2 * implementation of an Shadow Copy module - version 2
4 * Copyright (C) Andrew Tridgell 2007
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 This is a 2nd implemetation of a shadow copy module for exposing
26 snapshots to windows clients as shadow copies. This version has the
29 1) you don't need to populate your shares with symlinks to the
30 snapshots. This can be very important when you have thousands of
31 shares, or use [homes]
33 2) the inode number of the files is altered so it is different
34 from the original. This allows the 'restore' button to work
35 without a sharing violation
39 shadow:snapdir = <directory where snapshots are kept>
41 This is the directory containing the @GMT-* snapshot directories. If it is an absolute
42 path it is used as-is. If it is a relative path, then it is taken relative to the mount
43 point of the filesystem that the root of this share is on
45 shadow:basedir = <base directory that snapshots are from>
47 This is an optional parameter that specifies the directory that
48 the snapshots are relative to. It defaults to the filesystem
51 shadow:fixinodes = yes/no
53 If you enable shadow:fixinodes then this module will modify the
54 apparent inode number of files in the snapshot directories using
55 a hash of the files path. This is needed for snapshot systems
56 where the snapshots have the same device:inode number as the
57 original files (such as happens with GPFS snapshots). If you
58 don't set this option then the 'restore' button in the shadow
59 copy UI will fail with a sharing violation.
61 Note that the directory names in the snapshot directory must take the form
62 @GMT-YYYY.MM.DD-HH.MM.SS
64 The following command would generate a correctly formatted directory name:
65 date -u +@GMT-%Y.%m.%d-%H.%M.%S
69 static int vfs_shadow_copy2_debug_level = DBGC_VFS;
72 #define DBGC_CLASS vfs_shadow_copy2_debug_level
74 #define GMT_NAME_LEN 24 /* length of a @GMT- name */
77 make very sure it is one of our special names
79 static inline bool shadow_copy2_match_name(const char *name)
81 unsigned year, month, day, hr, min, sec;
82 if (name[0] != '@') return False;
83 if (strncmp(name, "@GMT-", 5) != 0) return False;
84 if (sscanf(name, "@GMT-%04u.%02u.%02u-%02u.%02u.%02u", &year, &month,
85 &day, &hr, &min, &sec) != 6) {
88 if (name[24] != 0 && name[24] != '/') {
95 convert a name to the shadow directory
98 #define _SHADOW2_NEXT(op, args, rtype, eret, extra) do { \
99 const char *name = fname; \
100 if (shadow_copy2_match_name(fname)) { \
103 name2 = convert_shadow2_name(handle, fname); \
104 if (name2 == NULL) { \
109 ret = SMB_VFS_NEXT_ ## op args; \
110 talloc_free(name2); \
111 if (ret != eret) extra; \
114 return SMB_VFS_NEXT_ ## op args; \
118 #define _SHADOW2_NEXT_SMB_FNAME(op, args, rtype, eret, extra) do { \
119 if (shadow_copy2_match_name(smb_fname->base_name)) { \
121 char *smb_base_name_tmp = NULL; \
123 name2 = convert_shadow2_name(handle, smb_fname->base_name); \
124 if (name2 == NULL) { \
128 smb_base_name_tmp = smb_fname->base_name; \
129 smb_fname->base_name = name2; \
130 ret = SMB_VFS_NEXT_ ## op args; \
131 smb_fname->base_name = smb_base_name_tmp; \
132 talloc_free(name2); \
133 if (ret != eret) extra; \
136 return SMB_VFS_NEXT_ ## op args; \
141 convert a name to the shadow directory: NTSTATUS-specific handling
144 #define _SHADOW2_NTSTATUS_NEXT(op, args, eret, extra) do { \
145 const char *name = fname; \
146 if (shadow_copy2_match_name(fname)) { \
149 name2 = convert_shadow2_name(handle, fname); \
150 if (name2 == NULL) { \
