source3/modules/vfs_default.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Wrap disk only vfs functions to sidestep dodgy compilers.
   4    Copyright (C) Tim Potter 1998
   5    Copyright (C) Jeremy Allison 2007
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "system/time.h"
  23 #include "system/filesys.h"
  24 #include "smbd/smbd.h"
  25 #include "smbd/globals.h"
  26 #include "ntioctl.h"
  27 #include "smbprofile.h"
  28 #include "../libcli/security/security.h"
  29 #include "passdb/lookup_sid.h"
  30 #include "source3/include/msdfs.h"
  31 #include "librpc/gen_ndr/ndr_dfsblobs.h"
  32 #include "lib/util/tevent_unix.h"
  33 #include "lib/asys/asys.h"
  34 #include "lib/util/tevent_ntstatus.h"
  35
  36 #undef DBGC_CLASS
  37 #define DBGC_CLASS DBGC_VFS
  38
  39 /* Check for NULL pointer parameters in vfswrap_* functions */
  40
  41 /* We don't want to have NULL function pointers lying around.  Someone
  42    is sure to try and execute them.  These stubs are used to prevent
  43    this possibility. */
  44
  45 static int vfswrap_connect(vfs_handle_struct *handle, const char *service, const char *user)
  46 {
  47     return 0;    /* Return >= 0 for success */
  48 }
  49
  50 static void vfswrap_disconnect(vfs_handle_struct *handle)
  51 {
  52 }
  53
  54 /* Disk operations */
  55
  56 static uint64_t vfswrap_disk_free(vfs_handle_struct *handle, const char *path, bool small_query, uint64_t *bsize,
  57                                uint64_t *dfree, uint64_t *dsize)
  58 {
  59         uint64_t result;
  60
  61         result = sys_disk_free(handle->conn, path, small_query, bsize, dfree, dsize);
  62         return result;
  63 }
  64
  65 static int vfswrap_get_quota(struct vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt)
  66 {
  67 #ifdef HAVE_SYS_QUOTAS
  68         int result;
  69
  70         START_PROFILE(syscall_get_quota);
  71         result = sys_get_quota(handle->conn->connectpath, qtype, id, qt);
  72         END_PROFILE(syscall_get_quota);
  73         return result;
  74 #else
  75         errno = ENOSYS;
  76         return -1;
  77 #endif
  78 }
  79
  80 static int vfswrap_set_quota(struct vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt)
  81 {
  82 #ifdef HAVE_SYS_QUOTAS
  83         int result;
  84
  85         START_PROFILE(syscall_set_quota);
  86         result = sys_set_quota(handle->conn->connectpath, qtype, id, qt);
  87         END_PROFILE(syscall_set_quota);
  88         return result;
  89 #else
  90         errno = ENOSYS;
  91         return -1;
  92 #endif
  93 }
  94
  95 static int vfswrap_get_shadow_copy_data(struct vfs_handle_struct *handle,
  96                                         struct files_struct *fsp,
  97                                         struct shadow_copy_data *shadow_copy_data,
  98                                         bool labels)
  99 {
 100         errno = ENOSYS;
 101         return -1;  /* Not implemented. */
 102 }
 103
 104 static int vfswrap_statvfs(struct vfs_handle_struct *handle, const char *path, vfs_statvfs_struct *statbuf)
 105 {
 106         return sys_statvfs(path, statbuf);
 107 }
 108
 109 static uint32_t vfswrap_fs_capabilities(struct vfs_handle_struct *handle,
 110                 enum timestamp_set_resolution *p_ts_res)
 111 {
 112         connection_struct *conn = handle->conn;
 113         uint32_t caps = FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
 114         struct smb_filename *smb_fname_cpath = NULL;
 115         struct vfs_statvfs_struct statbuf;
 116         int ret;
 117
 118         ZERO_STRUCT(statbuf);
 119         ret = sys_statvfs(conn->connectpath, &statbuf);
 120         if (ret == 0) {
 121                 caps = statbuf.FsCapabilities;
 122         }
 123
 124         *p_ts_res = TIMESTAMP_SET_SECONDS;
 125
 126         /* Work out what timestamp resolution we can
 127          * use when setting a timestamp. */
 128
 129         smb_fname_cpath = synthetic_smb_fname(talloc_tos(), conn->connectpath,
 130                                               NULL, NULL);
 131         if (smb_fname_cpath == NULL) {
 132                 return caps;
 133         }
 134
 135         ret = SMB_VFS_STAT(conn, smb_fname_cpath);
 136         if (ret == -1) {
 137                 TALLOC_FREE(smb_fname_cpath);
 138                 return caps;
 139         }
 140
 141         if (smb_fname_cpath->st.st_ex_mtime.tv_nsec ||
 142                         smb_fname_cpath->st.st_ex_atime.tv_nsec ||
 143                         smb_fname_cpath->st.st_ex_ctime.tv_nsec) {
 144                 /* If any of the normal UNIX directory timestamps
 145                  * have a non-zero tv_nsec component assume
 146                  * we might be able to set sub-second timestamps.
 147                  * See what filetime set primitives we have.
 148                  */
 149 #if defined(HAVE_UTIMENSAT)
 150                 *p_ts_res = TIMESTAMP_SET_NT_OR_BETTER;
 151 #elif defined(HAVE_UTIMES)
 152                 /* utimes allows msec timestamps to be set. */
 153                 *p_ts_res = TIMESTAMP_SET_MSEC;
 154 #elif defined(HAVE_UTIME)
 155                 /* utime only allows sec timestamps to be set. */
 156                 *p_ts_res = TIMESTAMP_SET_SECONDS;
 157 #endif
 158
 159                 DEBUG(10,("vfswrap_fs_capabilities: timestamp "
 160                         "resolution of %s "
 161                         "available on share %s, directory %s\n",
 162                         *p_ts_res == TIMESTAMP_SET_MSEC ? "msec" : "sec",
 163                         lp_servicename(talloc_tos(), conn->params->service),
 164                         conn->connectpath ));
 165         }
 166         TALLOC_FREE(smb_fname_cpath);
 167         return caps;
 168 }
 169
 170 static NTSTATUS vfswrap_get_dfs_referrals(struct vfs_handle_struct *handle,
 171                                           struct dfs_GetDFSReferral *r)
 172 {
 173         struct junction_map *junction = NULL;
 174         int consumedcnt = 0;
 175         bool self_referral = false;
 176         char *pathnamep = NULL;
 177         char *local_dfs_path = NULL;
 178         NTSTATUS status;
 179         int i;
 180         uint16_t max_referral_level = r->in.req.max_referral_level;
 181
 182         if (DEBUGLVL(10)) {
 183                 NDR_PRINT_IN_DEBUG(dfs_GetDFSReferral, r);
 184         }
 185
 186         /* get the junction entry */
 187         if (r->in.req.servername == NULL) {
 188                 return NT_STATUS_NOT_FOUND;
 189         }
 190
 191         /*
 192          * Trim pathname sent by client so it begins with only one backslash.
 193          * Two backslashes confuse some dfs clients
 194          */
 195
 196         local_dfs_path = talloc_strdup(r, r->in.req.servername);
 197         if (local_dfs_path == NULL) {
 198                 return NT_STATUS_NO_MEMORY;
 199         }
 200         pathnamep = local_dfs_path;
 201         while (IS_DIRECTORY_SEP(pathnamep[0]) &&
 202                IS_DIRECTORY_SEP(pathnamep[1])) {
 203                 pathnamep++;
 204         }
 205
 206         junction = talloc_zero(r, struct junction_map);
 207         if (junction == NULL) {
 208                 return NT_STATUS_NO_MEMORY;
 209         }
 210
 211         /* The following call can change cwd. */
 212         status = get_referred_path(r, pathnamep,
 213                                    !handle->conn->sconn->using_smb2,
 214                                    junction, &consumedcnt, &self_referral);
 215         if (!NT_STATUS_IS_OK(status)) {
 216                 vfs_ChDir(handle->conn, handle->conn->connectpath);
 217                 return status;
 218         }
 219         vfs_ChDir(handle->conn, handle->conn->connectpath);
 220
 221         if (!self_referral) {
 222                 pathnamep[consumedcnt] = '\0';
 223
 224                 if (DEBUGLVL(3)) {
 225                         dbgtext("setup_dfs_referral: Path %s to "
 226                                 "alternate path(s):",
 227                                 pathnamep);
 228                         for (i=0; i < junction->referral_count; i++) {
 229                                 dbgtext(" %s",
 230                                 junction->referral_list[i].alternate_path);
 231                         }
 232                         dbgtext(".\n");
 233                 }
 234         }
 235
 236         if (r->in.req.max_referral_level <= 2) {
 237                 max_referral_level = 2;
 238         }
 239         if (r->in.req.max_referral_level >= 3) {
 240                 max_referral_level = 3;
 241         }
 242
 243         r->out.resp = talloc_zero(r, struct dfs_referral_resp);
 244         if (r->out.resp == NULL) {
 245                 return NT_STATUS_NO_MEMORY;
 246         }
 247
 248         r->out.resp->path_consumed = strlen_m(pathnamep) * 2;
 249         r->out.resp->nb_referrals = junction->referral_count;
 250
 251         r->out.resp->header_flags = DFS_HEADER_FLAG_STORAGE_SVR;
 252         if (self_referral) {
 253                 r->out.resp->header_flags |= DFS_HEADER_FLAG_REFERAL_SVR;
 254         }
 255
 256         r->out.resp->referral_entries = talloc_zero_array(r,
 257                                 struct dfs_referral_type,
 258                                 r->out.resp->nb_referrals);
 259         if (r->out.resp->referral_entries == NULL) {
 260                 return NT_STATUS_NO_MEMORY;
 261         }
 262
 263         switch (max_referral_level) {
 264         case 2:
 265                 for(i=0; i < junction->referral_count; i++) {
 266                         struct referral *ref = &junction->referral_list[i];
 267                         TALLOC_CTX *mem_ctx = r->out.resp->referral_entries;
 268                         struct dfs_referral_type *t =
 269                                 &r->out.resp->referral_entries[i];
 270                         struct dfs_referral_v2 *v2 = &t->referral.v2;
 271
 272                         t->version = 2;
 273                         v2->size = VERSION2_REFERRAL_SIZE;
 274                         if (self_referral) {
 275                                 v2->server_type = DFS_SERVER_ROOT;
 276                         } else {
 277                                 v2->server_type = DFS_SERVER_NON_ROOT;
 278                         }
 279                         v2->entry_flags = 0;
 280                         v2->proximity = ref->proximity;
 281                         v2->ttl = ref->ttl;
 282                         v2->DFS_path = talloc_strdup(mem_ctx, pathnamep);
 283                         if (v2->DFS_path == NULL) {
 284                                 return NT_STATUS_NO_MEMORY;
 285                         }
 286                         v2->DFS_alt_path = talloc_strdup(mem_ctx, pathnamep);
 287                         if (v2->DFS_alt_path == NULL) {
 288                                 return NT_STATUS_NO_MEMORY;
 289                         }
 290                         v2->netw_address = talloc_strdup(mem_ctx,
 291                                                          ref->alternate_path);
 292                         if (v2->netw_address == NULL) {
 293                                 return NT_STATUS_NO_MEMORY;
 294                         }
 295                 }
 296
 297                 break;
 298         case 3:
 299                 for(i=0; i < junction->referral_count; i++) {
 300                         struct referral *ref = &junction->referral_list[i];
 301                         TALLOC_CTX *mem_ctx = r->out.resp->referral_entries;
 302                         struct dfs_referral_type *t =
 303                                 &r->out.resp->referral_entries[i];
 304                         struct dfs_referral_v3 *v3 = &t->referral.v3;
 305                         struct dfs_normal_referral *r1 = &v3->referrals.r1;
 306
 307                         t->version = 3;
 308                         v3->size = VERSION3_REFERRAL_SIZE;
 309                         if (self_referral) {
 310                                 v3->server_type = DFS_SERVER_ROOT;
 311                         } else {
 312                                 v3->server_type = DFS_SERVER_NON_ROOT;
 313                         }
 314                         v3->entry_flags = 0;
 315                         v3->ttl = ref->ttl;
 316                         r1->DFS_path = talloc_strdup(mem_ctx, pathnamep);
 317                         if (r1->DFS_path == NULL) {
 318                                 return NT_STATUS_NO_MEMORY;
 319                         }
 320                         r1->DFS_alt_path = talloc_strdup(mem_ctx, pathnamep);
 321                         if (r1->DFS_alt_path == NULL) {
 322                                 return NT_STATUS_NO_MEMORY;
 323                         }
 324                         r1->netw_address = talloc_strdup(mem_ctx,
 325                                                          ref->alternate_path);
 326                         if (r1->netw_address == NULL) {
 327                                 return NT_STATUS_NO_MEMORY;
 328                         }
 329                 }
 330                 break;
 331         default:
 332                 DEBUG(0,("setup_dfs_referral: Invalid dfs referral "
 333                         "version: %d\n",
 334                         max_referral_level));
 335                 return NT_STATUS_INVALID_LEVEL;
 336         }
 337
 338         if (DEBUGLVL(10)) {
 339                 NDR_PRINT_OUT_DEBUG(dfs_GetDFSReferral, r);
 340         }
 341
 342         return NT_STATUS_OK;
 343 }
 344
 345 /* Directory operations */
 346
 347 static DIR *vfswrap_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
 348 {
 349         DIR *result;
 350
 351         START_PROFILE(syscall_opendir);
 352         result = opendir(fname);
 353         END_PROFILE(syscall_opendir);
 354         return result;
 355 }
 356
 357 static DIR *vfswrap_fdopendir(vfs_handle_struct *handle,
 358                         files_struct *fsp,
 359                         const char *mask,
 360                         uint32 attr)
 361 {
 362         DIR *result;
 363
 364         START_PROFILE(syscall_fdopendir);
 365         result = sys_fdopendir(fsp->fh->fd);
 366         END_PROFILE(syscall_fdopendir);
 367         return result;
 368 }
 369
 370
 371 static struct dirent *vfswrap_readdir(vfs_handle_struct *handle,
 372                                           DIR *dirp,
 373                                           SMB_STRUCT_STAT *sbuf)
 374 {
 375         struct dirent *result;
 376
 377         START_PROFILE(syscall_readdir);
 378         result = readdir(dirp);
 379         END_PROFILE(syscall_readdir);
 380         if (sbuf) {
 381                 /* Default Posix readdir() does not give us stat info.
