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 #include "lib/pthreadpool/pthreadpool_tevent.h"
  49
  50 #define DEFAULT_VOLFILE_SERVER "localhost"
  51 #define GLUSTER_NAME_MAX 255
  52
  53 /**
  54  * Helper to convert struct stat to struct stat_ex.
  55  */
  56 static void smb_stat_ex_from_stat(struct stat_ex *dst, const struct stat *src)
  57 {
  58         ZERO_STRUCTP(dst);
  59
  60         dst->st_ex_dev = src->st_dev;
  61         dst->st_ex_ino = src->st_ino;
  62         dst->st_ex_mode = src->st_mode;
  63         dst->st_ex_nlink = src->st_nlink;
  64         dst->st_ex_uid = src->st_uid;
  65         dst->st_ex_gid = src->st_gid;
  66         dst->st_ex_rdev = src->st_rdev;
  67         dst->st_ex_size = src->st_size;
  68         dst->st_ex_atime.tv_sec = src->st_atime;
  69         dst->st_ex_mtime.tv_sec = src->st_mtime;
  70         dst->st_ex_ctime.tv_sec = src->st_ctime;
  71         dst->st_ex_btime.tv_sec = src->st_mtime;
  72         dst->st_ex_blksize = src->st_blksize;
  73         dst->st_ex_blocks = src->st_blocks;
  74         dst->st_ex_file_id = dst->st_ex_ino;
  75         dst->st_ex_iflags |= ST_EX_IFLAG_CALCULATED_FILE_ID;
  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         dst->st_ex_itime = dst->st_ex_btime;
  83         dst->st_ex_iflags |= ST_EX_IFLAG_CALCULATED_ITIME;
  84 }
  85
  86 /* pre-opened glfs_t */
  87
  88 static struct glfs_preopened {
  89         char *volume;
  90         char *connectpath;
  91         glfs_t *fs;
  92         int ref;
  93         struct glfs_preopened *next, *prev;
  94 } *glfs_preopened;
  95
  96
  97 static int glfs_set_preopened(const char *volume, const char *connectpath, glfs_t *fs)
  98 {
  99         struct glfs_preopened *entry = NULL;
 100
 101         entry = talloc_zero(NULL, struct glfs_preopened);
 102         if (!entry) {
 103                 errno = ENOMEM;
 104                 return -1;
 105         }
 106
 107         entry->volume = talloc_strdup(entry, volume);
 108         if (!entry->volume) {
 109                 talloc_free(entry);
 110                 errno = ENOMEM;
 111                 return -1;
 112         }
 113
 114         entry->connectpath = talloc_strdup(entry, connectpath);
 115         if (entry->connectpath == NULL) {
 116                 talloc_free(entry);
 117                 errno = ENOMEM;
 118                 return -1;
 119         }
 120
 121         entry->fs = fs;
 122         entry->ref = 1;
 123
 124         DLIST_ADD(glfs_preopened, entry);
 125
 126         return 0;
 127 }
 128
 129 static glfs_t *glfs_find_preopened(const char *volume, const char *connectpath)
 130 {
 131         struct glfs_preopened *entry = NULL;
 132
 133         for (entry = glfs_preopened; entry; entry = entry->next) {
 134                 if (strcmp(entry->volume, volume) == 0 &&
 135                     strcmp(entry->connectpath, connectpath) == 0)
 136                 {
 137                         entry->ref++;
 138                         return entry->fs;
 139                 }
 140         }
 141
 142         return NULL;
 143 }
 144
 145 static void glfs_clear_preopened(glfs_t *fs)
 146 {
 147         struct glfs_preopened *entry = NULL;
 148
 149         for (entry = glfs_preopened; entry; entry = entry->next) {
 150                 if (entry->fs == fs) {
 151                         if (--entry->ref)
 152                                 return;
 153
 154                         DLIST_REMOVE(glfs_preopened, entry);
 155
 156                         glfs_fini(entry->fs);
 157                         talloc_free(entry);
 158                 }
 159         }
 160 }
 161
 162 static int vfs_gluster_set_volfile_servers(glfs_t *fs,
 163                                            const char *volfile_servers)
 164 {
 165         char *server = NULL;
 166         size_t server_count = 0;
 167         size_t server_success = 0;
 168         int   ret = -1;
 169         TALLOC_CTX *frame = talloc_stackframe();
 170
 171         DBG_INFO("servers list %s\n", volfile_servers);
 172
 173         while (next_token_talloc(frame, &volfile_servers, &server, " \t")) {
 174                 char *transport = NULL;
 175                 char *host = NULL;
 176                 int   port = 0;
 177
 178                 server_count++;
 179                 DBG_INFO("server %zu %s\n", server_count, server);
 180
 181                 /* Determine the transport type */
 182                 if (strncmp(server, "unix+", 5) == 0) {
 183                         port = 0;
 184                         transport = talloc_strdup(frame, "unix");
 185                         if (!transport) {
 186                                 errno = ENOMEM;
 187                                 goto out;
 188                         }
 189                         host = talloc_strdup(frame, server + 5);
 190                         if (!host) {
 191                                 errno = ENOMEM;
 192                                 goto out;
 193                         }
 194                 } else {
 195                         char *p = NULL;
 196                         char *port_index = NULL;
 197
 198                         if (strncmp(server, "tcp+", 4) == 0) {
 199                                 server += 4;
 200                         }
 201
 202                         /* IPv6 is enclosed in []
 203                          * ':' before ']' is part of IPv6
 204                          * ':' after  ']' indicates port
 205                          */
 206                         p = server;
 207                         if (server[0] == '[') {
 208                                 server++;
 209                                 p = index(server, ']');
 210                                 if (p == NULL) {
 211                                         /* Malformed IPv6 */
 212                                         continue;
 213                                 }
 214                                 p[0] = '\0';
 215                                 p++;
 216                         }
 217
 218                         port_index = index(p, ':');
 219
 220                         if (port_index == NULL) {
 221                                 port = 0;
 222                         } else {
 223                                 port = atoi(port_index + 1);
 224                                 port_index[0] = '\0';
 225                         }
 226                         transport = talloc_strdup(frame, "tcp");
 227                         if (!transport) {
 228                                 errno = ENOMEM;
 229                                 goto out;
 230                         }
 231                         host = talloc_strdup(frame, server);
 232                         if (!host) {
 233                                 errno = ENOMEM;
 234                                 goto out;
 235                         }
 236                 }
 237
 238                 DBG_INFO("Calling set volfile server with params "
 239                          "transport=%s, host=%s, port=%d\n", transport,
 240                           host, port);
 241
 242                 ret = glfs_set_volfile_server(fs, transport, host, port);
 243                 if (ret < 0) {
 244                         DBG_WARNING("Failed to set volfile_server "
 245                                     "transport=%s, host=%s, port=%d (%s)\n",
 246                                     transport, host, port, strerror(errno));
 247                 } else {
 248                         server_success++;
 249                 }
 250         }
 251
 252 out:
 253         if (server_count == 0) {
 254                 ret = -1;
 255         } else if (server_success < server_count) {
 256                 DBG_WARNING("Failed to set %zu out of %zu servers parsed\n",
 257                             server_count - server_success, server_count);
 258                 ret = 0;
 259         }
 260
 261         TALLOC_FREE(frame);
 262         return ret;
 263 }
 264
 265 /* Disk Operations */
 266
 267 static int vfs_gluster_connect(struct vfs_handle_struct *handle,
 268                                const char *service,
 269                                const char *user)
 270 {
 271         const struct loadparm_substitution *lp_sub =
 272                 loadparm_s3_global_substitution();
 273         const char *volfile_servers;
 274         const char *volume;
 275         char *logfile;
 276         int loglevel;
 277         glfs_t *fs = NULL;
 278         TALLOC_CTX *tmp_ctx;
 279         int ret = 0;
 280
 281         tmp_ctx = talloc_new(NULL);
 282         if (tmp_ctx == NULL) {
 283                 ret = -1;
 284                 goto done;
 285         }
 286         logfile = lp_parm_substituted_string(tmp_ctx,
 287                                              lp_sub,
 288                                              SNUM(handle->conn),
 289                                              "glusterfs",
 290                                              "logfile",
 291                                              NULL);
 292
 293         loglevel = lp_parm_int(SNUM(handle->conn), "glusterfs", "loglevel", -1);
 294
 295         volfile_servers = lp_parm_substituted_string(tmp_ctx,
 296                                                      lp_sub,
 297                                                      SNUM(handle->conn),
 298                                                      "glusterfs",
 299                                                      "volfile_server",
 300                                                      NULL);
 301         if (volfile_servers == NULL) {
 302                 volfile_servers = DEFAULT_VOLFILE_SERVER;
 303         }
 304
 305         volume = lp_parm_const_string(SNUM(handle->conn), "glusterfs", "volume",
 306                                       NULL);
 307         if (volume == NULL) {
 308                 volume = service;
 309         }
 310
 311         fs = glfs_find_preopened(volume, handle->conn->connectpath);
 312         if (fs) {
 313                 goto done;
 314         }
 315
 316         fs = glfs_new(volume);
 317         if (fs == NULL) {
 318                 ret = -1;
 319                 goto done;
 320         }
 321
 322         ret = vfs_gluster_set_volfile_servers(fs, volfile_servers);
 323         if (ret < 0) {
 324                 DBG_ERR("Failed to set volfile_servers from list %s\n",
 325                         volfile_servers);
 326                 goto done;
 327         }
 328
 329         ret = glfs_set_xlator_option(fs, "*-md-cache", "cache-posix-acl",
 330                                      "true");
 331         if (ret < 0) {
 332                 DEBUG(0, ("%s: Failed to set xlator options\n", volume));
 333                 goto done;
 334         }
 335
 336
 337         ret = glfs_set_xlator_option(fs, "*-snapview-client",
 338                                      "snapdir-entry-path",
 339                                      handle->conn->connectpath);
 340         if (ret < 0) {
 341                 DEBUG(0, ("%s: Failed to set xlator option:"
 342                           " snapdir-entry-path\n", volume));
 343                 goto done;
 344         }
 345
 346         ret = glfs_set_logging(fs, logfile, loglevel);
 347         if (ret < 0) {
 348                 DEBUG(0, ("%s: Failed to set logfile %s loglevel %d\n",
 349                           volume, logfile, loglevel));
 350                 goto done;
 351         }
 352
 353         ret = glfs_init(fs);
 354         if (ret < 0) {
 355                 DEBUG(0, ("%s: Failed to initialize volume (%s)\n",
 356                           volume, strerror(errno)));
 357                 goto done;
 358         }
 359
 360         ret = glfs_set_preopened(volume, handle->conn->connectpath, fs);
 361         if (ret < 0) {
 362                 DEBUG(0, ("%s: Failed to register volume (%s)\n",
 363                           volume, strerror(errno)));
 364                 goto done;
 365         }
 366
 367         /*
 368          * The shadow_copy2 module will fail to export subdirectories
 369          * of a gluster volume unless we specify the mount point,
 370          * because the detection fails if the file system is not
 371          * locally mounted:
 372          * https://bugzilla.samba.org/show_bug.cgi?id=13091
 373          */
 374         lp_do_parameter(SNUM(handle->conn), "shadow:mountpoint", "/");
 375
 376         /*
 377          * Unless we have an async implementation of getxattrat turn this off.
