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

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 SYSFS=
   5
   6 # Kselftest framework requirement - SKIP code is 4.
   7 ksft_skip=4
   8
   9 prerequisite()
  10 {
  11         msg="skip all tests:"
  12
  13         if [ $UID != 0 ]; then
  14                 echo $msg must be run as root >&2
  15                 exit $ksft_skip
  16         fi
  17
  18         SYSFS=`mount -t sysfs | head -1 | awk '{ print $3 }'`
  19
  20         if [ ! -d "$SYSFS" ]; then
  21                 echo $msg sysfs is not mounted >&2
  22                 exit $ksft_skip
  23         fi
  24
  25         if ! ls $SYSFS/devices/system/memory/memory* > /dev/null 2>&1; then
  26                 echo $msg memory hotplug is not supported >&2
  27                 exit $ksft_skip
  28         fi
  29
  30         if ! grep -q 1 $SYSFS/devices/system/memory/memory*/removable; then
  31                 echo $msg no hot-pluggable memory >&2
  32                 exit $ksft_skip
  33         fi
  34 }
  35
  36 #
  37 # list all hot-pluggable memory
  38 #
  39 hotpluggable_memory()
  40 {
  41         local state=${1:-.\*}
  42
  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}
  47                 fi
  48         done
  49 }
  50
  51 hotpluggable_offline_memory()
  52 {
  53         hotpluggable_memory offline
  54 }
  55
  56 hotpluggable_online_memory()
  57 {
  58         hotpluggable_memory online
  59 }
  60
  61 memory_is_online()
  62 {
  63         grep -q online $SYSFS/devices/system/memory/memory$1/state
  64 }
  65
  66 memory_is_offline()
  67 {
  68         grep -q offline $SYSFS/devices/system/memory/memory$1/state
  69 }
  70
  71 online_memory()
  72 {
  73         echo online > $SYSFS/devices/system/memory/memory$1/state
  74 }
  75
  76 offline_memory()
  77 {
  78         echo offline > $SYSFS/devices/system/memory/memory$1/state
  79 }
  80
  81 online_memory_expect_success()
  82 {
  83         local memory=$1
  84
  85         if ! online_memory $memory; then
  86                 echo $FUNCNAME $memory: unexpected fail >&2
  87                 return 1
  88         elif ! memory_is_online $memory; then
  89                 echo $FUNCNAME $memory: unexpected offline >&2
  90                 return 1
  91         fi
  92         return 0
  93 }
  94
  95 online_memory_expect_fail()
  96 {
  97         local memory=$1
  98
  99         if online_memory $memory 2> /dev/null; then
 100                 echo $FUNCNAME $memory: unexpected success >&2
 101                 return 1
 102         elif ! memory_is_offline $memory; then
 103                 echo $FUNCNAME $memory: unexpected online >&2
 104                 return 1
 105         fi
 106         return 0
 107 }
 108
 109 offline_memory_expect_success()
 110 {
 111         local memory=$1
 112
 113         if ! offline_memory $memory; then
 114                 echo $FUNCNAME $memory: unexpected fail >&2
 115                 return 1
 116         elif ! memory_is_offline $memory; then
 117                 echo $FUNCNAME $memory: unexpected offline >&2
 118                 return 1
 119         fi
 120         return 0
 121 }
 122
 123 offline_memory_expect_fail()
 124 {
 125         local memory=$1
 126
 127         if offline_memory $memory 2> /dev/null; then
 128                 echo $FUNCNAME $memory: unexpected success >&2
 129                 return 1
 130         elif ! memory_is_online $memory; then
 131                 echo $FUNCNAME $memory: unexpected offline >&2
 132                 return 1
 133         fi
 134         return 0
 135 }
 136
 137 error=-12
 138 priority=0
 139 # Run with default of ratio=2 for Kselftest run
 140 ratio=2
 141 retval=0
 142
 143 while getopts e:hp:r: opt; do
 144         case $opt in
 145         e)
 146                 error=$OPTARG
 147                 ;;
 148         h)
 149                 echo "Usage $0 [ -e errno ] [ -p notifier-priority ] [ -r percent-of-memory-to-offline ]"
 150                 exit
 151                 ;;
 152         p)