 382                  * Set to invalid to indicate we didn't return this info. */
 383                 SET_STAT_INVALID(*sbuf);
 384 #if defined(HAVE_DIRFD) && defined(HAVE_FSTATAT)
 385                 if (result != NULL) {
 386                         /* See if we can efficiently return this. */
 387                         struct stat st;
 388                         int flags = (lp_posix_pathnames() ?
 389                                 AT_SYMLINK_NOFOLLOW : 0);
 390                         int ret = fstatat(dirfd(dirp),
 391                                         result->d_name,
 392                                         &st,
 393                                         flags);
 394                         if (ret == 0) {
 395                                 init_stat_ex_from_stat(sbuf,
 396                                         &st,
 397                                         lp_fake_dir_create_times(
 398                                                 SNUM(handle->conn)));
 399                         }
 400                 }
 401 #endif
 402         }
 403         return result;
 404 }
 405
 406 static void vfswrap_seekdir(vfs_handle_struct *handle, DIR *dirp, long offset)
 407 {
 408         START_PROFILE(syscall_seekdir);
 409         seekdir(dirp, offset);
 410         END_PROFILE(syscall_seekdir);
 411 }
 412
 413 static long vfswrap_telldir(vfs_handle_struct *handle, DIR *dirp)
 414 {
 415         long result;
 416         START_PROFILE(syscall_telldir);
 417         result = telldir(dirp);
 418         END_PROFILE(syscall_telldir);
 419         return result;
 420 }
 421
 422 static void vfswrap_rewinddir(vfs_handle_struct *handle, DIR *dirp)
 423 {
 424         START_PROFILE(syscall_rewinddir);
 425         rewinddir(dirp);
 426         END_PROFILE(syscall_rewinddir);
 427 }
 428
 429 static int vfswrap_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
 430 {
 431         int result;
 432         bool has_dacl = False;
 433         char *parent = NULL;
 434
 435         START_PROFILE(syscall_mkdir);
 436
 437         if (lp_inherit_acls(SNUM(handle->conn))
 438             && parent_dirname(talloc_tos(), path, &parent, NULL)
 439             && (has_dacl = directory_has_default_acl(handle->conn, parent)))
 440                 mode = (0777 & lp_dir_mask(SNUM(handle->conn)));
 441
 442         TALLOC_FREE(parent);
 443
 444         result = mkdir(path, mode);
 445
 446         if (result == 0 && !has_dacl) {
 447                 /*
 448                  * We need to do this as the default behavior of POSIX ACLs
 449                  * is to set the mask to be the requested group permission
 450                  * bits, not the group permission bits to be the requested
 451                  * group permission bits. This is not what we want, as it will
 452                  * mess up any inherited ACL bits that were set. JRA.
 453                  */
 454                 int saved_errno = errno; /* We may get ENOSYS */
 455                 if ((SMB_VFS_CHMOD_ACL(handle->conn, path, mode) == -1) && (errno == ENOSYS))
 456                         errno = saved_errno;
 457         }
 458
 459         END_PROFILE(syscall_mkdir);
 460         return result;
 461 }
 462
 463 static int vfswrap_rmdir(vfs_handle_struct *handle, const char *path)
 464 {
 465         int result;
 466
 467         START_PROFILE(syscall_rmdir);
 468         result = rmdir(path);
 469         END_PROFILE(syscall_rmdir);
 470         return result;
 471 }
 472
 473 static int vfswrap_closedir(vfs_handle_struct *handle, DIR *dirp)
 474 {
 475         int result;
 476
 477         START_PROFILE(syscall_closedir);
 478         result = closedir(dirp);
 479         END_PROFILE(syscall_closedir);
 480         return result;
 481 }
 482
 483 static void vfswrap_init_search_op(vfs_handle_struct *handle,
 484                                    DIR *dirp)
 485 {
 486         /* Default behavior is a NOOP */
 487 }
 488
 489 /* File operations */
 490
 491 static int vfswrap_open(vfs_handle_struct *handle,
 492                         struct smb_filename *smb_fname,
 493                         files_struct *fsp, int flags, mode_t mode)
 494 {
 495         int result = -1;
 496
 497         START_PROFILE(syscall_open);
 498
 499         if (smb_fname->stream_name) {
 500                 errno = ENOENT;
 501                 goto out;
 502         }
 503
 504         result = open(smb_fname->base_name, flags, mode);
 505  out:
 506         END_PROFILE(syscall_open);
 507         return result;
 508 }
 509
 510 static NTSTATUS vfswrap_create_file(vfs_handle_struct *handle,
 511                                     struct smb_request *req,
 512                                     uint16_t root_dir_fid,
 513                                     struct smb_filename *smb_fname,
 514                                     uint32_t access_mask,
 515                                     uint32_t share_access,
 516                                     uint32_t create_disposition,
 517                                     uint32_t create_options,
 518                                     uint32_t file_attributes,
 519                                     uint32_t oplock_request,
 520                                     uint64_t allocation_size,
 521                                     uint32_t private_flags,
 522                                     struct security_descriptor *sd,
 523                                     struct ea_list *ea_list,
 524                                     files_struct **result,
 525                                     int *pinfo)
 526 {
 527         return create_file_default(handle->conn, req, root_dir_fid, smb_fname,
 528                                    access_mask, share_access,
 529                                    create_disposition, create_options,
 530                                    file_attributes, oplock_request,
 531                                    allocation_size, private_flags,
 532                                    sd, ea_list, result,
 533                                    pinfo);
 534 }
 535
 536 static int vfswrap_close(vfs_handle_struct *handle, files_struct *fsp)
 537 {
 538         int result;
 539
 540         START_PROFILE(syscall_close);
 541         result = fd_close_posix(fsp);
 542         END_PROFILE(syscall_close);
 543         return result;
 544 }
 545
 546 static ssize_t vfswrap_read(vfs_handle_struct *handle, files_struct *fsp, void *data, size_t n)
 547 {
 548         ssize_t result;
 549
 550         START_PROFILE_BYTES(syscall_read, n);
 551         result = sys_read(fsp->fh->fd, data, n);
 552         END_PROFILE(syscall_read);
 553         return result;
 554 }
 555
 556 static ssize_t vfswrap_pread(vfs_handle_struct *handle, files_struct *fsp, void *data,
 557                         size_t n, off_t offset)
 558 {
 559         ssize_t result;
 560
 561 #if defined(HAVE_PREAD) || defined(HAVE_PREAD64)
 562         START_PROFILE_BYTES(syscall_pread, n);
 563         result = sys_pread(fsp->fh->fd, data, n, offset);
 564         END_PROFILE(syscall_pread);
 565
 566         if (result == -1 && errno == ESPIPE) {
 567                 /* Maintain the fiction that pipes can be seeked (sought?) on. */
 568                 result = SMB_VFS_READ(fsp, data, n);
 569                 fsp->fh->pos = 0;
 570         }
 571
 572 #else /* HAVE_PREAD */
 573         off_t   curr;
 574         int lerrno;
 575
 576         curr = SMB_VFS_LSEEK(fsp, 0, SEEK_CUR);
 577         if (curr == -1 && errno == ESPIPE) {
 578                 /* Maintain the fiction that pipes can be seeked (sought?) on. */
 579                 result = SMB_VFS_READ(fsp, data, n);
 580                 fsp->fh->pos = 0;
 581                 return result;
 582         }
 583
 584         if (SMB_VFS_LSEEK(fsp, offset, SEEK_SET) == -1) {
 585                 return -1;
 586         }
 587
 588         errno = 0;
 589         result = SMB_VFS_READ(fsp, data, n);
 590         lerrno = errno;
 591
 592         SMB_VFS_LSEEK(fsp, curr, SEEK_SET);
 593         errno = lerrno;
 594
 595 #endif /* HAVE_PREAD */
 596
 597         return result;
 598 }
 599
 600 static ssize_t vfswrap_write(vfs_handle_struct *handle, files_struct *fsp, const void *data, size_t n)
 601 {
 602         ssize_t result;
 603
 604         START_PROFILE_BYTES(syscall_write, n);
 605         result = sys_write(fsp->fh->fd, data, n);
 606         END_PROFILE(syscall_write);
 607         return result;
 608 }
 609
 610 static ssize_t vfswrap_pwrite(vfs_handle_struct *handle, files_struct *fsp, const void *data,
 611                         size_t n, off_t offset)
 612 {
 613         ssize_t result;
 614
 615 #if defined(HAVE_PWRITE) || defined(HAVE_PRWITE64)
 616         START_PROFILE_BYTES(syscall_pwrite, n);
 617         result = sys_pwrite(fsp->fh->fd, data, n, offset);
 618         END_PROFILE(syscall_pwrite);
 619
 620         if (result == -1 && errno == ESPIPE) {
 621                 /* Maintain the fiction that pipes can be sought on. */
 622                 result = SMB_VFS_WRITE(fsp, data, n);
 623         }
 624
 625 #else /* HAVE_PWRITE */
 626         off_t   curr;
 627         int         lerrno;
 628
 629         curr = SMB_VFS_LSEEK(fsp, 0, SEEK_CUR);
 630         if (curr == -1) {
 631                 return -1;
 632         }
 633
 634         if (SMB_VFS_LSEEK(fsp, offset, SEEK_SET) == -1) {
 635                 return -1;
 636         }
 637
 638         result = SMB_VFS_WRITE(fsp, data, n);
 639         lerrno = errno;
 640
 641         SMB_VFS_LSEEK(fsp, curr, SEEK_SET);
 642         errno = lerrno;
 643
 644 #endif /* HAVE_PWRITE */
 645
 646         return result;
 647 }
 648
 649 static void vfswrap_asys_finished(struct tevent_context *ev,
 650                                   struct tevent_fd *fde,
 651                                   uint16_t flags, void *p);
 652
 653 static bool vfswrap_init_asys_ctx(struct smbXsrv_connection *conn)
 654 {
 655         int ret;
 656         int fd;
 657
 658         if (conn->asys_ctx != NULL) {
 659                 return true;
 660         }
 661         ret = asys_context_init(&conn->asys_ctx, aio_pending_size);
 662         if (ret != 0) {
 663                 DEBUG(1, ("asys_context_init failed: %s\n", strerror(ret)));
 664                 return false;
 665         }
 666
 667         fd = asys_signalfd(conn->asys_ctx);
 668
 669         set_blocking(fd, false);
 670
 671         conn->asys_fde = tevent_add_fd(conn->ev_ctx, conn, fd,
 672                                        TEVENT_FD_READ,
 673                                        vfswrap_asys_finished,
 674                                        conn->asys_ctx);
 675         if (conn->asys_fde == NULL) {
 676                 DEBUG(1, ("tevent_add_fd failed\n"));
 677                 asys_context_destroy(conn->asys_ctx);
 678                 conn->asys_ctx = NULL;
 679                 return false;
 680         }
 681         return true;
 682 }
 683
 684 struct vfswrap_asys_state {
 685         struct asys_context *asys_ctx;
 686         struct tevent_req *req;
 687         ssize_t ret;
 688         int err;
 689 };
 690
 691 static int vfswrap_asys_state_destructor(struct vfswrap_asys_state *s)
