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
 214         ret = glfs_set_xlator_option(fs, "*-snapview-client",
 215                                      "snapdir-entry-path",
 216                                      handle->conn->connectpath);
 217         if (ret < 0) {
 218                 DEBUG(0, ("%s: Failed to set xlator option:"
 219                           " snapdir-entry-path\n", volume));
 220                 glfs_fini(fs);
 221                 return -1;
 222         }
 223
 224         ret = glfs_set_logging(fs, logfile, loglevel);
 225         if (ret < 0) {
 226                 DEBUG(0, ("%s: Failed to set logfile %s loglevel %d\n",
 227                           volume, logfile, loglevel));
 228                 goto done;
 229         }
 230
 231         ret = glfs_init(fs);
 232         if (ret < 0) {
 233                 DEBUG(0, ("%s: Failed to initialize volume (%s)\n",
 234                           volume, strerror(errno)));
 235                 goto done;
 236         }
 237
 238         ret = glfs_set_preopened(volume, handle->conn->connectpath, fs);
 239         if (ret < 0) {
 240                 DEBUG(0, ("%s: Failed to register volume (%s)\n",
 241                           volume, strerror(errno)));
 242                 goto done;
 243         }
 244 done:
 245         talloc_free(tmp_ctx);
 246         if (ret < 0) {
 247                 if (fs)
 248                         glfs_fini(fs);
 249                 return -1;
 250         } else {
 251                 DEBUG(0, ("%s: Initialized volume from server %s\n",
 252                          volume, volfile_server));
 253                 handle->data = fs;
 254                 return 0;
 255         }
 256 }
 257
 258 static void vfs_gluster_disconnect(struct vfs_handle_struct *handle)
 259 {
 260         glfs_t *fs = NULL;
 261
 262         fs = handle->data;
 263
 264         glfs_clear_preopened(fs);
 265 }
 266
 267 static uint64_t vfs_gluster_disk_free(struct vfs_handle_struct *handle,
 268                                       const char *path, bool small_query,
 269                                       uint64_t *bsize_p, uint64_t *dfree_p,
 270                                       uint64_t *dsize_p)
 271 {
 272         struct statvfs statvfs = { 0, };
 273         int ret;
 274
 275         ret = glfs_statvfs(handle->data, path, &statvfs);
 276         if (ret < 0) {
 277                 return -1;
 278         }
 279
 280         if (bsize_p != NULL) {
 281                 *bsize_p = (uint64_t)statvfs.f_bsize; /* Block size */
 282         }
 283         if (dfree_p != NULL) {
 284                 *dfree_p = (uint64_t)statvfs.f_bavail; /* Available Block units */
 285         }
 286         if (dsize_p != NULL) {
 287                 *dsize_p = (uint64_t)statvfs.f_blocks; /* Total Block units */
 288         }
 289
 290         return (uint64_t)statvfs.f_bavail;
 291 }
 292
 293 static int vfs_gluster_get_quota(struct vfs_handle_struct *handle,
 294                                  enum SMB_QUOTA_TYPE qtype, unid_t id,
 295                                  SMB_DISK_QUOTA *qt)
 296 {
 297         errno = ENOSYS;
 298         return -1;
 299 }
 300
 301 static int
 302 vfs_gluster_set_quota(struct vfs_handle_struct *handle,
 303                       enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt)
 304 {
 305         errno = ENOSYS;
 306         return -1;
 307 }
 308
 309 static int vfs_gluster_statvfs(struct vfs_handle_struct *handle,
 310                                const char *path,
 311                                struct vfs_statvfs_struct *vfs_statvfs)
 312 {
 313         struct statvfs statvfs = { 0, };
 314         int ret;
 315
 316         ret = glfs_statvfs(handle->data, path, &statvfs);
 317         if (ret < 0) {
 318                 DEBUG(0, ("glfs_statvfs(%s) failed: %s\n",
 319                           path, strerror(errno)));
 320                 return -1;
 321         }
 322
 323         ZERO_STRUCTP(vfs_statvfs);
 324
 325         vfs_statvfs->OptimalTransferSize = statvfs.f_frsize;
 326         vfs_statvfs->BlockSize = statvfs.f_bsize;
 327         vfs_statvfs->TotalBlocks = statvfs.f_blocks;
 328         vfs_statvfs->BlocksAvail = statvfs.f_bfree;
 329         vfs_statvfs->UserBlocksAvail = statvfs.f_bavail;
 330         vfs_statvfs->TotalFileNodes = statvfs.f_files;
 331         vfs_statvfs->FreeFileNodes = statvfs.f_ffree;
 332         vfs_statvfs->FsIdentifier = statvfs.f_fsid;
 333         vfs_statvfs->FsCapabilities =
 334             FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
 335
 336         return ret;
 337 }
 338
 339 static uint32_t vfs_gluster_fs_capabilities(struct vfs_handle_struct *handle,
 340                                             enum timestamp_set_resolution *p_ts_res)
 341 {
 342         uint32_t caps = FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
 343
 344 #ifdef STAT_HAVE_NSEC
 345         *p_ts_res = TIMESTAMP_SET_NT_OR_BETTER;
 346 #endif
 347
 348         return caps;
 349 }
 350
 351 static DIR *vfs_gluster_opendir(struct vfs_handle_struct *handle,
 352                                 const char *path, const char *mask,
 353                                 uint32 attributes)
 354 {
 355         glfs_fd_t *fd;
 356
 357         fd = glfs_opendir(handle->data, path);
 358         if (fd == NULL) {
 359                 DEBUG(0, ("glfs_opendir(%s) failed: %s\n",
 360                           path, strerror(errno)));
 361         }
 362
 363         return (DIR *) fd;
 364 }
 365
 366 static DIR *vfs_gluster_fdopendir(struct vfs_handle_struct *handle,
 367                                   files_struct *fsp, const char *mask,
 368                                   uint32 attributes)
 369 {
 370         return (DIR *) *(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp);
 371 }
 372
 373 static int vfs_gluster_closedir(struct vfs_handle_struct *handle, DIR *dirp)
 374 {
 375         return glfs_closedir((void *)dirp);
 376 }
 377
 378 static struct dirent *vfs_gluster_readdir(struct vfs_handle_struct *handle,
 379                                           DIR *dirp, SMB_STRUCT_STAT *sbuf)
 380 {
 381         static char direntbuf[512];
 382         int ret;
 383         struct stat stat;
 384         struct dirent *dirent = 0;
 385
 386         if (sbuf != NULL) {
 387                 ret = glfs_readdirplus_r((void *)dirp, &stat, (void *)direntbuf,
 388                                          &dirent);
 389         } else {
