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 10304 : 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 10304 : num_offsets = 0;
229 :
230 10304 : p = str;
231 137716 : while ((p = strchr(p, '/')) != NULL) {
232 127412 : num_offsets += 1;
233 127412 : p += 1;
234 : }
235 :
236 10304 : offsets = talloc_array(mem_ctx, size_t, num_offsets);
237 10304 : if (offsets == NULL) {
238 0 : return false;
239 : }
240 :
241 10304 : p = str;
242 10304 : num_offsets = 0;
243 137716 : while ((p = strchr(p, '/')) != NULL) {
244 127412 : offsets[num_offsets] = p-str;
245 127412 : num_offsets += 1;
246 127412 : p += 1;
247 : }
248 :
249 10304 : *poffsets = offsets;
250 10304 : *pnum_offsets = num_offsets;
251 10304 : return true;
252 : }
253 :
254 : /**
255 : * Given a timestamp, build the posix level GMT-tag string
256 : * based on the configurable format.
257 : */
258 31694 : 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 31694 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
269 : return 0);
270 :
271 31694 : config = priv->config;
272 :
273 31694 : 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 31694 : 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 31694 : if (gmtime_r(&snapshot, &snap_tm) == 0) {
290 0 : DEBUG(10, ("gmtime_r failed\n"));
291 0 : return -1;
292 : }
293 : }
294 :
295 31694 : 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 31106 : snaptime_len = strftime(snaptime_string,
317 : len,
318 31106 : config->gmt_format,
319 : &snap_tm);
320 31106 : if (snaptime_len == 0) {
321 0 : DEBUG(10, ("strftime failed\n"));
322 0 : return -1;
323 : }
324 : }
325 :
326 31106 : 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 10304 : 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 10304 : ssize_t snaptime_len = 0;
346 10304 : char *result = NULL;
347 : struct shadow_copy2_config *config;
348 : struct shadow_copy2_private *priv;
349 :
350 10304 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
351 : return NULL);
352 :
353 10304 : config = priv->config;
354 :
355 10304 : snaptime_len = shadow_copy2_posix_gmt_string(handle,
356 : snapshot,
357 : snaptime_string,
358 : sizeof(snaptime_string));
359 10304 : if (snaptime_len <= 0) {
360 0 : return NULL;
361 : }
362 :
363 10304 : if (config->snapdir_absolute) {
364 0 : result = talloc_asprintf(mem_ctx, "%s/%s",
365 : config->snapdir, snaptime_string);
366 : } else {
367 10304 : result = talloc_asprintf(mem_ctx, "/%s/%s",
368 : config->snapdir, snaptime_string);
369 : }
370 10304 : if (result == NULL) {
371 0 : DBG_WARNING("talloc_asprintf failed\n");
372 : }
373 :
374 10304 : 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 21390 : 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 21390 : ssize_t snaptime_len = 0;
391 21390 : char *result = NULL;
392 : struct shadow_copy2_private *priv;
393 :
394 21390 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
395 : return NULL);
396 :
397 21390 : snaptime_len = shadow_copy2_posix_gmt_string(handle,
398 : snapshot,
399 : snaptime_string,
400 : sizeof(snaptime_string));
401 21390 : if (snaptime_len <= 0) {
402 0 : return NULL;
403 : }
404 :
405 21390 : result = talloc_asprintf(mem_ctx, "%s/%s",
406 21390 : priv->config->snapshot_basepath, snaptime_string);
407 21390 : if (result == NULL) {
408 0 : DBG_WARNING("talloc_asprintf failed\n");
409 : }
410 :
411 21390 : return result;
412 : }
413 :
414 154513 : static char *make_path_absolute(TALLOC_CTX *mem_ctx,
415 : struct shadow_copy2_private *priv,
416 : const char *name)
417 : {
418 154513 : char *newpath = NULL;
419 154513 : char *abs_path = NULL;
420 :
421 154513 : if (name[0] != '/') {
422 95462 : newpath = talloc_asprintf(mem_ctx,
423 : "%s/%s",
424 : priv->shadow_cwd,
425 : name);
426 95462 : if (newpath == NULL) {
427 0 : return NULL;
428 : }
429 95462 : name = newpath;
430 : }
431 154513 : abs_path = canonicalize_absolute_path(mem_ctx, name);
432 154513 : TALLOC_FREE(newpath);
433 154513 : return abs_path;
434 : }
435 :
436 : /* Return a $cwd-relative path. */
437 31694 : static bool make_relative_path(const char *cwd, char *abs_path)
438 : {
439 31694 : size_t cwd_len = strlen(cwd);
440 31694 : size_t abs_len = strlen(abs_path);
441 :
442 31694 : if (abs_len < cwd_len) {
443 0 : return false;
444 : }
445 31694 : if (memcmp(abs_path, cwd, cwd_len) != 0) {
446 0 : return false;
447 : }
448 : /* The cwd_len != 1 case is for $cwd == '/' */
449 31694 : if (cwd_len != 1 &&
450 31694 : abs_path[cwd_len] != '/' &&
451 1992 : abs_path[cwd_len] != '\0')
452 : {
453 0 : return false;
454 : }
455 31694 : if (abs_path[cwd_len] == '/') {
456 29702 : cwd_len++;
457 : }
458 31694 : memmove(abs_path, &abs_path[cwd_len], abs_len + 1 - cwd_len);
459 31694 : 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 139841 : 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 139841 : size_t snapdirlen = 0;
481 139841 : char *p = strstr_m(abs_path, priv->config->snapdir);
482 139841 : char *q = NULL;
483 139841 : char *connect_path = NULL;
484 : char snapshot[GMT_NAME_LEN+1];
485 :
486 139841 : *ppath_already_converted = false;
487 :
488 139841 : if (p == NULL) {
489 : /* Must at least contain shadow:snapdir. */
490 137226 : return 0;
491 : }
492 :
493 2615 : 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 2615 : snapdirlen = strlen(priv->config->snapdir);
500 2615 : if (p[snapdirlen] != '/') {
501 : /* shadow:snapdir must end as a separate component. */
502 2534 : return 0;
503 : }
504 :
505 81 : if (p > abs_path && p[-1] != '/') {
506 : /* shadow:snapdir must start as a separate component. */
507 0 : return 0;
508 : }
509 :
510 81 : p += snapdirlen;
511 81 : 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 81 : q = strchr(p, '/');
519 81 : if (q == NULL) {
520 : /*
521 : * No next path component.
522 : * Use entire string.
523 : */
524 75 : 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 81 : 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 81 : 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 81 : 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 81 : if (pconnectpath != NULL) {
557 5 : *pconnectpath = connect_path;
558 : }
559 :
560 81 : *ppath_already_converted = true;
561 :
562 81 : DBG_DEBUG("path |%s| is already converted. "
563 : "connect path = |%s|\n",
564 : abs_path,
565 : connect_path);
566 :
567 81 : 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 139841 : 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 139841 : char *stripped = NULL;
596 : struct shadow_copy2_private *priv;
597 139841 : char *abs_path = NULL;
598 139841 : bool ret = true;
599 139841 : bool already_converted = false;
600 139841 : int err = 0;
601 :
602 139841 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
603 : return false);
604 :
605 139841 : DBG_DEBUG("[from %s()] Path '%s'\n",
606 : function, smb_fname_str_dbg(smb_fname));
607 :
608 139841 : if (_already_converted != NULL) {
609 74618 : *_already_converted = false;
610 : }
611 :
612 139841 : abs_path = make_path_absolute(mem_ctx, priv, smb_fname->base_name);
613 139841 : if (abs_path == NULL) {
614 0 : ret = false;
615 0 : goto out;
616 : }
617 :
618 139841 : DBG_DEBUG("abs path '%s'\n", abs_path);
619 :
620 139841 : err = check_for_converted_path(mem_ctx,
621 : handle,
622 : priv,
623 : abs_path,
624 : &already_converted,
625 : psnappath);
626 139841 : if (err != 0) {
627 : /* error in conversion. */
628 0 : ret = false;
629 0 : goto out;
630 : }
631 :
632 139841 : if (already_converted) {
633 81 : if (_already_converted != NULL) {
634 34 : *_already_converted = true;
635 : }
636 81 : goto out;
637 : }
638 :
639 139760 : if (smb_fname->twrp == 0) {
640 108066 : goto out;
641 : }
642 :
643 31694 : if (ptimestamp != NULL) {
644 31694 : *ptimestamp = nt_time_to_unix(smb_fname->twrp);
645 : }
646 :
647 31694 : if (pstripped != NULL) {
648 31694 : stripped = talloc_strdup(mem_ctx, abs_path);
649 31694 : if (stripped == NULL) {
650 0 : ret = false;
651 0 : goto out;
652 : }
653 :
654 31694 : if (smb_fname->base_name[0] != '/') {
655 31694 : ret = make_relative_path(priv->shadow_cwd, stripped);
656 31694 : 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 31694 : *pstripped = stripped;
666 : }
667 :
668 31694 : ret = true;
669 :
670 139841 : out:
671 139841 : TALLOC_FREE(abs_path);
672 139841 : 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 48910 : 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 48910 : 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 74618 : 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 74618 : 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 31694 : 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 31694 : char *result = NULL;
770 31694 : size_t *slashes = NULL;
771 : unsigned num_slashes;
772 31694 : char *path = NULL;
773 : size_t pathlen;
774 31694 : char *insert = NULL;
775 31694 : char *converted = NULL;
776 31694 : size_t insertlen, connectlen = 0;
777 31694 : 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 31694 : size_t in_share_offset = 0;
783 :
784 31694 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
785 : return NULL);
786 :
787 31694 : config = priv->config;
788 :
789 31694 : DEBUG(10, ("converting '%s'\n", name));
790 :
791 31694 : if (!config->snapdirseverywhere) {
792 : int ret;
793 : char *snapshot_path;
794 :
795 21390 : snapshot_path = shadow_copy2_snapshot_path(talloc_tos(),
796 : handle,
797 : timestamp);
798 21390 : if (snapshot_path == NULL) {
799 0 : goto fail;
800 : }
801 :
802 21390 : if (config->rel_connectpath == NULL) {
803 5312 : converted = talloc_asprintf(mem_ctx, "%s/%s",
804 : snapshot_path, name);
805 : } else {
806 16078 : converted = talloc_asprintf(mem_ctx, "%s/%s/%s",
807 : snapshot_path,
808 : config->rel_connectpath,
809 : name);
810 : }
811 21390 : if (converted == NULL) {
812 0 : goto fail;
813 : }
814 :
