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[Samba.git] / source3 / smbd / vfs.c
blob0b061f1cc31cc8c1397044ce06d20d7448faf691
1 /*
2 Unix SMB/Netbios implementation.
3 Version 1.9.
4 VFS initialisation and support functions
5 Copyright (C) Tim Potter 1999
6 Copyright (C) Alexander Bokovoy 2002
7 Copyright (C) James Peach 2006
8 Copyright (C) Volker Lendecke 2009
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
22
23 This work was sponsored by Optifacio Software Services, Inc.
24 */
25
26 #include "includes.h"
27 #include "system/filesys.h"
28 #include "smbd/smbd.h"
29 #include "smbd/globals.h"
30 #include "../lib/util/memcache.h"
31 #include "transfer_file.h"
32 #include "ntioctl.h"
33 #include "lib/util/tevent_unix.h"
34 #include "lib/util/tevent_ntstatus.h"
35 #include "lib/util/sys_rw.h"
36
37 #undef DBGC_CLASS
38 #define DBGC_CLASS DBGC_VFS
39
40 static_decl_vfs;
41
42 struct vfs_fsp_data {
43 struct vfs_fsp_data *next;
44 struct vfs_handle_struct *owner;
45 void (*destroy)(void *p_data);
46 void *_dummy_;
47 /* NOTE: This structure contains four pointers so that we can guarantee
48 * that the end of the structure is always both 4-byte and 8-byte aligned.
49 */
50 };
51
52 struct vfs_init_function_entry {
53 char *name;
54 struct vfs_init_function_entry *prev, *next;
55 const struct vfs_fn_pointers *fns;
56 };
57
58 /****************************************************************************
59 maintain the list of available backends
60 ****************************************************************************/
61
62 static struct vfs_init_function_entry *vfs_find_backend_entry(const char *name)
63 {
64 struct vfs_init_function_entry *entry = backends;
65
66 DEBUG(10, ("vfs_find_backend_entry called for %s\n", name));
67
68 while(entry) {
69 if (strcmp(entry->name, name)==0) return entry;
70 entry = entry->next;
71 }
72
73 return NULL;
74 }
75
76 NTSTATUS smb_register_vfs(int version, const char *name,
77 const struct vfs_fn_pointers *fns)
78 {
79 struct vfs_init_function_entry *entry = backends;
80
81 if ((version != SMB_VFS_INTERFACE_VERSION)) {
82 DEBUG(0, ("Failed to register vfs module.\n"
83 "The module was compiled against SMB_VFS_INTERFACE_VERSION %d,\n"
84 "current SMB_VFS_INTERFACE_VERSION is %d.\n"
85 "Please recompile against the current Samba Version!\n",
86 version, SMB_VFS_INTERFACE_VERSION));
87 return NT_STATUS_OBJECT_TYPE_MISMATCH;
88 }
89
90 if (!name || !name[0]) {
91 DEBUG(0,("smb_register_vfs() called with NULL pointer or empty name!\n"));
92 return NT_STATUS_INVALID_PARAMETER;
93 }
94
95 if (vfs_find_backend_entry(name)) {
96 DEBUG(0,("VFS module %s already loaded!\n", name));
97 return NT_STATUS_OBJECT_NAME_COLLISION;
98 }
99
100 entry = SMB_XMALLOC_P(struct vfs_init_function_entry);
101 entry->name = smb_xstrdup(name);
102 entry->fns = fns;
103
104 DLIST_ADD(backends, entry);
105 DEBUG(5, ("Successfully added vfs backend '%s'\n", name));
106 return NT_STATUS_OK;
107 }
108
109 /****************************************************************************
110 initialise default vfs hooks
111 ****************************************************************************/
112
113 static void vfs_init_default(connection_struct *conn)
114 {
115 DEBUG(3, ("Initialising default vfs hooks\n"));
116 vfs_init_custom(conn, DEFAULT_VFS_MODULE_NAME);
117 }
118
119 /****************************************************************************
120 initialise custom vfs hooks
121 ****************************************************************************/
122
123 bool vfs_init_custom(connection_struct *conn, const char *vfs_object)
124 {
125 char *module_path = NULL;
126 char *module_name = NULL;
127 char *module_param = NULL, *p;
128 vfs_handle_struct *handle;
129 const struct vfs_init_function_entry *entry;
130
131 if (!conn||!vfs_object||!vfs_object[0]) {
132 DEBUG(0, ("vfs_init_custom() called with NULL pointer or "
133 "empty vfs_object!\n"));
134 return False;
135 }
136
137 if(!backends) {
138 static_init_vfs(NULL);
139 }
140
141 DEBUG(3, ("Initialising custom vfs hooks from [%s]\n", vfs_object));
142
143 module_path = smb_xstrdup(vfs_object);
144
145 p = strchr_m(module_path, ':');
146
147 if (p) {
148 *p = 0;
149 module_param = p+1;
150 trim_char(module_param, ' ', ' ');
151 }
152
153 trim_char(module_path, ' ', ' ');
154
155 module_name = smb_xstrdup(module_path);
156
157 if ((module_name[0] == '/') &&
158 (strcmp(module_path, DEFAULT_VFS_MODULE_NAME) != 0)) {
159
160 /*
161 * Extract the module name from the path. Just use the base
162 * name of the last path component.
163 */
164
165 SAFE_FREE(module_name);
166 module_name = smb_xstrdup(strrchr_m(module_path, '/')+1);
167
168 p = strchr_m(module_name, '.');
169
170 if (p != NULL) {
171 *p = '\0';
172 }
173 }
174
175 /* First, try to load the module with the new module system */
176 entry = vfs_find_backend_entry(module_name);
177 if (!entry) {
178 NTSTATUS status;
179
180 DEBUG(5, ("vfs module [%s] not loaded - trying to load...\n",
181 vfs_object));
182
183 status = smb_load_module("vfs", module_path);
184 if (!NT_STATUS_IS_OK(status)) {
185 DEBUG(0, ("error probing vfs module '%s': %s\n",
186 module_path, nt_errstr(status)));
187 goto fail;
188 }
189
190 entry = vfs_find_backend_entry(module_name);
191 if (!entry) {
192 DEBUG(0,("Can't find a vfs module [%s]\n",vfs_object));
193 goto fail;
194 }
195 }
196
197 DEBUGADD(5,("Successfully loaded vfs module [%s] with the new modules system\n", vfs_object));
198
199 handle = talloc_zero(conn, vfs_handle_struct);
200 if (!handle) {
201 DEBUG(0,("TALLOC_ZERO() failed!\n"));
202 goto fail;
203 }
204 handle->conn = conn;
205 handle->fns = entry->fns;
206 if (module_param) {
207 handle->param = talloc_strdup(conn, module_param);
208 }
209 DLIST_ADD(conn->vfs_handles, handle);
210
211 SAFE_FREE(module_path);
212 SAFE_FREE(module_name);
213 return True;
214
215 fail:
216 SAFE_FREE(module_path);
217 SAFE_FREE(module_name);
218 return False;
219 }
220
221 /*****************************************************************
222 Allow VFS modules to extend files_struct with VFS-specific state.
223 This will be ok for small numbers of extensions, but might need to
224 be refactored if it becomes more widely used.
225 ******************************************************************/
226
227 #define EXT_DATA_AREA(e) ((uint8_t *)(e) + sizeof(struct vfs_fsp_data))
228
229 void *vfs_add_fsp_extension_notype(vfs_handle_struct *handle,
230 files_struct *fsp, size_t ext_size,
231 void (*destroy_fn)(void *p_data))
232 {
233 struct vfs_fsp_data *ext;
234 void * ext_data;
235
236 /* Prevent VFS modules adding multiple extensions. */
237 if ((ext_data = vfs_fetch_fsp_extension(handle, fsp))) {
238 return ext_data;
239 }
240
241 ext = talloc_zero_size(
242 handle->conn, sizeof(struct vfs_fsp_data) + ext_size);
243 if (ext == NULL) {
244 return NULL;
245 }
246
247 ext->owner = handle;
248 ext->next = fsp->vfs_extension;
249 ext->destroy = destroy_fn;
250 fsp->vfs_extension = ext;
251 return EXT_DATA_AREA(ext);
252 }
253
254 void vfs_remove_fsp_extension(vfs_handle_struct *handle, files_struct *fsp)
255 {
256 struct vfs_fsp_data *curr;
257 struct vfs_fsp_data *prev;
258
259 for (curr = fsp->vfs_extension, prev = NULL;
260 curr;
261 prev = curr, curr = curr->next) {
262 if (curr->owner == handle) {
263 if (prev) {
264 prev->next = curr->next;
265 } else {
266 fsp->vfs_extension = curr->next;
267 }
268 if (curr->destroy) {
269 curr->destroy(EXT_DATA_AREA(curr));
270 }
271 TALLOC_FREE(curr);
272 return;
273 }
274 }
275 }
276
277 void vfs_remove_all_fsp_extensions(files_struct *fsp)
278 {
279 struct vfs_fsp_data *curr;
280 struct vfs_fsp_data *next;
281
282 for (curr = fsp->vfs_extension; curr; curr = next) {
283
284 next = curr->next;
285 fsp->vfs_extension = next;
286
287 if (curr->destroy) {
288 curr->destroy(EXT_DATA_AREA(curr));
289 }
290 TALLOC_FREE(curr);
291 }
292 }
293
294 void *vfs_memctx_fsp_extension(vfs_handle_struct *handle,
295 const struct files_struct *fsp)
296 {
297 struct vfs_fsp_data *head;
298
299 for (head = fsp->vfs_extension; head; head = head->next) {
300 if (head->owner == handle) {
301 return head;
302 }
303 }
304
305 return NULL;
306 }
307
308 void *vfs_fetch_fsp_extension(vfs_handle_struct *handle,
309 const struct files_struct *fsp)
310 {
311 struct vfs_fsp_data *head;
312
313 head = (struct vfs_fsp_data *)vfs_memctx_fsp_extension(handle, fsp);
314 if (head != NULL) {
315 return EXT_DATA_AREA(head);
316 }
317
318 return NULL;
319 }
320
321 #undef EXT_DATA_AREA
322
323 /*
324 * Ensure this module catches all VFS functions.
325 */
326 #ifdef DEVELOPER
327 void smb_vfs_assert_all_fns(const struct vfs_fn_pointers* fns,
328 const char *module)
329 {
330 bool missing_fn = false;
331 unsigned int idx;
332 const uintptr_t *end = (const uintptr_t *)(fns + 1);
333
334 for (idx = 0; ((const uintptr_t *)fns + idx) < end; idx++) {
335 if (*((const uintptr_t *)fns + idx) == 0) {
336 DBG_ERR("VFS function at index %d not implemented "
337 "in module %s\n", idx, module);
338 missing_fn = true;
339 }
340 }
341
342 if (missing_fn) {
343 smb_panic("Required VFS function not implemented in module.\n");
344 }
345 }
346 #else
347 void smb_vfs_assert_all_fns(const struct vfs_fn_pointers* fns,
348 const char *module)
349 {
350 }
351 #endif
352
353 /*****************************************************************
354 Generic VFS init.
355 ******************************************************************/
356
357 bool smbd_vfs_init(connection_struct *conn)
358 {
359 const char **vfs_objects;
360 unsigned int i = 0;
361 int j = 0;
362
363 /* Normal share - initialise with disk access functions */
364 vfs_init_default(conn);
365
366 /* No need to load vfs modules for printer connections */
367 if (conn->printer) {
368 return True;
369 }
370
371 if (lp_widelinks(SNUM(conn))) {
372 /*
373 * As the widelinks logic is now moving into a
374 * vfs_widelinks module, we need to custom load
375 * it after the default module is initialized.
376 * That way no changes to smb.conf files are
377 * needed.
