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Add a test to exercise concurrent block device reads and filesystem activity

#! /bin/sh
# XFS QA Test No. 076
#
# Test blockdev reads in parallel with filesystem reads/writes
#
#-----------------------------------------------------------------------
# Copyright (c) 2000-2002 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=1

_lets_get_pidst()
{
	if [ -n "$pid" ]; then
		kill -TERM $pid 2>/dev/null
		pid=""
		wait 2>/dev/null
	fi
}

_cleanup()
{
	echo "*** unmount"
	umount $SCRATCH_MNT 2>/dev/null
	_lets_get_pidst
}
trap "_cleanup; 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

_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"

echo "*** test concurrent block/fs access"

cat $SCRATCH_DEV >/dev/null &
pid=$!

ltp/fsstress -d $SCRATCH_MNT -p 2 -n 2000 $FSSTRESS_AVOID >>$seq.full

_lets_get_pidst
_check_scratch_fs

echo "*** done"
status=0
exit