linux-kernel - Re: can we move USB_DEVICEFS to non-embedded?

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4A54A938.5030807@redhat.com>
Date:	Wed, 08 Jul 2009 10:12:08 -0400
From:	Peter Jones <pjones@...hat.com>
To:	Greg KH <gregkh@...e.de>
CC:	Dave Airlie <airlied@...il.com>,
	Jeff Chua <jeff.chua.linux@...il.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Scott James Remnant <scott@...onical.com>,
	Kay Sievers <kay.sievers@...y.org>,
	Dave Jones <davej@...hat.com>
Subject: Re: can we move USB_DEVICEFS to non-embedded?

Greg KH wrote:
> On Wed, Jul 08, 2009 at 09:55:04AM -0400, Peter Jones wrote:
>> On 07/08/2009 09:52 AM, Peter Jones wrote:
>>> On 07/08/2009 06:54 AM, Dave Airlie wrote:
>>>
>>>> I'm not quite sure if something in the F11 initrd needs usbfs for
>>>> something (cc'ed Peter)
>>> Not a thing.
>> Actually, I take it back.  We do mount usbfs, and we examine
>> /proc/bus/usb/devices as a heuristic to try and determine if
>> all the devices have been enumerated.
> 
> How can you ever know if all devices are enumerated as you don't know
> how many devices will be showing up?

You don't, that's why I said it's a heuristic.  But basically, we have a 
timeout, and if the device list doesn't change in that amount of time, we
call it done.

It's not the best technique ever, but it does work.

>> So that could be related to what you're seeing.
> 
> That file is now available in /sys/kernel/debug/usb/devices if you
> really need it.

Oh, okay.  I can change it to use that then.

> But I would think that you do not.

Well, we pretty much do until we switch to dracut.

-- 
   Peter
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/