source3/smbd/vfs.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 1.9.
   4    VFS initialisation and support functions
   5    Copyright (C) Tim Potter 1999
   6    Copyright (C) Alexander Bokovoy 2002
   7    Copyright (C) James Peach 2006
   8    Copyright (C) Volker Lendecke 2009
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22
  23    This work was sponsored by Optifacio Software Services, Inc.
  24 */
  25
  26 #include "includes.h"
  27 #include "system/filesys.h"
  28 #include "smbd/smbd.h"
  29 #include "smbd/globals.h"
  30 #include "../lib/util/memcache.h"
  31 #include "transfer_file.h"
  32 #include "ntioctl.h"
  33 #include "lib/util/tevent_unix.h"
  34 #include "lib/util/tevent_ntstatus.h"
  35 #include "lib/util/sys_rw.h"
  36
  37 #undef DBGC_CLASS
  38 #define DBGC_CLASS DBGC_VFS
  39
  40 static_decl_vfs;
  41
  42 struct vfs_fsp_data {
  43     struct vfs_fsp_data *next;
  44     struct vfs_handle_struct *owner;
  45     void (*destroy)(void *p_data);
  46     void *_dummy_;
  47     /* NOTE: This structure contains four pointers so that we can guarantee
  48      * that the end of the structure is always both 4-byte and 8-byte aligned.
  49      */
  50 };
  51
  52 struct vfs_init_function_entry {
  53         char *name;
  54         struct vfs_init_function_entry *prev, *next;
  55         const struct vfs_fn_pointers *fns;
  56 };
  57
  58 /****************************************************************************
  59     maintain the list of available backends
  60 ****************************************************************************/
  61
  62 static struct vfs_init_function_entry *vfs_find_backend_entry(const char *name)
  63 {
  64         struct vfs_init_function_entry *entry = backends;
  65
  66         DEBUG(10, ("vfs_find_backend_entry called for %s\n", name));
  67
  68         while(entry) {
  69                 if (strcmp(entry->name, name)==0) return entry;
  70                 entry = entry->next;
  71         }
  72
  73         return NULL;
  74 }
  75
  76 NTSTATUS smb_register_vfs(int version, const char *name,
  77                           const struct vfs_fn_pointers *fns)
  78 {
  79         struct vfs_init_function_entry *entry = backends;
  80
  81         if ((version != SMB_VFS_INTERFACE_VERSION)) {
  82                 DEBUG(0, ("Failed to register vfs module.\n"
  83                           "The module was compiled against SMB_VFS_INTERFACE_VERSION %d,\n"
  84                           "current SMB_VFS_INTERFACE_VERSION is %d.\n"
  85                           "Please recompile against the current Samba Version!\n",
  86                           version, SMB_VFS_INTERFACE_VERSION));
  87                 return NT_STATUS_OBJECT_TYPE_MISMATCH;
  88         }
  89
  90         if (!name || !name[0]) {
  91                 DEBUG(0,("smb_register_vfs() called with NULL pointer or empty name!\n"));
  92                 return NT_STATUS_INVALID_PARAMETER;
  93         }
  94
  95         if (vfs_find_backend_entry(name)) {
  96                 DEBUG(0,("VFS module %s already loaded!\n", name));
  97                 return NT_STATUS_OBJECT_NAME_COLLISION;
  98         }
  99
 100         entry = SMB_XMALLOC_P(struct vfs_init_function_entry);
 101         entry->name = smb_xstrdup(name);
 102         entry->fns = fns;
 103
 104         DLIST_ADD(backends, entry);
 105         DEBUG(5, ("Successfully added vfs backend '%s'\n", name));
 106         return NT_STATUS_OK;
 107 }
 108
 109 /****************************************************************************
 110   initialise default vfs hooks
 111 ****************************************************************************/
 112
 113 static void vfs_init_default(connection_struct *conn)
 114 {
 115         DEBUG(3, ("Initialising default vfs hooks\n"));
 116         vfs_init_custom(conn, DEFAULT_VFS_MODULE_NAME);
 117 }
 118
 119 /****************************************************************************
 120   initialise custom vfs hooks
 121  ****************************************************************************/
 122
 123 bool vfs_init_custom(connection_struct *conn, const char *vfs_object)
 124 {
 125         char *module_path = NULL;
 126         char *module_name = NULL;
 127         char *module_param = NULL, *p;
 128         vfs_handle_struct *handle;
 129         const struct vfs_init_function_entry *entry;
 130
 131         if (!conn||!vfs_object||!vfs_object[0]) {
 132                 DEBUG(0, ("vfs_init_custom() called with NULL pointer or "
 133                           "empty vfs_object!\n"));
 134                 return False;
 135         }
 136
 137         if(!backends) {
 138                 static_init_vfs(NULL);
 139         }
 140
 141         DEBUG(3, ("Initialising custom vfs hooks from [%s]\n", vfs_object));
 142
 143         module_path = smb_xstrdup(vfs_object);
 144
 145         p = strchr_m(module_path, ':');
 146
 147         if (p) {
 148                 *p = 0;
 149                 module_param = p+1;
 150                 trim_char(module_param, ' ', ' ');
 151         }
 152
 153         trim_char(module_path, ' ', ' ');
 154
 155         module_name = smb_xstrdup(module_path);
 156
 157         if ((module_name[0] == '/') &&
 158             (strcmp(module_path, DEFAULT_VFS_MODULE_NAME) != 0)) {
 159
 160                 /*
 161                  * Extract the module name from the path. Just use the base
 162                  * name of the last path component.
 163                  */
 164
 165                 SAFE_FREE(module_name);
 166                 module_name = smb_xstrdup(strrchr_m(module_path, '/')+1);
 167
 168                 p = strchr_m(module_name, '.');
 169
 170                 if (p != NULL) {
 171                         *p = '\0';
 172                 }
 173         }
 174
 175         /* First, try to load the module with the new module system */
 176         entry = vfs_find_backend_entry(module_name);
 177         if (!entry) {
 178                 NTSTATUS status;
 179
 180                 DEBUG(5, ("vfs module [%s] not loaded - trying to load...\n",
 181                           vfs_object));
 182
 183                 status = smb_load_module("vfs", module_path);
 184                 if (!NT_STATUS_IS_OK(status)) {
 185                         DEBUG(0, ("error probing vfs module '%s': %s\n",
 186                                   module_path, nt_errstr(status)));
 187                         goto fail;
 188                 }
 189
 190                 entry = vfs_find_backend_entry(module_name);
 191                 if (!entry) {
 192                         DEBUG(0,("Can't find a vfs module [%s]\n",vfs_object));
 193                         goto fail;
 194                 }
 195         }
 196
 197         DEBUGADD(5,("Successfully loaded vfs module [%s] with the new modules system\n", vfs_object));
 198
 199         handle = talloc_zero(conn, vfs_handle_struct);
 200         if (!handle) {
 201                 DEBUG(0,("TALLOC_ZERO() failed!\n"));
 202                 goto fail;
 203         }
 204         handle->conn = conn;
 205         handle->fns = entry->fns;
 206         if (module_param) {
 207                 handle->param = talloc_strdup(conn, module_param);
 208         }
 209         DLIST_ADD(conn->vfs_handles, handle);
 210
 211         SAFE_FREE(module_path);
 212         SAFE_FREE(module_name);
 213         return True;
 214
 215  fail:
 216         SAFE_FREE(module_path);
 217         SAFE_FREE(module_name);
 218         return False;
 219 }
 220
 221 /*****************************************************************
 222  Allow VFS modules to extend files_struct with VFS-specific state.
 223  This will be ok for small numbers of extensions, but might need to
 224  be refactored if it becomes more widely used.
 225 ******************************************************************/
 226
 227 #define EXT_DATA_AREA(e) ((uint8_t *)(e) + sizeof(struct vfs_fsp_data))
 228
 229 void *vfs_add_fsp_extension_notype(vfs_handle_struct *handle,
 230                                    files_struct *fsp, size_t ext_size,
 231                                    void (*destroy_fn)(void *p_data))
 232 {
 233         struct vfs_fsp_data *ext;
 234         void * ext_data;
 235
 236         /* Prevent VFS modules adding multiple extensions. */
 237         if ((ext_data = vfs_fetch_fsp_extension(handle, fsp))) {
 238                 return ext_data;
 239         }
 240
 241         ext = talloc_zero_size(
 242                 handle->conn, sizeof(struct vfs_fsp_data) + ext_size);
 243         if (ext == NULL) {
 244                 return NULL;
 245         }
 246
 247         ext->owner = handle;
 248         ext->next = fsp->vfs_extension;
 249         ext->destroy = destroy_fn;
 250         fsp->vfs_extension = ext;
 251         return EXT_DATA_AREA(ext);
 252 }
 253
 254 void vfs_remove_fsp_extension(vfs_handle_struct *handle, files_struct *fsp)
 255 {
 256         struct vfs_fsp_data *curr;
 257         struct vfs_fsp_data *prev;
 258
 259         for (curr = fsp->vfs_extension, prev = NULL;
 260              curr;
 261              prev = curr, curr = curr->next) {
 262                 if (curr->owner == handle) {
 263                     if (prev) {
 264                             prev->next = curr->next;
 265                     } else {
 266                             fsp->vfs_extension = curr->next;
 267                     }
 268                     if (curr->destroy) {
 269                             curr->destroy(EXT_DATA_AREA(curr));
 270                     }
 271                     TALLOC_FREE(curr);
 272                     return;
 273                 }
 274         }
 275 }
 276
 277 void vfs_remove_all_fsp_extensions(files_struct *fsp)
 278 {
 279         struct vfs_fsp_data *curr;
 280         struct vfs_fsp_data *next;
 281
 282         for (curr = fsp->vfs_extension; curr; curr = next) {
 283
 284                 next = curr->next;
 285                 fsp->vfs_extension = next;
 286
 287                 if (curr->destroy) {
 288                         curr->destroy(EXT_DATA_AREA(curr));
 289                 }
 290                 TALLOC_FREE(curr);
 291         }
 292 }
 293
 294 void *vfs_memctx_fsp_extension(vfs_handle_struct *handle,
 295                                const struct files_struct *fsp)
 296 {
 297         struct vfs_fsp_data *head;
 298
 299         for (head = fsp->vfs_extension; head; head = head->next) {
 300                 if (head->owner == handle) {
 301                         return head;
 302                 }
 303         }
 304
 305         return NULL;
 306 }
 307
 308 void *vfs_fetch_fsp_extension(vfs_handle_struct *handle,
 309                               const struct files_struct *fsp)
 310 {
 311         struct vfs_fsp_data *head;
 312
 313         head = (struct vfs_fsp_data *)vfs_memctx_fsp_extension(handle, fsp);
 314         if (head != NULL) {
 315                 return EXT_DATA_AREA(head);
 316         }
 317
 318         return NULL;
 319 }
 320
 321 #undef EXT_DATA_AREA
 322
 323 /*
 324  * Ensure this module catches all VFS functions.
 325  */
 326 #ifdef DEVELOPER
 327 void smb_vfs_assert_all_fns(const struct vfs_fn_pointers* fns,
 328                             const char *module)
 329 {
 330         bool missing_fn = false;
 331         unsigned int idx;
 332         const uintptr_t *end = (const uintptr_t *)(fns + 1);
 333
 334         for (idx = 0; ((const uintptr_t *)fns + idx) < end; idx++) {
 335                 if (*((const uintptr_t *)fns + idx) == 0) {
 336                         DBG_ERR("VFS function at index %d not implemented "
 337                                 "in module %s\n", idx, module);
 338                         missing_fn = true;
 339                 }
 340         }
 341
 342         if (missing_fn) {
 343                 smb_panic("Required VFS function not implemented in module.\n");
 344         }
 345 }
 346 #else
 347 void smb_vfs_assert_all_fns(const struct vfs_fn_pointers* fns,
 348                             const char *module)
 349 {
 350 }
 351 #endif
 352
 353 /*****************************************************************
 354  Generic VFS init.
 355 ******************************************************************/
 356
 357 bool smbd_vfs_init(connection_struct *conn)
 358 {
 359         const char **vfs_objects;
 360         unsigned int i = 0;
 361         int j = 0;
 362
 363         /* Normal share - initialise with disk access functions */
 364         vfs_init_default(conn);
 365
 366         /* No need to load vfs modules for printer connections */
 367         if (conn->printer) {
 368                 return True;
 369         }
 370
 371         if (lp_widelinks(SNUM(conn))) {
 372                 /*
 373                  * As the widelinks logic is now moving into a
 374                  * vfs_widelinks module, we need to custom load
 375                  * it after the default module is initialized.
 376                  * That way no changes to smb.conf files are
 377                  * needed.
 378                  */
 379                 bool ok = vfs_init_custom(conn, "widelinks");
 380                 if (!ok) {
 381                         DBG_ERR("widelinks enabled and vfs_init_custom "
 382                                 "failed for vfs_widelinks module\n");
 383                         return false;
 384                 }
 385         }
 386
 387         vfs_objects = lp_vfs_objects(SNUM(conn));
 388
 389         /* Override VFS functions if 'vfs object' was not specified*/
 390         if (!vfs_objects || !vfs_objects[0])
 391                 return True;
 392
 393         for (i=0; vfs_objects[i] ;) {
 394                 i++;
 395         }
 396
 397         for (j=i-1; j >= 0; j--) {
 398                 if (!vfs_init_custom(conn, vfs_objects[j])) {
 399                         DEBUG(0, ("smbd_vfs_init: vfs_init_custom failed for %s\n", vfs_objects[j]));
 400                         return False;
 401                 }
 402         }
 403         return True;
 404 }
 405
 406 /*******************************************************************
 407  Check if a file exists in the vfs.
 408 ********************************************************************/
 409
 410 NTSTATUS vfs_file_exist(connection_struct *conn, struct smb_filename *smb_fname)
 411 {
 412         /* Only return OK if stat was successful and S_ISREG */
 413         if ((SMB_VFS_STAT(conn, smb_fname) != -1) &&
 414             S_ISREG(smb_fname->st.st_ex_mode)) {
 415                 return NT_STATUS_OK;
 416         }
 417
 418         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 419 }
 420
 421 bool vfs_valid_pread_range(off_t offset, size_t length)
 422 {
 423         return sys_valid_io_range(offset, length);
 424 }
 425
 426 bool vfs_valid_pwrite_range(off_t offset, size_t length)
 427 {
 428         /*
 429          * See MAXFILESIZE in [MS-FSA] 2.1.5.3 Server Requests a Write
 430          */
 431         static const uint64_t maxfilesize = 0xfffffff0000;
 432         uint64_t last_byte_ofs;
 433         bool ok;
 434
 435         ok = sys_valid_io_range(offset, length);
 436         if (!ok) {
 437                 return false;
 438         }
 439
 440         if (length == 0) {
 441                 return true;
 442         }
 443
 444         last_byte_ofs = offset + length;
 445         if (last_byte_ofs > maxfilesize) {
 446                 return false;
 447         }
 448
 449         return true;
 450 }
 451
 452 ssize_t vfs_pwrite_data(struct smb_request *req,
 453                         files_struct *fsp,
 454                         const char *buffer,
 455                         size_t N,
 456                         off_t offset)
 457 {
 458         size_t total=0;
 459         ssize_t ret;
 460         bool ok;
 461
 462         ok = vfs_valid_pwrite_range(offset, N);
 463         if (!ok) {
 464                 errno = EINVAL;
 465                 return -1;
 466         }
 467
 468         if (req && req->unread_bytes) {
 469                 int sockfd = req->xconn->transport.sock;
 470                 SMB_ASSERT(req->unread_bytes == N);
 471                 /* VFS_RECVFILE must drain the socket
 472                  * before returning. */
 473                 req->unread_bytes = 0;
 474                 /*
 475                  * Leave the socket non-blocking and
 476                  * use SMB_VFS_RECVFILE. If it returns
 477                  * EAGAIN || EWOULDBLOCK temporarily set
 478                  * the socket blocking and retry
 479                  * the RECVFILE.
 480                  */
 481                 while (total < N) {
 482                         ret = SMB_VFS_RECVFILE(sockfd,
 483                                                 fsp,
 484                                                 offset + total,
 485                                                 N - total);
 486                         if (ret == 0 || (ret == -1 &&
 487                                          (errno == EAGAIN ||
 488                                           errno == EWOULDBLOCK))) {
 489                                 int old_flags;
 490                                 /* Ensure the socket is blocking. */
 491                                 old_flags = fcntl(sockfd, F_GETFL, 0);
 492                                 if (set_blocking(sockfd, true) == -1) {
 493                                         return (ssize_t)-1;
 494                                 }
 495                                 ret = SMB_VFS_RECVFILE(sockfd,
 496                                                         fsp,
 497                                                         offset + total,
 498                                                         N - total);
 499                                 if (fcntl(sockfd, F_SETFL, old_flags) == -1) {
 500                                         return (ssize_t)-1;
 501                                 }
 502                                 if (ret == -1) {
 503                                         return (ssize_t)-1;
 504                                 }
 505                                 total += ret;
 506                                 return (ssize_t)total;
 507                         }
 508                         /* Any other error case. */
 509                         if (ret == -1) {
 510                                 return ret;
 511                         }
 512                         total += ret;
 513                 }
 514                 return (ssize_t)total;
 515         }
 516
 517         while (total < N) {
 518                 ret = SMB_VFS_PWRITE(fsp, buffer + total, N - total,
 519                                      offset + total);
 520
 521                 if (ret == -1)
 522                         return -1;
 523                 if (ret == 0)
 524                         return total;
 525
 526                 total += ret;
 527         }
 528         return (ssize_t)total;
 529 }
 530 /****************************************************************************
 531  An allocate file space call using the vfs interface.
 532  Allocates space for a file from a filedescriptor.
 533  Returns 0 on success, -1 on failure.
 534 ****************************************************************************/
 535
 536 int vfs_allocate_file_space(files_struct *fsp, uint64_t len)
 537 {
 538         int ret;
 539         connection_struct *conn = fsp->conn;
 540         uint64_t space_avail;
 541         uint64_t bsize,dfree,dsize;
 542         NTSTATUS status;
 543         bool ok;
 544
 545         /*
 546          * Actually try and commit the space on disk....
 547          */
 548
 549         DEBUG(10,("vfs_allocate_file_space: file %s, len %.0f\n",
 550                   fsp_str_dbg(fsp), (double)len));
 551
 552         ok = vfs_valid_pwrite_range((off_t)len, 0);
 553         if (!ok) {
 554                 DEBUG(0,("vfs_allocate_file_space: %s negative/invalid len "
 555                          "requested.\n", fsp_str_dbg(fsp)));
 556                 errno = EINVAL;
 557                 return -1;
 558         }
 559
 560         status = vfs_stat_fsp(fsp);
 561         if (!NT_STATUS_IS_OK(status)) {
 562                 return -1;
 563         }
 564
 565         if (len == (uint64_t)fsp->fsp_name->st.st_ex_size)
 566                 return 0;
 567
 568         if (len < (uint64_t)fsp->fsp_name->st.st_ex_size) {
 569                 /* Shrink - use ftruncate. */
 570
 571                 DEBUG(10,("vfs_allocate_file_space: file %s, shrink. Current "
 572                           "size %.0f\n", fsp_str_dbg(fsp),
 573                           (double)fsp->fsp_name->st.st_ex_size));
 574
 575                 contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_ALLOC_SHRINK);
 576
 577                 ret = SMB_VFS_FTRUNCATE(fsp, (off_t)len);
 578
 579                 contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_ALLOC_SHRINK);
 580
 581                 return ret;
 582         }
 583
 584         /* Grow - we need to test if we have enough space. */
 585
 586         contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_ALLOC_GROW);
 587
 588         if (lp_strict_allocate(SNUM(fsp->conn))) {
 589                 /* See if we have a syscall that will allocate beyond
 590                    end-of-file without changing EOF. */
 591                 ret = SMB_VFS_FALLOCATE(fsp, VFS_FALLOCATE_FL_KEEP_SIZE,
 592                                         0, len);
 593         } else {
 594                 ret = 0;
 595         }
 596
 597         contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_ALLOC_GROW);
 598
 599         if (ret == 0) {
 600                 /* We changed the allocation size on disk, but not
 601                    EOF - exactly as required. We're done ! */
 602                 return 0;
 603         }
 604
 605         if (ret == -1 && errno == ENOSPC) {
 606                 return -1;
 607         }
 608
 609         len -= fsp->fsp_name->st.st_ex_size;
 610         len /= 1024; /* Len is now number of 1k blocks needed. */
 611         space_avail =
 612             get_dfree_info(conn, fsp->fsp_name, &bsize, &dfree, &dsize);
 613         if (space_avail == (uint64_t)-1) {
 614                 return -1;
 615         }
 616
 617         DEBUG(10,("vfs_allocate_file_space: file %s, grow. Current size %.0f, "
 618                   "needed blocks = %.0f, space avail = %.0f\n",
 619                   fsp_str_dbg(fsp), (double)fsp->fsp_name->st.st_ex_size, (double)len,
 620                   (double)space_avail));
 621
 622         if (len > space_avail) {
 623                 errno = ENOSPC;
 624                 return -1;
 625         }
 626
 627         return 0;
 628 }
 629
 630 /****************************************************************************
 631  A vfs set_filelen call.
 632  set the length of a file from a filedescriptor.
 633  Returns 0 on success, -1 on failure.
 634 ****************************************************************************/
 635
 636 int vfs_set_filelen(files_struct *fsp, off_t len)
 637 {
 638         int ret;
 639         bool ok;
 640
 641         ok = vfs_valid_pwrite_range(len, 0);
 642         if (!ok) {
 643                 errno = EINVAL;
 644                 return -1;
 645         }
 646
 647         contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_SET_FILE_LEN);
 648
 649         DEBUG(10,("vfs_set_filelen: ftruncate %s to len %.0f\n",
 650                   fsp_str_dbg(fsp), (double)len));
 651         if ((ret = SMB_VFS_FTRUNCATE(fsp, len)) != -1) {
 652                 notify_fname(fsp->conn, NOTIFY_ACTION_MODIFIED,
 653                              FILE_NOTIFY_CHANGE_SIZE
 654                              | FILE_NOTIFY_CHANGE_ATTRIBUTES,
 655                              fsp->fsp_name->base_name);
 656         }
 657
 658         contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_SET_FILE_LEN);
 659
 660         return ret;
 661 }
 662
 663 /****************************************************************************
 664  A slow version of fallocate. Fallback code if SMB_VFS_FALLOCATE
 665  fails. Needs to be outside of the default version of SMB_VFS_FALLOCATE
 666  as this is also called from the default SMB_VFS_FTRUNCATE code.
 667  Always extends the file size.
 668  Returns 0 on success, -1 on failure.
 669 ****************************************************************************/
 670
 671 #define SPARSE_BUF_WRITE_SIZE (32*1024)
 672
 673 int vfs_slow_fallocate(files_struct *fsp, off_t offset, off_t len)
 674 {
 675         ssize_t pwrite_ret;
 676         size_t total = 0;
 677         bool ok;
 678
 679         ok = vfs_valid_pwrite_range(offset, len);
 680         if (!ok) {
 681                 errno = EINVAL;
 682                 return -1;
 683         }
 684
 685         if (!sparse_buf) {
 686                 sparse_buf = SMB_CALLOC_ARRAY(char, SPARSE_BUF_WRITE_SIZE);
 687                 if (!sparse_buf) {
 688                         errno = ENOMEM;
 689                         return -1;
 690                 }
 691         }
 692
 693         while (total < len) {
 694                 size_t curr_write_size = MIN(SPARSE_BUF_WRITE_SIZE, (len - total));
 695
 696                 pwrite_ret = SMB_VFS_PWRITE(fsp, sparse_buf, curr_write_size, offset + total);
 697                 if (pwrite_ret == -1) {
 698                         int saved_errno = errno;
 699                         DEBUG(10,("vfs_slow_fallocate: SMB_VFS_PWRITE for file "
 700                                   "%s failed with error %s\n",
 701                                   fsp_str_dbg(fsp), strerror(saved_errno)));
 702                         errno = saved_errno;
 703                         return -1;
 704                 }
 705                 total += pwrite_ret;
 706         }
 707
 708         return 0;
 709 }
 710
 711 /****************************************************************************
