external/bsd/openldap/dist/servers/slapd/delete.c

   1 /* $OpenLDAP: pkg/ldap/servers/slapd/delete.c,v 1.138.2.3 2008/02/11 23:26:44 kurt Exp $ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1998-2008 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  16  * All rights reserved.
  17  *
  18  * Redistribution and use in source and binary forms are permitted
  19  * provided that this notice is preserved and that due credit is given
  20  * to the University of Michigan at Ann Arbor. The name of the University
  21  * may not be used to endorse or promote products derived from this
  22  * software without specific prior written permission. This software
  23  * is provided ``as is'' without express or implied warranty.
  24  */
  25
  26 #include "portable.h"
  27
  28 #include <stdio.h>
  29
  30 #include <ac/string.h>
  31 #include <ac/socket.h>
  32
  33 #include "slap.h"
  34
  35 #include "lutil.h"
  36
  37 int
  38 do_delete(
  39     Operation   *op,
  40     SlapReply   *rs )
  41 {
  42         struct berval dn = BER_BVNULL;
  43
  44         Debug( LDAP_DEBUG_TRACE, "%s do_delete\n",
  45                 op->o_log_prefix, 0, 0 );
  46         /*
  47          * Parse the delete request.  It looks like this:
  48          *
  49          *      DelRequest := DistinguishedName
  50          */
  51
  52         if ( ber_scanf( op->o_ber, "m", &dn ) == LBER_ERROR ) {
  53                 Debug( LDAP_DEBUG_ANY, "%s do_delete: ber_scanf failed\n",
  54                         op->o_log_prefix, 0, 0 );
  55                 send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
  56                 return SLAPD_DISCONNECT;
  57         }
  58
  59         if( get_ctrls( op, rs, 1 ) != LDAP_SUCCESS ) {
  60                 Debug( LDAP_DEBUG_ANY, "%s do_delete: get_ctrls failed\n",
  61                         op->o_log_prefix, 0, 0 );
  62                 goto cleanup;
  63         }
  64
  65         rs->sr_err = dnPrettyNormal( NULL, &dn, &op->o_req_dn, &op->o_req_ndn,
  66                 op->o_tmpmemctx );
  67         if( rs->sr_err != LDAP_SUCCESS ) {
  68                 Debug( LDAP_DEBUG_ANY, "%s do_delete: invalid dn (%s)\n",
  69                         op->o_log_prefix, dn.bv_val, 0 );
  70                 send_ldap_error( op, rs, LDAP_INVALID_DN_SYNTAX, "invalid DN" );
  71                 goto cleanup;
  72         }
  73
  74         Statslog( LDAP_DEBUG_STATS, "%s DEL dn=\"%s\"\n",
  75                 op->o_log_prefix, op->o_req_dn.bv_val, 0, 0, 0 );
  76
  77         if( op->o_req_ndn.bv_len == 0 ) {
  78                 Debug( LDAP_DEBUG_ANY, "%s do_delete: root dse!\n",
  79                         op->o_log_prefix, 0, 0 );
  80                 /* protocolError would likely be a more appropriate error */
  81                 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
  82                         "cannot delete the root DSE" );
  83                 goto cleanup;
  84
  85         } else if ( bvmatch( &op->o_req_ndn, &frontendDB->be_schemandn ) ) {
  86                 Debug( LDAP_DEBUG_ANY, "%s do_delete: subschema subentry!\n",
  87                         op->o_log_prefix, 0, 0 );
  88                 /* protocolError would likely be a more appropriate error */
  89                 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
  90                         "cannot delete the root DSE" );
  91                 goto cleanup;
  92         }
  93
  94         op->o_bd = frontendDB;
  95         rs->sr_err = frontendDB->be_delete( op, rs );
  96
  97 #ifdef LDAP_X_TXN
  98         if( rs->sr_err == LDAP_X_TXN_SPECIFY_OKAY ) {
  99                 /* skip cleanup */
 100                 return rs->sr_err;
 101         }
 102 #endif
 103
 104 cleanup:;
 105         op->o_tmpfree( op->o_req_dn.bv_val, op->o_tmpmemctx );
 106         op->o_tmpfree( op->o_req_ndn.bv_val, op->o_tmpmemctx );
 107         return rs->sr_err;
 108 }
 109
 110 int
 111 fe_op_delete( Operation *op, SlapReply *rs )
 112 {
 113         struct berval   pdn = BER_BVNULL;
 114         BackendDB       *op_be, *bd = op->o_bd;
 115
 116         /*
 117          * We could be serving multiple database backends.  Select the
 118          * appropriate one, or send a referral to our "referral server"
 119          * if we don't hold it.
