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s3: VFS: Change SMB_VFS_GETXATTR to use const struct smb_filename * instead of const...
[Samba.git] / source3 / modules / vfs_snapper.c
blob2274a56a61ad3474758f1a51986376bdff65350b
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 = 0;
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 = NULL;
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 = NULL;
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 = NULL;
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 ptrdiff_t len_before_gmt;
1733
1734 p = strstr_m(name, "@GMT-");
1735 if (p == NULL) {
1736 goto no_snapshot;
1737 }
1738 if ((p > name) && (p[-1] != '/')) {
1739 goto no_snapshot;
1740 }
1741 len_before_gmt = p - name;
1742 q = strptime(p, GMT_FORMAT, &tm);
1743 if (q == NULL) {
1744 goto no_snapshot;
1745 }
1746 tm.tm_isdst = -1;
1747 timestamp = timegm(&tm);
1748 if (timestamp == (time_t)-1) {
1749 goto no_snapshot;
1750 }
1751 if (q[0] == '\0') {
1752 /*
1753 * The name consists of only the GMT token or the GMT
1754 * token is at the end of the path. XP seems to send
1755 * @GMT- at the end under certain circumstances even
1756 * with a path prefix.
1757 */
1758 if (pstripped != NULL) {
1759 if (len_before_gmt > 0) {
1760 /*
1761 * There is a slash before
1762 * the @GMT-. Remove it.
1763 */
1764 len_before_gmt -= 1;
1765 }
1766 stripped = talloc_strndup(mem_ctx, name,
1767 len_before_gmt);
1768 if (stripped == NULL) {
1769 return false;
1770 }
1771 *pstripped = stripped;
1772 }
1773 *ptimestamp = timestamp;
1774 return true;
1775 }
1776 if (q[0] != '/') {
1777 /*
1778 * It is not a complete path component, i.e. the path
1779 * component continues after the gmt-token.
1780 */
1781 goto no_snapshot;
1782 }
1783 q += 1;
1784
1785 rest_len = strlen(q);
1786 dst_len = len_before_gmt + rest_len;
1787
1788 if (pstripped != NULL) {
1789 stripped = talloc_array(mem_ctx, char, dst_len+1);
1790 if (stripped == NULL) {
1791 errno = ENOMEM;
1792 return false;
1793 }
1794 if (p > name) {
1795 memcpy(stripped, name, len_before_gmt);
1796 }
1797 if (rest_len > 0) {
1798 memcpy(stripped + len_before_gmt, q, rest_len);
1799 }
1800 stripped[dst_len] = '\0';
1801 *pstripped = stripped;
1802 }
1803 *ptimestamp = timestamp;
1804 return true;
1805 no_snapshot:
1806 *ptimestamp = 0;
1807 return true;
1808 }
1809
1810 static NTSTATUS snapper_get_snap_at_time_call(TALLOC_CTX *mem_ctx,
1811 DBusConnection *dconn,
1812 const char *conf_name,
1813 const char *base_path,
1814 time_t snaptime,
1815 char **snap_path_out)
1816 {
1817 NTSTATUS status;
1818 DBusMessage *req_msg = NULL;
1819 DBusMessage *rsp_msg;
1820 uint32_t num_snaps;
1821 struct snapper_snap *snaps;
1822 char *snap_path;
1823
1824 status = snapper_list_snaps_at_time_pack(mem_ctx,
1825 conf_name,
1826 snaptime,
1827 snaptime,
1828 &req_msg);
1829 if (!NT_STATUS_IS_OK(status)) {
1830 goto err_out;
1831 }
1832
1833 status = snapper_dbus_msg_xchng(dconn, req_msg, &rsp_msg);
1834 if (!NT_STATUS_IS_OK(status)) {
1835 goto err_req_free;
1836 }
1837
1838 status = snapper_list_snaps_unpack(mem_ctx, rsp_msg,
1839 &num_snaps, &snaps);
1840 if (!NT_STATUS_IS_OK(status)) {
1841 goto err_rsp_free;
1842 }
1843
1844 if (num_snaps == 0) {
1845 DEBUG(4, ("no snapshots found with time: %lu\n",
1846 (unsigned long)snaptime));
1847 status = NT_STATUS_INVALID_PARAMETER;
1848 goto err_snap_array_free;
1849 } else if (num_snaps > 0) {
1850 DEBUG(4, ("got %u snapshots for single time %lu, using top\n",
1851 num_snaps, (unsigned long)snaptime));
1852 }
1853
1854 status = snapper_snap_id_to_path(mem_ctx, base_path, snaps[0].id,
1855 &snap_path);
1856 if (!NT_STATUS_IS_OK(status)) {
1857 goto err_snap_array_free;
1858 }
1859
1860 *snap_path_out = snap_path;
1861 err_snap_array_free:
1862 talloc_free(snaps);
1863 err_rsp_free:
1864 dbus_message_unref(rsp_msg);
1865 err_req_free:
1866 dbus_message_unref(req_msg);
1867 err_out:
1868 return status;
1869 }
1870
1871 static NTSTATUS snapper_snap_path_expand(struct connection_struct *conn,
1872 TALLOC_CTX *mem_ctx,
1873 time_t snap_time,
1874 char **snap_dir_out)
1875 {
1876 DBusConnection *dconn;
1877 NTSTATUS status;
1878 char *conf_name;
1879 char *base_path;
1880 char *snap_path = NULL;
1881
1882 dconn = snapper_dbus_conn_create();
1883 if (dconn == NULL) {
1884 status = NT_STATUS_UNSUCCESSFUL;
