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                 END_PROFILE(syscall_mkdirat);
 727                 return -1;
 728         }
 729
 730         ret = glfs_mkdir(handle->data, full_fname->base_name, mode);
 731
 732         TALLOC_FREE(full_fname);
 733
 734         END_PROFILE(syscall_mkdirat);
 735
 736         return ret;
 737 }
 738
 739 static int vfs_gluster_openat(struct vfs_handle_struct *handle,
 740                               const struct files_struct *dirfsp,
 741                               const struct smb_filename *smb_fname,
 742                               files_struct *fsp,
 743                               int flags,
 744                               mode_t mode)
 745 {
 746         struct smb_filename *name = NULL;
 747         bool became_root = false;
 748         glfs_fd_t *glfd;
 749         glfs_fd_t **p_tmp;
 750
 751         START_PROFILE(syscall_openat);
 752
 753         /*
 754          * Looks like glfs API doesn't have openat().
 755          */
 756         if (fsp_get_pathref_fd(dirfsp) != AT_FDCWD) {
 757                 name = full_path_from_dirfsp_atname(talloc_tos(),
 758                                                     dirfsp,
 759                                                     smb_fname);
 760                 if (name == NULL) {
 761                         return -1;
 762                 }
 763                 smb_fname = name;
 764         }
 765
 766         p_tmp = VFS_ADD_FSP_EXTENSION(handle, fsp, glfs_fd_t *, NULL);
 767         if (p_tmp == NULL) {
 768                 TALLOC_FREE(name);
 769                 END_PROFILE(syscall_openat);
 770                 errno = ENOMEM;
 771                 return -1;
 772         }
 773
 774         if (fsp->fsp_flags.is_pathref) {
 775                 /*
 776                  * ceph doesn't support O_PATH so we have to fallback to
 777                  * become_root().
 778                  */
 779                 become_root();
 780                 became_root = true;
 781         }
 782
 783         if (flags & O_DIRECTORY) {
 784                 glfd = glfs_opendir(handle->data, smb_fname->base_name);
 785         } else if (flags & O_CREAT) {
 786                 glfd = glfs_creat(handle->data, smb_fname->base_name, flags,
 787                                   mode);
 788         } else {
 789                 glfd = glfs_open(handle->data, smb_fname->base_name, flags);
 790         }
 791
 792         if (became_root) {
 793                 unbecome_root();
 794         }
 795
 796         fsp->fsp_flags.have_proc_fds = false;
 797
 798         if (glfd == NULL) {
 799                 TALLOC_FREE(name);
 800                 END_PROFILE(syscall_openat);
 801                 /* no extension destroy_fn, so no need to save errno */
 802                 VFS_REMOVE_FSP_EXTENSION(handle, fsp);
 803                 return -1;
 804         }
 805
 806         *p_tmp = glfd;
 807
 808         TALLOC_FREE(name);
 809         END_PROFILE(syscall_openat);
 810         /* An arbitrary value for error reporting, so you know its us. */
 811         return 13371337;
 812 }
 813
 814 static int vfs_gluster_close(struct vfs_handle_struct *handle,
 815                              files_struct *fsp)
 816 {
 817         int ret;
 818         glfs_fd_t *glfd = NULL;
 819
 820         START_PROFILE(syscall_close);
 821
 822         glfd = vfs_gluster_fetch_glfd(handle, fsp);
 823         if (glfd == NULL) {
 824                 END_PROFILE(syscall_close);
 825                 DBG_ERR("Failed to fetch gluster fd\n");
 826                 return -1;
 827         }
 828
 829         VFS_REMOVE_FSP_EXTENSION(handle, fsp);
 830
 831         ret = glfs_close(glfd);
 832         END_PROFILE(syscall_close);
 833
 834         return ret;
 835 }
 836
 837 static ssize_t vfs_gluster_pread(struct vfs_handle_struct *handle,
 838                                  files_struct *fsp, void *data, size_t n,
 839                                  off_t offset)
 840 {
 841         ssize_t ret;
 842         glfs_fd_t *glfd = NULL;
 843
 844         START_PROFILE_BYTES(syscall_pread, n);
 845
 846         glfd = vfs_gluster_fetch_glfd(handle, fsp);
 847         if (glfd == NULL) {
 848                 END_PROFILE_BYTES(syscall_pread);
 849                 DBG_ERR("Failed to fetch gluster fd\n");
 850                 return -1;
 851         }
 852
 853 #ifdef HAVE_GFAPI_VER_7_6
 854         ret = glfs_pread(glfd, data, n, offset, 0, NULL);
 855 #else
 856         ret = glfs_pread(glfd, data, n, offset, 0);
 857 #endif
 858         END_PROFILE_BYTES(syscall_pread);
 859
 860         return ret;
 861 }
 862
 863 struct vfs_gluster_pread_state {
 864         ssize_t ret;
 865         glfs_fd_t *fd;
 866         void *buf;
 867         size_t count;
 868         off_t offset;
 869
 870         struct vfs_aio_state vfs_aio_state;
 871         SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
 872 };
 873
 874 static void vfs_gluster_pread_do(void *private_data);
 875 static void vfs_gluster_pread_done(struct tevent_req *subreq);
 876 static int vfs_gluster_pread_state_destructor(struct vfs_gluster_pread_state *state);
 877
 878 static struct tevent_req *vfs_gluster_pread_send(struct vfs_handle_struct
 879                                                   *handle, TALLOC_CTX *mem_ctx,
 880                                                   struct tevent_context *ev,
 881                                                   files_struct *fsp,
 882                                                   void *data, size_t n,
 883                                                   off_t offset)
 884 {
 885         struct vfs_gluster_pread_state *state;
 886         struct tevent_req *req, *subreq;
 887
 888         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
 889         if (glfd == NULL) {
 890                 DBG_ERR("Failed to fetch gluster fd\n");
 891                 return NULL;
 892         }
 893
 894         req = tevent_req_create(mem_ctx, &state, struct vfs_gluster_pread_state);
 895         if (req == NULL) {
 896                 return NULL;
 897         }
 898
 899         state->ret = -1;
 900         state->fd = glfd;
 901         state->buf = data;
 902         state->count = n;
 903         state->offset = offset;
 904
 905         SMBPROFILE_BYTES_ASYNC_START(syscall_asys_pread, profile_p,
 906                                      state->profile_bytes, n);
 907         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
 908
 909         subreq = pthreadpool_tevent_job_send(
 910                 state, ev, handle->conn->sconn->pool,
 911                 vfs_gluster_pread_do, state);
 912         if (tevent_req_nomem(subreq, req)) {
 913                 return tevent_req_post(req, ev);
 914         }
 915         tevent_req_set_callback(subreq, vfs_gluster_pread_done, req);
 916
 917         talloc_set_destructor(state, vfs_gluster_pread_state_destructor);
 918
 919         return req;
 920 }
 921
 922 static void vfs_gluster_pread_do(void *private_data)
 923 {
 924         struct vfs_gluster_pread_state *state = talloc_get_type_abort(
 925                 private_data, struct vfs_gluster_pread_state);
 926         struct timespec start_time;
 927         struct timespec end_time;
 928
 929         SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
 930
 931         PROFILE_TIMESTAMP(&start_time);
 932
 933         do {
 934 #ifdef HAVE_GFAPI_VER_7_6
 935                 state->ret = glfs_pread(state->fd, state->buf, state->count,
 936                                         state->offset, 0, NULL);
 937 #else
 938                 state->ret = glfs_pread(state->fd, state->buf, state->count,
 939                                         state->offset, 0);
 940 #endif
 941         } while ((state->ret == -1) && (errno == EINTR));
 942
 943         if (state->ret == -1) {
 944                 state->vfs_aio_state.error = errno;
 945         }
 946
 947         PROFILE_TIMESTAMP(&end_time);
 948
 949         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
 950
 951         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
 952 }
 953
 954 static int vfs_gluster_pread_state_destructor(struct vfs_gluster_pread_state *state)
 955 {
 956         return -1;
 957 }
 958
 959 static void vfs_gluster_pread_done(struct tevent_req *subreq)
 960 {
 961         struct tevent_req *req = tevent_req_callback_data(
 962                 subreq, struct tevent_req);
 963         struct vfs_gluster_pread_state *state = tevent_req_data(
 964                 req, struct vfs_gluster_pread_state);
 965         int ret;
 966
 967         ret = pthreadpool_tevent_job_recv(subreq);
 968         TALLOC_FREE(subreq);
 969         SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
 970         talloc_set_destructor(state, NULL);
 971         if (ret != 0) {
 972                 if (ret != EAGAIN) {
 973                         tevent_req_error(req, ret);
 974                         return;
 975                 }
 976                 /*
 977                  * If we get EAGAIN from pthreadpool_tevent_job_recv() this
 978                  * means the lower level pthreadpool failed to create a new
 979                  * thread. Fallback to sync processing in that case to allow
 980                  * some progress for the client.
