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
  91                 FALL_THROUGH;
  92         case LDB_MAP_IGNORE:
  93                 goto local;
  94
  95         case LDB_MAP_CONVERT:
  96                 if (map->u.convert.convert_local == NULL) {
  97                         ldb_debug(ldb, LDB_DEBUG_WARNING, "ldb_map: "
  98                                   "Not mapping attribute '%s': "
  99                                   "'convert_local' not set",
 100                                   map->local_name);
 101                         goto local;
 102                 }
 103
 104                 FALL_THROUGH;
 105         case LDB_MAP_KEEP:
 106         case LDB_MAP_RENAME:
 107                 el = ldb_msg_el_map_local(module, remote, map, old);
 108                 break;
 109
 110         case LDB_MAP_GENERATE:
 111                 if (map->u.generate.generate_remote == NULL) {
 112                         ldb_debug(ldb, LDB_DEBUG_WARNING, "ldb_map: "
 113                                   "Not mapping attribute '%s': "
 114                                   "'generate_remote' not set",
 115                                   map->local_name);
 116                         goto local;
 117                 }
 118
 119                 /* TODO: if this attr requires context:
 120                  *       make sure all context attrs are mappable (in 'names')
 121                  *       make sure all context attrs have already been mapped?
 122                  *       maybe postpone generation until they have been mapped?
 123                  */
 124
 125                 map->u.generate.generate_remote(module, map->local_name, msg, remote, local);
 126                 return 0;
 127         }
 128
 129         if (el == NULL) {
 130                 return -1;
 131         }
 132
 133         return ldb_msg_add(remote, el, old->flags);
 134
 135 local:
 136         el = talloc(local, struct ldb_message_element);
 137         if (el == NULL) {
 138                 map_oom(module);
 139                 return -1;
 140         }
 141
 142         *el = *old;                     /* copy the old element */
 143
 144         return ldb_msg_add(local, el, old->flags);
 145 }
 146
 147 /* Mapping messages
 148  * ================ */
 149
 150 /* Check whether a message will be (partially) mapped into the remote partition. */
 151 static bool ldb_msg_check_remote(struct ldb_module *module, const struct ldb_message *msg)
 152 {
 153         const struct ldb_map_context *data = map_get_context(module);
 154         bool ret;
 155         unsigned int i;
 156
 157         for (i = 0; i < msg->num_elements; i++) {
 158                 ret = map_attr_check_remote(data, msg->elements[i].name);
 159                 if (ret) {
 160                         return ret;
 161                 }
 162         }
 163
 164         return false;
 165 }
 166
 167 /* Split message elements that stay in the local partition from those
 168  * that are mapped into the remote partition. */
 169 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)
 170 {
 171         /* const char * const names[]; */
 172         struct ldb_context *ldb;
 173         unsigned int i;
 174         int ret;
 175
 176         ldb = ldb_module_get_ctx(module);
 177
 178         for (i = 0; i < msg->num_elements; i++) {
 179                 /* Skip 'IS_MAPPED' */
 180                 if (ldb_attr_cmp(msg->elements[i].name, IS_MAPPED) == 0) {
 181                         ldb_debug(ldb, LDB_DEBUG_WARNING, "ldb_map: "
 182                                   "Skipping attribute '%s'",
 183                                   msg->elements[i].name);
 184                         continue;
 185                 }
 186
 187                 ret = ldb_msg_el_partition(module, optype, local, remote, msg, msg->elements[i].name, &msg->elements[i]);
 188                 if (ret) {
 189                         return ret;
 190                 }
 191         }
 192
 193         return 0;
 194 }
 195
 196
 197 static int map_add_do_local(struct map_context *ac);
 198 static int map_modify_do_local(struct map_context *ac);
 199 static int map_delete_do_local(struct map_context *ac);
 200 static int map_rename_do_local(struct map_context *ac);
 201 static int map_rename_do_fixup(struct map_context *ac);
 202 static int map_rename_local_callback(struct ldb_request *req,
 203                                      struct ldb_reply *ares);
 204
 205
 206 /*****************************************************************************
 207  * COMMON INBOUND functions
 208 *****************************************************************************/
 209
 210 /* Store the DN of a single search result in context. */
 211 static int map_search_self_callback(struct ldb_request *req, struct ldb_reply *ares)
 212 {
