source3/modules/vfs_glusterfs.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Wrap GlusterFS GFAPI calls in vfs functions.
   5
   6    Copyright (c) 2013 Anand Avati <avati@redhat.com>
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 /**
  23  * @file   vfs_glusterfs.c
  24  * @author Anand Avati <avati@redhat.com>
  25  * @date   May 2013
  26  * @brief  Samba VFS module for glusterfs
  27  *
  28  * @todo
  29  *   - sendfile/recvfile support
  30  *
  31  * A Samba VFS module for GlusterFS, based on Gluster's libgfapi.
  32  * This is a "bottom" vfs module (not something to be stacked on top of
  33  * another module), and translates (most) calls to the closest actions
  34  * available in libgfapi.
  35  *
  36  */
  37
  38 #include "includes.h"
  39 #include "smbd/smbd.h"
  40 #include <stdio.h>
  41 #include <glusterfs/api/glfs.h>
  42 #include "lib/util/dlinklist.h"
  43 #include "lib/util/tevent_unix.h"
  44 #include "smbd/globals.h"
  45 #include "lib/util/sys_rw.h"
  46 #include "smbprofile.h"
  47 #include "modules/posixacl_xattr.h"
  48
  49 #define DEFAULT_VOLFILE_SERVER "localhost"
  50
  51 static int read_fd = -1;
  52 static int write_fd = -1;
  53 static struct tevent_fd *aio_read_event = NULL;
  54
  55 /**
  56  * Helper to convert struct stat to struct stat_ex.
  57  */
  58 static void smb_stat_ex_from_stat(struct stat_ex *dst, const struct stat *src)
  59 {
  60         ZERO_STRUCTP(dst);
  61
  62         dst->st_ex_dev = src->st_dev;
  63         dst->st_ex_ino = src->st_ino;
  64         dst->st_ex_mode = src->st_mode;
  65         dst->st_ex_nlink = src->st_nlink;
  66         dst->st_ex_uid = src->st_uid;
  67         dst->st_ex_gid = src->st_gid;
  68         dst->st_ex_rdev = src->st_rdev;
  69         dst->st_ex_size = src->st_size;
  70         dst->st_ex_atime.tv_sec = src->st_atime;
  71         dst->st_ex_mtime.tv_sec = src->st_mtime;
  72         dst->st_ex_ctime.tv_sec = src->st_ctime;
  73         dst->st_ex_btime.tv_sec = src->st_mtime;
  74         dst->st_ex_blksize = src->st_blksize;
  75         dst->st_ex_blocks = src->st_blocks;
  76 #ifdef STAT_HAVE_NSEC
  77         dst->st_ex_atime.tv_nsec = src->st_atime_nsec;
  78         dst->st_ex_mtime.tv_nsec = src->st_mtime_nsec;
  79         dst->st_ex_ctime.tv_nsec = src->st_ctime_nsec;
  80         dst->st_ex_btime.tv_nsec = src->st_mtime_nsec;
  81 #endif
  82 }
  83
  84 /* pre-opened glfs_t */
  85
  86 static struct glfs_preopened {
  87         char *volume;
  88         char *connectpath;
  89         glfs_t *fs;
  90         int ref;
  91         struct glfs_preopened *next, *prev;
  92 } *glfs_preopened;
  93
  94
  95 static int glfs_set_preopened(const char *volume, const char *connectpath, glfs_t *fs)
  96 {
  97         struct glfs_preopened *entry = NULL;
  98
  99         entry = talloc_zero(NULL, struct glfs_preopened);
 100         if (!entry) {
 101                 errno = ENOMEM;
 102                 return -1;
 103         }
 104
 105         entry->volume = talloc_strdup(entry, volume);
 106         if (!entry->volume) {
 107                 talloc_free(entry);
 108                 errno = ENOMEM;
 109                 return -1;
 110         }
 111
 112         entry->connectpath = talloc_strdup(entry, connectpath);
 113         if (entry->connectpath == NULL) {
 114                 talloc_free(entry);
 115                 errno = ENOMEM;
 116                 return -1;
 117         }
 118
 119         entry->fs = fs;
 120         entry->ref = 1;
 121
 122         DLIST_ADD(glfs_preopened, entry);
 123
 124         return 0;
 125 }
 126
 127 static glfs_t *glfs_find_preopened(const char *volume, const char *connectpath)
 128 {
 129         struct glfs_preopened *entry = NULL;
 130
 131         for (entry = glfs_preopened; entry; entry = entry->next) {
 132                 if (strcmp(entry->volume, volume) == 0 &&
 133                     strcmp(entry->connectpath, connectpath) == 0)
 134                 {
 135                         entry->ref++;
 136                         return entry->fs;
 137                 }
 138         }
 139
 140         return NULL;
 141 }
 142
 143 static void glfs_clear_preopened(glfs_t *fs)
 144 {
 145         struct glfs_preopened *entry = NULL;
 146
 147         for (entry = glfs_preopened; entry; entry = entry->next) {
 148                 if (entry->fs == fs) {
 149                         if (--entry->ref)
 150                                 return;
 151
 152                         DLIST_REMOVE(glfs_preopened, entry);
 153
 154                         glfs_fini(entry->fs);
 155                         talloc_free(entry);
 156                 }
 157         }
 158 }
 159
 160 static int vfs_gluster_set_volfile_servers(glfs_t *fs,
 161                                            const char *volfile_servers)
 162 {
 163         char *server = NULL;
 164         int   server_count = 0;
 165         int   server_success = 0;
 166         int   ret = -1;
 167         TALLOC_CTX *frame = talloc_stackframe();
 168
 169         DBG_INFO("servers list %s\n", volfile_servers);
 170
 171         while (next_token_talloc(frame, &volfile_servers, &server, " \t")) {
 172                 char *transport = NULL;
 173                 char *host = NULL;
 174                 int   port = 0;
 175
 176                 server_count++;
 177                 DBG_INFO("server %d %s\n", server_count, server);
 178
 179                 /* Determine the transport type */
 180                 if (strncmp(server, "unix+", 5) == 0) {
 181                         port = 0;
 182                         transport = talloc_strdup(frame, "unix");
 183                         if (!transport) {
 184                                 errno = ENOMEM;
 185                                 goto out;
 186                         }
 187                         host = talloc_strdup(frame, server + 5);
 188                         if (!host) {
 189                                 errno = ENOMEM;
 190                                 goto out;
 191                         }
 192                 } else {
 193                         char *p = NULL;
 194                         char *port_index = NULL;
 195
 196                         if (strncmp(server, "tcp+", 4) == 0) {
 197                                 server += 4;
 198                         }
 199
 200                         /* IPv6 is enclosed in []
 201                          * ':' before ']' is part of IPv6
 202                          * ':' after  ']' indicates port
 203                          */
 204                         p = server;
 205                         if (server[0] == '[') {
 206                                 server++;
 207                                 p = index(server, ']');
 208                                 if (p == NULL) {
 209                                         /* Malformed IPv6 */
 210                                         continue;
 211                                 }
 212                                 p[0] = '\0';
 213                                 p++;
 214                         }
 215
 216                         port_index = index(p, ':');
 217
 218                         if (port_index == NULL) {
 219                                 port = 0;
 220                         } else {
 221                                 port = atoi(port_index + 1);
 222                                 port_index[0] = '\0';
 223                         }
 224                         transport = talloc_strdup(frame, "tcp");
