From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43)
	id 1M970g-0004br-5s
	for qemu-devel@nongnu.org; Tue, 26 May 2009 20:28:46 -0400
Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43)
	id 1M970a-0004b8-Kx
	for qemu-devel@nongnu.org; Tue, 26 May 2009 20:28:44 -0400
Received: from [199.232.76.173] (port=43021 helo=monty-python.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.43) id 1M970a-0004b4-Fp
	for qemu-devel@nongnu.org; Tue, 26 May 2009 20:28:40 -0400
Received: from mx2.redhat.com ([66.187.237.31]:58308)
	by monty-python.gnu.org with esmtp (Exim 4.60)
	(envelope-from <john.cooper@redhat.com>) id 1M970Z-0006Bx-Tp
	for qemu-devel@nongnu.org; Tue, 26 May 2009 20:28:40 -0400
Message-ID: <4A1C88BD.6020000@redhat.com>
Date: Tue, 26 May 2009 20:26:37 -0400
From: john cooper <john.cooper@redhat.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Subject: [Qemu-devel] [PATCH 0/2] Add serial number support for virtio_blk,
	V3
List-Id: qemu-devel.nongnu.org
List-Unsubscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/pipermail/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: KVM list <kvm@vger.kernel.org>, qemu-devel@nongnu.org
Cc: john.cooper@redhat.com

[Rework of earlier patch, 2/2 modified to use
an existing interface]

This patch allows passing of a virtio_blk drive
serial number from qemu into a guest's virtio_blk
driver, and provides a means to access the serial
number from a guest's userspace.

Equivalent functionality currently exists for IDE
and SCSI, however it is not yet implemented for
virtio.  Scenarios exist where guest code relies
on a unique drive serial number to correctly
identify the machine environment in which it
exists.

The following two patches implement the above:

   qemu-vblk-serial-3.patch

which provides the qemu missing bits to interpret
a '-drive .. serial=XYZ ..' flag, and:

   virtio_blk-serial-3.patch

which extracts this information and makes it
available to guest userspace via an HDIO_GET_IDENTITY
ioctl, eg: 'hdparm -i /dev/vda'.

The above patches are relative to qemu-kvm.git and
2.6.29.3 respectively.

-john


-- 
john.cooper@redhat.com