From 9a1f27c48065ce713eb47f2fd475b717e63ef239 Mon Sep 17 00:00:00 2001
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Tue, 7 Oct 2008 11:41:57 -0700
Subject: inet_hashtables: Add inet_lookup_skb helpers

To be able to use the cached socket reference in the skb during input
processing we add a new set of lookup functions that receive the skb on
their argument list.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: KOVACS Krisztian <hidden@sch.bme.hu>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 include/net/inet6_hashtables.h | 11 +++++++++++
 include/net/inet_hashtables.h  | 14 ++++++++++++++
 2 files changed, 25 insertions(+)

(limited to 'include/net')

diff --git a/include/net/inet6_hashtables.h b/include/net/inet6_hashtables.h
index e48989f04c2..995efbb031a 100644
--- a/include/net/inet6_hashtables.h
+++ b/include/net/inet6_hashtables.h
@@ -91,6 +91,17 @@ static inline struct sock *__inet6_lookup(struct net *net,
 	return inet6_lookup_listener(net, hashinfo, daddr, hnum, dif);
 }
 
+static inline struct sock *__inet6_lookup_skb(struct inet_hashinfo *hashinfo,
+					      struct sk_buff *skb,
+					      const __be16 sport,
+					      const __be16 dport)
+{
+	return __inet6_lookup(dev_net(skb->dst->dev), hashinfo,
+			      &ipv6_hdr(skb)->saddr, sport,
+			      &ipv6_hdr(skb)->daddr, ntohs(dport),
+			      inet6_iif(skb));
+}
+
 extern struct sock *inet6_lookup(struct net *net, struct inet_hashinfo *hashinfo,
 				 const struct in6_addr *saddr, const __be16 sport,
 				 const struct in6_addr *daddr, const __be16 dport,
diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h
index bb619d80f2e..3522bbcd546 100644
--- a/include/net/inet_hashtables.h
+++ b/include/net/inet_hashtables.h
@@ -16,6 +16,7 @@
 
 
 #include <linux/interrupt.h>
+#include <linux/ip.h>
 #include <linux/ipv6.h>
 #include <linux/list.h>
 #include <linux/slab.h>
@@ -28,6 +29,7 @@
 #include <net/inet_connection_sock.h>
 #include <net/inet_sock.h>
 #include <net/sock.h>
+#include <net/route.h>
 #include <net/tcp_states.h>
 #include <net/netns/hash.h>
 
@@ -371,6 +373,18 @@ static inline struct sock *inet_lookup(struct net *net,
 	return sk;
 }
 
+static inline struct sock *__inet_lookup_skb(struct inet_hashinfo *hashinfo,
+					     struct sk_buff *skb,
+					     const __be16 sport,
+					     const __be16 dport)
+{
+	const struct iphdr *iph = ip_hdr(skb);
+
+	return __inet_lookup(dev_net(skb->dst->dev), hashinfo,
+			     iph->saddr, sport,
+			     iph->daddr, dport, inet_iif(skb));
+}
+
 extern int __inet_hash_connect(struct inet_timewait_death_row *death_row,
 		struct sock *sk, u32 port_offset,
 		int (*check_established)(struct inet_timewait_death_row *,
-- 
cgit v1.2.3