[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / bridge / br_notify.c

/*
 *	Device event handling
 *	Linux ethernet bridge
 *
 *	Authors:
 *	Lennert Buytenhek		<buytenh@gnu.org>
 *
 *	$Id: br_notify.c,v 1.2 2000/02/21 15:51:34 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 "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;

	/* not a port of a bridge */
	if (p == NULL)
		return NOTIFY_DONE;

	br = p->br;

	spin_lock_bh(&br->lock);
	switch (event) {
	case NETDEV_CHANGEMTU:
		dev_set_mtu(br->dev, br_min_mtu(br));
		break;

	case NETDEV_CHANGEADDR:
		br_fdb_changeaddr(p, dev->dev_addr);
		br_stp_recalculate_bridge_id(br);
		break;

	case NETDEV_CHANGE:
		if (br->dev->flags & IFF_UP)
			schedule_delayed_work(&p->carrier_check, BR_PORT_DEBOUNCE);
		break;

	case NETDEV_FEAT_CHANGE:
		if (br->dev->flags & IFF_UP) 
			br_features_recompute(br);

		/* could do recursive feature change notification
		 * but who would care?? 
		 */
		break;

	case NETDEV_DOWN:
		if (br->dev->flags & IFF_UP)
			br_stp_disable_port(p);
		break;

	case NETDEV_UP:
		if (netif_carrier_ok(dev) && (br->dev->flags & IFF_UP)) 
			br_stp_enable_port(p);
		break;

	case NETDEV_UNREGISTER:
		spin_unlock_bh(&br->lock);
		br_del_if(br, dev);
		goto done;
	} 
	spin_unlock_bh(&br->lock);

 done:
	return NOTIFY_DONE;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Device event handling
	3	* Linux ethernet bridge
	4	*
	5	* Authors:
	6	* Lennert Buytenhek <buytenh@gnu.org>
	7	*
	8	* $Id: br_notify.c,v 1.2 2000/02/21 15:51:34 davem Exp $
	9	*
	10	* This program is free software; you can redistribute it and/or
	11	* modify it under the terms of the GNU General Public License
	12	* as published by the Free Software Foundation; either version
	13	* 2 of the License, or (at your option) any later version.
	14	*/
	15
	16	#include <linux/kernel.h>
	17
	18	#include "br_private.h"
	19
	20	static int br_device_event(struct notifier_block unused, unsigned long event, void ptr);
	21
	22	struct notifier_block br_device_notifier = {
	23	.notifier_call = br_device_event
	24	};
	25
	26	/*
	27	* Handle changes in state of network devices enslaved to a bridge.
	28	*
	29	* Note: don't care about up/down if bridge itself is down, because
	30	* port state is checked when bridge is brought up.
	31	*/
	32	static int br_device_event(struct notifier_block unused, unsigned long event, void ptr)
	33	{
	34	struct net_device *dev = ptr;
	35	struct net_bridge_port *p = dev->br_port;
	36	struct net_bridge *br;
	37
	38	/* not a port of a bridge */
	39	if (p == NULL)
	40	return NOTIFY_DONE;
	41
	42	br = p->br;
	43
	44	spin_lock_bh(&br->lock);
	45	switch (event) {
	46	case NETDEV_CHANGEMTU:
	47	dev_set_mtu(br->dev, br_min_mtu(br));
	48	break;
	49
	50	case NETDEV_CHANGEADDR:
	51	br_fdb_changeaddr(p, dev->dev_addr);
	52	br_stp_recalculate_bridge_id(br);
	53	break;
	54
4433f420 SH	55	case NETDEV_CHANGE:
	56	if (br->dev->flags & IFF_UP)
	57	schedule_delayed_work(&p->carrier_check, BR_PORT_DEBOUNCE);
1da177e4 LT	58	break;
1da177e4 LT	59
81d35307 SH	60	case NETDEV_FEAT_CHANGE:
	61	if (br->dev->flags & IFF_UP)
	62	br_features_recompute(br);
	63
	64	/* could do recursive feature change notification
	65	* but who would care??
	66	*/
	67	break;
	68
1da177e4 LT	69	case NETDEV_DOWN:
	70	if (br->dev->flags & IFF_UP)
	71	br_stp_disable_port(p);
	72	break;
	73
	74	case NETDEV_UP:
	75	if (netif_carrier_ok(dev) && (br->dev->flags & IFF_UP))
	76	br_stp_enable_port(p);
	77	break;
	78
	79	case NETDEV_UNREGISTER:
	80	spin_unlock_bh(&br->lock);
	81	br_del_if(br, dev);
	82	goto done;
	83	}
	84	spin_unlock_bh(&br->lock);
	85
	86	done:
	87	return NOTIFY_DONE;
	88	}