378 */
379 bool ok = vfs_init_custom(conn, "widelinks");
380 if (!ok) {
381 DBG_ERR("widelinks enabled and vfs_init_custom "
382 "failed for vfs_widelinks module\n");
383 return false;
384 }
385 }
386
387 vfs_objects = lp_vfs_objects(SNUM(conn));
388
389 /* Override VFS functions if 'vfs object' was not specified*/
390 if (!vfs_objects || !vfs_objects[0])
391 return True;
392
393 for (i=0; vfs_objects[i] ;) {
394 i++;
395 }
396
397 for (j=i-1; j >= 0; j--) {
398 if (!vfs_init_custom(conn, vfs_objects[j])) {
399 DEBUG(0, ("smbd_vfs_init: vfs_init_custom failed for %s\n", vfs_objects[j]));
400 return False;
401 }
402 }
403 return True;
404 }
405
406 /*******************************************************************
407 Check if a file exists in the vfs.
408 ********************************************************************/
409
410 NTSTATUS vfs_file_exist(connection_struct *conn, struct smb_filename *smb_fname)
411 {
412 /* Only return OK if stat was successful and S_ISREG */
413 if ((SMB_VFS_STAT(conn, smb_fname) != -1) &&
414 S_ISREG(smb_fname->st.st_ex_mode)) {
415 return NT_STATUS_OK;
416 }
417
418 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
419 }
420
421 bool vfs_valid_pread_range(off_t offset, size_t length)
422 {
423 return sys_valid_io_range(offset, length);
424 }
425
426 bool vfs_valid_pwrite_range(off_t offset, size_t length)
427 {
428 /*
429 * See MAXFILESIZE in [MS-FSA] 2.1.5.3 Server Requests a Write
430 */
431 static const uint64_t maxfilesize = 0xfffffff0000;
432 uint64_t last_byte_ofs;
433 bool ok;
434
435 ok = sys_valid_io_range(offset, length);
436 if (!ok) {
437 return false;
438 }
439
440 if (length == 0) {
441 return true;
442 }
443
444 last_byte_ofs = offset + length;
445 if (last_byte_ofs > maxfilesize) {
446 return false;
447 }
448
449 return true;
450 }
451
452 ssize_t vfs_pwrite_data(struct smb_request *req,
453 files_struct *fsp,
454 const char *buffer,
455 size_t N,
456 off_t offset)
457 {
458 size_t total=0;
459 ssize_t ret;
460 bool ok;
461
462 ok = vfs_valid_pwrite_range(offset, N);
463 if (!ok) {
464 errno = EINVAL;
465 return -1;
466 }
467
468 if (req && req->unread_bytes) {
469 int sockfd = req->xconn->transport.sock;
470 SMB_ASSERT(req->unread_bytes == N);
471 /* VFS_RECVFILE must drain the socket
472 * before returning. */
473 req->unread_bytes = 0;
474 /*
475 * Leave the socket non-blocking and
476 * use SMB_VFS_RECVFILE. If it returns
477 * EAGAIN || EWOULDBLOCK temporarily set
478 * the socket blocking and retry
479 * the RECVFILE.
480 */
481 while (total < N) {
482 ret = SMB_VFS_RECVFILE(sockfd,
483 fsp,
484 offset + total,
485 N - total);
486 if (ret == 0 || (ret == -1 &&
487 (errno == EAGAIN ||
488 errno == EWOULDBLOCK))) {
489 int old_flags;
490 /* Ensure the socket is blocking. */
491 old_flags = fcntl(sockfd, F_GETFL, 0);
492 if (set_blocking(sockfd, true) == -1) {
493 return (ssize_t)-1;
494 }
495 ret = SMB_VFS_RECVFILE(sockfd,
496 fsp,
497 offset + total,
498 N - total);
499 if (fcntl(sockfd, F_SETFL, old_flags) == -1) {
500 return (ssize_t)-1;
501 }
502 if (ret == -1) {
503 return (ssize_t)-1;
504 }
505 total += ret;
506 return (ssize_t)total;
507 }
508 /* Any other error case. */
509 if (ret == -1) {
510 return ret;
511 }
512 total += ret;
513 }
514 return (ssize_t)total;
515 }
516
517 while (total < N) {
518 ret = SMB_VFS_PWRITE(fsp, buffer + total, N - total,
519 offset + total);
520
521 if (ret == -1)
522 return -1;
523 if (ret == 0)
524 return total;
525
526 total += ret;
527 }
528 return (ssize_t)total;
529 }
530 /****************************************************************************
531 An allocate file space call using the vfs interface.
532 Allocates space for a file from a filedescriptor.
533 Returns 0 on success, -1 on failure.
534 ****************************************************************************/
535
536 int vfs_allocate_file_space(files_struct *fsp, uint64_t len)
537 {
538 int ret;
539 connection_struct *conn = fsp->conn;
540 uint64_t space_avail;
541 uint64_t bsize,dfree,dsize;
542 NTSTATUS status;
543 bool ok;
544
545 /*
546 * Actually try and commit the space on disk....
547 */
548
549 DEBUG(10,("vfs_allocate_file_space: file %s, len %.0f\n",
550 fsp_str_dbg(fsp), (double)len));
551
552 ok = vfs_valid_pwrite_range((off_t)len, 0);
553 if (!ok) {
554 DEBUG(0,("vfs_allocate_file_space: %s negative/invalid len "
555 "requested.\n", fsp_str_dbg(fsp)));
556 errno = EINVAL;
557 return -1;
558 }
559
560 status = vfs_stat_fsp(fsp);
561 if (!NT_STATUS_IS_OK(status)) {
562 return -1;
563 }
564
565 if (len == (uint64_t)fsp->fsp_name->st.st_ex_size)
566 return 0;
567
568 if (len < (uint64_t)fsp->fsp_name->st.st_ex_size) {
569 /* Shrink - use ftruncate. */
570
571 DEBUG(10,("vfs_allocate_file_space: file %s, shrink. Current "
572 "size %.0f\n", fsp_str_dbg(fsp),
573 (double)fsp->fsp_name->st.st_ex_size));
574
575 contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_ALLOC_SHRINK);
576
577 ret = SMB_VFS_FTRUNCATE(fsp, (off_t)len);
578
579 contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_ALLOC_SHRINK);
580
581 return ret;
582 }
583
584 /* Grow - we need to test if we have enough space. */
585
586 contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_ALLOC_GROW);
587
588 if (lp_strict_allocate(SNUM(fsp->conn))) {
589 /* See if we have a syscall that will allocate beyond
590 end-of-file without changing EOF. */
591 ret = SMB_VFS_FALLOCATE(fsp, VFS_FALLOCATE_FL_KEEP_SIZE,
592 0, len);
593 } else {
594 ret = 0;
595 }
596
597 contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_ALLOC_GROW);
598
599 if (ret == 0) {
600 /* We changed the allocation size on disk, but not
601 EOF - exactly as required. We're done ! */
602 return 0;
603 }
604
605 if (ret == -1 && errno == ENOSPC) {
606 return -1;
607 }
608
609 len -= fsp->fsp_name->st.st_ex_size;
610 len /= 1024; /* Len is now number of 1k blocks needed. */
611 space_avail =
612 get_dfree_info(conn, fsp->fsp_name, &bsize, &dfree, &dsize);
613 if (space_avail == (uint64_t)-1) {
614 return -1;
615 }
616
617 DEBUG(10,("vfs_allocate_file_space: file %s, grow. Current size %.0f, "
618 "needed blocks = %.0f, space avail = %.0f\n",
619 fsp_str_dbg(fsp), (double)fsp->fsp_name->st.st_ex_size, (double)len,
620 (double)space_avail));
621
622 if (len > space_avail) {
623 errno = ENOSPC;
624 return -1;
625 }
626
627 return 0;
628 }
629
630 /****************************************************************************
631 A vfs set_filelen call.
632 set the length of a file from a filedescriptor.
633 Returns 0 on success, -1 on failure.
634 ****************************************************************************/
635
636 int vfs_set_filelen(files_struct *fsp, off_t len)
637 {
638 int ret;
639 bool ok;
640
641 ok = vfs_valid_pwrite_range(len, 0);
642 if (!ok) {
643 errno = EINVAL;
644 return -1;
645 }
646
647 contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_SET_FILE_LEN);
648
649 DEBUG(10,("vfs_set_filelen: ftruncate %s to len %.0f\n",
650 fsp_str_dbg(fsp), (double)len));
651 if ((ret = SMB_VFS_FTRUNCATE(fsp, len)) != -1) {
652 notify_fname(fsp->conn, NOTIFY_ACTION_MODIFIED,
653 FILE_NOTIFY_CHANGE_SIZE
654 | FILE_NOTIFY_CHANGE_ATTRIBUTES,
655 fsp->fsp_name->base_name);
656 }
657
658 contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_SET_FILE_LEN);
659
660 return ret;
661 }
662
663 /****************************************************************************
664 A slow version of fallocate. Fallback code if SMB_VFS_FALLOCATE
665 fails. Needs to be outside of the default version of SMB_VFS_FALLOCATE
666 as this is also called from the default SMB_VFS_FTRUNCATE code.
667 Always extends the file size.
668 Returns 0 on success, -1 on failure.
669 ****************************************************************************/
670
671 #define SPARSE_BUF_WRITE_SIZE (32*1024)
672
673 int vfs_slow_fallocate(files_struct *fsp, off_t offset, off_t len)
674 {
675 ssize_t pwrite_ret;
676 size_t total = 0;
677 bool ok;
678
679 ok = vfs_valid_pwrite_range(offset, len);
680 if (!ok) {
681 errno = EINVAL;
682 return -1;
683 }
684
685 if (!sparse_buf) {
686 sparse_buf = SMB_CALLOC_ARRAY(char, SPARSE_BUF_WRITE_SIZE);
687 if (!sparse_buf) {
688 errno = ENOMEM;
689 return -1;
690 }
691 }
692
693 while (total < len) {
694 size_t curr_write_size = MIN(SPARSE_BUF_WRITE_SIZE, (len - total));
695
696 pwrite_ret = SMB_VFS_PWRITE(fsp, sparse_buf, curr_write_size, offset + total);
697 if (pwrite_ret == -1) {
698 int saved_errno = errno;
699 DEBUG(10,("vfs_slow_fallocate: SMB_VFS_PWRITE for file "
700 "%s failed with error %s\n",
701 fsp_str_dbg(fsp), strerror(saved_errno)));
702 errno = saved_errno;
703 return -1;
704 }
705 total += pwrite_ret;
706 }
707
708 return 0;
709 }
710
711 /****************************************************************************
