#!/bin/sh
#############################################################################
#
# ipmi:		OpenIPMI Driver init script
#
# Authors:	Matt Domsch <Matt_Domsch@dell.com>
#               Chris Poblete <Chris_Poblete@dell.com>
#
# chkconfig: - 04 96
# description: OpenIPMI Driver init script
#
### BEGIN INIT INFO
# Provides: ipmidrv
# Required-Start: $localfs $remotefs $syslog
# Required-Stop: $localfs $remotefs $syslog
# Default-Start:
# Default-Stop:
# Short-Description: OpenIPMI Driver init script
# Description: OpenIPMI Driver init script
### END INIT INFO
#
# Exit Status values
# from start:
# 0 = no errors
# 1 = a necessary requested module did not load (error)
# 2 = an optional but requested module did not load (warning)
# 2 = could not create the proper /dev device node (warning)


#
#############################################################################
# for log_success_msg and friends
[ -r /lib/lsb/init-functions ] && . /lib/lsb/init-functions
# source config info
[ -r /etc/sysconfig/ipmi ] && . /etc/sysconfig/ipmi

#############################################################################
# GLOBALS
#############################################################################
MODULE_NAME="ipmi"
INTF_NUM=0

IPMI_SMB_MODULE_NAME="ipmi_smb"
IPMI_SI_MODULE_NAME="ipmi_si"
kernel=`uname -r | cut -d. -f1-2`
if [ "${kernel}" == "2.4" ]; then
    IPMI_SMB_MODULE_NAME="ipmi_smb_intf"
    IPMI_SI_MODULE_NAME="ipmi_si_drv"
fi

MODULES_INTERFACES="ipmi_imb ipmi_devintf"
MODULES_FEATURES="ipmi_watchdog ipmi_poweroff"
MODULES_HW="${IPMI_SMB_MODULE_NAME} ${IPMI_SI_MODULE_NAME}"
MODULES_BASE="ipmi_msghandler"
MODULES="${MODULES_INTERFACES} ${MODULES_FEATURES} ${MODULES_HW} ${MODULES_BASE}"


RETVAL=0
LOCKFILE=/var/lock/subsys/ipmi


#############################################################################
load_si()
{
	if [ "${IPMI_SI}" = "1" ]; then
		modprobe ${IPMI_SI_MODULE_NAME} || RETVAL=1
	fi
}

load_smb()
{
	if [ "${IPMI_SMB}" = "1" ]; then
		modprobe ${IPMI_SMB_MODULE_NAME} || RETVAL=1
	fi
}

load_hw_modules()
{
	load_si
	load_smb
}

start_watchdog()
{
	if [ "${IPMI_WATCHDOG}" = "1" ]; then
		load_hw_modules
		modprobe ipmi_watchdog ${IPMI_WATCHDOG_OPTIONS} || RETVAL=2
		if [ ! -x /sbin/udev -a ! -e /dev/watchdog ]; then
			mknod -m 0600 /dev/watchdog c 10 130 || RETVAL=2
		fi
	fi
}

stop_watchdog()
{
	modprobe -q -r ipmi_watchdog
	[ ! -x /sbin/udev ] && rm -f /dev/watchdog
}

start_powercontrol()
{
	local poweroff_opts=""
	if [ "${IPMI_POWEROFF}" = "1" ]; then
		load_hw_modules
		[ "${IPMI_POWERCYCLE}" == "1" ] && poweroff_opts="poweroff_control=2"
		modprobe ipmi_poweroff "${poweroff_opts}" || RETVAL=2
	fi
}

stop_powercontrol()
{
	modprobe -q -r ipmi_poweroff
}

#############################################################################
unload_all_ipmi_modules()
{
	[ ! -x /sbin/udev ] && rm -f "/dev/ipmi${INTF_NUM}"
	stop_watchdog
	for m in ${MODULES}; do
		modprobe -q -r ${m}
	done
}

unload_ipmi_modules_leave_features()
{
	[ ! -x /sbin/udev ] && rm -f "/dev/ipmi${INTF_NUM}"
	for m in ${MODULES_INTERFACES}; do
		modprobe -q -r ${m}
	done
	lsmod | egrep -q "ipmi_(poweroff|watchdog)"
	if [ "$?" -ne "0" ]; then
		stop_watchdog
		for m in ${MODULES}; do
			modprobe -q -r ${m}
		done
	fi
}

#############################################################################
load_ipmi_modules ()
{
	modprobe ipmi_msghandler || RETVAL=1
	load_hw_modules
	[ "${RETVAL}" = "1" ] && unload_all_ipmi_modules && return

	start_watchdog
	start_powercontrol

	if [ "${DEV_IPMI}" = "1" ]; then
		modprobe ipmi_devintf || RETVAL=2
		if [ "${RETVAL}" != "2" ]; then
			if [ ! -x /sbin/udev ]; then
				DEVMAJOR=`cat /proc/devices | awk '/ipmidev/{print $1}'`
				rm -f /dev/ipmi${INTF_NUM}
				mknod -m 0600 /dev/ipmi${INTF_NUM} c ${DEVMAJOR} 0 || RETVAL=2
			fi
		fi
	fi

	if [ "${IPMI_IMB}" = "1" ]; then
		modprobe ipmi_imb || RETVAL=2
		if [ "${RETVAL}" != "2" ]; then
			DEVMAJOR=`cat /proc/devices | awk '/imb/{print $1}'`
			rm -f /dev/imb
			mknod -m 0600 /dev/imb c ${DEVMAJOR} 0 || RETVAL=2
		fi
	fi

