5100b7cb7c89ea2e6a4bb9521b52980fd2b5c743
[ira/wip.git] / source / dsdb / samdb / ldb_modules / repl_meta_data.c
1 /* 
2    ldb database library
3
4    Copyright (C) Simo Sorce  2004-2006
5    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
6    Copyright (C) Andrew Tridgell 2005
7    Copyright (C) Stefan Metzmacher <metze@samba.org> 2007
8
9      ** NOTE! The following LGPL license applies to the ldb
10      ** library. This does NOT imply that all of Samba is released
11      ** under the LGPL
12    
13    This library is free software; you can redistribute it and/or
14    modify it under the terms of the GNU Lesser General Public
15    License as published by the Free Software Foundation; either
16    version 3 of the License, or (at your option) any later version.
17
18    This library is distributed in the hope that it will be useful,
19    but WITHOUT ANY WARRANTY; without even the implied warranty of
20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
21    Lesser General Public License for more details.
22
23    You should have received a copy of the GNU Lesser General Public
24    License along with this library; if not, see <http://www.gnu.org/licenses/>.
25 */
26
27 /*
28  *  Name: ldb
29  *
30  *  Component: ldb repl_meta_data module
31  *
32  *  Description: - add a unique objectGUID onto every new record,
33  *               - handle whenCreated, whenChanged timestamps
34  *               - handle uSNCreated, uSNChanged numbers
35  *               - handle replPropertyMetaData attribute
36  *
37  *  Author: Simo Sorce
38  *  Author: Stefan Metzmacher
39  */
40
41 #include "includes.h"
42 #include "lib/ldb/include/ldb.h"
43 #include "lib/ldb/include/ldb_errors.h"
44 #include "lib/ldb/include/ldb_private.h"
45 #include "dsdb/samdb/samdb.h"
46 #include "dsdb/common/flags.h"
47 #include "librpc/gen_ndr/ndr_misc.h"
48 #include "librpc/gen_ndr/ndr_drsuapi.h"
49 #include "librpc/gen_ndr/ndr_drsblobs.h"
50 #include "param/param.h"
51
52 struct replmd_replicated_request {
53         struct ldb_module *module;
54         struct ldb_handle *handle;
55         struct ldb_request *orig_req;
56
57         const struct dsdb_schema *schema;
58
59         struct dsdb_extended_replicated_objects *objs;
60
61         uint32_t index_current;
62
63         struct {
64                 TALLOC_CTX *mem_ctx;
65                 struct ldb_request *search_req;
66                 struct ldb_message *search_msg;
67                 int search_ret;
68                 struct ldb_request *change_req;
69                 int change_ret;
70         } sub;
71 };
72
73 static struct replmd_replicated_request *replmd_replicated_init_handle(struct ldb_module *module,
74                                                                        struct ldb_request *req,
75                                                                        struct dsdb_extended_replicated_objects *objs)
76 {
77         struct replmd_replicated_request *ar;
78         struct ldb_handle *h;
79         const struct dsdb_schema *schema;
80
81         schema = dsdb_get_schema(module->ldb);
82         if (!schema) {
83                 ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
84                               "replmd_replicated_init_handle: no loaded schema found\n");
85                 return NULL;
86         }
87
88         h = talloc_zero(req, struct ldb_handle);
89         if (h == NULL) {
90                 ldb_set_errstring(module->ldb, "Out of Memory");
91                 return NULL;
92         }
93
94         h->module       = module;
95         h->state        = LDB_ASYNC_PENDING;
96         h->status       = LDB_SUCCESS;
97
98         ar = talloc_zero(h, struct replmd_replicated_request);
99         if (ar == NULL) {
100                 ldb_set_errstring(module->ldb, "Out of Memory");
101                 talloc_free(h);
102                 return NULL;
103         }
104
105         h->private_data = ar;
106
107         ar->module      = module;
108         ar->handle      = h;
109         ar->orig_req    = req;
110         ar->schema      = schema;
111         ar->objs        = objs;
112
113         req->handle = h;
114
115         return ar;
116 }
117
118 /*
119   add a time element to a record
120 */
121 static int add_time_element(struct ldb_message *msg, const char *attr, time_t t)
122 {
123         struct ldb_message_element *el;
124         char *s;
125
126         if (ldb_msg_find_element(msg, attr) != NULL) {
127                 return 0;
128         }
129
130         s = ldb_timestring(msg, t);
131         if (s == NULL) {
132                 return -1;
133         }
134
135         if (ldb_msg_add_string(msg, attr, s) != 0) {
136                 return -1;
137         }
138
139         el = ldb_msg_find_element(msg, attr);
140         /* always set as replace. This works because on add ops, the flag
141            is ignored */
142         el->flags = LDB_FLAG_MOD_REPLACE;
143
144         return 0;
145 }
146
147 /*
148   add a uint64_t element to a record
149 */
150 static int add_uint64_element(struct ldb_message *msg, const char *attr, uint64_t v)
151 {
152         struct ldb_message_element *el;
153
154         if (ldb_msg_find_element(msg, attr) != NULL) {
155                 return 0;
156         }
157
158         if (ldb_msg_add_fmt(msg, attr, "%llu", (unsigned long long)v) != 0) {
159                 return -1;
160         }
161
162         el = ldb_msg_find_element(msg, attr);
163         /* always set as replace. This works because on add ops, the flag
164            is ignored */
165         el->flags = LDB_FLAG_MOD_REPLACE;
166
167         return 0;
168 }
169
170 static int replmd_replPropertyMetaData1_attid_sort(const struct replPropertyMetaData1 *m1,
171                                                    const struct replPropertyMetaData1 *m2,
172                                                    const uint32_t *rdn_attid)
173 {
174         if (m1->attid == m2->attid) {
175                 return 0;
176         }
177
178         /*
179          * the rdn attribute should be at the end!
180          * so we need to return a value greater than zero
181          * which means m1 is greater than m2
182          */
183         if (m1->attid == *rdn_attid) {
184                 return 1;
185         }
186
187         /*
188          * the rdn attribute should be at the end!
