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 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License |
| 10 | * as published by the Free Software Foundation; either version |
| 11 | * 2 of the License, or (at your option) any later version. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/netdevice.h> |
Stephen Hemminger | 4505a3e | 2005-12-21 18:51:49 -0800 | [diff] [blame] | 16 | #include <linux/etherdevice.h> |
Stephen Hemminger | edb5e46 | 2005-12-21 19:00:58 -0800 | [diff] [blame] | 17 | #include <linux/ethtool.h> |
Stephen Hemminger | 4505a3e | 2005-12-21 18:51:49 -0800 | [diff] [blame] | 18 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <asm/uaccess.h> |
| 20 | #include "br_private.h" |
| 21 | |
Stephen Hemminger | f8ae737 | 2006-03-20 22:58:36 -0800 | [diff] [blame] | 22 | /* net device transmit always called with no BH (preempt_disabled) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | int br_dev_xmit(struct sk_buff *skb, struct net_device *dev) |
| 24 | { |
| 25 | struct net_bridge *br = netdev_priv(dev); |
| 26 | const unsigned char *dest = skb->data; |
| 27 | struct net_bridge_fdb_entry *dst; |
| 28 | |
Pavel Emelyanov | a339f1c | 2008-05-21 14:13:47 -0700 | [diff] [blame] | 29 | dev->stats.tx_packets++; |
| 30 | dev->stats.tx_bytes += skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 32 | skb_reset_mac_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | skb_pull(skb, ETH_HLEN); |
| 34 | |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 35 | if (dest[0] & 1) |
Herbert Xu | e081e1e | 2007-09-16 16:20:48 -0700 | [diff] [blame] | 36 | br_flood_deliver(br, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | else if ((dst = __br_fdb_get(br, dest)) != NULL) |
| 38 | br_deliver(dst->dst, skb); |
| 39 | else |
Herbert Xu | e081e1e | 2007-09-16 16:20:48 -0700 | [diff] [blame] | 40 | br_flood_deliver(br, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | return 0; |
| 43 | } |
| 44 | |
| 45 | static int br_dev_open(struct net_device *dev) |
| 46 | { |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 47 | struct net_bridge *br = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 49 | br_features_recompute(br); |
| 50 | netif_start_queue(dev); |
| 51 | br_stp_enable_bridge(br); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
| 53 | return 0; |
| 54 | } |
| 55 | |
| 56 | static void br_dev_set_multicast_list(struct net_device *dev) |
| 57 | { |
| 58 | } |
| 59 | |
| 60 | static int br_dev_stop(struct net_device *dev) |
| 61 | { |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 62 | br_stp_disable_bridge(netdev_priv(dev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
| 64 | netif_stop_queue(dev); |
| 65 | |
| 66 | return 0; |
| 67 | } |
| 68 | |
| 69 | static int br_change_mtu(struct net_device *dev, int new_mtu) |
| 70 | { |
Simon Wunderlich | 4adf0af | 2008-07-30 16:27:55 -0700 | [diff] [blame] | 71 | struct net_bridge *br = netdev_priv(dev); |
| 72 | if (new_mtu < 68 || new_mtu > br_min_mtu(br)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | return -EINVAL; |
| 74 | |
| 75 | dev->mtu = new_mtu; |
Simon Wunderlich | 4adf0af | 2008-07-30 16:27:55 -0700 | [diff] [blame] | 76 | |
| 77 | #ifdef CONFIG_BRIDGE_NETFILTER |
| 78 | /* remember the MTU in the rtable for PMTU */ |
| 79 | br->fake_rtable.u.dst.metrics[RTAX_MTU - 1] = new_mtu; |
| 80 | #endif |
| 81 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | return 0; |
| 83 | } |
| 84 | |
Stephen Hemminger | ffe1d49 | 2007-04-09 11:49:58 -0700 | [diff] [blame] | 85 | /* Allow setting mac address to any valid ethernet address. */ |
Stephen Hemminger | 4505a3e | 2005-12-21 18:51:49 -0800 | [diff] [blame] | 86 | static int br_set_mac_address(struct net_device *dev, void *p) |
| 87 | { |
| 88 | struct net_bridge *br = netdev_priv(dev); |
| 89 | struct sockaddr *addr = p; |
Stephen Hemminger | ffe1d49 | 2007-04-09 11:49:58 -0700 | [diff] [blame] | 90 | |
| 91 | if (!is_valid_ether_addr(addr->sa_data)) |
| 92 | return -EINVAL; |
Stephen Hemminger | 4505a3e | 2005-12-21 18:51:49 -0800 | [diff] [blame] | 93 | |
| 94 | spin_lock_bh(&br->lock); |
Stephen Hemminger | ffe1d49 | 2007-04-09 11:49:58 -0700 | [diff] [blame] | 95 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); |
| 96 | br_stp_change_bridge_id(br, addr->sa_data); |
Stephen Hemminger | 92c0574 | 2008-06-17 16:10:06 -0700 | [diff] [blame] | 97 | br->flags |= BR_SET_MAC_ADDR; |
Stephen Hemminger | 4505a3e | 2005-12-21 18:51:49 -0800 | [diff] [blame] | 98 | spin_unlock_bh(&br->lock); |
