Line data Source code
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 : * 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 0 : static struct shadow_copy2_snapentry *shadow_copy2_create_snapentry(
100 : struct shadow_copy2_private *priv)
101 : {
102 0 : struct shadow_copy2_snapentry *tmpentry = NULL;
103 :
104 0 : tmpentry = talloc_zero(priv->snaps, struct shadow_copy2_snapentry);
105 0 : if (tmpentry == NULL) {
106 0 : DBG_ERR("talloc_zero() failed\n");
107 0 : errno = ENOMEM;
108 0 : return NULL;
109 : }
110 :
111 0 : DLIST_ADD(priv->snaps->snaplist, tmpentry);
112 :
113 0 : 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 0 : static void shadow_copy2_delete_snaplist(struct shadow_copy2_private *priv)
123 : {
124 0 : struct shadow_copy2_snapentry *tmp = NULL;
125 :
126 0 : while ((tmp = priv->snaps->snaplist) != NULL) {
127 0 : DLIST_REMOVE(priv->snaps->snaplist, tmp);
128 0 : talloc_free(tmp);
129 : }
130 0 : }
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 0 : 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 0 : ssize_t snaptime_len = -1;
148 0 : struct shadow_copy2_snapentry *entry = NULL;
149 :
150 0 : snaptime_len = strftime(snap_str, len, GMT_FORMAT, timestamp);
151 0 : if (snaptime_len == 0) {
152 0 : DBG_ERR("strftime failed\n");
153 0 : return -1;
154 : }
155 :
156 0 : snaptime_len = -1;
157 :
158 0 : for (entry = priv->snaps->snaplist; entry; entry = entry->next) {
159 0 : if (strcmp(entry->time_fmt, snap_str) == 0) {
160 0 : snaptime_len = snprintf(snap_str, len, "%s",
161 : entry->snapname);
162 0 : return snaptime_len;
163 : }
164 : }
165 :
166 0 : snap_str[0] = 0;
167 0 : 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 0 : static bool shadow_copy2_update_snaplist(struct vfs_handle_struct *handle,
184 : time_t snap_time)
185 : {
186 0 : int ret = -1;
187 0 : bool snaplist_updated = false;
188 0 : struct files_struct fsp = {0};
189 0 : struct smb_filename smb_fname = {0};
190 0 : double seconds = 0.0;
191 0 : struct shadow_copy2_private *priv = NULL;
192 :
193 0 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
194 : return false);
195 :
196 0 : 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 0 : if (seconds > 0 || (priv->snaps->snaplist == NULL)) {
204 0 : smb_fname.base_name = discard_const_p(char, ".");
205 0 : fsp.fsp_name = &smb_fname;
206 :
207 0 : ret = shadow_copy2_get_shadow_copy_data(handle, &fsp,
208 : NULL, false);
209 0 : if (ret == 0) {
210 0 : snaplist_updated = true;
211 : } else {
212 0 : DBG_ERR("Failed to get shadow copy data\n");
213 : }
214 :
215 : }
216 :
217 0 : return snaplist_updated;
218 : }
219 :
220 0 : 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 0 : num_offsets = 0;
229 :
230 0 : p = str;
231 0 : while ((p = strchr(p, '/')) != NULL) {
232 0 : num_offsets += 1;
233 0 : p += 1;
234 : }
235 :
236 0 : offsets = talloc_array(mem_ctx, size_t, num_offsets);
237 0 : if (offsets == NULL) {
238 0 : return false;
239 : }
240 :
241 0 : p = str;
242 0 : num_offsets = 0;
243 0 : while ((p = strchr(p, '/')) != NULL) {
244 0 : offsets[num_offsets] = p-str;
245 0 : num_offsets += 1;
246 0 : p += 1;
247 : }
248 :
249 0 : *poffsets = offsets;
250 0 : *pnum_offsets = num_offsets;
251 0 : return true;
252 : }
253 :
254 : /**
255 : * Given a timestamp, build the posix level GMT-tag string
256 : * based on the configurable format.
257 : */
258 0 : 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 0 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
269 : return 0);
270 :
271 0 : config = priv->config;
272 :
273 0 : if (config->use_sscanf) {
274 0 : snaptime_len = snprintf(snaptime_string,
275 : len,
276 0 : config->gmt_format,
277 : (unsigned long)snapshot);
278 0 : if (snaptime_len <= 0) {
279 0 : DEBUG(10, ("snprintf failed\n"));
280 0 : return -1;
281 : }
282 : } else {
283 0 : if (config->use_localtime) {
284 0 : if (localtime_r(&snapshot, &snap_tm) == 0) {
285 0 : DEBUG(10, ("gmtime_r failed\n"));
286 0 : return -1;
287 : }
288 : } else {
289 0 : if (gmtime_r(&snapshot, &snap_tm) == 0) {
290 0 : DEBUG(10, ("gmtime_r failed\n"));
291 0 : return -1;
292 : }
293 : }
294 :
295 0 : if (priv->snaps->regex != NULL) {
296 0 : snaptime_len = shadow_copy2_saved_snapname(priv,
297 : &snap_tm, snaptime_string, len);
298 0 : if (snaptime_len >= 0)
299 0 : 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 0 : if (!shadow_copy2_update_snaplist(handle, snapshot)) {
307 0 : DBG_DEBUG("shadow_copy2_update_snaplist "
308 : "failed\n");
309 0 : return -1;
310 : }
311 :
312 0 : return shadow_copy2_saved_snapname(priv,
313 : &snap_tm, snaptime_string, len);
314 : }
315 :
316 0 : snaptime_len = strftime(snaptime_string,
317 : len,
318 0 : config->gmt_format,
319 : &snap_tm);
320 0 : if (snaptime_len == 0) {
321 0 : DEBUG(10, ("strftime failed\n"));
322 0 : return -1;
323 : }
324 : }
325 :
326 0 : 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 0 : 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 0 : ssize_t snaptime_len = 0;
346 0 : char *result = NULL;
347 : struct shadow_copy2_config *config;
348 : struct shadow_copy2_private *priv;
349 :
350 0 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
351 : return NULL);
352 :
353 0 : config = priv->config;
354 :
355 0 : snaptime_len = shadow_copy2_posix_gmt_string(handle,
356 : snapshot,
357 : snaptime_string,
358 : sizeof(snaptime_string));
359 0 : if (snaptime_len <= 0) {
360 0 : return NULL;
361 : }
362 :
363 0 : if (config->snapdir_absolute) {
364 0 : result = talloc_asprintf(mem_ctx, "%s/%s",
365 : config->snapdir, snaptime_string);
366 : } else {
367 0 : result = talloc_asprintf(mem_ctx, "/%s/%s",
368 : config->snapdir, snaptime_string);
369 : }
370 0 : if (result == NULL) {
371 0 : DEBUG(1, (__location__ " talloc_asprintf failed\n"));
372 : }
373 :
374 0 : 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 0 : 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 0 : ssize_t snaptime_len = 0;
391 0 : char *result = NULL;
392 : struct shadow_copy2_private *priv;
393 :
394 0 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
395 : return NULL);
396 :
397 0 : snaptime_len = shadow_copy2_posix_gmt_string(handle,
398 : snapshot,
399 : snaptime_string,
400 : sizeof(snaptime_string));
401 0 : if (snaptime_len <= 0) {
402 0 : return NULL;
403 : }
404 :
405 0 : result = talloc_asprintf(mem_ctx, "%s/%s",
406 0 : priv->config->snapshot_basepath, snaptime_string);
407 0 : if (result == NULL) {
408 0 : DEBUG(1, (__location__ " talloc_asprintf failed\n"));
409 : }
410 :
411 0 : return result;
412 : }
413 :
414 0 : static char *make_path_absolute(TALLOC_CTX *mem_ctx,
415 : struct shadow_copy2_private *priv,
416 : const char *name)
417 : {
418 0 : char *newpath = NULL;
419 0 : char *abs_path = NULL;
420 :
421 0 : if (name[0] != '/') {
422 0 : newpath = talloc_asprintf(mem_ctx,
423 : "%s/%s",
424 : priv->shadow_cwd,
425 : name);
426 0 : if (newpath == NULL) {
427 0 : return NULL;
428 : }
429 0 : name = newpath;
430 : }
431 0 : abs_path = canonicalize_absolute_path(mem_ctx, name);
432 0 : TALLOC_FREE(newpath);
433 0 : return abs_path;
434 : }
435 :
436 : /* Return a $cwd-relative path. */
437 0 : static bool make_relative_path(const char *cwd, char *abs_path)
438 : {
439 0 : size_t cwd_len = strlen(cwd);
440 0 : size_t abs_len = strlen(abs_path);
441 :
442 0 : if (abs_len < cwd_len) {
443 0 : return false;
444 : }
445 0 : if (memcmp(abs_path, cwd, cwd_len) != 0) {
446 0 : return false;
447 : }
448 : /* The cwd_len != 1 case is for $cwd == '/' */
449 0 : if (cwd_len != 1 &&
450 0 : abs_path[cwd_len] != '/' &&
451 0 : abs_path[cwd_len] != '\0')
452 : {
453 0 : return false;
454 : }
455 0 : if (abs_path[cwd_len] == '/') {
456 0 : cwd_len++;
457 : }
458 0 : memmove(abs_path, &abs_path[cwd_len], abs_len + 1 - cwd_len);
459 0 : 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 0 : 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 0 : size_t snapdirlen = 0;
481 0 : char *p = strstr_m(abs_path, priv->config->snapdir);
482 0 : char *q = NULL;
483 0 : char *connect_path = NULL;
484 : char snapshot[GMT_NAME_LEN+1];
485 :
486 0 : *ppath_already_converted = false;
487 :
488 0 : if (p == NULL) {
489 : /* Must at least contain shadow:snapdir. */
490 0 : return 0;
491 : }
492 :
493 0 : if (priv->config->snapdir[0] == '/' &&
494 : p != abs_path) {
495 : /* Absolute shadow:snapdir must be at the start. */
496 0 : return 0;
497 : }
498 :
499 0 : snapdirlen = strlen(priv->config->snapdir);
500 0 : if (p[snapdirlen] != '/') {
501 : /* shadow:snapdir must end as a separate component. */
502 0 : return 0;
503 : }
504 :
505 0 : if (p > abs_path && p[-1] != '/') {
506 : /* shadow:snapdir must start as a separate component. */
507 0 : return 0;
508 : }
509 :
510 0 : p += snapdirlen;
511 0 : 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 0 : q = strchr(p, '/');
519 0 : if (q == NULL) {
520 : /*
521 : * No next path component.
522 : * Use entire string.