189          * so we need to return a value less than zero
190          * which means m2 is greater than m1
191          */
192         if (m2->attid == *rdn_attid) {
193                 return -1;
194         }
195
196         return m1->attid - m2->attid;
197 }
198
199 static void replmd_replPropertyMetaDataCtr1_sort(struct replPropertyMetaDataCtr1 *ctr1,
200                                                  const uint32_t *rdn_attid)
201 {
202         ldb_qsort(ctr1->array, ctr1->count, sizeof(struct replPropertyMetaData1),
203                   discard_const_p(void, rdn_attid), (ldb_qsort_cmp_fn_t)replmd_replPropertyMetaData1_attid_sort);
204 }
205
206 static int replmd_ldb_message_element_attid_sort(const struct ldb_message_element *e1,
207                                                  const struct ldb_message_element *e2,
208                                                  const struct dsdb_schema *schema)
209 {
210         const struct dsdb_attribute *a1;
211         const struct dsdb_attribute *a2;
212
213         /* 
214          * TODO: make this faster by caching the dsdb_attribute pointer
215          *       on the ldb_messag_element
216          */
217
218         a1 = dsdb_attribute_by_lDAPDisplayName(schema, e1->name);
219         a2 = dsdb_attribute_by_lDAPDisplayName(schema, e2->name);
220
221         /*
222          * TODO: remove this check, we should rely on e1 and e2 having valid attribute names
223          *       in the schema
224          */
225         if (!a1 || !a2) {
226                 return strcasecmp(e1->name, e2->name);
227         }
228
229         return a1->attributeID_id - a2->attributeID_id;
230 }
231
232 static void replmd_ldb_message_sort(struct ldb_message *msg,
233                                     const struct dsdb_schema *schema)
234 {
235         ldb_qsort(msg->elements, msg->num_elements, sizeof(struct ldb_message_element),
236                   discard_const_p(void, schema), (ldb_qsort_cmp_fn_t)replmd_ldb_message_element_attid_sort);
237 }
238
239 static int replmd_prepare_originating(struct ldb_module *module, struct ldb_request *req,
240                                       struct ldb_dn *dn, const char *fn_name,
241                                       int (*fn)(struct ldb_module *,
242                                                 struct ldb_request *,
243                                                 const struct dsdb_schema *))
244 {
245         const struct dsdb_schema *schema;
246  
247         /* do not manipulate our control entries */
248         if (ldb_dn_is_special(dn)) {
249                 return ldb_next_request(module, req);
250         }
251
252         schema = dsdb_get_schema(module->ldb);
253         if (!schema) {
254                 ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
255                               "%s: no dsdb_schema loaded",
256                               fn_name);
257                 return LDB_ERR_CONSTRAINT_VIOLATION;
258         }
259
260         return fn(module, req, schema);
261 }
262
263 static int replmd_add_originating(struct ldb_module *module,
264                                   struct ldb_request *req,
265                                   const struct dsdb_schema *schema)
266 {
267         enum ndr_err_code ndr_err;
268         struct ldb_request *down_req;
269         struct ldb_message *msg;
270         const struct dsdb_attribute *rdn_attr = NULL;
271         struct GUID guid;
272         struct ldb_val guid_value;
273         struct replPropertyMetaDataBlob nmd;
274         struct ldb_val nmd_value;
275         uint64_t seq_num;
276         const struct GUID *our_invocation_id;
277         time_t t = time(NULL);
278         NTTIME now;
279         char *time_str;
280         int ret;
281         uint32_t i, ni=0;
282
283         ldb_debug(module->ldb, LDB_DEBUG_TRACE, "replmd_add_originating\n");
284
285         if (ldb_msg_find_element(req->op.add.message, "objectGUID")) {
286                 ldb_debug_set(module->ldb, LDB_DEBUG_ERROR,
287                               "replmd_add_originating: it's not allowed to add an object with objectGUID\n");
288                 return LDB_ERR_UNWILLING_TO_PERFORM;
289         }
290
291         /* Get a sequence number from the backend */
292         ret = ldb_sequence_number(module->ldb, LDB_SEQ_NEXT, &seq_num);
293         if (ret != LDB_SUCCESS) {
294                 return ret;
295         }
296
297         /* a new GUID */
298         guid = GUID_random();
299
300         /* get our invicationId */
301         our_invocation_id = samdb_ntds_invocation_id(module->ldb);
302         if (!our_invocation_id) {
303                 ldb_debug_set(module->ldb, LDB_DEBUG_ERROR,
304                               "replmd_add_originating: unable to find invocationId\n");
305                 return LDB_ERR_OPERATIONS_ERROR;
306         }
307
308         /* create a copy of the request */
309         down_req = talloc(req, struct ldb_request);
310         if (down_req == NULL) {
311                 ldb_oom(module->ldb);
312                 return LDB_ERR_OPERATIONS_ERROR;
313         }
314         *down_req = *req;
315
316         /* we have to copy the message as the caller might have it as a const */
317         down_req->op.add.message = msg = ldb_msg_copy_shallow(down_req, req->op.add.message);
318         if (msg == NULL) {
319                 talloc_free(down_req);
320                 ldb_oom(module->ldb);
321                 return LDB_ERR_OPERATIONS_ERROR;
322         }
323
324         /* generated times */
325         unix_to_nt_time(&now, t);
326         time_str = ldb_timestring(msg, t);
327         if (!time_str) {
328                 talloc_free(down_req);
329                 return LDB_ERR_OPERATIONS_ERROR;
330         }
331
332         /* 
333          * remove autogenerated attributes
334          */
335         ldb_msg_remove_attr(msg, "whenCreated");
336         ldb_msg_remove_attr(msg, "whenChanged");
337         ldb_msg_remove_attr(msg, "uSNCreated");
338         ldb_msg_remove_attr(msg, "uSNChanged");
339         ldb_msg_remove_attr(msg, "replPropertyMetaData");
340
341         /*
342          * readd replicated attributes
343          */
344         ret = ldb_msg_add_string(msg, "whenCreated", time_str);
345         if (ret != LDB_SUCCESS) {
346                 talloc_free(down_req);
347                 ldb_oom(module->ldb);
348                 return LDB_ERR_OPERATIONS_ERROR;
349         }
350
351         /* build the replication meta_data */
352         ZERO_STRUCT(nmd);
353         nmd.version             = 1;
354         nmd.ctr.ctr1.count      = msg->num_elements;
355         nmd.ctr.ctr1.array      = talloc_array(msg,
356                                                struct replPropertyMetaData1,
357                                                nmd.ctr.ctr1.count);
358         if (!nmd.ctr.ctr1.array) {
359                 talloc_free(down_req);
360                 ldb_oom(module->ldb);
361                 return LDB_ERR_OPERATIONS_ERROR;
362         }
363
364         for (i=0; i < msg->num_elements; i++) {
365                 struct ldb_message_element *e = &msg->elements[i];
366                 struct replPropertyMetaData1 *m = &nmd.ctr.ctr1.array[ni];
367                 const struct dsdb_attribute *sa;
368
369                 if (e->name[0] == '@') continue;
370
371                 sa = dsdb_attribute_by_lDAPDisplayName(schema, e->name);
372                 if (!sa) {
373                         ldb_debug_set(module->ldb, LDB_DEBUG_ERROR,
374                                       "replmd_add_originating: attribute '%s' not defined in schema\n",
375                                       e->name);
376                         talloc_free(down_req);
377                         return LDB_ERR_NO_SUCH_ATTRIBUTE;
378                 }
379
380                 if ((sa->systemFlags & 0x00000001) || (sa->systemFlags & 0x00000004)) {
381                         /* if the attribute is not replicated (0x00000001)
382                          * or constructed (0x00000004) it has no metadata
383                          */
384                         continue;
385                 }
386
387                 m->attid                        = sa->attributeID_id;
388                 m->version                      = 1;
389                 m->originating_change_time      = now;
390                 m->originating_invocation_id    = *our_invocation_id;
391                 m->originating_usn              = seq_num;
392                 m->local_usn                    = seq_num;
393                 ni++;
394
395                 if (ldb_attr_cmp(e->name, ldb_dn_get_rdn_name(msg->dn))) {
396                         rdn_attr = sa;
397                 }
398         }
399
400         /* fix meta data count */
401         nmd.ctr.ctr1.count = ni;
402
403         /*
404          * sort meta data array, and move the rdn attribute entry to the end
405          */
406         replmd_replPropertyMetaDataCtr1_sort(&nmd.ctr.ctr1, &rdn_attr->attributeID_id);
407
408         /* generated NDR encoded values */
409         ndr_err = ndr_push_struct_blob(&guid_value, msg, 
410                                        NULL,
411                                        &guid,
412                                        (ndr_push_flags_fn_t)ndr_push_GUID);
413         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
414                 ldb_oom(module->ldb);
415                 return LDB_ERR_OPERATIONS_ERROR;
416         }
417         ndr_err = ndr_push_struct_blob(&nmd_value, msg, 
418                                        lp_iconv_convenience(ldb_get_opaque(module->ldb, "loadparm")),
419                                        &nmd,
420                                        (ndr_push_flags_fn_t)ndr_push_replPropertyMetaDataBlob);
421         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
422                 talloc_free(down_req);
423                 ldb_oom(module->ldb);
424                 return LDB_ERR_OPERATIONS_ERROR;
425         }
426
427         /*
428          * add the autogenerated values
429          */
430         ret = ldb_msg_add_value(msg, "objectGUID", &guid_value, NULL);
431         if (ret != LDB_SUCCESS) {
432                 talloc_free(down_req);
433                 ldb_oom(module->ldb);
434                 return LDB_ERR_OPERATIONS_ERROR;
435         }
436         ret = ldb_msg_add_string(msg, "whenChanged", time_str);
437         if (ret != LDB_SUCCESS) {
438                 talloc_free(down_req);
439                 ldb_oom(module->ldb);
440                 return LDB_ERR_OPERATIONS_ERROR;
441         }
442         ret = samdb_msg_add_uint64(module->ldb, msg, msg, "uSNCreated", seq_num);
443         if (ret != LDB_SUCCESS) {
444                 talloc_free(down_req);
445                 ldb_oom(module->ldb);
446                 return LDB_ERR_OPERATIONS_ERROR;
447         }
448         ret = samdb_msg_add_uint64(module->ldb, msg, msg, "uSNChanged", seq_num);
449         if (ret != LDB_SUCCESS) {
450                 talloc_free(down_req);
451                 ldb_oom(module->ldb);
452                 return LDB_ERR_OPERATIONS_ERROR;
453         }
454         ret = ldb_msg_add_value(msg, "replPropertyMetaData", &nmd_value, NULL);
455         if (ret != LDB_SUCCESS) {
456                 talloc_free(down_req);
457                 ldb_oom(module->ldb);
458                 return LDB_ERR_OPERATIONS_ERROR;
459         }
460
461         /*
462          * sort the attributes by attid before storing the object
463          */
464         replmd_ldb_message_sort(msg, schema);
465
466         ldb_set_timeout_from_prev_req(module->ldb, req, down_req);
467
468         /* go on with the call chain */
469         ret = ldb_next_request(module, down_req);
470
471         /* do not free down_req as the call results may be linked to it,
472          * it will be freed when the upper level request get freed */
473         if (ret == LDB_SUCCESS) {
474                 req->handle = down_req->handle;
475         }
476
477         return ret;
478 }
479
480 static int replmd_add(struct ldb_module *module, struct ldb_request *req)
481 {
482         return replmd_prepare_originating(module, req, req->op.add.message->dn,
483                                           "replmd_add", replmd_add_originating);
484 }
485
486 static int replmd_modify_originating(struct ldb_module *module,
487                                      struct ldb_request *req,
488                                      const struct dsdb_schema *schema)
489 {
490         struct ldb_request *down_req;
491         struct ldb_message *msg;
492         int ret;
493         time_t t = time(NULL);
494         uint64_t seq_num;
495
496         ldb_debug(module->ldb, LDB_DEBUG_TRACE, "replmd_modify_originating\n");
497
498         down_req = talloc(req, struct ldb_request);
499         if (down_req == NULL) {
500                 return LDB_ERR_OPERATIONS_ERROR;
501         }
502
503         *down_req = *req;
504
505         /* we have to copy the message as the caller might have it as a const */
506         down_req->op.mod.message = msg = ldb_msg_copy_shallow(down_req, req->op.mod.message);
507         if (msg == NULL) {
508                 talloc_free(down_req);
509                 return LDB_ERR_OPERATIONS_ERROR;
510         }
511
512         if (add_time_element(msg, "whenChanged", t) != 0) {
513                 talloc_free(down_req);
514                 return LDB_ERR_OPERATIONS_ERROR;
515         }
516
517         /* Get a sequence number from the backend */
518         ret = ldb_sequence_number(module->ldb, LDB_SEQ_NEXT, &seq_num);
519         if (ret == LDB_SUCCESS) {
520                 if (add_uint64_element(msg, "uSNChanged", seq_num) != 0) {
521                         talloc_free(down_req);
522                         return LDB_ERR_OPERATIONS_ERROR;
523                 }
524         }
525
526         ldb_set_timeout_from_prev_req(module->ldb, req, down_req);
527
528         /* go on with the call chain */
529         ret = ldb_next_request(module, down_req);
530
531         /* do not free down_req as the call results may be linked to it,
532          * it will be freed when the upper level request get freed */
533         if (ret == LDB_SUCCESS) {
534                 req->handle = down_req->handle;
535         }
536
537         return ret;
538 }
539
540 static int replmd_modify(struct ldb_module *module, struct ldb_request *req)
541 {
542         return replmd_prepare_originating(module, req, req->op.mod.message->dn,
543                                           "replmd_modify", replmd_modify_originating);
544 }
545
546 static int replmd_replicated_request_reply_helper(struct replmd_replicated_request *ar, int ret)
547 {
548         struct ldb_reply *ares = NULL;
549
550         ar->handle->status = ret;
551         ar->handle->state = LDB_ASYNC_DONE;
552
553         if (!ar->orig_req->callback) {
554                 return LDB_SUCCESS;
555         }
556         
557         /* we're done and need to report the success to the caller */
558         ares = talloc_zero(ar, struct ldb_reply);
559         if (!ares) {
560                 ar->handle->status = LDB_ERR_OPERATIONS_ERROR;
561                 ar->handle->state = LDB_ASYNC_DONE;
562                 return LDB_ERR_OPERATIONS_ERROR;
563         }
564
565         ares->type      = LDB_REPLY_EXTENDED;
566         ares->response  = NULL;
567
568         return ar->orig_req->callback(ar->module->ldb, ar->orig_req->context, ares);
569 }
570
571 static int replmd_replicated_request_done(struct replmd_replicated_request *ar)
572 {
573         return replmd_replicated_request_reply_helper(ar, LDB_SUCCESS);
574 }
575
576 static int replmd_replicated_request_error(struct replmd_replicated_request *ar, int ret)
577 {
578         return replmd_replicated_request_reply_helper(ar, ret);
579 }
580
581 static int replmd_replicated_request_werror(struct replmd_replicated_request *ar, WERROR status)
582 {
583         int ret = LDB_ERR_OTHER;
584         /* TODO: do some error mapping */
585         return replmd_replicated_request_reply_helper(ar, ret);
586 }
587
588 static int replmd_replicated_apply_next(struct replmd_replicated_request *ar);
589
590 static int replmd_replicated_apply_add_callback(struct ldb_context *ldb,
591                                                 void *private_data,
592                                                 struct ldb_reply *ares)
593 {
594 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */ 
595         struct replmd_replicated_request *ar = talloc_get_type(private_data,
596                                                struct replmd_replicated_request);
597
598         ar->sub.change_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
599         if (ar->sub.change_ret != LDB_SUCCESS) {
