lib/ldb/ldb_map/ldb_map_inbound.c

   1 /*
   2    ldb database mapping module
   3
   4    Copyright (C) Jelmer Vernooij 2005
   5    Copyright (C) Martin Kuehl <mkhl@samba.org> 2006
   6    Copyright (C) Simo Sorce <idra@samba.org> 2008
   7
   8      ** NOTE! The following LGPL license applies to the ldb
   9      ** library. This does NOT imply that all of Samba is released
  10      ** under the LGPL
  11
  12    This library is free software; you can redistribute it and/or
  13    modify it under the terms of the GNU Lesser General Public
  14    License as published by the Free Software Foundation; either
  15    version 3 of the License, or (at your option) any later version.
  16
  17    This library is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20    Lesser General Public License for more details.
  21
  22    You should have received a copy of the GNU Lesser General Public
  23    License along with this library; if not, see <http://www.gnu.org/licenses/>.
  24
  25 */
  26
  27 #include "replace.h"
  28 #include "system/filesys.h"
  29 #include "system/time.h"
  30 #include "ldb_map.h"
  31 #include "ldb_map_private.h"
  32
  33
  34 /* Mapping message elements
  35  * ======================== */
  36
  37 /* Map a message element into the remote partition. */
  38 static struct ldb_message_element *ldb_msg_el_map_local(struct ldb_module *module, void *mem_ctx, const struct ldb_map_attribute *map, const struct ldb_message_element *old)
  39 {
  40         struct ldb_message_element *el;
  41         unsigned int i;
  42
  43         el = talloc_zero(mem_ctx, struct ldb_message_element);
  44         if (el == NULL) {
  45                 map_oom(module);
  46                 return NULL;
  47         }
  48
  49         el->num_values = old->num_values;
  50         el->values = talloc_array(el, struct ldb_val, el->num_values);
  51         if (el->values == NULL) {
  52                 talloc_free(el);
  53                 map_oom(module);
  54                 return NULL;
  55         }
  56
  57         el->name = map_attr_map_local(el, map, old->name);
  58
  59         for (i = 0; i < el->num_values; i++) {
  60                 el->values[i] = ldb_val_map_local(module, el->values, map, &old->values[i]);
  61         }
  62
  63         return el;
  64 }
  65
  66 /* Add a message element either to a local or to a remote message,
  67  * depending on whether it goes into the local or remote partition. */
  68 static int ldb_msg_el_partition(struct ldb_module *module, enum ldb_request_type optype, struct ldb_message *local, struct ldb_message *remote, const struct ldb_message *msg, const char *attr_name, /* const char * const names[], */ const struct ldb_message_element *old)
  69 {
  70         const struct ldb_map_context *data = map_get_context(module);
  71         const struct ldb_map_attribute *map = map_attr_find_local(data, attr_name);
  72         struct ldb_message_element *el=NULL;
  73         struct ldb_context *ldb = ldb_module_get_ctx(module);
  74
  75         /* Unknown attribute: ignore */
  76         if (map == NULL) {
  77                 ldb_debug(ldb, LDB_DEBUG_WARNING, "ldb_map: "
  78                           "Not mapping attribute '%s': no mapping found",
  79                           old->name);
  80                 goto local;
  81         }
  82
  83         switch (map->type) {
  84         case LDB_MAP_RENDROP:
  85                 if (optype != LDB_ADD) {
  86                         /* do the same as LDB_MAP_RENAME */
  87                         el = ldb_msg_el_map_local(module, remote, map, old);
  88                         break;
  89                 }
  90                 /* fall through */
  91         case LDB_MAP_IGNORE:
  92                 goto local;
  93
  94         case LDB_MAP_CONVERT:
  95                 if (map->u.convert.convert_local == NULL) {
  96                         ldb_debug(ldb, LDB_DEBUG_WARNING, "ldb_map: "
  97                                   "Not mapping attribute '%s': "
  98                                   "'convert_local' not set",
  99                                   map->local_name);
 100                         goto local;
 101                 }
 102                 /* fall through */
 103         case LDB_MAP_KEEP:
 104         case LDB_MAP_RENAME:
 105                 el = ldb_msg_el_map_local(module, remote, map, old);
 106                 break;
 107
 108         case LDB_MAP_GENERATE:
 109                 if (map->u.generate.generate_remote == NULL) {
 110                         ldb_debug(ldb, LDB_DEBUG_WARNING, "ldb_map: "
 111                                   "Not mapping attribute '%s': "
 112                                   "'generate_remote' not set",
 113                                   map->local_name);
 114                         goto local;
 115                 }
 116
 117                 /* TODO: if this attr requires context:
 118                  *       make sure all context attrs are mappable (in 'names')
 119                  *       make sure all context attrs have already been mapped?
