patch-2.3.47 linux/net/bridge/br_notify.c

• Lines: 76
• Date: Sun Feb 20 10:41:18 2000
• Orig file: v2.3.46/linux/net/bridge/br_notify.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.46/linux/net/bridge/br_notify.c linux/net/bridge/br_notify.c
@@ -0,0 +1,75 @@
+/*
+ *	Device event handling
+ *	Linux ethernet bridge
+ *
+ *	Authors:
+ *	Lennert Buytenhek		<buytenh@gnu.org>
+ *
+ *	$Id: br_notify.c,v 1.1 2000/02/18 16:47:12 davem Exp $
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/if_bridge.h>
+#include "br_private.h"
+
+static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr);
+
+struct notifier_block br_device_notifier =
+{
+	br_device_event,
+	NULL,
+	0
+};
+
+static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
+{
+	struct net_device *dev;
+	struct net_bridge_port *p;
+
+	dev = ptr;
+	p = dev->br_port;
+
+	if (p == NULL)
+		return NOTIFY_DONE;
+
+	switch (event)
+	{
+	case NETDEV_CHANGEADDR:
+		read_lock(&p->br->lock);
+		br_fdb_changeaddr(p, dev->dev_addr);
+		br_stp_recalculate_bridge_id(p->br);
+		read_unlock(&p->br->lock);
+		break;
+
+	case NETDEV_GOING_DOWN:
+		/* extend the protocol to send some kind of notification? */
+		break;
+
+	case NETDEV_DOWN:
+		if (p->br->dev.flags & IFF_UP) {
+			read_lock(&p->br->lock);
+			br_stp_disable_port(dev->br_port);
+			read_unlock(&p->br->lock);
+		}
+		break;
+
+	case NETDEV_UP:
+		if (p->br->dev.flags & IFF_UP) {
+			read_lock(&p->br->lock);
+			br_stp_enable_port(dev->br_port);
+			read_unlock(&p->br->lock);
+		}
+		break;
+
+	case NETDEV_UNREGISTER:
+		br_del_if(dev->br_port->br, dev);
+		break;
+	}
+
+	return NOTIFY_DONE;
+}