1 #!/bin/bash 2 # SPDX-License-Identifier: GPL-2.0 3 4 SYSFS= 5 6 prerequisite() 7 { 8 msg="skip all tests:" 9 10 if [ $UID != 0 ]; then 11 echo $msg must be run as root >&2 12 exit 0 13 fi 14 15 SYSFS=`mount -t sysfs | head -1 | awk '{ print $3 }'` 16 17 if [ ! -d "$SYSFS" ]; then 18 echo $msg sysfs is not mounted >&2 19 exit 0 20 fi 21 22 if ! ls $SYSFS/devices/system/memory/memory* > /dev/null 2>&1; then 23 echo $msg memory hotplug is not supported >&2 24 exit 0 25 fi 26 27 if ! grep -q 1 $SYSFS/devices/system/memory/memory*/removable; then 28 echo $msg no hot-pluggable memory >&2 29 exit 0 30 fi 31 } 32 33 # 34 # list all hot-pluggable memory 35 # 36 hotpluggable_memory() 37 { 38 local state=${1:-.\*} 39 40 for memory in $SYSFS/devices/system/memory/memory*; do 41 if grep -q 1 $memory/removable && 42 grep -q $state $memory/state; then 43 echo ${memory##/*/memory} 44 fi 45 done 46 } 47 48 hotpluggable_offline_memory() 49 { 50 hotpluggable_memory offline 51 } 52 53 hotpluggable_online_memory() 54 { 55 hotpluggable_memory online 56 } 57 58 memory_is_online() 59 { 60 grep -q online $SYSFS/devices/system/memory/memory$1/state 61 } 62 63 memory_is_offline() 64 { 65 grep -q offline $SYSFS/devices/system/memory/memory$1/state 66 } 67 68 online_memory() 69 { 70 echo online > $SYSFS/devices/system/memory/memory$1/state 71 } 72 73 offline_memory() 74 { 75 echo offline > $SYSFS/devices/system/memory/memory$1/state 76 } 77 78 online_memory_expect_success() 79 { 80 local memory=$1 81 82 if ! online_memory $memory; then 83 echo $FUNCNAME $memory: unexpected fail >&2 84 return 1 85 elif ! memory_is_online $memory; then 86 echo $FUNCNAME $memory: unexpected offline >&2 87 return 1 88 fi 89 return 0 90 } 91 92 online_memory_expect_fail() 93 { 94 local memory=$1 95 96 if online_memory $memory 2> /dev/null; then 97 echo $FUNCNAME $memory: unexpected success >&2 98 return 1 99 elif ! memory_is_offline $memory; then 100 echo $FUNCNAME $memory: unexpected online >&2 101 return 1 102 fi 103 return 0 104 } 105 106 offline_memory_expect_success() 107 { 108 local memory=$1 109 110 if ! offline_memory $memory; then 111 echo $FUNCNAME $memory: unexpected fail >&2 112 return 1 113 elif ! memory_is_offline $memory; then 114 echo $FUNCNAME $memory: unexpected offline >&2 115 return 1 116 fi 117 return 0 118 } 119 120 offline_memory_expect_fail() 121 { 122 local memory=$1 123 124 if offline_memory $memory 2> /dev/null; then 125 echo $FUNCNAME $memory: unexpected success >&2 126 return 1 127 elif ! memory_is_online $memory; then 128 echo $FUNCNAME $memory: unexpected offline >&2 129 return 1 130 fi 131 return 0 132 } 133 134 error=-12 135 priority=0 136 ratio=10 137 retval=0 138 139 while getopts e:hp:r: opt; do 140 case $opt in 141 e) 142 error=$OPTARG 143 ;; 144 h) 145 echo "Usage $0 [ -e errno ] [ -p notifier-priority ] [ -r percent-of-memory-to-offline ]" 146 exit 147 ;; 148 p) 149 priority=$OPTARG 150 ;; 151 r) 152 ratio=$OPTARG 153 if [ "$ratio" -gt 100 ] || [ "$ratio" -lt 0 ]; then 154 echo "The percentage should be an integer within 0~100 range" 155 exit 1 156 fi 157 ;; 158 esac 159 done 160 161 if ! [ "$error" -ge -4095 -a "$error" -lt 0 ]; then 162 echo "error code must be -4095 <= errno < 0" >&2 163 exit 1 164 fi 165 166 prerequisite 167 168 echo "Test scope: $ratio% hotplug memory" 169 170 # 171 # Online all hot-pluggable memory 172 # 173 hotpluggable_num=`hotpluggable_offline_memory | wc -l` 174 echo -e "\t online all hot-pluggable