netdev - Re: [PATCH] ipvs: no need to update skb route entry for local destination packets.

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Date:   Mon, 30 Sep 2019 21:49:38 +0300 (EEST)
From:   Julian Anastasov <ja@....bg>
To:     zhang kai <zhangkaiheb@....com>
cc:     Wensong Zhang <wensong@...ux-vs.org>,
        Simon Horman <horms@...ge.net.au>, lvs-devel@...r.kernel.org,
        netdev@...r.kernel.org, netfilter-devel@...r.kernel.org
Subject: Re: [PATCH] ipvs: no need to update skb route entry for local
 destination packets.


	Hello,

On Mon, 30 Sep 2019, zhang kai wrote:

> In the end of function __ip_vs_get_out_rt/__ip_vs_get_out_rt_v6,the
> 'local' variable is always zero.
> 
> Signed-off-by: zhang kai <zhangkaiheb@....com>

	Looks good to me, thanks!

Acked-by: Julian Anastasov <ja@....bg>

	Simon, this is for -next kernels...

> ---
>  net/netfilter/ipvs/ip_vs_xmit.c | 18 ++++++------------
>  1 file changed, 6 insertions(+), 12 deletions(-)
> 
> diff --git a/net/netfilter/ipvs/ip_vs_xmit.c b/net/netfilter/ipvs/ip_vs_xmit.c
> index 9c464d24beec..037c7c91044e 100644
> --- a/net/netfilter/ipvs/ip_vs_xmit.c
> +++ b/net/netfilter/ipvs/ip_vs_xmit.c
> @@ -407,12 +407,9 @@ __ip_vs_get_out_rt(struct netns_ipvs *ipvs, int skb_af, struct sk_buff *skb,
>  		goto err_put;
>  
>  	skb_dst_drop(skb);
> -	if (noref) {
> -		if (!local)
> -			skb_dst_set_noref(skb, &rt->dst);
> -		else
> -			skb_dst_set(skb, dst_clone(&rt->dst));
> -	} else
> +	if (noref)
> +		skb_dst_set_noref(skb, &rt->dst);
> +	else
>  		skb_dst_set(skb, &rt->dst);
>  
>  	return local;
> @@ -574,12 +571,9 @@ __ip_vs_get_out_rt_v6(struct netns_ipvs *ipvs, int skb_af, struct sk_buff *skb,
>  		goto err_put;
>  
>  	skb_dst_drop(skb);
> -	if (noref) {
> -		if (!local)
> -			skb_dst_set_noref(skb, &rt->dst);
> -		else
> -			skb_dst_set(skb, dst_clone(&rt->dst));
> -	} else
> +	if (noref)
> +		skb_dst_set_noref(skb, &rt->dst);
> +	else
>  		skb_dst_set(skb, &rt->dst);
>  
>  	return local;
> -- 
> 2.17.1

Regards

--
Julian Anastasov <ja@....bg>