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libsmb: Fix an error path memleak
[Samba.git] / source3 / modules / vfs_shadow_copy2.c
blobb6745cf169b317f93caabf53c04e27ca164bdf37
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 * Copyright (C) Rajesh Joseph 2016
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 */
25
26 /*
27 * This is a second implemetation of a shadow copy module for exposing
28 * file system snapshots to windows clients as shadow copies.
29 *
30 * See the manual page for documentation.
31 */
32
33 #include "includes.h"
34 #include "smbd/smbd.h"
35 #include "system/filesys.h"
36 #include "include/ntioctl.h"
37 #include "util_tdb.h"
38 #include "lib/util_path.h"
39
40 struct shadow_copy2_config {
41 char *gmt_format;
42 bool use_sscanf;
43 bool use_localtime;
44 char *snapdir;
45 char *delimiter;
46 bool snapdirseverywhere;
47 bool crossmountpoints;
48 bool fixinodes;
49 char *sort_order;
50 bool snapdir_absolute;
51 char *mount_point;
52 char *rel_connectpath; /* share root, relative to a snapshot root */
53 char *snapshot_basepath; /* the absolute version of snapdir */
54 };
55
56 /* Data-structure to hold the list of snap entries */
57 struct shadow_copy2_snapentry {
58 char *snapname;
59 char *time_fmt;
60 struct shadow_copy2_snapentry *next;
61 struct shadow_copy2_snapentry *prev;
62 };
63
64 struct shadow_copy2_snaplist_info {
65 struct shadow_copy2_snapentry *snaplist; /* snapshot list */
66 regex_t *regex; /* Regex to filter snaps */
67 time_t fetch_time; /* snaplist update time */
68 };
69
70
71 /*
72 * shadow_copy2 private structure. This structure will be
73 * used to keep module specific information
74 */
75 struct shadow_copy2_private {
76 struct shadow_copy2_config *config;
77 struct shadow_copy2_snaplist_info *snaps;
78 char *shadow_cwd; /* Absolute $cwd path. */
79 /* Absolute connectpath - can vary depending on $cwd. */
80 char *shadow_connectpath;
81 /* talloc'ed realpath return. */
82 struct smb_filename *shadow_realpath;
83 };
84
85 static int shadow_copy2_get_shadow_copy_data(
86 vfs_handle_struct *handle, files_struct *fsp,
87 struct shadow_copy_data *shadow_copy2_data,
88 bool labels);
89
90 /**
91 *This function will create a new snapshot list entry and
92 * return to the caller. This entry will also be added to
93 * the global snapshot list.
94 *
95 * @param[in] priv shadow_copy2 specific data structure
96 * @return Newly created snapshot entry or NULL on failure
97 */
98 static struct shadow_copy2_snapentry *shadow_copy2_create_snapentry(
99 struct shadow_copy2_private *priv)
100 {
101 struct shadow_copy2_snapentry *tmpentry = NULL;
102
103 tmpentry = talloc_zero(priv->snaps, struct shadow_copy2_snapentry);
104 if (tmpentry == NULL) {
105 DBG_ERR("talloc_zero() failed\n");
106 errno = ENOMEM;
107 return NULL;
108 }
109
110 DLIST_ADD(priv->snaps->snaplist, tmpentry);
111
112 return tmpentry;
113 }
114
115 /**
116 *This function will delete the entire snaplist and reset
117 * priv->snaps->snaplist to NULL.
118 *
119 * @param[in] priv shadow_copye specific data structure
120 */
121 static void shadow_copy2_delete_snaplist(struct shadow_copy2_private *priv)
122 {
123 struct shadow_copy2_snapentry *tmp = NULL;
124
125 while ((tmp = priv->snaps->snaplist) != NULL) {
126 DLIST_REMOVE(priv->snaps->snaplist, tmp);
127 talloc_free(tmp);
128 }
129 }
130
131 /**
132 * Given a timestamp this function searches the global snapshot list
133 * and returns the complete snapshot directory name saved in the entry.
134 *
135 * @param[in] priv shadow_copy2 specific structure
136 * @param[in] timestamp timestamp corresponding to one of the snapshot
137 * @param[out] snap_str buffer to copy the actual snapshot name
138 * @param[in] len length of snap_str buffer
139 *
140 * @return Length of actual snapshot name, and -1 on failure
141 */
142 static ssize_t shadow_copy2_saved_snapname(struct shadow_copy2_private *priv,
143 struct tm *timestamp,
144 char *snap_str, size_t len)
145 {
146 ssize_t snaptime_len = -1;
147 struct shadow_copy2_snapentry *entry = NULL;
148
149 snaptime_len = strftime(snap_str, len, GMT_FORMAT, timestamp);
150 if (snaptime_len == 0) {
151 DBG_ERR("strftime failed\n");
152 return -1;
153 }
154
155 snaptime_len = -1;
156
157 for (entry = priv->snaps->snaplist; entry; entry = entry->next) {
158 if (strcmp(entry->time_fmt, snap_str) == 0) {
159 snaptime_len = snprintf(snap_str, len, "%s",
160 entry->snapname);
161 return snaptime_len;
162 }
163 }
164
165 snap_str[0] = 0;
166 return snaptime_len;
167 }
168
169
170 /**
171 * This function will check if snaplist is updated or not. If snaplist
172 * is empty then it will create a new list. Each time snaplist is updated
173 * the time is recorded. If the snapshot time is greater than the snaplist
174 * update time then chances are we are working on an older list. Then discard
175 * the old list and fetch a new snaplist.
176 *
177 * @param[in] handle VFS handle struct
178 * @param[in] snap_time time of snapshot
179 *
180 * @return true if the list is updated else false
181 */
182 static bool shadow_copy2_update_snaplist(struct vfs_handle_struct *handle,
183 time_t snap_time)
184 {
185 int ret = -1;
186 bool snaplist_updated = false;
187 struct files_struct fsp = {0};
188 struct smb_filename smb_fname = {0};
189 double seconds = 0.0;
190 struct shadow_copy2_private *priv = NULL;
191
192 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
193 return false);
194
195 seconds = difftime(snap_time, priv->snaps->fetch_time);
196
197 /*
198 * Fetch the snapshot list if either the snaplist is empty or the
199 * required snapshot time is greater than the last fetched snaplist
200 * time.
201 */
202 if (seconds > 0 || (priv->snaps->snaplist == NULL)) {
203 smb_fname.base_name = discard_const_p(char, ".");
204 fsp.fsp_name = &smb_fname;
205
206 ret = shadow_copy2_get_shadow_copy_data(handle, &fsp,
207 NULL, false);
208 if (ret == 0) {
209 snaplist_updated = true;
210 } else {
211 DBG_ERR("Failed to get shadow copy data\n");
212 }
213
214 }
215
216 return snaplist_updated;
217 }
218
219 static bool shadow_copy2_find_slashes(TALLOC_CTX *mem_ctx, const char *str,
220 size_t **poffsets,
221 unsigned *pnum_offsets)
222 {
223 unsigned num_offsets;
224 size_t *offsets;
225 const char *p;
226
227 num_offsets = 0;
228
229 p = str;
230 while ((p = strchr(p, '/')) != NULL) {
231 num_offsets += 1;
232 p += 1;
233 }
234
235 offsets = talloc_array(mem_ctx, size_t, num_offsets);
236 if (offsets == NULL) {
237 return false;
238 }
239
240 p = str;
241 num_offsets = 0;
242 while ((p = strchr(p, '/')) != NULL) {
243 offsets[num_offsets] = p-str;
244 num_offsets += 1;
245 p += 1;
246 }
247
248 *poffsets = offsets;
249 *pnum_offsets = num_offsets;
250 return true;
251 }
252
253 /**
254 * Given a timestamp, build the posix level GMT-tag string
255 * based on the configurable format.
256 */
257 static ssize_t shadow_copy2_posix_gmt_string(struct vfs_handle_struct *handle,
258 time_t snapshot,
259 char *snaptime_string,
260 size_t len)
261 {
262 struct tm snap_tm;
263 ssize_t snaptime_len;
264 struct shadow_copy2_config *config;
265 struct shadow_copy2_private *priv;
266
267 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
268 return 0);
269
270 config = priv->config;
271
272 if (config->use_sscanf) {
273 snaptime_len = snprintf(snaptime_string,
274 len,
275 config->gmt_format,
276 (unsigned long)snapshot);
277 if (snaptime_len <= 0) {
278 DEBUG(10, ("snprintf failed\n"));
279 return -1;
280 }
281 } else {
282 if (config->use_localtime) {
283 if (localtime_r(&snapshot, &snap_tm) == 0) {
284 DEBUG(10, ("gmtime_r failed\n"));
285 return -1;
286 }
287 } else {
288 if (gmtime_r(&snapshot, &snap_tm) == 0) {
289 DEBUG(10, ("gmtime_r failed\n"));
290 return -1;
291 }
292 }
293
294 if (priv->snaps->regex != NULL) {
295 snaptime_len = shadow_copy2_saved_snapname(priv,
296 &snap_tm, snaptime_string, len);
297 if (snaptime_len >= 0)
298 return snaptime_len;
299
300 /*
301 * If we fail to find the snapshot name, chances are
302 * that we have not updated our snaplist. Make sure the
303 * snaplist is updated.
304 */
305 if (!shadow_copy2_update_snaplist(handle, snapshot)) {
306 DBG_DEBUG("shadow_copy2_update_snaplist "
307 "failed\n");
308 return -1;
309 }
310
311 return shadow_copy2_saved_snapname(priv,
312 &snap_tm, snaptime_string, len);
313 }
314
315 snaptime_len = strftime(snaptime_string,
316 len,
317 config->gmt_format,
318 &snap_tm);
319 if (snaptime_len == 0) {
320 DEBUG(10, ("strftime failed\n"));
321 return -1;
322 }
323 }
324
325 return snaptime_len;
326 }
327
328 /**
329 * Given a timestamp, build the string to insert into a path
330 * as a path component for creating the local path to the
331 * snapshot at the given timestamp of the input path.
332 *
333 * In the case of a parallel snapdir (specified with an
334 * absolute path), this is the inital portion of the
335 * local path of any snapshot file. The complete path is
336 * obtained by appending the portion of the file's path
337 * below the share root's mountpoint.
338 */
339 static char *shadow_copy2_insert_string(TALLOC_CTX *mem_ctx,
340 struct vfs_handle_struct *handle,
341 time_t snapshot)
342 {
343 fstring snaptime_string;
344 ssize_t snaptime_len = 0;
345 char *result = NULL;
346 struct shadow_copy2_config *config;
347 struct shadow_copy2_private *priv;
348
349 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
350 return NULL);
351
352 config = priv->config;
353
354 snaptime_len = shadow_copy2_posix_gmt_string(handle,
355 snapshot,
356 snaptime_string,
357 sizeof(snaptime_string));
358 if (snaptime_len <= 0) {
359 return NULL;
360 }
361
362 if (config->snapdir_absolute) {
363 result = talloc_asprintf(mem_ctx, "%s/%s",
364 config->snapdir, snaptime_string);
365 } else {
366 result = talloc_asprintf(mem_ctx, "/%s/%s",
367 config->snapdir, snaptime_string);
368 }
369 if (result == NULL) {
370 DEBUG(1, (__location__ " talloc_asprintf failed\n"));
371 }
372
373 return result;
374 }
375
376 /**
377 * Build the posix snapshot path for the connection
378 * at the given timestamp, i.e. the absolute posix path
379 * that contains the snapshot for this file system.
380 *
381 * This only applies to classical case, i.e. not
382 * to the "snapdirseverywhere" mode.
383 */
384 static char *shadow_copy2_snapshot_path(TALLOC_CTX *mem_ctx,
385 struct vfs_handle_struct *handle,
386 time_t snapshot)
387 {
388 fstring snaptime_string;
389 ssize_t snaptime_len = 0;
390 char *result = NULL;
391 struct shadow_copy2_private *priv;
392
393 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
394 return NULL);
395
396 snaptime_len = shadow_copy2_posix_gmt_string(handle,
397 snapshot,
398 snaptime_string,
399 sizeof(snaptime_string));
400 if (snaptime_len <= 0) {
401 return NULL;
402 }
403
404 result = talloc_asprintf(mem_ctx, "%s/%s",
405 priv->config->snapshot_basepath, snaptime_string);
406 if (result == NULL) {
407 DEBUG(1, (__location__ " talloc_asprintf failed\n"));
408 }
409
410 return result;
411 }
412
413 static char *make_path_absolute(TALLOC_CTX *mem_ctx,
414 struct shadow_copy2_private *priv,
415 const char *name)
416 {
417 char *newpath = NULL;
418 char *abs_path = NULL;
419
420 if (name[0] != '/') {
421 newpath = talloc_asprintf(mem_ctx,
422 "%s/%s",
423 priv->shadow_cwd,
424 name);
425 if (newpath == NULL) {
426 return NULL;
427 }
428 name = newpath;
429 }
430 abs_path = canonicalize_absolute_path(mem_ctx, name);
431 TALLOC_FREE(newpath);
432 return abs_path;
433 }
434
435 /* Return a $cwd-relative path. */
436 static bool make_relative_path(const char *cwd, char *abs_path)
437 {
438 size_t cwd_len = strlen(cwd);
439 size_t abs_len = strlen(abs_path);
440
441 if (abs_len < cwd_len) {
442 return false;
443 }
444 if (memcmp(abs_path, cwd, cwd_len) != 0) {
445 return false;
446 }
447 /* The cwd_len != 1 case is for $cwd == '/' */
448 if (cwd_len != 1 &&
449 abs_path[cwd_len] != '/' &&
450 abs_path[cwd_len] != '\0')
451 {
452 return false;
453 }
454 if (abs_path[cwd_len] == '/') {
455 cwd_len++;
456 }
457 memmove(abs_path, &abs_path[cwd_len], abs_len + 1 - cwd_len);
458 return true;
459 }
460
461 static bool shadow_copy2_snapshot_to_gmt(vfs_handle_struct *handle,
462 const char *name,
463 char *gmt, size_t gmt_len);
464
465 /*
466 * Check if an incoming filename is already a snapshot converted pathname.
