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// SPDX-License-Identifier: GPL-2.0
#include <linux/reboot.h>
#include <kunit/test.h>
#include <linux/glob.h>
#include <linux/moduleparam.h>
/*
* These symbols point to the .kunit_test_suites section and are defined in
* include/asm-generic/vmlinux.lds.h, and consequently must be extern.
*/
extern struct kunit_suite * const __kunit_suites_start[];
extern struct kunit_suite * const __kunit_suites_end[];
#if IS_BUILTIN(CONFIG_KUNIT)
static char *filter_glob_param;
static char *action_param;
module_param_named(filter_glob, filter_glob_param, charp, 0);
MODULE_PARM_DESC(filter_glob,
"Filter which KUnit test suites/tests run at boot-time, e.g. list* or list*.*del_test");
module_param_named(action, action_param, charp, 0);
MODULE_PARM_DESC(action,
"Changes KUnit executor behavior, valid values are:\n"
"<none>: run the tests like normal\n"
"'list' to list test names instead of running them.\n");
/* glob_match() needs NULL terminated strings, so we need a copy of filter_glob_param. */
struct kunit_test_filter {
char *suite_glob;
char *test_glob;
};
/* Split "suite_glob.test_glob" into two. Assumes filter_glob is not empty. */
static void kunit_parse_filter_glob(struct kunit_test_filter *parsed,
const char *filter_glob)
{
const int len = strlen(filter_glob);
const char *period = strchr(filter_glob, '.');
if (!period) {
parsed->suite_glob = kzalloc(len + 1, GFP_KERNEL);
parsed->test_glob = NULL;
strcpy(parsed->suite_glob, filter_glob);
return;
}
parsed->suite_glob = kzalloc(period - filter_glob + 1, GFP_KERNEL);
parsed->test_glob = kzalloc(len - (period - filter_glob) + 1, GFP_KERNEL);
strncpy(parsed->suite_glob, filter_glob, period - filter_glob);
strncpy(parsed->test_glob, period + 1, len - (period - filter_glob));
}
/* Create a copy of suite with only tests that match test_glob. */
static struct kunit_suite *
kunit_filter_tests(const struct kunit_suite *const suite, const char *test_glob)
{
int n = 0;
struct kunit_case *filtered, *test_case;
struct kunit_suite *copy;
kunit_suite_for_each_test_case(suite, test_case) {
if (!test_glob || glob_match(test_glob, test_case->name))
++n;
}
if (n == 0)
return NULL;
copy = kmemdup(suite, sizeof(*copy), GFP_KERNEL);
if (!copy)
return ERR_PTR(-ENOMEM);
filtered = kcalloc(n + 1, sizeof(*filtered), GFP_KERNEL);
if (!filtered) {
kfree(copy);
return ERR_PTR(-ENOMEM);
}
n = 0;
kunit_suite_for_each_test_case(suite, test_case) {
if (!test_glob || glob_match(test_glob, test_case->name))
filtered[n++] = *test_case;
}
copy->test_cases = filtered;
return copy;
}
static char *kunit_shutdown;
core_param(kunit_shutdown, kunit_shutdown, charp, 0644);
/* Stores an array of suites, end points one past the end */
struct suite_set {
struct kunit_suite * const *start;
struct kunit_suite * const *end;
};
static void kunit_free_suite_set(struct suite_set suite_set)
{
struct kunit_suite * const *suites;
for (suites = suite_set.start; suites < suite_set.end; suites++) {
kfree((*suites)->test_cases);
kfree(*suites);
}
kfree(suite_set.start);
}
static struct suite_set kunit_filter_suites(const struct suite_set *suite_set,
const char *filter_glob,
int *err)
{
int i;
struct kunit_suite **copy, *filtered_suite;
struct suite_set filtered;
struct kunit_test_filter filter;
const size_t max = suite_set->end - suite_set->start;
copy = kmalloc_array(max, sizeof(*filtered.start), GFP_KERNEL);
filtered.start = copy;
if (!copy) { /* won't be able to run anything, return an empty set */
filtered.end = copy;
return filtered;
}
kunit_parse_filter_glob(&filter, filter_glob);
for (i = 0; &suite_set->start[i] != suite_set->end; i++) {
if (!glob_match(filter.suite_glob, suite_set->start[i]->name))
continue;
filtered_suite = kunit_filter_tests(suite_set->start[i], filter.test_glob);
if (IS_ERR(filtered_suite)) {
*err = PTR_ERR(filtered_suite);
return filtered;
}
if (!filtered_suite)
continue;
*copy++ = filtered_suite;
}
filtered.end = copy;
kfree(filter.suite_glob);
kfree(filter.test_glob);
return filtered;
}
static void kunit_handle_shutdown(void)
{
if (!kunit_shutdown)
return;
if (!strcmp(kunit_shutdown, "poweroff"))
kernel_power_off();
else if (!strcmp(kunit_shutdown, "halt"))
kernel_halt();
else if (!strcmp(kunit_shutdown, "reboot"))
kernel_restart(NULL);
}
static void kunit_exec_run_tests(struct suite_set *suite_set)
{
size_t num_suites = suite_set->end - suite_set->start;
pr_info("KTAP version 1\n");
pr_info("1..%zu\n", num_suites);
__kunit_test_suites_init(suite_set->start, num_suites);
}
static void kunit_exec_list_tests(struct suite_set *suite_set)
{
struct kunit_suite * const *suites;
struct kunit_case *test_case;
/* Hack: print a ktap header so kunit.py can find the start of KUnit output. */
pr_info("KTAP version 1\n");
for (suites = suite_set->start; suites < suite_set->end; suites++)
kunit_suite_for_each_test_case((*suites), test_case) {
pr_info("%s.%s\n", (*suites)->name, test_case->name);
}
}
int kunit_run_all_tests(void)
{
struct suite_set suite_set = {__kunit_suites_start, __kunit_suites_end};
int err = 0;
if (!kunit_enabled()) {
pr_info("kunit: disabled\n");
goto out;
}
if (filter_glob_param) {
suite_set = kunit_filter_suites(&suite_set, filter_glob_param, &err);
if (err) {
pr_err("kunit executor: error filtering suites: %d\n", err);
goto out;
}
}
if (!action_param)
kunit_exec_run_tests(&suite_set);
else if (strcmp(action_param, "list") == 0)
kunit_exec_list_tests(&suite_set);
else
pr_err("kunit executor: unknown action '%s'\n", action_param);
if (filter_glob_param) { /* a copy was made of each suite */
kunit_free_suite_set(suite_set);
}
out:
kunit_handle_shutdown();
return err;
}
#if IS_BUILTIN(CONFIG_KUNIT_TEST)
#include "executor_test.c"
#endif
#endif /* IS_BUILTIN(CONFIG_KUNIT) */
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