523 : */
524 0 : connect_path = talloc_strdup(mem_ctx,
525 : abs_path);
526 : } else {
527 0 : connect_path = talloc_strndup(mem_ctx,
528 : abs_path,
529 0 : q - abs_path);
530 : }
531 0 : if (connect_path == NULL) {
532 0 : 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 0 : 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 0 : if (!shadow_copy2_snapshot_to_gmt(handle,
549 : p,
550 : snapshot,
551 : sizeof(snapshot))) {
552 0 : TALLOC_FREE(connect_path);
553 0 : return 0;
554 : }
555 :
556 0 : if (pconnectpath != NULL) {
557 0 : *pconnectpath = connect_path;
558 : }
559 :
560 0 : *ppath_already_converted = true;
561 :
562 0 : DBG_DEBUG("path |%s| is already converted. "
563 : "connect path = |%s|\n",
564 : abs_path,
565 : connect_path);
566 :
567 0 : 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 0 : 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 0 : char *stripped = NULL;
596 : struct shadow_copy2_private *priv;
597 0 : char *abs_path = NULL;
598 0 : bool ret = true;
599 0 : bool already_converted = false;
600 0 : int err = 0;
601 :
602 0 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
603 : return false);
604 :
605 0 : DBG_DEBUG("[from %s()] Path '%s'\n",
606 : function, smb_fname_str_dbg(smb_fname));
607 :
608 0 : if (_already_converted != NULL) {
609 0 : *_already_converted = false;
610 : }
611 :
612 0 : abs_path = make_path_absolute(mem_ctx, priv, smb_fname->base_name);
613 0 : if (abs_path == NULL) {
614 0 : ret = false;
615 0 : goto out;
616 : }
617 :
618 0 : DBG_DEBUG("abs path '%s'\n", abs_path);
619 :
620 0 : err = check_for_converted_path(mem_ctx,
621 : handle,
622 : priv,
623 : abs_path,
624 : &already_converted,
625 : psnappath);
626 0 : if (err != 0) {
627 : /* error in conversion. */
628 0 : ret = false;
629 0 : goto out;
630 : }
631 :
632 0 : if (already_converted) {
633 0 : if (_already_converted != NULL) {
634 0 : *_already_converted = true;
635 : }
636 0 : goto out;
637 : }
638 :
639 0 : if (smb_fname->twrp == 0) {
640 0 : goto out;
641 : }
642 :
643 0 : if (ptimestamp != NULL) {
644 0 : *ptimestamp = nt_time_to_unix(smb_fname->twrp);
645 : }
646 :
647 0 : if (pstripped != NULL) {
648 0 : stripped = talloc_strdup(mem_ctx, abs_path);
649 0 : if (stripped == NULL) {
650 0 : ret = false;
651 0 : goto out;
652 : }
653 :
654 0 : if (smb_fname->base_name[0] != '/') {
655 0 : ret = make_relative_path(priv->shadow_cwd, stripped);
656 0 : if (!ret) {
657 0 : DBG_DEBUG("Path '%s' "
658 : "doesn't start with cwd '%s'\n",
659 : stripped, priv->shadow_cwd);
660 0 : ret = false;
661 0 : errno = ENOENT;
662 0 : goto out;
663 : }
664 : }
665 0 : *pstripped = stripped;
666 : }
667 :
668 0 : ret = true;
669 :
670 0 : out:
671 0 : TALLOC_FREE(abs_path);
672 0 : 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 0 : 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 0 : 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 0 : 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 0 : 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 0 : static char *shadow_copy2_find_mount_point(TALLOC_CTX *mem_ctx,
727 : vfs_handle_struct *handle)
728 : {
729 0 : char *path = talloc_strdup(mem_ctx, handle->conn->connectpath);
730 : dev_t dev;
731 : struct stat st;
732 : char *p;
733 :
734 0 : if (stat(path, &st) != 0) {
735 0 : talloc_free(path);
736 0 : return NULL;
737 : }
738 :
739 0 : dev = st.st_dev;
740 :
741 0 : while ((p = strrchr(path, '/')) && p > path) {
742 0 : *p = 0;
743 0 : if (stat(path, &st) != 0) {
744 0 : talloc_free(path);
745 0 : return NULL;
746 : }
747 0 : if (st.st_dev != dev) {
748 0 : *p = '/';
749 0 : break;
750 : }
751 : }
752 :
753 0 : 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 0 : 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 0 : char *result = NULL;
770 0 : size_t *slashes = NULL;
771 : unsigned num_slashes;
772 0 : char *path = NULL;
773 : size_t pathlen;
774 0 : char *insert = NULL;
775 0 : char *converted = NULL;
776 0 : size_t insertlen, connectlen = 0;
777 0 : 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 0 : size_t in_share_offset = 0;
783 :
784 0 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
785 : return NULL);
786 :
787 0 : config = priv->config;
788 :
789 0 : DEBUG(10, ("converting '%s'\n", name));
790 :
791 0 : if (!config->snapdirseverywhere) {
792 : int ret;
793 : char *snapshot_path;
794 :
795 0 : snapshot_path = shadow_copy2_snapshot_path(talloc_tos(),
796 : handle,
797 : timestamp);
798 0 : if (snapshot_path == NULL) {
799 0 : goto fail;
800 : }
801 :
802 0 : if (config->rel_connectpath == NULL) {
803 0 : converted = talloc_asprintf(mem_ctx, "%s/%s",
804 : snapshot_path, name);
805 : } else {
806 0 : converted = talloc_asprintf(mem_ctx, "%s/%s/%s",
807 : snapshot_path,
808 : config->rel_connectpath,
809 : name);
810 : }
811 0 : if (converted == NULL) {
812 0 : goto fail;
813 : }
814 :
815 0 : converted_fname = (struct smb_filename) {
816 : .base_name = converted,
817 : };
818 :
819 0 : ret = SMB_VFS_NEXT_LSTAT(handle, &converted_fname);
820 0 : DEBUG(10, ("Trying[not snapdirseverywhere] %s: %d (%s)\n",
821 : converted,
822 : ret, ret == 0 ? "ok" : strerror(errno)));
823 0 : if (ret == 0) {
824 0 : DEBUG(10, ("Found %s\n", converted));
825 0 : result = converted;
826 0 : converted = NULL;
827 0 : if (snaproot_len != NULL) {
828 0 : *snaproot_len = strlen(snapshot_path);
829 0 : if (config->rel_connectpath != NULL) {
830 0 : *snaproot_len +=
831 0 : strlen(config->rel_connectpath) + 1;
832 : }
833 : }
834 0 : goto fail;
835 : } else {
836 0 : errno = ENOENT;
837 0 : goto fail;
838 : }
839 : /* never reached ... */
840 : }
841 :
842 0 : connectlen = strlen(handle->conn->connectpath);
843 0 : if (name[0] == 0) {
844 0 : path = talloc_strdup(mem_ctx, handle->conn->connectpath);
845 : } else {
846 0 : path = talloc_asprintf(
847 0 : mem_ctx, "%s/%s", handle->conn->connectpath, name);
848 : }
849 0 : if (path == NULL) {
850 0 : errno = ENOMEM;
851 0 : goto fail;
852 : }
853 0 : pathlen = talloc_get_size(path)-1;
854 :
855 0 : if (!shadow_copy2_find_slashes(talloc_tos(), path,
856 : &slashes, &num_slashes)) {
857 0 : goto fail;
858 : }
859 :
860 0 : insert = shadow_copy2_insert_string(talloc_tos(), handle, timestamp);
861 0 : if (insert == NULL) {
862 0 : goto fail;
863 : }
864 0 : insertlen = talloc_get_size(insert)-1;
865 :
866 : /*
867 : * Note: We deliberatly 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 0 : converted = talloc_array(mem_ctx, char, pathlen + insertlen + 1);
876 0 : if (converted == NULL) {
877 0 : goto fail;
878 : }
879 :
880 0 : if (path[pathlen-1] != '/') {
881 : /*
882 : * Append a fake slash to find the snapshot root
883 : */
884 : size_t *tmp;
885 0 : tmp = talloc_realloc(talloc_tos(), slashes,
886 : size_t, num_slashes+1);
887 0 : if (tmp == NULL) {
888 0 : goto fail;
889 : }
890 0 : slashes = tmp;
891 0 : slashes[num_slashes] = pathlen;
892 0 : num_slashes += 1;
893 : }
894 :
895 0 : min_offset = 0;
896 :
897 0 : if (!config->crossmountpoints) {
898 0 : min_offset = strlen(config->mount_point);
899 : }
900 :
901 0 : memcpy(converted, path, pathlen+1);
902 0 : converted[pathlen+insertlen] = '\0';
903 :
904 0 : converted_fname = (struct smb_filename) {
905 : .base_name = converted,
906 : };
907 :
908 0 : for (i = num_slashes-1; i>=0; i--) {
909 : int ret;
910 : size_t offset;
911 :
912 0 : offset = slashes[i];
913 :
914 0 : if (offset < min_offset) {
915 0 : errno = ENOENT;
916 0 : goto fail;
917 : }
918 :
919 0 : if (offset >= connectlen) {
920 0 : in_share_offset = offset;
921 : }
922 :
923 0 : memcpy(converted+offset, insert, insertlen);
924 :
925 0 : offset += insertlen;
926 0 : memcpy(converted+offset, path + slashes[i],
927 0 : pathlen - slashes[i]);
928 :
929 0 : ret = SMB_VFS_NEXT_LSTAT(handle, &converted_fname);
930 :
931 0 : DEBUG(10, ("Trying[snapdirseverywhere] %s: %d (%s)\n",
932 : converted,
933 : ret, ret == 0 ? "ok" : strerror(errno)));
934 0 : if (ret == 0) {
935 : /* success */
936 0 : if (snaproot_len != NULL) {
937 0 : *snaproot_len = in_share_offset + insertlen;
938 : }
939 0 : break;
940 : }
941 0 : 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 0 : continue;
948 : }
949 0 : if (errno != ENOENT) {
950 : /* Other problem than "not found" */
951 0 : goto fail;
952 : }
953 : }
954 :
955 0 : if (i >= 0) {
956 : /*
957 : * Found something
958 : */
959 0 : DEBUG(10, ("Found %s\n", converted));
960 0 : result = converted;
961 0 : converted = NULL;
962 : } else {
963 0 : errno = ENOENT;
964 : }
965 0 : fail:
966 0 : if (result == NULL) {
967 0 : saved_errno = errno;
968 : }
969 0 : TALLOC_FREE(converted);
970 0 : TALLOC_FREE(insert);
971 0 : TALLOC_FREE(slashes);
972 0 : TALLOC_FREE(path);
973 0 : if (saved_errno != 0) {
974 0 : errno = saved_errno;
975 : }
976 0 : 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 0 : static char *shadow_copy2_convert(TALLOC_CTX *mem_ctx,
985 : struct vfs_handle_struct *handle,
986 : const char *name, time_t timestamp)
987 : {
988 0 : 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 0 : 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 0 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1001 : return);
1002 :
1003 0 : 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 0 : TDB_DATA key = { .dptr = discard_const_p(uint8_t, fname),
1015 0 : .dsize = strlen(fname) };
1016 : uint32_t shash;
1017 :
1018 0 : shash = tdb_jenkins_hash(&key) & 0xFF000000;
1019 0 : if (shash == 0) {
1020 0 : shash = 1;
1021 : }
1022 0 : sbuf->st_ex_ino ^= shash;
1023 : }
1024 : }
1025 :
1026 0 : 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 0 : time_t timestamp_src = 0;
1033 0 : time_t timestamp_dst = 0;
1034 0 : char *snappath_src = NULL;
1035 0 : char *snappath_dst = NULL;
1036 :
1037 0 : if (!shadow_copy2_strip_snapshot_internal(talloc_tos(), handle,
1038 : smb_fname_src,
1039 : ×tamp_src, NULL, &snappath_src,
1040 : NULL)) {
1041 0 : return -1;
1042 : }
1043 0 : if (!shadow_copy2_strip_snapshot_internal(talloc_tos(), handle,
1044 : smb_fname_dst,
1045 : ×tamp_dst, NULL, &snappath_dst,
1046 : NULL)) {
1047 0 : return -1;
1048 : }
1049 0 : if (timestamp_src != 0) {
1050 0 : errno = EXDEV;
1051 0 : return -1;
1052 : }
1053 0 : if (timestamp_dst != 0) {
1054 0 : errno = EROFS;
1055 0 : return -1;
1056 : }
1057 : /*
1058 : * Don't allow rename on already converted paths.
1059 : */
1060 0 : if (snappath_src != NULL) {
1061 0 : errno = EXDEV;
1062 0 : return -1;
1063 : }
1064 0 : if (snappath_dst != NULL) {
1065 0 : errno = EROFS;
1066 0 : return -1;
1067 : }
1068 0 : return SMB_VFS_NEXT_RENAMEAT(handle,
1069 : srcfsp,
1070 : smb_fname_src,
1071 : dstfsp,
1072 : smb_fname_dst);
1073 : }
1074 :
1075 0 : 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 0 : time_t timestamp_old = 0;
1081 0 : time_t timestamp_new = 0;
1082 0 : char *snappath_old = NULL;
1083 0 : char *snappath_new = NULL;
1084 :
1085 0 : if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1086 : handle,
1087 : link_contents,
1088 : ×tamp_old,
1089 : NULL,
1090 : &snappath_old,
1091 : NULL)) {
1092 0 : return -1;
1093 : }
1094 0 : if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1095 : handle,
1096 : new_smb_fname,
1097 : ×tamp_new,
1098 : NULL,
1099 : &snappath_new,
1100 : NULL)) {
1101 0 : return -1;
1102 : }
1103 0 : if ((timestamp_old != 0) || (timestamp_new != 0)) {
1104 0 : errno = EROFS;
1105 0 : return -1;
1106 : }
1107 : /*
1108 : * Don't allow symlinks on already converted paths.
1109 : */
1110 0 : if ((snappath_old != NULL) || (snappath_new != NULL)) {
1111 0 : errno = EROFS;
1112 0 : return -1;
1113 : }
1114 0 : return SMB_VFS_NEXT_SYMLINKAT(handle,
1115 : link_contents,
1116 : dirfsp,
1117 : new_smb_fname);
1118 : }
1119 :
1120 0 : 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 0 : time_t timestamp_old = 0;
1128 0 : time_t timestamp_new = 0;
1129 0 : char *snappath_old = NULL;
1130 0 : char *snappath_new = NULL;
1131 :
1132 0 : if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1133 : handle,
1134 : old_smb_fname,
1135 : ×tamp_old,
1136 : NULL,
1137 : &snappath_old,
1138 : NULL)) {
1139 0 : return -1;
1140 : }
1141 0 : if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1142 : handle,
1143 : new_smb_fname,
1144 : ×tamp_new,
1145 : NULL,
1146 : &snappath_new,
1147 : NULL)) {
1148 0 : return -1;
1149 : }
1150 0 : if ((timestamp_old != 0) || (timestamp_new != 0)) {
1151 0 : errno = EROFS;
1152 0 : return -1;
1153 : }
1154 : /*
1155 : * Don't allow links on already converted paths.
