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selftest:Samba4: report when samba is started and ready
[Samba.git] / source3 / modules / vfs_shadow_copy2.c
blobe5def9669f48593200d845ceb7d384b47530d50b
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 #include "libcli/security/security.h"
40 #include "lib/util/tevent_unix.h"
41
42 struct shadow_copy2_config {
43 char *gmt_format;
44 bool use_sscanf;
45 bool use_localtime;
46 char *snapdir;
47 char *delimiter;
48 bool snapdirseverywhere;
49 bool crossmountpoints;
50 bool fixinodes;
51 char *sort_order;
52 bool snapdir_absolute;
53 char *mount_point;
54 char *rel_connectpath; /* share root, relative to a snapshot root */
55 char *snapshot_basepath; /* the absolute version of snapdir */
56 };
57
58 /* Data-structure to hold the list of snap entries */
59 struct shadow_copy2_snapentry {
60 char *snapname;
61 char *time_fmt;
62 struct shadow_copy2_snapentry *next;
63 struct shadow_copy2_snapentry *prev;
64 };
65
66 struct shadow_copy2_snaplist_info {
67 struct shadow_copy2_snapentry *snaplist; /* snapshot list */
68 regex_t *regex; /* Regex to filter snaps */
69 time_t fetch_time; /* snaplist update time */
70 };
71
72
73 /*
74 * shadow_copy2 private structure. This structure will be
75 * used to keep module specific information
76 */
77 struct shadow_copy2_private {
78 struct shadow_copy2_config *config;
79 struct shadow_copy2_snaplist_info *snaps;
80 char *shadow_cwd; /* Absolute $cwd path. */
81 /* Absolute connectpath - can vary depending on $cwd. */
82 char *shadow_connectpath;
83 /* talloc'ed realpath return. */
84 struct smb_filename *shadow_realpath;
85 };
86
87 static int shadow_copy2_get_shadow_copy_data(
88 vfs_handle_struct *handle, files_struct *fsp,
89 struct shadow_copy_data *shadow_copy2_data,
90 bool labels);
91
92 /**
93 *This function will create a new snapshot list entry and
94 * return to the caller. This entry will also be added to
95 * the global snapshot list.
96 *
97 * @param[in] priv shadow_copy2 specific data structure
98 * @return Newly created snapshot entry or NULL on failure
99 */
100 static struct shadow_copy2_snapentry *shadow_copy2_create_snapentry(
101 struct shadow_copy2_private *priv)
102 {
103 struct shadow_copy2_snapentry *tmpentry = NULL;
104
105 tmpentry = talloc_zero(priv->snaps, struct shadow_copy2_snapentry);
106 if (tmpentry == NULL) {
107 DBG_ERR("talloc_zero() failed\n");
108 errno = ENOMEM;
109 return NULL;
110 }
111
112 DLIST_ADD(priv->snaps->snaplist, tmpentry);
113
114 return tmpentry;
115 }
116
117 /**
118 *This function will delete the entire snaplist and reset
119 * priv->snaps->snaplist to NULL.
120 *
121 * @param[in] priv shadow_copye specific data structure
122 */
123 static void shadow_copy2_delete_snaplist(struct shadow_copy2_private *priv)
124 {
125 struct shadow_copy2_snapentry *tmp = NULL;
126
127 while ((tmp = priv->snaps->snaplist) != NULL) {
128 DLIST_REMOVE(priv->snaps->snaplist, tmp);
129 talloc_free(tmp);
130 }
131 }
132
133 /**
134 * Given a timestamp this function searches the global snapshot list
135 * and returns the complete snapshot directory name saved in the entry.
136 *
137 * @param[in] priv shadow_copy2 specific structure
138 * @param[in] timestamp timestamp corresponding to one of the snapshot
139 * @param[out] snap_str buffer to copy the actual snapshot name
140 * @param[in] len length of snap_str buffer
141 *
142 * @return Length of actual snapshot name, and -1 on failure
143 */
144 static ssize_t shadow_copy2_saved_snapname(struct shadow_copy2_private *priv,
145 struct tm *timestamp,
146 char *snap_str, size_t len)
147 {
148 ssize_t snaptime_len = -1;
149 struct shadow_copy2_snapentry *entry = NULL;
150
151 snaptime_len = strftime(snap_str, len, GMT_FORMAT, timestamp);
152 if (snaptime_len == 0) {
153 DBG_ERR("strftime failed\n");
154 return -1;
155 }
156
157 snaptime_len = -1;
158
159 for (entry = priv->snaps->snaplist; entry; entry = entry->next) {
160 if (strcmp(entry->time_fmt, snap_str) == 0) {
161 snaptime_len = snprintf(snap_str, len, "%s",
162 entry->snapname);
163 return snaptime_len;
164 }
165 }
166
167 snap_str[0] = 0;
168 return snaptime_len;
169 }
170
171
172 /**
173 * This function will check if snaplist is updated or not. If snaplist
174 * is empty then it will create a new list. Each time snaplist is updated
175 * the time is recorded. If the snapshot time is greater than the snaplist
176 * update time then chances are we are working on an older list. Then discard
177 * the old list and fetch a new snaplist.
178 *
179 * @param[in] handle VFS handle struct
180 * @param[in] snap_time time of snapshot
181 *
182 * @return true if the list is updated else false
183 */
184 static bool shadow_copy2_update_snaplist(struct vfs_handle_struct *handle,
185 time_t snap_time)
186 {
187 int ret = -1;
188 bool snaplist_updated = false;
189 struct files_struct fsp = {0};
190 struct smb_filename smb_fname = {0};
191 double seconds = 0.0;
192 struct shadow_copy2_private *priv = NULL;
193
194 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
195 return false);
196
197 seconds = difftime(snap_time, priv->snaps->fetch_time);
198
199 /*
200 * Fetch the snapshot list if either the snaplist is empty or the
201 * required snapshot time is greater than the last fetched snaplist
202 * time.
203 */
204 if (seconds > 0 || (priv->snaps->snaplist == NULL)) {
205 smb_fname.base_name = discard_const_p(char, ".");
206 fsp.fsp_name = &smb_fname;
207
208 ret = shadow_copy2_get_shadow_copy_data(handle, &fsp,
209 NULL, false);
210 if (ret == 0) {
211 snaplist_updated = true;
212 } else {
213 DBG_ERR("Failed to get shadow copy data\n");
214 }
215
216 }
217
218 return snaplist_updated;
219 }
220
221 static bool shadow_copy2_find_slashes(TALLOC_CTX *mem_ctx, const char *str,
222 size_t **poffsets,
223 unsigned *pnum_offsets)
224 {
225 unsigned num_offsets;
226 size_t *offsets;
227 const char *p;
228
229 num_offsets = 0;
230
231 p = str;
232 while ((p = strchr(p, '/')) != NULL) {
233 num_offsets += 1;
234 p += 1;
235 }
236
237 offsets = talloc_array(mem_ctx, size_t, num_offsets);
238 if (offsets == NULL) {
239 return false;
240 }
241
242 p = str;
243 num_offsets = 0;
244 while ((p = strchr(p, '/')) != NULL) {
245 offsets[num_offsets] = p-str;
246 num_offsets += 1;
247 p += 1;
248 }
249
250 *poffsets = offsets;
251 *pnum_offsets = num_offsets;
252 return true;
253 }
254
255 /**
256 * Given a timestamp, build the posix level GMT-tag string
257 * based on the configurable format.
258 */
259 static ssize_t shadow_copy2_posix_gmt_string(struct vfs_handle_struct *handle,
260 time_t snapshot,
261 char *snaptime_string,
262 size_t len)
263 {
264 struct tm snap_tm;
265 ssize_t snaptime_len;
266 struct shadow_copy2_config *config;
267 struct shadow_copy2_private *priv;
268
269 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
270 return 0);
271
272 config = priv->config;
273
274 if (config->use_sscanf) {
275 snaptime_len = snprintf(snaptime_string,
276 len,
277 config->gmt_format,
278 (unsigned long)snapshot);
279 if (snaptime_len <= 0) {
280 DEBUG(10, ("snprintf failed\n"));
281 return -1;
282 }
283 } else {
284 if (config->use_localtime) {
285 if (localtime_r(&snapshot, &snap_tm) == 0) {
286 DEBUG(10, ("gmtime_r failed\n"));
287 return -1;
288 }
289 } else {
290 if (gmtime_r(&snapshot, &snap_tm) == 0) {
291 DEBUG(10, ("gmtime_r failed\n"));
292 return -1;
293 }
294 }
295
296 if (priv->snaps->regex != NULL) {
297 snaptime_len = shadow_copy2_saved_snapname(priv,
298 &snap_tm, snaptime_string, len);
299 if (snaptime_len >= 0)
300 return snaptime_len;
301
302 /*
303 * If we fail to find the snapshot name, chances are
304 * that we have not updated our snaplist. Make sure the
305 * snaplist is updated.
306 */
307 if (!shadow_copy2_update_snaplist(handle, snapshot)) {
308 DBG_DEBUG("shadow_copy2_update_snaplist "
309 "failed\n");
310 return -1;
311 }
312
313 return shadow_copy2_saved_snapname(priv,
314 &snap_tm, snaptime_string, len);
315 }
316
317 snaptime_len = strftime(snaptime_string,
318 len,
319 config->gmt_format,
320 &snap_tm);
321 if (snaptime_len == 0) {
322 DEBUG(10, ("strftime failed\n"));
323 return -1;
324 }
325 }
326
327 return snaptime_len;
328 }
329
330 /**
331 * Given a timestamp, build the string to insert into a path
332 * as a path component for creating the local path to the
333 * snapshot at the given timestamp of the input path.
334 *
335 * In the case of a parallel snapdir (specified with an
336 * absolute path), this is the initial portion of the
337 * local path of any snapshot file. The complete path is
338 * obtained by appending the portion of the file's path
339 * below the share root's mountpoint.
340 */
341 static char *shadow_copy2_insert_string(TALLOC_CTX *mem_ctx,
342 struct vfs_handle_struct *handle,
343 time_t snapshot)
344 {
345 fstring snaptime_string;
346 ssize_t snaptime_len = 0;
347 char *result = NULL;
348 struct shadow_copy2_config *config;
349 struct shadow_copy2_private *priv;
350
351 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
352 return NULL);
353
354 config = priv->config;
355
356 snaptime_len = shadow_copy2_posix_gmt_string(handle,
357 snapshot,
358 snaptime_string,
359 sizeof(snaptime_string));
360 if (snaptime_len <= 0) {
361 return NULL;
362 }
363
364 if (config->snapdir_absolute) {
365 result = talloc_asprintf(mem_ctx, "%s/%s",
366 config->snapdir, snaptime_string);
367 } else {
368 result = talloc_asprintf(mem_ctx, "/%s/%s",
369 config->snapdir, snaptime_string);
370 }
371 if (result == NULL) {
372 DEBUG(1, (__location__ " talloc_asprintf failed\n"));
373 }
374
375 return result;
376 }
377
378 /**
379 * Build the posix snapshot path for the connection
380 * at the given timestamp, i.e. the absolute posix path
381 * that contains the snapshot for this file system.
382 *
383 * This only applies to classical case, i.e. not
384 * to the "snapdirseverywhere" mode.
385 */
386 static char *shadow_copy2_snapshot_path(TALLOC_CTX *mem_ctx,
387 struct vfs_handle_struct *handle,
388 time_t snapshot)
389 {
390 fstring snaptime_string;
391 ssize_t snaptime_len = 0;
392 char *result = NULL;
393 struct shadow_copy2_private *priv;
394
395 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
396 return NULL);
397
398 snaptime_len = shadow_copy2_posix_gmt_string(handle,
399 snapshot,
400 snaptime_string,
401 sizeof(snaptime_string));
402 if (snaptime_len <= 0) {
403 return NULL;
404 }
405
406 result = talloc_asprintf(mem_ctx, "%s/%s",
407 priv->config->snapshot_basepath, snaptime_string);
408 if (result == NULL) {
409 DEBUG(1, (__location__ " talloc_asprintf failed\n"));
410 }
411
412 return result;
413 }
414
415 static char *make_path_absolute(TALLOC_CTX *mem_ctx,
416 struct shadow_copy2_private *priv,
417 const char *name)
418 {
419 char *newpath = NULL;
420 char *abs_path = NULL;
421
422 if (name[0] != '/') {
423 newpath = talloc_asprintf(mem_ctx,
424 "%s/%s",
425 priv->shadow_cwd,
426 name);
427 if (newpath == NULL) {
428 return NULL;
429 }
430 name = newpath;
431 }
432 abs_path = canonicalize_absolute_path(mem_ctx, name);
433 TALLOC_FREE(newpath);
434 return abs_path;
435 }
436
437 /* Return a $cwd-relative path. */
438 static bool make_relative_path(const char *cwd, char *abs_path)
439 {
440 size_t cwd_len = strlen(cwd);
441 size_t abs_len = strlen(abs_path);
442
443 if (abs_len < cwd_len) {
444 return false;
445 }
446 if (memcmp(abs_path, cwd, cwd_len) != 0) {
447 return false;
448 }
449 /* The cwd_len != 1 case is for $cwd == '/' */
450 if (cwd_len != 1 &&
451 abs_path[cwd_len] != '/' &&
452 abs_path[cwd_len] != '\0')
453 {
454 return false;
455 }
456 if (abs_path[cwd_len] == '/') {
457 cwd_len++;
458 }
459 memmove(abs_path, &abs_path[cwd_len], abs_len + 1 - cwd_len);
460 return true;
461 }
462
463 static bool shadow_copy2_snapshot_to_gmt(vfs_handle_struct *handle,
464 const char *name,
465 char *gmt, size_t gmt_len);
466
467 /*
468 * Check if an incoming filename is already a snapshot converted pathname.
