X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=servers%2Fslapd%2Fctxcsn.c;h=cb828999ccfea8d971949cf05858ae5358cfcf7f;hb=5b98495d5c45ae43a0774f058fe073e145162050;hp=71c7188bd3c9f2fd79a5863914ac57df545617b5;hpb=279760a4674c26b8d6b6a843c2fd20e630e3c7d6;p=openldap

diff --git a/servers/slapd/ctxcsn.c b/servers/slapd/ctxcsn.c
index 71c7188bd3..cb828999cc 100644
--- a/servers/slapd/ctxcsn.c
+++ b/servers/slapd/ctxcsn.c
@@ -1,23 +1,18 @@
+/* ctxcsn.c -- Context CSN Management Routines */
 /* $OpenLDAP$ */
-/*
- * Context CSN Management Routines
- */
-/* Copyright (c) 2003 by International Business Machines, Inc.
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2003-2009 The OpenLDAP Foundation.
+ * Portions Copyright 2003 IBM Corporation.
+ * All rights reserved.
  *
- * International Business Machines, Inc. (hereinafter called IBM) grants
- * permission under its copyrights to use, copy, modify, and distribute this
- * Software with or without fee, provided that the above copyright notice and
- * all paragraphs of this notice appear in all copies, and that the name of IBM
- * not be used in connection with the marketing of any product incorporating
- * the Software or modifications thereof, without specific, written prior
- * permission.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
  *
- * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES,
- * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
- * PARTICULAR PURPOSE.  IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL,
- * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING
- * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN
- * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES.
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
  */
 
 #include "portable.h"
@@ -27,180 +22,158 @@
 #include <ac/string.h>
 #include <ac/socket.h>
 
-#include "ldap_pvt.h"
 #include "lutil.h"
 #include "slap.h"
 #include "lutil_ldap.h"
 
-const struct berval slap_ldapsync_bv = BER_BVC("ldapsync");
-const struct berval slap_ldapsync_cn_bv = BER_BVC("cn=ldapsync");
+int slap_serverID;
 
+/* maxcsn->bv_val must point to a char buf[LDAP_LUTIL_CSNSTR_BUFSIZE] */
 void
-slap_get_commit_csn( Operation *op, struct berval *csn )
+slap_get_commit_csn(
+	Operation *op,
+	struct berval *maxcsn,
+	int *foundit
+)
 {
-	struct slap_csn_entry *csne = NULL, *committed_csne = NULL;
-	int i = 0;
-
-	csn->bv_val = NULL;
-	csn->bv_len = 0;
+	struct slap_csn_entry *csne, *committed_csne = NULL;
+	BackendDB *be = op->o_bd->bd_self;
+	int sid = -1;
 
-	ldap_pvt_thread_mutex_lock( &op->o_bd->be_pcl_mutex );
-
-	LDAP_TAILQ_FOREACH( csne, &op->o_bd->be_pending_csn_list, csn_link ) {
-		if ( csne->opid == op->o_opid && csne->connid == op->o_connid )
-			break;
+	if ( maxcsn ) {
+		assert( maxcsn->bv_val != NULL );
+		assert( maxcsn->bv_len >= LDAP_LUTIL_CSNSTR_BUFSIZE );
 	}
+	if ( foundit ) {
+		*foundit = 0;
+	}
+
+	ldap_pvt_thread_mutex_lock( &be->be_pcl_mutex );
 
-	if ( csne ) {
-		csne->state = SLAP_CSN_COMMIT;
+	if ( !BER_BVISEMPTY( &op->o_csn )) {
+		sid = slap_parse_csn_sid( &op->o_csn );
 	}
 
-	LDAP_TAILQ_FOREACH( csne, &op->o_bd->be_pending_csn_list, csn_link ) {
-		if ( csne->state == SLAP_CSN_COMMIT )
-			committed_csne = csne;
-		if ( csne->state == SLAP_CSN_PENDING )
+	LDAP_TAILQ_FOREACH( csne, be->be_pending_csn_list, ce_csn_link ) {
+		if ( csne->ce_opid == op->o_opid && csne->ce_connid == op->o_connid ) {
+			csne->ce_state = SLAP_CSN_COMMIT;
+			if ( foundit ) *foundit = 1;
 			break;
+		}
 	}
 
-	ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
+	LDAP_TAILQ_FOREACH( csne, be->be_pending_csn_list, ce_csn_link ) {
+		if ( sid != -1 && sid == csne->ce_sid ) {
+			if ( csne->ce_state == SLAP_CSN_COMMIT ) committed_csne = csne;
+			if ( csne->ce_state == SLAP_CSN_PENDING ) break;
+		}
+	}
 
-	if ( committed_csne ) {
-		ber_dupbv( csn, committed_csne->csn );
+	if ( maxcsn ) {
+		if ( committed_csne ) {
+			if ( committed_csne->ce_csn.bv_len < maxcsn->bv_len )
+				maxcsn->bv_len = committed_csne->ce_csn.bv_len;
+			AC_MEMCPY( maxcsn->bv_val, committed_csne->ce_csn.bv_val,
+				maxcsn->bv_len+1 );
+		} else {
+			maxcsn->bv_len = 0;
+			maxcsn->bv_val[0] = 0;
+		}
 	}
+	ldap_pvt_thread_mutex_unlock( &be->be_pcl_mutex );
 }
 
 void
 slap_rewind_commit_csn( Operation *op )
 {
-	struct slap_csn_entry *csne = NULL;
+	struct slap_csn_entry *csne;
+	BackendDB *be = op->o_bd->bd_self;
 
-	ldap_pvt_thread_mutex_lock( &op->o_bd->be_pcl_mutex );
+	ldap_pvt_thread_mutex_lock( &be->be_pcl_mutex );
 
-	LDAP_TAILQ_FOREACH( csne, &op->o_bd->be_pending_csn_list, csn_link ) {
-		if ( csne->opid == op->o_opid && csne->connid == op->o_connid )
+	LDAP_TAILQ_FOREACH( csne, be->be_pending_csn_list, ce_csn_link ) {
+		if ( csne->ce_opid == op->o_opid && csne->ce_connid == op->o_connid ) {
+			csne->ce_state = SLAP_CSN_PENDING;
 			break;
+		}
 	}
 
-	if ( csne ) {
-		csne->state = SLAP_CSN_PENDING;
-	}
-	
-	ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
+	ldap_pvt_thread_mutex_unlock( &be->be_pcl_mutex );
 }
 
 void
 slap_graduate_commit_csn( Operation *op )
 {
-	struct slap_csn_entry *csne = NULL;
-
-	if ( op == NULL )
-		return;
-
-	if ( op->o_bd == NULL )
-		return;
-
-	ldap_pvt_thread_mutex_lock( &op->o_bd->be_pcl_mutex );
-
-	LDAP_TAILQ_FOREACH( csne, &op->o_bd->be_pending_csn_list, csn_link ) {
-		if ( csne->opid == op->o_opid && csne->connid == op->o_connid )
+	struct slap_csn_entry *csne;
+	BackendDB *be;
+
+	if ( op == NULL ) return;
+	if ( op->o_bd == NULL ) return;
+	be = op->o_bd->bd_self;
+
+	ldap_pvt_thread_mutex_lock( &be->be_pcl_mutex );
+
+	LDAP_TAILQ_FOREACH( csne, be->be_pending_csn_list, ce_csn_link ) {
+		if ( csne->ce_opid == op->o_opid && csne->ce_connid == op->o_connid ) {
+			LDAP_TAILQ_REMOVE( be->be_pending_csn_list,
+				csne, ce_csn_link );
+			Debug( LDAP_DEBUG_SYNC, "slap_graduate_commit_csn: removing %p %s\n",
+				csne->ce_csn.bv_val, csne->ce_csn.bv_val, 0 );
+			if ( op->o_csn.bv_val == csne->ce_csn.bv_val ) {
+				BER_BVZERO( &op->o_csn );
+			}
+			ch_free( csne->ce_csn.bv_val );
+			ch_free( csne );
 			break;
+		}
 	}
 
-	if ( csne ) {
-		LDAP_TAILQ_REMOVE( &op->o_bd->be_pending_csn_list, csne, csn_link );
-		ch_free( csne->csn->bv_val );
-		ch_free( csne->csn );
-		ch_free( csne );
-	}
-
-	ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
+	ldap_pvt_thread_mutex_unlock( &be->be_pcl_mutex );
 
