summaryrefslogtreecommitdiff
path: root/tools/testing/selftests/memory-hotplug/mem-on-off-test.sh
blob: b37585e6aa386829d701b02983d51f7353ac507f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0

SYSFS=

# Kselftest framework requirement - SKIP code is 4.
ksft_skip=4

prerequisite()
{
	msg="skip all tests:"

	if [ $UID != 0 ]; then
		echo $msg must be run as root >&2
		exit $ksft_skip
	fi

	SYSFS=`mount -t sysfs | head -1 | awk '{ print $3 }'`

	if [ ! -d "$SYSFS" ]; then
		echo $msg sysfs is not mounted >&2
		exit $ksft_skip
	fi

	if ! ls $SYSFS/devices/system/memory/memory* > /dev/null 2>&1; then
		echo $msg memory hotplug is not supported >&2
		exit $ksft_skip
	fi

	if ! grep -q 1 $SYSFS/devices/system/memory/memory*/removable; then
		echo $msg no hot-pluggable memory >&2
		exit $ksft_skip
	fi
}

#
# list all hot-pluggable memory
#
hotpluggable_memory()
{
	local state=${1:-.\*}

	for memory in $SYSFS/devices/system/memory/memory*; do
		if grep -q 1 $memory/removable &&
		   grep -q $state $memory/state; then
			echo ${memory##/*/memory}
		fi
	done
}

hotpluggable_offline_memory()
{
	hotpluggable_memory offline
}

hotpluggable_online_memory()
{
	hotpluggable_memory online
}

memory_is_online()
{
	grep -q online $SYSFS/devices/system/memory/memory$1/state
}

memory_is_offline()
{
	grep -q offline $SYSFS/devices/system/memory/memory$1/state
}

online_memory()
{
	echo online > $SYSFS/devices/system/memory/memory$1/state
}

offline_memory()
{
	echo offline > $SYSFS/devices/system/memory/memory$1/state
}

online_memory_expect_success()
{
	local memory=$1

	if ! online_memory $memory; then
		echo $FUNCNAME $memory: unexpected fail >&2
		return 1
	elif ! memory_is_online $memory; then
		echo $FUNCNAME $memory: unexpected offline >&2
		return 1
	fi
	return 0
}

online_memory_expect_fail()
{
	local memory=$1

	if online_memory $memory 2> /dev/null; then
		echo $FUNCNAME $memory: unexpected success >&2
		return 1
	elif ! memory_is_offline $memory; then
		echo $FUNCNAME $memory: unexpected online >&2
		return 1
	fi
	return 0
}

offline_memory_expect_success()
{
	local memory=$1

	if ! offline_memory $memory; then
		echo $FUNCNAME $memory: unexpected fail >&2
		return 1
	elif ! memory_is_offline $memory; then
		echo $FUNCNAME $memory: unexpected offline >&2
		return 1
	fi
	return 0
}

offline_memory_expect_fail()
{
	local memory=$1

	if offline_memory $memory 2> /dev/null; then
		echo $FUNCNAME $memory: unexpected success >&2
		return 1
	elif ! memory_is_online $memory; then
		echo $FUNCNAME $memory: unexpected offline >&2
		return 1
	fi
	return 0
}

error=-12
priority=0
# Run with default of ratio=2 for Kselftest run
ratio=2
retval=0

while getopts e:hp:r: opt; do
	case $opt in
	e)
		error=$OPTARG
		;;
	h)
		echo "Usage $0 [ -e errno ] [ -p notifier-priority ] [ -r percent-of-memory-to-offline ]"
		exit
		;;
	p)
		priority=$OPTARG
		;;
	r)
		ratio=$OPTARG
		if [ "$ratio" -gt 100 ] || [ "$ratio" -lt 0 ]; then
			echo "The percentage should be an integer within 0~100 range"
			exit 1
		fi
		;;
	esac
done

if ! [ "$error" -ge -4095 -a "$error" -lt 0 ]; then
	echo "error code must be -4095 <= errno < 0" >&2
	exit 1
fi

prerequisite

echo "Test scope: $ratio% hotplug memory"

#
# Online all hot-pluggable memory
#
hotpluggable_num=`hotpluggable_offline_memory | wc -l`
echo -e "\t online all hot-pluggable memory in offline state:"
if [ "$hotpluggable_num" -gt 0 ]; then
	for memory in `hotpluggable_offline_memory`; do
		echo "offline->online memory$memory"
		if ! online_memory_expect_success $memory; then
			retval=1
		fi
	done
else
	echo -e "\t\t SKIPPED - no hot-pluggable memory in offline state"
fi

#
# Offline $ratio percent of hot-pluggable memory
#
hotpluggable_num=`hotpluggable_online_memory | wc -l`
target=`echo "a=$hotpluggable_num*$ratio; if ( a%100 ) a/100+1 else a/100" | bc`
echo -e "\t offline $ratio% hot-pluggable memory in online state"
echo -e "\t trying to offline $target out of $hotpluggable_num memory block(s):"
for memory in `hotpluggable_online_memory`; do
	if [ "$target" -gt 0 ]; then
		echo "online->offline memory$memory"
		if offline_memory_expect_success $memory; then
			target=$(($target - 1))
		fi
	fi
done
if [ "$target" -gt 0 ]; then
	retval=1
	echo -e "\t\t FAILED - unable to offline some memory blocks, device busy?"
fi

#
# Online all hot-pluggable memory again
#
hotpluggable_num=`hotpluggable_offline_memory | wc -l`
echo -e "\t online all hot-pluggable memory in offline state:"
if [ "$hotpluggable_num" -gt 0 ]; then
	for memory in `hotpluggable_offline_memory`; do
		echo "offline->online memory$memory"
		if ! online_memory_expect_success $memory; then
			retval=1
		fi
	done
else
	echo -e "\t\t SKIPPED - no hot-pluggable memory in offline state"
fi

#
# Test with memory notifier error injection
#

DEBUGFS=`mount -t debugfs | head -1 | awk '{ print $3 }'`
NOTIFIER_ERR_INJECT_DIR=$DEBUGFS/notifier-error-inject/memory

prerequisite_extra()
{
	msg="skip extra tests:"

	/sbin/modprobe -q -r memory-notifier-error-inject
	/sbin/modprobe -q memory-notifier-error-inject priority=$priority

	if [ ! -d "$DEBUGFS" ]; then
		echo $msg debugfs is not mounted >&2
		exit $retval
	fi

	if [ ! -d $NOTIFIER_ERR_INJECT_DIR ]; then
		echo $msg memory-notifier-error-inject module is not available >&2
		exit $retval
	fi
}

echo -e "\t Test with memory notifier error injection"
prerequisite_extra

#
# Offline $ratio percent of hot-pluggable memory
#
echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_OFFLINE/error
for memory in `hotpluggable_online_memory`; do
	if [ $((RANDOM % 100)) -lt $ratio ]; then
		offline_memory_expect_success $memory
	fi
done

#
# Test memory hot-add error handling (offline => online)
#
echo $error > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_ONLINE/error
for memory in `hotpluggable_offline_memory`; do
	online_memory_expect_fail $memory
done

#
# Online all hot-pluggable memory
#
echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_ONLINE/error
for memory in `hotpluggable_offline_memory`; do
	online_memory_expect_success $memory
done

#
# Test memory hot-remove error handling (online => offline)
#
echo $error > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_OFFLINE/error
for memory in `hotpluggable_online_memory`; do
	offline_memory_expect_fail $memory
done

echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_OFFLINE/error
/sbin/modprobe -q -r memory-notifier-error-inject

exit $retval