2 * Third attempt at a shadow copy module
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
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 This is a 3rd implemetation of a shadow copy module for exposing
27 snapshots to windows clients as shadow copies. This version has the
30 1) you don't need to populate your shares with symlinks to the
31 snapshots. This can be very important when you have thousands of
32 shares, or use [homes]
34 2) the inode number of the files is altered so it is different
35 from the original. This allows the 'restore' button to work
36 without a sharing violation
38 3) shadow copy results can be sorted before being sent to the
39 client. This is beneficial for filesystems that don't read
40 directories alphabetically (the default unix).
42 4) vanity naming for snapshots. Snapshots can be named in any
43 format compatible with str[fp]time conversions.
45 5) time stamps in snapshot names can be represented in localtime
50 shadow:snapdir = <directory where snapshots are kept>
52 This is the directory containing the @GMT-* snapshot directories. If it is an absolute
53 path it is used as-is. If it is a relative path, then it is taken relative to the mount
54 point of the filesystem that the root of this share is on
56 shadow:basedir = <base directory that snapshots are from>
58 This is an optional parameter that specifies the directory that
59 the snapshots are relative to. It defaults to the filesystem
62 shadow:fixinodes = yes/no
64 If you enable shadow:fixinodes then this module will modify the
65 apparent inode number of files in the snapshot directories using
66 a hash of the files path. This is needed for snapshot systems
67 where the snapshots have the same device:inode number as the
68 original files (such as happens with GPFS snapshots). If you
69 don't set this option then the 'restore' button in the shadow
70 copy UI will fail with a sharing violation.
72 shadow:sort = asc/desc, or not specified for unsorted (default)
74 This is an optional parameter that specifies that the shadow
75 copy directories should be sorted before sending them to the
76 client. This can be beneficial as unix filesystems are usually
77 not listed alphabetically sorted. If enabled, you typically
78 want to specify descending order.
80 shadow:format = <format specification for snapshot names>
82 This is an optional parameter that specifies the format
83 specification for the naming of snapshots. The format must
84 be compatible with the conversion specifications recognized
85 by str[fp]time. The default value is "@GMT-%Y.%m.%d-%H.%M.%S".
87 shadow:sscanf = yes/no (default is no)
89 The time is the unsigned long integer (%lu) in the format string
90 rather than a time strptime() can parse. The result must be a unix time_t
93 shadow:localtime = yes/no (default is no)
95 This is an optional parameter that indicates whether the
96 snapshot names are in UTC/GMT or the local time.
99 The following command would generate a correctly formatted directory name
100 for use with the default parameters:
101 date -u +@GMT-%Y.%m.%d-%H.%M.%S
104 #include "includes.h"
105 #include "system/filesys.h"
106 #include "include/ntioctl.h"
107 #include <ccan/hash/hash.h>
108 #include "util_tdb.h"
110 static bool shadow_copy2_find_slashes(TALLOC_CTX *mem_ctx, const char *str,
112 unsigned *pnum_offsets)
114 unsigned num_offsets;
121 while ((p = strchr(p, '/')) != NULL) {
126 offsets = talloc_array(mem_ctx, size_t, num_offsets);
127 if (offsets == NULL) {
133 while ((p = strchr(p, '/')) != NULL) {
134 offsets[num_offsets] = p-str;
140 *pnum_offsets = num_offsets;
144 static char *shadow_copy2_insert_string(TALLOC_CTX *mem_ctx,
145 struct vfs_handle_struct *handle,
150 fstring snaptime_string;
153 fmt = lp_parm_const_string(SNUM(handle->conn), "shadow",
154 "format", GMT_FORMAT);
156 if (lp_parm_bool(SNUM(handle->conn), "shadow", "sscanf", false)) {
157 snaptime_len = snprintf(snaptime_string, sizeof(snaptime_string), fmt,
158 (unsigned long)snapshot);
159 if (snaptime_len <= 0) {
160 DEBUG(10, ("snprintf failed\n"));
164 if (lp_parm_bool(SNUM(handle->conn), "shadow", "localtime", false)) {
165 if (localtime_r(&snapshot, &snap_tm) == 0) {
166 DEBUG(10, ("gmtime_r failed\n"));
170 if (gmtime_r(&snapshot, &snap_tm) == 0) {
171 DEBUG(10, ("gmtime_r failed\n"));
175 snaptime_len = strftime(snaptime_string, sizeof(snaptime_string), fmt,
177 if (snaptime_len == 0) {
178 DEBUG(10, ("strftime failed\n"));
182 return talloc_asprintf(mem_ctx, "/%s/%s",
183 lp_parm_const_string(
184 SNUM(handle->conn), "shadow", "snapdir",
189 static bool shadow_copy2_strip_snapshot(TALLOC_CTX *mem_ctx,
190 struct vfs_handle_struct *handle,
200 size_t rest_len, dst_len;
202 p = strstr_m(name, "@GMT-");
206 if ((p > name) && (p[-1] != '/')) {
209 q = strptime(p, GMT_FORMAT, &tm);
214 timestamp = timegm(&tm);
215 if (timestamp == (time_t)-1) {
218 if ((p == name) && (q[0] == '\0')) {
219 if (pstripped != NULL) {
220 stripped = talloc_strdup(mem_ctx, "");
221 if (stripped == NULL) {
224 *pstripped = stripped;
226 *ptimestamp = timestamp;
234 rest_len = strlen(q);
235 dst_len = (p-name) + rest_len;
237 if (lp_parm_bool(SNUM(handle->conn), "shadow", "snapdirseverywhere",
241 insert = shadow_copy2_insert_string(talloc_tos(), handle,
243 if (insert == NULL) {
248 have_insert = (strstr(name, insert+1) != NULL);
255 if (pstripped != NULL) {
256 stripped = talloc_array(mem_ctx, char, dst_len+1);
257 if (stripped == NULL) {
262 memcpy(stripped, name, p-name);
265 memcpy(stripped + (p-name), q, rest_len);
267 stripped[dst_len] = '\0';
268 *pstripped = stripped;
270 *ptimestamp = timestamp;
277 static char *shadow_copy2_find_mount_point(TALLOC_CTX *mem_ctx,
278 vfs_handle_struct *handle)
280 char *path = talloc_strdup(mem_ctx, handle->conn->connectpath);
285 if (stat(path, &st) != 0) {
292 while ((p = strrchr(path, '/')) && p > path) {
294 if (stat(path, &st) != 0) {
298 if (st.st_dev != dev) {
307 static char *shadow_copy2_convert(TALLOC_CTX *mem_ctx,
308 struct vfs_handle_struct *handle,
309 const char *name, time_t timestamp)
311 struct smb_filename converted_fname;
313 size_t *slashes = NULL;
314 unsigned num_slashes;
318 char *converted = NULL;
323 path = talloc_asprintf(mem_ctx, "%s/%s", handle->conn->connectpath,
329 pathlen = talloc_get_size(path)-1;
331 DEBUG(10, ("converting %s\n", path));
333 if (!shadow_copy2_find_slashes(talloc_tos(), path,
334 &slashes, &num_slashes)) {
337 insert = shadow_copy2_insert_string(talloc_tos(), handle, timestamp);
338 if (insert == NULL) {
341 insertlen = talloc_get_size(insert)-1;
342 converted = talloc_array(mem_ctx, char, pathlen + insertlen + 1);
343 if (converted == NULL) {
347 if (path[pathlen-1] != '/') {
349 * Append a fake slash to find the snapshot root
352 tmp = talloc_realloc(talloc_tos(), slashes,
353 size_t, num_slashes+1);
358 slashes[num_slashes] = pathlen;
364 if (!lp_parm_bool(SNUM(handle->conn), "shadow", "crossmountpoints",
368 mount_point = shadow_copy2_find_mount_point(talloc_tos(),
370 if (mount_point == NULL) {
373 min_offset = strlen(mount_point);
374 TALLOC_FREE(mount_point);
377 memcpy(converted, path, pathlen+1);
378 converted[pathlen+insertlen] = '\0';
380 ZERO_STRUCT(converted_fname);
381 converted_fname.base_name = converted;
383 for (i = num_slashes-1; i>=0; i--) {
389 if (offset < min_offset) {
394 memcpy(converted+offset, insert, insertlen);
397 memcpy(converted+offset, path + slashes[i],
398 pathlen - slashes[i]);
400 ret = SMB_VFS_NEXT_LSTAT(handle, &converted_fname);
402 DEBUG(10, ("Trying %s: %d (%s)\n", converted,
403 ret, ret == 0 ? "ok" : strerror(errno)));
408 if (errno == ENOTDIR) {
410 * This is a valid condition: We appended the
411 * .snaphots/@GMT.. to a file name. Just try
412 * with the upper levels.
