From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001

From: Benjamin Marzinski <bmarzins@redhat.com>

Date: Thu, 16 Oct 2014 15:49:01 -0500

Subject: [PATCH] RH: add mpathconf

mpathconf is a program (largely based on lvmcomf) to help users

configure /etc/multipath.conf and enable or disable multipathing.  It

has a couple of built-in options that can be set directly from the

command line.  But, mostly it is used to get a multipath.conf file

with the OS defaults, and to enable and disable multipathing via

a single command.

Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>

---

 libmultipath/config.c |   2 +

 multipath/Makefile    |   5 +

 multipath/mpathconf   | 556 ++++++++++++++++++++++++++++++++++++++++++

 multipath/mpathconf.8 | 135 ++++++++++

 4 files changed, 698 insertions(+)

 create mode 100644 multipath/mpathconf

 create mode 100644 multipath/mpathconf.8

diff --git a/libmultipath/config.c b/libmultipath/config.c

index 5f35c3d3..cee3bbb7 100644

--- a/libmultipath/config.c

+++ b/libmultipath/config.c

@@ -897,6 +897,8 @@ int _init_config (const char *file, struct config *conf)

 		factorize_hwtable(conf->hwtable, builtin_hwtable_size, file);

 	} else {

 		condlog(0, "/etc/multipath.conf does not exist, blacklisting all devices.");

+		condlog(0, "You can run \"/sbin/mpathconf --enable\" to create");

+		condlog(0, "/etc/multipath.conf. See man mpathconf(8) for more details");

 		if (conf->blist_devnode == NULL) {

 			conf->blist_devnode = vector_alloc();

 			if (!conf->blist_devnode) {

diff --git a/multipath/Makefile b/multipath/Makefile

index b9bbb3cf..e720c7f6 100644

--- a/multipath/Makefile

+++ b/multipath/Makefile

@@ -18,10 +18,12 @@ $(EXEC): $(OBJS) $(multipathdir)/libmultipath.so $(mpathcmddir)/libmpathcmd.so

 	$(CC) $(CFLAGS) $(OBJS) -o $(EXEC) $(LDFLAGS) $(LIBDEPS)

 	$(GZIP) $(EXEC).8 > $(EXEC).8.gz

 	$(GZIP) $(EXEC).conf.5 > $(EXEC).conf.5.gz

+	$(GZIP) mpathconf.8 > mpathconf.8.gz

 install:

 	$(INSTALL_PROGRAM) -d $(DESTDIR)$(bindir)

 	$(INSTALL_PROGRAM) -m 755 $(EXEC) $(DESTDIR)$(bindir)/

+	$(INSTALL_PROGRAM) -m 755 mpathconf $(DESTDIR)$(bindir)/

 	$(INSTALL_PROGRAM) -d $(DESTDIR)$(udevrulesdir)

 	$(INSTALL_PROGRAM) -m 644 11-dm-mpath.rules $(DESTDIR)$(udevrulesdir)

 	$(INSTALL_PROGRAM) -m 644 $(EXEC).rules $(DESTDIR)$(libudevdir)/rules.d/62-multipath.rules

@@ -29,13 +31,16 @@ install:

 	$(INSTALL_PROGRAM) -m 644 $(EXEC).8.gz $(DESTDIR)$(man8dir)

 	$(INSTALL_PROGRAM) -d $(DESTDIR)$(man5dir)

 	$(INSTALL_PROGRAM) -m 644 $(EXEC).conf.5.gz $(DESTDIR)$(man5dir)

+	$(INSTALL_PROGRAM) -m 644 mpathconf.8.gz $(DESTDIR)$(man8dir)

 uninstall:

 	$(RM) $(DESTDIR)$(bindir)/$(EXEC)

 	$(RM) $(DESTDIR)$(udevrulesdir)/11-dm-mpath.rules

 	$(RM) $(DESTDIR)$(libudevdir)/rules.d/62-multipath.rules

+	$(RM) $(DESTDIR)$(bindir)/mpathconf

 	$(RM) $(DESTDIR)$(man8dir)/$(EXEC).8.gz

 	$(RM) $(DESTDIR)$(man5dir)/$(EXEC).conf.5.gz

+	$(RM) $(DESTDIR)$(man8dir)/mpathconf.8.gz

 clean: dep_clean

 	$(RM) core *.o $(EXEC) *.gz

diff --git a/multipath/mpathconf b/multipath/mpathconf

new file mode 100644

index 00000000..c00d2555

--- /dev/null

+++ b/multipath/mpathconf

@@ -0,0 +1,556 @@

+#!/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

+

+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

+}"

+

+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 n): --property_blacklist <y|n>"

+	echo "Set enable_foreign to show foreign devices (Default n): --enable_foreign <y|n>"

+	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

+				;;

+			--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" ]; then

+		echo "ignoring extra parameters on disable"

+		FRIENDLY=""

+		FIND=""

