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 implementation of a shadow copy module for exposing
28 : * file system snapshots to windows clients as shadow copies.
29 : *
30 : * See the manual page for documentation.
31 : */
32 :
33 : #include "includes.h"
34 : #include "smbd/smbd.h"
35 : #include "system/filesys.h"
36 : #include "include/ntioctl.h"
37 : #include "util_tdb.h"
38 : #include "lib/util_path.h"
39 : #include "libcli/security/security.h"
40 : #include "lib/util/tevent_unix.h"
41 :
42 : struct shadow_copy2_config {
43 : char *gmt_format;
44 : bool use_sscanf;
45 : bool use_localtime;
46 : char *snapdir;
47 : char *delimiter;
48 : bool snapdirseverywhere;
49 : bool crossmountpoints;
50 : bool fixinodes;
51 : char *sort_order;
52 : bool snapdir_absolute;
53 : char *mount_point;
54 : char *rel_connectpath; /* share root, relative to a snapshot root */
55 : char *snapshot_basepath; /* the absolute version of snapdir */
56 : };
57 :
58 : /* Data-structure to hold the list of snap entries */
59 : struct shadow_copy2_snapentry {
60 : char *snapname;
61 : char *time_fmt;
62 : struct shadow_copy2_snapentry *next;
63 : struct shadow_copy2_snapentry *prev;
64 : };
65 :
66 : struct shadow_copy2_snaplist_info {
67 : struct shadow_copy2_snapentry *snaplist; /* snapshot list */
68 : regex_t *regex; /* Regex to filter snaps */
69 : time_t fetch_time; /* snaplist update time */
70 : };
71 :
72 : /*
73 : * shadow_copy2 private structure. This structure will be
74 : * used to keep module specific information
75 : */
76 : struct shadow_copy2_private {
77 : struct shadow_copy2_config *config;
78 : struct shadow_copy2_snaplist_info *snaps;
79 : char *shadow_cwd; /* Absolute $cwd path. */
80 : /* Absolute connectpath - can vary depending on $cwd. */
81 : char *shadow_connectpath;
82 : /* talloc'ed realpath return. */
83 : struct smb_filename *shadow_realpath;
84 : };
85 :
86 : static int shadow_copy2_get_shadow_copy_data(
87 : vfs_handle_struct *handle, files_struct *fsp,
88 : struct shadow_copy_data *shadow_copy2_data,
89 : bool labels);
90 :
91 : /**
92 : * This function will create a new snapshot list entry and
93 : * return to the caller. This entry will also be added to
94 : * the global snapshot list.
95 : *
96 : * @param[in] priv shadow_copy2 specific data structure
97 : * @return Newly created snapshot entry or NULL on failure
98 : */
99 228 : static struct shadow_copy2_snapentry *shadow_copy2_create_snapentry(
100 : struct shadow_copy2_private *priv)
101 : {
102 228 : struct shadow_copy2_snapentry *tmpentry = NULL;
103 :
104 228 : tmpentry = talloc_zero(priv->snaps, struct shadow_copy2_snapentry);
105 228 : if (tmpentry == NULL) {
106 0 : DBG_ERR("talloc_zero() failed\n");
107 0 : errno = ENOMEM;
108 0 : return NULL;
109 : }
110 :
111 228 : DLIST_ADD(priv->snaps->snaplist, tmpentry);
112 :
113 228 : 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 60 : static void shadow_copy2_delete_snaplist(struct shadow_copy2_private *priv)
123 : {
124 60 : struct shadow_copy2_snapentry *tmp = NULL;
125 :
126 60 : while ((tmp = priv->snaps->snaplist) != NULL) {
127 0 : DLIST_REMOVE(priv->snaps->snaplist, tmp);
128 0 : talloc_free(tmp);
129 : }
130 60 : }
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 : */
143 616 : static ssize_t shadow_copy2_saved_snapname(struct shadow_copy2_private *priv,
144 : struct tm *timestamp,
145 : char *snap_str, size_t len)
146 : {
147 616 : ssize_t snaptime_len = -1;
148 616 : struct shadow_copy2_snapentry *entry = NULL;
149 :
150 616 : snaptime_len = strftime(snap_str, len, GMT_FORMAT, timestamp);
151 616 : if (snaptime_len == 0) {
152 0 : DBG_ERR("strftime failed\n");
153 0 : return -1;
154 : }
155 :
156 616 : snaptime_len = -1;
157 :
158 1540 : for (entry = priv->snaps->snaplist; entry; entry = entry->next) {
159 1512 : if (strcmp(entry->time_fmt, snap_str) == 0) {
160 588 : snaptime_len = snprintf(snap_str, len, "%s",
161 : entry->snapname);
162 588 : return snaptime_len;
163 : }
164 : }
165 :
166 28 : snap_str[0] = 0;
167 28 : 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 28 : static bool shadow_copy2_update_snaplist(struct vfs_handle_struct *handle,
184 : time_t snap_time)
185 : {
186 28 : int ret = -1;
187 28 : bool snaplist_updated = false;
188 28 : struct files_struct fsp = {0};
189 28 : struct smb_filename smb_fname = {0};
190 28 : double seconds = 0.0;
191 28 : struct shadow_copy2_private *priv = NULL;
192 :
193 28 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
194 : return false);
195 :
196 28 : 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 28 : if (seconds > 0 || (priv->snaps->snaplist == NULL)) {
204 28 : smb_fname.base_name = discard_const_p(char, ".");
205 28 : fsp.fsp_name = &smb_fname;
206 :
207 28 : ret = shadow_copy2_get_shadow_copy_data(handle, &fsp,
208 : NULL, false);
209 28 : if (ret == 0) {
210 28 : snaplist_updated = true;
211 : } else {
212 0 : DBG_ERR("Failed to get shadow copy data\n");
213 : }
214 :
215 : }
216 :
217 28 : return snaplist_updated;
218 : }
219 :
220 7792 : 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 7792 : num_offsets = 0;
229 :
230 7792 : p = str;
231 105060 : while ((p = strchr(p, '/')) != NULL) {
232 97268 : num_offsets += 1;
233 97268 : p += 1;
234 : }
235 :
236 7792 : offsets = talloc_array(mem_ctx, size_t, num_offsets);
237 7792 : if (offsets == NULL) {
238 0 : return false;
239 : }
240 :
241 7792 : p = str;
242 7792 : num_offsets = 0;
243 105060 : while ((p = strchr(p, '/')) != NULL) {
244 97268 : offsets[num_offsets] = p-str;
245 97268 : num_offsets += 1;
246 97268 : p += 1;
247 : }
248 :
249 7792 : *poffsets = offsets;
250 7792 : *pnum_offsets = num_offsets;
251 7792 : return true;
252 : }
253 :
254 : /**
255 : * Given a timestamp, build the posix level GMT-tag string
256 : * based on the configurable format.
257 : */
258 24364 : 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 24364 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
269 : return 0);
270 :
271 24364 : config = priv->config;
272 :
273 24364 : 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 24364 : 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 24364 : if (gmtime_r(&snapshot, &snap_tm) == 0) {
290 0 : DEBUG(10, ("gmtime_r failed\n"));
291 0 : return -1;
292 : }
293 : }
294 :
295 24364 : if (priv->snaps->regex != NULL) {
296 588 : snaptime_len = shadow_copy2_saved_snapname(priv,
297 : &snap_tm, snaptime_string, len);
298 588 : if (snaptime_len >= 0)
299 560 : 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 28 : 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 28 : return shadow_copy2_saved_snapname(priv,
313 : &snap_tm, snaptime_string, len);
314 : }
315 :
316 23776 : snaptime_len = strftime(snaptime_string,
317 : len,
318 23776 : config->gmt_format,
319 : &snap_tm);
320 23776 : if (snaptime_len == 0) {
321 0 : DEBUG(10, ("strftime failed\n"));
322 0 : return -1;
323 : }
324 : }
325 :
326 23776 : 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 7792 : 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 7792 : ssize_t snaptime_len = 0;
346 7792 : char *result = NULL;
347 : struct shadow_copy2_config *config;
348 : struct shadow_copy2_private *priv;
349 :
350 7792 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
351 : return NULL);
352 :
353 7792 : config = priv->config;
354 :
355 7792 : snaptime_len = shadow_copy2_posix_gmt_string(handle,
356 : snapshot,
357 : snaptime_string,
358 : sizeof(snaptime_string));
359 7792 : if (snaptime_len <= 0) {
360 0 : return NULL;
361 : }
362 :
363 7792 : if (config->snapdir_absolute) {
364 0 : result = talloc_asprintf(mem_ctx, "%s/%s",
365 : config->snapdir, snaptime_string);
366 : } else {
367 7792 : result = talloc_asprintf(mem_ctx, "/%s/%s",
368 : config->snapdir, snaptime_string);
369 : }
370 7792 : if (result == NULL) {
371 0 : DBG_WARNING("talloc_asprintf failed\n");
372 : }
373 :
374 7792 : 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 16572 : 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 16572 : ssize_t snaptime_len = 0;
391 16572 : char *result = NULL;
392 : struct shadow_copy2_private *priv;
393 :
394 16572 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
395 : return NULL);
396 :
397 16572 : snaptime_len = shadow_copy2_posix_gmt_string(handle,
398 : snapshot,
399 : snaptime_string,
400 : sizeof(snaptime_string));
401 16572 : if (snaptime_len <= 0) {
402 0 : return NULL;
403 : }
404 :
405 16572 : result = talloc_asprintf(mem_ctx, "%s/%s",
406 16572 : priv->config->snapshot_basepath, snaptime_string);
407 16572 : if (result == NULL) {
408 0 : DBG_WARNING("talloc_asprintf failed\n");
409 : }
410 :
411 16572 : return result;
412 : }
413 :
414 150354 : static char *make_path_absolute(TALLOC_CTX *mem_ctx,
415 : struct shadow_copy2_private *priv,
416 : const char *name)
417 : {
418 150354 : char *newpath = NULL;
419 150354 : char *abs_path = NULL;
420 :
421 150354 : if (name[0] != '/') {
422 95113 : newpath = talloc_asprintf(mem_ctx,
423 : "%s/%s",
424 : priv->shadow_cwd,
425 : name);
426 95113 : if (newpath == NULL) {
427 0 : return NULL;
428 : }
429 95113 : name = newpath;
430 : }
431 150354 : abs_path = canonicalize_absolute_path(mem_ctx, name);
432 150354 : TALLOC_FREE(newpath);
433 150354 : return abs_path;
434 : }
435 :
436 : /* Return a $cwd-relative path. */
437 24364 : static bool make_relative_path(const char *cwd, char *abs_path)
438 : {
439 24364 : size_t cwd_len = strlen(cwd);
440 24364 : size_t abs_len = strlen(abs_path);
441 :
442 24364 : if (abs_len < cwd_len) {
443 0 : return false;
444 : }
445 24364 : if (memcmp(abs_path, cwd, cwd_len) != 0) {
446 0 : return false;
447 : }
448 : /* The cwd_len != 1 case is for $cwd == '/' */
449 24364 : if (cwd_len != 1 &&
450 24364 : abs_path[cwd_len] != '/' &&
451 1970 : abs_path[cwd_len] != '\0')
452 : {
453 0 : return false;
454 : }
455 24364 : if (abs_path[cwd_len] == '/') {
456 22394 : cwd_len++;
457 : }
458 24364 : memmove(abs_path, &abs_path[cwd_len], abs_len + 1 - cwd_len);
459 24364 : 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 139350 : 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 139350 : size_t snapdirlen = 0;
481 139350 : char *p = strstr_m(abs_path, priv->config->snapdir);
482 139350 : char *q = NULL;
483 139350 : char *connect_path = NULL;
484 : char snapshot[GMT_NAME_LEN+1];
485 :
486 139350 : *ppath_already_converted = false;
487 :
488 139350 : if (p == NULL) {
489 : /* Must at least contain shadow:snapdir. */
490 136807 : return 0;
491 : }
492 :
493 2543 : 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 2543 : snapdirlen = strlen(priv->config->snapdir);
500 2543 : if (p[snapdirlen] != '/') {
501 : /* shadow:snapdir must end as a separate component. */
502 2510 : return 0;
503 : }
504 :
505 33 : if (p > abs_path && p[-1] != '/') {
506 : /* shadow:snapdir must start as a separate component. */
507 0 : return 0;
508 : }
509 :
510 33 : p += snapdirlen;
511 33 : 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 33 : q = strchr(p, '/');
519 33 : if (q == NULL) {
520 : /*
521 : * No next path component.
522 : * Use entire string.