416 if (errno != ENOENT) {
417 /* Other problem than "not found" */
426 DEBUG(10, ("Found %s\n", converted));
434 TALLOC_FREE(converted);
436 TALLOC_FREE(slashes);
443 modify a sbuf return to ensure that inodes in the shadow directory
444 are different from those in the main directory
446 static void convert_sbuf(vfs_handle_struct *handle, const char *fname,
447 SMB_STRUCT_STAT *sbuf)
449 if (lp_parm_bool(SNUM(handle->conn), "shadow", "fixinodes", False)) {
450 /* some snapshot systems, like GPFS, return the name
451 device:inode for the snapshot files as the current
452 files. That breaks the 'restore' button in the shadow copy
453 GUI, as the client gets a sharing violation.
455 This is a crude way of allowing both files to be
456 open at once. It has a slight chance of inode
457 number collision, but I can't see a better approach
458 without significant VFS changes
462 shash = hash(fname, strlen(fname), 0) & 0xFF000000;
466 sbuf->st_ex_ino ^= shash;
470 static DIR *shadow_copy2_opendir(vfs_handle_struct *handle,
481 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
482 ×tamp, &stripped)) {
485 if (timestamp == 0) {
486 return SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
488 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
489 TALLOC_FREE(stripped);
493 ret = SMB_VFS_NEXT_OPENDIR(handle, conv, mask, attr);
500 static int shadow_copy2_rename(vfs_handle_struct *handle,
501 const struct smb_filename *smb_fname_src,
502 const struct smb_filename *smb_fname_dst)
504 time_t timestamp_src, timestamp_dst;
506 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
507 smb_fname_src->base_name,
508 ×tamp_src, NULL)) {
511 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
512 smb_fname_dst->base_name,
513 ×tamp_dst, NULL)) {
516 if (timestamp_src != 0) {
520 if (timestamp_dst != 0) {
524 return SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
527 static int shadow_copy2_symlink(vfs_handle_struct *handle,
528 const char *oldname, const char *newname)
530 time_t timestamp_old, timestamp_new;
532 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, oldname,
533 ×tamp_old, NULL)) {
536 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, newname,
537 ×tamp_new, NULL)) {
540 if ((timestamp_old != 0) || (timestamp_new != 0)) {
544 return SMB_VFS_NEXT_SYMLINK(handle, oldname, newname);
547 static int shadow_copy2_link(vfs_handle_struct *handle,
548 const char *oldname, const char *newname)
550 time_t timestamp_old, timestamp_new;
552 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, oldname,
553 ×tamp_old, NULL)) {
556 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, newname,
557 ×tamp_new, NULL)) {
560 if ((timestamp_old != 0) || (timestamp_new != 0)) {
564 return SMB_VFS_NEXT_LINK(handle, oldname, newname);
567 static int shadow_copy2_stat(vfs_handle_struct *handle,
568 struct smb_filename *smb_fname)
571 char *stripped, *tmp;
572 int ret, saved_errno;
574 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
575 smb_fname->base_name,
576 ×tamp, &stripped)) {
579 if (timestamp == 0) {
580 return SMB_VFS_NEXT_STAT(handle, smb_fname);
583 tmp = smb_fname->base_name;
584 smb_fname->base_name = shadow_copy2_convert(
585 talloc_tos(), handle, stripped, timestamp);
586 TALLOC_FREE(stripped);
588 if (smb_fname->base_name == NULL) {
589 smb_fname->base_name = tmp;
593 ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
596 TALLOC_FREE(smb_fname->base_name);
597 smb_fname->base_name = tmp;
600 convert_sbuf(handle, smb_fname->base_name, &smb_fname->st);
606 static int shadow_copy2_lstat(vfs_handle_struct *handle,
