Re: [PATCH] xfs: compat_xfs_bstat does not have forkoff

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On Mon, Sep 29, 2014 at 03:43:18AM -0700, Christoph Hellwig wrote:
> On Mon, Sep 29, 2014 at 11:41:26AM +1000, Dave Chinner wrote:
> > From: Dave Chinner <dchinner@xxxxxxxxxx>
> > 
> > struct compat_xfs_bstat is missing the di_forkoff field and so does
> > not fully translate the structure correctly. Fix it.
> > 
> > Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
> > ---
> >  fs/xfs/xfs_ioctl32.c | 2 ++
> >  fs/xfs/xfs_ioctl32.h | 3 ++-
> >  2 files changed, 4 insertions(+), 1 deletion(-)
> 
> Looks good,
> 
> Reviewed-by: Christoph Hellwig <hch@xxxxxx>
> 
> Any chance to get an xfstests test that verifies the forkoff value?
> Even if it would only reproduce this bug when running 32-bit userspace
> on a 64-bit kernel it would be useful I think.

There are already xfs_fsr tests that are dependent on forkoff being
set to correctly defrag a file successfully. The fact that nobody
has noticed that these fail tends to imply nobody runs xfstests with
a 32 bit userspace on 64 bit kernels....

Cheers,

Dave.
-- 
Dave Chinner
david@xxxxxxxxxxxxx

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