#!/bin/sh

# Usage: block-enbd [bind server ctl_port |unbind node]
#
# The file argument to the bind command is the file we are to bind to a
# loop device.  We print the path to the loop device node to stdout.
#
# The node argument to unbind is the name of the device node we are to
# unbind.
#
# This assumes you're running a correctly configured server at the other end!

case $1 in
	bind)
		for dev in /dev/nd*; do
			if nbd-client $2:$3 $dev; then
				echo $dev
				exit 0
			fi
		done
		exit 1
	;;

	unbind)
		nbd-client -d $2
		exit 0
	;;

	*)
		echo 'Unknown command: ' $1 >&2
		echo 'Valid commands are: bind, unbind' >&2
		exit 1
esac