607 struct smb_filename *smb_fname)
610 char *stripped, *tmp;
611 int ret, saved_errno;
613 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
614 smb_fname->base_name,
615 ×tamp, &stripped)) {
618 if (timestamp == 0) {
619 return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
622 tmp = smb_fname->base_name;
623 smb_fname->base_name = shadow_copy2_convert(
624 talloc_tos(), handle, stripped, timestamp);
625 TALLOC_FREE(stripped);
627 if (smb_fname->base_name == NULL) {
628 smb_fname->base_name = tmp;
632 ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
635 TALLOC_FREE(smb_fname->base_name);
636 smb_fname->base_name = tmp;
639 convert_sbuf(handle, smb_fname->base_name, &smb_fname->st);
645 static int shadow_copy2_fstat(vfs_handle_struct *handle, files_struct *fsp,
646 SMB_STRUCT_STAT *sbuf)
651 ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
655 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
656 fsp->fsp_name->base_name,
660 if (timestamp != 0) {
661 convert_sbuf(handle, fsp->fsp_name->base_name, sbuf);
666 static int shadow_copy2_open(vfs_handle_struct *handle,
667 struct smb_filename *smb_fname, files_struct *fsp,
668 int flags, mode_t mode)
671 char *stripped, *tmp;
672 int ret, saved_errno;
674 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
675 smb_fname->base_name,
676 ×tamp, &stripped)) {
679 if (timestamp == 0) {
680 return SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
683 tmp = smb_fname->base_name;
684 smb_fname->base_name = shadow_copy2_convert(
685 talloc_tos(), handle, stripped, timestamp);
686 TALLOC_FREE(stripped);
688 if (smb_fname->base_name == NULL) {
689 smb_fname->base_name = tmp;
693 ret = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
696 TALLOC_FREE(smb_fname->base_name);
697 smb_fname->base_name = tmp;
703 static int shadow_copy2_unlink(vfs_handle_struct *handle,
704 const struct smb_filename *smb_fname)
708 int ret, saved_errno;
709 struct smb_filename *conv;
711 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
712 smb_fname->base_name,
713 ×tamp, &stripped)) {
716 if (timestamp == 0) {
717 return SMB_VFS_NEXT_UNLINK(handle, smb_fname);
719 conv = cp_smb_filename(talloc_tos(), smb_fname);
724 conv->base_name = shadow_copy2_convert(
725 conv, handle, stripped, timestamp);
726 TALLOC_FREE(stripped);
727 if (conv->base_name == NULL) {
730 ret = SMB_VFS_NEXT_UNLINK(handle, conv);
737 static int shadow_copy2_chmod(vfs_handle_struct *handle, const char *fname,
742 int ret, saved_errno;
745 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
746 ×tamp, &stripped)) {
749 if (timestamp == 0) {
750 return SMB_VFS_NEXT_CHMOD(handle, fname, mode);
752 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
753 TALLOC_FREE(stripped);
757 ret = SMB_VFS_NEXT_CHMOD(handle, conv, mode);
764 static int shadow_copy2_chown(vfs_handle_struct *handle, const char *fname,
765 uid_t uid, gid_t gid)
769 int ret, saved_errno;
772 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
773 ×tamp, &stripped)) {
776 if (timestamp == 0) {
777 return SMB_VFS_NEXT_CHOWN(handle, fname, uid, gid);
779 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
780 TALLOC_FREE(stripped);
784 ret = SMB_VFS_NEXT_CHOWN(handle, conv, uid, gid);
791 static int shadow_copy2_chdir(vfs_handle_struct *handle,
796 int ret, saved_errno;
799 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
800 ×tamp, &stripped)) {
803 if (timestamp == 0) {
804 return SMB_VFS_NEXT_CHDIR(handle, fname);
806 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
807 TALLOC_FREE(stripped);
811 ret = SMB_VFS_NEXT_CHDIR(handle, conv);
