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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /fs/smb/client/smb2pdu.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/smb/client/smb2pdu.c')
-rw-r--r--fs/smb/client/smb2pdu.c5774
1 files changed, 5774 insertions, 0 deletions
diff --git a/fs/smb/client/smb2pdu.c b/fs/smb/client/smb2pdu.c
new file mode 100644
index 000000000..e65f998ea
--- /dev/null
+++ b/fs/smb/client/smb2pdu.c
@@ -0,0 +1,5774 @@
+// 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->dialect >= SMB30_PROT_ID) {
+ /* After reconnect SMB3 must set ChannelSequence on subsequent reqs */
+ smb3_hdr = (struct smb3_hdr_req *)shdr;
+ /* if primary channel is not set yet, use default channel for chan sequence num */
+ if (CIFS_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);
+ }
+ if (server) {
+ 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;
+}
+
+static int
+smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon,
+ struct TCP_Server_Info *server)
+{
+ int rc = 0;
+ struct nls_table *nls_codepage = NULL;
+ struct cifs_ses *ses;
+
+ /*
+ * 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;
+ }
+ }
+ 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);
+ /*
+ * 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 = load_nls_default();
+
+ /*
+ * 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);
+ 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);
+ mutex_unlock(&ses->session_mutex);
+
+ cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
+ if (rc) {
+ /* If sess reconnected but tcon didn't, something strange ... */
+ cifs_dbg(VFS, "reconnect tcon failed rc = %d\n", rc);
+ goto out;
+ }
+
+ 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_IOCTL:
+ case SMB2_QUERY_DIRECTORY:
+ case SMB2_CHANGE_NOTIFY:
+ case SMB2_QUERY_INFO:
+ case SMB2_SET_INFO:
+ rc = -EAGAIN;
+ }
+failed:
+ unload_nls(nls_codepage);
+ 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);
+ 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 = CIFS_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)
+{
+ struct smb2_create_req *req = iov[0].iov_base;
+ unsigned int num = *num_iovec;
+
+ iov[num].iov_base = create_posix_buf(mode);
+ if (mode == ACL_NO_MODE)
+ cifs_dbg(FYI, "Invalid mode\n");
+ if (iov[num].iov_base == NULL)
+ return -ENOMEM;
+ iov[num].iov_len = sizeof(struct create_posix);
+ if (!req->CreateContextsOffset)
+ req->CreateContextsOffset = cpu_to_le32(
+ sizeof(struct smb2_create_req) +
+ iov[num - 1].iov_len);
+ le32_add_cpu(&req->CreateContextsLength, 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) + 1;
+ unc_path_len *= 2;
+ if (unc_path_len < 2) {
+ kfree(unc_path);
+ return -EINVAL;
+ }
+
+ /* 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 - 2);
+ 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);
+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_on_disk_id *pdisk_id = (struct create_on_disk_id *)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);
+}
+
+void
+smb2_parse_contexts(struct TCP_Server_Info *server,
+ struct smb2_create_rsp *rsp,
+ unsigned int *epoch, char *lease_key, __u8 *oplock,
+ struct smb2_file_all_info *buf,
+ struct create_posix_rsp *posix)
+{
+ char *data_offset;
+ struct create_context *cc;
+ unsigned int next;
+ unsigned int remaining;
+ 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;
+ data_offset = (char *)rsp + le32_to_cpu(rsp->CreateContextsOffset);
+ remaining = le32_to_cpu(rsp->CreateContextsLength);
+ cc = (struct create_context *)data_offset;
+
+ /* Initialize inode number to 0 in case no valid data in qfid context */
+ if (buf)
+ buf->IndexNumber = 0;
+
+ while (remaining >= sizeof(struct create_context)) {
+ name = le16_to_cpu(cc->NameOffset) + (char *)cc;
+ if (le16_to_cpu(cc->NameLength) == 4 &&
+ strncmp(name, SMB2_CREATE_REQUEST_LEASE, 4) == 0)
+ *oplock = server->ops->parse_lease_buf(cc, epoch,
+ lease_key);
+ else if (buf && (le16_to_cpu(cc->NameLength) == 4) &&
