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ctdb-common: replace talloc / memcpy by talloc_memdup
[Samba.git] / source3 / registry / reg_backend_db.c
blob928572e8a5a1644e8e25581365058700b8bd05de
1 /*
2 * Unix SMB/CIFS implementation.
3 * Virtual Windows Registry Layer
4 * Copyright (C) Gerald Carter 2002-2005
5 * Copyright (C) Michael Adam 2007-2011
6 * Copyright (C) Gregor Beck 2011
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 3 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, see <http://www.gnu.org/licenses/>.
20 */
21
22 /* Implementation of internal registry database functions. */
23
24 #include "includes.h"
25 #include "system/filesys.h"
26 #include "registry.h"
27 #include "reg_db.h"
28 #include "reg_util_internal.h"
29 #include "reg_parse_internal.h"
30 #include "reg_backend_db.h"
31 #include "reg_objects.h"
32 #include "nt_printing.h"
33 #include "util_tdb.h"
34 #include "dbwrap/dbwrap.h"
35 #include "dbwrap/dbwrap_open.h"
36 #include "../libcli/security/secdesc.h"
37
38 #undef DBGC_CLASS
39 #define DBGC_CLASS DBGC_REGISTRY
40
41 #define REGDB_VERSION_KEYNAME "INFO/version"
42
43 static struct db_context *regdb = NULL;
44 static int regdb_refcount;
45
46 static bool regdb_key_exists(struct db_context *db, const char *key);
47 static WERROR regdb_fetch_keys_internal(struct db_context *db, const char *key,
48 struct regsubkey_ctr *ctr);
49 static bool regdb_store_keys_internal(struct db_context *db, const char *key,
50 struct regsubkey_ctr *ctr);
51 static int regdb_fetch_values_internal(struct db_context *db, const char* key,
52 struct regval_ctr *values);
53 static NTSTATUS regdb_store_values_internal(struct db_context *db, const char *key,
54 struct regval_ctr *values);
55 static WERROR regdb_store_subkey_list(struct db_context *db, const char *parent,
56 const char *key);
57
58 static WERROR regdb_create_basekey(struct db_context *db, const char *key);
59 static WERROR regdb_create_subkey_internal(struct db_context *db,
60 const char *key,
61 const char *subkey);
62
63
64 struct regdb_trans_ctx {
65 NTSTATUS (*action)(struct db_context *, void *);
66 void *private_data;
67 };
68
69 static NTSTATUS regdb_trans_do_action(struct db_context *db, void *private_data)
70 {
71 NTSTATUS status;
72 int32_t version_id;
73 struct regdb_trans_ctx *ctx = (struct regdb_trans_ctx *)private_data;
74
75 status = dbwrap_fetch_int32_bystring(db, REGDB_VERSION_KEYNAME,
76 &version_id);
77
78 if (!NT_STATUS_IS_OK(status)) {
79 DEBUG(0, ("ERROR: could not fetch registry db version: %s. "
80 "Denying access.\n", nt_errstr(status)));
81 return NT_STATUS_ACCESS_DENIED;
82 }
83
84 if (version_id != REGDB_CODE_VERSION) {
85 DEBUG(0, ("ERROR: changed registry version %d found while "
86 "trying to write to the registry. Version %d "
87 "expected. Denying access.\n",
88 version_id, REGDB_CODE_VERSION));
89 return NT_STATUS_ACCESS_DENIED;
90 }
91
92 status = ctx->action(db, ctx->private_data);
93 return status;
94 }
95
96 static WERROR regdb_trans_do(struct db_context *db,
97 NTSTATUS (*action)(struct db_context *, void *),
98 void *private_data)
99 {
100 NTSTATUS status;
101 struct regdb_trans_ctx ctx;
102
103
104 ctx.action = action;
105 ctx.private_data = private_data;
106
107 status = dbwrap_trans_do(db, regdb_trans_do_action, &ctx);
108
109 return ntstatus_to_werror(status);
110 }
111
112 /* List the deepest path into the registry. All part components will be created.*/
113
114 /* If you want to have a part of the path controlled by the tdb and part by
115 a virtual registry db (e.g. printing), then you have to list the deepest path.
116 For example,"HKLM/SOFTWARE/Microsoft/Windows NT/CurrentVersion/Print"
117 allows the reg_db backend to handle everything up to
118 "HKLM/SOFTWARE/Microsoft/Windows NT/CurrentVersion" and then we'll hook
119 the reg_printing backend onto the last component of the path (see
120 KEY_PRINTING_2K in include/rpc_reg.h) --jerry */
121
122 static const char *builtin_registry_paths[] = {
123 KEY_PRINTING_2K,
124 KEY_PCC,
125 KEY_PRINTING_PORTS,
126 KEY_PRINTING,
127 KEY_PRINTING "\\Forms",
128 KEY_PRINTING "\\Printers",
129 KEY_PRINTING "\\Environments\\Windows NT x86\\Print Processors\\winprint",
130 KEY_PRINTING "\\Environments\\Windows x64\\Print Processors\\winprint",
131 KEY_SHARES,
132 KEY_EVENTLOG,
133 KEY_SMBCONF,
134 KEY_PERFLIB,
135 KEY_PERFLIB_009,
136 KEY_GROUP_POLICY,
137 KEY_SAMBA_GROUP_POLICY,
138 KEY_GP_MACHINE_POLICY,
139 KEY_GP_MACHINE_WIN_POLICY,
140 KEY_HKCU,
141 KEY_GP_USER_POLICY,
142 KEY_GP_USER_WIN_POLICY,
143 "HKLM\\Software\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\GPExtensions",
144 "HKLM\\SYSTEM\\CurrentControlSet\\Control\\Print\\Monitors",
145 KEY_PROD_OPTIONS,
146 "HKLM\\SYSTEM\\CurrentControlSet\\Control\\Terminal Server\\DefaultUserConfiguration",
147 KEY_TCPIP_PARAMS,
148 KEY_NETLOGON_PARAMS,
149 KEY_HKU,
150 KEY_HKCR,
151 KEY_HKPD,
152 KEY_HKPT,
153 NULL };
154
155 struct builtin_regkey_value {
156 const char *path;
157 const char *valuename;
158 uint32_t type;
159 union {
160 const char *string;
161 uint32_t dw_value;
162 } data;
163 };
164
165 static struct builtin_regkey_value builtin_registry_values[] = {
166 { KEY_PRINTING_PORTS,
167 SAMBA_PRINTER_PORT_NAME, REG_SZ, { "" } },
168 { KEY_PRINTING_2K,
169 "DefaultSpoolDirectory", REG_SZ, { "C:\\Windows\\System32\\Spool\\Printers" } },
170 { KEY_EVENTLOG,
171 "DisplayName", REG_SZ, { "Event Log" } },
172 { KEY_EVENTLOG,
173 "ErrorControl", REG_DWORD, { (char*)0x00000001 } },
174 { NULL, NULL, 0, { NULL } }
175 };
176
177 static WERROR create_key_recursive(struct db_context *db,
178 char *path,
179 const char *subkey)
180 {
181 WERROR werr;
182 char *p;
183
184 if (subkey == NULL) {
185 return WERR_INVALID_PARAMETER;
186 }
187
188 if (path == NULL) {
189 return regdb_create_basekey(db, subkey);
190 }
191
192 p = strrchr_m(path, '\\');
193
194 if (p == NULL) {
195 werr = create_key_recursive(db, NULL, path);
196 } else {
197 *p = '\0';
198 werr = create_key_recursive(db, path, p+1);
199 *p = '\\';
200 }
201
202 if (!W_ERROR_IS_OK(werr)) {
203 goto done;
204 }
205
206 werr = regdb_create_subkey_internal(db, path, subkey);
207
208 done:
209 return werr;
210 }
211
212 /**
213 * Initialize a key in the registry:
214 * create each component key of the specified path.
215 */
216 static WERROR init_registry_key_internal(struct db_context *db,
217 const char *add_path)
218 {
219 char *subkey, *key;
220 WERROR werr;
221 TALLOC_CTX *frame = talloc_stackframe();
222
223 if (add_path == NULL) {
224 werr = WERR_INVALID_PARAMETER;
225 goto done;
226 }
227
228 key = talloc_strdup(frame, add_path);
229
230 subkey = strrchr_m(key, '\\');
231 if (subkey == NULL) {
232 subkey = key;
233 key = NULL;
234 } else {
235 *subkey = '\0';
236 subkey++;
237 }
238
239 werr = create_key_recursive(db, key, subkey);
240
241 done:
242 talloc_free(frame);
243 return werr;
244 }
245
246 struct init_registry_key_context {
247 const char *add_path;
248 };
249
250 static NTSTATUS init_registry_key_action(struct db_context *db,
251 void *private_data)
252 {
253 struct init_registry_key_context *init_ctx =
254 (struct init_registry_key_context *)private_data;
255
256 return werror_to_ntstatus(init_registry_key_internal(
257 db, init_ctx->add_path));
258 }
259
260 /**
261 * Initialize a key in the registry:
262 * create each component key of the specified path,
263 * wrapped in one db transaction.
264 */
265 WERROR init_registry_key(const char *add_path)
266 {
267 struct init_registry_key_context init_ctx;
268
269 if (regdb_key_exists(regdb, add_path)) {
270 return WERR_OK;
271 }
272
273 init_ctx.add_path = add_path;
274
275 return regdb_trans_do(regdb,
276 init_registry_key_action,
277 &init_ctx);
278 }
279
280 /***********************************************************************
281 Open the registry data in the tdb
282 ***********************************************************************/
283
284 static void regdb_ctr_add_value(struct regval_ctr *ctr,
285 struct builtin_regkey_value *value)
286 {
287 switch(value->type) {
288 case REG_DWORD:
289 regval_ctr_addvalue(ctr, value->valuename, REG_DWORD,
290 (uint8_t *)&value->data.dw_value,
291 sizeof(uint32_t));
292 break;
293
294 case REG_SZ:
295 regval_ctr_addvalue_sz(ctr, value->valuename,
296 value->data.string);
297 break;
298
299 default:
300 DEBUG(0, ("regdb_ctr_add_value: invalid value type in "
301 "registry values [%d]\n", value->type));
302 }
303 }
304
305 static NTSTATUS init_registry_data_action(struct db_context *db,
306 void *private_data)
307 {
308 NTSTATUS status;
309 TALLOC_CTX *frame = talloc_stackframe();
310 struct regval_ctr *values;
311 int i;
312
313 /* loop over all of the predefined paths and add each component */
314
315 for (i=0; builtin_registry_paths[i] != NULL; i++) {
316 if (regdb_key_exists(db, builtin_registry_paths[i])) {
317 continue;
318 }
319 status = werror_to_ntstatus(init_registry_key_internal(db,
320 builtin_registry_paths[i]));
321 if (!NT_STATUS_IS_OK(status)) {
322 goto done;
323 }
324 }
325
326 /* loop over all of the predefined values and add each component */
327
328 for (i=0; builtin_registry_values[i].path != NULL; i++) {
329 WERROR werr;
330
331 werr = regval_ctr_init(frame, &values);
332 if (!W_ERROR_IS_OK(werr)) {
333 status = werror_to_ntstatus(werr);
334 goto done;
335 }
336
337 regdb_fetch_values_internal(db,
338 builtin_registry_values[i].path,
339 values);
340
341 /* preserve existing values across restarts. Only add new ones */
342
343 if (!regval_ctr_value_exists(values,
344 builtin_registry_values[i].valuename))
345 {
346 regdb_ctr_add_value(values,
347 &builtin_registry_values[i]);
348 status = regdb_store_values_internal(db,
349 builtin_registry_values[i].path,
350 values);
351 if (!NT_STATUS_IS_OK(status)) {
352 goto done;
353 }
354 }
355 TALLOC_FREE(values);
356 }
357
358 status = NT_STATUS_OK;
359
360 done:
361
362 TALLOC_FREE(frame);
363 return status;
364 }
365
366 WERROR init_registry_data(void)
367 {
368 WERROR werr;
369 TALLOC_CTX *frame = talloc_stackframe();
370 struct regval_ctr *values;
371 int i;
372
373 /*
374 * First, check for the existence of the needed keys and values.
375 * If all do already exist, we can save the writes.
376 */
377 for (i=0; builtin_registry_paths[i] != NULL; i++) {
378 if (!regdb_key_exists(regdb, builtin_registry_paths[i])) {
379 goto do_init;
380 }
381 }
382
383 for (i=0; builtin_registry_values[i].path != NULL; i++) {
384 werr = regval_ctr_init(frame, &values);
385 W_ERROR_NOT_OK_GOTO_DONE(werr);
386
387 regdb_fetch_values_internal(regdb,
388 builtin_registry_values[i].path,
389 values);
390 if (!regval_ctr_value_exists(values,
391 builtin_registry_values[i].valuename))
392 {
393 TALLOC_FREE(values);
394 goto do_init;
395 }
396
397 TALLOC_FREE(values);
398 }
399
400 werr = WERR_OK;
401 goto done;
402
403 do_init:
404
405 /*
406 * There are potentially quite a few store operations which are all
407 * indiviually wrapped in tdb transactions. Wrapping them in a single
408 * transaction gives just a single transaction_commit() to actually do
409 * its fsync()s. See tdb/common/transaction.c for info about nested
410 * transaction behaviour.
411 */
412
413 werr = regdb_trans_do(regdb,
414 init_registry_data_action,
415 NULL);
416
417 done:
418 TALLOC_FREE(frame);
419 return werr;
420 }
421
422 static int regdb_normalize_keynames_fn(struct db_record *rec,
423 void *private_data)
424 {
425 TALLOC_CTX *mem_ctx = talloc_tos();
426 const char *keyname;
427 NTSTATUS status;
428 TDB_DATA key;
429 TDB_DATA value;
430 struct db_context *db = (struct db_context *)private_data;
431
432 key = dbwrap_record_get_key(rec);
433 if (key.dptr == NULL || key.dsize == 0) {
434 return 0;
435 }
436
437 value = dbwrap_record_get_value(rec);
438
439 if (db == NULL) {
440 DEBUG(0, ("regdb_normalize_keynames_fn: ERROR: "
441 "NULL db context handed in via private_data\n"));
442 return 1;
443 }
444
445 if (strncmp((const char *)key.dptr, REGDB_VERSION_KEYNAME,
446 strlen(REGDB_VERSION_KEYNAME)) == 0)
447 {
448 return 0;
449 }
450
451 keyname = strchr((const char *)key.dptr, '/');
452 if (keyname) {
453 keyname = talloc_string_sub(mem_ctx,
454 (const char *)key.dptr,
455 "/",
456 "\\");
457
458 DEBUG(2, ("regdb_normalize_keynames_fn: Convert %s to %s\n",
459 (const char *)key.dptr,
460 keyname));
461
462 /* Delete the original record and store the normalized key */
463 status = dbwrap_record_delete(rec);
464 if (!NT_STATUS_IS_OK(status)) {
465 DEBUG(0,("regdb_normalize_keynames_fn: "
466 "tdb_delete for [%s] failed!\n",
467 (const char *)key.dptr));
468 return 1;
469 }
470
471 status = dbwrap_store_bystring(db, keyname, value, TDB_REPLACE);
472 if (!NT_STATUS_IS_OK(status)) {
473 DEBUG(0,("regdb_normalize_keynames_fn: "
474 "failed to store new record for [%s]!\n",
475 keyname));
476 return 1;
477 }
478 }
479
480 return 0;
481 }
482
483 static WERROR regdb_store_regdb_version(struct db_context *db, uint32_t version)
484 {
485 NTSTATUS status;
486 if (db == NULL) {
487 return WERR_CAN_NOT_COMPLETE;
488 }
489
490 status = dbwrap_trans_store_int32_bystring(db, REGDB_VERSION_KEYNAME,
491 version);
492 if (!NT_STATUS_IS_OK(status)) {
493 DEBUG(1, ("regdb_store_regdb_version: error storing %s = %d: %s\n",
494 REGDB_VERSION_KEYNAME, version, nt_errstr(status)));
495 return ntstatus_to_werror(status);
496 } else {
497 DEBUG(10, ("regdb_store_regdb_version: stored %s = %d\n",
498 REGDB_VERSION_KEYNAME, version));
499 return WERR_OK;
500 }
501 }
502
503 static WERROR regdb_upgrade_v1_to_v2(struct db_context *db)
504 {
505 TALLOC_CTX *mem_ctx;
506 NTSTATUS status;
507 WERROR werr;
508
509 mem_ctx = talloc_stackframe();
510
511 status = dbwrap_traverse(db, regdb_normalize_keynames_fn, db, NULL);
512 if (!NT_STATUS_IS_OK(status)) {
513 werr = WERR_REGISTRY_IO_FAILED;
514 goto done;
515 }
516
517 werr = regdb_store_regdb_version(db, REGDB_VERSION_V2);
518
519 done:
520 talloc_free(mem_ctx);
521 return werr;
522 }
523
524 static bool tdb_data_read_uint32(TDB_DATA *buf, uint32_t *result)
525 {
526 const size_t len = sizeof(uint32_t);
527 if (buf->dsize >= len) {
528 *result = IVAL(buf->dptr, 0);
529 buf->dptr += len;
530 buf->dsize -= len;
531 return true;
532 }
533 return false;
534 }
535
536 static bool tdb_data_read_cstr(TDB_DATA *buf, char **result)
537 {
538 const size_t len = strnlen((char*)buf->dptr, buf->dsize) + 1;