712 A vfs fill sparse call.
713 Writes zeros from the end of file to len, if len is greater than EOF.
714 Used only by strict_sync.
715 Returns 0 on success, -1 on failure.
716 ****************************************************************************/
717
718 int vfs_fill_sparse(files_struct *fsp, off_t len)
719 {
720 int ret;
721 NTSTATUS status;
722 off_t offset;
723 size_t num_to_write;
724 bool ok;
725
726 ok = vfs_valid_pwrite_range(len, 0);
727 if (!ok) {
728 errno = EINVAL;
729 return -1;
730 }
731
732 status = vfs_stat_fsp(fsp);
733 if (!NT_STATUS_IS_OK(status)) {
734 return -1;
735 }
736
737 if (len <= fsp->fsp_name->st.st_ex_size) {
738 return 0;
739 }
740
741 #ifdef S_ISFIFO
742 if (S_ISFIFO(fsp->fsp_name->st.st_ex_mode)) {
743 return 0;
744 }
745 #endif
746
747 DEBUG(10,("vfs_fill_sparse: write zeros in file %s from len %.0f to "
748 "len %.0f (%.0f bytes)\n", fsp_str_dbg(fsp),
749 (double)fsp->fsp_name->st.st_ex_size, (double)len,
750 (double)(len - fsp->fsp_name->st.st_ex_size)));
751
752 contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_FILL_SPARSE);
753
754 offset = fsp->fsp_name->st.st_ex_size;
755 num_to_write = len - fsp->fsp_name->st.st_ex_size;
756
757 /* Only do this on non-stream file handles. */
758 if (!fsp_is_alternate_stream(fsp)) {
759 /* for allocation try fallocate first. This can fail on some
760 * platforms e.g. when the filesystem doesn't support it and no
761 * emulation is being done by the libc (like on AIX with JFS1). In that
762 * case we do our own emulation. fallocate implementations can
763 * return ENOTSUP or EINVAL in cases like that. */
764 ret = SMB_VFS_FALLOCATE(fsp, 0, offset, num_to_write);
765 if (ret == -1 && errno == ENOSPC) {
766 goto out;
767 }
768 if (ret == 0) {
769 goto out;
770 }
771 DEBUG(10,("vfs_fill_sparse: SMB_VFS_FALLOCATE failed with "
772 "error %d. Falling back to slow manual allocation\n", ret));
773 }
774
775 ret = vfs_slow_fallocate(fsp, offset, num_to_write);
776
777 out:
778
779 contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_FILL_SPARSE);
780 return ret;
781 }
782
783 /*******************************************************************************
784 Set a fd into blocking/nonblocking mode through VFS
785 *******************************************************************************/
786
787 int vfs_set_blocking(files_struct *fsp, bool set)
788 {
789 int val;
790 #ifdef O_NONBLOCK
791 #define FLAG_TO_SET O_NONBLOCK
792 #else
793 #ifdef SYSV
794 #define FLAG_TO_SET O_NDELAY
795 #else /* BSD */
796 #define FLAG_TO_SET FNDELAY
797 #endif
798 #endif
799
800 if (fsp->fsp_flags.is_pathref) {
801 return 0;
802 }
803
804 val = SMB_VFS_FCNTL(fsp, F_GETFL, 0);
805 if (val == -1) {
806 return -1;
807 }
808
809 if (set) {
810 val &= ~FLAG_TO_SET;
811 } else {
812 val |= FLAG_TO_SET;
813 }
814
815 return SMB_VFS_FCNTL(fsp, F_SETFL, val);
816 #undef FLAG_TO_SET
817 }
818
819 /****************************************************************************
820 Transfer some data (n bytes) between two file_struct's.
821 ****************************************************************************/
822
823 static ssize_t vfs_pread_fn(void *file, void *buf, size_t len, off_t offset)
824 {
825 struct files_struct *fsp = (struct files_struct *)file;
826
827 return SMB_VFS_PREAD(fsp, buf, len, offset);
828 }
829
830 static ssize_t vfs_pwrite_fn(void *file, const void *buf, size_t len, off_t offset)
831 {
832 struct files_struct *fsp = (struct files_struct *)file;
833
834 return SMB_VFS_PWRITE(fsp, buf, len, offset);
835 }
836
837 off_t vfs_transfer_file(files_struct *in, files_struct *out, off_t n)
838 {
839 return transfer_file_internal((void *)in, (void *)out, n,
840 vfs_pread_fn, vfs_pwrite_fn);
841 }
842
843 /*******************************************************************
844 A vfs_readdir wrapper which just returns the file name.
845 ********************************************************************/
846
847 const char *vfs_readdirname(connection_struct *conn,
848 struct files_struct *dirfsp,
849 DIR *d,
850 char **talloced)
851 {
852 struct dirent *ptr= NULL;
853 const char *dname;
854 char *translated;
855 NTSTATUS status;
856
857 if (d == NULL) {
858 return(NULL);
859 }
860
861 ptr = SMB_VFS_READDIR(conn, dirfsp, d);
862 if (!ptr)
863 return(NULL);
864
865 dname = ptr->d_name;
866
867 status = SMB_VFS_TRANSLATE_NAME(conn, dname, vfs_translate_to_windows,
868 talloc_tos(), &translated);
869 if (NT_STATUS_EQUAL(status, NT_STATUS_NONE_MAPPED)) {
870 *talloced = NULL;
871 return dname;
872 }
873 *talloced = translated;
874 if (!NT_STATUS_IS_OK(status)) {
875 return NULL;
876 }
877 return translated;
878 }
879
880 /*******************************************************************
881 A wrapper for vfs_chdir().
882 ********************************************************************/
883
884 int vfs_ChDir(connection_struct *conn, const struct smb_filename *smb_fname)
885 {
886 int ret;
887 struct smb_filename *cwd = NULL;
888
889 if (!LastDir) {
890 LastDir = SMB_STRDUP("");
891 }
892
893 if (ISDOT(smb_fname->base_name)) {
894 /*
895 * passing a '.' is a noop,
896 * and we only expect this after
897 * everything is initialized.
898 *
899 * So the first vfs_ChDir() on a given
900 * connection_struct must not be '.'.
901 *
902 * Note: conn_new() sets
903 * conn->cwd_fsp->fh->fd = -1
904 * and vfs_ChDir() leaves with
905 * conn->cwd_fsp->fh->fd = AT_FDCWD
906 * on success!
907 */
908 if (fsp_get_pathref_fd(conn->cwd_fsp) != AT_FDCWD) {
909 /*
910 * This should never happen and
911 * we might change this to
912 * SMB_ASSERT() in future.
913 */
914 DBG_ERR("Called with '.' as first operation!\n");
915 log_stack_trace();
916 errno = EINVAL;
917 return -1;
918 }
919 return 0;
920 }
921
922 if (smb_fname->base_name[0] == '/' &&
923 strcsequal(LastDir,smb_fname->base_name))
924 {
925 /*
926 * conn->cwd_fsp->fsp_name and the kernel
927 * are already correct, but conn->cwd_fsp->fh->fd
928 * might still be -1 as initialized in conn_new().
929 *
930 * This can happen when a client made a 2nd
931 * tree connect to a share with the same underlying
932 * path (may or may not the same share).
933 */
934 fsp_set_fd(conn->cwd_fsp, AT_FDCWD);
935 return 0;
936 }
937
938 DEBUG(4,("vfs_ChDir to %s\n", smb_fname->base_name));
939
940 ret = SMB_VFS_CHDIR(conn, smb_fname);
941 if (ret != 0) {
942 return -1;
943 }
944
945 /*
946 * Always replace conn->cwd_fsp. We
947 * don't know if it's been modified by
948 * VFS modules in the stack.
949 */
950 fsp_set_fd(conn->cwd_fsp, AT_FDCWD);
951
952 /* conn cache. */
953 cwd = vfs_GetWd(conn, conn);
954 if (cwd == NULL) {
955 /*
956 * vfs_GetWd() failed.
957 * We must be able to read cwd.
958 * Return to original directory
959 * and return -1.
960 */
961 int saved_errno = errno;
962
963 if (conn->cwd_fsp->fsp_name == NULL) {
964 /*
965 * Failed on the very first chdir()+getwd()
966 * for this connection. We can't
967 * continue.
968 */
969 smb_panic("conn->cwd getwd failed\n");
970 /* NOTREACHED */
971 return -1;
972 }
973
974 /* Return to the previous $cwd. */
975 ret = SMB_VFS_CHDIR(conn, conn->cwd_fsp->fsp_name);
976 if (ret != 0) {
977 smb_panic("conn->cwd getwd failed\n");
978 /* NOTREACHED */
979 return -1;
980 }
981 errno = saved_errno;
982 /* And fail the chdir(). */
983 return -1;
984 }
985
986 /* vfs_GetWd() succeeded. */
987 /* Replace global cache. */
988 SAFE_FREE(LastDir);
989 LastDir = SMB_STRDUP(smb_fname->base_name);
990
991 /*
992 * (Indirect) Callers of vfs_ChDir() may still hold references to the
993 * old conn->cwd_fsp->fsp_name. Move it to talloc_tos(), that way
994 * callers can use it for the lifetime of the SMB request.
995 */
996 talloc_move(talloc_tos(), &conn->cwd_fsp->fsp_name);
997
998 conn->cwd_fsp->fsp_name = talloc_move(conn->cwd_fsp, &cwd);
999
1000 DBG_INFO("vfs_ChDir got %s\n", fsp_str_dbg(conn->cwd_fsp));
1001
1002 return ret;
1003 }
1004
1005 /*******************************************************************
1006 Return the absolute current directory path - given a UNIX pathname.
1007 Note that this path is returned in DOS format, not UNIX
1008 format. Note this can be called with conn == NULL.
1009 ********************************************************************/
1010
1011 struct smb_filename *vfs_GetWd(TALLOC_CTX *ctx, connection_struct *conn)
1012 {
1013 struct smb_filename *current_dir_fname = NULL;
1014 struct file_id key;
1015 struct smb_filename *smb_fname_dot = NULL;
1016 struct smb_filename *smb_fname_full = NULL;
1017 struct smb_filename *result = NULL;
1018
1019 if (!lp_getwd_cache()) {
1020 goto nocache;
1021 }
1022
1023 smb_fname_dot = synthetic_smb_fname(ctx,
1024 ".",
1025 NULL,
1026 NULL,
1027 0,
1028 0);
1029 if (smb_fname_dot == NULL) {
1030 errno = ENOMEM;
1031 goto out;
1032 }
1033
1034 if (SMB_VFS_STAT(conn, smb_fname_dot) == -1) {
1035 /*
1036 * Known to fail for root: the directory may be NFS-mounted
1037 * and exported with root_squash (so has no root access).
1038 */
1039 DEBUG(1,("vfs_GetWd: couldn't stat \".\" error %s "
1040 "(NFS problem ?)\n", strerror(errno) ));
1041 goto nocache;
1042 }
1043
1044 key = vfs_file_id_from_sbuf(conn, &smb_fname_dot->st);
1045
1046 smb_fname_full = (struct smb_filename *)memcache_lookup_talloc(
1047 smbd_memcache(),
1048 GETWD_CACHE,
1049 data_blob_const(&key, sizeof(key)));
1050
1051 if (smb_fname_full == NULL) {
1052 goto nocache;
1053 }
1054
1055 if ((SMB_VFS_STAT(conn, smb_fname_full) == 0) &&
1056 (smb_fname_dot->st.st_ex_dev == smb_fname_full->st.st_ex_dev) &&
1057 (smb_fname_dot->st.st_ex_ino == smb_fname_full->st.st_ex_ino) &&
1058 (S_ISDIR(smb_fname_dot->st.st_ex_mode))) {
1059 /*
1060 * Ok, we're done
1061 * Note: smb_fname_full is owned by smbd_memcache()
1062 * so we must make a copy to return.
1063 */
1064 result = cp_smb_filename(ctx, smb_fname_full);
1065 if (result == NULL) {
1066 errno = ENOMEM;
1067 }
1068 goto out;
1069 }
1070
1071 nocache:
1072
1073 /*
1074 * We don't have the information to hand so rely on traditional
1075 * methods. The very slow getcwd, which spawns a process on some
1076 * systems, or the not quite so bad getwd.
1077 */
1078
1079 current_dir_fname = SMB_VFS_GETWD(conn, ctx);
1080 if (current_dir_fname == NULL) {
1081 DEBUG(0, ("vfs_GetWd: SMB_VFS_GETWD call failed: %s\n",
1082 strerror(errno)));
1083 goto out;
1084 }
1085
1086 if (lp_getwd_cache() && VALID_STAT(smb_fname_dot->st)) {
1087 key = vfs_file_id_from_sbuf(conn, &smb_fname_dot->st);
1088
1089 /*
1090 * smbd_memcache() will own current_dir_fname after the
1091 * memcache_add_talloc call, so we must make
1092 * a copy on ctx to return.
1093 */
1094 result = cp_smb_filename(ctx, current_dir_fname);
1095 if (result == NULL) {
1096 errno = ENOMEM;
1097 }
1098
1099 /*
1100 * Ensure the memory going into the cache
1101 * doesn't have a destructor so it can be
1102 * cleanly freed.
