Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

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

1 files changed, 2546 insertions, 0 deletions

diff --git a/source3/modules/vfs_gpfs.c b/source3/modules/vfs_gpfs.c
new file mode 100644
index 0000000..a8b4e38
--- /dev/null
+++ b/source3/modules/vfs_gpfs.c
@@ -0,0 +1,2546 @@
+/*
+ *  Unix SMB/CIFS implementation.
+ *  Samba VFS module for GPFS filesystem
+ *  Copyright (C) Christian Ambach <cambach1@de.ibm.com> 2006
+ *  Copyright (C) Christof Schmitt 2015
+ *  Major code contributions by Chetan Shringarpure <chetan.sh@in.ibm.com>
+ *                           and Gomati Mohanan <gomati.mohanan@in.ibm.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "includes.h"
+#include "smbd/smbd.h"
+#include "include/smbprofile.h"
+#include "modules/non_posix_acls.h"
+#include "libcli/security/security.h"
+#include "nfs4_acls.h"
+#include "system/filesys.h"
+#include "auth.h"
+#include "lib/util/tevent_unix.h"
+#include "lib/util/gpfswrap.h"
+
+#include <gnutls/gnutls.h>
+#include <gnutls/crypto.h>
+#include "lib/crypto/gnutls_helpers.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_VFS
+
+#ifndef GPFS_GETACL_NATIVE
+#define GPFS_GETACL_NATIVE 0x00000004
+#endif
+
+struct gpfs_config_data {
+	struct smbacl4_vfs_params nfs4_params;
+	bool sharemodes;
+	bool leases;
+	bool hsm;
+	bool syncio;
+	bool winattr;
+	bool ftruncate;
+	bool getrealfilename;
+	bool dfreequota;
+	bool acl;
+	bool settimes;
+	bool recalls;
+	struct {
+		bool gpfs_fstat_x;
+	} pathref_ok;
+};
+
+struct gpfs_fsp_extension {
+	bool offline;
+};
+
+static inline unsigned int gpfs_acl_flags(gpfs_acl_t *gacl)
+{
+	if (gacl->acl_level == GPFS_ACL_LEVEL_V4FLAGS) {
+		return gacl->v4Level1.acl_flags;
+	}
+	return 0;
+}
+
+static inline gpfs_ace_v4_t *gpfs_ace_ptr(gpfs_acl_t *gacl, unsigned int i)
+{
+	if (gacl->acl_level == GPFS_ACL_LEVEL_V4FLAGS) {
+		return &gacl->v4Level1.ace_v4[i];
+	}
+	return &gacl->ace_v4[i];
+}
+
+static unsigned int vfs_gpfs_access_mask_to_allow(uint32_t access_mask)
+{
+	unsigned int allow = GPFS_SHARE_NONE;
+
+	if (access_mask & (FILE_WRITE_DATA|FILE_APPEND_DATA)) {
+		allow |= GPFS_SHARE_WRITE;
+	}
+	if (access_mask & (FILE_READ_DATA|FILE_EXECUTE)) {
+		allow |= GPFS_SHARE_READ;
+	}
+
+	return allow;
+}
+
+static unsigned int vfs_gpfs_share_access_to_deny(uint32_t share_access)
+{
+	unsigned int deny = GPFS_DENY_NONE;
+
+	if (!(share_access & FILE_SHARE_WRITE)) {
+		deny |= GPFS_DENY_WRITE;
+	}
+	if (!(share_access & FILE_SHARE_READ)) {
+		deny |= GPFS_DENY_READ;
+	}
+
+	/*
+	 * GPFS_DENY_DELETE can only be set together with either
+	 * GPFS_DENY_WRITE or GPFS_DENY_READ.
+	 */
+	if ((deny & (GPFS_DENY_WRITE|GPFS_DENY_READ)) &&
+	    !(share_access & FILE_SHARE_DELETE)) {
+		deny |= GPFS_DENY_DELETE;
+	}
+
+	return deny;
+}
+
+static int set_gpfs_sharemode(files_struct *fsp, uint32_t access_mask,
+			      uint32_t share_access)
+{
+	unsigned int allow = GPFS_SHARE_NONE;
+	unsigned int deny = GPFS_DENY_NONE;
+	int result;
+
+	if (access_mask == 0) {
+		DBG_DEBUG("Clearing file system share mode.\n");
+	} else {
+		allow = vfs_gpfs_access_mask_to_allow(access_mask);
+		deny = vfs_gpfs_share_access_to_deny(share_access);
+	}
+	DBG_DEBUG("access_mask=0x%x, allow=0x%x, share_access=0x%x, "
+		  "deny=0x%x\n", access_mask, allow, share_access, deny);
+
+	result = gpfswrap_set_share(fsp_get_io_fd(fsp), allow, deny);
+	if (result == 0) {
+		return 0;
+	}
+
+	if (errno == EACCES) {
+		DBG_NOTICE("GPFS share mode denied for %s/%s.\n",
+			   fsp->conn->connectpath,
+			   fsp->fsp_name->base_name);
+	} else if (errno == EPERM) {
+		DBG_ERR("Samba requested GPFS sharemode for %s/%s, but the "
+			"GPFS file system is not configured accordingly. "
+			"Configure file system with mmchfs -D nfs4 or "
+			"set gpfs:sharemodes=no in Samba.\n",
+			fsp->conn->connectpath,
+			fsp->fsp_name->base_name);
+	} else {
+		DBG_ERR("gpfs_set_share failed: %s\n", strerror(errno));
+	}
+
+	return result;
+}
+
+static int vfs_gpfs_filesystem_sharemode(vfs_handle_struct *handle,
+					 files_struct *fsp,
+					 uint32_t share_access,
+					 uint32_t access_mask)
+{
+
+	struct gpfs_config_data *config;
+	int ret = 0;
+
+	SMB_VFS_HANDLE_GET_DATA(handle, config,
+				struct gpfs_config_data,
+				return -1);
+
+	if(!config->sharemodes) {
+		return 0;
+	}
+
+	/*
+	 * A named stream fsp will have the basefile open in the fsp
+	 * fd, so lacking a distinct fd for the stream we have to skip
+	 * set_gpfs_sharemode for stream.
+	 */
+	if (fsp_is_alternate_stream(fsp)) {
+		DBG_NOTICE("Not requesting GPFS sharemode on stream: %s/%s\n",
+			   fsp->conn->connectpath,
+			   fsp_str_dbg(fsp));
+		return 0;
+	}
+
+	ret = set_gpfs_sharemode(fsp, access_mask, share_access);
+
+	return ret;
+}
+
+static int vfs_gpfs_close(vfs_handle_struct *handle, files_struct *fsp)
+{
+
+	struct gpfs_config_data *config;
+
+	SMB_VFS_HANDLE_GET_DATA(handle, config,
+				struct gpfs_config_data,
+				return -1);
+
+	if (config->sharemodes &&
+	    (fsp->fsp_flags.kernel_share_modes_taken))
+	{
+		/*
+		 * Always clear GPFS sharemode in case the actual
+		 * close gets deferred due to outstanding POSIX locks
+		 * (see fd_close_posix)
+		 */
+		int ret = gpfswrap_set_share(fsp_get_io_fd(fsp), 0, 0);
+		if (ret != 0) {
+			DBG_ERR("Clearing GPFS sharemode on close failed for "
+				" %s/%s: %s\n",
+				fsp->conn->connectpath,
+				fsp->fsp_name->base_name,
+				strerror(errno));
+		}
+	}
+
+	return SMB_VFS_NEXT_CLOSE(handle, fsp);
+}
+
+#ifdef HAVE_KERNEL_OPLOCKS_LINUX
+static int lease_type_to_gpfs(int leasetype)
+{
+	if (leasetype == F_RDLCK) {
+		return GPFS_LEASE_READ;
+	}
+
+	if (leasetype == F_WRLCK) {
+		return GPFS_LEASE_WRITE;
+	}
+
+	return GPFS_LEASE_NONE;
+}
+
+static int vfs_gpfs_setlease(vfs_handle_struct *handle,
+			     files_struct *fsp,
+			     int leasetype)
+{
+	struct gpfs_config_data *config;
+	int ret=0;
+
+	START_PROFILE(syscall_linux_setlease);
+
+	SMB_VFS_HANDLE_GET_DATA(handle, config,
+				struct gpfs_config_data,
+				return -1);
+
+	ret = linux_set_lease_sighandler(fsp_get_io_fd(fsp));
+	if (ret == -1) {
+		goto failure;
+	}
+
+	if (config->leases) {
+		int gpfs_lease_type = lease_type_to_gpfs(leasetype);
+		int saved_errno = 0;
+
+		/*
+		 * Ensure the lease owner is root to allow
+		 * correct delivery of lease-break signals.
+		 */
+		become_root();
+		ret = gpfswrap_set_lease(fsp_get_io_fd(fsp), gpfs_lease_type);
+		if (ret < 0) {
+			saved_errno = errno;
+		}
+		unbecome_root();
+
+		if (saved_errno != 0) {
+			errno = saved_errno;
+		}
+	}
+
+failure:
+	END_PROFILE(syscall_linux_setlease);
+
+	return ret;
+}
+
+#else /* HAVE_KERNEL_OPLOCKS_LINUX */
+
+static int vfs_gpfs_setlease(vfs_handle_struct *handle,
+				files_struct *fsp,
+				int leasetype)
+{
+	return ENOSYS;
+}
+#endif /* HAVE_KERNEL_OPLOCKS_LINUX */
+
+static NTSTATUS vfs_gpfs_get_real_filename_at(struct vfs_handle_struct *handle,
+					      struct files_struct *dirfsp,
+					      const char *name,
+					      TALLOC_CTX *mem_ctx,
+					      char **found_name)
+{
+	int result;
+	char *full_path = NULL;
+	char *to_free = NULL;
+	char real_pathname[PATH_MAX+1], tmpbuf[PATH_MAX];
+	size_t full_path_len;
+	int buflen;
+	bool mangled;
+	struct gpfs_config_data *config;
+
+	SMB_VFS_HANDLE_GET_DATA(handle, config,
+				struct gpfs_config_data,
+				return NT_STATUS_INTERNAL_ERROR);
+
+	if (!config->getrealfilename) {
+		return SMB_VFS_NEXT_GET_REAL_FILENAME_AT(
+			handle, dirfsp, name, mem_ctx, found_name);
+	}
+
+	mangled = mangle_is_mangled(name, handle->conn->params);
+	if (mangled) {
+		return SMB_VFS_NEXT_GET_REAL_FILENAME_AT(
+			handle, dirfsp, name, mem_ctx, found_name);
+	}
+
+	full_path_len = full_path_tos(dirfsp->fsp_name->base_name, name,
+				      tmpbuf, sizeof(tmpbuf),
+				      &full_path, &to_free);
+	if (full_path_len == -1) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	buflen = sizeof(real_pathname) - 1;
+
+	result = gpfswrap_get_realfilename_path(full_path, real_pathname,
+						&buflen);
+
+	TALLOC_FREE(to_free);
+
+	if ((result == -1) && (errno == ENOSYS)) {
+		return SMB_VFS_NEXT_GET_REAL_FILENAME_AT(
+			handle, dirfsp, name, mem_ctx, found_name);
+	}
+
+	if (result == -1) {
+		DEBUG(10, ("smbd_gpfs_get_realfilename_path returned %s\n",
+			   strerror(errno)));
+		return map_nt_error_from_unix(errno);
+	}
+
+	/*
+	 * GPFS does not necessarily null-terminate the returned path
+	 * but instead returns the buffer length in buflen.
