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
  35 #undef DBGC_CLASS
  36 #define DBGC_CLASS DBGC_VFS
  37
  38 static_decl_vfs;
  39
  40 struct vfs_fsp_data {
  41     struct vfs_fsp_data *next;
  42     struct vfs_handle_struct *owner;
  43     void (*destroy)(void *p_data);
  44     void *_dummy_;
  45     /* NOTE: This structure contains four pointers so that we can guarantee
  46      * that the end of the structure is always both 4-byte and 8-byte aligned.
  47      */
  48 };
  49
  50 struct vfs_init_function_entry {
  51         char *name;
  52         struct vfs_init_function_entry *prev, *next;
  53         const struct vfs_fn_pointers *fns;
  54 };
  55
  56 /****************************************************************************
  57     maintain the list of available backends
  58 ****************************************************************************/
  59
  60 static struct vfs_init_function_entry *vfs_find_backend_entry(const char *name)
  61 {
  62         struct vfs_init_function_entry *entry = backends;
  63
  64         DEBUG(10, ("vfs_find_backend_entry called for %s\n", name));
  65
  66         while(entry) {
  67                 if (strcmp(entry->name, name)==0) return entry;
  68                 entry = entry->next;
  69         }
  70
  71         return NULL;
  72 }
  73
  74 NTSTATUS smb_register_vfs(int version, const char *name,
  75                           const struct vfs_fn_pointers *fns)
  76 {
  77         struct vfs_init_function_entry *entry = backends;
  78
  79         if ((version != SMB_VFS_INTERFACE_VERSION)) {
  80                 DEBUG(0, ("Failed to register vfs module.\n"
  81                           "The module was compiled against SMB_VFS_INTERFACE_VERSION %d,\n"
  82                           "current SMB_VFS_INTERFACE_VERSION is %d.\n"
  83                           "Please recompile against the current Samba Version!\n",
  84                           version, SMB_VFS_INTERFACE_VERSION));
  85                 return NT_STATUS_OBJECT_TYPE_MISMATCH;
  86         }
  87
  88         if (!name || !name[0]) {
  89                 DEBUG(0,("smb_register_vfs() called with NULL pointer or empty name!\n"));
  90                 return NT_STATUS_INVALID_PARAMETER;
  91         }
  92
  93         if (vfs_find_backend_entry(name)) {
  94                 DEBUG(0,("VFS module %s already loaded!\n", name));
  95                 return NT_STATUS_OBJECT_NAME_COLLISION;
  96         }
  97
  98         entry = SMB_XMALLOC_P(struct vfs_init_function_entry);
  99         entry->name = smb_xstrdup(name);
 100         entry->fns = fns;
 101
 102         DLIST_ADD(backends, entry);
 103         DEBUG(5, ("Successfully added vfs backend '%s'\n", name));
 104         return NT_STATUS_OK;
 105 }
 106
 107 /****************************************************************************
 108   initialise default vfs hooks
 109 ****************************************************************************/
 110
 111 static void vfs_init_default(connection_struct *conn)
 112 {
 113         DEBUG(3, ("Initialising default vfs hooks\n"));
 114         vfs_init_custom(conn, DEFAULT_VFS_MODULE_NAME);
 115 }
 116
 117 /****************************************************************************
 118   initialise custom vfs hooks
 119  ****************************************************************************/
 120
 121 bool vfs_init_custom(connection_struct *conn, const char *vfs_object)
 122 {
 123         char *module_path = NULL;
 124         char *module_name = NULL;
 125         char *module_param = NULL, *p;
 126         vfs_handle_struct *handle;
 127         const struct vfs_init_function_entry *entry;
 128
 129         if (!conn||!vfs_object||!vfs_object[0]) {
 130                 DEBUG(0, ("vfs_init_custom() called with NULL pointer or "
 131                           "empty vfs_object!\n"));
 132                 return False;
 133         }
 134
 135         if(!backends) {
 136                 static_init_vfs;
 137         }
 138
 139         DEBUG(3, ("Initialising custom vfs hooks from [%s]\n", vfs_object));
 140
 141         module_path = smb_xstrdup(vfs_object);
 142
 143         p = strchr_m(module_path, ':');
 144
 145         if (p) {
 146                 *p = 0;
 147                 module_param = p+1;
 148                 trim_char(module_param, ' ', ' ');
 149         }
 150
 151         trim_char(module_path, ' ', ' ');
 152
 153         module_name = smb_xstrdup(module_path);
 154
 155         if ((module_name[0] == '/') &&
 156             (strcmp(module_path, DEFAULT_VFS_MODULE_NAME) != 0)) {
 157
 158                 /*
 159                  * Extract the module name from the path. Just use the base
 160                  * name of the last path component.
 161                  */
 162
 163                 SAFE_FREE(module_name);
 164                 module_name = smb_xstrdup(strrchr_m(module_path, '/')+1);
 165
 166                 p = strchr_m(module_name, '.');
 167
 168                 if (p != NULL) {
 169                         *p = '\0';
 170                 }
 171         }
 172
 173         /* First, try to load the module with the new module system */
 174         entry = vfs_find_backend_entry(module_name);
 175         if (!entry) {
 176                 NTSTATUS status;
 177
 178                 DEBUG(5, ("vfs module [%s] not loaded - trying to load...\n",
 179                           vfs_object));
 180
 181                 status = smb_load_module("vfs", module_path);
 182                 if (!NT_STATUS_IS_OK(status)) {
 183                         DEBUG(0, ("error probing vfs module '%s': %s\n",
 184                                   module_path, nt_errstr(status)));
 185                         goto fail;
 186                 }
 187
 188                 entry = vfs_find_backend_entry(module_name);
 189                 if (!entry) {
 190                         DEBUG(0,("Can't find a vfs module [%s]\n",vfs_object));
 191                         goto fail;
 192                 }
 193         }
 194
 195         DEBUGADD(5,("Successfully loaded vfs module [%s] with the new modules system\n", vfs_object));
 196
 197         handle = talloc_zero(conn, vfs_handle_struct);
 198         if (!handle) {
 199                 DEBUG(0,("TALLOC_ZERO() failed!\n"));
 200                 goto fail;
 201         }
 202         handle->conn = conn;
 203         handle->fns = entry->fns;
 204         if (module_param) {
 205                 handle->param = talloc_strdup(conn, module_param);
 206         }
 207         DLIST_ADD(conn->vfs_handles, handle);
 208
 209         SAFE_FREE(module_path);
 210         SAFE_FREE(module_name);
 211         return True;
 212
 213  fail:
 214         SAFE_FREE(module_path);
 215         SAFE_FREE(module_name);
 216         return False;
 217 }
 218
 219 /*****************************************************************
 220  Allow VFS modules to extend files_struct with VFS-specific state.
 221  This will be ok for small numbers of extensions, but might need to
 222  be refactored if it becomes more widely used.
 223 ******************************************************************/
 224
 225 #define EXT_DATA_AREA(e) ((uint8_t *)(e) + sizeof(struct vfs_fsp_data))
 226
 227 void *vfs_add_fsp_extension_notype(vfs_handle_struct *handle,
 228                                    files_struct *fsp, size_t ext_size,
 229                                    void (*destroy_fn)(void *p_data))
 230 {
 231         struct vfs_fsp_data *ext;
 232         void * ext_data;
 233
 234         /* Prevent VFS modules adding multiple extensions. */
 235         if ((ext_data = vfs_fetch_fsp_extension(handle, fsp))) {
 236                 return ext_data;
 237         }
 238
 239         ext = (struct vfs_fsp_data *)TALLOC_ZERO(
 240                 handle->conn, sizeof(struct vfs_fsp_data) + ext_size);
 241         if (ext == NULL) {
 242                 return NULL;
 243         }
 244
 245         ext->owner = handle;
 246         ext->next = fsp->vfs_extension;
 247         ext->destroy = destroy_fn;
 248         fsp->vfs_extension = ext;
 249         return EXT_DATA_AREA(ext);
 250 }
 251
 252 void vfs_remove_fsp_extension(vfs_handle_struct *handle, files_struct *fsp)
 253 {
 254         struct vfs_fsp_data *curr;
 255         struct vfs_fsp_data *prev;
 256
 257         for (curr = fsp->vfs_extension, prev = NULL;
 258              curr;
 259              prev = curr, curr = curr->next) {
 260                 if (curr->owner == handle) {
 261                     if (prev) {
 262                             prev->next = curr->next;
 263                     } else {
 264                             fsp->vfs_extension = curr->next;
 265                     }
 266                     if (curr->destroy) {
 267                             curr->destroy(EXT_DATA_AREA(curr));
 268                     }
 269                     TALLOC_FREE(curr);
 270                     return;
 271                 }
 272         }
 273 }
 274
 275 void vfs_remove_all_fsp_extensions(files_struct *fsp)
 276 {
 277         struct vfs_fsp_data *curr;
 278         struct vfs_fsp_data *next;
 279
 280         for (curr = fsp->vfs_extension; curr; curr = next) {
 281
 282                 next = curr->next;
 283                 fsp->vfs_extension = next;
 284
 285                 if (curr->destroy) {
 286                         curr->destroy(EXT_DATA_AREA(curr));
 287                 }
 288                 TALLOC_FREE(curr);
 289         }
 290 }
 291
 292 void *vfs_memctx_fsp_extension(vfs_handle_struct *handle, files_struct *fsp)
 293 {
 294         struct vfs_fsp_data *head;
 295
 296         for (head = fsp->vfs_extension; head; head = head->next) {
 297                 if (head->owner == handle) {
 298                         return head;
 299                 }
 300         }
 301
 302         return NULL;
 303 }
 304
 305 void *vfs_fetch_fsp_extension(vfs_handle_struct *handle, files_struct *fsp)
 306 {
 307         struct vfs_fsp_data *head;
 308
 309         head = (struct vfs_fsp_data *)vfs_memctx_fsp_extension(handle, fsp);
 310         if (head != NULL) {
 311                 return EXT_DATA_AREA(head);
 312         }
 313
 314         return NULL;
 315 }
 316
 317 #undef EXT_DATA_AREA
 318
 319 /*****************************************************************
 320  Generic VFS init.
 321 ******************************************************************/
 322
 323 bool smbd_vfs_init(connection_struct *conn)
 324 {
 325         const char **vfs_objects;
 326         unsigned int i = 0;
 327         int j = 0;
 328
 329         /* Normal share - initialise with disk access functions */
 330         vfs_init_default(conn);
 331
 332         /* No need to load vfs modules for printer connections */
 333         if (conn->printer) {
 334                 return True;
 335         }
 336
 337         vfs_objects = lp_vfs_objects(SNUM(conn));
 338
 339         /* Override VFS functions if 'vfs object' was not specified*/
 340         if (!vfs_objects || !vfs_objects[0])
 341                 return True;
 342
 343         for (i=0; vfs_objects[i] ;) {
 344                 i++;
 345         }
 346
 347         for (j=i-1; j >= 0; j--) {
 348                 if (!vfs_init_custom(conn, vfs_objects[j])) {
 349                         DEBUG(0, ("smbd_vfs_init: vfs_init_custom failed for %s\n", vfs_objects[j]));
 350                         return False;
 351                 }
 352         }
 353         return True;
