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From: Cong Wang <cwang@twopensource.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: David Miller <davem@davemloft.net>, netdev <netdev@vger.kernel.org>
Subject: Re: [PATCH net] ipv6: introduce tcp_v6_iif()
Date: Fri, 17 Oct 2014 09:58:24 -0700	[thread overview]
Message-ID: <CAHA+R7Od13Bnn3wciLNrA-RsYuYBAjvwAzc20dgGtYT_=EX88w@mail.gmail.com> (raw)
In-Reply-To: <1413562640.24953.26.camel@edumazet-glaptop2.roam.corp.google.com>

On Fri, Oct 17, 2014 at 9:17 AM, Eric Dumazet <eric.dumazet@gmail.com> wrote:
> From: Eric Dumazet <edumazet@google.com>
>
> 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.
>

I doubt we still need to store iif in IP6CB() since we have skb->skb_iif,
we can probably just make inet6_iif() be like inet_iif() so that IP6CB()->iif
can be just removed? Does this make any sense to you?

(I have a patch locally since I thought it should be target for net-next.)

Thanks.

  parent reply	other threads:[~2014-10-17 16:58 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
2014-10-17 16:52   ` Eric Dumazet
2014-10-17 16:58 ` Cong Wang [this message]
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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