device-mapper-multipath/0129-RH-add-mpathconf.patch

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   | 555 ++++++++++++++++++++++++++++++++++++++++++
 multipath/mpathconf.8 | 135 ++++++++++
 4 files changed, 697 insertions(+)
 create mode 100644 multipath/mpathconf
 create mode 100644 multipath/mpathconf.8

diff --git a/libmultipath/config.c b/libmultipath/config.c
index 8d291491..bbdd1617 100644
--- a/libmultipath/config.c
+++ b/libmultipath/config.c
@@ -895,6 +895,8 @@ 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 $(EXEC) *.gz
diff --git a/multipath/mpathconf b/multipath/mpathconf
new file mode 100644
index 00000000..2f4f3eaf
--- /dev/null
+++ b/multipath/mpathconf
@@ -0,0 +1,555 @@
+#!/bin/bash
+#
+# Copyright (C) 2010 Red Hat, Inc. All rights reserved.
+#
+# This file is part of the device-mapper-multipath package.
+#
+# This copyrighted material is made available to anyone wishing to use,
+# modify, copy, or redistribute it subject to the terms and conditions
+# of the GNU General Public License v.2.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+#
+# Simple editting of /etc/multipath.conf
+# This program was largely ripped off from lvmconf
+#
+
+unset ENABLE FIND FRIENDLY PROPERTY FOREIGN MODULE MULTIPATHD HAVE_DISABLE HAVE_WWID_DISABLE HAVE_FIND HAVE_BLACKLIST HAVE_EXCEPTIONS HAVE_DEFAULTS HAVE_FRIENDLY HAVE_PROPERTY HAVE_FOREIGN HAVE_MULTIPATHD HAVE_MODULE HAVE_OUTFILE SHOW_STATUS CHANGED_CONFIG WWID_LIST
+
+DEFAULT_CONFIG="# device-mapper-multipath configuration file
+
+# For a complete list of the default configuration values, run either:
+# # multipath -t
+# or
+# # multipathd show config
+
+# For a list of configuration options with descriptions, see the
+# multipath.conf man page.
+
+defaults {
+	user_friendly_names yes
+	find_multipaths yes
+	enable_foreign \"^$\"
+}
+
+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: $0 <command>"
+	echo ""
+	echo "Commands:"
+	echo "Enable: --enable "
+	echo "Disable: --disable"
+	echo "Only allow certain wwids (instead of enable): --allow <WWID>"
+	echo "Set user_friendly_names (Default y): --user_friendly_names <y|n>"
+	echo "Set find_multipaths (Default y): --find_multipaths <yes|no|strict|greedy|smart>"
+	echo "Set default property blacklist (Default y): --property_blacklist <y|n>"
+	echo "Set enable_foreign to show foreign devices (Default n): --enable_foreign <y|n>"
+	echo "Load the dm-multipath modules on enable (Default y): --with_module <y|n>"
+	echo "start/stop/reload multipathd (Default n): --with_multipathd <y|n>"
+	echo "select output file (Default /etc/multipath.conf): --outfile <FILE>"
+	echo ""
+}
+
+function add_wwid
+{
+	INDEX=0
+	while [ "$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 "$PROPERTY" ]; then
+		SHOW_STATUS=1
+	fi
+	if [ -n "$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 \"\.\?\*\"" ; then
+		HAVE_DISABLE=1
+	elif sed -n '/^blacklist[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q "^[[:space:]]*#[[:space:]]*devnode \"\.\?\*\"" ; then
+		HAVE_DISABLE=0
+	fi
+fi
+
+if [ "$HAVE_BLACKLIST" = "1" ]; then
+	if sed -n '/^blacklist[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q "^[[:space:]]*wwid \"\.\?\*\"" ; then
+		HAVE_WWID_DISABLE=1
+	elif sed -n '/^blacklist[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q "^[[:space:]]*#[[:space:]]*wwid \"\.\?\*\"" ; then
+		HAVE_WWID_DISABLE=0
+	fi
+fi
+
+if [ "$HAVE_DEFAULTS" = "1" ]; then
+	HAVE_FIND=`sed -n '/^defaults[[:space:]]*{/,/^}/ p' $TMPFILE | sed -n 's/^[[:blank:]]*find_multipaths[[:blank:]]*\([^[:blank:]]*\).*$/\1/p' | sed -n 1p`