 213         struct ldb_context *ldb;
 214         struct map_context *ac;
 215         int ret;
 216
 217         ac = talloc_get_type(req->context, struct map_context);
 218         ldb = ldb_module_get_ctx(ac->module);
 219
 220         if (!ares) {
 221                 return ldb_module_done(ac->req, NULL, NULL,
 222                                         LDB_ERR_OPERATIONS_ERROR);
 223         }
 224         if (ares->error != LDB_SUCCESS) {
 225                 return ldb_module_done(ac->req, ares->controls,
 226                                         ares->response, ares->error);
 227         }
 228
 229         /* We are interested only in the single reply */
 230         switch(ares->type) {
 231         case LDB_REPLY_ENTRY:
 232                 /* We have already found a remote DN */
 233                 if (ac->local_dn) {
 234                         ldb_set_errstring(ldb,
 235                                           "Too many results!");
 236                         return ldb_module_done(ac->req, NULL, NULL,
 237                                                 LDB_ERR_OPERATIONS_ERROR);
 238                 }
 239
 240                 /* Store local DN */
 241                 ac->local_dn = talloc_steal(ac, ares->message->dn);
 242                 break;
 243
 244         case LDB_REPLY_DONE:
 245
 246                 switch (ac->req->operation) {
 247                 case LDB_MODIFY:
 248                         ret = map_modify_do_local(ac);
 249                         break;
 250                 case LDB_DELETE:
 251                         ret = map_delete_do_local(ac);
 252                         break;
 253                 case LDB_RENAME:
 254                         ret = map_rename_do_local(ac);
 255                         break;
 256                 default:
 257                         /* if we get here we have definitely a problem */
 258                         ret = LDB_ERR_OPERATIONS_ERROR;
 259                 }
 260                 if (ret != LDB_SUCCESS) {
 261                         return ldb_module_done(ac->req, NULL, NULL,
 262                                                 LDB_ERR_OPERATIONS_ERROR);
 263                 }
 264
 265                 break;
 266         default:
 267                 /* ignore referrals */
 268                 break;
 269         }
 270
 271         talloc_free(ares);
 272         return LDB_SUCCESS;
 273 }
 274
 275 /* Build a request to search the local record by its DN. */
 276 static int map_search_self_req(struct ldb_request **req,
 277                                 struct map_context *ac,
 278                                 struct ldb_dn *dn)
 279 {
 280         /* attrs[] is returned from this function in
 281          * ac->search_req->op.search.attrs, so it must be static, as
 282          * otherwise the compiler can put it on the stack */
 283         static const char * const attrs[] = { IS_MAPPED, NULL };
 284         struct ldb_parse_tree *tree;
 285
 286         /* Limit search to records with 'IS_MAPPED' present */
 287         tree = ldb_parse_tree(ac, "(" IS_MAPPED "=*)");
 288         if (tree == NULL) {
 289                 map_oom(ac->module);
 290                 return LDB_ERR_OPERATIONS_ERROR;
 291         }
 292
 293         *req = map_search_base_req(ac, dn, attrs, tree,
 294                                    ac, map_search_self_callback);
 295         if (*req == NULL) {
 296                 return LDB_ERR_OPERATIONS_ERROR;
 297         }
 298
 299         return LDB_SUCCESS;
 300 }
 301
 302 static int map_op_local_callback(struct ldb_request *req,
 303                                  struct ldb_reply *ares)
 304 {
 305         struct ldb_context *ldb;
 306         struct map_context *ac;
 307         int ret;
 308
 309         ac = talloc_get_type(req->context, struct map_context);
 310         ldb = ldb_module_get_ctx(ac->module);
 311
 312         if (!ares) {
 313                 return ldb_module_done(ac->req, NULL, NULL,
 314                                         LDB_ERR_OPERATIONS_ERROR);
 315         }
 316         if (ares->error != LDB_SUCCESS) {
 317                 return ldb_module_done(ac->req, ares->controls,
 318                                         ares->response, ares->error);
 319         }
 320
 321         if (ares->type != LDB_REPLY_DONE) {
 322                 ldb_asprintf_errstring(ldb, "Invalid LDB reply type %d", ares->type);
 323                 return ldb_module_done(ac->req, NULL, NULL,
 324                                         LDB_ERR_OPERATIONS_ERROR);
 325         }
 326
 327         /* Do the remote request. */
 328         ret = ldb_next_remote_request(ac->module, ac->remote_req);
 329         if (ret != LDB_SUCCESS) {
 330                 return ldb_module_done(ac->req, NULL, NULL,
 331                                         LDB_ERR_OPERATIONS_ERROR);
 332         }
 333
 334         return LDB_SUCCESS;
 335 }
 336
 337 static int map_op_remote_callback(struct ldb_request *req,
 338                                   struct ldb_reply *ares)
 339 {
 340         struct ldb_context *ldb;
 341         struct map_context *ac;
 342
 343         ac = talloc_get_type(req->context, struct map_context);
 344         ldb = ldb_module_get_ctx(ac->module);
 345
 346         if (!ares) {
 347                 return ldb_module_done(ac->req, NULL, NULL,
 348                                         LDB_ERR_OPERATIONS_ERROR);
 349         }
 350         if (ares->error != LDB_SUCCESS) {
 351                 return ldb_module_done(ac->req, ares->controls,
 352                                         ares->response, ares->error);
 353         }
 354
 355         if (ares->type != LDB_REPLY_DONE) {
 356                 ldb_asprintf_errstring(ldb, "Invalid LDB reply type %d", ares->type);
 357                 return ldb_module_done(ac->req, NULL, NULL,
 358                                         LDB_ERR_OPERATIONS_ERROR);
 359         }
 360
 361         return ldb_module_done(ac->req, ares->controls,
 362                                         ares->response, ares->error);
 363 }
 364
 365
 366 /*****************************************************************************
 367  * ADD operations
 368 *****************************************************************************/
 369
 370
 371 /* Add a record. */
 372 int ldb_map_add(struct ldb_module *module, struct ldb_request *req)
 373 {
 374         const struct ldb_message *msg = req->op.add.message;
 375         struct ldb_context *ldb;
 376         struct map_context *ac;
 377         struct ldb_message *remote_msg;
 378         int ret;
 379
 380         ldb = ldb_module_get_ctx(module);
 381
 382         /* Do not manipulate our control entries */
 383         if (ldb_dn_is_special(msg->dn)) {
 384                 return ldb_next_request(module, req);
 385         }
 386
 387         /* No mapping requested (perhaps no DN mapping specified), skip to next module */
 388         if (!ldb_dn_check_local(module, msg->dn)) {
 389                 return ldb_next_request(module, req);
 390         }
 391
 392         /* No mapping needed, fail */
 393         if (!ldb_msg_check_remote(module, msg)) {
 394                 return LDB_ERR_OPERATIONS_ERROR;
 395         }
 396
 397         /* Prepare context and handle */
 398         ac = map_init_context(module, req);
 399         if (ac == NULL) {
 400                 return LDB_ERR_OPERATIONS_ERROR;
 401         }
 402
 403
 404         /* Prepare the local message */
 405         ac->local_msg = ldb_msg_new(ac);
 406         if (ac->local_msg == NULL) {
 407                 map_oom(module);
 408                 return LDB_ERR_OPERATIONS_ERROR;
 409         }
 410         ac->local_msg->dn = msg->dn;
 411
 412         /* Prepare the remote message */
 413         remote_msg = ldb_msg_new(ac);
 414         if (remote_msg == NULL) {
 415                 map_oom(module);
 416                 return LDB_ERR_OPERATIONS_ERROR;
 417         }
 418         remote_msg->dn = ldb_dn_map_local(ac->module, remote_msg, msg->dn);
 419
 420         /* Split local from remote message */
 421         ldb_msg_partition(module, req->operation, ac->local_msg, remote_msg, msg);
 422
 423         /* Prepare the remote operation */
 424         ret = ldb_build_add_req(&ac->remote_req, ldb,
 425                                 ac, remote_msg,
 426                                 req->controls,
 427                                 ac, map_op_remote_callback,
 428                                 req);
 429         LDB_REQ_SET_LOCATION(ac->remote_req);
 430         if (ret != LDB_SUCCESS) {
 431                 return LDB_ERR_OPERATIONS_ERROR;
 432         }
 433
 434         if ((ac->local_msg->num_elements == 0) ||
 435             ( ! map_check_local_db(ac->module))) {
 436                 /* No local data or db, just run the remote request */
 437                 return ldb_next_remote_request(ac->module, ac->remote_req);
 438         }
 439
 440         /* Store remote DN in 'IS_MAPPED' */
 441         /* TODO: use GUIDs here instead */
 442         ret = ldb_msg_add_linearized_dn(ac->local_msg, IS_MAPPED,
 443                                         remote_msg->dn);
 444         if (ret != LDB_SUCCESS) {
 445                 return LDB_ERR_OPERATIONS_ERROR;
 446         }
 447
 448         return map_add_do_local(ac);
 449 }
 450
 451 /* Add the local record. */
 452 static int map_add_do_local(struct map_context *ac)
 453 {
 454         struct ldb_request *local_req;
 455         struct ldb_context *ldb;
 456         int ret;
 457
 458         ldb = ldb_module_get_ctx(ac->module);