+	 */
+
+	if (buflen < sizeof(real_pathname)) {
+		real_pathname[buflen] = '\0';
+	} else {
+		real_pathname[sizeof(real_pathname)-1] = '\0';
+	}
+
+	DBG_DEBUG("%s/%s -> %s\n",
+		  fsp_str_dbg(dirfsp),
+		  name,
+		  real_pathname);
+
+	name = strrchr_m(real_pathname, '/');
+	if (name == NULL) {
+		return NT_STATUS_OBJECT_NAME_NOT_FOUND;
+	}
+
+	*found_name = talloc_strdup(mem_ctx, name+1);
+	if (*found_name == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	return NT_STATUS_OK;
+}
+
+static void sd2gpfs_control(uint16_t control, struct gpfs_acl *gacl)
+{
+	unsigned int gpfs_aclflags = 0;
+	control &= SEC_DESC_DACL_PROTECTED | SEC_DESC_SACL_PROTECTED |
+		SEC_DESC_DACL_AUTO_INHERITED | SEC_DESC_SACL_AUTO_INHERITED |
+		SEC_DESC_DACL_DEFAULTED | SEC_DESC_SACL_DEFAULTED |
+		SEC_DESC_DACL_PRESENT | SEC_DESC_SACL_PRESENT;
+	gpfs_aclflags = control << 8;
+	if (!(control & SEC_DESC_DACL_PRESENT))
+		gpfs_aclflags |= ACL4_FLAG_NULL_DACL;
+	if (!(control & SEC_DESC_SACL_PRESENT))
+		gpfs_aclflags |= ACL4_FLAG_NULL_SACL;
+	gacl->acl_level = GPFS_ACL_LEVEL_V4FLAGS;
+	gacl->v4Level1.acl_flags = gpfs_aclflags;
+}
+
+static uint16_t gpfs2sd_control(unsigned int gpfs_aclflags)
+{
+	uint16_t control = gpfs_aclflags >> 8;
+	control &= SEC_DESC_DACL_PROTECTED | SEC_DESC_SACL_PROTECTED |
+		SEC_DESC_DACL_AUTO_INHERITED | SEC_DESC_SACL_AUTO_INHERITED |
+		SEC_DESC_DACL_DEFAULTED | SEC_DESC_SACL_DEFAULTED |
+		SEC_DESC_DACL_PRESENT | SEC_DESC_SACL_PRESENT;
+	control |= SEC_DESC_SELF_RELATIVE;
+	return control;
+}
+
+static void gpfs_dumpacl(int level, struct gpfs_acl *gacl)
+{
+	gpfs_aclCount_t i;
+	if (gacl==NULL)
+	{
+		DEBUG(0, ("gpfs acl is NULL\n"));
+		return;
+	}
+
+	DEBUG(level, ("len: %d, level: %d, version: %d, nace: %d, "
+		      "control: %x\n",
+		      gacl->acl_len, gacl->acl_level, gacl->acl_version,
+		      gacl->acl_nace, gpfs_acl_flags(gacl)));
+
+	for(i=0; i<gacl->acl_nace; i++)
+	{
+		struct gpfs_ace_v4 *gace = gpfs_ace_ptr(gacl, i);
+		DEBUG(level, ("\tace[%d]: type:%d, flags:0x%x, mask:0x%x, "
+			      "iflags:0x%x, who:%u\n",
+			      i, gace->aceType, gace->aceFlags, gace->aceMask,
+			      gace->aceIFlags, gace->aceWho));
+	}
+}
+
+static int gpfs_getacl_with_capability(struct files_struct *fsp,
+				       int flags,
+				       void *buf)
+{
+	int ret, saved_errno;
+
+	set_effective_capability(DAC_OVERRIDE_CAPABILITY);
+
+	ret = gpfswrap_fgetacl(fsp_get_pathref_fd(fsp), flags, buf);
+	saved_errno = errno;
+
+	drop_effective_capability(DAC_OVERRIDE_CAPABILITY);
+
+	errno = saved_errno;
+	return ret;
+}
+
+/*
+ * get the ACL from GPFS, allocated on the specified mem_ctx
+ * internally retries when initial buffer was too small
+ *
+ * caller needs to cast result to either
+ * raw = yes: struct gpfs_opaque_acl
+ * raw = no: struct gpfs_acl
+ *
+ */
+static void *vfs_gpfs_getacl(TALLOC_CTX *mem_ctx,
+			 struct files_struct *fsp,
+			 const bool raw,
+			 const gpfs_aclType_t type)
+{
+	const char *fname = fsp->fsp_name->base_name;
+	void *aclbuf;
+	size_t size = 512;
+	int ret, flags;
+	unsigned int *len;
+	size_t struct_size;
+	bool use_capability = false;
+
+again:
+
+	aclbuf = talloc_zero_size(mem_ctx, size);
+	if (aclbuf == NULL) {
+		errno = ENOMEM;
+		return NULL;
+	}
+
+	if (raw) {
+		struct gpfs_opaque_acl *buf = (struct gpfs_opaque_acl *) aclbuf;
+		buf->acl_type = type;
+		flags = GPFS_GETACL_NATIVE;
+		len = (unsigned int *) &(buf->acl_buffer_len);
+		struct_size = sizeof(struct gpfs_opaque_acl);
+	} else {
+		struct gpfs_acl *buf = (struct gpfs_acl *) aclbuf;
+		buf->acl_type = type;
+		buf->acl_level = GPFS_ACL_LEVEL_V4FLAGS;
+		flags = GPFS_GETACL_STRUCT;
+		len = &(buf->acl_len);
+		/* reserve space for control flags in gpfs 3.5 and beyond */
+		struct_size = sizeof(struct gpfs_acl) + sizeof(unsigned int);
+	}
+
+	/* set the length of the buffer as input value */
+	*len = size;
+
+	if (use_capability) {
+		ret = gpfs_getacl_with_capability(fsp, flags, aclbuf);
+	} else {
+		ret = gpfswrap_fgetacl(fsp_get_pathref_fd(fsp), flags, aclbuf);
+		if ((ret != 0) && (errno == EACCES)) {
+			DBG_DEBUG("Retry with DAC capability for %s\n", fname);
+			use_capability = true;
+			ret = gpfs_getacl_with_capability(fsp, flags, aclbuf);
+		}
+	}
+
+	if ((ret != 0) && (errno == ENOSPC)) {
+		/*
+		 * get the size needed to accommodate the complete buffer
+		 *
+		 * the value returned only applies to the ACL blob in the
+		 * struct so make sure to also have headroom for the first
+		 * struct members by adding room for the complete struct
+		 * (might be a few bytes too much then)
+		 */
+		size = *len + struct_size;
+		talloc_free(aclbuf);
+		DEBUG(10, ("Increasing ACL buffer size to %zu\n", size));
+		goto again;
+	}
+
+	if (ret != 0) {
+		DEBUG(5, ("smbd_gpfs_getacl failed with %s\n",
+			  strerror(errno)));
+		talloc_free(aclbuf);
+		return NULL;
+	}
+
+	return aclbuf;
+}
+
+/* Tries to get nfs4 acls and returns SMB ACL allocated.
+ * On failure returns 1 if it got non-NFSv4 ACL to prompt 
+ * retry with POSIX ACL checks.
+ * On failure returns -1 if there is system (GPFS) error, check errno.
+ * Returns 0 on success
+ */
+static int gpfs_get_nfs4_acl(TALLOC_CTX *mem_ctx,
+			     struct files_struct *fsp,
+			     struct SMB4ACL_T **ppacl)
+{
+	const char *fname = fsp->fsp_name->base_name;
+	gpfs_aclCount_t i;
+	struct gpfs_acl *gacl = NULL;
+	DEBUG(10, ("gpfs_get_nfs4_acl invoked for %s\n", fname));
+
+	/* Get the ACL */
+	gacl = (struct gpfs_acl*) vfs_gpfs_getacl(talloc_tos(), fsp,
+						  false, 0);
+	if (gacl == NULL) {
+		DEBUG(9, ("gpfs_getacl failed for %s with %s\n",
+			   fname, strerror(errno)));
+		if (errno == ENODATA) {
+			/*
+			 * GPFS returns ENODATA for snapshot
+			 * directories. Retry with POSIX ACLs check.
+			 */
+			return 1;
+		}
+
+		return -1;
+	}
+
+	if (gacl->acl_type != GPFS_ACL_TYPE_NFS4) {
+		DEBUG(10, ("Got non-nfsv4 acl\n"));
+		/* Retry with POSIX ACLs check */
+		talloc_free(gacl);
+		return 1;
+	}
+
+	*ppacl = smb_create_smb4acl(mem_ctx);
+
+	if (gacl->acl_level == GPFS_ACL_LEVEL_V4FLAGS) {
+		uint16_t control = gpfs2sd_control(gpfs_acl_flags(gacl));
+		smbacl4_set_controlflags(*ppacl, control);
+	}
+
+	DEBUG(10, ("len: %d, level: %d, version: %d, nace: %d, control: %x\n",
+		   gacl->acl_len, gacl->acl_level, gacl->acl_version,
+		   gacl->acl_nace, gpfs_acl_flags(gacl)));
+
+	for (i=0; i<gacl->acl_nace; i++) {
+		struct gpfs_ace_v4 *gace = gpfs_ace_ptr(gacl, i);
+		SMB_ACE4PROP_T smbace = { 0 };
+		DEBUG(10, ("type: %d, iflags: %x, flags: %x, mask: %x, "
+			   "who: %d\n", gace->aceType, gace->aceIFlags,
+			   gace->aceFlags, gace->aceMask, gace->aceWho));
+
+		if (gace->aceIFlags & ACE4_IFLAG_SPECIAL_ID) {
+			smbace.flags |= SMB_ACE4_ID_SPECIAL;
+			switch (gace->aceWho) {
+			case ACE4_SPECIAL_OWNER:
+				smbace.who.special_id = SMB_ACE4_WHO_OWNER;
+				break;
+			case ACE4_SPECIAL_GROUP:
+				smbace.who.special_id = SMB_ACE4_WHO_GROUP;
+				break;
+			case ACE4_SPECIAL_EVERYONE:
+				smbace.who.special_id = SMB_ACE4_WHO_EVERYONE;
+				break;
+			default:
+				DEBUG(8, ("invalid special gpfs id %d "
+					  "ignored\n", gace->aceWho));
+				continue; /* don't add it */
+			}
+		} else {
+			if (gace->aceFlags & ACE4_FLAG_GROUP_ID)
+				smbace.who.gid = gace->aceWho;
+			else
+				smbace.who.uid = gace->aceWho;
+		}
+
+		/* remove redundant deny entries */
+		if (i > 0 && gace->aceType == SMB_ACE4_ACCESS_DENIED_ACE_TYPE) {
+			struct gpfs_ace_v4 *prev = gpfs_ace_ptr(gacl, i - 1);
+			if (prev->aceType == SMB_ACE4_ACCESS_ALLOWED_ACE_TYPE &&
+			    prev->aceFlags == gace->aceFlags &&
+			    prev->aceIFlags == gace->aceIFlags &&
+			    (gace->aceMask & prev->aceMask) == 0 &&
+			    gace->aceWho == prev->aceWho) {
+				/* it's redundant - skip it */
+				continue;
+			}
+		}
+
+		smbace.aceType = gace->aceType;
+		smbace.aceFlags = gace->aceFlags;
+		smbace.aceMask = gace->aceMask;
+		smb_add_ace4(*ppacl, &smbace);
+	}
+
+	talloc_free(gacl);
+
+	return 0;
+}
+
+static NTSTATUS gpfsacl_fget_nt_acl(vfs_handle_struct *handle,
+	files_struct *fsp, uint32_t security_info,
+	TALLOC_CTX *mem_ctx,
+	struct security_descriptor **ppdesc)
+{
+	struct SMB4ACL_T *pacl = NULL;
+	int	result;
+	struct gpfs_config_data *config;
+	TALLOC_CTX *frame = talloc_stackframe();
+	NTSTATUS status;
+
+	*ppdesc = NULL;
+
+	SMB_VFS_HANDLE_GET_DATA(handle, config,
+				struct gpfs_config_data,
+				return NT_STATUS_INTERNAL_ERROR);
+
+	if (!config->acl) {
+		status = SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp, security_info,
+						  mem_ctx, ppdesc);
+		TALLOC_FREE(frame);
+		return status;
+	}
+
+	result = gpfs_get_nfs4_acl(frame, fsp, &pacl);
+
+	if (result == 0) {
+		status = smb_fget_nt_acl_nfs4(fsp, &config->nfs4_params,
+					      security_info,
+					      mem_ctx, ppdesc, pacl);
+		TALLOC_FREE(frame);
+		return status;
+	}
+
+	if (result > 0) {
+		DEBUG(10, ("retrying with posix acl...\n"));
+		status = posix_fget_nt_acl(fsp, security_info,
+					   mem_ctx, ppdesc);
+		TALLOC_FREE(frame);
+		return status;
+	}
+
+	TALLOC_FREE(frame);
+
+	/* GPFS ACL was not read, something wrong happened, error code is set in errno */
+	return map_nt_error_from_unix(errno);
+}
+
+static bool vfs_gpfs_nfs4_ace_to_gpfs_ace(SMB_ACE4PROP_T *nfs4_ace,
+					  struct gpfs_ace_v4 *gace,
+					  uid_t owner_uid)
+{
+	gace->aceType = nfs4_ace->aceType;
+	gace->aceFlags = nfs4_ace->aceFlags;
+	gace->aceMask = nfs4_ace->aceMask;
+
+	if (nfs4_ace->flags & SMB_ACE4_ID_SPECIAL) {
+		switch(nfs4_ace->who.special_id) {
+		case SMB_ACE4_WHO_EVERYONE:
+			gace->aceIFlags = ACE4_IFLAG_SPECIAL_ID;
+			gace->aceWho = ACE4_SPECIAL_EVERYONE;
+			break;
+		case SMB_ACE4_WHO_OWNER:
+			/*
+			 * With GPFS it is not possible to deny ACL or
+			 * attribute access to the owner. Setting an
+			 * ACL with such an entry is not possible.
