From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([140.186.70.92]:37521)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <kwolf@redhat.com>) id 1QXVD8-0006ig-6H
	for qemu-devel@nongnu.org; Fri, 17 Jun 2011 05:19:31 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <kwolf@redhat.com>) id 1QXVD7-0003c8-86
	for qemu-devel@nongnu.org; Fri, 17 Jun 2011 05:19:30 -0400
Received: from mx1.redhat.com ([209.132.183.28]:44814)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <kwolf@redhat.com>) id 1QXVD6-0003c0-TZ
	for qemu-devel@nongnu.org; Fri, 17 Jun 2011 05:19:29 -0400
Message-ID: <4DFB1CC4.6050903@redhat.com>
Date: Fri, 17 Jun 2011 11:22:12 +0200
From: Kevin Wolf <kwolf@redhat.com>
MIME-Version: 1.0
References: <1308075511-4745-1-git-send-email-stefanha@linux.vnet.ibm.com>	<4DF9F899.5050301@redhat.com>	<4DF9FBE4.9080300@redhat.com>	<4DFA004E.9010001@redhat.com>	<20110616145243.GB12173@amt.cnet>	<4DFB1205.9040408@redhat.com>
	<BANLkTikQB2NF=cWb3c4fJvvtD1AMgB0xqg@mail.gmail.com>
In-Reply-To: <BANLkTikQB2NF=cWb3c4fJvvtD1AMgB0xqg@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Subject: Re: [Qemu-devel] Image streaming and live block copy
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: Stefan Hajnoczi <stefanha@gmail.com>
Cc: Anthony Liguori <aliguori@us.ibm.com>, Dor Laor <dlaor@redhat.com>, Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>, jes sorensen <jes.sorensen@redhat.com>, Marcelo Tosatti <mtosatti@redhat.com>, qemu-devel@nongnu.org, Avi Kivity <avi@redhat.com>, Adam Litke <agl@us.ibm.com>

Am 17.06.2011 10:57, schrieb Stefan Hajnoczi:
> On Fri, Jun 17, 2011 at 9:36 AM, Kevin Wolf <kwolf@redhat.com> wrote:
>> By the way, we'll get problems with the colon syntax. Without -blockdev
>> we'll have to invent a new syntax, maybe with brackets:
>>
>> blkstream:[nbd:localhost]:out.qcow2
> 
> Embedding block driver options in filenames is getting worse as time
> goes on.  

Well, yes. We need -blockdev for a sane way to express complex relations
between BlockDriverStates. But then, we'll also want to have convenient
shortcuts for manual use, and that may be something like the existing
colon syntax. I really don't feel like typing three full -blockdev
parameters for qcow2 on blockdbg on raw.

> I recently tried to refactor and eliminate
> QEMUOptionParameter so that we only use QemuOpts instead of two
> different option APIs.  Part of that involves keeping separate
> per-block driver (i.e. -blockdev) options lists, which would allow us
> to pass proper options to block drivers instead of embedding them in
> the filename.

Aren't these completely independent things? QEMUOptionParameter is used
for image creation, whereas filenames are used for opening images. I
think you can change one without changing the other.

Kevin