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pyldb: Modernize test suite
[Samba.git] / source3 / modules / vfs_snapper.c
bloba25ae954c6e16acd6354e971713ff0aca15b31e9
1 /*
2 * Module for snapshot IO using snapper
3 *
4 * Copyright (C) David Disseldorp 2012-2014
5 *
6 * Portions taken from vfs_shadow_copy2.c:
7 * Copyright (C) Andrew Tridgell 2007
8 * Copyright (C) Ed Plese 2009
9 * Copyright (C) Volker Lendecke 2011
10 * Copyright (C) Christian Ambach 2011
11 * Copyright (C) Michael Adam 2013
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 3 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, see <http://www.gnu.org/licenses/>.
25 */
26
27 #include <dbus/dbus.h>
28 #ifdef HAVE_LINUX_IOCTL_H
29 #include <linux/ioctl.h>
30 #endif
31 #include <sys/ioctl.h>
32 #include <dirent.h>
33 #include <libgen.h>
34 #include "includes.h"
35 #include "include/ntioctl.h"
36 #include "include/smb.h"
37 #include "system/filesys.h"
38 #include "smbd/smbd.h"
39 #include "lib/util/tevent_ntstatus.h"
40
41 #define SNAPPER_SIG_LIST_SNAPS_RSP "a(uquxussa{ss})"
42 #define SNAPPER_SIG_LIST_CONFS_RSP "a(ssa{ss})"
43 #define SNAPPER_SIG_CREATE_SNAP_RSP "u"
44 #define SNAPPER_SIG_DEL_SNAPS_RSP ""
45 #define SNAPPER_SIG_STRING_DICT "{ss}"
46
47 struct snapper_dict {
48 char *key;
49 char *val;
50 };
51
52 struct snapper_snap {
53 uint32_t id;
54 uint16_t type;
55 uint32_t pre_id;
56 int64_t time;
57 uint32_t creator_uid;
58 char *desc;
59 char *cleanup;
60 uint32_t num_user_data;
61 struct snapper_dict *user_data;
62 };
63
64 struct snapper_conf {
65 char *name;
66 char *mnt;
67 uint32_t num_attrs;
68 struct snapper_dict *attrs;
69 };
70
71 static const struct {
72 const char *snapper_err_str;
73 NTSTATUS status;
74 } snapper_err_map[] = {
75 { "error.no_permissions", NT_STATUS_ACCESS_DENIED },
76 };
77
78 static NTSTATUS snapper_err_ntstatus_map(const char *snapper_err_str)
79 {
80 int i;
81
82 if (snapper_err_str == NULL) {
83 return NT_STATUS_UNSUCCESSFUL;
84 }
85 for (i = 0; i < ARRAY_SIZE(snapper_err_map); i++) {
86 if (!strcmp(snapper_err_map[i].snapper_err_str,
87 snapper_err_str)) {
88 return snapper_err_map[i].status;
89 }
90 }
91 DEBUG(2, ("no explicit mapping for dbus error: %s\n", snapper_err_str));
92
93 return NT_STATUS_UNSUCCESSFUL;
94 }
95
96 /*
97 * Strings are UTF-8. Other characters must be encoded hexadecimal as "\x??".
98 * As a consequence "\" must be encoded as "\\".
99 */
100 static NTSTATUS snapper_dbus_str_encode(TALLOC_CTX *mem_ctx, const char *in_str,
101 char **_out_str)
102 {
103 size_t in_len;
104 char *out_str;
105 int i;
106 int out_off;
107 int out_len;
108
109 if (in_str == NULL) {
110 return NT_STATUS_INVALID_PARAMETER;
111 }
112
113 in_len = strlen(in_str);
114
115 /* output can be max 4 times the length of @in_str, +1 for terminator */
116 out_len = (in_len * 4) + 1;
117
118 out_str = talloc_array(mem_ctx, char, out_len);
119 if (out_str == NULL) {
120 return NT_STATUS_NO_MEMORY;
121 }
122
123 out_off = 0;
124 for (i = 0; i < in_len; i++) {
125 size_t pushed;
126
127 if (in_str[i] == '\\') {
128 pushed = snprintf(out_str + out_off, out_len - out_off,
129 "\\\\");
130 } else if ((unsigned char)in_str[i] > 127) {
131 pushed = snprintf(out_str + out_off, out_len - out_off,
132 "\\x%02x", (unsigned char)in_str[i]);
133 } else {
134 /* regular character */
135 *(out_str + out_off) = in_str[i];
136 pushed = sizeof(char);
137 }
138 if (pushed >= out_len - out_off) {
139 /* truncated, should never happen */
140 talloc_free(out_str);
141 return NT_STATUS_INTERNAL_ERROR;
142 }
143 out_off += pushed;
144 }
145
146 *(out_str + out_off) = '\0';
147 *_out_str = out_str;
148
149 return NT_STATUS_OK;
150 }
151
152 static NTSTATUS snapper_dbus_str_decode(TALLOC_CTX *mem_ctx, const char *in_str,
153 char **_out_str)
154 {
155 size_t in_len;
156 char *out_str;
157 int i;
158 int out_off;
159 int out_len;
160
161 if (in_str == NULL) {
162 return NT_STATUS_INVALID_PARAMETER;
163 }
164
165 in_len = strlen(in_str);
166
167 /* output cannot be larger than input, +1 for terminator */
168 out_len = in_len + 1;
169
170 out_str = talloc_array(mem_ctx, char, out_len);
171 if (out_str == NULL) {
172 return NT_STATUS_NO_MEMORY;
173 }
174
175 out_off = 0;
176 for (i = 0; i < in_len; i++) {
177 int j;
178 char hex_buf[3];
179 unsigned int non_ascii_byte;
180
181 if (in_str[i] != '\\') {
182 out_str[out_off] = in_str[i];
183 out_off++;
184 continue;
185 }
186
187 i++;
188 if (in_str[i] == '\\') {
189 out_str[out_off] = '\\';
190 out_off++;
191 continue;
192 } else if (in_str[i] != 'x') {
193 goto err_invalid_src_encoding;
194 }
195
196 /* non-ASCII, encoded as two hex chars */
197 for (j = 0; j < 2; j++) {
198 i++;
199 if ((in_str[i] == '\0') || !isxdigit(in_str[i])) {
200 goto err_invalid_src_encoding;
201 }
202 hex_buf[j] = in_str[i];
203 }
204 hex_buf[2] = '\0';
205
206 sscanf(hex_buf, "%x", &non_ascii_byte);
207 out_str[out_off] = (unsigned char)non_ascii_byte;
208 out_off++;
209 }
210
211 out_str[out_off] = '\0';
212 *_out_str = out_str;
213
214 return NT_STATUS_OK;
215 err_invalid_src_encoding:
216 DEBUG(0, ("invalid encoding %s\n", in_str));
217 return NT_STATUS_INVALID_PARAMETER;
218 }
219
220 static DBusConnection *snapper_dbus_conn_create(void)
221 {
222 DBusError err;
223 DBusConnection *dconn;
224
225 dbus_error_init(&err);
226
227 /*
228 * Always create a new DBus connection, to ensure snapperd detects the
229 * correct client [E]UID. With dbus_bus_get() it does not!
230 */
231 dconn = dbus_bus_get_private(DBUS_BUS_SYSTEM, &err);
232 if (dbus_error_is_set(&err)) {
233 DEBUG(0, ("dbus connection error: %s\n", err.message));
234 dbus_error_free(&err);
235 }
236 if (dconn == NULL) {
237 return NULL;
238 }
239
240 /* dbus_bus_get_private() sets exit-on-disconnect by default, undo it */
241 dbus_connection_set_exit_on_disconnect(dconn, false);
242
243 return dconn;
244 }
245
246 static void snapper_dbus_conn_destroy(DBusConnection *dconn)
247 {
248 if (dconn == NULL) {
249 DEBUG(2, ("attempt to destroy NULL dbus connection\n"));
250 return;
251 }
252
253 dbus_connection_close(dconn);
254 dbus_connection_unref(dconn);
255 }
256
257 /*
258 * send the message @send_msg over the dbus and wait for a response, return the
259 * responsee via @recv_msg_out.
260 * @send_msg is not freed, dbus_message_unref() must be handled by the caller.
261 */
262 static NTSTATUS snapper_dbus_msg_xchng(DBusConnection *dconn,
263 DBusMessage *send_msg,
264 DBusMessage **recv_msg_out)
265 {
266 DBusPendingCall *pending;
267 DBusMessage *recv_msg;
268
269 /* send message and get a handle for a reply */
270 if (!dbus_connection_send_with_reply(dconn, send_msg, &pending, -1)) {
271 return NT_STATUS_NO_MEMORY;
272 }
273 if (NULL == pending) {
274 DEBUG(0, ("dbus msg send failed\n"));
275 return NT_STATUS_UNSUCCESSFUL;
276 }
277
278 dbus_connection_flush(dconn);
279
280 /* block until we receive a reply */
281 dbus_pending_call_block(pending);
282
283 /* get the reply message */
284 recv_msg = dbus_pending_call_steal_reply(pending);
285 if (recv_msg == NULL) {
286 DEBUG(0, ("Reply Null\n"));
287 return NT_STATUS_UNSUCCESSFUL;
288 }
289 /* free the pending message handle */
290 dbus_pending_call_unref(pending);
291 *recv_msg_out = recv_msg;
292
293 return NT_STATUS_OK;
294 }
295
296 static NTSTATUS snapper_type_check(DBusMessageIter *iter,
297 int expected_type)
298 {
299 int type = dbus_message_iter_get_arg_type(iter);
300 if (type != expected_type) {
301 DEBUG(0, ("got type %d, expecting %d\n",
302 type, expected_type));
303 return NT_STATUS_INVALID_PARAMETER;
304 }
305
306 return NT_STATUS_OK;
307 }
308
309 static NTSTATUS snapper_type_check_get(DBusMessageIter *iter,
310 int expected_type,
311 void *val)
312 {
313 NTSTATUS status;
314 status = snapper_type_check(iter, expected_type);
315 if (!NT_STATUS_IS_OK(status)) {
316 return status;
317 }
318
319 dbus_message_iter_get_basic(iter, val);
320
321 return NT_STATUS_OK;
322 }
323
324 static NTSTATUS snapper_dict_unpack(TALLOC_CTX *mem_ctx,
325 DBusMessageIter *iter,
326 struct snapper_dict *dict_out)
327
328 {
329 NTSTATUS status;
330 DBusMessageIter dct_iter;
331 char *key_encoded;
332 char *val_encoded;
333
334 status = snapper_type_check(iter, DBUS_TYPE_DICT_ENTRY);
335 if (!NT_STATUS_IS_OK(status)) {
336 return status;
337 }
338 dbus_message_iter_recurse(iter, &dct_iter);
339
340 status = snapper_type_check_get(&dct_iter, DBUS_TYPE_STRING,
341 &key_encoded);
342 if (!NT_STATUS_IS_OK(status)) {
343 return status;
344 }
345 status = snapper_dbus_str_decode(mem_ctx, key_encoded, &dict_out->key);
346 if (!NT_STATUS_IS_OK(status)) {
347 return status;
348 }
349
350 dbus_message_iter_next(&dct_iter);
351 status = snapper_type_check_get(&dct_iter, DBUS_TYPE_STRING,
352 &val_encoded);
353 if (!NT_STATUS_IS_OK(status)) {
354 talloc_free(dict_out->key);
355 return status;
356 }
357 status = snapper_dbus_str_decode(mem_ctx, val_encoded, &dict_out->val);
358 if (!NT_STATUS_IS_OK(status)) {
359 talloc_free(dict_out->key);
360 return status;
361 }
362
363 return NT_STATUS_OK;
364 }
365
366 static void snapper_dict_array_print(uint32_t num_dicts,
367 struct snapper_dict *dicts)
368 {
369 int i;
370
371 for (i = 0; i < num_dicts; i++) {
372 DEBUG(10, ("dict (key: %s, val: %s)\n",
373 dicts[i].key, dicts[i].val));
374 }
375 }
376
377 static NTSTATUS snapper_dict_array_unpack(TALLOC_CTX *mem_ctx,
378 DBusMessageIter *iter,
379 uint32_t *num_dicts_out,
380 struct snapper_dict **dicts_out)
381 {
382 NTSTATUS status;
383 DBusMessageIter array_iter;
384 uint32_t num_dicts;
385 struct snapper_dict *dicts = NULL;
386
387 status = snapper_type_check(iter, DBUS_TYPE_ARRAY);
388 if (!NT_STATUS_IS_OK(status)) {
389 return status;
390 }
391 dbus_message_iter_recurse(iter, &array_iter);
392
393 num_dicts = 0;
394 while (dbus_message_iter_get_arg_type(&array_iter)
395 != DBUS_TYPE_INVALID) {
396 num_dicts++;
397 dicts = talloc_realloc(mem_ctx, dicts, struct snapper_dict,
398 num_dicts);
399 if (dicts == NULL)
400 abort();
401
402 status = snapper_dict_unpack(mem_ctx, &array_iter,
403 &dicts[num_dicts - 1]);
404 if (!NT_STATUS_IS_OK(status)) {
405 talloc_free(dicts);
406 return status;
407 }
408 dbus_message_iter_next(&array_iter);
409 }
410
411 *num_dicts_out = num_dicts;
412 *dicts_out = dicts;
413
414 return NT_STATUS_OK;
415 }
416
417 static NTSTATUS snapper_list_confs_pack(DBusMessage **req_msg_out)
418 {
419 DBusMessage *msg;
420
421 msg = dbus_message_new_method_call("org.opensuse.Snapper",
422 "/org/opensuse/Snapper",
423 "org.opensuse.Snapper",
424 "ListConfigs");
425 if (msg == NULL) {
426 DEBUG(0, ("null msg\n"));
427 return NT_STATUS_NO_MEMORY;
428 }
429
430 /* no arguments to append */
431 *req_msg_out = msg;
432
433 return NT_STATUS_OK;
434 }
435
436 static NTSTATUS snapper_conf_unpack(TALLOC_CTX *mem_ctx,
437 DBusMessageIter *iter,
438 struct snapper_conf *conf_out)
439 {
440 NTSTATUS status;
441 DBusMessageIter st_iter;
442 char *name_encoded;
443 char *mnt_encoded;
444
445 status = snapper_type_check(iter, DBUS_TYPE_STRUCT);
446 if (!NT_STATUS_IS_OK(status)) {
447 return status;
448 }
449 dbus_message_iter_recurse(iter, &st_iter);
450
451 status = snapper_type_check_get(&st_iter, DBUS_TYPE_STRING,
452 &name_encoded);
453 if (!NT_STATUS_IS_OK(status)) {
454 return status;
455 }
456
457 status = snapper_dbus_str_decode(mem_ctx, name_encoded,
458 &conf_out->name);
459 if (!NT_STATUS_IS_OK(status)) {
460 return status;
461 }
462
463 dbus_message_iter_next(&st_iter);
464 status = snapper_type_check_get(&st_iter, DBUS_TYPE_STRING,
465 &mnt_encoded);
466 if (!NT_STATUS_IS_OK(status)) {
467 talloc_free(conf_out->name);
468 return status;
469 }
470
471 status = snapper_dbus_str_decode(mem_ctx, mnt_encoded,
472 &conf_out->mnt);
473 if (!NT_STATUS_IS_OK(status)) {
474 talloc_free(conf_out->name);
475 return status;
476 }
477
478 dbus_message_iter_next(&st_iter);
479 status = snapper_dict_array_unpack(mem_ctx, &st_iter,
480 &conf_out->num_attrs,
481 &conf_out->attrs);
482 if (!NT_STATUS_IS_OK(status)) {
483 talloc_free(conf_out->mnt);
484 talloc_free(conf_out->name);
485 return status;
486 }
487
488 return NT_STATUS_OK;
489 }
490
491 static struct snapper_conf *snapper_conf_array_base_find(int32_t num_confs,
492 struct snapper_conf *confs,
493 const char *base)
494 {
495 int i;
496
497 for (i = 0; i < num_confs; i++) {
498 if (strcmp(confs[i].mnt, base) == 0) {
499 DEBUG(5, ("found snapper conf %s for path %s\n",
500 confs[i].name, base));
501 return &confs[i];
502 }
503 }
504 DEBUG(5, ("config for base %s not found\n", base));
505
506 return NULL;
507 }
508
509 static void snapper_conf_array_print(int32_t num_confs,
510 struct snapper_conf *confs)
511 {
512 int i;
513
514 for (i = 0; i < num_confs; i++) {
515 DEBUG(10, ("name: %s, mnt: %s\n",
516 confs[i].name, confs[i].mnt));
517 snapper_dict_array_print(confs[i].num_attrs, confs[i].attrs);
518 }
519 }
520
521 static NTSTATUS snapper_conf_array_unpack(TALLOC_CTX *mem_ctx,
522 DBusMessageIter *iter,
523 uint32_t *num_confs_out,
524 struct snapper_conf **confs_out)
525 {
526 uint32_t num_confs;
527 NTSTATUS status;
528 struct snapper_conf *confs = NULL;
529 DBusMessageIter array_iter;
530
531
532 status = snapper_type_check(iter, DBUS_TYPE_ARRAY);
533 if (!NT_STATUS_IS_OK(status)) {
534 return status;
535 }
536 dbus_message_iter_recurse(iter, &array_iter);
537
538 num_confs = 0;
539 while (dbus_message_iter_get_arg_type(&array_iter)
540 != DBUS_TYPE_INVALID) {
541 num_confs++;
542 confs = talloc_realloc(mem_ctx, confs, struct snapper_conf,
543 num_confs);
544 if (confs == NULL)
545 abort();
546
547 status = snapper_conf_unpack(confs, &array_iter,
548 &confs[num_confs - 1]);
549 if (!NT_STATUS_IS_OK(status)) {
550 talloc_free(confs);
551 return status;
552 }
553 dbus_message_iter_next(&array_iter);
554 }
555
556 *num_confs_out = num_confs;
557 *confs_out = confs;
558
559 return NT_STATUS_OK;
560 }
561
562 static NTSTATUS snapper_list_confs_unpack(TALLOC_CTX *mem_ctx,
563 DBusConnection *dconn,
564 DBusMessage *rsp_msg,
565 uint32_t *num_confs_out,
566 struct snapper_conf **confs_out)
567 {
568 NTSTATUS status;
569 DBusMessageIter iter;
570 int msg_type;
571 uint32_t num_confs;
572 struct snapper_conf *confs;
573 const char *sig;
574
575 msg_type = dbus_message_get_type(rsp_msg);
576 if (msg_type == DBUS_MESSAGE_TYPE_ERROR) {
577 const char *err_str = dbus_message_get_error_name(rsp_msg);
578 DEBUG(0, ("list_confs error response: %s\n", err_str));
579 return snapper_err_ntstatus_map(err_str);
580 }
581
582 if (msg_type != DBUS_MESSAGE_TYPE_METHOD_RETURN) {
583 DEBUG(0, ("unexpected list_confs ret type: %d\n",
584 msg_type));
585 return NT_STATUS_INVALID_PARAMETER;
586 }
587
588 sig = dbus_message_get_signature(rsp_msg);
589 if ((sig == NULL)
590 || (strcmp(sig, SNAPPER_SIG_LIST_CONFS_RSP) != 0)) {
591 DEBUG(0, ("bad list confs response sig: %s, expected: %s\n",
592 (sig ? sig : "NULL"), SNAPPER_SIG_LIST_CONFS_RSP));
593 return NT_STATUS_INVALID_PARAMETER;
594 }
595
596 if (!dbus_message_iter_init(rsp_msg, &iter)) {
597 /* FIXME return empty? */
598 DEBUG(0, ("Message has no arguments!\n"));
599 return NT_STATUS_INVALID_PARAMETER;
600 }
601
602 status = snapper_conf_array_unpack(mem_ctx, &iter, &num_confs, &confs);
603 if (!NT_STATUS_IS_OK(status)) {
604 DEBUG(0, ("failed to unpack conf array\n"));
605 return status;
606 }
607
608 snapper_conf_array_print(num_confs, confs);
609
610 *num_confs_out = num_confs;
611 *confs_out = confs;
612
613 return NT_STATUS_OK;
614 }
615
616 static NTSTATUS snapper_list_snaps_pack(TALLOC_CTX *mem_ctx,
617 char *snapper_conf,
618 DBusMessage **req_msg_out)
619 {
620 DBusMessage *msg;
621 DBusMessageIter args;
622 char *conf_encoded;
623 NTSTATUS status;
624
625 msg = dbus_message_new_method_call("org.opensuse.Snapper", /* target for the method call */
626 "/org/opensuse/Snapper", /* object to call on */
627 "org.opensuse.Snapper", /* interface to call on */
628 "ListSnapshots"); /* method name */
629 if (msg == NULL) {
630 DEBUG(0, ("failed to create list snaps message\n"));
631 return NT_STATUS_NO_MEMORY;
632 }
633
634 status = snapper_dbus_str_encode(mem_ctx, snapper_conf, &conf_encoded);
635 if (!NT_STATUS_IS_OK(status)) {
636 dbus_message_unref(msg);
637 return status;
638 }
639
640 /* append arguments */
641 dbus_message_iter_init_append(msg, &args);
642 if (!dbus_message_iter_append_basic(&args, DBUS_TYPE_STRING,
643 &conf_encoded)) {
644 talloc_free(conf_encoded);
645 dbus_message_unref(msg);
646 return NT_STATUS_NO_MEMORY;
647 }
648
649 *req_msg_out = msg;
650
651 return NT_STATUS_OK;
652 }
653
654 static NTSTATUS snapper_snap_struct_unpack(TALLOC_CTX *mem_ctx,
655 DBusMessageIter *iter,
656 struct snapper_snap *snap_out)
657 {
658 NTSTATUS status;
659 DBusMessageIter st_iter;
660 char *desc_encoded;
661 char *cleanup_encoded;
662
663 status = snapper_type_check(iter, DBUS_TYPE_STRUCT);
664 if (!NT_STATUS_IS_OK(status)) {
665 return status;
666 }
667 dbus_message_iter_recurse(iter, &st_iter);
668
669 status = snapper_type_check_get(&st_iter, DBUS_TYPE_UINT32,
670 &snap_out->id);
671 if (!NT_STATUS_IS_OK(status)) {
672 return status;
673 }
674
675 dbus_message_iter_next(&st_iter);
676 status = snapper_type_check_get(&st_iter, DBUS_TYPE_UINT16,
677 &snap_out->type);
678 if (!NT_STATUS_IS_OK(status)) {
679 return status;
680 }
681
682 dbus_message_iter_next(&st_iter);
683 status = snapper_type_check_get(&st_iter, DBUS_TYPE_UINT32,
684 &snap_out->pre_id);
685 if (!NT_STATUS_IS_OK(status)) {
686 return status;
687 }
688
689 dbus_message_iter_next(&st_iter);
690 status = snapper_type_check_get(&st_iter, DBUS_TYPE_INT64,
691 &snap_out->time);
692 if (!NT_STATUS_IS_OK(status)) {
693 return status;
694 }
695
696 dbus_message_iter_next(&st_iter);
697 status = snapper_type_check_get(&st_iter, DBUS_TYPE_UINT32,
698 &snap_out->creator_uid);
699 if (!NT_STATUS_IS_OK(status)) {
700 return status;
701 }
702
703 dbus_message_iter_next(&st_iter);
704 status = snapper_type_check_get(&st_iter, DBUS_TYPE_STRING,
705 &desc_encoded);
706 if (!NT_STATUS_IS_OK(status)) {
707 return status;
708 }
709
710 status = snapper_dbus_str_decode(mem_ctx, desc_encoded,
711 &snap_out->desc);
712 if (!NT_STATUS_IS_OK(status)) {
713 return status;
714 }
715
716 dbus_message_iter_next(&st_iter);
717 status = snapper_type_check_get(&st_iter, DBUS_TYPE_STRING,
718 &cleanup_encoded);
719 if (!NT_STATUS_IS_OK(status)) {
720 talloc_free(snap_out->desc);
721 return status;
722 }
723
724 status = snapper_dbus_str_decode(mem_ctx, cleanup_encoded,
725 &snap_out->cleanup);
726 if (!NT_STATUS_IS_OK(status)) {
727 talloc_free(snap_out->desc);
728 return status;
729 }
730
731 dbus_message_iter_next(&st_iter);
732 status = snapper_dict_array_unpack(mem_ctx, &st_iter,
733 &snap_out->num_user_data,
734 &snap_out->user_data);
735 if (!NT_STATUS_IS_OK(status)) {
736 talloc_free(snap_out->cleanup);
737 talloc_free(snap_out->desc);
738 return status;
739 }
740
741 return NT_STATUS_OK;
742 }
743
744 static void snapper_snap_array_print(int32_t num_snaps,
745 struct snapper_snap *snaps)
746 {
747 int i;
748
749 for (i = 0; i < num_snaps; i++) {
750 DEBUG(10, ("id: %u, "
751 "type: %u, "
752 "pre_id: %u, "
753 "time: %ld, "
754 "creator_uid: %u, "
755 "desc: %s, "
756 "cleanup: %s\n",
757 (unsigned int)snaps[i].id,
758 (unsigned int)snaps[i].type,
759 (unsigned int)snaps[i].pre_id,
760 (long int)snaps[i].time,
761 (unsigned int)snaps[i].creator_uid,
762 snaps[i].desc,
763 snaps[i].cleanup));
764 snapper_dict_array_print(snaps[i].num_user_data,
765 snaps[i].user_data);
766 }
767 }
768
769 static NTSTATUS snapper_snap_array_unpack(TALLOC_CTX *mem_ctx,
770 DBusMessageIter *iter,
771 uint32_t *num_snaps_out,
772 struct snapper_snap **snaps_out)
773 {
774 uint32_t num_snaps;
775 NTSTATUS status;
776 struct snapper_snap *snaps = NULL;
777 DBusMessageIter array_iter;
778
779
780 status = snapper_type_check(iter, DBUS_TYPE_ARRAY);
781 if (!NT_STATUS_IS_OK(status)) {
782 return status;
783 }
784 dbus_message_iter_recurse(iter, &array_iter);
785
786 num_snaps = 0;
787 while (dbus_message_iter_get_arg_type(&array_iter)
788 != DBUS_TYPE_INVALID) {
789 num_snaps++;
790 snaps = talloc_realloc(mem_ctx, snaps, struct snapper_snap,
791 num_snaps);
792 if (snaps == NULL)
793 abort();
794
795 status = snapper_snap_struct_unpack(snaps, &array_iter,
796 &snaps[num_snaps - 1]);
797 if (!NT_STATUS_IS_OK(status)) {
798 talloc_free(snaps);
799 return status;
800 }
801 dbus_message_iter_next(&array_iter);
802 }
803
804 *num_snaps_out = num_snaps;
805 *snaps_out = snaps;
806
807 return NT_STATUS_OK;
808 }
809
810 static NTSTATUS snapper_list_snaps_unpack(TALLOC_CTX *mem_ctx,
811 DBusMessage *rsp_msg,
812 uint32_t *num_snaps_out,
813 struct snapper_snap **snaps_out)
814 {
815 NTSTATUS status;
816 DBusMessageIter iter;
817 int msg_type;
818 uint32_t num_snaps;
819 struct snapper_snap *snaps;
820 const char *sig;
821
822 msg_type = dbus_message_get_type(rsp_msg);
823 if (msg_type == DBUS_MESSAGE_TYPE_ERROR) {
824 const char *err_str = dbus_message_get_error_name(rsp_msg);
825 DEBUG(0, ("list_snaps error response: %s\n", err_str));
826 return snapper_err_ntstatus_map(err_str);
827 }
828
829 if (msg_type != DBUS_MESSAGE_TYPE_METHOD_RETURN) {
830 DEBUG(0,("unexpected list_snaps ret type: %d\n",
831 msg_type));
832 return NT_STATUS_INVALID_PARAMETER;
833 }
834
835 sig = dbus_message_get_signature(rsp_msg);
836 if ((sig == NULL)
837 || (strcmp(sig, SNAPPER_SIG_LIST_SNAPS_RSP) != 0)) {
838 DEBUG(0, ("bad list snaps response sig: %s, "
839 "expected: %s\n",
840 (sig ? sig : "NULL"),
841 SNAPPER_SIG_LIST_SNAPS_RSP));
842 return NT_STATUS_INVALID_PARAMETER;
843 }
844
845 /* read the parameters */
846 if (!dbus_message_iter_init(rsp_msg, &iter)) {
847 DEBUG(0, ("response has no arguments!\n"));
848 return NT_STATUS_INVALID_PARAMETER;
849 }
850
851 status = snapper_snap_array_unpack(mem_ctx, &iter, &num_snaps, &snaps);
852 if (!NT_STATUS_IS_OK(status)) {
853 DEBUG(0, ("failed to unpack snap array\n"));
854 return NT_STATUS_INVALID_PARAMETER;
855 }
856
857 snapper_snap_array_print(num_snaps, snaps);
858
859 *num_snaps_out = num_snaps;
860 *snaps_out = snaps;
861
862 return NT_STATUS_OK;
863 }
864
865 static NTSTATUS snapper_create_snap_pack(TALLOC_CTX *mem_ctx,
866 const char *snapper_conf,
867 const char *desc,
868 uint32_t num_user_data,
869 struct snapper_dict *user_data,
870 DBusMessage **req_msg_out)
871 {
872 DBusMessage *msg;
873 DBusMessageIter args;
874 DBusMessageIter array_iter;
875 DBusMessageIter struct_iter;
876 const char *empty = "";
877 char *str_encoded;
878 uint32_t i;
879 bool ok;
880 TALLOC_CTX *enc_ctx;
881 NTSTATUS status;
882
883 DEBUG(10, ("CreateSingleSnapshot: %s, %s, %s, num user %u\n",
884 snapper_conf, desc, empty, num_user_data));
885
886 enc_ctx = talloc_new(mem_ctx);
887 if (enc_ctx == NULL) {
888 return NT_STATUS_NO_MEMORY;
889 }
890
891 msg = dbus_message_new_method_call("org.opensuse.Snapper",
892 "/org/opensuse/Snapper",
893 "org.opensuse.Snapper",
894 "CreateSingleSnapshot");
895 if (msg == NULL) {
896 DEBUG(0, ("failed to create req msg\n"));
897 talloc_free(enc_ctx);
898 return NT_STATUS_NO_MEMORY;
899 }
900
901 status = snapper_dbus_str_encode(enc_ctx, snapper_conf, &str_encoded);
902 if (!NT_STATUS_IS_OK(status)) {
903 dbus_message_unref(msg);
904 talloc_free(enc_ctx);
905 return status;
906 }
907
908 /* append arguments */
909 dbus_message_iter_init_append(msg, &args);
910 ok = dbus_message_iter_append_basic(&args, DBUS_TYPE_STRING,
911 &str_encoded);
912 if (!ok) {
913 dbus_message_unref(msg);
914 talloc_free(enc_ctx);
915 return NT_STATUS_NO_MEMORY;
916 }
917
918 status = snapper_dbus_str_encode(enc_ctx, desc, &str_encoded);
919 if (!NT_STATUS_IS_OK(status)) {
920 dbus_message_unref(msg);
921 talloc_free(enc_ctx);
922 return status;
923 }
924
925 ok = dbus_message_iter_append_basic(&args, DBUS_TYPE_STRING,
926 &str_encoded);
927 if (!ok) {
928 dbus_message_unref(msg);
929 talloc_free(enc_ctx);
930 return NT_STATUS_NO_MEMORY;
931 }
932
933 /* cleanup - no need to encode empty string */
934 ok = dbus_message_iter_append_basic(&args, DBUS_TYPE_STRING,
935 &empty);
936 if (!ok) {
937 dbus_message_unref(msg);
938 talloc_free(enc_ctx);
939 return NT_STATUS_NO_MEMORY;
940 }
941
942 ok = dbus_message_iter_open_container(&args, DBUS_TYPE_ARRAY,
943 SNAPPER_SIG_STRING_DICT,
944 &array_iter);
945 if (!ok) {
946 dbus_message_unref(msg);
947 talloc_free(enc_ctx);
948 return NT_STATUS_NO_MEMORY;
949 }
950
951 for (i = 0; i < num_user_data; i++) {
952 ok = dbus_message_iter_open_container(&array_iter,
953 DBUS_TYPE_DICT_ENTRY,
954 NULL, &struct_iter);
955 if (!ok) {
956 dbus_message_unref(msg);
957 talloc_free(enc_ctx);
958 return NT_STATUS_NO_MEMORY;
959 }
960
961 status = snapper_dbus_str_encode(enc_ctx, user_data[i].key,
962 &str_encoded);
963 if (!NT_STATUS_IS_OK(status)) {
964 dbus_message_unref(msg);
965 talloc_free(enc_ctx);
966 return status;
967 }
968
969 ok = dbus_message_iter_append_basic(&struct_iter,
970 DBUS_TYPE_STRING,
971 &str_encoded);
972 if (!ok) {
973 dbus_message_unref(msg);
974 talloc_free(enc_ctx);
975 return NT_STATUS_NO_MEMORY;
976 }
977
978 status = snapper_dbus_str_encode(enc_ctx, user_data[i].val,
979 &str_encoded);
980 if (!NT_STATUS_IS_OK(status)) {
981 dbus_message_unref(msg);
982 talloc_free(enc_ctx);
983 return status;
984 }
985
986 ok = dbus_message_iter_append_basic(&struct_iter,
987 DBUS_TYPE_STRING,
988 &str_encoded);
989 if (!ok) {
990 dbus_message_unref(msg);
991 talloc_free(enc_ctx);
992 return NT_STATUS_NO_MEMORY;
993 }
994
995 ok = dbus_message_iter_close_container(&array_iter, &struct_iter);
996 if (!ok) {
997 dbus_message_unref(msg);
998 talloc_free(enc_ctx);
999 return NT_STATUS_NO_MEMORY;
1000 }
1001 }
1002
1003 ok = dbus_message_iter_close_container(&args, &array_iter);
1004 if (!ok) {
1005 dbus_message_unref(msg);
1006 talloc_free(enc_ctx);
1007 return NT_STATUS_NO_MEMORY;
1008 }
1009
1010 *req_msg_out = msg;
1011
1012 return NT_STATUS_OK;
1013 }
1014
1015 static NTSTATUS snapper_create_snap_unpack(DBusConnection *conn,
1016 DBusMessage *rsp_msg,
1017 uint32_t *snap_id_out)
1018 {
1019 NTSTATUS status;
1020 DBusMessageIter iter;
1021 int msg_type;
1022 const char *sig;
1023 uint32_t snap_id;
1024
1025 msg_type = dbus_message_get_type(rsp_msg);
1026 if (msg_type == DBUS_MESSAGE_TYPE_ERROR) {
1027 const char *err_str = dbus_message_get_error_name(rsp_msg);
1028 DEBUG(0, ("create snap error response: %s, euid %d egid %d\n",
1029 err_str, geteuid(), getegid()));
1030 return snapper_err_ntstatus_map(err_str);
1031 }
1032
1033 if (msg_type != DBUS_MESSAGE_TYPE_METHOD_RETURN) {
