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[Gluster-devel] [PATCH v7] vfs_glusterfs: Samba VFS module for glusterfs


From: Anand Avati
Subject: [Gluster-devel] [PATCH v7] vfs_glusterfs: Samba VFS module for glusterfs
Date: Tue, 28 May 2013 17:36:26 -0400
User-agent: Mutt/1.4.2.2i

Implement a Samba VFS plugin for glusterfs based on gluster's gfapi.
This is a "bottom" vfs plugin (not something to be stacked on top of
another module), and translates (most) calls into closest actions
on gfapi.

Signed-off-by: Anand Avati <address@hidden>
---

Hi,

I hope the waf changes are fine. I could not test them because builds were 
failing generally on samba.git master HEAD.

Avati

 source3/Makefile.in             |    5 +
 source3/configure.in            |   22 +
 source3/modules/vfs_glusterfs.c | 1493 +++++++++++++++++++++++++++++++++++++++
 source3/modules/wscript_build   |    9 +
 source3/wscript                 |   15 +
 5 files changed, 1544 insertions(+), 0 deletions(-)
 create mode 100644 source3/modules/vfs_glusterfs.c

diff --git a/source3/Makefile.in b/source3/Makefile.in
index efe0694..a12887d 100644
--- a/source3/Makefile.in
+++ b/source3/Makefile.in
@@ -915,6 +915,7 @@ VFS_TIME_AUDIT_OBJ = modules/vfs_time_audit.o
 VFS_MEDIA_HARMONY_OBJ = modules/vfs_media_harmony.o
 VFS_BTRFS_OBJ = modules/vfs_btrfs.o
 VFS_CEPH_OBJ = modules/vfs_ceph.o
+VFS_GLUSTERFS_OBJ = modules/vfs_glusterfs.o
 
 PAM_ERRORS_OBJ = ../libcli/auth/pam_errors.o
 PLAINTEXT_AUTH_OBJ = auth/pampass.o auth/pass_check.o $(PAM_ERRORS_OBJ)
@@ -2963,6 +2964,10 @@ bin/address@hidden@: $(BINARY_PREREQS) $(VFS_CEPH_OBJ)
        @echo "Building plugin $@"
        @$(SHLD_MODULE) $(VFS_CEPH_OBJ)
 
+bin/address@hidden@: $(BINARY_PREREQS) $(VFS_GLUSTERFS_OBJ)
+       @echo "Building plugin $@"
+       $(SHLD_MODULE) $(VFS_GLUSTERFS_OBJ)
+
 #########################################################
 ## IdMap NSS plugins
 
diff --git a/source3/configure.in b/source3/configure.in
index 0e2f126..0a5b9e8 100644
--- a/source3/configure.in
+++ b/source3/configure.in
@@ -1051,6 +1051,27 @@ CFLAGS="$save_CFLAGS"
 LDFLAGS="$save_LDFLAGS"
 LIBS="$save_LIBS"
 
+
+###################
+AC_ARG_ENABLE([glusterfs],
+       AC_HELP_STRING([--disable-glusterfs],[Do not build vfs_glusterfs 
module]))
+
+if test "x$enable_glusterfs" != "xno"; then
+   PKG_CHECK_MODULES([GLFS], [glusterfs-api >= 4], glfs_found=yes, 
glfs_found=no)
+fi
+
+if test "x$enable_glusterfs" = "xyes" -a "x$glfs_found" != "xyes"; then
+   echo "GFAPI not found in build system"
+   exit 1
+fi
+
+if test "x$glfs_found" = "xyes"; then
+    CFLAGS="$CFLAGS $GLFS_CFLAGS"
+    LDFLAGS="$LDFLAGS $GLFS_LDFLAGS"
+    LIBS="$LIBS $GLFS_LIBS"
+    default_shared_modules="$default_shared_modules vfs_glusterfs"
+fi
+
 # Note that all the libunwind symbols in the API are defined to internal
 # platform-specific version, so we must include libunwind.h before checking
 # any of them.
@@ -6485,6 +6506,7 @@ SMB_MODULE(vfs_time_audit, \$(VFS_TIME_AUDIT_OBJ), 
"bin/time_audit.$SHLIBEXT", V
 SMB_MODULE(vfs_media_harmony, \$(VFS_MEDIA_HARMONY_OBJ), 
"bin/media_harmony.$SHLIBEXT", VFS)
 SMB_MODULE(vfs_btrfs, \$(VFS_BTRFS_OBJ), "bin/btrfs.$SHLIBEXT", VFS)
 SMB_MODULE(vfs_ceph, \$(VFS_CEPH_OBJ), "bin/ceph.$SHLIBEXT", VFS)
+SMB_MODULE(vfs_glusterfs, \$(VFS_GLUSTERFS_OBJ), "bin/glusterfs.$SHLIBEXT", 
VFS)
 
 SMB_SUBSYSTEM(VFS,smbd/vfs.o)
 
