inet: Don't lookup the socket if there's a socket attached to the skb
Use the socket cached in the skb if it's present.
Signed-off-by: KOVACS Krisztian <hidden@sch.bme.hu>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/inet6_hashtables.h b/include/net/inet6_hashtables.h
index 995efbb..f74665d 100644
--- a/include/net/inet6_hashtables.h
+++ b/include/net/inet6_hashtables.h
@@ -96,10 +96,14 @@
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));
+ struct sock *sk;
+
+ if (unlikely(sk = skb_steal_sock(skb)))
+ return sk;
+ else 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,
diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h
index 3522bbc..5cc182f 100644
--- a/include/net/inet_hashtables.h
+++ b/include/net/inet_hashtables.h
@@ -378,11 +378,15 @@
const __be16 sport,
const __be16 dport)
{
+ struct sock *sk;
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));
+ if (unlikely(sk = skb_steal_sock(skb)))
+ return sk;
+ else
+ 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,
diff --git a/include/net/sock.h b/include/net/sock.h
index 75a312d..18f9670 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1324,6 +1324,18 @@
sock_net_set(sk, hold_net(net));
}
+static inline struct sock *skb_steal_sock(struct sk_buff *skb)
+{
+ if (unlikely(skb->sk)) {
+ struct sock *sk = skb->sk;
+
+ skb->destructor = NULL;
+ skb->sk = NULL;
+ return sk;
+ }
+ return NULL;
+}
+
extern void sock_enable_timestamp(struct sock *sk);
extern int sock_get_timestamp(struct sock *, struct timeval __user *);
extern int sock_get_timestampns(struct sock *, struct timespec __user *);