1885 goto err_out;
1886 }
1887
1888 if (conn->connectpath == NULL) {
1889 status = NT_STATUS_INVALID_PARAMETER;
1890 goto err_conn_free;
1891 }
1892
1893 status = snapper_get_conf_call(mem_ctx, dconn,
1894 conn->connectpath,
1895 &conf_name,
1896 &base_path);
1897 if (!NT_STATUS_IS_OK(status)) {
1898 goto err_conn_free;
1899 }
1900
1901 status = snapper_get_snap_at_time_call(mem_ctx, dconn,
1902 conf_name, base_path, snap_time,
1903 &snap_path);
1904 if (!NT_STATUS_IS_OK(status)) {
1905 goto err_conf_name_free;
1906 }
1907
1908 /* confirm snapshot path is nested under base path */
1909 if (strncmp(snap_path, base_path, strlen(base_path)) != 0) {
1910 status = NT_STATUS_INVALID_PARAMETER;
1911 goto err_snap_path_free;
1912 }
1913
1914 talloc_free(conf_name);
1915 talloc_free(base_path);
1916 snapper_dbus_conn_destroy(dconn);
1917 *snap_dir_out = snap_path;
1918
1919 return NT_STATUS_OK;
1920
1921 err_snap_path_free:
1922 talloc_free(snap_path);
1923 err_conf_name_free:
1924 talloc_free(conf_name);
1925 talloc_free(base_path);
1926 err_conn_free:
1927 snapper_dbus_conn_destroy(dconn);
1928 err_out:
1929 return status;
1930 }
1931
1932 static char *snapper_gmt_convert(TALLOC_CTX *mem_ctx,
1933 struct vfs_handle_struct *handle,
1934 const char *name, time_t timestamp)
1935 {
1936 char *snap_path = NULL;
1937 char *path = NULL;
1938 NTSTATUS status;
1939 int saved_errno;
1940
1941 status = snapper_snap_path_expand(handle->conn, mem_ctx, timestamp,
1942 &snap_path);
1943 if (!NT_STATUS_IS_OK(status)) {
1944 errno = map_errno_from_nt_status(status);
1945 goto err_out;
1946 }
1947
1948 path = talloc_asprintf(mem_ctx, "%s/%s", snap_path, name);
1949 if (path == NULL) {
1950 errno = ENOMEM;
1951 goto err_snap_path_free;
1952 }
1953
1954 DEBUG(10, ("converted %s/%s @ time to %s\n",
1955 handle->conn->connectpath, name, path));
1956 return path;
1957
1958 err_snap_path_free:
1959 saved_errno = errno;
1960 talloc_free(snap_path);
1961 errno = saved_errno;
1962 err_out:
1963 return NULL;
1964 }
1965
1966 static DIR *snapper_gmt_opendir(vfs_handle_struct *handle,
1967 const struct smb_filename *smb_fname,
1968 const char *mask,
1969 uint32_t attr)
1970 {
1971 time_t timestamp;
1972 char *stripped;
1973 DIR *ret;
1974 int saved_errno;
1975 char *conv;
1976 struct smb_filename *conv_smb_fname = NULL;
1977
1978 if (!snapper_gmt_strip_snapshot(talloc_tos(),
1979 handle,
1980 smb_fname->base_name,
1981 &timestamp,
1982 &stripped)) {
1983 return NULL;
1984 }
1985 if (timestamp == 0) {
1986 return SMB_VFS_NEXT_OPENDIR(handle, smb_fname, mask, attr);
1987 }
1988 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
1989 TALLOC_FREE(stripped);
1990 if (conv == NULL) {
1991 return NULL;
1992 }
1993 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
1994 conv,
1995 NULL,
1996 NULL,
1997 smb_fname->flags);
1998 if (conv_smb_fname == NULL) {
1999 TALLOC_FREE(conv);
2000 errno = ENOMEM;
2001 return NULL;
2002 }
2003
2004 ret = SMB_VFS_NEXT_OPENDIR(handle, conv_smb_fname, mask, attr);
2005 saved_errno = errno;
2006 TALLOC_FREE(conv);
2007 TALLOC_FREE(conv_smb_fname);
2008 errno = saved_errno;
2009 return ret;
2010 }
2011
2012 static int snapper_gmt_rename(vfs_handle_struct *handle,
2013 const struct smb_filename *smb_fname_src,
2014 const struct smb_filename *smb_fname_dst)
2015 {
2016 time_t timestamp_src, timestamp_dst;
2017
2018 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2019 smb_fname_src->base_name,
2020 &timestamp_src, NULL)) {
2021 return -1;
2022 }
2023 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2024 smb_fname_dst->base_name,
2025 &timestamp_dst, NULL)) {
2026 return -1;
2027 }
2028 if (timestamp_src != 0) {
2029 errno = EXDEV;
2030 return -1;
2031 }
2032 if (timestamp_dst != 0) {
2033 errno = EROFS;
2034 return -1;
2035 }
2036 return SMB_VFS_NEXT_RENAME(handle, smb_fname_src, smb_fname_dst);
2037 }
2038
2039 static int snapper_gmt_symlink(vfs_handle_struct *handle,
2040 const char *oldname, const char *newname)
2041 {
2042 time_t timestamp_old, timestamp_new;
2043
2044 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, oldname,
2045 &timestamp_old, NULL)) {
2046 return -1;
2047 }
2048 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, newname,
2049 &timestamp_new, NULL)) {
2050 return -1;
2051 }
2052 if ((timestamp_old != 0) || (timestamp_new != 0)) {
2053 errno = EROFS;
2054 return -1;
2055 }
2056 return SMB_VFS_NEXT_SYMLINK(handle, oldname, newname);
2057 }
2058
2059 static int snapper_gmt_link(vfs_handle_struct *handle,
2060 const char *oldname, const char *newname)
2061 {
2062 time_t timestamp_old, timestamp_new;
2063
2064 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, oldname,
2065 &timestamp_old, NULL)) {
2066 return -1;
2067 }
2068 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, newname,
2069 &timestamp_new, NULL)) {
2070 return -1;
2071 }
2072 if ((timestamp_old != 0) || (timestamp_new != 0)) {
2073 errno = EROFS;
2074 return -1;
2075 }
2076 return SMB_VFS_NEXT_LINK(handle, oldname, newname);
2077 }
2078
2079 static int snapper_gmt_stat(vfs_handle_struct *handle,
2080 struct smb_filename *smb_fname)
2081 {
2082 time_t timestamp;
2083 char *stripped, *tmp;
2084 int ret, saved_errno;
2085
2086 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2087 smb_fname->base_name,
2088 &timestamp, &stripped)) {
2089 return -1;
2090 }
2091 if (timestamp == 0) {
2092 return SMB_VFS_NEXT_STAT(handle, smb_fname);
2093 }
2094
2095 tmp = smb_fname->base_name;
2096 smb_fname->base_name = snapper_gmt_convert(talloc_tos(), handle,
2097 stripped, timestamp);
2098 TALLOC_FREE(stripped);
2099
2100 if (smb_fname->base_name == NULL) {
2101 smb_fname->base_name = tmp;
2102 return -1;
2103 }
2104
2105 ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
2106 saved_errno = errno;
2107
2108 TALLOC_FREE(smb_fname->base_name);
2109 smb_fname->base_name = tmp;
2110
2111 errno = saved_errno;
2112 return ret;
2113 }
2114
2115 static int snapper_gmt_lstat(vfs_handle_struct *handle,
2116 struct smb_filename *smb_fname)
2117 {
2118 time_t timestamp;
2119 char *stripped, *tmp;
2120 int ret, saved_errno;
2121
2122 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2123 smb_fname->base_name,
2124 &timestamp, &stripped)) {
2125 return -1;
2126 }
2127 if (timestamp == 0) {
2128 return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
2129 }
2130
2131 tmp = smb_fname->base_name;
2132 smb_fname->base_name = snapper_gmt_convert(talloc_tos(), handle,
2133 stripped, timestamp);
2134 TALLOC_FREE(stripped);
2135
2136 if (smb_fname->base_name == NULL) {
2137 smb_fname->base_name = tmp;
2138 return -1;
2139 }
2140
2141 ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
2142 saved_errno = errno;
2143
2144 TALLOC_FREE(smb_fname->base_name);
2145 smb_fname->base_name = tmp;
2146
2147 errno = saved_errno;
2148 return ret;
2149 }
2150
2151 static int snapper_gmt_fstat(vfs_handle_struct *handle, files_struct *fsp,
2152 SMB_STRUCT_STAT *sbuf)
2153 {
2154 time_t timestamp;
2155 int ret;
2156
2157 ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
2158 if (ret == -1) {
2159 return ret;
2160 }
2161 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2162 fsp->fsp_name->base_name,
2163 &timestamp, NULL)) {
2164 return 0;
2165 }
2166 return 0;
2167 }
2168
2169 static int snapper_gmt_open(vfs_handle_struct *handle,
2170 struct smb_filename *smb_fname, files_struct *fsp,
2171 int flags, mode_t mode)
2172 {
2173 time_t timestamp;
2174 char *stripped, *tmp;
2175 int ret, saved_errno;
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_OPEN(handle, smb_fname, fsp, flags, mode);
2184 }
2185
2186 tmp = smb_fname->base_name;
2187 smb_fname->base_name = snapper_gmt_convert(talloc_tos(), handle,
2188 stripped, timestamp);
2189 TALLOC_FREE(stripped);
2190
2191 if (smb_fname->base_name == NULL) {
2192 smb_fname->base_name = tmp;
2193 return -1;
2194 }
2195
2196 ret = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
2197 saved_errno = errno;
2198
2199 TALLOC_FREE(smb_fname->base_name);
2200 smb_fname->base_name = tmp;
2201
2202 errno = saved_errno;
2203 return ret;
2204 }
2205
2206 static int snapper_gmt_unlink(vfs_handle_struct *handle,
2207 const struct smb_filename *smb_fname)
2208 {
2209 time_t timestamp;
2210 char *stripped;
2211 int ret, saved_errno;
2212 struct smb_filename *conv;
2213
2214 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2215 smb_fname->base_name,
2216 &timestamp, &stripped)) {
2217 return -1;
2218 }
2219 if (timestamp == 0) {
2220 return SMB_VFS_NEXT_UNLINK(handle, smb_fname);
2221 }
2222 conv = cp_smb_filename(talloc_tos(), smb_fname);
2223 if (conv == NULL) {
2224 errno = ENOMEM;
2225 return -1;
2226 }
