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Go Back   Linux Archive > Redhat > Device-mapper Development

 
 
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Old 03-25-2010, 04:52 PM
Benjamin Marzinski
 
Default multipath: don't let init script stop multipathd for root devices

This patch modifies the redhat init script, so that it doesn't allow
multipathd to be stopped when the root device is on it.

Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
---
:100644 100644 ee776f0... e46b1b8... M multipathd/multipathd.init.redhat
multipathd/multipathd.init.redhat | 38 +++++++++++++++++++++++++++++++++++++-
1 file changed, 37 insertions(+), 1 deletion(-)

Index: multipath-tools-100322/multipathd/multipathd.init.redhat
================================================== =================
--- multipath-tools-100322.orig/multipathd/multipathd.init.redhat
+++ multipath-tools-100322/multipathd/multipathd.init.redhat
@@ -2,7 +2,7 @@
#
# multipathd Starts the multipath daemon
#
-# chkconfig: - 13 87
+# chkconfig: - 06 87
# description: Manages device-mapper multipath devices

### BEGIN INIT INFO
@@ -17,6 +17,7 @@ prog=`basename $DAEMON`
initdir=/etc/rc.d/init.d
lockdir=/var/lock/subsys
sysconfig=/etc/sysconfig
+syspath=/sys/block


. $initdir/functions
@@ -25,6 +26,36 @@ test -r $sysconfig/$prog && . $sysconfig

RETVAL=0

+teardown_slaves()
+{
+pushd $1 > /dev/null
+if [ -d "slaves" ]; then
+for slave in slaves/*;
+do
+ if [ "$slave" = "slaves/*" ]; then
+ read dev < $1/dev
+ tablename=`dmsetup table --target multipath | sed -n "s/(.*): .* $dev .*/1/p"`
+ if ! [ -z $tablename ]; then
+ echo "Root is on a multipathed device, multipathd can not be stopped"
+ exit 1
+ fi
+ else
+ local_slave=`readlink -f $slave`;
+ teardown_slaves $local_slave;
+ fi
+ done
+
+else
+ read dev < $1/dev
+ tablename=`dmsetup table --target multipath | sed -n "s/(.*): .* $dev .*/1/p"`
+ if ! [ -z $tablename ]; then
+ echo "Root is on a multipathed device, multipathd can not be stopped"
+ exit 1
+ fi
+fi
+popd > /dev/null
+}
+
#
# See how we were called.
#
@@ -39,6 +70,11 @@ start() {
}

stop() {
+ root_dev=$(awk '{ if ($1 !~ /^[ ]*#/ && $2 == "/") { print $1; }}' /etc/mtab)
+ dm_num=`dmsetup info -c --noheadings -o minor $root_dev`
+ root_dm_device="dm-$dm_num"
+ [ -d $syspath/$root_dm_device ] && teardown_slaves $syspath/$root_dm_device
+
echo -n $"Stopping $prog daemon: "
killproc $DAEMON
RETVAL=$?

--
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