 692 {
 693         asys_cancel(s->asys_ctx, s->req);
 694         return 0;
 695 }
 696
 697 static struct tevent_req *vfswrap_pread_send(struct vfs_handle_struct *handle,
 698                                              TALLOC_CTX *mem_ctx,
 699                                              struct tevent_context *ev,
 700                                              struct files_struct *fsp,
 701                                              void *data,
 702                                              size_t n, off_t offset)
 703 {
 704         struct tevent_req *req;
 705         struct vfswrap_asys_state *state;
 706         int ret;
 707
 708         req = tevent_req_create(mem_ctx, &state, struct vfswrap_asys_state);
 709         if (req == NULL) {
 710                 return NULL;
 711         }
 712         if (!vfswrap_init_asys_ctx(handle->conn->sconn->conn)) {
 713                 tevent_req_oom(req);
 714                 return tevent_req_post(req, ev);
 715         }
 716         state->asys_ctx = handle->conn->sconn->conn->asys_ctx;
 717         state->req = req;
 718
 719         ret = asys_pread(state->asys_ctx, fsp->fh->fd, data, n, offset, req);
 720         if (ret != 0) {
 721                 tevent_req_error(req, ret);
 722                 return tevent_req_post(req, ev);
 723         }
 724         talloc_set_destructor(state, vfswrap_asys_state_destructor);
 725
 726         return req;
 727 }
 728
 729 static struct tevent_req *vfswrap_pwrite_send(struct vfs_handle_struct *handle,
 730                                               TALLOC_CTX *mem_ctx,
 731                                               struct tevent_context *ev,
 732                                               struct files_struct *fsp,
 733                                               const void *data,
 734                                               size_t n, off_t offset)
 735 {
 736         struct tevent_req *req;
 737         struct vfswrap_asys_state *state;
 738         int ret;
 739
 740         req = tevent_req_create(mem_ctx, &state, struct vfswrap_asys_state);
 741         if (req == NULL) {
 742                 return NULL;
 743         }
 744         if (!vfswrap_init_asys_ctx(handle->conn->sconn->conn)) {
 745                 tevent_req_oom(req);
 746                 return tevent_req_post(req, ev);
 747         }
 748         state->asys_ctx = handle->conn->sconn->conn->asys_ctx;
 749         state->req = req;
 750
 751         ret = asys_pwrite(state->asys_ctx, fsp->fh->fd, data, n, offset, req);
 752         if (ret != 0) {
 753                 tevent_req_error(req, ret);
 754                 return tevent_req_post(req, ev);
 755         }
 756         talloc_set_destructor(state, vfswrap_asys_state_destructor);
 757
 758         return req;
 759 }
 760
 761 static struct tevent_req *vfswrap_fsync_send(struct vfs_handle_struct *handle,
 762                                              TALLOC_CTX *mem_ctx,
 763                                              struct tevent_context *ev,
 764                                              struct files_struct *fsp)
 765 {
 766         struct tevent_req *req;
 767         struct vfswrap_asys_state *state;
 768         int ret;
 769
 770         req = tevent_req_create(mem_ctx, &state, struct vfswrap_asys_state);
 771         if (req == NULL) {
 772                 return NULL;
 773         }
 774         if (!vfswrap_init_asys_ctx(handle->conn->sconn->conn)) {
 775                 tevent_req_oom(req);
 776                 return tevent_req_post(req, ev);
 777         }
 778         state->asys_ctx = handle->conn->sconn->conn->asys_ctx;
 779         state->req = req;
 780
 781         ret = asys_fsync(state->asys_ctx, fsp->fh->fd, req);
 782         if (ret != 0) {
 783                 tevent_req_error(req, ret);
 784                 return tevent_req_post(req, ev);
 785         }
 786         talloc_set_destructor(state, vfswrap_asys_state_destructor);
 787
 788         return req;
 789 }
 790
 791 static void vfswrap_asys_finished(struct tevent_context *ev,
 792                                         struct tevent_fd *fde,
 793                                         uint16_t flags, void *p)
 794 {
 795         struct asys_context *asys_ctx = (struct asys_context *)p;
 796         struct tevent_req *req;
 797         struct vfswrap_asys_state *state;
 798         int res;
 799         ssize_t ret;
 800         int err;
 801         void *private_data;
 802
 803         if ((flags & TEVENT_FD_READ) == 0) {
 804                 return;
 805         }
 806
 807         while (true) {
 808                 res = asys_result(asys_ctx, &ret, &err, &private_data);
 809                 if (res == EINTR || res == EAGAIN) {
 810                         return;
 811                 }
 812 #ifdef EWOULDBLOCK
 813                 if (res == EWOULDBLOCK) {
 814                         return;
 815                 }
 816 #endif
 817
 818                 if (res == ECANCELED) {
 819                         return;
 820                 }
 821
 822                 if (res != 0) {
 823                         DEBUG(1, ("asys_result returned %s\n", strerror(res)));
 824                         return;
 825                 }
 826
 827                 req = talloc_get_type_abort(private_data, struct tevent_req);
 828                 state = tevent_req_data(req, struct vfswrap_asys_state);
 829
 830                 talloc_set_destructor(state, NULL);
 831
 832                 state->ret = ret;
 833                 state->err = err;
 834                 tevent_req_defer_callback(req, ev);
 835                 tevent_req_done(req);
 836         }
 837 }
 838
 839 static ssize_t vfswrap_asys_ssize_t_recv(struct tevent_req *req, int *err)
 840 {
 841         struct vfswrap_asys_state *state = tevent_req_data(
 842                 req, struct vfswrap_asys_state);
 843
 844         if (tevent_req_is_unix_error(req, err)) {
 845                 return -1;
 846         }
 847         *err = state->err;
 848         return state->ret;
 849 }
 850
 851 static int vfswrap_asys_int_recv(struct tevent_req *req, int *err)
 852 {
 853         struct vfswrap_asys_state *state = tevent_req_data(
 854                 req, struct vfswrap_asys_state);
 855
 856         if (tevent_req_is_unix_error(req, err)) {
 857                 return -1;
 858         }
 859         *err = state->err;
 860         return state->ret;
 861 }
 862
 863 static off_t vfswrap_lseek(vfs_handle_struct *handle, files_struct *fsp, off_t offset, int whence)
 864 {
 865         off_t result = 0;
 866
 867         START_PROFILE(syscall_lseek);
 868
 869         /* Cope with 'stat' file opens. */
 870         if (fsp->fh->fd != -1)
 871                 result = lseek(fsp->fh->fd, offset, whence);
 872
 873         /*
 874          * We want to maintain the fiction that we can seek
 875          * on a fifo for file system purposes. This allows
 876          * people to set up UNIX fifo's that feed data to Windows
 877          * applications. JRA.
 878          */
 879
 880         if((result == -1) && (errno == ESPIPE)) {
 881                 result = 0;
 882                 errno = 0;
 883         }
 884
 885         END_PROFILE(syscall_lseek);
 886         return result;
 887 }
 888
 889 static ssize_t vfswrap_sendfile(vfs_handle_struct *handle, int tofd, files_struct *fromfsp, const DATA_BLOB *hdr,
 890                         off_t offset, size_t n)
 891 {
 892         ssize_t result;
 893
 894         START_PROFILE_BYTES(syscall_sendfile, n);
 895         result = sys_sendfile(tofd, fromfsp->fh->fd, hdr, offset, n);
 896         END_PROFILE(syscall_sendfile);
 897         return result;
 898 }
 899
 900 static ssize_t vfswrap_recvfile(vfs_handle_struct *handle,
 901                         int fromfd,
 902                         files_struct *tofsp,
 903                         off_t offset,
 904                         size_t n)
 905 {
 906         ssize_t result;
 907
 908         START_PROFILE_BYTES(syscall_recvfile, n);
 909         result = sys_recvfile(fromfd, tofsp->fh->fd, offset, n);
 910         END_PROFILE(syscall_recvfile);
 911         return result;
 912 }
 913
 914 static int vfswrap_rename(vfs_handle_struct *handle,
 915                           const struct smb_filename *smb_fname_src,
 916                           const struct smb_filename *smb_fname_dst)
 917 {
 918         int result = -1;
 919
 920         START_PROFILE(syscall_rename);
 921
 922         if (smb_fname_src->stream_name || smb_fname_dst->stream_name) {
 923                 errno = ENOENT;
 924                 goto out;
 925         }
 926
 927         result = rename(smb_fname_src->base_name, smb_fname_dst->base_name);
 928
 929  out:
 930         END_PROFILE(syscall_rename);
 931         return result;
 932 }
 933
 934 static int vfswrap_fsync(vfs_handle_struct *handle, files_struct *fsp)
 935 {
 936 #ifdef HAVE_FSYNC
 937         int result;
 938
 939         START_PROFILE(syscall_fsync);
 940         result = fsync(fsp->fh->fd);
 941         END_PROFILE(syscall_fsync);
 942         return result;
 943 #else
 944         return 0;
 945 #endif
 946 }
 947
 948 static int vfswrap_stat(vfs_handle_struct *handle,
 949                         struct smb_filename *smb_fname)
 950 {
 951         int result = -1;
 952
 953         START_PROFILE(syscall_stat);
 954
 955         if (smb_fname->stream_name) {
 956                 errno = ENOENT;
 957                 goto out;
 958         }
 959
 960         result = sys_stat(smb_fname->base_name, &smb_fname->st,
 961                           lp_fake_dir_create_times(SNUM(handle->conn)));
 962  out:
 963         END_PROFILE(syscall_stat);
 964         return result;
 965 }
 966
 967 static int vfswrap_fstat(vfs_handle_struct *handle, files_struct *fsp, SMB_STRUCT_STAT *sbuf)
 968 {
 969         int result;
 970
 971         START_PROFILE(syscall_fstat);
 972         result = sys_fstat(fsp->fh->fd,
 973                            sbuf, lp_fake_dir_create_times(SNUM(handle->conn)));
 974         END_PROFILE(syscall_fstat);
 975         return result;
 976 }
 977
 978 static int vfswrap_lstat(vfs_handle_struct *handle,
 979                          struct smb_filename *smb_fname)
 980 {
 981         int result = -1;
 982
 983         START_PROFILE(syscall_lstat);
 984
 985         if (smb_fname->stream_name) {
 986                 errno = ENOENT;
 987                 goto out;
 988         }
 989
 990         result = sys_lstat(smb_fname->base_name, &smb_fname->st,
 991                            lp_fake_dir_create_times(SNUM(handle->conn)));
 992  out:
 993         END_PROFILE(syscall_lstat);
 994         return result;
 995 }
 996
 997 static NTSTATUS vfswrap_translate_name(struct vfs_handle_struct *handle,
 998                                        const char *name,
 999                                        enum vfs_translate_direction direction,
1000                                        TALLOC_CTX *mem_ctx,
1001                                        char **mapped_name)
1002 {
1003         return NT_STATUS_NONE_MAPPED;
1004 }
1005
1006 /*
1007  * Implement the default fsctl operation.
