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, 2673 insertions, 0 deletions

diff --git a/source3/modules/vfs_glusterfs.c b/source3/modules/vfs_glusterfs.c
new file mode 100644
index 0000000..235329f
--- /dev/null
+++ b/source3/modules/vfs_glusterfs.c
@@ -0,0 +1,2673 @@
+/*
+   Unix SMB/CIFS implementation.
+
+   Wrap GlusterFS GFAPI calls in vfs functions.
+
+   Copyright (c) 2013 Anand Avati <avati@redhat.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/>.
+*/
+
+/**
+ * @file   vfs_glusterfs.c
+ * @author Anand Avati <avati@redhat.com>
+ * @date   May 2013
+ * @brief  Samba VFS module for glusterfs
+ *
+ * @todo
+ *   - sendfile/recvfile support
+ *
+ * A Samba VFS module for GlusterFS, based on Gluster's libgfapi.
+ * This is a "bottom" vfs module (not something to be stacked on top of
+ * another module), and translates (most) calls to the closest actions
+ * available in libgfapi.
+ *
+ */
+
+#include "includes.h"
+#include "smbd/smbd.h"
+#include <stdio.h>
+#include <glusterfs/api/glfs.h>
+#include "lib/util/dlinklist.h"
+#include "lib/util/tevent_unix.h"
+#include "smbd/globals.h"
+#include "lib/util/sys_rw.h"
+#include "smbprofile.h"
+#include "modules/posixacl_xattr.h"
+#include "lib/pthreadpool/pthreadpool_tevent.h"
+
+#define DEFAULT_VOLFILE_SERVER "localhost"
+#define GLUSTER_NAME_MAX 255
+
+/**
+ * Helper to convert struct stat to struct stat_ex.
+ */
+static void smb_stat_ex_from_stat(struct stat_ex *dst, const struct stat *src)
+{
+	ZERO_STRUCTP(dst);
+
+	dst->st_ex_dev = src->st_dev;
+	dst->st_ex_ino = src->st_ino;
+	dst->st_ex_mode = src->st_mode;
+	dst->st_ex_nlink = src->st_nlink;
+	dst->st_ex_uid = src->st_uid;
+	dst->st_ex_gid = src->st_gid;
+	dst->st_ex_rdev = src->st_rdev;
+	dst->st_ex_size = src->st_size;
+	dst->st_ex_atime.tv_sec = src->st_atime;
+	dst->st_ex_mtime.tv_sec = src->st_mtime;
+	dst->st_ex_ctime.tv_sec = src->st_ctime;
+	dst->st_ex_btime.tv_sec = src->st_mtime;
+	dst->st_ex_blksize = src->st_blksize;
+	dst->st_ex_blocks = src->st_blocks;
+#ifdef STAT_HAVE_NSEC
+	dst->st_ex_atime.tv_nsec = src->st_atime_nsec;
+	dst->st_ex_mtime.tv_nsec = src->st_mtime_nsec;
+	dst->st_ex_ctime.tv_nsec = src->st_ctime_nsec;
+	dst->st_ex_btime.tv_nsec = src->st_mtime_nsec;
+#endif
+}
+
+/* pre-opened glfs_t */
+
+static struct glfs_preopened {
+	char *volume;
+	char *connectpath;
+	glfs_t *fs;
+	int ref;
+	struct glfs_preopened *next, *prev;
+} *glfs_preopened;
+
+
+static int glfs_set_preopened(const char *volume, const char *connectpath, glfs_t *fs)
+{
+	struct glfs_preopened *entry = NULL;
+
+	entry = talloc_zero(NULL, struct glfs_preopened);
+	if (!entry) {
+		errno = ENOMEM;
+		return -1;
+	}
+
+	entry->volume = talloc_strdup(entry, volume);
+	if (!entry->volume) {
+		talloc_free(entry);
+		errno = ENOMEM;
+		return -1;
+	}
+
+	entry->connectpath = talloc_strdup(entry, connectpath);
+	if (entry->connectpath == NULL) {
+		talloc_free(entry);
+		errno = ENOMEM;
+		return -1;
+	}
+
+	entry->fs = fs;
+	entry->ref = 1;
+
+	DLIST_ADD(glfs_preopened, entry);
+
+	return 0;
+}
+
+static glfs_t *glfs_find_preopened(const char *volume, const char *connectpath)
+{
+	struct glfs_preopened *entry = NULL;
+
+	for (entry = glfs_preopened; entry; entry = entry->next) {
+		if (strcmp(entry->volume, volume) == 0 &&
+		    strcmp(entry->connectpath, connectpath) == 0)
+		{
+			entry->ref++;
+			return entry->fs;
+		}
+	}
+
+	return NULL;
+}
+
+static void glfs_clear_preopened(glfs_t *fs)
+{
+	struct glfs_preopened *entry = NULL;
+
+	for (entry = glfs_preopened; entry; entry = entry->next) {
+		if (entry->fs == fs) {
+			if (--entry->ref)
+				return;
+
+			DLIST_REMOVE(glfs_preopened, entry);
+
+			glfs_fini(entry->fs);
+			talloc_free(entry);
+			break;
+		}
+	}
+}
+
+static int vfs_gluster_set_volfile_servers(glfs_t *fs,
+					   const char *volfile_servers)
+{
+	char *server = NULL;
+	size_t server_count = 0;
+	size_t server_success = 0;
+	int   ret = -1;
+	TALLOC_CTX *frame = talloc_stackframe();
+
+	DBG_INFO("servers list %s\n", volfile_servers);
+
+	while (next_token_talloc(frame, &volfile_servers, &server, " \t")) {
+		char *transport = NULL;
+		char *host = NULL;
+		int   port = 0;
+
+		server_count++;
+		DBG_INFO("server %zu %s\n", server_count, server);
+
+		/* Determine the transport type */
+		if (strncmp(server, "unix+", 5) == 0) {
+			port = 0;
+			transport = talloc_strdup(frame, "unix");
+			if (!transport) {
+				errno = ENOMEM;
+				goto out;
+			}
+			host = talloc_strdup(frame, server + 5);
+			if (!host) {
+				errno = ENOMEM;
+				goto out;
+			}
+		} else {
+			char *p = NULL;
+			char *port_index = NULL;
+
+			if (strncmp(server, "tcp+", 4) == 0) {
+				server += 4;
+			}
+
+			/* IPv6 is enclosed in []
+			 * ':' before ']' is part of IPv6
+			 * ':' after  ']' indicates port
+			 */
+			p = server;
+			if (server[0] == '[') {
+				server++;
+				p = index(server, ']');
+				if (p == NULL) {
+					/* Malformed IPv6 */
+					continue;
+				}
+				p[0] = '\0';
+				p++;
+			}
+
+			port_index = index(p, ':');
+
+			if (port_index == NULL) {
+				port = 0;
+			} else {
+				port = atoi(port_index + 1);
+				port_index[0] = '\0';
+			}
+			transport = talloc_strdup(frame, "tcp");
+			if (!transport) {
+				errno = ENOMEM;
+				goto out;
+			}
+			host = talloc_strdup(frame, server);
+			if (!host) {
+				errno = ENOMEM;
+				goto out;
+			}
+		}
+
+		DBG_INFO("Calling set volfile server with params "
+			 "transport=%s, host=%s, port=%d\n", transport,
+			  host, port);
+
+		ret = glfs_set_volfile_server(fs, transport, host, port);
+		if (ret < 0) {
+			DBG_WARNING("Failed to set volfile_server "
+				    "transport=%s, host=%s, port=%d (%s)\n",
+				    transport, host, port, strerror(errno));
+		} else {
+			server_success++;
+		}
+	}
+
+out:
+	if (server_count == 0) {
+		ret = -1;
+	} else if (server_success < server_count) {
+		DBG_WARNING("Failed to set %zu out of %zu servers parsed\n",
+			    server_count - server_success, server_count);
+		ret = 0;
+	}
+
+	TALLOC_FREE(frame);
+	return ret;
+}
+
+/* Disk Operations */
+
+static int check_for_write_behind_translator(TALLOC_CTX *mem_ctx,
+					     glfs_t *fs,
+					     const char *volume)
+{
+	char *buf = NULL;
+	char **lines = NULL;
+	int numlines = 0;
+	int i;
+	char *option;
+	bool write_behind_present = false;
+	size_t newlen;
+	int ret;
+
+	ret = glfs_get_volfile(fs, NULL, 0);
+	if (ret == 0) {
+		DBG_ERR("%s: Failed to get volfile for "
+			"volume (%s): No volfile\n",
+			volume,
+			strerror(errno));
+		return -1;
+	}
+	if (ret > 0) {
+		DBG_ERR("%s: Invalid return %d for glfs_get_volfile for "
+			"volume (%s): No volfile\n",
+			volume,
+			ret,
+			strerror(errno));
+		return -1;
+	}
+
+	newlen = 0 - ret;
+
+	buf = talloc_zero_array(mem_ctx, char, newlen);
+	if (buf == NULL) {
+		return -1;
+	}
+
+	ret = glfs_get_volfile(fs, buf, newlen);
+	if (ret != newlen) {
+		TALLOC_FREE(buf);
+		DBG_ERR("%s: Failed to get volfile for volume (%s)\n",
+			volume, strerror(errno));
+		return -1;
+	}
+
+	option = talloc_asprintf(mem_ctx, "volume %s-write-behind", volume);
+	if (option == NULL) {
+		TALLOC_FREE(buf);
+		return -1;
+	}
+
+	/*
+	 * file_lines_parse() plays horrible tricks with
+	 * the passed-in talloc pointers and the hierarchy
+	 * which makes freeing hard to get right.
+	 *
+	 * As we know mem_ctx is freed by the caller, after
+	 * this point don't free on exit and let the caller
+	 * handle it. This violates good Samba coding practice
+	 * but we know we're not leaking here.
+	 */
+
+	lines = file_lines_parse(buf,
+				newlen,
+				&numlines,
+				mem_ctx);
+	if (lines == NULL || numlines <= 0) {
+		return -1;
+	}
+	/* On success, buf is now a talloc child of lines !! */
+
+	for (i=0; i < numlines; i++) {
+		if (strequal(lines[i], option)) {
+			write_behind_present = true;
+			break;
+		}
+	}
+
+	if (write_behind_present) {
+		DBG_ERR("Write behind translator is enabled for "
+			"volume (%s), refusing to connect! "
+			"Please turn off the write behind translator by calling "
+			"'gluster volume set %s performance.write-behind off' "
+			"on the commandline. "
+			"Check the vfs_glusterfs(8) manpage for "
+			"further details.\n",
+			volume, volume);
+		return -1;
+	}
+
+	return 0;
+}
+
+static int vfs_gluster_connect(struct vfs_handle_struct *handle,
+			       const char *service,
+			       const char *user)
+{
+	const struct loadparm_substitution *lp_sub =
+		loadparm_s3_global_substitution();
+	const char *volfile_servers;
+	const char *volume;
+	char *logfile;
+	int loglevel;
+	glfs_t *fs = NULL;
+	TALLOC_CTX *tmp_ctx;
+	int ret = 0;
+	bool write_behind_pass_through_set = false;
+
+	tmp_ctx = talloc_new(NULL);
+	if (tmp_ctx == NULL) {
+		ret = -1;
+		goto done;
+	}
+	logfile = lp_parm_substituted_string(tmp_ctx,
+					     lp_sub,
+					     SNUM(handle->conn),
+					     "glusterfs",
+					     "logfile",
+					     NULL);
+
+	loglevel = lp_parm_int(SNUM(handle->conn), "glusterfs", "loglevel", -1);
+
+	volfile_servers = lp_parm_substituted_string(tmp_ctx,
+						     lp_sub,
+						     SNUM(handle->conn),
+						     "glusterfs",
+						     "volfile_server",
+						     NULL);
+	if (volfile_servers == NULL) {
+		volfile_servers = DEFAULT_VOLFILE_SERVER;
+	}
+
+	volume = lp_parm_const_string(SNUM(handle->conn), "glusterfs", "volume",
+				      NULL);
+	if (volume == NULL) {
+		volume = service;
+	}
+
+	fs = glfs_find_preopened(volume, handle->conn->connectpath);
+	if (fs) {
+		goto done;
+	}
+
+	fs = glfs_new(volume);
+	if (fs == NULL) {
+		ret = -1;
+		goto done;
+	}
+
+	ret = vfs_gluster_set_volfile_servers(fs, volfile_servers);
+	if (ret < 0) {
+		DBG_ERR("Failed to set volfile_servers from list %s\n",
+			volfile_servers);
+		goto done;
+	}
+
+	ret = glfs_set_xlator_option(fs, "*-md-cache", "cache-posix-acl",
+				     "true");
+	if (ret < 0) {
+		DEBUG(0, ("%s: Failed to set xlator options\n", volume));
+		goto done;
+	}
+
+	ret = glfs_set_xlator_option(fs, "*-md-cache", "cache-selinux",
+				     "true");
+	if (ret < 0) {
+		DEBUG(0, ("%s: Failed to set xlator options\n", volume));
+		goto done;
+	}
+
+	ret = glfs_set_xlator_option(fs, "*-snapview-client",
+				     "snapdir-entry-path",
+				     handle->conn->connectpath);
+	if (ret < 0) {
+		DEBUG(0, ("%s: Failed to set xlator option:"
+			  " snapdir-entry-path\n", volume));
+		goto done;
+	}
+
+#ifdef HAVE_GFAPI_VER_7_9
+	ret = glfs_set_xlator_option(fs, "*-write-behind", "pass-through",
+				     "true");
+	if (ret < 0) {
+		DBG_ERR("%s: Failed to set xlator option: pass-through\n",
+			volume);
+		goto done;
+	}
+	write_behind_pass_through_set = true;
+#endif
+
+	ret = glfs_set_logging(fs, logfile, loglevel);
+	if (ret < 0) {
+		DEBUG(0, ("%s: Failed to set logfile %s loglevel %d\n",
+			  volume, logfile, loglevel));
+		goto done;
+	}
+
+	ret = glfs_init(fs);
+	if (ret < 0) {
+		DEBUG(0, ("%s: Failed to initialize volume (%s)\n",
+			  volume, strerror(errno)));
+		goto done;
+	}
+
+	if (!write_behind_pass_through_set) {
+		ret = check_for_write_behind_translator(tmp_ctx, fs, volume);
+		if (ret < 0) {
+			goto done;
+		}
+	}
+
+	ret = glfs_set_preopened(volume, handle->conn->connectpath, fs);
+	if (ret < 0) {
+		DEBUG(0, ("%s: Failed to register volume (%s)\n",
+			  volume, strerror(errno)));
+		goto done;
+	}
+
+	/*
+	 * The shadow_copy2 module will fail to export subdirectories
+	 * of a gluster volume unless we specify the mount point,
+	 * because the detection fails if the file system is not
+	 * locally mounted:
+	 * https://bugzilla.samba.org/show_bug.cgi?id=13091
+	 */
+	lp_do_parameter(SNUM(handle->conn), "shadow:mountpoint", "/");
+
+	/*
+	 * Unless we have an async implementation of getxattrat turn this off.
+	 */
+	lp_do_parameter(SNUM(handle->conn), "smbd async dosmode", "false");
+
+done:
+	if (ret < 0) {
+		if (fs)
+			glfs_fini(fs);
+	} else {
+		DBG_ERR("%s: Initialized volume from servers %s\n",
+			volume, volfile_servers);
+		handle->data = fs;
+	}
+	talloc_free(tmp_ctx);
+	return ret;
+}
+
+static void vfs_gluster_disconnect(struct vfs_handle_struct *handle)
+{
+	glfs_t *fs = NULL;
+
+	fs = handle->data;
+
+	glfs_clear_preopened(fs);
+}
+
+static uint64_t vfs_gluster_disk_free(struct vfs_handle_struct *handle,
+				const struct smb_filename *smb_fname,
+				uint64_t *bsize_p,
+				uint64_t *dfree_p,
+				uint64_t *dsize_p)
+{
+	struct statvfs statvfs = { 0, };
+	int ret;
+
+	ret = glfs_statvfs(handle->data, smb_fname->base_name, &statvfs);
+	if (ret < 0) {
+		return -1;
+	}
+
+	if (bsize_p != NULL) {
+		*bsize_p = (uint64_t)statvfs.f_bsize; /* Block size */
+	}
+	if (dfree_p != NULL) {
+		*dfree_p = (uint64_t)statvfs.f_bavail; /* Available Block units */
+	}
+	if (dsize_p != NULL) {
+		*dsize_p = (uint64_t)statvfs.f_blocks; /* Total Block units */
+	}
+
+	return (uint64_t)statvfs.f_bavail;
+}
+
+static int vfs_gluster_get_quota(struct vfs_handle_struct *handle,
+				const struct smb_filename *smb_fname,
+				enum SMB_QUOTA_TYPE qtype,
+				unid_t id,
+				SMB_DISK_QUOTA *qt)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int
+vfs_gluster_set_quota(struct vfs_handle_struct *handle,
+		      enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int vfs_gluster_statvfs(struct vfs_handle_struct *handle,
+				const struct smb_filename *smb_fname,
+				struct vfs_statvfs_struct *vfs_statvfs)
+{
+	struct statvfs statvfs = { 0, };
+	int ret;
+
+	ret = glfs_statvfs(handle->data, smb_fname->base_name, &statvfs);
+	if (ret < 0) {
+		DEBUG(0, ("glfs_statvfs(%s) failed: %s\n",
+			  smb_fname->base_name, strerror(errno)));
+		return -1;
+	}
+
+	ZERO_STRUCTP(vfs_statvfs);
+
+	vfs_statvfs->OptimalTransferSize = statvfs.f_frsize;
+	vfs_statvfs->BlockSize = statvfs.f_bsize;
+	vfs_statvfs->TotalBlocks = statvfs.f_blocks;
+	vfs_statvfs->BlocksAvail = statvfs.f_bfree;
+	vfs_statvfs->UserBlocksAvail = statvfs.f_bavail;
+	vfs_statvfs->TotalFileNodes = statvfs.f_files;
+	vfs_statvfs->FreeFileNodes = statvfs.f_ffree;
+	vfs_statvfs->FsIdentifier = statvfs.f_fsid;
+	vfs_statvfs->FsCapabilities =
+	    FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
+
+	return ret;
+}
+
+static uint32_t vfs_gluster_fs_capabilities(struct vfs_handle_struct *handle,
+					    enum timestamp_set_resolution *p_ts_res)
+{
+	uint32_t caps = FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
+
+#ifdef HAVE_GFAPI_VER_6
+	caps |= FILE_SUPPORTS_SPARSE_FILES;
+#endif
+
+#ifdef STAT_HAVE_NSEC
+	*p_ts_res = TIMESTAMP_SET_NT_OR_BETTER;
+#endif
+
+	return caps;
+}
+
+static glfs_fd_t *vfs_gluster_fetch_glfd(struct vfs_handle_struct *handle,
+					 const files_struct *fsp)
+{
+	glfs_fd_t **glfd = (glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp);
+	if (glfd == NULL) {
+		DBG_INFO("Failed to fetch fsp extension\n");
+		return NULL;
+	}
+	if (*glfd == NULL) {
+		DBG_INFO("Empty glfs_fd_t pointer\n");
+		return NULL;
+	}
+
+	return *glfd;
+}
+
+static DIR *vfs_gluster_fdopendir(struct vfs_handle_struct *handle,
+				  files_struct *fsp, const char *mask,
+				  uint32_t attributes)
+{
+	glfs_fd_t *glfd = NULL;
+
+	glfd = glfs_opendir(handle->data, fsp->fsp_name->base_name);
+	if (glfd == NULL) {
+		return NULL;
+	}
+
+	return (DIR *)glfd;
+}
+
+static int vfs_gluster_closedir(struct vfs_handle_struct *handle, DIR *dirp)
+{
+	int ret;
+
+	START_PROFILE(syscall_closedir);
+	ret = glfs_closedir((void *)dirp);
+	END_PROFILE(syscall_closedir);
+
+	return ret;
+}
+
+static struct dirent *vfs_gluster_readdir(struct vfs_handle_struct *handle,
+					  struct files_struct *dirfsp,
+					  DIR *dirp)
