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                                           struct files_struct *dirfsp,
 654                                           DIR *dirp,
 655                                           SMB_STRUCT_STAT *sbuf)
 656 {
 657         static char direntbuf[512];
 658         int ret;
 659         struct stat stat;
 660         struct dirent *dirent = 0;
 661
 662         START_PROFILE(syscall_readdir);
 663         if (sbuf != NULL) {
 664                 ret = glfs_readdirplus_r((void *)dirp, &stat, (void *)direntbuf,
 665                                          &dirent);
 666         } else {
 667                 ret = glfs_readdir_r((void *)dirp, (void *)direntbuf, &dirent);
 668         }
 669
 670         if ((ret < 0) || (dirent == NULL)) {
 671                 END_PROFILE(syscall_readdir);
 672                 return NULL;
 673         }
 674
 675         if (sbuf != NULL) {
 676                 SET_STAT_INVALID(*sbuf);
 677                 if (!S_ISLNK(stat.st_mode)) {
 678                         smb_stat_ex_from_stat(sbuf, &stat);
 679                 }
 680         }
 681
 682         END_PROFILE(syscall_readdir);
 683         return dirent;
 684 }
 685
 686 static long vfs_gluster_telldir(struct vfs_handle_struct *handle, DIR *dirp)
 687 {
 688         long ret;
 689
 690         START_PROFILE(syscall_telldir);
 691         ret = glfs_telldir((void *)dirp);
 692         END_PROFILE(syscall_telldir);
 693
 694         return ret;
 695 }
 696
 697 static void vfs_gluster_seekdir(struct vfs_handle_struct *handle, DIR *dirp,
 698                                 long offset)
 699 {
 700         START_PROFILE(syscall_seekdir);
 701         glfs_seekdir((void *)dirp, offset);
 702         END_PROFILE(syscall_seekdir);
 703 }
 704
 705 static void vfs_gluster_rewinddir(struct vfs_handle_struct *handle, DIR *dirp)
 706 {
 707         START_PROFILE(syscall_rewinddir);
 708         glfs_seekdir((void *)dirp, 0);
 709         END_PROFILE(syscall_rewinddir);
 710 }
 711
 712 static int vfs_gluster_mkdirat(struct vfs_handle_struct *handle,
 713                         struct files_struct *dirfsp,
 714                         const struct smb_filename *smb_fname,
 715                         mode_t mode)
 716 {
 717         struct smb_filename *full_fname = NULL;
 718         int ret;
 719
 720         START_PROFILE(syscall_mkdirat);
 721
 722         full_fname = full_path_from_dirfsp_atname(talloc_tos(),
 723                                                   dirfsp,
 724                                                   smb_fname);
 725         if (full_fname == NULL) {
 726                 return -1;
 727         }
 728
 729         ret = glfs_mkdir(handle->data, full_fname->base_name, mode);
 730
 731         TALLOC_FREE(full_fname);
 732
 733         END_PROFILE(syscall_mkdirat);
 734
 735         return ret;
 736 }
 737
 738 static int vfs_gluster_openat(struct vfs_handle_struct *handle,
 739                               const struct files_struct *dirfsp,
 740                               const struct smb_filename *smb_fname,
 741                               files_struct *fsp,
 742                               int flags,
 743                               mode_t mode)
 744 {
 745         bool became_root = false;
 746         glfs_fd_t *glfd;
 747         glfs_fd_t **p_tmp;
 748
 749         START_PROFILE(syscall_openat);
 750
 751         /*
 752          * Looks like glfs API doesn't have openat().
 753          */
 754         SMB_ASSERT(fsp_get_pathref_fd(dirfsp) == AT_FDCWD);
 755
 756         p_tmp = VFS_ADD_FSP_EXTENSION(handle, fsp, glfs_fd_t *, NULL);
 757         if (p_tmp == NULL) {
 758                 END_PROFILE(syscall_openat);
 759                 errno = ENOMEM;
 760                 return -1;
 761         }
 762
 763         if (fsp->fsp_flags.is_pathref) {
 764                 /*
 765                  * ceph doesn't support O_PATH so we have to fallback to
 766                  * become_root().
 767                  */
 768                 become_root();
 769                 became_root = true;
 770         }
 771
 772         if (flags & O_DIRECTORY) {
 773                 glfd = glfs_opendir(handle->data, smb_fname->base_name);
 774         } else if (flags & O_CREAT) {
 775                 glfd = glfs_creat(handle->data, smb_fname->base_name, flags,
 776                                   mode);
 777         } else {
 778                 glfd = glfs_open(handle->data, smb_fname->base_name, flags);
 779         }
 780
 781         if (became_root) {
 782                 unbecome_root();
 783         }
 784
 785         fsp->fsp_flags.have_proc_fds = false;
 786
 787         if (glfd == NULL) {
 788                 END_PROFILE(syscall_openat);
 789                 /* no extension destroy_fn, so no need to save errno */
 790                 VFS_REMOVE_FSP_EXTENSION(handle, fsp);
 791                 return -1;
 792         }
 793
 794         *p_tmp = glfd;
 795
 796         END_PROFILE(syscall_openat);
 797         /* An arbitrary value for error reporting, so you know its us. */
 798         return 13371337;
 799 }
 800
 801 static int vfs_gluster_close(struct vfs_handle_struct *handle,
 802                              files_struct *fsp)
 803 {
 804         int ret;
 805         glfs_fd_t *glfd = NULL;
 806
 807         START_PROFILE(syscall_close);
 808
 809         glfd = vfs_gluster_fetch_glfd(handle, fsp);
 810         if (glfd == NULL) {
 811                 END_PROFILE(syscall_close);
 812                 DBG_ERR("Failed to fetch gluster fd\n");
 813                 return -1;
 814         }
 815
 816         VFS_REMOVE_FSP_EXTENSION(handle, fsp);
 817
 818         ret = glfs_close(glfd);
 819         END_PROFILE(syscall_close);
 820
 821         return ret;
 822 }
 823
 824 static ssize_t vfs_gluster_pread(struct vfs_handle_struct *handle,
 825                                  files_struct *fsp, void *data, size_t n,
 826                                  off_t offset)
 827 {
 828         ssize_t ret;
 829         glfs_fd_t *glfd = NULL;
 830
 831         START_PROFILE_BYTES(syscall_pread, n);
 832
 833         glfd = vfs_gluster_fetch_glfd(handle, fsp);
 834         if (glfd == NULL) {
 835                 END_PROFILE_BYTES(syscall_pread);
 836                 DBG_ERR("Failed to fetch gluster fd\n");
 837                 return -1;
 838         }
 839
 840 #ifdef HAVE_GFAPI_VER_7_6
 841         ret = glfs_pread(glfd, data, n, offset, 0, NULL);
 842 #else
 843         ret = glfs_pread(glfd, data, n, offset, 0);
 844 #endif
 845         END_PROFILE_BYTES(syscall_pread);
 846
 847         return ret;
 848 }
 849
 850 struct vfs_gluster_pread_state {
 851         ssize_t ret;
 852         glfs_fd_t *fd;
 853         void *buf;
 854         size_t count;
 855         off_t offset;
 856
 857         struct vfs_aio_state vfs_aio_state;
 858         SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
 859 };
 860
 861 static void vfs_gluster_pread_do(void *private_data);
 862 static void vfs_gluster_pread_done(struct tevent_req *subreq);
 863 static int vfs_gluster_pread_state_destructor(struct vfs_gluster_pread_state *state);
 864
 865 static struct tevent_req *vfs_gluster_pread_send(struct vfs_handle_struct
 866                                                   *handle, TALLOC_CTX *mem_ctx,
 867                                                   struct tevent_context *ev,
 868                                                   files_struct *fsp,
 869                                                   void *data, size_t n,
 870                                                   off_t offset)
 871 {
 872         struct vfs_gluster_pread_state *state;
 873         struct tevent_req *req, *subreq;
 874
 875         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
 876         if (glfd == NULL) {
 877                 DBG_ERR("Failed to fetch gluster fd\n");
 878                 return NULL;
 879         }
 880
 881         req = tevent_req_create(mem_ctx, &state, struct vfs_gluster_pread_state);
 882         if (req == NULL) {
 883                 return NULL;
 884         }
 885
 886         state->ret = -1;
 887         state->fd = glfd;
 888         state->buf = data;
 889         state->count = n;
 890         state->offset = offset;
 891
 892         SMBPROFILE_BYTES_ASYNC_START(syscall_asys_pread, profile_p,
