Re: [Qemu-devel] [PATCH 4/6] snapshot: implemention of common API to take snapshots

[Dietmar Maurer]

>   OK, I think underlying storage is another level of issue, just wondering 
> what
> this patch miss to stop you use external tool, did you called a LVM/nexenta C
> API in previous patch?

The trick is to do thing step by step

1.) save state
2.) create internal snapshots
3.) call external tools to create snapshots
...

1 and 2 is done inside qemu, 3 is done from the management tool.

You use qmp_transactions, which makes that impossible.