523 : */
524 27 : connect_path = talloc_strdup(mem_ctx,
525 : abs_path);
526 : } else {
527 6 : connect_path = talloc_strndup(mem_ctx,
528 : abs_path,
529 6 : q - abs_path);
530 : }
531 33 : 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 33 : 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 33 : 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 33 : if (pconnectpath != NULL) {
557 5 : *pconnectpath = connect_path;
558 : }
559 :
560 33 : *ppath_already_converted = true;
561 :
562 33 : DBG_DEBUG("path |%s| is already converted. "
563 : "connect path = |%s|\n",
564 : abs_path,
565 : connect_path);
566 :
567 33 : 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 139350 : 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 139350 : char *stripped = NULL;
596 : struct shadow_copy2_private *priv;
597 139350 : char *abs_path = NULL;
598 139350 : bool ret = true;
599 139350 : bool already_converted = false;
600 139350 : int err = 0;
601 :
602 139350 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
603 : return false);
604 :
605 139350 : DBG_DEBUG("[from %s()] Path '%s'\n",
606 : function, smb_fname_str_dbg(smb_fname));
607 :
608 139350 : if (_already_converted != NULL) {
609 103202 : *_already_converted = false;
610 : }
611 :
612 139350 : abs_path = make_path_absolute(mem_ctx, priv, smb_fname->base_name);
613 139350 : if (abs_path == NULL) {
614 0 : ret = false;
615 0 : goto out;
616 : }
617 :
618 139350 : DBG_DEBUG("abs path '%s'\n", abs_path);
619 :
620 139350 : err = check_for_converted_path(mem_ctx,
621 : handle,
622 : priv,
623 : abs_path,
624 : &already_converted,
625 : psnappath);
626 139350 : if (err != 0) {
627 : /* error in conversion. */
628 0 : ret = false;
629 0 : goto out;
630 : }
631 :
632 139350 : if (already_converted) {
633 33 : if (_already_converted != NULL) {
634 22 : *_already_converted = true;
635 : }
636 33 : goto out;
637 : }
638 :
639 139317 : if (smb_fname->twrp == 0) {
640 114949 : goto out;
641 : }
642 :
643 24368 : if (ptimestamp != NULL) {
644 24368 : *ptimestamp = nt_time_to_unix(smb_fname->twrp);
645 : }
646 :
647 24368 : if (pstripped != NULL) {
648 24364 : stripped = talloc_strdup(mem_ctx, abs_path);
649 24364 : if (stripped == NULL) {
650 0 : ret = false;
651 0 : goto out;
652 : }
653 :
654 24364 : if (smb_fname->base_name[0] != '/') {
655 24364 : ret = make_relative_path(priv->shadow_cwd, stripped);
656 24364 : 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 24364 : *pstripped = stripped;
666 : }
667 :
668 24368 : ret = true;
669 :
670 139350 : out:
671 139350 : TALLOC_FREE(abs_path);
672 139350 : 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 19884 : 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 19884 : 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 103202 : 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 103202 : 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 :
726 118 : static char *shadow_copy2_find_mount_point(TALLOC_CTX *mem_ctx,
727 : vfs_handle_struct *handle)
728 : {
729 118 : char *path = talloc_strdup(mem_ctx, handle->conn->connectpath);
730 : dev_t dev;
731 : struct stat st;
732 : char *p;
733 :
734 118 : if (stat(path, &st) != 0) {
735 0 : talloc_free(path);
736 0 : return NULL;
737 : }
738 :
739 118 : dev = st.st_dev;
740 :
741 976 : while ((p = strrchr(path, '/')) && p > path) {
742 858 : *p = 0;
743 858 : if (stat(path, &st) != 0) {
744 0 : talloc_free(path);
745 0 : return NULL;
746 : }
747 858 : if (st.st_dev != dev) {
748 0 : *p = '/';
749 0 : break;
750 : }
751 : }
752 :
753 118 : 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 24364 : 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 24364 : char *result = NULL;
770 24364 : size_t *slashes = NULL;
771 : unsigned num_slashes;
772 24364 : char *path = NULL;
773 : size_t pathlen;
774 24364 : char *insert = NULL;
775 24364 : char *converted = NULL;
776 24364 : size_t insertlen, connectlen = 0;
777 24364 : 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 24364 : size_t in_share_offset = 0;
783 :
784 24364 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
785 : return NULL);
786 :
787 24364 : config = priv->config;
788 :
789 24364 : DEBUG(10, ("converting '%s'\n", name));
790 :
791 24364 : if (!config->snapdirseverywhere) {
792 : int ret;
793 : char *snapshot_path;
794 :
795 16572 : snapshot_path = shadow_copy2_snapshot_path(talloc_tos(),
796 : handle,
797 : timestamp);
798 16572 : if (snapshot_path == NULL) {
799 0 : goto fail;
800 : }
801 :
802 16572 : if (config->rel_connectpath == NULL) {
803 4074 : converted = talloc_asprintf(mem_ctx, "%s/%s",
804 : snapshot_path, name);
805 : } else {
806 12498 : converted = talloc_asprintf(mem_ctx, "%s/%s/%s",
807 : snapshot_path,
808 : config->rel_connectpath,
809 : name);
810 : }
811 16572 : if (converted == NULL) {
812 0 : goto fail;
813 : }
814 :
815 16572 : converted_fname = (struct smb_filename) {
816 : .base_name = converted,
817 : };
818 :
819 16572 : ret = SMB_VFS_NEXT_LSTAT(handle, &converted_fname);
820 16572 : DEBUG(10, ("Trying[not snapdirseverywhere] %s: %d (%s)\n",
821 : converted,
822 : ret, ret == 0 ? "ok" : strerror(errno)));
823 16572 : if (ret == 0) {
824 16572 : DEBUG(10, ("Found %s\n", converted));
825 16572 : result = converted;
826 16572 : converted = NULL;
827 16572 : if (snaproot_len != NULL) {
828 254 : *snaproot_len = strlen(snapshot_path);
829 254 : if (config->rel_connectpath != NULL) {
830 180 : *snaproot_len +=
831 180 : strlen(config->rel_connectpath) + 1;
832 : }
833 : }
834 16572 : goto fail;
835 : } else {
836 0 : errno = ENOENT;
837 0 : goto fail;
838 : }
839 : /* never reached ... */
840 : }
841 :
842 7792 : connectlen = strlen(handle->conn->connectpath);
843 7792 : if (name[0] == 0) {
844 588 : path = talloc_strdup(mem_ctx, handle->conn->connectpath);
845 : } else {
846 7204 : path = talloc_asprintf(
847 7204 : mem_ctx, "%s/%s", handle->conn->connectpath, name);
848 : }
849 7792 : if (path == NULL) {
850 0 : errno = ENOMEM;
851 0 : goto fail;
852 : }
853 7792 : pathlen = talloc_get_size(path)-1;
854 :
855 7792 : if (!shadow_copy2_find_slashes(talloc_tos(), path,
856 : &slashes, &num_slashes)) {
857 0 : goto fail;
858 : }
859 :
860 7792 : insert = shadow_copy2_insert_string(talloc_tos(), handle, timestamp);
861 7792 : if (insert == NULL) {
862 0 : goto fail;
863 : }
864 7792 : insertlen = talloc_get_size(insert)-1;
865 :
866 : /*
867 : * Note: We deliberately don't expensively initialize the
868 : * array with talloc_zero here: Putting zero into
869 : * converted[pathlen+insertlen] below is sufficient, because
870 : * in the following for loop, the insert string is inserted
871 : * at various slash places. So the memory up to position
872 : * pathlen+insertlen will always be initialized when the
873 : * converted string is used.
874 : */
875 7792 : converted = talloc_array(mem_ctx, char, pathlen + insertlen + 1);
876 7792 : if (converted == NULL) {
877 0 : goto fail;
878 : }
879 :
880 7792 : if (path[pathlen-1] != '/') {
881 : /*
882 : * Append a fake slash to find the snapshot root
883 : */
884 : size_t *tmp;
885 7792 : tmp = talloc_realloc(talloc_tos(), slashes,
886 : size_t, num_slashes+1);
887 7792 : if (tmp == NULL) {
888 0 : goto fail;
889 : }
890 7792 : slashes = tmp;
891 7792 : slashes[num_slashes] = pathlen;
892 7792 : num_slashes += 1;
893 : }
894 :
895 7792 : min_offset = 0;
896 :
897 7792 : if (!config->crossmountpoints) {
898 7792 : min_offset = strlen(config->mount_point);
899 : }
900 :
901 7792 : memcpy(converted, path, pathlen+1);
902 7792 : converted[pathlen+insertlen] = '\0';
903 :
904 7792 : converted_fname = (struct smb_filename) {
905 : .base_name = converted,
906 : };
907 :
908 24764 : for (i = num_slashes-1; i>=0; i--) {
909 : int ret;
910 : size_t offset;
911 :
912 24764 : offset = slashes[i];
913 :
914 24764 : if (offset < min_offset) {
915 248 : errno = ENOENT;
916 248 : goto fail;
917 : }
918 :
919 24516 : if (offset >= connectlen) {
920 18038 : in_share_offset = offset;
921 : }
922 :
923 24516 : memcpy(converted+offset, insert, insertlen);
924 :
925 24516 : offset += insertlen;
926 24516 : memcpy(converted+offset, path + slashes[i],
927 24516 : pathlen - slashes[i]);
928 :
929 24516 : ret = SMB_VFS_NEXT_LSTAT(handle, &converted_fname);
930 :
931 24516 : DEBUG(10, ("Trying[snapdirseverywhere] %s: %d (%s)\n",
932 : converted,
933 : ret, ret == 0 ? "ok" : strerror(errno)));
934 24516 : if (ret == 0) {
935 : /* success */
936 7544 : if (snaproot_len != NULL) {
937 120 : *snaproot_len = in_share_offset + insertlen;
938 : }
939 7544 : break;
940 : }
941 16972 : 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 6144 : continue;
948 : }
949 10828 : if (errno != ENOENT) {
950 : /* Other problem than "not found" */
951 0 : goto fail;
952 : }
953 : }
954 :
955 7544 : if (i >= 0) {
956 : /*
957 : * Found something
958 : */
959 7544 : DEBUG(10, ("Found %s\n", converted));
960 7544 : result = converted;
961 7544 : converted = NULL;
962 : } else {
963 0 : errno = ENOENT;
964 : }
965 24364 : fail:
966 24364 : if (result == NULL) {
967 248 : saved_errno = errno;
968 : }
969 24364 : TALLOC_FREE(converted);
970 24364 : TALLOC_FREE(insert);
971 24364 : TALLOC_FREE(slashes);
972 24364 : TALLOC_FREE(path);
973 24364 : if (saved_errno != 0) {
974 248 : errno = saved_errno;
975 : }
976 24364 : 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 23990 : static char *shadow_copy2_convert(TALLOC_CTX *mem_ctx,
985 : struct vfs_handle_struct *handle,
986 : const char *name, time_t timestamp)
987 : {
988 23990 : 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 11004 : 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 11004 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1001 : return);
1002 :
1003 11004 : 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 78 : TDB_DATA key = { .dptr = discard_const_p(uint8_t, fname),
1015 78 : .dsize = strlen(fname) };
1016 : uint32_t shash;
1017 :
1018 78 : shash = tdb_jenkins_hash(&key) & 0xFF000000;
1019 78 : if (shash == 0) {
1020 0 : shash = 1;
1021 : }
1022 78 : 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 35182 : static int shadow_copy2_stat(vfs_handle_struct *handle,
1170 : struct smb_filename *smb_fname)
1171 : {
1172 35182 : struct shadow_copy2_private *priv = NULL;
