2005-04-17 06:20:36 +08:00
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/*
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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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2010-05-06 15:48:24 +08:00
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#include <linux/netpoll.h>
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2005-12-22 10:51:49 +08:00
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#include <linux/etherdevice.h>
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2005-12-22 11:00:58 +08:00
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#include <linux/ethtool.h>
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2010-05-06 15:48:24 +08:00
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#include <linux/list.h>
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2010-04-15 18:14:51 +08:00
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#include <linux/netfilter_bridge.h>
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2005-12-22 10:51:49 +08:00
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2005-04-17 06:20:36 +08:00
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#include <asm/uaccess.h>
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#include "br_private.h"
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2010-07-27 16:26:30 +08:00
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/* net device transmit always called with BH disabled */
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2009-09-01 03:50:41 +08:00
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netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
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2005-04-17 06:20:36 +08:00
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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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2010-02-28 03:41:48 +08:00
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struct net_bridge_mdb_entry *mdst;
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2010-03-02 21:32:09 +08:00
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struct br_cpu_netstats *brstats = this_cpu_ptr(br->stats);
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2005-04-17 06:20:36 +08:00
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2010-04-15 18:14:51 +08:00
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#ifdef CONFIG_BRIDGE_NETFILTER
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if (skb->nf_bridge && (skb->nf_bridge->mask & BRNF_BRIDGED_DNAT)) {
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br_nf_pre_routing_finish_bridge_slow(skb);
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return NETDEV_TX_OK;
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}
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#endif
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2010-03-02 21:32:09 +08:00
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brstats->tx_packets++;
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brstats->tx_bytes += skb->len;
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2010-02-28 03:41:42 +08:00
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2010-03-02 21:32:09 +08:00
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BR_INPUT_SKB_CB(skb)->brdev = dev;
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2005-04-17 06:20:36 +08:00
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2007-03-20 06:30:44 +08:00
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skb_reset_mac_header(skb);
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2005-04-17 06:20:36 +08:00
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skb_pull(skb, ETH_HLEN);
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2010-07-27 16:26:30 +08:00
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rcu_read_lock();
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2010-04-27 15:13:06 +08:00
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if (is_multicast_ether_addr(dest)) {
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2010-02-28 03:41:48 +08:00
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if (br_multicast_rcv(br, NULL, skb))
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goto out;
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mdst = br_mdb_get(br, skb);
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2010-03-16 05:51:18 +08:00
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if (mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb))
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2010-02-28 03:41:48 +08:00
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br_multicast_deliver(mdst, skb);
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else
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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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2005-04-17 06:20:36 +08:00
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br_deliver(dst->dst, skb);
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else
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2007-09-17 07:20:48 +08:00
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br_flood_deliver(br, skb);
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2005-04-17 06:20:36 +08:00
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2010-02-28 03:41:48 +08:00
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out:
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2010-07-27 16:26:30 +08:00
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rcu_read_unlock();
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2009-06-23 14:03:08 +08:00
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return NETDEV_TX_OK;
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2005-04-17 06:20:36 +08:00
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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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2005-05-30 05:15:17 +08:00
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struct net_bridge *br = netdev_priv(dev);
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2005-04-17 06:20:36 +08:00
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2005-05-30 05:15:17 +08:00
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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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2010-02-28 16:49:38 +08:00
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br_multicast_open(br);
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2005-04-17 06:20:36 +08:00
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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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2010-02-28 16:49:38 +08:00
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struct net_bridge *br = netdev_priv(dev);
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br_stp_disable_bridge(br);
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br_multicast_stop(br);
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2005-04-17 06:20:36 +08:00
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netif_stop_queue(dev);
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return 0;
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}