2227 conv->base_name = snapper_gmt_convert(conv, handle,
2228 stripped, timestamp);
2229 TALLOC_FREE(stripped);
2230 if (conv->base_name == NULL) {
2231 return -1;
2232 }
2233 ret = SMB_VFS_NEXT_UNLINK(handle, conv);
2234 saved_errno = errno;
2235 TALLOC_FREE(conv);
2236 errno = saved_errno;
2237 return ret;
2238 }
2239
2240 static int snapper_gmt_chmod(vfs_handle_struct *handle,
2241 const struct smb_filename *smb_fname,
2242 mode_t mode)
2243 {
2244 time_t timestamp;
2245 char *stripped = NULL;
2246 int ret, saved_errno;
2247 char *conv = NULL;
2248 struct smb_filename *conv_smb_fname = NULL;
2249
2250 if (!snapper_gmt_strip_snapshot(talloc_tos(),
2251 handle,
2252 smb_fname->base_name,
2253 &timestamp,
2254 &stripped)) {
2255 return -1;
2256 }
2257 if (timestamp == 0) {
2258 TALLOC_FREE(stripped);
2259 return SMB_VFS_NEXT_CHMOD(handle, smb_fname, mode);
2260 }
2261 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2262 TALLOC_FREE(stripped);
2263 if (conv == NULL) {
2264 return -1;
2265 }
2266 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2267 conv,
2268 NULL,
2269 NULL,
2270 smb_fname->flags);
2271 if (conv_smb_fname == NULL) {
2272 TALLOC_FREE(conv);
2273 errno = ENOMEM;
2274 return -1;
2275 }
2276
2277 ret = SMB_VFS_NEXT_CHMOD(handle, conv_smb_fname, mode);
2278 saved_errno = errno;
2279 TALLOC_FREE(conv);
2280 TALLOC_FREE(conv_smb_fname);
2281 errno = saved_errno;
2282 return ret;
2283 }
2284
2285 static int snapper_gmt_chown(vfs_handle_struct *handle,
2286 const struct smb_filename *smb_fname,
2287 uid_t uid,
2288 gid_t gid)
2289 {
2290 time_t timestamp;
2291 char *stripped = NULL;
2292 int ret, saved_errno;
2293 char *conv = NULL;
2294 struct smb_filename *conv_smb_fname = NULL;
2295
2296 if (!snapper_gmt_strip_snapshot(talloc_tos(),
2297 handle,
2298 smb_fname->base_name,
2299 &timestamp,
2300 &stripped)) {
2301 return -1;
2302 }
2303 if (timestamp == 0) {
2304 TALLOC_FREE(stripped);
2305 return SMB_VFS_NEXT_CHOWN(handle, smb_fname, uid, gid);
2306 }
2307 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2308 TALLOC_FREE(stripped);
2309 if (conv == NULL) {
2310 return -1;
2311 }
2312 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2313 conv,
2314 NULL,
2315 NULL,
2316 smb_fname->flags);
2317 if (conv_smb_fname == NULL) {
2318 TALLOC_FREE(conv);
2319 errno = ENOMEM;
2320 return -1;
2321 }
2322 ret = SMB_VFS_NEXT_CHOWN(handle, conv_smb_fname, uid, gid);
2323 saved_errno = errno;
2324 TALLOC_FREE(conv);
2325 TALLOC_FREE(conv_smb_fname);
2326 errno = saved_errno;
2327 return ret;
2328 }
2329
2330 static int snapper_gmt_chdir(vfs_handle_struct *handle,
2331 const char *fname)
2332 {
2333 time_t timestamp;
2334 char *stripped;
2335 int ret, saved_errno;
2336 char *conv;
2337
2338 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname,
2339 &timestamp, &stripped)) {
2340 return -1;
2341 }
2342 if (timestamp == 0) {
2343 return SMB_VFS_NEXT_CHDIR(handle, fname);
2344 }
2345 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2346 TALLOC_FREE(stripped);
2347 if (conv == NULL) {
2348 return -1;
2349 }
2350 ret = SMB_VFS_NEXT_CHDIR(handle, conv);
2351 saved_errno = errno;
2352 TALLOC_FREE(conv);
2353 errno = saved_errno;
2354 return ret;
2355 }
2356
2357 static int snapper_gmt_ntimes(vfs_handle_struct *handle,
2358 const struct smb_filename *smb_fname,
2359 struct smb_file_time *ft)
2360 {
2361 time_t timestamp;
2362 char *stripped;
2363 int ret, saved_errno;
2364 struct smb_filename *conv;
2365
2366 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2367 smb_fname->base_name,
2368 &timestamp, &stripped)) {
2369 return -1;
2370 }
2371 if (timestamp == 0) {
2372 return SMB_VFS_NEXT_NTIMES(handle, smb_fname, ft);
2373 }
2374 conv = cp_smb_filename(talloc_tos(), smb_fname);
2375 if (conv == NULL) {
2376 errno = ENOMEM;
2377 return -1;
2378 }
2379 conv->base_name = snapper_gmt_convert(conv, handle,
2380 stripped, timestamp);
2381 TALLOC_FREE(stripped);
2382 if (conv->base_name == NULL) {
2383 return -1;
2384 }
2385 ret = SMB_VFS_NEXT_NTIMES(handle, conv, ft);
2386 saved_errno = errno;
2387 TALLOC_FREE(conv);
2388 errno = saved_errno;
2389 return ret;
2390 }
2391
2392 static int snapper_gmt_readlink(vfs_handle_struct *handle,
2393 const char *fname, char *buf, size_t bufsiz)
2394 {
2395 time_t timestamp;
2396 char *stripped;
2397 int ret, saved_errno;
2398 char *conv;
2399
