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, write to the Free Software
  25    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  26 */
  27
  28 /*
  29  *  Name: ldb
  30  *
  31  *  Component: ldb repl_meta_data module
  32  *
  33  *  Description: - add a unique objectGUID onto every new record,
  34  *               - handle whenCreated, whenChanged timestamps
  35  *               - handle uSNCreated, uSNChanged numbers
  36  *               - handle replPropertyMetaData attribute
  37  *
  38  *  Author: Simo Sorce
  39  *  Author: Stefan Metzmacher
  40  */
  41
  42 #include "includes.h"
  43 #include "lib/ldb/include/ldb.h"
  44 #include "lib/ldb/include/ldb_errors.h"
  45 #include "lib/ldb/include/ldb_private.h"
  46 #include "dsdb/samdb/samdb.h"
  47 #include "dsdb/common/flags.h"
  48 #include "librpc/gen_ndr/ndr_misc.h"
  49 #include "librpc/gen_ndr/ndr_drsuapi.h"
  50 #include "librpc/gen_ndr/ndr_drsblobs.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                                                 const struct dsdb_control_current_partition *))
 245 {
 246         const struct dsdb_schema *schema;
 247         const struct ldb_control *partition_ctrl;
 248         const struct dsdb_control_current_partition *partition;
 249
 250         /* do not manipulate our control entries */
 251         if (ldb_dn_is_special(dn)) {
 252                 return ldb_next_request(module, req);
 253         }
 254
 255         schema = dsdb_get_schema(module->ldb);
 256         if (!schema) {
 257                 ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
 258                               "%s: no dsdb_schema loaded",
 259                               fn_name);
 260                 return LDB_ERR_CONSTRAINT_VIOLATION;
 261         }
 262
 263         partition_ctrl = ldb_request_get_control(req, DSDB_CONTROL_CURRENT_PARTITION_OID);
 264         if (!partition_ctrl) {
 265                 ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
 266                               "%s: no current partition control found",
 267                               fn_name);
 268                 return LDB_ERR_CONSTRAINT_VIOLATION;
 269         }
 270
 271         partition = talloc_get_type(partition_ctrl->data,
 272                                     struct dsdb_control_current_partition);
 273         if (!partition) {
 274                 ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
 275                               "%s: current partition control contains invalid data",
 276                               fn_name);
 277                 return LDB_ERR_CONSTRAINT_VIOLATION;
 278         }
 279
 280         if (partition->version != DSDB_CONTROL_CURRENT_PARTITION_VERSION) {
 281                 ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
 282                               "%s: current partition control contains invalid version [%u != %u]\n",
 283                               fn_name, partition->version, DSDB_CONTROL_CURRENT_PARTITION_VERSION);
 284                 return LDB_ERR_CONSTRAINT_VIOLATION;
 285         }
 286
 287         return fn(module, req, schema, partition);
 288 }
 289
 290 static int replmd_add_originating(struct ldb_module *module,
 291                                   struct ldb_request *req,
 292                                   const struct dsdb_schema *schema,
 293                                   const struct dsdb_control_current_partition *partition)
 294 {
 295         NTSTATUS nt_status;
 296         struct ldb_request *down_req;
 297         struct ldb_message *msg;
 298         uint32_t instance_type;
 299         struct ldb_dn *new_dn;
 300         const char *rdn_name;
 301         const char *rdn_name_upper;
 302         const struct ldb_val *rdn_value = NULL;
 303         const struct dsdb_attribute *rdn_attr = NULL;
 304         struct GUID guid;
 305         struct ldb_val guid_value;
 306         struct replPropertyMetaDataBlob nmd;
 307         struct ldb_val nmd_value;
 308         uint64_t seq_num;
 309         const struct GUID *our_invocation_id;
 310         time_t t = time(NULL);
 311         NTTIME now;
 312         char *time_str;
 313         int ret;
 314         uint32_t i, ni=0;
 315
 316         ldb_debug(module->ldb, LDB_DEBUG_TRACE, "replmd_add_originating\n");
 317
 318         if (ldb_msg_find_element(req->op.add.message, "objectGUID")) {
 319                 ldb_debug_set(module->ldb, LDB_DEBUG_ERROR,
 320                               "replmd_add_originating: it's not allowed to add an object with objectGUID\n");
 321                 return LDB_ERR_UNWILLING_TO_PERFORM;
 322         }
 323
 324         if (ldb_msg_find_element(req->op.add.message, "instanceType")) {
 325                 ldb_debug_set(module->ldb, LDB_DEBUG_ERROR,
 326                               "replmd_add_originating: it's not allowed to add an object with instanceType\n");
 327                 return LDB_ERR_UNWILLING_TO_PERFORM;
 328         }
 329
 330         /* Get a sequence number from the backend */
 331         ret = ldb_sequence_number(module->ldb, LDB_SEQ_NEXT, &seq_num);
 332         if (ret != LDB_SUCCESS) {
 333                 return ret;
 334         }
 335
 336         /* a new GUID */
 337         guid = GUID_random();
 338
 339         /* get our invicationId */
 340         our_invocation_id = samdb_ntds_invocation_id(module->ldb);
 341         if (!our_invocation_id) {
 342                 ldb_debug_set(module->ldb, LDB_DEBUG_ERROR,
 343                               "replmd_add_originating: unable to find invocationId\n");
 344                 return LDB_ERR_OPERATIONS_ERROR;
 345         }
 346
 347         /* create a copy of the request */
 348         down_req = talloc(req, struct ldb_request);
 349         if (down_req == NULL) {
 350                 ldb_oom(module->ldb);
 351                 return LDB_ERR_OPERATIONS_ERROR;
 352         }
 353         *down_req = *req;
 354
 355         /* we have to copy the message as the caller might have it as a const */
 356         down_req->op.add.message = msg = ldb_msg_copy_shallow(down_req, req->op.add.message);
 357         if (msg == NULL) {
 358                 talloc_free(down_req);
 359                 ldb_oom(module->ldb);
 360                 return LDB_ERR_OPERATIONS_ERROR;
 361         }
 362
 363         /* generated times */
 364         unix_to_nt_time(&now, t);
 365         time_str = ldb_timestring(msg, t);
 366         if (!time_str) {
 367                 talloc_free(down_req);
 368                 return LDB_ERR_OPERATIONS_ERROR;
 369         }
 370
 371         /*
 372          * get details of the rdn name
 373          */
 374         rdn_name        = ldb_dn_get_rdn_name(msg->dn);
 375         if (!rdn_name) {
 376                 talloc_free(down_req);
 377                 ldb_oom(module->ldb);
 378                 return LDB_ERR_OPERATIONS_ERROR;
 379         }
 380         rdn_attr        = dsdb_attribute_by_lDAPDisplayName(schema, rdn_name);
 381         if (!rdn_attr) {
 382                 talloc_free(down_req);
 383                 return LDB_ERR_OPERATIONS_ERROR;
 384         }
 385         rdn_value       = ldb_dn_get_rdn_val(msg->dn);
 386         if (!rdn_value) {
 387                 talloc_free(down_req);
 388                 ldb_oom(module->ldb);
 389                 return LDB_ERR_OPERATIONS_ERROR;
 390         }
 391
 392         /*
 393          * remove autogenerated attributes
 394          */
 395         ldb_msg_remove_attr(msg, rdn_name);
 396         ldb_msg_remove_attr(msg, "name");
 397         ldb_msg_remove_attr(msg, "whenCreated");
