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+#!/bin/bash
+#
+# **** License ****
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# This code was originally developed by Vyatta, Inc.
+# Portions created by Vyatta are Copyright (C) 2006, 2007 Vyatta, Inc.
+# All Rights Reserved.
+#
+# Author: Bob Gilligan <gilligan@vyatta.com>
+# Date: 2008
+# Description: A script to handle events from the Linux Software RAID
+# subsystem.
+#
+# **** End License ****
+#
+# This script is called by the "mdadm" daemon running in "monitor" mode
+# whenever an event occurs in in the RAID subsytem. The script is called
+# with two or three arguments: The first argument is always the name of
+# the event, e.g. "RebuildFinished". The second argument is the name of
+# the RAID set device that the event pertains to, e.g. "/dev/md0". The
+# third argument is provided for some events, and gives the name of the
+# RAID set member that the event pertains to, e.g. "/dev/sda2".
+#
+# See the mdadm(8) man page for more details on the events that it provides.
+#
+
+# Script will be called with 2 or 3 arguments, depending on the event
+if [ $# -lt 2 ]; then
+ logger -t "RAID" -p local0.warning "vyatta-raid-event: Error: Not enough args: $*"
+ # We can't do anything if we don't know event and RAID device it
+ # pertains to.
+ exit 1
+fi
+if [ $# -gt 3 ]; then
+ logger -t "RAID" -p local0.warning "vyatta-raid-event: Warning: too many args: $*"
+ # Be Robust: Try to complete task with args we know about
+fi
+
+event=$1
+raid_set=$2
+
+case $event in
+
+ RebuildFinished)
+ logger -t "RAID" -p local0.warning "event ${event} ${raid_set}"
+
+ # We need to update grub at the time that a resync completes
+ # on the root filesystem so that the new member disk will be
+ # bootable.
+ mounted_on=`mount | grep "^${raid_set}" | awk '{ print $3 }'`
+ if [ "$mounted_on" = "/" ]; then
+ raid_set_dev=${raid_set##*/}
+ if [ -e /sys/block/${raid_set_dev}/md/degraded ]; then
+ degraded=`cat /sys/block/${raid_set_dev}/md/degraded`
+ else
+ degraded=0
+ fi
+ if [ $degraded -eq 0 ]; then
+ drive=${member_to_add%%[0-9]*}
+ logger -t "RAID" -p local0.warning \
+ "RAID set ${raid_set} holds root filesystem. Updating grub."
+ touch /tmp/raid-grub-install-log
+ grub-install --no-floppy --recheck --root-directory=/ ${raid_set} \
+ >> /tmp/raid-grub-install-log 2>&1
+ if [ $? -ne 0 ]; then
+ logger -t "RAID" -p local0.warning \
+ "grub-installed failed for $raid_set"
+ fi
+ else
+ logger -t "RAID" -p local0.warning \
+ "RAID set ${raid_set} is still degraded. No action taken."
+ fi
+ else
+ logger -t "RAID" -p local0.warning \
+ "RAID set ${raid_set} does not hold root filesystem. No action taken"
+ fi
+ ;;
+
+ DeviceDisappeared | RebuildStarted | Rebuild?? | NewArray | \
+ DegradedArray | MoveSpare | SparesMissing | TestMessage)
+ logger -t "RAID" -p local0.warning \
+ "event ${event} ${raid_set}: No action taken"
+ ;;
+
+ Fail | FailSpare | SpareActive)
+ member=$3
+ logger -t "RAID" -p local0.warning \
+ "event ${event} ${raid_set} ${member}: No action taken"
+ ;;
+
+ *)
+ logger -t "RAID" -p local0.warning \
+ "event ${event} unknown. No action taken"
+ ;;
+
+ esac