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                 Debug( LDAP_DEBUG_TRACE, "==> bdb_delete: retrying...\n",
  46                         0, 0, 0 );
  47                 rc = txn_abort( ltid );
  48                 ltid = NULL;
  49                 op->o_private = NULL;
  50                 if( rc != 0 ) {
  51                         rc = LDAP_OTHER;
  52                         text = "internal error";
  53                         goto return_results;
  54                 }
  55                 ldap_pvt_thread_yield();
  56         }
  57
  58         if( bdb->bi_txn ) {
  59                 /* begin transaction */
  60                 rc = txn_begin( bdb->bi_dbenv, NULL, &ltid,
  61                         bdb->bi_db_opflags );
  62                 text = NULL;
  63                 if( rc != 0 ) {
  64                         Debug( LDAP_DEBUG_TRACE,
  65                                 "bdb_delete: txn_begin failed: %s (%d)\n",
  66                                 db_strerror(rc), rc, 0 );
  67                         rc = LDAP_OTHER;
  68                         text = "internal error";
  69                         goto return_results;
  70                 }
  71 #if 0
  72                 lockid = TXN_ID( ltid );
  73 #endif
  74         }
  75
  76         opinfo.boi_bdb = be;
  77         opinfo.boi_txn = ltid;
  78         opinfo.boi_err = 0;
  79         op->o_private = &opinfo;
  80
  81         if ( !be_issuffix( be, ndn->bv_val ) ) {
  82                 rc = dnParent( ndn->bv_val, &pdn.bv_val );
  83                 if ( rc != LDAP_SUCCESS ) {
  84                         text = "internal error";
  85                         goto return_results;
  86                 }
  87                 if (pdn.bv_val && pdn.bv_val[0]) {
  88                         pdn.bv_len = ndn->bv_len - (pdn.bv_val - ndn->bv_val);
  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( 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_entry_return( be, 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, "" ) || be_isupdate( be, &op->o_ndn ) ) {
 152                                 p = (Entry *)&slap_entry_root;
 153
 154                                 /* check parent for "children" acl */
 155                                 rc = access_allowed( be, conn, op, p,
 156                                         children, NULL, ACL_WRITE );
 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                                         Debug( LDAP_DEBUG_TRACE,
 167                                                 "<=- bdb_delete: no access "
 168                                                 "to parent\n", 0, 0, 0 );
 169                                         rc = LDAP_INSUFFICIENT_ACCESS;
 170                                         goto return_results;
 171                                 }
 172
 173                         } else {
 174                                 Debug( LDAP_DEBUG_TRACE,
 175                                         "<=- bdb_delete: no parent "
 176                                         "and not root\n", 0, 0, 0);
 177                                 rc = LDAP_INSUFFICIENT_ACCESS;
 178                                 goto return_results;
 179                         }
 180                 }
 181
 182 #if 0
 183                 if ( ltid ) {
 184                         DBT obj;
 185                         obj.data = ",";
 186                         obj.size = 1;
 187                         rc = LOCK_GET( bdb->bi_dbenv, lockid, 0, &obj,
 188                                 DB_LOCK_WRITE, &lock);
 189                 }
 190 #endif
 191         }
 192
 193         /* get entry for read/modify/write */
 194         rc = bdb_dn2entry( be, ltid, ndn, &e, &matched, DB_RMW );
 195
 196         switch( rc ) {
 197         case 0:
 198         case DB_NOTFOUND:
 199                 break;
 200         case DB_LOCK_DEADLOCK:
 201         case DB_LOCK_NOTGRANTED:
 202                 goto retry;
 203         default:
 204                 rc = LDAP_OTHER;
 205                 text = "internal error";
 206                 goto return_results;
 207         }
 208
 209         if ( e == NULL ) {
 210                 char *matched_dn = NULL;
 211                 BerVarray refs;
 212
 213                 Debug( LDAP_DEBUG_ARGS,
 214                         "<=- bdb_delete: no such object %s\n",
 215                         dn->bv_val, 0, 0);
 216
 217                 if ( matched != NULL ) {
 218                         matched_dn = ch_strdup( matched->e_dn );
 219                         refs = is_entry_referral( matched )
 220                                 ? get_entry_referrals( be, conn, op, matched )
 221                                 : NULL;
 222                         bdb_entry_return( be, matched );
 223                         matched = NULL;
 224
 225                 } else {
 226                         refs = referral_rewrite( default_referral,
 227                                 NULL, dn, LDAP_SCOPE_DEFAULT );
 228                 }
 229
 230                 send_ldap_result( conn, op, LDAP_REFERRAL,
 231                         matched_dn, NULL, refs, NULL );
 232
 233                 ber_bvarray_free( refs );
 234                 free( matched_dn );
 235
 236                 rc = -1;
 237                 goto done;
 238         }
 239
 240         if ( !manageDSAit && is_entry_referral( e ) ) {
