zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/net/bridge/br_device.c b/ap/os/linux/linux-3.4.x/net/bridge/br_device.c
new file mode 100644
index 0000000..1c2aa3e
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/net/bridge/br_device.c
@@ -0,0 +1,403 @@
+/*
+ * 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/netpoll.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/list.h>
+#include <linux/netfilter_bridge.h>
+
+#include <asm/uaccess.h>
+#include "br_private.h"
+
+//#ifdef CONFIG_TSP_FASTNAT//#if FASTNAT_SUN1
+extern int should_deliver(const struct net_bridge_port *p,
+ const struct sk_buff *skb);
+//#endif
+/* net device transmit always called with BH disabled */
+netdev_tx_t 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;
+ struct net_bridge_mdb_entry *mdst;
+ struct br_cpu_netstats *brstats = this_cpu_ptr(br->stats);
+
+#ifdef CONFIG_BRIDGE_NETFILTER
+ if (skb->nf_bridge && (skb->nf_bridge->mask & BRNF_BRIDGED_DNAT)) {
+ br_nf_pre_routing_finish_bridge_slow(skb);
+ return NETDEV_TX_OK;
+ }
+#endif
+
+ BR_INPUT_SKB_CB(skb)->brdev = dev;
+
+ skb_reset_mac_header(skb);
+ skb_pull(skb, ETH_HLEN);
+
+ u64_stats_update_begin(&brstats->syncp);
+ brstats->tx_packets++;
+ /* Exclude ETH_HLEN from byte stats for consistency with Rx chain */
+ brstats->tx_bytes += skb->len;
+ u64_stats_update_end(&brstats->syncp);
+
+ rcu_read_lock();
+ if (is_broadcast_ether_addr(dest))
+ br_flood_deliver(br, skb);
+ else if (is_multicast_ether_addr(dest)) {
+ if (unlikely(netpoll_tx_running(dev))) {
+ br_flood_deliver(br, skb);
+ goto out;
+ }
+ if (br_multicast_rcv(br, NULL, skb)) {
+ kfree_skb(skb);
+ goto out;
+ }
+
+ mdst = br_mdb_get(br, skb);
+ if (mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb))
+ br_multicast_deliver(mdst, skb);
+ else
+ br_flood_deliver(br, skb);
+ } else if ((dst = __br_fdb_get(br, dest)) != NULL)
+#if 1
+//#ifndef CONFIG_TSP_FASTNAT//#if !FASTNAT_SUN1
+ br_deliver(dst->dst, skb);
+#else
+ {
+ if (should_deliver(dst->dst, skb))
+ {
+ skb->dev = dst->dst->dev;
+ br_dev_queue_push_xmit(skb);
+ }
+ else
+ kfree_skb(skb);
+ }
+#endif
+ else
+ {//add by linxu to EC:×îÖÕÖظ´ÊÍ·Å
+ //if(skb->isExtern)
+ // kfree_skb(skb);
+ //else
+ br_flood_deliver(br, skb);
+ skbinfo_add(NULL,SKB_FLOOD);
+ }
+
+out:
+ rcu_read_unlock();
+ return NETDEV_TX_OK;
+}
+
+static int br_dev_init(struct net_device *dev)
+{
+ struct net_bridge *br = netdev_priv(dev);
+
+ br->stats = alloc_percpu(struct br_cpu_netstats);
+ if (!br->stats)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int br_dev_open(struct net_device *dev)
+{
+ struct net_bridge *br = netdev_priv(dev);
+
+ netdev_update_features(dev);
+ netif_start_queue(dev);
+ br_stp_enable_bridge(br);
+ br_multicast_open(br);
+
+ return 0;
+}
+
+static void br_dev_set_multicast_list(struct net_device *dev)
+{
+}
+
+static int br_dev_stop(struct net_device *dev)
+{
+ struct net_bridge *br = netdev_priv(dev);
+
+ br_stp_disable_bridge(br);
+ br_multicast_stop(br);
+
+ netif_stop_queue(dev);
+
+ return 0;
+}
+
+static struct rtnl_link_stats64 *br_get_stats64(struct net_device *dev,
+ struct rtnl_link_stats64 *stats)
+{
+ struct net_bridge *br = netdev_priv(dev);
+ struct br_cpu_netstats tmp, sum = { 0 };
+ unsigned int cpu;
+
+ for_each_possible_cpu(cpu) {
+ unsigned int start;
+ const struct br_cpu_netstats *bstats
+ = per_cpu_ptr(br->stats, cpu);
+ do {
+ start = u64_stats_fetch_begin(&bstats->syncp);
+ memcpy(&tmp, bstats, sizeof(tmp));
+ } while (u64_stats_fetch_retry(&bstats->syncp, start));
+ sum.tx_bytes += tmp.tx_bytes;
+ sum.tx_packets += tmp.tx_packets;
+ sum.rx_bytes += tmp.rx_bytes;
+ sum.rx_packets += tmp.rx_packets;
+ }
+
+ stats->tx_bytes = sum.tx_bytes;
+ stats->tx_packets = sum.tx_packets;
+ stats->rx_bytes = sum.rx_bytes;
+ stats->rx_packets = sum.rx_packets;
+
+ return stats;
+}
+
+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 */
+ dst_metric_set(&br->fake_rtable.dst, RTAX_MTU, 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 -EADDRNOTAVAIL;
+
+ spin_lock_bh(&br->lock);
+ if (compare_ether_addr(dev->dev_addr, addr->sa_data)) {
+ dev->addr_assign_type &= ~NET_ADDR_RANDOM;
+ memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
+ br_fdb_change_mac_address(br, addr->sa_data);
+ 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 netdev_features_t br_fix_features(struct net_device *dev,
+ netdev_features_t features)
+{
+ struct net_bridge *br = netdev_priv(dev);
+
+ return br_features_recompute(br, features);
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void br_poll_controller(struct net_device *br_dev)
+{
+}
+
+static void br_netpoll_cleanup(struct net_device *dev)
+{
+ struct net_bridge *br = netdev_priv(dev);
+ struct net_bridge_port *p, *n;
+
+ list_for_each_entry_safe(p, n, &br->port_list, list) {
+ br_netpoll_disable(p);
+ }
+}
+
+static int br_netpoll_setup(struct net_device *dev, struct netpoll_info *ni)
+{
+ struct net_bridge *br = netdev_priv(dev);
+ struct net_bridge_port *p, *n;
+ int err = 0;
+
+ list_for_each_entry_safe(p, n, &br->port_list, list) {
+ if (!p->dev)
+ continue;
+
+ err = br_netpoll_enable(p);
+ if (err)
+ goto fail;
+ }
+
+out:
+ return err;
+
+fail:
+ br_netpoll_cleanup(dev);
+ goto out;
+}
+
+int br_netpoll_enable(struct net_bridge_port *p)
+{
+ struct netpoll *np;
+ int err = 0;
+
+ np = kzalloc(sizeof(*p->np), GFP_KERNEL);
+ err = -ENOMEM;
+ if (!np)
+ goto out;
+
+ np->dev = p->dev;
+ strlcpy(np->dev_name, p->dev->name, IFNAMSIZ);
+
+ err = __netpoll_setup(np);
+ if (err) {
+ kfree(np);
+ goto out;
+ }
+
+ p->np = np;
+
+out:
+ return err;
+}
+
+void br_netpoll_disable(struct net_bridge_port *p)
+{
+ struct netpoll *np = p->np;
+
+ if (!np)
+ return;
+
