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 (ret != 0) {
 746                 if (ret != EAGAIN) {
 747                         tevent_req_error(req, ret);
 748                         return;
 749                 }
 750                 /*
 751                  * If we get EAGAIN from pthreadpool_tevent_job_recv() this
 752                  * means the lower level pthreadpool failed to create a new
 753                  * thread. Fallback to sync processing in that case to allow
 754                  * some progress for the client.
 755                  */
 756                 vfs_pread_do(state);
 757         }
 758
 759         tevent_req_done(req);
 760 }
 761
 762 static ssize_t vfswrap_pread_recv(struct tevent_req *req,
 763                                   struct vfs_aio_state *vfs_aio_state)
 764 {
 765         struct vfswrap_pread_state *state = tevent_req_data(
 766                 req, struct vfswrap_pread_state);
 767
 768         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
 769                 return -1;
 770         }
 771
 772         *vfs_aio_state = state->vfs_aio_state;
 773         return state->ret;
 774 }
 775
 776 struct vfswrap_pwrite_state {
 777         ssize_t ret;
 778         int fd;
 779         const void *buf;
 780         size_t count;
 781         off_t offset;
 782
 783         struct vfs_aio_state vfs_aio_state;
 784         SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
 785 };
 786
 787 static void vfs_pwrite_do(void *private_data);
 788 static void vfs_pwrite_done(struct tevent_req *subreq);
 789 static int vfs_pwrite_state_destructor(struct vfswrap_pwrite_state *state);
 790
 791 static struct tevent_req *vfswrap_pwrite_send(struct vfs_handle_struct *handle,
 792                                               TALLOC_CTX *mem_ctx,
 793                                               struct tevent_context *ev,
 794                                               struct files_struct *fsp,
 795                                               const void *data,
 796                                               size_t n, off_t offset)
 797 {
 798         struct tevent_req *req, *subreq;
 799         struct vfswrap_pwrite_state *state;
 800
 801         req = tevent_req_create(mem_ctx, &state, struct vfswrap_pwrite_state);
 802         if (req == NULL) {
 803                 return NULL;
 804         }
 805
 806         state->ret = -1;
 807         state->fd = fsp->fh->fd;
 808         state->buf = data;
 809         state->count = n;
 810         state->offset = offset;
 811
 812         SMBPROFILE_BYTES_ASYNC_START(syscall_asys_pwrite, profile_p,
 813                                      state->profile_bytes, n);
 814         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
 815
 816         subreq = pthreadpool_tevent_job_send(
 817                 state, ev, handle->conn->sconn->pool,
 818                 vfs_pwrite_do, state);
 819         if (tevent_req_nomem(subreq, req)) {
 820                 return tevent_req_post(req, ev);
 821         }
 822         tevent_req_set_callback(subreq, vfs_pwrite_done, req);
 823
 824         talloc_set_destructor(state, vfs_pwrite_state_destructor);
 825
 826         return req;
 827 }
 828
 829 static void vfs_pwrite_do(void *private_data)
 830 {
 831         struct vfswrap_pwrite_state *state = talloc_get_type_abort(
 832                 private_data, struct vfswrap_pwrite_state);
 833         struct timespec start_time;
 834         struct timespec end_time;
 835
 836         SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
 837
 838         PROFILE_TIMESTAMP(&start_time);
 839
 840         do {
 841                 state->ret = pwrite(state->fd, state->buf, state->count,
 842                                    state->offset);
 843         } while ((state->ret == -1) && (errno == EINTR));
 844
 845         if (state->ret == -1) {
 846                 state->vfs_aio_state.error = errno;
 847         }
 848
 849         PROFILE_TIMESTAMP(&end_time);
 850
 851         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
 852
 853         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
 854 }
 855
 856 static int vfs_pwrite_state_destructor(struct vfswrap_pwrite_state *state)
 857 {
 858         return -1;
 859 }
 860
 861 static void vfs_pwrite_done(struct tevent_req *subreq)
 862 {
 863         struct tevent_req *req = tevent_req_callback_data(
 864                 subreq, struct tevent_req);
 865         struct vfswrap_pwrite_state *state = tevent_req_data(
 866                 req, struct vfswrap_pwrite_state);
 867         int ret;
 868
 869         ret = pthreadpool_tevent_job_recv(subreq);
 870         TALLOC_FREE(subreq);
 871         SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
 872         talloc_set_destructor(state, NULL);
 873         if (ret != 0) {
 874                 if (ret != EAGAIN) {
 875                         tevent_req_error(req, ret);
 876                         return;
 877                 }
 878                 /*
 879                  * If we get EAGAIN from pthreadpool_tevent_job_recv() this
 880                  * means the lower level pthreadpool failed to create a new
 881                  * thread. Fallback to sync processing in that case to allow
 882                  * some progress for the client.
 883                  */
 884                 vfs_pwrite_do(state);
 885         }
 886
 887         tevent_req_done(req);
 888 }
 889
 890 static ssize_t vfswrap_pwrite_recv(struct tevent_req *req,
 891                                    struct vfs_aio_state *vfs_aio_state)
 892 {
 893         struct vfswrap_pwrite_state *state = tevent_req_data(
 894                 req, struct vfswrap_pwrite_state);
 895
 896         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
 897                 return -1;
 898         }
 899
 900         *vfs_aio_state = state->vfs_aio_state;
 901         return state->ret;
 902 }
 903
 904 struct vfswrap_fsync_state {
 905         ssize_t ret;
 906         int fd;
 907
 908         struct vfs_aio_state vfs_aio_state;
 909         SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
 910 };
 911
 912 static void vfs_fsync_do(void *private_data);
 913 static void vfs_fsync_done(struct tevent_req *subreq);
 914 static int vfs_fsync_state_destructor(struct vfswrap_fsync_state *state);
 915
 916 static struct tevent_req *vfswrap_fsync_send(struct vfs_handle_struct *handle,
 917                                              TALLOC_CTX *mem_ctx,
 918                                              struct tevent_context *ev,
 919                                              struct files_struct *fsp)
 920 {
 921         struct tevent_req *req, *subreq;
 922         struct vfswrap_fsync_state *state;
 923
 924         req = tevent_req_create(mem_ctx, &state, struct vfswrap_fsync_state);
 925         if (req == NULL) {
 926                 return NULL;
 927         }
 928
 929         state->ret = -1;
 930         state->fd = fsp->fh->fd;
 931
 932         SMBPROFILE_BYTES_ASYNC_START(syscall_asys_fsync, profile_p,
 933                                      state->profile_bytes, 0);
 934         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
 935
 936         subreq = pthreadpool_tevent_job_send(
 937                 state, ev, handle->conn->sconn->pool, vfs_fsync_do, state);
 938         if (tevent_req_nomem(subreq, req)) {
 939                 return tevent_req_post(req, ev);
 940         }
 941         tevent_req_set_callback(subreq, vfs_fsync_done, req);
 942
 943         talloc_set_destructor(state, vfs_fsync_state_destructor);
 944
 945         return req;
 946 }
 947
 948 static void vfs_fsync_do(void *private_data)
 949 {
 950         struct vfswrap_fsync_state *state = talloc_get_type_abort(
 951                 private_data, struct vfswrap_fsync_state);
 952         struct timespec start_time;
 953         struct timespec end_time;
 954
 955         SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
 956
 957         PROFILE_TIMESTAMP(&start_time);
 958
 959         do {
 960                 state->ret = fsync(state->fd);
 961         } while ((state->ret == -1) && (errno == EINTR));
 962
 963         if (state->ret == -1) {
 964                 state->vfs_aio_state.error = errno;
 965         }
 966
 967         PROFILE_TIMESTAMP(&end_time);
 968
 969         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
 970
 971         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
 972 }
 973
 974 static int vfs_fsync_state_destructor(struct vfswrap_fsync_state *state)
 975 {
 976         return -1;
 977 }
 978
 979 static void vfs_fsync_done(struct tevent_req *subreq)
 980 {
 981         struct tevent_req *req = tevent_req_callback_data(
 982                 subreq, struct tevent_req);
 983         struct vfswrap_fsync_state *state = tevent_req_data(
 984                 req, struct vfswrap_fsync_state);
 985         int ret;
 986
 987         ret = pthreadpool_tevent_job_recv(subreq);
 988         TALLOC_FREE(subreq);
 989         SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
 990         talloc_set_destructor(state, NULL);
 991         if (ret != 0) {
 992                 if (ret != EAGAIN) {
 993                         tevent_req_error(req, ret);
 994                         return;
 995                 }
 996                 /*
 997                  * If we get EAGAIN from pthreadpool_tevent_job_recv() this
 998                  * means the lower level pthreadpool failed to create a new
 999                  * thread. Fallback to sync processing in that case to allow
1000                  * some progress for the client.
1001                  */
1002                 vfs_fsync_do(state);
1003         }
1004
1005         tevent_req_done(req);
1006 }
1007
1008 static int vfswrap_fsync_recv(struct tevent_req *req,
1009                               struct vfs_aio_state *vfs_aio_state)
1010 {
1011         struct vfswrap_fsync_state *state = tevent_req_data(
1012                 req, struct vfswrap_fsync_state);
1013
1014         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1015                 return -1;
1016         }
1017
1018         *vfs_aio_state = state->vfs_aio_state;
1019         return state->ret;
1020 }
1021
1022 static off_t vfswrap_lseek(vfs_handle_struct *handle, files_struct *fsp, off_t offset, int whence)
1023 {
1024         off_t result = 0;
1025
1026         START_PROFILE(syscall_lseek);
1027
1028         result = lseek(fsp->fh->fd, offset, whence);
1029         /*
1030          * We want to maintain the fiction that we can seek
1031          * on a fifo for file system purposes. This allows
1032          * people to set up UNIX fifo's that feed data to Windows
1033          * applications. JRA.
1034          */
1035
1036         if((result == -1) && (errno == ESPIPE)) {
1037                 result = 0;
1038                 errno = 0;
1039         }
1040
1041         END_PROFILE(syscall_lseek);
1042         return result;
1043 }
1044
1045 static ssize_t vfswrap_sendfile(vfs_handle_struct *handle, int tofd, files_struct *fromfsp, const DATA_BLOB *hdr,
1046                         off_t offset, size_t n)
1047 {
1048         ssize_t result;
1049
1050         START_PROFILE_BYTES(syscall_sendfile, n);
1051         result = sys_sendfile(tofd, fromfsp->fh->fd, hdr, offset, n);
1052         END_PROFILE_BYTES(syscall_sendfile);
1053         return result;
1054 }
1055
1056 static ssize_t vfswrap_recvfile(vfs_handle_struct *handle,
1057                         int fromfd,
1058                         files_struct *tofsp,
1059                         off_t offset,
1060                         size_t n)
1061 {
1062         ssize_t result;
1063
1064         START_PROFILE_BYTES(syscall_recvfile, n);
1065         result = sys_recvfile(fromfd, tofsp->fh->fd, offset, n);
1066         END_PROFILE_BYTES(syscall_recvfile);
1067         return result;
1068 }
1069
1070 static int vfswrap_rename(vfs_handle_struct *handle,
1071                           const struct smb_filename *smb_fname_src,
1072                           const struct smb_filename *smb_fname_dst)
1073 {
1074         int result = -1;
1075
1076         START_PROFILE(syscall_rename);
1077
1078         if (smb_fname_src->stream_name || smb_fname_dst->stream_name) {
1079                 errno = ENOENT;
1080                 goto out;
1081         }
1082
1083         result = rename(smb_fname_src->base_name, smb_fname_dst->base_name);
1084
1085  out:
1086         END_PROFILE(syscall_rename);
1087         return result;
1088 }
1089
1090 static int vfswrap_stat(vfs_handle_struct *handle,
1091                         struct smb_filename *smb_fname)
1092 {
1093         int result = -1;
1094
1095         START_PROFILE(syscall_stat);
1096
1097         if (smb_fname->stream_name) {
1098                 errno = ENOENT;
1099                 goto out;
1100         }
1101
1102         result = sys_stat(smb_fname->base_name, &smb_fname->st,
1103                           lp_fake_directory_create_times(SNUM(handle->conn)));
1104  out:
1105         END_PROFILE(syscall_stat);
1106         return result;
1107 }
1108
1109 static int vfswrap_fstat(vfs_handle_struct *handle, files_struct *fsp, SMB_STRUCT_STAT *sbuf)
1110 {
1111         int result;
1112
1113         START_PROFILE(syscall_fstat);
1114         result = sys_fstat(fsp->fh->fd,
1115                            sbuf, lp_fake_directory_create_times(SNUM(handle->conn)));
1116         END_PROFILE(syscall_fstat);
1117         return result;
1118 }
1119
1120 static int vfswrap_lstat(vfs_handle_struct *handle,
1121                          struct smb_filename *smb_fname)
1122 {
1123         int result = -1;
1124
1125         START_PROFILE(syscall_lstat);
1126
1127         if (smb_fname->stream_name) {
1128                 errno = ENOENT;
1129                 goto out;
1130         }
1131
1132         result = sys_lstat(smb_fname->base_name, &smb_fname->st,
1133                            lp_fake_directory_create_times(SNUM(handle->conn)));
1134  out:
1135         END_PROFILE(syscall_lstat);
1136         return result;
1137 }
1138
1139 static NTSTATUS vfswrap_translate_name(struct vfs_handle_struct *handle,
1140                                        const char *name,
1141                                        enum vfs_translate_direction direction,
1142                                        TALLOC_CTX *mem_ctx,
1143                                        char **mapped_name)
1144 {
1145         return NT_STATUS_NONE_MAPPED;
1146 }
1147
1148 /*
1149  * Implement the default fsctl operation.
1150  */
1151 static bool vfswrap_logged_ioctl_message = false;
1152
1153 static NTSTATUS vfswrap_fsctl(struct vfs_handle_struct *handle,
1154                               struct files_struct *fsp,
1155                               TALLOC_CTX *ctx,
1156                               uint32_t function,
1157                               uint16_t req_flags, /* Needed for UNICODE ... */
1158                               const uint8_t *_in_data,
1159                               uint32_t in_len,
1160                               uint8_t **_out_data,
1161                               uint32_t max_out_len,
1162                               uint32_t *out_len)
1163 {
1164         const char *in_data = (const char *)_in_data;
1165         char **out_data = (char **)_out_data;
1166         NTSTATUS status;
1167
1168         switch (function) {
1169         case FSCTL_SET_SPARSE:
1170         {
1171                 bool set_sparse = true;
1172
1173                 if (in_len >= 1 && in_data[0] == 0) {
1174                         set_sparse = false;
1175                 }
1176
1177                 status = file_set_sparse(handle->conn, fsp, set_sparse);
1178
1179                 DEBUG(NT_STATUS_IS_OK(status) ? 10 : 9,
1180                       ("FSCTL_SET_SPARSE: fname[%s] set[%u] - %s\n",
1181                        smb_fname_str_dbg(fsp->fsp_name), set_sparse,
1182                        nt_errstr(status)));
1183
1184                 return status;
1185         }
1186
1187         case FSCTL_CREATE_OR_GET_OBJECT_ID:
1188         {
1189                 unsigned char objid[16];
1190                 char *return_data = NULL;
1191
1192                 /* This should return the object-id on this file.
1193                  * I think I'll make this be the inode+dev. JRA.
1194                  */
1195
1196                 DEBUG(10,("FSCTL_CREATE_OR_GET_OBJECT_ID: called on %s\n",
1197                           fsp_fnum_dbg(fsp)));
1198
1199                 *out_len = MIN(max_out_len, 64);
1200
1201                 /* Hmmm, will this cause problems if less data asked for? */
1202                 return_data = talloc_array(ctx, char, 64);
1203                 if (return_data == NULL) {
1204                         return NT_STATUS_NO_MEMORY;
1205                 }
1206
1207                 /* For backwards compatibility only store the dev/inode. */
1208                 push_file_id_16(return_data, &fsp->file_id);
1209                 memcpy(return_data+16,create_volume_objectid(fsp->conn,objid),16);
1210                 push_file_id_16(return_data+32, &fsp->file_id);
1211                 memset(return_data+48, 0, 16);
1212                 *out_data = return_data;
1213                 return NT_STATUS_OK;
1214         }
1215
1216         case FSCTL_GET_REPARSE_POINT:
1217         {
1218                 /* Fail it with STATUS_NOT_A_REPARSE_POINT */
1219                 DEBUG(10, ("FSCTL_GET_REPARSE_POINT: called on %s. "
1220                            "Status: NOT_IMPLEMENTED\n", fsp_fnum_dbg(fsp)));
1221                 return NT_STATUS_NOT_A_REPARSE_POINT;
1222         }
1223
1224         case FSCTL_SET_REPARSE_POINT:
1225         {
1226                 /* Fail it with STATUS_NOT_A_REPARSE_POINT */
1227                 DEBUG(10, ("FSCTL_SET_REPARSE_POINT: called on %s. "
1228                            "Status: NOT_IMPLEMENTED\n", fsp_fnum_dbg(fsp)));
1229                 return NT_STATUS_NOT_A_REPARSE_POINT;
1230         }
1231
1232         case FSCTL_GET_SHADOW_COPY_DATA:
1233         {
1234                 /*
1235                  * This is called to retrieve the number of Shadow Copies (a.k.a. snapshots)
1236                  * and return their volume names.  If max_data_count is 16, then it is just
1237                  * asking for the number of volumes and length of the combined names.
1238                  *
1239                  * pdata is the data allocated by our caller, but that uses
1240                  * total_data_count (which is 0 in our case) rather than max_data_count.
1241                  * Allocate the correct amount and return the pointer to let
1242                  * it be deallocated when we return.
1243                  */
1244                 struct shadow_copy_data *shadow_data = NULL;
1245                 bool labels = False;
1246                 uint32_t labels_data_count = 0;
1247                 uint32_t i;
1248                 char *cur_pdata = NULL;
1249
1250                 if (max_out_len < 16) {
1251                         DEBUG(0,("FSCTL_GET_SHADOW_COPY_DATA: max_data_count(%u) < 16 is invalid!\n",
1252                                 max_out_len));
1253                         return NT_STATUS_INVALID_PARAMETER;
1254                 }
1255
1256                 if (max_out_len > 16) {
1257                         labels = True;
1258                 }
1259
1260                 shadow_data = talloc_zero(ctx, struct shadow_copy_data);
1261                 if (shadow_data == NULL) {
1262                         DEBUG(0,("TALLOC_ZERO() failed!\n"));
1263                         return NT_STATUS_NO_MEMORY;
1264                 }
1265
1266                 /*
1267                  * Call the VFS routine to actually do the work.
1268                  */
1269                 if (SMB_VFS_GET_SHADOW_COPY_DATA(fsp, shadow_data, labels)!=0) {
1270                         int log_lev = 0;
1271                         if (errno == 0) {
1272                                 /* broken module didn't set errno on error */
1273                                 status = NT_STATUS_UNSUCCESSFUL;
1274                         } else {
1275                                 status = map_nt_error_from_unix(errno);
1276                                 if (NT_STATUS_EQUAL(status,
1277                                                     NT_STATUS_NOT_SUPPORTED)) {
1278                                         log_lev = 5;
1279                                 }
1280                         }
1281                         DEBUG(log_lev, ("FSCTL_GET_SHADOW_COPY_DATA: "
1282                                         "connectpath %s, failed - %s.\n",
1283                                         fsp->conn->connectpath,
1284                                         nt_errstr(status)));
1285                         TALLOC_FREE(shadow_data);
1286                         return status;
1287                 }
1288
1289                 labels_data_count = (shadow_data->num_volumes * 2 *
1290                                         sizeof(SHADOW_COPY_LABEL)) + 2;
1291
1292                 if (!labels) {
1293                         *out_len = 16;
1294                 } else {
1295                         *out_len = 12 + labels_data_count;
1296                 }
1297
1298                 if (max_out_len < *out_len) {
1299                         DEBUG(0,("FSCTL_GET_SHADOW_COPY_DATA: max_data_count(%u) too small (%u) bytes needed!\n",
1300                                 max_out_len, *out_len));
1301                         TALLOC_FREE(shadow_data);
1302                         return NT_STATUS_BUFFER_TOO_SMALL;
1303                 }
1304
1305                 cur_pdata = talloc_zero_array(ctx, char, *out_len);
1306                 if (cur_pdata == NULL) {
1307                         TALLOC_FREE(shadow_data);
1308                         return NT_STATUS_NO_MEMORY;
1309                 }
1310
1311                 *out_data = cur_pdata;
1312
1313                 /* num_volumes 4 bytes */
1314                 SIVAL(cur_pdata, 0, shadow_data->num_volumes);
1315
1316                 if (labels) {
1317                         /* num_labels 4 bytes */
1318                         SIVAL(cur_pdata, 4, shadow_data->num_volumes);
1319                 }
1320
1321                 /* needed_data_count 4 bytes */
1322                 SIVAL(cur_pdata, 8, labels_data_count);
1323
1324                 cur_pdata += 12;
1325
1326                 DEBUG(10,("FSCTL_GET_SHADOW_COPY_DATA: %u volumes for path[%s].\n",
1327                           shadow_data->num_volumes, fsp_str_dbg(fsp)));
1328                 if (labels && shadow_data->labels) {
1329                         for (i=0; i<shadow_data->num_volumes; i++) {
1330                                 size_t len = 0;
1331                                 status = srvstr_push(cur_pdata, req_flags,
1332                                             cur_pdata, shadow_data->labels[i],
1333                                             2 * sizeof(SHADOW_COPY_LABEL),
1334                                             STR_UNICODE|STR_TERMINATE, &len);
1335                                 if (!NT_STATUS_IS_OK(status)) {
1336                                         TALLOC_FREE(*out_data);
1337                                         TALLOC_FREE(shadow_data);
1338                                         return status;
1339                                 }
1340                                 cur_pdata += 2 * sizeof(SHADOW_COPY_LABEL);
1341                                 DEBUGADD(10,("Label[%u]: '%s'\n",i,shadow_data->labels[i]));
1342                         }
1343                 }
1344
1345                 TALLOC_FREE(shadow_data);
1346
1347                 return NT_STATUS_OK;
1348         }
1349
1350         case FSCTL_FIND_FILES_BY_SID:
1351         {
1352                 /* pretend this succeeded -
1353                  *
1354                  * we have to send back a list with all files owned by this SID
1355                  *
1356                  * but I have to check that --metze
1357                  */
1358                 struct sid_parse_ret ret;
1359                 struct dom_sid sid;
1360                 struct dom_sid_buf buf;
1361                 uid_t uid;
1362                 size_t sid_len;
1363
1364                 DEBUG(10, ("FSCTL_FIND_FILES_BY_SID: called on %s\n",
1365                            fsp_fnum_dbg(fsp)));
1366
1367                 if (in_len < 8) {
1368                         /* NT_STATUS_BUFFER_TOO_SMALL maybe? */
1369                         return NT_STATUS_INVALID_PARAMETER;
1370                 }
1371
1372                 sid_len = MIN(in_len - 4,SID_MAX_SIZE);
1373
1374                 /* unknown 4 bytes: this is not the length of the sid :-(  */
1375                 /*unknown = IVAL(pdata,0);*/
1376
1377                 ret = sid_parse(_in_data + 4, sid_len, &sid);
1378                 if (ret.len == -1) {
1379                         return NT_STATUS_INVALID_PARAMETER;
1380                 }
1381                 DEBUGADD(10, ("for SID: %s\n",
1382                               dom_sid_str_buf(&sid, &buf)));
1383
1384                 if (!sid_to_uid(&sid, &uid)) {
1385                         DEBUG(0,("sid_to_uid: failed, sid[%s] sid_len[%lu]\n",
1386                                  dom_sid_str_buf(&sid, &buf),
1387                                  (unsigned long)sid_len));
1388                         uid = (-1);
1389                 }
1390
1391                 /* we can take a look at the find source :-)
1392                  *
1393                  * find ./ -uid $uid  -name '*'   is what we need here
1394                  *
1395                  *
1396                  * and send 4bytes len and then NULL terminated unicode strings
1397                  * for each file
1398                  *
1399                  * but I don't know how to deal with the paged results
1400                  * (maybe we can hang the result anywhere in the fsp struct)
1401                  *
1402                  * but I don't know how to deal with the paged results
1403                  * (maybe we can hang the result anywhere in the fsp struct)
1404                  *
1405                  * we don't send all files at once
1406                  * and at the next we should *not* start from the beginning,
1407                  * so we have to cache the result
1408                  *
1409                  * --metze
1410                  */
1411
1412                 /* this works for now... */
1413                 return NT_STATUS_OK;
1414         }
1415
1416         case FSCTL_QUERY_ALLOCATED_RANGES:
1417         {
1418                 /* FIXME: This is just a dummy reply, telling that all of the
1419                  * file is allocated. MKS cp needs that.
1420                  * Adding the real allocated ranges via FIEMAP on Linux
1421                  * and SEEK_DATA/SEEK_HOLE on Solaris is needed to make
1422                  * this FSCTL correct for sparse files.
1423                  */
1424                 uint64_t offset, length;
1425                 char *out_data_tmp = NULL;
1426
1427                 if (in_len != 16) {
1428                         DEBUG(0,("FSCTL_QUERY_ALLOCATED_RANGES: data_count(%u) != 16 is invalid!\n",
1429                                 in_len));
1430                         return NT_STATUS_INVALID_PARAMETER;
1431                 }
1432
1433                 if (max_out_len < 16) {
1434                         DEBUG(0,("FSCTL_QUERY_ALLOCATED_RANGES: max_out_len (%u) < 16 is invalid!\n",
1435                                 max_out_len));
1436                         return NT_STATUS_INVALID_PARAMETER;
1437                 }
1438
1439                 offset = BVAL(in_data,0);
1440                 length = BVAL(in_data,8);
1441
1442                 if (offset + length < offset) {
1443                         /* No 64-bit integer wrap. */
1444                         return NT_STATUS_INVALID_PARAMETER;
1445                 }
1446
1447                 /* Shouldn't this be SMB_VFS_STAT ... ? */
1448                 status = vfs_stat_fsp(fsp);
1449                 if (!NT_STATUS_IS_OK(status)) {
1450                         return status;
1451                 }
1452
1453                 *out_len = 16;
1454                 out_data_tmp = talloc_array(ctx, char, *out_len);
1455                 if (out_data_tmp == NULL) {
1456                         DEBUG(10, ("unable to allocate memory for response\n"));
1457                         return NT_STATUS_NO_MEMORY;
1458                 }
1459
1460                 if (offset > fsp->fsp_name->st.st_ex_size ||
1461                                 fsp->fsp_name->st.st_ex_size == 0 ||
1462                                 length == 0) {
1463                         memset(out_data_tmp, 0, *out_len);
1464                 } else {
1465                         uint64_t end = offset + length;
1466                         end = MIN(end, fsp->fsp_name->st.st_ex_size);
1467                         SBVAL(out_data_tmp, 0, 0);
1468                         SBVAL(out_data_tmp, 8, end);
1469                 }
1470
1471                 *out_data = out_data_tmp;
1472
1473                 return NT_STATUS_OK;
1474         }
1475
1476         case FSCTL_IS_VOLUME_DIRTY:
1477         {
1478                 DEBUG(10,("FSCTL_IS_VOLUME_DIRTY: called on %s "
1479                           "(but remotely not supported)\n", fsp_fnum_dbg(fsp)));
1480                 /*
1481                  * http://msdn.microsoft.com/en-us/library/cc232128%28PROT.10%29.aspx
1482                  * says we have to respond with NT_STATUS_INVALID_PARAMETER
1483                  */
1484                 return NT_STATUS_INVALID_PARAMETER;
1485         }
1486
1487         default:
1488                 /*
1489                  * Only print once ... unfortunately there could be lots of
1490                  * different FSCTLs that are called.
1491                  */
1492                 if (!vfswrap_logged_ioctl_message) {
1493                         vfswrap_logged_ioctl_message = true;
1494                         DEBUG(2, ("%s (0x%x): Currently not implemented.\n",
1495                         __func__, function));
1496                 }
1497         }
1498
1499         return NT_STATUS_NOT_SUPPORTED;
1500 }
1501
1502 static bool vfswrap_is_offline(struct vfs_handle_struct *handle,
1503                                const struct smb_filename *fname,
1504                                SMB_STRUCT_STAT *sbuf);
1505
1506 static NTSTATUS vfswrap_get_dos_attributes(struct vfs_handle_struct *handle,
1507                                            struct smb_filename *smb_fname,
1508                                            uint32_t *dosmode)
1509 {
1510         bool offline;
1511
1512         offline = vfswrap_is_offline(handle, smb_fname, &smb_fname->st);
1513         if (offline) {
1514                 *dosmode |= FILE_ATTRIBUTE_OFFLINE;
1515         }
1516
1517         return get_ea_dos_attribute(handle->conn, smb_fname, dosmode);
1518 }
1519
1520 struct vfswrap_get_dos_attributes_state {
1521         struct vfs_aio_state aio_state;
1522         connection_struct *conn;
1523         TALLOC_CTX *mem_ctx;
1524         struct tevent_context *ev;
1525         files_struct *dir_fsp;
1526         struct smb_filename *smb_fname;
1527         uint32_t dosmode;
1528         bool as_root;
1529 };
1530
1531 static void vfswrap_get_dos_attributes_getxattr_done(struct tevent_req *subreq);
1532
1533 static struct tevent_req *vfswrap_get_dos_attributes_send(
1534                         TALLOC_CTX *mem_ctx,
1535                         struct tevent_context *ev,
1536                         struct vfs_handle_struct *handle,
1537                         files_struct *dir_fsp,
1538                         struct smb_filename *smb_fname)
1539 {
1540         struct tevent_req *req = NULL;
1541         struct tevent_req *subreq = NULL;
1542         struct vfswrap_get_dos_attributes_state *state = NULL;
1543
1544         req = tevent_req_create(mem_ctx, &state,
1545                                 struct vfswrap_get_dos_attributes_state);
1546         if (req == NULL) {
1547                 return NULL;
1548         }
1549
1550         *state = (struct vfswrap_get_dos_attributes_state) {
1551                 .conn = dir_fsp->conn,
1552                 .mem_ctx = mem_ctx,
1553                 .ev = ev,
1554                 .dir_fsp = dir_fsp,
1555                 .smb_fname = smb_fname,
1556         };
1557
1558         subreq = SMB_VFS_GETXATTRAT_SEND(state,
1559                                          ev,
1560                                          dir_fsp,
1561                                          smb_fname,
1562                                          SAMBA_XATTR_DOS_ATTRIB,
1563                                          sizeof(fstring));
1564         if (tevent_req_nomem(subreq, req)) {
1565                 return tevent_req_post(req, ev);
1566         }
1567         tevent_req_set_callback(subreq,
1568                                 vfswrap_get_dos_attributes_getxattr_done,
1569                                 req);
1570
1571         return req;
1572 }
1573
1574 static void vfswrap_get_dos_attributes_getxattr_done(struct tevent_req *subreq)
1575 {
1576         struct tevent_req *req =
1577                 tevent_req_callback_data(subreq,
1578                 struct tevent_req);
1579         struct vfswrap_get_dos_attributes_state *state =
1580                 tevent_req_data(req,
1581                 struct vfswrap_get_dos_attributes_state);
1582         ssize_t xattr_size;
1583         DATA_BLOB blob = {0};
1584         NTSTATUS status;
1585
1586         xattr_size = SMB_VFS_GETXATTRAT_RECV(subreq,
1587                                              &state->aio_state,
1588                                              state,
1589                                              &blob.data);
1590         TALLOC_FREE(subreq);
1591         if (xattr_size == -1) {
1592                 status = map_nt_error_from_unix(state->aio_state.error);
1593
1594                 if (state->as_root) {
1595                         tevent_req_nterror(req, status);
1596                         return;
1597                 }
1598                 if (!NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
1599                         tevent_req_nterror(req, status);
1600                         return;
1601                 }
1602
1603                 state->as_root = true;
1604
1605                 become_root();
1606                 subreq = SMB_VFS_GETXATTRAT_SEND(state,
1607                                                  state->ev,
1608                                                  state->dir_fsp,
1609                                                  state->smb_fname,
1610                                                  SAMBA_XATTR_DOS_ATTRIB,
1611                                                  sizeof(fstring));
1612                 unbecome_root();
1613                 if (tevent_req_nomem(subreq, req)) {
1614                         return;
1615                 }
1616                 tevent_req_set_callback(subreq,
1617                                         vfswrap_get_dos_attributes_getxattr_done,
1618                                         req);
1619                 return;
1620         }
1621
1622         blob.length = xattr_size;
1623
1624         status = parse_dos_attribute_blob(state->smb_fname,
1625                                           blob,
1626                                           &state->dosmode);
1627         if (!NT_STATUS_IS_OK(status)) {
1628                 tevent_req_nterror(req, status);
1629                 return;
1630         }
1631
1632         tevent_req_done(req);
1633         return;
1634 }
1635
1636 static NTSTATUS vfswrap_get_dos_attributes_recv(struct tevent_req *req,
1637                                                 struct vfs_aio_state *aio_state,
1638                                                 uint32_t *dosmode)
1639 {
1640         struct vfswrap_get_dos_attributes_state *state =
1641                 tevent_req_data(req,
1642                 struct vfswrap_get_dos_attributes_state);
1643         NTSTATUS status;
1644
1645         if (tevent_req_is_nterror(req, &status)) {
1646                 tevent_req_received(req);
1647                 return status;
1648         }
1649
1650         *aio_state = state->aio_state;
1651         *dosmode = state->dosmode;
1652         tevent_req_received(req);
1653         return NT_STATUS_OK;
1654 }
1655
1656 static NTSTATUS vfswrap_fget_dos_attributes(struct vfs_handle_struct *handle,
1657                                             struct files_struct *fsp,
1658                                             uint32_t *dosmode)
1659 {
1660         bool offline;
1661
1662         offline = vfswrap_is_offline(handle, fsp->fsp_name, &fsp->fsp_name->st);
1663         if (offline) {
1664                 *dosmode |= FILE_ATTRIBUTE_OFFLINE;
1665         }
1666
1667         return get_ea_dos_attribute(handle->conn, fsp->fsp_name, dosmode);
1668 }
1669
1670 static NTSTATUS vfswrap_set_dos_attributes(struct vfs_handle_struct *handle,
1671                                            const struct smb_filename *smb_fname,
1672                                            uint32_t dosmode)
1673 {
1674         return set_ea_dos_attribute(handle->conn, smb_fname, dosmode);
1675 }
1676
1677 static NTSTATUS vfswrap_fset_dos_attributes(struct vfs_handle_struct *handle,
1678                                             struct files_struct *fsp,
1679                                             uint32_t dosmode)
1680 {
1681         return set_ea_dos_attribute(handle->conn, fsp->fsp_name, dosmode);
1682 }
1683
1684 static struct vfs_offload_ctx *vfswrap_offload_ctx;
1685
1686 struct vfswrap_offload_read_state {
1687         DATA_BLOB token;
1688 };
1689
1690 static struct tevent_req *vfswrap_offload_read_send(
1691         TALLOC_CTX *mem_ctx,
1692         struct tevent_context *ev,
1693         struct vfs_handle_struct *handle,
1694         struct files_struct *fsp,
1695         uint32_t fsctl,
1696         uint32_t ttl,
1697         off_t offset,
1698         size_t to_copy)
1699 {
1700         struct tevent_req *req = NULL;
1701         struct vfswrap_offload_read_state *state = NULL;
1702         NTSTATUS status;
1703
1704         req = tevent_req_create(mem_ctx, &state,
1705                                 struct vfswrap_offload_read_state);
1706         if (req == NULL) {
1707                 return NULL;
1708         }
1709
1710         status = vfs_offload_token_ctx_init(fsp->conn->sconn->client,
1711                                             &vfswrap_offload_ctx);
1712         if (tevent_req_nterror(req, status)) {
1713                 return tevent_req_post(req, ev);
1714         }
1715
1716         if (fsctl != FSCTL_SRV_REQUEST_RESUME_KEY) {
1717                 tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
1718                 return tevent_req_post(req, ev);
1719         }
1720
1721         status = vfs_offload_token_create_blob(state, fsp, fsctl,
1722                                                &state->token);
1723         if (tevent_req_nterror(req, status)) {
1724                 return tevent_req_post(req, ev);
1725         }
1726
1727         status = vfs_offload_token_db_store_fsp(vfswrap_offload_ctx, fsp,
1728                                                 &state->token);
1729         if (tevent_req_nterror(req, status)) {
1730                 return tevent_req_post(req, ev);
1731         }
1732
1733         tevent_req_done(req);
1734         return tevent_req_post(req, ev);
1735 }
1736
1737 static NTSTATUS vfswrap_offload_read_recv(struct tevent_req *req,
1738                                           struct vfs_handle_struct *handle,
1739                                           TALLOC_CTX *mem_ctx,
1740                                           DATA_BLOB *token)
1741 {
1742         struct vfswrap_offload_read_state *state = tevent_req_data(
1743                 req, struct vfswrap_offload_read_state);
1744         NTSTATUS status;
1745
1746         if (tevent_req_is_nterror(req, &status)) {
1747                 tevent_req_received(req);
1748                 return status;
1749         }
1750
1751         token->length = state->token.length;
1752         token->data = talloc_move(mem_ctx, &state->token.data);
1753
1754         tevent_req_received(req);
1755         return NT_STATUS_OK;
1756 }
1757
1758 struct vfswrap_offload_write_state {
1759         uint8_t *buf;
1760         bool read_lck_locked;
1761         bool write_lck_locked;
1762         DATA_BLOB *token;
1763         struct tevent_context *src_ev;
1764         struct files_struct *src_fsp;
1765         off_t src_off;
1766         struct tevent_context *dst_ev;
1767         struct files_struct *dst_fsp;
1768         off_t dst_off;
1769         off_t to_copy;
1770         off_t remaining;
1771         size_t next_io_size;
1772 };
1773
1774 static void vfswrap_offload_write_cleanup(struct tevent_req *req,
1775                                           enum tevent_req_state req_state)
1776 {
1777         struct vfswrap_offload_write_state *state = tevent_req_data(
1778                 req, struct vfswrap_offload_write_state);
1779         bool ok;
1780
1781         if (state->dst_fsp == NULL) {
1782                 return;
1783         }
1784
1785         ok = change_to_user_by_fsp(state->dst_fsp);
1786         SMB_ASSERT(ok);
1787         state->dst_fsp = NULL;
1788 }
1789
1790 static NTSTATUS vfswrap_offload_write_loop(struct tevent_req *req);
1791
1792 static struct tevent_req *vfswrap_offload_write_send(
1793         struct vfs_handle_struct *handle,
1794         TALLOC_CTX *mem_ctx,
1795         struct tevent_context *ev,
1796         uint32_t fsctl,
1797         DATA_BLOB *token,
1798         off_t transfer_offset,
1799         struct files_struct *dest_fsp,
1800         off_t dest_off,
1801         off_t to_copy)
1802 {
1803         struct tevent_req *req;
1804         struct vfswrap_offload_write_state *state = NULL;
1805         size_t num = MIN(to_copy, COPYCHUNK_MAX_TOTAL_LEN);
1806         files_struct *src_fsp = NULL;
1807         NTSTATUS status;
1808         bool ok;
1809
1810         req = tevent_req_create(mem_ctx, &state,
1811                                 struct vfswrap_offload_write_state);
1812         if (req == NULL) {
1813                 return NULL;
1814         }
1815
1816         *state = (struct vfswrap_offload_write_state) {
1817                 .token = token,
1818                 .src_off = transfer_offset,
1819                 .dst_ev = ev,
1820                 .dst_fsp = dest_fsp,
1821                 .dst_off = dest_off,
1822                 .to_copy = to_copy,
1823                 .remaining = to_copy,
1824         };
1825
1826         tevent_req_set_cleanup_fn(req, vfswrap_offload_write_cleanup);
1827
1828         switch (fsctl) {
1829         case FSCTL_SRV_COPYCHUNK:
1830         case FSCTL_SRV_COPYCHUNK_WRITE:
1831                 break;
1832
1833         case FSCTL_OFFLOAD_WRITE:
1834                 tevent_req_nterror(req, NT_STATUS_NOT_IMPLEMENTED);
1835                 return tevent_req_post(req, ev);
1836
1837         case FSCTL_DUP_EXTENTS_TO_FILE:
1838                 DBG_DEBUG("COW clones not supported by vfs_default\n");
1839                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
1840                 return tevent_req_post(req, ev);
1841
1842         default:
1843                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
1844                 return tevent_req_post(req, ev);
1845         }
1846
1847         /*
1848          * From here on we assume a copy-chunk fsctl
1849          */
1850
1851         if (to_copy == 0) {
1852                 tevent_req_done(req);
1853                 return tevent_req_post(req, ev);
1854         }
1855
1856         status = vfs_offload_token_db_fetch_fsp(vfswrap_offload_ctx,
1857                                                 token, &src_fsp);
1858         if (tevent_req_nterror(req, status)) {
1859                 return tevent_req_post(req, ev);
1860         }
1861
1862         DBG_DEBUG("server side copy chunk of length %" PRIu64 "\n", to_copy);
1863
1864         status = vfs_offload_token_check_handles(fsctl, src_fsp, dest_fsp);
1865         if (!NT_STATUS_IS_OK(status)) {
1866                 tevent_req_nterror(req, status);
1867                 return tevent_req_post(req, ev);
1868         }
1869
1870         ok = change_to_user_by_fsp(src_fsp);
1871         if (!ok) {
1872                 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
1873                 return tevent_req_post(req, ev);
1874         }
1875
1876         state->src_ev = src_fsp->conn->sconn->ev_ctx;
1877         state->src_fsp = src_fsp;
1878
1879         state->buf = talloc_array(state, uint8_t, num);
1880         if (tevent_req_nomem(state->buf, req)) {
1881                 return tevent_req_post(req, ev);
1882         }
1883
1884         status = vfs_stat_fsp(src_fsp);
1885         if (tevent_req_nterror(req, status)) {
1886                 return tevent_req_post(req, ev);
1887         }
1888
1889         if (src_fsp->fsp_name->st.st_ex_size < state->src_off + num) {
1890                 /*
1891                  * [MS-SMB2] 3.3.5.15.6 Handling a Server-Side Data Copy Request
1892                  *   If the SourceOffset or SourceOffset + Length extends beyond
1893                  *   the end of file, the server SHOULD<240> treat this as a
1894                  *   STATUS_END_OF_FILE error.
1895                  * ...
1896                  *   <240> Section 3.3.5.15.6: Windows servers will return
1897                  *   STATUS_INVALID_VIEW_SIZE instead of STATUS_END_OF_FILE.
1898                  */
1899                 tevent_req_nterror(req, NT_STATUS_INVALID_VIEW_SIZE);
1900                 return tevent_req_post(req, ev);
1901         }
1902
1903         status = vfswrap_offload_write_loop(req);
1904         if (!NT_STATUS_IS_OK(status)) {
1905                 tevent_req_nterror(req, status);
1906                 return tevent_req_post(req, ev);
1907         }
1908
1909         return req;
1910 }
1911
1912 static void vfswrap_offload_write_read_done(struct tevent_req *subreq);
1913
1914 static NTSTATUS vfswrap_offload_write_loop(struct tevent_req *req)
1915 {
1916         struct vfswrap_offload_write_state *state = tevent_req_data(
1917                 req, struct vfswrap_offload_write_state);
1918         struct tevent_req *subreq = NULL;
1919         struct lock_struct read_lck;
1920         bool ok;
1921
1922         /*
1923          * This is called under the context of state->src_fsp.
1924          */
1925
1926         state->next_io_size = MIN(state->remaining, talloc_array_length(state->buf));
1927
1928         init_strict_lock_struct(state->src_fsp,
1929                                 state->src_fsp->op->global->open_persistent_id,
1930                                 state->src_off,
1931                                 state->next_io_size,
1932                                 READ_LOCK,
1933                                 &read_lck);
1934
1935         ok = SMB_VFS_STRICT_LOCK_CHECK(state->src_fsp->conn,
1936                                  state->src_fsp,
1937                                  &read_lck);
1938         if (!ok) {
1939                 return NT_STATUS_FILE_LOCK_CONFLICT;
1940         }
1941
1942         subreq = SMB_VFS_PREAD_SEND(state,
1943                                     state->src_ev,
1944                                     state->src_fsp,
1945                                     state->buf,
1946                                     state->next_io_size,
1947                                     state->src_off);
1948         if (subreq == NULL) {
1949                 return NT_STATUS_NO_MEMORY;
1950         }
1951         tevent_req_set_callback(subreq, vfswrap_offload_write_read_done, req);
1952
1953         return NT_STATUS_OK;
1954 }
1955
1956 static void vfswrap_offload_write_write_done(struct tevent_req *subreq);
1957
1958 static void vfswrap_offload_write_read_done(struct tevent_req *subreq)
1959 {
1960         struct tevent_req *req = tevent_req_callback_data(
1961                 subreq, struct tevent_req);
1962         struct vfswrap_offload_write_state *state = tevent_req_data(
1963                 req, struct vfswrap_offload_write_state);
1964         struct vfs_aio_state aio_state;
1965         struct lock_struct write_lck;
1966         ssize_t nread;
1967         bool ok;
1968
1969         nread = SMB_VFS_PREAD_RECV(subreq, &aio_state);
1970         TALLOC_FREE(subreq);
1971         if (nread == -1) {
1972                 DBG_ERR("read failed: %s\n", strerror(errno));
1973                 tevent_req_nterror(req, map_nt_error_from_unix(aio_state.error));
1974                 return;
1975         }
1976         if (nread != state->next_io_size) {
1977                 DBG_ERR("Short read, only %zd of %zu\n",
1978                         nread, state->next_io_size);
1979                 tevent_req_nterror(req, NT_STATUS_IO_DEVICE_ERROR);
1980                 return;
1981         }
1982
1983         state->src_off += nread;
1984
1985         ok = change_to_user_by_fsp(state->dst_fsp);
1986         if (!ok) {
1987                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
1988                 return;
1989         }
1990
1991         init_strict_lock_struct(state->dst_fsp,
1992                                 state->dst_fsp->op->global->open_persistent_id,
1993                                 state->dst_off,
1994                                 state->next_io_size,
1995                                 WRITE_LOCK,
1996                                 &write_lck);
1997
1998         ok = SMB_VFS_STRICT_LOCK_CHECK(state->dst_fsp->conn,
1999                                  state->dst_fsp,
2000                                  &write_lck);
2001         if (!ok) {
2002                 tevent_req_nterror(req, NT_STATUS_FILE_LOCK_CONFLICT);
2003                 return;
2004         }
2005
2006         subreq = SMB_VFS_PWRITE_SEND(state,
2007                                      state->dst_ev,
2008                                      state->dst_fsp,
2009                                      state->buf,
2010                                      state->next_io_size,
2011                                      state->dst_off);
2012         if (subreq == NULL) {
2013                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
2014                 return;
2015         }
2016         tevent_req_set_callback(subreq, vfswrap_offload_write_write_done, req);
2017 }
2018
2019 static void vfswrap_offload_write_write_done(struct tevent_req *subreq)
2020 {
2021         struct tevent_req *req = tevent_req_callback_data(
2022                 subreq, struct tevent_req);
2023         struct vfswrap_offload_write_state *state = tevent_req_data(
2024                 req, struct vfswrap_offload_write_state);
2025         struct vfs_aio_state aio_state;
2026         ssize_t nwritten;
2027         NTSTATUS status;
2028         bool ok;
2029
2030         nwritten = SMB_VFS_PWRITE_RECV(subreq, &aio_state);
2031         TALLOC_FREE(subreq);
2032         if (nwritten == -1) {
2033                 DBG_ERR("write failed: %s\n", strerror(errno));
2034                 tevent_req_nterror(req, map_nt_error_from_unix(aio_state.error));
2035                 return;
2036         }
2037         if (nwritten != state->next_io_size) {
2038                 DBG_ERR("Short write, only %zd of %zu\n", nwritten, state->next_io_size);
2039                 tevent_req_nterror(req, NT_STATUS_IO_DEVICE_ERROR);
2040                 return;
2041         }
2042
2043         state->dst_off += nwritten;
2044
2045         if (state->remaining < nwritten) {
2046                 /* Paranoia check */
2047                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
2048                 return;
2049         }
2050         state->remaining -= nwritten;
2051         if (state->remaining == 0) {
2052                 tevent_req_done(req);
2053                 return;
2054         }
2055
2056         ok = change_to_user_by_fsp(state->src_fsp);
2057         if (!ok) {
2058                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
2059                 return;
2060         }
2061
2062         status = vfswrap_offload_write_loop(req);
2063         if (!NT_STATUS_IS_OK(status)) {
2064                 tevent_req_nterror(req, status);
2065                 return;
2066         }
2067
2068         return;
2069 }
2070
2071 static NTSTATUS vfswrap_offload_write_recv(struct vfs_handle_struct *handle,
2072                                         struct tevent_req *req,
2073                                         off_t *copied)
2074 {
2075         struct vfswrap_offload_write_state *state = tevent_req_data(
2076                 req, struct vfswrap_offload_write_state);
2077         NTSTATUS status;
2078
2079         if (tevent_req_is_nterror(req, &status)) {
2080                 DBG_DEBUG("copy chunk failed: %s\n", nt_errstr(status));
2081                 *copied = 0;
2082                 tevent_req_received(req);
2083                 return status;
2084         }
2085
2086         *copied = state->to_copy;
2087         DBG_DEBUG("copy chunk copied %lu\n", (unsigned long)*copied);
2088         tevent_req_received(req);
2089
2090         return NT_STATUS_OK;
2091 }
2092
2093 static NTSTATUS vfswrap_get_compression(struct vfs_handle_struct *handle,
2094                                         TALLOC_CTX *mem_ctx,
2095                                         struct files_struct *fsp,
2096                                         struct smb_filename *smb_fname,
2097                                         uint16_t *_compression_fmt)
2098 {
2099         return NT_STATUS_INVALID_DEVICE_REQUEST;
2100 }
2101
2102 static NTSTATUS vfswrap_set_compression(struct vfs_handle_struct *handle,
2103                                         TALLOC_CTX *mem_ctx,
2104                                         struct files_struct *fsp,
2105                                         uint16_t compression_fmt)
2106 {
2107         return NT_STATUS_INVALID_DEVICE_REQUEST;
2108 }
2109
2110 /********************************************************************
2111  Given a stat buffer return the allocated size on disk, taking into
2112  account sparse files.
2113 ********************************************************************/
2114 static uint64_t vfswrap_get_alloc_size(vfs_handle_struct *handle,
2115                                        struct files_struct *fsp,
2116                                        const SMB_STRUCT_STAT *sbuf)
2117 {
2118         uint64_t result;
2119
2120         START_PROFILE(syscall_get_alloc_size);
2121
2122         if(S_ISDIR(sbuf->st_ex_mode)) {
2123                 result = 0;
2124                 goto out;
2125         }
2126
2127 #if defined(HAVE_STAT_ST_BLOCKS) && defined(STAT_ST_BLOCKSIZE)
2128         /* The type of st_blocksize is blkcnt_t which *MUST* be
2129            signed (according to POSIX) and can be less than 64-bits.
2130            Ensure when we're converting to 64 bits wide we don't
2131            sign extend. */
2132 #if defined(SIZEOF_BLKCNT_T_8)
2133         result = (uint64_t)STAT_ST_BLOCKSIZE * (uint64_t)sbuf->st_ex_blocks;
2134 #elif defined(SIZEOF_BLKCNT_T_4)
2135         {
2136                 uint64_t bs = ((uint64_t)sbuf->st_ex_blocks) & 0xFFFFFFFFLL;
2137                 result = (uint64_t)STAT_ST_BLOCKSIZE * bs;
2138         }
2139 #else
2140 #error SIZEOF_BLKCNT_T_NOT_A_SUPPORTED_VALUE
2141 #endif
2142         if (result == 0) {
2143                 /*
2144                  * Some file systems do not allocate a block for very
2145                  * small files. But for non-empty file should report a
2146                  * positive size.
2147                  */
2148
2149                 uint64_t filesize = get_file_size_stat(sbuf);
2150                 if (filesize > 0) {
2151                         result = MIN((uint64_t)STAT_ST_BLOCKSIZE, filesize);
2152                 }
2153         }
2154 #else
2155         result = get_file_size_stat(sbuf);
2156 #endif
2157
2158         if (fsp && fsp->initial_allocation_size)
2159                 result = MAX(result,fsp->initial_allocation_size);
2160
2161         result = smb_roundup(handle->conn, result);
2162
2163  out:
2164         END_PROFILE(syscall_get_alloc_size);
2165         return result;
2166 }
2167
2168 static int vfswrap_unlink(vfs_handle_struct *handle,
2169                           const struct smb_filename *smb_fname)
2170 {
2171         int result = -1;
2172
2173         START_PROFILE(syscall_unlink);
2174
2175         if (smb_fname->stream_name) {
2176                 errno = ENOENT;
2177                 goto out;
2178         }
2179         result = unlink(smb_fname->base_name);
2180
2181  out:
2182         END_PROFILE(syscall_unlink);
2183         return result;
2184 }
2185
2186 static int vfswrap_chmod(vfs_handle_struct *handle,
2187                         const struct smb_filename *smb_fname,
2188                         mode_t mode)
2189 {
2190         int result;
2191
2192         START_PROFILE(syscall_chmod);
2193         result = chmod(smb_fname->base_name, mode);
2194         END_PROFILE(syscall_chmod);
2195         return result;
2196 }
2197
2198 static int vfswrap_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
2199 {
2200         int result;
2201
2202         START_PROFILE(syscall_fchmod);
2203 #if defined(HAVE_FCHMOD)
2204         result = fchmod(fsp->fh->fd, mode);
2205 #else
2206         result = -1;
2207         errno = ENOSYS;
2208 #endif
2209
2210         END_PROFILE(syscall_fchmod);
2211         return result;
2212 }
2213
2214 static int vfswrap_chown(vfs_handle_struct *handle,
2215                         const struct smb_filename *smb_fname,
2216                         uid_t uid,
2217                         gid_t gid)
2218 {
2219         int result;
2220
2221         START_PROFILE(syscall_chown);
2222         result = chown(smb_fname->base_name, uid, gid);
2223         END_PROFILE(syscall_chown);
2224         return result;
2225 }
2226
2227 static int vfswrap_fchown(vfs_handle_struct *handle, files_struct *fsp, uid_t uid, gid_t gid)
2228 {
2229 #ifdef HAVE_FCHOWN
2230         int result;
2231
2232         START_PROFILE(syscall_fchown);
2233         result = fchown(fsp->fh->fd, uid, gid);
2234         END_PROFILE(syscall_fchown);
2235         return result;
2236 #else
2237         errno = ENOSYS;
2238         return -1;
2239 #endif
2240 }
2241
2242 static int vfswrap_lchown(vfs_handle_struct *handle,
2243                         const struct smb_filename *smb_fname,
2244                         uid_t uid,
2245                         gid_t gid)
2246 {
2247         int result;
2248
2249         START_PROFILE(syscall_lchown);
2250         result = lchown(smb_fname->base_name, uid, gid);
2251         END_PROFILE(syscall_lchown);
2252         return result;
2253 }
2254
2255 static int vfswrap_chdir(vfs_handle_struct *handle,
2256                         const struct smb_filename *smb_fname)
2257 {
2258         int result;
2259
2260         START_PROFILE(syscall_chdir);
2261         result = chdir(smb_fname->base_name);
2262         END_PROFILE(syscall_chdir);
2263         return result;
2264 }
2265
2266 static struct smb_filename *vfswrap_getwd(vfs_handle_struct *handle,
2267                                 TALLOC_CTX *ctx)
2268 {
2269         char *result;
2270         struct smb_filename *smb_fname = NULL;
2271
2272         START_PROFILE(syscall_getwd);
2273         result = sys_getwd();
2274         END_PROFILE(syscall_getwd);
2275
2276         if (result == NULL) {
2277                 return NULL;
2278         }
2279         smb_fname = synthetic_smb_fname(ctx,
2280                                 result,
2281                                 NULL,
2282                                 NULL,
2283                                 0);
2284         /*
2285          * sys_getwd() *always* returns malloced memory.
2286          * We must free here to avoid leaks:
2287          * BUG:https://bugzilla.samba.org/show_bug.cgi?id=13372
2288          */
2289         SAFE_FREE(result);
2290         return smb_fname;
2291 }
2292
2293 /*********************************************************************
2294  nsec timestamp resolution call. Convert down to whatever the underlying
2295  system will support.
2296 **********************************************************************/
2297
2298 static int vfswrap_ntimes(vfs_handle_struct *handle,
2299                           const struct smb_filename *smb_fname,
2300                           struct smb_file_time *ft)
2301 {
2302         int result = -1;
2303
2304         START_PROFILE(syscall_ntimes);
2305
2306         if (smb_fname->stream_name) {
2307                 errno = ENOENT;
2308                 goto out;
2309         }
2310
2311         if (ft != NULL) {
2312                 if (null_timespec(ft->atime)) {
2313                         ft->atime= smb_fname->st.st_ex_atime;
2314                 }
2315
2316                 if (null_timespec(ft->mtime)) {
2317                         ft->mtime = smb_fname->st.st_ex_mtime;
2318                 }
2319
2320                 if (!null_timespec(ft->create_time)) {
2321                         set_create_timespec_ea(handle->conn,
2322                                                smb_fname,
2323                                                ft->create_time);
2324                 }
2325
2326                 if ((timespec_compare(&ft->atime,
2327                                       &smb_fname->st.st_ex_atime) == 0) &&
2328                     (timespec_compare(&ft->mtime,
2329                                       &smb_fname->st.st_ex_mtime) == 0)) {
2330                         return 0;
2331                 }
2332         }
2333
2334 #if defined(HAVE_UTIMENSAT)
2335         if (ft != NULL) {
2336                 struct timespec ts[2];
2337                 ts[0] = ft->atime;
2338                 ts[1] = ft->mtime;
2339                 result = utimensat(AT_FDCWD, smb_fname->base_name, ts, 0);
2340         } else {
2341                 result = utimensat(AT_FDCWD, smb_fname->base_name, NULL, 0);
2342         }
2343         if (!((result == -1) && (errno == ENOSYS))) {
2344                 goto out;
2345         }
2346 #endif
2347 #if defined(HAVE_UTIMES)
2348         if (ft != NULL) {
2349                 struct timeval tv[2];
2350                 tv[0] = convert_timespec_to_timeval(ft->atime);
2351                 tv[1] = convert_timespec_to_timeval(ft->mtime);
2352                 result = utimes(smb_fname->base_name, tv);
2353         } else {
2354                 result = utimes(smb_fname->base_name, NULL);
2355         }
2356         if (!((result == -1) && (errno == ENOSYS))) {
2357                 goto out;
2358         }
2359 #endif
2360 #if defined(HAVE_UTIME)
2361         if (ft != NULL) {
2362                 struct utimbuf times;
2363                 times.actime = convert_timespec_to_time_t(ft->atime);
2364                 times.modtime = convert_timespec_to_time_t(ft->mtime);
2365                 result = utime(smb_fname->base_name, &times);
2366         } else {
2367                 result = utime(smb_fname->base_name, NULL);
2368         }
2369         if (!((result == -1) && (errno == ENOSYS))) {
2370                 goto out;
2371         }
2372 #endif
2373         errno = ENOSYS;
2374         result = -1;
2375
2376  out:
2377         END_PROFILE(syscall_ntimes);
2378         return result;
2379 }
2380
2381 /*********************************************************************
2382  A version of ftruncate that will write the space on disk if strict
2383  allocate is set.
2384 **********************************************************************/
2385
2386 static int strict_allocate_ftruncate(vfs_handle_struct *handle, files_struct *fsp, off_t len)
2387 {
2388         off_t space_to_write;
2389         uint64_t space_avail;
2390         uint64_t bsize,dfree,dsize;
2391         int ret;
2392         NTSTATUS status;
2393         SMB_STRUCT_STAT *pst;
2394
2395         status = vfs_stat_fsp(fsp);
2396         if (!NT_STATUS_IS_OK(status)) {
2397                 return -1;
2398         }
2399         pst = &fsp->fsp_name->st;
2400
2401 #ifdef S_ISFIFO
2402         if (S_ISFIFO(pst->st_ex_mode))
2403                 return 0;
2404 #endif
2405
2406         if (pst->st_ex_size == len)
2407                 return 0;
2408
2409         /* Shrink - just ftruncate. */
2410         if (pst->st_ex_size > len)
2411                 return ftruncate(fsp->fh->fd, len);
2412
2413         space_to_write = len - pst->st_ex_size;
2414
2415         /* for allocation try fallocate first. This can fail on some
2416            platforms e.g. when the filesystem doesn't support it and no
2417            emulation is being done by the libc (like on AIX with JFS1). In that
2418            case we do our own emulation. fallocate implementations can
2419            return ENOTSUP or EINVAL in cases like that. */
2420         ret = SMB_VFS_FALLOCATE(fsp, 0, pst->st_ex_size, space_to_write);
2421         if (ret == -1 && errno == ENOSPC) {
2422                 return -1;
2423         }
2424         if (ret == 0) {
2425                 return 0;
2426         }
2427         DEBUG(10,("strict_allocate_ftruncate: SMB_VFS_FALLOCATE failed with "
2428                 "error %d. Falling back to slow manual allocation\n", errno));
2429
2430         /* available disk space is enough or not? */
2431         space_avail =
2432             get_dfree_info(fsp->conn, fsp->fsp_name, &bsize, &dfree, &dsize);
2433         /* space_avail is 1k blocks */
2434         if (space_avail == (uint64_t)-1 ||
2435                         ((uint64_t)space_to_write/1024 > space_avail) ) {
2436                 errno = ENOSPC;
2437                 return -1;
2438         }
2439
2440         /* Write out the real space on disk. */
2441         ret = vfs_slow_fallocate(fsp, pst->st_ex_size, space_to_write);
2442         if (ret != 0) {
2443                 return -1;
2444         }
2445
2446         return 0;
2447 }
2448
2449 static int vfswrap_ftruncate(vfs_handle_struct *handle, files_struct *fsp, off_t len)
2450 {
2451         int result = -1;
2452         SMB_STRUCT_STAT *pst;
2453         NTSTATUS status;
2454         char c = 0;
2455
2456         START_PROFILE(syscall_ftruncate);
2457
2458         if (lp_strict_allocate(SNUM(fsp->conn)) && !fsp->is_sparse) {
2459                 result = strict_allocate_ftruncate(handle, fsp, len);
2460                 END_PROFILE(syscall_ftruncate);
2461                 return result;
2462         }
2463
2464         /* we used to just check HAVE_FTRUNCATE_EXTEND and only use
2465            ftruncate if the system supports it. Then I discovered that
2466            you can have some filesystems that support ftruncate
2467            expansion and some that don't! On Linux fat can't do
2468            ftruncate extend but ext2 can. */
2469
2470         result = ftruncate(fsp->fh->fd, len);
2471
2472         /* According to W. R. Stevens advanced UNIX prog. Pure 4.3 BSD cannot
2473            extend a file with ftruncate. Provide alternate implementation
2474            for this */
2475
2476         /* Do an fstat to see if the file is longer than the requested
2477            size in which case the ftruncate above should have
2478            succeeded or shorter, in which case seek to len - 1 and
2479            write 1 byte of zero */
2480         status = vfs_stat_fsp(fsp);
2481         if (!NT_STATUS_IS_OK(status)) {
2482                 goto done;
2483         }
2484
2485         /* We need to update the files_struct after successful ftruncate */
2486         if (result == 0) {
2487                 goto done;
2488         }
2489
2490         pst = &fsp->fsp_name->st;
2491
2492 #ifdef S_ISFIFO
2493         if (S_ISFIFO(pst->st_ex_mode)) {
2494                 result = 0;
2495                 goto done;
2496         }
2497 #endif
2498
2499         if (pst->st_ex_size == len) {
2500                 result = 0;
2501                 goto done;
2502         }
2503
2504         if (pst->st_ex_size > len) {
2505                 /* the ftruncate should have worked */
2506                 goto done;
2507         }
2508
2509         if (SMB_VFS_PWRITE(fsp, &c, 1, len-1)!=1) {
2510                 goto done;
2511         }
2512
2513         result = 0;
2514
2515   done:
2516
2517         END_PROFILE(syscall_ftruncate);
2518         return result;
2519 }
2520
2521 static int vfswrap_fallocate(vfs_handle_struct *handle,
2522                         files_struct *fsp,
2523                         uint32_t mode,
2524                         off_t offset,
2525                         off_t len)
2526 {
2527         int result;
2528
2529         START_PROFILE(syscall_fallocate);
2530         if (mode == 0) {
2531                 result = sys_posix_fallocate(fsp->fh->fd, offset, len);
2532                 /*
2533                  * posix_fallocate returns 0 on success, errno on error
2534                  * and doesn't set errno. Make it behave like fallocate()
2535                  * which returns -1, and sets errno on failure.
2536                  */
2537                 if (result != 0) {
2538                         errno = result;
2539                         result = -1;
2540                 }
2541         } else {
2542                 /* sys_fallocate handles filtering of unsupported mode flags */
2543                 result = sys_fallocate(fsp->fh->fd, mode, offset, len);
2544         }
2545         END_PROFILE(syscall_fallocate);
2546         return result;
2547 }
2548
2549 static bool vfswrap_lock(vfs_handle_struct *handle, files_struct *fsp, int op, off_t offset, off_t count, int type)
2550 {
2551         bool result;
2552
2553         START_PROFILE(syscall_fcntl_lock);
2554
2555         if (fsp->use_ofd_locks) {
2556                 op = map_process_lock_to_ofd_lock(op);
2557         }
2558
2559         result =  fcntl_lock(fsp->fh->fd, op, offset, count, type);
2560         END_PROFILE(syscall_fcntl_lock);
2561         return result;
2562 }
2563
2564 static int vfswrap_kernel_flock(vfs_handle_struct *handle, files_struct *fsp,
2565                                 uint32_t share_mode, uint32_t access_mask)
2566 {
2567         START_PROFILE(syscall_kernel_flock);
2568         kernel_flock(fsp->fh->fd, share_mode, access_mask);
2569         END_PROFILE(syscall_kernel_flock);
2570         return 0;
2571 }
2572
2573 static bool vfswrap_getlock(vfs_handle_struct *handle, files_struct *fsp, off_t *poffset, off_t *pcount, int *ptype, pid_t *ppid)
2574 {
2575         bool result;
2576         int op = F_GETLK;
2577
2578         START_PROFILE(syscall_fcntl_getlock);
2579
2580         if (fsp->use_ofd_locks) {
2581                 op = map_process_lock_to_ofd_lock(op);
2582         }
2583
2584         result = fcntl_getlock(fsp->fh->fd, op, poffset, pcount, ptype, ppid);
2585         END_PROFILE(syscall_fcntl_getlock);
2586         return result;
2587 }
2588
2589 static int vfswrap_linux_setlease(vfs_handle_struct *handle, files_struct *fsp,
2590                                 int leasetype)
2591 {
2592         int result = -1;
2593
2594         START_PROFILE(syscall_linux_setlease);
2595
2596 #ifdef HAVE_KERNEL_OPLOCKS_LINUX
2597         result = linux_setlease(fsp->fh->fd, leasetype);
2598 #else
2599         errno = ENOSYS;
2600 #endif
2601         END_PROFILE(syscall_linux_setlease);
2602         return result;
2603 }
2604
2605 static int vfswrap_symlink(vfs_handle_struct *handle,
2606                         const char *link_target,
2607                         const struct smb_filename *new_smb_fname)
2608 {
2609         int result;
2610
2611         START_PROFILE(syscall_symlink);
2612         result = symlink(link_target, new_smb_fname->base_name);
2613         END_PROFILE(syscall_symlink);
2614         return result;
2615 }
2616
2617 static int vfswrap_readlink(vfs_handle_struct *handle,
2618                         const struct smb_filename *smb_fname,
2619                         char *buf,
2620                         size_t bufsiz)
2621 {
2622         int result;
2623
2624         START_PROFILE(syscall_readlink);
2625         result = readlink(smb_fname->base_name, buf, bufsiz);
2626         END_PROFILE(syscall_readlink);
2627         return result;
2628 }
2629
2630 static int vfswrap_link(vfs_handle_struct *handle,
2631                         const struct smb_filename *old_smb_fname,
2632                         const struct smb_filename *new_smb_fname)
2633 {
2634         int result;
2635
2636         START_PROFILE(syscall_link);
2637         result = link(old_smb_fname->base_name, new_smb_fname->base_name);
2638         END_PROFILE(syscall_link);
2639         return result;
2640 }
2641
2642 static int vfswrap_mknod(vfs_handle_struct *handle,
2643                         const struct smb_filename *smb_fname,
2644                         mode_t mode,
2645                         SMB_DEV_T dev)
2646 {
2647         int result;
2648
2649         START_PROFILE(syscall_mknod);
2650         result = sys_mknod(smb_fname->base_name, mode, dev);
2651         END_PROFILE(syscall_mknod);
2652         return result;
2653 }
2654
2655 static struct smb_filename *vfswrap_realpath(vfs_handle_struct *handle,
2656                         TALLOC_CTX *ctx,
2657                         const struct smb_filename *smb_fname)
2658 {
2659         char *result;
2660         struct smb_filename *result_fname = NULL;
2661
2662         START_PROFILE(syscall_realpath);
2663         result = sys_realpath(smb_fname->base_name);
2664         END_PROFILE(syscall_realpath);
2665         if (result) {
2666                 result_fname = synthetic_smb_fname(ctx, result, NULL, NULL, 0);
2667                 SAFE_FREE(result);
2668         }
2669         return result_fname;
2670 }
2671
2672 static int vfswrap_chflags(vfs_handle_struct *handle,
2673                         const struct smb_filename *smb_fname,
2674                         unsigned int flags)
2675 {
2676 #ifdef HAVE_CHFLAGS
2677         return chflags(smb_fname->base_name, flags);
2678 #else
2679         errno = ENOSYS;
2680         return -1;
2681 #endif
2682 }
2683
2684 static struct file_id vfswrap_file_id_create(struct vfs_handle_struct *handle,
2685                                              const SMB_STRUCT_STAT *sbuf)
2686 {
2687         struct file_id key;
2688
2689         /* the ZERO_STRUCT ensures padding doesn't break using the key as a
2690          * blob */
2691         ZERO_STRUCT(key);
2692
2693         key.devid = sbuf->st_ex_dev;
2694         key.inode = sbuf->st_ex_ino;
2695         /* key.extid is unused by default. */
2696
2697         return key;
2698 }
2699
2700 static NTSTATUS vfswrap_streaminfo(vfs_handle_struct *handle,
2701                                    struct files_struct *fsp,
2702                                    const struct smb_filename *smb_fname,
2703                                    TALLOC_CTX *mem_ctx,
2704                                    unsigned int *pnum_streams,
2705                                    struct stream_struct **pstreams)
2706 {
2707         SMB_STRUCT_STAT sbuf;
2708         struct stream_struct *tmp_streams = NULL;
2709         int ret;
2710
2711         if ((fsp != NULL) && (fsp->is_directory)) {
2712                 /*
2713                  * No default streams on directories
2714                  */
2715                 goto done;
2716         }
2717
2718         if ((fsp != NULL) && (fsp->fh->fd != -1)) {
2719                 ret = SMB_VFS_FSTAT(fsp, &sbuf);
2720         }
2721         else {
2722                 struct smb_filename smb_fname_cp;
2723
2724                 ZERO_STRUCT(smb_fname_cp);
2725                 smb_fname_cp.base_name = discard_const_p(char,
2726                                         smb_fname->base_name);
2727                 smb_fname_cp.flags = smb_fname->flags;
2728
2729                 if (smb_fname_cp.flags & SMB_FILENAME_POSIX_PATH) {
2730                         ret = SMB_VFS_LSTAT(handle->conn, &smb_fname_cp);
2731                 } else {
2732                         ret = SMB_VFS_STAT(handle->conn, &smb_fname_cp);
2733                 }
2734                 sbuf = smb_fname_cp.st;
2735         }
2736
2737         if (ret == -1) {
2738                 return map_nt_error_from_unix(errno);
2739         }
2740
2741         if (S_ISDIR(sbuf.st_ex_mode)) {
2742                 goto done;
2743         }
2744
2745         tmp_streams = talloc_realloc(mem_ctx, *pstreams, struct stream_struct,
2746                                         (*pnum_streams) + 1);
2747         if (tmp_streams == NULL) {
2748                 return NT_STATUS_NO_MEMORY;
2749         }
2750         tmp_streams[*pnum_streams].name = talloc_strdup(tmp_streams, "::$DATA");
2751         if (tmp_streams[*pnum_streams].name == NULL) {
2752                 return NT_STATUS_NO_MEMORY;
2753         }
2754         tmp_streams[*pnum_streams].size = sbuf.st_ex_size;
2755         tmp_streams[*pnum_streams].alloc_size = SMB_VFS_GET_ALLOC_SIZE(handle->conn, fsp, &sbuf);
2756
2757         *pnum_streams += 1;
2758         *pstreams = tmp_streams;
2759  done:
2760         return NT_STATUS_OK;
2761 }
2762
2763 static int vfswrap_get_real_filename(struct vfs_handle_struct *handle,
2764                                      const char *path,
2765                                      const char *name,
2766                                      TALLOC_CTX *mem_ctx,
2767                                      char **found_name)
2768 {
2769         /*
2770          * Don't fall back to get_real_filename so callers can differentiate
2771          * between a full directory scan and an actual case-insensitive stat.
2772          */
2773         errno = EOPNOTSUPP;
2774         return -1;
2775 }
2776
2777 static const char *vfswrap_connectpath(struct vfs_handle_struct *handle,
2778                                    const struct smb_filename *smb_fname)
2779 {
2780         return handle->conn->connectpath;
2781 }
2782
2783 static NTSTATUS vfswrap_brl_lock_windows(struct vfs_handle_struct *handle,
2784                                          struct byte_range_lock *br_lck,
2785                                          struct lock_struct *plock,
2786                                          bool blocking_lock)
2787 {
2788         SMB_ASSERT(plock->lock_flav == WINDOWS_LOCK);
2789
2790         /* Note: blr is not used in the default implementation. */
2791         return brl_lock_windows_default(br_lck, plock, blocking_lock);
2792 }
2793
2794 static bool vfswrap_brl_unlock_windows(struct vfs_handle_struct *handle,
2795                                        struct messaging_context *msg_ctx,
2796                                        struct byte_range_lock *br_lck,
2797                                        const struct lock_struct *plock)
2798 {
2799         SMB_ASSERT(plock->lock_flav == WINDOWS_LOCK);
2800
2801         return brl_unlock_windows_default(msg_ctx, br_lck, plock);
2802 }
2803
2804 static bool vfswrap_brl_cancel_windows(struct vfs_handle_struct *handle,
2805                                        struct byte_range_lock *br_lck,
2806                                        struct lock_struct *plock)
2807 {
2808         SMB_ASSERT(plock->lock_flav == WINDOWS_LOCK);
2809
2810         /* Note: blr is not used in the default implementation. */
2811         return brl_lock_cancel_default(br_lck, plock);
2812 }
2813
2814 static bool vfswrap_strict_lock_check(struct vfs_handle_struct *handle,
2815                                       files_struct *fsp,
2816                                       struct lock_struct *plock)
2817 {
2818         SMB_ASSERT(plock->lock_type == READ_LOCK ||
2819             plock->lock_type == WRITE_LOCK);
2820
2821         return strict_lock_check_default(fsp, plock);
2822 }
2823
2824 /* NT ACL operations. */
2825
2826 static NTSTATUS vfswrap_fget_nt_acl(vfs_handle_struct *handle,
2827                                     files_struct *fsp,
2828                                     uint32_t security_info,
2829                                     TALLOC_CTX *mem_ctx,
2830                                     struct security_descriptor **ppdesc)
2831 {
2832         NTSTATUS result;
2833
2834         START_PROFILE(fget_nt_acl);
2835         result = posix_fget_nt_acl(fsp, security_info,
2836                                    mem_ctx, ppdesc);
2837         END_PROFILE(fget_nt_acl);
2838         return result;
2839 }
2840
2841 static NTSTATUS vfswrap_get_nt_acl(vfs_handle_struct *handle,
2842                                    const struct smb_filename *smb_fname,
2843                                    uint32_t security_info,
2844                                    TALLOC_CTX *mem_ctx,
2845                                    struct security_descriptor **ppdesc)
2846 {
2847         NTSTATUS result;
2848
2849         START_PROFILE(get_nt_acl);
2850         result = posix_get_nt_acl(handle->conn,
2851                                 smb_fname,
2852                                 security_info,
2853                                 mem_ctx,
2854                                 ppdesc);
2855         END_PROFILE(get_nt_acl);
2856         return result;
2857 }
2858
2859 static NTSTATUS vfswrap_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp, uint32_t security_info_sent, const struct security_descriptor *psd)
2860 {
2861         NTSTATUS result;
2862
2863         START_PROFILE(fset_nt_acl);
2864         result = set_nt_acl(fsp, security_info_sent, psd);
2865         END_PROFILE(fset_nt_acl);
2866         return result;
2867 }
2868
2869 static NTSTATUS vfswrap_audit_file(struct vfs_handle_struct *handle,
2870                                    struct smb_filename *file,
2871                                    struct security_acl *sacl,
2872                                    uint32_t access_requested,
2873                                    uint32_t access_denied)
2874 {
2875         return NT_STATUS_OK; /* Nothing to do here ... */
2876 }
2877
2878 static SMB_ACL_T vfswrap_sys_acl_get_file(vfs_handle_struct *handle,
2879                                           const struct smb_filename *smb_fname,
2880                                           SMB_ACL_TYPE_T type,
2881                                           TALLOC_CTX *mem_ctx)
2882 {
2883         return sys_acl_get_file(handle, smb_fname, type, mem_ctx);
2884 }
2885
2886 static SMB_ACL_T vfswrap_sys_acl_get_fd(vfs_handle_struct *handle,
2887                                         files_struct *fsp,
2888                                         TALLOC_CTX *mem_ctx)
2889 {
2890         return sys_acl_get_fd(handle, fsp, mem_ctx);
2891 }
2892
2893 static int vfswrap_sys_acl_set_file(vfs_handle_struct *handle,
2894                                 const struct smb_filename *smb_fname,
2895                                 SMB_ACL_TYPE_T acltype,
2896                                 SMB_ACL_T theacl)
2897 {
2898         return sys_acl_set_file(handle, smb_fname, acltype, theacl);
2899 }
2900
2901 static int vfswrap_sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp, SMB_ACL_T theacl)
2902 {
2903         return sys_acl_set_fd(handle, fsp, theacl);
2904 }
2905
2906 static int vfswrap_sys_acl_delete_def_file(vfs_handle_struct *handle,
2907                         const struct smb_filename *smb_fname)
2908 {
2909         return sys_acl_delete_def_file(handle, smb_fname);
2910 }
2911
2912 /****************************************************************
2913  Extended attribute operations.
2914 *****************************************************************/
2915
2916 static ssize_t vfswrap_getxattr(struct vfs_handle_struct *handle,
2917                         const struct smb_filename *smb_fname,
2918                         const char *name,
2919                         void *value,
2920                         size_t size)
2921 {
2922         return getxattr(smb_fname->base_name, name, value, size);
2923 }
2924
2925 struct vfswrap_getxattrat_state {
2926         struct tevent_context *ev;
2927         files_struct *dir_fsp;
2928         const struct smb_filename *smb_fname;
2929         struct tevent_req *req;
2930
2931         /*
2932          * The following variables are talloced off "state" which is protected
2933          * by a destructor and thus are guaranteed to be safe to be used in the
2934          * job function in the worker thread.
2935          */
2936         char *name;
2937         const char *xattr_name;
2938         uint8_t *xattr_value;
2939         struct security_unix_token *token;
2940
2941         ssize_t xattr_size;
2942         struct vfs_aio_state vfs_aio_state;
2943         SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
2944 };
2945
2946 static int vfswrap_getxattrat_state_destructor(
2947                 struct vfswrap_getxattrat_state *state)
2948 {
2949         return -1;
2950 }
2951
2952 static void vfswrap_getxattrat_do_sync(struct tevent_req *req);
2953 static void vfswrap_getxattrat_do_async(void *private_data);
2954 static void vfswrap_getxattrat_done(struct tevent_req *subreq);
2955
2956 static struct tevent_req *vfswrap_getxattrat_send(
2957                         TALLOC_CTX *mem_ctx,
2958                         struct tevent_context *ev,
2959                         struct vfs_handle_struct *handle,
2960                         files_struct *dir_fsp,
2961                         const struct smb_filename *smb_fname,
2962                         const char *xattr_name,
2963                         size_t alloc_hint)
2964 {
2965         struct tevent_req *req = NULL;
2966         struct tevent_req *subreq = NULL;
2967         struct vfswrap_getxattrat_state *state = NULL;
2968         size_t max_threads = 0;
2969         bool have_per_thread_cwd = false;
2970         bool have_per_thread_creds = false;
2971         bool do_async = false;
2972
2973         req = tevent_req_create(mem_ctx, &state,
2974                                 struct vfswrap_getxattrat_state);
2975         if (req == NULL) {
2976                 return NULL;
2977         }
2978         *state = (struct vfswrap_getxattrat_state) {
2979                 .ev = ev,
2980                 .dir_fsp = dir_fsp,
2981                 .smb_fname = smb_fname,
2982                 .req = req,
2983         };
2984
2985         max_threads = pthreadpool_tevent_max_threads(dir_fsp->conn->sconn->pool);
2986         if (max_threads >= 1) {
2987                 /*
2988                  * We need a non sync threadpool!
2989                  */
2990                 have_per_thread_cwd = per_thread_cwd_supported();
2991         }
2992 #ifdef HAVE_LINUX_THREAD_CREDENTIALS
2993         have_per_thread_creds = true;
2994 #endif
2995         if (have_per_thread_cwd && have_per_thread_creds) {
2996                 do_async = true;
2997         }
2998
2999         SMBPROFILE_BYTES_ASYNC_START(syscall_asys_getxattrat, profile_p,
3000                                      state->profile_bytes, 0);
3001
3002         if (dir_fsp->fh->fd == -1) {
3003                 DBG_ERR("Need a valid directory fd\n");
3004                 tevent_req_error(req, EINVAL);
3005                 return tevent_req_post(req, ev);
3006         }
3007
3008         if (alloc_hint > 0) {
3009                 state->xattr_value = talloc_zero_array(state,
3010                                                        uint8_t,
3011                                                        alloc_hint);
3012                 if (tevent_req_nomem(state->xattr_value, req)) {
3013                         return tevent_req_post(req, ev);
3014                 }
3015         }
3016
3017         if (!do_async) {
3018                 vfswrap_getxattrat_do_sync(req);
3019                 return tevent_req_post(req, ev);
3020         }
3021
3022         /*
3023          * Now allocate all parameters from a memory context that won't go away
3024          * no matter what. These paremeters will get used in threads and we
3025          * can't reliably cancel threads, so all buffers passed to the threads
3026          * must not be freed before all referencing threads terminate.
3027          */
3028
3029         state->name = talloc_strdup(state, smb_fname->base_name);
3030         if (tevent_req_nomem(state->name, req)) {
3031                 return tevent_req_post(req, ev);
3032         }
3033
3034         state->xattr_name = talloc_strdup(state, xattr_name);
3035         if (tevent_req_nomem(state->xattr_name, req)) {
3036                 return tevent_req_post(req, ev);
3037         }
3038
3039         /*
3040          * This is a hot codepath so at first glance one might think we should
3041          * somehow optimize away the token allocation and do a
3042          * talloc_reference() or similar black magic instead. But due to the
3043          * talloc_stackframe pool per SMB2 request this should be a simple copy
3044          * without a malloc in most cases.
3045          */
3046         if (geteuid() == sec_initial_uid()) {
3047                 state->token = root_unix_token(state);
3048         } else {
3049                 state->token = copy_unix_token(
3050                                         state,
3051                                         dir_fsp->conn->session_info->unix_token);
3052         }
3053         if (tevent_req_nomem(state->token, req)) {
3054                 return tevent_req_post(req, ev);
3055         }
3056
3057         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
3058
3059         subreq = pthreadpool_tevent_job_send(
3060                         state,
3061                         ev,
3062                         dir_fsp->conn->sconn->pool,
3063                         vfswrap_getxattrat_do_async,
3064                         state);
3065         if (tevent_req_nomem(subreq, req)) {
3066                 return tevent_req_post(req, ev);
3067         }
3068         tevent_req_set_callback(subreq, vfswrap_getxattrat_done, req);
3069
3070         talloc_set_destructor(state, vfswrap_getxattrat_state_destructor);
3071
3072         return req;
3073 }
3074
3075 static void vfswrap_getxattrat_do_sync(struct tevent_req *req)
3076 {
3077         struct vfswrap_getxattrat_state *state = talloc_get_type_abort(
3078                 req, struct vfswrap_getxattrat_state);
3079         char *path = NULL;
3080         char *tofree = NULL;
3081         char pathbuf[PATH_MAX+1];
3082         size_t pathlen;
3083         int err;
3084
3085         pathlen = full_path_tos(state->dir_fsp->fsp_name->base_name,
3086                                 state->smb_fname->base_name,
3087                                 pathbuf,
3088                                 sizeof(pathbuf),
3089                                 &path,
3090                                 &tofree);
3091         if (pathlen == -1) {
3092                 tevent_req_error(req, ENOMEM);
3093                 return;
3094         }
3095
3096         state->xattr_size = getxattr(path,
3097                                      state->xattr_name,
3098                                      state->xattr_value,
3099                                      talloc_array_length(state->xattr_value));
3100         err = errno;
3101         TALLOC_FREE(tofree);
3102         if (state->xattr_size == -1) {
3103                 tevent_req_error(req, err);
3104                 return;
3105         }
3106
3107         tevent_req_done(req);
3108         return;
3109 }
3110
3111 static void vfswrap_getxattrat_do_async(void *private_data)
3112 {
3113         struct vfswrap_getxattrat_state *state = talloc_get_type_abort(
3114                 private_data, struct vfswrap_getxattrat_state);
3115         struct timespec start_time;
3116         struct timespec end_time;
3117         int ret;
3118
3119         PROFILE_TIMESTAMP(&start_time);
3120         SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
3121
3122         /*
3123          * Here we simulate a getxattrat()
3124          * call using fchdir();getxattr()
3125          */
3126
3127         per_thread_cwd_activate();
3128
3129         /* Become the correct credential on this thread. */
3130         ret = set_thread_credentials(state->token->uid,
3131                                      state->token->gid,
3132                                      (size_t)state->token->ngroups,
3133                                      state->token->groups);
3134         if (ret != 0) {
3135                 state->xattr_size = -1;
3136                 state->vfs_aio_state.error = errno;
3137                 goto end_profile;
3138         }
3139
3140         ret = fchdir(state->dir_fsp->fh->fd);
3141         if (ret == -1) {
3142                 state->xattr_size = -1;
3143                 state->vfs_aio_state.error = errno;
3144                 goto end_profile;
3145         }
3146
3147         state->xattr_size = getxattr(state->name,
3148                                      state->xattr_name,
3149                                      state->xattr_value,
3150                                      talloc_array_length(state->xattr_value));
3151         if (state->xattr_size == -1) {
3152                 state->vfs_aio_state.error = errno;
3153         }
3154
3155 end_profile:
3156         PROFILE_TIMESTAMP(&end_time);
3157         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
3158         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
3159 }
3160
3161 static void vfswrap_getxattrat_done(struct tevent_req *subreq)
3162 {
3163         struct tevent_req *req = tevent_req_callback_data(
3164                 subreq, struct tevent_req);
3165         struct vfswrap_getxattrat_state *state = tevent_req_data(
3166                 req, struct vfswrap_getxattrat_state);
3167         int ret;
3168         bool ok;
3169
3170         /*
3171          * Make sure we run as the user again
3172          */
3173         ok = change_to_user_by_fsp(state->dir_fsp);
3174         SMB_ASSERT(ok);
3175
3176         ret = pthreadpool_tevent_job_recv(subreq);
3177         TALLOC_FREE(subreq);
3178         SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
3179         talloc_set_destructor(state, NULL);
3180         if (ret != 0) {
3181                 if (ret != EAGAIN) {
3182                         tevent_req_error(req, ret);
3183                         return;
3184                 }
3185                 /*
3186                  * If we get EAGAIN from pthreadpool_tevent_job_recv() this
3187                  * means the lower level pthreadpool failed to create a new
3188                  * thread. Fallback to sync processing in that case to allow
3189                  * some progress for the client.
3190                  */
3191                 vfswrap_getxattrat_do_sync(req);
3192                 return;
3193         }
3194
3195         if (state->xattr_size == -1) {
3196                 tevent_req_error(req, state->vfs_aio_state.error);
3197                 return;
3198         }
3199
3200         if (state->xattr_value == NULL) {
3201                 /*
3202                  * The caller only wanted the size.
3203                  */
3204                 tevent_req_done(req);
3205                 return;
3206         }
3207
3208         /*
3209          * shrink the buffer to the returned size.
3210          * (can't fail). It means NULL if size is 0.
