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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 1998-2008 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, "do_delete\n", 0, 0, 0 );
45
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, "ber_scanf failed\n", 0, 0, 0 );
54                 send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
55                 return SLAPD_DISCONNECT;
56         }
57
58         if( get_ctrls( op, rs, 1 ) != LDAP_SUCCESS ) {
59                 Debug( LDAP_DEBUG_ANY, "do_delete: get_ctrls failed\n", 0, 0, 0 );
60                 goto cleanup;
61         } 
62
63         rs->sr_err = dnPrettyNormal( NULL, &dn, &op->o_req_dn, &op->o_req_ndn,
64                 op->o_tmpmemctx );
65         if( rs->sr_err != LDAP_SUCCESS ) {
66                 Debug( LDAP_DEBUG_ANY,
67                         "do_delete: invalid dn (%s)\n", dn.bv_val, 0, 0 );
68                 send_ldap_error( op, rs, LDAP_INVALID_DN_SYNTAX, "invalid DN" );
69                 goto cleanup;
70         }
71
72         if( op->o_req_ndn.bv_len == 0 ) {
73                 Debug( LDAP_DEBUG_ANY, "do_delete: root dse!\n", 0, 0, 0 );
74                 /* protocolError would likely be a more appropriate error */
75                 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
76                         "cannot delete the root DSE" );
77                 goto cleanup;
78
79         } else if ( bvmatch( &op->o_req_ndn, &frontendDB->be_schemandn ) ) {
80                 Debug( LDAP_DEBUG_ANY, "do_delete: subschema subentry!\n", 0, 0, 0 );
81                 /* protocolError would likely be a more appropriate error */
82                 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
83                         "cannot delete the root DSE" );
84                 goto cleanup;
85         }
86
87         Statslog( LDAP_DEBUG_STATS, "%s DEL dn=\"%s\"\n",
88                 op->o_log_prefix, op->o_req_dn.bv_val, 0, 0, 0 );
89
90         op->o_bd = frontendDB;
91         rs->sr_err = frontendDB->be_delete( op, rs );
92
93 cleanup:;
94         op->o_tmpfree( op->o_req_dn.bv_val, op->o_tmpmemctx );
95         op->o_tmpfree( op->o_req_ndn.bv_val, op->o_tmpmemctx );
96         return rs->sr_err;
97 }
98
99 int
100 fe_op_delete( Operation *op, SlapReply *rs )
101 {
102         struct berval   pdn = BER_BVNULL;
103         int             manageDSAit;
104         BackendDB *op_be, *bd = op->o_bd;
105         
106         manageDSAit = get_manageDSAit( op );
107
108         /*
109          * We could be serving multiple database backends.  Select the
110          * appropriate one, or send a referral to our "referral server"
111          * if we don't hold it.
112          */
113         op->o_bd = select_backend( &op->o_req_ndn, manageDSAit, 1 );
114         if ( op->o_bd == NULL ) {
115                 op->o_bd = bd;
116                 rs->sr_ref = referral_rewrite( default_referral,
117                         NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
118
119                 if (!rs->sr_ref) rs->sr_ref = default_referral;
120                 if ( rs->sr_ref != NULL ) {
121                         rs->sr_err = LDAP_REFERRAL;
122                         send_ldap_result( op, rs );
123
124                         if (rs->sr_ref != default_referral) ber_bvarray_free( rs->sr_ref );
125                 } else {
126                         send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
127                                 "no global superior knowledge" );
128                 }
129                 goto cleanup;
130         }
131
132         /* If we've got a glued backend, check the real backend */
133         op_be = op->o_bd;
134         if ( SLAP_GLUE_INSTANCE( op->o_bd )) {
135                 op->o_bd = select_backend( &op->o_req_ndn, manageDSAit, 0 );
136         }
137
138         /* check restrictions */
139         if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
140                 send_ldap_result( op, rs );
141                 goto cleanup;
142         }
143
144         /* check for referrals */
145         if( backend_check_referrals( op, rs ) != LDAP_SUCCESS ) {
146                 goto cleanup;
147         }
148
149         /*
150          * do the delete if 1 && (2 || 3)
151          * 1) there is a delete function implemented in this backend;
152          * 2) this backend is master for what it holds;
153          * 3) it's a replica and the dn supplied is the update_ndn.
