[deliverable/linux.git] / Documentation / fault-injection / failmodule.sh

#!/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
Commit	Line	Data
de1ba09b AM	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
5d0ffa2b DM	29	echo `cat /sys/module/$2/sections/.text` > /debug/$1/require-start
5d0ffa2b DM	30	echo `cat /sys/module/$2/sections/.exit.text` > /debug/$1/require-end
de1ba09b	31	echo $STACKTRACE_DEPTH > /debug/$1/stacktrace-depth