539 if (buf->dsize >= len) {
540 *result = (char*)buf->dptr;
541 buf->dptr += len;
542 buf->dsize -= len;
543 return true;
544 }
545 return false;
546 }
547
548 static bool tdb_data_is_cstr(TDB_DATA d) {
549 if (tdb_data_is_empty(d) || (d.dptr[d.dsize-1] != '\0')) {
550 return false;
551 }
552 return strlen((char *)d.dptr) == (d.dsize-1);
553 }
554
555 static bool upgrade_v2_to_v3_check_subkeylist(struct db_context *db,
556 const char *key,
557 const char *subkey)
558 {
559 static uint32_t zero = 0;
560 static TDB_DATA empty_subkey_list = {
561 .dptr = (unsigned char*)&zero,
562 .dsize = sizeof(uint32_t),
563 };
564 bool success = false;
565 char *path = talloc_asprintf(talloc_tos(), "%s\\%s", key, subkey);
566 if (!strupper_m(path)) {
567 goto done;
568 }
569
570 if (!dbwrap_exists(db, string_term_tdb_data(path))) {
571 NTSTATUS status;
572
573 DEBUG(10, ("regdb_upgrade_v2_to_v3: writing subkey list [%s]\n",
574 path));
575
576 status = dbwrap_store_bystring(db, path, empty_subkey_list,
577 TDB_INSERT);
578 if (!NT_STATUS_IS_OK(status)) {
579 DEBUG(0, ("regdb_upgrade_v2_to_v3: writing subkey list "
580 "[%s] failed\n", path));
581 goto done;
582 }
583 }
584 success = true;
585 done:
586 talloc_free(path);
587 return success;
588 }
589
590 static bool upgrade_v2_to_v3_check_parent(struct db_context *db,
591 const char *key)
592 {
593 const char *sep = strrchr_m(key, '\\');
594 if (sep != NULL) {
595 char *pkey = talloc_strndup(talloc_tos(), key, sep-key);
596 if (!dbwrap_exists(db, string_term_tdb_data(pkey))) {
597 DEBUG(0, ("regdb_upgrade_v2_to_v3: missing subkey list "
598 "[%s]\nrun \"net registry check\"\n", pkey));
599 }
600 talloc_free(pkey);
601 }
602 return true;
603 }
604
605
606 #define IS_EQUAL(d,s) (((d).dsize == strlen(s)+1) && \
607 (strcmp((char*)(d).dptr, (s)) == 0))
608 #define STARTS_WITH(d,s) (((d).dsize > strlen(s)) && \
609 (strncmp((char*)(d).dptr, (s), strlen(s)) == 0))
610 #define SSTR(d) (int)(d).dsize , (char*)(d).dptr
611
612
613 static int regdb_upgrade_v2_to_v3_fn(struct db_record *rec, void *private_data)
614 {
615 struct db_context *db = (struct db_context *)private_data;
616 TDB_DATA key = dbwrap_record_get_key(rec);
617 TDB_DATA val = dbwrap_record_get_value(rec);
618
619 if (tdb_data_is_empty(key)) {
620 return 0;
621 }
622
623 if (db == NULL) {
624 DEBUG(0, ("regdb_upgrade_v2_to_v3_fn: ERROR: "
625 "NULL db context handed in via private_data\n"));
626 return 1;
627 }
628
629 if (IS_EQUAL(key, REGDB_VERSION_KEYNAME) ||
630 STARTS_WITH(key, REG_VALUE_PREFIX) ||
631 STARTS_WITH(key, REG_SECDESC_PREFIX))
632 {
633 DEBUG(10, ("regdb_upgrade_v2_to_v3: skipping [%.*s]\n",
634 SSTR(key)));
635 return 0;
636 }
637
638 if (STARTS_WITH(key, REG_SORTED_SUBKEYS_PREFIX)) {
639 NTSTATUS status;
640 /* Delete the deprecated sorted subkeys cache. */
641
642 DEBUG(10, ("regdb_upgrade_v2_to_v3: deleting [%.*s]\n",
643 SSTR(key)));
644
645 status = dbwrap_record_delete(rec);
646 if (!NT_STATUS_IS_OK(status)) {
647 DEBUG(0, ("regdb_upgrade_v2_to_v3: deleting [%.*s] "
648 "failed!\n", SSTR(key)));
649 return 1;
650 }
651
652 return 0;
653 }
654
655 if ( tdb_data_is_cstr(key) &&
656 hive_info((char*)key.dptr) != NULL )
657 {
658 /*
659 * Found a regular subkey list record.
660 * Walk the list and create the list record for those
661 * subkeys that don't already have one.
662 */
663 TDB_DATA pos = val;
664 char *subkey, *path = (char*)key.dptr;
665 uint32_t num_items, found_items = 0;
666
667
668 DEBUG(10, ("regdb_upgrade_v2_to_v3: scanning subkeylist of "
669 "[%s]\n", path));
670
671 if (!tdb_data_read_uint32(&pos, &num_items)) {
672 /* invalid or empty - skip */
673 return 0;
674 }
675
676 while (tdb_data_read_cstr(&pos, &subkey)) {
677 found_items++;
678
679 if (!upgrade_v2_to_v3_check_subkeylist(db, path, subkey))
680 {
681 return 1;
682 }
683
684 if (!upgrade_v2_to_v3_check_parent(db, path)) {
685 return 1;
686 }
687 }
688 if (found_items != num_items) {
689 DEBUG(0, ("regdb_upgrade_v2_to_v3: inconsistent subkey "
690 "list [%s]\nrun \"net registry check\"\n",
691 path));
692 }
693 } else {
694 DEBUG(10, ("regdb_upgrade_v2_to_v3: skipping invalid [%.*s]\n"
695 "run \"net registry check\"\n", SSTR(key)));
696 }
697
698 return 0;
699 }
700
701 static WERROR regdb_upgrade_v2_to_v3(struct db_context *db)
702 {
703 NTSTATUS status;
704 WERROR werr;
705
706 status = dbwrap_traverse(db, regdb_upgrade_v2_to_v3_fn, db, NULL);
707 if (!NT_STATUS_IS_OK(status)) {
708 werr = WERR_REGISTRY_IO_FAILED;
709 goto done;
710 }
711
712 werr = regdb_store_regdb_version(db, REGDB_VERSION_V3);
713
714 done:
715 return werr;
716 }
717
718 /***********************************************************************
719 Open the registry database
720 ***********************************************************************/
721
722 WERROR regdb_init(void)
723 {
724 int32_t vers_id;
725 WERROR werr;
726 NTSTATUS status;
727 char *db_path;
728
729 if (regdb) {
730 DEBUG(10, ("regdb_init: incrementing refcount (%d->%d)\n",
731 regdb_refcount, regdb_refcount+1));
732 regdb_refcount++;
733 return WERR_OK;
734 }
735
736 db_path = state_path("registry.tdb");
737 if (db_path == NULL) {
738 return WERR_NOT_ENOUGH_MEMORY;
739 }
740
741 regdb = db_open(NULL, db_path, 0,
742 REG_TDB_FLAGS, O_RDWR, 0600,
743 DBWRAP_LOCK_ORDER_1, REG_DBWRAP_FLAGS);
744 if (!regdb) {
745 regdb = db_open(NULL, db_path, 0,
746 REG_TDB_FLAGS, O_RDWR|O_CREAT, 0600,
747 DBWRAP_LOCK_ORDER_1, REG_DBWRAP_FLAGS);
748 if (!regdb) {
749 werr = ntstatus_to_werror(map_nt_error_from_unix(errno));
750 DEBUG(1,("regdb_init: Failed to open registry %s (%s)\n",
751 db_path, strerror(errno) ));
752 TALLOC_FREE(db_path);
753 return werr;
754 }
755
756 werr = regdb_store_regdb_version(regdb, REGDB_CODE_VERSION);
757 if (!W_ERROR_IS_OK(werr)) {
758 DEBUG(1, ("regdb_init: Failed to store version: %s\n",
759 win_errstr(werr)));
760 TALLOC_FREE(db_path);
761 return werr;
762 }
763
764 DEBUG(10,("regdb_init: Successfully created registry tdb\n"));
765 }
766 TALLOC_FREE(db_path);
767
768 regdb_refcount = 1;
769 DEBUG(10, ("regdb_init: registry db openend. refcount reset (%d)\n",
770 regdb_refcount));
771
772 status = dbwrap_fetch_int32_bystring(regdb, REGDB_VERSION_KEYNAME,
773 &vers_id);
774 if (!NT_STATUS_IS_OK(status)) {
775 DEBUG(10, ("regdb_init: registry version uninitialized "
776 "(got %d), initializing to version %d\n",
777 vers_id, REGDB_VERSION_V1));
778
779 /*
780 * There was a regdb format version prior to version 1
781 * which did not store a INFO/version key. The format
782 * of this version was identical to version 1 except for
783 * the lack of the sorted subkey cache records.
784 * Since these are disposable, we can safely assume version
785 * 1 if no INFO/version key is found and run the db through
786 * the whole chain of upgrade. If the database was not
787 * initialized, this does not harm. If it was the unversioned
788 * version ("0"), then it do the right thing with the records.
