X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=servers%2Fslapd%2Fctxcsn.c;h=95d7ba6ed1e36dae33b7b8696fa0dfac15ea5f63;hb=f4d00f763f872f2b80aa470914872c8baeb61f0f;hp=87d8cbc3717464a32af500e8d61551df2216d694;hpb=7dcb68f6fa4bcdb3fbd883d9149ec4c23713d1c9;p=openldap

diff --git a/servers/slapd/ctxcsn.c b/servers/slapd/ctxcsn.c
index 87d8cbc371..95d7ba6ed1 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 2003-2005 The OpenLDAP Foundation.
+ * Copyright 2003-2009 The OpenLDAP Foundation.
  * Portions Copyright 2003 IBM Corporation.
  * All rights reserved.
  *
@@ -28,78 +28,99 @@
 
 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 *maxcsn,
-	struct berval *curcsn
+	int *foundit
 )
 {
 	struct slap_csn_entry *csne, *committed_csne = NULL;
+	BackendDB *be = op->o_bd->bd_self;
+	int sid = -1;
 
 	if ( maxcsn ) {
-		BER_BVZERO( 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 );
 
-	ldap_pvt_thread_mutex_lock( op->o_bd->be_pcl_mutexp );
+	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, 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 ) {
-			if ( curcsn ) *curcsn = csne->ce_csn;
 			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 ) {
-		if ( csne->ce_state == SLAP_CSN_COMMIT ) committed_csne = csne;
-		if ( csne->ce_state == SLAP_CSN_PENDING ) break;
+	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 && maxcsn ) *maxcsn = committed_csne->ce_csn;
-	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;
 
-#if 0
-	/* it is NULL when we get here from the frontendDB;
-	 * alternate fix: initialize frontendDB like all other backends */
-	assert( op->o_bd->be_pcl_mutexp != NULL );
-#endif
-	
-	if ( op->o_bd->be_pcl_mutexp == NULL ) return;
+	ldap_pvt_thread_mutex_lock( &be->be_pcl_mutex );
 
-	ldap_pvt_thread_mutex_lock( op->o_bd->be_pcl_mutexp );
-
-	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 );
+			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 );
 			}
@@ -109,7 +130,7 @@ slap_graduate_commit_csn( Operation *op )
 		}
 	}
 
-	ldap_pvt_thread_mutex_unlock( op->o_bd->be_pcl_mutexp );
+	ldap_pvt_thread_mutex_unlock( &be->be_pcl_mutex );
 
 	return;
 }
@@ -130,7 +151,7 @@ slap_create_context_csn_entry(
 
 	struct berval bv;
 
-	e = (Entry *) ch_calloc( 1, sizeof( Entry ));
+	e = entry_alloc();
 
 	attr_merge( e, slap_schema.si_ad_objectClass,
 		ocbva, NULL );
@@ -160,19 +181,24 @@ slap_queue_csn(
 	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 ));
-	ldap_pvt_thread_mutex_lock( op->o_bd->be_pcl_mutexp );
+
+	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 );
-	op->o_csn = pending->ce_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( op->o_bd->be_pending_csn_list,
+	LDAP_TAILQ_INSERT_TAIL( be->be_pending_csn_list,
 		pending, ce_csn_link );
-	ldap_pvt_thread_mutex_unlock( op->o_bd->be_pcl_mutexp );
+	ldap_pvt_thread_mutex_unlock( &be->be_pcl_mutex );
 }
 
 int
@@ -183,16 +209,13 @@ slap_get_csn(
 {
 	if ( csn == NULL ) return LDAP_OTHER;
 
-#ifndef HAVE_GMTIME_R
+	/* gmtime doesn't always need a mutex, but lutil_csnstr does */
 	ldap_pvt_thread_mutex_lock( &gmtime_mutex );
-#endif
-	csn->bv_len = lutil_csnstr( csn->bv_val, csn->bv_len, 0, 0 );
-#ifndef HAVE_GMTIME_R
-	ldap_pvt_thread_mutex_unlock( &gmtime_mutex );
-#endif
-
+	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;
 }