815 21390 : converted_fname = (struct smb_filename) {
816 : .base_name = converted,
817 : };
818 :
819 21390 : ret = SMB_VFS_NEXT_LSTAT(handle, &converted_fname);
820 21390 : DEBUG(10, ("Trying[not snapdirseverywhere] %s: %d (%s)\n",
821 : converted,
822 : ret, ret == 0 ? "ok" : strerror(errno)));
823 21390 : if (ret == 0) {
824 21376 : DEBUG(10, ("Found %s\n", converted));
825 21376 : result = converted;
826 21376 : converted = NULL;
827 21376 : 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 21376 : goto fail;
835 : } else {
836 14 : errno = ENOENT;
837 14 : goto fail;
838 : }
839 : /* never reached ... */
840 : }
841 :
842 10304 : connectlen = strlen(handle->conn->connectpath);
843 10304 : if (name[0] == 0) {
844 588 : path = talloc_strdup(mem_ctx, handle->conn->connectpath);
845 : } else {
846 9716 : path = talloc_asprintf(
847 9716 : mem_ctx, "%s/%s", handle->conn->connectpath, name);
848 : }
849 10304 : if (path == NULL) {
850 0 : errno = ENOMEM;
851 0 : goto fail;
852 : }
853 10304 : pathlen = talloc_get_size(path)-1;
854 :
855 10304 : if (!shadow_copy2_find_slashes(talloc_tos(), path,
856 : &slashes, &num_slashes)) {
857 0 : goto fail;
858 : }
859 :
860 10304 : insert = shadow_copy2_insert_string(talloc_tos(), handle, timestamp);
861 10304 : if (insert == NULL) {
862 0 : goto fail;
863 : }
864 10304 : 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 10304 : converted = talloc_array(mem_ctx, char, pathlen + insertlen + 1);
876 10304 : if (converted == NULL) {
877 0 : goto fail;
878 : }
879 :
880 10304 : if (path[pathlen-1] != '/') {
881 : /*
882 : * Append a fake slash to find the snapshot root
883 : */
884 : size_t *tmp;
885 10304 : tmp = talloc_realloc(talloc_tos(), slashes,
886 : size_t, num_slashes+1);
887 10304 : if (tmp == NULL) {
888 0 : goto fail;
889 : }
890 10304 : slashes = tmp;
891 10304 : slashes[num_slashes] = pathlen;
892 10304 : num_slashes += 1;
893 : }
894 :
895 10304 : min_offset = 0;
896 :
897 10304 : if (!config->crossmountpoints) {
898 10304 : min_offset = strlen(config->mount_point);
899 : }
900 :
901 10304 : memcpy(converted, path, pathlen+1);
902 10304 : converted[pathlen+insertlen] = '\0';
903 :
904 10304 : converted_fname = (struct smb_filename) {
905 : .base_name = converted,
906 : };
907 :
908 30812 : for (i = num_slashes-1; i>=0; i--) {
909 : int ret;
910 : size_t offset;
911 :
912 30812 : offset = slashes[i];
913 :
914 30812 : if (offset < min_offset) {
915 256 : errno = ENOENT;
916 256 : goto fail;
917 : }
918 :
919 30556 : if (offset >= connectlen) {
920 22310 : in_share_offset = offset;
921 : }
922 :
923 30556 : memcpy(converted+offset, insert, insertlen);
924 :
925 30556 : offset += insertlen;
926 30556 : memcpy(converted+offset, path + slashes[i],
927 30556 : pathlen - slashes[i]);
928 :
929 30556 : ret = SMB_VFS_NEXT_LSTAT(handle, &converted_fname);
930 :
931 30556 : DEBUG(10, ("Trying[snapdirseverywhere] %s: %d (%s)\n",
932 : converted,
933 : ret, ret == 0 ? "ok" : strerror(errno)));
934 30556 : if (ret == 0) {
935 : /* success */
936 10048 : if (snaproot_len != NULL) {
937 120 : *snaproot_len = in_share_offset + insertlen;
938 : }
939 10048 : break;
940 : }
941 20508 : 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 14364 : if (errno != ENOENT) {
950 : /* Other problem than "not found" */
951 0 : goto fail;
952 : }
953 : }
954 :
955 10048 : if (i >= 0) {
956 : /*
957 : * Found something
958 : */
959 10048 : DEBUG(10, ("Found %s\n", converted));
960 10048 : result = converted;
961 10048 : converted = NULL;
962 : } else {
963 0 : errno = ENOENT;
964 : }
965 31694 : fail:
966 31694 : if (result == NULL) {
967 270 : saved_errno = errno;
968 : }
969 31694 : TALLOC_FREE(converted);
970 31694 : TALLOC_FREE(insert);
971 31694 : TALLOC_FREE(slashes);
972 31694 : TALLOC_FREE(path);
973 31694 : if (saved_errno != 0) {
974 270 : errno = saved_errno;
975 : }
976 31694 : 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 31320 : static char *shadow_copy2_convert(TALLOC_CTX *mem_ctx,
985 : struct vfs_handle_struct *handle,
986 : const char *name, time_t timestamp)
987 : {
988 31320 : 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 14672 : 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 14672 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1001 : return);
1002 :
1003 14672 : 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 114 : TDB_DATA key = { .dptr = discard_const_p(uint8_t, fname),
1015 114 : .dsize = strlen(fname) };
1016 : uint32_t shash;
1017 :
1018 114 : shash = tdb_jenkins_hash(&key) & 0xFF000000;
1019 114 : if (shash == 0) {
1020 0 : shash = 1;
1021 : }
1022 114 : 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 35296 : static int shadow_copy2_stat(vfs_handle_struct *handle,
1170 : struct smb_filename *smb_fname)
1171 : {
1172 35296 : struct shadow_copy2_private *priv = NULL;
1173 35296 : time_t timestamp = 0;
1174 35296 : char *stripped = NULL;
1175 35296 : bool converted = false;
1176 35296 : char *abspath = NULL;
1177 : char *tmp;
1178 35296 : int ret = 0;
1179 :
1180 35296 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1181 : return -1);
1182 :
1183 35296 : 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 35296 : if (timestamp == 0) {
1192 35294 : TALLOC_FREE(stripped);
1193 35294 : ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
1194 35294 : if (ret != 0) {
1195 6 : return ret;
1196 : }
1197 35288 : if (!converted) {
1198 35276 : 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 35642 : static int shadow_copy2_fstat(vfs_handle_struct *handle, files_struct *fsp,
1324 : SMB_STRUCT_STAT *sbuf)
1325 : {
1326 35642 : struct shadow_copy2_private *priv = NULL;
1327 35642 : time_t timestamp = 0;
1328 35642 : struct smb_filename *orig_smb_fname = NULL;
1329 : struct smb_filename vss_smb_fname;
1330 35642 : struct smb_filename *orig_base_smb_fname = NULL;
1331 : struct smb_filename vss_base_smb_fname;
1332 35642 : char *stripped = NULL;
1333 35642 : char *abspath = NULL;
1334 35642 : bool converted = false;
1335 : bool ok;
1336 : int ret;
1337 :
1338 35642 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1339 : return -1);
1340 :
1341 35642 : ok = shadow_copy2_strip_snapshot_converted(talloc_tos(),
1342 : handle,
1343 : fsp->fsp_name,
1344 : ×tamp,
1345 : &stripped,
1346 : &converted);
1347 35642 : if (!ok) {
1348 0 : return -1;
1349 : }
1350 :
1351 35642 : if (timestamp == 0) {
1352 22528 : TALLOC_FREE(stripped);
1353 22528 : ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
1354 22528 : if (ret != 0) {
1355 0 : return ret;
1356 : }
1357 22528 : if (!converted) {
1358 22506 : return 0;
1359 : }
1360 :
1361 22 : abspath = make_path_absolute(talloc_tos(),
1362 : priv,
1363 22 : fsp->fsp_name->base_name);
1364 22 : if (abspath == NULL) {
1365 0 : return -1;
1366 : }
1367 :
1368 22 : convert_sbuf(handle, abspath, sbuf);
1369 22 : TALLOC_FREE(abspath);
1370 22 : return 0;
1371 : }
1372 :
1373 13114 : vss_smb_fname = *fsp->fsp_name;
1374 13114 : vss_smb_fname.base_name = shadow_copy2_convert(talloc_tos(),
1375 : handle,
1376 : stripped,
1377 : timestamp);
1378 13114 : TALLOC_FREE(stripped);
1379 13114 : if (vss_smb_fname.base_name == NULL) {
1380 0 : return -1;
1381 : }
1382 :
1383 13114 : orig_smb_fname = fsp->fsp_name;
1384 13114 : fsp->fsp_name = &vss_smb_fname;
1385 :
1386 13114 : 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 13114 : ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
1394 13114 : if (ret != 0) {
1395 0 : goto out;
1396 : }
1397 :
1398 13114 : abspath = make_path_absolute(talloc_tos(),
1399 : priv,
1400 13114 : fsp->fsp_name->base_name);
1401 13114 : if (abspath == NULL) {
1402 0 : ret = -1;
1403 0 : goto out;
1404 : }
1405 :
1406 13114 : convert_sbuf(handle, abspath, sbuf);
1407 13114 : TALLOC_FREE(abspath);
1408 :
1409 0 : out:
1410 13114 : fsp->fsp_name = orig_smb_fname;
1411 13114 : if (fsp_is_alternate_stream(fsp)) {
1412 4 : fsp->base_fsp->fsp_name = orig_base_smb_fname;
1413 : }
1414 :
1415 13114 : 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 28922 : 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 28922 : struct smb_filename *result = NULL;
1521 :
1522 28922 : 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 28912 : result = full_path_from_dirfsp_atname(
1543 : mem_ctx, dirfsp, smb_fname_in);
1544 : }
1545 :
1546 28922 : return result;
1547 : }
1548 :
1549 35996 : 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 35996 : struct vfs_open_how how = *_how;
1556 35996 : struct smb_filename *smb_fname = NULL;
1557 35996 : time_t timestamp = 0;
1558 35996 : char *stripped = NULL;
1559 35996 : int saved_errno = 0;
1560 : int ret;
1561 : bool ok;
1562 :
1563 35996 : if (how.resolve != 0) {
1564 7074 : errno = ENOSYS;
1565 7074 : return -1;
1566 : }
1567 :
1568 28922 : smb_fname = shadow_copy2_openat_name(
1569 : talloc_tos(), dirfsp, fsp, smb_fname_in);
1570 28922 : if (smb_fname == NULL) {
1571 0 : errno = ENOMEM;
1572 0 : return -1;
1573 : }
1574 :
1575 28922 : ok = shadow_copy2_strip_snapshot(talloc_tos(),
1576 : handle,
1577 : smb_fname,
1578 : ×tamp,
1579 : &stripped);
1580 28922 : if (!ok) {
1581 0 : TALLOC_FREE(smb_fname);
1582 0 : return -1;
1583 : }
1584 28922 : if (timestamp == 0) {
1585 17006 : TALLOC_FREE(stripped);
1586 17006 : TALLOC_FREE(smb_fname);
1587 17006 : return SMB_VFS_NEXT_OPENAT(handle,
1588 : dirfsp,
1589 : smb_fname_in,
1590 : fsp,
1591 : &how);
1592 : }
1593 :
1594 11916 : smb_fname->base_name = shadow_copy2_convert(smb_fname,
1595 : handle,
1596 : stripped,
1597 : timestamp);
1598 11916 : if (smb_fname->base_name == NULL) {
1599 202 : int err = errno;
1600 202 : TALLOC_FREE(stripped);
1601 202 : TALLOC_FREE(smb_fname);
1602 202 : errno = err;
1603 202 : return -1;
1604 : }
1605 11714 : TALLOC_FREE(stripped);
1606 :
1607 11714 : ret = SMB_VFS_NEXT_OPENAT(handle,
1608 : dirfsp,
