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         int             noop = 0;
  45
  46 #ifdef NEW_LOGGING
  47         LDAP_LOG ( OPERATION, ARGS,  "==> bdb_delete: %s\n", dn->bv_val, 0, 0 );
  48 #else
  49         Debug( LDAP_DEBUG_ARGS, "==> bdb_delete: %s\n",
  50                 dn->bv_val, 0, 0 );
  51 #endif
  52
  53         if( 0 ) {
  54 retry:  /* transaction retry */
  55                 if( e != NULL ) {
  56                         bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e);
  57                 }
  58 #ifdef NEW_LOGGING
  59                 LDAP_LOG ( OPERATION, DETAIL1,
  60                         "==> bdb_delete: retrying...\n", 0, 0, 0 );
  61 #else
  62                 Debug( LDAP_DEBUG_TRACE, "==> bdb_delete: retrying...\n",
  63                         0, 0, 0 );
  64 #endif
  65                 rc = TXN_ABORT( ltid );
  66                 ltid = NULL;
  67                 op->o_private = NULL;
  68                 if( rc != 0 ) {
  69                         rc = LDAP_OTHER;
  70                         text = "internal error";
  71                         goto return_results;
  72                 }
  73                 ldap_pvt_thread_yield();
  74         }
  75
  76         /* begin transaction */
  77         rc = TXN_BEGIN( bdb->bi_dbenv, NULL, &ltid,
  78                 bdb->bi_db_opflags );
  79         text = NULL;
  80         if( rc != 0 ) {
  81 #ifdef NEW_LOGGING
  82                 LDAP_LOG ( OPERATION, ERR,
  83                         "==> bdb_delete: txn_begin failed: %s (%d)\n",
  84                         db_strerror(rc), rc, 0 );
  85 #else
  86                 Debug( LDAP_DEBUG_TRACE,
  87                         "bdb_delete: txn_begin failed: %s (%d)\n",
  88                         db_strerror(rc), rc, 0 );
  89 #endif
  90                 rc = LDAP_OTHER;
  91                 text = "internal error";
  92                 goto return_results;
  93         }
  94
  95         locker = TXN_ID ( ltid );
  96 #if 0
  97         lockid = TXN_ID( ltid );
  98 #endif
  99
 100         opinfo.boi_bdb = be;
 101         opinfo.boi_txn = ltid;
 102         opinfo.boi_err = 0;
 103         op->o_private = &opinfo;
 104
 105         if ( !be_issuffix( be, ndn ) ) {
 106                 dnParent( ndn, &pdn );
 107         }
 108
 109         if( pdn.bv_len != 0 ) {
 110 #if 0
 111                 if ( ltid ) {
 112                         DBT obj;
 113                         obj.data = pdn.bv_val-1;
 114                         obj.size = pdn.bv_len+1;
 115                         rc = LOCK_GET( bdb->bi_dbenv, lockid, 0, &obj,
 116                                 DB_LOCK_WRITE, &lock);
 117                 }
 118 #endif
 119                 /* get parent */
 120                 rc = bdb_dn2entry_r( be, ltid, &pdn, &p, NULL, 0, locker, &lock );
 121
 122                 switch( rc ) {
 123                 case 0:
 124                 case DB_NOTFOUND:
 125                         break;
 126                 case DB_LOCK_DEADLOCK:
 127                 case DB_LOCK_NOTGRANTED:
 128                         goto retry;
 129                 case LDAP_BUSY:
 130                         text = "ldap server busy";
 131                         goto return_results;
 132                 default:
 133                         rc = LDAP_OTHER;
 134                         text = "internal error";
 135                         goto return_results;
 136                 }
 137
 138                 if( p == NULL) {
 139 #ifdef NEW_LOGGING
 140                         LDAP_LOG ( OPERATION, DETAIL1,
 141                                 "<=- bdb_delete: parent does not exist\n", 0, 0, 0 );
 142 #else
 143                         Debug( LDAP_DEBUG_TRACE,
 144                                 "<=- bdb_delete: parent does not exist\n",
 145                                 0, 0, 0);
 146 #endif
 147                         rc = LDAP_OTHER;
 148                         text = "could not locate parent of entry";
 149                         goto return_results;
 150                 }
 151
 152                 /* check parent for "children" acl */
 153                 rc = access_allowed( be, conn, op, p,
 154                         children, NULL, ACL_WRITE, NULL );
 155
 156                 bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p);
 157                 p = NULL;
 158
 159                 switch( opinfo.boi_err ) {
 160                 case DB_LOCK_DEADLOCK:
 161                 case DB_LOCK_NOTGRANTED:
 162                         goto retry;
 163                 }
 164
 165                 if ( !rc  ) {
 166 #ifdef NEW_LOGGING
 167                         LDAP_LOG ( OPERATION, DETAIL1,
 168                                 "<=- bdb_delete: no access to parent\n", 0, 0, 0 );
 169 #else
 170                         Debug( LDAP_DEBUG_TRACE,
 171                                 "<=- bdb_delete: no access to parent\n",
 172                                 0, 0, 0 );
 173 #endif
 174                         rc = LDAP_INSUFFICIENT_ACCESS;
 175                         goto return_results;
