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         char    *pdn = 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
  36         Debug( LDAP_DEBUG_ARGS, "==> bdb_delete: %s\n",
  37                 dn->bv_val, 0, 0 );
  38
  39         if( 0 ) {
  40 retry:  /* transaction retry */
  41                 Debug( LDAP_DEBUG_TRACE, "==> bdb_delete: retrying...\n",
  42                         0, 0, 0 );
  43                 rc = txn_abort( ltid );
  44                 ltid = NULL;
  45                 op->o_private = NULL;
  46                 if( rc != 0 ) {
  47                         rc = LDAP_OTHER;
  48                         text = "internal error";
  49                         goto return_results;
  50                 }
  51         }
  52
  53         if( bdb->bi_txn ) {
  54                 /* begin transaction */
  55                 rc = txn_begin( bdb->bi_dbenv, NULL, &ltid,
  56                         bdb->bi_db_opflags );
  57                 text = NULL;
  58                 if( rc != 0 ) {
  59                         Debug( LDAP_DEBUG_TRACE,
  60                                 "bdb_delete: txn_begin failed: %s (%d)\n",
  61                                 db_strerror(rc), rc, 0 );
  62                         rc = LDAP_OTHER;
  63                         text = "internal error";
  64                         goto return_results;
  65                 }
  66         }
  67
  68         opinfo.boi_bdb = be;
  69         opinfo.boi_txn = ltid;
  70         opinfo.boi_err = 0;
  71         op->o_private = &opinfo;
  72
  73         /* get entry for read/modify/write */
  74         rc = bdb_dn2entry( be, ltid, ndn, &e, &matched, DB_RMW );
  75
  76         switch( rc ) {
  77         case 0:
  78         case DB_NOTFOUND:
  79                 break;
  80         case DB_LOCK_DEADLOCK:
  81         case DB_LOCK_NOTGRANTED:
  82                 goto retry;
  83         default:
  84                 rc = LDAP_OTHER;
  85                 text = "internal error";
  86                 goto return_results;
  87         }
  88
  89         if ( e == NULL ) {
  90                 char *matched_dn = NULL;
  91                 BerVarray refs;
  92
  93                 Debug( LDAP_DEBUG_ARGS,
  94                         "<=- bdb_delete: no such object %s\n",
  95                         dn->bv_val, 0, 0);
  96
  97                 if ( matched != NULL ) {
  98                         matched_dn = ch_strdup( matched->e_dn );
  99                         refs = is_entry_referral( matched )
 100                                 ? get_entry_referrals( be, conn, op, matched )
 101                                 : NULL;
 102                         bdb_entry_return( be, matched );
 103                         matched = NULL;
 104
 105                 } else {
 106                         refs = referral_rewrite( default_referral,
 107                                 NULL, dn, LDAP_SCOPE_DEFAULT );
 108                 }
 109
 110                 send_ldap_result( conn, op, LDAP_REFERRAL,
 111                         matched_dn, NULL, refs, NULL );
 112
 113                 ber_bvarray_free( refs );
 114                 free( matched_dn );
 115
 116                 rc = -1;
 117                 goto done;
 118         }
 119
 120         if ( be_issuffix( be, ndn->bv_val ) ) {
 121                 pdn = NULL;
 122         } else {
 123                 rc = dnParent( ndn->bv_val, &pdn );
 124                 if ( rc != LDAP_SUCCESS ) {
 125                         text = "internal error";
 126                         goto return_results;
 127                 }
 128         }
 129
 130         if( pdn != NULL && *pdn != '\0' ) {
 131                 struct berval pbv;
 132
 133                 pbv.bv_len = ndn->bv_len - (pdn - ndn->bv_val);
 134                 pbv.bv_val = pdn;
 135                 /* get parent */
 136                 rc = bdb_dn2entry( be, ltid, &pbv, &p, NULL, 0 );
 137
 138                 switch( rc ) {
 139                 case 0:
 140                 case DB_NOTFOUND:
 141                         break;
 142                 case DB_LOCK_DEADLOCK:
 143                 case DB_LOCK_NOTGRANTED:
 144                         goto retry;
 145                 default:
 146                         rc = LDAP_OTHER;
 147                         text = "internal error";
 148                         goto return_results;
 149                 }
 150
 151                 if( p == NULL) {
 152                         Debug( LDAP_DEBUG_TRACE,
 153                                 "<=- bdb_delete: parent does not exist\n",
 154                                 0, 0, 0);
 155                         rc = LDAP_OTHER;
 156                         text = "could not locate parent of entry";
 157                         goto return_results;
 158                 }
 159
 160                 /* check parent for "children" acl */
 161                 rc = access_allowed( be, conn, op, p,
 162                         children, NULL, ACL_WRITE );
 163
 164                 bdb_entry_return( be, p );
 165                 p = NULL;
 166
 167                 if ( !rc  ) {
 168                         Debug( LDAP_DEBUG_TRACE,
 169                                 "<=- bdb_delete: no access to parent\n",
 170                                 0, 0, 0 );
 171                         rc = LDAP_INSUFFICIENT_ACCESS;
 172                         goto return_results;
 173                 }
 174
 175         } else {
 176                 /* no parent, must be root to delete */
 177                 if( ! be_isroot( be, &op->o_ndn ) ) {
 178                         if ( be_issuffix( be, "" ) || be_isupdate( be, &op->o_ndn ) ) {
 179                                 p = (Entry *)&slap_entry_root;
 180
 181                                 /* check parent for "children" acl */
 182                                 rc = access_allowed( be, conn, op, p,
 183                                         children, NULL, ACL_WRITE );
 184                                 p = NULL;
 185
 186                                 if ( !rc  ) {
 187                                         Debug( LDAP_DEBUG_TRACE,
 188                                                 "<=- bdb_delete: no access "
 189                                                 "to parent\n", 0, 0, 0 );
 190                                         rc = LDAP_INSUFFICIENT_ACCESS;
 191                                         goto return_results;
 192                                 }
 193
 194                         } else {
 195                                 Debug( LDAP_DEBUG_TRACE,
 196                                         "<=- bdb_delete: no parent "
 197                                         "and not root\n", 0, 0, 0);
 198                                 rc = LDAP_INSUFFICIENT_ACCESS;
 199                                 goto return_results;
 200                         }
 201                 }
 202         }
 203
 204         if ( !manageDSAit && is_entry_referral( e ) ) {
 205                 /* parent is a referral, don't allow add */
 206                 /* parent is an alias, don't allow add */
 207                 BerVarray refs = get_entry_referrals( be,
 208                         conn, op, e );
 209
 210                 Debug( LDAP_DEBUG_TRACE,
 211                         "bdb_delete: entry is referral\n",
 212                         0, 0, 0 );
 213
 214                 send_ldap_result( conn, op, LDAP_REFERRAL,
 215                         e->e_dn, NULL, refs, NULL );
 216
 217                 ber_bvarray_free( refs );
 218
 219                 rc = 1;
 220                 goto done;
 221         }
 222
 223         rc = bdb_dn2id_children( be, ltid, &e->e_nname );
 224         if( rc != DB_NOTFOUND ) {
 225                 switch( rc ) {
 226                 case DB_LOCK_DEADLOCK:
 227                 case DB_LOCK_NOTGRANTED:
 228                         goto retry;
 229                 case 0:
 230                         Debug(LDAP_DEBUG_ARGS,
 231                                 "<=- bdb_delete: non-leaf %s\n",
 232                                 dn->bv_val, 0, 0);
 233                         rc = LDAP_NOT_ALLOWED_ON_NONLEAF;
 234                         text = "subtree delete not supported";
 235                         break;
 236                 default:
 237                         Debug(LDAP_DEBUG_ARGS,
 238                                 "<=- bdb_delete: has_children failed: %s (%d)\n",
 239                                 db_strerror(rc), rc, 0 );
 240                         rc = LDAP_OTHER;
 241                         text = "internal error";
 242                 }
 243                 goto return_results;
 244         }
 245
 246         /* delete from dn2id */
 247         rc = bdb_dn2id_delete( be, ltid, pdn, e );
 248         if ( rc != 0 ) {
 249                 switch( rc ) {
 250                 case DB_LOCK_DEADLOCK:
 251                 case DB_LOCK_NOTGRANTED:
 252                         goto retry;
 253                 default:
 254                         rc = LDAP_OTHER;
 255                 }
 256                 Debug(LDAP_DEBUG_ARGS,
 257                         "<=- bdb_delete: dn2id failed: %s (%d)\n",
 258                         db_strerror(rc), rc, 0 );
 259                 text = "DN index delete failed";
 260                 goto return_results;
 261         }
 262
 263         /* delete indices for old attributes */
 264         rc = bdb_index_entry_del( be, ltid, e, e->e_attrs );
 265         if ( rc != LDAP_SUCCESS ) {
 266                 switch( rc ) {
 267                 case DB_LOCK_DEADLOCK:
 268                 case DB_LOCK_NOTGRANTED:
 269                         goto retry;
 270                 default:
 271                         rc = LDAP_OTHER;
 272                 }
 273                 Debug( LDAP_DEBUG_ANY, "entry index delete failed!\n",
 274                         0, 0, 0 );
 275                 text = "entry index delete failed";
 276                 goto return_results;
 277         }
 278
 279         /* delete from id2entry */
 280         rc = bdb_id2entry_delete( be, ltid, e->e_id );
 281         if ( rc != 0 ) {
 282                 switch( rc ) {
 283                 case DB_LOCK_DEADLOCK:
 284                 case DB_LOCK_NOTGRANTED:
 285                         goto retry;
 286                 default:
 287                         rc = LDAP_OTHER;
 288                 }
 289                 Debug(LDAP_DEBUG_ARGS,
 290                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 291                         db_strerror(rc), rc, 0 );
 292                 text = "entry delete failed";
 293                 goto return_results;
 294         }
 295
 296
 297 #if 0   /* Do we want to reclaim deleted IDs? */
 298         ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
 299         if ( e->e_id == bdb->bi_lastid ) {
 300                 bdb_last_id( be, ltid );
 301         }
 302         ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
 303 #endif
 304
 305         if( bdb->bi_txn ) {
 306                 rc = txn_commit( ltid, 0 );
 307         }
 308         ltid = NULL;
 309         op->o_private = NULL;
 310
 311         if( rc != 0 ) {
 312                 Debug( LDAP_DEBUG_TRACE,
 313                         "bdb_delete: txn_commit failed: %s (%d)\n",
 314                         db_strerror(rc), rc, 0 );
 315                 rc = LDAP_OTHER;
 316                 text = "commit failed";
 317
 318         } else {
 319                 Debug( LDAP_DEBUG_TRACE,
 320                         "bdb_delete: deleted id=%08lx dn=\"%s\"\n",
 321                         e->e_id, e->e_dn, 0 );
 322                 rc = LDAP_SUCCESS;
 323                 text = NULL;
 324         }
 325
 326 return_results:
 327         send_ldap_result( conn, op, LDAP_SUCCESS,
 328                 NULL, text, NULL, NULL );
 329
 330         if(rc == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 331                 ldap_pvt_thread_yield();
 332                 TXN_CHECKPOINT( bdb->bi_dbenv,
 333                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 334         }
 335
 336 done:
 337         /* free entry */
 338         if( e != NULL ) {
 339                 bdb_entry_return( be, e );
 340         }
 341
 342         if( ltid != NULL ) {
 343                 txn_abort( ltid );
 344                 op->o_private = NULL;
 345         }
 346
 347         return rc;
 348 }