#!/bin/bash # # Copyright (C) 2004-2009 Red Hat, Inc. All rights reserved. # # This file is part of the lvm2 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 # # Edit an lvm.conf file to adjust various properties # DEFAULT_USE_LVMETAD=0 function usage { echo "usage: $0 " echo "" echo "Commands:" echo "Enable clvm: --enable-cluster [--lockinglibdir ] [--lockinglib ]" echo "Disable clvm: --disable-cluster" echo "Set locking library: --lockinglibdir [--lockinglib ]" echo "" echo "Global options:" echo "Config file location: --file " echo "" } function parse_args { while [ -n "$1" ]; do case $1 in --enable-cluster) LOCKING_TYPE=3 USE_LVMETAD=0 shift ;; --disable-cluster) LOCKING_TYPE=1 USE_LVMETAD=$DEFAULT_USE_LVMETAD shift ;; --lockinglibdir) if [ -n "$2" ]; then LOCKINGLIBDIR=$2 shift 2 else usage exit 1 fi ;; --lockinglib) if [ -n "$2" ]; then LOCKINGLIB=$2 shift 2 else usage exit 1 fi ;; --file) if [ -n "$2" ]; then CONFIGFILE=$2 shift 2 else usage exit 1 fi ;; *) usage exit 1 esac done } function validate_args { [ -z "$CONFIGFILE" ] && CONFIGFILE="/etc/lvm/lvm.conf" if [ ! -f "$CONFIGFILE" ] then echo "$CONFIGFILE does not exist" exit 10 fi if [ -z "$LOCKING_TYPE" ] && [ -z "$LOCKINGLIBDIR" ]; then usage exit 1 fi if [ -n "$LOCKINGLIBDIR" ]; then if [ "${LOCKINGLIBDIR:0:1}" != "/" ] then echo "Prefix must be an absolute path name (starting with a /)" exit 12 fi if [ -n "$LOCKINGLIB" ] && [ ! -f "$LOCKINGLIBDIR/$LOCKINGLIB" ] then echo "$LOCKINGLIBDIR/$LOCKINGLIB does not exist, did you do a \"make install\" ?" exit 11 fi fi if [ "$LOCKING_TYPE" = "1" ] && [ -n "$LOCKINGLIBDIR" -o -n "$LOCKINGLIB" ]; then echo "Superfluous locking lib parameter, ignoring" fi } umask 0077 parse_args "$@" validate_args SCRIPTFILE=/etc/lvm/.lvmconf-script.tmp TMPFILE=/etc/lvm/.lvmconf-tmp.tmp # Flags so we know which parts of the file we can replace and which need # adding. These are return codes from grep, so zero means it IS present! have_type=1 have_dir=1 have_library=1 have_use_lvmetad=1 have_global=1 grep -q '^[[:blank:]]*locking_type[[:blank:]]*=' $CONFIGFILE have_type=$? grep -q '^[[:blank:]]*library_dir[[:blank:]]*=' $CONFIGFILE have_dir=$? grep -q '^[[:blank:]]*locking_library[[:blank:]]*=' $CONFIGFILE have_library=$? grep -q '^[[:blank:]]*use_lvmetad[[:blank:]]*=' $CONFIGFILE have_use_lvmetad=$? # Those options are in section "global {" so we must have one if any are present. if [ "$have_type" = "0" -o "$have_dir" = "0" -o "$have_library" = "0" -o "$have_use_lvmetad" = "0" ] then # See if we can find it... grep -q '^[[:blank:]]*global[[:blank:]]*{' $CONFIGFILE have_global=$? if [ "$have_global" = "1" ] then echo "global keys but no 'global {' found, can't edit file" exit 13 fi fi if [ "$LOCKING_TYPE" = "2" ] && [ -z "$LOCKINGLIBDIR" ] && [ "$have_dir" = "1" ]; then echo "no library_dir specified in $CONFIGFILE" exit 16 fi # So if we don't have "global {" we need to create one and # populate it if [ "$have_global" = "1" ] then if [ -z "$LOCKING_TYPE" ]; then LOCKING_TYPE=1 fi if [ "$LOCKING_TYPE" = "3" ] || [ "$LOCKING_TYPE" = "2" ]; then cat $CONFIGFILE - < $TMPFILE global { # Enable locking for cluster LVM locking_type = $LOCKING_TYPE library_dir = "$LOCKINGLIBDIR" # Disable lvmetad in cluster use_lvmetad = 0 EOF if [ $? != 0 ] then echo "failed to create temporary config file, $CONFIGFILE not updated" exit 14 fi if [ -n "$LOCKINGLIB" ]; then cat - <> $TMPFILE locking_library = "$LOCKINGLIB" EOF if [ $? != 0 ] then echo "failed to create temporary config file, $CONFIGFILE not updated" exit 16 fi fi cat - <> $TMPFILE } EOF fi # if we aren't setting cluster locking, we don't need to create a global section if [ $? != 0 ] then echo "failed to create temporary config file, $CONFIGFILE not updated" exit 17 fi else # # We have a "global {" section, so add or replace the # locking entries as appropriate # if [ -n "$LOCKING_TYPE" ]; then if [ "$have_type" = "0" ] then SEDCMD=" s/^[[:blank:]]*locking_type[[:blank:]]*=.*/\ \ \ \ locking_type = $LOCKING_TYPE/g" else SEDCMD=" /global[[:blank:]]*{/a\ \ \ \ locking_type = $LOCKING_TYPE" fi fi if [ -n "$LOCKINGLIBDIR" ]; then if [ "$have_dir" = "0" ] then SEDCMD="${SEDCMD}\ns'^[[:blank:]]*library_dir[[:blank:]]*=.*'\ \ \ \ library_dir = \"$LOCKINGLIBDIR\"'g" else SEDCMD="${SEDCMD}\n/global[[:blank:]]*{/a\ \ \ \ library_dir = \"$LOCKINGLIBDIR\"" fi fi if [ -n "$LOCKINGLIB" ]; then if [ "$have_library" = "0" ] then SEDCMD="${SEDCMD}\ns/^[[:blank:]]*locking_library[[:blank:]]*=.*/\ \ \ \ locking_library = \"$LOCKINGLIB\"/g" else SEDCMD="${SEDCMD}\n/global[[:blank:]]*{/a\ \ \ \ locking_library = \"$LOCKINGLIB\"" fi fi if [ "$have_use_lvmetad" = "0" ] then SEDCMD="${SEDCMD}\ns'^[[:blank:]]*use_lvmetad[[:blank:]]*=.*'\ \ \ \ use_lvmetad = $USE_LVMETAD'g" else SEDCMD="${SEDCMD}\n/global[[:blank:]]*{/a\ \ \ \ use_lvmetad = $USE_LVMETAD" fi echo -e $SEDCMD > $SCRIPTFILE sed <$CONFIGFILE >$TMPFILE -f $SCRIPTFILE if [ $? != 0 ] then echo "sed failed, $CONFIGFILE not updated" exit 15 fi fi # Now we have a suitably editted config file in a temp place, # backup the original and copy our new one into place. cp $CONFIGFILE $CONFIGFILE.lvmconfold if [ $? != 0 ] then echo "failed to backup old config file, $CONFIGFILE not updated" exit 2 fi cp $TMPFILE $CONFIGFILE if [ $? != 0 ] then echo "failed to copy new config file into place, check $CONFIGFILE is still OK" exit 3 fi rm -f $SCRIPTFILE $TMPFILE