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s4:torture: Initialize param arrays
[Samba.git] / source3 / modules / vfs_shadow_copy2.c
blob9d3f5843f43f1ee7210028db25d92646b27ffe47
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 implementation 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 * shadow_copy2 private structure. This structure will be
74 * used to keep module specific information
75 */
76 struct shadow_copy2_private {
77 struct shadow_copy2_config *config;
78 struct shadow_copy2_snaplist_info *snaps;
79 char *shadow_cwd; /* Absolute $cwd path. */
80 /* Absolute connectpath - can vary depending on $cwd. */
81 char *shadow_connectpath;
82 /* talloc'ed realpath return. */
83 struct smb_filename *shadow_realpath;
84 };
85
86 static int shadow_copy2_get_shadow_copy_data(
87 vfs_handle_struct *handle, files_struct *fsp,
88 struct shadow_copy_data *shadow_copy2_data,
89 bool labels);
90
91 /**
92 * This function will create a new snapshot list entry and
93 * return to the caller. This entry will also be added to
94 * the global snapshot list.
95 *
96 * @param[in] priv shadow_copy2 specific data structure
97 * @return Newly created snapshot entry or NULL on failure
98 */
99 static struct shadow_copy2_snapentry *shadow_copy2_create_snapentry(
100 struct shadow_copy2_private *priv)
101 {
102 struct shadow_copy2_snapentry *tmpentry = NULL;
103
104 tmpentry = talloc_zero(priv->snaps, struct shadow_copy2_snapentry);
105 if (tmpentry == NULL) {
106 DBG_ERR("talloc_zero() failed\n");
107 errno = ENOMEM;
108 return NULL;
109 }
110
111 DLIST_ADD(priv->snaps->snaplist, tmpentry);
112
113 return tmpentry;
114 }
115
116 /**
117 * This function will delete the entire snaplist and reset
118 * priv->snaps->snaplist to NULL.
119 *
120 * @param[in] priv shadow_copye specific data structure
121 */
122 static void shadow_copy2_delete_snaplist(struct shadow_copy2_private *priv)
123 {
124 struct shadow_copy2_snapentry *tmp = NULL;
125
126 while ((tmp = priv->snaps->snaplist) != NULL) {
127 DLIST_REMOVE(priv->snaps->snaplist, tmp);
128 talloc_free(tmp);
129 }
130 }
131
132 /**
133 * Given a timestamp this function searches the global snapshot list
134 * and returns the complete snapshot directory name saved in the entry.
135 *
136 * @param[in] priv shadow_copy2 specific structure
137 * @param[in] timestamp timestamp corresponding to one of the snapshot
138 * @param[out] snap_str buffer to copy the actual snapshot name
139 * @param[in] len length of snap_str buffer
140 *
141 * @return Length of actual snapshot name, and -1 on failure
142 */
143 static ssize_t shadow_copy2_saved_snapname(struct shadow_copy2_private *priv,
144 struct tm *timestamp,
145 char *snap_str, size_t len)
146 {
147 ssize_t snaptime_len = -1;
148 struct shadow_copy2_snapentry *entry = NULL;
149
150 snaptime_len = strftime(snap_str, len, GMT_FORMAT, timestamp);
151 if (snaptime_len == 0) {
152 DBG_ERR("strftime failed\n");
153 return -1;
154 }
155
156 snaptime_len = -1;
157
158 for (entry = priv->snaps->snaplist; entry; entry = entry->next) {
159 if (strcmp(entry->time_fmt, snap_str) == 0) {
160 snaptime_len = snprintf(snap_str, len, "%s",
161 entry->snapname);
162 return snaptime_len;
163 }
164 }
165
166 snap_str[0] = 0;
167 return snaptime_len;
168 }
169
170
171 /**
172 * This function will check if snaplist is updated or not. If snaplist
173 * is empty then it will create a new list. Each time snaplist is updated
174 * the time is recorded. If the snapshot time is greater than the snaplist
175 * update time then chances are we are working on an older list. Then discard
176 * the old list and fetch a new snaplist.
177 *
178 * @param[in] handle VFS handle struct
179 * @param[in] snap_time time of snapshot
180 *
181 * @return true if the list is updated else false
182 */
183 static bool shadow_copy2_update_snaplist(struct vfs_handle_struct *handle,
184 time_t snap_time)
185 {
186 int ret = -1;
187 bool snaplist_updated = false;
188 struct files_struct fsp = {0};
189 struct smb_filename smb_fname = {0};
190 double seconds = 0.0;
191 struct shadow_copy2_private *priv = NULL;
192
193 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
194 return false);
195
196 seconds = difftime(snap_time, priv->snaps->fetch_time);
197
198 /*
199 * Fetch the snapshot list if either the snaplist is empty or the
200 * required snapshot time is greater than the last fetched snaplist
201 * time.
202 */
203 if (seconds > 0 || (priv->snaps->snaplist == NULL)) {
204 smb_fname.base_name = discard_const_p(char, ".");
205 fsp.fsp_name = &smb_fname;
206
207 ret = shadow_copy2_get_shadow_copy_data(handle, &fsp,
208 NULL, false);
209 if (ret == 0) {
210 snaplist_updated = true;
211 } else {
212 DBG_ERR("Failed to get shadow copy data\n");
213 }
214
215 }
216
217 return snaplist_updated;
218 }
219
220 static bool shadow_copy2_find_slashes(TALLOC_CTX *mem_ctx, const char *str,
221 size_t **poffsets,
222 unsigned *pnum_offsets)
223 {
224 unsigned num_offsets;
225 size_t *offsets;
226 const char *p;
227
228 num_offsets = 0;
229
230 p = str;
231 while ((p = strchr(p, '/')) != NULL) {
232 num_offsets += 1;
233 p += 1;
234 }
235
236 offsets = talloc_array(mem_ctx, size_t, num_offsets);
237 if (offsets == NULL) {
238 return false;
239 }
240
241 p = str;
242 num_offsets = 0;
243 while ((p = strchr(p, '/')) != NULL) {
244 offsets[num_offsets] = p-str;
245 num_offsets += 1;
246 p += 1;
247 }
248
249 *poffsets = offsets;
250 *pnum_offsets = num_offsets;
251 return true;
252 }
253
254 /**
255 * Given a timestamp, build the posix level GMT-tag string
256 * based on the configurable format.
257 */
258 static ssize_t shadow_copy2_posix_gmt_string(struct vfs_handle_struct *handle,
259 time_t snapshot,
260 char *snaptime_string,
261 size_t len)
262 {
263 struct tm snap_tm;
264 ssize_t snaptime_len;
265 struct shadow_copy2_config *config;
266 struct shadow_copy2_private *priv;
267
268 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
269 return 0);
270
271 config = priv->config;
272
273 if (config->use_sscanf) {
274 snaptime_len = snprintf(snaptime_string,
275 len,
276 config->gmt_format,
277 (unsigned long)snapshot);
278 if (snaptime_len <= 0) {
279 DEBUG(10, ("snprintf failed\n"));
280 return -1;
281 }
282 } else {
283 if (config->use_localtime) {
284 if (localtime_r(&snapshot, &snap_tm) == 0) {
285 DEBUG(10, ("gmtime_r failed\n"));
286 return -1;
287 }
288 } else {
289 if (gmtime_r(&snapshot, &snap_tm) == 0) {
290 DEBUG(10, ("gmtime_r failed\n"));
291 return -1;
292 }
293 }
294
295 if (priv->snaps->regex != NULL) {
296 snaptime_len = shadow_copy2_saved_snapname(priv,
297 &snap_tm, snaptime_string, len);
298 if (snaptime_len >= 0)
299 return snaptime_len;
300
301 /*
302 * If we fail to find the snapshot name, chances are
303 * that we have not updated our snaplist. Make sure the
304 * snaplist is updated.
305 */
306 if (!shadow_copy2_update_snaplist(handle, snapshot)) {
307 DBG_DEBUG("shadow_copy2_update_snaplist "
308 "failed\n");
309 return -1;
310 }
311
312 return shadow_copy2_saved_snapname(priv,
313 &snap_tm, snaptime_string, len);
314 }
315
316 snaptime_len = strftime(snaptime_string,
317 len,
318 config->gmt_format,
319 &snap_tm);
320 if (snaptime_len == 0) {
321 DEBUG(10, ("strftime failed\n"));
322 return -1;
323 }
324 }
325
326 return snaptime_len;
327 }
328
329 /**
330 * Given a timestamp, build the string to insert into a path
331 * as a path component for creating the local path to the
332 * snapshot at the given timestamp of the input path.
333 *
334 * In the case of a parallel snapdir (specified with an
335 * absolute path), this is the initial portion of the
336 * local path of any snapshot file. The complete path is
337 * obtained by appending the portion of the file's path
338 * below the share root's mountpoint.
339 */
340 static char *shadow_copy2_insert_string(TALLOC_CTX *mem_ctx,
341 struct vfs_handle_struct *handle,
342 time_t snapshot)
343 {
344 fstring snaptime_string;
345 ssize_t snaptime_len = 0;
346 char *result = NULL;
347 struct shadow_copy2_config *config;
348 struct shadow_copy2_private *priv;
349
350 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
351 return NULL);
352
353 config = priv->config;
354
355 snaptime_len = shadow_copy2_posix_gmt_string(handle,
356 snapshot,
357 snaptime_string,
358 sizeof(snaptime_string));
359 if (snaptime_len <= 0) {
360 return NULL;
361 }
362
363 if (config->snapdir_absolute) {
364 result = talloc_asprintf(mem_ctx, "%s/%s",
365 config->snapdir, snaptime_string);
366 } else {
367 result = talloc_asprintf(mem_ctx, "/%s/%s",
368 config->snapdir, snaptime_string);
369 }
370 if (result == NULL) {
371 DBG_WARNING("talloc_asprintf failed\n");
372 }
373
374 return result;
375 }
376
377 /**
378 * Build the posix snapshot path for the connection
379 * at the given timestamp, i.e. the absolute posix path
380 * that contains the snapshot for this file system.
381 *
382 * This only applies to classical case, i.e. not
383 * to the "snapdirseverywhere" mode.
384 */
385 static char *shadow_copy2_snapshot_path(TALLOC_CTX *mem_ctx,
386 struct vfs_handle_struct *handle,
387 time_t snapshot)
388 {
389 fstring snaptime_string;
390 ssize_t snaptime_len = 0;
391 char *result = NULL;
392 struct shadow_copy2_private *priv;
393
394 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
395 return NULL);
396
397 snaptime_len = shadow_copy2_posix_gmt_string(handle,
398 snapshot,
399 snaptime_string,
400 sizeof(snaptime_string));
401 if (snaptime_len <= 0) {
402 return NULL;
403 }
404
405 result = talloc_asprintf(mem_ctx, "%s/%s",
406 priv->config->snapshot_basepath, snaptime_string);
407 if (result == NULL) {
408 DBG_WARNING("talloc_asprintf failed\n");
409 }
410
411 return result;
412 }
413
414 static char *make_path_absolute(TALLOC_CTX *mem_ctx,
415 struct shadow_copy2_private *priv,
416 const char *name)
417 {
418 char *newpath = NULL;
419 char *abs_path = NULL;
420
421 if (name[0] != '/') {
422 newpath = talloc_asprintf(mem_ctx,
423 "%s/%s",
424 priv->shadow_cwd,
425 name);
426 if (newpath == NULL) {
427 return NULL;
428 }
429 name = newpath;
430 }
431 abs_path = canonicalize_absolute_path(mem_ctx, name);
432 TALLOC_FREE(newpath);
433 return abs_path;
434 }
435
436 /* Return a $cwd-relative path. */
437 static bool make_relative_path(const char *cwd, char *abs_path)
438 {
439 size_t cwd_len = strlen(cwd);
440 size_t abs_len = strlen(abs_path);
441
442 if (abs_len < cwd_len) {
443 return false;
444 }
445 if (memcmp(abs_path, cwd, cwd_len) != 0) {
446 return false;
447 }
448 /* The cwd_len != 1 case is for $cwd == '/' */
449 if (cwd_len != 1 &&
450 abs_path[cwd_len] != '/' &&
451 abs_path[cwd_len] != '\0')
452 {
453 return false;
454 }
455 if (abs_path[cwd_len] == '/') {
456 cwd_len++;
457 }
458 memmove(abs_path, &abs_path[cwd_len], abs_len + 1 - cwd_len);
459 return true;
460 }
461
462 static bool shadow_copy2_snapshot_to_gmt(vfs_handle_struct *handle,
463 const char *name,
464 char *gmt, size_t gmt_len);
465
466 /*
467 * Check if an incoming filename is already a snapshot converted pathname.
468 *
469 * If so, it returns the pathname truncated at the snapshot point which
470 * will be used as the connectpath.
