#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2018 SUSE Linux Products GmbH. All Rights Reserved.
#
# FS QA Test No. 526
#
# Test that after a combination of file renames, linking and creating a new file
# with the old name of a renamed file, if we fsync the new file, after a power
# failure we are able to mount the filesystem and all file names correspond to
# the correct inodes.
#
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_hardlinks
_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
echo -n "foo" > $SCRATCH_MNT/testdir/fname1
echo -n "hello" > $SCRATCH_MNT/testdir/fname2

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

# Rename and link files such that one new name corresponds to the name of
# another renamed file and one new file has the old name of one of the renamed
# files. Then fsync only the new file.
mv $SCRATCH_MNT/testdir/fname1 $SCRATCH_MNT/testdir/fname3
mv $SCRATCH_MNT/testdir/fname2 $SCRATCH_MNT/testdir/fname4
ln $SCRATCH_MNT/testdir/fname3 $SCRATCH_MNT/testdir/fname2
echo -n "bar" > $SCRATCH_MNT/testdir/fname1
$XFS_IO_PROG -c "fsync" $SCRATCH_MNT/testdir/fname1

# Simulate a power failure and mount the filesystem to check that all file names
# exist and correspond to the correct inodes.
_flakey_drop_and_remount

echo "File fname1 data after power failure: $(cat $SCRATCH_MNT/testdir/fname1)"
echo "File fname2 data after power failure: $(cat $SCRATCH_MNT/testdir/fname2)"
echo "File fname3 data after power failure: $(cat $SCRATCH_MNT/testdir/fname3)"
echo "File fname4 data after power failure: $(cat $SCRATCH_MNT/testdir/fname4)"

_unmount_flakey

status=0
exit