154          */
155         if ( op->o_bd->be_delete ) {
156                 /* do the update here */
157                 int repl_user = be_isupdate( op );
158 #ifndef SLAPD_MULTIMASTER
159                 if ( !SLAP_SHADOW(op->o_bd) || repl_user )
160 #endif
161                 {
162                         struct berval   org_req_dn = BER_BVNULL;
163                         struct berval   org_req_ndn = BER_BVNULL;
164                         struct berval   org_dn = BER_BVNULL;
165                         struct berval   org_ndn = BER_BVNULL;
166                         int             org_managedsait;
167                         slap_callback   cb = { NULL, slap_replog_cb, NULL, NULL };
168
169                         op->o_bd = op_be;
170
171 #ifdef SLAPD_MULTIMASTER
172                         if ( !op->o_bd->be_update_ndn.bv_len || !repl_user )
173 #endif
174                         {
175                                 cb.sc_next = op->o_callback;
176                                 op->o_callback = &cb;
177                         }
178
179                         op->o_bd->be_delete( op, rs );
180
181                         org_req_dn = op->o_req_dn;
182                         org_req_ndn = op->o_req_ndn;
183                         org_dn = op->o_dn;
184                         org_ndn = op->o_ndn;
185                         org_managedsait = get_manageDSAit( op );
186                         op->o_dn = op->o_bd->be_rootdn;
187                         op->o_ndn = op->o_bd->be_rootndn;
188                         op->o_managedsait = SLAP_CONTROL_NONCRITICAL;
189
190                         while ( rs->sr_err == LDAP_SUCCESS &&
191                                 op->o_delete_glue_parent )
192                         {
193                                 op->o_delete_glue_parent = 0;
194                                 if ( !be_issuffix( op->o_bd, &op->o_req_ndn )) {
195                                         slap_callback cb = { NULL, NULL, NULL, NULL };
196                                         cb.sc_response = slap_null_cb;
197                                         dnParent( &op->o_req_ndn, &pdn );
198                                         op->o_req_dn = pdn;
199                                         op->o_req_ndn = pdn;
200                                         op->o_callback = &cb;
201                                         op->o_bd->be_delete( op, rs );
202                                 } else {
203                                         break;
204                                 }
205                         }
206
207                         op->o_managedsait = org_managedsait;
208                         op->o_dn = org_dn;
209                         op->o_ndn = org_ndn;
210                         op->o_req_dn = org_req_dn;
211                         op->o_req_ndn = org_req_ndn;
212                         op->o_delete_glue_parent = 0;
213
214 #ifndef SLAPD_MULTIMASTER
215                 } else {
216                         BerVarray defref = op->o_bd->be_update_refs
217                                 ? op->o_bd->be_update_refs : default_referral;
218
219                         if ( defref != NULL ) {
220                                 rs->sr_ref = referral_rewrite( defref,
221                                         NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
222                                 if (!rs->sr_ref) rs->sr_ref = defref;
223                                 rs->sr_err = LDAP_REFERRAL;
224                                 send_ldap_result( op, rs );
225
226                                 if (rs->sr_ref != defref) ber_bvarray_free( rs->sr_ref );
227
228                         } else {
229                                 send_ldap_error( op, rs,
230                                         LDAP_UNWILLING_TO_PERFORM,
231                                         "shadow context; no update referral" );
232                         }
233 #endif
234                 }
235
236         } else {
237                 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
238                         "operation not supported within namingContext" );
239         }
240
241 cleanup:;
242         op->o_bd = bd;
243         return rs->sr_err;
244 }