[pve-devel] [PATCH-SERIES v8 pve-storage/qemu-server] add external qcow2 snapshot support

[Tiago Sousa]

Just adding a few things I noticed during testing, on top of what Fabian 
already mentioned:

1. VM data not wiped after deletion:
When I delete a VM and then create a new one with the same settings, the 
old OS and data are still there. It looks like the disk wasn't properly 
cleaned up.

2. Can’t roll back to older snapshots:
Rolling back only works for the latest snapshot. If I try to go back to 
an earlier one, I get this error:
TASK ERROR: can't rollback, 'test01' is not most recent snapshot on 
'vm-104-disk-0.qcow2'

3. Rollback doesn't work for LVM-thin volumes:
When trying to roll back a snapshot on an LVM-thin volume, it fails with:
can't rollback snapshot for 'raw' volume