+			 * Denying ACL or attribute access for the
+			 * owner through a named ACL entry can be
+			 * stored in an ACL, it is just not effective.
+			 *
+			 * Map this case to a named entry to allow at
+			 * least setting this ACL, which will be
+			 * enforced by the smbd permission check. Do
+			 * not do this for an inheriting OWNER entry,
+			 * as this represents a CREATOR OWNER ACE. The
+			 * remaining limitation is that CREATOR OWNER
+			 * cannot deny ACL or attribute access.
+			 */
+			if (!nfs_ace_is_inherit(nfs4_ace) &&
+			    nfs4_ace->aceType ==
+					SMB_ACE4_ACCESS_DENIED_ACE_TYPE &&
+			    nfs4_ace->aceMask & (SMB_ACE4_READ_ATTRIBUTES|
+						 SMB_ACE4_WRITE_ATTRIBUTES|
+						 SMB_ACE4_READ_ACL|
+						 SMB_ACE4_WRITE_ACL)) {
+				gace->aceIFlags = 0;
+				gace->aceWho = owner_uid;
+			} else {
+				gace->aceIFlags = ACE4_IFLAG_SPECIAL_ID;
+				gace->aceWho = ACE4_SPECIAL_OWNER;
+			}
+			break;
+		case SMB_ACE4_WHO_GROUP:
+			gace->aceIFlags = ACE4_IFLAG_SPECIAL_ID;
+			gace->aceWho = ACE4_SPECIAL_GROUP;
+			break;
+		default:
+			DBG_WARNING("Unsupported special_id %d\n",
+				    nfs4_ace->who.special_id);
+			return false;
+		}
+
+		return true;
+	}
+
+	gace->aceIFlags = 0;
+	gace->aceWho = (nfs4_ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP) ?
+		nfs4_ace->who.gid : nfs4_ace->who.uid;
+
+	return true;
+}
+
+static struct gpfs_acl *vfs_gpfs_smbacl2gpfsacl(TALLOC_CTX *mem_ctx,
+						files_struct *fsp,
+						struct SMB4ACL_T *smbacl,
+						bool controlflags)
+{
+	struct gpfs_acl *gacl;
+	gpfs_aclLen_t gacl_len;
+	struct SMB4ACE_T *smbace;
+
+	gacl_len = offsetof(gpfs_acl_t, ace_v4) + sizeof(unsigned int)
+		+ smb_get_naces(smbacl) * sizeof(gpfs_ace_v4_t);
+
+	gacl = (struct gpfs_acl *)TALLOC_SIZE(mem_ctx, gacl_len);
+	if (gacl == NULL) {
+		DEBUG(0, ("talloc failed\n"));
+		errno = ENOMEM;
+		return NULL;
+	}
+
+	gacl->acl_level = GPFS_ACL_LEVEL_BASE;
+	gacl->acl_version = GPFS_ACL_VERSION_NFS4;
+	gacl->acl_type = GPFS_ACL_TYPE_NFS4;
+	gacl->acl_nace = 0; /* change later... */
+
+	if (controlflags) {
+		gacl->acl_level = GPFS_ACL_LEVEL_V4FLAGS;
+		sd2gpfs_control(smbacl4_get_controlflags(smbacl), gacl);
+	}
+
+	for (smbace=smb_first_ace4(smbacl); smbace!=NULL; smbace = smb_next_ace4(smbace)) {
+		struct gpfs_ace_v4 *gace = gpfs_ace_ptr(gacl, gacl->acl_nace);
+		SMB_ACE4PROP_T	*aceprop = smb_get_ace4(smbace);
+		bool add_ace;
+
+		add_ace = vfs_gpfs_nfs4_ace_to_gpfs_ace(aceprop, gace,
+							fsp->fsp_name->st.st_ex_uid);
+		if (!add_ace) {
+			continue;
+		}
+
+		gacl->acl_nace++;
+	}
+	gacl->acl_len = (char *)gpfs_ace_ptr(gacl, gacl->acl_nace)
+		- (char *)gacl;
+	return gacl;
+}
+
+static bool gpfsacl_process_smbacl(vfs_handle_struct *handle,
+				   files_struct *fsp,
+				   struct SMB4ACL_T *smbacl)
+{
+	int ret;
+	struct gpfs_acl *gacl;
+	TALLOC_CTX *mem_ctx = talloc_tos();
+
+	gacl = vfs_gpfs_smbacl2gpfsacl(mem_ctx, fsp, smbacl, true);
+	if (gacl == NULL) { /* out of memory */
+		return False;
+	}
+	ret = gpfswrap_putacl(fsp->fsp_name->base_name,
+			      GPFS_PUTACL_STRUCT | GPFS_ACL_SAMBA, gacl);
+
+	if ((ret != 0) && (errno == EINVAL)) {
+		DEBUG(10, ("Retry without nfs41 control flags\n"));
+		talloc_free(gacl);
+		gacl = vfs_gpfs_smbacl2gpfsacl(mem_ctx, fsp, smbacl, false);
+		if (gacl == NULL) { /* out of memory */
+			return False;
+		}
+		ret = gpfswrap_putacl(fsp->fsp_name->base_name,
+				      GPFS_PUTACL_STRUCT | GPFS_ACL_SAMBA,
+				      gacl);
+	}
+
+	if (ret != 0) {
+		DEBUG(8, ("gpfs_putacl failed with %s\n", strerror(errno)));
+		gpfs_dumpacl(8, gacl);
+		return False;
+	}
+
+	DEBUG(10, ("gpfs_putacl succeeded\n"));
+	return True;
+}
+
+static NTSTATUS gpfsacl_set_nt_acl_internal(vfs_handle_struct *handle, files_struct *fsp, uint32_t security_info_sent, const struct security_descriptor *psd)
+{
+	struct gpfs_acl *acl;
+	NTSTATUS result = NT_STATUS_ACCESS_DENIED;
+
+	acl = (struct gpfs_acl*) vfs_gpfs_getacl(talloc_tos(),
+						 fsp,
+						 false, 0);
+	if (acl == NULL) {
+		return map_nt_error_from_unix(errno);
+	}
+
+	if (acl->acl_version == GPFS_ACL_VERSION_NFS4) {
+		struct gpfs_config_data *config;
+
+		SMB_VFS_HANDLE_GET_DATA(handle, config,
+					struct gpfs_config_data,
+					return NT_STATUS_INTERNAL_ERROR);
+
+		result = smb_set_nt_acl_nfs4(handle,
+			fsp, &config->nfs4_params, security_info_sent, psd,
+			gpfsacl_process_smbacl);
+	} else { /* assume POSIX ACL - by default... */
+		result = set_nt_acl(fsp, security_info_sent, psd);
+	}
+
+	talloc_free(acl);
+	return result;
+}
+
+static NTSTATUS gpfsacl_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp, uint32_t security_info_sent, const struct security_descriptor *psd)
+{
+	struct gpfs_config_data *config;
+
+	SMB_VFS_HANDLE_GET_DATA(handle, config,
+				struct gpfs_config_data,
+				return NT_STATUS_INTERNAL_ERROR);
+
+	if (!config->acl) {
+		return SMB_VFS_NEXT_FSET_NT_ACL(handle, fsp, security_info_sent, psd);
+	}
+
+	return gpfsacl_set_nt_acl_internal(handle, fsp, security_info_sent, psd);
+}
+
+static SMB_ACL_T gpfs2smb_acl(const struct gpfs_acl *pacl, TALLOC_CTX *mem_ctx)
+{
+	SMB_ACL_T result;
+	gpfs_aclCount_t i;
+
+	result = sys_acl_init(mem_ctx);
+	if (result == NULL) {
+		errno = ENOMEM;
+		return NULL;
+	}
+
+	result->count = pacl->acl_nace;
+	result->acl = talloc_realloc(result, result->acl, struct smb_acl_entry,
+				     result->count);
+	if (result->acl == NULL) {
+		TALLOC_FREE(result);
+		errno = ENOMEM;
+		return NULL;
+	}
+
+	for (i=0; i<pacl->acl_nace; i++) {
+		struct smb_acl_entry *ace = &result->acl[i];
+		const struct gpfs_ace_v1 *g_ace = &pacl->ace_v1[i];
+
+		DEBUG(10, ("Converting type %d id %lu perm %x\n",
+			   (int)g_ace->ace_type, (unsigned long)g_ace->ace_who,
+			   (int)g_ace->ace_perm));
+
+		switch (g_ace->ace_type) {
+		case GPFS_ACL_USER:
+			ace->a_type = SMB_ACL_USER;
+			ace->info.user.uid = (uid_t)g_ace->ace_who;
+			break;
+		case GPFS_ACL_USER_OBJ:
+			ace->a_type = SMB_ACL_USER_OBJ;
+			break;
+		case GPFS_ACL_GROUP:
+			ace->a_type = SMB_ACL_GROUP;
+			ace->info.group.gid = (gid_t)g_ace->ace_who;
+			break;
+		case GPFS_ACL_GROUP_OBJ:
+ 			ace->a_type = SMB_ACL_GROUP_OBJ;
+			break;
+		case GPFS_ACL_OTHER:
+			ace->a_type = SMB_ACL_OTHER;
+			break;
+		case GPFS_ACL_MASK:
+			ace->a_type = SMB_ACL_MASK;
+			break;
+		default:
+			DEBUG(10, ("Got invalid ace_type: %d\n",
+				   g_ace->ace_type));
+			TALLOC_FREE(result);
+			errno = EINVAL;
+			return NULL;
+		}
+
+		ace->a_perm = 0;
+		ace->a_perm |= (g_ace->ace_perm & ACL_PERM_READ) ?