 176                 }
 177
 178         } else {
 179                 /* no parent, must be root to delete */
 180                 if( ! be_isroot( be, &op->o_ndn ) ) {
 181                         if ( be_issuffix( be, (struct berval *)&slap_empty_bv )
 182                                 || be_isupdate( be, &op->o_ndn ) ) {
 183                                 p = (Entry *)&slap_entry_root;
 184
 185                                 /* check parent for "children" acl */
 186                                 rc = access_allowed( be, conn, op, p,
 187                                         children, NULL, ACL_WRITE, NULL );
 188                                 p = NULL;
 189
 190                                 switch( opinfo.boi_err ) {
 191                                 case DB_LOCK_DEADLOCK:
 192                                 case DB_LOCK_NOTGRANTED:
 193                                         goto retry;
 194                                 }
 195
 196                                 if ( !rc  ) {
 197 #ifdef NEW_LOGGING
 198                                         LDAP_LOG ( OPERATION, DETAIL1,
 199                                                 "<=- bdb_delete: no access to parent\n", 0, 0, 0 );
 200 #else
 201                                         Debug( LDAP_DEBUG_TRACE,
 202                                                 "<=- bdb_delete: no access "
 203                                                 "to parent\n", 0, 0, 0 );
 204 #endif
 205                                         rc = LDAP_INSUFFICIENT_ACCESS;
 206                                         goto return_results;
 207                                 }
 208
 209                         } else {
 210 #ifdef NEW_LOGGING
 211                                 LDAP_LOG ( OPERATION, DETAIL1,
 212                                         "<=- bdb_delete: no parent and not root\n", 0, 0, 0 );
 213 #else
 214                                 Debug( LDAP_DEBUG_TRACE,
 215                                         "<=- bdb_delete: no parent "
 216                                         "and not root\n", 0, 0, 0);
 217 #endif
 218                                 rc = LDAP_INSUFFICIENT_ACCESS;
 219                                 goto return_results;
 220                         }
 221                 }
 222
 223 #if 0
 224                 if ( ltid ) {
 225                         DBT obj;
 226                         obj.data = ",";
 227                         obj.size = 1;
 228                         rc = LOCK_GET( bdb->bi_dbenv, lockid, 0, &obj,
 229                                 DB_LOCK_WRITE, &lock);
 230                 }
 231 #endif
 232         }
 233
 234         /* get entry for read/modify/write */
 235         rc = bdb_dn2entry_w( be, ltid, ndn, &e, &matched, DB_RMW, locker, &lock );
 236
 237         switch( rc ) {
 238         case 0:
 239         case DB_NOTFOUND:
 240                 break;
 241         case DB_LOCK_DEADLOCK:
 242         case DB_LOCK_NOTGRANTED:
 243                 goto retry;
 244         case LDAP_BUSY:
 245                 text = "ldap server busy";
 246                 goto return_results;
 247         default:
 248                 rc = LDAP_OTHER;
 249                 text = "internal error";
 250                 goto return_results;
 251         }
 252
 253         if ( e == NULL ) {
 254                 char *matched_dn = NULL;
 255                 BerVarray refs;
 256
 257 #ifdef NEW_LOGGING
 258                 LDAP_LOG ( OPERATION, ARGS,
 259                         "<=- bdb_delete: no such object %s\n", dn->bv_val, 0, 0);
 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 ( OPERATION, DETAIL1,
 296                         "<=- bdb_delete: entry is referral\n", 0, 0, 0 );
 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 ( OPERATION, DETAIL1,
 321                                 "<=- bdb_delete: non-leaf %s\n", dn->bv_val, 0, 0 );
 322 #else
 323                         Debug(LDAP_DEBUG_ARGS,
 324                                 "<=- bdb_delete: non-leaf %s\n",
 325                                 dn->bv_val, 0, 0);
 326 #endif
 327                         rc = LDAP_NOT_ALLOWED_ON_NONLEAF;
 328                         text = "subtree delete not supported";
 329                         break;
 330                 default:
 331 #ifdef NEW_LOGGING
 332                         LDAP_LOG ( OPERATION, ERR,
 333                                 "<=- bdb_delete: has_children failed %s (%d)\n",
 334                                 db_strerror(rc), rc, 0 );
 335 #else
 336                         Debug(LDAP_DEBUG_ARGS,
 337                                 "<=- bdb_delete: has_children failed: %s (%d)\n",
 338                                 db_strerror(rc), rc, 0 );
 339 #endif
 340                         rc = LDAP_OTHER;
 341                         text = "internal error";
 342                 }
 343                 goto return_results;
 344         }
 345
 346         /* delete from dn2id */
 347         rc = bdb_dn2id_delete( be, ltid, pdn.bv_val, e );
 348         if ( rc != 0 ) {
 349                 switch( rc ) {
