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Re: [Qemu-devel] [PATCH 0/3] Support streaming to an intermediate layer

From: Eric Blake
Subject: Re: [Qemu-devel] [PATCH 0/3] Support streaming to an intermediate layer
Date: Fri, 20 Feb 2015 10:34:58 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0

On 02/20/2015 06:53 AM, Alberto Garcia wrote:
> Hello,
> I added support to the Block Stream API for streaming to an
> intermediate layer.
> I followed the proposed API from the wiki, which simply adds an
> additional 'top' parameter to block-stream specifying the image that
> data is written to:

How does one learn whether qemu is new enough to support this mode?
Until we add QMP introspection, learning whether an optional parameter
exists requires attempting the command and seeing a different error
depending on whether the argument is recognized.

Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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