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    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 /*
  22  *  Name: ldb
  23  *
  24  *  Component: ldb partitions module
  25  *
  26  *  Description: Implement LDAP partitions
  27  *
  28  *  Author: Andrew Bartlett
  29  *  Author: Stefan Metzmacher
  30  */
  31
  32 #include "dsdb/samdb/ldb_modules/partition.h"
  33
  34 struct part_request {
  35         struct ldb_module *module;
  36         struct ldb_request *req;
  37 };
  38
  39 struct partition_context {
  40         struct ldb_module *module;
  41         struct ldb_request *req;
  42
  43         struct part_request *part_req;
  44         unsigned int num_requests;
  45         unsigned int finished_requests;
  46
  47         const char **referrals;
  48 };
  49
  50 static struct partition_context *partition_init_ctx(struct ldb_module *module, struct ldb_request *req)
  51 {
  52         struct partition_context *ac;
  53
  54         ac = talloc_zero(req, struct partition_context);
  55         if (ac == NULL) {
  56                 ldb_set_errstring(ldb_module_get_ctx(module), "Out of Memory");
  57                 return NULL;
  58         }
  59
  60         ac->module = module;
  61         ac->req = req;
  62
  63         return ac;
  64 }
  65
  66 /*
  67  * helper functions to call the next module in chain
  68  */
  69 int partition_request(struct ldb_module *module, struct ldb_request *request)
  70 {
  71         if ((module && module->ldb->flags & LDB_FLG_ENABLE_TRACING)) { \
  72                 const struct dsdb_control_current_partition *partition = NULL;
  73                 struct ldb_control *partition_ctrl = ldb_request_get_control(request, DSDB_CONTROL_CURRENT_PARTITION_OID);
  74                 if (partition_ctrl) {
  75                         partition = talloc_get_type(partition_ctrl->data,
  76                                                     struct dsdb_control_current_partition);
  77                 }
  78
  79                 if (partition != NULL) {
  80                         ldb_debug(module->ldb, LDB_DEBUG_TRACE, "partition_request() -> %s",
  81                                   ldb_dn_get_linearized(partition->dn));
  82                 } else {
  83                         ldb_debug(module->ldb, LDB_DEBUG_TRACE, "partition_request() -> (metadata partition)");
  84                 }
  85         }
  86
  87         return ldb_next_request(module, request);
  88 }
  89
  90 static struct dsdb_partition *find_partition(struct partition_private_data *data,
  91                                              struct ldb_dn *dn,
  92                                              struct ldb_request *req)
  93 {
  94         unsigned int i;
  95         struct ldb_control *partition_ctrl;
  96
  97         /* see if the request has the partition DN specified in a
  98          * control. The repl_meta_data module can specify this to
  99          * ensure that replication happens to the right partition
 100          */
 101         partition_ctrl = ldb_request_get_control(req, DSDB_CONTROL_CURRENT_PARTITION_OID);
 102         if (partition_ctrl) {
 103                 const struct dsdb_control_current_partition *partition;
 104                 partition = talloc_get_type(partition_ctrl->data,
 105                                             struct dsdb_control_current_partition);
 106                 if (partition != NULL) {
 107                         dn = partition->dn;
 108                 }
 109         }
 110
 111         if (dn == NULL) {
 112                 return NULL;
 113         }
 114
 115         /* Look at base DN */
 116         /* Figure out which partition it is under */
 117         /* Skip the lot if 'data' isn't here yet (initialisation) */
 118         for (i=0; data && data->partitions && data->partitions[i]; i++) {
 119                 if (ldb_dn_compare_base(data->partitions[i]->ctrl->dn, dn) == 0) {
 120                         return data->partitions[i];
 121                 }
 122         }
 123
 124         return NULL;
 125 }
 126
 127 /**
 128  * fire the caller's callback for every entry, but only send 'done' once.
 129  */
 130 static int partition_req_callback(struct ldb_request *req,
 131                                   struct ldb_reply *ares)
 132 {
 133         struct partition_context *ac;
 134         struct ldb_module *module;
 135         struct ldb_request *nreq;
 136         int ret;
 137         struct partition_private_data *data;
 138         struct ldb_control *partition_ctrl;
 139
 140         ac = talloc_get_type(req->context, struct partition_context);
 141         data = talloc_get_type(ac->module->private_data, struct partition_private_data);
 142
 143         if (!ares) {
 144                 return ldb_module_done(ac->req, NULL, NULL,
 145                                         LDB_ERR_OPERATIONS_ERROR);
 146         }
 147
 148         partition_ctrl = ldb_request_get_control(req, DSDB_CONTROL_CURRENT_PARTITION_OID);
 149         if (partition_ctrl && (ac->num_requests == 1 || ares->type == LDB_REPLY_ENTRY)) {
 150                 /* If we didn't fan this request out to mulitple partitions,
 151                  * or this is an individual search result, we can
 152                  * deterministily tell the caller what partition this was
 153                  * written to (repl_meta_data likes to know) */
 154                 ret = ldb_reply_add_control(ares,
 155                                             DSDB_CONTROL_CURRENT_PARTITION_OID,
 156                                             false, partition_ctrl->data);
 157                 if (ret != LDB_SUCCESS) {
 158                         return ldb_module_done(ac->req, NULL, NULL,
 159                                                ret);
 160                 }
 161         }
 162
 163         if (ares->error != LDB_SUCCESS) {
 164                 return ldb_module_done(ac->req, ares->controls,
 165                                         ares->response, ares->error);
 166         }
 167
 168         switch (ares->type) {
 169         case LDB_REPLY_REFERRAL:
 170                 return ldb_module_send_referral(ac->req, ares->referral);
 171
 172         case LDB_REPLY_ENTRY:
 173                 if (ac->req->operation != LDB_SEARCH) {
 174                         ldb_set_errstring(ldb_module_get_ctx(ac->module),
 175                                 "partition_req_callback:"
 176                                 " Unsupported reply type for this request");
 177                         return ldb_module_done(ac->req, NULL, NULL,
 178                                                 LDB_ERR_OPERATIONS_ERROR);
 179                 }
 180
 181                 return ldb_module_send_entry(ac->req, ares->message, ares->controls);
 182
 183         case LDB_REPLY_DONE:
 184                 if (ac->req->operation == LDB_EXTENDED) {
 185                         /* FIXME: check for ares->response, replmd does not fill it ! */
 186                         if (ares->response) {
 187                                 if (strcmp(ares->response->oid, LDB_EXTENDED_START_TLS_OID) != 0) {
 188                                         ldb_set_errstring(ldb_module_get_ctx(ac->module),
 189                                                           "partition_req_callback:"
 190                                                           " Unknown extended reply, "
 191                                                           "only supports START_TLS");
 192                                         talloc_free(ares);
 193                                         return ldb_module_done(ac->req, NULL, NULL,
 194                                                                 LDB_ERR_OPERATIONS_ERROR);
 195                                 }
 196                         }
 197                 }
 198
 199                 ac->finished_requests++;
 200                 if (ac->finished_requests == ac->num_requests) {
 201                         /* Send back referrals if they do exist (search ops) */
 202                         if (ac->referrals != NULL) {
 203                                 const char **ref;
 204                                 for (ref = ac->referrals; *ref != NULL; ++ref) {
 205                                         ret = ldb_module_send_referral(ac->req,
 206                                                                        talloc_strdup(ac->req, *ref));
 207                                         if (ret != LDB_SUCCESS) {
 208                                                 return ldb_module_done(ac->req, NULL, NULL,
 209                                                                        ret);
 210                                         }
 211                                 }
 212                         }
 213
 214                         /* this was the last one, call callback */
 215                         return ldb_module_done(ac->req, ares->controls,
 216                                                ares->response,
 217                                                ares->error);
 218                 }
 219
 220                 /* not the last, now call the next one */
 221                 module = ac->part_req[ac->finished_requests].module;
 222                 nreq = ac->part_req[ac->finished_requests].req;
 223
 224                 ret = partition_request(module, nreq);
 225                 if (ret != LDB_SUCCESS) {
 226                         talloc_free(ares);
 227                         return ldb_module_done(ac->req, NULL, NULL, ret);
 228                 }
 229
 230                 break;
 231         }
 232
 233         talloc_free(ares);
 234         return LDB_SUCCESS;
 235 }
 236
 237 static int partition_prep_request(struct partition_context *ac,
 238                                   struct dsdb_partition *partition)
 239 {
 240         int ret;
 241         struct ldb_request *req;
 242
 243         ac->part_req = talloc_realloc(ac, ac->part_req,
 244                                         struct part_request,
 245                                         ac->num_requests + 1);
 246         if (ac->part_req == NULL) {
 247                 return ldb_oom(ldb_module_get_ctx(ac->module));
 248         }
 249
 250         switch (ac->req->operation) {
 251         case LDB_SEARCH:
 252                 ret = ldb_build_search_req_ex(&req, ldb_module_get_ctx(ac->module),
 253                                         ac->part_req,
 254                                         ac->req->op.search.base,
 255                                         ac->req->op.search.scope,
 256                                         ac->req->op.search.tree,
 257                                         ac->req->op.search.attrs,
 258                                         ac->req->controls,
 259                                         ac, partition_req_callback,
 260                                         ac->req);
 261                 LDB_REQ_SET_LOCATION(req);
 262                 break;
 263         case LDB_ADD:
 264                 ret = ldb_build_add_req(&req, ldb_module_get_ctx(ac->module), ac->part_req,
 265                                         ac->req->op.add.message,
 266                                         ac->req->controls,
 267                                         ac, partition_req_callback,
 268                                         ac->req);
 269                 LDB_REQ_SET_LOCATION(req);
 270                 break;
 271         case LDB_MODIFY:
 272                 ret = ldb_build_mod_req(&req, ldb_module_get_ctx(ac->module), ac->part_req,
 273                                         ac->req->op.mod.message,
 274                                         ac->req->controls,
 275                                         ac, partition_req_callback,
 276                                         ac->req);
 277                 LDB_REQ_SET_LOCATION(req);
 278                 break;
 279         case LDB_DELETE:
 280                 ret = ldb_build_del_req(&req, ldb_module_get_ctx(ac->module), ac->part_req,
 281                                         ac->req->op.del.dn,
 282                                         ac->req->controls,
 283                                         ac, partition_req_callback,
 284                                         ac->req);
 285                 LDB_REQ_SET_LOCATION(req);
 286                 break;
 287         case LDB_RENAME:
 288                 ret = ldb_build_rename_req(&req, ldb_module_get_ctx(ac->module), ac->part_req,
 289                                         ac->req->op.rename.olddn,
 290                                         ac->req->op.rename.newdn,
 291                                         ac->req->controls,
 292                                         ac, partition_req_callback,
 293                                         ac->req);
 294                 LDB_REQ_SET_LOCATION(req);
 295                 break;
 296         case LDB_EXTENDED:
 297                 ret = ldb_build_extended_req(&req, ldb_module_get_ctx(ac->module),
 298                                         ac->part_req,
 299                                         ac->req->op.extended.oid,
 300                                         ac->req->op.extended.data,
 301                                         ac->req->controls,
 302                                         ac, partition_req_callback,
 303                                         ac->req);
 304                 LDB_REQ_SET_LOCATION(req);
 305                 break;
 306         default:
 307                 ldb_set_errstring(ldb_module_get_ctx(ac->module),
 308                                   "Unsupported request type!");
 309                 ret = LDB_ERR_UNWILLING_TO_PERFORM;
 310         }
 311
 312         if (ret != LDB_SUCCESS) {
 313                 return ret;
 314         }
 315
 316         ac->part_req[ac->num_requests].req = req;
 317
 318         if (ac->req->controls) {
 319                 req->controls = talloc_memdup(req, ac->req->controls,
 320                                         talloc_get_size(ac->req->controls));
 321                 if (req->controls == NULL) {
 322                         return ldb_oom(ldb_module_get_ctx(ac->module));
 323                 }
 324         }
 325
 326         if (partition) {
 327                 ac->part_req[ac->num_requests].module = partition->module;
 328
 329                 if (!ldb_request_get_control(req, DSDB_CONTROL_CURRENT_PARTITION_OID)) {
 330                         ret = ldb_request_add_control(req,
 331                                                       DSDB_CONTROL_CURRENT_PARTITION_OID,
 332                                                       false, partition->ctrl);
 333                         if (ret != LDB_SUCCESS) {
 334                                 return ret;
 335                         }
 336                 }
 337
 338                 if (req->operation == LDB_SEARCH) {
 339                         /* If the search is for 'more' than this partition,
 340                          * then change the basedn, so a remote LDAP server
 341                          * doesn't object */
 342                         if (ldb_dn_compare_base(partition->ctrl->dn,
 343                                                 req->op.search.base) != 0) {
 344                                 req->op.search.base = partition->ctrl->dn;
 345                         }
 346                 }
 347
 348         } else {
 349                 /* make sure you put the module here, or
 350                  * or ldb_next_request() will skip a module */
 351                 ac->part_req[ac->num_requests].module = ac->module;
 352         }
 353
 354         ac->num_requests++;
 355
 356         return LDB_SUCCESS;
 357 }
 358
 359 static int partition_call_first(struct partition_context *ac)
 360 {
 361         return partition_request(ac->part_req[0].module, ac->part_req[0].req);
 362 }
 363
 364 /**
 365  * Send a request down to all the partitions
 366  */
 367 static int partition_send_all(struct ldb_module *module,
 368                               struct partition_context *ac,
 369                               struct ldb_request *req)
 370 {
 371         unsigned int i;
 372         struct partition_private_data *data = talloc_get_type(module->private_data,
 373                                                               struct partition_private_data);
 374         int ret = partition_prep_request(ac, NULL);
 375         if (ret != LDB_SUCCESS) {
 376                 return ret;
 377         }
 378         for (i=0; data && data->partitions && data->partitions[i]; i++) {
 379                 ret = partition_prep_request(ac, data->partitions[i]);
 380                 if (ret != LDB_SUCCESS) {
 381                         return ret;
 382                 }
 383         }
 384
 385         /* fire the first one */
 386         return partition_call_first(ac);
 387 }
 388
 389 /**
 390  * Figure out which backend a request needs to be aimed at.  Some
 391  * requests must be replicated to all backends
 392  */
 393 static int partition_replicate(struct ldb_module *module, struct ldb_request *req, struct ldb_dn *dn)
 394 {
 395         struct partition_context *ac;
 396         unsigned int i;
 397         int ret;
 398         struct dsdb_partition *partition;
 399         struct partition_private_data *data = talloc_get_type(module->private_data,
 400                                                               struct partition_private_data);
 401         if (!data || !data->partitions) {
 402                 return ldb_next_request(module, req);
 403         }
 404
 405         if (req->operation != LDB_SEARCH && ldb_dn_is_special(dn)) {
 406                 /* Is this a special DN, we need to replicate to every backend? */
 407                 for (i=0; data->replicate && data->replicate[i]; i++) {
 408                         if (ldb_dn_compare(data->replicate[i],
 409                                            dn) == 0) {
 410
 411                                 ac = partition_init_ctx(module, req);
 412                                 if (!ac) {
 413                                         return ldb_operr(ldb_module_get_ctx(module));
 414                                 }
 415
 416                                 return partition_send_all(module, ac, req);
 417                         }
 418                 }
 419         }
 420
 421         /* Otherwise, we need to find the partition to fire it to */
 422
 423         /* Find partition */
 424         partition = find_partition(data, dn, req);
 425         if (!partition) {
 426                 /*
 427                  * if we haven't found a matching partition
 428                  * pass the request to the main ldb
 429                  *
 430                  * TODO: we should maybe return an error here
 431                  *       if it's not a special dn
 432                  */
 433
 434                 return ldb_next_request(module, req);
 435         }
 436
 437         ac = partition_init_ctx(module, req);
 438         if (!ac) {
 439                 return ldb_operr(ldb_module_get_ctx(module));
 440         }
 441
 442         /* we need to add a control but we never touch the original request */
 443         ret = partition_prep_request(ac, partition);
 444         if (ret != LDB_SUCCESS) {
 445                 return ret;
 446         }
 447
 448         /* fire the first one */
 449         return partition_call_first(ac);
 450 }
 451
 452 /* search */
 453 static int partition_search(struct ldb_module *module, struct ldb_request *req)
 454 {
 455         struct ldb_control **saved_controls;
 456         /* Find backend */
 457         struct partition_private_data *data = talloc_get_type(module->private_data,
 458                                                               struct partition_private_data);
 459         struct partition_context *ac;
 460         struct ldb_context *ldb;
 461         struct loadparm_context *lp_ctx;
 462
 463         struct ldb_control *search_control = ldb_request_get_control(req, LDB_CONTROL_SEARCH_OPTIONS_OID);
 464         struct ldb_control *domain_scope_control = ldb_request_get_control(req, LDB_CONTROL_DOMAIN_SCOPE_OID);
 465
 466         struct ldb_search_options_control *search_options = NULL;
 467         struct dsdb_partition *p;
 468         unsigned int i, j;
 469         int ret;
 470         bool domain_scope = false, phantom_root = false;
 471
 472         ret = partition_reload_if_required(module, data);
 473         if (ret != LDB_SUCCESS) {
 474                 return ret;
 475         }
 476
 477         p = find_partition(data, NULL, req);
 478         if (p != NULL) {
 479                 /* the caller specified what partition they want the
 480                  * search - just pass it on
 481                  */
 482                 return ldb_next_request(p->module, req);
 483         }
 484
 485         /* Get back the search options from the search control, and mark it as
 486          * non-critical (to make backends and also dcpromo happy).
