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

   1 /* delete.c - bdb backend delete routine */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7
   8 #include "portable.h"
   9
  10 #include <stdio.h>
  11 #include <ac/string.h>
  12
  13 #include "back-bdb.h"
  14 #include "external.h"
  15
  16 int
  17 bdb_delete(
  18         BackendDB       *be,
  19         Connection      *conn,
  20         Operation       *op,
  21         struct berval   *dn,
  22         struct berval   *ndn
  23 )
  24 {
  25         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
  26         Entry   *matched;
  27         struct berval   pdn = {0, NULL};
  28         Entry   *e, *p = NULL;
  29         int     rc;
  30         const char *text;
  31         int             manageDSAit = get_manageDSAit( op );
  32         AttributeDescription *children = slap_schema.si_ad_children;
  33         DB_TXN          *ltid = NULL;
  34         struct bdb_op_info opinfo;
  35 #if 0
  36         u_int32_t       lockid;
  37         DB_LOCK         lock;
  38 #endif
  39
  40 #ifdef NEW_LOGGING
  41         LDAP_LOG (( "delete", LDAP_LEVEL_ARGS, "==> bdb_delete: %s\n",
  42                 dn->bv_val ));
  43 #else
  44         Debug( LDAP_DEBUG_ARGS, "==> bdb_delete: %s\n",
  45                 dn->bv_val, 0, 0 );
  46 #endif
  47
  48         if( 0 ) {
  49 retry:  /* transaction retry */
  50                 if( e != NULL ) {
  51                         bdb_cache_return_entry_w(&bdb->bi_cache, e);
  52                 }
  53 #ifdef NEW_LOGGING
  54                 LDAP_LOG (( "delete", LDAP_LEVEL_DETAIL1,
  55                         "==> bdb_delete: retrying...\n" ));
  56 #else
  57                 Debug( LDAP_DEBUG_TRACE, "==> bdb_delete: retrying...\n",
  58                         0, 0, 0 );
  59 #endif
  60                 rc = TXN_ABORT( ltid );
  61                 ltid = NULL;
  62                 op->o_private = NULL;
  63                 if( rc != 0 ) {
  64                         rc = LDAP_OTHER;
  65                         text = "internal error";
  66                         goto return_results;
  67                 }
  68                 ldap_pvt_thread_yield();
  69         }
  70
  71         /* begin transaction */
  72         rc = TXN_BEGIN( bdb->bi_dbenv, NULL, &ltid,
  73                 bdb->bi_db_opflags );
  74         text = NULL;
  75         if( rc != 0 ) {
  76 #ifdef NEW_LOGGING
  77                 LDAP_LOG (( "delete", LDAP_LEVEL_ERR,
  78                         "==> bdb_delete: txn_begin failed: %s (%d)\n",
  79                         db_strerror(rc), rc ));
  80 #else
  81                 Debug( LDAP_DEBUG_TRACE,
  82                         "bdb_delete: txn_begin failed: %s (%d)\n",
  83                         db_strerror(rc), rc, 0 );
  84 #endif
  85                 rc = LDAP_OTHER;
  86                 text = "internal error";
  87                 goto return_results;
  88         }
  89 #if 0
  90         lockid = TXN_ID( ltid );
  91 #endif
  92
  93         opinfo.boi_bdb = be;
  94         opinfo.boi_txn = ltid;
  95         opinfo.boi_err = 0;
  96         op->o_private = &opinfo;
  97
  98         if ( !be_issuffix( be, ndn ) ) {
  99                 dnParent( ndn, &pdn );
 100         }
 101
 102         if( pdn.bv_len != 0 ) {
 103 #if 0
 104                 if ( ltid ) {
 105                         DBT obj;
 106                         obj.data = pdn.bv_val-1;
 107                         obj.size = pdn.bv_len+1;
 108                         rc = LOCK_GET( bdb->bi_dbenv, lockid, 0, &obj,
 109                                 DB_LOCK_WRITE, &lock);
 110                 }
 111 #endif
 112                 /* get parent */
 113                 rc = bdb_dn2entry_r( be, ltid, &pdn, &p, NULL, 0 );
 114
 115                 switch( rc ) {
 116                 case 0:
 117                 case DB_NOTFOUND:
 118                         break;
 119                 case DB_LOCK_DEADLOCK:
 120                 case DB_LOCK_NOTGRANTED:
 121                         goto retry;
 122                 default:
 123                         rc = LDAP_OTHER;
 124                         text = "internal error";
 125                         goto return_results;
 126                 }
 127
 128                 if( p == NULL) {
 129 #ifdef NEW_LOGGING
 130                         LDAP_LOG (( "delete", LDAP_LEVEL_DETAIL1,
 131                                 "<=- bdb_delete: parent does not exist\n" ));
 132 #else
