313 lines
6.4 KiB
Bash
313 lines
6.4 KiB
Bash
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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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SYSFS=
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# Kselftest framework requirement - SKIP code is 4.
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ksft_skip=4
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prerequisite()
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{
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msg="skip all tests:"
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if [ $UID != 0 ]; then
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echo $msg must be run as root >&2
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exit $ksft_skip
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fi
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SYSFS=`mount -t sysfs | head -1 | awk '{ print $3 }'`
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if [ ! -d "$SYSFS" ]; then
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echo $msg sysfs is not mounted >&2
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exit $ksft_skip
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fi
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if ! ls $SYSFS/devices/system/memory/memory* > /dev/null 2>&1; then
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echo $msg memory hotplug is not supported >&2
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exit $ksft_skip
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fi
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if ! grep -q 1 $SYSFS/devices/system/memory/memory*/removable; then
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echo $msg no hot-pluggable memory >&2
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exit $ksft_skip
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fi
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}
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#
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# list all hot-pluggable memory
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#
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hotpluggable_memory()
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{
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local state=${1:-.\*}
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for memory in $SYSFS/devices/system/memory/memory*; do
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if grep -q 1 $memory/removable &&
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grep -q $state $memory/state; then
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echo ${memory##/*/memory}
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fi
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done
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}
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hotpluggable_offline_memory()
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{
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hotpluggable_memory offline
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}
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hotpluggable_online_memory()
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{
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hotpluggable_memory online
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}
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memory_is_online()
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{
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grep -q online $SYSFS/devices/system/memory/memory$1/state
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}
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memory_is_offline()
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{
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grep -q offline $SYSFS/devices/system/memory/memory$1/state
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}
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online_memory()
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{
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echo online > $SYSFS/devices/system/memory/memory$1/state
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}
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offline_memory()
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{
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echo offline > $SYSFS/devices/system/memory/memory$1/state
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}
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online_memory_expect_success()
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{
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local memory=$1
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if ! online_memory $memory; then
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echo $FUNCNAME $memory: unexpected fail >&2
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return 1
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elif ! memory_is_online $memory; then
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echo $FUNCNAME $memory: unexpected offline >&2
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return 1
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fi
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return 0
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}
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online_memory_expect_fail()
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{
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local memory=$1
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if online_memory $memory 2> /dev/null; then
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echo $FUNCNAME $memory: unexpected success >&2
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return 1
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elif ! memory_is_offline $memory; then
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echo $FUNCNAME $memory: unexpected online >&2
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return 1
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fi
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return 0
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}
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offline_memory_expect_success()
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{
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local memory=$1
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if ! offline_memory $memory; then
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echo $FUNCNAME $memory: unexpected fail >&2
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return 1
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elif ! memory_is_offline $memory; then
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echo $FUNCNAME $memory: unexpected offline >&2
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return 1
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fi
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return 0
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}
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offline_memory_expect_fail()
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{
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local memory=$1
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if offline_memory $memory 2> /dev/null; then
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echo $FUNCNAME $memory: unexpected success >&2
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return 1
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elif ! memory_is_online $memory; then
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echo $FUNCNAME $memory: unexpected offline >&2
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return 1
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fi
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return 0
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}
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online_all_offline_memory()
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{
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for memory in `hotpluggable_offline_memory`; do
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if ! online_memory_expect_success $memory; then
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retval=1
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fi
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done
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}
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error=-12
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priority=0
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# Run with default of ratio=2 for Kselftest run
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ratio=2
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retval=0
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while getopts e:hp:r: opt; do
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case $opt in
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e)
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error=$OPTARG
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;;
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h)
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echo "Usage $0 [ -e errno ] [ -p notifier-priority ] [ -r percent-of-memory-to-offline ]"
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exit
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;;
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p)
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priority=$OPTARG
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;;
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r)
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ratio=$OPTARG
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if [ "$ratio" -gt 100 ] || [ "$ratio" -lt 0 ]; then
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echo "The percentage should be an integer within 0~100 range"