1034 DEBUG(0, ("unexpected create snap ret type: %d\n",
1035 msg_type));
1036 return NT_STATUS_INVALID_PARAMETER;
1037 }
1038
1039 sig = dbus_message_get_signature(rsp_msg);
1040 if ((sig == NULL)
1041 || (strcmp(sig, SNAPPER_SIG_CREATE_SNAP_RSP) != 0)) {
1042 DEBUG(0, ("bad create snap response sig: %s, expected: %s\n",
1043 (sig ? sig : "NULL"), SNAPPER_SIG_CREATE_SNAP_RSP));
1044 return NT_STATUS_INVALID_PARAMETER;
1045 }
1046
1047 /* read the parameters */
1048 if (!dbus_message_iter_init(rsp_msg, &iter)) {
1049 DEBUG(0, ("response has no arguments!\n"));
1050 return NT_STATUS_INVALID_PARAMETER;
1051 }
1052
1053 status = snapper_type_check_get(&iter, DBUS_TYPE_UINT32, &snap_id);
1054 if (!NT_STATUS_IS_OK(status)) {
1055 return status;
1056 }
1057 *snap_id_out = snap_id;
1058
1059 return NT_STATUS_OK;
1060 }
1061
1062 static NTSTATUS snapper_del_snap_pack(TALLOC_CTX *mem_ctx,
1063 const char *snapper_conf,
1064 uint32_t snap_id,
1065 DBusMessage **req_msg_out)
1066 {
1067 DBusMessage *msg;
1068 DBusMessageIter args;
1069 DBusMessageIter array_iter;
1070 char *conf_encoded;
1071 bool ok;
1072 NTSTATUS status;
1073
1074 msg = dbus_message_new_method_call("org.opensuse.Snapper",
1075 "/org/opensuse/Snapper",
1076 "org.opensuse.Snapper",
1077 "DeleteSnapshots");
1078 if (msg == NULL) {
1079 DEBUG(0, ("failed to create req msg\n"));
1080 return NT_STATUS_NO_MEMORY;
1081 }
1082
1083 status = snapper_dbus_str_encode(mem_ctx, snapper_conf, &conf_encoded);
1084 if (!NT_STATUS_IS_OK(status)) {
1085 dbus_message_unref(msg);
1086 return status;
1087 }
1088
1089 /* append arguments */
1090 dbus_message_iter_init_append(msg, &args);
1091 ok = dbus_message_iter_append_basic(&args, DBUS_TYPE_STRING,
1092 &conf_encoded);
1093 if (!ok) {
1094 talloc_free(conf_encoded);
1095 dbus_message_unref(msg);
1096 return NT_STATUS_NO_MEMORY;
1097 }
1098
1099 ok = dbus_message_iter_open_container(&args, DBUS_TYPE_ARRAY,
1100 DBUS_TYPE_UINT32_AS_STRING,
1101 &array_iter);
1102 if (!ok) {
1103 talloc_free(conf_encoded);
1104 dbus_message_unref(msg);
1105 return NT_STATUS_NO_MEMORY;
1106 }
1107
1108 ok = dbus_message_iter_append_basic(&array_iter,
1109 DBUS_TYPE_UINT32,
1110 &snap_id);
1111 if (!ok) {
1112 talloc_free(conf_encoded);
1113 dbus_message_unref(msg);
1114 return NT_STATUS_NO_MEMORY;
1115 }
1116
1117 dbus_message_iter_close_container(&args, &array_iter);
1118 *req_msg_out = msg;
1119
1120 return NT_STATUS_OK;
1121 }
1122
1123 static NTSTATUS snapper_del_snap_unpack(DBusConnection *conn,
1124 DBusMessage *rsp_msg)
1125 {
1126 int msg_type;
1127 const char *sig;
1128
1129 msg_type = dbus_message_get_type(rsp_msg);
1130 if (msg_type == DBUS_MESSAGE_TYPE_ERROR) {
1131 const char *err_str = dbus_message_get_error_name(rsp_msg);
1132 DEBUG(0, ("del snap error response: %s\n", err_str));
1133 return snapper_err_ntstatus_map(err_str);
1134 }
1135
1136 if (msg_type != DBUS_MESSAGE_TYPE_METHOD_RETURN) {
1137 DEBUG(0, ("unexpected del snap ret type: %d\n",
1138 msg_type));
1139 return NT_STATUS_INVALID_PARAMETER;
1140 }
1141
1142 sig = dbus_message_get_signature(rsp_msg);
1143 if ((sig == NULL)
1144 || (strcmp(sig, SNAPPER_SIG_DEL_SNAPS_RSP) != 0)) {
1145 DEBUG(0, ("bad create snap response sig: %s, expected: %s\n",
1146 (sig ? sig : "NULL"), SNAPPER_SIG_DEL_SNAPS_RSP));
1147 return NT_STATUS_INVALID_PARAMETER;
1148 }
1149
1150 /* no parameters in response */
1151
1152 return NT_STATUS_OK;
1153 }
1154
1155 static NTSTATUS snapper_list_snaps_at_time_pack(TALLOC_CTX *mem_ctx,
1156 const char *snapper_conf,
1157 time_t time_lower,
1158 time_t time_upper,
1159 DBusMessage **req_msg_out)
1160 {
1161 DBusMessage *msg;
1162 DBusMessageIter args;
1163 char *conf_encoded;
1164 NTSTATUS status;
1165
1166 msg = dbus_message_new_method_call("org.opensuse.Snapper",
1167 "/org/opensuse/Snapper",
1168 "org.opensuse.Snapper",
1169 "ListSnapshotsAtTime");
1170 if (msg == NULL) {
1171 DEBUG(0, ("failed to create list snaps message\n"));
1172 return NT_STATUS_NO_MEMORY;
1173 }
1174
1175 status = snapper_dbus_str_encode(mem_ctx, snapper_conf, &conf_encoded);
1176 if (!NT_STATUS_IS_OK(status)) {
1177 dbus_message_unref(msg);
1178 return status;
1179 }
1180
1181 dbus_message_iter_init_append(msg, &args);
1182 if (!dbus_message_iter_append_basic(&args, DBUS_TYPE_STRING,
1183 &conf_encoded)) {
1184 talloc_free(conf_encoded);
1185 dbus_message_unref(msg);
1186 return NT_STATUS_NO_MEMORY;
1187 }
1188
1189 if (!dbus_message_iter_append_basic(&args, DBUS_TYPE_INT64,
1190 &time_lower)) {
1191 talloc_free(conf_encoded);
1192 dbus_message_unref(msg);
1193 return NT_STATUS_NO_MEMORY;
1194 }
1195
1196 if (!dbus_message_iter_append_basic(&args, DBUS_TYPE_INT64,
1197 &time_upper)) {
1198 talloc_free(conf_encoded);
1199 dbus_message_unref(msg);
1200 return NT_STATUS_NO_MEMORY;
1201 }
1202
1203 *req_msg_out = msg;
1204
1205 return NT_STATUS_OK;
1206 }
1207 /* no snapper_list_snaps_at_time_unpack, use snapper_list_snaps_unpack */
1208
1209 /*
1210 * Determine the snapper snapshot id given a path.
1211 * Ideally this should be determined via a lookup.
1212 */
1213 static NTSTATUS snapper_snap_path_to_id(TALLOC_CTX *mem_ctx,
1214 const char *snap_path,
1215 uint32_t *snap_id_out)
1216 {
1217 char *path_dup;
1218 char *str_idx;
1219 char *str_end;
1220 uint32_t snap_id;
1221
1222 path_dup = talloc_strdup(mem_ctx, snap_path);
1223 if (path_dup == NULL) {
1224 return NT_STATUS_NO_MEMORY;
1225 }
1226
1227 /* trim trailing '/' */
1228 str_idx = path_dup + strlen(path_dup) - 1;
1229 while (*str_idx == '/') {
1230 *str_idx = '\0';
1231 str_idx--;
1232 }
1233
1234 str_idx = strrchr(path_dup, '/');
1235 if ((str_idx == NULL)
1236 || (strcmp(str_idx + 1, "snapshot") != 0)) {
1237 talloc_free(path_dup);
1238 return NT_STATUS_INVALID_PARAMETER;
1239 }
1240
1241 while (*str_idx == '/') {
1242 *str_idx = '\0';
1243 str_idx--;
1244 }
1245
1246 str_idx = strrchr(path_dup, '/');
1247 if (str_idx == NULL) {
1248 talloc_free(path_dup);
1249 return NT_STATUS_INVALID_PARAMETER;
1250 }
1251
1252 str_idx++;
1253 snap_id = strtoul(str_idx, &str_end, 10);
1254 if (str_idx == str_end) {
1255 talloc_free(path_dup);
1256 return NT_STATUS_INVALID_PARAMETER;
1257 }
1258
1259 talloc_free(path_dup);
1260 *snap_id_out = snap_id;
1261 return NT_STATUS_OK;
1262 }
1263
1264 /*
1265 * Determine the snapper snapshot path given an id and base.
1266 * Ideally this should be determined via a lookup.
1267 */
1268 static NTSTATUS snapper_snap_id_to_path(TALLOC_CTX *mem_ctx,
1269 const char *base_path,
1270 uint32_t snap_id,
1271 char **snap_path_out)
1272 {
1273 char *snap_path;
1274
1275 snap_path = talloc_asprintf(mem_ctx, "%s/.snapshots/%u/snapshot",
1276 base_path, snap_id);
1277 if (snap_path == NULL) {
1278 return NT_STATUS_NO_MEMORY;
1279 }
1280
1281 *snap_path_out = snap_path;
1282 return NT_STATUS_OK;
1283 }
1284
1285 static NTSTATUS snapper_get_conf_call(TALLOC_CTX *mem_ctx,
1286 DBusConnection *dconn,
1287 const char *path,
1288 char **conf_name_out,
1289 char **base_path_out)
1290 {
1291 NTSTATUS status;
1292 DBusMessage *req_msg;
1293 DBusMessage *rsp_msg;
1294 uint32_t num_confs = 0;
1295 struct snapper_conf *confs = NULL;
1296 struct snapper_conf *conf;
1297 char *conf_name;
1298 char *base_path;
1299
1300 status = snapper_list_confs_pack(&req_msg);
1301 if (!NT_STATUS_IS_OK(status)) {
1302 goto err_out;
1303 }
1304
1305 status = snapper_dbus_msg_xchng(dconn, req_msg, &rsp_msg);
1306 if (!NT_STATUS_IS_OK(status)) {
1307 goto err_req_free;
1308 }
1309
1310 status = snapper_list_confs_unpack(mem_ctx, dconn, rsp_msg,
1311 &num_confs, &confs);
1312 if (!NT_STATUS_IS_OK(status)) {
1313 goto err_rsp_free;
1314 }
1315
1316 /*
1317 * for now we only support shares where the path directly corresponds
1318 * to a snapper configuration.
1319 */
1320 conf = snapper_conf_array_base_find(num_confs, confs,
1321 path);
1322 if (conf == NULL) {
1323 status = NT_STATUS_NOT_SUPPORTED;
1324 goto err_array_free;
1325 }
1326
1327 conf_name = talloc_strdup(mem_ctx, conf->name);
1328 if (conf_name == NULL) {
1329 status = NT_STATUS_NO_MEMORY;
1330 goto err_array_free;
1331 }
1332 base_path = talloc_strdup(mem_ctx, conf->mnt);
1333 if (base_path == NULL) {
1334 status = NT_STATUS_NO_MEMORY;
1335 goto err_conf_name_free;
1336 }
1337
1338 talloc_free(confs);
1339 dbus_message_unref(rsp_msg);
1340 dbus_message_unref(req_msg);
1341
1342 *conf_name_out = conf_name;
1343 *base_path_out = base_path;
1344
1345 return NT_STATUS_OK;
1346
1347 err_conf_name_free:
1348 talloc_free(conf_name);
1349 err_array_free:
1350 talloc_free(confs);
1351 err_rsp_free:
1352 dbus_message_unref(rsp_msg);
1353 err_req_free:
1354 dbus_message_unref(req_msg);
1355 err_out:
1356 return status;
1357 }
1358
1359 /*
1360 * Check whether a path can be shadow copied. Return the base volume, allowing
1361 * the caller to determine if multiple paths lie on the same base volume.