1008  */
1009 static bool vfswrap_logged_ioctl_message = false;
1010
1011 static NTSTATUS vfswrap_fsctl(struct vfs_handle_struct *handle,
1012                               struct files_struct *fsp,
1013                               TALLOC_CTX *ctx,
1014                               uint32_t function,
1015                               uint16_t req_flags, /* Needed for UNICODE ... */
1016                               const uint8_t *_in_data,
1017                               uint32_t in_len,
1018                               uint8_t **_out_data,
1019                               uint32_t max_out_len,
1020                               uint32_t *out_len)
1021 {
1022         const char *in_data = (const char *)_in_data;
1023         char **out_data = (char **)_out_data;
1024
1025         switch (function) {
1026         case FSCTL_SET_SPARSE:
1027         {
1028                 bool set_sparse = true;
1029                 NTSTATUS status;
1030
1031                 if (in_len >= 1 && in_data[0] == 0) {
1032                         set_sparse = false;
1033                 }
1034
1035                 status = file_set_sparse(handle->conn, fsp, set_sparse);
1036
1037                 DEBUG(NT_STATUS_IS_OK(status) ? 10 : 9,
1038                       ("FSCTL_SET_SPARSE: fname[%s] set[%u] - %s\n",
1039                        smb_fname_str_dbg(fsp->fsp_name), set_sparse,
1040                        nt_errstr(status)));
1041
1042                 return status;
1043         }
1044
1045         case FSCTL_CREATE_OR_GET_OBJECT_ID:
1046         {
1047                 unsigned char objid[16];
1048                 char *return_data = NULL;
1049
1050                 /* This should return the object-id on this file.
1051                  * I think I'll make this be the inode+dev. JRA.
1052                  */
1053
1054                 DEBUG(10,("FSCTL_CREATE_OR_GET_OBJECT_ID: called on %s\n",
1055                           fsp_fnum_dbg(fsp)));
1056
1057                 *out_len = (max_out_len >= 64) ? 64 : max_out_len;
1058                 /* Hmmm, will this cause problems if less data asked for? */
1059                 return_data = talloc_array(ctx, char, 64);
1060                 if (return_data == NULL) {
1061                         return NT_STATUS_NO_MEMORY;
1062                 }
1063
1064                 /* For backwards compatibility only store the dev/inode. */
1065                 push_file_id_16(return_data, &fsp->file_id);
1066                 memcpy(return_data+16,create_volume_objectid(fsp->conn,objid),16);
1067                 push_file_id_16(return_data+32, &fsp->file_id);
1068                 *out_data = return_data;
1069                 return NT_STATUS_OK;
1070         }
1071
1072         case FSCTL_GET_REPARSE_POINT:
1073         {
1074                 /* Fail it with STATUS_NOT_A_REPARSE_POINT */
1075                 DEBUG(10, ("FSCTL_GET_REPARSE_POINT: called on %s. "
1076                            "Status: NOT_IMPLEMENTED\n", fsp_fnum_dbg(fsp)));
1077                 return NT_STATUS_NOT_A_REPARSE_POINT;
1078         }
1079
1080         case FSCTL_SET_REPARSE_POINT:
1081         {
1082                 /* Fail it with STATUS_NOT_A_REPARSE_POINT */
1083                 DEBUG(10, ("FSCTL_SET_REPARSE_POINT: called on %s. "
1084                            "Status: NOT_IMPLEMENTED\n", fsp_fnum_dbg(fsp)));
1085                 return NT_STATUS_NOT_A_REPARSE_POINT;
1086         }
1087
1088         case FSCTL_GET_SHADOW_COPY_DATA:
1089         {
1090                 /*
1091                  * This is called to retrieve the number of Shadow Copies (a.k.a. snapshots)
1092                  * and return their volume names.  If max_data_count is 16, then it is just
1093                  * asking for the number of volumes and length of the combined names.
1094                  *
1095                  * pdata is the data allocated by our caller, but that uses
1096                  * total_data_count (which is 0 in our case) rather than max_data_count.
1097                  * Allocate the correct amount and return the pointer to let
1098                  * it be deallocated when we return.
1099                  */
1100                 struct shadow_copy_data *shadow_data = NULL;
1101                 bool labels = False;
1102                 uint32 labels_data_count = 0;
1103                 uint32 i;
1104                 char *cur_pdata = NULL;
1105
1106                 if (max_out_len < 16) {
1107                         DEBUG(0,("FSCTL_GET_SHADOW_COPY_DATA: max_data_count(%u) < 16 is invalid!\n",
1108                                 max_out_len));
1109                         return NT_STATUS_INVALID_PARAMETER;
1110                 }
1111
1112                 if (max_out_len > 16) {
1113                         labels = True;
1114                 }
1115
1116                 shadow_data = talloc_zero(ctx, struct shadow_copy_data);
1117                 if (shadow_data == NULL) {
1118                         DEBUG(0,("TALLOC_ZERO() failed!\n"));
1119                         return NT_STATUS_NO_MEMORY;
1120                 }
1121
1122                 /*
1123                  * Call the VFS routine to actually do the work.
1124                  */
1125                 if (SMB_VFS_GET_SHADOW_COPY_DATA(fsp, shadow_data, labels)!=0) {
1126                         TALLOC_FREE(shadow_data);
1127                         if (errno == ENOSYS) {
1128                                 DEBUG(5,("FSCTL_GET_SHADOW_COPY_DATA: connectpath %s, not supported.\n",
1129                                         fsp->conn->connectpath));
1130                                 return NT_STATUS_NOT_SUPPORTED;
1131                         } else {
1132                                 DEBUG(0,("FSCTL_GET_SHADOW_COPY_DATA: connectpath %s, failed.\n",
1133                                         fsp->conn->connectpath));
1134                                 return NT_STATUS_UNSUCCESSFUL;
1135                         }
1136                 }
1137
1138                 labels_data_count = (shadow_data->num_volumes * 2 *
1139                                         sizeof(SHADOW_COPY_LABEL)) + 2;
1140
1141                 if (!labels) {
1142                         *out_len = 16;
1143                 } else {
1144                         *out_len = 12 + labels_data_count + 4;
1145                 }
1146
1147                 if (max_out_len < *out_len) {
1148                         DEBUG(0,("FSCTL_GET_SHADOW_COPY_DATA: max_data_count(%u) too small (%u) bytes needed!\n",
1149                                 max_out_len, *out_len));
1150                         TALLOC_FREE(shadow_data);
1151                         return NT_STATUS_BUFFER_TOO_SMALL;
1152                 }
1153
1154                 cur_pdata = talloc_array(ctx, char, *out_len);
1155                 if (cur_pdata == NULL) {
1156                         TALLOC_FREE(shadow_data);
1157                         return NT_STATUS_NO_MEMORY;
1158                 }
1159
1160                 *out_data = cur_pdata;
1161
1162                 /* num_volumes 4 bytes */
1163                 SIVAL(cur_pdata, 0, shadow_data->num_volumes);
1164
1165                 if (labels) {
1166                         /* num_labels 4 bytes */
1167                         SIVAL(cur_pdata, 4, shadow_data->num_volumes);
1168                 }
1169
1170                 /* needed_data_count 4 bytes */
1171                 SIVAL(cur_pdata, 8, labels_data_count + 4);
1172
1173                 cur_pdata += 12;
1174
1175                 DEBUG(10,("FSCTL_GET_SHADOW_COPY_DATA: %u volumes for path[%s].\n",
1176                           shadow_data->num_volumes, fsp_str_dbg(fsp)));
1177                 if (labels && shadow_data->labels) {
1178                         for (i=0; i<shadow_data->num_volumes; i++) {
1179                                 srvstr_push(cur_pdata, req_flags,
1180                                             cur_pdata, shadow_data->labels[i],
1181                                             2 * sizeof(SHADOW_COPY_LABEL),
1182                                             STR_UNICODE|STR_TERMINATE);
1183                                 cur_pdata += 2 * sizeof(SHADOW_COPY_LABEL);
1184                                 DEBUGADD(10,("Label[%u]: '%s'\n",i,shadow_data->labels[i]));
1185                         }
1186                 }
1187
1188                 TALLOC_FREE(shadow_data);
1189
1190                 return NT_STATUS_OK;
1191         }
1192
1193         case FSCTL_FIND_FILES_BY_SID:
1194         {
1195                 /* pretend this succeeded -
1196                  *
1197                  * we have to send back a list with all files owned by this SID
1198                  *
1199                  * but I have to check that --metze
1200                  */
1201                 struct dom_sid sid;
1202                 uid_t uid;
1203                 size_t sid_len;
1204
1205                 DEBUG(10, ("FSCTL_FIND_FILES_BY_SID: called on %s\n",
1206                            fsp_fnum_dbg(fsp)));
1207
1208                 if (in_len < 8) {
1209                         /* NT_STATUS_BUFFER_TOO_SMALL maybe? */
1210                         return NT_STATUS_INVALID_PARAMETER;
1211                 }
1212
1213                 sid_len = MIN(in_len - 4,SID_MAX_SIZE);
1214
1215                 /* unknown 4 bytes: this is not the length of the sid :-(  */
1216                 /*unknown = IVAL(pdata,0);*/
1217
1218                 if (!sid_parse(in_data + 4, sid_len, &sid)) {
1219                         return NT_STATUS_INVALID_PARAMETER;
1220                 }
1221                 DEBUGADD(10, ("for SID: %s\n", sid_string_dbg(&sid)));
1222
1223                 if (!sid_to_uid(&sid, &uid)) {
1224                         DEBUG(0,("sid_to_uid: failed, sid[%s] sid_len[%lu]\n",
1225                                  sid_string_dbg(&sid),
1226                                  (unsigned long)sid_len));
1227                         uid = (-1);
1228                 }
1229
1230                 /* we can take a look at the find source :-)
1231                  *
1232                  * find ./ -uid $uid  -name '*'   is what we need here
1233                  *
1234                  *
1235                  * and send 4bytes len and then NULL terminated unicode strings
1236                  * for each file
1237                  *
1238                  * but I don't know how to deal with the paged results
1239                  * (maybe we can hang the result anywhere in the fsp struct)
1240                  *
1241                  * but I don't know how to deal with the paged results
1242                  * (maybe we can hang the result anywhere in the fsp struct)
1243                  *
1244                  * we don't send all files at once
1245                  * and at the next we should *not* start from the beginning,
1246                  * so we have to cache the result
1247                  *
1248                  * --metze
1249                  */
1250
1251                 /* this works for now... */
1252                 return NT_STATUS_OK;
1253         }
1254
1255         case FSCTL_QUERY_ALLOCATED_RANGES:
1256         {
1257                 /* FIXME: This is just a dummy reply, telling that all of the
1258                  * file is allocated. MKS cp needs that.
1259                  * Adding the real allocated ranges via FIEMAP on Linux
1260                  * and SEEK_DATA/SEEK_HOLE on Solaris is needed to make
1261                  * this FSCTL correct for sparse files.
1262                  */
1263                 NTSTATUS status;
1264                 uint64_t offset, length;
1265                 char *out_data_tmp = NULL;
1266
1267                 if (in_len != 16) {
1268                         DEBUG(0,("FSCTL_QUERY_ALLOCATED_RANGES: data_count(%u) != 16 is invalid!\n",
1269                                 in_len));
1270                         return NT_STATUS_INVALID_PARAMETER;
1271                 }
1272
1273                 if (max_out_len < 16) {
1274                         DEBUG(0,("FSCTL_QUERY_ALLOCATED_RANGES: max_out_len (%u) < 16 is invalid!\n",
1275                                 max_out_len));
1276                         return NT_STATUS_INVALID_PARAMETER;
1277                 }
1278
1279                 offset = BVAL(in_data,0);
1280                 length = BVAL(in_data,8);
1281
1282                 if (offset + length < offset) {
1283                         /* No 64-bit integer wrap. */
1284                         return NT_STATUS_INVALID_PARAMETER;
1285                 }
1286
1287                 /* Shouldn't this be SMB_VFS_STAT ... ? */
1288                 status = vfs_stat_fsp(fsp);
1289                 if (!NT_STATUS_IS_OK(status)) {
1290                         return status;
1291                 }
1292
1293                 *out_len = 16;
1294                 out_data_tmp = talloc_array(ctx, char, *out_len);
1295                 if (out_data_tmp == NULL) {
1296                         DEBUG(10, ("unable to allocate memory for response\n"));
1297                         return NT_STATUS_NO_MEMORY;
1298                 }
1299
1300                 if (offset > fsp->fsp_name->st.st_ex_size ||
1301                                 fsp->fsp_name->st.st_ex_size == 0 ||
1302                                 length == 0) {
1303                         memset(out_data_tmp, 0, *out_len);
1304                 } else {
1305                         uint64_t end = offset + length;
1306                         end = MIN(end, fsp->fsp_name->st.st_ex_size);
1307                         SBVAL(out_data_tmp, 0, 0);
1308                         SBVAL(out_data_tmp, 8, end);
1309                 }
1310
1311                 *out_data = out_data_tmp;
1312
1313                 return NT_STATUS_OK;
1314         }
1315
1316         case FSCTL_IS_VOLUME_DIRTY:
1317         {
1318                 DEBUG(10,("FSCTL_IS_VOLUME_DIRTY: called on %s "
1319                           "(but remotely not supported)\n", fsp_fnum_dbg(fsp)));
1320                 /*
1321                  * http://msdn.microsoft.com/en-us/library/cc232128%28PROT.10%29.aspx
1322                  * says we have to respond with NT_STATUS_INVALID_PARAMETER
1323                  */
1324                 return NT_STATUS_INVALID_PARAMETER;
1325         }
1326
1327         default:
1328                 /*
1329                  * Only print once ... unfortunately there could be lots of
1330                  * different FSCTLs that are called.
