2 * shadow_copy2: a shadow copy module (second implementation)
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
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.
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.
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.
27 * This is a second implemetation of a shadow copy module for exposing
28 * file system snapshots to windows clients as shadow copies.
30 * See the manual page for documentation.
34 #include "smbd/smbd.h"
35 #include "system/filesys.h"
36 #include "include/ntioctl.h"
38 #include "lib/util_path.h"
39 #include "libcli/security/security.h"
40 #include "lib/util/tevent_unix.h"
42 struct shadow_copy2_config {
48 bool snapdirseverywhere;
49 bool crossmountpoints;
52 bool snapdir_absolute;
54 char *rel_connectpath; /* share root, relative to a snapshot root */
55 char *snapshot_basepath; /* the absolute version of snapdir */
58 /* Data-structure to hold the list of snap entries */
59 struct shadow_copy2_snapentry {
62 struct shadow_copy2_snapentry *next;
63 struct shadow_copy2_snapentry *prev;
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 */
74 * shadow_copy2 private structure. This structure will be
75 * used to keep module specific information
77 struct shadow_copy2_private {
78 struct shadow_copy2_config *config;
79 struct shadow_copy2_snaplist_info *snaps;
80 char *shadow_cwd; /* Absolute $cwd path. */
81 /* Absolute connectpath - can vary depending on $cwd. */
82 char *shadow_connectpath;
83 /* talloc'ed realpath return. */
84 struct smb_filename *shadow_realpath;
87 static int shadow_copy2_get_shadow_copy_data(
88 vfs_handle_struct *handle, files_struct *fsp,
89 struct shadow_copy_data *shadow_copy2_data,
93 *This function will create a new snapshot list entry and
94 * return to the caller. This entry will also be added to
95 * the global snapshot list.
97 * @param[in] priv shadow_copy2 specific data structure
98 * @return Newly created snapshot entry or NULL on failure
100 static struct shadow_copy2_snapentry *shadow_copy2_create_snapentry(
101 struct shadow_copy2_private *priv)
103 struct shadow_copy2_snapentry *tmpentry = NULL;
105 tmpentry = talloc_zero(priv->snaps, struct shadow_copy2_snapentry);
106 if (tmpentry == NULL) {
107 DBG_ERR("talloc_zero() failed\n");
112 DLIST_ADD(priv->snaps->snaplist, tmpentry);
118 *This function will delete the entire snaplist and reset
119 * priv->snaps->snaplist to NULL.
121 * @param[in] priv shadow_copye specific data structure
123 static void shadow_copy2_delete_snaplist(struct shadow_copy2_private *priv)
125 struct shadow_copy2_snapentry *tmp = NULL;
127 while ((tmp = priv->snaps->snaplist) != NULL) {
128 DLIST_REMOVE(priv->snaps->snaplist, tmp);
134 * Given a timestamp this function searches the global snapshot list
135 * and returns the complete snapshot directory name saved in the entry.
137 * @param[in] priv shadow_copy2 specific structure
138 * @param[in] timestamp timestamp corresponding to one of the snapshot
139 * @param[out] snap_str buffer to copy the actual snapshot name
140 * @param[in] len length of snap_str buffer
142 * @return Length of actual snapshot name, and -1 on failure
144 static ssize_t shadow_copy2_saved_snapname(struct shadow_copy2_private *priv,
145 struct tm *timestamp,
146 char *snap_str, size_t len)
148 ssize_t snaptime_len = -1;
149 struct shadow_copy2_snapentry *entry = NULL;
151 snaptime_len = strftime(snap_str, len, GMT_FORMAT, timestamp);
152 if (snaptime_len == 0) {
153 DBG_ERR("strftime failed\n");
159 for (entry = priv->snaps->snaplist; entry; entry = entry->next) {
160 if (strcmp(entry->time_fmt, snap_str) == 0) {
161 snaptime_len = snprintf(snap_str, len, "%s",
173 * This function will check if snaplist is updated or not. If snaplist
174 * is empty then it will create a new list. Each time snaplist is updated
175 * the time is recorded. If the snapshot time is greater than the snaplist
176 * update time then chances are we are working on an older list. Then discard
177 * the old list and fetch a new snaplist.
179 * @param[in] handle VFS handle struct
180 * @param[in] snap_time time of snapshot
182 * @return true if the list is updated else false
184 static bool shadow_copy2_update_snaplist(struct vfs_handle_struct *handle,
188 bool snaplist_updated = false;
189 struct files_struct fsp = {0};
190 struct smb_filename smb_fname = {0};
191 double seconds = 0.0;
192 struct shadow_copy2_private *priv = NULL;
194 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
197 seconds = difftime(snap_time, priv->snaps->fetch_time);
200 * Fetch the snapshot list if either the snaplist is empty or the
201 * required snapshot time is greater than the last fetched snaplist
204 if (seconds > 0 || (priv->snaps->snaplist == NULL)) {
205 smb_fname.base_name = discard_const_p(char, ".");
206 fsp.fsp_name = &smb_fname;
208 ret = shadow_copy2_get_shadow_copy_data(handle, &fsp,
211 snaplist_updated = true;
213 DBG_ERR("Failed to get shadow copy data\n");
218 return snaplist_updated;
221 static bool shadow_copy2_find_slashes(TALLOC_CTX *mem_ctx, const char *str,
223 unsigned *pnum_offsets)
225 unsigned num_offsets;
232 while ((p = strchr(p, '/')) != NULL) {
237 offsets = talloc_array(mem_ctx, size_t, num_offsets);
238 if (offsets == NULL) {
244 while ((p = strchr(p, '/')) != NULL) {
245 offsets[num_offsets] = p-str;
251 *pnum_offsets = num_offsets;
256 * Given a timestamp, build the posix level GMT-tag string
257 * based on the configurable format.
259 static ssize_t shadow_copy2_posix_gmt_string(struct vfs_handle_struct *handle,
261 char *snaptime_string,
265 ssize_t snaptime_len;
266 struct shadow_copy2_config *config;
267 struct shadow_copy2_private *priv;
269 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
272 config = priv->config;
274 if (config->use_sscanf) {
275 snaptime_len = snprintf(snaptime_string,
278 (unsigned long)snapshot);
279 if (snaptime_len <= 0) {
280 DEBUG(10, ("snprintf failed\n"));
284 if (config->use_localtime) {
285 if (localtime_r(&snapshot, &snap_tm) == 0) {
286 DEBUG(10, ("gmtime_r failed\n"));
290 if (gmtime_r(&snapshot, &snap_tm) == 0) {
291 DEBUG(10, ("gmtime_r failed\n"));
296 if (priv->snaps->regex != NULL) {
297 snaptime_len = shadow_copy2_saved_snapname(priv,
298 &snap_tm, snaptime_string, len);
299 if (snaptime_len >= 0)
303 * If we fail to find the snapshot name, chances are
304 * that we have not updated our snaplist. Make sure the
305 * snaplist is updated.
307 if (!shadow_copy2_update_snaplist(handle, snapshot)) {
308 DBG_DEBUG("shadow_copy2_update_snaplist "
313 return shadow_copy2_saved_snapname(priv,
314 &snap_tm, snaptime_string, len);
317 snaptime_len = strftime(snaptime_string,
321 if (snaptime_len == 0) {
322 DEBUG(10, ("strftime failed\n"));
331 * Given a timestamp, build the string to insert into a path
332 * as a path component for creating the local path to the
333 * snapshot at the given timestamp of the input path.
335 * In the case of a parallel snapdir (specified with an
336 * absolute path), this is the initial portion of the
337 * local path of any snapshot file. The complete path is
338 * obtained by appending the portion of the file's path
339 * below the share root's mountpoint.
341 static char *shadow_copy2_insert_string(TALLOC_CTX *mem_ctx,
342 struct vfs_handle_struct *handle,
345 fstring snaptime_string;
346 ssize_t snaptime_len = 0;
348 struct shadow_copy2_config *config;
349 struct shadow_copy2_private *priv;
351 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
354 config = priv->config;
356 snaptime_len = shadow_copy2_posix_gmt_string(handle,
359 sizeof(snaptime_string));
360 if (snaptime_len <= 0) {
364 if (config->snapdir_absolute) {
365 result = talloc_asprintf(mem_ctx, "%s/%s",
366 config->snapdir, snaptime_string);
368 result = talloc_asprintf(mem_ctx, "/%s/%s",
369 config->snapdir, snaptime_string);
371 if (result == NULL) {
372 DEBUG(1, (__location__ " talloc_asprintf failed\n"));
379 * Build the posix snapshot path for the connection
380 * at the given timestamp, i.e. the absolute posix path
381 * that contains the snapshot for this file system.
383 * This only applies to classical case, i.e. not
384 * to the "snapdirseverywhere" mode.
386 static char *shadow_copy2_snapshot_path(TALLOC_CTX *mem_ctx,
387 struct vfs_handle_struct *handle,
390 fstring snaptime_string;
391 ssize_t snaptime_len = 0;
393 struct shadow_copy2_private *priv;
395 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
398 snaptime_len = shadow_copy2_posix_gmt_string(handle,
401 sizeof(snaptime_string));
402 if (snaptime_len <= 0) {
406 result = talloc_asprintf(mem_ctx, "%s/%s",
407 priv->config->snapshot_basepath, snaptime_string);
408 if (result == NULL) {
409 DEBUG(1, (__location__ " talloc_asprintf failed\n"));
415 static char *make_path_absolute(TALLOC_CTX *mem_ctx,
416 struct shadow_copy2_private *priv,
419 char *newpath = NULL;
420 char *abs_path = NULL;
422 if (name[0] != '/') {
423 newpath = talloc_asprintf(mem_ctx,
427 if (newpath == NULL) {
432 abs_path = canonicalize_absolute_path(mem_ctx, name);
433 TALLOC_FREE(newpath);
437 /* Return a $cwd-relative path. */
438 static bool make_relative_path(const char *cwd, char *abs_path)
440 size_t cwd_len = strlen(cwd);
441 size_t abs_len = strlen(abs_path);
443 if (abs_len < cwd_len) {
446 if (memcmp(abs_path, cwd, cwd_len) != 0) {
449 /* The cwd_len != 1 case is for $cwd == '/' */
451 abs_path[cwd_len] != '/' &&
452 abs_path[cwd_len] != '\0')
456 if (abs_path[cwd_len] == '/') {
459 memmove(abs_path, &abs_path[cwd_len], abs_len + 1 - cwd_len);
463 static bool shadow_copy2_snapshot_to_gmt(vfs_handle_struct *handle,
465 char *gmt, size_t gmt_len);
468 * Check if an incoming filename is already a snapshot converted pathname.
470 * If so, it returns the pathname truncated at the snapshot point which
471 * will be used as the connectpath.
474 static int check_for_converted_path(TALLOC_CTX *mem_ctx,
475 struct vfs_handle_struct *handle,
476 struct shadow_copy2_private *priv,
478 bool *ppath_already_converted,
481 size_t snapdirlen = 0;
482 char *p = strstr_m(abs_path, priv->config->snapdir);
484 char *connect_path = NULL;
485 char snapshot[GMT_NAME_LEN+1];
487 *ppath_already_converted = false;
490 /* Must at least contain shadow:snapdir. */
494 if (priv->config->snapdir[0] == '/' &&
496 /* Absolute shadow:snapdir must be at the start. */
500 snapdirlen = strlen(priv->config->snapdir);
501 if (p[snapdirlen] != '/') {
502 /* shadow:snapdir must end as a separate component. */
506 if (p > abs_path && p[-1] != '/') {
507 /* shadow:snapdir must start as a separate component. */
512 p++; /* Move past the / */
515 * Need to return up to the next path
516 * component after the time.
517 * This will be used as the connectpath.
522 * No next path component.
525 connect_path = talloc_strdup(mem_ctx,
528 connect_path = talloc_strndup(mem_ctx,
532 if (connect_path == NULL) {
537 * Point p at the same offset in connect_path as
541 p = &connect_path[p - abs_path];
544 * Now ensure there is a time string at p.
545 * The SMB-format @GMT-token string is returned
549 if (!shadow_copy2_snapshot_to_gmt(handle,
553 TALLOC_FREE(connect_path);
557 if (pconnectpath != NULL) {
558 *pconnectpath = connect_path;
561 *ppath_already_converted = true;
563 DBG_DEBUG("path |%s| is already converted. "
564 "connect path = |%s|\n",
572 * This function does two things.
574 * 1). Checks if an incoming filename is already a
575 * snapshot converted pathname.
576 * If so, it returns the pathname truncated
577 * at the snapshot point which will be used
578 * as the connectpath, and then does an early return.
580 * 2). Checks if an incoming filename contains an
581 * SMB-layer @GMT- style timestamp.
582 * If so, it strips the timestamp, and returns
583 * both the timestamp and the stripped path
584 * (making it cwd-relative).
587 static bool _shadow_copy2_strip_snapshot_internal(TALLOC_CTX *mem_ctx,
588 struct vfs_handle_struct *handle,
589 const struct smb_filename *smb_fname,
593 bool *_already_converted,
594 const char *function)
596 char *stripped = NULL;
597 struct shadow_copy2_private *priv;
598 char *abs_path = NULL;
600 bool already_converted = false;
603 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
606 DBG_DEBUG("[from %s()] Path '%s'\n",
607 function, smb_fname_str_dbg(smb_fname));
609 if (_already_converted != NULL) {
610 *_already_converted = false;
613 abs_path = make_path_absolute(mem_ctx, priv, smb_fname->base_name);
614 if (abs_path == NULL) {
619 DBG_DEBUG("abs path '%s'\n", abs_path);
621 err = check_for_converted_path(mem_ctx,
628 /* error in conversion. */
633 if (already_converted) {
634 if (_already_converted != NULL) {
635 *_already_converted = true;
640 if (smb_fname->twrp == 0) {
644 if (ptimestamp != NULL) {
645 *ptimestamp = nt_time_to_unix(smb_fname->twrp);
648 if (pstripped != NULL) {
649 stripped = talloc_strdup(mem_ctx, abs_path);
650 if (stripped == NULL) {
655 if (smb_fname->base_name[0] != '/') {
656 ret = make_relative_path(priv->shadow_cwd, stripped);
658 DBG_DEBUG("Path '%s' "
659 "doesn't start with cwd '%s'\n",
660 stripped, priv->shadow_cwd);
666 *pstripped = stripped;
672 TALLOC_FREE(abs_path);
676 #define shadow_copy2_strip_snapshot_internal(mem_ctx, handle, orig_name, \
677 ptimestamp, pstripped, psnappath, _already_converted) \
678 _shadow_copy2_strip_snapshot_internal((mem_ctx), (handle), (orig_name), \
679 (ptimestamp), (pstripped), (psnappath), (_already_converted), \
682 static bool _shadow_copy2_strip_snapshot(TALLOC_CTX *mem_ctx,
683 struct vfs_handle_struct *handle,
684 const struct smb_filename *orig_name,
687 const char *function)
689 return _shadow_copy2_strip_snapshot_internal(mem_ctx,
699 #define shadow_copy2_strip_snapshot(mem_ctx, handle, orig_name, \
700 ptimestamp, pstripped) \
701 _shadow_copy2_strip_snapshot((mem_ctx), (handle), (orig_name), \
702 (ptimestamp), (pstripped), __FUNCTION__)
704 static bool _shadow_copy2_strip_snapshot_converted(TALLOC_CTX *mem_ctx,
705 struct vfs_handle_struct *handle,
706 const struct smb_filename *orig_name,
710 const char *function)
712 return _shadow_copy2_strip_snapshot_internal(mem_ctx,
722 #define shadow_copy2_strip_snapshot_converted(mem_ctx, handle, orig_name, \
723 ptimestamp, pstripped, is_converted) \
724 _shadow_copy2_strip_snapshot_converted((mem_ctx), (handle), (orig_name), \
725 (ptimestamp), (pstripped), (is_converted), __FUNCTION__)
727 static char *shadow_copy2_find_mount_point(TALLOC_CTX *mem_ctx,
728 vfs_handle_struct *handle)
730 char *path = talloc_strdup(mem_ctx, handle->conn->connectpath);
735 if (stat(path, &st) != 0) {
742 while ((p = strrchr(path, '/')) && p > path) {
744 if (stat(path, &st) != 0) {
748 if (st.st_dev != dev) {
758 * Convert from a name as handed in via the SMB layer
759 * and a timestamp into the local path of the snapshot
760 * of the provided file at the provided time.
761 * Also return the path in the snapshot corresponding
762 * to the file's share root.
764 static char *shadow_copy2_do_convert(TALLOC_CTX *mem_ctx,
765 struct vfs_handle_struct *handle,
766 const char *name, time_t timestamp,
767 size_t *snaproot_len)
769 struct smb_filename converted_fname;
771 size_t *slashes = NULL;
772 unsigned num_slashes;
776 char *converted = NULL;
777 size_t insertlen, connectlen = 0;
781 struct shadow_copy2_config *config;
782 struct shadow_copy2_private *priv;
783 size_t in_share_offset = 0;
785 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
788 config = priv->config;
790 DEBUG(10, ("converting '%s'\n", name));
792 if (!config->snapdirseverywhere) {
796 snapshot_path = shadow_copy2_snapshot_path(talloc_tos(),
799 if (snapshot_path == NULL) {
803 if (config->rel_connectpath == NULL) {
804 converted = talloc_asprintf(mem_ctx, "%s/%s",
805 snapshot_path, name);
807 converted = talloc_asprintf(mem_ctx, "%s/%s/%s",
809 config->rel_connectpath,
812 if (converted == NULL) {
816 ZERO_STRUCT(converted_fname);
817 converted_fname.base_name = converted;
819 ret = SMB_VFS_NEXT_LSTAT(handle, &converted_fname);
820 DEBUG(10, ("Trying[not snapdirseverywhere] %s: %d (%s)\n",
822 ret, ret == 0 ? "ok" : strerror(errno)));
824 DEBUG(10, ("Found %s\n", converted));
827 if (snaproot_len != NULL) {
828 *snaproot_len = strlen(snapshot_path);
829 if (config->rel_connectpath != NULL) {
831 strlen(config->rel_connectpath) + 1;
839 /* never reached ... */
842 connectlen = strlen(handle->conn->connectpath);
844 path = talloc_strdup(mem_ctx, handle->conn->connectpath);
846 path = talloc_asprintf(
847 mem_ctx, "%s/%s", handle->conn->connectpath, name);
853 pathlen = talloc_get_size(path)-1;
855 if (!shadow_copy2_find_slashes(talloc_tos(), path,
856 &slashes, &num_slashes)) {
860 insert = shadow_copy2_insert_string(talloc_tos(), handle, timestamp);
861 if (insert == NULL) {
864 insertlen = talloc_get_size(insert)-1;
867 * Note: We deliberatly don't expensively initialize the
868 * array with talloc_zero here: Putting zero into
869 * converted[pathlen+insertlen] below is sufficient, because
870 * in the following for loop, the insert string is inserted
871 * at various slash places. So the memory up to position
872 * pathlen+insertlen will always be initialized when the
873 * converted string is used.
875 converted = talloc_array(mem_ctx, char, pathlen + insertlen + 1);
876 if (converted == NULL) {
880 if (path[pathlen-1] != '/') {
882 * Append a fake slash to find the snapshot root
885 tmp = talloc_realloc(talloc_tos(), slashes,
886 size_t, num_slashes+1);
891 slashes[num_slashes] = pathlen;
897 if (!config->crossmountpoints) {
898 min_offset = strlen(config->mount_point);
901 memcpy(converted, path, pathlen+1);
902 converted[pathlen+insertlen] = '\0';
904 ZERO_STRUCT(converted_fname);
905 converted_fname.base_name = converted;
907 for (i = num_slashes-1; i>=0; i--) {
913 if (offset < min_offset) {
918 if (offset >= connectlen) {
919 in_share_offset = offset;
922 memcpy(converted+offset, insert, insertlen);
925 memcpy(converted+offset, path + slashes[i],
926 pathlen - slashes[i]);
928 ret = SMB_VFS_NEXT_LSTAT(handle, &converted_fname);
930 DEBUG(10, ("Trying[snapdirseverywhere] %s: %d (%s)\n",
932 ret, ret == 0 ? "ok" : strerror(errno)));
935 if (snaproot_len != NULL) {
936 *snaproot_len = in_share_offset + insertlen;
940 if (errno == ENOTDIR) {
942 * This is a valid condition: We appended the
943 * .snapshots/@GMT.. to a file name. Just try
944 * with the upper levels.
948 if (errno != ENOENT) {
949 /* Other problem than "not found" */
958 DEBUG(10, ("Found %s\n", converted));
965 if (result == NULL) {
968 TALLOC_FREE(converted);
970 TALLOC_FREE(slashes);
972 if (saved_errno != 0) {
979 * Convert from a name as handed in via the SMB layer
980 * and a timestamp into the local path of the snapshot
981 * of the provided file at the provided time.
983 static char *shadow_copy2_convert(TALLOC_CTX *mem_ctx,
984 struct vfs_handle_struct *handle,
985 const char *name, time_t timestamp)
987 return shadow_copy2_do_convert(mem_ctx, handle, name, timestamp, NULL);
991 modify a sbuf return to ensure that inodes in the shadow directory
992 are different from those in the main directory
994 static void convert_sbuf(vfs_handle_struct *handle, const char *fname,
995 SMB_STRUCT_STAT *sbuf)
997 struct shadow_copy2_private *priv;
999 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1002 if (priv->config->fixinodes) {
1003 /* some snapshot systems, like GPFS, return the same
1004 device:inode for the snapshot files as the current
1005 files. That breaks the 'restore' button in the shadow copy
1006 GUI, as the client gets a sharing violation.
1008 This is a crude way of allowing both files to be
1009 open at once. It has a slight chance of inode
1010 number collision, but I can't see a better approach
1011 without significant VFS changes
1013 TDB_DATA key = { .dptr = discard_const_p(uint8_t, fname),
1014 .dsize = strlen(fname) };
1017 shash = tdb_jenkins_hash(&key) & 0xFF000000;
1021 sbuf->st_ex_ino ^= shash;
1025 static int shadow_copy2_renameat(vfs_handle_struct *handle,
1026 files_struct *srcfsp,
1027 const struct smb_filename *smb_fname_src,
1028 files_struct *dstfsp,
1029 const struct smb_filename *smb_fname_dst)
1031 time_t timestamp_src = 0;
1032 time_t timestamp_dst = 0;
1033 char *snappath_src = NULL;
1034 char *snappath_dst = NULL;
1036 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(), handle,
1038 ×tamp_src, NULL, &snappath_src,
1042 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(), handle,
1044 ×tamp_dst, NULL, &snappath_dst,
1048 if (timestamp_src != 0) {
1052 if (timestamp_dst != 0) {
1057 * Don't allow rename on already converted paths.
1059 if (snappath_src != NULL) {
1063 if (snappath_dst != NULL) {
1067 return SMB_VFS_NEXT_RENAMEAT(handle,
1074 static int shadow_copy2_symlinkat(vfs_handle_struct *handle,
1075 const struct smb_filename *link_contents,
1076 struct files_struct *dirfsp,
1077 const struct smb_filename *new_smb_fname)
1079 time_t timestamp_old = 0;
1080 time_t timestamp_new = 0;
1081 char *snappath_old = NULL;
1082 char *snappath_new = NULL;
1084 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1093 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1102 if ((timestamp_old != 0) || (timestamp_new != 0)) {
1107 * Don't allow symlinks on already converted paths.
1109 if ((snappath_old != NULL) || (snappath_new != NULL)) {
1113 return SMB_VFS_NEXT_SYMLINKAT(handle,
1119 static int shadow_copy2_linkat(vfs_handle_struct *handle,
1120 files_struct *srcfsp,
1121 const struct smb_filename *old_smb_fname,
1122 files_struct *dstfsp,
1123 const struct smb_filename *new_smb_fname,
1126 time_t timestamp_old = 0;
1127 time_t timestamp_new = 0;
1128 char *snappath_old = NULL;
1129 char *snappath_new = NULL;
1131 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1140 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1149 if ((timestamp_old != 0) || (timestamp_new != 0)) {
1154 * Don't allow links on already converted paths.
1156 if ((snappath_old != NULL) || (snappath_new != NULL)) {
1160 return SMB_VFS_NEXT_LINKAT(handle,
1168 static int shadow_copy2_stat(vfs_handle_struct *handle,
1169 struct smb_filename *smb_fname)
1171 struct shadow_copy2_private *priv = NULL;
1172 time_t timestamp = 0;
1173 char *stripped = NULL;
1174 bool converted = false;
1175 char *abspath = NULL;
1179 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1182 if (!shadow_copy2_strip_snapshot_converted(talloc_tos(),
1190 if (timestamp == 0) {
1191 TALLOC_FREE(stripped);
1192 ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
1200 abspath = make_path_absolute(talloc_tos(),
1202 smb_fname->base_name);
1203 if (abspath == NULL) {
1207 convert_sbuf(handle, abspath, &smb_fname->st);
1208 TALLOC_FREE(abspath);
1212 tmp = smb_fname->base_name;
1213 smb_fname->base_name = shadow_copy2_convert(
1214 talloc_tos(), handle, stripped, timestamp);
1215 TALLOC_FREE(stripped);
1217 if (smb_fname->base_name == NULL) {
1218 smb_fname->base_name = tmp;
1222 ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
1227 abspath = make_path_absolute(talloc_tos(),
1229 smb_fname->base_name);
1230 if (abspath == NULL) {
1235 convert_sbuf(handle, abspath, &smb_fname->st);
1236 TALLOC_FREE(abspath);
1239 TALLOC_FREE(smb_fname->base_name);
1240 smb_fname->base_name = tmp;
1245 static int shadow_copy2_lstat(vfs_handle_struct *handle,
1246 struct smb_filename *smb_fname)
1248 struct shadow_copy2_private *priv = NULL;
1249 time_t timestamp = 0;
1250 char *stripped = NULL;
1251 bool converted = false;
1252 char *abspath = NULL;
1256 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1259 if (!shadow_copy2_strip_snapshot_converted(talloc_tos(),
1267 if (timestamp == 0) {
1268 TALLOC_FREE(stripped);
1269 ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
1277 abspath = make_path_absolute(talloc_tos(),
1279 smb_fname->base_name);
1280 if (abspath == NULL) {
1284 convert_sbuf(handle, abspath, &smb_fname->st);
1285 TALLOC_FREE(abspath);
1289 tmp = smb_fname->base_name;
1290 smb_fname->base_name = shadow_copy2_convert(
1291 talloc_tos(), handle, stripped, timestamp);
1292 TALLOC_FREE(stripped);
1294 if (smb_fname->base_name == NULL) {
1295 smb_fname->base_name = tmp;
1299 ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
1304 abspath = make_path_absolute(talloc_tos(),
1306 smb_fname->base_name);
1307 if (abspath == NULL) {
1312 convert_sbuf(handle, abspath, &smb_fname->st);
1313 TALLOC_FREE(abspath);
1316 TALLOC_FREE(smb_fname->base_name);
1317 smb_fname->base_name = tmp;
1322 static int shadow_copy2_fstat(vfs_handle_struct *handle, files_struct *fsp,
1323 SMB_STRUCT_STAT *sbuf)
1325 struct shadow_copy2_private *priv = NULL;
1326 time_t timestamp = 0;
1327 struct smb_filename *orig_smb_fname = NULL;
1328 struct smb_filename vss_smb_fname;
1329 struct smb_filename *orig_base_smb_fname = NULL;
1330 struct smb_filename vss_base_smb_fname;
1331 char *stripped = NULL;
1332 char *abspath = NULL;
1333 bool converted = false;
1337 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1340 ok = shadow_copy2_strip_snapshot_converted(talloc_tos(),
1350 if (timestamp == 0) {
1351 TALLOC_FREE(stripped);
1352 ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
1360 abspath = make_path_absolute(talloc_tos(),
1362 fsp->fsp_name->base_name);
1363 if (abspath == NULL) {
1367 convert_sbuf(handle, abspath, sbuf);
1368 TALLOC_FREE(abspath);
1372 vss_smb_fname = *fsp->fsp_name;
1373 vss_smb_fname.base_name = shadow_copy2_convert(talloc_tos(),
1377 TALLOC_FREE(stripped);
1378 if (vss_smb_fname.base_name == NULL) {
1382 orig_smb_fname = fsp->fsp_name;
1383 fsp->fsp_name = &vss_smb_fname;
1385 if (fsp_is_alternate_stream(fsp)) {
1386 vss_base_smb_fname = *fsp->base_fsp->fsp_name;
1387 vss_base_smb_fname.base_name = vss_smb_fname.base_name;
1388 orig_base_smb_fname = fsp->base_fsp->fsp_name;
1389 fsp->base_fsp->fsp_name = &vss_base_smb_fname;
1392 ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
1397 abspath = make_path_absolute(talloc_tos(),
1399 fsp->fsp_name->base_name);
1400 if (abspath == NULL) {
1405 convert_sbuf(handle, abspath, sbuf);
1406 TALLOC_FREE(abspath);
1409 fsp->fsp_name = orig_smb_fname;
1410 if (fsp_is_alternate_stream(fsp)) {
1411 fsp->base_fsp->fsp_name = orig_base_smb_fname;
1417 static int shadow_copy2_fstatat(
1418 struct vfs_handle_struct *handle,
1419 const struct files_struct *dirfsp,
1420 const struct smb_filename *smb_fname_in,
1421 SMB_STRUCT_STAT *sbuf,
1424 struct shadow_copy2_private *priv = NULL;
1425 struct smb_filename *smb_fname = NULL;
1426 time_t timestamp = 0;
1427 char *stripped = NULL;
1428 char *abspath = NULL;
1429 bool converted = false;
1433 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1436 smb_fname = full_path_from_dirfsp_atname(talloc_tos(),
1439 if (smb_fname == NULL) {
1444 ok = shadow_copy2_strip_snapshot_converted(talloc_tos(),
1453 if (timestamp == 0) {
1454 TALLOC_FREE(stripped);
1455 ret = SMB_VFS_NEXT_FSTATAT(
1456 handle, dirfsp, smb_fname_in, sbuf, flags);
1464 abspath = make_path_absolute(
1465 talloc_tos(), priv, smb_fname->base_name);
1466 if (abspath == NULL) {
1471 convert_sbuf(handle, abspath, sbuf);
1472 TALLOC_FREE(abspath);
1476 smb_fname->base_name = shadow_copy2_convert(
1477 smb_fname, handle, stripped, timestamp);
1478 TALLOC_FREE(stripped);
1479 if (smb_fname->base_name == NULL) {
1480 TALLOC_FREE(smb_fname);
1485 ret = SMB_VFS_NEXT_FSTATAT(handle,
1491 int saved_errno = errno;
1492 TALLOC_FREE(smb_fname);
1493 errno = saved_errno;
1497 abspath = make_path_absolute(
1498 talloc_tos(), priv, smb_fname->base_name);
1499 if (abspath == NULL) {
1500 TALLOC_FREE(smb_fname);
1505 convert_sbuf(handle, abspath, sbuf);
1506 TALLOC_FREE(abspath);
1508 TALLOC_FREE(smb_fname);
1513 static int shadow_copy2_openat(vfs_handle_struct *handle,
1514 const struct files_struct *dirfsp,
1515 const struct smb_filename *smb_fname_in,
1516 struct files_struct *fsp,
1520 struct smb_filename *smb_fname = NULL;
1521 time_t timestamp = 0;
1522 char *stripped = NULL;
1523 bool is_converted = false;
1524 int saved_errno = 0;
1528 smb_fname = full_path_from_dirfsp_atname(talloc_tos(),
1531 if (smb_fname == NULL) {
1536 ok = shadow_copy2_strip_snapshot_converted(talloc_tos(),
1545 if (timestamp == 0) {
1548 * Just pave over the user requested mode and use
1549 * O_RDONLY. Later attempts by the client to write on
1550 * the handle will fail in the pwrite() syscall with
1551 * EINVAL which we carefully map to EROFS. In sum, this
1552 * matches Windows behaviour.
1554 flags &= ~(O_WRONLY | O_RDWR | O_CREAT);
1556 return SMB_VFS_NEXT_OPENAT(handle,
1564 smb_fname->base_name = shadow_copy2_convert(smb_fname,
1568 if (smb_fname->base_name == NULL) {
1570 TALLOC_FREE(stripped);
1571 TALLOC_FREE(smb_fname);
1575 TALLOC_FREE(stripped);
1578 * Just pave over the user requested mode and use O_RDONLY. Later
1579 * attempts by the client to write on the handle will fail in the
1580 * pwrite() syscall with EINVAL which we carefully map to EROFS. In sum,
1581 * this matches Windows behaviour.
1583 flags &= ~(O_WRONLY | O_RDWR | O_CREAT);
1585 ret = SMB_VFS_NEXT_OPENAT(handle,
1592 saved_errno = errno;
1595 TALLOC_FREE(smb_fname);
1597 if (saved_errno != 0) {
1598 errno = saved_errno;
1603 static int shadow_copy2_unlinkat(vfs_handle_struct *handle,
1604 struct files_struct *dirfsp,
1605 const struct smb_filename *smb_fname,
1608 time_t timestamp = 0;
1610 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1612 ×tamp, NULL)) {
1615 if (timestamp != 0) {
1619 return SMB_VFS_NEXT_UNLINKAT(handle,
1625 static int shadow_copy2_fchmod(vfs_handle_struct *handle,
1626 struct files_struct *fsp,
1629 time_t timestamp = 0;
1630 const struct smb_filename *smb_fname = NULL;
1632 smb_fname = fsp->fsp_name;
1633 if (!shadow_copy2_strip_snapshot(talloc_tos(),
1640 if (timestamp != 0) {
1644 return SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
1647 static void store_cwd_data(vfs_handle_struct *handle,
1648 const char *connectpath)
1650 struct shadow_copy2_private *priv = NULL;
1651 struct smb_filename *cwd_fname = NULL;
1653 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1656 TALLOC_FREE(priv->shadow_cwd);
1657 cwd_fname = SMB_VFS_NEXT_GETWD(handle, talloc_tos());
1658 if (cwd_fname == NULL) {
1659 smb_panic("getwd failed\n");
1661 DBG_DEBUG("shadow cwd = %s\n", cwd_fname->base_name);
1662 priv->shadow_cwd = talloc_strdup(priv, cwd_fname->base_name);
1663 TALLOC_FREE(cwd_fname);
1664 if (priv->shadow_cwd == NULL) {
1665 smb_panic("talloc failed\n");
1667 TALLOC_FREE(priv->shadow_connectpath);
1669 DBG_DEBUG("shadow connectpath = %s\n", connectpath);
1670 priv->shadow_connectpath = talloc_strdup(priv, connectpath);
1671 if (priv->shadow_connectpath == NULL) {
1672 smb_panic("talloc failed\n");
1677 static int shadow_copy2_chdir(vfs_handle_struct *handle,
1678 const struct smb_filename *smb_fname)
1680 time_t timestamp = 0;
1681 char *stripped = NULL;
1682 char *snappath = NULL;
1684 int saved_errno = 0;
1686 size_t rootpath_len = 0;
1687 struct smb_filename *conv_smb_fname = NULL;
1689 if (!shadow_copy2_strip_snapshot_internal(talloc_tos(),
1698 if (stripped != NULL) {
1699 conv = shadow_copy2_do_convert(talloc_tos(),
1704 TALLOC_FREE(stripped);
1708 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
1715 conv_smb_fname = cp_smb_filename(talloc_tos(), smb_fname);
1718 if (conv_smb_fname == NULL) {
1724 ret = SMB_VFS_NEXT_CHDIR(handle, conv_smb_fname);
1726 saved_errno = errno;
1730 if (conv != NULL && rootpath_len != 0) {
1731 conv[rootpath_len] = '\0';
1732 } else if (snappath != 0) {
1736 store_cwd_data(handle, conv);
1739 TALLOC_FREE(stripped);
1741 TALLOC_FREE(conv_smb_fname);
1743 if (saved_errno != 0) {
1744 errno = saved_errno;
1749 static int shadow_copy2_fntimes(vfs_handle_struct *handle,
1751 struct smb_file_time *ft)
1753 time_t timestamp = 0;
1755 if (!shadow_copy2_strip_snapshot(talloc_tos(),
1762 if (timestamp != 0) {
1766 return SMB_VFS_NEXT_FNTIMES(handle, fsp, ft);
1769 static int shadow_copy2_readlinkat(vfs_handle_struct *handle,
1770 const struct files_struct *dirfsp,
1771 const struct smb_filename *smb_fname,
1775 time_t timestamp = 0;
1776 char *stripped = NULL;
1777 int saved_errno = 0;
1779 struct smb_filename *full_fname = NULL;
1780 struct smb_filename *conv = NULL;
1782 full_fname = full_path_from_dirfsp_atname(talloc_tos(),
1785 if (full_fname == NULL) {
1790 if (!shadow_copy2_strip_snapshot(talloc_tos(),
1795 TALLOC_FREE(full_fname);
1799 if (timestamp == 0) {
1800 TALLOC_FREE(full_fname);
1801 TALLOC_FREE(stripped);
1802 return SMB_VFS_NEXT_READLINKAT(handle,
1808 conv = cp_smb_filename(talloc_tos(), full_fname);
1810 TALLOC_FREE(full_fname);
1811 TALLOC_FREE(stripped);
1815 TALLOC_FREE(full_fname);
1816 conv->base_name = shadow_copy2_convert(
1817 conv, handle, stripped, timestamp);
1818 TALLOC_FREE(stripped);
1819 if (conv->base_name == NULL) {
1822 ret = SMB_VFS_NEXT_READLINKAT(handle,
1823 handle->conn->cwd_fsp,
1828 saved_errno = errno;
1831 if (saved_errno != 0) {
1832 errno = saved_errno;
1837 static int shadow_copy2_mknodat(vfs_handle_struct *handle,
1838 files_struct *dirfsp,
1839 const struct smb_filename *smb_fname,
1843 time_t timestamp = 0;
1845 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1847 ×tamp, NULL)) {
1850 if (timestamp != 0) {
1854 return SMB_VFS_NEXT_MKNODAT(handle,
1861 static struct smb_filename *shadow_copy2_realpath(vfs_handle_struct *handle,
1863 const struct smb_filename *smb_fname)
1865 time_t timestamp = 0;
1866 char *stripped = NULL;
1867 struct smb_filename *result_fname = NULL;
1868 struct smb_filename *conv_fname = NULL;
1869 int saved_errno = 0;
1871 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1873 ×tamp, &stripped)) {
1876 if (timestamp == 0) {
1877 return SMB_VFS_NEXT_REALPATH(handle, ctx, smb_fname);
1880 conv_fname = cp_smb_filename(talloc_tos(), smb_fname);
1881 if (conv_fname == NULL) {
1884 conv_fname->base_name = shadow_copy2_convert(
1885 conv_fname, handle, stripped, timestamp);
1886 if (conv_fname->base_name == NULL) {
1890 result_fname = SMB_VFS_NEXT_REALPATH(handle, ctx, conv_fname);
1893 if (result_fname == NULL) {
1894 saved_errno = errno;
1896 TALLOC_FREE(conv_fname);
1897 TALLOC_FREE(stripped);
1898 if (saved_errno != 0) {
1899 errno = saved_errno;
1901 return result_fname;
1905 * Check whether a given directory contains a
1906 * snapshot directory as direct subdirectory.
1907 * If yes, return the path of the snapshot-subdir,
1908 * otherwise return NULL.
1910 static char *have_snapdir(struct vfs_handle_struct *handle,
1913 struct smb_filename smb_fname;
1915 struct shadow_copy2_private *priv;
1917 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1920 ZERO_STRUCT(smb_fname);
1921 smb_fname.base_name = talloc_asprintf(talloc_tos(), "%s/%s",
1922 path, priv->config->snapdir);
1923 if (smb_fname.base_name == NULL) {
1927 ret = SMB_VFS_NEXT_STAT(handle, &smb_fname);
1928 if ((ret == 0) && (S_ISDIR(smb_fname.st.st_ex_mode))) {
1929 return smb_fname.base_name;
1931 TALLOC_FREE(smb_fname.base_name);
1936 * Find the snapshot directory (if any) for the given
1937 * filename (which is relative to the share).
1939 static const char *shadow_copy2_find_snapdir(TALLOC_CTX *mem_ctx,
1940 struct vfs_handle_struct *handle,
1941 struct smb_filename *smb_fname)
1944 const char *snapdir;
1945 struct shadow_copy2_config *config;
1946 struct shadow_copy2_private *priv;
1948 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
1951 config = priv->config;
1954 * If the non-snapdisrseverywhere mode, we should not search!
1956 if (!config->snapdirseverywhere) {
1957 return config->snapshot_basepath;
1960 path = talloc_asprintf(mem_ctx, "%s/%s",
1961 handle->conn->connectpath,
1962 smb_fname->base_name);
1967 snapdir = have_snapdir(handle, path);
1968 if (snapdir != NULL) {
1973 while ((p = strrchr(path, '/')) && (p > path)) {
1977 snapdir = have_snapdir(handle, path);
1978 if (snapdir != NULL) {
1987 static bool shadow_copy2_snapshot_to_gmt(vfs_handle_struct *handle,
1989 char *gmt, size_t gmt_len)
1991 struct tm timestamp;
1993 unsigned long int timestamp_long;
1995 struct shadow_copy2_config *config;
1996 struct shadow_copy2_private *priv;
1997 char *tmpstr = NULL;
1999 bool converted = false;
2002 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2005 config = priv->config;
2007 fmt = config->gmt_format;
2010 * If regex is provided, then we will have to parse the
2011 * filename which will contain both the prefix and the time format.
2012 * e.g. <prefix><delimiter><time_format>
2014 if (priv->snaps->regex != NULL) {
2015 tmpstr = talloc_strdup(talloc_tos(), name);
2016 /* point "name" to the time format */
2017 name = strstr(name, priv->config->delimiter);
2021 /* Extract the prefix */
2022 tmp = strstr(tmpstr, priv->config->delimiter);
2029 ret = regexec(priv->snaps->regex, tmpstr, 0, NULL, 0);
2031 DBG_DEBUG("shadow_copy2_snapshot_to_gmt: "
2032 "no regex match for %s\n", tmpstr);
2037 ZERO_STRUCT(timestamp);
2038 if (config->use_sscanf) {
2039 if (sscanf(name, fmt, ×tamp_long) != 1) {
2040 DEBUG(10, ("shadow_copy2_snapshot_to_gmt: "
2041 "no sscanf match %s: %s\n",
2045 timestamp_t = timestamp_long;
2046 gmtime_r(×tamp_t, ×tamp);
2048 if (strptime(name, fmt, ×tamp) == NULL) {
2049 DEBUG(10, ("shadow_copy2_snapshot_to_gmt: "
2050 "no match %s: %s\n",
2054 DEBUG(10, ("shadow_copy2_snapshot_to_gmt: match %s: %s\n",
2057 if (config->use_localtime) {
2058 timestamp.tm_isdst = -1;
2059 timestamp_t = mktime(×tamp);
2060 gmtime_r(×tamp_t, ×tamp);
2064 strftime(gmt, gmt_len, GMT_FORMAT, ×tamp);
2068 TALLOC_FREE(tmpstr);
2072 static int shadow_copy2_label_cmp_asc(const void *x, const void *y)
2074 return strncmp((const char *)x, (const char *)y, sizeof(SHADOW_COPY_LABEL));
2077 static int shadow_copy2_label_cmp_desc(const void *x, const void *y)
2079 return -strncmp((const char *)x, (const char *)y, sizeof(SHADOW_COPY_LABEL));
2083 sort the shadow copy data in ascending or descending order
2085 static void shadow_copy2_sort_data(vfs_handle_struct *handle,
2086 struct shadow_copy_data *shadow_copy2_data)
2088 int (*cmpfunc)(const void *, const void *);
2090 struct shadow_copy2_private *priv;
2092 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2095 sort = priv->config->sort_order;
2100 if (strcmp(sort, "asc") == 0) {
2101 cmpfunc = shadow_copy2_label_cmp_asc;
2102 } else if (strcmp(sort, "desc") == 0) {
2103 cmpfunc = shadow_copy2_label_cmp_desc;
2108 if (shadow_copy2_data && shadow_copy2_data->num_volumes > 0 &&
2109 shadow_copy2_data->labels)
2111 TYPESAFE_QSORT(shadow_copy2_data->labels,
2112 shadow_copy2_data->num_volumes,
2117 static int shadow_copy2_get_shadow_copy_data(
2118 vfs_handle_struct *handle, files_struct *fsp,
2119 struct shadow_copy_data *shadow_copy2_data,
2123 const char *snapdir;
2124 struct smb_filename *snapdir_smb_fname = NULL;
2125 struct files_struct *dirfsp = NULL;
2126 struct files_struct *fspcwd = NULL;
2128 TALLOC_CTX *tmp_ctx = talloc_stackframe();
2129 struct shadow_copy2_private *priv = NULL;
2130 struct shadow_copy2_snapentry *tmpentry = NULL;
2131 bool get_snaplist = false;
2132 int open_flags = O_RDONLY;
2136 int saved_errno = 0;
2138 snapdir = shadow_copy2_find_snapdir(tmp_ctx, handle, fsp->fsp_name);
2139 if (snapdir == NULL) {
2140 DEBUG(0,("shadow:snapdir not found for %s in get_shadow_copy_data\n",
2141 handle->conn->connectpath));
2146 snapdir_smb_fname = synthetic_smb_fname(talloc_tos(),
2151 fsp->fsp_name->flags);
2152 if (snapdir_smb_fname == NULL) {
2157 status = create_internal_dirfsp(handle->conn,
2160 if (!NT_STATUS_IS_OK(status)) {
2161 DBG_WARNING("create_internal_dir_fsp() failed for '%s'"
2162 " - %s\n", snapdir, nt_errstr(status));
2167 status = vfs_at_fspcwd(talloc_tos(), handle->conn, &fspcwd);
2168 if (!NT_STATUS_IS_OK(status)) {
2174 open_flags |= O_DIRECTORY;
2177 fd = SMB_VFS_NEXT_OPENAT(handle,
2184 DBG_WARNING("SMB_VFS_NEXT_OPEN failed for '%s'"
2185 " - %s\n", snapdir, strerror(errno));
2189 fsp_set_fd(dirfsp, fd);
2191 /* Now we have the handle, check access here. */
2192 status = smbd_check_access_rights_fsp(fspcwd,
2196 if (!NT_STATUS_IS_OK(status)) {
2197 DBG_ERR("user does not have list permission "
2199 fsp_str_dbg(dirfsp));
2204 p = SMB_VFS_NEXT_FDOPENDIR(handle, dirfsp, NULL, 0);
2206 DBG_NOTICE("shadow_copy2: SMB_VFS_NEXT_FDOPENDIR() failed for '%s'"
2207 " - %s\n", snapdir, strerror(errno));
2212 if (shadow_copy2_data != NULL) {
2213 shadow_copy2_data->num_volumes = 0;
2214 shadow_copy2_data->labels = NULL;
2217 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2221 * Normally this function is called twice once with labels = false and
2222 * then with labels = true. When labels is false it will return the
2223 * number of volumes so that the caller can allocate memory for that
2224 * many labels. Therefore to eliminate snaplist both the times it is
2225 * good to check if labels is set or not.
2227 * shadow_copy2_data is NULL when we only want to update the list and
2228 * don't want any labels.
2230 if ((priv->snaps->regex != NULL) && (labels || shadow_copy2_data == NULL)) {
2231 get_snaplist = true;
2232 /* Reset the global snaplist */
2233 shadow_copy2_delete_snaplist(priv);
2235 /* Set the current time as snaplist update time */
2236 time(&(priv->snaps->fetch_time));
2239 while ((d = SMB_VFS_NEXT_READDIR(handle, dirfsp, p, NULL))) {
2240 char snapshot[GMT_NAME_LEN+1];
2241 SHADOW_COPY_LABEL *tlabels;
2244 * ignore names not of the right form in the snapshot
2247 if (!shadow_copy2_snapshot_to_gmt(
2249 snapshot, sizeof(snapshot))) {
2251 DEBUG(6, ("shadow_copy2_get_shadow_copy_data: "
2252 "ignoring %s\n", d->d_name));
2255 DEBUG(6,("shadow_copy2_get_shadow_copy_data: %s -> %s\n",
2256 d->d_name, snapshot));
2260 * Create a snap entry for each successful
2263 tmpentry = shadow_copy2_create_snapentry(priv);
2264 if (tmpentry == NULL) {
2265 DBG_ERR("talloc_zero() failed\n");
2268 tmpentry->snapname = talloc_strdup(tmpentry, d->d_name);
2269 tmpentry->time_fmt = talloc_strdup(tmpentry, snapshot);
2272 if (shadow_copy2_data == NULL) {
2277 /* the caller doesn't want the labels */
2278 shadow_copy2_data->num_volumes++;
2282 tlabels = talloc_realloc(shadow_copy2_data,
2283 shadow_copy2_data->labels,
2285 shadow_copy2_data->num_volumes+1);
2286 if (tlabels == NULL) {
2287 DEBUG(0,("shadow_copy2: out of memory\n"));
2291 strlcpy(tlabels[shadow_copy2_data->num_volumes], snapshot,
2294 shadow_copy2_data->num_volumes++;
2295 shadow_copy2_data->labels = tlabels;
2298 shadow_copy2_sort_data(handle, shadow_copy2_data);
2303 saved_errno = errno;
2305 TALLOC_FREE(fspcwd );
2307 SMB_VFS_NEXT_CLOSEDIR(handle, p);
2309 if (dirfsp != NULL) {
2311 * VFS_CLOSEDIR implicitly
2312 * closed the associated fd.
2314 fsp_set_fd(dirfsp, -1);
2317 if (dirfsp != NULL) {
2319 file_free(NULL, dirfsp);
2321 TALLOC_FREE(tmp_ctx);
2322 if (saved_errno != 0) {
2323 errno = saved_errno;
2328 static int shadow_copy2_mkdirat(vfs_handle_struct *handle,
2329 struct files_struct *dirfsp,
2330 const struct smb_filename *smb_fname,
2333 struct smb_filename *full_fname = NULL;
2334 time_t timestamp = 0;
2336 full_fname = full_path_from_dirfsp_atname(talloc_tos(),
2339 if (full_fname == NULL) {
2344 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2351 TALLOC_FREE(full_fname);
2352 if (timestamp != 0) {
2356 return SMB_VFS_NEXT_MKDIRAT(handle,
2362 static int shadow_copy2_fchflags(vfs_handle_struct *handle,
2363 struct files_struct *fsp,
2366 time_t timestamp = 0;
2368 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2375 if (timestamp != 0) {
2379 return SMB_VFS_NEXT_FCHFLAGS(handle, fsp, flags);
2382 static int shadow_copy2_fsetxattr(struct vfs_handle_struct *handle,
2383 struct files_struct *fsp,
2384 const char *aname, const void *value,
2385 size_t size, int flags)
2387 time_t timestamp = 0;
2388 const struct smb_filename *smb_fname = NULL;
2390 smb_fname = fsp->fsp_name;
2391 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2398 if (timestamp != 0) {
2402 return SMB_VFS_NEXT_FSETXATTR(handle, fsp,
2403 aname, value, size, flags);
2406 static NTSTATUS shadow_copy2_create_dfs_pathat(struct vfs_handle_struct *handle,
2407 struct files_struct *dirfsp,
2408 const struct smb_filename *smb_fname,
2409 const struct referral *reflist,
2410 size_t referral_count)
2412 time_t timestamp = 0;
2414 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2419 return NT_STATUS_NO_MEMORY;
2421 if (timestamp != 0) {
2422 return NT_STATUS_MEDIA_WRITE_PROTECTED;
2424 return SMB_VFS_NEXT_CREATE_DFS_PATHAT(handle,
2431 static NTSTATUS shadow_copy2_read_dfs_pathat(struct vfs_handle_struct *handle,
2432 TALLOC_CTX *mem_ctx,
2433 struct files_struct *dirfsp,
2434 struct smb_filename *smb_fname,
2435 struct referral **ppreflist,
2436 size_t *preferral_count)
2438 time_t timestamp = 0;
2439 char *stripped = NULL;
2440 struct smb_filename *full_fname = NULL;
2441 struct smb_filename *conv = NULL;
2444 full_fname = full_path_from_dirfsp_atname(talloc_tos(),
2447 if (full_fname == NULL) {
2448 return NT_STATUS_NO_MEMORY;
2451 if (!shadow_copy2_strip_snapshot(mem_ctx,
2456 TALLOC_FREE(full_fname);
2457 return NT_STATUS_NO_MEMORY;
2459 if (timestamp == 0) {
2460 TALLOC_FREE(full_fname);
2461 TALLOC_FREE(stripped);
2462 return SMB_VFS_NEXT_READ_DFS_PATHAT(handle,
2470 conv = cp_smb_filename(mem_ctx, full_fname);
2472 TALLOC_FREE(full_fname);
2473 TALLOC_FREE(stripped);
2474 return NT_STATUS_NO_MEMORY;
2476 TALLOC_FREE(full_fname);
2477 conv->base_name = shadow_copy2_convert(conv,
2481 TALLOC_FREE(stripped);
2482 if (conv->base_name == NULL) {
2484 return NT_STATUS_NO_MEMORY;
2487 status = SMB_VFS_NEXT_READ_DFS_PATHAT(handle,
2489 handle->conn->cwd_fsp,
2494 if (NT_STATUS_IS_OK(status)) {
2495 /* Return any stat(2) info. */
2496 smb_fname->st = conv->st;
2503 static NTSTATUS shadow_copy2_get_real_filename_at(
2504 struct vfs_handle_struct *handle,
2505 struct files_struct *dirfsp,
2507 TALLOC_CTX *mem_ctx,
2510 struct shadow_copy2_private *priv = NULL;
2511 time_t timestamp = 0;
2512 char *stripped = NULL;
2514 struct smb_filename *conv_fname = NULL;
2518 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2519 return NT_STATUS_INTERNAL_ERROR);
2521 DBG_DEBUG("Path=[%s] name=[%s]\n", fsp_str_dbg(dirfsp), name);
2523 ok = shadow_copy2_strip_snapshot(
2524 talloc_tos(), handle, dirfsp->fsp_name, ×tamp, &stripped);
2526 status = map_nt_error_from_unix(errno);
2527 DEBUG(10, ("shadow_copy2_strip_snapshot failed\n"));
2530 if (timestamp == 0) {
2531 DEBUG(10, ("timestamp == 0\n"));
2532 return SMB_VFS_NEXT_GET_REAL_FILENAME_AT(
2533 handle, dirfsp, name, mem_ctx, found_name);
2537 * Note that stripped may be an empty string "" if path was ".". As
2538 * shadow_copy2_convert() combines "" with the shadow-copy tree connect
2539 * root fullpath and get_real_filename_full_scan() has an explicit check
2540 * for "" this works.
2542 DBG_DEBUG("stripped [%s]\n", stripped);
2544 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2546 status = map_nt_error_from_unix(errno);
2547 DBG_DEBUG("shadow_copy2_convert [%s] failed: %s\n",
2553 status = synthetic_pathref(
2555 dirfsp->conn->cwd_fsp,
2562 if (!NT_STATUS_IS_OK(status)) {
2566 DEBUG(10, ("Calling NEXT_GET_REAL_FILE_NAME for conv=[%s], "
2567 "name=[%s]\n", conv, name));
2568 status = SMB_VFS_NEXT_GET_REAL_FILENAME_AT(
2569 handle, conv_fname->fsp, name, mem_ctx, found_name);
2570 DEBUG(10, ("NEXT_REAL_FILE_NAME returned %s\n", nt_errstr(status)));
2571 if (NT_STATUS_IS_OK(status)) {
2572 TALLOC_FREE(conv_fname);
2573 return NT_STATUS_OK;
2575 if (!NT_STATUS_EQUAL(status, NT_STATUS_NOT_SUPPORTED)) {
2576 TALLOC_FREE(conv_fname);
2578 return NT_STATUS_NOT_SUPPORTED;
2581 status = get_real_filename_full_scan_at(
2582 conv_fname->fsp, name, false, mem_ctx, found_name);
2583 TALLOC_FREE(conv_fname);
2584 if (!NT_STATUS_IS_OK(status)) {
2585 DBG_DEBUG("Scan [%s] for [%s] failed\n",
2590 DBG_DEBUG("Scan [%s] for [%s] returned [%s]\n",
2591 conv, name, *found_name);
2594 return NT_STATUS_OK;
2597 static const char *shadow_copy2_connectpath(struct vfs_handle_struct *handle,
2598 const struct smb_filename *smb_fname_in)
2600 time_t timestamp = 0;
2601 char *stripped = NULL;
2603 const char *fname = smb_fname_in->base_name;
2604 struct smb_filename smb_fname = {0};
2605 struct smb_filename *result_fname = NULL;
2606 char *result = NULL;
2607 char *parent_dir = NULL;
2608 int saved_errno = 0;
2609 size_t rootpath_len = 0;
2610 struct shadow_copy2_private *priv = NULL;
2612 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
2615 DBG_DEBUG("Calc connect path for [%s]\n", fname);
2617 if (priv->shadow_connectpath != NULL) {
2618 DBG_DEBUG("cached connect path is [%s]\n",
2619 priv->shadow_connectpath);
2620 return priv->shadow_connectpath;
2623 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, smb_fname_in,
2624 ×tamp, &stripped)) {
2627 if (timestamp == 0) {
2628 return SMB_VFS_NEXT_CONNECTPATH(handle, smb_fname_in);
2631 tmp = shadow_copy2_do_convert(talloc_tos(), handle, stripped, timestamp,
2634 if (errno != ENOENT) {
2639 * If the converted path does not exist, and converting
2640 * the parent yields something that does exist, then
2641 * this path refers to something that has not been
2642 * created yet, relative to the parent path.
2643 * The snapshot finding is relative to the parent.
2644 * (usually snapshots are read/only but this is not
2645 * necessarily true).
2646 * This code also covers getting a wildcard in the
2647 * last component, because this function is called
2648 * prior to sanitizing the path, and in SMB1 we may
2649 * get wildcards in path names.
2651 if (!parent_dirname(talloc_tos(), stripped, &parent_dir,
2657 tmp = shadow_copy2_do_convert(talloc_tos(), handle, parent_dir,
2658 timestamp, &rootpath_len);
2664 DBG_DEBUG("converted path is [%s] root path is [%.*s]\n", tmp,
2665 (int)rootpath_len, tmp);
2667 tmp[rootpath_len] = '\0';
2668 smb_fname = (struct smb_filename) { .base_name = tmp };
2670 result_fname = SMB_VFS_NEXT_REALPATH(handle, priv, &smb_fname);
2671 if (result_fname == NULL) {
2676 * SMB_VFS_NEXT_REALPATH returns a talloc'ed string.
2677 * Don't leak memory.
