188 lines
4.2 KiB
C
188 lines
4.2 KiB
C
/*
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* Device handling code
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* Linux ethernet bridge
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*
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* Authors:
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* Lennert Buytenhek <buytenh@gnu.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/ethtool.h>
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#include <asm/uaccess.h>
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#include "br_private.h"
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/* net device transmit always called with no BH (preempt_disabled) */
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netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
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{
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struct net_bridge *br = netdev_priv(dev);
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const unsigned char *dest = skb->data;
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struct net_bridge_fdb_entry *dst;
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dev->stats.tx_packets++;
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dev->stats.tx_bytes += skb->len;
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skb_reset_mac_header(skb);
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skb_pull(skb, ETH_HLEN);
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if (dest[0] & 1)
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br_flood_deliver(br, skb);
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else if ((dst = __br_fdb_get(br, dest)) != NULL)
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br_deliver(dst->dst, skb);
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else
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br_flood_deliver(br, skb);
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return NETDEV_TX_OK;
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}
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static int br_dev_open(struct net_device *dev)
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{
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struct net_bridge *br = netdev_priv(dev);
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br_features_recompute(br);
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netif_start_queue(dev);
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br_stp_enable_bridge(br);
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return 0;
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}
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static void br_dev_set_multicast_list(struct net_device *dev)
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{
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}
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static int br_dev_stop(struct net_device *dev)
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{
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br_stp_disable_bridge(netdev_priv(dev));
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netif_stop_queue(dev);
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return 0;
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}
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static int br_change_mtu(struct net_device *dev, int new_mtu)
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{
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struct net_bridge *br = netdev_priv(dev);
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if (new_mtu < 68 || new_mtu > br_min_mtu(br))
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return -EINVAL;
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dev->mtu = new_mtu;
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#ifdef CONFIG_BRIDGE_NETFILTER
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/* remember the MTU in the rtable for PMTU */
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br->fake_rtable.u.dst.metrics[RTAX_MTU - 1] = new_mtu;
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#endif
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return 0;
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}
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/* Allow setting mac address to any valid ethernet address. */
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static int br_set_mac_address(struct net_device *dev, void *p)
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{
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struct net_bridge *br = netdev_priv(dev);
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struct sockaddr *addr = p;
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if (!is_valid_ether_addr(addr->sa_data))
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return -EINVAL;
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spin_lock_bh(&br->lock);
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memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
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br_stp_change_bridge_id(br, addr->sa_data);
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br->flags |= BR_SET_MAC_ADDR;
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spin_unlock_bh(&br->lock);
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return 0;
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}
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static void br_getinfo(struct net_device *dev, struct ethtool_drvinfo *info)
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{
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strcpy(info->driver, "bridge");
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strcpy(info->version, BR_VERSION);
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strcpy(info->fw_version, "N/A");
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strcpy(info->bus_info, "N/A");
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}
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static int br_set_sg(struct net_device *dev, u32 data)
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{
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struct net_bridge *br = netdev_priv(dev);
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if (data)
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br->feature_mask |= NETIF_F_SG;
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else
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br->feature_mask &= ~NETIF_F_SG;
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br_features_recompute(br);
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return 0;
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}
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static int br_set_tso(struct net_device *dev, u32 data)
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{
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struct net_bridge *br = netdev_priv(dev);
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if (data)
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br->feature_mask |= NETIF_F_TSO;
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else
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br->feature_mask &= ~NETIF_F_TSO;
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br_features_recompute(br);
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return 0;
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}
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static int br_set_tx_csum(struct net_device *dev, u32 data)
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{
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struct net_bridge *br = netdev_priv(dev);
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if (data)
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br->feature_mask |= NETIF_F_NO_CSUM;
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else
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br->feature_mask &= ~NETIF_F_ALL_CSUM;
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br_features_recompute(br);
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return 0;
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}
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static const struct ethtool_ops br_ethtool_ops = {
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.get_drvinfo = br_getinfo,
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.get_link = ethtool_op_get_link,
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.get_tx_csum = ethtool_op_get_tx_csum,
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.set_tx_csum = br_set_tx_csum,
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.get_sg = ethtool_op_get_sg,
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.set_sg = br_set_sg,
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.get_tso = ethtool_op_get_tso,
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.set_tso = br_set_tso,
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.get_ufo = ethtool_op_get_ufo,
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.get_flags = ethtool_op_get_flags,
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};
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static const struct net_device_ops br_netdev_ops = {
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.ndo_open = br_dev_open,
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.ndo_stop = br_dev_stop,
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.ndo_start_xmit = br_dev_xmit,
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.ndo_set_mac_address = br_set_mac_address,
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.ndo_set_multicast_list = br_dev_set_multicast_list,
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.ndo_change_mtu = br_change_mtu,
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.ndo_do_ioctl = br_dev_ioctl,
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};
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void br_dev_setup(struct net_device *dev)
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{
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random_ether_addr(dev->dev_addr);
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ether_setup(dev);
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dev->netdev_ops = &br_netdev_ops;
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dev->destructor = free_netdev;
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SET_ETHTOOL_OPS(dev, &br_ethtool_ops);
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dev->tx_queue_len = 0;
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dev->priv_flags = IFF_EBRIDGE;
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dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
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NETIF_F_GSO_MASK | NETIF_F_NO_CSUM | NETIF_F_LLTX |
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NETIF_F_NETNS_LOCAL | NETIF_F_GSO;
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}
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