linux-kernel - Re: [PATCH] act_mirred: do not drop packets when fails to mirror it

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Message-ID: <502C95E5.9040304@redhat.com>
Date:	Thu, 16 Aug 2012 14:40:37 +0800
From:	Jason Wang <jasowang@...hat.com>
To:	jhs@...atatu.com
CC:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	davem@...emloft.net
Subject: Re: [PATCH] act_mirred: do not drop packets when fails to mirror
 it

On 08/15/2012 11:10 PM, Jamal Hadi Salim wrote:
> On Wed, 2012-08-15 at 21:42 +0800, Jason Wang wrote:
>
>> I met it actually through the following steps:
>>
>> - start a kvm guest with tap and make it to be an interface of the bridge
>> - mirror the ingress traffic of the bridge to the tap
>> - terminate the qemu process, the tap device is then removed
>> - all packet goes to bridge would be dropped, so the network of guests
>> in the same bridge would be broken
>>
> Makes sense.
> Can you please leave the err check braces i.e
>          if (err) {
>                  m->tcf_qstats.overlimits++;
>                  if (m->tcfm_eaction != TCA_EGRESS_MIRROR)
>                          retval = TC_ACT_SHOT;
>                  else
>                      retval = m->tcf_action;
>          } else {
>                  retval = m->tcf_action;
>          }
>
> Or at least dont use TC_ACT_STOLEN.
>
> cheers,
> jamal
>

Sure, will post v2. Thanks.
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