+{
+	static char direntbuf[512];
+	int ret;
+	struct dirent *dirent = 0;
+
+	START_PROFILE(syscall_readdir);
+
+	ret = glfs_readdir_r((void *)dirp, (void *)direntbuf, &dirent);
+
+	if ((ret < 0) || (dirent == NULL)) {
+		END_PROFILE(syscall_readdir);
+		return NULL;
+	}
+
+	END_PROFILE(syscall_readdir);
+	return dirent;
+}
+
+static void vfs_gluster_rewinddir(struct vfs_handle_struct *handle, DIR *dirp)
+{
+	START_PROFILE(syscall_rewinddir);
+	glfs_seekdir((void *)dirp, 0);
+	END_PROFILE(syscall_rewinddir);
+}
+
+static int vfs_gluster_mkdirat(struct vfs_handle_struct *handle,
+			struct files_struct *dirfsp,
+			const struct smb_filename *smb_fname,
+			mode_t mode)
+{
+	int ret;
+
+#ifdef HAVE_GFAPI_VER_7_11
+	glfs_fd_t *pglfd = NULL;
+
+	START_PROFILE(syscall_mkdirat);
+
+	pglfd = vfs_gluster_fetch_glfd(handle, dirfsp);
+	if (pglfd == NULL) {
+		END_PROFILE(syscall_mkdirat);
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+
+	ret = glfs_mkdirat(pglfd, smb_fname->base_name, mode);
+#else
+	struct smb_filename *full_fname = NULL;
+
+	START_PROFILE(syscall_mkdirat);
+
+	full_fname = full_path_from_dirfsp_atname(talloc_tos(),
+						  dirfsp,
+						  smb_fname);
+	if (full_fname == NULL) {
+		END_PROFILE(syscall_mkdirat);
+		return -1;
+	}
+
+	ret = glfs_mkdir(handle->data, full_fname->base_name, mode);
+
+	TALLOC_FREE(full_fname);
+#endif
+
+	END_PROFILE(syscall_mkdirat);
+
+	return ret;
+}
+
+static int vfs_gluster_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)
+{
+	int flags = how->flags;
+	struct smb_filename *full_fname = NULL;
+	bool have_opath = false;
+	bool became_root = false;
+	glfs_fd_t *glfd = NULL;
+	glfs_fd_t *pglfd = NULL;
+	glfs_fd_t **p_tmp;
+
+	START_PROFILE(syscall_openat);
+
+	if (how->resolve != 0) {
+		END_PROFILE(syscall_openat);
+		errno = ENOSYS;
+		return -1;
+	}
+
+	p_tmp = VFS_ADD_FSP_EXTENSION(handle, fsp, glfs_fd_t *, NULL);
+	if (p_tmp == NULL) {
+		END_PROFILE(syscall_openat);
+		errno = ENOMEM;
+		return -1;
+	}
+
+#ifdef O_PATH
+	have_opath = true;
+	if (fsp->fsp_flags.is_pathref) {
+		flags |= O_PATH;
+	}
+#endif
+
+	full_fname = full_path_from_dirfsp_atname(talloc_tos(),
+						  dirfsp,
+						  smb_fname);
+	if (full_fname == NULL) {
+		END_PROFILE(syscall_openat);
+		return -1;
+	}
+
+	if (fsp->fsp_flags.is_pathref && !have_opath) {
+		become_root();
+		became_root = true;
+	}
+
+	if (fsp_get_pathref_fd(dirfsp) != AT_FDCWD) {
+#ifdef HAVE_GFAPI_VER_7_11
+		/*
+		 * Fetch Gluster fd for parent directory using dirfsp
+		 * before calling glfs_openat();
+		 */
+		pglfd = vfs_gluster_fetch_glfd(handle, dirfsp);
+		if (pglfd == NULL) {
+			END_PROFILE(syscall_openat);
+			DBG_ERR("Failed to fetch gluster fd\n");
+			return -1;
+		}
+
+		glfd = glfs_openat(pglfd,
+				   smb_fname->base_name,
+				   flags,
+				   how->mode);
+#else
+		/*
+		 * Replace smb_fname with full_path constructed above.
+		 */
+		smb_fname = full_fname;
+#endif
+	}
+
+	if (pglfd == NULL) {
+		/*
+		 * smb_fname can either be a full_path or the same one
+		 * as received from the caller. In the latter case we
+		 * are operating at current working directory.
+		 */
+		if (flags & O_CREAT) {
+			glfd = glfs_creat(handle->data,
+					  smb_fname->base_name,
+					  flags,
+					  how->mode);
+		} else {
+			glfd = glfs_open(handle->data,
+					 smb_fname->base_name,
+					 flags);
+		}
+	}
+
+	if (became_root) {
+		unbecome_root();
+	}
+
+	TALLOC_FREE(full_fname);
+
+	fsp->fsp_flags.have_proc_fds = false;
+
+	if (glfd == NULL) {
+		END_PROFILE(syscall_openat);
+		/* no extension destroy_fn, so no need to save errno */
+		VFS_REMOVE_FSP_EXTENSION(handle, fsp);
+		return -1;
+	}
+
+	*p_tmp = glfd;
+
+	END_PROFILE(syscall_openat);
+	/* An arbitrary value for error reporting, so you know its us. */
+	return 13371337;
+}
+
+static int vfs_gluster_close(struct vfs_handle_struct *handle,
+			     files_struct *fsp)
+{
+	int ret;
+	glfs_fd_t *glfd = NULL;
+
+	START_PROFILE(syscall_close);
+
+	glfd = vfs_gluster_fetch_glfd(handle, fsp);
+	if (glfd == NULL) {
+		END_PROFILE(syscall_close);
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+
+	VFS_REMOVE_FSP_EXTENSION(handle, fsp);
+
+	ret = glfs_close(glfd);
+	END_PROFILE(syscall_close);
+
+	return ret;
+}
+
+static ssize_t vfs_gluster_pread(struct vfs_handle_struct *handle,
+				 files_struct *fsp, void *data, size_t n,
+				 off_t offset)
+{
+	ssize_t ret;
+	glfs_fd_t *glfd = NULL;
+
+	START_PROFILE_BYTES(syscall_pread, n);
+
+	glfd = vfs_gluster_fetch_glfd(handle, fsp);
+	if (glfd == NULL) {
+		END_PROFILE_BYTES(syscall_pread);
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+
+#ifdef HAVE_GFAPI_VER_7_6
+	ret = glfs_pread(glfd, data, n, offset, 0, NULL);
+#else
+	ret = glfs_pread(glfd, data, n, offset, 0);
+#endif
+	END_PROFILE_BYTES(syscall_pread);
+
+	return ret;
+}
+
+struct vfs_gluster_pread_state {
+	ssize_t ret;
+	glfs_fd_t *fd;
+	void *buf;
+	size_t count;
+	off_t offset;
+
+	struct vfs_aio_state vfs_aio_state;
+	SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
+};
+
+static void vfs_gluster_pread_do(void *private_data);
+static void vfs_gluster_pread_done(struct tevent_req *subreq);
+static int vfs_gluster_pread_state_destructor(struct vfs_gluster_pread_state *state);
+
+static struct tevent_req *vfs_gluster_pread_send(struct vfs_handle_struct
+						  *handle, TALLOC_CTX *mem_ctx,
+						  struct tevent_context *ev,
+						  files_struct *fsp,
+						  void *data, size_t n,
+						  off_t offset)
+{
+	struct vfs_gluster_pread_state *state;
+	struct tevent_req *req, *subreq;
+
+	glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
+	if (glfd == NULL) {
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return NULL;
+	}
+
+	req = tevent_req_create(mem_ctx, &state, struct vfs_gluster_pread_state);
+	if (req == NULL) {
+		return NULL;
+	}
+
+	state->ret = -1;
+	state->fd = glfd;
+	state->buf = data;
+	state->count = n;
+	state->offset = offset;
+
+	SMBPROFILE_BYTES_ASYNC_START(syscall_asys_pread, profile_p,
+				     state->profile_bytes, n);
+	SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
+
+	subreq = pthreadpool_tevent_job_send(
+		state, ev, handle->conn->sconn->pool,
+		vfs_gluster_pread_do, state);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq, vfs_gluster_pread_done, req);
+
+	talloc_set_destructor(state, vfs_gluster_pread_state_destructor);
+
+	return req;
+}
+
+static void vfs_gluster_pread_do(void *private_data)
+{
+	struct vfs_gluster_pread_state *state = talloc_get_type_abort(
+		private_data, struct vfs_gluster_pread_state);
+	struct timespec start_time;
+	struct timespec end_time;
+
+	SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
+
+	PROFILE_TIMESTAMP(&start_time);
+
+	do {
+#ifdef HAVE_GFAPI_VER_7_6
+		state->ret = glfs_pread(state->fd, state->buf, state->count,
+					state->offset, 0, NULL);
+#else
+		state->ret = glfs_pread(state->fd, state->buf, state->count,
+					state->offset, 0);
+#endif
+	} while ((state->ret == -1) && (errno == EINTR));
+
+	if (state->ret == -1) {
+		state->vfs_aio_state.error = errno;
+	}
+
+	PROFILE_TIMESTAMP(&end_time);
+
+	state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
+
+	SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
+}
+
+static int vfs_gluster_pread_state_destructor(struct vfs_gluster_pread_state *state)
+{
+	return -1;
+}
+
+static void vfs_gluster_pread_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct vfs_gluster_pread_state *state = tevent_req_data(
+		req, struct vfs_gluster_pread_state);
+	int ret;
+
+	ret = pthreadpool_tevent_job_recv(subreq);
+	TALLOC_FREE(subreq);
+	SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
+	talloc_set_destructor(state, NULL);
+	if (ret != 0) {
+		if (ret != EAGAIN) {
+			tevent_req_error(req, ret);
+			return;
+		}
+		/*
+		 * If we get EAGAIN from pthreadpool_tevent_job_recv() this
+		 * means the lower level pthreadpool failed to create a new
+		 * thread. Fallback to sync processing in that case to allow
+		 * some progress for the client.
