#!/bin/sh## $Id: Filesystem.in,v 1.2 2005/01/03 06:25:28 alan Exp $# # Filesystem#      Description: Manages a Filesystem on a shared storage medium.#  Original Author: Eric Z. Ayers (eric.ayers@compgen.com)# Original Release: 25 Oct 2000#          Support: linux-ha-dev@lists.tummy.com## usage: ./Filesystem <device> <directory> <fstype> [<options>] {start|stop|status}##<device>    : name of block device for the filesystem. e.g. /dev/sda1, /dev/md0#		Or a -U or -L option for mount, or an NFS mount specification#<directory> : the mount point for the filesystem#<fstype>    : name of the filesystem type. e.g. ext2#<options>   : options to be given to the mount command via -o### An example usage in /etc/ha.d/haresources: #       node1  10.0.0.170 Filesystem::/dev/sda1::/data1::ext2#  or#       node1  10.0.0.170 Filesystem::-Ldata1::/data1::ext2#  or#       node1  10.0.0.170 Filesystem::server:/data1::/data1::nfs::ro## This assumes you want to manage a filesystem on a shared (scsi) bus.# Do not put this filesystem in /etc/fstab.  This script manages all of# that for you.## If you are interested in High Availability, you will probably also want# some sort of external hardware RAID controller in front of the actual # disks.  I don't mean a RAID controller embedded in the host controller -# it has to be a external controller.## It can also be an internal RAID controller if the controller supports# failover.  IBM's ServeRAID controller does this, and it automatically# prohibits concurrent access too, so it's pretty cool in this application.## There is a script for software RAID-1 included in this directory.  Right # now, I wouldn't recommend using software RAID (see notes in the Raid1 script)## NOTE: There is no locking (such as a SCSI reservation) being done here.#       I would if the SCSI driver could properly maintain the reservation,#       which it cannot, even with the 'scsi reservation' patch submitted#       earlier this year by James Bottomley.  The patch minimizes the#       bus resets caused by a RESERVATION_CONFLICT return, and helps the #       reservation stay when 2 nodes contend for a reservation, #       but it does not attempt to recover the reservation in the #       case of a bus reset.  ##       What all this means is that if 2 nodes mount the same file system#       read-write, the filesystem is going to become corrupted.##	As a result, you should use this together with the stonith option#	and redundant, independent communications paths.##	If you don't do this, don't blame us when you scramble your disk.# #	Note:  the ServeRAID controller does prohibit concurrent acess#	In this case, you don't actually need STONITH, but redundant comm is#	still an excellent idea.#unset LC_ALL; export LC_ALLunset LANGUAGE; export LANGUAGEprefix=@prefix@exec_prefix=@exec_prefix@#. @sysconfdir@/ha.d/shellfuncs. /etc/ha.d/shellfuncs# Utilities used by this scriptMODPROBE=@MODPROBE@FSCK=@FSCK@FUSER=@FUSER@MOUNT=@MOUNT@UMOUNT=@UMOUNT@BLOCKDEV=@BLOCKDEV@check_util () {    if [ ! -x "$1" ] ; then	ha_log "ERROR: setup problem: Couldn't find utility $1"	exit 1    fi}usage() {cat <<-EOT;	usage: $0 <device> <directory> <fstype> [<options>] {start|stop|status}	<device>    : name of block device for the filesystem. e.g. /dev/sda1, /dev/md0	              OR -LFileSystemLabel OR -Uuuid or an NFS specification	<directory> : the mount point for the filesystem	<fstype>    : name of the filesystem type. e.g. ext2	<options>   : options to be given as -o options to mount.	$Id: Filesystem.in,v 1.2 2005/01/03 06:25:28 alan Exp $	EOT}##	Make sure the kernel does the right thing with the FS buffers#	This function should be called after unmounting and before mounting#	It may not be necessary in 2.4 and later kernels, but it shouldn't hurt#	anything either...##	It's really a bug that you have to do this at all...#flushbufs() {  if    [ "$BLOCKDEV" != "" -a -x "$BLOCKDEV" ]  then    case $1 in      -*|[^/]*:/*)	;;      *)		$BLOCKDEV --flushbufs $1;;    esac  fi}# Check the arguments passed to this scriptDEVICE=$1MOUNTPOINT=$2FSTYPE=$3case $# in  4)	operation=$4; options="";;  5)	operation=$5; options="-o $4";;  *)	usage; exit 1;;esaccase $DEVICE in  -*) # Oh... An option to mount instead...  Typically -U or -L	;;  [^/]*:/*)	# An NFS filesystem specification...	;;  *)	if [ ! -b "$DEVICE"  -a "$operation" != stop ]; then	  ha_log "ERROR: Couldn't find device $DEVICE. Expected /dev/??? to exist"	  usage	  exit 1	fi;;esacif [ ! -d "$MOUNTPOINT" ] ; then	ha_log "ERROR: Couldn't find directory  $MOUNTPOINT to use as a mount point"	usage	exit 1	fi	# Check to make sure the utilites are foundcheck_util $MODPROBEcheck_util $FSCKcheck_util $FUSERcheck_util $MOUNTcheck_util $UMOUNT  # Look for the 'start', 'stop' or status argumentcase "$operation" in## START: Start up the filesystem#start)	# See if the device is already mounted.	$MOUNT | cut -d' ' -f3 | grep -e "^$MOUNTPOINT$" >/dev/null	if [ $? -ne 1 ] ; then	    ha_log "ERROR: Filesystem $MOUNTPOINT is already mounted!"	    exit 1;	fi	# Insert SCSI module	$MODPROBE scsi_hostadapter >/dev/null 2>&1	# Insert Filesystem module	$MODPROBE $FSTYPE >/dev/null 2>&1	grep -e "$FSTYPE"'$' /proc/filesystems >/dev/null	if [ $? != 0  ] ; then		ha_log "ERROR: Couldn't find filesystem $FSTYPE in /proc/filesystems"		usage		exit 1	fi	# Check the filesystem & auto repair.  	# NOTE: Some filesystem types don't need this step...  Please modify	#       accordingly	if	  case $FSTYPE in	    ext3|reiserfs|xfs|jfs|vfat|fat|nfs)	false;;	    *)				true;;	  esac        then	  ha_log "info: Starting filesystem check on $DEVICE"	  $FSCK -t $FSTYPE -a $DEVICE		  # NOTE: if any errors at all are detected, it returns non-zero	  # if the error is >4 then there is a big problem	  if	    [ $? -ge 4 ]	  then	    ha_log "ERROR: Couldn't sucessfully fsck filesystem for $DEVICE"	    exit 1		  fi		fi	flushbufs $DEVICE	# Mount the filesystem.	if	  $MOUNT -t $FSTYPE $options $DEVICE $MOUNTPOINT        then	  : Mount worked!        else	  ha_log "ERROR: Couldn't mount filesystem $DEVICE on $MOUNTPOINT"	  exit 1	fi# end of start);;## STOP: Unmount the filesystem#stop)	# See if the device is currently mounted	if	  $MOUNT | grep -e " on $MOUNTPOINT " >/dev/null	then		# Kill all processes open on filesystem		$FUSER -mk $MOUNTPOINT		# Get the current real device name...		# (specified devname could be -L or -U...)		DEV=`$MOUNT | grep "on $MOUNTPOINT " | cut -d' ' -f1`		# Unmount the filesystem		$UMOUNT $MOUNTPOINT		if [ $? -ne 0 ] ; then			ha_log "ERROR: Couldn't unmount $MOUNTPOINT"			exit 1		fi		flushbufs $DEV	else		ha_log "WARNING: Filesystem $MOUNTPOINT not mounted?"	fi# end of stop);;## STATUS: is the filesystem mounted or not?#status)	$MOUNT | grep -e "on $MOUNTPOINT " >/dev/null	if [ $? = 0 ] ; then		echo "$MOUNTPOINT is mounted (running)"	else		echo "$MOUNTPOINT is unmounted (stopped)"	fi# end of status);;*)    echo "This script should be run with a fourth argument of 'start', 'stop', or 'status'"    usage    exit 1;;esac# If you got to this point, chances are everything is O.K.exit 0;