memory in offline state:" 175 if [ "$hotpluggable_num" -gt 0 ]; then 176 for memory in `hotpluggable_offline_memory`; do 177 echo "offline->online memory$memory" 178 if ! online_memory_expect_success $memory; then 179 retval=1 180 fi 181 done 182 else 183 echo -e "\t\t SKIPPED - no hot-pluggable memory in offline state" 184 fi 185 186 # 187 # Offline $ratio percent of hot-pluggable memory 188 # 189 hotpluggable_num=`hotpluggable_online_memory | wc -l` 190 target=`echo "a=$hotpluggable_num*$ratio; if ( a%100 ) a/100+1 else a/100" | bc` 191 echo -e "\t offline $ratio% hot-pluggable memory in online state" 192 echo -e "\t trying to offline $target out of $hotpluggable_num memory block(s):" 193 for memory in `hotpluggable_online_memory`; do 194 if [ "$target" -gt 0 ]; then 195 echo "online->offline memory$memory" 196 if offline_memory_expect_success $memory; then 197 target=$(($target - 1)) 198 fi 199 fi 200 done 201 if [ "$target" -gt 0 ]; then 202 retval=1 203 echo -e "\t\t FAILED - unable to offline some memory blocks, device busy?" 204 fi 205 206 # 207 # Online all hot-pluggable memory again 208 # 209 hotpluggable_num=`hotpluggable_offline_memory | wc -l` 210 echo -e "\t online all hot-pluggable memory in offline state:" 211 if [ "$hotpluggable_num" -gt 0 ]; then 212 for memory in `hotpluggable_offline_memory`; do 213 echo "offline->online memory$memory" 214 if ! online_memory_expect_success $memory; then 215 retval=1 216 fi 217 done 218 else 219 echo -e "\t\t SKIPPED - no hot-pluggable memory in offline state" 220 fi 221 222 # 223 # Test with memory notifier error injection 224 # 225 226 DEBUGFS=`mount -t debugfs | head -1 | awk '{ print $3 }'` 227 NOTIFIER_ERR_INJECT_DIR=$DEBUGFS/notifier-error-inject/memory 228 229 prerequisite_extra() 230 { 231 msg="skip extra tests:" 232 233 /sbin/modprobe -q -r memory-notifier-error-inject 234 /sbin/modprobe -q memory-notifier-error-inject priority=$priority 235 236 if [ ! -d "$DEBUGFS" ]; then 237 echo $msg debugfs is not mounted >&2 238 exit $retval 239 fi 240 241 if [ ! -d $NOTIFIER_ERR_INJECT_DIR ]; then 242 echo $msg memory-notifier-error-inject module is not available >&2 243 exit $retval 244 fi 245 } 246 247 echo -e "\t Test with memory notifier error injection" 248 prerequisite_extra 249 250 # 251 # Offline $ratio percent of hot-pluggable memory 252 # 253 echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_OFFLINE/error 254 for memory in `hotpluggable_online_memory`; do 255 if [ $((RANDOM % 100)) -lt $ratio ]; then 256 offline_memory_expect_success $memory 257 fi 258 done 259 260 # 261 # Test memory hot-add error handling (offline => online) 262 # 263 echo $error > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_ONLINE/error 264 for memory in `hotpluggable_offline_memory`; do 265 online_memory_expect_fail $memory 266 done 267 268 # 269 # Online all hot-pluggable memory 270 # 271 echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_ONLINE/error 272 for memory in `hotpluggable_offline_memory`; do 273 online_memory_expect_success $memory 274 done 275 276 # 277 # Test memory hot-remove error handling (online => offline) 278 # 279 echo $error > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_OFFLINE/error 280 for memory in `hotpluggable_online_memory`; do 281 offline_memory_expect_fail $memory 282 done 283 284 echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_OFFLINE/error 285 /sbin/modprobe -q -r memory-notifier-error-inject 286 287 exit $retval 288
