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

   1 /* delete.c - bdb backend delete routine */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2002 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;
  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 #ifdef NEW_LOGGING
  48         LDAP_LOG ( OPERATION, ARGS,  "==> bdb_delete: %s\n", dn->bv_val, 0, 0 );
  49 #else
  50         Debug( LDAP_DEBUG_ARGS, "==> bdb_delete: %s\n",
  51                 dn->bv_val, 0, 0 );
  52 #endif
  53
  54         if( 0 ) {
  55 retry:  /* transaction retry */
  56                 if( e != NULL ) {
  57                         bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e);
  58                 }
  59 #ifdef NEW_LOGGING
  60                 LDAP_LOG ( OPERATION, DETAIL1,
  61                         "==> bdb_delete: retrying...\n", 0, 0, 0 );
  62 #else
  63                 Debug( LDAP_DEBUG_TRACE, "==> bdb_delete: retrying...\n",
  64                         0, 0, 0 );
  65 #endif
  66                 rc = TXN_ABORT( ltid );
  67                 ltid = NULL;
  68                 op->o_private = NULL;
  69                 if( rc != 0 ) {
  70                         rc = LDAP_OTHER;
  71                         text = "internal error";
  72                         goto return_results;
  73                 }
  74                 ldap_pvt_thread_yield();
  75         }
  76
  77         /* begin transaction */
  78         rc = TXN_BEGIN( bdb->bi_dbenv, NULL, &ltid,
  79                 bdb->bi_db_opflags );
  80         text = NULL;
  81         if( rc != 0 ) {
  82 #ifdef NEW_LOGGING
  83                 LDAP_LOG ( OPERATION, ERR,
  84                         "==> bdb_delete: txn_begin failed: %s (%d)\n",
  85                         db_strerror(rc), rc, 0 );
  86 #else
  87                 Debug( LDAP_DEBUG_TRACE,
  88                         "bdb_delete: txn_begin failed: %s (%d)\n",
  89                         db_strerror(rc), rc, 0 );
  90 #endif
  91                 rc = LDAP_OTHER;
  92                 text = "internal error";
  93                 goto return_results;
  94         }
  95
  96         locker = TXN_ID ( ltid );
  97 #if 0
  98         lockid = TXN_ID( ltid );
  99 #endif
 100
 101         opinfo.boi_bdb = be;
 102         opinfo.boi_txn = ltid;
 103         opinfo.boi_err = 0;
 104         op->o_private = &opinfo;
 105
 106         if ( !be_issuffix( be, ndn ) ) {
 107                 dnParent( ndn, &pdn );
 108         }
 109
 110         if( pdn.bv_len != 0 ) {
 111 #if 0
 112                 if ( ltid ) {
 113                         DBT obj;
 114                         obj.data = pdn.bv_val-1;
 115                         obj.size = pdn.bv_len+1;
 116                         rc = LOCK_GET( bdb->bi_dbenv, lockid, 0, &obj,
 117                                 DB_LOCK_WRITE, &lock);
 118                 }
 119 #endif
 120                 /* get parent */
 121                 rc = bdb_dn2entry_r( be, ltid, &pdn, &p, NULL, 0, locker, &lock );
 122
 123                 switch( rc ) {
 124                 case 0:
 125                 case DB_NOTFOUND:
 126                         break;
 127                 case DB_LOCK_DEADLOCK:
 128                 case DB_LOCK_NOTGRANTED:
 129                         goto retry;
 130                 case LDAP_BUSY:
 131                         text = "ldap server busy";
 132                         goto return_results;
 133                 default:
 134                         rc = LDAP_OTHER;
 135                         text = "internal error";
 136                         goto return_results;
 137                 }
 138
 139                 if( p == NULL) {
 140 #ifdef NEW_LOGGING
 141                         LDAP_LOG ( OPERATION, DETAIL1,
 142                                 "<=- bdb_delete: parent does not exist\n", 0, 0, 0 );
 143 #else
 144                         Debug( LDAP_DEBUG_TRACE,
 145                                 "<=- bdb_delete: parent does not exist\n",
 146                                 0, 0, 0);
 147 #endif
 148                         rc = LDAP_OTHER;
 149                         text = "could not locate parent of entry";
 150                         goto return_results;
 151                 }
 152
 153                 /* check parent for "children" acl */
 154                 rc = access_allowed( be, conn, op, p,
 155                         children, NULL, ACL_WRITE, NULL );
 156
 157                 bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p);
 158                 p = NULL;
 159
 160                 switch( opinfo.boi_err ) {
 161                 case DB_LOCK_DEADLOCK:
 162                 case DB_LOCK_NOTGRANTED:
 163                         goto retry;
 164                 }
 165
 166                 if ( !rc  ) {
 167 #ifdef NEW_LOGGING
 168                         LDAP_LOG ( OPERATION, DETAIL1,
 169                                 "<=- bdb_delete: no write access to parent\n", 0, 0, 0 );
 170 #else
 171                         Debug( LDAP_DEBUG_TRACE,
 172                                 "<=- bdb_delete: no write access to parent\n",
 173                                 0, 0, 0 );
 174 #endif
 175                         rc = LDAP_INSUFFICIENT_ACCESS;
 176                         text = "no write access to parent";
 177                         goto return_results;
 178                 }
 179
 180         } else {
 181                 /* no parent, must be root to delete */
 182                 if( ! be_isroot( be, &op->o_ndn ) ) {
 183                         if ( be_issuffix( be, (struct berval *)&slap_empty_bv )
 184                                 || be_isupdate( be, &op->o_ndn ) ) {
 185                                 p = (Entry *)&slap_entry_root;
 186
 187                                 /* check parent for "children" acl */
 188                                 rc = access_allowed( be, conn, op, p,
 189                                         children, NULL, ACL_WRITE, NULL );
 190
 191                                 p = NULL;
 192
 193                                 switch( opinfo.boi_err ) {
 194                                 case DB_LOCK_DEADLOCK:
 195                                 case DB_LOCK_NOTGRANTED:
 196                                         goto retry;
 197                                 }
 198
 199                                 if ( !rc  ) {
 200 #ifdef NEW_LOGGING
 201                                         LDAP_LOG ( OPERATION, DETAIL1,
 202                                                 "<=- bdb_delete: no access to parent\n", 0, 0, 0 );
 203 #else
 204                                         Debug( LDAP_DEBUG_TRACE,
 205                                                 "<=- bdb_delete: no access "
 206                                                 "to parent\n", 0, 0, 0 );
 207 #endif
 208                                         rc = LDAP_INSUFFICIENT_ACCESS;
 209                                         text = "no write access to parent";
 210                                         goto return_results;
 211                                 }
 212
 213                         } else {
 214 #ifdef NEW_LOGGING
 215                                 LDAP_LOG ( OPERATION, DETAIL1,
 216                                         "<=- bdb_delete: no parent and not root\n", 0, 0, 0 );
 217 #else
 218                                 Debug( LDAP_DEBUG_TRACE,
 219                                         "<=- bdb_delete: no parent "
 220                                         "and not root\n", 0, 0, 0);
 221 #endif
 222                                 rc = LDAP_INSUFFICIENT_ACCESS;
 223                                 goto return_results;
 224                         }
 225                 }
 226
 227 #if 0
 228                 if ( ltid ) {
 229                         DBT obj;
 230                         obj.data = ",";
 231                         obj.size = 1;
 232                         rc = LOCK_GET( bdb->bi_dbenv, lockid, 0, &obj,
 233                                 DB_LOCK_WRITE, &lock);
 234                 }
 235 #endif
 236         }
 237
 238         /* get entry for read/modify/write */
 239         rc = bdb_dn2entry_w( be, ltid, ndn, &e, &matched, DB_RMW, locker, &lock );
 240
 241         switch( rc ) {
 242         case 0:
 243         case DB_NOTFOUND:
 244                 break;
 245         case DB_LOCK_DEADLOCK:
 246         case DB_LOCK_NOTGRANTED:
 247                 goto retry;
 248         case LDAP_BUSY:
 249                 text = "ldap server busy";
 250                 goto return_results;
 251         default:
 252                 rc = LDAP_OTHER;
 253                 text = "internal error";
 254                 goto return_results;
 255         }
 256
 257         if ( e == NULL ) {
 258                 char *matched_dn = NULL;
 259                 BerVarray refs;
 260
 261 #ifdef NEW_LOGGING
 262                 LDAP_LOG ( OPERATION, ARGS,
 263                         "<=- bdb_delete: no such object %s\n", dn->bv_val, 0, 0);
 264 #else
 265                 Debug( LDAP_DEBUG_ARGS,
 266                         "<=- bdb_delete: no such object %s\n",
 267                         dn->bv_val, 0, 0);
 268 #endif
 269
 270                 if ( matched != NULL ) {
 271                         matched_dn = ch_strdup( matched->e_dn );
