mdadm/test: move some functions to new source file

To make 'test' file concise, move some functions to new file
tests/func.sh, and leave core functions in 'test' file.

Signed-off-by: Zhilong Liu <zlliu@suse.com>
Signed-off-by: Jes Sorensen <jsorensen@fb.com>

2 files changed, 352 insertions, 349 deletions

diff --git a/test b/test
index eb67ef5..6175c25 100755
--- a/test
+++ b/test
@@ -1,8 +1,10 @@
 #!/bin/bash
 #
 # run test suite for mdadm
-dir=$(pwd)
-mdadm=$dir/mdadm
+
+. tests/func.sh
+
+mdadm=$PWD/mdadm
 testdir="tests"
 targetdir="/var/tmp"
 logdir="$targetdir"
@@ -27,184 +29,16 @@ md2=/dev/md2
 mdp0=/dev/md_d0
 mdp1=/dev/md_d1
 
-# We test mdadm on loop-back block devices.
-# dir for storing files should be settable by command line maybe
-size=20000
-# super0, round down to multiple of 64 and substract 64
-mdsize0=19904
-# super00 is nested, subtract 128
-mdsize00=19840
-# super1.0 round down to multiple of 2, subtract 8
-mdsize1=19992
-mdsize1a=19988
-mdsize12=19988
-# super1.2 for linear: round to multiple of 2, subtract 4
-mdsize1_l=19996
-mdsize2_l=19996
-# subtract another 4 for bitmaps
-mdsize1b=19988
-mdsize11=19992
-mdsize11a=19456
-mdsize12=19988
-
-# ddf needs bigger devices as 32Meg is reserved!
-ddfsize=65536
-
-# $1 is optional parameter, it shows why to save log
-save_log() {
-	status=$1
-	logfile="$status""$_basename".log
-
-	cat $targetdir/stderr >> $targetdir/log
-	cp $targetdir/log $logdir/$_basename.log
-	echo "## $HOSTNAME: saving dmesg." >> $logdir/$logfile
-	dmesg -c >> $logdir/$logfile
-	echo "## $HOSTNAME: saving proc mdstat." >> $logdir/$logfile
-	cat /proc/mdstat >> $logdir/$logfile
-	array=($(mdadm -Ds | cut -d' ' -f2))
-	[ "$1" == "fail" ] &&
-		echo "FAILED - see $logdir/$_basename.log and $logdir/$logfile for details"
-	if [ $DEVTYPE == 'lvm' ]
-	then
-		# not supported lvm type yet
-		echo
-	elif [ "$DEVTYPE" == 'loop' -o "$DEVTYPE" == 'disk' ]
-	then
-		if [ ! -z "$array" -a ${#array[@]} -ge 1 ]
-		then
-			echo "## $HOSTNAME: mdadm -D ${array[@]}" >> $logdir/$logfile
-			$mdadm -D ${array[@]} >> $logdir/$logfile
-			# ignore saving external(external file, imsm...) bitmap
-			cat /proc/mdstat | grep -q "linear\|external" && return 0
-			md_disks=($($mdadm -D -Y ${array[@]} | grep "/dev/" | cut -d'=' -f2))
-			cat /proc/mdstat | grep -q "bitmap"
-			if [ $? -eq 0 ]
-			then
-				echo "## $HOSTNAME: mdadm -X ${md_disks[@]}" >> $logdir/$logfile
-				$mdadm -X ${md_disks[@]} >> $logdir/$logfile
-			fi
-		else
-			echo "## $HOSTNAME: no array assembled!" >> $logdir/$logfile
-		fi
-	fi
-}
-
 die() {
 	echo -e "\n\tERROR: $* \n"
 	save_log fail
 	exit 2
 }
 
-cleanup() {
-	udevadm settle
-	$mdadm -Ssq 2> /dev/null
-	case $DEVTYPE in
-	loop )
-		for d in 0 1 2 3 4 5 6 7  8 9 10 11 12 13
-		do
-			losetup -d /dev/loop$d
-			rm -f /dev/disk/by-path/loop*
-			rm -f /var/tmp/mdtest$d
-		done
-		;;
-	lvm )
-		for d in 0 1 2 3 4 5 6 7  8 9 10 11 12 13
-		do
-			eval "lvremove --quiet -f \$dev$d"
-		done
-		;;
-	disk )
-		$mdadm --zero ${disks[@]} &> /dev/null
-		;;
-	esac
-}
-
 ctrl_c() {
 	exitonerror=1
 }
 
-do_setup() {
-	trap cleanup 0 1 3 15
-	trap ctrl_c 2
-
-	[ -d $logdir ] || mkdir -p $logdir
-	dmesg -c > /dev/null
-
-	devlist=
-	if [ "$DEVTYPE" == "loop" ]
-	then
-		# make sure there are no loop devices remaining.
-		# udev started things can sometimes prevent them being stopped
-		# immediately
-		while grep loop /proc/partitions > /dev/null 2>&1
-		do
-			$mdadm -Ssq
-			losetup -d /dev/loop[0-9]* 2> /dev/null
-			sleep 0.2
-		done
-	elif [ "$DEVTYPE" == "disk" ]
-	then
-		if [ ! -z "$disks" ]
-		then
-			for d in $(seq 0 ${#disks[@]})
-			do
-				eval "dev$d=${disks[$d]}"
-				eval devlist=\"\$devlist \$dev$d\"
-				eval devlist$d=\"\$devlist\"
-			done
-			$mdadm --zero ${disks[@]} &> /dev/null
-		else
-			echo "Forget to provide physical devices for disk mode."
-			exit 1
-		fi
-	fi
-	for d in 0 1 2 3 4 5 6 7 8 9 10 11 12 13
-	do
-		sz=$size
-		[ $d -gt 7 ] && sz=$ddfsize
-		case $DEVTYPE in
-		loop)
-			[ -f $targetdir/mdtest$d ] ||
-				dd if=/dev/zero of=$targetdir/mdtest$d count=$sz bs=1K > /dev/null 2>&1
-			# make sure udev doesn't touch
-			mdadm --zero $targetdir/mdtest$d 2> /dev/null
-			[ -b /dev/loop$d ] || mknod /dev/loop$d b 7 $d
-			if [ $d -eq 7 ]
-			then
-				losetup /dev/loop$d $targetdir/mdtest6 # for multipath use
-			else
-				losetup /dev/loop$d $targetdir/mdtest$d
-			fi
-			eval dev$d=/dev/loop$d
-			eval file$d=$targetdir/mdtest$d
-			;;
-		lvm)
-			unset MULTIPATH
-			eval dev$d=/dev/mapper/${LVM_VOLGROUP}-mdtest$d
-			if ! lvcreate --quiet -L ${sz}K -n mdtest$d $LVM_VOLGROUP
-			then
-				trap '' 0 # make sure lvremove is not called
-				eval echo error creating \$dev$d
-				exit 129
-			fi
-			;;
-		ram)
-			unset MULTIPATH
-			eval dev$d=/dev/ram$d
-			;;
-		esac
-		eval devlist=\"\$devlist \$dev$d\"
-		eval devlist$d=\"\$devlist\"
-		#" <-- add this quote to un-confuse vim syntax highlighting
-	done
-	path0=$dev6
-	path1=$dev7
-	ulimit -c unlimited
-	[ -f /proc/mdstat ] || modprobe md_mod
-	echo 2000 > /proc/sys/dev/raid/speed_limit_max
-	echo 0 > /sys/module/md_mod/parameters/start_ro
-}
-
 # mdadm always adds --quiet, and we want to see any unexpected messages
 mdadm() {
 	rm -f $targetdir/stderr
@@ -244,137 +78,6 @@ mdadm() {
 	return $rv
 }
 
-# check various things
-check() {
-	case $1 in
-	spares )
-		spares=$(tr '] ' '\012\012' < /proc/mdstat | grep -c '(S)' || exit 0)
-		[ $spares -ne $2 ] &&
-			die "expected $2 spares, found $spares"
-		;;
-	raid* | linear )
-		grep -sq "active $1 " /proc/mdstat ||
-			die "active $1 not found"
-		;;
-	algorithm )
-		grep -sq " algorithm $2 " /proc/mdstat ||
-			die "algorithm $2 not found"
-		;;
-	resync | recovery | reshape )
-		cnt=5
-		while ! grep -sq $1 /proc/mdstat
-		do
-			if [ $cnt -gt 0 ] && grep -v idle /sys/block/md*/md/sync_action > /dev/null
-			then # Something isn't idle - wait a bit
-				sleep 0.5
-				cnt=$[cnt-1]
-			else
-				die "no $1 happening"
-			fi
-		done
-		;;
-	nosync )
-		sleep 0.5
-		# Since 4.2 we delay the close of recovery until there has been a chance for
-		# spares to be activated.  That means that a recovery that finds nothing
-		# to do can still take a little longer than expected.
