Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / tools / testing / selftests / memory-hotplug / mem-on-off-test.sh

diff --git a/kernel/tools/testing/selftests/memory-hotplug/mem-on-off-test.sh b/kernel/tools/testing/selftests/memory-hotplug/mem-on-off-test.sh
new file mode 100755 (executable)
index 0000000..6cddde0
--- /dev/null
+++ b/kernel/tools/testing/selftests/memory-hotplug/mem-on-off-test.sh
@@ -0,0 +1,238 @@
+#!/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
+
+echo "Test scope: $ratio% hotplug memory"
+echo -e "\t online all hotplug memory in offline state"
+echo -e "\t offline $ratio% hotplug memory in online state"
+echo -e "\t online all hotplug memory in offline state"
+
+#
+# Online all hot-pluggable memory
+#
+for memory in `hotplaggable_offline_memory`; do
+       echo offline-online $memory
+       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
+               echo online-offline $memory
+               offline_memory_expect_success $memory
+       fi
+done
+
+#
+# Online all hot-pluggable memory again
+#
+for memory in `hotplaggable_offline_memory`; do
+       echo offline-online $memory
+       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