forked from luck/tmp_suning_uos_patched
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>
This commit is contained in:
parent
607c4aaf03
commit
23542618de
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@ -96,10 +96,14 @@ static inline struct sock *__inet6_lookup_skb(struct inet_hashinfo *hashinfo,
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const __be16 sport,
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const __be16 dport)
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{
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return __inet6_lookup(dev_net(skb->dst->dev), hashinfo,
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&ipv6_hdr(skb)->saddr, sport,
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&ipv6_hdr(skb)->daddr, ntohs(dport),
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inet6_iif(skb));
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struct sock *sk;
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if (unlikely(sk = skb_steal_sock(skb)))
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return sk;
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else return __inet6_lookup(dev_net(skb->dst->dev), hashinfo,
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&ipv6_hdr(skb)->saddr, sport,
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&ipv6_hdr(skb)->daddr, ntohs(dport),
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inet6_iif(skb));
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}
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extern struct sock *inet6_lookup(struct net *net, struct inet_hashinfo *hashinfo,
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@ -378,11 +378,15 @@ static inline struct sock *__inet_lookup_skb(struct inet_hashinfo *hashinfo,
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const __be16 sport,
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const __be16 dport)
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{
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struct sock *sk;
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const struct iphdr *iph = ip_hdr(skb);
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return __inet_lookup(dev_net(skb->dst->dev), hashinfo,
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iph->saddr, sport,
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iph->daddr, dport, inet_iif(skb));
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if (unlikely(sk = skb_steal_sock(skb)))
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return sk;
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else
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return __inet_lookup(dev_net(skb->dst->dev), hashinfo,
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iph->saddr, sport,
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iph->daddr, dport, inet_iif(skb));
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}
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extern int __inet_hash_connect(struct inet_timewait_death_row *death_row,
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@ -1324,6 +1324,18 @@ static inline void sk_change_net(struct sock *sk, struct net *net)
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sock_net_set(sk, hold_net(net));
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}
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static inline struct sock *skb_steal_sock(struct sk_buff *skb)
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{
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if (unlikely(skb->sk)) {
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struct sock *sk = skb->sk;
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skb->destructor = NULL;
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skb->sk = NULL;
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return sk;
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}
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return NULL;
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}
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extern void sock_enable_timestamp(struct sock *sk);
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extern int sock_get_timestamp(struct sock *, struct timeval __user *);
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extern int sock_get_timestampns(struct sock *, struct timespec __user *);
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@ -306,11 +306,15 @@ static inline struct sock *__udp4_lib_lookup_skb(struct sk_buff *skb,
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__be16 sport, __be16 dport,
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struct hlist_head udptable[])
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{
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struct sock *sk;
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const struct iphdr *iph = ip_hdr(skb);
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return __udp4_lib_lookup(dev_net(skb->dst->dev), iph->saddr, sport,
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iph->daddr, dport, inet_iif(skb),
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udptable);
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if (unlikely(sk = skb_steal_sock(skb)))
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return sk;
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else
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return __udp4_lib_lookup(dev_net(skb->dst->dev), iph->saddr, sport,
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iph->daddr, dport, inet_iif(skb),
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udptable);
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}
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struct sock *udp4_lib_lookup(struct net *net, __be32 saddr, __be16 sport,
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@ -111,11 +111,15 @@ static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb,
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__be16 sport, __be16 dport,
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struct hlist_head udptable[])
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{
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struct sock *sk;
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struct ipv6hdr *iph = ipv6_hdr(skb);
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return __udp6_lib_lookup(dev_net(skb->dst->dev), &iph->saddr, sport,
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&iph->daddr, dport, inet6_iif(skb),
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udptable);
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if (unlikely(sk = skb_steal_sock(skb)))
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return sk;
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else
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return __udp6_lib_lookup(dev_net(skb->dst->dev), &iph->saddr, sport,
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&iph->daddr, dport, inet6_iif(skb),
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udptable);
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}
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/*
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