git.sur5r.net Git - openldap/blob - servers/slapd/back-bdb/delete.c

   1 /* delete.c - bdb backend delete routine */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7
   8 #include "portable.h"
   9
  10 #include <stdio.h>
  11 #include <ac/string.h>
  12
  13 #include "back-bdb.h"
  14 #include "external.h"
  15
  16 int
  17 bdb_delete(
  18         BackendDB       *be,
  19         Connection      *conn,
  20         Operation       *op,
  21         struct berval   *dn,
  22         struct berval   *ndn
  23 )
  24 {
  25         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
  26         Entry   *matched;
  27         struct berval   pdn = {0, NULL};
  28         Entry   *e = NULL;
  29         Entry   *p = NULL;
  30         int     rc;
  31         const char *text;
  32         int             manageDSAit = get_manageDSAit( op );
  33         AttributeDescription *children = slap_schema.si_ad_children;
  34         AttributeDescription *entry = slap_schema.si_ad_entry;
  35         DB_TXN          *ltid = NULL;
  36         struct bdb_op_info opinfo;
  37
  38         u_int32_t       locker = 0;
  39         DB_LOCK         lock;
  40 #if 0
  41         u_int32_t       lockid;
  42         DB_LOCK         lock;
  43 #endif
  44
  45         int             noop = 0;
  46
  47 #if defined(LDAP_CLIENT_UPDATE) || defined(LDAP_SYNC)
  48         Operation* ps_list;
  49 #endif
  50
  51 #ifdef NEW_LOGGING
  52         LDAP_LOG ( OPERATION, ARGS,  "==> bdb_delete: %s\n", dn->bv_val, 0, 0 );
  53 #else
  54         Debug( LDAP_DEBUG_ARGS, "==> bdb_delete: %s\n",
  55                 dn->bv_val, 0, 0 );
  56 #endif
  57
  58         if( 0 ) {
  59 retry:  /* transaction retry */
  60                 if( e != NULL ) {
  61                         bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e);
  62                 }
  63 #ifdef NEW_LOGGING
  64                 LDAP_LOG ( OPERATION, DETAIL1,
  65                         "==> bdb_delete: retrying...\n", 0, 0, 0 );
  66 #else
  67                 Debug( LDAP_DEBUG_TRACE, "==> bdb_delete: retrying...\n",
  68                         0, 0, 0 );
  69 #endif
  70                 rc = TXN_ABORT( ltid );
  71                 ltid = NULL;
  72                 op->o_private = NULL;
  73                 if( rc != 0 ) {
  74                         rc = LDAP_OTHER;
  75                         text = "internal error";
  76                         goto return_results;
  77                 }
  78                 ldap_pvt_thread_yield();
  79         }
  80
  81         /* begin transaction */
  82         rc = TXN_BEGIN( bdb->bi_dbenv, NULL, &ltid,
  83                 bdb->bi_db_opflags );
  84         text = NULL;
  85         if( rc != 0 ) {
  86 #ifdef NEW_LOGGING
  87                 LDAP_LOG ( OPERATION, ERR,
  88                         "==> bdb_delete: txn_begin failed: %s (%d)\n",
  89                         db_strerror(rc), rc, 0 );
  90 #else
  91                 Debug( LDAP_DEBUG_TRACE,
  92                         "bdb_delete: txn_begin failed: %s (%d)\n",
  93                         db_strerror(rc), rc, 0 );
  94 #endif
  95                 rc = LDAP_OTHER;
  96                 text = "internal error";
  97                 goto return_results;
  98         }
  99
 100         locker = TXN_ID ( ltid );
 101 #if 0
 102         lockid = TXN_ID( ltid );
 103 #endif
 104
 105         opinfo.boi_bdb = be;
 106         opinfo.boi_txn = ltid;
 107         opinfo.boi_locker = locker;
 108         opinfo.boi_err = 0;
 109         op->o_private = &opinfo;
 110
 111         if ( !be_issuffix( be, ndn ) ) {
 112                 dnParent( ndn, &pdn );
 113         }
 114
 115         if( pdn.bv_len != 0 ) {
 116 #if 0
 117                 if ( ltid ) {
 118                         DBT obj;
 119                         obj.data = pdn.bv_val-1;
 120                         obj.size = pdn.bv_len+1;
 121                         rc = LOCK_GET( bdb->bi_dbenv, lockid, 0, &obj,
 122                                 DB_LOCK_WRITE, &lock);
