X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;ds=sidebyside;f=servers%2Fslapd%2Fconnection.c;h=c99f365624e08c395e55c09145aadb937eab8136;hb=c7305c4133eca44f2cf10f8b5f11dcfc0c1ff98b;hp=16433b2533a052bbcc1c608fb96c377047dcae5f;hpb=69fa2d9f93d7e6683d200ab4156c281d6475b5cd;p=openldap

diff --git a/servers/slapd/connection.c b/servers/slapd/connection.c
index 16433b2533..c99f365624 100644
--- a/servers/slapd/connection.c
+++ b/servers/slapd/connection.c
@@ -1,7 +1,7 @@
 /* $OpenLDAP$ */
 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
  *
- * Copyright 1998-2006 The OpenLDAP Foundation.
+ * Copyright 1998-2010 The OpenLDAP Foundation.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -48,33 +48,19 @@ static ldap_pvt_thread_mutex_t connections_mutex;
 static Connection *connections = NULL;
 
 static ldap_pvt_thread_mutex_t conn_nextid_mutex;
-static unsigned long conn_nextid = 0;
+static unsigned long conn_nextid = SLAPD_SYNC_SYNCCONN_OFFSET;
 
 static const char conn_lost_str[] = "connection lost";
 
-/* structure state (protected by connections_mutex) */
-#define SLAP_C_UNINITIALIZED	0x00	/* MUST BE ZERO (0) */
-#define SLAP_C_UNUSED			0x01
-#define SLAP_C_USED				0x02
-#define	SLAP_C_PENDING			0x03
-
-/* connection state (protected by c_mutex ) */
-#define SLAP_C_INVALID			0x00	/* MUST BE ZERO (0) */
-#define SLAP_C_INACTIVE			0x01	/* zero threads */
-#define SLAP_C_ACTIVE			0x02	/* one or more threads */
-#define SLAP_C_BINDING			0x03	/* binding */
-#define SLAP_C_CLOSING			0x04	/* closing */
-#define SLAP_C_CLIENT			0x05	/* outbound client conn */
-
 const char *
 connection_state2str( int state )
 {
 	switch( state ) {
 	case SLAP_C_INVALID:	return "!";
 	case SLAP_C_INACTIVE:	return "|";
+	case SLAP_C_CLOSING:	return "C";
 	case SLAP_C_ACTIVE:		return "";
 	case SLAP_C_BINDING:	return "B";
-	case SLAP_C_CLOSING:	return "C";
 	case SLAP_C_CLIENT:		return "L";
 	}
 
@@ -83,25 +69,19 @@ connection_state2str( int state )
 
 static Connection* connection_get( ber_socket_t s );
 
-#ifdef SLAP_LIGHTWEIGHT_DISPATCHER
-
 typedef struct conn_readinfo {
 	Operation *op;
 	ldap_pvt_thread_start_t *func;
 	void *arg;
+	void *ctx;
 	int nullop;
 } conn_readinfo;
 
 static int connection_input( Connection *c, conn_readinfo *cri );
-#else
-static int connection_input( Connection *c );
-#endif
 static void connection_close( Connection *c );
 
 static int connection_op_activate( Operation *op );
-#ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 static void connection_op_queue( Operation *op );
-#endif
 static int connection_resched( Connection *conn );
 static void connection_abandon( Connection *conn );
 static void connection_destroy( Connection *c );
@@ -169,8 +149,10 @@ int connections_destroy(void)
 		if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
 			ber_sockbuf_free( connections[i].c_sb );
 			ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
-			ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
-			ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
+			ldap_pvt_thread_mutex_destroy( &connections[i].c_write1_mutex );
+			ldap_pvt_thread_mutex_destroy( &connections[i].c_write2_mutex );
+			ldap_pvt_thread_cond_destroy( &connections[i].c_write1_cv );
+			ldap_pvt_thread_cond_destroy( &connections[i].c_write2_cv );
 #ifdef LDAP_SLAPI
 			if ( slapi_plugins_used ) {
 				slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION,
@@ -196,23 +178,22 @@ int connections_shutdown(void)
 	ber_socket_t i;
 
 	for ( i = 0; i < dtblsize; i++ ) {
-		if( connections[i].c_struct_state != SLAP_C_USED ) {
-			continue;
-		}
-		/* give persistent clients a chance to cleanup */
-		if( connections[i].c_conn_state == SLAP_C_CLIENT ) {
-			ldap_pvt_thread_pool_submit( &connection_pool,
-			connections[i].c_clientfunc, connections[i].c_clientarg );
-			continue;
+		if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
+			ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
+			if( connections[i].c_struct_state == SLAP_C_USED ) {
+
+				/* give persistent clients a chance to cleanup */
+				if( connections[i].c_conn_state == SLAP_C_CLIENT ) {
+					ldap_pvt_thread_pool_submit( &connection_pool,
+					connections[i].c_clientfunc, connections[i].c_clientarg );
+				} else {
+					/* c_mutex is locked */
+					connection_closing( &connections[i], "slapd shutdown" );
+					connection_close( &connections[i] );
+				}
+			}
+			ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
 		}
-
-		ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
-
-		/* c_mutex is locked */
-		connection_closing( &connections[i], "slapd shutdown" );
-		connection_close( &connections[i] );
-
-		ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
 	}
 
 	return 0;
@@ -223,28 +204,47 @@ int connections_shutdown(void)
  */
 int connections_timeout_idle(time_t now)
 {
-	int i = 0;
+	int i = 0, writers = 0;
 	int connindex;
 	Connection* c;
+	time_t old;
+
+	old = slapd_get_writetime();
 
 	for( c = connection_first( &connindex );
 		c != NULL;
 		c = connection_next( c, &connindex ) )
 	{
 		/* Don't timeout a slow-running request or a persistent
-		 * outbound connection */
-		if( c->c_n_ops_executing || c->c_conn_state == SLAP_C_CLIENT ) {
+		 * outbound connection. But if it has a writewaiter, see
+		 * if the waiter has been there too long.
+		 */
+		if(( c->c_n_ops_executing && !c->c_writewaiter)
+			|| c->c_conn_state == SLAP_C_CLIENT ) {
 			continue;
 		}
 
-		if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
+		if( global_idletimeout && 
+			difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
 			/* close it */
 			connection_closing( c, "idletimeout" );
 			connection_close( c );
 			i++;
+			continue;
+		}
+		if ( c->c_writewaiter && global_writetimeout ) {
+			writers = 1;
+			if( difftime( c->c_activitytime+global_writetimeout, now) < 0 ) {
+				/* close it */
+				connection_closing( c, "writetimeout" );
+				connection_close( c );
+				i++;
+			}
 		}
 	}
 	connection_done( c );
+	if ( old && !writers )
+		slapd_clr_writetime( old );
 
 	return i;
 }
@@ -261,63 +261,21 @@ static Connection* connection_get( ber_socket_t s )
 
 	if(s == AC_SOCKET_INVALID) return NULL;
 
-#ifndef HAVE_WINSOCK
 	assert( s < dtblsize );
 	c = &connections[s];
 
-#else
-	c = NULL;
-	{
-		ber_socket_t i, sd;
-
-		ldap_pvt_thread_mutex_lock( &connections_mutex );
-		for(i=0; i<dtblsize; i++) {
-			if( connections[i].c_struct_state == SLAP_C_PENDING )
-				continue;
-
-			if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
-				assert( connections[i].c_conn_state == SLAP_C_INVALID );
-				assert( connections[i].c_sb == 0 );
-				break;
-			}
-
-			ber_sockbuf_ctrl( connections[i].c_sb,
-				LBER_SB_OPT_GET_FD, &sd );
-
-			if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
-				assert( connections[i].c_conn_state == SLAP_C_INVALID );
-				assert( sd == AC_SOCKET_INVALID );
-				continue;
-			}
-
-			/* state can actually change from used -> unused by resched,
-			 * so don't assert details here.
-			 */
-
-			if( sd == s ) {
-				c = &connections[i];
-				break;
-			}
-		}
-		ldap_pvt_thread_mutex_unlock( &connections_mutex );
-	}
-#endif
-
 	if( c != NULL ) {
-		ber_socket_t	sd;
+		ldap_pvt_thread_mutex_lock( &c->c_mutex );
 
 		assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
 
-		ldap_pvt_thread_mutex_lock( &c->c_mutex );
-
-		ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 		if( c->c_struct_state != SLAP_C_USED ) {
 			/* connection must have been closed due to resched */
 
 			assert( c->c_conn_state == SLAP_C_INVALID );
-			assert( sd == AC_SOCKET_INVALID );
+			assert( c->c_sd == AC_SOCKET_INVALID );
 
-			Debug( LDAP_DEBUG_TRACE,
+			Debug( LDAP_DEBUG_CONNS,
 				"connection_get(%d): connection not used\n",
 				s, 0, 0 );
 
@@ -333,7 +291,7 @@ static Connection* connection_get( ber_socket_t s )
 
 		assert( c->c_struct_state == SLAP_C_USED );
 		assert( c->c_conn_state != SLAP_C_INVALID );
-		assert( sd != AC_SOCKET_INVALID );
+		assert( c->c_sd != AC_SOCKET_INVALID );
 
 #ifndef SLAPD_MONITOR
 		if ( global_idletimeout > 0 )
@@ -351,18 +309,20 @@ static void connection_return( Connection *c )
 	ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 }
 
-long connection_init(
+Connection * connection_init(
 	ber_socket_t s,
 	Listener *listener,
 	const char* dnsname,
 	const char* peername,
 	int flags,
 	slap_ssf_t ssf,
-	struct berval *authid )
+	struct berval *authid
+	LDAP_PF_LOCAL_SENDMSG_ARG(struct berval *peerbv))
 {
 	unsigned long id;
 	Connection *c;
 	int doinit = 0;
+	ber_socket_t sfd = SLAP_FD2SOCK(s);
 
 	assert( connections != NULL );
 
@@ -371,17 +331,16 @@ long connection_init(
 	assert( peername != NULL );
 
 #ifndef HAVE_TLS
-	assert( flags != CONN_IS_TLS );
+	assert( !( flags & CONN_IS_TLS ));
 #endif
 
 	if( s == AC_SOCKET_INVALID ) {
 		Debug( LDAP_DEBUG_ANY,
 			"connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
-		return -1;
+		return NULL;
 	}
 
 	assert( s >= 0 );
-#ifndef HAVE_WINSOCK
 	assert( s < dtblsize );
 	c = &connections[s];
 	if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
@@ -389,55 +348,6 @@ long connection_init(
 	} else {
 		assert( c->c_struct_state == SLAP_C_UNUSED );
 	}
-#else
-	{
-		ber_socket_t i;
-		c = NULL;
-
-		ldap_pvt_thread_mutex_lock( &connections_mutex );
-		for( i=0; i < dtblsize; i++) {
-			ber_socket_t	sd;
-
-			if ( connections[i].c_struct_state == SLAP_C_PENDING )
-				continue;
-
-			if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
-				assert( connections[i].c_sb == 0 );
-				c = &connections[i];
-				c->c_struct_state = SLAP_C_PENDING;
-				doinit = 1;
-				break;
-			}
-
-			sd = AC_SOCKET_INVALID;
-			if (connections[i].c_sb != NULL) {
-				ber_sockbuf_ctrl( connections[i].c_sb,
-					LBER_SB_OPT_GET_FD, &sd );
-			}
-
-			if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
-				assert( sd == AC_SOCKET_INVALID );
-				c = &connections[i];
-				c->c_struct_state = SLAP_C_PENDING;
-				break;
-			}
-
-			if( connections[i].c_conn_state == SLAP_C_CLIENT ) continue;
-
-			assert( connections[i].c_struct_state == SLAP_C_USED );
-			assert( connections[i].c_conn_state != SLAP_C_INVALID );
-			assert( sd != AC_SOCKET_INVALID );
-		}
-		ldap_pvt_thread_mutex_unlock( &connections_mutex );
-
-		if( c == NULL ) {
-			Debug( LDAP_DEBUG_ANY,
-				"connection_init(%d): connection table full "
-				"(%d/%d)\n", s, i, dtblsize);
-			return -1;
-		}
-	}
-#endif
 
 	if( doinit ) {
 		c->c_send_ldap_result = slap_send_ldap_result;
@@ -481,8 +391,10 @@ long connection_init(
 
 		/* should check status of thread calls */
 		ldap_pvt_thread_mutex_init( &c->c_mutex );
-		ldap_pvt_thread_mutex_init( &c->c_write_mutex );
-		ldap_pvt_thread_cond_init( &c->c_write_cv );
+		ldap_pvt_thread_mutex_init( &c->c_write1_mutex );
+		ldap_pvt_thread_mutex_init( &c->c_write2_mutex );
+		ldap_pvt_thread_cond_init( &c->c_write1_cv );
+		ldap_pvt_thread_cond_init( &c->c_write2_cv );
 
 #ifdef LDAP_SLAPI
 		if ( slapi_plugins_used ) {
@@ -514,17 +426,22 @@ long connection_init(
 	assert( c->c_sasl_bindop == NULL );
 	assert( c->c_currentber == NULL );
 	assert( c->c_writewaiter == 0);
+	assert( c->c_writers == 0);
 
 	c->c_listener = listener;
+	c->c_sd = s;
 