155 ret = SMB_VFS_NEXT_ ## op args; \
156 talloc_free(name2); \
157 if (!NT_STATUS_EQUAL(ret, eret)) extra; \
160 return SMB_VFS_NEXT_ ## op args; \
164 #define SHADOW2_NTSTATUS_NEXT(op, args, eret) _SHADOW2_NTSTATUS_NEXT(op, args, eret, )
166 #define SHADOW2_NEXT(op, args, rtype, eret) _SHADOW2_NEXT(op, args, rtype, eret, )
168 #define SHADOW2_NEXT_SMB_FNAME(op, args, rtype, eret) _SHADOW2_NEXT_SMB_FNAME(op, args, rtype, eret, )
170 #define SHADOW2_NEXT2(op, args) do { \
171 if (shadow_copy2_match_name(oldname) || shadow_copy2_match_name(newname)) { \
175 return SMB_VFS_NEXT_ ## op args; \
181 find the mount point of a filesystem
183 static char *find_mount_point(TALLOC_CTX *mem_ctx, vfs_handle_struct *handle)
185 char *path = talloc_strdup(mem_ctx, handle->conn->connectpath);
190 if (stat(path, &st) != 0) {
197 while ((p = strrchr(path, '/')) && p > path) {
199 if (stat(path, &st) != 0) {
203 if (st.st_dev != dev) {
213 work out the location of the snapshot for this share
215 static const char *shadow_copy2_find_snapdir(TALLOC_CTX *mem_ctx, vfs_handle_struct *handle)
221 snapdir = lp_parm_const_string(SNUM(handle->conn), "shadow", "snapdir", NULL);
222 if (snapdir == NULL) {
225 /* if its an absolute path, we're done */
226 if (*snapdir == '/') {
230 /* other its relative to the filesystem mount point */
231 mount_point = find_mount_point(mem_ctx, handle);
232 if (mount_point == NULL) {
236 ret = talloc_asprintf(mem_ctx, "%s/%s", mount_point, snapdir);
237 talloc_free(mount_point);
242 work out the location of the base directory for snapshots of this share
244 static const char *shadow_copy2_find_basedir(TALLOC_CTX *mem_ctx, vfs_handle_struct *handle)
246 const char *basedir = lp_parm_const_string(SNUM(handle->conn), "shadow", "basedir", NULL);
248 /* other its the filesystem mount point */
249 if (basedir == NULL) {
250 basedir = find_mount_point(mem_ctx, handle);
257 convert a filename from a share relative path, to a path in the
260 static char *convert_shadow2_name(vfs_handle_struct *handle, const char *fname)
262 TALLOC_CTX *tmp_ctx = talloc_new(handle->data);
263 const char *snapdir, *relpath, *baseoffset, *basedir;
267 snapdir = shadow_copy2_find_snapdir(tmp_ctx, handle);
268 if (snapdir == NULL) {
269 DEBUG(2,("no snapdir found for share at %s\n", handle->conn->connectpath));
270 talloc_free(tmp_ctx);
274 basedir = shadow_copy2_find_basedir(tmp_ctx, handle);
275 if (basedir == NULL) {
276 DEBUG(2,("no basedir found for share at %s\n", handle->conn->connectpath));
277 talloc_free(tmp_ctx);
281 relpath = fname + GMT_NAME_LEN;
282 baselen = strlen(basedir);
283 baseoffset = handle->conn->connectpath + baselen;
285 /* some sanity checks */
286 if (strncmp(basedir, handle->conn->connectpath, baselen) != 0 ||
287 (handle->conn->connectpath[baselen] != 0 && handle->conn->connectpath[baselen] != '/')) {
288 DEBUG(0,("convert_shadow2_name: basedir %s is not a parent of %s\n",
289 basedir, handle->conn->connectpath));
290 talloc_free(tmp_ctx);
294 if (*relpath == '/') relpath++;
295 if (*baseoffset == '/') baseoffset++;
297 ret = talloc_asprintf(handle->data, "%s/%.*s/%s/%s",
302 DEBUG(6,("convert_shadow2_name: '%s' -> '%s'\n", fname, ret));
303 talloc_free(tmp_ctx);
311 static uint32 string_hash(const char *s)
315 n = ((n << 5) + n) ^ (uint32)(*s++);
321 modify a sbuf return to ensure that inodes in the shadow directory
322 are different from those in the main directory
324 static void convert_sbuf(vfs_handle_struct *handle, const char *fname, SMB_STRUCT_STAT *sbuf)
326 if (lp_parm_bool(SNUM(handle->conn), "shadow", "fixinodes", False)) {
327 /* some snapshot systems, like GPFS, return the name
328 device:inode for the snapshot files as the current
329 files. That breaks the 'restore' button in the shadow copy
330 GUI, as the client gets a sharing violation.
332 This is a crude way of allowing both files to be
333 open at once. It has a slight chance of inode
334 number collision, but I can't see a better approach
335 without significant VFS changes
337 uint32_t shash = string_hash(fname) & 0xFF000000;
341 sbuf->st_ex_ino ^= shash;
345 static int shadow_copy2_rename(vfs_handle_struct *handle,
346 const char *oldname, const char *newname)
348 SHADOW2_NEXT2(RENAME, (handle, oldname, newname));
351 static int shadow_copy2_symlink(vfs_handle_struct *handle,
352 const char *oldname, const char *newname)
354 SHADOW2_NEXT2(SYMLINK, (handle, oldname, newname));
357 static int shadow_copy2_link(vfs_handle_struct *handle,
358 const char *oldname, const char *newname)
360 SHADOW2_NEXT2(LINK, (handle, oldname, newname));
363 static int shadow_copy2_open(vfs_handle_struct *handle,
364 struct smb_filename *smb_fname, files_struct *fsp,
365 int flags, mode_t mode)
367 SHADOW2_NEXT_SMB_FNAME(OPEN,
368 (handle, smb_fname, fsp, flags, mode),
372 static SMB_STRUCT_DIR *shadow_copy2_opendir(vfs_handle_struct *handle,
373 const char *fname, const char *mask, uint32 attr)
375 SHADOW2_NEXT(OPENDIR, (handle, name, mask, attr), SMB_STRUCT_DIR *, NULL);
378 static int shadow_copy2_stat(vfs_handle_struct *handle,
379 struct smb_filename *smb_fname)
381 _SHADOW2_NEXT_SMB_FNAME(STAT, (handle, smb_fname), int, -1,
382 convert_sbuf(handle, smb_fname->base_name,
386 static int shadow_copy2_lstat(vfs_handle_struct *handle,
387 struct smb_filename *smb_fname)
389 _SHADOW2_NEXT_SMB_FNAME(LSTAT, (handle, smb_fname), int, -1,
390 convert_sbuf(handle, smb_fname->base_name,
394 static int shadow_copy2_fstat(vfs_handle_struct *handle, files_struct *fsp, SMB_STRUCT_STAT *sbuf)
396 int ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
397 if (ret == 0 && shadow_copy2_match_name(fsp->fsp_name)) {
398 convert_sbuf(handle, fsp->fsp_name, sbuf);
403 static int shadow_copy2_unlink(vfs_handle_struct *handle, const char *fname)
405 SHADOW2_NEXT(UNLINK, (handle, name), int, -1);
408 static int shadow_copy2_chmod(vfs_handle_struct *handle,
409 const char *fname, mode_t mode)
411 SHADOW2_NEXT(CHMOD, (handle, name, mode), int, -1);
414 static int shadow_copy2_chown(vfs_handle_struct *handle,
415 const char *fname, uid_t uid, gid_t gid)
417 SHADOW2_NEXT(CHOWN, (handle, name, uid, gid), int, -1);
420 static int shadow_copy2_chdir(vfs_handle_struct *handle,
423 SHADOW2_NEXT(CHDIR, (handle, name), int, -1);
426 static int shadow_copy2_ntimes(vfs_handle_struct *handle,
427 const char *fname, struct smb_file_time *ft)
429 SHADOW2_NEXT(NTIMES, (handle, name, ft), int, -1);
432 static int shadow_copy2_readlink(vfs_handle_struct *handle,
433 const char *fname, char *buf, size_t bufsiz)
