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 2000-2005 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 "back-bdb.h"
  23
  24 int
  25 bdb_delete( Operation *op, SlapReply *rs )
  26 {
  27         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
  28         Entry   *matched = NULL;
  29         struct berval   pdn = {0, NULL};
  30         Entry   *e = NULL;
  31         Entry   *p = NULL;
  32         EntryInfo       *ei = NULL, *eip = NULL;
  33         int             manageDSAit = get_manageDSAit( op );
  34         AttributeDescription *children = slap_schema.si_ad_children;
  35         AttributeDescription *entry = slap_schema.si_ad_entry;
  36         DB_TXN          *ltid = NULL, *lt2;
  37         struct bdb_op_info opinfo = {0};
  38         ID      eid;
  39
  40         u_int32_t       locker = 0;
  41         DB_LOCK         lock, plock;
  42
  43         int             num_retries = 0;
  44
  45         int     rc;
  46
  47         LDAPControl **preread_ctrl = NULL;
  48         LDAPControl *ctrls[SLAP_MAX_RESPONSE_CONTROLS];
  49         int num_ctrls = 0;
  50
  51         int     parent_is_glue = 0;
  52         int parent_is_leaf = 0;
  53
  54         struct berval ctxcsn_ndn = BER_BVNULL;
  55
  56         ctrls[num_ctrls] = 0;
  57
  58         Debug( LDAP_DEBUG_ARGS, "==> " LDAP_XSTRING(bdb_delete) ": %s\n",
  59                 op->o_req_dn.bv_val, 0, 0 );
  60
  61         build_new_dn( &ctxcsn_ndn, &op->o_bd->be_nsuffix[0],
  62                                 (struct berval *)&slap_ldapsync_cn_bv, op->o_tmpmemctx );
  63
  64         if( 0 ) {
  65 retry:  /* transaction retry */
  66                 if( e != NULL ) {
  67                         bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e);
  68                         e = NULL;
  69                 }
  70                 if( p != NULL ) {
  71                         bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p);
  72                         p = NULL;
  73                 }
  74                 Debug( LDAP_DEBUG_TRACE,
  75                         "==> " LDAP_XSTRING(bdb_delete) ": retrying...\n",
  76                         0, 0, 0 );
  77                 rs->sr_err = TXN_ABORT( ltid );
  78                 ltid = NULL;
  79                 op->o_private = NULL;
  80                 op->o_do_not_cache = opinfo.boi_acl_cache;
  81                 if( rs->sr_err != 0 ) {
  82                         rs->sr_err = LDAP_OTHER;
  83                         rs->sr_text = "internal error";
  84                         goto return_results;
  85                 }
  86                 if ( op->o_abandon ) {
  87                         rs->sr_err = SLAPD_ABANDON;
  88                         goto return_results;
  89                 }
  90                 parent_is_glue = 0;
  91                 parent_is_leaf = 0;
  92                 ldap_pvt_thread_yield();
  93                 bdb_trans_backoff( ++num_retries );
  94         }
  95
  96         /* begin transaction */
  97         rs->sr_err = TXN_BEGIN( bdb->bi_dbenv, NULL, &ltid,
  98                 bdb->bi_db_opflags );
  99         rs->sr_text = NULL;
 100         if( rs->sr_err != 0 ) {
 101                 Debug( LDAP_DEBUG_TRACE,
 102                         LDAP_XSTRING(bdb_delete) ": txn_begin failed: "
 103                         "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
 104                 rs->sr_err = LDAP_OTHER;
 105                 rs->sr_text = "internal error";
 106                 goto return_results;
 107         }
 108
 109         locker = TXN_ID ( ltid );
 110
 111         opinfo.boi_bdb = op->o_bd;
 112         opinfo.boi_txn = ltid;
 113         opinfo.boi_locker = locker;
 114         opinfo.boi_err = 0;
 115         opinfo.boi_acl_cache = op->o_do_not_cache;
 116         op->o_private = &opinfo;
 117
 118         if ( !be_issuffix( op->o_bd, &op->o_req_ndn ) ) {
 119                 dnParent( &op->o_req_ndn, &pdn );
 120         }
 121
 122         /* get entry */
 123         rs->sr_err = bdb_dn2entry( op, ltid, &op->o_req_ndn, &ei, 1,
 124                 locker, &lock );
 125
 126         switch( rs->sr_err ) {
 127         case 0:
 128         case DB_NOTFOUND:
 129                 break;
 130         case DB_LOCK_DEADLOCK:
 131         case DB_LOCK_NOTGRANTED:
 132                 goto retry;
 133         case LDAP_BUSY:
 134                 rs->sr_text = "ldap server busy";
 135                 goto return_results;
 136         default:
 137                 rs->sr_err = LDAP_OTHER;
 138                 rs->sr_text = "internal error";
 139                 goto return_results;
 140         }
 141
 142         if ( rs->sr_err == 0 ) {
 143                 e = ei->bei_e;
 144                 eip = ei->bei_parent;
 145         } else {
 146                 matched = ei->bei_e;
 147         }
 148
 149         /* FIXME : dn2entry() should return non-glue entry */
 150         if ( e == NULL || ( !manageDSAit && is_entry_glue( e ))) {
 151                 Debug( LDAP_DEBUG_ARGS,
 152                         "<=- " LDAP_XSTRING(bdb_delete) ": no such object %s\n",
 153                         op->o_req_dn.bv_val, 0, 0);
 154
 155                 if ( matched != NULL ) {
 156                         rs->sr_matched = ch_strdup( matched->e_dn );
 157                         rs->sr_ref = is_entry_referral( matched )
 158                                 ? get_entry_referrals( op, matched )
 159                                 : NULL;
 160                         bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, matched);
 161                         matched = NULL;
 162
 163                 } else {
 164                         rs->sr_ref = referral_rewrite( default_referral, NULL,
 165                                         &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 166                 }
 167
 168                 rs->sr_err = LDAP_REFERRAL;
 169                 send_ldap_result( op, rs );
 170
 171                 if ( rs->sr_ref != default_referral ) {
 172                         ber_bvarray_free( rs->sr_ref );
 173                 }
 174                 free( (char *)rs->sr_matched );
 175                 rs->sr_ref = NULL;
 176                 rs->sr_matched = NULL;
 177
 178                 rs->sr_err = -1;
 179                 goto done;
 180         }
 181
 182         rc = bdb_cache_find_id( op, ltid, eip->bei_id, &eip, 0, locker, &plock );
 183         switch( rc ) {
 184         case DB_LOCK_DEADLOCK:
 185         case DB_LOCK_NOTGRANTED:
 186                 goto retry;
 187         case 0:
 188         case DB_NOTFOUND:
 189                 break;
 190         default:
 191                 rs->sr_err = LDAP_OTHER;
 192                 rs->sr_text = "internal error";
 193                 goto return_results;
 194         }
 195         if ( eip ) p = eip->bei_e;
 196
 197         if ( pdn.bv_len != 0 ) {
 198                 if( p == NULL || !bvmatch( &pdn, &p->e_nname )) {
 199                         Debug( LDAP_DEBUG_TRACE,
 200                                 "<=- " LDAP_XSTRING(bdb_delete) ": parent "
 201                                 "does not exist\n", 0, 0, 0 );
 202                         rs->sr_err = LDAP_OTHER;
 203                         rs->sr_text = "could not locate parent of entry";
 204                         goto return_results;
 205                 }
 206
 207                 /* check parent for "children" acl */
 208                 rs->sr_err = access_allowed( op, p,
 209                         children, NULL, ACL_WDEL, NULL );
 210
 211                 if ( !rs->sr_err  ) {
 212                         switch( opinfo.boi_err ) {
 213                         case DB_LOCK_DEADLOCK:
 214                         case DB_LOCK_NOTGRANTED:
 215                                 goto retry;
 216                         }
 217
 218                         Debug( LDAP_DEBUG_TRACE,
 219                                 "<=- " LDAP_XSTRING(bdb_delete) ": no write "
 220                                 "access to parent\n", 0, 0, 0 );
 221                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 222                         rs->sr_text = "no write access to parent";
 223                         goto return_results;
 224                 }
 225
 226         } else {
 227                 /* no parent, must be root to delete */
 228                 if( ! be_isroot( op ) ) {
 229                         if ( be_issuffix( op->o_bd, (struct berval *)&slap_empty_bv )
 230                                 || be_shadow_update( op ) ) {
 231                                 p = (Entry *)&slap_entry_root;
 232
 233                                 /* check parent for "children" acl */