 241                 /* parent is a referral, don't allow add */
 242                 /* parent is an alias, don't allow add */
 243                 BerVarray refs = get_entry_referrals( be,
 244                         conn, op, e );
 245
 246                 Debug( LDAP_DEBUG_TRACE,
 247                         "bdb_delete: entry is referral\n",
 248                         0, 0, 0 );
 249
 250                 send_ldap_result( conn, op, LDAP_REFERRAL,
 251                         e->e_dn, NULL, refs, NULL );
 252
 253                 ber_bvarray_free( refs );
 254
 255                 rc = 1;
 256                 goto done;
 257         }
 258
 259         rc = bdb_dn2id_children( be, ltid, &e->e_nname );
 260         if( rc != DB_NOTFOUND ) {
 261                 switch( rc ) {
 262                 case DB_LOCK_DEADLOCK:
 263                 case DB_LOCK_NOTGRANTED:
 264                         goto retry;
 265                 case 0:
 266                         Debug(LDAP_DEBUG_ARGS,
 267                                 "<=- bdb_delete: non-leaf %s\n",
 268                                 dn->bv_val, 0, 0);
 269                         rc = LDAP_NOT_ALLOWED_ON_NONLEAF;
 270                         text = "subtree delete not supported";
 271                         break;
 272                 default:
 273                         Debug(LDAP_DEBUG_ARGS,
 274                                 "<=- bdb_delete: has_children failed: %s (%d)\n",
 275                                 db_strerror(rc), rc, 0 );
 276                         rc = LDAP_OTHER;
 277                         text = "internal error";
 278                 }
 279                 goto return_results;
 280         }
 281
 282         /* delete from dn2id */
 283         rc = bdb_dn2id_delete( be, ltid, pdn.bv_val, e );
 284         if ( rc != 0 ) {
 285                 switch( rc ) {
 286                 case DB_LOCK_DEADLOCK:
 287                 case DB_LOCK_NOTGRANTED:
 288                         goto retry;
 289                 default:
 290                         rc = LDAP_OTHER;
 291                 }
 292                 Debug(LDAP_DEBUG_ARGS,
 293                         "<=- bdb_delete: dn2id failed: %s (%d)\n",
 294                         db_strerror(rc), rc, 0 );
 295                 text = "DN index delete failed";
 296                 goto return_results;
 297         }
 298
 299         /* delete from id2entry */
 300         rc = bdb_id2entry_delete( be, ltid, e->e_id );
 301         if ( rc != 0 ) {
 302                 switch( rc ) {
 303                 case DB_LOCK_DEADLOCK:
 304                 case DB_LOCK_NOTGRANTED:
 305                         goto retry;
 306                 default:
 307                         rc = LDAP_OTHER;
 308                 }
 309                 Debug(LDAP_DEBUG_ARGS,
 310                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 311                         db_strerror(rc), rc, 0 );
 312                 text = "entry delete failed";
 313                 goto return_results;
 314         }
 315
 316         /* delete indices for old attributes */
 317         rc = bdb_index_entry_del( be, ltid, e, e->e_attrs );
 318         if ( rc != LDAP_SUCCESS ) {
 319                 switch( rc ) {
 320                 case DB_LOCK_DEADLOCK:
 321                 case DB_LOCK_NOTGRANTED:
 322                         goto retry;
 323                 default:
 324                         rc = LDAP_OTHER;
 325                 }
 326                 Debug( LDAP_DEBUG_ANY, "entry index delete failed!\n",
 327                         0, 0, 0 );
 328                 text = "entry index delete failed";
 329                 goto return_results;
 330         }
 331
 332 #if 0   /* Do we want to reclaim deleted IDs? */
 333         ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
 334         if ( e->e_id == bdb->bi_lastid ) {
 335                 bdb_last_id( be, ltid );
 336         }
 337         ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
 338 #endif
 339
 340         if( bdb->bi_txn ) {
 341                 rc = txn_commit( ltid, 0 );
 342         }
 343         ltid = NULL;
 344         op->o_private = NULL;
 345
 346         if( rc != 0 ) {
 347                 Debug( LDAP_DEBUG_TRACE,
 348                         "bdb_delete: txn_commit failed: %s (%d)\n",
 349                         db_strerror(rc), rc, 0 );
 350                 rc = LDAP_OTHER;
 351                 text = "commit failed";
 352
 353         } else {
 354                 Debug( LDAP_DEBUG_TRACE,
 355                         "bdb_delete: deleted id=%08lx dn=\"%s\"\n",
 356                         e->e_id, e->e_dn, 0 );
 357                 rc = LDAP_SUCCESS;
 358                 text = NULL;
 359         }
 360
 361 return_results:
 362         send_ldap_result( conn, op, LDAP_SUCCESS,
 363                 NULL, text, NULL, NULL );
 364
 365         if(rc == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 366                 ldap_pvt_thread_yield();
 367                 TXN_CHECKPOINT( bdb->bi_dbenv,
 368                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 369         }
 370
 371 done:
 372         /* free entry */
 373         if( e != NULL ) {
 374                 bdb_entry_return( be, e );
 375         }
 376
 377         if( ltid != NULL ) {
 378                 txn_abort( ltid );
 379                 op->o_private = NULL;
 380         }
 381
 382         return rc;
 383 }