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