| 99 | |
Stephen Hemminger | ffe1d49 | 2007-04-09 11:49:58 -0700 | [diff] [blame] | 100 | return 0; |
Stephen Hemminger | 4505a3e | 2005-12-21 18:51:49 -0800 | [diff] [blame] | 101 | } |
| 102 | |
Stephen Hemminger | edb5e46 | 2005-12-21 19:00:58 -0800 | [diff] [blame] | 103 | static void br_getinfo(struct net_device *dev, struct ethtool_drvinfo *info) |
| 104 | { |
| 105 | strcpy(info->driver, "bridge"); |
| 106 | strcpy(info->version, BR_VERSION); |
| 107 | strcpy(info->fw_version, "N/A"); |
| 108 | strcpy(info->bus_info, "N/A"); |
| 109 | } |
| 110 | |
| 111 | static int br_set_sg(struct net_device *dev, u32 data) |
| 112 | { |
| 113 | struct net_bridge *br = netdev_priv(dev); |
| 114 | |
| 115 | if (data) |
| 116 | br->feature_mask |= NETIF_F_SG; |
| 117 | else |
| 118 | br->feature_mask &= ~NETIF_F_SG; |
| 119 | |
| 120 | br_features_recompute(br); |
| 121 | return 0; |
| 122 | } |
| 123 | |
| 124 | static int br_set_tso(struct net_device *dev, u32 data) |
| 125 | { |
| 126 | struct net_bridge *br = netdev_priv(dev); |
| 127 | |
| 128 | if (data) |
| 129 | br->feature_mask |= NETIF_F_TSO; |
| 130 | else |
| 131 | br->feature_mask &= ~NETIF_F_TSO; |
| 132 | |
| 133 | br_features_recompute(br); |
| 134 | return 0; |
| 135 | } |
| 136 | |
| 137 | static int br_set_tx_csum(struct net_device *dev, u32 data) |
| 138 | { |
| 139 | struct net_bridge *br = netdev_priv(dev); |
| 140 | |
| 141 | if (data) |
Herbert Xu | 2c6cc0d | 2006-06-17 22:06:45 -0700 | [diff] [blame] | 142 | br->feature_mask |= NETIF_F_NO_CSUM; |
Stephen Hemminger | edb5e46 | 2005-12-21 19:00:58 -0800 | [diff] [blame] | 143 | else |
Herbert Xu | 2c6cc0d | 2006-06-17 22:06:45 -0700 | [diff] [blame] | 144 | br->feature_mask &= ~NETIF_F_ALL_CSUM; |
Stephen Hemminger | edb5e46 | 2005-12-21 19:00:58 -0800 | [diff] [blame] | 145 | |
| 146 | br_features_recompute(br); |
| 147 | return 0; |
| 148 | } |
| 149 | |
Stephen Hemminger | a2dbb88 | 2008-11-19 21:49:00 -0800 | [diff] [blame] | 150 | static const struct ethtool_ops br_ethtool_ops = { |
Stephen Hemminger | e4119a4 | 2008-08-15 19:51:07 -0700 | [diff] [blame] | 151 | .get_drvinfo = br_getinfo, |
| 152 | .get_link = ethtool_op_get_link, |
| 153 | .get_tx_csum = ethtool_op_get_tx_csum, |
| 154 | .set_tx_csum = br_set_tx_csum, |
| 155 | .get_sg = ethtool_op_get_sg, |
| 156 | .set_sg = br_set_sg, |
| 157 | .get_tso = ethtool_op_get_tso, |
| 158 | .set_tso = br_set_tso, |
| 159 | .get_ufo = ethtool_op_get_ufo, |
| 160 | .get_flags = ethtool_op_get_flags, |
Stephen Hemminger | edb5e46 | 2005-12-21 19:00:58 -0800 | [diff] [blame] | 161 | }; |
| 162 | |
Stephen Hemminger | a2dbb88 | 2008-11-19 21:49:00 -0800 | [diff] [blame] | 163 | static const struct net_device_ops br_netdev_ops = { |
| 164 | .ndo_open = br_dev_open, |
| 165 | .ndo_stop = br_dev_stop, |
Stephen Hemminger | 0082982 | 2008-11-20 20:14:53 -0800 | [diff] [blame^] | 166 | .ndo_start_xmit = br_dev_xmit, |
| 167 | .ndo_set_mac_address = br_set_mac_address, |
| 168 | .ndo_set_multicast_list = br_dev_set_multicast_list, |
| 169 | .ndo_change_mtu = br_change_mtu, |
| 170 | .ndo_do_ioctl = br_dev_ioctl, |
Stephen Hemminger | a2dbb88 | 2008-11-19 21:49:00 -0800 | [diff] [blame] | 171 | }; |
| 172 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | void br_dev_setup(struct net_device *dev) |
| 174 | { |
Stephen Hemminger | 3ae4125 | 2007-12-16 13:35:51 -0800 | [diff] [blame] | 175 | random_ether_addr(dev->dev_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | ether_setup(dev); |
| 177 | |
Stephen Hemminger | a2dbb88 | 2008-11-19 21:49:00 -0800 | [diff] [blame] | 178 | dev->netdev_ops = &br_netdev_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | dev->destructor = free_netdev; |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 180 | SET_ETHTOOL_OPS(dev, &br_ethtool_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | dev->tx_queue_len = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | dev->priv_flags = IFF_EBRIDGE; |
Stephen Hemminger | edb5e46 | 2005-12-21 19:00:58 -0800 | [diff] [blame] | 183 | |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 184 | dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA | |
Alexey Dobriyan | 4aa678b | 2008-09-08 16:19:58 -0700 | [diff] [blame] | 185 | NETIF_F_GSO_MASK | NETIF_F_NO_CSUM | NETIF_F_LLTX | |
Herbert Xu | b63365a | 2008-10-23 01:11:29 -0700 | [diff] [blame] | 186 | NETIF_F_NETNS_LOCAL | NETIF_F_GSO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | } |