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Re: [Qemu-devel] [PATCH 3/3] cow: use qemu block API
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From: |
Christoph Hellwig |
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Subject: |
Re: [Qemu-devel] [PATCH 3/3] cow: use qemu block API |
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Date: |
Tue, 8 Jun 2010 10:52:34 +0200 |
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User-agent: |
Mutt/1.3.28i |
On Mon, Jun 07, 2010 at 02:27:40PM +0200, Markus Armbruster wrote:
> Christoph Hellwig <address@hidden> writes:
>
> > Use bdrv_pwrite to access the backing device instead of pread, and
> > convert the driver to implementing the bdrv_open method which gives
> > it an already opened BlockDriverState for the underlying device.
> >
> > Signed-off-by: Christoph Hellwig <address@hidden>
>
> In my (admittedly limited) understanding, we need this for sane protocol
> handling in -blockdev & friends.
Yes - not just in -blockdev but also in general.