[BRIDGE]: set features based on enslaved devices
[linux-2.6.git] / net / bridge / br_device.c
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 {
24         struct net_bridge *br = netdev_priv(dev);
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 {
54         struct net_bridge *br = netdev_priv(dev);
55
56         br_features_recompute(br);
57         netif_start_queue(dev);
58         br_stp_enable_bridge(br);
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 {
69         br_stp_disable_bridge(netdev_priv(dev));
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 {
78         if (new_mtu < 68 || new_mtu > br_min_mtu(netdev_priv(dev)))
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 }