1103 */
1104 talloc_set_destructor(current_dir_fname, NULL);
1105
1106 memcache_add_talloc(smbd_memcache(),
1107 GETWD_CACHE,
1108 data_blob_const(&key, sizeof(key)),
1109 &current_dir_fname);
1110 /* current_dir_fname is now == NULL here. */
1111 } else {
1112 /* current_dir_fname is already allocated on ctx. */
1113 result = current_dir_fname;
1114 }
1115
1116 out:
1117 TALLOC_FREE(smb_fname_dot);
1118 /*
1119 * Don't free current_dir_fname here. It's either been moved
1120 * to the memcache or is being returned in result.
1121 */
1122 return result;
1123 }
1124
1125 /*
1126 * Ensure LSTAT is called for POSIX paths.
1127 */
1128 int vfs_stat(struct connection_struct *conn,
1129 struct smb_filename *smb_fname)
1130 {
1131 if (smb_fname->flags & SMB_FILENAME_POSIX_PATH) {
1132 return SMB_VFS_LSTAT(conn, smb_fname);
1133 }
1134 return SMB_VFS_STAT(conn, smb_fname);
1135 }
1136
1137 /**
1138 * XXX: This is temporary and there should be no callers of this once
1139 * smb_filename is plumbed through all path based operations.
1140 *
1141 * Called when we know stream name parsing has already been done.
1142 */
1143 int vfs_stat_smb_basename(struct connection_struct *conn,
1144 const struct smb_filename *smb_fname_in,
1145 SMB_STRUCT_STAT *psbuf)
1146 {
1147 struct smb_filename smb_fname = {
1148 .base_name = discard_const_p(char, smb_fname_in->base_name),
1149 .flags = smb_fname_in->flags,
1150 .twrp = smb_fname_in->twrp,
1151 };
1152 int ret;
1153
1154 ret = vfs_stat(conn, &smb_fname);
1155 if (ret != -1) {
1156 *psbuf = smb_fname.st;
1157 }
1158 return ret;
1159 }
1160
1161 /**
1162 * Ensure LSTAT is called for POSIX paths.
1163 */
1164
1165 NTSTATUS vfs_stat_fsp(files_struct *fsp)
1166 {
1167 int ret;
1168 struct stat_ex saved_stat = fsp->fsp_name->st;
1169
1170 if (fsp->fake_file_handle != NULL) {
1171 return NT_STATUS_OK;
1172 }
1173
1174 if (fsp_get_pathref_fd(fsp) == -1) {
1175 if (fsp->posix_flags & FSP_POSIX_FLAGS_OPEN) {
1176 ret = SMB_VFS_LSTAT(fsp->conn, fsp->fsp_name);
1177 } else {
1178 ret = SMB_VFS_STAT(fsp->conn, fsp->fsp_name);
1179 }
1180 } else {
1181 ret = SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st);
1182 }
1183 if (ret == -1) {
1184 return map_nt_error_from_unix(errno);
1185 }
1186 update_stat_ex_from_saved_stat(&fsp->fsp_name->st, &saved_stat);
1187 fsp->fsp_flags.is_directory = S_ISDIR(fsp->fsp_name->st.st_ex_mode);
1188 return NT_STATUS_OK;
1189 }
1190
1191 void init_smb_file_time(struct smb_file_time *ft)
1192 {
1193 *ft = (struct smb_file_time) {
1194 .atime = make_omit_timespec(),
1195 .ctime = make_omit_timespec(),
1196 .mtime = make_omit_timespec(),
1197 .create_time = make_omit_timespec()
1198 };
1199 }
1200
1201 /**
1202 * Initialize num_streams and streams, then call VFS op streaminfo
1203 */
1204
1205 NTSTATUS vfs_fstreaminfo(struct files_struct *fsp,
1206 TALLOC_CTX *mem_ctx,
1207 unsigned int *num_streams,
1208 struct stream_struct **streams)
1209 {
1210 *num_streams = 0;
1211 *streams = NULL;
1212
1213 if (fsp == NULL) {
1214 /*
1215 * Callers may pass fsp == NULL when passing smb_fname->fsp of a
1216 * symlink. This is ok, handle it here, by just return no
1217 * streams on a symlink.
1218 */
1219 return NT_STATUS_OK;
1220 }
1221
1222 if (fsp_get_pathref_fd(fsp) == -1) {
1223 /*
1224 * No streams on non-real files/directories.
1225 */
1226 return NT_STATUS_OK;
1227 }
1228
1229 return SMB_VFS_FSTREAMINFO(fsp,
1230 mem_ctx,
1231 num_streams,
1232 streams);
1233 }
1234
1235 int vfs_fake_fd(void)
1236 {
1237 int pipe_fds[2];
1238 int ret;
1239
1240 /*
1241 * Return a valid fd, but ensure any attempt to use
1242 * it returns an error (EPIPE).
1243 */
1244 ret = pipe(pipe_fds);
1245 if (ret != 0) {
1246 return -1;
1247 }
1248
1249 close(pipe_fds[1]);
1250 return pipe_fds[0];
1251 }
1252
1253 /*
1254 * This is just a helper to make
1255 * users of vfs_fake_fd() more symmetric
1256 */
1257 int vfs_fake_fd_close(int fd)
1258 {
1259 return close(fd);
1260 }
1261
1262 /*
1263 generate a file_id from a stat structure
1264 */
1265 struct file_id vfs_file_id_from_sbuf(connection_struct *conn, const SMB_STRUCT_STAT *sbuf)
1266 {
1267 return SMB_VFS_FILE_ID_CREATE(conn, sbuf);
1268 }
1269
1270 NTSTATUS vfs_at_fspcwd(TALLOC_CTX *mem_ctx,
1271 struct connection_struct *conn,
1272 struct files_struct **_fsp)
1273 {
1274 struct files_struct *fsp = NULL;
1275
1276 fsp = talloc_zero(mem_ctx, struct files_struct);
1277 if (fsp == NULL) {
1278 return NT_STATUS_NO_MEMORY;
1279 }
1280
1281 fsp->fsp_name = synthetic_smb_fname(fsp, ".", NULL, NULL, 0, 0);
1282 if (fsp->fsp_name == NULL) {
1283 TALLOC_FREE(fsp);
1284 return NT_STATUS_NO_MEMORY;
1285 }
1286
1287 fsp->fh = fd_handle_create(fsp);
1288 if (fsp->fh == NULL) {
1289 TALLOC_FREE(fsp);
1290 return NT_STATUS_NO_MEMORY;
1291 }
1292
1293 fsp_set_fd(fsp, AT_FDCWD);
1294 fsp->fnum = FNUM_FIELD_INVALID;
1295 fsp->conn = conn;
1296
1297 *_fsp = fsp;
1298 return NT_STATUS_OK;
1299 }
1300
1301 static struct smb_vfs_deny_state *smb_vfs_deny_global;
1302
1303 void smb_vfs_assert_allowed(void)
1304 {
1305 if (unlikely(smb_vfs_deny_global != NULL)) {
1306 DBG_ERR("Called with VFS denied by %s\n",
1307 smb_vfs_deny_global->location);
1308 smb_panic("Called with VFS denied!");
1309 }
1310 }
1311
1312 void _smb_vfs_deny_push(struct smb_vfs_deny_state *state, const char *location)
1313 {
1314 SMB_ASSERT(smb_vfs_deny_global != state);
1315
1316 *state = (struct smb_vfs_deny_state) {
1317 .parent = smb_vfs_deny_global,
1318 .location = location,
1319 };
1320
1321 smb_vfs_deny_global = state;
1322 }
1323
1324 void _smb_vfs_deny_pop(struct smb_vfs_deny_state *state, const char *location)
1325 {
1326 SMB_ASSERT(smb_vfs_deny_global == state);
1327
1328 smb_vfs_deny_global = state->parent;
1329
1330 *state = (struct smb_vfs_deny_state) { .parent = NULL, };
1331 }
1332
1333 #define VFS_FIND(__fn__) do { \
1334 if (unlikely(smb_vfs_deny_global != NULL)) { \
1335 DBG_ERR("Called with VFS denied by %s\n", \
1336 smb_vfs_deny_global->location); \
1337 smb_panic("Called with VFS denied!"); \
1338 } \
1339 while (handle->fns->__fn__##_fn==NULL) { \
1340 handle = handle->next; \
1341 } \
1342 } while(0)
1343
1344 int smb_vfs_call_connect(struct vfs_handle_struct *handle,
1345 const char *service, const char *user)
1346 {
1347 VFS_FIND(connect);
1348 return handle->fns->connect_fn(handle, service, user);
1349 }
1350
1351 void smb_vfs_call_disconnect(struct vfs_handle_struct *handle)
1352 {
1353 VFS_FIND(disconnect);
1354 handle->fns->disconnect_fn(handle);
1355 }
1356
1357 uint64_t smb_vfs_call_disk_free(struct vfs_handle_struct *handle,
1358 const struct smb_filename *smb_fname,
1359 uint64_t *bsize,
1360 uint64_t *dfree,
1361 uint64_t *dsize)
1362 {
1363 VFS_FIND(disk_free);
1364 return handle->fns->disk_free_fn(handle, smb_fname,
1365 bsize, dfree, dsize);
1366 }
1367
1368 int smb_vfs_call_get_quota(struct vfs_handle_struct *handle,
1369 const struct smb_filename *smb_fname,
1370 enum SMB_QUOTA_TYPE qtype,
1371 unid_t id,
1372 SMB_DISK_QUOTA *qt)
1373 {
1374 VFS_FIND(get_quota);
1375 return handle->fns->get_quota_fn(handle, smb_fname, qtype, id, qt);
1376 }
1377
1378 int smb_vfs_call_set_quota(struct vfs_handle_struct *handle,
1379 enum SMB_QUOTA_TYPE qtype, unid_t id,
1380 SMB_DISK_QUOTA *qt)
1381 {
1382 VFS_FIND(set_quota);
1383 return handle->fns->set_quota_fn(handle, qtype, id, qt);
1384 }
1385
1386 int smb_vfs_call_get_shadow_copy_data(struct vfs_handle_struct *handle,
1387 struct files_struct *fsp,
1388 struct shadow_copy_data *shadow_copy_data,
1389 bool labels)
1390 {
1391 VFS_FIND(get_shadow_copy_data);
1392 return handle->fns->get_shadow_copy_data_fn(handle, fsp,
1393 shadow_copy_data,
1394 labels);
1395 }
1396 int smb_vfs_call_statvfs(struct vfs_handle_struct *handle,
1397 const struct smb_filename *smb_fname,
1398 struct vfs_statvfs_struct *statbuf)
1399 {
1400 VFS_FIND(statvfs);
1401 return handle->fns->statvfs_fn(handle, smb_fname, statbuf);
1402 }
1403
1404 uint32_t smb_vfs_call_fs_capabilities(struct vfs_handle_struct *handle,
1405 enum timestamp_set_resolution *p_ts_res)
1406 {
1407 VFS_FIND(fs_capabilities);
1408 return handle->fns->fs_capabilities_fn(handle, p_ts_res);
1409 }
1410
1411 NTSTATUS smb_vfs_call_get_dfs_referrals(struct vfs_handle_struct *handle,
1412 struct dfs_GetDFSReferral *r)
1413 {
1414 VFS_FIND(get_dfs_referrals);
1415 return handle->fns->get_dfs_referrals_fn(handle, r);
1416 }
1417
1418 NTSTATUS smb_vfs_call_create_dfs_pathat(struct vfs_handle_struct *handle,
1419 struct files_struct *dirfsp,
1420 const struct smb_filename *smb_fname,
1421 const struct referral *reflist,
1422 size_t referral_count)
1423 {
1424 VFS_FIND(create_dfs_pathat);
1425 return handle->fns->create_dfs_pathat_fn(handle,
1426 dirfsp,
1427 smb_fname,
1428 reflist,
1429 referral_count);
1430 }
1431
1432 NTSTATUS smb_vfs_call_read_dfs_pathat(struct vfs_handle_struct *handle,
1433 TALLOC_CTX *mem_ctx,
1434 struct files_struct *dirfsp,
1435 struct smb_filename *smb_fname,
1436 struct referral **ppreflist,
1437 size_t *preferral_count)
1438 {
1439 VFS_FIND(read_dfs_pathat);
1440 return handle->fns->read_dfs_pathat_fn(handle,
1441 mem_ctx,
1442 dirfsp,
1443 smb_fname,
1444 ppreflist,
1445 preferral_count);
1446 }
1447
1448 DIR *smb_vfs_call_fdopendir(struct vfs_handle_struct *handle,
1449 struct files_struct *fsp,
1450 const char *mask,
1451 uint32_t attributes)
1452 {
1453 VFS_FIND(fdopendir);
1454 return handle->fns->fdopendir_fn(handle, fsp, mask, attributes);
1455 }
1456
1457 struct dirent *smb_vfs_call_readdir(struct vfs_handle_struct *handle,
1458 struct files_struct *dirfsp,
1459 DIR *dirp)
1460 {
1461 VFS_FIND(readdir);
1462 return handle->fns->readdir_fn(handle, dirfsp, dirp);
1463 }
1464
1465 void smb_vfs_call_rewind_dir(struct vfs_handle_struct *handle,
1466 DIR *dirp)
1467 {
1468 VFS_FIND(rewind_dir);
1469 handle->fns->rewind_dir_fn(handle, dirp);
1470 }
1471
1472 int smb_vfs_call_mkdirat(struct vfs_handle_struct *handle,