 123                 }
 124 #endif
 125                 /* get parent */
 126                 rc = bdb_dn2entry_r( be, ltid, &pdn, &p, NULL, 0, locker, &lock );
 127
 128                 switch( rc ) {
 129                 case 0:
 130                 case DB_NOTFOUND:
 131                         break;
 132                 case DB_LOCK_DEADLOCK:
 133                 case DB_LOCK_NOTGRANTED:
 134                         goto retry;
 135                 case LDAP_BUSY:
 136                         text = "ldap server busy";
 137                         goto return_results;
 138                 default:
 139                         rc = LDAP_OTHER;
 140                         text = "internal error";
 141                         goto return_results;
 142                 }
 143
 144                 if( p == NULL) {
 145 #ifdef NEW_LOGGING
 146                         LDAP_LOG ( OPERATION, DETAIL1,
 147                                 "<=- bdb_delete: parent does not exist\n", 0, 0, 0 );
 148 #else
 149                         Debug( LDAP_DEBUG_TRACE,
 150                                 "<=- bdb_delete: parent does not exist\n",
 151                                 0, 0, 0);
 152 #endif
 153                         rc = LDAP_OTHER;
 154                         text = "could not locate parent of entry";
 155                         goto return_results;
 156                 }
 157
 158                 /* check parent for "children" acl */
 159                 rc = access_allowed( be, conn, op, p,
 160                         children, NULL, ACL_WRITE, NULL );
 161
 162                 bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p);
 163                 p = NULL;
 164
 165                 switch( opinfo.boi_err ) {
 166                 case DB_LOCK_DEADLOCK:
 167                 case DB_LOCK_NOTGRANTED:
 168                         goto retry;
 169                 }
 170
 171                 if ( !rc  ) {
 172 #ifdef NEW_LOGGING
 173                         LDAP_LOG ( OPERATION, DETAIL1,
 174                                 "<=- bdb_delete: no write access to parent\n", 0, 0, 0 );
 175 #else
 176                         Debug( LDAP_DEBUG_TRACE,
 177                                 "<=- bdb_delete: no write access to parent\n",
 178                                 0, 0, 0 );
 179 #endif
 180                         rc = LDAP_INSUFFICIENT_ACCESS;
 181                         text = "no write access to parent";
 182                         goto return_results;
 183                 }
 184
 185         } else {
 186                 /* no parent, must be root to delete */
 187                 if( ! be_isroot( be, &op->o_ndn ) ) {
 188                         if ( be_issuffix( be, (struct berval *)&slap_empty_bv )
 189                                 || be_isupdate( be, &op->o_ndn ) ) {
 190                                 p = (Entry *)&slap_entry_root;
 191
 192                                 /* check parent for "children" acl */
 193                                 rc = access_allowed( be, conn, op, p,
 194                                         children, NULL, ACL_WRITE, NULL );
 195
 196                                 p = NULL;
 197
 198                                 switch( opinfo.boi_err ) {
 199                                 case DB_LOCK_DEADLOCK:
 200                                 case DB_LOCK_NOTGRANTED:
 201                                         goto retry;
 202                                 }
 203
 204                                 if ( !rc  ) {
 205 #ifdef NEW_LOGGING
 206                                         LDAP_LOG ( OPERATION, DETAIL1,
 207                                                 "<=- bdb_delete: no access to parent\n", 0, 0, 0 );
 208 #else
 209                                         Debug( LDAP_DEBUG_TRACE,
 210                                                 "<=- bdb_delete: no access "
 211                                                 "to parent\n", 0, 0, 0 );
 212 #endif