3211          */
3212         state->xattr_value = talloc_realloc(state,
3213                                             state->xattr_value,
3214                                             uint8_t,
3215                                             state->xattr_size);
3216
3217         tevent_req_done(req);
3218 }
3219
3220 static ssize_t vfswrap_getxattrat_recv(struct tevent_req *req,
3221                                        struct vfs_aio_state *aio_state,
3222                                        TALLOC_CTX *mem_ctx,
3223                                        uint8_t **xattr_value)
3224 {
3225         struct vfswrap_getxattrat_state *state = tevent_req_data(
3226                 req, struct vfswrap_getxattrat_state);
3227         ssize_t xattr_size;
3228
3229         if (tevent_req_is_unix_error(req, &aio_state->error)) {
3230                 tevent_req_received(req);
3231                 return -1;
3232         }
3233
3234         *aio_state = state->vfs_aio_state;
3235         xattr_size = state->xattr_size;
3236         if (xattr_value != NULL) {
3237                 *xattr_value = talloc_move(mem_ctx, &state->xattr_value);
3238         }
3239
3240         tevent_req_received(req);
3241         return xattr_size;
3242 }
3243
3244 static ssize_t vfswrap_fgetxattr(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name, void *value, size_t size)
3245 {
3246         return fgetxattr(fsp->fh->fd, name, value, size);
3247 }
3248
3249 static ssize_t vfswrap_listxattr(struct vfs_handle_struct *handle,
3250                         const struct smb_filename *smb_fname,
3251                         char *list,
3252                         size_t size)
3253 {
3254         return listxattr(smb_fname->base_name, list, size);
3255 }
3256
3257 static ssize_t vfswrap_flistxattr(struct vfs_handle_struct *handle, struct files_struct *fsp, char *list, size_t size)
3258 {
3259         return flistxattr(fsp->fh->fd, list, size);
3260 }
3261
3262 static int vfswrap_removexattr(struct vfs_handle_struct *handle,
3263                                 const struct smb_filename *smb_fname,
3264                                 const char *name)
3265 {
3266         return removexattr(smb_fname->base_name, name);
3267 }
3268
3269 static int vfswrap_fremovexattr(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name)
3270 {
3271         return fremovexattr(fsp->fh->fd, name);
3272 }
3273
3274 static int vfswrap_setxattr(struct vfs_handle_struct *handle,
3275                                 const struct smb_filename *smb_fname,
3276                                 const char *name,
3277                                 const void *value,
3278                                 size_t size,
3279                                 int flags)
3280 {
3281         return setxattr(smb_fname->base_name, name, value, size, flags);
3282 }
3283
3284 static int vfswrap_fsetxattr(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name, const void *value, size_t size, int flags)
3285 {
3286         return fsetxattr(fsp->fh->fd, name, value, size, flags);
3287 }
3288
3289 static bool vfswrap_aio_force(struct vfs_handle_struct *handle, struct files_struct *fsp)
3290 {
3291         return false;
3292 }
3293
3294 static bool vfswrap_is_offline(struct vfs_handle_struct *handle,
3295                                const struct smb_filename *fname,
3296                                SMB_STRUCT_STAT *sbuf)
3297 {
3298         NTSTATUS status;
3299         char *path;
3300         bool offline = false;
3301
3302         if (ISDOT(fname->base_name) || ISDOTDOT(fname->base_name)) {
3303                 return false;
3304         }
3305
3306         if (!lp_dmapi_support(SNUM(handle->conn)) || !dmapi_have_session()) {
3307 #if defined(ENOTSUP)
3308                 errno = ENOTSUP;
3309 #endif
3310                 return false;
3311         }
3312
3313         status = get_full_smb_filename(talloc_tos(), fname, &path);
3314         if (!NT_STATUS_IS_OK(status)) {
3315                 errno = map_errno_from_nt_status(status);
3316                 return false;
3317         }
3318
3319         offline = (dmapi_file_flags(path) & FILE_ATTRIBUTE_OFFLINE) != 0;
3320
3321         TALLOC_FREE(path);
3322
3323         return offline;
3324 }
3325
3326 static NTSTATUS vfswrap_durable_cookie(struct vfs_handle_struct *handle,
3327                                        struct files_struct *fsp,
3328                                        TALLOC_CTX *mem_ctx,
3329                                        DATA_BLOB *cookie)
3330 {
3331         return vfs_default_durable_cookie(fsp, mem_ctx, cookie);
3332 }
3333
3334 static NTSTATUS vfswrap_durable_disconnect(struct vfs_handle_struct *handle,
3335                                            struct files_struct *fsp,
3336                                            const DATA_BLOB old_cookie,
3337                                            TALLOC_CTX *mem_ctx,
3338                                            DATA_BLOB *new_cookie)
3339 {
3340         return vfs_default_durable_disconnect(fsp, old_cookie, mem_ctx,
3341                                               new_cookie);
3342 }
3343
3344 static NTSTATUS vfswrap_durable_reconnect(struct vfs_handle_struct *handle,
3345                                           struct smb_request *smb1req,
3346                                           struct smbXsrv_open *op,
3347                                           const DATA_BLOB old_cookie,
3348                                           TALLOC_CTX *mem_ctx,
3349                                           struct files_struct **fsp,
3350                                           DATA_BLOB *new_cookie)
3351 {
3352         return vfs_default_durable_reconnect(handle->conn, smb1req, op,
3353                                              old_cookie, mem_ctx,
3354                                              fsp, new_cookie);
3355 }
3356
3357 static struct vfs_fn_pointers vfs_default_fns = {
3358         /* Disk operations */
3359
3360         .connect_fn = vfswrap_connect,
3361         .disconnect_fn = vfswrap_disconnect,
3362         .disk_free_fn = vfswrap_disk_free,
3363         .get_quota_fn = vfswrap_get_quota,
3364         .set_quota_fn = vfswrap_set_quota,
3365         .get_shadow_copy_data_fn = vfswrap_get_shadow_copy_data,
3366         .statvfs_fn = vfswrap_statvfs,
3367         .fs_capabilities_fn = vfswrap_fs_capabilities,
3368         .get_dfs_referrals_fn = vfswrap_get_dfs_referrals,
3369         .snap_check_path_fn = vfswrap_snap_check_path,
3370         .snap_create_fn = vfswrap_snap_create,
3371         .snap_delete_fn = vfswrap_snap_delete,
3372
3373         /* Directory operations */
3374
3375         .opendir_fn = vfswrap_opendir,
3376         .fdopendir_fn = vfswrap_fdopendir,
3377         .readdir_fn = vfswrap_readdir,
3378         .readdir_attr_fn = vfswrap_readdir_attr,
3379         .seekdir_fn = vfswrap_seekdir,
3380         .telldir_fn = vfswrap_telldir,
3381         .rewind_dir_fn = vfswrap_rewinddir,
3382         .mkdir_fn = vfswrap_mkdir,
3383         .rmdir_fn = vfswrap_rmdir,
3384         .closedir_fn = vfswrap_closedir,
3385
3386         /* File operations */
3387
3388         .open_fn = vfswrap_open,
3389         .create_file_fn = vfswrap_create_file,
3390         .close_fn = vfswrap_close,
3391         .pread_fn = vfswrap_pread,
3392         .pread_send_fn = vfswrap_pread_send,
3393         .pread_recv_fn = vfswrap_pread_recv,
3394         .pwrite_fn = vfswrap_pwrite,
3395         .pwrite_send_fn = vfswrap_pwrite_send,
3396         .pwrite_recv_fn = vfswrap_pwrite_recv,
3397         .lseek_fn = vfswrap_lseek,
3398         .sendfile_fn = vfswrap_sendfile,
3399         .recvfile_fn = vfswrap_recvfile,
3400         .rename_fn = vfswrap_rename,
3401         .fsync_send_fn = vfswrap_fsync_send,
3402         .fsync_recv_fn = vfswrap_fsync_recv,
3403         .stat_fn = vfswrap_stat,
3404         .fstat_fn = vfswrap_fstat,
3405         .lstat_fn = vfswrap_lstat,
3406         .get_alloc_size_fn = vfswrap_get_alloc_size,
3407         .unlink_fn = vfswrap_unlink,
3408         .chmod_fn = vfswrap_chmod,
3409         .fchmod_fn = vfswrap_fchmod,
3410         .chown_fn = vfswrap_chown,
3411         .fchown_fn = vfswrap_fchown,
3412         .lchown_fn = vfswrap_lchown,
3413         .chdir_fn = vfswrap_chdir,
3414         .getwd_fn = vfswrap_getwd,
3415         .ntimes_fn = vfswrap_ntimes,
3416         .ftruncate_fn = vfswrap_ftruncate,
3417         .fallocate_fn = vfswrap_fallocate,
3418         .lock_fn = vfswrap_lock,
3419         .kernel_flock_fn = vfswrap_kernel_flock,
3420         .linux_setlease_fn = vfswrap_linux_setlease,
3421         .getlock_fn = vfswrap_getlock,
3422         .symlink_fn = vfswrap_symlink,
3423         .readlink_fn = vfswrap_readlink,
3424         .link_fn = vfswrap_link,
3425         .mknod_fn = vfswrap_mknod,
3426         .realpath_fn = vfswrap_realpath,
3427         .chflags_fn = vfswrap_chflags,
3428         .file_id_create_fn = vfswrap_file_id_create,
3429         .streaminfo_fn = vfswrap_streaminfo,
3430         .get_real_filename_fn = vfswrap_get_real_filename,
3431         .connectpath_fn = vfswrap_connectpath,
3432         .brl_lock_windows_fn = vfswrap_brl_lock_windows,
3433         .brl_unlock_windows_fn = vfswrap_brl_unlock_windows,
3434         .brl_cancel_windows_fn = vfswrap_brl_cancel_windows,
3435         .strict_lock_check_fn = vfswrap_strict_lock_check,
3436         .translate_name_fn = vfswrap_translate_name,
3437         .fsctl_fn = vfswrap_fsctl,
3438         .set_dos_attributes_fn = vfswrap_set_dos_attributes,
3439         .fset_dos_attributes_fn = vfswrap_fset_dos_attributes,
3440         .get_dos_attributes_fn = vfswrap_get_dos_attributes,
3441         .get_dos_attributes_send_fn = vfswrap_get_dos_attributes_send,
3442         .get_dos_attributes_recv_fn = vfswrap_get_dos_attributes_recv,
3443         .fget_dos_attributes_fn = vfswrap_fget_dos_attributes,
3444         .offload_read_send_fn = vfswrap_offload_read_send,
3445         .offload_read_recv_fn = vfswrap_offload_read_recv,
3446         .offload_write_send_fn = vfswrap_offload_write_send,
3447         .offload_write_recv_fn = vfswrap_offload_write_recv,
3448         .get_compression_fn = vfswrap_get_compression,
3449         .set_compression_fn = vfswrap_set_compression,
3450
3451         /* NT ACL operations. */
3452
3453         .fget_nt_acl_fn = vfswrap_fget_nt_acl,
3454         .get_nt_acl_fn = vfswrap_get_nt_acl,
3455         .fset_nt_acl_fn = vfswrap_fset_nt_acl,
3456         .audit_file_fn = vfswrap_audit_file,
3457
3458         /* POSIX ACL operations. */
3459
3460         .sys_acl_get_file_fn = vfswrap_sys_acl_get_file,
3461         .sys_acl_get_fd_fn = vfswrap_sys_acl_get_fd,
3462         .sys_acl_blob_get_file_fn = posix_sys_acl_blob_get_file,
3463         .sys_acl_blob_get_fd_fn = posix_sys_acl_blob_get_fd,
3464         .sys_acl_set_file_fn = vfswrap_sys_acl_set_file,
3465         .sys_acl_set_fd_fn = vfswrap_sys_acl_set_fd,
3466         .sys_acl_delete_def_file_fn = vfswrap_sys_acl_delete_def_file,
3467
3468         /* EA operations. */
3469         .getxattr_fn = vfswrap_getxattr,
3470         .getxattrat_send_fn = vfswrap_getxattrat_send,
3471         .getxattrat_recv_fn = vfswrap_getxattrat_recv,
3472         .fgetxattr_fn = vfswrap_fgetxattr,
3473         .listxattr_fn = vfswrap_listxattr,
3474         .flistxattr_fn = vfswrap_flistxattr,
3475         .removexattr_fn = vfswrap_removexattr,
3476         .fremovexattr_fn = vfswrap_fremovexattr,
3477         .setxattr_fn = vfswrap_setxattr,
3478         .fsetxattr_fn = vfswrap_fsetxattr,
3479
3480         /* aio operations */
3481         .aio_force_fn = vfswrap_aio_force,
3482
3483         /* durable handle operations */
3484         .durable_cookie_fn = vfswrap_durable_cookie,
3485         .durable_disconnect_fn = vfswrap_durable_disconnect,
3486         .durable_reconnect_fn = vfswrap_durable_reconnect,
3487 };
3488
3489 static_decl_vfs;
3490 NTSTATUS vfs_default_init(TALLOC_CTX *ctx)
3491 {
3492         /*
3493          * Here we need to implement every call!
3494          *
3495          * As this is the end of the vfs module chain.
3496          */
3497         smb_vfs_assert_all_fns(&vfs_default_fns, DEFAULT_VFS_MODULE_NAME);
3498         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
3499                                 DEFAULT_VFS_MODULE_NAME, &vfs_default_fns);
3500 }
3501
3502