1362 */
1363 static NTSTATUS snapper_snap_check_path(struct vfs_handle_struct *handle,
1364 TALLOC_CTX *mem_ctx,
1365 const char *service_path,
1366 char **base_volume)
1367 {
1368 NTSTATUS status;
1369 DBusConnection *dconn;
1370 char *conf_name;
1371 char *base_path;
1372
1373 dconn = snapper_dbus_conn_create();
1374 if (dconn == NULL) {
1375 return NT_STATUS_UNSUCCESSFUL;
1376 }
1377
1378 status = snapper_get_conf_call(mem_ctx, dconn, service_path,
1379 &conf_name, &base_path);
1380 if (!NT_STATUS_IS_OK(status)) {
1381 goto err_conn_close;
1382 }
1383
1384 talloc_free(conf_name);
1385 *base_volume = base_path;
1386 snapper_dbus_conn_destroy(dconn);
1387
1388 return NT_STATUS_OK;
1389
1390 err_conn_close:
1391 snapper_dbus_conn_destroy(dconn);
1392 return status;
1393 }
1394
1395 static NTSTATUS snapper_create_snap_call(TALLOC_CTX *mem_ctx,
1396 DBusConnection *dconn,
1397 const char *conf_name,
1398 const char *base_path,
1399 const char *snap_desc,
1400 uint32_t num_user_data,
1401 struct snapper_dict *user_data,
1402 char **snap_path_out)
1403 {
1404 NTSTATUS status;
1405 DBusMessage *req_msg;
1406 DBusMessage *rsp_msg;
1407 uint32_t snap_id;
1408 char *snap_path;
1409
1410 status = snapper_create_snap_pack(mem_ctx,
1411 conf_name,
1412 snap_desc,
1413 num_user_data,
1414 user_data,
1415 &req_msg);
1416 if (!NT_STATUS_IS_OK(status)) {
1417 goto err_out;
1418 }
1419
1420 status = snapper_dbus_msg_xchng(dconn, req_msg, &rsp_msg);
1421 if (!NT_STATUS_IS_OK(status)) {
1422 goto err_req_free;
1423 }
1424
1425 status = snapper_create_snap_unpack(dconn, rsp_msg, &snap_id);
1426 if (!NT_STATUS_IS_OK(status)) {
1427 goto err_rsp_free;
1428 }
1429
1430 status = snapper_snap_id_to_path(mem_ctx, base_path, snap_id,
1431 &snap_path);
1432 if (!NT_STATUS_IS_OK(status)) {
1433 goto err_rsp_free;
1434 }
1435
1436 dbus_message_unref(rsp_msg);
1437 dbus_message_unref(req_msg);
1438
1439 DEBUG(6, ("created new snapshot %u at %s\n", snap_id, snap_path));
1440 *snap_path_out = snap_path;
1441
1442 return NT_STATUS_OK;
1443
1444 err_rsp_free:
1445 dbus_message_unref(rsp_msg);
1446 err_req_free:
1447 dbus_message_unref(req_msg);
1448 err_out:
1449 return status;
1450 }
1451
1452 static NTSTATUS snapper_snap_create(struct vfs_handle_struct *handle,
1453 TALLOC_CTX *mem_ctx,
1454 const char *base_volume,
1455 time_t *tstamp,
1456 bool rw,
1457 char **_base_path,
1458 char **_snap_path)
1459 {
1460 DBusConnection *dconn;
1461 NTSTATUS status;
1462 char *conf_name;
1463 char *base_path;
1464 char *snap_path;
1465 TALLOC_CTX *tmp_ctx;
1466
1467 tmp_ctx = talloc_new(mem_ctx);
1468 if (tmp_ctx == NULL) {
1469 return NT_STATUS_NO_MEMORY;
1470 }
1471
1472 dconn = snapper_dbus_conn_create();
1473 if (dconn == NULL) {
1474 talloc_free(tmp_ctx);
1475 return NT_STATUS_UNSUCCESSFUL;
1476 }
1477
1478 status = snapper_get_conf_call(tmp_ctx, dconn, base_volume,
1479 &conf_name, &base_path);
1480 if (!NT_STATUS_IS_OK(status)) {
1481 snapper_dbus_conn_destroy(dconn);
1482 talloc_free(tmp_ctx);
1483 return status;
1484 }
1485
1486 status = snapper_create_snap_call(tmp_ctx, dconn,
1487 conf_name, base_path,
1488 "Snapshot created by Samba",
1489 0, NULL,
1490 &snap_path);
1491 if (!NT_STATUS_IS_OK(status)) {
1492 snapper_dbus_conn_destroy(dconn);
1493 talloc_free(tmp_ctx);
1494 return status;
1495 }
1496
1497 snapper_dbus_conn_destroy(dconn);
1498 *_base_path = talloc_steal(mem_ctx, base_path);
1499 *_snap_path = talloc_steal(mem_ctx, snap_path);
1500 talloc_free(tmp_ctx);
1501
1502 return NT_STATUS_OK;
1503 }
1504
1505 static NTSTATUS snapper_delete_snap_call(TALLOC_CTX *mem_ctx,
1506 DBusConnection *dconn,
1507 const char *conf_name,
1508 uint32_t snap_id)
1509 {
1510 NTSTATUS status;
1511 DBusMessage *req_msg;
1512 DBusMessage *rsp_msg;
1513
1514 status = snapper_del_snap_pack(mem_ctx, conf_name, snap_id, &req_msg);
1515 if (!NT_STATUS_IS_OK(status)) {
1516 goto err_out;
1517 }
1518
1519 status = snapper_dbus_msg_xchng(dconn, req_msg, &rsp_msg);
1520 if (!NT_STATUS_IS_OK(status)) {
1521 goto err_req_free;
1522 }
1523
1524 status = snapper_del_snap_unpack(dconn, rsp_msg);
1525 if (!NT_STATUS_IS_OK(status)) {
1526 goto err_rsp_free;
1527 }
1528
1529 dbus_message_unref(rsp_msg);
1530 dbus_message_unref(req_msg);
1531
1532 DEBUG(6, ("deleted snapshot %u\n", snap_id));
1533
1534 return NT_STATUS_OK;
1535
1536 err_rsp_free:
1537 dbus_message_unref(rsp_msg);
1538 err_req_free:
1539 dbus_message_unref(req_msg);
1540 err_out:
1541 return status;
1542 }
1543
1544 static NTSTATUS snapper_snap_delete(struct vfs_handle_struct *handle,
1545 TALLOC_CTX *mem_ctx,
1546 char *base_path,
1547 char *snap_path)
1548 {
1549 DBusConnection *dconn;
1550 NTSTATUS status;
1551 char *conf_name;
1552 char *snap_base_path;
1553 uint32_t snap_id;
1554 TALLOC_CTX *tmp_ctx;
1555
1556 tmp_ctx = talloc_new(mem_ctx);
1557 if (tmp_ctx == NULL) {
1558 return NT_STATUS_NO_MEMORY;
1559 }
1560
1561 dconn = snapper_dbus_conn_create();
1562 if (dconn == NULL) {
1563 talloc_free(tmp_ctx);
1564 return NT_STATUS_UNSUCCESSFUL;
1565 }
1566
1567 status = snapper_get_conf_call(tmp_ctx, dconn, base_path,
1568 &conf_name, &snap_base_path);
1569 if (!NT_STATUS_IS_OK(status)) {
1570 snapper_dbus_conn_destroy(dconn);
1571 talloc_free(tmp_ctx);
1572 return status;
1573 }
1574
1575 status = snapper_snap_path_to_id(tmp_ctx, snap_path, &snap_id);
1576 if (!NT_STATUS_IS_OK(status)) {
1577 snapper_dbus_conn_destroy(dconn);
1578 talloc_free(tmp_ctx);
1579 return status;
1580 }
1581
1582 status = snapper_delete_snap_call(tmp_ctx, dconn, conf_name, snap_id);
1583 if (!NT_STATUS_IS_OK(status)) {
1584 snapper_dbus_conn_destroy(dconn);
1585 talloc_free(tmp_ctx);
1586 return status;
1587 }
1588
1589 snapper_dbus_conn_destroy(dconn);
1590 talloc_free(tmp_ctx);
1591
1592 return NT_STATUS_OK;
1593 }
1594
1595 /* sc_data used as parent talloc context for all labels */
1596 static int snapper_get_shadow_copy_data(struct vfs_handle_struct *handle,
1597 struct files_struct *fsp,
1598 struct shadow_copy_data *sc_data,
1599 bool labels)
1600 {
1601 DBusConnection *dconn;
1602 TALLOC_CTX *tmp_ctx;
1603 NTSTATUS status;
1604 char *conf_name;
1605 char *base_path;
1606 DBusMessage *req_msg;
1607 DBusMessage *rsp_msg;
1608 uint32_t num_snaps;
1609 struct snapper_snap *snaps;
1610 uint32_t i;
1611 uint32_t lbl_off;
1612
1613 tmp_ctx = talloc_new(sc_data);
1614 if (tmp_ctx == NULL) {
1615 status = NT_STATUS_NO_MEMORY;
1616 goto err_out;
1617 }
1618
1619 dconn = snapper_dbus_conn_create();
1620 if (dconn == NULL) {
1621 status = NT_STATUS_UNSUCCESSFUL;
1622 goto err_mem_ctx_free;
1623 }
1624
1625 if (fsp->conn->connectpath == NULL) {
1626 status = NT_STATUS_INVALID_PARAMETER;
1627 goto err_conn_free;
1628 }
1629
1630 status = snapper_get_conf_call(tmp_ctx, dconn,
1631 fsp->conn->connectpath,
1632 &conf_name,
1633 &base_path);
1634 if (!NT_STATUS_IS_OK(status)) {
1635 goto err_conn_free;
1636 }
1637
1638 status = snapper_list_snaps_pack(tmp_ctx, conf_name, &req_msg);
1639 if (!NT_STATUS_IS_OK(status)) {
1640 goto err_conn_free;
1641 }
1642
1643 status = snapper_dbus_msg_xchng(dconn, req_msg, &rsp_msg);
1644 if (!NT_STATUS_IS_OK(status)) {
1645 goto err_req_free;
1646 }
1647
1648 status = snapper_list_snaps_unpack(tmp_ctx, rsp_msg,
1649 &num_snaps, &snaps);
1650 if (!NT_STATUS_IS_OK(status)) {
1651 goto err_rsp_free;
1652 }
1653 /* we should always get at least one snapshot (current) */
1654 if (num_snaps == 0) {
1655 DEBUG(1, ("zero snapshots in snap list response\n"));
1656 status = NT_STATUS_UNSUCCESSFUL;
1657 goto err_rsp_free;
1658 }
1659
1660 /* subtract 1, (current) snapshot is not returned */
1661 sc_data->num_volumes = num_snaps - 1;
1662 sc_data->labels = NULL;
1663
1664 if ((labels == false) || (sc_data->num_volumes == 0)) {
1665 /* tokens need not be added to the labels array */
1666 goto done;
1667 }
1668
1669 sc_data->labels = talloc_array(sc_data, SHADOW_COPY_LABEL,
1670 sc_data->num_volumes);
1671 if (sc_data->labels == NULL) {
1672 status = NT_STATUS_NO_MEMORY;
1673 goto err_rsp_free;
1674 }
1675
1676 /* start at end for decending order, do not include 0 (current) */
1677 lbl_off = 0;
1678 for (i = num_snaps - 1; i > 0; i--) {
1679 char *lbl = sc_data->labels[lbl_off++];
1680 struct tm gmt_snap_time;
1681 struct tm *tm_ret;
1682 size_t str_sz;
1683
1684 tm_ret = gmtime_r((time_t *)&snaps[i].time, &gmt_snap_time);
1685 if (tm_ret == NULL) {
1686 status = NT_STATUS_UNSUCCESSFUL;
1687 goto err_labels_free;
1688 }
1689 str_sz = strftime(lbl, sizeof(SHADOW_COPY_LABEL),
1690 "@GMT-%Y.%m.%d-%H.%M.%S", &gmt_snap_time);
1691 if (str_sz == 0) {
1692 status = NT_STATUS_UNSUCCESSFUL;
1693 goto err_labels_free;
1694 }
1695 }
1696
1697 done:
1698 talloc_free(tmp_ctx);
1699 dbus_message_unref(rsp_msg);
1700 dbus_message_unref(req_msg);
1701 snapper_dbus_conn_destroy(dconn);
1702
1703 return 0;
1704
1705 err_labels_free:
1706 TALLOC_FREE(sc_data->labels);
1707 err_rsp_free:
1708 dbus_message_unref(rsp_msg);
1709 err_req_free:
1710 dbus_message_unref(req_msg);
1711 err_conn_free:
1712 snapper_dbus_conn_destroy(dconn);
1713 err_mem_ctx_free:
1714 talloc_free(tmp_ctx);
1715 err_out:
1716 errno = map_errno_from_nt_status(status);
1717 return -1;
1718 }
1719
1720 static bool snapper_gmt_strip_snapshot(TALLOC_CTX *mem_ctx,
1721 struct vfs_handle_struct *handle,
1722 const char *name,
1723 time_t *ptimestamp,
1724 char **pstripped)
1725 {
1726 struct tm tm;
1727 time_t timestamp;
1728 const char *p;
1729 char *q;
1730 char *stripped;
1731 size_t rest_len, dst_len;
1732
1733 p = strstr_m(name, "@GMT-");
1734 if (p == NULL) {
1735 goto no_snapshot;
1736 }
1737 if ((p > name) && (p[-1] != '/')) {
1738 goto no_snapshot;
1739 }
1740 q = strptime(p, GMT_FORMAT, &tm);
1741 if (q == NULL) {
1742 goto no_snapshot;
1743 }
1744 tm.tm_isdst = -1;
1745 timestamp = timegm(&tm);
1746 if (timestamp == (time_t)-1) {
1747 goto no_snapshot;
1748 }
1749 if ((p == name) && (q[0] == '\0')) {
1750 if (pstripped != NULL) {
1751 stripped = talloc_strdup(mem_ctx, "");
1752 if (stripped == NULL) {
1753 return false;
1754 }
1755 *pstripped = stripped;
1756 }
1757 *ptimestamp = timestamp;
1758 return true;
1759 }
1760 if (q[0] != '/') {
1761 goto no_snapshot;
1762 }
1763 q += 1;
1764
1765 rest_len = strlen(q);
1766 dst_len = (p-name) + rest_len;
1767
1768 if (pstripped != NULL) {
1769 stripped = talloc_array(mem_ctx, char, dst_len+1);
1770 if (stripped == NULL) {
1771 errno = ENOMEM;
1772 return false;
1773 }
1774 if (p > name) {
1775 memcpy(stripped, name, p-name);
1776 }
1777 if (rest_len > 0) {
1778 memcpy(stripped + (p-name), q, rest_len);
1779 }
1780 stripped[dst_len] = '\0';
1781 *pstripped = stripped;
1782 }
1783 *ptimestamp = timestamp;
1784 return true;
1785 no_snapshot:
1786 *ptimestamp = 0;
1787 return true;
1788 }
1789
1790 static NTSTATUS snapper_get_snap_at_time_call(TALLOC_CTX *mem_ctx,
1791 DBusConnection *dconn,
1792 const char *conf_name,
1793 const char *base_path,
1794 time_t snaptime,
1795 char **snap_path_out)
1796 {
1797 NTSTATUS status;
1798 DBusMessage *req_msg;
1799 DBusMessage *rsp_msg;
1800 uint32_t num_snaps;
1801 struct snapper_snap *snaps;
1802 char *snap_path;
1803
1804 status = snapper_list_snaps_at_time_pack(mem_ctx,
1805 conf_name,
1806 snaptime,
1807 snaptime,
1808 &req_msg);
1809 if (!NT_STATUS_IS_OK(status)) {
1810 goto err_out;
1811 }
1812
1813 status = snapper_dbus_msg_xchng(dconn, req_msg, &rsp_msg);
1814 if (!NT_STATUS_IS_OK(status)) {
1815 goto err_req_free;
1816 }
1817
1818 status = snapper_list_snaps_unpack(mem_ctx, rsp_msg,
1819 &num_snaps, &snaps);
1820 if (!NT_STATUS_IS_OK(status)) {
1821 goto err_rsp_free;
1822 }
1823
1824 if (num_snaps == 0) {
1825 DEBUG(4, ("no snapshots found with time: %lu\n", snaptime));
1826 status = NT_STATUS_INVALID_PARAMETER;
1827 goto err_snap_array_free;
1828 } else if (num_snaps > 0) {
1829 DEBUG(4, ("got %u snapshots for single time %lu, using top\n",
1830 num_snaps, snaptime));
1831 }
1832
1833 status = snapper_snap_id_to_path(mem_ctx, base_path, snaps[0].id,
1834 &snap_path);
1835 if (!NT_STATUS_IS_OK(status)) {
1836 goto err_snap_array_free;
1837 }
1838
1839 *snap_path_out = snap_path;
1840 err_snap_array_free:
1841 talloc_free(snaps);
1842 err_rsp_free:
1843 dbus_message_unref(rsp_msg);
1844 err_req_free:
1845 dbus_message_unref(req_msg);
1846 err_out:
1847 return status;
1848 }
1849
1850 static NTSTATUS snapper_snap_path_expand(struct connection_struct *conn,
1851 TALLOC_CTX *mem_ctx,
1852 time_t snap_time,
1853 char **snap_dir_out)
1854 {
1855 DBusConnection *dconn;
1856 NTSTATUS status;
1857 char *conf_name;
1858 char *base_path;
1859 char *snap_path;
1860
1861 dconn = snapper_dbus_conn_create();
1862 if (dconn == NULL) {
1863 status = NT_STATUS_UNSUCCESSFUL;
1864 goto err_out;
1865 }
1866
1867 if (conn->connectpath == NULL) {
1868 status = NT_STATUS_INVALID_PARAMETER;
1869 goto err_conn_free;
1870 }
1871
1872 status = snapper_get_conf_call(mem_ctx, dconn,
1873 conn->connectpath,
1874 &conf_name,
1875 &base_path);
1876 if (!NT_STATUS_IS_OK(status)) {
1877 goto err_conn_free;
1878 }
1879
1880 status = snapper_get_snap_at_time_call(mem_ctx, dconn,
1881 conf_name, base_path, snap_time,
1882 &snap_path);
1883 if (!NT_STATUS_IS_OK(status)) {
1884 goto err_conf_name_free;
1885 }
1886
1887 /* confirm snapshot path is nested under base path */
1888 if (strncmp(snap_path, base_path, strlen(base_path)) != 0) {
1889 status = NT_STATUS_INVALID_PARAMETER;
1890 goto err_snap_path_free;
1891 }
1892
1893 talloc_free(conf_name);
1894 talloc_free(base_path);
1895 snapper_dbus_conn_destroy(dconn);
1896 *snap_dir_out = snap_path;
1897
1898 return NT_STATUS_OK;
1899
1900 err_snap_path_free:
1901 talloc_free(snap_path);
1902 err_conf_name_free:
1903 talloc_free(conf_name);
1904 talloc_free(base_path);
1905 err_conn_free:
1906 snapper_dbus_conn_destroy(dconn);
1907 err_out:
1908 return status;
1909 }
1910
1911 static char *snapper_gmt_convert(TALLOC_CTX *mem_ctx,
1912 struct vfs_handle_struct *handle,
1913 const char *name, time_t timestamp)
1914 {
1915 char *snap_path = NULL;
1916 char *path = NULL;
1917 NTSTATUS status;
1918 int saved_errno;
1919
1920 status = snapper_snap_path_expand(handle->conn, mem_ctx, timestamp,
1921 &snap_path);
1922 if (!NT_STATUS_IS_OK(status)) {
1923 errno = map_errno_from_nt_status(status);
1924 goto err_out;
1925 }
1926
1927 path = talloc_asprintf(mem_ctx, "%s/%s", snap_path, name);
1928 if (path == NULL) {
1929 errno = ENOMEM;
1930 goto err_snap_path_free;
1931 }
1932
1933 DEBUG(10, ("converted %s/%s @ time to %s\n",
1934 handle->conn->connectpath, name, path));
1935 return path;
1936
1937 err_snap_path_free:
1938 saved_errno = errno;
1939 talloc_free(snap_path);
1940 errno = saved_errno;
1941 err_out:
1942 return NULL;
1943 }
1944
1945 static DIR *snapper_gmt_opendir(vfs_handle_struct *handle,
1946 const char *fname,
1947 const char *mask,
1948 uint32_t attr)
1949 {
1950 time_t timestamp;
1951 char *stripped;
1952 DIR *ret;
1953 int saved_errno;
1954 char *conv;
1955
1956 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname,
1957 &timestamp, &stripped)) {
1958 return NULL;
1959 }
1960 if (timestamp == 0) {
1961 return SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
1962 }
1963 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
1964 TALLOC_FREE(stripped);
1965 if (conv == NULL) {
1966 return NULL;
1967 }
1968 ret = SMB_VFS_NEXT_OPENDIR(handle, conv, mask, attr);
1969 saved_errno = errno;
1970 TALLOC_FREE(conv);
1971 errno = saved_errno;
1972 return ret;
1973 }
1974
1975 static int snapper_gmt_rename(vfs_handle_struct *handle,
1976 const struct smb_filename *smb_fname_src,
1977 const struct smb_filename *smb_fname_dst)
1978 {
1979 time_t timestamp_src, timestamp_dst;
1980
1981 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
1982 smb_fname_src->base_name,
1983 &timestamp_src, NULL)) {
1984 return -1;
1985 }
1986 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
1987 smb_fname_dst->base_name,
1988 &timestamp_dst, NULL)) {
1989 return -1;
1990 }
1991 if (timestamp_src != 0) {
1992 errno = EXDEV;
1993 return -1;
1994 }
1995 if (timestamp_dst != 0) {
1996 errno = EROFS;
1997 return -1;
1998 }
1999 return SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
2000 }
2001
2002 static int snapper_gmt_symlink(vfs_handle_struct *handle,
2003 const char *oldname, const char *newname)
2004 {
2005 time_t timestamp_old, timestamp_new;
2006
2007 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, oldname,
2008 &timestamp_old, NULL)) {
2009 return -1;
2010 }
2011 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, newname,
2012 &timestamp_new, NULL)) {
2013 return -1;
2014 }
2015 if ((timestamp_old != 0) || (timestamp_new != 0)) {
2016 errno = EROFS;
2017 return -1;
2018 }
2019 return SMB_VFS_NEXT_SYMLINK(handle, oldname, newname);
2020 }
2021
2022 static int snapper_gmt_link(vfs_handle_struct *handle,
2023 const char *oldname, const char *newname)
2024 {
2025 time_t timestamp_old, timestamp_new;
2026
2027 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, oldname,
2028 &timestamp_old, NULL)) {
2029 return -1;
2030 }
2031 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, newname,
2032 &timestamp_new, NULL)) {
2033 return -1;
2034 }
2035 if ((timestamp_old != 0) || (timestamp_new != 0)) {
2036 errno = EROFS;
2037 return -1;
2038 }
2039 return SMB_VFS_NEXT_LINK(handle, oldname, newname);
2040 }
2041
2042 static int snapper_gmt_stat(vfs_handle_struct *handle,
2043 struct smb_filename *smb_fname)
2044 {
2045 time_t timestamp;
2046 char *stripped, *tmp;
2047 int ret, saved_errno;
2048
2049 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2050 smb_fname->base_name,
2051 &timestamp, &stripped)) {
2052 return -1;
2053 }
2054 if (timestamp == 0) {
2055 return SMB_VFS_NEXT_STAT(handle, smb_fname);
2056 }
2057
2058 tmp = smb_fname->base_name;
2059 smb_fname->base_name = snapper_gmt_convert(talloc_tos(), handle,
2060 stripped, timestamp);
2061 TALLOC_FREE(stripped);
2062
2063 if (smb_fname->base_name == NULL) {
2064 smb_fname->base_name = tmp;
2065 return -1;
2066 }
2067
2068 ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
2069 saved_errno = errno;
2070
2071 TALLOC_FREE(smb_fname->base_name);
2072 smb_fname->base_name = tmp;
2073
2074 errno = saved_errno;
2075 return ret;
2076 }
2077
2078 static int snapper_gmt_lstat(vfs_handle_struct *handle,
2079 struct smb_filename *smb_fname)
2080 {
2081 time_t timestamp;
2082 char *stripped, *tmp;
2083 int ret, saved_errno;
2084
2085 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2086 smb_fname->base_name,
2087 &timestamp, &stripped)) {
2088 return -1;
2089 }
2090 if (timestamp == 0) {
2091 return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
2092 }
2093
2094 tmp = smb_fname->base_name;
2095 smb_fname->base_name = snapper_gmt_convert(talloc_tos(), handle,
2096 stripped, timestamp);
2097 TALLOC_FREE(stripped);
2098
2099 if (smb_fname->base_name == NULL) {