-		# add an extra check: is sync_completed shows the end is reached, assume
-		# there is no recovery.
-		if grep -sq -E '(resync|recovery|reshape) *=' /proc/mdstat
-		then
-			incomplete=`grep / /sys/block/md*/md/sync_completed 2> /dev/null | sed '/^ *\([0-9]*\) \/ \1/d'`
-			[ -n "$incomplete" ] &&
-				die "resync or recovery is happening!"
-		fi
-		;;
-	wait )
-		p=`cat /proc/sys/dev/raid/speed_limit_max`
-		echo 2000000 > /proc/sys/dev/raid/speed_limit_max
-		sleep 0.1
-		while grep -Eq '(resync|recovery|reshape|check|repair) *=' /proc/mdstat ||
-			grep -v idle > /dev/null /sys/block/md*/md/sync_action
-		do
-			sleep 0.5
-		done
-		echo $p > /proc/sys/dev/raid/speed_limit_max
-		;;
-	state )
-		grep -sq "blocks.*\[$2\]\$" /proc/mdstat ||
-			die "state $2 not found!"
-		sleep 0.5
-		;;
-	bitmap )
-		grep -sq bitmap /proc/mdstat ||
-			die "no bitmap"
-		;;
-	nobitmap )
-		grep -sq "bitmap" /proc/mdstat &&
-			die "bitmap present"
-		;;
-	readonly )
-		grep -sq "read-only" /proc/mdstat ||
-			die "array is not read-only!"
-		;;
-	inactive )
-		grep -sq "inactive" /proc/mdstat ||
-			die "array is not inactive!"
-		;;
-	# It only can be used when there is only one raid
-	chunk )
-		chunk_size=`awk -F',' '/chunk/{print $2}' /proc/mdstat | awk -F'[a-z]' '{print $1}'`
-		if [ "$chunk_size" -ne "$2" ] ; then
-			die "chunksize should be $2, but it's $chunk_size"
-		fi
-		;;
-	* )
-		die "unknown check $1"
-		;;
-	esac
-}
-
-no_errors() {
-	if [ -s $targetdir/stderr ]
-	then
-		echo Bad errors from mdadm:
-		cat $targetdir/stderr
-		exit 2
-	fi
-}
-
-# basic device test
-testdev() {
-	[ -b $1 ] || die "$1 isn't a block device."
-	[ "$DEVTYPE" == "disk" ] && return 0
-	udevadm settle
-	dev=$1
-	cnt=$2
-	dvsize=$3
-	chunk=$4
-	if [ -z "$5" ]
-	then
-		mkfs.ext3 -F -j $dev > /dev/null 2>&1 && fsck -fn $dev >&2
-	fi
-	dsize=$[dvsize/chunk]
-	dsize=$[dsize*chunk]
-	rasize=$[dsize*2*cnt]
-	# rasize is in sectors
-	if [ -n "$DEV_ROUND_K" ]
-	then
-		rasize=$[rasize/DEV_ROUND_K/2]
-		rasize=$[rasize*DEV_ROUND_K*2]
-	fi
-	[ `/sbin/blockdev --getsize $dev` -eq 0 ] && sleep 2
-	_sz=`/sbin/blockdev --getsize $dev`
-	[ $rasize -lt $_sz -o $[rasize*4/5] -gt $_sz ] &&
-		die "size is wrong for $dev: $cnt * $dvsize (chunk=$chunk) = $rasize, not $_sz"
-	return 0
-}
-
-rotest() {
-	dev=$1
-	fsck -fn $dev >&2
-}
-
 do_test() {
 	_script=$1
 	_basename=`basename $_script`
@@ -532,55 +235,7 @@ parse_args() {
 	done
 }
 
-check_env() {
-	user=$(id -un)
-	[ "X$user" != "Xroot" ] && {
-		echo "test: testing can only be done as 'root'."
-		exit 1
-	}
-	[ -x "raid6check" -a -x $mdadm ] || {
-		echo "test: please run 'make everything' before perform testing."
-		exit 1
-	}
-	cmds=(mdadm lsblk df udevadm losetup mkfs.ext3 fsck seq)
-	for cmd in ${cmds[@]}
-	do
-		which $cmd > /dev/null || {
-			echo "$cmd command not found!"
-			exit 1
-		}
-	done
-	mdadm_src_ver="$($mdadm -V 2>&1)"
-	mdadm_sbin_ver="$($(which mdadm) -V 2>&1)"
-	if [ "$mdadm_src_ver" != "$mdadm_sbin_ver" ]
-	then
-		# it's nessesary to 'make install' mdadm to /SBIN/DIR,
-		# such as systemd/mdadm-grow-continue@.service, would
-		# run as an instance by systemd when reshape happens,
-		# thus ensure that the correct mdadm is in testing.
-		echo "test: please run 'make install' before testing."
-		exit 1
-	fi
-	if ! $(df -T . | grep -iq ext)
-	then
-		# 'external file' bitmap only supports with ext[2-4] file system
-		echo "test: please run test suite with ext[2-4] file system."
-		exit 1
-	fi
-	if $(lsblk -a | grep -iq raid)
-	then
-		# donot run mdadm -Ss directly if there are RAIDs working.
-		echo "test: please run test suite without running RAIDs environment."
-		exit 1
-	fi
-	# Check whether to run multipath tests
-	modprobe multipath 2> /dev/null
-	grep -sq 'Personalities : .*multipath' /proc/mdstat &&
-		MULTIPATH="yes"
-}
-
 main() {
-	check_env
 	do_setup
 
 	echo "Testing on linux-$(uname -r) kernel"
diff --git a/tests/func.sh b/tests/func.sh
new file mode 100644
index 0000000..40c6026
--- /dev/null
+++ b/tests/func.sh
@@ -0,0 +1,348 @@
+#!/bin/bash
+
+# We test mdadm on loop-back block devices.
+# dir for storing files should be settable by command line maybe
+size=20000
+# super0, round down to multiple of 64 and substract 64
+mdsize0=19904
+# super00 is nested, subtract 128
+mdsize00=19840
+# super1.0 round down to multiple of 2, subtract 8
+mdsize1=19992
+mdsize1a=19988
+mdsize12=19988
+# super1.2 for linear: round to multiple of 2, subtract 4
+mdsize1_l=19996
+mdsize2_l=19996
+# subtract another 4 for bitmaps
+mdsize1b=19988
+mdsize11=19992
+mdsize11a=19456
+mdsize12=19988
+
+# ddf needs bigger devices as 32Meg is reserved!