 354 }
 355
 356 /*******************************************************************
 357  Check if a file exists in the vfs.
 358 ********************************************************************/
 359
 360 NTSTATUS vfs_file_exist(connection_struct *conn, struct smb_filename *smb_fname)
 361 {
 362         /* Only return OK if stat was successful and S_ISREG */
 363         if ((SMB_VFS_STAT(conn, smb_fname) != -1) &&
 364             S_ISREG(smb_fname->st.st_ex_mode)) {
 365                 return NT_STATUS_OK;
 366         }
 367
 368         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 369 }
 370
 371 /****************************************************************************
 372  Read data from fsp on the vfs. (note: EINTR re-read differs from vfs_write_data)
 373 ****************************************************************************/
 374
 375 ssize_t vfs_read_data(files_struct *fsp, char *buf, size_t byte_count)
 376 {
 377         size_t total=0;
 378
 379         while (total < byte_count)
 380         {
 381                 ssize_t ret = SMB_VFS_READ(fsp, buf + total,
 382                                            byte_count - total);
 383
 384                 if (ret == 0) return total;
 385                 if (ret == -1) {
 386                         if (errno == EINTR)
 387                                 continue;
 388                         else
 389                                 return -1;
 390                 }
 391                 total += ret;
 392         }
 393         return (ssize_t)total;
 394 }
 395
 396 /****************************************************************************
 397  Write data to a fd on the vfs.
 398 ****************************************************************************/
 399
 400 ssize_t vfs_write_data(struct smb_request *req,
 401                         files_struct *fsp,
 402                         const char *buffer,
 403                         size_t N)
 404 {
 405         size_t total=0;
 406         ssize_t ret;
 407
 408         if (req && req->unread_bytes) {
 409                 int sockfd = req->xconn->transport.sock;
 410                 int old_flags;
 411                 SMB_ASSERT(req->unread_bytes == N);
 412                 /* VFS_RECVFILE must drain the socket
 413                  * before returning. */
 414                 req->unread_bytes = 0;
 415                 /* Ensure the socket is blocking. */
 416                 old_flags = fcntl(sockfd, F_GETFL, 0);
 417                 if (set_blocking(sockfd, true) == -1) {
 418                         return (ssize_t)-1;
 419                 }
 420                 ret = SMB_VFS_RECVFILE(sockfd,
 421                                         fsp,
 422                                         (off_t)-1,
 423                                         N);
 424                 if (fcntl(sockfd, F_SETFL, old_flags) == -1) {
 425                         return (ssize_t)-1;
 426                 }
 427                 return ret;
 428         }
 429
 430         while (total < N) {
 431                 ret = SMB_VFS_WRITE(fsp, buffer + total, N - total);
 432
 433                 if (ret == -1)
 434                         return -1;
 435                 if (ret == 0)
 436                         return total;
 437
 438                 total += ret;
 439         }
 440         return (ssize_t)total;
 441 }
 442
 443 ssize_t vfs_pwrite_data(struct smb_request *req,
 444                         files_struct *fsp,
 445                         const char *buffer,
 446                         size_t N,
 447                         off_t offset)
 448 {
 449         size_t total=0;
 450         ssize_t ret;
 451
 452         if (req && req->unread_bytes) {
 453                 int sockfd = req->xconn->transport.sock;
 454                 SMB_ASSERT(req->unread_bytes == N);
 455                 /* VFS_RECVFILE must drain the socket
 456                  * before returning. */
 457                 req->unread_bytes = 0;
 458                 /*
 459                  * Leave the socket non-blocking and
 460                  * use SMB_VFS_RECVFILE. If it returns
 461                  * EAGAIN || EWOULDBLOCK temporarily set
 462                  * the socket blocking and retry
 463                  * the RECVFILE.
 464                  */
 465                 while (total < N) {
 466                         ret = SMB_VFS_RECVFILE(sockfd,
 467                                                 fsp,
 468                                                 offset + total,
 469                                                 N - total);
 470                         if (ret == 0 || (ret == -1 &&
 471                                          (errno == EAGAIN ||
 472                                           errno == EWOULDBLOCK))) {
 473                                 int old_flags;
 474                                 /* Ensure the socket is blocking. */
 475                                 old_flags = fcntl(sockfd, F_GETFL, 0);
 476                                 if (set_blocking(sockfd, true) == -1) {
 477                                         return (ssize_t)-1;
 478                                 }
 479                                 ret = SMB_VFS_RECVFILE(sockfd,
 480                                                         fsp,
 481                                                         offset + total,
 482                                                         N - total);
 483                                 if (fcntl(sockfd, F_SETFL, old_flags) == -1) {
 484                                         return (ssize_t)-1;
 485                                 }
 486                                 if (ret == -1) {
 487                                         return (ssize_t)-1;
 488                                 }
 489                                 total += ret;
 490                                 return (ssize_t)total;
 491                         }
 492                         /* Any other error case. */
 493                         if (ret == -1) {
 494                                 return ret;
 495                         }
 496                         total += ret;
 497                 }
 498                 return (ssize_t)total;
 499         }
 500
 501         while (total < N) {
 502                 ret = SMB_VFS_PWRITE(fsp, buffer + total, N - total,
 503                                      offset + total);
 504
 505                 if (ret == -1)
 506                         return -1;
 507                 if (ret == 0)
 508                         return total;
 509
 510                 total += ret;
 511         }
 512         return (ssize_t)total;
 513 }
 514 /****************************************************************************
 515  An allocate file space call using the vfs interface.
 516  Allocates space for a file from a filedescriptor.
 517  Returns 0 on success, -1 on failure.
 518 ****************************************************************************/
 519
 520 int vfs_allocate_file_space(files_struct *fsp, uint64_t len)
 521 {
 522         int ret;
 523         connection_struct *conn = fsp->conn;
 524         uint64_t space_avail;
 525         uint64_t bsize,dfree,dsize;
 526         NTSTATUS status;
 527
 528         /*
 529          * Actually try and commit the space on disk....
 530          */
 531
 532         DEBUG(10,("vfs_allocate_file_space: file %s, len %.0f\n",
 533                   fsp_str_dbg(fsp), (double)len));
 534
 535         if (((off_t)len) < 0) {
 536                 DEBUG(0,("vfs_allocate_file_space: %s negative len "
 537                          "requested.\n", fsp_str_dbg(fsp)));
 538                 errno = EINVAL;
 539                 return -1;
 540         }
 541
 542         status = vfs_stat_fsp(fsp);
 543         if (!NT_STATUS_IS_OK(status)) {
 544                 return -1;
 545         }
 546
 547         if (len == (uint64_t)fsp->fsp_name->st.st_ex_size)
 548                 return 0;
 549
 550         if (len < (uint64_t)fsp->fsp_name->st.st_ex_size) {
 551                 /* Shrink - use ftruncate. */
 552
 553                 DEBUG(10,("vfs_allocate_file_space: file %s, shrink. Current "
 554                           "size %.0f\n", fsp_str_dbg(fsp),
 555                           (double)fsp->fsp_name->st.st_ex_size));
 556
 557                 contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_ALLOC_SHRINK);
 558
 559                 flush_write_cache(fsp, SAMBA_SIZECHANGE_FLUSH);
 560                 if ((ret = SMB_VFS_FTRUNCATE(fsp, (off_t)len)) != -1) {
 561                         set_filelen_write_cache(fsp, len);
 562                 }
 563
 564                 contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_ALLOC_SHRINK);
 565
 566                 return ret;
 567         }
 568
 569         /* Grow - we need to test if we have enough space. */
 570
 571         contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_ALLOC_GROW);
 572
 573         if (lp_strict_allocate(SNUM(fsp->conn))) {
 574                 /* See if we have a syscall that will allocate beyond
 575                    end-of-file without changing EOF. */
 576                 ret = SMB_VFS_FALLOCATE(fsp, VFS_FALLOCATE_FL_KEEP_SIZE,
 577                                         0, len);
 578         } else {
 579                 ret = 0;
 580         }
 581
 582         contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_ALLOC_GROW);
 583
 584         if (ret == 0) {
 585                 /* We changed the allocation size on disk, but not
 586                    EOF - exactly as required. We're done ! */
 587                 return 0;
 588         }
 589
 590         if (ret == -1 && errno == ENOSPC) {
 591                 return -1;
 592         }
 593
 594         len -= fsp->fsp_name->st.st_ex_size;
 595         len /= 1024; /* Len is now number of 1k blocks needed. */
 596         space_avail = get_dfree_info(conn, fsp->fsp_name->base_name,
 597                                      &bsize, &dfree, &dsize);
 598         if (space_avail == (uint64_t)-1) {
 599                 return -1;
 600         }
 601
 602         DEBUG(10,("vfs_allocate_file_space: file %s, grow. Current size %.0f, "
 603                   "needed blocks = %.0f, space avail = %.0f\n",
 604                   fsp_str_dbg(fsp), (double)fsp->fsp_name->st.st_ex_size, (double)len,
 605                   (double)space_avail));
 606
 607         if (len > space_avail) {
 608                 errno = ENOSPC;
 609                 return -1;
 610         }
 611
 612         return 0;
 613 }
 614
 615 /****************************************************************************
 616  A vfs set_filelen call.
 617  set the length of a file from a filedescriptor.
 618  Returns 0 on success, -1 on failure.
 619 ****************************************************************************/
 620
 621 int vfs_set_filelen(files_struct *fsp, off_t len)
 622 {
 623         int ret;
 624
 625         contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_SET_FILE_LEN);
 626
 627         DEBUG(10,("vfs_set_filelen: ftruncate %s to len %.0f\n",
 628                   fsp_str_dbg(fsp), (double)len));
 629         flush_write_cache(fsp, SAMBA_SIZECHANGE_FLUSH);
 630         if ((ret = SMB_VFS_FTRUNCATE(fsp, len)) != -1) {
 631                 set_filelen_write_cache(fsp, len);
 632                 notify_fname(fsp->conn, NOTIFY_ACTION_MODIFIED,
 633                              FILE_NOTIFY_CHANGE_SIZE
 634                              | FILE_NOTIFY_CHANGE_ATTRIBUTES,
 635                              fsp->fsp_name->base_name);
 636         }
 637
 638         contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_SET_FILE_LEN);
 639
 640         return ret;
 641 }
 642
 643 /****************************************************************************
 644  A slow version of fallocate. Fallback code if SMB_VFS_FALLOCATE
 645  fails. Needs to be outside of the default version of SMB_VFS_FALLOCATE
 646  as this is also called from the default SMB_VFS_FTRUNCATE code.