1473 struct files_struct *dirfsp,
1474 const struct smb_filename *smb_fname,
1475 mode_t mode)
1476 {
1477 VFS_FIND(mkdirat);
1478 return handle->fns->mkdirat_fn(handle,
1479 dirfsp,
1480 smb_fname,
1481 mode);
1482 }
1483
1484 int smb_vfs_call_closedir(struct vfs_handle_struct *handle,
1485 DIR *dir)
1486 {
1487 VFS_FIND(closedir);
1488 return handle->fns->closedir_fn(handle, dir);
1489 }
1490
1491 int smb_vfs_call_openat(struct vfs_handle_struct *handle,
1492 const struct files_struct *dirfsp,
1493 const struct smb_filename *smb_fname,
1494 struct files_struct *fsp,
1495 const struct vfs_open_how *how)
1496 {
1497 VFS_FIND(openat);
1498 return handle->fns->openat_fn(handle,
1499 dirfsp,
1500 smb_fname,
1501 fsp,
1502 how);
1503 }
1504
1505 NTSTATUS smb_vfs_call_create_file(struct vfs_handle_struct *handle,
1506 struct smb_request *req,
1507 struct files_struct *dirfsp,
1508 struct smb_filename *smb_fname,
1509 uint32_t access_mask,
1510 uint32_t share_access,
1511 uint32_t create_disposition,
1512 uint32_t create_options,
1513 uint32_t file_attributes,
1514 uint32_t oplock_request,
1515 const struct smb2_lease *lease,
1516 uint64_t allocation_size,
1517 uint32_t private_flags,
1518 struct security_descriptor *sd,
1519 struct ea_list *ea_list,
1520 files_struct **result,
1521 int *pinfo,
1522 const struct smb2_create_blobs *in_context_blobs,
1523 struct smb2_create_blobs *out_context_blobs)
1524 {
1525 VFS_FIND(create_file);
1526 return handle->fns->create_file_fn(
1527 handle, req, dirfsp, smb_fname,
1528 access_mask, share_access, create_disposition, create_options,
1529 file_attributes, oplock_request, lease, allocation_size,
1530 private_flags, sd, ea_list,
1531 result, pinfo, in_context_blobs, out_context_blobs);
1532 }
1533
1534 int smb_vfs_call_close(struct vfs_handle_struct *handle,
1535 struct files_struct *fsp)
1536 {
1537 VFS_FIND(close);
1538 return handle->fns->close_fn(handle, fsp);
1539 }
1540
1541 ssize_t smb_vfs_call_pread(struct vfs_handle_struct *handle,
1542 struct files_struct *fsp, void *data, size_t n,
1543 off_t offset)
1544 {
1545 VFS_FIND(pread);
1546 return handle->fns->pread_fn(handle, fsp, data, n, offset);
1547 }
1548
1549 struct smb_vfs_call_pread_state {
1550 ssize_t (*recv_fn)(struct tevent_req *req, struct vfs_aio_state *vfs_aio_state);
1551 ssize_t retval;
1552 struct vfs_aio_state vfs_aio_state;
1553 };
1554
1555 static void smb_vfs_call_pread_done(struct tevent_req *subreq);
1556
1557 struct tevent_req *smb_vfs_call_pread_send(struct vfs_handle_struct *handle,
1558 TALLOC_CTX *mem_ctx,
1559 struct tevent_context *ev,
1560 struct files_struct *fsp,
1561 void *data,
1562 size_t n, off_t offset)
1563 {
1564 struct tevent_req *req, *subreq;
1565 struct smb_vfs_call_pread_state *state;
1566
1567 req = tevent_req_create(mem_ctx, &state,
1568 struct smb_vfs_call_pread_state);
1569 if (req == NULL) {
1570 return NULL;
1571 }
1572 VFS_FIND(pread_send);
1573 state->recv_fn = handle->fns->pread_recv_fn;
1574
1575 subreq = handle->fns->pread_send_fn(handle, state, ev, fsp, data, n,
1576 offset);
1577 if (tevent_req_nomem(subreq, req)) {
1578 return tevent_req_post(req, ev);
1579 }
1580 tevent_req_set_callback(subreq, smb_vfs_call_pread_done, req);
1581 return req;
1582 }
1583
1584 static void smb_vfs_call_pread_done(struct tevent_req *subreq)
1585 {
1586 struct tevent_req *req = tevent_req_callback_data(
1587 subreq, struct tevent_req);
1588 struct smb_vfs_call_pread_state *state = tevent_req_data(
1589 req, struct smb_vfs_call_pread_state);
1590
1591 state->retval = state->recv_fn(subreq, &state->vfs_aio_state);
1592 TALLOC_FREE(subreq);
1593 if (state->retval == -1) {
1594 tevent_req_error(req, state->vfs_aio_state.error);
1595 return;
1596 }
1597 tevent_req_done(req);
1598 }
1599
1600 ssize_t SMB_VFS_PREAD_RECV(struct tevent_req *req,
1601 struct vfs_aio_state *vfs_aio_state)
1602 {
1603 struct smb_vfs_call_pread_state *state = tevent_req_data(
1604 req, struct smb_vfs_call_pread_state);
1605 ssize_t retval;
1606
1607 if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1608 tevent_req_received(req);
1609 return -1;
1610 }
1611 *vfs_aio_state = state->vfs_aio_state;
1612 retval = state->retval;
1613 tevent_req_received(req);
1614 return retval;
1615 }
1616
1617 ssize_t smb_vfs_call_pwrite(struct vfs_handle_struct *handle,
1618 struct files_struct *fsp, const void *data,
1619 size_t n, off_t offset)
1620 {
1621 VFS_FIND(pwrite);
1622 return handle->fns->pwrite_fn(handle, fsp, data, n, offset);
1623 }
1624
1625 struct smb_vfs_call_pwrite_state {
1626 ssize_t (*recv_fn)(struct tevent_req *req, struct vfs_aio_state *vfs_aio_state);
1627 ssize_t retval;
1628 struct vfs_aio_state vfs_aio_state;
1629 };
1630
1631 static void smb_vfs_call_pwrite_done(struct tevent_req *subreq);
1632
1633 struct tevent_req *smb_vfs_call_pwrite_send(struct vfs_handle_struct *handle,
1634 TALLOC_CTX *mem_ctx,
1635 struct tevent_context *ev,
1636 struct files_struct *fsp,
1637 const void *data,
1638 size_t n, off_t offset)
1639 {
1640 struct tevent_req *req, *subreq;
1641 struct smb_vfs_call_pwrite_state *state;
1642
1643 req = tevent_req_create(mem_ctx, &state,
1644 struct smb_vfs_call_pwrite_state);
1645 if (req == NULL) {
1646 return NULL;
1647 }
1648 VFS_FIND(pwrite_send);
1649 state->recv_fn = handle->fns->pwrite_recv_fn;
1650
1651 subreq = handle->fns->pwrite_send_fn(handle, state, ev, fsp, data, n,
1652 offset);
1653 if (tevent_req_nomem(subreq, req)) {
1654 return tevent_req_post(req, ev);
1655 }
1656 tevent_req_set_callback(subreq, smb_vfs_call_pwrite_done, req);
1657 return req;
1658 }
1659
1660 static void smb_vfs_call_pwrite_done(struct tevent_req *subreq)
1661 {
1662 struct tevent_req *req = tevent_req_callback_data(
1663 subreq, struct tevent_req);
1664 struct smb_vfs_call_pwrite_state *state = tevent_req_data(
1665 req, struct smb_vfs_call_pwrite_state);
1666
1667 state->retval = state->recv_fn(subreq, &state->vfs_aio_state);
1668 TALLOC_FREE(subreq);
1669 if (state->retval == -1) {
1670 tevent_req_error(req, state->vfs_aio_state.error);
1671 return;
1672 }
1673 tevent_req_done(req);
1674 }
1675
1676 ssize_t SMB_VFS_PWRITE_RECV(struct tevent_req *req,
1677 struct vfs_aio_state *vfs_aio_state)
1678 {
1679 struct smb_vfs_call_pwrite_state *state = tevent_req_data(
1680 req, struct smb_vfs_call_pwrite_state);
1681 ssize_t retval;
1682
1683 if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1684 tevent_req_received(req);
1685 return -1;
1686 }
1687 *vfs_aio_state = state->vfs_aio_state;
1688 retval = state->retval;
1689 tevent_req_received(req);
1690 return retval;
1691 }
1692
1693 off_t smb_vfs_call_lseek(struct vfs_handle_struct *handle,
1694 struct files_struct *fsp, off_t offset,
1695 int whence)
1696 {
1697 VFS_FIND(lseek);
1698 return handle->fns->lseek_fn(handle, fsp, offset, whence);
1699 }
1700
1701 ssize_t smb_vfs_call_sendfile(struct vfs_handle_struct *handle, int tofd,
1702 files_struct *fromfsp, const DATA_BLOB *header,
1703 off_t offset, size_t count)
1704 {
1705 VFS_FIND(sendfile);
1706 return handle->fns->sendfile_fn(handle, tofd, fromfsp, header, offset,
1707 count);
1708 }
1709
1710 ssize_t smb_vfs_call_recvfile(struct vfs_handle_struct *handle, int fromfd,
1711 files_struct *tofsp, off_t offset,
1712 size_t count)
1713 {
1714 VFS_FIND(recvfile);
1715 return handle->fns->recvfile_fn(handle, fromfd, tofsp, offset, count);
1716 }
1717
1718 int smb_vfs_call_renameat(struct vfs_handle_struct *handle,
1719 files_struct *srcfsp,
1720 const struct smb_filename *smb_fname_src,
1721 files_struct *dstfsp,
1722 const struct smb_filename *smb_fname_dst)
1723 {
1724 VFS_FIND(renameat);
1725 return handle->fns->renameat_fn(handle,
1726 srcfsp,
1727 smb_fname_src,
1728 dstfsp,
1729 smb_fname_dst);
1730 }
1731
1732 struct smb_vfs_call_fsync_state {
1733 int (*recv_fn)(struct tevent_req *req, struct vfs_aio_state *vfs_aio_state);
1734 int retval;
1735 struct vfs_aio_state vfs_aio_state;
1736 };
1737
1738 static void smb_vfs_call_fsync_done(struct tevent_req *subreq);
1739
1740 struct tevent_req *smb_vfs_call_fsync_send(struct vfs_handle_struct *handle,
1741 TALLOC_CTX *mem_ctx,
1742 struct tevent_context *ev,
1743 struct files_struct *fsp)
1744 {
1745 struct tevent_req *req, *subreq;
1746 struct smb_vfs_call_fsync_state *state;
1747
1748 req = tevent_req_create(mem_ctx, &state,
1749 struct smb_vfs_call_fsync_state);
1750 if (req == NULL) {
1751 return NULL;
1752 }
1753 VFS_FIND(fsync_send);
1754 state->recv_fn = handle->fns->fsync_recv_fn;
1755
1756 subreq = handle->fns->fsync_send_fn(handle, state, ev, fsp);
1757 if (tevent_req_nomem(subreq, req)) {
1758 return tevent_req_post(req, ev);
1759 }
1760 tevent_req_set_callback(subreq, smb_vfs_call_fsync_done, req);
1761 return req;
1762 }
1763
1764 static void smb_vfs_call_fsync_done(struct tevent_req *subreq)
1765 {
1766 struct tevent_req *req = tevent_req_callback_data(
1767 subreq, struct tevent_req);
1768 struct smb_vfs_call_fsync_state *state = tevent_req_data(
1769 req, struct smb_vfs_call_fsync_state);
1770
1771 state->retval = state->recv_fn(subreq, &state->vfs_aio_state);
1772 TALLOC_FREE(subreq);
1773 if (state->retval == -1) {
1774 tevent_req_error(req, state->vfs_aio_state.error);
1775 return;
1776 }
1777 tevent_req_done(req);
1778 }
1779
1780 int SMB_VFS_FSYNC_RECV(struct tevent_req *req, struct vfs_aio_state *vfs_aio_state)
1781 {
1782 struct smb_vfs_call_fsync_state *state = tevent_req_data(
1783 req, struct smb_vfs_call_fsync_state);
1784 ssize_t retval;
1785
1786 if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1787 tevent_req_received(req);
1788 return -1;
1789 }
1790 *vfs_aio_state = state->vfs_aio_state;
1791 retval = state->retval;
1792 tevent_req_received(req);
1793 return retval;
1794 }
1795
1796 /*
1797 * Synchronous version of fsync, built from backend
1798 * async VFS primitives. Uses a temporary sub-event
1799 * context (NOT NESTED).
