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                 bdb_trans_backoff( ++num_retries );
  99         }
 100
 101         /* begin transaction */
 102         rs->sr_err = TXN_BEGIN( bdb->bi_dbenv, NULL, &ltid,
 103                 bdb->bi_db_opflags );
 104         rs->sr_text = NULL;
 105         if( rs->sr_err != 0 ) {
 106                 Debug( LDAP_DEBUG_TRACE,
 107                         LDAP_XSTRING(bdb_delete) ": txn_begin failed: "
 108                         "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
 109                 rs->sr_err = LDAP_OTHER;
 110                 rs->sr_text = "internal error";
 111                 goto return_results;
 112         }
 113
 114         locker = TXN_ID ( ltid );
 115
 116         opinfo.boi_bdb = op->o_bd;
 117         opinfo.boi_txn = ltid;
 118         opinfo.boi_locker = locker;
 119         opinfo.boi_err = 0;
 120         opinfo.boi_acl_cache = op->o_do_not_cache;
 121         op->o_private = &opinfo;
 122
 123         if ( !be_issuffix( op->o_bd, &op->o_req_ndn ) ) {
 124                 dnParent( &op->o_req_ndn, &pdn );
 125         }
 126
 127         /* get entry */
 128         rs->sr_err = bdb_dn2entry( op, ltid, &op->o_req_ndn, &ei, 1,
 129                 locker, &lock );
 130
 131         switch( rs->sr_err ) {
 132         case 0:
 133         case DB_NOTFOUND:
 134                 break;
 135         case DB_LOCK_DEADLOCK:
 136         case DB_LOCK_NOTGRANTED:
 137                 goto retry;
 138         case LDAP_BUSY:
 139                 rs->sr_text = "ldap server busy";
 140                 goto return_results;
 141         default:
 142                 rs->sr_err = LDAP_OTHER;
 143                 rs->sr_text = "internal error";
 144                 goto return_results;
 145         }
 146
 147         if ( rs->sr_err == 0 ) {
 148                 e = ei->bei_e;
 149                 eip = ei->bei_parent;
 150         } else {
 151                 matched = ei->bei_e;
 152         }
 153
 154         /* FIXME : dn2entry() should return non-glue entry */
 155         if ( e == NULL || ( !manageDSAit && is_entry_glue( e ))) {
 156                 Debug( LDAP_DEBUG_ARGS,
 157                         "<=- " LDAP_XSTRING(bdb_delete) ": no such object %s\n",
 158                         op->o_req_dn.bv_val, 0, 0);
 159
 160                 if ( matched != NULL ) {
 161                         rs->sr_matched = ch_strdup( matched->e_dn );
 162                         rs->sr_ref = is_entry_referral( matched )
 163                                 ? get_entry_referrals( op, matched )
 164                                 : NULL;
 165                         bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, matched);
 166                         matched = NULL;
 167
 168                 } else {
 169                         rs->sr_ref = referral_rewrite( default_referral, NULL,
 170                                         &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 171                 }
 172
 173                 rs->sr_err = LDAP_REFERRAL;
 174                 rs->sr_flags = REP_MATCHED_MUSTBEFREED | REP_REF_MUSTBEFREED;
 175                 goto return_results;
 176         }
 177
 178         rc = bdb_cache_find_id( op, ltid, eip->bei_id, &eip, 0, locker, &plock );
 179         switch( rc ) {
 180         case DB_LOCK_DEADLOCK:
 181         case DB_LOCK_NOTGRANTED:
 182                 goto retry;
 183         case 0:
 184         case DB_NOTFOUND:
 185                 break;
 186         default:
 187                 rs->sr_err = LDAP_OTHER;
 188                 rs->sr_text = "internal error";
 189                 goto return_results;
 190         }
 191         if ( eip ) p = eip->bei_e;
 192
 193         if ( pdn.bv_len != 0 ) {
 194                 if( p == NULL || !bvmatch( &pdn, &p->e_nname )) {
 195                         Debug( LDAP_DEBUG_TRACE,
 196                                 "<=- " LDAP_XSTRING(bdb_delete) ": parent "
 197                                 "does not exist\n", 0, 0, 0 );
 198                         rs->sr_err = LDAP_OTHER;
 199                         rs->sr_text = "could not locate parent of entry";
 200                         goto return_results;
 201                 }
 202
 203                 /* check parent for "children" acl */
 204                 rs->sr_err = access_allowed( op, p,
 205                         children, NULL, ACL_WDEL, NULL );
 206
 207                 if ( !rs->sr_err  ) {
 208                         switch( opinfo.boi_err ) {
 209                         case DB_LOCK_DEADLOCK:
 210                         case DB_LOCK_NOTGRANTED:
 211                                 goto retry;
 212                         }
 213
 214                         Debug( LDAP_DEBUG_TRACE,