 234                                 rs->sr_err = access_allowed( op, p,
 235                                         children, NULL, ACL_WDEL, NULL );
 236
 237                                 p = NULL;
 238
 239                                 if ( !rs->sr_err  ) {
 240                                         switch( opinfo.boi_err ) {
 241                                         case DB_LOCK_DEADLOCK:
 242                                         case DB_LOCK_NOTGRANTED:
 243                                                 goto retry;
 244                                         }
 245
 246                                         Debug( LDAP_DEBUG_TRACE,
 247                                                 "<=- " LDAP_XSTRING(bdb_delete)
 248                                                 ": no access to parent\n",
 249                                                 0, 0, 0 );
 250                                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 251                                         rs->sr_text = "no write access to parent";
 252                                         goto return_results;
 253                                 }
 254
 255                         } else {
 256                                 Debug( LDAP_DEBUG_TRACE,
 257                                         "<=- " LDAP_XSTRING(bdb_delete)
 258                                         ": no parent and not root\n", 0, 0, 0 );
 259                                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 260                                 goto return_results;
 261                         }
 262                 }
 263         }
 264
 265         if ( get_assert( op ) &&
 266                 ( test_filter( op, e, get_assertion( op )) != LDAP_COMPARE_TRUE ))
 267         {
 268                 rs->sr_err = LDAP_ASSERTION_FAILED;
 269                 goto return_results;
 270         }
 271
 272         rs->sr_err = access_allowed( op, e,
 273                 entry, NULL, ACL_WDEL, NULL );
 274
 275         if ( !rs->sr_err  ) {
 276                 switch( opinfo.boi_err ) {
 277                 case DB_LOCK_DEADLOCK:
 278                 case DB_LOCK_NOTGRANTED:
 279                         goto retry;
 280                 }
 281
 282                 Debug( LDAP_DEBUG_TRACE,
 283                         "<=- " LDAP_XSTRING(bdb_delete) ": no write access "
 284                         "to entry\n", 0, 0, 0 );
 285                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 286                 rs->sr_text = "no write access to entry";
 287                 goto return_results;
 288         }
 289
 290         if ( !manageDSAit && is_entry_referral( e ) ) {
 291                 /* entry is a referral, don't allow delete */
 292                 rs->sr_ref = get_entry_referrals( op, e );
 293
 294                 Debug( LDAP_DEBUG_TRACE,
 295                         LDAP_XSTRING(bdb_delete) ": entry is referral\n",
 296                         0, 0, 0 );
 297
 298                 rs->sr_err = LDAP_REFERRAL;
 299                 rs->sr_matched = e->e_name.bv_val;
 300                 send_ldap_result( op, rs );
 301
 302                 ber_bvarray_free( rs->sr_ref );
 303                 rs->sr_ref = NULL;
 304                 rs->sr_matched = NULL;
 305
 306                 rs->sr_err = 1;
 307                 goto done;
 308         }
 309
 310         /* pre-read */
 311         if( op->o_preread ) {
 312                 if( preread_ctrl == NULL ) {
 313                         preread_ctrl = &ctrls[num_ctrls++];
 314                         ctrls[num_ctrls] = NULL;
 315                 }
 316                 if( slap_read_controls( op, rs, e,
 317                         &slap_pre_read_bv, preread_ctrl ) )
 318                 {
 319                         Debug( LDAP_DEBUG_TRACE,
 320                                 "<=- " LDAP_XSTRING(bdb_delete) ": pre-read "
 321                                 "failed!\n", 0, 0, 0 );
 322                         goto return_results;
 323                 }
 324         }
 325
 326         /* nested transaction */
 327         rs->sr_err = TXN_BEGIN( bdb->bi_dbenv, ltid, &lt2,
 328                 bdb->bi_db_opflags );
 329         rs->sr_text = NULL;
 330         if( rs->sr_err != 0 ) {
 331                 Debug( LDAP_DEBUG_TRACE,
 332                         LDAP_XSTRING(bdb_delete) ": txn_begin(2) failed: "
 333                         "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
 334                 rs->sr_err = LDAP_OTHER;
 335                 rs->sr_text = "internal error";
 336                 goto return_results;
 337         }
 338
 339         /* Can't do it if we have kids */
 340         rs->sr_err = bdb_cache_children( op, lt2, e );
 341         if( rs->sr_err != DB_NOTFOUND ) {
 342                 switch( rs->sr_err ) {
 343                 case DB_LOCK_DEADLOCK:
 344                 case DB_LOCK_NOTGRANTED:
 345                         goto retry;
 346                 case 0:
 347                         Debug(LDAP_DEBUG_ARGS,
 348                                 "<=- " LDAP_XSTRING(bdb_delete)
 349                                 ": non-leaf %s\n",
 350                                 op->o_req_dn.bv_val, 0, 0);
 351                         rs->sr_err = LDAP_NOT_ALLOWED_ON_NONLEAF;
 352                         rs->sr_text = "subordinate objects must be deleted first";
 353                         break;
 354                 default:
 355                         Debug(LDAP_DEBUG_ARGS,
 356                                 "<=- " LDAP_XSTRING(bdb_delete)
 357                                 ": has_children failed: %s (%d)\n",
 358                                 db_strerror(rs->sr_err), rs->sr_err, 0 );
 359                         rs->sr_err = LDAP_OTHER;
 360                         rs->sr_text = "internal error";
 361                 }
 362                 goto return_results;
 363         }
 364
 365         /* delete from dn2id */
 366         rs->sr_err = bdb_dn2id_delete( op, lt2, eip, e );
 367         if ( rs->sr_err != 0 ) {
 368                 Debug(LDAP_DEBUG_TRACE,
 369                         "<=- " LDAP_XSTRING(bdb_delete) ": dn2id failed: "
 370                         "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
 371                 switch( rs->sr_err ) {
 372                 case DB_LOCK_DEADLOCK:
 373                 case DB_LOCK_NOTGRANTED:
 374                         goto retry;
 375                 }
 376                 rs->sr_text = "DN index delete failed";
 377                 rs->sr_err = LDAP_OTHER;
 378                 goto return_results;
 379         }
 380
 381         /* delete from id2entry */
 382         rs->sr_err = bdb_id2entry_delete( op->o_bd, lt2, e );
 383         if ( rs->sr_err != 0 ) {
 384                 Debug(LDAP_DEBUG_TRACE,
 385                         "<=- " LDAP_XSTRING(bdb_delete) ": id2entry failed: "
 386                         "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
 387                 switch( rs->sr_err ) {
 388                 case DB_LOCK_DEADLOCK:
 389                 case DB_LOCK_NOTGRANTED:
 390                         goto retry;
 391                 }
 392                 rs->sr_text = "entry delete failed";
 393                 rs->sr_err = LDAP_OTHER;
 394                 goto return_results;
 395         }
 396
 397         /* delete indices for old attributes */
 398         rs->sr_err = bdb_index_entry_del( op, lt2, e );
 399         if ( rs->sr_err != LDAP_SUCCESS ) {
 400                 Debug( LDAP_DEBUG_TRACE,
 401                         "<=- " LDAP_XSTRING(bdb_delete) ": index failed: "
 402                         "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
 403                 switch( rs->sr_err ) {
 404                 case DB_LOCK_DEADLOCK:
 405                 case DB_LOCK_NOTGRANTED:
 406                         goto retry;
 407                 }
 408                 rs->sr_text = "entry index delete failed";
 409                 rs->sr_err = LDAP_OTHER;
 410                 goto return_results;
 411         }
 412
 413         if ( pdn.bv_len != 0 ) {
 414                 parent_is_glue = is_entry_glue(p);
 415                 rs->sr_err = bdb_cache_children( op, lt2, p );
 416                 if ( rs->sr_err != DB_NOTFOUND ) {
 417                         switch( rs->sr_err ) {
 418                         case DB_LOCK_DEADLOCK:
 419                         case DB_LOCK_NOTGRANTED:
 420                                 goto retry;
 421                         case 0:
 422                                 break;
 423                         default:
 424                                 Debug(LDAP_DEBUG_ARGS,
