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 #define GMT_NAME_LEN 24 /* length of a @GMT- name */
111 #define GMT_FORMAT "@GMT-%Y.%m.%d-%H.%M.%S"
113 static bool shadow_copy2_find_slashes(TALLOC_CTX
*mem_ctx
, const char *str
,
115 unsigned *pnum_offsets
)
117 unsigned num_offsets
;
124 while ((p
= strchr(p
, '/')) != NULL
) {
129 offsets
= talloc_array(mem_ctx
, size_t, num_offsets
);
130 if (offsets
== NULL
) {
136 while ((p
= strchr(p
, '/')) != NULL
) {
137 offsets
[num_offsets
] = p
-str
;
143 *pnum_offsets
= num_offsets
;
147 static char *shadow_copy2_insert_string(TALLOC_CTX
*mem_ctx
,
148 struct vfs_handle_struct
*handle
,
153 fstring snaptime_string
;
156 fmt
= lp_parm_const_string(SNUM(handle
->conn
), "shadow",
157 "format", GMT_FORMAT
);
159 if (lp_parm_bool(SNUM(handle
->conn
), "shadow", "sscanf", false)) {
160 snaptime_len
= snprintf(snaptime_string
, sizeof(snaptime_string
), fmt
,
161 (unsigned long)snapshot
);
162 if (snaptime_len
<= 0) {
163 DEBUG(10, ("snprintf failed\n"));
167 if (lp_parm_bool(SNUM(handle
->conn
), "shadow", "localtime", false)) {
168 if (localtime_r(&snapshot
, &snap_tm
) == 0) {
169 DEBUG(10, ("gmtime_r failed\n"));
173 if (gmtime_r(&snapshot
, &snap_tm
) == 0) {
174 DEBUG(10, ("gmtime_r failed\n"));
178 snaptime_len
= strftime(snaptime_string
, sizeof(snaptime_string
), fmt
,
180 if (snaptime_len
== 0) {
181 DEBUG(10, ("strftime failed\n"));
185 return talloc_asprintf(mem_ctx
, "/%s/%s",
186 lp_parm_const_string(
187 SNUM(handle
->conn
), "shadow", "snapdir",
192 static bool shadow_copy2_strip_snapshot(TALLOC_CTX
*mem_ctx
,
193 struct vfs_handle_struct
*handle
,
203 size_t rest_len
, dst_len
;
205 p
= strstr_m(name
, "@GMT-");
209 if ((p
> name
) && (p
[-1] != '/')) {
212 q
= strptime(p
, GMT_FORMAT
, &tm
);
217 timestamp
= timegm(&tm
);
218 if (timestamp
== (time_t)-1) {
221 if ((p
== name
) && (q
[0] == '\0')) {
222 if (pstripped
!= NULL
) {
223 stripped
= talloc_strdup(mem_ctx
, "");
224 if (stripped
== NULL
) {
227 *pstripped
= stripped
;
229 *ptimestamp
= timestamp
;
237 rest_len
= strlen(q
);
238 dst_len
= (p
-name
) + rest_len
;
240 if (lp_parm_bool(SNUM(handle
->conn
), "shadow", "snapdirseverywhere",
244 insert
= shadow_copy2_insert_string(talloc_tos(), handle
,
246 if (insert
== NULL
) {
251 have_insert
= (strstr(name
, insert
+1) != NULL
);
258 if (pstripped
!= NULL
) {
259 stripped
= talloc_array(mem_ctx
, char, dst_len
+1);
260 if (stripped
== NULL
) {
265 memcpy(stripped
, name
, p
-name
);
268 memcpy(stripped
+ (p
-name
), q
, rest_len
);
270 stripped
[dst_len
] = '\0';
271 *pstripped
= stripped
;
273 *ptimestamp
= timestamp
;
280 static char *shadow_copy2_find_mount_point(TALLOC_CTX
*mem_ctx
,
281 vfs_handle_struct
*handle
)
283 char *path
= talloc_strdup(mem_ctx
, handle
->conn
->connectpath
);
288 if (stat(path
, &st
) != 0) {
295 while ((p
= strrchr(path
, '/')) && p
> path
) {
297 if (stat(path
, &st
) != 0) {
301 if (st
.st_dev
!= dev
) {
310 static char *shadow_copy2_convert(TALLOC_CTX
*mem_ctx
,
311 struct vfs_handle_struct
*handle
,
312 const char *name
, time_t timestamp
)
314 struct smb_filename converted_fname
;
316 size_t *slashes
= NULL
;
317 unsigned num_slashes
;
321 char *converted
= NULL
;
326 path
= talloc_asprintf(mem_ctx
, "%s/%s", handle
->conn
->connectpath
,
332 pathlen
= talloc_get_size(path
)-1;
334 DEBUG(10, ("converting %s\n", path
));
336 if (!shadow_copy2_find_slashes(talloc_tos(), path
,
337 &slashes
, &num_slashes
)) {
340 insert
= shadow_copy2_insert_string(talloc_tos(), handle
, timestamp
);
341 if (insert
== NULL
) {
344 insertlen
= talloc_get_size(insert
)-1;
345 converted
= talloc_array(mem_ctx
, char, pathlen
+ insertlen
+ 1);
346 if (converted
== NULL
) {
350 if (path
[pathlen
-1] != '/') {
352 * Append a fake slash to find the snapshot root
355 tmp
= talloc_realloc(talloc_tos(), slashes
,
356 size_t, num_slashes
+1);
361 slashes
[num_slashes
] = pathlen
;
367 if (!lp_parm_bool(SNUM(handle
->conn
), "shadow", "crossmountpoints",
371 mount_point
= shadow_copy2_find_mount_point(talloc_tos(),
373 if (mount_point
== NULL
) {
376 min_offset
= strlen(mount_point
);
377 TALLOC_FREE(mount_point
);
380 memcpy(converted
, path
, pathlen
+1);
381 converted
[pathlen
+insertlen
] = '\0';
383 ZERO_STRUCT(converted_fname
);
384 converted_fname
.base_name
= converted
;
386 for (i
= num_slashes
-1; i
>=0; i
--) {
392 if (offset
< min_offset
) {
397 memcpy(converted
+offset
, insert
, insertlen
);
400 memcpy(converted
+offset
, path
+ slashes
[i
],
401 pathlen
- slashes
[i
]);
403 ret
= SMB_VFS_NEXT_LSTAT(handle
, &converted_fname
);
405 DEBUG(10, ("Trying %s: %d (%s)\n", converted
,
406 ret
, ret
== 0 ? "ok" : strerror(errno
)));
411 if (errno
== ENOTDIR
) {
413 * This is a valid condition: We appended the
414 * .snaphots/@GMT.. to a file name. Just try
415 * with the upper levels.
419 if (errno
!= ENOENT
) {
420 /* Other problem than "not found" */
429 DEBUG(10, ("Found %s\n", converted
));
437 TALLOC_FREE(converted
);
439 TALLOC_FREE(slashes
);
446 modify a sbuf return to ensure that inodes in the shadow directory
447 are different from those in the main directory
449 static void convert_sbuf(vfs_handle_struct
*handle
, const char *fname
,
450 SMB_STRUCT_STAT
*sbuf
)
452 if (lp_parm_bool(SNUM(handle
->conn
), "shadow", "fixinodes", False
)) {
453 /* some snapshot systems, like GPFS, return the name
454 device:inode for the snapshot files as the current
455 files. That breaks the 'restore' button in the shadow copy
456 GUI, as the client gets a sharing violation.
458 This is a crude way of allowing both files to be
459 open at once. It has a slight chance of inode
460 number collision, but I can't see a better approach
461 without significant VFS changes
465 shash
= hash(fname
, strlen(fname
), 0) & 0xFF000000;
469 sbuf
->st_ex_ino
^= shash
;
473 static DIR *shadow_copy2_opendir(vfs_handle_struct
*handle
,
484 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
, fname
,
485 ×tamp
, &stripped
)) {
488 if (timestamp
== 0) {
489 return SMB_VFS_NEXT_OPENDIR(handle
, fname
, mask
, attr
);
491 conv
= shadow_copy2_convert(talloc_tos(), handle
, stripped
, timestamp
);
492 TALLOC_FREE(stripped
);
496 ret
= SMB_VFS_NEXT_OPENDIR(handle
, conv
, mask
, attr
);
503 static int shadow_copy2_rename(vfs_handle_struct
*handle
,
504 const struct smb_filename
*smb_fname_src
,
505 const struct smb_filename
*smb_fname_dst
)
507 time_t timestamp_src
, timestamp_dst
;
509 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
,
510 smb_fname_src
->base_name
,
511 ×tamp_src
, NULL
)) {
514 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
,
515 smb_fname_dst
->base_name
,
516 ×tamp_dst
, NULL
)) {
519 if (timestamp_src
!= 0) {
523 if (timestamp_dst
!= 0) {
527 return SMB_VFS_NEXT_RENAME(handle
, smb_fname_src
, smb_fname_dst
);
530 static int shadow_copy2_symlink(vfs_handle_struct
*handle
,
531 const char *oldname
, const char *newname
)
533 time_t timestamp_old
, timestamp_new
;
535 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
, oldname
,
536 ×tamp_old
, NULL
)) {
539 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
, newname
,
540 ×tamp_new
, NULL
)) {
543 if ((timestamp_old
!= 0) || (timestamp_new
!= 0)) {
547 return SMB_VFS_NEXT_SYMLINK(handle
, oldname
, newname
);
550 static int shadow_copy2_link(vfs_handle_struct
*handle
,
551 const char *oldname
, const char *newname
