/* * Device handling code * Linux ethernet bridge * * Authors: * Lennert Buytenhek <buytenh@gnu.org> * * $Id: br_device.c,v 1.6 2001/12/24 00:59:55 davem Exp $ * * 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" static struct net_device_stats *br_dev_get_stats(struct net_device *dev) { struct net_bridge *br = netdev_priv(dev); return &br->statistics; } /* 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; br->statistics.tx_packets++; br->statistics.tx_bytes += skb->len; skb_reset_mac_header(skb); skb_pull(skb, ETH_HLEN); if (dest[0] & 1) br_flood_deliver(br, skb, 0); else if ((dst = __br_fdb_get(br, dest)) != NULL) br_deliver(dst->dst, skb); else br_flood_deliver(br, skb, 0); 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) { if (new_mtu < 68 || new_mtu > br_min_mtu(netdev_priv(dev))) return -EINVAL; dev->mtu = new_mtu; return 0; } /* Allow setting mac address of pseudo-bridge to be same as * any of the bound interfaces */ static int br_set_mac_address(struct net_device *dev, void *p) { struct net_bridge *br = netdev_priv(dev); struct sockaddr *addr = p; struct net_bridge_port *port; int err = -EADDRNOTAVAIL; spin_lock_bh(&br->lock); list_for_each_entry(port, &br->port_list, list) { if (!compare_ether_addr(port->dev->dev_addr, addr->sa_data)) { br_stp_change_bridge_id(br, addr->sa_data); err = 0; break; } } spin_unlock_bh(&br->lock); return err; } 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_sg = ethtool_op_get_sg, .set_sg = br_set_sg, .get_tx_csum = ethtool_op_get_tx_csum, .set_tx_csum = br_set_tx_csum, .get_tso = ethtool_op_get_tso, .set_tso = br_set_tso, }; void br_dev_setup(struct net_device *dev) { memset(dev->dev_addr, 0, ETH_ALEN); ether_setup(dev); dev->do_ioctl = br_dev_ioctl; dev->get_stats = br_dev_get_stats; 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_MODULE_OWNER(dev); 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_TSO | NETIF_F_NO_CSUM | NETIF_F_GSO_ROBUST; }