source4/dsdb/samdb/ldb_modules/partition.c

   1 /*
   2    Partitions ldb module
   3
   4    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2006
   5    Copyright (C) Stefan Metzmacher <metze@samba.org> 2007
   6
   7    * NOTICE: this module is NOT released under the GNU LGPL license as
   8    * other ldb code. This module is release under the GNU GPL v3 or
   9    * later license.
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 /*
  26  *  Name: ldb
  27  *
  28  *  Component: ldb partitions module
  29  *
  30  *  Description: Implement LDAP partitions
  31  *
  32  *  Author: Andrew Bartlett
  33  *  Author: Stefan Metzmacher
  34  */
  35
  36 #include "includes.h"
  37 #include "ldb/include/ldb_includes.h"
  38 #include "dsdb/samdb/samdb.h"
  39
  40 struct partition_private_data {
  41         struct dsdb_control_current_partition **partitions;
  42         struct ldb_dn **replicate;
  43 };
  44
  45 struct part_request {
  46         struct ldb_module *module;
  47         struct ldb_request *req;
  48 };
  49
  50 struct partition_context {
  51         struct ldb_module *module;
  52         struct ldb_request *req;
  53
  54         struct part_request *part_req;
  55         int num_requests;
  56         int finished_requests;
  57 };
  58
  59 static struct partition_context *partition_init_ctx(struct ldb_module *module, struct ldb_request *req)
  60 {
  61         struct partition_context *ac;
  62
  63         ac = talloc_zero(req, struct partition_context);
  64         if (ac == NULL) {
  65                 ldb_set_errstring(module->ldb, "Out of Memory");
  66                 return NULL;
  67         }
  68
  69         ac->module = module;
  70         ac->req = req;
  71
  72         return ac;
  73 }
  74
  75 #define PARTITION_FIND_OP(module, op) do { \
  76         struct ldb_context *ldbctx = module->ldb; \
  77         while (module && module->ops->op == NULL) module = module->next; \
  78         if (module == NULL) { \
  79                 ldb_asprintf_errstring(ldbctx, \
  80                         "Unable to find backend operation for " #op ); \
  81                 return LDB_ERR_OPERATIONS_ERROR; \
  82         } \
  83 } while (0)
  84
  85 /*
  86  *    helper functions to call the next module in chain
  87  *    */
  88
  89 int partition_request(struct ldb_module *module, struct ldb_request *request)
  90 {
  91         int ret;
  92         switch (request->operation) {
  93         case LDB_SEARCH:
  94                 PARTITION_FIND_OP(module, search);
  95                 ret = module->ops->search(module, request);
  96                 break;
  97         case LDB_ADD:
  98                 PARTITION_FIND_OP(module, add);
  99                 ret = module->ops->add(module, request);
 100                 break;
 101         case LDB_MODIFY:
 102                 PARTITION_FIND_OP(module, modify);
 103                 ret = module->ops->modify(module, request);
 104                 break;
 105         case LDB_DELETE:
 106                 PARTITION_FIND_OP(module, del);
 107                 ret = module->ops->del(module, request);
 108                 break;
 109         case LDB_RENAME:
 110                 PARTITION_FIND_OP(module, rename);
 111                 ret = module->ops->rename(module, request);
 112                 break;
 113         case LDB_EXTENDED:
 114                 PARTITION_FIND_OP(module, extended);
 115                 ret = module->ops->extended(module, request);
 116                 break;
 117         case LDB_SEQUENCE_NUMBER:
 118                 PARTITION_FIND_OP(module, sequence_number);
 119                 ret = module->ops->sequence_number(module, request);
 120                 break;
 121         default:
 122                 PARTITION_FIND_OP(module, request);
 123                 ret = module->ops->request(module, request);
 124                 break;
 125         }
 126         if (ret == LDB_SUCCESS) {
 127                 return ret;
 128         }
 129         if (!ldb_errstring(module->ldb)) {
 130                 /* Set a default error string, to place the blame somewhere */
 131                 ldb_asprintf_errstring(module->ldb,
 132                                         "error in module %s: %s (%d)",
 133                                         module->ops->name,
 134                                         ldb_strerror(ret), ret);
 135         }
 136         return ret;
 137 }
 138
 139 static struct dsdb_control_current_partition *find_partition(struct partition_private_data *data,
 140                                                              struct ldb_dn *dn)
 141 {
 142         int i;
 143
 144         /* Look at base DN */
 145         /* Figure out which partition it is under */
 146         /* Skip the lot if 'data' isn't here yet (initialistion) */
 147         for (i=0; data && data->partitions && data->partitions[i]; i++) {
 148                 if (ldb_dn_compare_base(data->partitions[i]->dn, dn) == 0) {
 149                         return data->partitions[i];
 150                 }
 151         }
 152
 153         return NULL;
 154 };
 155
 156 /**
 157  * fire the caller's callback for every entry, but only send 'done' once.
