linux-kernel - Re: [RFC Patch] virtio: export model and type in /sys

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Date:	Sat, 12 Feb 2011 17:56:13 +0800
From:	Cong Wang <amwang@...hat.com>
To:	Christoph Hellwig <hch@...radead.org>
CC:	linux-kernel@...r.kernel.org,
	Stephen Hemminger <shemminger@...tta.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Anthony Liguori <aliguori@...ibm.com>,
	Jamie Lokier <jamie@...reable.org>,
	Thomas Weber <swirl@....li>,
	Ben Hutchings <ben@...adent.org.uk>,
	David Woodhouse <David.Woodhouse@...el.com>,
	Andy Fleming <afleming@...escale.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [RFC Patch] virtio: export model and type in /sys

于 2011年02月12日 15:17, Christoph Hellwig 写道:
> On Fri, Feb 04, 2011 at 02:29:55PM +0800, Cong Wang wrote:
>>> It does not make any sense to fill this at all in virtio.  The
>>> attributes are simply exporting the SCSI INQUIRY data, and do not make
>>> any sense at all outside a SCSI context.  In fact the type field even
>>> contains numbers from the scsi protocol spec that just don't make sense.
>>>
>>
>> Hmm, so other non-SCSI devices don't have these neither?
>> Do you have any suggestions to find another way to identify a disk?
>
> Many modern disks have uuid strings identifying them, e.g. virtio-blk
> has a serial attribute for it.  For SCSI and ATA they are retreived
> by issuing the commands to get them through the pass through ioctls
> right now, but I'd love to see the serial sysfs attribute implemented
> there as well.

Hmm, looks promising but needs more efforts.

Thanks!
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