469 *
470 * If so, it returns the pathname truncated at the snapshot point which
471 * will be used as the connectpath.
472 */
473
474 static int check_for_converted_path(TALLOC_CTX *mem_ctx,
475 struct vfs_handle_struct *handle,
476 struct shadow_copy2_private *priv,
477 char *abs_path,
478 bool *ppath_already_converted,
479 char **pconnectpath)
480 {
481 size_t snapdirlen = 0;
482 char *p = strstr_m(abs_path, priv->config->snapdir);
483 char *q = NULL;
484 char *connect_path = NULL;
485 char snapshot[GMT_NAME_LEN+1];
486
487 *ppath_already_converted = false;
488
489 if (p == NULL) {
490 /* Must at least contain shadow:snapdir. */
491 return 0;
492 }
493
494 if (priv->config->snapdir[0] == '/' &&
495 p != abs_path) {
496 /* Absolute shadow:snapdir must be at the start. */
497 return 0;
498 }
499
500 snapdirlen = strlen(priv->config->snapdir);
501 if (p[snapdirlen] != '/') {
502 /* shadow:snapdir must end as a separate component. */
503 return 0;
504 }
505
506 if (p > abs_path && p[-1] != '/') {
507 /* shadow:snapdir must start as a separate component. */
508 return 0;
509 }
510
511 p += snapdirlen;
512 p++; /* Move past the / */
513
514 /*
515 * Need to return up to the next path
516 * component after the time.
517 * This will be used as the connectpath.
518 */
519 q = strchr(p, '/');
520 if (q == NULL) {
521 /*
522 * No next path component.
523 * Use entire string.
524 */
525 connect_path = talloc_strdup(mem_ctx,
526 abs_path);
527 } else {
528 connect_path = talloc_strndup(mem_ctx,
529 abs_path,
530 q - abs_path);
531 }
532 if (connect_path == NULL) {
533 return ENOMEM;
534 }
535
536 /*
537 * Point p at the same offset in connect_path as
538 * it is in abs_path.
539 */
540
541 p = &connect_path[p - abs_path];
542
543 /*
544 * Now ensure there is a time string at p.
545 * The SMB-format @GMT-token string is returned
546 * in snapshot.
547 */
548
549 if (!shadow_copy2_snapshot_to_gmt(handle,
550 p,
551 snapshot,
552 sizeof(snapshot))) {
553 TALLOC_FREE(connect_path);
554 return 0;
555 }
556
557 if (pconnectpath != NULL) {
558 *pconnectpath = connect_path;
559 }
560
561 *ppath_already_converted = true;
562
563 DBG_DEBUG("path |%s| is already converted. "
564 "connect path = |%s|\n",
565 abs_path,
566 connect_path);
567
568 return 0;
569 }
570
571 /**
572 * This function does two things.
573 *
574 * 1). Checks if an incoming filename is already a
575 * snapshot converted pathname.
576 * If so, it returns the pathname truncated
577 * at the snapshot point which will be used
578 * as the connectpath, and then does an early return.
579 *
580 * 2). Checks if an incoming filename contains an
581 * SMB-layer @GMT- style timestamp.
582 * If so, it strips the timestamp, and returns
583 * both the timestamp and the stripped path
584 * (making it cwd-relative).
585 */
586
587 static bool shadow_copy2_strip_snapshot_internal(TALLOC_CTX *mem_ctx,
588 struct vfs_handle_struct *handle,
589 const char *orig_name,
590 time_t *ptimestamp,
591 char **pstripped,
592 char **psnappath,
593 bool *_already_converted)
594 {
595 struct tm tm;
596 time_t timestamp = 0;
597 const char *p;
598 char *q;
599 char *stripped = NULL;
600 size_t rest_len, dst_len;
601 struct shadow_copy2_private *priv;
602 ptrdiff_t len_before_gmt;
603 const char *name = orig_name;
604 char *abs_path = NULL;
605 bool ret = true;
606 bool already_converted = false;
607 int err = 0;
608
609 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
610 return false);
611
612 DEBUG(10, (__location__ ": enter path '%s'\n", name));
613
614 if (_already_converted != NULL) {
615 *_already_converted = false;
616 }
617
618 abs_path = make_path_absolute(mem_ctx, priv, name);
619 if (abs_path == NULL) {
620 ret = false;
621 goto out;
622 }
623 name = abs_path;
624
625 DEBUG(10, (__location__ ": abs path '%s'\n", name));
626
627 err = check_for_converted_path(mem_ctx,
628 handle,
629 priv,
630 abs_path,
631 &already_converted,
632 psnappath);
633 if (err != 0) {
634 /* error in conversion. */
635 ret = false;
636 goto out;
637 }
638
639 if (already_converted) {
640 if (_already_converted != NULL) {
641 *_already_converted = true;
642 }
643 goto out;
644 }
645
646 /*
647 * From here we're only looking to strip an
648 * SMB-layer @GMT- token.
649 */
650
651 p = strstr_m(name, "@GMT-");
652 if (p == NULL) {
653 DEBUG(11, ("@GMT not found\n"));
654 goto out;
655 }
656 if ((p > name) && (p[-1] != '/')) {
657 /* the GMT-token does not start a path-component */
658 DEBUG(10, ("not at start, p=%p, name=%p, p[-1]=%d\n",
659 p, name, (int)p[-1]));
660 goto out;
661 }
662
663 len_before_gmt = p - name;
664
665 q = strptime(p, GMT_FORMAT, &tm);
666 if (q == NULL) {
667 DEBUG(10, ("strptime failed\n"));
668 goto out;
669 }
670 tm.tm_isdst = -1;
671 timestamp = timegm(&tm);
672 if (timestamp == (time_t)-1) {
673 DEBUG(10, ("timestamp==-1\n"));
674 goto out;
675 }
676 if (q[0] == '\0') {
677 /*
678 * The name consists of only the GMT token or the GMT
679 * token is at the end of the path. XP seems to send
680 * @GMT- at the end under certain circumstances even
681 * with a path prefix.
682 */
683 if (pstripped != NULL) {
684 if (len_before_gmt > 1) {
685 /*
686 * There is a path (and not only a slash)
687 * before the @GMT-. Remove the trailing
688 * slash character.
689 */
690 len_before_gmt -= 1;
691 }
692 stripped = talloc_strndup(mem_ctx, name,
693 len_before_gmt);
694 if (stripped == NULL) {
695 ret = false;
696 goto out;
697 }
698 if (orig_name[0] != '/') {
699 if (make_relative_path(priv->shadow_cwd,
700 stripped) == false) {
701 DEBUG(10, (__location__ ": path '%s' "
702 "doesn't start with cwd '%s'\n",
703 stripped, priv->shadow_cwd));
704 ret = false;
705 errno = ENOENT;
706 goto out;
707 }
708 }
709 *pstripped = stripped;
710 }
711 *ptimestamp = timestamp;
712 goto out;
713 }
714 if (q[0] != '/') {
715 /*
716 * It is not a complete path component, i.e. the path
717 * component continues after the gmt-token.
718 */
719 DEBUG(10, ("q[0] = %d\n", (int)q[0]));
720 goto out;
721 }
722 q += 1;
723
724 rest_len = strlen(q);
725 dst_len = len_before_gmt + rest_len;
726
727 if (pstripped != NULL) {
728 stripped = talloc_array(mem_ctx, char, dst_len+1);
729 if (stripped == NULL) {
730 ret = false;
731 goto out;
732 }
733 if (p > name) {
734 memcpy(stripped, name, len_before_gmt);
735 }
736 if (rest_len > 0) {
737 memcpy(stripped + len_before_gmt, q, rest_len);
738 }
739 stripped[dst_len] = '\0';
740 if (orig_name[0] != '/') {
741 if (make_relative_path(priv->shadow_cwd,
742 stripped) == false) {
743 DEBUG(10, (__location__ ": path '%s' "
744 "doesn't start with cwd '%s'\n",
745 stripped, priv->shadow_cwd));
746 ret = false;
747 errno = ENOENT;
748 goto out;
749 }
750 }
751 *pstripped = stripped;
752 }
753 *ptimestamp = timestamp;
754 ret = true;
755
756 out:
757 TALLOC_FREE(abs_path);
758 return ret;
759 }
760
761 static bool shadow_copy2_strip_snapshot(TALLOC_CTX *mem_ctx,
762 struct vfs_handle_struct *handle,
763 const char *orig_name,
764 time_t *ptimestamp,
765 char **pstripped)
766 {
767 return shadow_copy2_strip_snapshot_internal(mem_ctx,
768 handle,
769 orig_name,
770 ptimestamp,
771 pstripped,
772 NULL,
773 NULL);
774 }
775
776 static bool shadow_copy2_strip_snapshot_converted(TALLOC_CTX *mem_ctx,
777 struct vfs_handle_struct *handle,
778 const char *orig_name,
779 time_t *ptimestamp,
780 char **pstripped,
781 bool *is_converted)
782 {
783 return shadow_copy2_strip_snapshot_internal(mem_ctx,
784 handle,
785 orig_name,
786 ptimestamp,
787 pstripped,
788 NULL,
789 is_converted);
790 }
791
792 static char *shadow_copy2_find_mount_point(TALLOC_CTX *mem_ctx,
793 vfs_handle_struct *handle)
794 {
795 char *path = talloc_strdup(mem_ctx, handle->conn->connectpath);
796 dev_t dev;
797 struct stat st;
798 char *p;
799
800 if (stat(path, &st) != 0) {
801 talloc_free(path);
802 return NULL;
803 }
804
805 dev = st.st_dev;
806
807 while ((p = strrchr(path, '/')) && p > path) {
808 *p = 0;
809 if (stat(path, &st) != 0) {
810 talloc_free(path);
811 return NULL;
812 }
813 if (st.st_dev != dev) {
814 *p = '/';
815 break;
816 }
817 }
818
819 return path;
820 }
821
822 /**
823 * Convert from a name as handed in via the SMB layer
824 * and a timestamp into the local path of the snapshot
825 * of the provided file at the provided time.
826 * Also return the path in the snapshot corresponding
827 * to the file's share root.
828 */
829 static char *shadow_copy2_do_convert(TALLOC_CTX *mem_ctx,
830 struct vfs_handle_struct *handle,
831 const char *name, time_t timestamp,
832 size_t *snaproot_len)
833 {
834 struct smb_filename converted_fname;
835 char *result = NULL;
836 size_t *slashes = NULL;
837 unsigned num_slashes;
838 char *path = NULL;
839 size_t pathlen;
840 char *insert = NULL;
841 char *converted = NULL;
842 size_t insertlen, connectlen = 0;
843 int saved_errno = 0;
844 int i;
845 size_t min_offset;
846 struct shadow_copy2_config *config;
847 struct shadow_copy2_private *priv;
848 size_t in_share_offset = 0;
849
850 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
851 return NULL);
852
853 config = priv->config;
854
855 DEBUG(10, ("converting '%s'\n", name));
856
857 if (!config->snapdirseverywhere) {
858 int ret;
859 char *snapshot_path;
860
861 snapshot_path = shadow_copy2_snapshot_path(talloc_tos(),
862 handle,
863 timestamp);
864 if (snapshot_path == NULL) {
865 goto fail;
866 }
867
868 if (config->rel_connectpath == NULL) {
869 converted = talloc_asprintf(mem_ctx, "%s/%s",
870 snapshot_path, name);
871 } else {
872 converted = talloc_asprintf(mem_ctx, "%s/%s/%s",
873 snapshot_path,
874 config->rel_connectpath,
875 name);
876 }
877 if (converted == NULL) {
878 goto fail;
879 }
880
881 ZERO_STRUCT(converted_fname);
882 converted_fname.base_name = converted;
883
884 ret = SMB_VFS_NEXT_LSTAT(handle, &converted_fname);
885 DEBUG(10, ("Trying[not snapdirseverywhere] %s: %d (%s)\n",
886 converted,
887 ret, ret == 0 ? "ok" : strerror(errno)));
888 if (ret == 0) {
889 DEBUG(10, ("Found %s\n", converted));
890 result = converted;
891 converted = NULL;
892 if (snaproot_len != NULL) {
893 *snaproot_len = strlen(snapshot_path);
894 if (config->rel_connectpath != NULL) {
895 *snaproot_len +=
896 strlen(config->rel_connectpath) + 1;
897 }
898 }
899 goto fail;
900 } else {
901 errno = ENOENT;
902 goto fail;
903 }
904 /* never reached ... */
905 }
906
907 connectlen = strlen(handle->conn->connectpath);
908 if (name[0] == 0) {
909 path = talloc_strdup(mem_ctx, handle->conn->connectpath);
910 } else {
911 path = talloc_asprintf(
912 mem_ctx, "%s/%s", handle->conn->connectpath, name);
913 }
914 if (path == NULL) {
915 errno = ENOMEM;
916 goto fail;
917 }
918 pathlen = talloc_get_size(path)-1;
919
920 if (!shadow_copy2_find_slashes(talloc_tos(), path,
921 &slashes, &num_slashes)) {
922 goto fail;
923 }
924
925 insert = shadow_copy2_insert_string(talloc_tos(), handle, timestamp);
926 if (insert == NULL) {
927 goto fail;
928 }
929 insertlen = talloc_get_size(insert)-1;
930
931 /*
932 * Note: We deliberatly don't expensively initialize the
933 * array with talloc_zero here: Putting zero into
934 * converted[pathlen+insertlen] below is sufficient, because
935 * in the following for loop, the insert string is inserted
936 * at various slash places. So the memory up to position
937 * pathlen+insertlen will always be initialized when the
938 * converted string is used.