471 */
472
473 static int check_for_converted_path(TALLOC_CTX *mem_ctx,
474 struct vfs_handle_struct *handle,
475 struct shadow_copy2_private *priv,
476 char *abs_path,
477 bool *ppath_already_converted,
478 char **pconnectpath)
479 {
480 size_t snapdirlen = 0;
481 char *p = strstr_m(abs_path, priv->config->snapdir);
482 char *q = NULL;
483 char *connect_path = NULL;
484 char snapshot[GMT_NAME_LEN+1];
485
486 *ppath_already_converted = false;
487
488 if (p == NULL) {
489 /* Must at least contain shadow:snapdir. */
490 return 0;
491 }
492
493 if (priv->config->snapdir[0] == '/' &&
494 p != abs_path) {
495 /* Absolute shadow:snapdir must be at the start. */
496 return 0;
497 }
498
499 snapdirlen = strlen(priv->config->snapdir);
500 if (p[snapdirlen] != '/') {
501 /* shadow:snapdir must end as a separate component. */
502 return 0;
503 }
504
505 if (p > abs_path && p[-1] != '/') {
506 /* shadow:snapdir must start as a separate component. */
507 return 0;
508 }
509
510 p += snapdirlen;
511 p++; /* Move past the / */
512
513 /*
514 * Need to return up to the next path
515 * component after the time.
516 * This will be used as the connectpath.
517 */
518 q = strchr(p, '/');
519 if (q == NULL) {
520 /*
521 * No next path component.
522 * Use entire string.
523 */
524 connect_path = talloc_strdup(mem_ctx,
525 abs_path);
526 } else {
527 connect_path = talloc_strndup(mem_ctx,
528 abs_path,
529 q - abs_path);
530 }
531 if (connect_path == NULL) {
532 return ENOMEM;
533 }
534
535 /*
536 * Point p at the same offset in connect_path as
537 * it is in abs_path.
538 */
539
540 p = &connect_path[p - abs_path];
541
542 /*
543 * Now ensure there is a time string at p.
544 * The SMB-format @GMT-token string is returned
545 * in snapshot.
546 */
547
548 if (!shadow_copy2_snapshot_to_gmt(handle,
549 p,
550 snapshot,
551 sizeof(snapshot))) {
552 TALLOC_FREE(connect_path);
553 return 0;
554 }
555
556 if (pconnectpath != NULL) {
557 *pconnectpath = connect_path;
558 }
559
560 *ppath_already_converted = true;
561
562 DBG_DEBUG("path |%s| is already converted. "
563 "connect path = |%s|\n",
564 abs_path,
565 connect_path);
566
567 return 0;
568 }
569
570 /**
571 * This function does two things.
572 *
573 * 1). Checks if an incoming filename is already a
574 * snapshot converted pathname.
575 * If so, it returns the pathname truncated
576 * at the snapshot point which will be used
577 * as the connectpath, and then does an early return.
578 *
579 * 2). Checks if an incoming filename contains an
580 * SMB-layer @GMT- style timestamp.
581 * If so, it strips the timestamp, and returns
582 * both the timestamp and the stripped path
583 * (making it cwd-relative).
584 */
585
586 static bool _shadow_copy2_strip_snapshot_internal(TALLOC_CTX *mem_ctx,
587 struct vfs_handle_struct *handle,
588 const struct smb_filename *smb_fname,
589 time_t *ptimestamp,
590 char **pstripped,
591 char **psnappath,
592 bool *_already_converted,
593 const char *function)
594 {
595 char *stripped = NULL;
596 struct shadow_copy2_private *priv;
597 char *abs_path = NULL;
598 bool ret = true;
599 bool already_converted = false;
600 int err = 0;
601
602 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
603 return false);
604
605 DBG_DEBUG("[from %s()] Path '%s'\n",
606 function, smb_fname_str_dbg(smb_fname));
607
608 if (_already_converted != NULL) {
609 *_already_converted = false;
610 }
611
612 abs_path = make_path_absolute(mem_ctx, priv, smb_fname->base_name);
613 if (abs_path == NULL) {
614 ret = false;
615 goto out;
616 }
617
618 DBG_DEBUG("abs path '%s'\n", abs_path);
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 if (_already_converted != NULL) {
634 *_already_converted = true;
635 }
636 goto out;
637 }
638
639 if (smb_fname->twrp == 0) {
640 goto out;
641 }
642
643 if (ptimestamp != NULL) {
644 *ptimestamp = nt_time_to_unix(smb_fname->twrp);
645 }
646
647 if (pstripped != NULL) {
648 stripped = talloc_strdup(mem_ctx, abs_path);
649 if (stripped == NULL) {
650 ret = false;
651 goto out;
652 }
653
654 if (smb_fname->base_name[0] != '/') {
655 ret = make_relative_path(priv->shadow_cwd, stripped);
656 if (!ret) {
657 DBG_DEBUG("Path '%s' "
658 "doesn't start with cwd '%s'\n",
659 stripped, priv->shadow_cwd);
660 ret = false;
661 errno = ENOENT;
662 goto out;
663 }
664 }
665 *pstripped = stripped;
666 }
667
668 ret = true;
669
670 out:
671 TALLOC_FREE(abs_path);
672 return ret;
673 }
674
675 #define shadow_copy2_strip_snapshot_internal(mem_ctx, handle, orig_name, \
676 ptimestamp, pstripped, psnappath, _already_converted) \
677 _shadow_copy2_strip_snapshot_internal((mem_ctx), (handle), (orig_name), \
678 (ptimestamp), (pstripped), (psnappath), (_already_converted), \
679 __FUNCTION__)
680
681 static bool _shadow_copy2_strip_snapshot(TALLOC_CTX *mem_ctx,
682 struct vfs_handle_struct *handle,
683 const struct smb_filename *orig_name,
684 time_t *ptimestamp,
685 char **pstripped,
686 const char *function)
687 {
688 return _shadow_copy2_strip_snapshot_internal(mem_ctx,
689 handle,
690 orig_name,
691 ptimestamp,
692 pstripped,
693 NULL,
694 NULL,
695 function);
696 }
697
698 #define shadow_copy2_strip_snapshot(mem_ctx, handle, orig_name, \
699 ptimestamp, pstripped) \
700 _shadow_copy2_strip_snapshot((mem_ctx), (handle), (orig_name), \
701 (ptimestamp), (pstripped), __FUNCTION__)
702
703 static bool _shadow_copy2_strip_snapshot_converted(TALLOC_CTX *mem_ctx,
704 struct vfs_handle_struct *handle,
705 const struct smb_filename *orig_name,
706 time_t *ptimestamp,
707 char **pstripped,
708 bool *is_converted,
709 const char *function)
710 {
711 return _shadow_copy2_strip_snapshot_internal(mem_ctx,
712 handle,
713 orig_name,
714 ptimestamp,
715 pstripped,
716 NULL,
717 is_converted,
718 function);
719 }
720
721 #define shadow_copy2_strip_snapshot_converted(mem_ctx, handle, orig_name, \
722 ptimestamp, pstripped, is_converted) \
723 _shadow_copy2_strip_snapshot_converted((mem_ctx), (handle), (orig_name), \
724 (ptimestamp), (pstripped), (is_converted), __FUNCTION__)
725
726 static char *shadow_copy2_find_mount_point(TALLOC_CTX *mem_ctx,
727 vfs_handle_struct *handle)
728 {
729 char *path = talloc_strdup(mem_ctx, handle->conn->connectpath);
730 dev_t dev;
731 struct stat st;
732 char *p;
733
734 if (stat(path, &st) != 0) {
735 talloc_free(path);
736 return NULL;
737 }
738
739 dev = st.st_dev;
740
741 while ((p = strrchr(path, '/')) && p > path) {
742 *p = 0;
743 if (stat(path, &st) != 0) {
744 talloc_free(path);
745 return NULL;
746 }
747 if (st.st_dev != dev) {
748 *p = '/';
749 break;
750 }
751 }
752
753 return path;
754 }
755
756 /**
757 * Convert from a name as handed in via the SMB layer
758 * and a timestamp into the local path of the snapshot
759 * of the provided file at the provided time.
760 * Also return the path in the snapshot corresponding
761 * to the file's share root.
762 */
763 static char *shadow_copy2_do_convert(TALLOC_CTX *mem_ctx,
764 struct vfs_handle_struct *handle,
765 const char *name, time_t timestamp,
766 size_t *snaproot_len)
767 {
768 struct smb_filename converted_fname;
769 char *result = NULL;
770 size_t *slashes = NULL;
771 unsigned num_slashes;
772 char *path = NULL;
773 size_t pathlen;
774 char *insert = NULL;
775 char *converted = NULL;
776 size_t insertlen, connectlen = 0;
777 int saved_errno = 0;
778 int i;
779 size_t min_offset;
780 struct shadow_copy2_config *config;
781 struct shadow_copy2_private *priv;
782 size_t in_share_offset = 0;
783
784 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
785 return NULL);
786
787 config = priv->config;
788
789 DEBUG(10, ("converting '%s'\n", name));
790
791 if (!config->snapdirseverywhere) {
792 int ret;
793 char *snapshot_path;
794
795 snapshot_path = shadow_copy2_snapshot_path(talloc_tos(),
796 handle,
797 timestamp);
798 if (snapshot_path == NULL) {
799 goto fail;
800 }
801
802 if (config->rel_connectpath == NULL) {
803 converted = talloc_asprintf(mem_ctx, "%s/%s",
804 snapshot_path, name);
805 } else {
806 converted = talloc_asprintf(mem_ctx, "%s/%s/%s",
807 snapshot_path,
808 config->rel_connectpath,
809 name);
810 }
811 if (converted == NULL) {
812 goto fail;
813 }
814
815 converted_fname = (struct smb_filename) {
816 .base_name = converted,
817 };
818
819 ret = SMB_VFS_NEXT_LSTAT(handle, &converted_fname);
820 DEBUG(10, ("Trying[not snapdirseverywhere] %s: %d (%s)\n",
821 converted,
822 ret, ret == 0 ? "ok" : strerror(errno)));
823 if (ret == 0) {
824 DEBUG(10, ("Found %s\n", converted));
825 result = converted;
826 converted = NULL;
827 if (snaproot_len != NULL) {
828 *snaproot_len = strlen(snapshot_path);
829 if (config->rel_connectpath != NULL) {
830 *snaproot_len +=
831 strlen(config->rel_connectpath) + 1;
832 }
833 }
834 goto fail;
835 } else {
836 errno = ENOENT;
837 goto fail;
838 }
839 /* never reached ... */
840 }
841
842 connectlen = strlen(handle->conn->connectpath);
843 if (name[0] == 0) {
844 path = talloc_strdup(mem_ctx, handle->conn->connectpath);
845 } else {
846 path = talloc_asprintf(
847 mem_ctx, "%s/%s", handle->conn->connectpath, name);
848 }
849 if (path == NULL) {
850 errno = ENOMEM;
851 goto fail;
852 }
853 pathlen = talloc_get_size(path)-1;
854
855 if (!shadow_copy2_find_slashes(talloc_tos(), path,
856 &slashes, &num_slashes)) {
857 goto fail;
858 }
859
860 insert = shadow_copy2_insert_string(talloc_tos(), handle, timestamp);
861 if (insert == NULL) {
862 goto fail;
863 }
864 insertlen = talloc_get_size(insert)-1;
865
866 /*
867 * Note: We deliberately don't expensively initialize the
868 * array with talloc_zero here: Putting zero into
869 * converted[pathlen+insertlen] below is sufficient, because
870 * in the following for loop, the insert string is inserted
871 * at various slash places. So the memory up to position
872 * pathlen+insertlen will always be initialized when the
873 * converted string is used.
874 */
875 converted = talloc_array(mem_ctx, char, pathlen + insertlen + 1);
876 if (converted == NULL) {
877 goto fail;
878 }
879
880 if (path[pathlen-1] != '/') {
881 /*
882 * Append a fake slash to find the snapshot root
883 */
884 size_t *tmp;
885 tmp = talloc_realloc(talloc_tos(), slashes,
886 size_t, num_slashes+1);
887 if (tmp == NULL) {
888 goto fail;
889 }
890 slashes = tmp;
891 slashes[num_slashes] = pathlen;
892 num_slashes += 1;
893 }
894
895 min_offset = 0;
896
897 if (!config->crossmountpoints) {
898 min_offset = strlen(config->mount_point);
899 }
900
901 memcpy(converted, path, pathlen+1);
902 converted[pathlen+insertlen] = '\0';
903
904 converted_fname = (struct smb_filename) {
905 .base_name = converted,
906 };
907
908 for (i = num_slashes-1; i>=0; i--) {
909 int ret;
910 size_t offset;
911
912 offset = slashes[i];
913
914 if (offset < min_offset) {
915 errno = ENOENT;
916 goto fail;
917 }
918
919 if (offset >= connectlen) {
920 in_share_offset = offset;
921 }
922
923 memcpy(converted+offset, insert, insertlen);
924
925 offset += insertlen;
926 memcpy(converted+offset, path + slashes[i],
927 pathlen - slashes[i]);
928
929 ret = SMB_VFS_NEXT_LSTAT(handle, &converted_fname);
930
931 DEBUG(10, ("Trying[snapdirseverywhere] %s: %d (%s)\n",
932 converted,
933 ret, ret == 0 ? "ok" : strerror(errno)));
934 if (ret == 0) {
935 /* success */
936 if (snaproot_len != NULL) {
937 *snaproot_len = in_share_offset + insertlen;
938 }
939 break;
940 }
941 if (errno == ENOTDIR) {
942 /*
943 * This is a valid condition: We appended the
944 * .snapshots/@GMT.. to a file name. Just try
945 * with the upper levels.
946 */
947 continue;
948 }
949 if (errno != ENOENT) {
950 /* Other problem than "not found" */
951 goto fail;
952 }
953 }
954
955 if (i >= 0) {
956 /*
957 * Found something
958 */
959 DEBUG(10, ("Found %s\n", converted));
960 result = converted;
961 converted = NULL;
962 } else {
963 errno = ENOENT;
964 }
965 fail:
966 if (result == NULL) {
967 saved_errno = errno;
968 }
969 TALLOC_FREE(converted);
970 TALLOC_FREE(insert);
971 TALLOC_FREE(slashes);
972 TALLOC_FREE(path);
973 if (saved_errno != 0) {
974 errno = saved_errno;
975 }
976 return result;
977 }
978
979 /**
980 * Convert from a name as handed in via the SMB layer
981 * and a timestamp into the local path of the snapshot
982 * of the provided file at the provided time.
983 */
984 static char *shadow_copy2_convert(TALLOC_CTX *mem_ctx,
985 struct vfs_handle_struct *handle,
986 const char *name, time_t timestamp)
987 {
988 return shadow_copy2_do_convert(mem_ctx, handle, name, timestamp, NULL);
989 }
990
991 /*
992 modify a sbuf return to ensure that inodes in the shadow directory
993 are different from those in the main directory
994 */
995 static void convert_sbuf(vfs_handle_struct *handle, const char *fname,
996 SMB_STRUCT_STAT *sbuf)
997 {
998 struct shadow_copy2_private *priv;
999
1000 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1001 return);
1002
1003 if (priv->config->fixinodes) {
1004 /* some snapshot systems, like GPFS, return the same
1005 device:inode for the snapshot files as the current
1006 files. That breaks the 'restore' button in the shadow copy
1007 GUI, as the client gets a sharing violation.
1008
1009 This is a crude way of allowing both files to be
1010 open at once. It has a slight chance of inode
1011 number collision, but I can't see a better approach
1012 without significant VFS changes
1013 */
1014 TDB_DATA key = { .dptr = discard_const_p(uint8_t, fname),
1015 .dsize = strlen(fname) };
1016 uint32_t shash;
1017
1018 shash = tdb_jenkins_hash(&key) & 0xFF000000;
1019 if (shash == 0) {
1020 shash = 1;
1021 }
1022 sbuf->st_ex_ino ^= shash;
1023 }
1024 }
1025
1026 static int shadow_copy2_renameat(vfs_handle_struct *handle,
1027 files_struct *srcfsp,
1028 const struct smb_filename *smb_fname_src,
1029 files_struct *dstfsp,
1030 const struct smb_filename *smb_fname_dst)
1031 {
1032 time_t timestamp_src = 0;
1033 time_t timestamp_dst = 0;
1034 char *snappath_src = NULL;
1035 char *snappath_dst = NULL;
1036
1037 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(), handle,
1038 smb_fname_src,
1039 &timestamp_src, NULL, &snappath_src,
1040 NULL)) {
1041 return -1;
1042 }
1043 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(), handle,
1044 smb_fname_dst,
1045 &timestamp_dst, NULL, &snappath_dst,
1046 NULL)) {
1047 return -1;
1048 }
1049 if (timestamp_src != 0) {
1050 errno = EXDEV;
1051 return -1;
1052 }
1053 if (timestamp_dst != 0) {
1054 errno = EROFS;
1055 return -1;
1056 }
1057 /*
1058 * Don't allow rename on already converted paths.
1059 */
1060 if (snappath_src != NULL) {
1061 errno = EXDEV;
1062 return -1;
1063 }
1064 if (snappath_dst != NULL) {
1065 errno = EROFS;
1066 return -1;
1067 }
1068 return SMB_VFS_NEXT_RENAMEAT(handle,
1069 srcfsp,
1070 smb_fname_src,
1071 dstfsp,
1072 smb_fname_dst);
1073 }
1074
1075 static int shadow_copy2_symlinkat(vfs_handle_struct *handle,
1076 const struct smb_filename *link_contents,
1077 struct files_struct *dirfsp,
1078 const struct smb_filename *new_smb_fname)
1079 {
1080 time_t timestamp_old = 0;
1081 time_t timestamp_new = 0;
1082 char *snappath_old = NULL;
1083 char *snappath_new = NULL;
1084
1085 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1086 handle,
1087 link_contents,
1088 &timestamp_old,
1089 NULL,
1090 &snappath_old,
1091 NULL)) {
1092 return -1;
1093 }
1094 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1095 handle,
1096 new_smb_fname,
1097 &timestamp_new,
1098 NULL,
1099 &snappath_new,
1100 NULL)) {
1101 return -1;
1102 }
1103 if ((timestamp_old != 0) || (timestamp_new != 0)) {
1104 errno = EROFS;
1105 return -1;
1106 }
1107 /*
1108 * Don't allow symlinks on already converted paths.
1109 */
1110 if ((snappath_old != NULL) || (snappath_new != NULL)) {
1111 errno = EROFS;
1112 return -1;
1113 }
1114 return SMB_VFS_NEXT_SYMLINKAT(handle,
1115 link_contents,
1116 dirfsp,
1117 new_smb_fname);
1118 }
1119
1120 static int shadow_copy2_linkat(vfs_handle_struct *handle,
1121 files_struct *srcfsp,
1122 const struct smb_filename *old_smb_fname,
1123 files_struct *dstfsp,
1124 const struct smb_filename *new_smb_fname,
1125 int flags)
1126 {
1127 time_t timestamp_old = 0;
1128 time_t timestamp_new = 0;
1129 char *snappath_old = NULL;
1130 char *snappath_new = NULL;
1131
1132 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1133 handle,
1134 old_smb_fname,
1135 &timestamp_old,
1136 NULL,
1137 &snappath_old,
1138 NULL)) {
1139 return -1;
1140 }
1141 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1142 handle,
1143 new_smb_fname,
1144 &timestamp_new,
1145 NULL,
1146 &snappath_new,
1147 NULL)) {
1148 return -1;
1149 }
1150 if ((timestamp_old != 0) || (timestamp_new != 0)) {
1151 errno = EROFS;
1152 return -1;
1153 }
1154 /*
1155 * Don't allow links on already converted paths.
1156 */
1157 if ((snappath_old != NULL) || (snappath_new != NULL)) {
1158 errno = EROFS;
1159 return -1;
1160 }
1161 return SMB_VFS_NEXT_LINKAT(handle,
1162 srcfsp,
1163 old_smb_fname,
1164 dstfsp,
1165 new_smb_fname,
1166 flags);
1167 }
1168
1169 static int shadow_copy2_stat(vfs_handle_struct *handle,
1170 struct smb_filename *smb_fname)
1171 {
1172 struct shadow_copy2_private *priv = NULL;
1173 time_t timestamp = 0;
1174 char *stripped = NULL;
1175 bool converted = false;
1176 char *abspath = NULL;
1177 char *tmp;
1178 int ret = 0;
1179
1180 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1181 return -1);
1182
1183 if (!shadow_copy2_strip_snapshot_converted(talloc_tos(),
1184 handle,
1185 smb_fname,
1186 &timestamp,
1187 &stripped,
1188 &converted)) {
1189 return -1;
1190 }
1191 if (timestamp == 0) {
1192 TALLOC_FREE(stripped);
1193 ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
1194 if (ret != 0) {
1195 return ret;
1196 }
1197 if (!converted) {
1198 return 0;
1199 }
1200
1201 abspath = make_path_absolute(talloc_tos(),
1202 priv,
1203 smb_fname->base_name);
1204 if (abspath == NULL) {
1205 return -1;
1206 }
1207
1208 convert_sbuf(handle, abspath, &smb_fname->st);
1209 TALLOC_FREE(abspath);
1210 return 0;
1211 }
1212
1213 tmp = smb_fname->base_name;
1214 smb_fname->base_name = shadow_copy2_convert(
1215 talloc_tos(), handle, stripped, timestamp);
1216 TALLOC_FREE(stripped);
1217
1218 if (smb_fname->base_name == NULL) {
1219 smb_fname->base_name = tmp;
1220 return -1;
1221 }
1222
1223 ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
1224 if (ret != 0) {
1225 goto out;
1226 }
1227
1228 abspath = make_path_absolute(talloc_tos(),
1229 priv,
1230 smb_fname->base_name);
1231 if (abspath == NULL) {
1232 ret = -1;
1233 goto out;
1234 }
1235
1236 convert_sbuf(handle, abspath, &smb_fname->st);
1237 TALLOC_FREE(abspath);
1238
1239 out:
1240 TALLOC_FREE(smb_fname->base_name);
1241 smb_fname->base_name = tmp;
1242
1243 return ret;
1244 }
1245
1246 static int shadow_copy2_lstat(vfs_handle_struct *handle,
1247 struct smb_filename *smb_fname)
1248 {
1249 struct shadow_copy2_private *priv = NULL;
1250 time_t timestamp = 0;
1251 char *stripped = NULL;
1252 bool converted = false;
1253 char *abspath = NULL;
1254 char *tmp;
1255 int ret = 0;
1256
1257 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1258 return -1);
1259
1260 if (!shadow_copy2_strip_snapshot_converted(talloc_tos(),
1261 handle,
1262 smb_fname,
1263 &timestamp,
1264 &stripped,
1265 &converted)) {
1266 return -1;
1267 }
1268 if (timestamp == 0) {
1269 TALLOC_FREE(stripped);
1270 ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
1271 if (ret != 0) {
1272 return ret;
1273 }
1274 if (!converted) {
1275 return 0;
1276 }
1277
1278 abspath = make_path_absolute(talloc_tos(),
1279 priv,
1280 smb_fname->base_name);
1281 if (abspath == NULL) {
1282 return -1;
1283 }
1284
1285 convert_sbuf(handle, abspath, &smb_fname->st);
1286 TALLOC_FREE(abspath);
1287 return 0;
1288 }
1289
1290 tmp = smb_fname->base_name;
1291 smb_fname->base_name = shadow_copy2_convert(
1292 talloc_tos(), handle, stripped, timestamp);
1293 TALLOC_FREE(stripped);
1294
1295 if (smb_fname->base_name == NULL) {
1296 smb_fname->base_name = tmp;
1297 return -1;
1298 }
1299
1300 ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
1301 if (ret != 0) {
1302 goto out;
1303 }
1304
1305 abspath = make_path_absolute(talloc_tos(),
1306 priv,
1307 smb_fname->base_name);
1308 if (abspath == NULL) {
1309 ret = -1;
1310 goto out;
1311 }
1312
1313 convert_sbuf(handle, abspath, &smb_fname->st);
1314 TALLOC_FREE(abspath);
1315
1316 out:
1317 TALLOC_FREE(smb_fname->base_name);
1318 smb_fname->base_name = tmp;
1319
1320 return ret;
1321 }
1322
1323 static int shadow_copy2_fstat(vfs_handle_struct *handle, files_struct *fsp,
1324 SMB_STRUCT_STAT *sbuf)
1325 {
1326 struct shadow_copy2_private *priv = NULL;
1327 time_t timestamp = 0;
1328 struct smb_filename *orig_smb_fname = NULL;
1329 struct smb_filename vss_smb_fname;
1330 struct smb_filename *orig_base_smb_fname = NULL;
1331 struct smb_filename vss_base_smb_fname;
1332 char *stripped = NULL;
1333 char *abspath = NULL;
1334 bool converted = false;
1335 bool ok;
1336 int ret;
1337
1338 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1339 return -1);
1340
1341 ok = shadow_copy2_strip_snapshot_converted(talloc_tos(),
1342 handle,
1343 fsp->fsp_name,
1344 &timestamp,
1345 &stripped,
1346 &converted);
1347 if (!ok) {
1348 return -1;
1349 }
1350
1351 if (timestamp == 0) {
1352 TALLOC_FREE(stripped);
1353 ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
1354 if (ret != 0) {
1355 return ret;
1356 }
1357 if (!converted) {
1358 return 0;
1359 }
1360
1361 abspath = make_path_absolute(talloc_tos(),
1362 priv,
1363 fsp->fsp_name->base_name);
1364 if (abspath == NULL) {
1365 return -1;
1366 }
1367
1368 convert_sbuf(handle, abspath, sbuf);
1369 TALLOC_FREE(abspath);
1370 return 0;
1371 }
1372
1373 vss_smb_fname = *fsp->fsp_name;
1374 vss_smb_fname.base_name = shadow_copy2_convert(talloc_tos(),
1375 handle,
1376 stripped,
1377 timestamp);
1378 TALLOC_FREE(stripped);
1379 if (vss_smb_fname.base_name == NULL) {
1380 return -1;
1381 }
1382
1383 orig_smb_fname = fsp->fsp_name;
1384 fsp->fsp_name = &vss_smb_fname;
1385
1386 if (fsp_is_alternate_stream(fsp)) {
1387 vss_base_smb_fname = *fsp->base_fsp->fsp_name;
1388 vss_base_smb_fname.base_name = vss_smb_fname.base_name;
1389 orig_base_smb_fname = fsp->base_fsp->fsp_name;
