device-mapper-multipath/0128-RHBZ-1222123-mpathconf-allow.patch

---
 multipath/mpathconf |  135 +++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 124 insertions(+), 11 deletions(-)

Index: multipath-tools-130222/multipath/mpathconf
===================================================================
--- multipath-tools-130222.orig/multipath/mpathconf
+++ multipath-tools-130222/multipath/mpathconf
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 # Copyright (C) 2010 Red Hat, Inc. All rights reserved.
 #
@@ -17,7 +17,7 @@
 # This program was largely ripped off from lvmconf
 #
 
-unset ENABLE FIND FRIENDLY MODULE MULTIPATHD HAVE_DISABLE HAVE_FIND HAVE_BLACKLIST HAVE_DEFAULTS HAVE_FRIENDLY HAVE_MULTIPATHD HAVE_MODULE SHOW_STATUS CHANGED_CONFIG
+unset ENABLE FIND FRIENDLY MODULE MULTIPATHD HAVE_DISABLE HAVE_WWID_DISABLE HAVE_FIND HAVE_BLACKLIST HAVE_EXCEPTIONS HAVE_DEFAULTS HAVE_FRIENDLY HAVE_MULTIPATHD HAVE_MODULE HAVE_OUTFILE SHOW_STATUS CHANGED_CONFIG WWID_LIST
 
 DEFAULT_CONFIG="# device-mapper-multipath configuration file
 
@@ -38,8 +38,10 @@ defaults {
 }"
 
 CONFIGFILE="/etc/multipath.conf"
+OUTPUTFILE="/etc/multipath.conf"
 MULTIPATHDIR="/etc/multipath"
 TMPFILE="/etc/multipath/.multipath.conf.tmp"
+WWIDS=0
 
 function usage
 {
@@ -48,13 +50,60 @@ function usage
 	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 <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 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 [[ "$1" =~ ^part[[:digit:]]+-mpath- ]] ; then
+		WWID_LIST[$WWIDS]="${1##part*-mpath-}"
+		((WWIDS++))
+	elif [[ "$1" =~ ^mpath- ]] ; then
+		WWID_LIST[$WWIDS]="${1##mpath-}"
+		((WWIDS++))
+	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 $UUID
+	else
+		WWID_LIST[$WWIDS]="$1"
+		((WWIDS++))
+	fi
+}
+
 function parse_args
 {
 	while [ -n "$1" ]; do
@@ -67,6 +116,16 @@ function parse_args
 				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
@@ -103,6 +162,16 @@ function parse_args
 					exit 1
 				fi
 				;;
+			--outfile)
+				if [ -n "$2" ]; then
+					OUTPUTFILE=$2
+					HAVE_OUTFILE=1
+					shift 2
+				else
+					usage
+					exit 1
+				fi
+				;;
 			*)
 				usage
 				exit
@@ -137,6 +206,22 @@ function validate_args
 		echo "--with_multipathd must be either 'y' or 'n'"
 		exit 1
 	fi
+	if [ "$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
+{
+	echo "blacklist_exceptions {" >> $TMPFILE
+	INDEX=0
+	while [ "$INDEX" -lt "$WWIDS" ] ; do
+		echo "	wwid \"${WWID_LIST[$INDEX]}\"" >> $TMPFILE
+		((INDEX++))
+	done
+	echo "}" >> $TMPFILE
 }
 
 umask 0077
@@ -160,6 +245,10 @@ if grep -q "^blacklist[[:space:]]*{" $TM
 	HAVE_BLACKLIST=1
 fi
 
+if grep -q "^blacklist_exceptions[[:space:]]*{" $TMPFILE ; then
+	HAVE_EXCEPTIONS=1
+fi
+
 if grep -q "^defaults[[:space:]]*{" $TMPFILE ; then
 	HAVE_DEFAULTS=1
 fi
@@ -183,11 +272,19 @@ fi
 if [ "$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
+	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
 	if sed -n '/^defaults[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q "^[[:space:]]*find_multipaths[[:space:]]*\(yes\|1\)" ; then
 		HAVE_FIND=1
@@ -255,17 +352,33 @@ defaults {
 _EOF_
 fi
 
-if [ "$ENABLE" = 1 ]; then
+if [ "$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:]]*{/,/^}/d' $TMPFILE
+	fi
+	echo $HAVE_WWID_DISABLE
+	add_blacklist_exceptions
+elif [ "$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 "*"
+	devnode ".*"
 ' $TMPFILE
 	elif [ "$HAVE_DISABLE" = 0 ]; then
-		sed -i '/^blacklist[[:space:]]*{/,/^}/ s/^[[:space:]]*#[#[:space:]]*devnode \"\.\?\*\"/	devnode ".*"/' $TMPFILE
+		sed -i '/^blacklist[[:space:]]*{/,/^}/ s/^[[:space:]]*#[[:space:]]*devnode \"\.\?\*\"/	devnode ".*"/' $TMPFILE
 	fi
 fi
 
@@ -303,17 +416,17 @@ elif [ "$FRIENDLY" = "y" ]; then
 	fi
 fi
 
-if [ -f "$CONFIGFILE" ]; then
-	cp $CONFIGFILE $CONFIGFILE.old
+if [ -f "$OUTPUTFILE" ]; then
+	cp $OUTPUTFILE $OUTPUTFILE.old
 	if [ $? != 0 ]; then
-		echo "failed to backup old config file, $CONFIGFILE not updated"
+		echo "failed to backup old config file, $OUTPUTFILE not updated"
 		exit 1
 	fi
 fi
 
-cp $TMPFILE $CONFIGFILE
+cp $TMPFILE $OUTPUTFILE
 if [ $? != 0 ]; then
-	echo "failed to copy new config file into place, check $CONFIGFILE is still OK"
+	echo "failed to copy new config file into place, check $OUTPUTFILE is still OK"
 	exit 1
 fi