-	if ( flags == CONN_IS_CLIENT ) {
+	if ( flags & CONN_IS_CLIENT ) {
+		c->c_connid = 0;
+		ldap_pvt_thread_mutex_lock( &connections_mutex );
 		c->c_conn_state = SLAP_C_CLIENT;
 		c->c_struct_state = SLAP_C_USED;
+		ldap_pvt_thread_mutex_unlock( &connections_mutex );
 		c->c_close_reason = "?";			/* should never be needed */
-		ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_FD, &s );
+		ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_FD, &sfd );
 		ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 
-		return 0;
+		return c;
 	}
 
 	ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
@@ -551,25 +468,39 @@ long connection_init(
 
 #ifdef LDAP_CONNECTIONLESS
 	c->c_is_udp = 0;
-	if( flags == CONN_IS_UDP ) {
+	if( flags & CONN_IS_UDP ) {
 		c->c_is_udp = 1;
 #ifdef LDAP_DEBUG
 		ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 			LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
 #endif
 		ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
-			LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
+			LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
 		ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 			LBER_SBIOD_LEVEL_PROVIDER, NULL );
 	} else
+#endif /* LDAP_CONNECTIONLESS */
+#ifdef LDAP_PF_LOCAL
+	if ( flags & CONN_IS_IPC ) {
+#ifdef LDAP_DEBUG
+		ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
+			LBER_SBIOD_LEVEL_PROVIDER, (void*)"ipc_" );
 #endif
+		ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_fd,
+			LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
+#ifdef LDAP_PF_LOCAL_SENDMSG
+		if ( !BER_BVISEMPTY( peerbv ))
+			ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_UNGET_BUF, peerbv );
+#endif
+	} else
+#endif /* LDAP_PF_LOCAL */
 	{
 #ifdef LDAP_DEBUG
 		ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 			LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 #endif
 		ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
-			LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
+			LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
 	}
 
 #ifdef LDAP_DEBUG
@@ -589,15 +520,17 @@ long connection_init(
 	id = c->c_connid = conn_nextid++;
 	ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
 
+	ldap_pvt_thread_mutex_lock( &connections_mutex );
 	c->c_conn_state = SLAP_C_INACTIVE;
 	c->c_struct_state = SLAP_C_USED;
+	ldap_pvt_thread_mutex_unlock( &connections_mutex );
 	c->c_close_reason = "?";			/* should never be needed */
 
 	c->c_ssf = c->c_transport_ssf = ssf;
 	c->c_tls_ssf = 0;
 
 #ifdef HAVE_TLS
-	if ( flags == CONN_IS_TLS ) {
+	if ( flags & CONN_IS_TLS ) {
 		c->c_is_tls = 1;
 		c->c_needs_tls_accept = 1;
 	} else {
@@ -614,7 +547,7 @@ long connection_init(
 
 	backend_connection_init(c);
 
-	return id;
+	return c;
 }
 
 void connection2anonymous( Connection *c )
@@ -653,10 +586,10 @@ void connection2anonymous( Connection *c )
 static void
 connection_destroy( Connection *c )
 {
-	ber_socket_t	sd;
 	unsigned long	connid;
 	const char		*close_reason;
 	Sockbuf			*sb;
+	ber_socket_t	sd;
 
 	assert( connections != NULL );
 	assert( c != NULL );
@@ -670,6 +603,7 @@ connection_destroy( Connection *c )
 	assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
 #endif
 	assert( c->c_writewaiter == 0);
+	assert( c->c_writers == 0);
 
 	/* only for stats (print -1 as "%lu" may give unexpected results ;) */
 	connid = c->c_connid;
@@ -719,6 +653,8 @@ connection_destroy( Connection *c )
 	}
 #endif
 
+	sd = c->c_sd;
+	c->c_sd = AC_SOCKET_INVALID;
 	c->c_conn_state = SLAP_C_INVALID;
 	c->c_struct_state = SLAP_C_UNUSED;
 	c->c_close_reason = "?";			/* should never be needed */
@@ -730,34 +666,31 @@ connection_destroy( Connection *c )
 		ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 	}
 
-	ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
-
 	/* c must be fully reset by this point; when we call slapd_remove
 	 * it may get immediately reused by a new connection.
 	 */
 	if ( sd != AC_SOCKET_INVALID ) {
 		slapd_remove( sd, sb, 1, 0, 0 );
 
-		Statslog( LDAP_DEBUG_STATS, (close_reason
-									 ? "conn=%lu fd=%ld closed (%s)\n"
-									 : "conn=%lu fd=%ld closed\n"),
-			connid, (long) sd, close_reason, 0, 0 );
+		if ( close_reason == NULL ) {
+			Statslog( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed\n",
+				connid, (long) sd, 0, 0, 0 );
+		} else {
+			Statslog( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed (%s)\n",
+				connid, (long) sd, close_reason, 0, 0 );
+		}
 	}
 }
 
-int connection_state_closing( Connection *c )
+int connection_valid( Connection *c )
 {
 	/* c_mutex must be locked by caller */
 
-	int state;
 	assert( c != NULL );
-	assert( c->c_struct_state == SLAP_C_USED );
 
-	state = c->c_conn_state;
-
-	assert( state != SLAP_C_INVALID );
-
-	return state == SLAP_C_CLOSING;
+	return c->c_struct_state == SLAP_C_USED &&
+		c->c_conn_state >= SLAP_C_ACTIVE &&
+		c->c_conn_state <= SLAP_C_CLIENT;
 }
 
 static void connection_abandon( Connection *c )
@@ -786,7 +719,7 @@ static void connection_abandon( Connection *c )
 	while ( (o = LDAP_STAILQ_FIRST( &c->c_txn_ops )) != NULL) {
 		LDAP_STAILQ_REMOVE_HEAD( &c->c_txn_ops, o_next );
 		LDAP_STAILQ_NEXT(o, o_next) = NULL;
-		slap_op_free( o );
+		slap_op_free( o, NULL );
 	}
 
