#!/bin/ksh
# IBM_PROLOG_BEGIN_TAG 
# This is an automatically generated prolog. 
#  
# onc720 src/oncplus/etc/rc.nfs4ss.sh 1.5 
#  
# Licensed Materials - Property of IBM 
#  
# COPYRIGHT International Business Machines Corp. 2006,2008 
# All Rights Reserved 
#  
# US Government Users Restricted Rights - Use, duplication or 
# disclosure restricted by GSA ADP Schedule Contract with IBM Corp. 
#  
# IBM_PROLOG_END_TAG 
# @(#)62        1.5  src/oncplus/etc/rc.nfs4ss.sh, onccmds, onc720 12/16/08 14:37:13
#
# COMPONENT_NAME: nfs4
#
# FUNCTIONS: NFSv4 Grace Period Stable Storage startup 
#
# ORIGINS: 27
#

DSPMSG=/usr/bin/dspmsg
MSGCAT=cmdnfs.cat
MSGSET=67
GPBYPASS_FLAG="gpbypass"
GPON_FLAG="gp on"
SS_VERIFY_CMD=/usr/sbin/nfs4smctl
SS_LOAD_CMD=/usr/sbin/nfs4smctl
SS_LOG_FILE=sm4.grace
NFS_EXT=/usr/lib/drivers/nfs.ext

#
# This function cleans up the stable storage directory
# of all files.
#
cleanup_ss_dir()
{
target_dir=$1

	if [ -d $target_dir ]; then
		/usr/bin/rm $target_dir/* 2>&1 > /dev/null
		$DSPMSG -s $MSGSET $MSGCAT 10 'Cleanup of NFSv4 Stable Storage complete.\n'
	fi
}

#
# This function marks the stable storage log control file as being bad.
#
mark_ss_bad()
{
target_dir=$1

	if [ -d $target_dir ]; then
		#
		# overwriting log file with NULL will mark the
		# file as bad.
		#
		echo "" > $target_dir/$SS_LOG_FILE 2>&1 > /dev/null 
		$DSPMSG -s $MSGSET $MSGCAT 10 'Cleanup of NFSv4 Stable Storage complete.\n'
	fi
}
#
# This function loads the NFS extension into the kernel and then loads the
# stable storage into the extension.
#
load_ss()
{
target_dir=$1

	if [ -x $NFS_EXT ]; then
		$DSPMSG -s $MSGSET $MSGCAT 4 'Loading NFSv4 Stable Storage...'

		`$SS_LOAD_CMD -L -P $SS_PATH` 
			
		if [ $? -eq 0 ]; then
			$DSPMSG -s $MSGSET $MSGCAT 5 'Load successful.\n'
		else
			$DSPMSG -s $MSGSET $MSGCAT 6 'Load failed.\n'
		fi
	fi
}

# ---------------------------------------------------------------------	#
# ------			MAIN				 ------	#
# --------------------------------------------------------------------- #

#
# Start by getting the CMD arguments for nfsd.
# and determine if stable storage is mounted
#
cmdargs=`odmget -q subsysname=nfsd SRCsubsys 2>/dev/null | grep cmdargs | sed 's/[[:space:]]*cmdargs[[:space:]]*=[[:space:]]*//' `

# 
# Find the SS Mount Point
#

SAVED_NFSD_ARGS=`/usr/bin/odmget -q subsysname=nfsd SRCsubsys | /bin/awk 'BEGIN { FS="\"" } /cmdargs/ { print $2 }' `

SS_PATH=`echo ${SAVED_NFSD_ARGS} | /bin/awk '
        { split($0, A);
        for ( I = 1; I < NF; I++ ) {
                if (A[I] == "-P") {
                        I++;
                        print A[I];
                        continue;
                }
        }
}'`

SS_MOUNT_PT=`/usr/bin/df ${SS_PATH} | /bin/awk '
	BEGIN { flag=0; }
        { if (!flag)
        { flag=1; next; }
        if (flag) { print $7; }
        }'`

#
# Pad the mount pt. with spaces
#

MOD_SS_MNT_PT=`echo ${SS_MOUNT_PT} | /bin/awk '
	 { printf(" %s ", $1) }'`
	

dirmount=`/usr/sbin/mount 2>/dev/null | grep "$MOD_SS_MNT_PT" 2>/dev/null`

#
# If we were able to get nfsd CMD arguments, check for GP turned on
#
if [ -n "$cmdargs" ] ; then
	GPON=`echo $cmdargs | grep "$GPON_FLAG"`
	if [ -n "$GPON" ]; then
		$DSPMSG -s $MSGSET $MSGCAT 7 'Checking NFSv4 Stable Storage.\n'
		#
		# GP is turned on, but now check to see if GP bypass 
		# has been set
		#
		GPBYPASS=`echo $cmdargs | grep "$GPBYPASS_FLAG"`
		if [ -n "$GPBYPASS" ]; then
			# 
			# remove the contents of the stable storage dir
			#
			$DSPMSG -s $MSGSET $MSGCAT 8 'Bypassing NFSv4 Grace Period.\n'
			cleanup_ss_dir $SS_PATH
		else
			#
			# Make sure the stable storage directory is mounted 
			# before we try to verify and load it.
			#
			if [ -z "$dirmount" ]; then
				$DSPMSG -s $MSGSET $MSGCAT 9 'NFSv4 Stable Storage not mounted.\n'
			elif [ -x $SS_VERIFY_CMD ]; then
				#
				# Verify the Stable Storage.
				#
				$SS_VERIFY_CMD -V -P $SS_PATH 
				if [ $? -eq 0 ]; then
					# 
					# stable storage is Good.
					#
					load_ss $SS_PATH
				else
					#
					# stable storage is Bad.
					# mark it so
					#
					mark_ss_bad $SS_PATH
				fi
			fi
		fi
	fi
fi