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1 /* $OpenLDAP$ */
2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
3  *
4  * Copyright 1999-2005 The OpenLDAP Foundation.
5  * Portions Copyright 2001-2003 Pierangelo Masarati.
6  * Portions Copyright 1999-2003 Howard Chu.
7  * All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted only as authorized by the OpenLDAP
11  * Public License.
12  *
13  * A copy of this license is available in the file LICENSE in the
14  * top-level directory of the distribution or, alternatively, at
15  * <http://www.OpenLDAP.org/license.html>.
16  */
17 /* ACKNOWLEDGEMENTS:
18  * This work was initially developed by the Howard Chu for inclusion
19  * in OpenLDAP Software and subsequently enhanced by Pierangelo
20  * Masarati.
21  */
22
23 #include "portable.h"
24
25 #include <stdio.h>
26
27 #include <ac/errno.h>
28 #include <ac/socket.h>
29 #include <ac/string.h>
30
31 #include "slap.h"
32 #include "../back-ldap/back-ldap.h"
33 #include "back-meta.h"
34
35 int
36 meta_back_conn_destroy(
37         Backend         *be,
38         Connection      *conn )
39 {
40         metainfo_t      *mi = ( metainfo_t * )be->be_private;
41         metaconn_t      *mc,
42                         mc_curr = { 0 };
43
44         Debug( LDAP_DEBUG_TRACE,
45                 "=>meta_back_conn_destroy: fetching conn %ld\n",
46                 conn->c_connid, 0, 0 );
47         
48         mc_curr.mc_conn = conn;
49         
50 retry_lock:;
51         switch ( ldap_pvt_thread_mutex_trylock( &mi->mi_conn_mutex ) ) {
52         case LDAP_PVT_THREAD_EBUSY:
53         default:
54                 ldap_pvt_thread_yield();
55                 goto retry_lock;
56
57         case 0:
58                 break;
59         }
60
61         mc = avl_delete( &mi->mi_conntree, ( caddr_t )&mc_curr,
62                         meta_back_conn_cmp );
63         ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
64
65         if ( mc ) {
66                 int     i;
67
68                 Debug( LDAP_DEBUG_TRACE,
69                         "=>meta_back_conn_destroy: destroying conn %ld\n",
70                         mc->mc_conn->c_connid, 0, 0 );
71                 
72                 assert( mc->mc_refcnt == 0 );
73
74                 /*
75                  * Cleanup rewrite session
76                  */
77                 for ( i = 0; i < mi->mi_ntargets; ++i ) {
78                         rewrite_session_delete( mi->mi_targets[ i ].mt_rwmap.rwm_rw, conn );
79
80                         if ( mc->mc_conns[ i ].msc_ld != NULL ) {
81                                 meta_clear_one_candidate( &mc->mc_conns[ i ] );
82                         }
83                 }
84                 meta_back_conn_free( mc );
85         }
86
87         /* no response to unbind */
88
89         return 0;
90 }
91