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Date:   Wed, 1 Jul 2020 14:02:02 +0800
From:   wenxu <>
To:     Cong Wang <>
Cc:     Paul Blakey <>,
        Linux Kernel Network Developers <>
Subject: Re: [PATCH net] net/sched: act_mirred: fix fragment the packet after
 defrag in act_ct

On 7/1/2020 1:52 PM, Cong Wang wrote:
> On Tue, Jun 30, 2020 at 7:36 PM wenxu <> wrote:
>> On 7/1/2020 3:02 AM, Cong Wang wrote:
>>> On Mon, Jun 29, 2020 at 7:55 PM <> wrote:
>>>> From: wenxu <>
>>>> The fragment packets do defrag in act_ct module. The reassembled packet
>>>> over the mtu in the act_mirred. This big packet should be fragmented
>>>> to send out.
>>> This is too brief. Why act_mirred should handle the burden introduced by
>>> act_ct? And why is this 158-line change targeting -net not -net-next?
>> Hi Cong,
>> In the act_ct the fragment packets will defrag to a big packet and do conntrack things.
>> But in the latter filter mirred action, the big packet normally send over the mtu of outgoing device.
>> So in the act_mirred send the packet should fragment.
> Why act_mirred? Not, for a quick example, a new action called act_defrag?
> I understand you happen to use the combination of act_ct and act_mirred,
> but that is not the reason we should make act_mirred specifically work
> for your case.

Only forward packet case need do fragment again and there is no need do defrag explicit.

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