1 /* ctxcsn.c -- Context CSN Management Routines */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
5 * Copyright 2003-2008 The OpenLDAP Foundation.
6 * Portions Copyright 2003 IBM Corporation.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted only as authorized by the OpenLDAP
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>.
22 #include <ac/string.h>
23 #include <ac/socket.h>
27 #include "lutil_ldap.h"
29 const struct berval slap_ldapsync_bv = BER_BVC("ldapsync");
30 const struct berval slap_ldapsync_cn_bv = BER_BVC("cn=ldapsync");
39 struct slap_csn_entry *csne, *committed_csne = NULL;
40 BackendDB *be = op->o_bd->bd_self;
46 ldap_pvt_thread_mutex_lock( be->be_pcl_mutexp );
48 LDAP_TAILQ_FOREACH( csne, be->be_pending_csn_list, ce_csn_link ) {
49 if ( csne->ce_opid == op->o_opid && csne->ce_connid == op->o_connid ) {
50 csne->ce_state = SLAP_CSN_COMMIT;
55 LDAP_TAILQ_FOREACH( csne, be->be_pending_csn_list, ce_csn_link ) {
56 if ( csne->ce_state == SLAP_CSN_COMMIT ) committed_csne = csne;
57 if ( csne->ce_state == SLAP_CSN_PENDING ) break;
60 if ( committed_csne && maxcsn ) *maxcsn = committed_csne->ce_csn;
61 ldap_pvt_thread_mutex_unlock( be->be_pcl_mutexp );
65 slap_rewind_commit_csn( Operation *op )
67 struct slap_csn_entry *csne;
68 BackendDB *be = op->o_bd->bd_self;
70 ldap_pvt_thread_mutex_lock( be->be_pcl_mutexp );
72 LDAP_TAILQ_FOREACH( csne, be->be_pending_csn_list, ce_csn_link ) {
73 if ( csne->ce_opid == op->o_opid && csne->ce_connid == op->o_connid ) {
74 csne->ce_state = SLAP_CSN_PENDING;
79 ldap_pvt_thread_mutex_unlock( be->be_pcl_mutexp );
83 slap_graduate_commit_csn( Operation *op )
85 struct slap_csn_entry *csne;
88 if ( op == NULL ) return;
89 if ( op->o_bd == NULL ) return;
90 be = op->o_bd->bd_self;
93 /* it is NULL when we get here from the frontendDB;
94 * alternate fix: initialize frontendDB like all other backends */
95 assert( op->o_bd->be_pcl_mutexp != NULL );
98 if ( be->be_pcl_mutexp == NULL ) return;
100 ldap_pvt_thread_mutex_lock( be->be_pcl_mutexp );
102 LDAP_TAILQ_FOREACH( csne, be->be_pending_csn_list, ce_csn_link ) {
103 if ( csne->ce_opid == op->o_opid && csne->ce_connid == op->o_connid ) {
104 LDAP_TAILQ_REMOVE( be->be_pending_csn_list,
106 Debug( LDAP_DEBUG_SYNC, "slap_graduate_commit_csn: removing %p %s\n",
107 csne->ce_csn.bv_val, csne->ce_csn.bv_val, 0 );
108 if ( op->o_csn.bv_val == csne->ce_csn.bv_val ) {
109 BER_BVZERO( &op->o_csn );
111 ch_free( csne->ce_csn.bv_val );
117 ldap_pvt_thread_mutex_unlock( be->be_pcl_mutexp );
122 static struct berval ocbva[] = {
125 BER_BVC("syncProviderSubentry"),
130 slap_create_context_csn_entry(
132 struct berval *context_csn )
140 attr_merge( e, slap_schema.si_ad_objectClass,
142 attr_merge_one( e, slap_schema.si_ad_structuralObjectClass,
144 attr_merge_one( e, slap_schema.si_ad_cn,
145 (struct berval *)&slap_ldapsync_bv, NULL );
148 attr_merge_one( e, slap_schema.si_ad_contextCSN,
152 BER_BVSTR( &bv, "{}" );
153 attr_merge_one( e, slap_schema.si_ad_subtreeSpecification, &bv, NULL );
155 build_new_dn( &e->e_name, &be->be_nsuffix[0],
156 (struct berval *)&slap_ldapsync_cn_bv, NULL );
157 ber_dupbv( &e->e_nname, &e->e_name );
167 struct slap_csn_entry *pending;
168 BackendDB *be = op->o_bd->bd_self;
170 pending = (struct slap_csn_entry *) ch_calloc( 1,
171 sizeof( struct slap_csn_entry ));
173 Debug( LDAP_DEBUG_SYNC, "slap_queue_csn: queing %p %s\n", csn->bv_val, csn->bv_val, 0 );
175 ldap_pvt_thread_mutex_lock( be->be_pcl_mutexp );
177 ber_dupbv( &pending->ce_csn, csn );
178 ber_bvreplace_x( &op->o_csn, &pending->ce_csn, op->o_tmpmemctx );
179 pending->ce_connid = op->o_connid;
180 pending->ce_opid = op->o_opid;
181 pending->ce_state = SLAP_CSN_PENDING;
182 LDAP_TAILQ_INSERT_TAIL( be->be_pending_csn_list,
183 pending, ce_csn_link );
184 ldap_pvt_thread_mutex_unlock( be->be_pcl_mutexp );
193 if ( csn == NULL ) return LDAP_OTHER;
195 /* gmtime doesn't always need a mutex, but lutil_csnstr does */
196 ldap_pvt_thread_mutex_lock( &gmtime_mutex );
197 csn->bv_len = lutil_csnstr( csn->bv_val, csn->bv_len, slap_serverID, 0 );
198 ldap_pvt_thread_mutex_unlock( &gmtime_mutex );
201 slap_queue_csn( op, csn );