 487          */
 488         if (search_control) {
 489                 search_options = talloc_get_type(search_control->data, struct ldb_search_options_control);
 490                 search_control->critical = 0;
 491
 492         }
 493
 494         /* Remove the "domain_scope" control, so we don't confuse a backend
 495          * server */
 496         if (domain_scope_control && !save_controls(domain_scope_control, req, &saved_controls)) {
 497                 return ldb_oom(ldb_module_get_ctx(module));
 498         }
 499
 500         /* Locate the options */
 501         domain_scope = (search_options
 502                 && (search_options->search_options & LDB_SEARCH_OPTION_DOMAIN_SCOPE))
 503                 || domain_scope_control;
 504         phantom_root = search_options
 505                 && (search_options->search_options & LDB_SEARCH_OPTION_PHANTOM_ROOT);
 506
 507         /* Remove handled options from the search control flag */
 508         if (search_options) {
 509                 search_options->search_options = search_options->search_options
 510                         & ~LDB_SEARCH_OPTION_DOMAIN_SCOPE
 511                         & ~LDB_SEARCH_OPTION_PHANTOM_ROOT;
 512         }
 513
 514         if (!data || !data->partitions) {
 515                 return ldb_next_request(module, req);
 516         }
 517
 518         ac = partition_init_ctx(module, req);
 519         if (!ac) {
 520                 return ldb_operr(ldb_module_get_ctx(module));
 521         }
 522
 523         ldb = ldb_module_get_ctx(ac->module);
 524         lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
 525                                                 struct loadparm_context);
 526
 527         /* Search from the base DN */
 528         if (ldb_dn_is_null(req->op.search.base)) {
 529                 return partition_send_all(module, ac, req);
 530         }
 531
 532         for (i=0; data->partitions[i]; i++) {
 533                 bool match = false, stop = false;
 534
 535                 if (phantom_root) {
 536                         /* Phantom root: Find all partitions under the
 537                          * search base. We match if:
 538                          *
 539                          * 1) the DN we are looking for exactly matches a
 540                          *    certain partition and always stop
 541                          * 2) the DN we are looking for is a parent of certain
 542                          *    partitions and it isn't a scope base search
 543                          * 3) the DN we are looking for is a child of a certain
 544                          *    partition and always stop
 545                          *    - we don't need to go any further up in the
 546                          *    hierarchy!
 547                          */
 548                         if (ldb_dn_compare(data->partitions[i]->ctrl->dn,
 549                                            req->op.search.base) == 0) {
 550                                 match = true;
 551                                 stop = true;
 552                         }
 553                         if (!match &&
 554                             (ldb_dn_compare_base(req->op.search.base,
 555                                                  data->partitions[i]->ctrl->dn) == 0 &&
 556                              req->op.search.scope != LDB_SCOPE_BASE)) {
 557                                 match = true;
 558                         }
 559                         if (!match &&
 560                             ldb_dn_compare_base(data->partitions[i]->ctrl->dn,
 561                                                 req->op.search.base) == 0) {
 562                                 match = true;
 563                                 stop = true; /* note that this relies on partition ordering */
 564                         }
 565                 } else {
 566                         /* Domain scope: Find all partitions under the search
 567                          * base.
 568                          *
 569                          * We generate referral candidates if we haven't
 570                          * specified the domain scope control, haven't a base
 571                          * search* scope and the DN we are looking for is a real
 572                          * predecessor of certain partitions. When a new
 573                          * referral candidate is nearer to the DN than an
 574                          * existing one delete the latter (we want to have only
 575                          * the closest ones). When we checked this for all
 576                          * candidates we have the final referrals.
 577                          *
 578                          * We match if the DN we are looking for is a child of
 579                          * a certain partition or the partition
 580                          * DN itself - we don't need to go any further
 581                          * up in the hierarchy!
 582                          */
 583                         if ((!domain_scope) &&
 584                             (req->op.search.scope != LDB_SCOPE_BASE) &&
 585                             (ldb_dn_compare_base(req->op.search.base,
 586                                                  data->partitions[i]->ctrl->dn) == 0) &&
 587                             (ldb_dn_compare(req->op.search.base,
 588                                             data->partitions[i]->ctrl->dn) != 0)) {
 589                                 char *ref = talloc_asprintf(ac,
 590                                                             "ldap://%s/%s%s",
 591                                                             lpcfg_dnsdomain(lp_ctx),
 592                                                             ldb_dn_get_linearized(data->partitions[i]->ctrl->dn),
 593                                                             req->op.search.scope == LDB_SCOPE_ONELEVEL ? "??base" : "");
 594
 595                                 if (ref == NULL) {
 596                                         return ldb_oom(ldb);
 597                                 }
 598
 599                                 /* Initialise the referrals list */
 600                                 if (ac->referrals == NULL) {
 601                                         ac->referrals = (const char **) str_list_make_empty(ac);
 602                                         if (ac->referrals == NULL) {
 603                                                 return ldb_oom(ldb);
 604                                         }
 605                                 }
 606
 607                                 /* Check if the new referral candidate is
 608                                  * closer to the base DN than already
 609                                  * saved ones and delete the latters */
 610                                 j = 0;