818 static int shadow_copy2_ntimes(vfs_handle_struct *handle,
819 const struct smb_filename *smb_fname,
820 struct smb_file_time *ft)
824 int ret, saved_errno;
825 struct smb_filename *conv;
827 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
828 smb_fname->base_name,
829 ×tamp, &stripped)) {
832 if (timestamp == 0) {
833 return SMB_VFS_NEXT_NTIMES(handle, smb_fname, ft);
835 conv = cp_smb_filename(talloc_tos(), smb_fname);
840 conv->base_name = shadow_copy2_convert(
841 conv, handle, stripped, timestamp);
842 TALLOC_FREE(stripped);
843 if (conv->base_name == NULL) {
846 ret = SMB_VFS_NEXT_NTIMES(handle, conv, ft);
853 static int shadow_copy2_readlink(vfs_handle_struct *handle,
854 const char *fname, char *buf, size_t bufsiz)
858 int ret, saved_errno;
861 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
862 ×tamp, &stripped)) {
865 if (timestamp == 0) {
866 return SMB_VFS_NEXT_READLINK(handle, fname, buf, bufsiz);
868 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
869 TALLOC_FREE(stripped);
873 ret = SMB_VFS_NEXT_READLINK(handle, conv, buf, bufsiz);
880 static int shadow_copy2_mknod(vfs_handle_struct *handle,
881 const char *fname, mode_t mode, SMB_DEV_T dev)
885 int ret, saved_errno;
888 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
889 ×tamp, &stripped)) {
892 if (timestamp == 0) {
893 return SMB_VFS_NEXT_MKNOD(handle, fname, mode, dev);
895 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
896 TALLOC_FREE(stripped);
900 ret = SMB_VFS_NEXT_MKNOD(handle, conv, mode, dev);
907 static char *shadow_copy2_realpath(vfs_handle_struct *handle,
911 char *stripped = NULL;
914 char *inserted = NULL;
915 char *inserted_to, *inserted_end;
918 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
919 ×tamp, &stripped)) {
922 if (timestamp == 0) {
923 return SMB_VFS_NEXT_REALPATH(handle, fname);
926 tmp = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
931 result = SMB_VFS_NEXT_REALPATH(handle, tmp);
932 if (result == NULL) {
937 * Take away what we've inserted. This removes the @GMT-thingy
938 * completely, but will give a path under the share root.
940 inserted = shadow_copy2_insert_string(talloc_tos(), handle, timestamp);
941 if (inserted == NULL) {
944 inserted_to = strstr_m(result, inserted);
945 if (inserted_to == NULL) {
946 DEBUG(2, ("SMB_VFS_NEXT_REALPATH removed %s\n", inserted));
949 inserted_end = inserted_to + talloc_get_size(inserted) - 1;
950 memmove(inserted_to, inserted_end, strlen(inserted_end)+1);
954 TALLOC_FREE(inserted);
956 TALLOC_FREE(stripped);
961 static char *have_snapdir(struct vfs_handle_struct *handle,
964 struct smb_filename smb_fname;
967 ZERO_STRUCT(smb_fname);
968 smb_fname.base_name = talloc_asprintf(
969 talloc_tos(), "%s/%s", path,
970 lp_parm_const_string(SNUM(handle->conn), "shadow", "snapdir",
972 if (smb_fname.base_name == NULL) {
976 ret = SMB_VFS_NEXT_STAT(handle, &smb_fname);
977 if ((ret == 0) && (S_ISDIR(smb_fname.st.st_ex_mode))) {
978 return smb_fname.base_name;
980 TALLOC_FREE(smb_fname.base_name);
984 static char *shadow_copy2_find_snapdir(TALLOC_CTX *mem_ctx,
985 struct vfs_handle_struct *handle,
986 struct smb_filename *smb_fname)
991 path = talloc_asprintf(mem_ctx, "%s/%s",
992 handle->conn->connectpath,
993 smb_fname->base_name);
998 snapdir = have_snapdir(handle, path);
999 if (snapdir != NULL) {
1004 while ((p = strrchr(path, '/')) && (p > path)) {
1008 snapdir = have_snapdir(handle, path);
1009 if (snapdir != NULL) {
1018 static bool shadow_copy2_snapshot_to_gmt(vfs_handle_struct *handle,
1020 char *gmt, size_t gmt_len)
1022 struct tm timestamp;
1024 unsigned long int timestamp_long;