 215                                 "<=- " LDAP_XSTRING(bdb_delete) ": no write "
 216                                 "access to parent\n", 0, 0, 0 );
 217                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 218                         rs->sr_text = "no write access to parent";
 219                         goto return_results;
 220                 }
 221
 222         } else {
 223                 /* no parent, must be root to delete */
 224                 if( ! be_isroot( op ) ) {
 225                         if ( be_issuffix( op->o_bd, (struct berval *)&slap_empty_bv )
 226                                 || be_shadow_update( op ) ) {
 227                                 p = (Entry *)&slap_entry_root;
 228
 229                                 /* check parent for "children" acl */
 230                                 rs->sr_err = access_allowed( op, p,
 231                                         children, NULL, ACL_WDEL, NULL );
 232
 233                                 p = NULL;
 234
 235                                 if ( !rs->sr_err  ) {
 236                                         switch( opinfo.boi_err ) {
 237                                         case DB_LOCK_DEADLOCK:
 238                                         case DB_LOCK_NOTGRANTED:
 239                                                 goto retry;
 240                                         }
 241
 242                                         Debug( LDAP_DEBUG_TRACE,
 243                                                 "<=- " LDAP_XSTRING(bdb_delete)
 244                                                 ": no access to parent\n",
 245                                                 0, 0, 0 );
 246                                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 247                                         rs->sr_text = "no write access to parent";
 248                                         goto return_results;
 249                                 }
 250
 251                         } else {
 252                                 Debug( LDAP_DEBUG_TRACE,
 253                                         "<=- " LDAP_XSTRING(bdb_delete)
 254                                         ": no parent and not root\n", 0, 0, 0 );
 255                                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 256                                 goto return_results;
 257                         }
 258                 }
 259         }
 260
 261         if ( get_assert( op ) &&
 262                 ( test_filter( op, e, get_assertion( op )) != LDAP_COMPARE_TRUE ))
 263         {
 264                 rs->sr_err = LDAP_ASSERTION_FAILED;
 265                 goto return_results;
 266         }
 267
 268         rs->sr_err = access_allowed( op, e,
 269                 entry, NULL, ACL_WDEL, NULL );
 270
 271         if ( !rs->sr_err  ) {
 272                 switch( opinfo.boi_err ) {
 273                 case DB_LOCK_DEADLOCK:
 274                 case DB_LOCK_NOTGRANTED:
 275                         goto retry;
 276                 }
 277
 278                 Debug( LDAP_DEBUG_TRACE,
 279                         "<=- " LDAP_XSTRING(bdb_delete) ": no write access "
 280                         "to entry\n", 0, 0, 0 );
 281                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 282                 rs->sr_text = "no write access to entry";
 283                 goto return_results;
 284         }
 285
 286         if ( !manageDSAit && is_entry_referral( e ) ) {
 287                 /* entry is a referral, don't allow delete */
 288                 rs->sr_ref = get_entry_referrals( op, e );
 289
 290                 Debug( LDAP_DEBUG_TRACE,
 291                         LDAP_XSTRING(bdb_delete) ": entry is referral\n",
 292                         0, 0, 0 );
 293
 294                 rs->sr_err = LDAP_REFERRAL;
 295                 rs->sr_matched = ch_strdup( e->e_name.bv_val );
 296                 rs->sr_flags = REP_MATCHED_MUSTBEFREED | REP_REF_MUSTBEFREED;
 297                 goto return_results;
 298         }
 299
 300         /* pre-read */
 301         if( op->o_preread ) {
 302                 if( preread_ctrl == NULL ) {
 303                         preread_ctrl = &ctrls[num_ctrls++];
 304                         ctrls[num_ctrls] = NULL;
 305                 }
 306                 if( slap_read_controls( op, rs, e,
 307                         &slap_pre_read_bv, preread_ctrl ) )
 308                 {
 309                         Debug( LDAP_DEBUG_TRACE,
 310                                 "<=- " LDAP_XSTRING(bdb_delete) ": pre-read "
 311                                 "failed!\n", 0, 0, 0 );
 312                         goto return_results;
 313                 }
 314         }
 315
 316         /* nested transaction */
 317         rs->sr_err = TXN_BEGIN( bdb->bi_dbenv, ltid, &lt2,
 318                 bdb->bi_db_opflags );
 319         rs->sr_text = NULL;
 320         if( rs->sr_err != 0 ) {
 321                 Debug( LDAP_DEBUG_TRACE,
 322                         LDAP_XSTRING(bdb_delete) ": txn_begin(2) failed: "
 323                         "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
 324                 rs->sr_err = LDAP_OTHER;
 325                 rs->sr_text = "internal error";
 326                 goto return_results;
 327         }
 328
 329         /* Can't do it if we have kids */
 330         rs->sr_err = bdb_cache_children( op, lt2, e );
 331         if( rs->sr_err != DB_NOTFOUND ) {
 332                 switch( rs->sr_err ) {
 333                 case DB_LOCK_DEADLOCK:
 334                 case DB_LOCK_NOTGRANTED:
 335                         goto retry;
 336                 case 0:
 337                         Debug(LDAP_DEBUG_ARGS,
 338                                 "<=- " LDAP_XSTRING(bdb_delete)
 339                                 ": non-leaf %s\n",
 340                                 op->o_req_dn.bv_val, 0, 0);
 341                         rs->sr_err = LDAP_NOT_ALLOWED_ON_NONLEAF;
 342                         rs->sr_text = "subordinate objects must be deleted first";
 343                         break;
 344                 default:
 345                         Debug(LDAP_DEBUG_ARGS,
 346                                 "<=- " LDAP_XSTRING(bdb_delete)
 347                                 ": has_children failed: %s (%d)\n",
 348                                 db_strerror(rs->sr_err), rs->sr_err, 0 );
 349                         rs->sr_err = LDAP_OTHER;
 350                         rs->sr_text = "internal error";
 351                 }
 352                 goto return_results;
 353         }
 354
 355         /* delete from dn2id */
 356         rs->sr_err = bdb_dn2id_delete( op, lt2, eip, e );
 357         if ( rs->sr_err != 0 ) {
 358                 Debug(LDAP_DEBUG_TRACE,
 359                         "<=- " LDAP_XSTRING(bdb_delete) ": dn2id failed: "
 360                         "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
 361                 switch( rs->sr_err ) {
 362                 case DB_LOCK_DEADLOCK:
 363                 case DB_LOCK_NOTGRANTED:
 364                         goto retry;
 365                 }
 366                 rs->sr_text = "DN index delete failed";
 367                 rs->sr_err = LDAP_OTHER;
 368                 goto return_results;
 369         }
 370
 371         /* delete indices for old attributes */
 372         rs->sr_err = bdb_index_entry_del( op, lt2, e );
 373         if ( rs->sr_err != LDAP_SUCCESS ) {
 374                 Debug(LDAP_DEBUG_TRACE,
 375                         "<=- " LDAP_XSTRING(bdb_delete) ": index failed: "
 376                         "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
 377                 switch( rs->sr_err ) {
 378                 case DB_LOCK_DEADLOCK:
 379                 case DB_LOCK_NOTGRANTED:
 380                         goto retry;
 381                 }
 382                 rs->sr_text = "entry index delete failed";
 383                 rs->sr_err = LDAP_OTHER;
 384                 goto return_results;
 385         }
 386
 387         /* fixup delete CSN */
 388         if ( !SLAP_SHADOW( op->o_bd )) {
 389                 struct berval vals[2];
 390
 391                 assert( !BER_BVISNULL( &op->o_csn ) );
 392                 vals[0] = op->o_csn;
 393                 BER_BVZERO( &vals[1] );
 394                 rs->sr_err = bdb_index_values( op, lt2, slap_schema.si_ad_entryCSN,
 395                         vals, 0, SLAP_INDEX_ADD_OP );
 396         if ( rs->sr_err != LDAP_SUCCESS ) {
 397                         switch( rs->sr_err ) {
 398                         case DB_LOCK_DEADLOCK:
 399                         case DB_LOCK_NOTGRANTED:
 400                                 goto retry;
 401                         }
 402                         rs->sr_text = "entryCSN index update failed";
 403                         rs->sr_err = LDAP_OTHER;
 404                         goto return_results;
 405                 }
 406         }
 407
 408         /* delete from id2entry */
 409         rs->sr_err = bdb_id2entry_delete( op->o_bd, lt2, e );
 410         if ( rs->sr_err != 0 ) {
 411                 Debug( LDAP_DEBUG_TRACE,
 412                         "<=- " LDAP_XSTRING(bdb_delete) ": id2entry failed: "
 413                         "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
 414                 switch( rs->sr_err ) {
 415                 case DB_LOCK_DEADLOCK:
 416                 case DB_LOCK_NOTGRANTED:
 417                         goto retry;
 418                 }
 419                 rs->sr_text = "entry delete failed";
 420                 rs->sr_err = LDAP_OTHER;
 421                 goto return_results;