+ strncmp(name, SMB2_CREATE_QUERY_ON_DISK_ID, 4) == 0)
+ parse_query_id_ctxt(cc, buf);
+ else if ((le16_to_cpu(cc->NameLength) == 16)) {
+ if (posix &&
+ memcmp(name, smb3_create_tag_posix, 16) == 0)
+ parse_posix_ctxt(cc, buf, posix);
+ }
+ /* else {
+ cifs_dbg(FYI, "Context not matched with len %d\n",
+ le16_to_cpu(cc->NameLength));
+ cifs_dump_mem("Cctxt name: ", name, 4);
+ } */
+
+ next = le32_to_cpu(cc->Next);
+ if (!next)
+ break;
+ remaining -= next;
+ cc = (struct create_context *)((char *)cc + next);
+ }
+
+ if (rsp->OplockLevel != SMB2_OPLOCK_LEVEL_LEASE)
+ *oplock = rsp->OplockLevel;
+
+ return;
+}
+
+static int
+add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
+ unsigned int *num_iovec, u8 *lease_key, __u8 *oplock)
+{
+ struct smb2_create_req *req = iov[0].iov_base;
+ 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;
+ if (!req->CreateContextsOffset)
+ req->CreateContextsOffset = cpu_to_le32(
+ sizeof(struct smb2_create_req) +
+ iov[num - 1].iov_len);
+ le32_add_cpu(&req->CreateContextsLength,
+ server->vals->create_lease_size);
+ *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
+ * 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)
+{
+ struct smb2_create_req *req = iov[0].iov_base;
+ 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);
+ if (!req->CreateContextsOffset)
+ req->CreateContextsOffset =
+ cpu_to_le32(sizeof(struct smb2_create_req) +
+ iov[1].iov_len);
+ le32_add_cpu(&req->CreateContextsLength, 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)
+{
+ struct smb2_create_req *req = iov[0].iov_base;
+ 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);
+ if (!req->CreateContextsOffset)
+ req->CreateContextsOffset =
+ cpu_to_le32(sizeof(struct smb2_create_req) +
+ iov[1].iov_len);
+ le32_add_cpu(&req->CreateContextsLength,
+ 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)
+{
+ struct smb2_create_req *req = iov[0].iov_base;
+ 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);
+ if (!req->CreateContextsOffset)
+ req->CreateContextsOffset =
+ cpu_to_le32(sizeof(struct smb2_create_req) +
+ iov[1].iov_len);
+ le32_add_cpu(&req->CreateContextsLength, 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)
+{
+ struct smb2_create_req *req = iov[0].iov_base;
+ 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);
+ if (!req->CreateContextsOffset)
+ req->CreateContextsOffset = cpu_to_le32(
+ sizeof(struct smb2_create_req) +
+ iov[num - 1].iov_len);
+ le32_add_cpu(&req->CreateContextsLength, sizeof(struct crt_twarp_ctxt));
+ *num_iovec = num + 1;
+ return 0;
+}
+
+/* See 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)
+{
+ struct smb2_create_req *req = iov[0].iov_base;
+ 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;
+ if (!req->CreateContextsOffset)
+ req->CreateContextsOffset = cpu_to_le32(
+ sizeof(struct smb2_create_req) +
+ iov[num - 1].iov_len);
+ le32_add_cpu(&req->CreateContextsLength, 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)
+{
+ struct smb2_create_req *req = iov[0].iov_base;
+ 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);
+ if (!req->CreateContextsOffset)
+ req->CreateContextsOffset = cpu_to_le32(
+ sizeof(struct smb2_create_req) +
+ iov[num - 1].iov_len);
+ le32_add_cpu(&req->CreateContextsLength, 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(*out_path, sep);
+ UniStrcat(*out_path, 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;
+ 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, iov, &n_iov,
+ oparms->fid->lease_key, oplock);
+ if (rc)
+ return rc;
+ }
+
+ if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
+ /* need to set Next field of lease context if we request it */
+ if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
+ struct create_context *ccontext =
+ (struct create_context *)iov[n_iov-1].iov_base;
+ ccontext->Next =
+ cpu_to_le32(server->vals->create_lease_size);
+ }
+
+ rc = add_durable_context(iov, &n_iov, oparms,
+ tcon->use_persistent);
+ if (rc)
+ return rc;
+ }
+
