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 LDAP_CLIENT_UPDATE
  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_err = 0;
 108         op->o_private = &opinfo;
 109
 110         if ( !be_issuffix( be, ndn ) ) {
 111                 dnParent( ndn, &pdn );
 112         }
 113
 114         if( pdn.bv_len != 0 ) {
 115 #if 0
 116                 if ( ltid ) {
 117                         DBT obj;
 118                         obj.data = pdn.bv_val-1;
 119                         obj.size = pdn.bv_len+1;
 120                         rc = LOCK_GET( bdb->bi_dbenv, lockid, 0, &obj,
 121                                 DB_LOCK_WRITE, &lock);
 122                 }
 123 #endif
 124                 /* get parent */
 125                 rc = bdb_dn2entry_r( be, ltid, &pdn, &p, NULL, 0, locker, &lock );
 126
 127                 switch( rc ) {
 128                 case 0:
 129                 case DB_NOTFOUND:
 130                         break;
 131                 case DB_LOCK_DEADLOCK:
 132                 case DB_LOCK_NOTGRANTED:
 133                         goto retry;
 134                 case LDAP_BUSY:
 135                         text = "ldap server busy";
 136                         goto return_results;
 137                 default:
 138                         rc = LDAP_OTHER;
 139                         text = "internal error";
 140                         goto return_results;
 141                 }
 142
 143                 if( p == NULL) {
 144 #ifdef NEW_LOGGING
 145                         LDAP_LOG ( OPERATION, DETAIL1,
 146                                 "<=- bdb_delete: parent does not exist\n", 0, 0, 0 );
 147 #else
 148                         Debug( LDAP_DEBUG_TRACE,
 149                                 "<=- bdb_delete: parent does not exist\n",
 150                                 0, 0, 0);
 151 #endif
 152                         rc = LDAP_OTHER;
 153                         text = "could not locate parent of entry";
 154                         goto return_results;
 155                 }
 156
 157                 /* check parent for "children" acl */
 158                 rc = access_allowed( be, conn, op, p,
 159                         children, NULL, ACL_WRITE, NULL );
 160
 161                 bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p);
 162                 p = NULL;
 163
 164                 switch( opinfo.boi_err ) {
 165                 case DB_LOCK_DEADLOCK:
 166                 case DB_LOCK_NOTGRANTED:
 167                         goto retry;
 168                 }
 169
 170                 if ( !rc  ) {
 171 #ifdef NEW_LOGGING
 172                         LDAP_LOG ( OPERATION, DETAIL1,
 173                                 "<=- bdb_delete: no write access to parent\n", 0, 0, 0 );
 174 #else
 175                         Debug( LDAP_DEBUG_TRACE,
 176                                 "<=- bdb_delete: no write access to parent\n",
 177                                 0, 0, 0 );
 178 #endif
 179                         rc = LDAP_INSUFFICIENT_ACCESS;
 180                         text = "no write access to parent";
 181                         goto return_results;
 182                 }
 183
 184         } else {
 185                 /* no parent, must be root to delete */
 186                 if( ! be_isroot( be, &op->o_ndn ) ) {
 187                         if ( be_issuffix( be, (struct berval *)&slap_empty_bv )
 188                                 || be_isupdate( be, &op->o_ndn ) ) {
 189                                 p = (Entry *)&slap_entry_root;
 190
 191                                 /* check parent for "children" acl */
 192                                 rc = access_allowed( be, conn, op, p,
 193                                         children, NULL, ACL_WRITE, NULL );
 194
 195                                 p = NULL;
 196
 197                                 switch( opinfo.boi_err ) {
 198                                 case DB_LOCK_DEADLOCK:
 199                                 case DB_LOCK_NOTGRANTED:
 200                                         goto retry;
 201                                 }
 202
 203                                 if ( !rc  ) {
 204 #ifdef NEW_LOGGING
