netdev - Re: [PATCH net-next v2] openvswitch: add seqadj extension when NAT is used.

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Message-ID: <CAOrHB_D_RuDsbV8vHRrXZ1UrvPh-oMCaq1Z4LxkmLtQP7geB+w@mail.gmail.com>
Date:   Tue, 26 Mar 2019 09:29:06 -0700
From:   Pravin Shelar <pshelar@....org>
To:     Flavio Leitner <fbl@...close.org>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Joe Stringer <joe@....org>, ovs dev <dev@...nvswitch.org>,
        netfilter-devel@...r.kernel.org
Subject: Re: [PATCH net-next v2] openvswitch: add seqadj extension when NAT is used.

On Mon, Mar 25, 2019 at 11:58 AM Flavio Leitner <fbl@...close.org> wrote:
>
> When the conntrack is initialized, there is no helper attached
> yet so the nat info initialization (nf_nat_setup_info) skips
> adding the seqadj ext.
>
> A helper is attached later when the conntrack is not confirmed
> but is going to be committed. In this case, if NAT is needed then
> adds the seqadj ext as well.
>
> Fixes: 16ec3d4fbb96 ("openvswitch: Fix cached ct with helper.")
> Signed-off-by: Flavio Leitner <fbl@...close.org>
> ---
>  net/openvswitch/conntrack.c | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> Changelog:
> v2 - removed nfct_help(ct) check as it is not necessary.
>
> diff --git a/net/openvswitch/conntrack.c b/net/openvswitch/conntrack.c
> index 51080004677e..845b83598e0d 100644
> --- a/net/openvswitch/conntrack.c
> +++ b/net/openvswitch/conntrack.c
> @@ -990,6 +990,12 @@ static int __ovs_ct_lookup(struct net *net, struct sw_flow_key *key,
>                                                             GFP_ATOMIC);
>                         if (err)
>                                 return err;
> +
> +                       /* helper installed, add seqadj if NAT is required */
> +                       if (info->nat && !nfct_seqadj(ct)) {
> +                               if (!nfct_seqadj_ext_add(ct))
> +                                       return -EINVAL;
> +                       }
>                 }
>
>                 /* Call the helper only if:

Acked-by: Pravin B Shelar <pshelar@....org>

Thanks,
Pravin.