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dsdb: Include MS-ADTS doc references on deleted object contstraints
[Samba.git] / source4 / dsdb / samdb / ldb_modules / repl_meta_data.c
blobc8cdfecb93119149969915c392a55a8ffd190aed
1 /*
2 ldb database library
3
4 Copyright (C) Simo Sorce 2004-2008
5 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2013
6 Copyright (C) Andrew Tridgell 2005-2009
7 Copyright (C) Stefan Metzmacher <metze@samba.org> 2007
8 Copyright (C) Matthieu Patou <mat@samba.org> 2010-2011
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 */
23
24 /*
25 * Name: ldb
26 *
27 * Component: ldb repl_meta_data module
28 *
29 * Description: - add a unique objectGUID onto every new record,
30 * - handle whenCreated, whenChanged timestamps
31 * - handle uSNCreated, uSNChanged numbers
32 * - handle replPropertyMetaData attribute
33 *
34 * Author: Simo Sorce
35 * Author: Stefan Metzmacher
36 */
37
38 #include "includes.h"
39 #include "ldb_module.h"
40 #include "dsdb/samdb/samdb.h"
41 #include "dsdb/common/proto.h"
42 #include "../libds/common/flags.h"
43 #include "librpc/gen_ndr/ndr_misc.h"
44 #include "librpc/gen_ndr/ndr_drsuapi.h"
45 #include "librpc/gen_ndr/ndr_drsblobs.h"
46 #include "param/param.h"
47 #include "libcli/security/security.h"
48 #include "lib/util/dlinklist.h"
49 #include "dsdb/samdb/ldb_modules/util.h"
50 #include "lib/util/binsearch.h"
51 #include "lib/util/tsort.h"
52
53 /*
54 * It's 29/12/9999 at 23:59:59 UTC as specified in MS-ADTS 7.1.1.4.2
55 * Deleted Objects Container
56 */
57 static const NTTIME DELETED_OBJECT_CONTAINER_CHANGE_TIME = 2650466015990000000ULL;
58
59 struct replmd_private {
60 TALLOC_CTX *la_ctx;
61 struct la_entry *la_list;
62 TALLOC_CTX *bl_ctx;
63 struct la_backlink *la_backlinks;
64 struct nc_entry {
65 struct nc_entry *prev, *next;
66 struct ldb_dn *dn;
67 uint64_t mod_usn;
68 uint64_t mod_usn_urgent;
69 } *ncs;
70 };
71
72 struct la_entry {
73 struct la_entry *next, *prev;
74 struct drsuapi_DsReplicaLinkedAttribute *la;
75 };
76
77 struct replmd_replicated_request {
78 struct ldb_module *module;
79 struct ldb_request *req;
80
81 const struct dsdb_schema *schema;
82
83 /* the controls we pass down */
84 struct ldb_control **controls;
85
86 /* details for the mode where we apply a bunch of inbound replication meessages */
87 bool apply_mode;
88 uint32_t index_current;
89 struct dsdb_extended_replicated_objects *objs;
90
91 struct ldb_message *search_msg;
92
93 uint64_t seq_num;
94 bool is_urgent;
95
96 bool isDeleted;
97 };
98
99 static int replmd_replicated_apply_merge(struct replmd_replicated_request *ar);
100 static int replmd_delete_internals(struct ldb_module *module, struct ldb_request *req, bool re_delete);
101
102 enum urgent_situation {
103 REPL_URGENT_ON_CREATE = 1,
104 REPL_URGENT_ON_UPDATE = 2,
105 REPL_URGENT_ON_DELETE = 4
106 };
107
108 enum deletion_state {
109 OBJECT_NOT_DELETED=1,
110 OBJECT_DELETED=2,
111 OBJECT_RECYCLED=3,
112 OBJECT_TOMBSTONE=4,
113 OBJECT_REMOVED=5
114 };
115
116 static void replmd_deletion_state(struct ldb_module *module,
117 const struct ldb_message *msg,
118 enum deletion_state *current_state,
119 enum deletion_state *next_state)
120 {
121 int ret;
122 bool enabled = false;
123
124 if (msg == NULL) {
125 *current_state = OBJECT_REMOVED;
126 if (next_state != NULL) {
127 *next_state = OBJECT_REMOVED;
128 }
129 return;
130 }
131
132 ret = dsdb_recyclebin_enabled(module, &enabled);
133 if (ret != LDB_SUCCESS) {
134 enabled = false;
135 }
136
137 if (ldb_msg_check_string_attribute(msg, "isDeleted", "TRUE")) {
138 if (!enabled) {
139 *current_state = OBJECT_TOMBSTONE;
140 if (next_state != NULL) {
141 *next_state = OBJECT_REMOVED;
142 }
143 return;
144 }
145
146 if (ldb_msg_check_string_attribute(msg, "isRecycled", "TRUE")) {
147 *current_state = OBJECT_RECYCLED;
148 if (next_state != NULL) {
149 *next_state = OBJECT_REMOVED;
150 }
151 return;
152 }
153
154 *current_state = OBJECT_DELETED;
155 if (next_state != NULL) {
156 *next_state = OBJECT_RECYCLED;
157 }
158 return;
159 }
160
161 *current_state = OBJECT_NOT_DELETED;
162 if (next_state == NULL) {
163 return;
164 }
165
166 if (enabled) {
167 *next_state = OBJECT_DELETED;
168 } else {
169 *next_state = OBJECT_TOMBSTONE;
170 }
171 }
172
173 static const struct {
174 const char *update_name;
175 enum urgent_situation repl_situation;
176 } urgent_objects[] = {
177 {"nTDSDSA", (REPL_URGENT_ON_CREATE | REPL_URGENT_ON_DELETE)},
178 {"crossRef", (REPL_URGENT_ON_CREATE | REPL_URGENT_ON_DELETE)},
179 {"attributeSchema", (REPL_URGENT_ON_CREATE | REPL_URGENT_ON_UPDATE)},
180 {"classSchema", (REPL_URGENT_ON_CREATE | REPL_URGENT_ON_UPDATE)},
181 {"secret", (REPL_URGENT_ON_CREATE | REPL_URGENT_ON_UPDATE)},
182 {"rIDManager", (REPL_URGENT_ON_CREATE | REPL_URGENT_ON_UPDATE)},
183 {NULL, 0}
184 };
185
186 /* Attributes looked for when updating or deleting, to check for a urgent replication needed */
187 static const char *urgent_attrs[] = {
188 "lockoutTime",
189 "pwdLastSet",
190 "userAccountControl",
191 NULL
192 };
193
194
195 static bool replmd_check_urgent_objectclass(const struct ldb_message_element *objectclass_el,
196 enum urgent_situation situation)
197 {
198 unsigned int i, j;
199 for (i=0; urgent_objects[i].update_name; i++) {
200
201 if ((situation & urgent_objects[i].repl_situation) == 0) {
202 continue;
203 }
204
205 for (j=0; j<objectclass_el->num_values; j++) {
206 const struct ldb_val *v = &objectclass_el->values[j];
207 if (ldb_attr_cmp((const char *)v->data, urgent_objects[i].update_name) == 0) {
208 return true;
209 }
210 }
211 }
212 return false;
213 }
214
215 static bool replmd_check_urgent_attribute(const struct ldb_message_element *el)
216 {
217 if (ldb_attr_in_list(urgent_attrs, el->name)) {
218 return true;
219 }
220 return false;
221 }
222
223
224 static int replmd_replicated_apply_isDeleted(struct replmd_replicated_request *ar);
225
226 /*
227 initialise the module
228 allocate the private structure and build the list
229 of partition DNs for use by replmd_notify()
230 */
231 static int replmd_init(struct ldb_module *module)
232 {
233 struct replmd_private *replmd_private;
234 struct ldb_context *ldb = ldb_module_get_ctx(module);
235
236 replmd_private = talloc_zero(module, struct replmd_private);
237 if (replmd_private == NULL) {
238 ldb_oom(ldb);
239 return LDB_ERR_OPERATIONS_ERROR;
240 }
241 ldb_module_set_private(module, replmd_private);
242
243 return ldb_next_init(module);
244 }
245
246 /*
247 cleanup our per-transaction contexts
248 */
249 static void replmd_txn_cleanup(struct replmd_private *replmd_private)
250 {
251 talloc_free(replmd_private->la_ctx);
252 replmd_private->la_list = NULL;
253 replmd_private->la_ctx = NULL;
254
255 talloc_free(replmd_private->bl_ctx);
256 replmd_private->la_backlinks = NULL;
257 replmd_private->bl_ctx = NULL;
258 }
259
260
261 struct la_backlink {
262 struct la_backlink *next, *prev;
263 const char *attr_name;
264 struct GUID forward_guid, target_guid;
265 bool active;
266 };
267
268 /*
269 process a backlinks we accumulated during a transaction, adding and
270 deleting the backlinks from the target objects
271 */
272 static int replmd_process_backlink(struct ldb_module *module, struct la_backlink *bl, struct ldb_request *parent)
273 {
274 struct ldb_dn *target_dn, *source_dn;
275 int ret;
276 struct ldb_context *ldb = ldb_module_get_ctx(module);
277 struct ldb_message *msg;
278 TALLOC_CTX *tmp_ctx = talloc_new(bl);
279 char *dn_string;
280
281 /*
282 - find DN of target
283 - find DN of source
284 - construct ldb_message
285 - either an add or a delete
286 */
287 ret = dsdb_module_dn_by_guid(module, tmp_ctx, &bl->target_guid, &target_dn, parent);
288 if (ret != LDB_SUCCESS) {
289 DEBUG(2,(__location__ ": WARNING: Failed to find target DN for linked attribute with GUID %s\n",
290 GUID_string(bl, &bl->target_guid)));
291 return LDB_SUCCESS;
292 }
293
294 ret = dsdb_module_dn_by_guid(module, tmp_ctx, &bl->forward_guid, &source_dn, parent);
295 if (ret != LDB_SUCCESS) {
296 ldb_asprintf_errstring(ldb, "Failed to find source DN for linked attribute with GUID %s\n",
297 GUID_string(bl, &bl->forward_guid));
298 talloc_free(tmp_ctx);
299 return ret;
300 }
301
302 msg = ldb_msg_new(tmp_ctx);
303 if (msg == NULL) {
304 ldb_module_oom(module);
305 talloc_free(tmp_ctx);
306 return LDB_ERR_OPERATIONS_ERROR;
307 }
308
309 /* construct a ldb_message for adding/deleting the backlink */
310 msg->dn = target_dn;
311 dn_string = ldb_dn_get_extended_linearized(tmp_ctx, source_dn, 1);
312 if (!dn_string) {
313 ldb_module_oom(module);
314 talloc_free(tmp_ctx);
315 return LDB_ERR_OPERATIONS_ERROR;
316 }
317 ret = ldb_msg_add_steal_string(msg, bl->attr_name, dn_string);
318 if (ret != LDB_SUCCESS) {
319 talloc_free(tmp_ctx);
320 return ret;
321 }
322 msg->elements[0].flags = bl->active?LDB_FLAG_MOD_ADD:LDB_FLAG_MOD_DELETE;
323
324 /* a backlink should never be single valued. Unfortunately the
325 exchange schema has a attribute
326 msExchBridgeheadedLocalConnectorsDNBL which is single
327 valued and a backlink. We need to cope with that by
328 ignoring the single value flag */
329 msg->elements[0].flags |= LDB_FLAG_INTERNAL_DISABLE_SINGLE_VALUE_CHECK;
330
331 ret = dsdb_module_modify(module, msg, DSDB_FLAG_NEXT_MODULE, parent);
332 if (ret == LDB_ERR_NO_SUCH_ATTRIBUTE && !bl->active) {
333 /* we allow LDB_ERR_NO_SUCH_ATTRIBUTE as success to
334 cope with possible corruption where the backlink has
335 already been removed */
336 DEBUG(3,("WARNING: backlink from %s already removed from %s - %s\n",
337 ldb_dn_get_linearized(target_dn),
338 ldb_dn_get_linearized(source_dn),
339 ldb_errstring(ldb)));
340 ret = LDB_SUCCESS;
341 } else if (ret != LDB_SUCCESS) {
342 ldb_asprintf_errstring(ldb, "Failed to %s backlink from %s to %s - %s",
343 bl->active?"add":"remove",
344 ldb_dn_get_linearized(source_dn),
345 ldb_dn_get_linearized(target_dn),
346 ldb_errstring(ldb));
347 talloc_free(tmp_ctx);
348 return ret;
349 }
350 talloc_free(tmp_ctx);
351 return ret;
352 }
353
354 /*
355 add a backlink to the list of backlinks to add/delete in the prepare
356 commit
357 */
358 static int replmd_add_backlink(struct ldb_module *module, const struct dsdb_schema *schema,
359 struct GUID *forward_guid, struct GUID *target_guid,
360 bool active, const struct dsdb_attribute *schema_attr, bool immediate)
361 {
362 const struct dsdb_attribute *target_attr;
363 struct la_backlink *bl;
364 struct replmd_private *replmd_private =
365 talloc_get_type_abort(ldb_module_get_private(module), struct replmd_private);
366
367 target_attr = dsdb_attribute_by_linkID(schema, schema_attr->linkID ^ 1);
368 if (!target_attr) {
369 /*
370 * windows 2003 has a broken schema where the
371 * definition of msDS-IsDomainFor is missing (which is
372 * supposed to be the backlink of the
373 * msDS-HasDomainNCs attribute
374 */
375 return LDB_SUCCESS;
376 }
377
378 /* see if its already in the list */
379 for (bl=replmd_private->la_backlinks; bl; bl=bl->next) {
380 if (GUID_equal(forward_guid, &bl->forward_guid) &&
381 GUID_equal(target_guid, &bl->target_guid) &&
382 (target_attr->lDAPDisplayName == bl->attr_name ||
383 strcmp(target_attr->lDAPDisplayName, bl->attr_name) == 0)) {
384 break;
385 }
386 }
387
388 if (bl) {
389 /* we found an existing one */
390 if (bl->active == active) {
391 return LDB_SUCCESS;
392 }
393 DLIST_REMOVE(replmd_private->la_backlinks, bl);
394 talloc_free(bl);
395 return LDB_SUCCESS;
396 }
397
398 if (replmd_private->bl_ctx == NULL) {
399 replmd_private->bl_ctx = talloc_new(replmd_private);
400 if (replmd_private->bl_ctx == NULL) {
401 ldb_module_oom(module);
402 return LDB_ERR_OPERATIONS_ERROR;
403 }
404 }
405
406 /* its a new one */
407 bl = talloc(replmd_private->bl_ctx, struct la_backlink);
408 if (bl == NULL) {
409 ldb_module_oom(module);
410 return LDB_ERR_OPERATIONS_ERROR;
411 }
412
413 /* Ensure the schema does not go away before the bl->attr_name is used */
414 if (!talloc_reference(bl, schema)) {
415 talloc_free(bl);
416 ldb_module_oom(module);
417 return LDB_ERR_OPERATIONS_ERROR;
418 }
419
420 bl->attr_name = target_attr->lDAPDisplayName;
421 bl->forward_guid = *forward_guid;
422 bl->target_guid = *target_guid;
423 bl->active = active;
424
425 /* the caller may ask for this backlink to be processed
426 immediately */
427 if (immediate) {
428 int ret = replmd_process_backlink(module, bl, NULL);
429 talloc_free(bl);
430 return ret;
431 }
432
433 DLIST_ADD(replmd_private->la_backlinks, bl);
434
435 return LDB_SUCCESS;
436 }
437
438
439 /*
440 * Callback for most write operations in this module:
441 *
442 * notify the repl task that a object has changed. The notifies are
443 * gathered up in the replmd_private structure then written to the
444 * @REPLCHANGED object in each partition during the prepare_commit
445 */
446 static int replmd_op_callback(struct ldb_request *req, struct ldb_reply *ares)
447 {
448 int ret;
449 struct replmd_replicated_request *ac =
450 talloc_get_type_abort(req->context, struct replmd_replicated_request);
451 struct replmd_private *replmd_private =
452 talloc_get_type_abort(ldb_module_get_private(ac->module), struct replmd_private);
453 struct nc_entry *modified_partition;
454 struct ldb_control *partition_ctrl;
455 const struct dsdb_control_current_partition *partition;
456
457 struct ldb_control **controls;
458
459 partition_ctrl = ldb_reply_get_control(ares, DSDB_CONTROL_CURRENT_PARTITION_OID);
460
461 controls = ares->controls;
462 if (ldb_request_get_control(ac->req,
463 DSDB_CONTROL_CURRENT_PARTITION_OID) == NULL) {
464 /*
465 * Remove the current partition control from what we pass up
466 * the chain if it hasn't been requested manually.
467 */
468 controls = ldb_controls_except_specified(ares->controls, ares,
469 partition_ctrl);
470 }
471
472 if (ares->error != LDB_SUCCESS) {
473 DEBUG(5,("%s failure. Error is: %s\n", __FUNCTION__, ldb_strerror(ares->error)));
474 return ldb_module_done(ac->req, controls,
475 ares->response, ares->error);
476 }
477
478 if (ares->type != LDB_REPLY_DONE) {
479 ldb_set_errstring(ldb_module_get_ctx(ac->module), "Invalid reply type for notify\n!");
480 return ldb_module_done(ac->req, NULL,
481 NULL, LDB_ERR_OPERATIONS_ERROR);
482 }
483
484 if (!partition_ctrl) {
485 ldb_set_errstring(ldb_module_get_ctx(ac->module),"No partition control on reply");
486 return ldb_module_done(ac->req, NULL,
487 NULL, LDB_ERR_OPERATIONS_ERROR);
488 }
489
490 partition = talloc_get_type_abort(partition_ctrl->data,
491 struct dsdb_control_current_partition);
492
493 if (ac->seq_num > 0) {
494 for (modified_partition = replmd_private->ncs; modified_partition;
495 modified_partition = modified_partition->next) {
496 if (ldb_dn_compare(modified_partition->dn, partition->dn) == 0) {
497 break;
498 }
499 }
500
501 if (modified_partition == NULL) {
502 modified_partition = talloc_zero(replmd_private, struct nc_entry);
503 if (!modified_partition) {
504 ldb_oom(ldb_module_get_ctx(ac->module));
505 return ldb_module_done(ac->req, NULL,
506 NULL, LDB_ERR_OPERATIONS_ERROR);
507 }
508 modified_partition->dn = ldb_dn_copy(modified_partition, partition->dn);
509 if (!modified_partition->dn) {
510 ldb_oom(ldb_module_get_ctx(ac->module));
511 return ldb_module_done(ac->req, NULL,
512 NULL, LDB_ERR_OPERATIONS_ERROR);
513 }
514 DLIST_ADD(replmd_private->ncs, modified_partition);
515 }
516
517 if (ac->seq_num > modified_partition->mod_usn) {
518 modified_partition->mod_usn = ac->seq_num;
519 if (ac->is_urgent) {
520 modified_partition->mod_usn_urgent = ac->seq_num;
521 }
522 }
523 }
524
525 if (ac->apply_mode) {
526 ret = replmd_replicated_apply_isDeleted(ac);
527 if (ret != LDB_SUCCESS) {
528 return ldb_module_done(ac->req, NULL, NULL, ret);
529 }
530 return ret;
531 } else {
532 /* free the partition control container here, for the
533 * common path. Other cases will have it cleaned up
534 * eventually with the ares */
535 talloc_free(partition_ctrl);
536 return ldb_module_done(ac->req, controls,
537 ares->response, LDB_SUCCESS);
538 }
539 }
540
541
542 /*
543 * update a @REPLCHANGED record in each partition if there have been
544 * any writes of replicated data in the partition
545 */
546 static int replmd_notify_store(struct ldb_module *module, struct ldb_request *parent)
547 {
548 struct replmd_private *replmd_private =
549 talloc_get_type(ldb_module_get_private(module), struct replmd_private);
550
551 while (replmd_private->ncs) {
552 int ret;
553 struct nc_entry *modified_partition = replmd_private->ncs;
554
555 ret = dsdb_module_save_partition_usn(module, modified_partition->dn,
556 modified_partition->mod_usn,
557 modified_partition->mod_usn_urgent, parent);
558 if (ret != LDB_SUCCESS) {
559 DEBUG(0,(__location__ ": Failed to save partition uSN for %s\n",
560 ldb_dn_get_linearized(modified_partition->dn)));
561 return ret;
562 }
563 DLIST_REMOVE(replmd_private->ncs, modified_partition);
564 talloc_free(modified_partition);
565 }
566
567 return LDB_SUCCESS;
568 }
569
570
571 /*
572 created a replmd_replicated_request context
573 */
574 static struct replmd_replicated_request *replmd_ctx_init(struct ldb_module *module,
575 struct ldb_request *req)
576 {
577 struct ldb_context *ldb;
578 struct replmd_replicated_request *ac;
579
580 ldb = ldb_module_get_ctx(module);
581
582 ac = talloc_zero(req, struct replmd_replicated_request);
583 if (ac == NULL) {
584 ldb_oom(ldb);
585 return NULL;
586 }
587
588 ac->module = module;
589 ac->req = req;
590
591 ac->schema = dsdb_get_schema(ldb, ac);
592 if (!ac->schema) {
593 ldb_debug_set(ldb, LDB_DEBUG_FATAL,
594 "replmd_modify: no dsdb_schema loaded");
595 DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
596 return NULL;
597 }
598
599 return ac;
600 }
601
602 /*
603 add a time element to a record
604 */
605 static int add_time_element(struct ldb_message *msg, const char *attr, time_t t)
606 {
607 struct ldb_message_element *el;
608 char *s;
609 int ret;
610
611 if (ldb_msg_find_element(msg, attr) != NULL) {
612 return LDB_SUCCESS;
613 }
614
615 s = ldb_timestring(msg, t);
616 if (s == NULL) {
617 return LDB_ERR_OPERATIONS_ERROR;
618 }
619
620 ret = ldb_msg_add_string(msg, attr, s);
621 if (ret != LDB_SUCCESS) {
622 return ret;
623 }
624
625 el = ldb_msg_find_element(msg, attr);
626 /* always set as replace. This works because on add ops, the flag
627 is ignored */
628 el->flags = LDB_FLAG_MOD_REPLACE;
629
630 return LDB_SUCCESS;
631 }
632
633 /*
634 add a uint64_t element to a record
635 */
636 static int add_uint64_element(struct ldb_context *ldb, struct ldb_message *msg,
637 const char *attr, uint64_t v)
638 {
639 struct ldb_message_element *el;
640 int ret;
641
642 if (ldb_msg_find_element(msg, attr) != NULL) {
643 return LDB_SUCCESS;
644 }
645
646 ret = samdb_msg_add_uint64(ldb, msg, msg, attr, v);
647 if (ret != LDB_SUCCESS) {
648 return ret;
649 }
650
651 el = ldb_msg_find_element(msg, attr);
652 /* always set as replace. This works because on add ops, the flag
653 is ignored */
654 el->flags = LDB_FLAG_MOD_REPLACE;
655
656 return LDB_SUCCESS;
657 }
658
659 static int replmd_replPropertyMetaData1_attid_sort(const struct replPropertyMetaData1 *m1,
660 const struct replPropertyMetaData1 *m2,
661 const uint32_t *rdn_attid)
662 {
663 if (m1->attid == m2->attid) {
664 return 0;
665 }
666
667 /*
668 * the rdn attribute should be at the end!
669 * so we need to return a value greater than zero
670 * which means m1 is greater than m2
671 */
672 if (m1->attid == *rdn_attid) {
673 return 1;
674 }
675
676 /*
677 * the rdn attribute should be at the end!
678 * so we need to return a value less than zero
679 * which means m2 is greater than m1
680 */
681 if (m2->attid == *rdn_attid) {
682 return -1;
683 }
684
685 return m1->attid > m2->attid ? 1 : -1;
686 }
687
688 static int replmd_replPropertyMetaDataCtr1_sort(struct replPropertyMetaDataCtr1 *ctr1,
689 const struct dsdb_schema *schema,
690 struct ldb_dn *dn)
691 {
692 const char *rdn_name;
693 const struct dsdb_attribute *rdn_sa;
694
695 rdn_name = ldb_dn_get_rdn_name(dn);
696 if (!rdn_name) {
697 DEBUG(0,(__location__ ": No rDN for %s?\n", ldb_dn_get_linearized(dn)));
698 return LDB_ERR_OPERATIONS_ERROR;
699 }
700
701 rdn_sa = dsdb_attribute_by_lDAPDisplayName(schema, rdn_name);
702 if (rdn_sa == NULL) {
703 DEBUG(0,(__location__ ": No sa found for rDN %s for %s\n", rdn_name, ldb_dn_get_linearized(dn)));
704 return LDB_ERR_OPERATIONS_ERROR;
705 }
706
707 DEBUG(6,("Sorting rpmd with attid exception %u rDN=%s DN=%s\n",
708 rdn_sa->attributeID_id, rdn_name, ldb_dn_get_linearized(dn)));
709
710 LDB_TYPESAFE_QSORT(ctr1->array, ctr1->count, &rdn_sa->attributeID_id, replmd_replPropertyMetaData1_attid_sort);
711
712 return LDB_SUCCESS;
713 }
714
715 static int replmd_ldb_message_element_attid_sort(const struct ldb_message_element *e1,
716 const struct ldb_message_element *e2,
717 const struct dsdb_schema *schema)
718 {
719 const struct dsdb_attribute *a1;
720 const struct dsdb_attribute *a2;
721
722 /*
723 * TODO: make this faster by caching the dsdb_attribute pointer
724 * on the ldb_messag_element
725 */
726
727 a1 = dsdb_attribute_by_lDAPDisplayName(schema, e1->name);
728 a2 = dsdb_attribute_by_lDAPDisplayName(schema, e2->name);
729
730 /*
731 * TODO: remove this check, we should rely on e1 and e2 having valid attribute names
732 * in the schema
733 */
734 if (!a1 || !a2) {
735 return strcasecmp(e1->name, e2->name);
736 }
737 if (a1->attributeID_id == a2->attributeID_id) {
738 return 0;
739 }
740 return a1->attributeID_id > a2->attributeID_id ? 1 : -1;
741 }
742
743 static void replmd_ldb_message_sort(struct ldb_message *msg,
744 const struct dsdb_schema *schema)
745 {
746 LDB_TYPESAFE_QSORT(msg->elements, msg->num_elements, schema, replmd_ldb_message_element_attid_sort);
747 }
748
749 static int replmd_build_la_val(TALLOC_CTX *mem_ctx, struct ldb_val *v, struct dsdb_dn *dsdb_dn,
750 const struct GUID *invocation_id, uint64_t seq_num,
751 uint64_t local_usn, NTTIME nttime, uint32_t version, bool deleted);
752
753
754 /*
755 fix up linked attributes in replmd_add.
756 This involves setting up the right meta-data in extended DN
757 components, and creating backlinks to the object
758 */
759 static int replmd_add_fix_la(struct ldb_module *module, struct ldb_message_element *el,
760 uint64_t seq_num, const struct GUID *invocationId, time_t t,
761 struct GUID *guid, const struct dsdb_attribute *sa, struct ldb_request *parent)
762 {
763 unsigned int i;
764 TALLOC_CTX *tmp_ctx = talloc_new(el->values);
765 struct ldb_context *ldb = ldb_module_get_ctx(module);
766
767 /* We will take a reference to the schema in replmd_add_backlink */
768 const struct dsdb_schema *schema = dsdb_get_schema(ldb, NULL);
769 NTTIME now;
770
771 unix_to_nt_time(&now, t);
772
773 for (i=0; i<el->num_values; i++) {
774 struct ldb_val *v = &el->values[i];
775 struct dsdb_dn *dsdb_dn = dsdb_dn_parse(tmp_ctx, ldb, v, sa->syntax->ldap_oid);
776 struct GUID target_guid;
777 NTSTATUS status;
778 int ret;
779
780 /* note that the DN already has the extended
781 components from the extended_dn_store module */
782 status = dsdb_get_extended_dn_guid(dsdb_dn->dn, &target_guid, "GUID");
783 if (!NT_STATUS_IS_OK(status) || GUID_all_zero(&target_guid)) {
784 ret = dsdb_module_guid_by_dn(module, dsdb_dn->dn, &target_guid, parent);
785 if (ret != LDB_SUCCESS) {
786 talloc_free(tmp_ctx);
787 return ret;
788 }
789 ret = dsdb_set_extended_dn_guid(dsdb_dn->dn, &target_guid, "GUID");
790 if (ret != LDB_SUCCESS) {
791 talloc_free(tmp_ctx);
792 return ret;
793 }
794 }
795
796 ret = replmd_build_la_val(el->values, v, dsdb_dn, invocationId,
797 seq_num, seq_num, now, 0, false);
798 if (ret != LDB_SUCCESS) {
799 talloc_free(tmp_ctx);
800 return ret;
801 }
802
803 ret = replmd_add_backlink(module, schema, guid, &target_guid, true, sa, false);
804 if (ret != LDB_SUCCESS) {
805 talloc_free(tmp_ctx);
806 return ret;
807 }
808 }
809
810 talloc_free(tmp_ctx);
811 return LDB_SUCCESS;
812 }
813
814
815 /*
816 intercept add requests
817 */
818 static int replmd_add(struct ldb_module *module, struct ldb_request *req)
819 {
820 struct samldb_msds_intid_persistant *msds_intid_struct;
821 struct ldb_context *ldb;
822 struct ldb_control *control;
823 struct replmd_replicated_request *ac;
824 enum ndr_err_code ndr_err;
825 struct ldb_request *down_req;
826 struct ldb_message *msg;
827 const DATA_BLOB *guid_blob;
828 struct GUID guid;
829 struct replPropertyMetaDataBlob nmd;
830 struct ldb_val nmd_value;
831 const struct GUID *our_invocation_id;
832 time_t t = time(NULL);
833 NTTIME now;
834 char *time_str;
835 int ret;
836 unsigned int i;
837 unsigned int functional_level;
838 uint32_t ni=0;
839 bool allow_add_guid = false;
840 bool remove_current_guid = false;
841 bool is_urgent = false;
842 struct ldb_message_element *objectclass_el;
843
844 /* check if there's a show relax control (used by provision to say 'I know what I'm doing') */
845 control = ldb_request_get_control(req, LDB_CONTROL_RELAX_OID);
846 if (control) {
847 allow_add_guid = true;
848 }
849
850 /* do not manipulate our control entries */
851 if (ldb_dn_is_special(req->op.add.message->dn)) {
852 return ldb_next_request(module, req);
853 }
854
855 ldb = ldb_module_get_ctx(module);
856
857 ldb_debug(ldb, LDB_DEBUG_TRACE, "replmd_add\n");
858
859 guid_blob = ldb_msg_find_ldb_val(req->op.add.message, "objectGUID");
860 if (guid_blob != NULL) {
861 if (!allow_add_guid) {
862 ldb_set_errstring(ldb,
863 "replmd_add: it's not allowed to add an object with objectGUID!");
864 return LDB_ERR_UNWILLING_TO_PERFORM;
865 } else {
866 NTSTATUS status = GUID_from_data_blob(guid_blob,&guid);
867 if (!NT_STATUS_IS_OK(status)) {
868 ldb_set_errstring(ldb,
869 "replmd_add: Unable to parse the 'objectGUID' as a GUID!");
870 return LDB_ERR_UNWILLING_TO_PERFORM;
871 }
872 /* we remove this attribute as it can be a string and
873 * will not be treated correctly and then we will re-add
874 * it later on in the good format */
875 remove_current_guid = true;
876 }
877 } else {
878 /* a new GUID */
879 guid = GUID_random();
880 }
881
882 ac = replmd_ctx_init(module, req);
883 if (ac == NULL) {
884 return ldb_module_oom(module);
885 }
886
887 functional_level = dsdb_functional_level(ldb);
888
889 /* Get a sequence number from the backend */
890 ret = ldb_sequence_number(ldb, LDB_SEQ_NEXT, &ac->seq_num);
891 if (ret != LDB_SUCCESS) {
892 talloc_free(ac);
893 return ret;
894 }
895
896 /* get our invocationId */
897 our_invocation_id = samdb_ntds_invocation_id(ldb);
898 if (!our_invocation_id) {
899 ldb_debug_set(ldb, LDB_DEBUG_ERROR,
900 "replmd_add: unable to find invocationId\n");
901 talloc_free(ac);
902 return LDB_ERR_OPERATIONS_ERROR;
903 }
904
905 /* we have to copy the message as the caller might have it as a const */
906 msg = ldb_msg_copy_shallow(ac, req->op.add.message);
907 if (msg == NULL) {
908 ldb_oom(ldb);
909 talloc_free(ac);
910 return LDB_ERR_OPERATIONS_ERROR;
911 }
912
913 /* generated times */
914 unix_to_nt_time(&now, t);
915 time_str = ldb_timestring(msg, t);
916 if (!time_str) {
917 ldb_oom(ldb);
918 talloc_free(ac);
919 return LDB_ERR_OPERATIONS_ERROR;
920 }
921 if (remove_current_guid) {
922 ldb_msg_remove_attr(msg,"objectGUID");
923 }
924
925 /*
926 * remove autogenerated attributes
927 */
928 ldb_msg_remove_attr(msg, "whenCreated");
929 ldb_msg_remove_attr(msg, "whenChanged");
930 ldb_msg_remove_attr(msg, "uSNCreated");
931 ldb_msg_remove_attr(msg, "uSNChanged");
932 ldb_msg_remove_attr(msg, "replPropertyMetaData");
933
934 /*
935 * readd replicated attributes
936 */
937 ret = ldb_msg_add_string(msg, "whenCreated", time_str);
938 if (ret != LDB_SUCCESS) {
939 ldb_oom(ldb);
940 talloc_free(ac);
941 return ret;
942 }
943
944 /* build the replication meta_data */
945 ZERO_STRUCT(nmd);
946 nmd.version = 1;
947 nmd.ctr.ctr1.count = msg->num_elements;
948 nmd.ctr.ctr1.array = talloc_array(msg,
949 struct replPropertyMetaData1,
950 nmd.ctr.ctr1.count);
951 if (!nmd.ctr.ctr1.array) {
952 ldb_oom(ldb);
953 talloc_free(ac);
954 return LDB_ERR_OPERATIONS_ERROR;
955 }
956
957 for (i=0; i < msg->num_elements; i++) {
958 struct ldb_message_element *e = &msg->elements[i];
959 struct replPropertyMetaData1 *m = &nmd.ctr.ctr1.array[ni];
960 const struct dsdb_attribute *sa;
961
962 if (e->name[0] == '@') continue;
963
964 sa = dsdb_attribute_by_lDAPDisplayName(ac->schema, e->name);
965 if (!sa) {
966 ldb_debug_set(ldb, LDB_DEBUG_ERROR,
967 "replmd_add: attribute '%s' not defined in schema\n",
968 e->name);
969 talloc_free(ac);
970 return LDB_ERR_NO_SUCH_ATTRIBUTE;
971 }
972
973 if ((sa->systemFlags & DS_FLAG_ATTR_NOT_REPLICATED) || (sa->systemFlags & DS_FLAG_ATTR_IS_CONSTRUCTED)) {
974 /* if the attribute is not replicated (0x00000001)
975 * or constructed (0x00000004) it has no metadata
976 */
977 continue;
978 }
979
980 if (sa->linkID != 0 && functional_level > DS_DOMAIN_FUNCTION_2000) {
981 ret = replmd_add_fix_la(module, e, ac->seq_num, our_invocation_id, t, &guid, sa, req);
982 if (ret != LDB_SUCCESS) {
983 talloc_free(ac);
984 return ret;
985 }
986 /* linked attributes are not stored in
987 replPropertyMetaData in FL above w2k */
988 continue;
989 }
990
991 m->attid = sa->attributeID_id;
992 m->version = 1;
993 if (m->attid == 0x20030) {
994 const struct ldb_val *rdn_val = ldb_dn_get_rdn_val(msg->dn);
995 const char* rdn;
996
997 if (rdn_val == NULL) {
998 ldb_oom(ldb);
999 talloc_free(ac);
1000 return LDB_ERR_OPERATIONS_ERROR;
1001 }
1002
1003 rdn = (const char*)rdn_val->data;
1004 if (strcmp(rdn, "Deleted Objects") == 0) {
1005 /*
1006 * Set the originating_change_time to 29/12/9999 at 23:59:59
1007 * as specified in MS-ADTS 7.1.1.4.2 Deleted Objects Container
1008 */
1009 m->originating_change_time = DELETED_OBJECT_CONTAINER_CHANGE_TIME;
1010 } else {
1011 m->originating_change_time = now;
1012 }
1013 } else {
1014 m->originating_change_time = now;
1015 }
1016 m->originating_invocation_id = *our_invocation_id;
1017 m->originating_usn = ac->seq_num;
1018 m->local_usn = ac->seq_num;
1019 ni++;
1020 }
1021
1022 /* fix meta data count */
1023 nmd.ctr.ctr1.count = ni;
1024
1025 /*
1026 * sort meta data array, and move the rdn attribute entry to the end
1027 */
1028 ret = replmd_replPropertyMetaDataCtr1_sort(&nmd.ctr.ctr1, ac->schema, msg->dn);
1029 if (ret != LDB_SUCCESS) {
1030 talloc_free(ac);
1031 return ret;
1032 }
1033
1034 /* generated NDR encoded values */
1035 ndr_err = ndr_push_struct_blob(&nmd_value, msg,
1036 &nmd,
1037 (ndr_push_flags_fn_t)ndr_push_replPropertyMetaDataBlob);
1038 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1039 ldb_oom(ldb);
1040 talloc_free(ac);
1041 return LDB_ERR_OPERATIONS_ERROR;
1042 }
1043
1044 /*
1045 * add the autogenerated values
1046 */
1047 ret = dsdb_msg_add_guid(msg, &guid, "objectGUID");
1048 if (ret != LDB_SUCCESS) {
1049 ldb_oom(ldb);
1050 talloc_free(ac);
1051 return ret;
1052 }
1053 ret = ldb_msg_add_string(msg, "whenChanged", time_str);
1054 if (ret != LDB_SUCCESS) {
1055 ldb_oom(ldb);
1056 talloc_free(ac);
1057 return ret;
1058 }
1059 ret = samdb_msg_add_uint64(ldb, msg, msg, "uSNCreated", ac->seq_num);
1060 if (ret != LDB_SUCCESS) {
1061 ldb_oom(ldb);
1062 talloc_free(ac);
1063 return ret;
1064 }
1065 ret = samdb_msg_add_uint64(ldb, msg, msg, "uSNChanged", ac->seq_num);
1066 if (ret != LDB_SUCCESS) {
1067 ldb_oom(ldb);
1068 talloc_free(ac);
1069 return ret;
1070 }
1071 ret = ldb_msg_add_value(msg, "replPropertyMetaData", &nmd_value, NULL);
1072 if (ret != LDB_SUCCESS) {
1073 ldb_oom(ldb);
1074 talloc_free(ac);
1075 return ret;
1076 }
1077
1078 /*
1079 * sort the attributes by attid before storing the object
1080 */
1081 replmd_ldb_message_sort(msg, ac->schema);
1082
1083 objectclass_el = ldb_msg_find_element(msg, "objectClass");
1084 is_urgent = replmd_check_urgent_objectclass(objectclass_el,
1085 REPL_URGENT_ON_CREATE);
1086
1087 ac->is_urgent = is_urgent;
1088 ret = ldb_build_add_req(&down_req, ldb, ac,
1089 msg,
1090 req->controls,
1091 ac, replmd_op_callback,
1092 req);
1093
1094 LDB_REQ_SET_LOCATION(down_req);
1095 if (ret != LDB_SUCCESS) {
1096 talloc_free(ac);
1097 return ret;
1098 }
1099
1100 /* current partition control is needed by "replmd_op_callback" */
1101 if (ldb_request_get_control(req, DSDB_CONTROL_CURRENT_PARTITION_OID) == NULL) {
1102 ret = ldb_request_add_control(down_req,
1103 DSDB_CONTROL_CURRENT_PARTITION_OID,
1104 false, NULL);
1105 if (ret != LDB_SUCCESS) {
1106 talloc_free(ac);
1107 return ret;
1108 }
1109 }
1110
1111 if (functional_level == DS_DOMAIN_FUNCTION_2000) {
1112 ret = ldb_request_add_control(down_req, DSDB_CONTROL_APPLY_LINKS, false, NULL);
1113 if (ret != LDB_SUCCESS) {
1114 talloc_free(ac);
1115 return ret;
1116 }
1117 }
1118
1119 /* mark the control done */
1120 if (control) {
1121 control->critical = 0;
1122 }
1123 if (ldb_dn_compare_base(ac->schema->base_dn, req->op.add.message->dn) != 0) {
1124
1125 /* Update the usn in the SAMLDB_MSDS_INTID_OPAQUE opaque */
1126 msds_intid_struct = (struct samldb_msds_intid_persistant *) ldb_get_opaque(ldb, SAMLDB_MSDS_INTID_OPAQUE);
1127 if (msds_intid_struct) {
1128 msds_intid_struct->usn = ac->seq_num;
1129 }
1130 }
1131 /* go on with the call chain */
1132 return ldb_next_request(module, down_req);
1133 }
1134
1135
1136 /*
1137 * update the replPropertyMetaData for one element
1138 */
1139 static int replmd_update_rpmd_element(struct ldb_context *ldb,
1140 struct ldb_message *msg,
1141 struct ldb_message_element *el,
1142 struct ldb_message_element *old_el,
1143 struct replPropertyMetaDataBlob *omd,
1144 const struct dsdb_schema *schema,
1145 uint64_t *seq_num,
1146 const struct GUID *our_invocation_id,
1147 NTTIME now,
1148 struct ldb_request *req)
1149 {
1150 uint32_t i;
1151 const struct dsdb_attribute *a;
1152 struct replPropertyMetaData1 *md1;
1153 bool may_skip = false;
1154
1155 a = dsdb_attribute_by_lDAPDisplayName(schema, el->name);
1156 if (a == NULL) {
1157 if (ldb_request_get_control(req, LDB_CONTROL_RELAX_OID)) {
1158 /* allow this to make it possible for dbcheck
1159 to remove bad attributes */
1160 return LDB_SUCCESS;
1161 }
1162
1163 DEBUG(0,(__location__ ": Unable to find attribute %s in schema\n",
1164 el->name));
1165 return LDB_ERR_OPERATIONS_ERROR;
1166 }
1167
1168 if ((a->systemFlags & DS_FLAG_ATTR_NOT_REPLICATED) || (a->systemFlags & DS_FLAG_ATTR_IS_CONSTRUCTED)) {
1169 return LDB_SUCCESS;
1170 }
1171
1172 /*
1173 * if the attribute's value haven't changed, and this isn't
1174 * just a delete of everything then return LDB_SUCCESS Unless
1175 * we have the provision control or if the attribute is
1176 * interSiteTopologyGenerator as this page explain:
1177 * http://support.microsoft.com/kb/224815 this attribute is
1178 * periodicaly written by the DC responsible for the intersite
1179 * generation in a given site
1180 *
1181 * Unchanged could be deleting or replacing an already-gone
1182 * thing with an unconstrained delete/empty replace or a
1183 * replace with the same value, but not an add with the same
1184 * value because that could be about adding a duplicate (which
1185 * is for someone else to error out on).
1186 */
1187 if (old_el != NULL && ldb_msg_element_equal_ordered(el, old_el)) {
1188 if (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_REPLACE) {
1189 may_skip = true;
1190 }
1191 } else if (old_el == NULL && el->num_values == 0) {
1192 if (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_REPLACE) {
1193 may_skip = true;
1194 } else if (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_DELETE) {
1195 may_skip = true;
1196 }
1197 }
1198
1199 if (may_skip) {
1200 if (strcmp(el->name, "interSiteTopologyGenerator") != 0 &&
1201 !ldb_request_get_control(req, LDB_CONTROL_PROVISION_OID)) {
1202 /*
1203 * allow this to make it possible for dbcheck
1204 * to rebuild broken metadata
1205 */
1206 return LDB_SUCCESS;
1207 }
1208 }
1209
1210 for (i=0; i<omd->ctr.ctr1.count; i++) {
1211 if (a->attributeID_id == omd->ctr.ctr1.array[i].attid) break;
1212 }
1213
1214 if (a->linkID != 0 && dsdb_functional_level(ldb) > DS_DOMAIN_FUNCTION_2000) {
1215 /* linked attributes are not stored in
1216 replPropertyMetaData in FL above w2k, but we do
1217 raise the seqnum for the object */
1218 if (*seq_num == 0 &&
1219 ldb_sequence_number(ldb, LDB_SEQ_NEXT, seq_num) != LDB_SUCCESS) {
1220 return LDB_ERR_OPERATIONS_ERROR;
1221 }
1222 return LDB_SUCCESS;
1223 }
1224
1225 if (i == omd->ctr.ctr1.count) {
1226 /* we need to add a new one */
1227 omd->ctr.ctr1.array = talloc_realloc(msg, omd->ctr.ctr1.array,
1228 struct replPropertyMetaData1, omd->ctr.ctr1.count+1);
1229 if (omd->ctr.ctr1.array == NULL) {
1230 ldb_oom(ldb);
1231 return LDB_ERR_OPERATIONS_ERROR;
1232 }
1233 omd->ctr.ctr1.count++;
1234 ZERO_STRUCT(omd->ctr.ctr1.array[i]);
1235 }
1236
1237 /* Get a new sequence number from the backend. We only do this
1238 * if we have a change that requires a new
1239 * replPropertyMetaData element
1240 */
1241 if (*seq_num == 0) {
1242 int ret = ldb_sequence_number(ldb, LDB_SEQ_NEXT, seq_num);
1243 if (ret != LDB_SUCCESS) {
1244 return LDB_ERR_OPERATIONS_ERROR;
1245 }
1246 }
1247
1248 md1 = &omd->ctr.ctr1.array[i];
1249 md1->version++;
1250 md1->attid = a->attributeID_id;
1251 if (md1->attid == 0x20030) {
1252 const struct ldb_val *rdn_val = ldb_dn_get_rdn_val(msg->dn);
1253 const char* rdn;
1254
1255 if (rdn_val == NULL) {
1256 ldb_oom(ldb);
1257 return LDB_ERR_OPERATIONS_ERROR;
1258 }
1259
1260 rdn = (const char*)rdn_val->data;
1261 if (strcmp(rdn, "Deleted Objects") == 0) {
1262 /*
1263 * Set the originating_change_time to 29/12/9999 at 23:59:59
1264 * as specified in MS-ADTS 7.1.1.4.2 Deleted Objects Container
1265 */
1266 md1->originating_change_time = DELETED_OBJECT_CONTAINER_CHANGE_TIME;
1267 } else {
1268 md1->originating_change_time = now;
1269 }
1270 } else {
1271 md1->originating_change_time = now;
1272 }
1273 md1->originating_invocation_id = *our_invocation_id;
1274 md1->originating_usn = *seq_num;
1275 md1->local_usn = *seq_num;
1276
1277 return LDB_SUCCESS;
1278 }
1279
1280 static uint64_t find_max_local_usn(struct replPropertyMetaDataBlob omd)
1281 {
1282 uint32_t count = omd.ctr.ctr1.count;
1283 uint64_t max = 0;
1284 uint32_t i;
1285 for (i=0; i < count; i++) {
1286 struct replPropertyMetaData1 m = omd.ctr.ctr1.array[i];
1287 if (max < m.local_usn) {
1288 max = m.local_usn;
1289 }
1290 }
1291 return max;
1292 }
1293
1294 /*
1295 * update the replPropertyMetaData object each time we modify an
1296 * object. This is needed for DRS replication, as the merge on the
1297 * client is based on this object
1298 */
1299 static int replmd_update_rpmd(struct ldb_module *module,
1300 const struct dsdb_schema *schema,
1301 struct ldb_request *req,
1302 const char * const *rename_attrs,
1303 struct ldb_message *msg, uint64_t *seq_num,
1304 time_t t,
1305 bool *is_urgent, bool *rodc)
1306 {
1307 const struct ldb_val *omd_value;
1308 enum ndr_err_code ndr_err;
1309 struct replPropertyMetaDataBlob omd;
1310 unsigned int i;
1311 NTTIME now;
1312 const struct GUID *our_invocation_id;
1313 int ret;
1314 const char * const *attrs = NULL;
1315 const char * const attrs1[] = { "replPropertyMetaData", "*", NULL };
1316 const char * const attrs2[] = { "uSNChanged", "objectClass", "instanceType", NULL };
1317 struct ldb_result *res;
1318 struct ldb_context *ldb;
1319 struct ldb_message_element *objectclass_el;
1320 enum urgent_situation situation;
1321 bool rmd_is_provided;
1322
1323 if (rename_attrs) {
1324 attrs = rename_attrs;
1325 } else {
1326 attrs = attrs1;
1327 }
1328
1329 ldb = ldb_module_get_ctx(module);
1330
1331 our_invocation_id = samdb_ntds_invocation_id(ldb);
1332 if (!our_invocation_id) {
1333 /* this happens during an initial vampire while
1334 updating the schema */
1335 DEBUG(5,("No invocationID - skipping replPropertyMetaData update\n"));
1336 return LDB_SUCCESS;
1337 }
1338
1339 unix_to_nt_time(&now, t);
1340
1341 if (ldb_request_get_control(req, DSDB_CONTROL_CHANGEREPLMETADATA_OID)) {
1342 rmd_is_provided = true;
1343 } else {
1344 rmd_is_provided = false;
1345 }
1346
1347 /* if isDeleted is present and is TRUE, then we consider we are deleting,
1348 * otherwise we consider we are updating */
1349 if (ldb_msg_check_string_attribute(msg, "isDeleted", "TRUE")) {
1350 situation = REPL_URGENT_ON_DELETE;
1351 } else if (rename_attrs) {
1352 situation = REPL_URGENT_ON_CREATE | REPL_URGENT_ON_DELETE;
1353 } else {
1354 situation = REPL_URGENT_ON_UPDATE;
1355 }
1356
1357 if (rmd_is_provided) {
1358 /* In this case the change_replmetadata control was supplied */
1359 /* We check that it's the only attribute that is provided
1360 * (it's a rare case so it's better to keep the code simplier)
1361 * We also check that the highest local_usn is bigger than
1362 * uSNChanged. */
1363 uint64_t db_seq;
1364 if( msg->num_elements != 1 ||
1365 strncmp(msg->elements[0].name,
1366 "replPropertyMetaData", 20) ) {
1367 DEBUG(0,(__location__ ": changereplmetada control called without "\
1368 "a specified replPropertyMetaData attribute or with others\n"));
1369 return LDB_ERR_OPERATIONS_ERROR;
1370 }
1371 if (situation != REPL_URGENT_ON_UPDATE) {
1372 DEBUG(0,(__location__ ": changereplmetada control can't be called when deleting an object\n"));
1373 return LDB_ERR_OPERATIONS_ERROR;
1374 }
1375 omd_value = ldb_msg_find_ldb_val(msg, "replPropertyMetaData");
1376 if (!omd_value) {
1377 DEBUG(0,(__location__ ": replPropertyMetaData was not specified for Object %s\n",
1378 ldb_dn_get_linearized(msg->dn)));
1379 return LDB_ERR_OPERATIONS_ERROR;
1380 }
1381 ndr_err = ndr_pull_struct_blob(omd_value, msg, &omd,
1382 (ndr_pull_flags_fn_t)ndr_pull_replPropertyMetaDataBlob);
1383 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1384 DEBUG(0,(__location__ ": Failed to parse replPropertyMetaData for %s\n",
1385 ldb_dn_get_linearized(msg->dn)));
1386 return LDB_ERR_OPERATIONS_ERROR;
1387 }
1388 *seq_num = find_max_local_usn(omd);
1389
1390 ret = dsdb_module_search_dn(module, msg, &res, msg->dn, attrs2,
1391 DSDB_FLAG_NEXT_MODULE |
1392 DSDB_SEARCH_SHOW_RECYCLED |
1393 DSDB_SEARCH_SHOW_EXTENDED_DN |
1394 DSDB_SEARCH_SHOW_DN_IN_STORAGE_FORMAT |
1395 DSDB_SEARCH_REVEAL_INTERNALS, req);
1396
1397 if (ret != LDB_SUCCESS) {
1398 return ret;
1399 }
1400
1401 objectclass_el = ldb_msg_find_element(res->msgs[0], "objectClass");
1402 if (is_urgent && replmd_check_urgent_objectclass(objectclass_el,
1403 situation)) {
1404 *is_urgent = true;
1405 }
1406
1407 db_seq = ldb_msg_find_attr_as_uint64(res->msgs[0], "uSNChanged", 0);
1408 if (*seq_num <= db_seq) {
1409 DEBUG(0,(__location__ ": changereplmetada control provided but max(local_usn)"\
1410 " is less or equal to uSNChanged (max = %lld uSNChanged = %lld)\n",
1411 (long long)*seq_num, (long long)db_seq));
1412 return LDB_ERR_OPERATIONS_ERROR;
1413 }
1414
1415 } else {
1416 /* search for the existing replPropertyMetaDataBlob. We need
1417 * to use REVEAL and ask for DNs in storage format to support
1418 * the check for values being the same in
1419 * replmd_update_rpmd_element()
1420 */
1421 ret = dsdb_module_search_dn(module, msg, &res, msg->dn, attrs,
1422 DSDB_FLAG_NEXT_MODULE |
1423 DSDB_SEARCH_SHOW_RECYCLED |
1424 DSDB_SEARCH_SHOW_EXTENDED_DN |
1425 DSDB_SEARCH_SHOW_DN_IN_STORAGE_FORMAT |
1426 DSDB_SEARCH_REVEAL_INTERNALS, req);
1427 if (ret != LDB_SUCCESS) {
1428 return ret;
1429 }
1430
1431 objectclass_el = ldb_msg_find_element(res->msgs[0], "objectClass");
1432 if (is_urgent && replmd_check_urgent_objectclass(objectclass_el,
1433 situation)) {
1434 *is_urgent = true;
1435 }
1436
1437 omd_value = ldb_msg_find_ldb_val(res->msgs[0], "replPropertyMetaData");
1438 if (!omd_value) {
1439 DEBUG(0,(__location__ ": Object %s does not have a replPropertyMetaData attribute\n",
1440 ldb_dn_get_linearized(msg->dn)));
1441 return LDB_ERR_OPERATIONS_ERROR;
1442 }
1443
1444 ndr_err = ndr_pull_struct_blob(omd_value, msg, &omd,
1445 (ndr_pull_flags_fn_t)ndr_pull_replPropertyMetaDataBlob);
1446 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1447 DEBUG(0,(__location__ ": Failed to parse replPropertyMetaData for %s\n",
1448 ldb_dn_get_linearized(msg->dn)));
1449 return LDB_ERR_OPERATIONS_ERROR;
1450 }
1451
1452 if (omd.version != 1) {
1453 DEBUG(0,(__location__ ": bad version %u in replPropertyMetaData for %s\n",
1454 omd.version, ldb_dn_get_linearized(msg->dn)));
1455 return LDB_ERR_OPERATIONS_ERROR;
1456 }
1457
1458 for (i=0; i<msg->num_elements; i++) {
1459 struct ldb_message_element *old_el;
1460 old_el = ldb_msg_find_element(res->msgs[0], msg->elements[i].name);
1461 ret = replmd_update_rpmd_element(ldb, msg, &msg->elements[i], old_el, &omd, schema, seq_num,
1462 our_invocation_id, now, req);
1463 if (ret != LDB_SUCCESS) {
1464 return ret;
1465 }
1466
1467 if (is_urgent && !*is_urgent && (situation == REPL_URGENT_ON_UPDATE)) {
1468 *is_urgent = replmd_check_urgent_attribute(&msg->elements[i]);
1469 }
1470
1471 }
1472 }
1473 /*
1474 * replmd_update_rpmd_element has done an update if the
1475 * seq_num is set
1476 */
1477 if (*seq_num != 0) {
1478 struct ldb_val *md_value;
1479 struct ldb_message_element *el;
1480
1481 /*if we are RODC and this is a DRSR update then its ok*/
1482 if (!ldb_request_get_control(req, DSDB_CONTROL_REPLICATED_UPDATE_OID)
1483 && !ldb_request_get_control(req, DSDB_CONTROL_DBCHECK_MODIFY_RO_REPLICA)) {
1484 unsigned instanceType;
1485
1486 ret = samdb_rodc(ldb, rodc);
1487 if (ret != LDB_SUCCESS) {
1488 DEBUG(4, (__location__ ": unable to tell if we are an RODC\n"));
1489 } else if (*rodc) {
1490 ldb_set_errstring(ldb, "RODC modify is forbidden!");
1491 return LDB_ERR_REFERRAL;
1492 }
1493
1494 instanceType = ldb_msg_find_attr_as_uint(res->msgs[0], "instanceType", INSTANCE_TYPE_WRITE);
1495 if (!(instanceType & INSTANCE_TYPE_WRITE)) {
1496 return ldb_error(ldb, LDB_ERR_UNWILLING_TO_PERFORM,
1497 "cannot change replicated attribute on partial replica");
1498 }
1499 }
1500
1501 md_value = talloc(msg, struct ldb_val);
1502 if (md_value == NULL) {
1503 ldb_oom(ldb);
1504 return LDB_ERR_OPERATIONS_ERROR;
1505 }
1506
1507 ret = replmd_replPropertyMetaDataCtr1_sort(&omd.ctr.ctr1, schema, msg->dn);
1508 if (ret != LDB_SUCCESS) {
1509 return ret;
1510 }
1511
1512 ndr_err = ndr_push_struct_blob(md_value, msg, &omd,
1513 (ndr_push_flags_fn_t)ndr_push_replPropertyMetaDataBlob);
1514 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1515 DEBUG(0,(__location__ ": Failed to marshall replPropertyMetaData for %s\n",
1516 ldb_dn_get_linearized(msg->dn)));
1517 return LDB_ERR_OPERATIONS_ERROR;
1518 }
1519
1520 ret = ldb_msg_add_empty(msg, "replPropertyMetaData", LDB_FLAG_MOD_REPLACE, &el);
1521 if (ret != LDB_SUCCESS) {
1522 DEBUG(0,(__location__ ": Failed to add updated replPropertyMetaData %s\n",
1523 ldb_dn_get_linearized(msg->dn)));
1524 return ret;
1525 }
1526
1527 el->num_values = 1;
1528 el->values = md_value;
1529 }
1530
1531 return LDB_SUCCESS;
1532 }
1533
1534 struct parsed_dn {
1535 struct dsdb_dn *dsdb_dn;
1536 struct GUID *guid;
1537 struct ldb_val *v;
1538 };
1539
1540 static int parsed_dn_compare(struct parsed_dn *pdn1, struct parsed_dn *pdn2)
1541 {
1542 return GUID_compare(pdn1->guid, pdn2->guid);
1543 }
1544
1545 static struct parsed_dn *parsed_dn_find(struct parsed_dn *pdn,
1546 unsigned int count, struct GUID *guid,
1547 struct ldb_dn *dn)
1548 {
1549 struct parsed_dn *ret;
1550 unsigned int i;
1551 if (dn && GUID_all_zero(guid)) {
1552 /* when updating a link using DRS, we sometimes get a
1553 NULL GUID. We then need to try and match by DN */
1554 for (i=0; i<count; i++) {
1555 if (ldb_dn_compare(pdn[i].dsdb_dn->dn, dn) == 0) {
1556 dsdb_get_extended_dn_guid(pdn[i].dsdb_dn->dn, guid, "GUID");
1557 return &pdn[i];
1558 }
1559 }
1560 return NULL;
1561 }
1562 BINARY_ARRAY_SEARCH(pdn, count, guid, guid, GUID_compare, ret);
1563 return ret;
1564 }
1565
1566 /*
1567 get a series of message element values as an array of DNs and GUIDs
1568 the result is sorted by GUID
1569 */
1570 static int get_parsed_dns(struct ldb_module *module, TALLOC_CTX *mem_ctx,
1571 struct ldb_message_element *el, struct parsed_dn **pdn,
1572 const char *ldap_oid, struct ldb_request *parent)
1573 {
1574 unsigned int i;
1575 struct ldb_context *ldb = ldb_module_get_ctx(module);
1576
1577 if (el == NULL) {
1578 *pdn = NULL;
1579 return LDB_SUCCESS;
1580 }
1581
1582 (*pdn) = talloc_array(mem_ctx, struct parsed_dn, el->num_values);
1583 if (!*pdn) {
1584 ldb_module_oom(module);
1585 return LDB_ERR_OPERATIONS_ERROR;
1586 }
1587
1588 for (i=0; i<el->num_values; i++) {
1589 struct ldb_val *v = &el->values[i];
1590 NTSTATUS status;
1591 struct ldb_dn *dn;
1592 struct parsed_dn *p;
1593
1594 p = &(*pdn)[i];
1595
1596 p->dsdb_dn = dsdb_dn_parse(*pdn, ldb, v, ldap_oid);
1597 if (p->dsdb_dn == NULL) {
1598 return LDB_ERR_INVALID_DN_SYNTAX;
1599 }
1600
1601 dn = p->dsdb_dn->dn;
1602
1603 p->guid = talloc(*pdn, struct GUID);
1604 if (p->guid == NULL) {
1605 ldb_module_oom(module);
1606 return LDB_ERR_OPERATIONS_ERROR;
1607 }
1608
1609 status = dsdb_get_extended_dn_guid(dn, p->guid, "GUID");
1610 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1611 /* we got a DN without a GUID - go find the GUID */
1612 int ret = dsdb_module_guid_by_dn(module, dn, p->guid, parent);
1613 if (ret != LDB_SUCCESS) {
1614 ldb_asprintf_errstring(ldb, "Unable to find GUID for DN %s\n",
1615 ldb_dn_get_linearized(dn));
1616 if (ret == LDB_ERR_NO_SUCH_OBJECT &&
1617 LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_DELETE &&
1618 ldb_attr_cmp(el->name, "member") == 0) {
1619 return LDB_ERR_UNWILLING_TO_PERFORM;
1620 }
1621 return ret;
1622 }
1623 ret = dsdb_set_extended_dn_guid(dn, p->guid, "GUID");
1624 if (ret != LDB_SUCCESS) {
1625 return ret;
1626 }
1627 } else if (!NT_STATUS_IS_OK(status)) {
1628 return LDB_ERR_OPERATIONS_ERROR;
1629 }
1630
1631 /* keep a pointer to the original ldb_val */
1632 p->v = v;
1633 }
1634
1635 TYPESAFE_QSORT(*pdn, el->num_values, parsed_dn_compare);
1636
1637 return LDB_SUCCESS;
1638 }
1639
1640 /*
1641 build a new extended DN, including all meta data fields
1642
1643 RMD_FLAGS = DSDB_RMD_FLAG_* bits
1644 RMD_ADDTIME = originating_add_time
1645 RMD_INVOCID = originating_invocation_id
1646 RMD_CHANGETIME = originating_change_time
1647 RMD_ORIGINATING_USN = originating_usn
1648 RMD_LOCAL_USN = local_usn
1649 RMD_VERSION = version
1650 */
1651 static int replmd_build_la_val(TALLOC_CTX *mem_ctx, struct ldb_val *v, struct dsdb_dn *dsdb_dn,
1652 const struct GUID *invocation_id, uint64_t seq_num,
1653 uint64_t local_usn, NTTIME nttime, uint32_t version, bool deleted)
1654 {
1655 struct ldb_dn *dn = dsdb_dn->dn;
1656 const char *tstring, *usn_string, *flags_string;
1657 struct ldb_val tval;
1658 struct ldb_val iid;
1659 struct ldb_val usnv, local_usnv;
1660 struct ldb_val vers, flagsv;
1661 NTSTATUS status;
1662 int ret;
1663 const char *dnstring;
1664 char *vstring;
1665 uint32_t rmd_flags = deleted?DSDB_RMD_FLAG_DELETED:0;
1666
1667 tstring = talloc_asprintf(mem_ctx, "%llu", (unsigned long long)nttime);
1668 if (!tstring) {
1669 return LDB_ERR_OPERATIONS_ERROR;
1670 }
1671 tval = data_blob_string_const(tstring);
1672
1673 usn_string = talloc_asprintf(mem_ctx, "%llu", (unsigned long long)seq_num);
1674 if (!usn_string) {
1675 return LDB_ERR_OPERATIONS_ERROR;
1676 }
1677 usnv = data_blob_string_const(usn_string);
1678
1679 usn_string = talloc_asprintf(mem_ctx, "%llu", (unsigned long long)local_usn);
1680 if (!usn_string) {
1681 return LDB_ERR_OPERATIONS_ERROR;
1682 }
1683 local_usnv = data_blob_string_const(usn_string);
1684
1685 vstring = talloc_asprintf(mem_ctx, "%lu", (unsigned long)version);
1686 if (!vstring) {
1687 return LDB_ERR_OPERATIONS_ERROR;
1688 }
1689 vers = data_blob_string_const(vstring);
1690
1691 status = GUID_to_ndr_blob(invocation_id, dn, &iid);
1692 if (!NT_STATUS_IS_OK(status)) {
1693 return LDB_ERR_OPERATIONS_ERROR;
1694 }
1695
1696 flags_string = talloc_asprintf(mem_ctx, "%u", rmd_flags);
1697 if (!flags_string) {
1698 return LDB_ERR_OPERATIONS_ERROR;
1699 }
1700 flagsv = data_blob_string_const(flags_string);
1701
1702 ret = ldb_dn_set_extended_component(dn, "RMD_FLAGS", &flagsv);
1703 if (ret != LDB_SUCCESS) return ret;
1704 ret = ldb_dn_set_extended_component(dn, "RMD_ADDTIME", &tval);
1705 if (ret != LDB_SUCCESS) return ret;
1706 ret = ldb_dn_set_extended_component(dn, "RMD_INVOCID", &iid);
1707 if (ret != LDB_SUCCESS) return ret;
1708 ret = ldb_dn_set_extended_component(dn, "RMD_CHANGETIME", &tval);
1709 if (ret != LDB_SUCCESS) return ret;
1710 ret = ldb_dn_set_extended_component(dn, "RMD_LOCAL_USN", &local_usnv);
1711 if (ret != LDB_SUCCESS) return ret;
1712 ret = ldb_dn_set_extended_component(dn, "RMD_ORIGINATING_USN", &usnv);
1713 if (ret != LDB_SUCCESS) return ret;
1714 ret = ldb_dn_set_extended_component(dn, "RMD_VERSION", &vers);
1715 if (ret != LDB_SUCCESS) return ret;
1716
1717 dnstring = dsdb_dn_get_extended_linearized(mem_ctx, dsdb_dn, 1);
1718 if (dnstring == NULL) {
1719 return LDB_ERR_OPERATIONS_ERROR;
1720 }
1721 *v = data_blob_string_const(dnstring);
1722
1723 return LDB_SUCCESS;
1724 }
1725
1726 static int replmd_update_la_val(TALLOC_CTX *mem_ctx, struct ldb_val *v, struct dsdb_dn *dsdb_dn,
1727 struct dsdb_dn *old_dsdb_dn, const struct GUID *invocation_id,
1728 uint64_t seq_num, uint64_t local_usn, NTTIME nttime,
1729 uint32_t version, bool deleted);
1730
1731 /*
1732 check if any links need upgrading from w2k format
1733
1734 The parent_ctx is the ldb_message_element which contains the values array that dns[i].v points at, and which should be used for allocating any new value.
1735 */
1736 static int replmd_check_upgrade_links(struct parsed_dn *dns, uint32_t count, struct ldb_message_element *parent_ctx, const struct GUID *invocation_id)
1737 {
1738 uint32_t i;
1739 for (i=0; i<count; i++) {
1740 NTSTATUS status;
1741 uint32_t version;
1742 int ret;
1743
1744 status = dsdb_get_extended_dn_uint32(dns[i].dsdb_dn->dn, &version, "RMD_VERSION");
1745 if (!NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1746 continue;
1747 }
1748
1749 /* it's an old one that needs upgrading */
1750 ret = replmd_update_la_val(parent_ctx->values, dns[i].v, dns[i].dsdb_dn, dns[i].dsdb_dn, invocation_id,
1751 1, 1, 0, 0, false);
1752 if (ret != LDB_SUCCESS) {
1753 return ret;
1754 }
1755 }
1756 return LDB_SUCCESS;
1757 }
1758
1759 /*
1760 update an extended DN, including all meta data fields
1761
1762 see replmd_build_la_val for value names
1763 */
1764 static int replmd_update_la_val(TALLOC_CTX *mem_ctx, struct ldb_val *v, struct dsdb_dn *dsdb_dn,
1765 struct dsdb_dn *old_dsdb_dn, const struct GUID *invocation_id,
1766 uint64_t seq_num, uint64_t local_usn, NTTIME nttime,
1767 uint32_t version, bool deleted)
1768 {
1769 struct ldb_dn *dn = dsdb_dn->dn;
1770 const char *tstring, *usn_string, *flags_string;
1771 struct ldb_val tval;
1772 struct ldb_val iid;
1773 struct ldb_val usnv, local_usnv;
1774 struct ldb_val vers, flagsv;
1775 const struct ldb_val *old_addtime;
1776 uint32_t old_version;
1777 NTSTATUS status;
1778 int ret;
1779 const char *dnstring;
1780 char *vstring;
1781 uint32_t rmd_flags = deleted?DSDB_RMD_FLAG_DELETED:0;
1782
1783 tstring = talloc_asprintf(mem_ctx, "%llu", (unsigned long long)nttime);
1784 if (!tstring) {
1785 return LDB_ERR_OPERATIONS_ERROR;
1786 }
1787 tval = data_blob_string_const(tstring);
1788
1789 usn_string = talloc_asprintf(mem_ctx, "%llu", (unsigned long long)seq_num);
1790 if (!usn_string) {
1791 return LDB_ERR_OPERATIONS_ERROR;
1792 }
1793 usnv = data_blob_string_const(usn_string);
1794
1795 usn_string = talloc_asprintf(mem_ctx, "%llu", (unsigned long long)local_usn);
1796 if (!usn_string) {
1797 return LDB_ERR_OPERATIONS_ERROR;
1798 }
1799 local_usnv = data_blob_string_const(usn_string);
1800
1801 status = GUID_to_ndr_blob(invocation_id, dn, &iid);
1802 if (!NT_STATUS_IS_OK(status)) {
1803 return LDB_ERR_OPERATIONS_ERROR;
1804 }
1805
1806 flags_string = talloc_asprintf(mem_ctx, "%u", rmd_flags);
1807 if (!flags_string) {
1808 return LDB_ERR_OPERATIONS_ERROR;
1809 }
1810 flagsv = data_blob_string_const(flags_string);
1811
1812 ret = ldb_dn_set_extended_component(dn, "RMD_FLAGS", &flagsv);
1813 if (ret != LDB_SUCCESS) return ret;
1814
1815 /* get the ADDTIME from the original */
1816 old_addtime = ldb_dn_get_extended_component(old_dsdb_dn->dn, "RMD_ADDTIME");
1817 if (old_addtime == NULL) {
1818 old_addtime = &tval;
1819 }
1820 if (dsdb_dn != old_dsdb_dn ||
1821 ldb_dn_get_extended_component(dn, "RMD_ADDTIME") == NULL) {
1822 ret = ldb_dn_set_extended_component(dn, "RMD_ADDTIME", old_addtime);
1823 if (ret != LDB_SUCCESS) return ret;
1824 }
1825
1826 /* use our invocation id */
1827 ret = ldb_dn_set_extended_component(dn, "RMD_INVOCID", &iid);
1828 if (ret != LDB_SUCCESS) return ret;
1829
1830 /* changetime is the current time */
1831 ret = ldb_dn_set_extended_component(dn, "RMD_CHANGETIME", &tval);
1832 if (ret != LDB_SUCCESS) return ret;
1833
1834 /* update the USN */
1835 ret = ldb_dn_set_extended_component(dn, "RMD_ORIGINATING_USN", &usnv);
1836 if (ret != LDB_SUCCESS) return ret;
1837
1838 ret = ldb_dn_set_extended_component(dn, "RMD_LOCAL_USN", &local_usnv);
1839 if (ret != LDB_SUCCESS) return ret;
1840
1841 /* increase the version by 1 */
1842 status = dsdb_get_extended_dn_uint32(old_dsdb_dn->dn, &old_version, "RMD_VERSION");
1843 if (NT_STATUS_IS_OK(status) && old_version >= version) {
1844 version = old_version+1;
1845 }
1846 vstring = talloc_asprintf(dn, "%lu", (unsigned long)version);
1847 vers = data_blob_string_const(vstring);
1848 ret = ldb_dn_set_extended_component(dn, "RMD_VERSION", &vers);
1849 if (ret != LDB_SUCCESS) return ret;
1850
1851 dnstring = dsdb_dn_get_extended_linearized(mem_ctx, dsdb_dn, 1);
1852 if (dnstring == NULL) {
1853 return LDB_ERR_OPERATIONS_ERROR;
1854 }
1855 *v = data_blob_string_const(dnstring);
1856
1857 return LDB_SUCCESS;
1858 }
1859
1860 /*
1861 handle adding a linked attribute
1862 */
1863 static int replmd_modify_la_add(struct ldb_module *module,
1864 const struct dsdb_schema *schema,
1865 struct ldb_message *msg,
1866 struct ldb_message_element *el,
1867 struct ldb_message_element *old_el,
1868 const struct dsdb_attribute *schema_attr,
1869 uint64_t seq_num,
1870 time_t t,
1871 struct GUID *msg_guid,
1872 struct ldb_request *parent)
1873 {
1874 unsigned int i;
1875 struct parsed_dn *dns, *old_dns;
1876 TALLOC_CTX *tmp_ctx = talloc_new(msg);
1877 int ret;
1878 struct ldb_val *new_values = NULL;
1879 unsigned int num_new_values = 0;
1880 unsigned old_num_values = old_el?old_el->num_values:0;
1881 const struct GUID *invocation_id;
1882 struct ldb_context *ldb = ldb_module_get_ctx(module);
1883 NTTIME now;
1884
1885 unix_to_nt_time(&now, t);
1886
1887 ret = get_parsed_dns(module, tmp_ctx, el, &dns, schema_attr->syntax->ldap_oid, parent);
1888 if (ret != LDB_SUCCESS) {
1889 talloc_free(tmp_ctx);
1890 return ret;
1891 }
1892
1893 ret = get_parsed_dns(module, tmp_ctx, old_el, &old_dns, schema_attr->syntax->ldap_oid, parent);
1894 if (ret != LDB_SUCCESS) {
1895 talloc_free(tmp_ctx);
1896 return ret;
1897 }
1898
1899 invocation_id = samdb_ntds_invocation_id(ldb);
1900 if (!invocation_id) {
1901 talloc_free(tmp_ctx);
1902 return LDB_ERR_OPERATIONS_ERROR;
1903 }
1904
1905 ret = replmd_check_upgrade_links(old_dns, old_num_values, old_el, invocation_id);
1906 if (ret != LDB_SUCCESS) {
1907 talloc_free(tmp_ctx);
1908 return ret;
1909 }
1910
1911 /* for each new value, see if it exists already with the same GUID */
1912 for (i=0; i<el->num_values; i++) {
1913 struct parsed_dn *p = parsed_dn_find(old_dns, old_num_values, dns[i].guid, NULL);
1914 if (p == NULL) {
1915 /* this is a new linked attribute value */
1916 new_values = talloc_realloc(tmp_ctx, new_values, struct ldb_val, num_new_values+1);
1917 if (new_values == NULL) {
1918 ldb_module_oom(module);
1919 talloc_free(tmp_ctx);
1920 return LDB_ERR_OPERATIONS_ERROR;
1921 }
1922 ret = replmd_build_la_val(new_values, &new_values[num_new_values], dns[i].dsdb_dn,
1923 invocation_id, seq_num, seq_num, now, 0, false);
1924 if (ret != LDB_SUCCESS) {
1925 talloc_free(tmp_ctx);
1926 return ret;
1927 }
1928 num_new_values++;
1929 } else {
1930 /* this is only allowed if the GUID was
1931 previously deleted. */
1932 uint32_t rmd_flags = dsdb_dn_rmd_flags(p->dsdb_dn->dn);
1933
1934 if (!(rmd_flags & DSDB_RMD_FLAG_DELETED)) {
1935 ldb_asprintf_errstring(ldb, "Attribute %s already exists for target GUID %s",
1936 el->name, GUID_string(tmp_ctx, p->guid));
1937 talloc_free(tmp_ctx);
1938 /* error codes for 'member' need to be
1939 special cased */
1940 if (ldb_attr_cmp(el->name, "member") == 0) {
1941 return LDB_ERR_ENTRY_ALREADY_EXISTS;
1942 } else {
1943 return LDB_ERR_ATTRIBUTE_OR_VALUE_EXISTS;
1944 }
1945 }
1946 ret = replmd_update_la_val(old_el->values, p->v, dns[i].dsdb_dn, p->dsdb_dn,
1947 invocation_id, seq_num, seq_num, now, 0, false);
1948 if (ret != LDB_SUCCESS) {
1949 talloc_free(tmp_ctx);
1950 return ret;
1951 }
1952 }
1953
1954 ret = replmd_add_backlink(module, schema, msg_guid, dns[i].guid, true, schema_attr, true);
1955 if (ret != LDB_SUCCESS) {
1956 talloc_free(tmp_ctx);
1957 return ret;
1958 }
1959 }
1960
1961 /* add the new ones on to the end of the old values, constructing a new el->values */
1962 el->values = talloc_realloc(msg->elements, old_el?old_el->values:NULL,
1963 struct ldb_val,
1964 old_num_values+num_new_values);
1965 if (el->values == NULL) {
1966 ldb_module_oom(module);
1967 return LDB_ERR_OPERATIONS_ERROR;
1968 }
1969
1970 memcpy(&el->values[old_num_values], new_values, num_new_values*sizeof(struct ldb_val));
1971 el->num_values = old_num_values + num_new_values;
1972
1973 talloc_steal(msg->elements, el->values);
1974 talloc_steal(el->values, new_values);
1975
1976 talloc_free(tmp_ctx);
1977
1978 /* we now tell the backend to replace all existing values
1979 with the one we have constructed */
1980 el->flags = LDB_FLAG_MOD_REPLACE;
1981
1982 return LDB_SUCCESS;
1983 }
1984
1985
1986 /*
1987 handle deleting all active linked attributes
1988 */
1989 static int replmd_modify_la_delete(struct ldb_module *module,
1990 const struct dsdb_schema *schema,
1991 struct ldb_message *msg,
1992 struct ldb_message_element *el,
1993 struct ldb_message_element *old_el,
1994 const struct dsdb_attribute *schema_attr,
1995 uint64_t seq_num,
1996 time_t t,
1997 struct GUID *msg_guid,
1998 struct ldb_request *parent)
1999 {
2000 unsigned int i;
2001 struct parsed_dn *dns, *old_dns;
2002 TALLOC_CTX *tmp_ctx = talloc_new(msg);
2003 int ret;
2004 const struct GUID *invocation_id;
2005 struct ldb_context *ldb = ldb_module_get_ctx(module);
2006 NTTIME now;
2007
2008 unix_to_nt_time(&now, t);
2009
2010 /* check if there is nothing to delete */
2011 if ((!old_el || old_el->num_values == 0) &&
2012 el->num_values == 0) {
2013 return LDB_SUCCESS;
2014 }
2015
2016 if (!old_el || old_el->num_values == 0) {
2017 return LDB_ERR_NO_SUCH_ATTRIBUTE;
2018 }
2019
2020 ret = get_parsed_dns(module, tmp_ctx, el, &dns, schema_attr->syntax->ldap_oid, parent);
2021 if (ret != LDB_SUCCESS) {
2022 talloc_free(tmp_ctx);
2023 return ret;
2024 }
2025
2026 ret = get_parsed_dns(module, tmp_ctx, old_el, &old_dns, schema_attr->syntax->ldap_oid, parent);
2027 if (ret != LDB_SUCCESS) {
2028 talloc_free(tmp_ctx);
2029 return ret;
2030 }
2031
2032 invocation_id = samdb_ntds_invocation_id(ldb);
2033 if (!invocation_id) {
2034 return LDB_ERR_OPERATIONS_ERROR;
2035 }
2036
2037 ret = replmd_check_upgrade_links(old_dns, old_el->num_values, old_el, invocation_id);
2038 if (ret != LDB_SUCCESS) {
2039 talloc_free(tmp_ctx);
2040 return ret;
2041 }
2042
2043 el->values = NULL;
2044
2045 /* see if we are being asked to delete any links that
2046 don't exist or are already deleted */
2047 for (i=0; i<el->num_values; i++) {
2048 struct parsed_dn *p = &dns[i];
2049 struct parsed_dn *p2;
2050 uint32_t rmd_flags;
2051
2052 p2 = parsed_dn_find(old_dns, old_el->num_values, p->guid, NULL);
2053 if (!p2) {
2054 ldb_asprintf_errstring(ldb, "Attribute %s doesn't exist for target GUID %s",
2055 el->name, GUID_string(tmp_ctx, p->guid));
2056 if (ldb_attr_cmp(el->name, "member") == 0) {
2057 return LDB_ERR_UNWILLING_TO_PERFORM;
2058 } else {
2059 return LDB_ERR_NO_SUCH_ATTRIBUTE;
2060 }
2061 }
2062 rmd_flags = dsdb_dn_rmd_flags(p2->dsdb_dn->dn);
2063 if (rmd_flags & DSDB_RMD_FLAG_DELETED) {
2064 ldb_asprintf_errstring(ldb, "Attribute %s already deleted for target GUID %s",
2065 el->name, GUID_string(tmp_ctx, p->guid));
2066 if (ldb_attr_cmp(el->name, "member") == 0) {
2067 return LDB_ERR_UNWILLING_TO_PERFORM;
2068 } else {
2069 return LDB_ERR_NO_SUCH_ATTRIBUTE;
2070 }
2071 }
2072 }
2073
2074 /* for each new value, see if it exists already with the same GUID
2075 if it is not already deleted and matches the delete list then delete it
2076 */
2077 for (i=0; i<old_el->num_values; i++) {
2078 struct parsed_dn *p = &old_dns[i];
2079 uint32_t rmd_flags;
2080
2081 if (el->num_values && parsed_dn_find(dns, el->num_values, p->guid, NULL) == NULL) {
2082 continue;
2083 }
2084
2085 rmd_flags = dsdb_dn_rmd_flags(p->dsdb_dn->dn);
2086 if (rmd_flags & DSDB_RMD_FLAG_DELETED) continue;
2087
2088 ret = replmd_update_la_val(old_el->values, p->v, p->dsdb_dn, p->dsdb_dn,
2089 invocation_id, seq_num, seq_num, now, 0, true);
2090 if (ret != LDB_SUCCESS) {
2091 talloc_free(tmp_ctx);
2092 return ret;
2093 }
2094
2095 ret = replmd_add_backlink(module, schema, msg_guid, old_dns[i].guid, false, schema_attr, true);
2096 if (ret != LDB_SUCCESS) {
2097 talloc_free(tmp_ctx);
2098 return ret;
2099 }
2100 }
2101
2102 el->values = talloc_steal(msg->elements, old_el->values);
2103 el->num_values = old_el->num_values;
2104
2105 talloc_free(tmp_ctx);
2106
2107 /* we now tell the backend to replace all existing values
2108 with the one we have constructed */
2109 el->flags = LDB_FLAG_MOD_REPLACE;
2110
2111 return LDB_SUCCESS;
2112 }
2113
2114 /*
2115 handle replacing a linked attribute
2116 */
2117 static int replmd_modify_la_replace(struct ldb_module *module,
2118 const struct dsdb_schema *schema,
2119 struct ldb_message *msg,
2120 struct ldb_message_element *el,
2121 struct ldb_message_element *old_el,
2122 const struct dsdb_attribute *schema_attr,
2123 uint64_t seq_num,
2124 time_t t,
2125 struct GUID *msg_guid,
2126 struct ldb_request *parent)
2127 {
2128 unsigned int i;
2129 struct parsed_dn *dns, *old_dns;
2130 TALLOC_CTX *tmp_ctx = talloc_new(msg);
2131 int ret;
2132 const struct GUID *invocation_id;
2133 struct ldb_context *ldb = ldb_module_get_ctx(module);
2134 struct ldb_val *new_values = NULL;
2135 unsigned int num_new_values = 0;
2136 unsigned int old_num_values = old_el?old_el->num_values:0;
2137 NTTIME now;
2138
2139 unix_to_nt_time(&now, t);
2140
2141 /* check if there is nothing to replace */
2142 if ((!old_el || old_el->num_values == 0) &&
2143 el->num_values == 0) {
2144 return LDB_SUCCESS;
2145 }
2146
2147 ret = get_parsed_dns(module, tmp_ctx, el, &dns, schema_attr->syntax->ldap_oid, parent);
2148 if (ret != LDB_SUCCESS) {
2149 talloc_free(tmp_ctx);
2150 return ret;
2151 }
2152
2153 ret = get_parsed_dns(module, tmp_ctx, old_el, &old_dns, schema_attr->syntax->ldap_oid, parent);
2154 if (ret != LDB_SUCCESS) {
2155 talloc_free(tmp_ctx);
2156 return ret;
2157 }
2158
2159 invocation_id = samdb_ntds_invocation_id(ldb);
2160 if (!invocation_id) {
2161 return LDB_ERR_OPERATIONS_ERROR;
2162 }
2163
2164 ret = replmd_check_upgrade_links(old_dns, old_num_values, old_el, invocation_id);
2165 if (ret != LDB_SUCCESS) {
2166 talloc_free(tmp_ctx);
2167 return ret;
2168 }
2169
2170 /* mark all the old ones as deleted */
2171 for (i=0; i<old_num_values; i++) {
2172 struct parsed_dn *old_p = &old_dns[i];
2173 struct parsed_dn *p;
2174 uint32_t rmd_flags = dsdb_dn_rmd_flags(old_p->dsdb_dn->dn);
2175
2176 if (rmd_flags & DSDB_RMD_FLAG_DELETED) continue;
2177
2178 ret = replmd_add_backlink(module, schema, msg_guid, old_dns[i].guid, false, schema_attr, false);
2179 if (ret != LDB_SUCCESS) {
2180 talloc_free(tmp_ctx);
2181 return ret;
2182 }
2183
2184 p = parsed_dn_find(dns, el->num_values, old_p->guid, NULL);
2185 if (p) {
2186 /* we don't delete it if we are re-adding it */
2187 continue;
2188 }
2189
2190 ret = replmd_update_la_val(old_el->values, old_p->v, old_p->dsdb_dn, old_p->dsdb_dn,
2191 invocation_id, seq_num, seq_num, now, 0, true);
2192 if (ret != LDB_SUCCESS) {
2193 talloc_free(tmp_ctx);
2194 return ret;
2195 }
2196 }
2197
2198 /* for each new value, either update its meta-data, or add it
2199 * to old_el
2200 */
2201 for (i=0; i<el->num_values; i++) {
2202 struct parsed_dn *p = &dns[i], *old_p;
2203
2204 if (old_dns &&
2205 (old_p = parsed_dn_find(old_dns,
2206 old_num_values, p->guid, NULL)) != NULL) {
2207 /* update in place */
2208 ret = replmd_update_la_val(old_el->values, old_p->v, p->dsdb_dn,
2209 old_p->dsdb_dn, invocation_id,
2210 seq_num, seq_num, now, 0, false);
2211 if (ret != LDB_SUCCESS) {
2212 talloc_free(tmp_ctx);
2213 return ret;
2214 }
2215 } else {
2216 /* add a new one */
2217 new_values = talloc_realloc(tmp_ctx, new_values, struct ldb_val,
2218 num_new_values+1);
2219 if (new_values == NULL) {
2220 ldb_module_oom(module);
2221 talloc_free(tmp_ctx);
2222 return LDB_ERR_OPERATIONS_ERROR;
2223 }
2224 ret = replmd_build_la_val(new_values, &new_values[num_new_values], dns[i].dsdb_dn,
2225 invocation_id, seq_num, seq_num, now, 0, false);
2226 if (ret != LDB_SUCCESS) {
2227 talloc_free(tmp_ctx);
2228 return ret;
2229 }
2230 num_new_values++;
2231 }
2232
2233 ret = replmd_add_backlink(module, schema, msg_guid, dns[i].guid, true, schema_attr, false);
2234 if (ret != LDB_SUCCESS) {
2235 talloc_free(tmp_ctx);
2236 return ret;
2237 }
2238 }
2239
2240 /* add the new values to the end of old_el */
2241 if (num_new_values != 0) {
2242 el->values = talloc_realloc(msg->elements, old_el?old_el->values:NULL,
2243 struct ldb_val, old_num_values+num_new_values);
2244 if (el->values == NULL) {
2245 ldb_module_oom(module);
2246 return LDB_ERR_OPERATIONS_ERROR;
2247 }
2248 memcpy(&el->values[old_num_values], &new_values[0],
2249 sizeof(struct ldb_val)*num_new_values);
2250 el->num_values = old_num_values + num_new_values;
2251 talloc_steal(msg->elements, new_values);
2252 } else {
2253 el->values = old_el->values;
2254 el->num_values = old_el->num_values;
2255 talloc_steal(msg->elements, el->values);
2256 }
2257
2258 talloc_free(tmp_ctx);
2259
2260 /* we now tell the backend to replace all existing values
2261 with the one we have constructed */
2262 el->flags = LDB_FLAG_MOD_REPLACE;
2263
2264 return LDB_SUCCESS;
2265 }
2266
2267
2268 /*
2269 handle linked attributes in modify requests
2270 */
2271 static int replmd_modify_handle_linked_attribs(struct ldb_module *module,
2272 struct ldb_message *msg,
2273 uint64_t seq_num, time_t t,
2274 struct ldb_request *parent)
2275 {
2276 struct ldb_result *res;
2277 unsigned int i;
2278 int ret;
2279 struct ldb_context *ldb = ldb_module_get_ctx(module);
2280 struct ldb_message *old_msg;
2281
2282 const struct dsdb_schema *schema;
2283 struct GUID old_guid;
2284
2285 if (seq_num == 0) {
2286 /* there the replmd_update_rpmd code has already
2287 * checked and saw that there are no linked
2288 * attributes */
2289 return LDB_SUCCESS;
2290 }
2291
2292 if (dsdb_functional_level(ldb) == DS_DOMAIN_FUNCTION_2000) {
2293 /* don't do anything special for linked attributes */
2294 return LDB_SUCCESS;
2295 }
2296
2297 ret = dsdb_module_search_dn(module, msg, &res, msg->dn, NULL,
2298 DSDB_FLAG_NEXT_MODULE |
2299 DSDB_SEARCH_SHOW_RECYCLED |
2300 DSDB_SEARCH_REVEAL_INTERNALS |
2301 DSDB_SEARCH_SHOW_DN_IN_STORAGE_FORMAT,
2302 parent);
2303 if (ret != LDB_SUCCESS) {
2304 return ret;
2305 }
2306 schema = dsdb_get_schema(ldb, res);
2307 if (!schema) {
2308 return LDB_ERR_OPERATIONS_ERROR;
2309 }
2310
2311 old_msg = res->msgs[0];
2312
2313 old_guid = samdb_result_guid(old_msg, "objectGUID");
2314
2315 for (i=0; i<msg->num_elements; i++) {
2316 struct ldb_message_element *el = &msg->elements[i];
2317 struct ldb_message_element *old_el, *new_el;
2318 const struct dsdb_attribute *schema_attr
2319 = dsdb_attribute_by_lDAPDisplayName(schema, el->name);
2320 if (!schema_attr) {
2321 ldb_asprintf_errstring(ldb,
2322 "%s: attribute %s is not a valid attribute in schema",
2323 __FUNCTION__, el->name);
2324 return LDB_ERR_OBJECT_CLASS_VIOLATION;
2325 }
2326 if (schema_attr->linkID == 0) {
2327 continue;
2328 }
2329 if ((schema_attr->linkID & 1) == 1) {
2330 if (parent && ldb_request_get_control(parent, DSDB_CONTROL_DBCHECK)) {
2331 continue;
2332 }
2333 /* Odd is for the target. Illegal to modify */
2334 ldb_asprintf_errstring(ldb,
2335 "attribute %s must not be modified directly, it is a linked attribute", el->name);
2336 return LDB_ERR_UNWILLING_TO_PERFORM;
2337 }
2338 old_el = ldb_msg_find_element(old_msg, el->name);
2339 switch (el->flags & LDB_FLAG_MOD_MASK) {
2340 case LDB_FLAG_MOD_REPLACE:
2341 ret = replmd_modify_la_replace(module, schema, msg, el, old_el, schema_attr, seq_num, t, &old_guid, parent);
2342 break;
2343 case LDB_FLAG_MOD_DELETE:
2344 ret = replmd_modify_la_delete(module, schema, msg, el, old_el, schema_attr, seq_num, t, &old_guid, parent);
2345 break;
2346 case LDB_FLAG_MOD_ADD:
2347 ret = replmd_modify_la_add(module, schema, msg, el, old_el, schema_attr, seq_num, t, &old_guid, parent);
2348 break;
2349 default:
2350 ldb_asprintf_errstring(ldb,
2351 "invalid flags 0x%x for %s linked attribute",
2352 el->flags, el->name);
2353 return LDB_ERR_UNWILLING_TO_PERFORM;
2354 }
2355 if (dsdb_check_single_valued_link(schema_attr, el) != LDB_SUCCESS) {
2356 ldb_asprintf_errstring(ldb,
2357 "Attribute %s is single valued but more than one value has been supplied",
2358 el->name);
2359 return LDB_ERR_ATTRIBUTE_OR_VALUE_EXISTS;
2360 } else {
2361 el->flags |= LDB_FLAG_INTERNAL_DISABLE_SINGLE_VALUE_CHECK;
2362 }
2363
2364
2365
2366 if (ret != LDB_SUCCESS) {
2367 return ret;
2368 }
2369 if (old_el) {
2370 ldb_msg_remove_attr(old_msg, el->name);
2371 }
2372 ldb_msg_add_empty(old_msg, el->name, 0, &new_el);
2373 new_el->num_values = el->num_values;
2374 new_el->values = talloc_steal(msg->elements, el->values);
2375
2376 /* TODO: this relises a bit too heavily on the exact
2377 behaviour of ldb_msg_find_element and
2378 ldb_msg_remove_element */
2379 old_el = ldb_msg_find_element(msg, el->name);
2380 if (old_el != el) {
2381 ldb_msg_remove_element(msg, old_el);
2382 i--;
2383 }
2384 }
2385
2386 talloc_free(res);
2387 return ret;
2388 }
2389
2390
2391
2392 static int replmd_modify(struct ldb_module *module, struct ldb_request *req)
2393 {
2394 struct samldb_msds_intid_persistant *msds_intid_struct;
2395 struct ldb_context *ldb;
2396 struct replmd_replicated_request *ac;
2397 struct ldb_request *down_req;
2398 struct ldb_message *msg;
2399 time_t t = time(NULL);
2400 int ret;
2401 bool is_urgent = false, rodc = false;
2402 unsigned int functional_level;
2403 const DATA_BLOB *guid_blob;
2404 struct ldb_control *sd_propagation_control;
2405
2406 /* do not manipulate our control entries */
2407 if (ldb_dn_is_special(req->op.mod.message->dn)) {
2408 return ldb_next_request(module, req);
2409 }
2410
2411 sd_propagation_control = ldb_request_get_control(req,
2412 DSDB_CONTROL_SEC_DESC_PROPAGATION_OID);
2413 if (sd_propagation_control != NULL) {
2414 if (req->op.mod.message->num_elements != 1) {
2415 return ldb_module_operr(module);
2416 }
2417 ret = strcmp(req->op.mod.message->elements[0].name,
2418 "nTSecurityDescriptor");
2419 if (ret != 0) {
2420 return ldb_module_operr(module);
2421 }
2422
2423 return ldb_next_request(module, req);
2424 }
2425
2426 ldb = ldb_module_get_ctx(module);
2427
2428 ldb_debug(ldb, LDB_DEBUG_TRACE, "replmd_modify\n");
2429
2430 guid_blob = ldb_msg_find_ldb_val(req->op.mod.message, "objectGUID");
2431 if ( guid_blob != NULL ) {
2432 ldb_set_errstring(ldb,
2433 "replmd_modify: it's not allowed to change the objectGUID!");
2434 return LDB_ERR_CONSTRAINT_VIOLATION;
2435 }
2436
2437 ac = replmd_ctx_init(module, req);
2438 if (ac == NULL) {
2439 return ldb_module_oom(module);
2440 }
2441
2442 functional_level = dsdb_functional_level(ldb);
2443
2444 /* we have to copy the message as the caller might have it as a const */
2445 msg = ldb_msg_copy_shallow(ac, req->op.mod.message);
2446 if (msg == NULL) {
2447 ldb_oom(ldb);
2448 talloc_free(ac);
2449 return LDB_ERR_OPERATIONS_ERROR;
2450 }
2451
2452 ldb_msg_remove_attr(msg, "whenChanged");
2453 ldb_msg_remove_attr(msg, "uSNChanged");
2454
2455 ret = replmd_update_rpmd(module, ac->schema, req, NULL,
2456 msg, &ac->seq_num, t, &is_urgent, &rodc);
2457 if (rodc && (ret == LDB_ERR_REFERRAL)) {
2458 struct loadparm_context *lp_ctx;
2459 char *referral;
2460
2461 lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
2462 struct loadparm_context);
2463
2464 referral = talloc_asprintf(req,
2465 "ldap://%s/%s",
2466 lpcfg_dnsdomain(lp_ctx),
2467 ldb_dn_get_linearized(msg->dn));
2468 ret = ldb_module_send_referral(req, referral);
2469 talloc_free(ac);
2470 return ret;
2471 }
2472
2473 if (ret != LDB_SUCCESS) {
2474 talloc_free(ac);
2475 return ret;
2476 }
2477
2478 ret = replmd_modify_handle_linked_attribs(module, msg, ac->seq_num, t, req);
2479 if (ret != LDB_SUCCESS) {
2480 talloc_free(ac);
2481 return ret;
2482 }
2483
2484 /* TODO:
2485 * - replace the old object with the newly constructed one
2486 */
2487
2488 ac->is_urgent = is_urgent;
2489
2490 ret = ldb_build_mod_req(&down_req, ldb, ac,
2491 msg,
2492 req->controls,
2493 ac, replmd_op_callback,
2494 req);
2495 LDB_REQ_SET_LOCATION(down_req);
2496 if (ret != LDB_SUCCESS) {
2497 talloc_free(ac);
2498 return ret;
2499 }
2500
2501 /* current partition control is needed by "replmd_op_callback" */
2502 if (ldb_request_get_control(req, DSDB_CONTROL_CURRENT_PARTITION_OID) == NULL) {
2503 ret = ldb_request_add_control(down_req,
2504 DSDB_CONTROL_CURRENT_PARTITION_OID,
2505 false, NULL);
2506 if (ret != LDB_SUCCESS) {
2507 talloc_free(ac);
2508 return ret;
2509 }
2510 }
2511
2512 /* If we are in functional level 2000, then
2513 * replmd_modify_handle_linked_attribs will have done
2514 * nothing */
2515 if (functional_level == DS_DOMAIN_FUNCTION_2000) {
2516 ret = ldb_request_add_control(down_req, DSDB_CONTROL_APPLY_LINKS, false, NULL);
2517 if (ret != LDB_SUCCESS) {
2518 talloc_free(ac);
2519 return ret;
2520 }
2521 }
2522
2523 talloc_steal(down_req, msg);
2524
2525 /* we only change whenChanged and uSNChanged if the seq_num
2526 has changed */
2527 if (ac->seq_num != 0) {
2528 ret = add_time_element(msg, "whenChanged", t);
2529 if (ret != LDB_SUCCESS) {
2530 talloc_free(ac);
2531 ldb_operr(ldb);
2532 return ret;
2533 }
2534
2535 ret = add_uint64_element(ldb, msg, "uSNChanged", ac->seq_num);
2536 if (ret != LDB_SUCCESS) {
2537 talloc_free(ac);
2538 ldb_operr(ldb);
2539 return ret;
2540 }
2541 }
2542
2543 if (!ldb_dn_compare_base(ac->schema->base_dn, msg->dn)) {
2544 /* Update the usn in the SAMLDB_MSDS_INTID_OPAQUE opaque */
2545 msds_intid_struct = (struct samldb_msds_intid_persistant *) ldb_get_opaque(ldb, SAMLDB_MSDS_INTID_OPAQUE);
2546 if (msds_intid_struct) {
2547 msds_intid_struct->usn = ac->seq_num;
2548 }
2549 }
2550
2551 /* go on with the call chain */
2552 return ldb_next_request(module, down_req);
2553 }
2554
2555 static int replmd_rename_callback(struct ldb_request *req, struct ldb_reply *ares);
2556
2557 /*
2558 handle a rename request
2559
2560 On a rename we need to do an extra ldb_modify which sets the
2561 whenChanged and uSNChanged attributes. We do this in a callback after the success.
2562 */
2563 static int replmd_rename(struct ldb_module *module, struct ldb_request *req)
2564 {
2565 struct ldb_context *ldb;
2566 struct replmd_replicated_request *ac;
2567 int ret;
2568 struct ldb_request *down_req;
2569
2570 /* do not manipulate our control entries */
2571 if (ldb_dn_is_special(req->op.mod.message->dn)) {
2572 return ldb_next_request(module, req);
2573 }
2574
2575 ldb = ldb_module_get_ctx(module);
2576
2577 ldb_debug(ldb, LDB_DEBUG_TRACE, "replmd_rename\n");
2578
2579 ac = replmd_ctx_init(module, req);
2580 if (ac == NULL) {
2581 return ldb_module_oom(module);
2582 }
2583
2584 ret = ldb_build_rename_req(&down_req, ldb, ac,
2585 ac->req->op.rename.olddn,
2586 ac->req->op.rename.newdn,
2587 ac->req->controls,
2588 ac, replmd_rename_callback,
2589 ac->req);
2590 LDB_REQ_SET_LOCATION(down_req);
2591 if (ret != LDB_SUCCESS) {
2592 talloc_free(ac);
2593 return ret;
2594 }
2595
2596 /* go on with the call chain */
2597 return ldb_next_request(module, down_req);
2598 }
2599
2600 /* After the rename is compleated, update the whenchanged etc */
2601 static int replmd_rename_callback(struct ldb_request *req, struct ldb_reply *ares)
2602 {
2603 struct ldb_context *ldb;
2604 struct replmd_replicated_request *ac;
2605 struct ldb_request *down_req;
2606 struct ldb_message *msg;
2607 const struct dsdb_attribute *rdn_attr;
2608 const char *rdn_name;
2609 const struct ldb_val *rdn_val;
2610 const char *attrs[5] = { NULL, };
2611 time_t t = time(NULL);
2612 int ret;
2613 bool is_urgent = false, rodc = false;
2614
2615 ac = talloc_get_type(req->context, struct replmd_replicated_request);
2616 ldb = ldb_module_get_ctx(ac->module);
2617
2618 if (ares->error != LDB_SUCCESS) {
2619 return ldb_module_done(ac->req, ares->controls,
2620 ares->response, ares->error);
2621 }
2622
2623 if (ares->type != LDB_REPLY_DONE) {
2624 ldb_set_errstring(ldb,
2625 "invalid ldb_reply_type in callback");
2626 talloc_free(ares);
2627 return ldb_module_done(ac->req, NULL, NULL,
2628 LDB_ERR_OPERATIONS_ERROR);
2629 }
2630
2631 /* TODO:
2632 * - replace the old object with the newly constructed one
2633 */
2634
2635 msg = ldb_msg_new(ac);
2636 if (msg == NULL) {
2637 ldb_oom(ldb);
2638 return LDB_ERR_OPERATIONS_ERROR;
2639 }
2640
2641 msg->dn = ac->req->op.rename.newdn;
2642
2643 rdn_name = ldb_dn_get_rdn_name(msg->dn);
2644 if (rdn_name == NULL) {
2645 talloc_free(ares);
2646 return ldb_module_done(ac->req, NULL, NULL,
2647 ldb_operr(ldb));
2648 }
2649
2650 /* normalize the rdn attribute name */
2651 rdn_attr = dsdb_attribute_by_lDAPDisplayName(ac->schema, rdn_name);
2652 if (rdn_attr == NULL) {
2653 talloc_free(ares);
2654 return ldb_module_done(ac->req, NULL, NULL,
2655 ldb_operr(ldb));
2656 }
2657 rdn_name = rdn_attr->lDAPDisplayName;
2658
2659 rdn_val = ldb_dn_get_rdn_val(msg->dn);
2660 if (rdn_val == NULL) {
2661 talloc_free(ares);
2662 return ldb_module_done(ac->req, NULL, NULL,
2663 ldb_operr(ldb));
2664 }
2665
2666 if (ldb_msg_add_empty(msg, rdn_name, LDB_FLAG_MOD_REPLACE, NULL) != 0) {
2667 talloc_free(ares);
2668 return ldb_module_done(ac->req, NULL, NULL,
2669 ldb_oom(ldb));
2670 }
2671 if (ldb_msg_add_value(msg, rdn_name, rdn_val, NULL) != 0) {
2672 talloc_free(ares);
2673 return ldb_module_done(ac->req, NULL, NULL,
2674 ldb_oom(ldb));
2675 }
2676 if (ldb_msg_add_empty(msg, "name", LDB_FLAG_MOD_REPLACE, NULL) != 0) {
2677 talloc_free(ares);
2678 return ldb_module_done(ac->req, NULL, NULL,
2679 ldb_oom(ldb));
2680 }
2681 if (ldb_msg_add_value(msg, "name", rdn_val, NULL) != 0) {
2682 talloc_free(ares);
2683 return ldb_module_done(ac->req, NULL, NULL,
2684 ldb_oom(ldb));
2685 }
2686
2687 /*
2688 * here we let replmd_update_rpmd() only search for
2689 * the existing "replPropertyMetaData" and rdn_name attributes.
2690 *
2691 * We do not want the existing "name" attribute as
2692 * the "name" attribute needs to get the version
2693 * updated on rename even if the rdn value hasn't changed.
2694 *
2695 * This is the diff of the meta data, for a moved user
2696 * on a w2k8r2 server:
2697 *
2698 * # record 1
2699 * -dn: CN=sdf df,CN=Users,DC=bla,DC=base
2700 * +dn: CN=sdf df,OU=TestOU,DC=bla,DC=base
2701 * replPropertyMetaData: NDR: struct replPropertyMetaDataBlob
2702 * version : 0x00000001 (1)
2703 * reserved : 0x00000000 (0)
2704 * @@ -66,11 +66,11 @@ replPropertyMetaData: NDR: struct re
2705 * local_usn : 0x00000000000037a5 (14245)
2706 * array: struct replPropertyMetaData1
2707 * attid : DRSUAPI_ATTID_name (0x90001)
2708 * - version : 0x00000001 (1)
2709 * - originating_change_time : Wed Feb 9 17:20:49 2011 CET
2710 * + version : 0x00000002 (2)
2711 * + originating_change_time : Wed Apr 6 15:21:01 2011 CEST
2712 * originating_invocation_id: 0d36ca05-5507-4e62-aca3-354bab0d39e1
2713 * - originating_usn : 0x00000000000037a5 (14245)
2714 * - local_usn : 0x00000000000037a5 (14245)
2715 * + originating_usn : 0x0000000000003834 (14388)
2716 * + local_usn : 0x0000000000003834 (14388)
2717 * array: struct replPropertyMetaData1
2718 * attid : DRSUAPI_ATTID_userAccountControl (0x90008)
2719 * version : 0x00000004 (4)
2720 */
2721 attrs[0] = "replPropertyMetaData";
2722 attrs[1] = "objectClass";
2723 attrs[2] = "instanceType";
2724 attrs[3] = rdn_name;
2725 attrs[4] = NULL;
2726
2727 ret = replmd_update_rpmd(ac->module, ac->schema, req, attrs,
2728 msg, &ac->seq_num, t, &is_urgent, &rodc);
2729 if (rodc && (ret == LDB_ERR_REFERRAL)) {
2730 struct ldb_dn *olddn = ac->req->op.rename.olddn;
2731 struct loadparm_context *lp_ctx;
2732 char *referral;
2733
2734 lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
2735 struct loadparm_context);
2736
2737 referral = talloc_asprintf(req,
2738 "ldap://%s/%s",
2739 lpcfg_dnsdomain(lp_ctx),
2740 ldb_dn_get_linearized(olddn));
2741 ret = ldb_module_send_referral(req, referral);
2742 talloc_free(ares);
2743 return ldb_module_done(req, NULL, NULL, ret);
2744 }
2745
2746 if (ret != LDB_SUCCESS) {
2747 talloc_free(ares);
2748 return ldb_module_done(ac->req, NULL, NULL, ret);
2749 }
2750
2751 if (ac->seq_num == 0) {
2752 talloc_free(ares);
2753 return ldb_module_done(ac->req, NULL, NULL,
2754 ldb_error(ldb, ret,
2755 "internal error seq_num == 0"));
2756 }
2757 ac->is_urgent = is_urgent;
2758
2759 ret = ldb_build_mod_req(&down_req, ldb, ac,
2760 msg,
2761 req->controls,
2762 ac, replmd_op_callback,
2763 req);
2764 LDB_REQ_SET_LOCATION(down_req);
2765 if (ret != LDB_SUCCESS) {
2766 talloc_free(ac);
2767 return ret;
2768 }
2769
2770 /* current partition control is needed by "replmd_op_callback" */
2771 if (ldb_request_get_control(req, DSDB_CONTROL_CURRENT_PARTITION_OID) == NULL) {
2772 ret = ldb_request_add_control(down_req,
2773 DSDB_CONTROL_CURRENT_PARTITION_OID,
2774 false, NULL);
2775 if (ret != LDB_SUCCESS) {
2776 talloc_free(ac);
2777 return ret;
2778 }
2779 }
2780
2781 talloc_steal(down_req, msg);
2782
2783 ret = add_time_element(msg, "whenChanged", t);
2784 if (ret != LDB_SUCCESS) {
2785 talloc_free(ac);
2786 ldb_operr(ldb);
2787 return ret;
2788 }
2789
2790 ret = add_uint64_element(ldb, msg, "uSNChanged", ac->seq_num);
2791 if (ret != LDB_SUCCESS) {
2792 talloc_free(ac);
2793 ldb_operr(ldb);
2794 return ret;
2795 }
2796
2797 /* go on with the call chain - do the modify after the rename */
2798 return ldb_next_request(ac->module, down_req);
2799 }
2800
2801 /*
2802 * remove links from objects that point at this object when an object
2803 * is deleted. We remove it from the NEXT module per MS-DRSR 5.160
2804 * RemoveObj which states that link removal due to the object being
2805 * deleted is NOT an originating update - they just go away!
2806 *
2807 */
2808 static int replmd_delete_remove_link(struct ldb_module *module,
2809 const struct dsdb_schema *schema,
2810 struct ldb_dn *dn,
2811 struct ldb_message_element *el,
2812 const struct dsdb_attribute *sa,
2813 struct ldb_request *parent)
2814 {
2815 unsigned int i;
2816 TALLOC_CTX *tmp_ctx = talloc_new(module);
2817 struct ldb_context *ldb = ldb_module_get_ctx(module);
2818
2819 for (i=0; i<el->num_values; i++) {
2820 struct dsdb_dn *dsdb_dn;
2821 NTSTATUS status;
2822 int ret;
2823 struct GUID guid2;
2824 struct ldb_message *msg;
2825 const struct dsdb_attribute *target_attr;
2826 struct ldb_message_element *el2;
2827 struct ldb_val dn_val;
2828
2829 if (dsdb_dn_is_deleted_val(&el->values[i])) {
2830 continue;
2831 }
2832
2833 dsdb_dn = dsdb_dn_parse(tmp_ctx, ldb, &el->values[i], sa->syntax->ldap_oid);
2834 if (!dsdb_dn) {
2835 talloc_free(tmp_ctx);
2836 return LDB_ERR_OPERATIONS_ERROR;
2837 }
2838
2839 status = dsdb_get_extended_dn_guid(dsdb_dn->dn, &guid2, "GUID");
2840 if (!NT_STATUS_IS_OK(status)) {
2841 talloc_free(tmp_ctx);
2842 return LDB_ERR_OPERATIONS_ERROR;
2843 }
2844
2845 /* remove the link */
2846 msg = ldb_msg_new(tmp_ctx);
2847 if (!msg) {
2848 ldb_module_oom(module);
2849 talloc_free(tmp_ctx);
2850 return LDB_ERR_OPERATIONS_ERROR;
2851 }
2852
2853
2854 msg->dn = dsdb_dn->dn;
2855
2856 target_attr = dsdb_attribute_by_linkID(schema, sa->linkID ^ 1);
2857 if (target_attr == NULL) {
2858 continue;
2859 }
2860
2861 ret = ldb_msg_add_empty(msg, target_attr->lDAPDisplayName, LDB_FLAG_MOD_DELETE, &el2);
2862 if (ret != LDB_SUCCESS) {
2863 ldb_module_oom(module);
2864 talloc_free(tmp_ctx);
2865 return LDB_ERR_OPERATIONS_ERROR;
2866 }
2867 dn_val = data_blob_string_const(ldb_dn_get_linearized(dn));
2868 el2->values = &dn_val;
2869 el2->num_values = 1;
2870
2871 ret = dsdb_module_modify(module, msg, DSDB_FLAG_OWN_MODULE, parent);
2872 if (ret != LDB_SUCCESS) {
2873 talloc_free(tmp_ctx);
2874 return ret;
2875 }
2876 }
2877 talloc_free(tmp_ctx);
2878 return LDB_SUCCESS;
2879 }
2880
2881
2882 /*
2883 handle update of replication meta data for deletion of objects
2884
2885 This also handles the mapping of delete to a rename operation
2886 to allow deletes to be replicated.
2887
2888 It also handles the incoming deleted objects, to ensure they are
2889 fully deleted here. In that case re_delete is true, and we do not
2890 use this as a signal to change the deleted state, just reinforce it.