1800 */
1801
1802 int smb_vfs_fsync_sync(files_struct *fsp)
1803 {
1804 TALLOC_CTX *frame = talloc_stackframe();
1805 struct tevent_req *req = NULL;
1806 struct vfs_aio_state aio_state = { 0 };
1807 int ret = -1;
1808 bool ok;
1809 struct tevent_context *ev = samba_tevent_context_init(frame);
1810
1811 if (ev == NULL) {
1812 goto out;
1813 }
1814
1815 req = SMB_VFS_FSYNC_SEND(talloc_tos(), ev, fsp);
1816 if (req == NULL) {
1817 goto out;
1818 }
1819
1820 ok = tevent_req_poll(req, ev);
1821 if (!ok) {
1822 goto out;
1823 }
1824
1825 ret = SMB_VFS_FSYNC_RECV(req, &aio_state);
1826
1827 out:
1828
1829 TALLOC_FREE(frame);
1830 if (aio_state.error != 0) {
1831 errno = aio_state.error;
1832 }
1833 return ret;
1834 }
1835
1836 int smb_vfs_call_stat(struct vfs_handle_struct *handle,
1837 struct smb_filename *smb_fname)
1838 {
1839 VFS_FIND(stat);
1840 return handle->fns->stat_fn(handle, smb_fname);
1841 }
1842
1843 int smb_vfs_call_fstat(struct vfs_handle_struct *handle,
1844 struct files_struct *fsp, SMB_STRUCT_STAT *sbuf)
1845 {
1846 VFS_FIND(fstat);
1847 return handle->fns->fstat_fn(handle, fsp, sbuf);
1848 }
1849
1850 int smb_vfs_call_lstat(struct vfs_handle_struct *handle,
1851 struct smb_filename *smb_filename)
1852 {
1853 VFS_FIND(lstat);
1854 return handle->fns->lstat_fn(handle, smb_filename);
1855 }
1856
1857 int smb_vfs_call_fstatat(
1858 struct vfs_handle_struct *handle,
1859 const struct files_struct *dirfsp,
1860 const struct smb_filename *smb_fname,
1861 SMB_STRUCT_STAT *sbuf,
1862 int flags)
1863 {
1864 VFS_FIND(fstatat);
1865 return handle->fns->fstatat_fn(handle, dirfsp, smb_fname, sbuf, flags);
1866 }
1867
1868 uint64_t smb_vfs_call_get_alloc_size(struct vfs_handle_struct *handle,
1869 struct files_struct *fsp,
1870 const SMB_STRUCT_STAT *sbuf)
1871 {
1872 VFS_FIND(get_alloc_size);
1873 return handle->fns->get_alloc_size_fn(handle, fsp, sbuf);
1874 }
1875
1876 int smb_vfs_call_unlinkat(struct vfs_handle_struct *handle,
1877 struct files_struct *dirfsp,
1878 const struct smb_filename *smb_fname,
1879 int flags)
1880 {
1881 VFS_FIND(unlinkat);
1882 return handle->fns->unlinkat_fn(handle,
1883 dirfsp,
1884 smb_fname,
1885 flags);
1886 }
1887
1888 int smb_vfs_call_fchmod(struct vfs_handle_struct *handle,
1889 struct files_struct *fsp, mode_t mode)
1890 {
1891 VFS_FIND(fchmod);
1892 return handle->fns->fchmod_fn(handle, fsp, mode);
1893 }
1894
1895 int smb_vfs_call_fchown(struct vfs_handle_struct *handle,
1896 struct files_struct *fsp, uid_t uid, gid_t gid)
1897 {
1898 VFS_FIND(fchown);
1899 return handle->fns->fchown_fn(handle, fsp, uid, gid);
1900 }
1901
1902 int smb_vfs_call_lchown(struct vfs_handle_struct *handle,
1903 const struct smb_filename *smb_fname,
1904 uid_t uid,
1905 gid_t gid)
1906 {
1907 VFS_FIND(lchown);
1908 return handle->fns->lchown_fn(handle, smb_fname, uid, gid);
1909 }
1910
1911 int smb_vfs_call_chdir(struct vfs_handle_struct *handle,
1912 const struct smb_filename *smb_fname)
1913 {
1914 VFS_FIND(chdir);
1915 return handle->fns->chdir_fn(handle, smb_fname);
1916 }
1917
1918 struct smb_filename *smb_vfs_call_getwd(struct vfs_handle_struct *handle,
1919 TALLOC_CTX *ctx)
1920 {
1921 VFS_FIND(getwd);
1922 return handle->fns->getwd_fn(handle, ctx);
1923 }
1924
1925 int smb_vfs_call_fntimes(struct vfs_handle_struct *handle,
1926 struct files_struct *fsp,
1927 struct smb_file_time *ft)
1928 {
1929 VFS_FIND(fntimes);
1930 return handle->fns->fntimes_fn(handle, fsp, ft);
1931 }
1932
1933 int smb_vfs_call_ftruncate(struct vfs_handle_struct *handle,
1934 struct files_struct *fsp, off_t offset)
1935 {
1936 VFS_FIND(ftruncate);
1937 return handle->fns->ftruncate_fn(handle, fsp, offset);
1938 }
1939
1940 int smb_vfs_call_fallocate(struct vfs_handle_struct *handle,
1941 struct files_struct *fsp,
1942 uint32_t mode,
1943 off_t offset,
1944 off_t len)
1945 {
1946 VFS_FIND(fallocate);
1947 return handle->fns->fallocate_fn(handle, fsp, mode, offset, len);
1948 }
1949
1950 int smb_vfs_call_filesystem_sharemode(struct vfs_handle_struct *handle,
1951 struct files_struct *fsp,
1952 uint32_t share_mode,
1953 uint32_t access_mask)
1954 {
1955 VFS_FIND(filesystem_sharemode);
1956 return handle->fns->filesystem_sharemode_fn(handle,
1957 fsp,
1958 share_mode,
1959 access_mask);
1960 }
1961
1962 int smb_vfs_call_fcntl(struct vfs_handle_struct *handle,
1963 struct files_struct *fsp, int cmd, ...)
