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ipv6: introduce tcp_v6_iif()

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Commit 971f10eca1 ("tcp: better TCP_SKB_CB layout to reduce cache line
misses") added a regression for SO_BINDTODEVICE on IPv6.

This is because we still use inet6_iif() which expects that IP6 control
block is still at the beginning of skb->cb[]

This patch adds tcp_v6_iif() helper and uses it where necessary.

Because __inet6_lookup_skb() is used by TCP and DCCP, we add an iif
parameter to it.

Signed-off-by: Eric Dumazet <[email protected]>
Fixes: 971f10eca1 ("tcp: better TCP_SKB_CB layout to reduce cache line misses")
Acked-by: Cong Wang <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Eric Dumazet 2014-10-17 09:17:20 -07:00 • committed by David S. Miller
commit 870c315138
5 changed files with 30 additions and 15 deletions
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3
net/dccp/ipv6.c
View file

@ -757,7 +757,8 @@ static int dccp_v6_rcv(struct sk_buff *skb)
/* Step 2:
* Look up flow ID in table and get corresponding socket */
sk = __inet6_lookup_skb(&dccp_hashinfo, skb,
dh->dccph_sport, dh->dccph_dport);
dh->dccph_sport, dh->dccph_dport,
inet6_iif(skb));
/*
* Step 2:
* If no socket ...