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  *   - AIO support\n
  30  *     See, for example \c vfs_aio_linux.c in the \c sourc3/modules directory
  31  *   - sendfile/recvfile support
  32  *
  33  * A Samba VFS module for GlusterFS, based on Gluster's libgfapi.
  34  * This is a "bottom" vfs module (not something to be stacked on top of
  35  * another module), and translates (most) calls to the closest actions
  36  * available in libgfapi.
  37  *
  38  */
  39
  40 #include "includes.h"
  41 #include "smbd/smbd.h"
  42 #include <stdio.h>
  43 #include "api/glfs.h"
  44 #include "lib/util/dlinklist.h"
  45
  46 #define DEFAULT_VOLFILE_SERVER "localhost"
  47
  48 /**
  49  * Helper to convert struct stat to struct stat_ex.
  50  */
  51 static void smb_stat_ex_from_stat(struct stat_ex *dst, const struct stat *src)
  52 {
  53         ZERO_STRUCTP(dst);
  54
  55         dst->st_ex_dev = src->st_dev;
  56         dst->st_ex_ino = src->st_ino;
  57         dst->st_ex_mode = src->st_mode;
  58         dst->st_ex_nlink = src->st_nlink;
  59         dst->st_ex_uid = src->st_uid;
  60         dst->st_ex_gid = src->st_gid;
  61         dst->st_ex_rdev = src->st_rdev;
  62         dst->st_ex_size = src->st_size;
  63         dst->st_ex_atime.tv_sec = src->st_atime;
  64         dst->st_ex_mtime.tv_sec = src->st_mtime;
  65         dst->st_ex_ctime.tv_sec = src->st_ctime;
  66         dst->st_ex_btime.tv_sec = src->st_mtime;
  67         dst->st_ex_blksize = src->st_blksize;
  68         dst->st_ex_blocks = src->st_blocks;
  69 #ifdef STAT_HAVE_NSEC
  70         dst->st_ex_atime.tv_nsec = src->st_atime_nsec;
  71         dst->st_ex_mtime.tv_nsec = src->st_mtime_nsec;
  72         dst->st_ex_ctime.tv_nsec = src->st_ctime_nsec;
  73         dst->st_ex_btime.tv_nsec = src->st_mtime_nsec;
  74 #endif
  75 }
  76
  77 /* pre-opened glfs_t */
  78
  79 static struct glfs_preopened {
  80         char *volume;
  81         char *connectpath;
  82         glfs_t *fs;
  83         int ref;
  84         struct glfs_preopened *next, *prev;
  85 } *glfs_preopened;
  86
  87
  88 static int glfs_set_preopened(const char *volume, const char *connectpath, glfs_t *fs)
  89 {
  90         struct glfs_preopened *entry = NULL;
  91
  92         entry = talloc_zero(NULL, struct glfs_preopened);
  93         if (!entry) {
  94                 errno = ENOMEM;
  95                 return -1;
  96         }
  97
  98         entry->volume = talloc_strdup(entry, volume);
  99         if (!entry->volume) {
 100                 talloc_free(entry);
 101                 errno = ENOMEM;
 102                 return -1;
 103         }
 104
 105         entry->connectpath = talloc_strdup(entry, connectpath);
 106         if (entry->connectpath == NULL) {
 107                 talloc_free(entry);
 108                 errno = ENOMEM;
 109                 return -1;
 110         }
 111
 112         entry->fs = fs;
 113         entry->ref = 1;
 114
 115         DLIST_ADD(glfs_preopened, entry);
 116
 117         return 0;
 118 }
 119
 120 static glfs_t *glfs_find_preopened(const char *volume, const char *connectpath)
 121 {
 122         struct glfs_preopened *entry = NULL;
 123
 124         for (entry = glfs_preopened; entry; entry = entry->next) {
 125                 if (strcmp(entry->volume, volume) == 0 &&
 126                     strcmp(entry->connectpath, connectpath) == 0)
 127                 {
 128                         entry->ref++;
 129                         return entry->fs;
 130                 }
 131         }
 132
 133         return NULL;
 134 }
 135
 136 static void glfs_clear_preopened(glfs_t *fs)
 137 {
 138         struct glfs_preopened *entry = NULL;
 139
 140         for (entry = glfs_preopened; entry; entry = entry->next) {
 141                 if (entry->fs == fs) {
 142                         if (--entry->ref)
 143                                 return;
 144
 145                         DLIST_REMOVE(glfs_preopened, entry);
 146
 147                         glfs_fini(entry->fs);
 148                         talloc_free(entry);
 149                 }
 150         }
 151 }
 152
 153 /* Disk Operations */
 154
 155 static int vfs_gluster_connect(struct vfs_handle_struct *handle,
 156                                const char *service,
 157                                const char *user)
 158 {
 159         const char *volfile_server;
 160         const char *volume;
 161         char *logfile;
 162         int loglevel;
 163         glfs_t *fs = NULL;
 164         TALLOC_CTX *tmp_ctx;
 165         int ret = 0;
 166
 167         tmp_ctx = talloc_new(NULL);
 168         if (tmp_ctx == NULL) {
 169                 ret = -1;
 170                 goto done;
 171         }
 172         logfile = lp_parm_talloc_string(tmp_ctx, SNUM(handle->conn), "glusterfs",
 173                                        "logfile", NULL);
 174
 175         loglevel = lp_parm_int(SNUM(handle->conn), "glusterfs", "loglevel", -1);
 176
 177         volfile_server = lp_parm_const_string(SNUM(handle->conn), "glusterfs",
 178                                                "volfile_server", NULL);
 179         if (volfile_server == NULL) {
 180                 volfile_server = DEFAULT_VOLFILE_SERVER;
 181         }
 182
 183         volume = lp_parm_const_string(SNUM(handle->conn), "glusterfs", "volume",
 184                                       NULL);
 185         if (volume == NULL) {
 186                 volume = service;
 187         }
 188
 189         fs = glfs_find_preopened(volume, handle->conn->connectpath);
 190         if (fs) {
 191                 goto done;
 192         }
 193
 194         fs = glfs_new(volume);
 195         if (fs == NULL) {
 196                 ret = -1;
 197                 goto done;
 198         }
 199
 200         ret = glfs_set_volfile_server(fs, "tcp", volfile_server, 0);
 201         if (ret < 0) {
 202                 DEBUG(0, ("Failed to set volfile_server %s\n", volfile_server));
 203                 goto done;
 204         }
 205
 206         ret = glfs_set_xlator_option(fs, "*-md-cache", "cache-posix-acl",
 207                                      "true");
 208         if (ret < 0) {
 209                 DEBUG(0, ("%s: Failed to set xlator options\n", volume));
 210                 goto done;
 211         }
 212
 213         ret = glfs_set_logging(fs, logfile, loglevel);
 214         if (ret < 0) {
 215                 DEBUG(0, ("%s: Failed to set logfile %s loglevel %d\n",
 216                           volume, logfile, loglevel));
 217                 goto done;
 218         }
 219
 220         ret = glfs_init(fs);
 221         if (ret < 0) {
 222                 DEBUG(0, ("%s: Failed to initialize volume (%s)\n",
 223                           volume, strerror(errno)));
 224                 goto done;
 225         }
 226
 227         ret = glfs_set_preopened(volume, handle->conn->connectpath, fs);
 228         if (ret < 0) {
 229                 DEBUG(0, ("%s: Failed to register volume (%s)\n",
 230                           volume, strerror(errno)));
 231                 goto done;
 232         }
 233 done:
 234         talloc_free(tmp_ctx);
 235         if (ret < 0) {
 236                 if (fs)
 237                         glfs_fini(fs);
 238                 return -1;
 239         } else {
 240                 DEBUG(0, ("%s: Initialized volume from server %s\n",
 241                          volume, volfile_server));
 242                 handle->data = fs;
 243                 return 0;
 244         }
 245 }
 246
 247 static void vfs_gluster_disconnect(struct vfs_handle_struct *handle)
 248 {
 249         glfs_t *fs = NULL;
 250
 251         fs = handle->data;
 252
 253         glfs_clear_preopened(fs);
 254 }
 255
 256 static uint64_t vfs_gluster_disk_free(struct vfs_handle_struct *handle,
 257                                       const char *path, bool small_query,
 258                                       uint64_t *bsize_p, uint64_t *dfree_p,
 259                                       uint64_t *dsize_p)
 260 {
 261         struct statvfs statvfs = { 0, };
 262         int ret;
 263
 264         ret = glfs_statvfs(handle->data, path, &statvfs);
 265         if (ret < 0) {
 266                 return -1;
 267         }
 268
 269         if (bsize_p != NULL) {
 270                 *bsize_p = (uint64_t)statvfs.f_bsize; /* Block size */
 271         }
 272         if (dfree_p != NULL) {
 273                 *dfree_p = (uint64_t)statvfs.f_bavail; /* Available Block units */
 274         }
 275         if (dsize_p != NULL) {
 276                 *dsize_p = (uint64_t)statvfs.f_blocks; /* Total Block units */
 277         }
 278
 279         return (uint64_t)statvfs.f_bavail;
 280 }
 281
 282 static int vfs_gluster_get_quota(struct vfs_handle_struct *handle,
 283                                  enum SMB_QUOTA_TYPE qtype, unid_t id,
 284                                  SMB_DISK_QUOTA *qt)
 285 {
 286         errno = ENOSYS;
 287         return -1;
 288 }
 289
 290 static int
 291 vfs_gluster_set_quota(struct vfs_handle_struct *handle,
 292                       enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt)
 293 {
 294         errno = ENOSYS;
 295         return -1;
 296 }
 297
 298 static int vfs_gluster_statvfs(struct vfs_handle_struct *handle,
 299                                const char *path,
 300                                struct vfs_statvfs_struct *vfs_statvfs)
 301 {
 302         struct statvfs statvfs = { 0, };
 303         int ret;
 304
 305         ret = glfs_statvfs(handle->data, path, &statvfs);
 306         if (ret < 0) {
 307                 DEBUG(0, ("glfs_statvfs(%s) failed: %s\n",
 308                           path, strerror(errno)));
 309                 return -1;
 310         }
 311
 312         ZERO_STRUCTP(vfs_statvfs);
 313
 314         vfs_statvfs->OptimalTransferSize = statvfs.f_frsize;
 315         vfs_statvfs->BlockSize = statvfs.f_bsize;
 316         vfs_statvfs->TotalBlocks = statvfs.f_blocks;
 317         vfs_statvfs->BlocksAvail = statvfs.f_bfree;
 318         vfs_statvfs->UserBlocksAvail = statvfs.f_bavail;
 319         vfs_statvfs->TotalFileNodes = statvfs.f_files;
 320         vfs_statvfs->FreeFileNodes = statvfs.f_ffree;
 321         vfs_statvfs->FsIdentifier = statvfs.f_fsid;
 322         vfs_statvfs->FsCapabilities =
 323             FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
 324
 325         return ret;
 326 }
 327
 328 static uint32_t vfs_gluster_fs_capabilities(struct vfs_handle_struct *handle,
 329                                             enum timestamp_set_resolution *p_ts_res)
 330 {
 331         uint32_t caps = FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
 332
 333 #ifdef STAT_HAVE_NSEC
 334         *p_ts_res = TIMESTAMP_SET_NT_OR_BETTER;
 335 #endif
 336
 337         return caps;
 338 }
 339
 340 static DIR *vfs_gluster_opendir(struct vfs_handle_struct *handle,
 341                                 const char *path, const char *mask,
 342                                 uint32 attributes)
 343 {
 344         glfs_fd_t *fd;
 345
 346         fd = glfs_opendir(handle->data, path);
 347         if (fd == NULL) {
 348                 DEBUG(0, ("glfs_opendir(%s) failed: %s\n",
 349                           path, strerror(errno)));
 350         }
 351
 352         return (DIR *) fd;
 353 }
 354
 355 static DIR *vfs_gluster_fdopendir(struct vfs_handle_struct *handle,
 356                                   files_struct *fsp, const char *mask,
 357                                   uint32 attributes)
 358 {
 359         return (DIR *) *(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp);
 360 }
 361
 362 static int vfs_gluster_closedir(struct vfs_handle_struct *handle, DIR *dirp)
 363 {
 364         return glfs_closedir((void *)dirp);
 365 }
 366
 367 static struct dirent *vfs_gluster_readdir(struct vfs_handle_struct *handle,
 368                                           DIR *dirp, SMB_STRUCT_STAT *sbuf)
 369 {
 370         static char direntbuf[512];
 371         int ret;
 372         struct stat stat;
 373         struct dirent *dirent = 0;
 374
 375         if (sbuf != NULL) {
 376                 ret = glfs_readdirplus_r((void *)dirp, &stat, (void *)direntbuf,
 377                                          &dirent);
 378         } else {
 379                 ret = glfs_readdir_r((void *)dirp, (void *)direntbuf, &dirent);
 380         }
 381
 382         if ((ret < 0) || (dirent == NULL)) {
 383                 return NULL;
 384         }
 385
 386         if (sbuf != NULL) {
 387                 smb_stat_ex_from_stat(sbuf, &stat);
 388         }
 389
 390         return dirent;
 391 }
 392
 393 static long vfs_gluster_telldir(struct vfs_handle_struct *handle, DIR *dirp)
 394 {
 395         return glfs_telldir((void *)dirp);
 396 }
 397
 398 static void vfs_gluster_seekdir(struct vfs_handle_struct *handle, DIR *dirp,
 399                                 long offset)
 400 {
 401         glfs_seekdir((void *)dirp, offset);
 402 }
 403
 404 static void vfs_gluster_rewinddir(struct vfs_handle_struct *handle, DIR *dirp)
 405 {
 406         glfs_seekdir((void *)dirp, 0);
 407 }
 408
 409 static void vfs_gluster_init_search_op(struct vfs_handle_struct *handle,
 410                                        DIR *dirp)
 411 {
 412         return;
 413 }
 414
 415 static int vfs_gluster_mkdir(struct vfs_handle_struct *handle, const char *path,
 416                              mode_t mode)
 417 {
 418         return glfs_mkdir(handle->data, path, mode);
 419 }
 420
 421 static int vfs_gluster_rmdir(struct vfs_handle_struct *handle, const char *path)
 422 {
 423         return glfs_rmdir(handle->data, path);
 424 }
 425
 426 static int vfs_gluster_open(struct vfs_handle_struct *handle,
 427                             struct smb_filename *smb_fname, files_struct *fsp,
 428                             int flags, mode_t mode)
 429 {
 430         glfs_fd_t *glfd;
 431         glfs_fd_t **p_tmp;
 432
 433         if (flags & O_DIRECTORY) {
 434                 glfd = glfs_opendir(handle->data, smb_fname->base_name);