 398         ldb_msg_remove_attr(msg, "whenChanged");
 399         ldb_msg_remove_attr(msg, "uSNCreated");
 400         ldb_msg_remove_attr(msg, "uSNChanged");
 401         ldb_msg_remove_attr(msg, "replPropertyMetaData");
 402
 403         /*
 404          * TODO: construct a new DN out of:
 405          *       - the parent DN
 406          *       - the upper case of rdn_attr->LDAPDisplayName
 407          *       - rdn_value
 408          */
 409         new_dn = ldb_dn_copy(msg, msg->dn);
 410         if (!new_dn) {
 411                 talloc_free(down_req);
 412                 ldb_oom(module->ldb);
 413                 return LDB_ERR_OPERATIONS_ERROR;
 414         }
 415         rdn_name_upper = strupper_talloc(msg, rdn_attr->lDAPDisplayName);
 416         if (!rdn_name_upper) {
 417                 talloc_free(down_req);
 418                 ldb_oom(module->ldb);
 419                 return LDB_ERR_OPERATIONS_ERROR;
 420         }
 421         ret = ldb_dn_set_component(new_dn, 0, rdn_name_upper, *rdn_value);
 422         if (ret != LDB_SUCCESS) {
 423                 talloc_free(down_req);
 424                 ldb_oom(module->ldb);
 425                 return LDB_ERR_OPERATIONS_ERROR;
 426         }
 427         msg->dn = new_dn;
 428
 429         /*
 430          * TODO: calculate correct instance type
 431          */
 432         instance_type = INSTANCE_TYPE_WRITE;
 433         if (ldb_dn_compare(partition->dn, msg->dn) == 0) {
 434                 instance_type |= INSTANCE_TYPE_IS_NC_HEAD;
 435                 if (ldb_dn_compare(msg->dn, samdb_base_dn(module->ldb)) != 0) {
 436                         instance_type |= INSTANCE_TYPE_NC_ABOVE;
 437                 }
 438         }
 439
 440         /*
 441          * readd replicated attributes
 442          */
 443         ret = ldb_msg_add_value(msg, rdn_attr->lDAPDisplayName, rdn_value, NULL);
 444         if (ret != LDB_SUCCESS) {
 445                 talloc_free(down_req);
 446                 ldb_oom(module->ldb);
 447                 return LDB_ERR_OPERATIONS_ERROR;
 448         }
 449         ret = ldb_msg_add_value(msg, "name", rdn_value, NULL);
 450         if (ret != LDB_SUCCESS) {
 451                 talloc_free(down_req);
 452                 ldb_oom(module->ldb);
 453                 return LDB_ERR_OPERATIONS_ERROR;
 454         }
 455         ret = ldb_msg_add_string(msg, "whenCreated", time_str);
 456         if (ret != LDB_SUCCESS) {
 457                 talloc_free(down_req);
 458                 ldb_oom(module->ldb);
 459                 return LDB_ERR_OPERATIONS_ERROR;
 460         }
 461         ret = ldb_msg_add_fmt(msg, "instanceType", "%u", instance_type);
 462         if (ret != LDB_SUCCESS) {
 463                 talloc_free(down_req);
 464                 ldb_oom(module->ldb);
 465                 return LDB_ERR_OPERATIONS_ERROR;
 466         }
 467
 468         /* build the replication meta_data */
 469         ZERO_STRUCT(nmd);
 470         nmd.version             = 1;
 471         nmd.ctr.ctr1.count      = msg->num_elements;
 472         nmd.ctr.ctr1.array      = talloc_array(msg,
 473                                                struct replPropertyMetaData1,
 474                                                nmd.ctr.ctr1.count);
 475         if (!nmd.ctr.ctr1.array) {
 476                 talloc_free(down_req);
 477                 ldb_oom(module->ldb);
 478                 return LDB_ERR_OPERATIONS_ERROR;
 479         }
 480
 481         for (i=0; i < msg->num_elements; i++) {
 482                 struct ldb_message_element *e = &msg->elements[i];
 483                 struct replPropertyMetaData1 *m = &nmd.ctr.ctr1.array[ni];
 484                 const struct dsdb_attribute *sa;
 485
 486                 if (e->name[0] == '@') continue;
 487
 488                 sa = dsdb_attribute_by_lDAPDisplayName(schema, e->name);
 489                 if (!sa) {
 490                         ldb_debug_set(module->ldb, LDB_DEBUG_ERROR,
 491                                       "replmd_add_originating: attribute '%s' not defined in schema\n",
 492                                       e->name);
 493                         talloc_free(down_req);
 494                         return LDB_ERR_NO_SUCH_ATTRIBUTE;
 495                 }
 496
 497                 if ((sa->systemFlags & 0x00000001) || (sa->systemFlags & 0x00000004)) {
 498                         /* if the attribute is not replicated (0x00000001)
 499                          * or constructed (0x00000004) it has no metadata
 500                          */
 501                         continue;
 502                 }
 503
 504                 m->attid                        = sa->attributeID_id;
 505                 m->version                      = 1;
 506                 m->originating_change_time      = now;
 507                 m->originating_invocation_id    = *our_invocation_id;
 508                 m->originating_usn              = seq_num;
 509                 m->local_usn                    = seq_num;
 510                 ni++;
 511         }
 512
 513         /* fix meta data count */
 514         nmd.ctr.ctr1.count = ni;
 515
 516         /*
 517          * sort meta data array, and move the rdn attribute entry to the end
 518          */
 519         replmd_replPropertyMetaDataCtr1_sort(&nmd.ctr.ctr1, &rdn_attr->attributeID_id);
 520
 521         /* generated NDR encoded values */
 522         nt_status = ndr_push_struct_blob(&guid_value, msg, &guid,
 523                                          (ndr_push_flags_fn_t)ndr_push_GUID);
 524         if (!NT_STATUS_IS_OK(nt_status)) {
 525                 talloc_free(down_req);
 526                 ldb_oom(module->ldb);
 527                 return LDB_ERR_OPERATIONS_ERROR;
 528         }
 529         nt_status = ndr_push_struct_blob(&nmd_value, msg, &nmd,
 530                                          (ndr_push_flags_fn_t)ndr_push_replPropertyMetaDataBlob);
 531         if (!NT_STATUS_IS_OK(nt_status)) {
 532                 talloc_free(down_req);
 533                 ldb_oom(module->ldb);
 534                 return LDB_ERR_OPERATIONS_ERROR;
 535         }
 536
 537         /*
 538          * add the autogenerated values
 539          */
 540         ret = ldb_msg_add_value(msg, "objectGUID", &guid_value, NULL);
 541         if (ret != LDB_SUCCESS) {
 542                 talloc_free(down_req);
 543                 ldb_oom(module->ldb);
 544                 return LDB_ERR_OPERATIONS_ERROR;
 545         }
 546         ret = ldb_msg_add_string(msg, "whenChanged", time_str);
 547         if (ret != LDB_SUCCESS) {
 548                 talloc_free(down_req);
 549                 ldb_oom(module->ldb);
 550                 return LDB_ERR_OPERATIONS_ERROR;
 551         }
 552         ret = samdb_msg_add_uint64(module->ldb, msg, msg, "uSNCreated", seq_num);
 553         if (ret != LDB_SUCCESS) {
 554                 talloc_free(down_req);
 555                 ldb_oom(module->ldb);
 556                 return LDB_ERR_OPERATIONS_ERROR;
 557         }
 558         ret = samdb_msg_add_uint64(module->ldb, msg, msg, "uSNChanged", seq_num);
 559         if (ret != LDB_SUCCESS) {
 560                 talloc_free(down_req);
 561                 ldb_oom(module->ldb);
 562                 return LDB_ERR_OPERATIONS_ERROR;
 563         }
 564         ret = ldb_msg_add_value(msg, "replPropertyMetaData", &nmd_value, NULL);
 565         if (ret != LDB_SUCCESS) {
 566                 talloc_free(down_req);
 567                 ldb_oom(module->ldb);
 568                 return LDB_ERR_OPERATIONS_ERROR;
 569         }
 570
 571         /*
 572          * sort the attributes by attid before storing the object
 573          */
 574         replmd_ldb_message_sort(msg, schema);
 575
 576         ldb_set_timeout_from_prev_req(module->ldb, req, down_req);
 577
 578         /* go on with the call chain */
 579         ret = ldb_next_request(module, down_req);
 580
 581         /* do not free down_req as the call results may be linked to it,
 582          * it will be freed when the upper level request get freed */
 583         if (ret == LDB_SUCCESS) {
 584                 req->handle = down_req->handle;
 585         }
 586
 587         return ret;
 588 }
 589
 590 static int replmd_add(struct ldb_module *module, struct ldb_request *req)
 591 {
 592         return replmd_prepare_originating(module, req, req->op.add.message->dn,
 593                                           "replmd_add", replmd_add_originating);
 594 }
 595
 596 static int replmd_modify_originating(struct ldb_module *module,
 597                                      struct ldb_request *req,
 598                                      const struct dsdb_schema *schema,
 599                                      const struct dsdb_control_current_partition *partition)
 600 {
 601         struct ldb_request *down_req;
 602         struct ldb_message *msg;
 603         int ret;
 604         time_t t = time(NULL);
 605         uint64_t seq_num;
 606
 607         ldb_debug(module->ldb, LDB_DEBUG_TRACE, "replmd_modify_originating\n");
 608
 609         down_req = talloc(req, struct ldb_request);
 610         if (down_req == NULL) {
 611                 return LDB_ERR_OPERATIONS_ERROR;
 612         }
 613
 614         *down_req = *req;
 615
 616         /* we have to copy the message as the caller might have it as a const */
 617         down_req->op.mod.message = msg = ldb_msg_copy_shallow(down_req, req->op.mod.message);
 618         if (msg == NULL) {
 619                 talloc_free(down_req);
 620                 return LDB_ERR_OPERATIONS_ERROR;
 621         }
 622
 623         if (add_time_element(msg, "whenChanged", t) != 0) {
 624                 talloc_free(down_req);
 625                 return LDB_ERR_OPERATIONS_ERROR;
 626         }
 627
 628         /* Get a sequence number from the backend */
 629         ret = ldb_sequence_number(module->ldb, LDB_SEQ_NEXT, &seq_num);
 630         if (ret == LDB_SUCCESS) {
 631                 if (add_uint64_element(msg, "uSNChanged", seq_num) != 0) {
 632                         talloc_free(down_req);
 633                         return LDB_ERR_OPERATIONS_ERROR;
 634                 }
 635         }
 636
 637         ldb_set_timeout_from_prev_req(module->ldb, req, down_req);
 638
 639         /* go on with the call chain */
 640         ret = ldb_next_request(module, down_req);
 641
 642         /* do not free down_req as the call results may be linked to it,
 643          * it will be freed when the upper level request get freed */
 644         if (ret == LDB_SUCCESS) {
 645                 req->handle = down_req->handle;
 646         }
 647
 648         return ret;
 649 }
 650
 651 static int replmd_modify(struct ldb_module *module, struct ldb_request *req)
 652 {
 653         return replmd_prepare_originating(module, req, req->op.mod.message->dn,
 654                                           "replmd_modify", replmd_modify_originating);
 655 }
 656
 657 static int replmd_replicated_request_reply_helper(struct replmd_replicated_request *ar, int ret)
 658 {
 659         struct ldb_reply *ares = NULL;
 660
 661         ar->handle->status = ret;
 662         ar->handle->state = LDB_ASYNC_DONE;
 663
 664         if (!ar->orig_req->callback) {
 665                 return LDB_SUCCESS;
 666         }
 667
 668         /* we're done and need to report the success to the caller */
 669         ares = talloc_zero(ar, struct ldb_reply);
 670         if (!ares) {
 671                 ar->handle->status = LDB_ERR_OPERATIONS_ERROR;
 672                 ar->handle->state = LDB_ASYNC_DONE;
 673                 return LDB_ERR_OPERATIONS_ERROR;
 674         }
 675
 676         ares->type      = LDB_REPLY_EXTENDED;
 677         ares->response  = NULL;
 678
 679         return ar->orig_req->callback(ar->module->ldb, ar->orig_req->context, ares);
 680 }
 681
 682 static int replmd_replicated_request_done(struct replmd_replicated_request *ar)
 683 {
 684         return replmd_replicated_request_reply_helper(ar, LDB_SUCCESS);
 685 }
 686
 687 static int replmd_replicated_request_error(struct replmd_replicated_request *ar, int ret)
 688 {
 689         return replmd_replicated_request_reply_helper(ar, ret);
 690 }
 691
 692 static int replmd_replicated_request_werror(struct replmd_replicated_request *ar, WERROR status)
 693 {
 694         int ret = LDB_ERR_OTHER;
 695         /* TODO: do some error mapping */
 696         return replmd_replicated_request_reply_helper(ar, ret);
 697 }
 698
 699 static int replmd_replicated_apply_next(struct replmd_replicated_request *ar);
 700
 701 static int replmd_replicated_apply_add_callback(struct ldb_context *ldb,
 702                                                 void *private_data,
 703                                                 struct ldb_reply *ares)
 704 {
 705 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
 706         struct replmd_replicated_request *ar = talloc_get_type(private_data,
 707                                                struct replmd_replicated_request);
 708
 709         ar->sub.change_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
 710         if (ar->sub.change_ret != LDB_SUCCESS) {
 711                 return replmd_replicated_request_error(ar, ar->sub.change_ret);
 712         }
 713
 714         talloc_free(ar->sub.mem_ctx);
 715         ZERO_STRUCT(ar->sub);
 716
 717         ar->index_current++;
 718
 719         return replmd_replicated_apply_next(ar);
 720 #else
 721         return LDB_SUCCESS;
 722 #endif
 723 }
 724
 725 static int replmd_replicated_apply_add(struct replmd_replicated_request *ar)
 726 {
 727         NTSTATUS nt_status;
 728         struct ldb_message *msg;
 729         struct replPropertyMetaDataBlob *md;
 730         struct ldb_val md_value;
 731         uint32_t i;
 732         uint64_t seq_num;
 733         int ret;
 734
 735         /*
 736          * TODO: check if the parent object exist
 737          */
 738
 739         /*
 740          * TODO: handle the conflict case where an object with the
 741          *       same name exist
 742          */
 743
 744         msg = ar->objs->objects[ar->index_current].msg;
 745         md = ar->objs->objects[ar->index_current].meta_data;
 746
 747         ret = ldb_sequence_number(ar->module->ldb, LDB_SEQ_NEXT, &seq_num);
 748         if (ret != LDB_SUCCESS) {
 749                 return replmd_replicated_request_error(ar, ret);
 750         }
 751
 752         ret = ldb_msg_add_value(msg, "objectGUID", &ar->objs->objects[ar->index_current].guid_value, NULL);
 753         if (ret != LDB_SUCCESS) {
 754                 return replmd_replicated_request_error(ar, ret);
 755         }
 756
 757         ret = ldb_msg_add_string(msg, "whenChanged", ar->objs->objects[ar->index_current].when_changed);
 758         if (ret != LDB_SUCCESS) {
 759                 return replmd_replicated_request_error(ar, ret);
 760         }
 761
 762         ret = samdb_msg_add_uint64(ar->module->ldb, msg, msg, "uSNCreated", seq_num);
 763         if (ret != LDB_SUCCESS) {
 764                 return replmd_replicated_request_error(ar, ret);
 765         }
 766
 767         ret = samdb_msg_add_uint64(ar->module->ldb, msg, msg, "uSNChanged", seq_num);
 768         if (ret != LDB_SUCCESS) {
 769                 return replmd_replicated_request_error(ar, ret);
 770         }
 771
 772         /*
 773          * the meta data array is already sorted by the caller
 774          */
 775         for (i=0; i < md->ctr.ctr1.count; i++) {
 776                 md->ctr.ctr1.array[i].local_usn = seq_num;
 777         }
 778         nt_status = ndr_push_struct_blob(&md_value, msg, md,
 779                                          (ndr_push_flags_fn_t)ndr_push_replPropertyMetaDataBlob);
 780         if (!NT_STATUS_IS_OK(nt_status)) {
 781                 return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
 782         }
 783         ret = ldb_msg_add_value(msg, "replPropertyMetaData", &md_value, NULL);
 784         if (ret != LDB_SUCCESS) {
 785                 return replmd_replicated_request_error(ar, ret);
 786         }
 787
 788         replmd_ldb_message_sort(msg, ar->schema);
 789
 790         ret = ldb_build_add_req(&ar->sub.change_req,
 791                                 ar->module->ldb,
 792                                 ar->sub.mem_ctx,
 793                                 msg,
 794                                 NULL,
 795                                 ar,
 796                                 replmd_replicated_apply_add_callback);
 797         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
 798
 799 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
 800         return ldb_next_request(ar->module, ar->sub.change_req);
 801 #else
 802         ret = ldb_next_request(ar->module, ar->sub.change_req);
 803         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
 804
 805         ar->sub.change_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
 806         if (ar->sub.change_ret != LDB_SUCCESS) {
 807                 return replmd_replicated_request_error(ar, ar->sub.change_ret);
 808         }
 809
 810         talloc_free(ar->sub.mem_ctx);
 811         ZERO_STRUCT(ar->sub);
 812
 813         ar->index_current++;
 814
 815         return LDB_SUCCESS;
 816 #endif
 817 }
 818
 819 static int replmd_replPropertyMetaData1_conflict_compare(struct replPropertyMetaData1 *m1,
 820                                                          struct replPropertyMetaData1 *m2)
 821 {
 822         int ret;
 823
 824         if (m1->version != m2->version) {
 825                 return m1->version - m2->version;
 826         }
 827
 828         if (m1->originating_change_time != m2->originating_change_time) {
 829                 return m1->originating_change_time - m2->originating_change_time;
 830         }
 831
 832         ret = GUID_compare(&m1->originating_invocation_id, &m2->originating_invocation_id);
 833         if (ret != 0) {
 834                 return ret;
 835         }
 836
 837         return m1->originating_usn - m2->originating_usn;
 838 }
 839
 840 static int replmd_replicated_apply_merge_callback(struct ldb_context *ldb,
 841                                                   void *private_data,
 842                                                   struct ldb_reply *ares)
 843 {
 844 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
 845         struct replmd_replicated_request *ar = talloc_get_type(private_data,
 846                                                struct replmd_replicated_request);
 847
 848         ret = ldb_next_request(ar->module, ar->sub.change_req);
 849         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
 850
 851         ar->sub.change_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
 852         if (ar->sub.change_ret != LDB_SUCCESS) {
 853                 return replmd_replicated_request_error(ar, ar->sub.change_ret);
 854         }
 855
 856         talloc_free(ar->sub.mem_ctx);
 857         ZERO_STRUCT(ar->sub);
 858
 859         ar->index_current++;
 860
 861         return LDB_SUCCESS;
 862 #else
 863         return LDB_SUCCESS;
 864 #endif
 865 }
 866
 867 static int replmd_replicated_apply_merge(struct replmd_replicated_request *ar)
 868 {
 869         NTSTATUS nt_status;
 870         struct ldb_message *msg;
 871         struct replPropertyMetaDataBlob *rmd;
 872         struct replPropertyMetaDataBlob omd;
 873         const struct ldb_val *omd_value;
 874         struct replPropertyMetaDataBlob nmd;
 875         struct ldb_val nmd_value;
 876         uint32_t i,j,ni=0;
 877         uint32_t removed_attrs = 0;
 878         uint64_t seq_num;
 879         int ret;
 880
 881         msg = ar->objs->objects[ar->index_current].msg;
 882         rmd = ar->objs->objects[ar->index_current].meta_data;
 883         ZERO_STRUCT(omd);
 884         omd.version = 1;
 885
 886         /*
 887          * TODO: add rename conflict handling
 888          */
 889         if (ldb_dn_compare(msg->dn, ar->sub.search_msg->dn) != 0) {
 890                 ldb_debug_set(ar->module->ldb, LDB_DEBUG_FATAL, "replmd_replicated_apply_merge[%u]: rename not supported",
 891                               ar->index_current);
 892                 ldb_debug(ar->module->ldb, LDB_DEBUG_FATAL, "%s => %s\n",
 893                           ldb_dn_get_linearized(ar->sub.search_msg->dn),
 894                           ldb_dn_get_linearized(msg->dn));
 895                 return replmd_replicated_request_werror(ar, WERR_NOT_SUPPORTED);
 896         }
 897
 898         ret = ldb_sequence_number(ar->module->ldb, LDB_SEQ_NEXT, &seq_num);
 899         if (ret != LDB_SUCCESS) {
 900                 return replmd_replicated_request_error(ar, ret);
 901         }
 902
 903         /* find existing meta data */
 904         omd_value = ldb_msg_find_ldb_val(ar->sub.search_msg, "replPropertyMetaData");
 905         if (omd_value) {
 906                 nt_status = ndr_pull_struct_blob(omd_value, ar->sub.mem_ctx, &omd,
 907                                                  (ndr_pull_flags_fn_t)ndr_pull_replPropertyMetaDataBlob);
 908                 if (!NT_STATUS_IS_OK(nt_status)) {
 909                         return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
 910                 }
 911
 912                 if (omd.version != 1) {
 913                         return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
 914                 }
 915         }
 916
 917         ZERO_STRUCT(nmd);
 918         nmd.version = 1;
 919         nmd.ctr.ctr1.count = omd.ctr.ctr1.count + rmd->ctr.ctr1.count;
 920         nmd.ctr.ctr1.array = talloc_array(ar->sub.mem_ctx,
 921                                           struct replPropertyMetaData1,
 922                                           nmd.ctr.ctr1.count);
 923         if (!nmd.ctr.ctr1.array) return replmd_replicated_request_werror(ar, WERR_NOMEM);
 924
 925         /* first copy the old meta data */
 926         for (i=0; i < omd.ctr.ctr1.count; i++) {
 927                 nmd.ctr.ctr1.array[ni]  = omd.ctr.ctr1.array[i];
 928                 ni++;
 929         }
 930
 931         /* now merge in the new meta data */
 932         for (i=0; i < rmd->ctr.ctr1.count; i++) {
 933                 bool found = false;
 934
 935                 rmd->ctr.ctr1.array[i].local_usn = seq_num;
 936
 937                 for (j=0; j < ni; j++) {
 938                         int cmp;
 939
 940                         if (rmd->ctr.ctr1.array[i].attid != nmd.ctr.ctr1.array[j].attid) {
 941                                 continue;
 942                         }
 943
 944                         cmp = replmd_replPropertyMetaData1_conflict_compare(&rmd->ctr.ctr1.array[i],
 945                                                                             &nmd.ctr.ctr1.array[j]);
 946                         if (cmp > 0) {
 947                                 /* replace the entry */
 948                                 nmd.ctr.ctr1.array[j] = rmd->ctr.ctr1.array[i];
 949                                 found = true;
 950                                 break;
 951                         }
 952
 953                         /* we don't want to apply this change so remove the attribute */
 954                         ldb_msg_remove_element(msg, &msg->elements[i-removed_attrs]);
 955                         removed_attrs++;
 956
 957                         found = true;
 958                         break;
 959                 }
 960
 961                 if (found) continue;
 962
 963                 nmd.ctr.ctr1.array[ni] = rmd->ctr.ctr1.array[i];
 964                 ni++;
 965         }
 966
 967         /*
 968          * finally correct the size of the meta_data array
 969          */
 970         nmd.ctr.ctr1.count = ni;
 971
 972         /*
 973          * the rdn attribute (the alias for the name attribute),
 974          * 'cn' for most objects is the last entry in the meta data array
 975          * we have stored
 976          *
 977          * sort the new meta data array
 978          */
 979         {
 980                 struct replPropertyMetaData1 *rdn_p;
 981                 uint32_t rdn_idx = omd.ctr.ctr1.count - 1;
 982
 983                 rdn_p = &nmd.ctr.ctr1.array[rdn_idx];
 984                 replmd_replPropertyMetaDataCtr1_sort(&nmd.ctr.ctr1, &rdn_p->attid);
 985         }
 986
 987         /* create the meta data value */
 988         nt_status = ndr_push_struct_blob(&nmd_value, msg, &nmd,
 989                                          (ndr_push_flags_fn_t)ndr_push_replPropertyMetaDataBlob);
 990         if (!NT_STATUS_IS_OK(nt_status)) {
 991                 return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
 992         }
 993
 994         /*
 995          * check if some replicated attributes left, otherwise skip the ldb_modify() call
 996          */
 997         if (msg->num_elements == 0) {
 998                 ldb_debug(ar->module->ldb, LDB_DEBUG_TRACE, "replmd_replicated_apply_merge[%u]: skip replace\n",
 999                           ar->index_current);
1000                 goto next_object;
1001         }
1002
1003         ldb_debug(ar->module->ldb, LDB_DEBUG_TRACE, "replmd_replicated_apply_merge[%u]: replace %u attributes\n",
1004                   ar->index_current, msg->num_elements);
1005
1006         /*
1007          * when we now that we'll modify the record, add the whenChanged, uSNChanged
1008          * and replPopertyMetaData attributes
1009          */
1010         ret = ldb_msg_add_string(msg, "whenChanged", ar->objs->objects[ar->index_current].when_changed);
1011         if (ret != LDB_SUCCESS) {
1012                 return replmd_replicated_request_error(ar, ret);
1013         }
1014         ret = samdb_msg_add_uint64(ar->module->ldb, msg, msg, "uSNChanged", seq_num);
1015         if (ret != LDB_SUCCESS) {
1016                 return replmd_replicated_request_error(ar, ret);
1017         }
1018         ret = ldb_msg_add_value(msg, "replPropertyMetaData", &nmd_value, NULL);
1019         if (ret != LDB_SUCCESS) {
1020                 return replmd_replicated_request_error(ar, ret);
1021         }
1022
1023         replmd_ldb_message_sort(msg, ar->schema);
1024
1025         /* we want to replace the old values */
1026         for (i=0; i < msg->num_elements; i++) {
1027                 msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
1028         }
1029
1030         ret = ldb_build_mod_req(&ar->sub.change_req,
1031                                 ar->module->ldb,
1032                                 ar->sub.mem_ctx,
1033                                 msg,
1034                                 NULL,
1035                                 ar,
1036                                 replmd_replicated_apply_merge_callback);
1037         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1038
1039 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
1040         return ldb_next_request(ar->module, ar->sub.change_req);
1041 #else
1042         ret = ldb_next_request(ar->module, ar->sub.change_req);
1043         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1044
1045         ar->sub.change_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
1046         if (ar->sub.change_ret != LDB_SUCCESS) {
1047                 return replmd_replicated_request_error(ar, ar->sub.change_ret);
1048         }
1049
1050 next_object:
1051         talloc_free(ar->sub.mem_ctx);
1052         ZERO_STRUCT(ar->sub);
1053
1054         ar->index_current++;
1055
1056         return LDB_SUCCESS;
1057 #endif
1058 }
1059
1060 static int replmd_replicated_apply_search_callback(struct ldb_context *ldb,
1061                                                    void *private_data,
1062                                                    struct ldb_reply *ares)
1063 {
1064         struct replmd_replicated_request *ar = talloc_get_type(private_data,
1065                                                struct replmd_replicated_request);
1066         bool is_done = false;
1067
1068         switch (ares->type) {
1069         case LDB_REPLY_ENTRY:
1070                 ar->sub.search_msg = talloc_steal(ar->sub.mem_ctx, ares->message);
1071                 break;
1072         case LDB_REPLY_REFERRAL:
1073                 /* we ignore referrals */
1074                 break;
1075         case LDB_REPLY_EXTENDED:
1076         case LDB_REPLY_DONE:
1077                 is_done = true;
1078         }
1079
1080         talloc_free(ares);
1081
1082 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
1083         if (is_done) {
1084                 ar->sub.search_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
1085                 if (ar->sub.search_ret != LDB_SUCCESS) {
1086                         return replmd_replicated_request_error(ar, ar->sub.search_ret);
1087                 }
1088                 if (ar->sub.search_msg) {
1089                         return replmd_replicated_apply_merge(ar);
1090                 }
1091                 return replmd_replicated_apply_add(ar);
1092         }
1093 #endif
1094         return LDB_SUCCESS;
1095 }
1096
1097 static int replmd_replicated_apply_search(struct replmd_replicated_request *ar)
1098 {
1099         int ret;
1100         char *tmp_str;
1101         char *filter;
1102
1103         tmp_str = ldb_binary_encode(ar->sub.mem_ctx, ar->objs->objects[ar->index_current].guid_value);
1104         if (!tmp_str) return replmd_replicated_request_werror(ar, WERR_NOMEM);
1105
1106         filter = talloc_asprintf(ar->sub.mem_ctx, "(objectGUID=%s)", tmp_str);
1107         if (!filter) return replmd_replicated_request_werror(ar, WERR_NOMEM);
1108         talloc_free(tmp_str);
1109
1110         ret = ldb_build_search_req(&ar->sub.search_req,
1111                                    ar->module->ldb,
1112                                    ar->sub.mem_ctx,
1113                                    ar->objs->partition_dn,
1114                                    LDB_SCOPE_SUBTREE,
1115                                    filter,
1116                                    NULL,
1117                                    NULL,
1118                                    ar,
1119                                    replmd_replicated_apply_search_callback);
1120         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1121
1122 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
1123         return ldb_next_request(ar->module, ar->sub.search_req);
1124 #else
1125         ret = ldb_next_request(ar->module, ar->sub.search_req);
1126         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1127
