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 check_for_write_behind_translator(TALLOC_CTX *mem_ctx,
 268                                              glfs_t *fs,
 269                                              const char *volume)
 270 {
 271         char *buf = NULL;
 272         char **lines = NULL;
 273         int numlines = 0;
 274         int i;
 275         char *option;
 276         bool write_behind_present = false;
 277         size_t newlen;
 278         int ret;
 279
 280         ret = glfs_get_volfile(fs, NULL, 0);
 281         if (ret == 0) {
 282                 DBG_ERR("%s: Failed to get volfile for "
 283                         "volume (%s): No volfile\n",
 284                         volume,
 285                         strerror(errno));
 286                 return -1;
 287         }
 288         if (ret > 0) {
 289                 DBG_ERR("%s: Invalid return %d for glfs_get_volfile for "
 290                         "volume (%s): No volfile\n",
 291                         volume,
 292                         ret,
 293                         strerror(errno));
 294                 return -1;
 295         }
 296
 297         newlen = 0 - ret;
 298
 299         buf = talloc_zero_array(mem_ctx, char, newlen);
 300         if (buf == NULL) {
 301                 return -1;
 302         }
 303
 304         ret = glfs_get_volfile(fs, buf, newlen);
 305         if (ret != newlen) {
 306                 TALLOC_FREE(buf);
 307                 DBG_ERR("%s: Failed to get volfile for volume (%s)\n",
 308                         volume, strerror(errno));
 309                 return -1;
 310         }
 311
 312         option = talloc_asprintf(mem_ctx, "volume %s-write-behind", volume);
 313         if (option == NULL) {
 314                 TALLOC_FREE(buf);
 315                 return -1;
 316         }
 317
 318         /*
 319          * file_lines_parse() plays horrible tricks with
 320          * the passed-in talloc pointers and the hierarcy
 321          * which makes freeing hard to get right.
 322          *
 323          * As we know mem_ctx is freed by the caller, after
 324          * this point don't free on exit and let the caller
 325          * handle it. This violates good Samba coding practice
 326          * but we know we're not leaking here.
 327          */
 328
 329         lines = file_lines_parse(buf,
 330                                 newlen,
 331                                 &numlines,
 332                                 mem_ctx);
 333         if (lines == NULL || numlines <= 0) {
 334                 return -1;
 335         }
 336         /* On success, buf is now a talloc child of lines !! */
 337
 338         for (i=0; i < numlines; i++) {
 339                 if (strequal(lines[i], option)) {
 340                         write_behind_present = true;
 341                         break;
 342                 }
 343         }
 344
 345         if (write_behind_present) {
 346                 DBG_ERR("Write behind translator is enabled for "
 347                         "volume (%s), refusing to connect! "
 348                         "Please turn off the write behind translator by calling "
 349                         "'gluster volume set %s performance.write-behind off' "
 350                         "on the commandline. "
 351                         "Check the vfs_glusterfs(8) manpage for "
 352                         "further details.\n",
 353                         volume, volume);
 354                 return -1;
 355         }
 356
 357         return 0;
 358 }
 359
 360 static int vfs_gluster_connect(struct vfs_handle_struct *handle,
 361                                const char *service,
 362                                const char *user)
 363 {
 364         const struct loadparm_substitution *lp_sub =
 365                 loadparm_s3_global_substitution();
 366         const char *volfile_servers;
 367         const char *volume;
 368         char *logfile;
 369         int loglevel;
 370         glfs_t *fs = NULL;
 371         TALLOC_CTX *tmp_ctx;
 372         int ret = 0;
 373         bool write_behind_pass_through_set = false;
 374
 375         tmp_ctx = talloc_new(NULL);
 376         if (tmp_ctx == NULL) {
 377                 ret = -1;
 378                 goto done;
 379         }
 380         logfile = lp_parm_substituted_string(tmp_ctx,
 381                                              lp_sub,
 382                                              SNUM(handle->conn),
 383                                              "glusterfs",
 384                                              "logfile",
 385                                              NULL);
 386
 387         loglevel = lp_parm_int(SNUM(handle->conn), "glusterfs", "loglevel", -1);
 388
 389         volfile_servers = lp_parm_substituted_string(tmp_ctx,
 390                                                      lp_sub,
 391                                                      SNUM(handle->conn),
 392                                                      "glusterfs",
 393                                                      "volfile_server",
 394                                                      NULL);
 395         if (volfile_servers == NULL) {
 396                 volfile_servers = DEFAULT_VOLFILE_SERVER;
 397         }
 398
 399         volume = lp_parm_const_string(SNUM(handle->conn), "glusterfs", "volume",
 400                                       NULL);
 401         if (volume == NULL) {
 402                 volume = service;
 403         }
 404
 405         fs = glfs_find_preopened(volume, handle->conn->connectpath);
 406         if (fs) {
 407                 goto done;
 408         }
 409
 410         fs = glfs_new(volume);
 411         if (fs == NULL) {
 412                 ret = -1;
 413                 goto done;
 414         }
 415
 416         ret = vfs_gluster_set_volfile_servers(fs, volfile_servers);
 417         if (ret < 0) {
 418                 DBG_ERR("Failed to set volfile_servers from list %s\n",
 419                         volfile_servers);
 420                 goto done;
 421         }
 422
 423         ret = glfs_set_xlator_option(fs, "*-md-cache", "cache-posix-acl",
 424                                      "true");
 425         if (ret < 0) {
 426                 DEBUG(0, ("%s: Failed to set xlator options\n", volume));
 427                 goto done;
 428         }
 429
 430         ret = glfs_set_xlator_option(fs, "*-md-cache", "cache-selinux",
 431                                      "true");
 432         if (ret < 0) {
 433                 DEBUG(0, ("%s: Failed to set xlator options\n", volume));
 434                 goto done;
 435         }
 436
 437         ret = glfs_set_xlator_option(fs, "*-snapview-client",
 438                                      "snapdir-entry-path",
 439                                      handle->conn->connectpath);
 440         if (ret < 0) {
 441                 DEBUG(0, ("%s: Failed to set xlator option:"
 442                           " snapdir-entry-path\n", volume));
 443                 goto done;
 444         }
 445
 446 #ifdef HAVE_GFAPI_VER_7_9
 447         ret = glfs_set_xlator_option(fs, "*-write-behind", "pass-through",
 448                                      "true");
 449         if (ret < 0) {
 450                 DBG_ERR("%s: Failed to set xlator option: pass-through\n",
 451                         volume);
 452                 goto done;
 453         }
 454         write_behind_pass_through_set = true;
 455 #endif
 456
 457         ret = glfs_set_logging(fs, logfile, loglevel);
 458         if (ret < 0) {
 459                 DEBUG(0, ("%s: Failed to set logfile %s loglevel %d\n",
 460                           volume, logfile, loglevel));
 461                 goto done;
 462         }
 463
 464         ret = glfs_init(fs);
 465         if (ret < 0) {
 466                 DEBUG(0, ("%s: Failed to initialize volume (%s)\n",
 467                           volume, strerror(errno)));
 468                 goto done;
 469         }
 470
 471         if (!write_behind_pass_through_set) {
 472                 ret = check_for_write_behind_translator(tmp_ctx, fs, volume);
 473                 if (ret < 0) {
 474                         goto done;
 475                 }
 476         }
 477
 478         ret = glfs_set_preopened(volume, handle->conn->connectpath, fs);
 479         if (ret < 0) {
 480                 DEBUG(0, ("%s: Failed to register volume (%s)\n",
 481                           volume, strerror(errno)));
 482                 goto done;
 483         }
 484
 485         /*
 486          * The shadow_copy2 module will fail to export subdirectories
 487          * of a gluster volume unless we specify the mount point,
 488          * because the detection fails if the file system is not
 489          * locally mounted:
 490          * https://bugzilla.samba.org/show_bug.cgi?id=13091
 491          */
 492         lp_do_parameter(SNUM(handle->conn), "shadow:mountpoint", "/");
 493
 494         /*
 495          * Unless we have an async implementation of getxattrat turn this off.
