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                 op->o_do_not_cache = opinfo.boi_acl_cache;
  74                 if( rc != 0 ) {
  75                         rc = LDAP_OTHER;
  76                         text = "internal error";
  77                         goto return_results;
  78                 }
  79                 ldap_pvt_thread_yield();
  80         }
  81
  82         /* begin transaction */
  83         rc = TXN_BEGIN( bdb->bi_dbenv, NULL, &ltid,
  84                 bdb->bi_db_opflags );
  85         text = NULL;
  86         if( rc != 0 ) {
  87 #ifdef NEW_LOGGING
  88                 LDAP_LOG ( OPERATION, ERR,
  89                         "==> bdb_delete: txn_begin failed: %s (%d)\n",
  90                         db_strerror(rc), rc, 0 );
  91 #else
  92                 Debug( LDAP_DEBUG_TRACE,
  93                         "bdb_delete: txn_begin failed: %s (%d)\n",
  94                         db_strerror(rc), rc, 0 );
  95 #endif
  96                 rc = LDAP_OTHER;
  97                 text = "internal error";
  98                 goto return_results;
  99         }
 100
 101         locker = TXN_ID ( ltid );
 102 #if 0
 103         lockid = TXN_ID( ltid );
 104 #endif
 105
 106         opinfo.boi_bdb = be;
 107         opinfo.boi_txn = ltid;
 108         opinfo.boi_locker = locker;
 109         opinfo.boi_err = 0;
 110         opinfo.boi_acl_cache = op->o_do_not_cache;
 111         op->o_private = &opinfo;
 112
 113         if ( !be_issuffix( be, ndn ) ) {
 114                 dnParent( ndn, &pdn );
 115         }
 116
 117         if( pdn.bv_len != 0 ) {
 118 #if 0
 119                 if ( ltid ) {
 120                         DBT obj;
 121                         obj.data = pdn.bv_val-1;
 122                         obj.size = pdn.bv_len+1;
 123                         rc = LOCK_GET( bdb->bi_dbenv, lockid, 0, &obj,
 124                                 DB_LOCK_WRITE, &lock);
 125                 }
 126 #endif
 127                 /* get parent */
 128                 rc = bdb_dn2entry_r( be, ltid, &pdn, &p, NULL, 0, locker, &lock );
 129
 130                 switch( rc ) {
 131                 case 0:
 132                 case DB_NOTFOUND:
 133                         break;
 134                 case DB_LOCK_DEADLOCK:
 135                 case DB_LOCK_NOTGRANTED:
 136                         goto retry;
 137                 case LDAP_BUSY:
 138                         text = "ldap server busy";
 139                         goto return_results;
 140                 default:
 141                         rc = LDAP_OTHER;
 142                         text = "internal error";
 143                         goto return_results;
 144                 }
 145
 146                 if( p == NULL) {
 147 #ifdef NEW_LOGGING
 148                         LDAP_LOG ( OPERATION, DETAIL1,
 149                                 "<=- bdb_delete: parent does not exist\n", 0, 0, 0 );
 150 #else
 151                         Debug( LDAP_DEBUG_TRACE,
 152                                 "<=- bdb_delete: parent does not exist\n",
 153                                 0, 0, 0);
 154 #endif
 155                         rc = LDAP_OTHER;
 156                         text = "could not locate parent of entry";
 157                         goto return_results;
 158                 }
 159
 160                 /* check parent for "children" acl */
 161                 rc = access_allowed( be, conn, op, p,
 162                         children, NULL, ACL_WRITE, NULL );
 163
 164                 bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p);
 165                 p = NULL;
 166
 167                 if ( !rc  ) {
 168                         switch( opinfo.boi_err ) {
 169                         case DB_LOCK_DEADLOCK:
 170                         case DB_LOCK_NOTGRANTED:
 171                                 goto retry;
 172                         }
 173
 174 #ifdef NEW_LOGGING
 175                         LDAP_LOG ( OPERATION, DETAIL1,
 176                                 "<=- bdb_delete: no write access to parent\n", 0, 0, 0 );
 177 #else
 178                         Debug( LDAP_DEBUG_TRACE,
 179                                 "<=- bdb_delete: no write access to parent\n",
 180                                 0, 0, 0 );
 181 #endif
 182                         rc = LDAP_INSUFFICIENT_ACCESS;
 183                         text = "no write access to parent";
 184                         goto return_results;
 185                 }
 186
 187         } else {
 188                 /* no parent, must be root to delete */
 189                 if( ! be_isroot( be, &op->o_ndn ) ) {
 190                         if ( be_issuffix( be, (struct berval *)&slap_empty_bv )
