#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2016 SUSE Linux Products GmbH. All Rights Reserved.
#
# FSQA Test No. 336
#
# Test that if we have a file F1 with two links, one in a directory A and the
# other in directory B, if we remove the link in directory B, move some other
# file F2 from directory B into directory C, fsync inode F1, power fail and
# remount the filesystem, file F2 exists and is located only in directory C.
#
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
_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

# Create our test directories and the file we will later check if it has
# disappeared (file bar).
mkdir $SCRATCH_MNT/a
mkdir $SCRATCH_MNT/b
mkdir $SCRATCH_MNT/c
touch $SCRATCH_MNT/a/foo
ln $SCRATCH_MNT/a/foo $SCRATCH_MNT/b/foo_link
touch $SCRATCH_MNT/b/bar

# Make sure everything is durably persisted.
sync

# Now delete one of the hard links of file foo and move file bar into c/
unlink $SCRATCH_MNT/b/foo_link
mv $SCRATCH_MNT/b/bar $SCRATCH_MNT/c/

# Now fsync file foo.
$XFS_IO_PROG -c "fsync" $SCRATCH_MNT/a/foo

echo "Filesystem content before power failure:"
ls -R $SCRATCH_MNT/a $SCRATCH_MNT/b $SCRATCH_MNT/c | _filter_scratch

# Simulate a power failure / crash and remount the filesystem, so that the
# journal/log is replayed.
_flakey_drop_and_remount

# We expect that after the journal/log was replayed, we no longer have the link
# foo_link and file bar was moved from directory b/ to directory c/.
echo "Filesystem content after power failure:"
# Must match what we had before the power failure.
ls -R $SCRATCH_MNT/a $SCRATCH_MNT/b $SCRATCH_MNT/c | _filter_scratch

_unmount_flakey

status=0
exit