2100 smb_fname->base_name = tmp;
2101 return -1;
2102 }
2103
2104 ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
2105 saved_errno = errno;
2106
2107 TALLOC_FREE(smb_fname->base_name);
2108 smb_fname->base_name = tmp;
2109
2110 errno = saved_errno;
2111 return ret;
2112 }
2113
2114 static int snapper_gmt_fstat(vfs_handle_struct *handle, files_struct *fsp,
2115 SMB_STRUCT_STAT *sbuf)
2116 {
2117 time_t timestamp;
2118 int ret;
2119
2120 ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
2121 if (ret == -1) {
2122 return ret;
2123 }
2124 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2125 fsp->fsp_name->base_name,
2126 &timestamp, NULL)) {
2127 return 0;
2128 }
2129 return 0;
2130 }
2131
2132 static int snapper_gmt_open(vfs_handle_struct *handle,
2133 struct smb_filename *smb_fname, files_struct *fsp,
2134 int flags, mode_t mode)
2135 {
2136 time_t timestamp;
2137 char *stripped, *tmp;
2138 int ret, saved_errno;
2139
2140 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2141 smb_fname->base_name,
2142 &timestamp, &stripped)) {
2143 return -1;
2144 }
2145 if (timestamp == 0) {
2146 return SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
2147 }
2148
2149 tmp = smb_fname->base_name;
2150 smb_fname->base_name = snapper_gmt_convert(talloc_tos(), handle,
2151 stripped, timestamp);
2152 TALLOC_FREE(stripped);
2153
2154 if (smb_fname->base_name == NULL) {
2155 smb_fname->base_name = tmp;
2156 return -1;
2157 }
2158
2159 ret = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
2160 saved_errno = errno;
2161
2162 TALLOC_FREE(smb_fname->base_name);
2163 smb_fname->base_name = tmp;
2164
2165 errno = saved_errno;
2166 return ret;
2167 }
2168
2169 static int snapper_gmt_unlink(vfs_handle_struct *handle,
2170 const struct smb_filename *smb_fname)
2171 {
2172 time_t timestamp;
2173 char *stripped;
2174 int ret, saved_errno;
2175 struct smb_filename *conv;
2176
2177 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2178 smb_fname->base_name,
2179 &timestamp, &stripped)) {
2180 return -1;
2181 }
2182 if (timestamp == 0) {
2183 return SMB_VFS_NEXT_UNLINK(handle, smb_fname);
2184 }
2185 conv = cp_smb_filename(talloc_tos(), smb_fname);
2186 if (conv == NULL) {
2187 errno = ENOMEM;
2188 return -1;
2189 }
2190 conv->base_name = snapper_gmt_convert(conv, handle,
2191 stripped, timestamp);
2192 TALLOC_FREE(stripped);
2193 if (conv->base_name == NULL) {
2194 return -1;
2195 }
2196 ret = SMB_VFS_NEXT_UNLINK(handle, conv);
2197 saved_errno = errno;
2198 TALLOC_FREE(conv);
2199 errno = saved_errno;
2200 return ret;
2201 }
2202
2203 static int snapper_gmt_chmod(vfs_handle_struct *handle, const char *fname,
2204 mode_t mode)
2205 {
2206 time_t timestamp;
2207 char *stripped;
2208 int ret, saved_errno;
2209 char *conv;
2210
2211 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname,
2212 &timestamp, &stripped)) {
2213 return -1;
2214 }
2215 if (timestamp == 0) {
2216 return SMB_VFS_NEXT_CHMOD(handle, fname, mode);
2217 }
2218 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2219 TALLOC_FREE(stripped);
2220 if (conv == NULL) {
2221 return -1;
2222 }
2223 ret = SMB_VFS_NEXT_CHMOD(handle, conv, mode);
2224 saved_errno = errno;
2225 TALLOC_FREE(conv);
2226 errno = saved_errno;
2227 return ret;
2228 }
2229
2230 static int snapper_gmt_chown(vfs_handle_struct *handle, const char *fname,
2231 uid_t uid, gid_t gid)
2232 {
2233 time_t timestamp;
2234 char *stripped;
2235 int ret, saved_errno;
2236 char *conv;
2237
2238 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname,
2239 &timestamp, &stripped)) {
2240 return -1;
2241 }
2242 if (timestamp == 0) {
2243 return SMB_VFS_NEXT_CHOWN(handle, fname, uid, gid);
2244 }
2245 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2246 TALLOC_FREE(stripped);
2247 if (conv == NULL) {
2248 return -1;
2249 }
2250 ret = SMB_VFS_NEXT_CHOWN(handle, conv, uid, gid);
2251 saved_errno = errno;
2252 TALLOC_FREE(conv);
2253 errno = saved_errno;
2254 return ret;
2255 }
2256
2257 static int snapper_gmt_chdir(vfs_handle_struct *handle,
2258 const char *fname)
2259 {
2260 time_t timestamp;
2261 char *stripped;
2262 int ret, saved_errno;
2263 char *conv;
2264
2265 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname,
2266 &timestamp, &stripped)) {
2267 return -1;
2268 }
2269 if (timestamp == 0) {
2270 return SMB_VFS_NEXT_CHDIR(handle, fname);
2271 }
2272 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2273 TALLOC_FREE(stripped);
2274 if (conv == NULL) {
2275 return -1;
2276 }
2277 ret = SMB_VFS_NEXT_CHDIR(handle, conv);
2278 saved_errno = errno;
2279 TALLOC_FREE(conv);
2280 errno = saved_errno;
2281 return ret;
2282 }
2283
2284 static int snapper_gmt_ntimes(vfs_handle_struct *handle,
2285 const struct smb_filename *smb_fname,
2286 struct smb_file_time *ft)
2287 {
2288 time_t timestamp;
2289 char *stripped;
2290 int ret, saved_errno;
2291 struct smb_filename *conv;
2292
2293 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2294 smb_fname->base_name,
2295 &timestamp, &stripped)) {
2296 return -1;
2297 }
2298 if (timestamp == 0) {
2299 return SMB_VFS_NEXT_NTIMES(handle, smb_fname, ft);
2300 }
2301 conv = cp_smb_filename(talloc_tos(), smb_fname);
2302 if (conv == NULL) {
2303 errno = ENOMEM;
2304 return -1;
2305 }
2306 conv->base_name = snapper_gmt_convert(conv, handle,
2307 stripped, timestamp);
2308 TALLOC_FREE(stripped);
2309 if (conv->base_name == NULL) {
2310 return -1;
2311 }
2312 ret = SMB_VFS_NEXT_NTIMES(handle, conv, ft);
2313 saved_errno = errno;
2314 TALLOC_FREE(conv);
2315 errno = saved_errno;
2316 return ret;
2317 }
2318
2319 static int snapper_gmt_readlink(vfs_handle_struct *handle,
2320 const char *fname, char *buf, size_t bufsiz)
2321 {
2322 time_t timestamp;
2323 char *stripped;
2324 int ret, saved_errno;
2325 char *conv;
2326
2327 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname,
2328 &timestamp, &stripped)) {
2329 return -1;
2330 }
2331 if (timestamp == 0) {
2332 return SMB_VFS_NEXT_READLINK(handle, fname, buf, bufsiz);
2333 }
2334 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2335 TALLOC_FREE(stripped);
2336 if (conv == NULL) {
2337 return -1;
2338 }
2339 ret = SMB_VFS_NEXT_READLINK(handle, conv, buf, bufsiz);
2340 saved_errno = errno;
2341 TALLOC_FREE(conv);
2342 errno = saved_errno;
2343 return ret;
2344 }
2345
2346 static int snapper_gmt_mknod(vfs_handle_struct *handle,
2347 const char *fname, mode_t mode, SMB_DEV_T dev)
2348 {
2349 time_t timestamp;
2350 char *stripped;
2351 int ret, saved_errno;
2352 char *conv;
2353
2354 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname,
2355 &timestamp, &stripped)) {
2356 return -1;
2357 }
2358 if (timestamp == 0) {
2359 return SMB_VFS_NEXT_MKNOD(handle, fname, mode, dev);
2360 }
2361 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2362 TALLOC_FREE(stripped);
2363 if (conv == NULL) {
2364 return -1;
2365 }
2366 ret = SMB_VFS_NEXT_MKNOD(handle, conv, mode, dev);
2367 saved_errno = errno;
2368 TALLOC_FREE(conv);
2369 errno = saved_errno;
2370 return ret;
2371 }
2372
2373 static char *snapper_gmt_realpath(vfs_handle_struct *handle,
2374 const char *fname)
2375 {
2376 time_t timestamp;
2377 char *stripped = NULL;
2378 char *tmp = NULL;
2379 char *result = NULL;
2380 int saved_errno;
2381
2382 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname,
2383 &timestamp, &stripped)) {
2384 goto done;
2385 }
2386 if (timestamp == 0) {
2387 return SMB_VFS_NEXT_REALPATH(handle, fname);
2388 }
2389
2390 tmp = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2391 if (tmp == NULL) {
2392 goto done;
2393 }
2394
2395 result = SMB_VFS_NEXT_REALPATH(handle, tmp);
2396 if (result == NULL) {
2397 goto done;
2398 }
2399
2400 done:
2401 saved_errno = errno;
2402 TALLOC_FREE(tmp);
2403 TALLOC_FREE(stripped);
2404 errno = saved_errno;
2405 return result;
2406 }
2407
2408 static NTSTATUS snapper_gmt_fget_nt_acl(vfs_handle_struct *handle,
2409 struct files_struct *fsp,
2410 uint32_t security_info,
2411 TALLOC_CTX *mem_ctx,
2412 struct security_descriptor **ppdesc)
2413 {
2414 time_t timestamp;
2415 char *stripped;
2416 NTSTATUS status;
2417 char *conv;
2418
2419 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2420 fsp->fsp_name->base_name,
2421 &timestamp, &stripped)) {
2422 return map_nt_error_from_unix(errno);
2423 }
2424 if (timestamp == 0) {
2425 return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp, security_info,
2426 mem_ctx,
2427 ppdesc);
2428 }
2429 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2430 TALLOC_FREE(stripped);
2431 if (conv == NULL) {
2432 return map_nt_error_from_unix(errno);
2433 }
2434 status = SMB_VFS_NEXT_GET_NT_ACL(handle, conv, security_info,
2435 mem_ctx, ppdesc);
2436 TALLOC_FREE(conv);
2437 return status;
2438 }
2439
2440 static NTSTATUS snapper_gmt_get_nt_acl(vfs_handle_struct *handle,
2441 const char *fname,
2442 uint32_t security_info,
2443 TALLOC_CTX *mem_ctx,
2444 struct security_descriptor **ppdesc)
2445 {
2446 time_t timestamp;
2447 char *stripped;
2448 NTSTATUS status;
2449 char *conv;
2450
2451 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname,
2452 &timestamp, &stripped)) {
2453 return map_nt_error_from_unix(errno);
2454 }
2455 if (timestamp == 0) {
2456 return SMB_VFS_NEXT_GET_NT_ACL(handle, fname, security_info,
2457 mem_ctx, ppdesc);
2458 }
2459 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2460 TALLOC_FREE(stripped);
2461 if (conv == NULL) {
2462 return map_nt_error_from_unix(errno);
2463 }
2464 status = SMB_VFS_NEXT_GET_NT_ACL(handle, conv, security_info,