467 *
468 * If so, it returns the pathname truncated at the snapshot point which
469 * will be used as the connectpath.
470 */
471
472 static int check_for_converted_path(TALLOC_CTX *mem_ctx,
473 struct vfs_handle_struct *handle,
474 struct shadow_copy2_private *priv,
475 char *abs_path,
476 bool *ppath_already_converted,
477 char **pconnectpath)
478 {
479 size_t snapdirlen = 0;
480 char *p = strstr_m(abs_path, priv->config->snapdir);
481 char *q = NULL;
482 char *connect_path = NULL;
483 char snapshot[GMT_NAME_LEN+1];
484
485 *ppath_already_converted = false;
486
487 if (p == NULL) {
488 /* Must at least contain shadow:snapdir. */
489 return 0;
490 }
491
492 if (priv->config->snapdir[0] == '/' &&
493 p != abs_path) {
494 /* Absolute shadow:snapdir must be at the start. */
495 return 0;
496 }
497
498 snapdirlen = strlen(priv->config->snapdir);
499 if (p[snapdirlen] != '/') {
500 /* shadow:snapdir must end as a separate component. */
501 return 0;
502 }
503
504 if (p > abs_path && p[-1] != '/') {
505 /* shadow:snapdir must start as a separate component. */
506 return 0;
507 }
508
509 p += snapdirlen;
510 p++; /* Move past the / */
511
512 /*
513 * Need to return up to the next path
514 * component after the time.
515 * This will be used as the connectpath.
516 */
517 q = strchr(p, '/');
518 if (q == NULL) {
519 /*
520 * No next path component.
521 * Use entire string.
522 */
523 connect_path = talloc_strdup(mem_ctx,
524 abs_path);
525 } else {
526 connect_path = talloc_strndup(mem_ctx,
527 abs_path,
528 q - abs_path);
529 }
530 if (connect_path == NULL) {
531 return ENOMEM;
532 }
533
534 /*
535 * Point p at the same offset in connect_path as
536 * it is in abs_path.
537 */
538
539 p = &connect_path[p - abs_path];
540
541 /*
542 * Now ensure there is a time string at p.
543 * The SMB-format @GMT-token string is returned
544 * in snapshot.
545 */
546
547 if (!shadow_copy2_snapshot_to_gmt(handle,
548 p,
549 snapshot,
550 sizeof(snapshot))) {
551 TALLOC_FREE(connect_path);
552 return 0;
553 }
554
555 if (pconnectpath != NULL) {
556 *pconnectpath = connect_path;
557 }
558
559 *ppath_already_converted = true;
560
561 DBG_DEBUG("path |%s| is already converted. "
562 "connect path = |%s|\n",
563 abs_path,
564 connect_path);
565
566 return 0;
567 }
568
569 /**
570 * This function does two things.
571 *
572 * 1). Checks if an incoming filename is already a
573 * snapshot converted pathname.
574 * If so, it returns the pathname truncated
575 * at the snapshot point which will be used
576 * as the connectpath, and then does an early return.
577 *
578 * 2). Checks if an incoming filename contains an
579 * SMB-layer @GMT- style timestamp.
580 * If so, it strips the timestamp, and returns
581 * both the timestamp and the stripped path
582 * (making it cwd-relative).
583 */
584
585 static bool shadow_copy2_strip_snapshot_internal(TALLOC_CTX *mem_ctx,
586 struct vfs_handle_struct *handle,
587 const char *orig_name,
588 time_t *ptimestamp,
589 char **pstripped,
590 char **psnappath)
591 {
592 struct tm tm;
593 time_t timestamp = 0;
594 const char *p;
595 char *q;
596 char *stripped = NULL;
597 size_t rest_len, dst_len;
598 struct shadow_copy2_private *priv;
599 ptrdiff_t len_before_gmt;
600 const char *name = orig_name;
601 char *abs_path = NULL;
602 bool ret = true;
603 bool already_converted = false;
604 int err = 0;
605
606 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
607 return false);
608
609 DEBUG(10, (__location__ ": enter path '%s'\n", name));
610
611 abs_path = make_path_absolute(mem_ctx, priv, name);
612 if (abs_path == NULL) {
613 ret = false;
614 goto out;
615 }
616 name = abs_path;
617
618 DEBUG(10, (__location__ ": abs path '%s'\n", name));
619
620 err = check_for_converted_path(mem_ctx,
621 handle,
622 priv,
623 abs_path,
624 &already_converted,
625 psnappath);
626 if (err != 0) {
627 /* error in conversion. */
628 ret = false;
629 goto out;
630 }
631
632 if (already_converted) {
633 goto out;
634 }
635
636 /*
637 * From here we're only looking to strip an
638 * SMB-layer @GMT- token.
639 */
640
641 p = strstr_m(name, "@GMT-");
642 if (p == NULL) {
643 DEBUG(11, ("@GMT not found\n"));
644 goto out;
645 }
646 if ((p > name) && (p[-1] != '/')) {
647 /* the GMT-token does not start a path-component */
648 DEBUG(10, ("not at start, p=%p, name=%p, p[-1]=%d\n",
649 p, name, (int)p[-1]));
650 goto out;
651 }
652
653 len_before_gmt = p - name;
654
655 q = strptime(p, GMT_FORMAT, &tm);
656 if (q == NULL) {
657 DEBUG(10, ("strptime failed\n"));
658 goto out;
659 }
660 tm.tm_isdst = -1;
661 timestamp = timegm(&tm);
662 if (timestamp == (time_t)-1) {
663 DEBUG(10, ("timestamp==-1\n"));
664 goto out;
665 }
666 if (q[0] == '\0') {
667 /*
668 * The name consists of only the GMT token or the GMT
669 * token is at the end of the path. XP seems to send
670 * @GMT- at the end under certain circumstances even
671 * with a path prefix.
672 */
673 if (pstripped != NULL) {
674 if (len_before_gmt > 1) {
675 /*
676 * There is a path (and not only a slash)
677 * before the @GMT-. Remove the trailing
678 * slash character.
679 */
680 len_before_gmt -= 1;
681 }
682 stripped = talloc_strndup(mem_ctx, name,
683 len_before_gmt);
684 if (stripped == NULL) {
685 ret = false;
686 goto out;
687 }
688 if (orig_name[0] != '/') {
689 if (make_relative_path(priv->shadow_cwd,
690 stripped) == false) {
691 DEBUG(10, (__location__ ": path '%s' "
692 "doesn't start with cwd '%s'\n",
693 stripped, priv->shadow_cwd));
694 ret = false;
695 errno = ENOENT;
696 goto out;
697 }
698 }
699 *pstripped = stripped;
700 }
701 *ptimestamp = timestamp;
702 goto out;
703 }
704 if (q[0] != '/') {
705 /*
706 * It is not a complete path component, i.e. the path
707 * component continues after the gmt-token.
708 */
709 DEBUG(10, ("q[0] = %d\n", (int)q[0]));
710 goto out;
711 }
712 q += 1;
713
714 rest_len = strlen(q);
715 dst_len = len_before_gmt + rest_len;
716
717 if (pstripped != NULL) {
718 stripped = talloc_array(mem_ctx, char, dst_len+1);
719 if (stripped == NULL) {
720 ret = false;
721 goto out;
722 }
723 if (p > name) {
724 memcpy(stripped, name, len_before_gmt);
725 }
726 if (rest_len > 0) {
727 memcpy(stripped + len_before_gmt, q, rest_len);
728 }
729 stripped[dst_len] = '\0';
730 if (orig_name[0] != '/') {
731 if (make_relative_path(priv->shadow_cwd,
732 stripped) == false) {
733 DEBUG(10, (__location__ ": path '%s' "
734 "doesn't start with cwd '%s'\n",
735 stripped, priv->shadow_cwd));
736 ret = false;
737 errno = ENOENT;
738 goto out;
739 }
740 }
741 *pstripped = stripped;
742 }
743 *ptimestamp = timestamp;
744 ret = true;
745
746 out:
747 TALLOC_FREE(abs_path);
748 return ret;
749 }
750
751 static bool shadow_copy2_strip_snapshot(TALLOC_CTX *mem_ctx,
752 struct vfs_handle_struct *handle,
753 const char *orig_name,
754 time_t *ptimestamp,
755 char **pstripped)
756 {
757 return shadow_copy2_strip_snapshot_internal(mem_ctx,
758 handle,
759 orig_name,
760 ptimestamp,
761 pstripped,
762 NULL);
763 }
764
765 static char *shadow_copy2_find_mount_point(TALLOC_CTX *mem_ctx,
766 vfs_handle_struct *handle)
767 {
768 char *path = talloc_strdup(mem_ctx, handle->conn->connectpath);
769 dev_t dev;
770 struct stat st;
771 char *p;
772
773 if (stat(path, &st) != 0) {
774 talloc_free(path);
775 return NULL;
776 }
777
778 dev = st.st_dev;
779
780 while ((p = strrchr(path, '/')) && p > path) {
781 *p = 0;
782 if (stat(path, &st) != 0) {
783 talloc_free(path);
784 return NULL;
785 }
786 if (st.st_dev != dev) {
787 *p = '/';
788 break;
789 }
790 }
791
792 return path;
793 }
794
795 /**
796 * Convert from a name as handed in via the SMB layer
797 * and a timestamp into the local path of the snapshot
798 * of the provided file at the provided time.
799 * Also return the path in the snapshot corresponding
800 * to the file's share root.
801 */
802 static char *shadow_copy2_do_convert(TALLOC_CTX *mem_ctx,
803 struct vfs_handle_struct *handle,
804 const char *name, time_t timestamp,
805 size_t *snaproot_len)
806 {
807 struct smb_filename converted_fname;
808 char *result = NULL;
809 size_t *slashes = NULL;
810 unsigned num_slashes;
811 char *path = NULL;
812 size_t pathlen;
813 char *insert = NULL;
814 char *converted = NULL;
815 size_t insertlen, connectlen = 0;
816 int saved_errno = 0;
817 int i;
818 size_t min_offset;
819 struct shadow_copy2_config *config;
820 struct shadow_copy2_private *priv;
821 size_t in_share_offset = 0;
822
823 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
824 return NULL);
825
826 config = priv->config;
827
828 DEBUG(10, ("converting '%s'\n", name));
829
830 if (!config->snapdirseverywhere) {
831 int ret;
832 char *snapshot_path;
833
834 snapshot_path = shadow_copy2_snapshot_path(talloc_tos(),
835 handle,
836 timestamp);
837 if (snapshot_path == NULL) {
838 goto fail;
839 }
840
841 if (config->rel_connectpath == NULL) {
842 converted = talloc_asprintf(mem_ctx, "%s/%s",
843 snapshot_path, name);
844 } else {
845 converted = talloc_asprintf(mem_ctx, "%s/%s/%s",
846 snapshot_path,
847 config->rel_connectpath,
848 name);
849 }
850 if (converted == NULL) {
851 goto fail;
852 }
853
854 ZERO_STRUCT(converted_fname);
855 converted_fname.base_name = converted;
856
857 ret = SMB_VFS_NEXT_LSTAT(handle, &converted_fname);
858 DEBUG(10, ("Trying[not snapdirseverywhere] %s: %d (%s)\n",
859 converted,
860 ret, ret == 0 ? "ok" : strerror(errno)));
861 if (ret == 0) {
862 DEBUG(10, ("Found %s\n", converted));
863 result = converted;
864 converted = NULL;
865 if (snaproot_len != NULL) {
866 *snaproot_len = strlen(snapshot_path);
867 if (config->rel_connectpath != NULL) {
868 *snaproot_len +=
869 strlen(config->rel_connectpath) + 1;
870 }
871 }
872 goto fail;
873 } else {
874 errno = ENOENT;
875 goto fail;
876 }
877 /* never reached ... */
878 }
879
880 connectlen = strlen(handle->conn->connectpath);
881 if (name[0] == 0) {
882 path = talloc_strdup(mem_ctx, handle->conn->connectpath);
883 } else {
884 path = talloc_asprintf(
885 mem_ctx, "%s/%s", handle->conn->connectpath, name);
886 }
887 if (path == NULL) {
888 errno = ENOMEM;
889 goto fail;
890 }
891 pathlen = talloc_get_size(path)-1;
892
893 if (!shadow_copy2_find_slashes(talloc_tos(), path,
894 &slashes, &num_slashes)) {
895 goto fail;
896 }
897
898 insert = shadow_copy2_insert_string(talloc_tos(), handle, timestamp);
899 if (insert == NULL) {
900 goto fail;
901 }
902 insertlen = talloc_get_size(insert)-1;
903
904 /*
905 * Note: We deliberatly don't expensively initialize the
906 * array with talloc_zero here: Putting zero into
907 * converted[pathlen+insertlen] below is sufficient, because
908 * in the following for loop, the insert string is inserted
909 * at various slash places. So the memory up to position
910 * pathlen+insertlen will always be initialized when the
911 * converted string is used.
