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/util/tevent_ntstatus.h"
  34 #include "lib/util/sys_rw.h"
  35 #include "lib/pthreadpool/pthreadpool_tevent.h"
  36 #include "librpc/gen_ndr/ndr_ioctl.h"
  37 #include "offload_token.h"
  38
  39 #undef DBGC_CLASS
  40 #define DBGC_CLASS DBGC_VFS
  41
  42 /* Check for NULL pointer parameters in vfswrap_* functions */
  43
  44 /* We don't want to have NULL function pointers lying around.  Someone
  45    is sure to try and execute them.  These stubs are used to prevent
  46    this possibility. */
  47
  48 static int vfswrap_connect(vfs_handle_struct *handle, const char *service, const char *user)
  49 {
  50     return 0;    /* Return >= 0 for success */
  51 }
  52
  53 static void vfswrap_disconnect(vfs_handle_struct *handle)
  54 {
  55 }
  56
  57 /* Disk operations */
  58
  59 static uint64_t vfswrap_disk_free(vfs_handle_struct *handle,
  60                                 const struct smb_filename *smb_fname,
  61                                 uint64_t *bsize,
  62                                 uint64_t *dfree,
  63                                 uint64_t *dsize)
  64 {
  65         if (sys_fsusage(smb_fname->base_name, dfree, dsize) != 0) {
  66                 return (uint64_t)-1;
  67         }
  68
  69         *bsize = 512;
  70         return *dfree / 2;
  71 }
  72
  73 static int vfswrap_get_quota(struct vfs_handle_struct *handle,
  74                                 const struct smb_filename *smb_fname,
  75                                 enum SMB_QUOTA_TYPE qtype,
  76                                 unid_t id,
  77                                 SMB_DISK_QUOTA *qt)
  78 {
  79 #ifdef HAVE_SYS_QUOTAS
  80         int result;
  81
  82         START_PROFILE(syscall_get_quota);
  83         result = sys_get_quota(smb_fname->base_name, qtype, id, qt);
  84         END_PROFILE(syscall_get_quota);
  85         return result;
  86 #else
  87         errno = ENOSYS;
  88         return -1;
  89 #endif
  90 }
  91
  92 static int vfswrap_set_quota(struct vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt)
  93 {
  94 #ifdef HAVE_SYS_QUOTAS
  95         int result;
  96
  97         START_PROFILE(syscall_set_quota);
  98         result = sys_set_quota(handle->conn->connectpath, qtype, id, qt);
  99         END_PROFILE(syscall_set_quota);
 100         return result;
 101 #else
 102         errno = ENOSYS;
 103         return -1;
 104 #endif
 105 }
 106
 107 static int vfswrap_get_shadow_copy_data(struct vfs_handle_struct *handle,
 108                                         struct files_struct *fsp,
 109                                         struct shadow_copy_data *shadow_copy_data,
 110                                         bool labels)
 111 {
 112         errno = ENOSYS;
 113         return -1;  /* Not implemented. */
 114 }
 115
 116 static int vfswrap_statvfs(struct vfs_handle_struct *handle,
 117                                 const struct smb_filename *smb_fname,
 118                                 vfs_statvfs_struct *statbuf)
 119 {
 120         return sys_statvfs(smb_fname->base_name, statbuf);
 121 }
 122
 123 static uint32_t vfswrap_fs_capabilities(struct vfs_handle_struct *handle,
 124                 enum timestamp_set_resolution *p_ts_res)
 125 {
 126         connection_struct *conn = handle->conn;
 127         uint32_t caps = FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
 128         struct smb_filename *smb_fname_cpath = NULL;
 129         struct vfs_statvfs_struct statbuf;
 130         int ret;
 131
 132         smb_fname_cpath = synthetic_smb_fname(talloc_tos(), conn->connectpath,
 133                                               NULL, NULL, 0);
 134         if (smb_fname_cpath == NULL) {
 135                 return caps;
 136         }
 137
 138         ZERO_STRUCT(statbuf);
 139         ret = SMB_VFS_STATVFS(conn, smb_fname_cpath, &statbuf);
 140         if (ret == 0) {
 141                 caps = statbuf.FsCapabilities;
 142         }
 143
 144         *p_ts_res = TIMESTAMP_SET_SECONDS;
 145
 146         /* Work out what timestamp resolution we can
 147          * use when setting a timestamp. */
 148
 149         ret = SMB_VFS_STAT(conn, smb_fname_cpath);
 150         if (ret == -1) {
 151                 TALLOC_FREE(smb_fname_cpath);
 152                 return caps;
 153         }
 154
 155         if (smb_fname_cpath->st.st_ex_mtime.tv_nsec ||
 156                         smb_fname_cpath->st.st_ex_atime.tv_nsec ||
 157                         smb_fname_cpath->st.st_ex_ctime.tv_nsec) {
 158                 /* If any of the normal UNIX directory timestamps
 159                  * have a non-zero tv_nsec component assume
 160                  * we might be able to set sub-second timestamps.
 161                  * See what filetime set primitives we have.
 162                  */
 163 #if defined(HAVE_UTIMENSAT)
 164                 *p_ts_res = TIMESTAMP_SET_NT_OR_BETTER;
 165 #elif defined(HAVE_UTIMES)
 166                 /* utimes allows msec timestamps to be set. */
 167                 *p_ts_res = TIMESTAMP_SET_MSEC;
 168 #elif defined(HAVE_UTIME)
 169                 /* utime only allows sec timestamps to be set. */
 170                 *p_ts_res = TIMESTAMP_SET_SECONDS;
 171 #endif
 172
 173                 DEBUG(10,("vfswrap_fs_capabilities: timestamp "
 174                         "resolution of %s "
 175                         "available on share %s, directory %s\n",
 176                         *p_ts_res == TIMESTAMP_SET_MSEC ? "msec" : "sec",
 177                         lp_servicename(talloc_tos(), conn->params->service),
 178                         conn->connectpath ));
 179         }
 180         TALLOC_FREE(smb_fname_cpath);
 181         return caps;
 182 }
 183
 184 static NTSTATUS vfswrap_get_dfs_referrals(struct vfs_handle_struct *handle,
 185                                           struct dfs_GetDFSReferral *r)
 186 {
 187         struct junction_map *junction = NULL;
 188         int consumedcnt = 0;
 189         bool self_referral = false;
 190         char *pathnamep = NULL;
 191         char *local_dfs_path = NULL;
 192         NTSTATUS status;
 193         int i;
 194         uint16_t max_referral_level = r->in.req.max_referral_level;
 195
 196         if (DEBUGLVL(10)) {
 197                 NDR_PRINT_IN_DEBUG(dfs_GetDFSReferral, r);
 198         }
 199
 200         /* get the junction entry */
 201         if (r->in.req.servername == NULL) {
 202                 return NT_STATUS_NOT_FOUND;
 203         }
 204
 205         /*
 206          * Trim pathname sent by client so it begins with only one backslash.
 207          * Two backslashes confuse some dfs clients
 208          */
 209
 210         local_dfs_path = talloc_strdup(r, r->in.req.servername);
 211         if (local_dfs_path == NULL) {
 212                 return NT_STATUS_NO_MEMORY;
 213         }
 214         pathnamep = local_dfs_path;
 215         while (IS_DIRECTORY_SEP(pathnamep[0]) &&
 216                IS_DIRECTORY_SEP(pathnamep[1])) {
 217                 pathnamep++;
 218         }
 219
 220         junction = talloc_zero(r, struct junction_map);
 221         if (junction == NULL) {
 222                 return NT_STATUS_NO_MEMORY;
 223         }
 224
 225         /* The following call can change cwd. */
 226         status = get_referred_path(r, pathnamep,
 227                                    handle->conn->sconn->remote_address,
 228                                    handle->conn->sconn->local_address,
 229                                    !handle->conn->sconn->using_smb2,
 230                                    junction, &consumedcnt, &self_referral);
 231         if (!NT_STATUS_IS_OK(status)) {
 232                 struct smb_filename connectpath_fname = {
 233                         .base_name = handle->conn->connectpath
 234                 };
 235                 vfs_ChDir(handle->conn, &connectpath_fname);
 236                 return status;
 237         }
 238         {
 239                 struct smb_filename connectpath_fname = {
 240                         .base_name = handle->conn->connectpath
 241                 };
 242                 vfs_ChDir(handle->conn, &connectpath_fname);
 243         }
 244
 245         if (!self_referral) {
 246                 pathnamep[consumedcnt] = '\0';
 247
 248                 if (DEBUGLVL(3)) {
 249                         dbgtext("Path %s to alternate path(s):",
 250                                 pathnamep);
 251                         for (i=0; i < junction->referral_count; i++) {
 252                                 dbgtext(" %s",
 253                                 junction->referral_list[i].alternate_path);
 254                         }
 255                         dbgtext(".\n");
 256                 }
 257         }
 258
 259         if (r->in.req.max_referral_level <= 2) {
 260                 max_referral_level = 2;
 261         }
 262         if (r->in.req.max_referral_level >= 3) {
 263                 max_referral_level = 3;
 264         }
 265
 266         r->out.resp = talloc_zero(r, struct dfs_referral_resp);
 267         if (r->out.resp == NULL) {
 268                 return NT_STATUS_NO_MEMORY;
 269         }
 270
 271         r->out.resp->path_consumed = strlen_m(pathnamep) * 2;
 272         r->out.resp->nb_referrals = junction->referral_count;
 273
 274         r->out.resp->header_flags = DFS_HEADER_FLAG_STORAGE_SVR;
 275         if (self_referral) {
 276                 r->out.resp->header_flags |= DFS_HEADER_FLAG_REFERAL_SVR;
 277         }
 278
 279         r->out.resp->referral_entries = talloc_zero_array(r,
 280                                 struct dfs_referral_type,
 281                                 r->out.resp->nb_referrals);
 282         if (r->out.resp->referral_entries == NULL) {
 283                 return NT_STATUS_NO_MEMORY;
 284         }
 285
 286         switch (max_referral_level) {
 287         case 2:
 288                 for(i=0; i < junction->referral_count; i++) {
 289                         struct referral *ref = &junction->referral_list[i];
 290                         TALLOC_CTX *mem_ctx = r->out.resp->referral_entries;
 291                         struct dfs_referral_type *t =
 292                                 &r->out.resp->referral_entries[i];
 293                         struct dfs_referral_v2 *v2 = &t->referral.v2;
 294
 295                         t->version = 2;
 296                         v2->size = VERSION2_REFERRAL_SIZE;
 297                         if (self_referral) {
 298                                 v2->server_type = DFS_SERVER_ROOT;
 299                         } else {
 300                                 v2->server_type = DFS_SERVER_NON_ROOT;
 301                         }
 302                         v2->entry_flags = 0;
 303                         v2->proximity = ref->proximity;
 304                         v2->ttl = ref->ttl;
 305                         v2->DFS_path = talloc_strdup(mem_ctx, pathnamep);
 306                         if (v2->DFS_path == NULL) {
 307                                 return NT_STATUS_NO_MEMORY;
 308                         }
 309                         v2->DFS_alt_path = talloc_strdup(mem_ctx, pathnamep);
 310                         if (v2->DFS_alt_path == NULL) {
 311                                 return NT_STATUS_NO_MEMORY;
 312                         }
 313                         v2->netw_address = talloc_strdup(mem_ctx,
 314                                                          ref->alternate_path);
 315                         if (v2->netw_address == NULL) {
 316                                 return NT_STATUS_NO_MEMORY;
 317                         }
 318                 }
 319
 320                 break;
 321         case 3:
 322                 for(i=0; i < junction->referral_count; i++) {
 323                         struct referral *ref = &junction->referral_list[i];
 324                         TALLOC_CTX *mem_ctx = r->out.resp->referral_entries;
 325                         struct dfs_referral_type *t =
 326                                 &r->out.resp->referral_entries[i];
 327                         struct dfs_referral_v3 *v3 = &t->referral.v3;
 328                         struct dfs_normal_referral *r1 = &v3->referrals.r1;
 329
 330                         t->version = 3;
 331                         v3->size = VERSION3_REFERRAL_SIZE;
 332                         if (self_referral) {
 333                                 v3->server_type = DFS_SERVER_ROOT;
 334                         } else {
 335                                 v3->server_type = DFS_SERVER_NON_ROOT;
 336                         }
 337                         v3->entry_flags = 0;
 338                         v3->ttl = ref->ttl;
 339                         r1->DFS_path = talloc_strdup(mem_ctx, pathnamep);
 340                         if (r1->DFS_path == NULL) {
 341                                 return NT_STATUS_NO_MEMORY;
 342                         }
 343                         r1->DFS_alt_path = talloc_strdup(mem_ctx, pathnamep);
 344                         if (r1->DFS_alt_path == NULL) {
 345                                 return NT_STATUS_NO_MEMORY;
 346                         }
 347                         r1->netw_address = talloc_strdup(mem_ctx,
 348                                                          ref->alternate_path);
 349                         if (r1->netw_address == NULL) {
 350                                 return NT_STATUS_NO_MEMORY;
 351                         }
 352                 }
 353                 break;
 354         default:
 355                 DEBUG(0,("Invalid dfs referral version: %d\n",
 356                         max_referral_level));
 357                 return NT_STATUS_INVALID_LEVEL;
 358         }
 359
 360         if (DEBUGLVL(10)) {
 361                 NDR_PRINT_OUT_DEBUG(dfs_GetDFSReferral, r);
 362         }
 363
 364         return NT_STATUS_OK;
 365 }
 366
 367 static NTSTATUS vfswrap_snap_check_path(struct vfs_handle_struct *handle,
 368                                         TALLOC_CTX *mem_ctx,
 369                                         const char *service_path,
 370                                         char **base_volume)
 371 {
 372         return NT_STATUS_NOT_SUPPORTED;
 373 }
 374
 375 static NTSTATUS vfswrap_snap_create(struct vfs_handle_struct *handle,
 376                                     TALLOC_CTX *mem_ctx,
 377                                     const char *base_volume,
 378                                     time_t *tstamp,
 379                                     bool rw,
 380                                     char **base_path,
 381                                     char **snap_path)
 382 {
 383         return NT_STATUS_NOT_SUPPORTED;
 384 }
 385
 386 static NTSTATUS vfswrap_snap_delete(struct vfs_handle_struct *handle,
 387                                     TALLOC_CTX *mem_ctx,
 388                                     char *base_path,
 389                                     char *snap_path)
 390 {
 391         return NT_STATUS_NOT_SUPPORTED;
 392 }
 393
 394 /* Directory operations */
 395
 396 static DIR *vfswrap_opendir(vfs_handle_struct *handle,
 397                                 const struct smb_filename *smb_fname,
 398                                 const char *mask,
 399                                 uint32_t attr)
 400 {
 401         DIR *result;
 402
 403         START_PROFILE(syscall_opendir);
 404         result = opendir(smb_fname->base_name);
 405         END_PROFILE(syscall_opendir);
 406         return result;
 407 }
 408
 409 static DIR *vfswrap_fdopendir(vfs_handle_struct *handle,
 410                         files_struct *fsp,
 411                         const char *mask,
 412                         uint32_t attr)
 413 {
 414         DIR *result;
 415
 416         START_PROFILE(syscall_fdopendir);
 417         result = sys_fdopendir(fsp->fh->fd);
 418         END_PROFILE(syscall_fdopendir);
 419         return result;
 420 }
 421
 422
 423 static struct dirent *vfswrap_readdir(vfs_handle_struct *handle,
 424                                           DIR *dirp,
 425                                           SMB_STRUCT_STAT *sbuf)
 426 {
 427         struct dirent *result;
 428
 429         START_PROFILE(syscall_readdir);
 430         result = readdir(dirp);
 431         END_PROFILE(syscall_readdir);
 432         if (sbuf) {
 433                 /* Default Posix readdir() does not give us stat info.
 434                  * Set to invalid to indicate we didn't return this info. */
 435                 SET_STAT_INVALID(*sbuf);
 436 #if defined(HAVE_DIRFD) && defined(HAVE_FSTATAT)
 437                 if (result != NULL) {
 438                         /* See if we can efficiently return this. */
 439                         struct stat st;
 440                         int flags = AT_SYMLINK_NOFOLLOW;
 441                         int ret = fstatat(dirfd(dirp),
 442                                         result->d_name,
 443                                         &st,
 444                                         flags);
 445                         /*
 446                          * As this is an optimization,
 447                          * ignore it if we stat'ed a
 448                          * symlink. Make the caller
 449                          * do it again as we don't
 450                          * know if they wanted the link
 451                          * info, or its target info.
 452                          */
 453                         if ((ret == 0) && (!S_ISLNK(st.st_mode))) {
 454                                 init_stat_ex_from_stat(sbuf,
 455                                         &st,
 456                                         lp_fake_directory_create_times(
 457                                                 SNUM(handle->conn)));
 458                         }
 459                 }
 460 #endif
 461         }
 462         return result;
 463 }
 464
 465 static NTSTATUS vfswrap_readdir_attr(struct vfs_handle_struct *handle,
 466                                      const struct smb_filename *fname,
 467                                      TALLOC_CTX *mem_ctx,
 468                                      struct readdir_attr_data **attr_data)
 469 {
 470         return NT_STATUS_NOT_SUPPORTED;
 471 }
 472
 473 static void vfswrap_seekdir(vfs_handle_struct *handle, DIR *dirp, long offset)
 474 {
 475         START_PROFILE(syscall_seekdir);
 476         seekdir(dirp, offset);
 477         END_PROFILE(syscall_seekdir);
 478 }
 479
 480 static long vfswrap_telldir(vfs_handle_struct *handle, DIR *dirp)
 481 {
 482         long result;
 483         START_PROFILE(syscall_telldir);
 484         result = telldir(dirp);
 485         END_PROFILE(syscall_telldir);
 486         return result;
 487 }
 488
 489 static void vfswrap_rewinddir(vfs_handle_struct *handle, DIR *dirp)
 490 {
 491         START_PROFILE(syscall_rewinddir);
 492         rewinddir(dirp);
 493         END_PROFILE(syscall_rewinddir);
 494 }
 495
 496 static int vfswrap_mkdir(vfs_handle_struct *handle,
 497                         const struct smb_filename *smb_fname,
 498                         mode_t mode)
 499 {
 500         int result;
 501         const char *path = smb_fname->base_name;
 502         char *parent = NULL;
 503
 504         START_PROFILE(syscall_mkdir);
 505
 506         if (lp_inherit_acls(SNUM(handle->conn))
 507             && parent_dirname(talloc_tos(), path, &parent, NULL)
 508             && directory_has_default_acl(handle->conn, parent)) {
 509                 mode = (0777 & lp_directory_mask(SNUM(handle->conn)));
 510         }
 511
 512         TALLOC_FREE(parent);
 513
 514         result = mkdir(path, mode);
 515
 516         END_PROFILE(syscall_mkdir);
 517         return result;
 518 }
 519
 520 static int vfswrap_rmdir(vfs_handle_struct *handle,
 521                         const struct smb_filename *smb_fname)
 522 {
 523         int result;
 524
 525         START_PROFILE(syscall_rmdir);
 526         result = rmdir(smb_fname->base_name);
 527         END_PROFILE(syscall_rmdir);
 528         return result;
 529 }
 530
 531 static int vfswrap_closedir(vfs_handle_struct *handle, DIR *dirp)
 532 {
 533         int result;
 534
 535         START_PROFILE(syscall_closedir);
 536         result = closedir(dirp);
 537         END_PROFILE(syscall_closedir);
 538         return result;
 539 }
 540
 541 /* File operations */
 542
 543 static int vfswrap_open(vfs_handle_struct *handle,
 544                         struct smb_filename *smb_fname,
 545                         files_struct *fsp, int flags, mode_t mode)
 546 {
 547         int result = -1;
 548
 549         START_PROFILE(syscall_open);
 550
 551         if (smb_fname->stream_name) {
 552                 errno = ENOENT;
 553                 goto out;
 554         }
 555
 556         result = open(smb_fname->base_name, flags, mode);
 557  out:
 558         END_PROFILE(syscall_open);
 559         return result;
 560 }
 561
 562 static NTSTATUS vfswrap_create_file(vfs_handle_struct *handle,
 563                                     struct smb_request *req,
 564                                     uint16_t root_dir_fid,
 565                                     struct smb_filename *smb_fname,
 566                                     uint32_t access_mask,
 567                                     uint32_t share_access,
 568                                     uint32_t create_disposition,
 569                                     uint32_t create_options,
 570                                     uint32_t file_attributes,
 571                                     uint32_t oplock_request,
 572                                     struct smb2_lease *lease,
 573                                     uint64_t allocation_size,
 574                                     uint32_t private_flags,
 575                                     struct security_descriptor *sd,
 576                                     struct ea_list *ea_list,
 577                                     files_struct **result,
 578                                     int *pinfo,
 579                                     const struct smb2_create_blobs *in_context_blobs,
 580                                     struct smb2_create_blobs *out_context_blobs)
 581 {
 582         return create_file_default(handle->conn, req, root_dir_fid, smb_fname,
 583                                    access_mask, share_access,
 584                                    create_disposition, create_options,
 585                                    file_attributes, oplock_request, lease,
 586                                    allocation_size, private_flags,
 587                                    sd, ea_list, result,
 588                                    pinfo, in_context_blobs, out_context_blobs);
 589 }
 590
 591 static int vfswrap_close(vfs_handle_struct *handle, files_struct *fsp)
 592 {
 593         int result;
 594
 595         START_PROFILE(syscall_close);
 596         result = fd_close_posix(fsp);
 597         END_PROFILE(syscall_close);
 598         return result;
 599 }
 600
 601 static ssize_t vfswrap_pread(vfs_handle_struct *handle, files_struct *fsp, void *data,
 602                         size_t n, off_t offset)
 603 {
 604         ssize_t result;
 605
 606 #if defined(HAVE_PREAD) || defined(HAVE_PREAD64)
 607         START_PROFILE_BYTES(syscall_pread, n);
 608         result = sys_pread(fsp->fh->fd, data, n, offset);
 609         END_PROFILE_BYTES(syscall_pread);
 610
 611         if (result == -1 && errno == ESPIPE) {
 612                 /* Maintain the fiction that pipes can be seeked (sought?) on. */
 613                 result = sys_read(fsp->fh->fd, data, n);
 614                 fsp->fh->pos = 0;
 615         }
 616
 617 #else /* HAVE_PREAD */
 618         errno = ENOSYS;
 619         result = -1;
 620 #endif /* HAVE_PREAD */
 621
 622         return result;
 623 }
 624
 625 static ssize_t vfswrap_pwrite(vfs_handle_struct *handle, files_struct *fsp, const void *data,
 626                         size_t n, off_t offset)
 627 {
 628         ssize_t result;
 629
 630 #if defined(HAVE_PWRITE) || defined(HAVE_PRWITE64)
 631         START_PROFILE_BYTES(syscall_pwrite, n);
 632         result = sys_pwrite(fsp->fh->fd, data, n, offset);
 633         END_PROFILE_BYTES(syscall_pwrite);
 634
 635         if (result == -1 && errno == ESPIPE) {
 636                 /* Maintain the fiction that pipes can be sought on. */
 637                 result = sys_write(fsp->fh->fd, data, n);
 638         }
 639
 640 #else /* HAVE_PWRITE */
 641         errno = ENOSYS;
 642         result = -1;
 643 #endif /* HAVE_PWRITE */
 644
 645         return result;
 646 }
 647
 648 struct vfswrap_pread_state {
 649         ssize_t ret;
 650         int fd;
 651         void *buf;
 652         size_t count;
 653         off_t offset;
 654
 655         struct vfs_aio_state vfs_aio_state;
 656         SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
 657 };
 658
 659 static void vfs_pread_do(void *private_data);
 660 static void vfs_pread_done(struct tevent_req *subreq);
 661 static int vfs_pread_state_destructor(struct vfswrap_pread_state *state);
 662
 663 static struct tevent_req *vfswrap_pread_send(struct vfs_handle_struct *handle,
 664                                              TALLOC_CTX *mem_ctx,
 665                                              struct tevent_context *ev,
 666                                              struct files_struct *fsp,
 667                                              void *data,
 668                                              size_t n, off_t offset)
 669 {
 670         struct tevent_req *req, *subreq;
 671         struct vfswrap_pread_state *state;
 672
 673         req = tevent_req_create(mem_ctx, &state, struct vfswrap_pread_state);
 674         if (req == NULL) {
 675                 return NULL;
 676         }
 677
 678         state->ret = -1;
 679         state->fd = fsp->fh->fd;
 680         state->buf = data;
 681         state->count = n;
 682         state->offset = offset;
 683
 684         SMBPROFILE_BYTES_ASYNC_START(syscall_asys_pread, profile_p,
 685                                      state->profile_bytes, n);
 686         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
 687
 688         subreq = pthreadpool_tevent_job_send(
 689                 state, ev, handle->conn->sconn->pool,
 690                 vfs_pread_do, state);
 691         if (tevent_req_nomem(subreq, req)) {
 692                 return tevent_req_post(req, ev);
 693         }
 694         tevent_req_set_callback(subreq, vfs_pread_done, req);
 695
 696         talloc_set_destructor(state, vfs_pread_state_destructor);
 697
 698         return req;
 699 }
 700
 701 static void vfs_pread_do(void *private_data)
 702 {
 703         struct vfswrap_pread_state *state = talloc_get_type_abort(
 704                 private_data, struct vfswrap_pread_state);
 705         struct timespec start_time;
 706         struct timespec end_time;
 707
 708         SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
 709
 710         PROFILE_TIMESTAMP(&start_time);
 711
 712         do {
 713                 state->ret = pread(state->fd, state->buf, state->count,
 714                                    state->offset);
 715         } while ((state->ret == -1) && (errno == EINTR));
 716
 717         if (state->ret == -1) {
 718                 state->vfs_aio_state.error = errno;
 719         }
 720
 721         PROFILE_TIMESTAMP(&end_time);
 722
 723         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
 724
 725         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
 726 }
 727
 728 static int vfs_pread_state_destructor(struct vfswrap_pread_state *state)
 729 {
 730         return -1;
 731 }
 732
 733 static void vfs_pread_done(struct tevent_req *subreq)
 734 {
 735         struct tevent_req *req = tevent_req_callback_data(
 736                 subreq, struct tevent_req);
 737         struct vfswrap_pread_state *state = tevent_req_data(
 738                 req, struct vfswrap_pread_state);
 739         int ret;
 740
 741         ret = pthreadpool_tevent_job_recv(subreq);
 742         TALLOC_FREE(subreq);
 743         SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
 744         talloc_set_destructor(state, NULL);
 745         if (tevent_req_error(req, ret)) {
 746                 return;
 747         }
 748
 749         tevent_req_done(req);
 750 }
 751
 752 static ssize_t vfswrap_pread_recv(struct tevent_req *req,
 753                                   struct vfs_aio_state *vfs_aio_state)
 754 {
 755         struct vfswrap_pread_state *state = tevent_req_data(
 756                 req, struct vfswrap_pread_state);
 757
 758         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
 759                 return -1;
 760         }
 761
 762         *vfs_aio_state = state->vfs_aio_state;
 763         return state->ret;
 764 }
 765
 766 struct vfswrap_pwrite_state {
 767         ssize_t ret;
 768         int fd;
 769         const void *buf;
 770         size_t count;
 771         off_t offset;
 772
 773         struct vfs_aio_state vfs_aio_state;
 774         SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
 775 };
 776
 777 static void vfs_pwrite_do(void *private_data);
 778 static void vfs_pwrite_done(struct tevent_req *subreq);
 779 static int vfs_pwrite_state_destructor(struct vfswrap_pwrite_state *state);
 780
 781 static struct tevent_req *vfswrap_pwrite_send(struct vfs_handle_struct *handle,
 782                                               TALLOC_CTX *mem_ctx,
 783                                               struct tevent_context *ev,
 784                                               struct files_struct *fsp,
 785                                               const void *data,
 786                                               size_t n, off_t offset)
 787 {
 788         struct tevent_req *req, *subreq;
 789         struct vfswrap_pwrite_state *state;
 790
 791         req = tevent_req_create(mem_ctx, &state, struct vfswrap_pwrite_state);
 792         if (req == NULL) {
 793                 return NULL;
 794         }
 795
 796         state->ret = -1;
 797         state->fd = fsp->fh->fd;
 798         state->buf = data;
 799         state->count = n;
 800         state->offset = offset;
 801
 802         SMBPROFILE_BYTES_ASYNC_START(syscall_asys_pwrite, profile_p,
 803                                      state->profile_bytes, n);
 804         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
 805
 806         subreq = pthreadpool_tevent_job_send(
 807                 state, ev, handle->conn->sconn->pool,
 808                 vfs_pwrite_do, state);
 809         if (tevent_req_nomem(subreq, req)) {
 810                 return tevent_req_post(req, ev);
 811         }
 812         tevent_req_set_callback(subreq, vfs_pwrite_done, req);
 813
 814         talloc_set_destructor(state, vfs_pwrite_state_destructor);
 815
 816         return req;
 817 }
 818
 819 static void vfs_pwrite_do(void *private_data)
 820 {
 821         struct vfswrap_pwrite_state *state = talloc_get_type_abort(
 822                 private_data, struct vfswrap_pwrite_state);
 823         struct timespec start_time;
 824         struct timespec end_time;
 825
 826         SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
 827
 828         PROFILE_TIMESTAMP(&start_time);
 829
 830         do {
 831                 state->ret = pwrite(state->fd, state->buf, state->count,
 832                                    state->offset);
 833         } while ((state->ret == -1) && (errno == EINTR));
 834
 835         if (state->ret == -1) {
 836                 state->vfs_aio_state.error = errno;
 837         }
 838
 839         PROFILE_TIMESTAMP(&end_time);
 840
 841         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
 842
 843         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
 844 }
 845
 846 static int vfs_pwrite_state_destructor(struct vfswrap_pwrite_state *state)
 847 {
 848         return -1;
 849 }
 850
 851 static void vfs_pwrite_done(struct tevent_req *subreq)
 852 {
 853         struct tevent_req *req = tevent_req_callback_data(
 854                 subreq, struct tevent_req);
 855         struct vfswrap_pwrite_state *state = tevent_req_data(
 856                 req, struct vfswrap_pwrite_state);
 857         int ret;
 858
 859         ret = pthreadpool_tevent_job_recv(subreq);
 860         TALLOC_FREE(subreq);
 861         SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
 862         talloc_set_destructor(state, NULL);
 863         if (tevent_req_error(req, ret)) {
 864                 return;
 865         }
 866
 867         tevent_req_done(req);
 868 }
 869
 870 static ssize_t vfswrap_pwrite_recv(struct tevent_req *req,
 871                                    struct vfs_aio_state *vfs_aio_state)
 872 {
 873         struct vfswrap_pwrite_state *state = tevent_req_data(
 874                 req, struct vfswrap_pwrite_state);
 875
 876         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
 877                 return -1;
 878         }
 879
 880         *vfs_aio_state = state->vfs_aio_state;
 881         return state->ret;
 882 }
 883
 884 struct vfswrap_fsync_state {
 885         ssize_t ret;
 886         int fd;
 887
 888         struct vfs_aio_state vfs_aio_state;
 889         SMBPROFILE_BASIC_ASYNC_STATE(profile_basic);
 890 };
 891
 892 static void vfs_fsync_do(void *private_data);
 893 static void vfs_fsync_done(struct tevent_req *subreq);
 894 static int vfs_fsync_state_destructor(struct vfswrap_fsync_state *state);
 895
 896 static struct tevent_req *vfswrap_fsync_send(struct vfs_handle_struct *handle,
 897                                              TALLOC_CTX *mem_ctx,
 898                                              struct tevent_context *ev,
 899                                              struct files_struct *fsp)
 900 {
 901         struct tevent_req *req, *subreq;
 902         struct vfswrap_fsync_state *state;
 903
 904         req = tevent_req_create(mem_ctx, &state, struct vfswrap_fsync_state);
 905         if (req == NULL) {
 906                 return NULL;
 907         }
 908
 909         state->ret = -1;
 910         state->fd = fsp->fh->fd;
 911
 912         SMBPROFILE_BASIC_ASYNC_START(syscall_asys_fsync, profile_p,
 913                                      state->profile_basic);
 914
 915         subreq = pthreadpool_tevent_job_send(
 916                 state, ev, handle->conn->sconn->pool, vfs_fsync_do, state);
 917         if (tevent_req_nomem(subreq, req)) {
 918                 return tevent_req_post(req, ev);
 919         }
 920         tevent_req_set_callback(subreq, vfs_fsync_done, req);
 921
 922         talloc_set_destructor(state, vfs_fsync_state_destructor);
 923
 924         return req;
 925 }
 926
 927 static void vfs_fsync_do(void *private_data)
 928 {
 929         struct vfswrap_fsync_state *state = talloc_get_type_abort(
 930                 private_data, struct vfswrap_fsync_state);
 931         struct timespec start_time;
 932         struct timespec end_time;
 933
 934         PROFILE_TIMESTAMP(&start_time);
 935
 936         do {
 937                 state->ret = fsync(state->fd);
 938         } while ((state->ret == -1) && (errno == EINTR));
 939
 940         if (state->ret == -1) {
 941                 state->vfs_aio_state.error = errno;
 942         }
 943
 944         PROFILE_TIMESTAMP(&end_time);
 945
 946         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
 947 }
 948
 949 static int vfs_fsync_state_destructor(struct vfswrap_fsync_state *state)
 950 {
 951         return -1;
 952 }
 953
 954 static void vfs_fsync_done(struct tevent_req *subreq)
 955 {
 956         struct tevent_req *req = tevent_req_callback_data(
 957                 subreq, struct tevent_req);
 958         struct vfswrap_fsync_state *state = tevent_req_data(
 959                 req, struct vfswrap_fsync_state);
 960         int ret;
 961
 962         ret = pthreadpool_tevent_job_recv(subreq);
 963         TALLOC_FREE(subreq);
 964         SMBPROFILE_BASIC_ASYNC_END(state->profile_basic);
 965         talloc_set_destructor(state, NULL);
 966         if (tevent_req_error(req, ret)) {
 967                 return;
 968         }
 969
 970         tevent_req_done(req);
 971 }
 972
 973 static int vfswrap_fsync_recv(struct tevent_req *req,
 974                               struct vfs_aio_state *vfs_aio_state)
 975 {
 976         struct vfswrap_fsync_state *state = tevent_req_data(
 977                 req, struct vfswrap_fsync_state);
 978
 979         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
 980                 return -1;
 981         }
 982
 983         *vfs_aio_state = state->vfs_aio_state;
 984         return state->ret;
 985 }
 986
 987 static off_t vfswrap_lseek(vfs_handle_struct *handle, files_struct *fsp, off_t offset, int whence)
 988 {
 989         off_t result = 0;
 990
 991         START_PROFILE(syscall_lseek);
 992
 993         /* Cope with 'stat' file opens. */
 994         if (fsp->fh->fd != -1)
 995                 result = lseek(fsp->fh->fd, offset, whence);
 996
 997         /*
 998          * We want to maintain the fiction that we can seek
 999          * on a fifo for file system purposes. This allows
1000          * people to set up UNIX fifo's that feed data to Windows
1001          * applications. JRA.
1002          */
1003
1004         if((result == -1) && (errno == ESPIPE)) {
1005                 result = 0;
1006                 errno = 0;
1007         }
1008
1009         END_PROFILE(syscall_lseek);
1010         return result;
1011 }
1012
1013 static ssize_t vfswrap_sendfile(vfs_handle_struct *handle, int tofd, files_struct *fromfsp, const DATA_BLOB *hdr,
1014                         off_t offset, size_t n)
1015 {
1016         ssize_t result;
1017
1018         START_PROFILE_BYTES(syscall_sendfile, n);
1019         result = sys_sendfile(tofd, fromfsp->fh->fd, hdr, offset, n);
1020         END_PROFILE_BYTES(syscall_sendfile);
1021         return result;
1022 }
1023
1024 static ssize_t vfswrap_recvfile(vfs_handle_struct *handle,
1025                         int fromfd,
1026                         files_struct *tofsp,
1027                         off_t offset,
1028                         size_t n)
1029 {
1030         ssize_t result;
1031
1032         START_PROFILE_BYTES(syscall_recvfile, n);
1033         result = sys_recvfile(fromfd, tofsp->fh->fd, offset, n);
1034         END_PROFILE_BYTES(syscall_recvfile);
1035         return result;
1036 }
1037
1038 static int vfswrap_rename(vfs_handle_struct *handle,
1039                           const struct smb_filename *smb_fname_src,
1040                           const struct smb_filename *smb_fname_dst)
1041 {
1042         int result = -1;
1043
1044         START_PROFILE(syscall_rename);
1045
1046         if (smb_fname_src->stream_name || smb_fname_dst->stream_name) {
1047                 errno = ENOENT;
1048                 goto out;
1049         }
1050
1051         result = rename(smb_fname_src->base_name, smb_fname_dst->base_name);
1052
1053  out:
1054         END_PROFILE(syscall_rename);
1055         return result;
1056 }
1057
1058 static int vfswrap_stat(vfs_handle_struct *handle,
1059                         struct smb_filename *smb_fname)
1060 {
1061         int result = -1;
1062
1063         START_PROFILE(syscall_stat);
1064
1065         if (smb_fname->stream_name) {
1066                 errno = ENOENT;
1067                 goto out;
1068         }
1069
1070         result = sys_stat(smb_fname->base_name, &smb_fname->st,
1071                           lp_fake_directory_create_times(SNUM(handle->conn)));
1072  out:
1073         END_PROFILE(syscall_stat);
1074         return result;
1075 }
1076
1077 static int vfswrap_fstat(vfs_handle_struct *handle, files_struct *fsp, SMB_STRUCT_STAT *sbuf)
1078 {
1079         int result;
1080
1081         START_PROFILE(syscall_fstat);
1082         result = sys_fstat(fsp->fh->fd,
1083                            sbuf, lp_fake_directory_create_times(SNUM(handle->conn)));
1084         END_PROFILE(syscall_fstat);
1085         return result;
1086 }
1087
1088 static int vfswrap_lstat(vfs_handle_struct *handle,
1089                          struct smb_filename *smb_fname)
1090 {
1091         int result = -1;
1092
1093         START_PROFILE(syscall_lstat);
1094
1095         if (smb_fname->stream_name) {
1096                 errno = ENOENT;
1097                 goto out;
1098         }
1099
1100         result = sys_lstat(smb_fname->base_name, &smb_fname->st,
1101                            lp_fake_directory_create_times(SNUM(handle->conn)));
1102  out:
1103         END_PROFILE(syscall_lstat);
1104         return result;
1105 }
1106
1107 static NTSTATUS vfswrap_translate_name(struct vfs_handle_struct *handle,
1108                                        const char *name,
1109                                        enum vfs_translate_direction direction,
1110                                        TALLOC_CTX *mem_ctx,
1111                                        char **mapped_name)
1112 {
1113         return NT_STATUS_NONE_MAPPED;
1114 }
1115
1116 /*
1117  * Implement the default fsctl operation.
1118  */
1119 static bool vfswrap_logged_ioctl_message = false;
1120
1121 static NTSTATUS vfswrap_fsctl(struct vfs_handle_struct *handle,
1122                               struct files_struct *fsp,
1123                               TALLOC_CTX *ctx,
1124                               uint32_t function,
1125                               uint16_t req_flags, /* Needed for UNICODE ... */
1126                               const uint8_t *_in_data,
1127                               uint32_t in_len,
1128                               uint8_t **_out_data,
1129                               uint32_t max_out_len,
1130                               uint32_t *out_len)
1131 {
1132         const char *in_data = (const char *)_in_data;
1133         char **out_data = (char **)_out_data;
1134         NTSTATUS status;
1135
1136         switch (function) {
1137         case FSCTL_SET_SPARSE:
1138         {
1139                 bool set_sparse = true;
1140
1141                 if (in_len >= 1 && in_data[0] == 0) {
1142                         set_sparse = false;
1143                 }
1144
1145                 status = file_set_sparse(handle->conn, fsp, set_sparse);
1146
1147                 DEBUG(NT_STATUS_IS_OK(status) ? 10 : 9,
1148                       ("FSCTL_SET_SPARSE: fname[%s] set[%u] - %s\n",
1149                        smb_fname_str_dbg(fsp->fsp_name), set_sparse,
1150                        nt_errstr(status)));
1151
1152                 return status;
1153         }
1154
1155         case FSCTL_CREATE_OR_GET_OBJECT_ID:
1156         {
1157                 unsigned char objid[16];
1158                 char *return_data = NULL;
1159
1160                 /* This should return the object-id on this file.
1161                  * I think I'll make this be the inode+dev. JRA.
1162                  */
1163
1164                 DEBUG(10,("FSCTL_CREATE_OR_GET_OBJECT_ID: called on %s\n",
1165                           fsp_fnum_dbg(fsp)));
1166
1167                 *out_len = MIN(max_out_len, 64);
1168
1169                 /* Hmmm, will this cause problems if less data asked for? */
1170                 return_data = talloc_array(ctx, char, 64);
1171                 if (return_data == NULL) {
1172                         return NT_STATUS_NO_MEMORY;
1173                 }
1174
1175                 /* For backwards compatibility only store the dev/inode. */
1176                 push_file_id_16(return_data, &fsp->file_id);
1177                 memcpy(return_data+16,create_volume_objectid(fsp->conn,objid),16);
1178                 push_file_id_16(return_data+32, &fsp->file_id);
1179                 memset(return_data+48, 0, 16);
1180                 *out_data = return_data;
1181                 return NT_STATUS_OK;
1182         }
1183
1184         case FSCTL_GET_REPARSE_POINT:
1185         {
1186                 /* Fail it with STATUS_NOT_A_REPARSE_POINT */
1187                 DEBUG(10, ("FSCTL_GET_REPARSE_POINT: called on %s. "
1188                            "Status: NOT_IMPLEMENTED\n", fsp_fnum_dbg(fsp)));
1189                 return NT_STATUS_NOT_A_REPARSE_POINT;
1190         }
1191
1192         case FSCTL_SET_REPARSE_POINT:
1193         {
1194                 /* Fail it with STATUS_NOT_A_REPARSE_POINT */
1195                 DEBUG(10, ("FSCTL_SET_REPARSE_POINT: called on %s. "
1196                            "Status: NOT_IMPLEMENTED\n", fsp_fnum_dbg(fsp)));
1197                 return NT_STATUS_NOT_A_REPARSE_POINT;
1198         }
1199
1200         case FSCTL_GET_SHADOW_COPY_DATA:
1201         {
1202                 /*
1203                  * This is called to retrieve the number of Shadow Copies (a.k.a. snapshots)
1204                  * and return their volume names.  If max_data_count is 16, then it is just
1205                  * asking for the number of volumes and length of the combined names.
