#! /bin/bash
# FSQA Test No. 341
#
# Test that if we rename a directory, create a new file or directory that has
# the old name of our former directory and is a child of the same parent
# directory, fsync the new inode, power fail and mount the filesystem, we see
# our first directory with the new name and no files under it were lost.
#
#-----------------------------------------------------------------------
#
# Copyright (C) 2016 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
_require_metadata_journaling $SCRATCH_DEV

rm -f $seqres.full

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

mkdir -p $SCRATCH_MNT/a/x
$XFS_IO_PROG -f -c "pwrite -S 0xaf 0 32K" $SCRATCH_MNT/a/x/foo | _filter_xfs_io
$XFS_IO_PROG -f -c "pwrite -S 0xba 0 32K" $SCRATCH_MNT/a/x/bar | _filter_xfs_io
# Make sure everything done so far is durably persisted.
sync

echo "File digests before power failure:"
md5sum $SCRATCH_MNT/a/x/foo | _filter_scratch
md5sum $SCRATCH_MNT/a/x/bar | _filter_scratch

# Now rename directory x to y and create a new directory that is also named x.
# Then fsync the new directory. After a power failure, we must see directories
# y and x and directory y has the same files (and with the same content) it had
# before the power failure.
mv $SCRATCH_MNT/a/x $SCRATCH_MNT/a/y
mkdir $SCRATCH_MNT/a/x
$XFS_IO_PROG -c "fsync" $SCRATCH_MNT/a/x

# Simulate a power failure and mount again the filesystem to trigger replay of
# its journal/log.
_flakey_drop_and_remount

echo "Directory a/ contents after log replay:"
ls -R $SCRATCH_MNT/a | _filter_scratch

echo "File digests after log replay:"
# Must match what we got before the power failure.
md5sum $SCRATCH_MNT/a/y/foo | _filter_scratch
md5sum $SCRATCH_MNT/a/y/bar | _filter_scratch

_unmount_flakey
status=0
exit