#!/sbin/runscript
# Copyright 1999-2011 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

depend() {
	need localmount
	after bootmisc modules
}

start() {
	if [ "${LOAD_ON_START}" = "yes" ] ; then
		if ! grep zram /proc/devices >/dev/null ; then
			einfo "Loading zram module..."
			modprobe zram num_devices=${NUM_DEVICES}
			eend $?
		fi
	fi
	# exit if the driver is not yet installed
	grep zram /proc/devices >/dev/null || exit 1

	for I in `seq 0 \`expr ${NUM_DEVICES} - 1\`` ; do
		eval _a=\${ZRAM_SIZE_${I}}
		einfo "Enabling swap /dev/zram${I}..."
		if test ! -z ${_a} && test -f /sys/block/zram${I}/disksize ; then
			echo $(($_a*1024)) > "/sys/block/zram${I}/disksize"
			mkswap -L zram{I} /dev/zram${I} ${_a}
		fi
		if test -b "/dev/zram${I}" ; then
			swapon ${SWAPON_OPTS} "/dev/zram${I}"
		fi
		eend $?
	done
}

stop() {
	for I in `seq 0 \`expr ${NUM_DEVICES} - 1\`` ; do
		einfo "Disabling swap /dev/zram${I}..."
		swapoff "/dev/zram${I}" && \
		echo 1 > "/sys/block/zram${I}/reset"
		eend $?
	done

	if [ "${UNLOAD_ON_STOP}" = "yes" ] && grep zram /proc/modules >/dev/null  ; then
		einfo "Unloading zram module..."
		rmmod zram
		eend $?
	fi
}

info() {
	for I in `seq 0 \`expr ${NUM_DEVICES} - 1\`` ; do
		zram_stats "/dev/zram${I}"
	done
}

reload() {
	for I in `seq 0 \`expr ${NUM_DEVICES} - 1\`` ; do
		swapoff "/dev/zram${I}" && \
		echo 1 > "/sys/block/zram${I}/reset"
		swapon ${SWAPON_OPTS} "/dev/zram${I}"
	done
}

restart() {
	stop
	start
}