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Re: [Qemu-devel] [PATCH 3/3] cow: use qemu block API


From: Markus Armbruster
Subject: Re: [Qemu-devel] [PATCH 3/3] cow: use qemu block API
Date: Mon, 07 Jun 2010 14:27:40 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux)

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.



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