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         /* TODO:
 513          * - get the whole old object
 514          * - if the old object doesn't exist report an error
 515          * - give an error when a readonly attribute should
 516          *   be modified
 517          * - merge the changed into the old object
 518          *   if the caller set values to the same value
 519          *   ignore the attribute, return success when no
 520          *   attribute was changed
 521          * - calculate the new replPropertyMetaData attribute
 522          */
 523
 524         if (add_time_element(msg, "whenChanged", t) != 0) {
 525                 talloc_free(down_req);
 526                 return LDB_ERR_OPERATIONS_ERROR;
 527         }
 528
 529         /* Get a sequence number from the backend */
 530         ret = ldb_sequence_number(module->ldb, LDB_SEQ_NEXT, &seq_num);
 531         if (ret == LDB_SUCCESS) {
 532                 if (add_uint64_element(msg, "uSNChanged", seq_num) != 0) {
 533                         talloc_free(down_req);
 534                         return LDB_ERR_OPERATIONS_ERROR;
 535                 }
 536         }
 537
 538         /* TODO:
 539          * - sort the attributes by attid with replmd_ldb_message_sort()
 540          * - replace the old object with the newly constructed one
 541          */
 542
 543         ldb_set_timeout_from_prev_req(module->ldb, req, down_req);
 544
 545         /* go on with the call chain */
 546         ret = ldb_next_request(module, down_req);
 547
 548         /* do not free down_req as the call results may be linked to it,
 549          * it will be freed when the upper level request get freed */
 550         if (ret == LDB_SUCCESS) {
 551                 req->handle = down_req->handle;
 552         }
 553
 554         return ret;
 555 }
 556
 557 static int replmd_modify(struct ldb_module *module, struct ldb_request *req)
 558 {
 559         return replmd_prepare_originating(module, req, req->op.mod.message->dn,
 560                                           "replmd_modify", replmd_modify_originating);
 561 }
 562
 563 static int replmd_replicated_request_reply_helper(struct replmd_replicated_request *ar, int ret)
 564 {
 565         struct ldb_reply *ares = NULL;
 566
 567         ar->handle->status = ret;
 568         ar->handle->state = LDB_ASYNC_DONE;
 569
 570         if (!ar->orig_req->callback) {
 571                 return LDB_SUCCESS;
 572         }
 573
 574         /* we're done and need to report the success to the caller */
 575         ares = talloc_zero(ar, struct ldb_reply);
 576         if (!ares) {
 577                 ar->handle->status = LDB_ERR_OPERATIONS_ERROR;
 578                 ar->handle->state = LDB_ASYNC_DONE;
 579                 return LDB_ERR_OPERATIONS_ERROR;
 580         }
 581
 582         ares->type      = LDB_REPLY_EXTENDED;
 583         ares->response  = NULL;
 584
 585         return ar->orig_req->callback(ar->module->ldb, ar->orig_req->context, ares);
 586 }
 587
 588 static int replmd_replicated_request_done(struct replmd_replicated_request *ar)
 589 {
 590         return replmd_replicated_request_reply_helper(ar, LDB_SUCCESS);
 591 }
 592
 593 static int replmd_replicated_request_error(struct replmd_replicated_request *ar, int ret)
 594 {
 595         return replmd_replicated_request_reply_helper(ar, ret);
 596 }
 597
 598 static int replmd_replicated_request_werror(struct replmd_replicated_request *ar, WERROR status)
 599 {
 600         int ret = LDB_ERR_OTHER;
 601         /* TODO: do some error mapping */
 602         return replmd_replicated_request_reply_helper(ar, ret);
 603 }
 604
 605 static int replmd_replicated_apply_next(struct replmd_replicated_request *ar);
 606
 607 static int replmd_replicated_apply_add_callback(struct ldb_context *ldb,
 608                                                 void *private_data,
 609                                                 struct ldb_reply *ares)
 610 {
 611 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
 612         struct replmd_replicated_request *ar = talloc_get_type(private_data,
 613                                                struct replmd_replicated_request);
 614
 615         ar->sub.change_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
 616         if (ar->sub.change_ret != LDB_SUCCESS) {
 617                 return replmd_replicated_request_error(ar, ar->sub.change_ret);
 618         }
 619
 620         talloc_free(ar->sub.mem_ctx);
 621         ZERO_STRUCT(ar->sub);
 622
 623         ar->index_current++;
 624
 625         return replmd_replicated_apply_next(ar);
 626 #else
 627         return LDB_SUCCESS;
 628 #endif
 629 }
 630
 631 static int replmd_replicated_apply_add(struct replmd_replicated_request *ar)
 632 {
 633         enum ndr_err_code ndr_err;
 634         struct ldb_message *msg;
 635         struct replPropertyMetaDataBlob *md;
 636         struct ldb_val md_value;
 637         uint32_t i;
 638         uint64_t seq_num;
 639         int ret;
 640
 641         /*
 642          * TODO: check if the parent object exist
 643          */
 644
 645         /*
 646          * TODO: handle the conflict case where an object with the
 647          *       same name exist
 648          */
 649
 650         msg = ar->objs->objects[ar->index_current].msg;
 651         md = ar->objs->objects[ar->index_current].meta_data;
 652
 653         ret = ldb_sequence_number(ar->module->ldb, LDB_SEQ_NEXT, &seq_num);
 654         if (ret != LDB_SUCCESS) {
 655                 return replmd_replicated_request_error(ar, ret);
 656         }
 657
 658         ret = ldb_msg_add_value(msg, "objectGUID", &ar->objs->objects[ar->index_current].guid_value, NULL);
 659         if (ret != LDB_SUCCESS) {
 660                 return replmd_replicated_request_error(ar, ret);
