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net: Call skb_checksum_init in IPv6 

Call skb_checksum_init instead of private functions.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert 2014-05-02 16:29:51 -07:00 committed by David S. Miller
parent ed70fcfcee
commit e4f45b7f40
3 changed files with 9 additions and 30 deletions
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7
include/net/ip6_checksum.h
View File

@ -41,6 +41,13 @@ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
__wsum csum); __wsum csum);
#endif #endif
static inline __wsum ip6_compute_pseudo(struct sk_buff *skb, int proto)
{
return ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
&ipv6_hdr(skb)->daddr,
skb->len, proto, 0));
}
static __inline__ __sum16 tcp_v6_check(int len, static __inline__ __sum16 tcp_v6_check(int len,
const struct in6_addr *saddr, const struct in6_addr *saddr,
const struct in6_addr *daddr, const struct in6_addr *daddr,

11
net/ipv6/ip6_checksum.c
View File

@ -84,16 +84,7 @@ int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, int proto)
&ipv6_hdr(skb)->daddr, ntohs(uh->dest)); &ipv6_hdr(skb)->daddr, ntohs(uh->dest));
return 1; return 1;
} }
if (skb->ip_summed == CHECKSUM_COMPLETE &&
!csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
skb->len, proto, skb->csum))
skb->ip_summed = CHECKSUM_UNNECESSARY;
if (!skb_csum_unnecessary(skb)) return skb_checksum_init(skb, IPPROTO_UDP, ip6_compute_pseudo);
skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
&ipv6_hdr(skb)->daddr,
skb->len, proto, 0));
return 0;
} }
EXPORT_SYMBOL(udp6_csum_init); EXPORT_SYMBOL(udp6_csum_init);

21
net/ipv6/tcp_ipv6.c
View File

@ -1294,25 +1294,6 @@ out:
return NULL; return NULL;
} }
static __sum16 tcp_v6_checksum_init(struct sk_buff *skb)
{
if (skb->ip_summed == CHECKSUM_COMPLETE) {
if (!tcp_v6_check(skb->len, &ipv6_hdr(skb)->saddr,
&ipv6_hdr(skb)->daddr, skb->csum)) {
skb->ip_summed = CHECKSUM_UNNECESSARY;
return 0;
}
}
skb->csum = ~csum_unfold(tcp_v6_check(skb->len,
&ipv6_hdr(skb)->saddr,
&ipv6_hdr(skb)->daddr, 0));
if (skb->len <= 76)
return __skb_checksum_complete(skb);
return 0;
}
/* The socket must have it's spinlock held when we get /* The socket must have it's spinlock held when we get
* here. * here.
* *
@ -1486,7 +1467,7 @@ static int tcp_v6_rcv(struct sk_buff *skb)
if (!pskb_may_pull(skb, th->doff*4)) if (!pskb_may_pull(skb, th->doff*4))
goto discard_it; goto discard_it;
if (!skb_csum_unnecessary(skb) && tcp_v6_checksum_init(skb)) if (skb_checksum_init(skb, IPPROTO_TCP, ip6_compute_pseudo))
goto csum_error; goto csum_error;
th = tcp_hdr(skb); th = tcp_hdr(skb);