 350                 case DB_LOCK_DEADLOCK:
 351                 case DB_LOCK_NOTGRANTED:
 352                         goto retry;
 353                 default:
 354                         rc = LDAP_OTHER;
 355                 }
 356 #ifdef NEW_LOGGING
 357                 LDAP_LOG ( OPERATION, ERR,
 358                         "<=- bdb_delete: dn2id failed %s (%d)\n", db_strerror(rc), rc, 0 );
 359 #else
 360                 Debug(LDAP_DEBUG_ARGS,
 361                         "<=- bdb_delete: dn2id failed: %s (%d)\n",
 362                         db_strerror(rc), rc, 0 );
 363 #endif
 364                 text = "DN index delete failed";
 365                 goto return_results;
 366         }
 367
 368         /* delete from id2entry */
 369         rc = bdb_id2entry_delete( be, ltid, e );
 370         if ( rc != 0 ) {
 371                 switch( rc ) {
 372                 case DB_LOCK_DEADLOCK:
 373                 case DB_LOCK_NOTGRANTED:
 374                         goto retry;
 375                 default:
 376                         rc = LDAP_OTHER;
 377                 }
 378 #ifdef NEW_LOGGING
 379                 LDAP_LOG ( OPERATION, ERR,
 380                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 381                         db_strerror(rc), rc, 0 );
 382 #else
 383                 Debug(LDAP_DEBUG_ARGS,
 384                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 385                         db_strerror(rc), rc, 0 );
 386 #endif
 387                 text = "entry delete failed";
 388                 goto return_results;
 389         }
 390
 391         /* delete indices for old attributes */
 392         rc = bdb_index_entry_del( be, ltid, e, e->e_attrs );
 393         if ( rc != LDAP_SUCCESS ) {
 394                 switch( rc ) {
 395                 case DB_LOCK_DEADLOCK:
 396                 case DB_LOCK_NOTGRANTED:
 397                         goto retry;
 398                 default:
 399                         rc = LDAP_OTHER;
 400                 }
 401 #ifdef NEW_LOGGING
 402                 LDAP_LOG ( OPERATION, ERR,
 403                         "<=- bdb_delete: entry index delete failed!\n", 0, 0, 0 );
 404 #else
 405                 Debug( LDAP_DEBUG_ANY, "entry index delete failed!\n",
 406                         0, 0, 0 );
 407 #endif
 408                 text = "entry index delete failed";
 409                 goto return_results;
 410         }
 411
 412 #if 0   /* Do we want to reclaim deleted IDs? */
 413         ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
 414         if ( e->e_id == bdb->bi_lastid ) {
 415                 bdb_last_id( be, ltid );
 416         }
 417         ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
 418 #endif
 419
 420         if( op->o_noop ) {
 421                 if ( ( rc = TXN_ABORT( ltid ) ) != 0 ) {
 422                         text = "txn_abort (no-op) failed";
 423                 } else {
 424                         noop = 1;
 425                         rc = LDAP_SUCCESS;
 426                 }
 427         } else {
 428                 rc = TXN_COMMIT( ltid, 0 );
 429         }
 430         ltid = NULL;
 431         op->o_private = NULL;
 432
 433         if( rc != 0 ) {
 434 #ifdef NEW_LOGGING
 435                 LDAP_LOG ( OPERATION, ERR,
 436                         "bdb_delete: txn_%s failed: %s (%d)\n",
 437                         op->o_noop ? "abort (no-op)" : "commit", db_strerror(rc), rc );
 438 #else
 439                 Debug( LDAP_DEBUG_TRACE,
 440                         "bdb_delete: txn_%s failed: %s (%d)\n",
 441                         op->o_noop ? "abort (no-op)" : "commit",
 442                         db_strerror(rc), rc );
 443 #endif
 444                 rc = LDAP_OTHER;
 445                 text = "commit failed";
 446
 447         } else {
 448 #ifdef NEW_LOGGING
 449                 LDAP_LOG ( OPERATION, RESULTS,
 450                         "bdb_delete: deleted%s id=%08lx db=\"%s\"\n",
 451                         op->o_noop ? " (no-op)" : "", e->e_id, e->e_dn );
 452 #else
 453                 Debug( LDAP_DEBUG_TRACE,
 454                         "bdb_delete: deleted%s id=%08lx dn=\"%s\"\n",
 455                         op->o_noop ? " (no-op)" : "",
 456                         e->e_id, e->e_dn );
 457 #endif
 458                 rc = LDAP_SUCCESS;
 459                 text = NULL;
 460         }
 461
 462 return_results:
 463         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 464
 465         if(rc == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 466                 ldap_pvt_thread_yield();
 467                 TXN_CHECKPOINT( bdb->bi_dbenv,
 468                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 469         }
 470
 471 done:
 472         /* free entry */
 473         if( e != NULL ) {
 474                 bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e);
 475         }
 476
 477         if( ltid != NULL ) {
 478                 TXN_ABORT( ltid );
 479                 op->o_private = NULL;
 480         }
 481
 482         return ( ( rc == LDAP_SUCCESS ) ? noop : rc );
 483 }