+		 */
+		vfs_gluster_pread_do(state);
+	}
+
+	tevent_req_done(req);
+}
+
+static ssize_t vfs_gluster_pread_recv(struct tevent_req *req,
+				      struct vfs_aio_state *vfs_aio_state)
+{
+	struct vfs_gluster_pread_state *state = tevent_req_data(
+		req, struct vfs_gluster_pread_state);
+
+	if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
+		return -1;
+	}
+
+	*vfs_aio_state = state->vfs_aio_state;
+	return state->ret;
+}
+
+struct vfs_gluster_pwrite_state {
+	ssize_t ret;
+	glfs_fd_t *fd;
+	const void *buf;
+	size_t count;
+	off_t offset;
+
+	struct vfs_aio_state vfs_aio_state;
+	SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
+};
+
+static void vfs_gluster_pwrite_do(void *private_data);
+static void vfs_gluster_pwrite_done(struct tevent_req *subreq);
+static int vfs_gluster_pwrite_state_destructor(struct vfs_gluster_pwrite_state *state);
+
+static struct tevent_req *vfs_gluster_pwrite_send(struct vfs_handle_struct
+						  *handle, TALLOC_CTX *mem_ctx,
+						  struct tevent_context *ev,
+						  files_struct *fsp,
+						  const void *data, size_t n,
+						  off_t offset)
+{
+	struct tevent_req *req, *subreq;
+	struct vfs_gluster_pwrite_state *state;
+
+	glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
+	if (glfd == NULL) {
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return NULL;
+	}
+
+	req = tevent_req_create(mem_ctx, &state, struct vfs_gluster_pwrite_state);
+	if (req == NULL) {
+		return NULL;
+	}
+
+	state->ret = -1;
+	state->fd = glfd;
+	state->buf = data;
+	state->count = n;
+	state->offset = offset;
+
+	SMBPROFILE_BYTES_ASYNC_START(syscall_asys_pwrite, profile_p,
+				     state->profile_bytes, n);
+	SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
+
+	subreq = pthreadpool_tevent_job_send(
+		state, ev, handle->conn->sconn->pool,
+		vfs_gluster_pwrite_do, state);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq, vfs_gluster_pwrite_done, req);
+
+	talloc_set_destructor(state, vfs_gluster_pwrite_state_destructor);
+
+	return req;
+}
+
+static void vfs_gluster_pwrite_do(void *private_data)
+{
+	struct vfs_gluster_pwrite_state *state = talloc_get_type_abort(
+		private_data, struct vfs_gluster_pwrite_state);
+	struct timespec start_time;
+	struct timespec end_time;
+
+	SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
+
+	PROFILE_TIMESTAMP(&start_time);
+
+	do {
+#ifdef HAVE_GFAPI_VER_7_6
+		state->ret = glfs_pwrite(state->fd, state->buf, state->count,
+					 state->offset, 0, NULL, NULL);
+#else
+		state->ret = glfs_pwrite(state->fd, state->buf, state->count,
+					 state->offset, 0);
+#endif
+	} while ((state->ret == -1) && (errno == EINTR));
+
+	if (state->ret == -1) {
+		state->vfs_aio_state.error = errno;
+	}
+
+	PROFILE_TIMESTAMP(&end_time);
+
+	state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
+
+	SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
+}
+
+static int vfs_gluster_pwrite_state_destructor(struct vfs_gluster_pwrite_state *state)
+{
+	return -1;
+}
+
+static void vfs_gluster_pwrite_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct vfs_gluster_pwrite_state *state = tevent_req_data(
+		req, struct vfs_gluster_pwrite_state);
+	int ret;
+
+	ret = pthreadpool_tevent_job_recv(subreq);
+	TALLOC_FREE(subreq);
+	SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
+	talloc_set_destructor(state, NULL);
+	if (ret != 0) {
+		if (ret != EAGAIN) {
+			tevent_req_error(req, ret);
+			return;
+		}
+		/*
+		 * If we get EAGAIN from pthreadpool_tevent_job_recv() this
+		 * means the lower level pthreadpool failed to create a new
+		 * thread. Fallback to sync processing in that case to allow
+		 * some progress for the client.
+		 */
+		vfs_gluster_pwrite_do(state);
+	}
+
+	tevent_req_done(req);
+}
+
+static ssize_t vfs_gluster_pwrite_recv(struct tevent_req *req,
+				       struct vfs_aio_state *vfs_aio_state)
+{
+	struct vfs_gluster_pwrite_state *state = tevent_req_data(
+		req, struct vfs_gluster_pwrite_state);
+
+	if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
+		return -1;
+	}
+
+	*vfs_aio_state = state->vfs_aio_state;
+
+	return state->ret;
+}
+
+static ssize_t vfs_gluster_pwrite(struct vfs_handle_struct *handle,
+				  files_struct *fsp, const void *data,
+				  size_t n, off_t offset)
+{
+	ssize_t ret;
+	glfs_fd_t *glfd = NULL;
+
+	START_PROFILE_BYTES(syscall_pwrite, n);
+
+	glfd = vfs_gluster_fetch_glfd(handle, fsp);
+	if (glfd == NULL) {
+		END_PROFILE_BYTES(syscall_pwrite);
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+
+#ifdef HAVE_GFAPI_VER_7_6
+	ret = glfs_pwrite(glfd, data, n, offset, 0, NULL, NULL);
+#else
+	ret = glfs_pwrite(glfd, data, n, offset, 0);
+#endif
+	END_PROFILE_BYTES(syscall_pwrite);
+
+	return ret;
+}
+
+static off_t vfs_gluster_lseek(struct vfs_handle_struct *handle,
+			       files_struct *fsp, off_t offset, int whence)
+{
+	off_t ret = 0;
+	glfs_fd_t *glfd = NULL;
+
+	START_PROFILE(syscall_lseek);
+
+	glfd = vfs_gluster_fetch_glfd(handle, fsp);
+	if (glfd == NULL) {
+		END_PROFILE(syscall_lseek);
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+
+	ret = glfs_lseek(glfd, offset, whence);
+	END_PROFILE(syscall_lseek);
+
+	return ret;
+}
+
+static ssize_t vfs_gluster_sendfile(struct vfs_handle_struct *handle, int tofd,
+				    files_struct *fromfsp,
+				    const DATA_BLOB *hdr,
+				    off_t offset, size_t n)
+{
+	errno = ENOTSUP;
+	return -1;
+}
+
+static ssize_t vfs_gluster_recvfile(struct vfs_handle_struct *handle,
+				    int fromfd, files_struct *tofsp,
+				    off_t offset, size_t n)
+{
+	errno = ENOTSUP;
+	return -1;
+}
+
+static int vfs_gluster_renameat(struct vfs_handle_struct *handle,
+			files_struct *srcfsp,
+			const struct smb_filename *smb_fname_src,
+			files_struct *dstfsp,
+			const struct smb_filename *smb_fname_dst)
+{
+	int ret;
+
+#ifdef HAVE_GFAPI_VER_7_11
+	glfs_fd_t *src_pglfd = NULL;
+	glfs_fd_t *dst_pglfd = NULL;
+
+	START_PROFILE(syscall_renameat);
+
+	src_pglfd = vfs_gluster_fetch_glfd(handle, srcfsp);
+	if (src_pglfd == NULL) {
+		END_PROFILE(syscall_renameat);
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+
+	dst_pglfd = vfs_gluster_fetch_glfd(handle, dstfsp);
+	if (dst_pglfd == NULL) {
+		END_PROFILE(syscall_renameat);
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+
+	ret = glfs_renameat(src_pglfd, smb_fname_src->base_name,
+			    dst_pglfd, smb_fname_dst->base_name);
+#else
+	struct smb_filename *full_fname_src = NULL;
+	struct smb_filename *full_fname_dst = NULL;
+
+	START_PROFILE(syscall_renameat);
+
+	full_fname_src = full_path_from_dirfsp_atname(talloc_tos(),
+						      srcfsp,
+						      smb_fname_src);
+	if (full_fname_src == NULL) {
+		END_PROFILE(syscall_renameat);
+		errno = ENOMEM;
+		return -1;
+	}
+
+	full_fname_dst = full_path_from_dirfsp_atname(talloc_tos(),
+						      dstfsp,
+						      smb_fname_dst);
+	if (full_fname_dst == NULL) {
+		END_PROFILE(syscall_renameat);
+		TALLOC_FREE(full_fname_src);
+		errno = ENOMEM;
+		return -1;
+	}
+	ret = glfs_rename(handle->data,
+			  full_fname_src->base_name,
+			  full_fname_dst->base_name);
+
+	TALLOC_FREE(full_fname_src);
+	TALLOC_FREE(full_fname_dst);
+#endif
+
+	END_PROFILE(syscall_renameat);
+
+	return ret;
+}
+
+struct vfs_gluster_fsync_state {
+	ssize_t ret;
+	glfs_fd_t *fd;
+
+	struct vfs_aio_state vfs_aio_state;
+	SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
+};
+
+static void vfs_gluster_fsync_do(void *private_data);
+static void vfs_gluster_fsync_done(struct tevent_req *subreq);
+static int vfs_gluster_fsync_state_destructor(struct vfs_gluster_fsync_state *state);
+
+static struct tevent_req *vfs_gluster_fsync_send(struct vfs_handle_struct
+						 *handle, TALLOC_CTX *mem_ctx,
+						 struct tevent_context *ev,
+						 files_struct *fsp)
+{
+	struct tevent_req *req, *subreq;
+	struct vfs_gluster_fsync_state *state;
+
+	glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
+	if (glfd == NULL) {
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return NULL;
+	}
+
+	req = tevent_req_create(mem_ctx, &state, struct vfs_gluster_fsync_state);
+	if (req == NULL) {
+		return NULL;
+	}
+
+	state->ret = -1;
+	state->fd = glfd;
+
+	SMBPROFILE_BYTES_ASYNC_START(syscall_asys_fsync, profile_p,
+                                     state->profile_bytes, 0);
+	SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
+
+	subreq = pthreadpool_tevent_job_send(
+		state, ev, handle->conn->sconn->pool, vfs_gluster_fsync_do, state);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq, vfs_gluster_fsync_done, req);
+
+	talloc_set_destructor(state, vfs_gluster_fsync_state_destructor);
+
+	return req;
+}
+
+static void vfs_gluster_fsync_do(void *private_data)
+{
+	struct vfs_gluster_fsync_state *state = talloc_get_type_abort(
+		private_data, struct vfs_gluster_fsync_state);
+	struct timespec start_time;
+	struct timespec end_time;
+
+	SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
+
+	PROFILE_TIMESTAMP(&start_time);
+
+	do {
+#ifdef HAVE_GFAPI_VER_7_6
+		state->ret = glfs_fsync(state->fd, NULL, NULL);
+#else
+		state->ret = glfs_fsync(state->fd);
+#endif
+	} while ((state->ret == -1) && (errno == EINTR));
+
+	if (state->ret == -1) {
+		state->vfs_aio_state.error = errno;
+	}
+
+	PROFILE_TIMESTAMP(&end_time);
+
+	state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
+
+	SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
+}
+
+static int vfs_gluster_fsync_state_destructor(struct vfs_gluster_fsync_state *state)
+{
+	return -1;
+}
+
+static void vfs_gluster_fsync_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct vfs_gluster_fsync_state *state = tevent_req_data(
+		req, struct vfs_gluster_fsync_state);
+	int ret;
+
+	ret = pthreadpool_tevent_job_recv(subreq);
+	TALLOC_FREE(subreq);
+	SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
+	talloc_set_destructor(state, NULL);
+	if (ret != 0) {
+		if (ret != EAGAIN) {
+			tevent_req_error(req, ret);
+			return;
+		}
+		/*
+		 * If we get EAGAIN from pthreadpool_tevent_job_recv() this
+		 * means the lower level pthreadpool failed to create a new
+		 * thread. Fallback to sync processing in that case to allow
+		 * some progress for the client.
