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217 lines
5.0 KiB
C
217 lines
5.0 KiB
C
/* ctxcsn.c -- Context CSN Management Routines */
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/* $OpenLDAP$ */
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/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
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*
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* Copyright 2003-2019 The OpenLDAP Foundation.
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* Portions Copyright 2003 IBM Corporation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted only as authorized by the OpenLDAP
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* Public License.
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*
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* A copy of this license is available in the file LICENSE in the
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* top-level directory of the distribution or, alternatively, at
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* <http://www.OpenLDAP.org/license.html>.
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*/
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#include "portable.h"
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#include <stdio.h>
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#include <ac/string.h>
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#include <ac/socket.h>
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#include "lutil.h"
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#include "slap.h"
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#include "lutil_ldap.h"
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const struct berval slap_ldapsync_bv = BER_BVC("ldapsync");
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const struct berval slap_ldapsync_cn_bv = BER_BVC("cn=ldapsync");
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int slap_serverID;
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/* maxcsn->bv_val must point to a char buf[LDAP_PVT_CSNSTR_BUFSIZE] */
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void
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slap_get_commit_csn(
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Operation *op,
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struct berval *maxcsn,
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int *foundit
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)
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{
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struct slap_csn_entry *csne, *committed_csne = NULL;
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BackendDB *be = op->o_bd->bd_self;
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int sid = -1;
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if ( maxcsn ) {
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assert( maxcsn->bv_val != NULL );
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assert( maxcsn->bv_len >= LDAP_PVT_CSNSTR_BUFSIZE );
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}
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if ( foundit ) {
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*foundit = 0;
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}
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if ( !BER_BVISEMPTY( &op->o_csn )) {
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sid = slap_parse_csn_sid( &op->o_csn );
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}
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ldap_pvt_thread_mutex_lock( &be->be_pcl_mutex );
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LDAP_TAILQ_FOREACH( csne, be->be_pending_csn_list, ce_csn_link ) {
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if ( csne->ce_op == op ) {
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csne->ce_state = SLAP_CSN_COMMIT;
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if ( foundit ) *foundit = 1;
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break;
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}
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}
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LDAP_TAILQ_FOREACH( csne, be->be_pending_csn_list, ce_csn_link ) {
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if ( sid != -1 && sid == csne->ce_sid ) {
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if ( csne->ce_state == SLAP_CSN_COMMIT ) committed_csne = csne;
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if ( csne->ce_state == SLAP_CSN_PENDING ) break;
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}
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}
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if ( maxcsn ) {
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if ( committed_csne ) {
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if ( committed_csne->ce_csn.bv_len < maxcsn->bv_len )
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maxcsn->bv_len = committed_csne->ce_csn.bv_len;
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AC_MEMCPY( maxcsn->bv_val, committed_csne->ce_csn.bv_val,
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maxcsn->bv_len+1 );
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} else {
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maxcsn->bv_len = 0;
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maxcsn->bv_val[0] = 0;
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}
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}
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ldap_pvt_thread_mutex_unlock( &be->be_pcl_mutex );
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}
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void
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slap_rewind_commit_csn( Operation *op )
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{
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struct slap_csn_entry *csne;
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BackendDB *be = op->o_bd->bd_self;
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ldap_pvt_thread_mutex_lock( &be->be_pcl_mutex );
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LDAP_TAILQ_FOREACH( csne, be->be_pending_csn_list, ce_csn_link ) {
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if ( csne->ce_op == op ) {
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csne->ce_state = SLAP_CSN_PENDING;
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break;
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}
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}
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ldap_pvt_thread_mutex_unlock( &be->be_pcl_mutex );
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}
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void
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slap_graduate_commit_csn( Operation *op )
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{
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struct slap_csn_entry *csne;
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BackendDB *be;
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if ( op == NULL ) return;
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if ( op->o_bd == NULL ) return;
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be = op->o_bd->bd_self;
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ldap_pvt_thread_mutex_lock( &be->be_pcl_mutex );
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LDAP_TAILQ_FOREACH( csne, be->be_pending_csn_list, ce_csn_link ) {
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if ( csne->ce_op == op ) {
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LDAP_TAILQ_REMOVE( be->be_pending_csn_list,
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csne, ce_csn_link );
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Debug( LDAP_DEBUG_SYNC, "slap_graduate_commit_csn: removing %p %s\n",
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csne, csne->ce_csn.bv_val );
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if ( op->o_csn.bv_val == csne->ce_csn.bv_val ) {
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BER_BVZERO( &op->o_csn );
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}
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ch_free( csne->ce_csn.bv_val );
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ch_free( csne );
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break;
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}
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}
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ldap_pvt_thread_mutex_unlock( &be->be_pcl_mutex );
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return;
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}
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static struct berval ocbva[] = {
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BER_BVC("top"),
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BER_BVC("subentry"),
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BER_BVC("syncProviderSubentry"),
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BER_BVNULL
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};
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Entry *
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slap_create_context_csn_entry(
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Backend *be,
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struct berval *context_csn )
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{
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Entry* e;
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struct berval bv;
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e = entry_alloc();
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attr_merge( e, slap_schema.si_ad_objectClass,
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ocbva, NULL );
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attr_merge_one( e, slap_schema.si_ad_structuralObjectClass,
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&ocbva[1], NULL );
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attr_merge_one( e, slap_schema.si_ad_cn,
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(struct berval *)&slap_ldapsync_bv, NULL );
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if ( context_csn ) {
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attr_merge_one( e, slap_schema.si_ad_contextCSN,
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context_csn, NULL );
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}
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BER_BVSTR( &bv, "{}" );
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attr_merge_one( e, slap_schema.si_ad_subtreeSpecification, &bv, NULL );
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build_new_dn( &e->e_name, &be->be_nsuffix[0],
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(struct berval *)&slap_ldapsync_cn_bv, NULL );
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ber_dupbv( &e->e_nname, &e->e_name );
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return e;
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}
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void
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slap_queue_csn(
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Operation *op,
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struct berval *csn )
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{
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struct slap_csn_entry *pending;
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BackendDB *be = op->o_bd->bd_self;
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pending = (struct slap_csn_entry *) ch_calloc( 1,
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sizeof( struct slap_csn_entry ));
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Debug( LDAP_DEBUG_SYNC, "slap_queue_csn: queueing %p %s\n", pending, csn->bv_val );
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ber_dupbv( &pending->ce_csn, csn );
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ber_bvreplace_x( &op->o_csn, &pending->ce_csn, op->o_tmpmemctx );
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pending->ce_sid = slap_parse_csn_sid( csn );
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pending->ce_op = op;
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pending->ce_state = SLAP_CSN_PENDING;
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ldap_pvt_thread_mutex_lock( &be->be_pcl_mutex );
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LDAP_TAILQ_INSERT_TAIL( be->be_pending_csn_list,
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pending, ce_csn_link );
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ldap_pvt_thread_mutex_unlock( &be->be_pcl_mutex );
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}
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int
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slap_get_csn(
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Operation *op,
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struct berval *csn,
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int manage_ctxcsn )
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{
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if ( csn == NULL ) return LDAP_OTHER;
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csn->bv_len = ldap_pvt_csnstr( csn->bv_val, csn->bv_len, slap_serverID, 0 );
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if ( manage_ctxcsn )
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slap_queue_csn( op, csn );
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return LDAP_SUCCESS;
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}
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