1390 fsp->base_fsp->fsp_name = &vss_base_smb_fname;
1391 }
1392
1393 ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
1394 if (ret != 0) {
1395 goto out;
1396 }
1397
1398 abspath = make_path_absolute(talloc_tos(),
1399 priv,
1400 fsp->fsp_name->base_name);
1401 if (abspath == NULL) {
1402 ret = -1;
1403 goto out;
1404 }
1405
1406 convert_sbuf(handle, abspath, sbuf);
1407 TALLOC_FREE(abspath);
1408
1409 out:
1410 fsp->fsp_name = orig_smb_fname;
1411 if (fsp_is_alternate_stream(fsp)) {
1412 fsp->base_fsp->fsp_name = orig_base_smb_fname;
1413 }
1414
1415 return ret;
1416 }
1417
1418 static int shadow_copy2_fstatat(
1419 struct vfs_handle_struct *handle,
1420 const struct files_struct *dirfsp,
1421 const struct smb_filename *smb_fname_in,
1422 SMB_STRUCT_STAT *sbuf,
1423 int flags)
1424 {
1425 struct shadow_copy2_private *priv = NULL;
1426 struct smb_filename *smb_fname = NULL;
1427 time_t timestamp = 0;
1428 char *stripped = NULL;
1429 char *abspath = NULL;
1430 bool converted = false;
1431 int ret;
1432 bool ok;
1433
1434 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1435 return -1);
1436
1437 smb_fname = full_path_from_dirfsp_atname(talloc_tos(),
1438 dirfsp,
1439 smb_fname_in);
1440 if (smb_fname == NULL) {
1441 errno = ENOMEM;
1442 return -1;
1443 }
1444
1445 ok = shadow_copy2_strip_snapshot_converted(talloc_tos(),
1446 handle,
1447 smb_fname,
1448 &timestamp,
1449 &stripped,
1450 &converted);
1451 if (!ok) {
1452 return -1;
1453 }
1454 if (timestamp == 0) {
1455 TALLOC_FREE(stripped);
1456 ret = SMB_VFS_NEXT_FSTATAT(
1457 handle, dirfsp, smb_fname_in, sbuf, flags);
1458 if (ret != 0) {
1459 return ret;
1460 }
1461 if (!converted) {
1462 return 0;
1463 }
1464
1465 abspath = make_path_absolute(
1466 talloc_tos(), priv, smb_fname->base_name);
1467 if (abspath == NULL) {
1468 errno = ENOMEM;
1469 return -1;
1470 }
1471
1472 convert_sbuf(handle, abspath, sbuf);
1473 TALLOC_FREE(abspath);
1474 return 0;
1475 }
1476
1477 smb_fname->base_name = shadow_copy2_convert(
1478 smb_fname, handle, stripped, timestamp);
1479 TALLOC_FREE(stripped);
1480 if (smb_fname->base_name == NULL) {
1481 TALLOC_FREE(smb_fname);
1482 errno = ENOMEM;
1483 return -1;
1484 }
1485
1486 ret = SMB_VFS_NEXT_FSTATAT(handle,
1487 dirfsp,
1488 smb_fname,
1489 sbuf,
1490 flags);
1491 if (ret != 0) {
1492 int saved_errno = errno;
1493 TALLOC_FREE(smb_fname);
1494 errno = saved_errno;
1495 return -1;
1496 }
1497
1498 abspath = make_path_absolute(
1499 talloc_tos(), priv, smb_fname->base_name);
1500 if (abspath == NULL) {
1501 TALLOC_FREE(smb_fname);
1502 errno = ENOMEM;
1503 return -1;
1504 }
1505
1506 convert_sbuf(handle, abspath, sbuf);
1507 TALLOC_FREE(abspath);
1508
1509 TALLOC_FREE(smb_fname);
1510
1511 return 0;
1512 }
1513
1514 static struct smb_filename *shadow_copy2_openat_name(
1515 TALLOC_CTX *mem_ctx,
1516 const struct files_struct *dirfsp,
1517 const struct files_struct *fsp,
1518 const struct smb_filename *smb_fname_in)
1519 {
1520 struct smb_filename *result = NULL;
1521
1522 if (fsp->base_fsp != NULL) {
1523 struct smb_filename *base_fname = fsp->base_fsp->fsp_name;
1524
1525 if (smb_fname_in->base_name[0] == '/') {
1526 /*
1527 * Special-case stream names from streams_depot
1528 */
1529 result = cp_smb_filename(mem_ctx, smb_fname_in);
1530 } else {
1531
1532 SMB_ASSERT(is_named_stream(smb_fname_in));
1533
1534 result = synthetic_smb_fname(mem_ctx,
1535 base_fname->base_name,
1536 smb_fname_in->stream_name,
1537 &smb_fname_in->st,
1538 smb_fname_in->twrp,
1539 smb_fname_in->flags);
1540 }
1541 } else {
1542 result = full_path_from_dirfsp_atname(
1543 mem_ctx, dirfsp, smb_fname_in);
1544 }
1545
1546 return result;
1547 }
1548
1549 static int shadow_copy2_openat(vfs_handle_struct *handle,
1550 const struct files_struct *dirfsp,
1551 const struct smb_filename *smb_fname_in,
1552 struct files_struct *fsp,
1553 const struct vfs_open_how *_how)
1554 {
1555 struct vfs_open_how how = *_how;
1556 struct smb_filename *smb_fname = NULL;
1557 time_t timestamp = 0;
1558 char *stripped = NULL;
1559 int saved_errno = 0;
1560 int ret;
1561 bool ok;
1562
1563 if (how.resolve != 0) {
1564 errno = ENOSYS;
1565 return -1;
1566 }
1567
1568 smb_fname = shadow_copy2_openat_name(
1569 talloc_tos(), dirfsp, fsp, smb_fname_in);
1570 if (smb_fname == NULL) {
1571 errno = ENOMEM;
1572 return -1;
1573 }
1574
1575 ok = shadow_copy2_strip_snapshot(talloc_tos(),
1576 handle,
1577 smb_fname,
1578 &timestamp,
1579 &stripped);
1580 if (!ok) {
1581 TALLOC_FREE(smb_fname);
1582 return -1;
1583 }
1584 if (timestamp == 0) {
1585 TALLOC_FREE(stripped);
1586 TALLOC_FREE(smb_fname);
1587 return SMB_VFS_NEXT_OPENAT(handle,
1588 dirfsp,
1589 smb_fname_in,
1590 fsp,
1591 &how);
1592 }
1593
1594 smb_fname->base_name = shadow_copy2_convert(smb_fname,
1595 handle,
1596 stripped,
1597 timestamp);
1598 if (smb_fname->base_name == NULL) {
1599 int err = errno;
1600 TALLOC_FREE(stripped);
1601 TALLOC_FREE(smb_fname);
1602 errno = err;
1603 return -1;
1604 }
1605 TALLOC_FREE(stripped);
1606
1607 ret = SMB_VFS_NEXT_OPENAT(handle,
1608 dirfsp,
1609 smb_fname,
1610 fsp,
1611 &how);
1612 if (ret == -1) {
1613 saved_errno = errno;
1614 }
1615
1616 TALLOC_FREE(smb_fname);
1617
1618 if (saved_errno != 0) {
1619 errno = saved_errno;
1620 }
1621 return ret;
1622 }
1623
1624 static int shadow_copy2_unlinkat(vfs_handle_struct *handle,
1625 struct files_struct *dirfsp,
1626 const struct smb_filename *smb_fname,
1627 int flags)
1628 {
1629 time_t timestamp = 0;
1630
1631 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1632 smb_fname,
1633 &timestamp, NULL)) {
1634 return -1;
1635 }
1636 if (timestamp != 0) {
1637 errno = EROFS;
1638 return -1;
1639 }
1640 return SMB_VFS_NEXT_UNLINKAT(handle,
1641 dirfsp,
1642 smb_fname,
1643 flags);
1644 }
1645
1646 static int shadow_copy2_fchmod(vfs_handle_struct *handle,
1647 struct files_struct *fsp,
1648 mode_t mode)
1649 {
1650 time_t timestamp = 0;
1651 const struct smb_filename *smb_fname = NULL;
1652
1653 smb_fname = fsp->fsp_name;
1654 if (!shadow_copy2_strip_snapshot(talloc_tos(),
1655 handle,
1656 smb_fname,
1657 &timestamp,
1658 NULL)) {
1659 return -1;
1660 }
1661 if (timestamp != 0) {
1662 errno = EROFS;
1663 return -1;
1664 }
1665 return SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
1666 }
1667
1668 static void store_cwd_data(vfs_handle_struct *handle,
1669 const char *connectpath)
1670 {
1671 struct shadow_copy2_private *priv = NULL;
1672 struct smb_filename *cwd_fname = NULL;
1673
1674 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1675 return);
1676
1677 TALLOC_FREE(priv->shadow_cwd);
1678 cwd_fname = SMB_VFS_NEXT_GETWD(handle, talloc_tos());
1679 if (cwd_fname == NULL) {
1680 smb_panic("getwd failed\n");
1681 }
1682 DBG_DEBUG("shadow cwd = %s\n", cwd_fname->base_name);
1683 priv->shadow_cwd = talloc_strdup(priv, cwd_fname->base_name);
1684 TALLOC_FREE(cwd_fname);
1685 if (priv->shadow_cwd == NULL) {
1686 smb_panic("talloc failed\n");
1687 }
1688 TALLOC_FREE(priv->shadow_connectpath);
1689 if (connectpath) {
1690 DBG_DEBUG("shadow connectpath = %s\n", connectpath);
1691 priv->shadow_connectpath = talloc_strdup(priv, connectpath);
1692 if (priv->shadow_connectpath == NULL) {
1693 smb_panic("talloc failed\n");
1694 }
1695 }
1696 }
1697
1698 static int shadow_copy2_chdir(vfs_handle_struct *handle,
1699 const struct smb_filename *smb_fname)
1700 {
1701 time_t timestamp = 0;
1702 char *stripped = NULL;
1703 char *snappath = NULL;
1704 int ret = -1;
1705 int saved_errno = 0;
1706 char *conv = NULL;
1707 size_t rootpath_len = 0;
1708 struct smb_filename *conv_smb_fname = NULL;
1709
1710 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1711 handle,
1712 smb_fname,
1713 &timestamp,
1714 &stripped,
1715 &snappath,
1716 NULL)) {
1717 return -1;
1718 }
1719 if (stripped != NULL) {
1720 conv = shadow_copy2_do_convert(talloc_tos(),
1721 handle,
1722 stripped,
1723 timestamp,
1724 &rootpath_len);
1725 TALLOC_FREE(stripped);
1726 if (conv == NULL) {
1727 return -1;
1728 }
1729 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
1730 conv,
1731 NULL,
1732 NULL,
1733 0,
1734 smb_fname->flags);
1735 } else {
1736 conv_smb_fname = cp_smb_filename(talloc_tos(), smb_fname);
1737 }
1738
1739 if (conv_smb_fname == NULL) {
1740 TALLOC_FREE(conv);
1741 errno = ENOMEM;
1742 return -1;
1743 }
1744
1745 ret = SMB_VFS_NEXT_CHDIR(handle, conv_smb_fname);
1746 if (ret == -1) {
1747 saved_errno = errno;
1748 }
1749
1750 if (ret == 0) {
1751 if (conv != NULL && rootpath_len != 0) {
1752 conv[rootpath_len] = '\0';
1753 } else if (snappath != 0) {
1754 TALLOC_FREE(conv);
1755 conv = snappath;
1756 }
1757 store_cwd_data(handle, conv);
1758 }
1759
1760 TALLOC_FREE(stripped);
1761 TALLOC_FREE(conv);
1762 TALLOC_FREE(conv_smb_fname);
1763
1764 if (saved_errno != 0) {
1765 errno = saved_errno;
1766 }
1767 return ret;
1768 }
1769
1770 static int shadow_copy2_fntimes(vfs_handle_struct *handle,
1771 files_struct *fsp,
1772 struct smb_file_time *ft)
1773 {
1774 time_t timestamp = 0;
1775
1776 if (!shadow_copy2_strip_snapshot(talloc_tos(),
1777 handle,
1778 fsp->fsp_name,
1779 &timestamp,
1780 NULL)) {
1781 return -1;
1782 }
1783 if (timestamp != 0) {
1784 errno = EROFS;
1785 return -1;
1786 }
1787 return SMB_VFS_NEXT_FNTIMES(handle, fsp, ft);
1788 }
1789
1790 static int shadow_copy2_readlinkat(vfs_handle_struct *handle,
1791 const struct files_struct *dirfsp,
1792 const struct smb_filename *smb_fname,
1793 char *buf,
1794 size_t bufsiz)
1795 {
1796 time_t timestamp = 0;
1797 char *stripped = NULL;
1798 int saved_errno = 0;
1799 int ret;
1800 struct smb_filename *full_fname = NULL;
1801 struct smb_filename *conv = NULL;
1802
1803 full_fname = full_path_from_dirfsp_atname(talloc_tos(),
1804 dirfsp,
1805 smb_fname);
1806 if (full_fname == NULL) {
1807 errno = ENOMEM;
1808 return -1;
1809 }
1810
1811 if (!shadow_copy2_strip_snapshot(talloc_tos(),
1812 handle,
1813 full_fname,
1814 &timestamp,
1815 &stripped)) {
1816 TALLOC_FREE(full_fname);
1817 return -1;
1818 }
1819
1820 if (timestamp == 0) {
1821 TALLOC_FREE(full_fname);
1822 TALLOC_FREE(stripped);
1823 return SMB_VFS_NEXT_READLINKAT(handle,
1824 dirfsp,
1825 smb_fname,
1826 buf,
1827 bufsiz);
1828 }
1829 conv = cp_smb_filename(talloc_tos(), full_fname);
1830 if (conv == NULL) {
1831 TALLOC_FREE(full_fname);
1832 TALLOC_FREE(stripped);
1833 errno = ENOMEM;
1834 return -1;
1835 }
1836 TALLOC_FREE(full_fname);
1837 conv->base_name = shadow_copy2_convert(
1838 conv, handle, stripped, timestamp);
1839 TALLOC_FREE(stripped);
1840 if (conv->base_name == NULL) {
1841 return -1;
1842 }
1843 ret = SMB_VFS_NEXT_READLINKAT(handle,
1844 handle->conn->cwd_fsp,
1845 conv,
1846 buf,
1847 bufsiz);
