netdev - Re: [PATCH v4 net-next 3/3] net/sched: sch_frag: add generic packet fragment support.

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Message-ID: <CAM_iQpWO=vvw_iK9KaQAzEULXzUmmQWxs8xzNsXhTj3i4WcnbQ@mail.gmail.com>
Date:   Wed, 25 Nov 2020 21:03:37 -0800
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Jamal Hadi Salim <jhs@...atatu.com>, wenxu <wenxu@...oud.cn>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Marcelo Ricardo Leitner <marcelo.leitner@...il.com>,
        Vlad Buslov <vladbu@...dia.com>
Subject: Re: [PATCH v4 net-next 3/3] net/sched: sch_frag: add generic packet
 fragment support.

On Wed, Nov 25, 2020 at 11:11 AM Jakub Kicinski <kuba@...nel.org> wrote:
>
> On Wed, 25 Nov 2020 12:01:23 +0800 wenxu@...oud.cn wrote:
> > From: wenxu <wenxu@...oud.cn>
> >
> > Currently kernel tc subsystem can do conntrack in cat_ct. But when several
> > fragment packets go through the act_ct, function tcf_ct_handle_fragments
> > will defrag the packets to a big one. But the last action will redirect
> > mirred to a device which maybe lead the reassembly big packet over the mtu
> > of target device.
> >
> > This patch add support for a xmit hook to mirred, that gets executed before
> > xmiting the packet. Then, when act_ct gets loaded, it configs that hook.
> > The frag xmit hook maybe reused by other modules.
> >
> > Signed-off-by: wenxu <wenxu@...oud.cn>
>
> LGMT. Cong, Jamal still fine by you guys?

Yes, I do not look much into detail, but overall it definitely looks good.
This is targeting net-next, so it is fine to fix anything we miss later.

Acked-by: Cong Wang <cong.wang@...edance.com>

Thanks.