1173 35182 : time_t timestamp = 0;
1174 35182 : char *stripped = NULL;
1175 35182 : bool converted = false;
1176 35182 : char *abspath = NULL;
1177 : char *tmp;
1178 35182 : int ret = 0;
1179 :
1180 35182 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1181 : return -1);
1182 :
1183 35182 : 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 35182 : if (timestamp == 0) {
1192 35180 : TALLOC_FREE(stripped);
1193 35180 : ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
1194 35180 : if (ret != 0) {
1195 4 : return ret;
1196 : }
1197 35176 : if (!converted) {
1198 35164 : return 0;
1199 : }
1200 :
1201 12 : abspath = make_path_absolute(talloc_tos(),
1202 : priv,
1203 12 : smb_fname->base_name);
1204 12 : if (abspath == NULL) {
1205 0 : return -1;
1206 : }
1207 :
1208 12 : convert_sbuf(handle, abspath, &smb_fname->st);
1209 12 : TALLOC_FREE(abspath);
1210 12 : return 0;
1211 : }
1212 :
1213 2 : tmp = smb_fname->base_name;
1214 2 : smb_fname->base_name = shadow_copy2_convert(
1215 : talloc_tos(), handle, stripped, timestamp);
1216 2 : TALLOC_FREE(stripped);
1217 :
1218 2 : if (smb_fname->base_name == NULL) {
1219 0 : smb_fname->base_name = tmp;
1220 0 : return -1;
1221 : }
1222 :
1223 2 : ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
1224 2 : if (ret != 0) {
1225 0 : goto out;
1226 : }
1227 :
1228 2 : abspath = make_path_absolute(talloc_tos(),
1229 : priv,
1230 2 : smb_fname->base_name);
1231 2 : if (abspath == NULL) {
1232 0 : ret = -1;
1233 0 : goto out;
1234 : }
1235 :
1236 2 : convert_sbuf(handle, abspath, &smb_fname->st);
1237 2 : TALLOC_FREE(abspath);
1238 :
1239 0 : out:
1240 2 : TALLOC_FREE(smb_fname->base_name);
1241 2 : smb_fname->base_name = tmp;
1242 :
1243 2 : return ret;
1244 : }
1245 :
1246 2 : static int shadow_copy2_lstat(vfs_handle_struct *handle,
1247 : struct smb_filename *smb_fname)
1248 : {
1249 2 : struct shadow_copy2_private *priv = NULL;
1250 2 : time_t timestamp = 0;
1251 2 : char *stripped = NULL;
1252 2 : bool converted = false;
1253 2 : char *abspath = NULL;
1254 : char *tmp;
1255 2 : int ret = 0;
1256 :
1257 2 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1258 : return -1);
1259 :
1260 2 : 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 2 : if (timestamp == 0) {
1269 2 : TALLOC_FREE(stripped);
1270 2 : ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
1271 2 : if (ret != 0) {
1272 0 : return ret;
1273 : }
1274 2 : if (!converted) {
1275 2 : 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 35536 : static int shadow_copy2_fstat(vfs_handle_struct *handle, files_struct *fsp,
1324 : SMB_STRUCT_STAT *sbuf)
1325 : {
1326 35536 : struct shadow_copy2_private *priv = NULL;
1327 35536 : time_t timestamp = 0;
1328 35536 : struct smb_filename *orig_smb_fname = NULL;
1329 : struct smb_filename vss_smb_fname;
1330 35536 : struct smb_filename *orig_base_smb_fname = NULL;
1331 : struct smb_filename vss_base_smb_fname;
1332 35536 : char *stripped = NULL;
1333 35536 : char *abspath = NULL;
1334 35536 : bool converted = false;
1335 : bool ok;
1336 : int ret;
1337 :
1338 35536 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1339 : return -1);
1340 :
1341 35536 : ok = shadow_copy2_strip_snapshot_converted(talloc_tos(),
1342 : handle,
1343 : fsp->fsp_name,
1344 : ×tamp,
1345 : &stripped,
1346 : &converted);
1347 35536 : if (!ok) {
1348 0 : return -1;
1349 : }
1350 :
1351 35536 : if (timestamp == 0) {
1352 26074 : TALLOC_FREE(stripped);
1353 26074 : ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
1354 26074 : if (ret != 0) {
1355 0 : return ret;
1356 : }
1357 26074 : if (!converted) {
1358 26068 : return 0;
1359 : }
1360 :
1361 6 : abspath = make_path_absolute(talloc_tos(),
1362 : priv,
1363 6 : fsp->fsp_name->base_name);
1364 6 : if (abspath == NULL) {
1365 0 : return -1;
1366 : }
1367 :
1368 6 : convert_sbuf(handle, abspath, sbuf);
1369 6 : TALLOC_FREE(abspath);
1370 6 : return 0;
1371 : }
1372 :
1373 9462 : vss_smb_fname = *fsp->fsp_name;
1374 9462 : vss_smb_fname.base_name = shadow_copy2_convert(talloc_tos(),
1375 : handle,
1376 : stripped,
1377 : timestamp);
1378 9462 : TALLOC_FREE(stripped);
1379 9462 : if (vss_smb_fname.base_name == NULL) {
1380 0 : return -1;
1381 : }
1382 :
1383 9462 : orig_smb_fname = fsp->fsp_name;
1384 9462 : fsp->fsp_name = &vss_smb_fname;
1385 :
1386 9462 : if (fsp_is_alternate_stream(fsp)) {
1387 4 : vss_base_smb_fname = *fsp->base_fsp->fsp_name;
1388 4 : vss_base_smb_fname.base_name = vss_smb_fname.base_name;
1389 4 : orig_base_smb_fname = fsp->base_fsp->fsp_name;
1390 4 : fsp->base_fsp->fsp_name = &vss_base_smb_fname;
1391 : }
1392 :
1393 9462 : ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
1394 9462 : if (ret != 0) {
1395 0 : goto out;
1396 : }
1397 :
1398 9462 : abspath = make_path_absolute(talloc_tos(),
1399 : priv,
1400 9462 : fsp->fsp_name->base_name);
1401 9462 : if (abspath == NULL) {
1402 0 : ret = -1;
1403 0 : goto out;
1404 : }
1405 :
1406 9462 : convert_sbuf(handle, abspath, sbuf);
1407 9462 : TALLOC_FREE(abspath);
1408 :
1409 0 : out:
1410 9462 : fsp->fsp_name = orig_smb_fname;
1411 9462 : if (fsp_is_alternate_stream(fsp)) {
1412 4 : fsp->base_fsp->fsp_name = orig_base_smb_fname;
1413 : }
1414 :
1415 9462 : return ret;
1416 : }
1417 :
1418 1524 : 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 1524 : struct shadow_copy2_private *priv = NULL;
1426 1524 : struct smb_filename *smb_fname = NULL;
1427 1524 : time_t timestamp = 0;
1428 1524 : char *stripped = NULL;
1429 1524 : char *abspath = NULL;
1430 1524 : bool converted = false;
1431 : int ret;
1432 : bool ok;
1433 :
1434 1524 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1435 : return -1);
1436 :
1437 1524 : smb_fname = full_path_from_dirfsp_atname(talloc_tos(),
1438 : dirfsp,
1439 : smb_fname_in);
1440 1524 : if (smb_fname == NULL) {
1441 0 : errno = ENOMEM;
1442 0 : return -1;
1443 : }
1444 :
1445 1524 : ok = shadow_copy2_strip_snapshot_converted(talloc_tos(),
1446 : handle,
1447 : smb_fname,
1448 : ×tamp,
1449 : &stripped,
1450 : &converted);
1451 1524 : if (!ok) {
1452 0 : return -1;
1453 : }
1454 1524 : if (timestamp == 0) {
1455 2 : TALLOC_FREE(stripped);
1456 2 : ret = SMB_VFS_NEXT_FSTATAT(
1457 : handle, dirfsp, smb_fname_in, sbuf, flags);
1458 2 : if (ret != 0) {
1459 0 : return ret;
1460 : }
1461 2 : if (!converted) {
1462 2 : 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 1522 : smb_fname->base_name = shadow_copy2_convert(
1478 : smb_fname, handle, stripped, timestamp);
1479 1522 : TALLOC_FREE(stripped);
1480 1522 : if (smb_fname->base_name == NULL) {
1481 0 : TALLOC_FREE(smb_fname);
1482 0 : errno = ENOMEM;
1483 0 : return -1;
1484 : }
1485 :
1486 1522 : ret = SMB_VFS_NEXT_FSTATAT(handle,
1487 : dirfsp,
1488 : smb_fname,
1489 : sbuf,
1490 : flags);
1491 1522 : 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 1522 : abspath = make_path_absolute(
1499 1522 : talloc_tos(), priv, smb_fname->base_name);
1500 1522 : if (abspath == NULL) {
1501 0 : TALLOC_FREE(smb_fname);
1502 0 : errno = ENOMEM;
1503 0 : return -1;
1504 : }
1505 :
1506 1522 : convert_sbuf(handle, abspath, sbuf);
1507 1522 : TALLOC_FREE(abspath);
1508 :
1509 1522 : TALLOC_FREE(smb_fname);
1510 :
1511 1522 : return 0;
1512 : }
1513 :
1514 28830 : 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 28830 : struct smb_filename *result = NULL;
1521 :
1522 28830 : if (fsp->base_fsp != NULL) {
1523 10 : struct smb_filename *base_fname = fsp->base_fsp->fsp_name;
1524 :
1525 10 : if (smb_fname_in->base_name[0] == '/') {
1526 : /*
1527 : * Special-case stream names from streams_depot
1528 : */
1529 6 : result = cp_smb_filename(mem_ctx, smb_fname_in);
1530 : } else {
1531 :
1532 4 : SMB_ASSERT(is_named_stream(smb_fname_in));
1533 :
1534 4 : result = synthetic_smb_fname(mem_ctx,
1535 4 : base_fname->base_name,
1536 4 : smb_fname_in->stream_name,
1537 : &smb_fname_in->st,
1538 4 : smb_fname_in->twrp,
1539 4 : smb_fname_in->flags);
1540 : }
1541 : } else {
1542 28820 : result = full_path_from_dirfsp_atname(
1543 : mem_ctx, dirfsp, smb_fname_in);
1544 : }
1545 :
1546 28830 : return result;
1547 : }
1548 :
1549 35900 : 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 35900 : struct vfs_open_how how = *_how;
1556 35900 : struct smb_filename *smb_fname = NULL;
1557 35900 : time_t timestamp = 0;
1558 35900 : char *stripped = NULL;
1559 35900 : bool is_converted = false;
1560 35900 : int saved_errno = 0;
1561 : int ret;
1562 : bool ok;
1563 :
1564 35900 : if (how.resolve != 0) {
1565 7070 : errno = ENOSYS;
1566 7070 : return -1;
1567 : }
1568 :
1569 28830 : smb_fname = shadow_copy2_openat_name(
1570 : talloc_tos(), dirfsp, fsp, smb_fname_in);
1571 28830 : if (smb_fname == NULL) {
1572 0 : errno = ENOMEM;
1573 0 : return -1;
1574 : }
1575 :
1576 28830 : ok = shadow_copy2_strip_snapshot_converted(talloc_tos(),
1577 : handle,
1578 : smb_fname,
1579 : ×tamp,
1580 : &stripped,
1581 : &is_converted);
1582 28830 : if (!ok) {
1583 0 : TALLOC_FREE(smb_fname);
1584 0 : return -1;
1585 : }
1586 28830 : if (timestamp == 0) {
1587 20558 : TALLOC_FREE(stripped);
1588 20558 : TALLOC_FREE(smb_fname);
1589 20558 : if (is_converted) {
1590 : /*
1591 : * Just pave over the user requested mode and use
1592 : * O_RDONLY. Later attempts by the client to write on
1593 : * the handle will fail in the pwrite() syscall with
1594 : * EINVAL which we carefully map to EROFS. In sum, this
1595 : * matches Windows behaviour.
1596 : */
1597 4 : how.flags &= ~(O_WRONLY | O_RDWR | O_CREAT);
1598 : }
1599 20558 : return SMB_VFS_NEXT_OPENAT(handle,
1600 : dirfsp,
1601 : smb_fname_in,
1602 : fsp,
1603 : &how);
1604 : }
1605 :
1606 8272 : smb_fname->base_name = shadow_copy2_convert(smb_fname,
1607 : handle,
1608 : stripped,
1609 : timestamp);
1610 8272 : if (smb_fname->base_name == NULL) {
1611 180 : int err = errno;
1612 180 : TALLOC_FREE(stripped);
1613 180 : TALLOC_FREE(smb_fname);
1614 180 : errno = err;
1615 180 : return -1;
1616 : }
1617 8092 : TALLOC_FREE(stripped);
1618 :
1619 : /*
1620 : * Just pave over the user requested mode and use O_RDONLY. Later
1621 : * attempts by the client to write on the handle will fail in the
1622 : * pwrite() syscall with EINVAL which we carefully map to EROFS. In sum,
1623 : * this matches Windows behaviour.
