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

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

On Wed, 2009-08-12 at 01:45 -0700, Garrett Cooper wrote: 
> On Tue, Aug 11, 2009 at 10:30 AM, Subrata
> Modak<subrata@linux.vnet.ibm.com> wrote:
> > 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.
> >
> > Signed-off-by: Subrata Modak <subrata@linux.vnet.ibm.com>
> > ---
> >
> > diff -uprN ltp-full-20090731.orig/tools/insert_kernel_faults.sh ltp-full-20090731/tools/insert_kernel_faults.sh
> > --- 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     2009-08-11 18:44:45.000000000 +0530
> > @@ -0,0 +1,52 @@
> > +#!/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.                       ##
> > +################################################################################
> > +
> > +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 `echo fail_io_timeout fail_make_request fail_page_alloc failslab`
> > +do
> > +       echo $1 > /debug/$FAILTYPE/probability
> > +       echo 100 > /debug/$FAILTYPE/interval
> > +       echo -1 > /debug/$FAILTYPE/times
> > +       echo 0 > /debug/$FAILTYPE/space
> > +done
> 
>     Why ```for FAILTYPE in `echo list-of-values`'''? ```for FAILTYPE
> in list-of-values''' works just as well without the echo.

Oops. True. I will do that. Let me hear some more comments from people
and i will redo the patches again.

Regards--
Subrata

> Thanks,
> -Garrett


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