diff options
Diffstat (limited to 'net/bridge/br_device.c')
| -rw-r--r-- | net/bridge/br_device.c | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c new file mode 100644 index 0000000..6c023f0 --- /dev/null +++ b/net/bridge/br_device.c @@ -0,0 +1,183 @@ +/* + * Device handling code + * Linux ethernet bridge + * + * Authors: + * Lennert Buytenhek <buytenh@gnu.org> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/ethtool.h> + +#include <asm/uaccess.h> +#include "br_private.h" + +/* net device transmit always called with no BH (preempt_disabled) */ +int br_dev_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct net_bridge *br = netdev_priv(dev); + const unsigned char *dest = skb->data; + struct net_bridge_fdb_entry *dst; + + dev->stats.tx_packets++; + dev->stats.tx_bytes += skb->len; + + skb_reset_mac_header(skb); + skb_pull(skb, ETH_HLEN); + + if (dest[0] & 1) + br_flood_deliver(br, skb); + else if ((dst = __br_fdb_get(br, dest)) != NULL) + br_deliver(dst->dst, skb); + else + br_flood_deliver(br, skb); + + return 0; +} + +static int br_dev_open(struct net_device *dev) +{ + struct net_bridge *br = netdev_priv(dev); + + br_features_recompute(br); + netif_start_queue(dev); + br_stp_enable_bridge(br); + + return 0; +} + +static void br_dev_set_multicast_list(struct net_device *dev) +{ +} + +static int br_dev_stop(struct net_device *dev) +{ + br_stp_disable_bridge(netdev_priv(dev)); + + netif_stop_queue(dev); + + return 0; +} + +static int br_change_mtu(struct net_device *dev, int new_mtu) +{ + struct net_bridge *br = netdev_priv(dev); + if (new_mtu < 68 || new_mtu > br_min_mtu(br)) + return -EINVAL; + + dev->mtu = new_mtu; + +#ifdef CONFIG_BRIDGE_NETFILTER + /* remember the MTU in the rtable for PMTU */ + br->fake_rtable.u.dst.metrics[RTAX_MTU - 1] = new_mtu; +#endif + + return 0; +} + +/* Allow setting mac address to any valid ethernet address. */ +static int br_set_mac_address(struct net_device *dev, void *p) +{ + struct net_bridge *br = netdev_priv(dev); + struct sockaddr *addr = p; + + if (!is_valid_ether_addr(addr->sa_data)) + return -EINVAL; + + spin_lock_bh(&br->lock); + memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); + br_stp_change_bridge_id(br, addr->sa_data); + br->flags |= BR_SET_MAC_ADDR; + spin_unlock_bh(&br->lock); + + return 0; +} + +static void br_getinfo(struct net_device *dev, struct ethtool_drvinfo *info) +{ + strcpy(info->driver, "bridge"); + strcpy(info->version, BR_VERSION); + strcpy(info->fw_version, "N/A"); + strcpy(info->bus_info, "N/A"); +} + +static int br_set_sg(struct net_device *dev, u32 data) +{ + struct net_bridge *br = netdev_priv(dev); + + if (data) + br->feature_mask |= NETIF_F_SG; + else + br->feature_mask &= ~NETIF_F_SG; + + br_features_recompute(br); + return 0; +} + +static int br_set_tso(struct net_device *dev, u32 data) +{ + struct net_bridge *br = netdev_priv(dev); + + if (data) + br->feature_mask |= NETIF_F_TSO; + else + br->feature_mask &= ~NETIF_F_TSO; + + br_features_recompute(br); + return 0; +} + +static int br_set_tx_csum(struct net_device *dev, u32 data) +{ + struct net_bridge *br = netdev_priv(dev); + + if (data) + br->feature_mask |= NETIF_F_NO_CSUM; + else + br->feature_mask &= ~NETIF_F_ALL_CSUM; + + br_features_recompute(br); + return 0; +} + +static struct ethtool_ops br_ethtool_ops = { + .get_drvinfo = br_getinfo, + .get_link = ethtool_op_get_link, + .get_tx_csum = ethtool_op_get_tx_csum, + .set_tx_csum = br_set_tx_csum, + .get_sg = ethtool_op_get_sg, + .set_sg = br_set_sg, + .get_tso = ethtool_op_get_tso, + .set_tso = br_set_tso, + .get_ufo = ethtool_op_get_ufo, + .get_flags = ethtool_op_get_flags, +}; + +void br_dev_setup(struct net_device *dev) +{ + random_ether_addr(dev->dev_addr); + ether_setup(dev); + + dev->do_ioctl = br_dev_ioctl; + dev->hard_start_xmit = br_dev_xmit; + dev->open = br_dev_open; + dev->set_multicast_list = br_dev_set_multicast_list; + dev->change_mtu = br_change_mtu; + dev->destructor = free_netdev; + SET_ETHTOOL_OPS(dev, &br_ethtool_ops); + dev->stop = br_dev_stop; + dev->tx_queue_len = 0; + dev->set_mac_address = br_set_mac_address; + dev->priv_flags = IFF_EBRIDGE; + + dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA | + NETIF_F_GSO_MASK | NETIF_F_NO_CSUM | NETIF_F_LLTX | + NETIF_F_NETNS_LOCAL | NETIF_F_GSO; +} |