1156 : */
1157 0 : if ((snappath_old != NULL) || (snappath_new != NULL)) {
1158 0 : errno = EROFS;
1159 0 : return -1;
1160 : }
1161 0 : return SMB_VFS_NEXT_LINKAT(handle,
1162 : srcfsp,
1163 : old_smb_fname,
1164 : dstfsp,
1165 : new_smb_fname,
1166 : flags);
1167 : }
1168 :
1169 0 : static int shadow_copy2_stat(vfs_handle_struct *handle,
1170 : struct smb_filename *smb_fname)
1171 : {
1172 0 : struct shadow_copy2_private *priv = NULL;
1173 0 : time_t timestamp = 0;
1174 0 : char *stripped = NULL;
1175 0 : bool converted = false;
1176 0 : char *abspath = NULL;
1177 : char *tmp;
1178 0 : int ret = 0;
1179 :
1180 0 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1181 : return -1);
1182 :
1183 0 : if (!shadow_copy2_strip_snapshot_converted(talloc_tos(),
1184 : handle,
1185 : smb_fname,
1186 : ×tamp,
1187 : &stripped,
1188 : &converted)) {
1189 0 : return -1;
1190 : }
1191 0 : if (timestamp == 0) {
1192 0 : TALLOC_FREE(stripped);
1193 0 : ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
1194 0 : if (ret != 0) {
1195 0 : return ret;
1196 : }
1197 0 : if (!converted) {
1198 0 : return 0;
1199 : }
1200 :
1201 0 : abspath = make_path_absolute(talloc_tos(),
1202 : priv,
1203 0 : smb_fname->base_name);
1204 0 : if (abspath == NULL) {
1205 0 : return -1;
1206 : }
1207 :
1208 0 : convert_sbuf(handle, abspath, &smb_fname->st);
1209 0 : TALLOC_FREE(abspath);
1210 0 : return 0;
1211 : }
1212 :
1213 0 : tmp = smb_fname->base_name;
1214 0 : smb_fname->base_name = shadow_copy2_convert(
1215 : talloc_tos(), handle, stripped, timestamp);
1216 0 : TALLOC_FREE(stripped);
1217 :
1218 0 : if (smb_fname->base_name == NULL) {
1219 0 : smb_fname->base_name = tmp;
1220 0 : return -1;
1221 : }
1222 :
1223 0 : ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
1224 0 : if (ret != 0) {
1225 0 : goto out;
1226 : }
1227 :
1228 0 : abspath = make_path_absolute(talloc_tos(),
1229 : priv,
1230 0 : smb_fname->base_name);
1231 0 : if (abspath == NULL) {
1232 0 : ret = -1;
1233 0 : goto out;
1234 : }
1235 :
1236 0 : convert_sbuf(handle, abspath, &smb_fname->st);
1237 0 : TALLOC_FREE(abspath);
1238 :
1239 0 : out:
1240 0 : TALLOC_FREE(smb_fname->base_name);
1241 0 : smb_fname->base_name = tmp;
1242 :
1243 0 : return ret;
1244 : }
1245 :
1246 0 : static int shadow_copy2_lstat(vfs_handle_struct *handle,
1247 : struct smb_filename *smb_fname)
1248 : {
1249 0 : struct shadow_copy2_private *priv = NULL;
1250 0 : time_t timestamp = 0;
1251 0 : char *stripped = NULL;
1252 0 : bool converted = false;
1253 0 : char *abspath = NULL;
1254 : char *tmp;
1255 0 : int ret = 0;
1256 :
1257 0 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1258 : return -1);
1259 :
1260 0 : if (!shadow_copy2_strip_snapshot_converted(talloc_tos(),
1261 : handle,
1262 : smb_fname,
1263 : ×tamp,
1264 : &stripped,
1265 : &converted)) {
1266 0 : return -1;
1267 : }
1268 0 : if (timestamp == 0) {
1269 0 : TALLOC_FREE(stripped);
1270 0 : ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
1271 0 : if (ret != 0) {
1272 0 : return ret;
1273 : }
1274 0 : if (!converted) {
1275 0 : return 0;
1276 : }
1277 :
1278 0 : abspath = make_path_absolute(talloc_tos(),
1279 : priv,
1280 0 : smb_fname->base_name);
1281 0 : if (abspath == NULL) {
1282 0 : return -1;
1283 : }
1284 :
1285 0 : convert_sbuf(handle, abspath, &smb_fname->st);
1286 0 : TALLOC_FREE(abspath);
1287 0 : return 0;
1288 : }
1289 :
1290 0 : tmp = smb_fname->base_name;
1291 0 : smb_fname->base_name = shadow_copy2_convert(
1292 : talloc_tos(), handle, stripped, timestamp);
1293 0 : TALLOC_FREE(stripped);
1294 :
1295 0 : if (smb_fname->base_name == NULL) {
1296 0 : smb_fname->base_name = tmp;
1297 0 : return -1;
1298 : }
1299 :
1300 0 : ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
1301 0 : if (ret != 0) {
1302 0 : goto out;
1303 : }
1304 :
1305 0 : abspath = make_path_absolute(talloc_tos(),
1306 : priv,
1307 0 : smb_fname->base_name);
1308 0 : if (abspath == NULL) {
1309 0 : ret = -1;
1310 0 : goto out;
1311 : }
1312 :
1313 0 : convert_sbuf(handle, abspath, &smb_fname->st);
1314 0 : TALLOC_FREE(abspath);
1315 :
1316 0 : out:
1317 0 : TALLOC_FREE(smb_fname->base_name);
1318 0 : smb_fname->base_name = tmp;
1319 :
1320 0 : return ret;
1321 : }
1322 :
1323 0 : static int shadow_copy2_fstat(vfs_handle_struct *handle, files_struct *fsp,
1324 : SMB_STRUCT_STAT *sbuf)
1325 : {
1326 0 : struct shadow_copy2_private *priv = NULL;
1327 0 : time_t timestamp = 0;
1328 0 : struct smb_filename *orig_smb_fname = NULL;
1329 : struct smb_filename vss_smb_fname;
1330 0 : struct smb_filename *orig_base_smb_fname = NULL;
1331 : struct smb_filename vss_base_smb_fname;
1332 0 : char *stripped = NULL;
1333 0 : char *abspath = NULL;
1334 0 : bool converted = false;
1335 : bool ok;
1336 : int ret;
1337 :
1338 0 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1339 : return -1);
1340 :
1341 0 : ok = shadow_copy2_strip_snapshot_converted(talloc_tos(),
1342 : handle,
1343 : fsp->fsp_name,
1344 : ×tamp,
1345 : &stripped,
1346 : &converted);
1347 0 : if (!ok) {
1348 0 : return -1;
1349 : }
1350 :
1351 0 : if (timestamp == 0) {
1352 0 : TALLOC_FREE(stripped);
1353 0 : ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
1354 0 : if (ret != 0) {
1355 0 : return ret;
1356 : }
1357 0 : if (!converted) {
1358 0 : return 0;
1359 : }
1360 :
1361 0 : abspath = make_path_absolute(talloc_tos(),
1362 : priv,
1363 0 : fsp->fsp_name->base_name);
1364 0 : if (abspath == NULL) {
1365 0 : return -1;
1366 : }
1367 :
1368 0 : convert_sbuf(handle, abspath, sbuf);
1369 0 : TALLOC_FREE(abspath);
1370 0 : return 0;
1371 : }
1372 :
1373 0 : vss_smb_fname = *fsp->fsp_name;
1374 0 : vss_smb_fname.base_name = shadow_copy2_convert(talloc_tos(),
1375 : handle,
1376 : stripped,
1377 : timestamp);
1378 0 : TALLOC_FREE(stripped);
1379 0 : if (vss_smb_fname.base_name == NULL) {
1380 0 : return -1;
1381 : }
1382 :
1383 0 : orig_smb_fname = fsp->fsp_name;
1384 0 : fsp->fsp_name = &vss_smb_fname;
1385 :
1386 0 : if (fsp_is_alternate_stream(fsp)) {
1387 0 : vss_base_smb_fname = *fsp->base_fsp->fsp_name;
1388 0 : vss_base_smb_fname.base_name = vss_smb_fname.base_name;
1389 0 : orig_base_smb_fname = fsp->base_fsp->fsp_name;
1390 0 : fsp->base_fsp->fsp_name = &vss_base_smb_fname;
1391 : }
1392 :
1393 0 : ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
1394 0 : if (ret != 0) {
1395 0 : goto out;
1396 : }
1397 :
1398 0 : abspath = make_path_absolute(talloc_tos(),
1399 : priv,
1400 0 : fsp->fsp_name->base_name);
1401 0 : if (abspath == NULL) {
1402 0 : ret = -1;
1403 0 : goto out;
1404 : }
1405 :
1406 0 : convert_sbuf(handle, abspath, sbuf);
1407 0 : TALLOC_FREE(abspath);
1408 :
1409 0 : out:
1410 0 : fsp->fsp_name = orig_smb_fname;
1411 0 : if (fsp_is_alternate_stream(fsp)) {
1412 0 : fsp->base_fsp->fsp_name = orig_base_smb_fname;
1413 : }
1414 :
1415 0 : return ret;
1416 : }
1417 :
1418 0 : 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 0 : struct shadow_copy2_private *priv = NULL;
1426 0 : struct smb_filename *smb_fname = NULL;
1427 0 : time_t timestamp = 0;
1428 0 : char *stripped = NULL;
1429 0 : char *abspath = NULL;
1430 0 : bool converted = false;
1431 : int ret;
1432 : bool ok;
1433 :
1434 0 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1435 : return -1);
1436 :
1437 0 : smb_fname = full_path_from_dirfsp_atname(talloc_tos(),
1438 : dirfsp,
1439 : smb_fname_in);
1440 0 : if (smb_fname == NULL) {
1441 0 : errno = ENOMEM;
1442 0 : return -1;
1443 : }
1444 :
1445 0 : ok = shadow_copy2_strip_snapshot_converted(talloc_tos(),
1446 : handle,
1447 : smb_fname,
1448 : ×tamp,
1449 : &stripped,
1450 : &converted);
1451 0 : if (!ok) {
1452 0 : return -1;
1453 : }
1454 0 : if (timestamp == 0) {
1455 0 : TALLOC_FREE(stripped);
1456 0 : ret = SMB_VFS_NEXT_FSTATAT(
1457 : handle, dirfsp, smb_fname_in, sbuf, flags);
1458 0 : if (ret != 0) {
1459 0 : return ret;
1460 : }
1461 0 : if (!converted) {
1462 0 : return 0;
1463 : }
1464 :
1465 0 : abspath = make_path_absolute(
1466 0 : talloc_tos(), priv, smb_fname->base_name);
1467 0 : if (abspath == NULL) {
1468 0 : errno = ENOMEM;
1469 0 : return -1;
1470 : }
1471 :
1472 0 : convert_sbuf(handle, abspath, sbuf);
1473 0 : TALLOC_FREE(abspath);
1474 0 : return 0;
1475 : }
1476 :
1477 0 : smb_fname->base_name = shadow_copy2_convert(
1478 : smb_fname, handle, stripped, timestamp);
1479 0 : TALLOC_FREE(stripped);
1480 0 : if (smb_fname->base_name == NULL) {
1481 0 : TALLOC_FREE(smb_fname);
1482 0 : errno = ENOMEM;
1483 0 : return -1;
1484 : }
1485 :
1486 0 : ret = SMB_VFS_NEXT_FSTATAT(handle,
1487 : dirfsp,
1488 : smb_fname,
1489 : sbuf,
1490 : flags);
1491 0 : if (ret != 0) {
1492 0 : int saved_errno = errno;
1493 0 : TALLOC_FREE(smb_fname);
1494 0 : errno = saved_errno;
1495 0 : return -1;
1496 : }
1497 :
1498 0 : abspath = make_path_absolute(
1499 0 : talloc_tos(), priv, smb_fname->base_name);
1500 0 : if (abspath == NULL) {
1501 0 : TALLOC_FREE(smb_fname);
1502 0 : errno = ENOMEM;
1503 0 : return -1;
1504 : }
1505 :
1506 0 : convert_sbuf(handle, abspath, sbuf);
1507 0 : TALLOC_FREE(abspath);
1508 :
1509 0 : TALLOC_FREE(smb_fname);
1510 :
1511 0 : return 0;
1512 : }
1513 :
1514 0 : 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 0 : struct smb_filename *result = NULL;
1521 :
1522 0 : if (fsp->base_fsp != NULL) {
1523 0 : struct smb_filename *base_fname = fsp->base_fsp->fsp_name;
1524 :
1525 0 : if (smb_fname_in->base_name[0] == '/') {
1526 : /*
1527 : * Special-case stream names from streams_depot
1528 : */
1529 0 : result = cp_smb_filename(mem_ctx, smb_fname_in);
1530 : } else {
1531 :
1532 0 : SMB_ASSERT(is_named_stream(smb_fname_in));
1533 :
1534 0 : result = synthetic_smb_fname(mem_ctx,
1535 0 : base_fname->base_name,
1536 0 : smb_fname_in->stream_name,
1537 : &smb_fname_in->st,
1538 0 : smb_fname_in->twrp,
1539 0 : smb_fname_in->flags);
1540 : }
1541 : } else {
1542 0 : result = full_path_from_dirfsp_atname(
1543 : mem_ctx, dirfsp, smb_fname_in);
1544 : }
1545 :
1546 0 : return result;
1547 : }
1548 :
1549 0 : 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 0 : struct vfs_open_how how = *_how;
1556 0 : struct smb_filename *smb_fname = NULL;
1557 0 : time_t timestamp = 0;
1558 0 : char *stripped = NULL;
1559 0 : int saved_errno = 0;
1560 : int ret;
1561 : bool ok;
1562 :
1563 0 : if (how.resolve != 0) {
1564 0 : errno = ENOSYS;
1565 0 : return -1;
1566 : }
1567 :
1568 0 : smb_fname = shadow_copy2_openat_name(
1569 : talloc_tos(), dirfsp, fsp, smb_fname_in);
1570 0 : if (smb_fname == NULL) {
1571 0 : errno = ENOMEM;
1572 0 : return -1;
1573 : }
1574 :
1575 0 : ok = shadow_copy2_strip_snapshot(talloc_tos(),
1576 : handle,
1577 : smb_fname,
1578 : ×tamp,
1579 : &stripped);
1580 0 : if (!ok) {
1581 0 : return -1;
1582 : }
1583 0 : if (timestamp == 0) {
1584 0 : return SMB_VFS_NEXT_OPENAT(handle,
1585 : dirfsp,
1586 : smb_fname_in,
1587 : fsp,
1588 : &how);
1589 : }
1590 :
1591 0 : smb_fname->base_name = shadow_copy2_convert(smb_fname,
1592 : handle,
1593 : stripped,
1594 : timestamp);
1595 0 : if (smb_fname->base_name == NULL) {
1596 0 : int err = errno;
1597 0 : TALLOC_FREE(stripped);
1598 0 : TALLOC_FREE(smb_fname);
1599 0 : errno = err;
1600 0 : return -1;
1601 : }
1602 0 : TALLOC_FREE(stripped);
1603 :
1604 0 : ret = SMB_VFS_NEXT_OPENAT(handle,
1605 : dirfsp,
1606 : smb_fname,
1607 : fsp,
1608 : &how);
1609 0 : if (ret == -1) {
1610 0 : saved_errno = errno;
1611 : }
1612 :
1613 0 : TALLOC_FREE(smb_fname);
1614 :
1615 0 : if (saved_errno != 0) {
1616 0 : errno = saved_errno;
1617 : }
1618 0 : return ret;
1619 : }
1620 :
1621 0 : static int shadow_copy2_unlinkat(vfs_handle_struct *handle,
1622 : struct files_struct *dirfsp,
1623 : const struct smb_filename *smb_fname,
1624 : int flags)
1625 : {
1626 0 : time_t timestamp = 0;
1627 :
1628 0 : if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1629 : smb_fname,
1630 : ×tamp, NULL)) {
1631 0 : return -1;
1632 : }
1633 0 : if (timestamp != 0) {
1634 0 : errno = EROFS;
1635 0 : return -1;
1636 : }
1637 0 : return SMB_VFS_NEXT_UNLINKAT(handle,
1638 : dirfsp,
1639 : smb_fname,
1640 : flags);
1641 : }
1642 :
1643 0 : static int shadow_copy2_fchmod(vfs_handle_struct *handle,
1644 : struct files_struct *fsp,
1645 : mode_t mode)
1646 : {
1647 0 : time_t timestamp = 0;
1648 0 : const struct smb_filename *smb_fname = NULL;
1649 :
1650 0 : smb_fname = fsp->fsp_name;
1651 0 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
1652 : handle,
1653 : smb_fname,
1654 : ×tamp,
1655 : NULL)) {
1656 0 : return -1;
1657 : }
1658 0 : if (timestamp != 0) {
1659 0 : errno = EROFS;
1660 0 : return -1;
1661 : }
1662 0 : return SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
1663 : }
1664 :
1665 0 : static void store_cwd_data(vfs_handle_struct *handle,
1666 : const char *connectpath)
1667 : {
1668 0 : struct shadow_copy2_private *priv = NULL;
1669 0 : struct smb_filename *cwd_fname = NULL;
1670 :
1671 0 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1672 : return);
1673 :
1674 0 : TALLOC_FREE(priv->shadow_cwd);
1675 0 : cwd_fname = SMB_VFS_NEXT_GETWD(handle, talloc_tos());
1676 0 : if (cwd_fname == NULL) {
1677 0 : smb_panic("getwd failed\n");
1678 : }
1679 0 : DBG_DEBUG("shadow cwd = %s\n", cwd_fname->base_name);
1680 0 : priv->shadow_cwd = talloc_strdup(priv, cwd_fname->base_name);
1681 0 : TALLOC_FREE(cwd_fname);
1682 0 : if (priv->shadow_cwd == NULL) {
1683 0 : smb_panic("talloc failed\n");
1684 : }
1685 0 : TALLOC_FREE(priv->shadow_connectpath);
1686 0 : if (connectpath) {
1687 0 : DBG_DEBUG("shadow connectpath = %s\n", connectpath);
1688 0 : priv->shadow_connectpath = talloc_strdup(priv, connectpath);
1689 0 : if (priv->shadow_connectpath == NULL) {
1690 0 : smb_panic("talloc failed\n");
1691 : }
1692 : }
1693 : }
1694 :
1695 0 : static int shadow_copy2_chdir(vfs_handle_struct *handle,
1696 : const struct smb_filename *smb_fname)
1697 : {
1698 0 : time_t timestamp = 0;
1699 0 : char *stripped = NULL;
1700 0 : char *snappath = NULL;
1701 0 : int ret = -1;
1702 0 : int saved_errno = 0;
1703 0 : char *conv = NULL;
1704 0 : size_t rootpath_len = 0;
1705 0 : struct smb_filename *conv_smb_fname = NULL;
1706 :
1707 0 : if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1708 : handle,
1709 : smb_fname,
1710 : ×tamp,
1711 : &stripped,
1712 : &snappath,
1713 : NULL)) {
1714 0 : return -1;
1715 : }
1716 0 : if (stripped != NULL) {
1717 0 : conv = shadow_copy2_do_convert(talloc_tos(),
1718 : handle,
1719 : stripped,
1720 : timestamp,
1721 : &rootpath_len);
1722 0 : TALLOC_FREE(stripped);
1723 0 : if (conv == NULL) {
1724 0 : return -1;
1725 : }
1726 0 : conv_smb_fname = synthetic_smb_fname(talloc_tos(),
1727 : conv,
1728 : NULL,
1729 : NULL,
1730 : 0,
1731 0 : smb_fname->flags);
1732 : } else {
1733 0 : conv_smb_fname = cp_smb_filename(talloc_tos(), smb_fname);
1734 : }
1735 :
1736 0 : if (conv_smb_fname == NULL) {
1737 0 : TALLOC_FREE(conv);
1738 0 : errno = ENOMEM;
1739 0 : return -1;
1740 : }
1741 :
1742 0 : ret = SMB_VFS_NEXT_CHDIR(handle, conv_smb_fname);
1743 0 : if (ret == -1) {
1744 0 : saved_errno = errno;
1745 : }
1746 :
1747 0 : if (ret == 0) {
1748 0 : if (conv != NULL && rootpath_len != 0) {
1749 0 : conv[rootpath_len] = '\0';
1750 0 : } else if (snappath != 0) {
1751 0 : TALLOC_FREE(conv);
1752 0 : conv = snappath;
1753 : }
1754 0 : store_cwd_data(handle, conv);
1755 : }
1756 :
1757 0 : TALLOC_FREE(stripped);
1758 0 : TALLOC_FREE(conv);
1759 0 : TALLOC_FREE(conv_smb_fname);
1760 :
1761 0 : if (saved_errno != 0) {
1762 0 : errno = saved_errno;
1763 : }
1764 0 : return ret;
1765 : }
1766 :
1767 0 : static int shadow_copy2_fntimes(vfs_handle_struct *handle,
1768 : files_struct *fsp,
1769 : struct smb_file_time *ft)
1770 : {
1771 0 : time_t timestamp = 0;
1772 :
1773 0 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
1774 : handle,
1775 : fsp->fsp_name,
1776 : ×tamp,
1777 : NULL)) {
1778 0 : return -1;
1779 : }
1780 0 : if (timestamp != 0) {
1781 0 : errno = EROFS;
1782 0 : return -1;
1783 : }
1784 0 : return SMB_VFS_NEXT_FNTIMES(handle, fsp, ft);
1785 : }
1786 :
1787 0 : static int shadow_copy2_readlinkat(vfs_handle_struct *handle,
1788 : const struct files_struct *dirfsp,
1789 : const struct smb_filename *smb_fname,
1790 : char *buf,
1791 : size_t bufsiz)
1792 : {
1793 0 : time_t timestamp = 0;
1794 0 : char *stripped = NULL;
1795 0 : int saved_errno = 0;
1796 : int ret;
1797 0 : struct smb_filename *full_fname = NULL;
1798 0 : struct smb_filename *conv = NULL;
1799 :
1800 0 : full_fname = full_path_from_dirfsp_atname(talloc_tos(),
1801 : dirfsp,
1802 : smb_fname);
1803 0 : if (full_fname == NULL) {
1804 0 : errno = ENOMEM;
1805 0 : return -1;
1806 : }
1807 :
1808 0 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
1809 : handle,
1810 : full_fname,
1811 : ×tamp,
1812 : &stripped)) {
1813 0 : TALLOC_FREE(full_fname);
1814 0 : return -1;
1815 : }
1816 :
1817 0 : if (timestamp == 0) {
1818 0 : TALLOC_FREE(full_fname);
1819 0 : TALLOC_FREE(stripped);
1820 0 : return SMB_VFS_NEXT_READLINKAT(handle,
1821 : dirfsp,
1822 : smb_fname,
1823 : buf,
1824 : bufsiz);
1825 : }
1826 0 : conv = cp_smb_filename(talloc_tos(), full_fname);
1827 0 : if (conv == NULL) {
1828 0 : TALLOC_FREE(full_fname);
1829 0 : TALLOC_FREE(stripped);
1830 0 : errno = ENOMEM;
1831 0 : return -1;
1832 : }
1833 0 : TALLOC_FREE(full_fname);
1834 0 : conv->base_name = shadow_copy2_convert(
1835 : conv, handle, stripped, timestamp);
1836 0 : TALLOC_FREE(stripped);
1837 0 : if (conv->base_name == NULL) {
1838 0 : return -1;
1839 : }
1840 0 : ret = SMB_VFS_NEXT_READLINKAT(handle,
1841 : handle->conn->cwd_fsp,
1842 : conv,
1843 : buf,
1844 : bufsiz);
1845 0 : if (ret == -1) {
1846 0 : saved_errno = errno;
1847 : }
1848 0 : TALLOC_FREE(conv);
1849 0 : if (saved_errno != 0) {
1850 0 : errno = saved_errno;
1851 : }
1852 0 : return ret;
1853 : }
1854 :
1855 0 : static int shadow_copy2_mknodat(vfs_handle_struct *handle,
1856 : files_struct *dirfsp,
1857 : const struct smb_filename *smb_fname,
1858 : mode_t mode,
1859 : SMB_DEV_T dev)
1860 : {
1861 0 : time_t timestamp = 0;
1862 :
1863 0 : if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1864 : smb_fname,
1865 : ×tamp, NULL)) {
1866 0 : return -1;
1867 : }
1868 0 : if (timestamp != 0) {
1869 0 : errno = EROFS;
1870 0 : return -1;
1871 : }
1872 0 : return SMB_VFS_NEXT_MKNODAT(handle,
1873 : dirfsp,
1874 : smb_fname,
1875 : mode,
1876 : dev);
1877 : }
1878 :
1879 0 : static struct smb_filename *shadow_copy2_realpath(vfs_handle_struct *handle,
1880 : TALLOC_CTX *ctx,
1881 : const struct smb_filename *smb_fname)
1882 : {
1883 0 : time_t timestamp = 0;
1884 0 : char *stripped = NULL;
1885 0 : struct smb_filename *result_fname = NULL;
1886 0 : struct smb_filename *conv_fname = NULL;
1887 0 : int saved_errno = 0;
1888 :
1889 0 : if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1890 : smb_fname,
1891 : ×tamp, &stripped)) {
1892 0 : goto done;
1893 : }
1894 0 : if (timestamp == 0) {
1895 0 : return SMB_VFS_NEXT_REALPATH(handle, ctx, smb_fname);
1896 : }
1897 :
1898 0 : conv_fname = cp_smb_filename(talloc_tos(), smb_fname);
1899 0 : if (conv_fname == NULL) {
1900 0 : goto done;
1901 : }
1902 0 : conv_fname->base_name = shadow_copy2_convert(
1903 : conv_fname, handle, stripped, timestamp);
1904 0 : if (conv_fname->base_name == NULL) {
1905 0 : goto done;
1906 : }
1907 :
1908 0 : result_fname = SMB_VFS_NEXT_REALPATH(handle, ctx, conv_fname);
1909 :
1910 0 : done:
1911 0 : if (result_fname == NULL) {
1912 0 : saved_errno = errno;
1913 : }
1914 0 : TALLOC_FREE(conv_fname);
1915 0 : TALLOC_FREE(stripped);
1916 0 : if (saved_errno != 0) {
1917 0 : errno = saved_errno;
1918 : }
1919 0 : return result_fname;
1920 : }
1921 :
1922 : /**
1923 : * Check whether a given directory contains a
1924 : * snapshot directory as direct subdirectory.
1925 : * If yes, return the path of the snapshot-subdir,
1926 : * otherwise return NULL.
1927 : */
1928 0 : static char *have_snapdir(struct vfs_handle_struct *handle,
1929 : TALLOC_CTX *mem_ctx,
1930 : const char *path)
1931 : {
1932 : struct smb_filename smb_fname;
1933 : int ret;
1934 : struct shadow_copy2_private *priv;
1935 :
1936 0 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1937 : return NULL);
1938 :
1939 0 : smb_fname = (struct smb_filename) {
1940 0 : .base_name = talloc_asprintf(
1941 0 : mem_ctx, "%s/%s", path, priv->config->snapdir),
1942 : };
1943 0 : if (smb_fname.base_name == NULL) {
1944 0 : return NULL;
1945 : }
1946 :
1947 0 : ret = SMB_VFS_NEXT_STAT(handle, &smb_fname);
1948 0 : if ((ret == 0) && (S_ISDIR(smb_fname.st.st_ex_mode))) {
1949 0 : return smb_fname.base_name;
1950 : }
1951 0 : TALLOC_FREE(smb_fname.base_name);
1952 0 : return NULL;
1953 : }
1954 :
1955 : /**
1956 : * Find the snapshot directory (if any) for the given
1957 : * filename (which is relative to the share).
1958 : */
1959 0 : static const char *shadow_copy2_find_snapdir(TALLOC_CTX *mem_ctx,
1960 : struct vfs_handle_struct *handle,
1961 : struct smb_filename *smb_fname)
1962 : {
1963 : char *path, *p;
1964 : const char *snapdir;
1965 : struct shadow_copy2_config *config;
1966 : struct shadow_copy2_private *priv;
1967 :
1968 0 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1969 : return NULL);
1970 :
1971 0 : config = priv->config;
1972 :
1973 : /*
1974 : * If the non-snapdisrseverywhere mode, we should not search!
1975 : */
1976 0 : if (!config->snapdirseverywhere) {
1977 0 : return config->snapshot_basepath;
1978 : }
1979 :
1980 0 : path = talloc_asprintf(mem_ctx, "%s/%s",
1981 0 : handle->conn->connectpath,
1982 : smb_fname->base_name);
1983 0 : if (path == NULL) {
1984 0 : return NULL;
1985 : }
1986 :
1987 0 : snapdir = have_snapdir(handle, talloc_tos(), path);
1988 0 : if (snapdir != NULL) {
1989 0 : TALLOC_FREE(path);
1990 0 : return snapdir;
1991 : }
1992 :
1993 0 : while ((p = strrchr(path, '/')) && (p > path)) {
1994 :
1995 0 : p[0] = '\0';
1996 :
1997 0 : snapdir = have_snapdir(handle, talloc_tos(), path);
1998 0 : if (snapdir != NULL) {
1999 0 : TALLOC_FREE(path);
2000 0 : return snapdir;
2001 : }
2002 : }
2003 0 : TALLOC_FREE(path);
2004 0 : return NULL;
2005 : }
2006 :
2007 0 : static bool shadow_copy2_snapshot_to_gmt(vfs_handle_struct *handle,
2008 : const char *name,
2009 : char *gmt, size_t gmt_len)
2010 : {
2011 0 : struct tm timestamp = { .tm_sec = 0, };
2012 : time_t timestamp_t;
2013 : unsigned long int timestamp_long;
2014 : const char *fmt;
2015 : struct shadow_copy2_config *config;
2016 : struct shadow_copy2_private *priv;
2017 0 : char *tmpstr = NULL;
2018 0 : char *tmp = NULL;
2019 0 : bool converted = false;
2020 0 : int ret = -1;
2021 :
2022 0 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2023 : return NULL);
2024 :
2025 0 : config = priv->config;
2026 :
2027 0 : fmt = config->gmt_format;
2028 :
2029 : /*
2030 : * If regex is provided, then we will have to parse the
2031 : * filename which will contain both the prefix and the time format.
2032 : * e.g. <prefix><delimiter><time_format>
2033 : */
2034 0 : if (priv->snaps->regex != NULL) {
2035 0 : tmpstr = talloc_strdup(talloc_tos(), name);
2036 : /* point "name" to the time format */
2037 0 : name = strstr(name, priv->config->delimiter);
2038 0 : if (name == NULL) {
2039 0 : goto done;
2040 : }
2041 : /* Extract the prefix */
2042 0 : tmp = strstr(tmpstr, priv->config->delimiter);
2043 0 : if (tmp == NULL) {
2044 0 : goto done;
2045 : }
2046 0 : *tmp = '\0';
2047 :
2048 : /* Parse regex */
2049 0 : ret = regexec(priv->snaps->regex, tmpstr, 0, NULL, 0);
2050 0 : if (ret) {
2051 0 : DBG_DEBUG("shadow_copy2_snapshot_to_gmt: "
2052 : "no regex match for %s\n", tmpstr);
2053 0 : goto done;
2054 : }
2055 : }
2056 :
2057 0 : if (config->use_sscanf) {
2058 0 : if (sscanf(name, fmt, ×tamp_long) != 1) {
2059 0 : DEBUG(10, ("shadow_copy2_snapshot_to_gmt: "
2060 : "no sscanf match %s: %s\n",
2061 : fmt, name));
2062 0 : goto done;
2063 : }
2064 0 : timestamp_t = timestamp_long;
2065 0 : gmtime_r(×tamp_t, ×tamp);
2066 : } else {
2067 0 : if (strptime(name, fmt, ×tamp) == NULL) {
2068 0 : DEBUG(10, ("shadow_copy2_snapshot_to_gmt: "
2069 : "no match %s: %s\n",
2070 : fmt, name));
2071 0 : goto done;
2072 : }
2073 0 : DEBUG(10, ("shadow_copy2_snapshot_to_gmt: match %s: %s\n",
2074 : fmt, name));
2075 :
2076 0 : if (config->use_localtime) {
2077 0 : timestamp.tm_isdst = -1;
2078 0 : timestamp_t = mktime(×tamp);
2079 0 : gmtime_r(×tamp_t, ×tamp);
2080 : }
2081 : }
2082 :
2083 0 : strftime(gmt, gmt_len, GMT_FORMAT, ×tamp);
2084 0 : converted = true;
2085 :
2086 0 : done:
2087 0 : TALLOC_FREE(tmpstr);
2088 0 : return converted;
2089 : }
2090 :
2091 0 : static int shadow_copy2_label_cmp_asc(const void *x, const void *y)
2092 : {
2093 0 : return strncmp((const char *)x, (const char *)y, sizeof(SHADOW_COPY_LABEL));
2094 : }
2095 :
2096 0 : static int shadow_copy2_label_cmp_desc(const void *x, const void *y)
2097 : {
2098 0 : return -strncmp((const char *)x, (const char *)y, sizeof(SHADOW_COPY_LABEL));
2099 : }
2100 :
2101 : /*
2102 : sort the shadow copy data in ascending or descending order
2103 : */
2104 0 : static void shadow_copy2_sort_data(vfs_handle_struct *handle,
2105 : struct shadow_copy_data *shadow_copy2_data)
2106 : {
2107 : int (*cmpfunc)(const void *, const void *);
2108 : const char *sort;
2109 : struct shadow_copy2_private *priv;
2110 :
2111 0 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2112 : return);
2113 :
2114 0 : sort = priv->config->sort_order;
2115 0 : if (sort == NULL) {
2116 0 : return;
2117 : }
2118 :
2119 0 : if (strcmp(sort, "asc") == 0) {
2120 0 : cmpfunc = shadow_copy2_label_cmp_asc;
2121 0 : } else if (strcmp(sort, "desc") == 0) {
2122 0 : cmpfunc = shadow_copy2_label_cmp_desc;
2123 : } else {
2124 0 : return;
2125 : }
2126 :
2127 0 : if (shadow_copy2_data && shadow_copy2_data->num_volumes > 0 &&
2128 0 : shadow_copy2_data->labels)
2129 : {
2130 0 : TYPESAFE_QSORT(shadow_copy2_data->labels,
2131 : shadow_copy2_data->num_volumes,
2132 : cmpfunc);
2133 : }
2134 : }
2135 :
2136 0 : static int shadow_copy2_get_shadow_copy_data(
2137 : vfs_handle_struct *handle, files_struct *fsp,
2138 : struct shadow_copy_data *shadow_copy2_data,
2139 : bool labels)
2140 : {
2141 0 : DIR *p = NULL;
2142 : const char *snapdir;
2143 0 : struct smb_filename *snapdir_smb_fname = NULL;
2144 0 : struct files_struct *dirfsp = NULL;
2145 0 : struct files_struct *fspcwd = NULL;
2146 : struct dirent *d;
2147 0 : TALLOC_CTX *tmp_ctx = talloc_stackframe();
2148 0 : struct shadow_copy2_private *priv = NULL;
2149 0 : struct shadow_copy2_snapentry *tmpentry = NULL;
2150 0 : bool get_snaplist = false;
2151 0 : struct vfs_open_how how = {
2152 : .flags = O_RDONLY, .mode = 0,
2153 : };
2154 : int fd;
2155 0 : int ret = -1;
2156 : NTSTATUS status;
2157 0 : int saved_errno = 0;
2158 :
2159 0 : snapdir = shadow_copy2_find_snapdir(tmp_ctx, handle, fsp->fsp_name);
2160 0 : if (snapdir == NULL) {
2161 0 : DEBUG(0,("shadow:snapdir not found for %s in get_shadow_copy_data\n",
2162 : handle->conn->connectpath));
2163 0 : errno = EINVAL;
2164 0 : goto done;
2165 : }
2166 :
2167 0 : snapdir_smb_fname = synthetic_smb_fname(talloc_tos(),
2168 : snapdir,
2169 : NULL,
2170 : NULL,
2171 : 0,
2172 0 : fsp->fsp_name->flags);
2173 0 : if (snapdir_smb_fname == NULL) {
2174 0 : errno = ENOMEM;
2175 0 : goto done;
2176 : }
2177 :
2178 0 : status = create_internal_dirfsp(handle->conn,
2179 : snapdir_smb_fname,
2180 : &dirfsp);
2181 0 : if (!NT_STATUS_IS_OK(status)) {
2182 0 : DBG_WARNING("create_internal_dir_fsp() failed for '%s'"
2183 : " - %s\n", snapdir, nt_errstr(status));
2184 0 : errno = ENOSYS;
2185 0 : goto done;
2186 : }
2187 :
2188 0 : status = vfs_at_fspcwd(talloc_tos(), handle->conn, &fspcwd);
2189 0 : if (!NT_STATUS_IS_OK(status)) {
2190 0 : errno = ENOMEM;
2191 0 : goto done;
2192 : }
2193 :
2194 : #ifdef O_DIRECTORY
2195 0 : how.flags |= O_DIRECTORY;
2196 : #endif
2197 :
2198 0 : fd = SMB_VFS_NEXT_OPENAT(handle,
2199 : fspcwd,
2200 : snapdir_smb_fname,
2201 : dirfsp,
2202 : &how);
2203 0 : if (fd == -1) {
2204 0 : DBG_WARNING("SMB_VFS_NEXT_OPEN failed for '%s'"
2205 : " - %s\n", snapdir, strerror(errno));
2206 0 : errno = ENOSYS;
2207 0 : goto done;
2208 : }
2209 0 : fsp_set_fd(dirfsp, fd);
2210 :
2211 : /* Now we have the handle, check access here. */
2212 0 : status = smbd_check_access_rights_fsp(fspcwd,
2213 : dirfsp,
2214 : false,
2215 : SEC_DIR_LIST);
2216 0 : if (!NT_STATUS_IS_OK(status)) {
2217 0 : DBG_ERR("user does not have list permission "
2218 : "on snapdir %s\n",
2219 : fsp_str_dbg(dirfsp));
2220 0 : errno = EACCES;
2221 0 : goto done;
2222 : }
2223 :
2224 0 : p = SMB_VFS_NEXT_FDOPENDIR(handle, dirfsp, NULL, 0);
2225 0 : if (!p) {
2226 0 : DBG_NOTICE("shadow_copy2: SMB_VFS_NEXT_FDOPENDIR() failed for '%s'"
2227 : " - %s\n", snapdir, strerror(errno));
2228 0 : errno = ENOSYS;
2229 0 : goto done;
2230 : }
2231 :
2232 0 : if (shadow_copy2_data != NULL) {
2233 0 : shadow_copy2_data->num_volumes = 0;
2234 0 : shadow_copy2_data->labels = NULL;
2235 : }
2236 :
2237 0 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2238 : goto done);
2239 :
2240 : /*
2241 : * Normally this function is called twice once with labels = false and
2242 : * then with labels = true. When labels is false it will return the
2243 : * number of volumes so that the caller can allocate memory for that
2244 : * many labels. Therefore to eliminate snaplist both the times it is
2245 : * good to check if labels is set or not.
2246 : *
2247 : * shadow_copy2_data is NULL when we only want to update the list and
2248 : * don't want any labels.
2249 : */
2250 0 : if ((priv->snaps->regex != NULL) && (labels || shadow_copy2_data == NULL)) {
2251 0 : get_snaplist = true;
2252 : /* Reset the global snaplist */
2253 0 : shadow_copy2_delete_snaplist(priv);
2254 :
2255 : /* Set the current time as snaplist update time */
2256 0 : time(&(priv->snaps->fetch_time));
2257 : }
2258 :
2259 0 : while ((d = SMB_VFS_NEXT_READDIR(handle, dirfsp, p, NULL))) {
2260 : char snapshot[GMT_NAME_LEN+1];
2261 : SHADOW_COPY_LABEL *tlabels;
2262 :
2263 : /*
2264 : * ignore names not of the right form in the snapshot
2265 : * directory
2266 : */
2267 0 : if (!shadow_copy2_snapshot_to_gmt(
2268 0 : handle, d->d_name,
2269 : snapshot, sizeof(snapshot))) {
2270 :
2271 0 : DEBUG(6, ("shadow_copy2_get_shadow_copy_data: "
2272 : "ignoring %s\n", d->d_name));
2273 0 : continue;
2274 : }
2275 0 : DEBUG(6,("shadow_copy2_get_shadow_copy_data: %s -> %s\n",
2276 : d->d_name, snapshot));
2277 :
2278 0 : if (get_snaplist) {
2279 : /*
2280 : * Create a snap entry for each successful
2281 : * pattern match.
2282 : */
2283 0 : tmpentry = shadow_copy2_create_snapentry(priv);
2284 0 : if (tmpentry == NULL) {
2285 0 : DBG_ERR("talloc_zero() failed\n");
2286 0 : goto done;
2287 : }
2288 0 : tmpentry->snapname = talloc_strdup(tmpentry, d->d_name);
2289 0 : tmpentry->time_fmt = talloc_strdup(tmpentry, snapshot);
2290 : }
2291 :
2292 0 : if (shadow_copy2_data == NULL) {
2293 0 : continue;
2294 : }
2295 :
2296 0 : if (!labels) {
2297 : /* the caller doesn't want the labels */
2298 0 : shadow_copy2_data->num_volumes++;
2299 0 : continue;
2300 : }
2301 :
2302 0 : tlabels = talloc_realloc(shadow_copy2_data,
2303 : shadow_copy2_data->labels,
2304 : SHADOW_COPY_LABEL,
2305 : shadow_copy2_data->num_volumes+1);
2306 0 : if (tlabels == NULL) {
2307 0 : DEBUG(0,("shadow_copy2: out of memory\n"));
2308 0 : goto done;
2309 : }
2310 :
2311 0 : strlcpy(tlabels[shadow_copy2_data->num_volumes], snapshot,
2312 : sizeof(*tlabels));
2313 :
2314 0 : shadow_copy2_data->num_volumes++;
2315 0 : shadow_copy2_data->labels = tlabels;
2316 : }
2317 :
2318 0 : shadow_copy2_sort_data(handle, shadow_copy2_data);
2319 0 : ret = 0;
2320 :
2321 0 : done:
2322 0 : if (ret != 0) {
2323 0 : saved_errno = errno;
2324 : }
2325 0 : TALLOC_FREE(fspcwd );
2326 0 : if (p != NULL) {
2327 0 : SMB_VFS_NEXT_CLOSEDIR(handle, p);
2328 0 : p = NULL;
2329 0 : if (dirfsp != NULL) {
2330 : /*
2331 : * VFS_CLOSEDIR implicitly
2332 : * closed the associated fd.
2333 : */
2334 0 : fsp_set_fd(dirfsp, -1);
2335 : }
2336 : }
2337 0 : if (dirfsp != NULL) {
2338 0 : fd_close(dirfsp);
2339 0 : file_free(NULL, dirfsp);
2340 : }
2341 0 : TALLOC_FREE(tmp_ctx);
2342 0 : if (saved_errno != 0) {
2343 0 : errno = saved_errno;
2344 : }
2345 0 : return ret;
2346 : }
2347 :
2348 0 : static int shadow_copy2_mkdirat(vfs_handle_struct *handle,
2349 : struct files_struct *dirfsp,
2350 : const struct smb_filename *smb_fname,
2351 : mode_t mode)
2352 : {
2353 0 : struct smb_filename *full_fname = NULL;
2354 0 : time_t timestamp = 0;
2355 :
2356 0 : full_fname = full_path_from_dirfsp_atname(talloc_tos(),
2357 : dirfsp,
2358 : smb_fname);
2359 0 : if (full_fname == NULL) {
2360 0 : errno = ENOMEM;
2361 0 : return -1;
2362 : }
2363 :
2364 0 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
2365 : handle,
2366 : full_fname,
2367 : ×tamp,
2368 : NULL)) {
2369 0 : return -1;
2370 : }
2371 0 : TALLOC_FREE(full_fname);
2372 0 : if (timestamp != 0) {
2373 0 : errno = EROFS;
2374 0 : return -1;
2375 : }
2376 0 : return SMB_VFS_NEXT_MKDIRAT(handle,
2377 : dirfsp,
2378 : smb_fname,
2379 : mode);
2380 : }
2381 :
2382 0 : static int shadow_copy2_fchflags(vfs_handle_struct *handle,
2383 : struct files_struct *fsp,
2384 : unsigned int flags)
2385 : {
2386 0 : time_t timestamp = 0;
2387 :
2388 0 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
2389 : handle,
2390 : fsp->fsp_name,
2391 : ×tamp,
2392 : NULL)) {
2393 0 : return -1;
2394 : }
2395 0 : if (timestamp != 0) {
2396 0 : errno = EROFS;
2397 0 : return -1;
2398 : }
2399 0 : return SMB_VFS_NEXT_FCHFLAGS(handle, fsp, flags);
2400 : }
2401 :
2402 0 : static int shadow_copy2_fsetxattr(struct vfs_handle_struct *handle,
2403 : struct files_struct *fsp,
2404 : const char *aname, const void *value,
2405 : size_t size, int flags)
2406 : {
2407 0 : time_t timestamp = 0;
2408 0 : const struct smb_filename *smb_fname = NULL;
2409 :
2410 0 : smb_fname = fsp->fsp_name;
2411 0 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
2412 : handle,
2413 : smb_fname,
2414 : ×tamp,
2415 : NULL)) {
2416 0 : return -1;
2417 : }
2418 0 : if (timestamp != 0) {
2419 0 : errno = EROFS;
2420 0 : return -1;
2421 : }
2422 0 : return SMB_VFS_NEXT_FSETXATTR(handle, fsp,
2423 : aname, value, size, flags);
2424 : }
2425 :
2426 0 : static NTSTATUS shadow_copy2_create_dfs_pathat(struct vfs_handle_struct *handle,
2427 : struct files_struct *dirfsp,
2428 : const struct smb_filename *smb_fname,
2429 : const struct referral *reflist,
2430 : size_t referral_count)
2431 : {
2432 0 : time_t timestamp = 0;
2433 :
2434 0 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
2435 : handle,
2436 : smb_fname,
2437 : ×tamp,
2438 : NULL)) {
2439 0 : return NT_STATUS_NO_MEMORY;
2440 : }
2441 0 : if (timestamp != 0) {
2442 0 : return NT_STATUS_MEDIA_WRITE_PROTECTED;
2443 : }
2444 0 : return SMB_VFS_NEXT_CREATE_DFS_PATHAT(handle,
2445 : dirfsp,
2446 : smb_fname,
2447 : reflist,
2448 : referral_count);
2449 : }
2450 :
2451 0 : static NTSTATUS shadow_copy2_read_dfs_pathat(struct vfs_handle_struct *handle,
2452 : TALLOC_CTX *mem_ctx,
2453 : struct files_struct *dirfsp,
2454 : struct smb_filename *smb_fname,
2455 : struct referral **ppreflist,
2456 : size_t *preferral_count)
2457 : {
2458 0 : time_t timestamp = 0;
2459 0 : char *stripped = NULL;
2460 0 : struct smb_filename *full_fname = NULL;
2461 0 : struct smb_filename *conv = NULL;
2462 : NTSTATUS status;
2463 :
2464 0 : full_fname = full_path_from_dirfsp_atname(talloc_tos(),
2465 : dirfsp,
2466 : smb_fname);
2467 0 : if (full_fname == NULL) {
2468 0 : return NT_STATUS_NO_MEMORY;
2469 : }
2470 :
2471 0 : if (!shadow_copy2_strip_snapshot(mem_ctx,
2472 : handle,
2473 : full_fname,
2474 : ×tamp,
2475 : &stripped)) {
2476 0 : TALLOC_FREE(full_fname);
2477 0 : return NT_STATUS_NO_MEMORY;
2478 : }
2479 0 : if (timestamp == 0) {
2480 0 : TALLOC_FREE(full_fname);
2481 0 : TALLOC_FREE(stripped);
2482 0 : return SMB_VFS_NEXT_READ_DFS_PATHAT(handle,
2483 : mem_ctx,
2484 : dirfsp,
2485 : smb_fname,
2486 : ppreflist,
2487 : preferral_count);
2488 : }
2489 :
2490 0 : conv = cp_smb_filename(mem_ctx, full_fname);
2491 0 : if (conv == NULL) {
2492 0 : TALLOC_FREE(full_fname);
2493 0 : TALLOC_FREE(stripped);
2494 0 : return NT_STATUS_NO_MEMORY;
2495 : }
2496 0 : TALLOC_FREE(full_fname);
2497 0 : conv->base_name = shadow_copy2_convert(conv,
2498 : handle,
2499 : stripped,
2500 : timestamp);
2501 0 : TALLOC_FREE(stripped);
2502 0 : if (conv->base_name == NULL) {
2503 0 : TALLOC_FREE(conv);
2504 0 : return NT_STATUS_NO_MEMORY;
2505 : }
2506 :
2507 0 : status = SMB_VFS_NEXT_READ_DFS_PATHAT(handle,
2508 : mem_ctx,
2509 : handle->conn->cwd_fsp,
2510 : conv,
2511 : ppreflist,
2512 : preferral_count);
2513 :
2514 0 : if (NT_STATUS_IS_OK(status)) {
2515 : /* Return any stat(2) info. */
2516 0 : smb_fname->st = conv->st;
2517 : }
2518 :
2519 0 : TALLOC_FREE(conv);
2520 0 : return status;
2521 : }
2522 :
2523 0 : static NTSTATUS shadow_copy2_get_real_filename_at(
2524 : struct vfs_handle_struct *handle,
2525 : struct files_struct *dirfsp,
2526 : const char *name,
2527 : TALLOC_CTX *mem_ctx,
2528 : char **found_name)
2529 : {
2530 0 : struct shadow_copy2_private *priv = NULL;
2531 0 : time_t timestamp = 0;
2532 0 : char *stripped = NULL;
2533 : char *conv;
2534 0 : struct smb_filename *conv_fname = NULL;
2535 : NTSTATUS status;
2536 : bool ok;
2537 :
2538 0 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2539 : return NT_STATUS_INTERNAL_ERROR);
2540 :
2541 0 : DBG_DEBUG("Path=[%s] name=[%s]\n", fsp_str_dbg(dirfsp), name);
2542 :
2543 0 : ok = shadow_copy2_strip_snapshot(
2544 : talloc_tos(), handle, dirfsp->fsp_name, ×tamp, &stripped);
2545 0 : if (!ok) {
2546 0 : status = map_nt_error_from_unix(errno);
2547 0 : DEBUG(10, ("shadow_copy2_strip_snapshot failed\n"));
2548 0 : return status;
2549 : }
2550 0 : if (timestamp == 0) {
2551 0 : DEBUG(10, ("timestamp == 0\n"));
2552 0 : return SMB_VFS_NEXT_GET_REAL_FILENAME_AT(
2553 : handle, dirfsp, name, mem_ctx, found_name);
2554 : }
2555 :
2556 : /*
2557 : * Note that stripped may be an empty string "" if path was ".". As
2558 : * shadow_copy2_convert() combines "" with the shadow-copy tree connect
2559 : * root fullpath and get_real_filename_full_scan() has an explicit check
2560 : * for "" this works.
2561 : */
2562 0 : DBG_DEBUG("stripped [%s]\n", stripped);
2563 :
2564 0 : conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2565 0 : if (conv == NULL) {
2566 0 : status = map_nt_error_from_unix(errno);
2567 0 : DBG_DEBUG("shadow_copy2_convert [%s] failed: %s\n",
2568 : stripped,
2569 : strerror(errno));
2570 0 : return status;
2571 : }
2572 :
2573 0 : status = synthetic_pathref(
2574 : talloc_tos(),
2575 0 : dirfsp->conn->cwd_fsp,
2576 : conv,
2577 : NULL,
2578 : NULL,
2579 : 0,
2580 : 0,
2581 : &conv_fname);
2582 0 : if (!NT_STATUS_IS_OK(status)) {
2583 0 : return status;
2584 : }
2585 :
2586 0 : DEBUG(10, ("Calling NEXT_GET_REAL_FILE_NAME for conv=[%s], "
2587 : "name=[%s]\n", conv, name));
2588 0 : status = SMB_VFS_NEXT_GET_REAL_FILENAME_AT(
2589 : handle, conv_fname->fsp, name, mem_ctx, found_name);
2590 0 : DEBUG(10, ("NEXT_REAL_FILE_NAME returned %s\n", nt_errstr(status)));
2591 0 : if (NT_STATUS_IS_OK(status)) {
2592 0 : TALLOC_FREE(conv_fname);
2593 0 : return NT_STATUS_OK;
2594 : }
2595 0 : if (!NT_STATUS_EQUAL(status, NT_STATUS_NOT_SUPPORTED)) {
2596 0 : TALLOC_FREE(conv_fname);
2597 0 : TALLOC_FREE(conv);
2598 0 : return NT_STATUS_NOT_SUPPORTED;
2599 : }
2600 :
2601 0 : status = get_real_filename_full_scan_at(
2602 0 : conv_fname->fsp, name, false, mem_ctx, found_name);
2603 0 : TALLOC_FREE(conv_fname);
2604 0 : if (!NT_STATUS_IS_OK(status)) {
2605 0 : DBG_DEBUG("Scan [%s] for [%s] failed\n",
2606 : conv, name);
2607 0 : return status;
2608 : }
2609 :
2610 0 : DBG_DEBUG("Scan [%s] for [%s] returned [%s]\n",
2611 : conv, name, *found_name);
2612 :
2613 0 : TALLOC_FREE(conv);
2614 0 : return NT_STATUS_OK;
2615 : }
2616 :
2617 0 : static const char *shadow_copy2_connectpath(
2618 : struct vfs_handle_struct *handle,
2619 : const struct files_struct *dirfsp,
2620 : const struct smb_filename *smb_fname_in)
2621 : {
2622 0 : time_t timestamp = 0;
2623 0 : char *stripped = NULL;
2624 0 : char *tmp = NULL;
2625 0 : const char *fname = smb_fname_in->base_name;
2626 0 : const struct smb_filename *full = NULL;
2627 0 : struct smb_filename smb_fname = {0};
2628 0 : struct smb_filename *result_fname = NULL;
2629 0 : char *result = NULL;
2630 0 : char *parent_dir = NULL;
2631 0 : int saved_errno = 0;
2632 0 : size_t rootpath_len = 0;
2633 0 : struct shadow_copy2_private *priv = NULL;
2634 :
2635 0 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2636 : return NULL);
2637 :
2638 0 : DBG_DEBUG("Calc connect path for [%s]\n", fname);
2639 :
2640 0 : if (priv->shadow_connectpath != NULL) {
2641 0 : DBG_DEBUG("cached connect path is [%s]\n",
2642 : priv->shadow_connectpath);
2643 0 : return priv->shadow_connectpath;
2644 : }
2645 :
2646 0 : full = full_path_from_dirfsp_atname(
2647 : talloc_tos(), dirfsp, smb_fname_in);
2648 0 : if (full == NULL) {
2649 0 : return NULL;
2650 : }
2651 :
2652 0 : if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, full,
2653 : ×tamp, &stripped)) {
2654 0 : goto done;
2655 : }
2656 0 : if (timestamp == 0) {
2657 0 : return SMB_VFS_NEXT_CONNECTPATH(handle, dirfsp, smb_fname_in);
2658 : }
2659 :
2660 0 : tmp = shadow_copy2_do_convert(talloc_tos(), handle, stripped, timestamp,
2661 : &rootpath_len);
2662 0 : if (tmp == NULL) {
2663 0 : if (errno != ENOENT) {
2664 0 : goto done;
2665 : }
2666 :
2667 : /*
2668 : * If the converted path does not exist, and converting
2669 : * the parent yields something that does exist, then
2670 : * this path refers to something that has not been
2671 : * created yet, relative to the parent path.
2672 : * The snapshot finding is relative to the parent.
2673 : * (usually snapshots are read/only but this is not
2674 : * necessarily true).
2675 : * This code also covers getting a wildcard in the
2676 : * last component, because this function is called
2677 : * prior to sanitizing the path, and in SMB1 we may
2678 : * get wildcards in path names.
2679 : */
2680 0 : if (!parent_dirname(talloc_tos(), stripped, &parent_dir,
2681 : NULL)) {
2682 0 : errno = ENOMEM;
2683 0 : goto done;
2684 : }
2685 :
2686 0 : tmp = shadow_copy2_do_convert(talloc_tos(), handle, parent_dir,
2687 : timestamp, &rootpath_len);
2688 0 : if (tmp == NULL) {
2689 0 : goto done;
2690 : }
2691 : }
2692 :
2693 0 : DBG_DEBUG("converted path is [%s] root path is [%.*s]\n", tmp,
2694 : (int)rootpath_len, tmp);
2695 :
2696 0 : tmp[rootpath_len] = '\0';
2697 0 : smb_fname = (struct smb_filename) { .base_name = tmp };
2698 :
2699 0 : result_fname = SMB_VFS_NEXT_REALPATH(handle, priv, &smb_fname);
2700 0 : if (result_fname == NULL) {
2701 0 : goto done;
2702 : }
2703 :
2704 : /*
2705 : * SMB_VFS_NEXT_REALPATH returns a talloc'ed string.
2706 : * Don't leak memory.
2707 : */
2708 0 : TALLOC_FREE(priv->shadow_realpath);
2709 0 : priv->shadow_realpath = result_fname;
2710 0 : result = priv->shadow_realpath->base_name;
2711 :
2712 0 : DBG_DEBUG("connect path is [%s]\n", result);
2713 :
2714 0 : done:
2715 0 : if (result == NULL) {
2716 0 : saved_errno = errno;
2717 : }
2718 0 : TALLOC_FREE(tmp);
2719 0 : TALLOC_FREE(stripped);
2720 0 : TALLOC_FREE(parent_dir);
2721 0 : if (saved_errno != 0) {
2722 0 : errno = saved_errno;
2723 : }
2724 0 : return result;
2725 : }
2726 :
2727 0 : static NTSTATUS shadow_copy2_parent_pathname(vfs_handle_struct *handle,
2728 : TALLOC_CTX *ctx,
2729 : const struct smb_filename *smb_fname_in,
2730 : struct smb_filename **parent_dir_out,
2731 : struct smb_filename **atname_out)
2732 : {
2733 0 : time_t timestamp = 0;
2734 0 : char *stripped = NULL;
2735 0 : char *converted_name = NULL;
2736 0 : struct smb_filename *smb_fname = NULL;
2737 0 : struct smb_filename *parent = NULL;
2738 0 : struct smb_filename *atname = NULL;
2739 0 : struct shadow_copy2_private *priv = NULL;
2740 0 : bool ok = false;
2741 0 : bool is_converted = false;
2742 0 : NTSTATUS status = NT_STATUS_OK;
2743 0 : TALLOC_CTX *frame = NULL;
2744 :
2745 0 : SMB_VFS_HANDLE_GET_DATA(handle,
2746 : priv,
2747 : struct shadow_copy2_private,
2748 : return NT_STATUS_INTERNAL_ERROR);
2749 :
2750 0 : frame = talloc_stackframe();
2751 :
2752 0 : smb_fname = cp_smb_filename(frame, smb_fname_in);
2753 0 : if (smb_fname == NULL) {
2754 0 : status = NT_STATUS_NO_MEMORY;
2755 0 : goto fail;
2756 : }
2757 :
2758 : /* First, call the default PARENT_PATHNAME. */
2759 0 : status = SMB_VFS_NEXT_PARENT_PATHNAME(handle,
2760 : frame,
2761 : smb_fname,
2762 : &parent,
2763 : &atname);
2764 0 : if (!NT_STATUS_IS_OK(status)) {
2765 0 : goto fail;
2766 : }
2767 :
2768 0 : if (parent->twrp == 0) {
2769 : /*
2770 : * Parent is not a snapshot path, return
2771 : * the regular result.
2772 : */
2773 0 : status = NT_STATUS_OK;
2774 0 : goto out;
2775 : }
2776 :
2777 : /* See if we can find a snapshot for the parent. */
2778 0 : ok = shadow_copy2_strip_snapshot_converted(frame,
2779 : handle,
2780 : parent,
2781 : ×tamp,
2782 : &stripped,
2783 : &is_converted);
2784 0 : if (!ok) {
2785 0 : status = map_nt_error_from_unix(errno);
2786 0 : goto fail;
2787 : }
2788 :
2789 0 : if (is_converted) {
2790 : /*
2791 : * Already found snapshot for parent so wipe
2792 : * out the twrp.
2793 : */
2794 0 : parent->twrp = 0;
2795 0 : goto out;
2796 : }
2797 :
2798 0 : converted_name = shadow_copy2_convert(frame,
2799 : handle,
2800 : stripped,
2801 : timestamp);
2802 :
2803 0 : if (converted_name == NULL) {
2804 : /*
2805 : * Can't find snapshot for parent so wipe
2806 : * out the twrp.
2807 : */
2808 0 : parent->twrp = 0;
2809 : }
2810 :
2811 0 : out:
2812 :
2813 0 : *parent_dir_out = talloc_move(ctx, &parent);
2814 0 : if (atname_out != NULL) {
2815 0 : *atname_out = talloc_move(*parent_dir_out, &atname);
2816 : }
2817 :
2818 0 : fail:
2819 :
2820 0 : TALLOC_FREE(frame);
2821 0 : return status;
2822 : }
2823 :
2824 0 : static uint64_t shadow_copy2_disk_free(vfs_handle_struct *handle,
2825 : const struct smb_filename *smb_fname,
2826 : uint64_t *bsize,
2827 : uint64_t *dfree,
2828 : uint64_t *dsize)
2829 : {
2830 0 : time_t timestamp = 0;
2831 0 : char *stripped = NULL;
2832 0 : int saved_errno = 0;
2833 0 : char *conv = NULL;
2834 0 : struct smb_filename *conv_smb_fname = NULL;
2835 0 : uint64_t ret = (uint64_t)-1;
2836 :
2837 0 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
2838 : handle,
2839 : smb_fname,
2840 : ×tamp,
2841 : &stripped)) {
2842 0 : return (uint64_t)-1;
2843 : }
2844 0 : if (timestamp == 0) {
2845 0 : return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname,
2846 : bsize, dfree, dsize);
2847 : }
2848 0 : conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2849 0 : TALLOC_FREE(stripped);
2850 0 : if (conv == NULL) {
2851 0 : return (uint64_t)-1;
2852 : }
2853 0 : conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2854 : conv,
2855 : NULL,
2856 : NULL,
2857 : 0,
2858 0 : smb_fname->flags);
2859 0 : if (conv_smb_fname == NULL) {
2860 0 : TALLOC_FREE(conv);
2861 0 : return (uint64_t)-1;
2862 : }
2863 0 : ret = SMB_VFS_NEXT_DISK_FREE(handle, conv_smb_fname,
2864 : bsize, dfree, dsize);
2865 0 : if (ret == (uint64_t)-1) {
2866 0 : saved_errno = errno;
2867 : }
2868 0 : TALLOC_FREE(conv);
2869 0 : TALLOC_FREE(conv_smb_fname);
2870 0 : if (saved_errno != 0) {
2871 0 : errno = saved_errno;
2872 : }
2873 0 : return ret;
2874 : }
2875 :
2876 0 : static int shadow_copy2_get_quota(vfs_handle_struct *handle,
2877 : const struct smb_filename *smb_fname,
2878 : enum SMB_QUOTA_TYPE qtype,
2879 : unid_t id,
2880 : SMB_DISK_QUOTA *dq)
2881 : {
2882 0 : time_t timestamp = 0;
2883 0 : char *stripped = NULL;
2884 : int ret;
2885 0 : int saved_errno = 0;
2886 : char *conv;
2887 0 : struct smb_filename *conv_smb_fname = NULL;
2888 :
2889 0 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
2890 : handle,
2891 : smb_fname,
2892 : ×tamp,
2893 : &stripped)) {
2894 0 : return -1;
2895 : }
2896 0 : if (timestamp == 0) {
2897 0 : return SMB_VFS_NEXT_GET_QUOTA(handle, smb_fname, qtype, id, dq);
2898 : }
2899 :
2900 0 : conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2901 0 : TALLOC_FREE(stripped);
2902 0 : if (conv == NULL) {
2903 0 : return -1;
2904 : }
2905 0 : conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2906 : conv,
2907 : NULL,
2908 : NULL,
2909 : 0,
2910 0 : smb_fname->flags);
2911 0 : if (conv_smb_fname == NULL) {
2912 0 : TALLOC_FREE(conv);
2913 0 : return -1;
2914 : }
2915 0 : ret = SMB_VFS_NEXT_GET_QUOTA(handle, conv_smb_fname, qtype, id, dq);
2916 :
2917 0 : if (ret == -1) {
2918 0 : saved_errno = errno;
2919 : }
2920 0 : TALLOC_FREE(conv);
2921 0 : TALLOC_FREE(conv_smb_fname);
2922 0 : if (saved_errno != 0) {
2923 0 : errno = saved_errno;
2924 : }
2925 :
2926 0 : return ret;
2927 : }
2928 :
2929 0 : static ssize_t shadow_copy2_pwrite(vfs_handle_struct *handle,
2930 : files_struct *fsp,
2931 : const void *data,
2932 : size_t n,
2933 : off_t offset)
2934 : {
2935 : ssize_t nwritten;
2936 :
2937 0 : nwritten = SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
2938 0 : if (nwritten == -1) {
2939 0 : if (errno == EBADF && fsp->fsp_flags.can_write) {
2940 0 : errno = EROFS;
2941 : }
2942 : }
2943 :
2944 0 : return nwritten;
2945 : }
2946 :
2947 : struct shadow_copy2_pwrite_state {
2948 : vfs_handle_struct *handle;
2949 : files_struct *fsp;
2950 : ssize_t ret;
2951 : struct vfs_aio_state vfs_aio_state;
2952 : };
2953 :
2954 : static void shadow_copy2_pwrite_done(struct tevent_req *subreq);
2955 :
2956 0 : static struct tevent_req *shadow_copy2_pwrite_send(
2957 : struct vfs_handle_struct *handle, TALLOC_CTX *mem_ctx,
2958 : struct tevent_context *ev, struct files_struct *fsp,
2959 : const void *data, size_t n, off_t offset)
2960 : {
2961 0 : struct tevent_req *req = NULL, *subreq = NULL;
2962 0 : struct shadow_copy2_pwrite_state *state = NULL;
2963 :
2964 0 : req = tevent_req_create(mem_ctx, &state,
2965 : struct shadow_copy2_pwrite_state);
2966 0 : if (req == NULL) {
2967 0 : return NULL;
2968 : }
2969 0 : state->handle = handle;
2970 0 : state->fsp = fsp;
2971 :
2972 0 : subreq = SMB_VFS_NEXT_PWRITE_SEND(state,
2973 : ev,
2974 : handle,
2975 : fsp,
2976 : data,
2977 : n,
2978 : offset);
2979 0 : if (tevent_req_nomem(subreq, req)) {
2980 0 : return tevent_req_post(req, ev);
2981 : }
2982 0 : tevent_req_set_callback(subreq, shadow_copy2_pwrite_done, req);
2983 :
2984 0 : return req;
2985 : }
2986 :
2987 0 : static void shadow_copy2_pwrite_done(struct tevent_req *subreq)
2988 : {
2989 0 : struct tevent_req *req = tevent_req_callback_data(
2990 : subreq, struct tevent_req);
2991 0 : struct shadow_copy2_pwrite_state *state = tevent_req_data(
2992 : req, struct shadow_copy2_pwrite_state);
2993 :
2994 0 : state->ret = SMB_VFS_PWRITE_RECV(subreq, &state->vfs_aio_state);
2995 0 : TALLOC_FREE(subreq);
2996 0 : if (state->ret == -1) {
2997 0 : tevent_req_error(req, state->vfs_aio_state.error);
2998 0 : return;
2999 : }
3000 :
3001 0 : tevent_req_done(req);
3002 : }
3003 :
3004 0 : static ssize_t shadow_copy2_pwrite_recv(struct tevent_req *req,
3005 : struct vfs_aio_state *vfs_aio_state)
3006 : {
3007 0 : struct shadow_copy2_pwrite_state *state = tevent_req_data(
3008 : req, struct shadow_copy2_pwrite_state);
3009 :
3010 0 : if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
3011 0 : if ((vfs_aio_state->error == EBADF) &&
3012 0 : state->fsp->fsp_flags.can_write)
3013 : {
3014 0 : vfs_aio_state->error = EROFS;
3015 0 : errno = EROFS;
3016 : }
3017 0 : return -1;
3018 : }
3019 :
3020 0 : *vfs_aio_state = state->vfs_aio_state;
3021 0 : return state->ret;
3022 : }
3023 :
3024 0 : static int shadow_copy2_connect(struct vfs_handle_struct *handle,
3025 : const char *service, const char *user)
3026 : {
3027 : struct shadow_copy2_config *config;
3028 : struct shadow_copy2_private *priv;
3029 : int ret;
3030 : const char *snapdir;
3031 0 : const char *snapprefix = NULL;
3032 : const char *delimiter;
3033 : const char *gmt_format;
3034 : const char *sort_order;
3035 0 : const char *basedir = NULL;
3036 0 : const char *snapsharepath = NULL;
3037 : const char *mount_point;
3038 :
3039 0 : DEBUG(10, (__location__ ": cnum[%u], connectpath[%s]\n",
3040 : (unsigned)handle->conn->cnum,
3041 : handle->conn->connectpath));
3042 :
3043 0 : ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
3044 0 : if (ret < 0) {
3045 0 : return ret;
3046 : }
3047 :
3048 0 : priv = talloc_zero(handle->conn, struct shadow_copy2_private);
3049 0 : if (priv == NULL) {
3050 0 : DBG_ERR("talloc_zero() failed\n");
3051 0 : errno = ENOMEM;
3052 0 : return -1;
3053 : }
3054 :
3055 0 : priv->snaps = talloc_zero(priv, struct shadow_copy2_snaplist_info);
3056 0 : if (priv->snaps == NULL) {
3057 0 : DBG_ERR("talloc_zero() failed\n");
3058 0 : errno = ENOMEM;
3059 0 : return -1;
3060 : }
3061 :
3062 0 : config = talloc_zero(priv, struct shadow_copy2_config);
3063 0 : if (config == NULL) {
3064 0 : DEBUG(0, ("talloc_zero() failed\n"));
3065 0 : errno = ENOMEM;
3066 0 : return -1;
3067 : }
3068 :
3069 0 : priv->config = config;
3070 :
3071 0 : gmt_format = lp_parm_const_string(SNUM(handle->conn),
3072 : "shadow", "format",
3073 : GMT_FORMAT);
3074 0 : config->gmt_format = talloc_strdup(config, gmt_format);
3075 0 : if (config->gmt_format == NULL) {
3076 0 : DEBUG(0, ("talloc_strdup() failed\n"));
3077 0 : errno = ENOMEM;
3078 0 : return -1;
3079 : }
3080 :
3081 : /* config->gmt_format must not contain a path separator. */
3082 0 : if (strchr(config->gmt_format, '/') != NULL) {
3083 0 : DEBUG(0, ("shadow:format %s must not contain a /"
3084 : "character. Unable to initialize module.\n",
3085 : config->gmt_format));
3086 0 : errno = EINVAL;
3087 0 : return -1;
3088 : }
3089 :
3090 0 : config->use_sscanf = lp_parm_bool(SNUM(handle->conn),
3091 : "shadow", "sscanf", false);
3092 :
3093 0 : config->use_localtime = lp_parm_bool(SNUM(handle->conn),
3094 : "shadow", "localtime",
3095 : false);
3096 :
3097 0 : snapdir = lp_parm_const_string(SNUM(handle->conn),
3098 : "shadow", "snapdir",
3099 : ".snapshots");
3100 0 : config->snapdir = talloc_strdup(config, snapdir);
3101 0 : if (config->snapdir == NULL) {
3102 0 : DEBUG(0, ("talloc_strdup() failed\n"));
3103 0 : errno = ENOMEM;
3104 0 : return -1;
3105 : }
3106 :
3107 0 : snapprefix = lp_parm_const_string(SNUM(handle->conn),
3108 : "shadow", "snapprefix",
3109 : NULL);
3110 0 : if (snapprefix != NULL) {
3111 0 : priv->snaps->regex = talloc_zero(priv->snaps, regex_t);
3112 0 : if (priv->snaps->regex == NULL) {
3113 0 : DBG_ERR("talloc_zero() failed\n");
3114 0 : errno = ENOMEM;
3115 0 : return -1;
3116 : }
3117 :
3118 : /* pre-compute regex rule for matching pattern later */
3119 0 : ret = regcomp(priv->snaps->regex, snapprefix, 0);
3120 0 : if (ret) {
3121 0 : DBG_ERR("Failed to create regex object\n");
3122 0 : return -1;
3123 : }
3124 : }
3125 :
3126 0 : delimiter = lp_parm_const_string(SNUM(handle->conn),
3127 : "shadow", "delimiter",
3128 : "_GMT");
3129 0 : if (delimiter != NULL) {
3130 0 : priv->config->delimiter = talloc_strdup(priv->config, delimiter);
3131 0 : if (priv->config->delimiter == NULL) {
3132 0 : DBG_ERR("talloc_strdup() failed\n");
3133 0 : errno = ENOMEM;
3134 0 : return -1;
3135 : }
3136 : }
3137 :
3138 0 : config->snapdirseverywhere = lp_parm_bool(SNUM(handle->conn),
3139 : "shadow",
3140 : "snapdirseverywhere",
3141 : false);
3142 :
3143 0 : config->crossmountpoints = lp_parm_bool(SNUM(handle->conn),
3144 : "shadow", "crossmountpoints",
3145 : false);
3146 :
3147 0 : if (config->crossmountpoints && !config->snapdirseverywhere) {
3148 0 : DBG_WARNING("Warning: 'crossmountpoints' depends on "
3149 : "'snapdirseverywhere'. Disabling crossmountpoints.\n");
3150 : }