 225                         if (!transport) {
 226                                 errno = ENOMEM;
 227                                 goto out;
 228                         }
 229                         host = talloc_strdup(frame, server);
 230                         if (!host) {
 231                                 errno = ENOMEM;
 232                                 goto out;
 233                         }
 234                 }
 235
 236                 DBG_INFO("Calling set volfile server with params "
 237                          "transport=%s, host=%s, port=%d\n", transport,
 238                           host, port);
 239
 240                 ret = glfs_set_volfile_server(fs, transport, host, port);
 241                 if (ret < 0) {
 242                         DBG_WARNING("Failed to set volfile_server "
 243                                     "transport=%s, host=%s, port=%d (%s)\n",
 244                                     transport, host, port, strerror(errno));
 245                 } else {
 246                         server_success++;
 247                 }
 248         }
 249
 250 out:
 251         if (server_count == 0) {
 252                 ret = -1;
 253         } else if (server_success < server_count) {
 254                 DBG_WARNING("Failed to set %d out of %d servers parsed\n",
 255                             server_count - server_success, server_count);
 256                 ret = 0;
 257         }
 258
 259         TALLOC_FREE(frame);
 260         return ret;
 261 }
 262
 263 /* Disk Operations */
 264
 265 static int vfs_gluster_connect(struct vfs_handle_struct *handle,
 266                                const char *service,
 267                                const char *user)
 268 {
 269         const char *volfile_servers;
 270         const char *volume;
 271         char *logfile;
 272         int loglevel;
 273         glfs_t *fs = NULL;
 274         TALLOC_CTX *tmp_ctx;
 275         int ret = 0;
 276
 277         tmp_ctx = talloc_new(NULL);
 278         if (tmp_ctx == NULL) {
 279                 ret = -1;
 280                 goto done;
 281         }
 282         logfile = lp_parm_talloc_string(tmp_ctx, SNUM(handle->conn), "glusterfs",
 283                                        "logfile", NULL);
 284
 285         loglevel = lp_parm_int(SNUM(handle->conn), "glusterfs", "loglevel", -1);
 286
 287         volfile_servers = lp_parm_talloc_string(tmp_ctx, SNUM(handle->conn),
 288                                                "glusterfs", "volfile_server",
 289                                                NULL);
 290         if (volfile_servers == NULL) {
 291                 volfile_servers = DEFAULT_VOLFILE_SERVER;
 292         }
 293
 294         volume = lp_parm_const_string(SNUM(handle->conn), "glusterfs", "volume",
 295                                       NULL);
 296         if (volume == NULL) {
 297                 volume = service;
 298         }
 299
 300         fs = glfs_find_preopened(volume, handle->conn->connectpath);
 301         if (fs) {
 302                 goto done;
 303         }
 304
 305         fs = glfs_new(volume);
 306         if (fs == NULL) {
 307                 ret = -1;
 308                 goto done;
 309         }
 310
 311         ret = vfs_gluster_set_volfile_servers(fs, volfile_servers);
 312         if (ret < 0) {
 313                 DBG_ERR("Failed to set volfile_servers from list %s\n",
 314                         volfile_servers);
 315                 goto done;
 316         }
 317
 318         ret = glfs_set_xlator_option(fs, "*-md-cache", "cache-posix-acl",
 319                                      "true");
 320         if (ret < 0) {
 321                 DEBUG(0, ("%s: Failed to set xlator options\n", volume));
 322                 goto done;
 323         }
 324
 325
 326         ret = glfs_set_xlator_option(fs, "*-snapview-client",
 327                                      "snapdir-entry-path",
 328                                      handle->conn->connectpath);
 329         if (ret < 0) {
 330                 DEBUG(0, ("%s: Failed to set xlator option:"
 331                           " snapdir-entry-path\n", volume));
 332                 goto done;
 333         }
 334
 335         ret = glfs_set_logging(fs, logfile, loglevel);
 336         if (ret < 0) {
 337                 DEBUG(0, ("%s: Failed to set logfile %s loglevel %d\n",
 338                           volume, logfile, loglevel));
 339                 goto done;
 340         }
 341
 342         ret = glfs_init(fs);
 343         if (ret < 0) {
 344                 DEBUG(0, ("%s: Failed to initialize volume (%s)\n",
 345                           volume, strerror(errno)));
 346                 goto done;
 347         }
 348
 349         ret = glfs_set_preopened(volume, handle->conn->connectpath, fs);
 350         if (ret < 0) {
 351                 DEBUG(0, ("%s: Failed to register volume (%s)\n",
 352                           volume, strerror(errno)));
 353                 goto done;
 354         }
 355
 356         /*
 357          * The shadow_copy2 module will fail to export subdirectories
 358          * of a gluster volume unless we specify the mount point,
 359          * because the detection fails if the file system is not
 360          * locally mounted:
 361          * https://bugzilla.samba.org/show_bug.cgi?id=13091
 362          */
 363         lp_do_parameter(SNUM(handle->conn), "shadow:mountpoint", "/");
 364
 365 done:
 366         if (ret < 0) {
 367                 if (fs)
 368                         glfs_fini(fs);
 369         } else {
 370                 DBG_ERR("%s: Initialized volume from servers %s\n",
 371                         volume, volfile_servers);
 372                 handle->data = fs;
 373         }
 374         talloc_free(tmp_ctx);
 375         return ret;
 376 }
 377
 378 static void vfs_gluster_disconnect(struct vfs_handle_struct *handle)
 379 {
 380         glfs_t *fs = NULL;
 381
 382         fs = handle->data;
 383
 384         glfs_clear_preopened(fs);
 385 }
 386
 387 static uint64_t vfs_gluster_disk_free(struct vfs_handle_struct *handle,
 388                                 const struct smb_filename *smb_fname,
 389                                 uint64_t *bsize_p,
 390                                 uint64_t *dfree_p,
 391                                 uint64_t *dsize_p)
 392 {
 393         struct statvfs statvfs = { 0, };
 394         int ret;
 395
 396         ret = glfs_statvfs(handle->data, smb_fname->base_name, &statvfs);
 397         if (ret < 0) {
 398                 return -1;
 399         }
 400
 401         if (bsize_p != NULL) {
 402                 *bsize_p = (uint64_t)statvfs.f_bsize; /* Block size */
 403         }
 404         if (dfree_p != NULL) {
 405                 *dfree_p = (uint64_t)statvfs.f_bavail; /* Available Block units */
 406         }
 407         if (dsize_p != NULL) {
 408                 *dsize_p = (uint64_t)statvfs.f_blocks; /* Total Block units */
 409         }
 410
 411         return (uint64_t)statvfs.f_bavail;
 412 }
 413
 414 static int vfs_gluster_get_quota(struct vfs_handle_struct *handle,
 415                                 const struct smb_filename *smb_fname,
 416                                 enum SMB_QUOTA_TYPE qtype,
 417                                 unid_t id,
 418                                 SMB_DISK_QUOTA *qt)
 419 {
 420         errno = ENOSYS;
 421         return -1;
 422 }
 423
 424 static int
 425 vfs_gluster_set_quota(struct vfs_handle_struct *handle,
