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