1609 : smb_fname,
1610 : fsp,
1611 : &how);
1612 11714 : if (ret == -1) {
1613 1520 : saved_errno = errno;
1614 : }
1615 :
1616 11714 : TALLOC_FREE(smb_fname);
1617 :
1618 11714 : if (saved_errno != 0) {
1619 1520 : errno = saved_errno;
1620 : }
1621 11714 : return ret;
1622 : }
1623 :
1624 12 : static int shadow_copy2_unlinkat(vfs_handle_struct *handle,
1625 : struct files_struct *dirfsp,
1626 : const struct smb_filename *smb_fname,
1627 : int flags)
1628 : {
1629 12 : time_t timestamp = 0;
1630 :
1631 12 : if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1632 : smb_fname,
1633 : ×tamp, NULL)) {
1634 0 : return -1;
1635 : }
1636 12 : if (timestamp != 0) {
1637 0 : errno = EROFS;
1638 0 : return -1;
1639 : }
1640 12 : return SMB_VFS_NEXT_UNLINKAT(handle,
1641 : dirfsp,
1642 : smb_fname,
1643 : flags);
1644 : }
1645 :
1646 10 : static int shadow_copy2_fchmod(vfs_handle_struct *handle,
1647 : struct files_struct *fsp,
1648 : mode_t mode)
1649 : {
1650 10 : time_t timestamp = 0;
1651 10 : const struct smb_filename *smb_fname = NULL;
1652 :
1653 10 : smb_fname = fsp->fsp_name;
1654 10 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
1655 : handle,
1656 : smb_fname,
1657 : ×tamp,
1658 : NULL)) {
1659 0 : return -1;
1660 : }
1661 10 : if (timestamp != 0) {
1662 0 : errno = EROFS;
1663 0 : return -1;
1664 : }
1665 10 : return SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
1666 : }
1667 :
1668 16313 : static void store_cwd_data(vfs_handle_struct *handle,
1669 : const char *connectpath)
1670 : {
1671 16313 : struct shadow_copy2_private *priv = NULL;
1672 16313 : struct smb_filename *cwd_fname = NULL;
1673 :
1674 16313 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1675 : return);
1676 :
1677 16313 : TALLOC_FREE(priv->shadow_cwd);
1678 16313 : cwd_fname = SMB_VFS_NEXT_GETWD(handle, talloc_tos());
1679 16313 : if (cwd_fname == NULL) {
1680 0 : smb_panic("getwd failed\n");
1681 : }
1682 16313 : DBG_DEBUG("shadow cwd = %s\n", cwd_fname->base_name);
1683 16313 : priv->shadow_cwd = talloc_strdup(priv, cwd_fname->base_name);
1684 16313 : TALLOC_FREE(cwd_fname);
1685 16313 : if (priv->shadow_cwd == NULL) {
1686 0 : smb_panic("talloc failed\n");
1687 : }
1688 16313 : TALLOC_FREE(priv->shadow_connectpath);
1689 16313 : if (connectpath) {
1690 5 : DBG_DEBUG("shadow connectpath = %s\n", connectpath);
1691 5 : priv->shadow_connectpath = talloc_strdup(priv, connectpath);
1692 5 : if (priv->shadow_connectpath == NULL) {
1693 0 : smb_panic("talloc failed\n");
1694 : }
1695 : }
1696 : }
1697 :
1698 16313 : static int shadow_copy2_chdir(vfs_handle_struct *handle,
1699 : const struct smb_filename *smb_fname)
1700 : {
1701 16313 : time_t timestamp = 0;
1702 16313 : char *stripped = NULL;
1703 16313 : char *snappath = NULL;
1704 16313 : int ret = -1;
1705 16313 : int saved_errno = 0;
1706 16313 : char *conv = NULL;
1707 16313 : size_t rootpath_len = 0;
1708 16313 : struct smb_filename *conv_smb_fname = NULL;
1709 :
1710 16313 : if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1711 : handle,
1712 : smb_fname,
1713 : ×tamp,
1714 : &stripped,
1715 : &snappath,
1716 : NULL)) {
1717 0 : return -1;
1718 : }
1719 16313 : if (stripped != NULL) {
1720 0 : conv = shadow_copy2_do_convert(talloc_tos(),
1721 : handle,
1722 : stripped,
1723 : timestamp,
1724 : &rootpath_len);
1725 0 : TALLOC_FREE(stripped);
1726 0 : if (conv == NULL) {
1727 0 : return -1;
1728 : }
1729 0 : conv_smb_fname = synthetic_smb_fname(talloc_tos(),
1730 : conv,
1731 : NULL,
1732 : NULL,
1733 : 0,
1734 0 : smb_fname->flags);
1735 : } else {
1736 16313 : conv_smb_fname = cp_smb_filename(talloc_tos(), smb_fname);
1737 : }
1738 :
1739 16313 : if (conv_smb_fname == NULL) {
1740 0 : TALLOC_FREE(conv);
1741 0 : errno = ENOMEM;
1742 0 : return -1;
1743 : }
1744 :
1745 16313 : ret = SMB_VFS_NEXT_CHDIR(handle, conv_smb_fname);
1746 16313 : if (ret == -1) {
1747 0 : saved_errno = errno;
1748 : }
1749 :
1750 16313 : if (ret == 0) {
1751 16313 : if (conv != NULL && rootpath_len != 0) {
1752 0 : conv[rootpath_len] = '\0';
1753 16313 : } else if (snappath != 0) {
1754 5 : TALLOC_FREE(conv);
1755 5 : conv = snappath;
1756 : }
1757 16313 : store_cwd_data(handle, conv);
1758 : }
1759 :
1760 16313 : TALLOC_FREE(stripped);
1761 16313 : TALLOC_FREE(conv);
1762 16313 : TALLOC_FREE(conv_smb_fname);
1763 :
1764 16313 : if (saved_errno != 0) {
1765 0 : errno = saved_errno;
1766 : }
1767 16313 : return ret;
1768 : }
1769 :
1770 10 : static int shadow_copy2_fntimes(vfs_handle_struct *handle,
1771 : files_struct *fsp,
1772 : struct smb_file_time *ft)
1773 : {
1774 10 : time_t timestamp = 0;
1775 :
1776 10 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
1777 : handle,
1778 : fsp->fsp_name,
1779 : ×tamp,
1780 : NULL)) {
1781 0 : return -1;
1782 : }
1783 10 : if (timestamp != 0) {
1784 0 : errno = EROFS;
1785 0 : return -1;
1786 : }
1787 10 : return SMB_VFS_NEXT_FNTIMES(handle, fsp, ft);
1788 : }
1789 :
1790 2668 : static int shadow_copy2_readlinkat(vfs_handle_struct *handle,
1791 : const struct files_struct *dirfsp,
1792 : const struct smb_filename *smb_fname,
1793 : char *buf,
1794 : size_t bufsiz)
1795 : {
1796 2668 : time_t timestamp = 0;
1797 2668 : char *stripped = NULL;
1798 2668 : int saved_errno = 0;
1799 : int ret;
1800 2668 : struct smb_filename *full_fname = NULL;
1801 2668 : struct smb_filename *conv = NULL;
1802 :
1803 2668 : full_fname = full_path_from_dirfsp_atname(talloc_tos(),
1804 : dirfsp,
1805 : smb_fname);
1806 2668 : if (full_fname == NULL) {
1807 0 : errno = ENOMEM;
1808 0 : return -1;
1809 : }
1810 :
1811 2668 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
1812 : handle,
1813 : full_fname,
1814 : ×tamp,
1815 : &stripped)) {
1816 0 : TALLOC_FREE(full_fname);
1817 0 : return -1;
1818 : }
1819 :
1820 2668 : if (timestamp == 0) {
1821 186 : TALLOC_FREE(full_fname);
1822 186 : TALLOC_FREE(stripped);
1823 186 : return SMB_VFS_NEXT_READLINKAT(handle,
1824 : dirfsp,
1825 : smb_fname,
1826 : buf,
1827 : bufsiz);
1828 : }
1829 2482 : conv = cp_smb_filename(talloc_tos(), full_fname);
1830 2482 : if (conv == NULL) {
1831 0 : TALLOC_FREE(full_fname);
1832 0 : TALLOC_FREE(stripped);
1833 0 : errno = ENOMEM;
1834 0 : return -1;
1835 : }
1836 2482 : TALLOC_FREE(full_fname);
1837 2482 : conv->base_name = shadow_copy2_convert(
1838 : conv, handle, stripped, timestamp);
1839 2482 : TALLOC_FREE(stripped);
1840 2482 : if (conv->base_name == NULL) {
1841 0 : return -1;
1842 : }
1843 2482 : ret = SMB_VFS_NEXT_READLINKAT(handle,
1844 : handle->conn->cwd_fsp,
1845 : conv,
1846 : buf,
1847 : bufsiz);
1848 2482 : if (ret == -1) {
1849 0 : saved_errno = errno;
1850 : }
1851 2482 : TALLOC_FREE(conv);
1852 2482 : if (saved_errno != 0) {
1853 0 : errno = saved_errno;
1854 : }
1855 2482 : return ret;
1856 : }
1857 :
1858 0 : static int shadow_copy2_mknodat(vfs_handle_struct *handle,
1859 : files_struct *dirfsp,
1860 : const struct smb_filename *smb_fname,
1861 : mode_t mode,
1862 : SMB_DEV_T dev)
1863 : {
1864 0 : time_t timestamp = 0;
1865 :
1866 0 : if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1867 : smb_fname,
1868 : ×tamp, NULL)) {
1869 0 : return -1;
1870 : }
1871 0 : if (timestamp != 0) {
1872 0 : errno = EROFS;
1873 0 : return -1;
1874 : }
1875 0 : return SMB_VFS_NEXT_MKNODAT(handle,
1876 : dirfsp,
1877 : smb_fname,
1878 : mode,
1879 : dev);
1880 : }
1881 :
1882 10540 : static struct smb_filename *shadow_copy2_realpath(vfs_handle_struct *handle,
1883 : TALLOC_CTX *ctx,
1884 : const struct smb_filename *smb_fname)
1885 : {
1886 10540 : time_t timestamp = 0;
1887 10540 : char *stripped = NULL;
1888 10540 : struct smb_filename *result_fname = NULL;
1889 10540 : struct smb_filename *conv_fname = NULL;
1890 10540 : int saved_errno = 0;
1891 :
1892 10540 : if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1893 : smb_fname,
1894 : ×tamp, &stripped)) {
1895 0 : goto done;
1896 : }
1897 10540 : if (timestamp == 0) {
1898 10418 : return SMB_VFS_NEXT_REALPATH(handle, ctx, smb_fname);
1899 : }
1900 :
1901 122 : conv_fname = cp_smb_filename(talloc_tos(), smb_fname);
1902 122 : if (conv_fname == NULL) {
1903 0 : goto done;
1904 : }
1905 122 : conv_fname->base_name = shadow_copy2_convert(
1906 : conv_fname, handle, stripped, timestamp);
1907 122 : if (conv_fname->base_name == NULL) {
1908 0 : goto done;
1909 : }
1910 :
1911 122 : result_fname = SMB_VFS_NEXT_REALPATH(handle, ctx, conv_fname);
1912 :
1913 122 : done:
1914 122 : if (result_fname == NULL) {
1915 0 : saved_errno = errno;
1916 : }
1917 122 : TALLOC_FREE(conv_fname);
1918 122 : TALLOC_FREE(stripped);
1919 122 : if (saved_errno != 0) {
1920 0 : errno = saved_errno;
1921 : }
1922 122 : return result_fname;
1923 : }
1924 :
1925 : /**
1926 : * Check whether a given directory contains a
1927 : * snapshot directory as direct subdirectory.
1928 : * If yes, return the path of the snapshot-subdir,
1929 : * otherwise return NULL.
1930 : */
1931 2440 : static char *have_snapdir(struct vfs_handle_struct *handle,
1932 : TALLOC_CTX *mem_ctx,
1933 : const char *path)
1934 : {
1935 : struct smb_filename smb_fname;
1936 : int ret;
1937 : struct shadow_copy2_private *priv;
1938 :
1939 2440 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1940 : return NULL);
1941 :
1942 2440 : smb_fname = (struct smb_filename) {
1943 2440 : .base_name = talloc_asprintf(
1944 2440 : mem_ctx, "%s/%s", path, priv->config->snapdir),
1945 : };
1946 2440 : if (smb_fname.base_name == NULL) {
1947 0 : return NULL;
1948 : }
1949 :
1950 2440 : ret = SMB_VFS_NEXT_STAT(handle, &smb_fname);
1951 2440 : if ((ret == 0) && (S_ISDIR(smb_fname.st.st_ex_mode))) {
1952 744 : return smb_fname.base_name;
1953 : }
1954 1696 : TALLOC_FREE(smb_fname.base_name);
1955 1696 : return NULL;
1956 : }
1957 :
1958 : /**
1959 : * Find the snapshot directory (if any) for the given
1960 : * filename (which is relative to the share).