 205                                         LDAP_LOG ( OPERATION, DETAIL1,
 206                                                 "<=- bdb_delete: no access to parent\n", 0, 0, 0 );
 207 #else
 208                                         Debug( LDAP_DEBUG_TRACE,
 209                                                 "<=- bdb_delete: no access "
 210                                                 "to parent\n", 0, 0, 0 );
 211 #endif
 212                                         rc = LDAP_INSUFFICIENT_ACCESS;
 213                                         text = "no write access to parent";
 214                                         goto return_results;
 215                                 }
 216
 217                         } else {
 218 #ifdef NEW_LOGGING
 219                                 LDAP_LOG ( OPERATION, DETAIL1,
 220                                         "<=- bdb_delete: no parent and not root\n", 0, 0, 0 );
 221 #else
 222                                 Debug( LDAP_DEBUG_TRACE,
 223                                         "<=- bdb_delete: no parent "
 224                                         "and not root\n", 0, 0, 0);
 225 #endif
 226                                 rc = LDAP_INSUFFICIENT_ACCESS;
 227                                 goto return_results;
 228                         }
 229                 }
 230
 231 #if 0
 232                 if ( ltid ) {
 233                         DBT obj;
 234                         obj.data = ",";
 235                         obj.size = 1;
 236                         rc = LOCK_GET( bdb->bi_dbenv, lockid, 0, &obj,
 237                                 DB_LOCK_WRITE, &lock);
 238                 }
 239 #endif
 240         }
 241
 242         /* get entry for read/modify/write */
 243         rc = bdb_dn2entry_w( be, ltid, ndn, &e, &matched, DB_RMW, locker, &lock );
 244
 245         switch( rc ) {
 246         case 0:
 247         case DB_NOTFOUND:
 248                 break;
 249         case DB_LOCK_DEADLOCK:
 250         case DB_LOCK_NOTGRANTED:
 251                 goto retry;
 252         case LDAP_BUSY:
 253                 text = "ldap server busy";
 254                 goto return_results;
 255         default:
 256                 rc = LDAP_OTHER;
 257                 text = "internal error";
 258                 goto return_results;
 259         }
 260
 261         if ( e == NULL ) {
 262                 char *matched_dn = NULL;
 263                 BerVarray refs;
 264
 265 #ifdef NEW_LOGGING
 266                 LDAP_LOG ( OPERATION, ARGS,
 267                         "<=- bdb_delete: no such object %s\n", dn->bv_val, 0, 0);
 268 #else
 269                 Debug( LDAP_DEBUG_ARGS,
 270                         "<=- bdb_delete: no such object %s\n",
 271                         dn->bv_val, 0, 0);
 272 #endif
 273
 274                 if ( matched != NULL ) {
 275                         matched_dn = ch_strdup( matched->e_dn );
 276                         refs = is_entry_referral( matched )
 277                                 ? get_entry_referrals( be, conn, op, matched )
 278                                 : NULL;
 279                         bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, matched);
 280                         matched = NULL;
 281
 282                 } else {
 283                         refs = referral_rewrite( default_referral,
 284                                 NULL, dn, LDAP_SCOPE_DEFAULT );
 285                 }
 286
 287                 send_ldap_result( conn, op, LDAP_REFERRAL,
 288                         matched_dn, NULL, refs, NULL );
 289
 290                 ber_bvarray_free( refs );
 291                 free( matched_dn );
 292
 293                 rc = -1;
 294                 goto done;
 295         }
 296
 297         rc = access_allowed( be, conn, op, e,
 298                 entry, NULL, ACL_WRITE, NULL );
 299
 300         switch( opinfo.boi_err ) {
 301         case DB_LOCK_DEADLOCK:
 302         case DB_LOCK_NOTGRANTED:
 303                 goto retry;
 304         }
 305
 306         if ( !rc  ) {
 307 #ifdef NEW_LOGGING
 308                 LDAP_LOG ( OPERATION, DETAIL1,
