source4/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 }