2400 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname,
2401 &timestamp, &stripped)) {
2402 return -1;
2403 }
2404 if (timestamp == 0) {
2405 return SMB_VFS_NEXT_READLINK(handle, fname, buf, bufsiz);
2406 }
2407 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2408 TALLOC_FREE(stripped);
2409 if (conv == NULL) {
2410 return -1;
2411 }
2412 ret = SMB_VFS_NEXT_READLINK(handle, conv, buf, bufsiz);
2413 saved_errno = errno;
2414 TALLOC_FREE(conv);
2415 errno = saved_errno;
2416 return ret;
2417 }
2418
2419 static int snapper_gmt_mknod(vfs_handle_struct *handle,
2420 const char *fname, mode_t mode, SMB_DEV_T dev)
2421 {
2422 time_t timestamp;
2423 char *stripped;
2424 int ret, saved_errno;
2425 char *conv;
2426
2427 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname,
2428 &timestamp, &stripped)) {
2429 return -1;
2430 }
2431 if (timestamp == 0) {
2432 return SMB_VFS_NEXT_MKNOD(handle, fname, mode, dev);
2433 }
2434 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2435 TALLOC_FREE(stripped);
2436 if (conv == NULL) {
2437 return -1;
2438 }
2439 ret = SMB_VFS_NEXT_MKNOD(handle, conv, mode, dev);
2440 saved_errno = errno;
2441 TALLOC_FREE(conv);
2442 errno = saved_errno;
2443 return ret;
2444 }
2445
2446 static char *snapper_gmt_realpath(vfs_handle_struct *handle,
2447 const char *fname)
2448 {
2449 time_t timestamp;
2450 char *stripped = NULL;
2451 char *tmp = NULL;
2452 char *result = NULL;
2453 int saved_errno;
2454
2455 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname,
2456 &timestamp, &stripped)) {
2457 goto done;
2458 }
2459 if (timestamp == 0) {
2460 return SMB_VFS_NEXT_REALPATH(handle, fname);
2461 }
2462
2463 tmp = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2464 if (tmp == NULL) {
2465 goto done;
2466 }
2467
2468 result = SMB_VFS_NEXT_REALPATH(handle, tmp);
2469 if (result == NULL) {
2470 goto done;
2471 }
2472
2473 done:
2474 saved_errno = errno;
2475 TALLOC_FREE(tmp);
2476 TALLOC_FREE(stripped);
2477 errno = saved_errno;
2478 return result;
2479 }
2480
2481 static NTSTATUS snapper_gmt_fget_nt_acl(vfs_handle_struct *handle,
2482 struct files_struct *fsp,
2483 uint32_t security_info,
2484 TALLOC_CTX *mem_ctx,
2485 struct security_descriptor **ppdesc)
2486 {
2487 time_t timestamp;
2488 char *stripped;
2489 NTSTATUS status;
2490 char *conv;
2491 struct smb_filename *smb_fname = NULL;
2492
2493 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle,
2494 fsp->fsp_name->base_name,
2495 &timestamp, &stripped)) {
2496 return map_nt_error_from_unix(errno);
2497 }
2498 if (timestamp == 0) {
2499 return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp, security_info,
2500 mem_ctx,
2501 ppdesc);
2502 }
2503 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2504 TALLOC_FREE(stripped);
2505 if (conv == NULL) {
2506 return map_nt_error_from_unix(errno);
2507 }
2508
2509 smb_fname = synthetic_smb_fname(talloc_tos(),
2510 conv,
2511 NULL,
2512 NULL,
2513 fsp->fsp_name->flags);
2514 TALLOC_FREE(conv);
2515 if (smb_fname == NULL) {
2516 return NT_STATUS_NO_MEMORY;
2517 }
2518
2519 status = SMB_VFS_NEXT_GET_NT_ACL(handle, smb_fname, security_info,
2520 mem_ctx, ppdesc);
2521 TALLOC_FREE(smb_fname);
2522 return status;
2523 }
2524
2525 static NTSTATUS snapper_gmt_get_nt_acl(vfs_handle_struct *handle,
2526 const struct smb_filename *fname,
2527 uint32_t security_info,
2528 TALLOC_CTX *mem_ctx,
2529 struct security_descriptor **ppdesc)
2530 {
2531 time_t timestamp;
2532 char *stripped;
2533 NTSTATUS status;
2534 char *conv;
2535 struct smb_filename *smb_fname = NULL;
2536
2537 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname->base_name,
2538 &timestamp, &stripped)) {
2539 return map_nt_error_from_unix(errno);
2540 }
2541 if (timestamp == 0) {
2542 return SMB_VFS_NEXT_GET_NT_ACL(handle, fname, security_info,
2543 mem_ctx, ppdesc);
2544 }
2545 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2546 TALLOC_FREE(stripped);
2547 if (conv == NULL) {
2548 return map_nt_error_from_unix(errno);
2549 }
2550 smb_fname = synthetic_smb_fname(talloc_tos(),
2551 conv,
2552 NULL,
2553 NULL,
2554 fname->flags);
2555 TALLOC_FREE(conv);
2556 if (smb_fname == NULL) {
2557 return NT_STATUS_NO_MEMORY;
2558 }
2559
2560 status = SMB_VFS_NEXT_GET_NT_ACL(handle, smb_fname, security_info,
2561 mem_ctx, ppdesc);
2562 TALLOC_FREE(smb_fname);
2563 return status;