 661         }
 662
 663         ret = ldb_msg_add_string(msg, "whenChanged", ar->objs->objects[ar->index_current].when_changed);
 664         if (ret != LDB_SUCCESS) {
 665                 return replmd_replicated_request_error(ar, ret);
 666         }
 667
 668         ret = samdb_msg_add_uint64(ar->module->ldb, msg, msg, "uSNCreated", seq_num);
 669         if (ret != LDB_SUCCESS) {
 670                 return replmd_replicated_request_error(ar, ret);
 671         }
 672
 673         ret = samdb_msg_add_uint64(ar->module->ldb, msg, msg, "uSNChanged", seq_num);
 674         if (ret != LDB_SUCCESS) {
 675                 return replmd_replicated_request_error(ar, ret);
 676         }
 677
 678         /*
 679          * the meta data array is already sorted by the caller
 680          */
 681         for (i=0; i < md->ctr.ctr1.count; i++) {
 682                 md->ctr.ctr1.array[i].local_usn = seq_num;
 683         }
 684         ndr_err = ndr_push_struct_blob(&md_value, msg,
 685                                        lp_iconv_convenience(ldb_get_opaque(ar->module->ldb, "loadparm")),
 686                                        md,
 687                                        (ndr_push_flags_fn_t)ndr_push_replPropertyMetaDataBlob);
 688         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 689                 NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
 690                 return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
 691         }
 692         ret = ldb_msg_add_value(msg, "replPropertyMetaData", &md_value, NULL);
 693         if (ret != LDB_SUCCESS) {
 694                 return replmd_replicated_request_error(ar, ret);
 695         }
 696
 697         replmd_ldb_message_sort(msg, ar->schema);
 698
 699         ret = ldb_build_add_req(&ar->sub.change_req,
 700                                 ar->module->ldb,
 701                                 ar->sub.mem_ctx,
 702                                 msg,
 703                                 NULL,
 704                                 ar,
 705                                 replmd_replicated_apply_add_callback);
 706         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
 707
 708 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
 709         return ldb_next_request(ar->module, ar->sub.change_req);
 710 #else
 711         ret = ldb_next_request(ar->module, ar->sub.change_req);
 712         if (ret != LDB_SUCCESS) {
 713                 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),
 714                                        ldb_errstring(ar->module->ldb));
 715                 return replmd_replicated_request_error(ar, ret);
 716         }
 717
 718         ar->sub.change_ret = ldb_wait(ar->sub.change_req->handle, LDB_WAIT_ALL);
 719         if (ar->sub.change_ret != LDB_SUCCESS) {
 720                 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),
 721                                        ldb_errstring(ar->module->ldb));
 722                 return replmd_replicated_request_error(ar, ar->sub.change_ret);
 723         }
 724
 725         talloc_free(ar->sub.mem_ctx);
 726         ZERO_STRUCT(ar->sub);
 727
 728         ar->index_current++;
 729
 730         return LDB_SUCCESS;
 731 #endif
 732 }
 733
 734 static int replmd_replPropertyMetaData1_conflict_compare(struct replPropertyMetaData1 *m1,
 735                                                          struct replPropertyMetaData1 *m2)
 736 {
 737         int ret;
 738
 739         if (m1->version != m2->version) {
 740                 return m1->version - m2->version;
 741         }
 742
 743         if (m1->originating_change_time != m2->originating_change_time) {
 744                 return m1->originating_change_time - m2->originating_change_time;
 745         }
 746
 747         ret = GUID_compare(&m1->originating_invocation_id, &m2->originating_invocation_id);
 748         if (ret != 0) {
 749                 return ret;
 750         }
 751
 752         return m1->originating_usn - m2->originating_usn;
 753 }
 754
 755 static int replmd_replicated_apply_merge_callback(struct ldb_context *ldb,
 756                                                   void *private_data,
 757                                                   struct ldb_reply *ares)
 758 {
 759 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
 760         struct replmd_replicated_request *ar = talloc_get_type(private_data,
 761                                                struct replmd_replicated_request);
 762
 763         ret = ldb_next_request(ar->module, ar->sub.change_req);
 764         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
 765
 766         ar->sub.change_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
 767         if (ar->sub.change_ret != LDB_SUCCESS) {
 768                 return replmd_replicated_request_error(ar, ar->sub.change_ret);
 769         }
 770
 771         talloc_free(ar->sub.mem_ctx);
 772         ZERO_STRUCT(ar->sub);
 773
 774         ar->index_current++;
 775
 776         return LDB_SUCCESS;
 777 #else
 778         return LDB_SUCCESS;
 779 #endif
 780 }
 781
 782 static int replmd_replicated_apply_merge(struct replmd_replicated_request *ar)
 783 {
 784         enum ndr_err_code ndr_err;
 785         struct ldb_message *msg;
 786         struct replPropertyMetaDataBlob *rmd;
 787         struct replPropertyMetaDataBlob omd;
 788         const struct ldb_val *omd_value;
 789         struct replPropertyMetaDataBlob nmd;
 790         struct ldb_val nmd_value;
 791         uint32_t i,j,ni=0;
 792         uint32_t removed_attrs = 0;
 793         uint64_t seq_num;
 794         int ret;
 795
 796         msg = ar->objs->objects[ar->index_current].msg;
 797         rmd = ar->objs->objects[ar->index_current].meta_data;
 798         ZERO_STRUCT(omd);