2679 TALLOC_FREE(priv->shadow_realpath);
2680 priv->shadow_realpath = result_fname;
2681 result = priv->shadow_realpath->base_name;
2683 DBG_DEBUG("connect path is [%s]\n", result);
2686 if (result == NULL) {
2687 saved_errno = errno;
2690 TALLOC_FREE(stripped);
2691 TALLOC_FREE(parent_dir);
2692 if (saved_errno != 0) {
2693 errno = saved_errno;
2698 static NTSTATUS shadow_copy2_parent_pathname(vfs_handle_struct *handle,
2700 const struct smb_filename *smb_fname_in,
2701 struct smb_filename **parent_dir_out,
2702 struct smb_filename **atname_out)
2704 time_t timestamp = 0;
2705 char *stripped = NULL;
2706 char *converted_name = NULL;
2707 struct smb_filename *smb_fname = NULL;
2708 struct smb_filename *parent = NULL;
2709 struct smb_filename *atname = NULL;
2710 struct shadow_copy2_private *priv = NULL;
2712 bool is_converted = false;
2713 NTSTATUS status = NT_STATUS_OK;
2714 TALLOC_CTX *frame = NULL;
2716 SMB_VFS_HANDLE_GET_DATA(handle,
2718 struct shadow_copy2_private,
2719 return NT_STATUS_INTERNAL_ERROR);
2721 frame = talloc_stackframe();
2723 smb_fname = cp_smb_filename(frame, smb_fname_in);
2724 if (smb_fname == NULL) {
2725 status = NT_STATUS_NO_MEMORY;
2729 /* First, call the default PARENT_PATHNAME. */
2730 status = SMB_VFS_NEXT_PARENT_PATHNAME(handle,
2735 if (!NT_STATUS_IS_OK(status)) {
2739 if (parent->twrp == 0) {
2741 * Parent is not a snapshot path, return
2742 * the regular result.
2744 status = NT_STATUS_OK;
2748 /* See if we can find a snapshot for the parent. */
2749 ok = shadow_copy2_strip_snapshot_converted(frame,
2756 status = map_nt_error_from_unix(errno);
2762 * Already found snapshot for parent so wipe
2769 converted_name = shadow_copy2_convert(frame,
2774 if (converted_name == NULL) {
2776 * Can't find snapshot for parent so wipe
2784 *parent_dir_out = talloc_move(ctx, &parent);
2785 if (atname_out != NULL) {
2786 *atname_out = talloc_move(*parent_dir_out, &atname);
2795 static uint64_t shadow_copy2_disk_free(vfs_handle_struct *handle,
2796 const struct smb_filename *smb_fname,
2801 time_t timestamp = 0;
2802 char *stripped = NULL;
2803 int saved_errno = 0;
2805 struct smb_filename *conv_smb_fname = NULL;
2806 uint64_t ret = (uint64_t)-1;
2808 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2813 return (uint64_t)-1;
2815 if (timestamp == 0) {
2816 return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname,
2817 bsize, dfree, dsize);
2819 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2820 TALLOC_FREE(stripped);
2822 return (uint64_t)-1;
2824 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2830 if (conv_smb_fname == NULL) {
2832 return (uint64_t)-1;
2834 ret = SMB_VFS_NEXT_DISK_FREE(handle, conv_smb_fname,
2835 bsize, dfree, dsize);
2836 if (ret == (uint64_t)-1) {
2837 saved_errno = errno;
2840 TALLOC_FREE(conv_smb_fname);
2841 if (saved_errno != 0) {
2842 errno = saved_errno;
2847 static int shadow_copy2_get_quota(vfs_handle_struct *handle,
2848 const struct smb_filename *smb_fname,
2849 enum SMB_QUOTA_TYPE qtype,
2853 time_t timestamp = 0;
2854 char *stripped = NULL;
2856 int saved_errno = 0;
2858 struct smb_filename *conv_smb_fname = NULL;
2860 if (!shadow_copy2_strip_snapshot(talloc_tos(),
2867 if (timestamp == 0) {
2868 return SMB_VFS_NEXT_GET_QUOTA(handle, smb_fname, qtype, id, dq);
2871 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
2872 TALLOC_FREE(stripped);
2876 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2882 if (conv_smb_fname == NULL) {
2886 ret = SMB_VFS_NEXT_GET_QUOTA(handle, conv_smb_fname, qtype, id, dq);
2889 saved_errno = errno;
2892 TALLOC_FREE(conv_smb_fname);
2893 if (saved_errno != 0) {
2894 errno = saved_errno;
2900 static ssize_t shadow_copy2_pwrite(vfs_handle_struct *handle,
2908 nwritten = SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
2909 if (nwritten == -1) {
2910 if (errno == EBADF && fsp->fsp_flags.can_write) {
2918 struct shadow_copy2_pwrite_state {
2919 vfs_handle_struct *handle;
2922 struct vfs_aio_state vfs_aio_state;
2925 static void shadow_copy2_pwrite_done(struct tevent_req *subreq);
2927 static struct tevent_req *shadow_copy2_pwrite_send(
2928 struct vfs_handle_struct *handle, TALLOC_CTX *mem_ctx,
2929 struct tevent_context *ev, struct files_struct *fsp,
2930 const void *data, size_t n, off_t offset)
2932 struct tevent_req *req = NULL, *subreq = NULL;
2933 struct shadow_copy2_pwrite_state *state = NULL;
2935 req = tevent_req_create(mem_ctx, &state,
2936 struct shadow_copy2_pwrite_state);
2940 state->handle = handle;
2943 subreq = SMB_VFS_NEXT_PWRITE_SEND(state,
2950 if (tevent_req_nomem(subreq, req)) {
2951 return tevent_req_post(req, ev);
2953 tevent_req_set_callback(subreq, shadow_copy2_pwrite_done, req);
2958 static void shadow_copy2_pwrite_done(struct tevent_req *subreq)
2960 struct tevent_req *req = tevent_req_callback_data(
2961 subreq, struct tevent_req);
2962 struct shadow_copy2_pwrite_state *state = tevent_req_data(
2963 req, struct shadow_copy2_pwrite_state);
2965 state->ret = SMB_VFS_PWRITE_RECV(subreq, &state->vfs_aio_state);
2966 TALLOC_FREE(subreq);
2967 if (state->ret == -1) {
2968 tevent_req_error(req, state->vfs_aio_state.error);
2972 tevent_req_done(req);
2975 static ssize_t shadow_copy2_pwrite_recv(struct tevent_req *req,
2976 struct vfs_aio_state *vfs_aio_state)
2978 struct shadow_copy2_pwrite_state *state = tevent_req_data(
2979 req, struct shadow_copy2_pwrite_state);
2981 if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
2982 if ((vfs_aio_state->error == EBADF) &&
2983 state->fsp->fsp_flags.can_write)
2985 vfs_aio_state->error = EROFS;
2991 *vfs_aio_state = state->vfs_aio_state;
2995 static int shadow_copy2_connect(struct vfs_handle_struct *handle,
2996 const char *service, const char *user)
2998 struct shadow_copy2_config *config;
2999 struct shadow_copy2_private *priv;
3001 const char *snapdir;
3002 const char *snapprefix = NULL;
3003 const char *delimiter;
3004 const char *gmt_format;
3005 const char *sort_order;
3006 const char *basedir = NULL;
3007 const char *snapsharepath = NULL;
3008 const char *mount_point;
3010 DEBUG(10, (__location__ ": cnum[%u], connectpath[%s]\n",
3011 (unsigned)handle->conn->cnum,
3012 handle->conn->connectpath));
3014 ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
3019 priv = talloc_zero(handle->conn, struct shadow_copy2_private);
3021 DBG_ERR("talloc_zero() failed\n");
3026 priv->snaps = talloc_zero(priv, struct shadow_copy2_snaplist_info);
3027 if (priv->snaps == NULL) {
3028 DBG_ERR("talloc_zero() failed\n");
3033 config = talloc_zero(priv, struct shadow_copy2_config);
3034 if (config == NULL) {
3035 DEBUG(0, ("talloc_zero() failed\n"));
3040 priv->config = config;
3042 gmt_format = lp_parm_const_string(SNUM(handle->conn),
3045 config->gmt_format = talloc_strdup(config, gmt_format);
3046 if (config->gmt_format == NULL) {
3047 DEBUG(0, ("talloc_strdup() failed\n"));
3052 /* config->gmt_format must not contain a path separator. */
3053 if (strchr(config->gmt_format, '/') != NULL) {
3054 DEBUG(0, ("shadow:format %s must not contain a /"
3055 "character. Unable to initialize module.\n",
3056 config->gmt_format));
3061 config->use_sscanf = lp_parm_bool(SNUM(handle->conn),
3062 "shadow", "sscanf", false);
3064 config->use_localtime = lp_parm_bool(SNUM(handle->conn),
3065 "shadow", "localtime",
3068 snapdir = lp_parm_const_string(SNUM(handle->conn),
3069 "shadow", "snapdir",
3071 config->snapdir = talloc_strdup(config, snapdir);
3072 if (config->snapdir == NULL) {
3073 DEBUG(0, ("talloc_strdup() failed\n"));
3078 snapprefix = lp_parm_const_string(SNUM(handle->conn),
3079 "shadow", "snapprefix",
3081 if (snapprefix != NULL) {
3082 priv->snaps->regex = talloc_zero(priv->snaps, regex_t);
3083 if (priv->snaps->regex == NULL) {
3084 DBG_ERR("talloc_zero() failed\n");
3089 /* pre-compute regex rule for matching pattern later */
3090 ret = regcomp(priv->snaps->regex, snapprefix, 0);
3092 DBG_ERR("Failed to create regex object\n");
3097 delimiter = lp_parm_const_string(SNUM(handle->conn),
3098 "shadow", "delimiter",
3100 if (delimiter != NULL) {
3101 priv->config->delimiter = talloc_strdup(priv->config, delimiter);
3102 if (priv->config->delimiter == NULL) {
3103 DBG_ERR("talloc_strdup() failed\n");
3109 config->snapdirseverywhere = lp_parm_bool(SNUM(handle->conn),
3111 "snapdirseverywhere",
3114 config->crossmountpoints = lp_parm_bool(SNUM(handle->conn),