2564 }
2565
2566 static int snapper_gmt_mkdir(vfs_handle_struct *handle,
2567 const struct smb_filename *fname,
2568 mode_t mode)
2569 {
2570 time_t timestamp;
2571 char *stripped;
2572 int ret, saved_errno;
2573 char *conv;
2574 struct smb_filename *smb_fname = NULL;
2575
2576 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname->base_name,
2577 &timestamp, &stripped)) {
2578 return -1;
2579 }
2580 if (timestamp == 0) {
2581 return SMB_VFS_NEXT_MKDIR(handle, fname, mode);
2582 }
2583 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2584 TALLOC_FREE(stripped);
2585 if (conv == NULL) {
2586 return -1;
2587 }
2588 smb_fname = synthetic_smb_fname(talloc_tos(),
2589 conv,
2590 NULL,
2591 NULL,
2592 fname->flags);
2593 TALLOC_FREE(conv);
2594 if (smb_fname == NULL) {
2595 errno = ENOMEM;
2596 return -1;
2597 }
2598
2599 ret = SMB_VFS_NEXT_MKDIR(handle, smb_fname, mode);
2600 saved_errno = errno;
2601 TALLOC_FREE(smb_fname);
2602 errno = saved_errno;
2603 return ret;
2604 }
2605
2606 static int snapper_gmt_rmdir(vfs_handle_struct *handle,
2607 const struct smb_filename *fname)
2608 {
2609 time_t timestamp;
2610 char *stripped;
2611 int ret, saved_errno;
2612 char *conv;
2613 struct smb_filename *smb_fname = NULL;
2614
2615 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname->base_name,
2616 &timestamp, &stripped)) {
2617 return -1;
2618 }
2619 if (timestamp == 0) {
2620 return SMB_VFS_NEXT_RMDIR(handle, fname);
2621 }
2622 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2623 TALLOC_FREE(stripped);
2624 if (conv == NULL) {
2625 return -1;
2626 }
2627 smb_fname = synthetic_smb_fname(talloc_tos(),
2628 conv,
2629 NULL,
2630 NULL,
2631 fname->flags);
2632 TALLOC_FREE(conv);
2633 if (smb_fname == NULL) {
2634 errno = ENOMEM;
2635 return -1;
2636 }
2637 ret = SMB_VFS_NEXT_RMDIR(handle, smb_fname);
2638 saved_errno = errno;
2639 TALLOC_FREE(smb_fname);
2640 errno = saved_errno;
2641 return ret;
2642 }
2643
2644 static int snapper_gmt_chflags(vfs_handle_struct *handle, const char *fname,
2645 unsigned int flags)
2646 {
2647 time_t timestamp;
2648 char *stripped;
2649 int ret, saved_errno;
2650 char *conv;
2651
2652 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, fname,
2653 &timestamp, &stripped)) {
2654 return -1;
2655 }
2656 if (timestamp == 0) {
2657 return SMB_VFS_NEXT_CHFLAGS(handle, fname, flags);
2658 }
2659 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2660 TALLOC_FREE(stripped);
2661 if (conv == NULL) {
2662 return -1;
2663 }
2664 ret = SMB_VFS_NEXT_CHFLAGS(handle, conv, flags);
2665 saved_errno = errno;
2666 TALLOC_FREE(conv);
2667 errno = saved_errno;
2668 return ret;
2669 }
2670
2671 static ssize_t snapper_gmt_getxattr(vfs_handle_struct *handle,
2672 const struct smb_filename *smb_fname,
2673 const char *aname,
2674 void *value,
2675 size_t size)
2676 {
2677 time_t timestamp = 0;
2678 char *stripped = NULL;
2679 ssize_t ret;
2680 int saved_errno = 0;
2681 char *conv = NULL;
2682 struct smb_filename *conv_smb_fname = NULL;
2683
2684 if (!snapper_gmt_strip_snapshot(talloc_tos(),
2685 handle,
2686 smb_fname->base_name,
2687 &timestamp,
2688 &stripped)) {
2689 return -1;
2690 }
2691 if (timestamp == 0) {
2692 return SMB_VFS_NEXT_GETXATTR(handle, smb_fname, aname, value,
2693 size);
2694 }
2695 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2696 TALLOC_FREE(stripped);
2697 if (conv == NULL) {
2698 return -1;
2699 }
2700 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2701 conv,
2702 NULL,
2703 NULL,
2704 smb_fname->flags);
2705 TALLOC_FREE(conv);
2706 if (conv_smb_fname == NULL) {
2707 errno = ENOMEM;
2708 return -1;
2709 }
2710 ret = SMB_VFS_NEXT_GETXATTR(handle, conv_smb_fname, aname, value, size);
2711 if (ret == -1) {
2712 saved_errno = errno;
2713 }
2714 TALLOC_FREE(conv_smb_fname);
2715 TALLOC_FREE(conv);
2716 if (saved_errno != 0) {
2717 errno = saved_errno;
2718 }
2719 return ret;
2720 }
2721
2722 static ssize_t snapper_gmt_listxattr(struct vfs_handle_struct *handle,
2723 const struct smb_filename *smb_fname,
2724 char *list, size_t size)
2725 {
2726 time_t timestamp = 0;
2727 char *stripped = NULL;
2728 ssize_t ret;
2729 int saved_errno = 0;
2730 char *conv = NULL;
2731 struct smb_filename *conv_smb_fname = NULL;
2732
2733 if (!snapper_gmt_strip_snapshot(talloc_tos(),
2734 handle,
2735 smb_fname->base_name,
2736 &timestamp,
