#!/bin/sh

dir=$(dirname "$0")
. "$dir/block-common.sh"

expand_dev() {
  local dev
  case $1 in
  /*)
    dev=$1
    ;;
  *)
    dev=/dev/$1
    ;;
  esac
  echo -n $dev
}

t=$(xenstore_read "$XENBUS_PATH"/type || true)

case "$command" in 
  bind)
    p=$(xenstore_read "$XENBUS_PATH"/params)
    case $t in 
      phy)
        dev=$(expand_dev $p)
	write_dev "$dev"
	exit 0
	;;

      file)
	for dev in /dev/loop* ; do
	  echo "dev is $dev, p is $p"
	  if losetup $dev $p; then
	    write_dev "$dev"
            exit 0
	  fi
	done
	exit 1
	;;

      *)
        [ -x /etc/xen/scripts/block-"$t" ] && \
	    /etc/xen/scripts/block-"$t" bind $p
	;;
    esac
    ;;

  unbind)
    node=$(xenstore_read "$XENBUS_PATH"/node)
    case $t in 
      phy)
	exit 0
	;;

      file)
	losetup -d $node
	exit 0
	;;

      *)
        [ -x /etc/xen/scripts/block-"$t" ] && \
	    /etc/xen/scripts/block-"$t" unbind $node
	;;

    esac
    ;;

esac