3 * Linux ethernet bridge
6 * Lennert Buytenhek <buytenh@gnu.org>
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.
14 #include <linux/kernel.h>
15 #include <linux/netdevice.h>
16 #include <linux/etherdevice.h>
17 #include <linux/ethtool.h>
19 #include <asm/uaccess.h>
20 #include "br_private.h"
22 /* net device transmit always called with no BH (preempt_disabled) */
23 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
25 struct net_bridge *br = netdev_priv(dev);
26 const unsigned char *dest = skb->data;
27 struct net_bridge_fdb_entry *dst;
29 BR_INPUT_SKB_CB(skb)->brdev = dev;
31 dev->stats.tx_packets++;
32 dev->stats.tx_bytes += skb->len;
34 skb_reset_mac_header(skb);
35 skb_pull(skb, ETH_HLEN);
38 br_flood_deliver(br, skb);
39 else if ((dst = __br_fdb_get(br, dest)) != NULL)
40 br_deliver(dst->dst, skb);
42 br_flood_deliver(br, skb);
47 static int br_dev_open(struct net_device *dev)
49 struct net_bridge *br = netdev_priv(dev);
51 br_features_recompute(br);
52 netif_start_queue(dev);
53 br_stp_enable_bridge(br);
58 static void br_dev_set_multicast_list(struct net_device *dev)
62 static int br_dev_stop(struct net_device *dev)
64 br_stp_disable_bridge(netdev_priv(dev));
66 netif_stop_queue(dev);
71 static int br_change_mtu(struct net_device *dev, int new_mtu)
73 struct net_bridge *br = netdev_priv(dev);
74 if (new_mtu < 68 || new_mtu > br_min_mtu(br))
79 #ifdef CONFIG_BRIDGE_NETFILTER
80 /* remember the MTU in the rtable for PMTU */
81 br->fake_rtable.u.dst.metrics[RTAX_MTU - 1] = new_mtu;
87 /* Allow setting mac address to any valid ethernet address. */
88 static int br_set_mac_address(struct net_device *dev, void *p)
90 struct net_bridge *br = netdev_priv(dev);
91 struct sockaddr *addr = p;
93 if (!is_valid_ether_addr(addr->sa_data))
96 spin_lock_bh(&br->lock);
97 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
98 br_stp_change_bridge_id(br, addr->sa_data);
99 br->flags |= BR_SET_MAC_ADDR;
100 spin_unlock_bh(&br->lock);
105 static void br_getinfo(struct net_device *dev, struct ethtool_drvinfo *info)
107 strcpy(info->driver, "bridge");
108 strcpy(info->version, BR_VERSION);
109 strcpy(info->fw_version, "N/A");
110 strcpy(info->bus_info, "N/A");
113 static int br_set_sg(struct net_device *dev, u32 data)
115 struct net_bridge *br = netdev_priv(dev);
118 br->feature_mask |= NETIF_F_SG;
120 br->feature_mask &= ~NETIF_F_SG;
122 br_features_recompute(br);
126 static int br_set_tso(struct net_device *dev, u32 data)
128 struct net_bridge *br = netdev_priv(dev);
131 br->feature_mask |= NETIF_F_TSO;
133 br->feature_mask &= ~NETIF_F_TSO;
135 br_features_recompute(br);
139 static int br_set_tx_csum(struct net_device *dev, u32 data)
141 struct net_bridge *br = netdev_priv(dev);
144 br->feature_mask |= NETIF_F_NO_CSUM;
146 br->feature_mask &= ~NETIF_F_ALL_CSUM;
148 br_features_recompute(br);
152 static const struct ethtool_ops br_ethtool_ops = {
153 .get_drvinfo = br_getinfo,
154 .get_link = ethtool_op_get_link,
155 .get_tx_csum = ethtool_op_get_tx_csum,
156 .set_tx_csum = br_set_tx_csum,
157 .get_sg = ethtool_op_get_sg,
159 .get_tso = ethtool_op_get_tso,
160 .set_tso = br_set_tso,
161 .get_ufo = ethtool_op_get_ufo,
162 .set_ufo = ethtool_op_set_ufo,
163 .get_flags = ethtool_op_get_flags,
166 static const struct net_device_ops br_netdev_ops = {
167 .ndo_open = br_dev_open,
168 .ndo_stop = br_dev_stop,
169 .ndo_start_xmit = br_dev_xmit,
170 .ndo_set_mac_address = br_set_mac_address,
171 .ndo_set_multicast_list = br_dev_set_multicast_list,
172 .ndo_change_mtu = br_change_mtu,
173 .ndo_do_ioctl = br_dev_ioctl,
176 void br_dev_setup(struct net_device *dev)
178 random_ether_addr(dev->dev_addr);
181 dev->netdev_ops = &br_netdev_ops;
182 dev->destructor = free_netdev;
183 SET_ETHTOOL_OPS(dev, &br_ethtool_ops);
184 dev->tx_queue_len = 0;
185 dev->priv_flags = IFF_EBRIDGE;
187 dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
188 NETIF_F_GSO_MASK | NETIF_F_NO_CSUM | NETIF_F_LLTX |
189 NETIF_F_NETNS_LOCAL | NETIF_F_GSO;