 799         omd.version = 1;
 800
 801         /*
 802          * TODO: add rename conflict handling
 803          */
 804         if (ldb_dn_compare(msg->dn, ar->sub.search_msg->dn) != 0) {
 805                 ldb_debug_set(ar->module->ldb, LDB_DEBUG_FATAL, "replmd_replicated_apply_merge[%u]: rename not supported",
 806                               ar->index_current);
 807                 ldb_debug(ar->module->ldb, LDB_DEBUG_FATAL, "%s => %s\n",
 808                           ldb_dn_get_linearized(ar->sub.search_msg->dn),
 809                           ldb_dn_get_linearized(msg->dn));
 810                 return replmd_replicated_request_werror(ar, WERR_NOT_SUPPORTED);
 811         }
 812
 813         ret = ldb_sequence_number(ar->module->ldb, LDB_SEQ_NEXT, &seq_num);
 814         if (ret != LDB_SUCCESS) {
 815                 return replmd_replicated_request_error(ar, ret);
 816         }
 817
 818         /* find existing meta data */
 819         omd_value = ldb_msg_find_ldb_val(ar->sub.search_msg, "replPropertyMetaData");
 820         if (omd_value) {
 821                 ndr_err = ndr_pull_struct_blob(omd_value, ar->sub.mem_ctx,
 822                                                lp_iconv_convenience(ldb_get_opaque(ar->module->ldb, "loadparm")), &omd,
 823                                                (ndr_pull_flags_fn_t)ndr_pull_replPropertyMetaDataBlob);
 824                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 825                         NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
 826                         return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
 827                 }
 828
 829                 if (omd.version != 1) {
 830                         return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
 831                 }
 832         }
 833
 834         ZERO_STRUCT(nmd);
 835         nmd.version = 1;
 836         nmd.ctr.ctr1.count = omd.ctr.ctr1.count + rmd->ctr.ctr1.count;
 837         nmd.ctr.ctr1.array = talloc_array(ar->sub.mem_ctx,
 838                                           struct replPropertyMetaData1,
 839                                           nmd.ctr.ctr1.count);
 840         if (!nmd.ctr.ctr1.array) return replmd_replicated_request_werror(ar, WERR_NOMEM);
 841
 842         /* first copy the old meta data */
 843         for (i=0; i < omd.ctr.ctr1.count; i++) {
 844                 nmd.ctr.ctr1.array[ni]  = omd.ctr.ctr1.array[i];
 845                 ni++;
 846         }
 847
 848         /* now merge in the new meta data */
 849         for (i=0; i < rmd->ctr.ctr1.count; i++) {
 850                 bool found = false;
 851
 852                 rmd->ctr.ctr1.array[i].local_usn = seq_num;
 853
 854                 for (j=0; j < ni; j++) {
 855                         int cmp;
 856
 857                         if (rmd->ctr.ctr1.array[i].attid != nmd.ctr.ctr1.array[j].attid) {
 858                                 continue;
 859                         }
 860
 861                         cmp = replmd_replPropertyMetaData1_conflict_compare(&rmd->ctr.ctr1.array[i],
 862                                                                             &nmd.ctr.ctr1.array[j]);
 863                         if (cmp > 0) {
 864                                 /* replace the entry */
 865                                 nmd.ctr.ctr1.array[j] = rmd->ctr.ctr1.array[i];
 866                                 found = true;
 867                                 break;
 868                         }
 869
 870                         /* we don't want to apply this change so remove the attribute */
 871                         ldb_msg_remove_element(msg, &msg->elements[i-removed_attrs]);
 872                         removed_attrs++;
 873
 874                         found = true;
 875                         break;
 876                 }
 877
 878                 if (found) continue;
 879
 880                 nmd.ctr.ctr1.array[ni] = rmd->ctr.ctr1.array[i];
 881                 ni++;
 882         }
 883
 884         /*
 885          * finally correct the size of the meta_data array
 886          */
 887         nmd.ctr.ctr1.count = ni;
 888
 889         /*
 890          * the rdn attribute (the alias for the name attribute),
 891          * 'cn' for most objects is the last entry in the meta data array
 892          * we have stored
 893          *
 894          * sort the new meta data array
 895          */
 896         {
 897                 struct replPropertyMetaData1 *rdn_p;
 898                 uint32_t rdn_idx = omd.ctr.ctr1.count - 1;
 899
 900                 rdn_p = &nmd.ctr.ctr1.array[rdn_idx];
 901                 replmd_replPropertyMetaDataCtr1_sort(&nmd.ctr.ctr1, &rdn_p->attid);
 902         }
 903
 904         /* create the meta data value */
 905         ndr_err = ndr_push_struct_blob(&nmd_value, msg,
 906                                        lp_iconv_convenience(ldb_get_opaque(ar->module->ldb, "loadparm")),
 907                                        &nmd,
 908                                        (ndr_push_flags_fn_t)ndr_push_replPropertyMetaDataBlob);
 909         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 910                 NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
 911                 return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
 912         }
 913
 914         /*
 915          * check if some replicated attributes left, otherwise skip the ldb_modify() call
 916          */
 917         if (msg->num_elements == 0) {
 918                 ldb_debug(ar->module->ldb, LDB_DEBUG_TRACE, "replmd_replicated_apply_merge[%u]: skip replace\n",
 919                           ar->index_current);
 920                 goto next_object;
 921         }
 922
 923         ldb_debug(ar->module->ldb, LDB_DEBUG_TRACE, "replmd_replicated_apply_merge[%u]: replace %u attributes\n",