1961 : */
1962 2510 : static const char *shadow_copy2_find_snapdir(TALLOC_CTX *mem_ctx,
1963 : struct vfs_handle_struct *handle,
1964 : struct smb_filename *smb_fname)
1965 : {
1966 : char *path, *p;
1967 : const char *snapdir;
1968 : struct shadow_copy2_config *config;
1969 : struct shadow_copy2_private *priv;
1970 :
1971 2510 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1972 : return NULL);
1973 :
1974 2510 : config = priv->config;
1975 :
1976 : /*
1977 : * If the non-snapdisrseverywhere mode, we should not search!
1978 : */
1979 2510 : if (!config->snapdirseverywhere) {
1980 1766 : return config->snapshot_basepath;
1981 : }
1982 :
1983 744 : path = talloc_asprintf(mem_ctx, "%s/%s",
1984 744 : handle->conn->connectpath,
1985 : smb_fname->base_name);
1986 744 : if (path == NULL) {
1987 0 : return NULL;
1988 : }
1989 :
1990 744 : snapdir = have_snapdir(handle, talloc_tos(), path);
1991 744 : if (snapdir != NULL) {
1992 8 : TALLOC_FREE(path);
1993 8 : return snapdir;
1994 : }
1995 :
1996 1696 : while ((p = strrchr(path, '/')) && (p > path)) {
1997 :
1998 1696 : p[0] = '\0';
1999 :
2000 1696 : snapdir = have_snapdir(handle, talloc_tos(), path);
2001 1696 : if (snapdir != NULL) {
2002 736 : TALLOC_FREE(path);
2003 736 : return snapdir;
2004 : }
2005 : }
2006 0 : TALLOC_FREE(path);
2007 0 : return NULL;
2008 : }
2009 :
2010 15031 : static bool shadow_copy2_snapshot_to_gmt(vfs_handle_struct *handle,
2011 : const char *name,
2012 : char *gmt, size_t gmt_len)
2013 : {
2014 15031 : struct tm timestamp = { .tm_sec = 0, };
2015 : time_t timestamp_t;
2016 : unsigned long int timestamp_long;
2017 : const char *fmt;
2018 : struct shadow_copy2_config *config;
2019 : struct shadow_copy2_private *priv;
2020 15031 : char *tmpstr = NULL;
2021 15031 : char *tmp = NULL;
2022 15031 : bool converted = false;
2023 15031 : int ret = -1;
2024 :
2025 15031 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2026 : return NULL);
2027 :
2028 15031 : config = priv->config;
2029 :
2030 15031 : fmt = config->gmt_format;
2031 :
2032 : /*
2033 : * If regex is provided, then we will have to parse the
2034 : * filename which will contain both the prefix and the time format.
2035 : * e.g. <prefix><delimiter><time_format>
2036 : */
2037 15031 : if (priv->snaps->regex != NULL) {
2038 1104 : tmpstr = talloc_strdup(talloc_tos(), name);
2039 : /* point "name" to the time format */
2040 1104 : name = strstr(name, priv->config->delimiter);
2041 1104 : if (name == NULL) {
2042 620 : goto done;
2043 : }
2044 : /* Extract the prefix */
2045 484 : tmp = strstr(tmpstr, priv->config->delimiter);
2046 484 : if (tmp == NULL) {
2047 0 : goto done;
2048 : }
2049 484 : *tmp = '\0';
2050 :
2051 : /* Parse regex */
2052 484 : ret = regexec(priv->snaps->regex, tmpstr, 0, NULL, 0);
2053 484 : if (ret) {
2054 40 : DBG_DEBUG("shadow_copy2_snapshot_to_gmt: "
2055 : "no regex match for %s\n", tmpstr);
2056 40 : goto done;
2057 : }
2058 : }
2059 :
2060 14371 : if (config->use_sscanf) {
2061 0 : if (sscanf(name, fmt, ×tamp_long) != 1) {
2062 0 : DEBUG(10, ("shadow_copy2_snapshot_to_gmt: "
2063 : "no sscanf match %s: %s\n",
2064 : fmt, name));
2065 0 : goto done;
2066 : }
2067 0 : timestamp_t = timestamp_long;
2068 0 : gmtime_r(×tamp_t, ×tamp);
2069 : } else {
2070 14371 : if (strptime(name, fmt, ×tamp) == NULL) {
2071 6804 : DEBUG(10, ("shadow_copy2_snapshot_to_gmt: "
2072 : "no match %s: %s\n",
2073 : fmt, name));
2074 6804 : goto done;
2075 : }
2076 7567 : DEBUG(10, ("shadow_copy2_snapshot_to_gmt: match %s: %s\n",
2077 : fmt, name));
2078 :
2079 7567 : if (config->use_localtime) {
2080 0 : timestamp.tm_isdst = -1;
2081 0 : timestamp_t = mktime(×tamp);
2082 0 : gmtime_r(×tamp_t, ×tamp);
2083 : }
2084 : }
2085 :
2086 7567 : strftime(gmt, gmt_len, GMT_FORMAT, ×tamp);
2087 7567 : converted = true;
2088 :
2089 15031 : done:
2090 15031 : TALLOC_FREE(tmpstr);
2091 15031 : return converted;
2092 : }
2093 :
2094 0 : static int shadow_copy2_label_cmp_asc(const void *x, const void *y)
2095 : {
2096 0 : return strncmp((const char *)x, (const char *)y, sizeof(SHADOW_COPY_LABEL));
2097 : }
2098 :
2099 4872 : static int shadow_copy2_label_cmp_desc(const void *x, const void *y)
2100 : {
2101 4872 : return -strncmp((const char *)x, (const char *)y, sizeof(SHADOW_COPY_LABEL));
2102 : }
2103 :
2104 : /*
2105 : sort the shadow copy data in ascending or descending order
2106 : */
2107 2510 : static void shadow_copy2_sort_data(vfs_handle_struct *handle,
2108 : struct shadow_copy_data *shadow_copy2_data)
2109 : {
2110 : int (*cmpfunc)(const void *, const void *);
2111 : const char *sort;
2112 : struct shadow_copy2_private *priv;
2113 :
2114 2510 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2115 : return);
2116 :
2117 2510 : sort = priv->config->sort_order;
2118 2510 : if (sort == NULL) {
2119 0 : return;
2120 : }
2121 :
2122 2510 : if (strcmp(sort, "asc") == 0) {
2123 0 : cmpfunc = shadow_copy2_label_cmp_asc;
2124 2510 : } else if (strcmp(sort, "desc") == 0) {
2125 2510 : cmpfunc = shadow_copy2_label_cmp_desc;
2126 : } else {
2127 0 : return;
2128 : }
2129 :
2130 2510 : if (shadow_copy2_data && shadow_copy2_data->num_volumes > 0 &&
2131 2480 : shadow_copy2_data->labels)
2132 : {
2133 1238 : TYPESAFE_QSORT(shadow_copy2_data->labels,
2134 : shadow_copy2_data->num_volumes,
2135 : cmpfunc);
2136 : }
2137 : }
2138 :
2139 2510 : static int shadow_copy2_get_shadow_copy_data(
2140 : vfs_handle_struct *handle, files_struct *fsp,
2141 : struct shadow_copy_data *shadow_copy2_data,
2142 : bool labels)
2143 : {
2144 2510 : DIR *p = NULL;
2145 : const char *snapdir;
2146 2510 : struct smb_filename *snapdir_smb_fname = NULL;
2147 2510 : struct files_struct *dirfsp = NULL;
2148 2510 : struct files_struct *fspcwd = NULL;
2149 : struct dirent *d;
2150 2510 : TALLOC_CTX *tmp_ctx = talloc_stackframe();
2151 2510 : struct shadow_copy2_private *priv = NULL;
2152 2510 : struct shadow_copy2_snapentry *tmpentry = NULL;
2153 2510 : bool get_snaplist = false;
2154 2510 : struct vfs_open_how how = {
2155 : .flags = O_RDONLY, .mode = 0,
2156 : };
2157 : int fd;
2158 2510 : int ret = -1;
2159 : NTSTATUS status;
2160 2510 : int saved_errno = 0;
2161 :
2162 2510 : snapdir = shadow_copy2_find_snapdir(tmp_ctx, handle, fsp->fsp_name);
2163 2510 : if (snapdir == NULL) {
2164 0 : DEBUG(0,("shadow:snapdir not found for %s in get_shadow_copy_data\n",
2165 : handle->conn->connectpath));
2166 0 : errno = EINVAL;
2167 0 : goto done;
2168 : }
2169 :
2170 2510 : snapdir_smb_fname = synthetic_smb_fname(talloc_tos(),
2171 : snapdir,
2172 : NULL,
2173 : NULL,
2174 : 0,
2175 2510 : fsp->fsp_name->flags);
2176 2510 : if (snapdir_smb_fname == NULL) {
2177 0 : errno = ENOMEM;
2178 0 : goto done;
2179 : }
2180 :
2181 2510 : status = create_internal_dirfsp(handle->conn,
2182 : snapdir_smb_fname,
2183 : &dirfsp);
2184 2510 : if (!NT_STATUS_IS_OK(status)) {
2185 0 : DBG_WARNING("create_internal_dir_fsp() failed for '%s'"
2186 : " - %s\n", snapdir, nt_errstr(status));
2187 0 : errno = ENOSYS;
2188 0 : goto done;
2189 : }
2190 :
2191 2510 : status = vfs_at_fspcwd(talloc_tos(), handle->conn, &fspcwd);
2192 2510 : if (!NT_STATUS_IS_OK(status)) {
2193 0 : errno = ENOMEM;
2194 0 : goto done;
2195 : }
2196 :
2197 : #ifdef O_DIRECTORY
2198 2510 : how.flags |= O_DIRECTORY;
2199 : #endif
2200 :
2201 2510 : fd = SMB_VFS_NEXT_OPENAT(handle,
2202 : fspcwd,
2203 : snapdir_smb_fname,
2204 : dirfsp,
2205 : &how);
2206 2510 : if (fd == -1) {
2207 0 : DBG_WARNING("SMB_VFS_NEXT_OPEN failed for '%s'"
2208 : " - %s\n", snapdir, strerror(errno));
2209 0 : errno = ENOSYS;
2210 0 : goto done;
2211 : }
2212 2510 : fsp_set_fd(dirfsp, fd);
2213 :
2214 : /* Now we have the handle, check access here. */
2215 2510 : status = smbd_check_access_rights_fsp(fspcwd,
2216 : dirfsp,
2217 : false,
2218 : SEC_DIR_LIST);
2219 2510 : if (!NT_STATUS_IS_OK(status)) {
2220 0 : DBG_ERR("user does not have list permission "
2221 : "on snapdir %s\n",
2222 : fsp_str_dbg(dirfsp));
2223 0 : errno = EACCES;
2224 0 : goto done;
2225 : }
2226 :
2227 2510 : p = SMB_VFS_NEXT_FDOPENDIR(handle, dirfsp, NULL, 0);
2228 2510 : if (!p) {
2229 0 : DBG_NOTICE("shadow_copy2: SMB_VFS_NEXT_FDOPENDIR() failed for '%s'"
2230 : " - %s\n", snapdir, strerror(errno));
2231 0 : errno = ENOSYS;
2232 0 : goto done;
2233 : }
2234 :
2235 2510 : if (shadow_copy2_data != NULL) {
2236 2482 : shadow_copy2_data->num_volumes = 0;
2237 2482 : shadow_copy2_data->labels = NULL;
2238 : }
2239 :
2240 2510 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2241 : goto done);
2242 :
2243 : /*
2244 : * Normally this function is called twice once with labels = false and
2245 : * then with labels = true. When labels is false it will return the
2246 : * number of volumes so that the caller can allocate memory for that
2247 : * many labels. Therefore to eliminate snaplist both the times it is
2248 : * good to check if labels is set or not.
