netdev - Re: [PATCH] IPv6: fix Mobile IPv6 regression

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Message-ID: <20100531084620.GB1929@jolsa.lab.eng.brq.redhat.com>
Date:	Mon, 31 May 2010 10:46:20 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Brian Haley <brian.haley@...com>
Cc:	David Miller <davem@...emloft.net>,
	Arnaud Ebalard <arno@...isbad.org>,
	Scott C Otto <otts@...atel-lucent.com>,
	YOSHIFUJI Hideaki / 吉藤英明 
	<yoshfuji@...ux-ipv6.org>, netdev@...r.kernel.org
Subject: Re: [PATCH] IPv6: fix Mobile IPv6 regression

On Fri, May 28, 2010 at 02:17:43PM -0400, Brian Haley wrote:
> Commit f4f914b5 (net: ipv6 bind to device issue) caused
> a regression with Mobile IPv6 when it changed the meaning
> of fl->oif to become a strict requirement of the route
> lookup.  Instead, only force strict mode when
> sk->sk_bound_dev_if is set on the calling socket, getting
> the intended behavior and fixing the regression.
> 
> Tested-by: Arnaud Ebalard <arno@...isbad.org>
> Signed-off-by: Brian Haley <brian.haley@...com>
> 
> diff --git a/net/ipv6/route.c b/net/ipv6/route.c
> index 294cbe8..252d761 100644
> --- a/net/ipv6/route.c
> +++ b/net/ipv6/route.c
> @@ -814,7 +814,7 @@ struct dst_entry * ip6_route_output(struct net *net, struct sock *sk,
>  {
>  	int flags = 0;
>  
> -	if (fl->oif || rt6_need_strict(&fl->fl6_dst))
> +	if ((sk && sk->sk_bound_dev_if) || rt6_need_strict(&fl->fl6_dst))
>  		flags |= RT6_LOOKUP_F_IFACE;
>  
>  	if (!ipv6_addr_any(&fl->fl6_src))
hi,

sorry for the late reply, I was out last week..

the change looks ok, I'll verify it with the reproducer
I used for the last fix

thanks,
jirka
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