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 ( OPERATION, ARGS,  "==> bdb_delete: %s\n", dn->bv_val, 0, 0 );
  46 #else
  47         Debug( LDAP_DEBUG_ARGS, "==> bdb_delete: %s\n",
  48                 dn->bv_val, 0, 0 );
  49 #endif
  50
  51         if( 0 ) {
  52 retry:  /* transaction retry */
  53                 if( e != NULL ) {
  54                         bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e);
  55                 }
  56 #ifdef NEW_LOGGING
  57                 LDAP_LOG ( OPERATION, DETAIL1,
  58                         "==> bdb_delete: retrying...\n", 0, 0, 0 );
  59 #else
  60                 Debug( LDAP_DEBUG_TRACE, "==> bdb_delete: retrying...\n",
  61                         0, 0, 0 );
  62 #endif
  63                 rc = TXN_ABORT( ltid );
  64                 ltid = NULL;
  65                 op->o_private = NULL;
  66                 if( rc != 0 ) {
  67                         rc = LDAP_OTHER;
  68                         text = "internal error";
  69                         goto return_results;
  70                 }
  71                 ldap_pvt_thread_yield();
  72         }
  73
  74         /* begin transaction */
  75         rc = TXN_BEGIN( bdb->bi_dbenv, NULL, &ltid,
  76                 bdb->bi_db_opflags );
  77         text = NULL;
  78         if( rc != 0 ) {
  79 #ifdef NEW_LOGGING
  80                 LDAP_LOG ( OPERATION, ERR,
  81                         "==> bdb_delete: txn_begin failed: %s (%d)\n",
  82                         db_strerror(rc), rc, 0 );
  83 #else
  84                 Debug( LDAP_DEBUG_TRACE,
  85                         "bdb_delete: txn_begin failed: %s (%d)\n",
  86                         db_strerror(rc), rc, 0 );
  87 #endif
  88                 rc = LDAP_OTHER;
  89                 text = "internal error";
  90                 goto return_results;
  91         }
  92
  93         locker = TXN_ID ( ltid );
  94 #if 0
  95         lockid = TXN_ID( ltid );
  96 #endif
  97
  98         opinfo.boi_bdb = be;
  99         opinfo.boi_txn = ltid;
 100         opinfo.boi_err = 0;
 101         op->o_private = &opinfo;
 102
 103         if ( !be_issuffix( be, ndn ) ) {
 104                 dnParent( ndn, &pdn );
 105         }
 106
 107         if( pdn.bv_len != 0 ) {
 108 #if 0
 109                 if ( ltid ) {
 110                         DBT obj;
 111                         obj.data = pdn.bv_val-1;
 112                         obj.size = pdn.bv_len+1;
 113                         rc = LOCK_GET( bdb->bi_dbenv, lockid, 0, &obj,
 114                                 DB_LOCK_WRITE, &lock);
 115                 }
 116 #endif
 117                 /* get parent */
 118                 rc = bdb_dn2entry_r( be, ltid, &pdn, &p, NULL, 0, locker, &lock );
 119
 120                 switch( rc ) {
 121                 case 0:
 122                 case DB_NOTFOUND:
 123                         break;
 124                 case DB_LOCK_DEADLOCK:
 125                 case DB_LOCK_NOTGRANTED:
 126                         goto retry;
 127                 case LDAP_BUSY:
 128                         text = "ldap server busy";
 129                         goto return_results;
 130                 default:
 131                         rc = LDAP_OTHER;
 132                         text = "internal error";
 133                         goto return_results;
 134                 }
 135
 136                 if( p == NULL) {
 137 #ifdef NEW_LOGGING
 138                         LDAP_LOG ( OPERATION, DETAIL1,
 139                                 "<=- bdb_delete: parent does not exist\n", 0, 0, 0 );
 140 #else
 141                         Debug( LDAP_DEBUG_TRACE,
 142                                 "<=- bdb_delete: parent does not exist\n",
 143                                 0, 0, 0);
 144 #endif
 145                         rc = LDAP_OTHER;
 146                         text = "could not locate parent of entry";
 147                         goto return_results;