 496          */
 497         lp_do_parameter(SNUM(handle->conn), "smbd async dosmode", "false");
 498
 499 done:
 500         if (ret < 0) {
 501                 if (fs)
 502                         glfs_fini(fs);
 503         } else {
 504                 DBG_ERR("%s: Initialized volume from servers %s\n",
 505                         volume, volfile_servers);
 506                 handle->data = fs;
 507         }
 508         talloc_free(tmp_ctx);
 509         return ret;
 510 }
 511
 512 static void vfs_gluster_disconnect(struct vfs_handle_struct *handle)
 513 {
 514         glfs_t *fs = NULL;
 515
 516         fs = handle->data;
 517
 518         glfs_clear_preopened(fs);
 519 }
 520
 521 static uint64_t vfs_gluster_disk_free(struct vfs_handle_struct *handle,
 522                                 const struct smb_filename *smb_fname,
 523                                 uint64_t *bsize_p,
 524                                 uint64_t *dfree_p,
 525                                 uint64_t *dsize_p)
 526 {
 527         struct statvfs statvfs = { 0, };
 528         int ret;
 529
 530         ret = glfs_statvfs(handle->data, smb_fname->base_name, &statvfs);
 531         if (ret < 0) {
 532                 return -1;
 533         }
 534
 535         if (bsize_p != NULL) {
 536                 *bsize_p = (uint64_t)statvfs.f_bsize; /* Block size */
 537         }
 538         if (dfree_p != NULL) {
 539                 *dfree_p = (uint64_t)statvfs.f_bavail; /* Available Block units */
 540         }
 541         if (dsize_p != NULL) {
 542                 *dsize_p = (uint64_t)statvfs.f_blocks; /* Total Block units */
 543         }
 544
 545         return (uint64_t)statvfs.f_bavail;
 546 }
 547
 548 static int vfs_gluster_get_quota(struct vfs_handle_struct *handle,
 549                                 const struct smb_filename *smb_fname,
 550                                 enum SMB_QUOTA_TYPE qtype,
 551                                 unid_t id,
 552                                 SMB_DISK_QUOTA *qt)
 553 {
 554         errno = ENOSYS;
 555         return -1;
 556 }
 557
 558 static int
 559 vfs_gluster_set_quota(struct vfs_handle_struct *handle,
 560                       enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt)
 561 {
 562         errno = ENOSYS;
 563         return -1;
 564 }
 565
 566 static int vfs_gluster_statvfs(struct vfs_handle_struct *handle,
 567                                 const struct smb_filename *smb_fname,
 568                                 struct vfs_statvfs_struct *vfs_statvfs)
 569 {
 570         struct statvfs statvfs = { 0, };
 571         int ret;
 572
 573         ret = glfs_statvfs(handle->data, smb_fname->base_name, &statvfs);
 574         if (ret < 0) {
 575                 DEBUG(0, ("glfs_statvfs(%s) failed: %s\n",
 576                           smb_fname->base_name, strerror(errno)));
 577                 return -1;
 578         }
 579
 580         ZERO_STRUCTP(vfs_statvfs);
 581
 582         vfs_statvfs->OptimalTransferSize = statvfs.f_frsize;
 583         vfs_statvfs->BlockSize = statvfs.f_bsize;
 584         vfs_statvfs->TotalBlocks = statvfs.f_blocks;
 585         vfs_statvfs->BlocksAvail = statvfs.f_bfree;
 586         vfs_statvfs->UserBlocksAvail = statvfs.f_bavail;
 587         vfs_statvfs->TotalFileNodes = statvfs.f_files;
 588         vfs_statvfs->FreeFileNodes = statvfs.f_ffree;
 589         vfs_statvfs->FsIdentifier = statvfs.f_fsid;
 590         vfs_statvfs->FsCapabilities =
 591             FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
 592
 593         return ret;
 594 }
 595
 596 static uint32_t vfs_gluster_fs_capabilities(struct vfs_handle_struct *handle,
 597                                             enum timestamp_set_resolution *p_ts_res)
 598 {
 599         uint32_t caps = FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
 600
 601 #ifdef HAVE_GFAPI_VER_6
 602         caps |= FILE_SUPPORTS_SPARSE_FILES;
 603 #endif
 604
 605 #ifdef STAT_HAVE_NSEC
 606         *p_ts_res = TIMESTAMP_SET_NT_OR_BETTER;
 607 #endif
 608
 609         return caps;
 610 }
 611
 612 static glfs_fd_t *vfs_gluster_fetch_glfd(struct vfs_handle_struct *handle,
 613                                          files_struct *fsp)
 614 {
 615         glfs_fd_t **glfd = (glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp);
 616         if (glfd == NULL) {
 617                 DBG_INFO("Failed to fetch fsp extension\n");
 618                 return NULL;
 619         }
 620         if (*glfd == NULL) {
 621                 DBG_INFO("Empty glfs_fd_t pointer\n");
 622                 return NULL;
 623         }
 624
 625         return *glfd;
 626 }
 627
 628 static DIR *vfs_gluster_fdopendir(struct vfs_handle_struct *handle,
 629                                   files_struct *fsp, const char *mask,
 630                                   uint32_t attributes)
 631 {
 632         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
 633         if (glfd == NULL) {
 634                 DBG_ERR("Failed to fetch gluster fd\n");
 635                 return NULL;
 636         }
 637
 638         return (DIR *)glfd;
 639 }
 640
 641 static int vfs_gluster_closedir(struct vfs_handle_struct *handle, DIR *dirp)
 642 {
 643         int ret;
 644
 645         START_PROFILE(syscall_closedir);
 646         ret = glfs_closedir((void *)dirp);
 647         END_PROFILE(syscall_closedir);
 648
 649         return ret;
 650 }
 651
 652 static struct dirent *vfs_gluster_readdir(struct vfs_handle_struct *handle,
 653                                           DIR *dirp, SMB_STRUCT_STAT *sbuf)
 654 {
 655         static char direntbuf[512];
 656         int ret;
 657         struct stat stat;
 658         struct dirent *dirent = 0;
 659
 660         START_PROFILE(syscall_readdir);
 661         if (sbuf != NULL) {
 662                 ret = glfs_readdirplus_r((void *)dirp, &stat, (void *)direntbuf,
 663                                          &dirent);
 664         } else {
 665                 ret = glfs_readdir_r((void *)dirp, (void *)direntbuf, &dirent);
 666         }
 667
 668         if ((ret < 0) || (dirent == NULL)) {
 669                 END_PROFILE(syscall_readdir);
 670                 return NULL;
 671         }
 672
 673         if (sbuf != NULL) {
 674                 SET_STAT_INVALID(*sbuf);
 675                 if (!S_ISLNK(stat.st_mode)) {
 676                         smb_stat_ex_from_stat(sbuf, &stat);
 677                 }
 678         }
 679
 680         END_PROFILE(syscall_readdir);
 681         return dirent;
 682 }
 683
 684 static long vfs_gluster_telldir(struct vfs_handle_struct *handle, DIR *dirp)
 685 {
 686         long ret;
 687
 688         START_PROFILE(syscall_telldir);
 689         ret = glfs_telldir((void *)dirp);
 690         END_PROFILE(syscall_telldir);
 691
 692         return ret;
 693 }
 694
 695 static void vfs_gluster_seekdir(struct vfs_handle_struct *handle, DIR *dirp,
 696                                 long offset)
 697 {
 698         START_PROFILE(syscall_seekdir);
 699         glfs_seekdir((void *)dirp, offset);
 700         END_PROFILE(syscall_seekdir);
 701 }
 702
 703 static void vfs_gluster_rewinddir(struct vfs_handle_struct *handle, DIR *dirp)
 704 {
 705         START_PROFILE(syscall_rewinddir);
 706         glfs_seekdir((void *)dirp, 0);
 707         END_PROFILE(syscall_rewinddir);
 708 }
 709
 710 static int vfs_gluster_mkdirat(struct vfs_handle_struct *handle,
 711                         struct files_struct *dirfsp,
 712                         const struct smb_filename *smb_fname,
 713                         mode_t mode)
 714 {
 715         int ret;
 716
 717         START_PROFILE(syscall_mkdirat);
 718         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
 719         ret = glfs_mkdir(handle->data, smb_fname->base_name, mode);
 720         END_PROFILE(syscall_mkdirat);
 721
 722         return ret;
 723 }
 724
 725 static int vfs_gluster_openat(struct vfs_handle_struct *handle,
 726                               const struct files_struct *dirfsp,
 727                               const struct smb_filename *smb_fname,
 728                               files_struct *fsp,
 729                               int flags,
 730                               mode_t mode)
 731 {
 732         glfs_fd_t *glfd;
 733         glfs_fd_t **p_tmp;
 734
 735         START_PROFILE(syscall_openat);
 736
 737         /*
 738          * Looks like glfs API doesn't have openat().