2737 &stripped)) {
2738 return -1;
2739 }
2740 if (timestamp == 0) {
2741 return SMB_VFS_NEXT_LISTXATTR(handle, smb_fname, list, size);
2742 }
2743 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2744 TALLOC_FREE(stripped);
2745 if (conv == NULL) {
2746 return -1;
2747 }
2748 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2749 conv,
2750 NULL,
2751 NULL,
2752 smb_fname->flags);
2753 TALLOC_FREE(conv);
2754 if (conv_smb_fname == NULL) {
2755 errno = ENOMEM;
2756 return -1;
2757 }
2758 ret = SMB_VFS_NEXT_LISTXATTR(handle, conv_smb_fname, list, size);
2759 if (ret == -1) {
2760 saved_errno = errno;
2761 }
2762 TALLOC_FREE(conv_smb_fname);
2763 TALLOC_FREE(conv);
2764 if (saved_errno != 0) {
2765 errno = saved_errno;
2766 }
2767 return ret;
2768 }
2769
2770 static int snapper_gmt_removexattr(vfs_handle_struct *handle,
2771 const struct smb_filename *smb_fname,
2772 const char *aname)
2773 {
2774 time_t timestamp = 0;
2775 char *stripped = NULL;
2776 ssize_t ret;
2777 int saved_errno = 0;
2778 char *conv = NULL;
2779 struct smb_filename *conv_smb_fname = NULL;
2780
2781 if (!snapper_gmt_strip_snapshot(talloc_tos(),
2782 handle,
2783 smb_fname->base_name,
2784 &timestamp,
2785 &stripped)) {
2786 return -1;
2787 }
2788 if (timestamp == 0) {
2789 return SMB_VFS_NEXT_REMOVEXATTR(handle, smb_fname, aname);
2790 }
2791 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2792 TALLOC_FREE(stripped);
2793 if (conv == NULL) {
2794 return -1;
2795 }
2796 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2797 conv,
2798 NULL,
2799 NULL,
2800 smb_fname->flags);
2801 TALLOC_FREE(conv);
2802 if (conv_smb_fname == NULL) {
2803 errno = ENOMEM;
2804 return -1;
2805 }
2806 ret = SMB_VFS_NEXT_REMOVEXATTR(handle, conv_smb_fname, aname);
2807 if (ret == -1) {
2808 saved_errno = errno;
2809 }
2810 TALLOC_FREE(conv_smb_fname);
2811 TALLOC_FREE(conv);
2812 if (saved_errno != 0) {
2813 errno = saved_errno;
2814 }
2815 return ret;
2816 }
2817
2818 static int snapper_gmt_setxattr(struct vfs_handle_struct *handle,
2819 const struct smb_filename *smb_fname,
2820 const char *aname, const void *value,
2821 size_t size, int flags)
2822 {
2823 time_t timestamp = 0;
2824 char *stripped = NULL;
2825 ssize_t ret;
2826 int saved_errno = 0;
2827 char *conv = NULL;
2828 struct smb_filename *conv_smb_fname = NULL;
2829
2830 if (!snapper_gmt_strip_snapshot(talloc_tos(),
2831 handle,
2832 smb_fname->base_name,
2833 &timestamp,
2834 &stripped)) {
2835 return -1;
2836 }
2837 if (timestamp == 0) {
2838 return SMB_VFS_NEXT_SETXATTR(handle, smb_fname,
2839 aname, value, size, flags);
2840 }
2841 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2842 TALLOC_FREE(stripped);
2843 if (conv == NULL) {
2844 return -1;
2845 }
2846 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2847 conv,
2848 NULL,
2849 NULL,
2850 smb_fname->flags);
2851 TALLOC_FREE(conv);
2852 if (conv_smb_fname == NULL) {
2853 errno = ENOMEM;
2854 return -1;
2855 }
2856 ret = SMB_VFS_NEXT_SETXATTR(handle, conv_smb_fname,
2857 aname, value, size, flags);
2858 if (ret == -1) {
2859 saved_errno = errno;
2860 }
2861 TALLOC_FREE(conv_smb_fname);
2862 TALLOC_FREE(conv);
2863 if (saved_errno != 0) {
2864 errno = saved_errno;
2865 }
2866 return ret;
2867 }
2868
2869 static int snapper_gmt_chmod_acl(vfs_handle_struct *handle,
2870 const struct smb_filename *smb_fname,
2871 mode_t mode)
2872 {
2873 time_t timestamp;
2874 char *stripped;
2875 ssize_t ret;
2876 int saved_errno;
2877 char *conv;
2878 struct smb_filename *conv_smb_fname = NULL;
2879
2880 if (!snapper_gmt_strip_snapshot(talloc_tos(),
2881 handle,
2882 smb_fname->base_name,
2883 &timestamp,
2884 &stripped)) {
2885 return -1;
2886 }
2887 if (timestamp == 0) {
2888 return SMB_VFS_NEXT_CHMOD_ACL(handle, smb_fname, mode);
2889 }
2890 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2891 TALLOC_FREE(stripped);
2892 if (conv == NULL) {
2893 return -1;
2894 }
2895 conv_smb_fname = synthetic_smb_fname(talloc_tos(),
2896 conv,
2897 NULL,
2898 NULL,
2899 smb_fname->flags);
2900 if (conv_smb_fname == NULL) {
2901 TALLOC_FREE(conv);
2902 errno = ENOMEM;
2903 return -1;
2904 }
2905 ret = SMB_VFS_NEXT_CHMOD_ACL(handle, conv_smb_fname, mode);
2906 saved_errno = errno;
2907 TALLOC_FREE(conv);
2908 TALLOC_FREE(conv_smb_fname);
2909 errno = saved_errno;
2910 return ret;
2911 }
2912