939 */
940 converted = talloc_array(mem_ctx, char, pathlen + insertlen + 1);
941 if (converted == NULL) {
942 goto fail;
943 }
944
945 if (path[pathlen-1] != '/') {
946 /*
947 * Append a fake slash to find the snapshot root
948 */
949 size_t *tmp;
950 tmp = talloc_realloc(talloc_tos(), slashes,
951 size_t, num_slashes+1);
952 if (tmp == NULL) {
953 goto fail;
954 }
955 slashes = tmp;
956 slashes[num_slashes] = pathlen;
957 num_slashes += 1;
958 }
959
960 min_offset = 0;
961
962 if (!config->crossmountpoints) {
963 min_offset = strlen(config->mount_point);
964 }
965
966 memcpy(converted, path, pathlen+1);
967 converted[pathlen+insertlen] = '\0';
968
969 ZERO_STRUCT(converted_fname);
970 converted_fname.base_name = converted;
971
972 for (i = num_slashes-1; i>=0; i--) {
973 int ret;
974 size_t offset;
975
976 offset = slashes[i];
977
978 if (offset < min_offset) {
979 errno = ENOENT;
980 goto fail;
981 }
982
983 if (offset >= connectlen) {
984 in_share_offset = offset;
985 }
986
987 memcpy(converted+offset, insert, insertlen);
988
989 offset += insertlen;
990 memcpy(converted+offset, path + slashes[i],
991 pathlen - slashes[i]);
992
993 ret = SMB_VFS_NEXT_LSTAT(handle, &converted_fname);
994
995 DEBUG(10, ("Trying[snapdirseverywhere] %s: %d (%s)\n",
996 converted,
997 ret, ret == 0 ? "ok" : strerror(errno)));
998 if (ret == 0) {
999 /* success */
1000 if (snaproot_len != NULL) {
1001 *snaproot_len = in_share_offset + insertlen;
1002 }
1003 break;
1004 }
1005 if (errno == ENOTDIR) {
1006 /*
1007 * This is a valid condition: We appended the
1008 * .snaphots/@GMT.. to a file name. Just try
1009 * with the upper levels.
1010 */
1011 continue;
1012 }
1013 if (errno != ENOENT) {
1014 /* Other problem than "not found" */
1015 goto fail;
1016 }
1017 }
1018
1019 if (i >= 0) {
1020 /*
1021 * Found something
1022 */
1023 DEBUG(10, ("Found %s\n", converted));
1024 result = converted;
1025 converted = NULL;
1026 } else {
1027 errno = ENOENT;
1028 }
1029 fail:
1030 if (result == NULL) {
1031 saved_errno = errno;
1032 }
1033 TALLOC_FREE(converted);
1034 TALLOC_FREE(insert);
1035 TALLOC_FREE(slashes);
1036 TALLOC_FREE(path);
1037 if (saved_errno != 0) {
1038 errno = saved_errno;
1039 }
1040 return result;
1041 }
1042
1043 /**
1044 * Convert from a name as handed in via the SMB layer
1045 * and a timestamp into the local path of the snapshot
1046 * of the provided file at the provided time.
1047 */
1048 static char *shadow_copy2_convert(TALLOC_CTX *mem_ctx,
1049 struct vfs_handle_struct *handle,
1050 const char *name, time_t timestamp)
1051 {
1052 return shadow_copy2_do_convert(mem_ctx, handle, name, timestamp, NULL);
1053 }
1054
1055 /*
1056 modify a sbuf return to ensure that inodes in the shadow directory
1057 are different from those in the main directory
1058 */
1059 static void convert_sbuf(vfs_handle_struct *handle, const char *fname,
1060 SMB_STRUCT_STAT *sbuf)
1061 {
1062 struct shadow_copy2_private *priv;
1063
1064 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1065 return);
1066
1067 if (priv->config->fixinodes) {
1068 /* some snapshot systems, like GPFS, return the name
1069 device:inode for the snapshot files as the current
1070 files. That breaks the 'restore' button in the shadow copy
1071 GUI, as the client gets a sharing violation.
1072
1073 This is a crude way of allowing both files to be
1074 open at once. It has a slight chance of inode
1075 number collision, but I can't see a better approach
1076 without significant VFS changes
1077 */
1078 TDB_DATA key = { .dptr = discard_const_p(uint8_t, fname),
1079 .dsize = strlen(fname) };
1080 uint32_t shash;
1081
1082 shash = tdb_jenkins_hash(&key) & 0xFF000000;
1083 if (shash == 0) {
1084 shash = 1;
1085 }
1086 sbuf->st_ex_ino ^= shash;
1087 }
1088 }
1089
1090 static DIR *shadow_copy2_opendir(vfs_handle_struct *handle,
1091 const struct smb_filename *smb_fname,
1092 const char *mask,
1093 uint32_t attr)
1094 {
1095 time_t timestamp = 0;
1096 char *stripped = NULL;
1097 DIR *ret;
1098 int saved_errno = 0;
1099 char *conv;
1100 struct smb_filename *conv_smb_fname = NULL;
1101
1102 if (!shadow_copy2_strip_snapshot(talloc_tos(),
1103 handle,
1104 smb_fname->base_name,
1105 &timestamp,
1106 &stripped)) {
1107 return NULL;
1108 }
1109 if (timestamp == 0) {
1110 return SMB_VFS_NEXT_OPENDIR(handle, smb_fname, mask, attr);
1111 }
1112 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1113 TALLOC_FREE(stripped);
1114 if (conv == NULL) {
1115 return NULL;
1116 }
1117 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
1118 conv,
1119 NULL,
1120 NULL,
1121 smb_fname->flags);
1122 if (conv_smb_fname == NULL) {
1123 TALLOC_FREE(conv);
1124 return NULL;
1125 }
1126 ret = SMB_VFS_NEXT_OPENDIR(handle, conv_smb_fname, mask, attr);
1127 if (ret == NULL) {
1128 saved_errno = errno;
1129 }
1130 TALLOC_FREE(conv);
1131 TALLOC_FREE(conv_smb_fname);
1132 if (saved_errno != 0) {
1133 errno = saved_errno;
1134 }
1135 return ret;
1136 }
1137
1138 static int shadow_copy2_rename(vfs_handle_struct *handle,
1139 const struct smb_filename *smb_fname_src,
1140 const struct smb_filename *smb_fname_dst)
1141 {
1142 time_t timestamp_src = 0;
1143 time_t timestamp_dst = 0;
1144 char *snappath_src = NULL;
1145 char *snappath_dst = NULL;
1146
1147 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(), handle,
1148 smb_fname_src->base_name,
1149 &timestamp_src, NULL, &snappath_src,
1150 NULL)) {
1151 return -1;
1152 }
1153 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(), handle,
1154 smb_fname_dst->base_name,
1155 &timestamp_dst, NULL, &snappath_dst,
1156 NULL)) {
1157 return -1;
1158 }
1159 if (timestamp_src != 0) {
1160 errno = EXDEV;
1161 return -1;
1162 }
1163 if (timestamp_dst != 0) {
1164 errno = EROFS;
1165 return -1;
1166 }
1167 /*
1168 * Don't allow rename on already converted paths.
1169 */
1170 if (snappath_src != NULL) {
1171 errno = EXDEV;
1172 return -1;
1173 }
1174 if (snappath_dst != NULL) {
1175 errno = EROFS;
1176 return -1;
1177 }
1178 return SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
1179 }
1180
1181 static int shadow_copy2_symlink(vfs_handle_struct *handle,
1182 const char *link_contents,
1183 const struct smb_filename *new_smb_fname)
1184 {
1185 time_t timestamp_old = 0;
1186 time_t timestamp_new = 0;
1187 char *snappath_old = NULL;
1188 char *snappath_new = NULL;
1189
1190 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1191 handle,
1192 link_contents,
1193 &timestamp_old,
1194 NULL,
1195 &snappath_old,
1196 NULL)) {
1197 return -1;
1198 }
1199 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1200 handle,
1201 new_smb_fname->base_name,
1202 &timestamp_new,
1203 NULL,
1204 &snappath_new,
1205 NULL)) {
1206 return -1;
1207 }
1208 if ((timestamp_old != 0) || (timestamp_new != 0)) {
1209 errno = EROFS;
1210 return -1;
1211 }
1212 /*
1213 * Don't allow symlinks on already converted paths.
1214 */
1215 if ((snappath_old != NULL) || (snappath_new != NULL)) {
1216 errno = EROFS;
1217 return -1;
1218 }
1219 return SMB_VFS_NEXT_SYMLINK(handle, link_contents, new_smb_fname);
1220 }
1221
1222 static int shadow_copy2_link(vfs_handle_struct *handle,
1223 const struct smb_filename *old_smb_fname,
1224 const struct smb_filename *new_smb_fname)
1225 {
1226 time_t timestamp_old = 0;
1227 time_t timestamp_new = 0;
1228 char *snappath_old = NULL;
1229 char *snappath_new = NULL;
1230
1231 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1232 handle,
1233 old_smb_fname->base_name,
1234 &timestamp_old,
1235 NULL,
1236 &snappath_old,
1237 NULL)) {
1238 return -1;
1239 }
1240 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1241 handle,
1242 new_smb_fname->base_name,
1243 &timestamp_new,
1244 NULL,
1245 &snappath_new,
1246 NULL)) {
1247 return -1;
1248 }
1249 if ((timestamp_old != 0) || (timestamp_new != 0)) {
1250 errno = EROFS;
1251 return -1;
1252 }
1253 /*
1254 * Don't allow links on already converted paths.
1255 */
1256 if ((snappath_old != NULL) || (snappath_new != NULL)) {
1257 errno = EROFS;
1258 return -1;
1259 }
1260 return SMB_VFS_NEXT_LINK(handle, old_smb_fname, new_smb_fname);
1261 }
1262
1263 static int shadow_copy2_stat(vfs_handle_struct *handle,
1264 struct smb_filename *smb_fname)
1265 {
1266 time_t timestamp = 0;
1267 char *stripped = NULL;
1268 char *tmp;
1269 int saved_errno = 0;
1270 int ret;
1271
1272 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1273 smb_fname->base_name,
1274 &timestamp, &stripped)) {
1275 return -1;
1276 }
1277 if (timestamp == 0) {
1278 return SMB_VFS_NEXT_STAT(handle, smb_fname);
1279 }
1280
1281 tmp = smb_fname->base_name;
1282 smb_fname->base_name = shadow_copy2_convert(
1283 talloc_tos(), handle, stripped, timestamp);
1284 TALLOC_FREE(stripped);
1285
1286 if (smb_fname->base_name == NULL) {
1287 smb_fname->base_name = tmp;
1288 return -1;
1289 }
1290
1291 ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
1292 if (ret == -1) {
1293 saved_errno = errno;
1294 }
1295
1296 TALLOC_FREE(smb_fname->base_name);
1297 smb_fname->base_name = tmp;
1298
1299 if (ret == 0) {
1300 convert_sbuf(handle, smb_fname->base_name, &smb_fname->st);
1301 }
1302 if (saved_errno != 0) {
1303 errno = saved_errno;
1304 }
1305 return ret;
1306 }
1307
1308 static int shadow_copy2_lstat(vfs_handle_struct *handle,
1309 struct smb_filename *smb_fname)
1310 {
1311 time_t timestamp = 0;
1312 char *stripped = NULL;
1313 char *tmp;
1314 int saved_errno = 0;
1315 int ret;
1316
1317 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1318 smb_fname->base_name,
1319 &timestamp, &stripped)) {
1320 return -1;
1321 }
1322 if (timestamp == 0) {
1323 return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
1324 }
1325
1326 tmp = smb_fname->base_name;
1327 smb_fname->base_name = shadow_copy2_convert(
1328 talloc_tos(), handle, stripped, timestamp);
1329 TALLOC_FREE(stripped);
1330
1331 if (smb_fname->base_name == NULL) {
1332 smb_fname->base_name = tmp;
1333 return -1;
1334 }
1335
1336 ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
1337 if (ret == -1) {
1338 saved_errno = errno;
1339 }
1340
1341 TALLOC_FREE(smb_fname->base_name);
1342 smb_fname->base_name = tmp;
1343
1344 if (ret == 0) {
1345 convert_sbuf(handle, smb_fname->base_name, &smb_fname->st);
1346 }
1347 if (saved_errno != 0) {
1348 errno = saved_errno;
1349 }
1350 return ret;
1351 }
1352
1353 static int shadow_copy2_fstat(vfs_handle_struct *handle, files_struct *fsp,
1354 SMB_STRUCT_STAT *sbuf)
1355 {
1356 time_t timestamp = 0;
1357 struct smb_filename *orig_smb_fname = NULL;
1358 struct smb_filename vss_smb_fname;
1359 struct smb_filename *orig_base_smb_fname = NULL;
1360 struct smb_filename vss_base_smb_fname;
1361 char *stripped = NULL;
1362 int saved_errno = 0;
1363 bool ok;
1364 int ret;
1365
1366 ok = shadow_copy2_strip_snapshot(talloc_tos(), handle,
1367 fsp->fsp_name->base_name,
1368 &timestamp, &stripped);
1369 if (!ok) {
1370 return -1;
1371 }
1372
1373 if (timestamp == 0) {
1374 TALLOC_FREE(stripped);
1375 return SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
1376 }
1377
1378 vss_smb_fname = *fsp->fsp_name;
1379 vss_smb_fname.base_name = shadow_copy2_convert(talloc_tos(),
1380 handle,
1381 stripped,
1382 timestamp);
1383 TALLOC_FREE(stripped);
1384 if (vss_smb_fname.base_name == NULL) {
1385 return -1;
1386 }
1387
1388 orig_smb_fname = fsp->fsp_name;
1389 fsp->fsp_name = &vss_smb_fname;
1390
1391 if (fsp->base_fsp != NULL) {
1392 vss_base_smb_fname = *fsp->base_fsp->fsp_name;
1393 vss_base_smb_fname.base_name = vss_smb_fname.base_name;
1394 orig_base_smb_fname = fsp->base_fsp->fsp_name;
1395 fsp->base_fsp->fsp_name = &vss_base_smb_fname;
1396 }
1397
1398 ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
1399 fsp->fsp_name = orig_smb_fname;
1400 if (fsp->base_fsp != NULL) {
1401 fsp->base_fsp->fsp_name = orig_base_smb_fname;
1402 }
1403 if (ret == -1) {
1404 saved_errno = errno;
1405 }
1406
1407 if (ret == 0) {
1408 convert_sbuf(handle, fsp->fsp_name->base_name, sbuf);
1409 }
1410 if (saved_errno != 0) {
1411 errno = saved_errno;
1412 }
1413 return ret;
1414 }
1415
1416 static int shadow_copy2_open(vfs_handle_struct *handle,
1417 struct smb_filename *smb_fname, files_struct *fsp,
1418 int flags, mode_t mode)
1419 {
1420 time_t timestamp = 0;
1421 char *stripped = NULL;
1422 char *tmp;
1423 bool is_converted = false;
1424 int saved_errno = 0;
1425 int ret;
1426
1427 if (!shadow_copy2_strip_snapshot_converted(talloc_tos(), handle,
1428 smb_fname->base_name,
1429 &timestamp, &stripped,
1430 &is_converted)) {
1431 return -1;
1432 }
1433 if (timestamp == 0) {
1434 if (is_converted) {
1435 /*
1436 * Just pave over the user requested mode and use
1437 * O_RDONLY. Later attempts by the client to write on
1438 * the handle will fail in the pwrite() syscall with
1439 * EINVAL which we carefully map to EROFS. In sum, this
1440 * matches Windows behaviour.
