[RFC PATCH v2 2/3] xfs: basic functionality test for shrinking free space in the last AG

[Gao Xiang <hsiangkao@redhat.com>]

Add basic test to make sure the functionality works as expected.

Signed-off-by: Gao Xiang <hsiangkao@redhat.com>
---
 tests/xfs/990     | 59 +++++++++++++++++++++++++++++++++++++++++++++++
 tests/xfs/990.out | 12 ++++++++++
 tests/xfs/group   |  1 +
 3 files changed, 72 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..551c4784
--- /dev/null
+++ b/tests/xfs/990
@@ -0,0 +1,59 @@
+#! /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
+
+# real QA test starts here
+_supported_fs xfs
+_require_xfs_shrink
+
+rm -f $seqres.full
+echo "Format and mount"
+size="$((512 * 1024 * 1024))"
+_scratch_mkfs -dsize=$size -dagcount=3 2>&1 | \
+	tee -a $seqres.full | _filter_mkfs 2>$tmp.mkfs
+. $tmp.mkfs
+_scratch_mount >> $seqres.full 2>&1
+
+echo "Shrink fs (small size)"
+$XFS_GROWFS_PROG -D $((dblocks-512*1024/dbsize)) $SCRATCH_MNT \
+	>> $seqres.full 2>&1 || echo failure
+_scratch_cycle_mount
+
+echo "Shrink fs (half AG)"
+$XFS_GROWFS_PROG -D $((dblocks-agsize/2)) $SCRATCH_MNT \
+	>> $seqres.full 2>&1 || echo failure
+_scratch_cycle_mount
+
+echo "Shrink fs (out-of-bound)"
+$XFS_GROWFS_PROG -D $((dblocks-agsize-1)) $SCRATCH_MNT \
+	>> $seqres.full 2>&1 && echo failure
+_scratch_cycle_mount
+
+$XFS_INFO_PROG $SCRATCH_MNT >> $seqres.full
+
+_scratch_unmount
+echo "*** done"
+
+# success, all done
+status=0
+exit
diff --git a/tests/xfs/990.out b/tests/xfs/990.out
new file mode 100644
index 00000000..812f89ef
--- /dev/null
+++ b/tests/xfs/990.out
@@ -0,0 +1,12 @@
+QA output created by 990
+Format and mount
+meta-data=DDEV isize=XXX agcount=N, agsize=XXX blks
+data     = bsize=XXX blocks=XXX, imaxpct=PCT
+         = sunit=XXX swidth=XXX, unwritten=X
+naming   =VERN bsize=XXX
+log      =LDEV bsize=XXX blocks=XXX
+realtime =RDEV extsz=XXX blocks=XXX, rtextents=XXX
+Shrink fs (small size)
+Shrink fs (half AG)
+Shrink fs (out-of-bound)
+*** done
diff --git a/tests/xfs/group b/tests/xfs/group
index e861cec9..a7981b67 100644
--- a/tests/xfs/group
+++ b/tests/xfs/group
@@ -525,3 +525,4 @@
 525 auto quick mkfs
 526 auto quick mkfs
 527 auto quick quota
+990 auto quick growfs
-- 
2.27.0