 981                  */
 982                 vfs_gluster_pread_do(state);
 983         }
 984
 985         tevent_req_done(req);
 986 }
 987
 988 static ssize_t vfs_gluster_pread_recv(struct tevent_req *req,
 989                                       struct vfs_aio_state *vfs_aio_state)
 990 {
 991         struct vfs_gluster_pread_state *state = tevent_req_data(
 992                 req, struct vfs_gluster_pread_state);
 993
 994         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
 995                 return -1;
 996         }
 997
 998         *vfs_aio_state = state->vfs_aio_state;
 999         return state->ret;
1000 }
1001
1002 struct vfs_gluster_pwrite_state {
1003         ssize_t ret;
1004         glfs_fd_t *fd;
1005         const void *buf;
1006         size_t count;
1007         off_t offset;
1008
1009         struct vfs_aio_state vfs_aio_state;
1010         SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
1011 };
1012
1013 static void vfs_gluster_pwrite_do(void *private_data);
1014 static void vfs_gluster_pwrite_done(struct tevent_req *subreq);
1015 static int vfs_gluster_pwrite_state_destructor(struct vfs_gluster_pwrite_state *state);
1016
1017 static struct tevent_req *vfs_gluster_pwrite_send(struct vfs_handle_struct
1018                                                   *handle, TALLOC_CTX *mem_ctx,
1019                                                   struct tevent_context *ev,
1020                                                   files_struct *fsp,
1021                                                   const void *data, size_t n,
1022                                                   off_t offset)
1023 {
1024         struct tevent_req *req, *subreq;
1025         struct vfs_gluster_pwrite_state *state;
1026
1027         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1028         if (glfd == NULL) {
1029                 DBG_ERR("Failed to fetch gluster fd\n");
1030                 return NULL;
1031         }
1032
1033         req = tevent_req_create(mem_ctx, &state, struct vfs_gluster_pwrite_state);
1034         if (req == NULL) {
1035                 return NULL;
1036         }
1037
1038         state->ret = -1;
1039         state->fd = glfd;
1040         state->buf = data;
1041         state->count = n;
1042         state->offset = offset;
1043
1044         SMBPROFILE_BYTES_ASYNC_START(syscall_asys_pwrite, profile_p,
1045                                      state->profile_bytes, n);
1046         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
1047
1048         subreq = pthreadpool_tevent_job_send(
1049                 state, ev, handle->conn->sconn->pool,
1050                 vfs_gluster_pwrite_do, state);
1051         if (tevent_req_nomem(subreq, req)) {
1052                 return tevent_req_post(req, ev);
1053         }
1054         tevent_req_set_callback(subreq, vfs_gluster_pwrite_done, req);
1055
1056         talloc_set_destructor(state, vfs_gluster_pwrite_state_destructor);
1057
1058         return req;
1059 }
1060
1061 static void vfs_gluster_pwrite_do(void *private_data)
1062 {
1063         struct vfs_gluster_pwrite_state *state = talloc_get_type_abort(
1064                 private_data, struct vfs_gluster_pwrite_state);
1065         struct timespec start_time;
1066         struct timespec end_time;
1067
1068         SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
1069
1070         PROFILE_TIMESTAMP(&start_time);
1071
1072         do {
1073 #ifdef HAVE_GFAPI_VER_7_6
1074                 state->ret = glfs_pwrite(state->fd, state->buf, state->count,
1075                                          state->offset, 0, NULL, NULL);
1076 #else
1077                 state->ret = glfs_pwrite(state->fd, state->buf, state->count,
1078                                          state->offset, 0);
1079 #endif
1080         } while ((state->ret == -1) && (errno == EINTR));
1081
1082         if (state->ret == -1) {
1083                 state->vfs_aio_state.error = errno;
1084         }
1085
1086         PROFILE_TIMESTAMP(&end_time);
1087
1088         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
1089
1090         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
1091 }
1092
1093 static int vfs_gluster_pwrite_state_destructor(struct vfs_gluster_pwrite_state *state)
1094 {
1095         return -1;
1096 }
1097
1098 static void vfs_gluster_pwrite_done(struct tevent_req *subreq)
1099 {
1100         struct tevent_req *req = tevent_req_callback_data(
1101                 subreq, struct tevent_req);
1102         struct vfs_gluster_pwrite_state *state = tevent_req_data(
1103                 req, struct vfs_gluster_pwrite_state);
1104         int ret;
1105
1106         ret = pthreadpool_tevent_job_recv(subreq);
1107         TALLOC_FREE(subreq);
1108         SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
1109         talloc_set_destructor(state, NULL);
1110         if (ret != 0) {
1111                 if (ret != EAGAIN) {
1112                         tevent_req_error(req, ret);
1113                         return;
1114                 }
1115                 /*
1116                  * If we get EAGAIN from pthreadpool_tevent_job_recv() this
1117                  * means the lower level pthreadpool failed to create a new
1118                  * thread. Fallback to sync processing in that case to allow
1119                  * some progress for the client.