+		 */
+		vfs_gluster_fsync_do(state);
+	}
+
+	tevent_req_done(req);
+}
+
+static int vfs_gluster_fsync_recv(struct tevent_req *req,
+				  struct vfs_aio_state *vfs_aio_state)
+{
+	struct vfs_gluster_fsync_state *state = tevent_req_data(
+		req, struct vfs_gluster_fsync_state);
+
+	if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
+		return -1;
+	}
+
+	*vfs_aio_state = state->vfs_aio_state;
+	return state->ret;
+}
+
+static int vfs_gluster_stat(struct vfs_handle_struct *handle,
+			    struct smb_filename *smb_fname)
+{
+	struct stat st;
+	int ret;
+
+	START_PROFILE(syscall_stat);
+	ret = glfs_stat(handle->data, smb_fname->base_name, &st);
+	if (ret == 0) {
+		smb_stat_ex_from_stat(&smb_fname->st, &st);
+	}
+	if (ret < 0 && errno != ENOENT) {
+		DEBUG(0, ("glfs_stat(%s) failed: %s\n",
+			  smb_fname->base_name, strerror(errno)));
+	}
+	END_PROFILE(syscall_stat);
+
+	return ret;
+}
+
+static int vfs_gluster_fstat(struct vfs_handle_struct *handle,
+			     files_struct *fsp, SMB_STRUCT_STAT *sbuf)
+{
+	struct stat st;
+	int ret;
+	glfs_fd_t *glfd = NULL;
+
+	START_PROFILE(syscall_fstat);
+
+	glfd = vfs_gluster_fetch_glfd(handle, fsp);
+	if (glfd == NULL) {
+		END_PROFILE(syscall_fstat);
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+
+	ret = glfs_fstat(glfd, &st);
+	if (ret == 0) {
+		smb_stat_ex_from_stat(sbuf, &st);
+	}
+	if (ret < 0) {
+		DEBUG(0, ("glfs_fstat(%d) failed: %s\n",
+			  fsp_get_io_fd(fsp), strerror(errno)));
+	}
+	END_PROFILE(syscall_fstat);
+
+	return ret;
+}
+
+static int vfs_gluster_fstatat(struct vfs_handle_struct *handle,
+			       const struct files_struct *dirfsp,
+			       const struct smb_filename *smb_fname,
+			       SMB_STRUCT_STAT *sbuf,
+			       int flags)
+{
+	struct stat st;
+	int ret;
+
+#ifdef HAVE_GFAPI_VER_7_11
+	glfs_fd_t *pglfd = NULL;
+
+	START_PROFILE(syscall_fstatat);
+
+	pglfd = vfs_gluster_fetch_glfd(handle, dirfsp);
+	if (pglfd == NULL) {
+		END_PROFILE(syscall_fstatat);
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+
+	ret = glfs_fstatat(pglfd, smb_fname->base_name, &st, flags);
+#else
+	struct smb_filename *full_fname = NULL;
+
+	START_PROFILE(syscall_fstatat);
+
+	full_fname = full_path_from_dirfsp_atname(talloc_tos(),
+						  dirfsp,
+						  smb_fname);
+	if (full_fname == NULL) {
+		END_PROFILE(syscall_fstatat);
+		return -1;
+	}
+
+	ret = glfs_stat(handle->data, full_fname->base_name, &st);
+
+	TALLOC_FREE(full_fname->base_name);
+#endif
+
+	if (ret == 0) {
+		smb_stat_ex_from_stat(sbuf, &st);
+	}
+
+	END_PROFILE(syscall_fstatat);
+
+	return ret;
+}
+
+static int vfs_gluster_lstat(struct vfs_handle_struct *handle,
+			     struct smb_filename *smb_fname)
+{
+	struct stat st;
+	int ret;
+
+	START_PROFILE(syscall_lstat);
+	ret = glfs_lstat(handle->data, smb_fname->base_name, &st);
+	if (ret == 0) {
+		smb_stat_ex_from_stat(&smb_fname->st, &st);
+	}
+	if (ret < 0 && errno != ENOENT) {
+		DEBUG(0, ("glfs_lstat(%s) failed: %s\n",
+			  smb_fname->base_name, strerror(errno)));
+	}
+	END_PROFILE(syscall_lstat);
+
+	return ret;
+}
+
+static uint64_t vfs_gluster_get_alloc_size(struct vfs_handle_struct *handle,
+					   files_struct *fsp,
+					   const SMB_STRUCT_STAT *sbuf)
+{
+	uint64_t ret;
+
+	START_PROFILE(syscall_get_alloc_size);
+	ret = sbuf->st_ex_blocks * 512;
+	END_PROFILE(syscall_get_alloc_size);
+
+	return ret;
+}
+
+static int vfs_gluster_unlinkat(struct vfs_handle_struct *handle,
+			struct files_struct *dirfsp,
+			const struct smb_filename *smb_fname,
+			int flags)
+{
+	int ret;
+
+#ifdef HAVE_GFAPI_VER_7_11
+	glfs_fd_t *pglfd = NULL;
+
+	START_PROFILE(syscall_unlinkat);
+
+	pglfd = vfs_gluster_fetch_glfd(handle, dirfsp);
+	if (pglfd == NULL) {
+		END_PROFILE(syscall_unlinkat);
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+
+	ret = glfs_unlinkat(pglfd, smb_fname->base_name, flags);
+#else
+	struct smb_filename *full_fname = NULL;
+
+	START_PROFILE(syscall_unlinkat);
+
+	full_fname = full_path_from_dirfsp_atname(talloc_tos(),
+						  dirfsp,
+						  smb_fname);
+	if (full_fname == NULL) {
+		END_PROFILE(syscall_unlinkat);
+		return -1;
+	}
+
+	if (flags & AT_REMOVEDIR) {
+		ret = glfs_rmdir(handle->data, full_fname->base_name);
+	} else {
+		ret = glfs_unlink(handle->data, full_fname->base_name);
+	}
+
+	TALLOC_FREE(full_fname);
+#endif
+
+	END_PROFILE(syscall_unlinkat);
+
+	return ret;
+}
+
+static int vfs_gluster_fchmod(struct vfs_handle_struct *handle,
+			      files_struct *fsp, mode_t mode)
+{
+	int ret;
+	glfs_fd_t *glfd = NULL;
+
+	START_PROFILE(syscall_fchmod);
+
+	glfd = vfs_gluster_fetch_glfd(handle, fsp);
+	if (glfd == NULL) {
+		END_PROFILE(syscall_fchmod);
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+
+	if (!fsp->fsp_flags.is_pathref) {
+		/*
+		 * We can use an io_fd to remove xattrs.
+		 */
+		ret = glfs_fchmod(glfd, mode);
+	} else {
+		/*
+		 * This is no longer a handle based call.
