move on to the next buffer? */
+			if (to_copy == data_length - offset) {
+				queue_length--;
+				/*
+				 * No need to lock if we are not at the
+				 * end of the queue
+				 */
+				if (queue_length)
+					list_del(&response->list);
+				else {
+					spin_lock_irq(
+						&info->reassembly_queue_lock);
+					list_del(&response->list);
+					spin_unlock_irq(
+						&info->reassembly_queue_lock);
+				}
+				queue_removed++;
+				info->count_reassembly_queue--;
+				info->count_dequeue_reassembly_queue++;
+				put_receive_buffer(info, response);
+				offset = 0;
+				log_read(INFO, "put_receive_buffer offset=0\n");
+			} else
+				offset += to_copy;
+
+			to_read -= to_copy;
+			data_read += to_copy;
+
+			log_read(INFO, "_get_first_reassembly memcpy %d bytes data_transfer_length-offset=%d after that to_read=%d data_read=%d offset=%d\n",
+				 to_copy, data_length - offset,
+				 to_read, data_read, offset);
+		}
+
+		spin_lock_irq(&info->reassembly_queue_lock);
+		info->reassembly_data_length -= data_read;
+		info->reassembly_queue_length -= queue_removed;
+		spin_unlock_irq(&info->reassembly_queue_lock);
+
+		info->first_entry_offset = offset;
+		log_read(INFO, "returning to thread data_read=%d reassembly_data_length=%d first_entry_offset=%d\n",
+			 data_read, info->reassembly_data_length,
+			 info->first_entry_offset);
+read_rfc1002_done:
+		return data_read;
+	}
+
+	log_read(INFO, "wait_event on more data\n");
+	rc = wait_event_interruptible(
+		info->wait_reassembly_queue,
+		info->reassembly_data_length >= size ||
+			info->transport_status != SMBD_CONNECTED);
+	/* Don't return any data if interrupted */
+	if (rc)
+		return rc;
+
+	if (info->transport_status != SMBD_CONNECTED) {
+		log_read(ERR, "disconnected\n");
+		return -ECONNABORTED;
+	}
+
+	goto again;
+}
+
+/*
+ * Receive a page from receive reassembly queue
+ * page: the page to read data into
+ * to_read: the length of data to read
+ * return value: actual data read
+ */
+static int smbd_recv_page(struct smbd_connection *info,
+		struct page *page, unsigned int page_offset,
+		unsigned int to_read)
+{
+	int ret;
+	char *to_address;
+	void *page_address;
+
+	/* make sure we have the page ready for read */
+	ret = wait_event_interruptible(
+		info->wait_reassembly_queue,
+		info->reassembly_data_length >= to_read ||
+			info->transport_status != SMBD_CONNECTED);
+	if (ret)
+		return ret;
+
+	/* now we can read from reassembly queue and not sleep */
+	page_address = kmap_atomic(page);
+	to_address = (char *) page_address + page_offset;
+
+	log_read(INFO, "reading from page=%p address=%p to_read=%d\n",
+		page, to_address, to_read);
+
+	ret = smbd_recv_buf(info, to_address, to_read);
+	kunmap_atomic(page_address);
+
+	return ret;
+}
+
+/*
+ * Receive data from transport
+ * msg: a msghdr point to the buffer, can be ITER_KVEC or ITER_BVEC
+ * return: total bytes read, or 0. SMB Direct will not do partial read.
+ */
+int smbd_recv(struct smbd_connection *info, struct msghdr *msg)
+{
+	char *buf;
+	struct page *page;
+	unsigned int to_read, page_offset;
+	int rc;
+
+	if (iov_iter_rw(&msg->msg_iter) == WRITE) {
+		/* It's a bug in upper layer to get there */
+		cifs_dbg(VFS, "Invalid msg iter dir %u\n",
+			 iov_iter_rw(&msg->msg_iter));
+		rc = -EINVAL;
+		goto out;
+	}
+
+	switch (iov_iter_type(&msg->msg_iter)) {
+	case ITER_KVEC:
+		buf = msg->msg_iter.kvec->iov_base;
+		to_read = msg->msg_iter.kvec->iov_len;
+		rc = smbd_recv_buf(info, buf, to_read);
+		break;
+
+	case ITER_BVEC:
+		page = msg->msg_iter.bvec->bv_page;
+		page_offset = msg->msg_iter.bvec->bv_offset;
+		to_read = msg->msg_iter.bvec->bv_len;
+		rc = smbd_recv_page(info, page, page_offset, to_read);
+		break;
+
+	default:
+		/* It's a bug in upper layer to get there */
+		cifs_dbg(VFS, "Invalid msg type %d\n",
+			 iov_iter_type(&msg->msg_iter));
+		rc = -EINVAL;
+	}
+
+out:
+	/* SMBDirect will read it all or nothing */
+	if (rc > 0)
+		msg->msg_iter.count = 0;
+	return rc;
+}
+
+/*
+ * Send data to transport
+ * Each rqst is transported as a SMBDirect payload
+ * rqst: the data to write
+ * return value: 0 if successfully write, otherwise error code
+ */
+int smbd_send(struct TCP_Server_Info *server,
+	int num_rqst, struct smb_rqst *rqst_array)
+{
+	struct smbd_connection *info = server->smbd_conn;
+	struct smb_rqst *rqst;
+	struct iov_iter iter;
+	unsigned int remaining_data_length, klen;
+	int rc, i, rqst_idx;
+
+	if (info->transport_status != SMBD_CONNECTED)
+		return -EAGAIN;
+
+	/*
+	 * Add in the page array if there is one. The caller needs to set
+	 * rq_tailsz to PAGE_SIZE when the buffer has multiple pages and
+	 * ends at page boundary
+	 */
+	remaining_data_length = 0;
+	for (i = 0; i < num_rqst; i++)
+		remaining_data_length += smb_rqst_len(server, &rqst_array[i]);
+
+	if (unlikely(remaining_data_length > info->max_fragmented_send_size)) {
+		/* assertion: payload never exceeds negotiated maximum */
+		log_write(ERR, "payload size %d > max size %d\n",
+			remaining_data_length, info->max_fragmented_send_size);
+		return -EINVAL;
+	}
+
+	log_write(INFO, "num_rqst=%d total length=%u\n",
+			num_rqst, remaining_data_length);
+
+	rqst_idx = 0;
+	do {
+		rqst = &rqst_array[rqst_idx];
+
+		cifs_dbg(FYI, "Sending smb (RDMA): idx=%d smb_len=%lu\n",
+			 rqst_idx, smb_rqst_len(server, rqst));
+		for (i = 0; i < rqst->rq_nvec; i++)
+			dump_smb(rqst->rq_iov[i].iov_base, rqst->rq_iov[i].iov_len);
+
+		log_write(INFO, "RDMA-WR[%u] nvec=%d len=%u iter=%zu rqlen=%lu\n",
+			  rqst_idx, rqst->rq_nvec, remaining_data_length,
+			  iov_iter_count(&rqst->rq_iter), smb_rqst_len(server, rqst));
+
+		/* Send the metadata pages. */
+		klen = 0;
+		for (i = 0; i < rqst->rq_nvec; i++)
+			klen += rqst->rq_iov[i].iov_len;
+		iov_iter_kvec(&iter, ITER_SOURCE, rqst->rq_iov, rqst->rq_nvec, klen);
+
+		rc = smbd_post_send_iter(info, &iter, &remaining_data_length);
+		if (rc < 0)
+			break;
+
+		if (iov_iter_count(&rqst->rq_iter) > 0) {
+			/* And then the data pages if there are any */
+			rc = smbd_post_send_iter(info, &rqst->rq_iter,
+						 &remaining_data_length);
+			if (rc < 0)
+				break;
+		}
+
+	} while (++rqst_idx < num_rqst);
+
+	/*
+	 * As an optimization, we don't wait for individual I/O to finish
+	 * before sending the next one.
+	 * Send them all and wait for pending send count to get to 0
+	 * that means all the I/Os have been out and we are good to return
+	 */
+
+	wait_event(info->wait_send_pending,
+		atomic_read(&info->send_pending) == 0);
+
+	return rc;
+}
+
+static void register_mr_done(struct ib_cq *cq, struct ib_wc *wc)
+{
+	struct smbd_mr *mr;
+	struct ib_cqe *cqe;
+
+	if (wc->status) {
+		log_rdma_mr(ERR, "status=%d\n", wc->status);
+		cqe = wc->wr_cqe;
+		mr = container_of(cqe, struct smbd_mr, cqe);
+		smbd_disconnect_rdma_connection(mr->conn);
+	}
+}
+
+/*
+ * The work queue function that recovers MRs
+ * We need to call ib_dereg_mr() and ib_alloc_mr() before this MR can be used
+ * again. Both calls are slow, so finish them in a workqueue. This will not
+ * block I/O path.
+ * There is one workqueue that recovers MRs, there is no need to lock as the
+ * I/O requests calling smbd_register_mr will never update the links in the
+ * mr_list.
+ */
+static void smbd_mr_recovery_work(struct work_struct *work)
+{
+	struct smbd_connection *info =
+		container_of(work, struct smbd_connection, mr_recovery_work);
+	struct smbd_mr *smbdirect_mr;
+	int rc;
+
+	list_for_each_entry(smbdirect_mr, &info->mr_list, list) {
+		if (smbdirect_mr->state == MR_ERROR) {
+
+			/* recover this MR entry */
+			rc = ib_dereg_mr(smbdirect_mr->mr);
+			if (rc) {
+				log_rdma_mr(ERR,
+					"ib_dereg_mr failed rc=%x\n",
+					rc);
+				smbd_disconnect_rdma_connection(info);
+				continue;
+			}
+
+			smbdirect_mr->mr = ib_alloc_mr(
+				info->pd, info->mr_type,
+				info->max_frmr_depth);
+			if (IS_ERR(smbdirect_mr->mr)) {
+				log_rdma_mr(ERR, "ib_alloc_mr failed mr_type=%x max_frmr_depth=%x\n",
+					    info->mr_type,
+					    info->max_frmr_depth);
+				smbd_disconnect_rdma_connection(info);
+				continue;
+			}
+		} else
+			/* This MR is being used, don't recover it */
+			continue;
+
+		smbdirect_mr->state = MR_READY;
+
+		/* smbdirect_mr->state is updated by this function
+		 * and is read and updated by I/O issuing CPUs trying
+		 * to get a MR, the call to atomic_inc_return
+		 * implicates a memory barrier and guarantees this
+		 * value is updated before waking up any calls to
+		 * get_mr() from the I/O issuing CPUs
+		 */
+		if (atomic_inc_return(&info->mr_ready_count) == 1)
+			wake_up_interruptible(&info->wait_mr);
+	}
+}
+
+static void destroy_mr_list(struct smbd_connection *info)
+{
+	struct smbd_mr *mr, *tmp;
+
+	cancel_work_sync(&info->mr_recovery_work);
+	list_for_each_entry_safe(mr, tmp, &info->mr_list, list) {
+		if (mr->state == MR_INVALIDATED)
+			ib_dma_unmap_sg(info->id->device, mr->sgt.sgl,
+				mr->sgt.nents, mr->dir);
+		ib_dereg_mr(mr->mr);
+		kfree(mr->sgt.sgl);
+		kfree(mr);
+	}
+}
+
+/*
+ * Allocate MRs used for RDMA read/write
+ * The number of MRs will not exceed hardware capability in responder_resources
+ * All MRs are kept in mr_list. The MR can be recovered after it's used
+ * Recovery is done in smbd_mr_recovery_work. The content of list entry changes
+ * as MRs are used and recovered for I/O, but the list links will not change
+ */
+static int allocate_mr_list(struct smbd_connection *info)
+{
+	int i;
+	struct smbd_mr *smbdirect_mr, *tmp;
+
+	INIT_LIST_HEAD(&info->mr_list);
+	init_waitqueue_head(&info->wait_mr);
+	spin_lock_init(&info->mr_list_lock);
+	atomic_set(&info->mr_ready_count, 0);
+	atomic_set(&info->mr_used_count, 0);
+	init_waitqueue_head(&info->wait_for_mr_cleanup);
+	INIT_WORK(&info->mr_recovery_work, smbd_mr_recovery_work);
+	/* Allocate more MRs (2x) than hardware responder_resources */
+	for (i = 0; i < info->responder_resources * 2; i++) {
+		smbdirect_mr = kzalloc(sizeof(*smbdirect_mr), GFP_KERNEL);
+		if (!smbdirect_mr)
+			goto out;
+		smbdirect_mr->mr = ib_alloc_mr(info->pd, info->mr_type,
+					info->max_frmr_depth);
+		if (IS_ERR(smbdirect_mr->mr)) {
+			log_rdma_mr(ERR, "ib_alloc_mr failed mr_type=%x max_frmr_depth=%x\n",
+				    info->mr_type, info->max_frmr_depth);
+			goto out;
+		}
+		smbdirect_mr->sgt.sgl = kcalloc(info->max_frmr_depth,
+						sizeof(struct scatterlist),
+						GFP_KERNEL);
+		if (!smbdirect_mr->sgt.sgl) {
+			log_rdma_mr(ERR, "failed to allocate sgl\n");
+			ib_dereg_mr(smbdirect_mr->mr);
+			goto out;
+		}
+		smbdirect_mr->state = MR_READY;
+		smbdirect_mr->conn = info;
+
+		list_add_tail(&smbdirect_mr->list, &info->mr_list);
+		atomic_inc(&info->mr_ready_count);
+	}
+	return 0;
+
+out:
+	kfree(smbdirect_mr);
+
+	list_for_each_entry_safe(smbdirect_mr, tmp, &info->mr_list, list) {
+		list_del(&smbdirect_mr->list);
+		ib_dereg_mr(smbdirect_mr->mr);
+		kfree(smbdirect_mr->sgt.sgl);
+		kfree(smbdirect_mr);
+	}
+	return -ENOMEM;
+}
+
+/*
+ * Get a MR from mr_list. This function waits until there is at least one
+ * MR available in the list. It may access the list while the
+ * smbd_mr_recovery_work is recovering the MR list. This doesn't need a lock
+ * as they never modify the same places. However, there may be several CPUs
+ * issueing I/O trying to get MR at the same time, mr_list_lock is used to
+ * protect this situation.
+ */
+static struct smbd_mr *get_mr(struct smbd_connection *info)
+{
+	struct smbd_mr *ret;
+	int rc;
+again:
+	rc = wait_event_interruptible(info->wait_mr,
+		atomic_read(&info->mr_ready_count) ||
+		info->transport_status != SMBD_CONNECTED);
+	if (rc) {
+		log_rdma_mr(ERR, "wait_event_interruptible rc=%x\n", rc);
+		return NULL;
+	}
+
+	if (info->transport_status != SMBD_CONNECTED) {
+		log_rdma_mr(ERR, "info->transport_status=%x\n",
+			info->transport_status);
+		return NULL;
+	}
+
+	spin_lock(&info->mr_list_lock);
+	list_for_each_entry(ret, &info->mr_list, list) {
+		if (ret->state == MR_READY) {
+			ret->state = MR_REGISTERED;
+			spin_unlock(&info->mr_list_lock);
+			atomic_dec(&info->mr_ready_count);
+			atomic_inc(&info->mr_used_count);
+			return ret;
+		}
+	}
+
+	spin_unlock(&info->mr_list_lock);
+	/*
+	 * It is possible that we could fail to get MR because other processes may
+	 * try to acquire a MR at the same time. If this is the case, retry it.
+	 */
+	goto again;
+}
+
+/*
+ * Transcribe the pages from an iterator into an MR scatterlist.
+ */
+static int smbd_iter_to_mr(struct smbd_connection *info,
+			   struct iov_iter *iter,
+			   struct sg_table *sgt,
+			   unsigned int max_sg)
+{
+	int ret;
+
+	memset(sgt->sgl, 0, max_sg * sizeof(struct scatterlist));
+
+	ret = extract_iter_to_sg(iter, iov_iter_count(iter), sgt, max_sg, 0);
+	WARN_ON(ret < 0);
+	if (sgt->nents > 0)
+		sg_mark_end(&sgt->sgl[sgt->nents - 1]);
+	return ret;
+}
+
+/*
+ * Register memory for RDMA read/write
+ * iter: the buffer to register memory with
+ * writing: true if this is a RDMA write (SMB read), false for RDMA read
+ * need_invalidate: true if this MR needs to be locally invalidated after I/O
+ * return value: the MR registered, NULL if failed.
+ */
+struct smbd_mr *smbd_register_mr(struct smbd_connection *info,
+				 struct iov_iter *iter,
+				 bool writing, bool need_invalidate)
+{
+	struct smbd_mr *smbdirect_mr;
+	int rc, num_pages;
+	enum dma_data_direction dir;
+	struct ib_reg_wr *reg_wr;
+
+	num_pages = iov_iter_npages(iter, info->max_frmr_depth + 1);
+	if (num_pages > info->max_frmr_depth) {
+		log_rdma_mr(ERR, "num_pages=%d max_frmr_depth=%d\n",
+			num_pages, info->max_frmr_depth);
+		WARN_ON_ONCE(1);
+		return NULL;
+	}
+
+	smbdirect_mr = get_mr(info);
+	if (!smbdirect_mr) {
+		log_rdma_mr(ERR, "get_mr returning NULL\n");
+		return NULL;
+	}
+
+	dir = writing ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
+	smbdirect_mr->dir = dir;
+	smbdirect_mr->need_invalidate = need_invalidate;
+	smbdirect_mr->sgt.nents = 0;
+	smbdirect_mr->sgt.orig_nents = 0;
+
+	log_rdma_mr(INFO, "num_pages=0x%x count=0x%zx depth=%u\n",
+		    num_pages, iov_iter_count(iter), info->max_frmr_depth);
+	smbd_iter_to_mr(info, iter, &smbdirect_mr->sgt, info->max_frmr_depth);
+
+	rc = ib_dma_map_sg(info->id->device, smbdirect_mr->sgt.sgl,
+			   smbdirect_mr->sgt.nents, dir);
+	if (!rc) {
+		log_rdma_mr(ERR, "ib_dma_map_sg num_pages=%x dir=%x rc=%x\n",
+			num_pages, dir, rc);
+		goto dma_map_error;
+	}
+
+	rc = ib_map_mr_sg(smbdirect_mr->mr, smbdirect_mr->sgt.sgl,
+			  smbdirect_mr->sgt.nents, NULL, PAGE_SIZE);
+	if (rc != smbdirect_mr->sgt.nents) {
+		log_rdma_mr(ERR,
+			"ib_map_mr_sg failed rc = %d nents = %x\n",
+			rc, smbdirect_mr->sgt.nents);
+		goto map_mr_error;
+	}
+
+	ib_update_fast_reg_key(smbdirect_mr->mr,
+		ib_inc_rkey(smbdirect_mr->mr->rkey));
+	reg_wr = &smbdirect_mr->wr;
+	reg_wr->wr.opcode = IB_WR_REG_MR;
+	smbdirect_mr->cqe.done = register_mr_done;
+	reg_wr->wr.wr_cqe = &smbdirect_mr->cqe;
+	reg_wr->wr.num_sge = 0;
+	reg_wr->wr.send_flags = IB_SEND_SIGNALED;
+	reg_wr->mr = smbdirect_mr->mr;
+	reg_wr->key = smbdirect_mr->mr->rkey;
+	reg_wr->access = writing ?
+			IB_ACCESS_REMOTE_WRITE | IB_ACCESS_LOCAL_WRITE :
+			IB_ACCESS_REMOTE_READ;
+
+	/*
+	 * There is no need for waiting for complemtion on ib_post_send
+	 * on IB_WR_REG_MR. Hardware enforces a barrier and order of execution
+	 * on the next ib_post_send when we actaully send I/O to remote peer
+	 */
+	rc = ib_post_send(info->id->qp, &reg_wr->wr, NULL);
+	if (!rc)
+		return smbdirect_mr;
+
+	log_rdma_mr(ERR, "ib_post_send failed rc=%x reg_wr->key=%x\n",
+		rc, reg_wr->key);
+
+	/* If all failed, attempt to recover this MR by setting it MR_ERROR*/
+map_mr_error:
+	ib_dma_unmap_sg(info->id->device, smbdirect_mr->sgt.sgl,
+			smbdirect_mr->sgt.nents, smbdirect_mr->dir);
+
+dma_map_error:
+	smbdirect_mr->state = MR_ERROR;
+	if (atomic_dec_and_test(&info->mr_used_count))
+		wake_up(&info->wait_for_mr_cleanup);
+
+	smbd_disconnect_rdma_connection(info);
+
+	return NULL;
+}
+
+static void local_inv_done(struct ib_cq *cq, struct ib_wc *wc)
+{
+	struct smbd_mr *smbdirect_mr;
+	struct ib_cqe *cqe;
+
+	cqe = wc->wr_cqe;
+	smbdirect_mr = container_of(cqe, struct smbd_mr, cqe);
+	smbdirect_mr->state = MR_INVALIDATED;
+	if (wc->status != IB_WC_SUCCESS) {
+		log_rdma_mr(ERR, "invalidate failed status=%x\n", wc->status);
+		smbdirect_mr->state = MR_ERROR;
+	}
+	complete(&smbdirect_mr->invalidate_done);
+}
+
+/*
+ * Deregister a MR after I/O is done
+ * This function may wait if remote invalidation is not used
+ * and we have to locally invalidate the buffer to prevent data is being
+ * modified by remote peer after upper layer consumes it
+ */
+int smbd_deregister_mr(struct smbd_mr *smbdirect_mr)
+{
+	struct ib_send_wr *wr;
+	struct smbd_connection *info = smbdirect_mr->conn;
+	int rc = 0;
+
+	if (smbdirect_mr->need_invalidate) {
+		/* Need to finish local invalidation before returning */
+		wr = &smbdirect_mr->inv_wr;
+		wr->opcode = IB_WR_LOCAL_INV;
+		smbdirect_mr->cqe.done = local_inv_done;
+		wr->wr_cqe = &smbdirect_mr->cqe;
+		wr->num_sge = 0;
+		wr->ex.invalidate_rkey = smbdirect_mr->mr->rkey;
+		wr->send_flags = IB_SEND_SIGNALED;
+
+		init_completion(&smbdirect_mr->invalidate_done);
+		rc = ib_post_send(info->id->qp, wr, NULL);
+		if (rc) {
+			log_rdma_mr(ERR, "ib_post_send failed rc=%x\n", rc);
+			smbd_disconnect_rdma_connection(info);
+			goto done;
+		}
+		wait_for_completion(&smbdirect_mr->invalidate_done);
+		smbdirect_mr->need_invalidate = false;
+	} else
+		/*
+		 * For remote invalidation, just set it to MR_INVALIDATED
+		 * and defer to mr_recovery_work to recover the MR for next use
+		 */
+		smbdirect_mr->state = MR_INVALIDATED;
+
+	if (smbdirect_mr->state == MR_INVALIDATED) {
+		ib_dma_unmap_sg(
+			info->id->device, smbdirect_mr->sgt.sgl,
+			smbdirect_mr->sgt.nents,
+			smbdirect_mr->dir);
+		smbdirect_mr->state = MR_READY;
+		if (atomic_inc_return(&info->mr_ready_count) == 1)
+			wake_up_interruptible(&info->wait_mr);
+	} else
+		/*
+		 * Schedule the work to do MR recovery for future I/Os MR
+		 * recovery is slow and don't want it to block current I/O
+		 */
+		queue_work(info->workqueue, &info->mr_recovery_work);
+
+done:
+	if (atomic_dec_and_test(&info->mr_used_count))
+		wake_up(&info->wait_for_mr_cleanup);
+
+	return rc;
+}
+
+static bool smb_set_sge(struct smb_extract_to_rdma *rdma,
+			struct page *lowest_page, size_t off, size_t len)
+{
+	struct ib_sge *sge = &rdma->sge[rdma->nr_sge];
+	u64 addr;
+
+	addr = ib_dma_map_page(rdma->device, lowest_page,
+			       off, len, rdma->direction);
+	if (ib_dma_mapping_error(rdma->device, addr))
+		return false;
+
+	sge->addr   = addr;
+	sge->length = len;
+	sge->lkey   = rdma->local_dma_lkey;
+	rdma->nr_sge++;
+	return true;
+}
+
+/*
+ * Extract page fragments from a BVEC-class iterator and add them to an RDMA
+ * element list.  The pages are not pinned.
+ */
+static ssize_t smb_extract_bvec_to_rdma(struct iov_iter *iter,
+					struct smb_extract_to_rdma *rdma,
+					ssize_t maxsize)
+{
+	const struct bio_vec *bv = iter->bvec;
+	unsigned long start = iter->iov_offset;
+	unsigned int i;
+	ssize_t ret = 0;
+
+	for (i = 0; i < iter->nr_segs; i++) {
+		size_t off, len;
+
+		len = bv[i].bv_len;
+		if (start >= len) {
+			start -= len;
+			continue;
+		}
+
+		len = min_t(size_t, maxsize, len - start);
+		off = bv[i].bv_offset + start;
+
+		if (!smb_set_sge(rdma, bv[i].bv_page, off, len))
+			return -EIO;
+
+		ret += len;
+		maxsize -= len;
+		if (rdma->nr_sge >= rdma->max_sge || maxsize <= 0)
+			break;
+		start = 0;
+	}
+
+	return ret;
+}
+
+/*
+ * Extract fragments from a KVEC-class iterator and add them to an RDMA list.
+ * This can deal with vmalloc'd buffers as well as kmalloc'd or static buffers.
+ * The pages are not pinned.
