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> |
Bart De Schuymer | ea2d9b4 | 2010-04-15 12:14:51 +0200 | [diff] [blame^] | 18 | #include <linux/netfilter_bridge.h> |
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) */ |
Stephen Hemminger | 6fef4c0 | 2009-08-31 19:50:41 +0000 | [diff] [blame] | 23 | netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | { |
| 25 | struct net_bridge *br = netdev_priv(dev); |
| 26 | const unsigned char *dest = skb->data; |
| 27 | struct net_bridge_fdb_entry *dst; |
Herbert Xu | c4fcb78 | 2010-02-27 19:41:48 +0000 | [diff] [blame] | 28 | struct net_bridge_mdb_entry *mdst; |
stephen hemminger | 14bb478 | 2010-03-02 13:32:09 +0000 | [diff] [blame] | 29 | struct br_cpu_netstats *brstats = this_cpu_ptr(br->stats); |
| 30 | |
Bart De Schuymer | ea2d9b4 | 2010-04-15 12:14:51 +0200 | [diff] [blame^] | 31 | #ifdef CONFIG_BRIDGE_NETFILTER |
| 32 | if (skb->nf_bridge && (skb->nf_bridge->mask & BRNF_BRIDGED_DNAT)) { |
| 33 | br_nf_pre_routing_finish_bridge_slow(skb); |
| 34 | return NETDEV_TX_OK; |
| 35 | } |
| 36 | #endif |
| 37 | |
stephen hemminger | 14bb478 | 2010-03-02 13:32:09 +0000 | [diff] [blame] | 38 | brstats->tx_packets++; |
| 39 | brstats->tx_bytes += skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
Herbert Xu | 6088a53 | 2010-02-27 19:41:42 +0000 | [diff] [blame] | 41 | BR_INPUT_SKB_CB(skb)->brdev = dev; |
| 42 | |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 43 | skb_reset_mac_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | skb_pull(skb, ETH_HLEN); |
| 45 | |
Herbert Xu | c4fcb78 | 2010-02-27 19:41:48 +0000 | [diff] [blame] | 46 | if (dest[0] & 1) { |
| 47 | if (br_multicast_rcv(br, NULL, skb)) |
| 48 | goto out; |
| 49 | |
| 50 | mdst = br_mdb_get(br, skb); |
YOSHIFUJI Hideaki / 吉藤英明 | 32dec5d | 2010-03-15 21:51:18 +0000 | [diff] [blame] | 51 | if (mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) |
Herbert Xu | c4fcb78 | 2010-02-27 19:41:48 +0000 | [diff] [blame] | 52 | br_multicast_deliver(mdst, skb); |
| 53 | else |
| 54 | br_flood_deliver(br, skb); |
| 55 | } else if ((dst = __br_fdb_get(br, dest)) != NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | br_deliver(dst->dst, skb); |
| 57 | else |
Herbert Xu | e081e1e | 2007-09-16 16:20:48 -0700 | [diff] [blame] | 58 | br_flood_deliver(br, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
Herbert Xu | c4fcb78 | 2010-02-27 19:41:48 +0000 | [diff] [blame] | 60 | out: |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 61 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | } |
| 63 | |
| 64 | static int br_dev_open(struct net_device *dev) |
| 65 | { |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 66 | struct net_bridge *br = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 68 | br_features_recompute(br); |
| 69 | netif_start_queue(dev); |
| 70 | br_stp_enable_bridge(br); |
Herbert Xu | 3fe2d7c | 2010-02-28 00:49:38 -0800 | [diff] [blame] | 71 | br_multicast_open(br); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
| 73 | return 0; |
| 74 | } |
| 75 | |
| 76 | static void br_dev_set_multicast_list(struct net_device *dev) |
| 77 | { |
| 78 | } |
| 79 | |
| 80 | static int br_dev_stop(struct net_device *dev) |
| 81 | { |
Herbert Xu | 3fe2d7c | 2010-02-28 00:49:38 -0800 | [diff] [blame] | 82 | struct net_bridge *br = netdev_priv(dev); |
| 83 | |
| 84 | br_stp_disable_bridge(br); |
| 85 | br_multicast_stop(br); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | |
| 87 | netif_stop_queue(dev); |
| 88 | |
| 89 | return 0; |
| 90 | } |
| 91 | |
stephen hemminger | 14bb478 | 2010-03-02 13:32:09 +0000 | [diff] [blame] | 92 | static struct net_device_stats *br_get_stats(struct net_device *dev) |
| 93 | { |
| 94 | struct net_bridge *br = netdev_priv(dev); |
| 95 | struct net_device_stats *stats = &dev->stats; |
| 96 | struct br_cpu_netstats sum = { 0 }; |
| 97 | unsigned int cpu; |
| 98 | |
| 99 | for_each_possible_cpu(cpu) { |
| 100 | const struct br_cpu_netstats *bstats |
| 101 | = per_cpu_ptr(br->stats, cpu); |
| 102 | |
| 103 | sum.tx_bytes += bstats->tx_bytes; |
| 104 | sum.tx_packets += bstats->tx_packets; |
| 105 | sum.rx_bytes += bstats->rx_bytes; |
| 106 | sum.rx_packets += bstats->rx_packets; |
| 107 | } |
| 108 | |
| 109 | stats->tx_bytes = sum.tx_bytes; |
| 110 | stats->tx_packets = sum.tx_packets; |
| 111 | stats->rx_bytes = sum.rx_bytes; |
| 112 | stats->rx_packets = sum.rx_packets; |
| 113 | |
| 114 | return stats; |
| 115 | } |
| 116 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | static int br_change_mtu(struct net_device *dev, int new_mtu) |
| 118 | { |
Simon Wunderlich | 4adf0af | 2008-07-30 16:27:55 -0700 | [diff] [blame] | 119 | struct net_bridge *br = netdev_priv(dev); |
| 120 | if (new_mtu < 68 || new_mtu > br_min_mtu(br)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | return -EINVAL; |
| 122 | |
| 123 | dev->mtu = new_mtu; |
Simon Wunderlich | 4adf0af | 2008-07-30 16:27:55 -0700 | [diff] [blame] | 124 | |
| 125 | #ifdef CONFIG_BRIDGE_NETFILTER |
| 126 | /* remember the MTU in the rtable for PMTU */ |
| 127 | br->fake_rtable.u.dst.metrics[RTAX_MTU - 1] = new_mtu; |
| 128 | #endif |
| 129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | return 0; |
| 131 | } |
| 132 | |
Stephen Hemminger | ffe1d49 | 2007-04-09 11:49:58 -0700 | [diff] [blame] | 133 | /* Allow setting mac address to any valid ethernet address. */ |
Stephen Hemminger | 4505a3e | 2005-12-21 18:51:49 -0800 | [diff] [blame] | 134 | static int br_set_mac_address(struct net_device *dev, void *p) |
| 135 | { |
| 136 | struct net_bridge *br = netdev_priv(dev); |
| 137 | struct sockaddr *addr = p; |
Stephen Hemminger | ffe1d49 | 2007-04-09 11:49:58 -0700 | [diff] [blame] | 138 | |
| 139 | if (!is_valid_ether_addr(addr->sa_data)) |
| 140 | return -EINVAL; |
Stephen Hemminger | 4505a3e | 2005-12-21 18:51:49 -0800 | [diff] [blame] | 141 | |
| 142 | spin_lock_bh(&br->lock); |
Stephen Hemminger | ffe1d49 | 2007-04-09 11:49:58 -0700 | [diff] [blame] | 143 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); |
| 144 | br_stp_change_bridge_id(br, addr->sa_data); |
Stephen Hemminger | 92c0574 | 2008-06-17 16:10:06 -0700 | [diff] [blame] | 145 | br->flags |= BR_SET_MAC_ADDR; |
Stephen Hemminger | 4505a3e | 2005-12-21 18:51:49 -0800 | [diff] [blame] | 146 | spin_unlock_bh(&br->lock); |
| 147 | |
Stephen Hemminger | ffe1d49 | 2007-04-09 11:49:58 -0700 | [diff] [blame] | 148 | return 0; |
Stephen Hemminger | 4505a3e | 2005-12-21 18:51:49 -0800 | [diff] [blame] | 149 | } |
| 150 | |
Stephen Hemminger | edb5e46 | 2005-12-21 19:00:58 -0800 | [diff] [blame] | 151 | static void br_getinfo(struct net_device *dev, struct ethtool_drvinfo *info) |
| 152 | { |
| 153 | strcpy(info->driver, "bridge"); |
| 154 | strcpy(info->version, BR_VERSION); |
| 155 | strcpy(info->fw_version, "N/A"); |
| 156 | strcpy(info->bus_info, "N/A"); |
| 157 | } |
| 158 | |
| 159 | static int br_set_sg(struct net_device *dev, u32 data) |
| 160 | { |
| 161 | struct net_bridge *br = netdev_priv(dev); |
| 162 | |
| 163 | if (data) |
| 164 | br->feature_mask |= NETIF_F_SG; |
| 165 | else |
| 166 | br->feature_mask &= ~NETIF_F_SG; |
| 167 | |
| 168 | br_features_recompute(br); |
| 169 | return 0; |
| 170 | } |
| 171 | |
| 172 | static int br_set_tso(struct net_device *dev, u32 data) |
| 173 | { |
| 174 | struct net_bridge *br = netdev_priv(dev); |
| 175 | |
| 176 | if (data) |
| 177 | br->feature_mask |= NETIF_F_TSO; |
| 178 | else |
| 179 | br->feature_mask &= ~NETIF_F_TSO; |
| 180 | |
| 181 | br_features_recompute(br); |
| 182 | return 0; |
| 183 | } |
| 184 | |
| 185 | static int br_set_tx_csum(struct net_device *dev, u32 data) |
| 186 | { |
| 187 | struct net_bridge *br = netdev_priv(dev); |
| 188 | |
| 189 | if (data) |
Herbert Xu | 2c6cc0d | 2006-06-17 22:06:45 -0700 | [diff] [blame] | 190 | br->feature_mask |= NETIF_F_NO_CSUM; |
Stephen Hemminger | edb5e46 | 2005-12-21 19:00:58 -0800 | [diff] [blame] | 191 | else |
Herbert Xu | 2c6cc0d | 2006-06-17 22:06:45 -0700 | [diff] [blame] | 192 | br->feature_mask &= ~NETIF_F_ALL_CSUM; |
Stephen Hemminger | edb5e46 | 2005-12-21 19:00:58 -0800 | [diff] [blame] | 193 | |
| 194 | br_features_recompute(br); |
| 195 | return 0; |
| 196 | } |
| 197 | |
Stephen Hemminger | a2dbb88 | 2008-11-19 21:49:00 -0800 | [diff] [blame] | 198 | static const struct ethtool_ops br_ethtool_ops = { |
Stephen Hemminger | e4119a4 | 2008-08-15 19:51:07 -0700 | [diff] [blame] | 199 | .get_drvinfo = br_getinfo, |
| 200 | .get_link = ethtool_op_get_link, |
| 201 | .get_tx_csum = ethtool_op_get_tx_csum, |
| 202 | .set_tx_csum = br_set_tx_csum, |
| 203 | .get_sg = ethtool_op_get_sg, |
| 204 | .set_sg = br_set_sg, |
| 205 | .get_tso = ethtool_op_get_tso, |
| 206 | .set_tso = br_set_tso, |
| 207 | .get_ufo = ethtool_op_get_ufo, |
Sridhar Samudrala | 72dad21 | 2009-10-07 12:41:17 +0000 | [diff] [blame] | 208 | .set_ufo = ethtool_op_set_ufo, |
Stephen Hemminger | e4119a4 | 2008-08-15 19:51:07 -0700 | [diff] [blame] | 209 | .get_flags = ethtool_op_get_flags, |
Stephen Hemminger | edb5e46 | 2005-12-21 19:00:58 -0800 | [diff] [blame] | 210 | }; |
| 211 | |
Stephen Hemminger | a2dbb88 | 2008-11-19 21:49:00 -0800 | [diff] [blame] | 212 | static const struct net_device_ops br_netdev_ops = { |
| 213 | .ndo_open = br_dev_open, |
| 214 | .ndo_stop = br_dev_stop, |
Stephen Hemminger | 0082982 | 2008-11-20 20:14:53 -0800 | [diff] [blame] | 215 | .ndo_start_xmit = br_dev_xmit, |
stephen hemminger | 14bb478 | 2010-03-02 13:32:09 +0000 | [diff] [blame] | 216 | .ndo_get_stats = br_get_stats, |
Stephen Hemminger | 0082982 | 2008-11-20 20:14:53 -0800 | [diff] [blame] | 217 | .ndo_set_mac_address = br_set_mac_address, |
| 218 | .ndo_set_multicast_list = br_dev_set_multicast_list, |
| 219 | .ndo_change_mtu = br_change_mtu, |
| 220 | .ndo_do_ioctl = br_dev_ioctl, |
Stephen Hemminger | a2dbb88 | 2008-11-19 21:49:00 -0800 | [diff] [blame] | 221 | }; |
| 222 | |
stephen hemminger | 14bb478 | 2010-03-02 13:32:09 +0000 | [diff] [blame] | 223 | static void br_dev_free(struct net_device *dev) |
| 224 | { |
| 225 | struct net_bridge *br = netdev_priv(dev); |
| 226 | |
| 227 | free_percpu(br->stats); |
| 228 | free_netdev(dev); |
| 229 | } |
| 230 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | void br_dev_setup(struct net_device *dev) |
| 232 | { |
Stephen Hemminger | 3ae4125 | 2007-12-16 13:35:51 -0800 | [diff] [blame] | 233 | random_ether_addr(dev->dev_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | ether_setup(dev); |
| 235 | |
Stephen Hemminger | a2dbb88 | 2008-11-19 21:49:00 -0800 | [diff] [blame] | 236 | dev->netdev_ops = &br_netdev_ops; |
stephen hemminger | 14bb478 | 2010-03-02 13:32:09 +0000 | [diff] [blame] | 237 | dev->destructor = br_dev_free; |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 238 | SET_ETHTOOL_OPS(dev, &br_ethtool_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | dev->tx_queue_len = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | dev->priv_flags = IFF_EBRIDGE; |
Stephen Hemminger | edb5e46 | 2005-12-21 19:00:58 -0800 | [diff] [blame] | 241 | |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 242 | dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA | |
Alexey Dobriyan | 4aa678b | 2008-09-08 16:19:58 -0700 | [diff] [blame] | 243 | NETIF_F_GSO_MASK | NETIF_F_NO_CSUM | NETIF_F_LLTX | |
Herbert Xu | b63365a | 2008-10-23 01:11:29 -0700 | [diff] [blame] | 244 | NETIF_F_NETNS_LOCAL | NETIF_F_GSO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | } |