1 files changed, 230 insertions, 0 deletions

diff --git a/tools/testing/selftests/memory-hotplug/on-off-test.sh b/tools/testing/selftests/memory-hotplug/on-off-test.sh
new file mode 100644
index 00000000000..a2816f63154
--- /dev/null
+++ b/tools/testing/selftests/memory-hotplug/on-off-test.sh
@@ -0,0 +1,230 @@
+#!/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