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Updates to aio-stress test to make multi-threaded tests really that way.
Merge of master-melb:xfs-cmds:21490a by kenmcd.

#! /bin/sh
# FS QA Test No. 113
#
# aio-stress
#
#-----------------------------------------------------------------------
# Copyright (c) 2005 Silicon Graphics, Inc.  All Rights Reserved.
# 
# This program is free software; you can redistribute it and/or modify it
# under the terms of version 2 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.
# 
# Further, this software is distributed without any warranty that it is
# free of the rightful claim of any third person regarding infringement
# or the like.  Any license provided herein, whether implied or
# otherwise, applies only to this software file.  Patent licenses, if
# any, provided herein do not apply to combinations of this program with
# other software, or any other product whatsoever.
# 
# You should have received a copy of the GNU General Public License along
# with this program; if not, write the Free Software Foundation, Inc., 59
# Temple Place - Suite 330, Boston MA 02111-1307, USA.
# 
# Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
# Mountain View, CA  94043, or:
# 
# http://www.sgi.com 
# 
# For further information regarding this notice, see: 
# 
# http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
#-----------------------------------------------------------------------
#
# creator
owner=nathans@sgi.com

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

here=`pwd`
tmp=/tmp/$$
status=0	# success is the default!
trap "_cleanup; exit \$status" 0 1 2 3 15

_cleanup()
{
    cd /
    # we might get here with a RO FS
    mount -o remount,rw $TEST_DEV >/dev/null 2>&1
    # now kill!
    rm -f $testdir/aio-stress.$$.*
    _cleanup_testdir
}

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

_do_test()
{
    _n="$1"
    _param="$2"
    _count="$3"
    _nproc="$4"

    _files="$testdir/aiostress.$$.$_n"
    __proc=$_nproc
    [ $__proc -gt 1 ] && _param="-t $__proc $_param"
    while [ $__proc -gt 1 ]; do
        _files="$_files $testdir/aiostress.$$.$_n.$__proc"
	__proc=`expr $__proc - 1`
    done
    rm -f $_files
 
    echo ""
    echo "-----------------------------------------------"
    echo "aio-stress.$_n : $_param"
    echo "-----------------------------------------------"
    if ! $here/ltp/aio-stress $_param $AIOSTRESS_AVOID -I $_count $_files >>$tmp.out 2>&1
    then
        echo "    aio-stress (count=$_count) returned $?"
        cat $tmp.out
        status=1
    fi

    _check_test_fs
}


# real QA test starts here
_supported_os Linux

[ -x $here/ltp/aio-stress ] || _notrun "aio-stress not built for this platform"

_setup_testdir

echo "brevity is wit..."

count=1000
procs=20

_check_test_fs

# the default
_do_test 1 "" $count 1

# and the default with multiprocess
_do_test 2 "" $count $procs

# as above, but now using direct IO
_do_test 3 "-O" $count $procs

exit