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[openldap] / servers / slapd / delete.c
1 /* $OpenLDAP$ */
2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
3  *
4  * Copyright 1998-2010 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 }