+	if [ "$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:]]*\(yes\|1\)" ; then
+		HAVE_FRIENDLY=1
+	elif sed -n '/^defaults[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q "^[[:space:]]*user_friendly_names[[: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:]]*\"\^\$\"" ; then
+		HAVE_FOREIGN=1
+	elif sed -n '/^defaults[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q "^[[:space:]]*enable_foreign" ; then
+		HAVE_FOREIGN=2
+	fi
+fi
+
+if [ "$HAVE_EXCEPTIONS" = "1" ]; then
+	if sed -n '/^blacklist_exceptions[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q "^[[:space:]]*property[[:space:]]*\"(SCSI_IDENT_|ID_WWN)\"" ; then
+                HAVE_PROPERTY=1
+        elif sed -n '/^blacklist_exceptions[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q "^[[:space:]]*#[[:space:]]*property[[:space:]]*\"(SCSI_IDENT_|ID_WWN)\"" ; then
+                HAVE_PROPERTY=0
+        fi
+fi
+
+if [ -n "$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 \"\.\?\*\"/#	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 \"\.\?\*\"/	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 \"\.\?\*\"/#	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 \"\.\?\*\"/	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" != "$HAVE_FIND" ]; then
+		sed -i '/^defaults[[:space:]]*{/,/^}/ s/^[[:blank:]]*find_multipaths[[:blank:]]*[^[:blank:]]*/	find_multipaths '"$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:]]*\(yes\|1\)/	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:]]*\(no\|0\)/	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:]]*\"(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:]]*\"(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 "^$"/' $TMPFILE
+		CHANGED_CONFIG=1
+	fi
+fi
+
+if [ -f "$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..83515eb4
--- /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>
+to the
+.B /etc/multipath.conf
+defaults section. This command can be used along with any other command.
+\fBy\fP and \fBn\fP can be used instead of \fByes\fP and \fBno\fP.
+.TP
+.B --property_blacklist \fP { \fBy\fP | \fBn\fP }
+If set to \fBy\fP, this adds the line
+.B property "(SCSI_IDENT_|ID_WWN)"
+to the
+.B /etc/multipath.conf
+blacklist_exceptions section. If set to \fBn\fP, this removes the line, if
+present. This command can be used along with any other command.
+.TP
+.B --enable_foreign\fP { \fBy\fP | \fBn\fP }
+If set to \fBn\fP, this adds the line
+.B enable_foreign "^$"
+to the
+.B /etc/multipath.conf
+defaults section. if set to \fBy\fP, this removes the line, if present. This
+command can be used along with any other command.
+.TP
+.B --outfile \fB<filename>\fP
+Write the resulting multipath configuration to \fB<filename>\fP instead of
+\fB/etc/multipath.conf\fP.
+.SH OPTIONS
+.TP
+.B --with_module\fP { \fBy\fP | \fBn\fP }
+If set to \fBy\fP, this runs
+.B modprobe dm_multipath
+to install the multipath modules. This option only works with the
+.B --enable
+command. This option is set to \fBy\fP by default.
+.TP
+.B --with_multipathd { \fBy\fP | \fBn\fP }
+If set to \fBy\fP, this runs
+.B service multipathd start
+to start the multipathd daemon on \fB--enable\fP,
+.B service multipathd stop
+to stop the multipathd daemon on \fB--disable\fP, and
+.B service multipathd reload
+to reconfigure multipathd on \fB--user_frindly_names\fP and
+\fB--find_multipaths\fP.
+This option is set to \fBn\fP by default.
+.SH FILES
+.BR /etc/multipath.conf
+.SH "SEE ALSO"
+.BR multipath.conf (5),
+.BR modprobe (8),
+.BR multipath (8),
+.BR multipathd (8),
+.BR service (8),
+.SH AUTHOR
+Benjamin Marzinski <bmarzins@redhat.com>
-- 
2.17.2