 426                       enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt)
 427 {
 428         errno = ENOSYS;
 429         return -1;
 430 }
 431
 432 static int vfs_gluster_statvfs(struct vfs_handle_struct *handle,
 433                                 const struct smb_filename *smb_fname,
 434                                 struct vfs_statvfs_struct *vfs_statvfs)
 435 {
 436         struct statvfs statvfs = { 0, };
 437         int ret;
 438
 439         ret = glfs_statvfs(handle->data, smb_fname->base_name, &statvfs);
 440         if (ret < 0) {
 441                 DEBUG(0, ("glfs_statvfs(%s) failed: %s\n",
 442                           smb_fname->base_name, strerror(errno)));
 443                 return -1;
 444         }
 445
 446         ZERO_STRUCTP(vfs_statvfs);
 447
 448         vfs_statvfs->OptimalTransferSize = statvfs.f_frsize;
 449         vfs_statvfs->BlockSize = statvfs.f_bsize;
 450         vfs_statvfs->TotalBlocks = statvfs.f_blocks;
 451         vfs_statvfs->BlocksAvail = statvfs.f_bfree;
 452         vfs_statvfs->UserBlocksAvail = statvfs.f_bavail;
 453         vfs_statvfs->TotalFileNodes = statvfs.f_files;
 454         vfs_statvfs->FreeFileNodes = statvfs.f_ffree;
 455         vfs_statvfs->FsIdentifier = statvfs.f_fsid;
 456         vfs_statvfs->FsCapabilities =
 457             FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
 458
 459         return ret;
 460 }
 461
 462 static uint32_t vfs_gluster_fs_capabilities(struct vfs_handle_struct *handle,
 463                                             enum timestamp_set_resolution *p_ts_res)
 464 {
 465         uint32_t caps = FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
 466
 467 #ifdef HAVE_GFAPI_VER_6
 468         caps |= FILE_SUPPORTS_SPARSE_FILES;
 469 #endif
 470
 471 #ifdef STAT_HAVE_NSEC
 472         *p_ts_res = TIMESTAMP_SET_NT_OR_BETTER;
 473 #endif
 474
 475         return caps;
 476 }
 477
 478 static DIR *vfs_gluster_opendir(struct vfs_handle_struct *handle,
 479                                 const struct smb_filename *smb_fname,
 480                                 const char *mask,
 481                                 uint32_t attributes)
 482 {
 483         glfs_fd_t *fd;
 484
 485         fd = glfs_opendir(handle->data, smb_fname->base_name);
 486         if (fd == NULL) {
 487                 DEBUG(0, ("glfs_opendir(%s) failed: %s\n",
 488                           smb_fname->base_name, strerror(errno)));
 489         }
 490
 491         return (DIR *) fd;
 492 }
 493
 494 static DIR *vfs_gluster_fdopendir(struct vfs_handle_struct *handle,
 495                                   files_struct *fsp, const char *mask,
 496                                   uint32_t attributes)
 497 {
 498         return (DIR *) *(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp);
 499 }
 500
 501 static int vfs_gluster_closedir(struct vfs_handle_struct *handle, DIR *dirp)
 502 {
 503         return glfs_closedir((void *)dirp);
 504 }
 505
 506 static struct dirent *vfs_gluster_readdir(struct vfs_handle_struct *handle,
 507                                           DIR *dirp, SMB_STRUCT_STAT *sbuf)
 508 {
 509         static char direntbuf[512];
 510         int ret;
 511         struct stat stat;
 512         struct dirent *dirent = 0;
 513
 514         if (sbuf != NULL) {
 515                 ret = glfs_readdirplus_r((void *)dirp, &stat, (void *)direntbuf,
 516                                          &dirent);
 517         } else {
 518                 ret = glfs_readdir_r((void *)dirp, (void *)direntbuf, &dirent);
 519         }
 520
 521         if ((ret < 0) || (dirent == NULL)) {
 522                 return NULL;
 523         }
 524
 525         if (sbuf != NULL) {
 526                 smb_stat_ex_from_stat(sbuf, &stat);
 527         }
 528
 529         return dirent;
 530 }
 531
 532 static long vfs_gluster_telldir(struct vfs_handle_struct *handle, DIR *dirp)
 533 {
 534         return glfs_telldir((void *)dirp);
 535 }
 536
 537 static void vfs_gluster_seekdir(struct vfs_handle_struct *handle, DIR *dirp,
 538                                 long offset)
 539 {
 540         glfs_seekdir((void *)dirp, offset);
 541 }
 542
 543 static void vfs_gluster_rewinddir(struct vfs_handle_struct *handle, DIR *dirp)
 544 {
 545         glfs_seekdir((void *)dirp, 0);
 546 }
 547
 548 static int vfs_gluster_mkdir(struct vfs_handle_struct *handle,
 549                              const struct smb_filename *smb_fname,
 550                              mode_t mode)
 551 {
 552         return glfs_mkdir(handle->data, smb_fname->base_name, mode);
 553 }
 554
 555 static int vfs_gluster_rmdir(struct vfs_handle_struct *handle,
 556                         const struct smb_filename *smb_fname)
 557 {
 558         return glfs_rmdir(handle->data, smb_fname->base_name);
 559 }
 560
 561 static int vfs_gluster_open(struct vfs_handle_struct *handle,
 562                             struct smb_filename *smb_fname, files_struct *fsp,
 563                             int flags, mode_t mode)
 564 {
 565         glfs_fd_t *glfd;
 566         glfs_fd_t **p_tmp;
 567
 568         if (flags & O_DIRECTORY) {
 569                 glfd = glfs_opendir(handle->data, smb_fname->base_name);
 570         } else if (flags & O_CREAT) {
 571                 glfd = glfs_creat(handle->data, smb_fname->base_name, flags,
 572                                   mode);
 573         } else {
 574                 glfd = glfs_open(handle->data, smb_fname->base_name, flags);
 575         }
 576
 577         if (glfd == NULL) {
 578                 return -1;
 579         }
 580         p_tmp = VFS_ADD_FSP_EXTENSION(handle, fsp, glfs_fd_t *, NULL);
 581         *p_tmp = glfd;
 582         /* An arbitrary value for error reporting, so you know its us. */
 583         return 13371337;
 584 }
 585
 586 static int vfs_gluster_close(struct vfs_handle_struct *handle,
 587                              files_struct *fsp)
 588 {
 589         glfs_fd_t *glfd;
 590         glfd = *(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp);
 591         VFS_REMOVE_FSP_EXTENSION(handle, fsp);
 592         return glfs_close(glfd);
 593 }
 594
 595 static ssize_t vfs_gluster_read(struct vfs_handle_struct *handle,
 596                                 files_struct *fsp, void *data, size_t n)
 597 {
 598         return glfs_read(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), data, n, 0);
 599 }
 600
 601 static ssize_t vfs_gluster_pread(struct vfs_handle_struct *handle,
 602                                  files_struct *fsp, void *data, size_t n,
 603                                  off_t offset)
 604 {
 605         return glfs_pread(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), data, n, offset, 0);
 606 }
 607
 608 struct glusterfs_aio_state;
 609
 610 struct glusterfs_aio_wrapper {
 611         struct glusterfs_aio_state *state;
 612 };
 613
 614 struct glusterfs_aio_state {
 615         ssize_t ret;
 616         struct tevent_req *req;
 617         bool cancelled;
 618         struct vfs_aio_state vfs_aio_state;
 619         struct timespec start;
 620 };
 621
 622 static int aio_wrapper_destructor(struct glusterfs_aio_wrapper *wrap)
 623 {
 624         if (wrap->state != NULL) {
 625                 wrap->state->cancelled = true;
 626         }
 627
 628         return 0;
 629 }
 630
 631 /*
 632  * This function is the callback that will be called on glusterfs
 633  * threads once the async IO submitted is complete. To notify
 634  * Samba of the completion we use a pipe based queue.
