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/*

 *      Device event handling

 *      Linux ethernet bridge

 *

 *      Authors:

 *      Lennert Buytenhek               <buytenh@gnu.org>

 *

 *      $Id: br_notify.c,v 1.1.1.1 2004-04-15 01:16:27 phoenix 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,

};

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;

}