1624 : */
1625 8092 : how.flags &= ~(O_WRONLY | O_RDWR | O_CREAT);
1626 :
1627 8092 : ret = SMB_VFS_NEXT_OPENAT(handle,
1628 : dirfsp,
1629 : smb_fname,
1630 : fsp,
1631 : &how);
1632 8092 : if (ret == -1) {
1633 1520 : saved_errno = errno;
1634 : }
1635 :
1636 8092 : TALLOC_FREE(smb_fname);
1637 :
1638 8092 : if (saved_errno != 0) {
1639 1520 : errno = saved_errno;
1640 : }
1641 8092 : return ret;
1642 : }
1643 :
1644 12 : static int shadow_copy2_unlinkat(vfs_handle_struct *handle,
1645 : struct files_struct *dirfsp,
1646 : const struct smb_filename *smb_fname,
1647 : int flags)
1648 : {
1649 12 : time_t timestamp = 0;
1650 :
1651 12 : if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1652 : smb_fname,
1653 : ×tamp, NULL)) {
1654 0 : return -1;
1655 : }
1656 12 : if (timestamp != 0) {
1657 0 : errno = EROFS;
1658 0 : return -1;
1659 : }
1660 12 : return SMB_VFS_NEXT_UNLINKAT(handle,
1661 : dirfsp,
1662 : smb_fname,
1663 : flags);
1664 : }
1665 :
1666 10 : static int shadow_copy2_fchmod(vfs_handle_struct *handle,
1667 : struct files_struct *fsp,
1668 : mode_t mode)
1669 : {
1670 10 : time_t timestamp = 0;
1671 10 : const struct smb_filename *smb_fname = NULL;
1672 :
1673 10 : smb_fname = fsp->fsp_name;
1674 10 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
1675 : handle,
1676 : smb_fname,
1677 : ×tamp,
1678 : NULL)) {
1679 0 : return -1;
1680 : }
1681 10 : if (timestamp != 0) {
1682 0 : errno = EROFS;
1683 0 : return -1;
1684 : }
1685 10 : return SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
1686 : }
1687 :
1688 16264 : static void store_cwd_data(vfs_handle_struct *handle,
1689 : const char *connectpath)
1690 : {
1691 16264 : struct shadow_copy2_private *priv = NULL;
1692 16264 : struct smb_filename *cwd_fname = NULL;
1693 :
1694 16264 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1695 : return);
1696 :
1697 16264 : TALLOC_FREE(priv->shadow_cwd);
1698 16264 : cwd_fname = SMB_VFS_NEXT_GETWD(handle, talloc_tos());
1699 16264 : if (cwd_fname == NULL) {
1700 0 : smb_panic("getwd failed\n");
1701 : }
1702 16264 : DBG_DEBUG("shadow cwd = %s\n", cwd_fname->base_name);
1703 16264 : priv->shadow_cwd = talloc_strdup(priv, cwd_fname->base_name);
1704 16264 : TALLOC_FREE(cwd_fname);
1705 16264 : if (priv->shadow_cwd == NULL) {
1706 0 : smb_panic("talloc failed\n");
1707 : }
1708 16264 : TALLOC_FREE(priv->shadow_connectpath);
1709 16264 : if (connectpath) {
1710 5 : DBG_DEBUG("shadow connectpath = %s\n", connectpath);
1711 5 : priv->shadow_connectpath = talloc_strdup(priv, connectpath);
1712 5 : if (priv->shadow_connectpath == NULL) {
1713 0 : smb_panic("talloc failed\n");
1714 : }
1715 : }
1716 : }
1717 :
1718 16264 : static int shadow_copy2_chdir(vfs_handle_struct *handle,
1719 : const struct smb_filename *smb_fname)
1720 : {
1721 16264 : time_t timestamp = 0;
1722 16264 : char *stripped = NULL;
1723 16264 : char *snappath = NULL;
1724 16264 : int ret = -1;
1725 16264 : int saved_errno = 0;
1726 16264 : char *conv = NULL;
1727 16264 : size_t rootpath_len = 0;
1728 16264 : struct smb_filename *conv_smb_fname = NULL;
1729 :
1730 16264 : if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1731 : handle,
1732 : smb_fname,
1733 : ×tamp,
1734 : &stripped,
1735 : &snappath,
1736 : NULL)) {
1737 0 : return -1;
1738 : }
1739 16264 : if (stripped != NULL) {
1740 0 : conv = shadow_copy2_do_convert(talloc_tos(),
1741 : handle,
1742 : stripped,
1743 : timestamp,
1744 : &rootpath_len);
1745 0 : TALLOC_FREE(stripped);
1746 0 : if (conv == NULL) {
1747 0 : return -1;
1748 : }
1749 0 : conv_smb_fname = synthetic_smb_fname(talloc_tos(),
1750 : conv,
1751 : NULL,
1752 : NULL,
1753 : 0,
1754 0 : smb_fname->flags);
1755 : } else {
1756 16264 : conv_smb_fname = cp_smb_filename(talloc_tos(), smb_fname);
1757 : }
1758 :
1759 16264 : if (conv_smb_fname == NULL) {
1760 0 : TALLOC_FREE(conv);
1761 0 : errno = ENOMEM;
1762 0 : return -1;
1763 : }
1764 :
1765 16264 : ret = SMB_VFS_NEXT_CHDIR(handle, conv_smb_fname);
1766 16264 : if (ret == -1) {
1767 0 : saved_errno = errno;
1768 : }
1769 :
1770 16264 : if (ret == 0) {
1771 16264 : if (conv != NULL && rootpath_len != 0) {
1772 0 : conv[rootpath_len] = '\0';
1773 16264 : } else if (snappath != 0) {
1774 5 : TALLOC_FREE(conv);
1775 5 : conv = snappath;
1776 : }
1777 16264 : store_cwd_data(handle, conv);
1778 : }
1779 :
1780 16264 : TALLOC_FREE(stripped);
1781 16264 : TALLOC_FREE(conv);
1782 16264 : TALLOC_FREE(conv_smb_fname);
1783 :
1784 16264 : if (saved_errno != 0) {
1785 0 : errno = saved_errno;
1786 : }
1787 16264 : return ret;
1788 : }
1789 :
1790 12 : static int shadow_copy2_fntimes(vfs_handle_struct *handle,
1791 : files_struct *fsp,
1792 : struct smb_file_time *ft)
1793 : {
1794 12 : time_t timestamp = 0;
1795 :
1796 12 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
1797 : handle,
1798 : fsp->fsp_name,
1799 : ×tamp,
1800 : NULL)) {
1801 0 : return -1;
1802 : }
1803 12 : if (timestamp != 0) {
1804 2 : errno = EROFS;
1805 2 : return -1;
1806 : }
1807 10 : return SMB_VFS_NEXT_FNTIMES(handle, fsp, ft);
1808 : }
1809 :
1810 2668 : static int shadow_copy2_readlinkat(vfs_handle_struct *handle,
1811 : const struct files_struct *dirfsp,
1812 : const struct smb_filename *smb_fname,
1813 : char *buf,
1814 : size_t bufsiz)
1815 : {
1816 2668 : time_t timestamp = 0;
1817 2668 : char *stripped = NULL;
1818 2668 : int saved_errno = 0;
1819 : int ret;
1820 2668 : struct smb_filename *full_fname = NULL;
1821 2668 : struct smb_filename *conv = NULL;
1822 :
1823 2668 : full_fname = full_path_from_dirfsp_atname(talloc_tos(),
1824 : dirfsp,
1825 : smb_fname);
1826 2668 : if (full_fname == NULL) {
1827 0 : errno = ENOMEM;
1828 0 : return -1;
1829 : }
1830 :
1831 2668 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
1832 : handle,
1833 : full_fname,
1834 : ×tamp,
1835 : &stripped)) {
1836 0 : TALLOC_FREE(full_fname);
1837 0 : return -1;
1838 : }
1839 :
1840 2668 : if (timestamp == 0) {
1841 186 : TALLOC_FREE(full_fname);
1842 186 : TALLOC_FREE(stripped);
1843 186 : return SMB_VFS_NEXT_READLINKAT(handle,
1844 : dirfsp,
1845 : smb_fname,
1846 : buf,
1847 : bufsiz);
1848 : }
1849 2482 : conv = cp_smb_filename(talloc_tos(), full_fname);
1850 2482 : if (conv == NULL) {
1851 0 : TALLOC_FREE(full_fname);
1852 0 : TALLOC_FREE(stripped);
1853 0 : errno = ENOMEM;
1854 0 : return -1;
1855 : }
1856 2482 : TALLOC_FREE(full_fname);
1857 2482 : conv->base_name = shadow_copy2_convert(
1858 : conv, handle, stripped, timestamp);
1859 2482 : TALLOC_FREE(stripped);
1860 2482 : if (conv->base_name == NULL) {
1861 0 : return -1;
1862 : }
1863 2482 : ret = SMB_VFS_NEXT_READLINKAT(handle,
1864 : handle->conn->cwd_fsp,
1865 : conv,
1866 : buf,
1867 : bufsiz);
1868 2482 : if (ret == -1) {
1869 0 : saved_errno = errno;
1870 : }
1871 2482 : TALLOC_FREE(conv);
1872 2482 : if (saved_errno != 0) {
1873 0 : errno = saved_errno;
1874 : }
1875 2482 : return ret;
1876 : }
1877 :
1878 0 : static int shadow_copy2_mknodat(vfs_handle_struct *handle,
1879 : files_struct *dirfsp,
1880 : const struct smb_filename *smb_fname,
1881 : mode_t mode,
1882 : SMB_DEV_T dev)
1883 : {
1884 0 : time_t timestamp = 0;
1885 :
1886 0 : if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1887 : smb_fname,
1888 : ×tamp, NULL)) {
1889 0 : return -1;
1890 : }
1891 0 : if (timestamp != 0) {
1892 0 : errno = EROFS;
1893 0 : return -1;
1894 : }
1895 0 : return SMB_VFS_NEXT_MKNODAT(handle,
1896 : dirfsp,
1897 : smb_fname,
1898 : mode,
1899 : dev);
1900 : }
1901 :
1902 10498 : static struct smb_filename *shadow_copy2_realpath(vfs_handle_struct *handle,
1903 : TALLOC_CTX *ctx,
1904 : const struct smb_filename *smb_fname)
1905 : {
1906 10498 : time_t timestamp = 0;
1907 10498 : char *stripped = NULL;
1908 10498 : struct smb_filename *result_fname = NULL;
1909 10498 : struct smb_filename *conv_fname = NULL;
1910 10498 : int saved_errno = 0;
1911 :
1912 10498 : if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1913 : smb_fname,
1914 : ×tamp, &stripped)) {
1915 0 : goto done;
1916 : }
1917 10498 : if (timestamp == 0) {
1918 10376 : return SMB_VFS_NEXT_REALPATH(handle, ctx, smb_fname);
1919 : }
1920 :
1921 122 : conv_fname = cp_smb_filename(talloc_tos(), smb_fname);
1922 122 : if (conv_fname == NULL) {
1923 0 : goto done;
1924 : }
1925 122 : conv_fname->base_name = shadow_copy2_convert(
1926 : conv_fname, handle, stripped, timestamp);
1927 122 : if (conv_fname->base_name == NULL) {
1928 0 : goto done;
1929 : }
1930 :
1931 122 : result_fname = SMB_VFS_NEXT_REALPATH(handle, ctx, conv_fname);
1932 :
1933 122 : done:
1934 122 : if (result_fname == NULL) {
1935 0 : saved_errno = errno;
1936 : }
1937 122 : TALLOC_FREE(conv_fname);
1938 122 : TALLOC_FREE(stripped);
1939 122 : if (saved_errno != 0) {
1940 0 : errno = saved_errno;
1941 : }
1942 122 : return result_fname;
1943 : }
1944 :
1945 : /**
1946 : * Check whether a given directory contains a
1947 : * snapshot directory as direct subdirectory.
1948 : * If yes, return the path of the snapshot-subdir,
1949 : * otherwise return NULL.
1950 : */
1951 2440 : static char *have_snapdir(struct vfs_handle_struct *handle,
1952 : TALLOC_CTX *mem_ctx,
1953 : const char *path)
1954 : {
1955 : struct smb_filename smb_fname;
1956 : int ret;
1957 : struct shadow_copy2_private *priv;
1958 :
1959 2440 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1960 : return NULL);
1961 :
1962 2440 : smb_fname = (struct smb_filename) {
1963 2440 : .base_name = talloc_asprintf(
1964 2440 : mem_ctx, "%s/%s", path, priv->config->snapdir),
1965 : };
1966 2440 : if (smb_fname.base_name == NULL) {
1967 0 : return NULL;
1968 : }
1969 :
1970 2440 : ret = SMB_VFS_NEXT_STAT(handle, &smb_fname);
1971 2440 : if ((ret == 0) && (S_ISDIR(smb_fname.st.st_ex_mode))) {
1972 744 : return smb_fname.base_name;
1973 : }
1974 1696 : TALLOC_FREE(smb_fname.base_name);
1975 1696 : return NULL;
1976 : }
1977 :
1978 : /**
1979 : * Find the snapshot directory (if any) for the given
1980 : * filename (which is relative to the share).
1981 : */
1982 2510 : static const char *shadow_copy2_find_snapdir(TALLOC_CTX *mem_ctx,
1983 : struct vfs_handle_struct *handle,
1984 : struct smb_filename *smb_fname)
1985 : {
1986 : char *path, *p;
1987 : const char *snapdir;
1988 : struct shadow_copy2_config *config;
1989 : struct shadow_copy2_private *priv;
1990 :
1991 2510 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1992 : return NULL);
1993 :
1994 2510 : config = priv->config;
1995 :
1996 : /*
1997 : * If the non-snapdisrseverywhere mode, we should not search!
1998 : */
1999 2510 : if (!config->snapdirseverywhere) {
2000 1766 : return config->snapshot_basepath;
2001 : }
2002 :
2003 744 : path = talloc_asprintf(mem_ctx, "%s/%s",
2004 744 : handle->conn->connectpath,
2005 : smb_fname->base_name);
2006 744 : if (path == NULL) {
2007 0 : return NULL;
2008 : }
2009 :
2010 744 : snapdir = have_snapdir(handle, talloc_tos(), path);
2011 744 : if (snapdir != NULL) {
2012 8 : TALLOC_FREE(path);
2013 8 : return snapdir;
2014 : }
2015 :
2016 1696 : while ((p = strrchr(path, '/')) && (p > path)) {
2017 :
2018 1696 : p[0] = '\0';
2019 :
2020 1696 : snapdir = have_snapdir(handle, talloc_tos(), path);
2021 1696 : if (snapdir != NULL) {
2022 736 : TALLOC_FREE(path);
2023 736 : return snapdir;
2024 : }
2025 : }
2026 0 : TALLOC_FREE(path);
2027 0 : return NULL;
2028 : }
2029 :
2030 14983 : static bool shadow_copy2_snapshot_to_gmt(vfs_handle_struct *handle,
2031 : const char *name,
2032 : char *gmt, size_t gmt_len)
2033 : {
2034 14983 : struct tm timestamp = { .tm_sec = 0, };
2035 : time_t timestamp_t;
2036 : unsigned long int timestamp_long;
2037 : const char *fmt;
2038 : struct shadow_copy2_config *config;
2039 : struct shadow_copy2_private *priv;
2040 14983 : char *tmpstr = NULL;
2041 14983 : char *tmp = NULL;
2042 14983 : bool converted = false;
2043 14983 : int ret = -1;
2044 :
2045 14983 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2046 : return NULL);
2047 :
2048 14983 : config = priv->config;
2049 :
2050 14983 : fmt = config->gmt_format;
2051 :
2052 : /*
2053 : * If regex is provided, then we will have to parse the
2054 : * filename which will contain both the prefix and the time format.