+		 */
+		ret = glfs_chmod(handle->data, fsp->fsp_name->base_name, mode);
+	}
+	END_PROFILE(syscall_fchmod);
+
+	return ret;
+}
+
+static int vfs_gluster_fchown(struct vfs_handle_struct *handle,
+			      files_struct *fsp, uid_t uid, gid_t gid)
+{
+	int ret;
+	glfs_fd_t *glfd = NULL;
+
+	START_PROFILE(syscall_fchown);
+
+	glfd = vfs_gluster_fetch_glfd(handle, fsp);
+	if (glfd == NULL) {
+		END_PROFILE(syscall_fchown);
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+
+	ret = glfs_fchown(glfd, uid, gid);
+	END_PROFILE(syscall_fchown);
+
+	return ret;
+}
+
+static int vfs_gluster_lchown(struct vfs_handle_struct *handle,
+			const struct smb_filename *smb_fname,
+			uid_t uid,
+			gid_t gid)
+{
+	int ret;
+
+	START_PROFILE(syscall_lchown);
+	ret = glfs_lchown(handle->data, smb_fname->base_name, uid, gid);
+	END_PROFILE(syscall_lchown);
+
+	return ret;
+}
+
+static int vfs_gluster_chdir(struct vfs_handle_struct *handle,
+			const struct smb_filename *smb_fname)
+{
+	int ret;
+
+	START_PROFILE(syscall_chdir);
+	ret = glfs_chdir(handle->data, smb_fname->base_name);
+	END_PROFILE(syscall_chdir);
+
+	return ret;
+}
+
+static struct smb_filename *vfs_gluster_getwd(struct vfs_handle_struct *handle,
+				TALLOC_CTX *ctx)
+{
+	char cwd[PATH_MAX] = { '\0' };
+	char *ret;
+	struct smb_filename *smb_fname = NULL;
+
+	START_PROFILE(syscall_getwd);
+
+	ret = glfs_getcwd(handle->data, cwd, PATH_MAX - 1);
+	END_PROFILE(syscall_getwd);
+
+	if (ret == NULL) {
+		return NULL;
+	}
+	smb_fname = synthetic_smb_fname(ctx,
+					ret,
+					NULL,
+					NULL,
+					0,
+					0);
+	return smb_fname;
+}
+
+static int vfs_gluster_fntimes(struct vfs_handle_struct *handle,
+			       files_struct *fsp,
+			       struct smb_file_time *ft)
+{
+	int ret = -1;
+	struct timespec times[2];
+	glfs_fd_t *glfd = NULL;
+
+	START_PROFILE(syscall_fntimes);
+
+	if (is_omit_timespec(&ft->atime)) {
+		times[0].tv_sec = fsp->fsp_name->st.st_ex_atime.tv_sec;
+		times[0].tv_nsec = fsp->fsp_name->st.st_ex_atime.tv_nsec;
+	} else {
+		times[0].tv_sec = ft->atime.tv_sec;
+		times[0].tv_nsec = ft->atime.tv_nsec;
+	}
+
+	if (is_omit_timespec(&ft->mtime)) {
+		times[1].tv_sec = fsp->fsp_name->st.st_ex_mtime.tv_sec;
+		times[1].tv_nsec = fsp->fsp_name->st.st_ex_mtime.tv_nsec;
+	} else {
+		times[1].tv_sec = ft->mtime.tv_sec;
+		times[1].tv_nsec = ft->mtime.tv_nsec;
+	}
+
+	if ((timespec_compare(&times[0],
+			      &fsp->fsp_name->st.st_ex_atime) == 0) &&
+	    (timespec_compare(&times[1],
+			      &fsp->fsp_name->st.st_ex_mtime) == 0)) {
+		END_PROFILE(syscall_fntimes);
+		return 0;
+	}
+
+	glfd = vfs_gluster_fetch_glfd(handle, fsp);
+	if (glfd == NULL) {
+		END_PROFILE(syscall_fntimes);
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+
+	if (!fsp->fsp_flags.is_pathref) {
+		ret = glfs_futimens(glfd, times);
+	} else {
+		ret = glfs_utimens(handle->data,
+				   fsp->fsp_name->base_name,
+				   times);
+	}
+	END_PROFILE(syscall_fntimes);
+
+	return ret;
+}
+
+static int vfs_gluster_ftruncate(struct vfs_handle_struct *handle,
+				 files_struct *fsp, off_t offset)
+{
+	int ret;
+	glfs_fd_t *glfd = NULL;
+
+	START_PROFILE(syscall_ftruncate);
+
+	glfd = vfs_gluster_fetch_glfd(handle, fsp);
+	if (glfd == NULL) {
+		END_PROFILE(syscall_ftruncate);
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+
+#ifdef HAVE_GFAPI_VER_7_6
+	ret = glfs_ftruncate(glfd, offset, NULL, NULL);
+#else
+	ret = glfs_ftruncate(glfd, offset);
+#endif
+	END_PROFILE(syscall_ftruncate);
+
+	return ret;
+}
+
+static int vfs_gluster_fallocate(struct vfs_handle_struct *handle,
+				 struct files_struct *fsp,
+				 uint32_t mode,
+				 off_t offset, off_t len)
+{
+	int ret;
+#ifdef HAVE_GFAPI_VER_6
+	glfs_fd_t *glfd = NULL;
+	int keep_size, punch_hole;
+
+	START_PROFILE(syscall_fallocate);
+
+	glfd = vfs_gluster_fetch_glfd(handle, fsp);
+	if (glfd == NULL) {
+		END_PROFILE(syscall_fallocate);
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+
+	keep_size = mode & VFS_FALLOCATE_FL_KEEP_SIZE;
+	punch_hole = mode & VFS_FALLOCATE_FL_PUNCH_HOLE;
+
+	mode &= ~(VFS_FALLOCATE_FL_KEEP_SIZE|VFS_FALLOCATE_FL_PUNCH_HOLE);
+	if (mode != 0) {
+		END_PROFILE(syscall_fallocate);
+		errno = ENOTSUP;
+		return -1;
+	}
+
+	if (punch_hole) {
+		ret = glfs_discard(glfd, offset, len);
+		if (ret != 0) {
+			DBG_DEBUG("glfs_discard failed: %s\n",
+				  strerror(errno));
+		}
+	}
+
+	ret = glfs_fallocate(glfd, keep_size, offset, len);
+	END_PROFILE(syscall_fallocate);
+#else
+	errno = ENOTSUP;
+	ret = -1;
+#endif
+	return ret;
+}
+
+static struct smb_filename *vfs_gluster_realpath(struct vfs_handle_struct *handle,
+				TALLOC_CTX *ctx,
+				const struct smb_filename *smb_fname)
+{
+	char *result = NULL;
+	struct smb_filename *result_fname = NULL;
+	char *resolved_path = NULL;
+
+	START_PROFILE(syscall_realpath);
+
+	resolved_path = SMB_MALLOC_ARRAY(char, PATH_MAX+1);
+	if (resolved_path == NULL) {
+		END_PROFILE(syscall_realpath);
+		errno = ENOMEM;
+		return NULL;
+	}
+
+	result = glfs_realpath(handle->data,
+			smb_fname->base_name,
+			resolved_path);
+	if (result != NULL) {
+		result_fname = synthetic_smb_fname(ctx,
+						   result,
+						   NULL,
+						   NULL,
+						   0,
+						   0);
+	}
+
+	SAFE_FREE(resolved_path);
+	END_PROFILE(syscall_realpath);
+
+	return result_fname;
+}
+
+static bool vfs_gluster_lock(struct vfs_handle_struct *handle,
+			     files_struct *fsp, int op, off_t offset,
+			     off_t count, int type)
+{
+	struct flock flock = { 0, };
+	int ret;
+	glfs_fd_t *glfd = NULL;
+	bool ok = false;
+
+	START_PROFILE(syscall_fcntl_lock);
+
+	glfd = vfs_gluster_fetch_glfd(handle, fsp);
+	if (glfd == NULL) {
+		DBG_ERR("Failed to fetch gluster fd\n");
+		ok = false;
+		goto out;
+	}
+
+	flock.l_type = type;
+	flock.l_whence = SEEK_SET;
+	flock.l_start = offset;
+	flock.l_len = count;
+	flock.l_pid = 0;
+
+	ret = glfs_posix_lock(glfd, op, &flock);
+
+	if (op == F_GETLK) {
+		/* lock query, true if someone else has locked */
+		if ((ret != -1) &&
+		    (flock.l_type != F_UNLCK) &&
+		    (flock.l_pid != 0) && (flock.l_pid != getpid())) {
+			ok = true;
+			goto out;
+		}
+		/* not me */
+		ok = false;
+		goto out;
+	}
+
+	if (ret == -1) {
+		ok = false;
+		goto out;
+	}
+
+	ok = true;
+out:
+	END_PROFILE(syscall_fcntl_lock);
+
+	return ok;
+}
+
+static int vfs_gluster_filesystem_sharemode(struct vfs_handle_struct *handle,
+					    files_struct *fsp,
+					    uint32_t share_access,
+					    uint32_t access_mask)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int vfs_gluster_fcntl(vfs_handle_struct *handle,
+			     files_struct *fsp, int cmd, va_list cmd_arg)
+{
+	/*
+	 * SMB_VFS_FCNTL() is currently only called by vfs_set_blocking() to
+	 * clear O_NONBLOCK, etc for LOCK_MAND and FIFOs. Ignore it.
+	 */
+	if (cmd == F_GETFL) {
+		return 0;
+	} else if (cmd == F_SETFL) {
+		va_list dup_cmd_arg;
+		int opt;
+
+		va_copy(dup_cmd_arg, cmd_arg);
+		opt = va_arg(dup_cmd_arg, int);
+		va_end(dup_cmd_arg);
+		if (opt == 0) {
+			return 0;
+		}
+		DBG_ERR("unexpected fcntl SETFL(%d)\n", opt);
+		goto err_out;
+	}
+	DBG_ERR("unexpected fcntl: %d\n", cmd);
+err_out:
+	errno = EINVAL;
+	return -1;
+}
+
+static int vfs_gluster_linux_setlease(struct vfs_handle_struct *handle,
+				      files_struct *fsp, int leasetype)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static bool vfs_gluster_getlock(struct vfs_handle_struct *handle,
+				files_struct *fsp, off_t *poffset,
+				off_t *pcount, int *ptype, pid_t *ppid)
+{
+	struct flock flock = { 0, };
+	int ret;
+	glfs_fd_t *glfd = NULL;
+
+	START_PROFILE(syscall_fcntl_getlock);
+
+	glfd = vfs_gluster_fetch_glfd(handle, fsp);
+	if (glfd == NULL) {
+		END_PROFILE(syscall_fcntl_getlock);
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return false;
+	}
+
+	flock.l_type = *ptype;
+	flock.l_whence = SEEK_SET;
+	flock.l_start = *poffset;
+	flock.l_len = *pcount;
+	flock.l_pid = 0;
+
+	ret = glfs_posix_lock(glfd, F_GETLK, &flock);
+
+	if (ret == -1) {
+		END_PROFILE(syscall_fcntl_getlock);
+		return false;
+	}
+
+	*ptype = flock.l_type;
+	*poffset = flock.l_start;
+	*pcount = flock.l_len;
+	*ppid = flock.l_pid;
+	END_PROFILE(syscall_fcntl_getlock);
+
+	return true;
+}
+
+static int vfs_gluster_symlinkat(struct vfs_handle_struct *handle,
+				const struct smb_filename *link_target,
+				struct files_struct *dirfsp,
+				const struct smb_filename *new_smb_fname)
+{
+	int ret;
+
+#ifdef HAVE_GFAPI_VER_7_11
+	glfs_fd_t *pglfd = NULL;
+
+	START_PROFILE(syscall_symlinkat);
+
+	pglfd = vfs_gluster_fetch_glfd(handle, dirfsp);
+	if (pglfd == NULL) {
+		END_PROFILE(syscall_symlinkat);
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+
+	ret = glfs_symlinkat(link_target->base_name,
+			     pglfd,
+			     new_smb_fname->base_name);
+#else
+	struct smb_filename *full_fname = NULL;
+
+	START_PROFILE(syscall_symlinkat);
+
+	full_fname = full_path_from_dirfsp_atname(talloc_tos(),
+						  dirfsp,
+						  new_smb_fname);
+	if (full_fname == NULL) {
+		END_PROFILE(syscall_symlinkat);
+		return -1;
+	}
+
+	ret = glfs_symlink(handle->data,
+			   link_target->base_name,