 712  A vfs fill sparse call.
 713  Writes zeros from the end of file to len, if len is greater than EOF.
 714  Used only by strict_sync.
 715  Returns 0 on success, -1 on failure.
 716 ****************************************************************************/
 717
 718 int vfs_fill_sparse(files_struct *fsp, off_t len)
 719 {
 720         int ret;
 721         NTSTATUS status;
 722         off_t offset;
 723         size_t num_to_write;
 724         bool ok;
 725
 726         ok = vfs_valid_pwrite_range(len, 0);
 727         if (!ok) {
 728                 errno = EINVAL;
 729                 return -1;
 730         }
 731
 732         status = vfs_stat_fsp(fsp);
 733         if (!NT_STATUS_IS_OK(status)) {
 734                 return -1;
 735         }
 736
 737         if (len <= fsp->fsp_name->st.st_ex_size) {
 738                 return 0;
 739         }
 740
 741 #ifdef S_ISFIFO
 742         if (S_ISFIFO(fsp->fsp_name->st.st_ex_mode)) {
 743                 return 0;
 744         }
 745 #endif
 746
 747         DEBUG(10,("vfs_fill_sparse: write zeros in file %s from len %.0f to "
 748                   "len %.0f (%.0f bytes)\n", fsp_str_dbg(fsp),
 749                   (double)fsp->fsp_name->st.st_ex_size, (double)len,
 750                   (double)(len - fsp->fsp_name->st.st_ex_size)));
 751
 752         contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_FILL_SPARSE);
 753
 754         offset = fsp->fsp_name->st.st_ex_size;
 755         num_to_write = len - fsp->fsp_name->st.st_ex_size;
 756
 757         /* Only do this on non-stream file handles. */
 758         if (!fsp_is_alternate_stream(fsp)) {
 759                 /* for allocation try fallocate first. This can fail on some
 760                  * platforms e.g. when the filesystem doesn't support it and no
 761                  * emulation is being done by the libc (like on AIX with JFS1). In that
 762                  * case we do our own emulation. fallocate implementations can
 763                  * return ENOTSUP or EINVAL in cases like that. */
 764                 ret = SMB_VFS_FALLOCATE(fsp, 0, offset, num_to_write);
 765                 if (ret == -1 && errno == ENOSPC) {
 766                         goto out;
 767                 }
 768                 if (ret == 0) {
 769                         goto out;
 770                 }
 771                 DEBUG(10,("vfs_fill_sparse: SMB_VFS_FALLOCATE failed with "
 772                         "error %d. Falling back to slow manual allocation\n", ret));
 773         }
 774
 775         ret = vfs_slow_fallocate(fsp, offset, num_to_write);
 776
 777  out:
 778
 779         contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_FILL_SPARSE);
 780         return ret;
 781 }
 782
 783 /*******************************************************************************
 784  Set a fd into blocking/nonblocking mode through VFS
 785 *******************************************************************************/
 786
 787 int vfs_set_blocking(files_struct *fsp, bool set)
 788 {
 789         int val;
 790 #ifdef O_NONBLOCK
 791 #define FLAG_TO_SET O_NONBLOCK
 792 #else
 793 #ifdef SYSV
 794 #define FLAG_TO_SET O_NDELAY
 795 #else /* BSD */
 796 #define FLAG_TO_SET FNDELAY
 797 #endif
 798 #endif
 799
 800         if (fsp->fsp_flags.is_pathref) {
 801                 return 0;
 802         }
 803
 804         val = SMB_VFS_FCNTL(fsp, F_GETFL, 0);
 805         if (val == -1) {
 806                 return -1;
 807         }
 808
 809         if (set) {
 810                 val &= ~FLAG_TO_SET;
 811         } else {
 812                 val |= FLAG_TO_SET;
 813         }
 814
 815         return SMB_VFS_FCNTL(fsp, F_SETFL, val);
 816 #undef FLAG_TO_SET
 817 }
 818
 819 /****************************************************************************
 820  Transfer some data (n bytes) between two file_struct's.
 821 ****************************************************************************/
 822
 823 static ssize_t vfs_pread_fn(void *file, void *buf, size_t len, off_t offset)
 824 {
 825         struct files_struct *fsp = (struct files_struct *)file;
 826
 827         return SMB_VFS_PREAD(fsp, buf, len, offset);
 828 }
 829
 830 static ssize_t vfs_pwrite_fn(void *file, const void *buf, size_t len, off_t offset)
 831 {
 832         struct files_struct *fsp = (struct files_struct *)file;
 833
 834         return SMB_VFS_PWRITE(fsp, buf, len, offset);
 835 }
 836
 837 off_t vfs_transfer_file(files_struct *in, files_struct *out, off_t n)
 838 {
 839         return transfer_file_internal((void *)in, (void *)out, n,
 840                                       vfs_pread_fn, vfs_pwrite_fn);
 841 }
 842
 843 /*******************************************************************
 844  A vfs_readdir wrapper which just returns the file name.
 845 ********************************************************************/
 846
 847 const char *vfs_readdirname(connection_struct *conn,
 848                             struct files_struct *dirfsp,
 849                             DIR *d,
 850                             char **talloced)
 851 {
 852         struct dirent *ptr= NULL;
 853         const char *dname;
 854         char *translated;
 855         NTSTATUS status;
 856
 857         if (d == NULL) {
 858                 return(NULL);
 859         }
 860
 861         ptr = SMB_VFS_READDIR(conn, dirfsp, d);
 862         if (!ptr)
 863                 return(NULL);
 864
 865         dname = ptr->d_name;
 866
 867         status = SMB_VFS_TRANSLATE_NAME(conn, dname, vfs_translate_to_windows,
 868                                         talloc_tos(), &translated);
 869         if (NT_STATUS_EQUAL(status, NT_STATUS_NONE_MAPPED)) {
 870                 *talloced = NULL;
 871                 return dname;
 872         }
 873         *talloced = translated;
 874         if (!NT_STATUS_IS_OK(status)) {
 875                 return NULL;
 876         }
 877         return translated;
 878 }
 879
 880 /*******************************************************************
 881  A wrapper for vfs_chdir().
 882 ********************************************************************/
 883
 884 int vfs_ChDir(connection_struct *conn, const struct smb_filename *smb_fname)
 885 {
 886         int ret;
 887         struct smb_filename *cwd = NULL;
 888
 889         if (!LastDir) {
 890                 LastDir = SMB_STRDUP("");
 891         }
 892
 893         if (ISDOT(smb_fname->base_name)) {
 894                 /*
 895                  * passing a '.' is a noop,
 896                  * and we only expect this after
 897                  * everything is initialized.
 898                  *
 899                  * So the first vfs_ChDir() on a given
 900                  * connection_struct must not be '.'.
 901                  *
 902                  * Note: conn_new() sets
 903                  * conn->cwd_fsp->fh->fd = -1
 904                  * and vfs_ChDir() leaves with
 905                  * conn->cwd_fsp->fh->fd = AT_FDCWD
 906                  * on success!
 907                  */
 908                 if (fsp_get_pathref_fd(conn->cwd_fsp) != AT_FDCWD) {
 909                         /*
 910                          * This should never happen and
 911                          * we might change this to
 912                          * SMB_ASSERT() in future.
 913                          */
 914                         DBG_ERR("Called with '.' as first operation!\n");
 915                         log_stack_trace();
 916                         errno = EINVAL;
 917                         return -1;
 918                 }
 919                 return 0;
 920         }
 921
 922         if (smb_fname->base_name[0] == '/' &&
 923             strcsequal(LastDir,smb_fname->base_name))
 924         {
 925                 /*
 926                  * conn->cwd_fsp->fsp_name and the kernel
 927                  * are already correct, but conn->cwd_fsp->fh->fd
 928                  * might still be -1 as initialized in conn_new().
 929                  *
 930                  * This can happen when a client made a 2nd
 931                  * tree connect to a share with the same underlying
 932                  * path (may or may not the same share).
 933                  */
 934                 fsp_set_fd(conn->cwd_fsp, AT_FDCWD);
 935                 return 0;
 936         }
 937
 938         DEBUG(4,("vfs_ChDir to %s\n", smb_fname->base_name));
 939
 940         ret = SMB_VFS_CHDIR(conn, smb_fname);
 941         if (ret != 0) {
 942                 return -1;
 943         }
 944
 945         /*
 946          * Always replace conn->cwd_fsp. We
 947          * don't know if it's been modified by
 948          * VFS modules in the stack.
 949          */
 950         fsp_set_fd(conn->cwd_fsp, AT_FDCWD);
 951
 952         /* conn cache. */
 953         cwd = vfs_GetWd(conn, conn);
 954         if (cwd == NULL) {
 955                 /*
 956                  * vfs_GetWd() failed.
 957                  * We must be able to read cwd.
 958                  * Return to original directory
 959                  * and return -1.
 960                  */
 961                 int saved_errno = errno;
 962
 963                 if (conn->cwd_fsp->fsp_name == NULL) {
 964                         /*
 965                          * Failed on the very first chdir()+getwd()
 966                          * for this connection. We can't
 967                          * continue.
 968                          */
 969                         smb_panic("conn->cwd getwd failed\n");
 970                         /* NOTREACHED */
 971                         return -1;
 972                 }
 973
 974                 /* Return to the previous $cwd. */
 975                 ret = SMB_VFS_CHDIR(conn, conn->cwd_fsp->fsp_name);
 976                 if (ret != 0) {
 977                         smb_panic("conn->cwd getwd failed\n");
 978                         /* NOTREACHED */
 979                         return -1;
 980                 }
 981                 errno = saved_errno;
 982                 /* And fail the chdir(). */
 983                 return -1;
 984         }
 985
 986         /* vfs_GetWd() succeeded. */
 987         /* Replace global cache. */
 988         SAFE_FREE(LastDir);
 989         LastDir = SMB_STRDUP(smb_fname->base_name);
 990
 991         /*
 992          * (Indirect) Callers of vfs_ChDir() may still hold references to the
 993          * old conn->cwd_fsp->fsp_name. Move it to talloc_tos(), that way
 994          * callers can use it for the lifetime of the SMB request.
 995          */
 996         talloc_move(talloc_tos(), &conn->cwd_fsp->fsp_name);
 997
 998         conn->cwd_fsp->fsp_name = talloc_move(conn->cwd_fsp, &cwd);
 999
1000         DBG_INFO("vfs_ChDir got %s\n", fsp_str_dbg(conn->cwd_fsp));
1001
1002         return ret;
1003 }
1004
1005 /*******************************************************************
1006  Return the absolute current directory path - given a UNIX pathname.
1007  Note that this path is returned in DOS format, not UNIX
1008  format. Note this can be called with conn == NULL.
1009 ********************************************************************/
1010
1011 struct smb_filename *vfs_GetWd(TALLOC_CTX *ctx, connection_struct *conn)
1012 {
1013         struct smb_filename *current_dir_fname = NULL;
1014         struct file_id key;
1015         struct smb_filename *smb_fname_dot = NULL;
1016         struct smb_filename *smb_fname_full = NULL;
1017         struct smb_filename *result = NULL;
1018
1019         if (!lp_getwd_cache()) {
1020                 goto nocache;
1021         }
1022
1023         smb_fname_dot = synthetic_smb_fname(ctx,
1024                                             ".",
1025                                             NULL,
1026                                             NULL,
1027                                             0,
1028                                             0);
1029         if (smb_fname_dot == NULL) {
1030                 errno = ENOMEM;
1031                 goto out;
1032         }
1033
1034         if (SMB_VFS_STAT(conn, smb_fname_dot) == -1) {
1035                 /*
1036                  * Known to fail for root: the directory may be NFS-mounted
1037                  * and exported with root_squash (so has no root access).
1038                  */
1039                 DEBUG(1,("vfs_GetWd: couldn't stat \".\" error %s "
1040                          "(NFS problem ?)\n", strerror(errno) ));
1041                 goto nocache;
1042         }
1043
1044         key = vfs_file_id_from_sbuf(conn, &smb_fname_dot->st);
1045
1046         smb_fname_full = (struct smb_filename *)memcache_lookup_talloc(
1047                                         smbd_memcache(),
1048                                         GETWD_CACHE,
1049                                         data_blob_const(&key, sizeof(key)));
1050
1051         if (smb_fname_full == NULL) {
1052                 goto nocache;
1053         }
1054
1055         if ((SMB_VFS_STAT(conn, smb_fname_full) == 0) &&
1056             (smb_fname_dot->st.st_ex_dev == smb_fname_full->st.st_ex_dev) &&
1057             (smb_fname_dot->st.st_ex_ino == smb_fname_full->st.st_ex_ino) &&
1058             (S_ISDIR(smb_fname_dot->st.st_ex_mode))) {
1059                 /*
1060                  * Ok, we're done
1061                  * Note: smb_fname_full is owned by smbd_memcache()
1062                  * so we must make a copy to return.
1063                  */
1064                 result = cp_smb_filename(ctx, smb_fname_full);
1065                 if (result == NULL) {
1066                         errno = ENOMEM;
1067                 }
1068                 goto out;
1069         }
1070
1071  nocache:
1072
1073         /*
1074          * We don't have the information to hand so rely on traditional
1075          * methods. The very slow getcwd, which spawns a process on some
1076          * systems, or the not quite so bad getwd.
1077          */
1078
1079         current_dir_fname = SMB_VFS_GETWD(conn, ctx);
1080         if (current_dir_fname == NULL) {
1081                 DEBUG(0, ("vfs_GetWd: SMB_VFS_GETWD call failed: %s\n",
1082                           strerror(errno)));
1083                 goto out;
1084         }
1085
1086         if (lp_getwd_cache() && VALID_STAT(smb_fname_dot->st)) {
1087                 key = vfs_file_id_from_sbuf(conn, &smb_fname_dot->st);
1088
1089                 /*
1090                  * smbd_memcache() will own current_dir_fname after the
1091                  * memcache_add_talloc call, so we must make
1092                  * a copy on ctx to return.
1093                  */
1094                 result = cp_smb_filename(ctx, current_dir_fname);
1095                 if (result == NULL) {
1096                         errno = ENOMEM;
1097                 }
1098
1099                 /*
1100                  * Ensure the memory going into the cache
1101                  * doesn't have a destructor so it can be
1102                  * cleanly freed.
1103                  */
1104                 talloc_set_destructor(current_dir_fname, NULL);
1105
1106                 memcache_add_talloc(smbd_memcache(),
1107                                 GETWD_CACHE,
1108                                 data_blob_const(&key, sizeof(key)),
1109                                 &current_dir_fname);
1110                 /* current_dir_fname is now == NULL here. */
1111         } else {
1112                 /* current_dir_fname is already allocated on ctx. */
1113                 result = current_dir_fname;
1114         }
1115
1116  out:
1117         TALLOC_FREE(smb_fname_dot);
1118         /*
1119          * Don't free current_dir_fname here. It's either been moved
1120          * to the memcache or is being returned in result.
1121          */
1122         return result;
1123 }
1124
1125 /*
1126  * Ensure LSTAT is called for POSIX paths.
1127  */
1128 int vfs_stat(struct connection_struct *conn,
1129              struct smb_filename *smb_fname)
1130 {
1131         if (smb_fname->flags & SMB_FILENAME_POSIX_PATH) {
1132                 return SMB_VFS_LSTAT(conn, smb_fname);
1133         }
1134         return SMB_VFS_STAT(conn, smb_fname);
1135 }
1136
1137 /**
1138  * XXX: This is temporary and there should be no callers of this once
1139  * smb_filename is plumbed through all path based operations.
1140  *
1141  * Called when we know stream name parsing has already been done.
1142  */
1143 int vfs_stat_smb_basename(struct connection_struct *conn,
1144                         const struct smb_filename *smb_fname_in,
1145                         SMB_STRUCT_STAT *psbuf)
1146 {
1147         struct smb_filename smb_fname = {
1148                 .base_name = discard_const_p(char, smb_fname_in->base_name),
1149                 .flags = smb_fname_in->flags,
1150                 .twrp = smb_fname_in->twrp,
1151         };
1152         int ret;
1153
1154         ret = vfs_stat(conn, &smb_fname);
1155         if (ret != -1) {
1156                 *psbuf = smb_fname.st;
1157         }
1158         return ret;
1159 }
1160
1161 /**
1162  * Ensure LSTAT is called for POSIX paths.
1163  */
1164
1165 NTSTATUS vfs_stat_fsp(files_struct *fsp)
1166 {
1167         int ret;
1168         struct stat_ex saved_stat = fsp->fsp_name->st;
1169
1170         if (fsp->fake_file_handle != NULL) {
1171                 return NT_STATUS_OK;
1172         }
1173
1174         if (fsp_get_pathref_fd(fsp) == -1) {
1175                 if (fsp->posix_flags & FSP_POSIX_FLAGS_OPEN) {
1176                         ret = SMB_VFS_LSTAT(fsp->conn, fsp->fsp_name);
1177                 } else {
1178                         ret = SMB_VFS_STAT(fsp->conn, fsp->fsp_name);
1179                 }
1180         } else {
1181                 ret = SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st);
1182         }
1183         if (ret == -1) {
1184                 return map_nt_error_from_unix(errno);
1185         }
1186         update_stat_ex_from_saved_stat(&fsp->fsp_name->st, &saved_stat);
1187         fsp->fsp_flags.is_directory = S_ISDIR(fsp->fsp_name->st.st_ex_mode);
1188         return NT_STATUS_OK;
1189 }
1190
1191 void init_smb_file_time(struct smb_file_time *ft)
1192 {
1193         *ft = (struct smb_file_time) {
1194                 .atime = make_omit_timespec(),
1195                 .ctime = make_omit_timespec(),
1196                 .mtime = make_omit_timespec(),
1197                 .create_time = make_omit_timespec()
1198         };
1199 }
1200
1201 /**
1202  * Initialize num_streams and streams, then call VFS op streaminfo
1203  */
1204
1205 NTSTATUS vfs_fstreaminfo(struct files_struct *fsp,
1206                         TALLOC_CTX *mem_ctx,
1207                         unsigned int *num_streams,
1208                         struct stream_struct **streams)
1209 {
1210         *num_streams = 0;
1211         *streams = NULL;
1212
1213         if (fsp == NULL) {
1214                 /*
1215                  * Callers may pass fsp == NULL when passing smb_fname->fsp of a
1216                  * symlink. This is ok, handle it here, by just return no
1217                  * streams on a symlink.
1218                  */
1219                 return NT_STATUS_OK;
1220         }
1221
1222         if (fsp_get_pathref_fd(fsp) == -1) {
1223                 /*
1224                  * No streams on non-real files/directories.
1225                  */
1226                 return NT_STATUS_OK;
1227         }
1228
1229         return SMB_VFS_FSTREAMINFO(fsp,
1230                         mem_ctx,
1231                         num_streams,
1232                         streams);
1233 }
1234
1235 int vfs_fake_fd(void)
1236 {
1237         int pipe_fds[2];
1238         int ret;
1239
1240         /*
1241          * Return a valid fd, but ensure any attempt to use
1242          * it returns an error (EPIPE).
1243          */
1244         ret = pipe(pipe_fds);
1245         if (ret != 0) {
1246                 return -1;
1247         }
1248
1249         close(pipe_fds[1]);
1250         return pipe_fds[0];
1251 }
1252
1253 /*
1254  * This is just a helper to make
1255  * users of vfs_fake_fd() more symmetric
1256  */
1257 int vfs_fake_fd_close(int fd)
1258 {
1259         return close(fd);
1260 }
1261
1262 /*
1263   generate a file_id from a stat structure
1264  */
1265 struct file_id vfs_file_id_from_sbuf(connection_struct *conn, const SMB_STRUCT_STAT *sbuf)
1266 {
1267         return SMB_VFS_FILE_ID_CREATE(conn, sbuf);
1268 }
1269
1270 NTSTATUS vfs_at_fspcwd(TALLOC_CTX *mem_ctx,
1271                        struct connection_struct *conn,
1272                        struct files_struct **_fsp)
1273 {
1274         struct files_struct *fsp = NULL;
1275
1276         fsp = talloc_zero(mem_ctx, struct files_struct);
1277         if (fsp == NULL) {
1278                 return NT_STATUS_NO_MEMORY;
1279         }
1280
1281         fsp->fsp_name = synthetic_smb_fname(fsp, ".", NULL, NULL, 0, 0);
1282         if (fsp->fsp_name == NULL) {
1283                 TALLOC_FREE(fsp);
1284                 return NT_STATUS_NO_MEMORY;
1285         }
1286
1287         fsp->fh = fd_handle_create(fsp);
1288         if (fsp->fh == NULL) {
1289                 TALLOC_FREE(fsp);
1290                 return NT_STATUS_NO_MEMORY;
1291         }
1292
1293         fsp_set_fd(fsp, AT_FDCWD);
1294         fsp->fnum = FNUM_FIELD_INVALID;
1295         fsp->conn = conn;
1296
1297         *_fsp = fsp;
1298         return NT_STATUS_OK;
1299 }
1300
1301 static struct smb_vfs_deny_state *smb_vfs_deny_global;
1302
1303 void smb_vfs_assert_allowed(void)
1304 {
1305         if (unlikely(smb_vfs_deny_global != NULL)) {
1306                 DBG_ERR("Called with VFS denied by %s\n",
1307                         smb_vfs_deny_global->location);
1308                 smb_panic("Called with VFS denied!");
1309         }
1310 }
1311
1312 void _smb_vfs_deny_push(struct smb_vfs_deny_state *state, const char *location)
1313 {
1314         SMB_ASSERT(smb_vfs_deny_global != state);
1315
1316         *state = (struct smb_vfs_deny_state) {
1317                 .parent = smb_vfs_deny_global,
1318                 .location = location,
1319         };
1320
1321         smb_vfs_deny_global = state;
1322 }
1323
1324 void _smb_vfs_deny_pop(struct smb_vfs_deny_state *state, const char *location)
1325 {
1326         SMB_ASSERT(smb_vfs_deny_global == state);
1327
1328         smb_vfs_deny_global = state->parent;
1329
1330         *state = (struct smb_vfs_deny_state) { .parent = NULL, };
1331 }
1332
1333 #define VFS_FIND(__fn__) do { \
1334         if (unlikely(smb_vfs_deny_global != NULL)) { \
1335                 DBG_ERR("Called with VFS denied by %s\n", \
1336                         smb_vfs_deny_global->location); \
1337                 smb_panic("Called with VFS denied!"); \
1338         } \
1339         while (handle->fns->__fn__##_fn==NULL) { \
1340                 handle = handle->next; \
1341         } \
1342 } while(0)
1343
1344 int smb_vfs_call_connect(struct vfs_handle_struct *handle,
1345                          const char *service, const char *user)
1346 {
1347         VFS_FIND(connect);
1348         return handle->fns->connect_fn(handle, service, user);
1349 }
1350
1351 void smb_vfs_call_disconnect(struct vfs_handle_struct *handle)
1352 {
1353         VFS_FIND(disconnect);
1354         handle->fns->disconnect_fn(handle);
1355 }
1356
1357 uint64_t smb_vfs_call_disk_free(struct vfs_handle_struct *handle,
1358                                 const struct smb_filename *smb_fname,
1359                                 uint64_t *bsize,
1360                                 uint64_t *dfree,
1361                                 uint64_t *dsize)
1362 {
1363         VFS_FIND(disk_free);
1364         return handle->fns->disk_free_fn(handle, smb_fname,
1365                         bsize, dfree, dsize);
1366 }
1367
1368 int smb_vfs_call_get_quota(struct vfs_handle_struct *handle,
1369                                 const struct smb_filename *smb_fname,
1370                                 enum SMB_QUOTA_TYPE qtype,
1371                                 unid_t id,
1372                                 SMB_DISK_QUOTA *qt)
1373 {
1374         VFS_FIND(get_quota);
1375         return handle->fns->get_quota_fn(handle, smb_fname, qtype, id, qt);
1376 }
1377
1378 int smb_vfs_call_set_quota(struct vfs_handle_struct *handle,
1379                            enum SMB_QUOTA_TYPE qtype, unid_t id,
1380                            SMB_DISK_QUOTA *qt)
1381 {
1382         VFS_FIND(set_quota);
1383         return handle->fns->set_quota_fn(handle, qtype, id, qt);
1384 }
1385
1386 int smb_vfs_call_get_shadow_copy_data(struct vfs_handle_struct *handle,
1387                                       struct files_struct *fsp,
1388                                       struct shadow_copy_data *shadow_copy_data,
1389                                       bool labels)
1390 {
1391         VFS_FIND(get_shadow_copy_data);
1392         return handle->fns->get_shadow_copy_data_fn(handle, fsp,
1393                                                     shadow_copy_data,
1394                                                     labels);
1395 }
1396 int smb_vfs_call_statvfs(struct vfs_handle_struct *handle,
1397                         const struct smb_filename *smb_fname,
1398                         struct vfs_statvfs_struct *statbuf)
1399 {
1400         VFS_FIND(statvfs);
1401         return handle->fns->statvfs_fn(handle, smb_fname, statbuf);
1402 }
1403
1404 uint32_t smb_vfs_call_fs_capabilities(struct vfs_handle_struct *handle,
1405                         enum timestamp_set_resolution *p_ts_res)
1406 {
1407         VFS_FIND(fs_capabilities);
1408         return handle->fns->fs_capabilities_fn(handle, p_ts_res);
1409 }
1410
1411 NTSTATUS smb_vfs_call_get_dfs_referrals(struct vfs_handle_struct *handle,
1412                                         struct dfs_GetDFSReferral *r)
1413 {
1414         VFS_FIND(get_dfs_referrals);
1415         return handle->fns->get_dfs_referrals_fn(handle, r);
1416 }
1417
1418 NTSTATUS smb_vfs_call_create_dfs_pathat(struct vfs_handle_struct *handle,
1419                                 struct files_struct *dirfsp,
1420                                 const struct smb_filename *smb_fname,
1421                                 const struct referral *reflist,
1422                                 size_t referral_count)
1423 {
1424         VFS_FIND(create_dfs_pathat);
1425         return handle->fns->create_dfs_pathat_fn(handle,
1426                                                 dirfsp,
1427                                                 smb_fname,
1428                                                 reflist,
1429                                                 referral_count);
1430 }
1431
1432 NTSTATUS smb_vfs_call_read_dfs_pathat(struct vfs_handle_struct *handle,
1433                                 TALLOC_CTX *mem_ctx,
1434                                 struct files_struct *dirfsp,
1435                                 struct smb_filename *smb_fname,
1436                                 struct referral **ppreflist,
1437                                 size_t *preferral_count)
1438 {
1439         VFS_FIND(read_dfs_pathat);
1440         return handle->fns->read_dfs_pathat_fn(handle,
1441                                                 mem_ctx,
1442                                                 dirfsp,
1443                                                 smb_fname,
1444                                                 ppreflist,
1445                                                 preferral_count);
1446 }
1447
1448 DIR *smb_vfs_call_fdopendir(struct vfs_handle_struct *handle,
1449                                         struct files_struct *fsp,
1450                                         const char *mask,
1451                                         uint32_t attributes)
