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[Qemu-block] Creating snapshots with specific runtime options
From: |
Alberto Garcia |
Subject: |
[Qemu-block] Creating snapshots with specific runtime options |
Date: |
Tue, 25 Aug 2015 16:57:53 +0300 |
User-agent: |
Mutt/1.5.23 (2014-03-12) |
As far as I can see there's no way to create a snapshot and either
a) inherit the runtime options from the original image
b) specify a new set of options
This comment in external_snapshot_prepare() before calling bdrv_open()
suggests that the problem is known but the discussion was postponed.
/* TODO Inherit bs->options or only take explicit options with an
* extended QMP command? */
I would like to retake this and make it possible. I discussed it
briefly with Stefan on IRC and he said that Kevin might have some
ideas.
In principle extending the QMP command sounds as simple as adding
'options': 'BlockdevOptions' to 'blockdev-snapshot-sync', but it's
surely more complicated than that :) Is the 'BlockdevOptions' API even
stable?
Berto
- [Qemu-block] Creating snapshots with specific runtime options,
Alberto Garcia <=