1964 {
1965 int result;
1966 va_list cmd_arg;
1967
1968 VFS_FIND(fcntl);
1969
1970 va_start(cmd_arg, cmd);
1971 result = handle->fns->fcntl_fn(handle, fsp, cmd, cmd_arg);
1972 va_end(cmd_arg);
1973
1974 return result;
1975 }
1976
1977 int smb_vfs_call_linux_setlease(struct vfs_handle_struct *handle,
1978 struct files_struct *fsp, int leasetype)
1979 {
1980 VFS_FIND(linux_setlease);
1981 return handle->fns->linux_setlease_fn(handle, fsp, leasetype);
1982 }
1983
1984 int smb_vfs_call_symlinkat(struct vfs_handle_struct *handle,
1985 const struct smb_filename *link_target,
1986 struct files_struct *dirfsp,
1987 const struct smb_filename *new_smb_fname)
1988 {
1989 VFS_FIND(symlinkat);
1990 return handle->fns->symlinkat_fn(handle,
1991 link_target,
1992 dirfsp,
1993 new_smb_fname);
1994 }
1995
1996 int smb_vfs_call_readlinkat(struct vfs_handle_struct *handle,
1997 const struct files_struct *dirfsp,
1998 const struct smb_filename *smb_fname,
1999 char *buf,
2000 size_t bufsiz)
2001 {
2002 VFS_FIND(readlinkat);
2003 return handle->fns->readlinkat_fn(handle,
2004 dirfsp,
2005 smb_fname,
2006 buf,
2007 bufsiz);
2008 }
2009
2010 int smb_vfs_call_linkat(struct vfs_handle_struct *handle,
2011 struct files_struct *srcfsp,
2012 const struct smb_filename *old_smb_fname,
2013 struct files_struct *dstfsp,
2014 const struct smb_filename *new_smb_fname,
2015 int flags)
2016 {
2017 VFS_FIND(linkat);
2018 return handle->fns->linkat_fn(handle,
2019 srcfsp,
2020 old_smb_fname,
2021 dstfsp,
2022 new_smb_fname,
2023 flags);
2024 }
2025
2026 int smb_vfs_call_mknodat(struct vfs_handle_struct *handle,
2027 struct files_struct *dirfsp,
2028 const struct smb_filename *smb_fname,
2029 mode_t mode,
2030 SMB_DEV_T dev)
2031 {
2032 VFS_FIND(mknodat);
2033 return handle->fns->mknodat_fn(handle,
2034 dirfsp,
2035 smb_fname,
2036 mode,
2037 dev);
2038 }
2039
2040 struct smb_filename *smb_vfs_call_realpath(struct vfs_handle_struct *handle,
2041 TALLOC_CTX *ctx,
2042 const struct smb_filename *smb_fname)
2043 {
2044 VFS_FIND(realpath);
2045 return handle->fns->realpath_fn(handle, ctx, smb_fname);
2046 }
2047
2048 int smb_vfs_call_fchflags(struct vfs_handle_struct *handle,
2049 struct files_struct *fsp,
2050 unsigned int flags)
2051 {
2052 VFS_FIND(fchflags);
2053 return handle->fns->fchflags_fn(handle, fsp, flags);
2054 }
2055
2056 struct file_id smb_vfs_call_file_id_create(struct vfs_handle_struct *handle,
2057 const SMB_STRUCT_STAT *sbuf)
2058 {
2059 VFS_FIND(file_id_create);
2060 return handle->fns->file_id_create_fn(handle, sbuf);
2061 }
2062
2063 uint64_t smb_vfs_call_fs_file_id(struct vfs_handle_struct *handle,
2064 const SMB_STRUCT_STAT *sbuf)
2065 {
2066 VFS_FIND(fs_file_id);
2067 return handle->fns->fs_file_id_fn(handle, sbuf);
2068 }
2069
2070 NTSTATUS smb_vfs_call_fstreaminfo(struct vfs_handle_struct *handle,
2071 struct files_struct *fsp,
2072 TALLOC_CTX *mem_ctx,
2073 unsigned int *num_streams,
2074 struct stream_struct **streams)
2075 {
2076 VFS_FIND(fstreaminfo);
2077 return handle->fns->fstreaminfo_fn(handle, fsp, mem_ctx,
2078 num_streams, streams);
2079 }
2080
2081 NTSTATUS smb_vfs_call_get_real_filename_at(struct vfs_handle_struct *handle,
2082 struct files_struct *dirfsp,
2083 const char *name,
2084 TALLOC_CTX *mem_ctx,
2085 char **found_name)
2086 {
2087 VFS_FIND(get_real_filename_at);
2088 return handle->fns->get_real_filename_at_fn(
2089 handle, dirfsp, name, mem_ctx, found_name);
2090 }
2091
2092 const char *smb_vfs_call_connectpath(struct vfs_handle_struct *handle,
2093 const struct files_struct *dirfsp,
2094 const struct smb_filename *smb_fname)
2095 {
2096 VFS_FIND(connectpath);
2097 return handle->fns->connectpath_fn(handle, dirfsp, smb_fname);
2098 }
2099
2100 bool smb_vfs_call_strict_lock_check(struct vfs_handle_struct *handle,
2101 struct files_struct *fsp,
2102 struct lock_struct *plock)
2103 {
2104 VFS_FIND(strict_lock_check);
2105 return handle->fns->strict_lock_check_fn(handle, fsp, plock);
2106 }
2107
2108 NTSTATUS smb_vfs_call_translate_name(struct vfs_handle_struct *handle,
2109 const char *name,
2110 enum vfs_translate_direction direction,
2111 TALLOC_CTX *mem_ctx,
2112 char **mapped_name)
2113 {
2114 VFS_FIND(translate_name);
2115 return handle->fns->translate_name_fn(handle, name, direction, mem_ctx,
2116 mapped_name);
2117 }
2118
2119 NTSTATUS smb_vfs_call_parent_pathname(struct vfs_handle_struct *handle,
2120 TALLOC_CTX *mem_ctx,
2121 const struct smb_filename *smb_fname_in,
2122 struct smb_filename **parent_dir_out,
2123 struct smb_filename **atname_out)
2124 {
2125 VFS_FIND(parent_pathname);
2126 return handle->fns->parent_pathname_fn(handle,
2127 mem_ctx,
2128 smb_fname_in,
2129 parent_dir_out,
2130 atname_out);
2131 }
2132
2133 NTSTATUS smb_vfs_call_fsctl(struct vfs_handle_struct *handle,
2134 struct files_struct *fsp,
2135 TALLOC_CTX *ctx,
2136 uint32_t function,
2137 uint16_t req_flags,
2138 const uint8_t *in_data,
2139 uint32_t in_len,
2140 uint8_t **out_data,
2141 uint32_t max_out_len,
2142 uint32_t *out_len)
2143 {
2144 VFS_FIND(fsctl);
2145 return handle->fns->fsctl_fn(handle, fsp, ctx, function, req_flags,
2146 in_data, in_len, out_data, max_out_len,
2147 out_len);
2148 }
2149
2150 NTSTATUS smb_vfs_call_fget_dos_attributes(struct vfs_handle_struct *handle,
2151 struct files_struct *fsp,
2152 uint32_t *dosmode)
2153 {
2154 VFS_FIND(fget_dos_attributes);
2155 return handle->fns->fget_dos_attributes_fn(handle, fsp, dosmode);
2156 }
2157
2158 NTSTATUS smb_vfs_call_fset_dos_attributes(struct vfs_handle_struct *handle,
2159 struct files_struct *fsp,
2160 uint32_t dosmode)
2161 {
2162 VFS_FIND(fset_dos_attributes);
2163 return handle->fns->fset_dos_attributes_fn(handle, fsp, dosmode);
2164 }
2165
2166 struct tevent_req *smb_vfs_call_offload_read_send(TALLOC_CTX *mem_ctx,
2167 struct tevent_context *ev,
2168 struct vfs_handle_struct *handle,
2169 struct files_struct *fsp,
2170 uint32_t fsctl,
2171 uint32_t ttl,
2172 off_t offset,
2173 size_t to_copy)
2174 {
2175 VFS_FIND(offload_read_send);
2176 return handle->fns->offload_read_send_fn(mem_ctx, ev, handle,
2177 fsp, fsctl,
2178 ttl, offset, to_copy);
2179 }
2180
2181 NTSTATUS smb_vfs_call_offload_read_recv(struct tevent_req *req,
2182 struct vfs_handle_struct *handle,
2183 TALLOC_CTX *mem_ctx,
2184 uint32_t *flags,
2185 uint64_t *xferlen,
2186 DATA_BLOB *token_blob)
2187 {
2188 VFS_FIND(offload_read_recv);
2189 return handle->fns->offload_read_recv_fn(req, handle, mem_ctx, flags, xferlen, token_blob);
2190 }
2191
2192 struct tevent_req *smb_vfs_call_offload_write_send(struct vfs_handle_struct *handle,
2193 TALLOC_CTX *mem_ctx,
2194 struct tevent_context *ev,
2195 uint32_t fsctl,
2196 DATA_BLOB *token,
2197 off_t transfer_offset,
2198 struct files_struct *dest_fsp,
2199 off_t dest_off,
2200 off_t num)
2201 {
2202 VFS_FIND(offload_write_send);
2203 return handle->fns->offload_write_send_fn(handle, mem_ctx, ev, fsctl,
2204 token, transfer_offset,
2205 dest_fsp, dest_off, num);
2206 }
2207
2208 NTSTATUS smb_vfs_call_offload_write_recv(struct vfs_handle_struct *handle,
2209 struct tevent_req *req,
2210 off_t *copied)
2211 {
2212 VFS_FIND(offload_write_recv);
2213 return handle->fns->offload_write_recv_fn(handle, req, copied);
2214 }
2215
2216 struct smb_vfs_call_get_dos_attributes_state {
2217 files_struct *dir_fsp;
2218 NTSTATUS (*recv_fn)(struct tevent_req *req,
2219 struct vfs_aio_state *aio_state,
2220 uint32_t *dosmode);
2221 struct vfs_aio_state aio_state;
2222 uint32_t dos_attributes;
2223 };
2224
2225 static void smb_vfs_call_get_dos_attributes_done(struct tevent_req *subreq);
2226
2227 struct tevent_req *smb_vfs_call_get_dos_attributes_send(
2228 TALLOC_CTX *mem_ctx,
2229 struct tevent_context *ev,
2230 struct vfs_handle_struct *handle,
2231 files_struct *dir_fsp,
2232 struct smb_filename *smb_fname)
2233 {
2234 struct tevent_req *req = NULL;
2235 struct smb_vfs_call_get_dos_attributes_state *state = NULL;
2236 struct tevent_req *subreq = NULL;
2237
2238 req = tevent_req_create(mem_ctx, &state,
2239 struct smb_vfs_call_get_dos_attributes_state);
2240 if (req == NULL) {
2241 return NULL;
2242 }
2243
2244 VFS_FIND(get_dos_attributes_send);
2245
2246 *state = (struct smb_vfs_call_get_dos_attributes_state) {
2247 .dir_fsp = dir_fsp,
2248 .recv_fn = handle->fns->get_dos_attributes_recv_fn,
2249 };
2250
2251 subreq = handle->fns->get_dos_attributes_send_fn(mem_ctx,
2252 ev,
2253 handle,
2254 dir_fsp,
2255 smb_fname);
2256 if (tevent_req_nomem(subreq, req)) {
2257 return tevent_req_post(req, ev);
2258 }
2259 tevent_req_defer_callback(req, ev);
2260
2261 tevent_req_set_callback(subreq,
2262 smb_vfs_call_get_dos_attributes_done,
2263 req);
2264
2265 return req;
2266 }
2267
2268 static void smb_vfs_call_get_dos_attributes_done(struct tevent_req *subreq)
2269 {
2270 struct tevent_req *req =
2271 tevent_req_callback_data(subreq,
2272 struct tevent_req);
2273 struct smb_vfs_call_get_dos_attributes_state *state =
2274 tevent_req_data(req,
2275 struct smb_vfs_call_get_dos_attributes_state);
2276 NTSTATUS status;
2277 bool ok;
2278
2279 /*
2280 * Make sure we run as the user again
2281 */
2282 ok = change_to_user_and_service_by_fsp(state->dir_fsp);
2283 SMB_ASSERT(ok);
2284
2285 status = state->recv_fn(subreq,
2286 &state->aio_state,
2287 &state->dos_attributes);
2288 TALLOC_FREE(subreq);
2289 if (tevent_req_nterror(req, status)) {
2290 return;
2291 }
2292
2293 tevent_req_done(req);
2294 }
2295
2296 NTSTATUS smb_vfs_call_get_dos_attributes_recv(
2297 struct tevent_req *req,
2298 struct vfs_aio_state *aio_state,
2299 uint32_t *dos_attributes)
2300 {
2301 struct smb_vfs_call_get_dos_attributes_state *state =
2302 tevent_req_data(req,
2303 struct smb_vfs_call_get_dos_attributes_state);
2304 NTSTATUS status;
2305
2306 if (tevent_req_is_nterror(req, &status)) {
2307 tevent_req_received(req);
2308 return status;
2309 }
2310
2311 *aio_state = state->aio_state;
2312 *dos_attributes = state->dos_attributes;
2313 tevent_req_received(req);
2314 return NT_STATUS_OK;
2315 }
2316
2317 NTSTATUS smb_vfs_call_fget_compression(vfs_handle_struct *handle,
2318 TALLOC_CTX *mem_ctx,
2319 struct files_struct *fsp,
2320 uint16_t *_compression_fmt)