1452 {
1453         VFS_FIND(fdopendir);
1454         return handle->fns->fdopendir_fn(handle, fsp, mask, attributes);
1455 }
1456
1457 struct dirent *smb_vfs_call_readdir(struct vfs_handle_struct *handle,
1458                                     struct files_struct *dirfsp,
1459                                     DIR *dirp)
1460 {
1461         VFS_FIND(readdir);
1462         return handle->fns->readdir_fn(handle, dirfsp, dirp);
1463 }
1464
1465 void smb_vfs_call_rewind_dir(struct vfs_handle_struct *handle,
1466                              DIR *dirp)
1467 {
1468         VFS_FIND(rewind_dir);
1469         handle->fns->rewind_dir_fn(handle, dirp);
1470 }
1471
1472 int smb_vfs_call_mkdirat(struct vfs_handle_struct *handle,
1473                         struct files_struct *dirfsp,
1474                         const struct smb_filename *smb_fname,
1475                         mode_t mode)
1476 {
1477         VFS_FIND(mkdirat);
1478         return handle->fns->mkdirat_fn(handle,
1479                         dirfsp,
1480                         smb_fname,
1481                         mode);
1482 }
1483
1484 int smb_vfs_call_closedir(struct vfs_handle_struct *handle,
1485                           DIR *dir)
1486 {
1487         VFS_FIND(closedir);
1488         return handle->fns->closedir_fn(handle, dir);
1489 }
1490
1491 int smb_vfs_call_openat(struct vfs_handle_struct *handle,
1492                         const struct files_struct *dirfsp,
1493                         const struct smb_filename *smb_fname,
1494                         struct files_struct *fsp,
1495                         const struct vfs_open_how *how)
1496 {
1497         VFS_FIND(openat);
1498         return handle->fns->openat_fn(handle,
1499                                       dirfsp,
1500                                       smb_fname,
1501                                       fsp,
1502                                       how);
1503 }
1504
1505 NTSTATUS smb_vfs_call_create_file(struct vfs_handle_struct *handle,
1506                                   struct smb_request *req,
1507                                   struct files_struct *dirfsp,
1508                                   struct smb_filename *smb_fname,
1509                                   uint32_t access_mask,
1510                                   uint32_t share_access,
1511                                   uint32_t create_disposition,
1512                                   uint32_t create_options,
1513                                   uint32_t file_attributes,
1514                                   uint32_t oplock_request,
1515                                   const struct smb2_lease *lease,
1516                                   uint64_t allocation_size,
1517                                   uint32_t private_flags,
1518                                   struct security_descriptor *sd,
1519                                   struct ea_list *ea_list,
1520                                   files_struct **result,
1521                                   int *pinfo,
1522                                   const struct smb2_create_blobs *in_context_blobs,
1523                                   struct smb2_create_blobs *out_context_blobs)
1524 {
1525         VFS_FIND(create_file);
1526         return handle->fns->create_file_fn(
1527                 handle, req, dirfsp, smb_fname,
1528                 access_mask, share_access, create_disposition, create_options,
1529                 file_attributes, oplock_request, lease, allocation_size,
1530                 private_flags, sd, ea_list,
1531                 result, pinfo, in_context_blobs, out_context_blobs);
1532 }
1533
1534 int smb_vfs_call_close(struct vfs_handle_struct *handle,
1535                        struct files_struct *fsp)
1536 {
1537         VFS_FIND(close);
1538         return handle->fns->close_fn(handle, fsp);
1539 }
1540
1541 ssize_t smb_vfs_call_pread(struct vfs_handle_struct *handle,
1542                            struct files_struct *fsp, void *data, size_t n,
1543                            off_t offset)
1544 {
1545         VFS_FIND(pread);
1546         return handle->fns->pread_fn(handle, fsp, data, n, offset);
1547 }
1548
1549 struct smb_vfs_call_pread_state {
1550         ssize_t (*recv_fn)(struct tevent_req *req, struct vfs_aio_state *vfs_aio_state);
1551         ssize_t retval;
1552         struct vfs_aio_state vfs_aio_state;
1553 };
1554
1555 static void smb_vfs_call_pread_done(struct tevent_req *subreq);
1556
1557 struct tevent_req *smb_vfs_call_pread_send(struct vfs_handle_struct *handle,
1558                                            TALLOC_CTX *mem_ctx,
1559                                            struct tevent_context *ev,
1560                                            struct files_struct *fsp,
1561                                            void *data,
1562                                            size_t n, off_t offset)
1563 {
1564         struct tevent_req *req, *subreq;
1565         struct smb_vfs_call_pread_state *state;
1566
1567         req = tevent_req_create(mem_ctx, &state,
1568                                 struct smb_vfs_call_pread_state);
1569         if (req == NULL) {
1570                 return NULL;
1571         }
1572         VFS_FIND(pread_send);
1573         state->recv_fn = handle->fns->pread_recv_fn;
1574
1575         subreq = handle->fns->pread_send_fn(handle, state, ev, fsp, data, n,
1576                                             offset);
1577         if (tevent_req_nomem(subreq, req)) {
1578                 return tevent_req_post(req, ev);
1579         }
1580         tevent_req_set_callback(subreq, smb_vfs_call_pread_done, req);
1581         return req;
1582 }
1583
1584 static void smb_vfs_call_pread_done(struct tevent_req *subreq)
1585 {
1586         struct tevent_req *req = tevent_req_callback_data(
1587                 subreq, struct tevent_req);
1588         struct smb_vfs_call_pread_state *state = tevent_req_data(
1589                 req, struct smb_vfs_call_pread_state);
1590
1591         state->retval = state->recv_fn(subreq, &state->vfs_aio_state);
1592         TALLOC_FREE(subreq);
1593         if (state->retval == -1) {
1594                 tevent_req_error(req, state->vfs_aio_state.error);
1595                 return;
1596         }
1597         tevent_req_done(req);
1598 }
1599
1600 ssize_t SMB_VFS_PREAD_RECV(struct tevent_req *req,
1601                            struct vfs_aio_state *vfs_aio_state)
1602 {
1603         struct smb_vfs_call_pread_state *state = tevent_req_data(
1604                 req, struct smb_vfs_call_pread_state);
1605         ssize_t retval;
1606
1607         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1608                 tevent_req_received(req);
1609                 return -1;
1610         }
1611         *vfs_aio_state = state->vfs_aio_state;
1612         retval = state->retval;
1613         tevent_req_received(req);
1614         return retval;
1615 }
1616
1617 ssize_t smb_vfs_call_pwrite(struct vfs_handle_struct *handle,
1618                             struct files_struct *fsp, const void *data,
1619                             size_t n, off_t offset)
1620 {
1621         VFS_FIND(pwrite);
1622         return handle->fns->pwrite_fn(handle, fsp, data, n, offset);
1623 }
1624
1625 struct smb_vfs_call_pwrite_state {
1626         ssize_t (*recv_fn)(struct tevent_req *req, struct vfs_aio_state *vfs_aio_state);
1627         ssize_t retval;
1628         struct vfs_aio_state vfs_aio_state;
1629 };
1630
1631 static void smb_vfs_call_pwrite_done(struct tevent_req *subreq);
1632
1633 struct tevent_req *smb_vfs_call_pwrite_send(struct vfs_handle_struct *handle,
1634                                             TALLOC_CTX *mem_ctx,
1635                                             struct tevent_context *ev,
1636                                             struct files_struct *fsp,
1637                                             const void *data,
1638                                             size_t n, off_t offset)
1639 {
1640         struct tevent_req *req, *subreq;
1641         struct smb_vfs_call_pwrite_state *state;
1642
1643         req = tevent_req_create(mem_ctx, &state,
1644                                 struct smb_vfs_call_pwrite_state);
1645         if (req == NULL) {
1646                 return NULL;
1647         }
1648         VFS_FIND(pwrite_send);
1649         state->recv_fn = handle->fns->pwrite_recv_fn;
1650
1651         subreq = handle->fns->pwrite_send_fn(handle, state, ev, fsp, data, n,
1652                                              offset);
1653         if (tevent_req_nomem(subreq, req)) {
1654                 return tevent_req_post(req, ev);
1655         }
1656         tevent_req_set_callback(subreq, smb_vfs_call_pwrite_done, req);
1657         return req;
1658 }
1659
1660 static void smb_vfs_call_pwrite_done(struct tevent_req *subreq)
1661 {
1662         struct tevent_req *req = tevent_req_callback_data(
1663                 subreq, struct tevent_req);
1664         struct smb_vfs_call_pwrite_state *state = tevent_req_data(
1665                 req, struct smb_vfs_call_pwrite_state);
1666
1667         state->retval = state->recv_fn(subreq, &state->vfs_aio_state);
1668         TALLOC_FREE(subreq);
1669         if (state->retval == -1) {
1670                 tevent_req_error(req, state->vfs_aio_state.error);
1671                 return;
1672         }
1673         tevent_req_done(req);
1674 }
1675
1676 ssize_t SMB_VFS_PWRITE_RECV(struct tevent_req *req,
1677                             struct vfs_aio_state *vfs_aio_state)
1678 {
1679         struct smb_vfs_call_pwrite_state *state = tevent_req_data(
1680                 req, struct smb_vfs_call_pwrite_state);
1681         ssize_t retval;
1682
1683         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1684                 tevent_req_received(req);
1685                 return -1;
1686         }
1687         *vfs_aio_state = state->vfs_aio_state;
1688         retval = state->retval;
1689         tevent_req_received(req);
1690         return retval;
1691 }
1692
1693 off_t smb_vfs_call_lseek(struct vfs_handle_struct *handle,
1694                              struct files_struct *fsp, off_t offset,
1695                              int whence)
1696 {
1697         VFS_FIND(lseek);
1698         return handle->fns->lseek_fn(handle, fsp, offset, whence);
1699 }
1700
1701 ssize_t smb_vfs_call_sendfile(struct vfs_handle_struct *handle, int tofd,
1702                               files_struct *fromfsp, const DATA_BLOB *header,
1703                               off_t offset, size_t count)
1704 {
1705         VFS_FIND(sendfile);
1706         return handle->fns->sendfile_fn(handle, tofd, fromfsp, header, offset,
1707                                         count);
1708 }
1709
1710 ssize_t smb_vfs_call_recvfile(struct vfs_handle_struct *handle, int fromfd,
1711                               files_struct *tofsp, off_t offset,
1712                               size_t count)
1713 {
1714         VFS_FIND(recvfile);
1715         return handle->fns->recvfile_fn(handle, fromfd, tofsp, offset, count);
1716 }
1717
1718 int smb_vfs_call_renameat(struct vfs_handle_struct *handle,
1719                         files_struct *srcfsp,
1720                         const struct smb_filename *smb_fname_src,
1721                         files_struct *dstfsp,
1722                         const struct smb_filename *smb_fname_dst)
1723 {
1724         VFS_FIND(renameat);
1725         return handle->fns->renameat_fn(handle,
1726                                 srcfsp,
1727                                 smb_fname_src,
1728                                 dstfsp,
1729                                 smb_fname_dst);
1730 }
1731
1732 struct smb_vfs_call_fsync_state {
1733         int (*recv_fn)(struct tevent_req *req, struct vfs_aio_state *vfs_aio_state);
1734         int retval;
1735         struct vfs_aio_state vfs_aio_state;
1736 };
1737
1738 static void smb_vfs_call_fsync_done(struct tevent_req *subreq);
1739
1740 struct tevent_req *smb_vfs_call_fsync_send(struct vfs_handle_struct *handle,
1741                                            TALLOC_CTX *mem_ctx,
1742                                            struct tevent_context *ev,
1743                                            struct files_struct *fsp)
1744 {
1745         struct tevent_req *req, *subreq;
1746         struct smb_vfs_call_fsync_state *state;
1747
1748         req = tevent_req_create(mem_ctx, &state,
1749                                 struct smb_vfs_call_fsync_state);
1750         if (req == NULL) {
1751                 return NULL;
1752         }
1753         VFS_FIND(fsync_send);
1754         state->recv_fn = handle->fns->fsync_recv_fn;
1755
1756         subreq = handle->fns->fsync_send_fn(handle, state, ev, fsp);
1757         if (tevent_req_nomem(subreq, req)) {
1758                 return tevent_req_post(req, ev);
1759         }
1760         tevent_req_set_callback(subreq, smb_vfs_call_fsync_done, req);
1761         return req;
1762 }
1763
1764 static void smb_vfs_call_fsync_done(struct tevent_req *subreq)
1765 {
1766         struct tevent_req *req = tevent_req_callback_data(
1767                 subreq, struct tevent_req);
1768         struct smb_vfs_call_fsync_state *state = tevent_req_data(
1769                 req, struct smb_vfs_call_fsync_state);
1770
1771         state->retval = state->recv_fn(subreq, &state->vfs_aio_state);
1772         TALLOC_FREE(subreq);
1773         if (state->retval == -1) {
1774                 tevent_req_error(req, state->vfs_aio_state.error);
1775                 return;
1776         }
1777         tevent_req_done(req);
1778 }
1779
1780 int SMB_VFS_FSYNC_RECV(struct tevent_req *req, struct vfs_aio_state *vfs_aio_state)
1781 {
1782         struct smb_vfs_call_fsync_state *state = tevent_req_data(
1783                 req, struct smb_vfs_call_fsync_state);
1784         ssize_t retval;
1785
1786         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1787                 tevent_req_received(req);
1788                 return -1;
1789         }
1790         *vfs_aio_state = state->vfs_aio_state;
1791         retval = state->retval;
1792         tevent_req_received(req);
1793         return retval;
1794 }
1795
1796 /*
1797  * Synchronous version of fsync, built from backend
1798  * async VFS primitives. Uses a temporary sub-event
1799  * context (NOT NESTED).
1800  */
1801
1802 int smb_vfs_fsync_sync(files_struct *fsp)
1803 {
1804         TALLOC_CTX *frame = talloc_stackframe();
1805         struct tevent_req *req = NULL;
1806         struct vfs_aio_state aio_state = { 0 };
1807         int ret = -1;
1808         bool ok;
1809         struct tevent_context *ev = samba_tevent_context_init(frame);
1810
1811         if (ev == NULL) {
1812                 goto out;
1813         }
1814
1815         req = SMB_VFS_FSYNC_SEND(talloc_tos(), ev, fsp);
1816         if (req == NULL) {
1817                 goto out;
1818         }
1819
1820         ok = tevent_req_poll(req, ev);
1821         if (!ok) {
1822                 goto out;
1823         }
1824
1825         ret = SMB_VFS_FSYNC_RECV(req, &aio_state);
1826
1827   out:
1828
1829         TALLOC_FREE(frame);
1830         if (aio_state.error != 0) {
1831                 errno = aio_state.error;
1832         }
1833         return ret;
1834 }
1835
1836 int smb_vfs_call_stat(struct vfs_handle_struct *handle,
1837                       struct smb_filename *smb_fname)
1838 {
1839         VFS_FIND(stat);
1840         return handle->fns->stat_fn(handle, smb_fname);
1841 }
1842
1843 int smb_vfs_call_fstat(struct vfs_handle_struct *handle,
1844                        struct files_struct *fsp, SMB_STRUCT_STAT *sbuf)
1845 {
1846         VFS_FIND(fstat);
1847         return handle->fns->fstat_fn(handle, fsp, sbuf);
1848 }
1849
1850 int smb_vfs_call_lstat(struct vfs_handle_struct *handle,
1851                        struct smb_filename *smb_filename)
1852 {
1853         VFS_FIND(lstat);
1854         return handle->fns->lstat_fn(handle, smb_filename);
1855 }
1856
1857 int smb_vfs_call_fstatat(
1858         struct vfs_handle_struct *handle,
1859         const struct files_struct *dirfsp,
1860         const struct smb_filename *smb_fname,
1861         SMB_STRUCT_STAT *sbuf,
1862         int flags)
1863 {
1864         VFS_FIND(fstatat);
1865         return handle->fns->fstatat_fn(handle, dirfsp, smb_fname, sbuf, flags);
1866 }
1867
1868 uint64_t smb_vfs_call_get_alloc_size(struct vfs_handle_struct *handle,
1869                                      struct files_struct *fsp,
1870                                      const SMB_STRUCT_STAT *sbuf)
1871 {
1872         VFS_FIND(get_alloc_size);
1873         return handle->fns->get_alloc_size_fn(handle, fsp, sbuf);
1874 }
1875
1876 int smb_vfs_call_unlinkat(struct vfs_handle_struct *handle,
1877                         struct files_struct *dirfsp,
1878                         const struct smb_filename *smb_fname,
1879                         int flags)
1880 {
1881         VFS_FIND(unlinkat);
1882         return handle->fns->unlinkat_fn(handle,
1883                         dirfsp,
1884                         smb_fname,
1885                         flags);
1886 }
1887
1888 int smb_vfs_call_fchmod(struct vfs_handle_struct *handle,
1889                         struct files_struct *fsp, mode_t mode)
1890 {
1891         VFS_FIND(fchmod);
1892         return handle->fns->fchmod_fn(handle, fsp, mode);
1893 }
1894
1895 int smb_vfs_call_fchown(struct vfs_handle_struct *handle,
1896                         struct files_struct *fsp, uid_t uid, gid_t gid)
1897 {
1898         VFS_FIND(fchown);
1899         return handle->fns->fchown_fn(handle, fsp, uid, gid);
1900 }
1901
1902 int smb_vfs_call_lchown(struct vfs_handle_struct *handle,
1903                         const struct smb_filename *smb_fname,
1904                         uid_t uid,
1905                         gid_t gid)
1906 {
1907         VFS_FIND(lchown);
1908         return handle->fns->lchown_fn(handle, smb_fname, uid, gid);
1909 }
1910
1911 int smb_vfs_call_chdir(struct vfs_handle_struct *handle,
1912                         const struct smb_filename *smb_fname)
1913 {
1914         VFS_FIND(chdir);
1915         return handle->fns->chdir_fn(handle, smb_fname);
1916 }
1917
1918 struct smb_filename *smb_vfs_call_getwd(struct vfs_handle_struct *handle,
1919                                 TALLOC_CTX *ctx)
1920 {
1921         VFS_FIND(getwd);
1922         return handle->fns->getwd_fn(handle, ctx);
1923 }
1924
1925 int smb_vfs_call_fntimes(struct vfs_handle_struct *handle,
1926                          struct files_struct *fsp,
1927                          struct smb_file_time *ft)
1928 {
1929         VFS_FIND(fntimes);
1930         return handle->fns->fntimes_fn(handle, fsp, ft);
1931 }
1932
1933 int smb_vfs_call_ftruncate(struct vfs_handle_struct *handle,
1934                            struct files_struct *fsp, off_t offset)
1935 {
1936         VFS_FIND(ftruncate);
1937         return handle->fns->ftruncate_fn(handle, fsp, offset);
1938 }
1939
1940 int smb_vfs_call_fallocate(struct vfs_handle_struct *handle,
1941                            struct files_struct *fsp,
1942                            uint32_t mode,
1943                            off_t offset,
1944                            off_t len)
1945 {
1946         VFS_FIND(fallocate);
1947         return handle->fns->fallocate_fn(handle, fsp, mode, offset, len);
1948 }
1949
1950 int smb_vfs_call_filesystem_sharemode(struct vfs_handle_struct *handle,
1951                                       struct files_struct *fsp,
1952                                       uint32_t share_mode,
1953                                       uint32_t access_mask)
1954 {
1955         VFS_FIND(filesystem_sharemode);
1956         return handle->fns->filesystem_sharemode_fn(handle,
1957                                                     fsp,
1958                                                     share_mode,
1959                                                     access_mask);
1960 }
1961
1962 int smb_vfs_call_fcntl(struct vfs_handle_struct *handle,
1963                        struct files_struct *fsp, int cmd, ...)