 435         } else if (flags & O_CREAT) {
 436                 glfd = glfs_creat(handle->data, smb_fname->base_name, flags,
 437                                   mode);
 438         } else {
 439                 glfd = glfs_open(handle->data, smb_fname->base_name, flags);
 440         }
 441
 442         if (glfd == NULL) {
 443                 return -1;
 444         }
 445         p_tmp = (glfs_fd_t **)VFS_ADD_FSP_EXTENSION(handle, fsp,
 446                                                           glfs_fd_t *, NULL);
 447         *p_tmp = glfd;
 448         /* An arbitrary value for error reporting, so you know its us. */
 449         return 13371337;
 450 }
 451
 452 static int vfs_gluster_close(struct vfs_handle_struct *handle,
 453                              files_struct *fsp)
 454 {
 455         glfs_fd_t *glfd;
 456         glfd = *(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp);
 457         VFS_REMOVE_FSP_EXTENSION(handle, fsp);
 458         return glfs_close(glfd);
 459 }
 460
 461 static ssize_t vfs_gluster_read(struct vfs_handle_struct *handle,
 462                                 files_struct *fsp, void *data, size_t n)
 463 {
 464         return glfs_read(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), data, n, 0);
 465 }
 466
 467 static ssize_t vfs_gluster_pread(struct vfs_handle_struct *handle,
 468                                  files_struct *fsp, void *data, size_t n,
 469                                  off_t offset)
 470 {
 471         return glfs_pread(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), data, n, offset, 0);
 472 }
 473
 474 static struct tevent_req *vfs_gluster_pread_send(struct vfs_handle_struct
 475                                                  *handle, TALLOC_CTX *mem_ctx,
 476                                                  struct tevent_context *ev,
 477                                                  files_struct *fsp, void *data,
 478                                                  size_t n, off_t offset)
 479 {
 480         errno = ENOTSUP;
 481         return NULL;
 482 }
 483
 484 static ssize_t vfs_gluster_pread_recv(struct tevent_req *req, int *err)
 485 {
 486         errno = ENOTSUP;
 487         return -1;
 488 }
 489
 490 static ssize_t vfs_gluster_write(struct vfs_handle_struct *handle,
 491                                  files_struct *fsp, const void *data, size_t n)
 492 {
 493         return glfs_write(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), data, n, 0);
 494 }
 495
 496 static ssize_t vfs_gluster_pwrite(struct vfs_handle_struct *handle,
 497                                   files_struct *fsp, const void *data,
 498                                   size_t n, off_t offset)
 499 {
 500         return glfs_pwrite(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), data, n, offset, 0);
 501 }
 502
 503 static struct tevent_req *vfs_gluster_pwrite_send(struct vfs_handle_struct
 504                                                   *handle, TALLOC_CTX *mem_ctx,
 505                                                   struct tevent_context *ev,
 506                                                   files_struct *fsp,
 507                                                   const void *data, size_t n,
 508                                                   off_t offset)
 509 {
 510         errno = ENOTSUP;
 511         return NULL;
 512 }
 513
 514 static ssize_t vfs_gluster_pwrite_recv(struct tevent_req *req, int *err)
 515 {
 516         errno = ENOTSUP;
 517         return -1;
 518 }
 519
 520 static off_t vfs_gluster_lseek(struct vfs_handle_struct *handle,
 521                                files_struct *fsp, off_t offset, int whence)
 522 {
 523         return glfs_lseek(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), offset, whence);
 524 }
 525
 526 static ssize_t vfs_gluster_sendfile(struct vfs_handle_struct *handle, int tofd,
 527                                     files_struct *fromfsp,
 528                                     const DATA_BLOB *hdr,
 529                                     off_t offset, size_t n)
 530 {
 531         errno = ENOTSUP;
 532         return -1;
 533 }
 534
 535 static ssize_t vfs_gluster_recvfile(struct vfs_handle_struct *handle,
 536                                     int fromfd, files_struct *tofsp,
 537                                     off_t offset, size_t n)
 538 {
 539         errno = ENOTSUP;
 540         return -1;
 541 }
 542
 543 static int vfs_gluster_rename(struct vfs_handle_struct *handle,
 544                               const struct smb_filename *smb_fname_src,
 545                               const struct smb_filename *smb_fname_dst)
 546 {
 547         return glfs_rename(handle->data, smb_fname_src->base_name,
 548                            smb_fname_dst->base_name);
 549 }
 550
 551 static int vfs_gluster_fsync(struct vfs_handle_struct *handle,
 552                              files_struct *fsp)
 553 {
 554         return glfs_fsync(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp));
 555 }
 556
 557 static struct tevent_req *vfs_gluster_fsync_send(struct vfs_handle_struct
 558                                                  *handle, TALLOC_CTX *mem_ctx,
 559                                                  struct tevent_context *ev,
 560                                                  files_struct *fsp)
 561 {
 562         errno = ENOTSUP;
 563         return NULL;
 564 }
 565
 566 static int vfs_gluster_fsync_recv(struct tevent_req *req, int *err)
 567 {
 568         errno = ENOTSUP;
 569         return -1;
 570 }
 571
 572 static int vfs_gluster_stat(struct vfs_handle_struct *handle,
 573                             struct smb_filename *smb_fname)
 574 {
 575         struct stat st;
 576         int ret;
 577
 578         ret = glfs_stat(handle->data, smb_fname->base_name, &st);
 579         if (ret == 0) {
 580                 smb_stat_ex_from_stat(&smb_fname->st, &st);
 581         }
 582         if (ret < 0 && errno != ENOENT) {
 583                 DEBUG(0, ("glfs_stat(%s) failed: %s\n",
 584                           smb_fname->base_name, strerror(errno)));
 585         }
 586         return ret;
 587 }
 588
 589 static int vfs_gluster_fstat(struct vfs_handle_struct *handle,
 590                              files_struct *fsp, SMB_STRUCT_STAT *sbuf)
 591 {
 592         struct stat st;
 593         int ret;
 594
 595         ret = glfs_fstat(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), &st);
 596         if (ret == 0) {
 597                 smb_stat_ex_from_stat(sbuf, &st);
 598         }
 599         if (ret < 0) {
 600                 DEBUG(0, ("glfs_fstat(%d) failed: %s\n",
 601                           fsp->fh->fd, strerror(errno)));
 602         }
 603         return ret;
 604 }
 605
 606 static int vfs_gluster_lstat(struct vfs_handle_struct *handle,
 607                              struct smb_filename *smb_fname)
 608 {
 609         struct stat st;
 610         int ret;
 611
 612         ret = glfs_lstat(handle->data, smb_fname->base_name, &st);