2321 {
2322 VFS_FIND(fget_compression);
2323 return handle->fns->fget_compression_fn(handle, mem_ctx, fsp,
2324 _compression_fmt);
2325 }
2326
2327 NTSTATUS smb_vfs_call_set_compression(vfs_handle_struct *handle,
2328 TALLOC_CTX *mem_ctx,
2329 struct files_struct *fsp,
2330 uint16_t compression_fmt)
2331 {
2332 VFS_FIND(set_compression);
2333 return handle->fns->set_compression_fn(handle, mem_ctx, fsp,
2334 compression_fmt);
2335 }
2336
2337 NTSTATUS smb_vfs_call_snap_check_path(vfs_handle_struct *handle,
2338 TALLOC_CTX *mem_ctx,
2339 const char *service_path,
2340 char **base_volume)
2341 {
2342 VFS_FIND(snap_check_path);
2343 return handle->fns->snap_check_path_fn(handle, mem_ctx, service_path,
2344 base_volume);
2345 }
2346
2347 NTSTATUS smb_vfs_call_snap_create(struct vfs_handle_struct *handle,
2348 TALLOC_CTX *mem_ctx,
2349 const char *base_volume,
2350 time_t *tstamp,
2351 bool rw,
2352 char **base_path,
2353 char **snap_path)
2354 {
2355 VFS_FIND(snap_create);
2356 return handle->fns->snap_create_fn(handle, mem_ctx, base_volume, tstamp,
2357 rw, base_path, snap_path);
2358 }
2359
2360 NTSTATUS smb_vfs_call_snap_delete(struct vfs_handle_struct *handle,
2361 TALLOC_CTX *mem_ctx,
2362 char *base_path,
2363 char *snap_path)
2364 {
2365 VFS_FIND(snap_delete);
2366 return handle->fns->snap_delete_fn(handle, mem_ctx, base_path,
2367 snap_path);
2368 }
2369
2370 NTSTATUS smb_vfs_call_fget_nt_acl(struct vfs_handle_struct *handle,
2371 struct files_struct *fsp,
2372 uint32_t security_info,
2373 TALLOC_CTX *mem_ctx,
2374 struct security_descriptor **ppdesc)
2375 {
2376 VFS_FIND(fget_nt_acl);
2377 return handle->fns->fget_nt_acl_fn(handle, fsp, security_info,
2378 mem_ctx, ppdesc);
2379 }
2380
2381 NTSTATUS smb_vfs_call_fset_nt_acl(struct vfs_handle_struct *handle,
2382 struct files_struct *fsp,
2383 uint32_t security_info_sent,
2384 const struct security_descriptor *psd)
2385 {
2386 VFS_FIND(fset_nt_acl);
2387 return handle->fns->fset_nt_acl_fn(handle, fsp, security_info_sent,
2388 psd);
2389 }
2390
2391 NTSTATUS smb_vfs_call_audit_file(struct vfs_handle_struct *handle,
2392 struct smb_filename *file,
2393 struct security_acl *sacl,
2394 uint32_t access_requested,
2395 uint32_t access_denied)
2396 {
2397 VFS_FIND(audit_file);
2398 return handle->fns->audit_file_fn(handle,
2399 file,
2400 sacl,
2401 access_requested,
2402 access_denied);
2403 }
2404
2405 SMB_ACL_T smb_vfs_call_sys_acl_get_fd(struct vfs_handle_struct *handle,
2406 struct files_struct *fsp,
2407 SMB_ACL_TYPE_T type,
2408 TALLOC_CTX *mem_ctx)
2409 {
2410 VFS_FIND(sys_acl_get_fd);
2411 return handle->fns->sys_acl_get_fd_fn(handle, fsp, type, mem_ctx);
2412 }
2413
2414 int smb_vfs_call_sys_acl_blob_get_fd(struct vfs_handle_struct *handle,
2415 struct files_struct *fsp,
2416 TALLOC_CTX *mem_ctx,
2417 char **blob_description,
2418 DATA_BLOB *blob)
2419 {
2420 VFS_FIND(sys_acl_blob_get_fd);
2421 return handle->fns->sys_acl_blob_get_fd_fn(handle, fsp, mem_ctx, blob_description, blob);
2422 }
2423
2424 int smb_vfs_call_sys_acl_set_fd(struct vfs_handle_struct *handle,
2425 struct files_struct *fsp,
2426 SMB_ACL_TYPE_T type,
2427 SMB_ACL_T theacl)
2428 {
2429 VFS_FIND(sys_acl_set_fd);
2430 return handle->fns->sys_acl_set_fd_fn(handle, fsp, type, theacl);
2431 }
2432
2433 int smb_vfs_call_sys_acl_delete_def_fd(struct vfs_handle_struct *handle,
2434 struct files_struct *fsp)
2435 {
2436 VFS_FIND(sys_acl_delete_def_fd);
2437 return handle->fns->sys_acl_delete_def_fd_fn(handle, fsp);
2438 }
2439
2440 struct smb_vfs_call_getxattrat_state {
2441 files_struct *dir_fsp;
2442 ssize_t (*recv_fn)(struct tevent_req *req,
2443 struct vfs_aio_state *aio_state,
2444 TALLOC_CTX *mem_ctx,
2445 uint8_t **xattr_value);
2446 ssize_t retval;
2447 uint8_t *xattr_value;
2448 struct vfs_aio_state aio_state;
2449 };
2450
2451 static void smb_vfs_call_getxattrat_done(struct tevent_req *subreq);
2452
2453 struct tevent_req *smb_vfs_call_getxattrat_send(
2454 TALLOC_CTX *mem_ctx,
2455 struct tevent_context *ev,
2456 struct vfs_handle_struct *handle,
2457 files_struct *dir_fsp,
2458 const struct smb_filename *smb_fname,
2459 const char *xattr_name,
2460 size_t alloc_hint)
2461 {
2462 struct tevent_req *req = NULL;
2463 struct smb_vfs_call_getxattrat_state *state = NULL;
2464 struct tevent_req *subreq = NULL;
2465
2466 req = tevent_req_create(mem_ctx, &state,
2467 struct smb_vfs_call_getxattrat_state);
2468 if (req == NULL) {
2469 return NULL;
2470 }
2471
2472 VFS_FIND(getxattrat_send);
2473
2474 *state = (struct smb_vfs_call_getxattrat_state) {
2475 .dir_fsp = dir_fsp,
2476 .recv_fn = handle->fns->getxattrat_recv_fn,
2477 };
2478
2479 subreq = handle->fns->getxattrat_send_fn(mem_ctx,
2480 ev,
2481 handle,
2482 dir_fsp,
2483 smb_fname,
2484 xattr_name,
2485 alloc_hint);
2486 if (tevent_req_nomem(subreq, req)) {
2487 return tevent_req_post(req, ev);
2488 }
2489 tevent_req_defer_callback(req, ev);
2490
2491 tevent_req_set_callback(subreq, smb_vfs_call_getxattrat_done, req);
2492 return req;
2493 }
2494
2495 static void smb_vfs_call_getxattrat_done(struct tevent_req *subreq)
2496 {
2497 struct tevent_req *req = tevent_req_callback_data(
2498 subreq, struct tevent_req);
2499 struct smb_vfs_call_getxattrat_state *state = tevent_req_data(
2500 req, struct smb_vfs_call_getxattrat_state);
2501 bool ok;
2502
2503 /*
2504 * Make sure we run as the user again
2505 */
2506 ok = change_to_user_and_service_by_fsp(state->dir_fsp);
2507 SMB_ASSERT(ok);
2508
2509 state->retval = state->recv_fn(subreq,
2510 &state->aio_state,
2511 state,
2512 &state->xattr_value);
2513 TALLOC_FREE(subreq);
2514 if (state->retval == -1) {
2515 tevent_req_error(req, state->aio_state.error);
2516 return;
2517 }
2518
2519 tevent_req_done(req);
2520 }
2521
2522 ssize_t smb_vfs_call_getxattrat_recv(struct tevent_req *req,
2523 struct vfs_aio_state *aio_state,
2524 TALLOC_CTX *mem_ctx,
2525 uint8_t **xattr_value)
2526 {
2527 struct smb_vfs_call_getxattrat_state *state = tevent_req_data(
2528 req, struct smb_vfs_call_getxattrat_state);
2529 size_t xattr_size;
2530
2531 if (tevent_req_is_unix_error(req, &aio_state->error)) {
2532 tevent_req_received(req);
2533 return -1;
2534 }
2535
2536 *aio_state = state->aio_state;
2537 xattr_size = state->retval;
2538 if (xattr_value != NULL) {
2539 *xattr_value = talloc_move(mem_ctx, &state->xattr_value);
2540 }
2541
2542 tevent_req_received(req);
2543 return xattr_size;
2544 }
2545
2546 ssize_t smb_vfs_call_fgetxattr(struct vfs_handle_struct *handle,
2547 struct files_struct *fsp, const char *name,
2548 void *value, size_t size)
2549 {
2550 VFS_FIND(fgetxattr);
2551 return handle->fns->fgetxattr_fn(handle, fsp, name, value, size);
2552 }
2553
2554 ssize_t smb_vfs_call_flistxattr(struct vfs_handle_struct *handle,
2555 struct files_struct *fsp, char *list,
2556 size_t size)
2557 {
2558 VFS_FIND(flistxattr);
2559 return handle->fns->flistxattr_fn(handle, fsp, list, size);
2560 }
2561
2562 int smb_vfs_call_fremovexattr(struct vfs_handle_struct *handle,
2563 struct files_struct *fsp, const char *name)
2564 {
2565 VFS_FIND(fremovexattr);
2566 return handle->fns->fremovexattr_fn(handle, fsp, name);
2567 }
2568
2569 int smb_vfs_call_fsetxattr(struct vfs_handle_struct *handle,
2570 struct files_struct *fsp, const char *name,
2571 const void *value, size_t size, int flags)
2572 {
2573 VFS_FIND(fsetxattr);
2574 return handle->fns->fsetxattr_fn(handle, fsp, name, value, size, flags);
2575 }
2576
2577 bool smb_vfs_call_aio_force(struct vfs_handle_struct *handle,
2578 struct files_struct *fsp)
2579 {
2580 VFS_FIND(aio_force);
2581 return handle->fns->aio_force_fn(handle, fsp);
2582 }
2583
2584 NTSTATUS smb_vfs_call_durable_cookie(struct vfs_handle_struct *handle,
2585 struct files_struct *fsp,
2586 TALLOC_CTX *mem_ctx,
2587 DATA_BLOB *cookie)
2588 {
2589 VFS_FIND(durable_cookie);
2590 return handle->fns->durable_cookie_fn(handle, fsp, mem_ctx, cookie);
2591 }
2592
2593 NTSTATUS smb_vfs_call_durable_disconnect(struct vfs_handle_struct *handle,
2594 struct files_struct *fsp,
2595 const DATA_BLOB old_cookie,
2596 TALLOC_CTX *mem_ctx,
2597 DATA_BLOB *new_cookie)
2598 {
2599 VFS_FIND(durable_disconnect);
2600 return handle->fns->durable_disconnect_fn(handle, fsp, old_cookie,
2601 mem_ctx, new_cookie);
2602 }
2603
2604 NTSTATUS smb_vfs_call_durable_reconnect(struct vfs_handle_struct *handle,
2605 struct smb_request *smb1req,
2606 struct smbXsrv_open *op,
2607 const DATA_BLOB old_cookie,
2608 TALLOC_CTX *mem_ctx,
2609 struct files_struct **fsp,
2610 DATA_BLOB *new_cookie)
2611 {
2612 VFS_FIND(durable_reconnect);
2613 return handle->fns->durable_reconnect_fn(handle, smb1req, op,
2614 old_cookie, mem_ctx, fsp,
2615 new_cookie);
2616 }
2617
2618 NTSTATUS smb_vfs_call_freaddir_attr(struct vfs_handle_struct *handle,
2619 struct files_struct *fsp,
2620 TALLOC_CTX *mem_ctx,
2621 struct readdir_attr_data **attr_data)
2622 {
2623 VFS_FIND(freaddir_attr);
2624 return handle->fns->freaddir_attr_fn(handle,
2625 fsp,
2626 mem_ctx,
2627 attr_data);
2628 }
2629
2630 bool smb_vfs_call_lock(struct vfs_handle_struct *handle,
2631 struct files_struct *fsp, int op, off_t offset,
2632 off_t count, int type)
2633 {
2634 VFS_FIND(lock);
2635 return handle->fns->lock_fn(handle, fsp, op, offset, count, type);
2636 }
2637
2638 bool smb_vfs_call_getlock(struct vfs_handle_struct *handle,
2639 struct files_struct *fsp, off_t *poffset,
2640 off_t *pcount, int *ptype, pid_t *ppid)
2641 {
2642 VFS_FIND(getlock);
2643 return handle->fns->getlock_fn(handle, fsp, poffset, pcount, ptype,
2644 ppid);
2645 }
2646
2647 NTSTATUS smb_vfs_call_brl_lock_windows(struct vfs_handle_struct *handle,
2648 struct byte_range_lock *br_lck,
2649 struct lock_struct *plock)
2650 {
2651 VFS_FIND(brl_lock_windows);
2652 return handle->fns->brl_lock_windows_fn(handle, br_lck, plock);
2653 }
2654
2655 bool smb_vfs_call_brl_unlock_windows(struct vfs_handle_struct *handle,
2656 struct byte_range_lock *br_lck,
2657 const struct lock_struct *plock)
2658 {
2659 VFS_FIND(brl_unlock_windows);
2660 return handle->fns->brl_unlock_windows_fn(handle, br_lck, plock);
2661 }
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