#! /bin/bash
# FSQA Test No. 299
#
# AIO/DIO stress test
# Run random AIO/DIO activity and fallocate/truncate simultaneously
# Test will operate on huge sparsed files so ENOSPC is expected.
#
#-----------------------------------------------------------------------
# (c) 2013 Dmitry Monakhov
#
# 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`
tmp=/tmp/$$
fio_config=$tmp.fio
status=1	# failure is the default!
trap "rm -f $tmp.*; exit \$status" 0 1 2 3 15

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

# real QA test starts here
_supported_fs generic
_supported_os Linux
_need_to_be_root
_require_scratch

NUM_JOBS=$((4*LOAD_FACTOR))
BLK_DEV_SIZE=`blockdev --getsz $SCRATCH_DEV`
FILE_SIZE=$((BLK_DEV_SIZE * 512))

cat >$fio_config <<EOF
###########
# $seq test fio activity
# Filenames derived from jobsname and jobid like follows:
# ${JOB_NAME}.${JOB_ID}.${ITERATION_ID}
[global]
ioengine=libaio
bs=128k
directory=${SCRATCH_MNT}
filesize=${FILE_SIZE}
size=999G
iodepth=128*${LOAD_FACTOR}
continue_on_error=write
ignore_error=,ENOSPC
error_dump=0
create_on_open=1
fallocate=none
exitall=1

## Perform direct aio, to files which may be truncated
## by external task
[direct_aio]
direct=1
buffered=0
numjobs=${NUM_JOBS}
rw=randwrite
runtime=100*${TIME_FACTOR}
time_based

# Perform direct aio and verify data
# This test case should check use-after-free issues
[aio-dio-verifier]
numjobs=1
verify=crc32c-intel
verify_fatal=1
verify_dump=1
verify_backlog=1024
verify_async=4
verifysort=1
direct=1
bs=4k
rw=randrw
filename=aio-dio-verifier

# Perform buffered aio and verify data
# This test case should check use-after-free issues
[buffered-aio-verifier]
numjobs=1
verify=crc32c-intel
verify_fatal=1
verify_dump=1
verify_backlog=1024
verify_async=4
verifysort=1
direct=0
buffered=1
bs=4k
rw=randrw
filename=buffered-aio-verifier
EOF

_require_fio $fio_config

_workout()
{
	echo ""
	echo "Run fio with random aio-dio pattern"
	echo ""
	cat $fio_config >>  $seqres.full
	run_check $FIO_PROG $fio_config &
	pid=$!
	echo "Start fallocate/truncate loop"

	for ((i=0; ; i++))
	do
	    for ((k=1; k <= NUM_JOBS; k++))
	    do
		fallocate -l $FILE_SIZE $SCRATCH_MNT/direct_aio.$k.0 \
			>> $seqres.full 2>&1
	    done
	    for ((k=1; k <= NUM_JOBS; k++))
	    do
		truncate -s 0 $SCRATCH_MNT/direct_aio.$k.0 >> $seqres.full 2>&1
	    done
	    # Following like will check that pid is still run.
	    # Once fio exit we can stop fallocate/truncate loop
	    kill -0 $pid > /dev/null 2>&1 || break
	done
	wait $pid
}

_scratch_mkfs >> $seqres.full 2>&1
_scratch_mount

if ! _workout; then
	umount $SCRATCH_DEV 2>/dev/null
	exit
fi

if ! _scratch_unmount; then
	echo "failed to umount"
	status=1
	exit
fi
status=0
exit