 272                         refs = is_entry_referral( matched )
 273                                 ? get_entry_referrals( be, conn, op, matched )
 274                                 : NULL;
 275                         bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, matched);
 276                         matched = NULL;
 277
 278                 } else {
 279                         refs = referral_rewrite( default_referral,
 280                                 NULL, dn, LDAP_SCOPE_DEFAULT );
 281                 }
 282
 283                 send_ldap_result( conn, op, LDAP_REFERRAL,
 284                         matched_dn, NULL, refs, NULL );
 285
 286                 ber_bvarray_free( refs );
 287                 free( matched_dn );
 288
 289                 rc = -1;
 290                 goto done;
 291         }
 292
 293         rc = access_allowed( be, conn, op, e,
 294                 entry, NULL, ACL_WRITE, NULL );
 295
 296         switch( opinfo.boi_err ) {
 297         case DB_LOCK_DEADLOCK:
 298         case DB_LOCK_NOTGRANTED:
 299                 goto retry;
 300         }
 301
 302         if ( !rc  ) {
 303 #ifdef NEW_LOGGING
 304                 LDAP_LOG ( OPERATION, DETAIL1,
 305                         "<=- bdb_delete: no write access to entry\n", 0, 0, 0 );
 306 #else
 307                 Debug( LDAP_DEBUG_TRACE,
 308                         "<=- bdb_delete: no write access to entry\n",
 309                         0, 0, 0 );
 310 #endif
 311                 rc = LDAP_INSUFFICIENT_ACCESS;
 312                 text = "no write access to entry";
 313                 goto return_results;
 314         }
 315
 316         if ( !manageDSAit && is_entry_referral( e ) ) {
 317                 /* entry is a referral, don't allow delete */
 318                 BerVarray refs = get_entry_referrals( be,
 319                         conn, op, e );
 320
 321 #ifdef NEW_LOGGING
 322                 LDAP_LOG ( OPERATION, DETAIL1,
 323                         "<=- bdb_delete: entry is referral\n", 0, 0, 0 );
 324 #else
 325                 Debug( LDAP_DEBUG_TRACE,
 326                         "bdb_delete: entry is referral\n",
 327                         0, 0, 0 );
 328 #endif
 329
 330                 send_ldap_result( conn, op, LDAP_REFERRAL,
 331                         e->e_dn, NULL, refs, NULL );
 332
 333                 ber_bvarray_free( refs );
 334
 335                 rc = 1;
 336                 goto done;
 337         }
 338
 339         rc = bdb_dn2id_children( be, ltid, &e->e_nname, 0 );
 340         if( rc != DB_NOTFOUND ) {
 341                 switch( rc ) {
 342                 case DB_LOCK_DEADLOCK:
 343                 case DB_LOCK_NOTGRANTED:
 344                         goto retry;
 345                 case 0:
 346 #ifdef NEW_LOGGING
 347                         LDAP_LOG ( OPERATION, DETAIL1,
 348                                 "<=- bdb_delete: non-leaf %s\n", dn->bv_val, 0, 0 );
 349 #else
 350                         Debug(LDAP_DEBUG_ARGS,
 351                                 "<=- bdb_delete: non-leaf %s\n",
 352                                 dn->bv_val, 0, 0);
 353 #endif
 354                         rc = LDAP_NOT_ALLOWED_ON_NONLEAF;
 355                         text = "subtree delete not supported";
 356                         break;
 357                 default:
 358 #ifdef NEW_LOGGING
 359                         LDAP_LOG ( OPERATION, ERR,
 360                                 "<=- bdb_delete: has_children failed %s (%d)\n",
 361                                 db_strerror(rc), rc, 0 );
 362 #else
 363                         Debug(LDAP_DEBUG_ARGS,
 364                                 "<=- bdb_delete: has_children failed: %s (%d)\n",
 365                                 db_strerror(rc), rc, 0 );
 366 #endif
 367                         rc = LDAP_OTHER;
 368                         text = "internal error";
 369                 }
 370                 goto return_results;
 371         }
 372
 373         /* delete from dn2id */
 374         rc = bdb_dn2id_delete( be, ltid, pdn.bv_val, e );
 375         if ( rc != 0 ) {
 376                 switch( rc ) {
 377                 case DB_LOCK_DEADLOCK:
 378                 case DB_LOCK_NOTGRANTED:
 379                         goto retry;
 380                 default:
 381                         rc = LDAP_OTHER;
 382                 }
 383 #ifdef NEW_LOGGING
 384                 LDAP_LOG ( OPERATION, ERR,
 385                         "<=- bdb_delete: dn2id failed %s (%d)\n", db_strerror(rc), rc, 0 );
 386 #else
 387                 Debug(LDAP_DEBUG_ARGS,