1848 if (ret == -1) {
1849 saved_errno = errno;
1850 }
1851 TALLOC_FREE(conv);
1852 if (saved_errno != 0) {
1853 errno = saved_errno;
1854 }
1855 return ret;
1856 }
1857
1858 static int shadow_copy2_mknodat(vfs_handle_struct *handle,
1859 files_struct *dirfsp,
1860 const struct smb_filename *smb_fname,
1861 mode_t mode,
1862 SMB_DEV_T dev)
1863 {
1864 time_t timestamp = 0;
1865
1866 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1867 smb_fname,
1868 &timestamp, NULL)) {
1869 return -1;
1870 }
1871 if (timestamp != 0) {
1872 errno = EROFS;
1873 return -1;
1874 }
1875 return SMB_VFS_NEXT_MKNODAT(handle,
1876 dirfsp,
1877 smb_fname,
1878 mode,
1879 dev);
1880 }
1881
1882 static struct smb_filename *shadow_copy2_realpath(vfs_handle_struct *handle,
1883 TALLOC_CTX *ctx,
1884 const struct smb_filename *smb_fname)
1885 {
1886 time_t timestamp = 0;
1887 char *stripped = NULL;
1888 struct smb_filename *result_fname = NULL;
1889 struct smb_filename *conv_fname = NULL;
1890 int saved_errno = 0;
1891
1892 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1893 smb_fname,
1894 &timestamp, &stripped)) {
1895 goto done;
1896 }
1897 if (timestamp == 0) {
1898 return SMB_VFS_NEXT_REALPATH(handle, ctx, smb_fname);
1899 }
1900
1901 conv_fname = cp_smb_filename(talloc_tos(), smb_fname);
1902 if (conv_fname == NULL) {
1903 goto done;
1904 }
1905 conv_fname->base_name = shadow_copy2_convert(
1906 conv_fname, handle, stripped, timestamp);
1907 if (conv_fname->base_name == NULL) {
1908 goto done;
1909 }
1910
1911 result_fname = SMB_VFS_NEXT_REALPATH(handle, ctx, conv_fname);
1912
1913 done:
1914 if (result_fname == NULL) {
1915 saved_errno = errno;
1916 }
1917 TALLOC_FREE(conv_fname);
1918 TALLOC_FREE(stripped);
1919 if (saved_errno != 0) {
1920 errno = saved_errno;
1921 }
1922 return result_fname;
1923 }
1924
1925 /**
1926 * Check whether a given directory contains a
1927 * snapshot directory as direct subdirectory.
1928 * If yes, return the path of the snapshot-subdir,
1929 * otherwise return NULL.
1930 */
1931 static char *have_snapdir(struct vfs_handle_struct *handle,
1932 TALLOC_CTX *mem_ctx,
1933 const char *path)
1934 {
1935 struct smb_filename smb_fname;
1936 int ret;
1937 struct shadow_copy2_private *priv;
1938
1939 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1940 return NULL);
1941
1942 smb_fname = (struct smb_filename) {
1943 .base_name = talloc_asprintf(
1944 mem_ctx, "%s/%s", path, priv->config->snapdir),
1945 };
1946 if (smb_fname.base_name == NULL) {
1947 return NULL;
1948 }
1949
1950 ret = SMB_VFS_NEXT_STAT(handle, &smb_fname);
1951 if ((ret == 0) && (S_ISDIR(smb_fname.st.st_ex_mode))) {
1952 return smb_fname.base_name;
1953 }
1954 TALLOC_FREE(smb_fname.base_name);
1955 return NULL;
1956 }
1957
1958 /**
1959 * Find the snapshot directory (if any) for the given
1960 * filename (which is relative to the share).
1961 */
1962 static const char *shadow_copy2_find_snapdir(TALLOC_CTX *mem_ctx,
1963 struct vfs_handle_struct *handle,
1964 struct smb_filename *smb_fname)
1965 {
1966 char *path, *p;
1967 const char *snapdir;
1968 struct shadow_copy2_config *config;
1969 struct shadow_copy2_private *priv;
1970
1971 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1972 return NULL);
1973
1974 config = priv->config;
1975
1976 /*
1977 * If the non-snapdirseverywhere mode, we should not search!
1978 */
1979 if (!config->snapdirseverywhere) {
1980 return config->snapshot_basepath;
1981 }
1982
1983 path = talloc_asprintf(mem_ctx, "%s/%s",
1984 handle->conn->connectpath,
1985 smb_fname->base_name);
1986 if (path == NULL) {
1987 return NULL;
1988 }
1989
1990 snapdir = have_snapdir(handle, talloc_tos(), path);
1991 if (snapdir != NULL) {
1992 TALLOC_FREE(path);
1993 return snapdir;
1994 }
1995
1996 while ((p = strrchr(path, '/')) && (p > path)) {
1997
1998 p[0] = '\0';
1999
2000 snapdir = have_snapdir(handle, talloc_tos(), path);
2001 if (snapdir != NULL) {
2002 TALLOC_FREE(path);
2003 return snapdir;
2004 }
2005 }
2006 TALLOC_FREE(path);
2007 return NULL;
2008 }
2009
2010 static bool shadow_copy2_snapshot_to_gmt(vfs_handle_struct *handle,
2011 const char *name,
2012 char *gmt, size_t gmt_len)
2013 {
2014 struct tm timestamp = { .tm_sec = 0, };
2015 time_t timestamp_t;
2016 unsigned long int timestamp_long;
2017 const char *fmt;
2018 struct shadow_copy2_config *config;
2019 struct shadow_copy2_private *priv;
2020 char *tmpstr = NULL;
2021 char *tmp = NULL;
2022 bool converted = false;
2023 int ret = -1;
2024
2025 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2026 return NULL);
2027
2028 config = priv->config;
2029
2030 fmt = config->gmt_format;
2031
2032 /*
2033 * If regex is provided, then we will have to parse the
2034 * filename which will contain both the prefix and the time format.
2035 * e.g. <prefix><delimiter><time_format>
2036 */
2037 if (priv->snaps->regex != NULL) {
2038 tmpstr = talloc_strdup(talloc_tos(), name);
2039 /* point "name" to the time format */
2040 name = strstr(name, priv->config->delimiter);
2041 if (name == NULL) {
2042 goto done;
2043 }
2044 /* Extract the prefix */
2045 tmp = strstr(tmpstr, priv->config->delimiter);
2046 if (tmp == NULL) {
2047 goto done;
2048 }
2049 *tmp = '\0';
2050
2051 /* Parse regex */
2052 ret = regexec(priv->snaps->regex, tmpstr, 0, NULL, 0);
2053 if (ret) {
2054 DBG_DEBUG("shadow_copy2_snapshot_to_gmt: "
2055 "no regex match for %s\n", tmpstr);
2056 goto done;
2057 }
2058 }
2059
2060 if (config->use_sscanf) {
2061 if (sscanf(name, fmt, &timestamp_long) != 1) {
2062 DEBUG(10, ("shadow_copy2_snapshot_to_gmt: "
2063 "no sscanf match %s: %s\n",
2064 fmt, name));
2065 goto done;
2066 }
2067 timestamp_t = timestamp_long;
2068 gmtime_r(&timestamp_t, &timestamp);
2069 } else {
2070 if (strptime(name, fmt, &timestamp) == NULL) {
2071 DEBUG(10, ("shadow_copy2_snapshot_to_gmt: "
2072 "no match %s: %s\n",
2073 fmt, name));
2074 goto done;
2075 }
2076 DEBUG(10, ("shadow_copy2_snapshot_to_gmt: match %s: %s\n",
2077 fmt, name));
2078
2079 if (config->use_localtime) {
2080 timestamp.tm_isdst = -1;
2081 timestamp_t = mktime(&timestamp);
2082 gmtime_r(&timestamp_t, &timestamp);
2083 }
2084 }
2085
2086 strftime(gmt, gmt_len, GMT_FORMAT, &timestamp);
2087 converted = true;
2088
2089 done:
2090 TALLOC_FREE(tmpstr);
2091 return converted;
2092 }
2093
2094 static int shadow_copy2_label_cmp_asc(const void *x, const void *y)
2095 {
2096 return strncmp((const char *)x, (const char *)y, sizeof(SHADOW_COPY_LABEL));
2097 }
2098
2099 static int shadow_copy2_label_cmp_desc(const void *x, const void *y)
2100 {
2101 return -strncmp((const char *)x, (const char *)y, sizeof(SHADOW_COPY_LABEL));
2102 }
2103
2104 /*
2105 sort the shadow copy data in ascending or descending order
2106 */
2107 static void shadow_copy2_sort_data(vfs_handle_struct *handle,
2108 struct shadow_copy_data *shadow_copy2_data)
2109 {
2110 int (*cmpfunc)(const void *, const void *);
2111 const char *sort;
2112 struct shadow_copy2_private *priv;
2113
2114 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2115 return);
2116
2117 sort = priv->config->sort_order;
2118 if (sort == NULL) {
2119 return;
2120 }
2121
2122 if (strcmp(sort, "asc") == 0) {
2123 cmpfunc = shadow_copy2_label_cmp_asc;
2124 } else if (strcmp(sort, "desc") == 0) {
2125 cmpfunc = shadow_copy2_label_cmp_desc;
2126 } else {
2127 return;
2128 }
2129
2130 if (shadow_copy2_data && shadow_copy2_data->num_volumes > 0 &&
2131 shadow_copy2_data->labels)
2132 {
2133 TYPESAFE_QSORT(shadow_copy2_data->labels,
2134 shadow_copy2_data->num_volumes,
2135 cmpfunc);
2136 }
2137 }
2138
2139 static int shadow_copy2_get_shadow_copy_data(
2140 vfs_handle_struct *handle, files_struct *fsp,
2141 struct shadow_copy_data *shadow_copy2_data,
2142 bool labels)
2143 {
2144 DIR *p = NULL;
2145 const char *snapdir;
2146 struct smb_filename *snapdir_smb_fname = NULL;
2147 struct files_struct *dirfsp = NULL;
2148 struct files_struct *fspcwd = NULL;
2149 struct dirent *d;
2150 TALLOC_CTX *tmp_ctx = talloc_stackframe();
2151 struct shadow_copy2_private *priv = NULL;
2152 struct shadow_copy2_snapentry *tmpentry = NULL;
2153 bool get_snaplist = false;
2154 struct vfs_open_how how = {
2155 .flags = O_RDONLY, .mode = 0,
2156 };
2157 int fd;
2158 int ret = -1;
2159 NTSTATUS status;
2160 int saved_errno = 0;
2161
2162 snapdir = shadow_copy2_find_snapdir(tmp_ctx, handle, fsp->fsp_name);
2163 if (snapdir == NULL) {
2164 DEBUG(0,("shadow:snapdir not found for %s in get_shadow_copy_data\n",
2165 handle->conn->connectpath));
2166 errno = EINVAL;
2167 goto done;
2168 }
2169
2170 snapdir_smb_fname = synthetic_smb_fname(talloc_tos(),
2171 snapdir,
2172 NULL,
2173 NULL,
2174 0,
2175 fsp->fsp_name->flags);
2176 if (snapdir_smb_fname == NULL) {
2177 errno = ENOMEM;
2178 goto done;
2179 }
2180
2181 status = create_internal_dirfsp(handle->conn,
2182 snapdir_smb_fname,
2183 &dirfsp);
2184 if (!NT_STATUS_IS_OK(status)) {
2185 DBG_WARNING("create_internal_dir_fsp() failed for '%s'"
2186 " - %s\n", snapdir, nt_errstr(status));
2187 errno = ENOSYS;
2188 goto done;
2189 }
2190
2191 status = vfs_at_fspcwd(talloc_tos(), handle->conn, &fspcwd);
2192 if (!NT_STATUS_IS_OK(status)) {
2193 errno = ENOMEM;
2194 goto done;
2195 }
2196
2197 #ifdef O_DIRECTORY
2198 how.flags |= O_DIRECTORY;
2199 #endif
2200
2201 fd = SMB_VFS_NEXT_OPENAT(handle,
2202 fspcwd,
2203 snapdir_smb_fname,
2204 dirfsp,
2205 &how);
2206 if (fd == -1) {
2207 DBG_WARNING("SMB_VFS_NEXT_OPEN failed for '%s'"
2208 " - %s\n", snapdir, strerror(errno));
2209 errno = ENOSYS;
2210 goto done;
2211 }
2212 fsp_set_fd(dirfsp, fd);
2213
2214 /* Now we have the handle, check access here. */
2215 status = smbd_check_access_rights_fsp(fspcwd,
2216 dirfsp,
2217 false,
2218 SEC_DIR_LIST);
2219 if (!NT_STATUS_IS_OK(status)) {
2220 DBG_ERR("user does not have list permission "
2221 "on snapdir %s\n",
2222 fsp_str_dbg(dirfsp));
2223 errno = EACCES;
2224 goto done;
2225 }
2226
2227 p = SMB_VFS_NEXT_FDOPENDIR(handle, dirfsp, NULL, 0);
2228 if (!p) {
2229 DBG_NOTICE("shadow_copy2: SMB_VFS_NEXT_FDOPENDIR() failed for '%s'"
2230 " - %s\n", snapdir, strerror(errno));
2231 errno = ENOSYS;
2232 goto done;
2233 }
2234
2235 if (shadow_copy2_data != NULL) {
2236 shadow_copy2_data->num_volumes = 0;
2237 shadow_copy2_data->labels = NULL;
2238 }
2239
2240 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2241 goto done);
2242
2243 /*
2244 * Normally this function is called twice once with labels = false and
2245 * then with labels = true. When labels is false it will return the
2246 * number of volumes so that the caller can allocate memory for that
2247 * many labels. Therefore to eliminate snaplist both the times it is
2248 * good to check if labels is set or not.