2891
2892 */
2893 static int replmd_delete_internals(struct ldb_module *module, struct ldb_request *req, bool re_delete)
2894 {
2895 int ret = LDB_ERR_OTHER;
2896 bool retb, disallow_move_on_delete;
2897 struct ldb_dn *old_dn, *new_dn;
2898 const char *rdn_name;
2899 const struct ldb_val *rdn_value, *new_rdn_value;
2900 struct GUID guid;
2901 struct ldb_context *ldb = ldb_module_get_ctx(module);
2902 const struct dsdb_schema *schema;
2903 struct ldb_message *msg, *old_msg;
2904 struct ldb_message_element *el;
2905 TALLOC_CTX *tmp_ctx;
2906 struct ldb_result *res, *parent_res;
2907 const char *preserved_attrs[] = {
2908 /* yes, this really is a hard coded list. See MS-ADTS
2909 section 3.1.1.5.5.1.1 */
2910 "nTSecurityDescriptor", "attributeID", "attributeSyntax", "dNReferenceUpdate", "dNSHostName",
2911 "flatName", "governsID", "groupType", "instanceType", "lDAPDisplayName", "legacyExchangeDN",
2912 "isDeleted", "isRecycled", "lastKnownParent", "msDS-LastKnownRDN", "mS-DS-CreatorSID",
2913 "mSMQOwnerID", "nCName", "objectClass", "distinguishedName", "objectGUID", "objectSid",
2914 "oMSyntax", "proxiedObjectName", "name", "replPropertyMetaData", "sAMAccountName",
2915 "securityIdentifier", "sIDHistory", "subClassOf", "systemFlags", "trustPartner", "trustDirection",
2916 "trustType", "trustAttributes", "userAccountControl", "uSNChanged", "uSNCreated", "whenCreated",
2917 "whenChanged", NULL};
2918 unsigned int i, el_count = 0;
2919 enum deletion_state deletion_state, next_deletion_state;
2920
2921 if (ldb_dn_is_special(req->op.del.dn)) {
2922 return ldb_next_request(module, req);
2923 }
2924
2925 tmp_ctx = talloc_new(ldb);
2926 if (!tmp_ctx) {
2927 ldb_oom(ldb);
2928 return LDB_ERR_OPERATIONS_ERROR;
2929 }
2930
2931 schema = dsdb_get_schema(ldb, tmp_ctx);
2932 if (!schema) {
2933 talloc_free(tmp_ctx);
2934 return LDB_ERR_OPERATIONS_ERROR;
2935 }
2936
2937 old_dn = ldb_dn_copy(tmp_ctx, req->op.del.dn);
2938
2939 /* we need the complete msg off disk, so we can work out which
2940 attributes need to be removed */
2941 ret = dsdb_module_search_dn(module, tmp_ctx, &res, old_dn, NULL,
2942 DSDB_FLAG_NEXT_MODULE |
2943 DSDB_SEARCH_SHOW_RECYCLED |
2944 DSDB_SEARCH_REVEAL_INTERNALS |
2945 DSDB_SEARCH_SHOW_DN_IN_STORAGE_FORMAT, req);
2946 if (ret != LDB_SUCCESS) {
2947 ldb_asprintf_errstring(ldb_module_get_ctx(module),
2948 "repmd_delete: Failed to %s %s, because we failed to find it: %s",
2949 re_delete ? "re-delete" : "delete",
2950 ldb_dn_get_linearized(old_dn),
2951 ldb_errstring(ldb_module_get_ctx(module)));
2952 talloc_free(tmp_ctx);
2953 return ret;
2954 }
2955 old_msg = res->msgs[0];
2956
2957 replmd_deletion_state(module, old_msg,
2958 &deletion_state,
2959 &next_deletion_state);
2960
2961 /* This supports us noticing an incoming isDeleted and acting on it */
2962 if (re_delete) {
2963 SMB_ASSERT(deletion_state > OBJECT_NOT_DELETED);
2964 next_deletion_state = deletion_state;
2965 }
2966
2967 if (next_deletion_state == OBJECT_REMOVED) {
2968 struct auth_session_info *session_info =
2969 (struct auth_session_info *)ldb_get_opaque(ldb, "sessionInfo");
2970 if (security_session_user_level(session_info, NULL) != SECURITY_SYSTEM) {
2971 ldb_asprintf_errstring(ldb, "Refusing to delete deleted object %s",
2972 ldb_dn_get_linearized(old_msg->dn));
2973 return LDB_ERR_UNWILLING_TO_PERFORM;
2974 }
2975
2976 /* it is already deleted - really remove it this time */
2977 talloc_free(tmp_ctx);
2978 return ldb_next_request(module, req);
2979 }
2980
2981 rdn_name = ldb_dn_get_rdn_name(old_dn);
2982 rdn_value = ldb_dn_get_rdn_val(old_dn);
2983 if ((rdn_name == NULL) || (rdn_value == NULL)) {
2984 talloc_free(tmp_ctx);
2985 return ldb_operr(ldb);
2986 }
2987
2988 msg = ldb_msg_new(tmp_ctx);
2989 if (msg == NULL) {
2990 ldb_module_oom(module);
2991 talloc_free(tmp_ctx);
2992 return LDB_ERR_OPERATIONS_ERROR;
2993 }
2994
2995 msg->dn = old_dn;
2996
2997 /* consider the SYSTEM_FLAG_DISALLOW_MOVE_ON_DELETE flag */
2998 disallow_move_on_delete =
2999 (ldb_msg_find_attr_as_int(old_msg, "systemFlags", 0)
3000 & SYSTEM_FLAG_DISALLOW_MOVE_ON_DELETE);
3001
3002 /* work out where we will be renaming this object to */
3003 if (!disallow_move_on_delete) {
3004 ret = dsdb_get_deleted_objects_dn(ldb, tmp_ctx, old_dn,
3005 &new_dn);
3006 /*
3007 * Deleted Objects itself appears to be deleted, but
3008 * should also not be moved, and we should not move
3009 * objects if we can't find the deleted objects DN
3010 */
3011 if (re_delete && (ret != LDB_SUCCESS || ldb_dn_compare(old_dn, new_dn) == 0)) {
3012 new_dn = ldb_dn_get_parent(tmp_ctx, old_dn);
3013 if (new_dn == NULL) {
3014 ldb_module_oom(module);
3015 talloc_free(tmp_ctx);
3016 return LDB_ERR_OPERATIONS_ERROR;
3017 }
3018 } else if (ret != LDB_SUCCESS) {
3019 /* this is probably an attempted delete on a partition
3020 * that doesn't allow delete operations, such as the
3021 * schema partition */
3022 ldb_asprintf_errstring(ldb, "No Deleted Objects container for DN %s",
3023 ldb_dn_get_linearized(old_dn));
3024 talloc_free(tmp_ctx);
3025 return LDB_ERR_UNWILLING_TO_PERFORM;
3026 }
3027 } else {
3028 new_dn = ldb_dn_get_parent(tmp_ctx, old_dn);
3029 if (new_dn == NULL) {
3030 ldb_module_oom(module);
3031 talloc_free(tmp_ctx);
3032 return LDB_ERR_OPERATIONS_ERROR;
3033 }
3034 }
3035
3036 if (deletion_state == OBJECT_NOT_DELETED) {
3037 /* get the objects GUID from the search we just did */
3038 guid = samdb_result_guid(old_msg, "objectGUID");
3039
3040 /* Add a formatted child */
3041 retb = ldb_dn_add_child_fmt(new_dn, "%s=%s\\0ADEL:%s",
3042 rdn_name,
3043 ldb_dn_escape_value(tmp_ctx, *rdn_value),
3044 GUID_string(tmp_ctx, &guid));
3045 if (!retb) {
3046 DEBUG(0,(__location__ ": Unable to add a formatted child to dn: %s",
3047 ldb_dn_get_linearized(new_dn)));
3048 talloc_free(tmp_ctx);
3049 return LDB_ERR_OPERATIONS_ERROR;
3050 }
3051
3052 ret = ldb_msg_add_string(msg, "isDeleted", "TRUE");
3053 if (ret != LDB_SUCCESS) {
3054 DEBUG(0,(__location__ ": Failed to add isDeleted string to the msg\n"));
3055 ldb_module_oom(module);
3056 talloc_free(tmp_ctx);
3057 return ret;
3058 }
3059 msg->elements[el_count++].flags = LDB_FLAG_MOD_REPLACE;
3060 } else {
3061 /*
3062 * No matter what has happened with other renames etc, try again to
3063 * get this to be under the deleted DN. See MS-DRSR 5.160 RemoveObj
3064 */
3065
3066 struct ldb_dn *rdn = ldb_dn_copy(tmp_ctx, old_dn);
3067 retb = ldb_dn_remove_base_components(rdn, ldb_dn_get_comp_num(rdn) - 1);
3068 if (!retb) {
3069 DEBUG(0,(__location__ ": Unable to add a prepare rdn of %s",
3070 ldb_dn_get_linearized(rdn)));
3071 talloc_free(tmp_ctx);
3072 return LDB_ERR_OPERATIONS_ERROR;
3073 }
3074 SMB_ASSERT(ldb_dn_get_comp_num(rdn) == 1);
3075
3076 retb = ldb_dn_add_child(new_dn, rdn);
3077 if (!retb) {
3078 DEBUG(0,(__location__ ": Unable to add rdn %s to base dn: %s",
3079 ldb_dn_get_linearized(rdn),
3080 ldb_dn_get_linearized(new_dn)));
3081 talloc_free(tmp_ctx);
3082 return LDB_ERR_OPERATIONS_ERROR;
3083 }
3084 }
3085
3086 /*
3087 now we need to modify the object in the following ways:
3088
3089 - add isDeleted=TRUE
3090 - update rDN and name, with new rDN
3091 - remove linked attributes
3092 - remove objectCategory and sAMAccountType
3093 - remove attribs not on the preserved list
3094 - preserved if in above list, or is rDN
3095 - remove all linked attribs from this object
3096 - remove all links from other objects to this object
3097 - add lastKnownParent
3098 - update replPropertyMetaData?
3099
3100 see MS-ADTS "Tombstone Requirements" section 3.1.1.5.5.1.1
3101 */
3102
3103 if (deletion_state == OBJECT_NOT_DELETED) {
3104 /* we need the storage form of the parent GUID */
3105 ret = dsdb_module_search_dn(module, tmp_ctx, &parent_res,
3106 ldb_dn_get_parent(tmp_ctx, old_dn), NULL,
3107 DSDB_FLAG_NEXT_MODULE |
3108 DSDB_SEARCH_SHOW_DN_IN_STORAGE_FORMAT |
3109 DSDB_SEARCH_REVEAL_INTERNALS|
3110 DSDB_SEARCH_SHOW_RECYCLED, req);
3111 if (ret != LDB_SUCCESS) {
3112 ldb_asprintf_errstring(ldb_module_get_ctx(module),
3113 "repmd_delete: Failed to %s %s, because we failed to find it's parent (%s): %s",
3114 re_delete ? "re-delete" : "delete",
3115 ldb_dn_get_linearized(old_dn),
3116 ldb_dn_get_linearized(ldb_dn_get_parent(tmp_ctx, old_dn)),
3117 ldb_errstring(ldb_module_get_ctx(module)));
3118 talloc_free(tmp_ctx);
3119 return ret;
3120 }
3121
3122 ret = ldb_msg_add_steal_string(msg, "lastKnownParent",
3123 ldb_dn_get_extended_linearized(tmp_ctx, parent_res->msgs[0]->dn, 1));
3124 if (ret != LDB_SUCCESS) {
3125 DEBUG(0,(__location__ ": Failed to add lastKnownParent string to the msg\n"));
3126 ldb_module_oom(module);
3127 talloc_free(tmp_ctx);
3128 return ret;
3129 }
3130 msg->elements[el_count++].flags = LDB_FLAG_MOD_REPLACE;
3131
3132 if (next_deletion_state == OBJECT_DELETED) {
3133 ret = ldb_msg_add_value(msg, "msDS-LastKnownRDN", rdn_value, NULL);
3134 if (ret != LDB_SUCCESS) {
3135 DEBUG(0,(__location__ ": Failed to add msDS-LastKnownRDN string to the msg\n"));
3136 ldb_module_oom(module);
3137 talloc_free(tmp_ctx);
3138 return ret;
3139 }
3140 msg->elements[el_count++].flags = LDB_FLAG_MOD_ADD;
3141 }
3142 }
3143
3144 switch (next_deletion_state) {
3145
3146 case OBJECT_RECYCLED:
3147 case OBJECT_TOMBSTONE:
3148
3149 /*
3150 * MS-ADTS 3.1.1.5.5.1.1 Tombstone Requirements
3151 * describes what must be removed from a tombstone
3152 * object
3153 *
3154 * MS-ADTS 3.1.1.5.5.1.3 Recycled-Object Requirements
3155 * describes what must be removed from a recycled
3156 * object
3157 *
3158 */
3159
3160 /*
3161 * we also mark it as recycled, meaning this object can't be
3162 * recovered (we are stripping its attributes).
3163 * This is done only if we have this schema object of course ...
3164 * This behavior is identical to the one of Windows 2008R2 which
3165 * always set the isRecycled attribute, even if the recycle-bin is
3166 * not activated and what ever the forest level is.
3167 */
3168 if (dsdb_attribute_by_lDAPDisplayName(schema, "isRecycled") != NULL) {
3169 ret = ldb_msg_add_string(msg, "isRecycled", "TRUE");
3170 if (ret != LDB_SUCCESS) {
3171 DEBUG(0,(__location__ ": Failed to add isRecycled string to the msg\n"));
3172 ldb_module_oom(module);
3173 talloc_free(tmp_ctx);
3174 return ret;
3175 }
3176 msg->elements[el_count++].flags = LDB_FLAG_MOD_REPLACE;
3177 }
3178
3179 /* work out which of the old attributes we will be removing */
3180 for (i=0; i<old_msg->num_elements; i++) {
3181 const struct dsdb_attribute *sa;
3182 el = &old_msg->elements[i];
3183 sa = dsdb_attribute_by_lDAPDisplayName(schema, el->name);
3184 if (!sa) {
3185 talloc_free(tmp_ctx);
3186 return LDB_ERR_OPERATIONS_ERROR;
3187 }
3188 if (ldb_attr_cmp(el->name, rdn_name) == 0) {
3189 /* don't remove the rDN */
3190 continue;
3191 }
3192 if (sa->linkID && (sa->linkID & 1)) {
3193 /*
3194 we have a backlink in this object
3195 that needs to be removed. We're not
3196 allowed to remove it directly
3197 however, so we instead setup a
3198 modify to delete the corresponding
3199 forward link
3200 */
3201 ret = replmd_delete_remove_link(module, schema, old_dn, el, sa, req);
3202 if (ret != LDB_SUCCESS) {
3203 talloc_free(tmp_ctx);
3204 return LDB_ERR_OPERATIONS_ERROR;
3205 }
3206 /* now we continue, which means we
3207 won't remove this backlink
3208 directly
3209 */
3210 continue;
3211 }
3212 if (!sa->linkID && ldb_attr_in_list(preserved_attrs, el->name)) {
3213 continue;
3214 }
3215 ret = ldb_msg_add_empty(msg, el->name, LDB_FLAG_MOD_DELETE, &el);
3216 if (ret != LDB_SUCCESS) {
3217 talloc_free(tmp_ctx);
3218 ldb_module_oom(module);
3219 return ret;
3220 }
3221 }
3222
3223 /* Duplicate with the below - we remove the
3224 * samAccountType as an originating update, in case it
3225 * somehow came back. The objectCategory will have
3226 * gone in the above */
3227 ret = ldb_msg_add_empty(msg, "sAMAccountType", LDB_FLAG_MOD_REPLACE, NULL);
3228 if (ret != LDB_SUCCESS) {
3229 talloc_free(tmp_ctx);
3230 ldb_module_oom(module);
3231 return ret;
3232 }
3233
3234 break;
3235
3236 case OBJECT_DELETED:
3237 /*
3238 * MS-ADTS 3.1.1.5.5.1.2 Deleted-Object Requirements
3239 * describes what must be removed from a deleted
3240 * object
3241 */
3242
3243 ret = ldb_msg_add_empty(msg, "objectCategory", LDB_FLAG_MOD_REPLACE, NULL);
3244 if (ret != LDB_SUCCESS) {
3245 talloc_free(tmp_ctx);
3246 ldb_module_oom(module);
3247 return ret;
3248 }
3249
3250 ret = ldb_msg_add_empty(msg, "sAMAccountType", LDB_FLAG_MOD_REPLACE, NULL);
3251 if (ret != LDB_SUCCESS) {
3252 talloc_free(tmp_ctx);
3253 ldb_module_oom(module);
3254 return ret;
3255 }
3256
3257 break;
3258
3259 default:
3260 break;
3261 }
3262
3263 if (deletion_state == OBJECT_NOT_DELETED) {
3264 const struct dsdb_attribute *sa;
3265
3266 /* work out what the new rdn value is, for updating the
3267 rDN and name fields */
3268 new_rdn_value = ldb_dn_get_rdn_val(new_dn);
3269 if (new_rdn_value == NULL) {
3270 talloc_free(tmp_ctx);
3271 return ldb_operr(ldb);
3272 }
3273
3274 sa = dsdb_attribute_by_lDAPDisplayName(schema, rdn_name);
3275 if (!sa) {
3276 talloc_free(tmp_ctx);
3277 return LDB_ERR_OPERATIONS_ERROR;
3278 }
3279
3280 ret = ldb_msg_add_value(msg, sa->lDAPDisplayName, new_rdn_value,
3281 &el);
3282 if (ret != LDB_SUCCESS) {
3283 talloc_free(tmp_ctx);
3284 return ret;
3285 }
3286 el->flags = LDB_FLAG_MOD_REPLACE;
3287
3288 el = ldb_msg_find_element(old_msg, "name");
3289 if (el) {
3290 ret = ldb_msg_add_value(msg, "name", new_rdn_value, &el);
3291 if (ret != LDB_SUCCESS) {
3292 talloc_free(tmp_ctx);
3293 return ret;
3294 }
3295 el->flags = LDB_FLAG_MOD_REPLACE;
3296 }
3297 }
3298
3299 /*
3300 * TODO: Per MS-DRSR 5.160 RemoveObj we should remove links directly, not as an originating update!
3301 *
3302 */
3303
3304 ret = dsdb_module_modify(module, msg, DSDB_FLAG_OWN_MODULE, req);
3305 if (ret != LDB_SUCCESS) {
3306 ldb_asprintf_errstring(ldb, "replmd_delete: Failed to modify object %s in delete - %s",
3307 ldb_dn_get_linearized(old_dn), ldb_errstring(ldb));
3308 talloc_free(tmp_ctx);
3309 return ret;
3310 }
3311
3312 /*
3313 * No matter what has happned with other renames, try again to
3314 * get this to be under the deleted DN.
3315 */
3316 if (strcmp(ldb_dn_get_linearized(old_dn), ldb_dn_get_linearized(new_dn)) != 0) {
3317 /* now rename onto the new DN */
3318 ret = dsdb_module_rename(module, old_dn, new_dn, DSDB_FLAG_NEXT_MODULE, req);
3319 if (ret != LDB_SUCCESS){
3320 DEBUG(0,(__location__ ": Failed to rename object from '%s' to '%s' - %s\n",
3321 ldb_dn_get_linearized(old_dn),
3322 ldb_dn_get_linearized(new_dn),
3323 ldb_errstring(ldb)));
3324 talloc_free(tmp_ctx);
3325 return ret;
3326 }
3327 }
3328
3329 talloc_free(tmp_ctx);
3330
3331 return ldb_module_done(req, NULL, NULL, LDB_SUCCESS);
3332 }
3333
3334 static int replmd_delete(struct ldb_module *module, struct ldb_request *req)
3335 {
3336 return replmd_delete_internals(module, req, false);
3337 }
3338
3339
3340 static int replmd_replicated_request_error(struct replmd_replicated_request *ar, int ret)
3341 {
3342 return ret;
3343 }
3344
3345 static int replmd_replicated_request_werror(struct replmd_replicated_request *ar, WERROR status)
3346 {
3347 int ret = LDB_ERR_OTHER;
3348 /* TODO: do some error mapping */
3349 return ret;
3350 }
3351
3352
3353 static struct replPropertyMetaData1 *
3354 replmd_replPropertyMetaData1_find_attid(struct replPropertyMetaDataBlob *md_blob,
3355 enum drsuapi_DsAttributeId attid)
3356 {
3357 uint32_t i;
3358 struct replPropertyMetaDataCtr1 *rpmd_ctr = &md_blob->ctr.ctr1;
3359
3360 for (i = 0; i < rpmd_ctr->count; i++) {
3361 if (rpmd_ctr->array[i].attid == attid) {
3362 return &rpmd_ctr->array[i];
3363 }
3364 }
3365 return NULL;
3366 }
3367
3368
3369 /*
3370 return true if an update is newer than an existing entry
3371 see section 5.11 of MS-ADTS
3372 */
3373 static bool replmd_update_is_newer(const struct GUID *current_invocation_id,
3374 const struct GUID *update_invocation_id,
3375 uint32_t current_version,
3376 uint32_t update_version,
3377 NTTIME current_change_time,
3378 NTTIME update_change_time)
3379 {
3380 if (update_version != current_version) {
3381 return update_version > current_version;
3382 }
3383 if (update_change_time != current_change_time) {
3384 return update_change_time > current_change_time;
3385 }
3386 return GUID_compare(update_invocation_id, current_invocation_id) > 0;
3387 }
3388
3389 static bool replmd_replPropertyMetaData1_is_newer(struct replPropertyMetaData1 *cur_m,
3390 struct replPropertyMetaData1 *new_m)
3391 {
3392 return replmd_update_is_newer(&cur_m->originating_invocation_id,
3393 &new_m->originating_invocation_id,
3394 cur_m->version,
3395 new_m->version,
3396 cur_m->originating_change_time,
3397 new_m->originating_change_time);
3398 }
3399
3400
3401 /*
3402 form a conflict DN
3403 */
3404 static struct ldb_dn *replmd_conflict_dn(TALLOC_CTX *mem_ctx, struct ldb_dn *dn, struct GUID *guid)
3405 {
3406 const struct ldb_val *rdn_val;
3407 const char *rdn_name;
3408 struct ldb_dn *new_dn;
3409
3410 rdn_val = ldb_dn_get_rdn_val(dn);
3411 rdn_name = ldb_dn_get_rdn_name(dn);
3412 if (!rdn_val || !rdn_name) {
3413 return NULL;
3414 }
3415
3416 new_dn = ldb_dn_copy(mem_ctx, dn);
3417 if (!new_dn) {
3418 return NULL;
3419 }
3420
3421 if (!ldb_dn_remove_child_components(new_dn, 1)) {
3422 return NULL;
3423 }
3424
3425 if (!ldb_dn_add_child_fmt(new_dn, "%s=%s\\0ACNF:%s",
3426 rdn_name,
3427 ldb_dn_escape_value(new_dn, *rdn_val),
3428 GUID_string(new_dn, guid))) {
3429 return NULL;
3430 }
3431
3432 return new_dn;
3433 }
3434
3435
3436 /*
3437 perform a modify operation which sets the rDN and name attributes to
3438 their current values. This has the effect of changing these
3439 attributes to have been last updated by the current DC. This is
3440 needed to ensure that renames performed as part of conflict
3441 resolution are propogated to other DCs
3442 */
3443 static int replmd_name_modify(struct replmd_replicated_request *ar,
3444 struct ldb_request *req, struct ldb_dn *dn)
3445 {
3446 struct ldb_message *msg;
3447 const char *rdn_name;
3448 const struct ldb_val *rdn_val;
3449 const struct dsdb_attribute *rdn_attr;
3450 int ret;
3451
3452 msg = ldb_msg_new(req);
3453 if (msg == NULL) {
3454 goto failed;
3455 }
3456 msg->dn = dn;
3457
3458 rdn_name = ldb_dn_get_rdn_name(dn);
3459 if (rdn_name == NULL) {
3460 goto failed;
3461 }
3462
3463 /* normalize the rdn attribute name */
3464 rdn_attr = dsdb_attribute_by_lDAPDisplayName(ar->schema, rdn_name);
3465 if (rdn_attr == NULL) {
3466 goto failed;
3467 }
3468 rdn_name = rdn_attr->lDAPDisplayName;
3469
3470 rdn_val = ldb_dn_get_rdn_val(dn);
3471 if (rdn_val == NULL) {
3472 goto failed;
3473 }
3474
3475 if (ldb_msg_add_empty(msg, rdn_name, LDB_FLAG_MOD_REPLACE, NULL) != 0) {
3476 goto failed;
3477 }
3478 if (ldb_msg_add_value(msg, rdn_name, rdn_val, NULL) != 0) {
3479 goto failed;
3480 }
3481 if (ldb_msg_add_empty(msg, "name", LDB_FLAG_MOD_REPLACE, NULL) != 0) {
3482 goto failed;
3483 }
3484 if (ldb_msg_add_value(msg, "name", rdn_val, NULL) != 0) {
3485 goto failed;
3486 }
3487
3488 ret = dsdb_module_modify(ar->module, msg, DSDB_FLAG_OWN_MODULE, req);
3489 if (ret != LDB_SUCCESS) {
3490 DEBUG(0,(__location__ ": Failed to modify rDN/name of conflict DN '%s' - %s",
3491 ldb_dn_get_linearized(dn),
3492 ldb_errstring(ldb_module_get_ctx(ar->module))));
3493 return ret;
3494 }
3495
3496 talloc_free(msg);
3497
3498 return LDB_SUCCESS;
3499
3500 failed:
3501 talloc_free(msg);
3502 DEBUG(0,(__location__ ": Failed to setup modify rDN/name of conflict DN '%s'",
3503 ldb_dn_get_linearized(dn)));
3504 return LDB_ERR_OPERATIONS_ERROR;
3505 }
3506
3507
3508 /*
3509 callback for conflict DN handling where we have renamed the incoming
3510 record. After renaming it, we need to ensure the change of name and
3511 rDN for the incoming record is seen as an originating update by this DC.