 158  */
 159 static int partition_req_callback(struct ldb_request *req,
 160                                   struct ldb_reply *ares)
 161 {
 162         struct partition_context *ac;
 163         struct ldb_module *module;
 164         struct ldb_request *nreq;
 165         int ret;
 166
 167         ac = talloc_get_type(req->context, struct partition_context);
 168
 169         if (!ares) {
 170                 return ldb_module_done(ac->req, NULL, NULL,
 171                                         LDB_ERR_OPERATIONS_ERROR);
 172         }
 173         if (ares->error != LDB_SUCCESS) {
 174                 return ldb_module_done(ac->req, ares->controls,
 175                                         ares->response, ares->error);
 176         }
 177
 178         switch (ares->type) {
 179         case LDB_REPLY_REFERRAL:
 180                 /* ignore referrals for now */
 181                 break;
 182
 183         case LDB_REPLY_ENTRY:
 184                 if (ac->req->operation != LDB_SEARCH) {
 185                         ldb_set_errstring(ac->module->ldb,
 186                                 "partition_req_callback:"
 187                                 " Unsupported reply type for this request");
 188                         return ldb_module_done(ac->req, NULL, NULL,
 189                                                 LDB_ERR_OPERATIONS_ERROR);
 190                 }
 191                 return ldb_module_send_entry(ac->req, ares->message);
 192
 193         case LDB_REPLY_DONE:
 194                 if (ac->req->operation == LDB_EXTENDED) {
 195                         /* FIXME: check for ares->response, replmd does not fill it ! */
 196                         if (ares->response) {
 197                                 if (strcmp(ares->response->oid, LDB_EXTENDED_START_TLS_OID) != 0) {
 198                                         ldb_set_errstring(ac->module->ldb,
 199                                                           "partition_req_callback:"
 200                                                           " Unknown extended reply, "
 201                                                           "only supports START_TLS");
 202                                         talloc_free(ares);
 203                                         return ldb_module_done(ac->req, NULL, NULL,
 204                                                                 LDB_ERR_OPERATIONS_ERROR);
 205                                 }
 206                         }
 207                 }
 208
 209                 ac->finished_requests++;
 210                 if (ac->finished_requests == ac->num_requests) {
 211                         /* this was the last one, call callback */
 212                         return ldb_module_done(ac->req, ares->controls,
 213                                                 ares->response, ares->error);
 214                 }
 215
 216                 /* not the last, now call the next one */
 217                 module = ac->part_req[ac->finished_requests].module;
 218                 nreq = ac->part_req[ac->finished_requests].req;
 219
 220                 ret = partition_request(module, nreq);
 221                 if (ret != LDB_SUCCESS) {
 222                         talloc_free(ares);
 223                         return ldb_module_done(ac->req, NULL, NULL, ret);
 224                 }
 225
 226                 break;
 227         }
 228
 229         talloc_free(ares);
 230         return LDB_SUCCESS;
 231 }
 232
 233 static int partition_prep_request(struct partition_context *ac,
 234                                   struct dsdb_control_current_partition *partition)
 235 {
 236         int ret;
 237         struct ldb_request *req;
 238
 239         ac->part_req = talloc_realloc(ac, ac->part_req,
 240                                         struct part_request,
 241                                         ac->num_requests + 1);
 242         if (ac->part_req == NULL) {
 243                 ldb_oom(ac->module->ldb);
 244                 return LDB_ERR_OPERATIONS_ERROR;
 245         }
 246
 247         switch (ac->req->operation) {
 248         case LDB_SEARCH:
 249                 ret = ldb_build_search_req_ex(&req, ac->module->ldb,
 250                                         ac->part_req,
 251                                         ac->req->op.search.base,
 252                                         ac->req->op.search.scope,
 253                                         ac->req->op.search.tree,
 254                                         ac->req->op.search.attrs,
 255                                         ac->req->controls,
 256                                         ac, partition_req_callback,
 257                                         ac->req);
 258                 break;
 259         case LDB_ADD:
 260                 ret = ldb_build_add_req(&req, ac->module->ldb, ac->part_req,
 261                                         ac->req->op.add.message,
 262                                         ac->req->controls,
 263                                         ac, partition_req_callback,
 264                                         ac->req);
 265                 break;
 266         case LDB_MODIFY:
 267                 ret = ldb_build_mod_req(&req, ac->module->ldb, ac->part_req,
 268                                         ac->req->op.mod.message,
 269                                         ac->req->controls,
 270                                         ac, partition_req_callback,
 271                                         ac->req);
 272                 break;
 273         case LDB_DELETE:
 274                 ret = ldb_build_del_req(&req, ac->module->ldb, ac->part_req,
 275                                         ac->req->op.del.dn,
 276                                         ac->req->controls,
 277                                         ac, partition_req_callback,
 278                                         ac->req);
 279                 break;
 280         case LDB_RENAME:
 281                 ret = ldb_build_rename_req(&req, ac->module->ldb, ac->part_req,
 282                                         ac->req->op.rename.olddn,
 283                                         ac->req->op.rename.newdn,
 284                                         ac->req->controls,
 285                                         ac, partition_req_callback,
 286                                         ac->req);
 287                 break;
 288         case LDB_EXTENDED:
 289                 ret = ldb_build_extended_req(&req, ac->module->ldb,
 290                                         ac->part_req,
 291                                         ac->req->op.extended.oid,
 292                                         ac->req->op.extended.data,
 293                                         ac->req->controls,