 133                         Debug( LDAP_DEBUG_TRACE,
 134                                 "<=- bdb_delete: parent does not exist\n",
 135                                 0, 0, 0);
 136 #endif
 137                         rc = LDAP_OTHER;
 138                         text = "could not locate parent of entry";
 139                         goto return_results;
 140                 }
 141
 142                 /* check parent for "children" acl */
 143                 rc = access_allowed( be, conn, op, p,
 144                         children, NULL, ACL_WRITE, NULL );
 145
 146                 bdb_cache_return_entry_r(&bdb->bi_cache, p);
 147                 p = NULL;
 148
 149                 switch( opinfo.boi_err ) {
 150                 case DB_LOCK_DEADLOCK:
 151                 case DB_LOCK_NOTGRANTED:
 152                         goto retry;
 153                 }
 154
 155                 if ( !rc  ) {
 156 #ifdef NEW_LOGGING
 157                         LDAP_LOG (( "delete", LDAP_LEVEL_DETAIL1,
 158                                 "<=- bdb_delete: no access to parent\n" ));
 159 #else
 160                         Debug( LDAP_DEBUG_TRACE,
 161                                 "<=- bdb_delete: no access to parent\n",
 162                                 0, 0, 0 );
 163 #endif
 164                         rc = LDAP_INSUFFICIENT_ACCESS;
 165                         goto return_results;
 166                 }
 167
 168         } else {
 169                 /* no parent, must be root to delete */
 170                 if( ! be_isroot( be, &op->o_ndn ) ) {
 171                         if ( be_issuffix( be, (struct berval *)&slap_empty_bv )
 172                                 || be_isupdate( be, &op->o_ndn ) ) {
 173                                 p = (Entry *)&slap_entry_root;
 174
 175                                 /* check parent for "children" acl */
 176                                 rc = access_allowed( be, conn, op, p,
 177                                         children, NULL, ACL_WRITE, NULL );
 178                                 p = NULL;
 179
 180                                 switch( opinfo.boi_err ) {
 181                                 case DB_LOCK_DEADLOCK:
 182                                 case DB_LOCK_NOTGRANTED:
 183                                         goto retry;
 184                                 }
 185
 186                                 if ( !rc  ) {
 187 #ifdef NEW_LOGGING
 188                                         LDAP_LOG (( "delete", LDAP_LEVEL_DETAIL1,
 189                                                 "<=- bdb_delete: no access to parent\n" ));
 190 #else
 191                                         Debug( LDAP_DEBUG_TRACE,
 192                                                 "<=- bdb_delete: no access "
 193                                                 "to parent\n", 0, 0, 0 );
 194 #endif
 195                                         rc = LDAP_INSUFFICIENT_ACCESS;
 196                                         goto return_results;
 197                                 }
 198
 199                         } else {
 200 #ifdef NEW_LOGGING
 201                                 LDAP_LOG (( "delete", LDAP_LEVEL_DETAIL1,
 202                                         "<=- bdb_delete: no parent and not root\n" ));
 203 #else
 204                                 Debug( LDAP_DEBUG_TRACE,
 205                                         "<=- bdb_delete: no parent "
 206                                         "and not root\n", 0, 0, 0);
 207 #endif
 208                                 rc = LDAP_INSUFFICIENT_ACCESS;
 209                                 goto return_results;
 210                         }
 211                 }
 212
 213 #if 0
 214                 if ( ltid ) {
 215                         DBT obj;
 216                         obj.data = ",";
 217                         obj.size = 1;
 218                         rc = LOCK_GET( bdb->bi_dbenv, lockid, 0, &obj,
 219                                 DB_LOCK_WRITE, &lock);
 220                 }
 221 #endif
 222         }
 223
 224         /* get entry for read/modify/write */
 225         rc = bdb_dn2entry_w( be, ltid, ndn, &e, &matched, DB_RMW );
 226
 227         switch( rc ) {
 228         case 0:
 229         case DB_NOTFOUND:
 230                 break;
 231         case DB_LOCK_DEADLOCK:
 232         case DB_LOCK_NOTGRANTED:
 233                 goto retry;
 234         default:
 235                 rc = LDAP_OTHER;
 236                 text = "internal error";