 	/* clear transaction */
@@ -798,7 +731,33 @@ static void connection_abandon( Connection *c )
 	while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 		LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 		LDAP_STAILQ_NEXT(o, o_next) = NULL;
-		slap_op_free( o );
+		slap_op_free( o, NULL );
+	}
+}
+
+static void
+connection_wake_writers( Connection *c )
+{
+	/* wake write blocked operations */
+	ldap_pvt_thread_mutex_lock( &c->c_write1_mutex );
+	if ( c->c_writers > 0 ) {
+		c->c_writers = -c->c_writers;
+		ldap_pvt_thread_cond_broadcast( &c->c_write1_cv );
+		ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
+		if ( c->c_writewaiter ) {
+			ldap_pvt_thread_mutex_lock( &c->c_write2_mutex );
+			ldap_pvt_thread_cond_signal( &c->c_write2_cv );
+			slapd_clr_write( c->c_sd, 1 );
+			ldap_pvt_thread_mutex_unlock( &c->c_write2_mutex );
+		}
+		ldap_pvt_thread_mutex_lock( &c->c_write1_mutex );
+		while ( c->c_writers ) {
+			ldap_pvt_thread_cond_wait( &c->c_write1_cv, &c->c_write1_mutex );
+		}
+		ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
+	} else {
+		ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
+		slapd_clr_write( c->c_sd, 1 );
 	}
 }
 
@@ -806,33 +765,29 @@ void connection_closing( Connection *c, const char *why )
 {
 	assert( connections != NULL );
 	assert( c != NULL );
-	assert( c->c_struct_state == SLAP_C_USED );
+
+	if ( c->c_struct_state != SLAP_C_USED ) return;
+
 	assert( c->c_conn_state != SLAP_C_INVALID );
 
 	/* c_mutex must be locked by caller */
 
 	if( c->c_conn_state != SLAP_C_CLOSING ) {
-		ber_socket_t	sd;
-
-		ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
-		Debug( LDAP_DEBUG_TRACE,
+		Debug( LDAP_DEBUG_CONNS,
 			"connection_closing: readying conn=%lu sd=%d for close\n",
-			c->c_connid, sd, 0 );
+			c->c_connid, c->c_sd, 0 );
 		/* update state to closing */
 		c->c_conn_state = SLAP_C_CLOSING;
 		c->c_close_reason = why;
 
 		/* don't listen on this port anymore */
-		slapd_clr_read( sd, 0 );
+		slapd_clr_read( c->c_sd, 0 );
 
 		/* abandon active operations */
 		connection_abandon( c );
 
 		/* wake write blocked operations */
-		slapd_clr_write( sd, 1 );
-		if ( c->c_writewaiter ) {
-			ldap_pvt_thread_cond_signal( &c->c_write_cv );
-		}
+		connection_wake_writers( c );
 
 	} else if( why == NULL && c->c_close_reason == conn_lost_str ) {
 		/* Client closed connection after doing Unbind. */
@@ -840,27 +795,30 @@ void connection_closing( Connection *c, const char *why )
 	}
 }
 
-static void connection_close( Connection *c )
+static void
+connection_close( Connection *c )
 {
-	ber_socket_t	sd;
-
 	assert( connections != NULL );
 	assert( c != NULL );
-	assert( c->c_struct_state == SLAP_C_USED );
+
+	if ( c->c_struct_state != SLAP_C_USED ) return;
+
 	assert( c->c_conn_state == SLAP_C_CLOSING );
 
-	/* note: c_mutex should be locked by caller */
+	/* NOTE: c_mutex should be locked by caller */
 
-	ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
-	if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
-		Debug( LDAP_DEBUG_TRACE,
+	if ( !LDAP_STAILQ_EMPTY(&c->c_ops) ||
+		!LDAP_STAILQ_EMPTY(&c->c_pending_ops) )
+	{
+		Debug( LDAP_DEBUG_CONNS,
 			"connection_close: deferring conn=%lu sd=%d\n",
-			c->c_connid, sd, 0 );
+			c->c_connid, c->c_sd, 0 );
 		return;
 	}
 
 	Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
-		c->c_connid, sd, 0 );
+		c->c_connid, c->c_sd, 0 );
+
 	connection_destroy( c );
 }
 
@@ -906,13 +864,14 @@ Connection* connection_next( Connection *c, ber_socket_t *index )
 
 	ldap_pvt_thread_mutex_lock( &connections_mutex );
 	for(; *index < dtblsize; (*index)++) {
+		int c_struct;
 		if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
+			/* FIXME: accessing c_conn_state without locking c_mutex */
 			assert( connections[*index].c_conn_state == SLAP_C_INVALID );
-			break;
+			continue;
 		}
 
 		if( connections[*index].c_struct_state == SLAP_C_USED ) {
-			assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 			c = &connections[(*index)++];
 			if ( ldap_pvt_thread_mutex_trylock( &c->c_mutex )) {
 				/* avoid deadlock */
@@ -925,10 +884,15 @@ Connection* connection_next( Connection *c, ber_socket_t *index )
 					continue;
 				}
 			}
+			assert( c->c_conn_state != SLAP_C_INVALID );
 			break;
 		}
 
-		assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
+		c_struct = connections[*index].c_struct_state;
+		if ( c_struct == SLAP_C_PENDING )
+			continue;
+		assert( c_struct == SLAP_C_UNUSED );
+		/* FIXME: accessing c_conn_state without locking c_mutex */
 		assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 	}
 
@@ -953,24 +917,24 @@ void connection_done( Connection *c )
 /* FIXME: returns 0 in case of failure */
 #define INCR_OP_INITIATED(index) \
 	do { \
-		ldap_pvt_thread_mutex_lock( &slap_counters.sc_ops_mutex ); \
-		ldap_pvt_mp_add_ulong(slap_counters.sc_ops_initiated_[(index)], 1); \
-		ldap_pvt_thread_mutex_unlock( &slap_counters.sc_ops_mutex ); \
+		ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
+		ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_initiated_[(index)], 1); \
+		ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
 	} while (0)
 #define INCR_OP_COMPLETED(index) \
 	do { \
-		ldap_pvt_thread_mutex_lock( &slap_counters.sc_ops_mutex ); \
-		ldap_pvt_mp_add_ulong(slap_counters.sc_ops_completed, 1); \
-		ldap_pvt_mp_add_ulong(slap_counters.sc_ops_completed_[(index)], 1); \
-		ldap_pvt_thread_mutex_unlock( &slap_counters.sc_ops_mutex ); \
+		ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
+		ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed, 1); \
+		ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed_[(index)], 1); \
+		ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
 	} while (0)
 #else /* !SLAPD_MONITOR */
 #define INCR_OP_INITIATED(index) do { } while (0)
 #define INCR_OP_COMPLETED(index) \
 	do { \
-		ldap_pvt_thread_mutex_lock( &slap_counters.sc_ops_mutex ); \
-		ldap_pvt_mp_add_ulong(slap_counters.sc_ops_completed, 1); \
-		ldap_pvt_thread_mutex_unlock( &slap_counters.sc_ops_mutex ); \
+		ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
+		ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed, 1); \
+		ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
 	} while (0)
 #endif /* !SLAPD_MONITOR */
 
@@ -980,34 +944,92 @@ void connection_done( Connection *c )
 static BI_op_func *opfun[] = {
 	do_bind,
 	do_unbind,
+	do_search,
+	do_compare,
+	do_modify,
+	do_modrdn,
 	do_add,
 	do_delete,
-	do_modrdn,
-	do_modify,
-	do_compare,
-	do_search,
 	do_abandon,
 	do_extended,
 	NULL
 };
 
+/* Counters are per-thread, not per-connection.
+ */
+static void
+conn_counter_destroy( void *key, void *data )
+{
+	slap_counters_t **prev, *sc;
+
+	ldap_pvt_thread_mutex_lock( &slap_counters.sc_mutex );
+	for ( prev = &slap_counters.sc_next, sc = slap_counters.sc_next; sc;
+		prev = &sc->sc_next, sc = sc->sc_next ) {
+		if ( sc == data ) {
+			int i;
+
+			*prev = sc->sc_next;
+			/* Copy data to main counter */
+			ldap_pvt_mp_add( slap_counters.sc_bytes, sc->sc_bytes );
+			ldap_pvt_mp_add( slap_counters.sc_pdu, sc->sc_pdu );
+			ldap_pvt_mp_add( slap_counters.sc_entries, sc->sc_entries );
+			ldap_pvt_mp_add( slap_counters.sc_refs, sc->sc_refs );
+			ldap_pvt_mp_add( slap_counters.sc_ops_initiated, sc->sc_ops_initiated );
+			ldap_pvt_mp_add( slap_counters.sc_ops_completed, sc->sc_ops_completed );
+#ifdef SLAPD_MONITOR
+			for ( i = 0; i < SLAP_OP_LAST; i++ ) {
+				ldap_pvt_mp_add( slap_counters.sc_ops_initiated_[ i ], sc->sc_ops_initiated_[ i ] );
+				ldap_pvt_mp_add( slap_counters.sc_ops_initiated_[ i ], sc->sc_ops_completed_[ i ] );
+			}
+#endif /* SLAPD_MONITOR */
+			slap_counters_destroy( sc );
+			ber_memfree_x( data, NULL );
+			break;
+		}
+	}
+	ldap_pvt_thread_mutex_unlock( &slap_counters.sc_mutex );
+}
+
+static void
+conn_counter_init( Operation *op, void *ctx )
+{
+	slap_counters_t *sc;
+	void *vsc = NULL;
+
+	if ( ldap_pvt_thread_pool_getkey(
+			ctx, (void *)conn_counter_init, &vsc, NULL ) || !vsc ) {
+		vsc = ch_malloc( sizeof( slap_counters_t ));
+		sc = vsc;
+		slap_counters_init( sc );
+		ldap_pvt_thread_pool_setkey( ctx, (void*)conn_counter_init, vsc,
+			conn_counter_destroy, NULL, NULL );
+
+		ldap_pvt_thread_mutex_lock( &slap_counters.sc_mutex );
+		sc->sc_next = slap_counters.sc_next;
+		slap_counters.sc_next = sc;
+		ldap_pvt_thread_mutex_unlock( &slap_counters.sc_mutex );
+	}
+	op->o_counters = vsc;
+}
+
 static void *
 connection_operation( void *ctx, void *arg_v )
 {
-	int rc = LDAP_OTHER;
+	int rc = LDAP_OTHER, cancel;
 	Operation *op = arg_v;
 	SlapReply rs = {REP_RESULT};
 	ber_tag_t tag = op->o_tag;
-	int opidx = -1;
+	slap_op_t opidx = SLAP_OP_LAST;
 	Connection *conn = op->o_conn;
 	void *memctx = NULL;
 	void *memctx_null = NULL;
 	ber_len_t memsiz;
 
-	ldap_pvt_thread_mutex_lock( &slap_counters.sc_ops_mutex );
+	conn_counter_init( op, ctx );
+	ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex );
 	/* FIXME: returns 0 in case of failure */
-	ldap_pvt_mp_add_ulong(slap_counters.sc_ops_initiated, 1);
-	ldap_pvt_thread_mutex_unlock( &slap_counters.sc_ops_mutex );
+	ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_initiated, 1);
+	ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex );
 
 	op->o_threadctx = ctx;
 	op->o_tid = ldap_pvt_thread_pool_tid( ctx );
@@ -1069,7 +1091,7 @@ connection_operation( void *ctx, void *arg_v )
 #endif
 	memsiz = SLAP_SLAB_SIZE;
 
-	memctx = slap_sl_mem_create( memsiz, SLAP_SLAB_STACK, ctx );
+	memctx = slap_sl_mem_create( memsiz, SLAP_SLAB_STACK, ctx, 1 );
 	op->o_tmpmemctx = memctx;
 	op->o_tmpmfuncs = &slap_sl_mfuncs;
 	if ( tag != LDAP_REQ_ADD && tag != LDAP_REQ_MODIFY ) {
@@ -1081,53 +1103,8 @@ connection_operation( void *ctx, void *arg_v )
 	}
 	}
 
-	switch ( tag ) {
-	case LDAP_REQ_BIND:
-		opidx = SLAP_OP_BIND;
-		break;
-
-	case LDAP_REQ_UNBIND:
-		opidx = SLAP_OP_UNBIND;
-		break;
-
-	case LDAP_REQ_ADD:
-		opidx = SLAP_OP_ADD;
-		break;
-
-	case LDAP_REQ_DELETE:
-		opidx = SLAP_OP_DELETE;
-		break;
-
-	case LDAP_REQ_MODRDN:
-		opidx = SLAP_OP_MODRDN;
-		break;
-
-	case LDAP_REQ_MODIFY:
-		opidx = SLAP_OP_MODIFY;
-		break;
-
-	case LDAP_REQ_COMPARE:
-		opidx = SLAP_OP_COMPARE;
-		break;
-
-	case LDAP_REQ_SEARCH:
-		opidx = SLAP_OP_SEARCH;
-		break;
-
-	case LDAP_REQ_ABANDON:
-		opidx = SLAP_OP_ABANDON;
-		break;
-
-	case LDAP_REQ_EXTENDED:
-		opidx = SLAP_OP_EXTENDED;
-		break;
-
-	default:
-		/* not reachable */
-		assert( 0 );
-	}
-
-	assert( opidx > -1 );
+	opidx = slap_req2op( tag );
+	assert( opidx != SLAP_OP_LAST );
 	INCR_OP_INITIATED( opidx );
 	rc = (*(opfun[opidx]))( op, &rs );
 
@@ -1135,33 +1112,43 @@ operations_error:
 	if ( rc == SLAPD_DISCONNECT ) {
 		tag = LBER_ERROR;
 
-	} else if ( opidx > -1 ) {
+	} else if ( opidx != SLAP_OP_LAST ) {
 		/* increment completed operations count 
 		 * only if operation was initiated
 		 * and rc != SLAPD_DISCONNECT */
 		INCR_OP_COMPLETED( opidx );
 	}
 
-	if ( op->o_cancel == SLAP_CANCEL_REQ ) {
-		if ( rc == SLAPD_ABANDON ) {
-			op->o_cancel = SLAP_CANCEL_ACK;
-		} else {
-			op->o_cancel = LDAP_TOO_LATE;
+	ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+
+	if ( opidx == SLAP_OP_BIND && conn->c_conn_state == SLAP_C_BINDING )
+		conn->c_conn_state = SLAP_C_ACTIVE;
+
+	cancel = op->o_cancel;
+	if ( cancel != SLAP_CANCEL_NONE && cancel != SLAP_CANCEL_DONE ) {
+		if ( cancel == SLAP_CANCEL_REQ ) {
+			op->o_cancel = rc == SLAPD_ABANDON
+				? SLAP_CANCEL_ACK : LDAP_TOO_LATE;
 		}
-	}
-	while ( op->o_cancel != SLAP_CANCEL_NONE &&
-		op->o_cancel != SLAP_CANCEL_DONE )
-	{
-		ldap_pvt_thread_yield();
-	}
 
-	ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+		do {
+			/* Fake a cond_wait with thread_yield, then
+			 * verify the result properly mutex-protected.
+			 */
+			ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
+			do {
+				ldap_pvt_thread_yield();
+			} while ( (cancel = op->o_cancel) != SLAP_CANCEL_NONE
+					&& cancel != SLAP_CANCEL_DONE );
+			ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+		} while ( (cancel = op->o_cancel) != SLAP_CANCEL_NONE
+				&& cancel != SLAP_CANCEL_DONE );
+	}
 
 	ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx_null );
 
-	LDAP_STAILQ_REMOVE( &conn->c_ops, op, slap_op, o_next);
+	LDAP_STAILQ_REMOVE( &conn->c_ops, op, Operation, o_next);
 	LDAP_STAILQ_NEXT(op, o_next) = NULL;
-	slap_op_free( op );
 	conn->c_n_ops_executing--;
 	conn->c_n_ops_completed++;
 
@@ -1176,53 +1163,53 @@ operations_error:
 
 	connection_resched( conn );
 	ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
+	slap_op_free( op, ctx );
 	return NULL;
 }
 
 static const Listener dummy_list = { BER_BVC(""), BER_BVC("") };
 
-int connection_client_setup(
+Connection *connection_client_setup(
 	ber_socket_t s,
 	ldap_pvt_thread_start_t *func,
 	void *arg )
 {
-	int rc;
 	Connection *c;
+	ber_socket_t sfd = SLAP_SOCKNEW( s );
 
-	rc = connection_init( s, (Listener *)&dummy_list, "", "",
-		CONN_IS_CLIENT, 0, NULL );
-	if ( rc < 0 ) return -1;
+	c = connection_init( sfd, (Listener *)&dummy_list, "", "",
+		CONN_IS_CLIENT, 0, NULL
+		LDAP_PF_LOCAL_SENDMSG_ARG(NULL));
+	if ( c ) {
+		c->c_clientfunc = func;
+		c->c_clientarg = arg;
 
-	c = connection_get( s );
-	c->c_clientfunc = func;
-	c->c_clientarg = arg;
-
-	slapd_add_internal( s, 0 );
-	slapd_set_read( s, 1 );
-	connection_return( c );
-	return 0;
+		slapd_add_internal( sfd, 0 );
+	}
+	return c;
 }
 
 void connection_client_enable(
-	ber_socket_t s )
+	Connection *c )
 {
-	slapd_set_read( s, 1 );
+	slapd_set_read( c->c_sd, 1 );
 }
 
 void connection_client_stop(
-	ber_socket_t s )
+	Connection *c )
 {
-	Connection *c;
 	Sockbuf *sb;
+	ber_socket_t s = c->c_sd;
 
 	/* get (locked) connection */
 	c = connection_get( s );
-	
+
 	assert( c->c_conn_state == SLAP_C_CLIENT );
 
 	c->c_listener = NULL;
 	c->c_conn_state = SLAP_C_INVALID;
 	c->c_struct_state = SLAP_C_UNUSED;
+	c->c_sd = AC_SOCKET_INVALID;
 	c->c_close_reason = "?";			/* should never be needed */
 	sb = c->c_sb;
 	c->c_sb = ber_sockbuf_alloc( );
@@ -1235,20 +1222,19 @@ void connection_client_stop(
 	connection_return( c );
 }
 
-#ifdef SLAP_LIGHTWEIGHT_DISPATCHER
-
 static int connection_read( ber_socket_t s, conn_readinfo *cri );
 
 static void* connection_read_thread( void* ctx, void* argv )
 {
 	int rc ;
-	conn_readinfo cri = { NULL, NULL, NULL, 0 };
+	conn_readinfo cri = { NULL, NULL, NULL, NULL, 0 };
 	ber_socket_t s = (long)argv;
 
 	/*
 	 * read incoming LDAP requests. If there is more than one,
 	 * the first one is returned with new_op
 	 */
+	cri.ctx = ctx;
 	if( ( rc = connection_read( s, &cri ) ) < 0 ) {
 		Debug( LDAP_DEBUG_CONNS, "connection_read(%d) error\n", s, 0, 0 );
 		return (void*)(long)rc;
@@ -1277,6 +1263,11 @@ int connection_read_activate( ber_socket_t s )
 	if ( rc )
 		return rc;
 
+	/* Don't let blocked writers block a pause request */
+	if ( connections[s].c_writewaiter &&
+		ldap_pvt_thread_pool_pausing( &connection_pool ))
+		connection_wake_writers( &connections[s] );
+
 	rc = ldap_pvt_thread_pool_submit( &connection_pool,
 		connection_read_thread, (void *)(long)s );
 