 647  Always extends the file size.
 648  Returns 0 on success, -1 on failure.
 649 ****************************************************************************/
 650
 651 #define SPARSE_BUF_WRITE_SIZE (32*1024)
 652
 653 int vfs_slow_fallocate(files_struct *fsp, off_t offset, off_t len)
 654 {
 655         ssize_t pwrite_ret;
 656         size_t total = 0;
 657
 658         if (!sparse_buf) {
 659                 sparse_buf = SMB_CALLOC_ARRAY(char, SPARSE_BUF_WRITE_SIZE);
 660                 if (!sparse_buf) {
 661                         errno = ENOMEM;
 662                         return -1;
 663                 }
 664         }
 665
 666         while (total < len) {
 667                 size_t curr_write_size = MIN(SPARSE_BUF_WRITE_SIZE, (len - total));
 668
 669                 pwrite_ret = SMB_VFS_PWRITE(fsp, sparse_buf, curr_write_size, offset + total);
 670                 if (pwrite_ret == -1) {
 671                         int saved_errno = errno;
 672                         DEBUG(10,("vfs_slow_fallocate: SMB_VFS_PWRITE for file "
 673                                   "%s failed with error %s\n",
 674                                   fsp_str_dbg(fsp), strerror(saved_errno)));
 675                         errno = saved_errno;
 676                         return -1;
 677                 }
 678                 total += pwrite_ret;
 679         }
 680
 681         return 0;
 682 }
 683
 684 /****************************************************************************
 685  A vfs fill sparse call.
 686  Writes zeros from the end of file to len, if len is greater than EOF.
 687  Used only by strict_sync.
 688  Returns 0 on success, -1 on failure.
 689 ****************************************************************************/
 690
 691 int vfs_fill_sparse(files_struct *fsp, off_t len)
 692 {
 693         int ret;
 694         NTSTATUS status;
 695         off_t offset;
 696         size_t num_to_write;
 697
 698         status = vfs_stat_fsp(fsp);
 699         if (!NT_STATUS_IS_OK(status)) {
 700                 return -1;
 701         }
 702
 703         if (len <= fsp->fsp_name->st.st_ex_size) {
 704                 return 0;
 705         }
 706
 707 #ifdef S_ISFIFO
 708         if (S_ISFIFO(fsp->fsp_name->st.st_ex_mode)) {
 709                 return 0;
 710         }
 711 #endif
 712
 713         DEBUG(10,("vfs_fill_sparse: write zeros in file %s from len %.0f to "
 714                   "len %.0f (%.0f bytes)\n", fsp_str_dbg(fsp),
 715                   (double)fsp->fsp_name->st.st_ex_size, (double)len,
 716                   (double)(len - fsp->fsp_name->st.st_ex_size)));
 717
 718         contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_FILL_SPARSE);
 719
 720         flush_write_cache(fsp, SAMBA_SIZECHANGE_FLUSH);
 721
 722         offset = fsp->fsp_name->st.st_ex_size;
 723         num_to_write = len - fsp->fsp_name->st.st_ex_size;
 724
 725         /* Only do this on non-stream file handles. */
 726         if (fsp->base_fsp == NULL) {
 727                 /* for allocation try fallocate first. This can fail on some
 728                  * platforms e.g. when the filesystem doesn't support it and no
 729                  * emulation is being done by the libc (like on AIX with JFS1). In that
 730                  * case we do our own emulation. fallocate implementations can
 731                  * return ENOTSUP or EINVAL in cases like that. */
 732                 ret = SMB_VFS_FALLOCATE(fsp, 0, offset, num_to_write);
 733                 if (ret == -1 && errno == ENOSPC) {
 734                         goto out;
 735                 }
 736                 if (ret == 0) {
 737                         goto out;
 738                 }
 739                 DEBUG(10,("vfs_fill_sparse: SMB_VFS_FALLOCATE failed with "
 740                         "error %d. Falling back to slow manual allocation\n", ret));
 741         }
 742
 743         ret = vfs_slow_fallocate(fsp, offset, num_to_write);
 744
 745  out:
 746
 747         if (ret == 0) {
 748                 set_filelen_write_cache(fsp, len);
 749         }
 750
 751         contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_FILL_SPARSE);
 752         return ret;
 753 }
 754
 755 /****************************************************************************
 756  Transfer some data (n bytes) between two file_struct's.
 757 ****************************************************************************/
 758
 759 static ssize_t vfs_pread_fn(void *file, void *buf, size_t len, off_t offset)
 760 {
 761         struct files_struct *fsp = (struct files_struct *)file;
 762
 763         return SMB_VFS_PREAD(fsp, buf, len, offset);
 764 }
 765
 766 static ssize_t vfs_pwrite_fn(void *file, const void *buf, size_t len, off_t offset)
 767 {
 768         struct files_struct *fsp = (struct files_struct *)file;
 769
 770         return SMB_VFS_PWRITE(fsp, buf, len, offset);
 771 }
 772
 773 off_t vfs_transfer_file(files_struct *in, files_struct *out, off_t n)
 774 {
 775         return transfer_file_internal((void *)in, (void *)out, n,
 776                                       vfs_pread_fn, vfs_pwrite_fn);
 777 }
 778
 779 /*******************************************************************
 780  A vfs_readdir wrapper which just returns the file name.
 781 ********************************************************************/
 782
 783 const char *vfs_readdirname(connection_struct *conn, void *p,
 784                             SMB_STRUCT_STAT *sbuf, char **talloced)
 785 {
 786         struct dirent *ptr= NULL;
 787         const char *dname;
 788         char *translated;
 789         NTSTATUS status;
 790
 791         if (!p)
 792                 return(NULL);
 793
 794         ptr = SMB_VFS_READDIR(conn, (DIR *)p, sbuf);
 795         if (!ptr)
 796                 return(NULL);
 797
 798         dname = ptr->d_name;
 799
 800
 801 #ifdef NEXT2
 802         if (telldir(p) < 0)
 803                 return(NULL);
 804 #endif
 805
 806 #ifdef HAVE_BROKEN_READDIR_NAME
 807         /* using /usr/ucb/cc is BAD */
 808         dname = dname - 2;
 809 #endif
 810
 811         status = SMB_VFS_TRANSLATE_NAME(conn, dname, vfs_translate_to_windows,
 812                                         talloc_tos(), &translated);
 813         if (NT_STATUS_EQUAL(status, NT_STATUS_NONE_MAPPED)) {
 814                 *talloced = NULL;
 815                 return dname;
 816         }
 817         *talloced = translated;
 818         if (!NT_STATUS_IS_OK(status)) {
 819                 return NULL;
 820         }
 821         return translated;
 822 }
 823
 824 /*******************************************************************
 825  A wrapper for vfs_chdir().
 826 ********************************************************************/
 827
 828 int vfs_ChDir(connection_struct *conn, const char *path)
 829 {
 830         int ret;
 831
 832         if (!LastDir) {
 833                 LastDir = SMB_STRDUP("");
 834         }
 835
 836         if (ISDOT(path)) {
 837                 return 0;
 838         }
 839
 840         if (*path == '/' && strcsequal(LastDir,path)) {
 841                 return 0;
 842         }
 843
 844         DEBUG(4,("vfs_ChDir to %s\n",path));
 845
 846         ret = SMB_VFS_CHDIR(conn,path);
 847         if (ret == 0) {
 848                 /* Global cache. */
 849                 SAFE_FREE(LastDir);
 850                 LastDir = SMB_STRDUP(path);
 851
 852                 /* conn cache. */
 853                 TALLOC_FREE(conn->cwd);
 854                 conn->cwd = vfs_GetWd(conn, conn);
 855                 DEBUG(4,("vfs_ChDir got %s\n",conn->cwd));
 856         }
 857         return ret;
 858 }
 859
 860 /*******************************************************************
 861  Return the absolute current directory path - given a UNIX pathname.
 862  Note that this path is returned in DOS format, not UNIX
 863  format. Note this can be called with conn == NULL.
 864 ********************************************************************/
 865
 866 char *vfs_GetWd(TALLOC_CTX *ctx, connection_struct *conn)
 867 {
 868         char *current_dir = NULL;
 869         char *result = NULL;
 870         DATA_BLOB cache_value;
 871         struct file_id key;
 872         struct smb_filename *smb_fname_dot = NULL;
 873         struct smb_filename *smb_fname_full = NULL;
 874
 875         if (!lp_getwd_cache()) {
 876                 goto nocache;
 877         }
 878
 879         smb_fname_dot = synthetic_smb_fname(ctx, ".", NULL, NULL);
 880         if (smb_fname_dot == NULL) {
 881                 errno = ENOMEM;
 882                 goto out;
 883         }
 884
 885         if (SMB_VFS_STAT(conn, smb_fname_dot) == -1) {
 886                 /*
 887                  * Known to fail for root: the directory may be NFS-mounted
 888                  * and exported with root_squash (so has no root access).
 889                  */
 890                 DEBUG(1,("vfs_GetWd: couldn't stat \".\" error %s "
 891                          "(NFS problem ?)\n", strerror(errno) ));
 892                 goto nocache;
 893         }
 894
 895         key = vfs_file_id_from_sbuf(conn, &smb_fname_dot->st);
 896
 897         if (!memcache_lookup(smbd_memcache(), GETWD_CACHE,
 898                              data_blob_const(&key, sizeof(key)),
 899                              &cache_value)) {
 900                 goto nocache;
 901         }
 902
 903         SMB_ASSERT((cache_value.length > 0)
 904                    && (cache_value.data[cache_value.length-1] == '\0'));
 905
 906         smb_fname_full = synthetic_smb_fname(ctx, (char *)cache_value.data,
 907                                              NULL, NULL);
 908         if (smb_fname_full == NULL) {
 909                 errno = ENOMEM;
 910                 goto out;
 911         }
 912
 913         if ((SMB_VFS_STAT(conn, smb_fname_full) == 0) &&
 914             (smb_fname_dot->st.st_ex_dev == smb_fname_full->st.st_ex_dev) &&
 915             (smb_fname_dot->st.st_ex_ino == smb_fname_full->st.st_ex_ino) &&
 916             (S_ISDIR(smb_fname_dot->st.st_ex_mode))) {
 917                 /*
 918                  * Ok, we're done
 919                  */
 920                 result = talloc_strdup(ctx, smb_fname_full->base_name);
 921                 if (result == NULL) {
 922                         errno = ENOMEM;
 923                 }
 924                 goto out;
 925         }
 926
 927  nocache:
 928
 929         /*
 930          * We don't have the information to hand so rely on traditional
 931          * methods. The very slow getcwd, which spawns a process on some
 932          * systems, or the not quite so bad getwd.
 933          */
 934
 935         current_dir = SMB_VFS_GETWD(conn);
 936         if (current_dir == NULL) {
 937                 DEBUG(0, ("vfs_GetWd: SMB_VFS_GETWD call failed: %s\n",
 938                           strerror(errno)));
 939                 goto out;
 940         }
 941
 942         if (lp_getwd_cache() && VALID_STAT(smb_fname_dot->st)) {
 943                 key = vfs_file_id_from_sbuf(conn, &smb_fname_dot->st);
 944
 945                 memcache_add(smbd_memcache(), GETWD_CACHE,
 946                              data_blob_const(&key, sizeof(key)),
 947                              data_blob_const(current_dir,
 948                                                 strlen(current_dir)+1));
 949         }
 950
 951         result = talloc_strdup(ctx, current_dir);
 952         if (result == NULL) {
 953                 errno = ENOMEM;
 954         }
 955
 956  out:
 957         TALLOC_FREE(smb_fname_dot);
 958         TALLOC_FREE(smb_fname_full);
 959         SAFE_FREE(current_dir);
 960         return result;
 961 }
 962
 963 /*******************************************************************
 964  Reduce a file name, removing .. elements and checking that
 965  it is below dir in the heirachy. This uses realpath.
 966  This function must run as root, and will return names
 967  and valid stat structs that can be checked on open.
 968 ********************************************************************/
 969
 970 NTSTATUS check_reduced_name_with_privilege(connection_struct *conn,
 971                         const char *fname,
 972                         struct smb_request *smbreq)
 973 {
 974         NTSTATUS status;
 975         TALLOC_CTX *ctx = talloc_tos();
 976         const char *conn_rootdir;
 977         size_t rootdir_len;
 978         char *dir_name = NULL;
 979         const char *last_component = NULL;
 980         char *resolved_name = NULL;
 981         char *saved_dir = NULL;
 982         struct smb_filename *smb_fname_cwd = NULL;
 983         struct privilege_paths *priv_paths = NULL;
 984         int ret;
 985
 986         DEBUG(3,("check_reduced_name_with_privilege [%s] [%s]\n",
 987                         fname,
 988                         conn->connectpath));
 989
 990
 991         priv_paths = talloc_zero(smbreq, struct privilege_paths);
 992         if (!priv_paths) {
 993                 status = NT_STATUS_NO_MEMORY;
 994                 goto err;
 995         }
 996
 997         if (!parent_dirname(ctx, fname, &dir_name, &last_component)) {
 998                 status = NT_STATUS_NO_MEMORY;
 999                 goto err;
1000         }
1001
1002         priv_paths->parent_name.base_name = talloc_strdup(priv_paths, dir_name);
1003         priv_paths->file_name.base_name = talloc_strdup(priv_paths, last_component);
1004
1005         if (priv_paths->parent_name.base_name == NULL ||
1006                         priv_paths->file_name.base_name == NULL) {
1007                 status = NT_STATUS_NO_MEMORY;
1008                 goto err;
1009         }
1010
1011         if (SMB_VFS_STAT(conn, &priv_paths->parent_name) != 0) {
1012                 status = map_nt_error_from_unix(errno);
1013                 goto err;
1014         }
1015         /* Remember where we were. */
1016         saved_dir = vfs_GetWd(ctx, conn);
1017         if (!saved_dir) {
1018                 status = map_nt_error_from_unix(errno);
1019                 goto err;
1020         }
1021
1022         /* Go to the parent directory to lock in memory. */
1023         if (vfs_ChDir(conn, priv_paths->parent_name.base_name) == -1) {
1024                 status = map_nt_error_from_unix(errno);
1025                 goto err;
1026         }
1027
1028         /* Get the absolute path of the parent directory. */
1029         resolved_name = SMB_VFS_REALPATH(conn,".");
1030         if (!resolved_name) {
1031                 status = map_nt_error_from_unix(errno);
1032                 goto err;
1033         }
1034
1035         if (*resolved_name != '/') {
1036                 DEBUG(0,("check_reduced_name_with_privilege: realpath "
1037                         "doesn't return absolute paths !\n"));
1038                 status = NT_STATUS_OBJECT_NAME_INVALID;
1039                 goto err;
1040         }
1041
1042         DEBUG(10,("check_reduced_name_with_privilege: realpath [%s] -> [%s]\n",
1043                 priv_paths->parent_name.base_name,
1044                 resolved_name));
1045
1046         /* Now check the stat value is the same. */
1047         smb_fname_cwd = synthetic_smb_fname(talloc_tos(), ".", NULL, NULL);
1048         if (smb_fname_cwd == NULL) {
1049                 status = NT_STATUS_NO_MEMORY;
1050                 goto err;
1051         }
1052
1053         if (SMB_VFS_LSTAT(conn, smb_fname_cwd) != 0) {
1054                 status = map_nt_error_from_unix(errno);
1055                 goto err;
1056         }
1057
1058         /* Ensure we're pointing at the same place. */
1059         if (!check_same_stat(&smb_fname_cwd->st, &priv_paths->parent_name.st)) {
1060                 DEBUG(0,("check_reduced_name_with_privilege: "
1061                         "device/inode/uid/gid on directory %s changed. "
1062                         "Denying access !\n",
1063                         priv_paths->parent_name.base_name));
1064                 status = NT_STATUS_ACCESS_DENIED;
1065                 goto err;
1066         }
1067
1068         /* Ensure we're below the connect path. */
1069
1070         conn_rootdir = SMB_VFS_CONNECTPATH(conn, fname);
1071         if (conn_rootdir == NULL) {
1072                 DEBUG(2, ("check_reduced_name_with_privilege: Could not get "
1073                         "conn_rootdir\n"));
1074                 status = NT_STATUS_ACCESS_DENIED;
1075                 goto err;
1076         }
1077
1078         rootdir_len = strlen(conn_rootdir);
1079         if (strncmp(conn_rootdir, resolved_name, rootdir_len) != 0) {
1080                 DEBUG(2, ("check_reduced_name_with_privilege: Bad access "
1081                         "attempt: %s is a symlink outside the "
1082                         "share path\n",
1083                         dir_name));
1084                 DEBUGADD(2, ("conn_rootdir =%s\n", conn_rootdir));
1085                 DEBUGADD(2, ("resolved_name=%s\n", resolved_name));
1086                 status = NT_STATUS_ACCESS_DENIED;
1087                 goto err;
1088         }
1089
1090         /* Now ensure that the last component either doesn't
1091            exist, or is *NOT* a symlink. */
1092
1093         ret = SMB_VFS_LSTAT(conn, &priv_paths->file_name);
1094         if (ret == -1) {
1095                 /* Errno must be ENOENT for this be ok. */
1096                 if (errno != ENOENT) {
1097                         status = map_nt_error_from_unix(errno);
1098                         DEBUG(2, ("check_reduced_name_with_privilege: "
1099                                 "LSTAT on %s failed with %s\n",
1100                                 priv_paths->file_name.base_name,
1101                                 nt_errstr(status)));
1102                         goto err;
1103                 }
1104         }
1105
1106         if (VALID_STAT(priv_paths->file_name.st) &&
1107                         S_ISLNK(priv_paths->file_name.st.st_ex_mode)) {
1108                 DEBUG(2, ("check_reduced_name_with_privilege: "
1109                         "Last component %s is a symlink. Denying"
1110                         "access.\n",
1111                         priv_paths->file_name.base_name));
1112                 status = NT_STATUS_ACCESS_DENIED;
1113                 goto err;
1114         }
1115
1116         smbreq->priv_paths = priv_paths;
1117         status = NT_STATUS_OK;
1118
1119   err:
1120
1121         if (saved_dir) {
1122                 vfs_ChDir(conn, saved_dir);
1123         }
1124         SAFE_FREE(resolved_name);
1125         if (!NT_STATUS_IS_OK(status)) {
1126                 TALLOC_FREE(priv_paths);
1127         }
1128         TALLOC_FREE(dir_name);
1129         return status;
1130 }
1131
1132 /*******************************************************************
1133  Reduce a file name, removing .. elements and checking that
1134  it is below dir in the heirachy. This uses realpath.
1135 ********************************************************************/
1136
1137 NTSTATUS check_reduced_name(connection_struct *conn, const char *fname)
1138 {
1139         char *resolved_name = NULL;
1140         bool allow_symlinks = true;
1141         bool allow_widelinks = false;
1142
1143         DBG_DEBUG("check_reduced_name [%s] [%s]\n", fname, conn->connectpath);
1144
1145         resolved_name = SMB_VFS_REALPATH(conn,fname);
1146
1147         if (!resolved_name) {
1148                 switch (errno) {
1149                         case ENOTDIR:
1150                                 DEBUG(3,("check_reduced_name: Component not a "
1151                                          "directory in getting realpath for "
1152                                          "%s\n", fname));
1153                                 return NT_STATUS_OBJECT_PATH_NOT_FOUND;
1154                         case ENOENT:
1155                         {
1156                                 TALLOC_CTX *ctx = talloc_tos();
1157                                 char *dir_name = NULL;
1158                                 const char *last_component = NULL;
1159                                 char *new_name = NULL;
1160                                 int ret;
1161
1162                                 /* Last component didn't exist.
1163                                    Remove it and try and canonicalise
1164                                    the directory name. */
1165                                 if (!parent_dirname(ctx, fname,
1166                                                 &dir_name,
1167                                                 &last_component)) {
1168                                         return NT_STATUS_NO_MEMORY;
1169                                 }
1170
1171                                 resolved_name = SMB_VFS_REALPATH(conn,dir_name);
1172                                 if (!resolved_name) {
1173                                         NTSTATUS status = map_nt_error_from_unix(errno);
1174
1175                                         if (errno == ENOENT || errno == ENOTDIR) {
1176                                                 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
1177                                         }
1178
1179                                         DEBUG(3,("check_reduce_name: "
1180                                                  "couldn't get realpath for "
1181                                                  "%s (%s)\n",
1182                                                 fname,
1183                                                 nt_errstr(status)));
1184                                         return status;
1185                                 }
1186                                 ret = asprintf(&new_name, "%s/%s",
1187                                                resolved_name, last_component);
1188                                 SAFE_FREE(resolved_name);
1189                                 if (ret == -1) {
1190                                         return NT_STATUS_NO_MEMORY;
1191                                 }
1192                                 resolved_name = new_name;
1193                                 break;
1194                         }
1195                         default:
1196                                 DEBUG(3,("check_reduced_name: couldn't get "
1197                                          "realpath for %s\n", fname));
1198                                 return map_nt_error_from_unix(errno);
1199                 }
1200         }
1201
1202         DEBUG(10,("check_reduced_name realpath [%s] -> [%s]\n", fname,
1203                   resolved_name));
1204
1205         if (*resolved_name != '/') {
1206                 DEBUG(0,("check_reduced_name: realpath doesn't return "
1207                          "absolute paths !\n"));
1208                 SAFE_FREE(resolved_name);
1209                 return NT_STATUS_OBJECT_NAME_INVALID;
1210         }
1211
1212         allow_widelinks = lp_widelinks(SNUM(conn));
1213         allow_symlinks = lp_follow_symlinks(SNUM(conn));
1214
1215         /* Common widelinks and symlinks checks. */
1216         if (!allow_widelinks || !allow_symlinks) {
1217                 const char *conn_rootdir;
1218                 size_t rootdir_len;
1219
1220                 conn_rootdir = SMB_VFS_CONNECTPATH(conn, fname);
1221                 if (conn_rootdir == NULL) {
1222                         DEBUG(2, ("check_reduced_name: Could not get "
1223                                 "conn_rootdir\n"));
1224                         SAFE_FREE(resolved_name);
1225                         return NT_STATUS_ACCESS_DENIED;
1226                 }
1227
1228                 rootdir_len = strlen(conn_rootdir);
1229                 if (strncmp(conn_rootdir, resolved_name,
1230                                 rootdir_len) != 0) {
1231                         DEBUG(2, ("check_reduced_name: Bad access "
1232                                 "attempt: %s is a symlink outside the "
1233                                 "share path\n", fname));
1234                         DEBUGADD(2, ("conn_rootdir =%s\n", conn_rootdir));
1235                         DEBUGADD(2, ("resolved_name=%s\n", resolved_name));
1236                         SAFE_FREE(resolved_name);
1237                         return NT_STATUS_ACCESS_DENIED;
1238                 }
1239
1240                 /* Extra checks if all symlinks are disallowed. */
1241                 if (!allow_symlinks) {
1242                         /* fname can't have changed in resolved_path. */
1243                         const char *p = &resolved_name[rootdir_len];
1244
1245                         /* *p can be '\0' if fname was "." */
1246                         if (*p == '\0' && ISDOT(fname)) {
1247                                 goto out;
1248                         }
1249
1250                         if (*p != '/') {
1251                                 DEBUG(2, ("check_reduced_name: logic error (%c) "
1252                                         "in resolved_name: %s\n",
1253                                         *p,
1254                                         fname));
1255                                 SAFE_FREE(resolved_name);
1256                                 return NT_STATUS_ACCESS_DENIED;
1257                         }
1258
1259                         p++;
1260                         if (strcmp(fname, p)!=0) {
1261                                 DEBUG(2, ("check_reduced_name: Bad access "
1262                                         "attempt: %s is a symlink to %s\n",
1263                                           fname, p));
1264                                 SAFE_FREE(resolved_name);
1265                                 return NT_STATUS_ACCESS_DENIED;
1266                         }
1267                 }
1268         }
1269
1270   out:
1271
1272         DEBUG(3,("check_reduced_name: %s reduced to %s\n", fname,
1273                  resolved_name));
1274         SAFE_FREE(resolved_name);
1275         return NT_STATUS_OK;
1276 }
1277
1278 /**
1279  * XXX: This is temporary and there should be no callers of this once
1280  * smb_filename is plumbed through all path based operations.
1281  *
1282  * Called when we know stream name parsing has already been done.
1283  */
1284 int vfs_stat_smb_basename(struct connection_struct *conn, const char *fname,
1285                        SMB_STRUCT_STAT *psbuf)
1286 {
1287         struct smb_filename smb_fname = {
1288                         .base_name = discard_const_p(char, fname)
1289         };
1290         int ret;
1291
1292         if (lp_posix_pathnames()) {
1293                 ret = SMB_VFS_LSTAT(conn, &smb_fname);
1294         } else {
1295                 ret = SMB_VFS_STAT(conn, &smb_fname);
1296         }
1297
1298         if (ret != -1) {
1299                 *psbuf = smb_fname.st;
1300         }
1301         return ret;
1302 }
1303
1304 /**
1305  * Ensure LSTAT is called for POSIX paths.