diff --git a/source3/modules/vfs_glusterfs.c b/source3/modules/vfs_glusterfs.c
new file mode 100644
index 0000000..24e1bda
--- /dev/null
+++ b/source3/modules/vfs_glusterfs.c
@@ -0,0 +1,1493 @@
+/*
+   Unix SMB/CIFS implementation.
+
+   Wrap GlusterFS GFAPI calls in vfs functions.
+
+   Copyright (c) 2013 Anand Avati <address@hidden>
+
+   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 <stdio.h>
+#include "api/glfs.h"
+#include "lib/util/dlinklist.h"
+
+#define DEFAULT_VOLFILE_SERVER "localhost"
+
+/*
+  TODO
+  ----
+  Short term:
+  - AIO support
+  - sendfile/recvfile support
+*/
+
+/* Helpers to provide 'integer' fds */
+
+/* This is global. gfapi's FD operations do not
+   require filesystem context.
+*/
+
+static glfs_fd_t **glfd_fd;
+static int glfd_fd_size;
+static int glfd_fd_used;
+
+static int glfd_fd_store(glfs_fd_t *glfd)
+{
+       int i;
+       void *tmp;
+
+       if (glfd_fd_size == glfd_fd_used) {
+               if (glfd_fd_size >= INT_MAX - 1) {
+                       errno = ENOMEM;
+                       return -1;
+               }
+
+               tmp = talloc_realloc(glfd_fd, glfd_fd, glfs_fd_t *,
+                                    glfd_fd_size + 1);
+               if (tmp == NULL) {
+                       errno = ENOMEM;
+                       return -1;
+               }
+
+               glfd_fd = tmp;
+               glfd_fd[glfd_fd_size] = 0;
+               glfd_fd_size++;
+       }
+
+       for (i = 0; i < glfd_fd_size; i++) {
+               if (glfd_fd[i] == NULL) {
+                       break;
+               }
+       }
+       glfd_fd_used++;
+       glfd_fd[i] = glfd;
+       return i;
+}
+
+static glfs_fd_t *glfd_fd_get(int i)
+{
+       if (i < 0 || i >= glfd_fd_size) {
+               return NULL;
+       }
+       return glfd_fd[i];
+}
+
+static glfs_fd_t *glfd_fd_clear(int i)
+{
+       glfs_fd_t *glfd = NULL;
+
+       if (i < 0 || i >= glfd_fd_size) {
+               return NULL;
+       }
+
+       glfd = glfd_fd[i];
+
+       glfd_fd[i] = 0;
+       glfd_fd_used--;
+       return glfd;
+}
+
+/* Helper to convert stat to 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;
+#ifdef STAT_HAVE_NSEC
+       dst->st_ex_atime.tv_nsec = src->st_atime_nsec;
+#endif
+       dst->st_ex_mtime.tv_sec = src->st_mtime;
+#ifdef STAT_HAVE_NSEC
+       dst->st_ex_mtime.tv_nsec = src->st_mtime_nsec;
+#endif
+       dst->st_ex_ctime.tv_sec = src->st_ctime;
+#ifdef STAT_HAVE_NSEC
+       dst->st_ex_ctime.tv_nsec = src->st_ctime_nsec;
+#endif
+       dst->st_ex_btime.tv_sec = src->st_mtime;
+#ifdef STAT_HAVE_NSEC
+       dst->st_ex_btime.tv_nsec = src->st_mtime_nsec;
+#endif
+       dst->st_ex_blksize = src->st_blksize;
+       dst->st_ex_blocks = src->st_blocks;
+}
+
+/* pre-opened glfs_t */
+
+static struct glfs_preopened {
+       char *volume;
+       glfs_t *fs;
+       int ref;
+       struct glfs_preopened *next, *prev;
+} *glfs_preopened;
+
+
+int glfs_set_preopened(const char *volume, 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->fs = fs;
+       entry->ref = 1;
+
+       DLIST_ADD(glfs_preopened, entry);
+
+       return 0;
+}
+
+static glfs_t *glfs_find_preopened(const char *volume)
+{
+       struct glfs_preopened *entry = NULL;
+
+       for (entry = glfs_preopened; entry; entry = entry->next) {
+               if (strcmp(entry->volume, volume) == 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);
+               }
+       }
+}
+
+/* Disk Operations */
+
+static int vfs_gluster_connect(struct vfs_handle_struct *handle,
+                              const char *service,
+                              const char *user)
+{
+       const char *volfile_server;
+       const char *volume;
+       const char *logfile;
+       int loglevel;
+       glfs_t *fs;
+       int ret;
+
+       logfile = lp_parm_const_string(SNUM(handle->conn), "glusterfs",
+                                      "logfile", NULL);
+
+       loglevel = lp_parm_int(SNUM(handle->conn), "glusterfs", "loglevel", -1);
+
+       volfile_server = lp_parm_const_string(SNUM(handle->conn), "glusterfs",
+                                              "volfile_server", NULL);
+       if (volfile_server == NULL) {
+               volfile_server = DEFAULT_VOLFILE_SERVER;
+       }
+
+       volume = lp_parm_const_string(SNUM(handle->conn), "glusterfs", "volume",
+                                     NULL);
+       if (volume == NULL) {
+               volume = service;
+       }
+
+       fs = glfs_find_preopened(volume);
+       if (fs) {
+               goto found;
+       }
+
+       fs = glfs_new(volume);
+       if (fs == NULL) {
+               return -1;
+       }
+
+       ret = glfs_set_volfile_server(fs, "tcp", volfile_server, 0);
+       if (ret < 0) {
+               DEBUG(0, ("Failed to set volfile_server %s\n", volfile_server));
+               glfs_fini(fs);
+               return -1;
+       }
+
+       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));
+               glfs_fini(fs);
+               return -1;
+       }
+
+       ret = glfs_set_logging(fs, logfile, loglevel);
+       if (ret < 0) {
+               DEBUG(0, ("%s: Failed to set logfile %s loglevel %d\n",
+                         volume, logfile, loglevel));
+               glfs_fini(fs);
+               return -1;
+       }
+
+       ret = glfs_init(fs);
+       if (ret < 0) {
+               DEBUG(0, ("%s: Failed to initialize volume (%s)\n",
+                         volume, strerror(errno)));
+               glfs_fini(fs);
+               return -1;
+       }
+
+       ret = glfs_set_preopened(volume, fs);
+       if (ret < 0) {
+               DEBUG(0, ("%s: Failed to register volume (%s)\n",
+                         volume, strerror(errno)));
+               glfs_fini(fs);
+               return -1;
+       }
+found:
+       DEBUG(0, ("%s: Initialized volume from server %s\n",
+                 volume, volfile_server));
+       handle->data = fs;
+       return 0;
+}
+
+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 char *path, bool small_query,
+                                     uint64_t *bsize_p, uint64_t *dfree_p,
+                                     uint64_t *dsize_p)
+{
+       struct statvfs statvfs = { 0, };
+       uint64_t dfree = 0;
+       int ret;
+
+       ret = glfs_statvfs(handle->data, path, &statvfs);
+       if (ret < 0) {
+               return -1;
+       }
+
+       dfree = statvfs.f_bsize * statvfs.f_bavail;
+
+       if (bsize_p != NULL) {
+               *bsize_p = statvfs.f_bsize;
+       }
+       if (dfree_p != NULL) {
+               *dfree_p = dfree;
+       }
+       if (dsize_p != NULL) {
+               *dsize_p = statvfs.f_bsize * statvfs.f_blocks;
+       }
+
+       return dfree;
+}
+
+static int vfs_gluster_get_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_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 char *path,
+                              struct vfs_statvfs_struct *vfs_statvfs)
+{
+       struct statvfs statvfs = { 0, };
+       int ret;
+
+       ret = glfs_statvfs(handle->data, path, &statvfs);
+       if (ret < 0) {
+               DEBUG(0, ("glfs_statvfs(%s) failed: %s\n",
+                         path, 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 STAT_HAVE_NSEC
+       *p_ts_res = TIMESTAMP_SET_NT_OR_BETTER;
+#endif
+
+       return caps;
+}
+
+static DIR *vfs_gluster_opendir(struct vfs_handle_struct *handle,
+                               const char *path, const char *mask,
+                               uint32 attributes)
+{
+       glfs_fd_t *fd;
+
+       fd = glfs_opendir(handle->data, path);
+       if (fd == NULL) {
+               DEBUG(0, ("glfs_opendir(%s) failed: %s\n",
+                         path, strerror(errno)));
+       }
+
+       return (DIR *) fd;
+}
+
+static DIR *vfs_gluster_fdopendir(struct vfs_handle_struct *handle,
+                                 files_struct *fsp, const char *mask,