 425                                         "<=- " LDAP_XSTRING(bdb_delete)
 426                                         ": has_children failed: %s (%d)\n",
 427                                         db_strerror(rs->sr_err), rs->sr_err, 0 );
 428                                 rs->sr_err = LDAP_OTHER;
 429                                 rs->sr_text = "internal error";
 430                                 goto return_results;
 431                         }
 432                         parent_is_leaf = 1;
 433                 }
 434                 bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p);
 435                 p = NULL;
 436         }
 437
 438         if ( TXN_COMMIT( lt2, 0 ) != 0 ) {
 439                 rs->sr_err = LDAP_OTHER;
 440                 rs->sr_text = "txn_commit(2) failed";
 441                 goto return_results;
 442         }
 443
 444         eid = e->e_id;
 445
 446 #if 0   /* Do we want to reclaim deleted IDs? */
 447         ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
 448         if ( e->e_id == bdb->bi_lastid ) {
 449                 bdb_last_id( op->o_bd, ltid );
 450         }
 451         ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
 452 #endif
 453
 454         if( op->o_noop ) {
 455                 if ( ( rs->sr_err = TXN_ABORT( ltid ) ) != 0 ) {
 456                         rs->sr_text = "txn_abort (no-op) failed";
 457                 } else {
 458                         rs->sr_err = LDAP_NO_OPERATION;
 459                         goto return_results;
 460                 }
 461         } else {
 462                 rc = bdb_cache_delete( &bdb->bi_cache, e, bdb->bi_dbenv,
 463                         locker, &lock );
 464                 switch( rc ) {
 465                 case DB_LOCK_DEADLOCK:
 466                 case DB_LOCK_NOTGRANTED:
 467                         goto retry;
 468                 }
 469
 470                 rs->sr_err = TXN_COMMIT( ltid, 0 );
 471         }
 472         ltid = NULL;
 473         op->o_private = NULL;
 474
 475         if( rs->sr_err != 0 ) {
 476                 Debug( LDAP_DEBUG_TRACE,
 477                         LDAP_XSTRING(bdb_delete) ": txn_%s failed: %s (%d)\n",
 478                         op->o_noop ? "abort (no-op)" : "commit",
 479                         db_strerror(rs->sr_err), rs->sr_err );
 480                 rs->sr_err = LDAP_OTHER;
 481                 rs->sr_text = "commit failed";
 482
 483                 goto return_results;
 484         }
 485
 486         Debug( LDAP_DEBUG_TRACE,
 487                 LDAP_XSTRING(bdb_delete) ": deleted%s id=%08lx dn=\"%s\"\n",
 488                 op->o_noop ? " (no-op)" : "",
 489                 eid, op->o_req_dn.bv_val );
 490         rs->sr_err = LDAP_SUCCESS;
 491         rs->sr_text = NULL;
 492         if( num_ctrls ) rs->sr_ctrls = ctrls;
 493
 494 return_results:
 495         send_ldap_result( op, rs );
 496
 497         if( rs->sr_err == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 498                 ldap_pvt_thread_yield();
 499                 TXN_CHECKPOINT( bdb->bi_dbenv,
 500                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 501         }
 502
 503         if ( rs->sr_err == LDAP_SUCCESS && parent_is_glue && parent_is_leaf ) {
 504                 op->o_delete_glue_parent = 1;
 505         }
 506
 507 done:
 508         if ( p )
 509                 bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p);
 510
 511         /* free entry */
 512         if( e != NULL ) {
 513                 if ( rs->sr_err == LDAP_SUCCESS ) {
 514                         /* Free the EntryInfo and the Entry */
 515                         bdb_cache_delete_cleanup( &bdb->bi_cache, BEI(e) );
 516                 } else {
 517                         bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e);
 518                 }
 519         }
 520
 521         if( ltid != NULL ) {
 522                 TXN_ABORT( ltid );
 523                 op->o_private = NULL;
 524         }
 525
 526         slap_sl_free( ctxcsn_ndn.bv_val, op->o_tmpmemctx );
 527
 528         if( preread_ctrl != NULL ) {
 529                 slap_sl_free( (*preread_ctrl)->ldctl_value.bv_val, op->o_tmpmemctx );
 530                 slap_sl_free( *preread_ctrl, op->o_tmpmemctx );
 531         }
 532         return rs->sr_err;
 533 }