 	return;
 }
 
-static struct berval ocbva[] = {
-	BER_BVC("top"),
-	BER_BVC("subentry"),
-	BER_BVC("syncProviderSubentry"),
-	{0,NULL}
-};
-
-Entry *
-slap_create_context_csn_entry(
-	Backend *be,
-	struct berval *context_csn
-)
+void
+slap_queue_csn(
+	Operation *op,
+	struct berval *csn )
 {
-	Entry* e;
-	int rc;
-
-	struct berval bv;
-
-	e = ( Entry * ) ch_calloc( 1, sizeof( Entry ));
-
-	attr_merge( e, slap_schema.si_ad_objectClass, ocbva, NULL );
-
-	attr_merge_one( e, slap_schema.si_ad_structuralObjectClass, &ocbva[1], NULL );
-
-	attr_merge_one( e, slap_schema.si_ad_cn, (struct berval *)&slap_ldapsync_bv, NULL );
-
-	if ( context_csn ) {
-		attr_merge_one( e, slap_schema.si_ad_contextCSN,
-			context_csn, NULL );
-	}
+	struct slap_csn_entry *pending;
+	BackendDB *be = op->o_bd->bd_self;
 
-	bv.bv_val = "{}";
-	bv.bv_len = sizeof("{}")-1;
-	attr_merge_one( e, slap_schema.si_ad_subtreeSpecification, &bv, NULL );
+	pending = (struct slap_csn_entry *) ch_calloc( 1,
+			sizeof( struct slap_csn_entry ));
 
-	build_new_dn( &e->e_name, &be->be_nsuffix[0], (struct berval *)&slap_ldapsync_cn_bv, NULL );
-	ber_dupbv( &e->e_nname, &e->e_name );
+	Debug( LDAP_DEBUG_SYNC, "slap_queue_csn: queing %p %s\n", csn->bv_val, csn->bv_val, 0 );
 
-	return e;
-}
+	ldap_pvt_thread_mutex_lock( &be->be_pcl_mutex );
 
-static int
-slap_contextcsn_callback(
-	Operation* op,
-	SlapReply* rs
-)
-{
-	if ( rs->sr_type != REP_SEARCH ) {
-		*((int*)op->o_callback->sc_private) = 0;
-	} else {
-		*((int*)op->o_callback->sc_private) = 1;
-	}
-	return LDAP_SUCCESS;
+	ber_dupbv( &pending->ce_csn, csn );
+	ber_bvreplace_x( &op->o_csn, &pending->ce_csn, op->o_tmpmemctx );
+	pending->ce_sid = slap_parse_csn_sid( csn );
+	pending->ce_connid = op->o_connid;
+	pending->ce_opid = op->o_opid;
+	pending->ce_state = SLAP_CSN_PENDING;
+	LDAP_TAILQ_INSERT_TAIL( be->be_pending_csn_list,
+		pending, ce_csn_link );
+	ldap_pvt_thread_mutex_unlock( &be->be_pcl_mutex );
 }
 
 int
 slap_get_csn(
 	Operation *op,
-	char *csnbuf,
-	int	len,
 	struct berval *csn,
-	int manage_ctxcsn
-)
+	int manage_ctxcsn )
 {
-	struct	slap_csn_entry *pending;
-
-	if ( csn == NULL )
-		return LDAP_OTHER;
-
-	csn->bv_len = lutil_csnstr( csnbuf, len, 0, 0 );
-	csn->bv_val = csnbuf;
-
-	if ( manage_ctxcsn ) {
-		pending = (struct slap_csn_entry *) ch_calloc( 1, sizeof( struct slap_csn_entry ));
-		ldap_pvt_thread_mutex_lock( &op->o_bd->be_pcl_mutex );
-		ber_dupbv( &op->o_sync_csn, csn );
-		pending->csn = ber_dupbv( NULL, csn );
-		pending->connid = op->o_connid;
-		pending->opid = op->o_opid;
-		pending->state = SLAP_CSN_PENDING;
-		LDAP_TAILQ_INSERT_TAIL( &op->o_bd->be_pending_csn_list, pending, csn_link );
-		ldap_pvt_thread_mutex_unlock( &op->o_bd->be_pcl_mutex );
-	}
+	if ( csn == NULL ) return LDAP_OTHER;
+
+	/* gmtime doesn't always need a mutex, but lutil_csnstr does */
+	ldap_pvt_thread_mutex_lock( &gmtime_mutex );
+	csn->bv_len = lutil_csnstr( csn->bv_val, csn->bv_len, slap_serverID, 0 );
+	if ( manage_ctxcsn )
+		slap_queue_csn( op, csn );
+
+	ldap_pvt_thread_mutex_unlock( &gmtime_mutex );
 
 	return LDAP_SUCCESS;
 }