2465 mem_ctx, ppdesc);
2466 TALLOC_FREE(conv);
2467 return status;
2468 }
2469
2470 static int snapper_gmt_mkdir(vfs_handle_struct *handle,
2471 const char *fname, mode_t mode)
2472 {
2473 time_t timestamp;
2474 char *stripped;
2475 int ret, saved_errno;
2476 char *conv;
2477
2478 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname,
2479 &timestamp, &stripped)) {
2480 return -1;
2481 }
2482 if (timestamp == 0) {
2483 return SMB_VFS_NEXT_MKDIR(handle, fname, mode);
2484 }
2485 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2486 TALLOC_FREE(stripped);
2487 if (conv == NULL) {
2488 return -1;
2489 }
2490 ret = SMB_VFS_NEXT_MKDIR(handle, conv, mode);
2491 saved_errno = errno;
2492 TALLOC_FREE(conv);
2493 errno = saved_errno;
2494 return ret;
2495 }
2496
2497 static int snapper_gmt_rmdir(vfs_handle_struct *handle, const char *fname)
2498 {
2499 time_t timestamp;
2500 char *stripped;
2501 int ret, saved_errno;
2502 char *conv;
2503
2504 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname,
2505 &timestamp, &stripped)) {
2506 return -1;
2507 }
2508 if (timestamp == 0) {
2509 return SMB_VFS_NEXT_RMDIR(handle, fname);
2510 }
2511 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2512 TALLOC_FREE(stripped);
2513 if (conv == NULL) {
2514 return -1;
2515 }
2516 ret = SMB_VFS_NEXT_RMDIR(handle, conv);
2517 saved_errno = errno;
2518 TALLOC_FREE(conv);
2519 errno = saved_errno;
2520 return ret;
2521 }
2522
2523 static int snapper_gmt_chflags(vfs_handle_struct *handle, const char *fname,
2524 unsigned int flags)
2525 {
2526 time_t timestamp;
2527 char *stripped;
2528 int ret, saved_errno;
2529 char *conv;
2530
2531 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname,
2532 &timestamp, &stripped)) {
2533 return -1;
2534 }
2535 if (timestamp == 0) {
2536 return SMB_VFS_NEXT_CHFLAGS(handle, fname, flags);
2537 }
2538 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2539 TALLOC_FREE(stripped);
2540 if (conv == NULL) {
2541 return -1;
2542 }
2543 ret = SMB_VFS_NEXT_CHFLAGS(handle, conv, flags);
2544 saved_errno = errno;
2545 TALLOC_FREE(conv);
2546 errno = saved_errno;
2547 return ret;
2548 }
2549
2550 static ssize_t snapper_gmt_getxattr(vfs_handle_struct *handle,
2551 const char *fname, const char *aname,
2552 void *value, size_t size)
2553 {
2554 time_t timestamp;
2555 char *stripped;
2556 ssize_t ret;
2557 int saved_errno;
2558 char *conv;
2559
2560 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname,
2561 &timestamp, &stripped)) {
2562 return -1;
2563 }
2564 if (timestamp == 0) {
2565 return SMB_VFS_NEXT_GETXATTR(handle, fname, aname, value,
2566 size);
2567 }
2568 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2569 TALLOC_FREE(stripped);
2570 if (conv == NULL) {
2571 return -1;
2572 }
2573 ret = SMB_VFS_NEXT_GETXATTR(handle, conv, aname, value, size);
2574 saved_errno = errno;
2575 TALLOC_FREE(conv);
2576 errno = saved_errno;
2577 return ret;
2578 }
2579
2580 static ssize_t snapper_gmt_listxattr(struct vfs_handle_struct *handle,
2581 const char *fname,
2582 char *list, size_t size)
2583 {
2584 time_t timestamp;
2585 char *stripped;
2586 ssize_t ret;
2587 int saved_errno;
2588 char *conv;
2589
2590 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname,
2591 &timestamp, &stripped)) {
2592 return -1;
2593 }
2594 if (timestamp == 0) {
2595 return SMB_VFS_NEXT_LISTXATTR(handle, fname, list, size);
2596 }
2597 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2598 TALLOC_FREE(stripped);
2599 if (conv == NULL) {
2600 return -1;
2601 }
2602 ret = SMB_VFS_NEXT_LISTXATTR(handle, conv, list, size);
2603 saved_errno = errno;
2604 TALLOC_FREE(conv);
2605 errno = saved_errno;
2606 return ret;
2607 }
2608
2609 static int snapper_gmt_removexattr(vfs_handle_struct *handle,
2610 const char *fname, const char *aname)
2611 {
2612 time_t timestamp;
2613 char *stripped;
2614 int ret, saved_errno;
2615 char *conv;
2616
2617 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname,
2618 &timestamp, &stripped)) {
2619 return -1;
2620 }
2621 if (timestamp == 0) {
2622 return SMB_VFS_NEXT_REMOVEXATTR(handle, fname, aname);
2623 }
2624 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2625 TALLOC_FREE(stripped);
2626 if (conv == NULL) {
2627 return -1;
2628 }
2629 ret = SMB_VFS_NEXT_REMOVEXATTR(handle, conv, aname);
2630 saved_errno = errno;
2631 TALLOC_FREE(conv);
2632 errno = saved_errno;
2633 return ret;
2634 }
2635
2636 static int snapper_gmt_setxattr(struct vfs_handle_struct *handle,
2637 const char *fname,
2638 const char *aname, const void *value,
2639 size_t size, int flags)
2640 {
2641 time_t timestamp;
2642 char *stripped;
2643 ssize_t ret;
2644 int saved_errno;
2645 char *conv;
2646
2647 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname,
2648 &timestamp, &stripped)) {
2649 return -1;
2650 }
2651 if (timestamp == 0) {
2652 return SMB_VFS_NEXT_SETXATTR(handle, fname, aname, value, size,
2653 flags);
2654 }
2655 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2656 TALLOC_FREE(stripped);
2657 if (conv == NULL) {
2658 return -1;
2659 }
2660 ret = SMB_VFS_NEXT_SETXATTR(handle, conv, aname, value, size, flags);
2661 saved_errno = errno;
2662 TALLOC_FREE(conv);
2663 errno = saved_errno;
2664 return ret;
2665 }
2666
2667 static int snapper_gmt_chmod_acl(vfs_handle_struct *handle,
2668 const char *fname, mode_t mode)
2669 {
2670 time_t timestamp;
2671 char *stripped;
2672 ssize_t ret;
2673 int saved_errno;
2674 char *conv;
2675
2676 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname,
2677 &timestamp, &stripped)) {
2678 return -1;
2679 }
2680 if (timestamp == 0) {
2681 return SMB_VFS_NEXT_CHMOD_ACL(handle, fname, mode);
2682 }
2683 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2684 TALLOC_FREE(stripped);
2685 if (conv == NULL) {
2686 return -1;
2687 }
2688 ret = SMB_VFS_NEXT_CHMOD_ACL(handle, conv, mode);
2689 saved_errno = errno;
2690 TALLOC_FREE(conv);
2691 errno = saved_errno;
2692 return ret;
2693 }
2694
2695 static int snapper_gmt_get_real_filename(struct vfs_handle_struct *handle,
2696 const char *path,
2697 const char *name,
2698 TALLOC_CTX *mem_ctx,
2699 char **found_name)
2700 {
2701 time_t timestamp;
2702 char *stripped;
2703 ssize_t ret;
2704 int saved_errno;
2705 char *conv;
2706
2707 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, path,
2708 &timestamp, &stripped)) {
2709 return -1;
2710 }
2711 if (timestamp == 0) {
2712 return SMB_VFS_NEXT_GET_REAL_FILENAME(handle, path, name,
2713 mem_ctx, found_name);
2714 }
2715 if (stripped[0] == '\0') {
2716 *found_name = talloc_strdup(mem_ctx, name);
2717 if (*found_name == NULL) {
2718 errno = ENOMEM;
2719 return -1;
2720 }
2721 return 0;
2722 }
2723 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2724 TALLOC_FREE(stripped);
2725 if (conv == NULL) {
2726 return -1;
2727 }
2728 ret = SMB_VFS_NEXT_GET_REAL_FILENAME(handle, conv, name,
2729 mem_ctx, found_name);
2730 saved_errno = errno;
2731 TALLOC_FREE(conv);
2732 errno = saved_errno;
2733 return ret;
2734 }
2735
2736 static uint64_t snapper_gmt_disk_free(vfs_handle_struct *handle,
2737 const char *path, uint64_t *bsize,
2738 uint64_t *dfree, uint64_t *dsize)
2739 {
2740 time_t timestamp;
2741 char *stripped;
2742 ssize_t ret;
2743 int saved_errno;
2744 char *conv;
2745
2746 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, path,
2747 &timestamp, &stripped)) {
2748 return -1;
2749 }
2750 if (timestamp == 0) {
2751 return SMB_VFS_NEXT_DISK_FREE(handle, path,
2752 bsize, dfree, dsize);
2753 }
2754
2755 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2756 TALLOC_FREE(stripped);
2757 if (conv == NULL) {
2758 return -1;
2759 }
2760
2761 ret = SMB_VFS_NEXT_DISK_FREE(handle, conv, bsize, dfree, dsize);
2762
2763 saved_errno = errno;
2764 TALLOC_FREE(conv);
2765 errno = saved_errno;
2766
2767 return ret;
2768 }
2769
2770
2771 static struct vfs_fn_pointers snapper_fns = {
2772 .snap_check_path_fn = snapper_snap_check_path,
2773 .snap_create_fn = snapper_snap_create,
2774 .snap_delete_fn = snapper_snap_delete,
2775 .get_shadow_copy_data_fn = snapper_get_shadow_copy_data,
2776 .opendir_fn = snapper_gmt_opendir,
2777 .disk_free_fn = snapper_gmt_disk_free,
2778 .rename_fn = snapper_gmt_rename,
2779 .link_fn = snapper_gmt_link,
2780 .symlink_fn = snapper_gmt_symlink,
2781 .stat_fn = snapper_gmt_stat,
2782 .lstat_fn = snapper_gmt_lstat,
2783 .fstat_fn = snapper_gmt_fstat,
2784 .open_fn = snapper_gmt_open,
2785 .unlink_fn = snapper_gmt_unlink,
2786 .chmod_fn = snapper_gmt_chmod,
2787 .chown_fn = snapper_gmt_chown,
2788 .chdir_fn = snapper_gmt_chdir,
2789 .ntimes_fn = snapper_gmt_ntimes,
2790 .readlink_fn = snapper_gmt_readlink,
2791 .mknod_fn = snapper_gmt_mknod,
2792 .realpath_fn = snapper_gmt_realpath,
2793 .get_nt_acl_fn = snapper_gmt_get_nt_acl,
2794 .fget_nt_acl_fn = snapper_gmt_fget_nt_acl,
2795 .mkdir_fn = snapper_gmt_mkdir,
2796 .rmdir_fn = snapper_gmt_rmdir,
2797 .getxattr_fn = snapper_gmt_getxattr,
2798 .listxattr_fn = snapper_gmt_listxattr,
2799 .removexattr_fn = snapper_gmt_removexattr,
2800 .setxattr_fn = snapper_gmt_setxattr,
2801 .chmod_acl_fn = snapper_gmt_chmod_acl,
2802 .chflags_fn = snapper_gmt_chflags,
2803 .get_real_filename_fn = snapper_gmt_get_real_filename,
2804 };
2805
2806 NTSTATUS vfs_snapper_init(void);
2807 NTSTATUS vfs_snapper_init(void)
2808 {
2809 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
2810 "snapper", &snapper_fns);
2811 }
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