 148                 }
 149
 150                 /* check parent for "children" acl */
 151                 rc = access_allowed( be, conn, op, p,
 152                         children, NULL, ACL_WRITE, NULL );
 153
 154                 bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p);
 155                 p = NULL;
 156
 157                 switch( opinfo.boi_err ) {
 158                 case DB_LOCK_DEADLOCK:
 159                 case DB_LOCK_NOTGRANTED:
 160                         goto retry;
 161                 }
 162
 163                 if ( !rc  ) {
 164 #ifdef NEW_LOGGING
 165                         LDAP_LOG ( OPERATION, DETAIL1,
 166                                 "<=- bdb_delete: no access to parent\n", 0, 0, 0 );
 167 #else
 168                         Debug( LDAP_DEBUG_TRACE,
 169                                 "<=- bdb_delete: no access to parent\n",
 170                                 0, 0, 0 );
 171 #endif
 172                         rc = LDAP_INSUFFICIENT_ACCESS;
 173                         goto return_results;
 174                 }
 175
 176         } else {
 177                 /* no parent, must be root to delete */
 178                 if( ! be_isroot( be, &op->o_ndn ) ) {
 179                         if ( be_issuffix( be, (struct berval *)&slap_empty_bv )
 180                                 || be_isupdate( be, &op->o_ndn ) ) {
 181                                 p = (Entry *)&slap_entry_root;
 182
 183                                 /* check parent for "children" acl */
 184                                 rc = access_allowed( be, conn, op, p,
 185                                         children, NULL, ACL_WRITE, NULL );
 186                                 p = NULL;
 187
 188                                 switch( opinfo.boi_err ) {
 189                                 case DB_LOCK_DEADLOCK:
 190                                 case DB_LOCK_NOTGRANTED:
 191                                         goto retry;
 192                                 }
 193
 194                                 if ( !rc  ) {
 195 #ifdef NEW_LOGGING
 196                                         LDAP_LOG ( OPERATION, DETAIL1,
 197                                                 "<=- bdb_delete: no access to parent\n", 0, 0, 0 );
 198 #else
 199                                         Debug( LDAP_DEBUG_TRACE,
 200                                                 "<=- bdb_delete: no access "
 201                                                 "to parent\n", 0, 0, 0 );
 202 #endif
 203                                         rc = LDAP_INSUFFICIENT_ACCESS;
 204                                         goto return_results;
 205                                 }
 206
 207                         } else {
 208 #ifdef NEW_LOGGING
 209                                 LDAP_LOG ( OPERATION, DETAIL1,
 210                                         "<=- bdb_delete: no parent and not root\n", 0, 0, 0 );
 211 #else
 212                                 Debug( LDAP_DEBUG_TRACE,
 213                                         "<=- bdb_delete: no parent "
 214                                         "and not root\n", 0, 0, 0);
 215 #endif
 216                                 rc = LDAP_INSUFFICIENT_ACCESS;
 217                                 goto return_results;
 218                         }
 219                 }
 220
 221 #if 0
 222                 if ( ltid ) {
 223                         DBT obj;
 224                         obj.data = ",";
 225                         obj.size = 1;
 226                         rc = LOCK_GET( bdb->bi_dbenv, lockid, 0, &obj,
 227                                 DB_LOCK_WRITE, &lock);
 228                 }
 229 #endif
 230         }
 231
 232         /* get entry for read/modify/write */
 233         rc = bdb_dn2entry_w( be, ltid, ndn, &e, &matched, DB_RMW, locker, &lock );
 234
 235         switch( rc ) {
 236         case 0:
 237         case DB_NOTFOUND:
 238                 break;
 239         case DB_LOCK_DEADLOCK:
 240         case DB_LOCK_NOTGRANTED:
 241                 goto retry;
 242         case LDAP_BUSY:
 243                 text = "ldap server busy";
 244                 goto return_results;
 245         default:
 246                 rc = LDAP_OTHER;
 247                 text = "internal error";
 248                 goto return_results;
 249         }
 250
 251         if ( e == NULL ) {
 252                 char *matched_dn = NULL;
 253                 BerVarray refs;
 254
 255 #ifdef NEW_LOGGING
 256                 LDAP_LOG ( OPERATION, ARGS,
 257                         "<=- bdb_delete: no such object %s\n", dn->bv_val, 0, 0);
 258 #else
 259                 Debug( LDAP_DEBUG_ARGS,
 260                         "<=- bdb_delete: no such object %s\n",
 261                         dn->bv_val, 0, 0);
 262 #endif
 263
 264                 if ( matched != NULL ) {
 265                         matched_dn = ch_strdup( matched->e_dn );
 266                         refs = is_entry_referral( matched )
 267                                 ? get_entry_referrals( be, conn, op, matched )
 268                                 : NULL;
 269                         bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, matched);
 270                         matched = NULL;
 271
 272                 } else {
 273                         refs = referral_rewrite( default_referral,
 274                                 NULL, dn, LDAP_SCOPE_DEFAULT );
 275                 }
 276
 277                 send_ldap_result( conn, op, LDAP_REFERRAL,
 278                         matched_dn, NULL, refs, NULL );
 279
 280                 ber_bvarray_free( refs );
 281                 free( matched_dn );
 282
 283                 rc = -1;
 284                 goto done;
 285         }
 286
 287         if ( !manageDSAit && is_entry_referral( e ) ) {
 288                 /* entry is a referral, don't allow delete */
 289                 BerVarray refs = get_entry_referrals( be,
 290                         conn, op, e );
 291
 292 #ifdef NEW_LOGGING
 293                 LDAP_LOG ( OPERATION, DETAIL1,
 294                         "<=- bdb_delete: entry is referral\n", 0, 0, 0 );
 295 #else
 296                 Debug( LDAP_DEBUG_TRACE,
 297                         "bdb_delete: entry is referral\n",
 298                         0, 0, 0 );
 299 #endif
 300
 301                 send_ldap_result( conn, op, LDAP_REFERRAL,
 302                         e->e_dn, NULL, refs, NULL );
 303
 304                 ber_bvarray_free( refs );
 305
 306                 rc = 1;
 307                 goto done;
 308         }
 309
 310         rc = bdb_dn2id_children( be, ltid, &e->e_nname, 0 );
 311         if( rc != DB_NOTFOUND ) {
 312                 switch( rc ) {
 313                 case DB_LOCK_DEADLOCK:
 314                 case DB_LOCK_NOTGRANTED:
 315                         goto retry;
 316                 case 0:
 317 #ifdef NEW_LOGGING
 318                         LDAP_LOG ( OPERATION, DETAIL1,
 319                                 "<=- bdb_delete: non-leaf %s\n", dn->bv_val, 0, 0 );
 320 #else
 321                         Debug(LDAP_DEBUG_ARGS,
 322                                 "<=- bdb_delete: non-leaf %s\n",
 323                                 dn->bv_val, 0, 0);
 324 #endif
 325                         rc = LDAP_NOT_ALLOWED_ON_NONLEAF;
 326                         text = "subtree delete not supported";
 327                         break;
 328                 default:
 329 #ifdef NEW_LOGGING
 330                         LDAP_LOG ( OPERATION, ERR,
 331                                 "<=- bdb_delete: has_children failed %s (%d)\n",
 332                                 db_strerror(rc), rc, 0 );
 333 #else
 334                         Debug(LDAP_DEBUG_ARGS,
 335                                 "<=- bdb_delete: has_children failed: %s (%d)\n",
