netdev - Re: [PATCH net-next] net: ovs: fix ovs_drop

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Message-ID: <CADxym3b1UwvMDpURt_b9J9c0P4eg319Eea5fkrdi65k7NRwjKw@mail.gmail.com>
Date: Wed, 21 Aug 2024 19:59:53 +0800
From: Menglong Dong <menglong8.dong@...il.com>
To: Adrián Moreno <amorenoz@...hat.com>
Cc: kuba@...nel.org, pshelar@....org, davem@...emloft.net, edumazet@...gle.com, 
	pabeni@...hat.com, netdev@...r.kernel.org, dev@...nvswitch.org, 
	linux-kernel@...r.kernel.org, Menglong Dong <dongml2@...natelecom.cn>
Subject: Re: [PATCH net-next] net: ovs: fix ovs_drop_reasons error

On Tue, Aug 20, 2024 at 10:23 PM Adrián Moreno <amorenoz@...hat.com> wrote:
>
> On Thu, Aug 15, 2024 at 08:22:45PM GMT, Menglong Dong wrote:
> > I'm sure if I understand it correctly, but it seems that there is
> > something wrong with ovs_drop_reasons.
> >
> > ovs_drop_reasons[0] is "OVS_DROP_LAST_ACTION", but
> > OVS_DROP_LAST_ACTION == __OVS_DROP_REASON + 1, which means that
> > ovs_drop_reasons[1] should be "OVS_DROP_LAST_ACTION".
> >
> > Fix this by initializing ovs_drop_reasons with index.
> >
> > Fixes: 9d802da40b7c ("net: openvswitch: add last-action drop reason")
> > Signed-off-by: Menglong Dong <dongml2@...natelecom.cn>
>
> The patch looks good to me. Also, tested and verified that,
> without the patch, adding flow to drop packets results in:
>
> drop at: do_execute_actions+0x197/0xb20 [openvsw (0xffffffffc0db6f97)
> origin: software
> input port ifindex: 8
> timestamp: Tue Aug 20 10:19:17 2024 859853461 nsec
> protocol: 0x800
> length: 98
> original length: 98
> drop reason: OVS_DROP_ACTION_ERROR
>
> With the patch, the same results in:
>
> drop at: do_execute_actions+0x197/0xb20 [openvsw (0xffffffffc0db6f97)
> origin: software
> input port ifindex: 8
> timestamp: Tue Aug 20 10:16:13 2024 475856608 nsec
> protocol: 0x800
> length: 98
> original length: 98
> drop reason: OVS_DROP_LAST_ACTION
>
> Tested-by: Adrian Moreno <amorenoz@...hat.com>
> Reviewed-by: Adrian Moreno <amorenoz@...hat.com>
>

Thanks! I'll resend this patch to the net branch
with your testing.