912 */
913 converted = talloc_array(mem_ctx, char, pathlen + insertlen + 1);
914 if (converted == NULL) {
915 goto fail;
916 }
917
918 if (path[pathlen-1] != '/') {
919 /*
920 * Append a fake slash to find the snapshot root
921 */
922 size_t *tmp;
923 tmp = talloc_realloc(talloc_tos(), slashes,
924 size_t, num_slashes+1);
925 if (tmp == NULL) {
926 goto fail;
927 }
928 slashes = tmp;
929 slashes[num_slashes] = pathlen;
930 num_slashes += 1;
931 }
932
933 min_offset = 0;
934
935 if (!config->crossmountpoints) {
936 min_offset = strlen(config->mount_point);
937 }
938
939 memcpy(converted, path, pathlen+1);
940 converted[pathlen+insertlen] = '\0';
941
942 ZERO_STRUCT(converted_fname);
943 converted_fname.base_name = converted;
944
945 for (i = num_slashes-1; i>=0; i--) {
946 int ret;
947 size_t offset;
948
949 offset = slashes[i];
950
951 if (offset < min_offset) {
952 errno = ENOENT;
953 goto fail;
954 }
955
956 if (offset >= connectlen) {
957 in_share_offset = offset;
958 }
959
960 memcpy(converted+offset, insert, insertlen);
961
962 offset += insertlen;
963 memcpy(converted+offset, path + slashes[i],
964 pathlen - slashes[i]);
965
966 ret = SMB_VFS_NEXT_LSTAT(handle, &converted_fname);
967
968 DEBUG(10, ("Trying[snapdirseverywhere] %s: %d (%s)\n",
969 converted,
970 ret, ret == 0 ? "ok" : strerror(errno)));
971 if (ret == 0) {
972 /* success */
973 if (snaproot_len != NULL) {
974 *snaproot_len = in_share_offset + insertlen;
975 }
976 break;
977 }
978 if (errno == ENOTDIR) {
979 /*
980 * This is a valid condition: We appended the
981 * .snaphots/@GMT.. to a file name. Just try
982 * with the upper levels.
983 */
984 continue;
985 }
986 if (errno != ENOENT) {
987 /* Other problem than "not found" */
988 goto fail;
989 }
990 }
991
992 if (i >= 0) {
993 /*
994 * Found something
995 */
996 DEBUG(10, ("Found %s\n", converted));
997 result = converted;
998 converted = NULL;
999 } else {
1000 errno = ENOENT;
1001 }
1002 fail:
1003 if (result == NULL) {
1004 saved_errno = errno;
1005 }
1006 TALLOC_FREE(converted);
1007 TALLOC_FREE(insert);
1008 TALLOC_FREE(slashes);
1009 TALLOC_FREE(path);
1010 if (saved_errno != 0) {
1011 errno = saved_errno;
1012 }
1013 return result;
1014 }
1015
1016 /**
1017 * Convert from a name as handed in via the SMB layer
1018 * and a timestamp into the local path of the snapshot
1019 * of the provided file at the provided time.
1020 */
1021 static char *shadow_copy2_convert(TALLOC_CTX *mem_ctx,
1022 struct vfs_handle_struct *handle,
1023 const char *name, time_t timestamp)
1024 {
1025 return shadow_copy2_do_convert(mem_ctx, handle, name, timestamp, NULL);
1026 }
1027
1028 /*
1029 modify a sbuf return to ensure that inodes in the shadow directory
1030 are different from those in the main directory
1031 */
1032 static void convert_sbuf(vfs_handle_struct *handle, const char *fname,
1033 SMB_STRUCT_STAT *sbuf)
1034 {
1035 struct shadow_copy2_private *priv;
1036
1037 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1038 return);
1039
1040 if (priv->config->fixinodes) {
1041 /* some snapshot systems, like GPFS, return the name
1042 device:inode for the snapshot files as the current
1043 files. That breaks the 'restore' button in the shadow copy
1044 GUI, as the client gets a sharing violation.
1045
1046 This is a crude way of allowing both files to be
1047 open at once. It has a slight chance of inode
1048 number collision, but I can't see a better approach
1049 without significant VFS changes
1050 */
1051 TDB_DATA key = { .dptr = discard_const_p(uint8_t, fname),
1052 .dsize = strlen(fname) };
1053 uint32_t shash;
1054
1055 shash = tdb_jenkins_hash(&key) & 0xFF000000;
1056 if (shash == 0) {
1057 shash = 1;
1058 }
1059 sbuf->st_ex_ino ^= shash;
1060 }
1061 }
1062
1063 static DIR *shadow_copy2_opendir(vfs_handle_struct *handle,
1064 const struct smb_filename *smb_fname,
1065 const char *mask,
1066 uint32_t attr)
1067 {
1068 time_t timestamp = 0;
1069 char *stripped = NULL;
1070 DIR *ret;
1071 int saved_errno = 0;
1072 char *conv;
1073 struct smb_filename *conv_smb_fname = NULL;
1074
1075 if (!shadow_copy2_strip_snapshot(talloc_tos(),
1076 handle,
1077 smb_fname->base_name,
1078 &timestamp,
1079 &stripped)) {
1080 return NULL;
1081 }
1082 if (timestamp == 0) {
1083 return SMB_VFS_NEXT_OPENDIR(handle, smb_fname, mask, attr);
1084 }
1085 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1086 TALLOC_FREE(stripped);
1087 if (conv == NULL) {
1088 return NULL;
1089 }
1090 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
1091 conv,
1092 NULL,
1093 NULL,
1094 smb_fname->flags);
1095 if (conv_smb_fname == NULL) {
1096 TALLOC_FREE(conv);
1097 return NULL;
1098 }
1099 ret = SMB_VFS_NEXT_OPENDIR(handle, conv_smb_fname, mask, attr);
1100 if (ret == NULL) {
1101 saved_errno = errno;
1102 }
1103 TALLOC_FREE(conv);
1104 TALLOC_FREE(conv_smb_fname);
1105 if (saved_errno != 0) {
1106 errno = saved_errno;
1107 }
1108 return ret;
1109 }
1110
1111 static int shadow_copy2_rename(vfs_handle_struct *handle,
1112 const struct smb_filename *smb_fname_src,
1113 const struct smb_filename *smb_fname_dst)
1114 {
1115 time_t timestamp_src = 0;
1116 time_t timestamp_dst = 0;
1117 char *snappath_src = NULL;
1118 char *snappath_dst = NULL;
1119
1120 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(), handle,
1121 smb_fname_src->base_name,
1122 &timestamp_src, NULL, &snappath_src)) {
1123 return -1;
1124 }
1125 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(), handle,
1126 smb_fname_dst->base_name,
1127 &timestamp_dst, NULL, &snappath_dst)) {
1128 return -1;
1129 }
1130 if (timestamp_src != 0) {
1131 errno = EXDEV;
1132 return -1;
1133 }
1134 if (timestamp_dst != 0) {
1135 errno = EROFS;
1136 return -1;
1137 }
1138 /*
1139 * Don't allow rename on already converted paths.
1140 */
1141 if (snappath_src != NULL) {
1142 errno = EXDEV;
1143 return -1;
1144 }
1145 if (snappath_dst != NULL) {
1146 errno = EROFS;
1147 return -1;
1148 }
1149 return SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
1150 }
1151
1152 static int shadow_copy2_symlink(vfs_handle_struct *handle,
1153 const char *link_contents,
1154 const struct smb_filename *new_smb_fname)
1155 {
1156 time_t timestamp_old = 0;
1157 time_t timestamp_new = 0;
1158 char *snappath_old = NULL;
1159 char *snappath_new = NULL;
1160
1161 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1162 handle,
1163 link_contents,
1164 &timestamp_old,
1165 NULL,
1166 &snappath_old)) {
1167 return -1;
1168 }
1169 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1170 handle,
1171 new_smb_fname->base_name,
1172 &timestamp_new,
1173 NULL,
1174 &snappath_new)) {
1175 return -1;
1176 }
1177 if ((timestamp_old != 0) || (timestamp_new != 0)) {
1178 errno = EROFS;
1179 return -1;
1180 }
1181 /*
1182 * Don't allow symlinks on already converted paths.
1183 */
1184 if ((snappath_old != NULL) || (snappath_new != NULL)) {
1185 errno = EROFS;
1186 return -1;
1187 }
1188 return SMB_VFS_NEXT_SYMLINK(handle, link_contents, new_smb_fname);
1189 }
1190
1191 static int shadow_copy2_link(vfs_handle_struct *handle,
1192 const struct smb_filename *old_smb_fname,
1193 const struct smb_filename *new_smb_fname)
1194 {
1195 time_t timestamp_old = 0;
1196 time_t timestamp_new = 0;
1197 char *snappath_old = NULL;
1198 char *snappath_new = NULL;
1199
1200 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1201 handle,
1202 old_smb_fname->base_name,
1203 &timestamp_old,
1204 NULL,
1205 &snappath_old)) {
1206 return -1;
1207 }
1208 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1209 handle,
1210 new_smb_fname->base_name,
1211 &timestamp_new,
1212 NULL,
1213 &snappath_new)) {
1214 return -1;
1215 }
1216 if ((timestamp_old != 0) || (timestamp_new != 0)) {
1217 errno = EROFS;
1218 return -1;
1219 }
1220 /*
1221 * Don't allow links on already converted paths.
1222 */
1223 if ((snappath_old != NULL) || (snappath_new != NULL)) {
1224 errno = EROFS;
1225 return -1;
1226 }
1227 return SMB_VFS_NEXT_LINK(handle, old_smb_fname, new_smb_fname);
1228 }
1229
1230 static int shadow_copy2_stat(vfs_handle_struct *handle,
1231 struct smb_filename *smb_fname)
1232 {
1233 time_t timestamp = 0;
1234 char *stripped = NULL;
1235 char *tmp;
1236 int saved_errno = 0;
1237 int ret;
1238
1239 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1240 smb_fname->base_name,
1241 &timestamp, &stripped)) {
1242 return -1;
1243 }
1244 if (timestamp == 0) {
1245 return SMB_VFS_NEXT_STAT(handle, smb_fname);
1246 }
1247
1248 tmp = smb_fname->base_name;
1249 smb_fname->base_name = shadow_copy2_convert(
1250 talloc_tos(), handle, stripped, timestamp);
1251 TALLOC_FREE(stripped);
1252
1253 if (smb_fname->base_name == NULL) {
1254 smb_fname->base_name = tmp;
1255 return -1;
1256 }
1257
1258 ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
1259 if (ret == -1) {
1260 saved_errno = errno;
1261 }
1262
1263 TALLOC_FREE(smb_fname->base_name);
1264 smb_fname->base_name = tmp;
1265
1266 if (ret == 0) {
1267 convert_sbuf(handle, smb_fname->base_name, &smb_fname->st);
1268 }
1269 if (saved_errno != 0) {
1270 errno = saved_errno;
1271 }
1272 return ret;
1273 }
1274
1275 static int shadow_copy2_lstat(vfs_handle_struct *handle,
1276 struct smb_filename *smb_fname)
1277 {
1278 time_t timestamp = 0;
1279 char *stripped = NULL;
1280 char *tmp;
1281 int saved_errno = 0;
1282 int ret;
1283
1284 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1285 smb_fname->base_name,
1286 &timestamp, &stripped)) {
1287 return -1;
1288 }
1289 if (timestamp == 0) {
1290 return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
1291 }
1292
1293 tmp = smb_fname->base_name;
1294 smb_fname->base_name = shadow_copy2_convert(
1295 talloc_tos(), handle, stripped, timestamp);
1296 TALLOC_FREE(stripped);
1297
1298 if (smb_fname->base_name == NULL) {
1299 smb_fname->base_name = tmp;
1300 return -1;
1301 }
1302
1303 ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
1304 if (ret == -1) {
1305 saved_errno = errno;
1306 }
1307
1308 TALLOC_FREE(smb_fname->base_name);
1309 smb_fname->base_name = tmp;
1310
1311 if (ret == 0) {
1312 convert_sbuf(handle, smb_fname->base_name, &smb_fname->st);
1313 }
1314 if (saved_errno != 0) {
1315 errno = saved_errno;
1316 }
1317 return ret;
1318 }
1319
1320 static int shadow_copy2_fstat(vfs_handle_struct *handle, files_struct *fsp,
1321 SMB_STRUCT_STAT *sbuf)
1322 {
1323 time_t timestamp = 0;
1324 int ret;
1325
1326 ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
1327 if (ret == -1) {
1328 return ret;
1329 }
1330 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1331 fsp->fsp_name->base_name,
1332 &timestamp, NULL)) {
1333 return 0;
1334 }
1335 if (timestamp != 0) {
1336 convert_sbuf(handle, fsp->fsp_name->base_name, sbuf);
1337 }
1338 return 0;
1339 }
1340
1341 static int shadow_copy2_open(vfs_handle_struct *handle,
1342 struct smb_filename *smb_fname, files_struct *fsp,
1343 int flags, mode_t mode)
1344 {
1345 time_t timestamp = 0;
1346 char *stripped = NULL;
1347 char *tmp;
1348 int saved_errno = 0;
1349 int ret;
1350
1351 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1352 smb_fname->base_name,
1353 &timestamp, &stripped)) {
1354 return -1;
1355 }
1356 if (timestamp == 0) {
1357 return SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
1358 }
1359
1360 tmp = smb_fname->base_name;
1361 smb_fname->base_name = shadow_copy2_convert(
1362 talloc_tos(), handle, stripped, timestamp);
1363 TALLOC_FREE(stripped);
1364
1365 if (smb_fname->base_name == NULL) {
1366 smb_fname->base_name = tmp;
1367 return -1;
1368 }
1369
1370 ret = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
1371 if (ret == -1) {
1372 saved_errno = errno;
1373 }
1374
1375 TALLOC_FREE(smb_fname->base_name);
1376 smb_fname->base_name = tmp;
1377
1378 if (saved_errno != 0) {
1379 errno = saved_errno;
1380 }
1381 return ret;
1382 }
1383
1384 static int shadow_copy2_unlink(vfs_handle_struct *handle,
1385 const struct smb_filename *smb_fname)
1386 {
1387 time_t timestamp = 0;
1388 char *stripped = NULL;
1389 int saved_errno = 0;
1390 int ret;
1391 struct smb_filename *conv;
1392
1393 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1394 smb_fname->base_name,
1395 &timestamp, &stripped)) {
1396 return -1;
1397 }
1398 if (timestamp == 0) {
1399 return SMB_VFS_NEXT_UNLINK(handle, smb_fname);
1400 }
1401 conv = cp_smb_filename(talloc_tos(), smb_fname);
1402 if (conv == NULL) {
1403 errno = ENOMEM;
1404 return -1;
1405 }
1406 conv->base_name = shadow_copy2_convert(
1407 conv, handle, stripped, timestamp);
1408 TALLOC_FREE(stripped);
1409 if (conv->base_name == NULL) {
1410 return -1;
1411 }
1412 ret = SMB_VFS_NEXT_UNLINK(handle, conv);
1413 if (ret == -1) {
1414 saved_errno = errno;
1415 }
1416 TALLOC_FREE(conv);
1417 if (saved_errno != 0) {
1418 errno = saved_errno;
1419 }
1420 return ret;
1421 }
1422
1423 static int shadow_copy2_chmod(vfs_handle_struct *handle,
1424 const struct smb_filename *smb_fname,
1425 mode_t mode)
1426 {
1427 time_t timestamp = 0;
1428 char *stripped = NULL;
1429 int saved_errno = 0;
1430 int ret;
1431 char *conv = NULL;
1432 struct smb_filename *conv_smb_fname;
1433
1434 if (!shadow_copy2_strip_snapshot(talloc_tos(),
1435 handle,
1436 smb_fname->base_name,
1437 &timestamp,
1438 &stripped)) {
1439 return -1;
1440 }
1441 if (timestamp == 0) {
1442 TALLOC_FREE(stripped);
1443 return SMB_VFS_NEXT_CHMOD(handle, smb_fname, mode);
1444 }
1445 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1446 TALLOC_FREE(stripped);
1447 if (conv == NULL) {
1448 return -1;
1449 }
1450 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
1451 conv,
1452 NULL,
1453 NULL,
1454 smb_fname->flags);
1455 if (conv_smb_fname == NULL) {
1456 TALLOC_FREE(conv);
1457 errno = ENOMEM;
1458 return -1;
1459 }
1460
1461 ret = SMB_VFS_NEXT_CHMOD(handle, conv_smb_fname, mode);
1462 if (ret == -1) {
1463 saved_errno = errno;
1464 }
1465 TALLOC_FREE(conv);
1466 TALLOC_FREE(conv_smb_fname);
1467 if (saved_errno != 0) {
1468 errno = saved_errno;
1469 }
1470 return ret;
1471 }
1472
1473 static int shadow_copy2_chown(vfs_handle_struct *handle,
1474 const struct smb_filename *smb_fname,
1475 uid_t uid,
1476 gid_t gid)
1477 {
1478 time_t timestamp = 0;
1479 char *stripped = NULL;
1480 int saved_errno = 0;
1481 int ret;
1482 char *conv = NULL;
1483 struct smb_filename *conv_smb_fname = NULL;
1484
1485 if (!shadow_copy2_strip_snapshot(talloc_tos(),
1486 handle,
1487 smb_fname->base_name,
1488 &timestamp,
1489 &stripped)) {
1490 return -1;
1491 }
1492 if (timestamp == 0) {
1493 return SMB_VFS_NEXT_CHOWN(handle, smb_fname, uid, gid);
1494 }
1495 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1496 TALLOC_FREE(stripped);
1497 if (conv == NULL) {
1498 return -1;
1499 }
1500 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
1501 conv,
1502 NULL,
1503 NULL,
1504 smb_fname->flags);
1505 if (conv_smb_fname == NULL) {
1506 TALLOC_FREE(conv);
1507 errno = ENOMEM;
1508 return -1;
1509 }
1510 ret = SMB_VFS_NEXT_CHOWN(handle, conv_smb_fname, uid, gid);
1511 if (ret == -1) {
1512 saved_errno = errno;
1513 }
1514 TALLOC_FREE(conv);
1515 TALLOC_FREE(conv_smb_fname);
1516 if (saved_errno != 0) {
1517 errno = saved_errno;
1518 }
1519 return ret;
1520 }
1521
1522 static void store_cwd_data(vfs_handle_struct *handle,
1523 const char *connectpath)
1524 {
1525 struct shadow_copy2_private *priv = NULL;
1526 struct smb_filename *cwd_fname = NULL;
1527
1528 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1529 return);
1530
1531 TALLOC_FREE(priv->shadow_cwd);
1532 cwd_fname = SMB_VFS_NEXT_GETWD(handle, talloc_tos());
1533 if (cwd_fname == NULL) {
1534 smb_panic("getwd failed\n");
1535 }
1536 DBG_DEBUG("shadow cwd = %s\n", cwd_fname->base_name);
1537 priv->shadow_cwd = talloc_strdup(priv, cwd_fname->base_name);
1538 TALLOC_FREE(cwd_fname);
1539 if (priv->shadow_cwd == NULL) {
1540 smb_panic("talloc failed\n");
1541 }
1542 TALLOC_FREE(priv->shadow_connectpath);
1543 if (connectpath) {
1544 DBG_DEBUG("shadow conectpath = %s\n", connectpath);
1545 priv->shadow_connectpath = talloc_strdup(priv, connectpath);
1546 if (priv->shadow_connectpath == NULL) {
1547 smb_panic("talloc failed\n");
1548 }
1549 }
1550 }
1551
1552 static int shadow_copy2_chdir(vfs_handle_struct *handle,
1553 const struct smb_filename *smb_fname)
1554 {
1555 time_t timestamp = 0;
1556 char *stripped = NULL;
1557 char *snappath = NULL;
1558 int ret = -1;
1559 int saved_errno = 0;
1560 char *conv = NULL;
1561 size_t rootpath_len = 0;
1562 struct smb_filename *conv_smb_fname = NULL;
1563
1564 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1565 handle,
1566 smb_fname->base_name,
1567 &timestamp,
1568 &stripped,
1569 &snappath)) {
1570 return -1;
1571 }
1572 if (stripped != NULL) {
1573 conv = shadow_copy2_do_convert(talloc_tos(),
1574 handle,
1575 stripped,
1576 timestamp,
1577 &rootpath_len);
1578 TALLOC_FREE(stripped);
1579 if (conv == NULL) {
1580 return -1;
1581 }
1582 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
1583 conv,
1584 NULL,
1585 NULL,
1586 smb_fname->flags);
1587 } else {
1588 conv_smb_fname = cp_smb_filename(talloc_tos(), smb_fname);
1589 }
1590
1591 if (conv_smb_fname == NULL) {
1592 TALLOC_FREE(conv);
1593 errno = ENOMEM;
1594 return -1;
1595 }
1596
1597 ret = SMB_VFS_NEXT_CHDIR(handle, conv_smb_fname);
1598 if (ret == -1) {
1599 saved_errno = errno;
1600 }
1601
1602 if (ret == 0) {
1603 if (conv != NULL && rootpath_len != 0) {
1604 conv[rootpath_len] = '\0';
1605 } else if (snappath != 0) {
1606 TALLOC_FREE(conv);
1607 conv = snappath;
1608 }
1609 store_cwd_data(handle, conv);
1610 }
1611
1612 TALLOC_FREE(stripped);
1613 TALLOC_FREE(conv);
1614 TALLOC_FREE(conv_smb_fname);
1615
1616 if (saved_errno != 0) {
1617 errno = saved_errno;
1618 }
1619 return ret;
1620 }
1621
1622 static int shadow_copy2_ntimes(vfs_handle_struct *handle,
1623 const struct smb_filename *smb_fname,
1624 struct smb_file_time *ft)
1625 {
1626 time_t timestamp = 0;
1627 char *stripped = NULL;
1628 int saved_errno = 0;
1629 int ret;
1630 struct smb_filename *conv;
1631
1632 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1633 smb_fname->base_name,
1634 &timestamp, &stripped)) {
1635 return -1;
1636 }
1637 if (timestamp == 0) {
1638 return SMB_VFS_NEXT_NTIMES(handle, smb_fname, ft);
1639 }
1640 conv = cp_smb_filename(talloc_tos(), smb_fname);
1641 if (conv == NULL) {
1642 errno = ENOMEM;
1643 return -1;
1644 }
1645 conv->base_name = shadow_copy2_convert(
1646 conv, handle, stripped, timestamp);
1647 TALLOC_FREE(stripped);
1648 if (conv->base_name == NULL) {
1649 return -1;
1650 }
1651 ret = SMB_VFS_NEXT_NTIMES(handle, conv, ft);
1652 if (ret == -1) {
1653 saved_errno = errno;
1654 }
1655 TALLOC_FREE(conv);
1656 if (saved_errno != 0) {
1657 errno = saved_errno;
1658 }
1659 return ret;
1660 }
1661
1662 static int shadow_copy2_readlink(vfs_handle_struct *handle,
1663 const struct smb_filename *smb_fname,
1664 char *buf,
1665 size_t bufsiz)
1666 {
1667 time_t timestamp = 0;
1668 char *stripped = NULL;
1669 int saved_errno = 0;
1670 int ret;
1671 struct smb_filename *conv = NULL;
1672
1673 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1674 smb_fname->base_name,
1675 &timestamp, &stripped)) {
1676 return -1;
1677 }
1678 if (timestamp == 0) {
1679 return SMB_VFS_NEXT_READLINK(handle, smb_fname, buf, bufsiz);
1680 }
1681 conv = cp_smb_filename(talloc_tos(), smb_fname);
1682 if (conv == NULL) {
1683 TALLOC_FREE(stripped);
1684 errno = ENOMEM;
1685 return -1;
1686 }
1687 conv->base_name = shadow_copy2_convert(
1688 conv, handle, stripped, timestamp);
1689 TALLOC_FREE(stripped);
1690 if (conv->base_name == NULL) {
1691 return -1;
1692 }
1693 ret = SMB_VFS_NEXT_READLINK(handle, conv, buf, bufsiz);
1694 if (ret == -1) {
1695 saved_errno = errno;
1696 }
1697 TALLOC_FREE(conv);
1698 if (saved_errno != 0) {
1699 errno = saved_errno;
1700 }
1701 return ret;
1702 }
1703
1704 static int shadow_copy2_mknod(vfs_handle_struct *handle,
1705 const struct smb_filename *smb_fname,
1706 mode_t mode,
1707 SMB_DEV_T dev)
1708 {
1709 time_t timestamp = 0;
1710 char *stripped = NULL;
1711 int saved_errno = 0;
1712 int ret;
1713 struct smb_filename *conv = NULL;
1714
1715 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1716 smb_fname->base_name,
1717 &timestamp, &stripped)) {
1718 return -1;
1719 }
1720 if (timestamp == 0) {
1721 return SMB_VFS_NEXT_MKNOD(handle, smb_fname, mode, dev);
1722 }
1723 conv = cp_smb_filename(talloc_tos(), smb_fname);
1724 if (conv == NULL) {
1725 errno = ENOMEM;
1726 return -1;
1727 }
1728 conv->base_name = shadow_copy2_convert(
1729 conv, handle, stripped, timestamp);
1730 TALLOC_FREE(stripped);
1731 if (conv->base_name == NULL) {
1732 return -1;
1733 }
1734 ret = SMB_VFS_NEXT_MKNOD(handle, conv, mode, dev);
1735 if (ret == -1) {
1736 saved_errno = errno;
1737 }
1738 TALLOC_FREE(conv);
1739 if (saved_errno != 0) {
1740 errno = saved_errno;
1741 }
1742 return ret;
1743 }
1744
1745 static struct smb_filename *shadow_copy2_realpath(vfs_handle_struct *handle,
1746 TALLOC_CTX *ctx,
1747 const struct smb_filename *smb_fname)
1748 {
1749 time_t timestamp = 0;
1750 char *stripped = NULL;
1751 struct smb_filename *result_fname = NULL;
1752 struct smb_filename *conv_fname = NULL;
1753 int saved_errno = 0;
1754
1755 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1756 smb_fname->base_name,
1757 &timestamp, &stripped)) {
1758 goto done;
1759 }
1760 if (timestamp == 0) {
1761 return SMB_VFS_NEXT_REALPATH(handle, ctx, smb_fname);
1762 }
1763
1764 conv_fname = cp_smb_filename(talloc_tos(), smb_fname);
1765 if (conv_fname == NULL) {
1766 goto done;
1767 }
1768 conv_fname->base_name = shadow_copy2_convert(
1769 conv_fname, handle, stripped, timestamp);
1770 if (conv_fname->base_name == NULL) {
1771 goto done;
1772 }
1773
1774 result_fname = SMB_VFS_NEXT_REALPATH(handle, ctx, conv_fname);
1775
1776 done:
1777 if (result_fname == NULL) {
1778 saved_errno = errno;
1779 }
1780 TALLOC_FREE(conv_fname);
1781 TALLOC_FREE(stripped);
1782 if (saved_errno != 0) {
1783 errno = saved_errno;
1784 }
1785 return result_fname;
1786 }
1787
1788 /**
1789 * Check whether a given directory contains a
1790 * snapshot directory as direct subdirectory.
1791 * If yes, return the path of the snapshot-subdir,
1792 * otherwise return NULL.
1793 */
1794 static char *have_snapdir(struct vfs_handle_struct *handle,
1795 const char *path)
1796 {
1797 struct smb_filename smb_fname;
1798 int ret;
1799 struct shadow_copy2_private *priv;
1800
1801 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1802 return NULL);
1803
1804 ZERO_STRUCT(smb_fname);
1805 smb_fname.base_name = talloc_asprintf(talloc_tos(), "%s/%s",
1806 path, priv->config->snapdir);
1807 if (smb_fname.base_name == NULL) {
1808 return NULL;
1809 }
1810
1811 ret = SMB_VFS_NEXT_STAT(handle, &smb_fname);
1812 if ((ret == 0) && (S_ISDIR(smb_fname.st.st_ex_mode))) {
1813 return smb_fname.base_name;
1814 }
1815 TALLOC_FREE(smb_fname.base_name);
1816 return NULL;
1817 }
1818
1819 static bool check_access_snapdir(struct vfs_handle_struct *handle,
1820 const char *path)
1821 {
1822 struct smb_filename smb_fname;
1823 int ret;
1824 NTSTATUS status;
1825
1826 ZERO_STRUCT(smb_fname);
1827 smb_fname.base_name = talloc_asprintf(talloc_tos(),
1828 "%s",
1829 path);
1830 if (smb_fname.base_name == NULL) {
1831 return false;
1832 }
1833
1834 ret = SMB_VFS_NEXT_STAT(handle, &smb_fname);
1835 if (ret != 0 || !S_ISDIR(smb_fname.st.st_ex_mode)) {
1836 TALLOC_FREE(smb_fname.base_name);
1837 return false;
1838 }
1839
1840 status = smbd_check_access_rights(handle->conn,
1841 &smb_fname,
1842 false,
1843 SEC_DIR_LIST);
1844 if (!NT_STATUS_IS_OK(status)) {
1845 DEBUG(0,("user does not have list permission "
1846 "on snapdir %s\n",
1847 smb_fname.base_name));
1848 TALLOC_FREE(smb_fname.base_name);
1849 return false;
1850 }
1851 TALLOC_FREE(smb_fname.base_name);
1852 return true;
1853 }
1854
1855 /**
1856 * Find the snapshot directory (if any) for the given
1857 * filename (which is relative to the share).
1858 */
1859 static const char *shadow_copy2_find_snapdir(TALLOC_CTX *mem_ctx,
1860 struct vfs_handle_struct *handle,
1861 struct smb_filename *smb_fname)
1862 {
1863 char *path, *p;
1864 const char *snapdir;
1865 struct shadow_copy2_config *config;
1866 struct shadow_copy2_private *priv;
1867
1868 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1869 return NULL);
1870
1871 config = priv->config;
1872
1873 /*
1874 * If the non-snapdisrseverywhere mode, we should not search!
1875 */
1876 if (!config->snapdirseverywhere) {
1877 return config->snapshot_basepath;
1878 }
1879
1880 path = talloc_asprintf(mem_ctx, "%s/%s",
1881 handle->conn->connectpath,
1882 smb_fname->base_name);
1883 if (path == NULL) {
1884 return NULL;
1885 }
1886
1887 snapdir = have_snapdir(handle, path);
1888 if (snapdir != NULL) {
1889 TALLOC_FREE(path);
1890 return snapdir;
1891 }
1892
1893 while ((p = strrchr(path, '/')) && (p > path)) {
1894
1895 p[0] = '\0';
1896
1897 snapdir = have_snapdir(handle, path);
1898 if (snapdir != NULL) {
1899 TALLOC_FREE(path);
1900 return snapdir;
1901 }
1902 }
1903 TALLOC_FREE(path);
1904 return NULL;
1905 }
1906
1907 static bool shadow_copy2_snapshot_to_gmt(vfs_handle_struct *handle,
1908 const char *name,
1909 char *gmt, size_t gmt_len)
1910 {
1911 struct tm timestamp;
1912 time_t timestamp_t;
1913 unsigned long int timestamp_long;
1914 const char *fmt;
1915 struct shadow_copy2_config *config;
1916 struct shadow_copy2_private *priv;
1917 char *tmpstr = NULL;
1918 char *tmp = NULL;
1919 bool converted = false;
1920 int ret = -1;
1921
1922 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1923 return NULL);
1924
1925 config = priv->config;
1926
1927 fmt = config->gmt_format;
1928
1929 /*
1930 * If regex is provided, then we will have to parse the
1931 * filename which will contain both the prefix and the time format.
1932 * e.g. <prefix><delimiter><time_format>
1933 */
1934 if (priv->snaps->regex != NULL) {
1935 tmpstr = talloc_strdup(talloc_tos(), name);
1936 /* point "name" to the time format */
1937 name = strstr(name, priv->config->delimiter);
1938 if (name == NULL) {
1939 goto done;
1940 }
1941 /* Extract the prefix */
1942 tmp = strstr(tmpstr, priv->config->delimiter);
1943 if (tmp == NULL) {
1944 goto done;
1945 }
1946 *tmp = '\0';
1947
1948 /* Parse regex */
1949 ret = regexec(priv->snaps->regex, tmpstr, 0, NULL, 0);
1950 if (ret) {
1951 DBG_DEBUG("shadow_copy2_snapshot_to_gmt: "
1952 "no regex match for %s\n", tmpstr);
1953 goto done;
1954 }
1955 }
1956
1957 ZERO_STRUCT(timestamp);
1958 if (config->use_sscanf) {
1959 if (sscanf(name, fmt, &timestamp_long) != 1) {
1960 DEBUG(10, ("shadow_copy2_snapshot_to_gmt: "
1961 "no sscanf match %s: %s\n",
1962 fmt, name));
1963 goto done;
1964 }
1965 timestamp_t = timestamp_long;
1966 gmtime_r(&timestamp_t, &timestamp);
1967 } else {
1968 if (strptime(name, fmt, &timestamp) == NULL) {
1969 DEBUG(10, ("shadow_copy2_snapshot_to_gmt: "
1970 "no match %s: %s\n",
1971 fmt, name));
1972 goto done;
1973 }
1974 DEBUG(10, ("shadow_copy2_snapshot_to_gmt: match %s: %s\n",
1975 fmt, name));
1976
1977 if (config->use_localtime) {
1978 timestamp.tm_isdst = -1;
1979 timestamp_t = mktime(&timestamp);
1980 gmtime_r(&timestamp_t, &timestamp);
1981 }
1982 }
1983
1984 strftime(gmt, gmt_len, GMT_FORMAT, &timestamp);
1985 converted = true;
1986
1987 done:
1988 TALLOC_FREE(tmpstr);
1989 return converted;
1990 }
1991
1992 static int shadow_copy2_label_cmp_asc(const void *x, const void *y)
1993 {
1994 return strncmp((const char *)x, (const char *)y, sizeof(SHADOW_COPY_LABEL));
1995 }
1996
1997 static int shadow_copy2_label_cmp_desc(const void *x, const void *y)
1998 {
1999 return -strncmp((const char *)x, (const char *)y, sizeof(SHADOW_COPY_LABEL));
2000 }
2001
2002 /*
2003 sort the shadow copy data in ascending or descending order
2004 */
2005 static void shadow_copy2_sort_data(vfs_handle_struct *handle,
2006 struct shadow_copy_data *shadow_copy2_data)
2007 {
2008 int (*cmpfunc)(const void *, const void *);
2009 const char *sort;
2010 struct shadow_copy2_private *priv;
2011
2012 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2013 return);
2014
2015 sort = priv->config->sort_order;
2016 if (sort == NULL) {
2017 return;
2018 }
2019
2020 if (strcmp(sort, "asc") == 0) {
2021 cmpfunc = shadow_copy2_label_cmp_asc;
2022 } else if (strcmp(sort, "desc") == 0) {
2023 cmpfunc = shadow_copy2_label_cmp_desc;
2024 } else {
2025 return;
2026 }
2027
2028 if (shadow_copy2_data && shadow_copy2_data->num_volumes > 0 &&
2029 shadow_copy2_data->labels)
2030 {
2031 TYPESAFE_QSORT(shadow_copy2_data->labels,
2032 shadow_copy2_data->num_volumes,
2033 cmpfunc);
2034 }
2035 }
2036
2037 static int shadow_copy2_get_shadow_copy_data(
2038 vfs_handle_struct *handle, files_struct *fsp,
2039 struct shadow_copy_data *shadow_copy2_data,
2040 bool labels)
2041 {
2042 DIR *p;
2043 const char *snapdir;
2044 struct smb_filename *snapdir_smb_fname = NULL;
2045 struct dirent *d;
2046 TALLOC_CTX *tmp_ctx = talloc_stackframe();
2047 struct shadow_copy2_private *priv = NULL;
2048 struct shadow_copy2_snapentry *tmpentry = NULL;
2049 bool get_snaplist = false;
2050 bool access_granted = false;
2051 int ret = -1;
2052
2053 snapdir = shadow_copy2_find_snapdir(tmp_ctx, handle, fsp->fsp_name);
2054 if (snapdir == NULL) {
2055 DEBUG(0,("shadow:snapdir not found for %s in get_shadow_copy_data\n",
2056 handle->conn->connectpath));
2057 errno = EINVAL;
2058 goto done;
2059 }
2060
2061 access_granted = check_access_snapdir(handle, snapdir);
2062 if (!access_granted) {
2063 DEBUG(0,("access denied on listing snapdir %s\n", snapdir));
2064 errno = EACCES;
2065 goto done;
2066 }
2067
2068 snapdir_smb_fname = synthetic_smb_fname(talloc_tos(),
2069 snapdir,
2070 NULL,
2071 NULL,
2072 fsp->fsp_name->flags);
2073 if (snapdir_smb_fname == NULL) {
2074 errno = ENOMEM;
2075 goto done;
2076 }
2077
2078 p = SMB_VFS_NEXT_OPENDIR(handle, snapdir_smb_fname, NULL, 0);
2079
2080 if (!p) {
2081 DEBUG(2,("shadow_copy2: SMB_VFS_NEXT_OPENDIR() failed for '%s'"
2082 " - %s\n", snapdir, strerror(errno)));
2083 errno = ENOSYS;
2084 goto done;
2085 }
2086
2087 if (shadow_copy2_data != NULL) {
2088 shadow_copy2_data->num_volumes = 0;
2089 shadow_copy2_data->labels = NULL;
2090 }
2091
2092 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2093 goto done);
2094
2095 /*
2096 * Normally this function is called twice once with labels = false and
2097 * then with labels = true. When labels is false it will return the
2098 * number of volumes so that the caller can allocate memory for that
2099 * many labels. Therefore to eliminate snaplist both the times it is
2100 * good to check if labels is set or not.
2101 *
2102 * shadow_copy2_data is NULL when we only want to update the list and
2103 * don't want any labels.
2104 */
2105 if ((priv->snaps->regex != NULL) && (labels || shadow_copy2_data == NULL)) {
2106 get_snaplist = true;
2107 /* Reset the global snaplist */
2108 shadow_copy2_delete_snaplist(priv);
2109
2110 /* Set the current time as snaplist update time */
2111 time(&(priv->snaps->fetch_time));
2112 }
2113
2114 while ((d = SMB_VFS_NEXT_READDIR(handle, p, NULL))) {
2115 char snapshot[GMT_NAME_LEN+1];
2116 SHADOW_COPY_LABEL *tlabels;
2117
2118 /*
2119 * ignore names not of the right form in the snapshot
2120 * directory
2121 */
2122 if (!shadow_copy2_snapshot_to_gmt(
2123 handle, d->d_name,
2124 snapshot, sizeof(snapshot))) {
2125
2126 DEBUG(6, ("shadow_copy2_get_shadow_copy_data: "
2127 "ignoring %s\n", d->d_name));
2128 continue;
2129 }
2130 DEBUG(6,("shadow_copy2_get_shadow_copy_data: %s -> %s\n",
2131 d->d_name, snapshot));
2132
2133 if (get_snaplist) {
2134 /*
2135 * Create a snap entry for each successful
2136 * pattern match.
2137 */
2138 tmpentry = shadow_copy2_create_snapentry(priv);
2139 if (tmpentry == NULL) {
2140 DBG_ERR("talloc_zero() failed\n");
2141 goto done;
2142 }
2143 tmpentry->snapname = talloc_strdup(tmpentry, d->d_name);
2144 tmpentry->time_fmt = talloc_strdup(tmpentry, snapshot);
2145 }
2146
2147 if (shadow_copy2_data == NULL) {
2148 continue;
2149 }
2150
2151 if (!labels) {
2152 /* the caller doesn't want the labels */
2153 shadow_copy2_data->num_volumes++;
2154 continue;
2155 }
2156
2157 tlabels = talloc_realloc(shadow_copy2_data,
2158 shadow_copy2_data->labels,
2159 SHADOW_COPY_LABEL,
2160 shadow_copy2_data->num_volumes+1);
2161 if (tlabels == NULL) {
2162 DEBUG(0,("shadow_copy2: out of memory\n"));
2163 SMB_VFS_NEXT_CLOSEDIR(handle, p);
2164 goto done;
2165 }
2166
2167 strlcpy(tlabels[shadow_copy2_data->num_volumes], snapshot,
2168 sizeof(*tlabels));
2169
2170 shadow_copy2_data->num_volumes++;
2171 shadow_copy2_data->labels = tlabels;
2172 }
2173
2174 SMB_VFS_NEXT_CLOSEDIR(handle,p);
2175
2176 shadow_copy2_sort_data(handle, shadow_copy2_data);
2177 ret = 0;
2178
2179 done:
2180 TALLOC_FREE(tmp_ctx);
2181 return ret;
2182 }
2183
2184 static NTSTATUS shadow_copy2_fget_nt_acl(vfs_handle_struct *handle,
2185 struct files_struct *fsp,
2186 uint32_t security_info,
2187 TALLOC_CTX *mem_ctx,
2188 struct security_descriptor **ppdesc)
2189 {
2190 time_t timestamp = 0;
2191 char *stripped = NULL;
2192 NTSTATUS status;
2193 char *conv;
2194 struct smb_filename *smb_fname = NULL;
2195
2196 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
2197 fsp->fsp_name->base_name,
2198 &timestamp, &stripped)) {
2199 return map_nt_error_from_unix(errno);
2200 }
2201 if (timestamp == 0) {
2202 return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp, security_info,
2203 mem_ctx,
2204 ppdesc);
2205 }
2206 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2207 TALLOC_FREE(stripped);
2208 if (conv == NULL) {
2209 return map_nt_error_from_unix(errno);
2210 }
2211 smb_fname = synthetic_smb_fname(talloc_tos(),
2212 conv,
2213 NULL,
2214 NULL,
2215 fsp->fsp_name->flags);
2216 if (smb_fname == NULL) {
2217 TALLOC_FREE(conv);
2218 return NT_STATUS_NO_MEMORY;
2219 }
2220
2221 status = SMB_VFS_NEXT_GET_NT_ACL(handle, smb_fname, security_info,
2222 mem_ctx, ppdesc);
2223 TALLOC_FREE(conv);
2224 TALLOC_FREE(smb_fname);
2225 return status;
2226 }
2227
2228 static NTSTATUS shadow_copy2_get_nt_acl(vfs_handle_struct *handle,
2229 const struct smb_filename *smb_fname,
2230 uint32_t security_info,
2231 TALLOC_CTX *mem_ctx,
2232 struct security_descriptor **ppdesc)
2233 {
2234 time_t timestamp = 0;
2235 char *stripped = NULL;
2236 NTSTATUS status;
2237 char *conv;
2238 struct smb_filename *conv_smb_fname = NULL;
2239
2240 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2241 handle,
2242 smb_fname->base_name,
2243 &timestamp,
2244 &stripped)) {
2245 return map_nt_error_from_unix(errno);
2246 }
2247 if (timestamp == 0) {
2248 return SMB_VFS_NEXT_GET_NT_ACL(handle, smb_fname, security_info,
2249 mem_ctx, ppdesc);
2250 }
2251 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2252 TALLOC_FREE(stripped);
2253 if (conv == NULL) {
2254 return map_nt_error_from_unix(errno);
2255 }
2256 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2257 conv,
2258 NULL,
2259 NULL,
2260 smb_fname->flags);
2261 if (conv_smb_fname == NULL) {
2262 TALLOC_FREE(conv);
2263 return NT_STATUS_NO_MEMORY;
2264 }
2265 status = SMB_VFS_NEXT_GET_NT_ACL(handle, conv_smb_fname, security_info,
2266 mem_ctx, ppdesc);
2267 TALLOC_FREE(conv);
2268 TALLOC_FREE(conv_smb_fname);
2269 return status;
2270 }
2271
2272 static int shadow_copy2_mkdir(vfs_handle_struct *handle,
2273 const struct smb_filename *smb_fname,
2274 mode_t mode)
2275 {
2276 time_t timestamp = 0;
2277 char *stripped = NULL;
2278 int saved_errno = 0;
2279 int ret;
2280 char *conv;
2281 struct smb_filename *conv_smb_fname = NULL;
2282
2283 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2284 handle,
2285 smb_fname->base_name,
2286 &timestamp,
2287 &stripped)) {
2288 return -1;
2289 }
2290 if (timestamp == 0) {
2291 return SMB_VFS_NEXT_MKDIR(handle, smb_fname, mode);
2292 }
2293 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2294 TALLOC_FREE(stripped);
2295 if (conv == NULL) {
2296 return -1;
2297 }
2298 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2299 conv,
2300 NULL,
2301 NULL,
2302 smb_fname->flags);
2303 if (conv_smb_fname == NULL) {
2304 TALLOC_FREE(conv);
2305 return -1;
2306 }
2307 ret = SMB_VFS_NEXT_MKDIR(handle, conv_smb_fname, mode);
2308 if (ret == -1) {
2309 saved_errno = errno;
2310 }
2311 TALLOC_FREE(conv);
2312 TALLOC_FREE(conv_smb_fname);
2313 if (saved_errno != 0) {
2314 errno = saved_errno;
2315 }
2316 return ret;
2317 }
2318
2319 static int shadow_copy2_rmdir(vfs_handle_struct *handle,
2320 const struct smb_filename *smb_fname)
2321 {
2322 time_t timestamp = 0;
2323 char *stripped = NULL;
2324 int saved_errno = 0;
2325 int ret;
2326 char *conv;
2327 struct smb_filename *conv_smb_fname = NULL;
2328
2329 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2330 handle,
2331 smb_fname->base_name,
2332 &timestamp,
2333 &stripped)) {
2334 return -1;
2335 }
2336 if (timestamp == 0) {
2337 return SMB_VFS_NEXT_RMDIR(handle, smb_fname);
2338 }
2339 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2340 TALLOC_FREE(stripped);
2341 if (conv == NULL) {
2342 return -1;
2343 }
2344 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2345 conv,
2346 NULL,
2347 NULL,
2348 smb_fname->flags);
2349 if (conv_smb_fname == NULL) {
2350 TALLOC_FREE(conv);
2351 return -1;
2352 }
2353 ret = SMB_VFS_NEXT_RMDIR(handle, conv_smb_fname);
2354 if (ret == -1) {
2355 saved_errno = errno;
2356 }
2357 TALLOC_FREE(conv_smb_fname);
2358 TALLOC_FREE(conv);
2359 if (saved_errno != 0) {
2360 errno = saved_errno;
2361 }
2362 return ret;
2363 }
2364
2365 static int shadow_copy2_chflags(vfs_handle_struct *handle,
2366 const struct smb_filename *smb_fname,
2367 unsigned int flags)
2368 {
2369 time_t timestamp = 0;
2370 char *stripped = NULL;
2371 int saved_errno = 0;
2372 int ret;
2373 char *conv;
2374 struct smb_filename *conv_smb_fname = NULL;
2375
2376 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2377 handle,
2378 smb_fname->base_name,
2379 &timestamp,
2380 &stripped)) {
2381 return -1;
2382 }
2383 if (timestamp == 0) {
2384 return SMB_VFS_NEXT_CHFLAGS(handle, smb_fname, flags);
2385 }
2386 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2387 TALLOC_FREE(stripped);
2388 if (conv == NULL) {
2389 return -1;
2390 }
2391 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2392 conv,
2393 NULL,
2394 NULL,
2395 smb_fname->flags);
2396 if (conv_smb_fname == NULL) {
2397 TALLOC_FREE(conv);
2398 return -1;
2399 }
2400 ret = SMB_VFS_NEXT_CHFLAGS(handle, smb_fname, flags);
2401 if (ret == -1) {
2402 saved_errno = errno;
2403 }
2404 TALLOC_FREE(conv_smb_fname);
2405 TALLOC_FREE(conv);
2406 if (saved_errno != 0) {
2407 errno = saved_errno;
2408 }
2409 return ret;
2410 }
2411
2412 static ssize_t shadow_copy2_getxattr(vfs_handle_struct *handle,
2413 const struct smb_filename *smb_fname,
2414 const char *aname,
2415 void *value,
2416 size_t size)
2417 {
2418 time_t timestamp = 0;
2419 char *stripped = NULL;
2420 ssize_t ret;
2421 int saved_errno = 0;
2422 char *conv;
2423 struct smb_filename *conv_smb_fname = NULL;
2424
2425 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2426 handle,
2427 smb_fname->base_name,
2428 &timestamp,
2429 &stripped)) {
2430 return -1;
2431 }
2432 if (timestamp == 0) {
2433 return SMB_VFS_NEXT_GETXATTR(handle, smb_fname, aname, value,
2434 size);
2435 }
2436 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2437 TALLOC_FREE(stripped);
2438 if (conv == NULL) {
2439 return -1;
2440 }
2441
2442 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2443 conv,
2444 NULL,
2445 NULL,
2446 smb_fname->flags);
2447 if (conv_smb_fname == NULL) {
2448 TALLOC_FREE(conv);
2449 return -1;
2450 }
2451
2452 ret = SMB_VFS_NEXT_GETXATTR(handle, conv_smb_fname, aname, value, size);
2453 if (ret == -1) {
2454 saved_errno = errno;
2455 }
2456 TALLOC_FREE(conv_smb_fname);
2457 TALLOC_FREE(conv);
2458 if (saved_errno != 0) {
2459 errno = saved_errno;
2460 }
2461 return ret;
2462 }
2463
2464 static ssize_t shadow_copy2_listxattr(struct vfs_handle_struct *handle,
2465 const struct smb_filename *smb_fname,
2466 char *list, size_t size)
2467 {
2468 time_t timestamp = 0;
2469 char *stripped = NULL;
2470 ssize_t ret;
2471 int saved_errno = 0;
2472 char *conv;
2473 struct smb_filename *conv_smb_fname = NULL;
2474
2475 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2476 handle,
2477 smb_fname->base_name,
2478 &timestamp,
2479 &stripped)) {
2480 return -1;
2481 }
2482 if (timestamp == 0) {
2483 return SMB_VFS_NEXT_LISTXATTR(handle, smb_fname, list, size);
2484 }
2485 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2486 TALLOC_FREE(stripped);
2487 if (conv == NULL) {
2488 return -1;
2489 }
2490 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2491 conv,
2492 NULL,
2493 NULL,
2494 smb_fname->flags);
2495 if (conv_smb_fname == NULL) {
2496 TALLOC_FREE(conv);
2497 return -1;
2498 }
2499 ret = SMB_VFS_NEXT_LISTXATTR(handle, conv_smb_fname, list, size);
2500 if (ret == -1) {
2501 saved_errno = errno;
2502 }
2503 TALLOC_FREE(conv_smb_fname);
2504 TALLOC_FREE(conv);
2505 if (saved_errno != 0) {
2506 errno = saved_errno;
2507 }
2508 return ret;
2509 }
2510
2511 static int shadow_copy2_removexattr(vfs_handle_struct *handle,
2512 const struct smb_filename *smb_fname,
2513 const char *aname)
2514 {
2515 time_t timestamp = 0;
2516 char *stripped = NULL;
2517 int saved_errno = 0;
2518 int ret;
2519 char *conv;
2520 struct smb_filename *conv_smb_fname = NULL;
2521
2522 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2523 handle,
2524 smb_fname->base_name,
2525 &timestamp,
2526 &stripped)) {
2527 return -1;
2528 }
2529 if (timestamp == 0) {
2530 return SMB_VFS_NEXT_REMOVEXATTR(handle, smb_fname, aname);
2531 }
2532 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2533 TALLOC_FREE(stripped);
2534 if (conv == NULL) {
2535 return -1;
2536 }
2537 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2538 conv,
2539 NULL,
2540 NULL,
2541 smb_fname->flags);
2542 if (conv_smb_fname == NULL) {
2543 TALLOC_FREE(conv);
2544 return -1;
2545 }
2546 ret = SMB_VFS_NEXT_REMOVEXATTR(handle, conv_smb_fname, aname);
2547 if (ret == -1) {
2548 saved_errno = errno;
2549 }
2550 TALLOC_FREE(conv_smb_fname);
2551 TALLOC_FREE(conv);
2552 if (saved_errno != 0) {
2553 errno = saved_errno;
2554 }
2555 return ret;
2556 }
2557
2558 static int shadow_copy2_setxattr(struct vfs_handle_struct *handle,
2559 const struct smb_filename *smb_fname,
2560 const char *aname, const void *value,
2561 size_t size, int flags)
2562 {
2563 time_t timestamp = 0;
2564 char *stripped = NULL;
2565 ssize_t ret;
2566 int saved_errno = 0;
2567 char *conv;
2568 struct smb_filename *conv_smb_fname = NULL;
2569
2570 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2571 handle,
2572 smb_fname->base_name,
2573 &timestamp,
2574 &stripped)) {
2575 return -1;
2576 }
2577 if (timestamp == 0) {
2578 return SMB_VFS_NEXT_SETXATTR(handle, smb_fname,
2579 aname, value, size, flags);
2580 }
2581 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2582 TALLOC_FREE(stripped);
2583 if (conv == NULL) {
2584 return -1;
2585 }
2586 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2587 conv,
2588 NULL,
2589 NULL,
2590 smb_fname->flags);
2591 if (conv_smb_fname == NULL) {
2592 TALLOC_FREE(conv);
2593 return -1;
2594 }
2595 ret = SMB_VFS_NEXT_SETXATTR(handle, conv_smb_fname,
2596 aname, value, size, flags);
2597 if (ret == -1) {
2598 saved_errno = errno;
2599 }
2600 TALLOC_FREE(conv_smb_fname);
2601 TALLOC_FREE(conv);
2602 if (saved_errno != 0) {
2603 errno = saved_errno;
2604 }
2605 return ret;
2606 }
2607
2608 static int shadow_copy2_chmod_acl(vfs_handle_struct *handle,
2609 const struct smb_filename *smb_fname,
2610 mode_t mode)
2611 {
2612 time_t timestamp = 0;
2613 char *stripped = NULL;
2614 ssize_t ret;
2615 int saved_errno = 0;
2616 char *conv = NULL;
2617 struct smb_filename *conv_smb_fname = NULL;
2618
2619 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2620 handle,
2621 smb_fname->base_name,
2622 &timestamp,
2623 &stripped)) {
2624 return -1;
2625 }
2626 if (timestamp == 0) {
2627 return SMB_VFS_NEXT_CHMOD_ACL(handle, smb_fname, mode);
2628 }
2629 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2630 TALLOC_FREE(stripped);
2631 if (conv == NULL) {
2632 return -1;
2633 }
2634 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2635 conv,
2636 NULL,
2637 NULL,
2638 smb_fname->flags);
2639 if (conv_smb_fname == NULL) {
2640 TALLOC_FREE(conv);
2641 errno = ENOMEM;
2642 return -1;
2643 }
2644 ret = SMB_VFS_NEXT_CHMOD_ACL(handle, conv_smb_fname, mode);
2645 if (ret == -1) {
2646 saved_errno = errno;
2647 }
2648 TALLOC_FREE(conv);
2649 TALLOC_FREE(conv_smb_fname);
2650 if (saved_errno != 0) {
2651 errno = saved_errno;
2652 }
2653 return ret;
2654 }
2655
2656 static int shadow_copy2_get_real_filename(struct vfs_handle_struct *handle,
2657 const char *path,
2658 const char *name,
2659 TALLOC_CTX *mem_ctx,
2660 char **found_name)
2661 {
2662 time_t timestamp = 0;
2663 char *stripped = NULL;
2664 ssize_t ret;
2665 int saved_errno = 0;
2666 char *conv;
2667
2668 DEBUG(10, ("shadow_copy2_get_real_filename called for path=[%s], "
2669 "name=[%s]\n", path, name));
2670
2671 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, path,
2672 &timestamp, &stripped)) {
2673 DEBUG(10, ("shadow_copy2_strip_snapshot failed\n"));
2674 return -1;
2675 }
2676 if (timestamp == 0) {
2677 DEBUG(10, ("timestamp == 0\n"));
2678 return SMB_VFS_NEXT_GET_REAL_FILENAME(handle, path, name,
2679 mem_ctx, found_name);
2680 }
2681 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2682 TALLOC_FREE(stripped);
2683 if (conv == NULL) {
2684 DEBUG(10, ("shadow_copy2_convert failed\n"));
2685 return -1;
2686 }
2687 DEBUG(10, ("Calling NEXT_GET_REAL_FILE_NAME for conv=[%s], "
2688 "name=[%s]\n", conv, name));
2689 ret = SMB_VFS_NEXT_GET_REAL_FILENAME(handle, conv, name,
2690 mem_ctx, found_name);
2691 DEBUG(10, ("NEXT_REAL_FILE_NAME returned %d\n", (int)ret));
2692 if (ret == -1) {
2693 saved_errno = errno;
2694 }
2695 TALLOC_FREE(conv);
2696 if (saved_errno != 0) {
2697 errno = saved_errno;
2698 }
2699 return ret;
2700 }
2701
2702 static const char *shadow_copy2_connectpath(struct vfs_handle_struct *handle,
2703 const struct smb_filename *smb_fname_in)
2704 {
2705 time_t timestamp = 0;
2706 char *stripped = NULL;
2707 char *tmp = NULL;
2708 const char *fname = smb_fname_in->base_name;
2709 struct smb_filename smb_fname = {0};
2710 struct smb_filename *result_fname = NULL;
2711 char *result = NULL;
2712 char *parent_dir = NULL;
2713 int saved_errno = 0;
2714 size_t rootpath_len = 0;
2715 struct shadow_copy2_private *priv = NULL;
2716
2717 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2718 return NULL);
2719
2720 DBG_DEBUG("Calc connect path for [%s]\n", fname);
2721
2722 if (priv->shadow_connectpath != NULL) {
2723 DBG_DEBUG("cached connect path is [%s]\n",
2724 priv->shadow_connectpath);
2725 return priv->shadow_connectpath;
2726 }
2727
2728 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
2729 &timestamp, &stripped)) {
2730 goto done;
2731 }
2732 if (timestamp == 0) {
2733 return SMB_VFS_NEXT_CONNECTPATH(handle, smb_fname_in);
2734 }
2735
2736 tmp = shadow_copy2_do_convert(talloc_tos(), handle, stripped, timestamp,
2737 &rootpath_len);
2738 if (tmp == NULL) {
2739 if (errno != ENOENT) {
2740 goto done;
2741 }
2742
2743 /*
2744 * If the converted path does not exist, and converting
2745 * the parent yields something that does exist, then
2746 * this path refers to something that has not been
2747 * created yet, relative to the parent path.
2748 * The snapshot finding is relative to the parent.
2749 * (usually snapshots are read/only but this is not
2750 * necessarily true).
2751 * This code also covers getting a wildcard in the
2752 * last component, because this function is called
2753 * prior to sanitizing the path, and in SMB1 we may
2754 * get wildcards in path names.
2755 */
2756 if (!parent_dirname(talloc_tos(), stripped, &parent_dir,
2757 NULL)) {
2758 errno = ENOMEM;
2759 goto done;
2760 }
2761
2762 tmp = shadow_copy2_do_convert(talloc_tos(), handle, parent_dir,
2763 timestamp, &rootpath_len);
2764 if (tmp == NULL) {
2765 goto done;
2766 }
2767 }
2768
2769 DBG_DEBUG("converted path is [%s] root path is [%.*s]\n", tmp,
2770 (int)rootpath_len, tmp);
2771
2772 tmp[rootpath_len] = '\0';
2773 smb_fname = (struct smb_filename) { .base_name = tmp };
2774
2775 result_fname = SMB_VFS_NEXT_REALPATH(handle, priv, &smb_fname);
2776 if (result_fname == NULL) {
2777 goto done;
2778 }
2779
2780 /*
2781 * SMB_VFS_NEXT_REALPATH returns a talloc'ed string.
2782 * Don't leak memory.
2783 */
2784 TALLOC_FREE(priv->shadow_realpath);
2785 priv->shadow_realpath = result_fname;
2786 result = priv->shadow_realpath->base_name;
2787
2788 DBG_DEBUG("connect path is [%s]\n", result);
2789
2790 done:
2791 if (result == NULL) {
2792 saved_errno = errno;
2793 }
2794 TALLOC_FREE(tmp);
2795 TALLOC_FREE(stripped);
2796 TALLOC_FREE(parent_dir);
2797 if (saved_errno != 0) {
2798 errno = saved_errno;
2799 }
2800 return result;
2801 }
2802
2803 static uint64_t shadow_copy2_disk_free(vfs_handle_struct *handle,
2804 const struct smb_filename *smb_fname,
2805 uint64_t *bsize,
2806 uint64_t *dfree,
2807 uint64_t *dsize)
2808 {
2809 time_t timestamp = 0;
2810 char *stripped = NULL;
2811 int saved_errno = 0;
2812 char *conv = NULL;
2813 struct smb_filename *conv_smb_fname = NULL;
2814 uint64_t ret = (uint64_t)-1;
2815
2816 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2817 handle,
2818 smb_fname->base_name,
2819 &timestamp,
2820 &stripped)) {
2821 return (uint64_t)-1;
2822 }
2823 if (timestamp == 0) {
2824 return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname,
2825 bsize, dfree, dsize);
2826 }
2827 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2828 TALLOC_FREE(stripped);
2829 if (conv == NULL) {
2830 return (uint64_t)-1;
2831 }
2832 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2833 conv,
2834 NULL,
2835 NULL,
2836 smb_fname->flags);
2837 if (conv_smb_fname == NULL) {
2838 TALLOC_FREE(conv);
2839 return (uint64_t)-1;
2840 }
2841 ret = SMB_VFS_NEXT_DISK_FREE(handle, conv_smb_fname,
2842 bsize, dfree, dsize);
2843 if (ret == (uint64_t)-1) {
2844 saved_errno = errno;
2845 }
2846 TALLOC_FREE(conv);
2847 TALLOC_FREE(conv_smb_fname);
2848 if (saved_errno != 0) {
2849 errno = saved_errno;
2850 }
2851 return ret;
2852 }
2853
2854 static int shadow_copy2_get_quota(vfs_handle_struct *handle,
2855 const struct smb_filename *smb_fname,
2856 enum SMB_QUOTA_TYPE qtype,
2857 unid_t id,
2858 SMB_DISK_QUOTA *dq)
2859 {
2860 time_t timestamp = 0;
2861 char *stripped = NULL;
2862 int ret;
2863 int saved_errno = 0;
2864 char *conv;
2865 struct smb_filename *conv_smb_fname = NULL;
2866
2867 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2868 handle,
2869 smb_fname->base_name,
2870 &timestamp,
2871 &stripped)) {
2872 return -1;
2873 }
2874 if (timestamp == 0) {
2875 return SMB_VFS_NEXT_GET_QUOTA(handle, smb_fname, qtype, id, dq);
2876 }
2877
2878 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2879 TALLOC_FREE(stripped);
2880 if (conv == NULL) {
2881 return -1;
2882 }
2883 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2884 conv,
2885 NULL,
2886 NULL,
2887 smb_fname->flags);
2888 if (conv_smb_fname == NULL) {
2889 TALLOC_FREE(conv);
2890 return -1;
2891 }
2892 ret = SMB_VFS_NEXT_GET_QUOTA(handle, conv_smb_fname, qtype, id, dq);
2893
2894 if (ret == -1) {
2895 saved_errno = errno;
2896 }
2897 TALLOC_FREE(conv);
2898 TALLOC_FREE(conv_smb_fname);
2899 if (saved_errno != 0) {
2900 errno = saved_errno;
2901 }
2902
2903 return ret;
2904 }
2905
2906 static int shadow_copy2_connect(struct vfs_handle_struct *handle,
2907 const char *service, const char *user)
2908 {
2909 struct shadow_copy2_config *config;
2910 struct shadow_copy2_private *priv;
2911 int ret;
2912 const char *snapdir;
2913 const char *snapprefix = NULL;
2914 const char *delimiter;
2915 const char *gmt_format;
2916 const char *sort_order;
2917 const char *basedir = NULL;
2918 const char *snapsharepath = NULL;
2919 const char *mount_point;
2920
2921 DEBUG(10, (__location__ ": cnum[%u], connectpath[%s]\n",
2922 (unsigned)handle->conn->cnum,
2923 handle->conn->connectpath));
2924
2925 ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
2926 if (ret < 0) {
2927 return ret;
2928 }
2929
2930 priv = talloc_zero(handle->conn, struct shadow_copy2_private);
2931 if (priv == NULL) {
2932 DBG_ERR("talloc_zero() failed\n");
2933 errno = ENOMEM;
2934 return -1;
2935 }
2936
2937 priv->snaps = talloc_zero(priv, struct shadow_copy2_snaplist_info);
2938 if (priv->snaps == NULL) {
2939 DBG_ERR("talloc_zero() failed\n");
