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                 case LDAP_BUSY:
 123                         text = "ldap server busy";
 124                         goto return_results;
 125                 default:
 126                         rc = LDAP_OTHER;
 127                         text = "internal error";
 128                         goto return_results;
 129                 }
 130
 131                 if( p == NULL) {
 132 #ifdef NEW_LOGGING
 133                         LDAP_LOG (( "delete", LDAP_LEVEL_DETAIL1,
 134                                 "<=- bdb_delete: parent does not exist\n" ));
 135 #else
 136                         Debug( LDAP_DEBUG_TRACE,
 137                                 "<=- bdb_delete: parent does not exist\n",
 138                                 0, 0, 0);
 139 #endif
 140                         rc = LDAP_OTHER;
 141                         text = "could not locate parent of entry";
 142                         goto return_results;
 143                 }
 144
 145                 /* check parent for "children" acl */
 146                 rc = access_allowed( be, conn, op, p,
 147                         children, NULL, ACL_WRITE, NULL );
 148
 149                 bdb_cache_return_entry_r(&bdb->bi_cache, p);
 150                 p = NULL;
 151
 152                 switch( opinfo.boi_err ) {
 153                 case DB_LOCK_DEADLOCK:
 154                 case DB_LOCK_NOTGRANTED:
 155                         goto retry;
 156                 }
 157
 158                 if ( !rc  ) {
 159 #ifdef NEW_LOGGING
 160                         LDAP_LOG (( "delete", LDAP_LEVEL_DETAIL1,
 161                                 "<=- bdb_delete: no access to parent\n" ));
 162 #else
 163                         Debug( LDAP_DEBUG_TRACE,
 164                                 "<=- bdb_delete: no access to parent\n",
 165                                 0, 0, 0 );
 166 #endif
 167                         rc = LDAP_INSUFFICIENT_ACCESS;
 168                         goto return_results;
 169                 }
 170
 171         } else {
 172                 /* no parent, must be root to delete */
 173                 if( ! be_isroot( be, &op->o_ndn ) ) {
 174                         if ( be_issuffix( be, (struct berval *)&slap_empty_bv )
 175                                 || be_isupdate( be, &op->o_ndn ) ) {
 176                                 p = (Entry *)&slap_entry_root;
 177
 178                                 /* check parent for "children" acl */
 179                                 rc = access_allowed( be, conn, op, p,
 180                                         children, NULL, ACL_WRITE, NULL );
 181                                 p = NULL;
 182
 183                                 switch( opinfo.boi_err ) {
 184                                 case DB_LOCK_DEADLOCK:
 185                                 case DB_LOCK_NOTGRANTED:
 186                                         goto retry;
 187                                 }
 188
 189                                 if ( !rc  ) {
 190 #ifdef NEW_LOGGING
 191                                         LDAP_LOG (( "delete", LDAP_LEVEL_DETAIL1,
 192                                                 "<=- bdb_delete: no access to parent\n" ));
 193 #else
 194                                         Debug( LDAP_DEBUG_TRACE,
 195                                                 "<=- bdb_delete: no access "
 196                                                 "to parent\n", 0, 0, 0 );
 197 #endif
 198                                         rc = LDAP_INSUFFICIENT_ACCESS;
 199                                         goto return_results;
 200                                 }
 201
 202                         } else {
 203 #ifdef NEW_LOGGING
 204                                 LDAP_LOG (( "delete", LDAP_LEVEL_DETAIL1,
 205                                         "<=- bdb_delete: no parent and not root\n" ));
 206 #else
 207                                 Debug( LDAP_DEBUG_TRACE,
 208                                         "<=- bdb_delete: no parent "
 209                                         "and not root\n", 0, 0, 0);
 210 #endif
 211                                 rc = LDAP_INSUFFICIENT_ACCESS;
 212                                 goto return_results;
 213                         }
 214                 }
 215
 216 #if 0
 217                 if ( ltid ) {
 218                         DBT obj;
 219                         obj.data = ",";
 220                         obj.size = 1;
 221                         rc = LOCK_GET( bdb->bi_dbenv, lockid, 0, &obj,
 222                                 DB_LOCK_WRITE, &lock);
 223                 }
 224 #endif
 225         }
 226
 227         /* get entry for read/modify/write */