 611                                 while (ac->referrals[j] != NULL) {
 612                                         if (strstr(ac->referrals[j],
 613                                                    ldb_dn_get_linearized(data->partitions[i]->ctrl->dn)) != NULL) {
 614                                                 str_list_remove(ac->referrals,
 615                                                                 ac->referrals[j]);
 616                                         } else {
 617                                                 ++j;
 618                                         }
 619                                 }
 620
 621                                 /* Add our new candidate */
 622                                 ac->referrals = str_list_add(ac->referrals, ref);
 623
 624                                 talloc_free(ref);
 625
 626                                 if (ac->referrals == NULL) {
 627                                         return ldb_oom(ldb);
 628                                 }
 629                         }
 630                         if (ldb_dn_compare_base(data->partitions[i]->ctrl->dn, req->op.search.base) == 0) {
 631                                 match = true;
 632                                 stop = true; /* note that this relies on partition ordering */
 633                         }
 634                 }
 635
 636                 if (match) {
 637                         ret = partition_prep_request(ac, data->partitions[i]);
 638                         if (ret != LDB_SUCCESS) {
 639                                 return ret;
 640                         }
 641                 }
 642
 643                 if (stop) break;
 644         }
 645
 646         /* Perhaps we didn't match any partitions. Try the main partition */
 647         if (ac->num_requests == 0) {
 648                 talloc_free(ac);
 649                 return ldb_next_request(module, req);
 650         }
 651
 652         /* fire the first one */
 653         return partition_call_first(ac);
 654 }
 655
 656 /* add */
 657 static int partition_add(struct ldb_module *module, struct ldb_request *req)
 658 {
 659         return partition_replicate(module, req, req->op.add.message->dn);
 660 }
 661
 662 /* modify */
 663 static int partition_modify(struct ldb_module *module, struct ldb_request *req)
 664 {
 665         return partition_replicate(module, req, req->op.mod.message->dn);
 666 }
 667
 668 /* delete */
 669 static int partition_delete(struct ldb_module *module, struct ldb_request *req)
 670 {
 671         return partition_replicate(module, req, req->op.del.dn);
 672 }
 673
 674 /* rename */
 675 static int partition_rename(struct ldb_module *module, struct ldb_request *req)
 676 {
 677         /* Find backend */
 678         struct dsdb_partition *backend, *backend2;
 679
 680         struct partition_private_data *data = talloc_get_type(module->private_data,
 681                                                               struct partition_private_data);
 682
 683         /* Skip the lot if 'data' isn't here yet (initialisation) */
 684         if (!data) {
 685                 return ldb_operr(ldb_module_get_ctx(module));
 686         }
 687
 688         backend = find_partition(data, req->op.rename.olddn, req);
 689         backend2 = find_partition(data, req->op.rename.newdn, req);
 690
 691         if ((backend && !backend2) || (!backend && backend2)) {
 692                 return LDB_ERR_AFFECTS_MULTIPLE_DSAS;
 693         }
 694
 695         if (backend != backend2) {
 696                 ldb_asprintf_errstring(ldb_module_get_ctx(module),
 697                                        "Cannot rename from %s in %s to %s in %s: %s",
 698                                        ldb_dn_get_linearized(req->op.rename.olddn),
 699                                        ldb_dn_get_linearized(backend->ctrl->dn),
 700                                        ldb_dn_get_linearized(req->op.rename.newdn),
 701                                        ldb_dn_get_linearized(backend2->ctrl->dn),
 702                                        ldb_strerror(LDB_ERR_AFFECTS_MULTIPLE_DSAS));
 703                 return LDB_ERR_AFFECTS_MULTIPLE_DSAS;
 704         }
 705
 706         return partition_replicate(module, req, req->op.rename.olddn);
 707 }
 708
 709 /* start a transaction */
 710 static int partition_start_trans(struct ldb_module *module)
 711 {
 712         unsigned int i;
 713         int ret;
 714         struct partition_private_data *data = talloc_get_type(module->private_data,
 715                                                               struct partition_private_data);
 716         /* Look at base DN */
 717         /* Figure out which partition it is under */
 718         /* Skip the lot if 'data' isn't here yet (initialization) */
 719         if ((module && module->ldb->flags & LDB_FLG_ENABLE_TRACING)) {
 720                 ldb_debug(module->ldb, LDB_DEBUG_TRACE, "partition_start_trans() -> (metadata partition)");
 721         }
 722         ret = ldb_next_start_trans(module);
 723         if (ret != LDB_SUCCESS) {
 724                 return ret;
 725         }
 726
 727         ret = partition_reload_if_required(module, data);
 728         if (ret != LDB_SUCCESS) {
 729                 return ret;
 730         }
 731
 732         for (i=0; data && data->partitions && data->partitions[i]; i++) {
 733                 if ((module && module->ldb->flags & LDB_FLG_ENABLE_TRACING)) {
 734                         ldb_debug(module->ldb, LDB_DEBUG_TRACE, "partition_start_trans() -> %s",
 735                                   ldb_dn_get_linearized(data->partitions[i]->ctrl->dn));
 736                 }
 737                 ret = ldb_next_start_trans(data->partitions[i]->module);
 738                 if (ret != LDB_SUCCESS) {
 739                         /* Back it out, if it fails on one */
 740                         for (i--; i >= 0; i--) {
 741                                 ldb_next_del_trans(data->partitions[i]->module);
 742                         }
 743                         ldb_next_del_trans(module);
 744                         return ret;
 745                 }
 746         }
 747
 748         data->in_transaction++;
 749
 750         return LDB_SUCCESS;
 751 }
 752
 753 /* prepare for a commit */
 754 static int partition_prepare_commit(struct ldb_module *module)
 755 {
 756         unsigned int i;
 757         struct partition_private_data *data = talloc_get_type(module->private_data,
 758                                                               struct partition_private_data);
 759
 760         for (i=0; data && data->partitions && data->partitions[i]; i++) {
 761                 int ret;
 762
 763                 if ((module && module->ldb->flags & LDB_FLG_ENABLE_TRACING)) {
