Re: [PATCH] fstests: be compatible with older mkfs.xfs which has no v5 support

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On Thu, May 14, 2015 at 12:14:06PM +1000, Dave Chinner wrote:
> On Sun, May 10, 2015 at 07:50:43PM +0800, Eryu Guan wrote:
> > With the change to CRCs by default, some tests are updated to call mkfs
> > with "-m crc=0" option directly, and this breaks testings on older
> > distros where mkfs.xfs doesn't have crc support.
> > 
> > Introduce a new variable to tell if mkfs.xfs supports v5 xfs and do
> > tweaks in _scratch_mkfs_xfs_opts() based on it.
> > 
> > Signed-off-by: Eryu Guan <eguan@xxxxxxxxxx>
> > ---
> > 
> > This is based on Dave's commit "filter: inode size output of mkfs.xfs can change"
> > 
> > Tested on upstream kernel with upstream xfsprogs(v5 as default) and on RHEL7(v4
> > as default) and on RHEL6(no v5 support), all seem fine, no failures caused by
> > crc options.
> > 
> >  check         | 10 +++++++++-
> >  common/rc     |  5 +++++
> >  tests/xfs/073 |  4 +++-
> >  3 files changed, 17 insertions(+), 2 deletions(-)
> > 
> > diff --git a/check b/check
> > index 4fa96ed..568c05b 100755
> > --- a/check
> > +++ b/check
> > @@ -505,9 +505,17 @@ for section in $HOST_OPTIONS_SECTIONS; do
> >  
> >  	if [ ! -z "$SCRATCH_DEV" ]; then
> >  	  umount $SCRATCH_DEV 2>/dev/null
> > +
> > +	  # check if mkfs.xfs supports v5 xfs
> > +	  if [ "$FSTYP" == "xfs" ]; then
> > +		export XFS_MKFS_HAS_NO_META_SUPPORT=""
> > +		if ! _scratch_mkfs -m crc=0 >/dev/null 2>&1; then
> > +			export XFS_MKFS_HAS_NO_META_SUPPORT=true
> > +		fi
> > +	  fi
> > +
> 
> Shouldn't this be somewhere in common/config, not in the check
> script itself?

When sourcing common/config, SCRATCH_DEV has not been validated, and
things get messier when config sections are used.

In check here, we have done all the validations and preparations,
everything is ready to go.

> 
> Also, _scratch_mkfs_xfs_supported already exists for checking
> various options exist in mkfs.xfs....

I missed it, it's better than _scratch_mkfs, thanks! But it's not
available in common/config if we want to do the check there.

> 
> > diff --git a/tests/xfs/073 b/tests/xfs/073
> > index 45a3fdf..acac8b8 100755
> > --- a/tests/xfs/073
> > +++ b/tests/xfs/073
> > @@ -156,7 +156,9 @@ _verify_copy $imgs.image $SCRATCH_DEV $SCRATCH_MNT
> >  
> >  echo 
> >  echo === copying scratch device to single target, large ro device
> > -${MKFS_XFS_PROG} -m crc=0 -dfile,name=$imgs.source,size=100g | _filter_mkfs 2>/dev/null
> > +mkfs_crc_opts="-m crc=0"
> > +[ -n "$XFS_MKFS_HAS_NO_META_SUPPORT" ] && mkfs_crc_opts=""
> > +${MKFS_XFS_PROG} $mkfs_crc_opts -dfile,name=$imgs.source,size=100g | _filter_mkfs 2>/dev/null
> 
> This is kinda messy. Just use if/then/else, it's much easy to read.

OK.

Thanks for the review!

Eryu
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