1331                  */
1332                 if (!vfswrap_logged_ioctl_message) {
1333                         vfswrap_logged_ioctl_message = true;
1334                         DEBUG(2, ("%s (0x%x): Currently not implemented.\n",
1335                         __func__, function));
1336                 }
1337         }
1338
1339         return NT_STATUS_NOT_SUPPORTED;
1340 }
1341
1342 struct vfs_cc_state {
1343         off_t copied;
1344         uint8_t buf[65536];
1345 };
1346
1347 static struct tevent_req *vfswrap_copy_chunk_send(struct vfs_handle_struct *handle,
1348                                                   TALLOC_CTX *mem_ctx,
1349                                                   struct tevent_context *ev,
1350                                                   struct files_struct *src_fsp,
1351                                                   off_t src_off,
1352                                                   struct files_struct *dest_fsp,
1353                                                   off_t dest_off,
1354                                                   off_t num)
1355 {
1356         struct tevent_req *req;
1357         struct vfs_cc_state *vfs_cc_state;
1358         NTSTATUS status;
1359
1360         DEBUG(10, ("performing server side copy chunk of length %lu\n",
1361                    (unsigned long)num));
1362
1363         req = tevent_req_create(mem_ctx, &vfs_cc_state, struct vfs_cc_state);
1364         if (req == NULL) {
1365                 return NULL;
1366         }
1367
1368         status = vfs_stat_fsp(src_fsp);
1369         if (tevent_req_nterror(req, status)) {
1370                 return tevent_req_post(req, ev);
1371         }
1372
1373         if (src_fsp->fsp_name->st.st_ex_size < src_off + num) {
1374                 /*
1375                  * [MS-SMB2] 3.3.5.15.6 Handling a Server-Side Data Copy Request
1376                  *   If the SourceOffset or SourceOffset + Length extends beyond
1377                  *   the end of file, the server SHOULD<240> treat this as a
1378                  *   STATUS_END_OF_FILE error.
1379                  * ...
1380                  *   <240> Section 3.3.5.15.6: Windows servers will return
1381                  *   STATUS_INVALID_VIEW_SIZE instead of STATUS_END_OF_FILE.
1382                  */
1383                 tevent_req_nterror(req, NT_STATUS_INVALID_VIEW_SIZE);
1384                 return tevent_req_post(req, ev);
1385         }
1386
1387         /* could use 2.6.33+ sendfile here to do this in kernel */
1388         while (vfs_cc_state->copied < num) {
1389                 ssize_t ret;
1390                 struct lock_struct lck;
1391                 int saved_errno;
1392
1393                 off_t this_num = MIN(sizeof(vfs_cc_state->buf),
1394                                      num - vfs_cc_state->copied);
1395
1396                 init_strict_lock_struct(src_fsp,
1397                                         src_fsp->op->global->open_persistent_id,
1398                                         src_off,
1399                                         this_num,
1400                                         READ_LOCK,
1401                                         &lck);
1402
1403                 if (!SMB_VFS_STRICT_LOCK(src_fsp->conn, src_fsp, &lck)) {
1404                         tevent_req_nterror(req, NT_STATUS_FILE_LOCK_CONFLICT);
1405                         return tevent_req_post(req, ev);
1406                 }
1407
1408                 ret = SMB_VFS_PREAD(src_fsp, vfs_cc_state->buf,
1409                                     this_num, src_off);
1410                 if (ret == -1) {
1411                         saved_errno = errno;
1412                 }
1413
1414                 SMB_VFS_STRICT_UNLOCK(src_fsp->conn, src_fsp, &lck);
1415
1416                 if (ret == -1) {
1417                         errno = saved_errno;
1418                         tevent_req_nterror(req, map_nt_error_from_unix(errno));
1419                         return tevent_req_post(req, ev);
1420                 }
1421                 if (ret != this_num) {
1422                         /* zero tolerance for short reads */
1423                         tevent_req_nterror(req, NT_STATUS_IO_DEVICE_ERROR);
1424                         return tevent_req_post(req, ev);
1425                 }
1426
1427                 src_off += ret;
1428
1429                 init_strict_lock_struct(dest_fsp,
1430                                         dest_fsp->op->global->open_persistent_id,
1431                                         dest_off,
1432                                         this_num,
1433                                         WRITE_LOCK,
1434                                         &lck);
1435
1436                 if (!SMB_VFS_STRICT_LOCK(dest_fsp->conn, dest_fsp, &lck)) {
1437                         tevent_req_nterror(req, NT_STATUS_FILE_LOCK_CONFLICT);
1438                         return tevent_req_post(req, ev);
1439                 }
1440
1441                 ret = SMB_VFS_PWRITE(dest_fsp, vfs_cc_state->buf,
1442                                      this_num, dest_off);
1443                 if (ret == -1) {
1444                         saved_errno = errno;
1445                 }
1446
1447                 SMB_VFS_STRICT_UNLOCK(src_fsp->conn, src_fsp, &lck);
1448
1449                 if (ret == -1) {
1450                         errno = saved_errno;
1451                         tevent_req_nterror(req, map_nt_error_from_unix(errno));
1452                         return tevent_req_post(req, ev);
1453                 }
1454                 if (ret != this_num) {
1455                         /* zero tolerance for short writes */
1456                         tevent_req_nterror(req, NT_STATUS_IO_DEVICE_ERROR);
1457                         return tevent_req_post(req, ev);
1458                 }
1459                 dest_off += ret;
1460
1461                 vfs_cc_state->copied += this_num;
1462         }
1463
1464         tevent_req_done(req);
1465         return tevent_req_post(req, ev);
1466 }
1467
1468 static NTSTATUS vfswrap_copy_chunk_recv(struct vfs_handle_struct *handle,
1469                                         struct tevent_req *req,
1470                                         off_t *copied)
1471 {
1472         struct vfs_cc_state *vfs_cc_state = tevent_req_data(req,
1473                                                         struct vfs_cc_state);
1474         NTSTATUS status;
1475
1476         if (tevent_req_is_nterror(req, &status)) {
1477                 DEBUG(2, ("server side copy chunk failed: %s\n",
1478                           nt_errstr(status)));
1479                 *copied = 0;
1480                 tevent_req_received(req);
1481                 return status;
1482         }
1483
1484         *copied = vfs_cc_state->copied;
1485         DEBUG(10, ("server side copy chunk copied %lu\n",
1486                    (unsigned long)*copied));
1487         tevent_req_received(req);
1488
1489         return NT_STATUS_OK;
1490 }
1491
1492 /********************************************************************
1493  Given a stat buffer return the allocated size on disk, taking into
1494  account sparse files.
1495 ********************************************************************/
1496 static uint64_t vfswrap_get_alloc_size(vfs_handle_struct *handle,
1497                                        struct files_struct *fsp,
1498                                        const SMB_STRUCT_STAT *sbuf)
1499 {
1500         uint64_t result;
1501
1502         START_PROFILE(syscall_get_alloc_size);
1503
1504         if(S_ISDIR(sbuf->st_ex_mode)) {
1505                 result = 0;
1506                 goto out;
1507         }
1508
1509 #if defined(HAVE_STAT_ST_BLOCKS) && defined(STAT_ST_BLOCKSIZE)
1510         /* The type of st_blocksize is blkcnt_t which *MUST* be
1511            signed (according to POSIX) and can be less than 64-bits.
1512            Ensure when we're converting to 64 bits wide we don't
1513            sign extend. */
1514 #if defined(SIZEOF_BLKCNT_T_8)
1515         result = (uint64_t)STAT_ST_BLOCKSIZE * (uint64_t)sbuf->st_ex_blocks;
1516 #elif defined(SIZEOF_BLKCNT_T_4)
1517         {
1518                 uint64_t bs = ((uint64_t)sbuf->st_ex_blocks) & 0xFFFFFFFFLL;
1519                 result = (uint64_t)STAT_ST_BLOCKSIZE * bs;
1520         }
1521 #else
1522 #error SIZEOF_BLKCNT_T_NOT_A_SUPPORTED_VALUE
1523 #endif
1524 #else
1525         result = get_file_size_stat(sbuf);
1526 #endif
1527
1528         if (fsp && fsp->initial_allocation_size)
1529                 result = MAX(result,fsp->initial_allocation_size);
1530
1531         result = smb_roundup(handle->conn, result);
1532
1533  out:
1534         END_PROFILE(syscall_get_alloc_size);
1535         return result;
1536 }
1537
1538 static int vfswrap_unlink(vfs_handle_struct *handle,
1539                           const struct smb_filename *smb_fname)
1540 {
1541         int result = -1;
1542
1543         START_PROFILE(syscall_unlink);
1544
1545         if (smb_fname->stream_name) {
1546                 errno = ENOENT;
1547                 goto out;
1548         }
1549         result = unlink(smb_fname->base_name);
1550
1551  out:
1552         END_PROFILE(syscall_unlink);
1553         return result;
1554 }
1555
1556 static int vfswrap_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
1557 {
1558         int result;
1559
1560         START_PROFILE(syscall_chmod);
1561
1562         /*
1563          * We need to do this due to the fact that the default POSIX ACL
1564          * chmod modifies the ACL *mask* for the group owner, not the
1565          * group owner bits directly. JRA.
1566          */
1567
1568
1569         {
1570                 int saved_errno = errno; /* We might get ENOSYS */
1571                 if ((result = SMB_VFS_CHMOD_ACL(handle->conn, path, mode)) == 0) {
1572                         END_PROFILE(syscall_chmod);
1573                         return result;
1574                 }
1575                 /* Error - return the old errno. */
1576                 errno = saved_errno;
1577         }
1578
1579         result = chmod(path, mode);
1580         END_PROFILE(syscall_chmod);
1581         return result;
1582 }
1583
1584 static int vfswrap_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
1585 {
1586         int result;
1587
1588         START_PROFILE(syscall_fchmod);
1589
1590         /*
1591          * We need to do this due to the fact that the default POSIX ACL
1592          * chmod modifies the ACL *mask* for the group owner, not the
1593          * group owner bits directly. JRA.
1594          */
1595
1596         {
1597                 int saved_errno = errno; /* We might get ENOSYS */
1598                 if ((result = SMB_VFS_FCHMOD_ACL(fsp, mode)) == 0) {
1599                         END_PROFILE(syscall_fchmod);
1600                         return result;
1601                 }
1602                 /* Error - return the old errno. */
1603                 errno = saved_errno;
1604         }
1605
1606 #if defined(HAVE_FCHMOD)
1607         result = fchmod(fsp->fh->fd, mode);
1608 #else
1609         result = -1;
1610         errno = ENOSYS;
1611 #endif
1612
1613         END_PROFILE(syscall_fchmod);
1614         return result;
1615 }
1616
1617 static int vfswrap_chown(vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid)
1618 {
1619         int result;
1620
1621         START_PROFILE(syscall_chown);
1622         result = chown(path, uid, gid);
1623         END_PROFILE(syscall_chown);
1624         return result;
1625 }
1626
1627 static int vfswrap_fchown(vfs_handle_struct *handle, files_struct *fsp, uid_t uid, gid_t gid)
1628 {
1629 #ifdef HAVE_FCHOWN
1630         int result;
1631
1632         START_PROFILE(syscall_fchown);
1633         result = fchown(fsp->fh->fd, uid, gid);
1634         END_PROFILE(syscall_fchown);
1635         return result;
1636 #else
1637         errno = ENOSYS;
1638         return -1;
1639 #endif
1640 }
1641
1642 static int vfswrap_lchown(vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid)
1643 {
1644         int result;
1645
1646         START_PROFILE(syscall_lchown);
1647         result = lchown(path, uid, gid);
1648         END_PROFILE(syscall_lchown);
1649         return result;
1650 }
1651
1652 static int vfswrap_chdir(vfs_handle_struct *handle, const char *path)
1653 {
1654         int result;
1655
1656         START_PROFILE(syscall_chdir);
1657         result = chdir(path);
1658         END_PROFILE(syscall_chdir);
1659         return result;
1660 }
1661
1662 static char *vfswrap_getwd(vfs_handle_struct *handle)
1663 {
1664         char *result;
1665
1666         START_PROFILE(syscall_getwd);
1667         result = sys_getwd();
1668         END_PROFILE(syscall_getwd);
1669         return result;
1670 }
1671
1672 /*********************************************************************
1673  nsec timestamp resolution call. Convert down to whatever the underlying
1674  system will support.
