fault-injection: add selftests for cpu and memory hotplug

This adds two selftests

* tools/testing/selftests/cpu-hotplug/on-off-test.sh is testing script
for CPU hotplug

1. Online all hot-pluggable CPUs
2. Offline all hot-pluggable CPUs
3. Online all hot-pluggable CPUs again
4. Exit if cpu-notifier-error-inject.ko is not available
5. Offline all hot-pluggable CPUs in preparation for testing
6. Test CPU hot-add error handling by injecting notifier errors
7. Online all hot-pluggable CPUs in preparation for testing
8. Test CPU hot-remove error handling by injecting notifier errors

* tools/testing/selftests/memory-hotplug/on-off-test.sh is doing the
similar thing for memory hotplug.

1. Online all hot-pluggable memory
2. Offline 10% of hot-pluggable memory
3. Online all hot-pluggable memory again
4. Exit if memory-notifier-error-inject.ko is not available
5. Offline 10% of hot-pluggable memory in preparation for testing
6. Test memory hot-add error handling by injecting notifier errors
7. Online all hot-pluggable memory in preparation for testing
8. Test memory hot-remove error handling by injecting notifier errors

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Suggested-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Greg KH <greg@kroah.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <michael@ellerman.id.au>
Cc: Dave Jones <davej@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Akinobu Mita 2012-07-30 14:43:17 -07:00 committed by Linus Torvalds
parent 08dfb4ddee
commit d89dffa976
5 changed files with 464 additions and 1 deletions

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TARGETS = breakpoints kcmp mqueue vm
TARGETS = breakpoints kcmp mqueue vm cpu-hotplug memory-hotplug
all:
for TARGET in $(TARGETS); do \

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all:
run_tests:
./on-off-test.sh
clean:

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#!/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/cpu/cpu* > /dev/null 2>&1; then
echo $msg cpu hotplug is not supported >&2
exit 0
fi
}
#
# list all hot-pluggable CPUs
#
hotpluggable_cpus()
{
local state=${1:-.\*}
for cpu in $SYSFS/devices/system/cpu/cpu*; do
if [ -f $cpu/online ] && grep -q $state $cpu/online; then
echo ${cpu##/*/cpu}
fi
done
}
hotplaggable_offline_cpus()
{
hotpluggable_cpus 0
}
hotpluggable_online_cpus()
{
hotpluggable_cpus 1
}
cpu_is_online()
{
grep -q 1 $SYSFS/devices/system/cpu/cpu$1/online
}
cpu_is_offline()
{
grep -q 0 $SYSFS/devices/system/cpu/cpu$1/online
}
online_cpu()
{
echo 1 > $SYSFS/devices/system/cpu/cpu$1/online
}
offline_cpu()
{
echo 0 > $SYSFS/devices/system/cpu/cpu$1/online
}
online_cpu_expect_success()
{
local cpu=$1
if ! online_cpu $cpu; then
echo $FUNCNAME $cpu: unexpected fail >&2
elif ! cpu_is_online $cpu; then
echo $FUNCNAME $cpu: unexpected offline >&2
fi
}
online_cpu_expect_fail()
{
local cpu=$1
if online_cpu $cpu 2> /dev/null; then
echo $FUNCNAME $cpu: unexpected success >&2
elif ! cpu_is_offline $cpu; then
echo $FUNCNAME $cpu: unexpected online >&2
fi
}
offline_cpu_expect_success()
{
local cpu=$1
if ! offline_cpu $cpu; then
echo $FUNCNAME $cpu: unexpected fail >&2
elif ! cpu_is_offline $cpu; then
echo $FUNCNAME $cpu: unexpected offline >&2
fi
}
offline_cpu_expect_fail()
{
local cpu=$1
if offline_cpu $cpu 2> /dev/null; then
echo $FUNCNAME $cpu: unexpected success >&2
elif ! cpu_is_online $cpu; then
echo $FUNCNAME $cpu: unexpected offline >&2
fi
}
error=-12
priority=0
while getopts e:hp: opt; do
case $opt in
e)
error=$OPTARG
;;
h)
echo "Usage $0 [ -e errno ] [ -p notifier-priority ]"
exit
;;
p)
priority=$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 CPUs
#
for cpu in `hotplaggable_offline_cpus`; do
online_cpu_expect_success $cpu
done
#
# Offline all hot-pluggable CPUs
#
for cpu in `hotpluggable_online_cpus`; do
offline_cpu_expect_success $cpu
done
#
# Online all hot-pluggable CPUs again
#
for cpu in `hotplaggable_offline_cpus`; do
online_cpu_expect_success $cpu
done
#
# Test with cpu notifier error injection
#
DEBUGFS=`mount -t debugfs | head -1 | awk '{ print $3 }'`
NOTIFIER_ERR_INJECT_DIR=$DEBUGFS/notifier-error-inject/cpu
prerequisite_extra()
{
msg="skip extra tests:"
/sbin/modprobe -q -r cpu-notifier-error-inject
/sbin/modprobe -q cpu-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 cpu-notifier-error-inject module is not available >&2
exit 0
fi
}
prerequisite_extra
#
# Offline all hot-pluggable CPUs
#
echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/CPU_DOWN_PREPARE/error
for cpu in `hotpluggable_online_cpus`; do
offline_cpu_expect_success $cpu
done
#
# Test CPU hot-add error handling (offline => online)
#
echo $error > $NOTIFIER_ERR_INJECT_DIR/actions/CPU_UP_PREPARE/error
for cpu in `hotplaggable_offline_cpus`; do
online_cpu_expect_fail $cpu
done
#
# Online all hot-pluggable CPUs
#
echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/CPU_UP_PREPARE/error
for cpu in `hotplaggable_offline_cpus`; do
online_cpu_expect_success $cpu
done
#
# Test CPU hot-remove error handling (online => offline)
#
echo $error > $NOTIFIER_ERR_INJECT_DIR/actions/CPU_DOWN_PREPARE/error
for cpu in `hotpluggable_online_cpus`; do
offline_cpu_expect_fail $cpu
done
echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/CPU_DOWN_PREPARE/error
/sbin/modprobe -q -r cpu-notifier-error-inject

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all:
run_tests:
./on-off-test.sh
clean:

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#!/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