2055 : * e.g. <prefix><delimiter><time_format>
2056 : */
2057 14983 : if (priv->snaps->regex != NULL) {
2058 1104 : tmpstr = talloc_strdup(talloc_tos(), name);
2059 : /* point "name" to the time format */
2060 1104 : name = strstr(name, priv->config->delimiter);
2061 1104 : if (name == NULL) {
2062 620 : goto done;
2063 : }
2064 : /* Extract the prefix */
2065 484 : tmp = strstr(tmpstr, priv->config->delimiter);
2066 484 : if (tmp == NULL) {
2067 0 : goto done;
2068 : }
2069 484 : *tmp = '\0';
2070 :
2071 : /* Parse regex */
2072 484 : ret = regexec(priv->snaps->regex, tmpstr, 0, NULL, 0);
2073 484 : if (ret) {
2074 40 : DBG_DEBUG("shadow_copy2_snapshot_to_gmt: "
2075 : "no regex match for %s\n", tmpstr);
2076 40 : goto done;
2077 : }
2078 : }
2079 :
2080 14323 : if (config->use_sscanf) {
2081 0 : if (sscanf(name, fmt, ×tamp_long) != 1) {
2082 0 : DEBUG(10, ("shadow_copy2_snapshot_to_gmt: "
2083 : "no sscanf match %s: %s\n",
2084 : fmt, name));
2085 0 : goto done;
2086 : }
2087 0 : timestamp_t = timestamp_long;
2088 0 : gmtime_r(×tamp_t, ×tamp);
2089 : } else {
2090 14323 : if (strptime(name, fmt, ×tamp) == NULL) {
2091 6804 : DEBUG(10, ("shadow_copy2_snapshot_to_gmt: "
2092 : "no match %s: %s\n",
2093 : fmt, name));
2094 6804 : goto done;
2095 : }
2096 7519 : DEBUG(10, ("shadow_copy2_snapshot_to_gmt: match %s: %s\n",
2097 : fmt, name));
2098 :
2099 7519 : if (config->use_localtime) {
2100 0 : timestamp.tm_isdst = -1;
2101 0 : timestamp_t = mktime(×tamp);
2102 0 : gmtime_r(×tamp_t, ×tamp);
2103 : }
2104 : }
2105 :
2106 7519 : strftime(gmt, gmt_len, GMT_FORMAT, ×tamp);
2107 7519 : converted = true;
2108 :
2109 14983 : done:
2110 14983 : TALLOC_FREE(tmpstr);
2111 14983 : return converted;
2112 : }
2113 :
2114 0 : static int shadow_copy2_label_cmp_asc(const void *x, const void *y)
2115 : {
2116 0 : return strncmp((const char *)x, (const char *)y, sizeof(SHADOW_COPY_LABEL));
2117 : }
2118 :
2119 4872 : static int shadow_copy2_label_cmp_desc(const void *x, const void *y)
2120 : {
2121 4872 : return -strncmp((const char *)x, (const char *)y, sizeof(SHADOW_COPY_LABEL));
2122 : }
2123 :
2124 : /*
2125 : sort the shadow copy data in ascending or descending order
2126 : */
2127 2510 : static void shadow_copy2_sort_data(vfs_handle_struct *handle,
2128 : struct shadow_copy_data *shadow_copy2_data)
2129 : {
2130 : int (*cmpfunc)(const void *, const void *);
2131 : const char *sort;
2132 : struct shadow_copy2_private *priv;
2133 :
2134 2510 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2135 : return);
2136 :
2137 2510 : sort = priv->config->sort_order;
2138 2510 : if (sort == NULL) {
2139 0 : return;
2140 : }
2141 :
2142 2510 : if (strcmp(sort, "asc") == 0) {
2143 0 : cmpfunc = shadow_copy2_label_cmp_asc;
2144 2510 : } else if (strcmp(sort, "desc") == 0) {
2145 2510 : cmpfunc = shadow_copy2_label_cmp_desc;
2146 : } else {
2147 0 : return;
2148 : }
2149 :
2150 2510 : if (shadow_copy2_data && shadow_copy2_data->num_volumes > 0 &&
2151 2480 : shadow_copy2_data->labels)
2152 : {
2153 1238 : TYPESAFE_QSORT(shadow_copy2_data->labels,
2154 : shadow_copy2_data->num_volumes,
2155 : cmpfunc);
2156 : }
2157 : }
2158 :
2159 2510 : static int shadow_copy2_get_shadow_copy_data(
2160 : vfs_handle_struct *handle, files_struct *fsp,
2161 : struct shadow_copy_data *shadow_copy2_data,
2162 : bool labels)
2163 : {
2164 2510 : DIR *p = NULL;
2165 : const char *snapdir;
2166 2510 : struct smb_filename *snapdir_smb_fname = NULL;
2167 2510 : struct files_struct *dirfsp = NULL;
2168 2510 : struct files_struct *fspcwd = NULL;
2169 : struct dirent *d;
2170 2510 : TALLOC_CTX *tmp_ctx = talloc_stackframe();
2171 2510 : struct shadow_copy2_private *priv = NULL;
2172 2510 : struct shadow_copy2_snapentry *tmpentry = NULL;
2173 2510 : bool get_snaplist = false;
2174 2510 : struct vfs_open_how how = {
2175 : .flags = O_RDONLY, .mode = 0,
2176 : };
2177 : int fd;
2178 2510 : int ret = -1;
2179 : NTSTATUS status;
2180 2510 : int saved_errno = 0;
2181 :
2182 2510 : snapdir = shadow_copy2_find_snapdir(tmp_ctx, handle, fsp->fsp_name);
2183 2510 : if (snapdir == NULL) {
2184 0 : DEBUG(0,("shadow:snapdir not found for %s in get_shadow_copy_data\n",
2185 : handle->conn->connectpath));
2186 0 : errno = EINVAL;
2187 0 : goto done;
2188 : }
2189 :
2190 2510 : snapdir_smb_fname = synthetic_smb_fname(talloc_tos(),
2191 : snapdir,
2192 : NULL,
2193 : NULL,
2194 : 0,
2195 2510 : fsp->fsp_name->flags);
2196 2510 : if (snapdir_smb_fname == NULL) {
2197 0 : errno = ENOMEM;
2198 0 : goto done;
2199 : }
2200 :
2201 2510 : status = create_internal_dirfsp(handle->conn,
2202 : snapdir_smb_fname,
2203 : &dirfsp);
2204 2510 : if (!NT_STATUS_IS_OK(status)) {
2205 0 : DBG_WARNING("create_internal_dir_fsp() failed for '%s'"
2206 : " - %s\n", snapdir, nt_errstr(status));
2207 0 : errno = ENOSYS;
2208 0 : goto done;
2209 : }
2210 :
2211 2510 : status = vfs_at_fspcwd(talloc_tos(), handle->conn, &fspcwd);
2212 2510 : if (!NT_STATUS_IS_OK(status)) {
2213 0 : errno = ENOMEM;
2214 0 : goto done;
2215 : }
2216 :
2217 : #ifdef O_DIRECTORY
2218 2510 : how.flags |= O_DIRECTORY;
2219 : #endif
2220 :
2221 2510 : fd = SMB_VFS_NEXT_OPENAT(handle,
2222 : fspcwd,
2223 : snapdir_smb_fname,
2224 : dirfsp,
2225 : &how);
2226 2510 : if (fd == -1) {
2227 0 : DBG_WARNING("SMB_VFS_NEXT_OPEN failed for '%s'"
2228 : " - %s\n", snapdir, strerror(errno));
2229 0 : errno = ENOSYS;
2230 0 : goto done;
2231 : }
2232 2510 : fsp_set_fd(dirfsp, fd);
2233 :
2234 : /* Now we have the handle, check access here. */
2235 2510 : status = smbd_check_access_rights_fsp(fspcwd,
2236 : dirfsp,
2237 : false,
2238 : SEC_DIR_LIST);
2239 2510 : if (!NT_STATUS_IS_OK(status)) {
2240 0 : DBG_ERR("user does not have list permission "
2241 : "on snapdir %s\n",
2242 : fsp_str_dbg(dirfsp));
2243 0 : errno = EACCES;
2244 0 : goto done;
2245 : }
2246 :
2247 2510 : p = SMB_VFS_NEXT_FDOPENDIR(handle, dirfsp, NULL, 0);
2248 2510 : if (!p) {
2249 0 : DBG_NOTICE("shadow_copy2: SMB_VFS_NEXT_FDOPENDIR() failed for '%s'"
2250 : " - %s\n", snapdir, strerror(errno));
2251 0 : errno = ENOSYS;
2252 0 : goto done;
2253 : }
2254 :
2255 2510 : if (shadow_copy2_data != NULL) {
2256 2482 : shadow_copy2_data->num_volumes = 0;
2257 2482 : shadow_copy2_data->labels = NULL;
2258 : }
2259 :
2260 2510 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2261 : goto done);
2262 :
2263 : /*
2264 : * Normally this function is called twice once with labels = false and
2265 : * then with labels = true. When labels is false it will return the
2266 : * number of volumes so that the caller can allocate memory for that
2267 : * many labels. Therefore to eliminate snaplist both the times it is
2268 : * good to check if labels is set or not.
2269 : *
2270 : * shadow_copy2_data is NULL when we only want to update the list and
2271 : * don't want any labels.
2272 : */
2273 2510 : if ((priv->snaps->regex != NULL) && (labels || shadow_copy2_data == NULL)) {
2274 60 : get_snaplist = true;
2275 : /* Reset the global snaplist */
2276 60 : shadow_copy2_delete_snaplist(priv);
2277 :
2278 : /* Set the current time as snaplist update time */
2279 60 : time(&(priv->snaps->fetch_time));
2280 : }
2281 :
2282 17460 : while ((d = SMB_VFS_NEXT_READDIR(handle, dirfsp, p))) {
2283 : char snapshot[GMT_NAME_LEN+1];
2284 : SHADOW_COPY_LABEL *tlabels;
2285 :
2286 : /*
2287 : * ignore names not of the right form in the snapshot
2288 : * directory
2289 : */
2290 14950 : if (!shadow_copy2_snapshot_to_gmt(
2291 14950 : handle, d->d_name,
2292 : snapshot, sizeof(snapshot))) {
2293 :
2294 7464 : DEBUG(6, ("shadow_copy2_get_shadow_copy_data: "
2295 : "ignoring %s\n", d->d_name));
2296 11268 : continue;
2297 : }
2298 7486 : DEBUG(6,("shadow_copy2_get_shadow_copy_data: %s -> %s\n",
2299 : d->d_name, snapshot));
2300 :
2301 7486 : if (get_snaplist) {
2302 : /*
2303 : * Create a snap entry for each successful
2304 : * pattern match.
2305 : */
2306 228 : tmpentry = shadow_copy2_create_snapentry(priv);
2307 228 : if (tmpentry == NULL) {
2308 0 : DBG_ERR("talloc_zero() failed\n");
2309 0 : goto done;
2310 : }
2311 228 : tmpentry->snapname = talloc_strdup(tmpentry, d->d_name);
2312 228 : tmpentry->time_fmt = talloc_strdup(tmpentry, snapshot);
2313 : }
2314 :
2315 7486 : if (shadow_copy2_data == NULL) {
2316 116 : continue;
2317 : }
2318 :
2319 7370 : if (!labels) {
2320 : /* the caller doesn't want the labels */
2321 3688 : shadow_copy2_data->num_volumes++;
2322 3688 : continue;
2323 : }
2324 :
2325 3682 : tlabels = talloc_realloc(shadow_copy2_data,
2326 : shadow_copy2_data->labels,
2327 : SHADOW_COPY_LABEL,
2328 : shadow_copy2_data->num_volumes+1);
2329 3682 : if (tlabels == NULL) {
2330 0 : DEBUG(0,("shadow_copy2: out of memory\n"));
2331 0 : goto done;
2332 : }
2333 :
2334 3682 : strlcpy(tlabels[shadow_copy2_data->num_volumes], snapshot,
2335 : sizeof(*tlabels));
2336 :
2337 3682 : shadow_copy2_data->num_volumes++;
2338 3682 : shadow_copy2_data->labels = tlabels;
2339 : }
2340 :
2341 2510 : shadow_copy2_sort_data(handle, shadow_copy2_data);
2342 2510 : ret = 0;
2343 :
2344 2510 : done:
2345 2510 : if (ret != 0) {
2346 0 : saved_errno = errno;
2347 : }
2348 2510 : TALLOC_FREE(fspcwd );
2349 2510 : if (p != NULL) {
2350 2510 : SMB_VFS_NEXT_CLOSEDIR(handle, p);
2351 2510 : p = NULL;
2352 2510 : if (dirfsp != NULL) {
2353 : /*
2354 : * VFS_CLOSEDIR implicitly
2355 : * closed the associated fd.