 213                                         rc = LDAP_INSUFFICIENT_ACCESS;
 214                                         text = "no write access to parent";
 215                                         goto return_results;
 216                                 }
 217
 218                         } else {
 219 #ifdef NEW_LOGGING
 220                                 LDAP_LOG ( OPERATION, DETAIL1,
 221                                         "<=- bdb_delete: no parent and not root\n", 0, 0, 0 );
 222 #else
 223                                 Debug( LDAP_DEBUG_TRACE,
 224                                         "<=- bdb_delete: no parent "
 225                                         "and not root\n", 0, 0, 0);
 226 #endif
 227                                 rc = LDAP_INSUFFICIENT_ACCESS;
 228                                 goto return_results;
 229                         }
 230                 }
 231
 232 #if 0
 233                 if ( ltid ) {
 234                         DBT obj;
 235                         obj.data = ",";
 236                         obj.size = 1;
 237                         rc = LOCK_GET( bdb->bi_dbenv, lockid, 0, &obj,
 238                                 DB_LOCK_WRITE, &lock);
 239                 }
 240 #endif
 241         }
 242
 243         /* get entry for read/modify/write */
 244         rc = bdb_dn2entry_w( be, ltid, ndn, &e, &matched, DB_RMW, locker, &lock );
 245
 246         switch( rc ) {
 247         case 0:
 248         case DB_NOTFOUND:
 249                 break;
 250         case DB_LOCK_DEADLOCK:
 251         case DB_LOCK_NOTGRANTED:
 252                 goto retry;
 253         case LDAP_BUSY:
 254                 text = "ldap server busy";
 255                 goto return_results;
 256         default:
 257                 rc = LDAP_OTHER;
 258                 text = "internal error";
 259                 goto return_results;
 260         }
 261
 262         if ( e == NULL ) {
 263                 char *matched_dn = NULL;
 264                 BerVarray refs;
 265
 266 #ifdef NEW_LOGGING
 267                 LDAP_LOG ( OPERATION, ARGS,
 268                         "<=- bdb_delete: no such object %s\n", dn->bv_val, 0, 0);
 269 #else
 270                 Debug( LDAP_DEBUG_ARGS,
 271                         "<=- bdb_delete: no such object %s\n",
 272                         dn->bv_val, 0, 0);
 273 #endif
 274
 275                 if ( matched != NULL ) {
 276                         matched_dn = ch_strdup( matched->e_dn );
 277                         refs = is_entry_referral( matched )
 278                                 ? get_entry_referrals( be, conn, op, matched )
 279                                 : NULL;
 280                         bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, matched);
 281                         matched = NULL;
 282
 283                 } else {
 284                         refs = referral_rewrite( default_referral,
 285                                 NULL, dn, LDAP_SCOPE_DEFAULT );
 286                 }
 287
 288                 send_ldap_result( conn, op, LDAP_REFERRAL,
 289                         matched_dn, NULL, refs, NULL );
 290
 291                 ber_bvarray_free( refs );
 292                 free( matched_dn );
 293
 294                 rc = -1;
 295                 goto done;
 296         }
 297
 298         rc = access_allowed( be, conn, op, e,
 299                 entry, NULL, ACL_WRITE, NULL );
 300
 301         switch( opinfo.boi_err ) {
 302         case DB_LOCK_DEADLOCK:
 303         case DB_LOCK_NOTGRANTED:
 304                 goto retry;
 305         }
 306
 307         if ( !rc  ) {
 308 #ifdef NEW_LOGGING
 309                 LDAP_LOG ( OPERATION, DETAIL1,
 310                         "<=- bdb_delete: no write access to entry\n", 0, 0, 0 );
 311 #else
 312                 Debug( LDAP_DEBUG_TRACE,
 313                         "<=- bdb_delete: no write access to entry\n",
 314                         0, 0, 0 );
 315 #endif
 316                 rc = LDAP_INSUFFICIENT_ACCESS;
 317                 text = "no write access to entry";