1675 **********************************************************************/
1676
1677 static int vfswrap_ntimes(vfs_handle_struct *handle,
1678                           const struct smb_filename *smb_fname,
1679                           struct smb_file_time *ft)
1680 {
1681         int result = -1;
1682
1683         START_PROFILE(syscall_ntimes);
1684
1685         if (smb_fname->stream_name) {
1686                 errno = ENOENT;
1687                 goto out;
1688         }
1689
1690         if (ft != NULL) {
1691                 if (null_timespec(ft->atime)) {
1692                         ft->atime= smb_fname->st.st_ex_atime;
1693                 }
1694
1695                 if (null_timespec(ft->mtime)) {
1696                         ft->mtime = smb_fname->st.st_ex_mtime;
1697                 }
1698
1699                 if (!null_timespec(ft->create_time)) {
1700                         set_create_timespec_ea(handle->conn,
1701                                                smb_fname,
1702                                                ft->create_time);
1703                 }
1704
1705                 if ((timespec_compare(&ft->atime,
1706                                       &smb_fname->st.st_ex_atime) == 0) &&
1707                     (timespec_compare(&ft->mtime,
1708                                       &smb_fname->st.st_ex_mtime) == 0)) {
1709                         return 0;
1710                 }
1711         }
1712
1713 #if defined(HAVE_UTIMENSAT)
1714         if (ft != NULL) {
1715                 struct timespec ts[2];
1716                 ts[0] = ft->atime;
1717                 ts[1] = ft->mtime;
1718                 result = utimensat(AT_FDCWD, smb_fname->base_name, ts, 0);
1719         } else {
1720                 result = utimensat(AT_FDCWD, smb_fname->base_name, NULL, 0);
1721         }
1722         if (!((result == -1) && (errno == ENOSYS))) {
1723                 goto out;
1724         }
1725 #endif
1726 #if defined(HAVE_UTIMES)
1727         if (ft != NULL) {
1728                 struct timeval tv[2];
1729                 tv[0] = convert_timespec_to_timeval(ft->atime);
1730                 tv[1] = convert_timespec_to_timeval(ft->mtime);
1731                 result = utimes(smb_fname->base_name, tv);
1732         } else {
1733                 result = utimes(smb_fname->base_name, NULL);
1734         }
1735         if (!((result == -1) && (errno == ENOSYS))) {
1736                 goto out;
1737         }
1738 #endif
1739 #if defined(HAVE_UTIME)
1740         if (ft != NULL) {
1741                 struct utimbuf times;
1742                 times.actime = convert_timespec_to_time_t(ft->atime);
1743                 times.modtime = convert_timespec_to_time_t(ft->mtime);
1744                 result = utime(smb_fname->base_name, &times);
1745         } else {
1746                 result = utime(smb_fname->base_name, NULL);
1747         }
1748         if (!((result == -1) && (errno == ENOSYS))) {
1749                 goto out;
1750         }
1751 #endif
1752         errno = ENOSYS;
1753         result = -1;
1754
1755  out:
1756         END_PROFILE(syscall_ntimes);
1757         return result;
1758 }
1759
1760 /*********************************************************************
1761  A version of ftruncate that will write the space on disk if strict
1762  allocate is set.
1763 **********************************************************************/
1764
1765 static int strict_allocate_ftruncate(vfs_handle_struct *handle, files_struct *fsp, off_t len)
1766 {
1767         off_t space_to_write;
1768         uint64_t space_avail;
1769         uint64_t bsize,dfree,dsize;
1770         int ret;
1771         NTSTATUS status;
1772         SMB_STRUCT_STAT *pst;
1773
1774         status = vfs_stat_fsp(fsp);
1775         if (!NT_STATUS_IS_OK(status)) {
1776                 return -1;
1777         }
1778         pst = &fsp->fsp_name->st;
1779
1780 #ifdef S_ISFIFO
1781         if (S_ISFIFO(pst->st_ex_mode))
1782                 return 0;
1783 #endif
1784
1785         if (pst->st_ex_size == len)
1786                 return 0;
1787
1788         /* Shrink - just ftruncate. */
1789         if (pst->st_ex_size > len)
1790                 return ftruncate(fsp->fh->fd, len);
1791
1792         space_to_write = len - pst->st_ex_size;
1793
1794         /* for allocation try fallocate first. This can fail on some
1795            platforms e.g. when the filesystem doesn't support it and no
1796            emulation is being done by the libc (like on AIX with JFS1). In that
1797            case we do our own emulation. fallocate implementations can
1798            return ENOTSUP or EINVAL in cases like that. */
1799         ret = SMB_VFS_FALLOCATE(fsp, VFS_FALLOCATE_EXTEND_SIZE,
1800                                 pst->st_ex_size, space_to_write);
1801         if (ret == ENOSPC) {
1802                 errno = ENOSPC;
1803                 return -1;
1804         }
1805         if (ret == 0) {
1806                 return 0;
1807         }
1808         DEBUG(10,("strict_allocate_ftruncate: SMB_VFS_FALLOCATE failed with "
1809                 "error %d. Falling back to slow manual allocation\n", ret));
1810
1811         /* available disk space is enough or not? */
1812         space_avail = get_dfree_info(fsp->conn,
1813                                      fsp->fsp_name->base_name, false,
1814                                      &bsize,&dfree,&dsize);
1815         /* space_avail is 1k blocks */
1816         if (space_avail == (uint64_t)-1 ||
1817                         ((uint64_t)space_to_write/1024 > space_avail) ) {
1818                 errno = ENOSPC;
1819                 return -1;
1820         }
1821
1822         /* Write out the real space on disk. */
1823         ret = vfs_slow_fallocate(fsp, pst->st_ex_size, space_to_write);
1824         if (ret != 0) {
1825                 errno = ret;
1826                 ret = -1;
1827         }
1828
1829         return 0;
1830 }
1831
1832 static int vfswrap_ftruncate(vfs_handle_struct *handle, files_struct *fsp, off_t len)
1833 {
1834         int result = -1;
1835         SMB_STRUCT_STAT *pst;
1836         NTSTATUS status;
1837         char c = 0;
1838
1839         START_PROFILE(syscall_ftruncate);
1840
1841         if (lp_strict_allocate(SNUM(fsp->conn)) && !fsp->is_sparse) {
1842                 result = strict_allocate_ftruncate(handle, fsp, len);
1843                 END_PROFILE(syscall_ftruncate);
1844                 return result;
1845         }
1846
1847         /* we used to just check HAVE_FTRUNCATE_EXTEND and only use
1848            ftruncate if the system supports it. Then I discovered that
1849            you can have some filesystems that support ftruncate
1850            expansion and some that don't! On Linux fat can't do
1851            ftruncate extend but ext2 can. */
1852
1853         result = ftruncate(fsp->fh->fd, len);
1854         if (result == 0)
1855                 goto done;
1856
1857         /* According to W. R. Stevens advanced UNIX prog. Pure 4.3 BSD cannot
1858            extend a file with ftruncate. Provide alternate implementation
1859            for this */
1860
1861         /* Do an fstat to see if the file is longer than the requested
1862            size in which case the ftruncate above should have
1863            succeeded or shorter, in which case seek to len - 1 and
1864            write 1 byte of zero */
1865         status = vfs_stat_fsp(fsp);
1866         if (!NT_STATUS_IS_OK(status)) {
1867                 goto done;
1868         }
1869         pst = &fsp->fsp_name->st;
1870
1871 #ifdef S_ISFIFO
1872         if (S_ISFIFO(pst->st_ex_mode)) {
1873                 result = 0;
1874                 goto done;
1875         }
1876 #endif
1877
1878         if (pst->st_ex_size == len) {
1879                 result = 0;
1880                 goto done;
1881         }
1882
1883         if (pst->st_ex_size > len) {
1884                 /* the ftruncate should have worked */
1885                 goto done;
1886         }
1887
1888         if (SMB_VFS_PWRITE(fsp, &c, 1, len-1)!=1) {
1889                 goto done;
1890         }
1891
1892         result = 0;
1893
1894   done:
1895
1896         END_PROFILE(syscall_ftruncate);
1897         return result;
1898 }
1899
1900 static int vfswrap_fallocate(vfs_handle_struct *handle,
1901                         files_struct *fsp,
1902                         enum vfs_fallocate_mode mode,
1903                         off_t offset,
1904                         off_t len)
1905 {
1906         int result;
1907
1908         START_PROFILE(syscall_fallocate);
1909         if (mode == VFS_FALLOCATE_EXTEND_SIZE) {
1910                 result = sys_posix_fallocate(fsp->fh->fd, offset, len);
1911         } else if (mode == VFS_FALLOCATE_KEEP_SIZE) {
1912                 result = sys_fallocate(fsp->fh->fd, mode, offset, len);
1913         } else {
1914                 errno = EINVAL;
1915                 result = -1;
1916         }
1917         END_PROFILE(syscall_fallocate);
1918         return result;
1919 }
1920
1921 static bool vfswrap_lock(vfs_handle_struct *handle, files_struct *fsp, int op, off_t offset, off_t count, int type)
1922 {
1923         bool result;
1924
1925         START_PROFILE(syscall_fcntl_lock);
1926         result =  fcntl_lock(fsp->fh->fd, op, offset, count, type);
1927         END_PROFILE(syscall_fcntl_lock);
1928         return result;
1929 }
1930
1931 static int vfswrap_kernel_flock(vfs_handle_struct *handle, files_struct *fsp,
1932                                 uint32 share_mode, uint32 access_mask)
1933 {
1934         START_PROFILE(syscall_kernel_flock);
1935         kernel_flock(fsp->fh->fd, share_mode, access_mask);
1936         END_PROFILE(syscall_kernel_flock);
1937         return 0;
1938 }
1939
1940 static bool vfswrap_getlock(vfs_handle_struct *handle, files_struct *fsp, off_t *poffset, off_t *pcount, int *ptype, pid_t *ppid)
1941 {
1942         bool result;
1943
1944         START_PROFILE(syscall_fcntl_getlock);
1945         result =  fcntl_getlock(fsp->fh->fd, poffset, pcount, ptype, ppid);
1946         END_PROFILE(syscall_fcntl_getlock);
1947         return result;
1948 }
1949
1950 static int vfswrap_linux_setlease(vfs_handle_struct *handle, files_struct *fsp,
1951                                 int leasetype)
1952 {
1953         int result = -1;
1954
1955         START_PROFILE(syscall_linux_setlease);
1956
1957 #ifdef HAVE_KERNEL_OPLOCKS_LINUX
1958         result = linux_setlease(fsp->fh->fd, leasetype);
1959 #else
1960         errno = ENOSYS;
1961 #endif
1962         END_PROFILE(syscall_linux_setlease);
1963         return result;
1964 }
1965
1966 static int vfswrap_symlink(vfs_handle_struct *handle, const char *oldpath, const char *newpath)
1967 {
1968         int result;
1969
1970         START_PROFILE(syscall_symlink);
1971         result = symlink(oldpath, newpath);
1972         END_PROFILE(syscall_symlink);
1973         return result;
1974 }
1975
1976 static int vfswrap_readlink(vfs_handle_struct *handle, const char *path, char *buf, size_t bufsiz)
1977 {
1978         int result;
1979
1980         START_PROFILE(syscall_readlink);
1981         result = readlink(path, buf, bufsiz);
1982         END_PROFILE(syscall_readlink);
1983         return result;
1984 }
1985
1986 static int vfswrap_link(vfs_handle_struct *handle, const char *oldpath, const char *newpath)
1987 {
1988         int result;
1989
1990         START_PROFILE(syscall_link);
1991         result = link(oldpath, newpath);
1992         END_PROFILE(syscall_link);
1993         return result;
1994 }
1995
1996 static int vfswrap_mknod(vfs_handle_struct *handle, const char *pathname, mode_t mode, SMB_DEV_T dev)
1997 {
1998         int result;
1999
2000         START_PROFILE(syscall_mknod);
2001         result = sys_mknod(pathname, mode, dev);
2002         END_PROFILE(syscall_mknod);
2003         return result;
2004 }
2005
2006 static char *vfswrap_realpath(vfs_handle_struct *handle, const char *path)
2007 {
2008         char *result;
2009
2010         START_PROFILE(syscall_realpath);
2011 #ifdef REALPATH_TAKES_NULL
2012         result = realpath(path, NULL);
2013 #else
2014         result = SMB_MALLOC_ARRAY(char, PATH_MAX+1);
2015         if (result) {
2016                 char *resolved_path = realpath(path, result);
2017                 if (!resolved_path) {
2018                         SAFE_FREE(result);
2019                 } else {
2020                         /* SMB_ASSERT(result == resolved_path) ? */
2021                         result = resolved_path;
2022                 }
2023         }
2024 #endif
2025         END_PROFILE(syscall_realpath);
2026         return result;
2027 }
2028
2029 static NTSTATUS vfswrap_notify_watch(vfs_handle_struct *vfs_handle,
2030                                      struct sys_notify_context *ctx,
2031                                      const char *path,
2032                                      uint32_t *filter,
2033                                      uint32_t *subdir_filter,
2034                                      void (*callback)(struct sys_notify_context *ctx,
2035                                                       void *private_data,
2036                                                       struct notify_event *ev),
2037                                      void *private_data, void *handle)
2038 {
2039         /*
2040          * So far inotify is the only supported default notify mechanism. If
2041          * another platform like the the BSD's or a proprietary Unix comes
2042          * along and wants another default, we can play the same trick we
2043          * played with Posix ACLs.
