source: gpfs_3.1_ker2.6.20/lpp/mmfs/samples/nfscluster/preunmount @ 152

#!/bin/ksh
# @(#)84        1.5.1.6  src/avs/fs/mmfs/samples/nfscluster/preunmount, mmfs, avs_rgpfs24, rgpfs24s010a 1/29/07 03:24:33 
##############################################################################
#
# When properly installed, this script is invoked by the GPFS daemon during
# normal or abnormal shutdown cleanup processing.
#
# The script is invoked with one parameter which represents the status of
# the GPFS daemon.  The possible values are:
#   down    - this is normal shutdown processing as a result of a mmshutdown
#             command.  The GPFS daemon will not be restarted.
#   active  - this is abnormal shutdown processing as a result of some
#             unrecoverable condition.  The GPFS daemon will be restarted.
#
# If this is a normal shutdown, GPFS has already unmounted all file systems.
#
# If this is abnormal shutdown, GPFS leaves the file systems mounted and
# will attempt to remount them after the daemon restarts.  If you do not
# wish the file systems to be automatically remounted, add the appropriate
# umount commands in this script.
#
# You can also use this script to add any commands to clean up local state
# before the GPFS daemon restarts.
#
# If GPFS was started with the -T option (activate tracing) on the mmstartup
# command, trace records have already been cut prior to invoking this script.
# If you want to disable on a particular node the automatic trace handling,
# run the following command on the desired nodes:
#      touch /var/mmfs/etc/ignoreMMTRACE
#
# If you have disabled the automatic trace handling, or if you have started
# tracing with the mmtrace command, add the appropriate trace handling commands.
#
#
# To activate the code:
#
#   a) edit this script and make the appropriate changes
#   b) copy this script to /var/mmfs/etc/preunmount
#   c) ensure this script is executable (chmod +x preunmount)
#
##############################################################################

# Process the parameters.
if [ ! -f /var/mmfs/etc/nfsfuncs ]; then
    echo "$0: Can't find NFS functions in /var/mmfs/etc"
    exit 0
fi
. /var/mmfs/etc/nfsfuncs

device=$1
reason=$2
debugmsg $0: device=$device reason=$reason

# stop NFS only if the devide was exported or used for HA-NFS shared information
if [[ "$reason" == "SGPanic" ]]; then
    isExported $device
    rc1=$?
    isSharedRoot $device
    rc2=$?
    if [[ $rc1 -ne 0 && $rc2 -ne 0 ]]; then
        debugmsg $0: ignore device=$device umount
        return 0
    fi
fi

if [[ "$reason" == "SGPanic" || "$reason" == "Shutdown" || "$reason" == "umount" ]]; then
  /var/mmfs/etc/nfsmonitor -e
  /var/mmfs/etc/stop.nfs
fi

if [[ "$reason" == "SGPanic" ]]; then
  debuglog touch /tmp/ha-nfs-reboot
  debugmsg "Stopping GPFS..."
  if [[ "$REBOOT" == "1" ]]; then
    reboot -f
  else
    /etc/init.d/gpfs stop
  fi
fi

if [[ "$reason" == "Shutdown" ]]; then
  _unlink /tmp/ha-nfs-reboot
fi

return 0