)
553 time_t timestamp_old
, timestamp_new
;
555 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
, oldname
,
556 ×tamp_old
, NULL
)) {
559 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
, newname
,
560 ×tamp_new
, NULL
)) {
563 if ((timestamp_old
!= 0) || (timestamp_new
!= 0)) {
567 return SMB_VFS_NEXT_LINK(handle
, oldname
, newname
);
570 static int shadow_copy2_stat(vfs_handle_struct
*handle
,
571 struct smb_filename
*smb_fname
)
574 char *stripped
, *tmp
;
575 int ret
, saved_errno
;
577 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
,
578 smb_fname
->base_name
,
579 ×tamp
, &stripped
)) {
582 if (timestamp
== 0) {
583 return SMB_VFS_NEXT_STAT(handle
, smb_fname
);
586 tmp
= smb_fname
->base_name
;
587 smb_fname
->base_name
= shadow_copy2_convert(
588 talloc_tos(), handle
, stripped
, timestamp
);
589 TALLOC_FREE(stripped
);
591 if (smb_fname
->base_name
== NULL
) {
592 smb_fname
->base_name
= tmp
;
596 ret
= SMB_VFS_NEXT_STAT(handle
, smb_fname
);
599 TALLOC_FREE(smb_fname
->base_name
);
600 smb_fname
->base_name
= tmp
;
603 convert_sbuf(handle
, smb_fname
->base_name
, &smb_fname
->st
);
609 static int shadow_copy2_lstat(vfs_handle_struct
*handle
,
610 struct smb_filename
*smb_fname
)
613 char *stripped
, *tmp
;
614 int ret
, saved_errno
;
616 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
,
617 smb_fname
->base_name
,
618 ×tamp
, &stripped
)) {
621 if (timestamp
== 0) {
622 return SMB_VFS_NEXT_LSTAT(handle
, smb_fname
);
625 tmp
= smb_fname
->base_name
;
626 smb_fname
->base_name
= shadow_copy2_convert(
627 talloc_tos(), handle
, stripped
, timestamp
);
628 TALLOC_FREE(stripped
);
630 if (smb_fname
->base_name
== NULL
) {
631 smb_fname
->base_name
= tmp
;
635 ret
= SMB_VFS_NEXT_LSTAT(handle
, smb_fname
);
638 TALLOC_FREE(smb_fname
->base_name
);
639 smb_fname
->base_name
= tmp
;
642 convert_sbuf(handle
, smb_fname
->base_name
, &smb_fname
->st
);
648 static int shadow_copy2_fstat(vfs_handle_struct
*handle
, files_struct
*fsp
,
649 SMB_STRUCT_STAT
*sbuf
)
654 ret
= SMB_VFS_NEXT_FSTAT(handle
, fsp
, sbuf
);
658 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
,
659 fsp
->fsp_name
->base_name
,
663 if (timestamp
!= 0) {
664 convert_sbuf(handle
, fsp
->fsp_name
->base_name
, sbuf
);
669 static int shadow_copy2_open(vfs_handle_struct
*handle
,
670 struct smb_filename
*smb_fname
, files_struct
*fsp
,
671 int flags
, mode_t mode
)
674 char *stripped
, *tmp
;
675 int ret
, saved_errno
;
677 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
,
678 smb_fname
->base_name
,
679 ×tamp
, &stripped
)) {
682 if (timestamp
== 0) {
683 return SMB_VFS_NEXT_OPEN(handle
, smb_fname
, fsp
, flags
, mode
);
686 tmp
= smb_fname
->base_name
;
687 smb_fname
->base_name
= shadow_copy2_convert(
688 talloc_tos(), handle
, stripped
, timestamp
);
689 TALLOC_FREE(stripped
);
691 if (smb_fname
->base_name
== NULL
) {
692 smb_fname
->base_name
= tmp
;
696 ret
= SMB_VFS_NEXT_OPEN(handle
, smb_fname
, fsp
, flags
, mode
);
699 TALLOC_FREE(smb_fname
->base_name
);
700 smb_fname
->base_name
= tmp
;
706 static int shadow_copy2_unlink(vfs_handle_struct
*handle
,
707 const struct smb_filename
*smb_fname
)
711 int ret
, saved_errno
;
712 struct smb_filename
*conv
;
715 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
,
716 smb_fname
->base_name
,
717 ×tamp
, &stripped
)) {
720 if (timestamp
== 0) {
721 return SMB_VFS_NEXT_UNLINK(handle
, smb_fname
);
723 status
= copy_smb_filename(talloc_tos(), smb_fname
, &conv
);
724 if (!NT_STATUS_IS_OK(status
)) {
728 conv
->base_name
= shadow_copy2_convert(
729 conv
, handle
, stripped
, timestamp
);
730 TALLOC_FREE(stripped
);
731 if (conv
->base_name
== NULL
) {
734 ret