 336                                 db_strerror(rc), rc, 0 );
 337 #endif
 338                         rc = LDAP_OTHER;
 339                         text = "internal error";
 340                 }
 341                 goto return_results;
 342         }
 343
 344         /* delete from dn2id */
 345         rc = bdb_dn2id_delete( be, ltid, pdn.bv_val, e );
 346         if ( rc != 0 ) {
 347                 switch( rc ) {
 348                 case DB_LOCK_DEADLOCK:
 349                 case DB_LOCK_NOTGRANTED:
 350                         goto retry;
 351                 default:
 352                         rc = LDAP_OTHER;
 353                 }
 354 #ifdef NEW_LOGGING
 355                 LDAP_LOG ( OPERATION, ERR,
 356                         "<=- bdb_delete: dn2id failed %s (%d)\n", db_strerror(rc), rc, 0 );
 357 #else
 358                 Debug(LDAP_DEBUG_ARGS,
 359                         "<=- bdb_delete: dn2id failed: %s (%d)\n",
 360                         db_strerror(rc), rc, 0 );
 361 #endif
 362                 text = "DN index delete failed";
 363                 goto return_results;
 364         }
 365
 366         /* delete from id2entry */
 367         rc = bdb_id2entry_delete( be, ltid, e );
 368         if ( rc != 0 ) {
 369                 switch( rc ) {
 370                 case DB_LOCK_DEADLOCK:
 371                 case DB_LOCK_NOTGRANTED:
 372                         goto retry;
 373                 default:
 374                         rc = LDAP_OTHER;
 375                 }
 376 #ifdef NEW_LOGGING
 377                 LDAP_LOG ( OPERATION, ERR,
 378                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 379                         db_strerror(rc), rc, 0 );
 380 #else
 381                 Debug(LDAP_DEBUG_ARGS,
 382                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 383                         db_strerror(rc), rc, 0 );
 384 #endif
 385                 text = "entry delete failed";
 386                 goto return_results;
 387         }
 388
 389         /* delete indices for old attributes */
 390         rc = bdb_index_entry_del( be, ltid, e, e->e_attrs );
 391         if ( rc != LDAP_SUCCESS ) {
 392                 switch( rc ) {
 393                 case DB_LOCK_DEADLOCK:
 394                 case DB_LOCK_NOTGRANTED:
 395                         goto retry;
 396                 default:
 397                         rc = LDAP_OTHER;
 398                 }
 399 #ifdef NEW_LOGGING
 400                 LDAP_LOG ( OPERATION, ERR,
 401                         "<=- bdb_delete: entry index delete failed!\n", 0, 0, 0 );
 402 #else
 403                 Debug( LDAP_DEBUG_ANY, "entry index delete failed!\n",
 404                         0, 0, 0 );
 405 #endif
 406                 text = "entry index delete failed";
 407                 goto return_results;
 408         }
 409
 410 #if 0   /* Do we want to reclaim deleted IDs? */
 411         ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
 412         if ( e->e_id == bdb->bi_lastid ) {
 413                 bdb_last_id( be, ltid );
 414         }
 415         ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
 416 #endif
 417
 418         if( op->o_noop ) {
 419                 rc = TXN_ABORT( ltid );
 420         } else {
 421                 rc = TXN_COMMIT( ltid, 0 );
 422         }
 423         ltid = NULL;
 424         op->o_private = NULL;
 425
 426         if( rc != 0 ) {
 427 #ifdef NEW_LOGGING
 428                 LDAP_LOG ( OPERATION, ERR,
 429                         "bdb_delete: txn_%s failed: %s (%d)\n",
 430                         op->o_noop ? "abort (no-op)" : "commit", 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 ( OPERATION, RESULTS,
 443                         "bdb_delete: deleted%s id=%08lx db=\"%s\"\n",
 444                         op->o_noop ? " (no-op)" : "", 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_unlocked_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 }