 893                                      state->profile_bytes, n);
 894         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
 895
 896         subreq = pthreadpool_tevent_job_send(
 897                 state, ev, handle->conn->sconn->pool,
 898                 vfs_gluster_pread_do, state);
 899         if (tevent_req_nomem(subreq, req)) {
 900                 return tevent_req_post(req, ev);
 901         }
 902         tevent_req_set_callback(subreq, vfs_gluster_pread_done, req);
 903
 904         talloc_set_destructor(state, vfs_gluster_pread_state_destructor);
 905
 906         return req;
 907 }
 908
 909 static void vfs_gluster_pread_do(void *private_data)
 910 {
 911         struct vfs_gluster_pread_state *state = talloc_get_type_abort(
 912                 private_data, struct vfs_gluster_pread_state);
 913         struct timespec start_time;
 914         struct timespec end_time;
 915
 916         SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
 917
 918         PROFILE_TIMESTAMP(&start_time);
 919
 920         do {
 921 #ifdef HAVE_GFAPI_VER_7_6
 922                 state->ret = glfs_pread(state->fd, state->buf, state->count,
 923                                         state->offset, 0, NULL);
 924 #else
 925                 state->ret = glfs_pread(state->fd, state->buf, state->count,
 926                                         state->offset, 0);
 927 #endif
 928         } while ((state->ret == -1) && (errno == EINTR));
 929
 930         if (state->ret == -1) {
 931                 state->vfs_aio_state.error = errno;
 932         }
 933
 934         PROFILE_TIMESTAMP(&end_time);
 935
 936         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
 937
 938         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
 939 }
 940
 941 static int vfs_gluster_pread_state_destructor(struct vfs_gluster_pread_state *state)
 942 {
 943         return -1;
 944 }
 945
 946 static void vfs_gluster_pread_done(struct tevent_req *subreq)
 947 {
 948         struct tevent_req *req = tevent_req_callback_data(
 949                 subreq, struct tevent_req);
 950         struct vfs_gluster_pread_state *state = tevent_req_data(
 951                 req, struct vfs_gluster_pread_state);
 952         int ret;
 953
 954         ret = pthreadpool_tevent_job_recv(subreq);
 955         TALLOC_FREE(subreq);
 956         SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
 957         talloc_set_destructor(state, NULL);
 958         if (ret != 0) {
 959                 if (ret != EAGAIN) {
 960                         tevent_req_error(req, ret);
 961                         return;
 962                 }
 963                 /*
 964                  * If we get EAGAIN from pthreadpool_tevent_job_recv() this
 965                  * means the lower level pthreadpool failed to create a new
 966                  * thread. Fallback to sync processing in that case to allow
 967                  * some progress for the client.
 968                  */
 969                 vfs_gluster_pread_do(state);
 970         }
 971
 972         tevent_req_done(req);
 973 }
 974
 975 static ssize_t vfs_gluster_pread_recv(struct tevent_req *req,
 976                                       struct vfs_aio_state *vfs_aio_state)
 977 {
 978         struct vfs_gluster_pread_state *state = tevent_req_data(
 979                 req, struct vfs_gluster_pread_state);
 980
 981         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
 982                 return -1;
 983         }
 984
 985         *vfs_aio_state = state->vfs_aio_state;
 986         return state->ret;
 987 }
 988
 989 struct vfs_gluster_pwrite_state {
 990         ssize_t ret;
 991         glfs_fd_t *fd;
 992         const void *buf;
 993         size_t count;
 994         off_t offset;
 995
 996         struct vfs_aio_state vfs_aio_state;
 997         SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
 998 };
 999
1000 static void vfs_gluster_pwrite_do(void *private_data);
1001 static void vfs_gluster_pwrite_done(struct tevent_req *subreq);
1002 static int vfs_gluster_pwrite_state_destructor(struct vfs_gluster_pwrite_state *state);
1003
1004 static struct tevent_req *vfs_gluster_pwrite_send(struct vfs_handle_struct
1005                                                   *handle, TALLOC_CTX *mem_ctx,
1006                                                   struct tevent_context *ev,
1007                                                   files_struct *fsp,
1008                                                   const void *data, size_t n,
1009                                                   off_t offset)
1010 {
1011         struct tevent_req *req, *subreq;
1012         struct vfs_gluster_pwrite_state *state;
1013
1014         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1015         if (glfd == NULL) {
1016                 DBG_ERR("Failed to fetch gluster fd\n");
1017                 return NULL;
1018         }
1019
1020         req = tevent_req_create(mem_ctx, &state, struct vfs_gluster_pwrite_state);
1021         if (req == NULL) {
1022                 return NULL;
1023         }
1024
1025         state->ret = -1;
1026         state->fd = glfd;
1027         state->buf = data;
1028         state->count = n;
1029         state->offset = offset;
1030
1031         SMBPROFILE_BYTES_ASYNC_START(syscall_asys_pwrite, profile_p,
1032                                      state->profile_bytes, n);
1033         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
1034
1035         subreq = pthreadpool_tevent_job_send(
1036                 state, ev, handle->conn->sconn->pool,
1037                 vfs_gluster_pwrite_do, state);
1038         if (tevent_req_nomem(subreq, req)) {
1039                 return tevent_req_post(req, ev);
1040         }
1041         tevent_req_set_callback(subreq, vfs_gluster_pwrite_done, req);
1042
1043         talloc_set_destructor(state, vfs_gluster_pwrite_state_destructor);
1044
1045         return req;
1046 }
1047
1048 static void vfs_gluster_pwrite_do(void *private_data)
1049 {
1050         struct vfs_gluster_pwrite_state *state = talloc_get_type_abort(
1051                 private_data, struct vfs_gluster_pwrite_state);
1052         struct timespec start_time;
1053         struct timespec end_time;
1054
1055         SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
1056
1057         PROFILE_TIMESTAMP(&start_time);
1058
1059         do {
1060 #ifdef HAVE_GFAPI_VER_7_6
1061                 state->ret = glfs_pwrite(state->fd, state->buf, state->count,
1062                                          state->offset, 0, NULL, NULL);
1063 #else
1064                 state->ret = glfs_pwrite(state->fd, state->buf, state->count,
1065                                          state->offset, 0);
1066 #endif
1067         } while ((state->ret == -1) && (errno == EINTR));
1068
1069         if (state->ret == -1) {
1070                 state->vfs_aio_state.error = errno;
1071         }
1072
1073         PROFILE_TIMESTAMP(&end_time);
1074
1075         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
1076
1077         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
1078 }
1079
1080 static int vfs_gluster_pwrite_state_destructor(struct vfs_gluster_pwrite_state *state)
1081 {
1082         return -1;
1083 }
1084
1085 static void vfs_gluster_pwrite_done(struct tevent_req *subreq)
1086 {
1087         struct tevent_req *req = tevent_req_callback_data(
1088                 subreq, struct tevent_req);
1089         struct vfs_gluster_pwrite_state *state = tevent_req_data(
1090                 req, struct vfs_gluster_pwrite_state);
1091         int ret;
1092
1093         ret = pthreadpool_tevent_job_recv(subreq);
1094         TALLOC_FREE(subreq);
1095         SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
1096         talloc_set_destructor(state, NULL);
1097         if (ret != 0) {
1098                 if (ret != EAGAIN) {
1099                         tevent_req_error(req, ret);
1100                         return;
1101                 }
1102                 /*
1103                  * If we get EAGAIN from pthreadpool_tevent_job_recv() this
1104                  * means the lower level pthreadpool failed to create a new
1105                  * thread. Fallback to sync processing in that case to allow
1106                  * some progress for the client.