 390                 ret = glfs_readdir_r((void *)dirp, (void *)direntbuf, &dirent);
 391         }
 392
 393         if ((ret < 0) || (dirent == NULL)) {
 394                 return NULL;
 395         }
 396
 397         if (sbuf != NULL) {
 398                 smb_stat_ex_from_stat(sbuf, &stat);
 399         }
 400
 401         return dirent;
 402 }
 403
 404 static long vfs_gluster_telldir(struct vfs_handle_struct *handle, DIR *dirp)
 405 {
 406         return glfs_telldir((void *)dirp);
 407 }
 408
 409 static void vfs_gluster_seekdir(struct vfs_handle_struct *handle, DIR *dirp,
 410                                 long offset)
 411 {
 412         glfs_seekdir((void *)dirp, offset);
 413 }
 414
 415 static void vfs_gluster_rewinddir(struct vfs_handle_struct *handle, DIR *dirp)
 416 {
 417         glfs_seekdir((void *)dirp, 0);
 418 }
 419
 420 static void vfs_gluster_init_search_op(struct vfs_handle_struct *handle,
 421                                        DIR *dirp)
 422 {
 423         return;
 424 }
 425
 426 static int vfs_gluster_mkdir(struct vfs_handle_struct *handle, const char *path,
 427                              mode_t mode)
 428 {
 429         return glfs_mkdir(handle->data, path, mode);
 430 }
 431
 432 static int vfs_gluster_rmdir(struct vfs_handle_struct *handle, const char *path)
 433 {
 434         return glfs_rmdir(handle->data, path);
 435 }
 436
 437 static int vfs_gluster_open(struct vfs_handle_struct *handle,
 438                             struct smb_filename *smb_fname, files_struct *fsp,
 439                             int flags, mode_t mode)
 440 {
 441         glfs_fd_t *glfd;
 442         glfs_fd_t **p_tmp;
 443
 444         if (flags & O_DIRECTORY) {
 445                 glfd = glfs_opendir(handle->data, smb_fname->base_name);
 446         } else if (flags & O_CREAT) {
 447                 glfd = glfs_creat(handle->data, smb_fname->base_name, flags,
 448                                   mode);
 449         } else {
 450                 glfd = glfs_open(handle->data, smb_fname->base_name, flags);
 451         }
 452
 453         if (glfd == NULL) {
 454                 return -1;
 455         }
 456         p_tmp = (glfs_fd_t **)VFS_ADD_FSP_EXTENSION(handle, fsp,
 457                                                           glfs_fd_t *, NULL);
 458         *p_tmp = glfd;
 459         /* An arbitrary value for error reporting, so you know its us. */
 460         return 13371337;
 461 }
 462
 463 static int vfs_gluster_close(struct vfs_handle_struct *handle,
 464                              files_struct *fsp)
 465 {
 466         glfs_fd_t *glfd;
 467         glfd = *(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp);
 468         VFS_REMOVE_FSP_EXTENSION(handle, fsp);
 469         return glfs_close(glfd);
 470 }
 471
 472 static ssize_t vfs_gluster_read(struct vfs_handle_struct *handle,
 473                                 files_struct *fsp, void *data, size_t n)
 474 {
 475         return glfs_read(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), data, n, 0);
 476 }
 477
 478 static ssize_t vfs_gluster_pread(struct vfs_handle_struct *handle,
 479                                  files_struct *fsp, void *data, size_t n,
 480                                  off_t offset)
 481 {
 482         return glfs_pread(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), data, n, offset, 0);
 483 }
 484
 485 static struct tevent_req *vfs_gluster_pread_send(struct vfs_handle_struct
 486                                                  *handle, TALLOC_CTX *mem_ctx,
 487                                                  struct tevent_context *ev,
 488                                                  files_struct *fsp, void *data,
 489                                                  size_t n, off_t offset)
 490 {
 491         errno = ENOTSUP;
 492         return NULL;
 493 }
 494
 495 static ssize_t vfs_gluster_pread_recv(struct tevent_req *req, int *err)
 496 {
 497         errno = ENOTSUP;
 498         return -1;
 499 }
 500
 501 static ssize_t vfs_gluster_write(struct vfs_handle_struct *handle,
 502                                  files_struct *fsp, const void *data, size_t n)
 503 {
 504         return glfs_write(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), data, n, 0);
 505 }
 506
 507 static ssize_t vfs_gluster_pwrite(struct vfs_handle_struct *handle,
 508                                   files_struct *fsp, const void *data,
 509                                   size_t n, off_t offset)
 510 {
 511         return glfs_pwrite(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), data, n, offset, 0);
 512 }
 513
 514 static struct tevent_req *vfs_gluster_pwrite_send(struct vfs_handle_struct
 515                                                   *handle, TALLOC_CTX *mem_ctx,
 516                                                   struct tevent_context *ev,
 517                                                   files_struct *fsp,
 518                                                   const void *data, size_t n,
 519                                                   off_t offset)
 520 {
 521         errno = ENOTSUP;
 522         return NULL;
 523 }
 524
 525 static ssize_t vfs_gluster_pwrite_recv(struct tevent_req *req, int *err)
 526 {
 527         errno = ENOTSUP;
 528         return -1;
 529 }
 530
 531 static off_t vfs_gluster_lseek(struct vfs_handle_struct *handle,
 532                                files_struct *fsp, off_t offset, int whence)
 533 {
 534         return glfs_lseek(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), offset, whence);
 535 }
 536
 537 static ssize_t vfs_gluster_sendfile(struct vfs_handle_struct *handle, int tofd,
 538                                     files_struct *fromfsp,
 539                                     const DATA_BLOB *hdr,
 540                                     off_t offset, size_t n)
 541 {
 542         errno = ENOTSUP;
 543         return -1;
 544 }
 545
 546 static ssize_t vfs_gluster_recvfile(struct vfs_handle_struct *handle,
 547                                     int fromfd, files_struct *tofsp,
 548                                     off_t offset, size_t n)
 549 {
 550         errno = ENOTSUP;
 551         return -1;
 552 }
 553
 554 static int vfs_gluster_rename(struct vfs_handle_struct *handle,
 555                               const struct smb_filename *smb_fname_src,
 556                               const struct smb_filename *smb_fname_dst)
 557 {
 558         return glfs_rename(handle->data, smb_fname_src->base_name,
 559                            smb_fname_dst->base_name);
 560 }
 561
 562 static int vfs_gluster_fsync(struct vfs_handle_struct *handle,
 563                              files_struct *fsp)
 564 {
 565         return glfs_fsync(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp));
 566 }
 567
 568 static struct tevent_req *vfs_gluster_fsync_send(struct vfs_handle_struct
 569                                                  *handle, TALLOC_CTX *mem_ctx,
 570                                                  struct tevent_context *ev,
 571                                                  files_struct *fsp)
 572 {
 573         errno = ENOTSUP;
 574         return NULL;
 575 }
 576
 577 static int vfs_gluster_fsync_recv(struct tevent_req *req, int *err)
 578 {
 579         errno = ENOTSUP;
 580         return -1;
 581 }
 582
 583 static int vfs_gluster_stat(struct vfs_handle_struct *handle,
 584                             struct smb_filename *smb_fname)
 585 {
 586         struct stat st;
 587         int ret;
 588
 589         ret = glfs_stat(handle->data, smb_fname->base_name, &st);
 590         if (ret == 0) {
 591                 smb_stat_ex_from_stat(&smb_fname->st, &st);
 592         }
 593         if (ret < 0 && errno != ENOENT) {
 594                 DEBUG(0, ("glfs_stat(%s) failed: %s\n",
 595                           smb_fname->base_name, strerror(errno)));
 596         }
 597         return ret;
 598 }
 599
 600 static int vfs_gluster_fstat(struct vfs_handle_struct *handle,
 601                              files_struct *fsp, SMB_STRUCT_STAT *sbuf)
 602 {
 603         struct stat st;
 604         int ret;
 605
 606         ret = glfs_fstat(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), &st);
 607         if (ret == 0) {
 608                 smb_stat_ex_from_stat(sbuf, &st);
 609         }
 610         if (ret < 0) {
 611                 DEBUG(0, ("glfs_fstat(%d) failed: %s\n",
 612                           fsp->fh->fd, strerror(errno)));
 613         }
 614         return ret;
 615 }
 616
 617 static int vfs_gluster_lstat(struct vfs_handle_struct *handle,
 618                              struct smb_filename *smb_fname)
 619 {
 620         struct stat st;
 621         int ret;
 622
 623         ret = glfs_lstat(handle->data, smb_fname->base_name, &st);
 624         if (ret == 0) {
 625                 smb_stat_ex_from_stat(&smb_fname->st, &st);
 626         }
 627         if (ret < 0 && errno != ENOENT) {
 628                 DEBUG(0, ("glfs_lstat(%s) failed: %s\n",
 629                           smb_fname->base_name, strerror(errno)));
 630         }
 631         return ret;
 632 }
 633
 634 static uint64_t vfs_gluster_get_alloc_size(struct vfs_handle_struct *handle,
 635                                            files_struct *fsp,
 636                                            const SMB_STRUCT_STAT *sbuf)
 637 {
 638         return sbuf->st_ex_blocks * 512;
 639 }
 640
 641 static int vfs_gluster_unlink(struct vfs_handle_struct *handle,
 642                               const struct smb_filename *smb_fname)
 643 {
 644         return glfs_unlink(handle->data, smb_fname->base_name);
 645 }
 646
 647 static int vfs_gluster_chmod(struct vfs_handle_struct *handle,
 648                              const char *path, mode_t mode)
 649 {
 650         return glfs_chmod(handle->data, path, mode);
 651 }
 652
 653 static int vfs_gluster_fchmod(struct vfs_handle_struct *handle,
 654                               files_struct *fsp, mode_t mode)
 655 {
 656         return glfs_fchmod(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), mode);
 657 }
 658
 659 static int vfs_gluster_chown(struct vfs_handle_struct *handle,
 660                              const char *path, uid_t uid, gid_t gid)
 661 {
 662         return glfs_chown(handle->data, path, uid, gid);
 663 }
 664
 665 static int vfs_gluster_fchown(struct vfs_handle_struct *handle,
 666                               files_struct *fsp, uid_t uid, gid_t gid)
 667 {
 668         return glfs_fchown(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), uid, gid);
 669 }
 670
 671 static int vfs_gluster_lchown(struct vfs_handle_struct *handle,
 672                               const char *path, uid_t uid, gid_t gid)
 673 {
 674         return glfs_lchown(handle->data, path, uid, gid);
 675 }
 676
 677 static int vfs_gluster_chdir(struct vfs_handle_struct *handle, const char *path)
 678 {
 679         return glfs_chdir(handle->data, path);
 680 }
 681
 682 static char *vfs_gluster_getwd(struct vfs_handle_struct *handle)
 683 {
 684         char *cwd;
 685         char *ret;
 686
 687         cwd = SMB_CALLOC_ARRAY(char, PATH_MAX);
 688         if (cwd == NULL) {
 689                 return NULL;
 690         }
 691
 692         ret = glfs_getcwd(handle->data, cwd, PATH_MAX - 1);
 693         if (ret == 0) {
 694                 free(cwd);
 695         }
 696         return ret;
 697 }
 698
 699 static int vfs_gluster_ntimes(struct vfs_handle_struct *handle,
 700                               const struct smb_filename *smb_fname,
 701                               struct smb_file_time *ft)
 702 {
 703         struct timespec times[2];
 704
 705         if (null_timespec(ft->atime)) {
 706                 times[0].tv_sec = smb_fname->st.st_ex_atime.tv_sec;
 707                 times[0].tv_nsec = smb_fname->st.st_ex_atime.tv_nsec;
 708         } else {
 709                 times[0].tv_sec = ft->atime.tv_sec;
 710                 times[0].tv_nsec = ft->atime.tv_nsec;
 711         }
 712
 713         if (null_timespec(ft->mtime)) {
 714                 times[1].tv_sec = smb_fname->st.st_ex_mtime.tv_sec;
 715                 times[1].tv_nsec = smb_fname->st.st_ex_mtime.tv_nsec;
 716         } else {
 717                 times[1].tv_sec = ft->mtime.tv_sec;
 718                 times[1].tv_nsec = ft->mtime.tv_nsec;
 719         }
 720
 721         if ((timespec_compare(&times[0],
 722                               &smb_fname->st.st_ex_atime) == 0) &&
 723             (timespec_compare(&times[1],
 724                               &smb_fname->st.st_ex_mtime) == 0)) {
 725                 return 0;
 726         }
 727
 728         return glfs_utimens(handle->data, smb_fname->base_name, times);
 729 }
 730
 731 static int vfs_gluster_ftruncate(struct vfs_handle_struct *handle,
 732                                  files_struct *fsp, off_t offset)
 733 {
 734         return glfs_ftruncate(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), offset);
 735 }
 736