2913 static int snapper_gmt_get_real_filename(struct vfs_handle_struct *handle,
2914 const char *path,
2915 const char *name,
2916 TALLOC_CTX *mem_ctx,
2917 char **found_name)
2918 {
2919 time_t timestamp;
2920 char *stripped;
2921 ssize_t ret;
2922 int saved_errno;
2923 char *conv;
2924
2925 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, path,
2926 &timestamp, &stripped)) {
2927 return -1;
2928 }
2929 if (timestamp == 0) {
2930 return SMB_VFS_NEXT_GET_REAL_FILENAME(handle, path, name,
2931 mem_ctx, found_name);
2932 }
2933 if (stripped[0] == '\0') {
2934 *found_name = talloc_strdup(mem_ctx, name);
2935 if (*found_name == NULL) {
2936 errno = ENOMEM;
2937 return -1;
2938 }
2939 return 0;
2940 }
2941 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2942 TALLOC_FREE(stripped);
2943 if (conv == NULL) {
2944 return -1;
2945 }
2946 ret = SMB_VFS_NEXT_GET_REAL_FILENAME(handle, conv, name,
2947 mem_ctx, found_name);
2948 saved_errno = errno;
2949 TALLOC_FREE(conv);
2950 errno = saved_errno;
2951 return ret;
2952 }
2953
2954 static uint64_t snapper_gmt_disk_free(vfs_handle_struct *handle,
2955 const char *path, uint64_t *bsize,
2956 uint64_t *dfree, uint64_t *dsize)
2957 {
2958 time_t timestamp;
2959 char *stripped;
2960 ssize_t ret;
2961 int saved_errno;
2962 char *conv;
2963
2964 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, path,
2965 &timestamp, &stripped)) {
2966 return -1;
2967 }
2968 if (timestamp == 0) {
2969 return SMB_VFS_NEXT_DISK_FREE(handle, path,
2970 bsize, dfree, dsize);
2971 }
2972
2973 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
2974 TALLOC_FREE(stripped);
2975 if (conv == NULL) {
2976 return -1;
2977 }
2978
2979 ret = SMB_VFS_NEXT_DISK_FREE(handle, conv, bsize, dfree, dsize);
2980
2981 saved_errno = errno;
2982 TALLOC_FREE(conv);
2983 errno = saved_errno;
2984
2985 return ret;
2986 }
2987
2988 static int snapper_gmt_get_quota(vfs_handle_struct *handle, const char *path,
2989 enum SMB_QUOTA_TYPE qtype, unid_t id,
2990 SMB_DISK_QUOTA *dq)
2991 {
2992 time_t timestamp;
2993 char *stripped;
2994 int ret;
2995 int saved_errno;
2996 char *conv;
2997
2998 if (!snapper_gmt_strip_snapshot(talloc_tos(), handle, path, &timestamp,
2999 &stripped)) {
3000 return -1;
3001 }
3002 if (timestamp == 0) {
3003 return SMB_VFS_NEXT_GET_QUOTA(handle, path, qtype, id, dq);
3004 }
3005
3006 conv = snapper_gmt_convert(talloc_tos(), handle, stripped, timestamp);
3007 TALLOC_FREE(stripped);
3008 if (conv == NULL) {
3009 return -1;
3010 }
3011
3012 ret = SMB_VFS_NEXT_GET_QUOTA(handle, conv, qtype, id, dq);
3013
3014 saved_errno = errno;
3015 TALLOC_FREE(conv);
3016 errno = saved_errno;
3017
3018 return ret;
3019 }
3020
3021
3022 static struct vfs_fn_pointers snapper_fns = {
3023 .snap_check_path_fn = snapper_snap_check_path,
3024 .snap_create_fn = snapper_snap_create,
3025 .snap_delete_fn = snapper_snap_delete,
3026 .get_shadow_copy_data_fn = snapper_get_shadow_copy_data,
3027 .opendir_fn = snapper_gmt_opendir,
3028 .disk_free_fn = snapper_gmt_disk_free,
3029 .get_quota_fn = snapper_gmt_get_quota,
3030 .rename_fn = snapper_gmt_rename,
3031 .link_fn = snapper_gmt_link,
3032 .symlink_fn = snapper_gmt_symlink,
3033 .stat_fn = snapper_gmt_stat,
3034 .lstat_fn = snapper_gmt_lstat,
3035 .fstat_fn = snapper_gmt_fstat,
3036 .open_fn = snapper_gmt_open,
3037 .unlink_fn = snapper_gmt_unlink,
3038 .chmod_fn = snapper_gmt_chmod,
3039 .chown_fn = snapper_gmt_chown,
3040 .chdir_fn = snapper_gmt_chdir,
3041 .ntimes_fn = snapper_gmt_ntimes,
3042 .readlink_fn = snapper_gmt_readlink,
3043 .mknod_fn = snapper_gmt_mknod,
3044 .realpath_fn = snapper_gmt_realpath,
3045 .get_nt_acl_fn = snapper_gmt_get_nt_acl,
3046 .fget_nt_acl_fn = snapper_gmt_fget_nt_acl,
3047 .mkdir_fn = snapper_gmt_mkdir,
3048 .rmdir_fn = snapper_gmt_rmdir,
3049 .getxattr_fn = snapper_gmt_getxattr,
3050 .listxattr_fn = snapper_gmt_listxattr,
3051 .removexattr_fn = snapper_gmt_removexattr,
3052 .setxattr_fn = snapper_gmt_setxattr,
3053 .chmod_acl_fn = snapper_gmt_chmod_acl,
3054 .chflags_fn = snapper_gmt_chflags,
3055 .get_real_filename_fn = snapper_gmt_get_real_filename,
3056 };
3057
3058 NTSTATUS vfs_snapper_init(TALLOC_CTX *);
3059 NTSTATUS vfs_snapper_init(TALLOC_CTX *ctx)
3060 {
3061 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
3062 "snapper", &snapper_fns);
3063 }
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