1441 */
1442 flags = O_RDONLY;
1443 }
1444 return SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
1445 }
1446
1447 tmp = smb_fname->base_name;
1448 smb_fname->base_name = shadow_copy2_convert(
1449 talloc_tos(), handle, stripped, timestamp);
1450 TALLOC_FREE(stripped);
1451
1452 if (smb_fname->base_name == NULL) {
1453 smb_fname->base_name = tmp;
1454 return -1;
1455 }
1456
1457 /*
1458 * Just pave over the user requested mode and use O_RDONLY. Later
1459 * attempts by the client to write on the handle will fail in the
1460 * pwrite() syscall with EINVAL which we carefully map to EROFS. In sum,
1461 * this matches Windows behaviour.
1462 */
1463 flags = O_RDONLY;
1464
1465 ret = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
1466 if (ret == -1) {
1467 saved_errno = errno;
1468 }
1469
1470 TALLOC_FREE(smb_fname->base_name);
1471 smb_fname->base_name = tmp;
1472
1473 if (saved_errno != 0) {
1474 errno = saved_errno;
1475 }
1476 return ret;
1477 }
1478
1479 static int shadow_copy2_unlink(vfs_handle_struct *handle,
1480 const struct smb_filename *smb_fname)
1481 {
1482 time_t timestamp = 0;
1483 char *stripped = NULL;
1484 int saved_errno = 0;
1485 int ret;
1486 struct smb_filename *conv;
1487
1488 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1489 smb_fname->base_name,
1490 &timestamp, &stripped)) {
1491 return -1;
1492 }
1493 if (timestamp == 0) {
1494 return SMB_VFS_NEXT_UNLINK(handle, smb_fname);
1495 }
1496 conv = cp_smb_filename(talloc_tos(), smb_fname);
1497 if (conv == NULL) {
1498 errno = ENOMEM;
1499 return -1;
1500 }
1501 conv->base_name = shadow_copy2_convert(
1502 conv, handle, stripped, timestamp);
1503 TALLOC_FREE(stripped);
1504 if (conv->base_name == NULL) {
1505 return -1;
1506 }
1507 ret = SMB_VFS_NEXT_UNLINK(handle, conv);
1508 if (ret == -1) {
1509 saved_errno = errno;
1510 }
1511 TALLOC_FREE(conv);
1512 if (saved_errno != 0) {
1513 errno = saved_errno;
1514 }
1515 return ret;
1516 }
1517
1518 static int shadow_copy2_chmod(vfs_handle_struct *handle,
1519 const struct smb_filename *smb_fname,
1520 mode_t mode)
1521 {
1522 time_t timestamp = 0;
1523 char *stripped = NULL;
1524 int saved_errno = 0;
1525 int ret;
1526 char *conv = NULL;
1527 struct smb_filename *conv_smb_fname;
1528
1529 if (!shadow_copy2_strip_snapshot(talloc_tos(),
1530 handle,
1531 smb_fname->base_name,
1532 &timestamp,
1533 &stripped)) {
1534 return -1;
1535 }
1536 if (timestamp == 0) {
1537 TALLOC_FREE(stripped);
1538 return SMB_VFS_NEXT_CHMOD(handle, smb_fname, mode);
1539 }
1540 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1541 TALLOC_FREE(stripped);
1542 if (conv == NULL) {
1543 return -1;
1544 }
1545 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
1546 conv,
1547 NULL,
1548 NULL,
1549 smb_fname->flags);
1550 if (conv_smb_fname == NULL) {
1551 TALLOC_FREE(conv);
1552 errno = ENOMEM;
1553 return -1;
1554 }
1555
1556 ret = SMB_VFS_NEXT_CHMOD(handle, conv_smb_fname, mode);
1557 if (ret == -1) {
1558 saved_errno = errno;
1559 }
1560 TALLOC_FREE(conv);
1561 TALLOC_FREE(conv_smb_fname);
1562 if (saved_errno != 0) {
1563 errno = saved_errno;
1564 }
1565 return ret;
1566 }
1567
1568 static int shadow_copy2_chown(vfs_handle_struct *handle,
1569 const struct smb_filename *smb_fname,
1570 uid_t uid,
1571 gid_t gid)
1572 {
1573 time_t timestamp = 0;
1574 char *stripped = NULL;
1575 int saved_errno = 0;
1576 int ret;
1577 char *conv = NULL;
1578 struct smb_filename *conv_smb_fname = NULL;
1579
1580 if (!shadow_copy2_strip_snapshot(talloc_tos(),
1581 handle,
1582 smb_fname->base_name,
1583 &timestamp,
1584 &stripped)) {
1585 return -1;
1586 }
1587 if (timestamp == 0) {
1588 return SMB_VFS_NEXT_CHOWN(handle, smb_fname, uid, gid);
1589 }
1590 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1591 TALLOC_FREE(stripped);
1592 if (conv == NULL) {
1593 return -1;
1594 }
1595 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
1596 conv,
1597 NULL,
1598 NULL,
1599 smb_fname->flags);
1600 if (conv_smb_fname == NULL) {
1601 TALLOC_FREE(conv);
1602 errno = ENOMEM;
1603 return -1;
1604 }
1605 ret = SMB_VFS_NEXT_CHOWN(handle, conv_smb_fname, uid, gid);
1606 if (ret == -1) {
1607 saved_errno = errno;
1608 }
1609 TALLOC_FREE(conv);
1610 TALLOC_FREE(conv_smb_fname);
1611 if (saved_errno != 0) {
1612 errno = saved_errno;
1613 }
1614 return ret;
1615 }
1616
1617 static void store_cwd_data(vfs_handle_struct *handle,
1618 const char *connectpath)
1619 {
1620 struct shadow_copy2_private *priv = NULL;
1621 struct smb_filename *cwd_fname = NULL;
1622
1623 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1624 return);
1625
1626 TALLOC_FREE(priv->shadow_cwd);
1627 cwd_fname = SMB_VFS_NEXT_GETWD(handle, talloc_tos());
1628 if (cwd_fname == NULL) {
1629 smb_panic("getwd failed\n");
1630 }
1631 DBG_DEBUG("shadow cwd = %s\n", cwd_fname->base_name);
1632 priv->shadow_cwd = talloc_strdup(priv, cwd_fname->base_name);
1633 TALLOC_FREE(cwd_fname);
1634 if (priv->shadow_cwd == NULL) {
1635 smb_panic("talloc failed\n");
1636 }
1637 TALLOC_FREE(priv->shadow_connectpath);
1638 if (connectpath) {
1639 DBG_DEBUG("shadow conectpath = %s\n", connectpath);
1640 priv->shadow_connectpath = talloc_strdup(priv, connectpath);
1641 if (priv->shadow_connectpath == NULL) {
1642 smb_panic("talloc failed\n");
1643 }
1644 }
1645 }
1646
1647 static int shadow_copy2_chdir(vfs_handle_struct *handle,
1648 const struct smb_filename *smb_fname)
1649 {
1650 time_t timestamp = 0;
1651 char *stripped = NULL;
1652 char *snappath = NULL;
1653 int ret = -1;
1654 int saved_errno = 0;
1655 char *conv = NULL;
1656 size_t rootpath_len = 0;
1657 struct smb_filename *conv_smb_fname = NULL;
1658
1659 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1660 handle,
1661 smb_fname->base_name,
1662 &timestamp,
1663 &stripped,
1664 &snappath,
1665 NULL)) {
1666 return -1;
1667 }
1668 if (stripped != NULL) {
1669 conv = shadow_copy2_do_convert(talloc_tos(),
1670 handle,
1671 stripped,
1672 timestamp,
1673 &rootpath_len);
1674 TALLOC_FREE(stripped);
1675 if (conv == NULL) {
1676 return -1;
1677 }
1678 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
1679 conv,
1680 NULL,
1681 NULL,
1682 smb_fname->flags);
1683 } else {
1684 conv_smb_fname = cp_smb_filename(talloc_tos(), smb_fname);
1685 }
1686
1687 if (conv_smb_fname == NULL) {
1688 TALLOC_FREE(conv);
1689 errno = ENOMEM;
1690 return -1;
1691 }
1692
1693 ret = SMB_VFS_NEXT_CHDIR(handle, conv_smb_fname);
1694 if (ret == -1) {
1695 saved_errno = errno;
1696 }
1697
1698 if (ret == 0) {
1699 if (conv != NULL && rootpath_len != 0) {
1700 conv[rootpath_len] = '\0';
1701 } else if (snappath != 0) {
1702 TALLOC_FREE(conv);
1703 conv = snappath;
1704 }
1705 store_cwd_data(handle, conv);
1706 }
1707
1708 TALLOC_FREE(stripped);
1709 TALLOC_FREE(conv);
1710 TALLOC_FREE(conv_smb_fname);
1711
1712 if (saved_errno != 0) {
1713 errno = saved_errno;
1714 }
1715 return ret;
1716 }
1717
1718 static int shadow_copy2_ntimes(vfs_handle_struct *handle,
1719 const struct smb_filename *smb_fname,
1720 struct smb_file_time *ft)
1721 {
1722 time_t timestamp = 0;
1723 char *stripped = NULL;
1724 int saved_errno = 0;
1725 int ret;
1726 struct smb_filename *conv;
1727
1728 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1729 smb_fname->base_name,
1730 &timestamp, &stripped)) {
1731 return -1;
1732 }
1733 if (timestamp == 0) {
1734 return SMB_VFS_NEXT_NTIMES(handle, smb_fname, ft);
1735 }
1736 conv = cp_smb_filename(talloc_tos(), smb_fname);
1737 if (conv == NULL) {
1738 errno = ENOMEM;
1739 return -1;
1740 }
1741 conv->base_name = shadow_copy2_convert(
1742 conv, handle, stripped, timestamp);
1743 TALLOC_FREE(stripped);
1744 if (conv->base_name == NULL) {
1745 return -1;
1746 }
1747 ret = SMB_VFS_NEXT_NTIMES(handle, conv, ft);
1748 if (ret == -1) {
1749 saved_errno = errno;
1750 }
1751 TALLOC_FREE(conv);
1752 if (saved_errno != 0) {
1753 errno = saved_errno;
1754 }
1755 return ret;
1756 }
1757
1758 static int shadow_copy2_readlink(vfs_handle_struct *handle,
1759 const struct smb_filename *smb_fname,
1760 char *buf,
1761 size_t bufsiz)
1762 {
1763 time_t timestamp = 0;
1764 char *stripped = NULL;
1765 int saved_errno = 0;
1766 int ret;
1767 struct smb_filename *conv = NULL;
1768
1769 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1770 smb_fname->base_name,
1771 &timestamp, &stripped)) {
1772 return -1;
1773 }
1774 if (timestamp == 0) {
1775 return SMB_VFS_NEXT_READLINK(handle, smb_fname, buf, bufsiz);
1776 }
1777 conv = cp_smb_filename(talloc_tos(), smb_fname);
1778 if (conv == NULL) {
1779 TALLOC_FREE(stripped);
1780 errno = ENOMEM;
1781 return -1;
1782 }
1783 conv->base_name = shadow_copy2_convert(
1784 conv, handle, stripped, timestamp);
1785 TALLOC_FREE(stripped);
1786 if (conv->base_name == NULL) {
1787 return -1;
1788 }
1789 ret = SMB_VFS_NEXT_READLINK(handle, conv, buf, bufsiz);
1790 if (ret == -1) {
1791 saved_errno = errno;
1792 }
1793 TALLOC_FREE(conv);
1794 if (saved_errno != 0) {
1795 errno = saved_errno;
1796 }
1797 return ret;
1798 }
1799
1800 static int shadow_copy2_mknod(vfs_handle_struct *handle,
1801 const struct smb_filename *smb_fname,
1802 mode_t mode,
1803 SMB_DEV_T dev)
1804 {
1805 time_t timestamp = 0;
1806 char *stripped = NULL;
1807 int saved_errno = 0;
1808 int ret;
1809 struct smb_filename *conv = NULL;
1810
1811 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1812 smb_fname->base_name,
1813 &timestamp, &stripped)) {
1814 return -1;
1815 }
1816 if (timestamp == 0) {
1817 return SMB_VFS_NEXT_MKNOD(handle, smb_fname, mode, dev);
1818 }
1819 conv = cp_smb_filename(talloc_tos(), smb_fname);
1820 if (conv == NULL) {
1821 errno = ENOMEM;
1822 return -1;
1823 }
1824 conv->base_name = shadow_copy2_convert(
1825 conv, handle, stripped, timestamp);
1826 TALLOC_FREE(stripped);
1827 if (conv->base_name == NULL) {
1828 return -1;
1829 }
1830 ret = SMB_VFS_NEXT_MKNOD(handle, conv, mode, dev);
1831 if (ret == -1) {
1832 saved_errno = errno;
1833 }
1834 TALLOC_FREE(conv);
1835 if (saved_errno != 0) {
1836 errno = saved_errno;
1837 }
1838 return ret;
1839 }
1840
1841 static struct smb_filename *shadow_copy2_realpath(vfs_handle_struct *handle,
1842 TALLOC_CTX *ctx,
1843 const struct smb_filename *smb_fname)
1844 {
1845 time_t timestamp = 0;
1846 char *stripped = NULL;
1847 struct smb_filename *result_fname = NULL;
1848 struct smb_filename *conv_fname = NULL;
1849 int saved_errno = 0;
1850
1851 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1852 smb_fname->base_name,
1853 &timestamp, &stripped)) {
1854 goto done;
1855 }
1856 if (timestamp == 0) {
1857 return SMB_VFS_NEXT_REALPATH(handle, ctx, smb_fname);
1858 }
1859
1860 conv_fname = cp_smb_filename(talloc_tos(), smb_fname);
1861 if (conv_fname == NULL) {
1862 goto done;
1863 }
1864 conv_fname->base_name = shadow_copy2_convert(
1865 conv_fname, handle, stripped, timestamp);
1866 if (conv_fname->base_name == NULL) {
1867 goto done;
1868 }
1869
1870 result_fname = SMB_VFS_NEXT_REALPATH(handle, ctx, conv_fname);
1871
1872 done:
1873 if (result_fname == NULL) {
1874 saved_errno = errno;
1875 }
1876 TALLOC_FREE(conv_fname);
1877 TALLOC_FREE(stripped);
1878 if (saved_errno != 0) {
1879 errno = saved_errno;
1880 }
1881 return result_fname;
1882 }
1883
1884 /**
1885 * Check whether a given directory contains a
1886 * snapshot directory as direct subdirectory.