 378          */
 379         lp_do_parameter(SNUM(handle->conn), "smbd async dosmode", "false");
 380
 381 done:
 382         if (ret < 0) {
 383                 if (fs)
 384                         glfs_fini(fs);
 385         } else {
 386                 DBG_ERR("%s: Initialized volume from servers %s\n",
 387                         volume, volfile_servers);
 388                 handle->data = fs;
 389         }
 390         talloc_free(tmp_ctx);
 391         return ret;
 392 }
 393
 394 static void vfs_gluster_disconnect(struct vfs_handle_struct *handle)
 395 {
 396         glfs_t *fs = NULL;
 397
 398         fs = handle->data;
 399
 400         glfs_clear_preopened(fs);
 401 }
 402
 403 static uint64_t vfs_gluster_disk_free(struct vfs_handle_struct *handle,
 404                                 const struct smb_filename *smb_fname,
 405                                 uint64_t *bsize_p,
 406                                 uint64_t *dfree_p,
 407                                 uint64_t *dsize_p)
 408 {
 409         struct statvfs statvfs = { 0, };
 410         int ret;
 411
 412         ret = glfs_statvfs(handle->data, smb_fname->base_name, &statvfs);
 413         if (ret < 0) {
 414                 return -1;
 415         }
 416
 417         if (bsize_p != NULL) {
 418                 *bsize_p = (uint64_t)statvfs.f_bsize; /* Block size */
 419         }
 420         if (dfree_p != NULL) {
 421                 *dfree_p = (uint64_t)statvfs.f_bavail; /* Available Block units */
 422         }
 423         if (dsize_p != NULL) {
 424                 *dsize_p = (uint64_t)statvfs.f_blocks; /* Total Block units */
 425         }
 426
 427         return (uint64_t)statvfs.f_bavail;
 428 }
 429
 430 static int vfs_gluster_get_quota(struct vfs_handle_struct *handle,
 431                                 const struct smb_filename *smb_fname,
 432                                 enum SMB_QUOTA_TYPE qtype,
 433                                 unid_t id,
 434                                 SMB_DISK_QUOTA *qt)
 435 {
 436         errno = ENOSYS;
 437         return -1;
 438 }
 439
 440 static int
 441 vfs_gluster_set_quota(struct vfs_handle_struct *handle,
 442                       enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt)
 443 {
 444         errno = ENOSYS;
 445         return -1;
 446 }
 447
 448 static int vfs_gluster_statvfs(struct vfs_handle_struct *handle,
 449                                 const struct smb_filename *smb_fname,
 450                                 struct vfs_statvfs_struct *vfs_statvfs)
 451 {
 452         struct statvfs statvfs = { 0, };
 453         int ret;
 454
 455         ret = glfs_statvfs(handle->data, smb_fname->base_name, &statvfs);
 456         if (ret < 0) {
 457                 DEBUG(0, ("glfs_statvfs(%s) failed: %s\n",
 458                           smb_fname->base_name, strerror(errno)));
 459                 return -1;
 460         }
 461
 462         ZERO_STRUCTP(vfs_statvfs);
 463
 464         vfs_statvfs->OptimalTransferSize = statvfs.f_frsize;
 465         vfs_statvfs->BlockSize = statvfs.f_bsize;
 466         vfs_statvfs->TotalBlocks = statvfs.f_blocks;
 467         vfs_statvfs->BlocksAvail = statvfs.f_bfree;
 468         vfs_statvfs->UserBlocksAvail = statvfs.f_bavail;
 469         vfs_statvfs->TotalFileNodes = statvfs.f_files;
 470         vfs_statvfs->FreeFileNodes = statvfs.f_ffree;
 471         vfs_statvfs->FsIdentifier = statvfs.f_fsid;
 472         vfs_statvfs->FsCapabilities =
 473             FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
 474
 475         return ret;
 476 }
 477
 478 static uint32_t vfs_gluster_fs_capabilities(struct vfs_handle_struct *handle,
 479                                             enum timestamp_set_resolution *p_ts_res)
 480 {
 481         uint32_t caps = FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
 482
 483 #ifdef HAVE_GFAPI_VER_6
 484         caps |= FILE_SUPPORTS_SPARSE_FILES;
 485 #endif
 486
 487 #ifdef STAT_HAVE_NSEC
 488         *p_ts_res = TIMESTAMP_SET_NT_OR_BETTER;
 489 #endif
 490
 491         return caps;
 492 }
 493
 494 static DIR *vfs_gluster_opendir(struct vfs_handle_struct *handle,
 495                                 const struct smb_filename *smb_fname,
 496                                 const char *mask,
 497                                 uint32_t attributes)
 498 {
 499         glfs_fd_t *fd;
 500
 501         START_PROFILE(syscall_opendir);
 502
 503         fd = glfs_opendir(handle->data, smb_fname->base_name);
 504         if (fd == NULL) {
 505                 DEBUG(0, ("glfs_opendir(%s) failed: %s\n",
 506                           smb_fname->base_name, strerror(errno)));
 507         }
 508
 509         END_PROFILE(syscall_opendir);
 510
 511         return (DIR *) fd;
 512 }
 513
 514 static glfs_fd_t *vfs_gluster_fetch_glfd(struct vfs_handle_struct *handle,
 515                                          files_struct *fsp)
 516 {
 517         glfs_fd_t **glfd = (glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp);
 518         if (glfd == NULL) {
 519                 DBG_INFO("Failed to fetch fsp extension\n");
 520                 return NULL;
 521         }
 522         if (*glfd == NULL) {
 523                 DBG_INFO("Empty glfs_fd_t pointer\n");
 524                 return NULL;
 525         }
 526
 527         return *glfd;
 528 }
 529
 530 static DIR *vfs_gluster_fdopendir(struct vfs_handle_struct *handle,
 531                                   files_struct *fsp, const char *mask,
 532                                   uint32_t attributes)
 533 {
 534         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
 535         if (glfd == NULL) {
 536                 DBG_ERR("Failed to fetch gluster fd\n");
 537                 return NULL;
 538         }
 539
 540         return (DIR *)glfd;
 541 }
 542
 543 static int vfs_gluster_closedir(struct vfs_handle_struct *handle, DIR *dirp)
 544 {
 545         int ret;
 546
 547         START_PROFILE(syscall_closedir);
 548         ret = glfs_closedir((void *)dirp);
 549         END_PROFILE(syscall_closedir);
 550
 551         return ret;
 552 }
 553
 554 static struct dirent *vfs_gluster_readdir(struct vfs_handle_struct *handle,
 555                                           DIR *dirp, SMB_STRUCT_STAT *sbuf)
 556 {
 557         static char direntbuf[512];
 558         int ret;
 559         struct stat stat;
 560         struct dirent *dirent = 0;
 561
 562         START_PROFILE(syscall_readdir);
 563         if (sbuf != NULL) {
 564                 ret = glfs_readdirplus_r((void *)dirp, &stat, (void *)direntbuf,
 565                                          &dirent);
 566         } else {
 567                 ret = glfs_readdir_r((void *)dirp, (void *)direntbuf, &dirent);
 568         }
 569
 570         if ((ret < 0) || (dirent == NULL)) {
 571                 END_PROFILE(syscall_readdir);
 572                 return NULL;
 573         }
 574
 575         if (sbuf != NULL) {
 576                 SET_STAT_INVALID(*sbuf);
 577                 if (!S_ISLNK(stat.st_mode)) {
 578                         smb_stat_ex_from_stat(sbuf, &stat);
 579                 }
 580         }
 581
 582         END_PROFILE(syscall_readdir);
 583         return dirent;
 584 }
 585
 586 static long vfs_gluster_telldir(struct vfs_handle_struct *handle, DIR *dirp)
 587 {
 588         long ret;
 589
 590         START_PROFILE(syscall_telldir);
 591         ret = glfs_telldir((void *)dirp);
 592         END_PROFILE(syscall_telldir);
 593
 594         return ret;
 595 }
 596
 597 static void vfs_gluster_seekdir(struct vfs_handle_struct *handle, DIR *dirp,
 598                                 long offset)
 599 {
 600         START_PROFILE(syscall_seekdir);
 601         glfs_seekdir((void *)dirp, offset);
 602         END_PROFILE(syscall_seekdir);
 603 }
 604
 605 static void vfs_gluster_rewinddir(struct vfs_handle_struct *handle, DIR *dirp)
 606 {
 607         START_PROFILE(syscall_rewinddir);
 608         glfs_seekdir((void *)dirp, 0);
 609         END_PROFILE(syscall_rewinddir);
 610 }
 611
 612 static int vfs_gluster_mkdirat(struct vfs_handle_struct *handle,
 613                         struct files_struct *dirfsp,
 614                         const struct smb_filename *smb_fname,
 615                         mode_t mode)
 616 {
 617         int ret;
 618
 619         START_PROFILE(syscall_mkdirat);
 620         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
 621         ret = glfs_mkdir(handle->data, smb_fname->base_name, mode);
 622         END_PROFILE(syscall_mkdirat);
 623
 624         return ret;
 625 }
