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

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1998-2017 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         if ( rs->sr_err == SLAPD_ASYNCOP ) {
  97                 /* skip cleanup */
  98                 return rs->sr_err;
  99         }
 100
 101 #ifdef LDAP_X_TXN
 102         if( rs->sr_err == LDAP_X_TXN_SPECIFY_OKAY ) {
 103                 /* skip cleanup */
 104                 return rs->sr_err;
 105         }
 106 #endif
 107
 108 cleanup:;
 109         op->o_tmpfree( op->o_req_dn.bv_val, op->o_tmpmemctx );
 110         op->o_tmpfree( op->o_req_ndn.bv_val, op->o_tmpmemctx );
 111         return rs->sr_err;
 112 }
 113
 114 int
 115 fe_op_delete( Operation *op, SlapReply *rs )
 116 {
 117         struct berval   pdn = BER_BVNULL;
 118         BackendDB       *op_be, *bd = op->o_bd;
 119
 120         /*
 121          * We could be serving multiple database backends.  Select the
 122          * appropriate one, or send a referral to our "referral server"
 123          * if we don't hold it.
 124          */
 125         op->o_bd = select_backend( &op->o_req_ndn, 1 );
 126         if ( op->o_bd == NULL ) {
 127                 op->o_bd = bd;
 128                 rs->sr_ref = referral_rewrite( default_referral,
 129                         NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 130
 131                 if (!rs->sr_ref) rs->sr_ref = default_referral;
 132                 if ( rs->sr_ref != NULL ) {
 133                         rs->sr_err = LDAP_REFERRAL;
 134                         send_ldap_result( op, rs );
 135
 136                         if (rs->sr_ref != default_referral) ber_bvarray_free( rs->sr_ref );
 137                 } else {
 138                         send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
 139                                 "no global superior knowledge" );
 140                 }
 141                 goto cleanup;
 142         }
 143
 144         /* If we've got a glued backend, check the real backend */
 145         op_be = op->o_bd;
 146         if ( SLAP_GLUE_INSTANCE( op->o_bd )) {
 147                 op->o_bd = select_backend( &op->o_req_ndn, 0 );
 148         }
 149
 150         /* check restrictions */
 151         if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
 152                 send_ldap_result( op, rs );
 153                 goto cleanup;
 154         }
 155
 156         /* check for referrals */
 157         if( backend_check_referrals( op, rs ) != LDAP_SUCCESS ) {
 158                 goto cleanup;
 159         }
 160
 161         /*
 162          * do the delete if 1 && (2 || 3)
 163          * 1) there is a delete function implemented in this backend;
 164          * 2) this backend is master for what it holds;
 165          * 3) it's a replica and the dn supplied is the update_ndn.
 166          */
 167         if ( op->o_bd->be_delete ) {
 168                 /* do the update here */
 169                 int repl_user = be_isupdate( op );
 170                 if ( !SLAP_SINGLE_SHADOW(op->o_bd) || repl_user ) {
 171                         struct berval   org_req_dn = BER_BVNULL;
 172                         struct berval   org_req_ndn = BER_BVNULL;
 173                         struct berval   org_dn = BER_BVNULL;
 174                         struct berval   org_ndn = BER_BVNULL;
 175                         int             org_managedsait;
 176
 177                         op->o_bd = op_be;
 178                         op->o_bd->be_delete( op, rs );
 179
 180                         org_req_dn = op->o_req_dn;
 181                         org_req_ndn = op->o_req_ndn;
 182                         org_dn = op->o_dn;
 183                         org_ndn = op->o_ndn;
 184                         org_managedsait = get_manageDSAit( op );
 185                         op->o_dn = op->o_bd->be_rootdn;
 186                         op->o_ndn = op->o_bd->be_rootndn;
 187                         op->o_managedsait = SLAP_CONTROL_NONCRITICAL;
 188
 189                         while ( rs->sr_err == LDAP_SUCCESS &&
 190                                 op->o_delete_glue_parent )
 191                         {
 192                                 op->o_delete_glue_parent = 0;
 193                                 if ( !be_issuffix( op->o_bd, &op->o_req_ndn )) {
 194                                         slap_callback cb = { NULL, NULL, NULL, NULL };
 195                                         cb.sc_response = slap_null_cb;
 196                                         dnParent( &op->o_req_ndn, &pdn );
 197                                         op->o_req_dn = pdn;
 198                                         op->o_req_ndn = pdn;
 199                                         op->o_callback = &cb;
 200                                         op->o_bd->be_delete( op, rs );
 201                                 } else {
 202                                         break;
 203                                 }
 204                         }
 205
 206                         op->o_managedsait = org_managedsait;
 207                         op->o_dn = org_dn;
 208                         op->o_ndn = org_ndn;
 209                         op->o_req_dn = org_req_dn;
 210                         op->o_req_ndn = org_req_ndn;
 211                         op->o_delete_glue_parent = 0;
 212
 213                 } else {
 214                         BerVarray defref = op->o_bd->be_update_refs
 215                                 ? op->o_bd->be_update_refs : default_referral;
 216
 217                         if ( defref != NULL ) {
 218                                 rs->sr_ref = referral_rewrite( defref,
 219                                         NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 220                                 if (!rs->sr_ref) rs->sr_ref = defref;
 221                                 rs->sr_err = LDAP_REFERRAL;
 222                                 send_ldap_result( op, rs );
 223
 224                                 if (rs->sr_ref != defref) ber_bvarray_free( rs->sr_ref );
 225
 226                         } else {
 227                                 send_ldap_error( op, rs,
 228                                         LDAP_UNWILLING_TO_PERFORM,
 229                                         "shadow context; no update referral" );
 230                         }
 231                 }
 232
 233         } else {
 234                 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
 235                         "operation not supported within namingContext" );
 236         }
 237
 238 cleanup:;
 239         op->o_bd = bd;
 240         return rs->sr_err;
 241 }