+ddfsize=65536
+
+# $1 is optional parameter, it shows why to save log
+save_log() {
+	status=$1
+	logfile="$status""$_basename".log
+
+	cat $targetdir/stderr >> $targetdir/log
+	cp $targetdir/log $logdir/$_basename.log
+	echo "## $HOSTNAME: saving dmesg." >> $logdir/$logfile
+	dmesg -c >> $logdir/$logfile
+	echo "## $HOSTNAME: saving proc mdstat." >> $logdir/$logfile
+	cat /proc/mdstat >> $logdir/$logfile
+	array=($(mdadm -Ds | cut -d' ' -f2))
+	[ "$1" == "fail" ] &&
+		echo "FAILED - see $logdir/$_basename.log and $logdir/$logfile for details"
+	if [ $DEVTYPE == 'lvm' ]
+	then
+		# not supported lvm type yet
+		echo
+	elif [ "$DEVTYPE" == 'loop' -o "$DEVTYPE" == 'disk' ]
+	then
+		if [ ! -z "$array" -a ${#array[@]} -ge 1 ]
+		then
+			echo "## $HOSTNAME: mdadm -D ${array[@]}" >> $logdir/$logfile
+			$mdadm -D ${array[@]} >> $logdir/$logfile
+			# ignore saving external(external file, imsm...) bitmap
+			cat /proc/mdstat | grep -q "linear\|external" && return 0
+			md_disks=($($mdadm -D -Y ${array[@]} | grep "/dev/" | cut -d'=' -f2))
+			cat /proc/mdstat | grep -q "bitmap"
+			if [ $? -eq 0 ]
+			then
+				echo "## $HOSTNAME: mdadm -X ${md_disks[@]}" >> $logdir/$logfile
+				$mdadm -X ${md_disks[@]} >> $logdir/$logfile
+			fi
+		else
+			echo "## $HOSTNAME: no array assembled!" >> $logdir/$logfile
+		fi
+	fi
+}
+
+cleanup() {
+	udevadm settle
+	$mdadm -Ssq 2> /dev/null
+	case $DEVTYPE in
+	loop )
+		for d in 0 1 2 3 4 5 6 7  8 9 10 11 12 13
+		do
+			losetup -d /dev/loop$d &> /dev/null
+			rm -f /dev/disk/by-path/loop*
+			rm -f /var/tmp/mdtest$d
+		done
+	;;
+	lvm )
+		for d in 0 1 2 3 4 5 6 7  8 9 10 11 12 13
+		do
+			eval "lvremove --quiet -f \$dev$d"
+		done
+	;;
+	disk )
+		$mdadm --zero ${disks[@]} &> /dev/null
+	;;
+	esac
+}
+
+check_env() {
+	user=$(id -un)
+	[ "X$user" != "Xroot" ] && {
+		echo "test: testing can only be done as 'root'."
+		exit 1
+	}
+	[ -x "raid6check" -a -x $mdadm ] || {
+		echo "test: please run 'make everything' before perform testing."
+		exit 1
+	}
+	cmds=(mdadm lsblk df udevadm losetup mkfs.ext3 fsck seq)
+	for cmd in ${cmds[@]}
+	do
+		which $cmd > /dev/null || {
+			echo "$cmd command not found!"
+			exit 1
+		}
+	done
+	mdadm_src_ver="$($mdadm -V 2>&1)"
+	mdadm_sbin_ver="$($(which mdadm) -V 2>&1)"
+	if [ "$mdadm_src_ver" != "$mdadm_sbin_ver" ]
+	then
+		# it's nessesary to 'make install' mdadm to /SBIN/DIR,
+		# such as systemd/mdadm-grow-continue@.service, would
+		# run as an instance by systemd when reshape happens,
+		# thus ensure that the correct mdadm is in testing.
+		echo "test: please run 'make install' before testing."
+		exit 1
+	fi
+	if ! $(df -T . | grep -iq ext)
+	then
+		# 'external file' bitmap only supports with ext[2-4] file system
+		echo "test: please run test suite with ext[2-4] file system."
+		exit 1
+	fi
+	if $(lsblk -a | grep -iq raid)
+	then
+		# donot run mdadm -Ss directly if there are RAIDs working.
+		echo "test: please run test suite without running RAIDs environment."