 924                   ar->index_current, msg->num_elements);
 925
 926         /*
 927          * when we now that we'll modify the record, add the whenChanged, uSNChanged
 928          * and replPopertyMetaData attributes
 929          */
 930         ret = ldb_msg_add_string(msg, "whenChanged", ar->objs->objects[ar->index_current].when_changed);
 931         if (ret != LDB_SUCCESS) {
 932                 return replmd_replicated_request_error(ar, ret);
 933         }
 934         ret = samdb_msg_add_uint64(ar->module->ldb, msg, msg, "uSNChanged", seq_num);
 935         if (ret != LDB_SUCCESS) {
 936                 return replmd_replicated_request_error(ar, ret);
 937         }
 938         ret = ldb_msg_add_value(msg, "replPropertyMetaData", &nmd_value, NULL);
 939         if (ret != LDB_SUCCESS) {
 940                 return replmd_replicated_request_error(ar, ret);
 941         }
 942
 943         replmd_ldb_message_sort(msg, ar->schema);
 944
 945         /* we want to replace the old values */
 946         for (i=0; i < msg->num_elements; i++) {
 947                 msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
 948         }
 949
 950         ret = ldb_build_mod_req(&ar->sub.change_req,
 951                                 ar->module->ldb,
 952                                 ar->sub.mem_ctx,
 953                                 msg,
 954                                 NULL,
 955                                 ar,
 956                                 replmd_replicated_apply_merge_callback);
 957         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
 958
 959 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
 960         return ldb_next_request(ar->module, ar->sub.change_req);
 961 #else
 962         ret = ldb_next_request(ar->module, ar->sub.change_req);
 963         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
 964
 965         ar->sub.change_ret = ldb_wait(ar->sub.change_req->handle, LDB_WAIT_ALL);
 966         if (ar->sub.change_ret != LDB_SUCCESS) {
 967                 return replmd_replicated_request_error(ar, ar->sub.change_ret);
 968         }
 969
 970 next_object:
 971         talloc_free(ar->sub.mem_ctx);
 972         ZERO_STRUCT(ar->sub);
 973
 974         ar->index_current++;
 975
 976         return LDB_SUCCESS;
 977 #endif
 978 }
 979
 980 static int replmd_replicated_apply_search_callback(struct ldb_context *ldb,
 981                                                    void *private_data,
 982                                                    struct ldb_reply *ares)
 983 {
 984         struct replmd_replicated_request *ar = talloc_get_type(private_data,
 985                                                struct replmd_replicated_request);
 986         bool is_done = false;
 987
 988         switch (ares->type) {
 989         case LDB_REPLY_ENTRY:
 990                 ar->sub.search_msg = talloc_steal(ar->sub.mem_ctx, ares->message);
 991                 break;
 992         case LDB_REPLY_REFERRAL:
 993                 /* we ignore referrals */
 994                 break;
 995         case LDB_REPLY_EXTENDED:
 996         case LDB_REPLY_DONE:
 997                 is_done = true;
 998         }
 999
1000         talloc_free(ares);
1001
1002 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
1003         if (is_done) {
1004                 ar->sub.search_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
1005                 if (ar->sub.search_ret != LDB_SUCCESS) {
1006                         return replmd_replicated_request_error(ar, ar->sub.search_ret);
1007                 }
1008                 if (ar->sub.search_msg) {
1009                         return replmd_replicated_apply_merge(ar);
1010                 }
1011                 return replmd_replicated_apply_add(ar);
1012         }
1013 #endif
1014         return LDB_SUCCESS;
1015 }
1016
1017 static int replmd_replicated_apply_search(struct replmd_replicated_request *ar)
1018 {
1019         int ret;
1020         char *tmp_str;
1021         char *filter;
1022
1023         tmp_str = ldb_binary_encode(ar->sub.mem_ctx, ar->objs->objects[ar->index_current].guid_value);
1024         if (!tmp_str) return replmd_replicated_request_werror(ar, WERR_NOMEM);
1025
1026         filter = talloc_asprintf(ar->sub.mem_ctx, "(objectGUID=%s)", tmp_str);
1027         if (!filter) return replmd_replicated_request_werror(ar, WERR_NOMEM);
1028         talloc_free(tmp_str);
1029
1030         ret = ldb_build_search_req(&ar->sub.search_req,
1031                                    ar->module->ldb,
1032                                    ar->sub.mem_ctx,
1033                                    ar->objs->partition_dn,
1034                                    LDB_SCOPE_SUBTREE,
1035                                    filter,
1036                                    NULL,
1037                                    NULL,
1038                                    ar,
1039                                    replmd_replicated_apply_search_callback);
1040         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1041
1042 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
1043         return ldb_next_request(ar->module, ar->sub.search_req);
1044 #else
1045         ret = ldb_next_request(ar->module, ar->sub.search_req);
1046         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1047
1048         ar->sub.search_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
1049         if (ar->sub.search_ret != LDB_SUCCESS && ar->sub.search_ret != LDB_ERR_NO_SUCH_OBJECT) {
1050                 return replmd_replicated_request_error(ar, ar->sub.search_ret);
1051         }
1052         if (ar->sub.search_msg) {
1053                 return replmd_replicated_apply_merge(ar);
1054         }
1055
1056         return replmd_replicated_apply_add(ar);