1120                  */
1121                 vfs_gluster_pwrite_do(state);
1122         }
1123
1124         tevent_req_done(req);
1125 }
1126
1127 static ssize_t vfs_gluster_pwrite_recv(struct tevent_req *req,
1128                                        struct vfs_aio_state *vfs_aio_state)
1129 {
1130         struct vfs_gluster_pwrite_state *state = tevent_req_data(
1131                 req, struct vfs_gluster_pwrite_state);
1132
1133         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1134                 return -1;
1135         }
1136
1137         *vfs_aio_state = state->vfs_aio_state;
1138
1139         return state->ret;
1140 }
1141
1142 static ssize_t vfs_gluster_pwrite(struct vfs_handle_struct *handle,
1143                                   files_struct *fsp, const void *data,
1144                                   size_t n, off_t offset)
1145 {
1146         ssize_t ret;
1147         glfs_fd_t *glfd = NULL;
1148
1149         START_PROFILE_BYTES(syscall_pwrite, n);
1150
1151         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1152         if (glfd == NULL) {
1153                 END_PROFILE_BYTES(syscall_pwrite);
1154                 DBG_ERR("Failed to fetch gluster fd\n");
1155                 return -1;
1156         }
1157
1158 #ifdef HAVE_GFAPI_VER_7_6
1159         ret = glfs_pwrite(glfd, data, n, offset, 0, NULL, NULL);
1160 #else
1161         ret = glfs_pwrite(glfd, data, n, offset, 0);
1162 #endif
1163         END_PROFILE_BYTES(syscall_pwrite);
1164
1165         return ret;
1166 }
1167
1168 static off_t vfs_gluster_lseek(struct vfs_handle_struct *handle,
1169                                files_struct *fsp, off_t offset, int whence)
1170 {
1171         off_t ret = 0;
1172         glfs_fd_t *glfd = NULL;
1173
1174         START_PROFILE(syscall_lseek);
1175
1176         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1177         if (glfd == NULL) {
1178                 END_PROFILE(syscall_lseek);
1179                 DBG_ERR("Failed to fetch gluster fd\n");
1180                 return -1;
1181         }
1182
1183         ret = glfs_lseek(glfd, offset, whence);
1184         END_PROFILE(syscall_lseek);
1185
1186         return ret;
1187 }
1188
1189 static ssize_t vfs_gluster_sendfile(struct vfs_handle_struct *handle, int tofd,
1190                                     files_struct *fromfsp,
1191                                     const DATA_BLOB *hdr,
1192                                     off_t offset, size_t n)
1193 {
1194         errno = ENOTSUP;
1195         return -1;
1196 }
1197
1198 static ssize_t vfs_gluster_recvfile(struct vfs_handle_struct *handle,
1199                                     int fromfd, files_struct *tofsp,
1200                                     off_t offset, size_t n)
1201 {
1202         errno = ENOTSUP;
1203         return -1;
1204 }
1205
1206 static int vfs_gluster_renameat(struct vfs_handle_struct *handle,
1207                         files_struct *srcfsp,
1208                         const struct smb_filename *smb_fname_src,
1209                         files_struct *dstfsp,
1210                         const struct smb_filename *smb_fname_dst)
1211 {
1212         int ret;
1213
1214         START_PROFILE(syscall_renameat);
1215         ret = glfs_rename(handle->data, smb_fname_src->base_name,
1216                           smb_fname_dst->base_name);
1217         END_PROFILE(syscall_renameat);
1218
1219         return ret;
1220 }
1221
1222 struct vfs_gluster_fsync_state {
1223         ssize_t ret;
1224         glfs_fd_t *fd;
1225
1226         struct vfs_aio_state vfs_aio_state;
1227         SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
1228 };
1229
1230 static void vfs_gluster_fsync_do(void *private_data);
1231 static void vfs_gluster_fsync_done(struct tevent_req *subreq);
1232 static int vfs_gluster_fsync_state_destructor(struct vfs_gluster_fsync_state *state);
1233
1234 static struct tevent_req *vfs_gluster_fsync_send(struct vfs_handle_struct
1235                                                  *handle, TALLOC_CTX *mem_ctx,
1236                                                  struct tevent_context *ev,
1237                                                  files_struct *fsp)
1238 {
1239         struct tevent_req *req, *subreq;
1240         struct vfs_gluster_fsync_state *state;
1241
1242         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1243         if (glfd == NULL) {
1244                 DBG_ERR("Failed to fetch gluster fd\n");
1245                 return NULL;
1246         }
1247
1248         req = tevent_req_create(mem_ctx, &state, struct vfs_gluster_fsync_state);
1249         if (req == NULL) {
1250                 return NULL;
1251         }
1252
1253         state->ret = -1;
1254         state->fd = glfd;
1255
1256         SMBPROFILE_BYTES_ASYNC_START(syscall_asys_fsync, profile_p,
1257                                      state->profile_bytes, 0);
1258         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
1259
1260         subreq = pthreadpool_tevent_job_send(
1261                 state, ev, handle->conn->sconn->pool, vfs_gluster_fsync_do, state);
1262         if (tevent_req_nomem(subreq, req)) {
1263                 return tevent_req_post(req, ev);
1264         }
1265         tevent_req_set_callback(subreq, vfs_gluster_fsync_done, req);
1266
1267         talloc_set_destructor(state, vfs_gluster_fsync_state_destructor);
1268
1269         return req;
1270 }
1271
1272 static void vfs_gluster_fsync_do(void *private_data)
1273 {
1274         struct vfs_gluster_fsync_state *state = talloc_get_type_abort(
1275                 private_data, struct vfs_gluster_fsync_state);
1276         struct timespec start_time;
1277         struct timespec end_time;
1278
1279         SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
1280
1281         PROFILE_TIMESTAMP(&start_time);
1282
1283         do {
1284 #ifdef HAVE_GFAPI_VER_7_6
1285                 state->ret = glfs_fsync(state->fd, NULL, NULL);
1286 #else
1287                 state->ret = glfs_fsync(state->fd);
1288 #endif
1289         } while ((state->ret == -1) && (errno == EINTR));
1290
1291         if (state->ret == -1) {
1292                 state->vfs_aio_state.error = errno;
1293         }
1294
1295         PROFILE_TIMESTAMP(&end_time);
1296
1297         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
1298
1299         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
1300 }
1301
1302 static int vfs_gluster_fsync_state_destructor(struct vfs_gluster_fsync_state *state)
1303 {
1304         return -1;
1305 }
1306
1307 static void vfs_gluster_fsync_done(struct tevent_req *subreq)
1308 {
1309         struct tevent_req *req = tevent_req_callback_data(
1310                 subreq, struct tevent_req);
1311         struct vfs_gluster_fsync_state *state = tevent_req_data(
1312                 req, struct vfs_gluster_fsync_state);
1313         int ret;
1314
1315         ret = pthreadpool_tevent_job_recv(subreq);
1316         TALLOC_FREE(subreq);
1317         SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
1318         talloc_set_destructor(state, NULL);
1319         if (ret != 0) {
1320                 if (ret != EAGAIN) {
1321                         tevent_req_error(req, ret);
1322                         return;
1323                 }
1324                 /*
1325                  * If we get EAGAIN from pthreadpool_tevent_job_recv() this
1326                  * means the lower level pthreadpool failed to create a new
1327                  * thread. Fallback to sync processing in that case to allow
1328                  * some progress for the client.
