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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