 388                         "<=- bdb_delete: dn2id failed: %s (%d)\n",
 389                         db_strerror(rc), rc, 0 );
 390 #endif
 391                 text = "DN index delete failed";
 392                 goto return_results;
 393         }
 394
 395         /* delete from id2entry */
 396         rc = bdb_id2entry_delete( be, ltid, e );
 397         if ( rc != 0 ) {
 398                 switch( rc ) {
 399                 case DB_LOCK_DEADLOCK:
 400                 case DB_LOCK_NOTGRANTED:
 401                         goto retry;
 402                 default:
 403                         rc = LDAP_OTHER;
 404                 }
 405 #ifdef NEW_LOGGING
 406                 LDAP_LOG ( OPERATION, ERR,
 407                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 408                         db_strerror(rc), rc, 0 );
 409 #else
 410                 Debug(LDAP_DEBUG_ARGS,
 411                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 412                         db_strerror(rc), rc, 0 );
 413 #endif
 414                 text = "entry delete failed";
 415                 goto return_results;
 416         }
 417
 418         /* delete indices for old attributes */
 419         rc = bdb_index_entry_del( be, ltid, e, e->e_attrs );
 420         if ( rc != LDAP_SUCCESS ) {
 421                 switch( rc ) {
 422                 case DB_LOCK_DEADLOCK:
 423                 case DB_LOCK_NOTGRANTED:
 424                         goto retry;
 425                 default:
 426                         rc = LDAP_OTHER;
 427                 }
 428 #ifdef NEW_LOGGING
 429                 LDAP_LOG ( OPERATION, ERR,
 430                         "<=- bdb_delete: entry index delete failed!\n", 0, 0, 0 );
 431 #else
 432                 Debug( LDAP_DEBUG_ANY, "entry index delete failed!\n",
 433                         0, 0, 0 );
 434 #endif
 435                 text = "entry index delete failed";
 436                 goto return_results;
 437         }
 438
 439 #if 0   /* Do we want to reclaim deleted IDs? */
 440         ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
 441         if ( e->e_id == bdb->bi_lastid ) {
 442                 bdb_last_id( be, ltid );
 443         }
 444         ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
 445 #endif
 446
 447         if( op->o_noop ) {
 448                 if ( ( rc = TXN_ABORT( ltid ) ) != 0 ) {
 449                         text = "txn_abort (no-op) failed";
 450                 } else {
 451                         noop = 1;
 452                         rc = LDAP_SUCCESS;
 453                 }
 454         } else {
 455                 rc = TXN_COMMIT( ltid, 0 );
 456         }
 457         ltid = NULL;
 458         op->o_private = NULL;
 459
 460         if( rc != 0 ) {
 461 #ifdef NEW_LOGGING
 462                 LDAP_LOG ( OPERATION, ERR,
 463                         "bdb_delete: txn_%s failed: %s (%d)\n",
 464                         op->o_noop ? "abort (no-op)" : "commit", db_strerror(rc), rc );
 465 #else
 466                 Debug( LDAP_DEBUG_TRACE,
 467                         "bdb_delete: txn_%s failed: %s (%d)\n",
 468                         op->o_noop ? "abort (no-op)" : "commit",
 469                         db_strerror(rc), rc );
 470 #endif
 471                 rc = LDAP_OTHER;
 472                 text = "commit failed";
 473
 474         } else {
 475 #ifdef NEW_LOGGING
 476                 LDAP_LOG ( OPERATION, RESULTS,
 477                         "bdb_delete: deleted%s id=%08lx db=\"%s\"\n",
 478                         op->o_noop ? " (no-op)" : "", e->e_id, e->e_dn );
 479 #else
 480                 Debug( LDAP_DEBUG_TRACE,
 481                         "bdb_delete: deleted%s id=%08lx dn=\"%s\"\n",
 482                         op->o_noop ? " (no-op)" : "",
 483                         e->e_id, e->e_dn );
 484 #endif
 485                 rc = LDAP_SUCCESS;
 486                 text = NULL;
 487         }
 488
 489 return_results:
 490         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 491
 492         if(rc == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 493                 ldap_pvt_thread_yield();
 494                 TXN_CHECKPOINT( bdb->bi_dbenv,
 495                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 496         }
 497
 498 done:
 499         /* free entry */
 500         if( e != NULL ) {
 501                 bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e);
 502         }
 503
 504         if( ltid != NULL ) {
 505                 TXN_ABORT( ltid );
 506                 op->o_private = NULL;
 507         }
 508
 509         return ( ( rc == LDAP_SUCCESS ) ? noop : rc );
 510 }