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