 459
 460         /* Prepare the local operation */
 461         ret = ldb_build_add_req(&local_req, ldb, ac,
 462                                 ac->local_msg,
 463                                 ac->req->controls,
 464                                 ac,
 465                                 map_op_local_callback,
 466                                 ac->req);
 467         LDB_REQ_SET_LOCATION(local_req);
 468         if (ret != LDB_SUCCESS) {
 469                 return LDB_ERR_OPERATIONS_ERROR;
 470         }
 471         return ldb_next_request(ac->module, local_req);
 472 }
 473
 474 /*****************************************************************************
 475  * MODIFY operations
 476 *****************************************************************************/
 477
 478 /* Modify a record. */
 479 int ldb_map_modify(struct ldb_module *module, struct ldb_request *req)
 480 {
 481         const struct ldb_message *msg = req->op.mod.message;
 482         struct ldb_request *search_req = NULL;
 483         struct ldb_message *remote_msg;
 484         struct ldb_context *ldb;
 485         struct map_context *ac;
 486         int ret;
 487
 488         ldb = ldb_module_get_ctx(module);
 489
 490         /* Do not manipulate our control entries */
 491         if (ldb_dn_is_special(msg->dn)) {
 492                 return ldb_next_request(module, req);
 493         }
 494
 495         /* No mapping requested (perhaps no DN mapping specified), skip to next module */
 496         if (!ldb_dn_check_local(module, msg->dn)) {
 497                 return ldb_next_request(module, req);
 498         }
 499
 500         /* No mapping needed, skip to next module */
 501         /* TODO: What if the remote part exists, the local doesn't,
 502          *       and this request wants to modify local data and thus
 503          *       add the local record? */
 504         if (!ldb_msg_check_remote(module, msg)) {
 505                 return LDB_ERR_OPERATIONS_ERROR;
 506         }
 507
 508         /* Prepare context and handle */
 509         ac = map_init_context(module, req);
 510         if (ac == NULL) {
 511                 return LDB_ERR_OPERATIONS_ERROR;
 512         }
 513
 514         /* Prepare the local message */
 515         ac->local_msg = ldb_msg_new(ac);
 516         if (ac->local_msg == NULL) {
 517                 map_oom(module);
 518                 return LDB_ERR_OPERATIONS_ERROR;
 519         }
 520         ac->local_msg->dn = msg->dn;
 521
 522         /* Prepare the remote message */
 523         remote_msg = ldb_msg_new(ac->remote_req);
 524         if (remote_msg == NULL) {
 525                 map_oom(module);
 526                 return LDB_ERR_OPERATIONS_ERROR;
 527         }
 528         remote_msg->dn = ldb_dn_map_local(ac->module, remote_msg, msg->dn);
 529
 530         /* Split local from remote message */
 531         ldb_msg_partition(module, req->operation, ac->local_msg, remote_msg, msg);
 532
 533         /* Prepare the remote operation */
 534         ret = ldb_build_mod_req(&ac->remote_req, ldb,
 535                                 ac, remote_msg,
 536                                 req->controls,
 537                                 ac, map_op_remote_callback,
 538                                 req);
 539         LDB_REQ_SET_LOCATION(ac->remote_req);
 540         if (ret != LDB_SUCCESS) {
 541                 return LDB_ERR_OPERATIONS_ERROR;
 542         }
 543
 544         if ((ac->local_msg->num_elements == 0) ||
 545             ( ! map_check_local_db(ac->module))) {
 546                 /* No local data or db, just run the remote request */
 547                 return ldb_next_remote_request(ac->module, ac->remote_req);
 548         }
 549
 550         /* prepare the search operation */
 551         ret = map_search_self_req(&search_req, ac, msg->dn);
 552         if (ret != LDB_SUCCESS) {
 553                 return LDB_ERR_OPERATIONS_ERROR;
 554         }
 555
 556         return ldb_next_request(module, search_req);
 557 }
 558
 559 /* Modify the local record. */
 560 static int map_modify_do_local(struct map_context *ac)
 561 {
 562         struct ldb_request *local_req;
 563         struct ldb_context *ldb;
 564         int ret;
 565
 566         ldb = ldb_module_get_ctx(ac->module);
 567
 568         if (ac->local_dn == NULL) {
 569                 /* No local record present, add it instead */
 570                 /* Add local 'IS_MAPPED' */
 571                 /* TODO: use GUIDs here instead */
 572                 ret = ldb_msg_append_linearized_dn(ac->local_msg, IS_MAPPED,
 573                                                    ac->remote_req->op.mod.message->dn,
 574                                                    LDB_FLAG_MOD_ADD);
 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 }