1206                  *
1207                  * pdata is the data allocated by our caller, but that uses
1208                  * total_data_count (which is 0 in our case) rather than max_data_count.
1209                  * Allocate the correct amount and return the pointer to let
1210                  * it be deallocated when we return.
1211                  */
1212                 struct shadow_copy_data *shadow_data = NULL;
1213                 bool labels = False;
1214                 uint32_t labels_data_count = 0;
1215                 uint32_t i;
1216                 char *cur_pdata = NULL;
1217
1218                 if (max_out_len < 16) {
1219                         DEBUG(0,("FSCTL_GET_SHADOW_COPY_DATA: max_data_count(%u) < 16 is invalid!\n",
1220                                 max_out_len));
1221                         return NT_STATUS_INVALID_PARAMETER;
1222                 }
1223
1224                 if (max_out_len > 16) {
1225                         labels = True;
1226                 }
1227
1228                 shadow_data = talloc_zero(ctx, struct shadow_copy_data);
1229                 if (shadow_data == NULL) {
1230                         DEBUG(0,("TALLOC_ZERO() failed!\n"));
1231                         return NT_STATUS_NO_MEMORY;
1232                 }
1233
1234                 /*
1235                  * Call the VFS routine to actually do the work.
1236                  */
1237                 if (SMB_VFS_GET_SHADOW_COPY_DATA(fsp, shadow_data, labels)!=0) {
1238                         int log_lev = 0;
1239                         if (errno == 0) {
1240                                 /* broken module didn't set errno on error */
1241                                 status = NT_STATUS_UNSUCCESSFUL;
1242                         } else {
1243                                 status = map_nt_error_from_unix(errno);
1244                                 if (NT_STATUS_EQUAL(status,
1245                                                     NT_STATUS_NOT_SUPPORTED)) {
1246                                         log_lev = 5;
1247                                 }
1248                         }
1249                         DEBUG(log_lev, ("FSCTL_GET_SHADOW_COPY_DATA: "
1250                                         "connectpath %s, failed - %s.\n",
1251                                         fsp->conn->connectpath,
1252                                         nt_errstr(status)));
1253                         TALLOC_FREE(shadow_data);
1254                         return status;
1255                 }
1256
1257                 labels_data_count = (shadow_data->num_volumes * 2 *
1258                                         sizeof(SHADOW_COPY_LABEL)) + 2;
1259
1260                 if (!labels) {
1261                         *out_len = 16;
1262                 } else {
1263                         *out_len = 12 + labels_data_count;
1264                 }
1265
1266                 if (max_out_len < *out_len) {
1267                         DEBUG(0,("FSCTL_GET_SHADOW_COPY_DATA: max_data_count(%u) too small (%u) bytes needed!\n",
1268                                 max_out_len, *out_len));
1269                         TALLOC_FREE(shadow_data);
1270                         return NT_STATUS_BUFFER_TOO_SMALL;
1271                 }
1272
1273                 cur_pdata = talloc_zero_array(ctx, char, *out_len);
1274                 if (cur_pdata == NULL) {
1275                         TALLOC_FREE(shadow_data);
1276                         return NT_STATUS_NO_MEMORY;
1277                 }
1278
1279                 *out_data = cur_pdata;
1280
1281                 /* num_volumes 4 bytes */
1282                 SIVAL(cur_pdata, 0, shadow_data->num_volumes);
1283
1284                 if (labels) {
1285                         /* num_labels 4 bytes */
1286                         SIVAL(cur_pdata, 4, shadow_data->num_volumes);
1287                 }
1288
1289                 /* needed_data_count 4 bytes */
1290                 SIVAL(cur_pdata, 8, labels_data_count);
1291
1292                 cur_pdata += 12;
1293
1294                 DEBUG(10,("FSCTL_GET_SHADOW_COPY_DATA: %u volumes for path[%s].\n",
1295                           shadow_data->num_volumes, fsp_str_dbg(fsp)));
1296                 if (labels && shadow_data->labels) {
1297                         for (i=0; i<shadow_data->num_volumes; i++) {
1298                                 size_t len = 0;
1299                                 status = srvstr_push(cur_pdata, req_flags,
1300                                             cur_pdata, shadow_data->labels[i],
1301                                             2 * sizeof(SHADOW_COPY_LABEL),
1302                                             STR_UNICODE|STR_TERMINATE, &len);
1303                                 if (!NT_STATUS_IS_OK(status)) {
1304                                         TALLOC_FREE(*out_data);
1305                                         TALLOC_FREE(shadow_data);
1306                                         return status;
1307                                 }
1308                                 cur_pdata += 2 * sizeof(SHADOW_COPY_LABEL);
1309                                 DEBUGADD(10,("Label[%u]: '%s'\n",i,shadow_data->labels[i]));
1310                         }
1311                 }
1312
1313                 TALLOC_FREE(shadow_data);
1314
1315                 return NT_STATUS_OK;
1316         }
1317
1318         case FSCTL_FIND_FILES_BY_SID:
1319         {
1320                 /* pretend this succeeded -
1321                  *
1322                  * we have to send back a list with all files owned by this SID
1323                  *
1324                  * but I have to check that --metze
1325                  */
1326                 struct dom_sid sid;
1327                 uid_t uid;
1328                 size_t sid_len;
1329
1330                 DEBUG(10, ("FSCTL_FIND_FILES_BY_SID: called on %s\n",
1331                            fsp_fnum_dbg(fsp)));
1332
1333                 if (in_len < 8) {
1334                         /* NT_STATUS_BUFFER_TOO_SMALL maybe? */
1335                         return NT_STATUS_INVALID_PARAMETER;
1336                 }
1337
1338                 sid_len = MIN(in_len - 4,SID_MAX_SIZE);
1339
1340                 /* unknown 4 bytes: this is not the length of the sid :-(  */
1341                 /*unknown = IVAL(pdata,0);*/
1342
1343                 if (!sid_parse(_in_data + 4, sid_len, &sid)) {
1344                         return NT_STATUS_INVALID_PARAMETER;
1345                 }
1346                 DEBUGADD(10, ("for SID: %s\n", sid_string_dbg(&sid)));
1347
1348                 if (!sid_to_uid(&sid, &uid)) {
1349                         DEBUG(0,("sid_to_uid: failed, sid[%s] sid_len[%lu]\n",
1350                                  sid_string_dbg(&sid),
1351                                  (unsigned long)sid_len));
1352                         uid = (-1);
1353                 }
1354
1355                 /* we can take a look at the find source :-)
1356                  *
1357                  * find ./ -uid $uid  -name '*'   is what we need here
1358                  *
1359                  *
1360                  * and send 4bytes len and then NULL terminated unicode strings
1361                  * for each file
1362                  *
1363                  * but I don't know how to deal with the paged results
1364                  * (maybe we can hang the result anywhere in the fsp struct)
1365                  *
1366                  * but I don't know how to deal with the paged results
1367                  * (maybe we can hang the result anywhere in the fsp struct)
1368                  *
1369                  * we don't send all files at once
1370                  * and at the next we should *not* start from the beginning,
1371                  * so we have to cache the result
1372                  *
1373                  * --metze
1374                  */
1375
1376                 /* this works for now... */
1377                 return NT_STATUS_OK;
1378         }
1379
1380         case FSCTL_QUERY_ALLOCATED_RANGES:
1381         {
1382                 /* FIXME: This is just a dummy reply, telling that all of the
1383                  * file is allocated. MKS cp needs that.
1384                  * Adding the real allocated ranges via FIEMAP on Linux
1385                  * and SEEK_DATA/SEEK_HOLE on Solaris is needed to make
1386                  * this FSCTL correct for sparse files.
1387                  */
1388                 uint64_t offset, length;
1389                 char *out_data_tmp = NULL;
1390
1391                 if (in_len != 16) {
1392                         DEBUG(0,("FSCTL_QUERY_ALLOCATED_RANGES: data_count(%u) != 16 is invalid!\n",
1393                                 in_len));
1394                         return NT_STATUS_INVALID_PARAMETER;
1395                 }
1396
1397                 if (max_out_len < 16) {
1398                         DEBUG(0,("FSCTL_QUERY_ALLOCATED_RANGES: max_out_len (%u) < 16 is invalid!\n",
1399                                 max_out_len));
1400                         return NT_STATUS_INVALID_PARAMETER;
1401                 }
1402
1403                 offset = BVAL(in_data,0);
1404                 length = BVAL(in_data,8);
1405
1406                 if (offset + length < offset) {
1407                         /* No 64-bit integer wrap. */
1408                         return NT_STATUS_INVALID_PARAMETER;
1409                 }
1410
1411                 /* Shouldn't this be SMB_VFS_STAT ... ? */
1412                 status = vfs_stat_fsp(fsp);
1413                 if (!NT_STATUS_IS_OK(status)) {
1414                         return status;
1415                 }
1416
1417                 *out_len = 16;
1418                 out_data_tmp = talloc_array(ctx, char, *out_len);
1419                 if (out_data_tmp == NULL) {
1420                         DEBUG(10, ("unable to allocate memory for response\n"));
1421                         return NT_STATUS_NO_MEMORY;
1422                 }
1423
1424                 if (offset > fsp->fsp_name->st.st_ex_size ||
1425                                 fsp->fsp_name->st.st_ex_size == 0 ||
1426                                 length == 0) {
1427                         memset(out_data_tmp, 0, *out_len);
1428                 } else {
1429                         uint64_t end = offset + length;
1430                         end = MIN(end, fsp->fsp_name->st.st_ex_size);
1431                         SBVAL(out_data_tmp, 0, 0);
1432                         SBVAL(out_data_tmp, 8, end);
1433                 }
1434
1435                 *out_data = out_data_tmp;
1436
1437                 return NT_STATUS_OK;
1438         }
1439
1440         case FSCTL_IS_VOLUME_DIRTY:
1441         {
1442                 DEBUG(10,("FSCTL_IS_VOLUME_DIRTY: called on %s "
1443                           "(but remotely not supported)\n", fsp_fnum_dbg(fsp)));
1444                 /*
1445                  * http://msdn.microsoft.com/en-us/library/cc232128%28PROT.10%29.aspx
1446                  * says we have to respond with NT_STATUS_INVALID_PARAMETER
1447                  */
1448                 return NT_STATUS_INVALID_PARAMETER;
1449         }
1450
1451         default:
1452                 /*
1453                  * Only print once ... unfortunately there could be lots of
1454                  * different FSCTLs that are called.
