git.sur5r.net Git - openldap/blob - servers/slapd/back-bdb/delete.c

   1 /* delete.c - ldbm backend delete routine */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2000 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
  15 int
  16 bdb_delete(
  17     Backend     *be,
  18     Connection  *conn,
  19     Operation   *op,
  20     const char  *dn,
  21     const char  *ndn
  22 )
  23 {
  24         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
  25         Entry   *matched;
  26         char    *pdn = NULL;
  27         Entry   *e, *p = NULL;
  28         int     rc;
  29         const char *text = NULL;
  30         int             manageDSAit = get_manageDSAit( op );
  31         AttributeDescription *children = slap_schema.si_ad_children;
  32         DB_TXN          *ltid = NULL;
  33
  34         Debug(LDAP_DEBUG_ARGS, "==> bdb_delete: %s\n", dn, 0, 0);
  35
  36         if (0) {
  37 retry:  rc = txn_abort( ltid );
  38                 ltid = NULL;
  39                 op->o_private = NULL;
  40                 if( rc != 0 ) {
  41                         rc = LDAP_OTHER;
  42                         text = "internal error";
  43                         goto return_results;
  44                 }
  45         }
  46
  47         /* begin transaction */
  48         rc = txn_begin( bdb->bi_dbenv, NULL, &ltid, 0 );
  49         if( rc != 0 ) {
  50                 Debug( LDAP_DEBUG_TRACE,
  51                         "bdb_delete: txn_begin failed: %s (%d)\n",
  52                         db_strerror(rc), rc, 0 );
  53                 rc = LDAP_OTHER;
  54                 text = "internal error";
  55                 goto return_results;
  56         }
  57
  58         op->o_private = ltid;
  59
  60         pdn = dn_parent( be, e->e_ndn );
  61
  62         if( pdn != NULL && *pdn != '\0' ) {
  63                 /* get parent with reader lock */
  64                 rc = dn2entry_r( be, ltid, pdn, &p, NULL );
  65
  66                 ch_free( pdn );
  67
  68                 switch( rc ) {
  69                 case DB_LOCK_DEADLOCK:
  70                 case DB_LOCK_NOTGRANTED:
  71                         goto retry;
  72                 default:
  73                         rc = LDAP_OTHER;
  74                         text = "internal error";
  75                         goto return_results;
  76                 }
  77
  78                 if( p == NULL) {
  79                         Debug( LDAP_DEBUG_TRACE,
  80                                 "<=- bdb_delete: parent does not exist\n",
  81                                 0, 0, 0);
  82                         rc = LDAP_OTHER;
  83                         text = "could not locate parent of entry";
  84                         goto return_results;
  85                 }
  86
  87                 /* check parent for "children" acl */
  88                 rc = access_allowed( be, conn, op, p,
  89                         children, NULL, ACL_WRITE );
  90
  91                 bdb_entry_return( be, p );
  92
  93                 if ( !rc  ) {
  94                         Debug( LDAP_DEBUG_TRACE,
  95                                 "<=- bdb_delete: no access to parent\n",
  96                                 0, 0, 0 );
  97                         rc = LDAP_INSUFFICIENT_ACCESS;
  98                         goto return_results;
  99                 }
 100
 101         } else {
 102                 ch_free( pdn );
 103
 104                 /* no parent, must be root to delete */
 105                 if( ! be_isroot( be, op->o_ndn ) ) {
 106                         Debug( LDAP_DEBUG_TRACE,
 107                                 "<=- bdb_delete: no parent and not root\n",
 108                                 0, 0, 0);
 109                         rc = LDAP_INSUFFICIENT_ACCESS;
 110                         goto return_results;
 111                 }
 112         }
 113
 114         /* get entry */
 115         rc = dn2entry_w( be, ltid, ndn, &e, &matched );
 116
 117         switch( rc ) {
 118         case DB_LOCK_DEADLOCK:
 119         case DB_LOCK_NOTGRANTED:
 120                 goto retry;
 121         default:
 122                 rc = LDAP_OTHER;
 123                 text = "internal error";
