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 = NULL;
  29         Entry   *p = NULL;
  30         int     rc;
  31         const char *text;
  32         int             manageDSAit = get_manageDSAit( op );
  33         AttributeDescription *children = slap_schema.si_ad_children;
  34         DB_TXN          *ltid = NULL;
  35         struct bdb_op_info opinfo;
  36
  37         u_int32_t       locker;
  38         DB_LOCK         lock;
  39 #if 0
  40         u_int32_t       lockid;
  41         DB_LOCK         lock;
  42 #endif
  43
  44 #ifdef NEW_LOGGING
  45         LDAP_LOG (( "delete", LDAP_LEVEL_ARGS, "==> bdb_delete: %s\n",
  46                 dn->bv_val ));
  47 #else
  48         Debug( LDAP_DEBUG_ARGS, "==> bdb_delete: %s\n",
  49                 dn->bv_val, 0, 0 );
  50 #endif
  51
  52         if( 0 ) {
  53 retry:  /* transaction retry */
  54                 if( e != NULL ) {
  55                         bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e);
  56                 }
  57 #ifdef NEW_LOGGING
  58                 LDAP_LOG (( "delete", LDAP_LEVEL_DETAIL1,
  59                         "==> bdb_delete: retrying...\n" ));
  60 #else
  61                 Debug( LDAP_DEBUG_TRACE, "==> bdb_delete: retrying...\n",
  62                         0, 0, 0 );
  63 #endif
  64                 rc = TXN_ABORT( ltid );
  65                 ltid = NULL;
  66                 op->o_private = NULL;
  67                 if( rc != 0 ) {
  68                         rc = LDAP_OTHER;
  69                         text = "internal error";
  70                         goto return_results;
  71                 }
  72                 ldap_pvt_thread_yield();
  73         }
  74
  75         /* begin transaction */
  76         rc = TXN_BEGIN( bdb->bi_dbenv, NULL, &ltid,
  77                 bdb->bi_db_opflags );
  78         text = NULL;
  79         if( rc != 0 ) {
  80 #ifdef NEW_LOGGING
  81                 LDAP_LOG (( "delete", LDAP_LEVEL_ERR,
  82                         "==> bdb_delete: txn_begin failed: %s (%d)\n",
  83                         db_strerror(rc), rc ));
  84 #else
  85                 Debug( LDAP_DEBUG_TRACE,
  86                         "bdb_delete: txn_begin failed: %s (%d)\n",
  87                         db_strerror(rc), rc, 0 );
  88 #endif
  89                 rc = LDAP_OTHER;
  90                 text = "internal error";
  91                 goto return_results;
  92         }
  93
  94         locker = TXN_ID ( ltid );
  95 #if 0
  96         lockid = TXN_ID( ltid );
  97 #endif
  98
  99         opinfo.boi_bdb = be;
 100         opinfo.boi_txn = ltid;
 101         opinfo.boi_err = 0;
 102         op->o_private = &opinfo;
 103
 104         if ( !be_issuffix( be, ndn ) ) {
 105                 dnParent( ndn, &pdn );
 106         }
 107
 108         if( pdn.bv_len != 0 ) {
 109 #if 0
 110                 if ( ltid ) {
 111                         DBT obj;
 112                         obj.data = pdn.bv_val-1;
 113                         obj.size = pdn.bv_len+1;
 114                         rc = LOCK_GET( bdb->bi_dbenv, lockid, 0, &obj,
 115                                 DB_LOCK_WRITE, &lock);
 116                 }
 117 #endif
 118                 /* get parent */
 119                 rc = bdb_dn2entry_r( be, ltid, &pdn, &p, NULL, 0, locker, &lock );
 120
 121                 switch( rc ) {
 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                         text = "ldap server busy";
 130                         goto return_results;
 131                 default:
 132                         rc = LDAP_OTHER;
 133                         text = "internal error";
 134                         goto return_results;
 135                 }
 136
 137                 if( p == NULL) {
 138 #ifdef NEW_LOGGING
 139                         LDAP_LOG (( "delete", LDAP_LEVEL_DETAIL1,
 140                                 "<=- bdb_delete: parent does not exist\n" ));
 141 #else
 142                         Debug( LDAP_DEBUG_TRACE,
 143                                 "<=- bdb_delete: parent does not exist\n",
 144                                 0, 0, 0);
 145 #endif
 146                         rc = LDAP_OTHER;
 147                         text = "could not locate parent of entry";
 148                         goto return_results;
 149                 }
 150
 151                 /* check parent for "children" acl */
