imsm_check() {
   case $1 in
    container )
      grep -s "$(((418 * $2)/2)) blocks super external:imsm" /proc/mdstat > /dev/null || {
   		echo >&2 "ERROR correctly formed container not found"; cat /proc/mdstat; exit 1;}
      ;;
    member )
      member=$2
      num_disks=$3
      level=$4
      size=$5
      offset=$6
      err=0

      eval `stat -L -c "let major=0x%t; let minor=0x%T;" $member`
      sysfs=/sys/dev/block/${major}:${minor}
      if [ ! -f ${sysfs}/md/array_state ]; then
           echo "member array $member not found" >&2
           cat /proc/mdstat >&2
           exit 1
      fi
      for i in `seq 0 $((num_disks-1))`
      do
         _offset=`cat ${sysfs}/md/rd${i}/offset`
         if [ $offset -ne $((_offset/2)) ]; then
	    echo "offset mismatch expected $offset got $_offset" >&2
            err=$((err+1))
         fi
         _size=`cat ${sysfs}/md/rd${i}/size`
         if [ $size -ne $_size ]; then
	    echo "offset mismatch expected $size got $_size" >&2
            err=$((err+1))
         fi
      done

      if [ $err -gt 0 ]; then
          echo "$member failed check" >&2
          cat /proc/mdstat >&2
	  mdadm -E /dev/loop0 >&2
          exit 1
      fi
      ;;
    * ) echo >&2 ERROR unknown check $1 ; exit 1;
   esac
}

setup_env() {
	export IMSM_DEVNAME_AS_SERIAL=1
	export IMSM_NO_PLATFORM=1
	container=/dev/md/container
	member0=/dev/md/vol0
	member1=/dev/md/vol1
	member2=/dev/md/vol2
	member3=/dev/md/vol3
	member4=/dev/md/vol4
}

reset_env() {
	unset IMSM_DEVNAME_AS_SERIAL
	unset IMSM_NO_PLATFORM
	unset imsm_check
	unset container
	unset member0
	unset member1
	unset member2
	unset member3
	unset member4
}