 294                                         ac, partition_req_callback,
 295                                         ac->req);
 296                 break;
 297         default:
 298                 ldb_set_errstring(ac->module->ldb,
 299                                   "Unsupported request type!");
 300                 ret = LDB_ERR_UNWILLING_TO_PERFORM;
 301         }
 302
 303         if (ret != LDB_SUCCESS) {
 304                 return ret;
 305         }
 306
 307         ac->part_req[ac->num_requests].req = req;
 308
 309         if (ac->req->controls) {
 310                 req->controls = talloc_memdup(req, ac->req->controls,
 311                                         talloc_get_size(ac->req->controls));
 312                 if (req->controls == NULL) {
 313                         ldb_oom(ac->module->ldb);
 314                         return LDB_ERR_OPERATIONS_ERROR;
 315                 }
 316         }
 317
 318         if (partition) {
 319                 ac->part_req[ac->num_requests].module = partition->module;
 320
 321                 ret = ldb_request_add_control(req,
 322                                         DSDB_CONTROL_CURRENT_PARTITION_OID,
 323                                         false, partition);
 324                 if (ret != LDB_SUCCESS) {
 325                         return ret;
 326                 }
 327
 328                 if (req->operation == LDB_SEARCH) {
 329                         /* If the search is for 'more' than this partition,
 330                          * then change the basedn, so a remote LDAP server
 331                          * doesn't object */
 332                         if (ldb_dn_compare_base(partition->dn,
 333                                                 req->op.search.base) != 0) {
 334                                 req->op.search.base = partition->dn;
 335                         }
 336                 }
 337
 338         } else {
 339                 /* make sure you put the NEXT module here, or
 340                  * partition_request() will simply loop forever on itself */
 341                 ac->part_req[ac->num_requests].module = ac->module->next;
 342         }
 343
 344         ac->num_requests++;
 345
 346         return LDB_SUCCESS;
 347 }
 348
 349 static int partition_call_first(struct partition_context *ac)
 350 {
 351         return partition_request(ac->part_req[0].module, ac->part_req[0].req);
 352 }
 353
 354 /**
 355  * Send a request down to all the partitions
 356  */
 357 static int partition_send_all(struct ldb_module *module,
 358                               struct partition_context *ac,
 359                               struct ldb_request *req)
 360 {
 361         int i;
 362         struct partition_private_data *data = talloc_get_type(module->private_data,
 363                                                               struct partition_private_data);
 364         int ret = partition_prep_request(ac, NULL);
 365         if (ret != LDB_SUCCESS) {
 366                 return ret;
 367         }
 368         for (i=0; data && data->partitions && data->partitions[i]; i++) {
 369                 ret = partition_prep_request(ac, data->partitions[i]);
 370                 if (ret != LDB_SUCCESS) {
 371                         return ret;
 372                 }
 373         }
 374
 375         /* fire the first one */
 376         return partition_call_first(ac);
 377 }
 378
 379 /**
 380  * Figure out which backend a request needs to be aimed at.  Some
 381  * requests must be replicated to all backends
 382  */
 383 static int partition_replicate(struct ldb_module *module, struct ldb_request *req, struct ldb_dn *dn)
 384 {
 385         struct partition_context *ac;
 386         unsigned i;
 387         int ret;
 388         struct dsdb_control_current_partition *partition;
 389         struct partition_private_data *data = talloc_get_type(module->private_data,
 390                                                               struct partition_private_data);
 391         if (!data || !data->partitions) {
 392                 return ldb_next_request(module, req);
 393         }
 394
 395         if (req->operation != LDB_SEARCH) {
 396                 /* Is this a special DN, we need to replicate to every backend? */
 397                 for (i=0; data->replicate && data->replicate[i]; i++) {
 398                         if (ldb_dn_compare(data->replicate[i],
 399                                            dn) == 0) {
 400
 401                                 ac = partition_init_ctx(module, req);
 402                                 if (!ac) {
 403                                         return LDB_ERR_OPERATIONS_ERROR;
 404                                 }
 405
 406                                 return partition_send_all(module, ac, req);
 407                         }
 408                 }
 409         }
 410
 411         /* Otherwise, we need to find the partition to fire it to */
 412
 413         /* Find partition */
 414         partition = find_partition(data, dn);
 415         if (!partition) {
 416                 /*
 417                  * if we haven't found a matching partition
 418                  * pass the request to the main ldb
 419                  *
 420                  * TODO: we should maybe return an error here
 421                  *       if it's not a special dn
 422                  */
 423
 424                 return ldb_next_request(module, req);
 425         }
 426
 427         ac = partition_init_ctx(module, req);
 428         if (!ac) {
 429                 return LDB_ERR_OPERATIONS_ERROR;
 430         }
 431
 432         /* we need to add a control but we never touch the original request */
 433         ret = partition_prep_request(ac, partition);
 434         if (ret != LDB_SUCCESS) {
 435                 return ret;
 436         }
 437
 438         /* fire the first one */
 439         return partition_call_first(ac);
 440 }
 441
 442 /* search */
 443 static int partition_search(struct ldb_module *module, struct ldb_request *req)
 444 {
 445         struct ldb_control **saved_controls;
 446
 447         /* Find backend */
 448         struct partition_private_data *data = talloc_get_type(module->private_data,
 449                                                               struct partition_private_data);
 450         /* issue request */
 451
 452         /* (later) consider if we should be searching multiple
 453          * partitions (for 'invisible' partition behaviour */
 454
 455         struct ldb_control *search_control = ldb_request_get_control(req, LDB_CONTROL_SEARCH_OPTIONS_OID);
 456         struct ldb_control *domain_scope_control = ldb_request_get_control(req, LDB_CONTROL_DOMAIN_SCOPE_OID);
 457
 458         struct ldb_search_options_control *search_options = NULL;
 459         if (search_control) {
 460                 search_options = talloc_get_type(search_control->data, struct ldb_search_options_control);
 461         }
 462
 463         /* Remove the domain_scope control, so we don't confuse a backend server */
 464         if (domain_scope_control && !save_controls(domain_scope_control, req, &saved_controls)) {
 465                 ldb_oom(module->ldb);
 466                 return LDB_ERR_OPERATIONS_ERROR;
 467         }
 468
 469         /* TODO:
 470            Generate referrals (look for a partition under this DN) if we don't have the above control specified
 471         */
 472
 473         if (search_options && (search_options->search_options & LDB_SEARCH_OPTION_PHANTOM_ROOT)) {
 474                 int ret, i;
 475                 struct partition_context *ac;
 476                 if ((search_options->search_options & ~LDB_SEARCH_OPTION_PHANTOM_ROOT) == 0) {
 477                         /* We have processed this flag, so we are done with this control now */
 478
 479                         /* Remove search control, so we don't confuse a backend server */
 480                         if (search_control && !save_controls(search_control, req, &saved_controls)) {
 481                                 ldb_oom(module->ldb);
 482                                 return LDB_ERR_OPERATIONS_ERROR;
 483                         }
 484                 }
 485                 ac = partition_init_ctx(module, req);
 486                 if (!ac) {
 487                         return LDB_ERR_OPERATIONS_ERROR;
 488                 }
 489
 490                 /* Search from the base DN */
 491                 if (!req->op.search.base || ldb_dn_is_null(req->op.search.base)) {
 492                         return partition_send_all(module, ac, req);
 493                 }
 494                 for (i=0; data && data->partitions && data->partitions[i]; i++) {
 495                         /* Find all partitions under the search base */
 496                         if (ldb_dn_compare_base(data->partitions[i]->dn, req->op.search.base) == 0) {
 497                                 ret = partition_prep_request(ac, data->partitions[i]);
 498                                 if (ret != LDB_SUCCESS) {
 499                                         return ret;
 500                                 }
 501                         }
 502                 }
 503
 504                 /* Perhaps we didn't match any partitions.  Try the main partition, only */
 505                 if (ac->num_requests == 0) {
 506                         talloc_free(ac);
 507                         return ldb_next_request(module, req);
 508                 }
 509
 510                 /* fire the first one */
 511                 return partition_call_first(ac);
 512
 513         } else {
 514                 /* Handle this like all other requests */
 515                 if (search_control && (search_options->search_options & ~LDB_SEARCH_OPTION_PHANTOM_ROOT) == 0) {
 516                         /* We have processed this flag, so we are done with this control now */
 517
 518                         /* Remove search control, so we don't confuse a backend server */
 519                         if (search_control && !save_controls(search_control, req, &saved_controls)) {
 520                                 ldb_oom(module->ldb);
 521                                 return LDB_ERR_OPERATIONS_ERROR;
 522                         }
 523                 }
 524
 525                 return partition_replicate(module, req, req->op.search.base);
 526         }
 527 }
 528
 529 /* add */
 530 static int partition_add(struct ldb_module *module, struct ldb_request *req)
 531 {
 532         return partition_replicate(module, req, req->op.add.message->dn);
 533 }
 534
 535 /* modify */
 536 static int partition_modify(struct ldb_module *module, struct ldb_request *req)
 537 {
 538         return partition_replicate(module, req, req->op.mod.message->dn);
 539 }
 540
 541 /* delete */
 542 static int partition_delete(struct ldb_module *module, struct ldb_request *req)
 543 {
 544         return partition_replicate(module, req, req->op.del.dn);
 545 }
 546
 547 /* rename */
 548 static int partition_rename(struct ldb_module *module, struct ldb_request *req)
 549 {
 550         int i, matched = -1;
 551         /* Find backend */
 552         struct dsdb_control_current_partition *backend, *backend2;
 553
 554         struct partition_private_data *data = talloc_get_type(module->private_data,
 555                                                               struct partition_private_data);
 556
 557         /* Skip the lot if 'data' isn't here yet (initialization) */
 558         if (!data) {
 559                 return LDB_ERR_OPERATIONS_ERROR;
 560         }
 561
 562         backend = find_partition(data, req->op.rename.olddn);
 563         backend2 = find_partition(data, req->op.rename.newdn);
 564
 565         if ((backend && !backend2) || (!backend && backend2)) {
 566                 return LDB_ERR_AFFECTS_MULTIPLE_DSAS;
 567         }
 568
 569         if (backend != backend2) {
 570                 ldb_asprintf_errstring(module->ldb,
 571                                        "Cannot rename from %s in %s to %s in %s: %s",
 572                                        ldb_dn_get_linearized(req->op.rename.olddn),
 573                                        ldb_dn_get_linearized(backend->dn),
 574                                        ldb_dn_get_linearized(req->op.rename.newdn),
 575                                        ldb_dn_get_linearized(backend2->dn),
 576                                        ldb_strerror(LDB_ERR_AFFECTS_MULTIPLE_DSAS));
 577                 return LDB_ERR_AFFECTS_MULTIPLE_DSAS;
 578         }
 579
 580         for (i=0; data && data->partitions && data->partitions[i]; i++) {
 581                 if (ldb_dn_compare_base(data->partitions[i]->dn, req->op.rename.olddn) == 0) {
 582                         matched = i;
 583                 }
 584         }
 585
 586         if (matched > 0) {
 587                 ldb_asprintf_errstring(module->ldb,
 588                                        "Cannot rename from %s to %s, subtree rename would cross partition %s: %s",
 589                                        ldb_dn_get_linearized(req->op.rename.olddn),
 590                                        ldb_dn_get_linearized(req->op.rename.newdn),
 591                                        ldb_dn_get_linearized(data->partitions[matched]->dn),
 592                                        ldb_strerror(LDB_ERR_AFFECTS_MULTIPLE_DSAS));
 593                 return LDB_ERR_AFFECTS_MULTIPLE_DSAS;
 594         }
 595
 596         return partition_replicate(module, req, req->op.rename.olddn);
 597 }
 598
 599 /* start a transaction */
 600 static int partition_start_trans(struct ldb_module *module)
 601 {
 602         int i, ret;
 603         struct partition_private_data *data = talloc_get_type(module->private_data,
 604                                                               struct partition_private_data);
 605         /* Look at base DN */
 606         /* Figure out which partition it is under */
 607         /* Skip the lot if 'data' isn't here yet (initialization) */
 608         ret = ldb_next_start_trans(module);
 609         if (ret != LDB_SUCCESS) {
 610                 return ret;
 611         }
 612
 613         for (i=0; data && data->partitions && data->partitions[i]; i++) {
 614                 struct ldb_module *next = data->partitions[i]->module;
 615                 PARTITION_FIND_OP(next, start_transaction);
 616
 617                 ret = next->ops->start_transaction(next);
 618                 if (ret != LDB_SUCCESS) {
 619                         /* Back it out, if it fails on one */
 620                         for (i--; i >= 0; i--) {
 621                                 next = data->partitions[i]->module;
 622                                 PARTITION_FIND_OP(next, del_transaction);
 623
 624                                 next->ops->del_transaction(next);
 625                         }
 626                         ldb_next_del_trans(module);
 627                         return ret;
 628                 }
 629         }
 630         return LDB_SUCCESS;
 631 }
 632
 633 /* end a transaction */
 634 static int partition_end_trans(struct ldb_module *module)
 635 {
 636         int i, ret;
 637         struct partition_private_data *data = talloc_get_type(module->private_data,
 638                                                               struct partition_private_data);
 639         ret = ldb_next_end_trans(module);
 640         if (ret != LDB_SUCCESS) {
 641                 return ret;
 642         }
 643
 644         /* Look at base DN */
 645         /* Figure out which partition it is under */
 646         /* Skip the lot if 'data' isn't here yet (initialistion) */
 647         for (i=0; data && data->partitions && data->partitions[i]; i++) {
 648                 struct ldb_module *next = data->partitions[i]->module;
 649                 PARTITION_FIND_OP(next, end_transaction);
 650
 651                 ret = next->ops->end_transaction(next);
 652                 if (ret != LDB_SUCCESS) {
 653                         /* Back it out, if it fails on one */
 654                         for (i--; i >= 0; i--) {
 655                                 next = data->partitions[i]->module;
 656                                 PARTITION_FIND_OP(next, del_transaction);
 657
 658                                 next->ops->del_transaction(next);
 659                         }
 660                         ldb_next_del_trans(module);
 661                         return ret;
 662                 }
 663         }
 664
 665         return LDB_SUCCESS;
 666 }
 667
 668 /* delete a transaction */
 669 static int partition_del_trans(struct ldb_module *module)
 670 {
 671         int i, ret, ret2 = LDB_SUCCESS;
 672         struct partition_private_data *data = talloc_get_type(module->private_data,
 673                                                               struct partition_private_data);
 674         ret = ldb_next_del_trans(module);
 675         if (ret != LDB_SUCCESS) {
 676                 ret2 = ret;
 677         }
 678
 679         /* Look at base DN */
 680         /* Figure out which partition it is under */
 681         /* Skip the lot if 'data' isn't here yet (initialistion) */
 682         for (i=0; data && data->partitions && data->partitions[i]; i++) {
 683                 struct ldb_module *next = data->partitions[i]->module;
 684                 PARTITION_FIND_OP(next, del_transaction);
 685
 686                 ret = next->ops->del_transaction(next);
 687                 if (ret != LDB_SUCCESS) {
 688                         ret2 = ret;
 689                 }
 690         }
 691         return ret2;
 692 }
 693
 694 /* NOTE: ldb_sequence_number is still a completely SYNCHRONOUS call
 695  * implemented only in ldb_rdb. It does not require ldb_wait() to be
 696  * called after a request is made */
 697 static int partition_sequence_number(struct ldb_module *module, struct ldb_request *req)
 698 {
 699         int i, ret;
 700         uint64_t seq_number = 0;
 701         uint64_t timestamp_sequence = 0;
 702         uint64_t timestamp = 0;
 703         struct partition_private_data *data = talloc_get_type(module->private_data,
 704                                                               struct partition_private_data);
 705
 706         switch (req->op.seq_num.type) {
 707         case LDB_SEQ_NEXT:
 708         case LDB_SEQ_HIGHEST_SEQ:
 709                 ret = ldb_next_request(module, req);
 710                 if (ret != LDB_SUCCESS) {
 711                         return ret;
 712                 }
 713                 if (req->op.seq_num.flags & LDB_SEQ_TIMESTAMP_SEQUENCE) {
 714                         timestamp_sequence = req->op.seq_num.seq_num;
 715                 } else {
 716                         seq_number = seq_number + req->op.seq_num.seq_num;
 717                 }
 718
 719                 /* gross hack part1 */
 720                 ret = ldb_request_add_control(req,
 721                                         DSDB_CONTROL_CURRENT_PARTITION_OID,
 722                                         false, NULL);
 723                 if (ret != LDB_SUCCESS) {
 724                         return ret;
 725                 }
 726
 727                 /* Look at base DN */
 728                 /* Figure out which partition it is under */
 729                 /* Skip the lot if 'data' isn't here yet (initialistion) */
 730                 for (i=0; data && data->partitions && data->partitions[i]; i++) {
 731
 732                         /* gross hack part2 */
 733                         int j;
 734                         for (j=0; req->controls[j]; j++) {
 735                                 if (strcmp(req->controls[j]->oid, DSDB_CONTROL_CURRENT_PARTITION_OID) == 0) {
 736                                         req->controls[j]->data = data->partitions[i];
 737                                         break;
 738                                 }
 739                         }
 740
 741                         ret = partition_request(data->partitions[i]->module, req);
 742                         if (ret != LDB_SUCCESS) {
 743                                 return ret;
 744                         }
 745                         if (req->op.seq_num.flags & LDB_SEQ_TIMESTAMP_SEQUENCE) {