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2010-03-02 21:32:09 +08:00
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static struct net_device_stats *br_get_stats(struct net_device *dev)
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{
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struct net_bridge *br = netdev_priv(dev);
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struct net_device_stats *stats = &dev->stats;
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struct br_cpu_netstats sum = { 0 };
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unsigned int cpu;
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for_each_possible_cpu(cpu) {
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const struct br_cpu_netstats *bstats
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= per_cpu_ptr(br->stats, cpu);
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sum.tx_bytes += bstats->tx_bytes;
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sum.tx_packets += bstats->tx_packets;
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sum.rx_bytes += bstats->rx_bytes;
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sum.rx_packets += bstats->rx_packets;
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}
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stats->tx_bytes = sum.tx_bytes;
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stats->tx_packets = sum.tx_packets;
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stats->rx_bytes = sum.rx_bytes;
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stats->rx_packets = sum.rx_packets;
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return stats;
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}
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2005-04-17 06:20:36 +08:00
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static int br_change_mtu(struct net_device *dev, int new_mtu)
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{
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2008-07-31 07:27:55 +08:00
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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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2005-04-17 06:20:36 +08:00
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return -EINVAL;
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dev->mtu = new_mtu;
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2008-07-31 07:27:55 +08:00
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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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2005-04-17 06:20:36 +08:00
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return 0;
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}
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2007-04-10 02:49:58 +08:00
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/* Allow setting mac address to any valid ethernet address. */
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2005-12-22 10:51:49 +08:00
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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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2007-04-10 02:49:58 +08:00
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if (!is_valid_ether_addr(addr->sa_data))
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return -EINVAL;
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2005-12-22 10:51:49 +08:00
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spin_lock_bh(&br->lock);
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2007-04-10 02:49:58 +08:00
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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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2008-06-18 07:10:06 +08:00
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br->flags |= BR_SET_MAC_ADDR;
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2005-12-22 10:51:49 +08:00
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spin_unlock_bh(&br->lock);
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2007-04-10 02:49:58 +08:00
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return 0;
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2005-12-22 10:51:49 +08:00
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}
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2005-12-22 11:00:58 +08:00
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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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2006-06-18 13:06:45 +08:00
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br->feature_mask |= NETIF_F_NO_CSUM;
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2005-12-22 11:00:58 +08:00
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else
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2006-06-18 13:06:45 +08:00
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br->feature_mask &= ~NETIF_F_ALL_CSUM;
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2005-12-22 11:00:58 +08:00
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br_features_recompute(br);
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return 0;
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}
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2010-05-06 15:48:24 +08:00
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#ifdef CONFIG_NET_POLL_CONTROLLER
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2010-05-10 17:31:08 +08:00
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static bool br_devices_support_netpoll(struct net_bridge *br)
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2010-05-06 15:48:24 +08:00
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{
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struct net_bridge_port *p;
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bool ret = true;
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int count = 0;
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unsigned long flags;
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spin_lock_irqsave(&br->lock, flags);
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list_for_each_entry(p, &br->port_list, list) {
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count++;
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if ((p->dev->priv_flags & IFF_DISABLE_NETPOLL) ||
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!p->dev->netdev_ops->ndo_poll_controller)
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ret = false;
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}
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spin_unlock_irqrestore(&br->lock, flags);
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return count != 0 && ret;
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}
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2010-05-10 17:31:08 +08:00
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void br_netpoll_cleanup(struct net_device *dev)
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2010-05-06 15:48:24 +08:00
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{
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2010-05-10 17:31:08 +08:00
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struct net_bridge *br = netdev_priv(dev);