1128         ar->sub.search_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
1129         if (ar->sub.search_ret != LDB_SUCCESS) {
1130                 return replmd_replicated_request_error(ar, ar->sub.search_ret);
1131         }
1132         if (ar->sub.search_msg) {
1133                 return replmd_replicated_apply_merge(ar);
1134         }
1135
1136         return replmd_replicated_apply_add(ar);
1137 #endif
1138 }
1139
1140 static int replmd_replicated_apply_next(struct replmd_replicated_request *ar)
1141 {
1142 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
1143         if (ar->index_current >= ar->objs->num_objects) {
1144                 return replmd_replicated_uptodate_vector(ar);
1145         }
1146 #endif
1147
1148         ar->sub.mem_ctx = talloc_new(ar);
1149         if (!ar->sub.mem_ctx) return replmd_replicated_request_werror(ar, WERR_NOMEM);
1150
1151         return replmd_replicated_apply_search(ar);
1152 }
1153
1154 static int replmd_replicated_uptodate_modify_callback(struct ldb_context *ldb,
1155                                                       void *private_data,
1156                                                       struct ldb_reply *ares)
1157 {
1158 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
1159         struct replmd_replicated_request *ar = talloc_get_type(private_data,
1160                                                struct replmd_replicated_request);
1161
1162         ar->sub.change_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
1163         if (ar->sub.change_ret != LDB_SUCCESS) {
1164                 return replmd_replicated_request_error(ar, ar->sub.change_ret);
1165         }
1166
1167         talloc_free(ar->sub.mem_ctx);
1168         ZERO_STRUCT(ar->sub);
1169
1170         return replmd_replicated_request_done(ar);
1171 #else
1172         return LDB_SUCCESS;
1173 #endif
1174 }
1175
1176 static int replmd_drsuapi_DsReplicaCursor2_compare(const struct drsuapi_DsReplicaCursor2 *c1,
1177                                                    const struct drsuapi_DsReplicaCursor2 *c2)
1178 {
1179         return GUID_compare(&c1->source_dsa_invocation_id, &c2->source_dsa_invocation_id);
1180 }
1181
1182 static int replmd_replicated_uptodate_modify(struct replmd_replicated_request *ar)
1183 {
1184         NTSTATUS nt_status;
1185         struct ldb_message *msg;
1186         struct replUpToDateVectorBlob ouv;
1187         const struct ldb_val *ouv_value;
1188         const struct drsuapi_DsReplicaCursor2CtrEx *ruv;
1189         struct replUpToDateVectorBlob nuv;
1190         struct ldb_val nuv_value;
1191         struct ldb_message_element *nuv_el = NULL;
1192         const struct GUID *our_invocation_id;
1193         struct ldb_message_element *orf_el = NULL;
1194         struct repsFromToBlob nrf;
1195         struct ldb_val *nrf_value = NULL;
1196         struct ldb_message_element *nrf_el = NULL;
1197         uint32_t i,j,ni=0;
1198         uint64_t seq_num;
1199         bool found = false;
1200         time_t t = time(NULL);
1201         NTTIME now;
1202         int ret;
1203
1204         ruv = ar->objs->uptodateness_vector;
1205         ZERO_STRUCT(ouv);
1206         ouv.version = 2;
1207         ZERO_STRUCT(nuv);
1208         nuv.version = 2;
1209
1210         unix_to_nt_time(&now, t);
1211
1212         /*
1213          * we use the next sequence number for our own highest_usn
1214          * because we will do a modify request and this will increment
1215          * our highest_usn
1216          */
1217         ret = ldb_sequence_number(ar->module->ldb, LDB_SEQ_NEXT, &seq_num);
1218         if (ret != LDB_SUCCESS) {
1219                 return replmd_replicated_request_error(ar, ret);
1220         }
1221
1222         /*
1223          * first create the new replUpToDateVector
1224          */
1225         ouv_value = ldb_msg_find_ldb_val(ar->sub.search_msg, "replUpToDateVector");
1226         if (ouv_value) {
1227                 nt_status = ndr_pull_struct_blob(ouv_value, ar->sub.mem_ctx, &ouv,
1228                                                  (ndr_pull_flags_fn_t)ndr_pull_replUpToDateVectorBlob);
1229                 if (!NT_STATUS_IS_OK(nt_status)) {
1230                         return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
1231                 }
1232
1233                 if (ouv.version != 2) {
1234                         return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
1235                 }
1236         }
1237
1238         /*
1239          * the new uptodateness vector will at least
1240          * contain 1 entry, one for the source_dsa
1241          *
1242          * plus optional values from our old vector and the one from the source_dsa
1243          */
1244         nuv.ctr.ctr2.count = 1 + ouv.ctr.ctr2.count;
1245         if (ruv) nuv.ctr.ctr2.count += ruv->count;
1246         nuv.ctr.ctr2.cursors = talloc_array(ar->sub.mem_ctx,
1247                                             struct drsuapi_DsReplicaCursor2,
1248                                             nuv.ctr.ctr2.count);
1249         if (!nuv.ctr.ctr2.cursors) return replmd_replicated_request_werror(ar, WERR_NOMEM);
1250
1251         /* first copy the old vector */
1252         for (i=0; i < ouv.ctr.ctr2.count; i++) {
1253                 nuv.ctr.ctr2.cursors[ni] = ouv.ctr.ctr2.cursors[i];
1254                 ni++;
1255         }
1256
1257         /* get our invocation_id if we have one already attached to the ldb */
1258         our_invocation_id = samdb_ntds_invocation_id(ar->module->ldb);
1259
1260         /* merge in the source_dsa vector is available */
1261         for (i=0; (ruv && i < ruv->count); i++) {
1262                 found = false;
1263
1264                 if (our_invocation_id &&
1265                     GUID_equal(&ruv->cursors[i].source_dsa_invocation_id,
1266                                our_invocation_id)) {
1267                         continue;
1268                 }
1269
1270                 for (j=0; j < ni; j++) {
1271                         if (!GUID_equal(&ruv->cursors[i].source_dsa_invocation_id,
1272                                         &nuv.ctr.ctr2.cursors[j].source_dsa_invocation_id)) {
1273                                 continue;
1274                         }
1275
1276                         found = true;
1277
1278                         /*
1279                          * we update only the highest_usn and not the latest_sync_success time,
1280                          * because the last success stands for direct replication
1281                          */
1282                         if (ruv->cursors[i].highest_usn > nuv.ctr.ctr2.cursors[j].highest_usn) {
1283                                 nuv.ctr.ctr2.cursors[j].highest_usn = ruv->cursors[i].highest_usn;
1284                         }
1285                         break;
1286                 }
1287
1288                 if (found) continue;
1289
1290                 /* if it's not there yet, add it */
1291                 nuv.ctr.ctr2.cursors[ni] = ruv->cursors[i];
1292                 ni++;
1293         }
1294
1295         /*
1296          * merge in the current highwatermark for the source_dsa
1297          */
1298         found = false;
1299         for (j=0; j < ni; j++) {
1300                 if (!GUID_equal(&ar->objs->source_dsa->source_dsa_invocation_id,
1301                                 &nuv.ctr.ctr2.cursors[j].source_dsa_invocation_id)) {
1302                         continue;
1303                 }
1304
1305                 found = true;
1306
1307                 /*
1308                  * here we update the highest_usn and last_sync_success time
1309                  * because we're directly replicating from the source_dsa
1310                  *
1311                  * and use the tmp_highest_usn because this is what we have just applied
1312                  * to our ldb
1313                  */
1314                 nuv.ctr.ctr2.cursors[j].highest_usn             = ar->objs->source_dsa->highwatermark.tmp_highest_usn;
1315                 nuv.ctr.ctr2.cursors[j].last_sync_success       = now;
1316                 break;
1317         }
1318         if (!found) {
1319                 /*
1320                  * here we update the highest_usn and last_sync_success time
1321                  * because we're directly replicating from the source_dsa
1322                  *
1323                  * and use the tmp_highest_usn because this is what we have just applied
1324                  * to our ldb
1325                  */
1326                 nuv.ctr.ctr2.cursors[ni].source_dsa_invocation_id= ar->objs->source_dsa->source_dsa_invocation_id;
1327                 nuv.ctr.ctr2.cursors[ni].highest_usn            = ar->objs->source_dsa->highwatermark.tmp_highest_usn;
1328                 nuv.ctr.ctr2.cursors[ni].last_sync_success      = now;
1329                 ni++;
1330         }
1331
1332         /*
1333          * finally correct the size of the cursors array
1334          */
1335         nuv.ctr.ctr2.count = ni;
1336
1337         /*
1338          * sort the cursors
1339          */
1340         qsort(nuv.ctr.ctr2.cursors, nuv.ctr.ctr2.count,
1341               sizeof(struct drsuapi_DsReplicaCursor2),
1342               (comparison_fn_t)replmd_drsuapi_DsReplicaCursor2_compare);
1343
1344         /*
1345          * create the change ldb_message
1346          */
1347         msg = ldb_msg_new(ar->sub.mem_ctx);
1348         if (!msg) return replmd_replicated_request_werror(ar, WERR_NOMEM);
1349         msg->dn = ar->sub.search_msg->dn;
1350
1351         nt_status = ndr_push_struct_blob(&nuv_value, msg, &nuv,
1352                                          (ndr_push_flags_fn_t)ndr_push_replUpToDateVectorBlob);
1353         if (!NT_STATUS_IS_OK(nt_status)) {
1354                 return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
1355         }
1356         ret = ldb_msg_add_value(msg, "replUpToDateVector", &nuv_value, &nuv_el);
1357         if (ret != LDB_SUCCESS) {
1358                 return replmd_replicated_request_error(ar, ret);
1359         }
1360         nuv_el->flags = LDB_FLAG_MOD_REPLACE;
1361
1362         /*
1363          * now create the new repsFrom value from the given repsFromTo1 structure
1364          */
1365         ZERO_STRUCT(nrf);
1366         nrf.version                                     = 1;
1367         nrf.ctr.ctr1                                    = *ar->objs->source_dsa;
1368         /* and fix some values... */
1369         nrf.ctr.ctr1.consecutive_sync_failures          = 0;
1370         nrf.ctr.ctr1.last_success                       = now;
1371         nrf.ctr.ctr1.last_attempt                       = now;
1372         nrf.ctr.ctr1.result_last_attempt                = WERR_OK;
1373         nrf.ctr.ctr1.highwatermark.highest_usn          = nrf.ctr.ctr1.highwatermark.tmp_highest_usn;
1374
1375         /*
1376          * first see if we already have a repsFrom value for the current source dsa
1377          * if so we'll later replace this value
1378          */
1379         orf_el = ldb_msg_find_element(ar->sub.search_msg, "repsFrom");
1380         if (orf_el) {
1381                 for (i=0; i < orf_el->num_values; i++) {
1382                         struct repsFromToBlob *trf;
1383
1384                         trf = talloc(ar->sub.mem_ctx, struct repsFromToBlob);
1385                         if (!trf) return replmd_replicated_request_werror(ar, WERR_NOMEM);
1386
1387                         nt_status = ndr_pull_struct_blob(&orf_el->values[i], trf, trf,
1388                                                          (ndr_pull_flags_fn_t)ndr_pull_repsFromToBlob);
1389                         if (!NT_STATUS_IS_OK(nt_status)) {
1390                                 return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
1391                         }
1392
1393                         if (trf->version != 1) {
1394                                 return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
1395                         }
1396
1397                         /*
1398                          * we compare the source dsa objectGUID not the invocation_id
1399                          * because we want only one repsFrom value per source dsa
1400                          * and when the invocation_id of the source dsa has changed we don't need
1401                          * the old repsFrom with the old invocation_id
1402                          */
1403                         if (!GUID_equal(&trf->ctr.ctr1.source_dsa_obj_guid,
1404                                         &ar->objs->source_dsa->source_dsa_obj_guid)) {
1405                                 talloc_free(trf);
1406                                 continue;
1407                         }
1408
1409                         talloc_free(trf);
1410                         nrf_value = &orf_el->values[i];
1411                         break;
1412                 }
1413
1414                 /*
1415                  * copy over all old values to the new ldb_message
1416                  */
1417                 ret = ldb_msg_add_empty(msg, "repsFrom", 0, &nrf_el);
1418                 if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1419                 *nrf_el = *orf_el;
1420         }
1421
1422         /*
1423          * if we haven't found an old repsFrom value for the current source dsa
1424          * we'll add a new value
1425          */
1426         if (!nrf_value) {
1427                 struct ldb_val zero_value;
1428                 ZERO_STRUCT(zero_value);
1429                 ret = ldb_msg_add_value(msg, "repsFrom", &zero_value, &nrf_el);
1430                 if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1431
1432                 nrf_value = &nrf_el->values[nrf_el->num_values - 1];
1433         }
1434
1435         /* we now fill the value which is already attached to ldb_message */
1436         nt_status = ndr_push_struct_blob(nrf_value, msg, &nrf,
1437                                          (ndr_push_flags_fn_t)ndr_push_repsFromToBlob);
1438         if (!NT_STATUS_IS_OK(nt_status)) {
1439                 return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
1440         }
1441
1442         /*
1443          * the ldb_message_element for the attribute, has all the old values and the new one
1444          * so we'll replace the whole attribute with all values
1445          */
1446         nrf_el->flags = LDB_FLAG_MOD_REPLACE;
1447
1448         /* prepare the ldb_modify() request */
1449         ret = ldb_build_mod_req(&ar->sub.change_req,
1450                                 ar->module->ldb,
1451                                 ar->sub.mem_ctx,
1452                                 msg,
1453                                 NULL,
1454                                 ar,
1455                                 replmd_replicated_uptodate_modify_callback);
1456         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1457
1458 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
1459         return ldb_next_request(ar->module, ar->sub.change_req);
1460 #else
1461         ret = ldb_next_request(ar->module, ar->sub.change_req);
1462         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1463
1464         ar->sub.change_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
