Re: [Xen-devel] [PATCH RFC 06/12] libxl: set correct permissions for the full backend path

[Roger Pau Monnà <roger.pau@xxxxxxxxxx>]

On 25/09/13 15:57, Ian Campbell wrote:
> On Mon, 2013-09-23 at 12:30 +0200, Roger Pau Monne wrote:
>> The backend path should be fully owned by the domain where it resides.
> 
> I can see why /local/domain/<domid>backends/<type>/<id> would need to be
> owned by the backend dom, but why
> do /local/domain/<domid>backends/<type>/, /local/domain/<domid>backends/, etc 
> need to be?

The path /local/domain/<domid>backends/<type>/<guest_domid>/<id> is
already owned by the driver domain, the problem is that if the driver
domain has to perform the clean up of this path it should be able to
fully remove it, otherwise we are leaving empty directories around in
xenstore (backend/<type>/<guest_domid> and so).

And performing the clean up from the toolstack domain is not that easy,
we will have to add a way to signal the toolstack domain that the driver
domain has finished the disconnection and the directory can be cleaned.


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