[DRBD-user] [PATCH] xen-blkback: Switch to closed state after releasing the backing device

[Valentin Vidic]

On Fri, Sep 07, 2018 at 09:15:30AM +0200, Roger Pau Monné wrote:
> I'm not sure that's a good idea, there are a lot of backends (apart
> from blkback), and the tools won't know whether a specific backend
> supports such state or not. Also the current protocol and states are
> shared between all the Xen PV devices, so new additions should be
> considered very carefully.

Sure, I understand.

> IMO the best options are either calling vbd_free/vbd_create at proper
> stages in blkback or changing the hotplug script so it waits for the
> device to have no open clients.

Changing the block-drbd script would be ideal for me too, but I don't
think that piece of DRBD state is exposed at the moment.

-- 
Valentin