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
  49 #define DEFAULT_VOLFILE_SERVER "localhost"
  50
  51 static int read_fd = -1;
  52 static int write_fd = -1;
  53 static struct tevent_fd *aio_read_event = NULL;
  54
  55 /**
  56  * Helper to convert struct stat to struct stat_ex.
  57  */
  58 static void smb_stat_ex_from_stat(struct stat_ex *dst, const struct stat *src)
  59 {
  60         ZERO_STRUCTP(dst);
  61
  62         dst->st_ex_dev = src->st_dev;
  63         dst->st_ex_ino = src->st_ino;
  64         dst->st_ex_mode = src->st_mode;
  65         dst->st_ex_nlink = src->st_nlink;
  66         dst->st_ex_uid = src->st_uid;
  67         dst->st_ex_gid = src->st_gid;
  68         dst->st_ex_rdev = src->st_rdev;
  69         dst->st_ex_size = src->st_size;
  70         dst->st_ex_atime.tv_sec = src->st_atime;
  71         dst->st_ex_mtime.tv_sec = src->st_mtime;
  72         dst->st_ex_ctime.tv_sec = src->st_ctime;
  73         dst->st_ex_btime.tv_sec = src->st_mtime;
  74         dst->st_ex_blksize = src->st_blksize;
  75         dst->st_ex_blocks = src->st_blocks;
  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 }
  83
  84 /* pre-opened glfs_t */
  85
  86 static struct glfs_preopened {
  87         char *volume;
  88         char *connectpath;
  89         glfs_t *fs;
  90         int ref;
  91         struct glfs_preopened *next, *prev;
  92 } *glfs_preopened;
  93
  94
  95 static int glfs_set_preopened(const char *volume, const char *connectpath, glfs_t *fs)
  96 {
  97         struct glfs_preopened *entry = NULL;
  98
  99         entry = talloc_zero(NULL, struct glfs_preopened);
 100         if (!entry) {
 101                 errno = ENOMEM;
 102                 return -1;
 103         }
 104
 105         entry->volume = talloc_strdup(entry, volume);
 106         if (!entry->volume) {
 107                 talloc_free(entry);
 108                 errno = ENOMEM;
 109                 return -1;
 110         }
 111
 112         entry->connectpath = talloc_strdup(entry, connectpath);
 113         if (entry->connectpath == NULL) {
 114                 talloc_free(entry);
 115                 errno = ENOMEM;
 116                 return -1;
 117         }
 118
 119         entry->fs = fs;
 120         entry->ref = 1;
 121
 122         DLIST_ADD(glfs_preopened, entry);
 123
 124         return 0;
 125 }
 126
 127 static glfs_t *glfs_find_preopened(const char *volume, const char *connectpath)
 128 {
 129         struct glfs_preopened *entry = NULL;
 130
 131         for (entry = glfs_preopened; entry; entry = entry->next) {
 132                 if (strcmp(entry->volume, volume) == 0 &&
 133                     strcmp(entry->connectpath, connectpath) == 0)
 134                 {
 135                         entry->ref++;
 136                         return entry->fs;
 137                 }
 138         }
 139
 140         return NULL;
 141 }
 142
 143 static void glfs_clear_preopened(glfs_t *fs)
 144 {
 145         struct glfs_preopened *entry = NULL;
 146
 147         for (entry = glfs_preopened; entry; entry = entry->next) {
 148                 if (entry->fs == fs) {
 149                         if (--entry->ref)
 150                                 return;
 151
 152                         DLIST_REMOVE(glfs_preopened, entry);
 153
 154                         glfs_fini(entry->fs);
 155                         talloc_free(entry);
 156                 }
 157         }
 158 }
 159
 160 static int vfs_gluster_set_volfile_servers(glfs_t *fs,
 161                                            const char *volfile_servers)
 162 {
 163         char *server = NULL;
 164         int   server_count = 0;
 165         int   server_success = 0;
 166         int   ret = -1;
 167         TALLOC_CTX *frame = talloc_stackframe();
 168
 169         DBG_INFO("servers list %s\n", volfile_servers);
 170
 171         while (next_token_talloc(frame, &volfile_servers, &server, " \t")) {
 172                 char *transport = NULL;
 173                 char *host = NULL;
 174                 int   port = 0;
 175
 176                 server_count++;
 177                 DBG_INFO("server %d %s\n", server_count, server);
 178
 179                 /* Determine the transport type */
 180                 if (strncmp(server, "unix+", 5) == 0) {
 181                         port = 0;
 182                         transport = talloc_strdup(frame, "unix");
 183                         if (!transport) {
 184                                 errno = ENOMEM;
 185                                 goto out;
 186                         }
 187                         host = talloc_strdup(frame, server + 5);
 188                         if (!host) {
 189                                 errno = ENOMEM;
 190                                 goto out;
 191                         }
 192                 } else {
 193                         char *p = NULL;
 194                         char *port_index = NULL;
 195
 196                         if (strncmp(server, "tcp+", 4) == 0) {
 197                                 server += 4;
 198                         }
 199
 200                         /* IPv6 is enclosed in []
 201                          * ':' before ']' is part of IPv6
 202                          * ':' after  ']' indicates port
 203                          */
 204                         p = server;
 205                         if (server[0] == '[') {
 206                                 server++;
 207                                 p = index(server, ']');
 208                                 if (p == NULL) {
 209                                         /* Malformed IPv6 */
 210                                         continue;
 211                                 }
 212                                 p[0] = '\0';
 213                                 p++;
 214                         }
 215
 216                         port_index = index(p, ':');
 217
 218                         if (port_index == NULL) {
 219                                 port = 0;
 220                         } else {
 221                                 port = atoi(port_index + 1);
 222                                 port_index[0] = '\0';
 223                         }
 224                         transport = talloc_strdup(frame, "tcp");
 225                         if (!transport) {
 226                                 errno = ENOMEM;
 227                                 goto out;
 228                         }
 229                         host = talloc_strdup(frame, server);
 230                         if (!host) {
 231                                 errno = ENOMEM;
 232                                 goto out;
 233                         }
 234                 }
 235
 236                 DBG_INFO("Calling set volfile server with params "
 237                          "transport=%s, host=%s, port=%d\n", transport,
 238                           host, port);
 239
 240                 ret = glfs_set_volfile_server(fs, transport, host, port);
 241                 if (ret < 0) {
 242                         DBG_WARNING("Failed to set volfile_server "
 243                                     "transport=%s, host=%s, port=%d (%s)\n",
 244                                     transport, host, port, strerror(errno));
 245                 } else {
 246                         server_success++;
 247                 }
 248         }
 249
 250 out:
 251         if (server_count == 0) {
 252                 ret = -1;
 253         } else if (server_success < server_count) {
 254                 DBG_WARNING("Failed to set %d out of %d servers parsed\n",
 255                             server_count - server_success, server_count);
 256                 ret = 0;
 257         }
 258
 259         TALLOC_FREE(frame);
 260         return ret;
 261 }
 262
 263 /* Disk Operations */
 264
 265 static int vfs_gluster_connect(struct vfs_handle_struct *handle,
 266                                const char *service,
 267                                const char *user)
 268 {
 269         const char *volfile_servers;
 270         const char *volume;
 271         char *logfile;
 272         int loglevel;
 273         glfs_t *fs = NULL;
 274         TALLOC_CTX *tmp_ctx;
 275         int ret = 0;
 276
 277         tmp_ctx = talloc_new(NULL);
 278         if (tmp_ctx == NULL) {
 279                 ret = -1;
 280                 goto done;
 281         }
 282         logfile = lp_parm_talloc_string(tmp_ctx, SNUM(handle->conn), "glusterfs",
 283                                        "logfile", NULL);
 284
 285         loglevel = lp_parm_int(SNUM(handle->conn), "glusterfs", "loglevel", -1);
 286
 287         volfile_servers = lp_parm_talloc_string(tmp_ctx, SNUM(handle->conn),
 288                                                "glusterfs", "volfile_server",
 289                                                NULL);
 290         if (volfile_servers == NULL) {
 291                 volfile_servers = DEFAULT_VOLFILE_SERVER;
 292         }
 293
 294         volume = lp_parm_const_string(SNUM(handle->conn), "glusterfs", "volume",
 295                                       NULL);
 296         if (volume == NULL) {
 297                 volume = service;
 298         }
 299
 300         fs = glfs_find_preopened(volume, handle->conn->connectpath);
 301         if (fs) {
 302                 goto done;
 303         }
 304
 305         fs = glfs_new(volume);
 306         if (fs == NULL) {
 307                 ret = -1;
 308                 goto done;
 309         }
 310
 311         ret = vfs_gluster_set_volfile_servers(fs, volfile_servers);
 312         if (ret < 0) {
 313                 DBG_ERR("Failed to set volfile_servers from list %s\n",
 314                         volfile_servers);
 315                 goto done;
 316         }
 317
 318         ret = glfs_set_xlator_option(fs, "*-md-cache", "cache-posix-acl",
 319                                      "true");
 320         if (ret < 0) {
 321                 DEBUG(0, ("%s: Failed to set xlator options\n", volume));
 322                 goto done;
 323         }
 324
 325
 326         ret = glfs_set_xlator_option(fs, "*-snapview-client",
 327                                      "snapdir-entry-path",
 328                                      handle->conn->connectpath);
 329         if (ret < 0) {
 330                 DEBUG(0, ("%s: Failed to set xlator option:"
 331                           " snapdir-entry-path\n", volume));
 332                 goto done;
 333         }
 334
 335         ret = glfs_set_logging(fs, logfile, loglevel);
 336         if (ret < 0) {
 337                 DEBUG(0, ("%s: Failed to set logfile %s loglevel %d\n",
 338                           volume, logfile, loglevel));
 339                 goto done;
 340         }
 341
 342         ret = glfs_init(fs);
 343         if (ret < 0) {
 344                 DEBUG(0, ("%s: Failed to initialize volume (%s)\n",
 345                           volume, strerror(errno)));
 346                 goto done;
 347         }
 348
 349         ret = glfs_set_preopened(volume, handle->conn->connectpath, fs);
 350         if (ret < 0) {
 351                 DEBUG(0, ("%s: Failed to register volume (%s)\n",
 352                           volume, strerror(errno)));
 353                 goto done;
 354         }
 355
 356         /*
 357          * The shadow_copy2 module will fail to export subdirectories
 358          * of a gluster volume unless we specify the mount point,
 359          * because the detection fails if the file system is not
 360          * locally mounted:
 361          * https://bugzilla.samba.org/show_bug.cgi?id=13091
 362          */
 363         lp_do_parameter(SNUM(handle->conn), "shadow:mountpoint", "/");
 364
 365         /*
 366          * Unless we have an async implementation of getxattrat turn this off.
 367          */
 368         lp_do_parameter(SNUM(handle->conn), "smbd:async dosmode", "false");
 369
 370 done:
 371         if (ret < 0) {
 372                 if (fs)
 373                         glfs_fini(fs);
 374         } else {
 375                 DBG_ERR("%s: Initialized volume from servers %s\n",
 376                         volume, volfile_servers);
 377                 handle->data = fs;
 378         }
 379         talloc_free(tmp_ctx);
 380         return ret;
 381 }
 382
 383 static void vfs_gluster_disconnect(struct vfs_handle_struct *handle)
 384 {
 385         glfs_t *fs = NULL;
 386
 387         fs = handle->data;
 388
 389         glfs_clear_preopened(fs);
 390 }
 391
 392 static uint64_t vfs_gluster_disk_free(struct vfs_handle_struct *handle,
 393                                 const struct smb_filename *smb_fname,
 394                                 uint64_t *bsize_p,
 395                                 uint64_t *dfree_p,
 396                                 uint64_t *dsize_p)
 397 {
 398         struct statvfs statvfs = { 0, };
 399         int ret;
 400
 401         ret = glfs_statvfs(handle->data, smb_fname->base_name, &statvfs);
 402         if (ret < 0) {
 403                 return -1;
 404         }
 405
 406         if (bsize_p != NULL) {
 407                 *bsize_p = (uint64_t)statvfs.f_bsize; /* Block size */
 408         }
 409         if (dfree_p != NULL) {
 410                 *dfree_p = (uint64_t)statvfs.f_bavail; /* Available Block units */
 411         }
 412         if (dsize_p != NULL) {
 413                 *dsize_p = (uint64_t)statvfs.f_blocks; /* Total Block units */
 414         }
 415
 416         return (uint64_t)statvfs.f_bavail;
 417 }
 418
 419 static int vfs_gluster_get_quota(struct vfs_handle_struct *handle,
 420                                 const struct smb_filename *smb_fname,
 421                                 enum SMB_QUOTA_TYPE qtype,
 422                                 unid_t id,
 423                                 SMB_DISK_QUOTA *qt)
 424 {
 425         errno = ENOSYS;
 426         return -1;
 427 }
 428
 429 static int
 430 vfs_gluster_set_quota(struct vfs_handle_struct *handle,
 431                       enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt)
 432 {
 433         errno = ENOSYS;
 434         return -1;
 435 }
 436
 437 static int vfs_gluster_statvfs(struct vfs_handle_struct *handle,
 438                                 const struct smb_filename *smb_fname,
 439                                 struct vfs_statvfs_struct *vfs_statvfs)
 440 {
 441         struct statvfs statvfs = { 0, };
 442         int ret;
 443
 444         ret = glfs_statvfs(handle->data, smb_fname->base_name, &statvfs);
 445         if (ret < 0) {
 446                 DEBUG(0, ("glfs_statvfs(%s) failed: %s\n",
 447                           smb_fname->base_name, strerror(errno)));
 448                 return -1;
 449         }
 450
 451         ZERO_STRUCTP(vfs_statvfs);
 452
 453         vfs_statvfs->OptimalTransferSize = statvfs.f_frsize;
 454         vfs_statvfs->BlockSize = statvfs.f_bsize;
