netdev - Re: [PATCH net v2] net/sched: act_ct: fix miss set mru for ovs after defrag in act

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Date:   Mon, 03 Aug 2020 15:05:44 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     wenxu@...oud.cn
Cc:     xiyou.wangcong@...il.com, netdev@...r.kernel.org
Subject: Re: [PATCH net v2] net/sched: act_ct: fix miss set mru for ovs
 after defrag in act_ct

From: wenxu@...oud.cn
Date: Fri, 31 Jul 2020 10:45:01 +0800

> From: wenxu <wenxu@...oud.cn>
> 
> When openvswitch conntrack offload with act_ct action. Fragment packets
> defrag in the ingress tc act_ct action and miss the next chain. Then the
> packet pass to the openvswitch datapath without the mru. The over
> mtu packet will be dropped in output action in openvswitch for over mtu.
> 
> "kernel: net2: dropped over-mtu packet: 1528 > 1500"
> 
> This patch add mru in the tc_skb_ext for adefrag and miss next chain
> situation. And also add mru in the qdisc_skb_cb. The act_ct set the mru
> to the qdisc_skb_cb when the packet defrag. And When the chain miss,
> The mru is set to tc_skb_ext which can be got by ovs datapath.
> 
> Fixes: b57dc7c13ea9 ("net/sched: Introduce action ct")
> Signed-off-by: wenxu <wenxu@...oud.cn>

Applied and queued up for -stable, thank you.