+			   full_fname->base_name);
+
+	TALLOC_FREE(full_fname);
+#endif
+
+	END_PROFILE(syscall_symlinkat);
+
+	return ret;
+}
+
+static int vfs_gluster_readlinkat(struct vfs_handle_struct *handle,
+				const struct files_struct *dirfsp,
+				const struct smb_filename *smb_fname,
+				char *buf,
+				size_t bufsiz)
+{
+	int ret;
+
+#ifdef HAVE_GFAPI_VER_7_11
+	glfs_fd_t *pglfd = NULL;
+
+	START_PROFILE(syscall_readlinkat);
+
+	pglfd = vfs_gluster_fetch_glfd(handle, dirfsp);
+	if (pglfd == NULL) {
+		END_PROFILE(syscall_readlinkat);
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+
+	ret = glfs_readlinkat(pglfd, smb_fname->base_name, buf, bufsiz);
+#else
+	struct smb_filename *full_fname = NULL;
+
+	START_PROFILE(syscall_readlinkat);
+
+	full_fname = full_path_from_dirfsp_atname(talloc_tos(),
+						  dirfsp,
+						  smb_fname);
+	if (full_fname == NULL) {
+		END_PROFILE(syscall_readlinkat);
+		return -1;
+	}
+
+	ret = glfs_readlink(handle->data, full_fname->base_name, buf, bufsiz);
+
+	TALLOC_FREE(full_fname);
+#endif
+
+	END_PROFILE(syscall_readlinkat);
+
+	return ret;
+}
+
+static int vfs_gluster_linkat(struct vfs_handle_struct *handle,
+				files_struct *srcfsp,
+				const struct smb_filename *old_smb_fname,
+				files_struct *dstfsp,
+				const struct smb_filename *new_smb_fname,
+				int flags)
+{
+	int ret;
+
+#ifdef HAVE_GFAPI_VER_7_11
+	glfs_fd_t *src_pglfd = NULL;
+	glfs_fd_t *dst_pglfd = NULL;
+
+	START_PROFILE(syscall_linkat);
+
+	src_pglfd = vfs_gluster_fetch_glfd(handle, srcfsp);
+	if (src_pglfd == NULL) {
+		END_PROFILE(syscall_linkat);
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+
+	dst_pglfd = vfs_gluster_fetch_glfd(handle, dstfsp);
+	if (dst_pglfd == NULL) {
+		END_PROFILE(syscall_linkat);
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+
+	ret = glfs_linkat(src_pglfd,
+			  old_smb_fname->base_name,
+			  dst_pglfd,
+			  new_smb_fname->base_name,
+			  flags);
+#else
+	struct smb_filename *full_fname_old = NULL;
+	struct smb_filename *full_fname_new = NULL;
+
+	START_PROFILE(syscall_linkat);
+
+	full_fname_old = full_path_from_dirfsp_atname(talloc_tos(),
+						      srcfsp,
+						      old_smb_fname);
+	if (full_fname_old == NULL) {
+		END_PROFILE(syscall_linkat);
+		return -1;
+	}
+
+	full_fname_new = full_path_from_dirfsp_atname(talloc_tos(),
+						      dstfsp,
+						      new_smb_fname);
+	if (full_fname_new == NULL) {
+		END_PROFILE(syscall_linkat);
+		TALLOC_FREE(full_fname_old);
+		return -1;
+	}
+
+	ret = glfs_link(handle->data,
+			full_fname_old->base_name,
+			full_fname_new->base_name);
+
+	TALLOC_FREE(full_fname_old);
+	TALLOC_FREE(full_fname_new);
+#endif
+
+	END_PROFILE(syscall_linkat);
+
+	return ret;
+}
+
+static int vfs_gluster_mknodat(struct vfs_handle_struct *handle,
+				files_struct *dirfsp,
+				const struct smb_filename *smb_fname,
+				mode_t mode,
+				SMB_DEV_T dev)
+{
+	int ret;
+
+#ifdef HAVE_GFAPI_VER_7_11
+	glfs_fd_t *pglfd = NULL;
+
+	START_PROFILE(syscall_mknodat);
+
+	pglfd = vfs_gluster_fetch_glfd(handle, dirfsp);
+	if (pglfd == NULL) {
+		END_PROFILE(syscall_mknodat);
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+
+	ret = glfs_mknodat(pglfd, smb_fname->base_name, mode, dev);
+#else
+	struct smb_filename *full_fname = NULL;
+
+	START_PROFILE(syscall_mknodat);
+
+	full_fname = full_path_from_dirfsp_atname(talloc_tos(),
+						  dirfsp,
+						  smb_fname);
+	if (full_fname == NULL) {
+		END_PROFILE(syscall_mknodat);
+		return -1;
+	}
+
+	ret = glfs_mknod(handle->data, full_fname->base_name, mode, dev);
+
+	TALLOC_FREE(full_fname);
+#endif
+
+	END_PROFILE(syscall_mknodat);
+
+	return ret;
+}
+
+static int vfs_gluster_fchflags(struct vfs_handle_struct *handle,
+				struct files_struct *fsp,
+				unsigned int flags)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static NTSTATUS vfs_gluster_get_real_filename_at(
+	struct vfs_handle_struct *handle,
+	struct files_struct *dirfsp,
+	const char *name,
+	TALLOC_CTX *mem_ctx,
+	char **found_name)
+{
+	int ret;
+	char key_buf[GLUSTER_NAME_MAX + 64];
+	char val_buf[GLUSTER_NAME_MAX + 1];
+
+	if (strlen(name) >= GLUSTER_NAME_MAX) {
+		return NT_STATUS_OBJECT_NAME_INVALID;
+	}
+
+	snprintf(key_buf, GLUSTER_NAME_MAX + 64,
+		 "glusterfs.get_real_filename:%s", name);
+
+	ret = glfs_getxattr(handle->data,
+			    dirfsp->fsp_name->base_name,
+			    key_buf,
+			    val_buf,
+			    GLUSTER_NAME_MAX + 1);
+	if (ret == -1) {
+		if (errno == ENOATTR) {
+			errno = ENOENT;
+		}
+		return map_nt_error_from_unix(errno);
+	}
+
+	*found_name = talloc_strdup(mem_ctx, val_buf);
+	if (found_name[0] == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	return NT_STATUS_OK;
+}
+
+static const char *vfs_gluster_connectpath(
+	struct vfs_handle_struct *handle,
+	const struct files_struct *dirfsp,
+	const struct smb_filename *smb_fname)
+{
+	return handle->conn->connectpath;
+}
+
+/* EA Operations */
+
+static ssize_t vfs_gluster_fgetxattr(struct vfs_handle_struct *handle,
+				     files_struct *fsp, const char *name,
+				     void *value, size_t size)
+{
+	glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
+	if (glfd == NULL) {
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+
+	if (!fsp->fsp_flags.is_pathref) {
+		/*
+		 * We can use an io_fd to retrieve xattr value.
+		 */
+		return glfs_fgetxattr(glfd, name, value, size);
+	}
+
+	/*
+	 * This is no longer a handle based call.
+	 */
+	return glfs_getxattr(handle->data,
+			     fsp->fsp_name->base_name,
+			     name,
+			     value,
+			     size);
+}
+
+static ssize_t vfs_gluster_flistxattr(struct vfs_handle_struct *handle,
+				      files_struct *fsp, char *list,
+				      size_t size)
+{
+	glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
+	if (glfd == NULL) {
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+	if (!fsp->fsp_flags.is_pathref) {
+		/*
+		 * We can use an io_fd to list xattrs.
+		 */
+		return glfs_flistxattr(glfd, list, size);
+	} else {
+		/*
+		 * This is no longer a handle based call.
+		 */
+		return glfs_listxattr(handle->data,
+				fsp->fsp_name->base_name,
+				list,
+				size);
+	}
+}
+
+static int vfs_gluster_fremovexattr(struct vfs_handle_struct *handle,
+				    files_struct *fsp, const char *name)
+{
+	glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
+	if (glfd == NULL) {
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+	if (!fsp->fsp_flags.is_pathref) {
+		/*
+		 * We can use an io_fd to remove xattrs.
+		 */
+		return glfs_fremovexattr(glfd, name);
+	} else {
+		/*
+		 * This is no longer a handle based call.
+		 */
+		return glfs_removexattr(handle->data,
+				fsp->fsp_name->base_name,
+				name);
+	}
+}
+
+static int vfs_gluster_fsetxattr(struct vfs_handle_struct *handle,
+				 files_struct *fsp, const char *name,
+				 const void *value, size_t size, int flags)
+{
+	glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
+	if (glfd == NULL) {
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return -1;
+	}
+
+	if (!fsp->fsp_flags.is_pathref) {
+		/*
+		 * We can use an io_fd to set xattrs.
+		 */
+		return glfs_fsetxattr(glfd, name, value, size, flags);
+	} else {
+		/*
+		 * This is no longer a handle based call.
+		 */
+		return glfs_setxattr(handle->data,
+				fsp->fsp_name->base_name,
+				name,
+				value,
+				size,
+				flags);
+	}
+}
+
+/* AIO Operations */
+
+static bool vfs_gluster_aio_force(struct vfs_handle_struct *handle,
+				  files_struct *fsp)
+{
+	return false;
+}
+
+static NTSTATUS vfs_gluster_create_dfs_pathat(struct vfs_handle_struct *handle,
+				struct files_struct *dirfsp,
+				const struct smb_filename *smb_fname,
+				const struct referral *reflist,
+				size_t referral_count)
+{
+	TALLOC_CTX *frame = talloc_stackframe();
+	NTSTATUS status = NT_STATUS_NO_MEMORY;
+	int ret;
+	char *msdfs_link = NULL;
+#ifdef HAVE_GFAPI_VER_7_11
+	glfs_fd_t *pglfd = NULL;
+#else
+	struct smb_filename *full_fname = NULL;
+#endif
+
+	/* Form the msdfs_link contents */
+	msdfs_link = msdfs_link_string(frame,
+					reflist,
+					referral_count);
+	if (msdfs_link == NULL) {
+		goto out;
+	}
+
+#ifdef HAVE_GFAPI_VER_7_11
+	pglfd = vfs_gluster_fetch_glfd(handle, dirfsp);
+	if (pglfd == NULL) {
+		DBG_ERR("Failed to fetch gluster fd\n");
+		status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
+		goto out;
+	}
+
+	ret = glfs_symlinkat(msdfs_link, pglfd, smb_fname->base_name);
+#else
+	full_fname = full_path_from_dirfsp_atname(talloc_tos(),
+						  dirfsp,
+						  smb_fname);
+	if (full_fname == NULL) {
+		goto out;
+	}
+
+	ret = glfs_symlink(handle->data, msdfs_link, full_fname->base_name);
+
+	TALLOC_FREE(full_fname);
+#endif
+	if (ret == 0) {
+		status = NT_STATUS_OK;
+	} else {
+		status = map_nt_error_from_unix(errno);
+	}
+
+  out:
+
+	TALLOC_FREE(frame);
+	return status;
+}
+
+/*
+ * Read and return the contents of a DFS redirect given a
+ * pathname. A caller can pass in NULL for ppreflist and
+ * preferral_count but still determine if this was a
+ * DFS redirect point by getting NT_STATUS_OK back
+ * without incurring the overhead of reading and parsing
+ * the referral contents.