 746                                 timestamp_sequence = MAX(timestamp_sequence, req->op.seq_num.seq_num);
 747                         } else {
 748                                 seq_number = seq_number + req->op.seq_num.seq_num;
 749                         }
 750                 }
 751                 /* fall though */
 752         case LDB_SEQ_HIGHEST_TIMESTAMP:
 753         {
 754                 struct ldb_request *date_req = talloc(req, struct ldb_request);
 755                 if (!date_req) {
 756                         return LDB_ERR_OPERATIONS_ERROR;
 757                 }
 758                 *date_req = *req;
 759                 date_req->op.seq_num.flags = LDB_SEQ_HIGHEST_TIMESTAMP;
 760
 761                 ret = ldb_next_request(module, date_req);
 762                 if (ret != LDB_SUCCESS) {
 763                         return ret;
 764                 }
 765                 timestamp = date_req->op.seq_num.seq_num;
 766
 767                 /* Look at base DN */
 768                 /* Figure out which partition it is under */
 769                 /* Skip the lot if 'data' isn't here yet (initialistion) */
 770                 for (i=0; data && data->partitions && data->partitions[i]; i++) {
 771
 772                         ret = partition_request(data->partitions[i]->module, req);
 773                         if (ret != LDB_SUCCESS) {
 774                                 return ret;
 775                         }
 776                         timestamp = MAX(timestamp, date_req->op.seq_num.seq_num);
 777                 }
 778                 break;
 779         }
 780         }
 781
 782         switch (req->op.seq_num.flags) {
 783         case LDB_SEQ_NEXT:
 784         case LDB_SEQ_HIGHEST_SEQ:
 785
 786                 req->op.seq_num.flags = 0;
 787
 788                 /* Has someone above set a timebase sequence? */
 789                 if (timestamp_sequence) {
 790                         req->op.seq_num.seq_num = (((unsigned long long)timestamp << 24) | (seq_number & 0xFFFFFF));
 791                 } else {
 792                         req->op.seq_num.seq_num = seq_number;
 793                 }
 794
 795                 if (timestamp_sequence > req->op.seq_num.seq_num) {
 796                         req->op.seq_num.seq_num = timestamp_sequence;
 797                         req->op.seq_num.flags |= LDB_SEQ_TIMESTAMP_SEQUENCE;
 798                 }
 799
 800                 req->op.seq_num.flags |= LDB_SEQ_GLOBAL_SEQUENCE;
 801                 break;
 802         case LDB_SEQ_HIGHEST_TIMESTAMP:
 803                 req->op.seq_num.seq_num = timestamp;
 804                 break;
 805         }
 806
 807         switch (req->op.seq_num.flags) {
 808         case LDB_SEQ_NEXT:
 809                 req->op.seq_num.seq_num++;
 810         }
 811         return LDB_SUCCESS;
 812 }
 813
 814 static int partition_extended_replicated_objects(struct ldb_module *module, struct ldb_request *req)
 815 {
 816         struct dsdb_extended_replicated_objects *ext;
 817
 818         ext = talloc_get_type(req->op.extended.data, struct dsdb_extended_replicated_objects);
 819         if (!ext) {
 820                 ldb_debug(module->ldb, LDB_DEBUG_FATAL, "partition_extended_replicated_objects: invalid extended data\n");
 821                 return LDB_ERR_PROTOCOL_ERROR;
 822         }
 823
 824         if (ext->version != DSDB_EXTENDED_REPLICATED_OBJECTS_VERSION) {
 825                 ldb_debug(module->ldb, LDB_DEBUG_FATAL, "partition_extended_replicated_objects: extended data invalid version [%u != %u]\n",
 826                           ext->version, DSDB_EXTENDED_REPLICATED_OBJECTS_VERSION);
 827                 return LDB_ERR_PROTOCOL_ERROR;
 828         }
 829
 830         return partition_replicate(module, req, ext->partition_dn);
 831 }
 832
 833 static int partition_extended_schema_update_now(struct ldb_module *module, struct ldb_request *req)
 834 {
 835         struct dsdb_control_current_partition *partition;
 836         struct partition_private_data *data;
 837         struct ldb_dn *schema_dn;
 838         struct partition_context *ac;
 839         int ret;
 840
 841         schema_dn = talloc_get_type(req->op.extended.data, struct ldb_dn);
 842         if (!schema_dn) {
 843                 ldb_debug(module->ldb, LDB_DEBUG_FATAL, "partition_extended: invalid extended data\n");
 844                 return LDB_ERR_PROTOCOL_ERROR;
 845         }
 846
 847         data = talloc_get_type(module->private_data, struct partition_private_data);
 848         if (!data) {
 849                 return LDB_ERR_OPERATIONS_ERROR;
 850         }
 851
 852         partition = find_partition( data, schema_dn );
 853         if (!partition) {
 854                 return ldb_next_request(module, req);
 855         }
 856
 857         ac = partition_init_ctx(module, req);
 858         if (!ac) {
 859                 return LDB_ERR_OPERATIONS_ERROR;
 860         }
 861
 862         /* we need to add a control but we never touch the original request */
 863         ret = partition_prep_request(ac, partition);
 864         if (ret != LDB_SUCCESS) {
 865                 return ret;
 866         }
 867
 868         /* fire the first one */
 869         return partition_call_first(ac);
 870 }
 871
 872
 873 /* extended */
 874 static int partition_extended(struct ldb_module *module, struct ldb_request *req)
 875 {
 876         struct partition_private_data *data;
 877         struct partition_context *ac;
 878
 879         data = talloc_get_type(module->private_data, struct partition_private_data);
 880         if (!data || !data->partitions) {
 881                 return ldb_next_request(module, req);
 882         }
 883
 884         if (strcmp(req->op.extended.oid, DSDB_EXTENDED_REPLICATED_OBJECTS_OID) == 0) {
 885                 return partition_extended_replicated_objects(module, req);
 886         }
 887
 888         /* forward schemaUpdateNow operation to schema_fsmo module*/
 889         if (strcmp(req->op.extended.oid, DSDB_EXTENDED_SCHEMA_UPDATE_NOW_OID) == 0) {
 890                 return partition_extended_schema_update_now( module, req );
 891         }
 892
 893         /*
 894          * as the extended operation has no dn
 895          * we need to send it to all partitions
 896          */
 897
 898         ac = partition_init_ctx(module, req);
 899         if (!ac) {
 900                 return LDB_ERR_OPERATIONS_ERROR;
 901         }
 902
 903         return partition_send_all(module, ac, req);
 904 }
 905
 906 static int partition_sort_compare(const void *v1, const void *v2)
 907 {
 908         struct dsdb_control_current_partition *p1;
 909         struct dsdb_control_current_partition *p2;
 910
 911         p1 = *((struct dsdb_control_current_partition **)v1);
 912         p2 = *((struct dsdb_control_current_partition **)v2);
