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( Operation *op, SlapReply *rs )
  18 {
  19         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
  20         Entry   *matched = NULL;
  21         struct berval   pdn = {0, NULL};
  22         Entry   *e = NULL;
  23         Entry   *p = NULL;
  24         EntryInfo       *ei = NULL, *eip = NULL;
  25         int             manageDSAit = get_manageDSAit( op );
  26         AttributeDescription *children = slap_schema.si_ad_children;
  27         AttributeDescription *entry = slap_schema.si_ad_entry;
  28         DB_TXN          *ltid = NULL, *lt2;
  29         struct bdb_op_info opinfo;
  30
  31         u_int32_t       locker = 0;
  32         DB_LOCK         lock, plock;
  33
  34         int             noop = 0;
  35
  36         int             num_retries = 0;
  37
  38 #ifdef LDAP_SYNC
  39         Operation* ps_list;
  40         int     rc;
  41         EntryInfo   *suffix_ei;
  42         Entry       *ctxcsn_e;
  43         int         ctxcsn_added = 0;
  44 #endif
  45
  46 #ifdef NEW_LOGGING
  47         LDAP_LOG ( OPERATION, ARGS,  "==> bdb_delete: %s\n", op->o_req_dn.bv_val, 0, 0 );
  48 #else
  49         Debug( LDAP_DEBUG_ARGS, "==> bdb_delete: %s\n",
  50                 op->o_req_dn.bv_val, 0, 0 );
  51 #endif
  52
  53         if( 0 ) {
  54 retry:  /* transaction retry */
  55                 if( e != NULL ) {
  56                         bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e);
  57                         e = NULL;
  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                 rs->sr_err = TXN_ABORT( ltid );
  67                 ltid = NULL;
  68                 op->o_private = NULL;
  69                 op->o_do_not_cache = opinfo.boi_acl_cache;
  70                 if( rs->sr_err != 0 ) {
  71                         rs->sr_err = LDAP_OTHER;
  72                         rs->sr_text = "internal error";
  73                         goto return_results;
  74                 }
  75                 bdb_trans_backoff( ++num_retries );
  76                 ldap_pvt_thread_yield();
  77         }
  78
  79         /* begin transaction */
  80         rs->sr_err = TXN_BEGIN( bdb->bi_dbenv, NULL, &ltid,
  81                 bdb->bi_db_opflags );
  82         rs->sr_text = NULL;
  83         if( rs->sr_err != 0 ) {
  84 #ifdef NEW_LOGGING
  85                 LDAP_LOG ( OPERATION, ERR,
  86                         "==> bdb_delete: txn_begin failed: %s (%d)\n",
  87                         db_strerror(rs->sr_err), rs->sr_err, 0 );
  88 #else
  89                 Debug( LDAP_DEBUG_TRACE,
  90                         "bdb_delete: txn_begin failed: %s (%d)\n",
  91                         db_strerror(rs->sr_err), rs->sr_err, 0 );
  92 #endif
  93                 rs->sr_err = LDAP_OTHER;
  94                 rs->sr_text = "internal error";
  95                 goto return_results;
  96         }
  97
  98         locker = TXN_ID ( ltid );
  99
 100         opinfo.boi_bdb = op->o_bd;
 101         opinfo.boi_txn = ltid;
 102         opinfo.boi_locker = locker;
 103         opinfo.boi_err = 0;
 104         opinfo.boi_acl_cache = op->o_do_not_cache;
 105         op->o_private = &opinfo;
 106
 107         if ( !be_issuffix( op->o_bd, &op->o_req_ndn ) ) {
 108                 dnParent( &op->o_req_ndn, &pdn );
 109         }
 110
 111         /* get entry */
 112         rs->sr_err = bdb_dn2entry( op, ltid, &op->o_req_ndn, &ei, 1,
 113                 locker, &lock );
 114
 115         switch( rs->sr_err ) {
 116         case 0:
 117         case DB_NOTFOUND:
 118                 break;
 119         case DB_LOCK_DEADLOCK:
 120         case DB_LOCK_NOTGRANTED:
 121                 goto retry;
 122         case LDAP_BUSY:
 123                 rs->sr_text = "ldap server busy";
 124                 goto return_results;
 125         default:
 126                 rs->sr_err = LDAP_OTHER;