+ */
+static ssize_t smb_extract_kvec_to_rdma(struct iov_iter *iter,
+					struct smb_extract_to_rdma *rdma,
+					ssize_t maxsize)
+{
+	const struct kvec *kv = iter->kvec;
+	unsigned long start = iter->iov_offset;
+	unsigned int i;
+	ssize_t ret = 0;
+
+	for (i = 0; i < iter->nr_segs; i++) {
+		struct page *page;
+		unsigned long kaddr;
+		size_t off, len, seg;
+
+		len = kv[i].iov_len;
+		if (start >= len) {
+			start -= len;
+			continue;
+		}
+
+		kaddr = (unsigned long)kv[i].iov_base + start;
+		off = kaddr & ~PAGE_MASK;
+		len = min_t(size_t, maxsize, len - start);
+		kaddr &= PAGE_MASK;
+
+		maxsize -= len;
+		do {
+			seg = min_t(size_t, len, PAGE_SIZE - off);
+
+			if (is_vmalloc_or_module_addr((void *)kaddr))
+				page = vmalloc_to_page((void *)kaddr);
+			else
+				page = virt_to_page((void *)kaddr);
+
+			if (!smb_set_sge(rdma, page, off, seg))
+				return -EIO;
+
+			ret += seg;
+			len -= seg;
+			kaddr += PAGE_SIZE;
+			off = 0;
+		} while (len > 0 && rdma->nr_sge < rdma->max_sge);
+
+		if (rdma->nr_sge >= rdma->max_sge || maxsize <= 0)
+			break;
+		start = 0;
+	}
+
+	return ret;
+}
+
+/*
+ * Extract folio fragments from an XARRAY-class iterator and add them to an
+ * RDMA list.  The folios are not pinned.
+ */
+static ssize_t smb_extract_xarray_to_rdma(struct iov_iter *iter,
+					  struct smb_extract_to_rdma *rdma,
+					  ssize_t maxsize)
+{
+	struct xarray *xa = iter->xarray;
+	struct folio *folio;
+	loff_t start = iter->xarray_start + iter->iov_offset;
+	pgoff_t index = start / PAGE_SIZE;
+	ssize_t ret = 0;
+	size_t off, len;
+	XA_STATE(xas, xa, index);
+
+	rcu_read_lock();
+
+	xas_for_each(&xas, folio, ULONG_MAX) {
+		if (xas_retry(&xas, folio))
+			continue;
+		if (WARN_ON(xa_is_value(folio)))
+			break;
+		if (WARN_ON(folio_test_hugetlb(folio)))
+			break;
+
+		off = offset_in_folio(folio, start);
+		len = min_t(size_t, maxsize, folio_size(folio) - off);
+
+		if (!smb_set_sge(rdma, folio_page(folio, 0), off, len)) {
+			rcu_read_unlock();
+			return -EIO;
+		}
+
+		maxsize -= len;
+		ret += len;
+		if (rdma->nr_sge >= rdma->max_sge || maxsize <= 0)
+			break;
+	}
+
+	rcu_read_unlock();
+	return ret;
+}
+
+/*
+ * Extract page fragments from up to the given amount of the source iterator
+ * and build up an RDMA list that refers to all of those bits.  The RDMA list
+ * is appended to, up to the maximum number of elements set in the parameter
+ * block.
+ *
+ * The extracted page fragments are not pinned or ref'd in any way; if an
+ * IOVEC/UBUF-type iterator is to be used, it should be converted to a
+ * BVEC-type iterator and the pages pinned, ref'd or otherwise held in some
+ * way.
+ */
+static ssize_t smb_extract_iter_to_rdma(struct iov_iter *iter, size_t len,
+					struct smb_extract_to_rdma *rdma)
+{
+	ssize_t ret;
+	int before = rdma->nr_sge;
+
+	switch (iov_iter_type(iter)) {
+	case ITER_BVEC:
+		ret = smb_extract_bvec_to_rdma(iter, rdma, len);
+		break;
+	case ITER_KVEC:
+		ret = smb_extract_kvec_to_rdma(iter, rdma, len);
+		break;
+	case ITER_XARRAY:
+		ret = smb_extract_xarray_to_rdma(iter, rdma, len);
+		break;
+	default:
+		WARN_ON_ONCE(1);
+		return -EIO;
+	}
+
+	if (ret > 0) {
+		iov_iter_advance(iter, ret);
+	} else if (ret < 0) {
+		while (rdma->nr_sge > before) {
+			struct ib_sge *sge = &rdma->sge[rdma->nr_sge--];
+
+			ib_dma_unmap_single(rdma->device, sge->addr, sge->length,
+					    rdma->direction);
+			sge->addr = 0;
+		}
+	}
+
+	return ret;
+}
diff --git a/fs/smb/client/smbdirect.h b/fs/smb/client/smbdirect.h
new file mode 100644
index 0000000000..83f239f376
--- /dev/null
+++ b/fs/smb/client/smbdirect.h
@@ -0,0 +1,319 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ *   Copyright (C) 2017, Microsoft Corporation.
+ *
+ *   Author(s): Long Li <longli@microsoft.com>
+ */
+#ifndef _SMBDIRECT_H
+#define _SMBDIRECT_H
+
+#ifdef CONFIG_CIFS_SMB_DIRECT
+#define cifs_rdma_enabled(server)	((server)->rdma)
+
+#include "cifsglob.h"
+#include <rdma/ib_verbs.h>
+#include <rdma/rdma_cm.h>
+#include <linux/mempool.h>
+
+extern int rdma_readwrite_threshold;
+extern int smbd_max_frmr_depth;
+extern int smbd_keep_alive_interval;
+extern int smbd_max_receive_size;
+extern int smbd_max_fragmented_recv_size;
+extern int smbd_max_send_size;
+extern int smbd_send_credit_target;
+extern int smbd_receive_credit_max;
+
+enum keep_alive_status {
+	KEEP_ALIVE_NONE,
+	KEEP_ALIVE_PENDING,
+	KEEP_ALIVE_SENT,
+};
+
+enum smbd_connection_status {
+	SMBD_CREATED,
+	SMBD_CONNECTING,
+	SMBD_CONNECTED,
+	SMBD_NEGOTIATE_FAILED,
+	SMBD_DISCONNECTING,
+	SMBD_DISCONNECTED,
+	SMBD_DESTROYED
+};
+
+/*
+ * The context for the SMBDirect transport
+ * Everything related to the transport is here. It has several logical parts
+ * 1. RDMA related structures
+ * 2. SMBDirect connection parameters
+ * 3. Memory registrations
+ * 4. Receive and reassembly queues for data receive path
+ * 5. mempools for allocating packets
+ */
+struct smbd_connection {
+	enum smbd_connection_status transport_status;
+
+	/* RDMA related */
+	struct rdma_cm_id *id;
+	struct ib_qp_init_attr qp_attr;
+	struct ib_pd *pd;
+	struct ib_cq *send_cq, *recv_cq;
+	struct ib_device_attr dev_attr;
+	int ri_rc;
+	struct completion ri_done;
+	wait_queue_head_t conn_wait;
+	wait_queue_head_t disconn_wait;
+
+	struct completion negotiate_completion;
+	bool negotiate_done;
+
+	struct work_struct disconnect_work;
+	struct work_struct post_send_credits_work;
+
+	spinlock_t lock_new_credits_offered;
+	int new_credits_offered;
+
+	/* Connection parameters defined in [MS-SMBD] 3.1.1.1 */
+	int receive_credit_max;
+	int send_credit_target;
+	int max_send_size;
+	int max_fragmented_recv_size;
+	int max_fragmented_send_size;
+	int max_receive_size;
+	int keep_alive_interval;
+	int max_readwrite_size;
+	enum keep_alive_status keep_alive_requested;
+	int protocol;
+	atomic_t send_credits;
+	atomic_t receive_credits;
+	int receive_credit_target;
+	int fragment_reassembly_remaining;
+
+	/* Memory registrations */
+	/* Maximum number of RDMA read/write outstanding on this connection */
+	int responder_resources;
+	/* Maximum number of pages in a single RDMA write/read on this connection */
+	int max_frmr_depth;
+	/*
+	 * If payload is less than or equal to the threshold,
+	 * use RDMA send/recv to send upper layer I/O.
+	 * If payload is more than the threshold,
+	 * use RDMA read/write through memory registration for I/O.
+	 */
+	int rdma_readwrite_threshold;
+	enum ib_mr_type mr_type;
+	struct list_head mr_list;
+	spinlock_t mr_list_lock;
+	/* The number of available MRs ready for memory registration */
+	atomic_t mr_ready_count;
+	atomic_t mr_used_count;
+	wait_queue_head_t wait_mr;
+	struct work_struct mr_recovery_work;
+	/* Used by transport to wait until all MRs are returned */
+	wait_queue_head_t wait_for_mr_cleanup;
+
+	/* Activity accoutning */
+	atomic_t send_pending;
+	wait_queue_head_t wait_send_pending;
+	wait_queue_head_t wait_post_send;
+
+	/* Receive queue */
+	struct list_head receive_queue;
+	int count_receive_queue;
+	spinlock_t receive_queue_lock;
+
+	struct list_head empty_packet_queue;
+	int count_empty_packet_queue;
+	spinlock_t empty_packet_queue_lock;
+
+	wait_queue_head_t wait_receive_queues;
+
+	/* Reassembly queue */
+	struct list_head reassembly_queue;
+	spinlock_t reassembly_queue_lock;
+	wait_queue_head_t wait_reassembly_queue;
+
+	/* total data length of reassembly queue */
+	int reassembly_data_length;
+	int reassembly_queue_length;
+	/* the offset to first buffer in reassembly queue */
+	int first_entry_offset;
+
+	bool send_immediate;
+
+	wait_queue_head_t wait_send_queue;
+
+	/*
+	 * Indicate if we have received a full packet on the connection
+	 * This is used to identify the first SMBD packet of a assembled
+	 * payload (SMB packet) in reassembly queue so we can return a
+	 * RFC1002 length to upper layer to indicate the length of the SMB
+	 * packet received
+	 */
+	bool full_packet_received;
+
+	struct workqueue_struct *workqueue;
+	struct delayed_work idle_timer_work;
+
+	/* Memory pool for preallocating buffers */
+	/* request pool for RDMA send */
+	struct kmem_cache *request_cache;
+	mempool_t *request_mempool;
+
+	/* response pool for RDMA receive */
+	struct kmem_cache *response_cache;
+	mempool_t *response_mempool;
+
+	/* for debug purposes */
+	unsigned int count_get_receive_buffer;
+	unsigned int count_put_receive_buffer;
+	unsigned int count_reassembly_queue;
+	unsigned int count_enqueue_reassembly_queue;
+	unsigned int count_dequeue_reassembly_queue;
+	unsigned int count_send_empty;
+};
+
+enum smbd_message_type {
+	SMBD_NEGOTIATE_RESP,
+	SMBD_TRANSFER_DATA,
+};
+
+#define SMB_DIRECT_RESPONSE_REQUESTED 0x0001
+
+/* SMBD negotiation request packet [MS-SMBD] 2.2.1 */
+struct smbd_negotiate_req {
+	__le16 min_version;
+	__le16 max_version;
+	__le16 reserved;
+	__le16 credits_requested;
+	__le32 preferred_send_size;
+	__le32 max_receive_size;
+	__le32 max_fragmented_size;
+} __packed;
+
+/* SMBD negotiation response packet [MS-SMBD] 2.2.2 */
+struct smbd_negotiate_resp {
+	__le16 min_version;
+	__le16 max_version;
+	__le16 negotiated_version;
+	__le16 reserved;
+	__le16 credits_requested;
+	__le16 credits_granted;
+	__le32 status;
+	__le32 max_readwrite_size;
+	__le32 preferred_send_size;
+	__le32 max_receive_size;
+	__le32 max_fragmented_size;
+} __packed;
+
+/* SMBD data transfer packet with payload [MS-SMBD] 2.2.3 */
+struct smbd_data_transfer {
+	__le16 credits_requested;
+	__le16 credits_granted;
+	__le16 flags;
+	__le16 reserved;
+	__le32 remaining_data_length;
+	__le32 data_offset;
+	__le32 data_length;
+	__le32 padding;
+	__u8 buffer[];
+} __packed;
+
+/* The packet fields for a registered RDMA buffer */
+struct smbd_buffer_descriptor_v1 {
+	__le64 offset;
+	__le32 token;
+	__le32 length;
+} __packed;
+
+/* Maximum number of SGEs used by smbdirect.c in any send work request */
+#define SMBDIRECT_MAX_SEND_SGE	6
+
+/* The context for a SMBD request */
+struct smbd_request {
+	struct smbd_connection *info;
+	struct ib_cqe cqe;
+
+	/* the SGE entries for this work request */
+	struct ib_sge sge[SMBDIRECT_MAX_SEND_SGE];
+	int num_sge;
+
+	/* SMBD packet header follows this structure */
+	u8 packet[];
+};
+
+/* Maximum number of SGEs used by smbdirect.c in any receive work request */
+#define SMBDIRECT_MAX_RECV_SGE	1
+
+/* The context for a SMBD response */
+struct smbd_response {
+	struct smbd_connection *info;
+	struct ib_cqe cqe;
+	struct ib_sge sge;
+
+	enum smbd_message_type type;
+
+	/* Link to receive queue or reassembly queue */
+	struct list_head list;
+
+	/* Indicate if this is the 1st packet of a payload */
+	bool first_segment;
+
+	/* SMBD packet header and payload follows this structure */
+	u8 packet[];
+};
+
+/* Create a SMBDirect session */
+struct smbd_connection *smbd_get_connection(
+	struct TCP_Server_Info *server, struct sockaddr *dstaddr);
+
+/* Reconnect SMBDirect session */
+int smbd_reconnect(struct TCP_Server_Info *server);
+/* Destroy SMBDirect session */
+void smbd_destroy(struct TCP_Server_Info *server);
+
+/* Interface for carrying upper layer I/O through send/recv */
+int smbd_recv(struct smbd_connection *info, struct msghdr *msg);
+int smbd_send(struct TCP_Server_Info *server,
+	int num_rqst, struct smb_rqst *rqst);
+
+enum mr_state {
+	MR_READY,
+	MR_REGISTERED,
+	MR_INVALIDATED,
+	MR_ERROR
+};
+
+struct smbd_mr {
+	struct smbd_connection	*conn;
+	struct list_head	list;
+	enum mr_state		state;
+	struct ib_mr		*mr;
+	struct sg_table		sgt;
+	enum dma_data_direction	dir;
+	union {
+		struct ib_reg_wr	wr;
+		struct ib_send_wr	inv_wr;
+	};
+	struct ib_cqe		cqe;
+	bool			need_invalidate;
+	struct completion	invalidate_done;
+};
+
+/* Interfaces to register and deregister MR for RDMA read/write */
+struct smbd_mr *smbd_register_mr(
+	struct smbd_connection *info, struct iov_iter *iter,
+	bool writing, bool need_invalidate);
+int smbd_deregister_mr(struct smbd_mr *mr);
+
+#else
+#define cifs_rdma_enabled(server)	0
+struct smbd_connection {};
+static inline void *smbd_get_connection(
+	struct TCP_Server_Info *server, struct sockaddr *dstaddr) {return NULL;}
+static inline int smbd_reconnect(struct TCP_Server_Info *server) {return -1; }
+static inline void smbd_destroy(struct TCP_Server_Info *server) {}
+static inline int smbd_recv(struct smbd_connection *info, struct msghdr *msg) {return -1; }
+static inline int smbd_send(struct TCP_Server_Info *server, int num_rqst, struct smb_rqst *rqst) {return -1; }
+#endif
+
+#endif
diff --git a/fs/smb/client/smbencrypt.c b/fs/smb/client/smbencrypt.c
new file mode 100644
index 0000000000..f0ce26414f
--- /dev/null
+++ b/fs/smb/client/smbencrypt.c
@@ -0,0 +1,91 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+   Unix SMB/Netbios implementation.
+   Version 1.9.
+   SMB parameters and setup
+   Copyright (C) Andrew Tridgell 1992-2000
+   Copyright (C) Luke Kenneth Casson Leighton 1996-2000
+   Modified by Jeremy Allison 1995.
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2002-2003
+   Modified by Steve French (sfrench@us.ibm.com) 2002-2003
+
+*/
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/fips.h>
+#include <linux/fs.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/random.h>
+#include "cifs_fs_sb.h"
+#include "cifs_unicode.h"
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifs_debug.h"
+#include "cifsproto.h"
+#include "../common/md4.h"
+
+#ifndef false
+#define false 0
+#endif
+#ifndef true
+#define true 1
+#endif
+
+/* following came from the other byteorder.h to avoid include conflicts */
+#define CVAL(buf,pos) (((unsigned char *)(buf))[pos])
+#define SSVALX(buf,pos,val) (CVAL(buf,pos)=(val)&0xFF,CVAL(buf,pos+1)=(val)>>8)
+#define SSVAL(buf,pos,val) SSVALX((buf),(pos),((__u16)(val)))
+
+/* produce a md4 message digest from data of length n bytes */
+static int
+mdfour(unsigned char *md4_hash, unsigned char *link_str, int link_len)
+{
+	int rc;
+	struct md4_ctx mctx;
+
+	rc = cifs_md4_init(&mctx);
+	if (rc) {
+		cifs_dbg(VFS, "%s: Could not init MD4\n", __func__);
+		goto mdfour_err;
+	}
+	rc = cifs_md4_update(&mctx, link_str, link_len);
+	if (rc) {
+		cifs_dbg(VFS, "%s: Could not update MD4\n", __func__);
+		goto mdfour_err;
+	}
+	rc = cifs_md4_final(&mctx, md4_hash);
+	if (rc)
+		cifs_dbg(VFS, "%s: Could not finalize MD4\n", __func__);
+
+
+mdfour_err:
+	return rc;
+}
+
+/*
+ * Creates the MD4 Hash of the users password in NT UNICODE.
+ */
+
+int
+E_md4hash(const unsigned char *passwd, unsigned char *p16,
+	const struct nls_table *codepage)
+{
+	int rc;
+	int len;
+	__le16 wpwd[129];
+
+	/* Password cannot be longer than 128 characters */
+	if (passwd) /* Password must be converted to NT unicode */
+		len = cifs_strtoUTF16(wpwd, passwd, 128, codepage);
+	else {
+		len = 0;
+		*wpwd = 0; /* Ensure string is null terminated */
+	}
+
+	rc = mdfour(p16, (unsigned char *) wpwd, len * sizeof(__le16));
+	memzero_explicit(wpwd, sizeof(wpwd));
+
+	return rc;
+}
diff --git a/fs/smb/client/smberr.h b/fs/smb/client/smberr.h
new file mode 100644
index 0000000000..aeffdad829
--- /dev/null
+++ b/fs/smb/client/smberr.h
@@ -0,0 +1,171 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+/*
+ *
+ *   Copyright (c) International Business Machines  Corp., 2002,2004
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   See Error Codes section of the SNIA CIFS Specification
+ *   for more information
+ *
+ */
+
+#define SUCCESS	0x00	/* The request was successful. */
+#define ERRDOS	0x01	/* Error is from the core DOS operating system set */
+#define ERRSRV	0x02	/* Error is generated by the file server daemon */
+#define ERRHRD	0x03	/* Error is a hardware error. */
+#define ERRCMD	0xFF	/* Command was not in the "SMB" format. */
+
+/* The following error codes may be generated with the SUCCESS error class.*/
+
+/*#define SUCCESS	0	The request was successful. */
+
+/* The following error codes may be generated with the ERRDOS error class.*/
+
+#define ERRbadfunc		1	/* Invalid function. The server did not
+					   recognize or could not perform a
+					   system call generated by the server,
+					   e.g., set the DIRECTORY attribute on
+					   a data file, invalid seek mode. */
+#define ERRbadfile		2	/* File not found. The last component
+					   of a file's pathname could not be
+					   found. */
+#define ERRbadpath		3	/* Directory invalid. A directory
+					   component in a pathname could not be
+					   found. */
+#define ERRnofids		4	/* Too many open files. The server has
+					   no file handles available. */
+#define ERRnoaccess		5	/* Access denied, the client's context
+					   does not permit the requested
+					   function. This includes the
+					   following conditions: invalid rename
+					   command, write to Fid open for read
+					   only, read on Fid open for write
+					   only, attempt to delete a non-empty
+					   directory */
+#define ERRbadfid		6	/* Invalid file handle. The file handle
+					   specified was not recognized by the
+					   server. */
+#define ERRbadmcb		7	/* Memory control blocks destroyed. */
+#define ERRnomem		8	/* Insufficient server memory to
+					   perform the requested function. */
+#define ERRbadmem		9	/* Invalid memory block address. */
+#define ERRbadenv		10	/* Invalid environment. */
+#define ERRbadformat		11	/* Invalid format. */
+#define ERRbadaccess		12	/* Invalid open mode. */
+#define ERRbaddata		13	/* Invalid data (generated only by
+					   IOCTL calls within the server). */
+#define ERRbaddrive		15	/* Invalid drive specified. */
+#define ERRremcd		16	/* A Delete Directory request attempted
+					   to remove the server's current
+					   directory. */
+#define ERRdiffdevice		17	/* Not same device (e.g., a cross
+					   volume rename was attempted */
+#define ERRnofiles		18	/* A File Search command can find no
+					   more files matching the specified
+					   criteria. */
+#define ERRwriteprot		19	/* media is write protected */
+#define ERRgeneral		31
+#define ERRbadshare		32	/* The sharing mode specified for an
+					   Open conflicts with existing FIDs on
+					   the file. */
+#define ERRlock			33	/* A Lock request conflicted with an
+					   existing lock or specified an
+					   invalid mode, or an Unlock requested
+					   attempted to remove a lock held by
+					   another process. */
+#define ERRunsup		50
+#define ERRnosuchshare		67
+#define ERRfilexists		80	/* The file named in the request
+					   already exists. */
+#define ERRinvparm		87
+#define ERRdiskfull		112
+#define ERRinvname		123
+#define ERRinvlevel		124
+#define ERRdirnotempty		145
+#define ERRnotlocked		158
+#define ERRcancelviolation	173
+#define ERRalreadyexists	183
+#define ERRbadpipe		230
+#define ERRpipebusy		231
+#define ERRpipeclosing		232
+#define ERRnotconnected		233
+#define ERRmoredata		234
+#define ERReasnotsupported	282
+#define ErrQuota		0x200	/* The operation would cause a quota
+					   limit to be exceeded. */
+#define ErrNotALink		0x201	/* A link operation was performed on a
+					   pathname that was not a link. */
+
+/* Below errors are used internally (do not come over the wire) for passthrough
+   from STATUS codes to POSIX only  */
+#define ERRsymlink              0xFFFD
+#define ErrTooManyLinks         0xFFFE
+
+/* Following error codes may be generated with the ERRSRV error class.*/
+
+#define ERRerror		1	/* Non-specific error code. It is
+					   returned under the following
+					   conditions: resource other than disk
+					   space exhausted (e.g. TIDs), first
+					   SMB command was not negotiate,
+					   multiple negotiates attempted, and
+					   internal server error. */
+#define ERRbadpw		2	/* Bad password - name/password pair in
+					   a TreeConnect or Session Setup are
+					   invalid. */
+#define ERRbadtype		3	/* used for indicating DFS referral
+					   needed */
+#define ERRaccess		4	/* The client does not have the
+					   necessary access rights within the
+					   specified context for requested
+					   function. */
+#define ERRinvtid		5	/* The Tid specified in a command was
+					   invalid. */
+#define ERRinvnetname		6	/* Invalid network name in tree
+					   connect. */
+#define ERRinvdevice		7	/* Invalid device - printer request
+					   made to non-printer connection or
+					   non-printer request made to printer
+					   connection. */
+#define ERRqfull		49	/* Print queue full (files) -- returned
+					   by open print file. */
+#define ERRqtoobig		50	/* Print queue full -- no space. */
+#define ERRqeof			51	/* EOF on print queue dump */
+#define ERRinvpfid		52	/* Invalid print file FID. */
+#define ERRsmbcmd		64	/* The server did not recognize the
+					   command received. */
+#define ERRsrverror		65	/* The server encountered an internal
+					   error, e.g., system file
+					   unavailable. */
+#define ERRbadBID		66	/* (obsolete) */
+#define ERRfilespecs		67	/* The Fid and pathname parameters
+					   contained an invalid combination of
+					   values. */
+#define ERRbadLink		68	/* (obsolete) */
+#define ERRbadpermits		69	/* The access permissions specified for
+					   a file or directory are not a valid
+					   combination. */
+#define ERRbadPID		70
+#define ERRsetattrmode		71	/* attribute (mode) is invalid */
+#define ERRpaused		81	/* Server is paused */
+#define ERRmsgoff		82	/* reserved - messaging off */
+#define ERRnoroom		83	/* reserved - no room for message */
+#define ERRrmuns		87	/* reserved - too many remote names */
+#define ERRtimeout		88	/* operation timed out */
+#define ERRnoresource		89	/* No resources available for request
+					   */
+#define ERRtoomanyuids		90	/* Too many UIDs active on this session
+					   */
+#define ERRbaduid		91	/* The UID is not known as a valid user
+					   */
+#define ERRusempx		250	/* temporarily unable to use raw */
+#define ERRusestd		251	/* temporarily unable to use either raw
+					   or mpx */
+#define ERR_NOTIFY_ENUM_DIR	1024
+#define ERRnoSuchUser		2238	/* user account does not exist */
+#define ERRaccountexpired	2239
+#define ERRbadclient		2240	/* can not logon from this client */
+#define ERRbadLogonTime		2241	/* logon hours do not allow this */
+#define ERRpasswordExpired	2242
+#define ERRnetlogonNotStarted	2455
+#define ERRnosupport		0xFFFF
diff --git a/fs/smb/client/trace.c b/fs/smb/client/trace.c
new file mode 100644
index 0000000000..4654837871
--- /dev/null
+++ b/fs/smb/client/trace.c
@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *   Copyright (C) 2018, Microsoft Corporation.
+ *
+ *   Author(s): Steve French <stfrench@microsoft.com>
+ */
+#define CREATE_TRACE_POINTS
+#include "trace.h"
diff --git a/fs/smb/client/trace.h b/fs/smb/client/trace.h
new file mode 100644
index 0000000000..de199ec9f7
--- /dev/null
+++ b/fs/smb/client/trace.h
@@ -0,0 +1,1092 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ *   Copyright (C) 2018, Microsoft Corporation.