1107                  */
1108                 vfs_gluster_pwrite_do(state);
1109         }
1110
1111         tevent_req_done(req);
1112 }
1113
1114 static ssize_t vfs_gluster_pwrite_recv(struct tevent_req *req,
1115                                        struct vfs_aio_state *vfs_aio_state)
1116 {
1117         struct vfs_gluster_pwrite_state *state = tevent_req_data(
1118                 req, struct vfs_gluster_pwrite_state);
1119
1120         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1121                 return -1;
1122         }
1123
1124         *vfs_aio_state = state->vfs_aio_state;
1125
1126         return state->ret;
1127 }
1128
1129 static ssize_t vfs_gluster_pwrite(struct vfs_handle_struct *handle,
1130                                   files_struct *fsp, const void *data,
1131                                   size_t n, off_t offset)
1132 {
1133         ssize_t ret;
1134         glfs_fd_t *glfd = NULL;
1135
1136         START_PROFILE_BYTES(syscall_pwrite, n);
1137
1138         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1139         if (glfd == NULL) {
1140                 END_PROFILE_BYTES(syscall_pwrite);
1141                 DBG_ERR("Failed to fetch gluster fd\n");
1142                 return -1;
1143         }
1144
1145 #ifdef HAVE_GFAPI_VER_7_6
1146         ret = glfs_pwrite(glfd, data, n, offset, 0, NULL, NULL);
1147 #else
1148         ret = glfs_pwrite(glfd, data, n, offset, 0);
1149 #endif
1150         END_PROFILE_BYTES(syscall_pwrite);
1151
1152         return ret;
1153 }
1154
1155 static off_t vfs_gluster_lseek(struct vfs_handle_struct *handle,
1156                                files_struct *fsp, off_t offset, int whence)
1157 {
1158         off_t ret = 0;
1159         glfs_fd_t *glfd = NULL;
1160
1161         START_PROFILE(syscall_lseek);
1162
1163         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1164         if (glfd == NULL) {
1165                 END_PROFILE(syscall_lseek);
1166                 DBG_ERR("Failed to fetch gluster fd\n");
1167                 return -1;
1168         }
1169
1170         ret = glfs_lseek(glfd, offset, whence);
1171         END_PROFILE(syscall_lseek);
1172
1173         return ret;
1174 }
1175
1176 static ssize_t vfs_gluster_sendfile(struct vfs_handle_struct *handle, int tofd,
1177                                     files_struct *fromfsp,
1178                                     const DATA_BLOB *hdr,
1179                                     off_t offset, size_t n)
1180 {
1181         errno = ENOTSUP;
1182         return -1;
1183 }
1184
1185 static ssize_t vfs_gluster_recvfile(struct vfs_handle_struct *handle,
1186                                     int fromfd, files_struct *tofsp,
1187                                     off_t offset, size_t n)
1188 {
1189         errno = ENOTSUP;
1190         return -1;
1191 }
1192
1193 static int vfs_gluster_renameat(struct vfs_handle_struct *handle,
1194                         files_struct *srcfsp,
1195                         const struct smb_filename *smb_fname_src,
1196                         files_struct *dstfsp,
1197                         const struct smb_filename *smb_fname_dst)
1198 {
1199         int ret;
1200
1201         START_PROFILE(syscall_renameat);
1202         ret = glfs_rename(handle->data, smb_fname_src->base_name,
1203                           smb_fname_dst->base_name);
1204         END_PROFILE(syscall_renameat);
1205
1206         return ret;
1207 }
1208
1209 struct vfs_gluster_fsync_state {
1210         ssize_t ret;
1211         glfs_fd_t *fd;
1212
1213         struct vfs_aio_state vfs_aio_state;
1214         SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
1215 };
1216
1217 static void vfs_gluster_fsync_do(void *private_data);
1218 static void vfs_gluster_fsync_done(struct tevent_req *subreq);
1219 static int vfs_gluster_fsync_state_destructor(struct vfs_gluster_fsync_state *state);
1220
1221 static struct tevent_req *vfs_gluster_fsync_send(struct vfs_handle_struct
1222                                                  *handle, TALLOC_CTX *mem_ctx,
1223                                                  struct tevent_context *ev,
1224                                                  files_struct *fsp)
1225 {
1226         struct tevent_req *req, *subreq;
1227         struct vfs_gluster_fsync_state *state;
1228
1229         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1230         if (glfd == NULL) {
1231                 DBG_ERR("Failed to fetch gluster fd\n");
1232                 return NULL;
1233         }
1234
1235         req = tevent_req_create(mem_ctx, &state, struct vfs_gluster_fsync_state);
1236         if (req == NULL) {
1237                 return NULL;
1238         }
1239
1240         state->ret = -1;
1241         state->fd = glfd;
1242
1243         SMBPROFILE_BYTES_ASYNC_START(syscall_asys_fsync, profile_p,
1244                                      state->profile_bytes, 0);
1245         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
1246
1247         subreq = pthreadpool_tevent_job_send(
1248                 state, ev, handle->conn->sconn->pool, vfs_gluster_fsync_do, state);
1249         if (tevent_req_nomem(subreq, req)) {
1250                 return tevent_req_post(req, ev);
1251         }
1252         tevent_req_set_callback(subreq, vfs_gluster_fsync_done, req);
1253
1254         talloc_set_destructor(state, vfs_gluster_fsync_state_destructor);
1255
1256         return req;
1257 }
1258
1259 static void vfs_gluster_fsync_do(void *private_data)
1260 {
1261         struct vfs_gluster_fsync_state *state = talloc_get_type_abort(
1262                 private_data, struct vfs_gluster_fsync_state);
1263         struct timespec start_time;
1264         struct timespec end_time;
1265
1266         SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
1267
1268         PROFILE_TIMESTAMP(&start_time);
1269
1270         do {
1271 #ifdef HAVE_GFAPI_VER_7_6
1272                 state->ret = glfs_fsync(state->fd, NULL, NULL);
1273 #else
1274                 state->ret = glfs_fsync(state->fd);
1275 #endif
1276         } while ((state->ret == -1) && (errno == EINTR));
1277
1278         if (state->ret == -1) {
1279                 state->vfs_aio_state.error = errno;
1280         }
1281
1282         PROFILE_TIMESTAMP(&end_time);
1283
1284         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
1285
1286         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
1287 }
1288
1289 static int vfs_gluster_fsync_state_destructor(struct vfs_gluster_fsync_state *state)
1290 {
1291         return -1;
1292 }
1293
1294 static void vfs_gluster_fsync_done(struct tevent_req *subreq)
1295 {
1296         struct tevent_req *req = tevent_req_callback_data(
1297                 subreq, struct tevent_req);
1298         struct vfs_gluster_fsync_state *state = tevent_req_data(
1299                 req, struct vfs_gluster_fsync_state);
1300         int ret;
1301
1302         ret = pthreadpool_tevent_job_recv(subreq);
1303         TALLOC_FREE(subreq);
1304         SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
1305         talloc_set_destructor(state, NULL);
1306         if (ret != 0) {
1307                 if (ret != EAGAIN) {
1308                         tevent_req_error(req, ret);
1309                         return;
1310                 }
1311                 /*
1312                  * If we get EAGAIN from pthreadpool_tevent_job_recv() this
1313                  * means the lower level pthreadpool failed to create a new
1314                  * thread. Fallback to sync processing in that case to allow
1315                  * some progress for the client.
