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