From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43)
	id 1Nd20D-00053X-FF
	for qemu-devel@nongnu.org; Thu, 04 Feb 2010 08:44:13 -0500
Received: from [199.232.76.173] (port=49085 helo=monty-python.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.43) id 1Nd20C-000535-Ud
	for qemu-devel@nongnu.org; Thu, 04 Feb 2010 08:44:12 -0500
Received: from Debian-exim by monty-python.gnu.org with spam-scanned (Exim
	4.60) (envelope-from <nsprei@redhat.com>) id 1Nd20B-0001Fx-JI
	for qemu-devel@nongnu.org; Thu, 04 Feb 2010 08:44:12 -0500
Received: from mx1.redhat.com ([209.132.183.28]:55996)
	by monty-python.gnu.org with esmtp (Exim 4.60)
	(envelope-from <nsprei@redhat.com>) id 1Nd20A-0001FU-U4
	for qemu-devel@nongnu.org; Thu, 04 Feb 2010 08:44:11 -0500
Received: from int-mx02.intmail.prod.int.phx2.redhat.com
	(int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12])
	by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id o14Di9Tj015670
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK)
	for <qemu-devel@nongnu.org>; Thu, 4 Feb 2010 08:44:10 -0500
From: Naphtali Sprei <nsprei@redhat.com>
Date: Thu,  4 Feb 2010 15:43:57 +0200
Message-Id: <1265291041-31100-1-git-send-email-nsprei@redhat.com>
Subject: [Qemu-devel] [PATCH v2 0/4] block: more read-only changes,
	related to backing files
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: qemu-devel@nongnu.org
Cc: Naphtali Sprei <nsprei@redhat.com>

This is version 2. The change between previous patch (only 3/4) is the order of closing/re-opening the image.

The read-only changes broke qemu-img create with read-only base image
These changes fix it.
It also make things a little safer, opening the backing file for read-only,
upgrading to read-write only for commit, and back to read-only when done.

Naphtali Sprei (4):
  Add open_flags to BlockDriverState Will be used later
  qemu-img: Fix qemu-img can't create qcow image based on read-only
    image
  Block: readonly changes
  Open backing file read-only also for snapshot mode