On Fri, Sep 07, 2018 at 09:23:19AM +0200, Valentin Vidic wrote:
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.
Then I'm afraid you will have to look into the vbd_free/create fix.
Thanks, Roger.