3512
3513 This also handles updating lastKnownParent for entries sent to lostAndFound
3514 */
3515 static int replmd_op_name_modify_callback(struct ldb_request *req, struct ldb_reply *ares)
3516 {
3517 struct replmd_replicated_request *ar =
3518 talloc_get_type_abort(req->context, struct replmd_replicated_request);
3519 struct ldb_dn *conflict_dn;
3520 int ret;
3521
3522 if (ares->error != LDB_SUCCESS) {
3523 /* call the normal callback for everything except success */
3524 return replmd_op_callback(req, ares);
3525 }
3526
3527 switch (req->operation) {
3528 case LDB_ADD:
3529 conflict_dn = req->op.add.message->dn;
3530 break;
3531 case LDB_MODIFY:
3532 conflict_dn = req->op.mod.message->dn;
3533 break;
3534 default:
3535 smb_panic("replmd_op_name_modify_callback called in unknown circumstances");
3536 }
3537
3538 /* perform a modify of the rDN and name of the record */
3539 ret = replmd_name_modify(ar, req, conflict_dn);
3540 if (ret != LDB_SUCCESS) {
3541 ares->error = ret;
3542 return replmd_op_callback(req, ares);
3543 }
3544
3545 if (ar->objs->objects[ar->index_current].last_known_parent) {
3546 struct ldb_message *msg = ldb_msg_new(req);
3547 if (msg == NULL) {
3548 ldb_module_oom(ar->module);
3549 return LDB_ERR_OPERATIONS_ERROR;
3550 }
3551
3552 msg->dn = req->op.add.message->dn;
3553
3554 ret = ldb_msg_add_steal_string(msg, "lastKnownParent",
3555 ldb_dn_get_extended_linearized(msg, ar->objs->objects[ar->index_current].last_known_parent, 1));
3556 if (ret != LDB_SUCCESS) {
3557 DEBUG(0,(__location__ ": Failed to add lastKnownParent string to the msg\n"));
3558 ldb_module_oom(ar->module);
3559 return ret;
3560 }
3561 msg->elements[0].flags = LDB_FLAG_MOD_REPLACE;
3562
3563 ret = dsdb_module_modify(ar->module, msg, DSDB_FLAG_OWN_MODULE, req);
3564 if (ret != LDB_SUCCESS) {
3565 DEBUG(0,(__location__ ": Failed to modify lastKnownParent of lostAndFound DN '%s' - %s",
3566 ldb_dn_get_linearized(msg->dn),
3567 ldb_errstring(ldb_module_get_ctx(ar->module))));
3568 return ret;
3569 }
3570 TALLOC_FREE(msg);
3571 }
3572
3573 return replmd_op_callback(req, ares);
3574 }
3575
3576 /*
3577 callback for replmd_replicated_apply_add() and replmd_replicated_handle_rename()
3578 This copes with the creation of conflict records in the case where
3579 the DN exists, but with a different objectGUID
3580 */
3581 static int replmd_op_possible_conflict_callback(struct ldb_request *req, struct ldb_reply *ares, int (*callback)(struct ldb_request *req, struct ldb_reply *ares))
3582 {
3583 struct ldb_dn *conflict_dn;
3584 struct replmd_replicated_request *ar =
3585 talloc_get_type_abort(req->context, struct replmd_replicated_request);
3586 struct ldb_result *res;
3587 const char *attrs[] = { "replPropertyMetaData", "objectGUID", NULL };
3588 int ret;
3589 const struct ldb_val *omd_value;
3590 struct replPropertyMetaDataBlob omd, *rmd;
3591 enum ndr_err_code ndr_err;
3592 bool rename_incoming_record, rodc;
3593 struct replPropertyMetaData1 *rmd_name, *omd_name;
3594 struct ldb_message *msg;
3595
3596 req->callback = callback;
3597
3598 if (ares->error != LDB_ERR_ENTRY_ALREADY_EXISTS) {
3599 /* call the normal callback for everything except
3600 conflicts */
3601 return ldb_module_done(req, ares->controls, ares->response, ares->error);
3602 }
3603
3604 ret = samdb_rodc(ldb_module_get_ctx(ar->module), &rodc);
3605 if (ret != LDB_SUCCESS) {
3606 ldb_asprintf_errstring(ldb_module_get_ctx(ar->module), "Failed to determine if we are an RODC when attempting to form conflict DN: %s", ldb_errstring(ldb_module_get_ctx(ar->module)));
3607 return ldb_module_done(req, ares->controls, ares->response, LDB_ERR_OPERATIONS_ERROR);
3608 }
3609 /*
3610 * we have a conflict, and need to decide if we will keep the
3611 * new record or the old record
3612 */
3613
3614 msg = ar->objs->objects[ar->index_current].msg;
3615
3616 switch (req->operation) {
3617 case LDB_ADD:
3618 conflict_dn = msg->dn;
3619 break;
3620 case LDB_RENAME:
3621 conflict_dn = req->op.rename.newdn;
3622 break;
3623 default:
3624 return ldb_module_done(req, ares->controls, ares->response, ldb_module_operr(ar->module));
3625 }
3626
3627 if (rodc) {
3628 /*
3629 * We are on an RODC, or were a GC for this
3630 * partition, so we have to fail this until
3631 * someone who owns the partition sorts it
3632 * out
3633 */
3634 ldb_asprintf_errstring(ldb_module_get_ctx(ar->module),
3635 "Conflict adding object '%s' from incoming replication as we are read only for the partition. \n"
3636 " - We must fail the operation until a master for this partition resolves the conflict",
3637 ldb_dn_get_linearized(conflict_dn));
3638 goto failed;
3639 }
3640
3641 /*
3642 * first we need the replPropertyMetaData attribute from the
3643 * old record
3644 */
3645 ret = dsdb_module_search_dn(ar->module, req, &res, conflict_dn,
3646 attrs,
3647 DSDB_FLAG_NEXT_MODULE |
3648 DSDB_SEARCH_SHOW_DELETED |
3649 DSDB_SEARCH_SHOW_RECYCLED, req);
3650 if (ret != LDB_SUCCESS) {
3651 DEBUG(0,(__location__ ": Unable to find object for conflicting record '%s'\n",
3652 ldb_dn_get_linearized(conflict_dn)));
3653 goto failed;
3654 }
3655
3656 omd_value = ldb_msg_find_ldb_val(res->msgs[0], "replPropertyMetaData");
3657 if (omd_value == NULL) {
3658 DEBUG(0,(__location__ ": Unable to find replPropertyMetaData for conflicting record '%s'\n",
3659 ldb_dn_get_linearized(conflict_dn)));
3660 goto failed;
3661 }
3662
3663 ndr_err = ndr_pull_struct_blob(omd_value, res->msgs[0], &omd,
3664 (ndr_pull_flags_fn_t)ndr_pull_replPropertyMetaDataBlob);
3665 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
3666 DEBUG(0,(__location__ ": Failed to parse old replPropertyMetaData for %s\n",
3667 ldb_dn_get_linearized(conflict_dn)));
3668 goto failed;
3669 }
3670
3671 rmd = ar->objs->objects[ar->index_current].meta_data;
3672
3673 /* we decide which is newer based on the RPMD on the name
3674 attribute. See [MS-DRSR] ResolveNameConflict */
3675 rmd_name = replmd_replPropertyMetaData1_find_attid(rmd, DRSUAPI_ATTID_name);
3676 omd_name = replmd_replPropertyMetaData1_find_attid(&omd, DRSUAPI_ATTID_name);
3677 if (!rmd_name || !omd_name) {
3678 DEBUG(0,(__location__ ": Failed to find name attribute in replPropertyMetaData for %s\n",
3679 ldb_dn_get_linearized(conflict_dn)));
3680 goto failed;
3681 }
3682
3683 rename_incoming_record = !(ar->objs->dsdb_repl_flags & DSDB_REPL_FLAG_PRIORITISE_INCOMING) &&
3684 !replmd_replPropertyMetaData1_is_newer(omd_name, rmd_name);
3685
3686 if (rename_incoming_record) {
3687 struct GUID guid;
3688 struct ldb_dn *new_dn;
3689
3690 /*
3691 * We want to run the original callback here, which
3692 * will return LDB_ERR_ENTRY_ALREADY_EXISTS to the
3693 * caller, which will in turn know to rename the
3694 * incoming record. The error string is set in case
3695 * this isn't handled properly at some point in the
3696 * future.
3697 */
3698 if (req->operation == LDB_RENAME) {
3699 ldb_asprintf_errstring(ldb_module_get_ctx(ar->module),
3700 "Unable to handle incoming renames where this would "
3701 "create a conflict. Incoming record is %s (caller to handle)\n",
3702 ldb_dn_get_extended_linearized(req, conflict_dn, 1));
3703
3704 goto failed;
3705 }
3706
3707 guid = samdb_result_guid(msg, "objectGUID");
3708 if (GUID_all_zero(&guid)) {
3709 DEBUG(0,(__location__ ": Failed to find objectGUID for conflicting incoming record %s\n",
3710 ldb_dn_get_linearized(conflict_dn)));
3711 goto failed;
3712 }
3713 new_dn = replmd_conflict_dn(req, conflict_dn, &guid);
3714 if (new_dn == NULL) {
3715 DEBUG(0,(__location__ ": Failed to form conflict DN for %s\n",
3716 ldb_dn_get_linearized(conflict_dn)));
3717 goto failed;
3718 }
3719
3720 DEBUG(2,(__location__ ": Resolving conflict record via incoming rename '%s' -> '%s'\n",
3721 ldb_dn_get_linearized(conflict_dn), ldb_dn_get_linearized(new_dn)));
3722
3723 /* re-submit the request, but with a different
3724 callback, so we don't loop forever. */
3725 msg->dn = new_dn;
3726 req->callback = replmd_op_name_modify_callback;
3727
3728 return ldb_next_request(ar->module, req);
3729 } else {
3730 /* we are renaming the existing record */
3731 struct GUID guid;
3732 struct ldb_dn *new_dn;
3733
3734 guid = samdb_result_guid(res->msgs[0], "objectGUID");
3735 if (GUID_all_zero(&guid)) {
3736 DEBUG(0,(__location__ ": Failed to find objectGUID for existing conflict record %s\n",
3737 ldb_dn_get_linearized(conflict_dn)));
3738 goto failed;
3739 }
3740
3741 new_dn = replmd_conflict_dn(req, conflict_dn, &guid);
3742 if (new_dn == NULL) {
3743 DEBUG(0,(__location__ ": Failed to form conflict DN for %s\n",
3744 ldb_dn_get_linearized(conflict_dn)));
3745 goto failed;
3746 }
3747
3748 DEBUG(2,(__location__ ": Resolving conflict record via existing rename '%s' -> '%s'\n",
3749 ldb_dn_get_linearized(conflict_dn), ldb_dn_get_linearized(new_dn)));
3750
3751 ret = dsdb_module_rename(ar->module, conflict_dn, new_dn,
3752 DSDB_FLAG_OWN_MODULE, req);
3753 if (ret != LDB_SUCCESS) {
3754 DEBUG(0,(__location__ ": Failed to rename conflict dn '%s' to '%s' - %s\n",
3755 ldb_dn_get_linearized(conflict_dn),
3756 ldb_dn_get_linearized(new_dn),
3757 ldb_errstring(ldb_module_get_ctx(ar->module))));
3758 goto failed;
3759 }
3760
3761 /*
3762 * now we need to ensure that the rename is seen as an
3763 * originating update. We do that with a modify.
3764 */
3765 ret = replmd_name_modify(ar, req, new_dn);
3766 if (ret != LDB_SUCCESS) {
3767 goto failed;
3768 }
3769
3770 return ldb_next_request(ar->module, req);
3771 }
3772
3773 failed:
3774 /* on failure do the original callback. This means replication
3775 * will stop with an error, but there is not much else we can
3776 * do
3777 */
3778 return ldb_module_done(req, ares->controls, ares->response, ares->error);
3779 }
3780
3781 /*
3782 callback for replmd_replicated_apply_add()
3783 This copes with the creation of conflict records in the case where
3784 the DN exists, but with a different objectGUID
3785 */
3786 static int replmd_op_add_callback(struct ldb_request *req, struct ldb_reply *ares)
3787 {
3788 struct replmd_replicated_request *ar =
3789 talloc_get_type_abort(req->context, struct replmd_replicated_request);
3790
3791 if (ar->objs->objects[ar->index_current].last_known_parent) {
3792 /* This is like a conflict DN, where we put the object in LostAndFound
3793 see MS-DRSR 4.1.10.6.10 FindBestParentObject */
3794 return replmd_op_possible_conflict_callback(req, ares, replmd_op_name_modify_callback);
3795 }
3796
3797 return replmd_op_possible_conflict_callback(req, ares, replmd_op_callback);
3798 }
3799
3800 /*
3801 callback for replmd_replicated_handle_rename()
3802 This copes with the creation of conflict records in the case where
3803 the DN exists, but with a different objectGUID
3804 */
3805 static int replmd_op_rename_callback(struct ldb_request *req, struct ldb_reply *ares)
3806 {
3807 return replmd_op_possible_conflict_callback(req, ares, ldb_modify_default_callback);
3808 }
3809
3810 /*
3811 this is called when a new object comes in over DRS
3812 */
3813 static int replmd_replicated_apply_add(struct replmd_replicated_request *ar)
3814 {
3815 struct ldb_context *ldb;
3816 struct ldb_request *change_req;
3817 enum ndr_err_code ndr_err;
3818 struct ldb_message *msg;
3819 struct replPropertyMetaDataBlob *md;
3820 struct ldb_val md_value;
3821 unsigned int i;
3822 int ret;
3823 bool remote_isDeleted = false;
3824
3825 ldb = ldb_module_get_ctx(ar->module);
3826 msg = ar->objs->objects[ar->index_current].msg;
3827 md = ar->objs->objects[ar->index_current].meta_data;
3828
3829 ret = ldb_sequence_number(ldb, LDB_SEQ_NEXT, &ar->seq_num);
3830 if (ret != LDB_SUCCESS) {
3831 return replmd_replicated_request_error(ar, ret);
3832 }
3833
3834 ret = ldb_msg_add_value(msg, "objectGUID", &ar->objs->objects[ar->index_current].guid_value, NULL);
3835 if (ret != LDB_SUCCESS) {
3836 return replmd_replicated_request_error(ar, ret);
3837 }
3838
3839 ret = ldb_msg_add_string(msg, "whenChanged", ar->objs->objects[ar->index_current].when_changed);
3840 if (ret != LDB_SUCCESS) {
3841 return replmd_replicated_request_error(ar, ret);
3842 }
3843
3844 ret = samdb_msg_add_uint64(ldb, msg, msg, "uSNCreated", ar->seq_num);
3845 if (ret != LDB_SUCCESS) {
3846 return replmd_replicated_request_error(ar, ret);
3847 }
3848
3849 ret = samdb_msg_add_uint64(ldb, msg, msg, "uSNChanged", ar->seq_num);
3850 if (ret != LDB_SUCCESS) {
3851 return replmd_replicated_request_error(ar, ret);
3852 }
3853
3854 /* remove any message elements that have zero values */
3855 for (i=0; i<msg->num_elements; i++) {
3856 struct ldb_message_element *el = &msg->elements[i];
3857
3858 if (el->num_values == 0) {
3859 DEBUG(4,(__location__ ": Removing attribute %s with num_values==0\n",
3860 el->name));
3861 memmove(el, el+1, sizeof(*el)*(msg->num_elements - (i+1)));
3862 msg->num_elements--;
3863 i--;
3864 continue;
3865 }
3866 }
3867
3868 remote_isDeleted = ldb_msg_find_attr_as_bool(msg,
3869 "isDeleted", false);
3870
3871 /*
3872 * the meta data array is already sorted by the caller
3873 */
3874 for (i=0; i < md->ctr.ctr1.count; i++) {
3875 md->ctr.ctr1.array[i].local_usn = ar->seq_num;
3876 }
3877 ndr_err = ndr_push_struct_blob(&md_value, msg, md,
3878 (ndr_push_flags_fn_t)ndr_push_replPropertyMetaDataBlob);
3879 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
3880 NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
3881 return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
3882 }
3883 ret = ldb_msg_add_value(msg, "replPropertyMetaData", &md_value, NULL);
3884 if (ret != LDB_SUCCESS) {
3885 return replmd_replicated_request_error(ar, ret);
3886 }
3887
3888 replmd_ldb_message_sort(msg, ar->schema);
3889
3890 if (!remote_isDeleted) {
3891 ret = dsdb_module_schedule_sd_propagation(ar->module,
3892 ar->objs->partition_dn,
3893 msg->dn, true);
3894 if (ret != LDB_SUCCESS) {
3895 return replmd_replicated_request_error(ar, ret);
3896 }
3897 }
3898
3899 ar->isDeleted = remote_isDeleted;
3900
3901 if (DEBUGLVL(4)) {
3902 char *s = ldb_ldif_message_string(ldb, ar, LDB_CHANGETYPE_ADD, msg);
3903 DEBUG(4, ("DRS replication add message:\n%s\n", s));
3904 talloc_free(s);
3905 }
3906
3907 ret = ldb_build_add_req(&change_req,
3908 ldb,
3909 ar,
3910 msg,
3911 ar->controls,
3912 ar,
3913 replmd_op_add_callback,
3914 ar->req);
3915 LDB_REQ_SET_LOCATION(change_req);
3916 if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
3917
3918 /* current partition control needed by "repmd_op_callback" */
3919 ret = ldb_request_add_control(change_req,
3920 DSDB_CONTROL_CURRENT_PARTITION_OID,
3921 false, NULL);
3922 if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
3923
3924 if (ar->objs->dsdb_repl_flags & DSDB_REPL_FLAG_PARTIAL_REPLICA) {
3925 /* this tells the partition module to make it a
3926 partial replica if creating an NC */
3927 ret = ldb_request_add_control(change_req,
3928 DSDB_CONTROL_PARTIAL_REPLICA,
3929 false, NULL);
3930 if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
3931 }
3932
3933 return ldb_next_request(ar->module, change_req);
3934 }
3935
3936 static int replmd_replicated_apply_search_for_parent_callback(struct ldb_request *req,
3937 struct ldb_reply *ares)
3938 {
3939 struct replmd_replicated_request *ar = talloc_get_type(req->context,
3940 struct replmd_replicated_request);
3941 int ret;
3942
3943 if (!ares) {
3944 return ldb_module_done(ar->req, NULL, NULL,
3945 LDB_ERR_OPERATIONS_ERROR);
3946 }
3947 if (ares->error != LDB_SUCCESS &&
3948 ares->error != LDB_ERR_NO_SUCH_OBJECT) {
3949 /*
3950 * TODO: deal with the above error that the parent object doesn't exist
3951 */
3952
3953 return ldb_module_done(ar->req, ares->controls,
3954 ares->response, ares->error);
3955 }
3956
3957 switch (ares->type) {
3958 case LDB_REPLY_ENTRY:
3959 {
3960 struct ldb_message *parent_msg = ares->message;
3961 struct ldb_message *msg = ar->objs->objects[ar->index_current].msg;
3962 struct ldb_dn *parent_dn;
3963 int comp_num;
3964
3965 if (!ldb_msg_check_string_attribute(msg, "isDeleted", "TRUE")
3966 && ldb_msg_check_string_attribute(parent_msg, "isDeleted", "TRUE")) {
3967 /* Per MS-DRSR 4.1.10.6.10
3968 * FindBestParentObject we need to move this
3969 * new object under a deleted object to
3970 * lost-and-found */
3971 struct ldb_dn *nc_root;
3972
3973 ret = dsdb_find_nc_root(ldb_module_get_ctx(ar->module), msg, msg->dn, &nc_root);
3974 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
3975 ldb_asprintf_errstring(ldb_module_get_ctx(ar->module),
3976 "No suitable NC root found for %s. "
3977 "We need to move this object because parent object %s "
3978 "is deleted, but this object is not.",
3979 ldb_dn_get_linearized(msg->dn),
3980 ldb_dn_get_linearized(parent_msg->dn));
3981 return ldb_module_done(ar->req, NULL, NULL, LDB_ERR_OPERATIONS_ERROR);
3982 } else if (ret != LDB_SUCCESS) {
3983 ldb_asprintf_errstring(ldb_module_get_ctx(ar->module),
3984 "Unable to find NC root for %s: %s. "
3985 "We need to move this object because parent object %s "
3986 "is deleted, but this object is not.",
3987 ldb_dn_get_linearized(msg->dn),
3988 ldb_errstring(ldb_module_get_ctx(ar->module)),
3989 ldb_dn_get_linearized(parent_msg->dn));
3990 return ldb_module_done(ar->req, NULL, NULL, LDB_ERR_OPERATIONS_ERROR);
3991 }
3992
3993 ret = dsdb_wellknown_dn(ldb_module_get_ctx(ar->module), msg,
3994 nc_root,
3995 DS_GUID_LOSTANDFOUND_CONTAINER,
3996 &parent_dn);
3997 if (ret != LDB_SUCCESS) {
3998 ldb_asprintf_errstring(ldb_module_get_ctx(ar->module),
3999 "Unable to find LostAndFound Container for %s "
4000 "in partition %s: %s. "
4001 "We need to move this object because parent object %s "
4002 "is deleted, but this object is not.",
4003 ldb_dn_get_linearized(msg->dn), ldb_dn_get_linearized(nc_root),
4004 ldb_errstring(ldb_module_get_ctx(ar->module)),
4005 ldb_dn_get_linearized(parent_msg->dn));
4006 return ldb_module_done(ar->req, NULL, NULL, LDB_ERR_OPERATIONS_ERROR);
4007 }
4008 ar->objs->objects[ar->index_current].last_known_parent
4009 = talloc_steal(ar->objs->objects[ar->index_current].msg, parent_msg->dn);
4010 } else {
4011 parent_dn = parent_msg->dn;
4012 }
4013
4014 comp_num = ldb_dn_get_comp_num(msg->dn);
4015 if (comp_num > 1) {
4016 if (!ldb_dn_remove_base_components(msg->dn, comp_num - 1)) {
4017 talloc_free(ares);
4018 return ldb_module_done(ar->req, NULL, NULL, ldb_module_operr(ar->module));
4019 }
4020 }
4021 if (!ldb_dn_add_base(msg->dn, parent_dn)) {
4022 talloc_free(ares);
4023 return ldb_module_done(ar->req, NULL, NULL, ldb_module_operr(ar->module));
4024 }
4025 break;
4026 }
4027 case LDB_REPLY_REFERRAL:
4028 /* we ignore referrals */
4029 break;
4030
4031 case LDB_REPLY_DONE:
4032 if (ar->search_msg != NULL) {
4033 ret = replmd_replicated_apply_merge(ar);
4034 } else {
4035 ret = replmd_replicated_apply_add(ar);
4036 }
4037 if (ret != LDB_SUCCESS) {
4038 return ldb_module_done(ar->req, NULL, NULL, ret);
4039 }
4040 }
4041
4042 talloc_free(ares);
4043 return LDB_SUCCESS;
4044 }
4045
4046 /*
4047 * Look for the parent object, so we put the new object in the right
4048 * place This is akin to NameObject in MS-DRSR - this routine and the
4049 * callbacks find the right parent name, and correct name for this
4050 * object
4051 */
4052
4053 static int replmd_replicated_apply_search_for_parent(struct replmd_replicated_request *ar)
4054 {
4055 struct ldb_context *ldb;
4056 int ret;
4057 char *tmp_str;
4058 char *filter;
4059 struct ldb_request *search_req;
4060 static const char *attrs[] = {"isDeleted", NULL};
4061
4062 ldb = ldb_module_get_ctx(ar->module);
4063
4064 if (!ar->objs->objects[ar->index_current].parent_guid_value.data) {
4065 if (ar->search_msg != NULL) {
4066 return replmd_replicated_apply_merge(ar);
4067 } else {
4068 return replmd_replicated_apply_add(ar);
4069 }
4070 }
4071
4072 tmp_str = ldb_binary_encode(ar, ar->objs->objects[ar->index_current].parent_guid_value);
4073 if (!tmp_str) return replmd_replicated_request_werror(ar, WERR_NOMEM);
4074
4075 filter = talloc_asprintf(ar, "(objectGUID=%s)", tmp_str);
4076 if (!filter) return replmd_replicated_request_werror(ar, WERR_NOMEM);
4077 talloc_free(tmp_str);
4078
4079 ret = ldb_build_search_req(&search_req,
4080 ldb,
4081 ar,
4082 ar->objs->partition_dn,
4083 LDB_SCOPE_SUBTREE,
4084 filter,
4085 attrs,
4086 NULL,
4087 ar,
4088 replmd_replicated_apply_search_for_parent_callback,
4089 ar->req);
4090 LDB_REQ_SET_LOCATION(search_req);
4091
4092 ret = dsdb_request_add_controls(search_req,
4093 DSDB_SEARCH_SHOW_RECYCLED|
4094 DSDB_SEARCH_SHOW_DELETED|
4095 DSDB_SEARCH_SHOW_EXTENDED_DN);
4096 if (ret != LDB_SUCCESS) {
4097 return ret;
4098 }
4099
4100 return ldb_next_request(ar->module, search_req);
4101 }
4102
4103 /*
4104 handle renames that come in over DRS replication
4105 */
4106 static int replmd_replicated_handle_rename(struct replmd_replicated_request *ar,
4107 struct ldb_message *msg,
4108 struct ldb_request *parent)
4109 {
4110 struct ldb_request *req;
4111 int ret;
4112 TALLOC_CTX *tmp_ctx = talloc_new(msg);
4113 struct ldb_result *res;
4114
4115 DEBUG(4,("replmd_replicated_request rename %s => %s\n",
4116 ldb_dn_get_linearized(ar->search_msg->dn),
4117 ldb_dn_get_linearized(msg->dn)));
4118
4119
4120 res = talloc_zero(tmp_ctx, struct ldb_result);
4121 if (!res) {
4122 talloc_free(tmp_ctx);
4123 return ldb_oom(ldb_module_get_ctx(ar->module));
4124 }
4125
4126 /* pass rename to the next module
4127 * so it doesn't appear as an originating update */
4128 ret = ldb_build_rename_req(&req, ldb_module_get_ctx(ar->module), tmp_ctx,
4129 ar->search_msg->dn, msg->dn,
4130 NULL,
4131 ar,
4132 replmd_op_rename_callback,
4133 parent);
4134 LDB_REQ_SET_LOCATION(req);
4135 if (ret != LDB_SUCCESS) {
4136 talloc_free(tmp_ctx);
4137 return ret;
4138 }
4139
4140 ret = dsdb_request_add_controls(req, DSDB_MODIFY_RELAX);
4141 if (ret != LDB_SUCCESS) {
4142 talloc_free(tmp_ctx);
4143 return ret;
4144 }
4145
4146 ret = ldb_next_request(ar->module, req);
4147
4148 if (ret == LDB_SUCCESS) {
4149 ret = ldb_wait(req->handle, LDB_WAIT_ALL);
4150 }
4151
4152 talloc_free(tmp_ctx);
4153 return ret;
4154 }
4155
4156
4157 static int replmd_replicated_apply_merge(struct replmd_replicated_request *ar)
4158 {
4159 struct ldb_context *ldb;
4160 struct ldb_request *change_req;
4161 enum ndr_err_code ndr_err;
4162 struct ldb_message *msg;
4163 struct replPropertyMetaDataBlob *rmd;
4164 struct replPropertyMetaDataBlob omd;
4165 const struct ldb_val *omd_value;
4166 struct replPropertyMetaDataBlob nmd;
4167 struct ldb_val nmd_value;
4168 unsigned int i;
4169 uint32_t j,ni=0;
4170 unsigned int removed_attrs = 0;
4171 int ret;
4172 int (*callback)(struct ldb_request *req, struct ldb_reply *ares) = replmd_op_callback;
4173 bool isDeleted = false;
4174 bool local_isDeleted = false;
4175 bool remote_isDeleted = false;
4176 bool take_remote_isDeleted = false;
4177 bool sd_updated = false;
4178 bool renamed = false;
4179
4180 ldb = ldb_module_get_ctx(ar->module);
4181 msg = ar->objs->objects[ar->index_current].msg;
4182
4183 rmd = ar->objs->objects[ar->index_current].meta_data;
4184 ZERO_STRUCT(omd);
4185 omd.version = 1;
4186
4187 /* find existing meta data */
4188 omd_value = ldb_msg_find_ldb_val(ar->search_msg, "replPropertyMetaData");
4189 if (omd_value) {
4190 ndr_err = ndr_pull_struct_blob(omd_value, ar, &omd,
4191 (ndr_pull_flags_fn_t)ndr_pull_replPropertyMetaDataBlob);
4192 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
4193 NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
4194 return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
4195 }
4196
4197 if (omd.version != 1) {
4198 return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
4199 }
4200 }
4201
4202 local_isDeleted = ldb_msg_find_attr_as_bool(ar->search_msg,
4203 "isDeleted", false);
4204 remote_isDeleted = ldb_msg_find_attr_as_bool(msg,
4205 "isDeleted", false);
4206
4207 if (strcmp(ldb_dn_get_linearized(msg->dn), ldb_dn_get_linearized(ar->search_msg->dn)) == 0) {
4208 ret = LDB_SUCCESS;
4209 } else {
4210 /*
4211 * handle renames, even just by case that come in over
4212 * DRS. Changes in the parent DN don't hit us here,
4213 * because the search for a parent will clean up those
4214 * components.
4215 *
4216 * We also have already filtered out the case where
4217 * the peer has an older name to what we have (see
4218 * replmd_replicated_apply_search_callback())
4219 */
4220 renamed = true;
4221 ret = replmd_replicated_handle_rename(ar, msg, ar->req);
4222 }
4223
4224 /*
4225 * This particular error code means that we already tried the
4226 * conflict algrorithm, and the existing record name was newer, so we
4227 * need to rename the incoming record
4228 */
4229 if (ret == LDB_ERR_ENTRY_ALREADY_EXISTS) {
4230 struct GUID guid;
4231 NTSTATUS status;
4232 struct ldb_dn *new_dn;
4233 status = GUID_from_ndr_blob(&ar->objs->objects[ar->index_current].guid_value, &guid);
4234 /* This really, really can't fail */
4235 SMB_ASSERT(NT_STATUS_IS_OK(status));
4236
4237 new_dn = replmd_conflict_dn(msg, msg->dn, &guid);
4238 if (new_dn == NULL) {
4239 ldb_asprintf_errstring(ldb_module_get_ctx(ar->module),
4240 "Failed to form conflict DN for %s\n",
4241 ldb_dn_get_linearized(msg->dn));
4242
4243 return replmd_replicated_request_werror(ar, WERR_NOMEM);
4244 }
4245
4246 ret = dsdb_module_rename(ar->module, ar->search_msg->dn, new_dn,
4247 DSDB_FLAG_NEXT_MODULE, ar->req);
4248 if (ret != LDB_SUCCESS) {
4249 ldb_asprintf_errstring(ldb_module_get_ctx(ar->module),
4250 "Failed to rename incoming conflicting dn '%s' (was '%s') to '%s' - %s\n",
4251 ldb_dn_get_linearized(msg->dn),
4252 ldb_dn_get_linearized(ar->search_msg->dn),
4253 ldb_dn_get_linearized(new_dn),
4254 ldb_errstring(ldb_module_get_ctx(ar->module)));
4255 return replmd_replicated_request_werror(ar, WERR_DS_DRA_DB_ERROR);
4256 }
4257
4258 /* Set the callback to one that will fix up the name to be a conflict DN */
4259 callback = replmd_op_name_modify_callback;
4260 msg->dn = new_dn;
4261 renamed = true;
4262 } else if (ret != LDB_SUCCESS) {
4263 ldb_debug(ldb, LDB_DEBUG_FATAL,
4264 "replmd_replicated_request rename %s => %s failed - %s\n",
4265 ldb_dn_get_linearized(ar->search_msg->dn),
4266 ldb_dn_get_linearized(msg->dn),
4267 ldb_errstring(ldb));
4268 return replmd_replicated_request_werror(ar, WERR_DS_DRA_DB_ERROR);
4269 }
4270
4271 ZERO_STRUCT(nmd);
4272 nmd.version = 1;
4273 nmd.ctr.ctr1.count = omd.ctr.ctr1.count + rmd->ctr.ctr1.count;
4274 nmd.ctr.ctr1.array = talloc_array(ar,
4275 struct replPropertyMetaData1,
4276 nmd.ctr.ctr1.count);
4277 if (!nmd.ctr.ctr1.array) return replmd_replicated_request_werror(ar, WERR_NOMEM);
4278
4279 /* first copy the old meta data */
4280 for (i=0; i < omd.ctr.ctr1.count; i++) {
4281 nmd.ctr.ctr1.array[ni] = omd.ctr.ctr1.array[i];
4282 ni++;
4283 }
4284
4285 ar->seq_num = 0;
4286 /* now merge in the new meta data */
4287 for (i=0; i < rmd->ctr.ctr1.count; i++) {
4288 bool found = false;
4289
4290 for (j=0; j < ni; j++) {
4291 bool cmp;
4292
4293 if (rmd->ctr.ctr1.array[i].attid != nmd.ctr.ctr1.array[j].attid) {
4294 continue;
4295 }
4296
4297 if (ar->objs->dsdb_repl_flags & DSDB_REPL_FLAG_PRIORITISE_INCOMING) {
4298 /* if we compare equal then do an
4299 update. This is used when a client
4300 asks for a FULL_SYNC, and can be
4301 used to recover a corrupt
4302 replica */
4303 cmp = !replmd_replPropertyMetaData1_is_newer(&rmd->ctr.ctr1.array[i],
4304 &nmd.ctr.ctr1.array[j]);
4305 } else {
4306 cmp = replmd_replPropertyMetaData1_is_newer(&nmd.ctr.ctr1.array[j],
4307 &rmd->ctr.ctr1.array[i]);
4308 }
4309 if (cmp) {
4310 /* replace the entry */
4311 nmd.ctr.ctr1.array[j] = rmd->ctr.ctr1.array[i];
4312 if (ar->seq_num == 0) {
4313 ret = ldb_sequence_number(ldb, LDB_SEQ_NEXT, &ar->seq_num);
4314 if (ret != LDB_SUCCESS) {
4315 return replmd_replicated_request_error(ar, ret);
4316 }
4317 }
4318 nmd.ctr.ctr1.array[j].local_usn = ar->seq_num;
4319 switch (nmd.ctr.ctr1.array[j].attid) {
4320 case DRSUAPI_ATTID_ntSecurityDescriptor:
4321 sd_updated = true;
4322 break;
4323 case DRSUAPI_ATTID_isDeleted:
4324 take_remote_isDeleted = true;
4325 break;
4326 default:
4327 break;
4328 }
4329 found = true;
4330 break;
4331 }
4332
4333 if (rmd->ctr.ctr1.array[i].attid != DRSUAPI_ATTID_instanceType) {
4334 DEBUG(3,("Discarding older DRS attribute update to %s on %s from %s\n",
4335 msg->elements[i-removed_attrs].name,
4336 ldb_dn_get_linearized(msg->dn),
4337 GUID_string(ar, &rmd->ctr.ctr1.array[i].originating_invocation_id)));
4338 }
4339
4340 /* we don't want to apply this change so remove the attribute */
4341 ldb_msg_remove_element(msg, &msg->elements[i-removed_attrs]);
4342 removed_attrs++;
4343
4344 found = true;
4345 break;
4346 }
4347
4348 if (found) continue;
4349
4350 nmd.ctr.ctr1.array[ni] = rmd->ctr.ctr1.array[i];
4351 if (ar->seq_num == 0) {
4352 ret = ldb_sequence_number(ldb, LDB_SEQ_NEXT, &ar->seq_num);
4353 if (ret != LDB_SUCCESS) {
4354 return replmd_replicated_request_error(ar, ret);
4355 }
4356 }
4357 nmd.ctr.ctr1.array[ni].local_usn = ar->seq_num;
4358 switch (nmd.ctr.ctr1.array[ni].attid) {
4359 case DRSUAPI_ATTID_ntSecurityDescriptor:
4360 sd_updated = true;
4361 break;
4362 case DRSUAPI_ATTID_isDeleted:
4363 take_remote_isDeleted = true;
4364 break;
4365 default:
4366 break;
4367 }
4368 ni++;
4369 }
4370
4371 /*
4372 * finally correct the size of the meta_data array
4373 */
4374 nmd.ctr.ctr1.count = ni;
4375
4376 /*
4377 * the rdn attribute (the alias for the name attribute),
4378 * 'cn' for most objects is the last entry in the meta data array
4379 * we have stored
4380 *
4381 * sort the new meta data array
4382 */
4383 ret = replmd_replPropertyMetaDataCtr1_sort(&nmd.ctr.ctr1, ar->schema, msg->dn);
4384 if (ret != LDB_SUCCESS) {
4385 return ret;
4386 }
4387
4388 /*
4389 * Work out if this object is deleted, so we can prune any extra attributes. See MS-DRSR 4.1.10.6.9
4390 * UpdateObject.
4391 *
4392 * This also controls SD propagation below
4393 */
4394 if (take_remote_isDeleted) {
4395 isDeleted = remote_isDeleted;
4396 } else {
4397 isDeleted = local_isDeleted;
4398 }
4399
4400 ar->isDeleted = isDeleted;
4401
4402 /*
4403 * check if some replicated attributes left, otherwise skip the ldb_modify() call
4404 */
4405 if (msg->num_elements == 0) {
4406 ldb_debug(ldb, LDB_DEBUG_TRACE, "replmd_replicated_apply_merge[%u]: skip replace\n",
4407 ar->index_current);
4408
4409 return replmd_replicated_apply_isDeleted(ar);
4410 }
4411
4412 ldb_debug(ldb, LDB_DEBUG_TRACE, "replmd_replicated_apply_merge[%u]: replace %u attributes\n",
4413 ar->index_current, msg->num_elements);
4414
4415 if (renamed) {
4416 sd_updated = true;
4417 }
4418
4419 if (sd_updated && !isDeleted) {
4420 ret = dsdb_module_schedule_sd_propagation(ar->module,
4421 ar->objs->partition_dn,
4422 msg->dn, true);
4423 if (ret != LDB_SUCCESS) {
4424 return ldb_operr(ldb);
4425 }
4426 }
4427
4428 /* create the meta data value */
4429 ndr_err = ndr_push_struct_blob(&nmd_value, msg, &nmd,
4430 (ndr_push_flags_fn_t)ndr_push_replPropertyMetaDataBlob);
4431 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
4432 NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
4433 return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
4434 }
4435
4436 /*
4437 * when we know that we'll modify the record, add the whenChanged, uSNChanged
4438 * and replPopertyMetaData attributes
4439 */
4440 ret = ldb_msg_add_string(msg, "whenChanged", ar->objs->objects[ar->index_current].when_changed);
4441 if (ret != LDB_SUCCESS) {
4442 return replmd_replicated_request_error(ar, ret);
4443 }
4444 ret = samdb_msg_add_uint64(ldb, msg, msg, "uSNChanged", ar->seq_num);
4445 if (ret != LDB_SUCCESS) {
4446 return replmd_replicated_request_error(ar, ret);
4447 }
4448 ret = ldb_msg_add_value(msg, "replPropertyMetaData", &nmd_value, NULL);
4449 if (ret != LDB_SUCCESS) {
4450 return replmd_replicated_request_error(ar, ret);
4451 }
4452
4453 replmd_ldb_message_sort(msg, ar->schema);
4454
4455 /* we want to replace the old values */
4456 for (i=0; i < msg->num_elements; i++) {
4457 msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
4458 }
4459
4460 if (DEBUGLVL(4)) {
4461 char *s = ldb_ldif_message_string(ldb, ar, LDB_CHANGETYPE_MODIFY, msg);
4462 DEBUG(4, ("DRS replication modify message:\n%s\n", s));
4463 talloc_free(s);
4464 }
4465
4466 ret = ldb_build_mod_req(&change_req,
4467 ldb,
4468 ar,
4469 msg,
4470 ar->controls,
4471 ar,
4472 callback,
4473 ar->req);
4474 LDB_REQ_SET_LOCATION(change_req);
4475 if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
4476
4477 /* current partition control needed by "repmd_op_callback" */
4478 ret = ldb_request_add_control(change_req,
4479 DSDB_CONTROL_CURRENT_PARTITION_OID,
4480 false, NULL);
4481 if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
4482
4483 return ldb_next_request(ar->module, change_req);
4484 }
4485
4486 static int replmd_replicated_apply_search_callback(struct ldb_request *req,
4487 struct ldb_reply *ares)
4488 {
4489 struct replmd_replicated_request *ar = talloc_get_type(req->context,
4490 struct replmd_replicated_request);
4491 int ret;
4492
4493 if (!ares) {
4494 return ldb_module_done(ar->req, NULL, NULL,
4495 LDB_ERR_OPERATIONS_ERROR);
4496 }
4497 if (ares->error != LDB_SUCCESS &&
4498 ares->error != LDB_ERR_NO_SUCH_OBJECT) {
4499 return ldb_module_done(ar->req, ares->controls,
4500 ares->response, ares->error);
4501 }
4502
4503 switch (ares->type) {
4504 case LDB_REPLY_ENTRY:
4505 ar->search_msg = talloc_steal(ar, ares->message);
4506 break;
4507
4508 case LDB_REPLY_REFERRAL:
4509 /* we ignore referrals */
4510 break;
4511
4512 case LDB_REPLY_DONE:
4513 {
4514 struct replPropertyMetaData1 *md_remote;
4515 struct replPropertyMetaData1 *md_local;
4516
4517 struct replPropertyMetaDataBlob omd;
4518 const struct ldb_val *omd_value;
4519 struct replPropertyMetaDataBlob *rmd;
4520 struct ldb_message *msg;
4521
4522 ar->objs->objects[ar->index_current].last_known_parent = NULL;
4523
4524 /*
4525 * This is the ADD case, find the appropriate parent,
4526 * as this object doesn't exist locally:
4527 */
4528 if (ar->search_msg == NULL) {
4529 ret = replmd_replicated_apply_search_for_parent(ar);
4530 if (ret != LDB_SUCCESS) {
4531 return ldb_module_done(ar->req, NULL, NULL, ret);
4532 }
4533 talloc_free(ares);
4534 return LDB_SUCCESS;
4535 }
4536
4537 /*
4538 * Otherwise, in the MERGE case, work out if we are
4539 * attempting a rename, and if so find the parent the
4540 * newly renamed object wants to belong under (which
4541 * may not be the parent in it's attached string DN
4542 */
4543 rmd = ar->objs->objects[ar->index_current].meta_data;
4544 ZERO_STRUCT(omd);
4545 omd.version = 1;
4546
4547 /* find existing meta data */
4548 omd_value = ldb_msg_find_ldb_val(ar->search_msg, "replPropertyMetaData");
4549 if (omd_value) {
4550 enum ndr_err_code ndr_err;
4551 ndr_err = ndr_pull_struct_blob(omd_value, ar, &omd,
4552 (ndr_pull_flags_fn_t)ndr_pull_replPropertyMetaDataBlob);
4553 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
4554 NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
4555 return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
4556 }
4557
4558 if (omd.version != 1) {
4559 return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
4560 }
4561 }
4562
4563 /*
4564 * now we need to check for double renames. We could have a
4565 * local rename pending which our replication partner hasn't
4566 * received yet. We choose which one wins by looking at the
4567 * attribute stamps on the two objects, the newer one wins
4568 */
4569 md_remote = replmd_replPropertyMetaData1_find_attid(rmd, DRSUAPI_ATTID_name);
4570 md_local = replmd_replPropertyMetaData1_find_attid(&omd, DRSUAPI_ATTID_name);
4571 /* if there is no name attribute then we have to assume the
4572 object we've received is in fact newer */
4573 if (ar->objs->dsdb_repl_flags & DSDB_REPL_FLAG_PRIORITISE_INCOMING ||
4574 !md_remote || !md_local ||
4575 replmd_replPropertyMetaData1_is_newer(md_local, md_remote)) {
4576 ret = replmd_replicated_apply_search_for_parent(ar);
4577 } else {
4578 msg = ar->objs->objects[ar->index_current].msg;
4579
4580 /* Otherwise, just merge on the existing object, force no rename */
4581 DEBUG(4,(__location__ ": Keeping object %s and rejecting older rename to %s\n",
4582 ldb_dn_get_linearized(ar->search_msg->dn),
4583 ldb_dn_get_linearized(msg->dn)));
4584
4585 /*
4586 * This assignment ensures that the strcmp()
4587 * in replmd_replicated_apply_merge() avoids
4588 * the rename call
4589 */
4590 msg->dn = ar->search_msg->dn;
4591 ret = replmd_replicated_apply_merge(ar);
4592 }
4593 if (ret != LDB_SUCCESS) {
4594 return ldb_module_done(ar->req, NULL, NULL, ret);
4595 }
4596 }
4597 }
4598
4599 talloc_free(ares);
4600 return LDB_SUCCESS;
4601 }
4602
4603 static int replmd_replicated_uptodate_vector(struct replmd_replicated_request *ar);
4604
4605 static int replmd_replicated_apply_next(struct replmd_replicated_request *ar)
4606 {
4607 struct ldb_context *ldb;
4608 int ret;
4609 char *tmp_str;
4610 char *filter;
4611 struct ldb_request *search_req;
4612
4613 if (ar->index_current >= ar->objs->num_objects) {
4614 /* done with it, go to next stage */
4615 return replmd_replicated_uptodate_vector(ar);
4616 }
4617
4618 ldb = ldb_module_get_ctx(ar->module);
4619 ar->search_msg = NULL;
4620 ar->isDeleted = false;
4621
4622 tmp_str = ldb_binary_encode(ar, ar->objs->objects[ar->index_current].guid_value);
4623 if (!tmp_str) return replmd_replicated_request_werror(ar, WERR_NOMEM);
4624
4625 filter = talloc_asprintf(ar, "(objectGUID=%s)", tmp_str);
4626 if (!filter) return replmd_replicated_request_werror(ar, WERR_NOMEM);
4627 talloc_free(tmp_str);
4628
4629 ret = ldb_build_search_req(&search_req,
4630 ldb,
4631 ar,
4632 NULL,
4633 LDB_SCOPE_SUBTREE,
4634 filter,
4635 NULL,
4636 NULL,
4637 ar,
4638 replmd_replicated_apply_search_callback,
4639 ar->req);
4640 LDB_REQ_SET_LOCATION(search_req);
4641
4642 ret = dsdb_request_add_controls(search_req, DSDB_SEARCH_SEARCH_ALL_PARTITIONS|DSDB_SEARCH_SHOW_RECYCLED);
4643
4644 if (ret != LDB_SUCCESS) {
4645 return ret;
4646 }
4647
4648 return ldb_next_request(ar->module, search_req);
4649 }
4650
4651 /*
4652 * This is essentially a wrapper for replmd_replicated_apply_next()
4653 *
4654 * This is needed to ensure that both codepaths call this handler.
4655 */
4656 static int replmd_replicated_apply_isDeleted(struct replmd_replicated_request *ar)
4657 {
4658 if (ar->isDeleted) {
4659 /*
4660 * Do a delete here again, so that if there is
4661 * anything local that conflicts with this
4662 * object being deleted, it is removed. This
4663 * includes links. See MS-DRSR 4.1.10.6.9
4664 * UpdateObject.
4665 *
4666 * If the object is already deleted, and there
4667 * is no more work required, it doesn't do
4668 * anything.
4669 */
4670
4671 /* This has been updated to point to the DN we eventually did the modify on */
4672 struct ldb_message *msg = ar->objs->objects[ar->index_current].msg;
4673
4674 struct ldb_request *del_req;
4675 struct ldb_result *res;
4676 int ret;
4677
4678 TALLOC_CTX *tmp_ctx = talloc_new(ar);
4679 if (!tmp_ctx) {
4680 ret = ldb_oom(ldb_module_get_ctx(ar->module));
4681 return ret;
4682 }
4683
4684 res = talloc_zero(tmp_ctx, struct ldb_result);
4685 if (!res) {
4686 ret = ldb_oom(ldb_module_get_ctx(ar->module));
4687 talloc_free(tmp_ctx);
4688 return ret;
4689 }
4690
4691 /* Build a delete request, which hopefully will artually turn into nothing */
4692 ret = ldb_build_del_req(&del_req, ldb_module_get_ctx(ar->module), tmp_ctx,
4693 msg->dn,
4694 NULL,
4695 res,
4696 ldb_modify_default_callback,
4697 ar->req);
4698 LDB_REQ_SET_LOCATION(del_req);
4699 if (ret != LDB_SUCCESS) {
4700 talloc_free(tmp_ctx);
4701 return ret;
4702 }
4703
4704 /*
4705 * This is the guts of the call, call back
4706 * into our delete code, but setting the
4707 * re_delete flag so we delete anything that
4708 * shouldn't be there on a deleted or recycled
4709 * object
4710 */
4711 ret = replmd_delete_internals(ar->module, del_req, true);
4712 if (ret == LDB_SUCCESS) {
4713 ret = ldb_wait(del_req->handle, LDB_WAIT_ALL);
4714 }
4715
4716 talloc_free(tmp_ctx);
4717 if (ret != LDB_SUCCESS) {
4718 return ret;
4719 }
4720 }
4721
4722 ar->index_current++;
4723 return replmd_replicated_apply_next(ar);
4724 }
4725
4726 static int replmd_replicated_uptodate_modify_callback(struct ldb_request *req,
4727 struct ldb_reply *ares)
4728 {
4729 struct ldb_context *ldb;
4730 struct replmd_replicated_request *ar = talloc_get_type(req->context,
4731 struct replmd_replicated_request);
4732 ldb = ldb_module_get_ctx(ar->module);
4733
4734 if (!ares) {
4735 return ldb_module_done(ar->req, NULL, NULL,
4736 LDB_ERR_OPERATIONS_ERROR);
4737 }
4738 if (ares->error != LDB_SUCCESS) {
4739 return ldb_module_done(ar->req, ares->controls,
4740 ares->response, ares->error);
4741 }
4742
4743 if (ares->type != LDB_REPLY_DONE) {
4744 ldb_asprintf_errstring(ldb, "Invalid LDB reply type %d", ares->type);
4745 return ldb_module_done(ar->req, NULL, NULL,
4746 LDB_ERR_OPERATIONS_ERROR);
4747 }
4748
4749 talloc_free(ares);
4750
4751 return ldb_module_done(ar->req, NULL, NULL, LDB_SUCCESS);
4752 }
4753
4754 static int replmd_replicated_uptodate_modify(struct replmd_replicated_request *ar)
4755 {
4756 struct ldb_context *ldb;
4757 struct ldb_request *change_req;
4758 enum ndr_err_code ndr_err;
4759 struct ldb_message *msg;
4760 struct replUpToDateVectorBlob ouv;
4761 const struct ldb_val *ouv_value;
4762 const struct drsuapi_DsReplicaCursor2CtrEx *ruv;
4763 struct replUpToDateVectorBlob nuv;
4764 struct ldb_val nuv_value;
4765 struct ldb_message_element *nuv_el = NULL;
4766 const struct GUID *our_invocation_id;
4767 struct ldb_message_element *orf_el = NULL;
4768 struct repsFromToBlob nrf;
4769 struct ldb_val *nrf_value = NULL;
4770 struct ldb_message_element *nrf_el = NULL;
4771 unsigned int i;
4772 uint32_t j,ni=0;
4773 bool found = false;
4774 time_t t = time(NULL);
4775 NTTIME now;
4776 int ret;
4777 uint32_t instanceType;
4778
4779 ldb = ldb_module_get_ctx(ar->module);
4780 ruv = ar->objs->uptodateness_vector;
4781 ZERO_STRUCT(ouv);
4782 ouv.version = 2;
4783 ZERO_STRUCT(nuv);
4784 nuv.version = 2;
4785
4786 unix_to_nt_time(&now, t);
4787
4788 if (ar->search_msg == NULL) {
4789 /* this happens for a REPL_OBJ call where we are
4790 creating the target object by replicating it. The
4791 subdomain join code does this for the partition DN
4792 */
4793 DEBUG(4,(__location__ ": Skipping UDV and repsFrom update as no target DN\n"));
4794 return ldb_module_done(ar->req, NULL, NULL, LDB_SUCCESS);
4795 }
4796
4797 instanceType = ldb_msg_find_attr_as_uint(ar->search_msg, "instanceType", 0);
4798 if (! (instanceType & INSTANCE_TYPE_IS_NC_HEAD)) {
4799 DEBUG(4,(__location__ ": Skipping UDV and repsFrom update as not NC root: %s\n",
4800 ldb_dn_get_linearized(ar->search_msg->dn)));
4801 return ldb_module_done(ar->req, NULL, NULL, LDB_SUCCESS);
4802 }
4803
4804 /*
4805 * first create the new replUpToDateVector
4806 */
4807 ouv_value = ldb_msg_find_ldb_val(ar->search_msg, "replUpToDateVector");
4808 if (ouv_value) {
4809 ndr_err = ndr_pull_struct_blob(ouv_value, ar, &ouv,
4810 (ndr_pull_flags_fn_t)ndr_pull_replUpToDateVectorBlob);
4811 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
4812 NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
4813 return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
4814 }
4815
4816 if (ouv.version != 2) {
4817 return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
4818 }
4819 }
4820
4821 /*
4822 * the new uptodateness vector will at least
4823 * contain 1 entry, one for the source_dsa
4824 *
4825 * plus optional values from our old vector and the one from the source_dsa
4826 */
4827 nuv.ctr.ctr2.count = ouv.ctr.ctr2.count;
4828 if (ruv) nuv.ctr.ctr2.count += ruv->count;
4829 nuv.ctr.ctr2.cursors = talloc_array(ar,
4830 struct drsuapi_DsReplicaCursor2,
4831 nuv.ctr.ctr2.count);
4832 if (!nuv.ctr.ctr2.cursors) return replmd_replicated_request_werror(ar, WERR_NOMEM);
4833
4834 /* first copy the old vector */
4835 for (i=0; i < ouv.ctr.ctr2.count; i++) {
4836 nuv.ctr.ctr2.cursors[ni] = ouv.ctr.ctr2.cursors[i];
4837 ni++;
4838 }
4839
4840 /* get our invocation_id if we have one already attached to the ldb */
4841 our_invocation_id = samdb_ntds_invocation_id(ldb);
4842
4843 /* merge in the source_dsa vector is available */
4844 for (i=0; (ruv && i < ruv->count); i++) {
4845 found = false;
4846
4847 if (our_invocation_id &&
4848 GUID_equal(&ruv->cursors[i].source_dsa_invocation_id,
4849 our_invocation_id)) {
4850 continue;
4851 }
4852
4853 for (j=0; j < ni; j++) {
4854 if (!GUID_equal(&ruv->cursors[i].source_dsa_invocation_id,
4855 &nuv.ctr.ctr2.cursors[j].source_dsa_invocation_id)) {
4856 continue;
4857 }
4858
4859 found = true;
4860
4861 if (ruv->cursors[i].highest_usn > nuv.ctr.ctr2.cursors[j].highest_usn) {
4862 nuv.ctr.ctr2.cursors[j] = ruv->cursors[i];
4863 }
4864 break;
4865 }
4866
4867 if (found) continue;
4868
4869 /* if it's not there yet, add it */
4870 nuv.ctr.ctr2.cursors[ni] = ruv->cursors[i];
4871 ni++;
4872 }
4873
4874 /*
4875 * finally correct the size of the cursors array
4876 */
4877 nuv.ctr.ctr2.count = ni;
4878
4879 /*
4880 * sort the cursors
4881 */
4882 TYPESAFE_QSORT(nuv.ctr.ctr2.cursors, nuv.ctr.ctr2.count, drsuapi_DsReplicaCursor2_compare);
4883
4884 /*
4885 * create the change ldb_message
4886 */
4887 msg = ldb_msg_new(ar);
4888 if (!msg) return replmd_replicated_request_werror(ar, WERR_NOMEM);
4889 msg->dn = ar->search_msg->dn;
4890
4891 ndr_err = ndr_push_struct_blob(&nuv_value, msg, &nuv,
4892 (ndr_push_flags_fn_t)ndr_push_replUpToDateVectorBlob);
4893 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
4894 NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
4895 return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
4896 }
4897 ret = ldb_msg_add_value(msg, "replUpToDateVector", &nuv_value, &nuv_el);
4898 if (ret != LDB_SUCCESS) {
4899 return replmd_replicated_request_error(ar, ret);
4900 }
4901 nuv_el->flags = LDB_FLAG_MOD_REPLACE;
4902
4903 /*
4904 * now create the new repsFrom value from the given repsFromTo1 structure
4905 */
4906 ZERO_STRUCT(nrf);
4907 nrf.version = 1;
4908 nrf.ctr.ctr1 = *ar->objs->source_dsa;
4909 nrf.ctr.ctr1.last_attempt = now;
4910 nrf.ctr.ctr1.last_success = now;
4911 nrf.ctr.ctr1.result_last_attempt = WERR_OK;
4912
4913 /*
4914 * first see if we already have a repsFrom value for the current source dsa
4915 * if so we'll later replace this value
4916 */
4917 orf_el = ldb_msg_find_element(ar->search_msg, "repsFrom");
4918 if (orf_el) {
4919 for (i=0; i < orf_el->num_values; i++) {
4920 struct repsFromToBlob *trf;
4921
4922 trf = talloc(ar, struct repsFromToBlob);
4923 if (!trf) return replmd_replicated_request_werror(ar, WERR_NOMEM);
4924
4925 ndr_err = ndr_pull_struct_blob(&orf_el->values[i], trf, trf,
4926 (ndr_pull_flags_fn_t)ndr_pull_repsFromToBlob);
4927 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
4928 NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
4929 return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
4930 }
4931
4932 if (trf->version != 1) {
4933 return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
4934 }
4935
4936 /*
4937 * we compare the source dsa objectGUID not the invocation_id
4938 * because we want only one repsFrom value per source dsa
4939 * and when the invocation_id of the source dsa has changed we don't need
4940 * the old repsFrom with the old invocation_id
4941 */
4942 if (!GUID_equal(&trf->ctr.ctr1.source_dsa_obj_guid,
4943 &ar->objs->source_dsa->source_dsa_obj_guid)) {
4944 talloc_free(trf);
4945 continue;
4946 }
4947
4948 talloc_free(trf);
4949 nrf_value = &orf_el->values[i];
4950 break;
4951 }
4952
4953 /*
4954 * copy over all old values to the new ldb_message
4955 */
4956 ret = ldb_msg_add_empty(msg, "repsFrom", 0, &nrf_el);
4957 if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
4958 *nrf_el = *orf_el;
4959 }
4960
4961 /*
4962 * if we haven't found an old repsFrom value for the current source dsa
4963 * we'll add a new value
4964 */
4965 if (!nrf_value) {
4966 struct ldb_val zero_value;
4967 ZERO_STRUCT(zero_value);
4968 ret = ldb_msg_add_value(msg, "repsFrom", &zero_value, &nrf_el);
