1#!/bin/sh 2################################################################################ 3## ## 4## Copyright (c) International Business Machines Corp., 2009 ## 5## ## 6## This program is free software; you can redistribute it and/or modify ## 7## it under the terms of the GNU General Public License as published by ## 8## the Free Software Foundation; either version 2 of the License, or ## 9## (at your option) any later version. ## 10## ## 11## This program is distributed in the hope that it will be useful, but ## 12## WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY ## 13## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License ## 14## for more details. ## 15## ## 16## You should have received a copy of the GNU General Public License ## 17## along with this program; if not, write to the Free Software ## 18## Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA ## 19## ## 20################################################################################ 21# ## 22# File : insert_kernel_faults.sh ## 23# ## 24# Usage: insert_kernel_faults.sh <fault_percentage> ## 25# ## 26# Description: This is a simple script that inserts faults at various ## 27# subsystems of the kernel. Please refer to the ltp/README ## 28# for the various kernel CONFIG options needed to exploit ## 29# all those features ## 30# ## 31# Author: Subrata Modak <subrata@linux.vnet.ibm.com> ## 32# ## 33# History: Aug 11 2009 - Created - Subrata Modak. ## 34# Aug 17 2009 - Changed the debugfs mount point - Subrata Modak.## 35################################################################################ 36 37if [ -z "$1" ] 38 then 39 #Check if Useage has been proper 40 echo "Usage: $0 <fault_percentage>" 41 exit 1 42fi 43 44#These are the types of Subsystems where fault will be injected 45#Make sure debugfs has been mounted 46for FAILTYPE in fail_io_timeout fail_make_request fail_page_alloc failslab 47do 48 echo $1 > /sys/kernel/debug/$FAILTYPE/probability 49 echo 100 > /sys/kernel/debug/$FAILTYPE/interval 50 echo -1 > /sys/kernel/debug/$FAILTYPE/times 51 echo 0 > /sys/kernel/debug/$FAILTYPE/space 52done 53 54