?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
wafsamba: remove unused variable from copy_and_fix_python_path
[Samba.git] / source3 / modules / vfs_shadow_copy2.c
blobfca05cf7ab91aab6dd2e5ab6d9f93b8dcb347383
1 /*
2 * shadow_copy2: a shadow copy module (second implementation)
3 *
4 * Copyright (C) Andrew Tridgell 2007 (portions taken from shadow_copy2)
5 * Copyright (C) Ed Plese 2009
6 * Copyright (C) Volker Lendecke 2011
7 * Copyright (C) Christian Ambach 2011
8 * Copyright (C) Michael Adam 2013
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 2 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, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 */
24
25 /*
26 * This is a second implemetation of a shadow copy module for exposing
27 * file system snapshots to windows clients as shadow copies.
28 *
29 * See the manual page for documentation.
30 */
31
32 #include "includes.h"
33 #include "system/filesys.h"
34 #include "include/ntioctl.h"
35 #include <ccan/hash/hash.h>
36 #include "util_tdb.h"
37
38 struct shadow_copy2_config {
39 char *gmt_format;
40 bool use_sscanf;
41 bool use_localtime;
42 char *snapdir;
43 bool snapdirseverywhere;
44 bool crossmountpoints;
45 bool fixinodes;
46 char *sort_order;
47 bool snapdir_absolute;
48 char *basedir;
49 char *mount_point;
50 char *rel_connectpath; /* share root, relative to the basedir */
51 char *snapshot_basepath; /* the absolute version of snapdir */
52 };
53
54 static bool shadow_copy2_find_slashes(TALLOC_CTX *mem_ctx, const char *str,
55 size_t **poffsets,
56 unsigned *pnum_offsets)
57 {
58 unsigned num_offsets;
59 size_t *offsets;
60 const char *p;
61
62 num_offsets = 0;
63
64 p = str;
65 while ((p = strchr(p, '/')) != NULL) {
66 num_offsets += 1;
67 p += 1;
68 }
69
70 offsets = talloc_array(mem_ctx, size_t, num_offsets);
71 if (offsets == NULL) {
72 return false;
73 }
74
75 p = str;
76 num_offsets = 0;
77 while ((p = strchr(p, '/')) != NULL) {
78 offsets[num_offsets] = p-str;
79 num_offsets += 1;
80 p += 1;
81 }
82
83 *poffsets = offsets;
84 *pnum_offsets = num_offsets;
85 return true;
86 }
87
88 /**
89 * Given a timstamp, build the posix level GTM-tag string
90 * based on the configurable format.
91 */
92 static size_t shadow_copy2_posix_gmt_string(struct vfs_handle_struct *handle,
93 time_t snapshot,
94 char *snaptime_string,
95 size_t len)
96 {
97 struct tm snap_tm;
98 size_t snaptime_len;
99 struct shadow_copy2_config *config;
100
101 SMB_VFS_HANDLE_GET_DATA(handle, config, struct shadow_copy2_config,
102 return 0);
103
104 if (config->use_sscanf) {
105 snaptime_len = snprintf(snaptime_string,
106 len,
107 config->gmt_format,
108 (unsigned long)snapshot);
109 if (snaptime_len <= 0) {
110 DEBUG(10, ("snprintf failed\n"));
111 return snaptime_len;
112 }
113 } else {
114 if (config->use_localtime) {
115 if (localtime_r(&snapshot, &snap_tm) == 0) {
116 DEBUG(10, ("gmtime_r failed\n"));
117 return -1;
118 }
119 } else {
120 if (gmtime_r(&snapshot, &snap_tm) == 0) {
121 DEBUG(10, ("gmtime_r failed\n"));
122 return -1;
123 }
124 }
125 snaptime_len = strftime(snaptime_string,
126 len,
127 config->gmt_format,
128 &snap_tm);
129 if (snaptime_len == 0) {
130 DEBUG(10, ("strftime failed\n"));
131 return 0;
132 }
133 }
134
135 return snaptime_len;
136 }
137
138 /**
139 * Given a timstamp, build the string to insert into a path
140 * as a path component for creating the local path to the
141 * snapshot at the given timestamp of the input path.
142 *
143 * In the case of a parallel snapdir (specified with an
144 * absolute path), this is the inital portion of the
145 * local path of any snapshot file. The complete path is
146 * obtained by appending the portion of the file's path
147 * below the share root's mountpoint.
148 */
149 static char *shadow_copy2_insert_string(TALLOC_CTX *mem_ctx,
150 struct vfs_handle_struct *handle,
151 time_t snapshot)
152 {
153 fstring snaptime_string;
154 size_t snaptime_len = 0;
155 char *result = NULL;
156 struct shadow_copy2_config *config;
157
158 SMB_VFS_HANDLE_GET_DATA(handle, config, struct shadow_copy2_config,
159 return NULL);
160
161 snaptime_len = shadow_copy2_posix_gmt_string(handle,
162 snapshot,
163 snaptime_string,
164 sizeof(snaptime_string));
165 if (snaptime_len <= 0) {
166 return NULL;
167 }
168
169 if (config->snapdir_absolute) {
170 result = talloc_asprintf(mem_ctx, "%s/%s",
171 config->snapdir, snaptime_string);
172 } else {
173 result = talloc_asprintf(mem_ctx, "/%s/%s",
174 config->snapdir, snaptime_string);
175 }
176 if (result == NULL) {
177 DEBUG(1, (__location__ " talloc_asprintf failed\n"));
178 }
179
180 return result;
181 }
182
183 /**
184 * Build the posix snapshot path for the connection
185 * at the given timestamp, i.e. the absolute posix path
186 * that contains the snapshot for this file system.
187 *
188 * This only applies to classical case, i.e. not
189 * to the "snapdirseverywhere" mode.
190 */
191 static char *shadow_copy2_snapshot_path(TALLOC_CTX *mem_ctx,
192 struct vfs_handle_struct *handle,
193 time_t snapshot)
194 {
195 fstring snaptime_string;
196 size_t snaptime_len = 0;
197 char *result = NULL;
198 struct shadow_copy2_config *config;
199
200 SMB_VFS_HANDLE_GET_DATA(handle, config, struct shadow_copy2_config,
201 return NULL);
202
203 snaptime_len = shadow_copy2_posix_gmt_string(handle,
204 snapshot,
205 snaptime_string,
206 sizeof(snaptime_string));
207 if (snaptime_len <= 0) {
208 return NULL;
209 }
210
211 result = talloc_asprintf(mem_ctx, "%s/%s",
212 config->snapshot_basepath, snaptime_string);
213 if (result == NULL) {
214 DEBUG(1, (__location__ " talloc_asprintf failed\n"));
215 }
216
217 return result;
218 }
219
220 /**
221 * Strip a snapshot component from an filename as
222 * handed in via the smb layer.
223 * Returns the parsed timestamp and the stripped filename.
224 */
225 static bool shadow_copy2_strip_snapshot(TALLOC_CTX *mem_ctx,
226 struct vfs_handle_struct *handle,
227 const char *name,
228 time_t *ptimestamp,
229 char **pstripped)
230 {
231 struct tm tm;
232 time_t timestamp;
233 const char *p;
234 char *q;
235 char *stripped;
236 size_t rest_len, dst_len;
237 struct shadow_copy2_config *config;
238
239 SMB_VFS_HANDLE_GET_DATA(handle, config, struct shadow_copy2_config,
240 return false);
241
242 DEBUG(10, (__location__ ": enter path '%s'\n", name));
243
244 p = strstr_m(name, "@GMT-");
245 if (p == NULL) {
246 goto no_snapshot;
247 }
248 if ((p > name) && (p[-1] != '/')) {
249 /* the GMT-token does not start a path-component */
250 goto no_snapshot;
251 }
252 q = strptime(p, GMT_FORMAT, &tm);
253 if (q == NULL) {
254 goto no_snapshot;
255 }
256 tm.tm_isdst = -1;
257 timestamp = timegm(&tm);
258 if (timestamp == (time_t)-1) {
259 goto no_snapshot;
260 }
261 if ((p == name) && (q[0] == '\0')) {
262 /* the name consists of only the GMT token */
263 if (pstripped != NULL) {
264 stripped = talloc_strdup(mem_ctx, "");
265 if (stripped == NULL) {
266 return false;
267 }
268 *pstripped = stripped;
269 }
270 *ptimestamp = timestamp;
271 return true;
272 }
273 if (q[0] != '/') {
274 /*
275 * The GMT token is either at the end of the path
276 * or it is not a complete path component, i.e. the
277 * path component continues after the gmt-token.