 422         }
 423
 424         if ( pdn.bv_len != 0 ) {
 425                 parent_is_glue = is_entry_glue(p);
 426                 rs->sr_err = bdb_cache_children( op, lt2, p );
 427                 if ( rs->sr_err != DB_NOTFOUND ) {
 428                         switch( rs->sr_err ) {
 429                         case DB_LOCK_DEADLOCK:
 430                         case DB_LOCK_NOTGRANTED:
 431                                 goto retry;
 432                         case 0:
 433                                 break;
 434                         default:
 435                                 Debug(LDAP_DEBUG_ARGS,
 436                                         "<=- " LDAP_XSTRING(bdb_delete)
 437                                         ": has_children failed: %s (%d)\n",
 438                                         db_strerror(rs->sr_err), rs->sr_err, 0 );
 439                                 rs->sr_err = LDAP_OTHER;
 440                                 rs->sr_text = "internal error";
 441                                 goto return_results;
 442                         }
 443                         parent_is_leaf = 1;
 444                 }
 445                 bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p);
 446                 p = NULL;
 447         }
 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         eid = e->e_id;
 456
 457 #if 0   /* Do we want to reclaim deleted IDs? */
 458         ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
 459         if ( e->e_id == bdb->bi_lastid ) {
 460                 bdb_last_id( op->o_bd, ltid );
 461         }
 462         ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
 463 #endif
 464
 465         if( op->o_noop ) {
 466                 if ( ( rs->sr_err = TXN_ABORT( ltid ) ) != 0 ) {
 467                         rs->sr_text = "txn_abort (no-op) failed";
 468                 } else {
 469                         rs->sr_err = LDAP_X_NO_OPERATION;
 470                         ltid = NULL;
 471                         goto return_results;
 472                 }
 473         } else {
 474                 rc = bdb_cache_delete( &bdb->bi_cache, e, bdb->bi_dbenv,
 475                         locker, &lock );
 476                 switch( rc ) {
 477                 case DB_LOCK_DEADLOCK:
 478                 case DB_LOCK_NOTGRANTED:
 479                         goto retry;
 480                 }
 481
 482                 rs->sr_err = TXN_COMMIT( ltid, 0 );
 483         }
 484         ltid = NULL;
 485         op->o_private = NULL;
 486
 487         if( rs->sr_err != 0 ) {
 488                 Debug( LDAP_DEBUG_TRACE,
 489                         LDAP_XSTRING(bdb_delete) ": txn_%s failed: %s (%d)\n",
 490                         op->o_noop ? "abort (no-op)" : "commit",
 491                         db_strerror(rs->sr_err), rs->sr_err );
 492                 rs->sr_err = LDAP_OTHER;
 493                 rs->sr_text = "commit failed";
 494
 495                 goto return_results;
 496         }
 497
 498         Debug( LDAP_DEBUG_TRACE,
 499                 LDAP_XSTRING(bdb_delete) ": deleted%s id=%08lx dn=\"%s\"\n",
 500                 op->o_noop ? " (no-op)" : "",
 501                 eid, op->o_req_dn.bv_val );
 502         rs->sr_err = LDAP_SUCCESS;
 503         rs->sr_text = NULL;
 504         if( num_ctrls ) rs->sr_ctrls = ctrls;
 505
 506 return_results:
 507         if ( rs->sr_err == LDAP_SUCCESS && parent_is_glue && parent_is_leaf ) {
 508                 op->o_delete_glue_parent = 1;
 509         }
 510
 511         if ( p )
 512                 bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p);
 513
 514         /* free entry */
 515         if( e != NULL ) {
 516                 if ( rs->sr_err == LDAP_SUCCESS ) {
 517                         /* Free the EntryInfo and the Entry */
 518                         bdb_cache_delete_cleanup( &bdb->bi_cache, BEI(e) );
 519                 } else {
 520                         bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e);
 521                 }
 522         }
 523
 524         if( ltid != NULL ) {
 525                 TXN_ABORT( ltid );
 526         }
 527         op->o_private = NULL;
 528
 529         send_ldap_result( op, rs );
 530         if ( !SLAP_SHADOW( op->o_bd ))
 531                 slap_graduate_commit_csn( op );
 532
 533         if( preread_ctrl != NULL ) {
 534                 slap_sl_free( (*preread_ctrl)->ldctl_value.bv_val, op->o_tmpmemctx );
 535                 slap_sl_free( *preread_ctrl, op->o_tmpmemctx );
 536         }
 537
 538         if( rs->sr_err == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 539                 TXN_CHECKPOINT( bdb->bi_dbenv,
 540                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 541         }
 542         return rs->sr_err;
 543 }