+                                 uint32 attributes)
+{
+       return (DIR *) glfd_fd_get(fsp->fh->fd);
+}
+
+static int vfs_gluster_closedir(struct vfs_handle_struct *handle, DIR *dirp)
+{
+       return glfs_closedir((void *)dirp);
+}
+
+static struct dirent *vfs_gluster_readdir(struct vfs_handle_struct *handle,
+                                         DIR *dirp, SMB_STRUCT_STAT *sbuf)
+{
+       static char direntbuf[512];
+       int ret;
+       struct stat stat;
+       struct dirent *dirent = 0;
+
+       if (sbuf != NULL) {
+               ret = glfs_readdirplus_r((void *)dirp, &stat, (void *)direntbuf,
+                                        &dirent);
+       } else {
+               ret = glfs_readdir_r((void *)dirp, (void *)direntbuf, &dirent);
+       }
+
+       if ((ret < 0) || (dirent == NULL)) {
+               return NULL;
+       }
+
+       if (sbuf != NULL) {
+               smb_stat_ex_from_stat(sbuf, &stat);
+       }
+
+       return dirent;
+}
+
+static long vfs_gluster_telldir(struct vfs_handle_struct *handle, DIR *dirp)
+{
+       return glfs_telldir((void *)dirp);
+}
+
+static void vfs_gluster_seekdir(struct vfs_handle_struct *handle, DIR *dirp,
+                               long offset)
+{
+       glfs_seekdir((void *)dirp, offset);
+}
+
+static void vfs_gluster_rewinddir(struct vfs_handle_struct *handle, DIR *dirp)
+{
+       glfs_seekdir((void *)dirp, 0);
+}
+
+static void vfs_gluster_init_search_op(struct vfs_handle_struct *handle,
+                                      DIR *dirp)
+{
+       return;
+}
+
+static int vfs_gluster_mkdir(struct vfs_handle_struct *handle, const char 
*path,
+                            mode_t mode)
+{
+       return glfs_mkdir(handle->data, path, mode);
+}
+
+static int vfs_gluster_rmdir(struct vfs_handle_struct *handle, const char 
*path)
+{
+       return glfs_rmdir(handle->data, path);
+}
+
+static int vfs_gluster_open(struct vfs_handle_struct *handle,
+                           struct smb_filename *smb_fname, files_struct *fsp,
+                           int flags, mode_t mode)
+{
+       glfs_fd_t *glfd;
+
+       if (flags & O_DIRECTORY) {
+               glfd = glfs_opendir(handle->data, smb_fname->base_name);
+       } else if (flags & O_CREAT) {
+               glfd = glfs_creat(handle->data, smb_fname->base_name, flags,
+                                 mode);
+       } else {
+               glfd = glfs_open(handle->data, smb_fname->base_name, flags);
+       }
+
+       if (glfd == NULL) {
+               DEBUG(0, ("glfs_{open[dir],creat}(%s) failed: %s\n",
+                         smb_fname->base_name, strerror(errno)));
+               return -1;
+       }
+
+       return glfd_fd_store(glfd);
+}
+
+static int vfs_gluster_close(struct vfs_handle_struct *handle,
+                            files_struct *fsp)
+{
+       return glfs_close(glfd_fd_clear(fsp->fh->fd));
+}
+
+static ssize_t vfs_gluster_read(struct vfs_handle_struct *handle,
+                               files_struct *fsp, void *data, size_t n)
+{
+       return glfs_read(glfd_fd_get(fsp->fh->fd), data, n, 0);
+}
+
+static ssize_t vfs_gluster_pread(struct vfs_handle_struct *handle,
+                                files_struct *fsp, void *data, size_t n,
+                                off_t offset)
+{
+       return glfs_pread(glfd_fd_get(fsp->fh->fd), data, n, offset, 0);
+}
+
+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)
+{
+       errno = ENOTSUP;
+       return NULL;
+}
+
+static ssize_t vfs_gluster_pread_recv(struct tevent_req *req, int *err)
+{
+       errno = ENOTSUP;
+       return -1;
+}
+
+static ssize_t vfs_gluster_write(struct vfs_handle_struct *handle,
+                                files_struct *fsp, const void *data, size_t n)
+{
+       return glfs_write(glfd_fd_get(fsp->fh->fd), data, n, 0);
+}
+
+static ssize_t vfs_gluster_pwrite(struct vfs_handle_struct *handle,
+                                 files_struct *fsp, const void *data,
+                                 size_t n, off_t offset)
+{
+       return glfs_pwrite(glfd_fd_get(fsp->fh->fd), data, n, offset, 0);
+}
+
+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)
+{
+       errno = ENOTSUP;
+       return NULL;
+}
+
+static ssize_t vfs_gluster_pwrite_recv(struct tevent_req *req, int *err)
+{
+       errno = ENOTSUP;
+       return -1;
+}
+
+static off_t vfs_gluster_lseek(struct vfs_handle_struct *handle,
+                              files_struct *fsp, off_t offset, int whence)
+{
+       return glfs_lseek(glfd_fd_get(fsp->fh->fd), offset, whence);
+}
+
+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_rename(struct vfs_handle_struct *handle,
+                             const struct smb_filename *smb_fname_src,
+                             const struct smb_filename *smb_fname_dst)
+{
+       return glfs_rename(handle->data, smb_fname_src->base_name,
+                          smb_fname_dst->base_name);
+}
+
+static int vfs_gluster_fsync(struct vfs_handle_struct *handle,
+                            files_struct *fsp)
+{
+       return glfs_fsync(glfd_fd_get(fsp->fh->fd));
+}
+
+static struct tevent_req *vfs_gluster_fsync_send(struct vfs_handle_struct
+                                                *handle, TALLOC_CTX *mem_ctx,
+                                                struct tevent_context *ev,
+                                                files_struct *fsp)
+{
+       errno = ENOTSUP;
+       return NULL;
+}
+
+static int vfs_gluster_fsync_recv(struct tevent_req *req, int *err)
+{
+       errno = ENOTSUP;
+       return -1;
+}
+
+static int vfs_gluster_stat(struct vfs_handle_struct *handle,
+                           struct smb_filename *smb_fname)
+{
+       struct stat st;
+       int ret;
+
+       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)));
+       }
+       return ret;
+}
+
+static int vfs_gluster_fstat(struct vfs_handle_struct *handle,
+                            files_struct *fsp, SMB_STRUCT_STAT *sbuf)
+{
+       struct stat st;
+       int ret;
+
+       ret = glfs_fstat(glfd_fd_get(fsp->fh->fd), &st);
+       if (ret == 0) {
+               smb_stat_ex_from_stat(sbuf, &st);
+       }
+       if (ret < 0) {
+               DEBUG(0, ("glfs_fstat(%d) failed: %s\n",
+                         fsp->fh->fd, strerror(errno)));
+       }
+       return ret;
+}
+
+static int vfs_gluster_lstat(struct vfs_handle_struct *handle,
+                            struct smb_filename *smb_fname)
+{
+       struct stat st;
+       int ret;
+
+       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)));
+       }
+       return ret;
+}
+
+static uint64_t vfs_gluster_get_alloc_size(struct vfs_handle_struct *handle,
+                                          files_struct *fsp,
+                                          const SMB_STRUCT_STAT *sbuf)
+{
+       return sbuf->st_ex_blocks * 512;
+}
+
+static int vfs_gluster_unlink(struct vfs_handle_struct *handle,
+                             const struct smb_filename *smb_fname)
+{
+       return glfs_unlink(handle->data, smb_fname->base_name);
+}
+
+static int vfs_gluster_chmod(struct vfs_handle_struct *handle,
+                            const char *path, mode_t mode)
+{
+       return glfs_chmod(handle->data, path, mode);
+}
+
+static int vfs_gluster_fchmod(struct vfs_handle_struct *handle,
+                             files_struct *fsp, mode_t mode)
+{
+       return glfs_fchmod(glfd_fd_get(fsp->fh->fd), mode);
+}
+
+static int vfs_gluster_chown(struct vfs_handle_struct *handle,
+                            const char *path, uid_t uid, gid_t gid)
+{
+       return glfs_chown(handle->data, path, uid, gid);
+}
+
+static int vfs_gluster_fchown(struct vfs_handle_struct *handle,
+                             files_struct *fsp, uid_t uid, gid_t gid)
+{
+       return glfs_fchown(glfd_fd_get(fsp->fh->fd), uid, gid);
+}
+
+static int vfs_gluster_lchown(struct vfs_handle_struct *handle,