2940 errno = ENOMEM;
2941 return -1;
2942 }
2943
2944 config = talloc_zero(priv, struct shadow_copy2_config);
2945 if (config == NULL) {
2946 DEBUG(0, ("talloc_zero() failed\n"));
2947 errno = ENOMEM;
2948 return -1;
2949 }
2950
2951 priv->config = config;
2952
2953 gmt_format = lp_parm_const_string(SNUM(handle->conn),
2954 "shadow", "format",
2955 GMT_FORMAT);
2956 config->gmt_format = talloc_strdup(config, gmt_format);
2957 if (config->gmt_format == NULL) {
2958 DEBUG(0, ("talloc_strdup() failed\n"));
2959 errno = ENOMEM;
2960 return -1;
2961 }
2962
2963 /* config->gmt_format must not contain a path separator. */
2964 if (strchr(config->gmt_format, '/') != NULL) {
2965 DEBUG(0, ("shadow:format %s must not contain a /"
2966 "character. Unable to initialize module.\n",
2967 config->gmt_format));
2968 errno = EINVAL;
2969 return -1;
2970 }
2971
2972 config->use_sscanf = lp_parm_bool(SNUM(handle->conn),
2973 "shadow", "sscanf", false);
2974
2975 config->use_localtime = lp_parm_bool(SNUM(handle->conn),
2976 "shadow", "localtime",
2977 false);
2978
2979 snapdir = lp_parm_const_string(SNUM(handle->conn),
2980 "shadow", "snapdir",
2981 ".snapshots");
2982 config->snapdir = talloc_strdup(config, snapdir);
2983 if (config->snapdir == NULL) {
2984 DEBUG(0, ("talloc_strdup() failed\n"));
2985 errno = ENOMEM;
2986 return -1;
2987 }
2988
2989 snapprefix = lp_parm_const_string(SNUM(handle->conn),
2990 "shadow", "snapprefix",
2991 NULL);
2992 if (snapprefix != NULL) {
2993 priv->snaps->regex = talloc_zero(priv->snaps, regex_t);
2994 if (priv->snaps->regex == NULL) {
2995 DBG_ERR("talloc_zero() failed\n");
2996 errno = ENOMEM;
2997 return -1;
2998 }
2999
3000 /* pre-compute regex rule for matching pattern later */
3001 ret = regcomp(priv->snaps->regex, snapprefix, 0);
3002 if (ret) {
3003 DBG_ERR("Failed to create regex object\n");
3004 return -1;
3005 }
3006 }
3007
3008 delimiter = lp_parm_const_string(SNUM(handle->conn),
3009 "shadow", "delimiter",
3010 "_GMT");
3011 if (delimiter != NULL) {
3012 priv->config->delimiter = talloc_strdup(priv->config, delimiter);
3013 if (priv->config->delimiter == NULL) {
3014 DBG_ERR("talloc_strdup() failed\n");
3015 errno = ENOMEM;
3016 return -1;
3017 }
3018 }
3019
3020 config->snapdirseverywhere = lp_parm_bool(SNUM(handle->conn),
3021 "shadow",
3022 "snapdirseverywhere",
3023 false);
3024
3025 config->crossmountpoints = lp_parm_bool(SNUM(handle->conn),
3026 "shadow", "crossmountpoints",
3027 false);
3028
3029 if (config->crossmountpoints && !config->snapdirseverywhere) {
3030 DBG_WARNING("Warning: 'crossmountpoints' depends on "
3031 "'snapdirseverywhere'. Disabling crossmountpoints.\n");
3032 }
3033
3034 config->fixinodes = lp_parm_bool(SNUM(handle->conn),
3035 "shadow", "fixinodes",
3036 false);
3037
3038 sort_order = lp_parm_const_string(SNUM(handle->conn),
3039 "shadow", "sort", "desc");
3040 config->sort_order = talloc_strdup(config, sort_order);
3041 if (config->sort_order == NULL) {
3042 DEBUG(0, ("talloc_strdup() failed\n"));
3043 errno = ENOMEM;
3044 return -1;
3045 }
3046
3047 mount_point = lp_parm_const_string(SNUM(handle->conn),
3048 "shadow", "mountpoint", NULL);
3049 if (mount_point != NULL) {
3050 if (mount_point[0] != '/') {
3051 DEBUG(1, (__location__ " Warning: 'mountpoint' is "
3052 "relative ('%s'), but it has to be an "
3053 "absolute path. Ignoring provided value.\n",
3054 mount_point));
3055 mount_point = NULL;
3056 } else {
3057 char *p;
3058 p = strstr(handle->conn->connectpath, mount_point);
3059 if (p != handle->conn->connectpath) {
3060 DBG_WARNING("Warning: the share root (%s) is "
3061 "not a subdirectory of the "
3062 "specified mountpoint (%s). "
3063 "Ignoring provided value.\n",
3064 handle->conn->connectpath,
3065 mount_point);
3066 mount_point = NULL;
3067 }
3068 }
3069 }
3070
3071 if (mount_point != NULL) {
3072 config->mount_point = talloc_strdup(config, mount_point);
3073 if (config->mount_point == NULL) {
3074 DEBUG(0, (__location__ " talloc_strdup() failed\n"));
3075 return -1;
3076 }
3077 } else {
3078 config->mount_point = shadow_copy2_find_mount_point(config,
3079 handle);
3080 if (config->mount_point == NULL) {
3081 DBG_WARNING("shadow_copy2_find_mount_point "
3082 "of the share root '%s' failed: %s\n",
3083 handle->conn->connectpath, strerror(errno));
3084 return -1;
3085 }
3086 }
3087
3088 basedir = lp_parm_const_string(SNUM(handle->conn),
3089 "shadow", "basedir", NULL);
3090
3091 if (basedir != NULL) {
3092 if (basedir[0] != '/') {
3093 DEBUG(1, (__location__ " Warning: 'basedir' is "
3094 "relative ('%s'), but it has to be an "
3095 "absolute path. Disabling basedir.\n",
3096 basedir));
3097 basedir = NULL;
3098 } else {
3099 char *p;
3100 p = strstr(basedir, config->mount_point);
3101 if (p != basedir) {
3102 DEBUG(1, ("Warning: basedir (%s) is not a "
3103 "subdirectory of the share root's "
3104 "mount point (%s). "
3105 "Disabling basedir\n",
3106 basedir, config->mount_point));
3107 basedir = NULL;
3108 }
3109 }
3110 }
3111
3112 if (config->snapdirseverywhere && basedir != NULL) {
3113 DEBUG(1, (__location__ " Warning: 'basedir' is incompatible "
3114 "with 'snapdirseverywhere'. Disabling basedir.\n"));
3115 basedir = NULL;
3116 }
3117
3118 snapsharepath = lp_parm_const_string(SNUM(handle->conn), "shadow",
3119 "snapsharepath", NULL);
3120 if (snapsharepath != NULL) {
3121 if (snapsharepath[0] == '/') {
3122 DBG_WARNING("Warning: 'snapsharepath' is "
3123 "absolute ('%s'), but it has to be a "
3124 "relative path. Disabling snapsharepath.\n",
3125 snapsharepath);
3126 snapsharepath = NULL;
3127 }
3128 if (config->snapdirseverywhere && snapsharepath != NULL) {
3129 DBG_WARNING("Warning: 'snapsharepath' is incompatible "
3130 "with 'snapdirseverywhere'. Disabling "
3131 "snapsharepath.\n");
3132 snapsharepath = NULL;
3133 }
3134 }
3135
3136 if (basedir != NULL && snapsharepath != NULL) {
3137 DBG_WARNING("Warning: 'snapsharepath' is incompatible with "
3138 "'basedir'. Disabling snapsharepath\n");
3139 snapsharepath = NULL;
3140 }
3141
3142 if (snapsharepath != NULL) {
3143 config->rel_connectpath = talloc_strdup(config, snapsharepath);
3144 if (config->rel_connectpath == NULL) {
3145 DBG_ERR("talloc_strdup() failed\n");
3146 errno = ENOMEM;
3147 return -1;
3148 }
3149 }
3150
3151 if (basedir == NULL) {
3152 basedir = config->mount_point;
3153 }
3154
3155 if (config->rel_connectpath == NULL &&
3156 strlen(basedir) < strlen(handle->conn->connectpath)) {
3157 config->rel_connectpath = talloc_strdup(config,
3158 handle->conn->connectpath + strlen(basedir));
3159 if (config->rel_connectpath == NULL) {
3160 DEBUG(0, ("talloc_strdup() failed\n"));
3161 errno = ENOMEM;
3162 return -1;
3163 }
3164 }
3165
3166 if (config->snapdir[0] == '/') {
3167 config->snapdir_absolute = true;
3168
3169 if (config->snapdirseverywhere == true) {
3170 DEBUG(1, (__location__ " Warning: An absolute snapdir "
3171 "is incompatible with 'snapdirseverywhere', "
3172 "setting 'snapdirseverywhere' to false.\n"));
3173 config->snapdirseverywhere = false;
3174 }
3175
3176 if (config->crossmountpoints == true) {
3177 DEBUG(1, (__location__ " Warning: 'crossmountpoints' "
3178 "is not supported with an absolute snapdir. "
3179 "Disabling it.\n"));
3180 config->crossmountpoints = false;
3181 }
3182
3183 config->snapshot_basepath = config->snapdir;
3184 } else {
3185 config->snapshot_basepath = talloc_asprintf(config, "%s/%s",
3186 config->mount_point, config->snapdir);
3187 if (config->snapshot_basepath == NULL) {
3188 DEBUG(0, ("talloc_asprintf() failed\n"));
3189 errno = ENOMEM;
3190 return -1;
3191 }
3192 }
3193
3194 trim_string(config->mount_point, NULL, "/");
3195 trim_string(config->rel_connectpath, "/", "/");
3196 trim_string(config->snapdir, NULL, "/");
3197 trim_string(config->snapshot_basepath, NULL, "/");
3198
3199 DEBUG(10, ("shadow_copy2_connect: configuration:\n"
3200 " share root: '%s'\n"
3201 " mountpoint: '%s'\n"
3202 " rel share root: '%s'\n"
3203 " snapdir: '%s'\n"
3204 " snapprefix: '%s'\n"
3205 " delimiter: '%s'\n"
3206 " snapshot base path: '%s'\n"
3207 " format: '%s'\n"
3208 " use sscanf: %s\n"
3209 " snapdirs everywhere: %s\n"
3210 " cross mountpoints: %s\n"
3211 " fix inodes: %s\n"
3212 " sort order: %s\n"
3213 "",
3214 handle->conn->connectpath,
3215 config->mount_point,
3216 config->rel_connectpath,
3217 config->snapdir,
3218 snapprefix,
3219 config->delimiter,
3220 config->snapshot_basepath,
3221 config->gmt_format,
3222 config->use_sscanf ? "yes" : "no",
3223 config->snapdirseverywhere ? "yes" : "no",
3224 config->crossmountpoints ? "yes" : "no",
3225 config->fixinodes ? "yes" : "no",
3226 config->sort_order
3227 ));
3228
3229
3230 SMB_VFS_HANDLE_SET_DATA(handle, priv,
3231 NULL, struct shadow_copy2_private,
3232 return -1);
3233
3234 return 0;
3235 }
3236
3237 static struct vfs_fn_pointers vfs_shadow_copy2_fns = {
3238 .connect_fn = shadow_copy2_connect,
3239 .opendir_fn = shadow_copy2_opendir,
3240 .disk_free_fn = shadow_copy2_disk_free,
3241 .get_quota_fn = shadow_copy2_get_quota,
3242 .rename_fn = shadow_copy2_rename,
3243 .link_fn = shadow_copy2_link,
3244 .symlink_fn = shadow_copy2_symlink,
3245 .stat_fn = shadow_copy2_stat,
3246 .lstat_fn = shadow_copy2_lstat,
3247 .fstat_fn = shadow_copy2_fstat,
3248 .open_fn = shadow_copy2_open,
3249 .unlink_fn = shadow_copy2_unlink,
3250 .chmod_fn = shadow_copy2_chmod,
3251 .chown_fn = shadow_copy2_chown,
3252 .chdir_fn = shadow_copy2_chdir,
3253 .ntimes_fn = shadow_copy2_ntimes,
3254 .readlink_fn = shadow_copy2_readlink,
3255 .mknod_fn = shadow_copy2_mknod,
3256 .realpath_fn = shadow_copy2_realpath,
3257 .get_nt_acl_fn = shadow_copy2_get_nt_acl,
3258 .fget_nt_acl_fn = shadow_copy2_fget_nt_acl,
3259 .get_shadow_copy_data_fn = shadow_copy2_get_shadow_copy_data,
3260 .mkdir_fn = shadow_copy2_mkdir,
3261 .rmdir_fn = shadow_copy2_rmdir,
3262 .getxattr_fn = shadow_copy2_getxattr,
3263 .listxattr_fn = shadow_copy2_listxattr,
3264 .removexattr_fn = shadow_copy2_removexattr,
3265 .setxattr_fn = shadow_copy2_setxattr,
3266 .chmod_acl_fn = shadow_copy2_chmod_acl,
3267 .chflags_fn = shadow_copy2_chflags,
3268 .get_real_filename_fn = shadow_copy2_get_real_filename,
3269 .connectpath_fn = shadow_copy2_connectpath,
3270 };
3271
3272 static_decl_vfs;
3273 NTSTATUS vfs_shadow_copy2_init(TALLOC_CTX *ctx)
3274 {
3275 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
3276 "shadow_copy2", &vfs_shadow_copy2_fns);
3277 }
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