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exit 1
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fi
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;;
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esac
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done
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if ! [ "$error" -ge -4095 -a "$error" -lt 0 ]; then
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echo "error code must be -4095 <= errno < 0" >&2
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exit 1
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fi
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prerequisite
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echo "Test scope: $ratio% hotplug memory"
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#
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# Online all hot-pluggable memory
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#
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hotpluggable_num=`hotpluggable_offline_memory | wc -l`
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echo -e "\t online all hot-pluggable memory in offline state:"
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if [ "$hotpluggable_num" -gt 0 ]; then
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for memory in `hotpluggable_offline_memory`; do
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echo "offline->online memory$memory"
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if ! online_memory_expect_success $memory; then
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retval=1
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fi
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done
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else
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echo -e "\t\t SKIPPED - no hot-pluggable memory in offline state"
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fi
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#
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# Offline $ratio percent of hot-pluggable memory
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#
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hotpluggable_num=`hotpluggable_online_memory | wc -l`
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target=`echo "a=$hotpluggable_num*$ratio; if ( a%100 ) a/100+1 else a/100" | bc`
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echo -e "\t offline $ratio% hot-pluggable memory in online state"
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echo -e "\t trying to offline $target out of $hotpluggable_num memory block(s):"
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for memory in `hotpluggable_online_memory`; do
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if [ "$target" -gt 0 ]; then
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echo "online->offline memory$memory"
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if offline_memory_expect_success $memory &>/dev/null; then
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target=$(($target - 1))
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echo "-> Success"
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else
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echo "-> Failure"
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fi
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fi
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done
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if [ "$target" -gt 0 ]; then
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retval=1
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echo -e "\t\t FAILED - unable to offline some memory blocks, device busy?"
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fi
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#
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# Online all hot-pluggable memory again
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#
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hotpluggable_num=`hotpluggable_offline_memory | wc -l`
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echo -e "\t online all hot-pluggable memory in offline state:"
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if [ "$hotpluggable_num" -gt 0 ]; then
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for memory in `hotpluggable_offline_memory`; do
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echo "offline->online memory$memory"
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if ! online_memory_expect_success $memory; then
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retval=1
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fi
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done
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else
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echo -e "\t\t SKIPPED - no hot-pluggable memory in offline state"
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fi
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#
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# Test with memory notifier error injection
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#
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DEBUGFS=`mount -t debugfs | head -1 | awk '{ print $3 }'`
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NOTIFIER_ERR_INJECT_DIR=$DEBUGFS/notifier-error-inject/memory
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prerequisite_extra()
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{
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msg="skip extra tests:"
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/sbin/modprobe -q -r memory-notifier-error-inject
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/sbin/modprobe -q memory-notifier-error-inject priority=$priority
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if [ ! -d "$DEBUGFS" ]; then
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echo $msg debugfs is not mounted >&2
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exit $retval
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fi
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if [ ! -d $NOTIFIER_ERR_INJECT_DIR ]; then
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echo $msg memory-notifier-error-inject module is not available >&2
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exit $retval
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fi
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}
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echo -e "\t Test with memory notifier error injection"
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prerequisite_extra
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#
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# Offline $ratio percent of hot-pluggable memory
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#
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echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_OFFLINE/error
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for memory in `hotpluggable_online_memory`; do
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if [ $((RANDOM % 100)) -lt $ratio ]; then
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offline_memory_expect_success $memory &>/dev/null
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fi
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done
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#
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# Test memory hot-add error handling (offline => online)
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#
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echo $error > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_ONLINE/error
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for memory in `hotpluggable_offline_memory`; do
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if ! online_memory_expect_fail $memory; then
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retval=1
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fi
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done
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#
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# Online all hot-pluggable memory
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#
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echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_ONLINE/error
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online_all_offline_memory
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#
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# Test memory hot-remove error handling (online => offline)
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#
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echo $error > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_OFFLINE/error
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for memory in `hotpluggable_online_memory`; do
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if [ $((RANDOM % 100)) -lt $ratio ]; then
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if ! offline_memory_expect_fail $memory; then
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retval=1
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fi
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fi
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done
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echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_OFFLINE/error
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/sbin/modprobe -q -r memory-notifier-error-inject
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#
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# Restore memory before exit
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#
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online_all_offline_memory
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exit $retval
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