 237                 goto return_results;
 238         }
 239
 240         if ( e == NULL ) {
 241                 char *matched_dn = NULL;
 242                 BerVarray refs;
 243
 244 #ifdef NEW_LOGGING
 245                 LDAP_LOG (( "delete", LDAP_LEVEL_ARGS,
 246                         "<=- bdb_delete: no such object %s\n",
 247                         dn->bv_val ));
 248 #else
 249                 Debug( LDAP_DEBUG_ARGS,
 250                         "<=- bdb_delete: no such object %s\n",
 251                         dn->bv_val, 0, 0);
 252 #endif
 253
 254                 if ( matched != NULL ) {
 255                         matched_dn = ch_strdup( matched->e_dn );
 256                         refs = is_entry_referral( matched )
 257                                 ? get_entry_referrals( be, conn, op, matched )
 258                                 : NULL;
 259                         bdb_cache_return_entry_r(&bdb->bi_cache, matched );
 260                         matched = NULL;
 261
 262                 } else {
 263                         refs = referral_rewrite( default_referral,
 264                                 NULL, dn, LDAP_SCOPE_DEFAULT );
 265                 }
 266
 267                 send_ldap_result( conn, op, LDAP_REFERRAL,
 268                         matched_dn, NULL, refs, NULL );
 269
 270                 ber_bvarray_free( refs );
 271                 free( matched_dn );
 272
 273                 rc = -1;
 274                 goto done;
 275         }
 276
 277         if ( !manageDSAit && is_entry_referral( e ) ) {
 278                 /* entry is a referral, don't allow delete */
 279                 BerVarray refs = get_entry_referrals( be,
 280                         conn, op, e );
 281
 282 #ifdef NEW_LOGGING
 283                 LDAP_LOG (( "delete", LDAP_LEVEL_DETAIL1,
 284                         "<=- bdb_delete: entry is referral\n" ));
 285 #else
 286                 Debug( LDAP_DEBUG_TRACE,
 287                         "bdb_delete: entry is referral\n",
 288                         0, 0, 0 );
 289 #endif
 290
 291                 send_ldap_result( conn, op, LDAP_REFERRAL,
 292                         e->e_dn, NULL, refs, NULL );
 293
 294                 ber_bvarray_free( refs );
 295
 296                 rc = 1;
 297                 goto done;
 298         }
 299
 300         rc = bdb_dn2id_children( be, ltid, &e->e_nname );
 301         if( rc != DB_NOTFOUND ) {
 302                 switch( rc ) {
 303                 case DB_LOCK_DEADLOCK:
 304                 case DB_LOCK_NOTGRANTED:
 305                         goto retry;
 306                 case 0:
 307 #ifdef NEW_LOGGING
 308                         LDAP_LOG (( "delete", LDAP_LEVEL_DETAIL1,
 309                                 "<=- bdb_delete: non-leaf %s\n",
 310                                 dn->bv_val ));
 311 #else
 312                         Debug(LDAP_DEBUG_ARGS,
 313                                 "<=- bdb_delete: non-leaf %s\n",
 314                                 dn->bv_val, 0, 0);
 315 #endif
 316                         rc = LDAP_NOT_ALLOWED_ON_NONLEAF;
 317                         text = "subtree delete not supported";
 318                         break;
 319                 default:
 320 #ifdef NEW_LOGGING
 321                         LDAP_LOG (( "delete", LDAP_LEVEL_ERR,
 322                                 "<=- bdb_delete: has_children failed %s (%d)\n",
 323                                 db_strerror(rc), rc ));
 324 #else
 325                         Debug(LDAP_DEBUG_ARGS,
 326                                 "<=- bdb_delete: has_children failed: %s (%d)\n",
 327                                 db_strerror(rc), rc, 0 );
 328 #endif
 329                         rc = LDAP_OTHER;
 330                         text = "internal error";
 331                 }
 332                 goto return_results;
 333         }
 334
 335         /* delete from dn2id */
 336         rc = bdb_dn2id_delete( be, ltid, pdn.bv_val, e );
 337         if ( rc != 0 ) {
 338                 switch( rc ) {
 339                 case DB_LOCK_DEADLOCK:
 340                 case DB_LOCK_NOTGRANTED:
 341                         goto retry;
 342                 default:
 343                         rc = LDAP_OTHER;
 344                 }
 345 #ifdef NEW_LOGGING
 346                 LDAP_LOG (( "delete", LDAP_LEVEL_ERR,
 347                         "<=- bdb_delete: dn2id failed %s (%d)\n",
 348                         db_strerror(rc), rc ));
 349 #else
 350                 Debug(LDAP_DEBUG_ARGS,