 120                  *       maybe postpone generation until they have been mapped?
 121                  */
 122
 123                 map->u.generate.generate_remote(module, map->local_name, msg, remote, local);
 124                 return 0;
 125         }
 126
 127         if (el == NULL) {
 128                 return -1;
 129         }
 130
 131         return ldb_msg_add(remote, el, old->flags);
 132
 133 local:
 134         el = talloc(local, struct ldb_message_element);
 135         if (el == NULL) {
 136                 map_oom(module);
 137                 return -1;
 138         }
 139
 140         *el = *old;                     /* copy the old element */
 141
 142         return ldb_msg_add(local, el, old->flags);
 143 }
 144
 145 /* Mapping messages
 146  * ================ */
 147
 148 /* Check whether a message will be (partially) mapped into the remote partition. */
 149 static bool ldb_msg_check_remote(struct ldb_module *module, const struct ldb_message *msg)
 150 {
 151         const struct ldb_map_context *data = map_get_context(module);
 152         bool ret;
 153         unsigned int i;
 154
 155         for (i = 0; i < msg->num_elements; i++) {
 156                 ret = map_attr_check_remote(data, msg->elements[i].name);
 157                 if (ret) {
 158                         return ret;
 159                 }
 160         }
 161
 162         return false;
 163 }
 164
 165 /* Split message elements that stay in the local partition from those
 166  * that are mapped into the remote partition. */
 167 static int ldb_msg_partition(struct ldb_module *module, enum ldb_request_type optype, struct ldb_message *local, struct ldb_message *remote, const struct ldb_message *msg)
 168 {
 169         /* const char * const names[]; */
 170         struct ldb_context *ldb;
 171         unsigned int i;
 172         int ret;
 173
 174         ldb = ldb_module_get_ctx(module);
 175
 176         for (i = 0; i < msg->num_elements; i++) {
 177                 /* Skip 'IS_MAPPED' */
 178                 if (ldb_attr_cmp(msg->elements[i].name, IS_MAPPED) == 0) {
 179                         ldb_debug(ldb, LDB_DEBUG_WARNING, "ldb_map: "
 180                                   "Skipping attribute '%s'",
 181                                   msg->elements[i].name);
 182                         continue;
 183                 }
 184
 185                 ret = ldb_msg_el_partition(module, optype, local, remote, msg, msg->elements[i].name, &msg->elements[i]);
 186                 if (ret) {
 187                         return ret;
 188                 }
 189         }
 190
 191         return 0;
 192 }
 193
 194
 195 static int map_add_do_local(struct map_context *ac);
 196 static int map_modify_do_local(struct map_context *ac);
 197 static int map_delete_do_local(struct map_context *ac);
 198 static int map_rename_do_local(struct map_context *ac);
 199 static int map_rename_do_fixup(struct map_context *ac);
 200 static int map_rename_local_callback(struct ldb_request *req,
 201                                      struct ldb_reply *ares);
 202
 203
 204 /*****************************************************************************
 205  * COMMON INBOUND functions
 206 *****************************************************************************/
 207
 208 /* Store the DN of a single search result in context. */
 209 static int map_search_self_callback(struct ldb_request *req, struct ldb_reply *ares)
 210 {
 211         struct ldb_context *ldb;
 212         struct map_context *ac;
 213         int ret;
 214
 215         ac = talloc_get_type(req->context, struct map_context);
 216         ldb = ldb_module_get_ctx(ac->module);
 217
 218         if (!ares) {
 219                 return ldb_module_done(ac->req, NULL, NULL,
 220                                         LDB_ERR_OPERATIONS_ERROR);
 221         }
 222         if (ares->error != LDB_SUCCESS) {
 223                 return ldb_module_done(ac->req, ares->controls,
 224                                         ares->response, ares->error);