 191                                 || be_isupdate( be, &op->o_ndn ) ) {
 192                                 p = (Entry *)&slap_entry_root;
 193
 194                                 /* check parent for "children" acl */
 195                                 rc = access_allowed( be, conn, op, p,
 196                                         children, NULL, ACL_WRITE, NULL );
 197
 198                                 p = NULL;
 199
 200                                 if ( !rc  ) {
 201                                         switch( opinfo.boi_err ) {
 202                                         case DB_LOCK_DEADLOCK:
 203                                         case DB_LOCK_NOTGRANTED:
 204                                                 goto retry;
 205                                         }
 206
 207 #ifdef NEW_LOGGING
 208                                         LDAP_LOG ( OPERATION, DETAIL1,
 209                                                 "<=- bdb_delete: no access to parent\n", 0, 0, 0 );
 210 #else
 211                                         Debug( LDAP_DEBUG_TRACE,
 212                                                 "<=- bdb_delete: no access "
 213                                                 "to parent\n", 0, 0, 0 );
 214 #endif
 215                                         rc = LDAP_INSUFFICIENT_ACCESS;
 216                                         text = "no write access to parent";
 217                                         goto return_results;
 218                                 }
 219
 220                         } else {
 221 #ifdef NEW_LOGGING
 222                                 LDAP_LOG ( OPERATION, DETAIL1,
 223                                         "<=- bdb_delete: no parent and not root\n", 0, 0, 0 );
 224 #else
 225                                 Debug( LDAP_DEBUG_TRACE,
 226                                         "<=- bdb_delete: no parent "
 227                                         "and not root\n", 0, 0, 0);
 228 #endif
 229                                 rc = LDAP_INSUFFICIENT_ACCESS;
 230                                 goto return_results;
 231                         }
 232                 }
 233
 234 #if 0
 235                 if ( ltid ) {
 236                         DBT obj;
 237                         obj.data = ",";
 238                         obj.size = 1;
 239                         rc = LOCK_GET( bdb->bi_dbenv, lockid, 0, &obj,
 240                                 DB_LOCK_WRITE, &lock);
 241                 }
 242 #endif
 243         }
 244
 245         /* get entry for read/modify/write */
 246         rc = bdb_dn2entry_w( be, ltid, ndn, &e, &matched, DB_RMW, locker, &lock );
 247
 248         switch( rc ) {
 249         case 0:
 250         case DB_NOTFOUND:
 251                 break;
 252         case DB_LOCK_DEADLOCK:
 253         case DB_LOCK_NOTGRANTED:
 254                 goto retry;
 255         case LDAP_BUSY:
 256                 text = "ldap server busy";
 257                 goto return_results;
 258         default:
 259                 rc = LDAP_OTHER;
 260                 text = "internal error";
 261                 goto return_results;
 262         }
 263
 264         if ( e == NULL ) {
 265                 char *matched_dn = NULL;
 266                 BerVarray refs;
 267
 268 #ifdef NEW_LOGGING
 269                 LDAP_LOG ( OPERATION, ARGS,
 270                         "<=- bdb_delete: no such object %s\n", dn->bv_val, 0, 0);
 271 #else
 272                 Debug( LDAP_DEBUG_ARGS,
 273                         "<=- bdb_delete: no such object %s\n",
 274                         dn->bv_val, 0, 0);
 275 #endif
 276
 277                 if ( matched != NULL ) {
 278                         matched_dn = ch_strdup( matched->e_dn );
 279                         refs = is_entry_referral( matched )
 280                                 ? get_entry_referrals( be, conn, op, matched )
 281                                 : NULL;
 282                         bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, matched);
 283                         matched = NULL;
 284
 285                 } else {
 286                         refs = referral_rewrite( default_referral,
 287                                 NULL, dn, LDAP_SCOPE_DEFAULT );
 288                 }
 289
 290                 send_ldap_result( conn, op, LDAP_REFERRAL,
 291                         matched_dn, NULL, refs, NULL );
 292
 293                 ber_bvarray_free( refs );
 294                 free( matched_dn );
 295
 296                 rc = -1;
 297                 goto done;
 298         }
 299
 300         rc = access_allowed( be, conn, op, e,
