mirror of
https://github.com/torvalds/linux.git
synced 2024-11-12 15:11:50 +00:00
105 lines
2.2 KiB
C
105 lines
2.2 KiB
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;
|
||
|
|
|
||
|
|
br = dev->priv;
|
||
|
|
|
||
|
|
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)
|
||
|
|
{
|
||
|
|
netif_start_queue(dev);
|
||
|
|
|
||
|
|
br_stp_enable_bridge(dev->priv);
|
||
|
|
|
||
|
|
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(dev->priv);
|
||
|
|
|
||
|
|
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(dev->priv))
|
||
|
|
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;
|
||
|
|
}
|