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                 parent_is_glue = 0;
  87                 parent_is_leaf = 0;
  88                 ldap_pvt_thread_yield();
  89                 bdb_trans_backoff( ++num_retries );
  90         }
  91
  92         /* begin transaction */
  93         rs->sr_err = TXN_BEGIN( bdb->bi_dbenv, NULL, &ltid,
  94                 bdb->bi_db_opflags );
  95         rs->sr_text = NULL;
  96         if( rs->sr_err != 0 ) {
  97                 Debug( LDAP_DEBUG_TRACE,
  98                         LDAP_XSTRING(bdb_delete) ": txn_begin failed: "
  99                         "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
 100                 rs->sr_err = LDAP_OTHER;
 101                 rs->sr_text = "internal error";
 102                 goto return_results;
 103         }
 104
 105         locker = TXN_ID ( ltid );
 106
 107         opinfo.boi_bdb = op->o_bd;
 108         opinfo.boi_txn = ltid;
 109         opinfo.boi_locker = locker;
 110         opinfo.boi_err = 0;
 111         opinfo.boi_acl_cache = op->o_do_not_cache;
 112         op->o_private = &opinfo;
 113
 114         if ( !be_issuffix( op->o_bd, &op->o_req_ndn ) ) {
 115                 dnParent( &op->o_req_ndn, &pdn );
 116         }
 117
 118         /* get entry */
 119         rs->sr_err = bdb_dn2entry( op, ltid, &op->o_req_ndn, &ei, 1,
 120                 locker, &lock );
 121
 122         switch( rs->sr_err ) {
 123         case 0:
 124         case DB_NOTFOUND:
 125                 break;
 126         case DB_LOCK_DEADLOCK:
 127         case DB_LOCK_NOTGRANTED:
 128                 goto retry;
 129         case LDAP_BUSY:
 130                 rs->sr_text = "ldap server busy";
 131                 goto return_results;
 132         default:
 133                 rs->sr_err = LDAP_OTHER;
 134                 rs->sr_text = "internal error";
 135                 goto return_results;
 136         }
 137
 138         if ( rs->sr_err == 0 ) {
 139                 e = ei->bei_e;
 140                 eip = ei->bei_parent;
 141         } else {
 142                 matched = ei->bei_e;
 143         }
 144
 145         /* FIXME : dn2entry() should return non-glue entry */
 146         if ( e == NULL || ( !manageDSAit && is_entry_glue( e ))) {
 147                 Debug( LDAP_DEBUG_ARGS,
 148                         "<=- " LDAP_XSTRING(bdb_delete) ": no such object %s\n",
 149                         op->o_req_dn.bv_val, 0, 0);
 150
 151                 if ( matched != NULL ) {
 152                         rs->sr_matched = ch_strdup( matched->e_dn );
 153                         rs->sr_ref = is_entry_referral( matched )
 154                                 ? get_entry_referrals( op, matched )
 155                                 : NULL;
 156                         bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, matched);
 157                         matched = NULL;
 158
 159                 } else {
 160                         rs->sr_ref = referral_rewrite( default_referral, NULL,
 161                                         &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 162                 }
 163
 164                 rs->sr_err = LDAP_REFERRAL;
 165                 send_ldap_result( op, rs );
 166
 167                 if ( rs->sr_ref != default_referral ) {
 168                         ber_bvarray_free( rs->sr_ref );
 169                 }
 170                 free( (char *)rs->sr_matched );
 171                 rs->sr_ref = NULL;
 172                 rs->sr_matched = NULL;
 173
 174                 rs->sr_err = -1;
 175                 goto done;
 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_WRITE, 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_WRITE, 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_WRITE, 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 = e->e_name.bv_val;
 296                 send_ldap_result( op, rs );
 297
 298                 ber_bvarray_free( rs->sr_ref );
 299                 rs->sr_ref = NULL;
 300                 rs->sr_matched = NULL;
 301
 302                 rs->sr_err = 1;
 303                 goto done;
 304         }
 305
 306         /* pre-read */
 307         if( op->o_preread ) {
 308                 if( preread_ctrl == NULL ) {
 309                         preread_ctrl = &ctrls[num_ctrls++];
 310                         ctrls[num_ctrls] = NULL;
 311                 }
 312                 if( slap_read_controls( op, rs, e,
 313                         &slap_pre_read_bv, preread_ctrl ) )
 314                 {
 315                         Debug( LDAP_DEBUG_TRACE,
 316                                 "<=- " LDAP_XSTRING(bdb_delete) ": pre-read "
 317                                 "failed!\n", 0, 0, 0 );
 318                         goto return_results;
 319                 }
 320         }
 321
 322         /* nested transaction */
 323         rs->sr_err = TXN_BEGIN( bdb->bi_dbenv, ltid, &lt2,
 324                 bdb->bi_db_opflags );
 325         rs->sr_text = NULL;
 326         if( rs->sr_err != 0 ) {
 327                 Debug( LDAP_DEBUG_TRACE,
 328                         LDAP_XSTRING(bdb_delete) ": txn_begin(2) failed: "
 329                         "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
 330                 rs->sr_err = LDAP_OTHER;
 331                 rs->sr_text = "internal error";
 332                 goto return_results;
 333         }
 334
 335         /* Can't do it if we have kids */
 336         rs->sr_err = bdb_cache_children( op, lt2, e );
 337         if( rs->sr_err != DB_NOTFOUND ) {
 338                 switch( rs->sr_err ) {
 339                 case DB_LOCK_DEADLOCK:
 340                 case DB_LOCK_NOTGRANTED:
 341                         goto retry;
 342                 case 0:
 343                         Debug(LDAP_DEBUG_ARGS,
 344                                 "<=- " LDAP_XSTRING(bdb_delete)
 345                                 ": non-leaf %s\n",
 346                                 op->o_req_dn.bv_val, 0, 0);
 347                         rs->sr_err = LDAP_NOT_ALLOWED_ON_NONLEAF;
 348                         rs->sr_text = "subordinate objects must be deleted first";
 349                         break;
 350                 default:
 351                         Debug(LDAP_DEBUG_ARGS,
 352                                 "<=- " LDAP_XSTRING(bdb_delete)
 353                                 ": has_children failed: %s (%d)\n",
 354                                 db_strerror(rs->sr_err), rs->sr_err, 0 );
 355                         rs->sr_err = LDAP_OTHER;
 356                         rs->sr_text = "internal error";
 357                 }
 358                 goto return_results;
 359         }
 360
 361         /* delete from dn2id */
 362         rs->sr_err = bdb_dn2id_delete( op, lt2, eip, e );
 363         if ( rs->sr_err != 0 ) {
 364                 Debug(LDAP_DEBUG_TRACE,
 365                         "<=- " LDAP_XSTRING(bdb_delete) ": dn2id failed: "
 366                         "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
 367                 switch( rs->sr_err ) {
 368                 case DB_LOCK_DEADLOCK:
 369                 case DB_LOCK_NOTGRANTED:
 370                         goto retry;
 371                 }
 372                 rs->sr_text = "DN index delete failed";
 373                 rs->sr_err = LDAP_OTHER;
 374                 goto return_results;
 375         }
 376
 377         /* delete from id2entry */
 378         rs->sr_err = bdb_id2entry_delete( op->o_bd, lt2, e );
 379         if ( rs->sr_err != 0 ) {
 380                 Debug(LDAP_DEBUG_TRACE,
 381                         "<=- " LDAP_XSTRING(bdb_delete) ": id2entry failed: "
 382                         "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
 383                 switch( rs->sr_err ) {
 384                 case DB_LOCK_DEADLOCK:
 385                 case DB_LOCK_NOTGRANTED:
 386                         goto retry;
 387                 }
 388                 rs->sr_text = "entry delete failed";
 389                 rs->sr_err = LDAP_OTHER;
 390                 goto return_results;
 391         }
 392
 393         /* delete indices for old attributes */
 394         rs->sr_err = bdb_index_entry_del( op, lt2, e );
 395         if ( rs->sr_err != LDAP_SUCCESS ) {
 396                 Debug( LDAP_DEBUG_TRACE,
 397                         "<=- " LDAP_XSTRING(bdb_delete) ": index failed: "
 398                         "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 );
 399                 switch( rs->sr_err ) {
 400                 case DB_LOCK_DEADLOCK:
 401                 case DB_LOCK_NOTGRANTED:
 402                         goto retry;
 403                 }
 404                 rs->sr_text = "entry index delete failed";
 405                 rs->sr_err = LDAP_OTHER;
 406                 goto return_results;
 407         }
 408
 409         if ( pdn.bv_len != 0 ) {
 410                 parent_is_glue = is_entry_glue(p);
 411                 rs->sr_err = bdb_cache_children( op, lt2, p );
 412                 if ( rs->sr_err != DB_NOTFOUND ) {
 413                         switch( rs->sr_err ) {
 414                         case DB_LOCK_DEADLOCK:
 415                         case DB_LOCK_NOTGRANTED:
 416                                 goto retry;
 417                         case 0:
 418                                 break;
 419                         default:
 420                                 Debug(LDAP_DEBUG_ARGS,
 421                                         "<=- " LDAP_XSTRING(bdb_delete)
 422                                         ": has_children failed: %s (%d)\n",
 423                                         db_strerror(rs->sr_err), rs->sr_err, 0 );
 424                                 rs->sr_err = LDAP_OTHER;
 425                                 rs->sr_text = "internal error";
 426                                 goto return_results;
 427                         }
 428                         parent_is_leaf = 1;
 429                 }
 430                 bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p);
 431                 p = NULL;
 432         }
 433
 434         if ( TXN_COMMIT( lt2, 0 ) != 0 ) {
 435                 rs->sr_err = LDAP_OTHER;
 436                 rs->sr_text = "txn_commit(2) failed";
 437                 goto return_results;
 438         }
 439
 440         eid = e->e_id;
 441
 442 #if 0   /* Do we want to reclaim deleted IDs? */
 443         ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
 444         if ( e->e_id == bdb->bi_lastid ) {
 445                 bdb_last_id( op->o_bd, ltid );
 446         }
 447         ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
 448 #endif
 449
 450         if( op->o_noop ) {
 451                 if ( ( rs->sr_err = TXN_ABORT( ltid ) ) != 0 ) {
 452                         rs->sr_text = "txn_abort (no-op) failed";
 453                 } else {
 454                         rs->sr_err = LDAP_NO_OPERATION;
 455                         goto return_results;
 456                 }
 457         } else {
 458                 rc = bdb_cache_delete( &bdb->bi_cache, e, bdb->bi_dbenv,
 459                         locker, &lock );
 460                 switch( rc ) {
 461                 case DB_LOCK_DEADLOCK:
 462                 case DB_LOCK_NOTGRANTED:
 463                         goto retry;
 464                 }
 465
 466                 rs->sr_err = TXN_COMMIT( ltid, 0 );
 467         }
 468         ltid = NULL;
 469         op->o_private = NULL;
 470
 471         if( rs->sr_err != 0 ) {
 472                 Debug( LDAP_DEBUG_TRACE,
 473                         LDAP_XSTRING(bdb_delete) ": txn_%s failed: %s (%d)\n",
 474                         op->o_noop ? "abort (no-op)" : "commit",
 475                         db_strerror(rs->sr_err), rs->sr_err );
 476                 rs->sr_err = LDAP_OTHER;
 477                 rs->sr_text = "commit failed";
 478
 479                 goto return_results;
 480         }
 481
 482         Debug( LDAP_DEBUG_TRACE,
 483                 LDAP_XSTRING(bdb_delete) ": deleted%s id=%08lx dn=\"%s\"\n",
 484                 op->o_noop ? " (no-op)" : "",
 485                 eid, op->o_req_dn.bv_val );
 486         rs->sr_err = LDAP_SUCCESS;
 487         rs->sr_text = NULL;
 488         if( num_ctrls ) rs->sr_ctrls = ctrls;
 489
 490 return_results:
 491         send_ldap_result( op, rs );
 492
 493         if( rs->sr_err == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 494                 ldap_pvt_thread_yield();
 495                 TXN_CHECKPOINT( bdb->bi_dbenv,
 496                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 497         }
 498
 499         if ( rs->sr_err == LDAP_SUCCESS && parent_is_glue && parent_is_leaf ) {
 500                 op->o_delete_glue_parent = 1;
 501         }
 502
 503 done:
 504         if ( p )
 505                 bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p);
 506
 507         /* free entry */
 508         if( e != NULL ) {
 509                 if ( rs->sr_err == LDAP_SUCCESS ) {
 510                         /* Free the EntryInfo and the Entry */
 511                         bdb_cache_delete_cleanup( &bdb->bi_cache, BEI(e) );
 512                 } else {
 513                         bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e);
 514                 }
 515         }
 516
 517         if( ltid != NULL ) {
 518                 TXN_ABORT( ltid );
 519                 op->o_private = NULL;
 520         }
 521
 522         slap_sl_free( ctxcsn_ndn.bv_val, op->o_tmpmemctx );
 523
 524         if( preread_ctrl != NULL ) {
 525                 slap_sl_free( (*preread_ctrl)->ldctl_value.bv_val, op->o_tmpmemctx );
 526                 slap_sl_free( *preread_ctrl, op->o_tmpmemctx );
 527         }
 528         return rs->sr_err;
 529 }