600                 return replmd_replicated_request_error(ar, ar->sub.change_ret);
601         }
602
603         talloc_free(ar->sub.mem_ctx);
604         ZERO_STRUCT(ar->sub);
605
606         ar->index_current++;
607
608         return replmd_replicated_apply_next(ar);
609 #else
610         return LDB_SUCCESS;
611 #endif
612 }
613
614 static int replmd_replicated_apply_add(struct replmd_replicated_request *ar)
615 {
616         enum ndr_err_code ndr_err;
617         struct ldb_message *msg;
618         struct replPropertyMetaDataBlob *md;
619         struct ldb_val md_value;
620         uint32_t i;
621         uint64_t seq_num;
622         int ret;
623
624         /*
625          * TODO: check if the parent object exist
626          */
627
628         /*
629          * TODO: handle the conflict case where an object with the
630          *       same name exist
631          */
632
633         msg = ar->objs->objects[ar->index_current].msg;
634         md = ar->objs->objects[ar->index_current].meta_data;
635
636         ret = ldb_sequence_number(ar->module->ldb, LDB_SEQ_NEXT, &seq_num);
637         if (ret != LDB_SUCCESS) {
638                 return replmd_replicated_request_error(ar, ret);
639         }
640
641         ret = ldb_msg_add_value(msg, "objectGUID", &ar->objs->objects[ar->index_current].guid_value, NULL);
642         if (ret != LDB_SUCCESS) {
643                 return replmd_replicated_request_error(ar, ret);
644         }
645
646         ret = ldb_msg_add_string(msg, "whenChanged", ar->objs->objects[ar->index_current].when_changed);
647         if (ret != LDB_SUCCESS) {
648                 return replmd_replicated_request_error(ar, ret);
649         }
650
651         ret = samdb_msg_add_uint64(ar->module->ldb, msg, msg, "uSNCreated", seq_num);
652         if (ret != LDB_SUCCESS) {
653                 return replmd_replicated_request_error(ar, ret);
654         }
655
656         ret = samdb_msg_add_uint64(ar->module->ldb, msg, msg, "uSNChanged", seq_num);
657         if (ret != LDB_SUCCESS) {
658                 return replmd_replicated_request_error(ar, ret);
659         }
660
661         /*
662          * the meta data array is already sorted by the caller
663          */
664         for (i=0; i < md->ctr.ctr1.count; i++) {
665                 md->ctr.ctr1.array[i].local_usn = seq_num;
666         }
667         ndr_err = ndr_push_struct_blob(&md_value, msg, 
668                                        lp_iconv_convenience(ldb_get_opaque(ar->module->ldb, "loadparm")),
669                                        md,
670                                        (ndr_push_flags_fn_t)ndr_push_replPropertyMetaDataBlob);
671         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
672                 NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
673                 return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
674         }
675         ret = ldb_msg_add_value(msg, "replPropertyMetaData", &md_value, NULL);
676         if (ret != LDB_SUCCESS) {
677                 return replmd_replicated_request_error(ar, ret);
678         }
679
680         replmd_ldb_message_sort(msg, ar->schema);
681
682         ret = ldb_build_add_req(&ar->sub.change_req,
683                                 ar->module->ldb,
684                                 ar->sub.mem_ctx,
685                                 msg,
686                                 NULL,
687                                 ar,
688                                 replmd_replicated_apply_add_callback);
689         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
690
691 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */ 
692         return ldb_next_request(ar->module, ar->sub.change_req);
693 #else
694         ret = ldb_next_request(ar->module, ar->sub.change_req);
695         if (ret != LDB_SUCCESS) {
696                 ldb_asprintf_errstring(ar->module->ldb, "Failed to add replicated object %s: %s", ldb_dn_get_linearized(ar->sub.change_req->op.add.message->dn), 
697                                        ldb_errstring(ar->module->ldb));
698                 return replmd_replicated_request_error(ar, ret);
699         }
700
701         ar->sub.change_ret = ldb_wait(ar->sub.change_req->handle, LDB_WAIT_ALL);
702         if (ar->sub.change_ret != LDB_SUCCESS) {
703                 ldb_asprintf_errstring(ar->module->ldb, "Failed while waiting on add replicated object %s: %s", ldb_dn_get_linearized(ar->sub.change_req->op.add.message->dn), 
704                                        ldb_errstring(ar->module->ldb));
705                 return replmd_replicated_request_error(ar, ar->sub.change_ret);
706         }
707
708         talloc_free(ar->sub.mem_ctx);
709         ZERO_STRUCT(ar->sub);
710
711         ar->index_current++;
712
713         return LDB_SUCCESS;
714 #endif
715 }
716
717 static int replmd_replPropertyMetaData1_conflict_compare(struct replPropertyMetaData1 *m1,
718                                                          struct replPropertyMetaData1 *m2)
719 {
720         int ret;
721
722         if (m1->version != m2->version) {
723                 return m1->version - m2->version;
724         }
725
726         if (m1->originating_change_time != m2->originating_change_time) {
727                 return m1->originating_change_time - m2->originating_change_time;
728         }
729
730         ret = GUID_compare(&m1->originating_invocation_id, &m2->originating_invocation_id);
731         if (ret != 0) {
732                 return ret;
733         }
734
735         return m1->originating_usn - m2->originating_usn;
736 }
737
738 static int replmd_replicated_apply_merge_callback(struct ldb_context *ldb,
739                                                   void *private_data,
740                                                   struct ldb_reply *ares)
741 {
742 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */ 
743         struct replmd_replicated_request *ar = talloc_get_type(private_data,
744                                                struct replmd_replicated_request);
745
746         ret = ldb_next_request(ar->module, ar->sub.change_req);
747         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
748
749         ar->sub.change_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
750         if (ar->sub.change_ret != LDB_SUCCESS) {
751                 return replmd_replicated_request_error(ar, ar->sub.change_ret);
752         }
753
754         talloc_free(ar->sub.mem_ctx);
755         ZERO_STRUCT(ar->sub);
756
757         ar->index_current++;
758
759         return LDB_SUCCESS;
760 #else
761         return LDB_SUCCESS;
762 #endif
763 }
764
765 static int replmd_replicated_apply_merge(struct replmd_replicated_request *ar)
766 {
767         enum ndr_err_code ndr_err;
768         struct ldb_message *msg;
769         struct replPropertyMetaDataBlob *rmd;
770         struct replPropertyMetaDataBlob omd;
771         const struct ldb_val *omd_value;
772         struct replPropertyMetaDataBlob nmd;
773         struct ldb_val nmd_value;
774         uint32_t i,j,ni=0;
775         uint32_t removed_attrs = 0;
776         uint64_t seq_num;
777         int ret;
778
779         msg = ar->objs->objects[ar->index_current].msg;
780         rmd = ar->objs->objects[ar->index_current].meta_data;
781         ZERO_STRUCT(omd);
782         omd.version = 1;
783
784         /*
785          * TODO: add rename conflict handling
786          */
787         if (ldb_dn_compare(msg->dn, ar->sub.search_msg->dn) != 0) {
788                 ldb_debug_set(ar->module->ldb, LDB_DEBUG_FATAL, "replmd_replicated_apply_merge[%u]: rename not supported",
789                               ar->index_current);
790                 ldb_debug(ar->module->ldb, LDB_DEBUG_FATAL, "%s => %s\n",
791                           ldb_dn_get_linearized(ar->sub.search_msg->dn),
792                           ldb_dn_get_linearized(msg->dn));
793                 return replmd_replicated_request_werror(ar, WERR_NOT_SUPPORTED);
794         }
795
796         ret = ldb_sequence_number(ar->module->ldb, LDB_SEQ_NEXT, &seq_num);
797         if (ret != LDB_SUCCESS) {
798                 return replmd_replicated_request_error(ar, ret);
799         }
800
801         /* find existing meta data */
802         omd_value = ldb_msg_find_ldb_val(ar->sub.search_msg, "replPropertyMetaData");
803         if (omd_value) {
804                 ndr_err = ndr_pull_struct_blob(omd_value, ar->sub.mem_ctx, 