 626
 627 static int vfs_gluster_open(struct vfs_handle_struct *handle,
 628                             struct smb_filename *smb_fname, files_struct *fsp,
 629                             int flags, mode_t mode)
 630 {
 631         glfs_fd_t *glfd;
 632         glfs_fd_t **p_tmp;
 633
 634         START_PROFILE(syscall_open);
 635
 636         p_tmp = VFS_ADD_FSP_EXTENSION(handle, fsp, glfs_fd_t *, NULL);
 637         if (p_tmp == NULL) {
 638                 END_PROFILE(syscall_open);
 639                 errno = ENOMEM;
 640                 return -1;
 641         }
 642
 643         if (flags & O_DIRECTORY) {
 644                 glfd = glfs_opendir(handle->data, smb_fname->base_name);
 645         } else if (flags & O_CREAT) {
 646                 glfd = glfs_creat(handle->data, smb_fname->base_name, flags,
 647                                   mode);
 648         } else {
 649                 glfd = glfs_open(handle->data, smb_fname->base_name, flags);
 650         }
 651
 652         if (glfd == NULL) {
 653                 END_PROFILE(syscall_open);
 654                 /* no extension destroy_fn, so no need to save errno */
 655                 VFS_REMOVE_FSP_EXTENSION(handle, fsp);
 656                 return -1;
 657         }
 658
 659         *p_tmp = glfd;
 660
 661         END_PROFILE(syscall_open);
 662         /* An arbitrary value for error reporting, so you know its us. */
 663         return 13371337;
 664 }
 665
 666 static int vfs_gluster_close(struct vfs_handle_struct *handle,
 667                              files_struct *fsp)
 668 {
 669         int ret;
 670         glfs_fd_t *glfd = NULL;
 671
 672         START_PROFILE(syscall_close);
 673
 674         glfd = vfs_gluster_fetch_glfd(handle, fsp);
 675         if (glfd == NULL) {
 676                 END_PROFILE(syscall_close);
 677                 DBG_ERR("Failed to fetch gluster fd\n");
 678                 return -1;
 679         }
 680
 681         VFS_REMOVE_FSP_EXTENSION(handle, fsp);
 682
 683         ret = glfs_close(glfd);
 684         END_PROFILE(syscall_close);
 685
 686         return ret;
 687 }
 688
 689 static ssize_t vfs_gluster_pread(struct vfs_handle_struct *handle,
 690                                  files_struct *fsp, void *data, size_t n,
 691                                  off_t offset)
 692 {
 693         ssize_t ret;
 694         glfs_fd_t *glfd = NULL;
 695
 696         START_PROFILE_BYTES(syscall_pread, n);
 697
 698         glfd = vfs_gluster_fetch_glfd(handle, fsp);
 699         if (glfd == NULL) {
 700                 END_PROFILE_BYTES(syscall_pread);
 701                 DBG_ERR("Failed to fetch gluster fd\n");
 702                 return -1;
 703         }
 704
 705 #ifdef HAVE_GFAPI_VER_7_6
 706         ret = glfs_pread(glfd, data, n, offset, 0, NULL);
 707 #else
 708         ret = glfs_pread(glfd, data, n, offset, 0);
 709 #endif
 710         END_PROFILE_BYTES(syscall_pread);
 711
 712         return ret;
 713 }
 714
 715 struct vfs_gluster_pread_state {
 716         struct tevent_req *req;
 717         ssize_t ret;
 718         glfs_fd_t *fd;
 719         void *buf;
 720         size_t count;
 721         off_t offset;
 722
 723         struct vfs_aio_state vfs_aio_state;
 724         SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
 725 };
 726
 727 static void vfs_gluster_pread_do(void *private_data);
 728 static void vfs_gluster_pread_done(struct tevent_req *subreq);
 729 static int vfs_gluster_pread_state_destructor(struct vfs_gluster_pread_state *state);
 730
 731 static struct tevent_req *vfs_gluster_pread_send(struct vfs_handle_struct
 732                                                   *handle, TALLOC_CTX *mem_ctx,
 733                                                   struct tevent_context *ev,
 734                                                   files_struct *fsp,
 735                                                   void *data, size_t n,
 736                                                   off_t offset)
 737 {
 738         struct vfs_gluster_pread_state *state;
 739         struct tevent_req *req, *subreq;
 740
 741         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
 742         if (glfd == NULL) {
 743                 DBG_ERR("Failed to fetch gluster fd\n");
 744                 return NULL;
 745         }
 746
 747         req = tevent_req_create(mem_ctx, &state, struct vfs_gluster_pread_state);
 748         if (req == NULL) {
 749                 return NULL;
 750         }
 751
 752         state->req = req;
 753         state->ret = -1;
 754         state->fd = glfd;
 755         state->buf = data;
 756         state->count = n;
 757         state->offset = offset;
 758
 759         SMBPROFILE_BYTES_ASYNC_START(syscall_asys_pread, profile_p,
 760                                      state->profile_bytes, n);
 761         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
 762
 763         subreq = pthreadpool_tevent_job_send(
 764                 state, ev, handle->conn->sconn->pool,
 765                 vfs_gluster_pread_do, state);
 766         if (tevent_req_nomem(subreq, req)) {
 767                 return tevent_req_post(req, ev);
 768         }
 769         tevent_req_set_callback(subreq, vfs_gluster_pread_done, state);
 770
 771         talloc_set_destructor(state, vfs_gluster_pread_state_destructor);
 772
 773         return req;
 774 }
 775
 776 static void vfs_gluster_pread_do(void *private_data)
 777 {
 778         struct vfs_gluster_pread_state *state = talloc_get_type_abort(
 779                 private_data, struct vfs_gluster_pread_state);
 780         struct timespec start_time;
 781         struct timespec end_time;
 782
 783         SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
 784
 785         PROFILE_TIMESTAMP(&start_time);
 786
 787         do {
 788 #ifdef HAVE_GFAPI_VER_7_6
 789                 state->ret = glfs_pread(state->fd, state->buf, state->count,
 790                                         state->offset, 0, NULL);
 791 #else
 792                 state->ret = glfs_pread(state->fd, state->buf, state->count,
 793                                         state->offset, 0);
 794 #endif
 795         } while ((state->ret == -1) && (errno == EINTR));
 796
 797         if (state->ret == -1) {
 798                 state->vfs_aio_state.error = errno;
 799         }
 800
 801         PROFILE_TIMESTAMP(&end_time);
 802
 803         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
 804
 805         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
 806 }
 807
 808 static int vfs_gluster_pread_state_destructor(struct vfs_gluster_pread_state *state)
 809 {
 810         /*
 811          * This destructor only gets called if the request is still
 812          * in flight, which is why we deny it by returning -1. We
 813          * also set the req pointer to NULL so the _done function
 814          * can detect the caller doesn't want the result anymore.
 815          *
 816          * Forcing the fsp closed by a SHUTDOWN_CLOSE can cause this.
 817          */
 818         state->req = NULL;
 819         return -1;
 820 }
 821
 822 static void vfs_gluster_pread_done(struct tevent_req *subreq)
 823 {
 824         struct vfs_gluster_pread_state *state = tevent_req_callback_data(
 825                 subreq, struct vfs_gluster_pread_state);
 826         struct tevent_req *req = state->req;
 827         int ret;
 828
 829         ret = pthreadpool_tevent_job_recv(subreq);
 830         TALLOC_FREE(subreq);
 831         SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
 832         talloc_set_destructor(state, NULL);
 833         if (req == NULL) {
 834                 /*
 835                  * We were shutdown closed in flight. No one
 836                  * wants the result, and state has been reparented
 837                  * to the NULL context, so just free it so we
 838                  * don't leak memory.
 839                  */
 840                 DBG_NOTICE("gluster pread request abandoned in flight\n");
 841                 TALLOC_FREE(state);
 842                 return;
 843         }
 844         if (ret != 0) {
 845                 if (ret != EAGAIN) {
 846                         tevent_req_error(req, ret);
 847                         return;
 848                 }
 849                 /*
 850                  * If we get EAGAIN from pthreadpool_tevent_job_recv() this
 851                  * means the lower level pthreadpool failed to create a new
 852                  * thread. Fallback to sync processing in that case to allow
 853                  * some progress for the client.
 854                  */
 855                 vfs_gluster_pread_do(state);
 856         }
 857
 858         tevent_req_done(req);
 859 }
 860
 861 static ssize_t vfs_gluster_pread_recv(struct tevent_req *req,
 862                                       struct vfs_aio_state *vfs_aio_state)
 863 {
 864         struct vfs_gluster_pread_state *state = tevent_req_data(
 865                 req, struct vfs_gluster_pread_state);
 866
 867         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
 868                 return -1;
 869         }
 870
 871         *vfs_aio_state = state->vfs_aio_state;
 872         return state->ret;
 873 }
 874
 875 struct vfs_gluster_pwrite_state {
 876         struct tevent_req *req;
 877         ssize_t ret;
 878         glfs_fd_t *fd;
 879         const void *buf;
 880         size_t count;
 881         off_t offset;
 882
 883         struct vfs_aio_state vfs_aio_state;
 884         SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
 885 };
 886
 887 static void vfs_gluster_pwrite_do(void *private_data);
 888 static void vfs_gluster_pwrite_done(struct tevent_req *subreq);
 889 static int vfs_gluster_pwrite_state_destructor(struct vfs_gluster_pwrite_state *state);
 890
 891 static struct tevent_req *vfs_gluster_pwrite_send(struct vfs_handle_struct
 892                                                   *handle, TALLOC_CTX *mem_ctx,
 893                                                   struct tevent_context *ev,
 894                                                   files_struct *fsp,
 895                                                   const void *data, size_t n,
 896                                                   off_t offset)
 897 {
 898         struct tevent_req *req, *subreq;
 899         struct vfs_gluster_pwrite_state *state;
 900
 901         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
 902         if (glfd == NULL) {
 903                 DBG_ERR("Failed to fetch gluster fd\n");
 904                 return NULL;
 905         }
 906
 907         req = tevent_req_create(mem_ctx, &state, struct vfs_gluster_pwrite_state);
 908         if (req == NULL) {
 909                 return NULL;
 910         }
 911
 912         state->req = req;
 913         state->ret = -1;
 914         state->fd = glfd;
 915         state->buf = data;
 916         state->count = n;
 917         state->offset = offset;
 918
 919         SMBPROFILE_BYTES_ASYNC_START(syscall_asys_pwrite, profile_p,
 920                                      state->profile_bytes, n);
 921         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
 922
 923         subreq = pthreadpool_tevent_job_send(
 924                 state, ev, handle->conn->sconn->pool,
 925                 vfs_gluster_pwrite_do, state);
 926         if (tevent_req_nomem(subreq, req)) {
 927                 return tevent_req_post(req, ev);
 928         }
 929         tevent_req_set_callback(subreq, vfs_gluster_pwrite_done, state);
 930
 931         talloc_set_destructor(state, vfs_gluster_pwrite_state_destructor);
 932
 933         return req;
 934 }
 935
 936 static void vfs_gluster_pwrite_do(void *private_data)
 937 {
 938         struct vfs_gluster_pwrite_state *state = talloc_get_type_abort(
 939                 private_data, struct vfs_gluster_pwrite_state);
 940         struct timespec start_time;
 941         struct timespec end_time;
 942
 943         SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
 944
 945         PROFILE_TIMESTAMP(&start_time);
 946
 947         do {
 948 #ifdef HAVE_GFAPI_VER_7_6
 949                 state->ret = glfs_pwrite(state->fd, state->buf, state->count,
 950                                          state->offset, 0, NULL, NULL);
 951 #else
 952                 state->ret = glfs_pwrite(state->fd, state->buf, state->count,
 953                                          state->offset, 0);
 954 #endif
 955         } while ((state->ret == -1) && (errno == EINTR));
 956
 957         if (state->ret == -1) {
 958                 state->vfs_aio_state.error = errno;
 959         }
 960
 961         PROFILE_TIMESTAMP(&end_time);
 962
 963         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
 964
 965         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
 966 }
 967
 968 static int vfs_gluster_pwrite_state_destructor(struct vfs_gluster_pwrite_state *state)
 969 {
 970         return -1;
 971 }
 972
 973 static void vfs_gluster_pwrite_done(struct tevent_req *subreq)
 974 {
 975         struct vfs_gluster_pwrite_state *state = tevent_req_callback_data(
 976                 subreq, struct vfs_gluster_pwrite_state);
 977         struct tevent_req *req = state->req;
 978         int ret;
 979
 980         ret = pthreadpool_tevent_job_recv(subreq);
 981         TALLOC_FREE(subreq);
 982         SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
 983         talloc_set_destructor(state, NULL);
 984         if (ret != 0) {
 985                 if (ret != EAGAIN) {
 986                         tevent_req_error(req, ret);
 987                         return;
 988                 }
 989                 /*
 990                  * If we get EAGAIN from pthreadpool_tevent_job_recv() this
 991                  * means the lower level pthreadpool failed to create a new
 992                  * thread. Fallback to sync processing in that case to allow
 993                  * some progress for the client.
 994                  */
 995                 vfs_gluster_pwrite_do(state);
 996         }
 997
 998         tevent_req_done(req);
 999 }
1000
1001 static ssize_t vfs_gluster_pwrite_recv(struct tevent_req *req,
1002                                        struct vfs_aio_state *vfs_aio_state)
1003 {
1004         struct vfs_gluster_pwrite_state *state = tevent_req_data(
1005                 req, struct vfs_gluster_pwrite_state);
1006
1007         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1008                 return -1;
1009         }
1010
1011         *vfs_aio_state = state->vfs_aio_state;
1012
1013         return state->ret;
1014 }
1015
1016 static ssize_t vfs_gluster_pwrite(struct vfs_handle_struct *handle,
1017                                   files_struct *fsp, const void *data,
1018                                   size_t n, off_t offset)
1019 {
1020         ssize_t ret;
1021         glfs_fd_t *glfd = NULL;
1022
1023         START_PROFILE_BYTES(syscall_pwrite, n);
1024
1025         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1026         if (glfd == NULL) {
1027                 END_PROFILE_BYTES(syscall_pwrite);
1028                 DBG_ERR("Failed to fetch gluster fd\n");
1029                 return -1;
1030         }
1031
1032 #ifdef HAVE_GFAPI_VER_7_6
1033         ret = glfs_pwrite(glfd, data, n, offset, 0, NULL, NULL);
1034 #else
1035         ret = glfs_pwrite(glfd, data, n, offset, 0);
1036 #endif
1037         END_PROFILE_BYTES(syscall_pwrite);
1038
1039         return ret;
1040 }
1041
1042 static off_t vfs_gluster_lseek(struct vfs_handle_struct *handle,
1043                                files_struct *fsp, off_t offset, int whence)
1044 {
1045         off_t ret = 0;
1046         glfs_fd_t *glfd = NULL;
1047
1048         START_PROFILE(syscall_lseek);
1049
1050         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1051         if (glfd == NULL) {
1052                 END_PROFILE(syscall_lseek);
1053                 DBG_ERR("Failed to fetch gluster fd\n");
1054                 return -1;
1055         }
1056
1057         ret = glfs_lseek(glfd, offset, whence);
1058         END_PROFILE(syscall_lseek);
1059
1060         return ret;
1061 }
1062
1063 static ssize_t vfs_gluster_sendfile(struct vfs_handle_struct *handle, int tofd,
1064                                     files_struct *fromfsp,
1065                                     const DATA_BLOB *hdr,
1066                                     off_t offset, size_t n)
1067 {
1068         errno = ENOTSUP;
1069         return -1;
1070 }
1071
1072 static ssize_t vfs_gluster_recvfile(struct vfs_handle_struct *handle,
1073                                     int fromfd, files_struct *tofsp,
1074                                     off_t offset, size_t n)
1075 {
1076         errno = ENOTSUP;
1077         return -1;
1078 }
1079
1080 static int vfs_gluster_renameat(struct vfs_handle_struct *handle,
1081                         files_struct *srcfsp,
1082                         const struct smb_filename *smb_fname_src,
1083                         files_struct *dstfsp,
1084                         const struct smb_filename *smb_fname_dst)
1085 {
1086         int ret;
1087
1088         START_PROFILE(syscall_renameat);
1089         ret = glfs_rename(handle->data, smb_fname_src->base_name,
1090                           smb_fname_dst->base_name);
1091         END_PROFILE(syscall_renameat);
1092
1093         return ret;
1094 }
1095
1096 struct vfs_gluster_fsync_state {
1097         ssize_t ret;
1098         glfs_fd_t *fd;
1099
1100         struct vfs_aio_state vfs_aio_state;
1101         SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
1102 };
1103
1104 static void vfs_gluster_fsync_do(void *private_data);
1105 static void vfs_gluster_fsync_done(struct tevent_req *subreq);
1106 static int vfs_gluster_fsync_state_destructor(struct vfs_gluster_fsync_state *state);
1107
1108 static struct tevent_req *vfs_gluster_fsync_send(struct vfs_handle_struct
1109                                                  *handle, TALLOC_CTX *mem_ctx,
1110                                                  struct tevent_context *ev,
1111                                                  files_struct *fsp)
1112 {
1113         struct tevent_req *req, *subreq;
1114         struct vfs_gluster_fsync_state *state;
1115
1116         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1117         if (glfd == NULL) {
1118                 DBG_ERR("Failed to fetch gluster fd\n");
1119                 return NULL;
1120         }
1121
1122         req = tevent_req_create(mem_ctx, &state, struct vfs_gluster_fsync_state);
1123         if (req == NULL) {
1124                 return NULL;
1125         }
1126
1127         state->ret = -1;
1128         state->fd = glfd;
1129
1130         SMBPROFILE_BYTES_ASYNC_START(syscall_asys_fsync, profile_p,
1131                                      state->profile_bytes, 0);
1132         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
1133
1134         subreq = pthreadpool_tevent_job_send(
1135                 state, ev, handle->conn->sconn->pool, vfs_gluster_fsync_do, state);
1136         if (tevent_req_nomem(subreq, req)) {
1137                 return tevent_req_post(req, ev);
1138         }
1139         tevent_req_set_callback(subreq, vfs_gluster_fsync_done, req);
1140
1141         talloc_set_destructor(state, vfs_gluster_fsync_state_destructor);
1142
1143         return req;
1144 }
1145
1146 static void vfs_gluster_fsync_do(void *private_data)
1147 {
1148         struct vfs_gluster_fsync_state *state = talloc_get_type_abort(
1149                 private_data, struct vfs_gluster_fsync_state);
1150         struct timespec start_time;
1151         struct timespec end_time;
1152
1153         SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
1154
1155         PROFILE_TIMESTAMP(&start_time);
1156
1157         do {
1158 #ifdef HAVE_GFAPI_VER_7_6
1159                 state->ret = glfs_fsync(state->fd, NULL, NULL);
1160 #else
1161                 state->ret = glfs_fsync(state->fd);
1162 #endif
1163         } while ((state->ret == -1) && (errno == EINTR));
1164
1165         if (state->ret == -1) {
1166                 state->vfs_aio_state.error = errno;
1167         }
1168
1169         PROFILE_TIMESTAMP(&end_time);
1170
1171         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
1172
1173         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
1174 }
1175
1176 static int vfs_gluster_fsync_state_destructor(struct vfs_gluster_fsync_state *state)
1177 {
1178         return -1;
1179 }
1180
1181 static void vfs_gluster_fsync_done(struct tevent_req *subreq)
1182 {
1183         struct tevent_req *req = tevent_req_callback_data(
1184                 subreq, struct tevent_req);
1185         struct vfs_gluster_fsync_state *state = tevent_req_data(
1186                 req, struct vfs_gluster_fsync_state);
1187         int ret;
1188
1189         ret = pthreadpool_tevent_job_recv(subreq);
1190         TALLOC_FREE(subreq);
1191         SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
1192         talloc_set_destructor(state, NULL);
1193         if (ret != 0) {
1194                 if (ret != EAGAIN) {
1195                         tevent_req_error(req, ret);
1196                         return;
1197                 }
1198                 /*
1199                  * If we get EAGAIN from pthreadpool_tevent_job_recv() this
1200                  * means the lower level pthreadpool failed to create a new
1201                  * thread. Fallback to sync processing in that case to allow
1202                  * some progress for the client.
1203                  */
1204                 vfs_gluster_fsync_do(state);
1205         }
1206
1207         tevent_req_done(req);
1208 }
1209
1210 static int vfs_gluster_fsync_recv(struct tevent_req *req,
1211                                   struct vfs_aio_state *vfs_aio_state)
1212 {
1213         struct vfs_gluster_fsync_state *state = tevent_req_data(
1214                 req, struct vfs_gluster_fsync_state);
1215
1216         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1217                 return -1;
1218         }
1219
1220         *vfs_aio_state = state->vfs_aio_state;
1221         return state->ret;
1222 }
1223
1224 static int vfs_gluster_stat(struct vfs_handle_struct *handle,
1225                             struct smb_filename *smb_fname)
1226 {
1227         struct stat st;
1228         int ret;
1229
1230         START_PROFILE(syscall_stat);
1231         ret = glfs_stat(handle->data, smb_fname->base_name, &st);
1232         if (ret == 0) {
1233                 smb_stat_ex_from_stat(&smb_fname->st, &st);
1234         }
1235         if (ret < 0 && errno != ENOENT) {
1236                 DEBUG(0, ("glfs_stat(%s) failed: %s\n",
1237                           smb_fname->base_name, strerror(errno)));
1238         }
1239         END_PROFILE(syscall_stat);
1240
1241         return ret;
1242 }
1243
1244 static int vfs_gluster_fstat(struct vfs_handle_struct *handle,
1245                              files_struct *fsp, SMB_STRUCT_STAT *sbuf)
1246 {
1247         struct stat st;
1248         int ret;
1249         glfs_fd_t *glfd = NULL;
1250
1251         START_PROFILE(syscall_fstat);
1252
1253         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1254         if (glfd == NULL) {
1255                 END_PROFILE(syscall_fstat);
1256                 DBG_ERR("Failed to fetch gluster fd\n");
1257                 return -1;
1258         }
1259
1260         ret = glfs_fstat(glfd, &st);
1261         if (ret == 0) {
1262                 smb_stat_ex_from_stat(sbuf, &st);
1263         }
1264         if (ret < 0) {
1265                 DEBUG(0, ("glfs_fstat(%d) failed: %s\n",
1266                           fsp->fh->fd, strerror(errno)));
1267         }
1268         END_PROFILE(syscall_fstat);
1269
1270         return ret;
1271 }
1272
1273 static int vfs_gluster_lstat(struct vfs_handle_struct *handle,
1274                              struct smb_filename *smb_fname)
1275 {
1276         struct stat st;
1277         int ret;
1278
1279         START_PROFILE(syscall_lstat);
1280         ret = glfs_lstat(handle->data, smb_fname->base_name, &st);
1281         if (ret == 0) {
1282                 smb_stat_ex_from_stat(&smb_fname->st, &st);
1283         }
1284         if (ret < 0 && errno != ENOENT) {
1285                 DEBUG(0, ("glfs_lstat(%s) failed: %s\n",
1286                           smb_fname->base_name, strerror(errno)));
1287         }
1288         END_PROFILE(syscall_lstat);
1289
1290         return ret;
1291 }
1292
1293 static uint64_t vfs_gluster_get_alloc_size(struct vfs_handle_struct *handle,
1294                                            files_struct *fsp,
1295                                            const SMB_STRUCT_STAT *sbuf)
1296 {
1297         uint64_t ret;
1298
1299         START_PROFILE(syscall_get_alloc_size);
1300         ret = sbuf->st_ex_blocks * 512;
1301         END_PROFILE(syscall_get_alloc_size);
1302
1303         return ret;
1304 }
1305
1306 static int vfs_gluster_unlinkat(struct vfs_handle_struct *handle,
1307                         struct files_struct *dirfsp,
1308                         const struct smb_filename *smb_fname,
1309                         int flags)
1310 {
1311         int ret;
1312
1313         START_PROFILE(syscall_unlinkat);
1314         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
1315         if (flags & AT_REMOVEDIR) {
1316                 ret = glfs_rmdir(handle->data, smb_fname->base_name);
1317         } else {
1318                 ret = glfs_unlink(handle->data, smb_fname->base_name);
1319         }
1320         END_PROFILE(syscall_unlinkat);
1321
1322         return ret;
1323 }
1324
1325 static int vfs_gluster_chmod(struct vfs_handle_struct *handle,
1326                                 const struct smb_filename *smb_fname,
1327                                 mode_t mode)
1328 {
1329         int ret;
1330
1331         START_PROFILE(syscall_chmod);
1332         ret = glfs_chmod(handle->data, smb_fname->base_name, mode);
1333         END_PROFILE(syscall_chmod);
1334
1335         return ret;
1336 }
1337
1338 static int vfs_gluster_fchmod(struct vfs_handle_struct *handle,
1339                               files_struct *fsp, mode_t mode)
1340 {
1341         int ret;
1342         glfs_fd_t *glfd = NULL;
1343
1344         START_PROFILE(syscall_fchmod);
1345
1346         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1347         if (glfd == NULL) {
1348                 END_PROFILE(syscall_fchmod);
1349                 DBG_ERR("Failed to fetch gluster fd\n");
1350                 return -1;
1351         }
1352
1353         ret = glfs_fchmod(glfd, mode);
1354         END_PROFILE(syscall_fchmod);
1355
1356         return ret;
1357 }
1358
1359 static int vfs_gluster_fchown(struct vfs_handle_struct *handle,
1360                               files_struct *fsp, uid_t uid, gid_t gid)
1361 {
1362         int ret;
1363         glfs_fd_t *glfd = NULL;
1364
1365         START_PROFILE(syscall_fchown);
1366
1367         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1368         if (glfd == NULL) {
1369                 END_PROFILE(syscall_fchown);
1370                 DBG_ERR("Failed to fetch gluster fd\n");
1371                 return -1;
1372         }
1373
1374         ret = glfs_fchown(glfd, uid, gid);
1375         END_PROFILE(syscall_fchown);
1376
1377         return ret;
1378 }
1379
1380 static int vfs_gluster_lchown(struct vfs_handle_struct *handle,
1381                         const struct smb_filename *smb_fname,
1382                         uid_t uid,
1383                         gid_t gid)
1384 {
1385         int ret;
1386
1387         START_PROFILE(syscall_lchown);
1388         ret = glfs_lchown(handle->data, smb_fname->base_name, uid, gid);
1389         END_PROFILE(syscall_lchown);
1390
1391         return ret;
1392 }
1393
1394 static int vfs_gluster_chdir(struct vfs_handle_struct *handle,
1395                         const struct smb_filename *smb_fname)
1396 {
1397         int ret;
1398
1399         START_PROFILE(syscall_chdir);
1400         ret = glfs_chdir(handle->data, smb_fname->base_name);
1401         END_PROFILE(syscall_chdir);
1402
1403         return ret;
1404 }
1405
1406 static struct smb_filename *vfs_gluster_getwd(struct vfs_handle_struct *handle,
1407                                 TALLOC_CTX *ctx)
1408 {
1409         char *cwd;
1410         char *ret;
1411         struct smb_filename *smb_fname = NULL;
1412
1413         START_PROFILE(syscall_getwd);
1414
1415         cwd = SMB_CALLOC_ARRAY(char, PATH_MAX);
1416         if (cwd == NULL) {
1417                 END_PROFILE(syscall_getwd);
1418                 return NULL;
1419         }
1420
1421         ret = glfs_getcwd(handle->data, cwd, PATH_MAX - 1);
1422         END_PROFILE(syscall_getwd);
1423
1424         if (ret == NULL) {
1425                 SAFE_FREE(cwd);
1426                 return NULL;
1427         }
1428         smb_fname = synthetic_smb_fname(ctx,
1429                                         ret,
1430                                         NULL,
1431                                         NULL,
1432                                         0);
1433         SAFE_FREE(cwd);
1434         return smb_fname;
1435 }
1436
1437 static int vfs_gluster_ntimes(struct vfs_handle_struct *handle,
1438                               const struct smb_filename *smb_fname,
1439                               struct smb_file_time *ft)
1440 {
1441         int ret = -1;
1442         struct timespec times[2];
1443
1444         START_PROFILE(syscall_ntimes);
1445
1446         if (is_omit_timespec(&ft->atime)) {
1447                 times[0].tv_sec = smb_fname->st.st_ex_atime.tv_sec;
1448                 times[0].tv_nsec = smb_fname->st.st_ex_atime.tv_nsec;
1449         } else {
1450                 times[0].tv_sec = ft->atime.tv_sec;
1451                 times[0].tv_nsec = ft->atime.tv_nsec;
1452         }
1453
1454         if (is_omit_timespec(&ft->mtime)) {
1455                 times[1].tv_sec = smb_fname->st.st_ex_mtime.tv_sec;
1456                 times[1].tv_nsec = smb_fname->st.st_ex_mtime.tv_nsec;
1457         } else {
1458                 times[1].tv_sec = ft->mtime.tv_sec;
1459                 times[1].tv_nsec = ft->mtime.tv_nsec;
1460         }
1461
1462         if ((timespec_compare(&times[0],
1463                               &smb_fname->st.st_ex_atime) == 0) &&
1464             (timespec_compare(&times[1],
1465                               &smb_fname->st.st_ex_mtime) == 0)) {
1466                 END_PROFILE(syscall_ntimes);
1467                 return 0;
1468         }
1469
1470         ret = glfs_utimens(handle->data, smb_fname->base_name, times);
1471         END_PROFILE(syscall_ntimes);
1472
1473         return ret;
1474 }
1475
1476 static int vfs_gluster_ftruncate(struct vfs_handle_struct *handle,
1477                                  files_struct *fsp, off_t offset)
1478 {
1479         int ret;
1480         glfs_fd_t *glfd = NULL;
1481
1482         START_PROFILE(syscall_ftruncate);
1483
1484         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1485         if (glfd == NULL) {
1486                 END_PROFILE(syscall_ftruncate);
1487                 DBG_ERR("Failed to fetch gluster fd\n");
1488                 return -1;
1489         }
1490
1491 #ifdef HAVE_GFAPI_VER_7_6
1492         ret = glfs_ftruncate(glfd, offset, NULL, NULL);
1493 #else
1494         ret = glfs_ftruncate(glfd, offset);
1495 #endif
1496         END_PROFILE(syscall_ftruncate);
1497
1498         return ret;
1499 }
1500
1501 static int vfs_gluster_fallocate(struct vfs_handle_struct *handle,
1502                                  struct files_struct *fsp,
1503                                  uint32_t mode,
1504                                  off_t offset, off_t len)
1505 {
1506         int ret;
1507 #ifdef HAVE_GFAPI_VER_6
1508         glfs_fd_t *glfd = NULL;
1509         int keep_size, punch_hole;
1510
1511         START_PROFILE(syscall_fallocate);
1512
1513         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1514         if (glfd == NULL) {
1515                 END_PROFILE(syscall_fallocate);
1516                 DBG_ERR("Failed to fetch gluster fd\n");
1517                 return -1;
1518         }
1519
1520         keep_size = mode & VFS_FALLOCATE_FL_KEEP_SIZE;
1521         punch_hole = mode & VFS_FALLOCATE_FL_PUNCH_HOLE;
1522
1523         mode &= ~(VFS_FALLOCATE_FL_KEEP_SIZE|VFS_FALLOCATE_FL_PUNCH_HOLE);
1524         if (mode != 0) {
1525                 END_PROFILE(syscall_fallocate);
1526                 errno = ENOTSUP;
1527                 return -1;
1528         }
1529
1530         if (punch_hole) {
1531                 ret = glfs_discard(glfd, offset, len);
1532                 if (ret != 0) {
1533                         DBG_DEBUG("glfs_discard failed: %s\n",
1534                                   strerror(errno));
1535                 }
1536         }
1537
1538         ret = glfs_fallocate(glfd, keep_size, offset, len);
1539         END_PROFILE(syscall_fallocate);
1540 #else
1541         errno = ENOTSUP;
1542         ret = -1;
1543 #endif
1544         return ret;
1545 }
1546
1547 static struct smb_filename *vfs_gluster_realpath(struct vfs_handle_struct *handle,
1548                                 TALLOC_CTX *ctx,
1549                                 const struct smb_filename *smb_fname)
1550 {
1551         char *result = NULL;
1552         struct smb_filename *result_fname = NULL;
1553         char *resolved_path = NULL;
1554
1555         START_PROFILE(syscall_realpath);
1556
1557         resolved_path = SMB_MALLOC_ARRAY(char, PATH_MAX+1);
1558         if (resolved_path == NULL) {
1559                 END_PROFILE(syscall_realpath);
1560                 errno = ENOMEM;
1561                 return NULL;
1562         }
1563
1564         result = glfs_realpath(handle->data,
1565                         smb_fname->base_name,
1566                         resolved_path);
1567         if (result != NULL) {
1568                 result_fname = synthetic_smb_fname(ctx, result, NULL, NULL, 0);
1569         }
1570
1571         SAFE_FREE(resolved_path);
1572         END_PROFILE(syscall_realpath);
1573
1574         return result_fname;
1575 }
1576
1577 static bool vfs_gluster_lock(struct vfs_handle_struct *handle,
1578                              files_struct *fsp, int op, off_t offset,
1579                              off_t count, int type)
1580 {
1581         struct flock flock = { 0, };
1582         int ret;
1583         glfs_fd_t *glfd = NULL;
1584         bool ok = false;
1585
1586         START_PROFILE(syscall_fcntl_lock);
1587
1588         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1589         if (glfd == NULL) {
1590                 DBG_ERR("Failed to fetch gluster fd\n");
1591                 ok = false;
1592                 goto out;
1593         }
1594
1595         flock.l_type = type;
1596         flock.l_whence = SEEK_SET;
1597         flock.l_start = offset;
1598         flock.l_len = count;
1599         flock.l_pid = 0;
1600
1601         ret = glfs_posix_lock(glfd, op, &flock);
1602
1603         if (op == F_GETLK) {
1604                 /* lock query, true if someone else has locked */
1605                 if ((ret != -1) &&
1606                     (flock.l_type != F_UNLCK) &&
1607                     (flock.l_pid != 0) && (flock.l_pid != getpid())) {
1608                         ok = true;
1609                         goto out;
1610                 }
1611                 /* not me */
1612                 ok = false;
1613                 goto out;
1614         }
1615
1616         if (ret == -1) {
1617                 ok = false;
1618                 goto out;
1619         }
1620
1621         ok = true;
1622 out:
1623         END_PROFILE(syscall_fcntl_lock);
1624
1625         return ok;
1626 }
1627
1628 static int vfs_gluster_kernel_flock(struct vfs_handle_struct *handle,
1629                                     files_struct *fsp, uint32_t share_access,
1630                                     uint32_t access_mask)
1631 {
1632         errno = ENOSYS;
1633         return -1;
1634 }
1635
1636 static int vfs_gluster_fcntl(vfs_handle_struct *handle,
1637                              files_struct *fsp, int cmd, va_list cmd_arg)
1638 {
1639         /*
1640          * SMB_VFS_FCNTL() is currently only called by vfs_set_blocking() to
1641          * clear O_NONBLOCK, etc for LOCK_MAND and FIFOs. Ignore it.
1642          */
1643         if (cmd == F_GETFL) {
1644                 return 0;
1645         } else if (cmd == F_SETFL) {
1646                 va_list dup_cmd_arg;
1647                 int opt;
1648
1649                 va_copy(dup_cmd_arg, cmd_arg);
1650                 opt = va_arg(dup_cmd_arg, int);
1651                 va_end(dup_cmd_arg);
1652                 if (opt == 0) {
1653                         return 0;
1654                 }
1655                 DBG_ERR("unexpected fcntl SETFL(%d)\n", opt);
1656                 goto err_out;
1657         }
1658         DBG_ERR("unexpected fcntl: %d\n", cmd);
1659 err_out:
1660         errno = EINVAL;
1661         return -1;
1662 }
1663
1664 static int vfs_gluster_linux_setlease(struct vfs_handle_struct *handle,
1665                                       files_struct *fsp, int leasetype)
1666 {
1667         errno = ENOSYS;
1668         return -1;
1669 }
1670
1671 static bool vfs_gluster_getlock(struct vfs_handle_struct *handle,
1672                                 files_struct *fsp, off_t *poffset,
1673                                 off_t *pcount, int *ptype, pid_t *ppid)
1674 {
1675         struct flock flock = { 0, };
1676         int ret;
1677         glfs_fd_t *glfd = NULL;
1678
1679         START_PROFILE(syscall_fcntl_getlock);
1680
1681         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1682         if (glfd == NULL) {
1683                 END_PROFILE(syscall_fcntl_getlock);
1684                 DBG_ERR("Failed to fetch gluster fd\n");
1685                 return false;
1686         }
1687
1688         flock.l_type = *ptype;
1689         flock.l_whence = SEEK_SET;
1690         flock.l_start = *poffset;
1691         flock.l_len = *pcount;
1692         flock.l_pid = 0;
1693
1694         ret = glfs_posix_lock(glfd, F_GETLK, &flock);
1695
1696         if (ret == -1) {
1697                 END_PROFILE(syscall_fcntl_getlock);
1698                 return false;
1699         }
1700
1701         *ptype = flock.l_type;
1702         *poffset = flock.l_start;
1703         *pcount = flock.l_len;
1704         *ppid = flock.l_pid;
1705         END_PROFILE(syscall_fcntl_getlock);
1706
1707         return true;
1708 }
1709
1710 static int vfs_gluster_symlinkat(struct vfs_handle_struct *handle,
1711                                 const char *link_target,
1712                                 struct files_struct *dirfsp,
1713                                 const struct smb_filename *new_smb_fname)
1714 {
1715         int ret;
1716
1717         START_PROFILE(syscall_symlinkat);
1718         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
1719         ret = glfs_symlink(handle->data,
1720                         link_target,
1721                         new_smb_fname->base_name);
1722         END_PROFILE(syscall_symlinkat);
1723
1724         return ret;
1725 }
1726
1727 static int vfs_gluster_readlinkat(struct vfs_handle_struct *handle,
1728                                 files_struct *dirfsp,
1729                                 const struct smb_filename *smb_fname,
1730                                 char *buf,
1731                                 size_t bufsiz)
1732 {
1733         int ret;
1734
1735         START_PROFILE(syscall_readlinkat);
1736         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
1737         ret = glfs_readlink(handle->data, smb_fname->base_name, buf, bufsiz);
1738         END_PROFILE(syscall_readlinkat);
1739
1740         return ret;
1741 }
1742
1743 static int vfs_gluster_linkat(struct vfs_handle_struct *handle,
1744                                 files_struct *srcfsp,
1745                                 const struct smb_filename *old_smb_fname,
1746                                 files_struct *dstfsp,
1747                                 const struct smb_filename *new_smb_fname,
1748                                 int flags)
1749 {
1750         int ret;
1751
1752         START_PROFILE(syscall_linkat);
1753
1754         SMB_ASSERT(srcfsp == srcfsp->conn->cwd_fsp);
1755         SMB_ASSERT(dstfsp == dstfsp->conn->cwd_fsp);
1756
1757         ret = glfs_link(handle->data,
1758                         old_smb_fname->base_name,
1759                         new_smb_fname->base_name);
1760         END_PROFILE(syscall_linkat);
1761
1762         return ret;
1763 }
1764
1765 static int vfs_gluster_mknodat(struct vfs_handle_struct *handle,
1766                                 files_struct *dirfsp,
1767                                 const struct smb_filename *smb_fname,
1768                                 mode_t mode,
1769                                 SMB_DEV_T dev)
1770 {
1771         int ret;
1772
1773         START_PROFILE(syscall_mknodat);
1774         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
1775         ret = glfs_mknod(handle->data, smb_fname->base_name, mode, dev);
1776         END_PROFILE(syscall_mknodat);
1777
1778         return ret;
1779 }
1780
1781 static int vfs_gluster_chflags(struct vfs_handle_struct *handle,
1782                                 const struct smb_filename *smb_fname,
1783                                 unsigned int flags)
1784 {
1785         errno = ENOSYS;
1786         return -1;
1787 }
1788
1789 static int vfs_gluster_get_real_filename(struct vfs_handle_struct *handle,
1790                                          const char *path, const char *name,
1791                                          TALLOC_CTX *mem_ctx, char **found_name)
1792 {
1793         int ret;
1794         char key_buf[GLUSTER_NAME_MAX + 64];
1795         char val_buf[GLUSTER_NAME_MAX + 1];
1796
1797         if (strlen(name) >= GLUSTER_NAME_MAX) {
1798                 errno = ENAMETOOLONG;
1799                 return -1;
1800         }
1801
1802         snprintf(key_buf, GLUSTER_NAME_MAX + 64,
1803                  "glusterfs.get_real_filename:%s", name);
1804
1805         ret = glfs_getxattr(handle->data, path, key_buf, val_buf,
1806                             GLUSTER_NAME_MAX + 1);
1807         if (ret == -1) {
1808                 if (errno == ENOATTR) {
1809                         errno = ENOENT;
1810                 }
1811                 return -1;
1812         }
1813
1814         *found_name = talloc_strdup(mem_ctx, val_buf);
1815         if (found_name[0] == NULL) {
1816                 errno = ENOMEM;
1817                 return -1;
1818         }
1819         return 0;
1820 }
1821
1822 static const char *vfs_gluster_connectpath(struct vfs_handle_struct *handle,
1823                                 const struct smb_filename *smb_fname)
1824 {
1825         return handle->conn->connectpath;
1826 }
1827
1828 /* EA Operations */
1829
1830 static ssize_t vfs_gluster_getxattr(struct vfs_handle_struct *handle,
1831                                 const struct smb_filename *smb_fname,
1832                                 const char *name,
1833                                 void *value,
1834                                 size_t size)
1835 {
1836         return glfs_getxattr(handle->data, smb_fname->base_name,
1837                              name, value, size);
1838 }
1839
1840 static ssize_t vfs_gluster_fgetxattr(struct vfs_handle_struct *handle,
1841                                      files_struct *fsp, const char *name,
1842                                      void *value, size_t size)
1843 {
1844         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1845         if (glfd == NULL) {
1846                 DBG_ERR("Failed to fetch gluster fd\n");
1847                 return -1;
1848         }
1849
1850         return glfs_fgetxattr(glfd, name, value, size);
1851 }
1852
1853 static ssize_t vfs_gluster_listxattr(struct vfs_handle_struct *handle,
1854                                 const struct smb_filename *smb_fname,
1855                                 char *list,
1856                                 size_t size)
1857 {
1858         return glfs_listxattr(handle->data, smb_fname->base_name, list, size);
1859 }
1860
1861 static ssize_t vfs_gluster_flistxattr(struct vfs_handle_struct *handle,
1862                                       files_struct *fsp, char *list,
1863                                       size_t size)
1864 {
1865         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1866         if (glfd == NULL) {
1867                 DBG_ERR("Failed to fetch gluster fd\n");
1868                 return -1;
1869         }
1870
1871         return glfs_flistxattr(glfd, list, size);
1872 }
1873
1874 static int vfs_gluster_removexattr(struct vfs_handle_struct *handle,
1875                                 const struct smb_filename *smb_fname,
1876                                 const char *name)
1877 {
1878         return glfs_removexattr(handle->data, smb_fname->base_name, name);
1879 }
1880
1881 static int vfs_gluster_fremovexattr(struct vfs_handle_struct *handle,
1882                                     files_struct *fsp, const char *name)
1883 {
1884         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1885         if (glfd == NULL) {
1886                 DBG_ERR("Failed to fetch gluster fd\n");
1887                 return -1;
1888         }
1889
1890         return glfs_fremovexattr(glfd, name);
1891 }
1892
1893 static int vfs_gluster_setxattr(struct vfs_handle_struct *handle,
1894                                 const struct smb_filename *smb_fname,
1895                                 const char *name,
1896                                 const void *value, size_t size, int flags)
1897 {
1898         return glfs_setxattr(handle->data, smb_fname->base_name, name, value, size, flags);
1899 }
1900
1901 static int vfs_gluster_fsetxattr(struct vfs_handle_struct *handle,
1902                                  files_struct *fsp, const char *name,
1903                                  const void *value, size_t size, int flags)
1904 {
1905         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1906         if (glfd == NULL) {
1907                 DBG_ERR("Failed to fetch gluster fd\n");
1908                 return -1;
1909         }
1910
1911         return glfs_fsetxattr(glfd, name, value, size, flags);
1912 }
1913
1914 /* AIO Operations */
1915
1916 static bool vfs_gluster_aio_force(struct vfs_handle_struct *handle,
1917                                   files_struct *fsp)
1918 {
1919         return false;
1920 }
1921
1922 static NTSTATUS vfs_gluster_create_dfs_pathat(struct vfs_handle_struct *handle,
1923                                 struct files_struct *dirfsp,
1924                                 const struct smb_filename *smb_fname,
1925                                 const struct referral *reflist,
1926                                 size_t referral_count)
1927 {
1928         TALLOC_CTX *frame = talloc_stackframe();
1929         NTSTATUS status = NT_STATUS_NO_MEMORY;
1930         int ret;
1931         char *msdfs_link = NULL;
1932
1933         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
1934
1935         /* Form the msdfs_link contents */
1936         msdfs_link = msdfs_link_string(frame,
1937                                         reflist,
1938                                         referral_count);
1939         if (msdfs_link == NULL) {
1940                 goto out;
1941         }
1942
1943         ret = glfs_symlink(handle->data,
1944                         msdfs_link,
1945                         smb_fname->base_name);
1946         if (ret == 0) {
1947                 status = NT_STATUS_OK;
1948         } else {
1949                 status = map_nt_error_from_unix(errno);
1950         }
1951
1952   out:
1953
1954         TALLOC_FREE(frame);
1955         return status;
1956 }
1957
1958 /*
1959  * Read and return the contents of a DFS redirect given a
1960  * pathname. A caller can pass in NULL for ppreflist and
1961  * preferral_count but still determine if this was a
1962  * DFS redirect point by getting NT_STATUS_OK back
1963  * without incurring the overhead of reading and parsing
1964  * the referral contents.
