tests/xfs/447

#! /bin/bash
# FS QA Test 447
#
# Exercise mount vs superblock shrinker races.
#
#-----------------------------------------------------------------------
# Copyright (c) 2018 Red Hat, Inc.  All Rights Reserved.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write the Free Software Foundation,
# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
#-----------------------------------------------------------------------
#

seq=`basename $0`
seqres=$RESULT_DIR/$seq
echo "QA output created by $seq"

here=`pwd`
tmp=/tmp/$$
status=1	# failure is the default!
trap "_cleanup; exit \$status" 0 1 2 3 15

_cleanup()
{
	cd /
	rm -f $tmp.*
	echo 0 > /sys/fs/xfs/debug/mount_delay
}

# get standard environment, filters and checks
. ./common/rc
. ./common/filter

# remove previous $seqres.full before test
rm -f $seqres.full

# real QA test starts here

_supported_fs xfs
_supported_os Linux

_require_scratch
_require_xfs_sysfs debug/mount_delay

echo "Silence is golden"

_scratch_mkfs > $seqres.full 2>&1
_scratch_mount

$XFS_IO_PROG -fxc "pwrite 0 4k" -c fsync \
		-c "shutdown" $SCRATCH_MNT/foo 2>&1 > /dev/null

_scratch_unmount

echo 30 > /sys/fs/xfs/debug/mount_delay
_scratch_mount
echo 0 > /sys/fs/xfs/debug/mount_delay
_scratch_unmount

# success, all done
status=0
exit