Merge branches 'gemini' and 'misc' into devel

1 files changed, 152 insertions, 8 deletions

diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index 90a9024e5c1..cf09fe591fc 100644
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -13,31 +13,51 @@
 
 #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"
 
-/* net device transmit always called with no BH (preempt_disabled) */
+/* 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);
 
-	BR_INPUT_SKB_CB(skb)->brdev = dev;
+#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
 
-	dev->stats.tx_packets++;
-	dev->stats.tx_bytes += skb->len;
+	u64_stats_update_begin(&brstats->syncp);
+	brstats->tx_packets++;
+	brstats->tx_bytes += skb->len;
+	u64_stats_update_end(&brstats->syncp);
+
+	BR_INPUT_SKB_CB(skb)->brdev = dev;
 
 	skb_reset_mac_header(skb);
 	skb_pull(skb, ETH_HLEN);
 
-	if (dest[0] & 1) {
-		if (br_multicast_rcv(br, NULL, skb))
+	rcu_read_lock();
+	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))
@@ -50,6 +70,7 @@ netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
 		br_flood_deliver(br, skb);
 
 out:
+	rcu_read_unlock();
 	return NETDEV_TX_OK;
 }
 
@@ -81,6 +102,35 @@ static int br_dev_stop(struct net_device *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);
@@ -91,7 +141,7 @@ static int br_change_mtu(struct net_device *dev, int 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;
+	br->fake_rtable.dst.metrics[RTAX_MTU - 1] = new_mtu;
 #endif
 
 	return 0;
@@ -162,6 +212,86 @@ static int br_set_tx_csum(struct net_device *dev, u32 data)
 	return 0;
 }
 
+#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;
+
+	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 const struct ethtool_ops br_ethtool_ops = {
 	.get_drvinfo    = br_getinfo,
 	.get_link	= ethtool_op_get_link,
@@ -180,19 +310,33 @@ static const struct net_device_ops br_netdev_ops = {
 	.ndo_open		 = br_dev_open,
 	.ndo_stop		 = br_dev_stop,
 	.ndo_start_xmit		 = br_dev_xmit,
+	.ndo_get_stats64	 = br_get_stats64,
 	.ndo_set_mac_address	 = br_set_mac_address,
 	.ndo_set_multicast_list	 = 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
 };
 
+static void br_dev_free(struct net_device *dev)
+{
+	struct net_bridge *br = netdev_priv(dev);
+
+	free_percpu(br->stats);
+	free_netdev(dev);
+}
+
 void br_dev_setup(struct net_device *dev)
 {
 	random_ether_addr(dev->dev_addr);
 	ether_setup(dev);
 
 	dev->netdev_ops = &br_netdev_ops;
-	dev->destructor = free_netdev;
+	dev->destructor = br_dev_free;
 	SET_ETHTOOL_OPS(dev, &br_ethtool_ops);
 	dev->tx_queue_len = 0;
 	dev->priv_flags = IFF_EBRIDGE;