Re: [Xen-devel] [PATCH] libxl: ignore run_hotplug_scripts setting when backend_domid!=0

[George Dunlap <george.dunlap@xxxxxxxxxxxxx>]

On 04/07/13 12:39, Roger Pau Monné wrote:
> On 04/07/13 12:42, George Dunlap wrote:
> > On Tue, Apr 9, 2013 at 9:49 AM, Marek Marczykowski
> > <marmarek@xxxxxxxxxxxxxxxxxxxxxx> wrote:
> > > Instead of forcing the user to change run_hotplug_scripts setting
> > > globally, just ignore it for backends outside of dom0.
> > >
> > > Signed-off-by: Marek Marczykowski <marmarek@xxxxxxxxxxxxxxxxxxxxxx>
> > This seems like a good idea -- Roger / Ian, any thoughts?
> We already have this behaviour in libxl (see libxl_device.c:device_hotplug):
>
> /*
>   * If device is attached from a driver domain don't try to execute
>   * hotplug scripts
>   */
> if (aodev->dev->backend_domid != LIBXL_TOOLSTACK_DOMID)
>      goto out;
>
> This was introduced by commit 05bfd984dfe7014f1f5ea1133608b9bab589c120
But you still get an error on domain creation if you actually set a 
non-dom0 backend and run_hotplug_scripts is set; so you can't actually 
run in "mixed mode" anyway.  This patch should, I think, enable you to 
have libxl run the scripts in dom0, but udev run them in domu.
 -George

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