netdev - Re: sysfs question

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Message-ID: <20091112200141.GA281@e-circ.dyndns.org>
Date:	Thu, 12 Nov 2009 21:01:42 +0100
From:	Kurt Van Dijck <kurt.van.dijck@....be>
To:	Oliver Hartkopp <socketcan@...tkopp.net>
Cc:	Stephen Hemminger <shemminger@...tta.com>,
	Wolfgang Grandegger <wg@...ndegger.com>, netdev@...r.kernel.org
Subject: Re: sysfs question

On Thu, Nov 12, 2009 at 06:44:36PM +0100, Oliver Hartkopp wrote:
> Stephen Hemminger wrote:
> > On Thu, 12 Nov 2009 11:39:41 +0100
> > Kurt Van Dijck <kurt.van.dijck@....be> wrote:
> > 
[...]
> > 
> > It sounds like the property you are proposing is a property of the
> > upper network layer not the hardware. Putting more properties in sysfs
> > is good if is hardware related, but awkward if it is really a protocol
> > attribute.
> 
> Then it would be good here :-)
> 
[...]
> 
> It's definitely no upper network layer stuff.
> 
Ack. It's definitely datalink or even physical layer we're talking about.
> Regards,
> Oliver

I also encountered an issue with regard to the uevent that is generated
when a netdevice is registered.
If I add sysfs files before register_netdevice, the system complains on
creating the sysfs files.
If I add those after register_netdevice, the uevent is _seems_ to have
triggered userspace already, where the udev (in fact, I use another
home-brew one for boot speed) does not find the extra sysfs file.

Is there a mechanism to hold temporarily the uevent until after the
driver has registered some extra sysfs files?

Kurt
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