789 */
790 werr = regdb_store_regdb_version(regdb, REGDB_VERSION_V1);
791 if (!W_ERROR_IS_OK(werr)) {
792 return werr;
793 }
794 vers_id = REGDB_VERSION_V1;
795 }
796
797 if (vers_id == REGDB_CODE_VERSION) {
798 return WERR_OK;
799 }
800
801 if (vers_id > REGDB_CODE_VERSION || vers_id == 0) {
802 DEBUG(0, ("regdb_init: unknown registry version %d "
803 "(code version = %d), refusing initialization\n",
804 vers_id, REGDB_CODE_VERSION));
805 return WERR_CAN_NOT_COMPLETE;
806 }
807
808 if (dbwrap_transaction_start(regdb) != 0) {
809 return WERR_REGISTRY_IO_FAILED;
810 }
811
812 if (vers_id == REGDB_VERSION_V1) {
813 DEBUG(10, ("regdb_init: upgrading registry from version %d "
814 "to %d\n", REGDB_VERSION_V1, REGDB_VERSION_V2));
815
816 werr = regdb_upgrade_v1_to_v2(regdb);
817 if (!W_ERROR_IS_OK(werr)) {
818 dbwrap_transaction_cancel(regdb);
819 return werr;
820 }
821
822 vers_id = REGDB_VERSION_V2;
823 }
824
825 if (vers_id == REGDB_VERSION_V2) {
826 DEBUG(10, ("regdb_init: upgrading registry from version %d "
827 "to %d\n", REGDB_VERSION_V2, REGDB_VERSION_V3));
828
829 werr = regdb_upgrade_v2_to_v3(regdb);
830 if (!W_ERROR_IS_OK(werr)) {
831 dbwrap_transaction_cancel(regdb);
832 return werr;
833 }
834
835 vers_id = REGDB_VERSION_V3;
836 }
837
838 /* future upgrade code should go here */
839
840 if (dbwrap_transaction_commit(regdb) != 0) {
841 return WERR_REGISTRY_IO_FAILED;
842 }
843
844 return WERR_OK;
845 }
846
847 /***********************************************************************
848 Open the registry. Must already have been initialized by regdb_init()
849 ***********************************************************************/
850
851 WERROR regdb_open( void )
852 {
853 WERROR result = WERR_OK;
854 char *db_path;
855 int saved_errno;
856
857 if ( regdb ) {
858 DEBUG(10, ("regdb_open: incrementing refcount (%d->%d)\n",
859 regdb_refcount, regdb_refcount+1));
860 regdb_refcount++;
861 return WERR_OK;
862 }
863
864 db_path = state_path("registry.tdb");
865 if (db_path == NULL) {
866 return WERR_NOT_ENOUGH_MEMORY;
867 }
868
869 become_root();
870
871 regdb = db_open(NULL, db_path, 0,
872 REG_TDB_FLAGS, O_RDWR, 0600,
873 DBWRAP_LOCK_ORDER_1, REG_DBWRAP_FLAGS);
874 saved_errno = errno;
875 unbecome_root();
876 if ( !regdb ) {
877 result = ntstatus_to_werror(map_nt_error_from_unix(saved_errno));
878 DEBUG(0,("regdb_open: Failed to open %s! (%s)\n",
879 db_path, strerror(saved_errno)));
880 TALLOC_FREE(db_path);
881 return result;
882 }
883 TALLOC_FREE(db_path);
884
885 regdb_refcount = 1;
886 DEBUG(10, ("regdb_open: registry db opened. refcount reset (%d)\n",
887 regdb_refcount));
888
889 return WERR_OK;
890 }
891
892 /***********************************************************************
893 ***********************************************************************/
894
895 int regdb_close( void )
896 {
897 if (regdb_refcount == 0) {
898 return 0;
899 }
900
901 regdb_refcount--;
902
903 DEBUG(10, ("regdb_close: decrementing refcount (%d->%d)\n",
904 regdb_refcount+1, regdb_refcount));
905
906 if ( regdb_refcount > 0 )
907 return 0;
908
909 SMB_ASSERT( regdb_refcount >= 0 );
910
911 TALLOC_FREE(regdb);
912 return 0;
913 }
914
915 WERROR regdb_transaction_start(void)
916 {
917 return (dbwrap_transaction_start(regdb) == 0) ?
918 WERR_OK : WERR_REGISTRY_IO_FAILED;
919 }
920
921 WERROR regdb_transaction_commit(void)
922 {
923 return (dbwrap_transaction_commit(regdb) == 0) ?
924 WERR_OK : WERR_REGISTRY_IO_FAILED;
925 }
926
927 WERROR regdb_transaction_cancel(void)
928 {
929 return (dbwrap_transaction_cancel(regdb) == 0) ?
930 WERR_OK : WERR_REGISTRY_IO_FAILED;
931 }
932
933 /***********************************************************************
934 return the tdb sequence number of the registry tdb.
935 this is an indicator for the content of the registry
936 having changed. it will change upon regdb_init, too, though.
937 ***********************************************************************/
938 int regdb_get_seqnum(void)
939 {
940 return dbwrap_get_seqnum(regdb);
941 }
942
943
944 static WERROR regdb_delete_key_with_prefix(struct db_context *db,
945 const char *keyname,
946 const char *prefix)
947 {
948 char *path;
949 WERROR werr = WERR_NOT_ENOUGH_MEMORY;
950 TALLOC_CTX *mem_ctx = talloc_stackframe();
951
952 if (keyname == NULL) {
953 werr = WERR_INVALID_PARAMETER;
954 goto done;
955 }
956
957 if (prefix == NULL) {
958 path = discard_const_p(char, keyname);
959 } else {
960 path = talloc_asprintf(mem_ctx, "%s\\%s", prefix, keyname);
961 if (path == NULL) {
962 goto done;
963 }
964 }
965
966 path = normalize_reg_path(mem_ctx, path);
967 if (path == NULL) {
968 goto done;
969 }
970
971 werr = ntstatus_to_werror(dbwrap_purge_bystring(db, path));
972
973 done:
974 talloc_free(mem_ctx);
975 return werr;
976 }
977
978
979 static WERROR regdb_delete_values(struct db_context *db, const char *keyname)
980 {
981 return regdb_delete_key_with_prefix(db, keyname, REG_VALUE_PREFIX);
982 }
983
984 static WERROR regdb_delete_secdesc(struct db_context *db, const char *keyname)
985 {
986 return regdb_delete_key_with_prefix(db, keyname, REG_SECDESC_PREFIX);
987 }
988
989 static WERROR regdb_delete_subkeylist(struct db_context *db, const char *keyname)
990 {
991 return regdb_delete_key_with_prefix(db, keyname, NULL);
992 }
993
994
995 static WERROR regdb_delete_key_lists(struct db_context *db, const char *keyname)
996 {
997 WERROR werr;
998
999 werr = regdb_delete_values(db, keyname);
1000 if (!W_ERROR_IS_OK(werr)) {
1001 DEBUG(1, (__location__ " Deleting %s\\%s failed: %s\n",
1002 REG_VALUE_PREFIX, keyname, win_errstr(werr)));
1003 goto done;
1004 }
1005
1006 werr = regdb_delete_secdesc(db, keyname);
1007 if (!W_ERROR_IS_OK(werr)) {
1008 DEBUG(1, (__location__ " Deleting %s\\%s failed: %s\n",
1009 REG_SECDESC_PREFIX, keyname, win_errstr(werr)));
1010 goto done;
1011 }
1012
1013 werr = regdb_delete_subkeylist(db, keyname);
1014 if (!W_ERROR_IS_OK(werr)) {
1015 DEBUG(1, (__location__ " Deleting %s failed: %s\n",
1016 keyname, win_errstr(werr)));
1017 goto done;
1018 }
1019
1020 done:
1021 return werr;
1022 }
1023
1024 /***********************************************************************
1025 Add subkey strings to the registry tdb under a defined key
1026 fmt is the same format as tdb_pack except this function only supports
1027 fstrings
1028 ***********************************************************************/
1029
1030 static WERROR regdb_store_keys_internal2(struct db_context *db,
1031 const char *key,
1032 struct regsubkey_ctr *ctr)
1033 {
1034 TDB_DATA dbuf;
1035 uint8_t *buffer = NULL;
1036 int i = 0;
1037 uint32_t len, buflen;
1038 uint32_t num_subkeys = regsubkey_ctr_numkeys(ctr);
1039 char *keyname = NULL;
1040 TALLOC_CTX *ctx = talloc_stackframe();
1041 WERROR werr;
1042
1043 if (!key) {
1044 werr = WERR_INVALID_PARAMETER;
1045 goto done;
1046 }
1047
1048 keyname = talloc_strdup(ctx, key);
1049 if (!keyname) {
1050 werr = WERR_NOT_ENOUGH_MEMORY;
1051 goto done;
1052 }
1053
1054 keyname = normalize_reg_path(ctx, keyname);
1055 if (!keyname) {
1056 werr = WERR_NOT_ENOUGH_MEMORY;
1057 goto done;
1058 }
1059
1060 /* allocate some initial memory */
1061
1062 buffer = (uint8_t *)SMB_MALLOC(1024);
1063 if (buffer == NULL) {
1064 werr = WERR_NOT_ENOUGH_MEMORY;
1065 goto done;
1066 }
1067 buflen = 1024;
1068 len = 0;
1069
1070 /* store the number of subkeys */
1071
1072 len += tdb_pack(buffer+len, buflen-len, "d", num_subkeys);
1073
1074 /* pack all the strings */
1075
1076 for (i=0; i<num_subkeys; i++) {
1077 size_t thistime;
1078
1079 thistime = tdb_pack(buffer+len, buflen-len, "f",
1080 regsubkey_ctr_specific_key(ctr, i));
1081 if (len+thistime > buflen) {
1082 size_t thistime2;
1083 /*
1084 * tdb_pack hasn't done anything because of the short
1085 * buffer, allocate extra space.
1086 */
1087 buffer = SMB_REALLOC_ARRAY(buffer, uint8_t,
1088 (len+thistime)*2);
1089 if(buffer == NULL) {
1090 DEBUG(0, ("regdb_store_keys: Failed to realloc "
1091 "memory of size [%u]\n",
1092 (unsigned int)(len+thistime)*2));
1093 werr = WERR_NOT_ENOUGH_MEMORY;
1094 goto done;
1095 }
1096 buflen = (len+thistime)*2;
1097 thistime2 = tdb_pack(
1098 buffer+len, buflen-len, "f",
1099 regsubkey_ctr_specific_key(ctr, i));
1100 if (thistime2 != thistime) {
1101 DEBUG(0, ("tdb_pack failed\n"));
1102 werr = WERR_CAN_NOT_COMPLETE;
1103 goto done;
1104 }
1105 }
1106 len += thistime;
1107 }
1108
1109 /* finally write out the data */
1110
1111 dbuf.dptr = buffer;
1112 dbuf.dsize = len;
1113 werr = ntstatus_to_werror(dbwrap_store_bystring(db, keyname, dbuf,
1114 TDB_REPLACE));
1115
1116 done:
1117 TALLOC_FREE(ctx);
1118 SAFE_FREE(buffer);
1119 return werr;
1120 }
1121
1122 /**
1123 * Utility function to store a new empty list of
1124 * subkeys of given key specified as parent and subkey name
1125 * (thereby creating the key).
1126 * If the parent keyname is NULL, then the "subkey" is
1127 * interpreted as a base key.
1128 * If the subkey list does already exist, it is not modified.
1129 *
1130 * Must be called from within a transaction.
1131 */
1132 static WERROR regdb_store_subkey_list(struct db_context *db, const char *parent,
1133 const char *key)
1134 {
1135 WERROR werr;
1136 char *path = NULL;
1137 struct regsubkey_ctr *subkeys = NULL;
1138 TALLOC_CTX *frame = talloc_stackframe();
1139
1140 if (parent == NULL) {
1141 path = talloc_strdup(frame, key);
1142 } else {
1143 path = talloc_asprintf(frame, "%s\\%s", parent, key);
1144 }
1145 if (!path) {
1146 werr = WERR_NOT_ENOUGH_MEMORY;
1147 goto done;
1148 }
1149
1150 werr = regsubkey_ctr_init(frame, &subkeys);
1151 W_ERROR_NOT_OK_GOTO_DONE(werr);
1152
1153 werr = regdb_fetch_keys_internal(db, path, subkeys);
1154 if (W_ERROR_IS_OK(werr)) {
1155 /* subkey list exists already - don't modify */
1156 goto done;
1157 }
1158
1159 werr = regsubkey_ctr_reinit(subkeys);
1160 W_ERROR_NOT_OK_GOTO_DONE(werr);
1161
1162 /* create a record with 0 subkeys */
1163 werr = regdb_store_keys_internal2(db, path, subkeys);
1164 if (!W_ERROR_IS_OK(werr)) {
1165 DEBUG(0, ("regdb_store_keys: Failed to store new record for "
1166 "key [%s]: %s\n", path, win_errstr(werr)));
1167 goto done;
1168 }
1169
1170 done:
1171 talloc_free(frame);
1172 return werr;
1173 }
1174
1175 /***********************************************************************
1176 Store the new subkey record and create any child key records that
1177 do not currently exist
1178 ***********************************************************************/
1179
1180 struct regdb_store_keys_context {
1181 const char *key;
1182 struct regsubkey_ctr *ctr;
1183 };
1184
1185 static NTSTATUS regdb_store_keys_action(struct db_context *db,
1186 void *private_data)
1187 {
1188 struct regdb_store_keys_context *store_ctx;
1189 WERROR werr;
1190 int num_subkeys, i;
1191 char *path = NULL;
1192 struct regsubkey_ctr *old_subkeys = NULL;
1193 char *oldkeyname = NULL;
1194 TALLOC_CTX *mem_ctx = talloc_stackframe();
1195
1196 store_ctx = (struct regdb_store_keys_context *)private_data;
1197
1198 /*
1199 * Re-fetch the old keys inside the transaction
1200 */
1201
1202 werr = regsubkey_ctr_init(mem_ctx, &old_subkeys);
1203 W_ERROR_NOT_OK_GOTO_DONE(werr);
1204
1205 werr = regdb_fetch_keys_internal(db, store_ctx->key, old_subkeys);
1206 if (!W_ERROR_IS_OK(werr) &&
1207 !W_ERROR_EQUAL(werr, WERR_NOT_FOUND))
1208 {
1209 goto done;
1210 }
1211
1212 /*
1213 * Make the store operation as safe as possible without transactions:
1214 *
1215 * (1) For each subkey removed from ctr compared with old_subkeys:
1216 *
1217 * (a) First delete the value db entry.
1218 *
1219 * (b) Next delete the secdesc db record.
1220 *
1221 * (c) Then delete the subkey list entry.
1222 *
1223 * (2) Now write the list of subkeys of the parent key,
1224 * deleting removed entries and adding new ones.
1225 *
1226 * (3) Finally create the subkey list entries for the added keys.
1227 *
1228 * This way if we crash half-way in between deleting the subkeys
1229 * and storing the parent's list of subkeys, no old data can pop up
1230 * out of the blue when re-adding keys later on.
1231 */
1232
1233 /* (1) delete removed keys' lists (values/secdesc/subkeys) */
1234
1235 num_subkeys = regsubkey_ctr_numkeys(old_subkeys);
1236 for (i=0; i<num_subkeys; i++) {
1237 oldkeyname = regsubkey_ctr_specific_key(old_subkeys, i);
1238
1239 if (regsubkey_ctr_key_exists(store_ctx->ctr, oldkeyname)) {
1240 /*
1241 * It's still around, don't delete
1242 */
1243 continue;
1244 }
1245
1246 path = talloc_asprintf(mem_ctx, "%s\\%s", store_ctx->key,
1247 oldkeyname);
1248 if (!path) {
1249 werr = WERR_NOT_ENOUGH_MEMORY;
1250 goto done;
1251 }
1252
1253 werr = regdb_delete_key_lists(db, path);
1254 W_ERROR_NOT_OK_GOTO_DONE(werr);
1255
1256 TALLOC_FREE(path);
1257 }
1258
1259 TALLOC_FREE(old_subkeys);
1260
1261 /* (2) store the subkey list for the parent */
1262
1263 werr = regdb_store_keys_internal2(db, store_ctx->key, store_ctx->ctr);
1264 if (!W_ERROR_IS_OK(werr)) {
1265 DEBUG(0,("regdb_store_keys: Failed to store new subkey list "
1266 "for parent [%s]: %s\n", store_ctx->key,
1267 win_errstr(werr)));
1268 goto done;
1269 }
1270
1271 /* (3) now create records for any subkeys that don't already exist */
1272
1273 num_subkeys = regsubkey_ctr_numkeys(store_ctx->ctr);
1274
1275 for (i=0; i<num_subkeys; i++) {
1276 const char *subkey;
1277
1278 subkey = regsubkey_ctr_specific_key(store_ctx->ctr, i);
1279
1280 werr = regdb_store_subkey_list(db, store_ctx->key, subkey);
1281 W_ERROR_NOT_OK_GOTO_DONE(werr);
1282 }
1283
1284 /*
1285 * Update the seqnum in the container to possibly
1286 * prevent next read from going to disk
1287 */
1288 werr = regsubkey_ctr_set_seqnum(store_ctx->ctr, dbwrap_get_seqnum(db));
1289
1290 done:
1291 talloc_free(mem_ctx);
1292 return werror_to_ntstatus(werr);
1293 }
1294
1295 static bool regdb_store_keys_internal(struct db_context *db, const char *key,
1296 struct regsubkey_ctr *ctr)
1297 {
1298 int num_subkeys, old_num_subkeys, i;
1299 struct regsubkey_ctr *old_subkeys = NULL;
1300 TALLOC_CTX *ctx = talloc_stackframe();
1301 WERROR werr;
1302 bool ret = false;
1303 struct regdb_store_keys_context store_ctx;
1304
1305 if (!regdb_key_exists(db, key)) {
1306 goto done;
1307 }
1308
1309 /*
1310 * fetch a list of the old subkeys so we can determine if anything has
1311 * changed
1312 */
1313
1314 werr = regsubkey_ctr_init(ctx, &old_subkeys);
1315 if (!W_ERROR_IS_OK(werr)) {
1316 DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
1317 goto done;
1318 }
1319
1320 werr = regdb_fetch_keys_internal(db, key, old_subkeys);
1321 if (!W_ERROR_IS_OK(werr) &&
1322 !W_ERROR_EQUAL(werr, WERR_NOT_FOUND))
1323 {
1324 goto done;
1325 }
1326
1327 num_subkeys = regsubkey_ctr_numkeys(ctr);
1328 old_num_subkeys = regsubkey_ctr_numkeys(old_subkeys);
1329 if ((num_subkeys && old_num_subkeys) &&
1330 (num_subkeys == old_num_subkeys)) {
1331
1332 for (i = 0; i < num_subkeys; i++) {
1333 if (strcmp(regsubkey_ctr_specific_key(ctr, i),
1334 regsubkey_ctr_specific_key(old_subkeys, i))
1335 != 0)
1336 {
1337 break;
1338 }
1339 }
1340 if (i == num_subkeys) {
1341 /*
1342 * Nothing changed, no point to even start a tdb
1343 * transaction
1344 */
1345
1346 ret = true;
1347 goto done;
1348 }
1349 }
1350
1351 TALLOC_FREE(old_subkeys);
1352
1353 store_ctx.key = key;
1354 store_ctx.ctr = ctr;
1355
1356 werr = regdb_trans_do(db,
1357 regdb_store_keys_action,
1358 &store_ctx);
1359
1360 ret = W_ERROR_IS_OK(werr);
1361
1362 done:
1363 TALLOC_FREE(ctx);
1364
1365 return ret;
1366 }
1367
1368 static bool regdb_store_keys(const char *key, struct regsubkey_ctr *ctr)
1369 {
1370 return regdb_store_keys_internal(regdb, key, ctr);
1371 }
1372
1373 /**
1374 * create a subkey of a given key
1375 */
1376
1377 struct regdb_create_subkey_context {
1378 const char *key;
1379 const char *subkey;
1380 };
1381
1382 static NTSTATUS regdb_create_subkey_action(struct db_context *db,
1383 void *private_data)
1384 {
1385 WERROR werr;
1386 struct regdb_create_subkey_context *create_ctx;
1387 struct regsubkey_ctr *subkeys;
1388 TALLOC_CTX *mem_ctx = talloc_stackframe();
1389
1390 create_ctx = (struct regdb_create_subkey_context *)private_data;
1391
1392 werr = regsubkey_ctr_init(mem_ctx, &subkeys);
1393 W_ERROR_NOT_OK_GOTO_DONE(werr);
1394
1395 werr = regdb_fetch_keys_internal(db, create_ctx->key, subkeys);
1396 W_ERROR_NOT_OK_GOTO_DONE(werr);
1397
1398 werr = regsubkey_ctr_addkey(subkeys, create_ctx->subkey);
1399 W_ERROR_NOT_OK_GOTO_DONE(werr);
1400
1401 werr = regdb_store_keys_internal2(db, create_ctx->key, subkeys);
1402 if (!W_ERROR_IS_OK(werr)) {
1403 DEBUG(0, (__location__ " failed to store new subkey list for "
1404 "parent key %s: %s\n", create_ctx->key,
1405 win_errstr(werr)));
1406 }
1407
1408 werr = regdb_store_subkey_list(db, create_ctx->key, create_ctx->subkey);
1409
1410 done:
1411 talloc_free(mem_ctx);
1412 return werror_to_ntstatus(werr);
1413 }
1414
1415 static WERROR regdb_create_subkey_internal(struct db_context *db,
1416 const char *key,
1417 const char *subkey)
1418 {
1419 WERROR werr;
1420 struct regsubkey_ctr *subkeys;
1421 TALLOC_CTX *mem_ctx = talloc_stackframe();
1422 struct regdb_create_subkey_context create_ctx;
1423
1424 if (!regdb_key_exists(db, key)) {
1425 werr = WERR_NOT_FOUND;
1426 goto done;
1427 }
1428
1429 werr = regsubkey_ctr_init(mem_ctx, &subkeys);
1430 W_ERROR_NOT_OK_GOTO_DONE(werr);
1431
1432 werr = regdb_fetch_keys_internal(db, key, subkeys);
1433 W_ERROR_NOT_OK_GOTO_DONE(werr);
1434
1435 if (regsubkey_ctr_key_exists(subkeys, subkey)) {
1436 char *newkey;
1437
1438 newkey = talloc_asprintf(mem_ctx, "%s\\%s", key, subkey);
1439 if (newkey == NULL) {
1440 werr = WERR_NOT_ENOUGH_MEMORY;
1441 goto done;
1442 }
1443
1444 if (regdb_key_exists(db, newkey)) {
1445 werr = WERR_OK;
1446 goto done;
1447 }
1448 }
1449
1450 talloc_free(subkeys);
1451
1452 create_ctx.key = key;
1453 create_ctx.subkey = subkey;
1454
1455 werr = regdb_trans_do(db,
1456 regdb_create_subkey_action,
1457 &create_ctx);
1458
1459 done:
1460 talloc_free(mem_ctx);
1461 return werr;
1462 }
1463
1464 static WERROR regdb_create_subkey(const char *key, const char *subkey)
1465 {
1466 return regdb_create_subkey_internal(regdb, key, subkey);
1467 }
1468
1469 /**
1470 * create a base key
1471 */
1472
1473 struct regdb_create_basekey_context {
1474 const char *key;
1475 };
1476
1477 static NTSTATUS regdb_create_basekey_action(struct db_context *db,
1478 void *private_data)
1479 {
1480 WERROR werr;
1481 struct regdb_create_basekey_context *create_ctx;
1482
1483 create_ctx = (struct regdb_create_basekey_context *)private_data;
1484
1485 werr = regdb_store_subkey_list(db, NULL, create_ctx->key);
1486
1487 return werror_to_ntstatus(werr);
1488 }
1489
1490 static WERROR regdb_create_basekey(struct db_context *db, const char *key)
1491 {
1492 WERROR werr;
1493 struct regdb_create_subkey_context create_ctx;
1494
1495 create_ctx.key = key;
1496
1497 werr = regdb_trans_do(db,
1498 regdb_create_basekey_action,
1499 &create_ctx);
1500
1501 return werr;
1502 }
1503
1504 /**
1505 * create a subkey of a given key
1506 */
1507
1508 struct regdb_delete_subkey_context {
1509 const char *key;
1510 const char *subkey;
1511 const char *path;
1512 bool lazy;
1513 };
1514
1515 static NTSTATUS regdb_delete_subkey_action(struct db_context *db,
1516 void *private_data)
1517 {
1518 WERROR werr;
1519 struct regdb_delete_subkey_context *delete_ctx;
1520 struct regsubkey_ctr *subkeys;
1521 TALLOC_CTX *mem_ctx = talloc_stackframe();
1522
1523 delete_ctx = (struct regdb_delete_subkey_context *)private_data;
1524
1525 werr = regdb_delete_key_lists(db, delete_ctx->path);
1526 W_ERROR_NOT_OK_GOTO_DONE(werr);
1527
1528 if (delete_ctx->lazy) {
1529 goto done;
1530 }
1531
1532 werr = regsubkey_ctr_init(mem_ctx, &subkeys);
1533 W_ERROR_NOT_OK_GOTO_DONE(werr);
1534
1535 werr = regdb_fetch_keys_internal(db, delete_ctx->key, subkeys);
1536 W_ERROR_NOT_OK_GOTO_DONE(werr);
1537
1538 werr = regsubkey_ctr_delkey(subkeys, delete_ctx->subkey);
1539 W_ERROR_NOT_OK_GOTO_DONE(werr);
1540
1541 werr = regdb_store_keys_internal2(db, delete_ctx->key, subkeys);
1542 if (!W_ERROR_IS_OK(werr)) {
1543 DEBUG(0, (__location__ " failed to store new subkey_list for "
1544 "parent key %s: %s\n", delete_ctx->key,
1545 win_errstr(werr)));
1546 }
1547
1548 done:
1549 talloc_free(mem_ctx);
1550 return werror_to_ntstatus(werr);
1551 }
1552
1553 static WERROR regdb_delete_subkey(const char *key, const char *subkey, bool lazy)
1554 {
1555 WERROR werr;
1556 char *path;
1557 struct regdb_delete_subkey_context delete_ctx;
1558 TALLOC_CTX *mem_ctx = talloc_stackframe();
1559
1560 if (!regdb_key_exists(regdb, key)) {
1561 werr = WERR_NOT_FOUND;
1562 goto done;
1563 }
1564
1565 path = talloc_asprintf(mem_ctx, "%s\\%s", key, subkey);
1566 if (path == NULL) {
1567 werr = WERR_NOT_ENOUGH_MEMORY;
1568 goto done;
1569 }
1570
1571 if (!regdb_key_exists(regdb, path)) {
1572 werr = WERR_OK;
1573 goto done;
1574 }
1575
1576 delete_ctx.key = key;
1577 delete_ctx.subkey = subkey;
1578 delete_ctx.path = path;
1579 delete_ctx.lazy = lazy;
1580
1581 werr = regdb_trans_do(regdb,
1582 regdb_delete_subkey_action,
1583 &delete_ctx);
1584
1585 done:
1586 talloc_free(mem_ctx);
1587 return werr;
1588 }
1589
1590 static TDB_DATA regdb_fetch_key_internal(struct db_context *db,
1591 TALLOC_CTX *mem_ctx, const char *key)
1592 {
1593 char *path = NULL;
1594 TDB_DATA data;
1595 NTSTATUS status;
1596
1597 path = normalize_reg_path(mem_ctx, key);
1598 if (!path) {
1599 return make_tdb_data(NULL, 0);
1600 }
1601
1602 status = dbwrap_fetch_bystring(db, mem_ctx, path, &data);
1603 if (!NT_STATUS_IS_OK(status)) {
1604 data = tdb_null;
1605 }
1606
1607 TALLOC_FREE(path);
1608 return data;
1609 }
1610
1611
1612 /**
1613 * Check for the existence of a key.
1614 *
1615 * Existence of a key is authoritatively defined by
1616 * the existence of the record that contains the list
1617 * of its subkeys.
1618 *
1619 * Return false, if the record does not match the correct
1620 * structure of an initial 4-byte counter and then a
1621 * list of the corresponding number of zero-terminated
1622 * strings.
1623 */
1624 static bool regdb_key_exists(struct db_context *db, const char *key)
1625 {
1626 TALLOC_CTX *mem_ctx = talloc_stackframe();
1627 TDB_DATA value;
1628 bool ret = false;
1629 char *path;
1630 uint32_t buflen;
1631 const char *buf;
1632 uint32_t num_items, i;
1633 int32_t len;
1634
1635 if (key == NULL) {
1636 goto done;
1637 }
1638
1639 path = normalize_reg_path(mem_ctx, key);
1640 if (path == NULL) {
1641 DEBUG(0, ("out of memory! (talloc failed)\n"));
1642 goto done;
1643 }
1644
1645 if (*path == '\0') {
1646 goto done;
1647 }
1648
1649 value = regdb_fetch_key_internal(db, mem_ctx, path);
1650 if (value.dptr == NULL) {
1651 goto done;
1652 }
1653
1654 if (value.dsize == 0) {
1655 DEBUG(10, ("regdb_key_exists: subkeylist-record for key "
1656 "[%s] is empty: Could be a deleted record in a "
1657 "clustered (ctdb) environment?\n",
1658 path));
1659 goto done;
1660 }
1661
1662 len = tdb_unpack(value.dptr, value.dsize, "d", &num_items);
1663 if (len == (int32_t)-1) {
1664 DEBUG(1, ("regdb_key_exists: ERROR: subkeylist-record for key "
1665 "[%s] is invalid: Could not parse initial 4-byte "
1666 "counter. record data length is %u.\n",
1667 path, (unsigned int)value.dsize));
1668 goto done;
1669 }
1670
1671 /*
1672 * Note: the tdb_unpack check above implies that len <= value.dsize
1673 */
1674 buflen = value.dsize - len;
1675 buf = (const char *)value.dptr + len;
1676
1677 len = 0;
1678
1679 for (i = 0; i < num_items; i++) {
1680 if (buflen == 0) {
1681 break;
1682 }
1683 len = strnlen(buf, buflen) + 1;
1684 if (buflen < len) {
1685 DEBUG(1, ("regdb_key_exists: ERROR: subkeylist-record "
1686 "for key [%s] is corrupt: %u items expected, "
1687 "item number %u is not zero terminated.\n",
1688 path, num_items, i+1));
1689 goto done;
1690 }
1691
1692 buf += len;
1693 buflen -= len;
1694 }
1695
1696 if (buflen > 0) {
1697 DEBUG(1, ("regdb_key_exists: ERROR: subkeylist-record for key "
1698 "[%s] is corrupt: %u items expected and found, but "
1699 "the record contains additional %u bytes\n",
1700 path, num_items, buflen));
1701 goto done;
1702 }
1703
1704 if (i < num_items) {
1705 DEBUG(1, ("regdb_key_exists: ERROR: subkeylist-record for key "
1706 "[%s] is corrupt: %u items expected, but only %u "
1707 "items found.\n",
1708 path, num_items, i+1));
1709 goto done;
1710 }
1711
1712 ret = true;
1713
1714 done:
1715 TALLOC_FREE(mem_ctx);
1716 return ret;
1717 }
1718
1719
1720 /***********************************************************************
1721 Retrieve an array of strings containing subkeys. Memory should be
1722 released by the caller.
