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inet: Don't lookup the socket if there's a socket attached to the skb

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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>
This commit is contained in:
KOVACS Krisztian
2008-10-07 12:41:01 -07:00
committed by David S. Miller
parent 607c4aaf03
commit 23542618de
5 changed files with 41 additions and 13 deletions
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10
net/ipv4/udp.c
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@@ -306,11 +306,15 @@ static inline struct sock *__udp4_lib_lookup_skb(struct sk_buff *skb,
__be16 sport, __be16 dport,
struct hlist_head udptable[])
{
struct sock *sk;
const struct iphdr *iph = ip_hdr(skb);
return __udp4_lib_lookup(dev_net(skb->dst->dev), iph->saddr, sport,
iph->daddr, dport, inet_iif(skb),
udptable);
if (unlikely(sk = skb_steal_sock(skb)))
return sk;
else
return __udp4_lib_lookup(dev_net(skb->dst->dev), iph->saddr, sport,
iph->daddr, dport, inet_iif(skb),
udptable);
}
struct sock *udp4_lib_lookup(struct net *net, __be32 saddr, __be16 sport,