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2010-05-06 15:48:24 +08:00
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struct net_bridge_port *p, *n;
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const struct net_device_ops *ops;
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br->dev->npinfo = NULL;
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list_for_each_entry_safe(p, n, &br->port_list, list) {
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if (p->dev) {
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ops = p->dev->netdev_ops;
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if (ops->ndo_netpoll_cleanup)
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ops->ndo_netpoll_cleanup(p->dev);
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else
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p->dev->npinfo = NULL;
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}
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}
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}
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2010-05-10 17:31:08 +08:00
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void br_netpoll_disable(struct net_bridge *br,
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struct net_device *dev)
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{
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if (br_devices_support_netpoll(br))
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br->dev->priv_flags &= ~IFF_DISABLE_NETPOLL;
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if (dev->netdev_ops->ndo_netpoll_cleanup)
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dev->netdev_ops->ndo_netpoll_cleanup(dev);
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else
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dev->npinfo = NULL;
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}
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2010-05-06 15:48:24 +08:00
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2010-05-10 17:31:08 +08:00
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void br_netpoll_enable(struct net_bridge *br,
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struct net_device *dev)
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2010-05-06 15:48:24 +08:00
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{
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2010-05-10 17:31:08 +08:00
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if (br_devices_support_netpoll(br)) {
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br->dev->priv_flags &= ~IFF_DISABLE_NETPOLL;
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if (br->dev->npinfo)
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dev->npinfo = br->dev->npinfo;
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} else if (!(br->dev->priv_flags & IFF_DISABLE_NETPOLL)) {
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br->dev->priv_flags |= IFF_DISABLE_NETPOLL;
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2010-05-10 17:31:09 +08:00
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br_info(br,"new device %s does not support netpoll (disabling)",
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dev->name);
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2010-05-10 17:31:08 +08:00
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}
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2010-05-06 15:48:24 +08:00
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}
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#endif
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2008-11-20 13:49:00 +08:00
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static const struct ethtool_ops br_ethtool_ops = {
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2008-08-16 10:51:07 +08:00
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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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2009-10-07 20:41:17 +08:00
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.set_ufo = ethtool_op_set_ufo,
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2008-08-16 10:51:07 +08:00
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.get_flags = ethtool_op_get_flags,
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2005-12-22 11:00:58 +08:00
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};
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2008-11-20 13:49:00 +08:00
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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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2008-11-21 12:14:53 +08:00
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.ndo_start_xmit = br_dev_xmit,
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2010-03-02 21:32:09 +08:00
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.ndo_get_stats = br_get_stats,
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2008-11-21 12:14:53 +08:00
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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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2010-05-06 15:48:24 +08:00
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#ifdef CONFIG_NET_POLL_CONTROLLER
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.ndo_netpoll_cleanup = br_netpoll_cleanup,
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#endif
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2008-11-20 13:49:00 +08:00
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};
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2010-03-02 21:32:09 +08:00
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static void br_dev_free(struct net_device *dev)
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{
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struct net_bridge *br = netdev_priv(dev);
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free_percpu(br->stats);
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free_netdev(dev);
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}
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2005-04-17 06:20:36 +08:00
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void br_dev_setup(struct net_device *dev)
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{
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2007-12-17 05:35:51 +08:00
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random_ether_addr(dev->dev_addr);
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2005-04-17 06:20:36 +08:00
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ether_setup(dev);
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|
2008-11-20 13:49:00 +08:00
|
|
|
dev->netdev_ops = &br_netdev_ops;
|
2010-03-02 21:32:09 +08:00
|
|
|
dev->destructor = br_dev_free;
|
2007-02-09 22:24:35 +08:00
|
|
|
SET_ETHTOOL_OPS(dev, &br_ethtool_ops);
|
2005-04-17 06:20:36 +08:00
|
|
|
dev->tx_queue_len = 0;
|
|
|
|
dev->priv_flags = IFF_EBRIDGE;
|
2005-12-22 11:00:58 +08:00
|
|
|
|
2007-02-09 22:24:35 +08:00
|
|
|
dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
|
2008-09-09 07:19:58 +08:00
|
|
|
NETIF_F_GSO_MASK | NETIF_F_NO_CSUM | NETIF_F_LLTX |
|
2008-10-23 16:11:29 +08:00
|
|
|
NETIF_F_NETNS_LOCAL | NETIF_F_GSO;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|