1723 ***********************************************************************/
1724
1725 static WERROR regdb_fetch_keys_internal(struct db_context *db, const char *key,
1726 struct regsubkey_ctr *ctr)
1727 {
1728 WERROR werr;
1729 uint32_t num_items;
1730 uint8_t *buf;
1731 uint32_t buflen, len;
1732 int i;
1733 fstring subkeyname;
1734 TALLOC_CTX *frame = talloc_stackframe();
1735 TDB_DATA value;
1736 int seqnum[2], count;
1737
1738 DEBUG(11,("regdb_fetch_keys: Enter key => [%s]\n", key ? key : "NULL"));
1739
1740 if (!regdb_key_exists(db, key)) {
1741 DEBUG(10, ("key [%s] not found\n", key));
1742 werr = WERR_NOT_FOUND;
1743 goto done;
1744 }
1745
1746 werr = regsubkey_ctr_reinit(ctr);
1747 W_ERROR_NOT_OK_GOTO_DONE(werr);
1748
1749 count = 0;
1750 ZERO_STRUCT(value);
1751 seqnum[0] = dbwrap_get_seqnum(db);
1752
1753 do {
1754 count++;
1755 TALLOC_FREE(value.dptr);
1756 value = regdb_fetch_key_internal(db, frame, key);
1757 seqnum[count % 2] = dbwrap_get_seqnum(db);
1758
1759 } while (seqnum[0] != seqnum[1]);
1760
1761 if (count > 1) {
1762 DEBUG(5, ("regdb_fetch_keys_internal: it took %d attempts to "
1763 "fetch key '%s' with constant seqnum\n",
1764 count, key));
1765 }
1766
1767 werr = regsubkey_ctr_set_seqnum(ctr, seqnum[0]);
1768 if (!W_ERROR_IS_OK(werr)) {
1769 goto done;
1770 }
1771
1772 if (value.dsize == 0 || value.dptr == NULL) {
1773 DEBUG(10, ("regdb_fetch_keys: no subkeys found for key [%s]\n",
1774 key));
1775 goto done;
1776 }
1777
1778 buf = value.dptr;
1779 buflen = value.dsize;
1780 len = tdb_unpack( buf, buflen, "d", &num_items);
1781 if (len == (uint32_t)-1) {
1782 werr = WERR_NOT_FOUND;
1783 goto done;
1784 }
1785
1786 for (i=0; i<num_items; i++) {
1787 len += tdb_unpack(buf+len, buflen-len, "f", subkeyname);
1788 werr = regsubkey_ctr_addkey(ctr, subkeyname);
1789 if (!W_ERROR_IS_OK(werr)) {
1790 DEBUG(5, ("regdb_fetch_keys: regsubkey_ctr_addkey "
1791 "failed: %s\n", win_errstr(werr)));
1792 num_items = 0;
1793 goto done;
1794 }
1795 }
1796
1797 DEBUG(11,("regdb_fetch_keys: Exit [%d] items\n", num_items));
1798
1799 done:
1800 TALLOC_FREE(frame);
1801 return werr;
1802 }
1803
1804 static int regdb_fetch_keys(const char *key, struct regsubkey_ctr *ctr)
1805 {
1806 WERROR werr;
1807
1808 werr = regdb_fetch_keys_internal(regdb, key, ctr);
1809 if (!W_ERROR_IS_OK(werr)) {
1810 return -1;
1811 }
1812
1813 return regsubkey_ctr_numkeys(ctr);
1814 }
1815
1816 /****************************************************************************
1817 Unpack a list of registry values frem the TDB
1818 ***************************************************************************/
1819
1820 static int regdb_unpack_values(struct regval_ctr *values, uint8_t *buf, int buflen)
1821 {
1822 int len = 0;
1823 uint32_t type;
1824 fstring valuename;
1825 uint32_t size;
1826 uint8_t *data_p;
1827 uint32_t num_values = 0;
1828 int i;
1829
1830 /* loop and unpack the rest of the registry values */
1831
1832 len += tdb_unpack(buf+len, buflen-len, "d", &num_values);
1833
1834 for ( i=0; i<num_values; i++ ) {
1835 /* unpack the next regval */
1836
1837 type = REG_NONE;
1838 size = 0;
1839 data_p = NULL;
1840 valuename[0] = '\0';
1841 len += tdb_unpack(buf+len, buflen-len, "fdB",
1842 valuename,
1843 &type,
1844 &size,
1845 &data_p);
1846
1847 regval_ctr_addvalue(values, valuename, type,
1848 (uint8_t *)data_p, size);
1849 SAFE_FREE(data_p); /* 'B' option to tdb_unpack does a malloc() */
1850
1851 DEBUG(10, ("regdb_unpack_values: value[%d]: name[%s] len[%d]\n",
1852 i, valuename, size));
1853 }
1854
1855 return len;
1856 }
1857
1858 /****************************************************************************
1859 Pack all values in all printer keys
1860 ***************************************************************************/
1861
1862 static int regdb_pack_values(struct regval_ctr *values, uint8_t *buf, int buflen)
1863 {
1864 int len = 0;
1865 int i;
1866 struct regval_blob *val;
1867 int num_values;
1868
1869 if ( !values )
1870 return 0;
1871
1872 num_values = regval_ctr_numvals( values );
1873
1874 /* pack the number of values first */
1875
1876 len += tdb_pack( buf+len, buflen-len, "d", num_values );
1877
1878 /* loop over all values */
1879
1880 for ( i=0; i<num_values; i++ ) {
1881 val = regval_ctr_specific_value( values, i );
1882 len += tdb_pack(buf+len, buflen-len, "fdB",
1883 regval_name(val),
1884 regval_type(val),
1885 regval_size(val),
1886 regval_data_p(val) );
1887 }
1888
1889 return len;
1890 }
1891
1892 /***********************************************************************
1893 Retrieve an array of strings containing subkeys. Memory should be
1894 released by the caller.