 613         if (ret == 0) {
 614                 smb_stat_ex_from_stat(&smb_fname->st, &st);
 615         }
 616         if (ret < 0 && errno != ENOENT) {
 617                 DEBUG(0, ("glfs_lstat(%s) failed: %s\n",
 618                           smb_fname->base_name, strerror(errno)));
 619         }
 620         return ret;
 621 }
 622
 623 static uint64_t vfs_gluster_get_alloc_size(struct vfs_handle_struct *handle,
 624                                            files_struct *fsp,
 625                                            const SMB_STRUCT_STAT *sbuf)
 626 {
 627         return sbuf->st_ex_blocks * 512;
 628 }
 629
 630 static int vfs_gluster_unlink(struct vfs_handle_struct *handle,
 631                               const struct smb_filename *smb_fname)
 632 {
 633         return glfs_unlink(handle->data, smb_fname->base_name);
 634 }
 635
 636 static int vfs_gluster_chmod(struct vfs_handle_struct *handle,
 637                              const char *path, mode_t mode)
 638 {
 639         return glfs_chmod(handle->data, path, mode);
 640 }
 641
 642 static int vfs_gluster_fchmod(struct vfs_handle_struct *handle,
 643                               files_struct *fsp, mode_t mode)
 644 {
 645         return glfs_fchmod(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), mode);
 646 }
 647
 648 static int vfs_gluster_chown(struct vfs_handle_struct *handle,
 649                              const char *path, uid_t uid, gid_t gid)
 650 {
 651         return glfs_chown(handle->data, path, uid, gid);
 652 }
 653
 654 static int vfs_gluster_fchown(struct vfs_handle_struct *handle,
 655                               files_struct *fsp, uid_t uid, gid_t gid)
 656 {
 657         return glfs_fchown(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), uid, gid);
 658 }
 659
 660 static int vfs_gluster_lchown(struct vfs_handle_struct *handle,
 661                               const char *path, uid_t uid, gid_t gid)
 662 {
 663         return glfs_lchown(handle->data, path, uid, gid);
 664 }
 665
 666 static int vfs_gluster_chdir(struct vfs_handle_struct *handle, const char *path)
 667 {
 668         return glfs_chdir(handle->data, path);
 669 }
 670
 671 static char *vfs_gluster_getwd(struct vfs_handle_struct *handle)
 672 {
 673         char *cwd;
 674         char *ret;
 675
 676         cwd = SMB_CALLOC_ARRAY(char, PATH_MAX);
 677         if (cwd == NULL) {
 678                 return NULL;
 679         }
 680
 681         ret = glfs_getcwd(handle->data, cwd, PATH_MAX - 1);
 682         if (ret == 0) {
 683                 free(cwd);
 684         }
 685         return ret;
 686 }
 687
 688 static int vfs_gluster_ntimes(struct vfs_handle_struct *handle,
 689                               const struct smb_filename *smb_fname,
 690                               struct smb_file_time *ft)
 691 {
 692         struct timespec times[2];
 693
 694         if (null_timespec(ft->atime)) {
 695                 times[0].tv_sec = smb_fname->st.st_ex_atime.tv_sec;
 696                 times[0].tv_nsec = smb_fname->st.st_ex_atime.tv_nsec;
 697         } else {
 698                 times[0].tv_sec = ft->atime.tv_sec;
 699                 times[0].tv_nsec = ft->atime.tv_nsec;
 700         }
 701
 702         if (null_timespec(ft->mtime)) {
 703                 times[1].tv_sec = smb_fname->st.st_ex_mtime.tv_sec;
 704                 times[1].tv_nsec = smb_fname->st.st_ex_mtime.tv_nsec;
 705         } else {
 706                 times[1].tv_sec = ft->mtime.tv_sec;
 707                 times[1].tv_nsec = ft->mtime.tv_nsec;
 708         }
 709
 710         if ((timespec_compare(&times[0],
 711                               &smb_fname->st.st_ex_atime) == 0) &&
 712             (timespec_compare(&times[1],
 713                               &smb_fname->st.st_ex_mtime) == 0)) {
 714                 return 0;
 715         }
 716
 717         return glfs_utimens(handle->data, smb_fname->base_name, times);
 718 }
 719
 720 static int vfs_gluster_ftruncate(struct vfs_handle_struct *handle,
 721                                  files_struct *fsp, off_t offset)
 722 {
 723         return glfs_ftruncate(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), offset);
 724 }
 725
 726 static int vfs_gluster_fallocate(struct vfs_handle_struct *handle,
 727                                  struct files_struct *fsp,
 728                                  enum vfs_fallocate_mode mode,
 729                                  off_t offset, off_t len)
 730 {
 731         errno = ENOTSUP;
 732         return -1;
 733 }
 734
 735 static char *vfs_gluster_realpath(struct vfs_handle_struct *handle,
 736                                   const char *path)
 737 {
 738         return glfs_realpath(handle->data, path, 0);
 739 }
 740
 741 static bool vfs_gluster_lock(struct vfs_handle_struct *handle,
 742                              files_struct *fsp, int op, off_t offset,
 743                              off_t count, int type)
 744 {
 745         struct flock flock = { 0, };
 746         int ret;
 747
 748         flock.l_type = type;
 749         flock.l_whence = SEEK_SET;
 750         flock.l_start = offset;
 751         flock.l_len = count;
 752         flock.l_pid = 0;
 753
 754         ret = glfs_posix_lock(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), op, &flock);
 755
 756         if (op == F_GETLK) {
 757                 /* lock query, true if someone else has locked */
 758                 if ((ret != -1) &&
 759                     (flock.l_type != F_UNLCK) &&
 760                     (flock.l_pid != 0) && (flock.l_pid != getpid()))
 761                         return true;
 762                 /* not me */
 763                 return false;
 764         }
 765
 766         if (ret == -1) {
 767                 return false;
 768         }
 769
 770         return true;
 771 }
 772
 773 static int vfs_gluster_kernel_flock(struct vfs_handle_struct *handle,
 774                                     files_struct *fsp, uint32 share_mode,
 775                                     uint32_t access_mask)
 776 {
 777         errno = ENOSYS;
 778         return -1;
 779 }
 780
 781 static int vfs_gluster_linux_setlease(struct vfs_handle_struct *handle,
 782                                       files_struct *fsp, int leasetype)
 783 {
 784         errno = ENOSYS;
 785         return -1;
 786 }
 787
 788 static bool vfs_gluster_getlock(struct vfs_handle_struct *handle,
 789                                 files_struct *fsp, off_t *poffset,
 790                                 off_t *pcount, int *ptype, pid_t *ppid)
 791 {
 792         struct flock flock = { 0, };
 793         int ret;
 794
 795         flock.l_type = *ptype;
 796         flock.l_whence = SEEK_SET;
 797         flock.l_start = *poffset;
 798         flock.l_len = *pcount;
 799         flock.l_pid = 0;
 800
 801         ret = glfs_posix_lock(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), F_GETLK, &flock);
 802
 803         if (ret == -1) {
 804                 return false;
 805         }