2356 : */
2357 2510 : fsp_set_fd(dirfsp, -1);
2358 : }
2359 : }
2360 2510 : if (dirfsp != NULL) {
2361 2510 : fd_close(dirfsp);
2362 2510 : file_free(NULL, dirfsp);
2363 : }
2364 2510 : TALLOC_FREE(tmp_ctx);
2365 2510 : if (saved_errno != 0) {
2366 0 : errno = saved_errno;
2367 : }
2368 2510 : return ret;
2369 : }
2370 :
2371 10 : static int shadow_copy2_mkdirat(vfs_handle_struct *handle,
2372 : struct files_struct *dirfsp,
2373 : const struct smb_filename *smb_fname,
2374 : mode_t mode)
2375 : {
2376 10 : struct smb_filename *full_fname = NULL;
2377 10 : time_t timestamp = 0;
2378 :
2379 10 : full_fname = full_path_from_dirfsp_atname(talloc_tos(),
2380 : dirfsp,
2381 : smb_fname);
2382 10 : if (full_fname == NULL) {
2383 0 : errno = ENOMEM;
2384 0 : return -1;
2385 : }
2386 :
2387 10 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
2388 : handle,
2389 : full_fname,
2390 : ×tamp,
2391 : NULL)) {
2392 0 : TALLOC_FREE(full_fname);
2393 0 : return -1;
2394 : }
2395 10 : TALLOC_FREE(full_fname);
2396 10 : if (timestamp != 0) {
2397 0 : errno = EROFS;
2398 0 : return -1;
2399 : }
2400 10 : return SMB_VFS_NEXT_MKDIRAT(handle,
2401 : dirfsp,
2402 : smb_fname,
2403 : mode);
2404 : }
2405 :
2406 0 : static int shadow_copy2_fchflags(vfs_handle_struct *handle,
2407 : struct files_struct *fsp,
2408 : unsigned int flags)
2409 : {
2410 0 : time_t timestamp = 0;
2411 :
2412 0 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
2413 : handle,
2414 : fsp->fsp_name,
2415 : ×tamp,
2416 : NULL)) {
2417 0 : return -1;
2418 : }
2419 0 : if (timestamp != 0) {
2420 0 : errno = EROFS;
2421 0 : return -1;
2422 : }
2423 0 : return SMB_VFS_NEXT_FCHFLAGS(handle, fsp, flags);
2424 : }
2425 :
2426 22 : static int shadow_copy2_fsetxattr(struct vfs_handle_struct *handle,
2427 : struct files_struct *fsp,
2428 : const char *aname, const void *value,
2429 : size_t size, int flags)
2430 : {
2431 22 : time_t timestamp = 0;
2432 22 : const struct smb_filename *smb_fname = NULL;
2433 :
2434 22 : smb_fname = fsp->fsp_name;
2435 22 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
2436 : handle,
2437 : smb_fname,
2438 : ×tamp,
2439 : NULL)) {
2440 0 : return -1;
2441 : }
2442 22 : if (timestamp != 0) {
2443 2 : errno = EROFS;
2444 2 : return -1;
2445 : }
2446 20 : return SMB_VFS_NEXT_FSETXATTR(handle, fsp,
2447 : aname, value, size, flags);
2448 : }
2449 :
2450 0 : static NTSTATUS shadow_copy2_create_dfs_pathat(struct vfs_handle_struct *handle,
2451 : struct files_struct *dirfsp,
2452 : const struct smb_filename *smb_fname,
2453 : const struct referral *reflist,
2454 : size_t referral_count)
2455 : {
2456 0 : time_t timestamp = 0;
2457 :
2458 0 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
2459 : handle,
2460 : smb_fname,
2461 : ×tamp,
2462 : NULL)) {
2463 0 : return NT_STATUS_NO_MEMORY;
2464 : }
2465 0 : if (timestamp != 0) {
2466 0 : return NT_STATUS_MEDIA_WRITE_PROTECTED;
2467 : }
2468 0 : return SMB_VFS_NEXT_CREATE_DFS_PATHAT(handle,
2469 : dirfsp,
2470 : smb_fname,
2471 : reflist,
2472 : referral_count);
2473 : }
2474 :
2475 0 : static NTSTATUS shadow_copy2_read_dfs_pathat(struct vfs_handle_struct *handle,
2476 : TALLOC_CTX *mem_ctx,
2477 : struct files_struct *dirfsp,
2478 : struct smb_filename *smb_fname,
2479 : struct referral **ppreflist,
2480 : size_t *preferral_count)
2481 : {
2482 0 : time_t timestamp = 0;
2483 0 : char *stripped = NULL;
2484 0 : struct smb_filename *full_fname = NULL;
2485 0 : struct smb_filename *conv = NULL;
2486 : NTSTATUS status;
2487 :
2488 0 : full_fname = full_path_from_dirfsp_atname(talloc_tos(),
2489 : dirfsp,
2490 : smb_fname);
2491 0 : if (full_fname == NULL) {
2492 0 : return NT_STATUS_NO_MEMORY;
2493 : }
2494 :
2495 0 : if (!shadow_copy2_strip_snapshot(mem_ctx,
2496 : handle,
2497 : full_fname,
2498 : ×tamp,
2499 : &stripped)) {
2500 0 : TALLOC_FREE(full_fname);
2501 0 : return NT_STATUS_NO_MEMORY;
2502 : }
2503 0 : if (timestamp == 0) {
2504 0 : TALLOC_FREE(full_fname);
2505 0 : TALLOC_FREE(stripped);
2506 0 : return SMB_VFS_NEXT_READ_DFS_PATHAT(handle,
2507 : mem_ctx,
2508 : dirfsp,
2509 : smb_fname,
2510 : ppreflist,
2511 : preferral_count);
2512 : }
2513 :
2514 0 : conv = cp_smb_filename(mem_ctx, full_fname);
2515 0 : if (conv == NULL) {
2516 0 : TALLOC_FREE(full_fname);
2517 0 : TALLOC_FREE(stripped);
2518 0 : return NT_STATUS_NO_MEMORY;
2519 : }
2520 0 : TALLOC_FREE(full_fname);
2521 0 : conv->base_name = shadow_copy2_convert(conv,
2522 : handle,
2523 : stripped,
2524 : timestamp);
2525 0 : TALLOC_FREE(stripped);
2526 0 : if (conv->base_name == NULL) {
2527 0 : TALLOC_FREE(conv);
2528 0 : return NT_STATUS_NO_MEMORY;
2529 : }
2530 :
2531 0 : status = SMB_VFS_NEXT_READ_DFS_PATHAT(handle,
2532 : mem_ctx,
2533 : handle->conn->cwd_fsp,
2534 : conv,
2535 : ppreflist,
2536 : preferral_count);
2537 :
2538 0 : if (NT_STATUS_IS_OK(status)) {
2539 : /* Return any stat(2) info. */
2540 0 : smb_fname->st = conv->st;
2541 : }
2542 :
2543 0 : TALLOC_FREE(conv);
2544 0 : return status;
2545 : }
2546 :
2547 120 : static NTSTATUS shadow_copy2_get_real_filename_at(
2548 : struct vfs_handle_struct *handle,
2549 : struct files_struct *dirfsp,
2550 : const char *name,
2551 : TALLOC_CTX *mem_ctx,
2552 : char **found_name)
2553 : {
2554 120 : struct shadow_copy2_private *priv = NULL;
2555 120 : time_t timestamp = 0;
2556 120 : char *stripped = NULL;
2557 : char *conv;
2558 120 : struct smb_filename *conv_fname = NULL;
2559 : NTSTATUS status;
2560 : bool ok;
2561 :
2562 120 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2563 : return NT_STATUS_INTERNAL_ERROR);
2564 :
2565 120 : DBG_DEBUG("Path=[%s] name=[%s]\n", fsp_str_dbg(dirfsp), name);
2566 :
2567 120 : ok = shadow_copy2_strip_snapshot(
2568 : talloc_tos(), handle, dirfsp->fsp_name, ×tamp, &stripped);
2569 120 : if (!ok) {
2570 0 : status = map_nt_error_from_unix(errno);
2571 0 : DEBUG(10, ("shadow_copy2_strip_snapshot failed\n"));
2572 0 : return status;
2573 : }
2574 120 : if (timestamp == 0) {
2575 120 : DEBUG(10, ("timestamp == 0\n"));
2576 120 : return SMB_VFS_NEXT_GET_REAL_FILENAME_AT(
2577 : handle, dirfsp, name, mem_ctx, found_name);
2578 : }
2579 :
2580 : /*
2581 : * Note that stripped may be an empty string "" if path was ".". As
2582 : * shadow_copy2_convert() combines "" with the shadow-copy tree connect
2583 : * root fullpath and get_real_filename_full_scan() has an explicit check
2584 : * for "" this works.
2585 : */
2586 0 : DBG_DEBUG("stripped [%s]\n", stripped);
2587 :
2588 0 : conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2589 0 : if (conv == NULL) {
2590 0 : status = map_nt_error_from_unix(errno);
2591 0 : DBG_DEBUG("shadow_copy2_convert [%s] failed: %s\n",
2592 : stripped,
2593 : strerror(errno));
2594 0 : return status;
2595 : }
2596 :
2597 0 : status = synthetic_pathref(
2598 : talloc_tos(),
2599 0 : dirfsp->conn->cwd_fsp,
2600 : conv,
2601 : NULL,
2602 : NULL,
2603 : 0,
2604 : 0,
2605 : &conv_fname);
2606 0 : if (!NT_STATUS_IS_OK(status)) {
2607 0 : return status;
2608 : }
2609 :
2610 0 : DEBUG(10, ("Calling NEXT_GET_REAL_FILE_NAME for conv=[%s], "
2611 : "name=[%s]\n", conv, name));
2612 0 : status = SMB_VFS_NEXT_GET_REAL_FILENAME_AT(
2613 : handle, conv_fname->fsp, name, mem_ctx, found_name);
2614 0 : DEBUG(10, ("NEXT_REAL_FILE_NAME returned %s\n", nt_errstr(status)));
2615 0 : if (NT_STATUS_IS_OK(status)) {
2616 0 : TALLOC_FREE(conv_fname);
2617 0 : return NT_STATUS_OK;
2618 : }
2619 0 : if (!NT_STATUS_EQUAL(status, NT_STATUS_NOT_SUPPORTED)) {
2620 0 : TALLOC_FREE(conv_fname);
2621 0 : TALLOC_FREE(conv);
2622 0 : return NT_STATUS_NOT_SUPPORTED;
2623 : }
2624 :
2625 0 : status = get_real_filename_full_scan_at(
2626 0 : conv_fname->fsp, name, false, mem_ctx, found_name);
2627 0 : TALLOC_FREE(conv_fname);
2628 0 : if (!NT_STATUS_IS_OK(status)) {
2629 0 : DBG_DEBUG("Scan [%s] for [%s] failed\n",
2630 : conv, name);
2631 0 : return status;
2632 : }
2633 :
2634 0 : DBG_DEBUG("Scan [%s] for [%s] returned [%s]\n",
2635 : conv, name, *found_name);
2636 :
2637 0 : TALLOC_FREE(conv);
2638 0 : return NT_STATUS_OK;
2639 : }
2640 :
2641 6120 : static const char *shadow_copy2_connectpath(
2642 : struct vfs_handle_struct *handle,
2643 : const struct files_struct *dirfsp,
2644 : const struct smb_filename *smb_fname_in)
2645 : {
2646 6120 : time_t timestamp = 0;
2647 6120 : char *stripped = NULL;
2648 6120 : char *tmp = NULL;
2649 6120 : const char *fname = smb_fname_in->base_name;
2650 6120 : const struct smb_filename *full = NULL;
2651 6120 : struct smb_filename smb_fname = {0};
2652 6120 : struct smb_filename *result_fname = NULL;
2653 6120 : char *result = NULL;
2654 6120 : char *parent_dir = NULL;
2655 6120 : int saved_errno = 0;
2656 6120 : size_t rootpath_len = 0;
2657 6120 : struct shadow_copy2_private *priv = NULL;
2658 :
2659 6120 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2660 : return NULL);
2661 :
2662 6120 : DBG_DEBUG("Calc connect path for [%s]\n", fname);
2663 :
2664 6120 : if (priv->shadow_connectpath != NULL) {
2665 2 : DBG_DEBUG("cached connect path is [%s]\n",
2666 : priv->shadow_connectpath);
2667 2 : return priv->shadow_connectpath;
2668 : }
2669 :
2670 6118 : full = full_path_from_dirfsp_atname(
2671 : talloc_tos(), dirfsp, smb_fname_in);
2672 6118 : if (full == NULL) {
2673 0 : return NULL;
2674 : }
2675 :
2676 6118 : if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, full,
2677 : ×tamp, &stripped)) {
2678 0 : goto done;
2679 : }
2680 6118 : if (timestamp == 0) {
2681 5744 : return SMB_VFS_NEXT_CONNECTPATH(handle, dirfsp, smb_fname_in);
2682 : }
2683 :
2684 374 : tmp = shadow_copy2_do_convert(talloc_tos(), handle, stripped, timestamp,
2685 : &rootpath_len);
2686 374 : if (tmp == NULL) {
2687 0 : if (errno != ENOENT) {
2688 0 : goto done;
2689 : }
2690 :
2691 : /*
2692 : * If the converted path does not exist, and converting
2693 : * the parent yields something that does exist, then
2694 : * this path refers to something that has not been
2695 : * created yet, relative to the parent path.
2696 : * The snapshot finding is relative to the parent.
2697 : * (usually snapshots are read/only but this is not
2698 : * necessarily true).
2699 : * This code also covers getting a wildcard in the
2700 : * last component, because this function is called
2701 : * prior to sanitizing the path, and in SMB1 we may
2702 : * get wildcards in path names.
2703 : */
2704 0 : if (!parent_dirname(talloc_tos(), stripped, &parent_dir,
2705 : NULL)) {
2706 0 : errno = ENOMEM;
2707 0 : goto done;
2708 : }
2709 :
2710 0 : tmp = shadow_copy2_do_convert(talloc_tos(), handle, parent_dir,
2711 : timestamp, &rootpath_len);
2712 0 : if (tmp == NULL) {
2713 0 : goto done;
2714 : }
2715 : }
2716 :
2717 374 : DBG_DEBUG("converted path is [%s] root path is [%.*s]\n", tmp,
2718 : (int)rootpath_len, tmp);
2719 :
2720 374 : tmp[rootpath_len] = '\0';
2721 374 : smb_fname = (struct smb_filename) { .base_name = tmp };
2722 :
2723 374 : result_fname = SMB_VFS_NEXT_REALPATH(handle, priv, &smb_fname);
2724 374 : if (result_fname == NULL) {
2725 0 : goto done;
2726 : }
2727 :
2728 : /*
2729 : * SMB_VFS_NEXT_REALPATH returns a talloc'ed string.
2730 : * Don't leak memory.