1027 fmt = lp_parm_const_string(SNUM(handle->conn), "shadow",
1028 "format", GMT_FORMAT);
1030 ZERO_STRUCT(timestamp);
1031 if (lp_parm_bool(SNUM(handle->conn), "shadow", "sscanf", false)) {
1032 if (sscanf(name, fmt, ×tamp_long) != 1) {
1033 DEBUG(10, ("shadow_copy2_snapshot_to_gmt: no sscanf match %s: %s\n",
1037 timestamp_t = timestamp_long;
1038 gmtime_r(×tamp_t, ×tamp);
1040 if (strptime(name, fmt, ×tamp) == NULL) {
1041 DEBUG(10, ("shadow_copy2_snapshot_to_gmt: no match %s: %s\n",
1045 DEBUG(10, ("shadow_copy2_snapshot_to_gmt: match %s: %s\n", fmt, name));
1047 if (lp_parm_bool(SNUM(handle->conn), "shadow", "localtime", false)) {
1048 timestamp.tm_isdst = -1;
1049 timestamp_t = mktime(×tamp);
1050 gmtime_r(×tamp_t, ×tamp);
1054 strftime(gmt, gmt_len, GMT_FORMAT, ×tamp);
1058 static int shadow_copy2_label_cmp_asc(const void *x, const void *y)
1060 return strncmp((const char *)x, (const char *)y, sizeof(SHADOW_COPY_LABEL));
1063 static int shadow_copy2_label_cmp_desc(const void *x, const void *y)
1065 return -strncmp((const char *)x, (const char *)y, sizeof(SHADOW_COPY_LABEL));
1069 sort the shadow copy data in ascending or descending order
1071 static void shadow_copy2_sort_data(vfs_handle_struct *handle,
1072 struct shadow_copy_data *shadow_copy2_data)
1074 int (*cmpfunc)(const void *, const void *);
1077 sort = lp_parm_const_string(SNUM(handle->conn), "shadow",
1083 if (strcmp(sort, "asc") == 0) {
1084 cmpfunc = shadow_copy2_label_cmp_asc;
1085 } else if (strcmp(sort, "desc") == 0) {
1086 cmpfunc = shadow_copy2_label_cmp_desc;
1091 if (shadow_copy2_data && shadow_copy2_data->num_volumes > 0 &&
1092 shadow_copy2_data->labels)
1094 TYPESAFE_QSORT(shadow_copy2_data->labels,
1095 shadow_copy2_data->num_volumes,
1100 static int shadow_copy2_get_shadow_copy_data(
1101 vfs_handle_struct *handle, files_struct *fsp,
1102 struct shadow_copy_data *shadow_copy2_data,
1106 const char *snapdir;
1108 TALLOC_CTX *tmp_ctx = talloc_stackframe();
1110 snapdir = shadow_copy2_find_snapdir(tmp_ctx, handle, fsp->fsp_name);
1111 if (snapdir == NULL) {
1112 DEBUG(0,("shadow:snapdir not found for %s in get_shadow_copy_data\n",
1113 handle->conn->connectpath));
1115 talloc_free(tmp_ctx);
1119 p = SMB_VFS_NEXT_OPENDIR(handle, snapdir, NULL, 0);
1122 DEBUG(2,("shadow_copy2: SMB_VFS_NEXT_OPENDIR() failed for '%s'"
1123 " - %s\n", snapdir, strerror(errno)));
1124 talloc_free(tmp_ctx);
1129 shadow_copy2_data->num_volumes = 0;
1130 shadow_copy2_data->labels = NULL;
1132 while ((d = SMB_VFS_NEXT_READDIR(handle, p, NULL))) {
1133 char snapshot[GMT_NAME_LEN+1];
1134 SHADOW_COPY_LABEL *tlabels;
1137 * ignore names not of the right form in the snapshot
1140 if (!shadow_copy2_snapshot_to_gmt(
1142 snapshot, sizeof(snapshot))) {
1144 DEBUG(6, ("shadow_copy2_get_shadow_copy_data: "
1145 "ignoring %s\n", d->d_name));
1148 DEBUG(6,("shadow_copy2_get_shadow_copy_data: %s -> %s\n",
1149 d->d_name, snapshot));
1152 /* the caller doesn't want the labels */
1153 shadow_copy2_data->num_volumes++;
1157 tlabels = talloc_realloc(shadow_copy2_data,
1158 shadow_copy2_data->labels,
1160 shadow_copy2_data->num_volumes+1);
1161 if (tlabels == NULL) {
1162 DEBUG(0,("shadow_copy2: out of memory\n"));
1163 SMB_VFS_NEXT_CLOSEDIR(handle, p);
1164 talloc_free(tmp_ctx);
1168 strlcpy(tlabels[shadow_copy2_data->num_volumes], snapshot,
1171 shadow_copy2_data->num_volumes++;
1172 shadow_copy2_data->labels = tlabels;
1175 SMB_VFS_NEXT_CLOSEDIR(handle,p);
1177 shadow_copy2_sort_data(handle, shadow_copy2_data);
1179 talloc_free(tmp_ctx);
1183 static NTSTATUS shadow_copy2_fget_nt_acl(vfs_handle_struct *handle,
1184 struct files_struct *fsp,
1185 uint32 security_info,
1186 TALLOC_CTX *mem_ctx,
1187 struct security_descriptor **ppdesc)
1194 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle,
1195 fsp->fsp_name->base_name,
1196 ×tamp, &stripped)) {
1197 return map_nt_error_from_unix(errno);
1199 if (timestamp == 0) {
1200 return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp, security_info,
1204 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1205 TALLOC_FREE(stripped);
1207 return map_nt_error_from_unix(errno);
1209 status = SMB_VFS_NEXT_GET_NT_ACL(handle, conv, security_info,
1215 static NTSTATUS shadow_copy2_get_nt_acl(vfs_handle_struct *handle,
1217 uint32 security_info,
1218 TALLOC_CTX *mem_ctx,
1219 struct security_descriptor **ppdesc)
1226 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1227 ×tamp, &stripped)) {
1228 return map_nt_error_from_unix(errno);
1230 if (timestamp == 0) {
1231 return SMB_VFS_NEXT_GET_NT_ACL(handle, fname, security_info,
1234 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1235 TALLOC_FREE(stripped);
1237 return map_nt_error_from_unix(errno);
1239 status = SMB_VFS_NEXT_GET_NT_ACL(handle, conv, security_info,
1245 static int shadow_copy2_mkdir(vfs_handle_struct *handle,
1246 const char *fname, mode_t mode)
1250 int ret, saved_errno;
1253 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1254 ×tamp, &stripped)) {
1257 if (timestamp == 0) {
1258 return SMB_VFS_NEXT_MKDIR(handle, fname, mode);
1260 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1261 TALLOC_FREE(stripped);
1265 ret = SMB_VFS_NEXT_MKDIR(handle, conv, mode);
1266 saved_errno = errno;
1268 errno = saved_errno;
1272 static int shadow_copy2_rmdir(vfs_handle_struct *handle, const char *fname)
1276 int ret, saved_errno;
1279 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1280 ×tamp, &stripped)) {
1283 if (timestamp == 0) {
1284 return SMB_VFS_NEXT_RMDIR(handle, fname);
1286 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1287 TALLOC_FREE(stripped);
1291 ret = SMB_VFS_NEXT_RMDIR(handle, conv);
1292 saved_errno = errno;
1294 errno = saved_errno;
1298 static int shadow_copy2_chflags(vfs_handle_struct *handle, const char *fname,
1303 int ret, saved_errno;
1306 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1307 ×tamp, &stripped)) {
1310 if (timestamp == 0) {
1311 return SMB_VFS_NEXT_CHFLAGS(handle, fname, flags);
1313 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1314 TALLOC_FREE(stripped);
1318 ret = SMB_VFS_NEXT_CHFLAGS(handle, conv, flags);
1319 saved_errno = errno;
1321 errno = saved_errno;
1325 static ssize_t shadow_copy2_getxattr(vfs_handle_struct *handle,
1326 const char *fname, const char *aname,
1327 void *value, size_t size)
1335 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1336 ×tamp, &stripped)) {
1339 if (timestamp == 0) {
1340 return SMB_VFS_NEXT_GETXATTR(handle, fname, aname, value,
1343 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1344 TALLOC_FREE(stripped);
1348 ret = SMB_VFS_NEXT_GETXATTR(handle, conv, aname, value, size);
1349 saved_errno = errno;
1351 errno = saved_errno;
1355 static ssize_t shadow_copy2_listxattr(struct vfs_handle_struct *handle,
1357 char *list, size_t size)
1365 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1366 ×tamp, &stripped)) {
1369 if (timestamp == 0) {
1370 return SMB_VFS_NEXT_LISTXATTR(handle, fname, list, size);
1372 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1373 TALLOC_FREE(stripped);
1377 ret = SMB_VFS_NEXT_LISTXATTR(handle, conv, list, size);
1378 saved_errno = errno;
1380 errno = saved_errno;