 225         }
 226
 227         /* We are interested only in the single reply */
 228         switch(ares->type) {
 229         case LDB_REPLY_ENTRY:
 230                 /* We have already found a remote DN */
 231                 if (ac->local_dn) {
 232                         ldb_set_errstring(ldb,
 233                                           "Too many results!");
 234                         return ldb_module_done(ac->req, NULL, NULL,
 235                                                 LDB_ERR_OPERATIONS_ERROR);
 236                 }
 237
 238                 /* Store local DN */
 239                 ac->local_dn = talloc_steal(ac, ares->message->dn);
 240                 break;
 241
 242         case LDB_REPLY_DONE:
 243
 244                 switch (ac->req->operation) {
 245                 case LDB_MODIFY:
 246                         ret = map_modify_do_local(ac);
 247                         break;
 248                 case LDB_DELETE:
 249                         ret = map_delete_do_local(ac);
 250                         break;
 251                 case LDB_RENAME:
 252                         ret = map_rename_do_local(ac);
 253                         break;
 254                 default:
 255                         /* if we get here we have definitely a problem */
 256                         ret = LDB_ERR_OPERATIONS_ERROR;
 257                 }
 258                 if (ret != LDB_SUCCESS) {
 259                         return ldb_module_done(ac->req, NULL, NULL,
 260                                                 LDB_ERR_OPERATIONS_ERROR);
 261                 }
 262
 263         default:
 264                 /* ignore referrals */
 265                 break;
 266         }
 267
 268         talloc_free(ares);
 269         return LDB_SUCCESS;
 270 }
 271
 272 /* Build a request to search the local record by its DN. */
 273 static int map_search_self_req(struct ldb_request **req,
 274                                 struct map_context *ac,
 275                                 struct ldb_dn *dn)
 276 {
 277         /* attrs[] is returned from this function in
 278          * ac->search_req->op.search.attrs, so it must be static, as
 279          * otherwise the compiler can put it on the stack */
 280         static const char * const attrs[] = { IS_MAPPED, NULL };
 281         struct ldb_parse_tree *tree;
 282
 283         /* Limit search to records with 'IS_MAPPED' present */
 284         tree = ldb_parse_tree(ac, "(" IS_MAPPED "=*)");
 285         if (tree == NULL) {
 286                 map_oom(ac->module);
 287                 return LDB_ERR_OPERATIONS_ERROR;
 288         }
 289
 290         *req = map_search_base_req(ac, dn, attrs, tree,
 291                                    ac, map_search_self_callback);
 292         if (*req == NULL) {
 293                 return LDB_ERR_OPERATIONS_ERROR;
 294         }
 295
 296         return LDB_SUCCESS;
 297 }
 298
 299 static int map_op_local_callback(struct ldb_request *req,
 300                                  struct ldb_reply *ares)
 301 {
 302         struct ldb_context *ldb;
 303         struct map_context *ac;
 304         int ret;
 305
 306         ac = talloc_get_type(req->context, struct map_context);
 307         ldb = ldb_module_get_ctx(ac->module);
 308
 309         if (!ares) {
 310                 return ldb_module_done(ac->req, NULL, NULL,
 311                                         LDB_ERR_OPERATIONS_ERROR);
 312         }
 313         if (ares->error != LDB_SUCCESS) {
 314                 return ldb_module_done(ac->req, ares->controls,
 315                                         ares->response, ares->error);
 316         }
 317
 318         if (ares->type != LDB_REPLY_DONE) {
 319                 ldb_asprintf_errstring(ldb, "Invalid LDB reply type %d", ares->type);
 320                 return ldb_module_done(ac->req, NULL, NULL,
 321                                         LDB_ERR_OPERATIONS_ERROR);
 322         }
 323
 324         /* Do the remote request. */
