97 lines
2.2 KiB
C
97 lines
2.2 KiB
C
/*
|
|
* Device event handling
|
|
* Linux ethernet bridge
|
|
*
|
|
* Authors:
|
|
* Lennert Buytenhek <buytenh@gnu.org>
|
|
*
|
|
* 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/rtnetlink.h>
|
|
#include <net/net_namespace.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 = {
|
|
.notifier_call = br_device_event
|
|
};
|
|
|
|
/*
|
|
* Handle changes in state of network devices enslaved to a bridge.
|
|
*
|
|
* Note: don't care about up/down if bridge itself is down, because
|
|
* port state is checked when bridge is brought up.
|
|
*/
|
|
static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
|
|
{
|
|
struct net_device *dev = ptr;
|
|
struct net_bridge_port *p = dev->br_port;
|
|
struct net_bridge *br;
|
|
|
|
if (!net_eq(dev_net(dev), &init_net))
|
|
return NOTIFY_DONE;
|
|
|
|
/* not a port of a bridge */
|
|
if (p == NULL)
|
|
return NOTIFY_DONE;
|
|
|
|
br = p->br;
|
|
|
|
switch (event) {
|
|
case NETDEV_CHANGEMTU:
|
|
dev_set_mtu(br->dev, br_min_mtu(br));
|
|
break;
|
|
|
|
case NETDEV_CHANGEADDR:
|
|
spin_lock_bh(&br->lock);
|
|
br_fdb_changeaddr(p, dev->dev_addr);
|
|
br_stp_recalculate_bridge_id(br);
|
|
spin_unlock_bh(&br->lock);
|
|
break;
|
|
|
|
case NETDEV_CHANGE:
|
|
br_port_carrier_check(p);
|
|
break;
|
|
|
|
case NETDEV_FEAT_CHANGE:
|
|
spin_lock_bh(&br->lock);
|
|
if (netif_running(br->dev))
|
|
br_features_recompute(br);
|
|
spin_unlock_bh(&br->lock);
|
|
break;
|
|
|
|
case NETDEV_DOWN:
|
|
spin_lock_bh(&br->lock);
|
|
if (br->dev->flags & IFF_UP)
|
|
br_stp_disable_port(p);
|
|
spin_unlock_bh(&br->lock);
|
|
break;
|
|
|
|
case NETDEV_UP:
|
|
if (netif_carrier_ok(dev) && (br->dev->flags & IFF_UP)) {
|
|
spin_lock_bh(&br->lock);
|
|
br_stp_enable_port(p);
|
|
spin_unlock_bh(&br->lock);
|
|
}
|
|
break;
|
|
|
|
case NETDEV_UNREGISTER:
|
|
br_del_if(br, dev);
|
|
break;
|
|
}
|
|
|
|
/* Events that may cause spanning tree to refresh */
|
|
if (event == NETDEV_CHANGEADDR || event == NETDEV_UP ||
|
|
event == NETDEV_CHANGE || event == NETDEV_DOWN)
|
|
br_ifinfo_notify(RTM_NEWLINK, p);
|
|
|
|
return NOTIFY_DONE;
|
|
}
|