 120          */
 121         op->o_bd = select_backend( &op->o_req_ndn, 1 );
 122         if ( op->o_bd == NULL ) {
 123                 op->o_bd = bd;
 124                 rs->sr_ref = referral_rewrite( default_referral,
 125                         NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 126
 127                 if (!rs->sr_ref) rs->sr_ref = default_referral;
 128                 if ( rs->sr_ref != NULL ) {
 129                         rs->sr_err = LDAP_REFERRAL;
 130                         send_ldap_result( op, rs );
 131
 132                         if (rs->sr_ref != default_referral) ber_bvarray_free( rs->sr_ref );
 133                 } else {
 134                         send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
 135                                 "no global superior knowledge" );
 136                 }
 137                 goto cleanup;
 138         }
 139
 140         /* If we've got a glued backend, check the real backend */
 141         op_be = op->o_bd;
 142         if ( SLAP_GLUE_INSTANCE( op->o_bd )) {
 143                 op->o_bd = select_backend( &op->o_req_ndn, 0 );
 144         }
 145
 146         /* check restrictions */
 147         if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
 148                 send_ldap_result( op, rs );
 149                 goto cleanup;
 150         }
 151
 152         /* check for referrals */
 153         if( backend_check_referrals( op, rs ) != LDAP_SUCCESS ) {
 154                 goto cleanup;
 155         }
 156
 157         /*
 158          * do the delete if 1 && (2 || 3)
 159          * 1) there is a delete function implemented in this backend;
 160          * 2) this backend is master for what it holds;
 161          * 3) it's a replica and the dn supplied is the update_ndn.
 162          */
 163         if ( op->o_bd->be_delete ) {
 164                 /* do the update here */
 165                 int repl_user = be_isupdate( op );
 166                 if ( !SLAP_SINGLE_SHADOW(op->o_bd) || repl_user ) {
 167                         struct berval   org_req_dn = BER_BVNULL;
 168                         struct berval   org_req_ndn = BER_BVNULL;
 169                         struct berval   org_dn = BER_BVNULL;
 170                         struct berval   org_ndn = BER_BVNULL;
 171                         int             org_managedsait;
 172
 173                         op->o_bd = op_be;
 174                         op->o_bd->be_delete( op, rs );
 175
 176                         org_req_dn = op->o_req_dn;
 177                         org_req_ndn = op->o_req_ndn;
 178                         org_dn = op->o_dn;
 179                         org_ndn = op->o_ndn;
 180                         org_managedsait = get_manageDSAit( op );
 181                         op->o_dn = op->o_bd->be_rootdn;
 182                         op->o_ndn = op->o_bd->be_rootndn;
 183                         op->o_managedsait = SLAP_CONTROL_NONCRITICAL;
 184
 185                         while ( rs->sr_err == LDAP_SUCCESS &&
 186                                 op->o_delete_glue_parent )
 187                         {
 188                                 op->o_delete_glue_parent = 0;
 189                                 if ( !be_issuffix( op->o_bd, &op->o_req_ndn )) {
 190                                         slap_callback cb = { NULL, NULL, NULL, NULL };
 191                                         cb.sc_response = slap_null_cb;
 192                                         dnParent( &op->o_req_ndn, &pdn );
 193                                         op->o_req_dn = pdn;
 194                                         op->o_req_ndn = pdn;
 195                                         op->o_callback = &cb;
 196                                         op->o_bd->be_delete( op, rs );
 197                                 } else {
 198                                         break;
 199                                 }
 200                         }
 201
 202                         op->o_managedsait = org_managedsait;
 203                         op->o_dn = org_dn;
 204                         op->o_ndn = org_ndn;
 205                         op->o_req_dn = org_req_dn;
 206                         op->o_req_ndn = org_req_ndn;
 207                         op->o_delete_glue_parent = 0;
 208
 209                 } else {
 210                         BerVarray defref = op->o_bd->be_update_refs
 211                                 ? op->o_bd->be_update_refs : default_referral;
 212
 213                         if ( defref != NULL ) {
 214                                 rs->sr_ref = referral_rewrite( defref,
 215                                         NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 216                                 if (!rs->sr_ref) rs->sr_ref = defref;
 217                                 rs->sr_err = LDAP_REFERRAL;
 218                                 send_ldap_result( op, rs );
 219
 220                                 if (rs->sr_ref != defref) ber_bvarray_free( rs->sr_ref );
 221
 222                         } else {
 223                                 send_ldap_error( op, rs,
 224                                         LDAP_UNWILLING_TO_PERFORM,
 225                                         "shadow context; no update referral" );
 226                         }
 227                 }
 228
 229         } else {
 230                 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
 231                         "operation not supported within namingContext" );
 232         }
 233
 234 cleanup:;
 235         op->o_bd = bd;
 236         return rs->sr_err;
 237 }