 325         ret = ldb_next_remote_request(ac->module, ac->remote_req);
 326         if (ret != LDB_SUCCESS) {
 327                 return ldb_module_done(ac->req, NULL, NULL,
 328                                         LDB_ERR_OPERATIONS_ERROR);
 329         }
 330
 331         return LDB_SUCCESS;
 332 }
 333
 334 static int map_op_remote_callback(struct ldb_request *req,
 335                                   struct ldb_reply *ares)
 336 {
 337         struct ldb_context *ldb;
 338         struct map_context *ac;
 339
 340         ac = talloc_get_type(req->context, struct map_context);
 341         ldb = ldb_module_get_ctx(ac->module);
 342
 343         if (!ares) {
 344                 return ldb_module_done(ac->req, NULL, NULL,
 345                                         LDB_ERR_OPERATIONS_ERROR);
 346         }
 347         if (ares->error != LDB_SUCCESS) {
 348                 return ldb_module_done(ac->req, ares->controls,
 349                                         ares->response, ares->error);
 350         }
 351
 352         if (ares->type != LDB_REPLY_DONE) {
 353                 ldb_asprintf_errstring(ldb, "Invalid LDB reply type %d", ares->type);
 354                 return ldb_module_done(ac->req, NULL, NULL,
 355                                         LDB_ERR_OPERATIONS_ERROR);
 356         }
 357
 358         return ldb_module_done(ac->req, ares->controls,
 359                                         ares->response, ares->error);
 360 }
 361
 362
 363 /*****************************************************************************
 364  * ADD operations
 365 *****************************************************************************/
 366
 367
 368 /* Add a record. */
 369 int ldb_map_add(struct ldb_module *module, struct ldb_request *req)
 370 {
 371         const struct ldb_message *msg = req->op.add.message;
 372         struct ldb_context *ldb;
 373         struct map_context *ac;
 374         struct ldb_message *remote_msg;
 375         int ret;
 376
 377         ldb = ldb_module_get_ctx(module);
 378
 379         /* Do not manipulate our control entries */
 380         if (ldb_dn_is_special(msg->dn)) {
 381                 return ldb_next_request(module, req);
 382         }
 383
 384         /* No mapping requested (perhaps no DN mapping specified), skip to next module */
 385         if (!ldb_dn_check_local(module, msg->dn)) {
 386                 return ldb_next_request(module, req);
 387         }
 388
 389         /* No mapping needed, fail */
 390         if (!ldb_msg_check_remote(module, msg)) {
 391                 return LDB_ERR_OPERATIONS_ERROR;
 392         }
 393
 394         /* Prepare context and handle */
 395         ac = map_init_context(module, req);
 396         if (ac == NULL) {
 397                 return LDB_ERR_OPERATIONS_ERROR;
 398         }
 399
 400
 401         /* Prepare the local message */
 402         ac->local_msg = ldb_msg_new(ac);
 403         if (ac->local_msg == NULL) {
 404                 map_oom(module);
 405                 return LDB_ERR_OPERATIONS_ERROR;
 406         }
 407         ac->local_msg->dn = msg->dn;
 408
 409         /* Prepare the remote message */
 410         remote_msg = ldb_msg_new(ac);
 411         if (remote_msg == NULL) {
 412                 map_oom(module);
 413                 return LDB_ERR_OPERATIONS_ERROR;
 414         }
 415         remote_msg->dn = ldb_dn_map_local(ac->module, remote_msg, msg->dn);
 416
 417         /* Split local from remote message */
 418         ldb_msg_partition(module, req->operation, ac->local_msg, remote_msg, msg);
 419
 420         /* Prepare the remote operation */
 421         ret = ldb_build_add_req(&ac->remote_req, ldb,
 422                                 ac, remote_msg,
 423                                 req->controls,
 424                                 ac, map_op_remote_callback,
 425                                 req);
 426         LDB_REQ_SET_LOCATION(ac->remote_req);
 427         if (ret != LDB_SUCCESS) {
 428                 return LDB_ERR_OPERATIONS_ERROR;
