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                 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, "" ) || be_isupdate( be, &op->o_ndn ) ) {
 146                                 p = (Entry *)&slap_entry_root;
 147
 148                                 /* check parent for "children" acl */
 149                                 rc = access_allowed( be, conn, op, p,
 150                                         children, NULL, ACL_WRITE );
 151                                 p = NULL;
 152
 153                                 if ( !rc  ) {
 154                                         Debug( LDAP_DEBUG_TRACE,
 155                                                 "<=- bdb_delete: no access "
 156                                                 "to parent\n", 0, 0, 0 );
 157                                         rc = LDAP_INSUFFICIENT_ACCESS;
 158                                         goto return_results;
 159                                 }
 160
 161                         } else {
 162                                 Debug( LDAP_DEBUG_TRACE,
 163                                         "<=- bdb_delete: no parent "
 164                                         "and not root\n", 0, 0, 0);
 165                                 rc = LDAP_INSUFFICIENT_ACCESS;
 166                                 goto return_results;
 167                         }
 168                 }
 169 #if 0
 170                 if ( ltid ) {
 171                         DBT obj;
 172                         obj.data = ",";
 173                         obj.size = 1;
 174                         rc = LOCK_GET( bdb->bi_dbenv, lockid, 0, &obj,
 175                                 DB_LOCK_WRITE, &lock);
 176                 }
 177 #endif
 178         }
 179
 180         /* get entry for read/modify/write */
 181         rc = bdb_dn2entry( be, ltid, ndn, &e, &matched, DB_RMW );
 182
 183         switch( rc ) {
 184         case 0:
 185         case DB_NOTFOUND:
 186                 break;
 187         case DB_LOCK_DEADLOCK:
 188         case DB_LOCK_NOTGRANTED:
 189                 goto retry;
 190         default:
 191                 rc = LDAP_OTHER;
 192                 text = "internal error";
 193                 goto return_results;
 194         }
 195
 196         if ( e == NULL ) {
 197                 char *matched_dn = NULL;
 198                 BerVarray refs;
 199
 200                 Debug( LDAP_DEBUG_ARGS,
 201                         "<=- bdb_delete: no such object %s\n",
 202                         dn->bv_val, 0, 0);
 203
 204                 if ( matched != NULL ) {
 205                         matched_dn = ch_strdup( matched->e_dn );
 206                         refs = is_entry_referral( matched )
 207                                 ? get_entry_referrals( be, conn, op, matched )
 208                                 : NULL;
 209                         bdb_entry_return( be, matched );
 210                         matched = NULL;
 211
 212                 } else {
 213                         refs = referral_rewrite( default_referral,
 214                                 NULL, dn, LDAP_SCOPE_DEFAULT );
 215                 }
 216
 217                 send_ldap_result( conn, op, LDAP_REFERRAL,
 218                         matched_dn, NULL, refs, NULL );
 219
 220                 ber_bvarray_free( refs );
 221                 free( matched_dn );
 222
 223                 rc = -1;
 224                 goto done;
 225         }
 226
 227         if ( !manageDSAit && is_entry_referral( e ) ) {
 228                 /* parent is a referral, don't allow add */
 229                 /* parent is an alias, don't allow add */
 230                 BerVarray refs = get_entry_referrals( be,
 231                         conn, op, e );
 232
 233                 Debug( LDAP_DEBUG_TRACE,
 234                         "bdb_delete: entry is referral\n",
 235                         0, 0, 0 );
 236
 237                 send_ldap_result( conn, op, LDAP_REFERRAL,
 238                         e->e_dn, NULL, refs, NULL );
 239
 240                 ber_bvarray_free( refs );
 241
 242                 rc = 1;
 243                 goto done;
 244         }
 245
 246         rc = bdb_dn2id_children( be, ltid, &e->e_nname );
 247         if( rc != DB_NOTFOUND ) {
 248                 switch( rc ) {
 249                 case DB_LOCK_DEADLOCK:
 250                 case DB_LOCK_NOTGRANTED:
 251                         goto retry;
 252                 case 0:
 253                         Debug(LDAP_DEBUG_ARGS,
 254                                 "<=- bdb_delete: non-leaf %s\n",
 255                                 dn->bv_val, 0, 0);
 256                         rc = LDAP_NOT_ALLOWED_ON_NONLEAF;
 257                         text = "subtree delete not supported";
 258                         break;
 259                 default:
 260                         Debug(LDAP_DEBUG_ARGS,
 261                                 "<=- bdb_delete: has_children failed: %s (%d)\n",
 262                                 db_strerror(rc), rc, 0 );
 263                         rc = LDAP_OTHER;
 264                         text = "internal error";
 265                 }
 266                 goto return_results;
 267         }
 268
 269         /* delete from dn2id */
 270         rc = bdb_dn2id_delete( be, ltid, pdn.bv_val, e );
 271         if ( rc != 0 ) {
 272                 switch( rc ) {
 273                 case DB_LOCK_DEADLOCK:
 274                 case DB_LOCK_NOTGRANTED:
 275                         goto retry;
 276                 default:
 277                         rc = LDAP_OTHER;
 278                 }
 279                 Debug(LDAP_DEBUG_ARGS,
 280                         "<=- bdb_delete: dn2id failed: %s (%d)\n",
 281                         db_strerror(rc), rc, 0 );
 282                 text = "DN index delete failed";
 283                 goto return_results;
 284         }
 285
 286         /* delete from id2entry */
 287         rc = bdb_id2entry_delete( be, ltid, e->e_id );
 288         if ( rc != 0 ) {
 289                 switch( rc ) {
 290                 case DB_LOCK_DEADLOCK:
 291                 case DB_LOCK_NOTGRANTED:
 292                         goto retry;
 293                 default:
 294                         rc = LDAP_OTHER;
 295                 }
 296                 Debug(LDAP_DEBUG_ARGS,
 297                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 298                         db_strerror(rc), rc, 0 );
 299                 text = "entry delete failed";
 300                 goto return_results;
 301         }
 302
 303         /* delete indices for old attributes */
 304         rc = bdb_index_entry_del( be, ltid, e, e->e_attrs );
 305         if ( rc != LDAP_SUCCESS ) {
 306                 switch( rc ) {
 307                 case DB_LOCK_DEADLOCK:
 308                 case DB_LOCK_NOTGRANTED:
 309                         goto retry;
 310                 default:
 311                         rc = LDAP_OTHER;
 312                 }
 313                 Debug( LDAP_DEBUG_ANY, "entry index delete failed!\n",
 314                         0, 0, 0 );
 315                 text = "entry index delete failed";
 316                 goto return_results;
 317         }
 318
 319 #if 0   /* Do we want to reclaim deleted IDs? */
 320         ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
 321         if ( e->e_id == bdb->bi_lastid ) {
 322                 bdb_last_id( be, ltid );
 323         }
 324         ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
 325 #endif
 326
 327         if( bdb->bi_txn ) {
 328                 rc = txn_commit( ltid, 0 );
 329         }
 330         ltid = NULL;
 331         op->o_private = NULL;
 332
 333         if( rc != 0 ) {
 334                 Debug( LDAP_DEBUG_TRACE,
 335                         "bdb_delete: txn_commit failed: %s (%d)\n",
 336                         db_strerror(rc), rc, 0 );
 337                 rc = LDAP_OTHER;
 338                 text = "commit failed";
 339
 340         } else {
 341                 Debug( LDAP_DEBUG_TRACE,
 342                         "bdb_delete: deleted id=%08lx dn=\"%s\"\n",
 343                         e->e_id, e->e_dn, 0 );
 344                 rc = LDAP_SUCCESS;
 345                 text = NULL;
 346         }
 347
 348 return_results:
 349         send_ldap_result( conn, op, LDAP_SUCCESS,
 350                 NULL, text, NULL, NULL );
 351
 352         if(rc == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 353                 ldap_pvt_thread_yield();
 354                 TXN_CHECKPOINT( bdb->bi_dbenv,
 355                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 356         }
 357
 358 done:
 359         /* free entry */
 360         if( e != NULL ) {
 361                 bdb_entry_return( be, e );
 362         }
 363
 364         if( ltid != NULL ) {
 365                 txn_abort( ltid );
 366                 op->o_private = NULL;
 367         }
 368
 369         return rc;
 370 }