selftests/memory-hotplug/mem-on-off-test.sh

2 # SPDX-License-Identifier: GPL-2.0
6 # Kselftest framework requirement - SKIP code is 4.
18 	SYSFS=`mount -t sysfs | head -1 | awk '{ print $3 }'`
20 	if [ ! -d "$SYSFS" ]; then
25 	if ! ls $SYSFS/devices/system/memory/memory* > /dev/null 2>&1; then
26 		echo $msg memory hotplug is not supported >&2
30 	if ! grep -q 1 $SYSFS/devices/system/memory/memory*/removable; then
31 		echo $msg no hot-pluggable memory >&2
37 # list all hot-pluggable memory
41 	local state=${1:-.\*}
43 	for memory in $SYSFS/devices/system/memory/memory*; do
44 		if grep -q 1 $memory/removable &&
45 		   grep -q $state $memory/state; then
46 			echo ${memory##/*/memory}
63 	grep -q online $SYSFS/devices/system/memory/memory$1/state
68 	grep -q offline $SYSFS/devices/system/memory/memory$1/state
73 	echo online > $SYSFS/devices/system/memory/memory$1/state
78 	echo offline > $SYSFS/devices/system/memory/memory$1/state
83 	local memory=$1
85 	if ! online_memory $memory; then
86 		echo $FUNCNAME $memory: unexpected fail >&2
88 	elif ! memory_is_online $memory; then
89 		echo $FUNCNAME $memory: unexpected offline >&2
97 	local memory=$1
99 	if online_memory $memory 2> /dev/null; then
100 		echo $FUNCNAME $memory: unexpected success >&2
102 	elif ! memory_is_offline $memory; then
103 		echo $FUNCNAME $memory: unexpected online >&2
111 	local memory=$1
113 	if ! offline_memory $memory; then
114 		echo $FUNCNAME $memory: unexpected fail >&2
116 	elif ! memory_is_offline $memory; then
117 		echo $FUNCNAME $memory: unexpected offline >&2
125 	local memory=$1
127 	if offline_memory $memory 2> /dev/null; then
128 		echo $FUNCNAME $memory: unexpected success >&2
130 	elif ! memory_is_online $memory; then
131 		echo $FUNCNAME $memory: unexpected offline >&2
137 error=-12
149 		echo "Usage $0 [ -e errno ] [ -p notifier-priority ] [ -r percent-of-memory-to-offline ]"
157 		if [ "$ratio" -gt 100 ] || [ "$ratio" -lt 0 ]; then
165 if ! [ "$error" -ge -4095 -a "$error" -lt 0 ]; then
166 	echo "error code must be -4095 <= errno < 0" >&2
172 echo "Test scope: $ratio% hotplug memory"
175 # Online all hot-pluggable memory
177 hotpluggable_num=`hotpluggable_offline_memory | wc -l`
178 echo -e "\t online all hot-pluggable memory in offline state:"
179 if [ "$hotpluggable_num" -gt 0 ]; then
180 	for memory in `hotpluggable_offline_memory`; do
181 		echo "offline->online memory$memory"
182 		if ! online_memory_expect_success $memory; then
187 	echo -e "\t\t SKIPPED - no hot-pluggable memory in offline state"
191 # Offline $ratio percent of hot-pluggable memory
193 hotpluggable_num=`hotpluggable_online_memory | wc -l`
195 echo -e "\t offline $ratio% hot-pluggable memory in online state"
196 echo -e "\t trying to offline $target out of $hotpluggable_num memory block(s):"
197 for memory in `hotpluggable_online_memory`; do
198 	if [ "$target" -gt 0 ]; then
199 		echo "online->offline memory$memory"
200 		if offline_memory_expect_success $memory; then
201 			target=$(($target - 1))
205 if [ "$target" -gt 0 ]; then
207 	echo -e "\t\t FAILED - unable to offline some memory blocks, device busy?"
211 # Online all hot-pluggable memory again
213 hotpluggable_num=`hotpluggable_offline_memory | wc -l`
214 echo -e "\t online all hot-pluggable memory in offline state:"
215 if [ "$hotpluggable_num" -gt 0 ]; then
216 	for memory in `hotpluggable_offline_memory`; do
217 		echo "offline->online memory$memory"
218 		if ! online_memory_expect_success $memory; then
223 	echo -e "\t\t SKIPPED - no hot-pluggable memory in offline state"
227 # Test with memory notifier error injection
230 DEBUGFS=`mount -t debugfs | head -1 | awk '{ print $3 }'`
231 NOTIFIER_ERR_INJECT_DIR=$DEBUGFS/notifier-error-inject/memory
237 	/sbin/modprobe -q -r memory-notifier-error-inject
238 	/sbin/modprobe -q memory-notifier-error-inject priority=$priority
240 	if [ ! -d "$DEBUGFS" ]; then
245 	if [ ! -d $NOTIFIER_ERR_INJECT_DIR ]; then
246 		echo $msg memory-notifier-error-inject module is not available >&2
251 echo -e "\t Test with memory notifier error injection"
255 # Offline $ratio percent of hot-pluggable memory
258 for memory in `hotpluggable_online_memory`; do
259 	if [ $((RANDOM % 100)) -lt $ratio ]; then
260 		offline_memory_expect_success $memory
265 # Test memory hot-add error handling (offline => online)
268 for memory in `hotpluggable_offline_memory`; do
269 	online_memory_expect_fail $memory
273 # Online all hot-pluggable memory
276 for memory in `hotpluggable_offline_memory`; do
277 	online_memory_expect_success $memory
281 # Test memory hot-remove error handling (online => offline)
284 for memory in `hotpluggable_online_memory`; do
285 	offline_memory_expect_fail $memory
289 /sbin/modprobe -q -r memory-notifier-error-inject