1057 #endif
1058 }
1059
1060 static int replmd_replicated_apply_next(struct replmd_replicated_request *ar)
1061 {
1062 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
1063         if (ar->index_current >= ar->objs->num_objects) {
1064                 return replmd_replicated_uptodate_vector(ar);
1065         }
1066 #endif
1067
1068         ar->sub.mem_ctx = talloc_new(ar);
1069         if (!ar->sub.mem_ctx) return replmd_replicated_request_werror(ar, WERR_NOMEM);
1070
1071         return replmd_replicated_apply_search(ar);
1072 }
1073
1074 static int replmd_replicated_uptodate_modify_callback(struct ldb_context *ldb,
1075                                                       void *private_data,
1076                                                       struct ldb_reply *ares)
1077 {
1078 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
1079         struct replmd_replicated_request *ar = talloc_get_type(private_data,
1080                                                struct replmd_replicated_request);
1081
1082         ar->sub.change_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
1083         if (ar->sub.change_ret != LDB_SUCCESS) {
1084                 return replmd_replicated_request_error(ar, ar->sub.change_ret);
1085         }
1086
1087         talloc_free(ar->sub.mem_ctx);
1088         ZERO_STRUCT(ar->sub);
1089
1090         return replmd_replicated_request_done(ar);
1091 #else
1092         return LDB_SUCCESS;
1093 #endif
1094 }
1095
1096 static int replmd_drsuapi_DsReplicaCursor2_compare(const struct drsuapi_DsReplicaCursor2 *c1,
1097                                                    const struct drsuapi_DsReplicaCursor2 *c2)
1098 {
1099         return GUID_compare(&c1->source_dsa_invocation_id, &c2->source_dsa_invocation_id);
1100 }
1101
1102 static int replmd_replicated_uptodate_modify(struct replmd_replicated_request *ar)
1103 {
1104         enum ndr_err_code ndr_err;
1105         struct ldb_message *msg;
1106         struct replUpToDateVectorBlob ouv;
1107         const struct ldb_val *ouv_value;
1108         const struct drsuapi_DsReplicaCursor2CtrEx *ruv;
1109         struct replUpToDateVectorBlob nuv;
1110         struct ldb_val nuv_value;
1111         struct ldb_message_element *nuv_el = NULL;
1112         const struct GUID *our_invocation_id;
1113         struct ldb_message_element *orf_el = NULL;
1114         struct repsFromToBlob nrf;
1115         struct ldb_val *nrf_value = NULL;
1116         struct ldb_message_element *nrf_el = NULL;
1117         uint32_t i,j,ni=0;
1118         uint64_t seq_num;
1119         bool found = false;
1120         time_t t = time(NULL);
1121         NTTIME now;
1122         int ret;
1123
1124         ruv = ar->objs->uptodateness_vector;
1125         ZERO_STRUCT(ouv);
1126         ouv.version = 2;
1127         ZERO_STRUCT(nuv);
1128         nuv.version = 2;
1129
1130         unix_to_nt_time(&now, t);
1131
1132         /*
1133          * we use the next sequence number for our own highest_usn
1134          * because we will do a modify request and this will increment
1135          * our highest_usn
1136          */
1137         ret = ldb_sequence_number(ar->module->ldb, LDB_SEQ_NEXT, &seq_num);
1138         if (ret != LDB_SUCCESS) {
1139                 return replmd_replicated_request_error(ar, ret);
1140         }
1141
1142         /*
1143          * first create the new replUpToDateVector
1144          */
1145         ouv_value = ldb_msg_find_ldb_val(ar->sub.search_msg, "replUpToDateVector");
1146         if (ouv_value) {
1147                 ndr_err = ndr_pull_struct_blob(ouv_value, ar->sub.mem_ctx,
1148                                                lp_iconv_convenience(ldb_get_opaque(ar->module->ldb, "loadparm")), &ouv,
1149                                                (ndr_pull_flags_fn_t)ndr_pull_replUpToDateVectorBlob);
1150                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1151                         NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
1152                         return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
1153                 }
1154
1155                 if (ouv.version != 2) {
1156                         return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
1157                 }
1158         }
1159
1160         /*
1161          * the new uptodateness vector will at least
1162          * contain 1 entry, one for the source_dsa
1163          *
1164          * plus optional values from our old vector and the one from the source_dsa
1165          */
1166         nuv.ctr.ctr2.count = 1 + ouv.ctr.ctr2.count;
1167         if (ruv) nuv.ctr.ctr2.count += ruv->count;
1168         nuv.ctr.ctr2.cursors = talloc_array(ar->sub.mem_ctx,
1169                                             struct drsuapi_DsReplicaCursor2,
1170                                             nuv.ctr.ctr2.count);
1171         if (!nuv.ctr.ctr2.cursors) return replmd_replicated_request_werror(ar, WERR_NOMEM);
1172
1173         /* first copy the old vector */
1174         for (i=0; i < ouv.ctr.ctr2.count; i++) {
1175                 nuv.ctr.ctr2.cursors[ni] = ouv.ctr.ctr2.cursors[i];
1176                 ni++;
1177         }
1178
1179         /* get our invocation_id if we have one already attached to the ldb */
1180         our_invocation_id = samdb_ntds_invocation_id(ar->module->ldb);
1181
1182         /* merge in the source_dsa vector is available */
1183         for (i=0; (ruv && i < ruv->count); i++) {
1184                 found = false;
1185
1186                 if (our_invocation_id &&
1187                     GUID_equal(&ruv->cursors[i].source_dsa_invocation_id,
1188                                our_invocation_id)) {
1189                         continue;
1190                 }
1191
1192                 for (j=0; j < ni; j++) {
