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Rewrote test 068, test to to reproduce xfs_freeze hang under filsystem load.
Merge of master-melb:xfs-cmds:21434a by kenmcd.

  Rewrote test 068. Test case to reproduce xfs_freeze hang under filsystem load.

#! /bin/sh
# 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; either version 2 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will 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 to the Free Software
#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
#  USA
#
#  Contact information: Silicon Graphics, Inc., 1500 Crittenden Lane,
#  Mountain View, CA 94043, USA, or: http://www.sgi.com
#-----------------------------------------------------------------------
#
# creator
owner=ajones@sgi.com

seq=`basename $0`
echo "QA output created by $seq"

here=`pwd`
tmp=/tmp/$$
status=0	# success is the default!

ITERATIONS=10

_cleanup()
{
    cd /
    _cleanup_testdir

    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 xfs
_supported_os Linux IRIX

_require_scratch

echo "*** init FS"

rm -f $seq.full
umount $SCRATCH_DEV >/dev/null 2>&1
echo "*** MKFS ***"                         >>$seq.full
echo ""                                     >>$seq.full
_scratch_mkfs_xfs                           >>$seq.full 2>&1 \
    || _fail "mkfs failed"
_scratch_mount                              >>$seq.full 2>&1 \
    || _fail "mount failed"

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
      #	-w ensures that the only ops are ones which cause write I/O
      ltp/fsstress -d $STRESS_DIR -w -p $procs -n $nops $FSSTRESS_AVOID \
	  > /dev/null 2>&1
    done

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

i=0
ITERATIONS=`expr $ITERATIONS - 1`

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

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

	echo  | tee -a $seq.full
	i=`expr $i + 1`
done

# stop fsstress iterations
rm $tmp.running

# wait for fsstresses to finish
wait

_check_scratch_fs

exit 1