aboutsummaryrefslogtreecommitdiff
path: root/tools/testing/selftests/memory-hotplug/on-off-test.sh
blob: a2816f631542134ddeae828e7ad688d1c2653fe3 (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
#!/bin/bash

SYSFS=

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

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

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

	if [ ! -d "$SYSFS" ]; then
		echo $msg sysfs is not mounted >&2
		exit 0
	fi

	if ! ls $SYSFS/devices/system/memory/memory* > /dev/null 2>&1; then
		echo $msg memory hotplug is not supported >&2
		exit 0
	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
}

hotplaggable_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
	elif ! memory_is_online $memory; then
		echo $FUNCNAME $memory: unexpected offline >&2
	fi
}

online_memory_expect_fail()
{
	local memory=$1

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

offline_memory_expect_success()
{
	local memory=$1

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

offline_memory_expect_fail()
{
	local memory=$1

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

error=-12
priority=0
ratio=10

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
		;;
	esac
done

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

prerequisite

#
# Online all hot-pluggable memory
#
for memory in `hotplaggable_offline_memory`; do
	online_memory_expect_success $memory
done

#
# Offline $ratio percent of hot-pluggable memory
#
for memory in `hotpluggable_online_memory`; do
	if [ $((RANDOM % 100)) -lt $ratio ]; then
		offline_memory_expect_success $memory
	fi
done

#
# Online all hot-pluggable memory again
#
for memory in `hotplaggable_offline_memory`; do
	online_memory_expect_success $memory
done

#
# 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 0
	fi

	if [ ! -d $NOTIFIER_ERR_INJECT_DIR ]; then
		echo $msg memory-notifier-error-inject module is not available >&2
		exit 0
	fi
}

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 `hotplaggable_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 `hotplaggable_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