Re: [PATCH] xen-block: treat XenbusStateUnknown the same as XenbusStateClosed

[Anthony PERARD]

On Wed, Sep 18, 2019 at 12:57:02PM +0100, Paul Durrant wrote:
> When a frontend gracefully disconnects from an offline backend, it will
> set its own state to XenbusStateClosed. The code in xen-block.c correctly
> deals with this and sets the backend into XenbusStateClosed. Unfortunately
> it is possible for toolstack to actually delete the frontend area
> before the state key has been read, leading to an apparent frontend state
> of XenbusStateUnknown. This prevents the backend state from transitioning
> to XenbusStateClosed and hence leaves it limbo.
> 
> This patch simply treats a frontend state of XenbusStateUnknown the same
> as XenbusStateClosed, which will unblock the backend in these circumstances.
> 
> Reported-by: Mark Syms <address@hidden>
> Signed-off-by: Paul Durrant <address@hidden>

Acked-by: Anthony PERARD <address@hidden>

Thanks,

-- 
Anthony PERARD