 455         vfs_statvfs->TotalBlocks = statvfs.f_blocks;
 456         vfs_statvfs->BlocksAvail = statvfs.f_bfree;
 457         vfs_statvfs->UserBlocksAvail = statvfs.f_bavail;
 458         vfs_statvfs->TotalFileNodes = statvfs.f_files;
 459         vfs_statvfs->FreeFileNodes = statvfs.f_ffree;
 460         vfs_statvfs->FsIdentifier = statvfs.f_fsid;
 461         vfs_statvfs->FsCapabilities =
 462             FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
 463
 464         return ret;
 465 }
 466
 467 static uint32_t vfs_gluster_fs_capabilities(struct vfs_handle_struct *handle,
 468                                             enum timestamp_set_resolution *p_ts_res)
 469 {
 470         uint32_t caps = FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
 471
 472 #ifdef HAVE_GFAPI_VER_6
 473         caps |= FILE_SUPPORTS_SPARSE_FILES;
 474 #endif
 475
 476 #ifdef STAT_HAVE_NSEC
 477         *p_ts_res = TIMESTAMP_SET_NT_OR_BETTER;
 478 #endif
 479
 480         return caps;
 481 }
 482
 483 static DIR *vfs_gluster_opendir(struct vfs_handle_struct *handle,
 484                                 const struct smb_filename *smb_fname,
 485                                 const char *mask,
 486                                 uint32_t attributes)
 487 {
 488         glfs_fd_t *fd;
 489
 490         fd = glfs_opendir(handle->data, smb_fname->base_name);
 491         if (fd == NULL) {
 492                 DEBUG(0, ("glfs_opendir(%s) failed: %s\n",
 493                           smb_fname->base_name, strerror(errno)));
 494         }
 495
 496         return (DIR *) fd;
 497 }
 498
 499 static glfs_fd_t *vfs_gluster_fetch_glfd(struct vfs_handle_struct *handle,
 500                                          files_struct *fsp)
 501 {
 502         glfs_fd_t **glfd = (glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp);
 503         if (glfd == NULL) {
 504                 DBG_INFO("Failed to fetch fsp extension\n");
 505                 return NULL;
 506         }
 507         if (*glfd == NULL) {
 508                 DBG_INFO("Empty glfs_fd_t pointer\n");
 509                 return NULL;
 510         }
 511
 512         return *glfd;
 513 }
 514
 515 static DIR *vfs_gluster_fdopendir(struct vfs_handle_struct *handle,
 516                                   files_struct *fsp, const char *mask,
 517                                   uint32_t attributes)
 518 {
 519         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
 520         if (glfd == NULL) {
 521                 DBG_ERR("Failed to fetch gluster fd\n");
 522                 return NULL;
 523         }
 524
 525         return (DIR *)glfd;
 526 }
 527
 528 static int vfs_gluster_closedir(struct vfs_handle_struct *handle, DIR *dirp)
 529 {
 530         return glfs_closedir((void *)dirp);
 531 }
 532
 533 static struct dirent *vfs_gluster_readdir(struct vfs_handle_struct *handle,
 534                                           DIR *dirp, SMB_STRUCT_STAT *sbuf)
 535 {
 536         static char direntbuf[512];
 537         int ret;
 538         struct stat stat;
 539         struct dirent *dirent = 0;
 540
 541         if (sbuf != NULL) {
 542                 ret = glfs_readdirplus_r((void *)dirp, &stat, (void *)direntbuf,
 543                                          &dirent);
 544         } else {
 545                 ret = glfs_readdir_r((void *)dirp, (void *)direntbuf, &dirent);
 546         }
 547
 548         if ((ret < 0) || (dirent == NULL)) {
 549                 return NULL;
 550         }
 551
 552         if (sbuf != NULL) {
 553                 smb_stat_ex_from_stat(sbuf, &stat);
 554         }
 555
 556         return dirent;
 557 }
 558
 559 static long vfs_gluster_telldir(struct vfs_handle_struct *handle, DIR *dirp)
 560 {
 561         return glfs_telldir((void *)dirp);
 562 }
 563
 564 static void vfs_gluster_seekdir(struct vfs_handle_struct *handle, DIR *dirp,
 565                                 long offset)
 566 {
 567         glfs_seekdir((void *)dirp, offset);
 568 }
 569
 570 static void vfs_gluster_rewinddir(struct vfs_handle_struct *handle, DIR *dirp)
 571 {
 572         glfs_seekdir((void *)dirp, 0);
 573 }
 574
 575 static int vfs_gluster_mkdir(struct vfs_handle_struct *handle,
 576                              const struct smb_filename *smb_fname,
 577                              mode_t mode)
 578 {
 579         return glfs_mkdir(handle->data, smb_fname->base_name, mode);
 580 }
 581
 582 static int vfs_gluster_rmdir(struct vfs_handle_struct *handle,
 583                         const struct smb_filename *smb_fname)
 584 {
 585         return glfs_rmdir(handle->data, smb_fname->base_name);
 586 }
 587
 588 static int vfs_gluster_open(struct vfs_handle_struct *handle,
 589                             struct smb_filename *smb_fname, files_struct *fsp,
 590                             int flags, mode_t mode)
 591 {
 592         glfs_fd_t *glfd;
 593         glfs_fd_t **p_tmp;
 594
 595         if (flags & O_DIRECTORY) {
 596                 glfd = glfs_opendir(handle->data, smb_fname->base_name);
 597         } else if (flags & O_CREAT) {
 598                 glfd = glfs_creat(handle->data, smb_fname->base_name, flags,
 599                                   mode);
 600         } else {
 601                 glfd = glfs_open(handle->data, smb_fname->base_name, flags);
 602         }
 603
 604         if (glfd == NULL) {
 605                 return -1;
 606         }
 607         p_tmp = VFS_ADD_FSP_EXTENSION(handle, fsp, glfs_fd_t *, NULL);
 608         *p_tmp = glfd;
 609         /* An arbitrary value for error reporting, so you know its us. */
 610         return 13371337;
 611 }
 612
 613 static int vfs_gluster_close(struct vfs_handle_struct *handle,
 614                              files_struct *fsp)
 615 {
 616         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
 617         if (glfd == NULL) {
 618                 DBG_ERR("Failed to fetch gluster fd\n");
 619                 return -1;
 620         }
 621
 622         VFS_REMOVE_FSP_EXTENSION(handle, fsp);
 623         return glfs_close(glfd);
 624 }
 625
 626 static ssize_t vfs_gluster_pread(struct vfs_handle_struct *handle,
 627                                  files_struct *fsp, void *data, size_t n,
 628                                  off_t offset)
 629 {
 630         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
 631         if (glfd == NULL) {
 632                 DBG_ERR("Failed to fetch gluster fd\n");
 633                 return -1;
 634         }
 635
 636 #ifdef HAVE_GFAPI_VER_7_6
 637         return glfs_pread(glfd, data, n, offset, 0, NULL);
 638 #else
 639         return glfs_pread(glfd, data, n, offset, 0);
 640 #endif
 641 }
 642
 643 struct glusterfs_aio_state;
 644
 645 struct glusterfs_aio_wrapper {
 646         struct glusterfs_aio_state *state;
 647 };
 648
 649 struct glusterfs_aio_state {
 650         ssize_t ret;
 651         struct tevent_req *req;
 652         bool cancelled;
 653         struct vfs_aio_state vfs_aio_state;
 654         struct timespec start;
 655 };
 656
 657 static int aio_wrapper_destructor(struct glusterfs_aio_wrapper *wrap)
 658 {
 659         if (wrap->state != NULL) {
 660                 wrap->state->cancelled = true;
 661         }
 662
 663         return 0;
 664 }
 665
 666 /*
 667  * This function is the callback that will be called on glusterfs
 668  * threads once the async IO submitted is complete. To notify
 669  * Samba of the completion we use a pipe based queue.
 670  */
 671 #ifdef HAVE_GFAPI_VER_7_6
 672 static void aio_glusterfs_done(glfs_fd_t *fd, ssize_t ret,
 673                                struct glfs_stat *prestat,
 674                                struct glfs_stat *poststat,
 675                                void *data)
 676 #else
 677 static void aio_glusterfs_done(glfs_fd_t *fd, ssize_t ret, void *data)
 678 #endif
 679 {
 680         struct glusterfs_aio_state *state = NULL;
 681         int sts = 0;
 682         struct timespec end;
 683
 684         state = (struct glusterfs_aio_state *)data;
 685
 686         PROFILE_TIMESTAMP(&end);
 687
 688         if (ret < 0) {
 689                 state->ret = -1;
 690                 state->vfs_aio_state.error = errno;
 691         } else {
 692                 state->ret = ret;
 693         }
 694         state->vfs_aio_state.duration = nsec_time_diff(&end, &state->start);
 695
 696         /*
 697          * Write the state pointer to glusterfs_aio_state to the
 698          * pipe, so we can call tevent_req_done() from the main thread,
 699          * because tevent_req_done() is not designed to be executed in
 700          * the multithread environment, so tevent_req_done() must be
 701          * executed from the smbd main thread.
 702          *
 703          * write(2) on pipes with sizes under _POSIX_PIPE_BUF
 704          * in size is atomic, without this, the use op pipes in this
 705          * code would not work.
 706          *
 707          * sys_write is a thin enough wrapper around write(2)
 708          * that we can trust it here.
 709          */
 710
 711         sts = sys_write(write_fd, &state, sizeof(struct glusterfs_aio_state *));
 712         if (sts < 0) {
 713                 DEBUG(0,("\nWrite to pipe failed (%s)", strerror(errno)));
 714         }
 715
 716         return;
 717 }
 718
 719 /*
 720  * Read each req off the pipe and process it.
 721  */
 722 static void aio_tevent_fd_done(struct tevent_context *event_ctx,
 723                                 struct tevent_fd *fde,
 724                                 uint16_t flags, void *data)
 725 {
 726         struct tevent_req *req = NULL;
 727         struct glusterfs_aio_state *state = NULL;
 728         int sts = 0;
 729
 730         /*
 731          * read(2) on pipes is atomic if the needed data is available
 732          * in the pipe, per SUS and POSIX.  Because we always write
 733          * to the pipe in sizeof(struct tevent_req *) chunks, we can
 734          * always read in those chunks, atomically.
 735          *
 736          * sys_read is a thin enough wrapper around read(2) that we
 737          * can trust it here.
 738          */
 739
 740         sts = sys_read(read_fd, &state, sizeof(struct glusterfs_aio_state *));
 741
 742         if (sts < 0) {
 743                 DEBUG(0,("\nRead from pipe failed (%s)", strerror(errno)));
 744         }
 745
 746         /* if we've cancelled the op, there is no req, so just clean up. */
 747         if (state->cancelled == true) {
 748                 TALLOC_FREE(state);
 749                 return;
 750         }
 751
 752         req = state->req;
 753
 754         if (req) {
 755                 tevent_req_done(req);
 756         }
 757         return;
 758 }
 759
 760 static bool init_gluster_aio(struct vfs_handle_struct *handle)
 761 {
 762         int fds[2];
 763         int ret = -1;
 764
 765         if (read_fd != -1) {
 766                 /*
 767                  * Already initialized.
 768                  */
 769                 return true;
 770         }
 771
 772         ret = pipe(fds);
 773         if (ret == -1) {
 774                 goto fail;
 775         }
 776
 777         read_fd = fds[0];
 778         write_fd = fds[1];
 779
 780         aio_read_event = tevent_add_fd(handle->conn->sconn->ev_ctx,
 781                                         NULL,
 782                                         read_fd,
 783                                         TEVENT_FD_READ,
 784                                         aio_tevent_fd_done,
 785                                         NULL);
 786         if (aio_read_event == NULL) {
 787                 goto fail;
 788         }
 789
 790         return true;
 791 fail:
 792         TALLOC_FREE(aio_read_event);
 793         if (read_fd != -1) {
 794                 close(read_fd);
 795                 close(write_fd);
 796                 read_fd = -1;
 797                 write_fd = -1;
 798         }
 799         return false;
 800 }
 801
 802 static struct glusterfs_aio_state *aio_state_create(TALLOC_CTX *mem_ctx)
 803 {
 804         struct tevent_req *req = NULL;
 805         struct glusterfs_aio_state *state = NULL;
 806         struct glusterfs_aio_wrapper *wrapper = NULL;
 807
 808         req = tevent_req_create(mem_ctx, &wrapper, struct glusterfs_aio_wrapper);
 809
 810         if (req == NULL) {
 811                 return NULL;
 812         }
 813
 814         state = talloc_zero(NULL, struct glusterfs_aio_state);
 815
 816         if (state == NULL) {
 817                 TALLOC_FREE(req);
 818                 return NULL;
 819         }
 820
 821         talloc_set_destructor(wrapper, aio_wrapper_destructor);
 822         state->cancelled = false;
 823         state->req = req;
 824
 825         wrapper->state = state;
 826
 827         return state;
 828 }
 829
 830 static struct tevent_req *vfs_gluster_pread_send(struct vfs_handle_struct
 831                                                   *handle, TALLOC_CTX *mem_ctx,
 832                                                   struct tevent_context *ev,
 833                                                   files_struct *fsp,
 834                                                   void *data, size_t n,
 835                                                   off_t offset)
 836 {
 837         struct glusterfs_aio_state *state = NULL;
 838         struct tevent_req *req = NULL;
 839         int ret = 0;
 840         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
 841
 842         if (glfd == NULL) {
 843                 DBG_ERR("Failed to fetch gluster fd\n");
 844                 return NULL;
 845         }
 846
 847         state = aio_state_create(mem_ctx);
 848
 849         if (state == NULL) {
 850                 return NULL;
 851         }
 852
 853         req = state->req;
 854
 855         if (!init_gluster_aio(handle)) {
 856                 tevent_req_error(req, EIO);
 857                 return tevent_req_post(req, ev);
 858         }
 859
 860         /*
 861          * aio_glusterfs_done and aio_tevent_fd_done()
 862          * use the raw tevent context. We need to use
 863          * tevent_req_defer_callback() in order to
 864          * use the event context we're started with.
 865          */
 866         tevent_req_defer_callback(req, ev);
 867
 868         PROFILE_TIMESTAMP(&state->start);
 869         ret = glfs_pread_async(glfd, data, n, offset, 0, aio_glusterfs_done,
 870                                 state);
 871         if (ret < 0) {
 872                 tevent_req_error(req, -ret);
 873                 return tevent_req_post(req, ev);
 874         }
 875
 876         return req;
 877 }
 878
 879 static struct tevent_req *vfs_gluster_pwrite_send(struct vfs_handle_struct
 880                                                   *handle, TALLOC_CTX *mem_ctx,
 881                                                   struct tevent_context *ev,
 882                                                   files_struct *fsp,
 883                                                   const void *data, size_t n,
 884                                                   off_t offset)
 885 {
 886         struct glusterfs_aio_state *state = NULL;
 887         struct tevent_req *req = NULL;
 888         int ret = 0;
 889         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
 890
 891         if (glfd == NULL) {
 892                 DBG_ERR("Failed to fetch gluster fd\n");
 893                 return NULL;
 894         }
 895
 896         state = aio_state_create(mem_ctx);
 897
 898         if (state == NULL) {
 899                 return NULL;
 900         }
 901
 902         req = state->req;
 903
 904         if (!init_gluster_aio(handle)) {
 905                 tevent_req_error(req, EIO);
 906                 return tevent_req_post(req, ev);
 907         }
 908
 909         /*
 910          * aio_glusterfs_done and aio_tevent_fd_done()
 911          * use the raw tevent context. We need to use
 912          * tevent_req_defer_callback() in order to
 913          * use the event context we're started with.
 914          */
 915         tevent_req_defer_callback(req, ev);
 916
 917         PROFILE_TIMESTAMP(&state->start);
 918         ret = glfs_pwrite_async(glfd, data, n, offset, 0, aio_glusterfs_done,
 919                                 state);
 920         if (ret < 0) {
 921                 tevent_req_error(req, -ret);
 922                 return tevent_req_post(req, ev);
 923         }
 924
 925         return req;
 926 }
 927
 928 static ssize_t vfs_gluster_recv(struct tevent_req *req,
 929                                 struct vfs_aio_state *vfs_aio_state)
 930 {
 931         struct glusterfs_aio_wrapper *wrapper = NULL;
 932         int ret = 0;
 933
 934         wrapper = tevent_req_data(req, struct glusterfs_aio_wrapper);
 935
 936         if (wrapper == NULL) {
 937                 return -1;
 938         }
 939
 940         if (wrapper->state == NULL) {
 941                 return -1;
 942         }
 943
 944         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
 945                 return -1;
 946         }
 947
 948         *vfs_aio_state = wrapper->state->vfs_aio_state;
 949         ret = wrapper->state->ret;
 950
 951         /* Clean up the state, it is in a NULL context. */
 952
 953         TALLOC_FREE(wrapper->state);
 954
 955         return ret;
 956 }
 957
 958 static ssize_t vfs_gluster_pwrite(struct vfs_handle_struct *handle,
 959                                   files_struct *fsp, const void *data,
 960                                   size_t n, off_t offset)
 961 {
 962         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
 963         if (glfd == NULL) {
 964                 DBG_ERR("Failed to fetch gluster fd\n");
 965                 return -1;
 966         }
 967
 968 #ifdef HAVE_GFAPI_VER_7_6
 969         return glfs_pwrite(glfd, data, n, offset, 0, NULL, NULL);
 970 #else
 971         return glfs_pwrite(glfd, data, n, offset, 0);
 972 #endif
 973 }
 974
 975 static off_t vfs_gluster_lseek(struct vfs_handle_struct *handle,
 976                                files_struct *fsp, off_t offset, int whence)
 977 {
 978         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
 979         if (glfd == NULL) {
 980                 DBG_ERR("Failed to fetch gluster fd\n");
 981                 return -1;
 982         }
 983
 984         return glfs_lseek(glfd, offset, whence);
 985 }
 986
 987 static ssize_t vfs_gluster_sendfile(struct vfs_handle_struct *handle, int tofd,
 988                                     files_struct *fromfsp,
 989                                     const DATA_BLOB *hdr,
 990                                     off_t offset, size_t n)
 991 {
 992         errno = ENOTSUP;
 993         return -1;
 994 }
 995
 996 static ssize_t vfs_gluster_recvfile(struct vfs_handle_struct *handle,
 997                                     int fromfd, files_struct *tofsp,
 998                                     off_t offset, size_t n)
 999 {
1000         errno = ENOTSUP;
1001         return -1;
1002 }
1003
1004 static int vfs_gluster_rename(struct vfs_handle_struct *handle,
1005                               const struct smb_filename *smb_fname_src,
1006                               const struct smb_filename *smb_fname_dst)
1007 {
1008         return glfs_rename(handle->data, smb_fname_src->base_name,
1009                            smb_fname_dst->base_name);
1010 }
1011
1012 static struct tevent_req *vfs_gluster_fsync_send(struct vfs_handle_struct
1013                                                  *handle, TALLOC_CTX *mem_ctx,
1014                                                  struct tevent_context *ev,
1015                                                  files_struct *fsp)
1016 {
1017         struct tevent_req *req = NULL;
1018         struct glusterfs_aio_state *state = NULL;
1019         int ret = 0;
1020         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1021
1022         if (glfd == NULL) {
1023                 DBG_ERR("Failed to fetch gluster fd\n");
1024                 return NULL;
1025         }
1026
1027         state = aio_state_create(mem_ctx);
1028
1029         if (state == NULL) {
1030                 return NULL;
1031         }
1032
1033         req = state->req;
1034
1035         if (!init_gluster_aio(handle)) {
1036                 tevent_req_error(req, EIO);
1037                 return tevent_req_post(req, ev);
1038         }
1039
1040         /*
1041          * aio_glusterfs_done and aio_tevent_fd_done()
1042          * use the raw tevent context. We need to use
1043          * tevent_req_defer_callback() in order to
1044          * use the event context we're started with.
1045          */
1046         tevent_req_defer_callback(req, ev);
1047
1048         PROFILE_TIMESTAMP(&state->start);
1049         ret = glfs_fsync_async(glfd, aio_glusterfs_done, state);
1050         if (ret < 0) {
1051                 tevent_req_error(req, -ret);
1052                 return tevent_req_post(req, ev);
1053         }
1054         return req;
1055 }
1056
1057 static int vfs_gluster_fsync_recv(struct tevent_req *req,
1058                                   struct vfs_aio_state *vfs_aio_state)
1059 {
1060         /*
1061          * Use implicit conversion ssize_t->int
1062          */
1063         return vfs_gluster_recv(req, vfs_aio_state);
1064 }
1065
1066 static int vfs_gluster_stat(struct vfs_handle_struct *handle,
1067                             struct smb_filename *smb_fname)
1068 {
1069         struct stat st;
1070         int ret;
1071
1072         ret = glfs_stat(handle->data, smb_fname->base_name, &st);
1073         if (ret == 0) {
1074                 smb_stat_ex_from_stat(&smb_fname->st, &st);
1075         }
1076         if (ret < 0 && errno != ENOENT) {
1077                 DEBUG(0, ("glfs_stat(%s) failed: %s\n",
1078                           smb_fname->base_name, strerror(errno)));
1079         }
1080         return ret;
1081 }
1082
1083 static int vfs_gluster_fstat(struct vfs_handle_struct *handle,
1084                              files_struct *fsp, SMB_STRUCT_STAT *sbuf)
1085 {
1086         struct stat st;
1087         int ret;
1088         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1089
1090         if (glfd == NULL) {
1091                 DBG_ERR("Failed to fetch gluster fd\n");
1092                 return -1;
1093         }
1094
1095         ret = glfs_fstat(glfd, &st);
1096         if (ret == 0) {
1097                 smb_stat_ex_from_stat(sbuf, &st);
1098         }
1099         if (ret < 0) {
1100                 DEBUG(0, ("glfs_fstat(%d) failed: %s\n",
1101                           fsp->fh->fd, strerror(errno)));
1102         }
1103         return ret;
1104 }
1105
1106 static int vfs_gluster_lstat(struct vfs_handle_struct *handle,
1107                              struct smb_filename *smb_fname)
1108 {
1109         struct stat st;
1110         int ret;
1111
1112         ret = glfs_lstat(handle->data, smb_fname->base_name, &st);
1113         if (ret == 0) {
1114                 smb_stat_ex_from_stat(&smb_fname->st, &st);
1115         }
1116         if (ret < 0 && errno != ENOENT) {
1117                 DEBUG(0, ("glfs_lstat(%s) failed: %s\n",
1118                           smb_fname->base_name, strerror(errno)));
1119         }
1120         return ret;
1121 }
1122
1123 static uint64_t vfs_gluster_get_alloc_size(struct vfs_handle_struct *handle,
