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>
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@ -91,6 +91,17 @@ static inline struct sock *__inet6_lookup(struct net *net,
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return inet6_lookup_listener(net, hashinfo, daddr, hnum, dif);
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}
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static inline struct sock *__inet6_lookup_skb(struct inet_hashinfo *hashinfo,
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struct sk_buff *skb,
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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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}
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extern struct sock *inet6_lookup(struct net *net, struct inet_hashinfo *hashinfo,
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const struct in6_addr *saddr, const __be16 sport,
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const struct in6_addr *daddr, const __be16 dport,
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@ -16,6 +16,7 @@
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#include <linux/interrupt.h>
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#include <linux/ip.h>
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#include <linux/ipv6.h>
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#include <linux/list.h>
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#include <linux/slab.h>
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@ -28,6 +29,7 @@
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#include <net/inet_connection_sock.h>
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#include <net/inet_sock.h>
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#include <net/sock.h>
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#include <net/route.h>
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#include <net/tcp_states.h>
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#include <net/netns/hash.h>
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@ -371,6 +373,18 @@ static inline struct sock *inet_lookup(struct net *net,
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return sk;
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}
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static inline struct sock *__inet_lookup_skb(struct inet_hashinfo *hashinfo,
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struct sk_buff *skb,
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const __be16 sport,
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const __be16 dport)
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{
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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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}
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extern int __inet_hash_connect(struct inet_timewait_death_row *death_row,
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struct sock *sk, u32 port_offset,
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int (*check_established)(struct inet_timewait_death_row *,
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@ -811,9 +811,8 @@ static int dccp_v4_rcv(struct sk_buff *skb)
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/* Step 2:
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* Look up flow ID in table and get corresponding socket */
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sk = __inet_lookup(dev_net(skb->dst->dev), &dccp_hashinfo,
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iph->saddr, dh->dccph_sport,
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iph->daddr, dh->dccph_dport, inet_iif(skb));
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sk = __inet_lookup_skb(&dccp_hashinfo, skb,
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dh->dccph_sport, dh->dccph_dport);
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/*
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* Step 2:
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* If no socket ...
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@ -805,10 +805,8 @@ static int dccp_v6_rcv(struct sk_buff *skb)
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/* Step 2:
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* Look up flow ID in table and get corresponding socket */
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sk = __inet6_lookup(dev_net(skb->dst->dev), &dccp_hashinfo,
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&ipv6_hdr(skb)->saddr, dh->dccph_sport,
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&ipv6_hdr(skb)->daddr, ntohs(dh->dccph_dport),
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inet6_iif(skb));
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sk = __inet6_lookup_skb(&dccp_hashinfo, skb,
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dh->dccph_sport, dh->dccph_dport);
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/*
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* Step 2:
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* If no socket ...
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@ -1577,8 +1577,7 @@ int tcp_v4_rcv(struct sk_buff *skb)
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TCP_SKB_CB(skb)->flags = iph->tos;
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TCP_SKB_CB(skb)->sacked = 0;
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sk = __inet_lookup(net, &tcp_hashinfo, iph->saddr,
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th->source, iph->daddr, th->dest, inet_iif(skb));
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sk = __inet_lookup_skb(&tcp_hashinfo, skb, th->source, th->dest);
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if (!sk)
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goto no_tcp_socket;
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@ -1681,11 +1681,7 @@ static int tcp_v6_rcv(struct sk_buff *skb)
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TCP_SKB_CB(skb)->flags = ipv6_get_dsfield(ipv6_hdr(skb));
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TCP_SKB_CB(skb)->sacked = 0;
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sk = __inet6_lookup(net, &tcp_hashinfo,
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&ipv6_hdr(skb)->saddr, th->source,
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&ipv6_hdr(skb)->daddr, ntohs(th->dest),
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inet6_iif(skb));
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sk = __inet6_lookup_skb(&tcp_hashinfo, skb, th->source, th->dest);
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if (!sk)
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goto no_tcp_socket;
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