 739          */
 740         SMB_ASSERT(fsp_get_pathref_fd(dirfsp) == AT_FDCWD);
 741
 742         p_tmp = VFS_ADD_FSP_EXTENSION(handle, fsp, glfs_fd_t *, NULL);
 743         if (p_tmp == NULL) {
 744                 END_PROFILE(syscall_openat);
 745                 errno = ENOMEM;
 746                 return -1;
 747         }
 748
 749         if (flags & O_DIRECTORY) {
 750                 glfd = glfs_opendir(handle->data, smb_fname->base_name);
 751         } else if (flags & O_CREAT) {
 752                 glfd = glfs_creat(handle->data, smb_fname->base_name, flags,
 753                                   mode);
 754         } else {
 755                 glfd = glfs_open(handle->data, smb_fname->base_name, flags);
 756         }
 757
 758         if (glfd == NULL) {
 759                 END_PROFILE(syscall_openat);
 760                 /* no extension destroy_fn, so no need to save errno */
 761                 VFS_REMOVE_FSP_EXTENSION(handle, fsp);
 762                 return -1;
 763         }
 764
 765         *p_tmp = glfd;
 766
 767         END_PROFILE(syscall_openat);
 768         /* An arbitrary value for error reporting, so you know its us. */
 769         return 13371337;
 770 }
 771
 772 static int vfs_gluster_close(struct vfs_handle_struct *handle,
 773                              files_struct *fsp)
 774 {
 775         int ret;
 776         glfs_fd_t *glfd = NULL;
 777
 778         START_PROFILE(syscall_close);
 779
 780         glfd = vfs_gluster_fetch_glfd(handle, fsp);
 781         if (glfd == NULL) {
 782                 END_PROFILE(syscall_close);
 783                 DBG_ERR("Failed to fetch gluster fd\n");
 784                 return -1;
 785         }
 786
 787         VFS_REMOVE_FSP_EXTENSION(handle, fsp);
 788
 789         ret = glfs_close(glfd);
 790         END_PROFILE(syscall_close);
 791
 792         return ret;
 793 }
 794
 795 static ssize_t vfs_gluster_pread(struct vfs_handle_struct *handle,
 796                                  files_struct *fsp, void *data, size_t n,
 797                                  off_t offset)
 798 {
 799         ssize_t ret;
 800         glfs_fd_t *glfd = NULL;
 801
 802         START_PROFILE_BYTES(syscall_pread, n);
 803
 804         glfd = vfs_gluster_fetch_glfd(handle, fsp);
 805         if (glfd == NULL) {
 806                 END_PROFILE_BYTES(syscall_pread);
 807                 DBG_ERR("Failed to fetch gluster fd\n");
 808                 return -1;
 809         }
 810
 811 #ifdef HAVE_GFAPI_VER_7_6
 812         ret = glfs_pread(glfd, data, n, offset, 0, NULL);
 813 #else
 814         ret = glfs_pread(glfd, data, n, offset, 0);
 815 #endif
 816         END_PROFILE_BYTES(syscall_pread);
 817
 818         return ret;
 819 }
 820
 821 struct vfs_gluster_pread_state {
 822         ssize_t ret;
 823         glfs_fd_t *fd;
 824         void *buf;
 825         size_t count;
 826         off_t offset;
 827
 828         struct vfs_aio_state vfs_aio_state;
 829         SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
 830 };
 831
 832 static void vfs_gluster_pread_do(void *private_data);
 833 static void vfs_gluster_pread_done(struct tevent_req *subreq);
 834 static int vfs_gluster_pread_state_destructor(struct vfs_gluster_pread_state *state);
 835
 836 static struct tevent_req *vfs_gluster_pread_send(struct vfs_handle_struct
 837                                                   *handle, TALLOC_CTX *mem_ctx,
 838                                                   struct tevent_context *ev,
 839                                                   files_struct *fsp,
 840                                                   void *data, size_t n,
 841                                                   off_t offset)
 842 {
 843         struct vfs_gluster_pread_state *state;
 844         struct tevent_req *req, *subreq;
 845
 846         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
 847         if (glfd == NULL) {
 848                 DBG_ERR("Failed to fetch gluster fd\n");
 849                 return NULL;
 850         }
 851
 852         req = tevent_req_create(mem_ctx, &state, struct vfs_gluster_pread_state);
 853         if (req == NULL) {
 854                 return NULL;
 855         }
 856
 857         state->ret = -1;
 858         state->fd = glfd;
 859         state->buf = data;
 860         state->count = n;
 861         state->offset = offset;
 862
 863         SMBPROFILE_BYTES_ASYNC_START(syscall_asys_pread, profile_p,
 864                                      state->profile_bytes, n);
 865         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
 866
 867         subreq = pthreadpool_tevent_job_send(
 868                 state, ev, handle->conn->sconn->pool,
 869                 vfs_gluster_pread_do, state);
 870         if (tevent_req_nomem(subreq, req)) {
 871                 return tevent_req_post(req, ev);
 872         }
 873         tevent_req_set_callback(subreq, vfs_gluster_pread_done, req);
 874
 875         talloc_set_destructor(state, vfs_gluster_pread_state_destructor);
 876
 877         return req;
 878 }
 879
 880 static void vfs_gluster_pread_do(void *private_data)
 881 {
 882         struct vfs_gluster_pread_state *state = talloc_get_type_abort(
 883                 private_data, struct vfs_gluster_pread_state);
 884         struct timespec start_time;
 885         struct timespec end_time;
 886
 887         SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
 888
 889         PROFILE_TIMESTAMP(&start_time);
 890
 891         do {
 892 #ifdef HAVE_GFAPI_VER_7_6
 893                 state->ret = glfs_pread(state->fd, state->buf, state->count,
 894                                         state->offset, 0, NULL);
 895 #else
 896                 state->ret = glfs_pread(state->fd, state->buf, state->count,
 897                                         state->offset, 0);
 898 #endif
 899         } while ((state->ret == -1) && (errno == EINTR));
 900
 901         if (state->ret == -1) {
 902                 state->vfs_aio_state.error = errno;
 903         }
 904
 905         PROFILE_TIMESTAMP(&end_time);
 906
 907         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
 908
 909         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
 910 }
 911
 912 static int vfs_gluster_pread_state_destructor(struct vfs_gluster_pread_state *state)
 913 {
 914         return -1;
 915 }
 916
 917 static void vfs_gluster_pread_done(struct tevent_req *subreq)
 918 {
 919         struct tevent_req *req = tevent_req_callback_data(
 920                 subreq, struct tevent_req);
 921         struct vfs_gluster_pread_state *state = tevent_req_data(
 922                 req, struct vfs_gluster_pread_state);
 923         int ret;
 924
 925         ret = pthreadpool_tevent_job_recv(subreq);
 926         TALLOC_FREE(subreq);
 927         SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
 928         talloc_set_destructor(state, NULL);
 929         if (ret != 0) {
 930                 if (ret != EAGAIN) {
 931                         tevent_req_error(req, ret);
 932                         return;
 933                 }
 934                 /*
 935                  * If we get EAGAIN from pthreadpool_tevent_job_recv() this
 936                  * means the lower level pthreadpool failed to create a new
 937                  * thread. Fallback to sync processing in that case to allow
 938                  * some progress for the client.
 939                  */
 940                 vfs_gluster_pread_do(state);
 941         }
 942
 943         tevent_req_done(req);
 944 }
 945
 946 static ssize_t vfs_gluster_pread_recv(struct tevent_req *req,
 947                                       struct vfs_aio_state *vfs_aio_state)
 948 {
 949         struct vfs_gluster_pread_state *state = tevent_req_data(
 950                 req, struct vfs_gluster_pread_state);
 951
 952         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
 953                 return -1;
 954         }
 955
 956         *vfs_aio_state = state->vfs_aio_state;
 957         return state->ret;
 958 }
 959
 960 struct vfs_gluster_pwrite_state {
 961         ssize_t ret;
 962         glfs_fd_t *fd;
 963         const void *buf;
 964         size_t count;
 965         off_t offset;
 966
 967         struct vfs_aio_state vfs_aio_state;
 968         SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
 969 };
 970
 971 static void vfs_gluster_pwrite_do(void *private_data);
 972 static void vfs_gluster_pwrite_done(struct tevent_req *subreq);
 973 static int vfs_gluster_pwrite_state_destructor(struct vfs_gluster_pwrite_state *state);
 974
 975 static struct tevent_req *vfs_gluster_pwrite_send(struct vfs_handle_struct
 976                                                   *handle, TALLOC_CTX *mem_ctx,
 977                                                   struct tevent_context *ev,
 978                                                   files_struct *fsp,
 979                                                   const void *data, size_t n,
 980                                                   off_t offset)
 981 {
 982         struct tevent_req *req, *subreq;
 983         struct vfs_gluster_pwrite_state *state;
 984
 985         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
 986         if (glfd == NULL) {
 987                 DBG_ERR("Failed to fetch gluster fd\n");
 988                 return NULL;
 989         }
 990
 991         req = tevent_req_create(mem_ctx, &state, struct vfs_gluster_pwrite_state);
 992         if (req == NULL) {
 993                 return NULL;
 994         }
 995
 996         state->ret = -1;
 997         state->fd = glfd;
 998         state->buf = data;
 999         state->count = n;
1000         state->offset = offset;
1001
1002         SMBPROFILE_BYTES_ASYNC_START(syscall_asys_pwrite, profile_p,
1003                                      state->profile_bytes, n);
1004         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
1005
1006         subreq = pthreadpool_tevent_job_send(
1007                 state, ev, handle->conn->sconn->pool,
1008                 vfs_gluster_pwrite_do, state);
1009         if (tevent_req_nomem(subreq, req)) {
1010                 return tevent_req_post(req, ev);
1011         }
1012         tevent_req_set_callback(subreq, vfs_gluster_pwrite_done, req);
1013
1014         talloc_set_destructor(state, vfs_gluster_pwrite_state_destructor);
1015
1016         return req;
1017 }
1018
1019 static void vfs_gluster_pwrite_do(void *private_data)
1020 {
1021         struct vfs_gluster_pwrite_state *state = talloc_get_type_abort(
1022                 private_data, struct vfs_gluster_pwrite_state);
1023         struct timespec start_time;
1024         struct timespec end_time;
1025
1026         SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
1027
1028         PROFILE_TIMESTAMP(&start_time);
1029
1030         do {
1031 #ifdef HAVE_GFAPI_VER_7_6
1032                 state->ret = glfs_pwrite(state->fd, state->buf, state->count,
1033                                          state->offset, 0, NULL, NULL);
1034 #else
1035                 state->ret = glfs_pwrite(state->fd, state->buf, state->count,
1036                                          state->offset, 0);
1037 #endif
1038         } while ((state->ret == -1) && (errno == EINTR));
1039
1040         if (state->ret == -1) {
1041                 state->vfs_aio_state.error = errno;
1042         }
1043
1044         PROFILE_TIMESTAMP(&end_time);
1045
1046         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
1047
1048         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
1049 }
1050
1051 static int vfs_gluster_pwrite_state_destructor(struct vfs_gluster_pwrite_state *state)
1052 {
1053         return -1;
1054 }
1055
1056 static void vfs_gluster_pwrite_done(struct tevent_req *subreq)
1057 {
1058         struct tevent_req *req = tevent_req_callback_data(
1059                 subreq, struct tevent_req);
1060         struct vfs_gluster_pwrite_state *state = tevent_req_data(
1061                 req, struct vfs_gluster_pwrite_state);
1062         int ret;
1063
1064         ret = pthreadpool_tevent_job_recv(subreq);
1065         TALLOC_FREE(subreq);
1066         SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
1067         talloc_set_destructor(state, NULL);
1068         if (ret != 0) {
1069                 if (ret != EAGAIN) {
1070                         tevent_req_error(req, ret);
1071                         return;
1072                 }
1073                 /*
1074                  * If we get EAGAIN from pthreadpool_tevent_job_recv() this
1075                  * means the lower level pthreadpool failed to create a new
1076                  * thread. Fallback to sync processing in that case to allow
1077                  * some progress for the client.