1124                                            files_struct *fsp,
1125                                            const SMB_STRUCT_STAT *sbuf)
1126 {
1127         return sbuf->st_ex_blocks * 512;
1128 }
1129
1130 static int vfs_gluster_unlink(struct vfs_handle_struct *handle,
1131                               const struct smb_filename *smb_fname)
1132 {
1133         return glfs_unlink(handle->data, smb_fname->base_name);
1134 }
1135
1136 static int vfs_gluster_chmod(struct vfs_handle_struct *handle,
1137                                 const struct smb_filename *smb_fname,
1138                                 mode_t mode)
1139 {
1140         return glfs_chmod(handle->data, smb_fname->base_name, mode);
1141 }
1142
1143 static int vfs_gluster_fchmod(struct vfs_handle_struct *handle,
1144                               files_struct *fsp, mode_t mode)
1145 {
1146         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1147
1148         if (glfd == NULL) {
1149                 DBG_ERR("Failed to fetch gluster fd\n");
1150                 return -1;
1151         }
1152
1153         return glfs_fchmod(glfd, mode);
1154 }
1155
1156 static int vfs_gluster_chown(struct vfs_handle_struct *handle,
1157                         const struct smb_filename *smb_fname,
1158                         uid_t uid,
1159                         gid_t gid)
1160 {
1161         return glfs_chown(handle->data, smb_fname->base_name, uid, gid);
1162 }
1163
1164 static int vfs_gluster_fchown(struct vfs_handle_struct *handle,
1165                               files_struct *fsp, uid_t uid, gid_t gid)
1166 {
1167         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1168         if (glfd == NULL) {
1169                 DBG_ERR("Failed to fetch gluster fd\n");
1170                 return -1;
1171         }
1172
1173         return glfs_fchown(glfd, uid, gid);
1174 }
1175
1176 static int vfs_gluster_lchown(struct vfs_handle_struct *handle,
1177                         const struct smb_filename *smb_fname,
1178                         uid_t uid,
1179                         gid_t gid)
1180 {
1181         return glfs_lchown(handle->data, smb_fname->base_name, uid, gid);
1182 }
1183
1184 static int vfs_gluster_chdir(struct vfs_handle_struct *handle,
1185                         const struct smb_filename *smb_fname)
1186 {
1187         return glfs_chdir(handle->data, smb_fname->base_name);
1188 }
1189
1190 static struct smb_filename *vfs_gluster_getwd(struct vfs_handle_struct *handle,
1191                                 TALLOC_CTX *ctx)
1192 {
1193         char *cwd;
1194         char *ret;
1195         struct smb_filename *smb_fname = NULL;
1196
1197         cwd = SMB_CALLOC_ARRAY(char, PATH_MAX);
1198         if (cwd == NULL) {
1199                 return NULL;
1200         }
1201
1202         ret = glfs_getcwd(handle->data, cwd, PATH_MAX - 1);
1203         if (ret == NULL) {
1204                 SAFE_FREE(cwd);
1205                 return NULL;
1206         }
1207         smb_fname = synthetic_smb_fname(ctx,
1208                                         ret,
1209                                         NULL,
1210                                         NULL,
1211                                         0);
1212         SAFE_FREE(cwd);
1213         return smb_fname;
1214 }
1215
1216 static int vfs_gluster_ntimes(struct vfs_handle_struct *handle,
1217                               const struct smb_filename *smb_fname,
1218                               struct smb_file_time *ft)
1219 {
1220         struct timespec times[2];
1221
1222         if (null_timespec(ft->atime)) {
1223                 times[0].tv_sec = smb_fname->st.st_ex_atime.tv_sec;
1224                 times[0].tv_nsec = smb_fname->st.st_ex_atime.tv_nsec;
1225         } else {
1226                 times[0].tv_sec = ft->atime.tv_sec;
1227                 times[0].tv_nsec = ft->atime.tv_nsec;
1228         }
1229
1230         if (null_timespec(ft->mtime)) {
1231                 times[1].tv_sec = smb_fname->st.st_ex_mtime.tv_sec;
1232                 times[1].tv_nsec = smb_fname->st.st_ex_mtime.tv_nsec;
1233         } else {
1234                 times[1].tv_sec = ft->mtime.tv_sec;
1235                 times[1].tv_nsec = ft->mtime.tv_nsec;
1236         }
1237
1238         if ((timespec_compare(&times[0],
1239                               &smb_fname->st.st_ex_atime) == 0) &&
1240             (timespec_compare(&times[1],
1241                               &smb_fname->st.st_ex_mtime) == 0)) {
1242                 return 0;
1243         }
1244
1245         return glfs_utimens(handle->data, smb_fname->base_name, times);
1246 }
1247
1248 static int vfs_gluster_ftruncate(struct vfs_handle_struct *handle,
1249                                  files_struct *fsp, off_t offset)
1250 {
1251         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1252         if (glfd == NULL) {
1253                 DBG_ERR("Failed to fetch gluster fd\n");
1254                 return -1;
1255         }
1256
1257 #ifdef HAVE_GFAPI_VER_7_6
1258         return glfs_ftruncate(glfd, offset, NULL, NULL);
1259 #else
1260         return glfs_ftruncate(glfd, offset);
1261 #endif
1262 }
1263
1264 static int vfs_gluster_fallocate(struct vfs_handle_struct *handle,
1265                                  struct files_struct *fsp,
1266                                  uint32_t mode,
1267                                  off_t offset, off_t len)
1268 {
1269 #ifdef HAVE_GFAPI_VER_6
1270         int keep_size, punch_hole;
1271         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1272         if (glfd == NULL) {
1273                 DBG_ERR("Failed to fetch gluster fd\n");
1274                 return -1;
1275         }
1276
1277         keep_size = mode & VFS_FALLOCATE_FL_KEEP_SIZE;
1278         punch_hole = mode & VFS_FALLOCATE_FL_PUNCH_HOLE;
1279
1280         mode &= ~(VFS_FALLOCATE_FL_KEEP_SIZE|VFS_FALLOCATE_FL_PUNCH_HOLE);
1281         if (mode != 0) {
1282                 errno = ENOTSUP;
1283                 return -1;
1284         }
1285
1286         if (punch_hole) {
1287                 return glfs_discard(glfd, offset, len);
1288         }
1289
1290         return glfs_fallocate(glfd, keep_size, offset, len);
1291 #else
1292         errno = ENOTSUP;
1293         return -1;
1294 #endif
1295 }
1296
1297 static struct smb_filename *vfs_gluster_realpath(struct vfs_handle_struct *handle,
1298                                 TALLOC_CTX *ctx,
1299                                 const struct smb_filename *smb_fname)
1300 {
1301         char *result = NULL;
1302         struct smb_filename *result_fname = NULL;
1303         char *resolved_path = SMB_MALLOC_ARRAY(char, PATH_MAX+1);
1304
1305         if (resolved_path == NULL) {
1306                 errno = ENOMEM;
1307                 return NULL;
1308         }
1309
1310         result = glfs_realpath(handle->data,
1311                         smb_fname->base_name,
1312                         resolved_path);
1313         if (result != NULL) {
1314                 result_fname = synthetic_smb_fname(ctx, result, NULL, NULL, 0);
1315         }
1316
1317         SAFE_FREE(resolved_path);
1318         return result_fname;
1319 }
1320
1321 static bool vfs_gluster_lock(struct vfs_handle_struct *handle,
1322                              files_struct *fsp, int op, off_t offset,