= SMB_VFS_NEXT_UNLINK(handle
, conv
);
741 static int shadow_copy2_chmod(vfs_handle_struct
*handle
, const char *fname
,
746 int ret
, saved_errno
;
749 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
, fname
,
750 ×tamp
, &stripped
)) {
753 if (timestamp
== 0) {
754 return SMB_VFS_NEXT_CHMOD(handle
, fname
, mode
);
756 conv
= shadow_copy2_convert(talloc_tos(), handle
, stripped
, timestamp
);
757 TALLOC_FREE(stripped
);
761 ret
= SMB_VFS_NEXT_CHMOD(handle
, conv
, mode
);
768 static int shadow_copy2_chown(vfs_handle_struct
*handle
, const char *fname
,
769 uid_t uid
, gid_t gid
)
773 int ret
, saved_errno
;
776 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
, fname
,
777 ×tamp
, &stripped
)) {
780 if (timestamp
== 0) {
781 return SMB_VFS_NEXT_CHOWN(handle
, fname
, uid
, gid
);
783 conv
= shadow_copy2_convert(talloc_tos(), handle
, stripped
, timestamp
);
784 TALLOC_FREE(stripped
);
788 ret
= SMB_VFS_NEXT_CHOWN(handle
, conv
, uid
, gid
);
795 static int shadow_copy2_chdir(vfs_handle_struct
*handle
,
800 int ret
, saved_errno
;
803 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
, fname
,
804 ×tamp
, &stripped
)) {
807 if (timestamp
== 0) {
808 return SMB_VFS_NEXT_CHDIR(handle
, fname
);
810 conv
= shadow_copy2_convert(talloc_tos(), handle
, stripped
, timestamp
);
811 TALLOC_FREE(stripped
);
815 ret
= SMB_VFS_NEXT_CHDIR(handle
, conv
);
822 static int shadow_copy2_ntimes(vfs_handle_struct
*handle
,
823 const struct smb_filename
*smb_fname
,
824 struct smb_file_time
*ft
)
828 int ret
, saved_errno
;
829 struct smb_filename
*conv
;
832 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
,
833 smb_fname
->base_name
,
834 ×tamp
, &stripped
)) {
837 if (timestamp
== 0) {
838 return SMB_VFS_NEXT_NTIMES(handle
, smb_fname
, ft
);
840 status
= copy_smb_filename(talloc_tos(), smb_fname
, &conv
);
841 if (!NT_STATUS_IS_OK(status
)) {
845 conv
->base_name
= shadow_copy2_convert(
846 conv
, handle
, stripped
, timestamp
);
847 TALLOC_FREE(stripped
);
848 if (conv
->base_name
== NULL
) {
851 ret
= SMB_VFS_NEXT_NTIMES(handle
, conv
, ft
);
858 static int shadow_copy2_readlink(vfs_handle_struct
*handle
,
859 const char *fname
, char *buf
, size_t bufsiz
)
863 int ret
, saved_errno
;
866 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
, fname
,
867 ×tamp
, &stripped
)) {
870 if (timestamp
== 0) {
871 return SMB_VFS_NEXT_READLINK(handle
, fname
, buf
, bufsiz
);
873 conv
= shadow_copy2_convert(talloc_tos(), handle
, stripped
, timestamp
);
874 TALLOC_FREE(stripped
);
878 ret
= SMB_VFS_NEXT_READLINK(handle
, conv
, buf
, bufsiz
);
885 static int shadow_copy2_mknod(vfs_handle_struct
*handle
,
886 const char *fname
, mode_t mode
, SMB_DEV_T dev
)
890 int ret
, saved_errno
;
893 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
, fname
,
894 ×tamp
, &stripped
)) {
897 if (timestamp
== 0) {
898 return SMB_VFS_NEXT_MKNOD(handle
, fname
, mode
, dev
);
900 conv
= shadow_copy2_convert(talloc_tos(), handle
, stripped
, timestamp
);
901 TALLOC_FREE(stripped
);
905 ret
= SMB_VFS_NEXT_MKNOD(handle
, conv
, mode
, dev
);
912 static char *shadow_copy2_realpath(vfs_handle_struct
*handle
,
916 char *stripped
= NULL
;
919 char *inserted
= NULL
;
920 char *inserted_to
, *inserted_end
;
923 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
, fname
,
924 ×tamp
, &stripped
)) {
927 if (timestamp
== 0) {
928 return SMB_VFS_NEXT_REALPATH(handle
, fname
);
931 tmp
= shadow_copy2_convert(talloc_tos(), handle
, stripped
, timestamp
);
936 result
= SMB_VFS_NEXT_REALPATH(handle
, tmp
);
937 if (result
== NULL
) {
942 * Take away what we've inserted. This removes the @GMT-thingy
943 * completely, but will give a path under the share root.