 228         rc = bdb_dn2entry_w( be, ltid, ndn, &e, &matched, DB_RMW );
 229
 230         switch( rc ) {
 231         case 0:
 232         case DB_NOTFOUND:
 233                 break;
 234         case DB_LOCK_DEADLOCK:
 235         case DB_LOCK_NOTGRANTED:
 236                 goto retry;
 237         case LDAP_BUSY:
 238                 text = "ldap server busy";
 239                 goto return_results;
 240         default:
 241                 rc = LDAP_OTHER;
 242                 text = "internal error";
 243                 goto return_results;
 244         }
 245
 246         if ( e == NULL ) {
 247                 char *matched_dn = NULL;
 248                 BerVarray refs;
 249
 250 #ifdef NEW_LOGGING
 251                 LDAP_LOG (( "delete", LDAP_LEVEL_ARGS,
 252                         "<=- bdb_delete: no such object %s\n",
 253                         dn->bv_val ));
 254 #else
 255                 Debug( LDAP_DEBUG_ARGS,
 256                         "<=- bdb_delete: no such object %s\n",
 257                         dn->bv_val, 0, 0);
 258 #endif
 259
 260                 if ( matched != NULL ) {
 261                         matched_dn = ch_strdup( matched->e_dn );
 262                         refs = is_entry_referral( matched )
 263                                 ? get_entry_referrals( be, conn, op, matched )
 264                                 : NULL;
 265                         bdb_cache_return_entry_r(&bdb->bi_cache, matched );
 266                         matched = NULL;
 267
 268                 } else {
 269                         refs = referral_rewrite( default_referral,
 270                                 NULL, dn, LDAP_SCOPE_DEFAULT );
 271                 }
 272
 273                 send_ldap_result( conn, op, LDAP_REFERRAL,
 274                         matched_dn, NULL, refs, NULL );
 275
 276                 ber_bvarray_free( refs );
 277                 free( matched_dn );
 278
 279                 rc = -1;
 280                 goto done;
 281         }
 282
 283         if ( !manageDSAit && is_entry_referral( e ) ) {
 284                 /* entry is a referral, don't allow delete */
 285                 BerVarray refs = get_entry_referrals( be,
 286                         conn, op, e );
 287
 288 #ifdef NEW_LOGGING
 289                 LDAP_LOG (( "delete", LDAP_LEVEL_DETAIL1,
 290                         "<=- bdb_delete: entry is referral\n" ));
 291 #else
 292                 Debug( LDAP_DEBUG_TRACE,
 293                         "bdb_delete: entry is referral\n",
 294                         0, 0, 0 );
 295 #endif
 296
 297                 send_ldap_result( conn, op, LDAP_REFERRAL,
 298                         e->e_dn, NULL, refs, NULL );
 299
 300                 ber_bvarray_free( refs );
 301
 302                 rc = 1;
 303                 goto done;
 304         }
 305
 306         rc = bdb_dn2id_children( be, ltid, &e->e_nname );
 307         if( rc != DB_NOTFOUND ) {
 308                 switch( rc ) {
 309                 case DB_LOCK_DEADLOCK:
 310                 case DB_LOCK_NOTGRANTED:
 311                         goto retry;
 312                 case 0:
 313 #ifdef NEW_LOGGING
 314                         LDAP_LOG (( "delete", LDAP_LEVEL_DETAIL1,
 315                                 "<=- bdb_delete: non-leaf %s\n",
 316                                 dn->bv_val ));
 317 #else
 318                         Debug(LDAP_DEBUG_ARGS,
 319                                 "<=- bdb_delete: non-leaf %s\n",
 320                                 dn->bv_val, 0, 0);
 321 #endif
 322                         rc = LDAP_NOT_ALLOWED_ON_NONLEAF;
 323                         text = "subtree delete not supported";
 324                         break;
 325                 default:
 326 #ifdef NEW_LOGGING
 327                         LDAP_LOG (( "delete", LDAP_LEVEL_ERR,
 328                                 "<=- bdb_delete: has_children failed %s (%d)\n",
 329                                 db_strerror(rc), rc ));
 330 #else
 331                         Debug(LDAP_DEBUG_ARGS,
 332                                 "<=- bdb_delete: has_children failed: %s (%d)\n",
 333                                 db_strerror(rc), rc, 0 );
 334 #endif
 335                         rc = LDAP_OTHER;
 336                         text = "internal error";
 337                 }
 338                 goto return_results;
 339         }
 340
 341         /* delete from dn2id */
 342         rc = bdb_dn2id_delete( be, ltid, pdn.bv_val, e );
 343         if ( rc != 0 ) {
 344                 switch( rc ) {
 345                 case DB_LOCK_DEADLOCK:
 346                 case DB_LOCK_NOTGRANTED:
 347                         goto retry;
 348                 default:
 349                         rc = LDAP_OTHER;
 350                 }
