#!/sbin/runscript
# Copyright 1999-2006 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/sys-fs/ocfs2-tools/files/ocfs2.init,v 1.1 2006/07/20 05:13:14 dberkholz Exp $

depend() {
	need net localmount
	before netmount 
}

check_modules() {
	local MODULES="ocfs2_dlmfs ocfs2 ocfs2_dlm ocfs2_nodemanager configfs"
	local MODULE
	local retval=0
	
	for MODULE in ${MODULES}; do
		if ! ls -1 /sys/module | egrep -q "^${MODULE}$"; then
			retval=1
		fi
	done

	if [ ${retval} -eq 1 ] || ! egrep -q '\s*ocfs2\s*$' /proc/filesystems || ! egrep -q '\s*ocfs2_dlmfs\s*$' /proc/filesystems; then 
		ewarn "One or more required modules are not loaded."
                ewarn "Make sure you have "
                ewarn " - placed ocfs, dlmfs and configfs into /etc/modules.autoload.d/kernel-2.6 or built directly into the kernel."
                ewarn "For a (in)complete documentation, read /usr/share/doc/ocfs-<version>/INSTALL.GENTOO.bz2"
	fi
	return ${retval}
}

check_pseudofs() { 
	local retval=0
	local HASMOUNT="mount -l -t"
	if [ -z "`${HASMOUNT} configfs`" ] ; then
		retval=1
	fi
	if [ -z "`${HASMOUNT} ocfs2_dlmfs`" ] ; then
		retval=1
	fi

	if [ ${retval} -eq 1 ]; then
		ewarn "One or more pseudo-filesystes are not mounted."
		ewarn "Make sure you have following lines in your /etc/fstab:"
		ewarn "none         /sys/kernel/config         configfs        defaults                0 0"
		ewarn "none         /dlm                       ocfs2_dlmfs     defaults                0 0"
		ewarn "For a (in)complete documentation, read /usr/share/doc/ocfs-<version>/INSTALL.GENTOO.bz2"
	fi
	return ${retval}
}



start() {
	check_modules || return $? 
	check_pseudofs || return $?
	
	einfo "Starting OCFS2 cluster"
	for cluster in ${OCFS2_CLUSTER}; do
		ebegin " - ${cluster}"
		/sbin/o2cb_ctl -H -n ${cluster} -t cluster -a online=yes >/dev/null 2>&1
		eend $?

		# Some heartbeat tweaks to prevent self-fencing quite so much during heavy load.
		# http://oss.oracle.com/projects/ocfs2/dist/documentation/ocfs2_faq.html

		# How long to wait before a node is considered dead from lack of network activity.
		echo $OCFS2_IDLE_TIMEOUT_MS > /sys/kernel/config/cluster/${cluster}/idle_timeout_ms
		# How often we should attempt to send heartbeats.
		echo $OCFS2_KEEPALIVE_DELAY_MS > /sys/kernel/config/cluster/${cluster}/keepalive_delay_ms
		echo $OCFS2_RECONNECT_DELAY_MS > /sys/kernel/config/cluster/${cluster}/reconnect_delay_ms
		# How many interations before a node is considered dead from lack of IO activity.
		# (dead_threshold - 1) * 2s
		echo $OCFS2_DEAD_THRESHOLD > /sys/kernel/config/cluster/${cluster}/heartbeat/dead_threshold
	done
	sleep 2
}

stop() {
	# Shamelesly stolen from netmount
        local ret
        ebegin "Unmounting OCFS2 filesystems"
        [ -z "$(umount -art ocfs2 2>&1)" ]
        ret=$?
        eend ${ret} "Failed to simply unmount filesystems"
        [ ${ret} -eq 0 ] && return 0

        declare -a siglist=( "TERM" "KILL" "KILL" )
        local retry=0
        local remaining="go"

        while [ -n "${remaining}" -a ${retry} -lt 3 ]
        do
                remaining="$(awk '$3 ~ /'ocfs2'/ { if ($2 != "/") print $2 }' /proc/mounts | sort -r)"
                IFS=$'\n'
                set -- ${remaining//\\040/ }
                unset IFS
                [ -z "${remaining}" ] && break

                ebegin $'\t'"Unmounting ocfs2 filesystems (retry #$((retry+1)))"
                /bin/fuser -k -${siglist[$((retry++))]} -m "$@" &>/dev/null
                sleep 5
                umount "$@" &>/dev/null
                eend $? $'\t'"Failed to unmount filesystems"
        done

	
	einfo "Stopping OCFS2 cluster" 
	for cluster in ${OCFS_CLUSTERS}; do
		ebegin " - ${cluster}"
		/sbin/o2cb_ctl -H -n ${cluster} -t cluster -a online=no >/dev/null 2>&1
		eend $?
	done
}