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authorAkinobu Mita2012-07-30 16:43:20 -0500
committerLinus Torvalds2012-07-30 19:25:22 -0500
commitc24aa64d169b7224f1a5bc6a4b1365da37ce861b (patch)
treee9974ad7a6edd7303c0b75d20fedcb7a7d5dd389 /tools/testing
parentd89dffa976bcd13fd87eb76e02e3b71c3a7868e3 (diff)
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fault-injection: add tool to run command with failslab or fail_page_alloc
This adds tools/testing/fault-injection/failcmd.sh to run a command while injecting slab/page allocation failures via fault injection. Example: Run a command "make -C tools/testing/selftests/ run_tests" with injecting slab allocation failure. # ./tools/testing/fault-injection/failcmd.sh \ -- make -C tools/testing/selftests/ run_tests Same as above except to specify 100 times failures at most instead of one time at most by default. # ./tools/testing/fault-injection/failcmd.sh --times=100 \ -- make -C tools/testing/selftests/ run_tests Same as above except to inject page allocation failure instead of slab allocation failure. # env FAILCMD_TYPE=fail_page_alloc \ ./tools/testing/fault-injection/failcmd.sh --times=100 \ -- make -C tools/testing/selftests/ run_tests Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools/testing')
-rw-r--r--tools/testing/fault-injection/failcmd.sh219
1 files changed, 219 insertions, 0 deletions
diff --git a/tools/testing/fault-injection/failcmd.sh b/tools/testing/fault-injection/failcmd.sh
new file mode 100644
index 000000000000..1776e924b202
--- /dev/null
+++ b/tools/testing/fault-injection/failcmd.sh
@@ -0,0 +1,219 @@
1#!/bin/bash
2#
3# NAME
4# failcmd.sh - run a command with injecting slab/page allocation failures
5#
6# SYNOPSIS
7# failcmd.sh --help
8# failcmd.sh [<options>] command [arguments]
9#
10# DESCRIPTION
11# Run command with injecting slab/page allocation failures by fault
12# injection.
13#
14# NOTE: you need to run this script as root.
15#
16
17usage()
18{
19 cat >&2 <<EOF
20Usage: $0 [options] command [arguments]
21
22OPTIONS
23 -p percent
24 --probability=percent
25 likelihood of failure injection, in percent.
26 Default value is 1
27
28 -t value
29 --times=value
30 specifies how many times failures may happen at most.
31 Default value is 1
32
33 --oom-kill-allocating-task=value
34 set /proc/sys/vm/oom_kill_allocating_task to specified value
35 before running the command.
36 Default value is 1
37
38 -h, --help
39 Display a usage message and exit
40
41 --interval=value, --space=value, --verbose=value, --task-filter=value,
42 --stacktrace-depth=value, --require-start=value, --require-end=value,
43 --reject-start=value, --reject-end=value, --ignore-gfp-wait=value
44 See Documentation/fault-injection/fault-injection.txt for more
45 information
46
47 failslab options:
48 --cache-filter=value
49
50 fail_page_alloc options:
51 --ignore-gfp-highmem=value, --min-order=value
52
53ENVIRONMENT
54 FAILCMD_TYPE
55 The following values for FAILCMD_TYPE are recognized:
56
57 failslab
58 inject slab allocation failures
59 fail_page_alloc
60 inject page allocation failures
61
62 If FAILCMD_TYPE is not defined, then failslab is used.
63EOF
64}
65
66if [ $UID != 0 ]; then
67 echo must be run as root >&2
68 exit 1
69fi
70
71DEBUGFS=`mount -t debugfs | head -1 | awk '{ print $3}'`
72
73if [ ! -d "$DEBUGFS" ]; then
74 echo debugfs is not mounted >&2
75 exit 1
76fi
77
78FAILCMD_TYPE=${FAILCMD_TYPE:-failslab}
79FAULTATTR=$DEBUGFS/$FAILCMD_TYPE
80
81if [ ! -d $FAULTATTR ]; then
82 echo $FAILCMD_TYPE is not available >&2
83 exit 1
84fi
85
86LONGOPTS=probability:,interval:,times:,space:,verbose:,task-filter:
87LONGOPTS=$LONGOPTS,stacktrace-depth:,require-start:,require-end:
88LONGOPTS=$LONGOPTS,reject-start:,reject-end:,oom-kill-allocating-task:,help
89
90if [ $FAILCMD_TYPE = failslab ]; then
91 LONGOPTS=$LONGOPTS,ignore-gfp-wait:,cache-filter:
92elif [ $FAILCMD_TYPE = fail_page_alloc ]; then
93 LONGOPTS=$LONGOPTS,ignore-gfp-wait:,ignore-gfp-highmem:,min-order:
94fi
95
96TEMP=`getopt -o p:i:t:s:v:h --long $LONGOPTS -n 'failcmd.sh' -- "$@"`
97
98if [ $? != 0 ]; then
99 usage
100 exit 1
101fi
102
103eval set -- "$TEMP"
104
105fault_attr_default()
106{
107 echo N > $FAULTATTR/task-filter
108 echo 0 > $FAULTATTR/probability
109 echo 1 > $FAULTATTR/times
110}
111
112fault_attr_default
113
114oom_kill_allocating_task_saved=`cat /proc/sys/vm/oom_kill_allocating_task`
115
116restore_values()
117{
118 fault_attr_default
119 echo $oom_kill_allocating_task_saved \
120 > /proc/sys/vm/oom_kill_allocating_task
121}
122
123#
124# Default options
125#
126declare -i oom_kill_allocating_task=1
127declare task_filter=Y
128declare -i probability=1
129declare -i times=1
130
131while true; do
132 case "$1" in
133 -p|--probability)
134 probability=$2
135 shift 2
136 ;;
137 -i|--interval)
138 echo $2 > $FAULTATTR/interval
139 shift 2
140 ;;
141 -t|--times)
142 times=$2
143 shift 2
144 ;;
145 -s|--space)
146 echo $2 > $FAULTATTR/space
147 shift 2
148 ;;
149 -v|--verbose)
150 echo $2 > $FAULTATTR/verbose
151 shift 2
152 ;;
153 --task-filter)
154 task_filter=$2
155 shift 2
156 ;;
157 --stacktrace-depth)
158 echo $2 > $FAULTATTR/stacktrace-depth
159 shift 2
160 ;;
161 --require-start)
162 echo $2 > $FAULTATTR/require-start
163 shift 2
164 ;;
165 --require-end)
166 echo $2 > $FAULTATTR/require-end
167 shift 2
168 ;;
169 --reject-start)
170 echo $2 > $FAULTATTR/reject-start
171 shift 2
172 ;;
173 --reject-end)
174 echo $2 > $FAULTATTR/reject-end
175 shift 2
176 ;;
177 --oom-kill-allocating-task)
178 oom_kill_allocating_task=$2
179 shift 2
180 ;;
181 --ignore-gfp-wait)
182 echo $2 > $FAULTATTR/ignore-gfp-wait
183 shift 2
184 ;;
185 --cache-filter)
186 echo $2 > $FAULTATTR/cache_filter
187 shift 2
188 ;;
189 --ignore-gfp-highmem)
190 echo $2 > $FAULTATTR/ignore-gfp-highmem
191 shift 2
192 ;;
193 --min-order)
194 echo $2 > $FAULTATTR/min-order
195 shift 2
196 ;;
197 -h|--help)
198 usage
199 exit 0
200 shift
201 ;;
202 --)
203 shift
204 break
205 ;;
206 esac
207done
208
209[ -z "$@" ] && exit 0
210
211echo $oom_kill_allocating_task > /proc/sys/vm/oom_kill_allocating_task
212echo $task_filter > $FAULTATTR/task-filter
213echo $probability > $FAULTATTR/probability
214echo $times > $FAULTATTR/times
215
216trap "restore_values" SIGINT SIGTERM EXIT
217
218cmd="echo 1 > /proc/self/make-it-fail && exec $@"
219bash -c "$cmd"