805                                                lp_iconv_convenience(ldb_get_opaque(ar->module->ldb, "loadparm")), &omd,
806                                                (ndr_pull_flags_fn_t)ndr_pull_replPropertyMetaDataBlob);
807                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
808                         NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
809                         return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
810                 }
811
812                 if (omd.version != 1) {
813                         return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
814                 }
815         }
816
817         ZERO_STRUCT(nmd);
818         nmd.version = 1;
819         nmd.ctr.ctr1.count = omd.ctr.ctr1.count + rmd->ctr.ctr1.count;
820         nmd.ctr.ctr1.array = talloc_array(ar->sub.mem_ctx,
821                                           struct replPropertyMetaData1,
822                                           nmd.ctr.ctr1.count);
823         if (!nmd.ctr.ctr1.array) return replmd_replicated_request_werror(ar, WERR_NOMEM);
824
825         /* first copy the old meta data */
826         for (i=0; i < omd.ctr.ctr1.count; i++) {
827                 nmd.ctr.ctr1.array[ni]  = omd.ctr.ctr1.array[i];
828                 ni++;
829         }
830
831         /* now merge in the new meta data */
832         for (i=0; i < rmd->ctr.ctr1.count; i++) {
833                 bool found = false;
834
835                 rmd->ctr.ctr1.array[i].local_usn = seq_num;
836
837                 for (j=0; j < ni; j++) {
838                         int cmp;
839
840                         if (rmd->ctr.ctr1.array[i].attid != nmd.ctr.ctr1.array[j].attid) {
841                                 continue;
842                         }
843
844                         cmp = replmd_replPropertyMetaData1_conflict_compare(&rmd->ctr.ctr1.array[i],
845                                                                             &nmd.ctr.ctr1.array[j]);
846                         if (cmp > 0) {
847                                 /* replace the entry */
848                                 nmd.ctr.ctr1.array[j] = rmd->ctr.ctr1.array[i];
849                                 found = true;
850                                 break;
851                         }
852
853                         /* we don't want to apply this change so remove the attribute */
854                         ldb_msg_remove_element(msg, &msg->elements[i-removed_attrs]);
855                         removed_attrs++;
856
857                         found = true;
858                         break;
859                 }
860
861                 if (found) continue;
862
863                 nmd.ctr.ctr1.array[ni] = rmd->ctr.ctr1.array[i];
864                 ni++;
865         }
866
867         /*
868          * finally correct the size of the meta_data array
869          */
870         nmd.ctr.ctr1.count = ni;
871
872         /*
873          * the rdn attribute (the alias for the name attribute),
874          * 'cn' for most objects is the last entry in the meta data array
875          * we have stored
876          *
877          * sort the new meta data array
878          */
879         {
880                 struct replPropertyMetaData1 *rdn_p;
881                 uint32_t rdn_idx = omd.ctr.ctr1.count - 1;
882
883                 rdn_p = &nmd.ctr.ctr1.array[rdn_idx];
884                 replmd_replPropertyMetaDataCtr1_sort(&nmd.ctr.ctr1, &rdn_p->attid);
885         }
886
887         /* create the meta data value */
888         ndr_err = ndr_push_struct_blob(&nmd_value, msg, 
889                                        lp_iconv_convenience(ldb_get_opaque(ar->module->ldb, "loadparm")),
890                                        &nmd,
891                                        (ndr_push_flags_fn_t)ndr_push_replPropertyMetaDataBlob);
892         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
893                 NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
894                 return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
895         }
896
897         /*
898          * check if some replicated attributes left, otherwise skip the ldb_modify() call
899          */
900         if (msg->num_elements == 0) {
901                 ldb_debug(ar->module->ldb, LDB_DEBUG_TRACE, "replmd_replicated_apply_merge[%u]: skip replace\n",
902                           ar->index_current);
903                 goto next_object;
904         }
905
906         ldb_debug(ar->module->ldb, LDB_DEBUG_TRACE, "replmd_replicated_apply_merge[%u]: replace %u attributes\n",
907                   ar->index_current, msg->num_elements);
908
909         /*
910          * when we now that we'll modify the record, add the whenChanged, uSNChanged
911          * and replPopertyMetaData attributes
912          */
913         ret = ldb_msg_add_string(msg, "whenChanged", ar->objs->objects[ar->index_current].when_changed);
914         if (ret != LDB_SUCCESS) {
915                 return replmd_replicated_request_error(ar, ret);
916         }
917         ret = samdb_msg_add_uint64(ar->module->ldb, msg, msg, "uSNChanged", seq_num);
918         if (ret != LDB_SUCCESS) {
919                 return replmd_replicated_request_error(ar, ret);
920         }
921         ret = ldb_msg_add_value(msg, "replPropertyMetaData", &nmd_value, NULL);
922         if (ret != LDB_SUCCESS) {
923                 return replmd_replicated_request_error(ar, ret);
924         }
925
926         replmd_ldb_message_sort(msg, ar->schema);
927
928         /* we want to replace the old values */
929         for (i=0; i < msg->num_elements; i++) {
930                 msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
931         }
932
933         ret = ldb_build_mod_req(&ar->sub.change_req,
934                                 ar->module->ldb,
935                                 ar->sub.mem_ctx,
936                                 msg,
937                                 NULL,
938                                 ar,
939                                 replmd_replicated_apply_merge_callback);
940         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
941
942 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */ 
943         return ldb_next_request(ar->module, ar->sub.change_req);
944 #else
945         ret = ldb_next_request(ar->module, ar->sub.change_req);
946         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
947
948         ar->sub.change_ret = ldb_wait(ar->sub.change_req->handle, LDB_WAIT_ALL);
949         if (ar->sub.change_ret != LDB_SUCCESS) {
950                 return replmd_replicated_request_error(ar, ar->sub.change_ret);
951         }
952
953 next_object:
954         talloc_free(ar->sub.mem_ctx);
955         ZERO_STRUCT(ar->sub);
956
957         ar->index_current++;
958
959         return LDB_SUCCESS;
960 #endif
961 }
962
963 static int replmd_replicated_apply_search_callback(struct ldb_context *ldb,
964                                                    void *private_data,
965                                                    struct ldb_reply *ares)
966 {
967         struct replmd_replicated_request *ar = talloc_get_type(private_data,
968                                                struct replmd_replicated_request);
969         bool is_done = false;
970
971         switch (ares->type) {
972         case LDB_REPLY_ENTRY:
973                 ar->sub.search_msg = talloc_steal(ar->sub.mem_ctx, ares->message);
974                 break;
975         case LDB_REPLY_REFERRAL:
976                 /* we ignore referrals */
977                 break;
978         case LDB_REPLY_EXTENDED:
979         case LDB_REPLY_DONE:
980                 is_done = true;
981         }
982
983         talloc_free(ares);
984
985 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */ 
986         if (is_done) {
987                 ar->sub.search_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
988                 if (ar->sub.search_ret != LDB_SUCCESS) {
989                         return replmd_replicated_request_error(ar, ar->sub.search_ret);
990                 }
991                 if (ar->sub.search_msg) {
992                         return replmd_replicated_apply_merge(ar);
993                 }
994                 return replmd_replicated_apply_add(ar);
995         }
996 #endif
997         return LDB_SUCCESS;
998 }
999
1000 static int replmd_replicated_apply_search(struct replmd_replicated_request *ar)
