Re: [PATCH 8/8] xfs/178: fix mkfs success test

["Darrick J. Wong" <djwong@kernel.org>]

On Sun, May 16, 2021 at 11:54:30PM +0800, Eryu Guan wrote:
> On Tue, May 11, 2021 at 07:02:24PM -0700, Darrick J. Wong wrote:
> > From: Darrick J. Wong <djwong@kernel.org>
> > 
> > Fix the obviously incorrect code here that wants to fail the test if
> > mkfs doesn't succeed.  The return value ("$?") is always the status of
> > the /last/ command in the pipe.  Change the checker to _notrun so that
> > we don't leave the scratch check files around.
> > 
> > Signed-off-by: Darrick J. Wong <djwong@kernel.org>
> > ---
> >  tests/xfs/178 |    4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> > 
> > 
> > diff --git a/tests/xfs/178 b/tests/xfs/178
> > index a24ef50c..bf72e640 100755
> > --- a/tests/xfs/178
> > +++ b/tests/xfs/178
> > @@ -57,8 +57,8 @@ _supported_fs xfs
> >  #             fix filesystem, new mkfs.xfs will be fine.
> >  
> >  _require_scratch
> > -_scratch_mkfs_xfs | _filter_mkfs 2>$tmp.mkfs \
> > -        || _fail "mkfs failed!"
> > +_scratch_mkfs_xfs | _filter_mkfs 2>$tmp.mkfs
> > +test "${PIPESTATUS[0]}" -eq 0 || _notrun "mkfs failed!"
> 
> I still don't understand why changing this to _notrun, shouldn't creating a
> default filesystem should always pass?

It will, unless you've injected a malicious mkfs.xfs to make sure
constructions like these actually work.

> and fail the test if mkfs failed?

Yeah, you're right, it /should/ fail.  I'll leave it alone then.

--D

> 
> Thanks,
> Eryu
> 
> >  
> >  # By executing the followint tmp file, will get on the mkfs options stored in
> >  # variables
> >