1455                  */
1456                 if (!vfswrap_logged_ioctl_message) {
1457                         vfswrap_logged_ioctl_message = true;
1458                         DEBUG(2, ("%s (0x%x): Currently not implemented.\n",
1459                         __func__, function));
1460                 }
1461         }
1462
1463         return NT_STATUS_NOT_SUPPORTED;
1464 }
1465
1466 static bool vfswrap_is_offline(struct vfs_handle_struct *handle,
1467                                const struct smb_filename *fname,
1468                                SMB_STRUCT_STAT *sbuf);
1469
1470 static NTSTATUS vfswrap_get_dos_attributes(struct vfs_handle_struct *handle,
1471                                            struct smb_filename *smb_fname,
1472                                            uint32_t *dosmode)
1473 {
1474         bool offline;
1475
1476         offline = vfswrap_is_offline(handle, smb_fname, &smb_fname->st);
1477         if (offline) {
1478                 *dosmode |= FILE_ATTRIBUTE_OFFLINE;
1479         }
1480
1481         return get_ea_dos_attribute(handle->conn, smb_fname, dosmode);
1482 }
1483
1484 static NTSTATUS vfswrap_fget_dos_attributes(struct vfs_handle_struct *handle,
1485                                             struct files_struct *fsp,
1486                                             uint32_t *dosmode)
1487 {
1488         bool offline;
1489
1490         offline = vfswrap_is_offline(handle, fsp->fsp_name, &fsp->fsp_name->st);
1491         if (offline) {
1492                 *dosmode |= FILE_ATTRIBUTE_OFFLINE;
1493         }
1494
1495         return get_ea_dos_attribute(handle->conn, fsp->fsp_name, dosmode);
1496 }
1497
1498 static NTSTATUS vfswrap_set_dos_attributes(struct vfs_handle_struct *handle,
1499                                            const struct smb_filename *smb_fname,
1500                                            uint32_t dosmode)
1501 {
1502         return set_ea_dos_attribute(handle->conn, smb_fname, dosmode);
1503 }
1504
1505 static NTSTATUS vfswrap_fset_dos_attributes(struct vfs_handle_struct *handle,
1506                                             struct files_struct *fsp,
1507                                             uint32_t dosmode)
1508 {
1509         return set_ea_dos_attribute(handle->conn, fsp->fsp_name, dosmode);
1510 }
1511
1512 static struct vfs_offload_ctx *vfswrap_offload_ctx;
1513
1514 struct vfswrap_offload_read_state {
1515         DATA_BLOB token;
1516 };
1517
1518 static struct tevent_req *vfswrap_offload_read_send(
1519         TALLOC_CTX *mem_ctx,
1520         struct tevent_context *ev,
1521         struct vfs_handle_struct *handle,
1522         struct files_struct *fsp,
1523         uint32_t fsctl,
1524         uint32_t ttl,
1525         off_t offset,
1526         size_t to_copy)
1527 {
1528         struct tevent_req *req = NULL;
1529         struct vfswrap_offload_read_state *state = NULL;
1530         NTSTATUS status;
1531
1532         req = tevent_req_create(mem_ctx, &state,
1533                                 struct vfswrap_offload_read_state);
1534         if (req == NULL) {
1535                 return NULL;
1536         }
1537
1538         status = vfs_offload_token_ctx_init(fsp->conn->sconn->client,
1539                                             &vfswrap_offload_ctx);
1540         if (tevent_req_nterror(req, status)) {
1541                 return tevent_req_post(req, ev);
1542         }
1543
1544         if (fsctl != FSCTL_SRV_REQUEST_RESUME_KEY) {
1545                 tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
1546                 return tevent_req_post(req, ev);
1547         }
1548
1549         status = vfs_offload_token_create_blob(state, fsp, fsctl,
1550                                                &state->token);
1551         if (tevent_req_nterror(req, status)) {
1552                 return tevent_req_post(req, ev);
1553         }
1554
1555         status = vfs_offload_token_db_store_fsp(vfswrap_offload_ctx, fsp,
1556                                                 &state->token);
1557         if (tevent_req_nterror(req, status)) {
1558                 return tevent_req_post(req, ev);
1559         }
1560
1561         tevent_req_done(req);
1562         return tevent_req_post(req, ev);
1563 }
1564
1565 static NTSTATUS vfswrap_offload_read_recv(struct tevent_req *req,
1566                                           struct vfs_handle_struct *handle,
1567                                           TALLOC_CTX *mem_ctx,
1568                                           DATA_BLOB *token)
1569 {
1570         struct vfswrap_offload_read_state *state = tevent_req_data(
1571                 req, struct vfswrap_offload_read_state);
1572         NTSTATUS status;
1573
1574         if (tevent_req_is_nterror(req, &status)) {
1575                 tevent_req_received(req);
1576                 return status;
1577         }
1578
1579         token->length = state->token.length;
1580         token->data = talloc_move(mem_ctx, &state->token.data);
1581
1582         tevent_req_received(req);
1583         return NT_STATUS_OK;
1584 }
1585
1586 struct vfswrap_offload_write_state {
1587         uint8_t *buf;
1588         bool read_lck_locked;
1589         bool write_lck_locked;
1590         DATA_BLOB *token;
1591         struct tevent_context *src_ev;
1592         struct files_struct *src_fsp;
1593         off_t src_off;
1594         struct tevent_context *dst_ev;
1595         struct files_struct *dst_fsp;
1596         off_t dst_off;
1597         off_t to_copy;
1598         off_t remaining;
1599         size_t next_io_size;
1600 };
1601
1602 static void vfswrap_offload_write_cleanup(struct tevent_req *req,
1603                                           enum tevent_req_state req_state)
1604 {
1605         struct vfswrap_offload_write_state *state = tevent_req_data(
1606                 req, struct vfswrap_offload_write_state);
1607         bool ok;
1608
1609         if (state->dst_fsp == NULL) {
1610                 return;
1611         }
1612
1613         ok = change_to_user_by_fsp(state->dst_fsp);
1614         SMB_ASSERT(ok);
1615         state->dst_fsp = NULL;
1616 }
1617
1618 static NTSTATUS vfswrap_offload_write_loop(struct tevent_req *req);
1619
1620 static struct tevent_req *vfswrap_offload_write_send(
1621         struct vfs_handle_struct *handle,
1622         TALLOC_CTX *mem_ctx,
1623         struct tevent_context *ev,
1624         uint32_t fsctl,
1625         DATA_BLOB *token,
1626         off_t transfer_offset,
1627         struct files_struct *dest_fsp,
1628         off_t dest_off,
1629         off_t to_copy)
1630 {
1631         struct tevent_req *req;
1632         struct vfswrap_offload_write_state *state = NULL;
1633         size_t num = MIN(to_copy, COPYCHUNK_MAX_TOTAL_LEN);
1634         files_struct *src_fsp = NULL;
1635         NTSTATUS status;
1636         bool ok;
1637
1638         req = tevent_req_create(mem_ctx, &state,
1639                                 struct vfswrap_offload_write_state);
1640         if (req == NULL) {
1641                 return NULL;
1642         }
1643
1644         *state = (struct vfswrap_offload_write_state) {
1645                 .token = token,
1646                 .src_off = transfer_offset,
1647                 .dst_ev = ev,
1648                 .dst_fsp = dest_fsp,
1649                 .dst_off = dest_off,
1650                 .to_copy = to_copy,
1651                 .remaining = to_copy,
1652         };
1653
1654         tevent_req_set_cleanup_fn(req, vfswrap_offload_write_cleanup);
1655
1656         switch (fsctl) {
1657         case FSCTL_SRV_COPYCHUNK:
1658         case FSCTL_SRV_COPYCHUNK_WRITE:
1659                 break;
1660
1661         case FSCTL_OFFLOAD_WRITE:
1662                 tevent_req_nterror(req, NT_STATUS_NOT_IMPLEMENTED);
1663                 return tevent_req_post(req, ev);
1664
1665         case FSCTL_DUP_EXTENTS_TO_FILE:
1666                 DBG_DEBUG("COW clones not supported by vfs_default\n");
1667                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
1668                 return tevent_req_post(req, ev);
1669
1670         default:
1671                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
1672                 return tevent_req_post(req, ev);
1673         }
1674
1675         /*
1676          * From here on we assume a copy-chunk fsctl
1677          */
1678
1679         if (to_copy == 0) {
1680                 tevent_req_done(req);
1681                 return tevent_req_post(req, ev);
1682         }
1683
1684         status = vfs_offload_token_db_fetch_fsp(vfswrap_offload_ctx,
1685                                                 token, &src_fsp);
1686         if (tevent_req_nterror(req, status)) {
1687                 return tevent_req_post(req, ev);
1688         }
1689
1690         DBG_DEBUG("server side copy chunk of length %" PRIu64 "\n", to_copy);
1691
1692         status = vfs_offload_token_check_handles(fsctl, src_fsp, dest_fsp);
1693         if (!NT_STATUS_IS_OK(status)) {
1694                 tevent_req_nterror(req, status);
1695                 return tevent_req_post(req, ev);
1696         }
1697
1698         ok = change_to_user_by_fsp(src_fsp);
1699         if (!ok) {
1700                 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
1701                 return tevent_req_post(req, ev);
1702         }
1703
1704         state->src_ev = src_fsp->conn->user_ev_ctx;
1705         state->src_fsp = src_fsp;
1706
1707         state->buf = talloc_array(state, uint8_t, num);
1708         if (tevent_req_nomem(state->buf, req)) {
1709                 return tevent_req_post(req, ev);
1710         }
1711
1712         status = vfs_stat_fsp(src_fsp);
1713         if (tevent_req_nterror(req, status)) {
1714                 return tevent_req_post(req, ev);
1715         }
1716
1717         if (src_fsp->fsp_name->st.st_ex_size < state->src_off + num) {
1718                 /*
1719                  * [MS-SMB2] 3.3.5.15.6 Handling a Server-Side Data Copy Request
1720                  *   If the SourceOffset or SourceOffset + Length extends beyond
1721                  *   the end of file, the server SHOULD<240> treat this as a
1722                  *   STATUS_END_OF_FILE error.
1723                  * ...
1724                  *   <240> Section 3.3.5.15.6: Windows servers will return
1725                  *   STATUS_INVALID_VIEW_SIZE instead of STATUS_END_OF_FILE.
1726                  */
1727                 tevent_req_nterror(req, NT_STATUS_INVALID_VIEW_SIZE);
1728                 return tevent_req_post(req, ev);
1729         }
1730
1731         status = vfswrap_offload_write_loop(req);
1732         if (!NT_STATUS_IS_OK(status)) {
1733                 tevent_req_nterror(req, status);
1734                 return tevent_req_post(req, ev);
1735         }
1736
1737         return req;
1738 }
1739
1740 static void vfswrap_offload_write_read_done(struct tevent_req *subreq);
1741
1742 static NTSTATUS vfswrap_offload_write_loop(struct tevent_req *req)
1743 {
1744         struct vfswrap_offload_write_state *state = tevent_req_data(
1745                 req, struct vfswrap_offload_write_state);
1746         struct tevent_req *subreq = NULL;
1747         struct lock_struct read_lck;
1748         bool ok;
1749
1750         /*
1751          * This is called under the context of state->src_fsp.
1752          */
1753
1754         state->next_io_size = MIN(state->remaining, talloc_array_length(state->buf));
1755
1756         init_strict_lock_struct(state->src_fsp,
1757                                 state->src_fsp->op->global->open_persistent_id,
1758                                 state->src_off,
1759                                 state->next_io_size,
1760                                 READ_LOCK,
1761                                 &read_lck);
1762
1763         ok = SMB_VFS_STRICT_LOCK_CHECK(state->src_fsp->conn,
1764                                  state->src_fsp,
1765                                  &read_lck);
1766         if (!ok) {
1767                 return NT_STATUS_FILE_LOCK_CONFLICT;
1768         }
1769
1770         subreq = SMB_VFS_PREAD_SEND(state,
1771                                     state->src_ev,
1772                                     state->src_fsp,
1773                                     state->buf,
1774                                     state->next_io_size,
1775                                     state->src_off);
1776         if (subreq == NULL) {
1777                 return NT_STATUS_NO_MEMORY;
1778         }
1779         tevent_req_set_callback(subreq, vfswrap_offload_write_read_done, req);
1780
1781         return NT_STATUS_OK;
1782 }
1783
1784 static void vfswrap_offload_write_write_done(struct tevent_req *subreq);
1785
1786 static void vfswrap_offload_write_read_done(struct tevent_req *subreq)
1787 {
1788         struct tevent_req *req = tevent_req_callback_data(
1789                 subreq, struct tevent_req);
1790         struct vfswrap_offload_write_state *state = tevent_req_data(
1791                 req, struct vfswrap_offload_write_state);
1792         struct vfs_aio_state aio_state;
1793         struct lock_struct write_lck;
1794         ssize_t nread;
1795         bool ok;
1796
1797         nread = SMB_VFS_PREAD_RECV(subreq, &aio_state);
1798         TALLOC_FREE(subreq);
1799         if (nread == -1) {
1800                 DBG_ERR("read failed: %s\n", strerror(errno));
1801                 tevent_req_nterror(req, map_nt_error_from_unix(aio_state.error));
1802                 return;
1803         }
1804         if (nread != state->next_io_size) {
1805                 DBG_ERR("Short read, only %zd of %zu\n",
1806                         nread, state->next_io_size);
1807                 tevent_req_nterror(req, NT_STATUS_IO_DEVICE_ERROR);
1808                 return;
1809         }
1810
1811         state->src_off += nread;
1812
1813         ok = change_to_user_by_fsp(state->dst_fsp);
1814         if (!ok) {
1815                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
1816                 return;
1817         }
1818
1819         init_strict_lock_struct(state->dst_fsp,
1820                                 state->dst_fsp->op->global->open_persistent_id,
1821                                 state->dst_off,
1822                                 state->next_io_size,
1823                                 WRITE_LOCK,
1824                                 &write_lck);
1825
1826         ok = SMB_VFS_STRICT_LOCK_CHECK(state->dst_fsp->conn,
1827                                  state->dst_fsp,
1828                                  &write_lck);
1829         if (!ok) {
1830                 tevent_req_nterror(req, NT_STATUS_FILE_LOCK_CONFLICT);
1831                 return;
1832         }
1833
1834         subreq = SMB_VFS_PWRITE_SEND(state,
1835                                      state->dst_ev,
1836                                      state->dst_fsp,
1837                                      state->buf,
1838                                      state->next_io_size,
1839                                      state->dst_off);
1840         if (subreq == NULL) {
1841                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1842                 return;
1843         }
1844         tevent_req_set_callback(subreq, vfswrap_offload_write_write_done, req);
1845 }
1846
1847 static void vfswrap_offload_write_write_done(struct tevent_req *subreq)
1848 {
1849         struct tevent_req *req = tevent_req_callback_data(
1850                 subreq, struct tevent_req);
1851         struct vfswrap_offload_write_state *state = tevent_req_data(
1852                 req, struct vfswrap_offload_write_state);
1853         struct vfs_aio_state aio_state;
1854         ssize_t nwritten;
1855         NTSTATUS status;
1856         bool ok;
1857
1858         nwritten = SMB_VFS_PWRITE_RECV(subreq, &aio_state);
1859         TALLOC_FREE(subreq);
1860         if (nwritten == -1) {
1861                 DBG_ERR("write failed: %s\n", strerror(errno));
1862                 tevent_req_nterror(req, map_nt_error_from_unix(aio_state.error));
1863                 return;
1864         }
1865         if (nwritten != state->next_io_size) {
1866                 DBG_ERR("Short write, only %zd of %zu\n", nwritten, state->next_io_size);
1867                 tevent_req_nterror(req, NT_STATUS_IO_DEVICE_ERROR);
1868                 return;
1869         }
1870
1871         state->dst_off += nwritten;
1872
1873         if (state->remaining < nwritten) {
1874                 /* Paranoia check */
1875                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
1876                 return;
1877         }
1878         state->remaining -= nwritten;
1879         if (state->remaining == 0) {
1880                 tevent_req_done(req);
1881                 return;
1882         }
1883
1884         ok = change_to_user_by_fsp(state->src_fsp);
1885         if (!ok) {
1886                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
1887                 return;
1888         }
1889
1890         status = vfswrap_offload_write_loop(req);
1891         if (!NT_STATUS_IS_OK(status)) {
1892                 tevent_req_nterror(req, status);
1893                 return;
1894         }
1895
1896         return;
1897 }
1898
1899 static NTSTATUS vfswrap_offload_write_recv(struct vfs_handle_struct *handle,
1900                                         struct tevent_req *req,
1901                                         off_t *copied)
1902 {
1903         struct vfswrap_offload_write_state *state = tevent_req_data(
1904                 req, struct vfswrap_offload_write_state);
1905         NTSTATUS status;
1906
1907         if (tevent_req_is_nterror(req, &status)) {
1908                 DBG_DEBUG("copy chunk failed: %s\n", nt_errstr(status));
1909                 *copied = 0;
1910                 tevent_req_received(req);
1911                 return status;
1912         }
1913
1914         *copied = state->to_copy;
1915         DBG_DEBUG("copy chunk copied %lu\n", (unsigned long)*copied);
1916         tevent_req_received(req);
1917
1918         return NT_STATUS_OK;
1919 }
1920
1921 static NTSTATUS vfswrap_get_compression(struct vfs_handle_struct *handle,
1922                                         TALLOC_CTX *mem_ctx,
1923                                         struct files_struct *fsp,
1924                                         struct smb_filename *smb_fname,
1925                                         uint16_t *_compression_fmt)
1926 {
1927         return NT_STATUS_INVALID_DEVICE_REQUEST;
1928 }
1929
1930 static NTSTATUS vfswrap_set_compression(struct vfs_handle_struct *handle,
1931                                         TALLOC_CTX *mem_ctx,
1932                                         struct files_struct *fsp,
1933                                         uint16_t compression_fmt)
1934 {
1935         return NT_STATUS_INVALID_DEVICE_REQUEST;
1936 }
1937
1938 /********************************************************************
1939  Given a stat buffer return the allocated size on disk, taking into
1940  account sparse files.
1941 ********************************************************************/
1942 static uint64_t vfswrap_get_alloc_size(vfs_handle_struct *handle,
1943                                        struct files_struct *fsp,
1944                                        const SMB_STRUCT_STAT *sbuf)
1945 {
1946         uint64_t result;
1947
1948         START_PROFILE(syscall_get_alloc_size);
1949
1950         if(S_ISDIR(sbuf->st_ex_mode)) {
1951                 result = 0;
1952                 goto out;
1953         }
1954
1955 #if defined(HAVE_STAT_ST_BLOCKS) && defined(STAT_ST_BLOCKSIZE)
1956         /* The type of st_blocksize is blkcnt_t which *MUST* be
1957            signed (according to POSIX) and can be less than 64-bits.
1958            Ensure when we're converting to 64 bits wide we don't
1959            sign extend. */
1960 #if defined(SIZEOF_BLKCNT_T_8)
1961         result = (uint64_t)STAT_ST_BLOCKSIZE * (uint64_t)sbuf->st_ex_blocks;
1962 #elif defined(SIZEOF_BLKCNT_T_4)
1963         {
1964                 uint64_t bs = ((uint64_t)sbuf->st_ex_blocks) & 0xFFFFFFFFLL;
1965                 result = (uint64_t)STAT_ST_BLOCKSIZE * bs;
1966         }
1967 #else
1968 #error SIZEOF_BLKCNT_T_NOT_A_SUPPORTED_VALUE
1969 #endif
1970         if (result == 0) {
1971                 /*
1972                  * Some file systems do not allocate a block for very
1973                  * small files. But for non-empty file should report a
1974                  * positive size.
1975                  */
1976
1977                 uint64_t filesize = get_file_size_stat(sbuf);
1978                 if (filesize > 0) {
1979                         result = MIN((uint64_t)STAT_ST_BLOCKSIZE, filesize);
1980                 }
1981         }
1982 #else
1983         result = get_file_size_stat(sbuf);
1984 #endif
1985
1986         if (fsp && fsp->initial_allocation_size)
1987                 result = MAX(result,fsp->initial_allocation_size);
1988
1989         result = smb_roundup(handle->conn, result);
1990
1991  out:
1992         END_PROFILE(syscall_get_alloc_size);
1993         return result;
1994 }
1995
1996 static int vfswrap_unlink(vfs_handle_struct *handle,
1997                           const struct smb_filename *smb_fname)
1998 {
1999         int result = -1;
2000
2001         START_PROFILE(syscall_unlink);
2002
2003         if (smb_fname->stream_name) {
2004                 errno = ENOENT;
2005                 goto out;
2006         }
2007         result = unlink(smb_fname->base_name);
2008
2009  out:
2010         END_PROFILE(syscall_unlink);
2011         return result;
2012 }
2013
2014 static int vfswrap_chmod(vfs_handle_struct *handle,
2015                         const struct smb_filename *smb_fname,
2016                         mode_t mode)
2017 {
2018         int result;
2019
2020         START_PROFILE(syscall_chmod);
2021         result = chmod(smb_fname->base_name, mode);
2022         END_PROFILE(syscall_chmod);
2023         return result;
2024 }
2025
2026 static int vfswrap_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
2027 {
2028         int result;
2029
2030         START_PROFILE(syscall_fchmod);
2031 #if defined(HAVE_FCHMOD)
2032         result = fchmod(fsp->fh->fd, mode);
2033 #else
2034         result = -1;
2035         errno = ENOSYS;
2036 #endif
2037
2038         END_PROFILE(syscall_fchmod);
2039         return result;
2040 }
2041
2042 static int vfswrap_chown(vfs_handle_struct *handle,
2043                         const struct smb_filename *smb_fname,
2044                         uid_t uid,
2045                         gid_t gid)
2046 {
2047         int result;
2048
2049         START_PROFILE(syscall_chown);
2050         result = chown(smb_fname->base_name, uid, gid);
2051         END_PROFILE(syscall_chown);
2052         return result;
2053 }
2054
2055 static int vfswrap_fchown(vfs_handle_struct *handle, files_struct *fsp, uid_t uid, gid_t gid)
2056 {
2057 #ifdef HAVE_FCHOWN
2058         int result;
2059
2060         START_PROFILE(syscall_fchown);
2061         result = fchown(fsp->fh->fd, uid, gid);
2062         END_PROFILE(syscall_fchown);
2063         return result;
2064 #else
2065         errno = ENOSYS;
2066         return -1;
2067 #endif
2068 }
2069
2070 static int vfswrap_lchown(vfs_handle_struct *handle,
2071                         const struct smb_filename *smb_fname,
2072                         uid_t uid,
2073                         gid_t gid)
2074 {
2075         int result;
2076
2077         START_PROFILE(syscall_lchown);
2078         result = lchown(smb_fname->base_name, uid, gid);
2079         END_PROFILE(syscall_lchown);
2080         return result;
2081 }
2082
2083 static int vfswrap_chdir(vfs_handle_struct *handle,
2084                         const struct smb_filename *smb_fname)
2085 {
2086         int result;
2087
2088         START_PROFILE(syscall_chdir);
2089         result = chdir(smb_fname->base_name);
2090         END_PROFILE(syscall_chdir);
2091         return result;
2092 }
2093
2094 static struct smb_filename *vfswrap_getwd(vfs_handle_struct *handle,
2095                                 TALLOC_CTX *ctx)
2096 {
2097         char *result;
2098         struct smb_filename *smb_fname = NULL;
2099
2100         START_PROFILE(syscall_getwd);
2101         result = sys_getwd();
2102         END_PROFILE(syscall_getwd);
2103
2104         if (result == NULL) {
2105                 return NULL;
2106         }
2107         smb_fname = synthetic_smb_fname(ctx,
2108                                 result,
2109                                 NULL,
2110                                 NULL,
2111                                 0);
2112         /*
2113          * sys_getwd() *always* returns malloced memory.
2114          * We must free here to avoid leaks:
2115          * BUG:https://bugzilla.samba.org/show_bug.cgi?id=13372
2116          */
2117         SAFE_FREE(result);
2118         return smb_fname;
2119 }
2120
2121 /*********************************************************************
2122  nsec timestamp resolution call. Convert down to whatever the underlying
2123  system will support.
2124 **********************************************************************/
2125
2126 static int vfswrap_ntimes(vfs_handle_struct *handle,
2127                           const struct smb_filename *smb_fname,
2128                           struct smb_file_time *ft)
2129 {
2130         int result = -1;
2131
2132         START_PROFILE(syscall_ntimes);
2133
2134         if (smb_fname->stream_name) {
2135                 errno = ENOENT;
2136                 goto out;
2137         }
2138
2139         if (ft != NULL) {
2140                 if (null_timespec(ft->atime)) {
2141                         ft->atime= smb_fname->st.st_ex_atime;
2142                 }
2143
2144                 if (null_timespec(ft->mtime)) {
2145                         ft->mtime = smb_fname->st.st_ex_mtime;
2146                 }
2147
2148                 if (!null_timespec(ft->create_time)) {
2149                         set_create_timespec_ea(handle->conn,
2150                                                smb_fname,
2151                                                ft->create_time);
2152                 }
2153
2154                 if ((timespec_compare(&ft->atime,
2155                                       &smb_fname->st.st_ex_atime) == 0) &&
2156                     (timespec_compare(&ft->mtime,
2157                                       &smb_fname->st.st_ex_mtime) == 0)) {
2158                         return 0;
2159                 }
2160         }
2161
2162 #if defined(HAVE_UTIMENSAT)
2163         if (ft != NULL) {
2164                 struct timespec ts[2];
2165                 ts[0] = ft->atime;
2166                 ts[1] = ft->mtime;
2167                 result = utimensat(AT_FDCWD, smb_fname->base_name, ts, 0);
2168         } else {
2169                 result = utimensat(AT_FDCWD, smb_fname->base_name, NULL, 0);
2170         }
2171         if (!((result == -1) && (errno == ENOSYS))) {
2172                 goto out;
2173         }
2174 #endif
2175 #if defined(HAVE_UTIMES)
2176         if (ft != NULL) {
2177                 struct timeval tv[2];
2178                 tv[0] = convert_timespec_to_timeval(ft->atime);
2179                 tv[1] = convert_timespec_to_timeval(ft->mtime);
2180                 result = utimes(smb_fname->base_name, tv);
2181         } else {
2182                 result = utimes(smb_fname->base_name, NULL);
2183         }
2184         if (!((result == -1) && (errno == ENOSYS))) {
2185                 goto out;
2186         }
2187 #endif
2188 #if defined(HAVE_UTIME)
2189         if (ft != NULL) {
2190                 struct utimbuf times;
2191                 times.actime = convert_timespec_to_time_t(ft->atime);
2192                 times.modtime = convert_timespec_to_time_t(ft->mtime);
2193                 result = utime(smb_fname->base_name, &times);
2194         } else {
2195                 result = utime(smb_fname->base_name, NULL);
2196         }
2197         if (!((result == -1) && (errno == ENOSYS))) {
2198                 goto out;
2199         }
2200 #endif
2201         errno = ENOSYS;
2202         result = -1;
2203
2204  out:
2205         END_PROFILE(syscall_ntimes);
2206         return result;
2207 }
2208
2209 /*********************************************************************
2210  A version of ftruncate that will write the space on disk if strict
2211  allocate is set.
2212 **********************************************************************/
2213
2214 static int strict_allocate_ftruncate(vfs_handle_struct *handle, files_struct *fsp, off_t len)
2215 {
2216         off_t space_to_write;
2217         uint64_t space_avail;
2218         uint64_t bsize,dfree,dsize;
2219         int ret;
2220         NTSTATUS status;
2221         SMB_STRUCT_STAT *pst;
2222
2223         status = vfs_stat_fsp(fsp);
2224         if (!NT_STATUS_IS_OK(status)) {
2225                 return -1;
2226         }
2227         pst = &fsp->fsp_name->st;
2228
2229 #ifdef S_ISFIFO
2230         if (S_ISFIFO(pst->st_ex_mode))
2231                 return 0;
2232 #endif
2233
2234         if (pst->st_ex_size == len)
2235                 return 0;
2236
2237         /* Shrink - just ftruncate. */
2238         if (pst->st_ex_size > len)
2239                 return ftruncate(fsp->fh->fd, len);
2240
2241         space_to_write = len - pst->st_ex_size;
2242
2243         /* for allocation try fallocate first. This can fail on some
2244            platforms e.g. when the filesystem doesn't support it and no
2245            emulation is being done by the libc (like on AIX with JFS1). In that
2246            case we do our own emulation. fallocate implementations can
2247            return ENOTSUP or EINVAL in cases like that. */
2248         ret = SMB_VFS_FALLOCATE(fsp, 0, pst->st_ex_size, space_to_write);
2249         if (ret == -1 && errno == ENOSPC) {
2250                 return -1;
2251         }
2252         if (ret == 0) {
2253                 return 0;
2254         }
2255         DEBUG(10,("strict_allocate_ftruncate: SMB_VFS_FALLOCATE failed with "
2256                 "error %d. Falling back to slow manual allocation\n", errno));
2257
2258         /* available disk space is enough or not? */
2259         space_avail =
2260             get_dfree_info(fsp->conn, fsp->fsp_name, &bsize, &dfree, &dsize);
2261         /* space_avail is 1k blocks */
2262         if (space_avail == (uint64_t)-1 ||
2263                         ((uint64_t)space_to_write/1024 > space_avail) ) {
2264                 errno = ENOSPC;
2265                 return -1;
2266         }
2267
2268         /* Write out the real space on disk. */
2269         ret = vfs_slow_fallocate(fsp, pst->st_ex_size, space_to_write);
2270         if (ret != 0) {
2271                 return -1;
2272         }
2273
2274         return 0;
2275 }
2276
2277 static int vfswrap_ftruncate(vfs_handle_struct *handle, files_struct *fsp, off_t len)
2278 {
2279         int result = -1;
2280         SMB_STRUCT_STAT *pst;
2281         NTSTATUS status;
2282         char c = 0;
2283
2284         START_PROFILE(syscall_ftruncate);
2285
2286         if (lp_strict_allocate(SNUM(fsp->conn)) && !fsp->is_sparse) {
2287                 result = strict_allocate_ftruncate(handle, fsp, len);
2288                 END_PROFILE(syscall_ftruncate);
2289                 return result;
2290         }
2291
2292         /* we used to just check HAVE_FTRUNCATE_EXTEND and only use
2293            ftruncate if the system supports it. Then I discovered that
2294            you can have some filesystems that support ftruncate
2295            expansion and some that don't! On Linux fat can't do
2296            ftruncate extend but ext2 can. */
2297
2298         result = ftruncate(fsp->fh->fd, len);
2299
2300         /* According to W. R. Stevens advanced UNIX prog. Pure 4.3 BSD cannot
2301            extend a file with ftruncate. Provide alternate implementation
2302            for this */
2303
2304         /* Do an fstat to see if the file is longer than the requested
2305            size in which case the ftruncate above should have
2306            succeeded or shorter, in which case seek to len - 1 and
2307            write 1 byte of zero */
2308         status = vfs_stat_fsp(fsp);
2309         if (!NT_STATUS_IS_OK(status)) {
2310                 goto done;
2311         }
2312
2313         /* We need to update the files_struct after successful ftruncate */
2314         if (result == 0) {
2315                 goto done;
2316         }
2317
2318         pst = &fsp->fsp_name->st;
2319
2320 #ifdef S_ISFIFO
2321         if (S_ISFIFO(pst->st_ex_mode)) {
2322                 result = 0;
2323                 goto done;
2324         }
2325 #endif
2326
2327         if (pst->st_ex_size == len) {
2328                 result = 0;
2329                 goto done;
2330         }
2331
2332         if (pst->st_ex_size > len) {
2333                 /* the ftruncate should have worked */
2334                 goto done;
2335         }
2336
2337         if (SMB_VFS_PWRITE(fsp, &c, 1, len-1)!=1) {
2338                 goto done;
2339         }
2340
2341         result = 0;
2342
2343   done:
2344
2345         END_PROFILE(syscall_ftruncate);
2346         return result;
2347 }
2348
2349 static int vfswrap_fallocate(vfs_handle_struct *handle,
2350                         files_struct *fsp,
2351                         uint32_t mode,
2352                         off_t offset,
2353                         off_t len)
2354 {
2355         int result;
2356
2357         START_PROFILE(syscall_fallocate);
2358         if (mode == 0) {
2359                 result = sys_posix_fallocate(fsp->fh->fd, offset, len);
2360                 /*
2361                  * posix_fallocate returns 0 on success, errno on error
2362                  * and doesn't set errno. Make it behave like fallocate()
2363                  * which returns -1, and sets errno on failure.
