netdev - Re: [PATCH v2] net/sched: act_ct: add nat mangle action only for NAT-conntrack

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Message-ID: <20200530122105.GM2491@localhost.localdomain>
Date:   Sat, 30 May 2020 09:21:05 -0300
From:   Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
To:     wenxu@...oud.cn
Cc:     paulb@...lanox.com, netdev@...r.kernel.org
Subject: Re: [PATCH v2] net/sched: act_ct: add nat mangle action only for
 NAT-conntrack

On Sat, May 30, 2020 at 01:54:51PM +0800, wenxu@...oud.cn wrote:
> From: wenxu <wenxu@...oud.cn>
> 
> Currently add nat mangle action with comparing invert and ori tuple.
                                                Nit, "orig" ---^

> It is better to check IPS_NAT_MASK flags first to avoid non necessary
> memcmp for non-NAT conntrack.
> 
> Signed-off-by: wenxu <wenxu@...oud.cn>

Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>

> ---
>  net/sched/act_ct.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/net/sched/act_ct.c b/net/sched/act_ct.c
> index 1a76639..2057735 100644
> --- a/net/sched/act_ct.c
> +++ b/net/sched/act_ct.c
> @@ -199,6 +199,9 @@ static int tcf_ct_flow_table_add_action_nat(struct net *net,
>  	const struct nf_conntrack_tuple *tuple = &ct->tuplehash[dir].tuple;
>  	struct nf_conntrack_tuple target;
>  
> +	if (!(ct->status & IPS_NAT_MASK))
> +		return 0;
> +
>  	nf_ct_invert_tuple(&target, &ct->tuplehash[!dir].tuple);
>  
>  	switch (tuple->src.l3num) {
> -- 
> 1.8.3.1
>