From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ben Myers <bpm@sgi.com>
Subject: Re: [PATCH 14/16] xfs: rename XFS_IOC_FSGEOM to XFS_IOC_FSGEOM_V2
Date: Mon, 6 Oct 2014 15:38:59 -0500
Message-ID: <20141006203859.GO1865@sgi.com>
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Cc: linux-fsdevel@vger.kernel.org, olaf@sgi.com, xfs@oss.sgi.com
To: Dave Chinner <david@fromorbit.com>
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On Tue, Oct 07, 2014 at 07:33:00AM +1100, Dave Chinner wrote:
> On Fri, Oct 03, 2014 at 05:04:35PM -0500, Ben Myers wrote:
> > From: Ben Myers <bpm@sgi.com>
> > 
> > We'll be creating a new versioned XFS_IOC_FSGEOMETRY ioctl and structure
> > so rename the current revision to _V2.
> 
> Urk, no.
> 
> This will result in older applications picking up the new ioctl when
> they are rebuilt without having explicit support for the new ioctl.
> 
> Just create a new ioctl with a new name and modify applications to
> use it. If the kernel does not support the new ioctl, then fall back
> to the old one in userspace.

D'oh.  Yeah, ok.

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