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#!/bin/bash
#
# Copyright (C) 2010 Red Hat, Inc. All rights reserved.
#
# This file is part of the device-mapper-multipath package.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions
# of the GNU General Public License v.2.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

#
# Simple editting of /etc/multipath.conf
# This program was largely ripped off from lvmconf
#

unset ENABLE FIND FRIENDLY PROPERTY FOREIGN MODULE MULTIPATHD HAVE_DISABLE HAVE_WWID_DISABLE HAVE_FIND HAVE_BLACKLIST HAVE_EXCEPTIONS HAVE_DEFAULTS HAVE_FRIENDLY HAVE_PROPERTY HAVE_FOREIGN HAVE_MULTIPATHD HAVE_MODULE HAVE_OUTFILE SHOW_STATUS CHANGED_CONFIG WWID_LIST HAVE_OPTION OPTION_NAME OPTION_VALUE

DEFAULT_CONFIG="# device-mapper-multipath configuration file

# For a complete list of the default configuration values, run either:
# # multipath -t
# or
# # multipathd show config

# For a list of configuration options with descriptions, see the
# multipath.conf man page.

defaults {
	user_friendly_names yes
	find_multipaths yes
	enable_foreign \"^$\"
}

blacklist_exceptions {
        property \"(SCSI_IDENT_|ID_WWN)\"
}"

CONFIGFILE="/etc/multipath.conf"
OUTPUTFILE="/etc/multipath.conf"
MULTIPATHDIR="/etc/multipath"
TMPFILE="/etc/multipath/.multipath.conf.tmp"
WWIDS=0

function usage
{
	echo "usage: $0 <command>"
	echo ""
	echo "Commands:"
	echo "Enable: --enable "
	echo "Disable: --disable"
	echo "Only allow certain wwids (instead of enable): --allow <WWID>"
	echo "Set user_friendly_names (Default y): --user_friendly_names <y|n>"
	echo "Set find_multipaths (Default y): --find_multipaths <yes|no|strict|greedy|smart>"
	echo "Set default property blacklist (Default y): --property_blacklist <y|n>"
	echo "Set enable_foreign to show foreign devices (Default n): --enable_foreign <y|n>"
	echo "Add/Change/Remove option in defaults section: --option <option_name>:<value>"
	echo "Load the dm-multipath modules on enable (Default y): --with_module <y|n>"
	echo "start/stop/reload multipathd (Default n): --with_multipathd <y|n>"
	echo "select output file (Default /etc/multipath.conf): --outfile <FILE>"
	echo ""
}

function add_wwid
{
	INDEX=0
	while [ "$INDEX" -lt "$WWIDS" ] ; do
		if [ "$1" = "${WWID_LIST[$INDEX]}" ] ; then
			return
		fi
		((INDEX++))
	done
	WWID_LIST[$WWIDS]="$1"
	((WWIDS++))
}

function get_dm_deps
{
	shift 3
	while [ -n "$1" -a -n "$2" ]; do
		MAJOR=$(echo $1 | tr -d '(,')
		MINOR=$(echo $2 | tr -d ')')
		UUID=`dmsetup info -c --noheadings -o uuid -j $MAJOR -m $MINOR  2> /dev/null`
		if [ -n "$UUID" ] ; then
			set_dm_wwid $UUID
		fi
		shift 2
	done
}

function set_dm_wwid
{
	if [[ "$1" =~ ^part[[:digit:]]+-mpath- ]] ; then
		add_wwid "${1##part*-mpath-}"
	elif [[ "$1" =~ ^mpath- ]] ; then
		add_wwid "${1##mpath-}"
	else
		get_dm_deps `dmsetup deps -u $1`
	fi
}

function set_wwid
{
	UUID=""
	if [[ "$1" =~ ^[[:digit:]]+:[[:digit:]]+$ ]] ; then
		MAJOR=${1%%:*}
		MINOR=${1##*:}
		UUID=`dmsetup info -c --noheadings -o uuid -j $MAJOR -m $MINOR  2> /dev/null`
	else
		UUID=`dmsetup info -c --noheadings -o uuid $1 2> /dev/null`
	fi
	if [ -n "$UUID" ] ; then
		set_dm_wwid $UUID
	else
		add_wwid "$1"
	fi
}