278 *
279 * TODO: Is this correct? Or would the GMT tag as the
280 * last component be a valid input?
281 */
282 goto no_snapshot;
283 }
284 q += 1;
285
286 rest_len = strlen(q);
287 dst_len = (p-name) + rest_len;
288
289 if (config->snapdirseverywhere) {
290 char *insert;
291 bool have_insert;
292 insert = shadow_copy2_insert_string(talloc_tos(), handle,
293 timestamp);
294 if (insert == NULL) {
295 errno = ENOMEM;
296 return false;
297 }
298
299 DEBUG(10, (__location__ ": snapdirseverywhere mode.\n"
300 "path '%s'.\n"
301 "insert string '%s'\n", name, insert));
302
303 have_insert = (strstr(name, insert+1) != NULL);
304 if (have_insert) {
305 DEBUG(10, (__location__ ": insert string '%s' found in "
306 "path '%s' found in snapdirseverywhere mode "
307 "==> already converted\n", insert, name));
308 TALLOC_FREE(insert);
309 goto no_snapshot;
310 }
311 TALLOC_FREE(insert);
312 } else {
313 char *snapshot_path;
314 char *s;
315
316 snapshot_path = shadow_copy2_snapshot_path(talloc_tos(),
317 handle,
318 timestamp);
319 if (snapshot_path == NULL) {
320 errno = ENOMEM;
321 return false;
322 }
323
324 DEBUG(10, (__location__ " path: '%s'.\n"
325 "snapshot path: '%s'\n", name, snapshot_path));
326
327 s = strstr(name, snapshot_path);
328 if (s == name) {
329 /*
330 * this starts with "snapshot_basepath/GMT-Token"
331 * so it is already a converted absolute
332 * path. Don't process further.
333 */
334 DEBUG(10, (__location__ ": path '%s' starts with "
335 "snapshot path '%s' (not in "
336 "snapdirseverywhere mode) ==> "
337 "already converted\n", name, snapshot_path));
338 talloc_free(snapshot_path);
339 goto no_snapshot;
340 }
341 talloc_free(snapshot_path);
342 }
343
344 if (pstripped != NULL) {
345 stripped = talloc_array(mem_ctx, char, dst_len+1);
346 if (stripped == NULL) {
347 errno = ENOMEM;
348 return false;
349 }
350 if (p > name) {
351 memcpy(stripped, name, p-name);
352 }
353 if (rest_len > 0) {
354 memcpy(stripped + (p-name), q, rest_len);
355 }
356 stripped[dst_len] = '\0';
357 *pstripped = stripped;
358 }
359 *ptimestamp = timestamp;
360 return true;
361 no_snapshot:
362 *ptimestamp = 0;
363 return true;
364 }
365
366 static char *shadow_copy2_find_mount_point(TALLOC_CTX *mem_ctx,
367 vfs_handle_struct *handle)
368 {
369 char *path = talloc_strdup(mem_ctx, handle->conn->connectpath);
370 dev_t dev;
371 struct stat st;
372 char *p;
373
374 if (stat(path, &st) != 0) {
375 talloc_free(path);
376 return NULL;
377 }
378
379 dev = st.st_dev;
380
381 while ((p = strrchr(path, '/')) && p > path) {
382 *p = 0;
383 if (stat(path, &st) != 0) {
384 talloc_free(path);
385 return NULL;
386 }
387 if (st.st_dev != dev) {
388 *p = '/';
389 break;
390 }
391 }
392
393 return path;
394 }
395
396 /**
397 * Convert from a name as handed in via the SMB layer
398 * and a timestamp into the local path of the snapshot
399 * of the provided file at the provided time.
400 */
401 static char *shadow_copy2_convert(TALLOC_CTX *mem_ctx,
402 struct vfs_handle_struct *handle,
403 const char *name, time_t timestamp)
404 {
405 struct smb_filename converted_fname;
406 char *result = NULL;
407 size_t *slashes = NULL;
408 unsigned num_slashes;
409 char *path = NULL;
410 size_t pathlen;
411 char *insert = NULL;
412 char *converted = NULL;
413 size_t insertlen;
414 int i, saved_errno;
415 size_t min_offset;
416 struct shadow_copy2_config *config;
417
418 SMB_VFS_HANDLE_GET_DATA(handle, config, struct shadow_copy2_config,
419 return NULL);
420
421 DEBUG(10, ("converting '%s'\n", name));
422
423 if (!config->snapdirseverywhere) {
424 int ret;
425 char *snapshot_path;
426
427 snapshot_path = shadow_copy2_snapshot_path(talloc_tos(),
428 handle,
429 timestamp);
430 if (snapshot_path == NULL) {
431 goto fail;
432 }
433
434 if (config->rel_connectpath == NULL) {
435 converted = talloc_asprintf(mem_ctx, "%s/%s",
436 snapshot_path, name);
437 } else {
438 converted = talloc_asprintf(mem_ctx, "%s/%s/%s",
439 snapshot_path,
440 config->rel_connectpath,
441 name);
442 }
443 if (converted == NULL) {
444 goto fail;
445 }
446
447 ZERO_STRUCT(converted_fname);
448 converted_fname.base_name = converted;
449
450 ret = SMB_VFS_NEXT_LSTAT(handle, &converted_fname);
451 DEBUG(10, ("Trying[not snapdirseverywhere] %s: %d (%s)\n",
452 converted,
453 ret, ret == 0 ? "ok" : strerror(errno)));
454 if (ret == 0) {
455 DEBUG(10, ("Found %s\n", converted));
456 result = converted;
457 converted = NULL;
458 goto fail;
459 } else {
460 errno = ENOENT;
461 goto fail;
462 }
463 /* never reached ... */
464 }
465
466 path = talloc_asprintf(mem_ctx, "%s/%s", handle->conn->connectpath,
467 name);
468 if (path == NULL) {
469 errno = ENOMEM;
470 goto fail;
471 }
472 pathlen = talloc_get_size(path)-1;
473
474 if (!shadow_copy2_find_slashes(talloc_tos(), path,
475 &slashes, &num_slashes)) {
476 goto fail;
477 }
478
479 insert = shadow_copy2_insert_string(talloc_tos(), handle, timestamp);
480 if (insert == NULL) {
481 goto fail;
482 }
483 insertlen = talloc_get_size(insert)-1;
484
485 /*
486 * Note: We deliberatly don't expensively initialize the
487 * array with talloc_zero here: Putting zero into
488 * converted[pathlen+insertlen] below is sufficient, because
489 * in the following for loop, the insert string is inserted
490 * at various slash places. So the memory up to position
491 * pathlen+insertlen will always be initialized when the
492 * converted string is used.
493 */
494 converted = talloc_array(mem_ctx, char, pathlen + insertlen + 1);
495 if (converted == NULL) {
496 goto fail;
497 }
498
499 if (path[pathlen-1] != '/') {
500 /*
501 * Append a fake slash to find the snapshot root
502 */
503 size_t *tmp;
504 tmp = talloc_realloc(talloc_tos(), slashes,
505 size_t, num_slashes+1);
506 if (tmp == NULL) {
507 goto fail;
508 }
509 slashes = tmp;
510 slashes[num_slashes] = pathlen;
511 num_slashes += 1;
512 }
513
514 min_offset = 0;
515
516 if (!config->crossmountpoints) {
517 min_offset = strlen(config->mount_point);
518 }
519
520 memcpy(converted, path, pathlen+1);
521 converted[pathlen+insertlen] = '\0';
522
523 ZERO_STRUCT(converted_fname);
524 converted_fname.base_name = converted;
525
526 for (i = num_slashes-1; i>=0; i--) {
527 int ret;
528 size_t offset;
529
530 offset = slashes[i];
531
532 if (offset < min_offset) {
533 errno = ENOENT;
534 goto fail;
535 }
536
537 memcpy(converted+offset, insert, insertlen);
538
539 offset += insertlen;
540 memcpy(converted+offset, path + slashes[i],
541 pathlen - slashes[i]);
542
543 ret = SMB_VFS_NEXT_LSTAT(handle, &converted_fname);
544
545 DEBUG(10, ("Trying[snapdirseverywhere] %s: %d (%s)\n",
546 converted,
547 ret, ret == 0 ? "ok" : strerror(errno)));
548 if (ret == 0) {
549 /* success */
550 break;
551 }
552 if (errno == ENOTDIR) {
553 /*
554 * This is a valid condition: We appended the
555 * .snaphots/@GMT.. to a file name. Just try
556 * with the upper levels.