1329                  */
1330                 vfs_gluster_fsync_do(state);
1331         }
1332
1333         tevent_req_done(req);
1334 }
1335
1336 static int vfs_gluster_fsync_recv(struct tevent_req *req,
1337                                   struct vfs_aio_state *vfs_aio_state)
1338 {
1339         struct vfs_gluster_fsync_state *state = tevent_req_data(
1340                 req, struct vfs_gluster_fsync_state);
1341
1342         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1343                 return -1;
1344         }
1345
1346         *vfs_aio_state = state->vfs_aio_state;
1347         return state->ret;
1348 }
1349
1350 static int vfs_gluster_stat(struct vfs_handle_struct *handle,
1351                             struct smb_filename *smb_fname)
1352 {
1353         struct stat st;
1354         int ret;
1355
1356         START_PROFILE(syscall_stat);
1357         ret = glfs_stat(handle->data, smb_fname->base_name, &st);
1358         if (ret == 0) {
1359                 smb_stat_ex_from_stat(&smb_fname->st, &st);
1360         }
1361         if (ret < 0 && errno != ENOENT) {
1362                 DEBUG(0, ("glfs_stat(%s) failed: %s\n",
1363                           smb_fname->base_name, strerror(errno)));
1364         }
1365         END_PROFILE(syscall_stat);
1366
1367         return ret;
1368 }
1369
1370 static int vfs_gluster_fstat(struct vfs_handle_struct *handle,
1371                              files_struct *fsp, SMB_STRUCT_STAT *sbuf)
1372 {
1373         struct stat st;
1374         int ret;
1375         glfs_fd_t *glfd = NULL;
1376
1377         START_PROFILE(syscall_fstat);
1378
1379         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1380         if (glfd == NULL) {
1381                 END_PROFILE(syscall_fstat);
1382                 DBG_ERR("Failed to fetch gluster fd\n");
1383                 return -1;
1384         }
1385
1386         ret = glfs_fstat(glfd, &st);
1387         if (ret == 0) {
1388                 smb_stat_ex_from_stat(sbuf, &st);
1389         }
1390         if (ret < 0) {
1391                 DEBUG(0, ("glfs_fstat(%d) failed: %s\n",
1392                           fsp_get_io_fd(fsp), strerror(errno)));
1393         }
1394         END_PROFILE(syscall_fstat);
1395
1396         return ret;
1397 }
1398
1399 static int vfs_gluster_lstat(struct vfs_handle_struct *handle,
1400                              struct smb_filename *smb_fname)
1401 {
1402         struct stat st;
1403         int ret;
1404
1405         START_PROFILE(syscall_lstat);
1406         ret = glfs_lstat(handle->data, smb_fname->base_name, &st);
1407         if (ret == 0) {
1408                 smb_stat_ex_from_stat(&smb_fname->st, &st);
1409         }
1410         if (ret < 0 && errno != ENOENT) {
1411                 DEBUG(0, ("glfs_lstat(%s) failed: %s\n",
1412                           smb_fname->base_name, strerror(errno)));
1413         }
1414         END_PROFILE(syscall_lstat);
1415
1416         return ret;
1417 }
1418
1419 static uint64_t vfs_gluster_get_alloc_size(struct vfs_handle_struct *handle,
1420                                            files_struct *fsp,
1421                                            const SMB_STRUCT_STAT *sbuf)
1422 {
1423         uint64_t ret;
1424
1425         START_PROFILE(syscall_get_alloc_size);
1426         ret = sbuf->st_ex_blocks * 512;
1427         END_PROFILE(syscall_get_alloc_size);
1428
1429         return ret;
1430 }
1431
1432 static int vfs_gluster_unlinkat(struct vfs_handle_struct *handle,
1433                         struct files_struct *dirfsp,
1434                         const struct smb_filename *smb_fname,
1435                         int flags)
1436 {
1437         struct smb_filename *full_fname = NULL;
1438         int ret;
1439
1440         START_PROFILE(syscall_unlinkat);
1441
1442         full_fname = full_path_from_dirfsp_atname(talloc_tos(),
1443                                                   dirfsp,
1444                                                   smb_fname);
1445         if (full_fname == NULL) {
1446                 END_PROFILE(syscall_unlinkat);
1447                 return -1;
1448         }
1449
1450         if (flags & AT_REMOVEDIR) {
1451                 ret = glfs_rmdir(handle->data, full_fname->base_name);
1452         } else {
1453                 ret = glfs_unlink(handle->data, full_fname->base_name);
1454         }
1455         TALLOC_FREE(full_fname);
1456         END_PROFILE(syscall_unlinkat);
1457
1458         return ret;
1459 }
1460
1461 static int vfs_gluster_fchmod(struct vfs_handle_struct *handle,
1462                               files_struct *fsp, mode_t mode)
1463 {
1464         int ret;
1465         glfs_fd_t *glfd = NULL;
1466
1467         START_PROFILE(syscall_fchmod);
1468
1469         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1470         if (glfd == NULL) {
1471                 END_PROFILE(syscall_fchmod);
1472                 DBG_ERR("Failed to fetch gluster fd\n");
1473                 return -1;
1474         }
1475
1476         if (!fsp->fsp_flags.is_pathref) {
1477                 /*
1478                  * We can use an io_fd to remove xattrs.
1479                  */
1480                 ret = glfs_fchmod(glfd, mode);
1481         } else {
1482                 /*
1483                  * This is no longer a handle based call.
1484                  */
1485                 ret = glfs_chmod(handle->data, fsp->fsp_name->base_name, mode);
1486         }
1487         END_PROFILE(syscall_fchmod);
1488
1489         return ret;
1490 }
1491
1492 static int vfs_gluster_fchown(struct vfs_handle_struct *handle,
1493                               files_struct *fsp, uid_t uid, gid_t gid)
1494 {
1495         int ret;
1496         glfs_fd_t *glfd = NULL;
1497
1498         START_PROFILE(syscall_fchown);
1499
1500         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1501         if (glfd == NULL) {
1502                 END_PROFILE(syscall_fchown);
1503                 DBG_ERR("Failed to fetch gluster fd\n");
1504                 return -1;
1505         }
1506
1507         ret = glfs_fchown(glfd, uid, gid);
1508         END_PROFILE(syscall_fchown);
1509
1510         return ret;
1511 }
1512
1513 static int vfs_gluster_lchown(struct vfs_handle_struct *handle,
1514                         const struct smb_filename *smb_fname,
1515                         uid_t uid,
1516                         gid_t gid)
1517 {
1518         int ret;
1519
1520         START_PROFILE(syscall_lchown);
1521         ret = glfs_lchown(handle->data, smb_fname->base_name, uid, gid);
1522         END_PROFILE(syscall_lchown);
1523
1524         return ret;
1525 }
1526
1527 static int vfs_gluster_chdir(struct vfs_handle_struct *handle,
1528                         const struct smb_filename *smb_fname)
1529 {
1530         int ret;
1531
1532         START_PROFILE(syscall_chdir);
1533         ret = glfs_chdir(handle->data, smb_fname->base_name);
1534         END_PROFILE(syscall_chdir);
1535
1536         return ret;
1537 }
1538
1539 static struct smb_filename *vfs_gluster_getwd(struct vfs_handle_struct *handle,
1540                                 TALLOC_CTX *ctx)
1541 {
1542         char cwd[PATH_MAX] = { '\0' };
1543         char *ret;
1544         struct smb_filename *smb_fname = NULL;
1545
1546         START_PROFILE(syscall_getwd);
1547
1548         ret = glfs_getcwd(handle->data, cwd, PATH_MAX - 1);
1549         END_PROFILE(syscall_getwd);
1550
1551         if (ret == NULL) {
1552                 return NULL;
1553         }
1554         smb_fname = synthetic_smb_fname(ctx,
1555                                         ret,
1556                                         NULL,
1557                                         NULL,
1558                                         0,
1559                                         0);