 913
 914         return ldb_dn_compare(p1->dn, p2->dn);
 915 }
 916
 917 static int partition_init(struct ldb_module *module)
 918 {
 919         int ret, i;
 920         TALLOC_CTX *mem_ctx = talloc_new(module);
 921         const char *attrs[] = { "partition", "replicateEntries", "modules", NULL };
 922         struct ldb_result *res;
 923         struct ldb_message *msg;
 924         struct ldb_message_element *partition_attributes;
 925         struct ldb_message_element *replicate_attributes;
 926         struct ldb_message_element *modules_attributes;
 927
 928         struct partition_private_data *data;
 929
 930         if (!mem_ctx) {
 931                 return LDB_ERR_OPERATIONS_ERROR;
 932         }
 933
 934         data = talloc(mem_ctx, struct partition_private_data);
 935         if (data == NULL) {
 936                 return LDB_ERR_OPERATIONS_ERROR;
 937         }
 938
 939         ret = ldb_search(module->ldb, mem_ctx, &res,
 940                          ldb_dn_new(mem_ctx, module->ldb, "@PARTITION"),
 941                          LDB_SCOPE_BASE, attrs, NULL);
 942         if (ret != LDB_SUCCESS) {
 943                 talloc_free(mem_ctx);
 944                 return ret;
 945         }
 946         if (res->count == 0) {
 947                 talloc_free(mem_ctx);
 948                 return ldb_next_init(module);
 949         }
 950
 951         if (res->count > 1) {
 952                 talloc_free(mem_ctx);
 953                 return LDB_ERR_CONSTRAINT_VIOLATION;
 954         }
 955
 956         msg = res->msgs[0];
 957
 958         partition_attributes = ldb_msg_find_element(msg, "partition");
 959         if (!partition_attributes) {
 960                 ldb_set_errstring(module->ldb, "partition_init: no partitions specified");
 961                 talloc_free(mem_ctx);
 962                 return LDB_ERR_CONSTRAINT_VIOLATION;
 963         }
 964         data->partitions = talloc_array(data, struct dsdb_control_current_partition *, partition_attributes->num_values + 1);
 965         if (!data->partitions) {
 966                 talloc_free(mem_ctx);
 967                 return LDB_ERR_OPERATIONS_ERROR;
 968         }
 969         for (i=0; i < partition_attributes->num_values; i++) {
 970                 char *base = talloc_strdup(data->partitions, (char *)partition_attributes->values[i].data);
 971                 char *p = strchr(base, ':');
 972                 if (!p) {
 973                         ldb_asprintf_errstring(module->ldb,
 974                                                 "partition_init: "
 975                                                 "invalid form for partition record (missing ':'): %s", base);
 976                         talloc_free(mem_ctx);
 977                         return LDB_ERR_CONSTRAINT_VIOLATION;
 978                 }
 979                 p[0] = '\0';
 980                 p++;
 981                 if (!p[0]) {
 982                         ldb_asprintf_errstring(module->ldb,
 983                                                 "partition_init: "
 984                                                 "invalid form for partition record (missing backend database): %s", base);
 985                         talloc_free(mem_ctx);
 986                         return LDB_ERR_CONSTRAINT_VIOLATION;
 987                 }
 988                 data->partitions[i] = talloc(data->partitions, struct dsdb_control_current_partition);
 989                 if (!data->partitions[i]) {
 990                         talloc_free(mem_ctx);
 991                         return LDB_ERR_OPERATIONS_ERROR;
 992                 }
 993                 data->partitions[i]->version = DSDB_CONTROL_CURRENT_PARTITION_VERSION;
 994
 995                 data->partitions[i]->dn = ldb_dn_new(data->partitions[i], module->ldb, base);
 996                 if (!data->partitions[i]->dn) {
 997                         ldb_asprintf_errstring(module->ldb,
 998                                                 "partition_init: invalid DN in partition record: %s", base);
 999                         talloc_free(mem_ctx);
1000                         return LDB_ERR_CONSTRAINT_VIOLATION;
1001                 }
1002
1003                 data->partitions[i]->backend = samdb_relative_path(module->ldb,
1004                                                                    data->partitions[i],
1005                                                                    p);
1006                 if (!data->partitions[i]->backend) {
1007                         ldb_asprintf_errstring(module->ldb,
1008                                                 "partition_init: unable to determine an relative path for partition: %s", base);
1009                         talloc_free(mem_ctx);
1010                 }
1011                 ret = ldb_connect_backend(module->ldb, data->partitions[i]->backend, NULL, &data->partitions[i]->module);
1012                 if (ret != LDB_SUCCESS) {
1013                         talloc_free(mem_ctx);
1014                         return ret;
1015                 }
1016         }
1017         data->partitions[i] = NULL;
1018
1019         /* sort these into order, most to least specific */
1020         qsort(data->partitions, partition_attributes->num_values,
1021               sizeof(*data->partitions), partition_sort_compare);
1022
1023         for (i=0; data->partitions[i]; i++) {
1024                 struct ldb_request *req;
1025                 req = talloc_zero(mem_ctx, struct ldb_request);
1026                 if (req == NULL) {
1027                         ldb_debug(module->ldb, LDB_DEBUG_ERROR, "partition: Out of memory!\n");
1028                         talloc_free(mem_ctx);
1029                         return LDB_ERR_OPERATIONS_ERROR;
1030                 }
1031
1032                 req->operation = LDB_REQ_REGISTER_PARTITION;
1033                 req->op.reg_partition.dn = data->partitions[i]->dn;
1034                 req->callback = ldb_op_default_callback;
1035
1036                 ldb_set_timeout(module->ldb, req, 0);
1037
1038                 req->handle = ldb_handle_new(req, module->ldb);
1039                 if (req->handle == NULL) {
1040                         return LDB_ERR_OPERATIONS_ERROR;
1041                 }
1042
1043                 ret = ldb_request(module->ldb, req);
1044                 if (ret == LDB_SUCCESS) {
1045                         ret = ldb_wait(req->handle, LDB_WAIT_ALL);
1046                 }
1047                 if (ret != LDB_SUCCESS) {
1048                         ldb_debug(module->ldb, LDB_DEBUG_ERROR, "partition: Unable to register partition with rootdse!\n");
1049                         talloc_free(mem_ctx);
1050                         return LDB_ERR_OTHER;
1051                 }
1052                 talloc_free(req);
1053         }