 318                 goto return_results;
 319         }
 320
 321         if ( !manageDSAit && is_entry_referral( e ) ) {
 322                 /* entry is a referral, don't allow delete */
 323                 BerVarray refs = get_entry_referrals( be,
 324                         conn, op, e );
 325
 326 #ifdef NEW_LOGGING
 327                 LDAP_LOG ( OPERATION, DETAIL1,
 328                         "<=- bdb_delete: entry is referral\n", 0, 0, 0 );
 329 #else
 330                 Debug( LDAP_DEBUG_TRACE,
 331                         "bdb_delete: entry is referral\n",
 332                         0, 0, 0 );
 333 #endif
 334
 335                 send_ldap_result( conn, op, LDAP_REFERRAL,
 336                         e->e_dn, NULL, refs, NULL );
 337
 338                 ber_bvarray_free( refs );
 339
 340                 rc = 1;
 341                 goto done;
 342         }
 343
 344         rc = bdb_dn2id_children( be, ltid, &e->e_nname, 0 );
 345         if( rc != DB_NOTFOUND ) {
 346                 switch( rc ) {
 347                 case DB_LOCK_DEADLOCK:
 348                 case DB_LOCK_NOTGRANTED:
 349                         goto retry;
 350                 case 0:
 351 #ifdef NEW_LOGGING
 352                         LDAP_LOG ( OPERATION, DETAIL1,
 353                                 "<=- bdb_delete: non-leaf %s\n", dn->bv_val, 0, 0 );
 354 #else
 355                         Debug(LDAP_DEBUG_ARGS,
 356                                 "<=- bdb_delete: non-leaf %s\n",
 357                                 dn->bv_val, 0, 0);
 358 #endif
 359                         rc = LDAP_NOT_ALLOWED_ON_NONLEAF;
 360                         text = "subtree delete not supported";
 361                         break;
 362                 default:
 363 #ifdef NEW_LOGGING
 364                         LDAP_LOG ( OPERATION, ERR,
 365                                 "<=- bdb_delete: has_children failed %s (%d)\n",
 366                                 db_strerror(rc), rc, 0 );
 367 #else
 368                         Debug(LDAP_DEBUG_ARGS,
 369                                 "<=- bdb_delete: has_children failed: %s (%d)\n",
 370                                 db_strerror(rc), rc, 0 );
 371 #endif
 372                         rc = LDAP_OTHER;
 373                         text = "internal error";
 374                 }
 375                 goto return_results;
 376         }
 377
 378         /* delete from dn2id */
 379         rc = bdb_dn2id_delete( be, ltid, pdn.bv_val, e );
 380         if ( rc != 0 ) {
 381                 switch( rc ) {
 382                 case DB_LOCK_DEADLOCK:
 383                 case DB_LOCK_NOTGRANTED:
 384                         goto retry;
 385                 default:
 386                         rc = LDAP_OTHER;
 387                 }
 388 #ifdef NEW_LOGGING
 389                 LDAP_LOG ( OPERATION, ERR,
 390                         "<=- bdb_delete: dn2id failed %s (%d)\n", db_strerror(rc), rc, 0 );
 391 #else
 392                 Debug(LDAP_DEBUG_ARGS,
 393                         "<=- bdb_delete: dn2id failed: %s (%d)\n",
 394                         db_strerror(rc), rc, 0 );
 395 #endif
 396                 text = "DN index delete failed";
 397                 goto return_results;
 398         }
 399
 400         /* delete from id2entry */
 401         rc = bdb_id2entry_delete( be, ltid, e );
 402         if ( rc != 0 ) {
 403                 switch( rc ) {
 404                 case DB_LOCK_DEADLOCK:
 405                 case DB_LOCK_NOTGRANTED:
 406                         goto retry;
 407                 default:
 408                         rc = LDAP_OTHER;
 409                 }
 410 #ifdef NEW_LOGGING
 411                 LDAP_LOG ( OPERATION, ERR,
 412                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 413                         db_strerror(rc), rc, 0 );
 414 #else
 415                 Debug(LDAP_DEBUG_ARGS,
 416                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 417                         db_strerror(rc), rc, 0 );
