tests/generic/068

#! /bin/bash
# FSQA Test No. 068
#
# Test case to reproduce xfs_freeze hang under filsystem load.
# The fail case for this test is a hang on an xfs_freeze.
#
#-----------------------------------------------------------------------
# Copyright (c) 2000-2005 Silicon Graphics, Inc.  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`
tmp=/tmp/$$
status=0	# success is the default!

ITERATIONS=10

_cleanup()
{
    cd /

    trap 0 1 2 3 15
    exit $status
}

trap "_cleanup" 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

_require_scratch
_require_freeze

echo "*** init FS"

rm -f $seqres.full
_scratch_unmount >/dev/null 2>&1
echo "*** MKFS ***"                         >>$seqres.full
echo ""                                     >>$seqres.full
_scratch_mkfs                               >>$seqres.full 2>&1 \
    || _fail "mkfs failed"
_scratch_mount

touch $tmp.running

# start fsstress loop in a background block
{
    STRESS_DIR="$SCRATCH_MNT/fsstress_test_dir"
    mkdir "$STRESS_DIR"

    procs=2
    nops=200
    while [ -f "$tmp.running" ]
      do
      # We do both read & write IO - not only is this more realistic,
      # but it also potentially tests atime updates
      FSSTRESS_ARGS=`_scale_fsstress_args -d $STRESS_DIR -p $procs -n $nops $FSSTRESS_AVOID`
      $FSSTRESS_PROG $FSSTRESS_ARGS > /dev/null 2>&1
    done

    rm -r $STRESS_DIR/*
    rmdir $STRESS_DIR
} &

# start fstest -m loop in a background block; this gets us mmap coverage
{
    FSTEST_DIR="$SCRATCH_MNT/fstest_test_dir"
    mkdir "$FSTEST_DIR"

    procs=2
    while [ -f "$tmp.running" ]
      do
      src/fstest -m -p $FSTEST_DIR  -n $procs -f 4 > /dev/null 2>&1
    done

    rm -rf $FSTEST_DIR/*
    rmdir $FSTEST_DIR
} &

i=0
let ITERATIONS=$ITERATIONS-1

echo | tee -a $seqres.full
while [ $i -le $ITERATIONS ]
do
        echo "*** iteration: $i" | tee -a $seqres.full
	echo "*** freezing \$SCRATCH_MNT" | tee -a $seqres.full
	xfs_freeze -f "$SCRATCH_MNT" | tee -a $seqres.full
	[ $? != 0 ] && echo xfs_freeze -f "$SCRATCH_MNT" failed | \
	    tee -a $seqres.full
	sleep 2

	echo "*** thawing  \$SCRATCH_MNT" | tee -a $seqres.full
	xfs_freeze -u "$SCRATCH_MNT" | tee -a $seqres.full
	[ $? != 0 ] && echo xfs_freeze -u "$SCRATCH_MNT" failed | \
	    tee -a $seqres.full
	sleep 2

	echo  | tee -a $seqres.full
	let i=$i+1
done

# stop fsstress iterations
rm $tmp.running

# wait for fsstresses to finish
wait

exit 1