 301                 entry, NULL, ACL_WRITE, NULL );
 302
 303         if ( !rc  ) {
 304                 switch( opinfo.boi_err ) {
 305                 case DB_LOCK_DEADLOCK:
 306                 case DB_LOCK_NOTGRANTED:
 307                         goto retry;
 308                 }
 309
 310 #ifdef NEW_LOGGING
 311                 LDAP_LOG ( OPERATION, DETAIL1,
 312                         "<=- bdb_delete: no write access to entry\n", 0, 0, 0 );
 313 #else
 314                 Debug( LDAP_DEBUG_TRACE,
 315                         "<=- bdb_delete: no write access to entry\n",
 316                         0, 0, 0 );
 317 #endif
 318                 rc = LDAP_INSUFFICIENT_ACCESS;
 319                 text = "no write access to entry";
 320                 goto return_results;
 321         }
 322
 323         if ( !manageDSAit && is_entry_referral( e ) ) {
 324                 /* entry is a referral, don't allow delete */
 325                 BerVarray refs = get_entry_referrals( be,
 326                         conn, op, e );
 327
 328 #ifdef NEW_LOGGING
 329                 LDAP_LOG ( OPERATION, DETAIL1,
 330                         "<=- bdb_delete: entry is referral\n", 0, 0, 0 );
 331 #else
 332                 Debug( LDAP_DEBUG_TRACE,
 333                         "bdb_delete: entry is referral\n",
 334                         0, 0, 0 );
 335 #endif
 336
 337                 send_ldap_result( conn, op, LDAP_REFERRAL,
 338                         e->e_dn, NULL, refs, NULL );
 339
 340                 ber_bvarray_free( refs );
 341
 342                 rc = 1;
 343                 goto done;
 344         }
 345
 346         rc = bdb_dn2id_children( be, ltid, &e->e_nname, 0 );
 347         if( rc != DB_NOTFOUND ) {
 348                 switch( rc ) {
 349                 case DB_LOCK_DEADLOCK:
 350                 case DB_LOCK_NOTGRANTED:
 351                         goto retry;
 352                 case 0:
 353 #ifdef NEW_LOGGING
 354                         LDAP_LOG ( OPERATION, DETAIL1,
 355                                 "<=- bdb_delete: non-leaf %s\n", dn->bv_val, 0, 0 );
 356 #else
 357                         Debug(LDAP_DEBUG_ARGS,
 358                                 "<=- bdb_delete: non-leaf %s\n",
 359                                 dn->bv_val, 0, 0);
 360 #endif
 361                         rc = LDAP_NOT_ALLOWED_ON_NONLEAF;
 362                         text = "subtree delete not supported";
 363                         break;
 364                 default:
 365 #ifdef NEW_LOGGING
 366                         LDAP_LOG ( OPERATION, ERR,
 367                                 "<=- bdb_delete: has_children failed %s (%d)\n",
 368                                 db_strerror(rc), rc, 0 );
 369 #else
 370                         Debug(LDAP_DEBUG_ARGS,
 371                                 "<=- bdb_delete: has_children failed: %s (%d)\n",
 372                                 db_strerror(rc), rc, 0 );
 373 #endif
 374                         rc = LDAP_OTHER;
 375                         text = "internal error";
 376                 }
 377                 goto return_results;
 378         }
 379
 380         /* delete from dn2id */
 381         rc = bdb_dn2id_delete( be, ltid, pdn.bv_val, e );
 382         if ( rc != 0 ) {
 383                 switch( rc ) {
 384                 case DB_LOCK_DEADLOCK:
 385                 case DB_LOCK_NOTGRANTED:
 386                         goto retry;
 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                 rc = LDAP_OTHER;
 398                 goto return_results;
 399         }
 400
 401         /* delete from id2entry */
 402         rc = bdb_id2entry_delete( be, ltid, e );
 403         if ( rc != 0 ) {
 404                 switch( rc ) {
 405                 case DB_LOCK_DEADLOCK:
 406                 case DB_LOCK_NOTGRANTED:
 407                         goto retry;
 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                 rc = LDAP_OTHER;
 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                 }
 431 #ifdef NEW_LOGGING
 432                 LDAP_LOG ( OPERATION, ERR,
 433                         "<=- bdb_delete: entry index delete failed!\n", 0, 0, 0 );
 434 #else
 435                 Debug( LDAP_DEBUG_ANY, "entry index delete failed!\n",
 436                         0, 0, 0 );
 437 #endif
 438                 text = "entry index delete failed";
 439                 rc = LDAP_OTHER;
 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 #if defined(LDAP_CLIENT_UPDATE) || defined(LDAP_SYNC)
 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, LDAP_PSEARCH_BY_DELETE );
 500                 }
 501         }
 502 #endif
 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 }