 737 static int vfs_gluster_fallocate(struct vfs_handle_struct *handle,
 738                                  struct files_struct *fsp,
 739                                  enum vfs_fallocate_mode mode,
 740                                  off_t offset, off_t len)
 741 {
 742         errno = ENOTSUP;
 743         return -1;
 744 }
 745
 746 static char *vfs_gluster_realpath(struct vfs_handle_struct *handle,
 747                                   const char *path)
 748 {
 749         return glfs_realpath(handle->data, path, 0);
 750 }
 751
 752 static bool vfs_gluster_lock(struct vfs_handle_struct *handle,
 753                              files_struct *fsp, int op, off_t offset,
 754                              off_t count, int type)
 755 {
 756         struct flock flock = { 0, };
 757         int ret;
 758
 759         flock.l_type = type;
 760         flock.l_whence = SEEK_SET;
 761         flock.l_start = offset;
 762         flock.l_len = count;
 763         flock.l_pid = 0;
 764
 765         ret = glfs_posix_lock(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), op, &flock);
 766
 767         if (op == F_GETLK) {
 768                 /* lock query, true if someone else has locked */
 769                 if ((ret != -1) &&
 770                     (flock.l_type != F_UNLCK) &&
 771                     (flock.l_pid != 0) && (flock.l_pid != getpid()))
 772                         return true;
 773                 /* not me */
 774                 return false;
 775         }
 776
 777         if (ret == -1) {
 778                 return false;
 779         }
 780
 781         return true;
 782 }
 783
 784 static int vfs_gluster_kernel_flock(struct vfs_handle_struct *handle,
 785                                     files_struct *fsp, uint32 share_mode,
 786                                     uint32_t access_mask)
 787 {
 788         errno = ENOSYS;
 789         return -1;
 790 }
 791
 792 static int vfs_gluster_linux_setlease(struct vfs_handle_struct *handle,
 793                                       files_struct *fsp, int leasetype)
 794 {
 795         errno = ENOSYS;
 796         return -1;
 797 }
 798
 799 static bool vfs_gluster_getlock(struct vfs_handle_struct *handle,
 800                                 files_struct *fsp, off_t *poffset,
 801                                 off_t *pcount, int *ptype, pid_t *ppid)
 802 {
 803         struct flock flock = { 0, };
 804         int ret;
 805
 806         flock.l_type = *ptype;
 807         flock.l_whence = SEEK_SET;
 808         flock.l_start = *poffset;
 809         flock.l_len = *pcount;
 810         flock.l_pid = 0;
 811
 812         ret = glfs_posix_lock(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), F_GETLK, &flock);
 813
 814         if (ret == -1) {
 815                 return false;
 816         }
 817
 818         *ptype = flock.l_type;
 819         *poffset = flock.l_start;
 820         *pcount = flock.l_len;
 821         *ppid = flock.l_pid;
 822
 823         return true;
 824 }
 825
 826 static int vfs_gluster_symlink(struct vfs_handle_struct *handle,
 827                                const char *oldpath, const char *newpath)
 828 {
 829         return glfs_symlink(handle->data, oldpath, newpath);
 830 }
 831
 832 static int vfs_gluster_readlink(struct vfs_handle_struct *handle,
 833                                 const char *path, char *buf, size_t bufsiz)
 834 {
 835         return glfs_readlink(handle->data, path, buf, bufsiz);
 836 }
 837
 838 static int vfs_gluster_link(struct vfs_handle_struct *handle,
 839                             const char *oldpath, const char *newpath)
 840 {
 841         return glfs_link(handle->data, oldpath, newpath);
 842 }
 843
 844 static int vfs_gluster_mknod(struct vfs_handle_struct *handle, const char *path,
 845                              mode_t mode, SMB_DEV_T dev)
 846 {
 847         return glfs_mknod(handle->data, path, mode, dev);
 848 }
 849
 850 static NTSTATUS vfs_gluster_notify_watch(struct vfs_handle_struct *handle,
 851                                          struct sys_notify_context *ctx,
 852                                          const char *path, uint32_t *filter,
 853                                          uint32_t *subdir_filter,
 854                                          void (*callback) (struct sys_notify_context *ctx,
 855                                                            void *private_data,
 856                                                            struct notify_event *ev),
 857                                          void *private_data, void *handle_p)
 858 {
 859         return NT_STATUS_NOT_IMPLEMENTED;
 860 }
 861
 862 static int vfs_gluster_chflags(struct vfs_handle_struct *handle,
 863                                const char *path, unsigned int flags)
 864 {
 865         errno = ENOSYS;
 866         return -1;
 867 }
 868
 869 static int vfs_gluster_get_real_filename(struct vfs_handle_struct *handle,
 870                                          const char *path, const char *name,
 871                                          TALLOC_CTX *mem_ctx, char **found_name)
 872 {
 873         int ret;
 874         char key_buf[NAME_MAX + 64];
 875         char val_buf[NAME_MAX + 1];
 876
 877         if (strlen(name) >= NAME_MAX) {
 878                 errno = ENAMETOOLONG;
 879                 return -1;
 880         }
 881
 882         snprintf(key_buf, NAME_MAX + 64,
 883                  "user.glusterfs.get_real_filename:%s", name);
 884
 885         ret = glfs_getxattr(handle->data, path, key_buf, val_buf, NAME_MAX + 1);
 886         if (ret == -1) {
 887                 if (errno == ENODATA) {
 888                         errno = EOPNOTSUPP;
 889                 }
 890                 return -1;
 891         }
 892
 893         *found_name = talloc_strdup(mem_ctx, val_buf);
 894         if (found_name[0] == NULL) {
 895                 errno = ENOMEM;
 896                 return -1;
 897         }
 898         return 0;
 899 }
 900
 901 static const char *vfs_gluster_connectpath(struct vfs_handle_struct *handle,
 902                                            const char *filename)
 903 {
 904         return handle->conn->connectpath;
 905 }
 906
 907 /* EA Operations */
 908
 909 static ssize_t vfs_gluster_getxattr(struct vfs_handle_struct *handle,
 910                                     const char *path, const char *name,
 911                                     void *value, size_t size)
 912 {
 913         return glfs_getxattr(handle->data, path, name, value, size);
 914 }
 915