2731 : */
2732 374 : TALLOC_FREE(priv->shadow_realpath);
2733 374 : priv->shadow_realpath = result_fname;
2734 374 : result = priv->shadow_realpath->base_name;
2735 :
2736 374 : DBG_DEBUG("connect path is [%s]\n", result);
2737 :
2738 374 : done:
2739 374 : if (result == NULL) {
2740 0 : saved_errno = errno;
2741 : }
2742 374 : TALLOC_FREE(tmp);
2743 374 : TALLOC_FREE(stripped);
2744 374 : TALLOC_FREE(parent_dir);
2745 374 : if (saved_errno != 0) {
2746 0 : errno = saved_errno;
2747 : }
2748 374 : return result;
2749 : }
2750 :
2751 11086 : static NTSTATUS shadow_copy2_parent_pathname(vfs_handle_struct *handle,
2752 : TALLOC_CTX *ctx,
2753 : const struct smb_filename *smb_fname_in,
2754 : struct smb_filename **parent_dir_out,
2755 : struct smb_filename **atname_out)
2756 : {
2757 11086 : time_t timestamp = 0;
2758 11086 : char *stripped = NULL;
2759 11086 : char *converted_name = NULL;
2760 11086 : struct smb_filename *smb_fname = NULL;
2761 11086 : struct smb_filename *parent = NULL;
2762 11086 : struct smb_filename *atname = NULL;
2763 11086 : struct shadow_copy2_private *priv = NULL;
2764 11086 : bool ok = false;
2765 11086 : bool is_converted = false;
2766 11086 : NTSTATUS status = NT_STATUS_OK;
2767 11086 : TALLOC_CTX *frame = NULL;
2768 :
2769 11086 : SMB_VFS_HANDLE_GET_DATA(handle,
2770 : priv,
2771 : struct shadow_copy2_private,
2772 : return NT_STATUS_INTERNAL_ERROR);
2773 :
2774 11086 : frame = talloc_stackframe();
2775 :
2776 11086 : smb_fname = cp_smb_filename(frame, smb_fname_in);
2777 11086 : if (smb_fname == NULL) {
2778 0 : status = NT_STATUS_NO_MEMORY;
2779 0 : goto fail;
2780 : }
2781 :
2782 : /* First, call the default PARENT_PATHNAME. */
2783 11086 : status = SMB_VFS_NEXT_PARENT_PATHNAME(handle,
2784 : frame,
2785 : smb_fname,
2786 : &parent,
2787 : &atname);
2788 11086 : if (!NT_STATUS_IS_OK(status)) {
2789 0 : goto fail;
2790 : }
2791 :
2792 11086 : if (parent->twrp == 0) {
2793 : /*
2794 : * Parent is not a snapshot path, return
2795 : * the regular result.
2796 : */
2797 8958 : status = NT_STATUS_OK;
2798 8958 : goto out;
2799 : }
2800 :
2801 : /* See if we can find a snapshot for the parent. */
2802 2128 : ok = shadow_copy2_strip_snapshot_converted(frame,
2803 : handle,
2804 : parent,
2805 : ×tamp,
2806 : &stripped,
2807 : &is_converted);
2808 2128 : if (!ok) {
2809 0 : status = map_nt_error_from_unix(errno);
2810 0 : goto fail;
2811 : }
2812 :
2813 2128 : if (is_converted) {
2814 : /*
2815 : * Already found snapshot for parent so wipe
2816 : * out the twrp.
2817 : */
2818 0 : parent->twrp = 0;
2819 0 : goto out;
2820 : }
2821 :
2822 2128 : converted_name = shadow_copy2_convert(frame,
2823 : handle,
2824 : stripped,
2825 : timestamp);
2826 :
2827 2128 : if (converted_name == NULL) {
2828 : /*
2829 : * Can't find snapshot for parent so wipe
2830 : * out the twrp.
2831 : */
2832 68 : parent->twrp = 0;
2833 : }
2834 :
2835 2060 : out:
2836 :
2837 11086 : *parent_dir_out = talloc_move(ctx, &parent);
2838 11086 : if (atname_out != NULL) {
2839 11086 : *atname_out = talloc_move(*parent_dir_out, &atname);
2840 : }
2841 :
2842 0 : fail:
2843 :
2844 11086 : TALLOC_FREE(frame);
2845 11086 : return status;
2846 : }
2847 :
2848 138 : static uint64_t shadow_copy2_disk_free(vfs_handle_struct *handle,
2849 : const struct smb_filename *smb_fname,
2850 : uint64_t *bsize,
2851 : uint64_t *dfree,
2852 : uint64_t *dsize)
2853 : {
2854 138 : time_t timestamp = 0;
2855 138 : char *stripped = NULL;
2856 138 : int saved_errno = 0;
2857 138 : char *conv = NULL;
2858 138 : struct smb_filename *conv_smb_fname = NULL;
2859 138 : uint64_t ret = (uint64_t)-1;
2860 :
2861 138 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
2862 : handle,
2863 : smb_fname,
2864 : ×tamp,
2865 : &stripped)) {
2866 0 : return (uint64_t)-1;
2867 : }
2868 138 : if (timestamp == 0) {
2869 138 : return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname,
2870 : bsize, dfree, dsize);
2871 : }
2872 0 : conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2873 0 : TALLOC_FREE(stripped);
2874 0 : if (conv == NULL) {
2875 0 : return (uint64_t)-1;
2876 : }
2877 0 : conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2878 : conv,
2879 : NULL,
2880 : NULL,
2881 : 0,
2882 0 : smb_fname->flags);
2883 0 : if (conv_smb_fname == NULL) {
2884 0 : TALLOC_FREE(conv);
2885 0 : return (uint64_t)-1;
2886 : }
2887 0 : ret = SMB_VFS_NEXT_DISK_FREE(handle, conv_smb_fname,
2888 : bsize, dfree, dsize);
2889 0 : if (ret == (uint64_t)-1) {
2890 0 : saved_errno = errno;
2891 : }
2892 0 : TALLOC_FREE(conv);
2893 0 : TALLOC_FREE(conv_smb_fname);
2894 0 : if (saved_errno != 0) {
2895 0 : errno = saved_errno;
2896 : }
2897 0 : return ret;
2898 : }
2899 :
2900 276 : static int shadow_copy2_get_quota(vfs_handle_struct *handle,
2901 : const struct smb_filename *smb_fname,
2902 : enum SMB_QUOTA_TYPE qtype,
2903 : unid_t id,
2904 : SMB_DISK_QUOTA *dq)
2905 : {
2906 276 : time_t timestamp = 0;
2907 276 : char *stripped = NULL;
2908 : int ret;
2909 276 : int saved_errno = 0;
2910 : char *conv;
2911 276 : struct smb_filename *conv_smb_fname = NULL;
2912 :
2913 276 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
2914 : handle,
2915 : smb_fname,
2916 : ×tamp,
2917 : &stripped)) {
2918 0 : return -1;
2919 : }
2920 276 : if (timestamp == 0) {
2921 276 : return SMB_VFS_NEXT_GET_QUOTA(handle, smb_fname, qtype, id, dq);
2922 : }
2923 :
2924 0 : conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2925 0 : TALLOC_FREE(stripped);
2926 0 : if (conv == NULL) {
2927 0 : return -1;
2928 : }
2929 0 : conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2930 : conv,
2931 : NULL,
2932 : NULL,
2933 : 0,
2934 0 : smb_fname->flags);
2935 0 : if (conv_smb_fname == NULL) {
2936 0 : TALLOC_FREE(conv);
2937 0 : return -1;
2938 : }
2939 0 : ret = SMB_VFS_NEXT_GET_QUOTA(handle, conv_smb_fname, qtype, id, dq);
2940 :
2941 0 : if (ret == -1) {
2942 0 : saved_errno = errno;
2943 : }
2944 0 : TALLOC_FREE(conv);
2945 0 : TALLOC_FREE(conv_smb_fname);
2946 0 : if (saved_errno != 0) {
2947 0 : errno = saved_errno;
2948 : }
2949 :
2950 0 : return ret;
2951 : }
2952 :
2953 2 : static ssize_t shadow_copy2_pwrite(vfs_handle_struct *handle,
2954 : files_struct *fsp,
2955 : const void *data,
2956 : size_t n,
2957 : off_t offset)
2958 : {
2959 : ssize_t nwritten;
2960 :
2961 2 : nwritten = SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
2962 2 : if (nwritten == -1) {
2963 2 : if (errno == EBADF && fsp->fsp_flags.can_write) {
2964 2 : errno = EROFS;
2965 : }
2966 : }
2967 :
2968 2 : return nwritten;
2969 : }
2970 :
2971 : struct shadow_copy2_pwrite_state {
2972 : vfs_handle_struct *handle;
2973 : files_struct *fsp;
2974 : ssize_t ret;
2975 : struct vfs_aio_state vfs_aio_state;
2976 : };
2977 :
2978 : static void shadow_copy2_pwrite_done(struct tevent_req *subreq);
2979 :
2980 6 : static struct tevent_req *shadow_copy2_pwrite_send(
2981 : struct vfs_handle_struct *handle, TALLOC_CTX *mem_ctx,
2982 : struct tevent_context *ev, struct files_struct *fsp,
2983 : const void *data, size_t n, off_t offset)
2984 : {
2985 6 : struct tevent_req *req = NULL, *subreq = NULL;
2986 6 : struct shadow_copy2_pwrite_state *state = NULL;
2987 :
2988 6 : req = tevent_req_create(mem_ctx, &state,
2989 : struct shadow_copy2_pwrite_state);
2990 6 : if (req == NULL) {
2991 0 : return NULL;
2992 : }
2993 6 : state->handle = handle;
2994 6 : state->fsp = fsp;
2995 :
2996 6 : subreq = SMB_VFS_NEXT_PWRITE_SEND(state,
2997 : ev,
2998 : handle,
2999 : fsp,
3000 : data,
3001 : n,
3002 : offset);
3003 6 : if (tevent_req_nomem(subreq, req)) {
3004 0 : return tevent_req_post(req, ev);
3005 : }
3006 6 : tevent_req_set_callback(subreq, shadow_copy2_pwrite_done, req);
3007 :
3008 6 : return req;
3009 : }
3010 :
3011 6 : static void shadow_copy2_pwrite_done(struct tevent_req *subreq)
3012 : {
3013 6 : struct tevent_req *req = tevent_req_callback_data(
3014 : subreq, struct tevent_req);
3015 6 : struct shadow_copy2_pwrite_state *state = tevent_req_data(
3016 : req, struct shadow_copy2_pwrite_state);
3017 :
3018 6 : state->ret = SMB_VFS_PWRITE_RECV(subreq, &state->vfs_aio_state);
3019 6 : TALLOC_FREE(subreq);
3020 6 : if (state->ret == -1) {
3021 0 : tevent_req_error(req, state->vfs_aio_state.error);
3022 0 : return;
3023 : }
3024 :
3025 6 : tevent_req_done(req);
3026 : }
3027 :
3028 6 : static ssize_t shadow_copy2_pwrite_recv(struct tevent_req *req,
3029 : struct vfs_aio_state *vfs_aio_state)
3030 : {
3031 6 : struct shadow_copy2_pwrite_state *state = tevent_req_data(
3032 : req, struct shadow_copy2_pwrite_state);
3033 :
3034 6 : if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
3035 0 : if ((vfs_aio_state->error == EBADF) &&
3036 0 : state->fsp->fsp_flags.can_write)
3037 : {
3038 0 : vfs_aio_state->error = EROFS;
3039 0 : errno = EROFS;
3040 : }
3041 0 : return -1;
3042 : }
3043 :
3044 6 : *vfs_aio_state = state->vfs_aio_state;
3045 6 : return state->ret;
3046 : }
3047 :
3048 2420 : static int shadow_copy2_connect(struct vfs_handle_struct *handle,
3049 : const char *service, const char *user)
3050 : {
3051 : struct shadow_copy2_config *config;
3052 : struct shadow_copy2_private *priv;
3053 : int ret;
3054 : const char *snapdir;
3055 2420 : const char *snapprefix = NULL;
3056 : const char *delimiter;
3057 : const char *gmt_format;
3058 : const char *sort_order;
3059 2420 : const char *basedir = NULL;
3060 2420 : const char *snapsharepath = NULL;
3061 : const char *mount_point;
3062 :
3063 2420 : DBG_DEBUG("cnum[%" PRIu32 "], connectpath[%s]\n",
3064 : handle->conn->cnum,
3065 : handle->conn->connectpath);
3066 :
3067 2420 : ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
3068 2420 : if (ret < 0) {
3069 0 : return ret;
3070 : }
3071 :
3072 2420 : priv = talloc_zero(handle->conn, struct shadow_copy2_private);
3073 2420 : if (priv == NULL) {
3074 0 : DBG_ERR("talloc_zero() failed\n");
3075 0 : errno = ENOMEM;
3076 0 : return -1;
3077 : }
3078 :
3079 2420 : priv->snaps = talloc_zero(priv, struct shadow_copy2_snaplist_info);
3080 2420 : if (priv->snaps == NULL) {
3081 0 : DBG_ERR("talloc_zero() failed\n");
3082 0 : errno = ENOMEM;
3083 0 : return -1;
3084 : }
3085 :
3086 2420 : config = talloc_zero(priv, struct shadow_copy2_config);
3087 2420 : if (config == NULL) {
3088 0 : DEBUG(0, ("talloc_zero() failed\n"));
3089 0 : errno = ENOMEM;
3090 0 : return -1;
3091 : }
3092 :
3093 2420 : priv->config = config;
3094 :
3095 2420 : gmt_format = lp_parm_const_string(SNUM(handle->conn),
3096 : "shadow", "format",
3097 : GMT_FORMAT);
3098 2420 : config->gmt_format = talloc_strdup(config, gmt_format);
3099 2420 : if (config->gmt_format == NULL) {
3100 0 : DEBUG(0, ("talloc_strdup() failed\n"));
3101 0 : errno = ENOMEM;
3102 0 : return -1;
3103 : }
3104 :
3105 : /* config->gmt_format must not contain a path separator. */