1964 {
1965         int result;
1966         va_list cmd_arg;
1967
1968         VFS_FIND(fcntl);
1969
1970         va_start(cmd_arg, cmd);
1971         result = handle->fns->fcntl_fn(handle, fsp, cmd, cmd_arg);
1972         va_end(cmd_arg);
1973
1974         return result;
1975 }
1976
1977 int smb_vfs_call_linux_setlease(struct vfs_handle_struct *handle,
1978                                 struct files_struct *fsp, int leasetype)
1979 {
1980         VFS_FIND(linux_setlease);
1981         return handle->fns->linux_setlease_fn(handle, fsp, leasetype);
1982 }
1983
1984 int smb_vfs_call_symlinkat(struct vfs_handle_struct *handle,
1985                         const struct smb_filename *link_target,
1986                         struct files_struct *dirfsp,
1987                         const struct smb_filename *new_smb_fname)
1988 {
1989         VFS_FIND(symlinkat);
1990         return handle->fns->symlinkat_fn(handle,
1991                                 link_target,
1992                                 dirfsp,
1993                                 new_smb_fname);
1994 }
1995
1996 int smb_vfs_call_readlinkat(struct vfs_handle_struct *handle,
1997                         const struct files_struct *dirfsp,
1998                         const struct smb_filename *smb_fname,
1999                         char *buf,
2000                         size_t bufsiz)
2001 {
2002         VFS_FIND(readlinkat);
2003         return handle->fns->readlinkat_fn(handle,
2004                                 dirfsp,
2005                                 smb_fname,
2006                                 buf,
2007                                 bufsiz);
2008 }
2009
2010 int smb_vfs_call_linkat(struct vfs_handle_struct *handle,
2011                         struct files_struct *srcfsp,
2012                         const struct smb_filename *old_smb_fname,
2013                         struct files_struct *dstfsp,
2014                         const struct smb_filename *new_smb_fname,
2015                         int flags)
2016 {
2017         VFS_FIND(linkat);
2018         return handle->fns->linkat_fn(handle,
2019                                 srcfsp,
2020                                 old_smb_fname,
2021                                 dstfsp,
2022                                 new_smb_fname,
2023                                 flags);
2024 }
2025
2026 int smb_vfs_call_mknodat(struct vfs_handle_struct *handle,
2027                         struct files_struct *dirfsp,
2028                         const struct smb_filename *smb_fname,
2029                         mode_t mode,
2030                         SMB_DEV_T dev)
2031 {
2032         VFS_FIND(mknodat);
2033         return handle->fns->mknodat_fn(handle,
2034                                 dirfsp,
2035                                 smb_fname,
2036                                 mode,
2037                                 dev);
2038 }
2039
2040 struct smb_filename *smb_vfs_call_realpath(struct vfs_handle_struct *handle,
2041                         TALLOC_CTX *ctx,
2042                         const struct smb_filename *smb_fname)
2043 {
2044         VFS_FIND(realpath);
2045         return handle->fns->realpath_fn(handle, ctx, smb_fname);
2046 }
2047
2048 int smb_vfs_call_fchflags(struct vfs_handle_struct *handle,
2049                         struct files_struct *fsp,
2050                         unsigned int flags)
2051 {
2052         VFS_FIND(fchflags);
2053         return handle->fns->fchflags_fn(handle, fsp, flags);
2054 }
2055
2056 struct file_id smb_vfs_call_file_id_create(struct vfs_handle_struct *handle,
2057                                            const SMB_STRUCT_STAT *sbuf)
2058 {
2059         VFS_FIND(file_id_create);
2060         return handle->fns->file_id_create_fn(handle, sbuf);
2061 }
2062
2063 uint64_t smb_vfs_call_fs_file_id(struct vfs_handle_struct *handle,
2064                                  const SMB_STRUCT_STAT *sbuf)
2065 {
2066         VFS_FIND(fs_file_id);
2067         return handle->fns->fs_file_id_fn(handle, sbuf);
2068 }
2069
2070 NTSTATUS smb_vfs_call_fstreaminfo(struct vfs_handle_struct *handle,
2071                                  struct files_struct *fsp,
2072                                  TALLOC_CTX *mem_ctx,
2073                                  unsigned int *num_streams,
2074                                  struct stream_struct **streams)
2075 {
2076         VFS_FIND(fstreaminfo);
2077         return handle->fns->fstreaminfo_fn(handle, fsp, mem_ctx,
2078                                           num_streams, streams);
2079 }
2080
2081 NTSTATUS smb_vfs_call_get_real_filename_at(struct vfs_handle_struct *handle,
2082                                            struct files_struct *dirfsp,
2083                                            const char *name,
2084                                            TALLOC_CTX *mem_ctx,
2085                                            char **found_name)
2086 {
2087         VFS_FIND(get_real_filename_at);
2088         return handle->fns->get_real_filename_at_fn(
2089                 handle, dirfsp, name, mem_ctx, found_name);
2090 }
2091
2092 const char *smb_vfs_call_connectpath(struct vfs_handle_struct *handle,
2093                                  const struct files_struct *dirfsp,
2094                                  const struct smb_filename *smb_fname)
2095 {
2096         VFS_FIND(connectpath);
2097         return handle->fns->connectpath_fn(handle, dirfsp, smb_fname);
2098 }
2099
2100 bool smb_vfs_call_strict_lock_check(struct vfs_handle_struct *handle,
2101                                     struct files_struct *fsp,
2102                                     struct lock_struct *plock)
2103 {
2104         VFS_FIND(strict_lock_check);
2105         return handle->fns->strict_lock_check_fn(handle, fsp, plock);
2106 }
2107
2108 NTSTATUS smb_vfs_call_translate_name(struct vfs_handle_struct *handle,
2109                                      const char *name,
2110                                      enum vfs_translate_direction direction,
2111                                      TALLOC_CTX *mem_ctx,
2112                                      char **mapped_name)
2113 {
2114         VFS_FIND(translate_name);
2115         return handle->fns->translate_name_fn(handle, name, direction, mem_ctx,
2116                                               mapped_name);
2117 }
2118
2119 NTSTATUS smb_vfs_call_parent_pathname(struct vfs_handle_struct *handle,
2120                                       TALLOC_CTX *mem_ctx,
2121                                       const struct smb_filename *smb_fname_in,
2122                                       struct smb_filename **parent_dir_out,
2123                                       struct smb_filename **atname_out)
2124 {
2125         VFS_FIND(parent_pathname);
2126         return handle->fns->parent_pathname_fn(handle,
2127                                                mem_ctx,
2128                                                smb_fname_in,
2129                                                parent_dir_out,
2130                                                atname_out);
2131 }
2132
2133 NTSTATUS smb_vfs_call_fsctl(struct vfs_handle_struct *handle,
2134                             struct files_struct *fsp,
2135                             TALLOC_CTX *ctx,
2136                             uint32_t function,
2137                             uint16_t req_flags,
2138                             const uint8_t *in_data,
2139                             uint32_t in_len,
2140                             uint8_t **out_data,
2141                             uint32_t max_out_len,
2142                             uint32_t *out_len)
2143 {
2144         VFS_FIND(fsctl);
2145         return handle->fns->fsctl_fn(handle, fsp, ctx, function, req_flags,
2146                                      in_data, in_len, out_data, max_out_len,
2147                                      out_len);
2148 }
2149
2150 NTSTATUS smb_vfs_call_fget_dos_attributes(struct vfs_handle_struct *handle,
2151                                           struct files_struct *fsp,
2152                                           uint32_t *dosmode)
2153 {
2154         VFS_FIND(fget_dos_attributes);
2155         return handle->fns->fget_dos_attributes_fn(handle, fsp, dosmode);
2156 }
2157
2158 NTSTATUS smb_vfs_call_fset_dos_attributes(struct vfs_handle_struct *handle,
2159                                           struct files_struct *fsp,
2160                                           uint32_t dosmode)
2161 {
2162         VFS_FIND(fset_dos_attributes);
2163         return handle->fns->fset_dos_attributes_fn(handle, fsp, dosmode);
2164 }
2165
2166 struct tevent_req *smb_vfs_call_offload_read_send(TALLOC_CTX *mem_ctx,
2167                                                   struct tevent_context *ev,
2168                                                   struct vfs_handle_struct *handle,
2169                                                   struct files_struct *fsp,
2170                                                   uint32_t fsctl,
2171                                                   uint32_t ttl,
2172                                                   off_t offset,
2173                                                   size_t to_copy)
2174 {
2175         VFS_FIND(offload_read_send);
2176         return handle->fns->offload_read_send_fn(mem_ctx, ev, handle,
2177                                                  fsp, fsctl,
2178                                                  ttl, offset, to_copy);
2179 }
2180
2181 NTSTATUS smb_vfs_call_offload_read_recv(struct tevent_req *req,
2182                                         struct vfs_handle_struct *handle,
2183                                         TALLOC_CTX *mem_ctx,
2184                                         uint32_t *flags,
2185                                         uint64_t *xferlen,
2186                                         DATA_BLOB *token_blob)
2187 {
2188         VFS_FIND(offload_read_recv);
2189         return handle->fns->offload_read_recv_fn(req, handle, mem_ctx, flags, xferlen, token_blob);
2190 }
2191
2192 struct tevent_req *smb_vfs_call_offload_write_send(struct vfs_handle_struct *handle,
2193                                                    TALLOC_CTX *mem_ctx,
2194                                                    struct tevent_context *ev,
2195                                                    uint32_t fsctl,
2196                                                    DATA_BLOB *token,
2197                                                    off_t transfer_offset,
2198                                                    struct files_struct *dest_fsp,
2199                                                    off_t dest_off,
2200                                                    off_t num)
2201 {
2202         VFS_FIND(offload_write_send);
2203         return handle->fns->offload_write_send_fn(handle, mem_ctx, ev, fsctl,
2204                                                token, transfer_offset,
2205                                                dest_fsp, dest_off, num);
2206 }
2207
2208 NTSTATUS smb_vfs_call_offload_write_recv(struct vfs_handle_struct *handle,
2209                                          struct tevent_req *req,
2210                                          off_t *copied)
2211 {
2212         VFS_FIND(offload_write_recv);
2213         return handle->fns->offload_write_recv_fn(handle, req, copied);
2214 }
2215
2216 struct smb_vfs_call_get_dos_attributes_state {
2217         files_struct *dir_fsp;
2218         NTSTATUS (*recv_fn)(struct tevent_req *req,
2219                             struct vfs_aio_state *aio_state,
2220                             uint32_t *dosmode);
2221         struct vfs_aio_state aio_state;
2222         uint32_t dos_attributes;
2223 };
2224
2225 static void smb_vfs_call_get_dos_attributes_done(struct tevent_req *subreq);
2226
2227 struct tevent_req *smb_vfs_call_get_dos_attributes_send(
2228                         TALLOC_CTX *mem_ctx,
2229                         struct tevent_context *ev,
2230                         struct vfs_handle_struct *handle,
2231                         files_struct *dir_fsp,
2232                         struct smb_filename *smb_fname)
2233 {
2234         struct tevent_req *req = NULL;
2235         struct smb_vfs_call_get_dos_attributes_state *state = NULL;
2236         struct tevent_req *subreq = NULL;
2237
2238         req = tevent_req_create(mem_ctx, &state,
2239                                 struct smb_vfs_call_get_dos_attributes_state);
2240         if (req == NULL) {
2241                 return NULL;
2242         }
2243
2244         VFS_FIND(get_dos_attributes_send);
2245
2246         *state = (struct smb_vfs_call_get_dos_attributes_state) {
2247                 .dir_fsp = dir_fsp,
2248                 .recv_fn = handle->fns->get_dos_attributes_recv_fn,
2249         };
2250
2251         subreq = handle->fns->get_dos_attributes_send_fn(mem_ctx,
2252                                                          ev,
2253                                                          handle,
2254                                                          dir_fsp,
2255                                                          smb_fname);
2256         if (tevent_req_nomem(subreq, req)) {
2257                 return tevent_req_post(req, ev);
2258         }
2259         tevent_req_defer_callback(req, ev);
2260
2261         tevent_req_set_callback(subreq,
2262                                 smb_vfs_call_get_dos_attributes_done,
2263                                 req);
2264
2265         return req;
2266 }
2267
2268 static void smb_vfs_call_get_dos_attributes_done(struct tevent_req *subreq)
2269 {
2270         struct tevent_req *req =
2271                 tevent_req_callback_data(subreq,
2272                 struct tevent_req);
2273         struct smb_vfs_call_get_dos_attributes_state *state =
2274                 tevent_req_data(req,
2275                 struct smb_vfs_call_get_dos_attributes_state);
2276         NTSTATUS status;
2277         bool ok;
2278
2279         /*
2280          * Make sure we run as the user again
2281          */
2282         ok = change_to_user_and_service_by_fsp(state->dir_fsp);
2283         SMB_ASSERT(ok);
2284
2285         status = state->recv_fn(subreq,
2286                                 &state->aio_state,
2287                                 &state->dos_attributes);
2288         TALLOC_FREE(subreq);
2289         if (tevent_req_nterror(req, status)) {
2290                 return;
2291         }
2292
2293         tevent_req_done(req);
2294 }
2295
2296 NTSTATUS smb_vfs_call_get_dos_attributes_recv(
2297                 struct tevent_req *req,
2298                 struct vfs_aio_state *aio_state,
2299                 uint32_t *dos_attributes)
2300 {
2301         struct smb_vfs_call_get_dos_attributes_state *state =
2302                 tevent_req_data(req,
2303                 struct smb_vfs_call_get_dos_attributes_state);
2304         NTSTATUS status;
2305
2306         if (tevent_req_is_nterror(req, &status)) {
2307                 tevent_req_received(req);
2308                 return status;
2309         }
2310
2311         *aio_state = state->aio_state;
2312         *dos_attributes = state->dos_attributes;
2313         tevent_req_received(req);