945 inserted
= shadow_copy2_insert_string(talloc_tos(), handle
, timestamp
);
946 if (inserted
== NULL
) {
949 inserted_to
= strstr_m(result
, inserted
);
950 if (inserted_to
== NULL
) {
951 DEBUG(2, ("SMB_VFS_NEXT_REALPATH removed %s\n", inserted
));
954 inserted_end
= inserted_to
+ talloc_get_size(inserted
) - 1;
955 memmove(inserted_to
, inserted_end
, strlen(inserted_end
)+1);
959 TALLOC_FREE(inserted
);
961 TALLOC_FREE(stripped
);
966 static char *have_snapdir(struct vfs_handle_struct
*handle
,
969 struct smb_filename smb_fname
;
972 ZERO_STRUCT(smb_fname
);
973 smb_fname
.base_name
= talloc_asprintf(
974 talloc_tos(), "%s/%s", path
,
975 lp_parm_const_string(SNUM(handle
->conn
), "shadow", "snapdir",
977 if (smb_fname
.base_name
== NULL
) {
981 ret
= SMB_VFS_NEXT_STAT(handle
, &smb_fname
);
982 if ((ret
== 0) && (S_ISDIR(smb_fname
.st
.st_ex_mode
))) {
983 return smb_fname
.base_name
;
985 TALLOC_FREE(smb_fname
.base_name
);
989 static char *shadow_copy2_find_snapdir(TALLOC_CTX
*mem_ctx
,
990 struct vfs_handle_struct
*handle
,
991 struct smb_filename
*smb_fname
)
996 path
= talloc_asprintf(mem_ctx
, "%s/%s",
997 handle
->conn
->connectpath
,
998 smb_fname
->base_name
);
1003 snapdir
= have_snapdir(handle
, path
);
1004 if (snapdir
!= NULL
) {
1009 while ((p
= strrchr(path
, '/')) && (p
> path
)) {
1013 snapdir
= have_snapdir(handle
, path
);
1014 if (snapdir
!= NULL
) {
1023 static bool shadow_copy2_snapshot_to_gmt(vfs_handle_struct
*handle
,
1025 char *gmt
, size_t gmt_len
)
1027 struct tm timestamp
;
1029 unsigned long int timestamp_long
;
1032 fmt
= lp_parm_const_string(SNUM(handle
->conn
), "shadow",
1033 "format", GMT_FORMAT
);
1035 ZERO_STRUCT(timestamp
);
1036 if (lp_parm_bool(SNUM(handle
->conn
), "shadow", "sscanf", false)) {
1037 if (sscanf(name
, fmt
, ×tamp_long
) != 1) {
1038 DEBUG(10, ("shadow_copy2_snapshot_to_gmt: no sscanf match %s: %s\n",
1042 timestamp_t
= timestamp_long
;
1043 gmtime_r(×tamp_t
, ×tamp
);
1045 if (strptime(name
, fmt
, ×tamp
) == NULL
) {
1046 DEBUG(10, ("shadow_copy2_snapshot_to_gmt: no match %s: %s\n",
1050 DEBUG(10, ("shadow_copy2_snapshot_to_gmt: match %s: %s\n", fmt
, name
));
1052 if (lp_parm_bool(SNUM(handle
->conn
), "shadow", "localtime", false)) {
1053 timestamp
.tm_isdst
= -1;
1054 timestamp_t
= mktime(×tamp
);
1055 gmtime_r(×tamp_t
, ×tamp
);
1059 strftime(gmt
, gmt_len
, GMT_FORMAT
, ×tamp
);
1063 static int shadow_copy2_label_cmp_asc(const void *x
, const void *y
)
1065 return strncmp((const char *)x
, (const char *)y
, sizeof(SHADOW_COPY_LABEL
));
1068 static int shadow_copy2_label_cmp_desc(const void *x
, const void *y
)
1070 return -strncmp((const char *)x
, (const char *)y
, sizeof(SHADOW_COPY_LABEL
));
1074 sort the shadow copy data in ascending or descending order
1076 static void shadow_copy2_sort_data(vfs_handle_struct
*handle
,
1077 struct shadow_copy_data
*shadow_copy2_data
)
1079 int (*cmpfunc
)(const void *, const void *);
1082 sort
= lp_parm_const_string(SNUM(handle
->conn
), "shadow",
1088 if (strcmp(sort
, "asc") == 0) {
1089 cmpfunc
= shadow_copy2_label_cmp_asc
;
1090 } else if (strcmp(sort
, "desc") == 0) {
1091 cmpfunc
= shadow_copy2_label_cmp_desc
;
1096 if (shadow_copy2_data
&& shadow_copy2_data
->num_volumes
> 0 &&
1097 shadow_copy2_data
->labels
)
1099 TYPESAFE_QSORT(shadow_copy2_data
->labels
,
1100 shadow_copy2_data
->num_volumes
,
1105 static int shadow_copy2_get_shadow_copy_data(
1106 vfs_handle_struct
*handle
, files_struct
*fsp
,
1107 struct shadow_copy_data
*shadow_copy2_data
,
1111 const char *snapdir
;
1113 TALLOC_CTX
*tmp_ctx
= talloc_stackframe();
1115 snapdir
= shadow_copy2_find_snapdir(tmp_ctx
, handle
, fsp
->fsp_name
);
1116 if (snapdir
== NULL
) {
1117 DEBUG(0,("shadow:snapdir not found for %s in get_shadow_copy_data\n",
1118 handle
->conn
->connectpath
));
1120 talloc_free(tmp_ctx
);
1124 p
= SMB_VFS_NEXT_OPENDIR(handle
, snapdir
, NULL
, 0);
1127 DEBUG(2,("shadow_copy2: SMB_VFS_NEXT_OPENDIR() failed for '%s'"
1128 " - %s\n", snapdir
, strerror(errno
)));
1129 talloc_free(tmp_ctx
);
1134 shadow_copy2_data
->num_volumes
= 0;
1135 shadow_copy2_data
->labels
= NULL
;
1137 while ((d
= SMB_VFS_NEXT_READDIR(handle
, p
, NULL
))) {
1138 char snapshot
[GMT_NAME_LEN
+1];
1139 SHADOW_COPY_LABEL
*tlabels
;
1142 * ignore names not of the right form in the snapshot
1145 if (!shadow_copy2_snapshot_to_gmt(
1147 snapshot
, sizeof(snapshot
))) {
1149 DEBUG(6, ("shadow_copy2_get_shadow_copy_data: "
1150 "ignoring %s\n", d
->d_name
));
1153 DEBUG(6,("shadow_copy2_get_shadow_copy_data: %s -> %s\n",
1154 d
->d_name
, snapshot
));
1157 /* the caller doesn't want the labels */
1158 shadow_copy2_data
->num_volumes
++;
1162 tlabels
= talloc_realloc(shadow_copy2_data
,
1163 shadow_copy2_data
->labels
,
1165 shadow_copy2_data
->num_volumes
+1);
1166 if (tlabels
== NULL
) {
1167 DEBUG(0,("shadow_copy2: out of memory\n"));
1168 SMB_VFS_NEXT_CLOSEDIR(handle
, p
);
1169 talloc_free(tmp_ctx
);
1173 strlcpy(tlabels
[shadow_copy2_data
->num_volumes
], snapshot
,
1176 shadow_copy2_data
->num_volumes
++;
1177 shadow_copy2_data
->labels
= tlabels
;
1180 SMB_VFS_NEXT_CLOSEDIR(handle
,p
);
1182 shadow_copy2_sort_data(handle
, shadow_copy2_data
);
1184 talloc_free(tmp_ctx
);
1188 static NTSTATUS
shadow_copy2_fget_nt_acl(vfs_handle_struct
*handle
,
1189 struct files_struct
*fsp
,
1190 uint32 security_info
,
1191 TALLOC_CTX
*mem_ctx
,
1192 struct security_descriptor
**ppdesc
)
1199 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
,
1200 fsp
->fsp_name
->base_name
,
1201 ×tamp
, &stripped
)) {
1202 return map_nt_error_from_unix(errno
);
1204 if (timestamp
== 0) {
1205 return SMB_VFS_NEXT_FGET_NT_ACL(handle
, fsp
, security_info
,
1209 conv
= shadow_copy2_convert(talloc_tos(), handle
, stripped
, timestamp
);
1210 TALLOC_FREE(stripped
);
1212 return map_nt_error_from_unix(errno
);
1214 status
= SMB_VFS_NEXT_GET_NT_ACL(handle
, conv
, security_info
,
1220 static NTSTATUS
shadow_copy2_get_nt_acl(vfs_handle_struct
*handle
,
1222 uint32 security_info
,
1223 TALLOC_CTX
*mem_ctx
,
1224 struct security_descriptor
**ppdesc
)
1231 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
, fname
,
1232 ×tamp
, &stripped
)) {
1233 return map_nt_error_from_unix(errno
);
1235 if (timestamp
== 0) {
1236 return SMB_VFS_NEXT_GET_NT_ACL(handle
, fname
, security_info
,
1239 conv
= shadow_copy2_convert(talloc_tos(), handle
, stripped
, timestamp
);
1240 TALLOC_FREE(stripped
);
1242 return map_nt_error_from_unix(errno
);
1244 status
= SMB_VFS_NEXT_GET_NT_ACL(handle
, conv
, security_info
,
1250 static int shadow_copy2_mkdir(vfs_handle_struct
*handle
,
1251 const char *fname
, mode_t mode
)
1255 int ret
, saved_errno
;
1258 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
, fname
,
1259 ×tamp
, &stripped
)) {
1262 if (timestamp
== 0) {
1263 return SMB_VFS_NEXT_MKDIR(handle
, fname
, mode
);
1265 conv
= shadow_copy2_convert(talloc_tos(), handle
, stripped
, timestamp
);
1266 TALLOC_FREE(stripped
);
1270 ret
= SMB_VFS_NEXT_MKDIR(handle
, conv
, mode
);
1271 saved_errno
= errno
;
1273 errno
= saved_errno
;
1277 static int shadow_copy2_rmdir(vfs_handle_struct
*handle
, const char *fname
)
1281 int ret
, saved_errno
;
1284 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
, fname
,
1285 ×tamp
, &stripped
)) {
1288 if (timestamp
== 0) {
1289 return SMB_VFS_NEXT_RMDIR(handle
, fname
);
1291 conv
= shadow_copy2_convert(talloc_tos(), handle
, stripped
, timestamp
);
1292 TALLOC_FREE(stripped
);
1296 ret
= SMB_VFS_NEXT_RMDIR(handle
, conv
);
1297 saved_errno
= errno
;
1299 errno
= saved_errno
;
1303 static int shadow_copy2_chflags(vfs_handle_struct
*handle
, const char *fname
,
1308 int ret
, saved_errno
;
1311 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
, fname
,
1312 ×tamp
, &stripped
)) {
1315 if (timestamp
== 0) {
1316 return SMB_VFS_NEXT_CHFLAGS(handle
, fname
, flags
);
1318 conv
= shadow_copy2_convert(talloc_tos(), handle
, stripped
, timestamp
);
1319 TALLOC_FREE(stripped
);
1323 ret
= SMB_VFS_NEXT_CHFLAGS(handle
, conv
, flags
);
1324 saved_errno
= errno
;
1326 errno
= saved_errno
;
1330 static ssize_t
shadow_copy2_getxattr(vfs_handle_struct
*handle
,
1331 const char *fname
, const char *aname
,
1332 void *value
, size_t size
)
1340 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
, fname
,
1341 ×tamp
, &stripped
)) {
1344 if (timestamp
== 0) {
1345 return SMB_VFS_NEXT_GETXATTR(handle
, fname
, aname
, value
,
1348 conv
= shadow_copy2_convert(talloc_tos(), handle
, stripped
, timestamp
);
1349 TALLOC_FREE(stripped
);
1353 ret
= SMB_VFS_NEXT_GETXATTR(handle
, conv
, aname
, value
, size
);
1354 saved_errno
= errno
;
1356 errno
= saved_errno
;
1360 static ssize_t
shadow_copy2_listxattr(struct vfs_handle_struct
*handle
,
1362 char *list
, size_t size
)
1370 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
, fname
,
1371 ×tamp
, &stripped
)) {
1374 if (timestamp
== 0) {
1375 return SMB_VFS_NEXT_LISTXATTR(handle
, fname
, list
, size
);
1377 conv
= shadow_copy2_convert(talloc_tos(), handle
, stripped
, timestamp
);
1378 TALLOC_FREE(stripped
);
1382 ret
= SMB_VFS_NEXT_LISTXATTR(handle
, conv
, list
, size
);
1383 saved_errno
= errno
;
1385 errno
= saved_errno
;
1389 static int shadow_copy2_removexattr(vfs_handle_struct
*handle
,
1390 const char *fname
, const char *aname
)
1394 int ret
, saved_errno
;
1397 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
, fname
,
1398 ×tamp
, &stripped
)) {
1401 if (timestamp
== 0) {
1402 return SMB_VFS_NEXT_REMOVEXATTR(handle
, fname
, aname
);
1404 conv
= shadow_copy2_convert(talloc_tos(), handle
, stripped
, timestamp
);
1405 TALLOC_FREE(stripped
);
1409 ret
= SMB_VFS_NEXT_REMOVEXATTR(handle
, conv
, aname
);
1410 saved_errno
= errno
;
1412 errno
= saved_errno
;