2249 : *
2250 : * shadow_copy2_data is NULL when we only want to update the list and
2251 : * don't want any labels.
2252 : */
2253 2510 : if ((priv->snaps->regex != NULL) && (labels || shadow_copy2_data == NULL)) {
2254 60 : get_snaplist = true;
2255 : /* Reset the global snaplist */
2256 60 : shadow_copy2_delete_snaplist(priv);
2257 :
2258 : /* Set the current time as snaplist update time */
2259 60 : time(&(priv->snaps->fetch_time));
2260 : }
2261 :
2262 17460 : while ((d = SMB_VFS_NEXT_READDIR(handle, dirfsp, p))) {
2263 : char snapshot[GMT_NAME_LEN+1];
2264 : SHADOW_COPY_LABEL *tlabels;
2265 :
2266 : /*
2267 : * ignore names not of the right form in the snapshot
2268 : * directory
2269 : */
2270 14950 : if (!shadow_copy2_snapshot_to_gmt(
2271 14950 : handle, d->d_name,
2272 : snapshot, sizeof(snapshot))) {
2273 :
2274 7464 : DEBUG(6, ("shadow_copy2_get_shadow_copy_data: "
2275 : "ignoring %s\n", d->d_name));
2276 11268 : continue;
2277 : }
2278 7486 : DEBUG(6,("shadow_copy2_get_shadow_copy_data: %s -> %s\n",
2279 : d->d_name, snapshot));
2280 :
2281 7486 : if (get_snaplist) {
2282 : /*
2283 : * Create a snap entry for each successful
2284 : * pattern match.
2285 : */
2286 228 : tmpentry = shadow_copy2_create_snapentry(priv);
2287 228 : if (tmpentry == NULL) {
2288 0 : DBG_ERR("talloc_zero() failed\n");
2289 0 : goto done;
2290 : }
2291 228 : tmpentry->snapname = talloc_strdup(tmpentry, d->d_name);
2292 228 : tmpentry->time_fmt = talloc_strdup(tmpentry, snapshot);
2293 : }
2294 :
2295 7486 : if (shadow_copy2_data == NULL) {
2296 116 : continue;
2297 : }
2298 :
2299 7370 : if (!labels) {
2300 : /* the caller doesn't want the labels */
2301 3688 : shadow_copy2_data->num_volumes++;
2302 3688 : continue;
2303 : }
2304 :
2305 3682 : tlabels = talloc_realloc(shadow_copy2_data,
2306 : shadow_copy2_data->labels,
2307 : SHADOW_COPY_LABEL,
2308 : shadow_copy2_data->num_volumes+1);
2309 3682 : if (tlabels == NULL) {
2310 0 : DEBUG(0,("shadow_copy2: out of memory\n"));
2311 0 : goto done;
2312 : }
2313 :
2314 3682 : strlcpy(tlabels[shadow_copy2_data->num_volumes], snapshot,
2315 : sizeof(*tlabels));
2316 :
2317 3682 : shadow_copy2_data->num_volumes++;
2318 3682 : shadow_copy2_data->labels = tlabels;
2319 : }
2320 :
2321 2510 : shadow_copy2_sort_data(handle, shadow_copy2_data);
2322 2510 : ret = 0;
2323 :
2324 2510 : done:
2325 2510 : if (ret != 0) {
2326 0 : saved_errno = errno;
2327 : }
2328 2510 : TALLOC_FREE(fspcwd );
2329 2510 : if (p != NULL) {
2330 2510 : SMB_VFS_NEXT_CLOSEDIR(handle, p);
2331 2510 : p = NULL;
2332 2510 : if (dirfsp != NULL) {
2333 : /*
2334 : * VFS_CLOSEDIR implicitly
2335 : * closed the associated fd.
2336 : */
2337 2510 : fsp_set_fd(dirfsp, -1);
2338 : }
2339 : }
2340 2510 : if (dirfsp != NULL) {
2341 2510 : fd_close(dirfsp);
2342 2510 : file_free(NULL, dirfsp);
2343 : }
2344 2510 : TALLOC_FREE(tmp_ctx);
2345 2510 : if (saved_errno != 0) {
2346 0 : errno = saved_errno;
2347 : }
2348 2510 : return ret;
2349 : }
2350 :
2351 10 : static int shadow_copy2_mkdirat(vfs_handle_struct *handle,
2352 : struct files_struct *dirfsp,
2353 : const struct smb_filename *smb_fname,
2354 : mode_t mode)
2355 : {
2356 10 : struct smb_filename *full_fname = NULL;
2357 10 : time_t timestamp = 0;
2358 :
2359 10 : full_fname = full_path_from_dirfsp_atname(talloc_tos(),
2360 : dirfsp,
2361 : smb_fname);
2362 10 : if (full_fname == NULL) {
2363 0 : errno = ENOMEM;
2364 0 : return -1;
2365 : }
2366 :
2367 10 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
2368 : handle,
2369 : full_fname,
2370 : ×tamp,
2371 : NULL)) {
2372 0 : TALLOC_FREE(full_fname);
2373 0 : return -1;
2374 : }
2375 10 : TALLOC_FREE(full_fname);
2376 10 : if (timestamp != 0) {
2377 0 : errno = EROFS;
2378 0 : return -1;
2379 : }
2380 10 : return SMB_VFS_NEXT_MKDIRAT(handle,
2381 : dirfsp,
2382 : smb_fname,
2383 : mode);
2384 : }
2385 :
2386 0 : static int shadow_copy2_fchflags(vfs_handle_struct *handle,
2387 : struct files_struct *fsp,
2388 : unsigned int flags)
2389 : {
2390 0 : time_t timestamp = 0;
2391 :
2392 0 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
2393 : handle,
2394 : fsp->fsp_name,
2395 : ×tamp,
2396 : NULL)) {
2397 0 : return -1;
2398 : }
2399 0 : if (timestamp != 0) {
2400 0 : errno = EROFS;
2401 0 : return -1;
2402 : }
2403 0 : return SMB_VFS_NEXT_FCHFLAGS(handle, fsp, flags);
2404 : }
2405 :
2406 20 : static int shadow_copy2_fsetxattr(struct vfs_handle_struct *handle,
2407 : struct files_struct *fsp,
2408 : const char *aname, const void *value,
2409 : size_t size, int flags)
2410 : {
2411 20 : time_t timestamp = 0;
2412 20 : const struct smb_filename *smb_fname = NULL;
2413 :
2414 20 : smb_fname = fsp->fsp_name;
2415 20 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
2416 : handle,
2417 : smb_fname,
2418 : ×tamp,
2419 : NULL)) {
2420 0 : return -1;
2421 : }
2422 20 : if (timestamp != 0) {
2423 0 : errno = EROFS;
2424 0 : return -1;
2425 : }
2426 20 : return SMB_VFS_NEXT_FSETXATTR(handle, fsp,
2427 : aname, value, size, flags);
2428 : }
2429 :
2430 0 : static NTSTATUS shadow_copy2_create_dfs_pathat(struct vfs_handle_struct *handle,
2431 : struct files_struct *dirfsp,
2432 : const struct smb_filename *smb_fname,
2433 : const struct referral *reflist,
2434 : size_t referral_count)
2435 : {
2436 0 : time_t timestamp = 0;
2437 :
2438 0 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
2439 : handle,
2440 : smb_fname,
2441 : ×tamp,
2442 : NULL)) {
2443 0 : return NT_STATUS_NO_MEMORY;
2444 : }
2445 0 : if (timestamp != 0) {
2446 0 : return NT_STATUS_MEDIA_WRITE_PROTECTED;
2447 : }
2448 0 : return SMB_VFS_NEXT_CREATE_DFS_PATHAT(handle,
2449 : dirfsp,
2450 : smb_fname,
2451 : reflist,
2452 : referral_count);
2453 : }
2454 :
2455 0 : static NTSTATUS shadow_copy2_read_dfs_pathat(struct vfs_handle_struct *handle,
2456 : TALLOC_CTX *mem_ctx,
2457 : struct files_struct *dirfsp,
2458 : struct smb_filename *smb_fname,
2459 : struct referral **ppreflist,
2460 : size_t *preferral_count)
2461 : {
2462 0 : time_t timestamp = 0;
2463 0 : char *stripped = NULL;
2464 0 : struct smb_filename *full_fname = NULL;
2465 0 : struct smb_filename *conv = NULL;
2466 : NTSTATUS status;
2467 :
2468 0 : full_fname = full_path_from_dirfsp_atname(talloc_tos(),
2469 : dirfsp,
2470 : smb_fname);
2471 0 : if (full_fname == NULL) {
2472 0 : return NT_STATUS_NO_MEMORY;
2473 : }
2474 :
2475 0 : if (!shadow_copy2_strip_snapshot(mem_ctx,
2476 : handle,
2477 : full_fname,
2478 : ×tamp,
2479 : &stripped)) {
2480 0 : TALLOC_FREE(full_fname);
2481 0 : return NT_STATUS_NO_MEMORY;
2482 : }
2483 0 : if (timestamp == 0) {
2484 0 : TALLOC_FREE(full_fname);
2485 0 : TALLOC_FREE(stripped);
2486 0 : return SMB_VFS_NEXT_READ_DFS_PATHAT(handle,
2487 : mem_ctx,
2488 : dirfsp,
2489 : smb_fname,
2490 : ppreflist,
2491 : preferral_count);
2492 : }
2493 :
2494 0 : conv = cp_smb_filename(mem_ctx, full_fname);
2495 0 : if (conv == NULL) {
2496 0 : TALLOC_FREE(full_fname);
2497 0 : TALLOC_FREE(stripped);
2498 0 : return NT_STATUS_NO_MEMORY;
2499 : }
2500 0 : TALLOC_FREE(full_fname);
2501 0 : conv->base_name = shadow_copy2_convert(conv,
2502 : handle,
2503 : stripped,
2504 : timestamp);
2505 0 : TALLOC_FREE(stripped);
2506 0 : if (conv->base_name == NULL) {
2507 0 : TALLOC_FREE(conv);
2508 0 : return NT_STATUS_NO_MEMORY;
2509 : }
2510 :
2511 0 : status = SMB_VFS_NEXT_READ_DFS_PATHAT(handle,
2512 : mem_ctx,
2513 : handle->conn->cwd_fsp,
2514 : conv,
2515 : ppreflist,
2516 : preferral_count);
2517 :
2518 0 : if (NT_STATUS_IS_OK(status)) {
2519 : /* Return any stat(2) info. */
2520 0 : smb_fname->st = conv->st;
2521 : }
2522 :
2523 0 : TALLOC_FREE(conv);
2524 0 : return status;
2525 : }
2526 :
2527 136 : static NTSTATUS shadow_copy2_get_real_filename_at(
2528 : struct vfs_handle_struct *handle,
2529 : struct files_struct *dirfsp,
2530 : const char *name,
2531 : TALLOC_CTX *mem_ctx,
2532 : char **found_name)
2533 : {
2534 136 : struct shadow_copy2_private *priv = NULL;
2535 136 : time_t timestamp = 0;
2536 136 : char *stripped = NULL;
2537 : char *conv;
2538 136 : struct smb_filename *conv_fname = NULL;
2539 : NTSTATUS status;
2540 : bool ok;
2541 :
2542 136 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2543 : return NT_STATUS_INTERNAL_ERROR);
2544 :
2545 136 : DBG_DEBUG("Path=[%s] name=[%s]\n", fsp_str_dbg(dirfsp), name);
2546 :
2547 136 : ok = shadow_copy2_strip_snapshot(
2548 : talloc_tos(), handle, dirfsp->fsp_name, ×tamp, &stripped);
2549 136 : if (!ok) {
2550 0 : status = map_nt_error_from_unix(errno);
2551 0 : DEBUG(10, ("shadow_copy2_strip_snapshot failed\n"));
2552 0 : return status;
2553 : }
2554 136 : if (timestamp == 0) {
2555 128 : DEBUG(10, ("timestamp == 0\n"));
2556 128 : return SMB_VFS_NEXT_GET_REAL_FILENAME_AT(
2557 : handle, dirfsp, name, mem_ctx, found_name);
2558 : }
2559 :
2560 : /*
2561 : * Note that stripped may be an empty string "" if path was ".". As
2562 : * shadow_copy2_convert() combines "" with the shadow-copy tree connect
2563 : * root fullpath and get_real_filename_full_scan() has an explicit check
2564 : * for "" this works.