 153                 priority=$OPTARG
 154                 ;;
 155         r)
 156                 ratio=$OPTARG
 157                 if [ "$ratio" -gt 100 ] || [ "$ratio" -lt 0 ]; then
 158                         echo "The percentage should be an integer within 0~100 range"
 159                         exit 1
 160                 fi
 161                 ;;
 162         esac
 163 done
 164
 165 if ! [ "$error" -ge -4095 -a "$error" -lt 0 ]; then
 166         echo "error code must be -4095 <= errno < 0" >&2
 167         exit 1
 168 fi
 169
 170 prerequisite
 171
 172 echo "Test scope: $ratio% hotplug memory"
 173
 174 #
 175 # Online all hot-pluggable memory
 176 #
 177 hotpluggable_num=`hotpluggable_offline_memory | wc -l`
 178 echo -e "\t online all hot-pluggable memory in offline state:"
 179 if [ "$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
 183                         retval=1
 184                 fi
 185         done
 186 else
 187         echo -e "\t\t SKIPPED - no hot-pluggable memory in offline state"
 188 fi
 189
 190 #
 191 # Offline $ratio percent of hot-pluggable memory
 192 #
 193 hotpluggable_num=`hotpluggable_online_memory | wc -l`
 194 target=`echo "a=$hotpluggable_num*$ratio; if ( a%100 ) a/100+1 else a/100" | bc`
 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 $memory; then
 201                         target=$(($target - 1))
 202                 fi
 203         fi
 204 done
 205 if [ "$target" -gt 0 ]; then
 206         retval=1
 207         echo -e "\t\t FAILED - unable to offline some memory blocks, device busy?"
 208 fi
 209
 210 #
 211 # Online all hot-pluggable memory again
 212 #
 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
 219                         retval=1
 220                 fi
 221         done
 222 else
 223         echo -e "\t\t SKIPPED - no hot-pluggable memory in offline state"
 224 fi
 225
 226 #
 227 # Test with memory notifier error injection
 228 #
 229
 230 DEBUGFS=`mount -t debugfs | head -1 | awk '{ print $3 }'`
 231 NOTIFIER_ERR_INJECT_DIR=$DEBUGFS/notifier-error-inject/memory
 232
 233 prerequisite_extra()
 234 {
 235         msg="skip extra tests:"
 236
 237         /sbin/modprobe -q -r memory-notifier-error-inject
 238         /sbin/modprobe -q memory-notifier-error-inject priority=$priority
 239
 240         if [ ! -d "$DEBUGFS" ]; then
 241                 echo $msg debugfs is not mounted >&2
 242                 exit $retval
 243         fi
 244
 245         if [ ! -d $NOTIFIER_ERR_INJECT_DIR ]; then
 246                 echo $msg memory-notifier-error-inject module is not available >&2
 247                 exit $retval
 248         fi
 249 }
 250
 251 echo -e "\t Test with memory notifier error injection"
 252 prerequisite_extra
 253
 254 #
 255 # Offline $ratio percent of hot-pluggable memory
 256 #
 257 echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_OFFLINE/error
 258 for memory in `hotpluggable_online_memory`; do
 259         if [ $((RANDOM % 100)) -lt $ratio ]; then
 260                 offline_memory_expect_success $memory
 261         fi
 262 done
 263
 264 #
 265 # Test memory hot-add error handling (offline => online)
 266 #
 267 echo $error > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_ONLINE/error
 268 for memory in `hotpluggable_offline_memory`; do
 269         online_memory_expect_fail $memory
 270 done
 271
 272 #
 273 # Online all hot-pluggable memory
 274 #
 275 echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_ONLINE/error
 276 for memory in `hotpluggable_offline_memory`; do
 277         online_memory_expect_success $memory
 278 done
 279
 280 #
 281 # Test memory hot-remove error handling (online => offline)
 282 #
 283 echo $error > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_OFFLINE/error
 284 for memory in `hotpluggable_online_memory`; do
 285         offline_memory_expect_fail $memory
 286 done
 287
 288 echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_OFFLINE/error
 289 /sbin/modprobe -q -r memory-notifier-error-inject
 290
 291 exit $retval