+		PROPERTY=""

+		MODULE=""

+	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 [ -z "$ENABLE" -a -z "$FIND" -a -z "$FRIENDLY" -a -z "$PROPERTY" -a -z "$FOREIGN" ]; 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[[:space:]][[:space:]]*\"\^\$\"" ; then

+		HAVE_FOREIGN=2

+	elif sed -n '/^defaults[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q "^[[:space:]]*enable_foreign[[:space:]][[:space:]]*\"NONE\"" ; then

+		HAVE_FOREIGN=2

+	elif sed -n '/^defaults[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q "^[[:space:]]*enable_foreign" ; then

+		HAVE_FOREIGN=3

+	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 (no foreign multipath devices will be shown)"

+	elif [ "$HAVE_FOREIGN" = 1 ]; then

+		echo "enable_foreign is set (all foreign multipath devices will be shown)"

+	elif [ "$HAVE_FOREIGN" = 2 ]; 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" = "n" ]; then

+	if [ "$HAVE_FOREIGN" = 1 -o "$HAVE_FOREIGN" = 3 ]; then

+		sed -i '/^defaults[[:space:]]*{/,/^}/ s/^[[:space:]]*enable_foreign/#	enable_foreign/' $TMPFILE

+		CHANGED_CONFIG=1

+	fi

+elif [ "$FOREIGN" = "y" ]; 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 -o "$HAVE_FOREIGN" = 3 ]; then

+		sed -i '/^defaults[[:space:]]*{/,/^}/ s/^[[:space:]]*#\?[[:space:]]*enable_foreign.*$/	enable_foreign ".*"/' $TMPFILE

+		CHANGED_CONFIG=1

+	fi

+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

diff --git a/multipath/mpathconf.8 b/multipath/mpathconf.8

new file mode 100644

index 00000000..a14d831e

--- /dev/null

+++ b/multipath/mpathconf.8

@@ -0,0 +1,135 @@

+.TH MPATHCONF 8 "June 2010" "" "Linux Administrator's Manual"

+.SH NAME

+mpathconf - A tool for configuring device-mapper-multipath

+.SH SYNOPSIS

+.B mpathconf

+.RB [\| commands \|]

+.RB [\| options \|]

+.SH DESCRIPTION

+.B mpathconf

+is a utility that creates or modifies

+.B /etc/multipath.conf.

+It can enable or disable multipathing and configure some common options.

+.B mpathconf

+can also load the

+.B dm_multipath

+module, start and stop the

+.B multipathd

+daemon, and configure the

+.B multipathd

+service to start automatically or not. If

+.B mpathconf

+is called with no commands, it will display the current configuration, but

+will not create of modify

+.B /etc/multipath.conf

+

+The default options for mpathconf are

+.B --with_module

+The

+.B --with_multipathd

+option is not set by default.  Enabling multipathing will load the

+.B dm_multipath

+module but it will not immediately start it. This is so

+that users can manually edit their config file if necessary, before starting

+.B multipathd.

+

+If

+.B /etc/multipath.conf

+already exists, mpathconf will edit it. If it does not exist, mpathconf will

+create a default file with

+.B user_friendly_names

+set and

+.B find_multipaths

+set to \fByes\fP. To disable these, use the

+.B --user_friendly_names n

+and

+.B --find_multipaths n

+options

+.SH COMMANDS

+.TP

+.B --enable

+Removes any line that blacklists all device nodes from the

+.B /etc/multipath.conf

+blacklist section. Also, creates

+.B /etc/multipath.conf

+if it doesn't exist.

+.TP

+.B --disable

+Adds a line that blacklists all device nodes to the

+.B /etc/multipath.conf

+blacklist section. If no blacklist section exists, it will create one.

+.TP

+.B --allow \fB<device>\fP

+Modifies the \fB/etc/multipath/conf\fP blacklist to blacklist all

+wwids and the blacklist_exceptions to whitelist \fB<device>\fP. \fB<device>\fP

+can be in the form of MAJOR:MINOR, a wwid, or the name of a device-mapper

+device, either a multipath device, or any device on stacked on top of one or

+more multipath devices. This command can be used multiple times to allow

+multiple devices.  \fBNOTE:\fP This action will create a configuration file that

+mpathconf will not be able to revert back to its previous state. Because

+of this, \fB--outfile\fP is required when using \fB--allow\fP.

+.TP

+.B --user_friendly_names \fP { \fBy\fP | \fBn\fP }

+If set to \fBy\fP, this adds the line

+.B user_friendly_names yes

+to the

+.B /etc/multipath.conf

+defaults section. If set to \fBn\fP, this removes the line, if present. This

+command can be used along with any other command.

+.TP

+.B --find_multipaths\fP { \fByes\fP | \fBno\fP | \fBstrict\fP | \fBgreedy\fP | \fBsmart\fP }

+If set to \fB<value>\fP, this adds the line

+.B find_multipaths <value>