tests/generic/480

#! /bin/bash
# FSQA Test No. 480
#
# Test that if we have a file with two hard links in the same parent directory,
# then remove of the links, create a new file in the same parent directory and
# with the name of the link removed, fsync the new file and have a power loss,
# mounting the filesystem succeeds.
#
#-----------------------------------------------------------------------
#
# Copyright (C) 2018 SUSE Linux Products GmbH. All Rights Reserved.
# Author: Filipe Manana <fdmanana@suse.com>
#
# 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"
tmp=/tmp/$$
status=1	# failure is the default!
trap "_cleanup; exit \$status" 0 1 2 3 15

_cleanup()
{
	_cleanup_flakey
	cd /
	rm -f $tmp.*
}

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

# real QA test starts here
_supported_fs generic
_supported_os Linux
_require_scratch
_require_dm_target flakey

rm -f $seqres.full

_scratch_mkfs >>$seqres.full 2>&1
_require_metadata_journaling $SCRATCH_DEV
_init_flakey
_mount_flakey

mkdir $SCRATCH_MNT/testdir
touch $SCRATCH_MNT/testdir/foo
ln $SCRATCH_MNT/testdir/foo $SCRATCH_MNT/testdir/bar

# Make sure everything done so far is durably persisted.
sync

# Now remove of the links of our file and create a new file with the same name
# and in the same parent directory, and finally fsync this new file.
unlink $SCRATCH_MNT/testdir/bar
touch $SCRATCH_MNT/testdir/bar
$XFS_IO_PROG -c "fsync" $SCRATCH_MNT/testdir/bar

# Simulate a power failure and mount the filesystem to check that replaying the
# the fsync log/journal succeeds, that is the mount operation does not fail.
_flakey_drop_and_remount

_unmount_flakey
_cleanup_flakey

echo "Silence is golden"
status=0
exit