+                             const char *path, uid_t uid, gid_t gid)
+{
+       return glfs_lchown(handle->data, path, uid, gid);
+}
+
+static int vfs_gluster_chdir(struct vfs_handle_struct *handle, const char 
*path)
+{
+       return glfs_chdir(handle->data, path);
+}
+
+static char *vfs_gluster_getwd(struct vfs_handle_struct *handle)
+{
+       char *cwd;
+       char *ret;
+
+       cwd = calloc(1, PATH_MAX + 1);
+       if (cwd == NULL) {
+               return NULL;
+       }
+
+       ret = glfs_getcwd(handle->data, cwd, PATH_MAX);
+       if (ret == 0) {
+               free(cwd);
+       }
+       return ret;
+}
+
+static int vfs_gluster_ntimes(struct vfs_handle_struct *handle,
+                             const struct smb_filename *smb_fname,
+                             struct smb_file_time *ft)
+{
+       struct timespec times[2];
+
+       times[0].tv_sec = ft->atime.tv_sec;
+       times[0].tv_nsec = ft->atime.tv_nsec;
+       times[1].tv_sec = ft->mtime.tv_sec;
+       times[1].tv_nsec = ft->mtime.tv_nsec;
+
+       return glfs_utimens(handle->data, smb_fname->base_name, times);
+}
+
+static int vfs_gluster_ftruncate(struct vfs_handle_struct *handle,
+                                files_struct *fsp, off_t offset)
+{
+       return glfs_ftruncate(glfd_fd_get(fsp->fh->fd), offset);
+}
+
+static int vfs_gluster_fallocate(struct vfs_handle_struct *handle,
+                                struct files_struct *fsp,
+                                enum vfs_fallocate_mode mode,
+                                off_t offset, off_t len)
+{
+       errno = ENOTSUP;
+       return -1;
+}
+
+static char *vfs_gluster_realpath(struct vfs_handle_struct *handle,
+                                 const char *path)
+{
+       return glfs_realpath(handle->data, path, 0);
+}
+
+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;
+
+       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_fd_get(fsp->fh->fd), 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()))
+                       return true;
+               /* not me */
+               return false;
+       }
+
+       if (ret == -1) {
+               return false;
+       }
+
+       return true;
+}
+
+static int vfs_gluster_kernel_flock(struct vfs_handle_struct *handle,
+                                   files_struct *fsp, uint32 share_mode,
+                                   uint32_t access_mask)
+{
+       errno = ENOSYS;
+       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;
+
+       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_fd_get(fsp->fh->fd), F_GETLK, &flock);
+
+       if (ret == -1) {
+               return false;
+       }
+
+       *ptype = flock.l_type;
+       *poffset = flock.l_start;
+       *pcount = flock.l_len;
+       *ppid = flock.l_pid;
+
+       return true;
+}
+
+static int vfs_gluster_symlink(struct vfs_handle_struct *handle,
+                              const char *oldpath, const char *newpath)
+{
+       return glfs_symlink(handle->data, oldpath, newpath);
+}
+
+static int vfs_gluster_readlink(struct vfs_handle_struct *handle,
+                               const char *path, char *buf, size_t bufsiz)
+{
+       return glfs_readlink(handle->data, path, buf, bufsiz);
+}
+
+static int vfs_gluster_link(struct vfs_handle_struct *handle,
+                           const char *oldpath, const char *newpath)
+{
+       return glfs_link(handle->data, oldpath, newpath);
+}
+
+static int vfs_gluster_mknod(struct vfs_handle_struct *handle, const char 
*path,
+                            mode_t mode, SMB_DEV_T dev)
+{
+       return glfs_mknod(handle->data, path, mode, dev);
+}
+
+static NTSTATUS vfs_gluster_notify_watch(struct vfs_handle_struct *handle,
+                                        struct sys_notify_context *ctx,
+                                        const char *path, uint32_t *filter,
+                                        uint32_t *subdir_filter,
+                                        void (*callback) (struct 
sys_notify_context *ctx,
+                                                          void *private_data,
+                                                          struct notify_event 
*ev),
+                                        void *private_data, void *handle_p)
+{
+       return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static int vfs_gluster_chflags(struct vfs_handle_struct *handle,
+                              const char *path, unsigned int flags)
+{
+       errno = ENOSYS;
+       return -1;
+}
+
+static int vfs_gluster_get_real_filename(struct vfs_handle_struct *handle,
+                                        const char *path, const char *name,
+                                        TALLOC_CTX *mem_ctx, char **found_name)
+{
+       int ret;
+       char key_buf[NAME_MAX + 64];
+       char val_buf[NAME_MAX + 1];
+
+       if (strlen(name) >= NAME_MAX) {
+               errno = ENAMETOOLONG;
+               return -1;
+       }
+
+       snprintf(key_buf, NAME_MAX + 64,
+                "user.glusterfs.get_real_filename:%s", name);
+
+       ret = glfs_getxattr(handle->data, path, key_buf, val_buf, NAME_MAX + 1);
+       if (ret == -1 && errno == ENODATA) {
+               errno = EOPNOTSUPP;
+               return -1;
+       }
+
+       *found_name = talloc_strdup(mem_ctx, val_buf);
+       if (found_name[0] == NULL) {
+               errno = ENOMEM;
+               return -1;
+       }
+       return 0;
+}
+
+static const char *vfs_gluster_connectpath(struct vfs_handle_struct *handle,
+                                          const char *filename)
+{
+       return handle->conn->connectpath;
+}
+
+/* EA Operations */
+
+static ssize_t vfs_gluster_getxattr(struct vfs_handle_struct *handle,
+                                   const char *path, const char *name,
+                                   void *value, size_t size)
+{
+       return glfs_getxattr(handle->data, path, name, value, size);
+}
+
+static ssize_t vfs_gluster_fgetxattr(struct vfs_handle_struct *handle,
+                                    files_struct *fsp, const char *name,
+                                    void *value, size_t size)
+{
+       return glfs_fgetxattr(glfd_fd_get(fsp->fh->fd), name, value, size);
+}
+
+static ssize_t vfs_gluster_listxattr(struct vfs_handle_struct *handle,
+                                    const char *path, char *list, size_t size)
+{
+       return glfs_listxattr(handle->data, path, list, size);
+}
+
+static ssize_t vfs_gluster_flistxattr(struct vfs_handle_struct *handle,
+                                     files_struct *fsp, char *list,
+                                     size_t size)
+{
+       return glfs_flistxattr(glfd_fd_get(fsp->fh->fd), list, size);
+}
+
+static int vfs_gluster_removexattr(struct vfs_handle_struct *handle,
+                                  const char *path, const char *name)
+{
+       return glfs_removexattr(handle->data, path, name);
+}
+
+static int vfs_gluster_fremovexattr(struct vfs_handle_struct *handle,
+                                   files_struct *fsp, const char *name)
+{
+       return glfs_fremovexattr(glfd_fd_get(fsp->fh->fd), name);
+}
+
+static int vfs_gluster_setxattr(struct vfs_handle_struct *handle,
+                               const char *path, const char *name,
+                               const void *value, size_t size, int flags)
+{
+       return glfs_setxattr(handle->data, path, name, value, size, flags);
+}
+
+static int vfs_gluster_fsetxattr(struct vfs_handle_struct *handle,
+                                files_struct *fsp, const char *name,
+                                const void *value, size_t size, int flags)
+{
+       return glfs_fsetxattr(glfd_fd_get(fsp->fh->fd), name, value, size,
+                             flags);
+}
+
+/* AIO Operations */
+
+static bool vfs_gluster_aio_force(struct vfs_handle_struct *handle,
+                                 files_struct *fsp)