 351 #ifdef NEW_LOGGING
 352                 LDAP_LOG (( "delete", LDAP_LEVEL_ERR,
 353                         "<=- bdb_delete: dn2id failed %s (%d)\n",
 354                         db_strerror(rc), rc ));
 355 #else
 356                 Debug(LDAP_DEBUG_ARGS,
 357                         "<=- bdb_delete: dn2id failed: %s (%d)\n",
 358                         db_strerror(rc), rc, 0 );
 359 #endif
 360                 text = "DN index delete failed";
 361                 goto return_results;
 362         }
 363
 364         /* delete from id2entry */
 365         rc = bdb_id2entry_delete( be, ltid, e );
 366         if ( rc != 0 ) {
 367                 switch( rc ) {
 368                 case DB_LOCK_DEADLOCK:
 369                 case DB_LOCK_NOTGRANTED:
 370                         goto retry;
 371                 default:
 372                         rc = LDAP_OTHER;
 373                 }
 374 #ifdef NEW_LOGGING
 375                 LDAP_LOG (( "delete", LDAP_LEVEL_ERR,
 376                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 377                         db_strerror(rc), rc ));
 378 #else
 379                 Debug(LDAP_DEBUG_ARGS,
 380                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 381                         db_strerror(rc), rc, 0 );
 382 #endif
 383                 text = "entry delete failed";
 384                 goto return_results;
 385         }
 386
 387         /* delete indices for old attributes */
 388         rc = bdb_index_entry_del( be, ltid, e, e->e_attrs );
 389         if ( rc != LDAP_SUCCESS ) {
 390                 switch( rc ) {
 391                 case DB_LOCK_DEADLOCK:
 392                 case DB_LOCK_NOTGRANTED:
 393                         goto retry;
 394                 default:
 395                         rc = LDAP_OTHER;
 396                 }
 397 #ifdef NEW_LOGGING
 398                 LDAP_LOG (( "delete", LDAP_LEVEL_ERR,
 399                         "<=- bdb_delete: entry index delete failed!\n" ));
 400 #else
 401                 Debug( LDAP_DEBUG_ANY, "entry index delete failed!\n",
 402                         0, 0, 0 );
 403 #endif
 404                 text = "entry index delete failed";
 405                 goto return_results;
 406         }
 407
 408 #if 0   /* Do we want to reclaim deleted IDs? */
 409         ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
 410         if ( e->e_id == bdb->bi_lastid ) {
 411                 bdb_last_id( be, ltid );
 412         }
 413         ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
 414 #endif
 415
 416         if( op->o_noop ) {
 417                 rc = TXN_ABORT( ltid );
 418         } else {
 419                 rc = TXN_COMMIT( ltid, 0 );
 420         }
 421         ltid = NULL;
 422         op->o_private = NULL;
 423
 424         if( rc != 0 ) {
 425 #ifdef NEW_LOGGING
 426                 LDAP_LOG (( "delete", LDAP_LEVEL_ERR,
 427                         "bdb_delete: txn_%s failed: %s (%d)\n",
 428                         op->o_noop ? "abort (no-op)" : "commit",
 429                         db_strerror(rc), rc ));
 430 #else
 431                 Debug( LDAP_DEBUG_TRACE,
 432                         "bdb_delete: txn_%s failed: %s (%d)\n",
 433                         op->o_noop ? "abort (no-op)" : "commit",
 434                         db_strerror(rc), rc );
 435 #endif
 436                 rc = LDAP_OTHER;
 437                 text = "commit failed";
 438
 439         } else {
 440 #ifdef NEW_LOGGING
 441                 LDAP_LOG (( "delete", LDAP_LEVEL_RESULTS,
 442                         "bdb_delete: deleted%s id=%08lx db=\"%s\"\n",
 443                         op->o_noop ? " (no-op)" : "",
 444                         e->e_id, e->e_dn ));
 445 #else
 446                 Debug( LDAP_DEBUG_TRACE,
 447                         "bdb_delete: deleted%s id=%08lx dn=\"%s\"\n",
 448                         op->o_noop ? " (no-op)" : "",
 449                         e->e_id, e->e_dn );
 450 #endif
 451                 rc = LDAP_SUCCESS;
 452                 text = NULL;
 453         }
 454
 455 return_results:
 456         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 457
 458         if(rc == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 459                 ldap_pvt_thread_yield();
 460                 TXN_CHECKPOINT( bdb->bi_dbenv,
 461                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 462         }
 463
 464 done:
 465         /* free entry */
 466         if( e != NULL ) {
 467                 bdb_cache_return_entry_w(&bdb->bi_cache, e);
 468         }
 469
 470         if( ltid != NULL ) {
 471                 TXN_ABORT( ltid );
 472                 op->o_private = NULL;
 473         }
 474
 475         return rc;
 476 }