557 */
558 continue;
559 }
560 if (errno != ENOENT) {
561 /* Other problem than "not found" */
562 goto fail;
563 }
564 }
565
566 if (i >= 0) {
567 /*
568 * Found something
569 */
570 DEBUG(10, ("Found %s\n", converted));
571 result = converted;
572 converted = NULL;
573 } else {
574 errno = ENOENT;
575 }
576 fail:
577 saved_errno = errno;
578 TALLOC_FREE(converted);
579 TALLOC_FREE(insert);
580 TALLOC_FREE(slashes);
581 TALLOC_FREE(path);
582 errno = saved_errno;
583 return result;
584 }
585
586 /*
587 modify a sbuf return to ensure that inodes in the shadow directory
588 are different from those in the main directory
589 */
590 static void convert_sbuf(vfs_handle_struct *handle, const char *fname,
591 SMB_STRUCT_STAT *sbuf)
592 {
593 struct shadow_copy2_config *config;
594
595 SMB_VFS_HANDLE_GET_DATA(handle, config, struct shadow_copy2_config,
596 return);
597
598 if (config->fixinodes) {
599 /* some snapshot systems, like GPFS, return the name
600 device:inode for the snapshot files as the current
601 files. That breaks the 'restore' button in the shadow copy
602 GUI, as the client gets a sharing violation.
603
604 This is a crude way of allowing both files to be
605 open at once. It has a slight chance of inode
606 number collision, but I can't see a better approach
607 without significant VFS changes
608 */
609 uint32_t shash;
610
611 shash = hash(fname, strlen(fname), 0) & 0xFF000000;
612 if (shash == 0) {
613 shash = 1;
614 }
615 sbuf->st_ex_ino ^= shash;
616 }
617 }
618
619 static DIR *shadow_copy2_opendir(vfs_handle_struct *handle,
620 const char *fname,
621 const char *mask,
622 uint32 attr)
623 {
624 time_t timestamp;
625 char *stripped;
626 DIR *ret;
627 int saved_errno;
628 char *conv;
629
630 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
631 &timestamp, &stripped)) {
632 return NULL;
633 }
634 if (timestamp == 0) {
635 return SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
636 }
637 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
638 TALLOC_FREE(stripped);
639 if (conv == NULL) {
640 return NULL;
641 }
642 ret = SMB_VFS_NEXT_OPENDIR(handle, conv, mask, attr);
643 saved_errno = errno;
644 TALLOC_FREE(conv);
645 errno = saved_errno;
646 return ret;
647 }
648
649 static int shadow_copy2_rename(vfs_handle_struct *handle,
650 const struct smb_filename *smb_fname_src,
651 const struct smb_filename *smb_fname_dst)
652 {
653 time_t timestamp_src, timestamp_dst;
654
655 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
656 smb_fname_src->base_name,
657 &timestamp_src, NULL)) {
658 return -1;
659 }
660 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
661 smb_fname_dst->base_name,
662 &timestamp_dst, NULL)) {
663 return -1;
664 }
665 if (timestamp_src != 0) {
666 errno = EXDEV;
667 return -1;
668 }
669 if (timestamp_dst != 0) {
670 errno = EROFS;
671 return -1;
672 }
673 return SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
674 }
675
676 static int shadow_copy2_symlink(vfs_handle_struct *handle,
677 const char *oldname, const char *newname)
678 {
679 time_t timestamp_old, timestamp_new;
680
681 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, oldname,
682 &timestamp_old, NULL)) {
683 return -1;
684 }
685 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, newname,
686 &timestamp_new, NULL)) {
687 return -1;
688 }
689 if ((timestamp_old != 0) || (timestamp_new != 0)) {
690 errno = EROFS;
691 return -1;
692 }
693 return SMB_VFS_NEXT_SYMLINK(handle, oldname, newname);
694 }
695
696 static int shadow_copy2_link(vfs_handle_struct *handle,
697 const char *oldname, const char *newname)
698 {
699 time_t timestamp_old, timestamp_new;
700
701 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, oldname,
702 &timestamp_old, NULL)) {
703 return -1;
704 }
705 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, newname,
706 &timestamp_new, NULL)) {
707 return -1;
708 }
709 if ((timestamp_old != 0) || (timestamp_new != 0)) {
710 errno = EROFS;
711 return -1;
712 }
713 return SMB_VFS_NEXT_LINK(handle, oldname, newname);
714 }
715
716 static int shadow_copy2_stat(vfs_handle_struct *handle,
717 struct smb_filename *smb_fname)
718 {
719 time_t timestamp;
720 char *stripped, *tmp;
721 int ret, saved_errno;
722
723 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
724 smb_fname->base_name,
725 &timestamp, &stripped)) {
726 return -1;
727 }
728 if (timestamp == 0) {
729 return SMB_VFS_NEXT_STAT(handle, smb_fname);
730 }
731
732 tmp = smb_fname->base_name;
733 smb_fname->base_name = shadow_copy2_convert(
734 talloc_tos(), handle, stripped, timestamp);
735 TALLOC_FREE(stripped);
736
737 if (smb_fname->base_name == NULL) {
738 smb_fname->base_name = tmp;
739 return -1;
740 }
741
742 ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
743 saved_errno = errno;
744
745 TALLOC_FREE(smb_fname->base_name);
746 smb_fname->base_name = tmp;
747
748 if (ret == 0) {
749 convert_sbuf(handle, smb_fname->base_name, &smb_fname->st);
750 }
751 errno = saved_errno;
752 return ret;
753 }
754
755 static int shadow_copy2_lstat(vfs_handle_struct *handle,
756 struct smb_filename *smb_fname)
757 {
758 time_t timestamp;
759 char *stripped, *tmp;
760 int ret, saved_errno;
761
762 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
763 smb_fname->base_name,
764 &timestamp, &stripped)) {
765 return -1;
766 }
767 if (timestamp == 0) {
768 return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
769 }
770
771 tmp = smb_fname->base_name;
772 smb_fname->base_name = shadow_copy2_convert(
773 talloc_tos(), handle, stripped, timestamp);
774 TALLOC_FREE(stripped);
775
776 if (smb_fname->base_name == NULL) {
777 smb_fname->base_name = tmp;
778 return -1;
779 }
780
781 ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
782 saved_errno = errno;
783
784 TALLOC_FREE(smb_fname->base_name);
785 smb_fname->base_name = tmp;
786
787 if (ret == 0) {
788 convert_sbuf(handle, smb_fname->base_name, &smb_fname->st);
789 }
790 errno = saved_errno;
791 return ret;
792 }
793
794 static int shadow_copy2_fstat(vfs_handle_struct *handle, files_struct *fsp,
795 SMB_STRUCT_STAT *sbuf)
796 {
797 time_t timestamp;
798 int ret;
799
800 ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
801 if (ret == -1) {
802 return ret;
803 }
804 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
805 fsp->fsp_name->base_name,
806 &timestamp, NULL)) {
807 return 0;
808 }
809 if (timestamp != 0) {
810 convert_sbuf(handle, fsp->fsp_name->base_name, sbuf);
811 }
812 return 0;
813 }
814
815 static int shadow_copy2_open(vfs_handle_struct *handle,
816 struct smb_filename *smb_fname, files_struct *fsp,
817 int flags, mode_t mode)
818 {
819 time_t timestamp;
820 char *stripped, *tmp;
821 int ret, saved_errno;
822