1193                         if (!GUID_equal(&ruv->cursors[i].source_dsa_invocation_id,
1194                                         &nuv.ctr.ctr2.cursors[j].source_dsa_invocation_id)) {
1195                                 continue;
1196                         }
1197
1198                         found = true;
1199
1200                         /*
1201                          * we update only the highest_usn and not the latest_sync_success time,
1202                          * because the last success stands for direct replication
1203                          */
1204                         if (ruv->cursors[i].highest_usn > nuv.ctr.ctr2.cursors[j].highest_usn) {
1205                                 nuv.ctr.ctr2.cursors[j].highest_usn = ruv->cursors[i].highest_usn;
1206                         }
1207                         break;
1208                 }
1209
1210                 if (found) continue;
1211
1212                 /* if it's not there yet, add it */
1213                 nuv.ctr.ctr2.cursors[ni] = ruv->cursors[i];
1214                 ni++;
1215         }
1216
1217         /*
1218          * merge in the current highwatermark for the source_dsa
1219          */
1220         found = false;
1221         for (j=0; j < ni; j++) {
1222                 if (!GUID_equal(&ar->objs->source_dsa->source_dsa_invocation_id,
1223                                 &nuv.ctr.ctr2.cursors[j].source_dsa_invocation_id)) {
1224                         continue;
1225                 }
1226
1227                 found = true;
1228
1229                 /*
1230                  * here we update the highest_usn and last_sync_success time
1231                  * because we're directly replicating from the source_dsa
1232                  *
1233                  * and use the tmp_highest_usn because this is what we have just applied
1234                  * to our ldb
1235                  */
1236                 nuv.ctr.ctr2.cursors[j].highest_usn             = ar->objs->source_dsa->highwatermark.tmp_highest_usn;
1237                 nuv.ctr.ctr2.cursors[j].last_sync_success       = now;
1238                 break;
1239         }
1240         if (!found) {
1241                 /*
1242                  * here we update the highest_usn and last_sync_success time
1243                  * because we're directly replicating from the source_dsa
1244                  *
1245                  * and use the tmp_highest_usn because this is what we have just applied
1246                  * to our ldb
1247                  */
1248                 nuv.ctr.ctr2.cursors[ni].source_dsa_invocation_id= ar->objs->source_dsa->source_dsa_invocation_id;
1249                 nuv.ctr.ctr2.cursors[ni].highest_usn            = ar->objs->source_dsa->highwatermark.tmp_highest_usn;
1250                 nuv.ctr.ctr2.cursors[ni].last_sync_success      = now;
1251                 ni++;
1252         }
1253
1254         /*
1255          * finally correct the size of the cursors array
1256          */
1257         nuv.ctr.ctr2.count = ni;
1258
1259         /*
1260          * sort the cursors
1261          */
1262         qsort(nuv.ctr.ctr2.cursors, nuv.ctr.ctr2.count,
1263               sizeof(struct drsuapi_DsReplicaCursor2),
1264               (comparison_fn_t)replmd_drsuapi_DsReplicaCursor2_compare);
1265
1266         /*
1267          * create the change ldb_message
1268          */
1269         msg = ldb_msg_new(ar->sub.mem_ctx);
1270         if (!msg) return replmd_replicated_request_werror(ar, WERR_NOMEM);
1271         msg->dn = ar->sub.search_msg->dn;
1272
1273         ndr_err = ndr_push_struct_blob(&nuv_value, msg,
1274                                        lp_iconv_convenience(ldb_get_opaque(ar->module->ldb, "loadparm")),
1275                                        &nuv,
1276                                        (ndr_push_flags_fn_t)ndr_push_replUpToDateVectorBlob);
1277         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1278                 NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
1279                 return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
1280         }
1281         ret = ldb_msg_add_value(msg, "replUpToDateVector", &nuv_value, &nuv_el);
1282         if (ret != LDB_SUCCESS) {
1283                 return replmd_replicated_request_error(ar, ret);
1284         }
1285         nuv_el->flags = LDB_FLAG_MOD_REPLACE;
1286
1287         /*
1288          * now create the new repsFrom value from the given repsFromTo1 structure
1289          */
1290         ZERO_STRUCT(nrf);
1291         nrf.version                                     = 1;
1292         nrf.ctr.ctr1                                    = *ar->objs->source_dsa;
1293         /* and fix some values... */
1294         nrf.ctr.ctr1.consecutive_sync_failures          = 0;
1295         nrf.ctr.ctr1.last_success                       = now;
1296         nrf.ctr.ctr1.last_attempt                       = now;
1297         nrf.ctr.ctr1.result_last_attempt                = WERR_OK;
1298         nrf.ctr.ctr1.highwatermark.highest_usn          = nrf.ctr.ctr1.highwatermark.tmp_highest_usn;
1299
1300         /*
1301          * first see if we already have a repsFrom value for the current source dsa
1302          * if so we'll later replace this value
1303          */
1304         orf_el = ldb_msg_find_element(ar->sub.search_msg, "repsFrom");
1305         if (orf_el) {
1306                 for (i=0; i < orf_el->num_values; i++) {
1307                         struct repsFromToBlob *trf;
1308
1309                         trf = talloc(ar->sub.mem_ctx, struct repsFromToBlob);
1310                         if (!trf) return replmd_replicated_request_werror(ar, WERR_NOMEM);
1311
1312                         ndr_err = ndr_pull_struct_blob(&orf_el->values[i], trf, lp_iconv_convenience(ldb_get_opaque(ar->module->ldb, "loadparm")), trf,
1313                                                        (ndr_pull_flags_fn_t)ndr_pull_repsFromToBlob);
1314                         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1315                                 NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
1316                                 return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
1317                         }
1318
1319                         if (trf->version != 1) {
1320                                 return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
1321                         }
1322
1323                         /*
1324                          * we compare the source dsa objectGUID not the invocation_id
1325                          * because we want only one repsFrom value per source dsa
1326                          * and when the invocation_id of the source dsa has changed we don't need
1327                          * the old repsFrom with the old invocation_id
1328                          */
1329                         if (!GUID_equal(&trf->ctr.ctr1.source_dsa_obj_guid,
1330                                         &ar->objs->source_dsa->source_dsa_obj_guid)) {
1331                                 talloc_free(trf);
1332                                 continue;
1333                         }
1334
1335                         talloc_free(trf);
1336                         nrf_value = &orf_el->values[i];
1337                         break;
1338                 }
1339
1340                 /*
1341                  * copy over all old values to the new ldb_message
1342                  */
1343                 ret = ldb_msg_add_empty(msg, "repsFrom", 0, &nrf_el);
1344                 if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1345                 *nrf_el = *orf_el;
1346         }
1347
1348         /*
1349          * if we haven't found an old repsFrom value for the current source dsa
1350          * we'll add a new value
1351          */
1352         if (!nrf_value) {
1353                 struct ldb_val zero_value;
1354                 ZERO_STRUCT(zero_value);
1355                 ret = ldb_msg_add_value(msg, "repsFrom", &zero_value, &nrf_el);
1356                 if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1357
1358                 nrf_value = &nrf_el->values[nrf_el->num_values - 1];
1359         }
1360
1361         /* we now fill the value which is already attached to ldb_message */
1362         ndr_err = ndr_push_struct_blob(nrf_value, msg,
1363                                        lp_iconv_convenience(ldb_get_opaque(ar->module->ldb, "loadparm")),
1364                                        &nrf,
1365                                        (ndr_push_flags_fn_t)ndr_push_repsFromToBlob);
1366         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1367                 NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
1368                 return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
1369         }
1370
1371         /*
1372          * the ldb_message_element for the attribute, has all the old values and the new one
1373          * so we'll replace the whole attribute with all values
1374          */
1375         nrf_el->flags = LDB_FLAG_MOD_REPLACE;
1376
1377         /* prepare the ldb_modify() request */
1378         ret = ldb_build_mod_req(&ar->sub.change_req,
1379                                 ar->module->ldb,
1380                                 ar->sub.mem_ctx,
1381                                 msg,
1382                                 NULL,
1383                                 ar,
1384                                 replmd_replicated_uptodate_modify_callback);
1385         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1386
1387 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
1388         return ldb_next_request(ar->module, ar->sub.change_req);
1389 #else
1390         ret = ldb_next_request(ar->module, ar->sub.change_req);
1391         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1392
1393         ar->sub.change_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
1394         if (ar->sub.change_ret != LDB_SUCCESS) {
1395                 return replmd_replicated_request_error(ar, ar->sub.change_ret);
1396         }
1397
1398         talloc_free(ar->sub.mem_ctx);
1399         ZERO_STRUCT(ar->sub);
1400
1401         return replmd_replicated_request_done(ar);
1402 #endif
1403 }
1404
1405 static int replmd_replicated_uptodate_search_callback(struct ldb_context *ldb,
1406                                                       void *private_data,
1407                                                       struct ldb_reply *ares)
1408 {
1409         struct replmd_replicated_request *ar = talloc_get_type(private_data,
1410                                                struct replmd_replicated_request);
1411         bool is_done = false;
1412
1413         switch (ares->type) {
1414         case LDB_REPLY_ENTRY:
1415                 ar->sub.search_msg = talloc_steal(ar->sub.mem_ctx, ares->message);
1416                 break;
1417         case LDB_REPLY_REFERRAL:
1418                 /* we ignore referrals */
1419                 break;
1420         case LDB_REPLY_EXTENDED:
1421         case LDB_REPLY_DONE:
1422                 is_done = true;
1423         }
1424
1425         talloc_free(ares);
1426
1427 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
1428         if (is_done) {
1429                 ar->sub.search_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
1430                 if (ar->sub.search_ret != LDB_SUCCESS) {
1431                         return replmd_replicated_request_error(ar, ar->sub.search_ret);
1432                 }
1433                 if (!ar->sub.search_msg) {
1434                         return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