1384 static int shadow_copy2_removexattr(vfs_handle_struct *handle,
1385 const char *fname, const char *aname)
1389 int ret, saved_errno;
1392 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1393 ×tamp, &stripped)) {
1396 if (timestamp == 0) {
1397 return SMB_VFS_NEXT_REMOVEXATTR(handle, fname, aname);
1399 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1400 TALLOC_FREE(stripped);
1404 ret = SMB_VFS_NEXT_REMOVEXATTR(handle, conv, aname);
1405 saved_errno = errno;
1407 errno = saved_errno;
1411 static int shadow_copy2_setxattr(struct vfs_handle_struct *handle,
1413 const char *aname, const void *value,
1414 size_t size, int flags)
1422 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1423 ×tamp, &stripped)) {
1426 if (timestamp == 0) {
1427 return SMB_VFS_NEXT_SETXATTR(handle, fname, aname, value, size,
1430 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1431 TALLOC_FREE(stripped);
1435 ret = SMB_VFS_NEXT_SETXATTR(handle, conv, aname, value, size, flags);
1436 saved_errno = errno;
1438 errno = saved_errno;
1442 static int shadow_copy2_chmod_acl(vfs_handle_struct *handle,
1443 const char *fname, mode_t mode)
1451 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, fname,
1452 ×tamp, &stripped)) {
1455 if (timestamp == 0) {
1456 return SMB_VFS_NEXT_CHMOD_ACL(handle, fname, mode);
1458 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1459 TALLOC_FREE(stripped);
1463 ret = SMB_VFS_NEXT_CHMOD_ACL(handle, conv, mode);
1464 saved_errno = errno;
1466 errno = saved_errno;
1470 static int shadow_copy2_get_real_filename(struct vfs_handle_struct *handle,
1473 TALLOC_CTX *mem_ctx,
1482 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle, path,
1483 ×tamp, &stripped)) {
1486 if (timestamp == 0) {
1487 return SMB_VFS_NEXT_GET_REAL_FILENAME(handle, path, name,
1488 mem_ctx, found_name);
1490 if (stripped[0] == '\0') {
1491 *found_name = talloc_strdup(mem_ctx, name);
1492 if (*found_name == NULL) {
1498 conv = shadow_copy2_convert(talloc_tos(), handle, stripped, timestamp);
1499 TALLOC_FREE(stripped);
1503 ret = SMB_VFS_NEXT_GET_REAL_FILENAME(handle, conv, name,
1504 mem_ctx, found_name);
1505 saved_errno = errno;
1507 errno = saved_errno;
1512 static struct vfs_fn_pointers vfs_shadow_copy2_fns = {
1513 .opendir_fn = shadow_copy2_opendir,
1514 .rename_fn = shadow_copy2_rename,
1515 .link_fn = shadow_copy2_link,
1516 .symlink_fn = shadow_copy2_symlink,
1517 .stat_fn = shadow_copy2_stat,
1518 .lstat_fn = shadow_copy2_lstat,
1519 .fstat_fn = shadow_copy2_fstat,
1520 .open_fn = shadow_copy2_open,
1521 .unlink_fn = shadow_copy2_unlink,
1522 .chmod_fn = shadow_copy2_chmod,
1523 .chown_fn = shadow_copy2_chown,
1524 .chdir_fn = shadow_copy2_chdir,
1525 .ntimes_fn = shadow_copy2_ntimes,
1526 .readlink_fn = shadow_copy2_readlink,
1527 .mknod_fn = shadow_copy2_mknod,
1528 .realpath_fn = shadow_copy2_realpath,
1529 .get_nt_acl_fn = shadow_copy2_get_nt_acl,
1530 .fget_nt_acl_fn = shadow_copy2_fget_nt_acl,
1531 .get_shadow_copy_data_fn = shadow_copy2_get_shadow_copy_data,
1532 .mkdir_fn = shadow_copy2_mkdir,
1533 .rmdir_fn = shadow_copy2_rmdir,
1534 .getxattr_fn = shadow_copy2_getxattr,
1535 .listxattr_fn = shadow_copy2_listxattr,
1536 .removexattr_fn = shadow_copy2_removexattr,
1537 .setxattr_fn = shadow_copy2_setxattr,
1538 .chmod_acl_fn = shadow_copy2_chmod_acl,
1539 .chflags_fn = shadow_copy2_chflags,
1540 .get_real_filename_fn = shadow_copy2_get_real_filename,
1543 NTSTATUS vfs_shadow_copy2_init(void);
1544 NTSTATUS vfs_shadow_copy2_init(void)
1546 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
1547 "shadow_copy2", &vfs_shadow_copy2_fns);