+ *
+ *   Author(s): Steve French <stfrench@microsoft.com>
+ */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM cifs
+
+#if !defined(_CIFS_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _CIFS_TRACE_H
+
+#include <linux/tracepoint.h>
+#include <linux/net.h>
+#include <linux/inet.h>
+
+/*
+ * Please use this 3-part article as a reference for writing new tracepoints:
+ * https://lwn.net/Articles/379903/
+ */
+
+/* For logging errors in read or write */
+DECLARE_EVENT_CLASS(smb3_rw_err_class,
+	TP_PROTO(unsigned int xid,
+		__u64	fid,
+		__u32	tid,
+		__u64	sesid,
+		__u64	offset,
+		__u32	len,
+		int	rc),
+	TP_ARGS(xid, fid, tid, sesid, offset, len, rc),
+	TP_STRUCT__entry(
+		__field(unsigned int, xid)
+		__field(__u64, fid)
+		__field(__u32, tid)
+		__field(__u64, sesid)
+		__field(__u64, offset)
+		__field(__u32, len)
+		__field(int, rc)
+	),
+	TP_fast_assign(
+		__entry->xid = xid;
+		__entry->fid = fid;
+		__entry->tid = tid;
+		__entry->sesid = sesid;
+		__entry->offset = offset;
+		__entry->len = len;
+		__entry->rc = rc;
+	),
+	TP_printk("\txid=%u sid=0x%llx tid=0x%x fid=0x%llx offset=0x%llx len=0x%x rc=%d",
+		__entry->xid, __entry->sesid, __entry->tid, __entry->fid,
+		__entry->offset, __entry->len, __entry->rc)
+)
+
+#define DEFINE_SMB3_RW_ERR_EVENT(name)          \
+DEFINE_EVENT(smb3_rw_err_class, smb3_##name,    \
+	TP_PROTO(unsigned int xid,		\
+		__u64	fid,			\
+		__u32	tid,			\
+		__u64	sesid,			\
+		__u64	offset,			\
+		__u32	len,			\
+		int	rc),			\
+	TP_ARGS(xid, fid, tid, sesid, offset, len, rc))
+
+DEFINE_SMB3_RW_ERR_EVENT(write_err);
+DEFINE_SMB3_RW_ERR_EVENT(read_err);
+DEFINE_SMB3_RW_ERR_EVENT(query_dir_err);
+DEFINE_SMB3_RW_ERR_EVENT(zero_err);
+DEFINE_SMB3_RW_ERR_EVENT(falloc_err);
+
+
+/* For logging successful read or write */
+DECLARE_EVENT_CLASS(smb3_rw_done_class,
+	TP_PROTO(unsigned int xid,
+		__u64	fid,
+		__u32	tid,
+		__u64	sesid,
+		__u64	offset,
+		__u32	len),
+	TP_ARGS(xid, fid, tid, sesid, offset, len),
+	TP_STRUCT__entry(
+		__field(unsigned int, xid)
+		__field(__u64, fid)
+		__field(__u32, tid)
+		__field(__u64, sesid)
+		__field(__u64, offset)
+		__field(__u32, len)
+	),
+	TP_fast_assign(
+		__entry->xid = xid;
+		__entry->fid = fid;
+		__entry->tid = tid;
+		__entry->sesid = sesid;
+		__entry->offset = offset;
+		__entry->len = len;
+	),
+	TP_printk("xid=%u sid=0x%llx tid=0x%x fid=0x%llx offset=0x%llx len=0x%x",
+		__entry->xid, __entry->sesid, __entry->tid, __entry->fid,
+		__entry->offset, __entry->len)
+)
+
+#define DEFINE_SMB3_RW_DONE_EVENT(name)         \
+DEFINE_EVENT(smb3_rw_done_class, smb3_##name,   \
+	TP_PROTO(unsigned int xid,		\
+		__u64	fid,			\
+		__u32	tid,			\
+		__u64	sesid,			\
+		__u64	offset,			\
+		__u32	len),			\
+	TP_ARGS(xid, fid, tid, sesid, offset, len))
+
+DEFINE_SMB3_RW_DONE_EVENT(write_enter);
+DEFINE_SMB3_RW_DONE_EVENT(read_enter);
+DEFINE_SMB3_RW_DONE_EVENT(query_dir_enter);
+DEFINE_SMB3_RW_DONE_EVENT(zero_enter);
+DEFINE_SMB3_RW_DONE_EVENT(falloc_enter);
+DEFINE_SMB3_RW_DONE_EVENT(write_done);
+DEFINE_SMB3_RW_DONE_EVENT(read_done);
+DEFINE_SMB3_RW_DONE_EVENT(query_dir_done);
+DEFINE_SMB3_RW_DONE_EVENT(zero_done);
+DEFINE_SMB3_RW_DONE_EVENT(falloc_done);
+
+/* For logging successful set EOF (truncate) */
+DECLARE_EVENT_CLASS(smb3_eof_class,
+	TP_PROTO(unsigned int xid,
+		__u64	fid,
+		__u32	tid,
+		__u64	sesid,
+		__u64	offset),
+	TP_ARGS(xid, fid, tid, sesid, offset),
+	TP_STRUCT__entry(
+		__field(unsigned int, xid)
+		__field(__u64, fid)
+		__field(__u32, tid)
+		__field(__u64, sesid)
+		__field(__u64, offset)
+	),
+	TP_fast_assign(
+		__entry->xid = xid;
+		__entry->fid = fid;
+		__entry->tid = tid;
+		__entry->sesid = sesid;
+		__entry->offset = offset;
+	),
+	TP_printk("xid=%u sid=0x%llx tid=0x%x fid=0x%llx offset=0x%llx",
+		__entry->xid, __entry->sesid, __entry->tid, __entry->fid,
+		__entry->offset)
+)
+
+#define DEFINE_SMB3_EOF_EVENT(name)         \
+DEFINE_EVENT(smb3_eof_class, smb3_##name,   \
+	TP_PROTO(unsigned int xid,		\
+		__u64	fid,			\
+		__u32	tid,			\
+		__u64	sesid,			\
+		__u64	offset),		\
+	TP_ARGS(xid, fid, tid, sesid, offset))
+
+DEFINE_SMB3_EOF_EVENT(set_eof);
+
+/*
+ * For handle based calls other than read and write, and get/set info
+ */
+DECLARE_EVENT_CLASS(smb3_fd_class,
+	TP_PROTO(unsigned int xid,
+		__u64	fid,
+		__u32	tid,
+		__u64	sesid),
+	TP_ARGS(xid, fid, tid, sesid),
+	TP_STRUCT__entry(
+		__field(unsigned int, xid)
+		__field(__u64, fid)
+		__field(__u32, tid)
+		__field(__u64, sesid)
+	),
+	TP_fast_assign(
+		__entry->xid = xid;
+		__entry->fid = fid;
+		__entry->tid = tid;
+		__entry->sesid = sesid;
+	),
+	TP_printk("\txid=%u sid=0x%llx tid=0x%x fid=0x%llx",
+		__entry->xid, __entry->sesid, __entry->tid, __entry->fid)
+)
+
+#define DEFINE_SMB3_FD_EVENT(name)          \
+DEFINE_EVENT(smb3_fd_class, smb3_##name,    \
+	TP_PROTO(unsigned int xid,		\
+		__u64	fid,			\
+		__u32	tid,			\
+		__u64	sesid),			\
+	TP_ARGS(xid, fid, tid, sesid))
+
+DEFINE_SMB3_FD_EVENT(flush_enter);
+DEFINE_SMB3_FD_EVENT(flush_done);
+DEFINE_SMB3_FD_EVENT(close_enter);
+DEFINE_SMB3_FD_EVENT(close_done);
+DEFINE_SMB3_FD_EVENT(oplock_not_found);
+
+DECLARE_EVENT_CLASS(smb3_fd_err_class,
+	TP_PROTO(unsigned int xid,
+		__u64	fid,
+		__u32	tid,
+		__u64	sesid,
+		int	rc),
+	TP_ARGS(xid, fid, tid, sesid, rc),
+	TP_STRUCT__entry(
+		__field(unsigned int, xid)
+		__field(__u64, fid)
+		__field(__u32, tid)
+		__field(__u64, sesid)
+		__field(int, rc)
+	),
+	TP_fast_assign(
+		__entry->xid = xid;
+		__entry->fid = fid;
+		__entry->tid = tid;
+		__entry->sesid = sesid;
+		__entry->rc = rc;
+	),
+	TP_printk("\txid=%u sid=0x%llx tid=0x%x fid=0x%llx rc=%d",
+		__entry->xid, __entry->sesid, __entry->tid, __entry->fid,
+		__entry->rc)
+)
+
+#define DEFINE_SMB3_FD_ERR_EVENT(name)          \
+DEFINE_EVENT(smb3_fd_err_class, smb3_##name,    \
+	TP_PROTO(unsigned int xid,		\
+		__u64	fid,			\
+		__u32	tid,			\
+		__u64	sesid,			\
+		int	rc),			\
+	TP_ARGS(xid, fid, tid, sesid, rc))
+
+DEFINE_SMB3_FD_ERR_EVENT(flush_err);
+DEFINE_SMB3_FD_ERR_EVENT(lock_err);
+DEFINE_SMB3_FD_ERR_EVENT(close_err);
+
+/*
+ * For handle based query/set info calls
+ */
+DECLARE_EVENT_CLASS(smb3_inf_enter_class,
+	TP_PROTO(unsigned int xid,
+		__u64	fid,
+		__u32	tid,
+		__u64	sesid,
+		__u8	infclass,
+		__u32	type),
+	TP_ARGS(xid, fid, tid, sesid, infclass, type),
+	TP_STRUCT__entry(
+		__field(unsigned int, xid)
+		__field(__u64, fid)
+		__field(__u32, tid)
+		__field(__u64, sesid)
+		__field(__u8, infclass)
+		__field(__u32, type)
+	),
+	TP_fast_assign(
+		__entry->xid = xid;
+		__entry->fid = fid;
+		__entry->tid = tid;
+		__entry->sesid = sesid;
+		__entry->infclass = infclass;
+		__entry->type = type;
+	),
+	TP_printk("xid=%u sid=0x%llx tid=0x%x fid=0x%llx class=%u type=0x%x",
+		__entry->xid, __entry->sesid, __entry->tid, __entry->fid,
+		__entry->infclass, __entry->type)
+)
+
+#define DEFINE_SMB3_INF_ENTER_EVENT(name)          \
+DEFINE_EVENT(smb3_inf_enter_class, smb3_##name,    \
+	TP_PROTO(unsigned int xid,		\
+		__u64	fid,			\
+		__u32	tid,			\
+		__u64	sesid,			\
+		__u8	infclass,		\
+		__u32	type),			\
+	TP_ARGS(xid, fid, tid, sesid, infclass, type))
+
+DEFINE_SMB3_INF_ENTER_EVENT(query_info_enter);
+DEFINE_SMB3_INF_ENTER_EVENT(query_info_done);
+DEFINE_SMB3_INF_ENTER_EVENT(notify_enter);
+DEFINE_SMB3_INF_ENTER_EVENT(notify_done);
+
+DECLARE_EVENT_CLASS(smb3_inf_err_class,
+	TP_PROTO(unsigned int xid,
+		__u64	fid,
+		__u32	tid,
+		__u64	sesid,
+		__u8	infclass,
+		__u32	type,
+		int	rc),
+	TP_ARGS(xid, fid, tid, sesid, infclass, type, rc),
+	TP_STRUCT__entry(
+		__field(unsigned int, xid)
+		__field(__u64, fid)
+		__field(__u32, tid)
+		__field(__u64, sesid)
+		__field(__u8, infclass)
+		__field(__u32, type)
+		__field(int, rc)
+	),
+	TP_fast_assign(
+		__entry->xid = xid;
+		__entry->fid = fid;
+		__entry->tid = tid;
+		__entry->sesid = sesid;
+		__entry->infclass = infclass;
+		__entry->type = type;
+		__entry->rc = rc;
+	),
+	TP_printk("xid=%u sid=0x%llx tid=0x%x fid=0x%llx class=%u type=0x%x rc=%d",
+		__entry->xid, __entry->sesid, __entry->tid, __entry->fid,
+		__entry->infclass, __entry->type, __entry->rc)
+)
+
+#define DEFINE_SMB3_INF_ERR_EVENT(name)          \
+DEFINE_EVENT(smb3_inf_err_class, smb3_##name,    \
+	TP_PROTO(unsigned int xid,		\
+		__u64	fid,			\
+		__u32	tid,			\
+		__u64	sesid,			\
+		__u8	infclass,		\
+		__u32	type,			\
+		int	rc),			\
+	TP_ARGS(xid, fid, tid, sesid, infclass, type, rc))
+
+DEFINE_SMB3_INF_ERR_EVENT(query_info_err);
+DEFINE_SMB3_INF_ERR_EVENT(set_info_err);
+DEFINE_SMB3_INF_ERR_EVENT(notify_err);
+DEFINE_SMB3_INF_ERR_EVENT(fsctl_err);
+
+DECLARE_EVENT_CLASS(smb3_inf_compound_enter_class,
+	TP_PROTO(unsigned int xid,
+		__u32	tid,
+		__u64	sesid,
+		const char *full_path),
+	TP_ARGS(xid, tid, sesid, full_path),
+	TP_STRUCT__entry(
+		__field(unsigned int, xid)
+		__field(__u32, tid)
+		__field(__u64, sesid)
+		__string(path, full_path)
+	),
+	TP_fast_assign(
+		__entry->xid = xid;
+		__entry->tid = tid;
+		__entry->sesid = sesid;
+		__assign_str(path, full_path);
+	),
+	TP_printk("xid=%u sid=0x%llx tid=0x%x path=%s",
+		__entry->xid, __entry->sesid, __entry->tid,
+		__get_str(path))
+)
+
+#define DEFINE_SMB3_INF_COMPOUND_ENTER_EVENT(name)     \
+DEFINE_EVENT(smb3_inf_compound_enter_class, smb3_##name,    \
+	TP_PROTO(unsigned int xid,		\
+		__u32	tid,			\
+		__u64	sesid,			\
+		const char *full_path),		\
+	TP_ARGS(xid, tid, sesid, full_path))
+
+DEFINE_SMB3_INF_COMPOUND_ENTER_EVENT(query_info_compound_enter);
+DEFINE_SMB3_INF_COMPOUND_ENTER_EVENT(posix_query_info_compound_enter);
+DEFINE_SMB3_INF_COMPOUND_ENTER_EVENT(hardlink_enter);
+DEFINE_SMB3_INF_COMPOUND_ENTER_EVENT(rename_enter);
+DEFINE_SMB3_INF_COMPOUND_ENTER_EVENT(rmdir_enter);
+DEFINE_SMB3_INF_COMPOUND_ENTER_EVENT(set_eof_enter);
+DEFINE_SMB3_INF_COMPOUND_ENTER_EVENT(set_info_compound_enter);
+DEFINE_SMB3_INF_COMPOUND_ENTER_EVENT(delete_enter);
+DEFINE_SMB3_INF_COMPOUND_ENTER_EVENT(mkdir_enter);
+DEFINE_SMB3_INF_COMPOUND_ENTER_EVENT(tdis_enter);
+
+
+DECLARE_EVENT_CLASS(smb3_inf_compound_done_class,
+	TP_PROTO(unsigned int xid,
+		__u32	tid,
+		__u64	sesid),
+	TP_ARGS(xid, tid, sesid),
+	TP_STRUCT__entry(
+		__field(unsigned int, xid)
+		__field(__u32, tid)
+		__field(__u64, sesid)
+	),
+	TP_fast_assign(
+		__entry->xid = xid;
+		__entry->tid = tid;
+		__entry->sesid = sesid;
+	),
+	TP_printk("xid=%u sid=0x%llx tid=0x%x",
+		__entry->xid, __entry->sesid, __entry->tid)
+)
+
+#define DEFINE_SMB3_INF_COMPOUND_DONE_EVENT(name)     \
+DEFINE_EVENT(smb3_inf_compound_done_class, smb3_##name,    \
+	TP_PROTO(unsigned int xid,		\
+		__u32	tid,			\
+		__u64	sesid),			\
+	TP_ARGS(xid, tid, sesid))
+
+DEFINE_SMB3_INF_COMPOUND_DONE_EVENT(query_info_compound_done);
+DEFINE_SMB3_INF_COMPOUND_DONE_EVENT(posix_query_info_compound_done);
+DEFINE_SMB3_INF_COMPOUND_DONE_EVENT(hardlink_done);
+DEFINE_SMB3_INF_COMPOUND_DONE_EVENT(rename_done);
+DEFINE_SMB3_INF_COMPOUND_DONE_EVENT(rmdir_done);
+DEFINE_SMB3_INF_COMPOUND_DONE_EVENT(set_eof_done);
+DEFINE_SMB3_INF_COMPOUND_DONE_EVENT(set_info_compound_done);
+DEFINE_SMB3_INF_COMPOUND_DONE_EVENT(delete_done);
+DEFINE_SMB3_INF_COMPOUND_DONE_EVENT(mkdir_done);
+DEFINE_SMB3_INF_COMPOUND_DONE_EVENT(tdis_done);
+
+
+DECLARE_EVENT_CLASS(smb3_inf_compound_err_class,
+	TP_PROTO(unsigned int xid,
+		__u32	tid,
+		__u64	sesid,
+		int	rc),
+	TP_ARGS(xid, tid, sesid, rc),
+	TP_STRUCT__entry(
+		__field(unsigned int, xid)
+		__field(__u32, tid)
+		__field(__u64, sesid)
+		__field(int, rc)
+	),
+	TP_fast_assign(
+		__entry->xid = xid;
+		__entry->tid = tid;
+		__entry->sesid = sesid;
+		__entry->rc = rc;
+	),
+	TP_printk("xid=%u sid=0x%llx tid=0x%x rc=%d",
+		__entry->xid, __entry->sesid, __entry->tid,
+		__entry->rc)
+)
+
+#define DEFINE_SMB3_INF_COMPOUND_ERR_EVENT(name)     \
+DEFINE_EVENT(smb3_inf_compound_err_class, smb3_##name,    \
+	TP_PROTO(unsigned int xid,		\
+		__u32	tid,			\
+		__u64	sesid,			\
+		int rc),			\
+	TP_ARGS(xid, tid, sesid, rc))
+
+DEFINE_SMB3_INF_COMPOUND_ERR_EVENT(query_info_compound_err);
+DEFINE_SMB3_INF_COMPOUND_ERR_EVENT(posix_query_info_compound_err);
+DEFINE_SMB3_INF_COMPOUND_ERR_EVENT(hardlink_err);
+DEFINE_SMB3_INF_COMPOUND_ERR_EVENT(rename_err);
+DEFINE_SMB3_INF_COMPOUND_ERR_EVENT(rmdir_err);
+DEFINE_SMB3_INF_COMPOUND_ERR_EVENT(set_eof_err);
+DEFINE_SMB3_INF_COMPOUND_ERR_EVENT(set_info_compound_err);
+DEFINE_SMB3_INF_COMPOUND_ERR_EVENT(mkdir_err);
+DEFINE_SMB3_INF_COMPOUND_ERR_EVENT(delete_err);
+DEFINE_SMB3_INF_COMPOUND_ERR_EVENT(tdis_err);
+
+/*
+ * For logging SMB3 Status code and Command for responses which return errors
+ */
+DECLARE_EVENT_CLASS(smb3_cmd_err_class,
+	TP_PROTO(__u32	tid,
+		__u64	sesid,
+		__u16	cmd,
+		__u64	mid,
+		__u32	status,
+		int	rc),
+	TP_ARGS(tid, sesid, cmd, mid, status, rc),
+	TP_STRUCT__entry(
+		__field(__u32, tid)
+		__field(__u64, sesid)
+		__field(__u16, cmd)
+		__field(__u64, mid)
+		__field(__u32, status)
+		__field(int, rc)
+	),
+	TP_fast_assign(
+		__entry->tid = tid;
+		__entry->sesid = sesid;
+		__entry->cmd = cmd;
+		__entry->mid = mid;
+		__entry->status = status;
+		__entry->rc = rc;
+	),
+	TP_printk("\tsid=0x%llx tid=0x%x cmd=%u mid=%llu status=0x%x rc=%d",
+		__entry->sesid, __entry->tid, __entry->cmd, __entry->mid,
+		__entry->status, __entry->rc)
+)
+
+#define DEFINE_SMB3_CMD_ERR_EVENT(name)          \
+DEFINE_EVENT(smb3_cmd_err_class, smb3_##name,    \
+	TP_PROTO(__u32	tid,			\
+		__u64	sesid,			\
+		__u16	cmd,			\
+		__u64	mid,			\
+		__u32	status,			\
+		int	rc),			\
+	TP_ARGS(tid, sesid, cmd, mid, status, rc))
+
+DEFINE_SMB3_CMD_ERR_EVENT(cmd_err);
+
+DECLARE_EVENT_CLASS(smb3_cmd_done_class,
+	TP_PROTO(__u32	tid,
+		__u64	sesid,
+		__u16	cmd,
+		__u64	mid),
+	TP_ARGS(tid, sesid, cmd, mid),
+	TP_STRUCT__entry(
+		__field(__u32, tid)
+		__field(__u64, sesid)
+		__field(__u16, cmd)
+		__field(__u64, mid)
+	),
+	TP_fast_assign(
+		__entry->tid = tid;
+		__entry->sesid = sesid;
+		__entry->cmd = cmd;
+		__entry->mid = mid;
+	),
+	TP_printk("\tsid=0x%llx tid=0x%x cmd=%u mid=%llu",
+		__entry->sesid, __entry->tid,
+		__entry->cmd, __entry->mid)
+)
+
+#define DEFINE_SMB3_CMD_DONE_EVENT(name)          \
+DEFINE_EVENT(smb3_cmd_done_class, smb3_##name,    \
+	TP_PROTO(__u32	tid,			\
+		__u64	sesid,			\
+		__u16	cmd,			\
+		__u64	mid),			\
+	TP_ARGS(tid, sesid, cmd, mid))
+
+DEFINE_SMB3_CMD_DONE_EVENT(cmd_enter);
+DEFINE_SMB3_CMD_DONE_EVENT(cmd_done);
+DEFINE_SMB3_CMD_DONE_EVENT(ses_expired);
+
+DECLARE_EVENT_CLASS(smb3_mid_class,
+	TP_PROTO(__u16	cmd,
+		__u64	mid,
+		__u32	pid,
+		unsigned long when_sent,
+		unsigned long when_received),
+	TP_ARGS(cmd, mid, pid, when_sent, when_received),
+	TP_STRUCT__entry(
+		__field(__u16, cmd)
+		__field(__u64, mid)
+		__field(__u32, pid)
+		__field(unsigned long, when_sent)
+		__field(unsigned long, when_received)
+	),
+	TP_fast_assign(
+		__entry->cmd = cmd;
+		__entry->mid = mid;
+		__entry->pid = pid;
+		__entry->when_sent = when_sent;
+		__entry->when_received = when_received;
+	),
+	TP_printk("\tcmd=%u mid=%llu pid=%u, when_sent=%lu when_rcv=%lu",
+		__entry->cmd, __entry->mid, __entry->pid, __entry->when_sent,
+		__entry->when_received)
+)
+
+#define DEFINE_SMB3_MID_EVENT(name)          \
+DEFINE_EVENT(smb3_mid_class, smb3_##name,    \
+	TP_PROTO(__u16	cmd,			\
+		__u64	mid,			\
+		__u32	pid,			\
+		unsigned long when_sent,	\
+		unsigned long when_received),	\
+	TP_ARGS(cmd, mid, pid, when_sent, when_received))
+
+DEFINE_SMB3_MID_EVENT(slow_rsp);
+
+DECLARE_EVENT_CLASS(smb3_exit_err_class,
+	TP_PROTO(unsigned int xid,
+		const char *func_name,
+		int	rc),
+	TP_ARGS(xid, func_name, rc),
+	TP_STRUCT__entry(
+		__field(unsigned int, xid)
+		__string(func_name, func_name)
+		__field(int, rc)
+	),
+	TP_fast_assign(
+		__entry->xid = xid;
+		__assign_str(func_name, func_name);
+		__entry->rc = rc;
+	),
+	TP_printk("\t%s: xid=%u rc=%d",
+		__get_str(func_name), __entry->xid, __entry->rc)
+)
+
+#define DEFINE_SMB3_EXIT_ERR_EVENT(name)          \
+DEFINE_EVENT(smb3_exit_err_class, smb3_##name,    \
+	TP_PROTO(unsigned int xid,		\
+		const char *func_name,		\
+		int	rc),			\
+	TP_ARGS(xid, func_name, rc))
+
+DEFINE_SMB3_EXIT_ERR_EVENT(exit_err);
+
+
+DECLARE_EVENT_CLASS(smb3_sync_err_class,
+	TP_PROTO(unsigned long ino,
+		int	rc),
+	TP_ARGS(ino, rc),
+	TP_STRUCT__entry(
+		__field(unsigned long, ino)
+		__field(int, rc)
+	),
+	TP_fast_assign(
+		__entry->ino = ino;
+		__entry->rc = rc;
+	),
+	TP_printk("\tino=%lu rc=%d",
+		__entry->ino, __entry->rc)
+)
+
+#define DEFINE_SMB3_SYNC_ERR_EVENT(name)          \
+DEFINE_EVENT(smb3_sync_err_class, cifs_##name,    \
+	TP_PROTO(unsigned long ino,		\
+		int	rc),			\
+	TP_ARGS(ino, rc))
+
+DEFINE_SMB3_SYNC_ERR_EVENT(fsync_err);
+DEFINE_SMB3_SYNC_ERR_EVENT(flush_err);
+
+
+DECLARE_EVENT_CLASS(smb3_enter_exit_class,
+	TP_PROTO(unsigned int xid,
+		const char *func_name),
+	TP_ARGS(xid, func_name),
+	TP_STRUCT__entry(
+		__field(unsigned int, xid)
+		__string(func_name, func_name)
+	),
+	TP_fast_assign(
+		__entry->xid = xid;
+		__assign_str(func_name, func_name);
+	),
+	TP_printk("\t%s: xid=%u",
+		__get_str(func_name), __entry->xid)
+)
+
+#define DEFINE_SMB3_ENTER_EXIT_EVENT(name)        \
+DEFINE_EVENT(smb3_enter_exit_class, smb3_##name,  \
+	TP_PROTO(unsigned int xid,		\
+		const char *func_name),		\
+	TP_ARGS(xid, func_name))
+
+DEFINE_SMB3_ENTER_EXIT_EVENT(enter);
+DEFINE_SMB3_ENTER_EXIT_EVENT(exit_done);
+
+/*
+ * For SMB2/SMB3 tree connect
+ */
+
+DECLARE_EVENT_CLASS(smb3_tcon_class,
+	TP_PROTO(unsigned int xid,
+		__u32	tid,
+		__u64	sesid,
+		const char *unc_name,
+		int	rc),
+	TP_ARGS(xid, tid, sesid, unc_name, rc),
+	TP_STRUCT__entry(
+		__field(unsigned int, xid)
+		__field(__u32, tid)
+		__field(__u64, sesid)
+		__string(name, unc_name)
+		__field(int, rc)
+	),
+	TP_fast_assign(
+		__entry->xid = xid;
+		__entry->tid = tid;
+		__entry->sesid = sesid;
