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

   1 /* delete.c - bdb backend delete routine */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2000-2006 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16
  17 #include "portable.h"
  18
  19 #include <stdio.h>
  20 #include <ac/string.h>
  21
  22 #include "lutil.h"
  23 #include "back-bdb.h"
  24
  25 int
  26 bdb_delete( Operation *op, SlapReply *rs )
  27 {
  28         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
  29         Entry   *matched = NULL;
  30         struct berval   pdn = {0, NULL};
  31         Entry   *e = NULL;
  32         Entry   *p = NULL;
  33         EntryInfo       *ei = NULL, *eip = NULL;
  34         int             manageDSAit = get_manageDSAit( op );
  35         AttributeDescription *children = slap_schema.si_ad_children;
  36         AttributeDescription *entry = slap_schema.si_ad_entry;
  37         DB_TXN          *ltid = NULL, *lt2;
  38         struct bdb_op_info opinfo = {0};
  39         ID      eid;
  40
  41         u_int32_t       locker = 0;
  42         DB_LOCK         lock, plock;
  43
  44         int             num_retries = 0;
  45
  46         int     rc;
  47
  48         LDAPControl **preread_ctrl = NULL;
  49         LDAPControl *ctrls[SLAP_MAX_RESPONSE_CONTROLS];
  50         int num_ctrls = 0;
  51
  52         int     parent_is_glue = 0;
  53         int parent_is_leaf = 0;
  54
  55         ctrls[num_ctrls] = 0;
  56
  57         Debug( LDAP_DEBUG_ARGS, "==> " LDAP_XSTRING(bdb_delete) ": %s\n",
  58                 op->o_req_dn.bv_val, 0, 0 );
  59
  60         /* allocate CSN */
  61         if ( !SLAP_SHADOW( op->o_bd )) {
  62                 struct berval csn;
  63                 char csnbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
  64
  65                 csn.bv_val = csnbuf;
  66                 csn.bv_len = sizeof(csnbuf);
  67                 slap_get_csn( op, &csn, 1 );
  68         }
  69
  70         if( 0 ) {
  71 retry:  /* transaction retry */
  72                 if( e != NULL ) {
  73                         bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e);
  74                         e = NULL;
  75                 }
  76                 if( p != NULL ) {
  77                         bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p);
  78                         p = NULL;
  79                 }
  80                 Debug( LDAP_DEBUG_TRACE,
  81                         "==> " LDAP_XSTRING(bdb_delete) ": retrying...\n",
  82                         0, 0, 0 );
  83                 rs->sr_err = TXN_ABORT( ltid );
  84                 ltid = NULL;
  85                 op->o_private = NULL;
  86                 op->o_do_not_cache = opinfo.boi_acl_cache;
  87                 if( rs->sr_err != 0 ) {
  88                         rs->sr_err = LDAP_OTHER;
  89                         rs->sr_text = "internal error";
  90                         goto return_results;
  91                 }
  92                 if ( op->o_abandon ) {
  93                         rs->sr_err = SLAPD_ABANDON;
  94                         goto return_results;
  95                 }
  96                 parent_is_glue = 0;
  97                 parent_is_leaf = 0;
  98                 ldap_pvt_thread_yield();
  99                 bdb_trans_backoff( ++num_retries );
 100         }
 101
 102         /* begin transaction */
 103         rs->sr_err = TXN_BEGIN( bdb->bi_dbenv, NULL, &ltid,
 104                 bdb->bi_db_opflags );
 105         rs->sr_text = NULL;
 106         if( rs->sr_err != 0 ) {
 107                 Debug( LDAP_DEBUG_TRACE,
 108                         LDAP_XSTRING(bdb_delete) ": txn_begin failed: "
 109                         "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
 110                 rs->sr_err = LDAP_OTHER;
 111                 rs->sr_text = "internal error";
 112                 goto return_results;
 113         }
 114
 115         locker = TXN_ID ( ltid );
 116
 117         opinfo.boi_bdb = op->o_bd;
 118         opinfo.boi_txn = ltid;
 119         opinfo.boi_locker = locker;
 120         opinfo.boi_err = 0;
 121         opinfo.boi_acl_cache = op->o_do_not_cache;
 122         op->o_private = &opinfo;
 123
 124         if ( !be_issuffix( op->o_bd, &op->o_req_ndn ) ) {
 125                 dnParent( &op->o_req_ndn, &pdn );
 126         }
 127
 128         /* get entry */
 129         rs->sr_err = bdb_dn2entry( op, ltid, &op->o_req_ndn, &ei, 1,
 130                 locker, &lock );
 131
 132         switch( rs->sr_err ) {
