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Diffstat (limited to 'Documentation/fault-injection/failmodule.sh')
| -rw-r--r-- | Documentation/fault-injection/failmodule.sh | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/fault-injection/failmodule.sh b/Documentation/fault-injection/failmodule.sh new file mode 100644 index 000000000000..474a8b971f9c --- /dev/null +++ b/Documentation/fault-injection/failmodule.sh @@ -0,0 +1,31 @@ +#!/bin/bash +# +# Usage: failmodule <failname> <modulename> [stacktrace-depth] +# +# <failname>: "failslab", "fail_alloc_page", or "fail_make_request" +# +# <modulename>: module name that you want to inject faults. +# +# [stacktrace-depth]: the maximum number of stacktrace walking allowed +# + +STACKTRACE_DEPTH=5 +if [ $# -gt 2 ]; then + STACKTRACE_DEPTH=$3 +fi + +if [ ! -d /debug/$1 ]; then + echo "Fault-injection $1 does not exist" >&2 + exit 1 +fi +if [ ! -d /sys/module/$2 ]; then + echo "Module $2 does not exist" >&2 + exit 1 +fi + +# Disable any fault injection +echo 0 > /debug/$1/stacktrace-depth + +echo `cat /sys/module/$2/sections/.text` > /debug/$1/require-start +echo `cat /sys/module/$2/sections/.exit.text` > /debug/$1/require-end +echo $STACKTRACE_DEPTH > /debug/$1/stacktrace-depth |