@@ -1288,14 +1279,9 @@ int connection_read_activate( ber_socket_t s )
 
 	return rc;
 }
-#endif
 
-#ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 static int
 connection_read( ber_socket_t s, conn_readinfo *cri )
-#else
-int connection_read(ber_socket_t s)
-#endif
 {
 	int rc = 0;
 	Connection *c;
@@ -1316,7 +1302,7 @@ int connection_read(ber_socket_t s)
 	c->c_n_read++;
 
 	if( c->c_conn_state == SLAP_C_CLOSING ) {
-		Debug( LDAP_DEBUG_TRACE,
+		Debug( LDAP_DEBUG_CONNS,
 			"connection_read(%d): closing, ignoring input for id=%lu\n",
 			s, c->c_connid, 0 );
 		connection_return( c );
@@ -1324,15 +1310,9 @@ int connection_read(ber_socket_t s)
 	}
 
 	if ( c->c_conn_state == SLAP_C_CLIENT ) {
-#ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 		cri->func = c->c_clientfunc;
 		cri->arg = c->c_clientarg;
 		/* read should already be cleared */
-#else
-		slapd_clr_read( s, 0 );
-		ldap_pvt_thread_pool_submit( &connection_pool,
-			c->c_clientfunc, c->c_clientarg );
-#endif
 		connection_return( c );
 		return 0;
 	}
@@ -1382,15 +1362,17 @@ int connection_read(ber_socket_t s)
 			    c->c_connid, (int) s, c->c_tls_ssf, c->c_ssf, 0 );
 			slap_sasl_external( c, c->c_tls_ssf, &authid );
 			if ( authid.bv_val ) free( authid.bv_val );
+		} else if ( rc == 1 && ber_sockbuf_ctrl( c->c_sb,
+			LBER_SB_OPT_NEEDS_WRITE, NULL )) {	/* need to retry */
+			slapd_set_write( s, 1 );
+			connection_return( c );
+			return 0;
 		}
 
 		/* if success and data is ready, fall thru to data input loop */
 		if( !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
 		{
-#ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 			slapd_set_read( s, 1 );
-#endif
-
 			connection_return( c );
 			return 0;
 		}
@@ -1401,10 +1383,7 @@ int connection_read(ber_socket_t s)
 	if ( c->c_sasl_layers ) {
 		/* If previous layer is not removed yet, give up for now */
 		if ( !c->c_sasl_sockctx ) {
-#ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 			slapd_set_read( s, 1 );
-#endif
-
 			connection_return( c );
 			return 0;
 		}
@@ -1432,15 +1411,11 @@ int connection_read(ber_socket_t s)
 
 	do {
 		/* How do we do this without getting into a busy loop ? */
-#ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 		rc = connection_input( c, cri );
-#else
-		rc = connection_input( c );
-#endif
 	}
 #ifdef DATA_READY_LOOP
 	while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ));
-#elif CONNECTION_INPUT_LOOP
+#elif defined CONNECTION_INPUT_LOOP
 	while(!rc);
 #else
 	while(0);
@@ -1458,33 +1433,18 @@ int connection_read(ber_socket_t s)
 		return 0;
 	}
 
-#ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 	if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
 		slapd_set_write( s, 0 );
 	}
 
 	slapd_set_read( s, 1 );
-#else
-	if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
-		slapd_set_read( s, 1 );
-	}
-
-	if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
-		slapd_set_write( s, 1 );
-	}
-#endif
-
 	connection_return( c );
 
 	return 0;
 }
 
 static int
-#ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 connection_input( Connection *conn , conn_readinfo *cri )
-#else
-connection_input( Connection *conn )
-#endif
 {
 	Operation *op;
 	ber_tag_t	tag;
@@ -1497,6 +1457,7 @@ connection_input( Connection *conn )
 	char 		*cdn = NULL;
 #endif
 	char *defer = NULL;
+	void *ctx;
 
 	if ( conn->c_currentber == NULL &&
 		( conn->c_currentber = ber_alloc()) == NULL )
@@ -1505,7 +1466,7 @@ connection_input( Connection *conn )
 		return -1;
 	}
 
-	errno = 0;
+	sock_errset(0);
 
 #ifdef LDAP_CONNECTIONLESS
 	if ( conn->c_is_udp ) {
@@ -1525,16 +1486,13 @@ connection_input( Connection *conn )
 
 	tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
 	if ( tag != LDAP_TAG_MESSAGE ) {
-		int err = errno;
-		ber_socket_t	sd;
+		int err = sock_errno();
 
-		ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
-
-		Debug( LDAP_DEBUG_TRACE,
-			"ber_get_next on fd %d failed errno=%d (%s)\n",
-			sd, err, sock_errstr(err) );
 		if ( err != EWOULDBLOCK && err != EAGAIN ) {
 			/* log, close and send error */
+			Debug( LDAP_DEBUG_TRACE,
+				"ber_get_next on fd %d failed errno=%d (%s)\n",
+			conn->c_sd, err, sock_errstr(err) );
 			ber_free( conn->c_currentber, 1 );
 			conn->c_currentber = NULL;
 
@@ -1580,7 +1538,11 @@ connection_input( Connection *conn )
 		connection_abandon( conn );
 	}
 
-	op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
+	ctx = cri->ctx;
+	op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++, ctx );
+
+	Debug( LDAP_DEBUG_TRACE, "op tag 0x%lx, time %ld\n", tag,
+		(long) op->o_time, 0);
 
 	op->o_conn = conn;
 	/* clear state if the connection is being reused from inactive */
@@ -1670,7 +1632,6 @@ connection_input( Connection *conn )
 	} else {
 		conn->c_n_ops_executing++;
 
-#ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 		/*
 		 * The first op will be processed in the same thread context,
 		 * as long as there is only one op total.
@@ -1689,9 +1650,6 @@ connection_input( Connection *conn )
 			}
 			connection_op_activate( op );
 		}
-#else
-		connection_op_activate( op );
-#endif
 	}
 
 #ifdef NO_THREADS
@@ -1710,18 +1668,18 @@ connection_resched( Connection *conn )
 {
 	Operation *op;
 
-	if( conn->c_conn_state == SLAP_C_CLOSING ) {
-		ber_socket_t	sd;
-		ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
+	if( conn->c_writewaiter )
+		return 0;
 
-		Debug( LDAP_DEBUG_TRACE, "connection_resched: "
+	if( conn->c_conn_state == SLAP_C_CLOSING ) {
+		Debug( LDAP_DEBUG_CONNS, "connection_resched: "
 			"attempting closing conn=%lu sd=%d\n",
-			conn->c_connid, sd, 0 );
+			conn->c_connid, conn->c_sd, 0 );
 		connection_close( conn );
 		return 0;
 	}
 
-	if( conn->c_conn_state != SLAP_C_ACTIVE || conn->c_writewaiter ) {
+	if( conn->c_conn_state != SLAP_C_ACTIVE ) {
 		/* other states need different handling */
 		return 0;
 	}
@@ -1762,13 +1720,15 @@ static int connection_bind_cleanup_cb( Operation *op, SlapReply *rs )
 {
 	op->o_conn->c_sasl_bindop = NULL;
 
+	ch_free( op->o_callback );
+	op->o_callback = NULL;
+
 	return SLAP_CB_CONTINUE;
 }
 
 static int connection_bind_cb( Operation *op, SlapReply *rs )
 {
 	ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
-	op->o_conn->c_conn_state = SLAP_C_ACTIVE;
 	op->o_conn->c_sasl_bind_in_progress =
 		( rs->sr_err == LDAP_SASL_BIND_IN_PROGRESS );
 
@@ -1799,13 +1759,14 @@ static int connection_bind_cb( Operation *op, SlapReply *rs )
 
 			/* log authorization identity */
 			Statslog( LDAP_DEBUG_STATS,
-				"%s BIND dn=\"%s\" mech=%s ssf=%d\n",
+				"%s BIND dn=\"%s\" mech=%s sasl_ssf=%d ssf=%d\n",
 				op->o_log_prefix,
 				BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
-				op->o_conn->c_authmech.bv_val, op->orb_ssf, 0 );
+				op->o_conn->c_authmech.bv_val,
+				op->orb_ssf, op->o_conn->c_ssf );
 
 			Debug( LDAP_DEBUG_TRACE,
-				"do_bind: SASL/%s bind: dn=\"%s\" ssf=%d\n",
+				"do_bind: SASL/%s bind: dn=\"%s\" sasl_ssf=%d\n",
 				op->o_conn->c_authmech.bv_val,
 				BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
 				op->orb_ssf );
@@ -1905,12 +1866,22 @@ int connection_write(ber_socket_t s)
 		return -1;
 	}
 
+#ifdef HAVE_TLS
+	if ( c->c_is_tls && c->c_needs_tls_accept ) {
+		connection_return( c );
+		connection_read_activate( s );
+		return 0;
+	}
+#endif
+
 	c->c_n_write++;
 
 	Debug( LDAP_DEBUG_TRACE,
 		"connection_write(%d): waking output for id=%lu\n",
 		s, c->c_connid, 0 );
-	ldap_pvt_thread_cond_signal( &c->c_write_cv );
+	ldap_pvt_thread_mutex_lock( &c->c_write2_mutex );
+	ldap_pvt_thread_cond_signal( &c->c_write2_cv );
+	ldap_pvt_thread_mutex_unlock( &c->c_write2_mutex );
 
 	if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
 		slapd_set_read( s, 1 );
@@ -1944,36 +1915,113 @@ int connection_write(ber_socket_t s)
 	return 0;
 }
 
+#ifdef LDAP_SLAPI
+typedef struct conn_fake_extblock {
+	void *eb_conn;
+	void *eb_op;
+} conn_fake_extblock;
+
+static void
+connection_fake_destroy(
+	void *key,
+	void *data )
+{
+	Connection conn = {0};
+	Operation op = {0};
+	Opheader ohdr = {0};
+
+	conn_fake_extblock *eb = data;
+	
+	op.o_hdr = &ohdr;
+	op.o_hdr->oh_extensions = eb->eb_op;
+	conn.c_extensions = eb->eb_conn;
+	op.o_conn = &conn;
+	conn.c_connid = -1;
+	op.o_connid = -1;
+
+	ber_memfree_x( eb, NULL );
+	slapi_int_free_object_extensions( SLAPI_X_EXT_OPERATION, &op );
+	slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION, &conn );
+}
+#endif
+
 void
 connection_fake_init(
 	Connection *conn,
-	Operation *op,
+	OperationBuffer *opbuf,
 	void *ctx )
 {
-	conn->c_connid = -1;
-	conn->c_send_ldap_result = slap_send_ldap_result;
-	conn->c_send_search_entry = slap_send_search_entry;
-	conn->c_send_search_reference = slap_send_search_reference;
-	conn->c_listener = (Listener *)&dummy_list;
-	conn->c_peer_domain = slap_empty_bv;
-	conn->c_peer_name = slap_empty_bv;
+	connection_fake_init2( conn, opbuf, ctx, 1 );
+}
 
-	memset(op, 0, OPERATION_BUFFER_SIZE);
-	op->o_hdr = (Opheader *)(op+1);
-	op->o_controls = (void **)(op->o_hdr+1);
+void
+operation_fake_init(
+	Connection *conn,
+	Operation *op,
+	void *ctx,
+	int newmem )
+{
 	/* set memory context */
-	op->o_tmpmemctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx);
+	op->o_tmpmemctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx,
+		newmem );
 	op->o_tmpmfuncs = &slap_sl_mfuncs;
 	op->o_threadctx = ctx;
 	op->o_tid = ldap_pvt_thread_pool_tid( ctx );
 
+	op->o_counters = &slap_counters;
 	op->o_conn = conn;
 	op->o_connid = op->o_conn->c_connid;
 	connection_init_log_prefix( op );
+}
+
+
+void
+connection_fake_init2(
+	Connection *conn,
+	OperationBuffer *opbuf,
+	void *ctx,
+	int newmem )
+{
+	Operation *op = (Operation *) opbuf;
+
+	conn->c_connid = -1;
+	conn->c_conn_idx = -1;
+	conn->c_send_ldap_result = slap_send_ldap_result;
+	conn->c_send_search_entry = slap_send_search_entry;
+	conn->c_send_search_reference = slap_send_search_reference;
+	conn->c_send_ldap_extended = slap_send_ldap_extended;
+	conn->c_send_ldap_intermediate = slap_send_ldap_intermediate;
+	conn->c_listener = (Listener *)&dummy_list;
+	conn->c_peer_domain = slap_empty_bv;
+	conn->c_peer_name = slap_empty_bv;
+
+	memset( opbuf, 0, sizeof( *opbuf ));
+	op->o_hdr = &opbuf->ob_hdr;
+	op->o_controls = opbuf->ob_controls;
+
+	operation_fake_init( conn, op, ctx, newmem );
 
 #ifdef LDAP_SLAPI
-	slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, conn );
-	slapi_int_create_object_extensions( SLAPI_X_EXT_OPERATION, op );
+	if ( slapi_plugins_used ) {
+		conn_fake_extblock *eb;
+		void *ebx = NULL;
+
+		/* Use thread keys to make sure these eventually get cleaned up */
+		if ( ldap_pvt_thread_pool_getkey( ctx, (void *)connection_fake_init,
+				&ebx, NULL )) {
+			eb = ch_malloc( sizeof( *eb ));
+			slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, conn );
+			slapi_int_create_object_extensions( SLAPI_X_EXT_OPERATION, op );
+			eb->eb_conn = conn->c_extensions;
+			eb->eb_op = op->o_hdr->oh_extensions;
+			ldap_pvt_thread_pool_setkey( ctx, (void *)connection_fake_init,
+				eb, connection_fake_destroy, NULL, NULL );
+		} else {
+			eb = ebx;
+			conn->c_extensions = eb->eb_conn;
+			op->o_hdr->oh_extensions = eb->eb_op;
+		}
+	}
 #endif /* LDAP_SLAPI */
 
 	slap_op_time( &op->o_time, &op->o_tincr );