linux-kernel - Re: [PATCH 1/3] VFS/ioctl: Add punching-hole support to ioctl().

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Message-ID: <20110401003450.GD7484@dhcp231-156.rdu.redhat.com>
Date:	Thu, 31 Mar 2011 20:34:50 -0400
From:	Josef Bacik <josef@...hat.com>
To:	Josef Bacik <josef@...hat.com>,
	Sunil Mushran <sunil.mushran@...cle.com>,
	Tristan Ye <tristan.ye@...cle.com>, ocfs2-devel@....oracle.com,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-btrfs@...r.kernel.org, chris.mason@...cle.com, tm@....ma
Subject: Re: [PATCH 1/3] VFS/ioctl: Add punching-hole support to ioctl().

On Thu, Mar 31, 2011 at 04:44:55PM -0700, Joel Becker wrote:
> On Thu, Mar 31, 2011 at 06:56:18PM -0400, Josef Bacik wrote:
> > On Thu, Mar 31, 2011 at 02:14:43PM -0700, Sunil Mushran wrote:
> > > Frankly I see no point extending the ioctl interface when we have
> > > a syscall interface.
> > >
> > 
> > I'd even go so far as to say we could probably axe the xfs and ocfs2 ioctls
> > since we have the fallocate interface :).  Thanks,
> 
> 	These ioctls are in long use.  Granted, it is for the small
> subset of users that know xfs and ocfs2 can do this, but still.
> <venkman>Breaking userspace is *bad*.</venkman>

Yeah I wasn't serious, though I do wish there was a way to mark these sort of
interfaces deprecated to give us a path to retire old interfaces.

> 	More interesting would be to bring the ioctls up to generic code
> and have them backended by fallocate.  I'm not sure they map without
> looking deeper, but it's at least an idea.
> 

I just did a cursory look and it seems like that would work out ok.  Thanks,

Josef
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