testing/fault-injection/failcmd.sh

2 # SPDX-License-Identifier: GPL-2.0
5 #	failcmd.sh - run a command with injecting slab/page allocation failures
8 #	failcmd.sh --help
12 #	Run command with injecting slab/page allocation failures by fault
24 	-p percent
25 	--probability=percent
29 	-t value
30 	--times=value
34 	--oom-kill-allocating-task=value
39 	-h, --help
42 	--interval=value, --space=value, --verbose=value, --task-filter=value,
43 	--stacktrace-depth=value, --require-start=value, --require-end=value,
44 	--reject-start=value, --reject-end=value, --ignore-gfp-wait=value
45 		See Documentation/fault-injection/fault-injection.rst for more
49 	--cache-filter=value
52 	--ignore-gfp-highmem=value, --min-order=value
59 			inject slab allocation failures
61 			inject page allocation failures
69     if ! [[ $value =~ ^0x[0-9a-fA-F]+$ ]]; then
80 DEBUGFS=`mount -t debugfs | head -1 | awk '{ print $3}'`
82 if [ ! -d "$DEBUGFS" ]; then
87 FAILCMD_TYPE=${FAILCMD_TYPE:-failslab}
90 if [ ! -d $FAULTATTR ]; then
95 LONGOPTS=probability:,interval:,times:,space:,verbose:,task-filter:
96 LONGOPTS=$LONGOPTS,stacktrace-depth:,require-start:,require-end:
97 LONGOPTS=$LONGOPTS,reject-start:,reject-end:,oom-kill-allocating-task:,help
100 	LONGOPTS=$LONGOPTS,ignore-gfp-wait:,cache-filter:
102 	LONGOPTS=$LONGOPTS,ignore-gfp-wait:,ignore-gfp-highmem:,min-order:
105 TEMP=`getopt -o p:i:t:s:v:h --long $LONGOPTS -n 'failcmd.sh' -- "$@"`
112 eval set -- "$TEMP"
116 	echo N > $FAULTATTR/task-filter
135 declare -i oom_kill_allocating_task=1
137 declare -i probability=1
138 declare -i times=1
142 	-p|--probability)
146 	-i|--interval)
150 	-t|--times)
154 	-s|--space)
158 	-v|--verbose)
162 	--task-filter)
166 	--stacktrace-depth)
167 		echo $2 > $FAULTATTR/stacktrace-depth
170 	--require-start)
172 		echo $2 > $FAULTATTR/require-start
175 	--require-end)
177 		echo $2 > $FAULTATTR/require-end
180 	--reject-start)
182 		echo $2 > $FAULTATTR/reject-start
185 	--reject-end)
187 		echo $2 > $FAULTATTR/reject-end
190 	--oom-kill-allocating-task)
194 	--ignore-gfp-wait)
195 		echo $2 > $FAULTATTR/ignore-gfp-wait
198 	--cache-filter)
202 	--ignore-gfp-highmem)
203 		echo $2 > $FAULTATTR/ignore-gfp-highmem
206 	--min-order)
207 		echo $2 > $FAULTATTR/min-order
210 	-h|--help)
215 	--)
222 [ -z "$1" ] && exit 0
225 echo $task_filter > $FAULTATTR/task-filter
231 cmd="echo 1 > /proc/self/make-it-fail && exec $@"
232 bash -c "$cmd"