1323                              off_t count, int type)
1324 {
1325         struct flock flock = { 0, };
1326         int ret;
1327         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1328         if (glfd == NULL) {
1329                 DBG_ERR("Failed to fetch gluster fd\n");
1330                 return false;
1331         }
1332
1333         flock.l_type = type;
1334         flock.l_whence = SEEK_SET;
1335         flock.l_start = offset;
1336         flock.l_len = count;
1337         flock.l_pid = 0;
1338
1339         ret = glfs_posix_lock(glfd, op, &flock);
1340
1341         if (op == F_GETLK) {
1342                 /* lock query, true if someone else has locked */
1343                 if ((ret != -1) &&
1344                     (flock.l_type != F_UNLCK) &&
1345                     (flock.l_pid != 0) && (flock.l_pid != getpid()))
1346                         return true;
1347                 /* not me */
1348                 return false;
1349         }
1350
1351         if (ret == -1) {
1352                 return false;
1353         }
1354
1355         return true;
1356 }
1357
1358 static int vfs_gluster_kernel_flock(struct vfs_handle_struct *handle,
1359                                     files_struct *fsp, uint32_t share_mode,
1360                                     uint32_t access_mask)
1361 {
1362         errno = ENOSYS;
1363         return -1;
1364 }
1365
1366 static int vfs_gluster_linux_setlease(struct vfs_handle_struct *handle,
1367                                       files_struct *fsp, int leasetype)
1368 {
1369         errno = ENOSYS;
1370         return -1;
1371 }
1372
1373 static bool vfs_gluster_getlock(struct vfs_handle_struct *handle,
1374                                 files_struct *fsp, off_t *poffset,
1375                                 off_t *pcount, int *ptype, pid_t *ppid)
1376 {
1377         struct flock flock = { 0, };
1378         int ret;
1379         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1380         if (glfd == NULL) {
1381                 DBG_ERR("Failed to fetch gluster fd\n");
1382                 return false;
1383         }
1384
1385         flock.l_type = *ptype;
1386         flock.l_whence = SEEK_SET;
1387         flock.l_start = *poffset;
1388         flock.l_len = *pcount;
1389         flock.l_pid = 0;
1390
1391         ret = glfs_posix_lock(glfd, F_GETLK, &flock);
1392
1393         if (ret == -1) {
1394                 return false;
1395         }
1396
1397         *ptype = flock.l_type;
1398         *poffset = flock.l_start;
1399         *pcount = flock.l_len;
1400         *ppid = flock.l_pid;
1401
1402         return true;
1403 }
1404
1405 static int vfs_gluster_symlink(struct vfs_handle_struct *handle,
1406                                 const char *link_target,
1407                                 const struct smb_filename *new_smb_fname)
1408 {
1409         return glfs_symlink(handle->data,
1410                         link_target,
1411                         new_smb_fname->base_name);
1412 }
1413
1414 static int vfs_gluster_readlink(struct vfs_handle_struct *handle,
1415                                 const struct smb_filename *smb_fname,
1416                                 char *buf,
1417                                 size_t bufsiz)
1418 {
1419         return glfs_readlink(handle->data, smb_fname->base_name, buf, bufsiz);
1420 }
1421
1422 static int vfs_gluster_link(struct vfs_handle_struct *handle,
1423                                 const struct smb_filename *old_smb_fname,
1424                                 const struct smb_filename *new_smb_fname)
1425 {
1426         return glfs_link(handle->data,
1427                         old_smb_fname->base_name,
1428                         new_smb_fname->base_name);
1429 }
1430
1431 static int vfs_gluster_mknod(struct vfs_handle_struct *handle,
1432                                 const struct smb_filename *smb_fname,
1433                                 mode_t mode,
1434                                 SMB_DEV_T dev)
1435 {
1436         return glfs_mknod(handle->data, smb_fname->base_name, mode, dev);
1437 }
1438
1439 static int vfs_gluster_chflags(struct vfs_handle_struct *handle,
1440                                 const struct smb_filename *smb_fname,
1441                                 unsigned int flags)
1442 {
1443         errno = ENOSYS;
1444         return -1;
1445 }
1446
1447 static int vfs_gluster_get_real_filename(struct vfs_handle_struct *handle,
1448                                          const char *path, const char *name,
1449                                          TALLOC_CTX *mem_ctx, char **found_name)
1450 {
1451         int ret;
1452         char key_buf[NAME_MAX + 64];
1453         char val_buf[NAME_MAX + 1];
1454
1455         if (strlen(name) >= NAME_MAX) {
1456                 errno = ENAMETOOLONG;
1457                 return -1;
1458         }
1459
1460         snprintf(key_buf, NAME_MAX + 64,
1461                  "glusterfs.get_real_filename:%s", name);
1462
1463         ret = glfs_getxattr(handle->data, path, key_buf, val_buf, NAME_MAX + 1);
1464         if (ret == -1) {
1465                 if (errno == ENOATTR) {
1466                         errno = EOPNOTSUPP;
1467                 }
1468                 return -1;
1469         }
1470
1471         *found_name = talloc_strdup(mem_ctx, val_buf);
1472         if (found_name[0] == NULL) {
1473                 errno = ENOMEM;
1474                 return -1;
1475         }
1476         return 0;
1477 }
1478
1479 static const char *vfs_gluster_connectpath(struct vfs_handle_struct *handle,
1480                                 const struct smb_filename *smb_fname)
1481 {
1482         return handle->conn->connectpath;
1483 }
1484
1485 /* EA Operations */
1486
1487 static ssize_t vfs_gluster_getxattr(struct vfs_handle_struct *handle,
1488                                 const struct smb_filename *smb_fname,
1489                                 const char *name,
1490                                 void *value,
1491                                 size_t size)
1492 {
1493         return glfs_getxattr(handle->data, smb_fname->base_name,
1494                         name, value, size);
1495 }
1496
1497 static ssize_t vfs_gluster_fgetxattr(struct vfs_handle_struct *handle,
1498                                      files_struct *fsp, const char *name,
1499                                      void *value, size_t size)
1500 {
1501         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1502         if (glfd == NULL) {
1503                 DBG_ERR("Failed to fetch gluster fd\n");
1504                 return -1;
1505         }
1506
1507         return glfs_fgetxattr(glfd, name, value, size);
1508 }
1509
1510 static ssize_t vfs_gluster_listxattr(struct vfs_handle_struct *handle,
1511                                 const struct smb_filename *smb_fname,
1512                                 char *list,
1513                                 size_t size)
1514 {
1515         return glfs_listxattr(handle->data, smb_fname->base_name, list, size);
1516 }
1517
1518 static ssize_t vfs_gluster_flistxattr(struct vfs_handle_struct *handle,
1519                                       files_struct *fsp, char *list,
1520                                       size_t size)
1521 {