2044          *
2045          * Until that is the case, hard-code inotify here.
2046          */
2047 #ifdef HAVE_INOTIFY
2048         if (lp_kernel_change_notify(vfs_handle->conn->params)) {
2049                 return inotify_watch(ctx, path, filter, subdir_filter,
2050                                      callback, private_data, handle);
2051         }
2052 #endif
2053         /*
2054          * Do nothing, leave everything to notify_internal.c
2055          */
2056         return NT_STATUS_OK;
2057 }
2058
2059 static int vfswrap_chflags(vfs_handle_struct *handle, const char *path,
2060                            unsigned int flags)
2061 {
2062 #ifdef HAVE_CHFLAGS
2063         return chflags(path, flags);
2064 #else
2065         errno = ENOSYS;
2066         return -1;
2067 #endif
2068 }
2069
2070 static struct file_id vfswrap_file_id_create(struct vfs_handle_struct *handle,
2071                                              const SMB_STRUCT_STAT *sbuf)
2072 {
2073         struct file_id key;
2074
2075         /* the ZERO_STRUCT ensures padding doesn't break using the key as a
2076          * blob */
2077         ZERO_STRUCT(key);
2078
2079         key.devid = sbuf->st_ex_dev;
2080         key.inode = sbuf->st_ex_ino;
2081         /* key.extid is unused by default. */
2082
2083         return key;
2084 }
2085
2086 static NTSTATUS vfswrap_streaminfo(vfs_handle_struct *handle,
2087                                    struct files_struct *fsp,
2088                                    const char *fname,
2089                                    TALLOC_CTX *mem_ctx,
2090                                    unsigned int *pnum_streams,
2091                                    struct stream_struct **pstreams)
2092 {
2093         SMB_STRUCT_STAT sbuf;
2094         struct stream_struct *tmp_streams = NULL;
2095         int ret;
2096
2097         if ((fsp != NULL) && (fsp->is_directory)) {
2098                 /*
2099                  * No default streams on directories
2100                  */
2101                 goto done;
2102         }
2103
2104         if ((fsp != NULL) && (fsp->fh->fd != -1)) {
2105                 ret = SMB_VFS_FSTAT(fsp, &sbuf);
2106         }
2107         else {
2108                 struct smb_filename smb_fname;
2109
2110                 ZERO_STRUCT(smb_fname);
2111                 smb_fname.base_name = discard_const_p(char, fname);
2112
2113                 if (lp_posix_pathnames()) {
2114                         ret = SMB_VFS_LSTAT(handle->conn, &smb_fname);
2115                 } else {
2116                         ret = SMB_VFS_STAT(handle->conn, &smb_fname);
2117                 }
2118                 sbuf = smb_fname.st;
2119         }
2120
2121         if (ret == -1) {
2122                 return map_nt_error_from_unix(errno);
2123         }
2124
2125         if (S_ISDIR(sbuf.st_ex_mode)) {
2126                 goto done;
2127         }
2128
2129         tmp_streams = talloc_realloc(mem_ctx, *pstreams, struct stream_struct,
2130                                         (*pnum_streams) + 1);
2131         if (tmp_streams == NULL) {
2132                 return NT_STATUS_NO_MEMORY;
2133         }
2134         tmp_streams[*pnum_streams].name = talloc_strdup(tmp_streams, "::$DATA");
2135         if (tmp_streams[*pnum_streams].name == NULL) {
2136                 return NT_STATUS_NO_MEMORY;
2137         }
2138         tmp_streams[*pnum_streams].size = sbuf.st_ex_size;
2139         tmp_streams[*pnum_streams].alloc_size = SMB_VFS_GET_ALLOC_SIZE(handle->conn, fsp, &sbuf);
2140
2141         *pnum_streams += 1;
2142         *pstreams = tmp_streams;
2143  done:
2144         return NT_STATUS_OK;
2145 }
2146
2147 static int vfswrap_get_real_filename(struct vfs_handle_struct *handle,
2148                                      const char *path,
2149                                      const char *name,
2150                                      TALLOC_CTX *mem_ctx,
2151                                      char **found_name)
2152 {
2153         /*
2154          * Don't fall back to get_real_filename so callers can differentiate
2155          * between a full directory scan and an actual case-insensitive stat.
2156          */
2157         errno = EOPNOTSUPP;
2158         return -1;
2159 }
2160
2161 static const char *vfswrap_connectpath(struct vfs_handle_struct *handle,
2162                                        const char *fname)
2163 {
2164         return handle->conn->connectpath;
2165 }
2166
2167 static NTSTATUS vfswrap_brl_lock_windows(struct vfs_handle_struct *handle,
2168                                          struct byte_range_lock *br_lck,
2169                                          struct lock_struct *plock,
2170                                          bool blocking_lock,
2171                                          struct blocking_lock_record *blr)
2172 {
2173         SMB_ASSERT(plock->lock_flav == WINDOWS_LOCK);
2174
2175         /* Note: blr is not used in the default implementation. */
2176         return brl_lock_windows_default(br_lck, plock, blocking_lock);
2177 }
2178
2179 static bool vfswrap_brl_unlock_windows(struct vfs_handle_struct *handle,
2180                                        struct messaging_context *msg_ctx,
2181                                        struct byte_range_lock *br_lck,
2182                                        const struct lock_struct *plock)
2183 {
2184         SMB_ASSERT(plock->lock_flav == WINDOWS_LOCK);
2185
2186         return brl_unlock_windows_default(msg_ctx, br_lck, plock);
2187 }
2188
2189 static bool vfswrap_brl_cancel_windows(struct vfs_handle_struct *handle,
2190                                        struct byte_range_lock *br_lck,
2191                                        struct lock_struct *plock,
2192                                        struct blocking_lock_record *blr)
2193 {
2194         SMB_ASSERT(plock->lock_flav == WINDOWS_LOCK);
2195
2196         /* Note: blr is not used in the default implementation. */
2197         return brl_lock_cancel_default(br_lck, plock);
2198 }
2199
2200 static bool vfswrap_strict_lock(struct vfs_handle_struct *handle,
2201                                 files_struct *fsp,
2202                                 struct lock_struct *plock)
2203 {
2204         SMB_ASSERT(plock->lock_type == READ_LOCK ||
2205             plock->lock_type == WRITE_LOCK);
2206
2207         return strict_lock_default(fsp, plock);
2208 }
2209
2210 static void vfswrap_strict_unlock(struct vfs_handle_struct *handle,
2211                                 files_struct *fsp,
2212                                 struct lock_struct *plock)
2213 {
2214         SMB_ASSERT(plock->lock_type == READ_LOCK ||
2215             plock->lock_type == WRITE_LOCK);
2216
2217         strict_unlock_default(fsp, plock);
2218 }
2219
2220 /* NT ACL operations. */
2221
2222 static NTSTATUS vfswrap_fget_nt_acl(vfs_handle_struct *handle,
2223                                     files_struct *fsp,
2224                                     uint32 security_info,
2225                                     TALLOC_CTX *mem_ctx,
2226                                     struct security_descriptor **ppdesc)
2227 {
2228         NTSTATUS result;
2229
2230         START_PROFILE(fget_nt_acl);
2231         result = posix_fget_nt_acl(fsp, security_info,
2232                                    mem_ctx, ppdesc);
2233         END_PROFILE(fget_nt_acl);
2234         return result;
2235 }
2236
2237 static NTSTATUS vfswrap_get_nt_acl(vfs_handle_struct *handle,
2238                                    const char *name,
2239                                    uint32 security_info,
2240                                    TALLOC_CTX *mem_ctx,
2241                                    struct security_descriptor **ppdesc)
2242 {
2243         NTSTATUS result;
2244
2245         START_PROFILE(get_nt_acl);
2246         result = posix_get_nt_acl(handle->conn, name, security_info,
2247                                   mem_ctx, ppdesc);
2248         END_PROFILE(get_nt_acl);
2249         return result;
2250 }
2251
2252 static NTSTATUS vfswrap_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp, uint32 security_info_sent, const struct security_descriptor *psd)
2253 {
2254         NTSTATUS result;
2255
2256         START_PROFILE(fset_nt_acl);
2257         result = set_nt_acl(fsp, security_info_sent, psd);
2258         END_PROFILE(fset_nt_acl);
2259         return result;
2260 }
2261
2262 static NTSTATUS vfswrap_audit_file(struct vfs_handle_struct *handle,
2263                                    struct smb_filename *file,
2264                                    struct security_acl *sacl,
2265                                    uint32_t access_requested,
2266                                    uint32_t access_denied)
2267 {
2268         return NT_STATUS_OK; /* Nothing to do here ... */
2269 }
2270
2271 static int vfswrap_chmod_acl(vfs_handle_struct *handle, const char *name, mode_t mode)
2272 {
2273 #ifdef HAVE_NO_ACL
2274         errno = ENOSYS;
2275         return -1;
2276 #else
2277         int result;
2278
2279         START_PROFILE(chmod_acl);
2280         result = chmod_acl(handle->conn, name, mode);
2281         END_PROFILE(chmod_acl);
2282         return result;
2283 #endif
2284 }
2285
2286 static int vfswrap_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
2287 {
2288 #ifdef HAVE_NO_ACL
2289         errno = ENOSYS;
2290         return -1;
2291 #else
2292         int result;
2293
2294         START_PROFILE(fchmod_acl);
2295         result = fchmod_acl(fsp, mode);
2296         END_PROFILE(fchmod_acl);
2297         return result;
2298 #endif
2299 }
2300
2301 static SMB_ACL_T vfswrap_sys_acl_get_file(vfs_handle_struct *handle,
2302                                           const char *path_p,
2303                                           SMB_ACL_TYPE_T type,
2304                                           TALLOC_CTX *mem_ctx)
2305 {
2306         return sys_acl_get_file(handle, path_p, type, mem_ctx);
2307 }
2308
2309 static SMB_ACL_T vfswrap_sys_acl_get_fd(vfs_handle_struct *handle,
2310                                         files_struct *fsp,
2311                                         TALLOC_CTX *mem_ctx)
2312 {
2313         return sys_acl_get_fd(handle, fsp, mem_ctx);
2314 }
2315
2316 static int vfswrap_sys_acl_set_file(vfs_handle_struct *handle, const char *name, SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl)
2317 {
2318         return sys_acl_set_file(handle, name, acltype, theacl);
2319 }
2320
2321 static int vfswrap_sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp, SMB_ACL_T theacl)
2322 {
2323         return sys_acl_set_fd(handle, fsp, theacl);
2324 }
2325
2326 static int vfswrap_sys_acl_delete_def_file(vfs_handle_struct *handle, const char *path)
2327 {
2328         return sys_acl_delete_def_file(handle, path);
