#!/sbin/runscript
# Copyright 1999-2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id$

description="Linux-iSCSI.org target"

depend() {
	after modules
	use net
}

MODNAME="target_core_mod"

TCM_CFS_DIR="/sys/kernel/config/target/core"
LIO_CFS_DIR="/sys/kernel/config/target/iscsi"
TCM_NODE="/usr/sbin/tcm_node"
LIO_NODE="/usr/sbin/lio_node"
TCM_FABRIC="/usr/sbin/tcm_fabric"
CONFIGFS_SCRIPT_DIR="/etc/target"
TCM_CONFIGFS_SCRIPT="/etc/target/tcm_start.sh"
LIO_CONFIGFS_SCRIPT="/etc/target/lio_start.sh"
TCM_CORE_MODULE="target_core_mod"
TCM_CORE_IO_MODULES="target_core_iblock target_core_file target_core_pscsi"
FABRICS_MODULES="tcm_fc tcm_loop ib_srpt"
LIO_MODULE="iscsi_target_mod"

checkconfig() {
	if ! modinfo ${TCM_CORE_MODULE} > /dev/null 2>&1 ; then
		eerror "Target Core modules not found!"
		return 1
	elif ! modinfo ${LIO_MODULE} > /dev/null 2>&1 ; then
		eerror "Linux iSCSI modules not found!"
		return 1
	elif [ ! -f ${TCM_CONFIGFS_SCRIPT} ]; then
		eerror "${TCM_CONFIGFS_SCRIPT} does not exist. run targetcli to configure your target!"
		return 1
	elif [ ! -f ${LIO_CONFIGFS_SCRIPT} ]; then
		eerror "${LIO_CONFIGFS_SCRIPT} does not exist. run targetcli to configure your target!"
		return 1
	fi
}

fabrics_start() {
	ebegin "Starting Targets: "
	for module in ${FABRICS_MODULES}; do
		if modinfo $module > /dev/null 2>&1 ; then
			ebegin "Loading ${module}"
			modprobe ${module}
			eend $?
		fi
	done
	for cfgscript in ${CONFIGFS_SCRIPT_DIR}/*.sh; do
		if [ ! -f ${cfgscript} ]; then
			continue
		fi
		# target core is handled in tcm_start
		if [ ${cfgscript} == ${TCM_CONFIGFS_SCRIPT} ]; then
			continue
		fi
		# iscsi-target fabric module is handled in lio_target_start
		if [ ${cfgscript} == ${LIO_CONFIGFS_SCRIPT} ]; then
			continue
		fi
		ebegin "Calling ConfigFS script $cfgscript: "
		sh ${cfgscript} > /dev/null 2>&1
		eend $?
	done
	eend $?
}

lio_target_start() {
	ebegin "Loading iSCSI target modules: ${LIO_MODULE}"
	modprobe ${LIO_MODULE}
	eend $?
	ebegin "Configuring iSCSI target iscsi_target_mod"
	sh ${LIO_CONFIGFS_SCRIPT} > /dev/null 2>&1
	eend $?
}

tcm_start() {
	ebegin "Loading Target Core modules : ${TCM_CORE_MODULE}"
	modprobe ${TCM_CORE_MODULE}
	eend $?
	ebegin "Loading Target Core backend modules: "
	for module in ${TCM_CORE_IO_MODULES} ; do
		ebegin "${module}"
		modprobe ${module}
		eend $?
	done
	eend $?
	ebegin "Calling ConfigFS script $TCM_CONFIGFS_SCRIPT for target_core_mod"
	sh ${TCM_CONFIGFS_SCRIPT} > /dev/null 2>&1
	eend $?
}

lio_target_stop() {
	ebegin "Unload Linux-iSCSI.org Fabric module"
	${LIO_NODE} --unload
	eend $?
}

fabrics_stop() {
	ebegin "Unloading misc fabric modules: "
	${TCM_FABRIC} --unloadall
	eend $?
}

tcm_stop() {
	ebegin "Unloading Target Core modules: "
	$TCM_NODE --unload
	eend $?
}

start() {
	checkconfig
	tcm_start
	lio_target_start
	fabrics_start
}

stop() {
	lio_target_stop
	fabrics_stop
	tcm_stop
}

status() {
	if [[ -d ${TCM_CFS_DIR} && -d ${LIO_CFS_DIR} ]]; then
		einfo "Target core mode status"
		${TCM_NODE} --listhbas
		einfo "Linux iSCSI status"
		${LIO_NODE} --listendpoints
	else
		einfo "Target not started (yet)"
	fi
}