 635  */
 636 static void aio_glusterfs_done(glfs_fd_t *fd, ssize_t ret, void *data)
 637 {
 638         struct glusterfs_aio_state *state = NULL;
 639         int sts = 0;
 640         struct timespec end;
 641
 642         state = (struct glusterfs_aio_state *)data;
 643
 644         PROFILE_TIMESTAMP(&end);
 645
 646         if (ret < 0) {
 647                 state->ret = -1;
 648                 state->vfs_aio_state.error = errno;
 649         } else {
 650                 state->ret = ret;
 651         }
 652         state->vfs_aio_state.duration = nsec_time_diff(&end, &state->start);
 653
 654         /*
 655          * Write the state pointer to glusterfs_aio_state to the
 656          * pipe, so we can call tevent_req_done() from the main thread,
 657          * because tevent_req_done() is not designed to be executed in
 658          * the multithread environment, so tevent_req_done() must be
 659          * executed from the smbd main thread.
 660          *
 661          * write(2) on pipes with sizes under _POSIX_PIPE_BUF
 662          * in size is atomic, without this, the use op pipes in this
 663          * code would not work.
 664          *
 665          * sys_write is a thin enough wrapper around write(2)
 666          * that we can trust it here.
 667          */
 668
 669         sts = sys_write(write_fd, &state, sizeof(struct glusterfs_aio_state *));
 670         if (sts < 0) {
 671                 DEBUG(0,("\nWrite to pipe failed (%s)", strerror(errno)));
 672         }
 673
 674         return;
 675 }
 676
 677 /*
 678  * Read each req off the pipe and process it.
 679  */
 680 static void aio_tevent_fd_done(struct tevent_context *event_ctx,
 681                                 struct tevent_fd *fde,
 682                                 uint16_t flags, void *data)
 683 {
 684         struct tevent_req *req = NULL;
 685         struct glusterfs_aio_state *state = NULL;
 686         int sts = 0;
 687
 688         /*
 689          * read(2) on pipes is atomic if the needed data is available
 690          * in the pipe, per SUS and POSIX.  Because we always write
 691          * to the pipe in sizeof(struct tevent_req *) chunks, we can
 692          * always read in those chunks, atomically.
 693          *
 694          * sys_read is a thin enough wrapper around read(2) that we
 695          * can trust it here.
 696          */
 697
 698         sts = sys_read(read_fd, &state, sizeof(struct glusterfs_aio_state *));
 699
 700         if (sts < 0) {
 701                 DEBUG(0,("\nRead from pipe failed (%s)", strerror(errno)));
 702         }
 703
 704         /* if we've cancelled the op, there is no req, so just clean up. */
 705         if (state->cancelled == true) {
 706                 TALLOC_FREE(state);
 707                 return;
 708         }
 709
 710         req = state->req;
 711
 712         if (req) {
 713                 tevent_req_done(req);
 714         }
 715         return;
 716 }
 717
 718 static bool init_gluster_aio(struct vfs_handle_struct *handle)
 719 {
 720         int fds[2];
 721         int ret = -1;
 722
 723         if (read_fd != -1) {
 724                 /*
 725                  * Already initialized.
 726                  */
 727                 return true;
 728         }
 729
 730         ret = pipe(fds);
 731         if (ret == -1) {
 732                 goto fail;
 733         }
 734
 735         read_fd = fds[0];
 736         write_fd = fds[1];
 737
 738         aio_read_event = tevent_add_fd(handle->conn->sconn->ev_ctx,
 739                                         NULL,
 740                                         read_fd,
 741                                         TEVENT_FD_READ,
 742                                         aio_tevent_fd_done,
 743                                         NULL);
 744         if (aio_read_event == NULL) {
 745                 goto fail;
 746         }
 747
 748         return true;
 749 fail:
 750         TALLOC_FREE(aio_read_event);
 751         if (read_fd != -1) {
 752                 close(read_fd);
 753                 close(write_fd);
 754                 read_fd = -1;
 755                 write_fd = -1;
 756         }
 757         return false;
 758 }
 759
 760 static struct glusterfs_aio_state *aio_state_create(TALLOC_CTX *mem_ctx)
 761 {
 762         struct tevent_req *req = NULL;
 763         struct glusterfs_aio_state *state = NULL;
 764         struct glusterfs_aio_wrapper *wrapper = NULL;
 765
 766         req = tevent_req_create(mem_ctx, &wrapper, struct glusterfs_aio_wrapper);
 767
 768         if (req == NULL) {
 769                 return NULL;
 770         }
 771
 772         state = talloc_zero(NULL, struct glusterfs_aio_state);
 773
 774         if (state == NULL) {
 775                 TALLOC_FREE(req);
 776                 return NULL;
 777         }
 778
 779         talloc_set_destructor(wrapper, aio_wrapper_destructor);
 780         state->cancelled = false;
 781         state->req = req;
 782
 783         wrapper->state = state;
 784
 785         return state;
 786 }
 787
 788 static struct tevent_req *vfs_gluster_pread_send(struct vfs_handle_struct
 789                                                   *handle, TALLOC_CTX *mem_ctx,
 790                                                   struct tevent_context *ev,
 791                                                   files_struct *fsp,
 792                                                   void *data, size_t n,
 793                                                   off_t offset)
 794 {
 795         struct glusterfs_aio_state *state = NULL;
 796         struct tevent_req *req = NULL;
 797         int ret = 0;
 798
 799         state = aio_state_create(mem_ctx);
 800
 801         if (state == NULL) {
 802                 return NULL;
 803         }
 804
 805         req = state->req;
 806
 807         if (!init_gluster_aio(handle)) {
 808                 tevent_req_error(req, EIO);
 809                 return tevent_req_post(req, ev);
 810         }
 811
 812         PROFILE_TIMESTAMP(&state->start);
 813         ret = glfs_pread_async(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle,
 814                                 fsp), data, n, offset, 0, aio_glusterfs_done,
 815                                 state);
 816         if (ret < 0) {
 817                 tevent_req_error(req, -ret);
 818                 return tevent_req_post(req, ev);
 819         }
 820
 821         return req;
 822 }
 823
 824 static struct tevent_req *vfs_gluster_pwrite_send(struct vfs_handle_struct
 825                                                   *handle, TALLOC_CTX *mem_ctx,
 826                                                   struct tevent_context *ev,
 827                                                   files_struct *fsp,
 828                                                   const void *data, size_t n,
 829                                                   off_t offset)
 830 {
