linux-kernel - Re: Class device namespaces

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Message-ID: <ac3eb2510904281842i785ee135h98502522f242f3f6@mail.gmail.com>
Date:	Wed, 29 Apr 2009 03:42:08 +0200
From:	Kay Sievers <kay.sievers@...y.org>
To:	Doug Warzecha <Douglas_Warzecha@...l.com>
Cc:	Jean Delvare <khali@...ux-fr.org>,
	Michael Brown <mebrown@...haels-house.net>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	linux-kernel@...r.kernel.org,
	Mauro Carvalho Chehab <mchehab@...radead.org>,
	Matt Domsch <Matt_Domsch@...l.com>
Subject: Re: Class device namespaces

On Tue, Apr 28, 2009 at 23:58, Doug Warzecha <Douglas_Warzecha@...l.com> wrote:
> On Tue, Apr 28, 2009 at 07:46:57PM +0200, Kay Sievers wrote:
>> On Tue, Apr 28, 2009 at 19:39, Doug Warzecha <Douglas_Warzecha@...l.com> wrote:
>>
>> > /sys/class/firmware/dell_rbu/loading
>> > /sys/class/firmware/dell_rbu/data
>>
>> These pathes only ever exist for a fraction of a second, during a
>> kernel initiated firmware request. This request is usually only
>> handled by the udev firmware loader script, and not interesting for
>> anything else. Are you replacing the udev firmware script here? Are
>> you sure you do something else here?
>
> A Dell library writes data to those paths when a Dell BIOS Update Package is run and requests the BIOS image to be loaded into memory.

How do you do this? These paths exist for a short time only. How do
you get udev out of your way handling the firmware request for you?
How do you plug into the event processing with a custom tool?

Thanks,
Kay
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