[PATCH v2 3/3] qapi: deprecate drive-backup

[John Snow]

On 5/6/21 5:57 AM, Kashyap Chamarthy wrote:
> TODO: We also need to deprecate drive-backup transaction action..
> But union members in QAPI doesn't support 'deprecated' feature. I tried
> to dig a bit, but failed :/ Markus, could you please help with it? At
> least by advice?

Oho, I see.

OK, I'm not Markus, but I've been getting into lots of trouble in the 
QAPI generator lately, so let me see if I can help get you started...

https://gitlab.com/jsnow/qemu/-/commits/hack-deprecate-union-branches/

Here's a quick hack that might expose that feature. I suppose we can 
discuss this with Markus and turn these into real patches if that's the 
direction we wanna head.

--js