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         ssize_t ret;
 877         glfs_fd_t *fd;
 878         const void *buf;
 879         size_t count;
 880         off_t offset;
 881
 882         struct vfs_aio_state vfs_aio_state;
 883         SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
 884 };
 885
 886 static void vfs_gluster_pwrite_do(void *private_data);
 887 static void vfs_gluster_pwrite_done(struct tevent_req *subreq);
 888 static int vfs_gluster_pwrite_state_destructor(struct vfs_gluster_pwrite_state *state);
 889
 890 static struct tevent_req *vfs_gluster_pwrite_send(struct vfs_handle_struct
 891                                                   *handle, TALLOC_CTX *mem_ctx,
 892                                                   struct tevent_context *ev,
 893                                                   files_struct *fsp,
 894                                                   const void *data, size_t n,
 895                                                   off_t offset)
 896 {
 897         struct tevent_req *req, *subreq;
 898         struct vfs_gluster_pwrite_state *state;
 899
 900         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
 901         if (glfd == NULL) {
 902                 DBG_ERR("Failed to fetch gluster fd\n");
 903                 return NULL;
 904         }
 905
 906         req = tevent_req_create(mem_ctx, &state, struct vfs_gluster_pwrite_state);
 907         if (req == NULL) {
 908                 return NULL;
 909         }
 910
 911         state->ret = -1;
 912         state->fd = glfd;
 913         state->buf = data;
 914         state->count = n;
 915         state->offset = offset;
 916
 917         SMBPROFILE_BYTES_ASYNC_START(syscall_asys_pwrite, profile_p,
 918                                      state->profile_bytes, n);
 919         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
 920
 921         subreq = pthreadpool_tevent_job_send(
 922                 state, ev, handle->conn->sconn->pool,
 923                 vfs_gluster_pwrite_do, state);
 924         if (tevent_req_nomem(subreq, req)) {
 925                 return tevent_req_post(req, ev);
 926         }
 927         tevent_req_set_callback(subreq, vfs_gluster_pwrite_done, req);
 928
 929         talloc_set_destructor(state, vfs_gluster_pwrite_state_destructor);
 930
 931         return req;
 932 }
 933
 934 static void vfs_gluster_pwrite_do(void *private_data)
 935 {
 936         struct vfs_gluster_pwrite_state *state = talloc_get_type_abort(
 937                 private_data, struct vfs_gluster_pwrite_state);
 938         struct timespec start_time;
 939         struct timespec end_time;
 940
 941         SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
 942
 943         PROFILE_TIMESTAMP(&start_time);
 944
 945         do {
 946 #ifdef HAVE_GFAPI_VER_7_6
 947                 state->ret = glfs_pwrite(state->fd, state->buf, state->count,
 948                                          state->offset, 0, NULL, NULL);
 949 #else
 950                 state->ret = glfs_pwrite(state->fd, state->buf, state->count,
 951                                          state->offset, 0);
 952 #endif
 953         } while ((state->ret == -1) && (errno == EINTR));
 954
 955         if (state->ret == -1) {
 956                 state->vfs_aio_state.error = errno;
 957         }
 958
 959         PROFILE_TIMESTAMP(&end_time);
 960
 961         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
 962
 963         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
 964 }
 965
 966 static int vfs_gluster_pwrite_state_destructor(struct vfs_gluster_pwrite_state *state)
 967 {
 968         return -1;
 969 }
 970
 971 static void vfs_gluster_pwrite_done(struct tevent_req *subreq)
 972 {
 973         struct tevent_req *req = tevent_req_callback_data(
 974                 subreq, struct tevent_req);
 975         struct vfs_gluster_pwrite_state *state = tevent_req_data(
 976                 req, struct vfs_gluster_pwrite_state);
 977         int ret;
 978
 979         ret = pthreadpool_tevent_job_recv(subreq);
 980         TALLOC_FREE(subreq);
 981         SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
 982         talloc_set_destructor(state, NULL);
 983         if (ret != 0) {
 984                 if (ret != EAGAIN) {
 985                         tevent_req_error(req, ret);
 986                         return;
 987                 }
 988                 /*
 989                  * If we get EAGAIN from pthreadpool_tevent_job_recv() this
 990                  * means the lower level pthreadpool failed to create a new
 991                  * thread. Fallback to sync processing in that case to allow
 992                  * some progress for the client.