1078                  */
1079                 vfs_gluster_pwrite_do(state);
1080         }
1081
1082         tevent_req_done(req);
1083 }
1084
1085 static ssize_t vfs_gluster_pwrite_recv(struct tevent_req *req,
1086                                        struct vfs_aio_state *vfs_aio_state)
1087 {
1088         struct vfs_gluster_pwrite_state *state = tevent_req_data(
1089                 req, struct vfs_gluster_pwrite_state);
1090
1091         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1092                 return -1;
1093         }
1094
1095         *vfs_aio_state = state->vfs_aio_state;
1096
1097         return state->ret;
1098 }
1099
1100 static ssize_t vfs_gluster_pwrite(struct vfs_handle_struct *handle,
1101                                   files_struct *fsp, const void *data,
1102                                   size_t n, off_t offset)
1103 {
1104         ssize_t ret;
1105         glfs_fd_t *glfd = NULL;
1106
1107         START_PROFILE_BYTES(syscall_pwrite, n);
1108
1109         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1110         if (glfd == NULL) {
1111                 END_PROFILE_BYTES(syscall_pwrite);
1112                 DBG_ERR("Failed to fetch gluster fd\n");
1113                 return -1;
1114         }
1115
1116 #ifdef HAVE_GFAPI_VER_7_6
1117         ret = glfs_pwrite(glfd, data, n, offset, 0, NULL, NULL);
1118 #else
1119         ret = glfs_pwrite(glfd, data, n, offset, 0);
1120 #endif
1121         END_PROFILE_BYTES(syscall_pwrite);
1122
1123         return ret;
1124 }
1125
1126 static off_t vfs_gluster_lseek(struct vfs_handle_struct *handle,
1127                                files_struct *fsp, off_t offset, int whence)
1128 {
1129         off_t ret = 0;
1130         glfs_fd_t *glfd = NULL;
1131
1132         START_PROFILE(syscall_lseek);
1133
1134         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1135         if (glfd == NULL) {
1136                 END_PROFILE(syscall_lseek);
1137                 DBG_ERR("Failed to fetch gluster fd\n");
1138                 return -1;
1139         }
1140
1141         ret = glfs_lseek(glfd, offset, whence);
1142         END_PROFILE(syscall_lseek);
1143
1144         return ret;
1145 }
1146
1147 static ssize_t vfs_gluster_sendfile(struct vfs_handle_struct *handle, int tofd,
1148                                     files_struct *fromfsp,
1149                                     const DATA_BLOB *hdr,
1150                                     off_t offset, size_t n)
1151 {
1152         errno = ENOTSUP;
1153         return -1;
1154 }
1155
1156 static ssize_t vfs_gluster_recvfile(struct vfs_handle_struct *handle,
1157                                     int fromfd, files_struct *tofsp,
1158                                     off_t offset, size_t n)
1159 {
1160         errno = ENOTSUP;
1161         return -1;
1162 }
1163
1164 static int vfs_gluster_renameat(struct vfs_handle_struct *handle,
1165                         files_struct *srcfsp,
1166                         const struct smb_filename *smb_fname_src,
1167                         files_struct *dstfsp,
1168                         const struct smb_filename *smb_fname_dst)
1169 {
1170         int ret;
1171
1172         START_PROFILE(syscall_renameat);
1173         ret = glfs_rename(handle->data, smb_fname_src->base_name,
1174                           smb_fname_dst->base_name);
1175         END_PROFILE(syscall_renameat);
1176
1177         return ret;
1178 }
1179
1180 struct vfs_gluster_fsync_state {
1181         ssize_t ret;
1182         glfs_fd_t *fd;
1183
1184         struct vfs_aio_state vfs_aio_state;
1185         SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
1186 };
1187
1188 static void vfs_gluster_fsync_do(void *private_data);
1189 static void vfs_gluster_fsync_done(struct tevent_req *subreq);
1190 static int vfs_gluster_fsync_state_destructor(struct vfs_gluster_fsync_state *state);
1191
1192 static struct tevent_req *vfs_gluster_fsync_send(struct vfs_handle_struct
1193                                                  *handle, TALLOC_CTX *mem_ctx,
1194                                                  struct tevent_context *ev,
1195                                                  files_struct *fsp)
1196 {
1197         struct tevent_req *req, *subreq;
1198         struct vfs_gluster_fsync_state *state;
1199
1200         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1201         if (glfd == NULL) {
1202                 DBG_ERR("Failed to fetch gluster fd\n");
1203                 return NULL;
1204         }
1205
1206         req = tevent_req_create(mem_ctx, &state, struct vfs_gluster_fsync_state);
1207         if (req == NULL) {
1208                 return NULL;
1209         }
1210
1211         state->ret = -1;
1212         state->fd = glfd;
1213
1214         SMBPROFILE_BYTES_ASYNC_START(syscall_asys_fsync, profile_p,
1215                                      state->profile_bytes, 0);
1216         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
1217
1218         subreq = pthreadpool_tevent_job_send(
1219                 state, ev, handle->conn->sconn->pool, vfs_gluster_fsync_do, state);
1220         if (tevent_req_nomem(subreq, req)) {
1221                 return tevent_req_post(req, ev);
1222         }
1223         tevent_req_set_callback(subreq, vfs_gluster_fsync_done, req);
1224
1225         talloc_set_destructor(state, vfs_gluster_fsync_state_destructor);
1226
1227         return req;
1228 }
1229
1230 static void vfs_gluster_fsync_do(void *private_data)
1231 {
1232         struct vfs_gluster_fsync_state *state = talloc_get_type_abort(
1233                 private_data, struct vfs_gluster_fsync_state);
1234         struct timespec start_time;
1235         struct timespec end_time;
1236
1237         SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
1238
1239         PROFILE_TIMESTAMP(&start_time);
1240
1241         do {
1242 #ifdef HAVE_GFAPI_VER_7_6
1243                 state->ret = glfs_fsync(state->fd, NULL, NULL);
1244 #else
1245                 state->ret = glfs_fsync(state->fd);
1246 #endif
1247         } while ((state->ret == -1) && (errno == EINTR));
1248
1249         if (state->ret == -1) {
1250                 state->vfs_aio_state.error = errno;
1251         }
1252
1253         PROFILE_TIMESTAMP(&end_time);
1254
1255         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
1256
1257         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
1258 }
1259
1260 static int vfs_gluster_fsync_state_destructor(struct vfs_gluster_fsync_state *state)
1261 {
1262         return -1;
1263 }
1264
1265 static void vfs_gluster_fsync_done(struct tevent_req *subreq)
1266 {
1267         struct tevent_req *req = tevent_req_callback_data(
1268                 subreq, struct tevent_req);
1269         struct vfs_gluster_fsync_state *state = tevent_req_data(
1270                 req, struct vfs_gluster_fsync_state);
1271         int ret;
1272
1273         ret = pthreadpool_tevent_job_recv(subreq);
1274         TALLOC_FREE(subreq);
1275         SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
1276         talloc_set_destructor(state, NULL);
1277         if (ret != 0) {
1278                 if (ret != EAGAIN) {
1279                         tevent_req_error(req, ret);
1280                         return;
1281                 }
1282                 /*
1283                  * If we get EAGAIN from pthreadpool_tevent_job_recv() this
1284                  * means the lower level pthreadpool failed to create a new
1285                  * thread. Fallback to sync processing in that case to allow
1286                  * some progress for the client.