+{
+       return false;
+}
+
+/* Offline Operations */
+
+static bool vfs_gluster_is_offline(struct vfs_handle_struct *handle,
+                                  const struct smb_filename *fname,
+                                  SMB_STRUCT_STAT *sbuf)
+{
+       return false;
+}
+
+static int vfs_gluster_set_offline(struct vfs_handle_struct *handle,
+                                  const struct smb_filename *fname)
+{
+       errno = ENOTSUP;
+       return -1;
+}
+
+/* Posix ACL Operations */
+
+#define GLUSTER_ACL_VERSION 2
+#define GLUSTER_ACL_READ    0x04
+#define GLUSTER_ACL_WRITE   0x02
+#define GLUSTER_ACL_EXECUTE 0x01
+
+#define GLUSTER_ACL_UNDEFINED_TAG  0x00
+#define GLUSTER_ACL_USER_OBJ       0x01
+#define GLUSTER_ACL_USER           0x02
+#define GLUSTER_ACL_GROUP_OBJ      0x04
+#define GLUSTER_ACL_GROUP          0x08
+#define GLUSTER_ACL_MASK           0x10
+#define GLUSTER_ACL_OTHER          0x20
+
+#define GLUSTER_ACL_UNDEFINED_ID  (-1)
+
+struct gluster_ace {
+       uint16_t tag;
+       uint16_t perm;
+       uint32_t id;
+};
+
+struct gluster_acl_header {
+       uint32_t version;
+       struct gluster_ace entries[];
+};
+
+static SMB_ACL_T gluster_to_smb_acl(const char *buf, size_t xattr_size,
+                                   TALLOC_CTX *mem_ctx)
+{
+       int count;
+       size_t size;
+       struct gluster_ace *ace;
+       struct smb_acl_entry *smb_ace;
+       struct gluster_acl_header *hdr;
+       struct smb_acl_t *result;
+       int i;
+       uint16_t tag;
+       uint16_t perm;
+       uint32_t id;
+
+       size = xattr_size;
+
+       if (size < sizeof(*hdr)) {
+               /* ACL should be at least as big as the header */
+               errno = EINVAL;
+               return NULL;
+       }
+
+       size -= sizeof(*hdr);
+
+       if (size % sizeof(*ace)) {
+               /* Size of entries must strictly be a multiple of
+                  size of an ACE
+               */
+               errno = EINVAL;
+               return NULL;
+       }
+
+       count = size / sizeof(*ace);
+
+       hdr = (void *)buf;
+
+       if (ntohl(hdr->version) != GLUSTER_ACL_VERSION) {
+               DEBUG(0, ("Unknown gluster ACL version: %d\n",
+                         ntohl(hdr->version)));
+               return NULL;
+       }
+
+       result = sys_acl_init(mem_ctx);
+       if (!result) {
+               errno = ENOMEM;
+               return NULL;
+       }
+
+       result->acl = talloc_array(result, struct smb_acl_entry, count);
+       if (!result->acl) {
+               errno = ENOMEM;
+               talloc_free(result);
+               return NULL;
+       }
+
+       result->count = count;
+
+       smb_ace = result->acl;
+       ace = hdr->entries;
+
+       for (i = 0; i < count; i++) {
+               tag = ntohs(ace->tag);
+
+               switch(tag) {
+               case GLUSTER_ACL_USER:
+                       smb_ace->a_type = SMB_ACL_USER;
+                       break;
+               case GLUSTER_ACL_USER_OBJ:
+                       smb_ace->a_type = SMB_ACL_USER_OBJ;
+                       break;
+               case GLUSTER_ACL_GROUP:
+                       smb_ace->a_type = SMB_ACL_GROUP;
+                       break;
+               case GLUSTER_ACL_GROUP_OBJ:
+                       smb_ace->a_type = SMB_ACL_GROUP_OBJ;
+                       break;
+               case GLUSTER_ACL_OTHER:
+                       smb_ace->a_type = SMB_ACL_OTHER;
+                       break;
+               case GLUSTER_ACL_MASK:
+                       smb_ace->a_type = SMB_ACL_MASK;
+                       break;
+               default:
+                       DEBUG(0, ("unknown tag type %d\n", (unsigned int) tag));
+                       return NULL;
+               }
+
+               id = ntohl(ace->id);
+
+               switch(smb_ace->a_type) {
+               case SMB_ACL_USER:
+                       smb_ace->info.user.uid = id;
+                       break;
+               case SMB_ACL_GROUP:
+                       smb_ace->info.group.gid = id;
+                       break;
+               default:
+                       break;
+               }
+
+               perm = ntohs(ace->perm);
+
+               smb_ace->a_perm = 0;
+               smb_ace->a_perm |=
+                       ((perm & GLUSTER_ACL_READ) ? SMB_ACL_READ : 0);
+               smb_ace->a_perm |=
+                       ((perm & GLUSTER_ACL_WRITE) ? SMB_ACL_WRITE : 0);
+               smb_ace->a_perm |=
+                       ((perm & GLUSTER_ACL_EXECUTE) ? SMB_ACL_EXECUTE : 0);
+
+               ace++;
+               smb_ace++;
+       }
+
+       return result;
+}
+
+
+static ssize_t smb_to_gluster_acl(SMB_ACL_T theacl, char *buf, size_t len)
+{
+       ssize_t size;
+       struct gluster_ace *ace;
+       struct smb_acl_entry *smb_ace;
+       struct gluster_acl_header *hdr;
+       int i;
+       int count;
+       uint16_t tag;
+       uint16_t perm;
+       uint32_t id;
+
+       count = theacl->count;
+
+       size = sizeof(*hdr) + (count * sizeof(*ace));
+       if (!buf) {
+               return size;
+       }
+
+       if (len < size) {
+               errno = ERANGE;
+               return -1;
+       }
+
+       hdr = (void *)buf;
+       ace = hdr->entries;
+       smb_ace = theacl->acl;
+
+       hdr->version = htonl(GLUSTER_ACL_VERSION);
+
+       for (i = 0; i < count; i++) {
+               switch(smb_ace->a_type) {
+               case SMB_ACL_USER:
+                       tag = GLUSTER_ACL_USER;
+                       break;
+               case SMB_ACL_USER_OBJ:
+                       tag = GLUSTER_ACL_USER_OBJ;
+                       break;
+               case SMB_ACL_GROUP:
+                       tag = GLUSTER_ACL_GROUP;
+                       break;
+               case SMB_ACL_GROUP_OBJ:
+                       tag = GLUSTER_ACL_GROUP_OBJ;
+                       break;
+               case SMB_ACL_OTHER:
+                       tag = GLUSTER_ACL_OTHER;
+                       break;
+               case SMB_ACL_MASK:
+                       tag = GLUSTER_ACL_MASK;
+                       break;
+               default:
+                       DEBUG(0, ("Unknown tag value %d\n",
+                                 smb_ace->a_type));
+                       errno = EINVAL;
+                       return -1;
+               }
+
+               ace->tag = ntohs(tag);
+
+               switch(smb_ace->a_type) {
+               case SMB_ACL_USER:
+                       id = smb_ace->info.user.uid;
+                       break;
+               case SMB_ACL_GROUP:
+                       id = smb_ace->info.group.gid;
+                       break;
+               default:
+                       id = GLUSTER_ACL_UNDEFINED_ID;
+                       break;
+               }
+
+               ace->id = ntohl(id);
+
+               ace->perm = 0;
+               ace->perm |=
+                       ((smb_ace->a_perm & SMB_ACL_READ) ? GLUSTER_ACL_READ : 
0);
+               ace->perm |=
+                       ((smb_ace->a_perm & SMB_ACL_WRITE) ? GLUSTER_ACL_WRITE 
: 0);
+               ace->perm |=
+                       ((smb_ace->a_perm & SMB_ACL_EXECUTE) ? 
GLUSTER_ACL_EXECUTE : 0);
+
+               ace++;
+               smb_ace++;
+       }
+
+       return size;
+}
+
+
+static SMB_ACL_T vfs_gluster_sys_acl_get_file(struct vfs_handle_struct *handle,
+                                             const char *path_p,
+                                             SMB_ACL_TYPE_T type,
+                                             TALLOC_CTX *mem_ctx)
+{
+       struct smb_acl_t *result;
+       char *buf;
+       char *key;
+       ssize_t ret;
+
+       switch (type) {
+       case SMB_ACL_TYPE_ACCESS:
+               key = "system.posix_acl_access";
+               break;
+       case SMB_ACL_TYPE_DEFAULT:
+               key = "system.posix_acl_default";