1435                 }
1436
1437                 return replmd_replicated_uptodate_modify(ar);
1438         }
1439 #endif
1440         return LDB_SUCCESS;
1441 }
1442
1443 static int replmd_replicated_uptodate_search(struct replmd_replicated_request *ar)
1444 {
1445         int ret;
1446         static const char *attrs[] = {
1447                 "replUpToDateVector",
1448                 "repsFrom",
1449                 NULL
1450         };
1451
1452         ret = ldb_build_search_req(&ar->sub.search_req,
1453                                    ar->module->ldb,
1454                                    ar->sub.mem_ctx,
1455                                    ar->objs->partition_dn,
1456                                    LDB_SCOPE_BASE,
1457                                    "(objectClass=*)",
1458                                    attrs,
1459                                    NULL,
1460                                    ar,
1461                                    replmd_replicated_uptodate_search_callback);
1462         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1463
1464 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
1465         return ldb_next_request(ar->module, ar->sub.search_req);
1466 #else
1467         ret = ldb_next_request(ar->module, ar->sub.search_req);
1468         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1469
1470         ar->sub.search_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
1471         if (ar->sub.search_ret != LDB_SUCCESS) {
1472                 return replmd_replicated_request_error(ar, ar->sub.search_ret);
1473         }
1474         if (!ar->sub.search_msg) {
1475                 return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
1476         }
1477
1478         return replmd_replicated_uptodate_modify(ar);
1479 #endif
1480 }
1481
1482 static int replmd_replicated_uptodate_vector(struct replmd_replicated_request *ar)
1483 {
1484         ar->sub.mem_ctx = talloc_new(ar);
1485         if (!ar->sub.mem_ctx) return replmd_replicated_request_werror(ar, WERR_NOMEM);
1486
1487         return replmd_replicated_uptodate_search(ar);
1488 }
1489
1490 static int replmd_extended_replicated_objects(struct ldb_module *module, struct ldb_request *req)
1491 {
1492         struct dsdb_extended_replicated_objects *objs;
1493         struct replmd_replicated_request *ar;
1494
1495         ldb_debug(module->ldb, LDB_DEBUG_TRACE, "replmd_extended_replicated_objects\n");
1496
1497         objs = talloc_get_type(req->op.extended.data, struct dsdb_extended_replicated_objects);
1498         if (!objs) {
1499                 ldb_debug(module->ldb, LDB_DEBUG_FATAL, "replmd_extended_replicated_objects: invalid extended data\n");
1500                 return LDB_ERR_PROTOCOL_ERROR;
1501         }
1502
1503         if (objs->version != DSDB_EXTENDED_REPLICATED_OBJECTS_VERSION) {
1504                 ldb_debug(module->ldb, LDB_DEBUG_FATAL, "replmd_extended_replicated_objects: extended data invalid version [%u != %u]\n",
1505                           objs->version, DSDB_EXTENDED_REPLICATED_OBJECTS_VERSION);
1506                 return LDB_ERR_PROTOCOL_ERROR;
1507         }
1508
1509         ar = replmd_replicated_init_handle(module, req, objs);
1510         if (!ar) {
1511                 return LDB_ERR_OPERATIONS_ERROR;
1512         }
1513
1514 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
1515         return replmd_replicated_apply_next(ar);
1516 #else
1517         while (ar->index_current < ar->objs->num_objects &&
1518                req->handle->state != LDB_ASYNC_DONE) {
1519                 replmd_replicated_apply_next(ar);
1520         }
1521
1522         if (req->handle->state != LDB_ASYNC_DONE) {
1523                 replmd_replicated_uptodate_vector(ar);
1524         }
1525
1526         return LDB_SUCCESS;
1527 #endif
1528 }
1529
1530 static int replmd_extended(struct ldb_module *module, struct ldb_request *req)
1531 {
1532         if (strcmp(req->op.extended.oid, DSDB_EXTENDED_REPLICATED_OBJECTS_OID) == 0) {
1533                 return replmd_extended_replicated_objects(module, req);
1534         }
1535
1536         return ldb_next_request(module, req);
1537 }
1538
1539 static int replmd_wait_none(struct ldb_handle *handle) {
1540         struct replmd_replicated_request *ar;
1541
1542         if (!handle || !handle->private_data) {
1543                 return LDB_ERR_OPERATIONS_ERROR;
1544         }
1545
1546         ar = talloc_get_type(handle->private_data, struct replmd_replicated_request);
1547         if (!ar) {
1548                 return LDB_ERR_OPERATIONS_ERROR;
1549         }
1550
1551         /* we do only sync calls */
1552         if (handle->state != LDB_ASYNC_DONE) {
1553                 return LDB_ERR_OPERATIONS_ERROR;
1554         }
1555
1556         return handle->status;
1557 }
1558
1559 static int replmd_wait_all(struct ldb_handle *handle) {
1560
1561         int ret;
1562
1563         while (handle->state != LDB_ASYNC_DONE) {
1564                 ret = replmd_wait_none(handle);
1565                 if (ret != LDB_SUCCESS) {
1566                         return ret;
1567                 }
1568         }
1569
1570         return handle->status;
1571 }
1572
1573 static int replmd_wait(struct ldb_handle *handle, enum ldb_wait_type type)
1574 {
1575         if (type == LDB_WAIT_ALL) {
1576                 return replmd_wait_all(handle);
1577         } else {
1578                 return replmd_wait_none(handle);
1579         }
1580 }
1581
1582 _PUBLIC_ const struct ldb_module_ops ldb_repl_meta_data_module_ops = {
1583         .name          = "repl_meta_data",
1584         .add           = replmd_add,
1585         .modify        = replmd_modify,
1586         .extended      = replmd_extended,
1587         .wait          = replmd_wait
1588 };