netdev - Re: [PATCH v2 net-next ] net/sched: cls_flower add CT_FLAGS

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Date:   Thu, 21 Jan 2021 10:37:37 +0800
From:   wenxu <wenxu@...oud.cn>
To:     Cong Wang <xiyou.wangcong@...il.com>,
        Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
Cc:     Jamal Hadi Salim <jhs@...atatu.com>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: [PATCH v2 net-next ] net/sched: cls_flower add CT_FLAGS_INVALID
 flag support


On 1/21/2021 9:09 AM, Cong Wang wrote:
> On Wed, Jan 20, 2021 at 3:40 PM Marcelo Ricardo Leitner
> <marcelo.leitner@...il.com> wrote:
>> On Wed, Jan 20, 2021 at 02:18:41PM -0800, Cong Wang wrote:
>>> On Tue, Jan 19, 2021 at 12:33 AM <wenxu@...oud.cn> wrote:
>>>> diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c
>>>> index 2d70ded..c565c7a 100644
>>>> --- a/net/core/flow_dissector.c
>>>> +++ b/net/core/flow_dissector.c
>>>> @@ -237,9 +237,8 @@ void skb_flow_dissect_meta(const struct sk_buff *skb,
>>>>  void
>>>>  skb_flow_dissect_ct(const struct sk_buff *skb,
>>>>                     struct flow_dissector *flow_dissector,
>>>> -                   void *target_container,
>>>> -                   u16 *ctinfo_map,
>>>> -                   size_t mapsize)
>>>> +                   void *target_container, u16 *ctinfo_map,
>>>> +                   size_t mapsize, bool post_ct)
>>> Why do you pass this boolean as a parameter when you
>>> can just read it from qdisc_skb_cb(skb)?
>> In this case, yes, but this way skb_flow_dissect_ct() can/is able to
>> not care about what the ->cb actually is. It could be called from
>> somewhere else too.
> This sounds reasonable, it is in net/core/ directory anyway,
> so should be independent of tc even though cls_flower is its
> only caller.
yes. This is the same what I think.
>
> Thanks.
>