3115 "shadow", "crossmountpoints",
3118 if (config->crossmountpoints && !config->snapdirseverywhere) {
3119 DBG_WARNING("Warning: 'crossmountpoints' depends on "
3120 "'snapdirseverywhere'. Disabling crossmountpoints.\n");
3123 config->fixinodes = lp_parm_bool(SNUM(handle->conn),
3124 "shadow", "fixinodes",
3127 sort_order = lp_parm_const_string(SNUM(handle->conn),
3128 "shadow", "sort", "desc");
3129 config->sort_order = talloc_strdup(config, sort_order);
3130 if (config->sort_order == NULL) {
3131 DEBUG(0, ("talloc_strdup() failed\n"));
3136 mount_point = lp_parm_const_string(SNUM(handle->conn),
3137 "shadow", "mountpoint", NULL);
3138 if (mount_point != NULL) {
3139 if (mount_point[0] != '/') {
3140 DEBUG(1, (__location__ " Warning: 'mountpoint' is "
3141 "relative ('%s'), but it has to be an "
3142 "absolute path. Ignoring provided value.\n",
3147 p = strstr(handle->conn->connectpath, mount_point);
3148 if (p != handle->conn->connectpath) {
3149 DBG_WARNING("Warning: the share root (%s) is "
3150 "not a subdirectory of the "
3151 "specified mountpoint (%s). "
3152 "Ignoring provided value.\n",
3153 handle->conn->connectpath,
3160 if (mount_point != NULL) {
3161 config->mount_point = talloc_strdup(config, mount_point);
3162 if (config->mount_point == NULL) {
3163 DEBUG(0, (__location__ " talloc_strdup() failed\n"));
3167 config->mount_point = shadow_copy2_find_mount_point(config,
3169 if (config->mount_point == NULL) {
3170 DBG_WARNING("shadow_copy2_find_mount_point "
3171 "of the share root '%s' failed: %s\n",
3172 handle->conn->connectpath, strerror(errno));
3177 basedir = lp_parm_const_string(SNUM(handle->conn),
3178 "shadow", "basedir", NULL);
3180 if (basedir != NULL) {
3181 if (basedir[0] != '/') {
3182 DEBUG(1, (__location__ " Warning: 'basedir' is "
3183 "relative ('%s'), but it has to be an "
3184 "absolute path. Disabling basedir.\n",
3189 p = strstr(basedir, config->mount_point);
3191 DEBUG(1, ("Warning: basedir (%s) is not a "
3192 "subdirectory of the share root's "
3193 "mount point (%s). "
3194 "Disabling basedir\n",
3195 basedir, config->mount_point));
3201 if (config->snapdirseverywhere && basedir != NULL) {
3202 DEBUG(1, (__location__ " Warning: 'basedir' is incompatible "
3203 "with 'snapdirseverywhere'. Disabling basedir.\n"));
3207 snapsharepath = lp_parm_const_string(SNUM(handle->conn), "shadow",
3208 "snapsharepath", NULL);
3209 if (snapsharepath != NULL) {
3210 if (snapsharepath[0] == '/') {
3211 DBG_WARNING("Warning: 'snapsharepath' is "
3212 "absolute ('%s'), but it has to be a "
3213 "relative path. Disabling snapsharepath.\n",
3215 snapsharepath = NULL;
3217 if (config->snapdirseverywhere && snapsharepath != NULL) {
3218 DBG_WARNING("Warning: 'snapsharepath' is incompatible "
3219 "with 'snapdirseverywhere'. Disabling "
3220 "snapsharepath.\n");
3221 snapsharepath = NULL;
3225 if (basedir != NULL && snapsharepath != NULL) {
3226 DBG_WARNING("Warning: 'snapsharepath' is incompatible with "
3227 "'basedir'. Disabling snapsharepath\n");
3228 snapsharepath = NULL;
3231 if (snapsharepath != NULL) {
3232 config->rel_connectpath = talloc_strdup(config, snapsharepath);
3233 if (config->rel_connectpath == NULL) {
3234 DBG_ERR("talloc_strdup() failed\n");
3240 if (basedir == NULL) {
3241 basedir = config->mount_point;
3244 if (config->rel_connectpath == NULL &&
3245 strlen(basedir) < strlen(handle->conn->connectpath)) {
3246 config->rel_connectpath = talloc_strdup(config,
3247 handle->conn->connectpath + strlen(basedir));
3248 if (config->rel_connectpath == NULL) {
3249 DEBUG(0, ("talloc_strdup() failed\n"));
3255 if (config->snapdir[0] == '/') {
3256 config->snapdir_absolute = true;
3258 if (config->snapdirseverywhere == true) {
3259 DEBUG(1, (__location__ " Warning: An absolute snapdir "
3260 "is incompatible with 'snapdirseverywhere', "
3261 "setting 'snapdirseverywhere' to false.\n"));
3262 config->snapdirseverywhere = false;
3265 if (config->crossmountpoints == true) {
3266 DEBUG(1, (__location__ " Warning: 'crossmountpoints' "
3267 "is not supported with an absolute snapdir. "
3268 "Disabling it.\n"));
3269 config->crossmountpoints = false;
3272 config->snapshot_basepath = config->snapdir;
3274 config->snapshot_basepath = talloc_asprintf(config, "%s/%s",
3275 config->mount_point, config->snapdir);
3276 if (config->snapshot_basepath == NULL) {
3277 DEBUG(0, ("talloc_asprintf() failed\n"));
3283 trim_string(config->mount_point, NULL, "/");
3284 trim_string(config->rel_connectpath, "/", "/");
3285 trim_string(config->snapdir, NULL, "/");
3286 trim_string(config->snapshot_basepath, NULL, "/");
3288 DEBUG(10, ("shadow_copy2_connect: configuration:\n"
3289 " share root: '%s'\n"
3290 " mountpoint: '%s'\n"
3291 " rel share root: '%s'\n"
3293 " snapprefix: '%s'\n"
3294 " delimiter: '%s'\n"
3295 " snapshot base path: '%s'\n"
3298 " snapdirs everywhere: %s\n"
3299 " cross mountpoints: %s\n"
3303 handle->conn->connectpath,
3304 config->mount_point,
3305 config->rel_connectpath,
3309 config->snapshot_basepath,
3311 config->use_sscanf ? "yes" : "no",
3312 config->snapdirseverywhere ? "yes" : "no",
3313 config->crossmountpoints ? "yes" : "no",
3314 config->fixinodes ? "yes" : "no",
3319 SMB_VFS_HANDLE_SET_DATA(handle, priv,
3320 NULL, struct shadow_copy2_private,
3326 static struct dirent *shadow_copy2_readdir(vfs_handle_struct *handle,
3327 struct files_struct *dirfsp,
3329 SMB_STRUCT_STAT *sbuf)
3331 struct shadow_copy2_private *priv = NULL;
3332 struct dirent *ent = NULL;
3333 struct smb_filename atname;
3334 struct smb_filename *full_fname = NULL;
3335 time_t timestamp = 0;
3336 char *stripped = NULL;
3338 char *abspath = NULL;
3339 bool converted = false;
3341 SMB_VFS_HANDLE_GET_DATA(handle, priv, struct shadow_copy2_private,
3344 ent = SMB_VFS_NEXT_READDIR(handle, dirfsp, dirp, sbuf);
3351 if (ISDOT(dirfsp->fsp_name->base_name) && ISDOTDOT(ent->d_name)) {
3355 atname = (struct smb_filename) {
3356 .base_name = ent->d_name,
3357 .twrp = dirfsp->fsp_name->twrp,
3358 .flags = dirfsp->fsp_name->flags,
3361 full_fname = full_path_from_dirfsp_atname(talloc_tos(),
3364 if (full_fname == NULL) {
3368 if (!shadow_copy2_strip_snapshot_converted(talloc_tos(),
3374 TALLOC_FREE(full_fname);
3378 if (timestamp == 0 && !converted) {
3379 /* Not a snapshot path, no need for convert_sbuf() */
3380 TALLOC_FREE(stripped);
3381 TALLOC_FREE(full_fname);
3385 if (timestamp == 0) {
3386 abspath = make_path_absolute(talloc_tos(),
3388 full_fname->base_name);
3389 TALLOC_FREE(full_fname);
3390 if (abspath == NULL) {
3394 conv = shadow_copy2_convert(talloc_tos(),
3398 TALLOC_FREE(stripped);
3403 abspath = make_path_absolute(talloc_tos(), priv, conv);
3405 if (abspath == NULL) {
3410 convert_sbuf(handle, abspath, sbuf);
3412 TALLOC_FREE(abspath);
3416 static struct vfs_fn_pointers vfs_shadow_copy2_fns = {
3417 .connect_fn = shadow_copy2_connect,
3418 .disk_free_fn = shadow_copy2_disk_free,
3419 .get_quota_fn = shadow_copy2_get_quota,
3420 .create_dfs_pathat_fn = shadow_copy2_create_dfs_pathat,
3421 .read_dfs_pathat_fn = shadow_copy2_read_dfs_pathat,
3422 .renameat_fn = shadow_copy2_renameat,
3423 .linkat_fn = shadow_copy2_linkat,
3424 .symlinkat_fn = shadow_copy2_symlinkat,
3425 .stat_fn = shadow_copy2_stat,
3426 .lstat_fn = shadow_copy2_lstat,
3427 .fstat_fn = shadow_copy2_fstat,
3428 .fstatat_fn = shadow_copy2_fstatat,
3429 .openat_fn = shadow_copy2_openat,
3430 .unlinkat_fn = shadow_copy2_unlinkat,
3431 .fchmod_fn = shadow_copy2_fchmod,
3432 .chdir_fn = shadow_copy2_chdir,
3433 .fntimes_fn = shadow_copy2_fntimes,
3434 .readlinkat_fn = shadow_copy2_readlinkat,
3435 .mknodat_fn = shadow_copy2_mknodat,
3436 .realpath_fn = shadow_copy2_realpath,
3437 .get_shadow_copy_data_fn = shadow_copy2_get_shadow_copy_data,
3438 .mkdirat_fn = shadow_copy2_mkdirat,
3439 .fsetxattr_fn = shadow_copy2_fsetxattr,
3440 .fchflags_fn = shadow_copy2_fchflags,
3441 .get_real_filename_at_fn = shadow_copy2_get_real_filename_at,
3442 .pwrite_fn = shadow_copy2_pwrite,
3443 .pwrite_send_fn = shadow_copy2_pwrite_send,
3444 .pwrite_recv_fn = shadow_copy2_pwrite_recv,
3445 .connectpath_fn = shadow_copy2_connectpath,
3446 .parent_pathname_fn = shadow_copy2_parent_pathname,
3447 .readdir_fn = shadow_copy2_readdir,
3451 NTSTATUS vfs_shadow_copy2_init(TALLOC_CTX *ctx)
3453 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
3454 "shadow_copy2", &vfs_shadow_copy2_fns);