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platform_kernel-5.15
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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>
This commit is contained in:
Arnaldo Carvalho de Melo 2008-10-07 11:41:57 -07:00 committed by David S. Miller
parent c7004482e8
commit 9a1f27c480
6 changed files with 31 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
include/net/inet6_hashtables.h
View File

@ -91,6 +91,17 @@ static inline struct sock *__inet6_lookup(struct net *net,
return inet6_lookup_listener(net, hashinfo, daddr, hnum, dif);
}
static inline struct sock *__inet6_lookup_skb(struct inet_hashinfo *hashinfo,
struct sk_buff *skb,
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));
}
extern struct sock *inet6_lookup(struct net *net, struct inet_hashinfo *hashinfo,
const struct in6_addr *saddr, const __be16 sport,
const struct in6_addr *daddr, const __be16 dport,

14
include/net/inet_hashtables.h
View File

@ -16,6 +16,7 @@
#include <linux/interrupt.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/list.h>
#include <linux/slab.h>
@ -28,6 +29,7 @@
#include <net/inet_connection_sock.h>
#include <net/inet_sock.h>
#include <net/sock.h>
#include <net/route.h>
#include <net/tcp_states.h>
#include <net/netns/hash.h>
@ -371,6 +373,18 @@ static inline struct sock *inet_lookup(struct net *net,
return sk;
}
static inline struct sock *__inet_lookup_skb(struct inet_hashinfo *hashinfo,
struct sk_buff *skb,
const __be16 sport,
const __be16 dport)
{
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));
}
extern int __inet_hash_connect(struct inet_timewait_death_row *death_row,
struct sock *sk, u32 port_offset,
int (*check_established)(struct inet_timewait_death_row *,

5
net/dccp/ipv4.c
View File

@ -811,9 +811,8 @@ static int dccp_v4_rcv(struct sk_buff *skb)
/* Step 2:
* Look up flow ID in table and get corresponding socket */
sk = __inet_lookup(dev_net(skb->dst->dev), &dccp_hashinfo,
iph->saddr, dh->dccph_sport,
iph->daddr, dh->dccph_dport, inet_iif(skb));
sk = __inet_lookup_skb(&dccp_hashinfo, skb,
dh->dccph_sport, dh->dccph_dport);
/*
* Step 2:
* If no socket ...

6
net/dccp/ipv6.c
View File

@ -805,10 +805,8 @@ static int dccp_v6_rcv(struct sk_buff *skb)
/* Step 2:
* Look up flow ID in table and get corresponding socket */
sk = __inet6_lookup(dev_net(skb->dst->dev), &dccp_hashinfo,
&ipv6_hdr(skb)->saddr, dh->dccph_sport,
&ipv6_hdr(skb)->daddr, ntohs(dh->dccph_dport),
inet6_iif(skb));
sk = __inet6_lookup_skb(&dccp_hashinfo, skb,
dh->dccph_sport, dh->dccph_dport);
/*
* Step 2:
* If no socket ...

3
net/ipv4/tcp_ipv4.c
View File

@ -1577,8 +1577,7 @@ int tcp_v4_rcv(struct sk_buff *skb)
TCP_SKB_CB(skb)->flags = iph->tos;
TCP_SKB_CB(skb)->sacked = 0;
sk = __inet_lookup(net, &tcp_hashinfo, iph->saddr,
th->source, iph->daddr, th->dest, inet_iif(skb));
sk = __inet_lookup_skb(&tcp_hashinfo, skb, th->source, th->dest);
if (!sk)
goto no_tcp_socket;

6
net/ipv6/tcp_ipv6.c
View File

@ -1681,11 +1681,7 @@ static int tcp_v6_rcv(struct sk_buff *skb)
TCP_SKB_CB(skb)->flags = ipv6_get_dsfield(ipv6_hdr(skb));
TCP_SKB_CB(skb)->sacked = 0;
sk = __inet6_lookup(net, &tcp_hashinfo,
&ipv6_hdr(skb)->saddr, th->source,
&ipv6_hdr(skb)->daddr, ntohs(th->dest),
inet6_iif(skb));
sk = __inet6_lookup_skb(&tcp_hashinfo, skb, th->source, th->dest);
if (!sk)
goto no_tcp_socket;