linux-kernel - Re: [PATCH v2] drivers/cdrom: improved ioctl for media change detection

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Date:   Fri, 10 Sep 2021 08:59:56 +0100
From:   Phillip Potter <phil@...lpotter.co.uk>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     Lukas Prediger <lumip@...ip.de>, axboe@...nel.dk,
        hch@...radead.org, linux-kernel@...r.kernel.org,
        linux-block@...r.kernel.org
Subject: Re: [PATCH v2] drivers/cdrom: improved ioctl for media change
 detection

On Thu, Sep 09, 2021 at 06:25:35PM -0700, Randy Dunlap wrote:
> I have no problem with Jens's suggestion.  It would look more like this:
> 
> +{
> +	__s64	last_media_change;	/* Timestamp of the last detected media
> +					 * change in ms. May be set by caller, updated
> +					 * upon successful return of ioctl.
> +					 */
> +	__u64	media_flags;		/* various <struct> flags */
> 
> #define MEDIA_CHANGED			0x1 /* Set to 1 by ioctl if last detected media */
> /* other bits of media_flags available for future use */
> 
> 
> and not having __u64 has_changed;
> which is overkill for a flag.
> 
> -- 
> ~Randy
> 

Yeah I like this, good idea. Thanks.

Regards,
Phil