2249 *
2250 * shadow_copy2_data is NULL when we only want to update the list and
2251 * don't want any labels.
2252 */
2253 if ((priv->snaps->regex != NULL) && (labels || shadow_copy2_data == NULL)) {
2254 get_snaplist = true;
2255 /* Reset the global snaplist */
2256 shadow_copy2_delete_snaplist(priv);
2257
2258 /* Set the current time as snaplist update time */
2259 time(&(priv->snaps->fetch_time));
2260 }
2261
2262 while ((d = SMB_VFS_NEXT_READDIR(handle, dirfsp, p))) {
2263 char snapshot[GMT_NAME_LEN+1];
2264 SHADOW_COPY_LABEL *tlabels;
2265
2266 /*
2267 * ignore names not of the right form in the snapshot
2268 * directory
2269 */
2270 if (!shadow_copy2_snapshot_to_gmt(
2271 handle, d->d_name,
2272 snapshot, sizeof(snapshot))) {
2273
2274 DEBUG(6, ("shadow_copy2_get_shadow_copy_data: "
2275 "ignoring %s\n", d->d_name));
2276 continue;
2277 }
2278 DEBUG(6,("shadow_copy2_get_shadow_copy_data: %s -> %s\n",
2279 d->d_name, snapshot));
2280
2281 if (get_snaplist) {
2282 /*
2283 * Create a snap entry for each successful
2284 * pattern match.
2285 */
2286 tmpentry = shadow_copy2_create_snapentry(priv);
2287 if (tmpentry == NULL) {
2288 DBG_ERR("talloc_zero() failed\n");
2289 goto done;
2290 }
2291 tmpentry->snapname = talloc_strdup(tmpentry, d->d_name);
2292 tmpentry->time_fmt = talloc_strdup(tmpentry, snapshot);
2293 }
2294
2295 if (shadow_copy2_data == NULL) {
2296 continue;
2297 }
2298
2299 if (!labels) {
2300 /* the caller doesn't want the labels */
2301 shadow_copy2_data->num_volumes++;
2302 continue;
2303 }
2304
2305 tlabels = talloc_realloc(shadow_copy2_data,
2306 shadow_copy2_data->labels,
2307 SHADOW_COPY_LABEL,
2308 shadow_copy2_data->num_volumes+1);
2309 if (tlabels == NULL) {
2310 DEBUG(0,("shadow_copy2: out of memory\n"));
2311 goto done;
2312 }
2313
2314 strlcpy(tlabels[shadow_copy2_data->num_volumes], snapshot,
2315 sizeof(*tlabels));
2316
2317 shadow_copy2_data->num_volumes++;
2318 shadow_copy2_data->labels = tlabels;
2319 }
2320
2321 shadow_copy2_sort_data(handle, shadow_copy2_data);
2322 ret = 0;
2323
2324 done:
2325 if (ret != 0) {
2326 saved_errno = errno;
2327 }
2328 TALLOC_FREE(fspcwd );
2329 if (p != NULL) {
2330 SMB_VFS_NEXT_CLOSEDIR(handle, p);
2331 p = NULL;
2332 if (dirfsp != NULL) {
2333 /*
2334 * VFS_CLOSEDIR implicitly
2335 * closed the associated fd.
2336 */
2337 fsp_set_fd(dirfsp, -1);
2338 }
2339 }
2340 if (dirfsp != NULL) {
2341 fd_close(dirfsp);
2342 file_free(NULL, dirfsp);
2343 }
2344 TALLOC_FREE(tmp_ctx);
2345 if (saved_errno != 0) {
2346 errno = saved_errno;
2347 }
2348 return ret;
2349 }
2350
2351 static int shadow_copy2_mkdirat(vfs_handle_struct *handle,
2352 struct files_struct *dirfsp,
2353 const struct smb_filename *smb_fname,
2354 mode_t mode)
2355 {
2356 struct smb_filename *full_fname = NULL;
2357 time_t timestamp = 0;
2358
2359 full_fname = full_path_from_dirfsp_atname(talloc_tos(),
2360 dirfsp,
2361 smb_fname);
2362 if (full_fname == NULL) {
2363 errno = ENOMEM;
2364 return -1;
2365 }
2366
2367 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2368 handle,
2369 full_fname,
2370 &timestamp,
2371 NULL)) {
2372 TALLOC_FREE(full_fname);
2373 return -1;
2374 }
2375 TALLOC_FREE(full_fname);
2376 if (timestamp != 0) {
2377 errno = EROFS;
2378 return -1;
2379 }
2380 return SMB_VFS_NEXT_MKDIRAT(handle,
2381 dirfsp,
2382 smb_fname,
2383 mode);
2384 }
2385
2386 static int shadow_copy2_fchflags(vfs_handle_struct *handle,
2387 struct files_struct *fsp,
2388 unsigned int flags)
2389 {
2390 time_t timestamp = 0;
2391
2392 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2393 handle,
2394 fsp->fsp_name,
2395 &timestamp,
2396 NULL)) {
2397 return -1;
2398 }
2399 if (timestamp != 0) {
2400 errno = EROFS;
2401 return -1;
2402 }
2403 return SMB_VFS_NEXT_FCHFLAGS(handle, fsp, flags);
2404 }
2405
2406 static int shadow_copy2_fsetxattr(struct vfs_handle_struct *handle,
2407 struct files_struct *fsp,
2408 const char *aname, const void *value,
2409 size_t size, int flags)
2410 {
2411 time_t timestamp = 0;
2412 const struct smb_filename *smb_fname = NULL;
2413
2414 smb_fname = fsp->fsp_name;
2415 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2416 handle,
2417 smb_fname,
2418 &timestamp,
2419 NULL)) {
2420 return -1;
2421 }
2422 if (timestamp != 0) {
2423 errno = EROFS;
2424 return -1;
2425 }
2426 return SMB_VFS_NEXT_FSETXATTR(handle, fsp,
2427 aname, value, size, flags);
2428 }
2429
2430 static NTSTATUS shadow_copy2_create_dfs_pathat(struct vfs_handle_struct *handle,
2431 struct files_struct *dirfsp,
2432 const struct smb_filename *smb_fname,
2433 const struct referral *reflist,
2434 size_t referral_count)
2435 {
2436 time_t timestamp = 0;
2437
2438 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2439 handle,
2440 smb_fname,
2441 &timestamp,
2442 NULL)) {
2443 return NT_STATUS_NO_MEMORY;
2444 }
2445 if (timestamp != 0) {
2446 return NT_STATUS_MEDIA_WRITE_PROTECTED;
2447 }
2448 return SMB_VFS_NEXT_CREATE_DFS_PATHAT(handle,
2449 dirfsp,
2450 smb_fname,
2451 reflist,
2452 referral_count);
2453 }
2454
2455 static NTSTATUS shadow_copy2_read_dfs_pathat(struct vfs_handle_struct *handle,
2456 TALLOC_CTX *mem_ctx,
2457 struct files_struct *dirfsp,
2458 struct smb_filename *smb_fname,
2459 struct referral **ppreflist,
2460 size_t *preferral_count)
2461 {
2462 time_t timestamp = 0;
2463 char *stripped = NULL;
2464 struct smb_filename *full_fname = NULL;
2465 struct smb_filename *conv = NULL;
2466 NTSTATUS status;
2467
2468 full_fname = full_path_from_dirfsp_atname(talloc_tos(),
2469 dirfsp,
2470 smb_fname);
2471 if (full_fname == NULL) {
2472 return NT_STATUS_NO_MEMORY;
2473 }
2474
2475 if (!shadow_copy2_strip_snapshot(mem_ctx,
2476 handle,
2477 full_fname,
2478 &timestamp,
2479 &stripped)) {
2480 TALLOC_FREE(full_fname);
2481 return NT_STATUS_NO_MEMORY;
2482 }
2483 if (timestamp == 0) {
2484 TALLOC_FREE(full_fname);
2485 TALLOC_FREE(stripped);
2486 return SMB_VFS_NEXT_READ_DFS_PATHAT(handle,
2487 mem_ctx,
2488 dirfsp,
2489 smb_fname,
2490 ppreflist,
2491 preferral_count);
2492 }
2493
2494 conv = cp_smb_filename(mem_ctx, full_fname);
2495 if (conv == NULL) {
2496 TALLOC_FREE(full_fname);
2497 TALLOC_FREE(stripped);
2498 return NT_STATUS_NO_MEMORY;
2499 }
2500 TALLOC_FREE(full_fname);
2501 conv->base_name = shadow_copy2_convert(conv,
2502 handle,
2503 stripped,
2504 timestamp);
2505 TALLOC_FREE(stripped);
2506 if (conv->base_name == NULL) {
2507 TALLOC_FREE(conv);
2508 return NT_STATUS_NO_MEMORY;
2509 }
2510
2511 status = SMB_VFS_NEXT_READ_DFS_PATHAT(handle,
2512 mem_ctx,
2513 handle->conn->cwd_fsp,
2514 conv,
2515 ppreflist,
2516 preferral_count);
2517
2518 if (NT_STATUS_IS_OK(status)) {
2519 /* Return any stat(2) info. */
2520 smb_fname->st = conv->st;
2521 }
2522
2523 TALLOC_FREE(conv);
2524 return status;
2525 }
2526
2527 static const char *shadow_copy2_connectpath(
2528 struct vfs_handle_struct *handle,
2529 const struct files_struct *dirfsp,
2530 const struct smb_filename *smb_fname_in)
2531 {
2532 time_t timestamp = 0;
2533 char *stripped = NULL;
2534 char *tmp = NULL;
2535 const char *fname = smb_fname_in->base_name;
2536 const struct smb_filename *full = NULL;
2537 struct smb_filename smb_fname = {0};
2538 struct smb_filename *result_fname = NULL;
2539 char *result = NULL;
2540 char *parent_dir = NULL;
2541 int saved_errno = 0;
2542 size_t rootpath_len = 0;
2543 struct shadow_copy2_private *priv = NULL;
2544
2545 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2546 return NULL);
2547
2548 DBG_DEBUG("Calc connect path for [%s]\n", fname);
2549
2550 if (priv->shadow_connectpath != NULL) {
2551 DBG_DEBUG("cached connect path is [%s]\n",
2552 priv->shadow_connectpath);
2553 return priv->shadow_connectpath;
2554 }
2555
2556 full = full_path_from_dirfsp_atname(
2557 talloc_tos(), dirfsp, smb_fname_in);
2558 if (full == NULL) {
2559 return NULL;
2560 }
2561
2562 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, full,
2563 &timestamp, &stripped)) {
2564 goto done;
2565 }
2566 if (timestamp == 0) {
2567 return SMB_VFS_NEXT_CONNECTPATH(handle, dirfsp, smb_fname_in);
2568 }
2569
2570 tmp = shadow_copy2_do_convert(talloc_tos(), handle, stripped, timestamp,
2571 &rootpath_len);
2572 if (tmp == NULL) {
2573 if (errno != ENOENT) {
2574 goto done;
2575 }
2576
2577 /*
2578 * If the converted path does not exist, and converting
2579 * the parent yields something that does exist, then
2580 * this path refers to something that has not been
2581 * created yet, relative to the parent path.
