NFSD: Added fault injection script

#!/bin/bash

#

# Copyright (c) 2011 Bryan Schumaker <bjschuma@netapp.com>

#

# Script for easier NFSD fault injection

# Check that debugfs has been mounted

DEBUGFS=`cat /proc/mounts | grep debugfs`

if [ "$DEBUGFS" == "" ]; then

	echo "debugfs does not appear to be mounted!"

	echo "Please mount debugfs and try again"

	exit 1

fi

# Check that the fault injection directory exists

DEBUGDIR=`echo $DEBUGFS | awk '{print $2}'`/nfsd

if [ ! -d "$DEBUGDIR" ]; then

	echo "$DEBUGDIR does not exist"

	echo "Check that your .config selects CONFIG_NFSD_FAULT_INJECTION"

	exit 1

fi

function help()

{

	echo "Usage $0 injection_type [count]"

	echo ""

	echo "Injection types are:"

	ls $DEBUGDIR

	exit 1

}

if [ $# == 0 ]; then

	help

elif [ ! -f $DEBUGDIR/$1 ]; then

	help

elif [ $# != 2 ]; then

	COUNT=0

else

	COUNT=$2

fi

BEFORE=`mktemp`

AFTER=`mktemp`

dmesg > $BEFORE

echo $COUNT > $DEBUGDIR/$1

dmesg > $AFTER

# Capture lines that only exist in the $AFTER file

diff $BEFORE $AFTER | grep ">"

rm -f $BEFORE $AFTER