+               break;
+       default:
+               errno = EINVAL;
+               return NULL;
+       }
+
+       ret = glfs_getxattr(handle->data, path_p, key, 0, 0);
+       if (ret <= 0) {
+               return NULL;
+       }
+
+       buf = alloca(ret);
+       ret = glfs_getxattr(handle->data, path_p, key, buf, ret);
+       if (ret <= 0) {
+               return NULL;
+       }
+
+       result = gluster_to_smb_acl(buf, ret, mem_ctx);
+
+       return result;
+}
+
+static SMB_ACL_T vfs_gluster_sys_acl_get_fd(struct vfs_handle_struct *handle,
+                                           struct files_struct *fsp,
+                                           TALLOC_CTX *mem_ctx)
+{
+       struct smb_acl_t *result;
+       int ret;
+       char *buf;
+
+       ret = glfs_fgetxattr(glfd_fd_get(fsp->fh->fd),
+                            "system.posix_acl_access", 0, 0);
+       if (ret <= 0) {
+               return NULL;
+       }
+
+       buf = alloca(ret);
+       ret = glfs_fgetxattr(glfd_fd_get(fsp->fh->fd),
+                            "system.posix_acl_access", buf, ret);
+       if (ret <= 0) {
+               return NULL;
+       }
+
+       result = gluster_to_smb_acl(buf, ret, mem_ctx);
+
+       return result;
+}
+
+static int vfs_gluster_sys_acl_set_file(struct vfs_handle_struct *handle,
+                                       const char *name,
+                                       SMB_ACL_TYPE_T acltype,
+                                       SMB_ACL_T theacl)
+{
+       int ret;
+       char *key;
+       char *buf;
+       ssize_t size;
+
+       switch (acltype) {
+       case SMB_ACL_TYPE_ACCESS:
+               key = "system.posix_acl_access";
+               break;
+       case SMB_ACL_TYPE_DEFAULT:
+               key = "system.posix_acl_default";
+               break;
+       default:
+               errno = EINVAL;
+               return -1;
+       }
+
+       size = smb_to_gluster_acl(theacl, 0, 0);
+       buf = alloca(size);
+
+       size = smb_to_gluster_acl(theacl, buf, size);
+       if (size == -1) {
+               return -1;
+       }
+
+       ret = glfs_setxattr(handle->data, name, key, buf, size, 0);
+
+       return ret;
+}
+
+static int vfs_gluster_sys_acl_set_fd(struct vfs_handle_struct *handle,
+                                     struct files_struct *fsp,
+                                     SMB_ACL_T theacl)
+{
+       int ret;
+       char *key;
+       char *buf;
+       ssize_t size;
+
+       size = smb_to_gluster_acl(theacl, 0, 0);
+       buf = alloca(size);
+
+       size = smb_to_gluster_acl(theacl, buf, size);
+       if (size == -1) {
+               return -1;
+       }
+
+       ret = glfs_fsetxattr(glfd_fd_get(fsp->fh->fd),
+                            "system.posix_acl_access", buf, size, 0);
+       return ret;
+}
+
+static int vfs_gluster_sys_acl_delete_def_file(struct vfs_handle_struct 
*handle,
+                                              const char *path)
+{
+       return glfs_removexattr(handle->data, path, "system.posix_acl_default");
+}
+
+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 */
+
+       .opendir_fn = vfs_gluster_opendir,
+       .fdopendir_fn = vfs_gluster_fdopendir,
+       .readdir_fn = vfs_gluster_readdir,
+       .seekdir_fn = vfs_gluster_seekdir,
+       .telldir_fn = vfs_gluster_telldir,
+       .rewind_dir_fn = vfs_gluster_rewinddir,
+       .mkdir_fn = vfs_gluster_mkdir,
+       .rmdir_fn = vfs_gluster_rmdir,
+       .closedir_fn = vfs_gluster_closedir,
+       .init_search_op_fn = vfs_gluster_init_search_op,
+
+       /* File Operations */
+
+       .open_fn = vfs_gluster_open,
+       .create_file_fn = NULL,
+       .close_fn = vfs_gluster_close,
+       .read_fn = vfs_gluster_read,
+       .pread_fn = vfs_gluster_pread,
+       .pread_send_fn = vfs_gluster_pread_send,
+       .pread_recv_fn = vfs_gluster_pread_recv,
+       .write_fn = vfs_gluster_write,
+       .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,
+       .rename_fn = vfs_gluster_rename,
+       .fsync_fn = vfs_gluster_fsync,
+       .fsync_send_fn = vfs_gluster_fsync_send,
+       .fsync_recv_fn = vfs_gluster_fsync_recv,
+
+       .stat_fn = vfs_gluster_stat,
+       .fstat_fn = vfs_gluster_fstat,
+       .lstat_fn = vfs_gluster_lstat,
+       .get_alloc_size_fn = vfs_gluster_get_alloc_size,
+       .unlink_fn = vfs_gluster_unlink,
+
+       .chmod_fn = vfs_gluster_chmod,
+       .fchmod_fn = vfs_gluster_fchmod,
+       .chown_fn = vfs_gluster_chown,
+       .fchown_fn = vfs_gluster_fchown,
+       .lchown_fn = vfs_gluster_lchown,
+       .chdir_fn = vfs_gluster_chdir,
+       .getwd_fn = vfs_gluster_getwd,
+       .ntimes_fn = vfs_gluster_ntimes,
+       .ftruncate_fn = vfs_gluster_ftruncate,
+       .fallocate_fn = vfs_gluster_fallocate,
+       .lock_fn = vfs_gluster_lock,
+       .kernel_flock_fn = vfs_gluster_kernel_flock,
+       .linux_setlease_fn = vfs_gluster_linux_setlease,
+       .getlock_fn = vfs_gluster_getlock,
+       .symlink_fn = vfs_gluster_symlink,
+       .readlink_fn = vfs_gluster_readlink,
+       .link_fn = vfs_gluster_link,
+       .mknod_fn = vfs_gluster_mknod,
+       .realpath_fn = vfs_gluster_realpath,
+       .notify_watch_fn = vfs_gluster_notify_watch,
+       .chflags_fn = vfs_gluster_chflags,
+       .file_id_create_fn = NULL,
+       .copy_chunk_send_fn = NULL,
+       .copy_chunk_recv_fn = NULL,
+       .streaminfo_fn = NULL,
+       .get_real_filename_fn = vfs_gluster_get_real_filename,
+       .connectpath_fn = vfs_gluster_connectpath,
+
+       .brl_lock_windows_fn = NULL,
+       .brl_unlock_windows_fn = NULL,
+       .brl_cancel_windows_fn = NULL,
+       .strict_lock_fn = NULL,
+       .strict_unlock_fn = NULL,
+       .translate_name_fn = NULL,
+       .fsctl_fn = NULL,
+
+       /* NT ACL Operations */
+       .fget_nt_acl_fn = NULL,
+       .get_nt_acl_fn = NULL,
+       .fset_nt_acl_fn = NULL,
+       .audit_file_fn = NULL,
+
+       /* Posix ACL Operations */
+       .chmod_acl_fn = NULL,   /* passthrough to default */
+       .fchmod_acl_fn = NULL,  /* passthrough to default */
+       .sys_acl_get_file_fn = vfs_gluster_sys_acl_get_file,
+       .sys_acl_get_fd_fn = vfs_gluster_sys_acl_get_fd,
+       .sys_acl_blob_get_file_fn = posix_sys_acl_blob_get_file,
+       .sys_acl_blob_get_fd_fn = posix_sys_acl_blob_get_fd,
+       .sys_acl_set_file_fn = vfs_gluster_sys_acl_set_file,
+       .sys_acl_set_fd_fn = vfs_gluster_sys_acl_set_fd,
+       .sys_acl_delete_def_file_fn = vfs_gluster_sys_acl_delete_def_file,
+
+       /* EA Operations */
+       .getxattr_fn = vfs_gluster_getxattr,
+       .fgetxattr_fn = vfs_gluster_fgetxattr,
+       .listxattr_fn = vfs_gluster_listxattr,
+       .flistxattr_fn = vfs_gluster_flistxattr,
+       .removexattr_fn = vfs_gluster_removexattr,
+       .fremovexattr_fn = vfs_gluster_fremovexattr,
+       .setxattr_fn = vfs_gluster_setxattr,
+       .fsetxattr_fn = vfs_gluster_fsetxattr,
+
+       /* AIO Operations */
+       .aio_force_fn = vfs_gluster_aio_force,
+
+       /* Offline Operations */
+       .is_offline_fn = vfs_gluster_is_offline,
+       .set_offline_fn = vfs_gluster_set_offline,
+
+       /* Durable handle Operations */
+       .durable_cookie_fn = NULL,
+       .durable_disconnect_fn = NULL,
+       .durable_reconnect_fn = NULL,
+};
+
+NTSTATUS vfs_glusterfs_init(void);
+NTSTATUS vfs_glusterfs_init(void)
+{
+       return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
+                               "glusterfs", &glusterfs_fns);
+}
diff --git a/source3/modules/wscript_build b/source3/modules/wscript_build
index 937dbde..7586e30 100644
--- a/source3/modules/wscript_build
+++ b/source3/modules/wscript_build
@@ -52,6 +52,7 @@ VFS_TIME_AUDIT_SRC = 'vfs_time_audit.c'
 VFS_MEDIA_HARMONY_SRC = 'vfs_media_harmony.c'
 VFS_BTRFS_SRC = 'vfs_btrfs.c'
 VFS_CEPH_SRC = 'vfs_ceph.c'
+VFS_GLUSTERFS_SRC = 'vfs_glusterfs.c'
 
