Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Stephen Hemminger | 4505a3e | 2005-12-21 18:51:49 -0800 | [diff] [blame^] | 18 | #include <linux/etherdevice.h> |
| 19 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <asm/uaccess.h> |
| 21 | #include "br_private.h" |
| 22 | |
| 23 | static struct net_device_stats *br_dev_get_stats(struct net_device *dev) |
| 24 | { |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 25 | struct net_bridge *br = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | return &br->statistics; |
| 27 | } |
| 28 | |
| 29 | int br_dev_xmit(struct sk_buff *skb, struct net_device *dev) |
| 30 | { |
| 31 | struct net_bridge *br = netdev_priv(dev); |
| 32 | const unsigned char *dest = skb->data; |
| 33 | struct net_bridge_fdb_entry *dst; |
| 34 | |
| 35 | br->statistics.tx_packets++; |
| 36 | br->statistics.tx_bytes += skb->len; |
| 37 | |
| 38 | skb->mac.raw = skb->data; |
| 39 | skb_pull(skb, ETH_HLEN); |
| 40 | |
| 41 | rcu_read_lock(); |
| 42 | if (dest[0] & 1) |
| 43 | br_flood_deliver(br, skb, 0); |
| 44 | else if ((dst = __br_fdb_get(br, dest)) != NULL) |
| 45 | br_deliver(dst->dst, skb); |
| 46 | else |
| 47 | br_flood_deliver(br, skb, 0); |
| 48 | |
| 49 | rcu_read_unlock(); |
| 50 | return 0; |
| 51 | } |
| 52 | |
| 53 | static int br_dev_open(struct net_device *dev) |
| 54 | { |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 55 | struct net_bridge *br = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 57 | br_features_recompute(br); |
| 58 | netif_start_queue(dev); |
| 59 | br_stp_enable_bridge(br); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
| 61 | return 0; |
| 62 | } |
| 63 | |
| 64 | static void br_dev_set_multicast_list(struct net_device *dev) |
| 65 | { |
| 66 | } |
| 67 | |
| 68 | static int br_dev_stop(struct net_device *dev) |
| 69 | { |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 70 | br_stp_disable_bridge(netdev_priv(dev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
| 72 | netif_stop_queue(dev); |
| 73 | |
| 74 | return 0; |
| 75 | } |
| 76 | |
| 77 | static int br_change_mtu(struct net_device *dev, int new_mtu) |
| 78 | { |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 79 | if (new_mtu < 68 || new_mtu > br_min_mtu(netdev_priv(dev))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | return -EINVAL; |
| 81 | |
| 82 | dev->mtu = new_mtu; |
| 83 | return 0; |
| 84 | } |
| 85 | |
Stephen Hemminger | 4505a3e | 2005-12-21 18:51:49 -0800 | [diff] [blame^] | 86 | /* Allow setting mac address of pseudo-bridge to be same as |
| 87 | * any of the bound interfaces |
| 88 | */ |
| 89 | static int br_set_mac_address(struct net_device *dev, void *p) |
| 90 | { |
| 91 | struct net_bridge *br = netdev_priv(dev); |
| 92 | struct sockaddr *addr = p; |
| 93 | struct net_bridge_port *port; |
| 94 | int err = -EADDRNOTAVAIL; |
| 95 | |
| 96 | spin_lock_bh(&br->lock); |
| 97 | list_for_each_entry(port, &br->port_list, list) { |
| 98 | if (!compare_ether_addr(port->dev->dev_addr, addr->sa_data)) { |
| 99 | br_stp_change_bridge_id(br, addr->sa_data); |
| 100 | err = 0; |
| 101 | break; |
| 102 | } |
| 103 | } |
| 104 | spin_unlock_bh(&br->lock); |
| 105 | |
| 106 | return err; |
| 107 | } |
| 108 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | void br_dev_setup(struct net_device *dev) |
| 110 | { |
| 111 | memset(dev->dev_addr, 0, ETH_ALEN); |
| 112 | |
| 113 | ether_setup(dev); |
| 114 | |
| 115 | dev->do_ioctl = br_dev_ioctl; |
| 116 | dev->get_stats = br_dev_get_stats; |
| 117 | dev->hard_start_xmit = br_dev_xmit; |
| 118 | dev->open = br_dev_open; |
| 119 | dev->set_multicast_list = br_dev_set_multicast_list; |
| 120 | dev->change_mtu = br_change_mtu; |
| 121 | dev->destructor = free_netdev; |
| 122 | SET_MODULE_OWNER(dev); |
| 123 | dev->stop = br_dev_stop; |
| 124 | dev->tx_queue_len = 0; |
Stephen Hemminger | 4505a3e | 2005-12-21 18:51:49 -0800 | [diff] [blame^] | 125 | dev->set_mac_address = br_set_mac_address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | dev->priv_flags = IFF_EBRIDGE; |
| 127 | } |