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Date: Wed, 14 Sep 2011 13:49:50 -0400
From: Stefan Berger <stefanb@linux.vnet.ibm.com>
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Subject: Re: [Qemu-devel] Design of the blobstore
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To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Anthony Liguori <aliguori@us.ibm.com>, QEMU Developers <qemu-devel@nongnu.org>, Markus Armbruster <armbru@redhat.com>

On 09/14/2011 01:40 PM, Michael S. Tsirkin wrote:
> On Wed, Sep 14, 2011 at 01:05:44PM -0400, Stefan Berger wrote:
>> qemu ... \
>>      -blobstore name=my-blobstore,drive=tpm-bs,showsize \
>>      -drive if=none,id=tpm-bs \
>>      -tpmdev libtpms,blobstore=my-blobstore,id=tpm0 \
>>      -device tpm-tis,tpmdev=tpm0
>>
>> which would result in QEMU printing to stdout:
>>
>> Blobstore tpm-store on drive with ID tpm-bs requires 83kb.
> So you envision tools parsing this freetext then?
> Seems like a step back, we are trying to move to QMP ...
I extended it first for the way I typically interact with QEMU. I do not 
use the monitor much.
>
> So with above, the raw case which we don't expect to be used often
> is easy to use, but qcow which we expect to be the main case
> is close to imposible, involving manual cut and paste
> of image size.
>
> Formatting images seems a rare enough occasion,
> that I think only using monitor command for that
> would be a better idea than a ton of new command
> line options. On top of that, let's write a
> script that run qemu, queries image size,
> creates a qcow2 file, run qemu again to format,
> all this using QMP.
Creates the qcow2 using 'qemu-img' I suppose.

    Stefan
> WRT 'format and run in one go' I strongly disagree with it.
> It's just too easy to shoot oneself in the foot.