1522         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1523         if (glfd == NULL) {
1524                 DBG_ERR("Failed to fetch gluster fd\n");
1525                 return -1;
1526         }
1527
1528         return glfs_flistxattr(glfd, list, size);
1529 }
1530
1531 static int vfs_gluster_removexattr(struct vfs_handle_struct *handle,
1532                                 const struct smb_filename *smb_fname,
1533                                 const char *name)
1534 {
1535         return glfs_removexattr(handle->data, smb_fname->base_name, name);
1536 }
1537
1538 static int vfs_gluster_fremovexattr(struct vfs_handle_struct *handle,
1539                                     files_struct *fsp, const char *name)
1540 {
1541         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1542         if (glfd == NULL) {
1543                 DBG_ERR("Failed to fetch gluster fd\n");
1544                 return -1;
1545         }
1546
1547         return glfs_fremovexattr(glfd, name);
1548 }
1549
1550 static int vfs_gluster_setxattr(struct vfs_handle_struct *handle,
1551                                 const struct smb_filename *smb_fname,
1552                                 const char *name,
1553                                 const void *value, size_t size, int flags)
1554 {
1555         return glfs_setxattr(handle->data, smb_fname->base_name, name, value, size, flags);
1556 }
1557
1558 static int vfs_gluster_fsetxattr(struct vfs_handle_struct *handle,
1559                                  files_struct *fsp, const char *name,
1560                                  const void *value, size_t size, int flags)
1561 {
1562         glfs_fd_t *glfd = vfs_gluster_fetch_glfd(handle, fsp);
1563         if (glfd == NULL) {
1564                 DBG_ERR("Failed to fetch gluster fd\n");
1565                 return -1;
1566         }
1567
1568         return glfs_fsetxattr(glfd, name, value, size, flags);
1569 }
1570
1571 /* AIO Operations */
1572
1573 static bool vfs_gluster_aio_force(struct vfs_handle_struct *handle,
1574                                   files_struct *fsp)
1575 {
1576         return false;
1577 }
1578
1579 static struct vfs_fn_pointers glusterfs_fns = {
1580
1581         /* Disk Operations */
1582
1583         .connect_fn = vfs_gluster_connect,
1584         .disconnect_fn = vfs_gluster_disconnect,
1585         .disk_free_fn = vfs_gluster_disk_free,
1586         .get_quota_fn = vfs_gluster_get_quota,
1587         .set_quota_fn = vfs_gluster_set_quota,
1588         .statvfs_fn = vfs_gluster_statvfs,
1589         .fs_capabilities_fn = vfs_gluster_fs_capabilities,
1590
1591         .get_dfs_referrals_fn = NULL,
1592
1593         /* Directory Operations */
1594
1595         .opendir_fn = vfs_gluster_opendir,
1596         .fdopendir_fn = vfs_gluster_fdopendir,
1597         .readdir_fn = vfs_gluster_readdir,
1598         .seekdir_fn = vfs_gluster_seekdir,
1599         .telldir_fn = vfs_gluster_telldir,
1600         .rewind_dir_fn = vfs_gluster_rewinddir,
1601         .mkdir_fn = vfs_gluster_mkdir,
1602         .rmdir_fn = vfs_gluster_rmdir,
1603         .closedir_fn = vfs_gluster_closedir,
1604
1605         /* File Operations */
1606
1607         .open_fn = vfs_gluster_open,
1608         .create_file_fn = NULL,
1609         .close_fn = vfs_gluster_close,
1610         .pread_fn = vfs_gluster_pread,
1611         .pread_send_fn = vfs_gluster_pread_send,
1612         .pread_recv_fn = vfs_gluster_recv,
1613         .pwrite_fn = vfs_gluster_pwrite,
1614         .pwrite_send_fn = vfs_gluster_pwrite_send,
1615         .pwrite_recv_fn = vfs_gluster_recv,
1616         .lseek_fn = vfs_gluster_lseek,
1617         .sendfile_fn = vfs_gluster_sendfile,
1618         .recvfile_fn = vfs_gluster_recvfile,
1619         .rename_fn = vfs_gluster_rename,
1620         .fsync_send_fn = vfs_gluster_fsync_send,
1621         .fsync_recv_fn = vfs_gluster_fsync_recv,
1622
1623         .stat_fn = vfs_gluster_stat,
1624         .fstat_fn = vfs_gluster_fstat,
1625         .lstat_fn = vfs_gluster_lstat,
1626         .get_alloc_size_fn = vfs_gluster_get_alloc_size,
1627         .unlink_fn = vfs_gluster_unlink,
1628
1629         .chmod_fn = vfs_gluster_chmod,
1630         .fchmod_fn = vfs_gluster_fchmod,
1631         .chown_fn = vfs_gluster_chown,
1632         .fchown_fn = vfs_gluster_fchown,
1633         .lchown_fn = vfs_gluster_lchown,
1634         .chdir_fn = vfs_gluster_chdir,
1635         .getwd_fn = vfs_gluster_getwd,
1636         .ntimes_fn = vfs_gluster_ntimes,
1637         .ftruncate_fn = vfs_gluster_ftruncate,
1638         .fallocate_fn = vfs_gluster_fallocate,
1639         .lock_fn = vfs_gluster_lock,
1640         .kernel_flock_fn = vfs_gluster_kernel_flock,
1641         .linux_setlease_fn = vfs_gluster_linux_setlease,
1642         .getlock_fn = vfs_gluster_getlock,
1643         .symlink_fn = vfs_gluster_symlink,
1644         .readlink_fn = vfs_gluster_readlink,
1645         .link_fn = vfs_gluster_link,
1646         .mknod_fn = vfs_gluster_mknod,
1647         .realpath_fn = vfs_gluster_realpath,
1648         .chflags_fn = vfs_gluster_chflags,
1649         .file_id_create_fn = NULL,
1650         .streaminfo_fn = NULL,
1651         .get_real_filename_fn = vfs_gluster_get_real_filename,
1652         .connectpath_fn = vfs_gluster_connectpath,
1653
1654         .brl_lock_windows_fn = NULL,
1655         .brl_unlock_windows_fn = NULL,
1656         .brl_cancel_windows_fn = NULL,
1657         .strict_lock_check_fn = NULL,
1658         .translate_name_fn = NULL,
1659         .fsctl_fn = NULL,
1660
1661         /* NT ACL Operations */
1662         .fget_nt_acl_fn = NULL,
1663         .get_nt_acl_fn = NULL,
1664         .fset_nt_acl_fn = NULL,
1665         .audit_file_fn = NULL,
1666
1667         /* Posix ACL Operations */
1668         .sys_acl_get_file_fn = posixacl_xattr_acl_get_file,
1669         .sys_acl_get_fd_fn = posixacl_xattr_acl_get_fd,
1670         .sys_acl_blob_get_file_fn = posix_sys_acl_blob_get_file,
1671         .sys_acl_blob_get_fd_fn = posix_sys_acl_blob_get_fd,
1672         .sys_acl_set_file_fn = posixacl_xattr_acl_set_file,
1673         .sys_acl_set_fd_fn = posixacl_xattr_acl_set_fd,
1674         .sys_acl_delete_def_file_fn = posixacl_xattr_acl_delete_def_file,
1675
1676         /* EA Operations */
1677         .getxattr_fn = vfs_gluster_getxattr,
1678         .getxattrat_send_fn = vfs_not_implemented_getxattrat_send,
1679         .getxattrat_recv_fn = vfs_not_implemented_getxattrat_recv,
1680         .fgetxattr_fn = vfs_gluster_fgetxattr,
1681         .listxattr_fn = vfs_gluster_listxattr,
1682         .flistxattr_fn = vfs_gluster_flistxattr,
1683         .removexattr_fn = vfs_gluster_removexattr,
1684         .fremovexattr_fn = vfs_gluster_fremovexattr,
1685         .setxattr_fn = vfs_gluster_setxattr,
1686         .fsetxattr_fn = vfs_gluster_fsetxattr,
1687
1688         /* AIO Operations */
1689         .aio_force_fn = vfs_gluster_aio_force,
1690
1691         /* Durable handle Operations */
1692         .durable_cookie_fn = NULL,
1693         .durable_disconnect_fn = NULL,
1694         .durable_reconnect_fn = NULL,
1695 };
1696
1697 static_decl_vfs;
1698 NTSTATUS vfs_glusterfs_init(TALLOC_CTX *ctx)
1699 {
1700         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
1701                                 "glusterfs", &glusterfs_fns);
1702 }