 806
 807         *ptype = flock.l_type;
 808         *poffset = flock.l_start;
 809         *pcount = flock.l_len;
 810         *ppid = flock.l_pid;
 811
 812         return true;
 813 }
 814
 815 static int vfs_gluster_symlink(struct vfs_handle_struct *handle,
 816                                const char *oldpath, const char *newpath)
 817 {
 818         return glfs_symlink(handle->data, oldpath, newpath);
 819 }
 820
 821 static int vfs_gluster_readlink(struct vfs_handle_struct *handle,
 822                                 const char *path, char *buf, size_t bufsiz)
 823 {
 824         return glfs_readlink(handle->data, path, buf, bufsiz);
 825 }
 826
 827 static int vfs_gluster_link(struct vfs_handle_struct *handle,
 828                             const char *oldpath, const char *newpath)
 829 {
 830         return glfs_link(handle->data, oldpath, newpath);
 831 }
 832
 833 static int vfs_gluster_mknod(struct vfs_handle_struct *handle, const char *path,
 834                              mode_t mode, SMB_DEV_T dev)
 835 {
 836         return glfs_mknod(handle->data, path, mode, dev);
 837 }
 838
 839 static NTSTATUS vfs_gluster_notify_watch(struct vfs_handle_struct *handle,
 840                                          struct sys_notify_context *ctx,
 841                                          const char *path, uint32_t *filter,
 842                                          uint32_t *subdir_filter,
 843                                          void (*callback) (struct sys_notify_context *ctx,
 844                                                            void *private_data,
 845                                                            struct notify_event *ev),
 846                                          void *private_data, void *handle_p)
 847 {
 848         return NT_STATUS_NOT_IMPLEMENTED;
 849 }
 850
 851 static int vfs_gluster_chflags(struct vfs_handle_struct *handle,
 852                                const char *path, unsigned int flags)
 853 {
 854         errno = ENOSYS;
 855         return -1;
 856 }
 857
 858 static int vfs_gluster_get_real_filename(struct vfs_handle_struct *handle,
 859                                          const char *path, const char *name,
 860                                          TALLOC_CTX *mem_ctx, char **found_name)
 861 {
 862         int ret;
 863         char key_buf[NAME_MAX + 64];
 864         char val_buf[NAME_MAX + 1];
 865
 866         if (strlen(name) >= NAME_MAX) {
 867                 errno = ENAMETOOLONG;
 868                 return -1;
 869         }
 870
 871         snprintf(key_buf, NAME_MAX + 64,
 872                  "user.glusterfs.get_real_filename:%s", name);
 873
 874         ret = glfs_getxattr(handle->data, path, key_buf, val_buf, NAME_MAX + 1);
 875         if (ret == -1) {
 876                 if (errno == ENODATA) {
 877                         errno = EOPNOTSUPP;
 878                 }
 879                 return -1;
 880         }
 881
 882         *found_name = talloc_strdup(mem_ctx, val_buf);
 883         if (found_name[0] == NULL) {
 884                 errno = ENOMEM;
 885                 return -1;
 886         }
 887         return 0;
 888 }
 889
 890 static const char *vfs_gluster_connectpath(struct vfs_handle_struct *handle,
 891                                            const char *filename)
 892 {
 893         return handle->conn->connectpath;
 894 }
 895
 896 /* EA Operations */
 897
 898 static ssize_t vfs_gluster_getxattr(struct vfs_handle_struct *handle,
 899                                     const char *path, const char *name,
 900                                     void *value, size_t size)
 901 {
 902         return glfs_getxattr(handle->data, path, name, value, size);
 903 }
 904
 905 static ssize_t vfs_gluster_fgetxattr(struct vfs_handle_struct *handle,
 906                                      files_struct *fsp, const char *name,
 907                                      void *value, size_t size)
 908 {
 909         return glfs_fgetxattr(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), name, value, size);
 910 }
 911
 912 static ssize_t vfs_gluster_listxattr(struct vfs_handle_struct *handle,
 913                                      const char *path, char *list, size_t size)
 914 {
 915         return glfs_listxattr(handle->data, path, list, size);
 916 }
 917
 918 static ssize_t vfs_gluster_flistxattr(struct vfs_handle_struct *handle,
 919                                       files_struct *fsp, char *list,
 920                                       size_t size)
 921 {
 922         return glfs_flistxattr(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), list, size);
 923 }
 924
 925 static int vfs_gluster_removexattr(struct vfs_handle_struct *handle,
 926                                    const char *path, const char *name)
 927 {
 928         return glfs_removexattr(handle->data, path, name);
 929 }
 930
 931 static int vfs_gluster_fremovexattr(struct vfs_handle_struct *handle,
 932                                     files_struct *fsp, const char *name)
 933 {
 934         return glfs_fremovexattr(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), name);
 935 }
 936
 937 static int vfs_gluster_setxattr(struct vfs_handle_struct *handle,
 938                                 const char *path, const char *name,
 939                                 const void *value, size_t size, int flags)
 940 {
 941         return glfs_setxattr(handle->data, path, name, value, size, flags);
 942 }
 943
 944 static int vfs_gluster_fsetxattr(struct vfs_handle_struct *handle,
 945                                  files_struct *fsp, const char *name,
 946                                  const void *value, size_t size, int flags)
 947 {
 948         return glfs_fsetxattr(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), name, value, size,
 949                               flags);
 950 }
 951
 952 /* AIO Operations */
 953
 954 static bool vfs_gluster_aio_force(struct vfs_handle_struct *handle,
 955                                   files_struct *fsp)
 956 {
 957         return false;
 958 }
 959
 960 /* Offline Operations */
 961
 962 static bool vfs_gluster_is_offline(struct vfs_handle_struct *handle,
 963                                    const struct smb_filename *fname,
 964                                    SMB_STRUCT_STAT *sbuf)
 965 {
 966         return false;
 967 }
 968
 969 static int vfs_gluster_set_offline(struct vfs_handle_struct *handle,
 970                                    const struct smb_filename *fname)
 971 {
 972         errno = ENOTSUP;
 973         return -1;
 974 }
 975
 976 /*
 977   Gluster ACL Format:
 978
 979   Size = 4 (header) + N * 8 (entry)
 980
 981   Offset  Size    Field (Little Endian)
 982   -------------------------------------
 983   0-3     4-byte  Version
 984
 985   4-5     2-byte  Entry-1 tag
 986   6-7     2-byte  Entry-1 perm
 987   8-11    4-byte  Entry-1 id
 988
 989   12-13   2-byte  Entry-2 tag
 990   14-15   2-byte  Entry-2 perm
 991   16-19   4-byte  Entry-2 id
 992
 993   ...