823 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
824 smb_fname->base_name,
825 &timestamp, &stripped)) {
826 return -1;
827 }
828 if (timestamp == 0) {
829 return SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
830 }
831
832 tmp = smb_fname->base_name;
833 smb_fname->base_name = shadow_copy2_convert(
834 talloc_tos(), handle, stripped, timestamp);
835 TALLOC_FREE(stripped);
836
837 if (smb_fname->base_name == NULL) {
838 smb_fname->base_name = tmp;
839 return -1;
840 }
841
842 ret = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
843 saved_errno = errno;
844
845 TALLOC_FREE(smb_fname->base_name);
846 smb_fname->base_name = tmp;
847
848 errno = saved_errno;
849 return ret;
850 }
851
852 static int shadow_copy2_unlink(vfs_handle_struct *handle,
853 const struct smb_filename *smb_fname)
854 {
855 time_t timestamp;
856 char *stripped;
857 int ret, saved_errno;
858 struct smb_filename *conv;
859
860 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
861 smb_fname->base_name,
862 &timestamp, &stripped)) {
863 return -1;
864 }
865 if (timestamp == 0) {
866 return SMB_VFS_NEXT_UNLINK(handle, smb_fname);
867 }
868 conv = cp_smb_filename(talloc_tos(), smb_fname);
869 if (conv == NULL) {
870 errno = ENOMEM;
871 return -1;
872 }
873 conv->base_name = shadow_copy2_convert(
874 conv, handle, stripped, timestamp);
875 TALLOC_FREE(stripped);
876 if (conv->base_name == NULL) {
877 return -1;
878 }
879 ret = SMB_VFS_NEXT_UNLINK(handle, conv);
880 saved_errno = errno;
881 TALLOC_FREE(conv);
882 errno = saved_errno;
883 return ret;
884 }
885
886 static int shadow_copy2_chmod(vfs_handle_struct *handle, const char *fname,
887 mode_t mode)
888 {
889 time_t timestamp;
890 char *stripped;
891 int ret, saved_errno;
892 char *conv;
893
894 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
895 &timestamp, &stripped)) {
896 return -1;
897 }
898 if (timestamp == 0) {
899 return SMB_VFS_NEXT_CHMOD(handle, fname, mode);
900 }
901 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
902 TALLOC_FREE(stripped);
903 if (conv == NULL) {
904 return -1;
905 }
906 ret = SMB_VFS_NEXT_CHMOD(handle, conv, mode);
907 saved_errno = errno;
908 TALLOC_FREE(conv);
909 errno = saved_errno;
910 return ret;
911 }
912
913 static int shadow_copy2_chown(vfs_handle_struct *handle, const char *fname,
914 uid_t uid, gid_t gid)
915 {
916 time_t timestamp;
917 char *stripped;
918 int ret, saved_errno;
919 char *conv;
920
921 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
922 &timestamp, &stripped)) {
923 return -1;
924 }
925 if (timestamp == 0) {
926 return SMB_VFS_NEXT_CHOWN(handle, fname, uid, gid);
927 }
928 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
929 TALLOC_FREE(stripped);
930 if (conv == NULL) {
931 return -1;
932 }
933 ret = SMB_VFS_NEXT_CHOWN(handle, conv, uid, gid);
934 saved_errno = errno;
935 TALLOC_FREE(conv);
936 errno = saved_errno;
937 return ret;
938 }
939
940 static int shadow_copy2_chdir(vfs_handle_struct *handle,
941 const char *fname)
942 {
943 time_t timestamp;
944 char *stripped;
945 int ret, saved_errno;
946 char *conv;
947
948 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
949 &timestamp, &stripped)) {
950 return -1;
951 }
952 if (timestamp == 0) {
953 return SMB_VFS_NEXT_CHDIR(handle, fname);
954 }
955 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
956 TALLOC_FREE(stripped);
957 if (conv == NULL) {
958 return -1;
959 }
960 ret = SMB_VFS_NEXT_CHDIR(handle, conv);
961 saved_errno = errno;
962 TALLOC_FREE(conv);
963 errno = saved_errno;
964 return ret;
965 }
966
967 static int shadow_copy2_ntimes(vfs_handle_struct *handle,
968 const struct smb_filename *smb_fname,
969 struct smb_file_time *ft)
970 {
971 time_t timestamp;
972 char *stripped;
973 int ret, saved_errno;
974 struct smb_filename *conv;
975
976 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
977 smb_fname->base_name,
978 &timestamp, &stripped)) {
979 return -1;
980 }
981 if (timestamp == 0) {
982 return SMB_VFS_NEXT_NTIMES(handle, smb_fname, ft);
983 }
984 conv = cp_smb_filename(talloc_tos(), smb_fname);
985 if (conv == NULL) {
986 errno = ENOMEM;
987 return -1;
988 }
989 conv->base_name = shadow_copy2_convert(
990 conv, handle, stripped, timestamp);
991 TALLOC_FREE(stripped);
992 if (conv->base_name == NULL) {
993 return -1;
994 }
995 ret = SMB_VFS_NEXT_NTIMES(handle, conv, ft);
996 saved_errno = errno;
997 TALLOC_FREE(conv);
998 errno = saved_errno;
999 return ret;
1000 }
1001
1002 static int shadow_copy2_readlink(vfs_handle_struct *handle,
1003 const char *fname, char *buf, size_t bufsiz)
1004 {
1005 time_t timestamp;
1006 char *stripped;
1007 int ret, saved_errno;
1008 char *conv;
1009
1010 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1011 &timestamp, &stripped)) {
1012 return -1;
1013 }
1014 if (timestamp == 0) {
1015 return SMB_VFS_NEXT_READLINK(handle, fname, buf, bufsiz);
1016 }
1017 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1018 TALLOC_FREE(stripped);
1019 if (conv == NULL) {
1020 return -1;
1021 }
1022 ret = SMB_VFS_NEXT_READLINK(handle, conv, buf, bufsiz);
1023 saved_errno = errno;
1024 TALLOC_FREE(conv);
1025 errno = saved_errno;
1026 return ret;
1027 }
1028
1029 static int shadow_copy2_mknod(vfs_handle_struct *handle,
1030 const char *fname, mode_t mode, SMB_DEV_T dev)
1031 {
1032 time_t timestamp;
1033 char *stripped;
1034 int ret, saved_errno;
1035 char *conv;
1036
1037 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1038 &timestamp, &stripped)) {
1039 return -1;
1040 }
1041 if (timestamp == 0) {
1042 return SMB_VFS_NEXT_MKNOD(handle, fname, mode, dev);
1043 }
1044 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1045 TALLOC_FREE(stripped);
1046 if (conv == NULL) {
1047 return -1;
1048 }
1049 ret = SMB_VFS_NEXT_MKNOD(handle, conv, mode, dev);
1050 saved_errno = errno;
1051 TALLOC_FREE(conv);
1052 errno = saved_errno;
1053 return ret;
1054 }
1055
1056 static char *shadow_copy2_realpath(vfs_handle_struct *handle,
1057 const char *fname)
1058 {
1059 time_t timestamp;
1060 char *stripped = NULL;
1061 char *tmp = NULL;
1062 char *result = NULL;
1063 char *inserted = NULL;
1064 char *inserted_to, *inserted_end;
1065 int saved_errno;
1066
1067 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1068 &timestamp, &stripped)) {
1069 goto done;
1070 }
1071 if (timestamp == 0) {
1072 return SMB_VFS_NEXT_REALPATH(handle, fname);
1073 }
1074
1075 tmp = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1076 if (tmp == NULL) {
1077 goto done;
1078 }
1079
1080 result = SMB_VFS_NEXT_REALPATH(handle, tmp);
1081 if (result == NULL) {
1082 goto done;
1083 }
1084
1085 /*
1086 * Take away what we've inserted. This removes the @GMT-thingy
1087 * completely, but will give a path under the share root.