2364                  */
2365                 if (result != 0) {
2366                         errno = result;
2367                         result = -1;
2368                 }
2369         } else {
2370                 /* sys_fallocate handles filtering of unsupported mode flags */
2371                 result = sys_fallocate(fsp->fh->fd, mode, offset, len);
2372         }
2373         END_PROFILE(syscall_fallocate);
2374         return result;
2375 }
2376
2377 static bool vfswrap_lock(vfs_handle_struct *handle, files_struct *fsp, int op, off_t offset, off_t count, int type)
2378 {
2379         bool result;
2380
2381         START_PROFILE(syscall_fcntl_lock);
2382
2383         if (fsp->use_ofd_locks || !lp_parm_bool(SNUM(fsp->conn),
2384                                                 "smbd",
2385                                                 "force process locks",
2386                                                 false)) {
2387                 op = map_process_lock_to_ofd_lock(op, &fsp->use_ofd_locks);
2388         }
2389
2390         result =  fcntl_lock(fsp->fh->fd, op, offset, count, type);
2391         END_PROFILE(syscall_fcntl_lock);
2392         return result;
2393 }
2394
2395 static int vfswrap_kernel_flock(vfs_handle_struct *handle, files_struct *fsp,
2396                                 uint32_t share_mode, uint32_t access_mask)
2397 {
2398         START_PROFILE(syscall_kernel_flock);
2399         kernel_flock(fsp->fh->fd, share_mode, access_mask);
2400         END_PROFILE(syscall_kernel_flock);
2401         return 0;
2402 }
2403
2404 static bool vfswrap_getlock(vfs_handle_struct *handle, files_struct *fsp, off_t *poffset, off_t *pcount, int *ptype, pid_t *ppid)
2405 {
2406         bool result;
2407         int op = F_GETLK;
2408
2409         START_PROFILE(syscall_fcntl_getlock);
2410
2411         if (fsp->use_ofd_locks || !lp_parm_bool(SNUM(fsp->conn),
2412                                                 "smbd",
2413                                                 "force process locks",
2414                                                 false)) {
2415                 op = map_process_lock_to_ofd_lock(op, &fsp->use_ofd_locks);
2416         }
2417
2418         result = fcntl_getlock(fsp->fh->fd, op, poffset, pcount, ptype, ppid);
2419         END_PROFILE(syscall_fcntl_getlock);
2420         return result;
2421 }
2422
2423 static int vfswrap_linux_setlease(vfs_handle_struct *handle, files_struct *fsp,
2424                                 int leasetype)
2425 {
2426         int result = -1;
2427
2428         START_PROFILE(syscall_linux_setlease);
2429
2430 #ifdef HAVE_KERNEL_OPLOCKS_LINUX
2431         result = linux_setlease(fsp->fh->fd, leasetype);
2432 #else
2433         errno = ENOSYS;
2434 #endif
2435         END_PROFILE(syscall_linux_setlease);
2436         return result;
2437 }
2438
2439 static int vfswrap_symlink(vfs_handle_struct *handle,
2440                         const char *link_target,
2441                         const struct smb_filename *new_smb_fname)
2442 {
2443         int result;
2444
2445         START_PROFILE(syscall_symlink);
2446         result = symlink(link_target, new_smb_fname->base_name);
2447         END_PROFILE(syscall_symlink);
2448         return result;
2449 }
2450
2451 static int vfswrap_readlink(vfs_handle_struct *handle,
2452                         const struct smb_filename *smb_fname,
2453                         char *buf,
2454                         size_t bufsiz)
2455 {
2456         int result;
2457
2458         START_PROFILE(syscall_readlink);
2459         result = readlink(smb_fname->base_name, buf, bufsiz);
2460         END_PROFILE(syscall_readlink);
2461         return result;
2462 }
2463
2464 static int vfswrap_link(vfs_handle_struct *handle,
2465                         const struct smb_filename *old_smb_fname,
2466                         const struct smb_filename *new_smb_fname)
2467 {
2468         int result;
2469
2470         START_PROFILE(syscall_link);
2471         result = link(old_smb_fname->base_name, new_smb_fname->base_name);
2472         END_PROFILE(syscall_link);
2473         return result;
2474 }
2475
2476 static int vfswrap_mknod(vfs_handle_struct *handle,
2477                         const struct smb_filename *smb_fname,
2478                         mode_t mode,
2479                         SMB_DEV_T dev)
2480 {
2481         int result;
2482
2483         START_PROFILE(syscall_mknod);
2484         result = sys_mknod(smb_fname->base_name, mode, dev);
2485         END_PROFILE(syscall_mknod);
2486         return result;
2487 }
2488
2489 static struct smb_filename *vfswrap_realpath(vfs_handle_struct *handle,
2490                         TALLOC_CTX *ctx,
2491                         const struct smb_filename *smb_fname)
2492 {
2493         char *result;
2494         struct smb_filename *result_fname = NULL;
2495
2496         START_PROFILE(syscall_realpath);
2497         result = sys_realpath(smb_fname->base_name);
2498         END_PROFILE(syscall_realpath);
2499         if (result) {
2500                 result_fname = synthetic_smb_fname(ctx, result, NULL, NULL, 0);
2501                 SAFE_FREE(result);
2502         }
2503         return result_fname;
2504 }
2505
2506 static int vfswrap_chflags(vfs_handle_struct *handle,
2507                         const struct smb_filename *smb_fname,
2508                         unsigned int flags)
2509 {
2510 #ifdef HAVE_CHFLAGS
2511         return chflags(smb_fname->base_name, flags);
2512 #else
2513         errno = ENOSYS;
2514         return -1;
2515 #endif
2516 }
2517
2518 static struct file_id vfswrap_file_id_create(struct vfs_handle_struct *handle,
2519                                              const SMB_STRUCT_STAT *sbuf)
2520 {
2521         struct file_id key;
2522
2523         /* the ZERO_STRUCT ensures padding doesn't break using the key as a
2524          * blob */
2525         ZERO_STRUCT(key);
2526
2527         key.devid = sbuf->st_ex_dev;
2528         key.inode = sbuf->st_ex_ino;
2529         /* key.extid is unused by default. */
2530
2531         return key;
2532 }
2533
2534 static NTSTATUS vfswrap_streaminfo(vfs_handle_struct *handle,
2535                                    struct files_struct *fsp,
2536                                    const struct smb_filename *smb_fname,
2537                                    TALLOC_CTX *mem_ctx,
2538                                    unsigned int *pnum_streams,
2539                                    struct stream_struct **pstreams)
2540 {
2541         SMB_STRUCT_STAT sbuf;
2542         struct stream_struct *tmp_streams = NULL;
2543         int ret;
2544
2545         if ((fsp != NULL) && (fsp->is_directory)) {
2546                 /*
2547                  * No default streams on directories
2548                  */
2549                 goto done;
2550         }
2551
2552         if ((fsp != NULL) && (fsp->fh->fd != -1)) {
2553                 ret = SMB_VFS_FSTAT(fsp, &sbuf);
2554         }
2555         else {
2556                 struct smb_filename smb_fname_cp;
2557
2558                 ZERO_STRUCT(smb_fname_cp);
2559                 smb_fname_cp.base_name = discard_const_p(char,
2560                                         smb_fname->base_name);
2561                 smb_fname_cp.flags = smb_fname->flags;
2562
2563                 if (smb_fname_cp.flags & SMB_FILENAME_POSIX_PATH) {
2564                         ret = SMB_VFS_LSTAT(handle->conn, &smb_fname_cp);
2565                 } else {
2566                         ret = SMB_VFS_STAT(handle->conn, &smb_fname_cp);
2567                 }
2568                 sbuf = smb_fname_cp.st;
2569         }
2570
2571         if (ret == -1) {
2572                 return map_nt_error_from_unix(errno);
2573         }
2574
2575         if (S_ISDIR(sbuf.st_ex_mode)) {
2576                 goto done;
2577         }
2578
2579         tmp_streams = talloc_realloc(mem_ctx, *pstreams, struct stream_struct,
2580                                         (*pnum_streams) + 1);
2581         if (tmp_streams == NULL) {
2582                 return NT_STATUS_NO_MEMORY;
2583         }
2584         tmp_streams[*pnum_streams].name = talloc_strdup(tmp_streams, "::$DATA");
2585         if (tmp_streams[*pnum_streams].name == NULL) {
2586                 return NT_STATUS_NO_MEMORY;
2587         }
2588         tmp_streams[*pnum_streams].size = sbuf.st_ex_size;
2589         tmp_streams[*pnum_streams].alloc_size = SMB_VFS_GET_ALLOC_SIZE(handle->conn, fsp, &sbuf);
2590
2591         *pnum_streams += 1;
2592         *pstreams = tmp_streams;
2593  done:
2594         return NT_STATUS_OK;
2595 }
2596
2597 static int vfswrap_get_real_filename(struct vfs_handle_struct *handle,
2598                                      const char *path,
2599                                      const char *name,
2600                                      TALLOC_CTX *mem_ctx,
2601                                      char **found_name)
2602 {
2603         /*
2604          * Don't fall back to get_real_filename so callers can differentiate
2605          * between a full directory scan and an actual case-insensitive stat.
2606          */
2607         errno = EOPNOTSUPP;
2608         return -1;
2609 }
2610
2611 static const char *vfswrap_connectpath(struct vfs_handle_struct *handle,
2612                                    const struct smb_filename *smb_fname)
2613 {
2614         return handle->conn->connectpath;
2615 }
2616
2617 static NTSTATUS vfswrap_brl_lock_windows(struct vfs_handle_struct *handle,
2618                                          struct byte_range_lock *br_lck,
2619                                          struct lock_struct *plock,
2620                                          bool blocking_lock)
2621 {
2622         SMB_ASSERT(plock->lock_flav == WINDOWS_LOCK);
2623
2624         /* Note: blr is not used in the default implementation. */
2625         return brl_lock_windows_default(br_lck, plock, blocking_lock);
2626 }
2627
2628 static bool vfswrap_brl_unlock_windows(struct vfs_handle_struct *handle,
2629                                        struct messaging_context *msg_ctx,
2630                                        struct byte_range_lock *br_lck,
2631                                        const struct lock_struct *plock)
2632 {
2633         SMB_ASSERT(plock->lock_flav == WINDOWS_LOCK);
2634
2635         return brl_unlock_windows_default(msg_ctx, br_lck, plock);
2636 }
2637
2638 static bool vfswrap_brl_cancel_windows(struct vfs_handle_struct *handle,
2639                                        struct byte_range_lock *br_lck,
2640                                        struct lock_struct *plock)
2641 {
2642         SMB_ASSERT(plock->lock_flav == WINDOWS_LOCK);
2643
2644         /* Note: blr is not used in the default implementation. */
2645         return brl_lock_cancel_default(br_lck, plock);
2646 }
2647
2648 static bool vfswrap_strict_lock_check(struct vfs_handle_struct *handle,
2649                                       files_struct *fsp,
2650                                       struct lock_struct *plock)
2651 {
2652         SMB_ASSERT(plock->lock_type == READ_LOCK ||
2653             plock->lock_type == WRITE_LOCK);
2654
2655         return strict_lock_check_default(fsp, plock);
2656 }
2657
2658 /* NT ACL operations. */
2659
2660 static NTSTATUS vfswrap_fget_nt_acl(vfs_handle_struct *handle,
2661                                     files_struct *fsp,
2662                                     uint32_t security_info,
2663                                     TALLOC_CTX *mem_ctx,
2664                                     struct security_descriptor **ppdesc)
2665 {
2666         NTSTATUS result;
2667
2668         START_PROFILE(fget_nt_acl);
2669         result = posix_fget_nt_acl(fsp, security_info,
2670                                    mem_ctx, ppdesc);
2671         END_PROFILE(fget_nt_acl);
2672         return result;
2673 }
2674
2675 static NTSTATUS vfswrap_get_nt_acl(vfs_handle_struct *handle,
2676                                    const struct smb_filename *smb_fname,
2677                                    uint32_t security_info,
2678                                    TALLOC_CTX *mem_ctx,
2679                                    struct security_descriptor **ppdesc)
2680 {
2681         NTSTATUS result;
2682
2683         START_PROFILE(get_nt_acl);
2684         result = posix_get_nt_acl(handle->conn,
2685                                 smb_fname,
2686                                 security_info,
2687                                 mem_ctx,
2688                                 ppdesc);
2689         END_PROFILE(get_nt_acl);
2690         return result;
2691 }
2692
2693 static NTSTATUS vfswrap_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp, uint32_t security_info_sent, const struct security_descriptor *psd)
2694 {
2695         NTSTATUS result;
2696
2697         START_PROFILE(fset_nt_acl);
2698         result = set_nt_acl(fsp, security_info_sent, psd);
2699         END_PROFILE(fset_nt_acl);
2700         return result;
2701 }
2702
2703 static NTSTATUS vfswrap_audit_file(struct vfs_handle_struct *handle,
2704                                    struct smb_filename *file,
2705                                    struct security_acl *sacl,
2706                                    uint32_t access_requested,
2707                                    uint32_t access_denied)
2708 {
2709         return NT_STATUS_OK; /* Nothing to do here ... */
2710 }
2711
2712 static SMB_ACL_T vfswrap_sys_acl_get_file(vfs_handle_struct *handle,
2713                                           const struct smb_filename *smb_fname,
2714                                           SMB_ACL_TYPE_T type,
2715                                           TALLOC_CTX *mem_ctx)
2716 {
2717         return sys_acl_get_file(handle, smb_fname, type, mem_ctx);
2718 }
2719
2720 static SMB_ACL_T vfswrap_sys_acl_get_fd(vfs_handle_struct *handle,
2721                                         files_struct *fsp,
2722                                         TALLOC_CTX *mem_ctx)
2723 {
2724         return sys_acl_get_fd(handle, fsp, mem_ctx);
2725 }
2726
2727 static int vfswrap_sys_acl_set_file(vfs_handle_struct *handle,
2728                                 const struct smb_filename *smb_fname,
2729                                 SMB_ACL_TYPE_T acltype,
2730                                 SMB_ACL_T theacl)
2731 {
2732         return sys_acl_set_file(handle, smb_fname, acltype, theacl);
2733 }
2734
2735 static int vfswrap_sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp, SMB_ACL_T theacl)
2736 {
2737         return sys_acl_set_fd(handle, fsp, theacl);
2738 }
2739
2740 static int vfswrap_sys_acl_delete_def_file(vfs_handle_struct *handle,
2741                         const struct smb_filename *smb_fname)
2742 {
2743         return sys_acl_delete_def_file(handle, smb_fname);