4969 if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
4970
4971 nrf_value = &nrf_el->values[nrf_el->num_values - 1];
4972 }
4973
4974 /* we now fill the value which is already attached to ldb_message */
4975 ndr_err = ndr_push_struct_blob(nrf_value, msg,
4976 &nrf,
4977 (ndr_push_flags_fn_t)ndr_push_repsFromToBlob);
4978 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
4979 NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
4980 return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
4981 }
4982
4983 /*
4984 * the ldb_message_element for the attribute, has all the old values and the new one
4985 * so we'll replace the whole attribute with all values
4986 */
4987 nrf_el->flags = LDB_FLAG_MOD_REPLACE;
4988
4989 if (CHECK_DEBUGLVL(4)) {
4990 char *s = ldb_ldif_message_string(ldb, ar, LDB_CHANGETYPE_MODIFY, msg);
4991 DEBUG(4, ("DRS replication uptodate modify message:\n%s\n", s));
4992 talloc_free(s);
4993 }
4994
4995 /* prepare the ldb_modify() request */
4996 ret = ldb_build_mod_req(&change_req,
4997 ldb,
4998 ar,
4999 msg,
5000 ar->controls,
5001 ar,
5002 replmd_replicated_uptodate_modify_callback,
5003 ar->req);
5004 LDB_REQ_SET_LOCATION(change_req);
5005 if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
5006
5007 return ldb_next_request(ar->module, change_req);
5008 }
5009
5010 static int replmd_replicated_uptodate_search_callback(struct ldb_request *req,
5011 struct ldb_reply *ares)
5012 {
5013 struct replmd_replicated_request *ar = talloc_get_type(req->context,
5014 struct replmd_replicated_request);
5015 int ret;
5016
5017 if (!ares) {
5018 return ldb_module_done(ar->req, NULL, NULL,
5019 LDB_ERR_OPERATIONS_ERROR);
5020 }
5021 if (ares->error != LDB_SUCCESS &&
5022 ares->error != LDB_ERR_NO_SUCH_OBJECT) {
5023 return ldb_module_done(ar->req, ares->controls,
5024 ares->response, ares->error);
5025 }
5026
5027 switch (ares->type) {
5028 case LDB_REPLY_ENTRY:
5029 ar->search_msg = talloc_steal(ar, ares->message);
5030 break;
5031
5032 case LDB_REPLY_REFERRAL:
5033 /* we ignore referrals */
5034 break;
5035
5036 case LDB_REPLY_DONE:
5037 ret = replmd_replicated_uptodate_modify(ar);
5038 if (ret != LDB_SUCCESS) {
5039 return ldb_module_done(ar->req, NULL, NULL, ret);
5040 }
5041 }
5042
5043 talloc_free(ares);
5044 return LDB_SUCCESS;
5045 }
5046
5047
5048 static int replmd_replicated_uptodate_vector(struct replmd_replicated_request *ar)
5049 {
5050 struct ldb_context *ldb;
5051 int ret;
5052 static const char *attrs[] = {
5053 "replUpToDateVector",
5054 "repsFrom",
5055 "instanceType",
5056 NULL
5057 };
5058 struct ldb_request *search_req;
5059
5060 ldb = ldb_module_get_ctx(ar->module);
5061 ar->search_msg = NULL;
5062
5063 ret = ldb_build_search_req(&search_req,
5064 ldb,
5065 ar,
5066 ar->objs->partition_dn,
5067 LDB_SCOPE_BASE,
5068 "(objectClass=*)",
5069 attrs,
5070 NULL,
5071 ar,
5072 replmd_replicated_uptodate_search_callback,
5073 ar->req);
5074 LDB_REQ_SET_LOCATION(search_req);
5075 if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
5076
5077 return ldb_next_request(ar->module, search_req);
5078 }
5079
5080
5081
5082 static int replmd_extended_replicated_objects(struct ldb_module *module, struct ldb_request *req)
5083 {
5084 struct ldb_context *ldb;
5085 struct dsdb_extended_replicated_objects *objs;
5086 struct replmd_replicated_request *ar;
5087 struct ldb_control **ctrls;
5088 int ret;
5089 uint32_t i;
5090 struct replmd_private *replmd_private =
5091 talloc_get_type(ldb_module_get_private(module), struct replmd_private);
5092 struct dsdb_control_replicated_update *rep_update;
5093
5094 ldb = ldb_module_get_ctx(module);
5095
5096 ldb_debug(ldb, LDB_DEBUG_TRACE, "replmd_extended_replicated_objects\n");
5097
5098 objs = talloc_get_type(req->op.extended.data, struct dsdb_extended_replicated_objects);
5099 if (!objs) {
5100 ldb_debug(ldb, LDB_DEBUG_FATAL, "replmd_extended_replicated_objects: invalid extended data\n");
5101 return LDB_ERR_PROTOCOL_ERROR;
5102 }
5103
5104 if (objs->version != DSDB_EXTENDED_REPLICATED_OBJECTS_VERSION) {
5105 ldb_debug(ldb, LDB_DEBUG_FATAL, "replmd_extended_replicated_objects: extended data invalid version [%u != %u]\n",
5106 objs->version, DSDB_EXTENDED_REPLICATED_OBJECTS_VERSION);
5107 return LDB_ERR_PROTOCOL_ERROR;
5108 }
5109
5110 ar = replmd_ctx_init(module, req);
5111 if (!ar)
5112 return LDB_ERR_OPERATIONS_ERROR;
5113
5114 /* Set the flags to have the replmd_op_callback run over the full set of objects */
5115 ar->apply_mode = true;
5116 ar->objs = objs;
5117 ar->schema = dsdb_get_schema(ldb, ar);
5118 if (!ar->schema) {
5119 ldb_debug_set(ldb, LDB_DEBUG_FATAL, "replmd_ctx_init: no loaded schema found\n");
5120 talloc_free(ar);
5121 DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
5122 return LDB_ERR_CONSTRAINT_VIOLATION;
5123 }
5124
5125 ctrls = req->controls;
5126
5127 if (req->controls) {
5128 req->controls = talloc_memdup(ar, req->controls,
5129 talloc_get_size(req->controls));
5130 if (!req->controls) return replmd_replicated_request_werror(ar, WERR_NOMEM);
5131 }
5132
5133 /* This allows layers further down to know if a change came in
5134 over replication and what the replication flags were */
5135 rep_update = talloc_zero(ar, struct dsdb_control_replicated_update);
5136 if (rep_update == NULL) {
5137 return ldb_module_oom(module);
5138 }
5139 rep_update->dsdb_repl_flags = objs->dsdb_repl_flags;
5140
5141 ret = ldb_request_add_control(req, DSDB_CONTROL_REPLICATED_UPDATE_OID, false, rep_update);
5142 if (ret != LDB_SUCCESS) {
5143 return ret;
5144 }
5145
5146 /* If this change contained linked attributes in the body
5147 * (rather than in the links section) we need to update
5148 * backlinks in linked_attributes */
5149 ret = ldb_request_add_control(req, DSDB_CONTROL_APPLY_LINKS, false, NULL);
5150 if (ret != LDB_SUCCESS) {
5151 return ret;
5152 }
5153
5154 ar->controls = req->controls;
5155 req->controls = ctrls;
5156
5157 DEBUG(4,("linked_attributes_count=%u\n", objs->linked_attributes_count));
5158
5159 /* save away the linked attributes for the end of the
5160 transaction */
5161 for (i=0; i<ar->objs->linked_attributes_count; i++) {
5162 struct la_entry *la_entry;
5163
5164 if (replmd_private->la_ctx == NULL) {
5165 replmd_private->la_ctx = talloc_new(replmd_private);
5166 }
5167 la_entry = talloc(replmd_private->la_ctx, struct la_entry);
5168 if (la_entry == NULL) {
5169 ldb_oom(ldb);
5170 return LDB_ERR_OPERATIONS_ERROR;
5171 }
5172 la_entry->la = talloc(la_entry, struct drsuapi_DsReplicaLinkedAttribute);
5173 if (la_entry->la == NULL) {
5174 talloc_free(la_entry);
5175 ldb_oom(ldb);
5176 return LDB_ERR_OPERATIONS_ERROR;
5177 }
5178 *la_entry->la = ar->objs->linked_attributes[i];
5179
5180 /* we need to steal the non-scalars so they stay
5181 around until the end of the transaction */
5182 talloc_steal(la_entry->la, la_entry->la->identifier);
5183 talloc_steal(la_entry->la, la_entry->la->value.blob);
5184
5185 DLIST_ADD(replmd_private->la_list, la_entry);
5186 }
5187
5188 return replmd_replicated_apply_next(ar);
5189 }
5190
5191 /*
5192 process one linked attribute structure
5193 */
5194 static int replmd_process_linked_attribute(struct ldb_module *module,
5195 struct la_entry *la_entry,
5196 struct ldb_request *parent)
5197 {
5198 struct drsuapi_DsReplicaLinkedAttribute *la = la_entry->la;
5199 struct ldb_context *ldb = ldb_module_get_ctx(module);
5200 struct ldb_message *msg;
5201 struct ldb_message *target_msg = NULL;
5202 TALLOC_CTX *tmp_ctx = talloc_new(la_entry);
5203 const struct dsdb_schema *schema = dsdb_get_schema(ldb, tmp_ctx);
5204 int ret;
5205 const struct dsdb_attribute *attr;
5206 struct dsdb_dn *dsdb_dn;
5207 uint64_t seq_num = 0;
5208 struct ldb_message_element *old_el;
5209 WERROR status;
5210 time_t t = time(NULL);
5211 struct ldb_result *res;
5212 struct ldb_result *target_res;
5213 const char *attrs[4];
5214 const char *attrs2[] = { "isDeleted", "isRecycled", NULL };
5215 struct parsed_dn *pdn_list, *pdn;
5216 struct GUID guid = GUID_zero();
5217 NTSTATUS ntstatus;
5218 bool active = (la->flags & DRSUAPI_DS_LINKED_ATTRIBUTE_FLAG_ACTIVE)?true:false;
5219 const struct GUID *our_invocation_id;
5220
5221 enum deletion_state deletion_state = OBJECT_NOT_DELETED;
5222 enum deletion_state target_deletion_state = OBJECT_NOT_DELETED;
5223
5224 /*
5225 linked_attributes[0]:
5226 &objs->linked_attributes[i]: struct drsuapi_DsReplicaLinkedAttribute
5227 identifier : *
5228 identifier: struct drsuapi_DsReplicaObjectIdentifier
5229 __ndr_size : 0x0000003a (58)
5230 __ndr_size_sid : 0x00000000 (0)
5231 guid : 8e95b6a9-13dd-4158-89db-3220a5be5cc7
5232 sid : S-0-0
5233 __ndr_size_dn : 0x00000000 (0)
5234 dn : ''
5235 attid : DRSUAPI_ATTID_member (0x1F)
5236 value: struct drsuapi_DsAttributeValue
5237 __ndr_size : 0x0000007e (126)
5238 blob : *
5239 blob : DATA_BLOB length=126
5240 flags : 0x00000001 (1)
5241 1: DRSUAPI_DS_LINKED_ATTRIBUTE_FLAG_ACTIVE
5242 originating_add_time : Wed Sep 2 22:20:01 2009 EST
5243 meta_data: struct drsuapi_DsReplicaMetaData
5244 version : 0x00000015 (21)
5245 originating_change_time : Wed Sep 2 23:39:07 2009 EST
5246 originating_invocation_id: 794640f3-18cf-40ee-a211-a93992b67a64
5247 originating_usn : 0x000000000001e19c (123292)
5248
5249 (for cases where the link is to a normal DN)
5250 &target: struct drsuapi_DsReplicaObjectIdentifier3
5251 __ndr_size : 0x0000007e (126)
5252 __ndr_size_sid : 0x0000001c (28)
5253 guid : 7639e594-db75-4086-b0d4-67890ae46031
5254 sid : S-1-5-21-2848215498-2472035911-1947525656-19924
5255 __ndr_size_dn : 0x00000022 (34)
5256 dn : 'CN=UOne,OU=TestOU,DC=vsofs8,DC=com'
5257 */
5258
5259 /* find the attribute being modified */
5260 attr = dsdb_attribute_by_attributeID_id(schema, la->attid);
5261 if (attr == NULL) {
5262 DEBUG(0, (__location__ ": Unable to find attributeID 0x%x\n", la->attid));
5263 talloc_free(tmp_ctx);
5264 return LDB_ERR_OPERATIONS_ERROR;
5265 }
5266
5267 attrs[0] = attr->lDAPDisplayName;
5268 attrs[1] = "isDeleted";
5269 attrs[1] = "isRecycled";
5270 attrs[2] = NULL;
5271
5272 /* get the existing message from the db for the object with
5273 this GUID, returning attribute being modified. We will then
5274 use this msg as the basis for a modify call */
5275 ret = dsdb_module_search(module, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE, attrs,
5276 DSDB_FLAG_NEXT_MODULE |
5277 DSDB_SEARCH_SEARCH_ALL_PARTITIONS |
5278 DSDB_SEARCH_SHOW_RECYCLED |
5279 DSDB_SEARCH_SHOW_DN_IN_STORAGE_FORMAT |
5280 DSDB_SEARCH_REVEAL_INTERNALS,
5281 parent,
5282 "objectGUID=%s", GUID_string(tmp_ctx, &la->identifier->guid));
5283 if (ret != LDB_SUCCESS) {
5284 talloc_free(tmp_ctx);
5285 return ret;
5286 }
5287 if (res->count != 1) {
5288 ldb_asprintf_errstring(ldb, "DRS linked attribute for GUID %s - DN not found",
5289 GUID_string(tmp_ctx, &la->identifier->guid));
5290 talloc_free(tmp_ctx);
5291 return LDB_ERR_NO_SUCH_OBJECT;
5292 }
5293 msg = res->msgs[0];
5294
5295 /*
5296 * Check for deleted objects per MS-DRSR 4.1.10.6.13
5297 * ProcessLinkValue, because link updates are not applied to
5298 * recycled and tombstone objects. We don't have to delete
5299 * any existing link, that should have happened when the
5300 * object deletion was replicated or initiated.
5301 */
5302
5303 replmd_deletion_state(module, msg, &deletion_state, NULL);
5304
5305 if (deletion_state >= OBJECT_RECYCLED) {
5306 talloc_free(tmp_ctx);
5307 return LDB_SUCCESS;
5308 }
5309
5310 old_el = ldb_msg_find_element(msg, attr->lDAPDisplayName);
5311 if (old_el == NULL) {
5312 ret = ldb_msg_add_empty(msg, attr->lDAPDisplayName, LDB_FLAG_MOD_REPLACE, &old_el);
5313 if (ret != LDB_SUCCESS) {
5314 ldb_module_oom(module);
5315 talloc_free(tmp_ctx);
5316 return LDB_ERR_OPERATIONS_ERROR;
5317 }
5318 } else {
5319 old_el->flags = LDB_FLAG_MOD_REPLACE;
5320 }
5321
5322 /* parse the existing links */
5323 ret = get_parsed_dns(module, tmp_ctx, old_el, &pdn_list, attr->syntax->ldap_oid, parent);
5324 if (ret != LDB_SUCCESS) {
5325 talloc_free(tmp_ctx);
5326 return ret;
5327 }
5328
5329 /* get our invocationId */
5330 our_invocation_id = samdb_ntds_invocation_id(ldb);
5331 if (!our_invocation_id) {
5332 ldb_debug_set(ldb, LDB_DEBUG_ERROR, __location__ ": unable to find invocationId\n");
5333 talloc_free(tmp_ctx);
5334 return LDB_ERR_OPERATIONS_ERROR;
5335 }
5336
5337 ret = replmd_check_upgrade_links(pdn_list, old_el->num_values, old_el, our_invocation_id);
5338 if (ret != LDB_SUCCESS) {
5339 talloc_free(tmp_ctx);
5340 return ret;
5341 }
5342
5343 status = dsdb_dn_la_from_blob(ldb, attr, schema, tmp_ctx, la->value.blob, &dsdb_dn);
5344 if (!W_ERROR_IS_OK(status)) {
5345 ldb_asprintf_errstring(ldb, "Failed to parsed linked attribute blob for %s on %s - %s\n",
5346 old_el->name, ldb_dn_get_linearized(msg->dn), win_errstr(status));
5347 talloc_free(tmp_ctx);
5348 return LDB_ERR_OPERATIONS_ERROR;
5349 }
5350
5351 ntstatus = dsdb_get_extended_dn_guid(dsdb_dn->dn, &guid, "GUID");
5352 if (!NT_STATUS_IS_OK(ntstatus) && !active) {
5353 /*
5354 * This strange behaviour (allowing a NULL/missing
5355 * GUID) originally comes from:
5356 *
5357 * commit e3054ce0fe0f8f62d2f5b2a77893e7a1479128bd
5358 * Author: Andrew Tridgell <tridge@samba.org>
5359 * Date: Mon Dec 21 21:21:55 2009 +1100
5360 *
5361 * s4-drs: cope better with NULL GUIDS from DRS
5362 *
5363 * It is valid to get a NULL GUID over DRS for a deleted forward link. We
5364 * need to match by DN if possible when seeing if we should update an
5365 * existing link.
5366 *
5367 * Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>
5368 */
5369
5370 ret = dsdb_module_search_dn(module, tmp_ctx, &target_res,
5371 dsdb_dn->dn, attrs2,
5372 DSDB_FLAG_NEXT_MODULE |
5373 DSDB_SEARCH_SHOW_RECYCLED |
5374 DSDB_SEARCH_SEARCH_ALL_PARTITIONS |
5375 DSDB_SEARCH_SHOW_DN_IN_STORAGE_FORMAT,
5376 parent);
5377 } else if (!NT_STATUS_IS_OK(ntstatus)) {
5378 ldb_asprintf_errstring(ldb, "Failed to find GUID in linked attribute blob for %s on %s from %s",
5379 old_el->name,
5380 ldb_dn_get_linearized(dsdb_dn->dn),
5381 ldb_dn_get_linearized(msg->dn));
5382 talloc_free(tmp_ctx);
5383 return LDB_ERR_OPERATIONS_ERROR;
5384 } else {
5385 ret = dsdb_module_search(module, tmp_ctx, &target_res,
5386 NULL, LDB_SCOPE_SUBTREE,
5387 attrs2,
5388 DSDB_FLAG_NEXT_MODULE |
5389 DSDB_SEARCH_SHOW_RECYCLED |
5390 DSDB_SEARCH_SEARCH_ALL_PARTITIONS |
5391 DSDB_SEARCH_SHOW_DN_IN_STORAGE_FORMAT,
5392 parent,
5393 "objectGUID=%s",
5394 GUID_string(tmp_ctx, &guid));
5395 }
5396
5397 if (ret != LDB_SUCCESS) {
5398 ldb_asprintf_errstring(ldb_module_get_ctx(module), "Failed to re-resolve GUID %s: %s\n",
5399 GUID_string(tmp_ctx, &guid),
5400 ldb_errstring(ldb_module_get_ctx(module)));
5401 talloc_free(tmp_ctx);
5402 return ret;
5403 }
5404
5405 if (target_res->count == 0) {
5406 DEBUG(2,(__location__ ": WARNING: Failed to re-resolve GUID %s - using %s\n",
5407 GUID_string(tmp_ctx, &guid),
5408 ldb_dn_get_linearized(dsdb_dn->dn)));
5409 } else if (target_res->count != 1) {
5410 ldb_asprintf_errstring(ldb_module_get_ctx(module), "More than one object found matching objectGUID %s\n",
5411 GUID_string(tmp_ctx, &guid));
5412 talloc_free(tmp_ctx);
5413 return LDB_ERR_OPERATIONS_ERROR;
5414 } else {
5415 target_msg = target_res->msgs[0];
5416 dsdb_dn->dn = talloc_steal(dsdb_dn, target_msg->dn);
5417 }
5418
5419 /*
5420 * Check for deleted objects per MS-DRSR 4.1.10.6.13
5421 * ProcessLinkValue, because link updates are not applied to
5422 * recycled and tombstone objects. We don't have to delete
5423 * any existing link, that should have happened when the
5424 * object deletion was replicated or initiated.
5425 */
5426 replmd_deletion_state(module, target_msg,
5427 &target_deletion_state, NULL);
5428
5429 if (target_deletion_state >= OBJECT_RECYCLED) {
5430 talloc_free(tmp_ctx);
5431 return LDB_SUCCESS;
5432 }
5433
5434 /* see if this link already exists */
5435 pdn = parsed_dn_find(pdn_list, old_el->num_values, &guid, dsdb_dn->dn);
5436 if (pdn != NULL) {
5437 /* see if this update is newer than what we have already */
5438 struct GUID invocation_id = GUID_zero();
5439 uint32_t version = 0;
5440 uint32_t originating_usn = 0;
5441 NTTIME change_time = 0;
5442 uint32_t rmd_flags = dsdb_dn_rmd_flags(pdn->dsdb_dn->dn);
5443
5444 dsdb_get_extended_dn_guid(pdn->dsdb_dn->dn, &invocation_id, "RMD_INVOCID");
5445 dsdb_get_extended_dn_uint32(pdn->dsdb_dn->dn, &version, "RMD_VERSION");
5446 dsdb_get_extended_dn_uint32(pdn->dsdb_dn->dn, &originating_usn, "RMD_ORIGINATING_USN");
5447 dsdb_get_extended_dn_nttime(pdn->dsdb_dn->dn, &change_time, "RMD_CHANGETIME");
5448
5449 if (!replmd_update_is_newer(&invocation_id,
5450 &la->meta_data.originating_invocation_id,
5451 version,
5452 la->meta_data.version,
5453 change_time,
5454 la->meta_data.originating_change_time)) {
5455 DEBUG(3,("Discarding older DRS linked attribute update to %s on %s from %s\n",
5456 old_el->name, ldb_dn_get_linearized(msg->dn),
5457 GUID_string(tmp_ctx, &la->meta_data.originating_invocation_id)));
5458 talloc_free(tmp_ctx);
5459 return LDB_SUCCESS;
5460 }
5461
5462 /* get a seq_num for this change */
5463 ret = ldb_sequence_number(ldb, LDB_SEQ_NEXT, &seq_num);
5464 if (ret != LDB_SUCCESS) {
5465 talloc_free(tmp_ctx);
5466 return ret;
5467 }
5468
5469 if (!(rmd_flags & DSDB_RMD_FLAG_DELETED)) {
5470 /* remove the existing backlink */
5471 ret = replmd_add_backlink(module, schema, &la->identifier->guid, &guid, false, attr, false);
5472 if (ret != LDB_SUCCESS) {
5473 talloc_free(tmp_ctx);
5474 return ret;
5475 }
5476 }
5477
5478 ret = replmd_update_la_val(tmp_ctx, pdn->v, dsdb_dn, pdn->dsdb_dn,
5479 &la->meta_data.originating_invocation_id,
5480 la->meta_data.originating_usn, seq_num,
5481 la->meta_data.originating_change_time,
5482 la->meta_data.version,
5483 !active);
5484 if (ret != LDB_SUCCESS) {
5485 talloc_free(tmp_ctx);
5486 return ret;
5487 }
5488
5489 if (active) {
5490 /* add the new backlink */
5491 ret = replmd_add_backlink(module, schema, &la->identifier->guid, &guid, true, attr, false);
5492 if (ret != LDB_SUCCESS) {
5493 talloc_free(tmp_ctx);
5494 return ret;
5495 }
5496 }
5497 } else {
5498 /* get a seq_num for this change */
5499 ret = ldb_sequence_number(ldb, LDB_SEQ_NEXT, &seq_num);
5500 if (ret != LDB_SUCCESS) {
5501 talloc_free(tmp_ctx);
5502 return ret;
5503 }
5504
5505 old_el->values = talloc_realloc(msg->elements, old_el->values,
5506 struct ldb_val, old_el->num_values+1);
5507 if (!old_el->values) {
5508 ldb_module_oom(module);
5509 return LDB_ERR_OPERATIONS_ERROR;
5510 }
5511 old_el->num_values++;
5512
5513 ret = replmd_build_la_val(tmp_ctx, &old_el->values[old_el->num_values-1], dsdb_dn,
5514 &la->meta_data.originating_invocation_id,
5515 la->meta_data.originating_usn, seq_num,
5516 la->meta_data.originating_change_time,
5517 la->meta_data.version,
5518 (la->flags & DRSUAPI_DS_LINKED_ATTRIBUTE_FLAG_ACTIVE)?false:true);
5519 if (ret != LDB_SUCCESS) {
5520 talloc_free(tmp_ctx);
5521 return ret;
5522 }
5523
5524 if (active) {
5525 ret = replmd_add_backlink(module, schema, &la->identifier->guid, &guid,
5526 true, attr, false);
5527 if (ret != LDB_SUCCESS) {
5528 talloc_free(tmp_ctx);
5529 return ret;
5530 }
5531 }
5532 }
5533
5534 /* we only change whenChanged and uSNChanged if the seq_num
5535 has changed */
5536 ret = add_time_element(msg, "whenChanged", t);
5537 if (ret != LDB_SUCCESS) {
5538 talloc_free(tmp_ctx);
5539 ldb_operr(ldb);
5540 return ret;
5541 }
5542
5543 ret = add_uint64_element(ldb, msg, "uSNChanged", seq_num);
5544 if (ret != LDB_SUCCESS) {
5545 talloc_free(tmp_ctx);
5546 ldb_operr(ldb);
5547 return ret;
5548 }
5549
5550 old_el = ldb_msg_find_element(msg, attr->lDAPDisplayName);
5551 if (old_el == NULL) {
5552 talloc_free(tmp_ctx);
5553 return ldb_operr(ldb);
5554 }
5555
5556 ret = dsdb_check_single_valued_link(attr, old_el);
5557 if (ret != LDB_SUCCESS) {
5558 talloc_free(tmp_ctx);
5559 return ret;
5560 }
5561
5562 old_el->flags |= LDB_FLAG_INTERNAL_DISABLE_SINGLE_VALUE_CHECK;
5563
5564 ret = dsdb_module_modify(module, msg, DSDB_FLAG_NEXT_MODULE, parent);
5565 if (ret != LDB_SUCCESS) {
5566 ldb_debug(ldb, LDB_DEBUG_WARNING, "Failed to apply linked attribute change '%s'\n%s\n",
5567 ldb_errstring(ldb),
5568 ldb_ldif_message_string(ldb, tmp_ctx, LDB_CHANGETYPE_MODIFY, msg));
5569 talloc_free(tmp_ctx);
5570 return ret;
5571 }
5572
5573 talloc_free(tmp_ctx);
5574
5575 return ret;
5576 }
5577
5578 static int replmd_extended(struct ldb_module *module, struct ldb_request *req)
5579 {
5580 if (strcmp(req->op.extended.oid, DSDB_EXTENDED_REPLICATED_OBJECTS_OID) == 0) {
5581 return replmd_extended_replicated_objects(module, req);
5582 }
5583
5584 return ldb_next_request(module, req);
5585 }
5586
5587
5588 /*
5589 we hook into the transaction operations to allow us to
5590 perform the linked attribute updates at the end of the whole
5591 transaction. This allows a forward linked attribute to be created
5592 before the object is created. During a vampire, w2k8 sends us linked
5593 attributes before the objects they are part of.
5594 */
5595 static int replmd_start_transaction(struct ldb_module *module)
5596 {
5597 /* create our private structure for this transaction */
5598 struct replmd_private *replmd_private = talloc_get_type(ldb_module_get_private(module),
5599 struct replmd_private);
5600 replmd_txn_cleanup(replmd_private);
5601
5602 /* free any leftover mod_usn records from cancelled
5603 transactions */
5604 while (replmd_private->ncs) {
5605 struct nc_entry *e = replmd_private->ncs;
5606 DLIST_REMOVE(replmd_private->ncs, e);
5607 talloc_free(e);
5608 }
5609
5610 return ldb_next_start_trans(module);
5611 }
5612
5613 /*
5614 on prepare commit we loop over our queued la_context structures and
5615 apply each of them
5616 */
5617 static int replmd_prepare_commit(struct ldb_module *module)
5618 {
5619 struct replmd_private *replmd_private =
5620 talloc_get_type(ldb_module_get_private(module), struct replmd_private);
5621 struct la_entry *la, *prev;
5622 struct la_backlink *bl;
5623 int ret;
5624
5625 /* walk the list backwards, to do the first entry first, as we
5626 * added the entries with DLIST_ADD() which puts them at the
5627 * start of the list */
5628 for (la = DLIST_TAIL(replmd_private->la_list); la; la=prev) {
5629 prev = DLIST_PREV(la);
5630 DLIST_REMOVE(replmd_private->la_list, la);
5631 ret = replmd_process_linked_attribute(module, la, NULL);
5632 if (ret != LDB_SUCCESS) {
5633 replmd_txn_cleanup(replmd_private);
5634 return ret;
5635 }
5636 }
5637
5638 /* process our backlink list, creating and deleting backlinks
5639 as necessary */
5640 for (bl=replmd_private->la_backlinks; bl; bl=bl->next) {
5641 ret = replmd_process_backlink(module, bl, NULL);
5642 if (ret != LDB_SUCCESS) {
5643 replmd_txn_cleanup(replmd_private);
5644 return ret;
5645 }
5646 }
5647
5648 replmd_txn_cleanup(replmd_private);
5649
5650 /* possibly change @REPLCHANGED */
5651 ret = replmd_notify_store(module, NULL);
5652 if (ret != LDB_SUCCESS) {
5653 return ret;
5654 }
5655
5656 return ldb_next_prepare_commit(module);
5657 }
5658
5659 static int replmd_del_transaction(struct ldb_module *module)
5660 {
5661 struct replmd_private *replmd_private =
5662 talloc_get_type(ldb_module_get_private(module), struct replmd_private);
5663 replmd_txn_cleanup(replmd_private);
5664
5665 return ldb_next_del_trans(module);
5666 }
5667
5668
5669 static const struct ldb_module_ops ldb_repl_meta_data_module_ops = {
5670 .name = "repl_meta_data",
5671 .init_context = replmd_init,
5672 .add = replmd_add,
5673 .modify = replmd_modify,
5674 .rename = replmd_rename,
5675 .del = replmd_delete,
5676 .extended = replmd_extended,
5677 .start_transaction = replmd_start_transaction,
5678 .prepare_commit = replmd_prepare_commit,
5679 .del_transaction = replmd_del_transaction,
5680 };
5681
5682 int ldb_repl_meta_data_module_init(const char *version)
5683 {
5684 LDB_MODULE_CHECK_VERSION(version);
5685 return ldb_register_module(&ldb_repl_meta_data_module_ops);
5686 }
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