 152                 rc = access_allowed( be, conn, op, p,
 153                         children, NULL, ACL_WRITE, NULL );
 154
 155                 bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p);
 156                 p = NULL;
 157
 158                 switch( opinfo.boi_err ) {
 159                 case DB_LOCK_DEADLOCK:
 160                 case DB_LOCK_NOTGRANTED:
 161                         goto retry;
 162                 }
 163
 164                 if ( !rc  ) {
 165 #ifdef NEW_LOGGING
 166                         LDAP_LOG (( "delete", LDAP_LEVEL_DETAIL1,
 167                                 "<=- bdb_delete: no access to parent\n" ));
 168 #else
 169                         Debug( LDAP_DEBUG_TRACE,
 170                                 "<=- bdb_delete: no access to parent\n",
 171                                 0, 0, 0 );
 172 #endif
 173                         rc = LDAP_INSUFFICIENT_ACCESS;
 174                         goto return_results;
 175                 }
 176
 177         } else {
 178                 /* no parent, must be root to delete */
 179                 if( ! be_isroot( be, &op->o_ndn ) ) {
 180                         if ( be_issuffix( be, (struct berval *)&slap_empty_bv )
 181                                 || be_isupdate( be, &op->o_ndn ) ) {
 182                                 p = (Entry *)&slap_entry_root;
 183
 184                                 /* check parent for "children" acl */
 185                                 rc = access_allowed( be, conn, op, p,
 186                                         children, NULL, ACL_WRITE, NULL );
 187                                 p = NULL;
 188
 189                                 switch( opinfo.boi_err ) {
 190                                 case DB_LOCK_DEADLOCK:
 191                                 case DB_LOCK_NOTGRANTED:
 192                                         goto retry;
 193                                 }
 194
 195                                 if ( !rc  ) {
 196 #ifdef NEW_LOGGING
 197                                         LDAP_LOG (( "delete", LDAP_LEVEL_DETAIL1,
 198                                                 "<=- bdb_delete: no access to parent\n" ));
 199 #else
 200                                         Debug( LDAP_DEBUG_TRACE,
 201                                                 "<=- bdb_delete: no access "
 202                                                 "to parent\n", 0, 0, 0 );
 203 #endif
 204                                         rc = LDAP_INSUFFICIENT_ACCESS;
 205                                         goto return_results;
 206                                 }
 207
 208                         } else {
 209 #ifdef NEW_LOGGING
 210                                 LDAP_LOG (( "delete", LDAP_LEVEL_DETAIL1,
 211                                         "<=- bdb_delete: no parent and not root\n" ));
 212 #else
 213                                 Debug( LDAP_DEBUG_TRACE,
 214                                         "<=- bdb_delete: no parent "
 215                                         "and not root\n", 0, 0, 0);
 216 #endif
 217                                 rc = LDAP_INSUFFICIENT_ACCESS;
 218                                 goto return_results;
 219                         }
 220                 }
 221
 222 #if 0
 223                 if ( ltid ) {
 224                         DBT obj;
 225                         obj.data = ",";
 226                         obj.size = 1;
 227                         rc = LOCK_GET( bdb->bi_dbenv, lockid, 0, &obj,
 228                                 DB_LOCK_WRITE, &lock);
 229                 }
 230 #endif
 231         }
 232
 233         /* get entry for read/modify/write */
 234         rc = bdb_dn2entry_w( be, ltid, ndn, &e, &matched, DB_RMW, locker, &lock );
 235
 236         switch( rc ) {
 237         case 0:
 238         case DB_NOTFOUND:
 239                 break;
 240         case DB_LOCK_DEADLOCK:
 241         case DB_LOCK_NOTGRANTED:
 242                 goto retry;
 243         case LDAP_BUSY:
 244                 text = "ldap server busy";
 245                 goto return_results;
 246         default:
 247                 rc = LDAP_OTHER;
 248                 text = "internal error";
 249                 goto return_results;
 250         }
 251
 252         if ( e == NULL ) {
 253                 char *matched_dn = NULL;
 254                 BerVarray refs;
 255
 256 #ifdef NEW_LOGGING
 257                 LDAP_LOG (( "delete", LDAP_LEVEL_ARGS,
 258                         "<=- bdb_delete: no such object %s\n",
 259                         dn->bv_val ));
 260 #else
 261                 Debug( LDAP_DEBUG_ARGS,
 262                         "<=- bdb_delete: no such object %s\n",
 263                         dn->bv_val, 0, 0);
 264 #endif
 265
 266                 if ( matched != NULL ) {
 267                         matched_dn = ch_strdup( matched->e_dn );
 268                         refs = is_entry_referral( matched )
 269                                 ? get_entry_referrals( be, conn, op, matched )
 270                                 : NULL;
 271                         bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, matched);
 272                         matched = NULL;
 273
 274                 } else {
 275                         refs = referral_rewrite( default_referral,
 276                                 NULL, dn, LDAP_SCOPE_DEFAULT );
 277                 }
 278
 279                 send_ldap_result( conn, op, LDAP_REFERRAL,
 280                         matched_dn, NULL, refs, NULL );
 281
 282                 ber_bvarray_free( refs );
 283                 free( matched_dn );
 284
 285                 rc = -1;
 286                 goto done;
 287         }
 288
 289         if ( !manageDSAit && is_entry_referral( e ) ) {
 290                 /* entry is a referral, don't allow delete */
 291                 BerVarray refs = get_entry_referrals( be,
 292                         conn, op, e );
 293
 294 #ifdef NEW_LOGGING
 295                 LDAP_LOG (( "delete", LDAP_LEVEL_DETAIL1,
 296                         "<=- bdb_delete: entry is referral\n" ));
 297 #else
 298                 Debug( LDAP_DEBUG_TRACE,
 299                         "bdb_delete: entry is referral\n",
 300                         0, 0, 0 );
 301 #endif
 302
 303                 send_ldap_result( conn, op, LDAP_REFERRAL,
 304                         e->e_dn, NULL, refs, NULL );
 305
 306                 ber_bvarray_free( refs );
 307
 308                 rc = 1;
 309                 goto done;
 310         }
 311
 312         rc = bdb_dn2id_children( be, ltid, &e->e_nname, 0 );
 313         if( rc != DB_NOTFOUND ) {
 314                 switch( rc ) {
 315                 case DB_LOCK_DEADLOCK:
 316                 case DB_LOCK_NOTGRANTED:
 317                         goto retry;
 318                 case 0:
 319 #ifdef NEW_LOGGING
 320                         LDAP_LOG (( "delete", LDAP_LEVEL_DETAIL1,
 321                                 "<=- bdb_delete: non-leaf %s\n",
 322                                 dn->bv_val ));
 323 #else
 324                         Debug(LDAP_DEBUG_ARGS,
 325                                 "<=- bdb_delete: non-leaf %s\n",
 326                                 dn->bv_val, 0, 0);
 327 #endif
 328                         rc = LDAP_NOT_ALLOWED_ON_NONLEAF;
 329                         text = "subtree delete not supported";
 330                         break;
 331                 default:
 332 #ifdef NEW_LOGGING
 333                         LDAP_LOG (( "delete", LDAP_LEVEL_ERR,
 334                                 "<=- bdb_delete: has_children failed %s (%d)\n",
 335                                 db_strerror(rc), rc ));
 336 #else
 337                         Debug(LDAP_DEBUG_ARGS,
 338                                 "<=- bdb_delete: has_children failed: %s (%d)\n",
 339                                 db_strerror(rc), rc, 0 );
 340 #endif
 341                         rc = LDAP_OTHER;
 342                         text = "internal error";
 343                 }
 344                 goto return_results;
 345         }
 346
 347         /* delete from dn2id */
 348         rc = bdb_dn2id_delete( be, ltid, pdn.bv_val, e );
 349         if ( rc != 0 ) {
 350                 switch( rc ) {
 351                 case DB_LOCK_DEADLOCK:
 352                 case DB_LOCK_NOTGRANTED:
 353                         goto retry;
 354                 default:
 355                         rc = LDAP_OTHER;
 356                 }
 357 #ifdef NEW_LOGGING
 358                 LDAP_LOG (( "delete", LDAP_LEVEL_ERR,
 359                         "<=- bdb_delete: dn2id failed %s (%d)\n",
 360                         db_strerror(rc), rc ));
 361 #else
 362                 Debug(LDAP_DEBUG_ARGS,
 363                         "<=- bdb_delete: dn2id failed: %s (%d)\n",