1887 * If yes, return the path of the snapshot-subdir,
1888 * otherwise return NULL.
1889 */
1890 static char *have_snapdir(struct vfs_handle_struct *handle,
1891 const char *path)
1892 {
1893 struct smb_filename smb_fname;
1894 int ret;
1895 struct shadow_copy2_private *priv;
1896
1897 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1898 return NULL);
1899
1900 ZERO_STRUCT(smb_fname);
1901 smb_fname.base_name = talloc_asprintf(talloc_tos(), "%s/%s",
1902 path, priv->config->snapdir);
1903 if (smb_fname.base_name == NULL) {
1904 return NULL;
1905 }
1906
1907 ret = SMB_VFS_NEXT_STAT(handle, &smb_fname);
1908 if ((ret == 0) && (S_ISDIR(smb_fname.st.st_ex_mode))) {
1909 return smb_fname.base_name;
1910 }
1911 TALLOC_FREE(smb_fname.base_name);
1912 return NULL;
1913 }
1914
1915 static bool check_access_snapdir(struct vfs_handle_struct *handle,
1916 const char *path)
1917 {
1918 struct smb_filename smb_fname;
1919 int ret;
1920 NTSTATUS status;
1921
1922 ZERO_STRUCT(smb_fname);
1923 smb_fname.base_name = talloc_asprintf(talloc_tos(),
1924 "%s",
1925 path);
1926 if (smb_fname.base_name == NULL) {
1927 return false;
1928 }
1929
1930 ret = SMB_VFS_NEXT_STAT(handle, &smb_fname);
1931 if (ret != 0 || !S_ISDIR(smb_fname.st.st_ex_mode)) {
1932 TALLOC_FREE(smb_fname.base_name);
1933 return false;
1934 }
1935
1936 status = smbd_check_access_rights(handle->conn,
1937 &smb_fname,
1938 false,
1939 SEC_DIR_LIST);
1940 if (!NT_STATUS_IS_OK(status)) {
1941 DEBUG(0,("user does not have list permission "
1942 "on snapdir %s\n",
1943 smb_fname.base_name));
1944 TALLOC_FREE(smb_fname.base_name);
1945 return false;
1946 }
1947 TALLOC_FREE(smb_fname.base_name);
1948 return true;
1949 }
1950
1951 /**
1952 * Find the snapshot directory (if any) for the given
1953 * filename (which is relative to the share).
1954 */
1955 static const char *shadow_copy2_find_snapdir(TALLOC_CTX *mem_ctx,
1956 struct vfs_handle_struct *handle,
1957 struct smb_filename *smb_fname)
1958 {
1959 char *path, *p;
1960 const char *snapdir;
1961 struct shadow_copy2_config *config;
1962 struct shadow_copy2_private *priv;
1963
1964 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1965 return NULL);
1966
1967 config = priv->config;
1968
1969 /*
1970 * If the non-snapdisrseverywhere mode, we should not search!
1971 */
1972 if (!config->snapdirseverywhere) {
1973 return config->snapshot_basepath;
1974 }
1975
1976 path = talloc_asprintf(mem_ctx, "%s/%s",
1977 handle->conn->connectpath,
1978 smb_fname->base_name);
1979 if (path == NULL) {
1980 return NULL;
1981 }
1982
1983 snapdir = have_snapdir(handle, path);
1984 if (snapdir != NULL) {
1985 TALLOC_FREE(path);
1986 return snapdir;
1987 }
1988
1989 while ((p = strrchr(path, '/')) && (p > path)) {
1990
1991 p[0] = '\0';
1992
1993 snapdir = have_snapdir(handle, path);
1994 if (snapdir != NULL) {
1995 TALLOC_FREE(path);
1996 return snapdir;
1997 }
1998 }
1999 TALLOC_FREE(path);
2000 return NULL;
2001 }
2002
2003 static bool shadow_copy2_snapshot_to_gmt(vfs_handle_struct *handle,
2004 const char *name,
2005 char *gmt, size_t gmt_len)
2006 {
2007 struct tm timestamp;
2008 time_t timestamp_t;
2009 unsigned long int timestamp_long;
2010 const char *fmt;
2011 struct shadow_copy2_config *config;
2012 struct shadow_copy2_private *priv;
2013 char *tmpstr = NULL;
2014 char *tmp = NULL;
2015 bool converted = false;
2016 int ret = -1;
2017
2018 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2019 return NULL);
2020
2021 config = priv->config;
2022
2023 fmt = config->gmt_format;
2024
2025 /*
2026 * If regex is provided, then we will have to parse the
2027 * filename which will contain both the prefix and the time format.
2028 * e.g. <prefix><delimiter><time_format>
2029 */
2030 if (priv->snaps->regex != NULL) {
2031 tmpstr = talloc_strdup(talloc_tos(), name);
2032 /* point "name" to the time format */
2033 name = strstr(name, priv->config->delimiter);
2034 if (name == NULL) {
2035 goto done;
2036 }
2037 /* Extract the prefix */
2038 tmp = strstr(tmpstr, priv->config->delimiter);
2039 if (tmp == NULL) {
2040 goto done;
2041 }
2042 *tmp = '\0';
2043
2044 /* Parse regex */
2045 ret = regexec(priv->snaps->regex, tmpstr, 0, NULL, 0);
2046 if (ret) {
2047 DBG_DEBUG("shadow_copy2_snapshot_to_gmt: "
2048 "no regex match for %s\n", tmpstr);
2049 goto done;
2050 }
2051 }
2052
2053 ZERO_STRUCT(timestamp);
2054 if (config->use_sscanf) {
2055 if (sscanf(name, fmt, &timestamp_long) != 1) {
2056 DEBUG(10, ("shadow_copy2_snapshot_to_gmt: "
2057 "no sscanf match %s: %s\n",
2058 fmt, name));
2059 goto done;
2060 }
2061 timestamp_t = timestamp_long;
2062 gmtime_r(&timestamp_t, &timestamp);
2063 } else {
2064 if (strptime(name, fmt, &timestamp) == NULL) {
2065 DEBUG(10, ("shadow_copy2_snapshot_to_gmt: "
2066 "no match %s: %s\n",
2067 fmt, name));
2068 goto done;
2069 }
2070 DEBUG(10, ("shadow_copy2_snapshot_to_gmt: match %s: %s\n",
2071 fmt, name));
2072
2073 if (config->use_localtime) {
2074 timestamp.tm_isdst = -1;
2075 timestamp_t = mktime(&timestamp);
2076 gmtime_r(&timestamp_t, &timestamp);
2077 }
2078 }
2079
2080 strftime(gmt, gmt_len, GMT_FORMAT, &timestamp);
2081 converted = true;
2082
2083 done:
2084 TALLOC_FREE(tmpstr);
2085 return converted;
2086 }
2087
2088 static int shadow_copy2_label_cmp_asc(const void *x, const void *y)
2089 {
2090 return strncmp((const char *)x, (const char *)y, sizeof(SHADOW_COPY_LABEL));
2091 }
2092
2093 static int shadow_copy2_label_cmp_desc(const void *x, const void *y)
2094 {
2095 return -strncmp((const char *)x, (const char *)y, sizeof(SHADOW_COPY_LABEL));
2096 }
2097
2098 /*
2099 sort the shadow copy data in ascending or descending order
2100 */
2101 static void shadow_copy2_sort_data(vfs_handle_struct *handle,
2102 struct shadow_copy_data *shadow_copy2_data)
2103 {
2104 int (*cmpfunc)(const void *, const void *);
2105 const char *sort;
2106 struct shadow_copy2_private *priv;
2107
2108 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2109 return);
2110
2111 sort = priv->config->sort_order;
2112 if (sort == NULL) {
2113 return;
2114 }
2115
2116 if (strcmp(sort, "asc") == 0) {
2117 cmpfunc = shadow_copy2_label_cmp_asc;
2118 } else if (strcmp(sort, "desc") == 0) {
2119 cmpfunc = shadow_copy2_label_cmp_desc;
2120 } else {
2121 return;
2122 }
2123
2124 if (shadow_copy2_data && shadow_copy2_data->num_volumes > 0 &&
2125 shadow_copy2_data->labels)
2126 {
2127 TYPESAFE_QSORT(shadow_copy2_data->labels,
2128 shadow_copy2_data->num_volumes,
2129 cmpfunc);
2130 }
2131 }
2132
2133 static int shadow_copy2_get_shadow_copy_data(
2134 vfs_handle_struct *handle, files_struct *fsp,
2135 struct shadow_copy_data *shadow_copy2_data,
2136 bool labels)
2137 {
2138 DIR *p;
2139 const char *snapdir;
2140 struct smb_filename *snapdir_smb_fname = NULL;
2141 struct dirent *d;
2142 TALLOC_CTX *tmp_ctx = talloc_stackframe();
2143 struct shadow_copy2_private *priv = NULL;
2144 struct shadow_copy2_snapentry *tmpentry = NULL;
2145 bool get_snaplist = false;
2146 bool access_granted = false;
2147 int ret = -1;
2148
2149 snapdir = shadow_copy2_find_snapdir(tmp_ctx, handle, fsp->fsp_name);
2150 if (snapdir == NULL) {
2151 DEBUG(0,("shadow:snapdir not found for %s in get_shadow_copy_data\n",
2152 handle->conn->connectpath));
2153 errno = EINVAL;
2154 goto done;
2155 }
2156
2157 access_granted = check_access_snapdir(handle, snapdir);
2158 if (!access_granted) {
2159 DEBUG(0,("access denied on listing snapdir %s\n", snapdir));
2160 errno = EACCES;
2161 goto done;
2162 }
2163
2164 snapdir_smb_fname = synthetic_smb_fname(talloc_tos(),
2165 snapdir,
2166 NULL,
2167 NULL,
2168 fsp->fsp_name->flags);
2169 if (snapdir_smb_fname == NULL) {
2170 errno = ENOMEM;
2171 goto done;
2172 }
2173
2174 p = SMB_VFS_NEXT_OPENDIR(handle, snapdir_smb_fname, NULL, 0);
2175
2176 if (!p) {
2177 DEBUG(2,("shadow_copy2: SMB_VFS_NEXT_OPENDIR() failed for '%s'"
2178 " - %s\n", snapdir, strerror(errno)));
2179 errno = ENOSYS;
2180 goto done;
2181 }
2182
2183 if (shadow_copy2_data != NULL) {
2184 shadow_copy2_data->num_volumes = 0;
2185 shadow_copy2_data->labels = NULL;
2186 }
2187
2188 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2189 goto done);
2190
2191 /*
2192 * Normally this function is called twice once with labels = false and
2193 * then with labels = true. When labels is false it will return the
2194 * number of volumes so that the caller can allocate memory for that
2195 * many labels. Therefore to eliminate snaplist both the times it is
2196 * good to check if labels is set or not.
2197 *
2198 * shadow_copy2_data is NULL when we only want to update the list and
2199 * don't want any labels.
2200 */
2201 if ((priv->snaps->regex != NULL) && (labels || shadow_copy2_data == NULL)) {
2202 get_snaplist = true;
2203 /* Reset the global snaplist */
2204 shadow_copy2_delete_snaplist(priv);
2205
2206 /* Set the current time as snaplist update time */
2207 time(&(priv->snaps->fetch_time));
2208 }
2209
2210 while ((d = SMB_VFS_NEXT_READDIR(handle, p, NULL))) {
2211 char snapshot[GMT_NAME_LEN+1];
2212 SHADOW_COPY_LABEL *tlabels;
2213
2214 /*
2215 * ignore names not of the right form in the snapshot
2216 * directory
2217 */
2218 if (!shadow_copy2_snapshot_to_gmt(
2219 handle, d->d_name,
2220 snapshot, sizeof(snapshot))) {
2221
2222 DEBUG(6, ("shadow_copy2_get_shadow_copy_data: "
2223 "ignoring %s\n", d->d_name));
2224 continue;
2225 }
2226 DEBUG(6,("shadow_copy2_get_shadow_copy_data: %s -> %s\n",
2227 d->d_name, snapshot));
2228
2229 if (get_snaplist) {
2230 /*
2231 * Create a snap entry for each successful
2232 * pattern match.