+			SMB_ACL_READ : 0;
+		ace->a_perm |= (g_ace->ace_perm & ACL_PERM_WRITE) ?
+			SMB_ACL_WRITE : 0;
+		ace->a_perm |= (g_ace->ace_perm & ACL_PERM_EXECUTE) ?
+			SMB_ACL_EXECUTE : 0;
+
+		DEBUGADD(10, ("Converted to %d perm %x\n",
+			      ace->a_type, ace->a_perm));
+	}
+
+	return result;
+}
+
+static SMB_ACL_T gpfsacl_get_posix_acl(struct files_struct *fsp,
+				       gpfs_aclType_t type,
+				       TALLOC_CTX *mem_ctx)
+{
+	struct gpfs_acl *pacl;
+	SMB_ACL_T result = NULL;
+
+	pacl = vfs_gpfs_getacl(talloc_tos(), fsp, false, type);
+
+	if (pacl == NULL) {
+		DBG_DEBUG("vfs_gpfs_getacl failed for %s with %s\n",
+			   fsp_str_dbg(fsp), strerror(errno));
+		if (errno == 0) {
+			errno = EINVAL;
+		}
+		goto done;
+	}
+
+	if (pacl->acl_version != GPFS_ACL_VERSION_POSIX) {
+		DEBUG(10, ("Got acl version %d, expected %d\n",
+			   pacl->acl_version, GPFS_ACL_VERSION_POSIX));
+		errno = EINVAL;
+		goto done;
+	}
+
+	DEBUG(10, ("len: %d, level: %d, version: %d, nace: %d\n",
+		   pacl->acl_len, pacl->acl_level, pacl->acl_version,
+		   pacl->acl_nace));
+
+	result = gpfs2smb_acl(pacl, mem_ctx);
+	if (result != NULL) {
+		errno = 0;
+	}
+
+ done:
+
+	if (pacl != NULL) {
+		talloc_free(pacl);
+	}
+	if (errno != 0) {
+		TALLOC_FREE(result);
+	}
+	return result;
+}
+
+static SMB_ACL_T gpfsacl_sys_acl_get_fd(vfs_handle_struct *handle,
+					files_struct *fsp,
+					SMB_ACL_TYPE_T type,
+					TALLOC_CTX *mem_ctx)
+{
+	gpfs_aclType_t gpfs_type;
+	struct gpfs_config_data *config;
+
+	SMB_VFS_HANDLE_GET_DATA(handle, config,
+				struct gpfs_config_data,
+				return NULL);
+
+	if (!config->acl) {
+		return SMB_VFS_NEXT_SYS_ACL_GET_FD(handle, fsp, type, mem_ctx);
+	}
+
+	switch(type) {
+	case SMB_ACL_TYPE_ACCESS:
+		gpfs_type = GPFS_ACL_TYPE_ACCESS;
+		break;
+	case SMB_ACL_TYPE_DEFAULT:
+		gpfs_type = GPFS_ACL_TYPE_DEFAULT;
+		break;
+	default:
+		DEBUG(0, ("Got invalid type: %d\n", type));
+		smb_panic("exiting");
+	}
+	return gpfsacl_get_posix_acl(fsp, gpfs_type, mem_ctx);
+}
+
+static int gpfsacl_sys_acl_blob_get_fd(vfs_handle_struct *handle,
+				      files_struct *fsp,
+				      TALLOC_CTX *mem_ctx,
+				      char **blob_description,
+				      DATA_BLOB *blob)
+{
+	struct gpfs_config_data *config;
+	struct gpfs_opaque_acl *acl = NULL;
+	DATA_BLOB aclblob;
+	int result;
+
+	SMB_VFS_HANDLE_GET_DATA(handle, config,
+				struct gpfs_config_data,
+				return -1);
+
+	if (!config->acl) {
+		return SMB_VFS_NEXT_SYS_ACL_BLOB_GET_FD(handle, fsp, mem_ctx,
+							blob_description, blob);
+	}
+
+	errno = 0;
+	acl = (struct gpfs_opaque_acl *) vfs_gpfs_getacl(mem_ctx,
+						fsp,
+						true,
+						GPFS_ACL_TYPE_NFS4);
+
+	if (errno) {
+		DEBUG(5, ("vfs_gpfs_getacl finished with errno %d: %s\n",
+					errno, strerror(errno)));
+
+		/* EINVAL means POSIX ACL, bail out on other cases */
+		if (errno != EINVAL) {
+			return -1;
+		}
+	}
+
+	if (acl != NULL) {
+		/*
+		 * file has NFSv4 ACL
+		 *
+		 * we only need the actual ACL blob here
+		 * acl_version will always be NFS4 because we asked
+		 * for NFS4
+		 * acl_type is only used for POSIX ACLs
+		 */
+		aclblob.data = (uint8_t*) acl->acl_var_data;
+		aclblob.length = acl->acl_buffer_len;
+
+		*blob_description = talloc_strdup(mem_ctx, "gpfs_nfs4_acl");
+		if (!*blob_description) {
+			talloc_free(acl);
+			errno = ENOMEM;
+			return -1;
+		}
+
+		result = non_posix_sys_acl_blob_get_fd_helper(handle, fsp,
+							      aclblob, mem_ctx,
+							      blob);
+
+		talloc_free(acl);
+		return result;
+	}
+
+	/* fall back to POSIX ACL */
+	return posix_sys_acl_blob_get_fd(handle, fsp, mem_ctx,
+					 blob_description, blob);
+}
+
+static struct gpfs_acl *smb2gpfs_acl(const SMB_ACL_T pacl,
+				     SMB_ACL_TYPE_T type)
+{
+	gpfs_aclLen_t len;
+	struct gpfs_acl *result;
+	int i;
+
+	DEBUG(10, ("smb2gpfs_acl: Got ACL with %d entries\n", pacl->count));
+
+	len = offsetof(gpfs_acl_t, ace_v1) + (pacl->count) *
+		sizeof(gpfs_ace_v1_t);
+
+	result = (struct gpfs_acl *)SMB_MALLOC(len);
+	if (result == NULL) {
+		errno = ENOMEM;
+		return result;
+	}
+
+	result->acl_len = len;
+	result->acl_level = 0;
+	result->acl_version = GPFS_ACL_VERSION_POSIX;
+	result->acl_type = (type == SMB_ACL_TYPE_DEFAULT) ?
+		GPFS_ACL_TYPE_DEFAULT : GPFS_ACL_TYPE_ACCESS;
+	result->acl_nace = pacl->count;
+
+	for (i=0; i<pacl->count; i++) {
+		const struct smb_acl_entry *ace = &pacl->acl[i];
+		struct gpfs_ace_v1 *g_ace = &result->ace_v1[i];
+
+		DEBUG(10, ("Converting type %d perm %x\n",
+			   (int)ace->a_type, (int)ace->a_perm));
+
+		g_ace->ace_perm = 0;
+
+		switch(ace->a_type) {
+		case SMB_ACL_USER:
+			g_ace->ace_type = GPFS_ACL_USER;
+			g_ace->ace_who = (gpfs_uid_t)ace->info.user.uid;
+			break;
+		case SMB_ACL_USER_OBJ:
+			g_ace->ace_type = GPFS_ACL_USER_OBJ;
+			g_ace->ace_perm |= ACL_PERM_CONTROL;
+			g_ace->ace_who = 0;
+			break;
+		case SMB_ACL_GROUP:
+			g_ace->ace_type = GPFS_ACL_GROUP;
+			g_ace->ace_who = (gpfs_uid_t)ace->info.group.gid;
+			break;
+		case SMB_ACL_GROUP_OBJ:
+			g_ace->ace_type = GPFS_ACL_GROUP_OBJ;
+			g_ace->ace_who = 0;
+			break;
+		case SMB_ACL_MASK:
+			g_ace->ace_type = GPFS_ACL_MASK;
+			g_ace->ace_perm = 0x8f;
+			g_ace->ace_who = 0;
+			break;
+		case SMB_ACL_OTHER:
+			g_ace->ace_type = GPFS_ACL_OTHER;
+			g_ace->ace_who = 0;
+			break;
+		default:
+			DEBUG(10, ("Got invalid ace_type: %d\n", ace->a_type));
+			errno = EINVAL;
+			SAFE_FREE(result);
+			return NULL;
+		}
+
+		g_ace->ace_perm |= (ace->a_perm & SMB_ACL_READ) ?
+			ACL_PERM_READ : 0;
+		g_ace->ace_perm |= (ace->a_perm & SMB_ACL_WRITE) ?
+			ACL_PERM_WRITE : 0;
+		g_ace->ace_perm |= (ace->a_perm & SMB_ACL_EXECUTE) ?
+			ACL_PERM_EXECUTE : 0;
+
+		DEBUGADD(10, ("Converted to %d id %d perm %x\n",
+			      g_ace->ace_type, g_ace->ace_who, g_ace->ace_perm));
+	}
+
+	return result;
+}
+
+static int gpfsacl_sys_acl_set_fd(vfs_handle_struct *handle,
+				  files_struct *fsp,
+				  SMB_ACL_TYPE_T type,
+				  SMB_ACL_T theacl)
+{
+	struct gpfs_config_data *config;
+	struct gpfs_acl *gpfs_acl = NULL;
+	int result;
+
+	SMB_VFS_HANDLE_GET_DATA(handle, config,
+				struct gpfs_config_data,
+				return -1);
+
+	if (!config->acl) {
+		return SMB_VFS_NEXT_SYS_ACL_SET_FD(handle, fsp, type, theacl);
+	}
+
+	gpfs_acl = smb2gpfs_acl(theacl, type);
+	if (gpfs_acl == NULL) {
+		return -1;
+	}
+
+	/*
+	 * This is no longer a handle based call.
