netdev - Re: [PATCH net-next 2/2] net/sched: act_frag: add implict packet fragment support.

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Message-ID: <20201104140111.5a105039@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Wed, 4 Nov 2020 14:01:11 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     wenxu@...oud.cn
Cc:     marcelo.leitner@...il.com, netdev@...r.kernel.org
Subject: Re: [PATCH net-next 2/2] net/sched: act_frag: add implict packet
 fragment support.

On Wed,  4 Nov 2020 16:56:32 +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>

net/sched/act_api.c:27:1: warning: symbol 'tcf_xmit_hook_in_use' was not declared. Should it be static?