1560         return smb_fname;
1561 }
1562
1563 static int vfs_gluster_fntimes(struct vfs_handle_struct *handle,
1564                                files_struct *fsp,
1565                                struct smb_file_time *ft)
1566 {
1567         int ret = -1;
1568         struct timespec times[2];
1569         glfs_fd_t *glfd = NULL;
1570
1571         START_PROFILE(syscall_fntimes);
1572
1573         if (is_omit_timespec(&ft->atime)) {
1574                 times[0].tv_sec = fsp->fsp_name->st.st_ex_atime.tv_sec;
1575                 times[0].tv_nsec = fsp->fsp_name->st.st_ex_atime.tv_nsec;
1576         } else {
1577                 times[0].tv_sec = ft->atime.tv_sec;
1578                 times[0].tv_nsec = ft->atime.tv_nsec;
1579         }
1580
1581         if (is_omit_timespec(&ft->mtime)) {
1582                 times[1].tv_sec = fsp->fsp_name->st.st_ex_mtime.tv_sec;
1583                 times[1].tv_nsec = fsp->fsp_name->st.st_ex_mtime.tv_nsec;
1584         } else {
1585                 times[1].tv_sec = ft->mtime.tv_sec;
1586                 times[1].tv_nsec = ft->mtime.tv_nsec;
1587         }
1588
1589         if ((timespec_compare(&times[0],
1590                               &fsp->fsp_name->st.st_ex_atime) == 0) &&
1591             (timespec_compare(&times[1],
1592                               &fsp->fsp_name->st.st_ex_mtime) == 0)) {
1593                 END_PROFILE(syscall_fntimes);
1594                 return 0;
1595         }
1596
1597         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1598         if (glfd == NULL) {
1599                 END_PROFILE(syscall_fntimes);
1600                 DBG_ERR("Failed to fetch gluster fd\n");
1601                 return -1;
1602         }
1603
1604         ret = glfs_futimens(glfd, times);
1605         END_PROFILE(syscall_fntimes);
1606
1607         return ret;
1608 }
1609
1610 static int vfs_gluster_ftruncate(struct vfs_handle_struct *handle,
1611                                  files_struct *fsp, off_t offset)
1612 {
1613         int ret;
1614         glfs_fd_t *glfd = NULL;
1615
1616         START_PROFILE(syscall_ftruncate);
1617
1618         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1619         if (glfd == NULL) {
1620                 END_PROFILE(syscall_ftruncate);
1621                 DBG_ERR("Failed to fetch gluster fd\n");
1622                 return -1;
1623         }
1624
1625 #ifdef HAVE_GFAPI_VER_7_6
1626         ret = glfs_ftruncate(glfd, offset, NULL, NULL);
1627 #else
1628         ret = glfs_ftruncate(glfd, offset);
1629 #endif
1630         END_PROFILE(syscall_ftruncate);
1631
1632         return ret;
1633 }
1634
1635 static int vfs_gluster_fallocate(struct vfs_handle_struct *handle,
1636                                  struct files_struct *fsp,
1637                                  uint32_t mode,
1638                                  off_t offset, off_t len)
1639 {
1640         int ret;
1641 #ifdef HAVE_GFAPI_VER_6
1642         glfs_fd_t *glfd = NULL;
1643         int keep_size, punch_hole;
1644
1645         START_PROFILE(syscall_fallocate);
1646
1647         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1648         if (glfd == NULL) {
1649                 END_PROFILE(syscall_fallocate);
1650                 DBG_ERR("Failed to fetch gluster fd\n");
1651                 return -1;
1652         }
1653
1654         keep_size = mode & VFS_FALLOCATE_FL_KEEP_SIZE;
1655         punch_hole = mode & VFS_FALLOCATE_FL_PUNCH_HOLE;
1656
1657         mode &= ~(VFS_FALLOCATE_FL_KEEP_SIZE|VFS_FALLOCATE_FL_PUNCH_HOLE);
1658         if (mode != 0) {
1659                 END_PROFILE(syscall_fallocate);
1660                 errno = ENOTSUP;
1661                 return -1;
1662         }
1663
1664         if (punch_hole) {
1665                 ret = glfs_discard(glfd, offset, len);
1666                 if (ret != 0) {
1667                         DBG_DEBUG("glfs_discard failed: %s\n",
1668                                   strerror(errno));
1669                 }
1670         }
1671
1672         ret = glfs_fallocate(glfd, keep_size, offset, len);
1673         END_PROFILE(syscall_fallocate);
1674 #else
1675         errno = ENOTSUP;
1676         ret = -1;
1677 #endif
1678         return ret;
1679 }
1680
1681 static struct smb_filename *vfs_gluster_realpath(struct vfs_handle_struct *handle,
1682                                 TALLOC_CTX *ctx,
1683                                 const struct smb_filename *smb_fname)
1684 {
1685         char *result = NULL;
1686         struct smb_filename *result_fname = NULL;
1687         char *resolved_path = NULL;
1688
1689         START_PROFILE(syscall_realpath);
1690
1691         resolved_path = SMB_MALLOC_ARRAY(char, PATH_MAX+1);
1692         if (resolved_path == NULL) {
1693                 END_PROFILE(syscall_realpath);
1694                 errno = ENOMEM;
1695                 return NULL;
1696         }
1697
1698         result = glfs_realpath(handle->data,
1699                         smb_fname->base_name,
1700                         resolved_path);
1701         if (result != NULL) {
1702                 result_fname = synthetic_smb_fname(ctx,
1703                                                    result,
1704                                                    NULL,
1705                                                    NULL,
1706                                                    0,
1707                                                    0);
1708         }
1709
1710         SAFE_FREE(resolved_path);
1711         END_PROFILE(syscall_realpath);
1712
1713         return result_fname;
1714 }
1715
1716 static bool vfs_gluster_lock(struct vfs_handle_struct *handle,
1717                              files_struct *fsp, int op, off_t offset,
1718                              off_t count, int type)
1719 {
1720         struct flock flock = { 0, };
1721         int ret;
1722         glfs_fd_t *glfd = NULL;
1723         bool ok = false;
1724
1725         START_PROFILE(syscall_fcntl_lock);
1726
1727         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1728         if (glfd == NULL) {
1729                 DBG_ERR("Failed to fetch gluster fd\n");
1730                 ok = false;
1731                 goto out;
1732         }
1733
1734         flock.l_type = type;
1735         flock.l_whence = SEEK_SET;
1736         flock.l_start = offset;
1737         flock.l_len = count;
1738         flock.l_pid = 0;
1739
1740         ret = glfs_posix_lock(glfd, op, &flock);
1741
1742         if (op == F_GETLK) {
1743                 /* lock query, true if someone else has locked */
1744                 if ((ret != -1) &&
1745                     (flock.l_type != F_UNLCK) &&
1746                     (flock.l_pid != 0) && (flock.l_pid != getpid())) {
1747                         ok = true;
1748                         goto out;
1749                 }
1750                 /* not me */
1751                 ok = false;
1752                 goto out;
1753         }
1754
1755         if (ret == -1) {
1756                 ok = false;
1757                 goto out;
1758         }
1759
1760         ok = true;
1761 out:
1762         END_PROFILE(syscall_fcntl_lock);
1763
1764         return ok;
1765 }
1766
1767 static int vfs_gluster_kernel_flock(struct vfs_handle_struct *handle,
1768                                     files_struct *fsp, uint32_t share_access,
1769                                     uint32_t access_mask)
1770 {
1771         errno = ENOSYS;
1772         return -1;
1773 }
1774
1775 static int vfs_gluster_fcntl(vfs_handle_struct *handle,
1776                              files_struct *fsp, int cmd, va_list cmd_arg)
1777 {
1778         /*
1779          * SMB_VFS_FCNTL() is currently only called by vfs_set_blocking() to
1780          * clear O_NONBLOCK, etc for LOCK_MAND and FIFOs. Ignore it.
1781          */
1782         if (cmd == F_GETFL) {
1783                 return 0;
1784         } else if (cmd == F_SETFL) {
1785                 va_list dup_cmd_arg;
1786                 int opt;
1787
1788                 va_copy(dup_cmd_arg, cmd_arg);
1789                 opt = va_arg(dup_cmd_arg, int);
1790                 va_end(dup_cmd_arg);
1791                 if (opt == 0) {
1792                         return 0;
1793                 }
1794                 DBG_ERR("unexpected fcntl SETFL(%d)\n", opt);
1795                 goto err_out;
1796         }
1797         DBG_ERR("unexpected fcntl: %d\n", cmd);
1798 err_out:
1799         errno = EINVAL;
1800         return -1;
1801 }
1802
1803 static int vfs_gluster_linux_setlease(struct vfs_handle_struct *handle,
1804                                       files_struct *fsp, int leasetype)
1805 {
1806         errno = ENOSYS;
1807         return -1;
1808 }
1809
1810 static bool vfs_gluster_getlock(struct vfs_handle_struct *handle,
1811                                 files_struct *fsp, off_t *poffset,
1812                                 off_t *pcount, int *ptype, pid_t *ppid)
1813 {
1814         struct flock flock = { 0, };
1815         int ret;
1816         glfs_fd_t *glfd = NULL;
1817
1818         START_PROFILE(syscall_fcntl_getlock);
1819
1820         glfd = vfs_gluster_fetch_glfd(handle, fsp);
1821         if (glfd == NULL) {
1822                 END_PROFILE(syscall_fcntl_getlock);
1823                 DBG_ERR("Failed to fetch gluster fd\n");
1824                 return false;
1825         }
1826
1827         flock.l_type = *ptype;
1828         flock.l_whence = SEEK_SET;
1829         flock.l_start = *poffset;
1830         flock.l_len = *pcount;
1831         flock.l_pid = 0;
1832
1833         ret = glfs_posix_lock(glfd, F_GETLK, &flock);
1834
1835         if (ret == -1) {
1836                 END_PROFILE(syscall_fcntl_getlock);
1837                 return false;
1838         }
1839
1840         *ptype = flock.l_type;
1841         *poffset = flock.l_start;
1842         *pcount = flock.l_len;
1843         *ppid = flock.l_pid;
1844         END_PROFILE(syscall_fcntl_getlock);
1845
1846         return true;
1847 }
1848
1849 static int vfs_gluster_symlinkat(struct vfs_handle_struct *handle,
1850                                 const struct smb_filename *link_target,
1851                                 struct files_struct *dirfsp,
1852                                 const struct smb_filename *new_smb_fname)
1853 {
1854         struct smb_filename *full_fname = NULL;
1855         int ret;
1856
1857         START_PROFILE(syscall_symlinkat);
1858
1859         full_fname = full_path_from_dirfsp_atname(talloc_tos(),
1860                                                 dirfsp,
1861                                                 new_smb_fname);
1862         if (full_fname == NULL) {
1863                 END_PROFILE(syscall_symlinkat);
1864                 return -1;
1865         }
1866
1867         ret = glfs_symlink(handle->data,
1868                         link_target->base_name,
1869                         full_fname->base_name);
1870
1871         TALLOC_FREE(full_fname);
1872
1873         END_PROFILE(syscall_symlinkat);
1874
1875         return ret;
1876 }
1877
1878 static int vfs_gluster_readlinkat(struct vfs_handle_struct *handle,
1879                                 const struct files_struct *dirfsp,
1880                                 const struct smb_filename *smb_fname,
1881                                 char *buf,
1882                                 size_t bufsiz)
1883 {
1884         struct smb_filename *full_fname = NULL;
1885         int ret;
1886
1887         START_PROFILE(syscall_readlinkat);
1888
1889         full_fname = full_path_from_dirfsp_atname(talloc_tos(),
1890                                                 dirfsp,
1891                                                 smb_fname);
1892         if (full_fname == NULL) {
1893                 END_PROFILE(syscall_readlinkat);
1894                 return -1;
1895         }
1896
1897         ret = glfs_readlink(handle->data, full_fname->base_name, buf, bufsiz);
1898
1899         TALLOC_FREE(full_fname);
1900
1901         END_PROFILE(syscall_readlinkat);
1902
1903         return ret;
1904 }
1905
1906 static int vfs_gluster_linkat(struct vfs_handle_struct *handle,
1907                                 files_struct *srcfsp,
1908                                 const struct smb_filename *old_smb_fname,
1909                                 files_struct *dstfsp,
1910                                 const struct smb_filename *new_smb_fname,
1911                                 int flags)
1912 {
1913         int ret;
1914         struct smb_filename *full_fname_old = NULL;
1915         struct smb_filename *full_fname_new = NULL;
1916
1917         START_PROFILE(syscall_linkat);
1918
1919         full_fname_old = full_path_from_dirfsp_atname(talloc_tos(),
1920                                                 srcfsp,
1921                                                 old_smb_fname);
1922         if (full_fname_old == NULL) {
1923                 END_PROFILE(syscall_linkat);
1924                 return -1;
1925         }
1926         full_fname_new = full_path_from_dirfsp_atname(talloc_tos(),
1927                                                 dstfsp,
1928                                                 new_smb_fname);
1929         if (full_fname_new == NULL) {
1930                 TALLOC_FREE(full_fname_old);
1931                 END_PROFILE(syscall_linkat);
1932                 return -1;
1933         }
1934
1935         ret = glfs_link(handle->data,
1936                         full_fname_old->base_name,
1937                         full_fname_new->base_name);
1938
1939         TALLOC_FREE(full_fname_old);
1940         TALLOC_FREE(full_fname_new);
1941         END_PROFILE(syscall_linkat);
1942
1943         return ret;
1944 }
1945
1946 static int vfs_gluster_mknodat(struct vfs_handle_struct *handle,
1947                                 files_struct *dirfsp,
1948                                 const struct smb_filename *smb_fname,
1949                                 mode_t mode,
1950                                 SMB_DEV_T dev)
1951 {
1952         struct smb_filename *full_fname = NULL;
1953         int ret;
1954
1955         START_PROFILE(syscall_mknodat);
1956
1957         full_fname = full_path_from_dirfsp_atname(talloc_tos(),
1958                                                 dirfsp,
1959                                                 smb_fname);
1960         if (full_fname == NULL) {
1961                 END_PROFILE(syscall_mknodat);
1962                 return -1;
1963         }
1964
1965         ret = glfs_mknod(handle->data, full_fname->base_name, mode, dev);
1966
1967         TALLOC_FREE(full_fname);
1968
1969         END_PROFILE(syscall_mknodat);
1970
1971         return ret;
1972 }
1973
1974 static int vfs_gluster_chflags(struct vfs_handle_struct *handle,
1975                                 const struct smb_filename *smb_fname,
1976                                 unsigned int flags)
1977 {
1978         errno = ENOSYS;
1979         return -1;
1980 }
1981
1982 static int vfs_gluster_get_real_filename(struct vfs_handle_struct *handle,
1983                                          const struct smb_filename *path,
1984                                          const char *name,
1985                                          TALLOC_CTX *mem_ctx,
1986                                          char **found_name)
1987 {
1988         int ret;
1989         char key_buf[GLUSTER_NAME_MAX + 64];
1990         char val_buf[GLUSTER_NAME_MAX + 1];
1991
1992         if (strlen(name) >= GLUSTER_NAME_MAX) {
1993                 errno = ENAMETOOLONG;
1994                 return -1;
1995         }
1996
1997         snprintf(key_buf, GLUSTER_NAME_MAX + 64,
1998                  "glusterfs.get_real_filename:%s", name);
1999
2000         ret = glfs_getxattr(handle->data, path->base_name, key_buf, val_buf,
2001                             GLUSTER_NAME_MAX + 1);
2002         if (ret == -1) {
2003                 if (errno == ENOATTR) {
2004                         errno = ENOENT;
2005                 }
2006                 return -1;
2007         }
2008
2009         *found_name = talloc_strdup(mem_ctx, val_buf);
2010         if (found_name[0] == NULL) {
2011                 errno = ENOMEM;
2012                 return -1;
2013         }
2014         return 0;
2015 }
2016
2017 static const char *vfs_gluster_connectpath(struct vfs_handle_struct *handle,
2018                                 const struct smb_filename *smb_fname)
2019 {
2020         return handle->conn->connectpath;
2021 }
2022
2023 /* EA Operations */
2024
2025 static ssize_t vfs_gluster_getxattr(struct vfs_handle_struct *handle,
2026                                 const struct smb_filename *smb_fname,
2027                                 const char *name,
2028                                 void *value,
2029                                 size_t size)
2030 {
2031         return glfs_getxattr(handle->data, smb_fname->base_name,
2032                              name, value, size);
2033 }
2034
2035 static ssize_t vfs_gluster_fgetxattr(struct vfs_handle_struct *handle,
2036                                      files_struct *fsp, const char *name,
2037                                      void *value, size_t size)
2038 {
2039         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
2040         if (glfd == NULL) {
2041                 DBG_ERR("Failed to fetch gluster fd\n");
2042                 return -1;
2043         }
2044
2045         return glfs_fgetxattr(glfd, name, value, size);
2046 }
2047
2048 static ssize_t vfs_gluster_flistxattr(struct vfs_handle_struct *handle,
2049                                       files_struct *fsp, char *list,
2050                                       size_t size)
2051 {
2052         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
2053         if (glfd == NULL) {
2054                 DBG_ERR("Failed to fetch gluster fd\n");
2055                 return -1;
2056         }
2057         if (!fsp->fsp_flags.is_pathref) {
2058                 /*
2059                  * We can use an io_fd to list xattrs.
2060                  */
2061                 return glfs_flistxattr(glfd, list, size);
2062         } else {
2063                 /*
2064                  * This is no longer a handle based call.
2065                  */
2066                 return glfs_listxattr(handle->data,
2067                                 fsp->fsp_name->base_name,
2068                                 list,
2069                                 size);
2070         }
2071 }
2072
2073 static int vfs_gluster_fremovexattr(struct vfs_handle_struct *handle,
2074                                     files_struct *fsp, const char *name)
2075 {
2076         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
2077         if (glfd == NULL) {
2078                 DBG_ERR("Failed to fetch gluster fd\n");
2079                 return -1;
2080         }
2081         if (!fsp->fsp_flags.is_pathref) {
2082                 /*
2083                  * We can use an io_fd to remove xattrs.
2084                  */
2085                 return glfs_fremovexattr(glfd, name);
2086         } else {
2087                 /*
2088                  * This is no longer a handle based call.
2089                  */
2090                 return glfs_removexattr(handle->data,
2091                                 fsp->fsp_name->base_name,
2092                                 name);
2093         }
2094 }
2095
2096 static int vfs_gluster_fsetxattr(struct vfs_handle_struct *handle,
2097                                  files_struct *fsp, const char *name,
2098                                  const void *value, size_t size, int flags)
2099 {
2100         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
2101         if (glfd == NULL) {
2102                 DBG_ERR("Failed to fetch gluster fd\n");
2103                 return -1;
2104         }
2105
2106         if (!fsp->fsp_flags.is_pathref) {
2107                 /*
2108                  * We can use an io_fd to set xattrs.
2109                  */
2110                 return glfs_fsetxattr(glfd, name, value, size, flags);
2111         } else {
2112                 /*
2113                  * This is no longer a handle based call.
2114                  */
2115                 return glfs_setxattr(handle->data,
2116                                 fsp->fsp_name->base_name,
2117                                 name,
2118                                 value,
2119                                 size,
2120                                 flags);
2121         }
2122 }
2123
2124 /* AIO Operations */
2125
2126 static bool vfs_gluster_aio_force(struct vfs_handle_struct *handle,
2127                                   files_struct *fsp)
2128 {
2129         return false;
2130 }
2131
2132 static NTSTATUS vfs_gluster_create_dfs_pathat(struct vfs_handle_struct *handle,
2133                                 struct files_struct *dirfsp,
2134                                 const struct smb_filename *smb_fname,
2135                                 const struct referral *reflist,
2136                                 size_t referral_count)
2137 {
2138         TALLOC_CTX *frame = talloc_stackframe();
2139         NTSTATUS status = NT_STATUS_NO_MEMORY;
2140         int ret;
2141         char *msdfs_link = NULL;
2142         struct smb_filename *full_fname = NULL;
2143
2144         full_fname = full_path_from_dirfsp_atname(talloc_tos(),
2145                                                   dirfsp,
2146                                                   smb_fname);
2147         if (full_fname == NULL) {
2148                 goto out;
2149         }
2150
2151         /* Form the msdfs_link contents */
2152         msdfs_link = msdfs_link_string(frame,
2153                                         reflist,
2154                                         referral_count);
2155         if (msdfs_link == NULL) {
2156                 goto out;
2157         }
2158
2159         ret = glfs_symlink(handle->data,
2160                         msdfs_link,
2161                         full_fname->base_name);
2162         if (ret == 0) {
2163                 status = NT_STATUS_OK;
2164         } else {
2165                 status = map_nt_error_from_unix(errno);
2166         }
2167
2168   out:
2169
2170         TALLOC_FREE(frame);
2171         return status;
2172 }
2173
2174 /*
2175  * Read and return the contents of a DFS redirect given a
2176  * pathname. A caller can pass in NULL for ppreflist and
2177  * preferral_count but still determine if this was a
2178  * DFS redirect point by getting NT_STATUS_OK back
2179  * without incurring the overhead of reading and parsing
2180  * the referral contents.
2181  */
2182
2183 static NTSTATUS vfs_gluster_read_dfs_pathat(struct vfs_handle_struct *handle,
2184                                 TALLOC_CTX *mem_ctx,
2185                                 struct files_struct *dirfsp,
2186                                 struct smb_filename *smb_fname,
2187                                 struct referral **ppreflist,
2188                                 size_t *preferral_count)
2189 {
2190         NTSTATUS status = NT_STATUS_NO_MEMORY;
2191         size_t bufsize;
2192         char *link_target = NULL;
2193         int referral_len;
2194         bool ok;
2195 #if defined(HAVE_BROKEN_READLINK)
2196         char link_target_buf[PATH_MAX];
2197 #else
2198         char link_target_buf[7];
2199 #endif
2200         struct stat st;
2201         int ret;
2202
2203         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
2204
2205         if (is_named_stream(smb_fname)) {
2206                 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
2207                 goto err;
2208         }
2209
2210         if (ppreflist == NULL && preferral_count == NULL) {
2211                 /*
2212                  * We're only checking if this is a DFS
2213                  * redirect. We don't need to return data.
2214                  */
2215                 bufsize = sizeof(link_target_buf);
2216                 link_target = link_target_buf;
2217         } else {
2218                 bufsize = PATH_MAX;
2219                 link_target = talloc_array(mem_ctx, char, bufsize);
2220                 if (!link_target) {
2221                         goto err;
2222                 }
2223         }
2224
2225         ret = glfs_lstat(handle->data, smb_fname->base_name, &st);
2226         if (ret < 0) {
2227                 status = map_nt_error_from_unix(errno);
2228                 goto err;
2229         }
2230
2231         referral_len = glfs_readlink(handle->data,
2232                                 smb_fname->base_name,
2233                                 link_target,
2234                                 bufsize - 1);
2235         if (referral_len < 0) {
2236                 if (errno == EINVAL) {
2237                         DBG_INFO("%s is not a link.\n", smb_fname->base_name);
2238                         status = NT_STATUS_OBJECT_TYPE_MISMATCH;
2239                 } else {
2240                         status = map_nt_error_from_unix(errno);
2241                         DBG_ERR("Error reading "
2242                                 "msdfs link %s: %s\n",
2243                                 smb_fname->base_name,
2244                                 strerror(errno));
2245                 }
2246                 goto err;
2247         }
2248         link_target[referral_len] = '\0';
2249
2250         DBG_INFO("%s -> %s\n",
2251                         smb_fname->base_name,
2252                         link_target);
2253
2254         if (!strnequal(link_target, "msdfs:", 6)) {
2255                 status = NT_STATUS_OBJECT_TYPE_MISMATCH;
2256                 goto err;
2257         }
2258
2259         if (ppreflist == NULL && preferral_count == NULL) {
2260                 /* Early return for checking if this is a DFS link. */
2261                 smb_stat_ex_from_stat(&smb_fname->st, &st);
2262                 return NT_STATUS_OK;
2263         }
2264
2265         ok = parse_msdfs_symlink(mem_ctx,
2266                         lp_msdfs_shuffle_referrals(SNUM(handle->conn)),
2267                         link_target,
2268                         ppreflist,
2269                         preferral_count);
2270
2271         if (ok) {
2272                 smb_stat_ex_from_stat(&smb_fname->st, &st);
2273                 status = NT_STATUS_OK;
2274         } else {
2275                 status = NT_STATUS_NO_MEMORY;
2276         }
2277
2278   err:
2279
2280         if (link_target != link_target_buf) {
2281                 TALLOC_FREE(link_target);
2282         }
2283         return status;
2284 }
2285
2286 static struct vfs_fn_pointers glusterfs_fns = {
2287
2288         /* Disk Operations */
2289
2290         .connect_fn = vfs_gluster_connect,
2291         .disconnect_fn = vfs_gluster_disconnect,
2292         .disk_free_fn = vfs_gluster_disk_free,
2293         .get_quota_fn = vfs_gluster_get_quota,
2294         .set_quota_fn = vfs_gluster_set_quota,
2295         .statvfs_fn = vfs_gluster_statvfs,
2296         .fs_capabilities_fn = vfs_gluster_fs_capabilities,
2297
2298         .get_dfs_referrals_fn = NULL,
2299
2300         /* Directory Operations */
2301
2302         .fdopendir_fn = vfs_gluster_fdopendir,
2303         .readdir_fn = vfs_gluster_readdir,
2304         .seekdir_fn = vfs_gluster_seekdir,
2305         .telldir_fn = vfs_gluster_telldir,
2306         .rewind_dir_fn = vfs_gluster_rewinddir,
2307         .mkdirat_fn = vfs_gluster_mkdirat,
2308         .closedir_fn = vfs_gluster_closedir,
2309
2310         /* File Operations */
2311
2312         .openat_fn = vfs_gluster_openat,
2313         .create_file_fn = NULL,
2314         .close_fn = vfs_gluster_close,
2315         .pread_fn = vfs_gluster_pread,
2316         .pread_send_fn = vfs_gluster_pread_send,
2317         .pread_recv_fn = vfs_gluster_pread_recv,
2318         .pwrite_fn = vfs_gluster_pwrite,
2319         .pwrite_send_fn = vfs_gluster_pwrite_send,
2320         .pwrite_recv_fn = vfs_gluster_pwrite_recv,
2321         .lseek_fn = vfs_gluster_lseek,
2322         .sendfile_fn = vfs_gluster_sendfile,
2323         .recvfile_fn = vfs_gluster_recvfile,
2324         .renameat_fn = vfs_gluster_renameat,
2325         .fsync_send_fn = vfs_gluster_fsync_send,
2326         .fsync_recv_fn = vfs_gluster_fsync_recv,
2327
2328         .stat_fn = vfs_gluster_stat,
2329         .fstat_fn = vfs_gluster_fstat,
2330         .lstat_fn = vfs_gluster_lstat,
2331         .get_alloc_size_fn = vfs_gluster_get_alloc_size,
2332         .unlinkat_fn = vfs_gluster_unlinkat,
2333
2334         .fchmod_fn = vfs_gluster_fchmod,
2335         .fchown_fn = vfs_gluster_fchown,
2336         .lchown_fn = vfs_gluster_lchown,
2337         .chdir_fn = vfs_gluster_chdir,
2338         .getwd_fn = vfs_gluster_getwd,
2339         .fntimes_fn = vfs_gluster_fntimes,
2340         .ftruncate_fn = vfs_gluster_ftruncate,
2341         .fallocate_fn = vfs_gluster_fallocate,
2342         .lock_fn = vfs_gluster_lock,
2343         .kernel_flock_fn = vfs_gluster_kernel_flock,
2344         .fcntl_fn = vfs_gluster_fcntl,
2345         .linux_setlease_fn = vfs_gluster_linux_setlease,
2346         .getlock_fn = vfs_gluster_getlock,
2347         .symlinkat_fn = vfs_gluster_symlinkat,
2348         .readlinkat_fn = vfs_gluster_readlinkat,
2349         .linkat_fn = vfs_gluster_linkat,
2350         .mknodat_fn = vfs_gluster_mknodat,
2351         .realpath_fn = vfs_gluster_realpath,
2352         .chflags_fn = vfs_gluster_chflags,
2353         .file_id_create_fn = NULL,
2354         .fstreaminfo_fn = NULL,
2355         .get_real_filename_fn = vfs_gluster_get_real_filename,
2356         .connectpath_fn = vfs_gluster_connectpath,
2357         .create_dfs_pathat_fn = vfs_gluster_create_dfs_pathat,
2358         .read_dfs_pathat_fn = vfs_gluster_read_dfs_pathat,
2359
2360         .brl_lock_windows_fn = NULL,
2361         .brl_unlock_windows_fn = NULL,
2362         .strict_lock_check_fn = NULL,
2363         .translate_name_fn = NULL,
2364         .fsctl_fn = NULL,
2365
2366         /* NT ACL Operations */
2367         .fget_nt_acl_fn = NULL,
2368         .fset_nt_acl_fn = NULL,
2369         .audit_file_fn = NULL,
2370
2371         /* Posix ACL Operations */
2372         .sys_acl_get_fd_fn = posixacl_xattr_acl_get_fd,
2373         .sys_acl_blob_get_fd_fn = posix_sys_acl_blob_get_fd,
2374         .sys_acl_set_fd_fn = posixacl_xattr_acl_set_fd,
2375         .sys_acl_delete_def_fd_fn = posixacl_xattr_acl_delete_def_fd,
2376
2377         /* EA Operations */
2378         .getxattr_fn = vfs_gluster_getxattr,
2379         .getxattrat_send_fn = vfs_not_implemented_getxattrat_send,
2380         .getxattrat_recv_fn = vfs_not_implemented_getxattrat_recv,
2381         .fgetxattr_fn = vfs_gluster_fgetxattr,
2382         .flistxattr_fn = vfs_gluster_flistxattr,
2383         .fremovexattr_fn = vfs_gluster_fremovexattr,
2384         .fsetxattr_fn = vfs_gluster_fsetxattr,
2385
2386         /* AIO Operations */
2387         .aio_force_fn = vfs_gluster_aio_force,
2388
2389         /* Durable handle Operations */
2390         .durable_cookie_fn = NULL,
2391         .durable_disconnect_fn = NULL,
2392         .durable_reconnect_fn = NULL,
2393 };
2394
2395 static_decl_vfs;
2396 NTSTATUS vfs_glusterfs_init(TALLOC_CTX *ctx)
2397 {
2398         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
2399                                 "glusterfs", &glusterfs_fns);
2400 }