On 6/29/20 7:54 PM, we...@ucloud.cn wrote:
> From: wenxu <we...@ucloud.cn>
>
> 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.
>
> Fixes: b57dc7c13ea9 ("net/sched: Introduce action ct")
> Signed-off-by: wenxu <we...@ucloud.cn>
> ---
> This patch is based on
> http://patchwork.ozlabs.org/project/netdev/patch/1593422178-26949-1-git-send-email-we...@ucloud.cn/
>
> include/net/sch_generic.h | 6 +-
> net/sched/act_ct.c | 7 ++-
> net/sched/act_mirred.c | 157
> ++++++++++++++++++++++++++++++++++++++++++++--
> 3 files changed, 158 insertions(+), 12 deletions(-)
>
> diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
> index c510b03..3597244 100644
> --- a/include/net/sch_generic.h
> +++ b/include/net/sch_generic.h
> @@ -384,6 +384,7 @@ struct qdisc_skb_cb {
> };
> #define QDISC_CB_PRIV_LEN 20
> unsigned char data[QDISC_CB_PRIV_LEN];
> + u16 mru;
> };
>
Wow, this change is potentially a big problem.
Explain why act_ct/act_mirred need to pollute qdisc_skb_cb