	# Per Corey Minyard, essentially no one uses ipmi_radisys
	# and we don't want to encourage its further use
	# so it won't be handled here.
	return
}

#############################################################################
start()
{
	echo -n $"Starting ${MODULE_NAME} drivers: "
	load_ipmi_modules > /dev/null 2>&1 
	[ "${RETVAL}" = "1" ] && log_failure_msg && return
	[ "${RETVAL}" = "2" ] && touch ${LOCKFILE} && log_warning_msg
	[ "${RETVAL}" = "0" ] && touch ${LOCKFILE} && log_success_msg
}

#############################################################################
stop()
{
	echo -n $"Stopping ${MODULE_NAME} drivers: "
	unload_ipmi_modules_leave_features
	rm -f ${LOCKFILE}
	log_success_msg
}

stop_all()
{
	echo -n $"Stopping all ${MODULE_NAME} drivers: "
	unload_all_ipmi_modules
	rm -f ${LOCKFILE}
	log_success_msg
}

#############################################################################
restart()
{
	stop_all
	start
}

#############################################################################

modules_loaded()
{
	OnePlusLoaded=0
	OnePlusUnloaded=0
	for m in $@; do
		if /sbin/lsmod | grep $m >/dev/null 2>&1 ; then
			echo "$m module loaded."
			OnePlusLoaded=1
		else
			echo "$m module not loaded."
			OnePlusUnLoaded=1
		fi
	done
}

device_node_exists()
{
	if [ -e "$1" ]; then
		echo "$1 exists."
		return 1
	fi
	echo "$1 does not exist."
	return 0
}

minimum_modules_loaded()
{
	modules_loaded ${MODULES_BASE}
	[ ${OnePlusLoaded} -eq 0 ] && return 0
	    
	modules_loaded ${MODULES_HW}
	[ ${OnePlusLoaded} -eq 0 ]  && return 0

	return 1
}

# Status return code bits
# bit 0 set = minimum modules aren't loaded
# bit 1 set = requested module isn't loaded
# bit 2 set = /dev/ipmi0 doesn't exist
# bit 3 set = /dev/watchdog doesn't exist
# bit 4 set = lockfile doesn't exist

status_all()
{
	RETVAL=0
	modules_loaded ${MODULES}
	[ ${OnePlusUnloaded} -ne 0 ] && RETVAL=$((RETVAL | 2))

	device_node_exists /dev/ipmi${INTF_NUM}
	[ $? -eq 0 ] && RETVAL=$((RETVAL | 4))

	device_node_exists /dev/watchdog
	[ $? -eq 0 ] && RETVAL=$((RETVAL | 8))

	[ ! -e ${LOCKFILE} ] && RETVAL=$((RETVAL | 16))
}

status()
{
	RETVAL=0
	minimum_modules_loaded
	[ $? -eq 0 ] && RETVAL=$((RETVAL | 1))
	
	modules_loaded ipmi_devintf
	[ ${OnePlusLoaded} -eq 0 ] && RETVAL=$((RETVAL | 2))

	device_node_exists /dev/ipmi${INTF_NUM}
	[ $? -eq 0 ] && RETVAL=$((RETVAL | 4))
}

status_watchdog()
{
	RETVAL=0
	minimum_modules_loaded
	[ $? -eq 0 ] && RETVAL=$((RETVAL | 1))

	modules_loaded ipmi_watchdog
	[ ${OnePlusLoaded} -eq 0 ] && RETVAL=$((RETVAL | 2))

	device_node_exists /dev/watchdog
	[ $? -eq 0 ] && RETVAL=$((RETVAL | 8))
}

status_powercontrol()
{
	RETVAL=0
	minimum_modules_loaded
	[ $? -eq 0 ] && RETVAL=$((RETVAL | 1))

	modules_loaded ipmi_powercontrol
	[ ${OnePlusLoaded} -eq 0 ] && RETVAL=$((RETVAL | 2))
}

#############################################################################
usage ()
{
	echo $"Usage: $0 {start|stop|status|restart|condrestart|" 1>&2
	echo $"          start-watchdog|stop-watchdog|status-watchdog" 1>&2
	echo $"          start-powercontrol|stop-powercontrol|status-powercontrol" 1>&2
	echo $"          stop-all|status-all}" 1>&2
	RETVAL=1
}

condrestart ()
{
	[ -e ${LOCKFILE} ] && restart
}

#############################################################################
# MAIN
#############################################################################
case "$1" in
	start) start ;;
	stop)  stop ;;
	restart) restart ;;
	status)	status ;;
	status-all) status_all ;;
	condrestart) condrestart ;;
	start-watchdog) start_watchdog ;;
	stop-watchdog) stop_watchdog ;;
	status-watchdog) status_watchdog ;;
	start-powercontrol) start_powercontrol ;;
	stop-powercontrol) stop_powercontrol ;;
	status-powercontrol) status_powercontrol ;;
	stop-all) stop_all ;;
	*) usage ;;
esac

exit ${RETVAL}

#############################################################################
# end of file
#############################################################################