 
 bld.SAMBA3_SUBSYSTEM('NFS4_ACLS',
@@ -522,3 +523,11 @@ bld.SAMBA3_MODULE('vfs_ceph',
                  internal_module=bld.SAMBA3_IS_STATIC_MODULE('vfs_ceph'),
                  enabled=bld.SAMBA3_IS_ENABLED_MODULE('vfs_ceph'),
                  cflags=bld.CONFIG_GET('CCFLAGS_CEPHFS'))
+
+bld.SAMBA3_MODULE('vfs_glusterfs',
+                  subsystem='vfs',
+                  source=VFS_GLUSTERFS_SRC,
+                  deps='samba-util',
+                  init_function='',
+                  internal_module=bld.SAMBA3_IS_STATIC_MODULE('vfs_glusterfs'),
+                  enabled=bld.SAMBA3_IS_ENABLED_MODULE('vfs_glusterfs'))
diff --git a/source3/wscript b/source3/wscript
index dba6cdc..0d07692 100644
--- a/source3/wscript
+++ b/source3/wscript
@@ -59,6 +59,11 @@ def set_options(opt):
                    help=("Directory under which libcephfs is installed"),
                    action="store", dest='libcephfs_dir', default=None)
 
+    opt.add_option('--enable-glusterfs',
+                   help=("Enable building vfs_glusterfs module"),
+                   action="store_true", dest='enable_glusterfs', default=True)
+    opt.add_option('--disable-glusterfs', help=SUPPRESS_HELP,
+                   action="store_false", dest='enable_glusterfs')
 
