Re: [PATCH v4 2/3] xfs: basic functionality test for shrinking free space in the last AG

[Gao Xiang <hsiangkao@redhat.com>]

On Mon, May 10, 2021 at 11:01:47AM -0700, Darrick J. Wong wrote:
> On Fri, Apr 02, 2021 at 05:49:36PM +0800, Gao Xiang wrote:
> > Add basic test to make sure the functionality works as expected.
> > 
> > Signed-off-by: Gao Xiang <hsiangkao@redhat.com>
> > ---
> >  tests/xfs/990     | 73 +++++++++++++++++++++++++++++++++++++++++++++++
> >  tests/xfs/990.out | 12 ++++++++
> >  tests/xfs/group   |  1 +
> >  3 files changed, 86 insertions(+)
> >  create mode 100755 tests/xfs/990
> >  create mode 100644 tests/xfs/990.out
> > 
> > diff --git a/tests/xfs/990 b/tests/xfs/990
> > new file mode 100755
> > index 00000000..322b09e1
> > --- /dev/null
> > +++ b/tests/xfs/990
> > @@ -0,0 +1,73 @@
> > +#! /bin/bash
> > +# SPDX-License-Identifier: GPL-2.0
> > +# Copyright (c) 2021 Red Hat, Inc.  All Rights Reserved.
> > +#
> > +# FS QA Test 990
> > +#
> > +# XFS shrinkfs basic functionality test
> > +#
> > +# This test attempts to shrink with a small size (512K), half AG size and
> > +# an out-of-bound size (agsize + 1) to observe if it works as expected.
> > +#
> > +seq=`basename $0`
> > +seqres=$RESULT_DIR/$seq
> > +echo "QA output created by $seq"
> > +
> > +here=`pwd`
> > +tmp=/tmp/$$
> > +status=1    # failure is the default!
> > +trap "rm -f $tmp.*; exit \$status" 0 1 2 3 15
> > +
> > +# get standard environment, filters and checks
> > +. ./common/rc
> > +. ./common/filter
> > +
> > +test_shrink()
> > +{
> > +	$XFS_GROWFS_PROG -D"$1" $SCRATCH_MNT >> $seqres.full 2>&1
> > +	ret=$?
> > +
> > +	_scratch_unmount
> > +	_check_scratch_fs
> > +	_scratch_mount
> > +
> > +	$XFS_INFO_PROG $SCRATCH_MNT 2>&1 | _filter_mkfs 2>$tmp.growfs >/dev/null
> > +	. $tmp.growfs
> > +	[ $ret -eq 0 -a $1 -eq $dblocks ]
> > +}
> > +
> > +# real QA test starts here
> > +_supported_fs xfs
> > +_require_xfs_scratch_shrink
> > +
> > +rm -f $seqres.full
> > +echo "Format and mount"
> > +
> > +# agcount = 1 is forbidden on purpose, and need to ensure shrinking to
> > +# 2 AGs isn't fensible yet. So agcount = 3 is the minimum number now.
> 
> s/fensible/feasible/
> 
> > +_scratch_mkfs -dsize="$((512 * 1024 * 1024))" -dagcount=3 2>&1 | \
> > +	tee -a $seqres.full | _filter_mkfs 2>$tmp.mkfs
> > +. $tmp.mkfs
> > +t_dblocks=$dblocks
> > +_scratch_mount >> $seqres.full
> > +
> > +echo "Shrink fs (small size)"
> > +test_shrink $((t_dblocks-512*1024/dbsize)) || \
> > +	_fail "Shrink fs (small size) failure"
> > +
> > +echo "Shrink fs (half AG)"
> > +test_shrink $((t_dblocks-agsize/2)) || \
> > +	_fail "Shrink fs (half AG) failure"
> > +
> > +echo "Shrink fs (out-of-bound)"
> > +test_shrink $((t_dblocks-agsize-1)) && \
> > +	_fail "Shrink fs (out-of-bound) failure"
> > +[ $dblocks -ne $((t_dblocks-agsize/2)) ] && \
> > +	_fail "dblocks changed after shrinking failure"
> 
> Can these be echo statements, since the diff in golden output will trip
> anyway?

Ok, will update.

Thanks,
Gao Xiang

> 
> --D