 994
 995  */
 996
 997 /* header version */
 998 #define GLUSTER_ACL_VERSION 2
 999
1000 /* perm bits */
1001 #define GLUSTER_ACL_READ    0x04
1002 #define GLUSTER_ACL_WRITE   0x02
1003 #define GLUSTER_ACL_EXECUTE 0x01
1004
1005 /* tag values */
1006 #define GLUSTER_ACL_UNDEFINED_TAG  0x00
1007 #define GLUSTER_ACL_USER_OBJ       0x01
1008 #define GLUSTER_ACL_USER           0x02
1009 #define GLUSTER_ACL_GROUP_OBJ      0x04
1010 #define GLUSTER_ACL_GROUP          0x08
1011 #define GLUSTER_ACL_MASK           0x10
1012 #define GLUSTER_ACL_OTHER          0x20
1013
1014 #define GLUSTER_ACL_UNDEFINED_ID  (-1)
1015
1016 #define GLUSTER_ACL_HEADER_SIZE    4
1017 #define GLUSTER_ACL_ENTRY_SIZE     8
1018
1019 #define GLUSTER_ACL_SIZE(n)       (GLUSTER_ACL_HEADER_SIZE + (n * GLUSTER_ACL_ENTRY_SIZE))
1020
1021 static SMB_ACL_T gluster_to_smb_acl(const char *buf, size_t xattr_size,
1022                                     TALLOC_CTX *mem_ctx)
1023 {
1024         int count;
1025         size_t size;
1026         struct smb_acl_entry *smb_ace;
1027         struct smb_acl_t *result;
1028         int i;
1029         int offset;
1030         uint16_t tag;
1031         uint16_t perm;
1032         uint32_t id;
1033
1034         size = xattr_size;
1035
1036         if (size < GLUSTER_ACL_HEADER_SIZE) {
1037                 /* ACL should be at least as big as the header (4 bytes) */
1038                 errno = EINVAL;
1039                 return NULL;
1040         }
1041
1042         size -= GLUSTER_ACL_HEADER_SIZE; /* size of header = 4 bytes */
1043
1044         if (size % GLUSTER_ACL_ENTRY_SIZE) {
1045                 /* Size of entries must strictly be a multiple of
1046                    size of an ACE (8 bytes)
1047                 */
1048                 errno = EINVAL;
1049                 return NULL;
1050         }
1051
1052         count = size / GLUSTER_ACL_ENTRY_SIZE;
1053
1054         /* Version is the first 4 bytes of the ACL */
1055         if (IVAL(buf, 0) != GLUSTER_ACL_VERSION) {
1056                 DEBUG(0, ("Unknown gluster ACL version: %d\n",
1057                           IVAL(buf, 0)));
1058                 return NULL;
1059         }
1060         offset = GLUSTER_ACL_HEADER_SIZE;
1061
1062         result = sys_acl_init(mem_ctx);
1063         if (!result) {
1064                 errno = ENOMEM;
1065                 return NULL;
1066         }
1067
1068         result->acl = talloc_array(result, struct smb_acl_entry, count);
1069         if (!result->acl) {
1070                 errno = ENOMEM;
1071                 talloc_free(result);
1072                 return NULL;
1073         }
1074
1075         result->count = count;
1076
1077         smb_ace = result->acl;
1078
1079         for (i = 0; i < count; i++) {
1080                 /* TAG is the first 2 bytes of an entry */
1081                 tag = SVAL(buf, offset);
1082                 offset += 2;
1083
1084                 /* PERM is the next 2 bytes of an entry */
1085                 perm = SVAL(buf, offset);
1086                 offset += 2;
1087
1088                 /* ID is the last 4 bytes of an entry */
1089                 id = IVAL(buf, offset);
1090                 offset += 4;
1091
1092                 switch(tag) {
1093                 case GLUSTER_ACL_USER:
1094                         smb_ace->a_type = SMB_ACL_USER;
1095                         break;
1096                 case GLUSTER_ACL_USER_OBJ:
1097                         smb_ace->a_type = SMB_ACL_USER_OBJ;
1098                         break;
1099                 case GLUSTER_ACL_GROUP:
1100                         smb_ace->a_type = SMB_ACL_GROUP;
1101                         break;
1102                 case GLUSTER_ACL_GROUP_OBJ:
1103                         smb_ace->a_type = SMB_ACL_GROUP_OBJ;
1104                         break;
1105                 case GLUSTER_ACL_OTHER:
1106                         smb_ace->a_type = SMB_ACL_OTHER;
1107                         break;
1108                 case GLUSTER_ACL_MASK:
1109                         smb_ace->a_type = SMB_ACL_MASK;
1110                         break;
1111                 default:
1112                         DEBUG(0, ("unknown tag type %d\n", (unsigned int) tag));
1113                         return NULL;
1114                 }
1115
1116
1117                 switch(smb_ace->a_type) {
1118                 case SMB_ACL_USER:
1119                         smb_ace->info.user.uid = id;
1120                         break;
1121                 case SMB_ACL_GROUP:
1122                         smb_ace->info.group.gid = id;
1123                         break;
1124                 default:
1125                         break;
1126                 }
1127
1128                 smb_ace->a_perm = 0;
1129                 smb_ace->a_perm |=
1130                         ((perm & GLUSTER_ACL_READ) ? SMB_ACL_READ : 0);
1131                 smb_ace->a_perm |=
1132                         ((perm & GLUSTER_ACL_WRITE) ? SMB_ACL_WRITE : 0);
1133                 smb_ace->a_perm |=
1134                         ((perm & GLUSTER_ACL_EXECUTE) ? SMB_ACL_EXECUTE : 0);
1135
1136                 smb_ace++;
1137         }
1138
1139         return result;
1140 }
1141
1142
1143 static int gluster_ace_cmp(const void *left, const void *right)
1144 {
1145         int ret = 0;
1146         uint16_t tag_left, tag_right;
1147         uint32_t id_left, id_right;
1148
1149         /*
1150           Sorting precedence:
1151
1152            - Smaller TAG values must be earlier.
1153
1154            - Within same TAG, smaller identifiers must be earlier, E.g:
1155              UID 0 entry must be earlier than UID 200
1156              GID 17 entry must be earlier than GID 19
1157         */
1158
1159         /* TAG is the first element in the entry */
1160         tag_left = SVAL(left, 0);
1161         tag_right = SVAL(right, 0);
1162
1163         ret = (tag_left - tag_right);
1164         if (!ret) {
1165                 /* ID is the third element in the entry, after two short
1166                    integers (tag and perm), i.e at offset 4.
1167                 */
1168                 id_left = IVAL(left, 4);
1169                 id_right = IVAL(right, 4);
1170                 ret = id_left - id_right;
1171         }
1172
1173         return ret;
1174 }
1175
1176
1177 static ssize_t smb_to_gluster_acl(SMB_ACL_T theacl, char *buf, size_t len)
1178 {
1179         ssize_t size;
1180         struct smb_acl_entry *smb_ace;
1181         int i;
1182         int count;
1183         uint16_t tag;
1184         uint16_t perm;
1185         uint32_t id;
1186         int offset;
1187
1188         count = theacl->count;
1189
1190         size = GLUSTER_ACL_HEADER_SIZE + (count * GLUSTER_ACL_ENTRY_SIZE);
1191         if (!buf) {
1192                 return size;
1193         }
1194
1195         if (len < size) {
1196                 errno = ERANGE;
1197                 return -1;
1198         }
1199
1200         smb_ace = theacl->acl;
1201
1202         /* Version is the first 4 bytes of the ACL */
1203         SIVAL(buf, 0, GLUSTER_ACL_VERSION);
1204         offset = GLUSTER_ACL_HEADER_SIZE;
1205
1206         for (i = 0; i < count; i++) {
1207                 /* Calculate tag */
1208                 switch(smb_ace->a_type) {
1209                 case SMB_ACL_USER:
1210                         tag = GLUSTER_ACL_USER;
1211                         break;
1212                 case SMB_ACL_USER_OBJ:
1213                         tag = GLUSTER_ACL_USER_OBJ;
1214                         break;
1215                 case SMB_ACL_GROUP:
1216                         tag = GLUSTER_ACL_GROUP;
1217                         break;
1218                 case SMB_ACL_GROUP_OBJ:
1219                         tag = GLUSTER_ACL_GROUP_OBJ;
1220                         break;
1221                 case SMB_ACL_OTHER:
1222                         tag = GLUSTER_ACL_OTHER;
1223                         break;
1224                 case SMB_ACL_MASK:
1225                         tag = GLUSTER_ACL_MASK;
1226                         break;
1227                 default:
1228                         DEBUG(0, ("Unknown tag value %d\n",
1229                                   smb_ace->a_type));
1230                         errno = EINVAL;
1231                         return -1;
1232                 }
1233
1234
1235                 /* Calculate id */
1236                 switch(smb_ace->a_type) {
1237                 case SMB_ACL_USER:
1238                         id = smb_ace->info.user.uid;
1239                         break;
1240                 case SMB_ACL_GROUP:
1241                         id = smb_ace->info.group.gid;
1242                         break;
1243                 default:
1244                         id = GLUSTER_ACL_UNDEFINED_ID;
1245                         break;
1246                 }
1247
1248                 /* Calculate perm */
1249                 perm = 0;
1250
1251                 perm |=
1252                         ((smb_ace->a_perm & SMB_ACL_READ) ? GLUSTER_ACL_READ : 0);
1253                 perm |=
1254                         ((smb_ace->a_perm & SMB_ACL_WRITE) ? GLUSTER_ACL_WRITE : 0);
1255                 perm |=
1256                         ((smb_ace->a_perm & SMB_ACL_EXECUTE) ? GLUSTER_ACL_EXECUTE : 0);
1257
1258
1259                 /* TAG is the first 2 bytes of an entry */
1260                 SSVAL(buf, offset, tag);
1261                 offset += 2;
1262
1263                 /* PERM is the next 2 bytes of an entry */
1264                 SSVAL(buf, offset, perm);
1265                 offset += 2;
1266
1267                 /* ID is the last 4 bytes of an entry */
1268                 SIVAL(buf, offset, id);
1269                 offset += 4;
1270
1271                 smb_ace++;
1272         }
1273
1274         /* Skip the header, sort @count number of 8-byte entries */
1275         qsort(buf+GLUSTER_ACL_HEADER_SIZE, count, GLUSTER_ACL_ENTRY_SIZE,
1276               gluster_ace_cmp);
1277
1278         return size;
1279 }
1280
1281
1282 static SMB_ACL_T vfs_gluster_sys_acl_get_file(struct vfs_handle_struct *handle,
1283                                               const char *path_p,
1284                                               SMB_ACL_TYPE_T type,
1285                                               TALLOC_CTX *mem_ctx)
1286 {
1287         struct smb_acl_t *result;
1288         char *buf;
1289         const char *key;
1290         ssize_t ret, size = GLUSTER_ACL_SIZE(20);
1291
1292         switch (type) {
1293         case SMB_ACL_TYPE_ACCESS:
1294                 key = "system.posix_acl_access";
1295                 break;
1296         case SMB_ACL_TYPE_DEFAULT:
1297                 key = "system.posix_acl_default";
1298                 break;
1299         default:
1300                 errno = EINVAL;
1301                 return NULL;
1302         }
1303
1304         buf = alloca(size);
1305         if (!buf) {
1306                 return NULL;
1307         }
1308
1309         ret = glfs_getxattr(handle->data, path_p, key, buf, size);
1310         if (ret == -1 && errno == ERANGE) {
1311                 ret = glfs_getxattr(handle->data, path_p, key, 0, 0);
1312                 if (ret > 0) {
1313                         buf = alloca(ret);
1314                         if (!buf) {
1315                                 return NULL;
1316                         }
1317                         ret = glfs_getxattr(handle->data, path_p, key, buf, ret);
1318                 }
1319         }
1320         if (ret <= 0) {
1321                 return NULL;
1322         }
1323
1324         result = gluster_to_smb_acl(buf, ret, mem_ctx);
1325
1326         return result;
1327 }
1328
1329 static SMB_ACL_T vfs_gluster_sys_acl_get_fd(struct vfs_handle_struct *handle,
1330                                             struct files_struct *fsp,
1331                                             TALLOC_CTX *mem_ctx)
1332 {
1333         struct smb_acl_t *result;
1334         ssize_t ret, size = GLUSTER_ACL_SIZE(20);
1335         char *buf;
1336         glfs_fd_t *glfd;
1337
1338         glfd = *(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1339
1340         buf = alloca(size);
1341         if (!buf) {
1342                 return NULL;
1343         }
1344
1345         ret = glfs_fgetxattr(glfd, "system.posix_acl_access", buf, size);
1346         if (ret == -1 && errno == ERANGE) {
1347                 ret = glfs_fgetxattr(glfd, "system.posix_acl_access", 0, 0);
1348                 if (ret > 0) {
1349                         buf = alloca(ret);
1350                         if (!buf) {
1351                                 return NULL;
1352                         }
1353                         ret = glfs_fgetxattr(glfd, "system.posix_acl_access",
1354                                              buf, ret);
1355                 }
1356         }
1357         if (ret <= 0) {
1358                 return NULL;
1359         }
1360
1361         result = gluster_to_smb_acl(buf, ret, mem_ctx);
1362
1363         return result;
1364 }
1365
1366 static int vfs_gluster_sys_acl_set_file(struct vfs_handle_struct *handle,
1367                                         const char *name,
1368                                         SMB_ACL_TYPE_T acltype,
1369                                         SMB_ACL_T theacl)
1370 {
1371         int ret;
1372         const char *key;
1373         char *buf;
1374         ssize_t size;
1375
1376         switch (acltype) {
1377         case SMB_ACL_TYPE_ACCESS:
1378                 key = "system.posix_acl_access";
1379                 break;
1380         case SMB_ACL_TYPE_DEFAULT:
1381                 key = "system.posix_acl_default";
1382                 break;
1383         default:
1384                 errno = EINVAL;
1385                 return -1;
1386         }
1387
1388         size = smb_to_gluster_acl(theacl, 0, 0);
1389         buf = alloca(size);
1390
1391         size = smb_to_gluster_acl(theacl, buf, size);
1392         if (size == -1) {
1393                 return -1;
1394         }
1395
1396         ret = glfs_setxattr(handle->data, name, key, buf, size, 0);
1397
1398         return ret;
1399 }
1400
1401 static int vfs_gluster_sys_acl_set_fd(struct vfs_handle_struct *handle,
1402                                       struct files_struct *fsp,
1403                                       SMB_ACL_T theacl)
1404 {
1405         int ret;
1406         char *buf;
1407         ssize_t size;
1408
1409         size = smb_to_gluster_acl(theacl, 0, 0);
1410         buf = alloca(size);
1411
1412         size = smb_to_gluster_acl(theacl, buf, size);
1413         if (size == -1) {
1414                 return -1;
1415         }
1416
1417         ret = glfs_fsetxattr(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp),
1418                              "system.posix_acl_access", buf, size, 0);
1419         return ret;
1420 }
1421
1422 static int vfs_gluster_sys_acl_delete_def_file(struct vfs_handle_struct *handle,
1423                                                const char *path)
1424 {
1425         return glfs_removexattr(handle->data, path, "system.posix_acl_default");
1426 }
1427
1428 static struct vfs_fn_pointers glusterfs_fns = {
1429
1430         /* Disk Operations */
1431
1432         .connect_fn = vfs_gluster_connect,
1433         .disconnect_fn = vfs_gluster_disconnect,
1434         .disk_free_fn = vfs_gluster_disk_free,
1435         .get_quota_fn = vfs_gluster_get_quota,
1436         .set_quota_fn = vfs_gluster_set_quota,
1437         .statvfs_fn = vfs_gluster_statvfs,
1438         .fs_capabilities_fn = vfs_gluster_fs_capabilities,
1439
1440         .get_dfs_referrals_fn = NULL,
1441
1442         /* Directory Operations */
1443
1444         .opendir_fn = vfs_gluster_opendir,
1445         .fdopendir_fn = vfs_gluster_fdopendir,
1446         .readdir_fn = vfs_gluster_readdir,
1447         .seekdir_fn = vfs_gluster_seekdir,
1448         .telldir_fn = vfs_gluster_telldir,
1449         .rewind_dir_fn = vfs_gluster_rewinddir,
1450         .mkdir_fn = vfs_gluster_mkdir,
1451         .rmdir_fn = vfs_gluster_rmdir,
1452         .closedir_fn = vfs_gluster_closedir,
1453         .init_search_op_fn = vfs_gluster_init_search_op,
1454
1455         /* File Operations */
1456
1457         .open_fn = vfs_gluster_open,
1458         .create_file_fn = NULL,
1459         .close_fn = vfs_gluster_close,
1460         .read_fn = vfs_gluster_read,
1461         .pread_fn = vfs_gluster_pread,
1462         .pread_send_fn = vfs_gluster_pread_send,
1463         .pread_recv_fn = vfs_gluster_pread_recv,
1464         .write_fn = vfs_gluster_write,
1465         .pwrite_fn = vfs_gluster_pwrite,
1466         .pwrite_send_fn = vfs_gluster_pwrite_send,
1467         .pwrite_recv_fn = vfs_gluster_pwrite_recv,
1468         .lseek_fn = vfs_gluster_lseek,
1469         .sendfile_fn = vfs_gluster_sendfile,
1470         .recvfile_fn = vfs_gluster_recvfile,
1471         .rename_fn = vfs_gluster_rename,
1472         .fsync_fn = vfs_gluster_fsync,
1473         .fsync_send_fn = vfs_gluster_fsync_send,
1474         .fsync_recv_fn = vfs_gluster_fsync_recv,
1475
1476         .stat_fn = vfs_gluster_stat,
1477         .fstat_fn = vfs_gluster_fstat,
1478         .lstat_fn = vfs_gluster_lstat,
1479         .get_alloc_size_fn = vfs_gluster_get_alloc_size,
1480         .unlink_fn = vfs_gluster_unlink,
1481
1482         .chmod_fn = vfs_gluster_chmod,
1483         .fchmod_fn = vfs_gluster_fchmod,
1484         .chown_fn = vfs_gluster_chown,
1485         .fchown_fn = vfs_gluster_fchown,
1486         .lchown_fn = vfs_gluster_lchown,
1487         .chdir_fn = vfs_gluster_chdir,
1488         .getwd_fn = vfs_gluster_getwd,
1489         .ntimes_fn = vfs_gluster_ntimes,
1490         .ftruncate_fn = vfs_gluster_ftruncate,
1491         .fallocate_fn = vfs_gluster_fallocate,
1492         .lock_fn = vfs_gluster_lock,
1493         .kernel_flock_fn = vfs_gluster_kernel_flock,
1494         .linux_setlease_fn = vfs_gluster_linux_setlease,
1495         .getlock_fn = vfs_gluster_getlock,
1496         .symlink_fn = vfs_gluster_symlink,
1497         .readlink_fn = vfs_gluster_readlink,
1498         .link_fn = vfs_gluster_link,
1499         .mknod_fn = vfs_gluster_mknod,
1500         .realpath_fn = vfs_gluster_realpath,
1501         .notify_watch_fn = vfs_gluster_notify_watch,
1502         .chflags_fn = vfs_gluster_chflags,
1503         .file_id_create_fn = NULL,
1504         .copy_chunk_send_fn = NULL,
1505         .copy_chunk_recv_fn = NULL,
1506         .streaminfo_fn = NULL,
1507         .get_real_filename_fn = vfs_gluster_get_real_filename,
1508         .connectpath_fn = vfs_gluster_connectpath,
1509
1510         .brl_lock_windows_fn = NULL,
1511         .brl_unlock_windows_fn = NULL,
1512         .brl_cancel_windows_fn = NULL,
1513         .strict_lock_fn = NULL,
1514         .strict_unlock_fn = NULL,
1515         .translate_name_fn = NULL,
1516         .fsctl_fn = NULL,
1517
1518         /* NT ACL Operations */
1519         .fget_nt_acl_fn = NULL,
1520         .get_nt_acl_fn = NULL,
1521         .fset_nt_acl_fn = NULL,
1522         .audit_file_fn = NULL,
1523
1524         /* Posix ACL Operations */
1525         .chmod_acl_fn = NULL,   /* passthrough to default */
1526         .fchmod_acl_fn = NULL,  /* passthrough to default */
1527         .sys_acl_get_file_fn = vfs_gluster_sys_acl_get_file,
1528         .sys_acl_get_fd_fn = vfs_gluster_sys_acl_get_fd,
1529         .sys_acl_blob_get_file_fn = posix_sys_acl_blob_get_file,
1530         .sys_acl_blob_get_fd_fn = posix_sys_acl_blob_get_fd,
1531         .sys_acl_set_file_fn = vfs_gluster_sys_acl_set_file,
1532         .sys_acl_set_fd_fn = vfs_gluster_sys_acl_set_fd,
1533         .sys_acl_delete_def_file_fn = vfs_gluster_sys_acl_delete_def_file,
1534
1535         /* EA Operations */
1536         .getxattr_fn = vfs_gluster_getxattr,
1537         .fgetxattr_fn = vfs_gluster_fgetxattr,
1538         .listxattr_fn = vfs_gluster_listxattr,
1539         .flistxattr_fn = vfs_gluster_flistxattr,
1540         .removexattr_fn = vfs_gluster_removexattr,
1541         .fremovexattr_fn = vfs_gluster_fremovexattr,
1542         .setxattr_fn = vfs_gluster_setxattr,
1543         .fsetxattr_fn = vfs_gluster_fsetxattr,
1544
1545         /* AIO Operations */
1546         .aio_force_fn = vfs_gluster_aio_force,
1547
1548         /* Offline Operations */
1549         .is_offline_fn = vfs_gluster_is_offline,
1550         .set_offline_fn = vfs_gluster_set_offline,
1551
1552         /* Durable handle Operations */
1553         .durable_cookie_fn = NULL,
1554         .durable_disconnect_fn = NULL,
1555         .durable_reconnect_fn = NULL,
1556 };
1557
1558 NTSTATUS vfs_glusterfs_init(void);
1559 NTSTATUS vfs_glusterfs_init(void)
1560 {
1561         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
1562                                 "glusterfs", &glusterfs_fns);
1563 }