1306  */
1307
1308 NTSTATUS vfs_stat_fsp(files_struct *fsp)
1309 {
1310         int ret;
1311
1312         if(fsp->fh->fd == -1) {
1313                 if (fsp->posix_open) {
1314                         ret = SMB_VFS_LSTAT(fsp->conn, fsp->fsp_name);
1315                 } else {
1316                         ret = SMB_VFS_STAT(fsp->conn, fsp->fsp_name);
1317                 }
1318                 if (ret == -1) {
1319                         return map_nt_error_from_unix(errno);
1320                 }
1321         } else {
1322                 if(SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st) != 0) {
1323                         return map_nt_error_from_unix(errno);
1324                 }
1325         }
1326         return NT_STATUS_OK;
1327 }
1328
1329 /**
1330  * Initialize num_streams and streams, then call VFS op streaminfo
1331  */
1332 NTSTATUS vfs_streaminfo(connection_struct *conn,
1333                         struct files_struct *fsp,
1334                         const char *fname,
1335                         TALLOC_CTX *mem_ctx,
1336                         unsigned int *num_streams,
1337                         struct stream_struct **streams)
1338 {
1339         *num_streams = 0;
1340         *streams = NULL;
1341         return SMB_VFS_STREAMINFO(conn, fsp, fname, mem_ctx, num_streams, streams);
1342 }
1343
1344 /*
1345   generate a file_id from a stat structure
1346  */
1347 struct file_id vfs_file_id_from_sbuf(connection_struct *conn, const SMB_STRUCT_STAT *sbuf)
1348 {
1349         return SMB_VFS_FILE_ID_CREATE(conn, sbuf);
1350 }
1351
1352 int smb_vfs_call_connect(struct vfs_handle_struct *handle,
1353                          const char *service, const char *user)
1354 {
1355         VFS_FIND(connect);
1356         return handle->fns->connect_fn(handle, service, user);
1357 }
1358
1359 void smb_vfs_call_disconnect(struct vfs_handle_struct *handle)
1360 {
1361         VFS_FIND(disconnect);
1362         handle->fns->disconnect_fn(handle);
1363 }
1364
1365 uint64_t smb_vfs_call_disk_free(struct vfs_handle_struct *handle,
1366                                 const char *path, uint64_t *bsize,
1367                                 uint64_t *dfree, uint64_t *dsize)
1368 {
1369         VFS_FIND(disk_free);
1370         return handle->fns->disk_free_fn(handle, path, bsize, dfree, dsize);
1371 }
1372
1373 int smb_vfs_call_get_quota(struct vfs_handle_struct *handle,
1374                            enum SMB_QUOTA_TYPE qtype, unid_t id,
1375                            SMB_DISK_QUOTA *qt)
1376 {
1377         VFS_FIND(get_quota);
1378         return handle->fns->get_quota_fn(handle, qtype, id, qt);
1379 }
1380
1381 int smb_vfs_call_set_quota(struct vfs_handle_struct *handle,
1382                            enum SMB_QUOTA_TYPE qtype, unid_t id,
1383                            SMB_DISK_QUOTA *qt)
1384 {
1385         VFS_FIND(set_quota);
1386         return handle->fns->set_quota_fn(handle, qtype, id, qt);
1387 }
1388
1389 int smb_vfs_call_get_shadow_copy_data(struct vfs_handle_struct *handle,
1390                                       struct files_struct *fsp,
1391                                       struct shadow_copy_data *shadow_copy_data,
1392                                       bool labels)
1393 {
1394         VFS_FIND(get_shadow_copy_data);
1395         return handle->fns->get_shadow_copy_data_fn(handle, fsp,
1396                                                     shadow_copy_data,
1397                                                     labels);
1398 }
1399 int smb_vfs_call_statvfs(struct vfs_handle_struct *handle, const char *path,
1400                          struct vfs_statvfs_struct *statbuf)
1401 {
1402         VFS_FIND(statvfs);
1403         return handle->fns->statvfs_fn(handle, path, statbuf);
1404 }
1405
1406 uint32_t smb_vfs_call_fs_capabilities(struct vfs_handle_struct *handle,
1407                         enum timestamp_set_resolution *p_ts_res)
1408 {
1409         VFS_FIND(fs_capabilities);
1410         return handle->fns->fs_capabilities_fn(handle, p_ts_res);
1411 }
1412
1413 NTSTATUS smb_vfs_call_get_dfs_referrals(struct vfs_handle_struct *handle,
1414                                         struct dfs_GetDFSReferral *r)
1415 {
1416         VFS_FIND(get_dfs_referrals);
1417         return handle->fns->get_dfs_referrals_fn(handle, r);
1418 }
1419
1420 DIR *smb_vfs_call_opendir(struct vfs_handle_struct *handle,
1421                                      const char *fname, const char *mask,
1422                                      uint32_t attributes)
1423 {
1424         VFS_FIND(opendir);
1425         return handle->fns->opendir_fn(handle, fname, mask, attributes);
1426 }
1427
1428 DIR *smb_vfs_call_fdopendir(struct vfs_handle_struct *handle,
1429                                         struct files_struct *fsp,
1430                                         const char *mask,
1431                                         uint32_t attributes)
1432 {
1433         VFS_FIND(fdopendir);
1434         return handle->fns->fdopendir_fn(handle, fsp, mask, attributes);
1435 }
1436
1437 struct dirent *smb_vfs_call_readdir(struct vfs_handle_struct *handle,
1438                                               DIR *dirp,
1439                                               SMB_STRUCT_STAT *sbuf)
1440 {
1441         VFS_FIND(readdir);
1442         return handle->fns->readdir_fn(handle, dirp, sbuf);
1443 }
1444
1445 void smb_vfs_call_seekdir(struct vfs_handle_struct *handle,
1446                           DIR *dirp, long offset)
1447 {
1448         VFS_FIND(seekdir);
1449         handle->fns->seekdir_fn(handle, dirp, offset);
1450 }
1451
1452 long smb_vfs_call_telldir(struct vfs_handle_struct *handle,
1453                           DIR *dirp)
1454 {
1455         VFS_FIND(telldir);
1456         return handle->fns->telldir_fn(handle, dirp);
1457 }
1458
1459 void smb_vfs_call_rewind_dir(struct vfs_handle_struct *handle,
1460                              DIR *dirp)
1461 {
1462         VFS_FIND(rewind_dir);
1463         handle->fns->rewind_dir_fn(handle, dirp);
1464 }
1465
1466 int smb_vfs_call_mkdir(struct vfs_handle_struct *handle, const char *path,
1467                        mode_t mode)
1468 {
1469         VFS_FIND(mkdir);
1470         return handle->fns->mkdir_fn(handle, path, mode);
1471 }
1472
1473 int smb_vfs_call_rmdir(struct vfs_handle_struct *handle, const char *path)
1474 {
1475         VFS_FIND(rmdir);
1476         return handle->fns->rmdir_fn(handle, path);
1477 }
1478
1479 int smb_vfs_call_closedir(struct vfs_handle_struct *handle,
1480                           DIR *dir)
1481 {
1482         VFS_FIND(closedir);
1483         return handle->fns->closedir_fn(handle, dir);
1484 }
1485
1486 void smb_vfs_call_init_search_op(struct vfs_handle_struct *handle,
1487                                  DIR *dirp)
1488 {
1489         VFS_FIND(init_search_op);
1490         handle->fns->init_search_op_fn(handle, dirp);
1491 }
1492
1493 int smb_vfs_call_open(struct vfs_handle_struct *handle,
1494                       struct smb_filename *smb_fname, struct files_struct *fsp,
1495                       int flags, mode_t mode)
1496 {
1497         VFS_FIND(open);
1498         return handle->fns->open_fn(handle, smb_fname, fsp, flags, mode);
1499 }
1500
1501 NTSTATUS smb_vfs_call_create_file(struct vfs_handle_struct *handle,
1502                                   struct smb_request *req,
1503                                   uint16_t root_dir_fid,
1504                                   struct smb_filename *smb_fname,
1505                                   uint32_t access_mask,
1506                                   uint32_t share_access,
1507                                   uint32_t create_disposition,
1508                                   uint32_t create_options,
1509                                   uint32_t file_attributes,
1510                                   uint32_t oplock_request,
1511                                   struct smb2_lease *lease,
1512                                   uint64_t allocation_size,
1513                                   uint32_t private_flags,
1514                                   struct security_descriptor *sd,
1515                                   struct ea_list *ea_list,
1516                                   files_struct **result,
1517                                   int *pinfo,
1518                                   const struct smb2_create_blobs *in_context_blobs,
1519                                   struct smb2_create_blobs *out_context_blobs)
1520 {
1521         VFS_FIND(create_file);
1522         return handle->fns->create_file_fn(
1523                 handle, req, root_dir_fid, smb_fname, access_mask,
1524                 share_access, create_disposition, create_options,
1525                 file_attributes, oplock_request, lease, allocation_size,
1526                 private_flags, sd, ea_list,
1527                 result, pinfo, in_context_blobs, out_context_blobs);
1528 }
1529
1530 int smb_vfs_call_close(struct vfs_handle_struct *handle,
1531                        struct files_struct *fsp)
1532 {
1533         VFS_FIND(close);
1534         return handle->fns->close_fn(handle, fsp);
1535 }
1536
1537 ssize_t smb_vfs_call_read(struct vfs_handle_struct *handle,
1538                           struct files_struct *fsp, void *data, size_t n)
1539 {
1540         VFS_FIND(read);
1541         return handle->fns->read_fn(handle, fsp, data, n);
1542 }
1543
1544 ssize_t smb_vfs_call_pread(struct vfs_handle_struct *handle,
1545                            struct files_struct *fsp, void *data, size_t n,
1546                            off_t offset)
1547 {
1548         VFS_FIND(pread);
1549         return handle->fns->pread_fn(handle, fsp, data, n, offset);
1550 }
1551
1552 struct smb_vfs_call_pread_state {
1553         ssize_t (*recv_fn)(struct tevent_req *req, int *err);
1554         ssize_t retval;
1555 };
1556
1557 static void smb_vfs_call_pread_done(struct tevent_req *subreq);
1558
1559 struct tevent_req *smb_vfs_call_pread_send(struct vfs_handle_struct *handle,
1560                                            TALLOC_CTX *mem_ctx,
1561                                            struct tevent_context *ev,
1562                                            struct files_struct *fsp,
1563                                            void *data,
1564                                            size_t n, off_t offset)
1565 {
1566         struct tevent_req *req, *subreq;
1567         struct smb_vfs_call_pread_state *state;
1568
1569         req = tevent_req_create(mem_ctx, &state,
1570                                 struct smb_vfs_call_pread_state);
1571         if (req == NULL) {
1572                 return NULL;
1573         }
1574         VFS_FIND(pread_send);
1575         state->recv_fn = handle->fns->pread_recv_fn;
1576
1577         subreq = handle->fns->pread_send_fn(handle, state, ev, fsp, data, n,
1578                                             offset);
1579         if (tevent_req_nomem(subreq, req)) {
1580                 return tevent_req_post(req, ev);
1581         }
1582         tevent_req_set_callback(subreq, smb_vfs_call_pread_done, req);
1583         return req;
1584 }
1585
1586 static void smb_vfs_call_pread_done(struct tevent_req *subreq)
1587 {
1588         struct tevent_req *req = tevent_req_callback_data(
1589                 subreq, struct tevent_req);