2744 }
2745
2746 /****************************************************************
2747  Extended attribute operations.
2748 *****************************************************************/
2749
2750 static ssize_t vfswrap_getxattr(struct vfs_handle_struct *handle,
2751                         const struct smb_filename *smb_fname,
2752                         const char *name,
2753                         void *value,
2754                         size_t size)
2755 {
2756         return getxattr(smb_fname->base_name, name, value, size);
2757 }
2758
2759 static ssize_t vfswrap_fgetxattr(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name, void *value, size_t size)
2760 {
2761         return fgetxattr(fsp->fh->fd, name, value, size);
2762 }
2763
2764 static ssize_t vfswrap_listxattr(struct vfs_handle_struct *handle,
2765                         const struct smb_filename *smb_fname,
2766                         char *list,
2767                         size_t size)
2768 {
2769         return listxattr(smb_fname->base_name, list, size);
2770 }
2771
2772 static ssize_t vfswrap_flistxattr(struct vfs_handle_struct *handle, struct files_struct *fsp, char *list, size_t size)
2773 {
2774         return flistxattr(fsp->fh->fd, list, size);
2775 }
2776
2777 static int vfswrap_removexattr(struct vfs_handle_struct *handle,
2778                                 const struct smb_filename *smb_fname,
2779                                 const char *name)
2780 {
2781         return removexattr(smb_fname->base_name, name);
2782 }
2783
2784 static int vfswrap_fremovexattr(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name)
2785 {
2786         return fremovexattr(fsp->fh->fd, name);
2787 }
2788
2789 static int vfswrap_setxattr(struct vfs_handle_struct *handle,
2790                                 const struct smb_filename *smb_fname,
2791                                 const char *name,
2792                                 const void *value,
2793                                 size_t size,
2794                                 int flags)
2795 {
2796         return setxattr(smb_fname->base_name, name, value, size, flags);
2797 }
2798
2799 static int vfswrap_fsetxattr(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name, const void *value, size_t size, int flags)
2800 {
2801         return fsetxattr(fsp->fh->fd, name, value, size, flags);
2802 }
2803
2804 static bool vfswrap_aio_force(struct vfs_handle_struct *handle, struct files_struct *fsp)
2805 {
2806         return false;
2807 }
2808
2809 static bool vfswrap_is_offline(struct vfs_handle_struct *handle,
2810                                const struct smb_filename *fname,
2811                                SMB_STRUCT_STAT *sbuf)
2812 {
2813         NTSTATUS status;
2814         char *path;
2815         bool offline = false;
2816
2817         if (ISDOT(fname->base_name) || ISDOTDOT(fname->base_name)) {
2818                 return false;
2819         }
2820
2821         if (!lp_dmapi_support(SNUM(handle->conn)) || !dmapi_have_session()) {
2822 #if defined(ENOTSUP)
2823                 errno = ENOTSUP;
2824 #endif
2825                 return false;
2826         }
2827
2828         status = get_full_smb_filename(talloc_tos(), fname, &path);
2829         if (!NT_STATUS_IS_OK(status)) {
2830                 errno = map_errno_from_nt_status(status);
2831                 return false;
2832         }
2833
2834         offline = (dmapi_file_flags(path) & FILE_ATTRIBUTE_OFFLINE) != 0;
2835
2836         TALLOC_FREE(path);
2837
2838         return offline;
2839 }
2840
2841 static NTSTATUS vfswrap_durable_cookie(struct vfs_handle_struct *handle,
2842                                        struct files_struct *fsp,
2843                                        TALLOC_CTX *mem_ctx,
2844                                        DATA_BLOB *cookie)
2845 {
2846         return vfs_default_durable_cookie(fsp, mem_ctx, cookie);
2847 }
2848
2849 static NTSTATUS vfswrap_durable_disconnect(struct vfs_handle_struct *handle,
2850                                            struct files_struct *fsp,
2851                                            const DATA_BLOB old_cookie,
2852                                            TALLOC_CTX *mem_ctx,
2853                                            DATA_BLOB *new_cookie)
2854 {
2855         return vfs_default_durable_disconnect(fsp, old_cookie, mem_ctx,
2856                                               new_cookie);
2857 }
2858
2859 static NTSTATUS vfswrap_durable_reconnect(struct vfs_handle_struct *handle,
2860                                           struct smb_request *smb1req,
2861                                           struct smbXsrv_open *op,
2862                                           const DATA_BLOB old_cookie,
2863                                           TALLOC_CTX *mem_ctx,
2864                                           struct files_struct **fsp,
2865                                           DATA_BLOB *new_cookie)
2866 {
2867         return vfs_default_durable_reconnect(handle->conn, smb1req, op,
2868                                              old_cookie, mem_ctx,
2869                                              fsp, new_cookie);
2870 }
2871
2872 static struct vfs_fn_pointers vfs_default_fns = {
2873         /* Disk operations */
2874
2875         .connect_fn = vfswrap_connect,
2876         .disconnect_fn = vfswrap_disconnect,
2877         .disk_free_fn = vfswrap_disk_free,
2878         .get_quota_fn = vfswrap_get_quota,
2879         .set_quota_fn = vfswrap_set_quota,
2880         .get_shadow_copy_data_fn = vfswrap_get_shadow_copy_data,
2881         .statvfs_fn = vfswrap_statvfs,
2882         .fs_capabilities_fn = vfswrap_fs_capabilities,
2883         .get_dfs_referrals_fn = vfswrap_get_dfs_referrals,
2884         .snap_check_path_fn = vfswrap_snap_check_path,
2885         .snap_create_fn = vfswrap_snap_create,
2886         .snap_delete_fn = vfswrap_snap_delete,
2887
2888         /* Directory operations */
2889
2890         .opendir_fn = vfswrap_opendir,
2891         .fdopendir_fn = vfswrap_fdopendir,
2892         .readdir_fn = vfswrap_readdir,
2893         .readdir_attr_fn = vfswrap_readdir_attr,
2894         .seekdir_fn = vfswrap_seekdir,
2895         .telldir_fn = vfswrap_telldir,
2896         .rewind_dir_fn = vfswrap_rewinddir,
2897         .mkdir_fn = vfswrap_mkdir,
2898         .rmdir_fn = vfswrap_rmdir,
2899         .closedir_fn = vfswrap_closedir,
2900
2901         /* File operations */
2902
2903         .open_fn = vfswrap_open,
2904         .create_file_fn = vfswrap_create_file,
2905         .close_fn = vfswrap_close,
2906         .pread_fn = vfswrap_pread,
2907         .pread_send_fn = vfswrap_pread_send,
2908         .pread_recv_fn = vfswrap_pread_recv,
2909         .pwrite_fn = vfswrap_pwrite,
2910         .pwrite_send_fn = vfswrap_pwrite_send,
2911         .pwrite_recv_fn = vfswrap_pwrite_recv,
2912         .lseek_fn = vfswrap_lseek,
2913         .sendfile_fn = vfswrap_sendfile,
2914         .recvfile_fn = vfswrap_recvfile,
2915         .rename_fn = vfswrap_rename,
2916         .fsync_send_fn = vfswrap_fsync_send,
2917         .fsync_recv_fn = vfswrap_fsync_recv,
2918         .stat_fn = vfswrap_stat,
2919         .fstat_fn = vfswrap_fstat,
2920         .lstat_fn = vfswrap_lstat,
2921         .get_alloc_size_fn = vfswrap_get_alloc_size,
2922         .unlink_fn = vfswrap_unlink,
2923         .chmod_fn = vfswrap_chmod,
2924         .fchmod_fn = vfswrap_fchmod,
2925         .chown_fn = vfswrap_chown,
2926         .fchown_fn = vfswrap_fchown,
2927         .lchown_fn = vfswrap_lchown,
2928         .chdir_fn = vfswrap_chdir,
2929         .getwd_fn = vfswrap_getwd,
2930         .ntimes_fn = vfswrap_ntimes,
2931         .ftruncate_fn = vfswrap_ftruncate,
2932         .fallocate_fn = vfswrap_fallocate,
2933         .lock_fn = vfswrap_lock,
2934         .kernel_flock_fn = vfswrap_kernel_flock,
2935         .linux_setlease_fn = vfswrap_linux_setlease,
2936         .getlock_fn = vfswrap_getlock,
2937         .symlink_fn = vfswrap_symlink,
2938         .readlink_fn = vfswrap_readlink,
2939         .link_fn = vfswrap_link,
2940         .mknod_fn = vfswrap_mknod,
2941         .realpath_fn = vfswrap_realpath,
2942         .chflags_fn = vfswrap_chflags,
2943         .file_id_create_fn = vfswrap_file_id_create,
2944         .streaminfo_fn = vfswrap_streaminfo,
2945         .get_real_filename_fn = vfswrap_get_real_filename,
2946         .connectpath_fn = vfswrap_connectpath,
2947         .brl_lock_windows_fn = vfswrap_brl_lock_windows,
2948         .brl_unlock_windows_fn = vfswrap_brl_unlock_windows,
2949         .brl_cancel_windows_fn = vfswrap_brl_cancel_windows,
2950         .strict_lock_check_fn = vfswrap_strict_lock_check,
2951         .translate_name_fn = vfswrap_translate_name,
2952         .fsctl_fn = vfswrap_fsctl,
2953         .set_dos_attributes_fn = vfswrap_set_dos_attributes,
2954         .fset_dos_attributes_fn = vfswrap_fset_dos_attributes,
2955         .get_dos_attributes_fn = vfswrap_get_dos_attributes,
2956         .fget_dos_attributes_fn = vfswrap_fget_dos_attributes,
2957         .offload_read_send_fn = vfswrap_offload_read_send,
2958         .offload_read_recv_fn = vfswrap_offload_read_recv,
2959         .offload_write_send_fn = vfswrap_offload_write_send,
2960         .offload_write_recv_fn = vfswrap_offload_write_recv,
2961         .get_compression_fn = vfswrap_get_compression,
2962         .set_compression_fn = vfswrap_set_compression,
2963
2964         /* NT ACL operations. */
2965
2966         .fget_nt_acl_fn = vfswrap_fget_nt_acl,
2967         .get_nt_acl_fn = vfswrap_get_nt_acl,
2968         .fset_nt_acl_fn = vfswrap_fset_nt_acl,
2969         .audit_file_fn = vfswrap_audit_file,
2970
2971         /* POSIX ACL operations. */
2972
2973         .sys_acl_get_file_fn = vfswrap_sys_acl_get_file,
2974         .sys_acl_get_fd_fn = vfswrap_sys_acl_get_fd,
2975         .sys_acl_blob_get_file_fn = posix_sys_acl_blob_get_file,
2976         .sys_acl_blob_get_fd_fn = posix_sys_acl_blob_get_fd,
2977         .sys_acl_set_file_fn = vfswrap_sys_acl_set_file,
2978         .sys_acl_set_fd_fn = vfswrap_sys_acl_set_fd,
2979         .sys_acl_delete_def_file_fn = vfswrap_sys_acl_delete_def_file,
2980
2981         /* EA operations. */
2982         .getxattr_fn = vfswrap_getxattr,
2983         .fgetxattr_fn = vfswrap_fgetxattr,
2984         .listxattr_fn = vfswrap_listxattr,
2985         .flistxattr_fn = vfswrap_flistxattr,
2986         .removexattr_fn = vfswrap_removexattr,
2987         .fremovexattr_fn = vfswrap_fremovexattr,
2988         .setxattr_fn = vfswrap_setxattr,
2989         .fsetxattr_fn = vfswrap_fsetxattr,
2990
2991         /* aio operations */
2992         .aio_force_fn = vfswrap_aio_force,
2993
2994         /* durable handle operations */
2995         .durable_cookie_fn = vfswrap_durable_cookie,
2996         .durable_disconnect_fn = vfswrap_durable_disconnect,
2997         .durable_reconnect_fn = vfswrap_durable_reconnect,
2998 };
2999
3000 static_decl_vfs;
3001 NTSTATUS vfs_default_init(TALLOC_CTX *ctx)
3002 {
3003         /*
3004          * Here we need to implement every call!
3005          *
3006          * As this is the end of the vfs module chain.
3007          */
3008         smb_vfs_assert_all_fns(&vfs_default_fns, DEFAULT_VFS_MODULE_NAME);
3009         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
3010                                 DEFAULT_VFS_MODULE_NAME, &vfs_default_fns);
3011 }
3012
3013