 429         }
 430
 431         if ((ac->local_msg->num_elements == 0) ||
 432             ( ! map_check_local_db(ac->module))) {
 433                 /* No local data or db, just run the remote request */
 434                 return ldb_next_remote_request(ac->module, ac->remote_req);
 435         }
 436
 437         /* Store remote DN in 'IS_MAPPED' */
 438         /* TODO: use GUIDs here instead */
 439         ret = ldb_msg_add_linearized_dn(ac->local_msg, IS_MAPPED,
 440                                         remote_msg->dn);
 441         if (ret != LDB_SUCCESS) {
 442                 return LDB_ERR_OPERATIONS_ERROR;
 443         }
 444
 445         return map_add_do_local(ac);
 446 }
 447
 448 /* Add the local record. */
 449 static int map_add_do_local(struct map_context *ac)
 450 {
 451         struct ldb_request *local_req;
 452         struct ldb_context *ldb;
 453         int ret;
 454
 455         ldb = ldb_module_get_ctx(ac->module);
 456
 457         /* Prepare the local operation */
 458         ret = ldb_build_add_req(&local_req, ldb, ac,
 459                                 ac->local_msg,
 460                                 ac->req->controls,
 461                                 ac,
 462                                 map_op_local_callback,
 463                                 ac->req);
 464         LDB_REQ_SET_LOCATION(local_req);
 465         if (ret != LDB_SUCCESS) {
 466                 return LDB_ERR_OPERATIONS_ERROR;
 467         }
 468         return ldb_next_request(ac->module, local_req);
 469 }
 470
 471 /*****************************************************************************
 472  * MODIFY operations
 473 *****************************************************************************/
 474
 475 /* Modify a record. */
 476 int ldb_map_modify(struct ldb_module *module, struct ldb_request *req)
 477 {
 478         const struct ldb_message *msg = req->op.mod.message;
 479         struct ldb_request *search_req = NULL;
 480         struct ldb_message *remote_msg;
 481         struct ldb_context *ldb;
 482         struct map_context *ac;
 483         int ret;
 484
 485         ldb = ldb_module_get_ctx(module);
 486
 487         /* Do not manipulate our control entries */
 488         if (ldb_dn_is_special(msg->dn)) {
 489                 return ldb_next_request(module, req);
 490         }
 491
 492         /* No mapping requested (perhaps no DN mapping specified), skip to next module */
 493         if (!ldb_dn_check_local(module, msg->dn)) {
 494                 return ldb_next_request(module, req);
 495         }
 496
 497         /* No mapping needed, skip to next module */
 498         /* TODO: What if the remote part exists, the local doesn't,
 499          *       and this request wants to modify local data and thus
 500          *       add the local record? */
 501         if (!ldb_msg_check_remote(module, msg)) {
 502                 return LDB_ERR_OPERATIONS_ERROR;
 503         }
 504
 505         /* Prepare context and handle */
 506         ac = map_init_context(module, req);
 507         if (ac == NULL) {
 508                 return LDB_ERR_OPERATIONS_ERROR;
 509         }
 510
 511         /* Prepare the local message */
 512         ac->local_msg = ldb_msg_new(ac);
 513         if (ac->local_msg == NULL) {
 514                 map_oom(module);
 515                 return LDB_ERR_OPERATIONS_ERROR;
 516         }
 517         ac->local_msg->dn = msg->dn;
 518
 519         /* Prepare the remote message */
 520         remote_msg = ldb_msg_new(ac->remote_req);
 521         if (remote_msg == NULL) {
 522                 map_oom(module);
 523                 return LDB_ERR_OPERATIONS_ERROR;
 524         }
 525         remote_msg->dn = ldb_dn_map_local(ac->module, remote_msg, msg->dn);
 526
 527         /* Split local from remote message */
 528         ldb_msg_partition(module, req->operation, ac->local_msg, remote_msg, msg);
 529
 530         /* Prepare the remote operation */
 531         ret = ldb_build_mod_req(&ac->remote_req, ldb,
 532                                 ac, remote_msg,
 533                                 req->controls,
 534                                 ac, map_op_remote_callback,
 535                                 req);
 536         LDB_REQ_SET_LOCATION(ac->remote_req);
 537         if (ret != LDB_SUCCESS) {
 538                 return LDB_ERR_OPERATIONS_ERROR;
 539         }
 540
 541         if ((ac->local_msg->num_elements == 0) ||
 542             ( ! map_check_local_db(ac->module))) {
 543                 /* No local data or db, just run the remote request */
 544                 return ldb_next_remote_request(ac->module, ac->remote_req);
 545         }
 546
 547         /* prepare the search operation */
 548         ret = map_search_self_req(&search_req, ac, msg->dn);
 549         if (ret != LDB_SUCCESS) {
 550                 return LDB_ERR_OPERATIONS_ERROR;
 551         }
 552
 553         return ldb_next_request(module, search_req);
 554 }
 555
 556 /* Modify the local record. */
 557 static int map_modify_do_local(struct map_context *ac)
 558 {
 559         struct ldb_request *local_req;
 560         struct ldb_context *ldb;
 561         int ret;
 562
 563         ldb = ldb_module_get_ctx(ac->module);
 564
 565         if (ac->local_dn == NULL) {
 566                 /* No local record present, add it instead */
 567                 /* Add local 'IS_MAPPED' */
 568                 /* TODO: use GUIDs here instead */
 569                 if (ldb_msg_add_empty(ac->local_msg, IS_MAPPED,
 570                                         LDB_FLAG_MOD_ADD, NULL) != 0) {
 571                         return LDB_ERR_OPERATIONS_ERROR;
 572                 }
 573                 ret = ldb_msg_add_linearized_dn(ac->local_msg, IS_MAPPED,
 574                                                 ac->remote_req->op.mod.message->dn);
 575                 if (ret != 0) {
 576                         return LDB_ERR_OPERATIONS_ERROR;
 577                 }
 578
 579                 /* Prepare the local operation */
 580                 ret = ldb_build_add_req(&local_req, ldb, ac,
 581                                         ac->local_msg,
 582                                         ac->req->controls,
 583                                         ac,
 584                                         map_op_local_callback,
 585                                         ac->req);
 586                 LDB_REQ_SET_LOCATION(local_req);
 587                 if (ret != LDB_SUCCESS) {
 588                         return LDB_ERR_OPERATIONS_ERROR;
 589                 }
 590         } else {
 591                 /* Prepare the local operation */
 592                 ret = ldb_build_mod_req(&local_req, ldb, ac,
 593                                         ac->local_msg,
 594                                         ac->req->controls,
 595                                         ac,
 596                                         map_op_local_callback,
 597                                         ac->req);
 598                 LDB_REQ_SET_LOCATION(local_req);
 599                 if (ret != LDB_SUCCESS) {
 600                         return LDB_ERR_OPERATIONS_ERROR;
 601                 }
 602         }
 603
 604         return ldb_next_request(ac->module, local_req);
 605 }
 606
 607 /*****************************************************************************
 608  * DELETE operations
 609 *****************************************************************************/
 610
 611 /* Delete a record. */
 612 int ldb_map_delete(struct ldb_module *module, struct ldb_request *req)
 613 {
 614         struct ldb_request *search_req;
 615         struct ldb_context *ldb;
 616         struct map_context *ac;
 617         int ret;
 618
 619         ldb = ldb_module_get_ctx(module);
 620
 621         /* Do not manipulate our control entries */
 622         if (ldb_dn_is_special(req->op.del.dn)) {
 623                 return ldb_next_request(module, req);
 624         }
 625
 626         /* No mapping requested (perhaps no DN mapping specified).