function parse_args
{
	while [ -n "$1" ]; do
		case $1 in
			--enable)
				ENABLE=1
				shift
				;;
			--disable)
				ENABLE=0
				shift
				;;
			--allow)
				ENABLE=2
				if [ -n "$2" ]; then
					set_wwid $2
					shift 2
				else
					usage
					exit 1
				fi
				;;
			--user_friendly_names)
				if [ -n "$2" ]; then
					FRIENDLY=$2
					shift 2
				else
					usage
					exit 1
				fi
				;;
			--find_multipaths)
				if [ -n "$2" ]; then
					FIND=$2
					shift 2
				else
					usage
					exit 1
				fi
				;;
			--property_blacklist)
				if [ -n "$2" ]; then
					PROPERTY=$2
					shift 2
				else
					usage
					exit 1
				fi
				;;
			--option)
				if [ -n "$2" ]; then
					OPTION_NAME=$(echo $2 | cut -s -f1 -d:)
					OPTION_VALUE=$(echo $2 | cut -s -f2 -d:)
					if [ -z "$OPTION_NAME" ]; then
						usage
						exit 1
					fi
					shift 2
				else
					usage
					exit 1
				fi
				;;
			--enable_foreign)
				if [ -n "$2" ]; then
					FOREIGN=$2
					shift 2
				else
					usage
					exit 1
				fi
				;;
			--with_module)
				if [ -n "$2" ]; then
					MODULE=$2
					shift 2
				else
					usage
					exit 1
				fi
				;;
			--with_multipathd)
				if [ -n "$2" ]; then
					MULTIPATHD=$2
					shift 2
				else
					usage
					exit 1
				fi
				;;
			--outfile)
				if [ -n "$2" ]; then
					OUTPUTFILE=$2
					HAVE_OUTFILE=1
					shift 2
				else
					usage
					exit 1
				fi
				;;
			*)
				usage
				exit
		esac
	done
}

function validate_args
{
	if [ "$ENABLE" = "0" ] && [ -n "$FRIENDLY" -o -n "$FIND" -o -n "$PROPERTY" -o -n "$MODULE" -o -n "$FOREIGN" -o -n "$OPTION_NAME" ]; then
		echo "ignoring extra parameters on disable"
		FRIENDLY=""
		FIND=""
		PROPERTY=""
		MODULE=""
		FOREIGN=""
		OPTION_NAME=""
		OPTION_VALUE=""
	fi
	if [ -n "$FRIENDLY" ] && [ "$FRIENDLY" != "y" -a "$FRIENDLY" != "n" ]; then
		echo "--user_friendly_names must be either 'y' or 'n'"
		exit 1
	fi
	if [ "$FIND" = "y" ]; then
		FIND="yes"
	elif [ "$FIND" = "n" ]; then
		FIND="no"
	elif [ -n "$FIND" ] && [ "$FIND" != "yes" -a "$FIND" != "no" -a "$FIND" != "strict" -a "$FIND" != "greedy" -a "$FIND" != "smart" ]; then
		echo "--find_multipaths must be one of 'yes' 'no' 'strict' 'greedy' or 'smart'"
		exit 1
	fi
	if [ -n "$PROPERTY" ] && [ "$PROPERTY" != "y" -a "$PROPERTY" != "n" ]; then
		echo "--property_blacklist must be either 'y' or 'n'"
		exit 1
	fi
	if [ -n "$FOREIGN" ] && [ "$FOREIGN" != "y" -a "$FOREIGN" != "n" ]; then
		echo "--enable_foreign must be either 'y' or 'n'"
		exit 1
	fi
	if [ -n "$OPTION_NAME" ]; then
		if [[ $OPTION_NAME =~ [[:space:]]|#|\"|!|\{|\} ]]; then
			echo "--option name \"$OPTION_NAME\" is invalid"
			exit 1
		elif [[ $OPTION_VALUE =~ \"|#|!|\{|\} ]]; then
			echo "--option value \"$OPTION_VALUE\" is invalid"
			exit 1
		fi
		if [[ $OPTION_VALUE =~ [[:space:]] ]]; then
			OPTION_VALUE=\"$OPTION_VALUE\"
		fi
	fi
	if [ -z "$ENABLE" -a -z "$FIND" -a -z "$FRIENDLY" -a -z "$PROPERTY" -a -z "$FOREIGN" -a -z "$OPTION_NAME" ]; then
		SHOW_STATUS=1
	fi
	if [ -n "$MODULE" ] && [ "$MODULE" != "y" -a "$MODULE" != "n" ]; then
		echo "--with_module must be either 'y' or 'n'"
		exit 1
	fi
	if [ -n "$MULTIPATHD" ] && [ "$MULTIPATHD" != "y" -a "$MULTIPATHD" != "n" ]; then
		echo "--with_multipathd must be either 'y' or 'n'"
		exit 1
	fi
	if [ "$ENABLE" = 2 -a -z "$HAVE_OUTFILE" ]; then
		echo "Because --allow makes changes that cannot be automatically reversed,"
		echo "you must set --outfile when you set --allow"
		exit 1
	fi
}

