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Re: [Qemu-block] [libvirt] [libvirt RFC PATCH 00/10] Add support for qem

From: Eric Blake
Subject: Re: [Qemu-block] [libvirt] [libvirt RFC PATCH 00/10] Add support for qemu's JSON pseudo'protocol for backing store
Date: Fri, 15 Jul 2016 13:11:16 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0

On 07/15/2016 07:49 AM, Daniel P. Berrange wrote:
> On Fri, Jul 15, 2016 at 03:46:33PM +0200, Peter Krempa wrote:
>> Libvirt didn't handle this for a long time and VMs with such config would not
>> start we should implement it.
>> Using JSON is basically the only option to specify advanced configuration 
>> for a
>> backing file.
>> Field names were taken from qemu's source since there isn't really
>> documentation for this.
> Actually, this syntax is formally specified via QEMU   QAPI schema
> language. In particular for block device options see 
> $QEMU/qapi/block-core.json

Except that it is incomplete; as long as BlockdevOptions doesn't cover
every driver, such as NBD, gluster, and sheepdog, there are still some
und(er)ocumented aspects.

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

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