 133         case 0:
 134         case DB_NOTFOUND:
 135                 break;
 136         case DB_LOCK_DEADLOCK:
 137         case DB_LOCK_NOTGRANTED:
 138                 goto retry;
 139         case LDAP_BUSY:
 140                 rs->sr_text = "ldap server busy";
 141                 goto return_results;
 142         default:
 143                 rs->sr_err = LDAP_OTHER;
 144                 rs->sr_text = "internal error";
 145                 goto return_results;
 146         }
 147
 148         if ( rs->sr_err == 0 ) {
 149                 e = ei->bei_e;
 150                 eip = ei->bei_parent;
 151         } else {
 152                 matched = ei->bei_e;
 153         }
 154
 155         /* FIXME : dn2entry() should return non-glue entry */
 156         if ( e == NULL || ( !manageDSAit && is_entry_glue( e ))) {
 157                 Debug( LDAP_DEBUG_ARGS,
 158                         "<=- " LDAP_XSTRING(bdb_delete) ": no such object %s\n",
 159                         op->o_req_dn.bv_val, 0, 0);
 160
 161                 if ( matched != NULL ) {
 162                         rs->sr_matched = ch_strdup( matched->e_dn );
 163                         rs->sr_ref = is_entry_referral( matched )
 164                                 ? get_entry_referrals( op, matched )
 165                                 : NULL;
 166                         bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, matched);
 167                         matched = NULL;
 168
 169                 } else {
 170                         rs->sr_ref = referral_rewrite( default_referral, NULL,
 171                                         &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 172                 }
 173
 174                 rs->sr_err = LDAP_REFERRAL;
 175                 rs->sr_flags = REP_MATCHED_MUSTBEFREED | REP_REF_MUSTBEFREED;
 176                 goto return_results;
 177         }
 178
 179         rc = bdb_cache_find_id( op, ltid, eip->bei_id, &eip, 0, locker, &plock );
 180         switch( rc ) {
 181         case DB_LOCK_DEADLOCK:
 182         case DB_LOCK_NOTGRANTED:
 183                 goto retry;
 184         case 0:
 185         case DB_NOTFOUND:
 186                 break;
 187         default:
 188                 rs->sr_err = LDAP_OTHER;
 189                 rs->sr_text = "internal error";
 190                 goto return_results;
 191         }
 192         if ( eip ) p = eip->bei_e;
 193
 194         if ( pdn.bv_len != 0 ) {
 195                 if( p == NULL || !bvmatch( &pdn, &p->e_nname )) {
 196                         Debug( LDAP_DEBUG_TRACE,
 197                                 "<=- " LDAP_XSTRING(bdb_delete) ": parent "
 198                                 "does not exist\n", 0, 0, 0 );
 199                         rs->sr_err = LDAP_OTHER;
 200                         rs->sr_text = "could not locate parent of entry";
 201                         goto return_results;
 202                 }
 203
 204                 /* check parent for "children" acl */
 205                 rs->sr_err = access_allowed( op, p,
 206                         children, NULL, ACL_WDEL, NULL );
 207
 208                 if ( !rs->sr_err  ) {
 209                         switch( opinfo.boi_err ) {
 210                         case DB_LOCK_DEADLOCK:
 211                         case DB_LOCK_NOTGRANTED:
 212                                 goto retry;
 213                         }
 214
 215                         Debug( LDAP_DEBUG_TRACE,
 216                                 "<=- " LDAP_XSTRING(bdb_delete) ": no write "
 217                                 "access to parent\n", 0, 0, 0 );
 218                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 219                         rs->sr_text = "no write access to parent";
 220                         goto return_results;
 221                 }
 222
 223         } else {
 224                 /* no parent, must be root to delete */
 225                 if( ! be_isroot( op ) ) {
 226                         if ( be_issuffix( op->o_bd, (struct berval *)&slap_empty_bv )
 227                                 || be_shadow_update( op ) ) {
 228                                 p = (Entry *)&slap_entry_root;
 229
 230                                 /* check parent for "children" acl */
 231                                 rs->sr_err = access_allowed( op, p,
 232                                         children, NULL, ACL_WDEL, NULL );
 233
 234                                 p = NULL;
 235
 236                                 if ( !rs->sr_err  ) {
