X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=servers%2Fslapd%2Fctxcsn.c;h=873721600fcf8963f559d9fd8a95a054a0594806;hb=7c183775d0a96448aef12ce4e0cbb492615e919c;hp=b67fc7dff9061310325282065d5a9990d53e49da;hpb=77ba70be13d5aeea912caf55d343a70acf0f5f59;p=openldap

diff --git a/servers/slapd/ctxcsn.c b/servers/slapd/ctxcsn.c
index b67fc7dff9..873721600f 100644
--- a/servers/slapd/ctxcsn.c
+++ b/servers/slapd/ctxcsn.c
@@ -2,7 +2,7 @@
 /* $OpenLDAP$ */
 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
  *
- * Copyright 2003-2004 The OpenLDAP Foundation.
+ * Copyright 2003-2009 The OpenLDAP Foundation.
  * Portions Copyright 2003 IBM Corporation.
  * All rights reserved.
  *
@@ -22,80 +22,108 @@
 #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, *committed_csne = NULL;
-	int i = 0;
+	BackendDB *be = op->o_bd->bd_self;
 
-	csn->bv_val = NULL;
-	csn->bv_len = 0;
+	if ( maxcsn ) {
+		assert( maxcsn->bv_val != NULL );
+		assert( maxcsn->bv_len >= LDAP_LUTIL_CSNSTR_BUFSIZE );
+	}
+	if ( foundit ) {
+		*foundit = 0;
+	}
 
-	ldap_pvt_thread_mutex_lock( op->o_bd->be_pcl_mutexp );
+	ldap_pvt_thread_mutex_lock( &be->be_pcl_mutex );
 
-	LDAP_TAILQ_FOREACH( csne, op->o_bd->be_pending_csn_list, ce_csn_link ) {
+	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_TAILQ_FOREACH( csne, op->o_bd->be_pending_csn_list, ce_csn_link ) {
+	LDAP_TAILQ_FOREACH( csne, be->be_pending_csn_list, ce_csn_link ) {
 		if ( csne->ce_state == SLAP_CSN_COMMIT ) committed_csne = csne;
 		if ( csne->ce_state == SLAP_CSN_PENDING ) break;
 	}
 
-	if ( committed_csne ) ber_dupbv_x( csn, committed_csne->ce_csn, op->o_tmpmemctx );
-	ldap_pvt_thread_mutex_unlock( op->o_bd->be_pcl_mutexp );
+	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;
+	BackendDB *be = op->o_bd->bd_self;
 
-	ldap_pvt_thread_mutex_lock( op->o_bd->be_pcl_mutexp );
+	ldap_pvt_thread_mutex_lock( &be->be_pcl_mutex );
 
-	LDAP_TAILQ_FOREACH( csne, op->o_bd->be_pending_csn_list, ce_csn_link ) {
+	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;
 		}
 	}
 
-	ldap_pvt_thread_mutex_unlock( op->o_bd->be_pcl_mutexp );
+	ldap_pvt_thread_mutex_unlock( &be->be_pcl_mutex );
 }
 
 void
 slap_graduate_commit_csn( Operation *op )
 {
 	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( op->o_bd->be_pcl_mutexp );
+	ldap_pvt_thread_mutex_lock( &be->be_pcl_mutex );
 
-	LDAP_TAILQ_FOREACH( csne, op->o_bd->be_pending_csn_list, ce_csn_link ) {
+	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( op->o_bd->be_pending_csn_list,
+			LDAP_TAILQ_REMOVE( be->be_pending_csn_list,
 				csne, ce_csn_link );
-			ch_free( csne->ce_csn->bv_val );
-			ch_free( csne->ce_csn );
+			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;
 		}
 	}
 
-	ldap_pvt_thread_mutex_unlock( op->o_bd->be_pcl_mutexp );
+	ldap_pvt_thread_mutex_unlock( &be->be_pcl_mutex );
 
 	return;
 }
@@ -104,7 +132,7 @@ static struct berval ocbva[] = {
 	BER_BVC("top"),
 	BER_BVC("subentry"),
 	BER_BVC("syncProviderSubentry"),
-	{0,NULL}
+	BER_BVNULL
 };
 
 Entry *
@@ -113,11 +141,10 @@ slap_create_context_csn_entry(
 	struct berval *context_csn )
 {
 	Entry* e;
-	int rc;
 
 	struct berval bv;
 
-	e = (Entry *) ch_calloc( 1, sizeof( Entry ));
+	e = entry_alloc();
 
 	attr_merge( e, slap_schema.si_ad_objectClass,
 		ocbva, NULL );
@@ -131,8 +158,7 @@ slap_create_context_csn_entry(
 			context_csn, NULL );
 	}
 
-	bv.bv_val = "{}";
-	bv.bv_len = sizeof("{}")-1;
+	BER_BVSTR( &bv, "{}" );
 	attr_merge_one( e, slap_schema.si_ad_subtreeSpecification, &bv, NULL );
 
 	build_new_dn( &e->e_name, &be->be_nsuffix[0],
@@ -142,34 +168,46 @@ slap_create_context_csn_entry(
 	return e;
 }
 
+void
+slap_queue_csn(
+	Operation *op,
+	struct berval *csn )
+{
+	struct slap_csn_entry *pending;
+	BackendDB *be = op->o_bd->bd_self;
+
+	pending = (struct slap_csn_entry *) ch_calloc( 1,
+			sizeof( struct slap_csn_entry ));
+
+	Debug( LDAP_DEBUG_SYNC, "slap_queue_csn: queing %p %s\n", csn->bv_val, csn->bv_val, 0 );
+
+	ldap_pvt_thread_mutex_lock( &be->be_pcl_mutex );
+
+	ber_dupbv( &pending->ce_csn, csn );
+	ber_bvreplace_x( &op->o_csn, &pending->ce_csn, op->o_tmpmemctx );
+	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 )
 {
-	struct slap_csn_entry *pending;
-
 	if ( csn == NULL ) return LDAP_OTHER;
 
-	csn->bv_len = lutil_csnstr( csnbuf, len, 0, 0 );
-	csn->bv_val = csnbuf;
+	/* 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 );
 
-	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_mutexp );
-		ber_dupbv( &op->o_sync_csn, csn );
-		pending->ce_csn = ber_dupbv( NULL, csn );
-		pending->ce_connid = op->o_connid;
-		pending->ce_opid = op->o_opid;
-		pending->ce_state = SLAP_CSN_PENDING;
-		LDAP_TAILQ_INSERT_TAIL( op->o_bd->be_pending_csn_list,
-			pending, ce_csn_link );
-		ldap_pvt_thread_mutex_unlock( op->o_bd->be_pcl_mutexp );
-	}
+	ldap_pvt_thread_mutex_unlock( &gmtime_mutex );
 
 	return LDAP_SUCCESS;
 }