 916 static ssize_t vfs_gluster_fgetxattr(struct vfs_handle_struct *handle,
 917                                      files_struct *fsp, const char *name,
 918                                      void *value, size_t size)
 919 {
 920         return glfs_fgetxattr(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), name, value, size);
 921 }
 922
 923 static ssize_t vfs_gluster_listxattr(struct vfs_handle_struct *handle,
 924                                      const char *path, char *list, size_t size)
 925 {
 926         return glfs_listxattr(handle->data, path, list, size);
 927 }
 928
 929 static ssize_t vfs_gluster_flistxattr(struct vfs_handle_struct *handle,
 930                                       files_struct *fsp, char *list,
 931                                       size_t size)
 932 {
 933         return glfs_flistxattr(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), list, size);
 934 }
 935
 936 static int vfs_gluster_removexattr(struct vfs_handle_struct *handle,
 937                                    const char *path, const char *name)
 938 {
 939         return glfs_removexattr(handle->data, path, name);
 940 }
 941
 942 static int vfs_gluster_fremovexattr(struct vfs_handle_struct *handle,
 943                                     files_struct *fsp, const char *name)
 944 {
 945         return glfs_fremovexattr(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), name);
 946 }
 947
 948 static int vfs_gluster_setxattr(struct vfs_handle_struct *handle,
 949                                 const char *path, const char *name,
 950                                 const void *value, size_t size, int flags)
 951 {
 952         return glfs_setxattr(handle->data, path, name, value, size, flags);
 953 }
 954
 955 static int vfs_gluster_fsetxattr(struct vfs_handle_struct *handle,
 956                                  files_struct *fsp, const char *name,
 957                                  const void *value, size_t size, int flags)
 958 {
 959         return glfs_fsetxattr(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp), name, value, size,
 960                               flags);
 961 }
 962
 963 /* AIO Operations */
 964
 965 static bool vfs_gluster_aio_force(struct vfs_handle_struct *handle,
 966                                   files_struct *fsp)
 967 {
 968         return false;
 969 }
 970
 971 /* Offline Operations */
 972
 973 static bool vfs_gluster_is_offline(struct vfs_handle_struct *handle,
 974                                    const struct smb_filename *fname,
 975                                    SMB_STRUCT_STAT *sbuf)
 976 {
 977         return false;
 978 }
 979
 980 static int vfs_gluster_set_offline(struct vfs_handle_struct *handle,
 981                                    const struct smb_filename *fname)
 982 {
 983         errno = ENOTSUP;
 984         return -1;
 985 }
 986
 987 /*
 988   Gluster ACL Format:
 989
 990   Size = 4 (header) + N * 8 (entry)
 991
 992   Offset  Size    Field (Little Endian)
 993   -------------------------------------
 994   0-3     4-byte  Version
 995
 996   4-5     2-byte  Entry-1 tag
 997   6-7     2-byte  Entry-1 perm
 998   8-11    4-byte  Entry-1 id
 999
1000   12-13   2-byte  Entry-2 tag
1001   14-15   2-byte  Entry-2 perm
1002   16-19   4-byte  Entry-2 id
1003
1004   ...
1005
1006  */
1007
1008 /* header version */
1009 #define GLUSTER_ACL_VERSION 2
1010
1011 /* perm bits */
1012 #define GLUSTER_ACL_READ    0x04
1013 #define GLUSTER_ACL_WRITE   0x02
1014 #define GLUSTER_ACL_EXECUTE 0x01
1015
1016 /* tag values */
1017 #define GLUSTER_ACL_UNDEFINED_TAG  0x00
1018 #define GLUSTER_ACL_USER_OBJ       0x01
1019 #define GLUSTER_ACL_USER           0x02
1020 #define GLUSTER_ACL_GROUP_OBJ      0x04
1021 #define GLUSTER_ACL_GROUP          0x08
1022 #define GLUSTER_ACL_MASK           0x10
1023 #define GLUSTER_ACL_OTHER          0x20
1024
1025 #define GLUSTER_ACL_UNDEFINED_ID  (-1)
1026
1027 #define GLUSTER_ACL_HEADER_SIZE    4
1028 #define GLUSTER_ACL_ENTRY_SIZE     8
1029
1030 #define GLUSTER_ACL_SIZE(n)       (GLUSTER_ACL_HEADER_SIZE + (n * GLUSTER_ACL_ENTRY_SIZE))
1031
1032 static SMB_ACL_T mode_to_smb_acls(const struct stat *mode, TALLOC_CTX *mem_ctx)
1033 {
1034         struct smb_acl_t *result;
1035         int count;
1036
1037         count = 3;
1038         result = sys_acl_init(mem_ctx);
1039         if (!result) {
1040                 errno = ENOMEM;
1041                 return NULL;
1042         }
1043
1044         result->acl = talloc_array(result, struct smb_acl_entry, count);
1045         if (!result->acl) {
1046                 errno = ENOMEM;
1047                 talloc_free(result);
1048                 return NULL;
1049         }
1050
1051         result->count = count;
1052
1053         result->acl[0].a_type = SMB_ACL_USER_OBJ;
1054         result->acl[0].a_perm = (mode->st_mode & S_IRWXU) >> 6;;
1055
1056         result->acl[1].a_type = SMB_ACL_GROUP_OBJ;
1057         result->acl[1].a_perm = (mode->st_mode & S_IRWXG) >> 3;;
1058
1059         result->acl[2].a_type = SMB_ACL_OTHER;
1060         result->acl[2].a_perm = mode->st_mode & S_IRWXO;;
1061
1062         return result;
1063 }
1064
1065 static SMB_ACL_T gluster_to_smb_acl(const char *buf, size_t xattr_size,
1066                                     TALLOC_CTX *mem_ctx)
1067 {
1068         int count;
1069         size_t size;
1070         struct smb_acl_entry *smb_ace;
1071         struct smb_acl_t *result;
1072         int i;
1073         int offset;
1074         uint16_t tag;
1075         uint16_t perm;
1076         uint32_t id;
1077
1078         size = xattr_size;
1079
1080         if (size < GLUSTER_ACL_HEADER_SIZE) {
1081                 /* ACL should be at least as big as the header (4 bytes) */
1082                 errno = EINVAL;
1083                 return NULL;
1084         }
1085
1086         size -= GLUSTER_ACL_HEADER_SIZE; /* size of header = 4 bytes */
1087
1088         if (size % GLUSTER_ACL_ENTRY_SIZE) {
1089                 /* Size of entries must strictly be a multiple of
1090                    size of an ACE (8 bytes)
1091                 */
1092                 errno = EINVAL;
1093                 return NULL;
1094         }
1095
1096         count = size / GLUSTER_ACL_ENTRY_SIZE;
1097
1098         /* Version is the first 4 bytes of the ACL */
1099         if (IVAL(buf, 0) != GLUSTER_ACL_VERSION) {
1100                 DEBUG(0, ("Unknown gluster ACL version: %d\n",
1101                           IVAL(buf, 0)));
1102                 return NULL;
1103         }