 993                  */
 994                 vfs_gluster_pwrite_do(state);
 995         }
 996
 997         tevent_req_done(req);
 998 }
 999
1000 static ssize_t vfs_gluster_pwrite_recv(struct tevent_req *req,
1001                                        struct vfs_aio_state *vfs_aio_state)
1002 {
1003         struct vfs_gluster_pwrite_state *state = tevent_req_data(
1004                 req, struct vfs_gluster_pwrite_state);
1005
1006         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1007                 return -1;
1008         }
1009
1010         *vfs_aio_state = state->vfs_aio_state;
1011
1012         return state->ret;
1013 }
1014
1015 static ssize_t vfs_gluster_pwrite(struct vfs_handle_struct *handle,
1016                                   files_struct *fsp, const void *data,
1017                                   size_t n, off_t offset)
1018 {
1019         ssize_t ret;
1020         glfs_fd_t *glfd = NULL;
1021
1022         START_PROFILE_BYTES(syscall_pwrite, n);
1023
1024         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1025         if (glfd == NULL) {
1026                 END_PROFILE_BYTES(syscall_pwrite);
1027                 DBG_ERR("Failed to fetch gluster fd\n");
1028                 return -1;
1029         }
1030
1031 #ifdef HAVE_GFAPI_VER_7_6
1032         ret = glfs_pwrite(glfd, data, n, offset, 0, NULL, NULL);
1033 #else
1034         ret = glfs_pwrite(glfd, data, n, offset, 0);
1035 #endif
1036         END_PROFILE_BYTES(syscall_pwrite);
1037
1038         return ret;
1039 }
1040
1041 static off_t vfs_gluster_lseek(struct vfs_handle_struct *handle,
1042                                files_struct *fsp, off_t offset, int whence)
1043 {
1044         off_t ret = 0;
1045         glfs_fd_t *glfd = NULL;
1046
1047         START_PROFILE(syscall_lseek);
1048
1049         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1050         if (glfd == NULL) {
1051                 END_PROFILE(syscall_lseek);
1052                 DBG_ERR("Failed to fetch gluster fd\n");
1053                 return -1;
1054         }
1055
1056         ret = glfs_lseek(glfd, offset, whence);
1057         END_PROFILE(syscall_lseek);
1058
1059         return ret;
1060 }
1061
1062 static ssize_t vfs_gluster_sendfile(struct vfs_handle_struct *handle, int tofd,
1063                                     files_struct *fromfsp,
1064                                     const DATA_BLOB *hdr,
1065                                     off_t offset, size_t n)
1066 {
1067         errno = ENOTSUP;
1068         return -1;
1069 }
1070
1071 static ssize_t vfs_gluster_recvfile(struct vfs_handle_struct *handle,
1072                                     int fromfd, files_struct *tofsp,
1073                                     off_t offset, size_t n)
1074 {
1075         errno = ENOTSUP;
1076         return -1;
1077 }
1078
1079 static int vfs_gluster_renameat(struct vfs_handle_struct *handle,
1080                         files_struct *srcfsp,
1081                         const struct smb_filename *smb_fname_src,
1082                         files_struct *dstfsp,
1083                         const struct smb_filename *smb_fname_dst)
1084 {
1085         int ret;
1086
1087         START_PROFILE(syscall_renameat);
1088         ret = glfs_rename(handle->data, smb_fname_src->base_name,
1089                           smb_fname_dst->base_name);
1090         END_PROFILE(syscall_renameat);
1091
1092         return ret;
1093 }
1094
1095 struct vfs_gluster_fsync_state {
1096         ssize_t ret;
1097         glfs_fd_t *fd;
1098
1099         struct vfs_aio_state vfs_aio_state;
1100         SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
1101 };
1102
1103 static void vfs_gluster_fsync_do(void *private_data);
1104 static void vfs_gluster_fsync_done(struct tevent_req *subreq);
1105 static int vfs_gluster_fsync_state_destructor(struct vfs_gluster_fsync_state *state);
1106
1107 static struct tevent_req *vfs_gluster_fsync_send(struct vfs_handle_struct
1108                                                  *handle, TALLOC_CTX *mem_ctx,
1109                                                  struct tevent_context *ev,
1110                                                  files_struct *fsp)
1111 {
1112         struct tevent_req *req, *subreq;
1113         struct vfs_gluster_fsync_state *state;
1114
1115         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1116         if (glfd == NULL) {
1117                 DBG_ERR("Failed to fetch gluster fd\n");
1118                 return NULL;
1119         }
1120
1121         req = tevent_req_create(mem_ctx, &state, struct vfs_gluster_fsync_state);
1122         if (req == NULL) {
1123                 return NULL;
1124         }
1125
1126         state->ret = -1;
1127         state->fd = glfd;
1128
1129         SMBPROFILE_BYTES_ASYNC_START(syscall_asys_fsync, profile_p,
1130                                      state->profile_bytes, 0);
1131         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
1132
1133         subreq = pthreadpool_tevent_job_send(
1134                 state, ev, handle->conn->sconn->pool, vfs_gluster_fsync_do, state);
1135         if (tevent_req_nomem(subreq, req)) {
1136                 return tevent_req_post(req, ev);
1137         }
1138         tevent_req_set_callback(subreq, vfs_gluster_fsync_done, req);
1139
1140         talloc_set_destructor(state, vfs_gluster_fsync_state_destructor);
1141
1142         return req;
1143 }
1144
1145 static void vfs_gluster_fsync_do(void *private_data)
1146 {
1147         struct vfs_gluster_fsync_state *state = talloc_get_type_abort(
1148                 private_data, struct vfs_gluster_fsync_state);
1149         struct timespec start_time;
1150         struct timespec end_time;
1151
1152         SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
1153
1154         PROFILE_TIMESTAMP(&start_time);
1155
1156         do {
1157 #ifdef HAVE_GFAPI_VER_7_6
1158                 state->ret = glfs_fsync(state->fd, NULL, NULL);
1159 #else
1160                 state->ret = glfs_fsync(state->fd);
1161 #endif
1162         } while ((state->ret == -1) && (errno == EINTR));
1163
1164         if (state->ret == -1) {
1165                 state->vfs_aio_state.error = errno;
1166         }
1167
1168         PROFILE_TIMESTAMP(&end_time);
1169
1170         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
1171
1172         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
1173 }
1174
1175 static int vfs_gluster_fsync_state_destructor(struct vfs_gluster_fsync_state *state)
1176 {
1177         return -1;
1178 }
1179
1180 static void vfs_gluster_fsync_done(struct tevent_req *subreq)
1181 {
1182         struct tevent_req *req = tevent_req_callback_data(
1183                 subreq, struct tevent_req);
1184         struct vfs_gluster_fsync_state *state = tevent_req_data(
1185                 req, struct vfs_gluster_fsync_state);
1186         int ret;
1187
1188         ret = pthreadpool_tevent_job_recv(subreq);
1189         TALLOC_FREE(subreq);
1190         SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
1191         talloc_set_destructor(state, NULL);
1192         if (ret != 0) {
1193                 if (ret != EAGAIN) {
1194                         tevent_req_error(req, ret);
1195                         return;
1196                 }
1197                 /*
1198                  * If we get EAGAIN from pthreadpool_tevent_job_recv() this
1199                  * means the lower level pthreadpool failed to create a new
1200                  * thread. Fallback to sync processing in that case to allow
1201                  * some progress for the client.
1202                  */
1203                 vfs_gluster_fsync_do(state);
1204         }
1205
1206         tevent_req_done(req);
1207 }
1208
1209 static int vfs_gluster_fsync_recv(struct tevent_req *req,
1210                                   struct vfs_aio_state *vfs_aio_state)
1211 {
1212         struct vfs_gluster_fsync_state *state = tevent_req_data(
1213                 req, struct vfs_gluster_fsync_state);
1214
1215         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1216                 return -1;
1217         }
1218
1219         *vfs_aio_state = state->vfs_aio_state;
1220         return state->ret;
1221 }
1222
1223 static int vfs_gluster_stat(struct vfs_handle_struct *handle,
1224                             struct smb_filename *smb_fname)
1225 {
1226         struct stat st;
1227         int ret;
1228
1229         START_PROFILE(syscall_stat);
1230         ret = glfs_stat(handle->data, smb_fname->base_name, &st);
1231         if (ret == 0) {
1232                 smb_stat_ex_from_stat(&smb_fname->st, &st);
1233         }
1234         if (ret < 0 && errno != ENOENT) {
1235                 DEBUG(0, ("glfs_stat(%s) failed: %s\n",
1236                           smb_fname->base_name, strerror(errno)));
1237         }
1238         END_PROFILE(syscall_stat);
1239
1240         return ret;
1241 }
1242
1243 static int vfs_gluster_fstat(struct vfs_handle_struct *handle,
1244                              files_struct *fsp, SMB_STRUCT_STAT *sbuf)
1245 {
1246         struct stat st;
1247         int ret;
1248         glfs_fd_t *glfd = NULL;
1249
1250         START_PROFILE(syscall_fstat);
1251
1252         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1253         if (glfd == NULL) {
1254                 END_PROFILE(syscall_fstat);
1255                 DBG_ERR("Failed to fetch gluster fd\n");
1256                 return -1;
1257         }
1258
1259         ret = glfs_fstat(glfd, &st);
1260         if (ret == 0) {
1261                 smb_stat_ex_from_stat(sbuf, &st);
1262         }
1263         if (ret < 0) {
1264                 DEBUG(0, ("glfs_fstat(%d) failed: %s\n",
1265                           fsp->fh->fd, strerror(errno)));
1266         }
1267         END_PROFILE(syscall_fstat);
1268
1269         return ret;
1270 }
1271
1272 static int vfs_gluster_lstat(struct vfs_handle_struct *handle,
1273                              struct smb_filename *smb_fname)
1274 {
1275         struct stat st;
1276         int ret;
1277
1278         START_PROFILE(syscall_lstat);
1279         ret = glfs_lstat(handle->data, smb_fname->base_name, &st);
1280         if (ret == 0) {
1281                 smb_stat_ex_from_stat(&smb_fname->st, &st);
1282         }
1283         if (ret < 0 && errno != ENOENT) {
1284                 DEBUG(0, ("glfs_lstat(%s) failed: %s\n",
1285                           smb_fname->base_name, strerror(errno)));
1286         }
1287         END_PROFILE(syscall_lstat);
1288
1289         return ret;
1290 }
1291
1292 static uint64_t vfs_gluster_get_alloc_size(struct vfs_handle_struct *handle,
1293                                            files_struct *fsp,
1294                                            const SMB_STRUCT_STAT *sbuf)
1295 {
1296         uint64_t ret;
1297
1298         START_PROFILE(syscall_get_alloc_size);
1299         ret = sbuf->st_ex_blocks * 512;
1300         END_PROFILE(syscall_get_alloc_size);
1301
1302         return ret;
1303 }
1304
1305 static int vfs_gluster_unlinkat(struct vfs_handle_struct *handle,
1306                         struct files_struct *dirfsp,
1307                         const struct smb_filename *smb_fname,
1308                         int flags)
1309 {
1310         int ret;
1311
1312         START_PROFILE(syscall_unlinkat);
1313         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
1314         if (flags & AT_REMOVEDIR) {
1315                 ret = glfs_rmdir(handle->data, smb_fname->base_name);
1316         } else {
1317                 ret = glfs_unlink(handle->data, smb_fname->base_name);
1318         }
1319         END_PROFILE(syscall_unlinkat);
1320
1321         return ret;
1322 }
1323
1324 static int vfs_gluster_chmod(struct vfs_handle_struct *handle,
1325                                 const struct smb_filename *smb_fname,
1326                                 mode_t mode)
1327 {
1328         int ret;
1329
1330         START_PROFILE(syscall_chmod);
1331         ret = glfs_chmod(handle->data, smb_fname->base_name, mode);
1332         END_PROFILE(syscall_chmod);
1333
1334         return ret;
1335 }
1336
1337 static int vfs_gluster_fchmod(struct vfs_handle_struct *handle,
1338                               files_struct *fsp, mode_t mode)
1339 {
1340         int ret;
1341         glfs_fd_t *glfd = NULL;
1342
1343         START_PROFILE(syscall_fchmod);
1344
1345         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1346         if (glfd == NULL) {
1347                 END_PROFILE(syscall_fchmod);
1348                 DBG_ERR("Failed to fetch gluster fd\n");
1349                 return -1;
1350         }
1351
1352         ret = glfs_fchmod(glfd, mode);
1353         END_PROFILE(syscall_fchmod);
1354
1355         return ret;
1356 }
1357
1358 static int vfs_gluster_fchown(struct vfs_handle_struct *handle,
1359                               files_struct *fsp, uid_t uid, gid_t gid)
1360 {
1361         int ret;
1362         glfs_fd_t *glfd = NULL;
1363
1364         START_PROFILE(syscall_fchown);
1365
1366         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1367         if (glfd == NULL) {
1368                 END_PROFILE(syscall_fchown);
1369                 DBG_ERR("Failed to fetch gluster fd\n");
1370                 return -1;
1371         }
1372
1373         ret = glfs_fchown(glfd, uid, gid);
1374         END_PROFILE(syscall_fchown);
1375
1376         return ret;
1377 }
1378
1379 static int vfs_gluster_lchown(struct vfs_handle_struct *handle,
1380                         const struct smb_filename *smb_fname,
1381                         uid_t uid,
1382                         gid_t gid)
1383 {
1384         int ret;
1385
1386         START_PROFILE(syscall_lchown);
1387         ret = glfs_lchown(handle->data, smb_fname->base_name, uid, gid);
1388         END_PROFILE(syscall_lchown);
1389
1390         return ret;
1391 }
1392
1393 static int vfs_gluster_chdir(struct vfs_handle_struct *handle,
1394                         const struct smb_filename *smb_fname)
1395 {
1396         int ret;
1397
1398         START_PROFILE(syscall_chdir);
1399         ret = glfs_chdir(handle->data, smb_fname->base_name);
1400         END_PROFILE(syscall_chdir);
1401
1402         return ret;
1403 }
1404
1405 static struct smb_filename *vfs_gluster_getwd(struct vfs_handle_struct *handle,
1406                                 TALLOC_CTX *ctx)
1407 {
1408         char *cwd;
1409         char *ret;
1410         struct smb_filename *smb_fname = NULL;
1411
1412         START_PROFILE(syscall_getwd);
1413
1414         cwd = SMB_CALLOC_ARRAY(char, PATH_MAX);
1415         if (cwd == NULL) {
1416                 END_PROFILE(syscall_getwd);
1417                 return NULL;
1418         }
1419
1420         ret = glfs_getcwd(handle->data, cwd, PATH_MAX - 1);
1421         END_PROFILE(syscall_getwd);
1422
1423         if (ret == NULL) {
1424                 SAFE_FREE(cwd);
1425                 return NULL;
1426         }
1427         smb_fname = synthetic_smb_fname(ctx,
1428                                         ret,
1429                                         NULL,
1430                                         NULL,
1431                                         0);
1432         SAFE_FREE(cwd);
1433         return smb_fname;
1434 }
1435
1436 static int vfs_gluster_ntimes(struct vfs_handle_struct *handle,
1437                               const struct smb_filename *smb_fname,
1438                               struct smb_file_time *ft)
1439 {
1440         int ret = -1;
1441         struct timespec times[2];
1442
1443         START_PROFILE(syscall_ntimes);
1444
1445         if (is_omit_timespec(&ft->atime)) {
1446                 times[0].tv_sec = smb_fname->st.st_ex_atime.tv_sec;
1447                 times[0].tv_nsec = smb_fname->st.st_ex_atime.tv_nsec;
1448         } else {
1449                 times[0].tv_sec = ft->atime.tv_sec;
1450                 times[0].tv_nsec = ft->atime.tv_nsec;
1451         }
1452
1453         if (is_omit_timespec(&ft->mtime)) {
1454                 times[1].tv_sec = smb_fname->st.st_ex_mtime.tv_sec;
1455                 times[1].tv_nsec = smb_fname->st.st_ex_mtime.tv_nsec;
1456         } else {
1457                 times[1].tv_sec = ft->mtime.tv_sec;
1458                 times[1].tv_nsec = ft->mtime.tv_nsec;
1459         }
1460
1461         if ((timespec_compare(&times[0],
1462                               &smb_fname->st.st_ex_atime) == 0) &&
1463             (timespec_compare(&times[1],
1464                               &smb_fname->st.st_ex_mtime) == 0)) {
1465                 END_PROFILE(syscall_ntimes);
1466                 return 0;
1467         }
1468
1469         ret = glfs_utimens(handle->data, smb_fname->base_name, times);
1470         END_PROFILE(syscall_ntimes);
1471
1472         return ret;
1473 }
1474
1475 static int vfs_gluster_ftruncate(struct vfs_handle_struct *handle,
1476                                  files_struct *fsp, off_t offset)
1477 {
1478         int ret;
1479         glfs_fd_t *glfd = NULL;
1480
1481         START_PROFILE(syscall_ftruncate);
1482
1483         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1484         if (glfd == NULL) {
1485                 END_PROFILE(syscall_ftruncate);
1486                 DBG_ERR("Failed to fetch gluster fd\n");
1487                 return -1;
1488         }
1489
1490 #ifdef HAVE_GFAPI_VER_7_6
1491         ret = glfs_ftruncate(glfd, offset, NULL, NULL);
1492 #else
1493         ret = glfs_ftruncate(glfd, offset);
1494 #endif
1495         END_PROFILE(syscall_ftruncate);
1496
1497         return ret;
1498 }
1499
1500 static int vfs_gluster_fallocate(struct vfs_handle_struct *handle,
1501                                  struct files_struct *fsp,
1502                                  uint32_t mode,
1503                                  off_t offset, off_t len)
1504 {
1505         int ret;
1506 #ifdef HAVE_GFAPI_VER_6
1507         glfs_fd_t *glfd = NULL;
1508         int keep_size, punch_hole;
1509
1510         START_PROFILE(syscall_fallocate);
1511
1512         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1513         if (glfd == NULL) {
1514                 END_PROFILE(syscall_fallocate);
1515                 DBG_ERR("Failed to fetch gluster fd\n");
1516                 return -1;
1517         }
1518
1519         keep_size = mode & VFS_FALLOCATE_FL_KEEP_SIZE;
1520         punch_hole = mode & VFS_FALLOCATE_FL_PUNCH_HOLE;
1521
1522         mode &= ~(VFS_FALLOCATE_FL_KEEP_SIZE|VFS_FALLOCATE_FL_PUNCH_HOLE);
1523         if (mode != 0) {
1524                 END_PROFILE(syscall_fallocate);
1525                 errno = ENOTSUP;
1526                 return -1;
1527         }
1528
1529         if (punch_hole) {
1530                 ret = glfs_discard(glfd, offset, len);
1531                 if (ret != 0) {
1532                         DBG_DEBUG("glfs_discard failed: %s\n",
1533                                   strerror(errno));
1534                 }
1535         }
1536
1537         ret = glfs_fallocate(glfd, keep_size, offset, len);
1538         END_PROFILE(syscall_fallocate);
1539 #else
1540         errno = ENOTSUP;
1541         ret = -1;
1542 #endif
1543         return ret;
1544 }
1545
1546 static struct smb_filename *vfs_gluster_realpath(struct vfs_handle_struct *handle,
1547                                 TALLOC_CTX *ctx,
1548                                 const struct smb_filename *smb_fname)
1549 {
1550         char *result = NULL;
