#!/bin/bash
#
# Copyright (c) 2011 Bryan Schumaker <bjschuma@netapp.com>
#
# Script for easier NFSD fault injection

# Check that debugfs has been mounted
setglobal DEBUGFS = $[cat /proc/mounts | grep debugfs]
if test $DEBUGFS == "" {
	echo "debugfs does not appear to be mounted!"
	echo "Please mount debugfs and try again"
	exit 1
}

# Check that the fault injection directory exists
setglobal DEBUGDIR = "$[echo $DEBUGFS | awk '{print $2}]/nfsd"
if test ! -d $DEBUGDIR {
	echo "$DEBUGDIR does not exist"
	echo "Check that your .config selects CONFIG_NFSD_FAULT_INJECTION"
	exit 1
}

proc help
{
	echo "Usage $0 injection_type [count]"
	echo ""
	echo "Injection types are:"
	ls $DEBUGDIR
	exit 1
}

if test $Argc == 0 {
	help
} elif test ! -f $DEBUGDIR/$1 {
	help
} elif test $Argc != 2 {
	setglobal COUNT = '0'
} else {
	setglobal COUNT = $2
}

setglobal BEFORE = $[mktemp]
setglobal 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