 351                         "<=- bdb_delete: dn2id failed: %s (%d)\n",
 352                         db_strerror(rc), rc, 0 );
 353 #endif
 354                 text = "DN index delete failed";
 355                 goto return_results;
 356         }
 357
 358         /* delete from id2entry */
 359         rc = bdb_id2entry_delete( be, ltid, e );
 360         if ( rc != 0 ) {
 361                 switch( rc ) {
 362                 case DB_LOCK_DEADLOCK:
 363                 case DB_LOCK_NOTGRANTED:
 364                         goto retry;
 365                 default:
 366                         rc = LDAP_OTHER;
 367                 }
 368 #ifdef NEW_LOGGING
 369                 LDAP_LOG (( "delete", LDAP_LEVEL_ERR,
 370                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 371                         db_strerror(rc), rc ));
 372 #else
 373                 Debug(LDAP_DEBUG_ARGS,
 374                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 375                         db_strerror(rc), rc, 0 );
 376 #endif
 377                 text = "entry delete failed";
 378                 goto return_results;
 379         }
 380
 381         /* delete indices for old attributes */
 382         rc = bdb_index_entry_del( be, ltid, e, e->e_attrs );
 383         if ( rc != LDAP_SUCCESS ) {
 384                 switch( rc ) {
 385                 case DB_LOCK_DEADLOCK:
 386                 case DB_LOCK_NOTGRANTED:
 387                         goto retry;
 388                 default:
 389                         rc = LDAP_OTHER;
 390                 }
 391 #ifdef NEW_LOGGING
 392                 LDAP_LOG (( "delete", LDAP_LEVEL_ERR,
 393                         "<=- bdb_delete: entry index delete failed!\n" ));
 394 #else
 395                 Debug( LDAP_DEBUG_ANY, "entry index delete failed!\n",
 396                         0, 0, 0 );
 397 #endif
 398                 text = "entry index delete failed";
 399                 goto return_results;
 400         }
 401
 402 #if 0   /* Do we want to reclaim deleted IDs? */
 403         ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
 404         if ( e->e_id == bdb->bi_lastid ) {
 405                 bdb_last_id( be, ltid );
 406         }
 407         ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
 408 #endif
 409
 410         if( op->o_noop ) {
 411                 rc = TXN_ABORT( ltid );
 412         } else {
 413                 rc = TXN_COMMIT( ltid, 0 );
 414         }
 415         ltid = NULL;
 416         op->o_private = NULL;
 417
 418         if( rc != 0 ) {
 419 #ifdef NEW_LOGGING
 420                 LDAP_LOG (( "delete", LDAP_LEVEL_ERR,
 421                         "bdb_delete: txn_%s failed: %s (%d)\n",
 422                         op->o_noop ? "abort (no-op)" : "commit",
 423                         db_strerror(rc), rc ));
 424 #else
 425                 Debug( LDAP_DEBUG_TRACE,
 426                         "bdb_delete: txn_%s failed: %s (%d)\n",
 427                         op->o_noop ? "abort (no-op)" : "commit",
 428                         db_strerror(rc), rc );
 429 #endif
 430                 rc = LDAP_OTHER;
 431                 text = "commit failed";
 432
 433         } else {
 434 #ifdef NEW_LOGGING
 435                 LDAP_LOG (( "delete", LDAP_LEVEL_RESULTS,
 436                         "bdb_delete: deleted%s id=%08lx db=\"%s\"\n",
 437                         op->o_noop ? " (no-op)" : "",
 438                         e->e_id, e->e_dn ));
 439 #else
 440                 Debug( LDAP_DEBUG_TRACE,
 441                         "bdb_delete: deleted%s id=%08lx dn=\"%s\"\n",
 442                         op->o_noop ? " (no-op)" : "",
 443                         e->e_id, e->e_dn );
 444 #endif
 445                 rc = LDAP_SUCCESS;
 446                 text = NULL;
 447         }
 448
 449 return_results:
 450         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 451
 452         if(rc == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 453                 ldap_pvt_thread_yield();
 454                 TXN_CHECKPOINT( bdb->bi_dbenv,
 455                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 456         }
 457
 458 done:
 459         /* free entry */
 460         if( e != NULL ) {
 461                 bdb_cache_return_entry_w(&bdb->bi_cache, e);
 462         }
 463
 464         if( ltid != NULL ) {
 465                 TXN_ABORT( ltid );
 466                 op->o_private = NULL;
 467         }
 468
 469         return rc;
 470 }