#!/bin/bash

# Copyright (c) 2005 Oracle
# All rights reserved.
#
# Copyright (c) 2011 Source Mage Team
# Vlad Glagolev

. /etc/sysconfig/ocfs2

PROGRAM=/bin/false
RUNLEVEL=3
NEEDS="+local_fs +network"

. /etc/init.d/smgl_init

MOUNT="/bin/mount"
UMOUNT="/bin/umount"
O2CB_CTL="/sbin/o2cb_ctl"

OCFS2_CLUSTER=$( sed -re 's/[[:space:]]+//g' $OCFS2_CONFIG | grep -A4 "cluster:" | grep 'name=' | cut -d= -f2 )

function check_pseudofs() {
  if [ -z "`$MOUNT -l -t configfs`" ] || [ -z "`$MOUNT -l -t ocfs2_dlmfs`" ]; then
    echo "One or more pseudo-filesystems required for OCFS2 are not mounted."
    echo "Make sure you have following lines in your /etc/fstab:"
    echo "none		/config		configfs	defaults	0 0"
    echo "none		/dlm		ocfs2_dlmfs	defaults	0 0"

    return 1
  fi
}

function ocfs2mounts() {
    LC_ALL=C awk '$3 == "ocfs2" { print $2 }' /proc/mounts
}

function ocfs2fstab() {
    LC_ALL=C awk '!/^#/ && $3 == "ocfs2" && $4 !~ /noauto/ { print $2 }' /etc/fstab
}

start() {
  check_pseudofs || exit 1

  echo "Starting OCFS2 cluster..."

  for cluster in ${OCFS2_CLUSTER}; do
    $O2CB_CTL -H -n ${cluster} -t cluster -a online=yes >/dev/null 2>&1
    evaluate_retval
  done
}

stop() {
  echo "Unmounting OCFS2 filesystems..."

  remaining="`ocfs2mounts`"
  retry=3

  while [ -n "$remaining" -a "$retry" -gt 0 ]; do
    $UMOUNT -a -t ocfs2 2>/dev/null
    sleep 1

    remaining="`ocfs2mounts`"

    [ -z "$remaining" ] && break

    retry=$(($retry - 1))
  done

  if [ ! -z "$remaining" ]; then
    print_status failure
    exit 1
  fi

  echo "Stopping OCFS2 cluster..."

  for cluster in ${OCFS2_CLUSTER}; do
    $O2CB_CTL -H -n ${cluster} -t cluster -a online=no >/dev/null 2>&1
    evaluate_retval
  done
}

restart() {
  echo "Restarting OCFS2 cluster..."

  stop
  sleep 1
  start
}

status() {
  if [ -f /proc/mounts ]; then
    [ -n "`ocfs2fstab`" ] && echo "Configured OCFS2 mountpoints: " `ocfs2fstab`
    [ -n "`ocfs2mounts`" ] && echo "Active OCFS2 mountpoints: " `ocfs2mounts`
  fi
}