#!/sbin/runscript
#
# dellomsa-drivers
#
#           Dell OMSA driver module loading script
#
#           This script takes care of loading correct driver modules
#	    (if available) for the OpenManage Server Administrator.
#	    It checks that the server really is Dell and finds out
#	    which environment driver to load (dcdesm/dcdtvm/dcdipm).
#	    Module "dcdbas" is the base module and is always loaded.
#	    This script also creates necessary devices nodes in /dev.
#

OMSADIR=/opt/dell/srvadmin

depend() {
	use logger net
}

checkconfig() {
	if [ ! -d ${OMSADIR} ]; then
		eerror "Directory ${OMSADIR} does not exist"
		return 1
	fi
	if [ ! -x ${OMSADIR}/hapi/bin/dchcfg32 ]; then
		eerror "File ${OMSADIR}/hapi/bin/dchcfg32 does not exist"
		return 1
	fi
	if [ ! -x ${OMSADIR}/omil/prereqcheck/sysreport ]; then
		eerror "File ${OMSADIR}/omil/prereqcheck/sysreport does not exist"
		return 1
	fi
}

checkmodules() {
    	# check that the system is Dell (output contains "System ID" if Dell)
    	${OMSADIR}/omil/prereqcheck/sysreport | grep -q "System ID" && true
    	if [ $? -ne 0 ]; then
        	eerror "Non-Dell system, not loading drivers."
        	return 1
    	fi

    	# get the running kernel version
    	KVER=`/bin/uname -r`

    	# check that the modules exist
    	MODULESMISSING=0
    	MODULES="dcdbas dcdtvm dcdesm dcdipm"
    	for MODULE in ${MODULES}; do
        	if [ ! -f /lib/modules/${KVER}/extra/${MODULE}.ko ]; then
	    		# some of the modules are missing
            		eerror "driver modules unavailable for ${KVER}"
            		return 1
        	fi
    	done
}

loadmodules() {
	ebegin "Loading base dell module"
    	# first load the base module "dcdbas"
    	/sbin/modprobe dcdbas
	eend $?

    	# check that dcdbas is now listed in /proc/devices
    	grep -q dcdbas /proc/devices && true
    	if [ $? -ne 0 ]; then
        	eerror "Error! Something is really wrong: dcdbas module was loaded"
        	eerror "successfully, but dcdbas is not listed in /proc/devices!"
        	return 1
    	fi

    	# re-create required device nodes in /dev

    	# base device node is always re-created
    	EsmBASDevMAJOR=`grep dcdbas /proc/devices | awk '{print $1}'`
    	if [ -e /dev/EsmBASDev0 ]; then # /dev/EsmBASDev exists
        	rm -f /dev/EsmBASDev0
    	fi
    	mknod -m 0600 /dev/EsmBASDev0 c ${EsmBASDevMAJOR} 0
    	ln -sf /dev/EsmBASDev0 /dev/EsmBASDev

    	# find out which environment module to use (dcdesm|dcdtvm|dcdipm)
	export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:${OMSADIR}/hapi/bin/
    	${OMSADIR}/hapi/bin/dchcfg32 command=getsystype >/dev/null 2>&1 && true
    	case "$?" in
        	1) # TVM
            		ebegin "Loading [TVM]"
            		/sbin/modprobe dcdtvm
            		EsmTVMDevMAJOR=`grep dcdtvm /proc/devices | awk '{print $1}'`
            		if [ -e /dev/EsmTVMDev0 ]; then # /dev/EsmTVMDev exists
                		rm -f /dev/EsmTVMDev0
            		fi
            		mknod -m 0600 /dev/EsmTVMDev0 c ${EsmTVMDevMAJOR} 0
            		ln -sf /dev/EsmTVMDev0 /dev/EsmTVMDev
			eend $?
            		;;
        	2) # ESM
            		ebegin "Loading [ESM]"
            		/sbin/modprobe dcdesm
            		EsmESMDevMAJOR=`grep dcdesm /proc/devices | awk '{print $1}'`
            		if [ -e /dev/EsmESM2Dev0 ]; then # /dev/EsmESM2Dev exists
                		rm -f /dev/EsmESM2Dev0
            		fi
            		mknod -m 0600 /dev/EsmESM2Dev0 c ${EsmESMDevMAJOR} 0
            		ln -sf /dev/EsmESM2Dev0 /dev/EsmESM2Dev
			eend $?
            		;;
        	4) # IPMI
            		ebegin "Loading [IPMI]"
            		/sbin/modprobe dcdipm
            		EsmIPMDevMAJOR=`grep dcdipm /proc/devices | awk '{print $1}'`
            		if [ -e /dev/EsmIPMDev0 ]; then # /dev/EsmIPMDev exists
                		rm -f /dev/EsmIPMDev0
            		fi
            		mknod -m 0600 /dev/EsmIPMDev0 c ${EsmIPMDevMAJOR} 0
            		ln -sf /dev/EsmIPMDev0 /dev/EsmIPMDev
			eend $?
            		;;
        	*) # unknown or none
            		einfo "unknown env. platform, env. driver not loaded."
            		;;
    	esac
}
start(){
	checkconfig || return 1
	checkmodules || return 1
	loadmodules
}

stop() {
	ebegin "Unloading dell drivers"
    	/sbin/rmmod dcdtvm >/dev/null 2>&1 && true
   	/sbin/rmmod dcdesm >/dev/null 2>&1 && true
    	/sbin/rmmod dcdipm >/dev/null 2>&1 && true
    	/sbin/rmmod dcdbas >/dev/null 2>&1 && true
	eend $?
}