 127                 rs->sr_text = "internal error";
 128                 goto return_results;
 129         }
 130
 131         if ( rs->sr_err == 0 ) {
 132                 e = ei->bei_e;
 133                 eip = ei->bei_parent;
 134                 bdb_cache_find_id( op, ltid, eip->bei_id, &eip,
 135                         0, locker, &plock );
 136         } else {
 137                 matched = ei->bei_e;
 138         }
 139         if ( eip ) {
 140                 p = eip->bei_e;
 141         }
 142
 143         if ( pdn.bv_len != 0 ) {
 144                 if( p == NULL || !bvmatch( &pdn, &p->e_nname )) {
 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                         rs->sr_err = LDAP_OTHER;
 154                         rs->sr_text = "could not locate parent of entry";
 155                         goto return_results;
 156                 }
 157
 158                 /* check parent for "children" acl */
 159                 rs->sr_err = access_allowed( 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                 if ( !rs->sr_err  ) {
 166                         switch( opinfo.boi_err ) {
 167                         case DB_LOCK_DEADLOCK:
 168                         case DB_LOCK_NOTGRANTED:
 169                                 goto retry;
 170                         }
 171
 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                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 181                         rs->sr_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( op->o_bd, &op->o_ndn ) ) {
 188                         if ( be_issuffix( op->o_bd, (struct berval *)&slap_empty_bv )
 189                                 || be_isupdate( op->o_bd, &op->o_ndn ) ) {
 190                                 p = (Entry *)&slap_entry_root;
 191
 192                                 /* check parent for "children" acl */
 193                                 rs->sr_err = access_allowed( op, p,
 194                                         children, NULL, ACL_WRITE, NULL );
 195
 196                                 p = NULL;
 197
 198                                 if ( !rs->sr_err  ) {
 199                                         switch( opinfo.boi_err ) {
 200                                         case DB_LOCK_DEADLOCK:
 201                                         case DB_LOCK_NOTGRANTED:
 202                                                 goto retry;
 203                                         }
 204
 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                                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 214                                         rs->sr_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                                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 228                                 goto return_results;
 229                         }
 230                 }
 231         }
 232
 233 #ifdef LDAP_SYNCREPL /* FIXME : dn2entry() should return non-glue entry */
 234         if ( e == NULL || ( !manageDSAit && is_entry_glue( e ))) {
 235 #else
 236         if ( e == NULL ) {
 237 #endif
 238 #ifdef NEW_LOGGING
 239                 LDAP_LOG ( OPERATION, ARGS,
 240                         "<=- bdb_delete: no such object %s\n", op->o_req_dn.bv_val, 0, 0);
 241 #else
 242                 Debug( LDAP_DEBUG_ARGS,
 243                         "<=- bdb_delete: no such object %s\n",
 244                         op->o_req_dn.bv_val, 0, 0);
 245 #endif
 246
 247                 if ( matched != NULL ) {
 248                         rs->sr_matched = ch_strdup( matched->e_dn );
 249                         rs->sr_ref = is_entry_referral( matched )
 250                                 ? get_entry_referrals( op, matched )
 251                                 : NULL;
 252                         bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, matched);
 253                         matched = NULL;
 254
 255                 } else {
 256 #ifdef LDAP_SYNCREPL
 257                         BerVarray deref = op->o_bd->syncinfo ?
 258                                                           op->o_bd->syncinfo->provideruri_bv : default_referral;
 259 #else
 260                         BerVarray deref = default_referral;
 261 #endif
 262                         rs->sr_ref = referral_rewrite( deref, NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 263                 }
 264
 265                 rs->sr_err = LDAP_REFERRAL;
 266                 send_ldap_result( op, rs );
 267
 268                 ber_bvarray_free( rs->sr_ref );
 269                 free( (char *)rs->sr_matched );
 270                 rs->sr_ref = NULL;
 271                 rs->sr_matched = NULL;
 272
 273                 rs->sr_err = -1;
 274                 goto done;
 275         }
 276
 277         if ( get_assert( op ) &&
 278                 ( test_filter( op, e, get_assertion( op )) != LDAP_COMPARE_TRUE ))
 279         {
 280                 rs->sr_err = LDAP_ASSERTION_FAILED;
 281                 goto return_results;
 282         }
 283
 284         rs->sr_err = access_allowed( op, e,
 285                 entry, NULL, ACL_WRITE, NULL );
 286
 287         if ( !rs->sr_err  ) {
 288                 switch( opinfo.boi_err ) {
 289                 case DB_LOCK_DEADLOCK:
 290                 case DB_LOCK_NOTGRANTED:
 291                         goto retry;
 292                 }
 293
 294 #ifdef NEW_LOGGING
 295                 LDAP_LOG ( OPERATION, DETAIL1,
 296                         "<=- bdb_delete: no write access to entry\n", 0, 0, 0 );
 297 #else
 298                 Debug( LDAP_DEBUG_TRACE,
 299                         "<=- bdb_delete: no write access to entry\n",
 300                         0, 0, 0 );
 301 #endif
 302                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 303                 rs->sr_text = "no write access to entry";
 304                 goto return_results;
 305         }
 306
 307         if ( !manageDSAit && is_entry_referral( e ) ) {
 308                 /* entry is a referral, don't allow delete */
 309                 rs->sr_ref = get_entry_referrals( op, e );
 310
 311 #ifdef NEW_LOGGING
 312                 LDAP_LOG ( OPERATION, DETAIL1,
 313                         "<=- bdb_delete: entry is referral\n", 0, 0, 0 );
 314 #else
 315                 Debug( LDAP_DEBUG_TRACE,
 316                         "bdb_delete: entry is referral\n", 0, 0, 0 );
 317 #endif
 318
 319                 rs->sr_err = LDAP_REFERRAL;
 320                 rs->sr_matched = e->e_name.bv_val;
 321                 send_ldap_result( op, rs );
 322
 323                 ber_bvarray_free( rs->sr_ref );
 324                 rs->sr_ref = NULL;
 325                 rs->sr_matched = NULL;
 326
 327                 rs->sr_err = 1;
 328                 goto done;
 329         }
 330
 331         /* nested transaction */
 332         rs->sr_err = TXN_BEGIN( bdb->bi_dbenv, ltid, &lt2,
 333                 bdb->bi_db_opflags );
 334         rs->sr_text = NULL;
 335         if( rs->sr_err != 0 ) {
 336 #ifdef NEW_LOGGING
 337                 LDAP_LOG ( OPERATION, ERR,
 338                         "bdb_delete: txn_begin(2) failed: %s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
 339 #else
 340                 Debug( LDAP_DEBUG_TRACE,
 341                         "bdb_delete: txn_begin(2) failed: %s (%d)\n",
 342                         db_strerror(rs->sr_err), rs->sr_err, 0 );
 343 #endif
 344                 rs->sr_err = LDAP_OTHER;
 345                 rs->sr_text = "internal error";
 346                 goto return_results;
 347         }
 348
 349         /* Can't do it if we have kids */
 350         rs->sr_err = bdb_cache_children( op, lt2, e );
 351         if( rs->sr_err != DB_NOTFOUND ) {
 352                 switch( rs->sr_err ) {
 353                 case DB_LOCK_DEADLOCK:
 354                 case DB_LOCK_NOTGRANTED:
 355                         goto retry;
 356                 case 0:
 357 #ifdef NEW_LOGGING
 358                         LDAP_LOG ( OPERATION, DETAIL1,
 359                                 "<=- bdb_delete: non-leaf %s\n", op->o_req_dn.bv_val, 0, 0 );
 360 #else
 361                         Debug(LDAP_DEBUG_ARGS,
 362                                 "<=- bdb_delete: non-leaf %s\n",
 363                                 op->o_req_dn.bv_val, 0, 0);
 364 #endif
 365                         rs->sr_err = LDAP_NOT_ALLOWED_ON_NONLEAF;
 366                         rs->sr_text = "subtree delete not supported";
 367                         break;
 368                 default:
 369 #ifdef NEW_LOGGING
 370                         LDAP_LOG ( OPERATION, ERR,
 371                                 "<=- bdb_delete: has_children failed %s (%d)\n",
 372                                 db_strerror(rs->sr_err), rs->sr_err, 0 );
 373 #else
 374                         Debug(LDAP_DEBUG_ARGS,
 375                                 "<=- bdb_delete: has_children failed: %s (%d)\n",
 376                                 db_strerror(rs->sr_err), rs->sr_err, 0 );
 377 #endif
 378                         rs->sr_err = LDAP_OTHER;
 379                         rs->sr_text = "internal error";
 380                 }
 381                 goto return_results;
 382         }
 383
 384         /* delete from dn2id */
 385         rs->sr_err = bdb_dn2id_delete( op, lt2, eip, e );
 386         if ( rs->sr_err != 0 ) {
 387 #ifdef NEW_LOGGING
 388                 LDAP_LOG ( OPERATION, ERR,
 389                         "<=- bdb_delete: dn2id failed: %s (%d)\n",
 390                         db_strerror(rs->sr_err), rs->sr_err, 0 );
 391 #else
 392                 Debug(LDAP_DEBUG_TRACE,
 393                         "<=- bdb_delete: dn2id failed: %s (%d)\n",
 394                         db_strerror(rs->sr_err), rs->sr_err, 0 );
 395 #endif
 396                 switch( rs->sr_err ) {
 397                 case DB_LOCK_DEADLOCK:
 398                 case DB_LOCK_NOTGRANTED:
 399                         goto retry;
 400                 }
 401                 rs->sr_text = "DN index delete failed";
 402                 rs->sr_err = LDAP_OTHER;
 403                 goto return_results;
 404         }
 405
 406         /* delete from id2entry */
 407         rs->sr_err = bdb_id2entry_delete( op->o_bd, lt2, e );
 408         if ( rs->sr_err != 0 ) {
 409 #ifdef NEW_LOGGING
 410                 LDAP_LOG ( OPERATION, ERR,
 411                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 412                         db_strerror(rs->sr_err), rs->sr_err, 0 );
 413 #else
 414                 Debug(LDAP_DEBUG_TRACE,
 415                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 416                         db_strerror(rs->sr_err), rs->sr_err, 0 );
 417 #endif
 418                 switch( rs->sr_err ) {
 419                 case DB_LOCK_DEADLOCK:
 420                 case DB_LOCK_NOTGRANTED:
 421                         goto retry;
 422                 }
 423                 rs->sr_text = "entry delete failed";
 424                 rs->sr_err = LDAP_OTHER;
 425                 goto return_results;
 426         }
 427
 428         /* delete indices for old attributes */
 429         rs->sr_err = bdb_index_entry_del( op, lt2, e );
 430         if ( rs->sr_err != LDAP_SUCCESS ) {
 431 #ifdef NEW_LOGGING
 432                 LDAP_LOG ( OPERATION, ERR,
 433                         "<=- bdb_delete: index failed: %s (%d)\n",
 434                         db_strerror(rs->sr_err), rs->sr_err, 0 );
 435 #else
 436                 Debug( LDAP_DEBUG_TRACE,
 437                         "<=- bdb_delete: index failed: %s (%d)\n",
 438                         db_strerror(rs->sr_err), rs->sr_err, 0 );
 439 #endif
 440                 switch( rs->sr_err ) {
 441                 case DB_LOCK_DEADLOCK:
 442                 case DB_LOCK_NOTGRANTED:
 443                         goto retry;
 444                 }
 445                 rs->sr_text = "entry index delete failed";
 446                 rs->sr_err = LDAP_OTHER;
 447                 goto return_results;
 448         }
 449         if ( TXN_COMMIT( lt2, 0 ) != 0 ) {
 450                 rs->sr_err = LDAP_OTHER;
 451                 rs->sr_text = "txn_commit(2) failed";
 452                 goto return_results;
 453         }
 454
 455 #if 0   /* Do we want to reclaim deleted IDs? */
 456         ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
 457         if ( e->e_id == bdb->bi_lastid ) {
 458                 bdb_last_id( op->o_bd, ltid );
 459         }
 460         ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
 461 #endif
 462
 463 #ifdef LDAP_SYNC
 464         rc = bdb_csn_commit( op, rs, ltid, ei, &suffix_ei, &ctxcsn_e, &ctxcsn_added, locker );
 465         switch ( rc ) {
 466         case BDB_CSN_ABORT :
 467                 goto return_results;
 468         case BDB_CSN_RETRY :
 469                 goto retry;
 470         }
 471 #endif
 472
 473         if( op->o_noop ) {
 474                 if ( ( rs->sr_err = TXN_ABORT( ltid ) ) != 0 ) {
 475                         rs->sr_text = "txn_abort (no-op) failed";
 476                 } else {
 477                         noop = 1;
 478                         rs->sr_err = LDAP_SUCCESS;
 479                 }
 480         } else {
 481 #ifdef LDAP_SYNC
 482                 struct berval ctx_nrdn;
 483 #endif
 484
 485                 bdb_cache_delete( &bdb->bi_cache, e, bdb->bi_dbenv,
 486                         locker, &lock );
 487
 488 #ifdef LDAP_SYNC
 489                 if ( ctxcsn_added ) {
 490                         ctx_nrdn.bv_val = "cn=ldapsync";
 491                         ctx_nrdn.bv_len = strlen( ctx_nrdn.bv_val );
 492                         bdb_cache_add( bdb, suffix_ei, ctxcsn_e, &ctx_nrdn, locker );
 493                 }
 494 #endif
 495
 496                 rs->sr_err = TXN_COMMIT( ltid, 0 );
 497         }
 498         ltid = NULL;
 499         op->o_private = NULL;
 500
 501         if( rs->sr_err != 0 ) {
 502 #ifdef NEW_LOGGING
 503                 LDAP_LOG ( OPERATION, ERR,
 504                         "bdb_delete: txn_%s failed: %s (%d)\n",
 505                         op->o_noop ? "abort (no-op)" : "commit", db_strerror(rs->sr_err), rs->sr_err );
 506 #else
 507                 Debug( LDAP_DEBUG_TRACE,
 508                         "bdb_delete: txn_%s failed: %s (%d)\n",
 509                         op->o_noop ? "abort (no-op)" : "commit",
 510                         db_strerror(rs->sr_err), rs->sr_err );
 511 #endif
 512                 rs->sr_err = LDAP_OTHER;
 513                 rs->sr_text = "commit failed";
 514
 515         } else {
 516 #ifdef NEW_LOGGING
 517                 LDAP_LOG ( OPERATION, RESULTS,
 518                         "bdb_delete: deleted%s id=%08lx db=\"%s\"\n",
 519                         op->o_noop ? " (no-op)" : "", e->e_id, e->e_dn );
 520 #else
 521                 Debug( LDAP_DEBUG_TRACE,
 522                         "bdb_delete: deleted%s id=%08lx dn=\"%s\"\n",
 523                         op->o_noop ? " (no-op)" : "",
 524                         e->e_id, e->e_dn );
 525 #endif
 526                 rs->sr_err = LDAP_SUCCESS;
 527                 rs->sr_text = NULL;
 528         }
 529
 530 return_results:
 531         send_ldap_result( op, rs );
 532
 533 #ifdef LDAP_SYNC
 534         if ( rs->sr_err == LDAP_SUCCESS && !noop ) {
 535                 LDAP_LIST_FOREACH( ps_list, &bdb->bi_psearch_list, o_ps_link ) {
 536                         bdb_psearch( op, rs, ps_list, e, LDAP_PSEARCH_BY_DELETE );
 537                 }
 538         }
 539 #endif
 540
 541         if(rs->sr_err == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 542                 ldap_pvt_thread_yield();
 543                 TXN_CHECKPOINT( bdb->bi_dbenv,
 544                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 545         }
 546
 547 done:
 548         /* free entry */
 549         if( e != NULL ) {
 550                 if ( rs->sr_err == LDAP_SUCCESS ) {
 551                         /* Free the EntryInfo and the Entry */
 552                         bdb_cache_delete_cleanup( e );
 553                 } else {
 554                         bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e);
 555                 }
 556         }
 557
 558         if( ltid != NULL ) {
 559                 TXN_ABORT( ltid );
 560                 op->o_private = NULL;
 561         }
 562
 563         return ( ( rs->sr_err == LDAP_SUCCESS ) ? noop : rs->sr_err );
 564 }