 124                 goto return_results;
 125         }
 126
 127         if ( e == NULL ) {
 128                 char *matched_dn = NULL;
 129                 struct berval **refs = NULL;
 130
 131                 Debug( LDAP_DEBUG_ARGS,
 132                         "<=- bdb_delete: no such object %s\n",
 133                         dn, 0, 0);
 134
 135                 if ( matched != NULL ) {
 136                         matched_dn = ch_strdup( matched->e_dn );
 137                         refs = is_entry_referral( matched )
 138                                 ? get_entry_referrals( be, conn, op, matched )
 139                                 : NULL;
 140                         bdb_entry_return( be, matched );
 141                 } else {
 142                         refs = default_referral;
 143                 }
 144
 145                 send_ldap_result( conn, op, LDAP_REFERRAL,
 146                         matched_dn, NULL, refs, NULL );
 147
 148                 if ( matched != NULL ) {
 149                         ber_bvecfree( refs );
 150                         free( matched_dn );
 151                 }
 152
 153                 rc = -1;
 154                 goto done;
 155         }
 156
 157     if ( !manageDSAit && is_entry_referral( e ) ) {
 158                 /* parent is a referral, don't allow add */
 159                 /* parent is an alias, don't allow add */
 160                 struct berval **refs = get_entry_referrals( be,
 161                         conn, op, e );
 162
 163                 Debug( LDAP_DEBUG_TRACE,
 164                         "bdb_delete: entry is referral\n",
 165                         0, 0, 0 );
 166
 167                 send_ldap_result( conn, op, LDAP_REFERRAL,
 168                     e->e_dn, NULL, refs, NULL );
 169
 170                 ber_bvecfree( refs );
 171
 172                 rc = 1;
 173                 goto done;
 174         }
 175
 176
 177         if ( bdb_has_children( be, e ) ) {
 178                 Debug(LDAP_DEBUG_ARGS,
 179                         "<=- bdb_delete: non leaf %s\n",
 180                         dn, 0, 0);
 181                 rc = LDAP_NOT_ALLOWED_ON_NONLEAF;
 182                 text = "subtree delete not supported";
 183                 goto return_results;
 184         }
 185
 186         /* delete from dn2id mapping */
 187         if ( bdb_dn2id_delete( be, e->e_ndn, e->e_id ) != 0 ) {
 188                 Debug(LDAP_DEBUG_ARGS,
 189                         "<=- ldbm_back_delete: operations error %s\n",
 190                         dn, 0, 0);
 191                 rc = LDAP_OTHER;
 192                 text = "DN index delete failed";
 193                 goto return_results;
 194         }
 195
 196         /* delete from disk and cache */
 197         if ( bdb_id2entry_delete( be, e ) != 0 ) {
 198                 Debug(LDAP_DEBUG_ARGS,
 199                         "<=- bdb_delete: operations error %s\n",
 200                         dn, 0, 0);
 201                 rc = LDAP_OTHER;
 202                 text = "entry delete failed";
 203                 goto return_results;
 204         }
 205
 206         rc = txn_commit( ltid, 0 );
 207         ltid = NULL;
 208         op->o_private = NULL;
 209
 210         if( rc == 0 ) {
 211                 Debug( LDAP_DEBUG_TRACE,
 212                         "bdb_add: txn_commit failed: %s (%d)\n",
 213                         db_strerror(rc), rc, 0 );
 214                 rc = LDAP_OTHER;
 215                 text = "commit failed";
 216         } else {
 217                 Debug( LDAP_DEBUG_TRACE,
 218                         "bdb_add: added id=%08x dn=\"%s\"\n",
 219                         e->e_id, e->e_dn, 0 );
 220                 rc = LDAP_SUCCESS;
 221                 text = NULL;
 222         }
 223
 224 return_results:
 225         send_ldap_result( conn, op, LDAP_SUCCESS,
 226                 NULL, text, NULL, NULL );
 227
 228 done:
 229         /* free entry and writer lock */
 230         bdb_entry_return( be, e );
 231
 232         if( ltid != NULL ) {
 233                 txn_abort( ltid );
 234                 op->o_private = NULL;
 235         }
 236
 237         return rc;
 238 }