1054
1055         replicate_attributes = ldb_msg_find_element(msg, "replicateEntries");
1056         if (!replicate_attributes) {
1057                 data->replicate = NULL;
1058         } else {
1059                 data->replicate = talloc_array(data, struct ldb_dn *, replicate_attributes->num_values + 1);
1060                 if (!data->replicate) {
1061                         talloc_free(mem_ctx);
1062                         return LDB_ERR_OPERATIONS_ERROR;
1063                 }
1064
1065                 for (i=0; i < replicate_attributes->num_values; i++) {
1066                         data->replicate[i] = ldb_dn_from_ldb_val(data->replicate, module->ldb, &replicate_attributes->values[i]);
1067                         if (!ldb_dn_validate(data->replicate[i])) {
1068                                 ldb_asprintf_errstring(module->ldb,
1069                                                         "partition_init: "
1070                                                         "invalid DN in partition replicate record: %s",
1071                                                         replicate_attributes->values[i].data);
1072                                 talloc_free(mem_ctx);
1073                                 return LDB_ERR_CONSTRAINT_VIOLATION;
1074                         }
1075                 }
1076                 data->replicate[i] = NULL;
1077         }
1078
1079         /* Make the private data available to any searches the modules may trigger in initialisation */
1080         module->private_data = data;
1081         talloc_steal(module, data);
1082
1083         modules_attributes = ldb_msg_find_element(msg, "modules");
1084         if (modules_attributes) {
1085                 for (i=0; i < modules_attributes->num_values; i++) {
1086                         struct ldb_dn *base_dn;
1087                         int partition_idx;
1088                         struct dsdb_control_current_partition *partition = NULL;
1089                         const char **modules = NULL;
1090
1091                         char *base = talloc_strdup(data->partitions, (char *)modules_attributes->values[i].data);
1092                         char *p = strchr(base, ':');
1093                         if (!p) {
1094                                 ldb_asprintf_errstring(module->ldb,
1095                                                         "partition_init: "
1096                                                         "invalid form for partition module record (missing ':'): %s", base);
1097                                 talloc_free(mem_ctx);
1098                                 return LDB_ERR_CONSTRAINT_VIOLATION;
1099                         }
1100                         p[0] = '\0';
1101                         p++;
1102                         if (!p[0]) {
1103                                 ldb_asprintf_errstring(module->ldb,
1104                                                         "partition_init: "
1105                                                         "invalid form for partition module record (missing backend database): %s", base);
1106                                 talloc_free(mem_ctx);
1107                                 return LDB_ERR_CONSTRAINT_VIOLATION;
1108                         }
1109
1110                         modules = ldb_modules_list_from_string(module->ldb, mem_ctx,
1111                                                                p);
1112
1113                         base_dn = ldb_dn_new(mem_ctx, module->ldb, base);
1114                         if (!ldb_dn_validate(base_dn)) {
1115                                 talloc_free(mem_ctx);
1116                                 return LDB_ERR_OPERATIONS_ERROR;
1117                         }
1118
1119                         for (partition_idx = 0; data->partitions[partition_idx]; partition_idx++) {
1120                                 if (ldb_dn_compare(data->partitions[partition_idx]->dn, base_dn) == 0) {
1121                                         partition = data->partitions[partition_idx];
1122                                         break;
1123                                 }
1124                         }
1125
1126                         if (!partition) {
1127                                 ldb_asprintf_errstring(module->ldb,
1128                                                         "partition_init: "
1129                                                         "invalid form for partition module record (no such partition): %s", base);
1130                                 talloc_free(mem_ctx);
1131                                 return LDB_ERR_CONSTRAINT_VIOLATION;
1132                         }
1133
1134                         ret = ldb_load_modules_list(module->ldb, modules, partition->module, &partition->module);
1135                         if (ret != LDB_SUCCESS) {
1136                                 ldb_asprintf_errstring(module->ldb,
1137                                                        "partition_init: "
1138                                                        "loading backend for %s failed: %s",
1139                                                        base, ldb_errstring(module->ldb));
1140                                 talloc_free(mem_ctx);
1141                                 return ret;
1142                         }
1143                         ret = ldb_init_module_chain(module->ldb, partition->module);
1144                         if (ret != LDB_SUCCESS) {
1145                                 ldb_asprintf_errstring(module->ldb,
1146                                                        "partition_init: "
1147                                                        "initialising backend for %s failed: %s",
1148                                                        base, ldb_errstring(module->ldb));
1149                                 talloc_free(mem_ctx);
1150                                 return ret;
1151                         }
1152                 }
1153         }
1154
1155         talloc_free(mem_ctx);
1156         return ldb_next_init(module);
1157 }
1158
1159 _PUBLIC_ const struct ldb_module_ops ldb_partition_module_ops = {
1160         .name              = "partition",
1161         .init_context      = partition_init,
1162         .search            = partition_search,
1163         .add               = partition_add,
1164         .modify            = partition_modify,
1165         .del               = partition_delete,
1166         .rename            = partition_rename,
1167         .extended          = partition_extended,
1168         .sequence_number   = partition_sequence_number,
1169         .start_transaction = partition_start_trans,
1170         .end_transaction   = partition_end_trans,
1171         .del_transaction   = partition_del_trans,
1172 };