435 SHADOW2_NEXT(READLINK, (handle, name, buf, bufsiz), int, -1);
438 static int shadow_copy2_mknod(vfs_handle_struct *handle,
439 const char *fname, mode_t mode, SMB_DEV_T dev)
441 SHADOW2_NEXT(MKNOD, (handle, name, mode, dev), int, -1);
444 static char *shadow_copy2_realpath(vfs_handle_struct *handle,
445 const char *fname, char *resolved_path)
447 SHADOW2_NEXT(REALPATH, (handle, name, resolved_path), char *, NULL);
450 static const char *shadow_copy2_connectpath(struct vfs_handle_struct *handle,
453 TALLOC_CTX *tmp_ctx = talloc_stackframe();
454 const char *snapdir, *baseoffset, *basedir;
458 if (!shadow_copy2_match_name(fname)) {
459 return handle->conn->connectpath;
462 snapdir = shadow_copy2_find_snapdir(tmp_ctx, handle);
463 if (snapdir == NULL) {
464 DEBUG(2,("no snapdir found for share at %s\n",
465 handle->conn->connectpath));
466 TALLOC_FREE(tmp_ctx);
470 basedir = shadow_copy2_find_basedir(tmp_ctx, handle);
471 if (basedir == NULL) {
472 DEBUG(2,("no basedir found for share at %s\n",
473 handle->conn->connectpath));
474 TALLOC_FREE(tmp_ctx);
478 baselen = strlen(basedir);
479 baseoffset = handle->conn->connectpath + baselen;
481 /* some sanity checks */
482 if (strncmp(basedir, handle->conn->connectpath, baselen) != 0 ||
483 (handle->conn->connectpath[baselen] != 0
484 && handle->conn->connectpath[baselen] != '/')) {
485 DEBUG(0,("shadow_copy2_connectpath: basedir %s is not a "
486 "parent of %s\n", basedir,
487 handle->conn->connectpath));
488 TALLOC_FREE(tmp_ctx);
492 if (*baseoffset == '/') baseoffset++;
494 ret = talloc_asprintf(talloc_tos(), "%s/%.*s/%s",
498 DEBUG(6,("shadow_copy2_connectpath: '%s' -> '%s'\n", fname, ret));
499 TALLOC_FREE(tmp_ctx);
503 static NTSTATUS shadow_copy2_get_nt_acl(vfs_handle_struct *handle,
504 const char *fname, uint32 security_info,
505 struct security_descriptor **ppdesc)
507 SHADOW2_NTSTATUS_NEXT(GET_NT_ACL, (handle, name, security_info, ppdesc), NT_STATUS_ACCESS_DENIED);
510 static int shadow_copy2_mkdir(vfs_handle_struct *handle, const char *fname, mode_t mode)
512 SHADOW2_NEXT(MKDIR, (handle, name, mode), int, -1);
515 static int shadow_copy2_rmdir(vfs_handle_struct *handle, const char *fname)
517 SHADOW2_NEXT(RMDIR, (handle, name), int, -1);
520 static int shadow_copy2_chflags(vfs_handle_struct *handle, const char *fname, int flags)
522 SHADOW2_NEXT(CHFLAGS, (handle, name, flags), int, -1);
525 static ssize_t shadow_copy2_getxattr(vfs_handle_struct *handle,
526 const char *fname, const char *aname, void *value, size_t size)
528 SHADOW2_NEXT(GETXATTR, (handle, name, aname, value, size), ssize_t, -1);
531 static ssize_t shadow_copy2_lgetxattr(vfs_handle_struct *handle,
532 const char *fname, const char *aname, void *value, size_t size)
534 SHADOW2_NEXT(LGETXATTR, (handle, name, aname, value, size), ssize_t, -1);
537 static ssize_t shadow_copy2_listxattr(struct vfs_handle_struct *handle, const char *fname,
538 char *list, size_t size)
540 SHADOW2_NEXT(LISTXATTR, (handle, name, list, size), ssize_t, -1);
543 static int shadow_copy2_removexattr(struct vfs_handle_struct *handle, const char *fname,
546 SHADOW2_NEXT(REMOVEXATTR, (handle, name, aname), int, -1);
549 static int shadow_copy2_lremovexattr(struct vfs_handle_struct *handle, const char *fname,
552 SHADOW2_NEXT(LREMOVEXATTR, (handle, name, aname), int, -1);
555 static int shadow_copy2_setxattr(struct vfs_handle_struct *handle, const char *fname,
556 const char *aname, const void *value, size_t size, int flags)
558 SHADOW2_NEXT(SETXATTR, (handle, name, aname, value, size, flags), int, -1);
561 static int shadow_copy2_lsetxattr(struct vfs_handle_struct *handle, const char *fname,
562 const char *aname, const void *value, size_t size, int flags)
564 SHADOW2_NEXT(LSETXATTR, (handle, name, aname, value, size, flags), int, -1);
567 static int shadow_copy2_chmod_acl(vfs_handle_struct *handle,
568 const char *fname, mode_t mode)
570 /* If the underlying VFS doesn't have ACL support... */
571 if (!handle->vfs_next.ops.chmod_acl) {
575 SHADOW2_NEXT(CHMOD_ACL, (handle, name, mode), int, -1);
578 static int shadow_copy2_get_shadow_copy2_data(vfs_handle_struct *handle,
580 SHADOW_COPY_DATA *shadow_copy2_data,
585 SMB_STRUCT_DIRENT *d;
586 TALLOC_CTX *tmp_ctx = talloc_new(handle->data);
588 snapdir = shadow_copy2_find_snapdir(tmp_ctx, handle);
589 if (snapdir == NULL) {
590 DEBUG(0,("shadow:snapdir not found for %s in get_shadow_copy_data\n",
591 handle->conn->connectpath));
593 talloc_free(tmp_ctx);
597 p = SMB_VFS_NEXT_OPENDIR(handle, snapdir, NULL, 0);
600 DEBUG(2,("shadow_copy2: SMB_VFS_NEXT_OPENDIR() failed for '%s'"
601 " - %s\n", snapdir, strerror(errno)));
602 talloc_free(tmp_ctx);
607 talloc_free(tmp_ctx);
609 shadow_copy2_data->num_volumes = 0;
610 shadow_copy2_data->labels = NULL;
612 while ((d = SMB_VFS_NEXT_READDIR(handle, p, NULL))) {
613 SHADOW_COPY_LABEL *tlabels;
615 /* ignore names not of the right form in the snapshot directory */
616 if (!shadow_copy2_match_name(d->d_name)) {
621 /* the caller doesn't want the labels */
622 shadow_copy2_data->num_volumes++;
626 tlabels = talloc_realloc(shadow_copy2_data->mem_ctx,
627 shadow_copy2_data->labels,
628 SHADOW_COPY_LABEL, shadow_copy2_data->num_volumes+1);
629 if (tlabels == NULL) {
630 DEBUG(0,("shadow_copy2: out of memory\n"));
631 SMB_VFS_NEXT_CLOSEDIR(handle, p);
635 strlcpy(tlabels[shadow_copy2_data->num_volumes], d->d_name, sizeof(*tlabels));
636 shadow_copy2_data->num_volumes++;
637 shadow_copy2_data->labels = tlabels;
640 SMB_VFS_NEXT_CLOSEDIR(handle,p);
644 /* VFS operations structure */
646 static vfs_op_tuple shadow_copy2_ops[] = {
647 {SMB_VFS_OP(shadow_copy2_opendir), SMB_VFS_OP_OPENDIR, SMB_VFS_LAYER_TRANSPARENT},
649 /* directory operations */
650 {SMB_VFS_OP(shadow_copy2_mkdir), SMB_VFS_OP_MKDIR, SMB_VFS_LAYER_TRANSPARENT},
651 {SMB_VFS_OP(shadow_copy2_rmdir), SMB_VFS_OP_RMDIR, SMB_VFS_LAYER_TRANSPARENT},
653 /* xattr and flags operations */
654 {SMB_VFS_OP(shadow_copy2_chflags), SMB_VFS_OP_CHFLAGS, SMB_VFS_LAYER_TRANSPARENT},