 364                         db_strerror(rc), rc, 0 );
 365 #endif
 366                 text = "DN index delete failed";
 367                 goto return_results;
 368         }
 369
 370         /* delete from id2entry */
 371         rc = bdb_id2entry_delete( be, ltid, e );
 372         if ( rc != 0 ) {
 373                 switch( rc ) {
 374                 case DB_LOCK_DEADLOCK:
 375                 case DB_LOCK_NOTGRANTED:
 376                         goto retry;
 377                 default:
 378                         rc = LDAP_OTHER;
 379                 }
 380 #ifdef NEW_LOGGING
 381                 LDAP_LOG (( "delete", LDAP_LEVEL_ERR,
 382                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 383                         db_strerror(rc), rc ));
 384 #else
 385                 Debug(LDAP_DEBUG_ARGS,
 386                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 387                         db_strerror(rc), rc, 0 );
 388 #endif
 389                 text = "entry delete failed";
 390                 goto return_results;
 391         }
 392
 393         /* delete indices for old attributes */
 394         rc = bdb_index_entry_del( be, ltid, e, e->e_attrs );
 395         if ( rc != LDAP_SUCCESS ) {
 396                 switch( rc ) {
 397                 case DB_LOCK_DEADLOCK:
 398                 case DB_LOCK_NOTGRANTED:
 399                         goto retry;
 400                 default:
 401                         rc = LDAP_OTHER;
 402                 }
 403 #ifdef NEW_LOGGING
 404                 LDAP_LOG (( "delete", LDAP_LEVEL_ERR,
 405                         "<=- bdb_delete: entry index delete failed!\n" ));
 406 #else
 407                 Debug( LDAP_DEBUG_ANY, "entry index delete failed!\n",
 408                         0, 0, 0 );
 409 #endif
 410                 text = "entry index delete failed";
 411                 goto return_results;
 412         }
 413
 414 #if 0   /* Do we want to reclaim deleted IDs? */
 415         ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
 416         if ( e->e_id == bdb->bi_lastid ) {
 417                 bdb_last_id( be, ltid );
 418         }
 419         ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
 420 #endif
 421
 422         if( op->o_noop ) {
 423                 rc = TXN_ABORT( ltid );
 424         } else {
 425                 rc = TXN_COMMIT( ltid, 0 );
 426         }
 427         ltid = NULL;
 428         op->o_private = NULL;
 429
 430         if( rc != 0 ) {
 431 #ifdef NEW_LOGGING
 432                 LDAP_LOG (( "delete", LDAP_LEVEL_ERR,
 433                         "bdb_delete: txn_%s failed: %s (%d)\n",
 434                         op->o_noop ? "abort (no-op)" : "commit",
 435                         db_strerror(rc), rc ));
 436 #else
 437                 Debug( LDAP_DEBUG_TRACE,
 438                         "bdb_delete: txn_%s failed: %s (%d)\n",
 439                         op->o_noop ? "abort (no-op)" : "commit",
 440                         db_strerror(rc), rc );
 441 #endif
 442                 rc = LDAP_OTHER;
 443                 text = "commit failed";
 444
 445         } else {
 446 #ifdef NEW_LOGGING
 447                 LDAP_LOG (( "delete", LDAP_LEVEL_RESULTS,
 448                         "bdb_delete: deleted%s id=%08lx db=\"%s\"\n",
 449                         op->o_noop ? " (no-op)" : "",
 450                         e->e_id, e->e_dn ));
 451 #else
 452                 Debug( LDAP_DEBUG_TRACE,
 453                         "bdb_delete: deleted%s id=%08lx dn=\"%s\"\n",
 454                         op->o_noop ? " (no-op)" : "",
 455                         e->e_id, e->e_dn );
 456 #endif
 457                 rc = LDAP_SUCCESS;
 458                 text = NULL;
 459         }
 460
 461 return_results:
 462         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 463
 464         if(rc == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 465                 ldap_pvt_thread_yield();
 466                 TXN_CHECKPOINT( bdb->bi_dbenv,
 467                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 468         }
 469
 470 done:
 471         /* free entry */
 472         if( e != NULL ) {
 473                 bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e);
 474         }
 475
 476         if( ltid != NULL ) {
 477                 TXN_ABORT( ltid );
 478                 op->o_private = NULL;
 479         }
 480
 481         return rc;
 482 }