2565 : */
2566 8 : DBG_DEBUG("stripped [%s]\n", stripped);
2567 :
2568 8 : conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2569 8 : if (conv == NULL) {
2570 0 : status = map_nt_error_from_unix(errno);
2571 0 : DBG_DEBUG("shadow_copy2_convert [%s] failed: %s\n",
2572 : stripped,
2573 : strerror(errno));
2574 0 : return status;
2575 : }
2576 :
2577 8 : status = synthetic_pathref(
2578 : talloc_tos(),
2579 8 : dirfsp->conn->cwd_fsp,
2580 : conv,
2581 : NULL,
2582 : NULL,
2583 : 0,
2584 : 0,
2585 : &conv_fname);
2586 8 : if (!NT_STATUS_IS_OK(status)) {
2587 0 : return status;
2588 : }
2589 :
2590 8 : DEBUG(10, ("Calling NEXT_GET_REAL_FILE_NAME for conv=[%s], "
2591 : "name=[%s]\n", conv, name));
2592 8 : status = SMB_VFS_NEXT_GET_REAL_FILENAME_AT(
2593 : handle, conv_fname->fsp, name, mem_ctx, found_name);
2594 8 : DEBUG(10, ("NEXT_REAL_FILE_NAME returned %s\n", nt_errstr(status)));
2595 8 : if (NT_STATUS_IS_OK(status)) {
2596 0 : TALLOC_FREE(conv_fname);
2597 0 : return NT_STATUS_OK;
2598 : }
2599 8 : if (!NT_STATUS_EQUAL(status, NT_STATUS_NOT_SUPPORTED)) {
2600 0 : TALLOC_FREE(conv_fname);
2601 0 : TALLOC_FREE(conv);
2602 0 : return NT_STATUS_NOT_SUPPORTED;
2603 : }
2604 :
2605 8 : status = get_real_filename_full_scan_at(
2606 8 : conv_fname->fsp, name, false, mem_ctx, found_name);
2607 8 : TALLOC_FREE(conv_fname);
2608 8 : if (!NT_STATUS_IS_OK(status)) {
2609 0 : DBG_DEBUG("Scan [%s] for [%s] failed\n",
2610 : conv, name);
2611 0 : return status;
2612 : }
2613 :
2614 8 : DBG_DEBUG("Scan [%s] for [%s] returned [%s]\n",
2615 : conv, name, *found_name);
2616 :
2617 8 : TALLOC_FREE(conv);
2618 8 : return NT_STATUS_OK;
2619 : }
2620 :
2621 6170 : static const char *shadow_copy2_connectpath(
2622 : struct vfs_handle_struct *handle,
2623 : const struct files_struct *dirfsp,
2624 : const struct smb_filename *smb_fname_in)
2625 : {
2626 6170 : time_t timestamp = 0;
2627 6170 : char *stripped = NULL;
2628 6170 : char *tmp = NULL;
2629 6170 : const char *fname = smb_fname_in->base_name;
2630 6170 : const struct smb_filename *full = NULL;
2631 6170 : struct smb_filename smb_fname = {0};
2632 6170 : struct smb_filename *result_fname = NULL;
2633 6170 : char *result = NULL;
2634 6170 : char *parent_dir = NULL;
2635 6170 : int saved_errno = 0;
2636 6170 : size_t rootpath_len = 0;
2637 6170 : struct shadow_copy2_private *priv = NULL;
2638 :
2639 6170 : SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2640 : return NULL);
2641 :
2642 6170 : DBG_DEBUG("Calc connect path for [%s]\n", fname);
2643 :
2644 6170 : if (priv->shadow_connectpath != NULL) {
2645 2 : DBG_DEBUG("cached connect path is [%s]\n",
2646 : priv->shadow_connectpath);
2647 2 : return priv->shadow_connectpath;
2648 : }
2649 :
2650 6168 : full = full_path_from_dirfsp_atname(
2651 : talloc_tos(), dirfsp, smb_fname_in);
2652 6168 : if (full == NULL) {
2653 0 : return NULL;
2654 : }
2655 :
2656 6168 : if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, full,
2657 : ×tamp, &stripped)) {
2658 0 : goto done;
2659 : }
2660 6168 : if (timestamp == 0) {
2661 5794 : return SMB_VFS_NEXT_CONNECTPATH(handle, dirfsp, smb_fname_in);
2662 : }
2663 :
2664 374 : tmp = shadow_copy2_do_convert(talloc_tos(), handle, stripped, timestamp,
2665 : &rootpath_len);
2666 374 : if (tmp == NULL) {
2667 0 : if (errno != ENOENT) {
2668 0 : goto done;
2669 : }
2670 :
2671 : /*
2672 : * If the converted path does not exist, and converting
2673 : * the parent yields something that does exist, then
2674 : * this path refers to something that has not been
2675 : * created yet, relative to the parent path.
2676 : * The snapshot finding is relative to the parent.
2677 : * (usually snapshots are read/only but this is not
2678 : * necessarily true).
2679 : * This code also covers getting a wildcard in the
2680 : * last component, because this function is called
2681 : * prior to sanitizing the path, and in SMB1 we may
2682 : * get wildcards in path names.
2683 : */
2684 0 : if (!parent_dirname(talloc_tos(), stripped, &parent_dir,
2685 : NULL)) {
2686 0 : errno = ENOMEM;
2687 0 : goto done;
2688 : }
2689 :
2690 0 : tmp = shadow_copy2_do_convert(talloc_tos(), handle, parent_dir,
2691 : timestamp, &rootpath_len);
2692 0 : if (tmp == NULL) {
2693 0 : goto done;
2694 : }
2695 : }
2696 :
2697 374 : DBG_DEBUG("converted path is [%s] root path is [%.*s]\n", tmp,
2698 : (int)rootpath_len, tmp);
2699 :
2700 374 : tmp[rootpath_len] = '\0';
2701 374 : smb_fname = (struct smb_filename) { .base_name = tmp };
2702 :
2703 374 : result_fname = SMB_VFS_NEXT_REALPATH(handle, priv, &smb_fname);
2704 374 : if (result_fname == NULL) {
2705 0 : goto done;
2706 : }
2707 :
2708 : /*
2709 : * SMB_VFS_NEXT_REALPATH returns a talloc'ed string.
2710 : * Don't leak memory.
2711 : */
2712 374 : TALLOC_FREE(priv->shadow_realpath);
2713 374 : priv->shadow_realpath = result_fname;
2714 374 : result = priv->shadow_realpath->base_name;
2715 :
2716 374 : DBG_DEBUG("connect path is [%s]\n", result);
2717 :
2718 374 : done:
2719 374 : if (result == NULL) {
2720 0 : saved_errno = errno;
2721 : }
2722 374 : TALLOC_FREE(tmp);
2723 374 : TALLOC_FREE(stripped);
2724 374 : TALLOC_FREE(parent_dir);
2725 374 : if (saved_errno != 0) {
2726 0 : errno = saved_errno;
2727 : }
2728 374 : return result;
2729 : }
2730 :
2731 11148 : static NTSTATUS shadow_copy2_parent_pathname(vfs_handle_struct *handle,
2732 : TALLOC_CTX *ctx,
2733 : const struct smb_filename *smb_fname_in,
2734 : struct smb_filename **parent_dir_out,
2735 : struct smb_filename **atname_out)
2736 : {
2737 11148 : time_t timestamp = 0;
2738 11148 : char *stripped = NULL;
2739 11148 : char *converted_name = NULL;
2740 11148 : struct smb_filename *smb_fname = NULL;
2741 11148 : struct smb_filename *parent = NULL;
2742 11148 : struct smb_filename *atname = NULL;
2743 11148 : struct shadow_copy2_private *priv = NULL;
2744 11148 : bool ok = false;
2745 11148 : bool is_converted = false;
2746 11148 : NTSTATUS status = NT_STATUS_OK;
2747 11148 : TALLOC_CTX *frame = NULL;
2748 :
2749 11148 : SMB_VFS_HANDLE_GET_DATA(handle,
2750 : priv,
2751 : struct shadow_copy2_private,
2752 : return NT_STATUS_INTERNAL_ERROR);
2753 :
2754 11148 : frame = talloc_stackframe();
2755 :
2756 11148 : smb_fname = cp_smb_filename(frame, smb_fname_in);
2757 11148 : if (smb_fname == NULL) {
2758 0 : status = NT_STATUS_NO_MEMORY;
2759 0 : goto fail;
2760 : }
2761 :
2762 : /* First, call the default PARENT_PATHNAME. */
2763 11148 : status = SMB_VFS_NEXT_PARENT_PATHNAME(handle,
2764 : frame,
2765 : smb_fname,
2766 : &parent,
2767 : &atname);
2768 11148 : if (!NT_STATUS_IS_OK(status)) {
2769 0 : goto fail;
2770 : }
2771 :
2772 11148 : if (parent->twrp == 0) {
2773 : /*
2774 : * Parent is not a snapshot path, return
2775 : * the regular result.
2776 : */
2777 8994 : status = NT_STATUS_OK;
2778 8994 : goto out;
2779 : }
2780 :
2781 : /* See if we can find a snapshot for the parent. */
2782 2154 : ok = shadow_copy2_strip_snapshot_converted(frame,
2783 : handle,
2784 : parent,
2785 : ×tamp,
2786 : &stripped,
2787 : &is_converted);
2788 2154 : if (!ok) {
2789 0 : status = map_nt_error_from_unix(errno);
2790 0 : goto fail;
2791 : }
2792 :
2793 2154 : if (is_converted) {
2794 : /*
2795 : * Already found snapshot for parent so wipe
2796 : * out the twrp.
2797 : */
2798 0 : parent->twrp = 0;
2799 0 : goto out;
2800 : }
2801 :
2802 2154 : converted_name = shadow_copy2_convert(frame,
2803 : handle,
2804 : stripped,
2805 : timestamp);
2806 :
2807 2154 : if (converted_name == NULL) {
2808 : /*
2809 : * Can't find snapshot for parent so wipe
2810 : * out the twrp.