1465         if (ar->sub.change_ret != LDB_SUCCESS) {
1466                 return replmd_replicated_request_error(ar, ar->sub.change_ret);
1467         }
1468
1469         talloc_free(ar->sub.mem_ctx);
1470         ZERO_STRUCT(ar->sub);
1471
1472         return replmd_replicated_request_done(ar);
1473 #endif
1474 }
1475
1476 static int replmd_replicated_uptodate_search_callback(struct ldb_context *ldb,
1477                                                       void *private_data,
1478                                                       struct ldb_reply *ares)
1479 {
1480         struct replmd_replicated_request *ar = talloc_get_type(private_data,
1481                                                struct replmd_replicated_request);
1482         bool is_done = false;
1483
1484         switch (ares->type) {
1485         case LDB_REPLY_ENTRY:
1486                 ar->sub.search_msg = talloc_steal(ar->sub.mem_ctx, ares->message);
1487                 break;
1488         case LDB_REPLY_REFERRAL:
1489                 /* we ignore referrals */
1490                 break;
1491         case LDB_REPLY_EXTENDED:
1492         case LDB_REPLY_DONE:
1493                 is_done = true;
1494         }
1495
1496         talloc_free(ares);
1497
1498 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
1499         if (is_done) {
1500                 ar->sub.search_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
1501                 if (ar->sub.search_ret != LDB_SUCCESS) {
1502                         return replmd_replicated_request_error(ar, ar->sub.search_ret);
1503                 }
1504                 if (!ar->sub.search_msg) {
1505                         return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
1506                 }
1507
1508                 return replmd_replicated_uptodate_modify(ar);
1509         }
1510 #endif
1511         return LDB_SUCCESS;
1512 }
1513
1514 static int replmd_replicated_uptodate_search(struct replmd_replicated_request *ar)
1515 {
1516         int ret;
1517         static const char *attrs[] = {
1518                 "replUpToDateVector",
1519                 "repsFrom",
1520                 NULL
1521         };
1522
1523         ret = ldb_build_search_req(&ar->sub.search_req,
1524                                    ar->module->ldb,
1525                                    ar->sub.mem_ctx,
1526                                    ar->objs->partition_dn,
1527                                    LDB_SCOPE_BASE,
1528                                    "(objectClass=*)",
1529                                    attrs,
1530                                    NULL,
1531                                    ar,
1532                                    replmd_replicated_uptodate_search_callback);
1533         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1534
1535 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
1536         return ldb_next_request(ar->module, ar->sub.search_req);
1537 #else
1538         ret = ldb_next_request(ar->module, ar->sub.search_req);
1539         if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
1540
1541         ar->sub.search_ret = ldb_wait(ar->sub.search_req->handle, LDB_WAIT_ALL);
1542         if (ar->sub.search_ret != LDB_SUCCESS) {
1543                 return replmd_replicated_request_error(ar, ar->sub.search_ret);
1544         }
1545         if (!ar->sub.search_msg) {
1546                 return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
1547         }
1548
1549         return replmd_replicated_uptodate_modify(ar);
1550 #endif
1551 }
1552
1553 static int replmd_replicated_uptodate_vector(struct replmd_replicated_request *ar)
1554 {
1555         ar->sub.mem_ctx = talloc_new(ar);
1556         if (!ar->sub.mem_ctx) return replmd_replicated_request_werror(ar, WERR_NOMEM);
1557
1558         return replmd_replicated_uptodate_search(ar);
1559 }
1560
1561 static int replmd_extended_replicated_objects(struct ldb_module *module, struct ldb_request *req)
1562 {
1563         struct dsdb_extended_replicated_objects *objs;
1564         struct replmd_replicated_request *ar;
1565
1566         ldb_debug(module->ldb, LDB_DEBUG_TRACE, "replmd_extended_replicated_objects\n");
1567
1568         objs = talloc_get_type(req->op.extended.data, struct dsdb_extended_replicated_objects);
1569         if (!objs) {
1570                 ldb_debug(module->ldb, LDB_DEBUG_FATAL, "replmd_extended_replicated_objects: invalid extended data\n");
1571                 return LDB_ERR_PROTOCOL_ERROR;
1572         }
1573
1574         if (objs->version != DSDB_EXTENDED_REPLICATED_OBJECTS_VERSION) {
1575                 ldb_debug(module->ldb, LDB_DEBUG_FATAL, "replmd_extended_replicated_objects: extended data invalid version [%u != %u]\n",
1576                           objs->version, DSDB_EXTENDED_REPLICATED_OBJECTS_VERSION);
1577                 return LDB_ERR_PROTOCOL_ERROR;
1578         }
1579
1580         ar = replmd_replicated_init_handle(module, req, objs);
1581         if (!ar) {
1582                 return LDB_ERR_OPERATIONS_ERROR;
1583         }
1584
1585 #ifdef REPLMD_FULL_ASYNC /* TODO: activate this code when ldb support full async code */
1586         return replmd_replicated_apply_next(ar);
1587 #else
1588         while (ar->index_current < ar->objs->num_objects &&
1589                req->handle->state != LDB_ASYNC_DONE) {
1590                 replmd_replicated_apply_next(ar);
1591         }
1592
1593         if (req->handle->state != LDB_ASYNC_DONE) {
1594                 replmd_replicated_uptodate_vector(ar);
1595         }
1596
1597         return LDB_SUCCESS;
1598 #endif
1599 }
1600
1601 static int replmd_extended(struct ldb_module *module, struct ldb_request *req)
1602 {
1603         if (strcmp(req->op.extended.oid, DSDB_EXTENDED_REPLICATED_OBJECTS_OID) == 0) {
1604                 return replmd_extended_replicated_objects(module, req);
1605         }
1606
1607         return ldb_next_request(module, req);
1608 }
1609
1610 static int replmd_wait_none(struct ldb_handle *handle) {
1611         struct replmd_replicated_request *ar;
1612
1613         if (!handle || !handle->private_data) {
1614                 return LDB_ERR_OPERATIONS_ERROR;
1615         }
1616
1617         ar = talloc_get_type(handle->private_data, struct replmd_replicated_request);
1618         if (!ar) {
1619                 return LDB_ERR_OPERATIONS_ERROR;
1620         }
1621
1622         /* we do only sync calls */
1623         if (handle->state != LDB_ASYNC_DONE) {
1624                 return LDB_ERR_OPERATIONS_ERROR;
1625         }
1626
1627         return handle->status;
1628 }
1629
1630 static int replmd_wait_all(struct ldb_handle *handle) {
1631
1632         int ret;
1633
1634         while (handle->state != LDB_ASYNC_DONE) {
1635                 ret = replmd_wait_none(handle);
1636                 if (ret != LDB_SUCCESS) {
1637                         return ret;
1638                 }
1639         }
1640
1641         return handle->status;
1642 }
1643
1644 static int replmd_wait(struct ldb_handle *handle, enum ldb_wait_type type)
1645 {
1646         if (type == LDB_WAIT_ALL) {
1647                 return replmd_wait_all(handle);
1648         } else {
1649                 return replmd_wait_none(handle);
1650         }
1651 }
1652
1653 static const struct ldb_module_ops replmd_ops = {
1654         .name          = "repl_meta_data",
1655         .add           = replmd_add,
1656         .modify        = replmd_modify,
1657         .extended      = replmd_extended,
1658         .wait          = replmd_wait
1659 };
1660
1661 int repl_meta_data_module_init(void)
1662 {
1663         return ldb_register_module(&replmd_ops);
1664 }