 764                         ldb_debug(module->ldb, LDB_DEBUG_TRACE, "partition_prepare_commit() -> %s",
 765                                   ldb_dn_get_linearized(data->partitions[i]->ctrl->dn));
 766                 }
 767                 ret = ldb_next_prepare_commit(data->partitions[i]->module);
 768                 if (ret != LDB_SUCCESS) {
 769                         ldb_asprintf_errstring(module->ldb, "prepare_commit error on %s: %s",
 770                                                ldb_dn_get_linearized(data->partitions[i]->ctrl->dn),
 771                                                ldb_errstring(module->ldb));
 772                         return ret;
 773                 }
 774         }
 775
 776         if ((module && module->ldb->flags & LDB_FLG_ENABLE_TRACING)) {
 777                 ldb_debug(module->ldb, LDB_DEBUG_TRACE, "partition_prepare_commit() -> (metadata partition)");
 778         }
 779         return ldb_next_prepare_commit(module);
 780 }
 781
 782
 783 /* end a transaction */
 784 static int partition_end_trans(struct ldb_module *module)
 785 {
 786         int ret, ret2;
 787         unsigned int i;
 788         struct partition_private_data *data = talloc_get_type(module->private_data,
 789                                                               struct partition_private_data);
 790
 791         ret = LDB_SUCCESS;
 792
 793         if (data->in_transaction == 0) {
 794                 DEBUG(0,("partition end transaction mismatch\n"));
 795                 ret = LDB_ERR_OPERATIONS_ERROR;
 796         } else {
 797                 data->in_transaction--;
 798         }
 799
 800         for (i=0; data && data->partitions && data->partitions[i]; i++) {
 801                 if ((module && module->ldb->flags & LDB_FLG_ENABLE_TRACING)) {
 802                         ldb_debug(module->ldb, LDB_DEBUG_TRACE, "partition_end_trans() -> %s",
 803                                   ldb_dn_get_linearized(data->partitions[i]->ctrl->dn));
 804                 }
 805                 ret2 = ldb_next_end_trans(data->partitions[i]->module);
 806                 if (ret2 != LDB_SUCCESS) {
 807                         ldb_asprintf_errstring(module->ldb, "end_trans error on %s: %s",
 808                                                ldb_dn_get_linearized(data->partitions[i]->ctrl->dn),
 809                                                ldb_errstring(module->ldb));
 810                         ret = ret2;
 811                 }
 812         }
 813
 814         if ((module && module->ldb->flags & LDB_FLG_ENABLE_TRACING)) {
 815                 ldb_debug(module->ldb, LDB_DEBUG_TRACE, "partition_end_trans() -> (metadata partition)");
 816         }
 817         ret2 = ldb_next_end_trans(module);
 818         if (ret2 != LDB_SUCCESS) {
 819                 ret = ret2;
 820         }
 821         return ret;
 822 }
 823
 824 /* delete a transaction */
 825 static int partition_del_trans(struct ldb_module *module)
 826 {
 827         int ret, final_ret = LDB_SUCCESS;
 828         unsigned int i;
 829         struct partition_private_data *data = talloc_get_type(module->private_data,
 830                                                               struct partition_private_data);
 831         for (i=0; data && data->partitions && data->partitions[i]; i++) {
 832                 if ((module && module->ldb->flags & LDB_FLG_ENABLE_TRACING)) {
 833                         ldb_debug(module->ldb, LDB_DEBUG_TRACE, "partition_del_trans() -> %s",
 834                                   ldb_dn_get_linearized(data->partitions[i]->ctrl->dn));
 835                 }
 836                 ret = ldb_next_del_trans(data->partitions[i]->module);
 837                 if (ret != LDB_SUCCESS) {
 838                         ldb_asprintf_errstring(module->ldb, "del_trans error on %s: %s",
 839                                                ldb_dn_get_linearized(data->partitions[i]->ctrl->dn),
 840                                                ldb_errstring(module->ldb));
 841                         final_ret = ret;
 842                 }
 843         }
 844
 845         if (data->in_transaction == 0) {
 846                 DEBUG(0,("partition del transaction mismatch\n"));
 847                 return ldb_operr(ldb_module_get_ctx(module));
 848         }
 849         data->in_transaction--;
 850
 851         if ((module && module->ldb->flags & LDB_FLG_ENABLE_TRACING)) {
 852                 ldb_debug(module->ldb, LDB_DEBUG_TRACE, "partition_del_trans() -> (metadata partition)");
 853         }
 854         ret = ldb_next_del_trans(module);
 855         if (ret != LDB_SUCCESS) {
 856                 final_ret = ret;
 857         }
 858         return final_ret;
 859 }
 860
 861 int partition_primary_sequence_number(struct ldb_module *module, TALLOC_CTX *mem_ctx,
 862                                      enum ldb_sequence_type type, uint64_t *seq_number)
 863 {
 864         int ret;
 865         struct ldb_result *res;
 866         struct ldb_seqnum_request *tseq;
 867         struct ldb_request *treq;
 868         struct ldb_seqnum_result *seqr;
 869         res = talloc_zero(mem_ctx, struct ldb_result);
 870         if (res == NULL) {
 871                 return ldb_oom(ldb_module_get_ctx(module));
 872         }
 873         tseq = talloc_zero(res, struct ldb_seqnum_request);
 874         if (tseq == NULL) {
 875                 talloc_free(res);
 876                 return ldb_oom(ldb_module_get_ctx(module));
 877         }
 878         tseq->type = type;
 879
 880         ret = ldb_build_extended_req(&treq, ldb_module_get_ctx(module), res,
 881                                      LDB_EXTENDED_SEQUENCE_NUMBER,
 882                                      tseq,
 883                                      NULL,
 884                                      res,
 885                                      ldb_extended_default_callback,
 886                                      NULL);
 887         LDB_REQ_SET_LOCATION(treq);
 888         if (ret != LDB_SUCCESS) {
 889                 talloc_free(res);
 890                 return ret;
 891         }
 892
 893         ret = ldb_next_request(module, treq);
 894         if (ret != LDB_SUCCESS) {
 895                 talloc_free(res);
 896                 return ret;
 897         }
 898         ret = ldb_wait(treq->handle, LDB_WAIT_ALL);
 899         if (ret != LDB_SUCCESS) {
 900                 talloc_free(res);
 901                 return ret;
 902         }
 903
 904         seqr = talloc_get_type(res->extended->data,
 905                                struct ldb_seqnum_result);
 906         if (seqr->flags & LDB_SEQ_TIMESTAMP_SEQUENCE) {
 907                 ret = LDB_ERR_OPERATIONS_ERROR;
 908                 ldb_set_errstring(ldb_module_get_ctx(module), "Primary backend in partitions module returned a timestamp based seq number (must return a normal number)");
 909                 talloc_free(res);