1001 {
1002         int ret;
1003         char *tmp_str;
1004         char *filter;
1005
1006         tmp_str = ldb_binary_encode(ar->sub.mem_ctx, ar->objs->objects[ar->index_current].guid_value);
1007         if (!tmp_str) return replmd_replicated_request_werror(ar, WERR_NOMEM);
1008
1009         filter = talloc_asprintf(ar->sub.mem_ctx, "(objectGUID=%s)", tmp_str);
1010         if (!filter) return replmd_replicated_request_werror(ar, WERR_NOMEM);
1011         talloc_free(tmp_str);
1012
1013         ret = ldb_build_search_req(&ar->sub.search_req,
1014                                    ar->module->ldb,
1015                                    ar->sub.mem_ctx,
1016                                    ar->objs->partition_dn,
1017                                    LDB_SCOPE_SUBTREE,
1018                                    filter,
1019                                    NULL,
1020                                    NULL,
1021                                    ar,
1022                                    replmd_replicated_apply_search_callback);
1023         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1024
1025 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */ 
1026         return ldb_next_request(ar->module, ar->sub.search_req);
1027 #else
1028         ret = ldb_next_request(ar->module, ar->sub.search_req);
1029         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1030
1031         ar->sub.search_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
1032         if (ar->sub.search_ret != LDB_SUCCESS && ar->sub.search_ret != LDB_ERR_NO_SUCH_OBJECT) {
1033                 return replmd_replicated_request_error(ar, ar->sub.search_ret);
1034         }
1035         if (ar->sub.search_msg) {
1036                 return replmd_replicated_apply_merge(ar);
1037         }
1038
1039         return replmd_replicated_apply_add(ar);
1040 #endif
1041 }
1042
1043 static int replmd_replicated_apply_next(struct replmd_replicated_request *ar)
1044 {
1045 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */ 
1046         if (ar->index_current >= ar->objs->num_objects) {
1047                 return replmd_replicated_uptodate_vector(ar);
1048         }
1049 #endif
1050
1051         ar->sub.mem_ctx = talloc_new(ar);
1052         if (!ar->sub.mem_ctx) return replmd_replicated_request_werror(ar, WERR_NOMEM);
1053
1054         return replmd_replicated_apply_search(ar);
1055 }
1056
1057 static int replmd_replicated_uptodate_modify_callback(struct ldb_context *ldb,
1058                                                       void *private_data,
1059                                                       struct ldb_reply *ares)
1060 {
1061 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */ 
1062         struct replmd_replicated_request *ar = talloc_get_type(private_data,
1063                                                struct replmd_replicated_request);
1064
1065         ar->sub.change_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
1066         if (ar->sub.change_ret != LDB_SUCCESS) {
1067                 return replmd_replicated_request_error(ar, ar->sub.change_ret);
1068         }
1069
1070         talloc_free(ar->sub.mem_ctx);
1071         ZERO_STRUCT(ar->sub);
1072
1073         return replmd_replicated_request_done(ar);
1074 #else
1075         return LDB_SUCCESS;
1076 #endif
1077 }
1078
1079 static int replmd_drsuapi_DsReplicaCursor2_compare(const struct drsuapi_DsReplicaCursor2 *c1,
1080                                                    const struct drsuapi_DsReplicaCursor2 *c2)
1081 {
1082         return GUID_compare(&c1->source_dsa_invocation_id, &c2->source_dsa_invocation_id);
1083 }
1084
1085 static int replmd_replicated_uptodate_modify(struct replmd_replicated_request *ar)
1086 {
1087         enum ndr_err_code ndr_err;
1088         struct ldb_message *msg;
1089         struct replUpToDateVectorBlob ouv;
1090         const struct ldb_val *ouv_value;
1091         const struct drsuapi_DsReplicaCursor2CtrEx *ruv;
1092         struct replUpToDateVectorBlob nuv;
1093         struct ldb_val nuv_value;
1094         struct ldb_message_element *nuv_el = NULL;
1095         const struct GUID *our_invocation_id;
1096         struct ldb_message_element *orf_el = NULL;
1097         struct repsFromToBlob nrf;
1098         struct ldb_val *nrf_value = NULL;
1099         struct ldb_message_element *nrf_el = NULL;
1100         uint32_t i,j,ni=0;
1101         uint64_t seq_num;
1102         bool found = false;
1103         time_t t = time(NULL);
1104         NTTIME now;
1105         int ret;
1106
1107         ruv = ar->objs->uptodateness_vector;
1108         ZERO_STRUCT(ouv);
1109         ouv.version = 2;
1110         ZERO_STRUCT(nuv);
1111         nuv.version = 2;
1112
1113         unix_to_nt_time(&now, t);
1114
1115         /* 
1116          * we use the next sequence number for our own highest_usn
1117          * because we will do a modify request and this will increment
1118          * our highest_usn
1119          */
1120         ret = ldb_sequence_number(ar->module->ldb, LDB_SEQ_NEXT, &seq_num);
1121         if (ret != LDB_SUCCESS) {
1122                 return replmd_replicated_request_error(ar, ret);
1123         }
1124
1125         /*
1126          * first create the new replUpToDateVector
1127          */
1128         ouv_value = ldb_msg_find_ldb_val(ar->sub.search_msg, "replUpToDateVector");
1129         if (ouv_value) {
1130                 ndr_err = ndr_pull_struct_blob(ouv_value, ar->sub.mem_ctx, 
1131                                                lp_iconv_convenience(ldb_get_opaque(ar->module->ldb, "loadparm")), &ouv,
1132                                                (ndr_pull_flags_fn_t)ndr_pull_replUpToDateVectorBlob);
1133                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1134                         NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
1135                         return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
1136                 }
1137
1138                 if (ouv.version != 2) {
1139                         return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
1140                 }
1141         }
1142
1143         /*
1144          * the new uptodateness vector will at least
1145          * contain 1 entry, one for the source_dsa
1146          *
1147          * plus optional values from our old vector and the one from the source_dsa
1148          */
1149         nuv.ctr.ctr2.count = 1 + ouv.ctr.ctr2.count;
1150         if (ruv) nuv.ctr.ctr2.count += ruv->count;
1151         nuv.ctr.ctr2.cursors = talloc_array(ar->sub.mem_ctx,
1152                                             struct drsuapi_DsReplicaCursor2,
1153                                             nuv.ctr.ctr2.count);
1154         if (!nuv.ctr.ctr2.cursors) return replmd_replicated_request_werror(ar, WERR_NOMEM);
1155
1156         /* first copy the old vector */
1157         for (i=0; i < ouv.ctr.ctr2.count; i++) {
1158                 nuv.ctr.ctr2.cursors[ni] = ouv.ctr.ctr2.cursors[i];
1159                 ni++;
1160         }
1161
1162         /* get our invocation_id if we have one already attached to the ldb */
1163         our_invocation_id = samdb_ntds_invocation_id(ar->module->ldb);
1164
1165         /* merge in the source_dsa vector is available */
1166         for (i=0; (ruv && i < ruv->count); i++) {
1167                 found = false;
1168
1169                 if (our_invocation_id &&
1170                     GUID_equal(&ruv->cursors[i].source_dsa_invocation_id,
1171                                our_invocation_id)) {
1172                         continue;
1173                 }
1174
1175                 for (j=0; j < ni; j++) {
1176                         if (!GUID_equal(&ruv->cursors[i].source_dsa_invocation_id,
1177                                         &nuv.ctr.ctr2.cursors[j].source_dsa_invocation_id)) {
1178                                 continue;
1179                         }
1180
1181                         found = true;
1182
1183                         /*
1184                          * we update only the highest_usn and not the latest_sync_success time,
1185                          * because the last success stands for direct replication
1186                          */
1187                         if (ruv->cursors[i].highest_usn > nuv.ctr.ctr2.cursors[j].highest_usn) {
1188                                 nuv.ctr.ctr2.cursors[j].highest_usn = ruv->cursors[i].highest_usn;
1189                         }
1190                         break;                  
1191                 }
1192
1193                 if (found) continue;
1194
1195                 /* if it's not there yet, add it */
1196                 nuv.ctr.ctr2.cursors[ni] = ruv->cursors[i];
1197                 ni++;
1198         }
1199
1200         /*
1201          * merge in the current highwatermark for the source_dsa
1202          */
1203         found = false;
1204         for (j=0; j < ni; j++) {
1205                 if (!GUID_equal(&ar->objs->source_dsa->source_dsa_invocation_id,
1206                                 &nuv.ctr.ctr2.cursors[j].source_dsa_invocation_id)) {
1207                         continue;
1208                 }
1209
1210                 found = true;
1211
1212                 /*
1213                  * here we update the highest_usn and last_sync_success time
1214                  * because we're directly replicating from the source_dsa
1215                  *
1216                  * and use the tmp_highest_usn because this is what we have just applied
1217                  * to our ldb
1218                  */
1219                 nuv.ctr.ctr2.cursors[j].highest_usn             = ar->objs->source_dsa->highwatermark.tmp_highest_usn;
1220                 nuv.ctr.ctr2.cursors[j].last_sync_success       = now;
1221                 break;
1222         }
1223         if (!found) {
1224                 /*
1225                  * here we update the highest_usn and last_sync_success time
1226                  * because we're directly replicating from the source_dsa
1227                  *
1228                  * and use the tmp_highest_usn because this is what we have just applied
1229                  * to our ldb
1230                  */
1231                 nuv.ctr.ctr2.cursors[ni].source_dsa_invocation_id= ar->objs->source_dsa->source_dsa_invocation_id;
1232                 nuv.ctr.ctr2.cursors[ni].highest_usn            = ar->objs->source_dsa->highwatermark.tmp_highest_usn;
1233                 nuv.ctr.ctr2.cursors[ni].last_sync_success      = now;
1234                 ni++;
1235         }
1236
1237         /*
1238          * finally correct the size of the cursors array
1239          */
1240         nuv.ctr.ctr2.count = ni;
1241
1242         /*
1243          * sort the cursors
1244          */
1245         qsort(nuv.ctr.ctr2.cursors, nuv.ctr.ctr2.count,
1246               sizeof(struct drsuapi_DsReplicaCursor2),
1247               (comparison_fn_t)replmd_drsuapi_DsReplicaCursor2_compare);
1248
1249         /*
1250          * create the change ldb_message
1251          */
1252         msg = ldb_msg_new(ar->sub.mem_ctx);
1253         if (!msg) return replmd_replicated_request_werror(ar, WERR_NOMEM);
1254         msg->dn = ar->sub.search_msg->dn;
1255
1256         ndr_err = ndr_push_struct_blob(&nuv_value, msg, 
1257                                        lp_iconv_convenience(ldb_get_opaque(ar->module->ldb, "loadparm")), 
1258                                        &nuv,
1259                                        (ndr_push_flags_fn_t)ndr_push_replUpToDateVectorBlob);
1260         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1261                 NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
1262                 return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
1263         }
1264         ret = ldb_msg_add_value(msg, "replUpToDateVector", &nuv_value, &nuv_el);
1265         if (ret != LDB_SUCCESS) {
1266                 return replmd_replicated_request_error(ar, ret);
1267         }
1268         nuv_el->flags = LDB_FLAG_MOD_REPLACE;
1269
1270         /*
1271          * now create the new repsFrom value from the given repsFromTo1 structure
1272          */
1273         ZERO_STRUCT(nrf);
1274         nrf.version                                     = 1;
1275         nrf.ctr.ctr1                                    = *ar->objs->source_dsa;
1276         /* and fix some values... */
1277         nrf.ctr.ctr1.consecutive_sync_failures          = 0;
1278         nrf.ctr.ctr1.last_success                       = now;
1279         nrf.ctr.ctr1.last_attempt                       = now;
1280         nrf.ctr.ctr1.result_last_attempt                = WERR_OK;
1281         nrf.ctr.ctr1.highwatermark.highest_usn          = nrf.ctr.ctr1.highwatermark.tmp_highest_usn;
1282
1283         /*
1284          * first see if we already have a repsFrom value for the current source dsa
1285          * if so we'll later replace this value
1286          */
1287         orf_el = ldb_msg_find_element(ar->sub.search_msg, "repsFrom");
1288         if (orf_el) {
1289                 for (i=0; i < orf_el->num_values; i++) {
1290                         struct repsFromToBlob *trf;
1291
1292                         trf = talloc(ar->sub.mem_ctx, struct repsFromToBlob);
1293                         if (!trf) return replmd_replicated_request_werror(ar, WERR_NOMEM);
1294
1295                         ndr_err = ndr_pull_struct_blob(&orf_el->values[i], trf, lp_iconv_convenience(ldb_get_opaque(ar->module->ldb, "loadparm")), trf,
1296                                                        (ndr_pull_flags_fn_t)ndr_pull_repsFromToBlob);
1297                         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1298                                 NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
1299                                 return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
1300                         }
1301
1302                         if (trf->version != 1) {
1303                                 return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
1304                         }
1305
1306                         /*
1307                          * we compare the source dsa objectGUID not the invocation_id
1308                          * because we want only one repsFrom value per source dsa
1309                          * and when the invocation_id of the source dsa has changed we don't need 
1310                          * the old repsFrom with the old invocation_id
1311                          */
1312                         if (!GUID_equal(&trf->ctr.ctr1.source_dsa_obj_guid,
1313                                         &ar->objs->source_dsa->source_dsa_obj_guid)) {
1314                                 talloc_free(trf);
1315                                 continue;
1316                         }
1317
1318                         talloc_free(trf);
1319                         nrf_value = &orf_el->values[i];
1320                         break;
1321                 }
1322
1323                 /*
1324                  * copy over all old values to the new ldb_message
1325                  */
1326                 ret = ldb_msg_add_empty(msg, "repsFrom", 0, &nrf_el);
1327                 if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1328                 *nrf_el = *orf_el;
1329         }
1330
1331         /*
1332          * if we haven't found an old repsFrom value for the current source dsa
1333          * we'll add a new value
1334          */
1335         if (!nrf_value) {
1336                 struct ldb_val zero_value;
1337                 ZERO_STRUCT(zero_value);
1338                 ret = ldb_msg_add_value(msg, "repsFrom", &zero_value, &nrf_el);
1339                 if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1340
1341                 nrf_value = &nrf_el->values[nrf_el->num_values - 1];
1342         }
1343
1344         /* we now fill the value which is already attached to ldb_message */
1345         ndr_err = ndr_push_struct_blob(nrf_value, msg, 
1346                                        lp_iconv_convenience(ldb_get_opaque(ar->module->ldb, "loadparm")),
1347                                        &nrf,
1348                                        (ndr_push_flags_fn_t)ndr_push_repsFromToBlob);
1349         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1350                 NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
1351                 return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
1352         }
1353
1354         /* 
1355          * the ldb_message_element for the attribute, has all the old values and the new one
1356          * so we'll replace the whole attribute with all values
1357          */
1358         nrf_el->flags = LDB_FLAG_MOD_REPLACE;
1359
1360         /* prepare the ldb_modify() request */
1361         ret = ldb_build_mod_req(&ar->sub.change_req,
1362                                 ar->module->ldb,
1363                                 ar->sub.mem_ctx,
1364                                 msg,
1365                                 NULL,
1366                                 ar,
1367                                 replmd_replicated_uptodate_modify_callback);
1368         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1369
1370 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */ 
1371         return ldb_next_request(ar->module, ar->sub.change_req);
1372 #else
1373         ret = ldb_next_request(ar->module, ar->sub.change_req);
1374         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1375
1376         ar->sub.change_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
1377         if (ar->sub.change_ret != LDB_SUCCESS) {
1378                 return replmd_replicated_request_error(ar, ar->sub.change_ret);
1379         }
1380
1381         talloc_free(ar->sub.mem_ctx);
1382         ZERO_STRUCT(ar->sub);
1383
1384         return replmd_replicated_request_done(ar);
1385 #endif
1386 }
1387
1388 static int replmd_replicated_uptodate_search_callback(struct ldb_context *ldb,
1389                                                       void *private_data,
1390                                                       struct ldb_reply *ares)
1391 {
1392         struct replmd_replicated_request *ar = talloc_get_type(private_data,
1393                                                struct replmd_replicated_request);
1394         bool is_done = false;
1395
1396         switch (ares->type) {
1397         case LDB_REPLY_ENTRY:
1398                 ar->sub.search_msg = talloc_steal(ar->sub.mem_ctx, ares->message);
1399                 break;
1400         case LDB_REPLY_REFERRAL:
1401                 /* we ignore referrals */
1402                 break;
1403         case LDB_REPLY_EXTENDED:
1404         case LDB_REPLY_DONE:
1405                 is_done = true;
1406         }
1407
1408         talloc_free(ares);
1409
1410 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */ 
1411         if (is_done) {
1412                 ar->sub.search_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
1413                 if (ar->sub.search_ret != LDB_SUCCESS) {
1414                         return replmd_replicated_request_error(ar, ar->sub.search_ret);
1415                 }
1416                 if (!ar->sub.search_msg) {
1417                         return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
1418                 }
1419
1420                 return replmd_replicated_uptodate_modify(ar);
1421         }
1422 #endif
1423         return LDB_SUCCESS;
1424 }
1425
1426 static int replmd_replicated_uptodate_search(struct replmd_replicated_request *ar)
1427 {
1428         int ret;
1429         static const char *attrs[] = {
1430                 "replUpToDateVector",
1431                 "repsFrom",
1432                 NULL
1433         };
1434
1435         ret = ldb_build_search_req(&ar->sub.search_req,
1436                                    ar->module->ldb,
1437                                    ar->sub.mem_ctx,
1438                                    ar->objs->partition_dn,
1439                                    LDB_SCOPE_BASE,
1440                                    "(objectClass=*)",
1441                                    attrs,
1442                                    NULL,
1443                                    ar,
1444                                    replmd_replicated_uptodate_search_callback);
1445         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1446
1447 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */ 
1448         return ldb_next_request(ar->module, ar->sub.search_req);
1449 #else
1450         ret = ldb_next_request(ar->module, ar->sub.search_req);
1451         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1452
1453         ar->sub.search_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
1454         if (ar->sub.search_ret != LDB_SUCCESS) {
1455                 return replmd_replicated_request_error(ar, ar->sub.search_ret);
1456         }
1457         if (!ar->sub.search_msg) {
1458                 return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
1459         }
1460
1461         return replmd_replicated_uptodate_modify(ar);
1462 #endif
1463 }
1464
1465 static int replmd_replicated_uptodate_vector(struct replmd_replicated_request *ar)
1466 {
1467         ar->sub.mem_ctx = talloc_new(ar);
1468         if (!ar->sub.mem_ctx) return replmd_replicated_request_werror(ar, WERR_NOMEM);
1469
1470         return replmd_replicated_uptodate_search(ar);
1471 }
1472
1473 static int replmd_extended_replicated_objects(struct ldb_module *module, struct ldb_request *req)
1474 {
1475         struct dsdb_extended_replicated_objects *objs;
1476         struct replmd_replicated_request *ar;
1477
1478         ldb_debug(module->ldb, LDB_DEBUG_TRACE, "replmd_extended_replicated_objects\n");
1479
1480         objs = talloc_get_type(req->op.extended.data, struct dsdb_extended_replicated_objects);
1481         if (!objs) {
1482                 ldb_debug(module->ldb, LDB_DEBUG_FATAL, "replmd_extended_replicated_objects: invalid extended data\n");
1483                 return LDB_ERR_PROTOCOL_ERROR;
1484         }
1485
1486         if (objs->version != DSDB_EXTENDED_REPLICATED_OBJECTS_VERSION) {
1487                 ldb_debug(module->ldb, LDB_DEBUG_FATAL, "replmd_extended_replicated_objects: extended data invalid version [%u != %u]\n",
1488                           objs->version, DSDB_EXTENDED_REPLICATED_OBJECTS_VERSION);
1489                 return LDB_ERR_PROTOCOL_ERROR;
1490         }
1491
1492         ar = replmd_replicated_init_handle(module, req, objs);
1493         if (!ar) {
1494                 return LDB_ERR_OPERATIONS_ERROR;
1495         }
1496
1497 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */ 
1498         return replmd_replicated_apply_next(ar);
1499 #else
1500         while (ar->index_current < ar->objs->num_objects &&
1501                req->handle->state != LDB_ASYNC_DONE) { 
1502                 replmd_replicated_apply_next(ar);
1503         }
1504
1505         if (req->handle->state != LDB_ASYNC_DONE) {
1506                 replmd_replicated_uptodate_vector(ar);
1507         }
1508
1509         return LDB_SUCCESS;
1510 #endif
1511 }
1512
1513 static int replmd_extended(struct ldb_module *module, struct ldb_request *req)
1514 {
1515         if (strcmp(req->op.extended.oid, DSDB_EXTENDED_REPLICATED_OBJECTS_OID) == 0) {
1516                 return replmd_extended_replicated_objects(module, req);
1517         }
1518
1519         return ldb_next_request(module, req);
1520 }
1521
1522 static int replmd_wait_none(struct ldb_handle *handle) {
1523         struct replmd_replicated_request *ar;
1524     
1525         if (!handle || !handle->private_data) {
1526                 return LDB_ERR_OPERATIONS_ERROR;
1527         }
1528
1529         ar = talloc_get_type(handle->private_data, struct replmd_replicated_request);
1530         if (!ar) {
1531                 return LDB_ERR_OPERATIONS_ERROR;
1532         }
1533
1534         /* we do only sync calls */
1535         if (handle->state != LDB_ASYNC_DONE) {
1536                 return LDB_ERR_OPERATIONS_ERROR;
1537         }
1538
1539         return handle->status;
1540 }
1541
1542 static int replmd_wait_all(struct ldb_handle *handle) {
1543
1544         int ret;
1545
1546         while (handle->state != LDB_ASYNC_DONE) {
1547                 ret = replmd_wait_none(handle);
1548                 if (ret != LDB_SUCCESS) {
1549                         return ret;
1550                 }
1551         }
1552
1553         return handle->status;
1554 }
1555
1556 static int replmd_wait(struct ldb_handle *handle, enum ldb_wait_type type)
1557 {
1558         if (type == LDB_WAIT_ALL) {
1559                 return replmd_wait_all(handle);
1560         } else {
1561                 return replmd_wait_none(handle);
1562         }
1563 }
1564
1565 static const struct ldb_module_ops replmd_ops = {
1566         .name          = "repl_meta_data",
1567         .add           = replmd_add,
1568         .modify        = replmd_modify,
1569         .extended      = replmd_extended,
1570         .wait          = replmd_wait
1571 };
1572
1573 int repl_meta_data_module_init(void)
1574 {
1575         return ldb_register_module(&replmd_ops);
1576 }