+ if (tcon->posix_extensions) {
+ if (n_iov > 2) {
+ struct create_context *ccontext =
+ (struct create_context *)iov[n_iov-1].iov_base;
+ ccontext->Next =
+ cpu_to_le32(iov[n_iov-1].iov_len);
+ }
+
+ rc = add_posix_context(iov, &n_iov, oparms->mode);
+ if (rc)
+ return rc;
+ }
+
+ if (tcon->snapshot_time) {
+ cifs_dbg(FYI, "adding snapshot context\n");
+ if (n_iov > 2) {
+ struct create_context *ccontext =
+ (struct create_context *)iov[n_iov-1].iov_base;
+ ccontext->Next =
+ cpu_to_le32(iov[n_iov-1].iov_len);
+ }
+
+ 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) {
+ if (n_iov > 2) {
+ struct create_context *ccontext =
+ (struct create_context *)iov[n_iov-1].iov_base;
+ ccontext->Next = cpu_to_le32(iov[n_iov-1].iov_len);
+ }
+
+ 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;
+ }
+ }
+
+ if (n_iov > 2) {
+ struct create_context *ccontext =
+ (struct create_context *)iov[n_iov-1].iov_base;
+ ccontext->Next = cpu_to_le32(iov[n_iov-1].iov_len);
+ }
+ add_query_id_context(iov, &n_iov);
+
+ 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;
+ }
+
+
+ smb2_parse_contexts(server, rsp, &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;
+
+ /* If server is a channel, select the primary channel */
+ pserver = CIFS_SERVER_IS_CHAN(server) ? server->primary_server : server;
+
+ /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
+ mutex_lock(&pserver->reconnect_mutex);
+
+ 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;
+ ses->ses_count++;
+ }
+ /*
+ * 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;
+ ses->ses_count++;
+ }
+ spin_unlock(&ses->chan_lock);
+ }
+ /*
+ * Get the reference to server struct to be sure that the last call of
+ * cifs_put_tcon() in the loop below won't release the server pointer.
+ */
+ if (tcon_exist || ses_exist)
+ server->srv_count++;
+
+ spin_unlock(&cifs_tcp_ses_lock);
+
+ list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
+ rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon, server);
+ 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 = tconInfoAlloc();
+ 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);
+ 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 */
+ if (tcon_exist || ses_exist)
+ cifs_put_tcp_session(server, 1);
+}
+
+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->pages,
+ rdata->nr_pages, rdata->page_offset,
+ rdata->tailsz, 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_pages = rdata->pages;
+ rqst.rq_offset = rdata->page_offset;
+ rqst.rq_npages = rdata->nr_pages;
+ rqst.rq_pagesz = rdata->pagesz;
+ rqst.rq_tailsz = rdata->tailsz;
+ }
+
+ 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;
+
+ 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 = 0;
+ 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;
+ bool need_invalidate = server->dialect == SMB30_PROT_ID;
+
+ wdata->mr = smbd_register_mr(
+ server->smbd_conn, wdata->pages,
+ wdata->nr_pages, wdata->page_offset,
+ wdata->tailsz, false, need_invalidate);
+ if (!wdata->mr) {
+ rc = -EAGAIN;
+ goto async_writev_out;
+ }
+ req->Length = 0;
+ req->DataOffset = 0;
+ if (wdata->nr_pages > 1)
+ req->RemainingBytes =
+ cpu_to_le32(
+ (wdata->nr_pages - 1) * wdata->pagesz -
+ wdata->page_offset + wdata->tailsz
+ );
+ else
+ req->RemainingBytes = cpu_to_le32(wdata->tailsz);
+ 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_pages = wdata->pages;
+ rqst.rq_offset = wdata->page_offset;
+ rqst.rq_npages = wdata->nr_pages;
+ rqst.rq_pagesz = wdata->pagesz;
+ rqst.rq_tailsz = wdata->tailsz;
+#ifdef CONFIG_CIFS_SMB_DIRECT
+ if (wdata->mr) {
+ iov[0].iov_len += sizeof(struct smbd_buffer_descriptor_v1);
+ rqst.rq_npages = 0;
+ }
+#endif
+ cifs_dbg(FYI, "async write at %llu %u bytes\n",
+ io_parms->offset, io_parms->length);
+
+#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) - 1;
+ break;
+ case SMB_FIND_FILE_ID_FULL_DIR_INFO:
+ info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
+ 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;
+}