function add_blacklist_exceptions
{
	INDEX=0
	while [ "$INDEX" -lt "$WWIDS" ] ; do
		sed -i '/^blacklist_exceptions[[:space:]]*{/ a\
	wwid '"\"${WWID_LIST[$INDEX]}\""'
' $TMPFILE
		((INDEX++))
	done
}

umask 0077

parse_args "$@"

validate_args

if [ ! -d "$MULTIPATHDIR" ]; then
	echo "/etc/multipath/ does not exist. failing"
	exit 1
fi

rm $TMPFILE 2> /dev/null
echo "$DEFAULT_CONFIG" > $TMPFILE
if [ -f "$CONFIGFILE" ]; then
	cp $CONFIGFILE $TMPFILE
fi

if grep -q "^blacklist[[:space:]]*{" $TMPFILE ; then
	HAVE_BLACKLIST=1
fi

if grep -q "^blacklist_exceptions[[:space:]]*{" $TMPFILE ; then
	HAVE_EXCEPTIONS=1
fi

if grep -q "^defaults[[:space:]]*{" $TMPFILE ; then
	HAVE_DEFAULTS=1
fi

if [ -z "$MODULE" -o "$MODULE" = "y" ]; then
	if lsmod | grep -q "dm_multipath" ; then
		HAVE_MODULE=1
	else
		HAVE_MODULE=0
	fi
fi

if [ "$MULTIPATHD" = "y" ]; then
	if /bin/systemctl status multipathd.service > /dev/null 2>&1 ; then
		HAVE_MULTIPATHD=1
	else
		HAVE_MULTIPATHD=0
	fi
fi

if [ "$HAVE_BLACKLIST" = "1" ]; then
	if sed -n '/^blacklist[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q "^[[:space:]]*devnode[[:space:]][[:space:]]*\"\.\?\*\"" ; then
		HAVE_DISABLE=1
	elif sed -n '/^blacklist[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q "^[[:space:]]*#[[:space:]]*devnode[[:space:]][[:space:]]*\"\.\?\*\"" ; then
		HAVE_DISABLE=0
	fi
fi

if [ "$HAVE_BLACKLIST" = "1" ]; then
	if sed -n '/^blacklist[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q "^[[:space:]]*wwid[[:space:]][[:space:]]*\"\.\?\*\"" ; then
		HAVE_WWID_DISABLE=1
	elif sed -n '/^blacklist[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q "^[[:space:]]*#[[:space:]]*wwid[[:space:]][[:space:]]*\"\.\?\*\"" ; then
		HAVE_WWID_DISABLE=0
	fi
fi

