Re: [Xen-devel] [PATCH net-next v2 2/2] xen-netback: handle frontends that fail to transition through Closing

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

> -----Original Message-----
> From: Bastian Blank [mailto:bastian@xxxxxxxxxxxx]
> Sent: 20 September 2013 17:15
> To: Paul Durrant
> Cc: netdev@xxxxxxxxxxxxxxx; xen-devel@xxxxxxxxxxxxx; Wei Liu; David Vrabel;
> Ian Campbell
> Subject: Re: [Xen-devel] [PATCH net-next v2 2/2] xen-netback: handle
> frontends that fail to transition through Closing
> 
> On Fri, Sep 20, 2013 at 02:57:40PM +0100, Paul Durrant wrote:
> > Some old Windows frontends fail to transition through the xenbus Closing
> > state and move directly from Connected to Closed. Handle this case
> properly.
> 
> What happens in this case? Are there other state changes that will do
> unwanted things?
> 

Hmm, now you mention it I suspect a transition directly to an unknown state may 
also not do the right thing. Perhaps it would be better to go straight to a 
more robust state model as suggested by David Vrabel.

  Paul
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