 309                         "<=- bdb_delete: no write access to entry\n", 0, 0, 0 );
 310 #else
 311                 Debug( LDAP_DEBUG_TRACE,
 312                         "<=- bdb_delete: no write access to entry\n",
 313                         0, 0, 0 );
 314 #endif
 315                 rc = LDAP_INSUFFICIENT_ACCESS;
 316                 text = "no write access to entry";
 317                 goto return_results;
 318         }
 319
 320         if ( !manageDSAit && is_entry_referral( e ) ) {
 321                 /* entry is a referral, don't allow delete */
 322                 BerVarray refs = get_entry_referrals( be,
 323                         conn, op, e );
 324
 325 #ifdef NEW_LOGGING
 326                 LDAP_LOG ( OPERATION, DETAIL1,
 327                         "<=- bdb_delete: entry is referral\n", 0, 0, 0 );
 328 #else
 329                 Debug( LDAP_DEBUG_TRACE,
 330                         "bdb_delete: entry is referral\n",
 331                         0, 0, 0 );
 332 #endif
 333
 334                 send_ldap_result( conn, op, LDAP_REFERRAL,
 335                         e->e_dn, NULL, refs, NULL );
 336
 337                 ber_bvarray_free( refs );
 338
 339                 rc = 1;
 340                 goto done;
 341         }
 342
 343         rc = bdb_dn2id_children( be, ltid, &e->e_nname, 0 );
 344         if( rc != DB_NOTFOUND ) {
 345                 switch( rc ) {
 346                 case DB_LOCK_DEADLOCK:
 347                 case DB_LOCK_NOTGRANTED:
 348                         goto retry;
 349                 case 0:
 350 #ifdef NEW_LOGGING
 351                         LDAP_LOG ( OPERATION, DETAIL1,
 352                                 "<=- bdb_delete: non-leaf %s\n", dn->bv_val, 0, 0 );
 353 #else
 354                         Debug(LDAP_DEBUG_ARGS,
 355                                 "<=- bdb_delete: non-leaf %s\n",
 356                                 dn->bv_val, 0, 0);
 357 #endif
 358                         rc = LDAP_NOT_ALLOWED_ON_NONLEAF;
 359                         text = "subtree delete not supported";
 360                         break;
 361                 default:
 362 #ifdef NEW_LOGGING
 363                         LDAP_LOG ( OPERATION, ERR,
 364                                 "<=- bdb_delete: has_children failed %s (%d)\n",
 365                                 db_strerror(rc), rc, 0 );
 366 #else
 367                         Debug(LDAP_DEBUG_ARGS,
 368                                 "<=- bdb_delete: has_children failed: %s (%d)\n",
 369                                 db_strerror(rc), rc, 0 );
 370 #endif
 371                         rc = LDAP_OTHER;
 372                         text = "internal error";
 373                 }
 374                 goto return_results;
 375         }
 376
 377         /* delete from dn2id */
 378         rc = bdb_dn2id_delete( be, ltid, pdn.bv_val, e );
 379         if ( rc != 0 ) {
 380                 switch( rc ) {
 381                 case DB_LOCK_DEADLOCK:
 382                 case DB_LOCK_NOTGRANTED:
 383                         goto retry;
 384                 default:
 385                         rc = LDAP_OTHER;
 386                 }
 387 #ifdef NEW_LOGGING
 388                 LDAP_LOG ( OPERATION, ERR,
 389                         "<=- bdb_delete: dn2id failed %s (%d)\n", db_strerror(rc), rc, 0 );
 390 #else
 391                 Debug(LDAP_DEBUG_ARGS,
 392                         "<=- bdb_delete: dn2id failed: %s (%d)\n",
 393                         db_strerror(rc), rc, 0 );
 394 #endif
 395                 text = "DN index delete failed";
 396                 goto return_results;
 397         }
 398
 399         /* delete from id2entry */
 400         rc = bdb_id2entry_delete( be, ltid, e );
 401         if ( rc != 0 ) {
 402                 switch( rc ) {
 403                 case DB_LOCK_DEADLOCK:
 404                 case DB_LOCK_NOTGRANTED:
 405                         goto retry;
 406                 default:
 407                         rc = LDAP_OTHER;
 408                 }
 409 #ifdef NEW_LOGGING
 410                 LDAP_LOG ( OPERATION, ERR,
 411                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 412                         db_strerror(rc), rc, 0 );
 413 #else
 414                 Debug(LDAP_DEBUG_ARGS,
 415                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 416                         db_strerror(rc), rc, 0 );
 417 #endif
 418                 text = "entry delete failed";
 419                 goto return_results;
 420         }
 421
 422         /* delete indices for old attributes */
 423         rc = bdb_index_entry_del( be, ltid, e, e->e_attrs );
 424         if ( rc != LDAP_SUCCESS ) {
 425                 switch( rc ) {
 426                 case DB_LOCK_DEADLOCK:
 427                 case DB_LOCK_NOTGRANTED:
 428                         goto retry;
 429                 default:
 430                         rc = LDAP_OTHER;
 431                 }
 432 #ifdef NEW_LOGGING
 433                 LDAP_LOG ( OPERATION, ERR,
 434                         "<=- bdb_delete: entry index delete failed!\n", 0, 0, 0 );
 435 #else
 436                 Debug( LDAP_DEBUG_ANY, "entry index delete failed!\n",
 437                         0, 0, 0 );
 438 #endif
 439                 text = "entry index delete failed";
 440                 goto return_results;
 441         }
 442
 443 #if 0   /* Do we want to reclaim deleted IDs? */
 444         ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
 445         if ( e->e_id == bdb->bi_lastid ) {
 446                 bdb_last_id( be, ltid );
 447         }
 448         ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
 449 #endif
 450
 451         if( op->o_noop ) {
 452                 if ( ( rc = TXN_ABORT( ltid ) ) != 0 ) {
 453                         text = "txn_abort (no-op) failed";
 454                 } else {
 455                         noop = 1;
 456                         rc = LDAP_SUCCESS;
 457                 }
 458         } else {
 459                 rc = TXN_COMMIT( ltid, 0 );
 460         }
 461         ltid = NULL;
 462         op->o_private = NULL;
 463
 464         if( rc != 0 ) {
 465 #ifdef NEW_LOGGING
 466                 LDAP_LOG ( OPERATION, ERR,
 467                         "bdb_delete: txn_%s failed: %s (%d)\n",
 468                         op->o_noop ? "abort (no-op)" : "commit", db_strerror(rc), rc );
 469 #else
 470                 Debug( LDAP_DEBUG_TRACE,
 471                         "bdb_delete: txn_%s failed: %s (%d)\n",
 472                         op->o_noop ? "abort (no-op)" : "commit",
 473                         db_strerror(rc), rc );
 474 #endif
 475                 rc = LDAP_OTHER;
 476                 text = "commit failed";
 477
 478         } else {
 479 #ifdef NEW_LOGGING
 480                 LDAP_LOG ( OPERATION, RESULTS,
 481                         "bdb_delete: deleted%s id=%08lx db=\"%s\"\n",
 482                         op->o_noop ? " (no-op)" : "", e->e_id, e->e_dn );
 483 #else
 484                 Debug( LDAP_DEBUG_TRACE,
 485                         "bdb_delete: deleted%s id=%08lx dn=\"%s\"\n",
 486                         op->o_noop ? " (no-op)" : "",
 487                         e->e_id, e->e_dn );
 488 #endif
 489                 rc = LDAP_SUCCESS;
 490                 text = NULL;
 491         }
 492
 493 return_results:
 494         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 495
 496 #ifdef LDAP_CLIENT_UPDATE
 497         if ( rc == LDAP_SUCCESS && !noop ) {
 498                 LDAP_LIST_FOREACH( ps_list, &bdb->psearch_list, link ) {
 499                         bdb_psearch( be, conn, op, ps_list, e, LCUP_PSEARCH_BY_DELETE );
 500                 }
 501         }
 502 #endif /* LDAP_CLIENT_UPDATE */
 503
 504         if(rc == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 505                 ldap_pvt_thread_yield();
 506                 TXN_CHECKPOINT( bdb->bi_dbenv,
 507                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 508         }
 509
 510 done:
 511         /* free entry */
 512         if( e != NULL ) {
 513                 bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e);
 514         }
 515
 516         if( ltid != NULL ) {
 517                 TXN_ABORT( ltid );
 518                 op->o_private = NULL;
 519         }
 520
 521         return ( ( rc == LDAP_SUCCESS ) ? noop : rc );
 522 }