#! /bin/bash
# FS QA Test No. 500
#
# Run fsx with log writes to verify power fail safeness.
#
#-----------------------------------------------------------------------
# Copyright (c) 2015 Facebook. All Rights Reserved.
#
# 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"

here=`pwd`
status=1	# failure is the default!

_cleanup()
{
	_log_writes_cleanup
}
trap "_cleanup; exit \$status" 0 1 2 3 15

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

# real QA test starts here
_supported_fs generic
_supported_os Linux
_require_test
_require_scratch_nocheck
_require_log_writes

rm -f $seqres.full

check_files()
{
	local name=$1

	# Now look for our files
	for i in $(find $SANITY_DIR -type f | grep $name | grep mark); do
		local filename=$(basename $i)
		local mark="${filename##*.}"
		echo "checking $filename" >> $seqres.full
		_log_writes_replay_log $filename
		_scratch_mount
		local expected_md5=$(_md5_checksum $i)
		local md5=$(_md5_checksum $SCRATCH_MNT/$name)
		[ "${md5}" != "${expected_md5}" ] && _fail "$filename md5sum mismatched"
		_scratch_unmount
		_check_scratch_fs
	done
}

SANITY_DIR=$TEST_DIR/fsxtests
rm -rf $SANITY_DIR
mkdir $SANITY_DIR

# Create the log
_log_writes_init

_log_writes_mkfs >> $seqres.full 2>&1

# Log writes emulates discard support, turn it on for maximum crying.
_log_writes_mount -o discard

NUM_FILES=4
NUM_OPS=200
FSX_OPTS="-N $NUM_OPS -d -P $SANITY_DIR -i $LOGWRITES_DMDEV"
# Set random seeds for fsx runs (0 for timestamp + pid)
# When test failure is detected, check the seed values printed
# by fsx processes to $seqres.full and set them in this array
# to repeat the same fsx runs
seeds=(0 0 0 0)
# Run fsx for a while
for j in `seq 0 $((NUM_FILES-1))`; do
	run_check $here/ltp/fsx $FSX_OPTS -S ${seeds[$j]} -j $j $SCRATCH_MNT/testfile$j &
done
wait

test_md5=()
for j in `seq 0 $((NUM_FILES-1))`; do
	test_md5[$j]=$(_md5_checksum $SCRATCH_MNT/testfile$j)
done

# Unmount the scratch dir and tear down the log writes target
_log_writes_mark last
_log_writes_unmount
_log_writes_mark end
_log_writes_remove
_check_scratch_fs

# check pre umount
echo "checking pre umount" >> $seqres.full
_log_writes_replay_log last
_scratch_mount
_scratch_unmount
_check_scratch_fs

for j in `seq 0 $((NUM_FILES-1))`; do
	check_files testfile$j
done

# Check the end
echo "checking post umount" >> $seqres.full
_log_writes_replay_log end
_scratch_mount
for j in `seq 0 $((NUM_FILES-1))`; do
	md5=$(_md5_checksum $SCRATCH_MNT/testfile$j)
	[ "${md5}" != "${test_md5[$j]}" ] && _fail "testfile$j end md5sum mismatched"
done
_scratch_unmount
_check_scratch_fs

echo "Silence is golden"
status=0
exit