1316                  */
1317                 vfs_gluster_fsync_do(state);
1318         }
1319
1320         tevent_req_done(req);
1321 }
1322
1323 static int vfs_gluster_fsync_recv(struct tevent_req *req,
1324                                   struct vfs_aio_state *vfs_aio_state)
1325 {
1326         struct vfs_gluster_fsync_state *state = tevent_req_data(
1327                 req, struct vfs_gluster_fsync_state);
1328
1329         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1330                 return -1;
1331         }
1332
1333         *vfs_aio_state = state->vfs_aio_state;
1334         return state->ret;
1335 }
1336
1337 static int vfs_gluster_stat(struct vfs_handle_struct *handle,
1338                             struct smb_filename *smb_fname)
1339 {
1340         struct stat st;
1341         int ret;
1342
1343         START_PROFILE(syscall_stat);
1344         ret = glfs_stat(handle->data, smb_fname->base_name, &st);
1345         if (ret == 0) {
1346                 smb_stat_ex_from_stat(&smb_fname->st, &st);
1347         }
1348         if (ret < 0 && errno != ENOENT) {
1349                 DEBUG(0, ("glfs_stat(%s) failed: %s\n",
1350                           smb_fname->base_name, strerror(errno)));
1351         }
1352         END_PROFILE(syscall_stat);
1353
1354         return ret;
1355 }
1356
1357 static int vfs_gluster_fstat(struct vfs_handle_struct *handle,
1358                              files_struct *fsp, SMB_STRUCT_STAT *sbuf)
1359 {
1360         struct stat st;
1361         int ret;
1362         glfs_fd_t *glfd = NULL;
1363
1364         START_PROFILE(syscall_fstat);
1365
1366         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1367         if (glfd == NULL) {
1368                 END_PROFILE(syscall_fstat);
1369                 DBG_ERR("Failed to fetch gluster fd\n");
1370                 return -1;
1371         }
1372
1373         ret = glfs_fstat(glfd, &st);
1374         if (ret == 0) {
1375                 smb_stat_ex_from_stat(sbuf, &st);
1376         }
1377         if (ret < 0) {
1378                 DEBUG(0, ("glfs_fstat(%d) failed: %s\n",
1379                           fsp_get_io_fd(fsp), strerror(errno)));
1380         }
1381         END_PROFILE(syscall_fstat);
1382
1383         return ret;
1384 }
1385
1386 static int vfs_gluster_lstat(struct vfs_handle_struct *handle,
1387                              struct smb_filename *smb_fname)
1388 {
1389         struct stat st;
1390         int ret;
1391
1392         START_PROFILE(syscall_lstat);
1393         ret = glfs_lstat(handle->data, smb_fname->base_name, &st);
1394         if (ret == 0) {
1395                 smb_stat_ex_from_stat(&smb_fname->st, &st);
1396         }
1397         if (ret < 0 && errno != ENOENT) {
1398                 DEBUG(0, ("glfs_lstat(%s) failed: %s\n",
1399                           smb_fname->base_name, strerror(errno)));
1400         }
1401         END_PROFILE(syscall_lstat);
1402
1403         return ret;
1404 }
1405
1406 static uint64_t vfs_gluster_get_alloc_size(struct vfs_handle_struct *handle,
1407                                            files_struct *fsp,
1408                                            const SMB_STRUCT_STAT *sbuf)
1409 {
1410         uint64_t ret;
1411
1412         START_PROFILE(syscall_get_alloc_size);
1413         ret = sbuf->st_ex_blocks * 512;
1414         END_PROFILE(syscall_get_alloc_size);
1415
1416         return ret;
1417 }
1418
1419 static int vfs_gluster_unlinkat(struct vfs_handle_struct *handle,
1420                         struct files_struct *dirfsp,
1421                         const struct smb_filename *smb_fname,
1422                         int flags)
1423 {
1424         int ret;
1425
1426         START_PROFILE(syscall_unlinkat);
1427         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
1428         if (flags & AT_REMOVEDIR) {
1429                 ret = glfs_rmdir(handle->data, smb_fname->base_name);
1430         } else {
1431                 ret = glfs_unlink(handle->data, smb_fname->base_name);
1432         }
1433         END_PROFILE(syscall_unlinkat);
1434
1435         return ret;
1436 }
1437
1438 static int vfs_gluster_chmod(struct vfs_handle_struct *handle,
1439                                 const struct smb_filename *smb_fname,
1440                                 mode_t mode)
1441 {
1442         int ret;
1443
1444         START_PROFILE(syscall_chmod);
1445         ret = glfs_chmod(handle->data, smb_fname->base_name, mode);
1446         END_PROFILE(syscall_chmod);
1447
1448         return ret;
1449 }
1450
1451 static int vfs_gluster_fchmod(struct vfs_handle_struct *handle,
1452                               files_struct *fsp, mode_t mode)
1453 {
1454         int ret;
1455         glfs_fd_t *glfd = NULL;
1456
1457         START_PROFILE(syscall_fchmod);
1458
1459         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1460         if (glfd == NULL) {
1461                 END_PROFILE(syscall_fchmod);
1462                 DBG_ERR("Failed to fetch gluster fd\n");
1463                 return -1;
1464         }
1465
1466         ret = glfs_fchmod(glfd, mode);
1467         END_PROFILE(syscall_fchmod);
1468
1469         return ret;
1470 }
1471
1472 static int vfs_gluster_fchown(struct vfs_handle_struct *handle,
1473                               files_struct *fsp, uid_t uid, gid_t gid)
1474 {
1475         int ret;
1476         glfs_fd_t *glfd = NULL;
1477
1478         START_PROFILE(syscall_fchown);
1479
1480         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1481         if (glfd == NULL) {
1482                 END_PROFILE(syscall_fchown);
1483                 DBG_ERR("Failed to fetch gluster fd\n");
1484                 return -1;
1485         }
1486
1487         ret = glfs_fchown(glfd, uid, gid);
1488         END_PROFILE(syscall_fchown);
1489
1490         return ret;
1491 }
1492
1493 static int vfs_gluster_lchown(struct vfs_handle_struct *handle,
1494                         const struct smb_filename *smb_fname,
1495                         uid_t uid,
1496                         gid_t gid)
1497 {
1498         int ret;
1499
1500         START_PROFILE(syscall_lchown);
1501         ret = glfs_lchown(handle->data, smb_fname->base_name, uid, gid);
1502         END_PROFILE(syscall_lchown);
1503
1504         return ret;
1505 }
1506
1507 static int vfs_gluster_chdir(struct vfs_handle_struct *handle,
1508                         const struct smb_filename *smb_fname)
1509 {
1510         int ret;
1511
1512         START_PROFILE(syscall_chdir);
1513         ret = glfs_chdir(handle->data, smb_fname->base_name);
1514         END_PROFILE(syscall_chdir);
1515
1516         return ret;
1517 }
1518
1519 static struct smb_filename *vfs_gluster_getwd(struct vfs_handle_struct *handle,
1520                                 TALLOC_CTX *ctx)
1521 {
1522         char *cwd;
1523         char *ret;
1524         struct smb_filename *smb_fname = NULL;
1525
1526         START_PROFILE(syscall_getwd);
1527
1528         cwd = SMB_CALLOC_ARRAY(char, PATH_MAX);
1529         if (cwd == NULL) {
1530                 END_PROFILE(syscall_getwd);
1531                 return NULL;
1532         }
1533
1534         ret = glfs_getcwd(handle->data, cwd, PATH_MAX - 1);
1535         END_PROFILE(syscall_getwd);
1536
1537         if (ret == NULL) {
1538                 SAFE_FREE(cwd);
1539                 return NULL;
1540         }
1541         smb_fname = synthetic_smb_fname(ctx,
1542                                         ret,
1543                                         NULL,
1544                                         NULL,
1545                                         0,