2582 * The snapshot finding is relative to the parent.
2583 * (usually snapshots are read/only but this is not
2584 * necessarily true).
2585 * This code also covers getting a wildcard in the
2586 * last component, because this function is called
2587 * prior to sanitizing the path, and in SMB1 we may
2588 * get wildcards in path names.
2589 */
2590 if (!parent_dirname(talloc_tos(), stripped, &parent_dir,
2591 NULL)) {
2592 errno = ENOMEM;
2593 goto done;
2594 }
2595
2596 tmp = shadow_copy2_do_convert(talloc_tos(), handle, parent_dir,
2597 timestamp, &rootpath_len);
2598 if (tmp == NULL) {
2599 goto done;
2600 }
2601 }
2602
2603 DBG_DEBUG("converted path is [%s] root path is [%.*s]\n", tmp,
2604 (int)rootpath_len, tmp);
2605
2606 tmp[rootpath_len] = '\0';
2607 smb_fname = (struct smb_filename) { .base_name = tmp };
2608
2609 result_fname = SMB_VFS_NEXT_REALPATH(handle, priv, &smb_fname);
2610 if (result_fname == NULL) {
2611 goto done;
2612 }
2613
2614 /*
2615 * SMB_VFS_NEXT_REALPATH returns a talloc'ed string.
2616 * Don't leak memory.
2617 */
2618 TALLOC_FREE(priv->shadow_realpath);
2619 priv->shadow_realpath = result_fname;
2620 result = priv->shadow_realpath->base_name;
2621
2622 DBG_DEBUG("connect path is [%s]\n", result);
2623
2624 done:
2625 if (result == NULL) {
2626 saved_errno = errno;
2627 }
2628 TALLOC_FREE(tmp);
2629 TALLOC_FREE(stripped);
2630 TALLOC_FREE(parent_dir);
2631 if (saved_errno != 0) {
2632 errno = saved_errno;
2633 }
2634 return result;
2635 }
2636
2637 static NTSTATUS shadow_copy2_parent_pathname(vfs_handle_struct *handle,
2638 TALLOC_CTX *ctx,
2639 const struct smb_filename *smb_fname_in,
2640 struct smb_filename **parent_dir_out,
2641 struct smb_filename **atname_out)
2642 {
2643 time_t timestamp = 0;
2644 char *stripped = NULL;
2645 char *converted_name = NULL;
2646 struct smb_filename *smb_fname = NULL;
2647 struct smb_filename *parent = NULL;
2648 struct smb_filename *atname = NULL;
2649 struct shadow_copy2_private *priv = NULL;
2650 bool ok = false;
2651 bool is_converted = false;
2652 NTSTATUS status = NT_STATUS_OK;
2653 TALLOC_CTX *frame = NULL;
2654
2655 SMB_VFS_HANDLE_GET_DATA(handle,
2656 priv,
2657 struct shadow_copy2_private,
2658 return NT_STATUS_INTERNAL_ERROR);
2659
2660 frame = talloc_stackframe();
2661
2662 smb_fname = cp_smb_filename(frame, smb_fname_in);
2663 if (smb_fname == NULL) {
2664 status = NT_STATUS_NO_MEMORY;
2665 goto fail;
2666 }
2667
2668 /* First, call the default PARENT_PATHNAME. */
2669 status = SMB_VFS_NEXT_PARENT_PATHNAME(handle,
2670 frame,
2671 smb_fname,
2672 &parent,
2673 &atname);
2674 if (!NT_STATUS_IS_OK(status)) {
2675 goto fail;
2676 }
2677
2678 if (parent->twrp == 0) {
2679 /*
2680 * Parent is not a snapshot path, return
2681 * the regular result.
2682 */
2683 status = NT_STATUS_OK;
2684 goto out;
2685 }
2686
2687 /* See if we can find a snapshot for the parent. */
2688 ok = shadow_copy2_strip_snapshot_converted(frame,
2689 handle,
2690 parent,
2691 &timestamp,
2692 &stripped,
2693 &is_converted);
2694 if (!ok) {
2695 status = map_nt_error_from_unix(errno);
2696 goto fail;
2697 }
2698
2699 if (is_converted) {
2700 /*
2701 * Already found snapshot for parent so wipe
2702 * out the twrp.
2703 */
2704 parent->twrp = 0;
2705 goto out;
2706 }
2707
2708 converted_name = shadow_copy2_convert(frame,
2709 handle,
2710 stripped,
2711 timestamp);
2712
2713 if (converted_name == NULL) {
2714 /*
2715 * Can't find snapshot for parent so wipe
2716 * out the twrp.
2717 */
2718 parent->twrp = 0;
2719 }
2720
2721 out:
2722
2723 *parent_dir_out = talloc_move(ctx, &parent);
2724 if (atname_out != NULL) {
2725 *atname_out = talloc_move(*parent_dir_out, &atname);
2726 }
2727
2728 fail:
2729
2730 TALLOC_FREE(frame);
2731 return status;
2732 }
2733
2734 static uint64_t shadow_copy2_disk_free(vfs_handle_struct *handle,
2735 const struct smb_filename *smb_fname,
2736 uint64_t *bsize,
2737 uint64_t *dfree,
2738 uint64_t *dsize)
2739 {
2740 time_t timestamp = 0;
2741 char *stripped = NULL;
2742 int saved_errno = 0;
2743 char *conv = NULL;
2744 struct smb_filename *conv_smb_fname = NULL;
2745 uint64_t ret = (uint64_t)-1;
2746
2747 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2748 handle,
2749 smb_fname,
2750 &timestamp,
2751 &stripped)) {
2752 return (uint64_t)-1;
2753 }
2754 if (timestamp == 0) {
2755 return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname,
2756 bsize, dfree, dsize);
2757 }
2758 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2759 TALLOC_FREE(stripped);
2760 if (conv == NULL) {
2761 return (uint64_t)-1;
2762 }
2763 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2764 conv,
2765 NULL,
2766 NULL,
2767 0,
2768 smb_fname->flags);
2769 if (conv_smb_fname == NULL) {
2770 TALLOC_FREE(conv);
2771 return (uint64_t)-1;
2772 }
2773 ret = SMB_VFS_NEXT_DISK_FREE(handle, conv_smb_fname,
2774 bsize, dfree, dsize);
2775 if (ret == (uint64_t)-1) {
2776 saved_errno = errno;
2777 }
2778 TALLOC_FREE(conv);
2779 TALLOC_FREE(conv_smb_fname);
2780 if (saved_errno != 0) {
2781 errno = saved_errno;
2782 }
2783 return ret;
2784 }
2785
2786 static int shadow_copy2_get_quota(vfs_handle_struct *handle,
2787 const struct smb_filename *smb_fname,
2788 enum SMB_QUOTA_TYPE qtype,
2789 unid_t id,
2790 SMB_DISK_QUOTA *dq)
2791 {
2792 time_t timestamp = 0;
2793 char *stripped = NULL;
2794 int ret;
2795 int saved_errno = 0;
2796 char *conv;
2797 struct smb_filename *conv_smb_fname = NULL;
2798
2799 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2800 handle,
2801 smb_fname,
2802 &timestamp,
2803 &stripped)) {
2804 return -1;
2805 }
2806 if (timestamp == 0) {
2807 return SMB_VFS_NEXT_GET_QUOTA(handle, smb_fname, qtype, id, dq);
2808 }
2809
2810 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2811 TALLOC_FREE(stripped);
2812 if (conv == NULL) {
2813 return -1;
2814 }
2815 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2816 conv,
2817 NULL,
2818 NULL,
2819 0,
2820 smb_fname->flags);
2821 if (conv_smb_fname == NULL) {
2822 TALLOC_FREE(conv);
2823 return -1;
2824 }
2825 ret = SMB_VFS_NEXT_GET_QUOTA(handle, conv_smb_fname, qtype, id, dq);
2826
2827 if (ret == -1) {
2828 saved_errno = errno;
2829 }
2830 TALLOC_FREE(conv);
2831 TALLOC_FREE(conv_smb_fname);
2832 if (saved_errno != 0) {
2833 errno = saved_errno;
2834 }
2835
2836 return ret;
2837 }
2838
2839 static ssize_t shadow_copy2_pwrite(vfs_handle_struct *handle,
2840 files_struct *fsp,
2841 const void *data,
2842 size_t n,
2843 off_t offset)
2844 {
2845 ssize_t nwritten;
2846
2847 nwritten = SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
2848 if (nwritten == -1) {
2849 if (errno == EBADF && fsp->fsp_flags.can_write) {
2850 errno = EROFS;
2851 }
2852 }
2853
2854 return nwritten;
2855 }
2856
2857 struct shadow_copy2_pwrite_state {
2858 vfs_handle_struct *handle;
2859 files_struct *fsp;
2860 ssize_t ret;
2861 struct vfs_aio_state vfs_aio_state;
2862 };
2863
2864 static void shadow_copy2_pwrite_done(struct tevent_req *subreq);
2865
2866 static struct tevent_req *shadow_copy2_pwrite_send(
2867 struct vfs_handle_struct *handle, TALLOC_CTX *mem_ctx,
2868 struct tevent_context *ev, struct files_struct *fsp,
2869 const void *data, size_t n, off_t offset)
2870 {
2871 struct tevent_req *req = NULL, *subreq = NULL;
2872 struct shadow_copy2_pwrite_state *state = NULL;
2873
2874 req = tevent_req_create(mem_ctx, &state,
2875 struct shadow_copy2_pwrite_state);
2876 if (req == NULL) {
2877 return NULL;
2878 }
2879 state->handle = handle;
2880 state->fsp = fsp;
2881
2882 subreq = SMB_VFS_NEXT_PWRITE_SEND(state,
2883 ev,
2884 handle,
2885 fsp,
2886 data,
2887 n,
2888 offset);
2889 if (tevent_req_nomem(subreq, req)) {
2890 return tevent_req_post(req, ev);
2891 }
2892 tevent_req_set_callback(subreq, shadow_copy2_pwrite_done, req);
2893
2894 return req;
2895 }
2896
2897 static void shadow_copy2_pwrite_done(struct tevent_req *subreq)
2898 {
2899 struct tevent_req *req = tevent_req_callback_data(
2900 subreq, struct tevent_req);
2901 struct shadow_copy2_pwrite_state *state = tevent_req_data(
2902 req, struct shadow_copy2_pwrite_state);
2903
2904 state->ret = SMB_VFS_PWRITE_RECV(subreq, &state->vfs_aio_state);
2905 TALLOC_FREE(subreq);
2906 if (state->ret == -1) {
2907 tevent_req_error(req, state->vfs_aio_state.error);
2908 return;
2909 }
2910
2911 tevent_req_done(req);
2912 }
2913
2914 static ssize_t shadow_copy2_pwrite_recv(struct tevent_req *req,
2915 struct vfs_aio_state *vfs_aio_state)
2916 {
2917 struct shadow_copy2_pwrite_state *state = tevent_req_data(
2918 req, struct shadow_copy2_pwrite_state);
2919
2920 if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
2921 if ((vfs_aio_state->error == EBADF) &&
2922 state->fsp->fsp_flags.can_write)
2923 {
2924 vfs_aio_state->error = EROFS;
2925 errno = EROFS;
2926 }
2927 return -1;
2928 }
2929
2930 *vfs_aio_state = state->vfs_aio_state;
2931 return state->ret;
2932 }
2933
2934 static int shadow_copy2_connect(struct vfs_handle_struct *handle,
2935 const char *service, const char *user)
2936 {
2937 struct shadow_copy2_config *config;
2938 struct shadow_copy2_private *priv;
2939 int ret;
2940 const char *snapdir;
2941 const char *snapprefix = NULL;
2942 const char *delimiter;
2943 const char *gmt_format;
2944 const char *sort_order;
2945 const char *basedir = NULL;
2946 const char *snapsharepath = NULL;
2947 const char *mount_point;
2948
2949 DBG_DEBUG("cnum[%" PRIu32 "], connectpath[%s]\n",
2950 handle->conn->cnum,
2951 handle->conn->connectpath);
2952
2953 ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
2954 if (ret < 0) {
2955 return ret;
2956 }
2957
2958 priv = talloc_zero(handle->conn, struct shadow_copy2_private);
2959 if (priv == NULL) {
2960 DBG_ERR("talloc_zero() failed\n");
2961 errno = ENOMEM;
2962 return -1;
2963 }
2964
2965 priv->snaps = talloc_zero(priv, struct shadow_copy2_snaplist_info);
2966 if (priv->snaps == NULL) {
2967 DBG_ERR("talloc_zero() failed\n");
2968 errno = ENOMEM;
2969 return -1;
2970 }
2971
2972 config = talloc_zero(priv, struct shadow_copy2_config);
2973 if (config == NULL) {
2974 DEBUG(0, ("talloc_zero() failed\n"));
2975 errno = ENOMEM;
