netdev - Re: [PATCH net-next 1/3] net/sched: Introduce action ct

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Message-ID: <4b2dfcb1-47b2-647f-a2d9-a6722f1af9b3@mellanox.com>
Date:   Thu, 13 Jun 2019 13:46:29 +0000
From:   Paul Blakey <paulb@...lanox.com>
To:     Toke Høiland-Jørgensen <toke@...hat.com>,
        Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
CC:     Jiri Pirko <jiri@...lanox.com>, Roi Dayan <roid@...lanox.com>,
        Yossi Kuperman <yossiku@...lanox.com>,
        Oz Shlomo <ozsh@...lanox.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        David Miller <davem@...emloft.net>,
        Aaron Conole <aconole@...hat.com>,
        Zhike Wang <wangzhike@...com>,
        Rony Efraim <ronye@...lanox.com>,
        "nst-kernel@...hat.com" <nst-kernel@...hat.com>,
        John Hurley <john.hurley@...ronome.com>,
        Simon Horman <simon.horman@...ronome.com>,
        Justin Pettit <jpettit@....org>,
        Kevin Darbyshire-Bryant <kevin@...byshire-bryant.me.uk>
Subject: Re: [PATCH net-next 1/3] net/sched: Introduce action ct


On 6/11/2019 11:23 PM, Toke Høiland-Jørgensen wrote:
> Marcelo Ricardo Leitner <marcelo.leitner@...il.com> writes:
>
>> On Tue, Jun 11, 2019 at 05:34:50PM +0200, Toke Høiland-Jørgensen wrote:
>>> Paul Blakey <paulb@...lanox.com> writes:
>>>
>>>> On 6/11/2019 4:59 PM, Toke Høiland-Jørgensen wrote:
>>>>> Paul Blakey <paulb@...lanox.com> writes:
>>>>>
>>>>>> Allow sending a packet to conntrack and set conntrack zone, mark,
>>>>>> labels and nat parameters.
>>>>> How is this different from the newly merged ctinfo action?
>>>>>
>>>>> -Toke
>>>> Hi,
>>>>
>>>> ctinfo does one of two very specific things,
>>>>
>>>> 1) copies DSCP values that have been placed in the firewall conntrack
>>>> mark back into the IPv4/v6 diffserv field
>>>>
>>>> 2) copies the firewall conntrack mark to the skb's mark field (like
>>>> act_connmark)
>>>>
>>>> Originally ctinfo action was named conndscp (then conntrack, which is
>>>> what our ct shorthand stands for).
>>>>
>>>> We also talked about merging both at some point, but they seem only
>>>> coincidentally related.
>>> Well, I'm predicting it will create some confusion to have them so
>>> closely named... Not sure what the best way to fix that is, though...?
>> I had suggested to let act_ct handle the above as well, as there is a
>> big chunk of code on both that is pretty similar. There is quite some
>> boilerplate for interfacing with conntrack which is duplicated.
>> But it was considered that the end actions are unrelated, and ctinfo
>> went ahead. (I'm still not convinced of that, btw)
>>
>> Other than this, which is not an option anymore, I don't see a way to
>> avoid confusion here. Seems anything we pick now will be confusing
>> because ctinfo is a generic name, and we also need one here.
> Hmm, yeah, dunno if I have any better ideas for naming that would avoid
> this. act_runct ? Meh...
>
> -Toke


If it's fine with you guys, can we keep the name act_ct ? :)