1287                  */
1288                 vfs_gluster_fsync_do(state);
1289         }
1290
1291         tevent_req_done(req);
1292 }
1293
1294 static int vfs_gluster_fsync_recv(struct tevent_req *req,
1295                                   struct vfs_aio_state *vfs_aio_state)
1296 {
1297         struct vfs_gluster_fsync_state *state = tevent_req_data(
1298                 req, struct vfs_gluster_fsync_state);
1299
1300         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1301                 return -1;
1302         }
1303
1304         *vfs_aio_state = state->vfs_aio_state;
1305         return state->ret;
1306 }
1307
1308 static int vfs_gluster_stat(struct vfs_handle_struct *handle,
1309                             struct smb_filename *smb_fname)
1310 {
1311         struct stat st;
1312         int ret;
1313
1314         START_PROFILE(syscall_stat);
1315         ret = glfs_stat(handle->data, smb_fname->base_name, &st);
1316         if (ret == 0) {
1317                 smb_stat_ex_from_stat(&smb_fname->st, &st);
1318         }
1319         if (ret < 0 && errno != ENOENT) {
1320                 DEBUG(0, ("glfs_stat(%s) failed: %s\n",
1321                           smb_fname->base_name, strerror(errno)));
1322         }
1323         END_PROFILE(syscall_stat);
1324
1325         return ret;
1326 }
1327
1328 static int vfs_gluster_fstat(struct vfs_handle_struct *handle,
1329                              files_struct *fsp, SMB_STRUCT_STAT *sbuf)
1330 {
1331         struct stat st;
1332         int ret;
1333         glfs_fd_t *glfd = NULL;
1334
1335         START_PROFILE(syscall_fstat);
1336
1337         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1338         if (glfd == NULL) {
1339                 END_PROFILE(syscall_fstat);
1340                 DBG_ERR("Failed to fetch gluster fd\n");
1341                 return -1;
1342         }
1343
1344         ret = glfs_fstat(glfd, &st);
1345         if (ret == 0) {
1346                 smb_stat_ex_from_stat(sbuf, &st);
1347         }
1348         if (ret < 0) {
1349                 DEBUG(0, ("glfs_fstat(%d) failed: %s\n",
1350                           fsp_get_io_fd(fsp), strerror(errno)));
1351         }
1352         END_PROFILE(syscall_fstat);
1353
1354         return ret;
1355 }
1356
1357 static int vfs_gluster_lstat(struct vfs_handle_struct *handle,
1358                              struct smb_filename *smb_fname)
1359 {
1360         struct stat st;
1361         int ret;
1362
1363         START_PROFILE(syscall_lstat);
1364         ret = glfs_lstat(handle->data, smb_fname->base_name, &st);
1365         if (ret == 0) {
1366                 smb_stat_ex_from_stat(&smb_fname->st, &st);
1367         }
1368         if (ret < 0 && errno != ENOENT) {
1369                 DEBUG(0, ("glfs_lstat(%s) failed: %s\n",
1370                           smb_fname->base_name, strerror(errno)));
1371         }
1372         END_PROFILE(syscall_lstat);
1373
1374         return ret;
1375 }
1376
1377 static uint64_t vfs_gluster_get_alloc_size(struct vfs_handle_struct *handle,
1378                                            files_struct *fsp,
1379                                            const SMB_STRUCT_STAT *sbuf)
1380 {
1381         uint64_t ret;
1382
1383         START_PROFILE(syscall_get_alloc_size);
1384         ret = sbuf->st_ex_blocks * 512;
1385         END_PROFILE(syscall_get_alloc_size);
1386
1387         return ret;
1388 }
1389
1390 static int vfs_gluster_unlinkat(struct vfs_handle_struct *handle,
1391                         struct files_struct *dirfsp,
1392                         const struct smb_filename *smb_fname,
1393                         int flags)
1394 {
1395         int ret;
1396
1397         START_PROFILE(syscall_unlinkat);
1398         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
1399         if (flags & AT_REMOVEDIR) {
1400                 ret = glfs_rmdir(handle->data, smb_fname->base_name);
1401         } else {
1402                 ret = glfs_unlink(handle->data, smb_fname->base_name);
1403         }
1404         END_PROFILE(syscall_unlinkat);
1405
1406         return ret;
1407 }
1408
1409 static int vfs_gluster_chmod(struct vfs_handle_struct *handle,
1410                                 const struct smb_filename *smb_fname,
1411                                 mode_t mode)
1412 {
1413         int ret;
1414
1415         START_PROFILE(syscall_chmod);
1416         ret = glfs_chmod(handle->data, smb_fname->base_name, mode);
1417         END_PROFILE(syscall_chmod);
1418
1419         return ret;
1420 }
1421
1422 static int vfs_gluster_fchmod(struct vfs_handle_struct *handle,
1423                               files_struct *fsp, mode_t mode)
1424 {
1425         int ret;
1426         glfs_fd_t *glfd = NULL;
1427
1428         START_PROFILE(syscall_fchmod);
1429
1430         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1431         if (glfd == NULL) {
1432                 END_PROFILE(syscall_fchmod);
1433                 DBG_ERR("Failed to fetch gluster fd\n");
1434                 return -1;
1435         }
1436
1437         ret = glfs_fchmod(glfd, mode);
1438         END_PROFILE(syscall_fchmod);
1439
1440         return ret;
1441 }
1442
1443 static int vfs_gluster_fchown(struct vfs_handle_struct *handle,
1444                               files_struct *fsp, uid_t uid, gid_t gid)
1445 {
1446         int ret;
1447         glfs_fd_t *glfd = NULL;
1448
1449         START_PROFILE(syscall_fchown);
1450
1451         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1452         if (glfd == NULL) {
1453                 END_PROFILE(syscall_fchown);
1454                 DBG_ERR("Failed to fetch gluster fd\n");
1455                 return -1;
1456         }
1457
1458         ret = glfs_fchown(glfd, uid, gid);
1459         END_PROFILE(syscall_fchown);
1460
1461         return ret;
1462 }
1463
1464 static int vfs_gluster_lchown(struct vfs_handle_struct *handle,
1465                         const struct smb_filename *smb_fname,
1466                         uid_t uid,
1467                         gid_t gid)
1468 {
1469         int ret;
1470
1471         START_PROFILE(syscall_lchown);
1472         ret = glfs_lchown(handle->data, smb_fname->base_name, uid, gid);
1473         END_PROFILE(syscall_lchown);
1474
1475         return ret;
1476 }
1477
1478 static int vfs_gluster_chdir(struct vfs_handle_struct *handle,
1479                         const struct smb_filename *smb_fname)
1480 {
1481         int ret;
1482
1483         START_PROFILE(syscall_chdir);
1484         ret = glfs_chdir(handle->data, smb_fname->base_name);
1485         END_PROFILE(syscall_chdir);
1486
1487         return ret;
1488 }
1489
1490 static struct smb_filename *vfs_gluster_getwd(struct vfs_handle_struct *handle,
1491                                 TALLOC_CTX *ctx)
1492 {
1493         char *cwd;
1494         char *ret;
1495         struct smb_filename *smb_fname = NULL;
1496
1497         START_PROFILE(syscall_getwd);
1498
1499         cwd = SMB_CALLOC_ARRAY(char, PATH_MAX);
1500         if (cwd == NULL) {
1501                 END_PROFILE(syscall_getwd);
1502                 return NULL;
1503         }
1504
1505         ret = glfs_getcwd(handle->data, cwd, PATH_MAX - 1);
1506         END_PROFILE(syscall_getwd);
1507
1508         if (ret == NULL) {
1509                 SAFE_FREE(cwd);
1510                 return NULL;
1511         }
1512         smb_fname = synthetic_smb_fname(ctx,
1513                                         ret,
1514                                         NULL,
1515                                         NULL,
1516                                         0,
1517                                         0);
1518         SAFE_FREE(cwd);
1519         return smb_fname;
1520 }
1521
1522 static int vfs_gluster_ntimes(struct vfs_handle_struct *handle,
1523                               const struct smb_filename *smb_fname,
1524                               struct smb_file_time *ft)
1525 {
1526         int ret = -1;
1527         struct timespec times[2];
1528
1529         START_PROFILE(syscall_ntimes);
1530
1531         if (is_omit_timespec(&ft->atime)) {
1532                 times[0].tv_sec = smb_fname->st.st_ex_atime.tv_sec;
1533                 times[0].tv_nsec = smb_fname->st.st_ex_atime.tv_nsec;
1534         } else {
1535                 times[0].tv_sec = ft->atime.tv_sec;
1536                 times[0].tv_nsec = ft->atime.tv_nsec;
1537         }
1538
1539         if (is_omit_timespec(&ft->mtime)) {
1540                 times[1].tv_sec = smb_fname->st.st_ex_mtime.tv_sec;
1541                 times[1].tv_nsec = smb_fname->st.st_ex_mtime.tv_nsec;
1542         } else {
1543                 times[1].tv_sec = ft->mtime.tv_sec;
1544                 times[1].tv_nsec = ft->mtime.tv_nsec;
1545         }
1546
1547         if ((timespec_compare(&times[0],
1548                               &smb_fname->st.st_ex_atime) == 0) &&
1549             (timespec_compare(&times[1],
1550                               &smb_fname->st.st_ex_mtime) == 0)) {
1551                 END_PROFILE(syscall_ntimes);
1552                 return 0;
1553         }
1554
1555         ret = glfs_utimens(handle->data, smb_fname->base_name, times);
1556         END_PROFILE(syscall_ntimes);
1557
1558         return ret;
1559 }
1560
1561 static int vfs_gluster_ftruncate(struct vfs_handle_struct *handle,
1562                                  files_struct *fsp, off_t offset)
1563 {
1564         int ret;
1565         glfs_fd_t *glfd = NULL;
1566
1567         START_PROFILE(syscall_ftruncate);
1568
1569         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1570         if (glfd == NULL) {
1571                 END_PROFILE(syscall_ftruncate);
1572                 DBG_ERR("Failed to fetch gluster fd\n");
1573                 return -1;
1574         }
1575
1576 #ifdef HAVE_GFAPI_VER_7_6
1577         ret = glfs_ftruncate(glfd, offset, NULL, NULL);
1578 #else
1579         ret = glfs_ftruncate(glfd, offset);
1580 #endif
1581         END_PROFILE(syscall_ftruncate);
1582
1583         return ret;
1584 }
1585
1586 static int vfs_gluster_fallocate(struct vfs_handle_struct *handle,
1587                                  struct files_struct *fsp,
1588                                  uint32_t mode,
1589                                  off_t offset, off_t len)
1590 {
1591         int ret;
1592 #ifdef HAVE_GFAPI_VER_6
1593         glfs_fd_t *glfd = NULL;
1594         int keep_size, punch_hole;
1595
1596         START_PROFILE(syscall_fallocate);
1597
1598         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1599         if (glfd == NULL) {
1600                 END_PROFILE(syscall_fallocate);
1601                 DBG_ERR("Failed to fetch gluster fd\n");
1602                 return -1;
1603         }
1604
1605         keep_size = mode & VFS_FALLOCATE_FL_KEEP_SIZE;
1606         punch_hole = mode & VFS_FALLOCATE_FL_PUNCH_HOLE;
1607
1608         mode &= ~(VFS_FALLOCATE_FL_KEEP_SIZE|VFS_FALLOCATE_FL_PUNCH_HOLE);
1609         if (mode != 0) {
1610                 END_PROFILE(syscall_fallocate);
1611                 errno = ENOTSUP;
1612                 return -1;
1613         }
1614
1615         if (punch_hole) {
1616                 ret = glfs_discard(glfd, offset, len);
1617                 if (ret != 0) {
1618                         DBG_DEBUG("glfs_discard failed: %s\n",
1619                                   strerror(errno));
1620                 }
1621         }
1622
1623         ret = glfs_fallocate(glfd, keep_size, offset, len);
1624         END_PROFILE(syscall_fallocate);
1625 #else
1626         errno = ENOTSUP;
1627         ret = -1;
1628 #endif
1629         return ret;
1630 }
1631
1632 static struct smb_filename *vfs_gluster_realpath(struct vfs_handle_struct *handle,
1633                                 TALLOC_CTX *ctx,
1634                                 const struct smb_filename *smb_fname)
1635 {
1636         char *result = NULL;
1637         struct smb_filename *result_fname = NULL;
1638         char *resolved_path = NULL;
1639
1640         START_PROFILE(syscall_realpath);
1641
1642         resolved_path = SMB_MALLOC_ARRAY(char, PATH_MAX+1);
1643         if (resolved_path == NULL) {
1644                 END_PROFILE(syscall_realpath);
1645                 errno = ENOMEM;
1646                 return NULL;
1647         }
1648
1649         result = glfs_realpath(handle->data,
1650                         smb_fname->base_name,
1651                         resolved_path);
1652         if (result != NULL) {
1653                 result_fname = synthetic_smb_fname(ctx,
1654                                                    result,
1655                                                    NULL,
1656                                                    NULL,
1657                                                    0,
1658                                                    0);
1659         }
1660
1661         SAFE_FREE(resolved_path);
1662         END_PROFILE(syscall_realpath);
1663
1664         return result_fname;
1665 }
1666
1667 static bool vfs_gluster_lock(struct vfs_handle_struct *handle,
1668                              files_struct *fsp, int op, off_t offset,
1669                              off_t count, int type)
1670 {
1671         struct flock flock = { 0, };
1672         int ret;
1673         glfs_fd_t *glfd = NULL;
1674         bool ok = false;
1675
1676         START_PROFILE(syscall_fcntl_lock);
1677
1678         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1679         if (glfd == NULL) {
1680                 DBG_ERR("Failed to fetch gluster fd\n");
1681                 ok = false;
1682                 goto out;
1683         }
1684
1685         flock.l_type = type;
1686         flock.l_whence = SEEK_SET;
1687         flock.l_start = offset;
1688         flock.l_len = count;
1689         flock.l_pid = 0;
1690
1691         ret = glfs_posix_lock(glfd, op, &flock);
1692
1693         if (op == F_GETLK) {
1694                 /* lock query, true if someone else has locked */
1695                 if ((ret != -1) &&
1696                     (flock.l_type != F_UNLCK) &&
1697                     (flock.l_pid != 0) && (flock.l_pid != getpid())) {
1698                         ok = true;
1699                         goto out;
1700                 }
1701                 /* not me */
1702                 ok = false;
1703                 goto out;
1704         }
1705
1706         if (ret == -1) {
1707                 ok = false;
1708                 goto out;
1709         }
1710
1711         ok = true;
1712 out:
1713         END_PROFILE(syscall_fcntl_lock);
1714
1715         return ok;
1716 }
1717
1718 static int vfs_gluster_kernel_flock(struct vfs_handle_struct *handle,
1719                                     files_struct *fsp, uint32_t share_access,
1720                                     uint32_t access_mask)
1721 {
1722         errno = ENOSYS;
1723         return -1;
1724 }
1725
1726 static int vfs_gluster_fcntl(vfs_handle_struct *handle,
1727                              files_struct *fsp, int cmd, va_list cmd_arg)
1728 {
1729         /*
1730          * SMB_VFS_FCNTL() is currently only called by vfs_set_blocking() to
1731          * clear O_NONBLOCK, etc for LOCK_MAND and FIFOs. Ignore it.
1732          */
1733         if (cmd == F_GETFL) {
1734                 return 0;
1735         } else if (cmd == F_SETFL) {
1736                 va_list dup_cmd_arg;
1737                 int opt;
1738
1739                 va_copy(dup_cmd_arg, cmd_arg);
1740                 opt = va_arg(dup_cmd_arg, int);
1741                 va_end(dup_cmd_arg);
1742                 if (opt == 0) {
1743                         return 0;
1744                 }
1745                 DBG_ERR("unexpected fcntl SETFL(%d)\n", opt);
1746                 goto err_out;
1747         }
1748         DBG_ERR("unexpected fcntl: %d\n", cmd);
1749 err_out:
1750         errno = EINVAL;
1751         return -1;
1752 }
1753
1754 static int vfs_gluster_linux_setlease(struct vfs_handle_struct *handle,
1755                                       files_struct *fsp, int leasetype)
1756 {
1757         errno = ENOSYS;
1758         return -1;
1759 }
1760
1761 static bool vfs_gluster_getlock(struct vfs_handle_struct *handle,
1762                                 files_struct *fsp, off_t *poffset,
1763                                 off_t *pcount, int *ptype, pid_t *ppid)
1764 {
1765         struct flock flock = { 0, };
1766         int ret;
1767         glfs_fd_t *glfd = NULL;
1768
1769         START_PROFILE(syscall_fcntl_getlock);
1770
1771         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1772         if (glfd == NULL) {
1773                 END_PROFILE(syscall_fcntl_getlock);
1774                 DBG_ERR("Failed to fetch gluster fd\n");
1775                 return false;
1776         }
1777
1778         flock.l_type = *ptype;
1779         flock.l_whence = SEEK_SET;
1780         flock.l_start = *poffset;
1781         flock.l_len = *pcount;
1782         flock.l_pid = 0;
1783
1784         ret = glfs_posix_lock(glfd, F_GETLK, &flock);
1785
1786         if (ret == -1) {
1787                 END_PROFILE(syscall_fcntl_getlock);
1788                 return false;
1789         }
1790
1791         *ptype = flock.l_type;
1792         *poffset = flock.l_start;
1793         *pcount = flock.l_len;
1794         *ppid = flock.l_pid;
1795         END_PROFILE(syscall_fcntl_getlock);
1796
1797         return true;
1798 }
1799
1800 static int vfs_gluster_symlinkat(struct vfs_handle_struct *handle,
1801                                 const struct smb_filename *link_target,
1802                                 struct files_struct *dirfsp,
1803                                 const struct smb_filename *new_smb_fname)
1804 {
1805         int ret;
1806
1807         START_PROFILE(syscall_symlinkat);
1808         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
1809         ret = glfs_symlink(handle->data,
1810                         link_target->base_name,
1811                         new_smb_fname->base_name);
1812         END_PROFILE(syscall_symlinkat);
1813
1814         return ret;
1815 }
1816
1817 static int vfs_gluster_readlinkat(struct vfs_handle_struct *handle,
1818                                 const struct files_struct *dirfsp,
1819                                 const struct smb_filename *smb_fname,
1820                                 char *buf,
1821                                 size_t bufsiz)
1822 {
1823         int ret;
1824
1825         START_PROFILE(syscall_readlinkat);
1826         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
1827         ret = glfs_readlink(handle->data, smb_fname->base_name, buf, bufsiz);
1828         END_PROFILE(syscall_readlinkat);
1829
1830         return ret;
1831 }
1832
1833 static int vfs_gluster_linkat(struct vfs_handle_struct *handle,
1834                                 files_struct *srcfsp,
1835                                 const struct smb_filename *old_smb_fname,
1836                                 files_struct *dstfsp,
1837                                 const struct smb_filename *new_smb_fname,
1838                                 int flags)
1839 {
1840         int ret;
1841
1842         START_PROFILE(syscall_linkat);
1843
1844         SMB_ASSERT(srcfsp == srcfsp->conn->cwd_fsp);
1845         SMB_ASSERT(dstfsp == dstfsp->conn->cwd_fsp);
1846
1847         ret = glfs_link(handle->data,
1848                         old_smb_fname->base_name,
1849                         new_smb_fname->base_name);
1850         END_PROFILE(syscall_linkat);
1851
1852         return ret;
1853 }
1854
1855 static int vfs_gluster_mknodat(struct vfs_handle_struct *handle,
1856                                 files_struct *dirfsp,
1857                                 const struct smb_filename *smb_fname,
1858                                 mode_t mode,
1859                                 SMB_DEV_T dev)
1860 {
1861         int ret;
1862
1863         START_PROFILE(syscall_mknodat);
1864         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
1865         ret = glfs_mknod(handle->data, smb_fname->base_name, mode, dev);
1866         END_PROFILE(syscall_mknodat);
1867
1868         return ret;
1869 }
1870
1871 static int vfs_gluster_chflags(struct vfs_handle_struct *handle,
1872                                 const struct smb_filename *smb_fname,
1873                                 unsigned int flags)
1874 {
1875         errno = ENOSYS;
1876         return -1;
1877 }
1878
1879 static int vfs_gluster_get_real_filename(struct vfs_handle_struct *handle,
1880                                          const struct smb_filename *path,
1881                                          const char *name,
1882                                          TALLOC_CTX *mem_ctx,
1883                                          char **found_name)
1884 {
1885         int ret;
1886         char key_buf[GLUSTER_NAME_MAX + 64];
1887         char val_buf[GLUSTER_NAME_MAX + 1];
1888
1889         if (strlen(name) >= GLUSTER_NAME_MAX) {
1890                 errno = ENAMETOOLONG;
1891                 return -1;
1892         }
1893
1894         snprintf(key_buf, GLUSTER_NAME_MAX + 64,
1895                  "glusterfs.get_real_filename:%s", name);
1896
1897         ret = glfs_getxattr(handle->data, path->base_name, key_buf, val_buf,
1898                             GLUSTER_NAME_MAX + 1);
1899         if (ret == -1) {
1900                 if (errno == ENOATTR) {
1901                         errno = ENOENT;
1902                 }
1903                 return -1;
1904         }
1905
1906         *found_name = talloc_strdup(mem_ctx, val_buf);
1907         if (found_name[0] == NULL) {
1908                 errno = ENOMEM;
1909                 return -1;
1910         }
1911         return 0;
1912 }
1913
1914 static const char *vfs_gluster_connectpath(struct vfs_handle_struct *handle,
1915                                 const struct smb_filename *smb_fname)
1916 {
1917         return handle->conn->connectpath;
1918 }
1919
1920 /* EA Operations */
1921
1922 static ssize_t vfs_gluster_getxattr(struct vfs_handle_struct *handle,
1923                                 const struct smb_filename *smb_fname,
1924                                 const char *name,
1925                                 void *value,
1926                                 size_t size)
1927 {
1928         return glfs_getxattr(handle->data, smb_fname->base_name,
1929                              name, value, size);
1930 }
1931
1932 static ssize_t vfs_gluster_fgetxattr(struct vfs_handle_struct *handle,
1933                                      files_struct *fsp, const char *name,
1934                                      void *value, size_t size)
1935 {
1936         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1937         if (glfd == NULL) {
1938                 DBG_ERR("Failed to fetch gluster fd\n");
1939                 return -1;
1940         }
1941
1942         return glfs_fgetxattr(glfd, name, value, size);
1943 }
1944
1945 static ssize_t vfs_gluster_listxattr(struct vfs_handle_struct *handle,
1946                                 const struct smb_filename *smb_fname,
1947                                 char *list,
1948                                 size_t size)
1949 {
1950         return glfs_listxattr(handle->data, smb_fname->base_name, list, size);
1951 }
1952
1953 static ssize_t vfs_gluster_flistxattr(struct vfs_handle_struct *handle,
1954                                       files_struct *fsp, char *list,
1955                                       size_t size)
1956 {
1957         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1958         if (glfd == NULL) {
1959                 DBG_ERR("Failed to fetch gluster fd\n");
1960                 return -1;
1961         }
1962
1963         return glfs_flistxattr(glfd, list, size);
1964 }
1965
1966 static int vfs_gluster_removexattr(struct vfs_handle_struct *handle,
1967                                 const struct smb_filename *smb_fname,
1968                                 const char *name)
1969 {
1970         return glfs_removexattr(handle->data, smb_fname->base_name, name);
1971 }
1972
1973 static int vfs_gluster_fremovexattr(struct vfs_handle_struct *handle,
1974                                     files_struct *fsp, const char *name)
1975 {
1976         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1977         if (glfd == NULL) {
1978                 DBG_ERR("Failed to fetch gluster fd\n");
1979                 return -1;
1980         }
1981
1982         return glfs_fremovexattr(glfd, name);
1983 }
1984
1985 static int vfs_gluster_setxattr(struct vfs_handle_struct *handle,
1986                                 const struct smb_filename *smb_fname,
1987                                 const char *name,
1988                                 const void *value, size_t size, int flags)
1989 {
1990         return glfs_setxattr(handle->data, smb_fname->base_name, name, value, size, flags);
1991 }
1992
1993 static int vfs_gluster_fsetxattr(struct vfs_handle_struct *handle,
1994                                  files_struct *fsp, const char *name,
1995                                  const void *value, size_t size, int flags)
1996 {
1997         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1998         if (glfd == NULL) {
1999                 DBG_ERR("Failed to fetch gluster fd\n");
2000                 return -1;
2001         }
2002
2003         return glfs_fsetxattr(glfd, name, value, size, flags);
2004 }
2005
2006 /* AIO Operations */
2007
2008 static bool vfs_gluster_aio_force(struct vfs_handle_struct *handle,
2009                                   files_struct *fsp)
2010 {
2011         return false;
2012 }
2013
2014 static NTSTATUS vfs_gluster_create_dfs_pathat(struct vfs_handle_struct *handle,
2015                                 struct files_struct *dirfsp,
2016                                 const struct smb_filename *smb_fname,
2017                                 const struct referral *reflist,
2018                                 size_t referral_count)
2019 {
2020         TALLOC_CTX *frame = talloc_stackframe();
2021         NTSTATUS status = NT_STATUS_NO_MEMORY;
2022         int ret;
2023         char *msdfs_link = NULL;
2024
2025         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
2026
2027         /* Form the msdfs_link contents */
2028         msdfs_link = msdfs_link_string(frame,
2029                                         reflist,
2030                                         referral_count);
2031         if (msdfs_link == NULL) {
2032                 goto out;
2033         }
2034
2035         ret = glfs_symlink(handle->data,
2036                         msdfs_link,
2037                         smb_fname->base_name);
2038         if (ret == 0) {
2039                 status = NT_STATUS_OK;
2040         } else {
2041                 status = map_nt_error_from_unix(errno);
2042         }
2043
2044   out:
2045
2046         TALLOC_FREE(frame);
2047         return status;
2048 }
2049
2050 /*
2051  * Read and return the contents of a DFS redirect given a
2052  * pathname. A caller can pass in NULL for ppreflist and
2053  * preferral_count but still determine if this was a
2054  * DFS redirect point by getting NT_STATUS_OK back
2055  * without incurring the overhead of reading and parsing
2056  * the referral contents.
2057  */
2058
2059 static NTSTATUS vfs_gluster_read_dfs_pathat(struct vfs_handle_struct *handle,
2060                                 TALLOC_CTX *mem_ctx,
2061                                 struct files_struct *dirfsp,
2062                                 struct smb_filename *smb_fname,
2063                                 struct referral **ppreflist,
2064                                 size_t *preferral_count)
2065 {
2066         NTSTATUS status = NT_STATUS_NO_MEMORY;
2067         size_t bufsize;
2068         char *link_target = NULL;
2069         int referral_len;
2070         bool ok;
2071 #if defined(HAVE_BROKEN_READLINK)
2072         char link_target_buf[PATH_MAX];
2073 #else
2074         char link_target_buf[7];
2075 #endif
2076         struct stat st;
2077         int ret;
2078
2079         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
2080
2081         if (is_named_stream(smb_fname)) {
2082                 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
2083                 goto err;
2084         }
2085
2086         if (ppreflist == NULL && preferral_count == NULL) {
2087                 /*
2088                  * We're only checking if this is a DFS
2089                  * redirect. We don't need to return data.
2090                  */
2091                 bufsize = sizeof(link_target_buf);
2092                 link_target = link_target_buf;
2093         } else {
2094                 bufsize = PATH_MAX;
2095                 link_target = talloc_array(mem_ctx, char, bufsize);
2096                 if (!link_target) {
2097                         goto err;
2098                 }
2099         }
2100
2101         ret = glfs_lstat(handle->data, smb_fname->base_name, &st);
2102         if (ret < 0) {
2103                 status = map_nt_error_from_unix(errno);
2104                 goto err;
2105         }
2106
2107         referral_len = glfs_readlink(handle->data,
2108                                 smb_fname->base_name,
2109                                 link_target,
2110                                 bufsize - 1);
2111         if (referral_len < 0) {
2112                 if (errno == EINVAL) {
2113                         DBG_INFO("%s is not a link.\n", smb_fname->base_name);
2114                         status = NT_STATUS_OBJECT_TYPE_MISMATCH;
2115                 } else {
2116                         status = map_nt_error_from_unix(errno);
2117                         DBG_ERR("Error reading "
2118                                 "msdfs link %s: %s\n",
2119                                 smb_fname->base_name,
2120                                 strerror(errno));
2121                 }
2122                 goto err;
2123         }
2124         link_target[referral_len] = '\0';
2125
2126         DBG_INFO("%s -> %s\n",
2127                         smb_fname->base_name,
2128                         link_target);
2129
2130         if (!strnequal(link_target, "msdfs:", 6)) {
2131                 status = NT_STATUS_OBJECT_TYPE_MISMATCH;
2132                 goto err;
2133         }
2134
2135         if (ppreflist == NULL && preferral_count == NULL) {
2136                 /* Early return for checking if this is a DFS link. */
2137                 smb_stat_ex_from_stat(&smb_fname->st, &st);
2138                 return NT_STATUS_OK;
2139         }
2140
2141         ok = parse_msdfs_symlink(mem_ctx,
2142                         lp_msdfs_shuffle_referrals(SNUM(handle->conn)),
2143                         link_target,
2144                         ppreflist,
2145                         preferral_count);
2146
2147         if (ok) {
2148                 smb_stat_ex_from_stat(&smb_fname->st, &st);
2149                 status = NT_STATUS_OK;
2150         } else {
2151                 status = NT_STATUS_NO_MEMORY;
2152         }
2153
2154   err:
2155
2156         if (link_target != link_target_buf) {
2157                 TALLOC_FREE(link_target);
2158         }
2159         return status;
2160 }
2161
2162 static struct vfs_fn_pointers glusterfs_fns = {
2163
2164         /* Disk Operations */
2165
2166         .connect_fn = vfs_gluster_connect,
2167         .disconnect_fn = vfs_gluster_disconnect,
2168         .disk_free_fn = vfs_gluster_disk_free,
2169         .get_quota_fn = vfs_gluster_get_quota,
2170         .set_quota_fn = vfs_gluster_set_quota,
2171         .statvfs_fn = vfs_gluster_statvfs,
2172         .fs_capabilities_fn = vfs_gluster_fs_capabilities,
2173
2174         .get_dfs_referrals_fn = NULL,
2175
2176         /* Directory Operations */
2177
2178         .fdopendir_fn = vfs_gluster_fdopendir,
2179         .readdir_fn = vfs_gluster_readdir,
2180         .seekdir_fn = vfs_gluster_seekdir,
2181         .telldir_fn = vfs_gluster_telldir,
2182         .rewind_dir_fn = vfs_gluster_rewinddir,
2183         .mkdirat_fn = vfs_gluster_mkdirat,
2184         .closedir_fn = vfs_gluster_closedir,
2185
2186         /* File Operations */
2187
2188         .openat_fn = vfs_gluster_openat,
2189         .create_file_fn = NULL,
2190         .close_fn = vfs_gluster_close,
2191         .pread_fn = vfs_gluster_pread,
2192         .pread_send_fn = vfs_gluster_pread_send,
2193         .pread_recv_fn = vfs_gluster_pread_recv,
2194         .pwrite_fn = vfs_gluster_pwrite,
2195         .pwrite_send_fn = vfs_gluster_pwrite_send,
2196         .pwrite_recv_fn = vfs_gluster_pwrite_recv,
2197         .lseek_fn = vfs_gluster_lseek,
2198         .sendfile_fn = vfs_gluster_sendfile,
2199         .recvfile_fn = vfs_gluster_recvfile,
2200         .renameat_fn = vfs_gluster_renameat,
2201         .fsync_send_fn = vfs_gluster_fsync_send,
2202         .fsync_recv_fn = vfs_gluster_fsync_recv,
2203
2204         .stat_fn = vfs_gluster_stat,
2205         .fstat_fn = vfs_gluster_fstat,
2206         .lstat_fn = vfs_gluster_lstat,
2207         .get_alloc_size_fn = vfs_gluster_get_alloc_size,
2208         .unlinkat_fn = vfs_gluster_unlinkat,
2209
2210         .chmod_fn = vfs_gluster_chmod,
2211         .fchmod_fn = vfs_gluster_fchmod,
2212         .fchown_fn = vfs_gluster_fchown,
2213         .lchown_fn = vfs_gluster_lchown,
2214         .chdir_fn = vfs_gluster_chdir,
2215         .getwd_fn = vfs_gluster_getwd,
2216         .ntimes_fn = vfs_gluster_ntimes,
2217         .ftruncate_fn = vfs_gluster_ftruncate,
2218         .fallocate_fn = vfs_gluster_fallocate,
2219         .lock_fn = vfs_gluster_lock,
2220         .kernel_flock_fn = vfs_gluster_kernel_flock,
2221         .fcntl_fn = vfs_gluster_fcntl,
2222         .linux_setlease_fn = vfs_gluster_linux_setlease,
2223         .getlock_fn = vfs_gluster_getlock,
2224         .symlinkat_fn = vfs_gluster_symlinkat,
2225         .readlinkat_fn = vfs_gluster_readlinkat,
2226         .linkat_fn = vfs_gluster_linkat,
2227         .mknodat_fn = vfs_gluster_mknodat,
2228         .realpath_fn = vfs_gluster_realpath,
2229         .chflags_fn = vfs_gluster_chflags,
2230         .file_id_create_fn = NULL,
2231         .streaminfo_fn = NULL,
2232         .get_real_filename_fn = vfs_gluster_get_real_filename,
2233         .connectpath_fn = vfs_gluster_connectpath,
2234         .create_dfs_pathat_fn = vfs_gluster_create_dfs_pathat,
2235         .read_dfs_pathat_fn = vfs_gluster_read_dfs_pathat,
2236
2237         .brl_lock_windows_fn = NULL,
2238         .brl_unlock_windows_fn = NULL,
2239         .strict_lock_check_fn = NULL,
2240         .translate_name_fn = NULL,
2241         .fsctl_fn = NULL,
2242
2243         /* NT ACL Operations */
2244         .fget_nt_acl_fn = NULL,
2245         .get_nt_acl_at_fn = NULL,
2246         .fset_nt_acl_fn = NULL,
2247         .audit_file_fn = NULL,
2248
2249         /* Posix ACL Operations */
2250         .sys_acl_get_file_fn = posixacl_xattr_acl_get_file,
2251         .sys_acl_get_fd_fn = posixacl_xattr_acl_get_fd,
2252         .sys_acl_blob_get_file_fn = posix_sys_acl_blob_get_file,
2253         .sys_acl_blob_get_fd_fn = posix_sys_acl_blob_get_fd,
2254         .sys_acl_set_file_fn = posixacl_xattr_acl_set_file,
2255         .sys_acl_set_fd_fn = posixacl_xattr_acl_set_fd,
2256         .sys_acl_delete_def_file_fn = posixacl_xattr_acl_delete_def_file,
2257
2258         /* EA Operations */
2259         .getxattr_fn = vfs_gluster_getxattr,
2260         .getxattrat_send_fn = vfs_not_implemented_getxattrat_send,
2261         .getxattrat_recv_fn = vfs_not_implemented_getxattrat_recv,
2262         .fgetxattr_fn = vfs_gluster_fgetxattr,
2263         .listxattr_fn = vfs_gluster_listxattr,
2264         .flistxattr_fn = vfs_gluster_flistxattr,
2265         .removexattr_fn = vfs_gluster_removexattr,
2266         .fremovexattr_fn = vfs_gluster_fremovexattr,
2267         .setxattr_fn = vfs_gluster_setxattr,
2268         .fsetxattr_fn = vfs_gluster_fsetxattr,
2269
2270         /* AIO Operations */
2271         .aio_force_fn = vfs_gluster_aio_force,
2272
2273         /* Durable handle Operations */
2274         .durable_cookie_fn = NULL,
2275         .durable_disconnect_fn = NULL,
2276         .durable_reconnect_fn = NULL,
2277 };
2278
2279 static_decl_vfs;
2280 NTSTATUS vfs_glusterfs_init(TALLOC_CTX *ctx)
2281 {
2282         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
2283                                 "glusterfs", &glusterfs_fns);
2284 }