2976 return -1;
2977 }
2978
2979 priv->config = config;
2980
2981 gmt_format = lp_parm_const_string(SNUM(handle->conn),
2982 "shadow", "format",
2983 GMT_FORMAT);
2984 config->gmt_format = talloc_strdup(config, gmt_format);
2985 if (config->gmt_format == NULL) {
2986 DEBUG(0, ("talloc_strdup() failed\n"));
2987 errno = ENOMEM;
2988 return -1;
2989 }
2990
2991 /* config->gmt_format must not contain a path separator. */
2992 if (strchr(config->gmt_format, '/') != NULL) {
2993 DEBUG(0, ("shadow:format %s must not contain a /"
2994 "character. Unable to initialize module.\n",
2995 config->gmt_format));
2996 errno = EINVAL;
2997 return -1;
2998 }
2999
3000 config->use_sscanf = lp_parm_bool(SNUM(handle->conn),
3001 "shadow", "sscanf", false);
3002
3003 config->use_localtime = lp_parm_bool(SNUM(handle->conn),
3004 "shadow", "localtime",
3005 false);
3006
3007 snapdir = lp_parm_const_string(SNUM(handle->conn),
3008 "shadow", "snapdir",
3009 ".snapshots");
3010 config->snapdir = talloc_strdup(config, snapdir);
3011 if (config->snapdir == NULL) {
3012 DEBUG(0, ("talloc_strdup() failed\n"));
3013 errno = ENOMEM;
3014 return -1;
3015 }
3016
3017 snapprefix = lp_parm_const_string(SNUM(handle->conn),
3018 "shadow", "snapprefix",
3019 NULL);
3020 if (snapprefix != NULL) {
3021 priv->snaps->regex = talloc_zero(priv->snaps, regex_t);
3022 if (priv->snaps->regex == NULL) {
3023 DBG_ERR("talloc_zero() failed\n");
3024 errno = ENOMEM;
3025 return -1;
3026 }
3027
3028 /* pre-compute regex rule for matching pattern later */
3029 ret = regcomp(priv->snaps->regex, snapprefix, 0);
3030 if (ret) {
3031 DBG_ERR("Failed to create regex object\n");
3032 return -1;
3033 }
3034 }
3035
3036 delimiter = lp_parm_const_string(SNUM(handle->conn),
3037 "shadow", "delimiter",
3038 "_GMT");
3039 if (delimiter != NULL) {
3040 priv->config->delimiter = talloc_strdup(priv->config, delimiter);
3041 if (priv->config->delimiter == NULL) {
3042 DBG_ERR("talloc_strdup() failed\n");
3043 errno = ENOMEM;
3044 return -1;
3045 }
3046 }
3047
3048 config->snapdirseverywhere = lp_parm_bool(SNUM(handle->conn),
3049 "shadow",
3050 "snapdirseverywhere",
3051 false);
3052
3053 config->crossmountpoints = lp_parm_bool(SNUM(handle->conn),
3054 "shadow", "crossmountpoints",
3055 false);
3056
3057 if (config->crossmountpoints && !config->snapdirseverywhere) {
3058 DBG_WARNING("Warning: 'crossmountpoints' depends on "
3059 "'snapdirseverywhere'. Disabling crossmountpoints.\n");
3060 }
3061
3062 config->fixinodes = lp_parm_bool(SNUM(handle->conn),
3063 "shadow", "fixinodes",
3064 false);
3065
3066 sort_order = lp_parm_const_string(SNUM(handle->conn),
3067 "shadow", "sort", "desc");
3068 config->sort_order = talloc_strdup(config, sort_order);
3069 if (config->sort_order == NULL) {
3070 DEBUG(0, ("talloc_strdup() failed\n"));
3071 errno = ENOMEM;
3072 return -1;
3073 }
3074
3075 mount_point = lp_parm_const_string(SNUM(handle->conn),
3076 "shadow", "mountpoint", NULL);
3077 if (mount_point != NULL) {
3078 if (mount_point[0] != '/') {
3079 DBG_WARNING("Warning: 'mountpoint' is relative "
3080 "('%s'), but it has to be an absolute "
3081 "path. Ignoring provided value.\n",
3082 mount_point);
3083 mount_point = NULL;
3084 } else {
3085 char *p;
3086 p = strstr(handle->conn->connectpath, mount_point);
3087 if (p != handle->conn->connectpath) {
3088 DBG_WARNING("Warning: the share root (%s) is "
3089 "not a subdirectory of the "
3090 "specified mountpoint (%s). "
3091 "Ignoring provided value.\n",
3092 handle->conn->connectpath,
3093 mount_point);
3094 mount_point = NULL;
3095 }
3096 }
3097 }
3098
3099 if (mount_point != NULL) {
3100 config->mount_point = talloc_strdup(config, mount_point);
3101 if (config->mount_point == NULL) {
3102 DBG_ERR("talloc_strdup() failed\n");
3103 return -1;
3104 }
3105 } else {
3106 config->mount_point = shadow_copy2_find_mount_point(config,
3107 handle);
3108 if (config->mount_point == NULL) {
3109 DBG_WARNING("shadow_copy2_find_mount_point "
3110 "of the share root '%s' failed: %s\n",
3111 handle->conn->connectpath, strerror(errno));
3112 return -1;
3113 }
3114 }
3115
3116 basedir = lp_parm_const_string(SNUM(handle->conn),
3117 "shadow", "basedir", NULL);
3118
3119 if (basedir != NULL) {
3120 if (basedir[0] != '/') {
3121 DBG_WARNING("Warning: 'basedir' is "
3122 "relative ('%s'), but it has to be an "
3123 "absolute path. Disabling basedir.\n",
3124 basedir);
3125 basedir = NULL;
3126 } else {
3127 char *p;
3128 p = strstr(basedir, config->mount_point);
3129 if (p != basedir) {
3130 DEBUG(1, ("Warning: basedir (%s) is not a "
3131 "subdirectory of the share root's "
3132 "mount point (%s). "
3133 "Disabling basedir\n",
3134 basedir, config->mount_point));
3135 basedir = NULL;
3136 }
3137 }
3138 }
3139
3140 if (config->snapdirseverywhere && basedir != NULL) {
3141 DBG_WARNING("Warning: 'basedir' is incompatible "
3142 "with 'snapdirseverywhere'. Disabling basedir.\n");
3143 basedir = NULL;
3144 }
3145
3146 snapsharepath = lp_parm_const_string(SNUM(handle->conn), "shadow",
3147 "snapsharepath", NULL);
3148 if (snapsharepath != NULL) {
3149 if (snapsharepath[0] == '/') {
3150 DBG_WARNING("Warning: 'snapsharepath' is "
3151 "absolute ('%s'), but it has to be a "
3152 "relative path. Disabling snapsharepath.\n",
3153 snapsharepath);
3154 snapsharepath = NULL;
3155 }
3156 if (config->snapdirseverywhere && snapsharepath != NULL) {
3157 DBG_WARNING("Warning: 'snapsharepath' is incompatible "
3158 "with 'snapdirseverywhere'. Disabling "
3159 "snapsharepath.\n");
3160 snapsharepath = NULL;
3161 }
3162 }
3163
3164 if (basedir != NULL && snapsharepath != NULL) {
3165 DBG_WARNING("Warning: 'snapsharepath' is incompatible with "
3166 "'basedir'. Disabling snapsharepath\n");
3167 snapsharepath = NULL;
3168 }
3169
3170 if (snapsharepath != NULL) {
3171 config->rel_connectpath = talloc_strdup(config, snapsharepath);
3172 if (config->rel_connectpath == NULL) {
3173 DBG_ERR("talloc_strdup() failed\n");
3174 errno = ENOMEM;
3175 return -1;
3176 }
3177 }
3178
3179 if (basedir == NULL) {
3180 basedir = config->mount_point;
3181 }
3182
3183 if (config->rel_connectpath == NULL &&
3184 strlen(basedir) < strlen(handle->conn->connectpath)) {
3185 config->rel_connectpath = talloc_strdup(config,
3186 handle->conn->connectpath + strlen(basedir));
3187 if (config->rel_connectpath == NULL) {
3188 DEBUG(0, ("talloc_strdup() failed\n"));
3189 errno = ENOMEM;
3190 return -1;
3191 }
3192 }
3193
3194 if (config->snapdir[0] == '/') {
3195 config->snapdir_absolute = true;
3196
3197 if (config->snapdirseverywhere) {
3198 DBG_WARNING("Warning: An absolute snapdir is "
3199 "incompatible with 'snapdirseverywhere', "
3200 "setting 'snapdirseverywhere' to "
3201 "false.\n");
3202 config->snapdirseverywhere = false;
3203 }
3204
3205 if (config->crossmountpoints) {
3206 DBG_WARNING("Warning: 'crossmountpoints' is not "
3207 "supported with an absolute snapdir. "
3208 "Disabling it.\n");
3209 config->crossmountpoints = false;
3210 }
3211
3212 config->snapshot_basepath = config->snapdir;
3213 } else {
3214 config->snapshot_basepath = talloc_asprintf(config, "%s/%s",
3215 config->mount_point, config->snapdir);
3216 if (config->snapshot_basepath == NULL) {
3217 DEBUG(0, ("talloc_asprintf() failed\n"));
3218 errno = ENOMEM;
3219 return -1;
3220 }
3221 }
3222
3223 trim_string(config->mount_point, NULL, "/");
3224 trim_string(config->rel_connectpath, "/", "/");
3225 trim_string(config->snapdir, NULL, "/");
3226 trim_string(config->snapshot_basepath, NULL, "/");
3227
3228 DEBUG(10, ("shadow_copy2_connect: configuration:\n"
3229 " share root: '%s'\n"
3230 " mountpoint: '%s'\n"
3231 " rel share root: '%s'\n"
3232 " snapdir: '%s'\n"
3233 " snapprefix: '%s'\n"
3234 " delimiter: '%s'\n"
3235 " snapshot base path: '%s'\n"
3236 " format: '%s'\n"
3237 " use sscanf: %s\n"
3238 " snapdirs everywhere: %s\n"
3239 " cross mountpoints: %s\n"
3240 " fix inodes: %s\n"
3241 " sort order: %s\n"
3242 "",
3243 handle->conn->connectpath,
3244 config->mount_point,
3245 config->rel_connectpath,
3246 config->snapdir,
3247 snapprefix,
3248 config->delimiter,
3249 config->snapshot_basepath,
3250 config->gmt_format,
3251 config->use_sscanf ? "yes" : "no",
3252 config->snapdirseverywhere ? "yes" : "no",
3253 config->crossmountpoints ? "yes" : "no",
3254 config->fixinodes ? "yes" : "no",
3255 config->sort_order
3256 ));
3257
3258
3259 SMB_VFS_HANDLE_SET_DATA(handle, priv,
3260 NULL, struct shadow_copy2_private,
3261 return -1);
3262
3263 return 0;
3264 }
3265
3266 static struct vfs_fn_pointers vfs_shadow_copy2_fns = {
3267 .connect_fn = shadow_copy2_connect,
3268 .disk_free_fn = shadow_copy2_disk_free,
3269 .get_quota_fn = shadow_copy2_get_quota,
3270 .create_dfs_pathat_fn = shadow_copy2_create_dfs_pathat,
3271 .read_dfs_pathat_fn = shadow_copy2_read_dfs_pathat,
3272 .renameat_fn = shadow_copy2_renameat,
3273 .linkat_fn = shadow_copy2_linkat,
3274 .symlinkat_fn = shadow_copy2_symlinkat,
3275 .stat_fn = shadow_copy2_stat,
3276 .lstat_fn = shadow_copy2_lstat,
3277 .fstat_fn = shadow_copy2_fstat,
3278 .fstatat_fn = shadow_copy2_fstatat,
3279 .openat_fn = shadow_copy2_openat,
3280 .unlinkat_fn = shadow_copy2_unlinkat,
3281 .fchmod_fn = shadow_copy2_fchmod,
3282 .chdir_fn = shadow_copy2_chdir,
3283 .fntimes_fn = shadow_copy2_fntimes,
3284 .readlinkat_fn = shadow_copy2_readlinkat,
3285 .mknodat_fn = shadow_copy2_mknodat,
3286 .realpath_fn = shadow_copy2_realpath,
3287 .get_shadow_copy_data_fn = shadow_copy2_get_shadow_copy_data,
3288 .mkdirat_fn = shadow_copy2_mkdirat,
3289 .fsetxattr_fn = shadow_copy2_fsetxattr,
3290 .fchflags_fn = shadow_copy2_fchflags,
3291 .pwrite_fn = shadow_copy2_pwrite,
3292 .pwrite_send_fn = shadow_copy2_pwrite_send,
3293 .pwrite_recv_fn = shadow_copy2_pwrite_recv,
3294 .connectpath_fn = shadow_copy2_connectpath,
3295 .parent_pathname_fn = shadow_copy2_parent_pathname,
3296 };
3297
3298 static_decl_vfs;
3299 NTSTATUS vfs_shadow_copy2_init(TALLOC_CTX *ctx)
3300 {
3301 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
3302 "shadow_copy2", &vfs_shadow_copy2_fns);
3303 }
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