2811 : */
2812 68 : parent->twrp = 0;
2813 : }
2814 :
2815 2086 : out:
2816 :
2817 11148 : *parent_dir_out = talloc_move(ctx, &parent);
2818 11148 : if (atname_out != NULL) {
2819 11146 : *atname_out = talloc_move(*parent_dir_out, &atname);
2820 : }
2821 :
2822 2 : fail:
2823 :
2824 11148 : TALLOC_FREE(frame);
2825 11148 : return status;
2826 : }
2827 :
2828 138 : static uint64_t shadow_copy2_disk_free(vfs_handle_struct *handle,
2829 : const struct smb_filename *smb_fname,
2830 : uint64_t *bsize,
2831 : uint64_t *dfree,
2832 : uint64_t *dsize)
2833 : {
2834 138 : time_t timestamp = 0;
2835 138 : char *stripped = NULL;
2836 138 : int saved_errno = 0;
2837 138 : char *conv = NULL;
2838 138 : struct smb_filename *conv_smb_fname = NULL;
2839 138 : uint64_t ret = (uint64_t)-1;
2840 :
2841 138 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
2842 : handle,
2843 : smb_fname,
2844 : ×tamp,
2845 : &stripped)) {
2846 0 : return (uint64_t)-1;
2847 : }
2848 138 : if (timestamp == 0) {
2849 138 : return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname,
2850 : bsize, dfree, dsize);
2851 : }
2852 0 : conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2853 0 : TALLOC_FREE(stripped);
2854 0 : if (conv == NULL) {
2855 0 : return (uint64_t)-1;
2856 : }
2857 0 : conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2858 : conv,
2859 : NULL,
2860 : NULL,
2861 : 0,
2862 0 : smb_fname->flags);
2863 0 : if (conv_smb_fname == NULL) {
2864 0 : TALLOC_FREE(conv);
2865 0 : return (uint64_t)-1;
2866 : }
2867 0 : ret = SMB_VFS_NEXT_DISK_FREE(handle, conv_smb_fname,
2868 : bsize, dfree, dsize);
2869 0 : if (ret == (uint64_t)-1) {
2870 0 : saved_errno = errno;
2871 : }
2872 0 : TALLOC_FREE(conv);
2873 0 : TALLOC_FREE(conv_smb_fname);
2874 0 : if (saved_errno != 0) {
2875 0 : errno = saved_errno;
2876 : }
2877 0 : return ret;
2878 : }
2879 :
2880 276 : static int shadow_copy2_get_quota(vfs_handle_struct *handle,
2881 : const struct smb_filename *smb_fname,
2882 : enum SMB_QUOTA_TYPE qtype,
2883 : unid_t id,
2884 : SMB_DISK_QUOTA *dq)
2885 : {
2886 276 : time_t timestamp = 0;
2887 276 : char *stripped = NULL;
2888 : int ret;
2889 276 : int saved_errno = 0;
2890 : char *conv;
2891 276 : struct smb_filename *conv_smb_fname = NULL;
2892 :
2893 276 : if (!shadow_copy2_strip_snapshot(talloc_tos(),
2894 : handle,
2895 : smb_fname,
2896 : ×tamp,
2897 : &stripped)) {
2898 0 : return -1;
2899 : }
2900 276 : if (timestamp == 0) {
2901 276 : return SMB_VFS_NEXT_GET_QUOTA(handle, smb_fname, qtype, id, dq);
2902 : }
2903 :
2904 0 : conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2905 0 : TALLOC_FREE(stripped);
2906 0 : if (conv == NULL) {
2907 0 : return -1;
2908 : }
2909 0 : conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2910 : conv,
2911 : NULL,
2912 : NULL,
2913 : 0,
2914 0 : smb_fname->flags);
2915 0 : if (conv_smb_fname == NULL) {
2916 0 : TALLOC_FREE(conv);
2917 0 : return -1;
2918 : }
2919 0 : ret = SMB_VFS_NEXT_GET_QUOTA(handle, conv_smb_fname, qtype, id, dq);
2920 :
2921 0 : if (ret == -1) {
2922 0 : saved_errno = errno;
2923 : }
2924 0 : TALLOC_FREE(conv);
2925 0 : TALLOC_FREE(conv_smb_fname);
2926 0 : if (saved_errno != 0) {
2927 0 : errno = saved_errno;
2928 : }
2929 :
2930 0 : return ret;
2931 : }
2932 :
2933 0 : static ssize_t shadow_copy2_pwrite(vfs_handle_struct *handle,
2934 : files_struct *fsp,
2935 : const void *data,
2936 : size_t n,
2937 : off_t offset)
2938 : {
2939 : ssize_t nwritten;
2940 :
2941 0 : nwritten = SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
2942 0 : if (nwritten == -1) {
2943 0 : if (errno == EBADF && fsp->fsp_flags.can_write) {
2944 0 : errno = EROFS;
2945 : }
2946 : }
2947 :
2948 0 : return nwritten;
2949 : }
2950 :
2951 : struct shadow_copy2_pwrite_state {
2952 : vfs_handle_struct *handle;
2953 : files_struct *fsp;
2954 : ssize_t ret;
2955 : struct vfs_aio_state vfs_aio_state;
2956 : };
2957 :
2958 : static void shadow_copy2_pwrite_done(struct tevent_req *subreq);
2959 :
2960 6 : static struct tevent_req *shadow_copy2_pwrite_send(
2961 : struct vfs_handle_struct *handle, TALLOC_CTX *mem_ctx,
2962 : struct tevent_context *ev, struct files_struct *fsp,
2963 : const void *data, size_t n, off_t offset)
2964 : {
2965 6 : struct tevent_req *req = NULL, *subreq = NULL;
2966 6 : struct shadow_copy2_pwrite_state *state = NULL;
2967 :
2968 6 : req = tevent_req_create(mem_ctx, &state,
2969 : struct shadow_copy2_pwrite_state);
2970 6 : if (req == NULL) {
2971 0 : return NULL;
2972 : }
2973 6 : state->handle = handle;
2974 6 : state->fsp = fsp;
2975 :
2976 6 : subreq = SMB_VFS_NEXT_PWRITE_SEND(state,
2977 : ev,
2978 : handle,
2979 : fsp,
2980 : data,
2981 : n,
2982 : offset);
2983 6 : if (tevent_req_nomem(subreq, req)) {
2984 0 : return tevent_req_post(req, ev);
2985 : }
2986 6 : tevent_req_set_callback(subreq, shadow_copy2_pwrite_done, req);
2987 :
2988 6 : return req;
2989 : }
2990 :
2991 6 : static void shadow_copy2_pwrite_done(struct tevent_req *subreq)
2992 : {
2993 6 : struct tevent_req *req = tevent_req_callback_data(
2994 : subreq, struct tevent_req);
2995 6 : struct shadow_copy2_pwrite_state *state = tevent_req_data(
2996 : req, struct shadow_copy2_pwrite_state);
2997 :
2998 6 : state->ret = SMB_VFS_PWRITE_RECV(subreq, &state->vfs_aio_state);
2999 6 : TALLOC_FREE(subreq);
3000 6 : if (state->ret == -1) {
3001 0 : tevent_req_error(req, state->vfs_aio_state.error);
3002 0 : return;
3003 : }
3004 :
3005 6 : tevent_req_done(req);
3006 : }
3007 :
3008 6 : static ssize_t shadow_copy2_pwrite_recv(struct tevent_req *req,
3009 : struct vfs_aio_state *vfs_aio_state)
3010 : {
3011 6 : struct shadow_copy2_pwrite_state *state = tevent_req_data(
3012 : req, struct shadow_copy2_pwrite_state);
3013 :
3014 6 : if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
3015 0 : if ((vfs_aio_state->error == EBADF) &&
3016 0 : state->fsp->fsp_flags.can_write)
3017 : {
3018 0 : vfs_aio_state->error = EROFS;
3019 0 : errno = EROFS;
3020 : }
3021 0 : return -1;
3022 : }
3023 :
3024 6 : *vfs_aio_state = state->vfs_aio_state;
3025 6 : return state->ret;
3026 : }
3027 :
3028 2424 : static int shadow_copy2_connect(struct vfs_handle_struct *handle,
3029 : const char *service, const char *user)
3030 : {
3031 : struct shadow_copy2_config *config;
3032 : struct shadow_copy2_private *priv;
3033 : int ret;
3034 : const char *snapdir;
3035 2424 : const char *snapprefix = NULL;
3036 : const char *delimiter;
3037 : const char *gmt_format;
3038 : const char *sort_order;
3039 2424 : const char *basedir = NULL;
3040 2424 : const char *snapsharepath = NULL;
3041 : const char *mount_point;
3042 :
3043 2424 : DBG_DEBUG("cnum[%" PRIu32 "], connectpath[%s]\n",
3044 : handle->conn->cnum,
3045 : handle->conn->connectpath);
3046 :
3047 2424 : ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
3048 2424 : if (ret < 0) {
3049 0 : return ret;
3050 : }
3051 :
3052 2424 : priv = talloc_zero(handle->conn, struct shadow_copy2_private);
3053 2424 : if (priv == NULL) {
3054 0 : DBG_ERR("talloc_zero() failed\n");
3055 0 : errno = ENOMEM;
3056 0 : return -1;
3057 : }
3058 :
3059 2424 : priv->snaps = talloc_zero(priv, struct shadow_copy2_snaplist_info);
3060 2424 : if (priv->snaps == NULL) {
3061 0 : DBG_ERR("talloc_zero() failed\n");
3062 0 : errno = ENOMEM;
3063 0 : return -1;
3064 : }
3065 :
3066 2424 : config = talloc_zero(priv, struct shadow_copy2_config);
3067 2424 : if (config == NULL) {
3068 0 : DEBUG(0, ("talloc_zero() failed\n"));
3069 0 : errno = ENOMEM;
3070 0 : return -1;
3071 : }
3072 :
3073 2424 : priv->config = config;
3074 :
3075 2424 : gmt_format = lp_parm_const_string(SNUM(handle->conn),
3076 : "shadow", "format",
3077 : GMT_FORMAT);
3078 2424 : config->gmt_format = talloc_strdup(config, gmt_format);
3079 2424 : if (config->gmt_format == NULL) {
3080 0 : DEBUG(0, ("talloc_strdup() failed\n"));
3081 0 : errno = ENOMEM;
3082 0 : return -1;
3083 : }
3084 :
3085 : /* config->gmt_format must not contain a path separator. */
3086 2424 : if (strchr(config->gmt_format, '/') != NULL) {
3087 0 : DEBUG(0, ("shadow:format %s must not contain a /"
3088 : "character. Unable to initialize module.\n",
3089 : config->gmt_format));
3090 0 : errno = EINVAL;
3091 0 : return -1;
3092 : }
3093 :
3094 2424 : config->use_sscanf = lp_parm_bool(SNUM(handle->conn),
3095 : "shadow", "sscanf", false);
3096 :
3097 2424 : config->use_localtime = lp_parm_bool(SNUM(handle->conn),
3098 : "shadow", "localtime",
3099 : false);
3100 :
3101 2424 : snapdir = lp_parm_const_string(SNUM(handle->conn),
3102 : "shadow", "snapdir",
3103 : ".snapshots");
3104 2424 : config->snapdir = talloc_strdup(config, snapdir);
3105 2424 : if (config->snapdir == NULL) {
3106 0 : DEBUG(0, ("talloc_strdup() failed\n"));
3107 0 : errno = ENOMEM;
3108 0 : return -1;
3109 : }
3110 :
3111 2424 : snapprefix = lp_parm_const_string(SNUM(handle->conn),
3112 : "shadow", "snapprefix",
3113 : NULL);
3114 2424 : if (snapprefix != NULL) {
3115 72 : priv->snaps->regex = talloc_zero(priv->snaps, regex_t);
3116 72 : if (priv->snaps->regex == NULL) {
3117 0 : DBG_ERR("talloc_zero() failed\n");
3118 0 : errno = ENOMEM;
3119 0 : return -1;
3120 : }
3121 :
3122 : /* pre-compute regex rule for matching pattern later */
3123 72 : ret = regcomp(priv->snaps->regex, snapprefix, 0);
3124 72 : if (ret) {
3125 0 : DBG_ERR("Failed to create regex object\n");
3126 0 : return -1;
3127 : }
3128 : }
3129 :