1104         offset = GLUSTER_ACL_HEADER_SIZE;
1105
1106         result = sys_acl_init(mem_ctx);
1107         if (!result) {
1108                 errno = ENOMEM;
1109                 return NULL;
1110         }
1111
1112         result->acl = talloc_array(result, struct smb_acl_entry, count);
1113         if (!result->acl) {
1114                 errno = ENOMEM;
1115                 talloc_free(result);
1116                 return NULL;
1117         }
1118
1119         result->count = count;
1120
1121         smb_ace = result->acl;
1122
1123         for (i = 0; i < count; i++) {
1124                 /* TAG is the first 2 bytes of an entry */
1125                 tag = SVAL(buf, offset);
1126                 offset += 2;
1127
1128                 /* PERM is the next 2 bytes of an entry */
1129                 perm = SVAL(buf, offset);
1130                 offset += 2;
1131
1132                 /* ID is the last 4 bytes of an entry */
1133                 id = IVAL(buf, offset);
1134                 offset += 4;
1135
1136                 switch(tag) {
1137                 case GLUSTER_ACL_USER:
1138                         smb_ace->a_type = SMB_ACL_USER;
1139                         break;
1140                 case GLUSTER_ACL_USER_OBJ:
1141                         smb_ace->a_type = SMB_ACL_USER_OBJ;
1142                         break;
1143                 case GLUSTER_ACL_GROUP:
1144                         smb_ace->a_type = SMB_ACL_GROUP;
1145                         break;
1146                 case GLUSTER_ACL_GROUP_OBJ:
1147                         smb_ace->a_type = SMB_ACL_GROUP_OBJ;
1148                         break;
1149                 case GLUSTER_ACL_OTHER:
1150                         smb_ace->a_type = SMB_ACL_OTHER;
1151                         break;
1152                 case GLUSTER_ACL_MASK:
1153                         smb_ace->a_type = SMB_ACL_MASK;
1154                         break;
1155                 default:
1156                         DEBUG(0, ("unknown tag type %d\n", (unsigned int) tag));
1157                         return NULL;
1158                 }
1159
1160
1161                 switch(smb_ace->a_type) {
1162                 case SMB_ACL_USER:
1163                         smb_ace->info.user.uid = id;
1164                         break;
1165                 case SMB_ACL_GROUP:
1166                         smb_ace->info.group.gid = id;
1167                         break;
1168                 default:
1169                         break;
1170                 }
1171
1172                 smb_ace->a_perm = 0;
1173                 smb_ace->a_perm |=
1174                         ((perm & GLUSTER_ACL_READ) ? SMB_ACL_READ : 0);
1175                 smb_ace->a_perm |=
1176                         ((perm & GLUSTER_ACL_WRITE) ? SMB_ACL_WRITE : 0);
1177                 smb_ace->a_perm |=
1178                         ((perm & GLUSTER_ACL_EXECUTE) ? SMB_ACL_EXECUTE : 0);
1179
1180                 smb_ace++;
1181         }
1182
1183         return result;
1184 }
1185
1186
1187 static int gluster_ace_cmp(const void *left, const void *right)
1188 {
1189         int ret = 0;
1190         uint16_t tag_left, tag_right;
1191         uint32_t id_left, id_right;
1192
1193         /*
1194           Sorting precedence:
1195
1196            - Smaller TAG values must be earlier.
1197
1198            - Within same TAG, smaller identifiers must be earlier, E.g:
1199              UID 0 entry must be earlier than UID 200
1200              GID 17 entry must be earlier than GID 19
1201         */
1202
1203         /* TAG is the first element in the entry */
1204         tag_left = SVAL(left, 0);
1205         tag_right = SVAL(right, 0);
1206
1207         ret = (tag_left - tag_right);
1208         if (!ret) {
1209                 /* ID is the third element in the entry, after two short
1210                    integers (tag and perm), i.e at offset 4.
1211                 */
1212                 id_left = IVAL(left, 4);
1213                 id_right = IVAL(right, 4);
1214                 ret = id_left - id_right;
1215         }
1216
1217         return ret;
1218 }
1219
1220
1221 static ssize_t smb_to_gluster_acl(SMB_ACL_T theacl, char *buf, size_t len)
1222 {
1223         ssize_t size;
1224         struct smb_acl_entry *smb_ace;
1225         int i;
1226         int count;
1227         uint16_t tag;
1228         uint16_t perm;
1229         uint32_t id;
1230         int offset;
1231
1232         count = theacl->count;
1233
1234         size = GLUSTER_ACL_HEADER_SIZE + (count * GLUSTER_ACL_ENTRY_SIZE);
1235         if (!buf) {
1236                 return size;
1237         }
1238
1239         if (len < size) {
1240                 errno = ERANGE;
1241                 return -1;
1242         }
1243
1244         smb_ace = theacl->acl;
1245
1246         /* Version is the first 4 bytes of the ACL */
1247         SIVAL(buf, 0, GLUSTER_ACL_VERSION);
1248         offset = GLUSTER_ACL_HEADER_SIZE;
1249
1250         for (i = 0; i < count; i++) {
1251                 /* Calculate tag */
1252                 switch(smb_ace->a_type) {
1253                 case SMB_ACL_USER:
1254                         tag = GLUSTER_ACL_USER;
1255                         break;
1256                 case SMB_ACL_USER_OBJ:
1257                         tag = GLUSTER_ACL_USER_OBJ;
1258                         break;
1259                 case SMB_ACL_GROUP:
1260                         tag = GLUSTER_ACL_GROUP;
1261                         break;
1262                 case SMB_ACL_GROUP_OBJ:
1263                         tag = GLUSTER_ACL_GROUP_OBJ;
1264                         break;
1265                 case SMB_ACL_OTHER:
1266                         tag = GLUSTER_ACL_OTHER;
1267                         break;
1268                 case SMB_ACL_MASK:
1269                         tag = GLUSTER_ACL_MASK;
1270                         break;
1271                 default:
1272                         DEBUG(0, ("Unknown tag value %d\n",
1273                                   smb_ace->a_type));
1274                         errno = EINVAL;
1275                         return -1;
1276                 }
1277
1278
1279                 /* Calculate id */
1280                 switch(smb_ace->a_type) {
1281                 case SMB_ACL_USER:
1282                         id = smb_ace->info.user.uid;
1283                         break;
1284                 case SMB_ACL_GROUP:
1285                         id = smb_ace->info.group.gid;
1286                         break;
1287                 default:
1288                         id = GLUSTER_ACL_UNDEFINED_ID;
1289                         break;
1290                 }
1291
1292                 /* Calculate perm */
1293                 perm = 0;
1294
1295                 perm |=
1296                         ((smb_ace->a_perm & SMB_ACL_READ) ? GLUSTER_ACL_READ : 0);
1297                 perm |=
1298                         ((smb_ace->a_perm & SMB_ACL_WRITE) ? GLUSTER_ACL_WRITE : 0);
1299                 perm |=
1300                         ((smb_ace->a_perm & SMB_ACL_EXECUTE) ? GLUSTER_ACL_EXECUTE : 0);
1301
1302
1303                 /* TAG is the first 2 bytes of an entry */
1304                 SSVAL(buf, offset, tag);
1305                 offset += 2;
1306
1307                 /* PERM is the next 2 bytes of an entry */
1308                 SSVAL(buf, offset, perm);
1309                 offset += 2;
1310
1311                 /* ID is the last 4 bytes of an entry */
1312                 SIVAL(buf, offset, id);
1313                 offset += 4;
1314
1315                 smb_ace++;
1316         }
1317
1318         /* Skip the header, sort @count number of 8-byte entries */
1319         qsort(buf+GLUSTER_ACL_HEADER_SIZE, count, GLUSTER_ACL_ENTRY_SIZE,
1320               gluster_ace_cmp);
1321
1322         return size;
1323 }
1324
1325
1326 static SMB_ACL_T vfs_gluster_sys_acl_get_file(struct vfs_handle_struct *handle,
1327                                               const char *path_p,
1328                                               SMB_ACL_TYPE_T type,
1329                                               TALLOC_CTX *mem_ctx)
1330 {
1331         struct smb_acl_t *result;
1332         struct stat st;
1333         char *buf;
1334         const char *key;
1335         ssize_t ret, size = GLUSTER_ACL_SIZE(20);
1336
1337         switch (type) {
1338         case SMB_ACL_TYPE_ACCESS:
1339                 key = "system.posix_acl_access";
1340                 break;
1341         case SMB_ACL_TYPE_DEFAULT:
1342                 key = "system.posix_acl_default";
1343                 break;
1344         default:
1345                 errno = EINVAL;
1346                 return NULL;
1347         }
1348
1349         buf = alloca(size);
1350         if (!buf) {
1351                 return NULL;
1352         }
1353
1354         ret = glfs_getxattr(handle->data, path_p, key, buf, size);
1355         if (ret == -1 && errno == ERANGE) {
1356                 ret = glfs_getxattr(handle->data, path_p, key, 0, 0);
1357                 if (ret > 0) {
1358                         buf = alloca(ret);
1359                         if (!buf) {
1360                                 return NULL;
1361                         }
1362                         ret = glfs_getxattr(handle->data, path_p, key, buf, ret);
1363                 }
1364         }
1365
1366         /* retrieving the ACL from the xattr has finally failed, do a
1367          * mode-to-acl mapping */
1368
1369         if (ret == -1 && errno == ENODATA) {
1370                 ret = glfs_stat(handle->data, path_p, &st);
1371                 if (ret == 0) {
1372                         result = mode_to_smb_acls(&st, mem_ctx);
1373                         return result;
1374                 }
1375         }
1376
1377         if (ret <= 0) {
1378                 return NULL;
1379         }
1380
1381         result = gluster_to_smb_acl(buf, ret, mem_ctx);
1382
1383         return result;
1384 }
1385
1386 static SMB_ACL_T vfs_gluster_sys_acl_get_fd(struct vfs_handle_struct *handle,
1387                                             struct files_struct *fsp,
1388                                             TALLOC_CTX *mem_ctx)
1389 {
1390         struct smb_acl_t *result;
1391         struct stat st;
1392         ssize_t ret, size = GLUSTER_ACL_SIZE(20);
1393         char *buf;
1394         glfs_fd_t *glfd;
1395
1396         glfd = *(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp);
1397
1398         buf = alloca(size);
1399         if (!buf) {
1400                 return NULL;
1401         }
1402
1403         ret = glfs_fgetxattr(glfd, "system.posix_acl_access", buf, size);
1404         if (ret == -1 && errno == ERANGE) {
1405                 ret = glfs_fgetxattr(glfd, "system.posix_acl_access", 0, 0);
1406                 if (ret > 0) {
1407                         buf = alloca(ret);
1408                         if (!buf) {
1409                                 return NULL;
1410                         }
1411                         ret = glfs_fgetxattr(glfd, "system.posix_acl_access",
1412                                              buf, ret);
1413                 }
1414         }
1415
1416         /* retrieving the ACL from the xattr has finally failed, do a
1417          * mode-to-acl mapping */
1418
1419         if (ret == -1 && errno == ENODATA) {
1420                 ret = glfs_fstat(glfd, &st);
1421                 if (ret == 0) {
1422                         result = mode_to_smb_acls(&st, mem_ctx);
1423                         return result;
1424                 }
1425         }
1426
1427         if (ret <= 0) {
1428                 return NULL;
1429         }
1430
1431         result = gluster_to_smb_acl(buf, ret, mem_ctx);
1432
1433         return result;
1434 }
1435
1436 static int vfs_gluster_sys_acl_set_file(struct vfs_handle_struct *handle,
1437                                         const char *name,
1438                                         SMB_ACL_TYPE_T acltype,
1439                                         SMB_ACL_T theacl)
1440 {
1441         int ret;
1442         const char *key;
1443         char *buf;
1444         ssize_t size;
1445
1446         switch (acltype) {
1447         case SMB_ACL_TYPE_ACCESS:
1448                 key = "system.posix_acl_access";
1449                 break;
1450         case SMB_ACL_TYPE_DEFAULT:
1451                 key = "system.posix_acl_default";
1452                 break;
1453         default:
1454                 errno = EINVAL;
1455                 return -1;
1456         }
1457
1458         size = smb_to_gluster_acl(theacl, 0, 0);
1459         buf = alloca(size);
1460
1461         size = smb_to_gluster_acl(theacl, buf, size);
1462         if (size == -1) {
1463                 return -1;
1464         }
1465
1466         ret = glfs_setxattr(handle->data, name, key, buf, size, 0);
1467
1468         return ret;
1469 }
1470
1471 static int vfs_gluster_sys_acl_set_fd(struct vfs_handle_struct *handle,
1472                                       struct files_struct *fsp,
1473                                       SMB_ACL_T theacl)
