netdev - Re: [RFC PATCH 1/1] bna: Generic Netlink Interface to collect FW trace

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Date:	Tue, 26 Apr 2011 19:16:29 -0700
From:	Debashis Dutt <debdut@...il.com>
To:	Stephen Hemminger <shemminger@...tta.com>
Cc:	Rasesh Mody <rmody@...cade.com>, netdev@...r.kernel.org,
	davem@...emloft.net, huangj@...cade.com, amathur@...cade.com,
	Debashis Dutt <ddutt@...cade.com>
Subject: Re: [RFC PATCH 1/1] bna: Generic Netlink Interface to collect FW trace

On Tue, Apr 26, 2011 at 6:59 PM, Stephen Hemminger
<shemminger@...tta.com> wrote:
> On Tue, 26 Apr 2011 18:51:57 -0700
> Rasesh Mody <rmody@...cade.com> wrote:
>
>> This is a RFC patch to Brocade BNA 10G Ethernet driver. It adds the generic
>> netlink communication interface to the BNA driver to collect firmware traces
>> using the in-kernel generic netlink infrastructure. The driver uses the
>> "dumpit" handler provided by the generic netlink layer to accomplish this. The
>> driver can extend this interface later if required.
>>
>> As of today, there seems to be no standard mechanism to collect debug
>> information such as firmware trace for a given hardware. Generic Netlinki seems
>> to provide a suitable option to do the same, without any further
>> addition/modification to the existing kernel implementation.
>>
>> This is a RFC patch inviting suggestions/opinions for improvement/modification
>> and requesting consideration for possible inclusion in net-next tree.
>>
>> Signed-off-by: Debashis Dutt <ddutt@...cade.com>
>> Signed-off-by: Rasesh Mody <rmody@...cade.com>
>
> Seems like a lot of work for a debug interface. What about debugfs?
> Or is that out of favor now, I can never keep track...

Stephen,

Well, I think debugfs isn't always available, but there could always
be a driver
configuration option for that.

However, since the generic netlink is a more generic interface, we could use
this infrastructure in the driver for commands which are not part of
other standard tools.

Thanks
--Debashis
>
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