2314         return NT_STATUS_OK;
2315 }
2316
2317 NTSTATUS smb_vfs_call_fget_compression(vfs_handle_struct *handle,
2318                                       TALLOC_CTX *mem_ctx,
2319                                       struct files_struct *fsp,
2320                                       uint16_t *_compression_fmt)
2321 {
2322         VFS_FIND(fget_compression);
2323         return handle->fns->fget_compression_fn(handle, mem_ctx, fsp,
2324                                                _compression_fmt);
2325 }
2326
2327 NTSTATUS smb_vfs_call_set_compression(vfs_handle_struct *handle,
2328                                       TALLOC_CTX *mem_ctx,
2329                                       struct files_struct *fsp,
2330                                       uint16_t compression_fmt)
2331 {
2332         VFS_FIND(set_compression);
2333         return handle->fns->set_compression_fn(handle, mem_ctx, fsp,
2334                                                compression_fmt);
2335 }
2336
2337 NTSTATUS smb_vfs_call_snap_check_path(vfs_handle_struct *handle,
2338                                       TALLOC_CTX *mem_ctx,
2339                                       const char *service_path,
2340                                       char **base_volume)
2341 {
2342         VFS_FIND(snap_check_path);
2343         return handle->fns->snap_check_path_fn(handle, mem_ctx, service_path,
2344                                                base_volume);
2345 }
2346
2347 NTSTATUS smb_vfs_call_snap_create(struct vfs_handle_struct *handle,
2348                                   TALLOC_CTX *mem_ctx,
2349                                   const char *base_volume,
2350                                   time_t *tstamp,
2351                                   bool rw,
2352                                   char **base_path,
2353                                   char **snap_path)
2354 {
2355         VFS_FIND(snap_create);
2356         return handle->fns->snap_create_fn(handle, mem_ctx, base_volume, tstamp,
2357                                            rw, base_path, snap_path);
2358 }
2359
2360 NTSTATUS smb_vfs_call_snap_delete(struct vfs_handle_struct *handle,
2361                                   TALLOC_CTX *mem_ctx,
2362                                   char *base_path,
2363                                   char *snap_path)
2364 {
2365         VFS_FIND(snap_delete);
2366         return handle->fns->snap_delete_fn(handle, mem_ctx, base_path,
2367                                            snap_path);
2368 }
2369
2370 NTSTATUS smb_vfs_call_fget_nt_acl(struct vfs_handle_struct *handle,
2371                                   struct files_struct *fsp,
2372                                   uint32_t security_info,
2373                                   TALLOC_CTX *mem_ctx,
2374                                   struct security_descriptor **ppdesc)
2375 {
2376         VFS_FIND(fget_nt_acl);
2377         return handle->fns->fget_nt_acl_fn(handle, fsp, security_info,
2378                                            mem_ctx, ppdesc);
2379 }
2380
2381 NTSTATUS smb_vfs_call_fset_nt_acl(struct vfs_handle_struct *handle,
2382                                   struct files_struct *fsp,
2383                                   uint32_t security_info_sent,
2384                                   const struct security_descriptor *psd)
2385 {
2386         VFS_FIND(fset_nt_acl);
2387         return handle->fns->fset_nt_acl_fn(handle, fsp, security_info_sent,
2388                                            psd);
2389 }
2390
2391 NTSTATUS smb_vfs_call_audit_file(struct vfs_handle_struct *handle,
2392                                  struct smb_filename *file,
2393                                  struct security_acl *sacl,
2394                                  uint32_t access_requested,
2395                                  uint32_t access_denied)
2396 {
2397         VFS_FIND(audit_file);
2398         return handle->fns->audit_file_fn(handle,
2399                                           file,
2400                                           sacl,
2401                                           access_requested,
2402                                           access_denied);
2403 }
2404
2405 SMB_ACL_T smb_vfs_call_sys_acl_get_fd(struct vfs_handle_struct *handle,
2406                                       struct files_struct *fsp,
2407                                       SMB_ACL_TYPE_T type,
2408                                       TALLOC_CTX *mem_ctx)
2409 {
2410         VFS_FIND(sys_acl_get_fd);
2411         return handle->fns->sys_acl_get_fd_fn(handle, fsp, type, mem_ctx);
2412 }
2413
2414 int smb_vfs_call_sys_acl_blob_get_fd(struct vfs_handle_struct *handle,
2415                                      struct files_struct *fsp,
2416                                      TALLOC_CTX *mem_ctx,
2417                                      char **blob_description,
2418                                      DATA_BLOB *blob)
2419 {
2420         VFS_FIND(sys_acl_blob_get_fd);
2421         return handle->fns->sys_acl_blob_get_fd_fn(handle, fsp, mem_ctx, blob_description, blob);
2422 }
2423
2424 int smb_vfs_call_sys_acl_set_fd(struct vfs_handle_struct *handle,
2425                                 struct files_struct *fsp,
2426                                 SMB_ACL_TYPE_T type,
2427                                 SMB_ACL_T theacl)
2428 {
2429         VFS_FIND(sys_acl_set_fd);
2430         return handle->fns->sys_acl_set_fd_fn(handle, fsp, type, theacl);
2431 }
2432
2433 int smb_vfs_call_sys_acl_delete_def_fd(struct vfs_handle_struct *handle,
2434                                 struct files_struct *fsp)
2435 {
2436         VFS_FIND(sys_acl_delete_def_fd);
2437         return handle->fns->sys_acl_delete_def_fd_fn(handle, fsp);
2438 }
2439
2440 struct smb_vfs_call_getxattrat_state {
2441         files_struct *dir_fsp;
2442         ssize_t (*recv_fn)(struct tevent_req *req,
2443                            struct vfs_aio_state *aio_state,
2444                            TALLOC_CTX *mem_ctx,
2445                            uint8_t **xattr_value);
2446         ssize_t retval;
2447         uint8_t *xattr_value;
2448         struct vfs_aio_state aio_state;
2449 };
2450
2451 static void smb_vfs_call_getxattrat_done(struct tevent_req *subreq);
2452
2453 struct tevent_req *smb_vfs_call_getxattrat_send(
2454                         TALLOC_CTX *mem_ctx,
2455                         struct tevent_context *ev,
2456                         struct vfs_handle_struct *handle,
2457                         files_struct *dir_fsp,
2458                         const struct smb_filename *smb_fname,
2459                         const char *xattr_name,
2460                         size_t alloc_hint)
2461 {
2462         struct tevent_req *req = NULL;
2463         struct smb_vfs_call_getxattrat_state *state = NULL;
2464         struct tevent_req *subreq = NULL;
2465
2466         req = tevent_req_create(mem_ctx, &state,
2467                                 struct smb_vfs_call_getxattrat_state);
2468         if (req == NULL) {
2469                 return NULL;
2470         }
2471
2472         VFS_FIND(getxattrat_send);
2473
2474         *state = (struct smb_vfs_call_getxattrat_state) {
2475                 .dir_fsp = dir_fsp,
2476                 .recv_fn = handle->fns->getxattrat_recv_fn,
2477         };
2478
2479         subreq = handle->fns->getxattrat_send_fn(mem_ctx,
2480                                                  ev,
2481                                                  handle,
2482                                                  dir_fsp,
2483                                                  smb_fname,
2484                                                  xattr_name,
2485                                                  alloc_hint);
2486         if (tevent_req_nomem(subreq, req)) {
2487                 return tevent_req_post(req, ev);
2488         }
2489         tevent_req_defer_callback(req, ev);
2490
2491         tevent_req_set_callback(subreq, smb_vfs_call_getxattrat_done, req);
2492         return req;
2493 }
2494
2495 static void smb_vfs_call_getxattrat_done(struct tevent_req *subreq)
2496 {
2497         struct tevent_req *req = tevent_req_callback_data(
2498                 subreq, struct tevent_req);
2499         struct smb_vfs_call_getxattrat_state *state = tevent_req_data(
2500                 req, struct smb_vfs_call_getxattrat_state);
2501         bool ok;
2502
2503         /*
2504          * Make sure we run as the user again
2505          */
2506         ok = change_to_user_and_service_by_fsp(state->dir_fsp);
2507         SMB_ASSERT(ok);
2508
2509         state->retval = state->recv_fn(subreq,
2510                                        &state->aio_state,
2511                                        state,
2512                                        &state->xattr_value);
2513         TALLOC_FREE(subreq);
2514         if (state->retval == -1) {
2515                 tevent_req_error(req, state->aio_state.error);
2516                 return;
2517         }
2518
2519         tevent_req_done(req);
2520 }
2521
2522 ssize_t smb_vfs_call_getxattrat_recv(struct tevent_req *req,
2523                                      struct vfs_aio_state *aio_state,
2524                                      TALLOC_CTX *mem_ctx,
2525                                      uint8_t **xattr_value)
2526 {
2527         struct smb_vfs_call_getxattrat_state *state = tevent_req_data(
2528                 req, struct smb_vfs_call_getxattrat_state);
2529         size_t xattr_size;
2530
2531         if (tevent_req_is_unix_error(req, &aio_state->error)) {
2532                 tevent_req_received(req);
2533                 return -1;
2534         }
2535
2536         *aio_state = state->aio_state;
2537         xattr_size = state->retval;
2538         if (xattr_value != NULL) {
2539                 *xattr_value = talloc_move(mem_ctx, &state->xattr_value);
2540         }
2541
2542         tevent_req_received(req);
2543         return xattr_size;
2544 }
2545
2546 ssize_t smb_vfs_call_fgetxattr(struct vfs_handle_struct *handle,
2547                                struct files_struct *fsp, const char *name,
2548                                void *value, size_t size)
2549 {
2550         VFS_FIND(fgetxattr);
2551         return handle->fns->fgetxattr_fn(handle, fsp, name, value, size);
2552 }
2553
2554 ssize_t smb_vfs_call_flistxattr(struct vfs_handle_struct *handle,
2555                                 struct files_struct *fsp, char *list,
2556                                 size_t size)
2557 {
2558         VFS_FIND(flistxattr);
2559         return handle->fns->flistxattr_fn(handle, fsp, list, size);
2560 }
2561
2562 int smb_vfs_call_fremovexattr(struct vfs_handle_struct *handle,
2563                               struct files_struct *fsp, const char *name)
2564 {
2565         VFS_FIND(fremovexattr);
2566         return handle->fns->fremovexattr_fn(handle, fsp, name);
2567 }
2568
2569 int smb_vfs_call_fsetxattr(struct vfs_handle_struct *handle,
2570                            struct files_struct *fsp, const char *name,
2571                            const void *value, size_t size, int flags)
2572 {
2573         VFS_FIND(fsetxattr);
2574         return handle->fns->fsetxattr_fn(handle, fsp, name, value, size, flags);
2575 }
2576
2577 bool smb_vfs_call_aio_force(struct vfs_handle_struct *handle,
2578                             struct files_struct *fsp)
2579 {
2580         VFS_FIND(aio_force);
2581         return handle->fns->aio_force_fn(handle, fsp);
2582 }
2583
2584 NTSTATUS smb_vfs_call_durable_cookie(struct vfs_handle_struct *handle,
2585                                      struct files_struct *fsp,
2586                                      TALLOC_CTX *mem_ctx,
2587                                      DATA_BLOB *cookie)
2588 {
2589         VFS_FIND(durable_cookie);
2590         return handle->fns->durable_cookie_fn(handle, fsp, mem_ctx, cookie);
2591 }
2592
2593 NTSTATUS smb_vfs_call_durable_disconnect(struct vfs_handle_struct *handle,
2594                                          struct files_struct *fsp,
2595                                          const DATA_BLOB old_cookie,
2596                                          TALLOC_CTX *mem_ctx,
2597                                          DATA_BLOB *new_cookie)
2598 {
2599         VFS_FIND(durable_disconnect);
2600         return handle->fns->durable_disconnect_fn(handle, fsp, old_cookie,
2601                                                   mem_ctx, new_cookie);
2602 }
2603
2604 NTSTATUS smb_vfs_call_durable_reconnect(struct vfs_handle_struct *handle,
2605                                         struct smb_request *smb1req,
2606                                         struct smbXsrv_open *op,
2607                                         const DATA_BLOB old_cookie,
2608                                         TALLOC_CTX *mem_ctx,
2609                                         struct files_struct **fsp,
2610                                         DATA_BLOB *new_cookie)
2611 {
2612         VFS_FIND(durable_reconnect);
2613         return handle->fns->durable_reconnect_fn(handle, smb1req, op,
2614                                                  old_cookie, mem_ctx, fsp,
2615                                                  new_cookie);
2616 }
2617
2618 NTSTATUS smb_vfs_call_freaddir_attr(struct vfs_handle_struct *handle,
2619                                     struct files_struct *fsp,
2620                                     TALLOC_CTX *mem_ctx,
2621                                     struct readdir_attr_data **attr_data)
2622 {
2623         VFS_FIND(freaddir_attr);
2624         return handle->fns->freaddir_attr_fn(handle,
2625                                              fsp,
2626                                              mem_ctx,
2627                                              attr_data);
2628 }
2629
2630 bool smb_vfs_call_lock(struct vfs_handle_struct *handle,
2631                        struct files_struct *fsp, int op, off_t offset,
2632                        off_t count, int type)
2633 {
2634         VFS_FIND(lock);
2635         return handle->fns->lock_fn(handle, fsp, op, offset, count, type);
2636 }
2637
2638 bool smb_vfs_call_getlock(struct vfs_handle_struct *handle,
2639                           struct files_struct *fsp, off_t *poffset,
2640                           off_t *pcount, int *ptype, pid_t *ppid)
2641 {
2642         VFS_FIND(getlock);
2643         return handle->fns->getlock_fn(handle, fsp, poffset, pcount, ptype,
2644                                        ppid);
2645 }
2646
2647 NTSTATUS smb_vfs_call_brl_lock_windows(struct vfs_handle_struct *handle,
2648                                        struct byte_range_lock *br_lck,
2649                                        struct lock_struct *plock)
2650 {
2651         VFS_FIND(brl_lock_windows);
2652         return handle->fns->brl_lock_windows_fn(handle, br_lck, plock);
2653 }
2654
2655 bool smb_vfs_call_brl_unlock_windows(struct vfs_handle_struct *handle,
2656                                      struct byte_range_lock *br_lck,
2657                                      const struct lock_struct *plock)
2658 {
2659         VFS_FIND(brl_unlock_windows);
2660         return handle->fns->brl_unlock_windows_fn(handle, br_lck, plock);
2661 }