From: David Laight <David.Laight@ACULAB.COM>
To: 'Eric Dumazet' <eric.dumazet@gmail.com>,
David Miller <davem@davemloft.net>
Cc: netdev <netdev@vger.kernel.org>
Subject: RE: [PATCH net] ipv6: introduce tcp_v6_iif()
Date: Fri, 17 Oct 2014 16:26:51 +0000 [thread overview]
Message-ID: <063D6719AE5E284EB5DD2968C1650D6D1C9D8C89@AcuExch.aculab.com> (raw)
In-Reply-To: <1413562640.24953.26.camel@edumazet-glaptop2.roam.corp.google.com>
From: Eric Dumazet
> Commit 971f10eca186 ("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.
...
> diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
> index cf2e45ab2fa4..831495529b82 100644
> --- a/net/ipv6/tcp_ipv6.c
> +++ b/net/ipv6/tcp_ipv6.c
> @@ -424,6 +424,7 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
> if (sock_owned_by_user(sk))
> goto out;
>
> + /* Note : We use inet6_iif() here, not tcp_v6_iif() */
> req = inet6_csk_search_req(sk, &prev, th->dest, &hdr->daddr,
> &hdr->saddr, inet6_iif(skb));
> if (!req)
That comment isn't particularly informative....
David
next prev parent reply other threads:[~2014-10-17 16:28 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-17 16:17 [PATCH net] ipv6: introduce tcp_v6_iif() Eric Dumazet
2014-10-17 16:26 ` David Laight [this message]
2014-10-17 16:52 ` Eric Dumazet
2014-10-17 16:58 ` Cong Wang
2014-10-17 18:19 ` Eric Dumazet
2014-10-18 0:00 ` Cong Wang
2014-10-18 0:02 ` Cong Wang
2014-10-18 3:48 ` David Miller
2014-10-18 15:30 ` Eric Dumazet
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