linux-kernel - Re: [PATCH] xenbus: advertize control feature flags

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Date:   Mon, 10 Oct 2016 11:11:04 +0200
From:   Juergen Gross <jgross@...e.com>
To:     Paul Durrant <paul.durrant@...rix.com>,
        linux-kernel@...r.kernel.org, xen-devel@...ts.xenproject.org
Cc:     Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        David Vrabel <david.vrabel@...rix.com>
Subject: Re: [PATCH] xenbus: advertize control feature flags

On 10/10/16 09:43, Paul Durrant wrote:
> The Xen docs specify several flags which a guest can set to advertize
> which values of the xenstore control/shutdown key it will recognize.
> This patch adds code to write all the relevant feature-flag keys.
> 
> Signed-off-by: Paul Durrant <paul.durrant@...rix.com>
> Cc: Boris Ostrovsky <boris.ostrovsky@...cle.com>
> Cc: David Vrabel <david.vrabel@...rix.com>
> Cc: Juergen Gross <jgross@...e.com>
> ---
>  drivers/xen/manage.c | 45 +++++++++++++++++++++++++++++++++++----------
>  1 file changed, 35 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c
> index e12bd36..86cf57c 100644
> --- a/drivers/xen/manage.c
> +++ b/drivers/xen/manage.c
> @@ -170,6 +170,7 @@ out:
>  struct shutdown_handler {
>  	const char *command;
>  	void (*cb)(void);
> +	bool flag;
>  };
>  
>  static int poweroff_nb(struct notifier_block *cb, unsigned long code, void *unused)
> @@ -206,21 +207,22 @@ static void do_reboot(void)
>  	ctrl_alt_del();
>  }
>  
> +static struct shutdown_handler shutdown_handlers[] = {
> +	{ "poweroff", do_poweroff, true },
> +	{ "halt", do_poweroff, true },
> +	{ "reboot", do_reboot, false },

I think you meant to set the flag to "false" for halt and "true" for
reboot, no?


Juergen