+	 */
+	result = gpfswrap_putacl(fsp->fsp_name->base_name,
+				 GPFS_PUTACL_STRUCT|GPFS_ACL_SAMBA,
+				 gpfs_acl);
+	SAFE_FREE(gpfs_acl);
+	return result;
+}
+
+static int gpfsacl_sys_acl_delete_def_fd(vfs_handle_struct *handle,
+				files_struct *fsp)
+{
+	struct gpfs_config_data *config;
+
+	SMB_VFS_HANDLE_GET_DATA(handle, config,
+				struct gpfs_config_data,
+				return -1);
+
+	if (!config->acl) {
+		return SMB_VFS_NEXT_SYS_ACL_DELETE_DEF_FD(handle, fsp);
+	}
+
+	errno = ENOTSUP;
+	return -1;
+}
+
+
+/*
+ * Assumed: mode bits are shiftable and standard
+ * Output: the new aceMask field for an smb nfs4 ace
+ */
+static uint32_t gpfsacl_mask_filter(uint32_t aceType, uint32_t aceMask, uint32_t rwx)
+{
+	const uint32_t posix_nfs4map[3] = {
+                SMB_ACE4_EXECUTE, /* execute */
+		SMB_ACE4_WRITE_DATA | SMB_ACE4_APPEND_DATA, /* write; GPFS specific */
+                SMB_ACE4_READ_DATA /* read */
+	};
+	int     i;
+	uint32_t        posix_mask = 0x01;
+	uint32_t        posix_bit;
+	uint32_t        nfs4_bits;
+
+	for(i=0; i<3; i++) {
+		nfs4_bits = posix_nfs4map[i];
+		posix_bit = rwx & posix_mask;
+
+		if (aceType==SMB_ACE4_ACCESS_ALLOWED_ACE_TYPE) {
+			if (posix_bit)
+				aceMask |= nfs4_bits;
+			else
+				aceMask &= ~nfs4_bits;
+		} else {
+			/* add deny bits when suitable */
+			if (!posix_bit)
+				aceMask |= nfs4_bits;
+			else
+				aceMask &= ~nfs4_bits;
+		} /* other ace types are unexpected */
+
+		posix_mask <<= 1;
+	}
+
+	return aceMask;
+}
+
+static int gpfsacl_emu_chmod(vfs_handle_struct *handle,
+			     struct files_struct *fsp,
+			     mode_t mode)
+{
+	struct smb_filename *fname = fsp->fsp_name;
+	char *path = fsp->fsp_name->base_name;
+	struct SMB4ACL_T *pacl = NULL;
+	int     result;
+	bool    haveAllowEntry[SMB_ACE4_WHO_EVERYONE + 1] = {False, False, False, False};
+	int     i;
+	files_struct fake_fsp = { 0 }; /* TODO: rationalize parametrization */
+	struct SMB4ACE_T *smbace;
+	TALLOC_CTX *frame = talloc_stackframe();
+
+	DEBUG(10, ("gpfsacl_emu_chmod invoked for %s mode %o\n", path, mode));
+
+	result = gpfs_get_nfs4_acl(frame, fsp, &pacl);
+	if (result) {
+		TALLOC_FREE(frame);
+		return result;
+	}
+
+	if (mode & ~(S_IRWXU | S_IRWXG | S_IRWXO)) {
+		DEBUG(2, ("WARNING: cutting extra mode bits %o on %s\n", mode, path));
+	}
+
+	for (smbace=smb_first_ace4(pacl); smbace!=NULL; smbace = smb_next_ace4(smbace)) {
+		SMB_ACE4PROP_T  *ace = smb_get_ace4(smbace);
+		uint32_t        specid = ace->who.special_id;
+
+		if (ace->flags&SMB_ACE4_ID_SPECIAL &&
+		    ace->aceType<=SMB_ACE4_ACCESS_DENIED_ACE_TYPE &&
+		    specid <= SMB_ACE4_WHO_EVERYONE) {
+
+			uint32_t newMask;
+
+			if (ace->aceType==SMB_ACE4_ACCESS_ALLOWED_ACE_TYPE)
+				haveAllowEntry[specid] = True;
+
+			/* mode >> 6 for @owner, mode >> 3 for @group,
+			 * mode >> 0 for @everyone */
+			newMask = gpfsacl_mask_filter(ace->aceType, ace->aceMask,
+						      mode >> ((SMB_ACE4_WHO_EVERYONE - specid) * 3));
+			if (ace->aceMask!=newMask) {
+				DEBUG(10, ("ace changed for %s (%o -> %o) id=%d\n",
+					   path, ace->aceMask, newMask, specid));
+			}
+			ace->aceMask = newMask;
+		}
+	}
+
+	/* make sure we have at least ALLOW entries
+	 * for all the 3 special ids (@EVERYONE, @OWNER, @GROUP)
+	 * - if necessary
+	 */
+	for(i = SMB_ACE4_WHO_OWNER; i<=SMB_ACE4_WHO_EVERYONE; i++) {
+		SMB_ACE4PROP_T ace = { 0 };
+
+		if (haveAllowEntry[i]==True)
+			continue;
+
+		ace.aceType = SMB_ACE4_ACCESS_ALLOWED_ACE_TYPE;
+		ace.flags |= SMB_ACE4_ID_SPECIAL;
+		ace.who.special_id = i;
+
+		if (i==SMB_ACE4_WHO_GROUP) /* not sure it's necessary... */
+			ace.aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
+
+		ace.aceMask = gpfsacl_mask_filter(ace.aceType, ace.aceMask,
+						  mode >> ((SMB_ACE4_WHO_EVERYONE - i) * 3));
+
+		/* don't add unnecessary aces */
+		if (!ace.aceMask)
+			continue;
+
+		/* we add it to the END - as windows expects allow aces */
+		smb_add_ace4(pacl, &ace);
+		DEBUG(10, ("Added ALLOW ace for %s, mode=%o, id=%d, aceMask=%x\n",
+			   path, mode, i, ace.aceMask));
+	}
+
+	/* don't add complementary DENY ACEs here */
+	fake_fsp.fsp_name = synthetic_smb_fname(frame,
+						path,
+						NULL,
+						NULL,
+						fname->twrp,
+						0);
+	if (fake_fsp.fsp_name == NULL) {
+		errno = ENOMEM;
+		TALLOC_FREE(frame);
+		return -1;
+	}
+	/* put the acl */
+	if (gpfsacl_process_smbacl(handle, &fake_fsp, pacl) == False) {
+		TALLOC_FREE(frame);
+		return -1;
+	}
+
+	TALLOC_FREE(frame);
+	return 0; /* ok for [f]chmod */
+}
+
+static int vfs_gpfs_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
+{
+	SMB_STRUCT_STAT st;
+	int rc;
+
+	rc = SMB_VFS_NEXT_FSTAT(handle, fsp, &st);
+	if (rc != 0) {
+		return -1;
+	}
+
+	/* avoid chmod() if possible, to preserve acls */
+	if ((st.st_ex_mode & ~S_IFMT) == mode) {
+		return 0;
+	}
+
+	rc = gpfsacl_emu_chmod(handle, fsp, mode);
+	if (rc == 1) {
+		return SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
+	}
+	return rc;
+}
+
+static uint32_t vfs_gpfs_winattrs_to_dosmode(unsigned int winattrs)
+{
+	uint32_t dosmode = 0;
+
+	if (winattrs & GPFS_WINATTR_ARCHIVE){
+		dosmode |= FILE_ATTRIBUTE_ARCHIVE;
+	}
+	if (winattrs & GPFS_WINATTR_HIDDEN){
+		dosmode |= FILE_ATTRIBUTE_HIDDEN;
+	}
+	if (winattrs & GPFS_WINATTR_SYSTEM){
+		dosmode |= FILE_ATTRIBUTE_SYSTEM;
+	}
+	if (winattrs & GPFS_WINATTR_READONLY){
+		dosmode |= FILE_ATTRIBUTE_READONLY;
+	}
+	if (winattrs & GPFS_WINATTR_SPARSE_FILE) {
+		dosmode |= FILE_ATTRIBUTE_SPARSE;
+	}
+	if (winattrs & GPFS_WINATTR_OFFLINE) {
+		dosmode |= FILE_ATTRIBUTE_OFFLINE;
+	}
+
+	return dosmode;
+}
+
+static unsigned int vfs_gpfs_dosmode_to_winattrs(uint32_t dosmode)
+{
+	unsigned int winattrs = 0;
+
+	if (dosmode & FILE_ATTRIBUTE_ARCHIVE){
+		winattrs |= GPFS_WINATTR_ARCHIVE;
+	}
+	if (dosmode & FILE_ATTRIBUTE_HIDDEN){
+		winattrs |= GPFS_WINATTR_HIDDEN;
+	}
+	if (dosmode & FILE_ATTRIBUTE_SYSTEM){
+		winattrs |= GPFS_WINATTR_SYSTEM;
+	}
+	if (dosmode & FILE_ATTRIBUTE_READONLY){
+		winattrs |= GPFS_WINATTR_READONLY;
+	}
+	if (dosmode & FILE_ATTRIBUTE_SPARSE) {
+		winattrs |= GPFS_WINATTR_SPARSE_FILE;
+	}
+	if (dosmode & FILE_ATTRIBUTE_OFFLINE) {
+		winattrs |= GPFS_WINATTR_OFFLINE;
+	}
+
+	return winattrs;
+}
+
+static struct timespec gpfs_timestruc64_to_timespec(struct gpfs_timestruc64 g)
+{
+	return (struct timespec) { .tv_sec = g.tv_sec, .tv_nsec = g.tv_nsec };
+}
+
+static NTSTATUS vfs_gpfs_fget_dos_attributes(struct vfs_handle_struct *handle,
+					     struct files_struct *fsp,
+					     uint32_t *dosmode)
+{
+	struct gpfs_config_data *config;
+	int fd = fsp_get_pathref_fd(fsp);
+	struct sys_proc_fd_path_buf buf;
+	const char *p = NULL;
+	struct gpfs_iattr64 iattr = { };
+	unsigned int litemask = 0;
+	struct timespec ts;
+	int ret;
+
+	SMB_VFS_HANDLE_GET_DATA(handle, config,
+				struct gpfs_config_data,
+				return NT_STATUS_INTERNAL_ERROR);
+
+	if (!config->winattr) {
+		return SMB_VFS_NEXT_FGET_DOS_ATTRIBUTES(handle, fsp, dosmode);
+	}
+
+	if (fsp->fsp_flags.is_pathref && !config->pathref_ok.gpfs_fstat_x) {
+		if (fsp->fsp_flags.have_proc_fds) {
+			p = sys_proc_fd_path(fd, &buf);
+		} else {
+			p = fsp->fsp_name->base_name;
+		}
+	}
+
+	if (p != NULL) {
+		ret = gpfswrap_stat_x(p, &litemask, &iattr, sizeof(iattr));
+	} else {
+		ret = gpfswrap_fstat_x(fd, &litemask, &iattr, sizeof(iattr));
+	}
+	if (ret == -1 && errno == ENOSYS) {
+		return SMB_VFS_NEXT_FGET_DOS_ATTRIBUTES(handle, fsp, dosmode);
+	}
+
+	if (ret == -1 && errno == EACCES) {
+		int saved_errno = 0;
+
+		/*
+		 * According to MS-FSA 2.1.5.1.2.1 "Algorithm to Check Access to
+		 * an Existing File" FILE_LIST_DIRECTORY on a directory implies
+		 * FILE_READ_ATTRIBUTES for directory entries. Being able to
+		 * open a file implies FILE_LIST_DIRECTORY.
+		 */
+
+		set_effective_capability(DAC_OVERRIDE_CAPABILITY);
+
+		if (p != NULL) {
+			ret = gpfswrap_stat_x(p,
+					      &litemask,
+					      &iattr,
+					      sizeof(iattr));
+		} else {
+			ret = gpfswrap_fstat_x(fd,
+					       &litemask,
+					       &iattr,
+					       sizeof(iattr));
+		}
+		if (ret == -1) {
+			saved_errno = errno;
+		}
+
+		drop_effective_capability(DAC_OVERRIDE_CAPABILITY);
+
+		if (saved_errno != 0) {
+			errno = saved_errno;
+		}
+	}
+
+	if (ret == -1) {
+		DBG_WARNING("Getting winattrs failed for %s: %s\n",
+			    fsp->fsp_name->base_name, strerror(errno));
+		return map_nt_error_from_unix(errno);
+	}
+
+	ts = gpfs_timestruc64_to_timespec(iattr.ia_createtime);
+
+	*dosmode |= vfs_gpfs_winattrs_to_dosmode(iattr.ia_winflags);
+	update_stat_ex_create_time(&fsp->fsp_name->st, ts);
+
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS vfs_gpfs_fset_dos_attributes(struct vfs_handle_struct *handle,
+					     struct files_struct *fsp,
+					     uint32_t dosmode)
+{
+	struct gpfs_config_data *config;
+	struct gpfs_winattr attrs = { };
+	int ret;
+
+	SMB_VFS_HANDLE_GET_DATA(handle, config,
+				struct gpfs_config_data,
+				return NT_STATUS_INTERNAL_ERROR);
+
+	if (!config->winattr) {
+		return SMB_VFS_NEXT_FSET_DOS_ATTRIBUTES(handle, fsp, dosmode);
+	}
+
+	attrs.winAttrs = vfs_gpfs_dosmode_to_winattrs(dosmode);
+
+	if (!fsp->fsp_flags.is_pathref) {
+		ret = gpfswrap_set_winattrs(fsp_get_io_fd(fsp),
+					    GPFS_WINATTR_SET_ATTRS, &attrs);
+		if (ret == -1) {
+			DBG_WARNING("Setting winattrs failed for %s: %s\n",
+				    fsp_str_dbg(fsp), strerror(errno));
+			return map_nt_error_from_unix(errno);
+		}
+		return NT_STATUS_OK;
+	}
+
+	if (fsp->fsp_flags.have_proc_fds) {
+		int fd = fsp_get_pathref_fd(fsp);
+		struct sys_proc_fd_path_buf buf;
+
+		ret = gpfswrap_set_winattrs_path(sys_proc_fd_path(fd, &buf),
+						 GPFS_WINATTR_SET_ATTRS,
+						 &attrs);
+		if (ret == -1) {
+			DBG_WARNING("Setting winattrs failed for "
+				    "[%s][%s]: %s\n",
+				    buf.buf,
+				    fsp_str_dbg(fsp),
+				    strerror(errno));
+			return map_nt_error_from_unix(errno);
+		}
+		return NT_STATUS_OK;
+	}
+
+	/*
+	 * This is no longer a handle based call.