 237                                         switch( opinfo.boi_err ) {
 238                                         case DB_LOCK_DEADLOCK:
 239                                         case DB_LOCK_NOTGRANTED:
 240                                                 goto retry;
 241                                         }
 242
 243                                         Debug( LDAP_DEBUG_TRACE,
 244                                                 "<=- " LDAP_XSTRING(bdb_delete)
 245                                                 ": no access to parent\n",
 246                                                 0, 0, 0 );
 247                                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 248                                         rs->sr_text = "no write access to parent";
 249                                         goto return_results;
 250                                 }
 251
 252                         } else {
 253                                 Debug( LDAP_DEBUG_TRACE,
 254                                         "<=- " LDAP_XSTRING(bdb_delete)
 255                                         ": no parent and not root\n", 0, 0, 0 );
 256                                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 257                                 goto return_results;
 258                         }
 259                 }
 260         }
 261
 262         if ( get_assert( op ) &&
 263                 ( test_filter( op, e, get_assertion( op )) != LDAP_COMPARE_TRUE ))
 264         {
 265                 rs->sr_err = LDAP_ASSERTION_FAILED;
 266                 goto return_results;
 267         }
 268
 269         rs->sr_err = access_allowed( op, e,
 270                 entry, NULL, ACL_WDEL, NULL );
 271
 272         if ( !rs->sr_err  ) {
 273                 switch( opinfo.boi_err ) {
 274                 case DB_LOCK_DEADLOCK:
 275                 case DB_LOCK_NOTGRANTED:
 276                         goto retry;
 277                 }
 278
 279                 Debug( LDAP_DEBUG_TRACE,
 280                         "<=- " LDAP_XSTRING(bdb_delete) ": no write access "
 281                         "to entry\n", 0, 0, 0 );
 282                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 283                 rs->sr_text = "no write access to entry";
 284                 goto return_results;
 285         }
 286
 287         if ( !manageDSAit && is_entry_referral( e ) ) {
 288                 /* entry is a referral, don't allow delete */
 289                 rs->sr_ref = get_entry_referrals( op, e );
 290
 291                 Debug( LDAP_DEBUG_TRACE,
 292                         LDAP_XSTRING(bdb_delete) ": entry is referral\n",
 293                         0, 0, 0 );
 294
 295                 rs->sr_err = LDAP_REFERRAL;
 296                 rs->sr_matched = ch_strdup( e->e_name.bv_val );
 297                 rs->sr_flags = REP_MATCHED_MUSTBEFREED | REP_REF_MUSTBEFREED;
 298                 goto return_results;
 299         }
 300
 301         /* pre-read */
 302         if( op->o_preread ) {
 303                 if( preread_ctrl == NULL ) {
 304                         preread_ctrl = &ctrls[num_ctrls++];
 305                         ctrls[num_ctrls] = NULL;
 306                 }
 307                 if( slap_read_controls( op, rs, e,
 308                         &slap_pre_read_bv, preread_ctrl ) )
 309                 {
 310                         Debug( LDAP_DEBUG_TRACE,
 311                                 "<=- " LDAP_XSTRING(bdb_delete) ": pre-read "
 312                                 "failed!\n", 0, 0, 0 );
 313                         goto return_results;
 314                 }
 315         }
 316
 317         /* nested transaction */
 318         rs->sr_err = TXN_BEGIN( bdb->bi_dbenv, ltid, &lt2,
 319                 bdb->bi_db_opflags );
 320         rs->sr_text = NULL;
 321         if( rs->sr_err != 0 ) {
 322                 Debug( LDAP_DEBUG_TRACE,
 323                         LDAP_XSTRING(bdb_delete) ": txn_begin(2) failed: "
 324                         "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
 325                 rs->sr_err = LDAP_OTHER;
 326                 rs->sr_text = "internal error";
 327                 goto return_results;
 328         }
 329
 330         /* Can't do it if we have kids */
 331         rs->sr_err = bdb_cache_children( op, lt2, e );
 332         if( rs->sr_err != DB_NOTFOUND ) {
 333                 switch( rs->sr_err ) {
 334                 case DB_LOCK_DEADLOCK:
 335                 case DB_LOCK_NOTGRANTED:
 336                         goto retry;
 337                 case 0:
 338                         Debug(LDAP_DEBUG_ARGS,
 339                                 "<=- " LDAP_XSTRING(bdb_delete)
 340                                 ": non-leaf %s\n",
 341                                 op->o_req_dn.bv_val, 0, 0);
 342                         rs->sr_err = LDAP_NOT_ALLOWED_ON_NONLEAF;
 343                         rs->sr_text = "subordinate objects must be deleted first";
 344                         break;
 345                 default:
 346                         Debug(LDAP_DEBUG_ARGS,
 347                                 "<=- " LDAP_XSTRING(bdb_delete)
 348                                 ": has_children failed: %s (%d)\n",
 349                                 db_strerror(rs->sr_err), rs->sr_err, 0 );
 350                         rs->sr_err = LDAP_OTHER;
 351                         rs->sr_text = "internal error";
 352                 }
 353                 goto return_results;
 354         }
 355
 356         /* delete from dn2id */
 357         rs->sr_err = bdb_dn2id_delete( op, lt2, eip, e );
 358         if ( rs->sr_err != 0 ) {
 359                 Debug(LDAP_DEBUG_TRACE,
 360                         "<=- " LDAP_XSTRING(bdb_delete) ": dn2id failed: "
 361                         "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
 362                 switch( rs->sr_err ) {
 363                 case DB_LOCK_DEADLOCK:
 364                 case DB_LOCK_NOTGRANTED:
 365                         goto retry;
 366                 }
 367                 rs->sr_text = "DN index delete failed";
 368                 rs->sr_err = LDAP_OTHER;
 369                 goto return_results;
 370         }
 371
 372         /* delete indices for old attributes */
 373         rs->sr_err = bdb_index_entry_del( op, lt2, e );
 374         if ( rs->sr_err != LDAP_SUCCESS ) {
 375                 Debug(LDAP_DEBUG_TRACE,
 376                         "<=- " LDAP_XSTRING(bdb_delete) ": index failed: "
 377                         "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
 378                 switch( rs->sr_err ) {
 379                 case DB_LOCK_DEADLOCK:
 380                 case DB_LOCK_NOTGRANTED:
 381                         goto retry;
 382                 }
 383                 rs->sr_text = "entry index delete failed";
 384                 rs->sr_err = LDAP_OTHER;
 385                 goto return_results;
 386         }
 387
 388         /* fixup delete CSN */
 389         if ( !SLAP_SHADOW( op->o_bd )) {
 390                 struct berval vals[2];
 391
 392                 assert( !BER_BVISNULL( &op->o_csn ) );
 393                 vals[0] = op->o_csn;
 394                 BER_BVZERO( &vals[1] );
 395                 rs->sr_err = bdb_index_values( op, lt2, slap_schema.si_ad_entryCSN,
 396                         vals, 0, SLAP_INDEX_ADD_OP );
 397         if ( rs->sr_err != LDAP_SUCCESS ) {
 398                         switch( rs->sr_err ) {
 399                         case DB_LOCK_DEADLOCK:
 400                         case DB_LOCK_NOTGRANTED:
 401                                 goto retry;
 402                         }
 403                         rs->sr_text = "entryCSN index update failed";
 404                         rs->sr_err = LDAP_OTHER;
 405                         goto return_results;
 406                 }
 407         }
 408
 409         /* delete from id2entry */
 410         rs->sr_err = bdb_id2entry_delete( op->o_bd, lt2, e );
 411         if ( rs->sr_err != 0 ) {
 412                 Debug( LDAP_DEBUG_TRACE,
 413                         "<=- " LDAP_XSTRING(bdb_delete) ": id2entry failed: "
 414                         "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
 415                 switch( rs->sr_err ) {
 416                 case DB_LOCK_DEADLOCK:
 417                 case DB_LOCK_NOTGRANTED:
 418                         goto retry;
 419                 }
 420                 rs->sr_text = "entry delete failed";
 421                 rs->sr_err = LDAP_OTHER;
 422                 goto return_results;
 423         }
 424
 425         if ( pdn.bv_len != 0 ) {
 426                 parent_is_glue = is_entry_glue(p);
 427                 rs->sr_err = bdb_cache_children( op, lt2, p );
 428                 if ( rs->sr_err != DB_NOTFOUND ) {
 429                         switch( rs->sr_err ) {
 430                         case DB_LOCK_DEADLOCK:
 431                         case DB_LOCK_NOTGRANTED:
 432                                 goto retry;
 433                         case 0:
 434                                 break;
 435                         default:
 436                                 Debug(LDAP_DEBUG_ARGS,
 437                                         "<=- " LDAP_XSTRING(bdb_delete)
 438                                         ": has_children failed: %s (%d)\n",
 439                                         db_strerror(rs->sr_err), rs->sr_err, 0 );
 440                                 rs->sr_err = LDAP_OTHER;
 441                                 rs->sr_text = "internal error";
 442                                 goto return_results;
 443                         }
 444                         parent_is_leaf = 1;
 445                 }
 446                 bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p);
 447                 p = NULL;
 448         }
 449
 450         if ( TXN_COMMIT( lt2, 0 ) != 0 ) {
 451                 rs->sr_err = LDAP_OTHER;
 452                 rs->sr_text = "txn_commit(2) failed";
 453                 goto return_results;
 454         }
 455
 456         eid = e->e_id;
 457
 458 #if 0   /* Do we want to reclaim deleted IDs? */
 459         ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
 460         if ( e->e_id == bdb->bi_lastid ) {
 461                 bdb_last_id( op->o_bd, ltid );
 462         }
 463         ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
 464 #endif
 465
 466         if( op->o_noop ) {
 467                 if ( ( rs->sr_err = TXN_ABORT( ltid ) ) != 0 ) {
 468                         rs->sr_text = "txn_abort (no-op) failed";
 469                 } else {
 470                         rs->sr_err = LDAP_X_NO_OPERATION;
 471                         ltid = NULL;
 472                         goto return_results;
 473                 }
 474         } else {
 475                 rc = bdb_cache_delete( &bdb->bi_cache, e, bdb->bi_dbenv,
 476                         locker, &lock );
 477                 switch( rc ) {
 478                 case DB_LOCK_DEADLOCK:
 479                 case DB_LOCK_NOTGRANTED:
 480                         goto retry;
 481                 }
 482
 483                 rs->sr_err = TXN_COMMIT( ltid, 0 );
 484         }
 485         ltid = NULL;
 486         op->o_private = NULL;
 487
 488         if( rs->sr_err != 0 ) {
 489                 Debug( LDAP_DEBUG_TRACE,
 490                         LDAP_XSTRING(bdb_delete) ": txn_%s failed: %s (%d)\n",
 491                         op->o_noop ? "abort (no-op)" : "commit",
 492                         db_strerror(rs->sr_err), rs->sr_err );
 493                 rs->sr_err = LDAP_OTHER;
 494                 rs->sr_text = "commit failed";
 495
 496                 goto return_results;
 497         }
 498
 499         Debug( LDAP_DEBUG_TRACE,
 500                 LDAP_XSTRING(bdb_delete) ": deleted%s id=%08lx dn=\"%s\"\n",
 501                 op->o_noop ? " (no-op)" : "",
 502                 eid, op->o_req_dn.bv_val );
 503         rs->sr_err = LDAP_SUCCESS;
 504         rs->sr_text = NULL;
 505         if( num_ctrls ) rs->sr_ctrls = ctrls;
 506
 507 return_results:
 508         if ( rs->sr_err == LDAP_SUCCESS && parent_is_glue && parent_is_leaf ) {
 509                 op->o_delete_glue_parent = 1;
 510         }
 511
 512         if ( p )
 513                 bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p);
 514
 515         /* free entry */
 516         if( e != NULL ) {
 517                 if ( rs->sr_err == LDAP_SUCCESS ) {
 518                         /* Free the EntryInfo and the Entry */
 519                         bdb_cache_delete_cleanup( &bdb->bi_cache, BEI(e) );
 520                 } else {
 521                         bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e);
 522                 }
 523         }
 524
 525         if( ltid != NULL ) {
 526                 TXN_ABORT( ltid );
 527         }
 528         op->o_private = NULL;
 529
 530         send_ldap_result( op, rs );
 531         if ( !SLAP_SHADOW( op->o_bd ))
 532                 slap_graduate_commit_csn( op );
 533
 534         if( preread_ctrl != NULL ) {
 535                 slap_sl_free( (*preread_ctrl)->ldctl_value.bv_val, op->o_tmpmemctx );
 536                 slap_sl_free( *preread_ctrl, op->o_tmpmemctx );
 537         }
 538
 539         if( rs->sr_err == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 540                 ldap_pvt_thread_yield();
 541                 TXN_CHECKPOINT( bdb->bi_dbenv,
 542                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 543         }
 544         return rs->sr_err;
 545 }