+		exit 1
+	fi
+	# Check whether to run multipath tests
+	modprobe multipath 2> /dev/null
+	grep -sq 'Personalities : .*multipath' /proc/mdstat &&
+		MULTIPATH="yes"
+}
+
+do_setup() {
+	trap cleanup 0 1 3 15
+	trap ctrl_c 2
+
+	check_env
+	[ -d $logdir ] || mkdir -p $logdir
+	dmesg -c > /dev/null
+
+	devlist=
+	if [ "$DEVTYPE" == "loop" ]
+	then
+		# make sure there are no loop devices remaining.
+		# udev started things can sometimes prevent them being stopped
+		# immediately
+		while grep loop /proc/partitions > /dev/null 2>&1
+		do
+			$mdadm -Ssq
+			losetup -d /dev/loop[0-9]* 2> /dev/null
+			sleep 0.2
+		done
+	elif [ "$DEVTYPE" == "disk" ]
+	then
+		if [ ! -z "$disks" ]
+		then
+			for d in $(seq 0 ${#disks[@]})
+			do
+				eval "dev$d=${disks[$d]}"
+				eval devlist=\"\$devlist \$dev$d\"
+				eval devlist$d=\"\$devlist\"
+			done
+			$mdadm --zero ${disks[@]} &> /dev/null
+		else
+			echo "Forget to provide physical devices for disk mode."
+			exit 1
+		fi
+	fi
+	for d in 0 1 2 3 4 5 6 7 8 9 10 11 12 13
+	do
+		sz=$size
+		[ $d -gt 7 ] && sz=$ddfsize
+		case $DEVTYPE in
+		loop)
+			[ -f $targetdir/mdtest$d ] ||
+				dd if=/dev/zero of=$targetdir/mdtest$d count=$sz bs=1K > /dev/null 2>&1
+			# make sure udev doesn't touch
+			mdadm --zero $targetdir/mdtest$d 2> /dev/null
+			[ -b /dev/loop$d ] || mknod /dev/loop$d b 7 $d
+			if [ $d -eq 7 ]
+			then
+				losetup /dev/loop$d $targetdir/mdtest6 # for multipath use
+			else
+				losetup /dev/loop$d $targetdir/mdtest$d
+			fi
+			eval dev$d=/dev/loop$d
+			eval file$d=$targetdir/mdtest$d
+		;;
+		lvm)
+			unset MULTIPATH
+			eval dev$d=/dev/mapper/${LVM_VOLGROUP}-mdtest$d
+			if ! lvcreate --quiet -L ${sz}K -n mdtest$d $LVM_VOLGROUP
+			then
+				trap '' 0 # make sure lvremove is not called
+				eval echo error creating \$dev$d
+				exit 129
+			fi
+		;;
+		ram)
+			unset MULTIPATH
+			eval dev$d=/dev/ram$d
+		;;
+		esac
+		eval devlist=\"\$devlist \$dev$d\"
+		eval devlist$d=\"\$devlist\"
+		#" <-- add this quote to un-confuse vim syntax highlighting
+	done
+	path0=$dev6
+	path1=$dev7
+	ulimit -c unlimited
+	[ -f /proc/mdstat ] || modprobe md_mod
+	echo 2000 > /proc/sys/dev/raid/speed_limit_max
+	echo 0 > /sys/module/md_mod/parameters/start_ro
+}
+
+# check various things
+check() {
+	case $1 in
+	spares )
+		spares=$(tr '] ' '\012\012' < /proc/mdstat | grep -c '(S)' || exit 0)
+		[ $spares -ne $2 ] &&
+			die "expected $2 spares, found $spares"
+	;;
+	raid* | linear )
+		grep -sq "active $1 " /proc/mdstat ||
+			die "active $1 not found"
+	;;
+	algorithm )
+		grep -sq " algorithm $2 " /proc/mdstat ||
+			die "algorithm $2 not found"
+	;;
+	resync | recovery | reshape )
+		cnt=5
+		while ! grep -sq $1 /proc/mdstat
+		do
+			if [ $cnt -gt 0 ] && grep -v idle /sys/block/md*/md/sync_action > /dev/null
+			then # Something isn't idle - wait a bit
+				sleep 0.5
+				cnt=$[cnt-1]
+			else
+				die "no $1 happening"
+			fi
+		done
+	;;
+	nosync )
+		sleep 0.5
+		# Since 4.2 we delay the close of recovery until there has been a chance for
+		# spares to be activated.  That means that a recovery that finds nothing
+		# to do can still take a little longer than expected.