 910                 return ret;
 911         } else {
 912                 *seq_number = seqr->seq_num;
 913         }
 914         talloc_free(res);
 915         return LDB_SUCCESS;
 916 }
 917
 918 /* FIXME: This function is still semi-async */
 919 static int partition_sequence_number(struct ldb_module *module, struct ldb_request *req)
 920 {
 921         int ret;
 922         unsigned int i;
 923         uint64_t seq_number = 0;
 924         uint64_t timestamp_sequence = 0;
 925         uint64_t timestamp = 0;
 926         struct partition_private_data *data = talloc_get_type(module->private_data,
 927                                                               struct partition_private_data);
 928         struct ldb_seqnum_request *seq;
 929         struct ldb_seqnum_result *seqr;
 930         struct ldb_request *treq;
 931         struct ldb_seqnum_request *tseq;
 932         struct ldb_seqnum_result *tseqr;
 933         struct ldb_extended *ext;
 934         struct ldb_result *res;
 935         struct dsdb_partition *p;
 936
 937         p = find_partition(data, NULL, req);
 938         if (p != NULL) {
 939                 /* the caller specified what partition they want the
 940                  * sequence number operation on - just pass it on
 941                  */
 942                 return ldb_next_request(p->module, req);
 943         }
 944
 945         seq = talloc_get_type(req->op.extended.data, struct ldb_seqnum_request);
 946
 947         switch (seq->type) {
 948         case LDB_SEQ_NEXT:
 949         case LDB_SEQ_HIGHEST_SEQ:
 950
 951                 ret = partition_primary_sequence_number(module, req, seq->type, &seq_number);
 952                 if (ret != LDB_SUCCESS) {
 953                         return ret;
 954                 }
 955
 956                 /* Skip the lot if 'data' isn't here yet (initialisation) */
 957                 for (i=0; data && data->partitions && data->partitions[i]; i++) {
 958
 959                         res = talloc_zero(req, struct ldb_result);
 960                         if (res == NULL) {
 961                                 return ldb_oom(ldb_module_get_ctx(module));
 962                         }
 963                         tseq = talloc_zero(res, struct ldb_seqnum_request);
 964                         if (tseq == NULL) {
 965                                 talloc_free(res);
 966                                 return ldb_oom(ldb_module_get_ctx(module));
 967                         }
 968                         tseq->type = seq->type;
 969
 970                         ret = ldb_build_extended_req(&treq, ldb_module_get_ctx(module), res,
 971                                                      LDB_EXTENDED_SEQUENCE_NUMBER,
 972                                                      tseq,
 973                                                      NULL,
 974                                                      res,
 975                                                      ldb_extended_default_callback,
 976                                                      NULL);
 977                         LDB_REQ_SET_LOCATION(treq);
 978                         if (ret != LDB_SUCCESS) {
 979                                 talloc_free(res);
 980                                 return ret;
 981                         }
 982
 983                         if (!ldb_request_get_control(treq, DSDB_CONTROL_CURRENT_PARTITION_OID)) {
 984                                 ret = ldb_request_add_control(treq,
 985                                                               DSDB_CONTROL_CURRENT_PARTITION_OID,
 986                                                               false, data->partitions[i]->ctrl);
 987                                 if (ret != LDB_SUCCESS) {
 988                                         talloc_free(res);
 989                                         return ret;
 990                                 }
 991                         }
 992
 993                         ret = partition_request(data->partitions[i]->module, treq);
 994                         if (ret != LDB_SUCCESS) {
 995                                 talloc_free(res);
 996                                 return ret;
 997                         }
 998                         ret = ldb_wait(treq->handle, LDB_WAIT_ALL);
 999                         if (ret != LDB_SUCCESS) {
1000                                 talloc_free(res);
1001                                 return ret;
1002                         }
1003                         tseqr = talloc_get_type(res->extended->data,
1004                                                 struct ldb_seqnum_result);
1005                         if (tseqr->flags & LDB_SEQ_TIMESTAMP_SEQUENCE) {
1006                                 timestamp_sequence = MAX(timestamp_sequence,
1007                                                          tseqr->seq_num);
1008                         } else {
1009                                 seq_number += tseqr->seq_num;
1010                         }
1011                         talloc_free(res);
1012                 }
1013                 /* fall through */
1014         case LDB_SEQ_HIGHEST_TIMESTAMP:
1015
1016                 res = talloc_zero(req, struct ldb_result);
1017                 if (res == NULL) {
1018                         return ldb_oom(ldb_module_get_ctx(module));
1019                 }
1020
1021                 tseq = talloc_zero(res, struct ldb_seqnum_request);
1022                 if (tseq == NULL) {
1023                         talloc_free(res);
1024                         return ldb_oom(ldb_module_get_ctx(module));
1025                 }
1026                 tseq->type = LDB_SEQ_HIGHEST_TIMESTAMP;
1027
1028                 ret = ldb_build_extended_req(&treq, ldb_module_get_ctx(module), res,
1029                                              LDB_EXTENDED_SEQUENCE_NUMBER,
1030                                              tseq,
1031                                              NULL,
1032                                              res,
1033                                              ldb_extended_default_callback,
1034                                              NULL);
1035                 LDB_REQ_SET_LOCATION(treq);
1036                 if (ret != LDB_SUCCESS) {
1037                         talloc_free(res);
1038                         return ret;
1039                 }
1040
1041                 ret = ldb_next_request(module, treq);
1042                 if (ret != LDB_SUCCESS) {
1043                         talloc_free(res);
1044                         return ret;
1045                 }
1046                 ret = ldb_wait(treq->handle, LDB_WAIT_ALL);
1047                 if (ret != LDB_SUCCESS) {
1048                         talloc_free(res);
1049                         return ret;
1050                 }
1051
1052                 tseqr = talloc_get_type(res->extended->data,