2233 */
2234 tmpentry = shadow_copy2_create_snapentry(priv);
2235 if (tmpentry == NULL) {
2236 DBG_ERR("talloc_zero() failed\n");
2237 goto done;
2238 }
2239 tmpentry->snapname = talloc_strdup(tmpentry, d->d_name);
2240 tmpentry->time_fmt = talloc_strdup(tmpentry, snapshot);
2241 }
2242
2243 if (shadow_copy2_data == NULL) {
2244 continue;
2245 }
2246
2247 if (!labels) {
2248 /* the caller doesn't want the labels */
2249 shadow_copy2_data->num_volumes++;
2250 continue;
2251 }
2252
2253 tlabels = talloc_realloc(shadow_copy2_data,
2254 shadow_copy2_data->labels,
2255 SHADOW_COPY_LABEL,
2256 shadow_copy2_data->num_volumes+1);
2257 if (tlabels == NULL) {
2258 DEBUG(0,("shadow_copy2: out of memory\n"));
2259 SMB_VFS_NEXT_CLOSEDIR(handle, p);
2260 goto done;
2261 }
2262
2263 strlcpy(tlabels[shadow_copy2_data->num_volumes], snapshot,
2264 sizeof(*tlabels));
2265
2266 shadow_copy2_data->num_volumes++;
2267 shadow_copy2_data->labels = tlabels;
2268 }
2269
2270 SMB_VFS_NEXT_CLOSEDIR(handle,p);
2271
2272 shadow_copy2_sort_data(handle, shadow_copy2_data);
2273 ret = 0;
2274
2275 done:
2276 TALLOC_FREE(tmp_ctx);
2277 return ret;
2278 }
2279
2280 static NTSTATUS shadow_copy2_fget_nt_acl(vfs_handle_struct *handle,
2281 struct files_struct *fsp,
2282 uint32_t security_info,
2283 TALLOC_CTX *mem_ctx,
2284 struct security_descriptor **ppdesc)
2285 {
2286 time_t timestamp = 0;
2287 char *stripped = NULL;
2288 NTSTATUS status;
2289 char *conv;
2290 struct smb_filename *smb_fname = NULL;
2291
2292 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
2293 fsp->fsp_name->base_name,
2294 &timestamp, &stripped)) {
2295 return map_nt_error_from_unix(errno);
2296 }
2297 if (timestamp == 0) {
2298 return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp, security_info,
2299 mem_ctx,
2300 ppdesc);
2301 }
2302 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2303 TALLOC_FREE(stripped);
2304 if (conv == NULL) {
2305 return map_nt_error_from_unix(errno);
2306 }
2307 smb_fname = synthetic_smb_fname(talloc_tos(),
2308 conv,
2309 NULL,
2310 NULL,
2311 fsp->fsp_name->flags);
2312 if (smb_fname == NULL) {
2313 TALLOC_FREE(conv);
2314 return NT_STATUS_NO_MEMORY;
2315 }
2316
2317 status = SMB_VFS_NEXT_GET_NT_ACL(handle, smb_fname, security_info,
2318 mem_ctx, ppdesc);
2319 TALLOC_FREE(conv);
2320 TALLOC_FREE(smb_fname);
2321 return status;
2322 }
2323
2324 static NTSTATUS shadow_copy2_get_nt_acl(vfs_handle_struct *handle,
2325 const struct smb_filename *smb_fname,
2326 uint32_t security_info,
2327 TALLOC_CTX *mem_ctx,
2328 struct security_descriptor **ppdesc)
2329 {
2330 time_t timestamp = 0;
2331 char *stripped = NULL;
2332 NTSTATUS status;
2333 char *conv;
2334 struct smb_filename *conv_smb_fname = NULL;
2335
2336 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2337 handle,
2338 smb_fname->base_name,
2339 &timestamp,
2340 &stripped)) {
2341 return map_nt_error_from_unix(errno);
2342 }
2343 if (timestamp == 0) {
2344 return SMB_VFS_NEXT_GET_NT_ACL(handle, smb_fname, security_info,
2345 mem_ctx, ppdesc);
2346 }
2347 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2348 TALLOC_FREE(stripped);
2349 if (conv == NULL) {
2350 return map_nt_error_from_unix(errno);
2351 }
2352 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2353 conv,
2354 NULL,
2355 NULL,
2356 smb_fname->flags);
2357 if (conv_smb_fname == NULL) {
2358 TALLOC_FREE(conv);
2359 return NT_STATUS_NO_MEMORY;
2360 }
2361 status = SMB_VFS_NEXT_GET_NT_ACL(handle, conv_smb_fname, security_info,
2362 mem_ctx, ppdesc);
2363 TALLOC_FREE(conv);
2364 TALLOC_FREE(conv_smb_fname);
2365 return status;
2366 }
2367
2368 static int shadow_copy2_mkdir(vfs_handle_struct *handle,
2369 const struct smb_filename *smb_fname,
2370 mode_t mode)
2371 {
2372 time_t timestamp = 0;
2373 char *stripped = NULL;
2374 int saved_errno = 0;
2375 int ret;
2376 char *conv;
2377 struct smb_filename *conv_smb_fname = NULL;
2378
2379 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2380 handle,
2381 smb_fname->base_name,
2382 &timestamp,
2383 &stripped)) {
2384 return -1;
2385 }
2386 if (timestamp == 0) {
2387 return SMB_VFS_NEXT_MKDIR(handle, smb_fname, mode);
2388 }
2389 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2390 TALLOC_FREE(stripped);
2391 if (conv == NULL) {
2392 return -1;
2393 }
2394 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2395 conv,
2396 NULL,
2397 NULL,
2398 smb_fname->flags);
2399 if (conv_smb_fname == NULL) {
2400 TALLOC_FREE(conv);
2401 return -1;
2402 }
2403 ret = SMB_VFS_NEXT_MKDIR(handle, conv_smb_fname, mode);
2404 if (ret == -1) {
2405 saved_errno = errno;
2406 }
2407 TALLOC_FREE(conv);
2408 TALLOC_FREE(conv_smb_fname);
2409 if (saved_errno != 0) {
2410 errno = saved_errno;
2411 }
2412 return ret;
2413 }
2414
2415 static int shadow_copy2_rmdir(vfs_handle_struct *handle,
2416 const struct smb_filename *smb_fname)
2417 {
2418 time_t timestamp = 0;
2419 char *stripped = NULL;
2420 int saved_errno = 0;
2421 int ret;
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_RMDIR(handle, smb_fname);
2434 }
2435 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2436 TALLOC_FREE(stripped);
2437 if (conv == NULL) {
2438 return -1;
2439 }
2440 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2441 conv,
2442 NULL,
2443 NULL,
2444 smb_fname->flags);
2445 if (conv_smb_fname == NULL) {
2446 TALLOC_FREE(conv);
2447 return -1;
2448 }
2449 ret = SMB_VFS_NEXT_RMDIR(handle, conv_smb_fname);
2450 if (ret == -1) {
2451 saved_errno = errno;
2452 }
2453 TALLOC_FREE(conv_smb_fname);
2454 TALLOC_FREE(conv);
2455 if (saved_errno != 0) {
2456 errno = saved_errno;
2457 }
2458 return ret;
2459 }
2460
2461 static int shadow_copy2_chflags(vfs_handle_struct *handle,
2462 const struct smb_filename *smb_fname,
2463 unsigned int flags)
2464 {
2465 time_t timestamp = 0;
2466 char *stripped = NULL;
2467 int saved_errno = 0;
2468 int ret;
2469 char *conv;
2470 struct smb_filename *conv_smb_fname = NULL;
2471
2472 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2473 handle,
2474 smb_fname->base_name,
2475 &timestamp,
2476 &stripped)) {
2477 return -1;
2478 }
2479 if (timestamp == 0) {
2480 return SMB_VFS_NEXT_CHFLAGS(handle, smb_fname, flags);
2481 }
2482 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2483 TALLOC_FREE(stripped);
2484 if (conv == NULL) {
2485 return -1;
2486 }
2487 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2488 conv,
2489 NULL,
2490 NULL,
2491 smb_fname->flags);
2492 if (conv_smb_fname == NULL) {
2493 TALLOC_FREE(conv);
2494 return -1;
2495 }
2496 ret = SMB_VFS_NEXT_CHFLAGS(handle, smb_fname, flags);
2497 if (ret == -1) {
2498 saved_errno = errno;
2499 }
2500 TALLOC_FREE(conv_smb_fname);
2501 TALLOC_FREE(conv);
2502 if (saved_errno != 0) {
2503 errno = saved_errno;
2504 }
2505 return ret;
2506 }
2507
2508 static ssize_t shadow_copy2_getxattr(vfs_handle_struct *handle,
2509 const struct smb_filename *smb_fname,
2510 const char *aname,
2511 void *value,
2512 size_t size)
2513 {
2514 time_t timestamp = 0;
2515 char *stripped = NULL;
2516 ssize_t ret;
2517 int saved_errno = 0;
2518 char *conv;
2519 struct smb_filename *conv_smb_fname = NULL;
2520
2521 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2522 handle,
2523 smb_fname->base_name,
2524 &timestamp,
2525 &stripped)) {
2526 return -1;
2527 }
2528 if (timestamp == 0) {
2529 return SMB_VFS_NEXT_GETXATTR(handle, smb_fname, aname, value,
2530 size);
2531 }
2532 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2533 TALLOC_FREE(stripped);
2534 if (conv == NULL) {
2535 return -1;
2536 }
2537
2538 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2539 conv,
2540 NULL,
2541 NULL,
2542 smb_fname->flags);
2543 if (conv_smb_fname == NULL) {
2544 TALLOC_FREE(conv);
2545 return -1;
2546 }
2547
2548 ret = SMB_VFS_NEXT_GETXATTR(handle, conv_smb_fname, aname, value, size);
2549 if (ret == -1) {
2550 saved_errno = errno;
2551 }
2552 TALLOC_FREE(conv_smb_fname);
2553 TALLOC_FREE(conv);
2554 if (saved_errno != 0) {
2555 errno = saved_errno;
2556 }
2557 return ret;
2558 }
2559
2560 static ssize_t shadow_copy2_listxattr(struct vfs_handle_struct *handle,
2561 const struct smb_filename *smb_fname,
2562 char *list, size_t size)
2563 {
2564 time_t timestamp = 0;
2565 char *stripped = NULL;
2566 ssize_t ret;
2567 int saved_errno = 0;
2568 char *conv;
2569 struct smb_filename *conv_smb_fname = NULL;
2570
2571 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2572 handle,
2573 smb_fname->base_name,
2574 &timestamp,
2575 &stripped)) {
2576 return -1;
2577 }
2578 if (timestamp == 0) {
2579 return SMB_VFS_NEXT_LISTXATTR(handle, smb_fname, list, size);
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_LISTXATTR(handle, conv_smb_fname, list, size);
2596 if (ret == -1) {
2597 saved_errno = errno;
2598 }
2599 TALLOC_FREE(conv_smb_fname);
2600 TALLOC_FREE(conv);
2601 if (saved_errno != 0) {
2602 errno = saved_errno;
2603 }
2604 return ret;
2605 }
2606
2607 static int shadow_copy2_removexattr(vfs_handle_struct *handle,
2608 const struct smb_filename *smb_fname,
2609 const char *aname)
2610 {
2611 time_t timestamp = 0;
2612 char *stripped = NULL;
2613 int saved_errno = 0;
2614 int ret;
2615 char *conv;
2616 struct smb_filename *conv_smb_fname = NULL;
2617
2618 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2619 handle,
2620 smb_fname->base_name,
2621 &timestamp,
2622 &stripped)) {
2623 return -1;
2624 }
2625 if (timestamp == 0) {
2626 return SMB_VFS_NEXT_REMOVEXATTR(handle, smb_fname, aname);
2627 }
2628 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2629 TALLOC_FREE(stripped);
2630 if (conv == NULL) {
2631 return -1;
2632 }
2633 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2634 conv,
2635 NULL,
2636 NULL,
2637 smb_fname->flags);
2638 if (conv_smb_fname == NULL) {
2639 TALLOC_FREE(conv);
2640 return -1;
2641 }
2642 ret = SMB_VFS_NEXT_REMOVEXATTR(handle, conv_smb_fname, aname);
2643 if (ret == -1) {
2644 saved_errno = errno;
2645 }
2646 TALLOC_FREE(conv_smb_fname);
2647 TALLOC_FREE(conv);
2648 if (saved_errno != 0) {
2649 errno = saved_errno;
2650 }
2651 return ret;
2652 }
2653
2654 static int shadow_copy2_setxattr(struct vfs_handle_struct *handle,
2655 const struct smb_filename *smb_fname,
2656 const char *aname, const void *value,
2657 size_t size, int flags)
2658 {
2659 time_t timestamp = 0;
2660 char *stripped = NULL;
2661 ssize_t ret;
2662 int saved_errno = 0;
2663 char *conv;
2664 struct smb_filename *conv_smb_fname = NULL;
2665
2666 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2667 handle,
2668 smb_fname->base_name,
2669 &timestamp,
2670 &stripped)) {
2671 return -1;
2672 }
2673 if (timestamp == 0) {
2674 return SMB_VFS_NEXT_SETXATTR(handle, smb_fname,
2675 aname, value, size, flags);
2676 }
2677 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2678 TALLOC_FREE(stripped);
2679 if (conv == NULL) {
2680 return -1;
2681 }
2682 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2683 conv,
2684 NULL,
2685 NULL,
2686 smb_fname->flags);
2687 if (conv_smb_fname == NULL) {
2688 TALLOC_FREE(conv);
2689 return -1;
2690 }
2691 ret = SMB_VFS_NEXT_SETXATTR(handle, conv_smb_fname,
2692 aname, value, size, flags);
2693 if (ret == -1) {
2694 saved_errno = errno;
2695 }
2696 TALLOC_FREE(conv_smb_fname);
2697 TALLOC_FREE(conv);
2698 if (saved_errno != 0) {
2699 errno = saved_errno;
2700 }
2701 return ret;
2702 }
2703
2704 static int shadow_copy2_get_real_filename(struct vfs_handle_struct *handle,
2705 const char *path,
2706 const char *name,
2707 TALLOC_CTX *mem_ctx,
2708 char **found_name)
2709 {
2710 time_t timestamp = 0;
2711 char *stripped = NULL;
2712 ssize_t ret;
2713 int saved_errno = 0;
2714 char *conv;
2715
2716 DEBUG(10, ("shadow_copy2_get_real_filename called for path=[%s], "
2717 "name=[%s]\n", path, name));
2718
2719 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, path,
2720 &timestamp, &stripped)) {
2721 DEBUG(10, ("shadow_copy2_strip_snapshot failed\n"));
2722 return -1;
2723 }
2724 if (timestamp == 0) {
2725 DEBUG(10, ("timestamp == 0\n"));
2726 return SMB_VFS_NEXT_GET_REAL_FILENAME(handle, path, name,
2727 mem_ctx, found_name);
2728 }
2729 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2730 TALLOC_FREE(stripped);
2731 if (conv == NULL) {
2732 DEBUG(10, ("shadow_copy2_convert failed\n"));
2733 return -1;
2734 }
2735 DEBUG(10, ("Calling NEXT_GET_REAL_FILE_NAME for conv=[%s], "
2736 "name=[%s]\n", conv, name));
2737 ret = SMB_VFS_NEXT_GET_REAL_FILENAME(handle, conv, name,
2738 mem_ctx, found_name);
2739 DEBUG(10, ("NEXT_REAL_FILE_NAME returned %d\n", (int)ret));
2740 if (ret == -1) {
2741 saved_errno = errno;
2742 }
2743 TALLOC_FREE(conv);
2744 if (saved_errno != 0) {
2745 errno = saved_errno;
2746 }
2747 return ret;
2748 }
2749
2750 static const char *shadow_copy2_connectpath(struct vfs_handle_struct *handle,
2751 const struct smb_filename *smb_fname_in)
2752 {
2753 time_t timestamp = 0;
2754 char *stripped = NULL;
2755 char *tmp = NULL;
2756 const char *fname = smb_fname_in->base_name;
2757 struct smb_filename smb_fname = {0};
2758 struct smb_filename *result_fname = NULL;
2759 char *result = NULL;
2760 char *parent_dir = NULL;
2761 int saved_errno = 0;
2762 size_t rootpath_len = 0;
2763 struct shadow_copy2_private *priv = NULL;
2764
2765 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2766 return NULL);
2767
2768 DBG_DEBUG("Calc connect path for [%s]\n", fname);
2769
2770 if (priv->shadow_connectpath != NULL) {
2771 DBG_DEBUG("cached connect path is [%s]\n",
2772 priv->shadow_connectpath);
2773 return priv->shadow_connectpath;
2774 }
2775
2776 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
2777 &timestamp, &stripped)) {
2778 goto done;
2779 }
2780 if (timestamp == 0) {
2781 return SMB_VFS_NEXT_CONNECTPATH(handle, smb_fname_in);
2782 }
2783
2784 tmp = shadow_copy2_do_convert(talloc_tos(), handle, stripped, timestamp,
2785 &rootpath_len);
2786 if (tmp == NULL) {
2787 if (errno != ENOENT) {
2788 goto done;
2789 }
2790
2791 /*
2792 * If the converted path does not exist, and converting
2793 * the parent yields something that does exist, then
2794 * this path refers to something that has not been
2795 * created yet, relative to the parent path.
2796 * The snapshot finding is relative to the parent.
2797 * (usually snapshots are read/only but this is not
2798 * necessarily true).
2799 * This code also covers getting a wildcard in the
2800 * last component, because this function is called
2801 * prior to sanitizing the path, and in SMB1 we may
2802 * get wildcards in path names.
2803 */
2804 if (!parent_dirname(talloc_tos(), stripped, &parent_dir,
2805 NULL)) {
2806 errno = ENOMEM;
2807 goto done;
2808 }
2809
2810 tmp = shadow_copy2_do_convert(talloc_tos(), handle, parent_dir,
2811 timestamp, &rootpath_len);
2812 if (tmp == NULL) {
2813 goto done;
2814 }
2815 }
2816
2817 DBG_DEBUG("converted path is [%s] root path is [%.*s]\n", tmp,
2818 (int)rootpath_len, tmp);
2819
2820 tmp[rootpath_len] = '\0';
2821 smb_fname = (struct smb_filename) { .base_name = tmp };
2822
2823 result_fname = SMB_VFS_NEXT_REALPATH(handle, priv, &smb_fname);
2824 if (result_fname == NULL) {
2825 goto done;
2826 }
2827
2828 /*
2829 * SMB_VFS_NEXT_REALPATH returns a talloc'ed string.
2830 * Don't leak memory.
2831 */
2832 TALLOC_FREE(priv->shadow_realpath);
2833 priv->shadow_realpath = result_fname;
2834 result = priv->shadow_realpath->base_name;
2835
2836 DBG_DEBUG("connect path is [%s]\n", result);
2837
2838 done:
2839 if (result == NULL) {
2840 saved_errno = errno;
2841 }
2842 TALLOC_FREE(tmp);
2843 TALLOC_FREE(stripped);
2844 TALLOC_FREE(parent_dir);
2845 if (saved_errno != 0) {
2846 errno = saved_errno;
2847 }
2848 return result;
2849 }
2850
2851 static uint64_t shadow_copy2_disk_free(vfs_handle_struct *handle,
2852 const struct smb_filename *smb_fname,
2853 uint64_t *bsize,
2854 uint64_t *dfree,
2855 uint64_t *dsize)
2856 {
2857 time_t timestamp = 0;
2858 char *stripped = NULL;
2859 int saved_errno = 0;
2860 char *conv = NULL;
2861 struct smb_filename *conv_smb_fname = NULL;
2862 uint64_t ret = (uint64_t)-1;
2863
2864 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2865 handle,
2866 smb_fname->base_name,
2867 &timestamp,
2868 &stripped)) {
2869 return (uint64_t)-1;
2870 }
2871 if (timestamp == 0) {
2872 return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname,
2873 bsize, dfree, dsize);
2874 }
2875 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2876 TALLOC_FREE(stripped);
2877 if (conv == NULL) {
2878 return (uint64_t)-1;
2879 }
2880 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2881 conv,
2882 NULL,
2883 NULL,
2884 smb_fname->flags);
2885 if (conv_smb_fname == NULL) {
2886 TALLOC_FREE(conv);
2887 return (uint64_t)-1;
2888 }
2889 ret = SMB_VFS_NEXT_DISK_FREE(handle, conv_smb_fname,
2890 bsize, dfree, dsize);
2891 if (ret == (uint64_t)-1) {
2892 saved_errno = errno;
2893 }
2894 TALLOC_FREE(conv);
2895 TALLOC_FREE(conv_smb_fname);
2896 if (saved_errno != 0) {
2897 errno = saved_errno;
2898 }
2899 return ret;
2900 }
2901
2902 static int shadow_copy2_get_quota(vfs_handle_struct *handle,
2903 const struct smb_filename *smb_fname,
2904 enum SMB_QUOTA_TYPE qtype,
2905 unid_t id,
2906 SMB_DISK_QUOTA *dq)
2907 {
2908 time_t timestamp = 0;
2909 char *stripped = NULL;
2910 int ret;
2911 int saved_errno = 0;
2912 char *conv;
2913 struct smb_filename *conv_smb_fname = NULL;
2914
2915 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2916 handle,
2917 smb_fname->base_name,
2918 &timestamp,
2919 &stripped)) {
2920 return -1;
2921 }
2922 if (timestamp == 0) {
2923 return SMB_VFS_NEXT_GET_QUOTA(handle, smb_fname, qtype, id, dq);
2924 }
2925
2926 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2927 TALLOC_FREE(stripped);
2928 if (conv == NULL) {
2929 return -1;
2930 }
2931 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2932 conv,
2933 NULL,
2934 NULL,
2935 smb_fname->flags);
2936 if (conv_smb_fname == NULL) {
2937 TALLOC_FREE(conv);
2938 return -1;
2939 }
2940 ret = SMB_VFS_NEXT_GET_QUOTA(handle, conv_smb_fname, qtype, id, dq);
2941
2942 if (ret == -1) {
2943 saved_errno = errno;
2944 }
2945 TALLOC_FREE(conv);
2946 TALLOC_FREE(conv_smb_fname);
2947 if (saved_errno != 0) {
2948 errno = saved_errno;
2949 }
2950
2951 return ret;
2952 }
2953
2954 static ssize_t shadow_copy2_pwrite(vfs_handle_struct *handle,
2955 files_struct *fsp,
2956 const void *data,
2957 size_t n,
2958 off_t offset)
2959 {
2960 ssize_t nwritten;
2961
2962 nwritten = SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
2963 if (nwritten == -1) {
2964 if (errno == EBADF && fsp->can_write) {
2965 errno = EROFS;
2966 }
2967 }
2968
2969 return nwritten;
2970 }
2971
2972 struct shadow_copy2_pwrite_state {
2973 vfs_handle_struct *handle;
2974 files_struct *fsp;
2975 ssize_t ret;
2976 struct vfs_aio_state vfs_aio_state;
2977 };
2978
2979 static void shadow_copy2_pwrite_done(struct tevent_req *subreq);
2980
2981 static struct tevent_req *shadow_copy2_pwrite_send(
2982 struct vfs_handle_struct *handle, TALLOC_CTX *mem_ctx,
2983 struct tevent_context *ev, struct files_struct *fsp,
2984 const void *data, size_t n, off_t offset)
2985 {
2986 struct tevent_req *req = NULL, *subreq = NULL;
2987 struct shadow_copy2_pwrite_state *state = NULL;
2988
2989 req = tevent_req_create(mem_ctx, &state,
2990 struct shadow_copy2_pwrite_state);
2991 if (req == NULL) {
2992 return NULL;
2993 }
2994 state->handle = handle;
2995 state->fsp = fsp;
2996
2997 subreq = SMB_VFS_NEXT_PWRITE_SEND(state,
2998 ev,
2999 handle,
3000 fsp,
3001 data,
3002 n,
3003 offset);
3004 if (tevent_req_nomem(subreq, req)) {
3005 return tevent_req_post(req, ev);
3006 }
3007 tevent_req_set_callback(subreq, shadow_copy2_pwrite_done, req);
3008
3009 return req;
3010 }
3011
3012 static void shadow_copy2_pwrite_done(struct tevent_req *subreq)
3013 {
3014 struct tevent_req *req = tevent_req_callback_data(
3015 subreq, struct tevent_req);
3016 struct shadow_copy2_pwrite_state *state = tevent_req_data(
3017 req, struct shadow_copy2_pwrite_state);
3018
3019 state->ret = SMB_VFS_PWRITE_RECV(subreq, &state->vfs_aio_state);
3020 TALLOC_FREE(subreq);
3021 if (state->ret == -1) {
3022 tevent_req_error(req, state->vfs_aio_state.error);
3023 return;
3024 }
3025
3026 tevent_req_done(req);
3027 }
3028
3029 static ssize_t shadow_copy2_pwrite_recv(struct tevent_req *req,
3030 struct vfs_aio_state *vfs_aio_state)
3031 {
3032 struct shadow_copy2_pwrite_state *state = tevent_req_data(
3033 req, struct shadow_copy2_pwrite_state);
3034
3035 if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
3036 if ((vfs_aio_state->error == EBADF) &&
3037 state->fsp->can_write)
3038 {
3039 vfs_aio_state->error = EROFS;
3040 errno = EROFS;
3041 }
3042 return -1;
3043 }
3044
3045 *vfs_aio_state = state->vfs_aio_state;
3046 return state->ret;
3047 }
3048
3049 static int shadow_copy2_connect(struct vfs_handle_struct *handle,
3050 const char *service, const char *user)
3051 {
3052 struct shadow_copy2_config *config;
3053 struct shadow_copy2_private *priv;
3054 int ret;
3055 const char *snapdir;
3056 const char *snapprefix = NULL;
3057 const char *delimiter;
3058 const char *gmt_format;
3059 const char *sort_order;
3060 const char *basedir = NULL;
3061 const char *snapsharepath = NULL;
3062 const char *mount_point;
3063
3064 DEBUG(10, (__location__ ": cnum[%u], connectpath[%s]\n",
3065 (unsigned)handle->conn->cnum,
3066 handle->conn->connectpath));
3067
3068 ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
3069 if (ret < 0) {
3070 return ret;
3071 }
3072
3073 priv = talloc_zero(handle->conn, struct shadow_copy2_private);
3074 if (priv == NULL) {
3075 DBG_ERR("talloc_zero() failed\n");
3076 errno = ENOMEM;
3077 return -1;
3078 }
3079