1895 ***********************************************************************/
1896
1897 static int regdb_fetch_values_internal(struct db_context *db, const char* key,
1898 struct regval_ctr *values)
1899 {
1900 char *keystr = NULL;
1901 TALLOC_CTX *ctx = talloc_stackframe();
1902 int ret = 0;
1903 TDB_DATA value;
1904 WERROR werr;
1905 int seqnum[2], count;
1906
1907 DEBUG(10,("regdb_fetch_values: Looking for values of key [%s]\n", key));
1908
1909 if (!regdb_key_exists(db, key)) {
1910 DEBUG(10, ("regb_fetch_values: key [%s] does not exist\n",
1911 key));
1912 ret = -1;
1913 goto done;
1914 }
1915
1916 keystr = talloc_asprintf(ctx, "%s\\%s", REG_VALUE_PREFIX, key);
1917 if (!keystr) {
1918 goto done;
1919 }
1920
1921 ZERO_STRUCT(value);
1922 count = 0;
1923 seqnum[0] = dbwrap_get_seqnum(db);
1924
1925 do {
1926 count++;
1927 TALLOC_FREE(value.dptr);
1928 value = regdb_fetch_key_internal(db, ctx, keystr);
1929 seqnum[count % 2] = dbwrap_get_seqnum(db);
1930 } while (seqnum[0] != seqnum[1]);
1931
1932 if (count > 1) {
1933 DEBUG(5, ("regdb_fetch_values_internal: it took %d attempts "
1934 "to fetch key '%s' with constant seqnum\n",
1935 count, key));
1936 }
1937
1938 werr = regval_ctr_set_seqnum(values, seqnum[0]);
1939 if (!W_ERROR_IS_OK(werr)) {
1940 goto done;
1941 }
1942
1943 if (!value.dptr) {
1944 /* all keys have zero values by default */
1945 goto done;
1946 }
1947
1948 regdb_unpack_values(values, value.dptr, value.dsize);
1949 ret = regval_ctr_numvals(values);
1950
1951 done:
1952 TALLOC_FREE(ctx);
1953 return ret;
1954 }
1955
1956 static int regdb_fetch_values(const char* key, struct regval_ctr *values)
1957 {
1958 return regdb_fetch_values_internal(regdb, key, values);
1959 }
1960
1961 static NTSTATUS regdb_store_values_internal(struct db_context *db,
1962 const char *key,
1963 struct regval_ctr *values)
1964 {
1965 TDB_DATA old_data, data;
1966 char *keystr = NULL;
1967 TALLOC_CTX *ctx = talloc_stackframe();
1968 int len;
1969 NTSTATUS status;
1970 WERROR werr;
1971
1972 DEBUG(10,("regdb_store_values: Looking for values of key [%s]\n", key));
1973
1974 if (!regdb_key_exists(db, key)) {
1975 status = NT_STATUS_NOT_FOUND;
1976 goto done;
1977 }
1978
1979 if (regval_ctr_numvals(values) == 0) {
1980 werr = regdb_delete_values(db, key);
1981 if (!W_ERROR_IS_OK(werr)) {
1982 status = werror_to_ntstatus(werr);
1983 goto done;
1984 }
1985
1986 /*
1987 * update the seqnum in the cache to prevent the next read
1988 * from going to disk
1989 */
1990 werr = regval_ctr_set_seqnum(values, dbwrap_get_seqnum(db));
1991 status = werror_to_ntstatus(werr);
1992 goto done;
1993 }
1994
1995 ZERO_STRUCT(data);
1996
1997 len = regdb_pack_values(values, data.dptr, data.dsize);
1998 if (len <= 0) {
1999 DEBUG(0,("regdb_store_values: unable to pack values. len <= 0\n"));
2000 status = NT_STATUS_UNSUCCESSFUL;
2001 goto done;
2002 }
2003
2004 data.dptr = talloc_array(ctx, uint8_t, len);
2005 data.dsize = len;
2006
2007 len = regdb_pack_values(values, data.dptr, data.dsize);
2008
2009 SMB_ASSERT( len == data.dsize );
2010
2011 keystr = talloc_asprintf(ctx, "%s\\%s", REG_VALUE_PREFIX, key );
2012 if (!keystr) {
2013 status = NT_STATUS_NO_MEMORY;
2014 goto done;
2015 }
2016 keystr = normalize_reg_path(ctx, keystr);
2017 if (!keystr) {
2018 status = NT_STATUS_NO_MEMORY;
2019 goto done;
2020 }
2021
2022 status = dbwrap_fetch_bystring(db, ctx, keystr, &old_data);
2023
2024 if (NT_STATUS_IS_OK(status)
2025 && (old_data.dptr != NULL)
2026 && (old_data.dsize == data.dsize)
2027 && (memcmp(old_data.dptr, data.dptr, data.dsize) == 0))
2028 {
2029 status = NT_STATUS_OK;
2030 goto done;
2031 }
2032
2033 status = dbwrap_trans_store_bystring(db, keystr, data, TDB_REPLACE);
2034 if (!NT_STATUS_IS_OK(status)) {
2035 DEBUG(0, ("regdb_store_values_internal: error storing: %s\n", nt_errstr(status)));
2036 goto done;
2037 }
2038
2039 /*
2040 * update the seqnum in the cache to prevent the next read
2041 * from going to disk
2042 */
2043 werr = regval_ctr_set_seqnum(values, dbwrap_get_seqnum(db));
2044 status = werror_to_ntstatus(werr);
2045
2046 done:
2047 TALLOC_FREE(ctx);
2048 return status;
2049 }
2050
2051 struct regdb_store_values_ctx {
2052 const char *key;
2053 struct regval_ctr *values;
2054 };
2055
2056 static NTSTATUS regdb_store_values_action(struct db_context *db,
2057 void *private_data)
2058 {
2059 NTSTATUS status;
2060 struct regdb_store_values_ctx *ctx =
2061 (struct regdb_store_values_ctx *)private_data;
2062
2063 status = regdb_store_values_internal(db, ctx->key, ctx->values);
2064
2065 return status;
2066 }
2067
2068 static bool regdb_store_values(const char *key, struct regval_ctr *values)
2069 {
2070 WERROR werr;
2071 struct regdb_store_values_ctx ctx;
2072
2073 ctx.key = key;
2074 ctx.values = values;
2075
2076 werr = regdb_trans_do(regdb, regdb_store_values_action, &ctx);
2077
2078 return W_ERROR_IS_OK(werr);
2079 }
2080
2081 static WERROR regdb_get_secdesc(TALLOC_CTX *mem_ctx, const char *key,
2082 struct security_descriptor **psecdesc)
2083 {
2084 char *tdbkey;
2085 TDB_DATA data;
2086 NTSTATUS status;
2087 TALLOC_CTX *tmp_ctx = talloc_stackframe();
2088 WERROR err = WERR_OK;
2089
2090 DEBUG(10, ("regdb_get_secdesc: Getting secdesc of key [%s]\n", key));
2091
2092 if (!regdb_key_exists(regdb, key)) {
2093 err = WERR_FILE_NOT_FOUND;
2094 goto done;
2095 }
2096
2097 tdbkey = talloc_asprintf(tmp_ctx, "%s\\%s", REG_SECDESC_PREFIX, key);
2098 if (tdbkey == NULL) {
2099 err = WERR_NOT_ENOUGH_MEMORY;
2100 goto done;
2101 }
2102
2103 tdbkey = normalize_reg_path(tmp_ctx, tdbkey);
2104 if (tdbkey == NULL) {
2105 err = WERR_NOT_ENOUGH_MEMORY;
2106 goto done;
2107 }
2108
2109 status = dbwrap_fetch_bystring(regdb, tmp_ctx, tdbkey, &data);
2110 if (!NT_STATUS_IS_OK(status)) {
2111 err = WERR_FILE_NOT_FOUND;
2112 goto done;
2113 }
2114
2115 status = unmarshall_sec_desc(mem_ctx, (uint8_t *)data.dptr, data.dsize,
2116 psecdesc);
2117
2118 if (NT_STATUS_EQUAL(status, NT_STATUS_NO_MEMORY)) {
2119 err = WERR_NOT_ENOUGH_MEMORY;
2120 } else if (!NT_STATUS_IS_OK(status)) {
2121 err = WERR_REGISTRY_CORRUPT;
2122 }
2123
2124 done:
2125 TALLOC_FREE(tmp_ctx);
2126 return err;
2127 }
2128
2129 struct regdb_set_secdesc_ctx {
2130 const char *key;
2131 struct security_descriptor *secdesc;
2132 };
2133
2134 static NTSTATUS regdb_set_secdesc_action(struct db_context *db,
2135 void *private_data)
2136 {
2137 char *tdbkey;
2138 NTSTATUS status;
2139 TDB_DATA tdbdata;
2140 struct regdb_set_secdesc_ctx *ctx =
2141 (struct regdb_set_secdesc_ctx *)private_data;
2142 TALLOC_CTX *frame = talloc_stackframe();
2143
2144 tdbkey = talloc_asprintf(frame, "%s\\%s", REG_SECDESC_PREFIX, ctx->key);
2145 if (tdbkey == NULL) {
2146 status = NT_STATUS_NO_MEMORY;
2147 goto done;
2148 }
2149
2150 tdbkey = normalize_reg_path(frame, tdbkey);
2151 if (tdbkey == NULL) {
2152 status = NT_STATUS_NO_MEMORY;
2153 goto done;
2154 }
2155
2156 if (ctx->secdesc == NULL) {
2157 /* assuming a delete */
2158 status = dbwrap_delete_bystring(db, tdbkey);
2159 goto done;
2160 }
2161
2162 status = marshall_sec_desc(frame, ctx->secdesc, &tdbdata.dptr,
2163 &tdbdata.dsize);
2164 if (!NT_STATUS_IS_OK(status)) {
2165 goto done;
2166 }
2167
2168 status = dbwrap_store_bystring(db, tdbkey, tdbdata, 0);
2169
2170 done:
2171 TALLOC_FREE(frame);
2172 return status;
2173 }
2174
2175 static WERROR regdb_set_secdesc(const char *key,
2176 struct security_descriptor *secdesc)
2177 {
2178 WERROR err;
2179 struct regdb_set_secdesc_ctx ctx;
2180
2181 if (!regdb_key_exists(regdb, key)) {
2182 err = WERR_FILE_NOT_FOUND;
2183 goto done;
2184 }
2185
2186 ctx.key = key;
2187 ctx.secdesc = secdesc;
2188
2189 err = regdb_trans_do(regdb, regdb_set_secdesc_action, &ctx);
2190
2191 done:
2192 return err;
2193 }
2194
2195 static bool regdb_subkeys_need_update(struct regsubkey_ctr *subkeys)
2196 {
2197 return (regdb_get_seqnum() != regsubkey_ctr_get_seqnum(subkeys));
2198 }
2199
2200 static bool regdb_values_need_update(struct regval_ctr *values)
2201 {
2202 return (regdb_get_seqnum() != regval_ctr_get_seqnum(values));
2203 }
2204
2205 /*
2206 * Table of function pointers for default access
2207 */
2208
2209 struct registry_ops regdb_ops = {
2210 .fetch_subkeys = regdb_fetch_keys,
2211 .fetch_values = regdb_fetch_values,
2212 .store_subkeys = regdb_store_keys,
2213 .store_values = regdb_store_values,
2214 .create_subkey = regdb_create_subkey,
2215 .delete_subkey = regdb_delete_subkey,
2216 .get_secdesc = regdb_get_secdesc,
2217 .set_secdesc = regdb_set_secdesc,
2218 .subkeys_need_update = regdb_subkeys_need_update,
2219 .values_need_update = regdb_values_need_update
2220 };
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