3106 2420 : if (strchr(config->gmt_format, '/') != NULL) {
3107 0 : DEBUG(0, ("shadow:format %s must not contain a /"
3108 : "character. Unable to initialize module.\n",
3109 : config->gmt_format));
3110 0 : errno = EINVAL;
3111 0 : return -1;
3112 : }
3113 :
3114 2420 : config->use_sscanf = lp_parm_bool(SNUM(handle->conn),
3115 : "shadow", "sscanf", false);
3116 :
3117 2420 : config->use_localtime = lp_parm_bool(SNUM(handle->conn),
3118 : "shadow", "localtime",
3119 : false);
3120 :
3121 2420 : snapdir = lp_parm_const_string(SNUM(handle->conn),
3122 : "shadow", "snapdir",
3123 : ".snapshots");
3124 2420 : config->snapdir = talloc_strdup(config, snapdir);
3125 2420 : if (config->snapdir == NULL) {
3126 0 : DEBUG(0, ("talloc_strdup() failed\n"));
3127 0 : errno = ENOMEM;
3128 0 : return -1;
3129 : }
3130 :
3131 2420 : snapprefix = lp_parm_const_string(SNUM(handle->conn),
3132 : "shadow", "snapprefix",
3133 : NULL);
3134 2420 : if (snapprefix != NULL) {
3135 72 : priv->snaps->regex = talloc_zero(priv->snaps, regex_t);
3136 72 : if (priv->snaps->regex == NULL) {
3137 0 : DBG_ERR("talloc_zero() failed\n");
3138 0 : errno = ENOMEM;
3139 0 : return -1;
3140 : }
3141 :
3142 : /* pre-compute regex rule for matching pattern later */
3143 72 : ret = regcomp(priv->snaps->regex, snapprefix, 0);
3144 72 : if (ret) {
3145 0 : DBG_ERR("Failed to create regex object\n");
3146 0 : return -1;
3147 : }
3148 : }
3149 :
3150 2420 : delimiter = lp_parm_const_string(SNUM(handle->conn),
3151 : "shadow", "delimiter",
3152 : "_GMT");
3153 2420 : if (delimiter != NULL) {
3154 2420 : priv->config->delimiter = talloc_strdup(priv->config, delimiter);
3155 2420 : if (priv->config->delimiter == NULL) {
3156 0 : DBG_ERR("talloc_strdup() failed\n");
3157 0 : errno = ENOMEM;
3158 0 : return -1;
3159 : }
3160 : }
3161 :
3162 2420 : config->snapdirseverywhere = lp_parm_bool(SNUM(handle->conn),
3163 : "shadow",
3164 : "snapdirseverywhere",
3165 : false);
3166 :
3167 2420 : config->crossmountpoints = lp_parm_bool(SNUM(handle->conn),
3168 : "shadow", "crossmountpoints",
3169 : false);
3170 :
3171 2420 : if (config->crossmountpoints && !config->snapdirseverywhere) {
3172 0 : DBG_WARNING("Warning: 'crossmountpoints' depends on "
3173 : "'snapdirseverywhere'. Disabling crossmountpoints.\n");
3174 : }
3175 :
3176 2420 : config->fixinodes = lp_parm_bool(SNUM(handle->conn),
3177 : "shadow", "fixinodes",
3178 : false);
3179 :
3180 2420 : sort_order = lp_parm_const_string(SNUM(handle->conn),
3181 : "shadow", "sort", "desc");
3182 2420 : config->sort_order = talloc_strdup(config, sort_order);
3183 2420 : if (config->sort_order == NULL) {
3184 0 : DEBUG(0, ("talloc_strdup() failed\n"));
3185 0 : errno = ENOMEM;
3186 0 : return -1;
3187 : }
3188 :
3189 2420 : mount_point = lp_parm_const_string(SNUM(handle->conn),
3190 : "shadow", "mountpoint", NULL);
3191 2420 : if (mount_point != NULL) {
3192 2302 : if (mount_point[0] != '/') {
3193 0 : DBG_WARNING("Warning: 'mountpoint' is relative "
3194 : "('%s'), but it has to be an absolute "
3195 : "path. Ignoring provided value.\n",
3196 : mount_point);
3197 0 : mount_point = NULL;
3198 : } else {
3199 : char *p;
3200 2302 : p = strstr(handle->conn->connectpath, mount_point);
3201 2302 : if (p != handle->conn->connectpath) {
3202 0 : DBG_WARNING("Warning: the share root (%s) is "
3203 : "not a subdirectory of the "
3204 : "specified mountpoint (%s). "
3205 : "Ignoring provided value.\n",
3206 : handle->conn->connectpath,
3207 : mount_point);
3208 0 : mount_point = NULL;
3209 : }
3210 : }
3211 : }
3212 :
3213 2420 : if (mount_point != NULL) {
3214 2302 : config->mount_point = talloc_strdup(config, mount_point);
3215 2302 : if (config->mount_point == NULL) {
3216 0 : DBG_ERR("talloc_strdup() failed\n");
3217 0 : return -1;
3218 : }
3219 : } else {
3220 118 : config->mount_point = shadow_copy2_find_mount_point(config,
3221 : handle);
3222 118 : if (config->mount_point == NULL) {
3223 0 : DBG_WARNING("shadow_copy2_find_mount_point "
3224 : "of the share root '%s' failed: %s\n",
3225 : handle->conn->connectpath, strerror(errno));
3226 0 : return -1;
3227 : }
3228 : }
3229 :
3230 2420 : basedir = lp_parm_const_string(SNUM(handle->conn),
3231 : "shadow", "basedir", NULL);
3232 :
3233 2420 : if (basedir != NULL) {
3234 528 : if (basedir[0] != '/') {
3235 0 : DBG_WARNING("Warning: 'basedir' is "
3236 : "relative ('%s'), but it has to be an "
3237 : "absolute path. Disabling basedir.\n",
3238 : basedir);
3239 0 : basedir = NULL;
3240 : } else {
3241 : char *p;
3242 528 : p = strstr(basedir, config->mount_point);
3243 528 : if (p != basedir) {
3244 0 : DEBUG(1, ("Warning: basedir (%s) is not a "
3245 : "subdirectory of the share root's "
3246 : "mount point (%s). "
3247 : "Disabling basedir\n",
3248 : basedir, config->mount_point));
3249 0 : basedir = NULL;
3250 : }
3251 : }
3252 : }
3253 :
3254 2420 : if (config->snapdirseverywhere && basedir != NULL) {
3255 0 : DBG_WARNING("Warning: 'basedir' is incompatible "
3256 : "with 'snapdirseverywhere'. Disabling basedir.\n");
3257 0 : basedir = NULL;
3258 : }
3259 :
3260 2420 : snapsharepath = lp_parm_const_string(SNUM(handle->conn), "shadow",
3261 : "snapsharepath", NULL);
3262 2420 : if (snapsharepath != NULL) {
3263 174 : if (snapsharepath[0] == '/') {
3264 0 : DBG_WARNING("Warning: 'snapsharepath' is "
3265 : "absolute ('%s'), but it has to be a "
3266 : "relative path. Disabling snapsharepath.\n",
3267 : snapsharepath);
3268 0 : snapsharepath = NULL;
3269 : }
3270 174 : if (config->snapdirseverywhere && snapsharepath != NULL) {
3271 0 : DBG_WARNING("Warning: 'snapsharepath' is incompatible "
3272 : "with 'snapdirseverywhere'. Disabling "
3273 : "snapsharepath.\n");
3274 0 : snapsharepath = NULL;
3275 : }
3276 : }
3277 :
3278 2420 : if (basedir != NULL && snapsharepath != NULL) {
3279 0 : DBG_WARNING("Warning: 'snapsharepath' is incompatible with "
3280 : "'basedir'. Disabling snapsharepath\n");
3281 0 : snapsharepath = NULL;
3282 : }
3283 :
3284 2420 : if (snapsharepath != NULL) {
3285 174 : config->rel_connectpath = talloc_strdup(config, snapsharepath);
3286 174 : if (config->rel_connectpath == NULL) {
3287 0 : DBG_ERR("talloc_strdup() failed\n");
3288 0 : errno = ENOMEM;
3289 0 : return -1;
3290 : }
3291 : }
3292 :
3293 2420 : if (basedir == NULL) {
3294 1892 : basedir = config->mount_point;
3295 : }
3296 :
3297 2420 : if (config->rel_connectpath == NULL &&
3298 2246 : strlen(basedir) < strlen(handle->conn->connectpath)) {
3299 3748 : config->rel_connectpath = talloc_strdup(config,
3300 1874 : handle->conn->connectpath + strlen(basedir));
3301 1874 : if (config->rel_connectpath == NULL) {
3302 0 : DEBUG(0, ("talloc_strdup() failed\n"));
3303 0 : errno = ENOMEM;
3304 0 : return -1;
3305 : }
3306 : }
3307 :
3308 2420 : if (config->snapdir[0] == '/') {
3309 1156 : config->snapdir_absolute = true;
3310 :
3311 1156 : if (config->snapdirseverywhere) {
3312 0 : DBG_WARNING("Warning: An absolute snapdir is "
3313 : "incompatible with 'snapdirseverywhere', "
3314 : "setting 'snapdirseverywhere' to "
3315 : "false.\n");
3316 0 : config->snapdirseverywhere = false;
3317 : }
3318 :
3319 1156 : if (config->crossmountpoints) {
3320 0 : DBG_WARNING("Warning: 'crossmountpoints' is not "
3321 : "supported with an absolute snapdir. "
3322 : "Disabling it.\n");
3323 0 : config->crossmountpoints = false;
3324 : }
3325 :
3326 1156 : config->snapshot_basepath = config->snapdir;
3327 : } else {
3328 1264 : config->snapshot_basepath = talloc_asprintf(config, "%s/%s",
3329 : config->mount_point, config->snapdir);
3330 1264 : if (config->snapshot_basepath == NULL) {
3331 0 : DEBUG(0, ("talloc_asprintf() failed\n"));
3332 0 : errno = ENOMEM;
3333 0 : return -1;
3334 : }
3335 : }
3336 :
3337 2420 : trim_string(config->mount_point, NULL, "/");
3338 2420 : trim_string(config->rel_connectpath, "/", "/");
3339 2420 : trim_string(config->snapdir, NULL, "/");
3340 2420 : trim_string(config->snapshot_basepath, NULL, "/");
3341 :
3342 2420 : DEBUG(10, ("shadow_copy2_connect: configuration:\n"
3343 : " share root: '%s'\n"
3344 : " mountpoint: '%s'\n"
3345 : " rel share root: '%s'\n"
3346 : " snapdir: '%s'\n"
3347 : " snapprefix: '%s'\n"
3348 : " delimiter: '%s'\n"
3349 : " snapshot base path: '%s'\n"
3350 : " format: '%s'\n"
3351 : " use sscanf: %s\n"
3352 : " snapdirs everywhere: %s\n"
3353 : " cross mountpoints: %s\n"
3354 : " fix inodes: %s\n"
3355 : " sort order: %s\n"
3356 : "",
3357 : handle->conn->connectpath,
3358 : config->mount_point,
3359 : config->rel_connectpath,
3360 : config->snapdir,
3361 : snapprefix,
3362 : config->delimiter,
3363 : config->snapshot_basepath,
3364 : config->gmt_format,
3365 : config->use_sscanf ? "yes" : "no",
3366 : config->snapdirseverywhere ? "yes" : "no",
3367 : config->crossmountpoints ? "yes" : "no",
3368 : config->fixinodes ? "yes" : "no",
3369 : config->sort_order
3370 : ));
3371 :
3372 :
3373 2420 : SMB_VFS_HANDLE_SET_DATA(handle, priv,
3374 : NULL, struct shadow_copy2_private,
3375 : return -1);
3376 :
3377 2420 : return 0;
3378 : }
3379 :
3380 : static struct vfs_fn_pointers vfs_shadow_copy2_fns = {
3381 : .connect_fn = shadow_copy2_connect,
3382 : .disk_free_fn = shadow_copy2_disk_free,
3383 : .get_quota_fn = shadow_copy2_get_quota,
3384 : .create_dfs_pathat_fn = shadow_copy2_create_dfs_pathat,
3385 : .read_dfs_pathat_fn = shadow_copy2_read_dfs_pathat,
3386 : .renameat_fn = shadow_copy2_renameat,
3387 : .linkat_fn = shadow_copy2_linkat,
3388 : .symlinkat_fn = shadow_copy2_symlinkat,
3389 : .stat_fn = shadow_copy2_stat,
3390 : .lstat_fn = shadow_copy2_lstat,
3391 : .fstat_fn = shadow_copy2_fstat,
3392 : .fstatat_fn = shadow_copy2_fstatat,
3393 : .openat_fn = shadow_copy2_openat,
3394 : .unlinkat_fn = shadow_copy2_unlinkat,
3395 : .fchmod_fn = shadow_copy2_fchmod,
3396 : .chdir_fn = shadow_copy2_chdir,
3397 : .fntimes_fn = shadow_copy2_fntimes,
3398 : .readlinkat_fn = shadow_copy2_readlinkat,
3399 : .mknodat_fn = shadow_copy2_mknodat,
3400 : .realpath_fn = shadow_copy2_realpath,
3401 : .get_shadow_copy_data_fn = shadow_copy2_get_shadow_copy_data,
3402 : .mkdirat_fn = shadow_copy2_mkdirat,
3403 : .fsetxattr_fn = shadow_copy2_fsetxattr,
3404 : .fchflags_fn = shadow_copy2_fchflags,
3405 : .get_real_filename_at_fn = shadow_copy2_get_real_filename_at,
3406 : .pwrite_fn = shadow_copy2_pwrite,
3407 : .pwrite_send_fn = shadow_copy2_pwrite_send,
3408 : .pwrite_recv_fn = shadow_copy2_pwrite_recv,
3409 : .connectpath_fn = shadow_copy2_connectpath,
3410 : .parent_pathname_fn = shadow_copy2_parent_pathname,
3411 : };
3412 :
3413 : static_decl_vfs;
3414 2251 : NTSTATUS vfs_shadow_copy2_init(TALLOC_CTX *ctx)
3415 : {
3416 2251 : return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
3417 : "shadow_copy2", &vfs_shadow_copy2_fns);
3418 : }
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