 627          * Skip to next module */
 628         if (!ldb_dn_check_local(module, req->op.del.dn)) {
 629                 return ldb_next_request(module, req);
 630         }
 631
 632         /* Prepare context and handle */
 633         ac = map_init_context(module, req);
 634         if (ac == NULL) {
 635                 return LDB_ERR_OPERATIONS_ERROR;
 636         }
 637
 638         /* Prepare the remote operation */
 639         ret = ldb_build_del_req(&ac->remote_req, ldb, ac,
 640                                    ldb_dn_map_local(module, ac, req->op.del.dn),
 641                                    req->controls,
 642                                    ac,
 643                                    map_op_remote_callback,
 644                                    req);
 645         LDB_REQ_SET_LOCATION(ac->remote_req);
 646         if (ret != LDB_SUCCESS) {
 647                 return LDB_ERR_OPERATIONS_ERROR;
 648         }
 649
 650         /* No local db, just run the remote request */
 651         if (!map_check_local_db(ac->module)) {
 652                 /* Do the remote request. */
 653                 return ldb_next_remote_request(ac->module, ac->remote_req);
 654         }
 655
 656         /* Prepare the search operation */
 657         ret = map_search_self_req(&search_req, ac, req->op.del.dn);
 658         if (ret != LDB_SUCCESS) {
 659                 map_oom(module);
 660                 return LDB_ERR_OPERATIONS_ERROR;
 661         }
 662
 663         return ldb_next_request(module, search_req);
 664 }
 665
 666 /* Delete the local record. */
 667 static int map_delete_do_local(struct map_context *ac)
 668 {
 669         struct ldb_request *local_req;
 670         struct ldb_context *ldb;
 671         int ret;
 672
 673         ldb = ldb_module_get_ctx(ac->module);
 674
 675         /* No local record, continue remotely */
 676         if (ac->local_dn == NULL) {
 677                 /* Do the remote request. */
 678                 return ldb_next_remote_request(ac->module, ac->remote_req);
 679         }
 680
 681         /* Prepare the local operation */
 682         ret = ldb_build_del_req(&local_req, ldb, ac,
 683                                    ac->req->op.del.dn,
 684                                    ac->req->controls,
 685                                    ac,
 686                                    map_op_local_callback,
 687                                    ac->req);
 688         LDB_REQ_SET_LOCATION(local_req);
 689         if (ret != LDB_SUCCESS) {
 690                 return LDB_ERR_OPERATIONS_ERROR;
 691         }
 692         return ldb_next_request(ac->module, local_req);
 693 }
 694
 695 /*****************************************************************************
 696  * RENAME operations
 697 *****************************************************************************/
 698
 699 /* Rename a record. */
 700 int ldb_map_rename(struct ldb_module *module, struct ldb_request *req)
 701 {
 702         struct ldb_request *search_req = NULL;
 703         struct ldb_context *ldb;
 704         struct map_context *ac;
 705         int ret;
 706
 707         ldb = ldb_module_get_ctx(module);
 708
 709         /* Do not manipulate our control entries */
 710         if (ldb_dn_is_special(req->op.rename.olddn)) {
 711                 return ldb_next_request(module, req);
 712         }
 713
 714         /* No mapping requested (perhaps no DN mapping specified).