if [ "$HAVE_DEFAULTS" = "1" ]; then
	HAVE_FIND=`sed -n '/^defaults[[:space:]]*{/,/^}/ p' $TMPFILE | sed -n 's/^[[:blank:]]*find_multipaths[[:blank:]][[:blank:]]*$[^[:blank:]]*$.*$/\1/p' | sed -n 1p`
	if [ "$HAVE_FIND" = "1" ]; then
		HAVE_FIND="yes"
	elif [ "$HAVE_FIND" = "0" ]; then
		HAVE_FIND="no"
	fi
	if sed -n '/^defaults[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q "^[[:space:]]*user_friendly_names[[:space:]][[:space:]]*$yes\|1$" ; then
		HAVE_FRIENDLY=1
	elif sed -n '/^defaults[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q "^[[:space:]]*user_friendly_names[[:space:]][[:space:]]*$no\|0$" ; then
		HAVE_FRIENDLY=0
	fi
	if sed -n '/^defaults[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q "^[[:space:]]*#[[:space:]]*enable_foreign" ; then
		HAVE_FOREIGN=0
	elif sed -n '/^defaults[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q "^[[:space:]]*enable_foreign[[:space:]][[:space:]]*\"\^\$\"" ; then
		HAVE_FOREIGN=1
	elif sed -n '/^defaults[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q "^[[:space:]]*enable_foreign" ; then
		HAVE_FOREIGN=2
	fi
	if [ -n "$OPTION_NAME" ]; then
		if sed -n '/^defaults[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q '^[[:space:]]*'"$OPTION_NAME"'[[:space:]][[:space:]]*'"$OPTION_VALUE" ; then
			HAVE_OPTION=1
		elif sed -n '/^defaults[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q '^[[:space:]]*'"$OPTION_NAME"'$[[:space:]].*$\?$' ; then
			HAVE_OPTION=0
		fi
	fi
fi

if [ "$HAVE_EXCEPTIONS" = "1" ]; then
	if sed -n '/^blacklist_exceptions[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q "^[[:space:]]*property[[:space:]][[:space:]]*\"(SCSI_IDENT_|ID_WWN)\"" ; then
                HAVE_PROPERTY=1
        elif sed -n '/^blacklist_exceptions[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q "^[[:space:]]*#[[:space:]]*property[[:space:]][[:space:]]*\"(SCSI_IDENT_|ID_WWN)\"" ; then
                HAVE_PROPERTY=0
        fi
fi

if [ -n "$SHOW_STATUS" ]; then
	if [ -z "$HAVE_DISABLE" -o "$HAVE_DISABLE" = 0 ]; then
		echo "multipath is enabled"
	else
		echo "multipath is disabled"
	fi
	if [ -z "$HAVE_FIND" ]; then
		echo "find_multipaths is no"
	else
		echo "find_multipaths is $HAVE_FIND"
	fi
	if [ -z "$HAVE_FRIENDLY" -o "$HAVE_FRIENDLY" = 0 ]; then
		echo "user_friendly_names is disabled"
	else
		echo "user_friendly_names is enabled"
	fi
	if [ -z "$HAVE_PROPERTY" -o "$HAVE_PROPERTY" = 0 ]; then
		echo "default property blacklist is disabled"
	else
		echo "default property blacklist is enabled"
	fi
	if [ -z "$HAVE_FOREIGN" -o "$HAVE_FOREIGN" = 0 ]; then
		echo "enable_foreign is not set (all foreign multipath devices will be shown)"
	elif [ "$HAVE_FOREIGN" = 1 ]; then
		echo "enable_foreign is set (no foreign multipath devices will be shown)"
	else
		echo "enable_foreign is set (foreign multipath devices may not be shown)"
	fi
	if [ -n "$HAVE_MODULE" ]; then
		if [ "$HAVE_MODULE" = 1 ]; then
			echo "dm_multipath module is loaded"
		else
			echo "dm_multipath module is not loaded"
		fi
	fi
	if [ -z "$HAVE_MULTIPATHD" ]; then
		if /bin/systemctl status multipathd.service > /dev/null 2>&1 ; then
			HAVE_MULTIPATHD=1
		else
			HAVE_MULTIPATHD=0
		fi
	fi
	if [ "$HAVE_MULTIPATHD" = 1 ]; then
		echo "multipathd is running"
	else
		echo "multipathd is not running"
	fi
	exit 0
fi

if [ -z "$HAVE_BLACKLIST" ]; then
	cat >> $TMPFILE <<- _EOF_

blacklist {
}
_EOF_
fi

if [ -z "$HAVE_DEFAULTS" ]; then
	cat >> $TMPFILE <<- _EOF_

defaults {
}
_EOF_
fi

if [ "$ENABLE" = 2 ]; then
	if [ "$HAVE_DISABLE" = 1 ]; then
		sed -i '/^blacklist[[:space:]]*{/,/^}/ s/^[[:space:]]*devnode[[:space:]][[:space:]]*\"\.\?\*\"/#	devnode ".*"/' $TMPFILE
	fi
	if [ -z "$HAVE_WWID_DISABLE" ]; then
		sed -i '/^blacklist[[:space:]]*{/ a\
	wwid ".*"
' $TMPFILE
	elif [ "$HAVE_WWID_DISABLE" = 0 ]; then
		sed -i '/^blacklist[[:space:]]*{/,/^}/ s/^[[:space:]]*#[[:space:]]*wwid[[:space:]][[:space:]]*\"\.\?\*\"/	wwid ".*"/' $TMPFILE
	fi
	if [ "$HAVE_EXCEPTIONS" = 1 ]; then
		sed -i '/^blacklist_exceptions[[:space:]]*{/,/^}/ {/^[[:space:]]*wwid/ d}' $TMPFILE
	else
		cat >> $TMPFILE <<- _EOF_

blacklist_exceptions {
}
_EOF_
	fi
	add_blacklist_exceptions
elif [ "$ENABLE" = 1 ]; then
	if [ "$HAVE_DISABLE" = 1 ]; then
		sed -i '/^blacklist[[:space:]]*{/,/^}/ s/^[[:space:]]*devnode[[:space:]][[:space:]]*\"\.\?\*\"/#	devnode ".*"/' $TMPFILE
	fi
elif [ "$ENABLE" = 0 ]; then
	if [ -z "$HAVE_DISABLE" ]; then
		sed -i '/^blacklist[[:space:]]*{/ a\
	devnode ".*"
' $TMPFILE
	elif [ "$HAVE_DISABLE" = 0 ]; then
		sed -i '/^blacklist[[:space:]]*{/,/^}/ s/^[[:space:]]*#[[:space:]]*devnode[[:space:]][[:space:]]*\"\.\?\*\"/	devnode ".*"/' $TMPFILE
	fi
fi

if [ -n "$FIND" ]; then
	if [ -z "$HAVE_FIND" ]; then
		sed -i '/^defaults[[:space:]]*{/ a\
	find_multipaths '"$FIND"'
' $TMPFILE
		CHANGED_CONFIG=1
	elif [ "$FIND" != "$HAVE_FIND" ]; then
		sed -i '/^defaults[[:space:]]*{/,/^}/ s/^[[:blank:]]*find_multipaths[[:blank:]][[:blank:]]*[^[:blank:]]*/	find_multipaths '"$FIND"'/' $TMPFILE
		CHANGED_CONFIG=1
	fi
fi

if [ "$FRIENDLY" = "n" ]; then
	if [ "$HAVE_FRIENDLY" = 1 ]; then
		sed -i '/^defaults[[:space:]]*{/,/^}/ s/^[[:space:]]*user_friendly_names[[:space:]][[:space:]]*$yes\|1$/	user_friendly_names no/' $TMPFILE
		CHANGED_CONFIG=1
	fi
elif [ "$FRIENDLY" = "y" ]; then
	if [ -z "$HAVE_FRIENDLY" ]; then
		sed -i '/^defaults[[:space:]]*{/ a\
	user_friendly_names yes
' $TMPFILE
		CHANGED_CONFIG=1
	elif [ "$HAVE_FRIENDLY" = 0 ]; then
		sed -i '/^defaults[[:space:]]*{/,/^}/ s/^[[:space:]]*user_friendly_names[[:space:]][[:space:]]*$no\|0$/	user_friendly_names yes/' $TMPFILE
		CHANGED_CONFIG=1
	fi
fi

if [ "$PROPERTY" = "n" ]; then
	if [ "$HAVE_PROPERTY" = 1 ]; then
		sed -i '/^blacklist_exceptions[[:space:]]*{/,/^}/ s/^[[:space:]]*property[[:space:]][[:space:]]*\"(SCSI_IDENT_|ID_WWN)\"/#	property \"(SCSI_IDENT_|ID_WWN)\"/' $TMPFILE
		CHANGED_CONFIG=1
	fi
elif [ "$PROPERTY" = "y" ]; then
	if [ -z "$HAVE_PROPERTY" ]; then
		sed -i '/^blacklist_exceptions[[:space:]]*{/ a\
	property "(SCSI_IDENT_|ID_WWN)"
' $TMPFILE
		CHANGED_CONFIG=1
	elif [ "$HAVE_PROPERTY" = 0 ]; then
		sed -i '/^blacklist_exceptions[[:space:]]*{/,/^}/ s/^[[:space:]]*#[[:space:]]*property[[:space:]][[:space:]]*\"(SCSI_IDENT_|ID_WWN)\"/	property \"(SCSI_IDENT_|ID_WWN)\"/' $TMPFILE
		CHANGED_CONFIG=1
	fi
fi

if [ "$FOREIGN" = "y" ]; then
	if [ "$HAVE_FOREIGN" = 1 -o "$HAVE_FOREIGN" = 2 ]; then
		sed -i '/^defaults[[:space:]]*{/,/^}/ s/^[[:space:]]*enable_foreign/#	enable_foreign/' $TMPFILE
		CHANGED_CONFIG=1
	fi
elif [ "$FOREIGN" = "n" ]; then
	if [ -z "$HAVE_FOREIGN" ]; then
		sed -i '/^defaults[[:space:]]*{/ a\
	enable_foreign "^$"
' $TMPFILE
		CHANGED_CONFIG=1
	elif [ "$HAVE_FOREIGN" = 0 -o "$HAVE_FOREIGN" = 2 ]; then
		sed -i '/^defaults[[:space:]]*{/,/^}/ s/^[[:space:]]*#\?[[:space:]]*enable_foreign.*$/	enable_foreign "^$"/' $TMPFILE
		CHANGED_CONFIG=1
	fi
fi

if [ -n "$OPTION_NAME" -a -n "$OPTION_VALUE" ]; then
	if [ -z "$HAVE_OPTION" ]; then
		sed -i '/^defaults[[:space:]]*{/ a\
	'"$OPTION_NAME"' '"$OPTION_VALUE"'
' $TMPFILE
		CHANGED_CONFIG=1
	elif [ "$HAVE_OPTION" = 0 ]; then
		sed -i '/^defaults[[:space:]]*{/,/^}/ s/^[[:space:]]*'"$OPTION_NAME"'$[[:space:]].*$\?$/	'"$OPTION_NAME"' '"$OPTION_VALUE"'/' $TMPFILE
		CHANGED_CONFIG=1
	fi
elif [ -n "$OPTION_NAME" -a -n "$HAVE_OPTION" ]; then
	sed -i '/^defaults[[:space:]]*{/,/^}/{/^[[:space:]]*'"$OPTION_NAME"'$[[:space:]].*$\?$/d}' $TMPFILE
	CHANGED_CONFIG=1
fi

if [ -f "$OUTPUTFILE" ]; then
	cp $OUTPUTFILE $OUTPUTFILE.old
	if [ $? != 0 ]; then
		echo "failed to backup old config file, $OUTPUTFILE not updated"
		exit 1
	fi
fi

cp $TMPFILE $OUTPUTFILE
if [ $? != 0 ]; then
	echo "failed to copy new config file into place, check $OUTPUTFILE is still OK"
	exit 1
fi

rm -f $TMPFILE

if [ "$ENABLE" = 1 ]; then
	if [ "$HAVE_MODULE" = 0 ]; then
		modprobe dm_multipath
	fi
	if [ "$HAVE_MULTIPATHD" = 0 ]; then
		systemctl start multipathd.service
	fi
elif [ "$ENABLE" = 0 ]; then
	if [ "$HAVE_MULTIPATHD" = 1 ]; then
		systemctl stop multipathd.service
	fi
elif [ -n "$CHANGED_CONFIG" -a "$HAVE_MULTIPATHD" = 1 ]; then
	systemctl reload multipathd.service
fi