From: Hugh Dickins <hughd@google.com>
To: Allison Henderson <achender@linux.vnet.ibm.com>
Cc: Dave Chinner <david@fromorbit.com>, linux-ext4@vger.kernel.org
Subject: Re: punch-hole should go beyond i_size
Date: Thu, 12 Jan 2012 16:21:30 -0800 (PST) [thread overview]
Message-ID: <alpine.LSU.2.00.1201121617320.1541@eggly.anvils> (raw)
In-Reply-To: <4F0F08F6.2000205@linux.vnet.ibm.com>
On Thu, 12 Jan 2012, Allison Henderson wrote:
> On 01/11/2012 07:55 PM, Dave Chinner wrote:
> > On Wed, Jan 11, 2012 at 05:02:12PM -0800, Hugh Dickins wrote:
> > >
> > > ext4_ext_punch_hole() contains /* No need to punch hole beyond i_size */
> > > early return, and trimming to i_size below, but forgets that the other
> > > variety of fallocate(), with FALLOC_FL_KEEP_SIZE set, may have allocated
> > > blocks beyond i_size. They can be removed with ftruncate(), but it is
> > > unexpected for fallocate() not to undo its own work, and xfs does so.
> >
> > I'm pretty sure that's a bug as XFS allows punching holes in extents
> > beyond EOF.
>
> Oh I see, I'll take a look at it, I think it will be ok to just take out the
> early return. Thx!
Thanks. And I've just noticed another, very easily fixed, error:
I believe those -ENOTSUPPs in ext4_punch_hole() should be -EOPNOTSUPPs.
Hugh
next prev parent reply other threads:[~2012-01-13 0:21 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-12 1:02 punch-hole should go beyond i_size Hugh Dickins
2012-01-12 2:55 ` Dave Chinner
2012-01-12 16:23 ` Allison Henderson
2012-01-13 0:21 ` Hugh Dickins [this message]
2012-01-13 3:18 ` Allison Henderson
2012-05-13 21:13 ` Hugh Dickins
2012-05-15 21:36 ` Allison Henderson
2012-05-15 22:38 ` Hugh Dickins
2012-05-16 6:14 ` Lukáš Czerner
2012-05-16 18:09 ` Hugh Dickins
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