2329 }
2330
2331 /****************************************************************
2332  Extended attribute operations.
2333 *****************************************************************/
2334
2335 static ssize_t vfswrap_getxattr(struct vfs_handle_struct *handle,const char *path, const char *name, void *value, size_t size)
2336 {
2337         return getxattr(path, name, value, size);
2338 }
2339
2340 static ssize_t vfswrap_fgetxattr(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name, void *value, size_t size)
2341 {
2342         return fgetxattr(fsp->fh->fd, name, value, size);
2343 }
2344
2345 static ssize_t vfswrap_listxattr(struct vfs_handle_struct *handle, const char *path, char *list, size_t size)
2346 {
2347         return listxattr(path, list, size);
2348 }
2349
2350 static ssize_t vfswrap_flistxattr(struct vfs_handle_struct *handle, struct files_struct *fsp, char *list, size_t size)
2351 {
2352         return flistxattr(fsp->fh->fd, list, size);
2353 }
2354
2355 static int vfswrap_removexattr(struct vfs_handle_struct *handle, const char *path, const char *name)
2356 {
2357         return removexattr(path, name);
2358 }
2359
2360 static int vfswrap_fremovexattr(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name)
2361 {
2362         return fremovexattr(fsp->fh->fd, name);
2363 }
2364
2365 static int vfswrap_setxattr(struct vfs_handle_struct *handle, const char *path, const char *name, const void *value, size_t size, int flags)
2366 {
2367         return setxattr(path, name, value, size, flags);
2368 }
2369
2370 static int vfswrap_fsetxattr(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name, const void *value, size_t size, int flags)
2371 {
2372         return fsetxattr(fsp->fh->fd, name, value, size, flags);
2373 }
2374
2375 static bool vfswrap_aio_force(struct vfs_handle_struct *handle, struct files_struct *fsp)
2376 {
2377         return false;
2378 }
2379
2380 static bool vfswrap_is_offline(struct vfs_handle_struct *handle,
2381                                const struct smb_filename *fname,
2382                                SMB_STRUCT_STAT *sbuf)
2383 {
2384         NTSTATUS status;
2385         char *path;
2386         bool offline = false;
2387
2388         if (ISDOT(fname->base_name) || ISDOTDOT(fname->base_name)) {
2389                 return false;
2390         }
2391
2392         if (!lp_dmapi_support(SNUM(handle->conn)) || !dmapi_have_session()) {
2393 #if defined(ENOTSUP)
2394                 errno = ENOTSUP;
2395 #endif
2396                 return false;
2397         }
2398
2399         status = get_full_smb_filename(talloc_tos(), fname, &path);
2400         if (!NT_STATUS_IS_OK(status)) {
2401                 errno = map_errno_from_nt_status(status);
2402                 return false;
2403         }
2404
2405         offline = (dmapi_file_flags(path) & FILE_ATTRIBUTE_OFFLINE) != 0;
2406
2407         TALLOC_FREE(path);
2408
2409         return offline;
2410 }
2411
2412 static int vfswrap_set_offline(struct vfs_handle_struct *handle,
2413                                const struct smb_filename *fname)
2414 {
2415         /* We don't know how to set offline bit by default, needs to be overriden in the vfs modules */
2416 #if defined(ENOTSUP)
2417         errno = ENOTSUP;
2418 #endif
2419         return -1;
2420 }
2421
2422 static NTSTATUS vfswrap_durable_cookie(struct vfs_handle_struct *handle,
2423                                        struct files_struct *fsp,
2424                                        TALLOC_CTX *mem_ctx,
2425                                        DATA_BLOB *cookie)
2426 {
2427         return vfs_default_durable_cookie(fsp, mem_ctx, cookie);
2428 }
2429
2430 static NTSTATUS vfswrap_durable_disconnect(struct vfs_handle_struct *handle,
2431                                            struct files_struct *fsp,
2432                                            const DATA_BLOB old_cookie,
2433                                            TALLOC_CTX *mem_ctx,
2434                                            DATA_BLOB *new_cookie)
2435 {
2436         return vfs_default_durable_disconnect(fsp, old_cookie, mem_ctx,
2437                                               new_cookie);
2438 }
2439
2440 static NTSTATUS vfswrap_durable_reconnect(struct vfs_handle_struct *handle,
2441                                           struct smb_request *smb1req,
2442                                           struct smbXsrv_open *op,
2443                                           const DATA_BLOB old_cookie,
2444                                           TALLOC_CTX *mem_ctx,
2445                                           struct files_struct **fsp,
2446                                           DATA_BLOB *new_cookie)
2447 {
2448         return vfs_default_durable_reconnect(handle->conn, smb1req, op,
2449                                              old_cookie, mem_ctx,
2450                                              fsp, new_cookie);
2451 }
2452
2453 static struct vfs_fn_pointers vfs_default_fns = {
2454         /* Disk operations */
2455
2456         .connect_fn = vfswrap_connect,
2457         .disconnect_fn = vfswrap_disconnect,
2458         .disk_free_fn = vfswrap_disk_free,
2459         .get_quota_fn = vfswrap_get_quota,
2460         .set_quota_fn = vfswrap_set_quota,
2461         .get_shadow_copy_data_fn = vfswrap_get_shadow_copy_data,
2462         .statvfs_fn = vfswrap_statvfs,
2463         .fs_capabilities_fn = vfswrap_fs_capabilities,
2464         .get_dfs_referrals_fn = vfswrap_get_dfs_referrals,
2465
2466         /* Directory operations */
2467
2468         .opendir_fn = vfswrap_opendir,
2469         .fdopendir_fn = vfswrap_fdopendir,
2470         .readdir_fn = vfswrap_readdir,
2471         .seekdir_fn = vfswrap_seekdir,
2472         .telldir_fn = vfswrap_telldir,
2473         .rewind_dir_fn = vfswrap_rewinddir,
2474         .mkdir_fn = vfswrap_mkdir,
2475         .rmdir_fn = vfswrap_rmdir,
2476         .closedir_fn = vfswrap_closedir,
2477         .init_search_op_fn = vfswrap_init_search_op,
2478
2479         /* File operations */
2480
2481         .open_fn = vfswrap_open,
2482         .create_file_fn = vfswrap_create_file,
2483         .close_fn = vfswrap_close,
2484         .read_fn = vfswrap_read,
2485         .pread_fn = vfswrap_pread,
2486         .pread_send_fn = vfswrap_pread_send,
2487         .pread_recv_fn = vfswrap_asys_ssize_t_recv,
2488         .write_fn = vfswrap_write,
2489         .pwrite_fn = vfswrap_pwrite,
2490         .pwrite_send_fn = vfswrap_pwrite_send,
2491         .pwrite_recv_fn = vfswrap_asys_ssize_t_recv,
2492         .lseek_fn = vfswrap_lseek,
2493         .sendfile_fn = vfswrap_sendfile,
2494         .recvfile_fn = vfswrap_recvfile,
2495         .rename_fn = vfswrap_rename,
2496         .fsync_fn = vfswrap_fsync,
2497         .fsync_send_fn = vfswrap_fsync_send,
2498         .fsync_recv_fn = vfswrap_asys_int_recv,
2499         .stat_fn = vfswrap_stat,
2500         .fstat_fn = vfswrap_fstat,
2501         .lstat_fn = vfswrap_lstat,
2502         .get_alloc_size_fn = vfswrap_get_alloc_size,
2503         .unlink_fn = vfswrap_unlink,
2504         .chmod_fn = vfswrap_chmod,
2505         .fchmod_fn = vfswrap_fchmod,
2506         .chown_fn = vfswrap_chown,
2507         .fchown_fn = vfswrap_fchown,
2508         .lchown_fn = vfswrap_lchown,
2509         .chdir_fn = vfswrap_chdir,
2510         .getwd_fn = vfswrap_getwd,
2511         .ntimes_fn = vfswrap_ntimes,
2512         .ftruncate_fn = vfswrap_ftruncate,
2513         .fallocate_fn = vfswrap_fallocate,
2514         .lock_fn = vfswrap_lock,
2515         .kernel_flock_fn = vfswrap_kernel_flock,
2516         .linux_setlease_fn = vfswrap_linux_setlease,
2517         .getlock_fn = vfswrap_getlock,
2518         .symlink_fn = vfswrap_symlink,
2519         .readlink_fn = vfswrap_readlink,
2520         .link_fn = vfswrap_link,
2521         .mknod_fn = vfswrap_mknod,
2522         .realpath_fn = vfswrap_realpath,
2523         .notify_watch_fn = vfswrap_notify_watch,
2524         .chflags_fn = vfswrap_chflags,
2525         .file_id_create_fn = vfswrap_file_id_create,
2526         .streaminfo_fn = vfswrap_streaminfo,
2527         .get_real_filename_fn = vfswrap_get_real_filename,
2528         .connectpath_fn = vfswrap_connectpath,
2529         .brl_lock_windows_fn = vfswrap_brl_lock_windows,
2530         .brl_unlock_windows_fn = vfswrap_brl_unlock_windows,
2531         .brl_cancel_windows_fn = vfswrap_brl_cancel_windows,
2532         .strict_lock_fn = vfswrap_strict_lock,
2533         .strict_unlock_fn = vfswrap_strict_unlock,
2534         .translate_name_fn = vfswrap_translate_name,
2535         .fsctl_fn = vfswrap_fsctl,
2536         .copy_chunk_send_fn = vfswrap_copy_chunk_send,
2537         .copy_chunk_recv_fn = vfswrap_copy_chunk_recv,
2538
2539         /* NT ACL operations. */
2540
2541         .fget_nt_acl_fn = vfswrap_fget_nt_acl,
2542         .get_nt_acl_fn = vfswrap_get_nt_acl,
2543         .fset_nt_acl_fn = vfswrap_fset_nt_acl,
2544         .audit_file_fn = vfswrap_audit_file,
2545
2546         /* POSIX ACL operations. */
2547
2548         .chmod_acl_fn = vfswrap_chmod_acl,
2549         .fchmod_acl_fn = vfswrap_fchmod_acl,
2550
2551         .sys_acl_get_file_fn = vfswrap_sys_acl_get_file,
2552         .sys_acl_get_fd_fn = vfswrap_sys_acl_get_fd,
2553         .sys_acl_blob_get_file_fn = posix_sys_acl_blob_get_file,
2554         .sys_acl_blob_get_fd_fn = posix_sys_acl_blob_get_fd,
2555         .sys_acl_set_file_fn = vfswrap_sys_acl_set_file,
2556         .sys_acl_set_fd_fn = vfswrap_sys_acl_set_fd,
2557         .sys_acl_delete_def_file_fn = vfswrap_sys_acl_delete_def_file,
2558
2559         /* EA operations. */
2560         .getxattr_fn = vfswrap_getxattr,
2561         .fgetxattr_fn = vfswrap_fgetxattr,
2562         .listxattr_fn = vfswrap_listxattr,
2563         .flistxattr_fn = vfswrap_flistxattr,
2564         .removexattr_fn = vfswrap_removexattr,
2565         .fremovexattr_fn = vfswrap_fremovexattr,
2566         .setxattr_fn = vfswrap_setxattr,
2567         .fsetxattr_fn = vfswrap_fsetxattr,
2568
2569         /* aio operations */
2570         .aio_force_fn = vfswrap_aio_force,
2571
2572         /* offline operations */
2573         .is_offline_fn = vfswrap_is_offline,
2574         .set_offline_fn = vfswrap_set_offline,
2575
2576         /* durable handle operations */
2577         .durable_cookie_fn = vfswrap_durable_cookie,
2578         .durable_disconnect_fn = vfswrap_durable_disconnect,
2579         .durable_reconnect_fn = vfswrap_durable_reconnect,
2580 };
2581
2582 NTSTATUS vfs_default_init(void);
2583 NTSTATUS vfs_default_init(void)
2584 {
2585         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
2586                                 DEFAULT_VFS_MODULE_NAME, &vfs_default_fns);
2587 }
2588
2589