3130 2424 : delimiter = lp_parm_const_string(SNUM(handle->conn),
3131 : "shadow", "delimiter",
3132 : "_GMT");
3133 2424 : if (delimiter != NULL) {
3134 2424 : priv->config->delimiter = talloc_strdup(priv->config, delimiter);
3135 2424 : if (priv->config->delimiter == NULL) {
3136 0 : DBG_ERR("talloc_strdup() failed\n");
3137 0 : errno = ENOMEM;
3138 0 : return -1;
3139 : }
3140 : }
3141 :
3142 2424 : config->snapdirseverywhere = lp_parm_bool(SNUM(handle->conn),
3143 : "shadow",
3144 : "snapdirseverywhere",
3145 : false);
3146 :
3147 2424 : config->crossmountpoints = lp_parm_bool(SNUM(handle->conn),
3148 : "shadow", "crossmountpoints",
3149 : false);
3150 :
3151 2424 : if (config->crossmountpoints && !config->snapdirseverywhere) {
3152 0 : DBG_WARNING("Warning: 'crossmountpoints' depends on "
3153 : "'snapdirseverywhere'. Disabling crossmountpoints.\n");
3154 : }
3155 :
3156 2424 : config->fixinodes = lp_parm_bool(SNUM(handle->conn),
3157 : "shadow", "fixinodes",
3158 : false);
3159 :
3160 2424 : sort_order = lp_parm_const_string(SNUM(handle->conn),
3161 : "shadow", "sort", "desc");
3162 2424 : config->sort_order = talloc_strdup(config, sort_order);
3163 2424 : if (config->sort_order == NULL) {
3164 0 : DEBUG(0, ("talloc_strdup() failed\n"));
3165 0 : errno = ENOMEM;
3166 0 : return -1;
3167 : }
3168 :
3169 2424 : mount_point = lp_parm_const_string(SNUM(handle->conn),
3170 : "shadow", "mountpoint", NULL);
3171 2424 : if (mount_point != NULL) {
3172 2306 : if (mount_point[0] != '/') {
3173 0 : DBG_WARNING("Warning: 'mountpoint' is relative "
3174 : "('%s'), but it has to be an absolute "
3175 : "path. Ignoring provided value.\n",
3176 : mount_point);
3177 0 : mount_point = NULL;
3178 : } else {
3179 : char *p;
3180 2306 : p = strstr(handle->conn->connectpath, mount_point);
3181 2306 : if (p != handle->conn->connectpath) {
3182 0 : DBG_WARNING("Warning: the share root (%s) is "
3183 : "not a subdirectory of the "
3184 : "specified mountpoint (%s). "
3185 : "Ignoring provided value.\n",
3186 : handle->conn->connectpath,
3187 : mount_point);
3188 0 : mount_point = NULL;
3189 : }
3190 : }
3191 : }
3192 :
3193 2424 : if (mount_point != NULL) {
3194 2306 : config->mount_point = talloc_strdup(config, mount_point);
3195 2306 : if (config->mount_point == NULL) {
3196 0 : DBG_ERR("talloc_strdup() failed\n");
3197 0 : return -1;
3198 : }
3199 : } else {
3200 118 : config->mount_point = shadow_copy2_find_mount_point(config,
3201 : handle);
3202 118 : if (config->mount_point == NULL) {
3203 0 : DBG_WARNING("shadow_copy2_find_mount_point "
3204 : "of the share root '%s' failed: %s\n",
3205 : handle->conn->connectpath, strerror(errno));
3206 0 : return -1;
3207 : }
3208 : }
3209 :
3210 2424 : basedir = lp_parm_const_string(SNUM(handle->conn),
3211 : "shadow", "basedir", NULL);
3212 :
3213 2424 : if (basedir != NULL) {
3214 532 : if (basedir[0] != '/') {
3215 0 : DBG_WARNING("Warning: 'basedir' is "
3216 : "relative ('%s'), but it has to be an "
3217 : "absolute path. Disabling basedir.\n",
3218 : basedir);
3219 0 : basedir = NULL;
3220 : } else {
3221 : char *p;
3222 532 : p = strstr(basedir, config->mount_point);
3223 532 : if (p != basedir) {
3224 0 : DEBUG(1, ("Warning: basedir (%s) is not a "
3225 : "subdirectory of the share root's "
3226 : "mount point (%s). "
3227 : "Disabling basedir\n",
3228 : basedir, config->mount_point));
3229 0 : basedir = NULL;
3230 : }
3231 : }
3232 : }
3233 :
3234 2424 : if (config->snapdirseverywhere && basedir != NULL) {
3235 0 : DBG_WARNING("Warning: 'basedir' is incompatible "
3236 : "with 'snapdirseverywhere'. Disabling basedir.\n");
3237 0 : basedir = NULL;
3238 : }
3239 :
3240 2424 : snapsharepath = lp_parm_const_string(SNUM(handle->conn), "shadow",
3241 : "snapsharepath", NULL);
3242 2424 : if (snapsharepath != NULL) {
3243 174 : if (snapsharepath[0] == '/') {
3244 0 : DBG_WARNING("Warning: 'snapsharepath' is "
3245 : "absolute ('%s'), but it has to be a "
3246 : "relative path. Disabling snapsharepath.\n",
3247 : snapsharepath);
3248 0 : snapsharepath = NULL;
3249 : }
3250 174 : if (config->snapdirseverywhere && snapsharepath != NULL) {
3251 0 : DBG_WARNING("Warning: 'snapsharepath' is incompatible "
3252 : "with 'snapdirseverywhere'. Disabling "
3253 : "snapsharepath.\n");
3254 0 : snapsharepath = NULL;
3255 : }
3256 : }
3257 :
3258 2424 : if (basedir != NULL && snapsharepath != NULL) {
3259 0 : DBG_WARNING("Warning: 'snapsharepath' is incompatible with "
3260 : "'basedir'. Disabling snapsharepath\n");
3261 0 : snapsharepath = NULL;
3262 : }
3263 :
3264 2424 : if (snapsharepath != NULL) {
3265 174 : config->rel_connectpath = talloc_strdup(config, snapsharepath);
3266 174 : if (config->rel_connectpath == NULL) {
3267 0 : DBG_ERR("talloc_strdup() failed\n");
3268 0 : errno = ENOMEM;
3269 0 : return -1;
3270 : }
3271 : }
3272 :
3273 2424 : if (basedir == NULL) {
3274 1892 : basedir = config->mount_point;
3275 : }
3276 :
3277 2424 : if (config->rel_connectpath == NULL &&
3278 2250 : strlen(basedir) < strlen(handle->conn->connectpath)) {
3279 3756 : config->rel_connectpath = talloc_strdup(config,
3280 1878 : handle->conn->connectpath + strlen(basedir));
3281 1878 : if (config->rel_connectpath == NULL) {
3282 0 : DEBUG(0, ("talloc_strdup() failed\n"));
3283 0 : errno = ENOMEM;
3284 0 : return -1;
3285 : }
3286 : }
3287 :
3288 2424 : if (config->snapdir[0] == '/') {
3289 1160 : config->snapdir_absolute = true;
3290 :
3291 1160 : if (config->snapdirseverywhere) {
3292 0 : DBG_WARNING("Warning: An absolute snapdir is "
3293 : "incompatible with 'snapdirseverywhere', "
3294 : "setting 'snapdirseverywhere' to "
3295 : "false.\n");
3296 0 : config->snapdirseverywhere = false;
3297 : }
3298 :
3299 1160 : if (config->crossmountpoints) {
3300 0 : DBG_WARNING("Warning: 'crossmountpoints' is not "
3301 : "supported with an absolute snapdir. "
3302 : "Disabling it.\n");
3303 0 : config->crossmountpoints = false;
3304 : }
3305 :
3306 1160 : config->snapshot_basepath = config->snapdir;
3307 : } else {
3308 1264 : config->snapshot_basepath = talloc_asprintf(config, "%s/%s",
3309 : config->mount_point, config->snapdir);
3310 1264 : if (config->snapshot_basepath == NULL) {
3311 0 : DEBUG(0, ("talloc_asprintf() failed\n"));
3312 0 : errno = ENOMEM;
3313 0 : return -1;
3314 : }
3315 : }
3316 :
3317 2424 : trim_string(config->mount_point, NULL, "/");
3318 2424 : trim_string(config->rel_connectpath, "/", "/");
3319 2424 : trim_string(config->snapdir, NULL, "/");
3320 2424 : trim_string(config->snapshot_basepath, NULL, "/");
3321 :
3322 2424 : DEBUG(10, ("shadow_copy2_connect: configuration:\n"
3323 : " share root: '%s'\n"
3324 : " mountpoint: '%s'\n"
3325 : " rel share root: '%s'\n"
3326 : " snapdir: '%s'\n"
3327 : " snapprefix: '%s'\n"
3328 : " delimiter: '%s'\n"
3329 : " snapshot base path: '%s'\n"
3330 : " format: '%s'\n"
3331 : " use sscanf: %s\n"
3332 : " snapdirs everywhere: %s\n"
3333 : " cross mountpoints: %s\n"
3334 : " fix inodes: %s\n"
3335 : " sort order: %s\n"
3336 : "",
3337 : handle->conn->connectpath,
3338 : config->mount_point,
3339 : config->rel_connectpath,
3340 : config->snapdir,
3341 : snapprefix,
3342 : config->delimiter,
3343 : config->snapshot_basepath,
3344 : config->gmt_format,
3345 : config->use_sscanf ? "yes" : "no",
3346 : config->snapdirseverywhere ? "yes" : "no",
3347 : config->crossmountpoints ? "yes" : "no",
3348 : config->fixinodes ? "yes" : "no",
3349 : config->sort_order
3350 : ));
3351 :
3352 :
3353 2424 : SMB_VFS_HANDLE_SET_DATA(handle, priv,
3354 : NULL, struct shadow_copy2_private,
3355 : return -1);
3356 :
3357 2424 : return 0;
3358 : }
3359 :
3360 : static struct vfs_fn_pointers vfs_shadow_copy2_fns = {
3361 : .connect_fn = shadow_copy2_connect,
3362 : .disk_free_fn = shadow_copy2_disk_free,
3363 : .get_quota_fn = shadow_copy2_get_quota,
3364 : .create_dfs_pathat_fn = shadow_copy2_create_dfs_pathat,
3365 : .read_dfs_pathat_fn = shadow_copy2_read_dfs_pathat,
3366 : .renameat_fn = shadow_copy2_renameat,
3367 : .linkat_fn = shadow_copy2_linkat,
3368 : .symlinkat_fn = shadow_copy2_symlinkat,
3369 : .stat_fn = shadow_copy2_stat,
3370 : .lstat_fn = shadow_copy2_lstat,
3371 : .fstat_fn = shadow_copy2_fstat,
3372 : .fstatat_fn = shadow_copy2_fstatat,
3373 : .openat_fn = shadow_copy2_openat,
3374 : .unlinkat_fn = shadow_copy2_unlinkat,
3375 : .fchmod_fn = shadow_copy2_fchmod,
3376 : .chdir_fn = shadow_copy2_chdir,
3377 : .fntimes_fn = shadow_copy2_fntimes,
3378 : .readlinkat_fn = shadow_copy2_readlinkat,
3379 : .mknodat_fn = shadow_copy2_mknodat,
3380 : .realpath_fn = shadow_copy2_realpath,
3381 : .get_shadow_copy_data_fn = shadow_copy2_get_shadow_copy_data,
3382 : .mkdirat_fn = shadow_copy2_mkdirat,
3383 : .fsetxattr_fn = shadow_copy2_fsetxattr,
3384 : .fchflags_fn = shadow_copy2_fchflags,
3385 : .get_real_filename_at_fn = shadow_copy2_get_real_filename_at,
3386 : .pwrite_fn = shadow_copy2_pwrite,
3387 : .pwrite_send_fn = shadow_copy2_pwrite_send,
3388 : .pwrite_recv_fn = shadow_copy2_pwrite_recv,
3389 : .connectpath_fn = shadow_copy2_connectpath,
3390 : .parent_pathname_fn = shadow_copy2_parent_pathname,
3391 : };
3392 :
3393 : static_decl_vfs;
3394 2255 : NTSTATUS vfs_shadow_copy2_init(TALLOC_CTX *ctx)
3395 : {
3396 2255 : return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
3397 : "shadow_copy2", &vfs_shadow_copy2_fns);
3398 : }
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