1590         struct smb_vfs_call_pread_state *state = tevent_req_data(
1591                 req, struct smb_vfs_call_pread_state);
1592         int err;
1593
1594         state->retval = state->recv_fn(subreq, &err);
1595         TALLOC_FREE(subreq);
1596         if (state->retval == -1) {
1597                 tevent_req_error(req, err);
1598                 return;
1599         }
1600         tevent_req_done(req);
1601 }
1602
1603 ssize_t SMB_VFS_PREAD_RECV(struct tevent_req *req, int *perrno)
1604 {
1605         struct smb_vfs_call_pread_state *state = tevent_req_data(
1606                 req, struct smb_vfs_call_pread_state);
1607         int err;
1608
1609         if (tevent_req_is_unix_error(req, &err)) {
1610                 *perrno = err;
1611                 return -1;
1612         }
1613         return state->retval;
1614 }
1615
1616 ssize_t smb_vfs_call_write(struct vfs_handle_struct *handle,
1617                            struct files_struct *fsp, const void *data,
1618                            size_t n)
1619 {
1620         VFS_FIND(write);
1621         return handle->fns->write_fn(handle, fsp, data, n);
1622 }
1623
1624 ssize_t smb_vfs_call_pwrite(struct vfs_handle_struct *handle,
1625                             struct files_struct *fsp, const void *data,
1626                             size_t n, off_t offset)
1627 {
1628         VFS_FIND(pwrite);
1629         return handle->fns->pwrite_fn(handle, fsp, data, n, offset);
1630 }
1631
1632 struct smb_vfs_call_pwrite_state {
1633         ssize_t (*recv_fn)(struct tevent_req *req, int *err);
1634         ssize_t retval;
1635 };
1636
1637 static void smb_vfs_call_pwrite_done(struct tevent_req *subreq);
1638
1639 struct tevent_req *smb_vfs_call_pwrite_send(struct vfs_handle_struct *handle,
1640                                             TALLOC_CTX *mem_ctx,
1641                                             struct tevent_context *ev,
1642                                             struct files_struct *fsp,
1643                                             const void *data,
1644                                             size_t n, off_t offset)
1645 {
1646         struct tevent_req *req, *subreq;
1647         struct smb_vfs_call_pwrite_state *state;
1648
1649         req = tevent_req_create(mem_ctx, &state,
1650                                 struct smb_vfs_call_pwrite_state);
1651         if (req == NULL) {
1652                 return NULL;
1653         }
1654         VFS_FIND(pwrite_send);
1655         state->recv_fn = handle->fns->pwrite_recv_fn;
1656
1657         subreq = handle->fns->pwrite_send_fn(handle, state, ev, fsp, data, n,
1658                                              offset);
1659         if (tevent_req_nomem(subreq, req)) {
1660                 return tevent_req_post(req, ev);
1661         }
1662         tevent_req_set_callback(subreq, smb_vfs_call_pwrite_done, req);
1663         return req;
1664 }
1665
1666 static void smb_vfs_call_pwrite_done(struct tevent_req *subreq)
1667 {
1668         struct tevent_req *req = tevent_req_callback_data(
1669                 subreq, struct tevent_req);
1670         struct smb_vfs_call_pwrite_state *state = tevent_req_data(
1671                 req, struct smb_vfs_call_pwrite_state);
1672         int err;
1673
1674         state->retval = state->recv_fn(subreq, &err);
1675         TALLOC_FREE(subreq);
1676         if (state->retval == -1) {
1677                 tevent_req_error(req, err);
1678                 return;
1679         }
1680         tevent_req_done(req);
1681 }
1682
1683 ssize_t SMB_VFS_PWRITE_RECV(struct tevent_req *req, int *perrno)
1684 {
1685         struct smb_vfs_call_pwrite_state *state = tevent_req_data(
1686                 req, struct smb_vfs_call_pwrite_state);
1687         int err;
1688
1689         if (tevent_req_is_unix_error(req, &err)) {
1690                 *perrno = err;
1691                 return -1;
1692         }
1693         return state->retval;
1694 }
1695
1696 off_t smb_vfs_call_lseek(struct vfs_handle_struct *handle,
1697                              struct files_struct *fsp, off_t offset,
1698                              int whence)
1699 {
1700         VFS_FIND(lseek);
1701         return handle->fns->lseek_fn(handle, fsp, offset, whence);
1702 }
1703
1704 ssize_t smb_vfs_call_sendfile(struct vfs_handle_struct *handle, int tofd,
1705                               files_struct *fromfsp, const DATA_BLOB *header,
1706                               off_t offset, size_t count)
1707 {
1708         VFS_FIND(sendfile);
1709         return handle->fns->sendfile_fn(handle, tofd, fromfsp, header, offset,
1710                                         count);
1711 }
1712
1713 ssize_t smb_vfs_call_recvfile(struct vfs_handle_struct *handle, int fromfd,
1714                               files_struct *tofsp, off_t offset,
1715                               size_t count)
1716 {
1717         VFS_FIND(recvfile);
1718         return handle->fns->recvfile_fn(handle, fromfd, tofsp, offset, count);
1719 }
1720
1721 int smb_vfs_call_rename(struct vfs_handle_struct *handle,
1722                         const struct smb_filename *smb_fname_src,
1723                         const struct smb_filename *smb_fname_dst)
1724 {
1725         VFS_FIND(rename);
1726         return handle->fns->rename_fn(handle, smb_fname_src, smb_fname_dst);
1727 }
1728
1729 int smb_vfs_call_fsync(struct vfs_handle_struct *handle,
1730                        struct files_struct *fsp)
1731 {
1732         VFS_FIND(fsync);
1733         return handle->fns->fsync_fn(handle, fsp);
1734 }
1735
1736 struct smb_vfs_call_fsync_state {
1737         int (*recv_fn)(struct tevent_req *req, int *err);
1738         int retval;
1739 };
1740
1741 static void smb_vfs_call_fsync_done(struct tevent_req *subreq);
1742
1743 struct tevent_req *smb_vfs_call_fsync_send(struct vfs_handle_struct *handle,
1744                                            TALLOC_CTX *mem_ctx,
1745                                            struct tevent_context *ev,
1746                                            struct files_struct *fsp)
1747 {
1748         struct tevent_req *req, *subreq;
1749         struct smb_vfs_call_fsync_state *state;
1750
1751         req = tevent_req_create(mem_ctx, &state,
1752                                 struct smb_vfs_call_fsync_state);
1753         if (req == NULL) {
1754                 return NULL;
1755         }
1756         VFS_FIND(fsync_send);
1757         state->recv_fn = handle->fns->fsync_recv_fn;
1758
1759         subreq = handle->fns->fsync_send_fn(handle, state, ev, fsp);
1760         if (tevent_req_nomem(subreq, req)) {
1761                 return tevent_req_post(req, ev);
1762         }
1763         tevent_req_set_callback(subreq, smb_vfs_call_fsync_done, req);
1764         return req;
1765 }
1766
1767 static void smb_vfs_call_fsync_done(struct tevent_req *subreq)
1768 {
1769         struct tevent_req *req = tevent_req_callback_data(
1770                 subreq, struct tevent_req);
1771         struct smb_vfs_call_fsync_state *state = tevent_req_data(
1772                 req, struct smb_vfs_call_fsync_state);
1773         int err;
1774
1775         state->retval = state->recv_fn(subreq, &err);
1776         TALLOC_FREE(subreq);
1777         if (state->retval == -1) {
1778                 tevent_req_error(req, err);
1779                 return;
1780         }
1781         tevent_req_done(req);
1782 }
1783
1784 int SMB_VFS_FSYNC_RECV(struct tevent_req *req, int *perrno)
1785 {
1786         struct smb_vfs_call_fsync_state *state = tevent_req_data(
1787                 req, struct smb_vfs_call_fsync_state);
1788         int err;
1789
1790         if (tevent_req_is_unix_error(req, &err)) {
1791                 *perrno = err;
1792                 return -1;
1793         }
1794         return state->retval;
1795 }
1796
1797
1798 int smb_vfs_call_stat(struct vfs_handle_struct *handle,
1799                       struct smb_filename *smb_fname)
1800 {
1801         VFS_FIND(stat);
1802         return handle->fns->stat_fn(handle, smb_fname);
1803 }
1804
1805 int smb_vfs_call_fstat(struct vfs_handle_struct *handle,
1806                        struct files_struct *fsp, SMB_STRUCT_STAT *sbuf)
1807 {
1808         VFS_FIND(fstat);
1809         return handle->fns->fstat_fn(handle, fsp, sbuf);
1810 }
1811
1812 int smb_vfs_call_lstat(struct vfs_handle_struct *handle,
1813                        struct smb_filename *smb_filename)
1814 {
1815         VFS_FIND(lstat);
1816         return handle->fns->lstat_fn(handle, smb_filename);
1817 }
1818
1819 uint64_t smb_vfs_call_get_alloc_size(struct vfs_handle_struct *handle,
1820                                      struct files_struct *fsp,
1821                                      const SMB_STRUCT_STAT *sbuf)
1822 {
1823         VFS_FIND(get_alloc_size);
1824         return handle->fns->get_alloc_size_fn(handle, fsp, sbuf);
1825 }
1826
1827 int smb_vfs_call_unlink(struct vfs_handle_struct *handle,
1828                         const struct smb_filename *smb_fname)
1829 {
1830         VFS_FIND(unlink);
1831         return handle->fns->unlink_fn(handle, smb_fname);
1832 }
1833
1834 int smb_vfs_call_chmod(struct vfs_handle_struct *handle, const char *path,
1835                        mode_t mode)
1836 {
1837         VFS_FIND(chmod);
1838         return handle->fns->chmod_fn(handle, path, mode);
1839 }
1840
1841 int smb_vfs_call_fchmod(struct vfs_handle_struct *handle,
1842                         struct files_struct *fsp, mode_t mode)
1843 {
1844         VFS_FIND(fchmod);
1845         return handle->fns->fchmod_fn(handle, fsp, mode);
1846 }
1847
1848 int smb_vfs_call_chown(struct vfs_handle_struct *handle, const char *path,
1849                        uid_t uid, gid_t gid)
1850 {
1851         VFS_FIND(chown);
1852         return handle->fns->chown_fn(handle, path, uid, gid);
1853 }
1854
1855 int smb_vfs_call_fchown(struct vfs_handle_struct *handle,
1856                         struct files_struct *fsp, uid_t uid, gid_t gid)
1857 {
1858         VFS_FIND(fchown);
1859         return handle->fns->fchown_fn(handle, fsp, uid, gid);
1860 }
1861
1862 int smb_vfs_call_lchown(struct vfs_handle_struct *handle, const char *path,
1863                         uid_t uid, gid_t gid)
1864 {
1865         VFS_FIND(lchown);
1866         return handle->fns->lchown_fn(handle, path, uid, gid);
1867 }
1868
1869 NTSTATUS vfs_chown_fsp(files_struct *fsp, uid_t uid, gid_t gid)
1870 {
1871         int ret;
1872         bool as_root = false;
1873         const char *path;
1874         char *saved_dir = NULL;
1875         char *parent_dir = NULL;
1876         NTSTATUS status;
1877
1878         if (fsp->fh->fd != -1) {
1879                 /* Try fchown. */
1880                 ret = SMB_VFS_FCHOWN(fsp, uid, gid);
1881                 if (ret == 0) {
1882                         return NT_STATUS_OK;
1883                 }
1884                 if (ret == -1 && errno != ENOSYS) {
1885                         return map_nt_error_from_unix(errno);
1886                 }
1887         }
1888
1889         as_root = (geteuid() == 0);
1890
1891         if (as_root) {
1892                 /*
1893                  * We are being asked to chown as root. Make
1894                  * sure we chdir() into the path to pin it,
1895                  * and always act using lchown to ensure we
1896                  * don't deref any symbolic links.
