#!/bin/sh
#
# 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 MODULE MULTIPATHD CHKCONFIG HAVE_DISABLE HAVE_FIND HAVE_BLACKLIST HAVE_DEFAULTS HAVE_FRIENDLY HAVE_MULTIPATHD HAVE_CHKCONFIG HAVE_MODULE SHOW_STATUS CHANGED_CONFIG
DEFAULT_CONFIGFILE="/usr/share/doc/device-mapper-multipath-0.4.9/multipath.conf"
CONFIGFILE="/etc/multipath.conf"
MULTIPATHDIR="/etc/multipath"
TMPFILE=/etc/multipath/.multipath.conf.tmp
function usage
{
echo "usage: $0 <command>"
echo ""
echo "Commands:"
echo "Enable: --enable "
echo "Disable: --disable"
echo "Set user_friendly_names (Default n): --user_friendly_names <y|n>"
echo "Set find_multipaths (Default n): --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 "chkconfig on/off multipathd (Default y): --with_chkconfig <y|n>"
echo ""
}
function parse_args
{
while [ -n "$1" ]; do
case $1 in
--enable)
ENABLE=1
shift
;;
--disable)
ENABLE=0
shift
;;
--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
;;
--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
;;
--with_chkconfig)
if [ -n "$2" ]; then
CHKCONFIG=$2
shift 2
else
usage
exit 1
fi
;;
*)
usage
exit
esac
done
}
function validate_args
{
if [ "$ENABLE" = "0" ] && [ -n "$FRIENDLY" -o -n "$FIND" -o -n "$MODULE" ]; then
echo "ignoring extra parameters on disable"
FRIENDLY=""
FIND=""
MODULE=""
fi
if [ -n "$FRIENDLY" ] && [ "$FRIENDLY" != "y" -a "$FRIENDLY" != "n" ]; then
echo "--user_friendly_names must be either 'y' or 'n'"
exit 1
fi
if [ -n "$FIND" ] && [ "$FIND" != "y" -a "$FIND" != "n" ]; then
echo "--find_multipaths must be either 'y' or 'n'"
exit 1
fi
if [ -z "$ENABLE" -a -z "$FIND" -a -z "$FRIENDLY" ]; 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 [ -n "$CHKCONFIG" ] && [ "$CHKCONFIG" != "y" -a "$CHKCONFIG" != "n" ]; then
echo "--with_chkconfig must be either 'y' or 'n'"
exit 1
fi
}
umask 0077
parse_args "$@"
validate_args
if [ ! -d "$MULTIPATHDIR" ]; then
echo "/etc/multipath/ does not exist. failing"
exit 1
fi
rm $TMPFILE 2> /dev/null
if [ -f "$CONFIGFILE" ]; then
cp $CONFIGFILE $TMPFILE
elif [ -f "$DEFAULT_CONFIGFILE" ]; then
cp $DEFAULT_CONFIGFILE $TMPFILE
else
touch $TMPFILE
fi
if grep -q "^blacklist[[:space:]]*{" $TMPFILE ; then
HAVE_BLACKLIST=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 service multipathd status > /dev/null ; then
HAVE_MULTIPATHD=1
else
HAVE_MULTIPATHD=0
fi
fi
if [ -z "$CHKCONFIG" -o "$CHKCONFIG" = "y" ]; then
chkconfig --list multipathd > /dev/null 2>&1
if [ $? != 0 ]; then
chkconfig --add multipathd
fi
if chkconfig --list multipathd | grep -q "on" ; then
HAVE_CHKCONFIG=1
else
HAVE_CHKCONFIG=0
fi
fi
if [ "$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_DEFAULTS" = "1" ]; then
if sed -n '/^defaults[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q "^[[:space:]]*find_multipaths[[:space:]]*\(yes\|1\)" ; then
HAVE_FIND=1
elif sed -n '/^defaults[[:space:]]*{/,/^}/ p' $TMPFILE | grep -q "^[[:space:]]*find_multipaths[[:space:]]*\(no\|0\)" ; then
HAVE_FIND=0
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
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" -o "$HAVE_FIND" = 0 ]; then
echo "find_multipaths is disabled"
else
echo "find_multipaths is enabled"
fi
if [ -z "$HAVE_FRIENDLY" -o "$HAVE_FRIENDLY" = 0 ]; then
echo "user_friendly_names is disabled"
else
echo "user_friendly_names is enabled"
fi
if [ -n "$HAVE_MODULE" ]; then
if [ "$HAVE_MODULE" = 1 ]; then
echo "dm_multipath module is loaded"
else
echo "dm_multipath module is not loaded"
fi
fi
if [ -n "$HAVE_MULTIPATHD" ]; then
service multipathd status
fi
if [ -n "$HAVE_CHKCONFIG" ]; then
if [ "$HAVE_CHKCONFIG" = 1 ]; then
echo "multipathd is chkconfiged on"
else
echo "multipathd is chkconfiged off"
fi
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" = 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 ".*"/' $TMPFILE
fi
fi
if [ "$FIND" = "n" ]; then
if [ "$HAVE_FIND" = 1 ]; then
sed -i '/^defaults[[:space:]]*{/,/^}/ s/^[[:space:]]*find_multipaths[[:space:]]*\(yes\|1\)/ find_multipaths no/' $TMPFILE
CHANGED_CONFIG=1
fi
elif [ "$FIND" = "y" ]; then
if [ -z "$HAVE_FIND" ]; then
sed -i '/^defaults[[:space:]]*{/ a\
find_multipaths yes
' $TMPFILE
CHANGED_CONFIG=1
elif [ "$HAVE_FIND" = 0 ]; then
sed -i '/^defaults[[:space:]]*{/,/^}/ s/^[[:space:]]*find_multipaths[[:space:]]*\(no\|0\)/ find_multipaths yes/' $TMPFILE
CHANGED_CONFIG=1
fi
fi
if [ "$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/' $TMPFILE
CHANGED_CONFIG=1
fi
fi
if [ -f "$CONFIGFILE" ]; then
cp $CONFIGFILE $CONFIGFILE.old
if [ $? != 0 ]; then
echo "failed to backup old config file, $CONFIGFILE not updated"
exit 1
fi
fi
cp $TMPFILE $CONFIGFILE
if [ $? != 0 ]; then
echo "failed to copy new config file into place, check $CONFIGFILE 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
service multipathd start
fi
if [ "$HAVE_CHKCONFIG" = 0 ]; then
chkconfig multipathd on
fi
elif [ "$ENABLE" = 0 ]; then
if [ "$HAVE_MULTIPATHD" = 1 ]; then
service multipathd stop
fi
if [ "$HAVE_CHKCONFIG" = 1 ]; then
chkconfig multipathd off
fi
elif [ -n "$CHANGED_CONFIG" -a "$HAVE_MULTIPATHD" = 1 ]; then
service multipathd reload
fi
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