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

/*
 *	Device handling code
 *	Linux ethernet bridge
 *
 *	Authors:
 *	Lennert Buytenhek		<buytenh@gnu.org>
 *
 *	$Id: br_device.c,v 1.6 2001/12/24 00:59:55 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/netdevice.h>
#include <linux/module.h>
#include <asm/uaccess.h>
#include "br_private.h"

static struct net_device_stats *br_dev_get_stats(struct net_device *dev)
{
	struct net_bridge *br = netdev_priv(dev);
	return &br->statistics;
}

int br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct net_bridge *br = netdev_priv(dev);
	const unsigned char *dest = skb->data;
	struct net_bridge_fdb_entry *dst;

	br->statistics.tx_packets++;
	br->statistics.tx_bytes += skb->len;

	skb->mac.raw = skb->data;
	skb_pull(skb, ETH_HLEN);

	rcu_read_lock();
	if (dest[0] & 1) 
		br_flood_deliver(br, skb, 0);
	else if ((dst = __br_fdb_get(br, dest)) != NULL)
		br_deliver(dst->dst, skb);
	else
		br_flood_deliver(br, skb, 0);

	rcu_read_unlock();
	return 0;
}

static int br_dev_open(struct net_device *dev)
{
	struct net_bridge *br = netdev_priv(dev);

	br_features_recompute(br);
	netif_start_queue(dev);
	br_stp_enable_bridge(br);

	return 0;
}

static void br_dev_set_multicast_list(struct net_device *dev)
{
}

static int br_dev_stop(struct net_device *dev)
{
	br_stp_disable_bridge(netdev_priv(dev));

	netif_stop_queue(dev);

	return 0;
}

static int br_change_mtu(struct net_device *dev, int new_mtu)
{
	if (new_mtu < 68 || new_mtu > br_min_mtu(netdev_priv(dev)))
		return -EINVAL;

	dev->mtu = new_mtu;
	return 0;
}

void br_dev_setup(struct net_device *dev)
{
	memset(dev->dev_addr, 0, ETH_ALEN);

	ether_setup(dev);

	dev->do_ioctl = br_dev_ioctl;
	dev->get_stats = br_dev_get_stats;
	dev->hard_start_xmit = br_dev_xmit;
	dev->open = br_dev_open;
	dev->set_multicast_list = br_dev_set_multicast_list;
	dev->change_mtu = br_change_mtu;
	dev->destructor = free_netdev;
	SET_MODULE_OWNER(dev);
	dev->stop = br_dev_stop;
	dev->tx_queue_len = 0;
	dev->set_mac_address = NULL;
	dev->priv_flags = IFF_EBRIDGE;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Device handling code
	3	* Linux ethernet bridge
	4	*
	5	* Authors:
	6	* Lennert Buytenhek <buytenh@gnu.org>
	7	*
	8	* $Id: br_device.c,v 1.6 2001/12/24 00:59:55 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	#include <linux/netdevice.h>
	18	#include <linux/module.h>
	19	#include <asm/uaccess.h>
	20	#include "br_private.h"
	21
	22	static struct net_device_stats br_dev_get_stats(struct net_device dev)
	23	{
81d35307	24	struct net_bridge *br = netdev_priv(dev);
1da177e4 LT	25	return &br->statistics;
	26	}
	27
	28	int br_dev_xmit(struct sk_buff skb, struct net_device dev)
	29	{
	30	struct net_bridge *br = netdev_priv(dev);
	31	const unsigned char *dest = skb->data;
	32	struct net_bridge_fdb_entry *dst;
	33
	34	br->statistics.tx_packets++;
	35	br->statistics.tx_bytes += skb->len;
	36
	37	skb->mac.raw = skb->data;
	38	skb_pull(skb, ETH_HLEN);
	39
	40	rcu_read_lock();
	41	if (dest[0] & 1)
	42	br_flood_deliver(br, skb, 0);
	43	else if ((dst = __br_fdb_get(br, dest)) != NULL)
	44	br_deliver(dst->dst, skb);
	45	else
	46	br_flood_deliver(br, skb, 0);
	47
	48	rcu_read_unlock();
	49	return 0;
	50	}
	51
	52	static int br_dev_open(struct net_device *dev)
	53	{
81d35307	54	struct net_bridge *br = netdev_priv(dev);
1da177e4	55
81d35307 SH	56	br_features_recompute(br);
	57	netif_start_queue(dev);
	58	br_stp_enable_bridge(br);
1da177e4 LT	59
	60	return 0;
	61	}
	62
	63	static void br_dev_set_multicast_list(struct net_device *dev)
	64	{
	65	}
	66
	67	static int br_dev_stop(struct net_device *dev)
	68	{
81d35307	69	br_stp_disable_bridge(netdev_priv(dev));
1da177e4 LT	70
	71	netif_stop_queue(dev);
	72
	73	return 0;
	74	}
	75
	76	static int br_change_mtu(struct net_device *dev, int new_mtu)
	77	{
81d35307	78	if (new_mtu < 68 \|\| new_mtu > br_min_mtu(netdev_priv(dev)))
1da177e4 LT	79	return -EINVAL;
	80
	81	dev->mtu = new_mtu;
	82	return 0;
	83	}
	84
	85	void br_dev_setup(struct net_device *dev)
	86	{
	87	memset(dev->dev_addr, 0, ETH_ALEN);
	88
	89	ether_setup(dev);
	90
	91	dev->do_ioctl = br_dev_ioctl;
	92	dev->get_stats = br_dev_get_stats;
	93	dev->hard_start_xmit = br_dev_xmit;
	94	dev->open = br_dev_open;
	95	dev->set_multicast_list = br_dev_set_multicast_list;
	96	dev->change_mtu = br_change_mtu;
	97	dev->destructor = free_netdev;
	98	SET_MODULE_OWNER(dev);
	99	dev->stop = br_dev_stop;
	100	dev->tx_queue_len = 0;
	101	dev->set_mac_address = NULL;
	102	dev->priv_flags = IFF_EBRIDGE;
	103	}