1 files changed, 23 insertions, 18 deletions

diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index 26eccc5bab1c..b27d4440f523 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -198,21 +198,19 @@ static int ip_local_deliver_finish(struct sk_buff *skb)
 	rcu_read_lock();
 	{
 		int protocol = ip_hdr(skb)->protocol;
-		int hash, raw;
 		const struct net_protocol *ipprot;
+		int raw;
 
 	resubmit:
 		raw = raw_local_deliver(skb, protocol);
 
-		hash = protocol & (MAX_INET_PROTOS - 1);
-		ipprot = rcu_dereference(inet_protos[hash]);
+		ipprot = rcu_dereference(inet_protos[protocol]);
 		if (ipprot != NULL) {
 			int ret;
 
 			if (!net_eq(net, &init_net) && !ipprot->netns_ok) {
-				if (net_ratelimit())
-					printk("%s: proto %d isn't netns-ready\n",
-						__func__, protocol);
+				net_info_ratelimited("%s: proto %d isn't netns-ready\n",
+						     __func__, protocol);
 				kfree_skb(skb);
 				goto out;
 			}
@@ -298,10 +296,10 @@ static inline bool ip_rcv_options(struct sk_buff *skb)
 
 		if (in_dev) {
 			if (!IN_DEV_SOURCE_ROUTE(in_dev)) {
-				if (IN_DEV_LOG_MARTIANS(in_dev) &&
-				    net_ratelimit())
-					pr_info("source route option %pI4 -> %pI4\n",
-						&iph->saddr, &iph->daddr);
+				if (IN_DEV_LOG_MARTIANS(in_dev))
+					net_info_ratelimited("source route option %pI4 -> %pI4\n",
+							     &iph->saddr,
+							     &iph->daddr);
 				goto drop;
 			}
 		}
@@ -315,26 +313,33 @@ drop:
 	return true;
 }
 
+int sysctl_ip_early_demux __read_mostly = 1;
+
 static int ip_rcv_finish(struct sk_buff *skb)
 {
 	const struct iphdr *iph = ip_hdr(skb);
 	struct rtable *rt;
 
+	if (sysctl_ip_early_demux && !skb_dst(skb)) {
+		const struct net_protocol *ipprot;
+		int protocol = iph->protocol;
+
+		rcu_read_lock();
+		ipprot = rcu_dereference(inet_protos[protocol]);
+		if (ipprot && ipprot->early_demux)
+			ipprot->early_demux(skb);
+		rcu_read_unlock();
+	}
+
 	/*
 	 *	Initialise the virtual path cache for the packet. It describes
 	 *	how the packet travels inside Linux networking.
 	 */
-	if (skb_dst(skb) == NULL) {
+	if (!skb_dst(skb)) {
 		int err = ip_route_input_noref(skb, iph->daddr, iph->saddr,
 					       iph->tos, skb->dev);
 		if (unlikely(err)) {
-			if (err == -EHOSTUNREACH)
-				IP_INC_STATS_BH(dev_net(skb->dev),
-						IPSTATS_MIB_INADDRERRORS);
-			else if (err == -ENETUNREACH)
-				IP_INC_STATS_BH(dev_net(skb->dev),
-						IPSTATS_MIB_INNOROUTES);
-			else if (err == -EXDEV)
+			if (err == -EXDEV)
 				NET_INC_STATS_BH(dev_net(skb->dev),
 						 LINUX_MIB_IPRPFILTER);
 			goto drop;