3080 priv->snaps = talloc_zero(priv, struct shadow_copy2_snaplist_info);
3081 if (priv->snaps == NULL) {
3082 DBG_ERR("talloc_zero() failed\n");
3083 errno = ENOMEM;
3084 return -1;
3085 }
3086
3087 config = talloc_zero(priv, struct shadow_copy2_config);
3088 if (config == NULL) {
3089 DEBUG(0, ("talloc_zero() failed\n"));
3090 errno = ENOMEM;
3091 return -1;
3092 }
3093
3094 priv->config = config;
3095
3096 gmt_format = lp_parm_const_string(SNUM(handle->conn),
3097 "shadow", "format",
3098 GMT_FORMAT);
3099 config->gmt_format = talloc_strdup(config, gmt_format);
3100 if (config->gmt_format == NULL) {
3101 DEBUG(0, ("talloc_strdup() failed\n"));
3102 errno = ENOMEM;
3103 return -1;
3104 }
3105
3106 /* config->gmt_format must not contain a path separator. */
3107 if (strchr(config->gmt_format, '/') != NULL) {
3108 DEBUG(0, ("shadow:format %s must not contain a /"
3109 "character. Unable to initialize module.\n",
3110 config->gmt_format));
3111 errno = EINVAL;
3112 return -1;
3113 }
3114
3115 config->use_sscanf = lp_parm_bool(SNUM(handle->conn),
3116 "shadow", "sscanf", false);
3117
3118 config->use_localtime = lp_parm_bool(SNUM(handle->conn),
3119 "shadow", "localtime",
3120 false);
3121
3122 snapdir = lp_parm_const_string(SNUM(handle->conn),
3123 "shadow", "snapdir",
3124 ".snapshots");
3125 config->snapdir = talloc_strdup(config, snapdir);
3126 if (config->snapdir == NULL) {
3127 DEBUG(0, ("talloc_strdup() failed\n"));
3128 errno = ENOMEM;
3129 return -1;
3130 }
3131
3132 snapprefix = lp_parm_const_string(SNUM(handle->conn),
3133 "shadow", "snapprefix",
3134 NULL);
3135 if (snapprefix != NULL) {
3136 priv->snaps->regex = talloc_zero(priv->snaps, regex_t);
3137 if (priv->snaps->regex == NULL) {
3138 DBG_ERR("talloc_zero() failed\n");
3139 errno = ENOMEM;
3140 return -1;
3141 }
3142
3143 /* pre-compute regex rule for matching pattern later */
3144 ret = regcomp(priv->snaps->regex, snapprefix, 0);
3145 if (ret) {
3146 DBG_ERR("Failed to create regex object\n");
3147 return -1;
3148 }
3149 }
3150
3151 delimiter = lp_parm_const_string(SNUM(handle->conn),
3152 "shadow", "delimiter",
3153 "_GMT");
3154 if (delimiter != NULL) {
3155 priv->config->delimiter = talloc_strdup(priv->config, delimiter);
3156 if (priv->config->delimiter == NULL) {
3157 DBG_ERR("talloc_strdup() failed\n");
3158 errno = ENOMEM;
3159 return -1;
3160 }
3161 }
3162
3163 config->snapdirseverywhere = lp_parm_bool(SNUM(handle->conn),
3164 "shadow",
3165 "snapdirseverywhere",
3166 false);
3167
3168 config->crossmountpoints = lp_parm_bool(SNUM(handle->conn),
3169 "shadow", "crossmountpoints",
3170 false);
3171
3172 if (config->crossmountpoints && !config->snapdirseverywhere) {
3173 DBG_WARNING("Warning: 'crossmountpoints' depends on "
3174 "'snapdirseverywhere'. Disabling crossmountpoints.\n");
3175 }
3176
3177 config->fixinodes = lp_parm_bool(SNUM(handle->conn),
3178 "shadow", "fixinodes",
3179 false);
3180
3181 sort_order = lp_parm_const_string(SNUM(handle->conn),
3182 "shadow", "sort", "desc");
3183 config->sort_order = talloc_strdup(config, sort_order);
3184 if (config->sort_order == NULL) {
3185 DEBUG(0, ("talloc_strdup() failed\n"));
3186 errno = ENOMEM;
3187 return -1;
3188 }
3189
3190 mount_point = lp_parm_const_string(SNUM(handle->conn),
3191 "shadow", "mountpoint", NULL);
3192 if (mount_point != NULL) {
3193 if (mount_point[0] != '/') {
3194 DEBUG(1, (__location__ " Warning: 'mountpoint' is "
3195 "relative ('%s'), but it has to be an "
3196 "absolute path. Ignoring provided value.\n",
3197 mount_point));
3198 mount_point = NULL;
3199 } else {
3200 char *p;
3201 p = strstr(handle->conn->connectpath, mount_point);
3202 if (p != handle->conn->connectpath) {
3203 DBG_WARNING("Warning: the share root (%s) is "
3204 "not a subdirectory of the "
3205 "specified mountpoint (%s). "
3206 "Ignoring provided value.\n",
3207 handle->conn->connectpath,
3208 mount_point);
3209 mount_point = NULL;
3210 }
3211 }
3212 }
3213
3214 if (mount_point != NULL) {
3215 config->mount_point = talloc_strdup(config, mount_point);
3216 if (config->mount_point == NULL) {
3217 DEBUG(0, (__location__ " talloc_strdup() failed\n"));
3218 return -1;
3219 }
3220 } else {
3221 config->mount_point = shadow_copy2_find_mount_point(config,
3222 handle);
3223 if (config->mount_point == NULL) {
3224 DBG_WARNING("shadow_copy2_find_mount_point "
3225 "of the share root '%s' failed: %s\n",
3226 handle->conn->connectpath, strerror(errno));
3227 return -1;
3228 }
3229 }
3230
3231 basedir = lp_parm_const_string(SNUM(handle->conn),
3232 "shadow", "basedir", NULL);
3233
3234 if (basedir != NULL) {
3235 if (basedir[0] != '/') {
3236 DEBUG(1, (__location__ " Warning: 'basedir' is "
3237 "relative ('%s'), but it has to be an "
3238 "absolute path. Disabling basedir.\n",
3239 basedir));
3240 basedir = NULL;
3241 } else {
3242 char *p;
3243 p = strstr(basedir, config->mount_point);
3244 if (p != basedir) {
3245 DEBUG(1, ("Warning: basedir (%s) is not a "
3246 "subdirectory of the share root's "
3247 "mount point (%s). "
3248 "Disabling basedir\n",
3249 basedir, config->mount_point));
3250 basedir = NULL;
3251 }
3252 }
3253 }
3254
3255 if (config->snapdirseverywhere && basedir != NULL) {
3256 DEBUG(1, (__location__ " Warning: 'basedir' is incompatible "
3257 "with 'snapdirseverywhere'. Disabling basedir.\n"));
3258 basedir = NULL;
3259 }
3260
3261 snapsharepath = lp_parm_const_string(SNUM(handle->conn), "shadow",
3262 "snapsharepath", NULL);
3263 if (snapsharepath != NULL) {
3264 if (snapsharepath[0] == '/') {
3265 DBG_WARNING("Warning: 'snapsharepath' is "
3266 "absolute ('%s'), but it has to be a "
3267 "relative path. Disabling snapsharepath.\n",
3268 snapsharepath);
3269 snapsharepath = NULL;
3270 }
3271 if (config->snapdirseverywhere && snapsharepath != NULL) {
3272 DBG_WARNING("Warning: 'snapsharepath' is incompatible "
3273 "with 'snapdirseverywhere'. Disabling "
3274 "snapsharepath.\n");
3275 snapsharepath = NULL;
3276 }
3277 }
3278
3279 if (basedir != NULL && snapsharepath != NULL) {
3280 DBG_WARNING("Warning: 'snapsharepath' is incompatible with "
3281 "'basedir'. Disabling snapsharepath\n");
3282 snapsharepath = NULL;
3283 }
3284
3285 if (snapsharepath != NULL) {
3286 config->rel_connectpath = talloc_strdup(config, snapsharepath);
3287 if (config->rel_connectpath == NULL) {
3288 DBG_ERR("talloc_strdup() failed\n");
3289 errno = ENOMEM;
3290 return -1;
3291 }
3292 }
3293
3294 if (basedir == NULL) {
3295 basedir = config->mount_point;
3296 }
3297
3298 if (config->rel_connectpath == NULL &&
3299 strlen(basedir) < strlen(handle->conn->connectpath)) {
3300 config->rel_connectpath = talloc_strdup(config,
3301 handle->conn->connectpath + strlen(basedir));
3302 if (config->rel_connectpath == NULL) {
3303 DEBUG(0, ("talloc_strdup() failed\n"));
3304 errno = ENOMEM;
3305 return -1;
3306 }
3307 }
3308
3309 if (config->snapdir[0] == '/') {
3310 config->snapdir_absolute = true;
3311
3312 if (config->snapdirseverywhere == true) {
3313 DEBUG(1, (__location__ " Warning: An absolute snapdir "
3314 "is incompatible with 'snapdirseverywhere', "
3315 "setting 'snapdirseverywhere' to false.\n"));
3316 config->snapdirseverywhere = false;
3317 }
3318
3319 if (config->crossmountpoints == true) {
3320 DEBUG(1, (__location__ " Warning: 'crossmountpoints' "
3321 "is not supported with an absolute snapdir. "
3322 "Disabling it.\n"));
3323 config->crossmountpoints = false;
3324 }
3325
3326 config->snapshot_basepath = config->snapdir;
3327 } else {
3328 config->snapshot_basepath = talloc_asprintf(config, "%s/%s",
3329 config->mount_point, config->snapdir);
3330 if (config->snapshot_basepath == NULL) {
3331 DEBUG(0, ("talloc_asprintf() failed\n"));
3332 errno = ENOMEM;
3333 return -1;
3334 }
3335 }
3336
3337 trim_string(config->mount_point, NULL, "/");
3338 trim_string(config->rel_connectpath, "/", "/");
3339 trim_string(config->snapdir, NULL, "/");
3340 trim_string(config->snapshot_basepath, NULL, "/");
3341
3342 DEBUG(10, ("shadow_copy2_connect: configuration:\n"
3343 " share root: '%s'\n"
3344 " mountpoint: '%s'\n"
3345 " rel share root: '%s'\n"
3346 " snapdir: '%s'\n"
3347 " snapprefix: '%s'\n"
3348 " delimiter: '%s'\n"
3349 " snapshot base path: '%s'\n"
3350 " format: '%s'\n"
3351 " use sscanf: %s\n"
3352 " snapdirs everywhere: %s\n"
3353 " cross mountpoints: %s\n"
3354 " fix inodes: %s\n"
3355 " sort order: %s\n"
3356 "",
3357 handle->conn->connectpath,
3358 config->mount_point,
3359 config->rel_connectpath,
3360 config->snapdir,
3361 snapprefix,
3362 config->delimiter,
3363 config->snapshot_basepath,
3364 config->gmt_format,
3365 config->use_sscanf ? "yes" : "no",
3366 config->snapdirseverywhere ? "yes" : "no",
3367 config->crossmountpoints ? "yes" : "no",
3368 config->fixinodes ? "yes" : "no",
3369 config->sort_order
3370 ));
3371
3372
3373 SMB_VFS_HANDLE_SET_DATA(handle, priv,
3374 NULL, struct shadow_copy2_private,
3375 return -1);
3376
3377 return 0;
3378 }
3379
3380 static struct vfs_fn_pointers vfs_shadow_copy2_fns = {
3381 .connect_fn = shadow_copy2_connect,
3382 .opendir_fn = shadow_copy2_opendir,
3383 .disk_free_fn = shadow_copy2_disk_free,
3384 .get_quota_fn = shadow_copy2_get_quota,
3385 .rename_fn = shadow_copy2_rename,
3386 .link_fn = shadow_copy2_link,
3387 .symlink_fn = shadow_copy2_symlink,
3388 .stat_fn = shadow_copy2_stat,
3389 .lstat_fn = shadow_copy2_lstat,
3390 .fstat_fn = shadow_copy2_fstat,
3391 .open_fn = shadow_copy2_open,
3392 .unlink_fn = shadow_copy2_unlink,
3393 .chmod_fn = shadow_copy2_chmod,
3394 .chown_fn = shadow_copy2_chown,
3395 .chdir_fn = shadow_copy2_chdir,
3396 .ntimes_fn = shadow_copy2_ntimes,
3397 .readlink_fn = shadow_copy2_readlink,
3398 .mknod_fn = shadow_copy2_mknod,
3399 .realpath_fn = shadow_copy2_realpath,
3400 .get_nt_acl_fn = shadow_copy2_get_nt_acl,
3401 .fget_nt_acl_fn = shadow_copy2_fget_nt_acl,
3402 .get_shadow_copy_data_fn = shadow_copy2_get_shadow_copy_data,
3403 .mkdir_fn = shadow_copy2_mkdir,
3404 .rmdir_fn = shadow_copy2_rmdir,
3405 .getxattr_fn = shadow_copy2_getxattr,
3406 .getxattrat_send_fn = vfs_not_implemented_getxattrat_send,
3407 .getxattrat_recv_fn = vfs_not_implemented_getxattrat_recv,
3408 .listxattr_fn = shadow_copy2_listxattr,
3409 .removexattr_fn = shadow_copy2_removexattr,
3410 .setxattr_fn = shadow_copy2_setxattr,
3411 .chflags_fn = shadow_copy2_chflags,
3412 .get_real_filename_fn = shadow_copy2_get_real_filename,
3413 .pwrite_fn = shadow_copy2_pwrite,
3414 .pwrite_send_fn = shadow_copy2_pwrite_send,
3415 .pwrite_recv_fn = shadow_copy2_pwrite_recv,
3416 .connectpath_fn = shadow_copy2_connectpath,
3417 };
3418
3419 static_decl_vfs;
3420 NTSTATUS vfs_shadow_copy2_init(TALLOC_CTX *ctx)
3421 {
3422 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
3423 "shadow_copy2", &vfs_shadow_copy2_fns);
3424 }
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