1416 static int shadow_copy2_setxattr(struct vfs_handle_struct
*handle
,
1418 const char *aname
, const void *value
,
1419 size_t size
, int flags
)
1427 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
, fname
,
1428 ×tamp
, &stripped
)) {
1431 if (timestamp
== 0) {
1432 return SMB_VFS_NEXT_SETXATTR(handle
, fname
, aname
, value
, size
,
1435 conv
= shadow_copy2_convert(talloc_tos(), handle
, stripped
, timestamp
);
1436 TALLOC_FREE(stripped
);
1440 ret
= SMB_VFS_NEXT_SETXATTR(handle
, conv
, aname
, value
, size
, flags
);
1441 saved_errno
= errno
;
1443 errno
= saved_errno
;
1447 static int shadow_copy2_chmod_acl(vfs_handle_struct
*handle
,
1448 const char *fname
, mode_t mode
)
1456 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
, fname
,
1457 ×tamp
, &stripped
)) {
1460 if (timestamp
== 0) {
1461 return SMB_VFS_NEXT_CHMOD_ACL(handle
, fname
, mode
);
1463 conv
= shadow_copy2_convert(talloc_tos(), handle
, stripped
, timestamp
);
1464 TALLOC_FREE(stripped
);
1468 ret
= SMB_VFS_NEXT_CHMOD_ACL(handle
, conv
, mode
);
1469 saved_errno
= errno
;
1471 errno
= saved_errno
;
1475 static int shadow_copy2_get_real_filename(struct vfs_handle_struct
*handle
,
1478 TALLOC_CTX
*mem_ctx
,
1487 if (!shadow_copy2_strip_snapshot(talloc_tos(), handle
, path
,
1488 ×tamp
, &stripped
)) {
1491 if (timestamp
== 0) {
1492 return SMB_VFS_NEXT_GET_REAL_FILENAME(handle
, path
, name
,
1493 mem_ctx
, found_name
);
1495 if (stripped
[0] == '\0') {
1496 *found_name
= talloc_strdup(mem_ctx
, name
);
1497 if (*found_name
== NULL
) {
1503 conv
= shadow_copy2_convert(talloc_tos(), handle
, stripped
, timestamp
);
1504 TALLOC_FREE(stripped
);
1508 ret
= SMB_VFS_NEXT_GET_REAL_FILENAME(handle
, conv
, name
,
1509 mem_ctx
, found_name
);
1510 saved_errno
= errno
;
1512 errno
= saved_errno
;
1517 static struct vfs_fn_pointers vfs_shadow_copy2_fns
= {
1518 .opendir_fn
= shadow_copy2_opendir
,
1519 .rename_fn
= shadow_copy2_rename
,
1520 .link_fn
= shadow_copy2_link
,
1521 .symlink_fn
= shadow_copy2_symlink
,
1522 .stat_fn
= shadow_copy2_stat
,
1523 .lstat_fn
= shadow_copy2_lstat
,
1524 .fstat_fn
= shadow_copy2_fstat
,
1525 .open_fn
= shadow_copy2_open
,
1526 .unlink_fn
= shadow_copy2_unlink
,
1527 .chmod_fn
= shadow_copy2_chmod
,
1528 .chown_fn
= shadow_copy2_chown
,
1529 .chdir_fn
= shadow_copy2_chdir
,
1530 .ntimes_fn
= shadow_copy2_ntimes
,
1531 .readlink_fn
= shadow_copy2_readlink
,
1532 .mknod_fn
= shadow_copy2_mknod
,
1533 .realpath_fn
= shadow_copy2_realpath
,
1534 .get_nt_acl_fn
= shadow_copy2_get_nt_acl
,
1535 .fget_nt_acl_fn
= shadow_copy2_fget_nt_acl
,
1536 .get_shadow_copy_data_fn
= shadow_copy2_get_shadow_copy_data
,
1537 .mkdir_fn
= shadow_copy2_mkdir
,
1538 .rmdir_fn
= shadow_copy2_rmdir
,
1539 .getxattr_fn
= shadow_copy2_getxattr
,
1540 .listxattr_fn
= shadow_copy2_listxattr
,
1541 .removexattr_fn
= shadow_copy2_removexattr
,
1542 .setxattr_fn
= shadow_copy2_setxattr
,
1543 .chmod_acl_fn
= shadow_copy2_chmod_acl
,
1544 .chflags_fn
= shadow_copy2_chflags
,
1545 .get_real_filename_fn
= shadow_copy2_get_real_filename
,
1548 NTSTATUS
vfs_shadow_copy2_init(void);
1549 NTSTATUS
vfs_shadow_copy2_init(void)
1551 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION
,
1552 "shadow_copy2", &vfs_shadow_copy2_fns
);