#! /bin/bash
# FSQA Test No. 335
#
# Test that if we move one file between directories, fsync the parent directory
# of the old directory, power fail and remount the filesystem, the file is not
# lost and it's located at the destination directory.
#
#-----------------------------------------------------------------------
#
# 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

# Create our test directories and the file we will later check if it has
# disappeared.
mkdir -p $SCRATCH_MNT/a/b
mkdir $SCRATCH_MNT/c
touch $SCRATCH_MNT/a/b/foo

# Make sure everything is durably persisted.
sync

# Now move our test file into a new parent directory.
mv $SCRATCH_MNT/a/b/foo $SCRATCH_MNT/c/

# Create a new file inside the parent directory of the directory where our test
# file foo was previously at. This is just to ensure the fsync we do next
# against that parent directory actually does something and it's not a noop.
touch $SCRATCH_MNT/a/bar
$XFS_IO_PROG -c "fsync" $SCRATCH_MNT/a

echo "Filesystem content before power failure:"
ls -R $SCRATCH_MNT/a $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 our file foo to exist, have an entry in the new parent
# directory (c/) and not have anymore an entry in the old parent directory
# (a/b/).
# The new file named bar should also exist.
echo "Filesystem content after power failure:"
# Must match what we had before the power failure.
ls -R $SCRATCH_MNT/a $SCRATCH_MNT/c | _filter_scratch

_unmount_flakey

status=0
exit