 418 #endif
 419                 text = "entry delete failed";
 420                 goto return_results;
 421         }
 422
 423         /* delete indices for old attributes */
 424         rc = bdb_index_entry_del( be, ltid, e, e->e_attrs );
 425         if ( rc != LDAP_SUCCESS ) {
 426                 switch( rc ) {
 427                 case DB_LOCK_DEADLOCK:
 428                 case DB_LOCK_NOTGRANTED:
 429                         goto retry;
 430                 default:
 431                         rc = LDAP_OTHER;
 432                 }
 433 #ifdef NEW_LOGGING
 434                 LDAP_LOG ( OPERATION, ERR,
 435                         "<=- bdb_delete: entry index delete failed!\n", 0, 0, 0 );
 436 #else
 437                 Debug( LDAP_DEBUG_ANY, "entry index delete failed!\n",
 438                         0, 0, 0 );
 439 #endif
 440                 text = "entry index delete failed";
 441                 goto return_results;
 442         }
 443
 444 #if 0   /* Do we want to reclaim deleted IDs? */
 445         ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
 446         if ( e->e_id == bdb->bi_lastid ) {
 447                 bdb_last_id( be, ltid );
 448         }
 449         ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
 450 #endif
 451
 452         if( op->o_noop ) {
 453                 if ( ( rc = TXN_ABORT( ltid ) ) != 0 ) {
 454                         text = "txn_abort (no-op) failed";
 455                 } else {
 456                         noop = 1;
 457                         rc = LDAP_SUCCESS;
 458                 }
 459         } else {
 460                 rc = TXN_COMMIT( ltid, 0 );
 461         }
 462         ltid = NULL;
 463         op->o_private = NULL;
 464
 465         if( rc != 0 ) {
 466 #ifdef NEW_LOGGING
 467                 LDAP_LOG ( OPERATION, ERR,
 468                         "bdb_delete: txn_%s failed: %s (%d)\n",
 469                         op->o_noop ? "abort (no-op)" : "commit", db_strerror(rc), rc );
 470 #else
 471                 Debug( LDAP_DEBUG_TRACE,
 472                         "bdb_delete: txn_%s failed: %s (%d)\n",
 473                         op->o_noop ? "abort (no-op)" : "commit",
 474                         db_strerror(rc), rc );
 475 #endif
 476                 rc = LDAP_OTHER;
 477                 text = "commit failed";
 478
 479         } else {
 480 #ifdef NEW_LOGGING
 481                 LDAP_LOG ( OPERATION, RESULTS,
 482                         "bdb_delete: deleted%s id=%08lx db=\"%s\"\n",
 483                         op->o_noop ? " (no-op)" : "", e->e_id, e->e_dn );
 484 #else
 485                 Debug( LDAP_DEBUG_TRACE,
 486                         "bdb_delete: deleted%s id=%08lx dn=\"%s\"\n",
 487                         op->o_noop ? " (no-op)" : "",
 488                         e->e_id, e->e_dn );
 489 #endif
 490                 rc = LDAP_SUCCESS;
 491                 text = NULL;
 492         }
 493
 494 return_results:
 495         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 496
 497 #if defined(LDAP_CLIENT_UPDATE) || defined(LDAP_SYNC)
 498         if ( rc == LDAP_SUCCESS && !noop ) {
 499                 LDAP_LIST_FOREACH( ps_list, &bdb->psearch_list, link ) {
 500                         bdb_psearch( be, conn, op, ps_list, e, LDAP_PSEARCH_BY_DELETE );
 501                 }
 502         }
 503 #endif
 504
 505         if(rc == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 506                 ldap_pvt_thread_yield();
 507                 TXN_CHECKPOINT( bdb->bi_dbenv,
 508                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 509         }
 510
 511 done:
 512         /* free entry */
 513         if( e != NULL ) {
 514                 bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e);
 515         }
 516
 517         if( ltid != NULL ) {
 518                 TXN_ABORT( ltid );
 519                 op->o_private = NULL;
 520         }
 521
 522         return ( ( rc == LDAP_SUCCESS ) ? noop : rc );
 523 }