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