1474 {
1475         int ret;
1476         char *buf;
1477         ssize_t size;
1478
1479         size = smb_to_gluster_acl(theacl, 0, 0);
1480         buf = alloca(size);
1481
1482         size = smb_to_gluster_acl(theacl, buf, size);
1483         if (size == -1) {
1484                 return -1;
1485         }
1486
1487         ret = glfs_fsetxattr(*(glfs_fd_t **)VFS_FETCH_FSP_EXTENSION(handle, fsp),
1488                              "system.posix_acl_access", buf, size, 0);
1489         return ret;
1490 }
1491
1492 static int vfs_gluster_sys_acl_delete_def_file(struct vfs_handle_struct *handle,
1493                                                const char *path)
1494 {
1495         return glfs_removexattr(handle->data, path, "system.posix_acl_default");
1496 }
1497
1498 static struct vfs_fn_pointers glusterfs_fns = {
1499
1500         /* Disk Operations */
1501
1502         .connect_fn = vfs_gluster_connect,
1503         .disconnect_fn = vfs_gluster_disconnect,
1504         .disk_free_fn = vfs_gluster_disk_free,
1505         .get_quota_fn = vfs_gluster_get_quota,
1506         .set_quota_fn = vfs_gluster_set_quota,
1507         .statvfs_fn = vfs_gluster_statvfs,
1508         .fs_capabilities_fn = vfs_gluster_fs_capabilities,
1509
1510         .get_dfs_referrals_fn = NULL,
1511
1512         /* Directory Operations */
1513
1514         .opendir_fn = vfs_gluster_opendir,
1515         .fdopendir_fn = vfs_gluster_fdopendir,
1516         .readdir_fn = vfs_gluster_readdir,
1517         .seekdir_fn = vfs_gluster_seekdir,
1518         .telldir_fn = vfs_gluster_telldir,
1519         .rewind_dir_fn = vfs_gluster_rewinddir,
1520         .mkdir_fn = vfs_gluster_mkdir,
1521         .rmdir_fn = vfs_gluster_rmdir,
1522         .closedir_fn = vfs_gluster_closedir,
1523         .init_search_op_fn = vfs_gluster_init_search_op,
1524
1525         /* File Operations */
1526
1527         .open_fn = vfs_gluster_open,
1528         .create_file_fn = NULL,
1529         .close_fn = vfs_gluster_close,
1530         .read_fn = vfs_gluster_read,
1531         .pread_fn = vfs_gluster_pread,
1532         .pread_send_fn = vfs_gluster_pread_send,
1533         .pread_recv_fn = vfs_gluster_pread_recv,
1534         .write_fn = vfs_gluster_write,
1535         .pwrite_fn = vfs_gluster_pwrite,
1536         .pwrite_send_fn = vfs_gluster_pwrite_send,
1537         .pwrite_recv_fn = vfs_gluster_pwrite_recv,
1538         .lseek_fn = vfs_gluster_lseek,
1539         .sendfile_fn = vfs_gluster_sendfile,
1540         .recvfile_fn = vfs_gluster_recvfile,
1541         .rename_fn = vfs_gluster_rename,
1542         .fsync_fn = vfs_gluster_fsync,
1543         .fsync_send_fn = vfs_gluster_fsync_send,
1544         .fsync_recv_fn = vfs_gluster_fsync_recv,
1545
1546         .stat_fn = vfs_gluster_stat,
1547         .fstat_fn = vfs_gluster_fstat,
1548         .lstat_fn = vfs_gluster_lstat,
1549         .get_alloc_size_fn = vfs_gluster_get_alloc_size,
1550         .unlink_fn = vfs_gluster_unlink,
1551
1552         .chmod_fn = vfs_gluster_chmod,
1553         .fchmod_fn = vfs_gluster_fchmod,
1554         .chown_fn = vfs_gluster_chown,
1555         .fchown_fn = vfs_gluster_fchown,
1556         .lchown_fn = vfs_gluster_lchown,
1557         .chdir_fn = vfs_gluster_chdir,
1558         .getwd_fn = vfs_gluster_getwd,
1559         .ntimes_fn = vfs_gluster_ntimes,
1560         .ftruncate_fn = vfs_gluster_ftruncate,
1561         .fallocate_fn = vfs_gluster_fallocate,
1562         .lock_fn = vfs_gluster_lock,
1563         .kernel_flock_fn = vfs_gluster_kernel_flock,
1564         .linux_setlease_fn = vfs_gluster_linux_setlease,
1565         .getlock_fn = vfs_gluster_getlock,
1566         .symlink_fn = vfs_gluster_symlink,
1567         .readlink_fn = vfs_gluster_readlink,
1568         .link_fn = vfs_gluster_link,
1569         .mknod_fn = vfs_gluster_mknod,
1570         .realpath_fn = vfs_gluster_realpath,
1571         .notify_watch_fn = vfs_gluster_notify_watch,
1572         .chflags_fn = vfs_gluster_chflags,
1573         .file_id_create_fn = NULL,
1574         .copy_chunk_send_fn = NULL,
1575         .copy_chunk_recv_fn = NULL,
1576         .streaminfo_fn = NULL,
1577         .get_real_filename_fn = vfs_gluster_get_real_filename,
1578         .connectpath_fn = vfs_gluster_connectpath,
1579
1580         .brl_lock_windows_fn = NULL,
1581         .brl_unlock_windows_fn = NULL,
1582         .brl_cancel_windows_fn = NULL,
1583         .strict_lock_fn = NULL,
1584         .strict_unlock_fn = NULL,
1585         .translate_name_fn = NULL,
1586         .fsctl_fn = NULL,
1587
1588         /* NT ACL Operations */
1589         .fget_nt_acl_fn = NULL,
1590         .get_nt_acl_fn = NULL,
1591         .fset_nt_acl_fn = NULL,
1592         .audit_file_fn = NULL,
1593
1594         /* Posix ACL Operations */
1595         .chmod_acl_fn = NULL,   /* passthrough to default */
1596         .fchmod_acl_fn = NULL,  /* passthrough to default */
1597         .sys_acl_get_file_fn = vfs_gluster_sys_acl_get_file,
1598         .sys_acl_get_fd_fn = vfs_gluster_sys_acl_get_fd,
1599         .sys_acl_blob_get_file_fn = posix_sys_acl_blob_get_file,
1600         .sys_acl_blob_get_fd_fn = posix_sys_acl_blob_get_fd,
1601         .sys_acl_set_file_fn = vfs_gluster_sys_acl_set_file,
1602         .sys_acl_set_fd_fn = vfs_gluster_sys_acl_set_fd,
1603         .sys_acl_delete_def_file_fn = vfs_gluster_sys_acl_delete_def_file,
1604
1605         /* EA Operations */
1606         .getxattr_fn = vfs_gluster_getxattr,
1607         .fgetxattr_fn = vfs_gluster_fgetxattr,
1608         .listxattr_fn = vfs_gluster_listxattr,
1609         .flistxattr_fn = vfs_gluster_flistxattr,
1610         .removexattr_fn = vfs_gluster_removexattr,
1611         .fremovexattr_fn = vfs_gluster_fremovexattr,
1612         .setxattr_fn = vfs_gluster_setxattr,
1613         .fsetxattr_fn = vfs_gluster_fsetxattr,
1614
1615         /* AIO Operations */
1616         .aio_force_fn = vfs_gluster_aio_force,
1617
1618         /* Offline Operations */
1619         .is_offline_fn = vfs_gluster_is_offline,
1620         .set_offline_fn = vfs_gluster_set_offline,
1621
1622         /* Durable handle Operations */
1623         .durable_cookie_fn = NULL,
1624         .durable_disconnect_fn = NULL,
1625         .durable_reconnect_fn = NULL,
1626 };
1627
1628 NTSTATUS vfs_glusterfs_init(void);
1629 NTSTATUS vfs_glusterfs_init(void)
1630 {
1631         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
1632                                 "glusterfs", &glusterfs_fns);
1633 }