1965  */
1966
1967 static NTSTATUS vfs_gluster_read_dfs_pathat(struct vfs_handle_struct *handle,
1968                                 TALLOC_CTX *mem_ctx,
1969                                 struct files_struct *dirfsp,
1970                                 const struct smb_filename *smb_fname,
1971                                 struct referral **ppreflist,
1972                                 size_t *preferral_count)
1973 {
1974         NTSTATUS status = NT_STATUS_NO_MEMORY;
1975         size_t bufsize;
1976         char *link_target = NULL;
1977         int referral_len;
1978         bool ok;
1979 #if defined(HAVE_BROKEN_READLINK)
1980         char link_target_buf[PATH_MAX];
1981 #else
1982         char link_target_buf[7];
1983 #endif
1984
1985         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
1986
1987         if (ppreflist == NULL && preferral_count == NULL) {
1988                 /*
1989                  * We're only checking if this is a DFS
1990                  * redirect. We don't need to return data.
1991                  */
1992                 bufsize = sizeof(link_target_buf);
1993                 link_target = link_target_buf;
1994         } else {
1995                 bufsize = PATH_MAX;
1996                 link_target = talloc_array(mem_ctx, char, bufsize);
1997                 if (!link_target) {
1998                         goto err;
1999                 }
2000         }
2001
2002         referral_len = glfs_readlink(handle->data,
2003                                 smb_fname->base_name,
2004                                 link_target,
2005                                 bufsize - 1);
2006         if (referral_len < 0) {
2007                 if (errno == EINVAL) {
2008                         DBG_INFO("%s is not a link.\n", smb_fname->base_name);
2009                         status = NT_STATUS_OBJECT_TYPE_MISMATCH;
2010                 } else {
2011                         status = map_nt_error_from_unix(errno);
2012                         DBG_ERR("Error reading "
2013                                 "msdfs link %s: %s\n",
2014                                 smb_fname->base_name,
2015                                 strerror(errno));
2016                 }
2017                 goto err;
2018         }
2019         link_target[referral_len] = '\0';
2020
2021         DBG_INFO("%s -> %s\n",
2022                         smb_fname->base_name,
2023                         link_target);
2024
2025         if (!strnequal(link_target, "msdfs:", 6)) {
2026                 status = NT_STATUS_OBJECT_TYPE_MISMATCH;
2027                 goto err;
2028         }
2029
2030         if (ppreflist == NULL && preferral_count == NULL) {
2031                 /* Early return for checking if this is a DFS link. */
2032                 return NT_STATUS_OK;
2033         }
2034
2035         ok = parse_msdfs_symlink(mem_ctx,
2036                         lp_msdfs_shuffle_referrals(SNUM(handle->conn)),
2037                         link_target,
2038                         ppreflist,
2039                         preferral_count);
2040
2041         if (ok) {
2042                 status = NT_STATUS_OK;
2043         } else {
2044                 status = NT_STATUS_NO_MEMORY;
2045         }
2046
2047   err:
2048
2049         if (link_target != link_target_buf) {
2050                 TALLOC_FREE(link_target);
2051         }
2052         return status;
2053 }
2054
2055 static struct vfs_fn_pointers glusterfs_fns = {
2056
2057         /* Disk Operations */
2058
2059         .connect_fn = vfs_gluster_connect,
2060         .disconnect_fn = vfs_gluster_disconnect,
2061         .disk_free_fn = vfs_gluster_disk_free,
2062         .get_quota_fn = vfs_gluster_get_quota,
2063         .set_quota_fn = vfs_gluster_set_quota,
2064         .statvfs_fn = vfs_gluster_statvfs,
2065         .fs_capabilities_fn = vfs_gluster_fs_capabilities,
2066
2067         .get_dfs_referrals_fn = NULL,
2068
2069         /* Directory Operations */
2070
2071         .opendir_fn = vfs_gluster_opendir,
2072         .fdopendir_fn = vfs_gluster_fdopendir,
2073         .readdir_fn = vfs_gluster_readdir,
2074         .seekdir_fn = vfs_gluster_seekdir,
2075         .telldir_fn = vfs_gluster_telldir,
2076         .rewind_dir_fn = vfs_gluster_rewinddir,
2077         .mkdirat_fn = vfs_gluster_mkdirat,
2078         .closedir_fn = vfs_gluster_closedir,
2079
2080         /* File Operations */
2081
2082         .open_fn = vfs_gluster_open,
2083         .create_file_fn = NULL,
2084         .close_fn = vfs_gluster_close,
2085         .pread_fn = vfs_gluster_pread,
2086         .pread_send_fn = vfs_gluster_pread_send,
2087         .pread_recv_fn = vfs_gluster_pread_recv,
2088         .pwrite_fn = vfs_gluster_pwrite,
2089         .pwrite_send_fn = vfs_gluster_pwrite_send,
2090         .pwrite_recv_fn = vfs_gluster_pwrite_recv,
2091         .lseek_fn = vfs_gluster_lseek,
2092         .sendfile_fn = vfs_gluster_sendfile,
2093         .recvfile_fn = vfs_gluster_recvfile,
2094         .renameat_fn = vfs_gluster_renameat,
2095         .fsync_send_fn = vfs_gluster_fsync_send,
2096         .fsync_recv_fn = vfs_gluster_fsync_recv,
2097
2098         .stat_fn = vfs_gluster_stat,
2099         .fstat_fn = vfs_gluster_fstat,
2100         .lstat_fn = vfs_gluster_lstat,
2101         .get_alloc_size_fn = vfs_gluster_get_alloc_size,
2102         .unlinkat_fn = vfs_gluster_unlinkat,
2103
2104         .chmod_fn = vfs_gluster_chmod,
2105         .fchmod_fn = vfs_gluster_fchmod,
2106         .fchown_fn = vfs_gluster_fchown,
2107         .lchown_fn = vfs_gluster_lchown,
2108         .chdir_fn = vfs_gluster_chdir,
2109         .getwd_fn = vfs_gluster_getwd,
2110         .ntimes_fn = vfs_gluster_ntimes,
2111         .ftruncate_fn = vfs_gluster_ftruncate,
2112         .fallocate_fn = vfs_gluster_fallocate,
2113         .lock_fn = vfs_gluster_lock,
2114         .kernel_flock_fn = vfs_gluster_kernel_flock,
2115         .fcntl_fn = vfs_gluster_fcntl,
2116         .linux_setlease_fn = vfs_gluster_linux_setlease,
2117         .getlock_fn = vfs_gluster_getlock,
2118         .symlinkat_fn = vfs_gluster_symlinkat,
2119         .readlinkat_fn = vfs_gluster_readlinkat,
2120         .linkat_fn = vfs_gluster_linkat,
2121         .mknodat_fn = vfs_gluster_mknodat,
2122         .realpath_fn = vfs_gluster_realpath,
2123         .chflags_fn = vfs_gluster_chflags,
2124         .file_id_create_fn = NULL,
2125         .streaminfo_fn = NULL,
2126         .get_real_filename_fn = vfs_gluster_get_real_filename,
2127         .connectpath_fn = vfs_gluster_connectpath,
2128         .create_dfs_pathat_fn = vfs_gluster_create_dfs_pathat,
2129         .read_dfs_pathat_fn = vfs_gluster_read_dfs_pathat,
2130
2131         .brl_lock_windows_fn = NULL,
2132         .brl_unlock_windows_fn = NULL,
2133         .strict_lock_check_fn = NULL,
2134         .translate_name_fn = NULL,
2135         .fsctl_fn = NULL,
2136
2137         /* NT ACL Operations */
2138         .fget_nt_acl_fn = NULL,
2139         .get_nt_acl_fn = NULL,
2140         .fset_nt_acl_fn = NULL,
2141         .audit_file_fn = NULL,
2142
2143         /* Posix ACL Operations */
2144         .sys_acl_get_file_fn = posixacl_xattr_acl_get_file,
2145         .sys_acl_get_fd_fn = posixacl_xattr_acl_get_fd,
2146         .sys_acl_blob_get_file_fn = posix_sys_acl_blob_get_file,
2147         .sys_acl_blob_get_fd_fn = posix_sys_acl_blob_get_fd,
2148         .sys_acl_set_file_fn = posixacl_xattr_acl_set_file,
2149         .sys_acl_set_fd_fn = posixacl_xattr_acl_set_fd,
2150         .sys_acl_delete_def_file_fn = posixacl_xattr_acl_delete_def_file,
2151
2152         /* EA Operations */
2153         .getxattr_fn = vfs_gluster_getxattr,
2154         .getxattrat_send_fn = vfs_not_implemented_getxattrat_send,
2155         .getxattrat_recv_fn = vfs_not_implemented_getxattrat_recv,
2156         .fgetxattr_fn = vfs_gluster_fgetxattr,
2157         .listxattr_fn = vfs_gluster_listxattr,
2158         .flistxattr_fn = vfs_gluster_flistxattr,
2159         .removexattr_fn = vfs_gluster_removexattr,
2160         .fremovexattr_fn = vfs_gluster_fremovexattr,
2161         .setxattr_fn = vfs_gluster_setxattr,
2162         .fsetxattr_fn = vfs_gluster_fsetxattr,
2163
2164         /* AIO Operations */
2165         .aio_force_fn = vfs_gluster_aio_force,
2166
2167         /* Durable handle Operations */
2168         .durable_cookie_fn = NULL,
2169         .durable_disconnect_fn = NULL,
2170         .durable_reconnect_fn = NULL,
2171 };
2172
2173 static_decl_vfs;
2174 NTSTATUS vfs_glusterfs_init(TALLOC_CTX *ctx)
2175 {
2176         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
2177                                 "glusterfs", &glusterfs_fns);
2178 }