655 {SMB_VFS_OP(shadow_copy2_getxattr), SMB_VFS_OP_GETXATTR, SMB_VFS_LAYER_TRANSPARENT},
656 {SMB_VFS_OP(shadow_copy2_lgetxattr), SMB_VFS_OP_LGETXATTR, SMB_VFS_LAYER_TRANSPARENT},
657 {SMB_VFS_OP(shadow_copy2_listxattr), SMB_VFS_OP_LISTXATTR, SMB_VFS_LAYER_TRANSPARENT},
658 {SMB_VFS_OP(shadow_copy2_removexattr), SMB_VFS_OP_REMOVEXATTR, SMB_VFS_LAYER_TRANSPARENT},
659 {SMB_VFS_OP(shadow_copy2_lremovexattr),SMB_VFS_OP_LREMOVEXATTR,SMB_VFS_LAYER_TRANSPARENT},
660 {SMB_VFS_OP(shadow_copy2_setxattr), SMB_VFS_OP_SETXATTR, SMB_VFS_LAYER_TRANSPARENT},
661 {SMB_VFS_OP(shadow_copy2_lsetxattr), SMB_VFS_OP_LSETXATTR, SMB_VFS_LAYER_TRANSPARENT},
663 /* File operations */
664 {SMB_VFS_OP(shadow_copy2_open), SMB_VFS_OP_OPEN, SMB_VFS_LAYER_TRANSPARENT},
665 {SMB_VFS_OP(shadow_copy2_rename), SMB_VFS_OP_RENAME, SMB_VFS_LAYER_TRANSPARENT},
666 {SMB_VFS_OP(shadow_copy2_stat), SMB_VFS_OP_STAT, SMB_VFS_LAYER_TRANSPARENT},
667 {SMB_VFS_OP(shadow_copy2_lstat), SMB_VFS_OP_LSTAT, SMB_VFS_LAYER_TRANSPARENT},
668 {SMB_VFS_OP(shadow_copy2_fstat), SMB_VFS_OP_FSTAT, SMB_VFS_LAYER_TRANSPARENT},
669 {SMB_VFS_OP(shadow_copy2_unlink), SMB_VFS_OP_UNLINK, SMB_VFS_LAYER_TRANSPARENT},
670 {SMB_VFS_OP(shadow_copy2_chmod), SMB_VFS_OP_CHMOD, SMB_VFS_LAYER_TRANSPARENT},
671 {SMB_VFS_OP(shadow_copy2_chown), SMB_VFS_OP_CHOWN, SMB_VFS_LAYER_TRANSPARENT},
672 {SMB_VFS_OP(shadow_copy2_chdir), SMB_VFS_OP_CHDIR, SMB_VFS_LAYER_TRANSPARENT},
673 {SMB_VFS_OP(shadow_copy2_ntimes), SMB_VFS_OP_NTIMES, SMB_VFS_LAYER_TRANSPARENT},
674 {SMB_VFS_OP(shadow_copy2_symlink), SMB_VFS_OP_SYMLINK, SMB_VFS_LAYER_TRANSPARENT},
675 {SMB_VFS_OP(shadow_copy2_readlink), SMB_VFS_OP_READLINK, SMB_VFS_LAYER_TRANSPARENT},
676 {SMB_VFS_OP(shadow_copy2_link), SMB_VFS_OP_LINK, SMB_VFS_LAYER_TRANSPARENT},
677 {SMB_VFS_OP(shadow_copy2_mknod), SMB_VFS_OP_MKNOD, SMB_VFS_LAYER_TRANSPARENT},
678 {SMB_VFS_OP(shadow_copy2_realpath), SMB_VFS_OP_REALPATH, SMB_VFS_LAYER_TRANSPARENT},
679 {SMB_VFS_OP(shadow_copy2_connectpath), SMB_VFS_OP_CONNECTPATH, SMB_VFS_LAYER_OPAQUE},
681 /* NT File ACL operations */
682 {SMB_VFS_OP(shadow_copy2_get_nt_acl), SMB_VFS_OP_GET_NT_ACL, SMB_VFS_LAYER_TRANSPARENT},
684 /* POSIX ACL operations */
685 {SMB_VFS_OP(shadow_copy2_chmod_acl), SMB_VFS_OP_CHMOD_ACL, SMB_VFS_LAYER_TRANSPARENT},
687 /* special shadown copy op */
688 {SMB_VFS_OP(shadow_copy2_get_shadow_copy2_data),
689 SMB_VFS_OP_GET_SHADOW_COPY_DATA,SMB_VFS_LAYER_OPAQUE},
691 {SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
694 NTSTATUS vfs_shadow_copy2_init(void);
695 NTSTATUS vfs_shadow_copy2_init(void)
699 ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "shadow_copy2", shadow_copy2_ops);
701 if (!NT_STATUS_IS_OK(ret))
704 vfs_shadow_copy2_debug_level = debug_add_class("shadow_copy2");
705 if (vfs_shadow_copy2_debug_level == -1) {
706 vfs_shadow_copy2_debug_level = DBGC_VFS;
707 DEBUG(0, ("%s: Couldn't register custom debugging class!\n",
708 "vfs_shadow_copy2_init"));
710 DEBUG(10, ("%s: Debug class number of '%s': %d\n",
711 "vfs_shadow_copy2_init","shadow_copy2",vfs_shadow_copy2_debug_level));