1897                  */
1898                 const char *final_component = NULL;
1899                 struct smb_filename local_fname;
1900
1901                 saved_dir = vfs_GetWd(talloc_tos(),fsp->conn);
1902                 if (!saved_dir) {
1903                         status = map_nt_error_from_unix(errno);
1904                         DEBUG(0,("vfs_chown_fsp: failed to get "
1905                                 "current working directory. Error was %s\n",
1906                                 strerror(errno)));
1907                         return status;
1908                 }
1909
1910                 if (!parent_dirname(talloc_tos(),
1911                                 fsp->fsp_name->base_name,
1912                                 &parent_dir,
1913                                 &final_component)) {
1914                         return NT_STATUS_NO_MEMORY;
1915                 }
1916
1917                 /* cd into the parent dir to pin it. */
1918                 ret = vfs_ChDir(fsp->conn, parent_dir);
1919                 if (ret == -1) {
1920                         return map_nt_error_from_unix(errno);
1921                 }
1922
1923                 ZERO_STRUCT(local_fname);
1924                 local_fname.base_name = discard_const_p(char, final_component);
1925
1926                 /* Must use lstat here. */
1927                 ret = SMB_VFS_LSTAT(fsp->conn, &local_fname);
1928                 if (ret == -1) {
1929                         status = map_nt_error_from_unix(errno);
1930                         goto out;
1931                 }
1932
1933                 /* Ensure it matches the fsp stat. */
1934                 if (!check_same_stat(&local_fname.st, &fsp->fsp_name->st)) {
1935                         status = NT_STATUS_ACCESS_DENIED;
1936                         goto out;
1937                 }
1938                 path = final_component;
1939         } else {
1940                 path = fsp->fsp_name->base_name;
1941         }
1942
1943         if (fsp->posix_open || as_root) {
1944                 ret = SMB_VFS_LCHOWN(fsp->conn,
1945                         path,
1946                         uid, gid);
1947         } else {
1948                 ret = SMB_VFS_CHOWN(fsp->conn,
1949                         path,
1950                         uid, gid);
1951         }
1952
1953         if (ret == 0) {
1954                 status = NT_STATUS_OK;
1955         } else {
1956                 status = map_nt_error_from_unix(errno);
1957         }
1958
1959   out:
1960
1961         if (as_root) {
1962                 vfs_ChDir(fsp->conn,saved_dir);
1963                 TALLOC_FREE(saved_dir);
1964                 TALLOC_FREE(parent_dir);
1965         }
1966         return status;
1967 }
1968
1969 int smb_vfs_call_chdir(struct vfs_handle_struct *handle, const char *path)
1970 {
1971         VFS_FIND(chdir);
1972         return handle->fns->chdir_fn(handle, path);
1973 }
1974
1975 char *smb_vfs_call_getwd(struct vfs_handle_struct *handle)
1976 {
1977         VFS_FIND(getwd);
1978         return handle->fns->getwd_fn(handle);
1979 }
1980
1981 int smb_vfs_call_ntimes(struct vfs_handle_struct *handle,
1982                         const struct smb_filename *smb_fname,
1983                         struct smb_file_time *ft)
1984 {
1985         VFS_FIND(ntimes);
1986         return handle->fns->ntimes_fn(handle, smb_fname, ft);
1987 }
1988
1989 int smb_vfs_call_ftruncate(struct vfs_handle_struct *handle,
1990                            struct files_struct *fsp, off_t offset)
1991 {
1992         VFS_FIND(ftruncate);
1993         return handle->fns->ftruncate_fn(handle, fsp, offset);
1994 }
1995
1996 int smb_vfs_call_fallocate(struct vfs_handle_struct *handle,
1997                            struct files_struct *fsp,
1998                            uint32_t mode,
1999                            off_t offset,
2000                            off_t len)
2001 {
2002         VFS_FIND(fallocate);
2003         return handle->fns->fallocate_fn(handle, fsp, mode, offset, len);
2004 }
2005
2006 int smb_vfs_call_kernel_flock(struct vfs_handle_struct *handle,
2007                               struct files_struct *fsp, uint32_t share_mode,
2008                               uint32_t access_mask)
2009 {
2010         VFS_FIND(kernel_flock);
2011         return handle->fns->kernel_flock_fn(handle, fsp, share_mode,
2012                                          access_mask);
2013 }
2014
2015 int smb_vfs_call_linux_setlease(struct vfs_handle_struct *handle,
2016                                 struct files_struct *fsp, int leasetype)
2017 {
2018         VFS_FIND(linux_setlease);
2019         return handle->fns->linux_setlease_fn(handle, fsp, leasetype);
2020 }
2021
2022 int smb_vfs_call_symlink(struct vfs_handle_struct *handle, const char *oldpath,
2023                          const char *newpath)
2024 {
2025         VFS_FIND(symlink);
2026         return handle->fns->symlink_fn(handle, oldpath, newpath);
2027 }
2028
2029 int smb_vfs_call_readlink(struct vfs_handle_struct *handle,
2030                               const char *path, char *buf, size_t bufsiz)
2031 {
2032         VFS_FIND(readlink);
2033         return handle->fns->readlink_fn(handle, path, buf, bufsiz);
2034 }
2035
2036 int smb_vfs_call_link(struct vfs_handle_struct *handle, const char *oldpath,
2037                       const char *newpath)
2038 {
2039         VFS_FIND(link);
2040         return handle->fns->link_fn(handle, oldpath, newpath);
2041 }
2042
2043 int smb_vfs_call_mknod(struct vfs_handle_struct *handle, const char *path,
2044                        mode_t mode, SMB_DEV_T dev)
2045 {
2046         VFS_FIND(mknod);
2047         return handle->fns->mknod_fn(handle, path, mode, dev);
2048 }
2049
2050 char *smb_vfs_call_realpath(struct vfs_handle_struct *handle, const char *path)
2051 {
2052         VFS_FIND(realpath);
2053         return handle->fns->realpath_fn(handle, path);
2054 }
2055
2056 int smb_vfs_call_chflags(struct vfs_handle_struct *handle, const char *path,
2057                          unsigned int flags)
2058 {
2059         VFS_FIND(chflags);
2060         return handle->fns->chflags_fn(handle, path, flags);
2061 }
2062
2063 struct file_id smb_vfs_call_file_id_create(struct vfs_handle_struct *handle,
2064                                            const SMB_STRUCT_STAT *sbuf)
2065 {
2066         VFS_FIND(file_id_create);
2067         return handle->fns->file_id_create_fn(handle, sbuf);
2068 }
2069
2070 NTSTATUS smb_vfs_call_streaminfo(struct vfs_handle_struct *handle,
2071                                  struct files_struct *fsp,
2072                                  const char *fname,
2073                                  TALLOC_CTX *mem_ctx,
2074                                  unsigned int *num_streams,
2075                                  struct stream_struct **streams)
2076 {
2077         VFS_FIND(streaminfo);
2078         return handle->fns->streaminfo_fn(handle, fsp, fname, mem_ctx,
2079                                           num_streams, streams);
2080 }
2081
2082 int smb_vfs_call_get_real_filename(struct vfs_handle_struct *handle,
2083                                    const char *path, const char *name,
2084                                    TALLOC_CTX *mem_ctx, char **found_name)
2085 {
2086         VFS_FIND(get_real_filename);
2087         return handle->fns->get_real_filename_fn(handle, path, name, mem_ctx,
2088                                                  found_name);
2089 }
2090
2091 const char *smb_vfs_call_connectpath(struct vfs_handle_struct *handle,
2092                                      const char *filename)
2093 {
2094         VFS_FIND(connectpath);
2095         return handle->fns->connectpath_fn(handle, filename);
2096 }
2097
2098 bool smb_vfs_call_strict_lock(struct vfs_handle_struct *handle,
2099                               struct files_struct *fsp,
2100                               struct lock_struct *plock)
2101 {
2102         VFS_FIND(strict_lock);
2103         return handle->fns->strict_lock_fn(handle, fsp, plock);
2104 }
2105
2106 void smb_vfs_call_strict_unlock(struct vfs_handle_struct *handle,
2107                                 struct files_struct *fsp,
2108                                 struct lock_struct *plock)
2109 {
2110         VFS_FIND(strict_unlock);
2111         handle->fns->strict_unlock_fn(handle, fsp, plock);
2112 }
2113
2114 NTSTATUS smb_vfs_call_translate_name(struct vfs_handle_struct *handle,
2115                                      const char *name,
2116                                      enum vfs_translate_direction direction,
2117                                      TALLOC_CTX *mem_ctx,
2118                                      char **mapped_name)
2119 {
2120         VFS_FIND(translate_name);
2121         return handle->fns->translate_name_fn(handle, name, direction, mem_ctx,
2122                                               mapped_name);
2123 }
2124
2125 NTSTATUS smb_vfs_call_fsctl(struct vfs_handle_struct *handle,
2126                             struct files_struct *fsp,
2127                             TALLOC_CTX *ctx,
2128                             uint32_t function,
2129                             uint16_t req_flags,
2130                             const uint8_t *in_data,
2131                             uint32_t in_len,
2132                             uint8_t **out_data,
2133                             uint32_t max_out_len,
2134                             uint32_t *out_len)
2135 {
2136         VFS_FIND(fsctl);
2137         return handle->fns->fsctl_fn(handle, fsp, ctx, function, req_flags,
2138                                      in_data, in_len, out_data, max_out_len,
2139                                      out_len);
2140 }
2141
2142 struct tevent_req *smb_vfs_call_copy_chunk_send(struct vfs_handle_struct *handle,
2143                                                 TALLOC_CTX *mem_ctx,
2144                                                 struct tevent_context *ev,
2145                                                 struct files_struct *src_fsp,
2146                                                 off_t src_off,
2147                                                 struct files_struct *dest_fsp,
2148                                                 off_t dest_off,
2149                                                 off_t num)
2150 {
2151         VFS_FIND(copy_chunk_send);
2152         return handle->fns->copy_chunk_send_fn(handle, mem_ctx, ev, src_fsp,
2153                                                src_off, dest_fsp, dest_off, num);
2154 }
2155
2156 NTSTATUS smb_vfs_call_copy_chunk_recv(struct vfs_handle_struct *handle,
2157                                       struct tevent_req *req,
2158                                       off_t *copied)
2159 {
2160         VFS_FIND(copy_chunk_recv);
2161         return handle->fns->copy_chunk_recv_fn(handle, req, copied);
2162 }
2163
2164 NTSTATUS smb_vfs_call_get_compression(vfs_handle_struct *handle,
2165                                       TALLOC_CTX *mem_ctx,
2166                                       struct files_struct *fsp,
2167                                       struct smb_filename *smb_fname,
2168                                       uint16_t *_compression_fmt)
2169 {
2170         VFS_FIND(get_compression);
2171         return handle->fns->get_compression_fn(handle, mem_ctx, fsp, smb_fname,
2172                                                _compression_fmt);
2173 }
2174
2175 NTSTATUS smb_vfs_call_set_compression(vfs_handle_struct *handle,
2176                                       TALLOC_CTX *mem_ctx,
2177                                       struct files_struct *fsp,
2178                                       uint16_t compression_fmt)
2179 {
2180         VFS_FIND(set_compression);
2181         return handle->fns->set_compression_fn(handle, mem_ctx, fsp,
2182                                                compression_fmt);
2183 }
2184
2185 NTSTATUS smb_vfs_call_snap_check_path(vfs_handle_struct *handle,
2186                                       TALLOC_CTX *mem_ctx,
2187                                       const char *service_path,
