#!/bin/sh
#
# $NetBSD: lvm,v 1.8 2021/08/21 23:00:30 andvar Exp $
#

# PROVIDE: lvm
# REQUIRE: root devpubd
# BEFORE:  DISKS

$_rc_subr_loaded . /etc/rc.subr

name="lvm"
rcvar=$name
start_cmd="lvm_start"
stop_cmd="lvm_stop"

ifs_restore="$IFS";

lvm_start()
{
	if [ -x /sbin/dmsetup ]; then
		/sbin/dmsetup version >/dev/null
		if [ $? -ne 0 ]; then
			warn "Device-mapper not present in kernel"
			return 1;
		fi
	fi

	if [ -x /sbin/lvm ]; then
		echo "Configuring lvm devices."

		# Scan for all available VG's
		/sbin/lvm vgscan --mknodes --ignorelockingfailure >/dev/null

		# Activate all LV's and create appropriate nodes in /dev
		/sbin/lvm vgchange --ignorelockingfailure -a y >/dev/null
		LV_LIST=$(/sbin/lvm vgdisplay -C -o vg_name --noheadings 2>/dev/null)
		echo " Activated Volume Groups:" $LV_LIST
	fi
}

lvm_stop()
{
	if [ -x /sbin/dmsetup ]; then
		/sbin/dmsetup version >/dev/null
		if [ $? -ne 0 ]; then
			warn "Device-mapper not present in kernel"
			return 1;
		fi
	fi

	if [ -x /sbin/lvm ]; then
		echo "Unconfiguring lvm devices."

		LOGICAL_VOLUMES=$(/sbin/lvm lvdisplay -C -o vg_name,lv_name \
			-O vg_name --separator \/ --noheadings 2>/dev/null)
		VOLUME_GROUPS=$(/sbin/lvm vgdisplay -C -o vg_name \
			--separator " " --noheadings 2>/dev/null)

		for lv in ${LOGICAL_VOLUMES}; do
			LV_IS_ACTIVE=$(/sbin/lvm lvdisplay -C --noheadings \
				-o lv_attr $lv)
			case $LV_IS_ACTIVE in
			*a*)
				echo "  Shutting Down logical volume: ${lv}"
				/sbin/lvm lvchange -an --ignorelockingfailure \
					-P ${lv} >/dev/null
				;;
			esac
		done

		for vg in ${VOLUME_GROUPS}; do
			# Set IFS to field separator
			IFS=":"
			set -- $(/sbin/lvm vgdisplay -cA ${vg} 2>/dev/null)
			# The seventh parameter is number of opened LVs in a Volume Group
			VG_HAS_ACTIVE_LV=$7
			IFS="$ifs_restore";

			if [ "${VG_HAS_ACTIVE_LV}" = 0 ]; then
				echo "  Shutting Down volume group: ${vg}"
				/sbin/lvm vgchange -an --ignorelockingfailure \
					-P ${vg} >/dev/null
			fi
		done
	fi
}

load_rc_config $name
run_rc_command "$1"