+ */
+
+static NTSTATUS vfs_gluster_read_dfs_pathat(struct vfs_handle_struct *handle,
+				TALLOC_CTX *mem_ctx,
+				struct files_struct *dirfsp,
+				struct smb_filename *smb_fname,
+				struct referral **ppreflist,
+				size_t *preferral_count)
+{
+	NTSTATUS status = NT_STATUS_NO_MEMORY;
+	size_t bufsize;
+	char *link_target = NULL;
+	int referral_len;
+	bool ok;
+#if defined(HAVE_BROKEN_READLINK)
+	char link_target_buf[PATH_MAX];
+#else
+	char link_target_buf[7];
+#endif
+	struct stat st;
+	struct smb_filename *full_fname = NULL;
+	int ret;
+#ifdef HAVE_GFAPI_VER_7_11
+	glfs_fd_t *pglfd = NULL;
+#endif
+
+	if (is_named_stream(smb_fname)) {
+		status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
+		goto err;
+	}
+
+	if (ppreflist == NULL && preferral_count == NULL) {
+		/*
+		 * We're only checking if this is a DFS
+		 * redirect. We don't need to return data.
+		 */
+		bufsize = sizeof(link_target_buf);
+		link_target = link_target_buf;
+	} else {
+		bufsize = PATH_MAX;
+		link_target = talloc_array(mem_ctx, char, bufsize);
+		if (!link_target) {
+			goto err;
+		}
+	}
+
+	full_fname = full_path_from_dirfsp_atname(talloc_tos(),
+						  dirfsp,
+						  smb_fname);
+	if (full_fname == NULL) {
+		status = NT_STATUS_NO_MEMORY;
+		goto err;
+        }
+
+	ret = glfs_lstat(handle->data, full_fname->base_name, &st);
+	if (ret < 0) {
+		status = map_nt_error_from_unix(errno);
+		goto err;
+	}
+
+#ifdef HAVE_GFAPI_VER_7_11
+	pglfd = vfs_gluster_fetch_glfd(handle, dirfsp);
+	if (pglfd == NULL) {
+		DBG_ERR("Failed to fetch gluster fd\n");
+		return NT_STATUS_OBJECT_NAME_NOT_FOUND;
+	}
+
+	referral_len = glfs_readlinkat(pglfd,
+				       smb_fname->base_name,
+				       link_target,
+				       bufsize - 1);
+#else
+	referral_len = glfs_readlink(handle->data,
+				full_fname->base_name,
+				link_target,
+				bufsize - 1);
+#endif
+	if (referral_len < 0) {
+		if (errno == EINVAL) {
+			DBG_INFO("%s is not a link.\n", full_fname->base_name);
+			status = NT_STATUS_OBJECT_TYPE_MISMATCH;
+		} else {
+			status = map_nt_error_from_unix(errno);
+			DBG_ERR("Error reading "
+				"msdfs link %s: %s\n",
+				full_fname->base_name,
+				strerror(errno));
+		}
+		goto err;
+	}
+	link_target[referral_len] = '\0';
+
+	DBG_INFO("%s -> %s\n",
+			full_fname->base_name,
+			link_target);
+
+	if (!strnequal(link_target, "msdfs:", 6)) {
+		status = NT_STATUS_OBJECT_TYPE_MISMATCH;
+		goto err;
+	}
+
+	if (ppreflist == NULL && preferral_count == NULL) {
+		/* Early return for checking if this is a DFS link. */
+		TALLOC_FREE(full_fname);
+		smb_stat_ex_from_stat(&smb_fname->st, &st);
+		return NT_STATUS_OK;
+	}
+
+	ok = parse_msdfs_symlink(mem_ctx,
+			lp_msdfs_shuffle_referrals(SNUM(handle->conn)),
+			link_target,
+			ppreflist,
+			preferral_count);
+
+	if (ok) {
+		smb_stat_ex_from_stat(&smb_fname->st, &st);
+		status = NT_STATUS_OK;
+	} else {
+		status = NT_STATUS_NO_MEMORY;
+	}
+
+  err:
+
+	if (link_target != link_target_buf) {
+		TALLOC_FREE(link_target);
+	}
+	TALLOC_FREE(full_fname);
+	return status;
+}
+
+static struct vfs_fn_pointers glusterfs_fns = {
+
+	/* Disk Operations */
+
+	.connect_fn = vfs_gluster_connect,
+	.disconnect_fn = vfs_gluster_disconnect,
+	.disk_free_fn = vfs_gluster_disk_free,
+	.get_quota_fn = vfs_gluster_get_quota,
+	.set_quota_fn = vfs_gluster_set_quota,
+	.statvfs_fn = vfs_gluster_statvfs,
+	.fs_capabilities_fn = vfs_gluster_fs_capabilities,
+
+	.get_dfs_referrals_fn = NULL,
+
+	/* Directory Operations */
+
+	.fdopendir_fn = vfs_gluster_fdopendir,
+	.readdir_fn = vfs_gluster_readdir,
+	.rewind_dir_fn = vfs_gluster_rewinddir,
+	.mkdirat_fn = vfs_gluster_mkdirat,
+	.closedir_fn = vfs_gluster_closedir,
+
+	/* File Operations */
+
+	.openat_fn = vfs_gluster_openat,
+	.create_file_fn = NULL,
+	.close_fn = vfs_gluster_close,
+	.pread_fn = vfs_gluster_pread,
+	.pread_send_fn = vfs_gluster_pread_send,
+	.pread_recv_fn = vfs_gluster_pread_recv,
+	.pwrite_fn = vfs_gluster_pwrite,
+	.pwrite_send_fn = vfs_gluster_pwrite_send,
+	.pwrite_recv_fn = vfs_gluster_pwrite_recv,
+	.lseek_fn = vfs_gluster_lseek,
+	.sendfile_fn = vfs_gluster_sendfile,
+	.recvfile_fn = vfs_gluster_recvfile,
+	.renameat_fn = vfs_gluster_renameat,
+	.fsync_send_fn = vfs_gluster_fsync_send,
+	.fsync_recv_fn = vfs_gluster_fsync_recv,
+
+	.stat_fn = vfs_gluster_stat,
+	.fstat_fn = vfs_gluster_fstat,
+	.fstatat_fn = vfs_gluster_fstatat,
+	.lstat_fn = vfs_gluster_lstat,
+	.get_alloc_size_fn = vfs_gluster_get_alloc_size,
+	.unlinkat_fn = vfs_gluster_unlinkat,
+
+	.fchmod_fn = vfs_gluster_fchmod,
+	.fchown_fn = vfs_gluster_fchown,
+	.lchown_fn = vfs_gluster_lchown,
+	.chdir_fn = vfs_gluster_chdir,
+	.getwd_fn = vfs_gluster_getwd,
+	.fntimes_fn = vfs_gluster_fntimes,
+	.ftruncate_fn = vfs_gluster_ftruncate,
+	.fallocate_fn = vfs_gluster_fallocate,
+	.lock_fn = vfs_gluster_lock,
+	.filesystem_sharemode_fn = vfs_gluster_filesystem_sharemode,
+	.fcntl_fn = vfs_gluster_fcntl,
+	.linux_setlease_fn = vfs_gluster_linux_setlease,
+	.getlock_fn = vfs_gluster_getlock,
+	.symlinkat_fn = vfs_gluster_symlinkat,
+	.readlinkat_fn = vfs_gluster_readlinkat,
+	.linkat_fn = vfs_gluster_linkat,
+	.mknodat_fn = vfs_gluster_mknodat,
+	.realpath_fn = vfs_gluster_realpath,
+	.fchflags_fn = vfs_gluster_fchflags,
+	.file_id_create_fn = NULL,
+	.fstreaminfo_fn = NULL,
+	.get_real_filename_at_fn = vfs_gluster_get_real_filename_at,
+	.connectpath_fn = vfs_gluster_connectpath,
+	.create_dfs_pathat_fn = vfs_gluster_create_dfs_pathat,
+	.read_dfs_pathat_fn = vfs_gluster_read_dfs_pathat,
+
+	.brl_lock_windows_fn = NULL,
+	.brl_unlock_windows_fn = NULL,
+	.strict_lock_check_fn = NULL,
+	.translate_name_fn = NULL,
+	.fsctl_fn = NULL,
+
+	/* NT ACL Operations */
+	.fget_nt_acl_fn = NULL,
+	.fset_nt_acl_fn = NULL,
+	.audit_file_fn = NULL,
+
+	/* Posix ACL Operations */
+	.sys_acl_get_fd_fn = posixacl_xattr_acl_get_fd,
+	.sys_acl_blob_get_fd_fn = posix_sys_acl_blob_get_fd,
+	.sys_acl_set_fd_fn = posixacl_xattr_acl_set_fd,
+	.sys_acl_delete_def_fd_fn = posixacl_xattr_acl_delete_def_fd,
+
+	/* EA Operations */
+	.getxattrat_send_fn = vfs_not_implemented_getxattrat_send,
+	.getxattrat_recv_fn = vfs_not_implemented_getxattrat_recv,
+	.fgetxattr_fn = vfs_gluster_fgetxattr,
+	.flistxattr_fn = vfs_gluster_flistxattr,
+	.fremovexattr_fn = vfs_gluster_fremovexattr,
+	.fsetxattr_fn = vfs_gluster_fsetxattr,
+
+	/* AIO Operations */
+	.aio_force_fn = vfs_gluster_aio_force,
+
+	/* Durable handle Operations */
+	.durable_cookie_fn = NULL,
+	.durable_disconnect_fn = NULL,
+	.durable_reconnect_fn = NULL,
+};
+
+static_decl_vfs;
+NTSTATUS vfs_glusterfs_init(TALLOC_CTX *ctx)
+{
+	return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
+				"glusterfs", &glusterfs_fns);
+}