Re: [Xen-devel] [PATCH v2 02/10] libxl: create a local xenstore libxl and device-model dir for guests

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Roger Pau Monne writes ("[PATCH v2 02/10] libxl: create a local xenstore libxl 
and device-model dir for guests"):
> If libxl is executed inside a guest domain it needs write access to
> the local libxl xenstore dir (/local/<domid>/libxl) to store internal
> data. This also applies to Qemu which needs a
> /local/<domid>/device-model xenstore directory.
>
> This patch creates the mentioned directories for each guest launched
> from libxl.
...
> diff --git a/docs/man/xl.cfg.pod.5 b/docs/man/xl.cfg.pod.5
> index d2d8921..d260895 100644
> --- a/docs/man/xl.cfg.pod.5
> +++ b/docs/man/xl.cfg.pod.5
> @@ -307,6 +307,11 @@ which are incompatible with migration. Currently this is 
> limited to
>  enabling the invariant TSC feature flag in cpuid results when TSC is
>  not emulated.
>  
> +=item B<driver_domain=BOOLEAN>
> +
> +Specify that this domain is a driver domain. This enables certain
> +features needed in order to run a driver domain.
> +

"Certain features" is a bit vague.  The definition of "driver domain"
could be expaneded perhaps.  At the very least the manpage should
explain whether a domain gets additional capabilities as a result of
this option.  You should also say why not to set it always.

Is it the case that setting this option allows a guest to pretend to
have backends for other guests ?

Ian.

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