 
 def configure(conf):
@@ -1709,6 +1714,13 @@ main() {
     if conf.CHECK_HEADERS('cephfs/libcephfs.h', False, False, 'cephfs') and 
conf.CHECK_LIB('cephfs'):
         conf.DEFINE('HAVE_CEPH', '1')
 
+    conf.env.enable_glusterfs = Options.options.enable_glusterfs
+
+    if Options.options.enable_glusterfs:
+        conf.check_cfg(package='glusterfs-api', args='"glusterfs-api >= 4" 
--cflags --libs',
+                       uselib_store='GLUSTERFS', msg='Checking for 
glusterfs-api >= 4',
+                       mandatory=False)
+
     conf.env.build_regedit = False
     if not Options.options.with_regedit == False:
         conf.PROCESS_SEPARATE_RULE('system_ncurses')
@@ -1797,6 +1809,9 @@ main() {
     if conf.CONFIG_SET("HAVE_CEPH"):
         default_shared_modules.extend(TO_LIST('vfs_ceph'))
 
+    if conf.CONFIG_SET('HAVE_GLUSTERFS'):
+        default_shared_modules.extend(TO_LIST('vfs_glusterfs'))
+
     explicit_shared_modules = TO_LIST(Options.options.shared_modules, 
delimiter=',')
     explicit_static_modules = TO_LIST(Options.options.static_modules, 
delimiter=',')
 
-- 
1.7.1




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