netdev - Re: [PATCH net-next v5 2/7] netfilter: flowtable: fixup UDP timeout depending on ct state

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Message-ID: <Y9VzBcDwtXIRDPkq@salvia>
Date:   Sat, 28 Jan 2023 20:09:57 +0100
From:   Pablo Neira Ayuso <pablo@...filter.org>
To:     Vlad Buslov <vladbu@...dia.com>
Cc:     davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        netdev@...r.kernel.org, netfilter-devel@...r.kernel.org,
        jhs@...atatu.com, xiyou.wangcong@...il.com, jiri@...nulli.us,
        ozsh@...dia.com, marcelo.leitner@...il.com,
        simon.horman@...igine.com
Subject: Re: [PATCH net-next v5 2/7] netfilter: flowtable: fixup UDP timeout
 depending on ct state

On Sat, Jan 28, 2023 at 06:03:37PM +0200, Vlad Buslov wrote:
> 
> On Sat 28 Jan 2023 at 16:27, Pablo Neira Ayuso <pablo@...filter.org> wrote:
> > Hi,
> >
> > On Fri, Jan 27, 2023 at 07:38:40PM +0100, Vlad Buslov wrote:
> >> Currently flow_offload_fixup_ct() function assumes that only replied UDP
> >> connections can be offloaded and hardcodes UDP_CT_REPLIED timeout value.
> >> Allow users to modify timeout calculation by implementing new flowtable
> >> type callback 'timeout' and use the existing algorithm otherwise.
> >> 
> >> To enable UDP NEW connection offload in following patches implement
> >> 'timeout' callback in flowtable_ct of act_ct which extracts the actual
> >> connections state from ct->status and set the timeout according to it.
> >
> > I found a way to fix the netfilter flowtable after your original v3
> > update.
> >
> > Could you use your original patch in v3 for this fixup?
> 
> Sure, please send me the fixup.

What I mean is if you could use your original v3 2/7 for this
conntrack timeout fixup:

https://patchwork.ozlabs.org/project/netfilter-devel/patch/20230119195104.3371966-3-vladbu@nvidia.com/

I will send a patch for netfilter's flowtable datapath to address the
original issue I mentioned, so there is no need for this new timeout
callback.