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-rw-r--r--tools/testing/fault-injection/failcmd.sh219
-rwxr-xr-xtools/testing/ktest/ktest.pl167
-rw-r--r--tools/testing/ktest/sample.conf52
-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
8 files changed, 898 insertions, 5 deletions
diff --git a/tools/testing/fault-injection/failcmd.sh b/tools/testing/fault-injection/failcmd.sh
new file mode 100644
index 00000000000..78a9ed7fecd
--- /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 "$1" ] && 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/ktest/ktest.pl b/tools/testing/ktest/ktest.pl
index 292b13ad03f..52b7959cd51 100755
--- a/tools/testing/ktest/ktest.pl
+++ b/tools/testing/ktest/ktest.pl
@@ -52,6 +52,7 @@ my %default = (
"STOP_AFTER_SUCCESS" => 10,
"STOP_AFTER_FAILURE" => 60,
"STOP_TEST_AFTER" => 600,
+ "MAX_MONITOR_WAIT" => 1800,
# required, and we will ask users if they don't have them but we keep the default
# value something that is common.
@@ -77,6 +78,11 @@ my $output_config;
my $test_type;
my $build_type;
my $build_options;
+my $final_post_ktest;
+my $pre_ktest;
+my $post_ktest;
+my $pre_test;
+my $post_test;
my $pre_build;
my $post_build;
my $pre_build_die;
@@ -93,6 +99,7 @@ my $reboot_on_success;
my $die_on_failure;
my $powercycle_after_reboot;
my $poweroff_after_halt;
+my $max_monitor_wait;
my $ssh_exec;
my $scp_to_target;
my $scp_to_target_install;
@@ -101,6 +108,7 @@ my $grub_menu;
my $grub_number;
my $target;
my $make;
+my $pre_install;
my $post_install;
my $no_install;
my $noclean;
@@ -167,6 +175,7 @@ my $bisect_check;
my $config_bisect;
my $config_bisect_type;
+my $config_bisect_check;
my $patchcheck_type;
my $patchcheck_start;
@@ -182,6 +191,9 @@ my $newconfig = 0;
my %entered_configs;
my %config_help;
my %variable;
+
+# force_config is the list of configs that we force enabled (or disabled)
+# in a .config file. The MIN_CONFIG and ADD_CONFIG configs.
my %force_config;
# do not force reboots on config problems
@@ -197,6 +209,10 @@ my %option_map = (
"OUTPUT_DIR" => \$outputdir,
"BUILD_DIR" => \$builddir,
"TEST_TYPE" => \$test_type,
+ "PRE_KTEST" => \$pre_ktest,
+ "POST_KTEST" => \$post_ktest,
+ "PRE_TEST" => \$pre_test,
+ "POST_TEST" => \$post_test,
"BUILD_TYPE" => \$build_type,
"BUILD_OPTIONS" => \$build_options,
"PRE_BUILD" => \$pre_build,
@@ -216,6 +232,7 @@ my %option_map = (
"ADD_CONFIG" => \$addconfig,
"REBOOT_TYPE" => \$reboot_type,
"GRUB_MENU" => \$grub_menu,
+ "PRE_INSTALL" => \$pre_install,
"POST_INSTALL" => \$post_install,
"NO_INSTALL" => \$no_install,
"REBOOT_SCRIPT" => \$reboot_script,
@@ -228,6 +245,7 @@ my %option_map = (
"POWER_OFF" => \$power_off,
"POWERCYCLE_AFTER_REBOOT" => \$powercycle_after_reboot,
"POWEROFF_AFTER_HALT" => \$poweroff_after_halt,
+ "MAX_MONITOR_WAIT" => \$max_monitor_wait,
"SLEEP_TIME" => \$sleep_time,
"BISECT_SLEEP_TIME" => \$bisect_sleep_time,
"PATCHCHECK_SLEEP_TIME" => \$patchcheck_sleep_time,
@@ -272,6 +290,7 @@ my %option_map = (
"CONFIG_BISECT" => \$config_bisect,
"CONFIG_BISECT_TYPE" => \$config_bisect_type,
+ "CONFIG_BISECT_CHECK" => \$config_bisect_check,
"PATCHCHECK_TYPE" => \$patchcheck_type,
"PATCHCHECK_START" => \$patchcheck_start,
@@ -604,6 +623,10 @@ sub process_compare {
return $lval eq $rval;
} elsif ($cmp eq "!=") {
return $lval ne $rval;
+ } elsif ($cmp eq "=~") {
+ return $lval =~ m/$rval/;
+ } elsif ($cmp eq "!~") {
+ return $lval !~ m/$rval/;
}
my $statement = "$lval $cmp $rval";
@@ -659,7 +682,7 @@ sub process_expression {
}
}
- if ($val =~ /(.*)(==|\!=|>=|<=|>|<)(.*)/) {
+ if ($val =~ /(.*)(==|\!=|>=|<=|>|<|=~|\!~)(.*)/) {
my $ret = process_compare($1, $2, $3);
if ($ret < 0) {
die "$name: $.: Unable to process comparison\n";
@@ -1117,7 +1140,11 @@ sub reboot {
}
if (defined($time)) {
- wait_for_monitor($time, $reboot_success_line);
+ if (wait_for_monitor($time, $reboot_success_line)) {
+ # reboot got stuck?
+ doprint "Reboot did not finish. Forcing power cycle\n";
+ run_command "$power_cycle";
+ }
end_monitor;
}
}
@@ -1212,6 +1239,11 @@ sub wait_for_monitor {
my $full_line = "";
my $line;
my $booted = 0;
+ my $start_time = time;
+ my $skip_call_trace = 0;
+ my $bug = 0;
+ my $bug_ignored = 0;
+ my $now;
doprint "** Wait for monitor to settle down **\n";
@@ -1227,11 +1259,39 @@ sub wait_for_monitor {
$booted = 1;
}
+ if ($full_line =~ /\[ backtrace testing \]/) {
+ $skip_call_trace = 1;
+ }
+
+ if ($full_line =~ /call trace:/i) {
+ if (!$bug && !$skip_call_trace) {
+ if ($ignore_errors) {
+ $bug_ignored = 1;
+ } else {
+ $bug = 1;
+ }
+ }
+ }
+
+ if ($full_line =~ /\[ end of backtrace testing \]/) {
+ $skip_call_trace = 0;
+ }
+
+ if ($full_line =~ /Kernel panic -/) {
+ $bug = 1;
+ }
+
if ($line =~ /\n/) {
$full_line = "";
}
+ $now = time;
+ if ($now - $start_time >= $max_monitor_wait) {
+ doprint "Exiting monitor flush due to hitting MAX_MONITOR_WAIT\n";
+ return 1;
+ }
}
print "** Monitor flushed **\n";
+ return $bug;
}
sub save_logs {
@@ -1273,6 +1333,10 @@ sub save_logs {
sub fail {
+ if (defined($post_test)) {
+ run_command $post_test;
+ }
+
if ($die_on_failure) {
dodie @_;
}
@@ -1656,6 +1720,12 @@ sub install {
return if ($no_install);
+ if (defined($pre_install)) {
+ my $cp_pre_install = eval_kernel_version $pre_install;
+ run_command "$cp_pre_install" or
+ dodie "Failed to run pre install";
+ }
+
my $cp_target = eval_kernel_version $target_image;
run_scp_install "$outputdir/$build_target", "$cp_target" or
@@ -1814,6 +1884,7 @@ sub make_oldconfig {
sub load_force_config {
my ($config) = @_;
+ doprint "Loading force configs from $config\n";
open(IN, $config) or
dodie "failed to read $config";
while (<IN>) {
@@ -1937,6 +2008,10 @@ sub halt {
sub success {
my ($i) = @_;
+ if (defined($post_test)) {
+ run_command $post_test;
+ }
+
$successes++;
my $name = "";
@@ -2003,6 +2078,7 @@ sub do_run_test {
my $line;
my $full_line;
my $bug = 0;
+ my $bug_ignored = 0;
wait_for_monitor 1;
@@ -2027,7 +2103,11 @@ sub do_run_test {
doprint $line;
if ($full_line =~ /call trace:/i) {
- $bug = 1;
+ if ($ignore_errors) {
+ $bug_ignored = 1;
+ } else {
+ $bug = 1;
+ }
}
if ($full_line =~ /Kernel panic -/) {
@@ -2040,6 +2120,10 @@ sub do_run_test {
}
} while (!$child_done && !$bug);
+ if (!$bug && $bug_ignored) {
+ doprint "WARNING: Call Trace detected but ignored due to IGNORE_ERRORS=1\n";
+ }
+
if ($bug) {
my $failure_start = time;
my $now;
@@ -2362,9 +2446,24 @@ sub bisect {
success $i;
}
+# config_ignore holds the configs that were set (or unset) for
+# a good config and we will ignore these configs for the rest
+# of a config bisect. These configs stay as they were.
my %config_ignore;
+
+# config_set holds what all configs were set as.
my %config_set;
+# config_off holds the set of configs that the bad config had disabled.
+# We need to record them and set them in the .config when running
+# oldnoconfig, because oldnoconfig does not turn off new symbols, but
+# instead just keeps the defaults.
+my %config_off;
+
+# config_off_tmp holds a set of configs to turn off for now
+my @config_off_tmp;
+
+# config_list is the set of configs that are being tested
my %config_list;
my %null_config;
@@ -2443,12 +2542,21 @@ sub create_config {
}
}
+ # turn off configs to keep off
+ foreach my $config (keys %config_off) {
+ print OUT "# $config is not set\n";
+ }
+
+ # turn off configs that should be off for now
+ foreach my $config (@config_off_tmp) {
+ print OUT "# $config is not set\n";
+ }
+
foreach my $config (keys %config_ignore) {
print OUT "$config_ignore{$config}\n";
}
close(OUT);
-# exit;
make_oldconfig;
}
@@ -2525,6 +2633,13 @@ sub run_config_bisect {
do {
my @tophalf = @start_list[0 .. $half];
+ # keep the bottom half off
+ if ($half < $#start_list) {
+ @config_off_tmp = @start_list[$half + 1 .. $#start_list];
+ } else {
+ @config_off_tmp = ();
+ }
+
create_config @tophalf;
read_current_config \%current_config;
@@ -2541,7 +2656,11 @@ sub run_config_bisect {
if (!$found) {
# try the other half
doprint "Top half produced no set configs, trying bottom half\n";
+
+ # keep the top half off
+ @config_off_tmp = @tophalf;
@tophalf = @start_list[$half + 1 .. $#start_list];
+
create_config @tophalf;
read_current_config \%current_config;
foreach my $config (@tophalf) {
@@ -2679,6 +2798,10 @@ sub config_bisect {
$added_configs{$2} = $1;
$config_list{$2} = $1;
}
+ } elsif (/^# ((CONFIG\S*).*)/) {
+ # Keep these configs disabled
+ $config_set{$2} = $1;
+ $config_off{$2} = $1;
}
}
close(IN);
@@ -2701,6 +2824,8 @@ sub config_bisect {
my %config_test;
my $once = 0;
+ @config_off_tmp = ();
+
# Sometimes kconfig does weird things. We must make sure
# that the config we autocreate has everything we need
# to test, otherwise we may miss testing configs, or
@@ -2719,6 +2844,18 @@ sub config_bisect {
}
}
my $ret;
+
+ if (defined($config_bisect_check) && $config_bisect_check) {
+ doprint " Checking to make sure bad config with min config fails\n";
+ create_config keys %config_list;
+ $ret = run_config_bisect_test $config_bisect_type;
+ if ($ret) {
+ doprint " FAILED! Bad config with min config boots fine\n";
+ return -1;
+ }
+ doprint " Bad config with min config fails as expected\n";
+ }
+
do {
$ret = run_config_bisect;
} while (!$ret);
@@ -3510,6 +3647,8 @@ for (my $i = 1; $i <= $opt{"NUM_TESTS"}; $i++) {
$iteration = $i;
+ undef %force_config;
+
my $makecmd = set_test_option("MAKE_CMD", $i);
# Load all the options into their mapped variable names
@@ -3519,6 +3658,18 @@ for (my $i = 1; $i <= $opt{"NUM_TESTS"}; $i++) {
$start_minconfig_defined = 1;
+ # The first test may override the PRE_KTEST option
+ if (defined($pre_ktest) && $i == 1) {
+ doprint "\n";
+ run_command $pre_ktest;
+ }
+
+ # Any test can override the POST_KTEST option
+ # The last test takes precedence.
+ if (defined($post_ktest)) {
+ $final_post_ktest = $post_ktest;
+ }
+
if (!defined($start_minconfig)) {
$start_minconfig_defined = 0;
$start_minconfig = $minconfig;
@@ -3573,6 +3724,10 @@ for (my $i = 1; $i <= $opt{"NUM_TESTS"}; $i++) {
doprint "\n\n";
doprint "RUNNING TEST $i of $opt{NUM_TESTS} with option $test_type $run_type$installme\n\n";
+ if (defined($pre_test)) {
+ run_command $pre_test;
+ }
+
unlink $dmesg;
unlink $buildlog;
unlink $testlog;
@@ -3638,6 +3793,10 @@ for (my $i = 1; $i <= $opt{"NUM_TESTS"}; $i++) {
success $i;
}
+if (defined($final_post_ktest)) {
+ run_command $final_post_ktest;
+}
+
if ($opt{"POWEROFF_ON_SUCCESS"}) {
halt;
} elsif ($opt{"REBOOT_ON_SUCCESS"} && !do_not_reboot && $reboot_success) {
diff --git a/tools/testing/ktest/sample.conf b/tools/testing/ktest/sample.conf
index cf362b3d1ec..de28a0a3b8f 100644
--- a/tools/testing/ktest/sample.conf
+++ b/tools/testing/ktest/sample.conf
@@ -376,6 +376,24 @@
# DEFAULTS
# DEFAULTS SKIP
+# If you want to execute some command before the first test runs
+# you can set this option. Note, it can be set as a default option
+# or an option in the first test case. All other test cases will
+# ignore it. If both the default and first test have this option
+# set, then the first test will take precedence.
+#
+# default (undefined)
+#PRE_KTEST = ${SSH} ~/set_up_test
+
+# If you want to execute some command after all the tests have
+# completed, you can set this option. Note, it can be set as a
+# default or any test case can override it. If multiple test cases
+# set this option, then the last test case that set it will take
+# precedence
+#
+# default (undefined)
+#POST_KTEST = ${SSH} ~/dismantle_test
+
# The default test type (default test)
# The test types may be:
# build - only build the kernel, do nothing else
@@ -408,6 +426,14 @@
# (default "")
#BUILD_OPTIONS = -j20
+# If you need to do some special handling before installing
+# you can add a script with this option.
+# The environment variable KERNEL_VERSION will be set to the
+# kernel version that is used.
+#
+# default (undefined)
+#PRE_INSTALL = ssh user@target rm -rf '/lib/modules/*-test*'
+
# If you need an initrd, you can add a script or code here to install
# it. The environment variable KERNEL_VERSION will be set to the
# kernel version that is used. Remember to add the initrd line
@@ -426,6 +452,18 @@
# (default 0)
#NO_INSTALL = 1
+# If there is a command that you want to run before the individual test
+# case executes, then you can set this option
+#
+# default (undefined)
+#PRE_TEST = ${SSH} reboot_to_special_kernel
+
+# If there is a command you want to run after the individual test case
+# completes, then you can set this option.
+#
+# default (undefined)
+#POST_TEST = cd ${BUILD_DIR}; git reset --hard
+
# If there is a script that you require to run before the build is done
# you can specify it with PRE_BUILD.
#
@@ -657,6 +695,14 @@
# (default 60)
#BISECT_SLEEP_TIME = 60
+# The max wait time (in seconds) for waiting for the console to finish.
+# If for some reason, the console is outputting content without
+# ever finishing, this will cause ktest to get stuck. This
+# option is the max time ktest will wait for the monitor (console)
+# to settle down before continuing.
+# (default 1800)
+#MAX_MONITOR_WAIT
+
# The time in between patch checks to sleep (in seconds)
# (default 60)
#PATCHCHECK_SLEEP_TIME = 60
@@ -1039,6 +1085,12 @@
# can specify it with CONFIG_BISECT_GOOD. Otherwise
# the MIN_CONFIG is the base.
#
+# CONFIG_BISECT_CHECK (optional)
+# Set this to 1 if you want to confirm that the config ktest
+# generates (the bad config with the min config) is still bad.
+# It may be that the min config fixes what broke the bad config
+# and the test will not return a result.
+#
# Example:
# TEST_START
# TEST_TYPE = config_bisect
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index a4162e15c25..85baf11e2ac 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 00000000000..7c9c20ff578
--- /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 00000000000..bdde7cf428b
--- /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 00000000000..7c9c20ff578
--- /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 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
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 19:01:17 +0000