+	 */
+	ret = gpfswrap_set_winattrs_path(fsp->fsp_name->base_name,
+					 GPFS_WINATTR_SET_ATTRS,
+					 &attrs);
+	if (ret == -1) {
+		DBG_WARNING("Setting winattrs failed for [%s]: %s\n",
+			    fsp_str_dbg(fsp), strerror(errno));
+		return map_nt_error_from_unix(errno);
+	}
+
+	return NT_STATUS_OK;
+}
+
+static int timespec_to_gpfs_time(
+	struct timespec ts, gpfs_timestruc_t *gt, int idx, int *flags)
+{
+	if (is_omit_timespec(&ts)) {
+		return 0;
+	}
+
+	if (ts.tv_sec < 0 || ts.tv_sec > UINT32_MAX) {
+		DBG_NOTICE("GPFS uses 32-bit unsigned timestamps "
+			   "and cannot handle %jd.\n",
+			   (intmax_t)ts.tv_sec);
+		errno = ERANGE;
+		return -1;
+	}
+
+	*flags |= 1 << idx;
+	gt[idx].tv_sec = ts.tv_sec;
+	gt[idx].tv_nsec = ts.tv_nsec;
+	DBG_DEBUG("Setting GPFS time %d, flags 0x%x\n", idx, *flags);
+
+	return 0;
+}
+
+static int smbd_gpfs_set_times(struct files_struct *fsp,
+			       struct smb_file_time *ft)
+{
+	gpfs_timestruc_t gpfs_times[4];
+	int flags = 0;
+	int rc;
+
+	ZERO_ARRAY(gpfs_times);
+	rc = timespec_to_gpfs_time(ft->atime, gpfs_times, 0, &flags);
+	if (rc != 0) {
+		return rc;
+	}
+
+	rc = timespec_to_gpfs_time(ft->mtime, gpfs_times, 1, &flags);
+	if (rc != 0) {
+		return rc;
+	}
+
+	/* No good mapping from LastChangeTime to ctime, not storing */
+	rc = timespec_to_gpfs_time(ft->create_time, gpfs_times, 3, &flags);
+	if (rc != 0) {
+		return rc;
+	}
+
+	if (!flags) {
+		DBG_DEBUG("nothing to do, return to avoid EINVAL\n");
+		return 0;
+	}
+
+	if (!fsp->fsp_flags.is_pathref) {
+		rc = gpfswrap_set_times(fsp_get_io_fd(fsp), flags, gpfs_times);
+		if (rc != 0) {
+			DBG_WARNING("gpfs_set_times(%s) failed: %s\n",
+				    fsp_str_dbg(fsp), strerror(errno));
+		}
+		return rc;
+	}
+
+
+	if (fsp->fsp_flags.have_proc_fds) {
+		int fd = fsp_get_pathref_fd(fsp);
+		struct sys_proc_fd_path_buf buf;
+
+		rc = gpfswrap_set_times_path(sys_proc_fd_path(fd, &buf),
+					     flags,
+					     gpfs_times);
+		if (rc != 0) {
+			DBG_WARNING("gpfs_set_times_path(%s,%s) failed: %s\n",
+				    fsp_str_dbg(fsp),
+				    buf.buf,
+				    strerror(errno));
+		}
+		return rc;
+	}
+
+	/*
+	 * This is no longer a handle based call.
+	 */
+
+	rc = gpfswrap_set_times_path(fsp->fsp_name->base_name,
+				     flags,
+				     gpfs_times);
+	if (rc != 0) {
+		DBG_WARNING("gpfs_set_times_path(%s) failed: %s\n",
+			    fsp_str_dbg(fsp), strerror(errno));
+	}
+	return rc;
+}
+
+static int vfs_gpfs_fntimes(struct vfs_handle_struct *handle,
+		files_struct *fsp,
+		struct smb_file_time *ft)
+{
+
+	struct gpfs_winattr attrs;
+	int ret;
+	struct gpfs_config_data *config;
+
+	SMB_VFS_HANDLE_GET_DATA(handle,
+				config,
+				struct gpfs_config_data,
+				return -1);
+
+	/* Try to use gpfs_set_times if it is enabled and available */
+	if (config->settimes) {
+		return smbd_gpfs_set_times(fsp, ft);
+	}
+
+	DBG_DEBUG("gpfs_set_times() not available or disabled, "
+		  "use ntimes and winattr\n");
+
+	ret = SMB_VFS_NEXT_FNTIMES(handle, fsp, ft);
+	if (ret == -1) {
+		/* don't complain if access was denied */
+		if (errno != EPERM && errno != EACCES) {
+			DBG_WARNING("SMB_VFS_NEXT_FNTIMES failed: %s\n",
+				    strerror(errno));
+		}
+		return -1;
+	}
+
+	if (is_omit_timespec(&ft->create_time)) {
+		DBG_DEBUG("Create Time is NULL\n");
+		return 0;
+	}
+
+	if (!config->winattr) {
+		return 0;
+	}
+
+	attrs.winAttrs = 0;
+	attrs.creationTime.tv_sec = ft->create_time.tv_sec;
+	attrs.creationTime.tv_nsec = ft->create_time.tv_nsec;
+
+	if (!fsp->fsp_flags.is_pathref) {
+		ret = gpfswrap_set_winattrs(fsp_get_io_fd(fsp),
+					    GPFS_WINATTR_SET_CREATION_TIME,
+					    &attrs);
+		if (ret == -1 && errno != ENOSYS) {
+			DBG_WARNING("Set GPFS ntimes failed %d\n", ret);
+			return -1;
+		}
+		return ret;
+	}
+
+	if (fsp->fsp_flags.have_proc_fds) {
+		int fd = fsp_get_pathref_fd(fsp);
+		struct sys_proc_fd_path_buf buf;
+
+		ret = gpfswrap_set_winattrs_path(
+			sys_proc_fd_path(fd, &buf),
+			GPFS_WINATTR_SET_CREATION_TIME,
+			&attrs);
+		if (ret == -1 && errno != ENOSYS) {
+			DBG_WARNING("Set GPFS ntimes failed %d\n", ret);
+			return -1;
+		}
+		return ret;
+	}
+
+	/*
+	 * This is no longer a handle based call.
+	 */
+	ret = gpfswrap_set_winattrs_path(fsp->fsp_name->base_name,
+					 GPFS_WINATTR_SET_CREATION_TIME,
+					 &attrs);
+	if (ret == -1 && errno != ENOSYS) {
+		DBG_WARNING("Set GPFS ntimes failed %d\n", ret);
+		return -1;
+	}
+
+	return 0;
+}
+
+static int vfs_gpfs_fallocate(struct vfs_handle_struct *handle,
+			      struct files_struct *fsp, uint32_t mode,
+			      off_t offset, off_t len)
+{
+	if (mode == (VFS_FALLOCATE_FL_PUNCH_HOLE|VFS_FALLOCATE_FL_KEEP_SIZE) &&
+	    !fsp->fsp_flags.is_sparse &&
+	    lp_strict_allocate(SNUM(fsp->conn))) {
+		/*
+		 * This is from a ZERO_DATA request on a non-sparse
+		 * file. GPFS does not support FL_KEEP_SIZE and thus
+		 * cannot fill the whole again in the subsequent
+		 * fallocate(FL_KEEP_SIZE). Deny this FL_PUNCH_HOLE
+		 * call to not end up with a hole in a non-sparse
+		 * file.
+		 */
+		errno = ENOTSUP;
+		return -1;
+	}
+
+	return SMB_VFS_NEXT_FALLOCATE(handle, fsp, mode, offset, len);
+}
+
+static int vfs_gpfs_ftruncate(vfs_handle_struct *handle, files_struct *fsp,
+				off_t len)
+{
+	int result;
+	struct gpfs_config_data *config;
+
+	SMB_VFS_HANDLE_GET_DATA(handle, config,
+				struct gpfs_config_data,
+				return -1);
+
+	if (!config->ftruncate) {
+		return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, len);
+	}
+
+	result = gpfswrap_ftruncate(fsp_get_io_fd(fsp), len);
+	if ((result == -1) && (errno == ENOSYS)) {
+		return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, len);
+	}
+	return result;
+}
+
+static bool vfs_gpfs_is_offline(struct vfs_handle_struct *handle,
+				struct files_struct *fsp,
+				SMB_STRUCT_STAT *sbuf)
+{
+	struct gpfs_winattr attrs;
+	struct gpfs_config_data *config;
+	int ret;
+
+	SMB_VFS_HANDLE_GET_DATA(handle, config,
+				struct gpfs_config_data,
+				return false);
+
+	if (!config->winattr) {
+		return false;
+	}
+
+	ret = gpfswrap_get_winattrs(fsp_get_pathref_fd(fsp), &attrs);
+	if (ret == -1) {
+		return false;
+	}
+
+	if ((attrs.winAttrs & GPFS_WINATTR_OFFLINE) != 0) {
+		DBG_DEBUG("%s is offline\n", fsp_str_dbg(fsp));
+		return true;
+	}
+
+	DBG_DEBUG("%s is online\n", fsp_str_dbg(fsp));
+	return false;
+}
+
+static bool vfs_gpfs_fsp_is_offline(struct vfs_handle_struct *handle,
+				    struct files_struct *fsp)
+{
+	struct gpfs_fsp_extension *ext;
+
+	ext = VFS_FETCH_FSP_EXTENSION(handle, fsp);
+	if (ext == NULL) {
+		/*
+		 * Something bad happened, always ask.
+		 */
+		return vfs_gpfs_is_offline(handle, fsp,
+					   &fsp->fsp_name->st);
+	}
+
+	if (ext->offline) {
+		/*
+		 * As long as it's offline, ask.
+		 */
+		ext->offline = vfs_gpfs_is_offline(handle, fsp,
+						   &fsp->fsp_name->st);
+	}
+
+	return ext->offline;
+}
+
+static bool vfs_gpfs_aio_force(struct vfs_handle_struct *handle,
+			       struct files_struct *fsp)
+{
+	return vfs_gpfs_fsp_is_offline(handle, fsp);
+}
+
+static ssize_t vfs_gpfs_sendfile(vfs_handle_struct *handle, int tofd,
+				 files_struct *fsp, const DATA_BLOB *hdr,
+				 off_t offset, size_t n)
+{
+	if (vfs_gpfs_fsp_is_offline(handle, fsp)) {
+		errno = ENOSYS;
+		return -1;
+	}
+	return SMB_VFS_NEXT_SENDFILE(handle, tofd, fsp, hdr, offset, n);
+}
+
+#ifdef O_PATH
+static int vfs_gpfs_check_pathref_fstat_x(struct gpfs_config_data *config,
+					  struct connection_struct *conn)
+{
+	struct gpfs_iattr64 iattr = {0};
+	unsigned int litemask = 0;
+	int saved_errno;
+	int fd;
+	int ret;
+
+	fd = open(conn->connectpath, O_PATH);
+	if (fd == -1) {
+		DBG_ERR("openat() of share with O_PATH failed: %s\n",
+			strerror(errno));
+		return -1;
+	}
+
+	ret = gpfswrap_fstat_x(fd, &litemask, &iattr, sizeof(iattr));
+	if (ret == 0) {
+		close(fd);
+		config->pathref_ok.gpfs_fstat_x = true;
+		return 0;
+	}
+
+	saved_errno = errno;
+	ret = close(fd);
+	if (ret != 0) {
+		DBG_ERR("close failed: %s\n", strerror(errno));
+		return -1;
+	}
+
+	if (saved_errno != EBADF) {
+		DBG_ERR("gpfswrap_fstat_x() of O_PATH handle failed: %s\n",
+			strerror(saved_errno));
+		return -1;
+	}
+
+	return 0;
+}
+#endif
+
+static int vfs_gpfs_check_pathref(struct gpfs_config_data *config,
+				  struct connection_struct *conn)
+{
+#ifndef O_PATH
+	/*
+	 * This code path leaves all struct gpfs_config_data.pathref_ok members
+	 * initialized to false.
+	 */
+	return 0;
+#else
+	int ret;
+
+	ret = vfs_gpfs_check_pathref_fstat_x(config, conn);
+	if (ret != 0) {
+		return -1;
+	}
+
+	return 0;
+#endif
+}
+
+static int vfs_gpfs_connect(struct vfs_handle_struct *handle,
+			    const char *service, const char *user)
+{
+	struct gpfs_config_data *config;
+	int ret;
+	bool check_fstype;
+
+	ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
+	if (ret < 0) {
+		return ret;
+	}
+
+	if (IS_IPC(handle->conn)) {
+		return 0;
+	}
+
+	ret = gpfswrap_init();
+	if (ret < 0) {
+		DBG_ERR("Could not load GPFS library.\n");
+		return ret;
+	}
+
+	ret = gpfswrap_lib_init(0);
+	if (ret < 0) {
+		DBG_ERR("Could not open GPFS device file: %s\n",
+			strerror(errno));
+		return ret;
+	}
+
+	ret = gpfswrap_register_cifs_export();
+	if (ret < 0) {
+		DBG_ERR("Failed to register with GPFS: %s\n", strerror(errno));
+		return ret;
+	}
+
+	config = talloc_zero(handle->conn, struct gpfs_config_data);
+	if (!config) {
+		DEBUG(0, ("talloc_zero() failed\n"));
+		errno = ENOMEM;
+		return -1;
+	}
+
+	check_fstype = lp_parm_bool(SNUM(handle->conn), "gpfs",
+				    "check_fstype", true);
+
+	if (check_fstype) {
+		const char *connectpath = handle->conn->connectpath;
+		struct statfs buf = { 0 };
+
+		ret = statfs(connectpath, &buf);
+		if (ret != 0) {
+			DBG_ERR("statfs failed for share %s at path %s: %s\n",
+				service, connectpath, strerror(errno));
+			TALLOC_FREE(config);
+			return ret;
+		}
+
+		if (buf.f_type != GPFS_SUPER_MAGIC) {
+			DBG_ERR("SMB share %s, path %s not in GPFS file system."
+				" statfs magic: 0x%jx\n",
+				service,
+				connectpath,
+				(uintmax_t)buf.f_type);
+			errno = EINVAL;
+			TALLOC_FREE(config);
+			return -1;
+		}
+	}
+
+	ret = smbacl4_get_vfs_params(handle->conn, &config->nfs4_params);
+	if (ret < 0) {
+		TALLOC_FREE(config);
+		return ret;
+	}
+
+	config->sharemodes = lp_parm_bool(SNUM(handle->conn), "gpfs",
+					"sharemodes", true);
+
+	config->leases = lp_parm_bool(SNUM(handle->conn), "gpfs",
+					"leases", true);
+
+	config->hsm = lp_parm_bool(SNUM(handle->conn), "gpfs",
+				   "hsm", false);
+
+	config->syncio = lp_parm_bool(SNUM(handle->conn), "gpfs",
+				      "syncio", false);
+
+	config->winattr = lp_parm_bool(SNUM(handle->conn), "gpfs",
+				       "winattr", false);
+
+	config->ftruncate = lp_parm_bool(SNUM(handle->conn), "gpfs",
+					 "ftruncate", true);
+
+	config->getrealfilename = lp_parm_bool(SNUM(handle->conn), "gpfs",
+					       "getrealfilename", true);
+
+	config->dfreequota = lp_parm_bool(SNUM(handle->conn), "gpfs",
+					  "dfreequota", false);
+
+	config->acl = lp_parm_bool(SNUM(handle->conn), "gpfs", "acl", true);
+
+	config->settimes = lp_parm_bool(SNUM(handle->conn), "gpfs",
+					"settimes", true);
+	config->recalls = lp_parm_bool(SNUM(handle->conn), "gpfs",
+				       "recalls", true);
+
+	ret = vfs_gpfs_check_pathref(config, handle->conn);
+	if (ret != 0) {
+		DBG_ERR("vfs_gpfs_check_pathref() on [%s] failed\n",
+			handle->conn->connectpath);
+		TALLOC_FREE(config);
+		return -1;
+	}
+
+	SMB_VFS_HANDLE_SET_DATA(handle, config,
+				NULL, struct gpfs_config_data,
+				return -1);
+
+	if (config->leases) {
+		/*
+		 * GPFS lease code is based on kernel oplock code
+		 * so make sure it is turned on
+		 */
+		if (!lp_kernel_oplocks(SNUM(handle->conn))) {
+			DEBUG(5, ("Enabling kernel oplocks for "
+				  "gpfs:leases to work\n"));
+			lp_do_parameter(SNUM(handle->conn), "kernel oplocks",
+					"true");
+		}
+
+		/*
+		 * as the kernel does not properly support Level II oplocks
+		 * and GPFS leases code is based on kernel infrastructure, we
+		 * need to turn off Level II oplocks if gpfs:leases is enabled
+		 */
+		if (lp_level2_oplocks(SNUM(handle->conn))) {
+			DEBUG(5, ("gpfs:leases are enabled, disabling "
+				  "Level II oplocks\n"));
+			lp_do_parameter(SNUM(handle->conn), "level2 oplocks",
+					"false");
+		}
+	}
+
+	/*
+	 * Unless we have an async implementation of get_dos_attributes turn
+	 * this off.
+	 */
+	lp_do_parameter(SNUM(handle->conn), "smbd async dosmode", "false");
+
+	return 0;
+}
+
+static int get_gpfs_quota(const char *pathname, int type, int id,
+			  struct gpfs_quotaInfo *qi)
+{
+	int ret;
+
+	ret = gpfswrap_quotactl(pathname, GPFS_QCMD(Q_GETQUOTA, type), id, qi);
+
+	if (ret) {
+		if (errno == GPFS_E_NO_QUOTA_INST) {
+			DEBUG(10, ("Quotas disabled on GPFS filesystem.\n"));
+		} else if (errno != ENOSYS) {
+			DEBUG(0, ("Get quota failed, type %d, id, %d, "
+				  "errno %d.\n", type, id, errno));
+		}
+
+		return ret;
+	}
+
+	DEBUG(10, ("quota type %d, id %d, blk u:%lld h:%lld s:%lld gt:%u\n",
+		   type, id, qi->blockUsage, qi->blockHardLimit,
+		   qi->blockSoftLimit, qi->blockGraceTime));
+
+	return ret;
+}
+
+static void vfs_gpfs_disk_free_quota(struct gpfs_quotaInfo qi, time_t cur_time,
+				     uint64_t *dfree, uint64_t *dsize)
+{
+	uint64_t usage, limit;
+
+	/*
+	 * The quota reporting is done in units of 1024 byte blocks, but
+	 * sys_fsusage uses units of 512 byte blocks, adjust the block number
+	 * accordingly. Also filter possibly negative usage counts from gpfs.
+	 */
+	usage = qi.blockUsage < 0 ? 0 : (uint64_t)qi.blockUsage * 2;
+	limit = (uint64_t)qi.blockHardLimit * 2;
+
+	/*
+	 * When the grace time for the exceeded soft block quota has been
+	 * exceeded, the soft block quota becomes an additional hard limit.
+	 */
+	if (qi.blockSoftLimit &&
+	    qi.blockGraceTime && cur_time > qi.blockGraceTime) {
+		/* report disk as full */
+		*dfree = 0;
+		*dsize = MIN(*dsize, usage);
+	}
+
+	if (!qi.blockHardLimit)
+		return;
+
+	if (usage >= limit) {
+		/* report disk as full */
+		*dfree = 0;
+		*dsize = MIN(*dsize, usage);
+
+	} else {
+		/* limit has not been reached, determine "free space" */
+		*dfree = MIN(*dfree, limit - usage);
+		*dsize = MIN(*dsize, limit);
+	}
+}
+
+static uint64_t vfs_gpfs_disk_free(vfs_handle_struct *handle,
+				const struct smb_filename *smb_fname,
+				uint64_t *bsize,
+				uint64_t *dfree,
+				uint64_t *dsize)
+{
+	struct security_unix_token *utok;
+	struct gpfs_quotaInfo qi_user = { 0 }, qi_group = { 0 };
+	struct gpfs_config_data *config;
+	int err;
+	time_t cur_time;
+
+	SMB_VFS_HANDLE_GET_DATA(handle, config, struct gpfs_config_data,
+				return (uint64_t)-1);
+	if (!config->dfreequota) {
+		return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname,
+					      bsize, dfree, dsize);
+	}
+
+	err = sys_fsusage(smb_fname->base_name, dfree, dsize);
+	if (err) {
+		DEBUG (0, ("Could not get fs usage, errno %d\n", errno));
+		return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname,
+					      bsize, dfree, dsize);
+	}
+
+	/* sys_fsusage returns units of 512 bytes */
+	*bsize = 512;
+
+	DEBUG(10, ("fs dfree %llu, dsize %llu\n",
+		   (unsigned long long)*dfree, (unsigned long long)*dsize));
+
+	utok = handle->conn->session_info->unix_token;
+
+	err = get_gpfs_quota(smb_fname->base_name,
+			GPFS_USRQUOTA, utok->uid, &qi_user);
+	if (err) {
+		return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname,
+					      bsize, dfree, dsize);
+	}
+
+	/*
+	 * If new files created under this folder get this folder's
+	 * GID, then available space is governed by the quota of the
+	 * folder's GID, not the primary group of the creating user.
+	 */
+	if (VALID_STAT(smb_fname->st) &&
+	    S_ISDIR(smb_fname->st.st_ex_mode) &&
+	    smb_fname->st.st_ex_mode & S_ISGID) {
+		become_root();
+		err = get_gpfs_quota(smb_fname->base_name, GPFS_GRPQUOTA,
+				     smb_fname->st.st_ex_gid, &qi_group);
+		unbecome_root();
+
+	} else {
+		err = get_gpfs_quota(smb_fname->base_name, GPFS_GRPQUOTA,
+				     utok->gid, &qi_group);
+	}
+
+	if (err) {
+		return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname,
+					      bsize, dfree, dsize);
+	}
+
+	cur_time = time(NULL);
+
+	/* Adjust free space and size according to quota limits. */
+	vfs_gpfs_disk_free_quota(qi_user, cur_time, dfree, dsize);
+	vfs_gpfs_disk_free_quota(qi_group, cur_time, dfree, dsize);
+
+	return *dfree / 2;
+}
+
+static int vfs_gpfs_get_quota(vfs_handle_struct *handle,
+				const struct smb_filename *smb_fname,
+				enum SMB_QUOTA_TYPE qtype,
+				unid_t id,
+				SMB_DISK_QUOTA *dq)
+{
+	switch(qtype) {
+		/*
+		 * User/group quota are being used for disk-free
+		 * determination, which in this module is done directly
+		 * by the disk-free function. It's important that this
+		 * module does not return wrong quota values by mistake,
+		 * which would modify the correct values set by disk-free.
+		 * User/group quota are also being used for processing
+		 * NT_TRANSACT_GET_USER_QUOTA in smb1 protocol, which is
+		 * currently not supported by this module.
+		 */
+		case SMB_USER_QUOTA_TYPE:
+		case SMB_GROUP_QUOTA_TYPE:
+			errno = ENOSYS;
+			return -1;
+		default:
+			return SMB_VFS_NEXT_GET_QUOTA(handle, smb_fname,
+					qtype, id, dq);
+	}
+}
+
+static uint32_t vfs_gpfs_capabilities(struct vfs_handle_struct *handle,
+				      enum timestamp_set_resolution *p_ts_res)
+{
+	struct gpfs_config_data *config;
+	uint32_t next;
+
+	next = SMB_VFS_NEXT_FS_CAPABILITIES(handle, p_ts_res);
+
+	SMB_VFS_HANDLE_GET_DATA(handle, config,
+				struct gpfs_config_data,
+				return next);
+
+	if (config->hsm) {
+		next |= FILE_SUPPORTS_REMOTE_STORAGE;
+	}
+	return next;
+}
+
+static int vfs_gpfs_openat(struct vfs_handle_struct *handle,
+			   const struct files_struct *dirfsp,
+			   const struct smb_filename *smb_fname,
+			   files_struct *fsp,
+			   const struct vfs_open_how *_how)
+{
+	struct vfs_open_how how = *_how;
+	struct gpfs_config_data *config = NULL;
+	struct gpfs_fsp_extension *ext = NULL;
+	int ret;
+
+	SMB_VFS_HANDLE_GET_DATA(handle, config,
+				struct gpfs_config_data,
+				return -1);
+
+	if (config->hsm && !config->recalls &&
+	    !fsp->fsp_flags.is_pathref &&
+	    vfs_gpfs_fsp_is_offline(handle, fsp))
+	{
+		DBG_DEBUG("Refusing access to offline file %s\n",
+			  fsp_str_dbg(fsp));
+		errno = EACCES;
+		return -1;
+	}
+
+	if (config->syncio) {
+		how.flags |= O_SYNC;
+	}
+
+	ext = VFS_ADD_FSP_EXTENSION(handle, fsp, struct gpfs_fsp_extension,
+				    NULL);
+	if (ext == NULL) {
+		errno = ENOMEM;
+		return -1;
+	}
+
+	/*
+	 * Assume the file is offline until gpfs tells us it's online.
+	 */
+	*ext = (struct gpfs_fsp_extension) { .offline = true };
+
+	ret = SMB_VFS_NEXT_OPENAT(handle, dirfsp, smb_fname, fsp, &how);
+	if (ret == -1) {
+		VFS_REMOVE_FSP_EXTENSION(handle, fsp);
+	}
+	return ret;
+}
+
+static ssize_t vfs_gpfs_pread(vfs_handle_struct *handle, files_struct *fsp,
+			      void *data, size_t n, off_t offset)
+{
+	ssize_t ret;
+	bool was_offline;
+
+	was_offline = vfs_gpfs_fsp_is_offline(handle, fsp);
+
+	ret = SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
+
+	if ((ret != -1) && was_offline) {
+		notify_fname(handle->conn, NOTIFY_ACTION_MODIFIED,
+			     FILE_NOTIFY_CHANGE_ATTRIBUTES,
+			     fsp->fsp_name->base_name);
+	}
+
+	return ret;
+}
+
+struct vfs_gpfs_pread_state {
+	struct files_struct *fsp;
+	ssize_t ret;
+	bool was_offline;
+	struct vfs_aio_state vfs_aio_state;
+};
+
+static void vfs_gpfs_pread_done(struct tevent_req *subreq);
+
+static struct tevent_req *vfs_gpfs_pread_send(struct vfs_handle_struct *handle,
+					      TALLOC_CTX *mem_ctx,
+					      struct tevent_context *ev,
+					      struct files_struct *fsp,
+					      void *data, size_t n,
+					      off_t offset)
+{
+	struct tevent_req *req, *subreq;
+	struct vfs_gpfs_pread_state *state;
+
+	req = tevent_req_create(mem_ctx, &state, struct vfs_gpfs_pread_state);
+	if (req == NULL) {
+		return NULL;
+	}
+	state->was_offline = vfs_gpfs_fsp_is_offline(handle, fsp);
+	state->fsp = fsp;
+	subreq = SMB_VFS_NEXT_PREAD_SEND(state, ev, handle, fsp, data,
+					 n, offset);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq, vfs_gpfs_pread_done, req);
+	return req;
+}
+
+static void vfs_gpfs_pread_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct vfs_gpfs_pread_state *state = tevent_req_data(
+		req, struct vfs_gpfs_pread_state);
+
+	state->ret = SMB_VFS_PREAD_RECV(subreq, &state->vfs_aio_state);
+	TALLOC_FREE(subreq);
+	tevent_req_done(req);
+}
+
+static ssize_t vfs_gpfs_pread_recv(struct tevent_req *req,
+				   struct vfs_aio_state *vfs_aio_state)
+{
+	struct vfs_gpfs_pread_state *state = tevent_req_data(
+		req, struct vfs_gpfs_pread_state);
+	struct files_struct *fsp = state->fsp;
+
+	if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
+		return -1;
+	}
+	*vfs_aio_state = state->vfs_aio_state;
+
+	if ((state->ret != -1) && state->was_offline) {
+		DEBUG(10, ("sending notify\n"));
+		notify_fname(fsp->conn, NOTIFY_ACTION_MODIFIED,
+			     FILE_NOTIFY_CHANGE_ATTRIBUTES,
+			     fsp->fsp_name->base_name);
+	}
+
+	return state->ret;
+}
+
+static ssize_t vfs_gpfs_pwrite(vfs_handle_struct *handle, files_struct *fsp,
+			       const void *data, size_t n, off_t offset)
+{
+	ssize_t ret;
+	bool was_offline;
+
+	was_offline = vfs_gpfs_fsp_is_offline(handle, fsp);
+
+	ret = SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
+
+	if ((ret != -1) && was_offline) {
+		notify_fname(handle->conn, NOTIFY_ACTION_MODIFIED,
+			     FILE_NOTIFY_CHANGE_ATTRIBUTES,
+			     fsp->fsp_name->base_name);
+	}
+
+	return ret;
+}
+
+struct vfs_gpfs_pwrite_state {
+	struct files_struct *fsp;
+	ssize_t ret;
+	bool was_offline;
+	struct vfs_aio_state vfs_aio_state;
+};
+
+static void vfs_gpfs_pwrite_done(struct tevent_req *subreq);
+
+static struct tevent_req *vfs_gpfs_pwrite_send(
+	struct vfs_handle_struct *handle,
+	TALLOC_CTX *mem_ctx,
+	struct tevent_context *ev,
+	struct files_struct *fsp,
+	const void *data, size_t n,
+	off_t offset)
+{
+	struct tevent_req *req, *subreq;
+	struct vfs_gpfs_pwrite_state *state;
+
+	req = tevent_req_create(mem_ctx, &state, struct vfs_gpfs_pwrite_state);
+	if (req == NULL) {
+		return NULL;
+	}
+	state->was_offline = vfs_gpfs_fsp_is_offline(handle, fsp);
+	state->fsp = fsp;
+	subreq = SMB_VFS_NEXT_PWRITE_SEND(state, ev, handle, fsp, data,
+					 n, offset);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq, vfs_gpfs_pwrite_done, req);
+	return req;
+}
+
+static void vfs_gpfs_pwrite_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct vfs_gpfs_pwrite_state *state = tevent_req_data(
+		req, struct vfs_gpfs_pwrite_state);
+
+	state->ret = SMB_VFS_PWRITE_RECV(subreq, &state->vfs_aio_state);
+	TALLOC_FREE(subreq);
+	tevent_req_done(req);
+}
+
+static ssize_t vfs_gpfs_pwrite_recv(struct tevent_req *req,
+				    struct vfs_aio_state *vfs_aio_state)
+{
+	struct vfs_gpfs_pwrite_state *state = tevent_req_data(
+		req, struct vfs_gpfs_pwrite_state);
+	struct files_struct *fsp = state->fsp;
+
+	if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
+		return -1;
+	}
+	*vfs_aio_state = state->vfs_aio_state;
+
+	if ((state->ret != -1) && state->was_offline) {
+		DEBUG(10, ("sending notify\n"));
+		notify_fname(fsp->conn, NOTIFY_ACTION_MODIFIED,
+			     FILE_NOTIFY_CHANGE_ATTRIBUTES,
+			     fsp->fsp_name->base_name);
+	}
+
+	return state->ret;
+}
+
+
+static struct vfs_fn_pointers vfs_gpfs_fns = {
+	.connect_fn = vfs_gpfs_connect,
+	.disk_free_fn = vfs_gpfs_disk_free,
+	.get_quota_fn = vfs_gpfs_get_quota,
+	.fs_capabilities_fn = vfs_gpfs_capabilities,
+	.filesystem_sharemode_fn = vfs_gpfs_filesystem_sharemode,
+	.linux_setlease_fn = vfs_gpfs_setlease,
+	.get_real_filename_at_fn = vfs_gpfs_get_real_filename_at,
+	.get_dos_attributes_send_fn = vfs_not_implemented_get_dos_attributes_send,
+	.get_dos_attributes_recv_fn = vfs_not_implemented_get_dos_attributes_recv,
+	.fget_dos_attributes_fn = vfs_gpfs_fget_dos_attributes,
+	.fset_dos_attributes_fn = vfs_gpfs_fset_dos_attributes,
+	.fget_nt_acl_fn = gpfsacl_fget_nt_acl,
+	.fset_nt_acl_fn = gpfsacl_fset_nt_acl,
+	.sys_acl_get_fd_fn = gpfsacl_sys_acl_get_fd,
+	.sys_acl_blob_get_fd_fn = gpfsacl_sys_acl_blob_get_fd,
+	.sys_acl_set_fd_fn = gpfsacl_sys_acl_set_fd,
+	.sys_acl_delete_def_fd_fn = gpfsacl_sys_acl_delete_def_fd,
+	.fchmod_fn = vfs_gpfs_fchmod,
+	.close_fn = vfs_gpfs_close,
+	.stat_fn = nfs4_acl_stat,
+	.fstat_fn = nfs4_acl_fstat,
+	.lstat_fn = nfs4_acl_lstat,
+	.fstatat_fn = nfs4_acl_fstatat,
+	.fntimes_fn = vfs_gpfs_fntimes,
+	.aio_force_fn = vfs_gpfs_aio_force,
+	.sendfile_fn = vfs_gpfs_sendfile,
+	.fallocate_fn = vfs_gpfs_fallocate,
+	.openat_fn = vfs_gpfs_openat,
+	.pread_fn = vfs_gpfs_pread,
+	.pread_send_fn = vfs_gpfs_pread_send,
+	.pread_recv_fn = vfs_gpfs_pread_recv,
+	.pwrite_fn = vfs_gpfs_pwrite,
+	.pwrite_send_fn = vfs_gpfs_pwrite_send,
+	.pwrite_recv_fn = vfs_gpfs_pwrite_recv,
+	.ftruncate_fn = vfs_gpfs_ftruncate
+};
+
+static_decl_vfs;
+NTSTATUS vfs_gpfs_init(TALLOC_CTX *ctx)
+{
+	return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "gpfs",
+				&vfs_gpfs_fns);
+}