3151 :
3152 0 : config->fixinodes = lp_parm_bool(SNUM(handle->conn),
3153 : "shadow", "fixinodes",
3154 : false);
3155 :
3156 0 : sort_order = lp_parm_const_string(SNUM(handle->conn),
3157 : "shadow", "sort", "desc");
3158 0 : config->sort_order = talloc_strdup(config, sort_order);
3159 0 : if (config->sort_order == NULL) {
3160 0 : DEBUG(0, ("talloc_strdup() failed\n"));
3161 0 : errno = ENOMEM;
3162 0 : return -1;
3163 : }
3164 :
3165 0 : mount_point = lp_parm_const_string(SNUM(handle->conn),
3166 : "shadow", "mountpoint", NULL);
3167 0 : if (mount_point != NULL) {
3168 0 : if (mount_point[0] != '/') {
3169 0 : DEBUG(1, (__location__ " Warning: 'mountpoint' is "
3170 : "relative ('%s'), but it has to be an "
3171 : "absolute path. Ignoring provided value.\n",
3172 : mount_point));
3173 0 : mount_point = NULL;
3174 : } else {
3175 : char *p;
3176 0 : p = strstr(handle->conn->connectpath, mount_point);
3177 0 : if (p != handle->conn->connectpath) {
3178 0 : DBG_WARNING("Warning: the share root (%s) is "
3179 : "not a subdirectory of the "
3180 : "specified mountpoint (%s). "
3181 : "Ignoring provided value.\n",
3182 : handle->conn->connectpath,
3183 : mount_point);
3184 0 : mount_point = NULL;
3185 : }
3186 : }
3187 : }
3188 :
3189 0 : if (mount_point != NULL) {
3190 0 : config->mount_point = talloc_strdup(config, mount_point);
3191 0 : if (config->mount_point == NULL) {
3192 0 : DEBUG(0, (__location__ " talloc_strdup() failed\n"));
3193 0 : return -1;
3194 : }
3195 : } else {
3196 0 : config->mount_point = shadow_copy2_find_mount_point(config,
3197 : handle);
3198 0 : if (config->mount_point == NULL) {
3199 0 : DBG_WARNING("shadow_copy2_find_mount_point "
3200 : "of the share root '%s' failed: %s\n",
3201 : handle->conn->connectpath, strerror(errno));
3202 0 : return -1;
3203 : }
3204 : }
3205 :
3206 0 : basedir = lp_parm_const_string(SNUM(handle->conn),
3207 : "shadow", "basedir", NULL);
3208 :
3209 0 : if (basedir != NULL) {
3210 0 : if (basedir[0] != '/') {
3211 0 : DEBUG(1, (__location__ " Warning: 'basedir' is "
3212 : "relative ('%s'), but it has to be an "
3213 : "absolute path. Disabling basedir.\n",
3214 : basedir));
3215 0 : basedir = NULL;
3216 : } else {
3217 : char *p;
3218 0 : p = strstr(basedir, config->mount_point);
3219 0 : if (p != basedir) {
3220 0 : DEBUG(1, ("Warning: basedir (%s) is not a "
3221 : "subdirectory of the share root's "
3222 : "mount point (%s). "
3223 : "Disabling basedir\n",
3224 : basedir, config->mount_point));
3225 0 : basedir = NULL;
3226 : }
3227 : }
3228 : }
3229 :
3230 0 : if (config->snapdirseverywhere && basedir != NULL) {
3231 0 : DEBUG(1, (__location__ " Warning: 'basedir' is incompatible "
3232 : "with 'snapdirseverywhere'. Disabling basedir.\n"));
3233 0 : basedir = NULL;
3234 : }
3235 :
3236 0 : snapsharepath = lp_parm_const_string(SNUM(handle->conn), "shadow",
3237 : "snapsharepath", NULL);
3238 0 : if (snapsharepath != NULL) {
3239 0 : if (snapsharepath[0] == '/') {
3240 0 : DBG_WARNING("Warning: 'snapsharepath' is "
3241 : "absolute ('%s'), but it has to be a "
3242 : "relative path. Disabling snapsharepath.\n",
3243 : snapsharepath);
3244 0 : snapsharepath = NULL;
3245 : }
3246 0 : if (config->snapdirseverywhere && snapsharepath != NULL) {
3247 0 : DBG_WARNING("Warning: 'snapsharepath' is incompatible "
3248 : "with 'snapdirseverywhere'. Disabling "
3249 : "snapsharepath.\n");
3250 0 : snapsharepath = NULL;
3251 : }
3252 : }
3253 :
3254 0 : if (basedir != NULL && snapsharepath != NULL) {
3255 0 : DBG_WARNING("Warning: 'snapsharepath' is incompatible with "
3256 : "'basedir'. Disabling snapsharepath\n");
3257 0 : snapsharepath = NULL;
3258 : }
3259 :
3260 0 : if (snapsharepath != NULL) {
3261 0 : config->rel_connectpath = talloc_strdup(config, snapsharepath);
3262 0 : if (config->rel_connectpath == NULL) {
3263 0 : DBG_ERR("talloc_strdup() failed\n");
3264 0 : errno = ENOMEM;
3265 0 : return -1;
3266 : }
3267 : }
3268 :
3269 0 : if (basedir == NULL) {
3270 0 : basedir = config->mount_point;
3271 : }
3272 :
3273 0 : if (config->rel_connectpath == NULL &&
3274 0 : strlen(basedir) < strlen(handle->conn->connectpath)) {
3275 0 : config->rel_connectpath = talloc_strdup(config,
3276 0 : handle->conn->connectpath + strlen(basedir));
3277 0 : if (config->rel_connectpath == NULL) {
3278 0 : DEBUG(0, ("talloc_strdup() failed\n"));
3279 0 : errno = ENOMEM;
3280 0 : return -1;
3281 : }
3282 : }
3283 :
3284 0 : if (config->snapdir[0] == '/') {
3285 0 : config->snapdir_absolute = true;
3286 :
3287 0 : if (config->snapdirseverywhere == true) {
3288 0 : DEBUG(1, (__location__ " Warning: An absolute snapdir "
3289 : "is incompatible with 'snapdirseverywhere', "
3290 : "setting 'snapdirseverywhere' to false.\n"));
3291 0 : config->snapdirseverywhere = false;
3292 : }
3293 :
3294 0 : if (config->crossmountpoints == true) {
3295 0 : DEBUG(1, (__location__ " Warning: 'crossmountpoints' "
3296 : "is not supported with an absolute snapdir. "
3297 : "Disabling it.\n"));
3298 0 : config->crossmountpoints = false;
3299 : }
3300 :
3301 0 : config->snapshot_basepath = config->snapdir;
3302 : } else {
3303 0 : config->snapshot_basepath = talloc_asprintf(config, "%s/%s",
3304 : config->mount_point, config->snapdir);
3305 0 : if (config->snapshot_basepath == NULL) {
3306 0 : DEBUG(0, ("talloc_asprintf() failed\n"));
3307 0 : errno = ENOMEM;
3308 0 : return -1;
3309 : }
3310 : }
3311 :
3312 0 : trim_string(config->mount_point, NULL, "/");
3313 0 : trim_string(config->rel_connectpath, "/", "/");
3314 0 : trim_string(config->snapdir, NULL, "/");
3315 0 : trim_string(config->snapshot_basepath, NULL, "/");
3316 :
3317 0 : DEBUG(10, ("shadow_copy2_connect: configuration:\n"
3318 : " share root: '%s'\n"
3319 : " mountpoint: '%s'\n"
3320 : " rel share root: '%s'\n"
3321 : " snapdir: '%s'\n"
3322 : " snapprefix: '%s'\n"
3323 : " delimiter: '%s'\n"
3324 : " snapshot base path: '%s'\n"
3325 : " format: '%s'\n"
3326 : " use sscanf: %s\n"
3327 : " snapdirs everywhere: %s\n"
3328 : " cross mountpoints: %s\n"
3329 : " fix inodes: %s\n"
3330 : " sort order: %s\n"
3331 : "",
3332 : handle->conn->connectpath,
3333 : config->mount_point,
3334 : config->rel_connectpath,
3335 : config->snapdir,
3336 : snapprefix,
3337 : config->delimiter,
3338 : config->snapshot_basepath,
3339 : config->gmt_format,
3340 : config->use_sscanf ? "yes" : "no",
3341 : config->snapdirseverywhere ? "yes" : "no",
3342 : config->crossmountpoints ? "yes" : "no",
3343 : config->fixinodes ? "yes" : "no",
3344 : config->sort_order
3345 : ));
3346 :
3347 :
3348 0 : SMB_VFS_HANDLE_SET_DATA(handle, priv,
3349 : NULL, struct shadow_copy2_private,
3350 : return -1);
3351 :
3352 0 : return 0;
3353 : }
3354 :
3355 0 : static struct dirent *shadow_copy2_readdir(vfs_handle_struct *handle,
3356 : struct files_struct *dirfsp,
3357 : DIR *dirp,
3358 : SMB_STRUCT_STAT *sbuf)
3359 : {
3360 0 : struct shadow_copy2_private *priv = NULL;
3361 0 : struct dirent *ent = NULL;
3362 : struct smb_filename atname;
3363 0 : struct smb_filename *full_fname = NULL;
3364 0 : time_t timestamp = 0;
3365 0 : char *stripped = NULL;
3366 0 : char *conv = NULL;
3367 0 : char *abspath = NULL;
3368 0 : bool converted = false;
3369 :
3370 0 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
3371 : return NULL);
3372 :
3373 0 : ent = SMB_VFS_NEXT_READDIR(handle, dirfsp, dirp, sbuf);
3374 0 : if (ent == NULL) {
3375 0 : return NULL;
3376 : }
3377 0 : if (sbuf == NULL) {
3378 0 : return ent;
3379 : }
3380 0 : if (ISDOT(dirfsp->fsp_name->base_name) && ISDOTDOT(ent->d_name)) {
3381 0 : return ent;
3382 : }
3383 :
3384 0 : atname = (struct smb_filename) {
3385 0 : .base_name = ent->d_name,
3386 0 : .twrp = dirfsp->fsp_name->twrp,
3387 0 : .flags = dirfsp->fsp_name->flags,
3388 : };
3389 :
3390 0 : full_fname = full_path_from_dirfsp_atname(talloc_tos(),
3391 : dirfsp,
3392 : &atname);
3393 0 : if (full_fname == NULL) {
3394 0 : return NULL;
3395 : }
3396 :
3397 0 : if (!shadow_copy2_strip_snapshot_converted(talloc_tos(),
3398 : handle,
3399 : full_fname,
3400 : ×tamp,
3401 : &stripped,
3402 : &converted)) {
3403 0 : TALLOC_FREE(full_fname);
3404 0 : return NULL;
3405 : }
3406 :
3407 0 : if (timestamp == 0 && !converted) {
3408 : /* Not a snapshot path, no need for convert_sbuf() */
3409 0 : TALLOC_FREE(stripped);
3410 0 : TALLOC_FREE(full_fname);
3411 0 : return ent;
3412 : }
3413 :
3414 0 : if (timestamp == 0) {
3415 0 : abspath = make_path_absolute(talloc_tos(),
3416 : priv,
3417 0 : full_fname->base_name);
3418 0 : TALLOC_FREE(full_fname);
3419 0 : if (abspath == NULL) {
3420 0 : return NULL;
3421 : }
3422 : } else {
3423 0 : conv = shadow_copy2_convert(talloc_tos(),
3424 : handle,
3425 : stripped,
3426 : timestamp);
3427 0 : TALLOC_FREE(stripped);
3428 0 : if (conv == NULL) {
3429 0 : return NULL;
3430 : }
3431 :
3432 0 : abspath = make_path_absolute(talloc_tos(), priv, conv);
3433 0 : TALLOC_FREE(conv);
3434 0 : if (abspath == NULL) {
3435 0 : return NULL;
3436 : }
3437 : }
3438 :
3439 0 : convert_sbuf(handle, abspath, sbuf);
3440 :
3441 0 : TALLOC_FREE(abspath);
3442 0 : return ent;
3443 : }
3444 :
3445 : static struct vfs_fn_pointers vfs_shadow_copy2_fns = {
3446 : .connect_fn = shadow_copy2_connect,
3447 : .disk_free_fn = shadow_copy2_disk_free,
3448 : .get_quota_fn = shadow_copy2_get_quota,
3449 : .create_dfs_pathat_fn = shadow_copy2_create_dfs_pathat,
3450 : .read_dfs_pathat_fn = shadow_copy2_read_dfs_pathat,
3451 : .renameat_fn = shadow_copy2_renameat,
3452 : .linkat_fn = shadow_copy2_linkat,
3453 : .symlinkat_fn = shadow_copy2_symlinkat,
3454 : .stat_fn = shadow_copy2_stat,
3455 : .lstat_fn = shadow_copy2_lstat,
3456 : .fstat_fn = shadow_copy2_fstat,
3457 : .fstatat_fn = shadow_copy2_fstatat,
3458 : .openat_fn = shadow_copy2_openat,
3459 : .unlinkat_fn = shadow_copy2_unlinkat,
3460 : .fchmod_fn = shadow_copy2_fchmod,
3461 : .chdir_fn = shadow_copy2_chdir,
3462 : .fntimes_fn = shadow_copy2_fntimes,
3463 : .readlinkat_fn = shadow_copy2_readlinkat,
3464 : .mknodat_fn = shadow_copy2_mknodat,
3465 : .realpath_fn = shadow_copy2_realpath,
3466 : .get_shadow_copy_data_fn = shadow_copy2_get_shadow_copy_data,
3467 : .mkdirat_fn = shadow_copy2_mkdirat,
3468 : .fsetxattr_fn = shadow_copy2_fsetxattr,
3469 : .fchflags_fn = shadow_copy2_fchflags,
3470 : .get_real_filename_at_fn = shadow_copy2_get_real_filename_at,
3471 : .pwrite_fn = shadow_copy2_pwrite,
3472 : .pwrite_send_fn = shadow_copy2_pwrite_send,
3473 : .pwrite_recv_fn = shadow_copy2_pwrite_recv,
3474 : .connectpath_fn = shadow_copy2_connectpath,
3475 : .parent_pathname_fn = shadow_copy2_parent_pathname,
3476 : .readdir_fn = shadow_copy2_readdir,
3477 : };
3478 :
3479 : static_decl_vfs;
3480 27 : NTSTATUS vfs_shadow_copy2_init(TALLOC_CTX *ctx)
3481 : {
3482 27 : return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
3483 : "shadow_copy2", &vfs_shadow_copy2_fns);
3484 : }
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