+ p->np = NULL;
+
+ /* Wait for transmitting packets to finish before freeing. */
+ synchronize_rcu_bh();
+
+ __netpoll_cleanup(np);
+ kfree(np);
+}
+
+#endif
+
+static int br_add_slave(struct net_device *dev, struct net_device *slave_dev)
+
+{
+ struct net_bridge *br = netdev_priv(dev);
+
+ return br_add_if(br, slave_dev);
+}
+
+static int br_del_slave(struct net_device *dev, struct net_device *slave_dev)
+{
+ struct net_bridge *br = netdev_priv(dev);
+
+ return br_del_if(br, slave_dev);
+}
+
+static const struct ethtool_ops br_ethtool_ops = {
+ .get_drvinfo = br_getinfo,
+ .get_link = ethtool_op_get_link,
+};
+
+static const struct net_device_ops br_netdev_ops = {
+ .ndo_open = br_dev_open,
+ .ndo_stop = br_dev_stop,
+ .ndo_init = br_dev_init,
+ .ndo_start_xmit = br_dev_xmit,
+ .ndo_get_stats64 = br_get_stats64,
+ .ndo_set_mac_address = br_set_mac_address,
+ .ndo_set_rx_mode = br_dev_set_multicast_list,
+ .ndo_change_mtu = br_change_mtu,
+ .ndo_do_ioctl = br_dev_ioctl,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_netpoll_setup = br_netpoll_setup,
+ .ndo_netpoll_cleanup = br_netpoll_cleanup,
+ .ndo_poll_controller = br_poll_controller,
+#endif
+ .ndo_add_slave = br_add_slave,
+ .ndo_del_slave = br_del_slave,
+ .ndo_fix_features = br_fix_features,
+};
+
+static void br_dev_free(struct net_device *dev)
+{
+ struct net_bridge *br = netdev_priv(dev);
+
+ free_percpu(br->stats);
+ free_netdev(dev);
+}
+
+static struct device_type br_type = {
+ .name = "bridge",
+};
+
+void br_dev_setup(struct net_device *dev)
+{
+ struct net_bridge *br = netdev_priv(dev);
+
+ eth_hw_addr_random(dev);
+ ether_setup(dev);
+
+ dev->netdev_ops = &br_netdev_ops;
+ dev->destructor = br_dev_free;
+ SET_ETHTOOL_OPS(dev, &br_ethtool_ops);
+ SET_NETDEV_DEVTYPE(dev, &br_type);
+ dev->tx_queue_len = 0;
+ dev->priv_flags = IFF_EBRIDGE;
+
+ dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
+ NETIF_F_GSO_MASK | NETIF_F_HW_CSUM | NETIF_F_LLTX |
+ NETIF_F_NETNS_LOCAL | NETIF_F_HW_VLAN_TX;
+ dev->hw_features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
+ NETIF_F_GSO_MASK | NETIF_F_HW_CSUM |
+ NETIF_F_HW_VLAN_TX;
+
+ br->dev = dev;
+ spin_lock_init(&br->lock);
+ INIT_LIST_HEAD(&br->port_list);
+ spin_lock_init(&br->hash_lock);
+
+ br->bridge_id.prio[0] = 0x80;
+ br->bridge_id.prio[1] = 0x00;
+
+ memcpy(br->group_addr, br_group_address, ETH_ALEN);
+
+ br->stp_enabled = BR_NO_STP;
+ br->group_fwd_mask = BR_GROUPFWD_DEFAULT;
+
+ br->designated_root = br->bridge_id;
+ br->bridge_max_age = br->max_age = 20 * HZ;
+ /* edit by shisheng for power saving*/
+ br->bridge_hello_time = br->hello_time = 10 * HZ;
+ /*br->bridge_hello_time = br->hello_time = 2 * HZ;*/
+ br->bridge_forward_delay = br->forward_delay = 15 * HZ;
+ br->ageing_time = 300 * HZ;
+
+ br_netfilter_rtable_init(br);
+ br_stp_timer_init(br);
+ br_multicast_init(br);
+}