1088 */
1089 inserted = shadow_copy2_insert_string(talloc_tos(), handle, timestamp);
1090 if (inserted == NULL) {
1091 goto done;
1092 }
1093 inserted_to = strstr_m(result, inserted);
1094 if (inserted_to == NULL) {
1095 DEBUG(2, ("SMB_VFS_NEXT_REALPATH removed %s\n", inserted));
1096 goto done;
1097 }
1098 inserted_end = inserted_to + talloc_get_size(inserted) - 1;
1099 memmove(inserted_to, inserted_end, strlen(inserted_end)+1);
1100
1101 done:
1102 saved_errno = errno;
1103 TALLOC_FREE(inserted);
1104 TALLOC_FREE(tmp);
1105 TALLOC_FREE(stripped);
1106 errno = saved_errno;
1107 return result;
1108 }
1109
1110 /**
1111 * Check whether a given directory contains a
1112 * snapshot directory as direct subdirectory.
1113 * If yes, return the path of the snapshot-subdir,
1114 * otherwise return NULL.
1115 */
1116 static char *have_snapdir(struct vfs_handle_struct *handle,
1117 const char *path)
1118 {
1119 struct smb_filename smb_fname;
1120 int ret;
1121 struct shadow_copy2_config *config;
1122
1123 SMB_VFS_HANDLE_GET_DATA(handle, config, struct shadow_copy2_config,
1124 return NULL);
1125
1126 ZERO_STRUCT(smb_fname);
1127 smb_fname.base_name = talloc_asprintf(talloc_tos(), "%s/%s",
1128 path, config->snapdir);
1129 if (smb_fname.base_name == NULL) {
1130 return NULL;
1131 }
1132
1133 ret = SMB_VFS_NEXT_STAT(handle, &smb_fname);
1134 if ((ret == 0) && (S_ISDIR(smb_fname.st.st_ex_mode))) {
1135 return smb_fname.base_name;
1136 }
1137 TALLOC_FREE(smb_fname.base_name);
1138 return NULL;
1139 }
1140
1141 /**
1142 * Find the snapshot directory (if any) for the given
1143 * filename (which is relative to the share).
1144 */
1145 static const char *shadow_copy2_find_snapdir(TALLOC_CTX *mem_ctx,
1146 struct vfs_handle_struct *handle,
1147 struct smb_filename *smb_fname)
1148 {
1149 char *path, *p;
1150 const char *snapdir;
1151 struct shadow_copy2_config *config;
1152
1153 SMB_VFS_HANDLE_GET_DATA(handle, config, struct shadow_copy2_config,
1154 return NULL);
1155
1156 /*
1157 * If the non-snapdisrseverywhere mode, we should not search!
1158 */
1159 if (!config->snapdirseverywhere) {
1160 return config->snapshot_basepath;
1161 }
1162
1163 path = talloc_asprintf(mem_ctx, "%s/%s",
1164 handle->conn->connectpath,
1165 smb_fname->base_name);
1166 if (path == NULL) {
1167 return NULL;
1168 }
1169
1170 snapdir = have_snapdir(handle, path);
1171 if (snapdir != NULL) {
1172 TALLOC_FREE(path);
1173 return snapdir;
1174 }
1175
1176 while ((p = strrchr(path, '/')) && (p > path)) {
1177
1178 p[0] = '\0';
1179
1180 snapdir = have_snapdir(handle, path);
1181 if (snapdir != NULL) {
1182 TALLOC_FREE(path);
1183 return snapdir;
1184 }
1185 }
1186 TALLOC_FREE(path);
1187 return NULL;
1188 }
1189
1190 static bool shadow_copy2_snapshot_to_gmt(vfs_handle_struct *handle,
1191 const char *name,
1192 char *gmt, size_t gmt_len)
1193 {
1194 struct tm timestamp;
1195 time_t timestamp_t;
1196 unsigned long int timestamp_long;
1197 const char *fmt;
1198 struct shadow_copy2_config *config;
1199
1200 SMB_VFS_HANDLE_GET_DATA(handle, config, struct shadow_copy2_config,
1201 return NULL);
1202
1203 fmt = config->gmt_format;
1204
1205 ZERO_STRUCT(timestamp);
1206 if (config->use_sscanf) {
1207 if (sscanf(name, fmt, &timestamp_long) != 1) {
1208 DEBUG(10, ("shadow_copy2_snapshot_to_gmt: "
1209 "no sscanf match %s: %s\n",
1210 fmt, name));
1211 return false;
1212 }
1213 timestamp_t = timestamp_long;
1214 gmtime_r(&timestamp_t, &timestamp);
1215 } else {
1216 if (strptime(name, fmt, &timestamp) == NULL) {
1217 DEBUG(10, ("shadow_copy2_snapshot_to_gmt: "
1218 "no match %s: %s\n",
1219 fmt, name));
1220 return false;
1221 }
1222 DEBUG(10, ("shadow_copy2_snapshot_to_gmt: match %s: %s\n",
1223 fmt, name));
1224
1225 if (config->use_localtime) {
1226 timestamp.tm_isdst = -1;
1227 timestamp_t = mktime(&timestamp);
1228 gmtime_r(&timestamp_t, &timestamp);
1229 }
1230 }
1231
1232 strftime(gmt, gmt_len, GMT_FORMAT, &timestamp);
1233 return true;
1234 }
1235
1236 static int shadow_copy2_label_cmp_asc(const void *x, const void *y)
1237 {
1238 return strncmp((const char *)x, (const char *)y, sizeof(SHADOW_COPY_LABEL));
1239 }
1240
1241 static int shadow_copy2_label_cmp_desc(const void *x, const void *y)
1242 {
1243 return -strncmp((const char *)x, (const char *)y, sizeof(SHADOW_COPY_LABEL));
1244 }
1245
1246 /*
1247 sort the shadow copy data in ascending or descending order
1248 */
1249 static void shadow_copy2_sort_data(vfs_handle_struct *handle,
1250 struct shadow_copy_data *shadow_copy2_data)
1251 {
1252 int (*cmpfunc)(const void *, const void *);
1253 const char *sort;
1254 struct shadow_copy2_config *config;
1255
1256 SMB_VFS_HANDLE_GET_DATA(handle, config, struct shadow_copy2_config,
1257 return);
1258
1259 sort = config->sort_order;
1260 if (sort == NULL) {
1261 return;
1262 }
1263
1264 if (strcmp(sort, "asc") == 0) {
1265 cmpfunc = shadow_copy2_label_cmp_asc;
1266 } else if (strcmp(sort, "desc") == 0) {
1267 cmpfunc = shadow_copy2_label_cmp_desc;
1268 } else {
1269 return;
1270 }
1271
1272 if (shadow_copy2_data && shadow_copy2_data->num_volumes > 0 &&
1273 shadow_copy2_data->labels)
1274 {
1275 TYPESAFE_QSORT(shadow_copy2_data->labels,
1276 shadow_copy2_data->num_volumes,
1277 cmpfunc);
1278 }
1279 }
1280
1281 static int shadow_copy2_get_shadow_copy_data(
1282 vfs_handle_struct *handle, files_struct *fsp,
1283 struct shadow_copy_data *shadow_copy2_data,
1284 bool labels)
1285 {
1286 DIR *p;
1287 const char *snapdir;
1288 struct dirent *d;
1289 TALLOC_CTX *tmp_ctx = talloc_stackframe();
1290
1291 snapdir = shadow_copy2_find_snapdir(tmp_ctx, handle, fsp->fsp_name);
1292 if (snapdir == NULL) {
1293 DEBUG(0,("shadow:snapdir not found for %s in get_shadow_copy_data\n",
1294 handle->conn->connectpath));
1295 errno = EINVAL;
1296 talloc_free(tmp_ctx);
1297 return -1;
1298 }
1299
1300 p = SMB_VFS_NEXT_OPENDIR(handle, snapdir, NULL, 0);
1301
1302 if (!p) {
1303 DEBUG(2,("shadow_copy2: SMB_VFS_NEXT_OPENDIR() failed for '%s'"
1304 " - %s\n", snapdir, strerror(errno)));
1305 talloc_free(tmp_ctx);
1306 errno = ENOSYS;
1307 return -1;
1308 }
1309
1310 shadow_copy2_data->num_volumes = 0;
1311 shadow_copy2_data->labels = NULL;
1312
1313 while ((d = SMB_VFS_NEXT_READDIR(handle, p, NULL))) {
1314 char snapshot[GMT_NAME_LEN+1];
1315 SHADOW_COPY_LABEL *tlabels;
1316
1317 /*
1318 * ignore names not of the right form in the snapshot
1319 * directory
1320 */
1321 if (!shadow_copy2_snapshot_to_gmt(
1322 handle, d->d_name,
1323 snapshot, sizeof(snapshot))) {
1324
1325 DEBUG(6, ("shadow_copy2_get_shadow_copy_data: "
1326 "ignoring %s\n", d->d_name));
1327 continue;
1328 }
1329 DEBUG(6,("shadow_copy2_get_shadow_copy_data: %s -> %s\n",
1330 d->d_name, snapshot));
1331
1332 if (!labels) {
1333 /* the caller doesn't want the labels */
1334 shadow_copy2_data->num_volumes++;
1335 continue;
1336 }
1337
1338 tlabels = talloc_realloc(shadow_copy2_data,
1339 shadow_copy2_data->labels,
1340 SHADOW_COPY_LABEL,
1341 shadow_copy2_data->num_volumes+1);
1342 if (tlabels == NULL) {
1343 DEBUG(0,("shadow_copy2: out of memory\n"));
1344 SMB_VFS_NEXT_CLOSEDIR(handle, p);
1345 talloc_free(tmp_ctx);
1346 return -1;
1347 }
1348
1349 strlcpy(tlabels[shadow_copy2_data->num_volumes], snapshot,
1350 sizeof(*tlabels));
1351
1352 shadow_copy2_data->num_volumes++;
1353 shadow_copy2_data->labels = tlabels;
1354 }
1355
1356 SMB_VFS_NEXT_CLOSEDIR(handle,p);
1357
1358 shadow_copy2_sort_data(handle, shadow_copy2_data);
1359
1360 talloc_free(tmp_ctx);
1361 return 0;
1362 }
1363
1364 static NTSTATUS shadow_copy2_fget_nt_acl(vfs_handle_struct *handle,
1365 struct files_struct *fsp,
1366 uint32 security_info,
1367 TALLOC_CTX *mem_ctx,
1368 struct security_descriptor **ppdesc)
1369 {
1370 time_t timestamp;
1371 char *stripped;
1372 NTSTATUS status;
1373 char *conv;
1374
1375 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1376 fsp->fsp_name->base_name,
1377 &timestamp, &stripped)) {
1378 return map_nt_error_from_unix(errno);
1379 }
1380 if (timestamp == 0) {
1381 return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp, security_info,
1382 mem_ctx,
1383 ppdesc);
1384 }
1385 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1386 TALLOC_FREE(stripped);
1387 if (conv == NULL) {
1388 return map_nt_error_from_unix(errno);
1389 }
1390 status = SMB_VFS_NEXT_GET_NT_ACL(handle, conv, security_info,
1391 mem_ctx, ppdesc);
1392 TALLOC_FREE(conv);
1393 return status;
1394 }
1395
1396 static NTSTATUS shadow_copy2_get_nt_acl(vfs_handle_struct *handle,
1397 const char *fname,
1398 uint32 security_info,
1399 TALLOC_CTX *mem_ctx,
1400 struct security_descriptor **ppdesc)
1401 {
1402 time_t timestamp;
1403 char *stripped;
1404 NTSTATUS status;
1405 char *conv;
1406
1407 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1408 &timestamp, &stripped)) {
1409 return map_nt_error_from_unix(errno);
1410 }
1411 if (timestamp == 0) {
1412 return SMB_VFS_NEXT_GET_NT_ACL(handle, fname, security_info,
1413 mem_ctx, ppdesc);
1414 }
1415 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1416 TALLOC_FREE(stripped);
1417 if (conv == NULL) {
1418 return map_nt_error_from_unix(errno);
1419 }
1420 status = SMB_VFS_NEXT_GET_NT_ACL(handle, conv, security_info,
1421 mem_ctx, ppdesc);
1422 TALLOC_FREE(conv);
1423 return status;
1424 }
1425
1426 static int shadow_copy2_mkdir(vfs_handle_struct *handle,
1427 const char *fname, mode_t mode)
1428 {
1429 time_t timestamp;
1430 char *stripped;
1431 int ret, saved_errno;
1432 char *conv;
1433
1434 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1435 &timestamp, &stripped)) {
1436 return -1;
1437 }
1438 if (timestamp == 0) {
1439 return SMB_VFS_NEXT_MKDIR(handle, fname, mode);
1440 }
1441 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1442 TALLOC_FREE(stripped);
1443 if (conv == NULL) {
1444 return -1;
1445 }
1446 ret = SMB_VFS_NEXT_MKDIR(handle, conv, mode);
1447 saved_errno = errno;
1448 TALLOC_FREE(conv);
1449 errno = saved_errno;
1450 return ret;
1451 }
1452
1453 static int shadow_copy2_rmdir(vfs_handle_struct *handle, const char *fname)
1454 {
1455 time_t timestamp;
1456 char *stripped;
1457 int ret, saved_errno;
1458 char *conv;
1459
1460 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1461 &timestamp, &stripped)) {
1462 return -1;
1463 }
1464 if (timestamp == 0) {
1465 return SMB_VFS_NEXT_RMDIR(handle, fname);
1466 }
1467 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1468 TALLOC_FREE(stripped);
1469 if (conv == NULL) {
1470 return -1;
1471 }
1472 ret = SMB_VFS_NEXT_RMDIR(handle, conv);
1473 saved_errno = errno;
1474 TALLOC_FREE(conv);
1475 errno = saved_errno;
1476 return ret;
1477 }
1478
1479 static int shadow_copy2_chflags(vfs_handle_struct *handle, const char *fname,
1480 unsigned int flags)
1481 {
1482 time_t timestamp;
1483 char *stripped;
1484 int ret, saved_errno;
1485 char *conv;
1486
1487 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1488 &timestamp, &stripped)) {
1489 return -1;
1490 }
1491 if (timestamp == 0) {
1492 return SMB_VFS_NEXT_CHFLAGS(handle, fname, flags);
1493 }
1494 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1495 TALLOC_FREE(stripped);
1496 if (conv == NULL) {
1497 return -1;
1498 }
1499 ret = SMB_VFS_NEXT_CHFLAGS(handle, conv, flags);
1500 saved_errno = errno;
1501 TALLOC_FREE(conv);
1502 errno = saved_errno;
1503 return ret;
1504 }
1505
1506 static ssize_t shadow_copy2_getxattr(vfs_handle_struct *handle,
1507 const char *fname, const char *aname,
1508 void *value, size_t size)
1509 {
1510 time_t timestamp;
1511 char *stripped;
1512 ssize_t ret;
1513 int saved_errno;
1514 char *conv;
1515
1516 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1517 &timestamp, &stripped)) {
1518 return -1;
1519 }
1520 if (timestamp == 0) {
1521 return SMB_VFS_NEXT_GETXATTR(handle, fname, aname, value,
1522 size);
1523 }
1524 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1525 TALLOC_FREE(stripped);
1526 if (conv == NULL) {
1527 return -1;
1528 }
1529 ret = SMB_VFS_NEXT_GETXATTR(handle, conv, aname, value, size);
1530 saved_errno = errno;
1531 TALLOC_FREE(conv);
1532 errno = saved_errno;
1533 return ret;
1534 }
1535
1536 static ssize_t shadow_copy2_listxattr(struct vfs_handle_struct *handle,
1537 const char *fname,
1538 char *list, size_t size)
1539 {
1540 time_t timestamp;
1541 char *stripped;
1542 ssize_t ret;
1543 int saved_errno;
1544 char *conv;
1545
1546 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1547 &timestamp, &stripped)) {
1548 return -1;
1549 }
1550 if (timestamp == 0) {
1551 return SMB_VFS_NEXT_LISTXATTR(handle, fname, list, size);
1552 }
1553 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1554 TALLOC_FREE(stripped);
1555 if (conv == NULL) {
1556 return -1;
1557 }
1558 ret = SMB_VFS_NEXT_LISTXATTR(handle, conv, list, size);
1559 saved_errno = errno;
1560 TALLOC_FREE(conv);
1561 errno = saved_errno;
1562 return ret;
1563 }
1564
1565 static int shadow_copy2_removexattr(vfs_handle_struct *handle,
1566 const char *fname, const char *aname)
1567 {
1568 time_t timestamp;
1569 char *stripped;
1570 int ret, saved_errno;
1571 char *conv;
1572
1573 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1574 &timestamp, &stripped)) {
1575 return -1;
1576 }
1577 if (timestamp == 0) {
1578 return SMB_VFS_NEXT_REMOVEXATTR(handle, fname, aname);
1579 }
1580 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1581 TALLOC_FREE(stripped);
1582 if (conv == NULL) {
1583 return -1;
1584 }
1585 ret = SMB_VFS_NEXT_REMOVEXATTR(handle, conv, aname);
1586 saved_errno = errno;
1587 TALLOC_FREE(conv);
1588 errno = saved_errno;
1589 return ret;
1590 }
1591
1592 static int shadow_copy2_setxattr(struct vfs_handle_struct *handle,
1593 const char *fname,
1594 const char *aname, const void *value,
1595 size_t size, int flags)
1596 {
1597 time_t timestamp;
1598 char *stripped;
1599 ssize_t ret;
1600 int saved_errno;
1601 char *conv;
1602
1603 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1604 &timestamp, &stripped)) {
1605 return -1;
1606 }
1607 if (timestamp == 0) {
1608 return SMB_VFS_NEXT_SETXATTR(handle, fname, aname, value, size,
1609 flags);
1610 }
1611 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1612 TALLOC_FREE(stripped);
1613 if (conv == NULL) {
1614 return -1;
1615 }
1616 ret = SMB_VFS_NEXT_SETXATTR(handle, conv, aname, value, size, flags);
1617 saved_errno = errno;
1618 TALLOC_FREE(conv);
1619 errno = saved_errno;
1620 return ret;
1621 }
1622
1623 static int shadow_copy2_chmod_acl(vfs_handle_struct *handle,
1624 const char *fname, mode_t mode)
1625 {
1626 time_t timestamp;
1627 char *stripped;
1628 ssize_t ret;
1629 int saved_errno;
1630 char *conv;
1631
1632 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1633 &timestamp, &stripped)) {
1634 return -1;
1635 }
1636 if (timestamp == 0) {
1637 return SMB_VFS_NEXT_CHMOD_ACL(handle, fname, mode);
1638 }
1639 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1640 TALLOC_FREE(stripped);
1641 if (conv == NULL) {
1642 return -1;
1643 }
1644 ret = SMB_VFS_NEXT_CHMOD_ACL(handle, conv, mode);
1645 saved_errno = errno;
1646 TALLOC_FREE(conv);
1647 errno = saved_errno;
1648 return ret;
1649 }
1650
1651 static int shadow_copy2_get_real_filename(struct vfs_handle_struct *handle,
1652 const char *path,
1653 const char *name,
1654 TALLOC_CTX *mem_ctx,
1655 char **found_name)
1656 {
1657 time_t timestamp;
1658 char *stripped;
1659 ssize_t ret;
1660 int saved_errno;
1661 char *conv;
1662
1663 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, path,
1664 &timestamp, &stripped)) {
1665 return -1;
1666 }
1667 if (timestamp == 0) {
1668 return SMB_VFS_NEXT_GET_REAL_FILENAME(handle, path, name,
1669 mem_ctx, found_name);
1670 }
1671 if (stripped[0] == '\0') {
1672 *found_name = talloc_strdup(mem_ctx, name);
1673 if (*found_name == NULL) {
1674 errno = ENOMEM;
1675 return -1;
1676 }
1677 return 0;
1678 }
1679 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1680 TALLOC_FREE(stripped);
1681 if (conv == NULL) {
1682 return -1;
1683 }
1684 ret = SMB_VFS_NEXT_GET_REAL_FILENAME(handle, conv, name,
1685 mem_ctx, found_name);
1686 saved_errno = errno;
1687 TALLOC_FREE(conv);
1688 errno = saved_errno;
1689 return ret;
1690 }
1691
1692 static uint64_t shadow_copy2_disk_free(vfs_handle_struct *handle,
1693 const char *path, bool small_query,
1694 uint64_t *bsize, uint64_t *dfree,
1695 uint64_t *dsize)
1696 {
1697 time_t timestamp;
1698 char *stripped;
1699 ssize_t ret;
1700 int saved_errno;
1701 char *conv;
1702
1703 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, path,
1704 &timestamp, &stripped)) {
1705 return -1;
1706 }
1707 if (timestamp == 0) {
1708 return SMB_VFS_NEXT_DISK_FREE(handle, path, small_query,
1709 bsize, dfree, dsize);
1710 }
1711
1712 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1713 TALLOC_FREE(stripped);
1714 if (conv == NULL) {
1715 return -1;
1716 }
1717
1718 ret = SMB_VFS_NEXT_DISK_FREE(handle, conv, small_query, bsize, dfree,
1719 dsize);
1720
1721 saved_errno = errno;
1722 TALLOC_FREE(conv);
1723 errno = saved_errno;
1724
1725 return ret;
1726 }
1727
1728 static int shadow_copy2_connect(struct vfs_handle_struct *handle,
1729 const char *service, const char *user)
1730 {
1731 struct shadow_copy2_config *config;
1732 int ret;
1733 const char *snapdir;
1734 const char *gmt_format;
1735 const char *sort_order;
1736 const char *basedir;
1737 const char *mount_point;
1738
1739 DEBUG(10, (__location__ ": cnum[%u], connectpath[%s]\n",
1740 (unsigned)handle->conn->cnum,
1741 handle->conn->connectpath));
1742
1743 ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
1744 if (ret < 0) {
1745 return ret;
1746 }
1747
1748 config = talloc_zero(handle->conn, struct shadow_copy2_config);
1749 if (config == NULL) {
1750 DEBUG(0, ("talloc_zero() failed\n"));
1751 errno = ENOMEM;
1752 return -1;
1753 }
1754
1755 gmt_format = lp_parm_const_string(SNUM(handle->conn),
1756 "shadow", "format",
1757 GMT_FORMAT);
1758 config->gmt_format = talloc_strdup(config, gmt_format);
1759 if (config->gmt_format == NULL) {
1760 DEBUG(0, ("talloc_strdup() failed\n"));
1761 errno = ENOMEM;
1762 return -1;
1763 }
1764
1765 config->use_sscanf = lp_parm_bool(SNUM(handle->conn),
1766 "shadow", "sscanf", false);
1767
1768 config->use_localtime = lp_parm_bool(SNUM(handle->conn),
1769 "shadow", "localtime",
1770 false);
1771
1772 snapdir = lp_parm_const_string(SNUM(handle->conn),
1773 "shadow", "snapdir",
1774 ".snapshots");
1775 config->snapdir = talloc_strdup(config, snapdir);
1776 if (config->snapdir == NULL) {
1777 DEBUG(0, ("talloc_strdup() failed\n"));
1778 errno = ENOMEM;
1779 return -1;
1780 }
1781
1782 config->snapdirseverywhere = lp_parm_bool(SNUM(handle->conn),
1783 "shadow",
1784 "snapdirseverywhere",
1785 false);
1786
1787 config->crossmountpoints = lp_parm_bool(SNUM(handle->conn),
1788 "shadow", "crossmountpoints",
1789 false);
1790
1791 config->fixinodes = lp_parm_bool(SNUM(handle->conn),
1792 "shadow", "fixinodes",
1793 false);
1794
1795 sort_order = lp_parm_const_string(SNUM(handle->conn),
1796 "shadow", "sort", "desc");
1797 config->sort_order = talloc_strdup(config, sort_order);
1798 if (config->sort_order == NULL) {
1799 DEBUG(0, ("talloc_strdup() failed\n"));
1800 errno = ENOMEM;
1801 return -1;
1802 }
1803
1804 mount_point = lp_parm_const_string(SNUM(handle->conn),
1805 "shadow", "mountpoint", NULL);
1806 if (mount_point != NULL) {
1807 if (mount_point[0] != '/') {
1808 DEBUG(1, (__location__ " Warning: 'mountpoint' is "
1809 "relative ('%s'), but it has to be an "
1810 "absolute path. Ignoring provided value.\n",
1811 mount_point));
1812 mount_point = NULL;
1813 } else {
1814 char *p;
1815 p = strstr(handle->conn->connectpath, mount_point);
1816 if (p != handle->conn->connectpath) {
1817 DEBUG(1, ("Warning: mount_point (%s) is not a "
1818 "subdirectory of the share root "
1819 "(%s). Ignoring provided value.\n",
1820 mount_point,
1821 handle->conn->connectpath));
1822 mount_point = NULL;
1823 }
1824 }
1825 }
1826
1827 if (mount_point != NULL) {
1828 config->mount_point = talloc_strdup(config, mount_point);
1829 if (config->mount_point == NULL) {
1830 DEBUG(0, (__location__ " talloc_strdup() failed\n"));
1831 return -1;
1832 }
1833 } else {
1834 config->mount_point = shadow_copy2_find_mount_point(config,
1835 handle);
1836 if (config->mount_point == NULL) {
1837 DEBUG(0, (__location__ ": shadow_copy2_find_mount_point"
1838 " failed: %s\n", strerror(errno)));
1839 return -1;
1840 }
1841 }
1842
1843 basedir = lp_parm_const_string(SNUM(handle->conn),
1844 "shadow", "basedir", NULL);
1845
1846 if (basedir != NULL) {
1847 if (basedir[0] != '/') {
1848 DEBUG(1, (__location__ " Warning: 'basedir' is "
1849 "relative ('%s'), but it has to be an "
1850 "absolute path. Disabling basedir.\n",
1851 basedir));
1852 } else {
1853 char *p;
1854 p = strstr(basedir, config->mount_point);
1855 if (p != basedir) {
1856 DEBUG(1, ("Warning: basedir (%s) is not a "
1857 "subdirectory of the share root's "
1858 "mount point (%s). "
1859 "Disabling basedir\n",
1860 basedir, config->mount_point));
1861 } else {
1862 config->basedir = talloc_strdup(config,
1863 basedir);
1864 if (config->basedir == NULL) {
1865 DEBUG(0, ("talloc_strdup() failed\n"));
1866 errno = ENOMEM;
1867 return -1;
1868 }
1869 }
1870 }
1871 }
1872
1873 if (config->snapdirseverywhere && config->basedir != NULL) {
1874 DEBUG(1, (__location__ " Warning: 'basedir' is incompatible "
1875 "with 'snapdirseverywhere'. Disabling basedir.\n"));
1876 TALLOC_FREE(config->basedir);
1877 }
1878
1879 if (config->crossmountpoints && config->basedir != NULL) {
1880 DEBUG(1, (__location__ " Warning: 'basedir' is incompatible "
1881 "with 'crossmountpoints'. Disabling basedir.\n"));
1882 TALLOC_FREE(config->basedir);
1883 }
1884
1885 if (config->basedir == NULL) {
1886 config->basedir = config->mount_point;
1887 }
1888
1889 if (strlen(config->basedir) != strlen(handle->conn->connectpath)) {
1890 config->rel_connectpath = talloc_strdup(config,
1891 handle->conn->connectpath + strlen(config->basedir));
1892 if (config->rel_connectpath == NULL) {
1893 DEBUG(0, ("talloc_strdup() failed\n"));
1894 errno = ENOMEM;
1895 return -1;
1896 }
1897 }
1898
1899 if (config->snapdir[0] == '/') {
1900 config->snapdir_absolute = true;
1901
1902 if (config->snapdirseverywhere == true) {
1903 DEBUG(1, (__location__ " Warning: An absolute snapdir "
1904 "is incompatible with 'snapdirseverywhere', "
1905 "setting 'snapdirseverywhere' to false.\n"));
1906 config->snapdirseverywhere = false;
1907 }
1908
1909 if (config->crossmountpoints == true) {
1910 DEBUG(1, (__location__ " Warning: 'crossmountpoints' "
1911 "is not supported with an absolute snapdir. "
1912 "Disabling it.\n"));
1913 config->crossmountpoints = false;
1914 }
1915
1916 config->snapshot_basepath = config->snapdir;
1917 } else {
1918 config->snapshot_basepath = talloc_asprintf(config, "%s/%s",
1919 config->mount_point, config->snapdir);
1920 if (config->snapshot_basepath == NULL) {
1921 DEBUG(0, ("talloc_asprintf() failed\n"));
1922 errno = ENOMEM;
1923 return -1;
1924 }
1925 }
1926
1927 DEBUG(10, ("shadow_copy2_connect: configuration:\n"
1928 " share root: '%s'\n"
1929 " basedir: '%s'\n"
1930 " mountpoint: '%s'\n"
1931 " rel share root: '%s'\n"
1932 " snapdir: '%s'\n"
1933 " snapshot base path: '%s'\n"
1934 " format: '%s'\n"
1935 " use sscanf: %s\n"
1936 " snapdirs everywhere: %s\n"
1937 " cross mountpoints: %s\n"
1938 " fix inodes: %s\n"
1939 " sort order: %s\n"
1940 "",
1941 handle->conn->connectpath,
1942 config->basedir,
1943 config->mount_point,
1944 config->rel_connectpath,
1945 config->snapdir,
1946 config->snapshot_basepath,
1947 config->gmt_format,
1948 config->use_sscanf ? "yes" : "no",
1949 config->snapdirseverywhere ? "yes" : "no",
1950 config->crossmountpoints ? "yes" : "no",
1951 config->fixinodes ? "yes" : "no",
1952 config->sort_order
1953 ));
1954
1955
1956 SMB_VFS_HANDLE_SET_DATA(handle, config,
1957 NULL, struct shadow_copy2_config,
1958 return -1);
1959
1960 return 0;
1961 }
1962
1963 static struct vfs_fn_pointers vfs_shadow_copy2_fns = {
1964 .connect_fn = shadow_copy2_connect,
1965 .opendir_fn = shadow_copy2_opendir,
1966 .disk_free_fn = shadow_copy2_disk_free,
1967 .rename_fn = shadow_copy2_rename,
1968 .link_fn = shadow_copy2_link,
1969 .symlink_fn = shadow_copy2_symlink,
1970 .stat_fn = shadow_copy2_stat,
1971 .lstat_fn = shadow_copy2_lstat,
1972 .fstat_fn = shadow_copy2_fstat,
1973 .open_fn = shadow_copy2_open,
1974 .unlink_fn = shadow_copy2_unlink,
1975 .chmod_fn = shadow_copy2_chmod,
1976 .chown_fn = shadow_copy2_chown,
1977 .chdir_fn = shadow_copy2_chdir,
1978 .ntimes_fn = shadow_copy2_ntimes,
1979 .readlink_fn = shadow_copy2_readlink,
1980 .mknod_fn = shadow_copy2_mknod,
1981 .realpath_fn = shadow_copy2_realpath,
1982 .get_nt_acl_fn = shadow_copy2_get_nt_acl,
1983 .fget_nt_acl_fn = shadow_copy2_fget_nt_acl,
1984 .get_shadow_copy_data_fn = shadow_copy2_get_shadow_copy_data,
1985 .mkdir_fn = shadow_copy2_mkdir,
1986 .rmdir_fn = shadow_copy2_rmdir,
1987 .getxattr_fn = shadow_copy2_getxattr,
1988 .listxattr_fn = shadow_copy2_listxattr,
1989 .removexattr_fn = shadow_copy2_removexattr,
1990 .setxattr_fn = shadow_copy2_setxattr,
1991 .chmod_acl_fn = shadow_copy2_chmod_acl,
1992 .chflags_fn = shadow_copy2_chflags,
1993 .get_real_filename_fn = shadow_copy2_get_real_filename,
1994 };
1995
1996 NTSTATUS vfs_shadow_copy2_init(void);
1997 NTSTATUS vfs_shadow_copy2_init(void)
1998 {
1999 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
2000 "shadow_copy2", &vfs_shadow_copy2_fns);
2001 }
Samba GIT mirror