2188                                       char **base_volume)
2189 {
2190         VFS_FIND(snap_check_path);
2191         return handle->fns->snap_check_path_fn(handle, mem_ctx, service_path,
2192                                                base_volume);
2193 }
2194
2195 NTSTATUS smb_vfs_call_snap_create(struct vfs_handle_struct *handle,
2196                                   TALLOC_CTX *mem_ctx,
2197                                   const char *base_volume,
2198                                   time_t *tstamp,
2199                                   bool rw,
2200                                   char **base_path,
2201                                   char **snap_path)
2202 {
2203         VFS_FIND(snap_create);
2204         return handle->fns->snap_create_fn(handle, mem_ctx, base_volume, tstamp,
2205                                            rw, base_path, snap_path);
2206 }
2207
2208 NTSTATUS smb_vfs_call_snap_delete(struct vfs_handle_struct *handle,
2209                                   TALLOC_CTX *mem_ctx,
2210                                   char *base_path,
2211                                   char *snap_path)
2212 {
2213         VFS_FIND(snap_delete);
2214         return handle->fns->snap_delete_fn(handle, mem_ctx, base_path,
2215                                            snap_path);
2216 }
2217
2218 NTSTATUS smb_vfs_call_fget_nt_acl(struct vfs_handle_struct *handle,
2219                                   struct files_struct *fsp,
2220                                   uint32_t security_info,
2221                                   TALLOC_CTX *mem_ctx,
2222                                   struct security_descriptor **ppdesc)
2223 {
2224         VFS_FIND(fget_nt_acl);
2225         return handle->fns->fget_nt_acl_fn(handle, fsp, security_info,
2226                                            mem_ctx, ppdesc);
2227 }
2228
2229 NTSTATUS smb_vfs_call_get_nt_acl(struct vfs_handle_struct *handle,
2230                                  const char *name,
2231                                  uint32_t security_info,
2232                                  TALLOC_CTX *mem_ctx,
2233                                  struct security_descriptor **ppdesc)
2234 {
2235         VFS_FIND(get_nt_acl);
2236         return handle->fns->get_nt_acl_fn(handle, name, security_info, mem_ctx, ppdesc);
2237 }
2238
2239 NTSTATUS smb_vfs_call_fset_nt_acl(struct vfs_handle_struct *handle,
2240                                   struct files_struct *fsp,
2241                                   uint32_t security_info_sent,
2242                                   const struct security_descriptor *psd)
2243 {
2244         VFS_FIND(fset_nt_acl);
2245         return handle->fns->fset_nt_acl_fn(handle, fsp, security_info_sent,
2246                                            psd);
2247 }
2248
2249 NTSTATUS smb_vfs_call_audit_file(struct vfs_handle_struct *handle,
2250                                  struct smb_filename *file,
2251                                  struct security_acl *sacl,
2252                                  uint32_t access_requested,
2253                                  uint32_t access_denied)
2254 {
2255         VFS_FIND(audit_file);
2256         return handle->fns->audit_file_fn(handle,
2257                                           file,
2258                                           sacl,
2259                                           access_requested,
2260                                           access_denied);
2261 }
2262
2263 int smb_vfs_call_chmod_acl(struct vfs_handle_struct *handle, const char *name,
2264                            mode_t mode)
2265 {
2266         VFS_FIND(chmod_acl);
2267         return handle->fns->chmod_acl_fn(handle, name, mode);
2268 }
2269
2270 int smb_vfs_call_fchmod_acl(struct vfs_handle_struct *handle,
2271                             struct files_struct *fsp, mode_t mode)
2272 {
2273         VFS_FIND(fchmod_acl);
2274         return handle->fns->fchmod_acl_fn(handle, fsp, mode);
2275 }
2276
2277 SMB_ACL_T smb_vfs_call_sys_acl_get_file(struct vfs_handle_struct *handle,
2278                                         const char *path_p,
2279                                         SMB_ACL_TYPE_T type,
2280                                         TALLOC_CTX *mem_ctx)
2281 {
2282         VFS_FIND(sys_acl_get_file);
2283         return handle->fns->sys_acl_get_file_fn(handle, path_p, type, mem_ctx);
2284 }
2285
2286 SMB_ACL_T smb_vfs_call_sys_acl_get_fd(struct vfs_handle_struct *handle,
2287                                       struct files_struct *fsp,
2288                                       TALLOC_CTX *mem_ctx)
2289 {
2290         VFS_FIND(sys_acl_get_fd);
2291         return handle->fns->sys_acl_get_fd_fn(handle, fsp, mem_ctx);
2292 }
2293
2294 int smb_vfs_call_sys_acl_blob_get_file(struct vfs_handle_struct *handle,
2295                                        const char *path_p,
2296                                        TALLOC_CTX *mem_ctx,
2297                                        char **blob_description,
2298                                        DATA_BLOB *blob)
2299 {
2300         VFS_FIND(sys_acl_blob_get_file);
2301         return handle->fns->sys_acl_blob_get_file_fn(handle, path_p, mem_ctx, blob_description, blob);
2302 }
2303
2304 int smb_vfs_call_sys_acl_blob_get_fd(struct vfs_handle_struct *handle,
2305                                      struct files_struct *fsp,
2306                                      TALLOC_CTX *mem_ctx,
2307                                      char **blob_description,
2308                                      DATA_BLOB *blob)
2309 {
2310         VFS_FIND(sys_acl_blob_get_fd);
2311         return handle->fns->sys_acl_blob_get_fd_fn(handle, fsp, mem_ctx, blob_description, blob);
2312 }
2313
2314 int smb_vfs_call_sys_acl_set_file(struct vfs_handle_struct *handle,
2315                                   const char *name, SMB_ACL_TYPE_T acltype,
2316                                   SMB_ACL_T theacl)
2317 {
2318         VFS_FIND(sys_acl_set_file);
2319         return handle->fns->sys_acl_set_file_fn(handle, name, acltype, theacl);
2320 }
2321
2322 int smb_vfs_call_sys_acl_set_fd(struct vfs_handle_struct *handle,
2323                                 struct files_struct *fsp, SMB_ACL_T theacl)
2324 {
2325         VFS_FIND(sys_acl_set_fd);
2326         return handle->fns->sys_acl_set_fd_fn(handle, fsp, theacl);
2327 }
2328
2329 int smb_vfs_call_sys_acl_delete_def_file(struct vfs_handle_struct *handle,
2330                                          const char *path)
2331 {
2332         VFS_FIND(sys_acl_delete_def_file);
2333         return handle->fns->sys_acl_delete_def_file_fn(handle, path);
2334 }
2335
2336 ssize_t smb_vfs_call_getxattr(struct vfs_handle_struct *handle,
2337                               const char *path, const char *name, void *value,
2338                               size_t size)
2339 {
2340         VFS_FIND(getxattr);
2341         return handle->fns->getxattr_fn(handle, path, name, value, size);
2342 }
2343
2344 ssize_t smb_vfs_call_fgetxattr(struct vfs_handle_struct *handle,
2345                                struct files_struct *fsp, const char *name,
2346                                void *value, size_t size)
2347 {
2348         VFS_FIND(fgetxattr);
2349         return handle->fns->fgetxattr_fn(handle, fsp, name, value, size);
2350 }
2351
2352 ssize_t smb_vfs_call_listxattr(struct vfs_handle_struct *handle,
2353                                const char *path, char *list, size_t size)
2354 {
2355         VFS_FIND(listxattr);
2356         return handle->fns->listxattr_fn(handle, path, list, size);
2357 }
2358
2359 ssize_t smb_vfs_call_flistxattr(struct vfs_handle_struct *handle,
2360                                 struct files_struct *fsp, char *list,
2361                                 size_t size)
2362 {
2363         VFS_FIND(flistxattr);
2364         return handle->fns->flistxattr_fn(handle, fsp, list, size);
2365 }
2366
2367 int smb_vfs_call_removexattr(struct vfs_handle_struct *handle,
2368                              const char *path, const char *name)
2369 {
2370         VFS_FIND(removexattr);
2371         return handle->fns->removexattr_fn(handle, path, name);
2372 }
2373
2374 int smb_vfs_call_fremovexattr(struct vfs_handle_struct *handle,
2375                               struct files_struct *fsp, const char *name)
2376 {
2377         VFS_FIND(fremovexattr);
2378         return handle->fns->fremovexattr_fn(handle, fsp, name);
2379 }
2380
2381 int smb_vfs_call_setxattr(struct vfs_handle_struct *handle, const char *path,
2382                           const char *name, const void *value, size_t size,
2383                           int flags)
2384 {
2385         VFS_FIND(setxattr);
2386         return handle->fns->setxattr_fn(handle, path, name, value, size, flags);
2387 }
2388
2389 int smb_vfs_call_fsetxattr(struct vfs_handle_struct *handle,
2390                            struct files_struct *fsp, const char *name,
2391                            const void *value, size_t size, int flags)
2392 {
2393         VFS_FIND(fsetxattr);
2394         return handle->fns->fsetxattr_fn(handle, fsp, name, value, size, flags);
2395 }
2396
2397 bool smb_vfs_call_aio_force(struct vfs_handle_struct *handle,
2398                             struct files_struct *fsp)
2399 {
2400         VFS_FIND(aio_force);
2401         return handle->fns->aio_force_fn(handle, fsp);
2402 }
2403
2404 bool smb_vfs_call_is_offline(struct vfs_handle_struct *handle,
2405                              const struct smb_filename *fname,
2406                              SMB_STRUCT_STAT *sbuf)
2407 {
2408         VFS_FIND(is_offline);
2409         return handle->fns->is_offline_fn(handle, fname, sbuf);
2410 }
2411
2412 int smb_vfs_call_set_offline(struct vfs_handle_struct *handle,
2413                              const struct smb_filename *fname)
2414 {
2415         VFS_FIND(set_offline);
2416         return handle->fns->set_offline_fn(handle, fname);
2417 }
2418
2419 NTSTATUS smb_vfs_call_durable_cookie(struct vfs_handle_struct *handle,
2420                                      struct files_struct *fsp,
2421                                      TALLOC_CTX *mem_ctx,
2422                                      DATA_BLOB *cookie)
2423 {
2424         VFS_FIND(durable_cookie);
2425         return handle->fns->durable_cookie_fn(handle, fsp, mem_ctx, cookie);
2426 }
2427
2428 NTSTATUS smb_vfs_call_durable_disconnect(struct vfs_handle_struct *handle,
2429                                          struct files_struct *fsp,
2430                                          const DATA_BLOB old_cookie,
2431                                          TALLOC_CTX *mem_ctx,
2432                                          DATA_BLOB *new_cookie)
2433 {
2434         VFS_FIND(durable_disconnect);
2435         return handle->fns->durable_disconnect_fn(handle, fsp, old_cookie,
2436                                                   mem_ctx, new_cookie);
2437 }
2438
2439 NTSTATUS smb_vfs_call_durable_reconnect(struct vfs_handle_struct *handle,
2440                                         struct smb_request *smb1req,
2441                                         struct smbXsrv_open *op,
2442                                         const DATA_BLOB old_cookie,
2443                                         TALLOC_CTX *mem_ctx,
2444                                         struct files_struct **fsp,
2445                                         DATA_BLOB *new_cookie)
2446 {
2447         VFS_FIND(durable_reconnect);
2448         return handle->fns->durable_reconnect_fn(handle, smb1req, op,
2449                                                  old_cookie, mem_ctx, fsp,
2450                                                  new_cookie);
2451 }
2452
2453 NTSTATUS smb_vfs_call_readdir_attr(struct vfs_handle_struct *handle,
2454                                    const struct smb_filename *fname,
2455                                    TALLOC_CTX *mem_ctx,
2456                                    struct readdir_attr_data **attr_data)
2457 {
2458         VFS_FIND(readdir_attr);
2459         return handle->fns->readdir_attr_fn(handle, fname, mem_ctx, attr_data);
2460 }