 715          * Skip to next module */
 716         if ((!ldb_dn_check_local(module, req->op.rename.olddn)) &&
 717             (!ldb_dn_check_local(module, req->op.rename.newdn))) {
 718                 return ldb_next_request(module, req);
 719         }
 720
 721         /* Rename into/out of the mapped partition requested, bail out */
 722         if (!ldb_dn_check_local(module, req->op.rename.olddn) ||
 723             !ldb_dn_check_local(module, req->op.rename.newdn)) {
 724                 return LDB_ERR_AFFECTS_MULTIPLE_DSAS;
 725         }
 726
 727         /* Prepare context and handle */
 728         ac = map_init_context(module, req);
 729         if (ac == NULL) {
 730                 return LDB_ERR_OPERATIONS_ERROR;
 731         }
 732
 733         /* Prepare the remote operation */
 734         ret = ldb_build_rename_req(&ac->remote_req, ldb, ac,
 735                                    ldb_dn_map_local(module, ac, req->op.rename.olddn),
 736                                    ldb_dn_map_local(module, ac, req->op.rename.newdn),
 737                                    req->controls,
 738                                    ac, map_op_remote_callback,
 739                                    req);
 740         LDB_REQ_SET_LOCATION(ac->remote_req);
 741         if (ret != LDB_SUCCESS) {
 742                 return LDB_ERR_OPERATIONS_ERROR;
 743         }
 744
 745         /* No local db, just run the remote request */
 746         if (!map_check_local_db(ac->module)) {
 747                 /* Do the remote request. */
 748                 return ldb_next_remote_request(ac->module, ac->remote_req);
 749         }
 750
 751         /* Prepare the search operation */
 752         ret = map_search_self_req(&search_req, ac, req->op.rename.olddn);
 753         if (ret != LDB_SUCCESS) {
 754                 map_oom(module);
 755                 return LDB_ERR_OPERATIONS_ERROR;
 756         }
 757
 758         return ldb_next_request(module, search_req);
 759 }
 760
 761 /* Rename the local record. */
 762 static int map_rename_do_local(struct map_context *ac)
 763 {
 764         struct ldb_request *local_req;
 765         struct ldb_context *ldb;
 766         int ret;
 767
 768         ldb = ldb_module_get_ctx(ac->module);
 769
 770         /* No local record, continue remotely */
 771         if (ac->local_dn == NULL) {
 772                 /* Do the remote request. */
 773                 return ldb_next_remote_request(ac->module, ac->remote_req);
 774         }
 775
 776         /* Prepare the local operation */
 777         ret = ldb_build_rename_req(&local_req, ldb, ac,
 778                                    ac->req->op.rename.olddn,
 779                                    ac->req->op.rename.newdn,
 780                                    ac->req->controls,
 781                                    ac,
 782                                    map_rename_local_callback,
 783                                    ac->req);
 784         LDB_REQ_SET_LOCATION(local_req);
 785         if (ret != LDB_SUCCESS) {
 786                 return LDB_ERR_OPERATIONS_ERROR;
 787         }
 788
 789         return ldb_next_request(ac->module, local_req);
 790 }
 791
 792 static int map_rename_local_callback(struct ldb_request *req,
 793                                      struct ldb_reply *ares)
 794 {
 795         struct ldb_context *ldb;
 796         struct map_context *ac;
 797         int ret;
 798
 799         ac = talloc_get_type(req->context, struct map_context);
 800         ldb = ldb_module_get_ctx(ac->module);
 801
 802         if (!ares) {
 803                 return ldb_module_done(ac->req, NULL, NULL,
 804                                         LDB_ERR_OPERATIONS_ERROR);
 805         }
 806         if (ares->error != LDB_SUCCESS) {
 807                 return ldb_module_done(ac->req, ares->controls,
 808                                         ares->response, ares->error);
 809         }
 810
 811         if (ares->type != LDB_REPLY_DONE) {
 812                 ldb_asprintf_errstring(ldb, "Invalid LDB reply type %d", ares->type);
 813                 return ldb_module_done(ac->req, NULL, NULL,
 814                                         LDB_ERR_OPERATIONS_ERROR);
 815         }
 816
 817         /* proceed with next step */
 818         ret = map_rename_do_fixup(ac);
 819         if (ret != LDB_SUCCESS) {
 820                 return ldb_module_done(ac->req, NULL, NULL,
 821                                         LDB_ERR_OPERATIONS_ERROR);
 822         }
 823
 824         return LDB_SUCCESS;
 825 }
 826
 827 /* Update the local 'IS_MAPPED' attribute. */
 828 static int map_rename_do_fixup(struct map_context *ac)
 829 {
 830         struct ldb_request *local_req;
 831
 832         /* Prepare the fixup operation */
 833         /* TODO: use GUIDs here instead -- or skip it when GUIDs are used. */
 834         local_req = map_build_fixup_req(ac,
 835                                         ac->req->op.rename.newdn,
 836                                         ac->remote_req->op.rename.newdn,
 837                                         ac,
 838                                         map_op_local_callback);
 839         if (local_req == NULL) {
 840                 return LDB_ERR_OPERATIONS_ERROR;
 841         }
 842
 843         return ldb_next_request(ac->module, local_req);
 844 }