1 files changed, 35 insertions, 17 deletions

diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
index 5ee1a3682bf2..d36e700f7a26 100644
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -11,6 +11,7 @@
  *	2 of the License, or (at your option) any later version.
  */
 
+#include <linux/slab.h>
 #include <linux/kernel.h>
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
@@ -20,18 +21,20 @@
 /* Bridge group multicast address 802.1d (pg 51). */
 const u8 br_group_address[ETH_ALEN] = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x00 };
 
-static void br_pass_frame_up(struct net_bridge *br, struct sk_buff *skb)
+static int br_pass_frame_up(struct sk_buff *skb)
 {
-	struct net_device *indev, *brdev = br->dev;
+	struct net_device *indev, *brdev = BR_INPUT_SKB_CB(skb)->brdev;
+	struct net_bridge *br = netdev_priv(brdev);
+	struct br_cpu_netstats *brstats = this_cpu_ptr(br->stats);
 
-	brdev->stats.rx_packets++;
-	brdev->stats.rx_bytes += skb->len;
+	brstats->rx_packets++;
+	brstats->rx_bytes += skb->len;
 
 	indev = skb->dev;
 	skb->dev = brdev;
 
-	NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_IN, skb, indev, NULL,
-		netif_receive_skb);
+	return NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_IN, skb, indev, NULL,
+		       netif_receive_skb);
 }
 
 /* note: already called with rcu_read_lock (preempt_disabled) */
@@ -41,6 +44,7 @@ int br_handle_frame_finish(struct sk_buff *skb)
 	struct net_bridge_port *p = rcu_dereference(skb->dev->br_port);
 	struct net_bridge *br;
 	struct net_bridge_fdb_entry *dst;
+	struct net_bridge_mdb_entry *mdst;
 	struct sk_buff *skb2;
 
 	if (!p || p->state == BR_STATE_DISABLED)
@@ -50,9 +54,15 @@ int br_handle_frame_finish(struct sk_buff *skb)
 	br = p->br;
 	br_fdb_update(br, p, eth_hdr(skb)->h_source);
 
+	if (is_multicast_ether_addr(dest) &&
+	    br_multicast_rcv(br, p, skb))
+		goto drop;
+
 	if (p->state == BR_STATE_LEARNING)
 		goto drop;
 
+	BR_INPUT_SKB_CB(skb)->brdev = br->dev;
+
 	/* The packet skb2 goes to the local host (NULL to skip). */
 	skb2 = NULL;
 
@@ -62,27 +72,35 @@ int br_handle_frame_finish(struct sk_buff *skb)
 	dst = NULL;
 
 	if (is_multicast_ether_addr(dest)) {
+		mdst = br_mdb_get(br, skb);
+		if (mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) {
+			if ((mdst && !hlist_unhashed(&mdst->mglist)) ||
+			    br_multicast_is_router(br))
+				skb2 = skb;
+			br_multicast_forward(mdst, skb, skb2);
+			skb = NULL;
+			if (!skb2)
+				goto out;
+		} else
+			skb2 = skb;
+
 		br->dev->stats.multicast++;
-		skb2 = skb;
 	} else if ((dst = __br_fdb_get(br, dest)) && dst->is_local) {
 		skb2 = skb;
 		/* Do not forward the packet since it's local. */
 		skb = NULL;
 	}
 
-	if (skb2 == skb)
-		skb2 = skb_clone(skb, GFP_ATOMIC);
-
-	if (skb2)
-		br_pass_frame_up(br, skb2);
-
 	if (skb) {
 		if (dst)
-			br_forward(dst->dst, skb);
+			br_forward(dst->dst, skb, skb2);
 		else
-			br_flood_forward(br, skb);
+			br_flood_forward(br, skb, skb2);
 	}
 
+	if (skb2)
+		return br_pass_frame_up(skb2);
+
 out:
 	return 0;
 drop:
@@ -138,7 +156,7 @@ struct sk_buff *br_handle_frame(struct net_bridge_port *p, struct sk_buff *skb)
 		if (p->br->stp_enabled == BR_NO_STP && dest[5] == 0)
 			goto forward;
 
-		if (NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_IN, skb, skb->dev,
+		if (NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_IN, skb, skb->dev,
 			    NULL, br_handle_local_finish))
 			return NULL;	/* frame consumed by filter */
 		else
@@ -159,7 +177,7 @@ forward:
 		if (!compare_ether_addr(p->br->dev->dev_addr, dest))
 			skb->pkt_type = PACKET_HOST;
 
-		NF_HOOK(PF_BRIDGE, NF_BR_PRE_ROUTING, skb, skb->dev, NULL,
+		NF_HOOK(NFPROTO_BRIDGE, NF_BR_PRE_ROUTING, skb, skb->dev, NULL,
 			br_handle_frame_finish);
 		break;
 	default: