netdev - Re: [PATCH net] bonding: fix arp monitoring with vlan slaves

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Date:	Sat, 03 Aug 2013 00:40:48 +0200
From:	Nikolay Aleksandrov <nikolay@...hat.com>
To:	David Miller <davem@...emloft.net>
CC:	netdev@...r.kernel.org, andy@...yhouse.net, fubar@...ibm.com
Subject: Re: [PATCH net] bonding: fix arp monitoring with vlan slaves

On 08/03/2013 12:32 AM, David Miller wrote:
> From: Nikolay Aleksandrov <nikolay@...hat.com>
> Date: Fri,  2 Aug 2013 18:41:05 +0200
> 
>> From: Nikolay Aleksandrov <Nikolay Aleksandrov nikolay@...hat.com>
>>
>> When arp monitoring is enabled the bonding relies on slaves'
>> dev_trans_start() value to check if the slave link is up or not, but for
>> 8021q devices that value is either stale or 0, and can't be used. So use
>> the 8021q's underlying device value.
>>
>> Signed-off-by: Nikolay Aleksandrov <nikolay@...hat.com>
> 
> Handling this specially in bonding isn't really ideal.
> 
Indeed, it's not really a bonding problem.

> Please either hide this detail in dev_trans_start(), or (preferrably)
> have vlan_dev_hard_start_xmit() set the trans_start timestamp
> properly thus making this just work for everything.
> 
> Thanks.
> 
Yep, I prefer option 2 as well. I will submit a patch tomorrow, thank you
for the suggestions.

Nik
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