[LTP] [PATCH v2 02/05] Add Script which would actually do the job of injecting faults

[Subrata Modak <subrata@linux.vnet.ibm.com>]

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Script which would actually do the job of injecting faults by changing various
parametrs available under /debug/fail*. This would be done dynamically during
LTP run, and, is capable of taking parameters from 0 to 100 to vary the
probability of Fault the user wants to inject in the running kernel.

Incorporated Mike�� & Garrets comments and concerns.

Signed-off-by: Subrata Modak<subrata@linux.vnet.ibm.com>
---

--- ltp-full-20090731.orig/tools/insert_kernel_faults.sh	1970-01-01 05:30:00.000000000 +0530
+++ ltp-full-20090731/tools/insert_kernel_faults.sh	2009-08-17 12:17:31.000000000 +0530
@@ -0,0 +1,53 @@
+#!/bin/sh
+################################################################################
+##                                                                            ##
+## Copyright (c) International Business Machines  Corp., 2009                 ##
+##                                                                            ##
+## This program is free software;  you can redistribute it and/or modify      ##
+## it under the terms of the GNU General Public License as published by       ##
+## the Free Software Foundation; either version 2 of the License, or          ##
+## (at your option) any later version.                                        ##
+##                                                                            ##
+## 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.                                                          ##
+##                                                                            ##
+## You should have received a copy of the GNU General Public License          ##
+## along with this program;  if not, write to the Free Software               ##
+## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA    ##
+##                                                                            ##
+################################################################################
+#									      ##
+# File :        insert_kernel_faults.sh					      ##
+#									      ##
+# Usage:	insert_kernel_faults.sh <fault_percentage>		      ##
+#									      ##
+# Description:  This is a simple script that inserts faults at various	      ##
+#		subsystems of the kernel. Please refer to the ltp/README      ##
+#		for the various kernel CONFIG options needed to exploit	      ##
+#		all those features					      ##
+#									      ##
+# Author:	Subrata Modak <subrata@linux.vnet.ibm.com>		      ##
+#									      ##
+# History:      Aug 11 2009 - Created - Subrata Modak.			      ##
+#		Aug 17 2009 - Changed the debugfs mount point - Subrata Modak.##
+################################################################################
+
+if [ -z $1 ]
+	then
+	#Check if Useage has been proper
+	echo "Usage: $0 <fault_percentage>"
+	exit 1
+fi
+
+#These are the types of Subsystems where fault will be injected
+#Make sure debugfs has been mounted
+for FAILTYPE in fail_io_timeout fail_make_request fail_page_alloc failslab
+do
+	echo $1 > /sys/kernel/debug/$FAILTYPE/probability
+	echo 100 > /sys/kernel/debug/$FAILTYPE/interval
+	echo -1 > /sys/kernel/debug/$FAILTYPE/times
+	echo 0 > /sys/kernel/debug/$FAILTYPE/space
+done
+

---
Regards--
Subrata



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