 831         struct glusterfs_aio_state *state = NULL;
 832         struct tevent_req *req = NULL;
 833         int ret = 0;
 834
 835         state = aio_state_create(mem_ctx);
 836
 837         if (state == NULL) {
 838                 return NULL;
 839         }
 840
 841         req = state->req;
 842
 843         if (!init_gluster_aio(handle)) {
 844                 tevent_req_error(req, EIO);
 845                 return tevent_req_post(req, ev);
 846         }
 847
 848         PROFILE_TIMESTAMP(&state->start);
 849         ret = glfs_pwrite_async(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle,
 850                                 fsp), data, n, offset, 0, aio_glusterfs_done,
 851                                 state);
 852         if (ret < 0) {
 853                 tevent_req_error(req, -ret);
 854                 return tevent_req_post(req, ev);
 855         }
 856
 857         return req;
 858 }
 859
 860 static ssize_t vfs_gluster_recv(struct tevent_req *req,
 861                                 struct vfs_aio_state *vfs_aio_state)
 862 {
 863         struct glusterfs_aio_wrapper *wrapper = NULL;
 864         int ret = 0;
 865
 866         wrapper = tevent_req_data(req, struct glusterfs_aio_wrapper);
 867
 868         if (wrapper == NULL) {
 869                 return -1;
 870         }
 871
 872         if (wrapper->state == NULL) {
 873                 return -1;
 874         }
 875
 876         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
 877                 return -1;
 878         }
 879
 880         *vfs_aio_state = wrapper->state->vfs_aio_state;
 881         ret = wrapper->state->ret;
 882
 883         /* Clean up the state, it is in a NULL context. */
 884
 885         TALLOC_FREE(wrapper->state);
 886
 887         return ret;
 888 }
 889
 890 static ssize_t vfs_gluster_write(struct vfs_handle_struct *handle,
 891                                  files_struct *fsp, const void *data, size_t n)
 892 {
 893         return glfs_write(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), data, n, 0);
 894 }
 895
 896 static ssize_t vfs_gluster_pwrite(struct vfs_handle_struct *handle,
 897                                   files_struct *fsp, const void *data,
 898                                   size_t n, off_t offset)
 899 {
 900         return glfs_pwrite(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), data, n, offset, 0);
 901 }
 902
 903 static off_t vfs_gluster_lseek(struct vfs_handle_struct *handle,
 904                                files_struct *fsp, off_t offset, int whence)
 905 {
 906         return glfs_lseek(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), offset, whence);
 907 }
 908
 909 static ssize_t vfs_gluster_sendfile(struct vfs_handle_struct *handle, int tofd,
 910                                     files_struct *fromfsp,
 911                                     const DATA_BLOB *hdr,
 912                                     off_t offset, size_t n)
 913 {
 914         errno = ENOTSUP;
 915         return -1;
 916 }
 917
 918 static ssize_t vfs_gluster_recvfile(struct vfs_handle_struct *handle,
 919                                     int fromfd, files_struct *tofsp,
 920                                     off_t offset, size_t n)
 921 {
 922         errno = ENOTSUP;
 923         return -1;
 924 }
 925
 926 static int vfs_gluster_rename(struct vfs_handle_struct *handle,
 927                               const struct smb_filename *smb_fname_src,
 928                               const struct smb_filename *smb_fname_dst)
 929 {
 930         return glfs_rename(handle->data, smb_fname_src->base_name,
 931                            smb_fname_dst->base_name);
 932 }
 933
 934 static int vfs_gluster_fsync(struct vfs_handle_struct *handle,
 935                              files_struct *fsp)
 936 {
 937         return glfs_fsync(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp));
 938 }
 939
 940 static struct tevent_req *vfs_gluster_fsync_send(struct vfs_handle_struct
 941                                                  *handle, TALLOC_CTX *mem_ctx,
 942                                                  struct tevent_context *ev,
 943                                                  files_struct *fsp)
 944 {
 945         struct tevent_req *req = NULL;
 946         struct glusterfs_aio_state *state = NULL;
 947         int ret = 0;
 948
 949         state = aio_state_create(mem_ctx);
 950
 951         if (state == NULL) {
 952                 return NULL;
 953         }
 954
 955         req = state->req;
 956
 957         if (!init_gluster_aio(handle)) {
 958                 tevent_req_error(req, EIO);
 959                 return tevent_req_post(req, ev);
 960         }
 961
 962         PROFILE_TIMESTAMP(&state->start);
 963         ret = glfs_fsync_async(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle,
 964                                 fsp), aio_glusterfs_done, req);
 965         if (ret < 0) {
 966                 tevent_req_error(req, -ret);
 967                 return tevent_req_post(req, ev);
 968         }
 969         return req;
 970 }
 971
 972 static int vfs_gluster_fsync_recv(struct tevent_req *req,
 973                                   struct vfs_aio_state *vfs_aio_state)
 974 {
 975         /*
 976          * Use implicit conversion ssize_t->int
 977          */
 978         return vfs_gluster_recv(req, vfs_aio_state);
 979 }
 980
 981 static int vfs_gluster_stat(struct vfs_handle_struct *handle,
 982                             struct smb_filename *smb_fname)
 983 {
 984         struct stat st;
 985         int ret;
 986
 987         ret = glfs_stat(handle->data, smb_fname->base_name, &st);
 988         if (ret == 0) {
 989                 smb_stat_ex_from_stat(&smb_fname->st, &st);
 990         }
 991         if (ret < 0 && errno != ENOENT) {
 992                 DEBUG(0, ("glfs_stat(%s) failed: %s\n",
 993                           smb_fname->base_name, strerror(errno)));
 994         }
 995         return ret;
 996 }
 997
 998 static int vfs_gluster_fstat(struct vfs_handle_struct *handle,
 999                              files_struct *fsp, SMB_STRUCT_STAT *sbuf)
1000 {
1001         struct stat st;
1002         int ret;
1003
1004         ret = glfs_fstat(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), &st);
1005         if (ret == 0) {
1006                 smb_stat_ex_from_stat(sbuf, &st);
1007         }
1008         if (ret < 0) {
1009                 DEBUG(0, ("glfs_fstat(%d) failed: %s\n",
1010                           fsp->fh->fd, strerror(errno)));
1011         }
1012         return ret;
1013 }
1014
1015 static int vfs_gluster_lstat(struct vfs_handle_struct *handle,
1016                              struct smb_filename *smb_fname)
1017 {
1018         struct stat st;
1019         int ret;
1020
1021         ret = glfs_lstat(handle->data, smb_fname->base_name, &st);
1022         if (ret == 0) {
1023                 smb_stat_ex_from_stat(&smb_fname->st, &st);
1024         }
1025         if (ret < 0 && errno != ENOENT) {
1026                 DEBUG(0, ("glfs_lstat(%s) failed: %s\n",
1027                           smb_fname->base_name, strerror(errno)));
1028         }
1029         return ret;
1030 }
1031
1032 static uint64_t vfs_gluster_get_alloc_size(struct vfs_handle_struct *handle,
1033                                            files_struct *fsp,
1034                                            const SMB_STRUCT_STAT *sbuf)
1035 {
1036         return sbuf->st_ex_blocks * 512;
1037 }
1038
1039 static int vfs_gluster_unlink(struct vfs_handle_struct *handle,
1040                               const struct smb_filename *smb_fname)
1041 {
1042         return glfs_unlink(handle->data, smb_fname->base_name);
1043 }
1044
1045 static int vfs_gluster_chmod(struct vfs_handle_struct *handle,
1046                                 const struct smb_filename *smb_fname,
1047                                 mode_t mode)
1048 {
1049         return glfs_chmod(handle->data, smb_fname->base_name, mode);
1050 }
1051
1052 static int vfs_gluster_fchmod(struct vfs_handle_struct *handle,
1053                               files_struct *fsp, mode_t mode)
1054 {
1055         return glfs_fchmod(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), mode);
1056 }
1057
1058 static int vfs_gluster_chown(struct vfs_handle_struct *handle,
1059                         const struct smb_filename *smb_fname,
1060                         uid_t uid,
1061                         gid_t gid)
1062 {
1063         return glfs_chown(handle->data, smb_fname->base_name, uid, gid);
1064 }
1065
1066 static int vfs_gluster_fchown(struct vfs_handle_struct *handle,
1067                               files_struct *fsp, uid_t uid, gid_t gid)
1068 {
1069         return glfs_fchown(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), uid, gid);
1070 }
1071
1072 static int vfs_gluster_lchown(struct vfs_handle_struct *handle,
1073                         const struct smb_filename *smb_fname,
1074                         uid_t uid,
1075                         gid_t gid)
1076 {
1077         return glfs_lchown(handle->data, smb_fname->base_name, uid, gid);
1078 }
1079
1080 static int vfs_gluster_chdir(struct vfs_handle_struct *handle,
1081                         const struct smb_filename *smb_fname)
1082 {
1083         return glfs_chdir(handle->data, smb_fname->base_name);
1084 }
1085
1086 static struct smb_filename *vfs_gluster_getwd(struct vfs_handle_struct *handle,
1087                                 TALLOC_CTX *ctx)
1088 {
1089         char *cwd;
1090         char *ret;
1091         struct smb_filename *smb_fname = NULL;
1092
1093         cwd = SMB_CALLOC_ARRAY(char, PATH_MAX);
1094         if (cwd == NULL) {
1095                 return NULL;
1096         }
1097
1098         ret = glfs_getcwd(handle->data, cwd, PATH_MAX - 1);
1099         if (ret == NULL) {
1100                 SAFE_FREE(cwd);
1101                 return NULL;
1102         }
1103         smb_fname = synthetic_smb_fname(ctx,
1104                                         ret,
1105                                         NULL,
1106                                         NULL,
1107                                         0);
1108         SAFE_FREE(cwd);
1109         return smb_fname;
1110 }
1111
1112 static int vfs_gluster_ntimes(struct vfs_handle_struct *handle,
1113                               const struct smb_filename *smb_fname,
1114                               struct smb_file_time *ft)
1115 {
1116         struct timespec times[2];
1117
1118         if (null_timespec(ft->atime)) {
1119                 times[0].tv_sec = smb_fname->st.st_ex_atime.tv_sec;
1120                 times[0].tv_nsec = smb_fname->st.st_ex_atime.tv_nsec;
1121         } else {
1122                 times[0].tv_sec = ft->atime.tv_sec;
1123                 times[0].tv_nsec = ft->atime.tv_nsec;
1124         }
1125
1126         if (null_timespec(ft->mtime)) {
1127                 times[1].tv_sec = smb_fname->st.st_ex_mtime.tv_sec;
1128                 times[1].tv_nsec = smb_fname->st.st_ex_mtime.tv_nsec;
1129         } else {
1130                 times[1].tv_sec = ft->mtime.tv_sec;
1131                 times[1].tv_nsec = ft->mtime.tv_nsec;
1132         }
1133
1134         if ((timespec_compare(&times[0],
1135                               &smb_fname->st.st_ex_atime) == 0) &&
1136             (timespec_compare(&times[1],
1137                               &smb_fname->st.st_ex_mtime) == 0)) {
1138                 return 0;
1139         }
1140
1141         return glfs_utimens(handle->data, smb_fname->base_name, times);
1142 }
1143
1144 static int vfs_gluster_ftruncate(struct vfs_handle_struct *handle,
1145                                  files_struct *fsp, off_t offset)
1146 {
1147         return glfs_ftruncate(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), offset);
1148 }
1149
1150 static int vfs_gluster_fallocate(struct vfs_handle_struct *handle,
1151                                  struct files_struct *fsp,
1152                                  uint32_t mode,
1153                                  off_t offset, off_t len)
1154 {
1155 #ifdef HAVE_GFAPI_VER_6
1156         int keep_size, punch_hole;
1157
1158         keep_size = mode & VFS_FALLOCATE_FL_KEEP_SIZE;
1159         punch_hole = mode & VFS_FALLOCATE_FL_PUNCH_HOLE;
1160
1161         mode &= ~(VFS_FALLOCATE_FL_KEEP_SIZE|VFS_FALLOCATE_FL_PUNCH_HOLE);
1162         if (mode != 0) {
1163                 errno = ENOTSUP;
1164                 return -1;
1165         }
1166
1167         if (punch_hole) {
1168                 return glfs_discard(*(glfs_fd_t **)
1169                                     VFS_FETCH_FSP_EXTENSION(handle, fsp),
1170                                     offset, len);
1171         }
1172
1173         return glfs_fallocate(*(glfs_fd_t **)
1174                               VFS_FETCH_FSP_EXTENSION(handle, fsp),
1175                               keep_size, offset, len);
1176 #else
1177         errno = ENOTSUP;
1178         return -1;
1179 #endif
1180 }
1181
1182 static struct smb_filename *vfs_gluster_realpath(struct vfs_handle_struct *handle,
1183                                 TALLOC_CTX *ctx,
1184                                 const struct smb_filename *smb_fname)
1185 {
1186         char *result = NULL;
1187         struct smb_filename *result_fname = NULL;
1188         char *resolved_path = SMB_MALLOC_ARRAY(char, PATH_MAX+1);
1189
1190         if (resolved_path == NULL) {
1191                 errno = ENOMEM;
1192                 return NULL;
1193         }
1194
1195         result = glfs_realpath(handle->data,
1196                         smb_fname->base_name,
1197                         resolved_path);
1198         if (result != NULL) {
1199                 result_fname = synthetic_smb_fname(ctx, result, NULL, NULL, 0);
1200         }
1201
1202         SAFE_FREE(resolved_path);
1203         return result_fname;
1204 }
1205
1206 static bool vfs_gluster_lock(struct vfs_handle_struct *handle,
1207                              files_struct *fsp, int op, off_t offset,
1208                              off_t count, int type)
1209 {
1210         struct flock flock = { 0, };
1211         int ret;
1212
1213         flock.l_type = type;
1214         flock.l_whence = SEEK_SET;
1215         flock.l_start = offset;
1216         flock.l_len = count;
1217         flock.l_pid = 0;
1218
1219         ret = glfs_posix_lock(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), op, &flock);
1220
1221         if (op == F_GETLK) {
1222                 /* lock query, true if someone else has locked */
1223                 if ((ret != -1) &&
1224                     (flock.l_type != F_UNLCK) &&
1225                     (flock.l_pid != 0) && (flock.l_pid != getpid()))
1226                         return true;
1227                 /* not me */
1228                 return false;
1229         }
1230
1231         if (ret == -1) {
1232                 return false;
1233         }
1234
1235         return true;
1236 }
1237
1238 static int vfs_gluster_kernel_flock(struct vfs_handle_struct *handle,
1239                                     files_struct *fsp, uint32_t share_mode,
1240                                     uint32_t access_mask)
1241 {
1242         errno = ENOSYS;
1243         return -1;
1244 }
1245
1246 static int vfs_gluster_linux_setlease(struct vfs_handle_struct *handle,
1247                                       files_struct *fsp, int leasetype)
1248 {
1249         errno = ENOSYS;
1250         return -1;
1251 }
1252
1253 static bool vfs_gluster_getlock(struct vfs_handle_struct *handle,
1254                                 files_struct *fsp, off_t *poffset,
1255                                 off_t *pcount, int *ptype, pid_t *ppid)
1256 {
1257         struct flock flock = { 0, };
1258         int ret;
1259
1260         flock.l_type = *ptype;
1261         flock.l_whence = SEEK_SET;
1262         flock.l_start = *poffset;
1263         flock.l_len = *pcount;
1264         flock.l_pid = 0;
1265
1266         ret = glfs_posix_lock(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), F_GETLK, &flock);
1267
1268         if (ret == -1) {
1269                 return false;
1270         }
1271
1272         *ptype = flock.l_type;
1273         *poffset = flock.l_start;
1274         *pcount = flock.l_len;
1275         *ppid = flock.l_pid;
1276
1277         return true;
1278 }
1279
1280 static int vfs_gluster_symlink(struct vfs_handle_struct *handle,
1281                                 const char *link_target,
1282                                 const struct smb_filename *new_smb_fname)
1283 {
1284         return glfs_symlink(handle->data,
1285                         link_target,
1286                         new_smb_fname->base_name);
1287 }
1288
1289 static int vfs_gluster_readlink(struct vfs_handle_struct *handle,
1290                                 const struct smb_filename *smb_fname,
1291                                 char *buf,
1292                                 size_t bufsiz)
1293 {
1294         return glfs_readlink(handle->data, smb_fname->base_name, buf, bufsiz);
1295 }
1296
1297 static int vfs_gluster_link(struct vfs_handle_struct *handle,
1298                                 const struct smb_filename *old_smb_fname,
1299                                 const struct smb_filename *new_smb_fname)
1300 {
1301         return glfs_link(handle->data,
1302                         old_smb_fname->base_name,
1303                         new_smb_fname->base_name);
1304 }
1305
1306 static int vfs_gluster_mknod(struct vfs_handle_struct *handle,
1307                                 const struct smb_filename *smb_fname,
1308                                 mode_t mode,
1309                                 SMB_DEV_T dev)
1310 {
1311         return glfs_mknod(handle->data, smb_fname->base_name, mode, dev);
1312 }
1313
1314 static int vfs_gluster_chflags(struct vfs_handle_struct *handle,
1315                                 const struct smb_filename *smb_fname,
1316                                 unsigned int flags)
1317 {
1318         errno = ENOSYS;
1319         return -1;
1320 }
1321
1322 static int vfs_gluster_get_real_filename(struct vfs_handle_struct *handle,
1323                                          const char *path, const char *name,
1324                                          TALLOC_CTX *mem_ctx, char **found_name)
1325 {
1326         int ret;
1327         char key_buf[NAME_MAX + 64];
1328         char val_buf[NAME_MAX + 1];
1329
1330         if (strlen(name) >= NAME_MAX) {
1331                 errno = ENAMETOOLONG;
1332                 return -1;
1333         }
1334
1335         snprintf(key_buf, NAME_MAX + 64,
1336                  "glusterfs.get_real_filename:%s", name);
1337
1338         ret = glfs_getxattr(handle->data, path, key_buf, val_buf, NAME_MAX + 1);
1339         if (ret == -1) {
1340                 if (errno == ENODATA) {
1341                         errno = EOPNOTSUPP;
1342                 }
1343                 return -1;
1344         }
1345
1346         *found_name = talloc_strdup(mem_ctx, val_buf);
1347         if (found_name[0] == NULL) {
1348                 errno = ENOMEM;
1349                 return -1;
1350         }
1351         return 0;
1352 }
1353
1354 static const char *vfs_gluster_connectpath(struct vfs_handle_struct *handle,
1355                                 const struct smb_filename *smb_fname)
1356 {
1357         return handle->conn->connectpath;
1358 }
1359
1360 /* EA Operations */
1361
1362 static ssize_t vfs_gluster_getxattr(struct vfs_handle_struct *handle,
1363                                 const struct smb_filename *smb_fname,
1364                                 const char *name,
1365                                 void *value,
1366                                 size_t size)
1367 {
1368         return glfs_getxattr(handle->data, smb_fname->base_name,
1369                         name, value, size);
1370 }
1371
1372 static ssize_t vfs_gluster_fgetxattr(struct vfs_handle_struct *handle,
1373                                      files_struct *fsp, const char *name,
1374                                      void *value, size_t size)
1375 {
1376         return glfs_fgetxattr(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), name, value, size);
1377 }
1378
1379 static ssize_t vfs_gluster_listxattr(struct vfs_handle_struct *handle,
1380                                 const struct smb_filename *smb_fname,
1381                                 char *list,
1382                                 size_t size)
1383 {
1384         return glfs_listxattr(handle->data, smb_fname->base_name, list, size);
1385 }
1386
1387 static ssize_t vfs_gluster_flistxattr(struct vfs_handle_struct *handle,
1388                                       files_struct *fsp, char *list,
1389                                       size_t size)
1390 {
