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Re: [Qemu-devel] [RFC] introduce a dynamic library to expose qemu block

From: Stefan Hajnoczi
Subject: Re: [Qemu-devel] [RFC] introduce a dynamic library to expose qemu block API
Date: Fri, 13 Jul 2012 10:13:15 +0100
User-agent: Mutt/1.5.21 (2010-09-15)

On Mon, Jul 09, 2012 at 04:36:07PM +0200, Christoph Hellwig wrote:
> On Mon, Jul 09, 2012 at 04:54:08PM +0800, Wenchao Xia wrote:
> > Hi, Paolo and folks,
> >   qemu have good capabilities to access different virtual disks, I want
> > to expose its block layer API to let 3rd party program linked in, such
> > as management stack or block tools, to access images data directly.
> > 
> > Following is the objects:
> >   (1) API to write/read block device at offset.
> >   (2) Determine the image type,qcow2/qed/raw
> >   (3) Determine which blocks are allocated.
> >   (4) Determine backing file.
> Sounds like you want a procedural interface for that.  At least for (1)
> I have patches I'll submit soon to add qemu img read/write commands.

How is that different from all the qemu-io commands?


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