1546                                         0);
1547         SAFE_FREE(cwd);
1548         return smb_fname;
1549 }
1550
1551 static int vfs_gluster_ntimes(struct vfs_handle_struct *handle,
1552                               const struct smb_filename *smb_fname,
1553                               struct smb_file_time *ft)
1554 {
1555         int ret = -1;
1556         struct timespec times[2];
1557
1558         START_PROFILE(syscall_ntimes);
1559
1560         if (is_omit_timespec(&ft->atime)) {
1561                 times[0].tv_sec = smb_fname->st.st_ex_atime.tv_sec;
1562                 times[0].tv_nsec = smb_fname->st.st_ex_atime.tv_nsec;
1563         } else {
1564                 times[0].tv_sec = ft->atime.tv_sec;
1565                 times[0].tv_nsec = ft->atime.tv_nsec;
1566         }
1567
1568         if (is_omit_timespec(&ft->mtime)) {
1569                 times[1].tv_sec = smb_fname->st.st_ex_mtime.tv_sec;
1570                 times[1].tv_nsec = smb_fname->st.st_ex_mtime.tv_nsec;
1571         } else {
1572                 times[1].tv_sec = ft->mtime.tv_sec;
1573                 times[1].tv_nsec = ft->mtime.tv_nsec;
1574         }
1575
1576         if ((timespec_compare(&times[0],
1577                               &smb_fname->st.st_ex_atime) == 0) &&
1578             (timespec_compare(&times[1],
1579                               &smb_fname->st.st_ex_mtime) == 0)) {
1580                 END_PROFILE(syscall_ntimes);
1581                 return 0;
1582         }
1583
1584         ret = glfs_utimens(handle->data, smb_fname->base_name, times);
1585         END_PROFILE(syscall_ntimes);
1586
1587         return ret;
1588 }
1589
1590 static int vfs_gluster_ftruncate(struct vfs_handle_struct *handle,
1591                                  files_struct *fsp, off_t offset)
1592 {
1593         int ret;
1594         glfs_fd_t *glfd = NULL;
1595
1596         START_PROFILE(syscall_ftruncate);
1597
1598         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1599         if (glfd == NULL) {
1600                 END_PROFILE(syscall_ftruncate);
1601                 DBG_ERR("Failed to fetch gluster fd\n");
1602                 return -1;
1603         }
1604
1605 #ifdef HAVE_GFAPI_VER_7_6
1606         ret = glfs_ftruncate(glfd, offset, NULL, NULL);
1607 #else
1608         ret = glfs_ftruncate(glfd, offset);
1609 #endif
1610         END_PROFILE(syscall_ftruncate);
1611
1612         return ret;
1613 }
1614
1615 static int vfs_gluster_fallocate(struct vfs_handle_struct *handle,
1616                                  struct files_struct *fsp,
1617                                  uint32_t mode,
1618                                  off_t offset, off_t len)
1619 {
1620         int ret;
1621 #ifdef HAVE_GFAPI_VER_6
1622         glfs_fd_t *glfd = NULL;
1623         int keep_size, punch_hole;
1624
1625         START_PROFILE(syscall_fallocate);
1626
1627         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1628         if (glfd == NULL) {
1629                 END_PROFILE(syscall_fallocate);
1630                 DBG_ERR("Failed to fetch gluster fd\n");
1631                 return -1;
1632         }
1633
1634         keep_size = mode & VFS_FALLOCATE_FL_KEEP_SIZE;
1635         punch_hole = mode & VFS_FALLOCATE_FL_PUNCH_HOLE;
1636
1637         mode &= ~(VFS_FALLOCATE_FL_KEEP_SIZE|VFS_FALLOCATE_FL_PUNCH_HOLE);
1638         if (mode != 0) {
1639                 END_PROFILE(syscall_fallocate);
1640                 errno = ENOTSUP;
1641                 return -1;
1642         }
1643
1644         if (punch_hole) {
1645                 ret = glfs_discard(glfd, offset, len);
1646                 if (ret != 0) {
1647                         DBG_DEBUG("glfs_discard failed: %s\n",
1648                                   strerror(errno));
1649                 }
1650         }
1651
1652         ret = glfs_fallocate(glfd, keep_size, offset, len);
1653         END_PROFILE(syscall_fallocate);
1654 #else
1655         errno = ENOTSUP;
1656         ret = -1;
1657 #endif
1658         return ret;
1659 }
1660
1661 static struct smb_filename *vfs_gluster_realpath(struct vfs_handle_struct *handle,
1662                                 TALLOC_CTX *ctx,
1663                                 const struct smb_filename *smb_fname)
1664 {
1665         char *result = NULL;
1666         struct smb_filename *result_fname = NULL;
1667         char *resolved_path = NULL;
1668
1669         START_PROFILE(syscall_realpath);
1670
1671         resolved_path = SMB_MALLOC_ARRAY(char, PATH_MAX+1);
1672         if (resolved_path == NULL) {
1673                 END_PROFILE(syscall_realpath);
1674                 errno = ENOMEM;
1675                 return NULL;
1676         }
1677
1678         result = glfs_realpath(handle->data,
1679                         smb_fname->base_name,
1680                         resolved_path);
1681         if (result != NULL) {
1682                 result_fname = synthetic_smb_fname(ctx,
1683                                                    result,
1684                                                    NULL,
1685                                                    NULL,
1686                                                    0,
1687                                                    0);
1688         }
1689
1690         SAFE_FREE(resolved_path);
1691         END_PROFILE(syscall_realpath);
1692
1693         return result_fname;
1694 }
1695
1696 static bool vfs_gluster_lock(struct vfs_handle_struct *handle,
1697                              files_struct *fsp, int op, off_t offset,
1698                              off_t count, int type)
1699 {
1700         struct flock flock = { 0, };
1701         int ret;
1702         glfs_fd_t *glfd = NULL;
1703         bool ok = false;
1704
1705         START_PROFILE(syscall_fcntl_lock);
1706
1707         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1708         if (glfd == NULL) {
1709                 DBG_ERR("Failed to fetch gluster fd\n");
1710                 ok = false;
1711                 goto out;
1712         }
1713
1714         flock.l_type = type;
1715         flock.l_whence = SEEK_SET;
1716         flock.l_start = offset;
1717         flock.l_len = count;
1718         flock.l_pid = 0;
1719
1720         ret = glfs_posix_lock(glfd, op, &flock);
1721
1722         if (op == F_GETLK) {
1723                 /* lock query, true if someone else has locked */
1724                 if ((ret != -1) &&
1725                     (flock.l_type != F_UNLCK) &&
1726                     (flock.l_pid != 0) && (flock.l_pid != getpid())) {
1727                         ok = true;
1728                         goto out;
1729                 }
1730                 /* not me */
1731                 ok = false;
1732                 goto out;
1733         }
1734
1735         if (ret == -1) {
1736                 ok = false;
1737                 goto out;
1738         }
1739
1740         ok = true;
1741 out:
1742         END_PROFILE(syscall_fcntl_lock);
1743
1744         return ok;
1745 }
1746
1747 static int vfs_gluster_kernel_flock(struct vfs_handle_struct *handle,
1748                                     files_struct *fsp, uint32_t share_access,
1749                                     uint32_t access_mask)
1750 {
1751         errno = ENOSYS;
1752         return -1;
1753 }
1754
1755 static int vfs_gluster_fcntl(vfs_handle_struct *handle,
1756                              files_struct *fsp, int cmd, va_list cmd_arg)
1757 {
1758         /*
1759          * SMB_VFS_FCNTL() is currently only called by vfs_set_blocking() to
1760          * clear O_NONBLOCK, etc for LOCK_MAND and FIFOs. Ignore it.
1761          */
1762         if (cmd == F_GETFL) {
1763                 return 0;
1764         } else if (cmd == F_SETFL) {
1765                 va_list dup_cmd_arg;
1766                 int opt;
1767
1768                 va_copy(dup_cmd_arg, cmd_arg);
1769                 opt = va_arg(dup_cmd_arg, int);
1770                 va_end(dup_cmd_arg);
1771                 if (opt == 0) {
1772                         return 0;
1773                 }
1774                 DBG_ERR("unexpected fcntl SETFL(%d)\n", opt);
1775                 goto err_out;
1776         }
1777         DBG_ERR("unexpected fcntl: %d\n", cmd);
1778 err_out:
1779         errno = EINVAL;
1780         return -1;
1781 }
1782
1783 static int vfs_gluster_linux_setlease(struct vfs_handle_struct *handle,
1784                                       files_struct *fsp, int leasetype)
1785 {
1786         errno = ENOSYS;
1787         return -1;
1788 }
1789
1790 static bool vfs_gluster_getlock(struct vfs_handle_struct *handle,
1791                                 files_struct *fsp, off_t *poffset,
1792                                 off_t *pcount, int *ptype, pid_t *ppid)
1793 {
1794         struct flock flock = { 0, };
1795         int ret;
1796         glfs_fd_t *glfd = NULL;
1797
1798         START_PROFILE(syscall_fcntl_getlock);
1799
1800         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1801         if (glfd == NULL) {
1802                 END_PROFILE(syscall_fcntl_getlock);
1803                 DBG_ERR("Failed to fetch gluster fd\n");
1804                 return false;
1805         }
1806
1807         flock.l_type = *ptype;
1808         flock.l_whence = SEEK_SET;
1809         flock.l_start = *poffset;
1810         flock.l_len = *pcount;
1811         flock.l_pid = 0;
1812
1813         ret = glfs_posix_lock(glfd, F_GETLK, &flock);
1814
1815         if (ret == -1) {
1816                 END_PROFILE(syscall_fcntl_getlock);
1817                 return false;
1818         }
1819
1820         *ptype = flock.l_type;
1821         *poffset = flock.l_start;
1822         *pcount = flock.l_len;
1823         *ppid = flock.l_pid;
1824         END_PROFILE(syscall_fcntl_getlock);
1825
1826         return true;
1827 }
1828
1829 static int vfs_gluster_symlinkat(struct vfs_handle_struct *handle,
1830                                 const struct smb_filename *link_target,
1831                                 struct files_struct *dirfsp,
1832                                 const struct smb_filename *new_smb_fname)
1833 {
1834         int ret;
1835
1836         START_PROFILE(syscall_symlinkat);
1837         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
1838         ret = glfs_symlink(handle->data,
1839                         link_target->base_name,
1840                         new_smb_fname->base_name);
1841         END_PROFILE(syscall_symlinkat);
1842
1843         return ret;
1844 }
1845
1846 static int vfs_gluster_readlinkat(struct vfs_handle_struct *handle,
1847                                 const struct files_struct *dirfsp,
1848                                 const struct smb_filename *smb_fname,
1849                                 char *buf,
1850                                 size_t bufsiz)
1851 {
1852         int ret;
1853
1854         START_PROFILE(syscall_readlinkat);
1855         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
1856         ret = glfs_readlink(handle->data, smb_fname->base_name, buf, bufsiz);
1857         END_PROFILE(syscall_readlinkat);
1858
1859         return ret;
1860 }
1861
1862 static int vfs_gluster_linkat(struct vfs_handle_struct *handle,
1863                                 files_struct *srcfsp,
1864                                 const struct smb_filename *old_smb_fname,
1865                                 files_struct *dstfsp,
1866                                 const struct smb_filename *new_smb_fname,
1867                                 int flags)
1868 {
1869         int ret;
1870
1871         START_PROFILE(syscall_linkat);
1872
1873         SMB_ASSERT(srcfsp == srcfsp->conn->cwd_fsp);
1874         SMB_ASSERT(dstfsp == dstfsp->conn->cwd_fsp);
1875
1876         ret = glfs_link(handle->data,
1877                         old_smb_fname->base_name,
1878                         new_smb_fname->base_name);
1879         END_PROFILE(syscall_linkat);
1880
1881         return ret;
1882 }
1883
1884 static int vfs_gluster_mknodat(struct vfs_handle_struct *handle,
1885                                 files_struct *dirfsp,
1886                                 const struct smb_filename *smb_fname,
1887                                 mode_t mode,
1888                                 SMB_DEV_T dev)
1889 {
1890         int ret;
1891
1892         START_PROFILE(syscall_mknodat);
1893         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
1894         ret = glfs_mknod(handle->data, smb_fname->base_name, mode, dev);
1895         END_PROFILE(syscall_mknodat);
1896
1897         return ret;
1898 }
1899
1900 static int vfs_gluster_chflags(struct vfs_handle_struct *handle,
1901                                 const struct smb_filename *smb_fname,
1902                                 unsigned int flags)
1903 {
1904         errno = ENOSYS;
1905         return -1;
1906 }
1907
1908 static int vfs_gluster_get_real_filename(struct vfs_handle_struct *handle,
1909                                          const struct smb_filename *path,
1910                                          const char *name,
1911                                          TALLOC_CTX *mem_ctx,
1912                                          char **found_name)
1913 {
1914         int ret;
1915         char key_buf[GLUSTER_NAME_MAX + 64];
1916         char val_buf[GLUSTER_NAME_MAX + 1];
1917
1918         if (strlen(name) >= GLUSTER_NAME_MAX) {
1919                 errno = ENAMETOOLONG;
1920                 return -1;
1921         }
1922
1923         snprintf(key_buf, GLUSTER_NAME_MAX + 64,
1924                  "glusterfs.get_real_filename:%s", name);
1925
1926         ret = glfs_getxattr(handle->data, path->base_name, key_buf, val_buf,
1927                             GLUSTER_NAME_MAX + 1);
1928         if (ret == -1) {
1929                 if (errno == ENOATTR) {
1930                         errno = ENOENT;
1931                 }
1932                 return -1;
1933         }
1934
1935         *found_name = talloc_strdup(mem_ctx, val_buf);
1936         if (found_name[0] == NULL) {
1937                 errno = ENOMEM;
1938                 return -1;
1939         }
1940         return 0;
1941 }
1942
1943 static const char *vfs_gluster_connectpath(struct vfs_handle_struct *handle,
1944                                 const struct smb_filename *smb_fname)
1945 {
1946         return handle->conn->connectpath;
1947 }
1948
1949 /* EA Operations */
1950
1951 static ssize_t vfs_gluster_getxattr(struct vfs_handle_struct *handle,
1952                                 const struct smb_filename *smb_fname,
1953                                 const char *name,
1954                                 void *value,
1955                                 size_t size)
1956 {
1957         return glfs_getxattr(handle->data, smb_fname->base_name,
1958                              name, value, size);
1959 }
1960
1961 static ssize_t vfs_gluster_fgetxattr(struct vfs_handle_struct *handle,
1962                                      files_struct *fsp, const char *name,
1963                                      void *value, size_t size)
1964 {
1965         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1966         if (glfd == NULL) {
1967                 DBG_ERR("Failed to fetch gluster fd\n");
1968                 return -1;
1969         }
1970
1971         return glfs_fgetxattr(glfd, name, value, size);
1972 }
1973
1974 static ssize_t vfs_gluster_listxattr(struct vfs_handle_struct *handle,
1975                                 const struct smb_filename *smb_fname,
1976                                 char *list,
1977                                 size_t size)
1978 {
1979         return glfs_listxattr(handle->data, smb_fname->base_name, list, size);
1980 }
1981
1982 static ssize_t vfs_gluster_flistxattr(struct vfs_handle_struct *handle,
1983                                       files_struct *fsp, char *list,
1984                                       size_t size)
1985 {
1986         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1987         if (glfd == NULL) {
1988                 DBG_ERR("Failed to fetch gluster fd\n");
1989                 return -1;
1990         }
1991
1992         return glfs_flistxattr(glfd, list, size);
1993 }
1994
1995 static int vfs_gluster_removexattr(struct vfs_handle_struct *handle,
1996                                 const struct smb_filename *smb_fname,
1997                                 const char *name)
1998 {
1999         return glfs_removexattr(handle->data, smb_fname->base_name, name);
2000 }
2001
2002 static int vfs_gluster_fremovexattr(struct vfs_handle_struct *handle,
2003                                     files_struct *fsp, const char *name)
2004 {
2005         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
2006         if (glfd == NULL) {
2007                 DBG_ERR("Failed to fetch gluster fd\n");
2008                 return -1;
2009         }
2010
2011         return glfs_fremovexattr(glfd, name);
2012 }
2013
2014 static int vfs_gluster_setxattr(struct vfs_handle_struct *handle,
2015                                 const struct smb_filename *smb_fname,
2016                                 const char *name,
2017                                 const void *value, size_t size, int flags)
2018 {
2019         return glfs_setxattr(handle->data, smb_fname->base_name, name, value, size, flags);
2020 }
2021
2022 static int vfs_gluster_fsetxattr(struct vfs_handle_struct *handle,
2023                                  files_struct *fsp, const char *name,
2024                                  const void *value, size_t size, int flags)
2025 {
2026         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
2027         if (glfd == NULL) {
2028                 DBG_ERR("Failed to fetch gluster fd\n");
2029                 return -1;
2030         }
2031
2032         return glfs_fsetxattr(glfd, name, value, size, flags);
2033 }
2034
2035 /* AIO Operations */
2036
2037 static bool vfs_gluster_aio_force(struct vfs_handle_struct *handle,
2038                                   files_struct *fsp)
2039 {
2040         return false;
2041 }
2042
2043 static NTSTATUS vfs_gluster_create_dfs_pathat(struct vfs_handle_struct *handle,
2044                                 struct files_struct *dirfsp,
2045                                 const struct smb_filename *smb_fname,
2046                                 const struct referral *reflist,
2047                                 size_t referral_count)
2048 {
2049         TALLOC_CTX *frame = talloc_stackframe();
2050         NTSTATUS status = NT_STATUS_NO_MEMORY;
2051         int ret;
2052         char *msdfs_link = NULL;
2053
2054         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
2055
2056         /* Form the msdfs_link contents */
2057         msdfs_link = msdfs_link_string(frame,
2058                                         reflist,
2059                                         referral_count);
2060         if (msdfs_link == NULL) {
2061                 goto out;
2062         }
2063
2064         ret = glfs_symlink(handle->data,
2065                         msdfs_link,
2066                         smb_fname->base_name);
2067         if (ret == 0) {
2068                 status = NT_STATUS_OK;
2069         } else {
2070                 status = map_nt_error_from_unix(errno);
2071         }
2072
2073   out:
2074
2075         TALLOC_FREE(frame);
2076         return status;
2077 }
2078
2079 /*
2080  * Read and return the contents of a DFS redirect given a
2081  * pathname. A caller can pass in NULL for ppreflist and
2082  * preferral_count but still determine if this was a
2083  * DFS redirect point by getting NT_STATUS_OK back
2084  * without incurring the overhead of reading and parsing
2085  * the referral contents.
2086  */
2087
2088 static NTSTATUS vfs_gluster_read_dfs_pathat(struct vfs_handle_struct *handle,
2089                                 TALLOC_CTX *mem_ctx,
2090                                 struct files_struct *dirfsp,
2091                                 struct smb_filename *smb_fname,
2092                                 struct referral **ppreflist,
2093                                 size_t *preferral_count)
2094 {
2095         NTSTATUS status = NT_STATUS_NO_MEMORY;
2096         size_t bufsize;
2097         char *link_target = NULL;
2098         int referral_len;
2099         bool ok;
2100 #if defined(HAVE_BROKEN_READLINK)
2101         char link_target_buf[PATH_MAX];
2102 #else
2103         char link_target_buf[7];
2104 #endif
2105         struct stat st;
2106         int ret;
2107
2108         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
2109
2110         if (is_named_stream(smb_fname)) {
2111                 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
2112                 goto err;
2113         }
2114
2115         if (ppreflist == NULL && preferral_count == NULL) {
2116                 /*
2117                  * We're only checking if this is a DFS
2118                  * redirect. We don't need to return data.
2119                  */
2120                 bufsize = sizeof(link_target_buf);
2121                 link_target = link_target_buf;
2122         } else {
2123                 bufsize = PATH_MAX;
2124                 link_target = talloc_array(mem_ctx, char, bufsize);
2125                 if (!link_target) {
2126                         goto err;
2127                 }
2128         }
2129
2130         ret = glfs_lstat(handle->data, smb_fname->base_name, &st);
2131         if (ret < 0) {
2132                 status = map_nt_error_from_unix(errno);
2133                 goto err;
2134         }
2135
2136         referral_len = glfs_readlink(handle->data,
2137                                 smb_fname->base_name,
2138                                 link_target,
2139                                 bufsize - 1);
2140         if (referral_len < 0) {
2141                 if (errno == EINVAL) {
2142                         DBG_INFO("%s is not a link.\n", smb_fname->base_name);
2143                         status = NT_STATUS_OBJECT_TYPE_MISMATCH;
2144                 } else {
2145                         status = map_nt_error_from_unix(errno);
2146                         DBG_ERR("Error reading "
2147                                 "msdfs link %s: %s\n",
2148                                 smb_fname->base_name,
2149                                 strerror(errno));
2150                 }
2151                 goto err;
2152         }
2153         link_target[referral_len] = '\0';
2154
2155         DBG_INFO("%s -> %s\n",
2156                         smb_fname->base_name,
2157                         link_target);
2158
2159         if (!strnequal(link_target, "msdfs:", 6)) {
2160                 status = NT_STATUS_OBJECT_TYPE_MISMATCH;
2161                 goto err;
2162         }
2163
2164         if (ppreflist == NULL && preferral_count == NULL) {
2165                 /* Early return for checking if this is a DFS link. */
2166                 smb_stat_ex_from_stat(&smb_fname->st, &st);
2167                 return NT_STATUS_OK;
2168         }
2169
2170         ok = parse_msdfs_symlink(mem_ctx,
2171                         lp_msdfs_shuffle_referrals(SNUM(handle->conn)),
2172                         link_target,
2173                         ppreflist,
2174                         preferral_count);
2175
2176         if (ok) {
2177                 smb_stat_ex_from_stat(&smb_fname->st, &st);
2178                 status = NT_STATUS_OK;
2179         } else {
2180                 status = NT_STATUS_NO_MEMORY;
2181         }
2182
2183   err:
2184
2185         if (link_target != link_target_buf) {
2186                 TALLOC_FREE(link_target);
2187         }
2188         return status;
2189 }
2190
2191 static struct vfs_fn_pointers glusterfs_fns = {
2192
2193         /* Disk Operations */
2194
2195         .connect_fn = vfs_gluster_connect,
2196         .disconnect_fn = vfs_gluster_disconnect,
2197         .disk_free_fn = vfs_gluster_disk_free,
2198         .get_quota_fn = vfs_gluster_get_quota,
2199         .set_quota_fn = vfs_gluster_set_quota,
2200         .statvfs_fn = vfs_gluster_statvfs,
2201         .fs_capabilities_fn = vfs_gluster_fs_capabilities,
2202
2203         .get_dfs_referrals_fn = NULL,
2204
2205         /* Directory Operations */
2206
2207         .fdopendir_fn = vfs_gluster_fdopendir,
2208         .readdir_fn = vfs_gluster_readdir,
2209         .seekdir_fn = vfs_gluster_seekdir,
2210         .telldir_fn = vfs_gluster_telldir,
2211         .rewind_dir_fn = vfs_gluster_rewinddir,
2212         .mkdirat_fn = vfs_gluster_mkdirat,
2213         .closedir_fn = vfs_gluster_closedir,
2214
2215         /* File Operations */
2216
2217         .openat_fn = vfs_gluster_openat,
2218         .create_file_fn = NULL,
2219         .close_fn = vfs_gluster_close,
2220         .pread_fn = vfs_gluster_pread,
2221         .pread_send_fn = vfs_gluster_pread_send,
2222         .pread_recv_fn = vfs_gluster_pread_recv,
2223         .pwrite_fn = vfs_gluster_pwrite,
2224         .pwrite_send_fn = vfs_gluster_pwrite_send,
2225         .pwrite_recv_fn = vfs_gluster_pwrite_recv,
2226         .lseek_fn = vfs_gluster_lseek,
2227         .sendfile_fn = vfs_gluster_sendfile,
2228         .recvfile_fn = vfs_gluster_recvfile,
2229         .renameat_fn = vfs_gluster_renameat,
2230         .fsync_send_fn = vfs_gluster_fsync_send,
2231         .fsync_recv_fn = vfs_gluster_fsync_recv,
2232
2233         .stat_fn = vfs_gluster_stat,
2234         .fstat_fn = vfs_gluster_fstat,
2235         .lstat_fn = vfs_gluster_lstat,
2236         .get_alloc_size_fn = vfs_gluster_get_alloc_size,
2237         .unlinkat_fn = vfs_gluster_unlinkat,
2238
2239         .chmod_fn = vfs_gluster_chmod,
2240         .fchmod_fn = vfs_gluster_fchmod,
2241         .fchown_fn = vfs_gluster_fchown,
2242         .lchown_fn = vfs_gluster_lchown,
2243         .chdir_fn = vfs_gluster_chdir,
2244         .getwd_fn = vfs_gluster_getwd,
2245         .ntimes_fn = vfs_gluster_ntimes,
2246         .ftruncate_fn = vfs_gluster_ftruncate,
2247         .fallocate_fn = vfs_gluster_fallocate,
2248         .lock_fn = vfs_gluster_lock,
2249         .kernel_flock_fn = vfs_gluster_kernel_flock,
2250         .fcntl_fn = vfs_gluster_fcntl,
2251         .linux_setlease_fn = vfs_gluster_linux_setlease,
2252         .getlock_fn = vfs_gluster_getlock,
2253         .symlinkat_fn = vfs_gluster_symlinkat,
2254         .readlinkat_fn = vfs_gluster_readlinkat,
2255         .linkat_fn = vfs_gluster_linkat,
2256         .mknodat_fn = vfs_gluster_mknodat,
2257         .realpath_fn = vfs_gluster_realpath,
2258         .chflags_fn = vfs_gluster_chflags,
2259         .file_id_create_fn = NULL,
2260         .streaminfo_fn = NULL,
2261         .get_real_filename_fn = vfs_gluster_get_real_filename,
2262         .connectpath_fn = vfs_gluster_connectpath,
2263         .create_dfs_pathat_fn = vfs_gluster_create_dfs_pathat,
2264         .read_dfs_pathat_fn = vfs_gluster_read_dfs_pathat,
2265
2266         .brl_lock_windows_fn = NULL,
2267         .brl_unlock_windows_fn = NULL,
2268         .strict_lock_check_fn = NULL,
2269         .translate_name_fn = NULL,
2270         .fsctl_fn = NULL,
2271
2272         /* NT ACL Operations */
2273         .fget_nt_acl_fn = NULL,
2274         .get_nt_acl_at_fn = NULL,
2275         .fset_nt_acl_fn = NULL,
2276         .audit_file_fn = NULL,
2277
2278         /* Posix ACL Operations */
2279         .sys_acl_get_file_fn = posixacl_xattr_acl_get_file,
2280         .sys_acl_get_fd_fn = posixacl_xattr_acl_get_fd,
2281         .sys_acl_blob_get_file_fn = posix_sys_acl_blob_get_file,
2282         .sys_acl_blob_get_fd_fn = posix_sys_acl_blob_get_fd,
2283         .sys_acl_set_file_fn = posixacl_xattr_acl_set_file,
2284         .sys_acl_set_fd_fn = posixacl_xattr_acl_set_fd,
2285         .sys_acl_delete_def_file_fn = posixacl_xattr_acl_delete_def_file,
2286
2287         /* EA Operations */
2288         .getxattr_fn = vfs_gluster_getxattr,
2289         .getxattrat_send_fn = vfs_not_implemented_getxattrat_send,
2290         .getxattrat_recv_fn = vfs_not_implemented_getxattrat_recv,
2291         .fgetxattr_fn = vfs_gluster_fgetxattr,
2292         .listxattr_fn = vfs_gluster_listxattr,
2293         .flistxattr_fn = vfs_gluster_flistxattr,
2294         .removexattr_fn = vfs_gluster_removexattr,
2295         .fremovexattr_fn = vfs_gluster_fremovexattr,
2296         .setxattr_fn = vfs_gluster_setxattr,
2297         .fsetxattr_fn = vfs_gluster_fsetxattr,
2298
2299         /* AIO Operations */
2300         .aio_force_fn = vfs_gluster_aio_force,
2301
2302         /* Durable handle Operations */
2303         .durable_cookie_fn = NULL,
2304         .durable_disconnect_fn = NULL,
2305         .durable_reconnect_fn = NULL,
2306 };
2307
2308 static_decl_vfs;
2309 NTSTATUS vfs_glusterfs_init(TALLOC_CTX *ctx)
2310 {
2311         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
2312                                 "glusterfs", &glusterfs_fns);
2313 }