1551         struct smb_filename *result_fname = NULL;
1552         char *resolved_path = NULL;
1553
1554         START_PROFILE(syscall_realpath);
1555
1556         resolved_path = SMB_MALLOC_ARRAY(char, PATH_MAX+1);
1557         if (resolved_path == NULL) {
1558                 END_PROFILE(syscall_realpath);
1559                 errno = ENOMEM;
1560                 return NULL;
1561         }
1562
1563         result = glfs_realpath(handle->data,
1564                         smb_fname->base_name,
1565                         resolved_path);
1566         if (result != NULL) {
1567                 result_fname = synthetic_smb_fname(ctx, result, NULL, NULL, 0);
1568         }
1569
1570         SAFE_FREE(resolved_path);
1571         END_PROFILE(syscall_realpath);
1572
1573         return result_fname;
1574 }
1575
1576 static bool vfs_gluster_lock(struct vfs_handle_struct *handle,
1577                              files_struct *fsp, int op, off_t offset,
1578                              off_t count, int type)
1579 {
1580         struct flock flock = { 0, };
1581         int ret;
1582         glfs_fd_t *glfd = NULL;
1583         bool ok = false;
1584
1585         START_PROFILE(syscall_fcntl_lock);
1586
1587         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1588         if (glfd == NULL) {
1589                 DBG_ERR("Failed to fetch gluster fd\n");
1590                 ok = false;
1591                 goto out;
1592         }
1593
1594         flock.l_type = type;
1595         flock.l_whence = SEEK_SET;
1596         flock.l_start = offset;
1597         flock.l_len = count;
1598         flock.l_pid = 0;
1599
1600         ret = glfs_posix_lock(glfd, op, &flock);
1601
1602         if (op == F_GETLK) {
1603                 /* lock query, true if someone else has locked */
1604                 if ((ret != -1) &&
1605                     (flock.l_type != F_UNLCK) &&
1606                     (flock.l_pid != 0) && (flock.l_pid != getpid())) {
1607                         ok = true;
1608                         goto out;
1609                 }
1610                 /* not me */
1611                 ok = false;
1612                 goto out;
1613         }
1614
1615         if (ret == -1) {
1616                 ok = false;
1617                 goto out;
1618         }
1619
1620         ok = true;
1621 out:
1622         END_PROFILE(syscall_fcntl_lock);
1623
1624         return ok;
1625 }
1626
1627 static int vfs_gluster_kernel_flock(struct vfs_handle_struct *handle,
1628                                     files_struct *fsp, uint32_t share_access,
1629                                     uint32_t access_mask)
1630 {
1631         errno = ENOSYS;
1632         return -1;
1633 }
1634
1635 static int vfs_gluster_fcntl(vfs_handle_struct *handle,
1636                              files_struct *fsp, int cmd, va_list cmd_arg)
1637 {
1638         /*
1639          * SMB_VFS_FCNTL() is currently only called by vfs_set_blocking() to
1640          * clear O_NONBLOCK, etc for LOCK_MAND and FIFOs. Ignore it.
1641          */
1642         if (cmd == F_GETFL) {
1643                 return 0;
1644         } else if (cmd == F_SETFL) {
1645                 va_list dup_cmd_arg;
1646                 int opt;
1647
1648                 va_copy(dup_cmd_arg, cmd_arg);
1649                 opt = va_arg(dup_cmd_arg, int);
1650                 va_end(dup_cmd_arg);
1651                 if (opt == 0) {
1652                         return 0;
1653                 }
1654                 DBG_ERR("unexpected fcntl SETFL(%d)\n", opt);
1655                 goto err_out;
1656         }
1657         DBG_ERR("unexpected fcntl: %d\n", cmd);
1658 err_out:
1659         errno = EINVAL;
1660         return -1;
1661 }
1662
1663 static int vfs_gluster_linux_setlease(struct vfs_handle_struct *handle,
1664                                       files_struct *fsp, int leasetype)
1665 {
1666         errno = ENOSYS;
1667         return -1;
1668 }
1669
1670 static bool vfs_gluster_getlock(struct vfs_handle_struct *handle,
1671                                 files_struct *fsp, off_t *poffset,
1672                                 off_t *pcount, int *ptype, pid_t *ppid)
1673 {
1674         struct flock flock = { 0, };
1675         int ret;
1676         glfs_fd_t *glfd = NULL;
1677
1678         START_PROFILE(syscall_fcntl_getlock);
1679
1680         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1681         if (glfd == NULL) {
1682                 END_PROFILE(syscall_fcntl_getlock);
1683                 DBG_ERR("Failed to fetch gluster fd\n");
1684                 return false;
1685         }
1686
1687         flock.l_type = *ptype;
1688         flock.l_whence = SEEK_SET;
1689         flock.l_start = *poffset;
1690         flock.l_len = *pcount;
1691         flock.l_pid = 0;
1692
1693         ret = glfs_posix_lock(glfd, F_GETLK, &flock);
1694
1695         if (ret == -1) {
1696                 END_PROFILE(syscall_fcntl_getlock);
1697                 return false;
1698         }
1699
1700         *ptype = flock.l_type;
1701         *poffset = flock.l_start;
1702         *pcount = flock.l_len;
1703         *ppid = flock.l_pid;
1704         END_PROFILE(syscall_fcntl_getlock);
1705
1706         return true;
1707 }
1708
1709 static int vfs_gluster_symlinkat(struct vfs_handle_struct *handle,
1710                                 const char *link_target,
1711                                 struct files_struct *dirfsp,
1712                                 const struct smb_filename *new_smb_fname)
1713 {
1714         int ret;
1715
1716         START_PROFILE(syscall_symlinkat);
1717         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
1718         ret = glfs_symlink(handle->data,
1719                         link_target,
1720                         new_smb_fname->base_name);
1721         END_PROFILE(syscall_symlinkat);
1722
1723         return ret;
1724 }
1725
1726 static int vfs_gluster_readlinkat(struct vfs_handle_struct *handle,
1727                                 files_struct *dirfsp,
1728                                 const struct smb_filename *smb_fname,
1729                                 char *buf,
1730                                 size_t bufsiz)
1731 {
1732         int ret;
1733
1734         START_PROFILE(syscall_readlinkat);
1735         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
1736         ret = glfs_readlink(handle->data, smb_fname->base_name, buf, bufsiz);
1737         END_PROFILE(syscall_readlinkat);
1738
1739         return ret;
1740 }
1741
1742 static int vfs_gluster_linkat(struct vfs_handle_struct *handle,
1743                                 files_struct *srcfsp,
1744                                 const struct smb_filename *old_smb_fname,
1745                                 files_struct *dstfsp,
1746                                 const struct smb_filename *new_smb_fname,
1747                                 int flags)
1748 {
1749         int ret;
1750
1751         START_PROFILE(syscall_linkat);
1752
1753         SMB_ASSERT(srcfsp == srcfsp->conn->cwd_fsp);
1754         SMB_ASSERT(dstfsp == dstfsp->conn->cwd_fsp);
1755
1756         ret = glfs_link(handle->data,
1757                         old_smb_fname->base_name,
1758                         new_smb_fname->base_name);
1759         END_PROFILE(syscall_linkat);
1760
1761         return ret;
1762 }
1763
1764 static int vfs_gluster_mknodat(struct vfs_handle_struct *handle,
1765                                 files_struct *dirfsp,
1766                                 const struct smb_filename *smb_fname,
1767                                 mode_t mode,
1768                                 SMB_DEV_T dev)
1769 {
1770         int ret;
1771
1772         START_PROFILE(syscall_mknodat);
1773         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
1774         ret = glfs_mknod(handle->data, smb_fname->base_name, mode, dev);
1775         END_PROFILE(syscall_mknodat);
1776
1777         return ret;
1778 }
1779
1780 static int vfs_gluster_chflags(struct vfs_handle_struct *handle,
1781                                 const struct smb_filename *smb_fname,
1782                                 unsigned int flags)
1783 {
1784         errno = ENOSYS;
1785         return -1;
1786 }
1787
1788 static int vfs_gluster_get_real_filename(struct vfs_handle_struct *handle,
1789                                          const char *path, const char *name,
1790                                          TALLOC_CTX *mem_ctx, char **found_name)
1791 {
1792         int ret;
1793         char key_buf[GLUSTER_NAME_MAX + 64];
1794         char val_buf[GLUSTER_NAME_MAX + 1];
1795
1796         if (strlen(name) >= GLUSTER_NAME_MAX) {
1797                 errno = ENAMETOOLONG;
1798                 return -1;
1799         }
1800
1801         snprintf(key_buf, GLUSTER_NAME_MAX + 64,
1802                  "glusterfs.get_real_filename:%s", name);
1803
1804         ret = glfs_getxattr(handle->data, path, key_buf, val_buf,
1805                             GLUSTER_NAME_MAX + 1);
1806         if (ret == -1) {
1807                 if (errno == ENOATTR) {
1808                         errno = ENOENT;
1809                 }
1810                 return -1;
1811         }
1812
1813         *found_name = talloc_strdup(mem_ctx, val_buf);
1814         if (found_name[0] == NULL) {
1815                 errno = ENOMEM;
1816                 return -1;
1817         }
1818         return 0;
1819 }
1820
1821 static const char *vfs_gluster_connectpath(struct vfs_handle_struct *handle,
1822                                 const struct smb_filename *smb_fname)
1823 {
1824         return handle->conn->connectpath;
1825 }
1826
1827 /* EA Operations */
1828
1829 static ssize_t vfs_gluster_getxattr(struct vfs_handle_struct *handle,
1830                                 const struct smb_filename *smb_fname,
1831                                 const char *name,
1832                                 void *value,
1833                                 size_t size)
1834 {
1835         return glfs_getxattr(handle->data, smb_fname->base_name,
1836                              name, value, size);
1837 }
1838
1839 static ssize_t vfs_gluster_fgetxattr(struct vfs_handle_struct *handle,
1840                                      files_struct *fsp, const char *name,
1841                                      void *value, size_t size)
1842 {
1843         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1844         if (glfd == NULL) {
1845                 DBG_ERR("Failed to fetch gluster fd\n");
1846                 return -1;
1847         }
1848
1849         return glfs_fgetxattr(glfd, name, value, size);
1850 }
1851
1852 static ssize_t vfs_gluster_listxattr(struct vfs_handle_struct *handle,
1853                                 const struct smb_filename *smb_fname,
1854                                 char *list,
1855                                 size_t size)
1856 {
1857         return glfs_listxattr(handle->data, smb_fname->base_name, list, size);
1858 }
1859
1860 static ssize_t vfs_gluster_flistxattr(struct vfs_handle_struct *handle,
1861                                       files_struct *fsp, char *list,
1862                                       size_t size)
1863 {
1864         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1865         if (glfd == NULL) {
1866                 DBG_ERR("Failed to fetch gluster fd\n");
1867                 return -1;
1868         }
1869
1870         return glfs_flistxattr(glfd, list, size);
1871 }
1872
1873 static int vfs_gluster_removexattr(struct vfs_handle_struct *handle,
1874                                 const struct smb_filename *smb_fname,
1875                                 const char *name)
1876 {
1877         return glfs_removexattr(handle->data, smb_fname->base_name, name);
1878 }
1879
1880 static int vfs_gluster_fremovexattr(struct vfs_handle_struct *handle,
1881                                     files_struct *fsp, const char *name)
1882 {
1883         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1884         if (glfd == NULL) {
1885                 DBG_ERR("Failed to fetch gluster fd\n");
1886                 return -1;
1887         }
1888
1889         return glfs_fremovexattr(glfd, name);
1890 }
1891
1892 static int vfs_gluster_setxattr(struct vfs_handle_struct *handle,
1893                                 const struct smb_filename *smb_fname,
1894                                 const char *name,
1895                                 const void *value, size_t size, int flags)
1896 {
1897         return glfs_setxattr(handle->data, smb_fname->base_name, name, value, size, flags);
1898 }
1899
1900 static int vfs_gluster_fsetxattr(struct vfs_handle_struct *handle,
1901                                  files_struct *fsp, const char *name,
1902                                  const void *value, size_t size, int flags)
1903 {
1904         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1905         if (glfd == NULL) {
1906                 DBG_ERR("Failed to fetch gluster fd\n");
1907                 return -1;
1908         }
1909
1910         return glfs_fsetxattr(glfd, name, value, size, flags);
1911 }
1912
1913 /* AIO Operations */
1914
1915 static bool vfs_gluster_aio_force(struct vfs_handle_struct *handle,
1916                                   files_struct *fsp)
1917 {
1918         return false;
1919 }
1920
1921 static NTSTATUS vfs_gluster_create_dfs_pathat(struct vfs_handle_struct *handle,
1922                                 struct files_struct *dirfsp,
1923                                 const struct smb_filename *smb_fname,
1924                                 const struct referral *reflist,
1925                                 size_t referral_count)
1926 {
1927         TALLOC_CTX *frame = talloc_stackframe();
1928         NTSTATUS status = NT_STATUS_NO_MEMORY;
1929         int ret;
1930         char *msdfs_link = NULL;
1931
1932         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
1933
1934         /* Form the msdfs_link contents */
1935         msdfs_link = msdfs_link_string(frame,
1936                                         reflist,
1937                                         referral_count);
1938         if (msdfs_link == NULL) {
1939                 goto out;
1940         }
1941
1942         ret = glfs_symlink(handle->data,
1943                         msdfs_link,
1944                         smb_fname->base_name);
1945         if (ret == 0) {
1946                 status = NT_STATUS_OK;
1947         } else {
1948                 status = map_nt_error_from_unix(errno);
1949         }
1950
1951   out:
1952
1953         TALLOC_FREE(frame);
1954         return status;
1955 }
1956
1957 /*
1958  * Read and return the contents of a DFS redirect given a
1959  * pathname. A caller can pass in NULL for ppreflist and
1960  * preferral_count but still determine if this was a
1961  * DFS redirect point by getting NT_STATUS_OK back
1962  * without incurring the overhead of reading and parsing
1963  * the referral contents.
1964  */
1965
1966 static NTSTATUS vfs_gluster_read_dfs_pathat(struct vfs_handle_struct *handle,
1967                                 TALLOC_CTX *mem_ctx,
1968                                 struct files_struct *dirfsp,
1969                                 const struct smb_filename *smb_fname,
1970                                 struct referral **ppreflist,
1971                                 size_t *preferral_count)
1972 {
1973         NTSTATUS status = NT_STATUS_NO_MEMORY;
1974         size_t bufsize;
1975         char *link_target = NULL;
1976         int referral_len;
1977         bool ok;
1978 #if defined(HAVE_BROKEN_READLINK)
1979         char link_target_buf[PATH_MAX];
1980 #else
1981         char link_target_buf[7];
1982 #endif
1983
1984         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
1985
1986         if (ppreflist == NULL && preferral_count == NULL) {
1987                 /*
1988                  * We're only checking if this is a DFS
1989                  * redirect. We don't need to return data.
1990                  */
1991                 bufsize = sizeof(link_target_buf);
1992                 link_target = link_target_buf;
1993         } else {
1994                 bufsize = PATH_MAX;
1995                 link_target = talloc_array(mem_ctx, char, bufsize);
1996                 if (!link_target) {
1997                         goto err;
1998                 }
1999         }
2000
2001         referral_len = glfs_readlink(handle->data,
2002                                 smb_fname->base_name,
2003                                 link_target,
2004                                 bufsize - 1);
2005         if (referral_len < 0) {
2006                 if (errno == EINVAL) {
2007                         DBG_INFO("%s is not a link.\n", smb_fname->base_name);
2008                         status = NT_STATUS_OBJECT_TYPE_MISMATCH;
2009                 } else {
2010                         status = map_nt_error_from_unix(errno);
2011                         DBG_ERR("Error reading "
2012                                 "msdfs link %s: %s\n",
2013                                 smb_fname->base_name,
2014                                 strerror(errno));
2015                 }
2016                 goto err;
2017         }
2018         link_target[referral_len] = '\0';
2019
2020         DBG_INFO("%s -> %s\n",
2021                         smb_fname->base_name,
2022                         link_target);
2023
2024         if (!strnequal(link_target, "msdfs:", 6)) {
2025                 status = NT_STATUS_OBJECT_TYPE_MISMATCH;
2026                 goto err;
2027         }
2028
2029         if (ppreflist == NULL && preferral_count == NULL) {
2030                 /* Early return for checking if this is a DFS link. */
2031                 return NT_STATUS_OK;
2032         }
2033
2034         ok = parse_msdfs_symlink(mem_ctx,
2035                         lp_msdfs_shuffle_referrals(SNUM(handle->conn)),
2036                         link_target,
2037                         ppreflist,
2038                         preferral_count);
2039
2040         if (ok) {
2041                 status = NT_STATUS_OK;
2042         } else {
2043                 status = NT_STATUS_NO_MEMORY;
2044         }
2045
2046   err:
2047
2048         if (link_target != link_target_buf) {
2049                 TALLOC_FREE(link_target);
2050         }
2051         return status;
2052 }
2053
2054 static struct vfs_fn_pointers glusterfs_fns = {
2055
2056         /* Disk Operations */
2057
2058         .connect_fn = vfs_gluster_connect,
2059         .disconnect_fn = vfs_gluster_disconnect,
2060         .disk_free_fn = vfs_gluster_disk_free,
2061         .get_quota_fn = vfs_gluster_get_quota,
2062         .set_quota_fn = vfs_gluster_set_quota,
2063         .statvfs_fn = vfs_gluster_statvfs,
2064         .fs_capabilities_fn = vfs_gluster_fs_capabilities,
2065
2066         .get_dfs_referrals_fn = NULL,
2067
2068         /* Directory Operations */
2069
2070         .opendir_fn = vfs_gluster_opendir,
2071         .fdopendir_fn = vfs_gluster_fdopendir,
2072         .readdir_fn = vfs_gluster_readdir,
2073         .seekdir_fn = vfs_gluster_seekdir,
2074         .telldir_fn = vfs_gluster_telldir,
2075         .rewind_dir_fn = vfs_gluster_rewinddir,
2076         .mkdirat_fn = vfs_gluster_mkdirat,
2077         .closedir_fn = vfs_gluster_closedir,
2078
2079         /* File Operations */
2080
2081         .open_fn = vfs_gluster_open,
2082         .create_file_fn = NULL,
2083         .close_fn = vfs_gluster_close,
2084         .pread_fn = vfs_gluster_pread,
2085         .pread_send_fn = vfs_gluster_pread_send,
2086         .pread_recv_fn = vfs_gluster_pread_recv,
2087         .pwrite_fn = vfs_gluster_pwrite,
2088         .pwrite_send_fn = vfs_gluster_pwrite_send,
2089         .pwrite_recv_fn = vfs_gluster_pwrite_recv,
2090         .lseek_fn = vfs_gluster_lseek,
2091         .sendfile_fn = vfs_gluster_sendfile,
2092         .recvfile_fn = vfs_gluster_recvfile,
2093         .renameat_fn = vfs_gluster_renameat,
2094         .fsync_send_fn = vfs_gluster_fsync_send,
2095         .fsync_recv_fn = vfs_gluster_fsync_recv,
2096
2097         .stat_fn = vfs_gluster_stat,
2098         .fstat_fn = vfs_gluster_fstat,
2099         .lstat_fn = vfs_gluster_lstat,
2100         .get_alloc_size_fn = vfs_gluster_get_alloc_size,
2101         .unlinkat_fn = vfs_gluster_unlinkat,
2102
2103         .chmod_fn = vfs_gluster_chmod,
2104         .fchmod_fn = vfs_gluster_fchmod,
2105         .fchown_fn = vfs_gluster_fchown,
2106         .lchown_fn = vfs_gluster_lchown,
2107         .chdir_fn = vfs_gluster_chdir,
2108         .getwd_fn = vfs_gluster_getwd,
2109         .ntimes_fn = vfs_gluster_ntimes,
2110         .ftruncate_fn = vfs_gluster_ftruncate,
2111         .fallocate_fn = vfs_gluster_fallocate,
2112         .lock_fn = vfs_gluster_lock,
2113         .kernel_flock_fn = vfs_gluster_kernel_flock,
2114         .fcntl_fn = vfs_gluster_fcntl,
2115         .linux_setlease_fn = vfs_gluster_linux_setlease,
2116         .getlock_fn = vfs_gluster_getlock,
2117         .symlinkat_fn = vfs_gluster_symlinkat,
2118         .readlinkat_fn = vfs_gluster_readlinkat,
2119         .linkat_fn = vfs_gluster_linkat,
2120         .mknodat_fn = vfs_gluster_mknodat,
2121         .realpath_fn = vfs_gluster_realpath,
2122         .chflags_fn = vfs_gluster_chflags,
2123         .file_id_create_fn = NULL,
2124         .streaminfo_fn = NULL,
2125         .get_real_filename_fn = vfs_gluster_get_real_filename,
2126         .connectpath_fn = vfs_gluster_connectpath,
2127         .create_dfs_pathat_fn = vfs_gluster_create_dfs_pathat,
2128         .read_dfs_pathat_fn = vfs_gluster_read_dfs_pathat,
2129
2130         .brl_lock_windows_fn = NULL,
2131         .brl_unlock_windows_fn = NULL,
2132         .strict_lock_check_fn = NULL,
2133         .translate_name_fn = NULL,
2134         .fsctl_fn = NULL,
2135
2136         /* NT ACL Operations */
2137         .fget_nt_acl_fn = NULL,
2138         .get_nt_acl_fn = NULL,
2139         .fset_nt_acl_fn = NULL,
2140         .audit_file_fn = NULL,
2141
2142         /* Posix ACL Operations */
2143         .sys_acl_get_file_fn = posixacl_xattr_acl_get_file,
2144         .sys_acl_get_fd_fn = posixacl_xattr_acl_get_fd,
2145         .sys_acl_blob_get_file_fn = posix_sys_acl_blob_get_file,
2146         .sys_acl_blob_get_fd_fn = posix_sys_acl_blob_get_fd,
2147         .sys_acl_set_file_fn = posixacl_xattr_acl_set_file,
2148         .sys_acl_set_fd_fn = posixacl_xattr_acl_set_fd,
2149         .sys_acl_delete_def_file_fn = posixacl_xattr_acl_delete_def_file,
2150
2151         /* EA Operations */
2152         .getxattr_fn = vfs_gluster_getxattr,
2153         .getxattrat_send_fn = vfs_not_implemented_getxattrat_send,
2154         .getxattrat_recv_fn = vfs_not_implemented_getxattrat_recv,
2155         .fgetxattr_fn = vfs_gluster_fgetxattr,
2156         .listxattr_fn = vfs_gluster_listxattr,
2157         .flistxattr_fn = vfs_gluster_flistxattr,
2158         .removexattr_fn = vfs_gluster_removexattr,
2159         .fremovexattr_fn = vfs_gluster_fremovexattr,
2160         .setxattr_fn = vfs_gluster_setxattr,
2161         .fsetxattr_fn = vfs_gluster_fsetxattr,
2162
2163         /* AIO Operations */
2164         .aio_force_fn = vfs_gluster_aio_force,
2165
2166         /* Durable handle Operations */
2167         .durable_cookie_fn = NULL,
2168         .durable_disconnect_fn = NULL,
2169         .durable_reconnect_fn = NULL,
2170 };
2171
2172 static_decl_vfs;
2173 NTSTATUS vfs_glusterfs_init(TALLOC_CTX *ctx)
2174 {
2175         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
2176                                 "glusterfs", &glusterfs_fns);
2177 }