netdev - Re: [PATCH] ipv4: fix ipsec forward performance regression

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Date:	Sun, 23 Oct 2011 11:03:10 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	"Yan, Zheng" <zheng.z.yan@...el.com>
Cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"davem@...emloft.net" <davem@...emloft.net>,
	Kim Phillips <kim.phillips@...escale.com>
Subject: Re: [PATCH] ipv4: fix ipsec forward performance regression

Le dimanche 23 octobre 2011 à 15:58 +0800, Yan, Zheng a écrit :
> There is bug in commit 5e2b61f(ipv4: Remove flowi from struct rtable).
> It makes xfrm4_fill_dst() modify wrong data structure.
> 
> Signed-off-by: Zheng Yan <zheng.z.yan@...el.com>
> ---
>  net/ipv4/xfrm4_policy.c |   14 +++++++-------
>  1 files changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c
> index fc5368a..a0b4c5d 100644
> --- a/net/ipv4/xfrm4_policy.c
> +++ b/net/ipv4/xfrm4_policy.c
> @@ -79,13 +79,13 @@ static int xfrm4_fill_dst(struct xfrm_dst *xdst, struct net_device *dev,
>  	struct rtable *rt = (struct rtable *)xdst->route;
>  	const struct flowi4 *fl4 = &fl->u.ip4;
>  
> -	rt->rt_key_dst = fl4->daddr;
> -	rt->rt_key_src = fl4->saddr;
> -	rt->rt_key_tos = fl4->flowi4_tos;
> -	rt->rt_route_iif = fl4->flowi4_iif;
> -	rt->rt_iif = fl4->flowi4_iif;
> -	rt->rt_oif = fl4->flowi4_oif;
> -	rt->rt_mark = fl4->flowi4_mark;
> +	xdst->u.rt.rt_key_dst = fl4->daddr;
> +	xdst->u.rt.rt_key_src = fl4->saddr;
> +	xdst->u.rt.rt_key_tos = fl4->flowi4_tos;
> +	xdst->u.rt.rt_route_iif = fl4->flowi4_iif;
> +	xdst->u.rt.rt_iif = fl4->flowi4_iif;
> +	xdst->u.rt.rt_oif = fl4->flowi4_oif;
> +	xdst->u.rt.rt_mark = fl4->flowi4_mark;
>  
>  	xdst->u.dst.dev = dev;
>  	dev_hold(dev);

Good catch, thanks !

Reported-by: Kim Phillips <kim.phillips@...escale.com>

Acked-by: Eric Dumazet <eric.dumazet@...il.com>


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