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/net/ipv6/udp.c b/net/ipv6/udp.c
index ce26c41..e51da8c 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -111,11 +111,15 @@
__be16 sport, __be16 dport,
struct hlist_head udptable[])
{
+ struct sock *sk;
struct ipv6hdr *iph = ipv6_hdr(skb);
- return __udp6_lib_lookup(dev_net(skb->dst->dev), &iph->saddr, sport,
- &iph->daddr, dport, inet6_iif(skb),
- udptable);
+ if (unlikely(sk = skb_steal_sock(skb)))
+ return sk;
+ else
+ return __udp6_lib_lookup(dev_net(skb->dst->dev), &iph->saddr, sport,
+ &iph->daddr, dport, inet6_iif(skb),
+ udptable);
}
/*