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-rw-r--r--tools/testing/fault-injection/failcmd.sh219
-rw-r--r--tools/testing/selftests/Makefile2
-rw-r--r--tools/testing/selftests/cpu-hotplug/Makefile6
-rw-r--r--tools/testing/selftests/cpu-hotplug/on-off-test.sh221
-rw-r--r--tools/testing/selftests/memory-hotplug/Makefile6
-rw-r--r--tools/testing/selftests/memory-hotplug/on-off-test.sh230
6 files changed, 683 insertions, 1 deletions
diff --git a/tools/testing/fault-injection/failcmd.sh b/tools/testing/fault-injection/failcmd.sh
new file mode 100644
index 000000000000..1776e924b202
--- /dev/null
+++ b/tools/testing/fault-injection/failcmd.sh
@@ -0,0 +1,219 @@
+#!/bin/bash
+#
+# NAME
+# failcmd.sh - run a command with injecting slab/page allocation failures
+#
+# SYNOPSIS
+# failcmd.sh --help
+# failcmd.sh [<options>] command [arguments]
+#
+# DESCRIPTION
+# Run command with injecting slab/page allocation failures by fault
+# injection.
+#
+# NOTE: you need to run this script as root.
+#
+
+usage()
+{
+ cat >&2 <<EOF
+Usage: $0 [options] command [arguments]
+
+OPTIONS
+ -p percent
+ --probability=percent
+ likelihood of failure injection, in percent.
+ Default value is 1
+
+ -t value
+ --times=value
+ specifies how many times failures may happen at most.
+ Default value is 1
+
+ --oom-kill-allocating-task=value
+ set /proc/sys/vm/oom_kill_allocating_task to specified value
+ before running the command.
+ Default value is 1
+
+ -h, --help
+ Display a usage message and exit
+
+ --interval=value, --space=value, --verbose=value, --task-filter=value,
+ --stacktrace-depth=value, --require-start=value, --require-end=value,
+ --reject-start=value, --reject-end=value, --ignore-gfp-wait=value
+ See Documentation/fault-injection/fault-injection.txt for more
+ information
+
+ failslab options:
+ --cache-filter=value
+
+ fail_page_alloc options:
+ --ignore-gfp-highmem=value, --min-order=value
+
+ENVIRONMENT
+ FAILCMD_TYPE
+ The following values for FAILCMD_TYPE are recognized:
+
+ failslab
+ inject slab allocation failures
+ fail_page_alloc
+ inject page allocation failures
+
+ If FAILCMD_TYPE is not defined, then failslab is used.
+EOF
+}
+
+if [ $UID != 0 ]; then
+ echo must be run as root >&2
+ exit 1
+fi
+
+DEBUGFS=`mount -t debugfs | head -1 | awk '{ print $3}'`
+
+if [ ! -d "$DEBUGFS" ]; then
+ echo debugfs is not mounted >&2
+ exit 1
+fi
+
+FAILCMD_TYPE=${FAILCMD_TYPE:-failslab}
+FAULTATTR=$DEBUGFS/$FAILCMD_TYPE
+
+if [ ! -d $FAULTATTR ]; then
+ echo $FAILCMD_TYPE is not available >&2
+ exit 1
+fi
+
+LONGOPTS=probability:,interval:,times:,space:,verbose:,task-filter:
+LONGOPTS=$LONGOPTS,stacktrace-depth:,require-start:,require-end:
+LONGOPTS=$LONGOPTS,reject-start:,reject-end:,oom-kill-allocating-task:,help
+
+if [ $FAILCMD_TYPE = failslab ]; then
+ LONGOPTS=$LONGOPTS,ignore-gfp-wait:,cache-filter:
+elif [ $FAILCMD_TYPE = fail_page_alloc ]; then
+ LONGOPTS=$LONGOPTS,ignore-gfp-wait:,ignore-gfp-highmem:,min-order:
+fi
+
+TEMP=`getopt -o p:i:t:s:v:h --long $LONGOPTS -n 'failcmd.sh' -- "$@"`
+
+if [ $? != 0 ]; then
+ usage
+ exit 1
+fi
+
+eval set -- "$TEMP"
+
+fault_attr_default()
+{
+ echo N > $FAULTATTR/task-filter
+ echo 0 > $FAULTATTR/probability
+ echo 1 > $FAULTATTR/times
+}
+
+fault_attr_default
+
+oom_kill_allocating_task_saved=`cat /proc/sys/vm/oom_kill_allocating_task`
+
+restore_values()
+{
+ fault_attr_default
+ echo $oom_kill_allocating_task_saved \
+ > /proc/sys/vm/oom_kill_allocating_task
+}
+
+#
+# Default options
+#
+declare -i oom_kill_allocating_task=1
+declare task_filter=Y
+declare -i probability=1
+declare -i times=1
+
+while true; do
+ case "$1" in
+ -p|--probability)
+ probability=$2
+ shift 2
+ ;;
+ -i|--interval)
+ echo $2 > $FAULTATTR/interval
+ shift 2
+ ;;
+ -t|--times)
+ times=$2
+ shift 2
+ ;;
+ -s|--space)
+ echo $2 > $FAULTATTR/space
+ shift 2
+ ;;
+ -v|--verbose)
+ echo $2 > $FAULTATTR/verbose
+ shift 2
+ ;;
+ --task-filter)
+ task_filter=$2
+ shift 2
+ ;;
+ --stacktrace-depth)
+ echo $2 > $FAULTATTR/stacktrace-depth
+ shift 2
+ ;;
+ --require-start)
+ echo $2 > $FAULTATTR/require-start
+ shift 2
+ ;;
+ --require-end)
+ echo $2 > $FAULTATTR/require-end
+ shift 2
+ ;;
+ --reject-start)
+ echo $2 > $FAULTATTR/reject-start
+ shift 2
+ ;;
+ --reject-end)
+ echo $2 > $FAULTATTR/reject-end
+ shift 2
+ ;;
+ --oom-kill-allocating-task)
+ oom_kill_allocating_task=$2
+ shift 2
+ ;;
+ --ignore-gfp-wait)
+ echo $2 > $FAULTATTR/ignore-gfp-wait
+ shift 2
+ ;;
+ --cache-filter)
+ echo $2 > $FAULTATTR/cache_filter
+ shift 2
+ ;;
+ --ignore-gfp-highmem)
+ echo $2 > $FAULTATTR/ignore-gfp-highmem
+ shift 2
+ ;;
+ --min-order)
+ echo $2 > $FAULTATTR/min-order
+ shift 2
+ ;;
+ -h|--help)
+ usage
+ exit 0
+ shift
+ ;;
+ --)
+ shift
+ break
+ ;;
+ esac
+done
+
+[ -z "$@" ] && exit 0
+
+echo $oom_kill_allocating_task > /proc/sys/vm/oom_kill_allocating_task
+echo $task_filter > $FAULTATTR/task-filter
+echo $probability > $FAULTATTR/probability
+echo $times > $FAULTATTR/times
+
+trap "restore_values" SIGINT SIGTERM EXIT
+
+cmd="echo 1 > /proc/self/make-it-fail && exec $@"
+bash -c "$cmd"
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index a4162e15c25f..85baf11e2acd 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -1,4 +1,4 @@
-TARGETS = breakpoints kcmp mqueue vm
+TARGETS = breakpoints kcmp mqueue vm cpu-hotplug memory-hotplug
all:
for TARGET in $(TARGETS); do \
diff --git a/tools/testing/selftests/cpu-hotplug/Makefile b/tools/testing/selftests/cpu-hotplug/Makefile
new file mode 100644
index 000000000000..7c9c20ff578a
--- /dev/null
+++ b/tools/testing/selftests/cpu-hotplug/Makefile
@@ -0,0 +1,6 @@
+all:
+
+run_tests:
+ ./on-off-test.sh
+
+clean:
diff --git a/tools/testing/selftests/cpu-hotplug/on-off-test.sh b/tools/testing/selftests/cpu-hotplug/on-off-test.sh
new file mode 100644
index 000000000000..bdde7cf428bb
--- /dev/null
+++ b/tools/testing/selftests/cpu-hotplug/on-off-test.sh
@@ -0,0 +1,221 @@
+#!/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
diff --git a/tools/testing/selftests/memory-hotplug/Makefile b/tools/testing/selftests/memory-hotplug/Makefile
new file mode 100644
index 000000000000..7c9c20ff578a
--- /dev/null
+++ b/tools/testing/selftests/memory-hotplug/Makefile
@@ -0,0 +1,6 @@
+all:
+
+run_tests:
+ ./on-off-test.sh
+
+clean:
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 000000000000..a2816f631542
--- /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
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2024-12-26 07:38:33 +0000