1053                                            struct ldb_seqnum_result);
1054                 timestamp = tseqr->seq_num;
1055
1056                 talloc_free(res);
1057
1058                 /* Skip the lot if 'data' isn't here yet (initialisation) */
1059                 for (i=0; data && data->partitions && data->partitions[i]; i++) {
1060
1061                         res = talloc_zero(req, struct ldb_result);
1062                         if (res == NULL) {
1063                                 return ldb_oom(ldb_module_get_ctx(module));
1064                         }
1065
1066                         tseq = talloc_zero(res, struct ldb_seqnum_request);
1067                         if (tseq == NULL) {
1068                                 talloc_free(res);
1069                                 return ldb_oom(ldb_module_get_ctx(module));
1070                         }
1071                         tseq->type = LDB_SEQ_HIGHEST_TIMESTAMP;
1072
1073                         ret = ldb_build_extended_req(&treq, ldb_module_get_ctx(module), res,
1074                                                      LDB_EXTENDED_SEQUENCE_NUMBER,
1075                                                      tseq,
1076                                                      NULL,
1077                                                      res,
1078                                                      ldb_extended_default_callback,
1079                                                      NULL);
1080                         LDB_REQ_SET_LOCATION(treq);
1081                         if (ret != LDB_SUCCESS) {
1082                                 talloc_free(res);
1083                                 return ret;
1084                         }
1085
1086                         if (!ldb_request_get_control(treq, DSDB_CONTROL_CURRENT_PARTITION_OID)) {
1087                                 ret = ldb_request_add_control(treq,
1088                                                               DSDB_CONTROL_CURRENT_PARTITION_OID,
1089                                                               false, data->partitions[i]->ctrl);
1090                                 if (ret != LDB_SUCCESS) {
1091                                         talloc_free(res);
1092                                         return ret;
1093                                 }
1094                         }
1095
1096                         ret = partition_request(data->partitions[i]->module, treq);
1097                         if (ret != LDB_SUCCESS) {
1098                                 talloc_free(res);
1099                                 return ret;
1100                         }
1101                         ret = ldb_wait(treq->handle, LDB_WAIT_ALL);
1102                         if (ret != LDB_SUCCESS) {
1103                                 talloc_free(res);
1104                                 return ret;
1105                         }
1106
1107                         tseqr = talloc_get_type(res->extended->data,
1108                                                   struct ldb_seqnum_result);
1109                         timestamp = MAX(timestamp, tseqr->seq_num);
1110
1111                         talloc_free(res);
1112                 }
1113
1114                 break;
1115         }
1116
1117         ext = talloc_zero(req, struct ldb_extended);
1118         if (!ext) {
1119                 return ldb_oom(ldb_module_get_ctx(module));
1120         }
1121         seqr = talloc_zero(ext, struct ldb_seqnum_result);
1122         if (seqr == NULL) {
1123                 talloc_free(ext);
1124                 return ldb_oom(ldb_module_get_ctx(module));
1125         }
1126         ext->oid = LDB_EXTENDED_SEQUENCE_NUMBER;
1127         ext->data = seqr;
1128
1129         switch (seq->type) {
1130         case LDB_SEQ_NEXT:
1131         case LDB_SEQ_HIGHEST_SEQ:
1132
1133                 /* Has someone above set a timebase sequence? */
1134                 if (timestamp_sequence) {
1135                         seqr->seq_num = (((unsigned long long)timestamp << 24) | (seq_number & 0xFFFFFF));
1136                 } else {
1137                         seqr->seq_num = seq_number;
1138                 }
1139
1140                 if (timestamp_sequence > seqr->seq_num) {
1141                         seqr->seq_num = timestamp_sequence;
1142                         seqr->flags |= LDB_SEQ_TIMESTAMP_SEQUENCE;
1143                 }
1144
1145                 seqr->flags |= LDB_SEQ_GLOBAL_SEQUENCE;
1146                 break;
1147         case LDB_SEQ_HIGHEST_TIMESTAMP:
1148                 seqr->seq_num = timestamp;
1149                 break;
1150         }
1151
1152         if (seq->type == LDB_SEQ_NEXT) {
1153                 seqr->seq_num++;
1154         }
1155
1156         /* send request done */
1157         return ldb_module_done(req, NULL, ext, LDB_SUCCESS);
1158 }
1159
1160 /* extended */
1161 static int partition_extended(struct ldb_module *module, struct ldb_request *req)
1162 {
1163         struct partition_private_data *data;
1164         struct partition_context *ac;
1165         int ret;
1166
1167         data = talloc_get_type(module->private_data, struct partition_private_data);
1168         if (!data) {
1169                 return ldb_next_request(module, req);
1170         }
1171
1172         ret = partition_reload_if_required(module, data);
1173         if (ret != LDB_SUCCESS) {
1174                 return ret;
1175         }
1176
1177         if (strcmp(req->op.extended.oid, LDB_EXTENDED_SEQUENCE_NUMBER) == 0) {
1178                 return partition_sequence_number(module, req);
1179         }
1180
1181         if (strcmp(req->op.extended.oid, DSDB_EXTENDED_CREATE_PARTITION_OID) == 0) {
1182                 return partition_create(module, req);
1183         }
1184
1185         /*
1186          * as the extended operation has no dn
1187          * we need to send it to all partitions
1188          */
1189
1190         ac = partition_init_ctx(module, req);
1191         if (!ac) {
1192                 return ldb_operr(ldb_module_get_ctx(module));
1193         }
1194
1195         return partition_send_all(module, ac, req);
1196 }
1197
1198 _PUBLIC_ const struct ldb_module_ops ldb_partition_module_ops = {
1199         .name              = "partition",
1200         .init_context      = partition_init,
1201         .search            = partition_search,
1202         .add               = partition_add,
1203         .modify            = partition_modify,
1204         .del               = partition_delete,
1205         .rename            = partition_rename,
1206         .extended          = partition_extended,
1207         .start_transaction = partition_start_trans,
1208         .prepare_commit    = partition_prepare_commit,
1209         .end_transaction   = partition_end_trans,
1210         .del_transaction   = partition_del_trans,
1211 };