+		# add an extra check: is sync_completed shows the end is reached, assume
+		# there is no recovery.
+		if grep -sq -E '(resync|recovery|reshape) *=' /proc/mdstat
+		then
+			incomplete=`grep / /sys/block/md*/md/sync_completed 2> /dev/null | sed '/^ *\([0-9]*\) \/ \1/d'`
+			[ -n "$incomplete" ] &&
+				die "resync or recovery is happening!"
+		fi
+	;;
+	wait )
+		p=`cat /proc/sys/dev/raid/speed_limit_max`
+		echo 2000000 > /proc/sys/dev/raid/speed_limit_max
+		sleep 0.1
+		while grep -Eq '(resync|recovery|reshape|check|repair) *=' /proc/mdstat ||
+			grep -v idle > /dev/null /sys/block/md*/md/sync_action
+		do
+			sleep 0.5
+		done
+		echo $p > /proc/sys/dev/raid/speed_limit_max
+	;;
+	state )
+		grep -sq "blocks.*\[$2\]\$" /proc/mdstat ||
+			die "state $2 not found!"
+		sleep 0.5
+	;;
+	bitmap )
+		grep -sq bitmap /proc/mdstat ||
+			die "no bitmap"
+	;;
+	nobitmap )
+		grep -sq "bitmap" /proc/mdstat &&
+			die "bitmap present"
+	;;
+	readonly )
+		grep -sq "read-only" /proc/mdstat ||
+			die "array is not read-only!"
+	;;
+	inactive )
+		grep -sq "inactive" /proc/mdstat ||
+			die "array is not inactive!"
+	;;
+	# It only can be used when there is only one raid
+	chunk )
+		chunk_size=`awk -F',' '/chunk/{print $2}' /proc/mdstat | awk -F'[a-z]' '{print $1}'`
+		if [ "$chunk_size" -ne "$2" ] ; then
+			die "chunksize should be $2, but it's $chunk_size"
+		fi
+	;;
+	* )
+		die "unknown check $1"
+	;;
+	esac
+}
+
+no_errors() {
+	if [ -s $targetdir/stderr ]
+	then
+		echo Bad errors from mdadm:
+		cat $targetdir/stderr
+		exit 2
+	fi
+}
+
+# basic device test
+testdev() {
+	[ -b $1 ] || die "$1 isn't a block device."
+	[ "$DEVTYPE" == "disk" ] && return 0
+	udevadm settle
+	dev=$1
+	cnt=$2
+	dvsize=$3
+	chunk=$4
+	if [ -z "$5" ]
+	then
+		mkfs.ext3 -F -j $dev > /dev/null 2>&1 && fsck -fn $dev >&2
+	fi
+	dsize=$[dvsize/chunk]
+	dsize=$[dsize*chunk]
+	rasize=$[dsize*2*cnt]
+	# rasize is in sectors
+	if [ -n "$DEV_ROUND_K" ]
+	then
+		rasize=$[rasize/DEV_ROUND_K/2]
+		rasize=$[rasize*DEV_ROUND_K*2]
+	fi
+	[ `/sbin/blockdev --getsize $dev` -eq 0 ] && sleep 2
+	_sz=`/sbin/blockdev --getsize $dev`
+	[ $rasize -lt $_sz -o $[rasize*4/5] -gt $_sz ] &&
+		die "size is wrong for $dev: $cnt * $dvsize (chunk=$chunk) = $rasize, not $_sz"
+	return 0
+}
+
+rotest() {
+	dev=$1
+	fsck -fn $dev >&2
+}