+		__assign_str(name, unc_name);
+		__entry->rc = rc;
+	),
+	TP_printk("xid=%u sid=0x%llx tid=0x%x unc_name=%s rc=%d",
+		__entry->xid, __entry->sesid, __entry->tid,
+		__get_str(name), __entry->rc)
+)
+
+#define DEFINE_SMB3_TCON_EVENT(name)          \
+DEFINE_EVENT(smb3_tcon_class, smb3_##name,    \
+	TP_PROTO(unsigned int xid,		\
+		__u32	tid,			\
+		__u64	sesid,			\
+		const char *unc_name,		\
+		int	rc),			\
+	TP_ARGS(xid, tid, sesid, unc_name, rc))
+
+DEFINE_SMB3_TCON_EVENT(tcon);
+DEFINE_SMB3_TCON_EVENT(qfs_done);
+
+/*
+ * For smb2/smb3 open (including create and mkdir) calls
+ */
+
+DECLARE_EVENT_CLASS(smb3_open_enter_class,
+	TP_PROTO(unsigned int xid,
+		__u32	tid,
+		__u64	sesid,
+		const char *full_path,
+		int	create_options,
+		int	desired_access),
+	TP_ARGS(xid, tid, sesid, full_path, create_options, desired_access),
+	TP_STRUCT__entry(
+		__field(unsigned int, xid)
+		__field(__u32, tid)
+		__field(__u64, sesid)
+		__string(path, full_path)
+		__field(int, create_options)
+		__field(int, desired_access)
+	),
+	TP_fast_assign(
+		__entry->xid = xid;
+		__entry->tid = tid;
+		__entry->sesid = sesid;
+		__assign_str(path, full_path);
+		__entry->create_options = create_options;
+		__entry->desired_access = desired_access;
+	),
+	TP_printk("xid=%u sid=0x%llx tid=0x%x path=%s cr_opts=0x%x des_access=0x%x",
+		__entry->xid, __entry->sesid, __entry->tid, __get_str(path),
+		__entry->create_options, __entry->desired_access)
+)
+
+#define DEFINE_SMB3_OPEN_ENTER_EVENT(name)        \
+DEFINE_EVENT(smb3_open_enter_class, smb3_##name,  \
+	TP_PROTO(unsigned int xid,		\
+		__u32	tid,			\
+		__u64	sesid,			\
+		const char *full_path,		\
+		int	create_options,		\
+		int	desired_access),	\
+	TP_ARGS(xid, tid, sesid, full_path, create_options, desired_access))
+
+DEFINE_SMB3_OPEN_ENTER_EVENT(open_enter);
+DEFINE_SMB3_OPEN_ENTER_EVENT(posix_mkdir_enter);
+
+DECLARE_EVENT_CLASS(smb3_open_err_class,
+	TP_PROTO(unsigned int xid,
+		__u32	tid,
+		__u64	sesid,
+		int	create_options,
+		int	desired_access,
+		int	rc),
+	TP_ARGS(xid, tid, sesid, create_options, desired_access, rc),
+	TP_STRUCT__entry(
+		__field(unsigned int, xid)
+		__field(__u32, tid)
+		__field(__u64, sesid)
+		__field(int,   create_options)
+		__field(int, desired_access)
+		__field(int, rc)
+	),
+	TP_fast_assign(
+		__entry->xid = xid;
+		__entry->tid = tid;
+		__entry->sesid = sesid;
+		__entry->create_options = create_options;
+		__entry->desired_access = desired_access;
+		__entry->rc = rc;
+	),
+	TP_printk("xid=%u sid=0x%llx tid=0x%x cr_opts=0x%x des_access=0x%x rc=%d",
+		__entry->xid, __entry->sesid, __entry->tid,
+		__entry->create_options, __entry->desired_access, __entry->rc)
+)
+
+#define DEFINE_SMB3_OPEN_ERR_EVENT(name)          \
+DEFINE_EVENT(smb3_open_err_class, smb3_##name,    \
+	TP_PROTO(unsigned int xid,		\
+		__u32	tid,			\
+		__u64	sesid,			\
+		int	create_options,		\
+		int	desired_access,		\
+		int	rc),			\
+	TP_ARGS(xid, tid, sesid, create_options, desired_access, rc))
+
+DEFINE_SMB3_OPEN_ERR_EVENT(open_err);
+DEFINE_SMB3_OPEN_ERR_EVENT(posix_mkdir_err);
+
+DECLARE_EVENT_CLASS(smb3_open_done_class,
+	TP_PROTO(unsigned int xid,
+		__u64	fid,
+		__u32	tid,
+		__u64	sesid,
+		int	create_options,
+		int	desired_access),
+	TP_ARGS(xid, fid, tid, sesid, create_options, desired_access),
+	TP_STRUCT__entry(
+		__field(unsigned int, xid)
+		__field(__u64, fid)
+		__field(__u32, tid)
+		__field(__u64, sesid)
+		__field(int, create_options)
+		__field(int, desired_access)
+	),
+	TP_fast_assign(
+		__entry->xid = xid;
+		__entry->fid = fid;
+		__entry->tid = tid;
+		__entry->sesid = sesid;
+		__entry->create_options = create_options;
+		__entry->desired_access = desired_access;
+	),
+	TP_printk("xid=%u sid=0x%llx tid=0x%x fid=0x%llx cr_opts=0x%x des_access=0x%x",
+		__entry->xid, __entry->sesid, __entry->tid, __entry->fid,
+		__entry->create_options, __entry->desired_access)
+)
+
+#define DEFINE_SMB3_OPEN_DONE_EVENT(name)        \
+DEFINE_EVENT(smb3_open_done_class, smb3_##name,  \
+	TP_PROTO(unsigned int xid,		\
+		__u64	fid,			\
+		__u32	tid,			\
+		__u64	sesid,			\
+		int	create_options,		\
+		int	desired_access),	\
+	TP_ARGS(xid, fid, tid, sesid, create_options, desired_access))
+
+DEFINE_SMB3_OPEN_DONE_EVENT(open_done);
+DEFINE_SMB3_OPEN_DONE_EVENT(posix_mkdir_done);
+
+
+DECLARE_EVENT_CLASS(smb3_lease_done_class,
+	TP_PROTO(__u32	lease_state,
+		__u32	tid,
+		__u64	sesid,
+		__u64	lease_key_low,
+		__u64	lease_key_high),
+	TP_ARGS(lease_state, tid, sesid, lease_key_low, lease_key_high),
+	TP_STRUCT__entry(
+		__field(__u32, lease_state)
+		__field(__u32, tid)
+		__field(__u64, sesid)
+		__field(__u64, lease_key_low)
+		__field(__u64, lease_key_high)
+	),
+	TP_fast_assign(
+		__entry->lease_state = lease_state;
+		__entry->tid = tid;
+		__entry->sesid = sesid;
+		__entry->lease_key_low = lease_key_low;
+		__entry->lease_key_high = lease_key_high;
+	),
+	TP_printk("sid=0x%llx tid=0x%x lease_key=0x%llx%llx lease_state=0x%x",
+		__entry->sesid, __entry->tid, __entry->lease_key_high,
+		__entry->lease_key_low, __entry->lease_state)
+)
+
+#define DEFINE_SMB3_LEASE_DONE_EVENT(name)        \
+DEFINE_EVENT(smb3_lease_done_class, smb3_##name,  \
+	TP_PROTO(__u32	lease_state,		\
+		__u32	tid,			\
+		__u64	sesid,			\
+		__u64	lease_key_low,		\
+		__u64	lease_key_high),	\
+	TP_ARGS(lease_state, tid, sesid, lease_key_low, lease_key_high))
+
+DEFINE_SMB3_LEASE_DONE_EVENT(lease_done);
+DEFINE_SMB3_LEASE_DONE_EVENT(lease_not_found);
+
+DECLARE_EVENT_CLASS(smb3_lease_err_class,
+	TP_PROTO(__u32	lease_state,
+		__u32	tid,
+		__u64	sesid,
+		__u64	lease_key_low,
+		__u64	lease_key_high,
+		int	rc),
+	TP_ARGS(lease_state, tid, sesid, lease_key_low, lease_key_high, rc),
+	TP_STRUCT__entry(
+		__field(__u32, lease_state)
+		__field(__u32, tid)
+		__field(__u64, sesid)
+		__field(__u64, lease_key_low)
+		__field(__u64, lease_key_high)
+		__field(int, rc)
+	),
+	TP_fast_assign(
+		__entry->lease_state = lease_state;
+		__entry->tid = tid;
+		__entry->sesid = sesid;
+		__entry->lease_key_low = lease_key_low;
+		__entry->lease_key_high = lease_key_high;
+		__entry->rc = rc;
+	),
+	TP_printk("sid=0x%llx tid=0x%x lease_key=0x%llx%llx lease_state=0x%x rc=%d",
+		__entry->sesid, __entry->tid, __entry->lease_key_high,
+		__entry->lease_key_low, __entry->lease_state, __entry->rc)
+)
+
+#define DEFINE_SMB3_LEASE_ERR_EVENT(name)        \
+DEFINE_EVENT(smb3_lease_err_class, smb3_##name,  \
+	TP_PROTO(__u32	lease_state,		\
+		__u32	tid,			\
+		__u64	sesid,			\
+		__u64	lease_key_low,		\
+		__u64	lease_key_high,		\
+		int	rc),			\
+	TP_ARGS(lease_state, tid, sesid, lease_key_low, lease_key_high, rc))
+
+DEFINE_SMB3_LEASE_ERR_EVENT(lease_err);
+
+DECLARE_EVENT_CLASS(smb3_connect_class,
+	TP_PROTO(char *hostname,
+		__u64 conn_id,
+		const struct __kernel_sockaddr_storage *dst_addr),
+	TP_ARGS(hostname, conn_id, dst_addr),
+	TP_STRUCT__entry(
+		__string(hostname, hostname)
+		__field(__u64, conn_id)
+		__array(__u8, dst_addr, sizeof(struct sockaddr_storage))
+	),
+	TP_fast_assign(
+		struct sockaddr_storage *pss = NULL;
+
+		__entry->conn_id = conn_id;
+		pss = (struct sockaddr_storage *)__entry->dst_addr;
+		*pss = *dst_addr;
+		__assign_str(hostname, hostname);
+	),
+	TP_printk("conn_id=0x%llx server=%s addr=%pISpsfc",
+		__entry->conn_id,
+		__get_str(hostname),
+		__entry->dst_addr)
+)
+
+#define DEFINE_SMB3_CONNECT_EVENT(name)        \
+DEFINE_EVENT(smb3_connect_class, smb3_##name,  \
+	TP_PROTO(char *hostname,		\
+		__u64 conn_id,			\
+		const struct __kernel_sockaddr_storage *addr),	\
+	TP_ARGS(hostname, conn_id, addr))
+
+DEFINE_SMB3_CONNECT_EVENT(connect_done);
+DEFINE_SMB3_CONNECT_EVENT(smbd_connect_done);
+DEFINE_SMB3_CONNECT_EVENT(smbd_connect_err);
+
+DECLARE_EVENT_CLASS(smb3_connect_err_class,
+	TP_PROTO(char *hostname, __u64 conn_id,
+		const struct __kernel_sockaddr_storage *dst_addr, int rc),
+	TP_ARGS(hostname, conn_id, dst_addr, rc),
+	TP_STRUCT__entry(
+		__string(hostname, hostname)
+		__field(__u64, conn_id)
+		__array(__u8, dst_addr, sizeof(struct sockaddr_storage))
+		__field(int, rc)
+	),
+	TP_fast_assign(
+		struct sockaddr_storage *pss = NULL;
+
+		__entry->conn_id = conn_id;
+		__entry->rc = rc;
+		pss = (struct sockaddr_storage *)__entry->dst_addr;
+		*pss = *dst_addr;
+		__assign_str(hostname, hostname);
+	),
+	TP_printk("rc=%d conn_id=0x%llx server=%s addr=%pISpsfc",
+		__entry->rc,
+		__entry->conn_id,
+		__get_str(hostname),
+		__entry->dst_addr)
+)
+
+#define DEFINE_SMB3_CONNECT_ERR_EVENT(name)        \
+DEFINE_EVENT(smb3_connect_err_class, smb3_##name,  \
+	TP_PROTO(char *hostname,		\
+		__u64 conn_id,			\
+		const struct __kernel_sockaddr_storage *addr,	\
+		int rc),			\
+	TP_ARGS(hostname, conn_id, addr, rc))
+
+DEFINE_SMB3_CONNECT_ERR_EVENT(connect_err);
+
+DECLARE_EVENT_CLASS(smb3_reconnect_class,
+	TP_PROTO(__u64	currmid,
+		__u64 conn_id,
+		char *hostname),
+	TP_ARGS(currmid, conn_id, hostname),
+	TP_STRUCT__entry(
+		__field(__u64, currmid)
+		__field(__u64, conn_id)
+		__string(hostname, hostname)
+	),
+	TP_fast_assign(
+		__entry->currmid = currmid;
+		__entry->conn_id = conn_id;
+		__assign_str(hostname, hostname);
+	),
+	TP_printk("conn_id=0x%llx server=%s current_mid=%llu",
+		__entry->conn_id,
+		__get_str(hostname),
+		__entry->currmid)
+)
+
+#define DEFINE_SMB3_RECONNECT_EVENT(name)        \
+DEFINE_EVENT(smb3_reconnect_class, smb3_##name,  \
+	TP_PROTO(__u64	currmid,		\
+		__u64 conn_id,			\
+		char *hostname),				\
+	TP_ARGS(currmid, conn_id, hostname))
+
+DEFINE_SMB3_RECONNECT_EVENT(reconnect);
+DEFINE_SMB3_RECONNECT_EVENT(partial_send_reconnect);
+
+DECLARE_EVENT_CLASS(smb3_ses_class,
+	TP_PROTO(__u64	sesid),
+	TP_ARGS(sesid),
+	TP_STRUCT__entry(
+		__field(__u64, sesid)
+	),
+	TP_fast_assign(
+		__entry->sesid = sesid;
+	),
+	TP_printk("sid=0x%llx",
+		__entry->sesid)
+)
+
+#define DEFINE_SMB3_SES_EVENT(name)        \
+DEFINE_EVENT(smb3_ses_class, smb3_##name,  \
+	TP_PROTO(__u64	sesid),				\
+	TP_ARGS(sesid))
+
+DEFINE_SMB3_SES_EVENT(ses_not_found);
+
+DECLARE_EVENT_CLASS(smb3_credit_class,
+	TP_PROTO(__u64	currmid,
+		__u64 conn_id,
+		char *hostname,
+		int credits,
+		int credits_to_add,
+		int in_flight),
+	TP_ARGS(currmid, conn_id, hostname, credits, credits_to_add, in_flight),
+	TP_STRUCT__entry(
+		__field(__u64, currmid)
+		__field(__u64, conn_id)
+		__string(hostname, hostname)
+		__field(int, credits)
+		__field(int, credits_to_add)
+		__field(int, in_flight)
+	),
+	TP_fast_assign(
+		__entry->currmid = currmid;
+		__entry->conn_id = conn_id;
+		__assign_str(hostname, hostname);
+		__entry->credits = credits;
+		__entry->credits_to_add = credits_to_add;
+		__entry->in_flight = in_flight;
+	),
+	TP_printk("conn_id=0x%llx server=%s current_mid=%llu "
+			"credits=%d credit_change=%d in_flight=%d",
+		__entry->conn_id,
+		__get_str(hostname),
+		__entry->currmid,
+		__entry->credits,
+		__entry->credits_to_add,
+		__entry->in_flight)
+)
+
+#define DEFINE_SMB3_CREDIT_EVENT(name)        \
+DEFINE_EVENT(smb3_credit_class, smb3_##name,  \
+	TP_PROTO(__u64	currmid,		\
+		__u64 conn_id,			\
+		char *hostname,			\
+		int  credits,			\
+		int  credits_to_add,	\
+		int in_flight),			\
+	TP_ARGS(currmid, conn_id, hostname, credits, credits_to_add, in_flight))
+
+DEFINE_SMB3_CREDIT_EVENT(reconnect_with_invalid_credits);
+DEFINE_SMB3_CREDIT_EVENT(reconnect_detected);
+DEFINE_SMB3_CREDIT_EVENT(credit_timeout);
+DEFINE_SMB3_CREDIT_EVENT(insufficient_credits);
+DEFINE_SMB3_CREDIT_EVENT(too_many_credits);
+DEFINE_SMB3_CREDIT_EVENT(add_credits);
+DEFINE_SMB3_CREDIT_EVENT(adj_credits);
+DEFINE_SMB3_CREDIT_EVENT(hdr_credits);
+DEFINE_SMB3_CREDIT_EVENT(nblk_credits);
+DEFINE_SMB3_CREDIT_EVENT(pend_credits);
+DEFINE_SMB3_CREDIT_EVENT(wait_credits);
+DEFINE_SMB3_CREDIT_EVENT(waitff_credits);
+DEFINE_SMB3_CREDIT_EVENT(overflow_credits);
+DEFINE_SMB3_CREDIT_EVENT(set_credits);
+
+#endif /* _CIFS_TRACE_H */
+
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+#define TRACE_INCLUDE_FILE trace
+#include <trace/define_trace.h>
diff --git a/fs/smb/client/transport.c b/fs/smb/client/transport.c
new file mode 100644
index 0000000000..4f717ad7c2
--- /dev/null
+++ b/fs/smb/client/transport.c
@@ -0,0 +1,1818 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *
+ *   Copyright (C) International Business Machines  Corp., 2002,2008
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *   Jeremy Allison (jra@samba.org) 2006.
+ *
+ */
+
+#include <linux/fs.h>
+#include <linux/list.h>
+#include <linux/gfp.h>
+#include <linux/wait.h>
+#include <linux/net.h>
+#include <linux/delay.h>
+#include <linux/freezer.h>
+#include <linux/tcp.h>
+#include <linux/bvec.h>
+#include <linux/highmem.h>
+#include <linux/uaccess.h>
+#include <linux/processor.h>
+#include <linux/mempool.h>
+#include <linux/sched/signal.h>
+#include <linux/task_io_accounting_ops.h>
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "smb2proto.h"
+#include "smbdirect.h"
+
+/* Max number of iovectors we can use off the stack when sending requests. */
+#define CIFS_MAX_IOV_SIZE 8
+
+void
+cifs_wake_up_task(struct mid_q_entry *mid)
+{
+	if (mid->mid_state == MID_RESPONSE_RECEIVED)
+		mid->mid_state = MID_RESPONSE_READY;
+	wake_up_process(mid->callback_data);
+}
+
+static struct mid_q_entry *
+alloc_mid(const struct smb_hdr *smb_buffer, struct TCP_Server_Info *server)
+{
+	struct mid_q_entry *temp;
+
+	if (server == NULL) {
+		cifs_dbg(VFS, "%s: null TCP session\n", __func__);
+		return NULL;
+	}
+
+	temp = mempool_alloc(cifs_mid_poolp, GFP_NOFS);
+	memset(temp, 0, sizeof(struct mid_q_entry));
+	kref_init(&temp->refcount);
+	temp->mid = get_mid(smb_buffer);
+	temp->pid = current->pid;
+	temp->command = cpu_to_le16(smb_buffer->Command);
+	cifs_dbg(FYI, "For smb_command %d\n", smb_buffer->Command);
+	/* easier to use jiffies */
+	/* when mid allocated can be before when sent */
+	temp->when_alloc = jiffies;
+	temp->server = server;
+
+	/*
+	 * The default is for the mid to be synchronous, so the
+	 * default callback just wakes up the current task.
+	 */
+	get_task_struct(current);
+	temp->creator = current;
+	temp->callback = cifs_wake_up_task;
+	temp->callback_data = current;
+
+	atomic_inc(&mid_count);
+	temp->mid_state = MID_REQUEST_ALLOCATED;
+	return temp;
+}
+
+void __release_mid(struct kref *refcount)
+{
+	struct mid_q_entry *midEntry =
+			container_of(refcount, struct mid_q_entry, refcount);
+#ifdef CONFIG_CIFS_STATS2
+	__le16 command = midEntry->server->vals->lock_cmd;
+	__u16 smb_cmd = le16_to_cpu(midEntry->command);
+	unsigned long now;
+	unsigned long roundtrip_time;
+#endif
+	struct TCP_Server_Info *server = midEntry->server;
+
+	if (midEntry->resp_buf && (midEntry->mid_flags & MID_WAIT_CANCELLED) &&
+	    (midEntry->mid_state == MID_RESPONSE_RECEIVED ||
+	     midEntry->mid_state == MID_RESPONSE_READY) &&
+	    server->ops->handle_cancelled_mid)
+		server->ops->handle_cancelled_mid(midEntry, server);
+
+	midEntry->mid_state = MID_FREE;
+	atomic_dec(&mid_count);
+	if (midEntry->large_buf)
+		cifs_buf_release(midEntry->resp_buf);
+	else
+		cifs_small_buf_release(midEntry->resp_buf);
+#ifdef CONFIG_CIFS_STATS2
+	now = jiffies;
+	if (now < midEntry->when_alloc)
+		cifs_server_dbg(VFS, "Invalid mid allocation time\n");
+	roundtrip_time = now - midEntry->when_alloc;
+
+	if (smb_cmd < NUMBER_OF_SMB2_COMMANDS) {
+		if (atomic_read(&server->num_cmds[smb_cmd]) == 0) {
+			server->slowest_cmd[smb_cmd] = roundtrip_time;
+			server->fastest_cmd[smb_cmd] = roundtrip_time;
+		} else {
+			if (server->slowest_cmd[smb_cmd] < roundtrip_time)
+				server->slowest_cmd[smb_cmd] = roundtrip_time;
+			else if (server->fastest_cmd[smb_cmd] > roundtrip_time)
+				server->fastest_cmd[smb_cmd] = roundtrip_time;
+		}
+		cifs_stats_inc(&server->num_cmds[smb_cmd]);
+		server->time_per_cmd[smb_cmd] += roundtrip_time;
+	}
+	/*
+	 * commands taking longer than one second (default) can be indications
+	 * that something is wrong, unless it is quite a slow link or a very
+	 * busy server. Note that this calc is unlikely or impossible to wrap
+	 * as long as slow_rsp_threshold is not set way above recommended max
+	 * value (32767 ie 9 hours) and is generally harmless even if wrong
+	 * since only affects debug counters - so leaving the calc as simple
+	 * comparison rather than doing multiple conversions and overflow
+	 * checks
+	 */
+	if ((slow_rsp_threshold != 0) &&
+	    time_after(now, midEntry->when_alloc + (slow_rsp_threshold * HZ)) &&
+	    (midEntry->command != command)) {
+		/*
+		 * smb2slowcmd[NUMBER_OF_SMB2_COMMANDS] counts by command
+		 * NB: le16_to_cpu returns unsigned so can not be negative below
+		 */
+		if (smb_cmd < NUMBER_OF_SMB2_COMMANDS)
+			cifs_stats_inc(&server->smb2slowcmd[smb_cmd]);
+
+		trace_smb3_slow_rsp(smb_cmd, midEntry->mid, midEntry->pid,
+			       midEntry->when_sent, midEntry->when_received);
+		if (cifsFYI & CIFS_TIMER) {
+			pr_debug("slow rsp: cmd %d mid %llu",
+				 midEntry->command, midEntry->mid);
+			cifs_info("A: 0x%lx S: 0x%lx R: 0x%lx\n",
+				  now - midEntry->when_alloc,
+				  now - midEntry->when_sent,
+				  now - midEntry->when_received);
+		}
+	}
+#endif
+	put_task_struct(midEntry->creator);
+
+	mempool_free(midEntry, cifs_mid_poolp);
+}
+
+void
+delete_mid(struct mid_q_entry *mid)
+{
+	spin_lock(&mid->server->mid_lock);
+	if (!(mid->mid_flags & MID_DELETED)) {
+		list_del_init(&mid->qhead);
+		mid->mid_flags |= MID_DELETED;
+	}
+	spin_unlock(&mid->server->mid_lock);
+
+	release_mid(mid);
+}
+
+/*
+ * smb_send_kvec - send an array of kvecs to the server
+ * @server:	Server to send the data to
+ * @smb_msg:	Message to send
+ * @sent:	amount of data sent on socket is stored here
+ *
+ * Our basic "send data to server" function. Should be called with srv_mutex
+ * held. The caller is responsible for handling the results.
+ */
+static int
+smb_send_kvec(struct TCP_Server_Info *server, struct msghdr *smb_msg,
+	      size_t *sent)
+{
+	int rc = 0;
+	int retries = 0;
+	struct socket *ssocket = server->ssocket;
+
+	*sent = 0;
+
+	if (server->noblocksnd)
+		smb_msg->msg_flags = MSG_DONTWAIT + MSG_NOSIGNAL;
+	else
+		smb_msg->msg_flags = MSG_NOSIGNAL;
+
+	while (msg_data_left(smb_msg)) {
+		/*
+		 * If blocking send, we try 3 times, since each can block
+		 * for 5 seconds. For nonblocking  we have to try more
+		 * but wait increasing amounts of time allowing time for
+		 * socket to clear.  The overall time we wait in either
+		 * case to send on the socket is about 15 seconds.
+		 * Similarly we wait for 15 seconds for a response from
+		 * the server in SendReceive[2] for the server to send
+		 * a response back for most types of requests (except
+		 * SMB Write past end of file which can be slow, and
+		 * blocking lock operations). NFS waits slightly longer
+		 * than CIFS, but this can make it take longer for
+		 * nonresponsive servers to be detected and 15 seconds
+		 * is more than enough time for modern networks to
+		 * send a packet.  In most cases if we fail to send
+		 * after the retries we will kill the socket and
+		 * reconnect which may clear the network problem.
+		 */
+		rc = sock_sendmsg(ssocket, smb_msg);
+		if (rc == -EAGAIN) {
+			retries++;
+			if (retries >= 14 ||
+			    (!server->noblocksnd && (retries > 2))) {
+				cifs_server_dbg(VFS, "sends on sock %p stuck for 15 seconds\n",
+					 ssocket);
+				return -EAGAIN;
+			}
+			msleep(1 << retries);
+			continue;
+		}
+
+		if (rc < 0)
+			return rc;
+
+		if (rc == 0) {
+			/* should never happen, letting socket clear before
+			   retrying is our only obvious option here */
+			cifs_server_dbg(VFS, "tcp sent no data\n");
+			msleep(500);
+			continue;
+		}
+
+		/* send was at least partially successful */
+		*sent += rc;
+		retries = 0; /* in case we get ENOSPC on the next send */
+	}
+	return 0;
+}
+
+unsigned long
+smb_rqst_len(struct TCP_Server_Info *server, struct smb_rqst *rqst)
+{
+	unsigned int i;
+	struct kvec *iov;
+	int nvec;
+	unsigned long buflen = 0;
+
+	if (!is_smb1(server) && rqst->rq_nvec >= 2 &&
+	    rqst->rq_iov[0].iov_len == 4) {
+		iov = &rqst->rq_iov[1];
+		nvec = rqst->rq_nvec - 1;
+	} else {
+		iov = rqst->rq_iov;
+		nvec = rqst->rq_nvec;
+	}
+
+	/* total up iov array first */
+	for (i = 0; i < nvec; i++)
+		buflen += iov[i].iov_len;
+
+	buflen += iov_iter_count(&rqst->rq_iter);
+	return buflen;
+}
+
+static int
+__smb_send_rqst(struct TCP_Server_Info *server, int num_rqst,
+		struct smb_rqst *rqst)
+{
+	int rc;
+	struct kvec *iov;
+	int n_vec;
+	unsigned int send_length = 0;
+	unsigned int i, j;
+	sigset_t mask, oldmask;
+	size_t total_len = 0, sent, size;
+	struct socket *ssocket = server->ssocket;
+	struct msghdr smb_msg = {};
+	__be32 rfc1002_marker;
+
+	cifs_in_send_inc(server);
+	if (cifs_rdma_enabled(server)) {
+		/* return -EAGAIN when connecting or reconnecting */
+		rc = -EAGAIN;
+		if (server->smbd_conn)
+			rc = smbd_send(server, num_rqst, rqst);
+		goto smbd_done;
+	}
+
+	rc = -EAGAIN;
+	if (ssocket == NULL)
+		goto out;
+
+	rc = -ERESTARTSYS;
+	if (fatal_signal_pending(current)) {
+		cifs_dbg(FYI, "signal pending before send request\n");
+		goto out;
+	}
+
+	rc = 0;
+	/* cork the socket */
+	tcp_sock_set_cork(ssocket->sk, true);
+
+	for (j = 0; j < num_rqst; j++)
+		send_length += smb_rqst_len(server, &rqst[j]);
+	rfc1002_marker = cpu_to_be32(send_length);
+
+	/*
+	 * We should not allow signals to interrupt the network send because
+	 * any partial send will cause session reconnects thus increasing
+	 * latency of system calls and overload a server with unnecessary
+	 * requests.
+	 */
+
+	sigfillset(&mask);
+	sigprocmask(SIG_BLOCK, &mask, &oldmask);
+
+	/* Generate a rfc1002 marker for SMB2+ */
+	if (!is_smb1(server)) {
+		struct kvec hiov = {
+			.iov_base = &rfc1002_marker,
+			.iov_len  = 4
+		};
+		iov_iter_kvec(&smb_msg.msg_iter, ITER_SOURCE, &hiov, 1, 4);
+		rc = smb_send_kvec(server, &smb_msg, &sent);
+		if (rc < 0)
+			goto unmask;
+
+		total_len += sent;
+		send_length += 4;
+	}
+
+	cifs_dbg(FYI, "Sending smb: smb_len=%u\n", send_length);
+
+	for (j = 0; j < num_rqst; j++) {
+		iov = rqst[j].rq_iov;
+		n_vec = rqst[j].rq_nvec;
+
+		size = 0;
+		for (i = 0; i < n_vec; i++) {
+			dump_smb(iov[i].iov_base, iov[i].iov_len);
+			size += iov[i].iov_len;
+		}
+
+		iov_iter_kvec(&smb_msg.msg_iter, ITER_SOURCE, iov, n_vec, size);
+
+		rc = smb_send_kvec(server, &smb_msg, &sent);
+		if (rc < 0)
+			goto unmask;
+
+		total_len += sent;
+
+		if (iov_iter_count(&rqst[j].rq_iter) > 0) {
+			smb_msg.msg_iter = rqst[j].rq_iter;
+			rc = smb_send_kvec(server, &smb_msg, &sent);
+			if (rc < 0)
+				break;
+			total_len += sent;
+		}
+
+}
+
+unmask:
+	sigprocmask(SIG_SETMASK, &oldmask, NULL);
+
+	/*
+	 * If signal is pending but we have already sent the whole packet to
+	 * the server we need to return success status to allow a corresponding
+	 * mid entry to be kept in the pending requests queue thus allowing
+	 * to handle responses from the server by the client.
+	 *
+	 * If only part of the packet has been sent there is no need to hide
+	 * interrupt because the session will be reconnected anyway, so there
+	 * won't be any response from the server to handle.
+	 */
+
+	if (signal_pending(current) && (total_len != send_length)) {
+		cifs_dbg(FYI, "signal is pending after attempt to send\n");
+		rc = -ERESTARTSYS;
+	}
+
+	/* uncork it */
+	tcp_sock_set_cork(ssocket->sk, false);
+
+	if ((total_len > 0) && (total_len != send_length)) {
+		cifs_dbg(FYI, "partial send (wanted=%u sent=%zu): terminating session\n",
+			 send_length, total_len);
+		/*
+		 * If we have only sent part of an SMB then the next SMB could
+		 * be taken as the remainder of this one. We need to kill the
+		 * socket so the server throws away the partial SMB
+		 */
+		cifs_signal_cifsd_for_reconnect(server, false);
+		trace_smb3_partial_send_reconnect(server->CurrentMid,
+						  server->conn_id, server->hostname);
+	}
+smbd_done:
+	if (rc < 0 && rc != -EINTR)
+		cifs_server_dbg(VFS, "Error %d sending data on socket to server\n",
+			 rc);
+	else if (rc > 0)
+		rc = 0;
+out:
+	cifs_in_send_dec(server);
+	return rc;
+}
+
+struct send_req_vars {
+	struct smb2_transform_hdr tr_hdr;
+	struct smb_rqst rqst[MAX_COMPOUND];
+	struct kvec iov;
+};
+
+static int
+smb_send_rqst(struct TCP_Server_Info *server, int num_rqst,
+	      struct smb_rqst *rqst, int flags)
+{
+	struct send_req_vars *vars;
+	struct smb_rqst *cur_rqst;
+	struct kvec *iov;
+	int rc;
+
+	if (!(flags & CIFS_TRANSFORM_REQ))
+		return __smb_send_rqst(server, num_rqst, rqst);
+
+	if (num_rqst > MAX_COMPOUND - 1)
+		return -ENOMEM;
+
+	if (!server->ops->init_transform_rq) {
+		cifs_server_dbg(VFS, "Encryption requested but transform callback is missing\n");
+		return -EIO;
+	}
+
+	vars = kzalloc(sizeof(*vars), GFP_NOFS);
+	if (!vars)
+		return -ENOMEM;
+	cur_rqst = vars->rqst;
+	iov = &vars->iov;
+
+	iov->iov_base = &vars->tr_hdr;
+	iov->iov_len = sizeof(vars->tr_hdr);
+	cur_rqst[0].rq_iov = iov;
+	cur_rqst[0].rq_nvec = 1;
+
+	rc = server->ops->init_transform_rq(server, num_rqst + 1,
+					    &cur_rqst[0], rqst);
+	if (rc)
+		goto out;
+
+	rc = __smb_send_rqst(server, num_rqst + 1, &cur_rqst[0]);
+	smb3_free_compound_rqst(num_rqst, &cur_rqst[1]);
+out:
+	kfree(vars);
+	return rc;
+}
+
+int
+smb_send(struct TCP_Server_Info *server, struct smb_hdr *smb_buffer,
+	 unsigned int smb_buf_length)
+{
+	struct kvec iov[2];
+	struct smb_rqst rqst = { .rq_iov = iov,
+				 .rq_nvec = 2 };
+
+	iov[0].iov_base = smb_buffer;
+	iov[0].iov_len = 4;
+	iov[1].iov_base = (char *)smb_buffer + 4;
+	iov[1].iov_len = smb_buf_length;
+
+	return __smb_send_rqst(server, 1, &rqst);
+}
+
+static int
+wait_for_free_credits(struct TCP_Server_Info *server, const int num_credits,
+		      const int timeout, const int flags,
+		      unsigned int *instance)
+{
+	long rc;
+	int *credits;
+	int optype;
+	long int t;
+	int scredits, in_flight;
+
+	if (timeout < 0)
+		t = MAX_JIFFY_OFFSET;
+	else
+		t = msecs_to_jiffies(timeout);
+
+	optype = flags & CIFS_OP_MASK;
+
+	*instance = 0;
+
+	credits = server->ops->get_credits_field(server, optype);
+	/* Since an echo is already inflight, no need to wait to send another */
+	if (*credits <= 0 && optype == CIFS_ECHO_OP)
+		return -EAGAIN;
+
+	spin_lock(&server->req_lock);
+	if ((flags & CIFS_TIMEOUT_MASK) == CIFS_NON_BLOCKING) {
+		/* oplock breaks must not be held up */
+		server->in_flight++;
+		if (server->in_flight > server->max_in_flight)
+			server->max_in_flight = server->in_flight;
+		*credits -= 1;
+		*instance = server->reconnect_instance;
+		scredits = *credits;
+		in_flight = server->in_flight;
+		spin_unlock(&server->req_lock);
+
+		trace_smb3_nblk_credits(server->CurrentMid,
+				server->conn_id, server->hostname, scredits, -1, in_flight);
+		cifs_dbg(FYI, "%s: remove %u credits total=%d\n",
+				__func__, 1, scredits);
+
+		return 0;
+	}
+
+	while (1) {
+		spin_unlock(&server->req_lock);
+
+		spin_lock(&server->srv_lock);
+		if (server->tcpStatus == CifsExiting) {
+			spin_unlock(&server->srv_lock);
+			return -ENOENT;
+		}
+		spin_unlock(&server->srv_lock);
+
+		spin_lock(&server->req_lock);
+		if (*credits < num_credits) {
+			scredits = *credits;
+			spin_unlock(&server->req_lock);
+
+			cifs_num_waiters_inc(server);
+			rc = wait_event_killable_timeout(server->request_q,
+				has_credits(server, credits, num_credits), t);
+			cifs_num_waiters_dec(server);
+			if (!rc) {
+				spin_lock(&server->req_lock);
+				scredits = *credits;
+				in_flight = server->in_flight;
+				spin_unlock(&server->req_lock);
+
+				trace_smb3_credit_timeout(server->CurrentMid,
+						server->conn_id, server->hostname, scredits,
+						num_credits, in_flight);
+				cifs_server_dbg(VFS, "wait timed out after %d ms\n",
+						timeout);
+				return -EBUSY;
+			}
+			if (rc == -ERESTARTSYS)
+				return -ERESTARTSYS;
+			spin_lock(&server->req_lock);
+		} else {
+			/*
+			 * For normal commands, reserve the last MAX_COMPOUND
+			 * credits to compound requests.
+			 * Otherwise these compounds could be permanently
+			 * starved for credits by single-credit requests.
+			 *
+			 * To prevent spinning CPU, block this thread until
+			 * there are >MAX_COMPOUND credits available.
+			 * But only do this is we already have a lot of
+			 * credits in flight to avoid triggering this check
+			 * for servers that are slow to hand out credits on
+			 * new sessions.
+			 */
+			if (!optype && num_credits == 1 &&
+			    server->in_flight > 2 * MAX_COMPOUND &&
+			    *credits <= MAX_COMPOUND) {
+				spin_unlock(&server->req_lock);
+
+				cifs_num_waiters_inc(server);
+				rc = wait_event_killable_timeout(
+					server->request_q,
+					has_credits(server, credits,
+						    MAX_COMPOUND + 1),
+					t);
+				cifs_num_waiters_dec(server);
+				if (!rc) {
+					spin_lock(&server->req_lock);
+					scredits = *credits;
+					in_flight = server->in_flight;
+					spin_unlock(&server->req_lock);
+
+					trace_smb3_credit_timeout(
+							server->CurrentMid,
+							server->conn_id, server->hostname,
+							scredits, num_credits, in_flight);
+					cifs_server_dbg(VFS, "wait timed out after %d ms\n",
+							timeout);
+					return -EBUSY;
+				}
+				if (rc == -ERESTARTSYS)
+					return -ERESTARTSYS;
+				spin_lock(&server->req_lock);
+				continue;
+			}
+
+			/*
+			 * Can not count locking commands against total
+			 * as they are allowed to block on server.
+			 */
+
+			/* update # of requests on the wire to server */
+			if ((flags & CIFS_TIMEOUT_MASK) != CIFS_BLOCKING_OP) {
+				*credits -= num_credits;
+				server->in_flight += num_credits;
+				if (server->in_flight > server->max_in_flight)
+					server->max_in_flight = server->in_flight;
+				*instance = server->reconnect_instance;
+			}
+			scredits = *credits;
+			in_flight = server->in_flight;
+			spin_unlock(&server->req_lock);
+
+			trace_smb3_waitff_credits(server->CurrentMid,
+					server->conn_id, server->hostname, scredits,
+					-(num_credits), in_flight);
+			cifs_dbg(FYI, "%s: remove %u credits total=%d\n",
+					__func__, num_credits, scredits);
+			break;
+		}
+	}
+	return 0;
+}
+
+static int
+wait_for_free_request(struct TCP_Server_Info *server, const int flags,
+		      unsigned int *instance)
+{
+	return wait_for_free_credits(server, 1, -1, flags,
+				     instance);
+}
+
+static int
+wait_for_compound_request(struct TCP_Server_Info *server, int num,
+			  const int flags, unsigned int *instance)
+{
+	int *credits;
+	int scredits, in_flight;
+
+	credits = server->ops->get_credits_field(server, flags & CIFS_OP_MASK);
+
+	spin_lock(&server->req_lock);
+	scredits = *credits;
+	in_flight = server->in_flight;
+
+	if (*credits < num) {
+		/*
+		 * If the server is tight on resources or just gives us less
+		 * credits for other reasons (e.g. requests are coming out of
+		 * order and the server delays granting more credits until it
+		 * processes a missing mid) and we exhausted most available
+		 * credits there may be situations when we try to send
+		 * a compound request but we don't have enough credits. At this
+		 * point the client needs to decide if it should wait for
+		 * additional credits or fail the request. If at least one
+		 * request is in flight there is a high probability that the
+		 * server will return enough credits to satisfy this compound
+		 * request.
+		 *
+		 * Return immediately if no requests in flight since we will be
+		 * stuck on waiting for credits.
+		 */
+		if (server->in_flight == 0) {
+			spin_unlock(&server->req_lock);
+			trace_smb3_insufficient_credits(server->CurrentMid,
+					server->conn_id, server->hostname, scredits,
+					num, in_flight);
+			cifs_dbg(FYI, "%s: %d requests in flight, needed %d total=%d\n",
+					__func__, in_flight, num, scredits);
+			return -EDEADLK;
+		}
+	}
+	spin_unlock(&server->req_lock);
+
+	return wait_for_free_credits(server, num, 60000, flags,
+				     instance);
+}
+
+int
+cifs_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
+		      unsigned int *num, struct cifs_credits *credits)
+{
+	*num = size;
+	credits->value = 0;
+	credits->instance = server->reconnect_instance;
+	return 0;
+}
+
+static int allocate_mid(struct cifs_ses *ses, struct smb_hdr *in_buf,
+			struct mid_q_entry **ppmidQ)
+{
+	spin_lock(&ses->ses_lock);
+	if (ses->ses_status == SES_NEW) {
+		if ((in_buf->Command != SMB_COM_SESSION_SETUP_ANDX) &&
+			(in_buf->Command != SMB_COM_NEGOTIATE)) {
+			spin_unlock(&ses->ses_lock);
+			return -EAGAIN;
+		}
+		/* else ok - we are setting up session */
+	}
+
+	if (ses->ses_status == SES_EXITING) {
+		/* check if SMB session is bad because we are setting it up */
+		if (in_buf->Command != SMB_COM_LOGOFF_ANDX) {
+			spin_unlock(&ses->ses_lock);
+			return -EAGAIN;
+		}
+		/* else ok - we are shutting down session */
+	}
+	spin_unlock(&ses->ses_lock);
+
+	*ppmidQ = alloc_mid(in_buf, ses->server);
+	if (*ppmidQ == NULL)
+		return -ENOMEM;
+	spin_lock(&ses->server->mid_lock);
+	list_add_tail(&(*ppmidQ)->qhead, &ses->server->pending_mid_q);
+	spin_unlock(&ses->server->mid_lock);
+	return 0;
+}
+
+static int
+wait_for_response(struct TCP_Server_Info *server, struct mid_q_entry *midQ)
+{
+	int error;
+
+	error = wait_event_state(server->response_q,
+				 midQ->mid_state != MID_REQUEST_SUBMITTED &&
+				 midQ->mid_state != MID_RESPONSE_RECEIVED,
+				 (TASK_KILLABLE|TASK_FREEZABLE_UNSAFE));
+	if (error < 0)
+		return -ERESTARTSYS;
+
+	return 0;
+}
+
+struct mid_q_entry *
+cifs_setup_async_request(struct TCP_Server_Info *server, struct smb_rqst *rqst)
+{
+	int rc;
+	struct smb_hdr *hdr = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
+	struct mid_q_entry *mid;
+
+	if (rqst->rq_iov[0].iov_len != 4 ||
+	    rqst->rq_iov[0].iov_base + 4 != rqst->rq_iov[1].iov_base)
+		return ERR_PTR(-EIO);
+
+	/* enable signing if server requires it */
+	if (server->sign)
+		hdr->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
+
+	mid = alloc_mid(hdr, server);
+	if (mid == NULL)
+		return ERR_PTR(-ENOMEM);
+
+	rc = cifs_sign_rqst(rqst, server, &mid->sequence_number);
+	if (rc) {
+		release_mid(mid);
+		return ERR_PTR(rc);
+	}
+
+	return mid;
+}
+
+/*
+ * Send a SMB request and set the callback function in the mid to handle
+ * the result. Caller is responsible for dealing with timeouts.
+ */
+int
+cifs_call_async(struct TCP_Server_Info *server, struct smb_rqst *rqst,
+		mid_receive_t *receive, mid_callback_t *callback,
+		mid_handle_t *handle, void *cbdata, const int flags,
+		const struct cifs_credits *exist_credits)
+{
+	int rc;
+	struct mid_q_entry *mid;
+	struct cifs_credits credits = { .value = 0, .instance = 0 };
+	unsigned int instance;
+	int optype;
+
+	optype = flags & CIFS_OP_MASK;
+
+	if ((flags & CIFS_HAS_CREDITS) == 0) {
+		rc = wait_for_free_request(server, flags, &instance);
+		if (rc)
+			return rc;
+		credits.value = 1;
+		credits.instance = instance;
+	} else
+		instance = exist_credits->instance;
+
+	cifs_server_lock(server);
+
+	/*
+	 * We can't use credits obtained from the previous session to send this
+	 * request. Check if there were reconnects after we obtained credits and
+	 * return -EAGAIN in such cases to let callers handle it.
+	 */
+	if (instance != server->reconnect_instance) {
+		cifs_server_unlock(server);
+		add_credits_and_wake_if(server, &credits, optype);
+		return -EAGAIN;
+	}
+
+	mid = server->ops->setup_async_request(server, rqst);
+	if (IS_ERR(mid)) {
+		cifs_server_unlock(server);
+		add_credits_and_wake_if(server, &credits, optype);
+		return PTR_ERR(mid);
+	}
+
+	mid->receive = receive;
+	mid->callback = callback;
+	mid->callback_data = cbdata;
+	mid->handle = handle;
+	mid->mid_state = MID_REQUEST_SUBMITTED;
+
+	/* put it on the pending_mid_q */
+	spin_lock(&server->mid_lock);
+	list_add_tail(&mid->qhead, &server->pending_mid_q);
+	spin_unlock(&server->mid_lock);
+
+	/*
+	 * Need to store the time in mid before calling I/O. For call_async,
+	 * I/O response may come back and free the mid entry on another thread.
+	 */
+	cifs_save_when_sent(mid);
+	rc = smb_send_rqst(server, 1, rqst, flags);
+
+	if (rc < 0) {
+		revert_current_mid(server, mid->credits);
+		server->sequence_number -= 2;
+		delete_mid(mid);
+	}
+
+	cifs_server_unlock(server);
+
+	if (rc == 0)
+		return 0;
+
+	add_credits_and_wake_if(server, &credits, optype);
+	return rc;
+}
+
+/*
+ *
+ * Send an SMB Request.  No response info (other than return code)
+ * needs to be parsed.
+ *
+ * flags indicate the type of request buffer and how long to wait
+ * and whether to log NT STATUS code (error) before mapping it to POSIX error
+ *
+ */
+int
+SendReceiveNoRsp(const unsigned int xid, struct cifs_ses *ses,
+		 char *in_buf, int flags)
+{
+	int rc;
+	struct kvec iov[1];
+	struct kvec rsp_iov;
+	int resp_buf_type;
+
+	iov[0].iov_base = in_buf;
+	iov[0].iov_len = get_rfc1002_length(in_buf) + 4;
+	flags |= CIFS_NO_RSP_BUF;
+	rc = SendReceive2(xid, ses, iov, 1, &resp_buf_type, flags, &rsp_iov);
+	cifs_dbg(NOISY, "SendRcvNoRsp flags %d rc %d\n", flags, rc);
+
+	return rc;
+}
+
+static int
+cifs_sync_mid_result(struct mid_q_entry *mid, struct TCP_Server_Info *server)
+{
+	int rc = 0;
+
+	cifs_dbg(FYI, "%s: cmd=%d mid=%llu state=%d\n",
+		 __func__, le16_to_cpu(mid->command), mid->mid, mid->mid_state);
+
+	spin_lock(&server->mid_lock);
+	switch (mid->mid_state) {
+	case MID_RESPONSE_READY:
+		spin_unlock(&server->mid_lock);
+		return rc;
+	case MID_RETRY_NEEDED:
+		rc = -EAGAIN;
+		break;
+	case MID_RESPONSE_MALFORMED:
+		rc = -EIO;
+		break;
+	case MID_SHUTDOWN:
+		rc = -EHOSTDOWN;
+		break;
+	default:
+		if (!(mid->mid_flags & MID_DELETED)) {
+			list_del_init(&mid->qhead);
+			mid->mid_flags |= MID_DELETED;
+		}
+		cifs_server_dbg(VFS, "%s: invalid mid state mid=%llu state=%d\n",
+			 __func__, mid->mid, mid->mid_state);
+		rc = -EIO;
+	}
+	spin_unlock(&server->mid_lock);
+
+	release_mid(mid);
+	return rc;
+}
+
+static inline int
+send_cancel(struct TCP_Server_Info *server, struct smb_rqst *rqst,
+	    struct mid_q_entry *mid)
+{
+	return server->ops->send_cancel ?
+				server->ops->send_cancel(server, rqst, mid) : 0;
+}
+
+int
+cifs_check_receive(struct mid_q_entry *mid, struct TCP_Server_Info *server,
+		   bool log_error)
+{
+	unsigned int len = get_rfc1002_length(mid->resp_buf) + 4;
+
+	dump_smb(mid->resp_buf, min_t(u32, 92, len));
+
+	/* convert the length into a more usable form */
+	if (server->sign) {
+		struct kvec iov[2];
+		int rc = 0;
+		struct smb_rqst rqst = { .rq_iov = iov,
+					 .rq_nvec = 2 };
+
+		iov[0].iov_base = mid->resp_buf;
+		iov[0].iov_len = 4;
+		iov[1].iov_base = (char *)mid->resp_buf + 4;
+		iov[1].iov_len = len - 4;
+		/* FIXME: add code to kill session */
+		rc = cifs_verify_signature(&rqst, server,
+					   mid->sequence_number);
+		if (rc)
+			cifs_server_dbg(VFS, "SMB signature verification returned error = %d\n",
+				 rc);
+	}
+
+	/* BB special case reconnect tid and uid here? */
+	return map_and_check_smb_error(mid, log_error);
+}
+
+struct mid_q_entry *
+cifs_setup_request(struct cifs_ses *ses, struct TCP_Server_Info *ignored,
+		   struct smb_rqst *rqst)
+{
+	int rc;
+	struct smb_hdr *hdr = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
+	struct mid_q_entry *mid;
+
+	if (rqst->rq_iov[0].iov_len != 4 ||
+	    rqst->rq_iov[0].iov_base + 4 != rqst->rq_iov[1].iov_base)
+		return ERR_PTR(-EIO);
+
+	rc = allocate_mid(ses, hdr, &mid);
+	if (rc)
+		return ERR_PTR(rc);
+	rc = cifs_sign_rqst(rqst, ses->server, &mid->sequence_number);
+	if (rc) {
+		delete_mid(mid);
+		return ERR_PTR(rc);
+	}
+	return mid;
+}
+
+static void
+cifs_compound_callback(struct mid_q_entry *mid)
+{
+	struct TCP_Server_Info *server = mid->server;
+	struct cifs_credits credits;
+
+	credits.value = server->ops->get_credits(mid);
+	credits.instance = server->reconnect_instance;
+
+	add_credits(server, &credits, mid->optype);
+
+	if (mid->mid_state == MID_RESPONSE_RECEIVED)
+		mid->mid_state = MID_RESPONSE_READY;
+}
+
+static void
+cifs_compound_last_callback(struct mid_q_entry *mid)
+{
+	cifs_compound_callback(mid);
+	cifs_wake_up_task(mid);
+}
+
+static void
+cifs_cancelled_callback(struct mid_q_entry *mid)
+{
+	cifs_compound_callback(mid);
+	release_mid(mid);
+}
+
+/*
+ * Return a channel (master if none) of @ses that can be used to send
+ * regular requests.
+ *
+ * If we are currently binding a new channel (negprot/sess.setup),
+ * return the new incomplete channel.
+ */
+struct TCP_Server_Info *cifs_pick_channel(struct cifs_ses *ses)
+{
+	uint index = 0;
+	unsigned int min_in_flight = UINT_MAX, max_in_flight = 0;
+	struct TCP_Server_Info *server = NULL;
+	int i;
+
+	if (!ses)
+		return NULL;
+
+	spin_lock(&ses->chan_lock);
+	for (i = 0; i < ses->chan_count; i++) {
+		server = ses->chans[i].server;
+		if (!server || server->terminate)
+			continue;
+
+		/*
+		 * strictly speaking, we should pick up req_lock to read
+		 * server->in_flight. But it shouldn't matter much here if we
+		 * race while reading this data. The worst that can happen is
+		 * that we could use a channel that's not least loaded. Avoiding
+		 * taking the lock could help reduce wait time, which is
+		 * important for this function
+		 */
+		if (server->in_flight < min_in_flight) {
+			min_in_flight = server->in_flight;
+			index = i;
+		}
+		if (server->in_flight > max_in_flight)
+			max_in_flight = server->in_flight;
+	}
+
+	/* if all channels are equally loaded, fall back to round-robin */
+	if (min_in_flight == max_in_flight) {
+		index = (uint)atomic_inc_return(&ses->chan_seq);
+		index %= ses->chan_count;
+	}
+	spin_unlock(&ses->chan_lock);
+
+	return ses->chans[index].server;
+}
+
+int
+compound_send_recv(const unsigned int xid, struct cifs_ses *ses,
+		   struct TCP_Server_Info *server,
+		   const int flags, const int num_rqst, struct smb_rqst *rqst,
+		   int *resp_buf_type, struct kvec *resp_iov)
+{
+	int i, j, optype, rc = 0;
+	struct mid_q_entry *midQ[MAX_COMPOUND];
+	bool cancelled_mid[MAX_COMPOUND] = {false};
+	struct cifs_credits credits[MAX_COMPOUND] = {
+		{ .value = 0, .instance = 0 }
+	};
+	unsigned int instance;
+	char *buf;
+
+	optype = flags & CIFS_OP_MASK;
+
+	for (i = 0; i < num_rqst; i++)
+		resp_buf_type[i] = CIFS_NO_BUFFER;  /* no response buf yet */
+
+	if (!ses || !ses->server || !server) {
+		cifs_dbg(VFS, "Null session\n");
+		return -EIO;
+	}
+
+	spin_lock(&server->srv_lock);
+	if (server->tcpStatus == CifsExiting) {
+		spin_unlock(&server->srv_lock);
+		return -ENOENT;
+	}
+	spin_unlock(&server->srv_lock);
+
+	/*
+	 * Wait for all the requests to become available.
+	 * This approach still leaves the possibility to be stuck waiting for
+	 * credits if the server doesn't grant credits to the outstanding
+	 * requests and if the client is completely idle, not generating any
+	 * other requests.
+	 * This can be handled by the eventual session reconnect.
+	 */
+	rc = wait_for_compound_request(server, num_rqst, flags,
+				       &instance);
+	if (rc)
+		return rc;
+
+	for (i = 0; i < num_rqst; i++) {
+		credits[i].value = 1;
+		credits[i].instance = instance;
+	}
+
+	/*
+	 * Make sure that we sign in the same order that we send on this socket
+	 * and avoid races inside tcp sendmsg code that could cause corruption
+	 * of smb data.
+	 */
+
+	cifs_server_lock(server);
+
+	/*
+	 * All the parts of the compound chain belong obtained credits from the
+	 * same session. We can not use credits obtained from the previous
+	 * session to send this request. Check if there were reconnects after
+	 * we obtained credits and return -EAGAIN in such cases to let callers
+	 * handle it.
+	 */
+	if (instance != server->reconnect_instance) {
+		cifs_server_unlock(server);
+		for (j = 0; j < num_rqst; j++)
+			add_credits(server, &credits[j], optype);
+		return -EAGAIN;
+	}
+
+	for (i = 0; i < num_rqst; i++) {
+		midQ[i] = server->ops->setup_request(ses, server, &rqst[i]);
+		if (IS_ERR(midQ[i])) {
+			revert_current_mid(server, i);
+			for (j = 0; j < i; j++)
+				delete_mid(midQ[j]);
+			cifs_server_unlock(server);
+
+			/* Update # of requests on wire to server */
+			for (j = 0; j < num_rqst; j++)
+				add_credits(server, &credits[j], optype);
+			return PTR_ERR(midQ[i]);
+		}
+
+		midQ[i]->mid_state = MID_REQUEST_SUBMITTED;
+		midQ[i]->optype = optype;
+		/*
+		 * Invoke callback for every part of the compound chain
+		 * to calculate credits properly. Wake up this thread only when
+		 * the last element is received.
+		 */
+		if (i < num_rqst - 1)
+			midQ[i]->callback = cifs_compound_callback;
+		else
+			midQ[i]->callback = cifs_compound_last_callback;
+	}
+	rc = smb_send_rqst(server, num_rqst, rqst, flags);
+
+	for (i = 0; i < num_rqst; i++)
+		cifs_save_when_sent(midQ[i]);
+
+	if (rc < 0) {
+		revert_current_mid(server, num_rqst);
+		server->sequence_number -= 2;
+	}
+
+	cifs_server_unlock(server);
+
+	/*
+	 * If sending failed for some reason or it is an oplock break that we
+	 * will not receive a response to - return credits back
+	 */
+	if (rc < 0 || (flags & CIFS_NO_SRV_RSP)) {
+		for (i = 0; i < num_rqst; i++)
+			add_credits(server, &credits[i], optype);
+		goto out;
+	}
+
+	/*
+	 * At this point the request is passed to the network stack - we assume
+	 * that any credits taken from the server structure on the client have
+	 * been spent and we can't return them back. Once we receive responses
+	 * we will collect credits granted by the server in the mid callbacks
+	 * and add those credits to the server structure.
+	 */
+
+	/*
+	 * Compounding is never used during session establish.
+	 */
+	spin_lock(&ses->ses_lock);
+	if ((ses->ses_status == SES_NEW) || (optype & CIFS_NEG_OP) || (optype & CIFS_SESS_OP)) {
+		spin_unlock(&ses->ses_lock);
+
+		cifs_server_lock(server);
+		smb311_update_preauth_hash(ses, server, rqst[0].rq_iov, rqst[0].rq_nvec);
+		cifs_server_unlock(server);
+
+		spin_lock(&ses->ses_lock);
+	}
+	spin_unlock(&ses->ses_lock);
+
+	for (i = 0; i < num_rqst; i++) {
+		rc = wait_for_response(server, midQ[i]);
+		if (rc != 0)
+			break;
+	}
+	if (rc != 0) {
+		for (; i < num_rqst; i++) {
+			cifs_server_dbg(FYI, "Cancelling wait for mid %llu cmd: %d\n",
+				 midQ[i]->mid, le16_to_cpu(midQ[i]->command));
+			send_cancel(server, &rqst[i], midQ[i]);
+			spin_lock(&server->mid_lock);
+			midQ[i]->mid_flags |= MID_WAIT_CANCELLED;
+			if (midQ[i]->mid_state == MID_REQUEST_SUBMITTED ||
+			    midQ[i]->mid_state == MID_RESPONSE_RECEIVED) {
+				midQ[i]->callback = cifs_cancelled_callback;
+				cancelled_mid[i] = true;
+				credits[i].value = 0;
+			}
+			spin_unlock(&server->mid_lock);
+		}
+	}
+
+	for (i = 0; i < num_rqst; i++) {
+		if (rc < 0)
+			goto out;
+
+		rc = cifs_sync_mid_result(midQ[i], server);
+		if (rc != 0) {
+			/* mark this mid as cancelled to not free it below */
+			cancelled_mid[i] = true;
+			goto out;
+		}
+
+		if (!midQ[i]->resp_buf ||
+		    midQ[i]->mid_state != MID_RESPONSE_READY) {
+			rc = -EIO;
+			cifs_dbg(FYI, "Bad MID state?\n");
+			goto out;
+		}
+
+		buf = (char *)midQ[i]->resp_buf;
+		resp_iov[i].iov_base = buf;
+		resp_iov[i].iov_len = midQ[i]->resp_buf_size +
+			HEADER_PREAMBLE_SIZE(server);
+
+		if (midQ[i]->large_buf)
+			resp_buf_type[i] = CIFS_LARGE_BUFFER;
+		else
+			resp_buf_type[i] = CIFS_SMALL_BUFFER;
+
+		rc = server->ops->check_receive(midQ[i], server,
+						     flags & CIFS_LOG_ERROR);
+
+		/* mark it so buf will not be freed by delete_mid */
+		if ((flags & CIFS_NO_RSP_BUF) == 0)
+			midQ[i]->resp_buf = NULL;
+
+	}
+
+	/*
+	 * Compounding is never used during session establish.
+	 */
+	spin_lock(&ses->ses_lock);
+	if ((ses->ses_status == SES_NEW) || (optype & CIFS_NEG_OP) || (optype & CIFS_SESS_OP)) {
+		struct kvec iov = {
+			.iov_base = resp_iov[0].iov_base,
+			.iov_len = resp_iov[0].iov_len
+		};
+		spin_unlock(&ses->ses_lock);
+		cifs_server_lock(server);
+		smb311_update_preauth_hash(ses, server, &iov, 1);
+		cifs_server_unlock(server);
+		spin_lock(&ses->ses_lock);
+	}
+	spin_unlock(&ses->ses_lock);
+
+out:
+	/*
+	 * This will dequeue all mids. After this it is important that the
+	 * demultiplex_thread will not process any of these mids any futher.
+	 * This is prevented above by using a noop callback that will not
+	 * wake this thread except for the very last PDU.
+	 */
+	for (i = 0; i < num_rqst; i++) {
+		if (!cancelled_mid[i])
+			delete_mid(midQ[i]);
+	}
+
+	return rc;
+}
+
+int
+cifs_send_recv(const unsigned int xid, struct cifs_ses *ses,
+	       struct TCP_Server_Info *server,
+	       struct smb_rqst *rqst, int *resp_buf_type, const int flags,
+	       struct kvec *resp_iov)
+{
+	return compound_send_recv(xid, ses, server, flags, 1,
+				  rqst, resp_buf_type, resp_iov);
+}
+
+int
+SendReceive2(const unsigned int xid, struct cifs_ses *ses,
+	     struct kvec *iov, int n_vec, int *resp_buf_type /* ret */,
+	     const int flags, struct kvec *resp_iov)
+{
+	struct smb_rqst rqst;
+	struct kvec s_iov[CIFS_MAX_IOV_SIZE], *new_iov;
+	int rc;
+
+	if (n_vec + 1 > CIFS_MAX_IOV_SIZE) {
+		new_iov = kmalloc_array(n_vec + 1, sizeof(struct kvec),
+					GFP_KERNEL);
+		if (!new_iov) {
+			/* otherwise cifs_send_recv below sets resp_buf_type */
+			*resp_buf_type = CIFS_NO_BUFFER;
+			return -ENOMEM;
+		}
+	} else
+		new_iov = s_iov;
+
+	/* 1st iov is a RFC1001 length followed by the rest of the packet */
+	memcpy(new_iov + 1, iov, (sizeof(struct kvec) * n_vec));
+
+	new_iov[0].iov_base = new_iov[1].iov_base;
+	new_iov[0].iov_len = 4;
+	new_iov[1].iov_base += 4;
+	new_iov[1].iov_len -= 4;
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	rqst.rq_iov = new_iov;
+	rqst.rq_nvec = n_vec + 1;
+
+	rc = cifs_send_recv(xid, ses, ses->server,
+			    &rqst, resp_buf_type, flags, resp_iov);
+	if (n_vec + 1 > CIFS_MAX_IOV_SIZE)
+		kfree(new_iov);
+	return rc;
+}
+
+int
+SendReceive(const unsigned int xid, struct cifs_ses *ses,
+	    struct smb_hdr *in_buf, struct smb_hdr *out_buf,
+	    int *pbytes_returned, const int flags)
+{
+	int rc = 0;
+	struct mid_q_entry *midQ;
+	unsigned int len = be32_to_cpu(in_buf->smb_buf_length);
+	struct kvec iov = { .iov_base = in_buf, .iov_len = len };
+	struct smb_rqst rqst = { .rq_iov = &iov, .rq_nvec = 1 };
+	struct cifs_credits credits = { .value = 1, .instance = 0 };
+	struct TCP_Server_Info *server;
+
+	if (ses == NULL) {
+		cifs_dbg(VFS, "Null smb session\n");
+		return -EIO;
+	}
+	server = ses->server;
+	if (server == NULL) {
+		cifs_dbg(VFS, "Null tcp session\n");
+		return -EIO;
+	}
+
+	spin_lock(&server->srv_lock);
+	if (server->tcpStatus == CifsExiting) {
+		spin_unlock(&server->srv_lock);
+		return -ENOENT;
+	}
+	spin_unlock(&server->srv_lock);
+
+	/* Ensure that we do not send more than 50 overlapping requests
+	   to the same server. We may make this configurable later or
+	   use ses->maxReq */
+
+	if (len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
+		cifs_server_dbg(VFS, "Invalid length, greater than maximum frame, %d\n",
+				len);
+		return -EIO;
+	}
+
+	rc = wait_for_free_request(server, flags, &credits.instance);
+	if (rc)
+		return rc;
+
+	/* make sure that we sign in the same order that we send on this socket
+	   and avoid races inside tcp sendmsg code that could cause corruption
+	   of smb data */
+
+	cifs_server_lock(server);
+
+	rc = allocate_mid(ses, in_buf, &midQ);
+	if (rc) {
+		cifs_server_unlock(server);
+		/* Update # of requests on wire to server */
+		add_credits(server, &credits, 0);
+		return rc;
+	}
+
+	rc = cifs_sign_smb(in_buf, server, &midQ->sequence_number);
+	if (rc) {
+		cifs_server_unlock(server);
+		goto out;
+	}
+
+	midQ->mid_state = MID_REQUEST_SUBMITTED;
+
+	rc = smb_send(server, in_buf, len);
+	cifs_save_when_sent(midQ);
+
+	if (rc < 0)
+		server->sequence_number -= 2;
+
+	cifs_server_unlock(server);
+
+	if (rc < 0)
+		goto out;
+
+	rc = wait_for_response(server, midQ);
+	if (rc != 0) {
+		send_cancel(server, &rqst, midQ);
+		spin_lock(&server->mid_lock);
+		if (midQ->mid_state == MID_REQUEST_SUBMITTED ||
+		    midQ->mid_state == MID_RESPONSE_RECEIVED) {
+			/* no longer considered to be "in-flight" */
+			midQ->callback = release_mid;
+			spin_unlock(&server->mid_lock);
+			add_credits(server, &credits, 0);
+			return rc;
+		}
+		spin_unlock(&server->mid_lock);
+	}
+
+	rc = cifs_sync_mid_result(midQ, server);
+	if (rc != 0) {
+		add_credits(server, &credits, 0);
+		return rc;
+	}
+
+	if (!midQ->resp_buf || !out_buf ||
+	    midQ->mid_state != MID_RESPONSE_READY) {
+		rc = -EIO;
+		cifs_server_dbg(VFS, "Bad MID state?\n");
+		goto out;
+	}
+
+	*pbytes_returned = get_rfc1002_length(midQ->resp_buf);
+	memcpy(out_buf, midQ->resp_buf, *pbytes_returned + 4);
+	rc = cifs_check_receive(midQ, server, 0);
+out:
+	delete_mid(midQ);
+	add_credits(server, &credits, 0);
+
+	return rc;
+}
+
+/* We send a LOCKINGX_CANCEL_LOCK to cause the Windows
+   blocking lock to return. */
+
+static int
+send_lock_cancel(const unsigned int xid, struct cifs_tcon *tcon,
+			struct smb_hdr *in_buf,
+			struct smb_hdr *out_buf)
+{
+	int bytes_returned;
+	struct cifs_ses *ses = tcon->ses;
+	LOCK_REQ *pSMB = (LOCK_REQ *)in_buf;
+
+	/* We just modify the current in_buf to change
+	   the type of lock from LOCKING_ANDX_SHARED_LOCK
+	   or LOCKING_ANDX_EXCLUSIVE_LOCK to
+	   LOCKING_ANDX_CANCEL_LOCK. */
+
+	pSMB->LockType = LOCKING_ANDX_CANCEL_LOCK|LOCKING_ANDX_LARGE_FILES;
+	pSMB->Timeout = 0;
+	pSMB->hdr.Mid = get_next_mid(ses->server);
+
+	return SendReceive(xid, ses, in_buf, out_buf,
+			&bytes_returned, 0);
+}
+
+int
+SendReceiveBlockingLock(const unsigned int xid, struct cifs_tcon *tcon,
+	    struct smb_hdr *in_buf, struct smb_hdr *out_buf,
+	    int *pbytes_returned)
+{
+	int rc = 0;
+	int rstart = 0;
+	struct mid_q_entry *midQ;
+	struct cifs_ses *ses;
+	unsigned int len = be32_to_cpu(in_buf->smb_buf_length);
+	struct kvec iov = { .iov_base = in_buf, .iov_len = len };
+	struct smb_rqst rqst = { .rq_iov = &iov, .rq_nvec = 1 };
+	unsigned int instance;
+	struct TCP_Server_Info *server;
+
+	if (tcon == NULL || tcon->ses == NULL) {
+		cifs_dbg(VFS, "Null smb session\n");
+		return -EIO;
+	}
+	ses = tcon->ses;
+	server = ses->server;
+
+	if (server == NULL) {
+		cifs_dbg(VFS, "Null tcp session\n");
+		return -EIO;
+	}
+
+	spin_lock(&server->srv_lock);
+	if (server->tcpStatus == CifsExiting) {
+		spin_unlock(&server->srv_lock);
+		return -ENOENT;
+	}
+	spin_unlock(&server->srv_lock);
+
+	/* Ensure that we do not send more than 50 overlapping requests
+	   to the same server. We may make this configurable later or
+	   use ses->maxReq */
+
+	if (len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
+		cifs_tcon_dbg(VFS, "Invalid length, greater than maximum frame, %d\n",
+			      len);
+		return -EIO;
+	}
+
+	rc = wait_for_free_request(server, CIFS_BLOCKING_OP, &instance);
+	if (rc)
+		return rc;
+
+	/* make sure that we sign in the same order that we send on this socket
+	   and avoid races inside tcp sendmsg code that could cause corruption
+	   of smb data */
+
+	cifs_server_lock(server);
+
+	rc = allocate_mid(ses, in_buf, &midQ);
+	if (rc) {
+		cifs_server_unlock(server);
+		return rc;
+	}
+
+	rc = cifs_sign_smb(in_buf, server, &midQ->sequence_number);
+	if (rc) {
+		delete_mid(midQ);
+		cifs_server_unlock(server);
+		return rc;
+	}
+
+	midQ->mid_state = MID_REQUEST_SUBMITTED;
+	rc = smb_send(server, in_buf, len);
+	cifs_save_when_sent(midQ);
+
+	if (rc < 0)
+		server->sequence_number -= 2;
+
+	cifs_server_unlock(server);
+
+	if (rc < 0) {
+		delete_mid(midQ);
+		return rc;
+	}
+
+	/* Wait for a reply - allow signals to interrupt. */
+	rc = wait_event_interruptible(server->response_q,
+		(!(midQ->mid_state == MID_REQUEST_SUBMITTED ||
+		   midQ->mid_state == MID_RESPONSE_RECEIVED)) ||
+		((server->tcpStatus != CifsGood) &&
+		 (server->tcpStatus != CifsNew)));
+
+	/* Were we interrupted by a signal ? */
+	spin_lock(&server->srv_lock);
+	if ((rc == -ERESTARTSYS) &&
+		(midQ->mid_state == MID_REQUEST_SUBMITTED ||
+		 midQ->mid_state == MID_RESPONSE_RECEIVED) &&
+		((server->tcpStatus == CifsGood) ||
+		 (server->tcpStatus == CifsNew))) {
+		spin_unlock(&server->srv_lock);
+
+		if (in_buf->Command == SMB_COM_TRANSACTION2) {
+			/* POSIX lock. We send a NT_CANCEL SMB to cause the
+			   blocking lock to return. */
+			rc = send_cancel(server, &rqst, midQ);
+			if (rc) {
+				delete_mid(midQ);
+				return rc;
+			}
+		} else {
+			/* Windows lock. We send a LOCKINGX_CANCEL_LOCK
+			   to cause the blocking lock to return. */
+
+			rc = send_lock_cancel(xid, tcon, in_buf, out_buf);
+
+			/* If we get -ENOLCK back the lock may have
+			   already been removed. Don't exit in this case. */
+			if (rc && rc != -ENOLCK) {
+				delete_mid(midQ);
+				return rc;
+			}
+		}
+
+		rc = wait_for_response(server, midQ);
+		if (rc) {
+			send_cancel(server, &rqst, midQ);
+			spin_lock(&server->mid_lock);
+			if (midQ->mid_state == MID_REQUEST_SUBMITTED ||
+			    midQ->mid_state == MID_RESPONSE_RECEIVED) {
+				/* no longer considered to be "in-flight" */
+				midQ->callback = release_mid;
+				spin_unlock(&server->mid_lock);
+				return rc;
+			}
+			spin_unlock(&server->mid_lock);
+		}
+
+		/* We got the response - restart system call. */
+		rstart = 1;
+		spin_lock(&server->srv_lock);
+	}
+	spin_unlock(&server->srv_lock);
+
+	rc = cifs_sync_mid_result(midQ, server);
+	if (rc != 0)
+		return rc;
+
+	/* rcvd frame is ok */
+	if (out_buf == NULL || midQ->mid_state != MID_RESPONSE_READY) {
+		rc = -EIO;
+		cifs_tcon_dbg(VFS, "Bad MID state?\n");
+		goto out;
+	}
+
+	*pbytes_returned = get_rfc1002_length(midQ->resp_buf);
+	memcpy(out_buf, midQ->resp_buf, *pbytes_returned + 4);
+	rc = cifs_check_receive(midQ, server, 0);
+out:
+	delete_mid(midQ);
+	if (rstart && rc == -EACCES)
+		return -ERESTARTSYS;
+	return rc;
+}
+
+/*
+ * Discard any remaining data in the current SMB. To do this, we borrow the
+ * current bigbuf.
+ */
+int
+cifs_discard_remaining_data(struct TCP_Server_Info *server)
+{
+	unsigned int rfclen = server->pdu_size;
+	size_t remaining = rfclen + HEADER_PREAMBLE_SIZE(server) -
+		server->total_read;
+
+	while (remaining > 0) {
+		ssize_t length;
+
+		length = cifs_discard_from_socket(server,
+				min_t(size_t, remaining,
+				      CIFSMaxBufSize + MAX_HEADER_SIZE(server)));
+		if (length < 0)
+			return length;
+		server->total_read += length;
+		remaining -= length;
+	}
+
+	return 0;
+}
+
+static int
+__cifs_readv_discard(struct TCP_Server_Info *server, struct mid_q_entry *mid,
+		     bool malformed)
+{
+	int length;
+
+	length = cifs_discard_remaining_data(server);
+	dequeue_mid(mid, malformed);
+	mid->resp_buf = server->smallbuf;
+	server->smallbuf = NULL;
+	return length;
+}
+
+static int
+cifs_readv_discard(struct TCP_Server_Info *server, struct mid_q_entry *mid)
+{
+	struct cifs_readdata *rdata = mid->callback_data;
+
+	return  __cifs_readv_discard(server, mid, rdata->result);
+}
+
+int
+cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid)
+{
+	int length, len;
+	unsigned int data_offset, data_len;
+	struct cifs_readdata *rdata = mid->callback_data;
+	char *buf = server->smallbuf;
+	unsigned int buflen = server->pdu_size + HEADER_PREAMBLE_SIZE(server);
+	bool use_rdma_mr = false;
+
+	cifs_dbg(FYI, "%s: mid=%llu offset=%llu bytes=%u\n",
+		 __func__, mid->mid, rdata->offset, rdata->bytes);
+
+	/*
+	 * read the rest of READ_RSP header (sans Data array), or whatever we
+	 * can if there's not enough data. At this point, we've read down to
+	 * the Mid.
+	 */
+	len = min_t(unsigned int, buflen, server->vals->read_rsp_size) -
+							HEADER_SIZE(server) + 1;
+
+	length = cifs_read_from_socket(server,
+				       buf + HEADER_SIZE(server) - 1, len);
+	if (length < 0)
+		return length;
+	server->total_read += length;
+
+	if (server->ops->is_session_expired &&
+	    server->ops->is_session_expired(buf)) {
+		cifs_reconnect(server, true);
+		return -1;
+	}
+
+	if (server->ops->is_status_pending &&
+	    server->ops->is_status_pending(buf, server)) {
+		cifs_discard_remaining_data(server);
+		return -1;
+	}
+
+	/* set up first two iov for signature check and to get credits */
+	rdata->iov[0].iov_base = buf;
+	rdata->iov[0].iov_len = HEADER_PREAMBLE_SIZE(server);
+	rdata->iov[1].iov_base = buf + HEADER_PREAMBLE_SIZE(server);
+	rdata->iov[1].iov_len =
+		server->total_read - HEADER_PREAMBLE_SIZE(server);
+	cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
+		 rdata->iov[0].iov_base, rdata->iov[0].iov_len);
+	cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
+		 rdata->iov[1].iov_base, rdata->iov[1].iov_len);
+
+	/* Was the SMB read successful? */
+	rdata->result = server->ops->map_error(buf, false);
+	if (rdata->result != 0) {
+		cifs_dbg(FYI, "%s: server returned error %d\n",
+			 __func__, rdata->result);
+		/* normal error on read response */
+		return __cifs_readv_discard(server, mid, false);
+	}
+
+	/* Is there enough to get to the rest of the READ_RSP header? */
+	if (server->total_read < server->vals->read_rsp_size) {
+		cifs_dbg(FYI, "%s: server returned short header. got=%u expected=%zu\n",
+			 __func__, server->total_read,
+			 server->vals->read_rsp_size);
+		rdata->result = -EIO;
+		return cifs_readv_discard(server, mid);
+	}
+
+	data_offset = server->ops->read_data_offset(buf) +
+		HEADER_PREAMBLE_SIZE(server);
+	if (data_offset < server->total_read) {
+		/*
+		 * win2k8 sometimes sends an offset of 0 when the read
+		 * is beyond the EOF. Treat it as if the data starts just after
+		 * the header.
+		 */
+		cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
+			 __func__, data_offset);
+		data_offset = server->total_read;
+	} else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
+		/* data_offset is beyond the end of smallbuf */
+		cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
+			 __func__, data_offset);
+		rdata->result = -EIO;
+		return cifs_readv_discard(server, mid);
+	}
+
+	cifs_dbg(FYI, "%s: total_read=%u data_offset=%u\n",
+		 __func__, server->total_read, data_offset);
+
+	len = data_offset - server->total_read;
+	if (len > 0) {
+		/* read any junk before data into the rest of smallbuf */
+		length = cifs_read_from_socket(server,
+					       buf + server->total_read, len);
+		if (length < 0)
+			return length;
+		server->total_read += length;
+	}
+
+	/* how much data is in the response? */
+#ifdef CONFIG_CIFS_SMB_DIRECT
+	use_rdma_mr = rdata->mr;
+#endif
+	data_len = server->ops->read_data_length(buf, use_rdma_mr);
+	if (!use_rdma_mr && (data_offset + data_len > buflen)) {
+		/* data_len is corrupt -- discard frame */
+		rdata->result = -EIO;
+		return cifs_readv_discard(server, mid);
+	}
+
+#ifdef CONFIG_CIFS_SMB_DIRECT
+	if (rdata->mr)
+		length = data_len; /* An RDMA read is already done. */
+	else
+#endif
+		length = cifs_read_iter_from_socket(server, &rdata->iter,
+						    data_len);
+	if (length > 0)
+		rdata->got_bytes += length;
+	server->total_read += length;
+
+	cifs_dbg(FYI, "total_read=%u buflen=%u remaining=%u\n",
+		 server->total_read, buflen, data_len);
+
+	/* discard anything left over */
+	if (server->total_read < buflen)
+		return cifs_readv_discard(server, mid);
+
+	dequeue_mid(mid, false);
+	mid->resp_buf = server->smallbuf;
+	server->smallbuf = NULL;
+	return length;
+}
diff --git a/fs/smb/client/unc.c b/fs/smb/client/unc.c
new file mode 100644
index 0000000000..f6fc5e343e
--- /dev/null
+++ b/fs/smb/client/unc.c
@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *   Copyright (C) 2020, Microsoft Corporation.
+ *
+ *   Author(s): Steve French <stfrench@microsoft.com>
+ *              Suresh Jayaraman <sjayaraman@suse.de>
+ *              Jeff Layton <jlayton@kernel.org>
+ */
+
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include <linux/inet.h>
+#include <linux/ctype.h>
+#include "cifsglob.h"
+#include "cifsproto.h"
+
+/* extract the host portion of the UNC string */
+char *extract_hostname(const char *unc)
+{
+	const char *src;
+	char *dst, *delim;
+	unsigned int len;
+
+	/* skip double chars at beginning of string */
+	/* BB: check validity of these bytes? */
+	if (strlen(unc) < 3)
+		return ERR_PTR(-EINVAL);
+	for (src = unc; *src && *src == '\\'; src++)
+		;
+	if (!*src)
+		return ERR_PTR(-EINVAL);
+
+	/* delimiter between hostname and sharename is always '\\' now */
+	delim = strchr(src, '\\');
+	if (!delim)
+		return ERR_PTR(-EINVAL);
+
+	len = delim - src;
+	dst = kmalloc((len + 1), GFP_KERNEL);
+	if (dst == NULL)
+		return ERR_PTR(-ENOMEM);
+
+	memcpy(dst, src, len);
+	dst[len] = '\0';
+
+	return dst;
+}
+
+char *extract_sharename(const char *unc)
+{
+	const char *src;
+	char *delim, *dst;
+
+	/* skip double chars at the beginning */
+	src = unc + 2;
+
+	/* share name is always preceded by '\\' now */
+	delim = strchr(src, '\\');
+	if (!delim)
+		return ERR_PTR(-EINVAL);
+	delim++;
+
+	/* caller has to free the memory */
+	dst = kstrdup(delim, GFP_KERNEL);
+	if (!dst)
+		return ERR_PTR(-ENOMEM);
+
+	return dst;
+}
diff --git a/fs/smb/client/winucase.c b/fs/smb/client/winucase.c
new file mode 100644
index 0000000000..2f075b5b50
--- /dev/null
+++ b/fs/smb/client/winucase.c
@@ -0,0 +1,649 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *
+ * Copyright (c) Jeffrey Layton <jlayton@redhat.com>, 2013
+ *
+ * The const tables in this file were converted from the following info
+ * provided by Microsoft:
+ *
+ * 3.1.5.3 Mapping UTF-16 Strings to Upper Case:
+ *
+ * https://msdn.microsoft.com/en-us/library/hh877830.aspx
+ * http://www.microsoft.com/en-us/download/details.aspx?displaylang=en&id=10921
+ *
+ * In particular, the table in "Windows 8 Upper Case Mapping Table.txt" was
+ * post-processed using the winucase_convert.pl script.
+ */
+
+#include <linux/nls.h>
+
+wchar_t cifs_toupper(wchar_t in);  /* quiet sparse */
+
+static const wchar_t t2_00[256] = {
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
+	0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
+	0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
+	0x0058, 0x0059, 0x005a, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7,
+	0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf,
+	0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x0000,
+	0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x0178,
+};
+
+static const wchar_t t2_01[256] = {
+	0x0000, 0x0100, 0x0000, 0x0102, 0x0000, 0x0104, 0x0000, 0x0106,
+	0x0000, 0x0108, 0x0000, 0x010a, 0x0000, 0x010c, 0x0000, 0x010e,
+	0x0000, 0x0110, 0x0000, 0x0112, 0x0000, 0x0114, 0x0000, 0x0116,
+	0x0000, 0x0118, 0x0000, 0x011a, 0x0000, 0x011c, 0x0000, 0x011e,
+	0x0000, 0x0120, 0x0000, 0x0122, 0x0000, 0x0124, 0x0000, 0x0126,
+	0x0000, 0x0128, 0x0000, 0x012a, 0x0000, 0x012c, 0x0000, 0x012e,
+	0x0000, 0x0000, 0x0000, 0x0132, 0x0000, 0x0134, 0x0000, 0x0136,
+	0x0000, 0x0000, 0x0139, 0x0000, 0x013b, 0x0000, 0x013d, 0x0000,
+	0x013f, 0x0000, 0x0141, 0x0000, 0x0143, 0x0000, 0x0145, 0x0000,
+	0x0147, 0x0000, 0x0000, 0x014a, 0x0000, 0x014c, 0x0000, 0x014e,
+	0x0000, 0x0150, 0x0000, 0x0152, 0x0000, 0x0154, 0x0000, 0x0156,
+	0x0000, 0x0158, 0x0000, 0x015a, 0x0000, 0x015c, 0x0000, 0x015e,
+	0x0000, 0x0160, 0x0000, 0x0162, 0x0000, 0x0164, 0x0000, 0x0166,
+	0x0000, 0x0168, 0x0000, 0x016a, 0x0000, 0x016c, 0x0000, 0x016e,
+	0x0000, 0x0170, 0x0000, 0x0172, 0x0000, 0x0174, 0x0000, 0x0176,
+	0x0000, 0x0000, 0x0179, 0x0000, 0x017b, 0x0000, 0x017d, 0x0000,
+	0x0243, 0x0000, 0x0000, 0x0182, 0x0000, 0x0184, 0x0000, 0x0000,
+	0x0187, 0x0000, 0x0000, 0x0000, 0x018b, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0191, 0x0000, 0x0000, 0x01f6, 0x0000, 0x0000,
+	0x0000, 0x0198, 0x023d, 0x0000, 0x0000, 0x0000, 0x0220, 0x0000,
+	0x0000, 0x01a0, 0x0000, 0x01a2, 0x0000, 0x01a4, 0x0000, 0x0000,
+	0x01a7, 0x0000, 0x0000, 0x0000, 0x0000, 0x01ac, 0x0000, 0x0000,
+	0x01af, 0x0000, 0x0000, 0x0000, 0x01b3, 0x0000, 0x01b5, 0x0000,
+	0x0000, 0x01b8, 0x0000, 0x0000, 0x0000, 0x01bc, 0x0000, 0x01f7,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x01c4, 0x0000,
+	0x0000, 0x01c7, 0x0000, 0x0000, 0x01ca, 0x0000, 0x01cd, 0x0000,
+	0x01cf, 0x0000, 0x01d1, 0x0000, 0x01d3, 0x0000, 0x01d5, 0x0000,
+	0x01d7, 0x0000, 0x01d9, 0x0000, 0x01db, 0x018e, 0x0000, 0x01de,
+	0x0000, 0x01e0, 0x0000, 0x01e2, 0x0000, 0x01e4, 0x0000, 0x01e6,
+	0x0000, 0x01e8, 0x0000, 0x01ea, 0x0000, 0x01ec, 0x0000, 0x01ee,
+	0x0000, 0x0000, 0x0000, 0x01f1, 0x0000, 0x01f4, 0x0000, 0x0000,
+	0x0000, 0x01f8, 0x0000, 0x01fa, 0x0000, 0x01fc, 0x0000, 0x01fe,
+};
+
+static const wchar_t t2_02[256] = {
+	0x0000, 0x0200, 0x0000, 0x0202, 0x0000, 0x0204, 0x0000, 0x0206,
+	0x0000, 0x0208, 0x0000, 0x020a, 0x0000, 0x020c, 0x0000, 0x020e,
+	0x0000, 0x0210, 0x0000, 0x0212, 0x0000, 0x0214, 0x0000, 0x0216,
+	0x0000, 0x0218, 0x0000, 0x021a, 0x0000, 0x021c, 0x0000, 0x021e,
+	0x0000, 0x0000, 0x0000, 0x0222, 0x0000, 0x0224, 0x0000, 0x0226,
+	0x0000, 0x0228, 0x0000, 0x022a, 0x0000, 0x022c, 0x0000, 0x022e,
+	0x0000, 0x0230, 0x0000, 0x0232, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x023b, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0241, 0x0000, 0x0000, 0x0000, 0x0000, 0x0246,
+	0x0000, 0x0248, 0x0000, 0x024a, 0x0000, 0x024c, 0x0000, 0x024e,
+	0x2c6f, 0x2c6d, 0x0000, 0x0181, 0x0186, 0x0000, 0x0189, 0x018a,
+	0x0000, 0x018f, 0x0000, 0x0190, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0193, 0x0000, 0x0000, 0x0194, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0197, 0x0196, 0x0000, 0x2c62, 0x0000, 0x0000, 0x0000, 0x019c,
+	0x0000, 0x2c6e, 0x019d, 0x0000, 0x0000, 0x019f, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x2c64, 0x0000, 0x0000,
+	0x01a6, 0x0000, 0x0000, 0x01a9, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x01ae, 0x0244, 0x01b1, 0x01b2, 0x0245, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x01b7, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+};
+
+static const wchar_t t2_03[256] = {
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0370, 0x0000, 0x0372, 0x0000, 0x0000, 0x0000, 0x0376,
+	0x0000, 0x0000, 0x0000, 0x03fd, 0x03fe, 0x03ff, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0386, 0x0388, 0x0389, 0x038a,
+	0x0000, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396, 0x0397,
+	0x0398, 0x0399, 0x039a, 0x039b, 0x039c, 0x039d, 0x039e, 0x039f,
+	0x03a0, 0x03a1, 0x0000, 0x03a3, 0x03a4, 0x03a5, 0x03a6, 0x03a7,
+	0x03a8, 0x03a9, 0x03aa, 0x03ab, 0x038c, 0x038e, 0x038f, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x03cf,
+	0x0000, 0x03d8, 0x0000, 0x03da, 0x0000, 0x03dc, 0x0000, 0x03de,
+	0x0000, 0x03e0, 0x0000, 0x03e2, 0x0000, 0x03e4, 0x0000, 0x03e6,
+	0x0000, 0x03e8, 0x0000, 0x03ea, 0x0000, 0x03ec, 0x0000, 0x03ee,
+	0x0000, 0x0000, 0x03f9, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x03f7, 0x0000, 0x0000, 0x03fa, 0x0000, 0x0000, 0x0000, 0x0000,
+};
+
+static const wchar_t t2_04[256] = {
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0410, 0x0411, 0x0412, 0x0413, 0x0414, 0x0415, 0x0416, 0x0417,
+	0x0418, 0x0419, 0x041a, 0x041b, 0x041c, 0x041d, 0x041e, 0x041f,
+	0x0420, 0x0421, 0x0422, 0x0423, 0x0424, 0x0425, 0x0426, 0x0427,
+	0x0428, 0x0429, 0x042a, 0x042b, 0x042c, 0x042d, 0x042e, 0x042f,
+	0x0400, 0x0401, 0x0402, 0x0403, 0x0404, 0x0405, 0x0406, 0x0407,
+	0x0408, 0x0409, 0x040a, 0x040b, 0x040c, 0x040d, 0x040e, 0x040f,
+	0x0000, 0x0460, 0x0000, 0x0462, 0x0000, 0x0464, 0x0000, 0x0466,
+	0x0000, 0x0468, 0x0000, 0x046a, 0x0000, 0x046c, 0x0000, 0x046e,
+	0x0000, 0x0470, 0x0000, 0x0472, 0x0000, 0x0474, 0x0000, 0x0476,
+	0x0000, 0x0478, 0x0000, 0x047a, 0x0000, 0x047c, 0x0000, 0x047e,
+	0x0000, 0x0480, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x048a, 0x0000, 0x048c, 0x0000, 0x048e,
+	0x0000, 0x0490, 0x0000, 0x0492, 0x0000, 0x0494, 0x0000, 0x0496,
+	0x0000, 0x0498, 0x0000, 0x049a, 0x0000, 0x049c, 0x0000, 0x049e,
+	0x0000, 0x04a0, 0x0000, 0x04a2, 0x0000, 0x04a4, 0x0000, 0x04a6,
+	0x0000, 0x04a8, 0x0000, 0x04aa, 0x0000, 0x04ac, 0x0000, 0x04ae,
+	0x0000, 0x04b0, 0x0000, 0x04b2, 0x0000, 0x04b4, 0x0000, 0x04b6,
+	0x0000, 0x04b8, 0x0000, 0x04ba, 0x0000, 0x04bc, 0x0000, 0x04be,
+	0x0000, 0x0000, 0x04c1, 0x0000, 0x04c3, 0x0000, 0x04c5, 0x0000,
+	0x04c7, 0x0000, 0x04c9, 0x0000, 0x04cb, 0x0000, 0x04cd, 0x04c0,
+	0x0000, 0x04d0, 0x0000, 0x04d2, 0x0000, 0x04d4, 0x0000, 0x04d6,
+	0x0000, 0x04d8, 0x0000, 0x04da, 0x0000, 0x04dc, 0x0000, 0x04de,
+	0x0000, 0x04e0, 0x0000, 0x04e2, 0x0000, 0x04e4, 0x0000, 0x04e6,
+	0x0000, 0x04e8, 0x0000, 0x04ea, 0x0000, 0x04ec, 0x0000, 0x04ee,
+	0x0000, 0x04f0, 0x0000, 0x04f2, 0x0000, 0x04f4, 0x0000, 0x04f6,
+	0x0000, 0x04f8, 0x0000, 0x04fa, 0x0000, 0x04fc, 0x0000, 0x04fe,
+};
+
+static const wchar_t t2_05[256] = {
+	0x0000, 0x0500, 0x0000, 0x0502, 0x0000, 0x0504, 0x0000, 0x0506,
+	0x0000, 0x0508, 0x0000, 0x050a, 0x0000, 0x050c, 0x0000, 0x050e,
+	0x0000, 0x0510, 0x0000, 0x0512, 0x0000, 0x0514, 0x0000, 0x0516,
+	0x0000, 0x0518, 0x0000, 0x051a, 0x0000, 0x051c, 0x0000, 0x051e,
+	0x0000, 0x0520, 0x0000, 0x0522, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0531, 0x0532, 0x0533, 0x0534, 0x0535, 0x0536, 0x0537,
+	0x0538, 0x0539, 0x053a, 0x053b, 0x053c, 0x053d, 0x053e, 0x053f,
+	0x0540, 0x0541, 0x0542, 0x0543, 0x0544, 0x0545, 0x0546, 0x0547,
+	0x0548, 0x0549, 0x054a, 0x054b, 0x054c, 0x054d, 0x054e, 0x054f,
+	0x0550, 0x0551, 0x0552, 0x0553, 0x0554, 0x0555, 0x0556, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+};
+
+static const wchar_t t2_1d[256] = {
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0xa77d, 0x0000, 0x0000, 0x0000, 0x2c63, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+};
+
+static const wchar_t t2_1e[256] = {
+	0x0000, 0x1e00, 0x0000, 0x1e02, 0x0000, 0x1e04, 0x0000, 0x1e06,
+	0x0000, 0x1e08, 0x0000, 0x1e0a, 0x0000, 0x1e0c, 0x0000, 0x1e0e,
+	0x0000, 0x1e10, 0x0000, 0x1e12, 0x0000, 0x1e14, 0x0000, 0x1e16,
+	0x0000, 0x1e18, 0x0000, 0x1e1a, 0x0000, 0x1e1c, 0x0000, 0x1e1e,
+	0x0000, 0x1e20, 0x0000, 0x1e22, 0x0000, 0x1e24, 0x0000, 0x1e26,
+	0x0000, 0x1e28, 0x0000, 0x1e2a, 0x0000, 0x1e2c, 0x0000, 0x1e2e,
+	0x0000, 0x1e30, 0x0000, 0x1e32, 0x0000, 0x1e34, 0x0000, 0x1e36,
+	0x0000, 0x1e38, 0x0000, 0x1e3a, 0x0000, 0x1e3c, 0x0000, 0x1e3e,
+	0x0000, 0x1e40, 0x0000, 0x1e42, 0x0000, 0x1e44, 0x0000, 0x1e46,
+	0x0000, 0x1e48, 0x0000, 0x1e4a, 0x0000, 0x1e4c, 0x0000, 0x1e4e,
+	0x0000, 0x1e50, 0x0000, 0x1e52, 0x0000, 0x1e54, 0x0000, 0x1e56,
+	0x0000, 0x1e58, 0x0000, 0x1e5a, 0x0000, 0x1e5c, 0x0000, 0x1e5e,
+	0x0000, 0x1e60, 0x0000, 0x1e62, 0x0000, 0x1e64, 0x0000, 0x1e66,
+	0x0000, 0x1e68, 0x0000, 0x1e6a, 0x0000, 0x1e6c, 0x0000, 0x1e6e,
+	0x0000, 0x1e70, 0x0000, 0x1e72, 0x0000, 0x1e74, 0x0000, 0x1e76,
+	0x0000, 0x1e78, 0x0000, 0x1e7a, 0x0000, 0x1e7c, 0x0000, 0x1e7e,
+	0x0000, 0x1e80, 0x0000, 0x1e82, 0x0000, 0x1e84, 0x0000, 0x1e86,
+	0x0000, 0x1e88, 0x0000, 0x1e8a, 0x0000, 0x1e8c, 0x0000, 0x1e8e,
+	0x0000, 0x1e90, 0x0000, 0x1e92, 0x0000, 0x1e94, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x1ea0, 0x0000, 0x1ea2, 0x0000, 0x1ea4, 0x0000, 0x1ea6,
+	0x0000, 0x1ea8, 0x0000, 0x1eaa, 0x0000, 0x1eac, 0x0000, 0x1eae,
+	0x0000, 0x1eb0, 0x0000, 0x1eb2, 0x0000, 0x1eb4, 0x0000, 0x1eb6,
+	0x0000, 0x1eb8, 0x0000, 0x1eba, 0x0000, 0x1ebc, 0x0000, 0x1ebe,
+	0x0000, 0x1ec0, 0x0000, 0x1ec2, 0x0000, 0x1ec4, 0x0000, 0x1ec6,
+	0x0000, 0x1ec8, 0x0000, 0x1eca, 0x0000, 0x1ecc, 0x0000, 0x1ece,
+	0x0000, 0x1ed0, 0x0000, 0x1ed2, 0x0000, 0x1ed4, 0x0000, 0x1ed6,
+	0x0000, 0x1ed8, 0x0000, 0x1eda, 0x0000, 0x1edc, 0x0000, 0x1ede,
+	0x0000, 0x1ee0, 0x0000, 0x1ee2, 0x0000, 0x1ee4, 0x0000, 0x1ee6,
+	0x0000, 0x1ee8, 0x0000, 0x1eea, 0x0000, 0x1eec, 0x0000, 0x1eee,
+	0x0000, 0x1ef0, 0x0000, 0x1ef2, 0x0000, 0x1ef4, 0x0000, 0x1ef6,
+	0x0000, 0x1ef8, 0x0000, 0x1efa, 0x0000, 0x1efc, 0x0000, 0x1efe,
+};
+
+static const wchar_t t2_1f[256] = {
+	0x1f08, 0x1f09, 0x1f0a, 0x1f0b, 0x1f0c, 0x1f0d, 0x1f0e, 0x1f0f,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x1f18, 0x1f19, 0x1f1a, 0x1f1b, 0x1f1c, 0x1f1d, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x1f28, 0x1f29, 0x1f2a, 0x1f2b, 0x1f2c, 0x1f2d, 0x1f2e, 0x1f2f,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x1f38, 0x1f39, 0x1f3a, 0x1f3b, 0x1f3c, 0x1f3d, 0x1f3e, 0x1f3f,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x1f48, 0x1f49, 0x1f4a, 0x1f4b, 0x1f4c, 0x1f4d, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x1f59, 0x0000, 0x1f5b, 0x0000, 0x1f5d, 0x0000, 0x1f5f,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x1f68, 0x1f69, 0x1f6a, 0x1f6b, 0x1f6c, 0x1f6d, 0x1f6e, 0x1f6f,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x1fba, 0x1fbb, 0x1fc8, 0x1fc9, 0x1fca, 0x1fcb, 0x1fda, 0x1fdb,
+	0x1ff8, 0x1ff9, 0x1fea, 0x1feb, 0x1ffa, 0x1ffb, 0x0000, 0x0000,
+	0x1f88, 0x1f89, 0x1f8a, 0x1f8b, 0x1f8c, 0x1f8d, 0x1f8e, 0x1f8f,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x1f98, 0x1f99, 0x1f9a, 0x1f9b, 0x1f9c, 0x1f9d, 0x1f9e, 0x1f9f,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x1fa8, 0x1fa9, 0x1faa, 0x1fab, 0x1fac, 0x1fad, 0x1fae, 0x1faf,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x1fb8, 0x1fb9, 0x0000, 0x1fbc, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x1fcc, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x1fd8, 0x1fd9, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x1fe8, 0x1fe9, 0x0000, 0x0000, 0x0000, 0x1fec, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x1ffc, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+};
+
+static const wchar_t t2_21[256] = {
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x2132, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x2160, 0x2161, 0x2162, 0x2163, 0x2164, 0x2165, 0x2166, 0x2167,
+	0x2168, 0x2169, 0x216a, 0x216b, 0x216c, 0x216d, 0x216e, 0x216f,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x2183, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+};
+
+static const wchar_t t2_24[256] = {
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x24b6, 0x24b7, 0x24b8, 0x24b9, 0x24ba, 0x24bb, 0x24bc, 0x24bd,
+	0x24be, 0x24bf, 0x24c0, 0x24c1, 0x24c2, 0x24c3, 0x24c4, 0x24c5,
+	0x24c6, 0x24c7, 0x24c8, 0x24c9, 0x24ca, 0x24cb, 0x24cc, 0x24cd,
+	0x24ce, 0x24cf, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+};
+
+static const wchar_t t2_2c[256] = {
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x2c00, 0x2c01, 0x2c02, 0x2c03, 0x2c04, 0x2c05, 0x2c06, 0x2c07,
+	0x2c08, 0x2c09, 0x2c0a, 0x2c0b, 0x2c0c, 0x2c0d, 0x2c0e, 0x2c0f,
+	0x2c10, 0x2c11, 0x2c12, 0x2c13, 0x2c14, 0x2c15, 0x2c16, 0x2c17,
+	0x2c18, 0x2c19, 0x2c1a, 0x2c1b, 0x2c1c, 0x2c1d, 0x2c1e, 0x2c1f,
+	0x2c20, 0x2c21, 0x2c22, 0x2c23, 0x2c24, 0x2c25, 0x2c26, 0x2c27,
+	0x2c28, 0x2c29, 0x2c2a, 0x2c2b, 0x2c2c, 0x2c2d, 0x2c2e, 0x0000,
+	0x0000, 0x2c60, 0x0000, 0x0000, 0x0000, 0x023a, 0x023e, 0x0000,
+	0x2c67, 0x0000, 0x2c69, 0x0000, 0x2c6b, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x2c72, 0x0000, 0x0000, 0x2c75, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x2c80, 0x0000, 0x2c82, 0x0000, 0x2c84, 0x0000, 0x2c86,
+	0x0000, 0x2c88, 0x0000, 0x2c8a, 0x0000, 0x2c8c, 0x0000, 0x2c8e,
+	0x0000, 0x2c90, 0x0000, 0x2c92, 0x0000, 0x2c94, 0x0000, 0x2c96,
+	0x0000, 0x2c98, 0x0000, 0x2c9a, 0x0000, 0x2c9c, 0x0000, 0x2c9e,
+	0x0000, 0x2ca0, 0x0000, 0x2ca2, 0x0000, 0x2ca4, 0x0000, 0x2ca6,
+	0x0000, 0x2ca8, 0x0000, 0x2caa, 0x0000, 0x2cac, 0x0000, 0x2cae,
+	0x0000, 0x2cb0, 0x0000, 0x2cb2, 0x0000, 0x2cb4, 0x0000, 0x2cb6,
+	0x0000, 0x2cb8, 0x0000, 0x2cba, 0x0000, 0x2cbc, 0x0000, 0x2cbe,
+	0x0000, 0x2cc0, 0x0000, 0x2cc2, 0x0000, 0x2cc4, 0x0000, 0x2cc6,
+	0x0000, 0x2cc8, 0x0000, 0x2cca, 0x0000, 0x2ccc, 0x0000, 0x2cce,
+	0x0000, 0x2cd0, 0x0000, 0x2cd2, 0x0000, 0x2cd4, 0x0000, 0x2cd6,
+	0x0000, 0x2cd8, 0x0000, 0x2cda, 0x0000, 0x2cdc, 0x0000, 0x2cde,
+	0x0000, 0x2ce0, 0x0000, 0x2ce2, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+};
+
+static const wchar_t t2_2d[256] = {
+	0x10a0, 0x10a1, 0x10a2, 0x10a3, 0x10a4, 0x10a5, 0x10a6, 0x10a7,
+	0x10a8, 0x10a9, 0x10aa, 0x10ab, 0x10ac, 0x10ad, 0x10ae, 0x10af,
+	0x10b0, 0x10b1, 0x10b2, 0x10b3, 0x10b4, 0x10b5, 0x10b6, 0x10b7,
+	0x10b8, 0x10b9, 0x10ba, 0x10bb, 0x10bc, 0x10bd, 0x10be, 0x10bf,
+	0x10c0, 0x10c1, 0x10c2, 0x10c3, 0x10c4, 0x10c5, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+};
+
+static const wchar_t t2_a6[256] = {
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0xa640, 0x0000, 0xa642, 0x0000, 0xa644, 0x0000, 0xa646,
+	0x0000, 0xa648, 0x0000, 0xa64a, 0x0000, 0xa64c, 0x0000, 0xa64e,
+	0x0000, 0xa650, 0x0000, 0xa652, 0x0000, 0xa654, 0x0000, 0xa656,
+	0x0000, 0xa658, 0x0000, 0xa65a, 0x0000, 0xa65c, 0x0000, 0xa65e,
+	0x0000, 0x0000, 0x0000, 0xa662, 0x0000, 0xa664, 0x0000, 0xa666,
+	0x0000, 0xa668, 0x0000, 0xa66a, 0x0000, 0xa66c, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0xa680, 0x0000, 0xa682, 0x0000, 0xa684, 0x0000, 0xa686,
+	0x0000, 0xa688, 0x0000, 0xa68a, 0x0000, 0xa68c, 0x0000, 0xa68e,
+	0x0000, 0xa690, 0x0000, 0xa692, 0x0000, 0xa694, 0x0000, 0xa696,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+};
+
+static const wchar_t t2_a7[256] = {
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0xa722, 0x0000, 0xa724, 0x0000, 0xa726,
+	0x0000, 0xa728, 0x0000, 0xa72a, 0x0000, 0xa72c, 0x0000, 0xa72e,
+	0x0000, 0x0000, 0x0000, 0xa732, 0x0000, 0xa734, 0x0000, 0xa736,
+	0x0000, 0xa738, 0x0000, 0xa73a, 0x0000, 0xa73c, 0x0000, 0xa73e,
+	0x0000, 0xa740, 0x0000, 0xa742, 0x0000, 0xa744, 0x0000, 0xa746,
+	0x0000, 0xa748, 0x0000, 0xa74a, 0x0000, 0xa74c, 0x0000, 0xa74e,
+	0x0000, 0xa750, 0x0000, 0xa752, 0x0000, 0xa754, 0x0000, 0xa756,
+	0x0000, 0xa758, 0x0000, 0xa75a, 0x0000, 0xa75c, 0x0000, 0xa75e,
+	0x0000, 0xa760, 0x0000, 0xa762, 0x0000, 0xa764, 0x0000, 0xa766,
+	0x0000, 0xa768, 0x0000, 0xa76a, 0x0000, 0xa76c, 0x0000, 0xa76e,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0xa779, 0x0000, 0xa77b, 0x0000, 0x0000, 0xa77e,
+	0x0000, 0xa780, 0x0000, 0xa782, 0x0000, 0xa784, 0x0000, 0xa786,
+	0x0000, 0x0000, 0x0000, 0x0000, 0xa78b, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+};
+
+static const wchar_t t2_ff[256] = {
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0xff21, 0xff22, 0xff23, 0xff24, 0xff25, 0xff26, 0xff27,
+	0xff28, 0xff29, 0xff2a, 0xff2b, 0xff2c, 0xff2d, 0xff2e, 0xff2f,
+	0xff30, 0xff31, 0xff32, 0xff33, 0xff34, 0xff35, 0xff36, 0xff37,
+	0xff38, 0xff39, 0xff3a, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+};
+
+static const wchar_t *const toplevel[256] = {
+	t2_00, t2_01, t2_02, t2_03, t2_04, t2_05,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL, t2_1d, t2_1e, t2_1f,
+	NULL, t2_21,  NULL,  NULL, t2_24,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL, t2_2c, t2_2d,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL, t2_a6, t2_a7,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
+	NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL, t2_ff,
+};
+
+/**
+ * cifs_toupper - convert a wchar_t from lower to uppercase
+ * @in: character to convert from lower to uppercase
+ *
+ * This function consults the static tables above to convert a wchar_t from
+ * lower to uppercase. In the event that there is no mapping, the original
+ * "in" character is returned.
+ */
+wchar_t
+cifs_toupper(wchar_t in)
+{
+	unsigned char idx;
+	const wchar_t *tbl;
+	wchar_t out;
+
+	/* grab upper byte */
+	idx = (in & 0xff00) >> 8;
+
+	/* find pointer to 2nd layer table */
+	tbl = toplevel[idx];
+	if (!tbl)
+		return in;
+
+	/* grab lower byte */
+	idx = in & 0xff;
+
+	/* look up character in table */
+	out = tbl[idx];
+	if (out)
+		return out;
+
+	return in;
+}
diff --git a/fs/smb/client/xattr.c b/fs/smb/client/xattr.c
new file mode 100644
index 0000000000..c2bf829310
--- /dev/null
+++ b/fs/smb/client/xattr.c
@@ -0,0 +1,494 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ *
+ *   Copyright (c) International Business Machines  Corp., 2003, 2007
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ */
+
+#include <linux/fs.h>
+#include <linux/posix_acl_xattr.h>
+#include <linux/slab.h>
+#include <linux/xattr.h>
+#include "cifsfs.h"
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifs_fs_sb.h"
+#include "cifs_unicode.h"
+#include "cifs_ioctl.h"
+
+#define MAX_EA_VALUE_SIZE CIFSMaxBufSize
+#define CIFS_XATTR_CIFS_ACL "system.cifs_acl" /* DACL only */
+#define CIFS_XATTR_CIFS_NTSD "system.cifs_ntsd" /* owner plus DACL */
+#define CIFS_XATTR_CIFS_NTSD_FULL "system.cifs_ntsd_full" /* owner/DACL/SACL */
+#define CIFS_XATTR_ATTRIB "cifs.dosattrib"  /* full name: user.cifs.dosattrib */
+#define CIFS_XATTR_CREATETIME "cifs.creationtime"  /* user.cifs.creationtime */
+/*
+ * Although these three are just aliases for the above, need to move away from
+ * confusing users and using the 20+ year old term 'cifs' when it is no longer
+ * secure, replaced by SMB2 (then even more highly secure SMB3) many years ago
+ */
+#define SMB3_XATTR_CIFS_ACL "system.smb3_acl" /* DACL only */
+#define SMB3_XATTR_CIFS_NTSD "system.smb3_ntsd" /* owner plus DACL */
+#define SMB3_XATTR_CIFS_NTSD_FULL "system.smb3_ntsd_full" /* owner/DACL/SACL */
+#define SMB3_XATTR_ATTRIB "smb3.dosattrib"  /* full name: user.smb3.dosattrib */
+#define SMB3_XATTR_CREATETIME "smb3.creationtime"  /* user.smb3.creationtime */
+/* BB need to add server (Samba e.g) support for security and trusted prefix */
+
+enum { XATTR_USER, XATTR_CIFS_ACL, XATTR_ACL_ACCESS, XATTR_ACL_DEFAULT,
+	XATTR_CIFS_NTSD, XATTR_CIFS_NTSD_FULL };
+
+static int cifs_attrib_set(unsigned int xid, struct cifs_tcon *pTcon,
+			   struct inode *inode, const char *full_path,
+			   const void *value, size_t size)
+{
+	ssize_t rc = -EOPNOTSUPP;
+	__u32 *pattrib = (__u32 *)value;
+	__u32 attrib;
+	FILE_BASIC_INFO info_buf;
+
+	if ((value == NULL) || (size != sizeof(__u32)))
+		return -ERANGE;
+
+	memset(&info_buf, 0, sizeof(info_buf));
+	attrib = *pattrib;
+	info_buf.Attributes = cpu_to_le32(attrib);
+	if (pTcon->ses->server->ops->set_file_info)
+		rc = pTcon->ses->server->ops->set_file_info(inode, full_path,
+				&info_buf, xid);
+	if (rc == 0)
+		CIFS_I(inode)->cifsAttrs = attrib;
+
+	return rc;
+}
+
+static int cifs_creation_time_set(unsigned int xid, struct cifs_tcon *pTcon,
+				  struct inode *inode, const char *full_path,
+				  const void *value, size_t size)
+{
+	ssize_t rc = -EOPNOTSUPP;
+	__u64 *pcreation_time = (__u64 *)value;
+	__u64 creation_time;
+	FILE_BASIC_INFO info_buf;
+
+	if ((value == NULL) || (size != sizeof(__u64)))
+		return -ERANGE;
+
+	memset(&info_buf, 0, sizeof(info_buf));
+	creation_time = *pcreation_time;
+	info_buf.CreationTime = cpu_to_le64(creation_time);
+	if (pTcon->ses->server->ops->set_file_info)
+		rc = pTcon->ses->server->ops->set_file_info(inode, full_path,
+				&info_buf, xid);
+	if (rc == 0)
+		CIFS_I(inode)->createtime = creation_time;
+
+	return rc;
+}
+
+static int cifs_xattr_set(const struct xattr_handler *handler,
+			  struct mnt_idmap *idmap,
+			  struct dentry *dentry, struct inode *inode,
+			  const char *name, const void *value,
+			  size_t size, int flags)
+{
+	int rc = -EOPNOTSUPP;
+	unsigned int xid;
+	struct super_block *sb = dentry->d_sb;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	struct tcon_link *tlink;
+	struct cifs_tcon *pTcon;
+	const char *full_path;
+	void *page;
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+	pTcon = tlink_tcon(tlink);
+
+	xid = get_xid();
+	page = alloc_dentry_path();
+
+	full_path = build_path_from_dentry(dentry, page);
+	if (IS_ERR(full_path)) {
+		rc = PTR_ERR(full_path);
+		goto out;
+	}
+	/* return dos attributes as pseudo xattr */
+	/* return alt name if available as pseudo attr */
+
+	/* if proc/fs/cifs/streamstoxattr is set then
+		search server for EAs or streams to
+		returns as xattrs */
+	if (size > MAX_EA_VALUE_SIZE) {
+		cifs_dbg(FYI, "size of EA value too large\n");
+		rc = -EOPNOTSUPP;
+		goto out;
+	}
+
+	switch (handler->flags) {
+	case XATTR_USER:
+		cifs_dbg(FYI, "%s:setting user xattr %s\n", __func__, name);
+		if ((strcmp(name, CIFS_XATTR_ATTRIB) == 0) ||
+		    (strcmp(name, SMB3_XATTR_ATTRIB) == 0)) {
+			rc = cifs_attrib_set(xid, pTcon, inode, full_path,
+					value, size);
+			if (rc == 0) /* force revalidate of the inode */
+				CIFS_I(inode)->time = 0;
+			break;
+		} else if ((strcmp(name, CIFS_XATTR_CREATETIME) == 0) ||
+			   (strcmp(name, SMB3_XATTR_CREATETIME) == 0)) {
+			rc = cifs_creation_time_set(xid, pTcon, inode,
+					full_path, value, size);
+			if (rc == 0) /* force revalidate of the inode */
+				CIFS_I(inode)->time = 0;
+			break;
+		}
+
+		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
+			goto out;
+
+		if (pTcon->ses->server->ops->set_EA) {
+			rc = pTcon->ses->server->ops->set_EA(xid, pTcon,
+				full_path, name, value, (__u16)size,
+				cifs_sb->local_nls, cifs_sb);
+			if (rc == 0)
+				inode_set_ctime_current(inode);
+		}
+		break;
+
+	case XATTR_CIFS_ACL:
+	case XATTR_CIFS_NTSD:
+	case XATTR_CIFS_NTSD_FULL: {
+		struct cifs_ntsd *pacl;
+
+		if (!value)
+			goto out;
+		pacl = kmalloc(size, GFP_KERNEL);
+		if (!pacl) {
+			rc = -ENOMEM;
+		} else {
+			memcpy(pacl, value, size);
+			if (pTcon->ses->server->ops->set_acl) {
+				int aclflags = 0;
+				rc = 0;
+
+				switch (handler->flags) {
+				case XATTR_CIFS_NTSD_FULL:
+					aclflags = (CIFS_ACL_OWNER |
+						    CIFS_ACL_GROUP |
+						    CIFS_ACL_DACL |
+						    CIFS_ACL_SACL);
+					break;
+				case XATTR_CIFS_NTSD:
+					aclflags = (CIFS_ACL_OWNER |
+						    CIFS_ACL_GROUP |
+						    CIFS_ACL_DACL);
+					break;
+				case XATTR_CIFS_ACL:
+				default:
+					aclflags = CIFS_ACL_DACL;
+				}
+
+				rc = pTcon->ses->server->ops->set_acl(pacl,
+					size, inode, full_path, aclflags);
+			} else {
+				rc = -EOPNOTSUPP;
+			}
+			if (rc == 0) /* force revalidate of the inode */
+				CIFS_I(inode)->time = 0;
+			kfree(pacl);
+		}
+		break;
+	}
+	}
+
+out:
+	free_dentry_path(page);
+	free_xid(xid);
+	cifs_put_tlink(tlink);
+	return rc;
+}
+
+static int cifs_attrib_get(struct dentry *dentry,
+			   struct inode *inode, void *value,
+			   size_t size)
+{
+	ssize_t rc;
+	__u32 *pattribute;
+
+	rc = cifs_revalidate_dentry_attr(dentry);
+
+	if (rc)
+		return rc;
+
+	if ((value == NULL) || (size == 0))
+		return sizeof(__u32);
+	else if (size < sizeof(__u32))
+		return -ERANGE;
+
+	/* return dos attributes as pseudo xattr */
+	pattribute = (__u32 *)value;
+	*pattribute = CIFS_I(inode)->cifsAttrs;
+
+	return sizeof(__u32);
+}
+
+static int cifs_creation_time_get(struct dentry *dentry, struct inode *inode,
+				  void *value, size_t size)
+{
+	ssize_t rc;
+	__u64 *pcreatetime;
+
+	rc = cifs_revalidate_dentry_attr(dentry);
+	if (rc)
+		return rc;
+
+	if ((value == NULL) || (size == 0))
+		return sizeof(__u64);
+	else if (size < sizeof(__u64))
+		return -ERANGE;
+
+	/* return dos attributes as pseudo xattr */
+	pcreatetime = (__u64 *)value;
+	*pcreatetime = CIFS_I(inode)->createtime;
+	return sizeof(__u64);
+}
+
+
+static int cifs_xattr_get(const struct xattr_handler *handler,
+			  struct dentry *dentry, struct inode *inode,
+			  const char *name, void *value, size_t size)
+{
+	ssize_t rc = -EOPNOTSUPP;
+	unsigned int xid;
+	struct super_block *sb = dentry->d_sb;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	struct tcon_link *tlink;
+	struct cifs_tcon *pTcon;
+	const char *full_path;
+	void *page;
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+	pTcon = tlink_tcon(tlink);
+
+	xid = get_xid();
+	page = alloc_dentry_path();
+
+	full_path = build_path_from_dentry(dentry, page);
+	if (IS_ERR(full_path)) {
+		rc = PTR_ERR(full_path);
+		goto out;
+	}
+
+	/* return alt name if available as pseudo attr */
+	switch (handler->flags) {
+	case XATTR_USER:
+		cifs_dbg(FYI, "%s:querying user xattr %s\n", __func__, name);
+		if ((strcmp(name, CIFS_XATTR_ATTRIB) == 0) ||
+		    (strcmp(name, SMB3_XATTR_ATTRIB) == 0)) {
+			rc = cifs_attrib_get(dentry, inode, value, size);
+			break;
+		} else if ((strcmp(name, CIFS_XATTR_CREATETIME) == 0) ||
+		    (strcmp(name, SMB3_XATTR_CREATETIME) == 0)) {
+			rc = cifs_creation_time_get(dentry, inode, value, size);
+			break;
+		}
+
+		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
+			goto out;
+
+		if (pTcon->ses->server->ops->query_all_EAs)
+			rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
+				full_path, name, value, size, cifs_sb);
+		break;
+
+	case XATTR_CIFS_ACL:
+	case XATTR_CIFS_NTSD:
+	case XATTR_CIFS_NTSD_FULL: {
+		/*
+		 * fetch owner, DACL, and SACL if asked for full descriptor,
+		 * fetch owner and DACL otherwise
+		 */
+		u32 acllen, extra_info;
+		struct cifs_ntsd *pacl;
+
+		if (pTcon->ses->server->ops->get_acl == NULL)
+			goto out; /* rc already EOPNOTSUPP */
+
+		if (handler->flags == XATTR_CIFS_NTSD_FULL) {
+			extra_info = SACL_SECINFO;
+		} else {
+			extra_info = 0;
+		}
+		pacl = pTcon->ses->server->ops->get_acl(cifs_sb,
+				inode, full_path, &acllen, extra_info);
+		if (IS_ERR(pacl)) {
+			rc = PTR_ERR(pacl);
+			cifs_dbg(VFS, "%s: error %zd getting sec desc\n",
+				 __func__, rc);
+		} else {
+			if (value) {
+				if (acllen > size)
+					acllen = -ERANGE;
+				else
+					memcpy(value, pacl, acllen);
+			}
+			rc = acllen;
+			kfree(pacl);
+		}
+		break;
+	}
+	}
+
+	/* We could add an additional check for streams ie
+	    if proc/fs/cifs/streamstoxattr is set then
+		search server for EAs or streams to
+		returns as xattrs */
+
+	if (rc == -EINVAL)
+		rc = -EOPNOTSUPP;
+
+out:
+	free_dentry_path(page);
+	free_xid(xid);
+	cifs_put_tlink(tlink);
+	return rc;
+}
+
+ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size)
+{
+	ssize_t rc = -EOPNOTSUPP;
+	unsigned int xid;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
+	struct tcon_link *tlink;
+	struct cifs_tcon *pTcon;
+	const char *full_path;
+	void *page;
+
+	if (unlikely(cifs_forced_shutdown(cifs_sb)))
+		return -EIO;
+
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
+		return -EOPNOTSUPP;
+
+	tlink = cifs_sb_tlink(cifs_sb);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+	pTcon = tlink_tcon(tlink);
+
+	xid = get_xid();
+	page = alloc_dentry_path();
+
+	full_path = build_path_from_dentry(direntry, page);
+	if (IS_ERR(full_path)) {
+		rc = PTR_ERR(full_path);
+		goto list_ea_exit;
+	}
+	/* return dos attributes as pseudo xattr */
+	/* return alt name if available as pseudo attr */
+
+	/* if proc/fs/cifs/streamstoxattr is set then
+		search server for EAs or streams to
+		returns as xattrs */
+
+	if (pTcon->ses->server->ops->query_all_EAs)
+		rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
+				full_path, NULL, data, buf_size, cifs_sb);
+list_ea_exit:
+	free_dentry_path(page);
+	free_xid(xid);
+	cifs_put_tlink(tlink);
+	return rc;
+}
+
+static const struct xattr_handler cifs_user_xattr_handler = {
+	.prefix = XATTR_USER_PREFIX,
+	.flags = XATTR_USER,
+	.get = cifs_xattr_get,
+	.set = cifs_xattr_set,
+};
+
+/* os2.* attributes are treated like user.* attributes */
+static const struct xattr_handler cifs_os2_xattr_handler = {
+	.prefix = XATTR_OS2_PREFIX,
+	.flags = XATTR_USER,
+	.get = cifs_xattr_get,
+	.set = cifs_xattr_set,
+};
+
+static const struct xattr_handler cifs_cifs_acl_xattr_handler = {
+	.name = CIFS_XATTR_CIFS_ACL,
+	.flags = XATTR_CIFS_ACL,
+	.get = cifs_xattr_get,
+	.set = cifs_xattr_set,
+};
+
+/*
+ * Although this is just an alias for the above, need to move away from
+ * confusing users and using the 20 year old term 'cifs' when it is no
+ * longer secure and was replaced by SMB2/SMB3 a long time ago, and
+ * SMB3 and later are highly secure.
+ */
+static const struct xattr_handler smb3_acl_xattr_handler = {
+	.name = SMB3_XATTR_CIFS_ACL,
+	.flags = XATTR_CIFS_ACL,
+	.get = cifs_xattr_get,
+	.set = cifs_xattr_set,
+};
+
+static const struct xattr_handler cifs_cifs_ntsd_xattr_handler = {
+	.name = CIFS_XATTR_CIFS_NTSD,
+	.flags = XATTR_CIFS_NTSD,
+	.get = cifs_xattr_get,
+	.set = cifs_xattr_set,
+};
+
+/*
+ * Although this is just an alias for the above, need to move away from
+ * confusing users and using the 20 year old term 'cifs' when it is no
+ * longer secure and was replaced by SMB2/SMB3 a long time ago, and
+ * SMB3 and later are highly secure.
+ */
+static const struct xattr_handler smb3_ntsd_xattr_handler = {
+	.name = SMB3_XATTR_CIFS_NTSD,
+	.flags = XATTR_CIFS_NTSD,
+	.get = cifs_xattr_get,
+	.set = cifs_xattr_set,
+};
+
+static const struct xattr_handler cifs_cifs_ntsd_full_xattr_handler = {
+	.name = CIFS_XATTR_CIFS_NTSD_FULL,
+	.flags = XATTR_CIFS_NTSD_FULL,
+	.get = cifs_xattr_get,
+	.set = cifs_xattr_set,
+};
+
+/*
+ * Although this is just an alias for the above, need to move away from
+ * confusing users and using the 20 year old term 'cifs' when it is no
+ * longer secure and was replaced by SMB2/SMB3 a long time ago, and
+ * SMB3 and later are highly secure.
+ */
+static const struct xattr_handler smb3_ntsd_full_xattr_handler = {
+	.name = SMB3_XATTR_CIFS_NTSD_FULL,
+	.flags = XATTR_CIFS_NTSD_FULL,
+	.get = cifs_xattr_get,
+	.set = cifs_xattr_set,
+};
+
+const struct xattr_handler *cifs_xattr_handlers[] = {
+	&cifs_user_xattr_handler,
+	&cifs_os2_xattr_handler,
+	&cifs_cifs_acl_xattr_handler,
+	&smb3_acl_xattr_handler, /* alias for above since avoiding "cifs" */
+	&cifs_cifs_ntsd_xattr_handler,
+	&smb3_ntsd_xattr_handler, /* alias for above since avoiding "cifs" */
+	&cifs_cifs_ntsd_full_xattr_handler,
+	&smb3_ntsd_full_xattr_handler, /* alias for above since avoiding "cifs" */
+	NULL
+};