Documentation/fault-injection/failmodule.sh

   1 #!/bin/bash
   2 #
   3 # Usage: failmodule <failname> <modulename> [stacktrace-depth]
   4 #
   5 #       <failname>: "failslab", "fail_alloc_page", or "fail_make_request"
   6 #
   7 #       <modulename>: module name that you want to inject faults.
   8 #
   9 #       [stacktrace-depth]: the maximum number of stacktrace walking allowed
  10 #
  11
  12 STACKTRACE_DEPTH=5
  13 if [ $# -gt 2 ]; then
  14         STACKTRACE_DEPTH=$3
  15 fi
  16
  17 if [ ! -d /debug/$1 ]; then
  18         echo "Fault-injection $1 does not exist" >&2
  19         exit 1
  20 fi
  21 if [ ! -d /sys/module/$2 ]; then
  22         echo "Module $2 does not exist" >&2
  23         exit 1
  24 fi
  25
  26 # Disable any fault injection
  27 echo 0 > /debug/$1/stacktrace-depth
  28
  29 echo `cat /sys/module/$2/sections/.text` > /debug/$1/require-start
  30 echo `cat /sys/module/$2/sections/.exit.text` > /debug/$1/require-end
  31 echo $STACKTRACE_DEPTH > /debug/$1/stacktrace-depth