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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} ${raid_set}"
# We need to update grub at the time that a resync completes
# on the root filesystem so that the new member disk will be
# bootable.
root_dir=/
mounted_on_root=0
mounted_on=`mount | grep "^${raid_set}" | awk '{ print $3 }'`
for dir in $mounted_on ; do
if [ "$dir" = "/" -o "$dir" = "/live/image" ]; then
mounted_on_root=1
root_dir=$dir
fi
done
if [ $mounted_on_root -eq 1 ]; then
raid_set_dev=${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 ${raid_set} holds root filesystem. Updating grub."
touch /tmp/raid-grub-install-log
grub-install --no-floppy --recheck --root-directory=${root_dir} ${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
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