1391         return glfs_flistxattr(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), list, size);
1392 }
1393
1394 static int vfs_gluster_removexattr(struct vfs_handle_struct *handle,
1395                                 const struct smb_filename *smb_fname,
1396                                 const char *name)
1397 {
1398         return glfs_removexattr(handle->data, smb_fname->base_name, name);
1399 }
1400
1401 static int vfs_gluster_fremovexattr(struct vfs_handle_struct *handle,
1402                                     files_struct *fsp, const char *name)
1403 {
1404         return glfs_fremovexattr(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), name);
1405 }
1406
1407 static int vfs_gluster_setxattr(struct vfs_handle_struct *handle,
1408                                 const struct smb_filename *smb_fname,
1409                                 const char *name,
1410                                 const void *value, size_t size, int flags)
1411 {
1412         return glfs_setxattr(handle->data, smb_fname->base_name, name, value, size, flags);
1413 }
1414
1415 static int vfs_gluster_fsetxattr(struct vfs_handle_struct *handle,
1416                                  files_struct *fsp, const char *name,
1417                                  const void *value, size_t size, int flags)
1418 {
1419         return glfs_fsetxattr(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), name, value, size,
1420                               flags);
1421 }
1422
1423 /* AIO Operations */
1424
1425 static bool vfs_gluster_aio_force(struct vfs_handle_struct *handle,
1426                                   files_struct *fsp)
1427 {
1428         return false;
1429 }
1430
1431 static struct vfs_fn_pointers glusterfs_fns = {
1432
1433         /* Disk Operations */
1434
1435         .connect_fn = vfs_gluster_connect,
1436         .disconnect_fn = vfs_gluster_disconnect,
1437         .disk_free_fn = vfs_gluster_disk_free,
1438         .get_quota_fn = vfs_gluster_get_quota,
1439         .set_quota_fn = vfs_gluster_set_quota,
1440         .statvfs_fn = vfs_gluster_statvfs,
1441         .fs_capabilities_fn = vfs_gluster_fs_capabilities,
1442
1443         .get_dfs_referrals_fn = NULL,
1444
1445         /* Directory Operations */
1446
1447         .opendir_fn = vfs_gluster_opendir,
1448         .fdopendir_fn = vfs_gluster_fdopendir,
1449         .readdir_fn = vfs_gluster_readdir,
1450         .seekdir_fn = vfs_gluster_seekdir,
1451         .telldir_fn = vfs_gluster_telldir,
1452         .rewind_dir_fn = vfs_gluster_rewinddir,
1453         .mkdir_fn = vfs_gluster_mkdir,
1454         .rmdir_fn = vfs_gluster_rmdir,
1455         .closedir_fn = vfs_gluster_closedir,
1456
1457         /* File Operations */
1458
1459         .open_fn = vfs_gluster_open,
1460         .create_file_fn = NULL,
1461         .close_fn = vfs_gluster_close,
1462         .read_fn = vfs_gluster_read,
1463         .pread_fn = vfs_gluster_pread,
1464         .pread_send_fn = vfs_gluster_pread_send,
1465         .pread_recv_fn = vfs_gluster_recv,
1466         .write_fn = vfs_gluster_write,
1467         .pwrite_fn = vfs_gluster_pwrite,
1468         .pwrite_send_fn = vfs_gluster_pwrite_send,
1469         .pwrite_recv_fn = vfs_gluster_recv,
1470         .lseek_fn = vfs_gluster_lseek,
1471         .sendfile_fn = vfs_gluster_sendfile,
1472         .recvfile_fn = vfs_gluster_recvfile,
1473         .rename_fn = vfs_gluster_rename,
1474         .fsync_fn = vfs_gluster_fsync,
1475         .fsync_send_fn = vfs_gluster_fsync_send,
1476         .fsync_recv_fn = vfs_gluster_fsync_recv,
1477
1478         .stat_fn = vfs_gluster_stat,
1479         .fstat_fn = vfs_gluster_fstat,
1480         .lstat_fn = vfs_gluster_lstat,
1481         .get_alloc_size_fn = vfs_gluster_get_alloc_size,
1482         .unlink_fn = vfs_gluster_unlink,
1483
1484         .chmod_fn = vfs_gluster_chmod,
1485         .fchmod_fn = vfs_gluster_fchmod,
1486         .chown_fn = vfs_gluster_chown,
1487         .fchown_fn = vfs_gluster_fchown,
1488         .lchown_fn = vfs_gluster_lchown,
1489         .chdir_fn = vfs_gluster_chdir,
1490         .getwd_fn = vfs_gluster_getwd,
1491         .ntimes_fn = vfs_gluster_ntimes,
1492         .ftruncate_fn = vfs_gluster_ftruncate,
1493         .fallocate_fn = vfs_gluster_fallocate,
1494         .lock_fn = vfs_gluster_lock,
1495         .kernel_flock_fn = vfs_gluster_kernel_flock,
1496         .linux_setlease_fn = vfs_gluster_linux_setlease,
1497         .getlock_fn = vfs_gluster_getlock,
1498         .symlink_fn = vfs_gluster_symlink,
1499         .readlink_fn = vfs_gluster_readlink,
1500         .link_fn = vfs_gluster_link,
1501         .mknod_fn = vfs_gluster_mknod,
1502         .realpath_fn = vfs_gluster_realpath,
1503         .chflags_fn = vfs_gluster_chflags,
1504         .file_id_create_fn = NULL,
1505         .streaminfo_fn = NULL,
1506         .get_real_filename_fn = vfs_gluster_get_real_filename,
1507         .connectpath_fn = vfs_gluster_connectpath,
1508
1509         .brl_lock_windows_fn = NULL,
1510         .brl_unlock_windows_fn = NULL,
1511         .brl_cancel_windows_fn = NULL,
1512         .strict_lock_check_fn = NULL,
1513         .translate_name_fn = NULL,
1514         .fsctl_fn = NULL,
1515
1516         /* NT ACL Operations */
1517         .fget_nt_acl_fn = NULL,
1518         .get_nt_acl_fn = NULL,
1519         .fset_nt_acl_fn = NULL,
1520         .audit_file_fn = NULL,
1521
1522         /* Posix ACL Operations */
1523         .chmod_acl_fn = NULL,   /* passthrough to default */
1524         .fchmod_acl_fn = NULL,  /* passthrough to default */
1525         .sys_acl_get_file_fn = posixacl_xattr_acl_get_file,
1526         .sys_acl_get_fd_fn = posixacl_xattr_acl_get_fd,
1527         .sys_acl_blob_get_file_fn = posix_sys_acl_blob_get_file,
1528         .sys_acl_blob_get_fd_fn = posix_sys_acl_blob_get_fd,
1529         .sys_acl_set_file_fn = posixacl_xattr_acl_set_file,
1530         .sys_acl_set_fd_fn = posixacl_xattr_acl_set_fd,
1531         .sys_acl_delete_def_file_fn = posixacl_xattr_acl_delete_def_file,
1532
1533         /* EA Operations */
1534         .getxattr_fn = vfs_gluster_getxattr,
1535         .fgetxattr_fn = vfs_gluster_fgetxattr,
1536         .listxattr_fn = vfs_gluster_listxattr,
1537         .flistxattr_fn = vfs_gluster_flistxattr,
1538         .removexattr_fn = vfs_gluster_removexattr,
1539         .fremovexattr_fn = vfs_gluster_fremovexattr,
1540         .setxattr_fn = vfs_gluster_setxattr,
1541         .fsetxattr_fn = vfs_gluster_fsetxattr,
1542
1543         /* AIO Operations */
1544         .aio_force_fn = vfs_gluster_aio_force,
1545
1546         /* Durable handle Operations */
1547         .durable_cookie_fn = NULL,
1548         .durable_disconnect_fn = NULL,
1549         .durable_reconnect_fn = NULL,
1550 };
1551
1552 static_decl_vfs;
1553 NTSTATUS vfs_glusterfs_init(TALLOC_CTX *ctx)
1554 {
1555         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
1556                                 "glusterfs", &glusterfs_fns);
1557 }