// SPDX-License-Identifier: GPL-2.0
#include <linux/reboot.h>
#include <kunit/test.h>
#include <kunit/attributes.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[];
extern struct kunit_suite * const __kunit_init_suites_start[];
extern struct kunit_suite * const __kunit_init_suites_end[];
static char *action_param;
module_param_named(action, action_param, charp, 0400);
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"
"'list_attr' to list test names and attributes instead of running them.\n");
const char *kunit_action(void)
{
return action_param;
}
static char *filter_glob_param;
static char *filter_param;
static char *filter_action_param;
module_param_named(filter_glob, filter_glob_param, charp, 0600);
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(filter, filter_param, charp, 0600);
MODULE_PARM_DESC(filter,
"Filter which KUnit test suites/tests run at boot-time using attributes, e.g. speed>slow");
module_param_named(filter_action, filter_action_param, charp, 0600);
MODULE_PARM_DESC(filter_action,
"Changes behavior of filtered tests using attributes, valid values are:\n"
"<none>: do not run filtered tests as normal\n"
"'skip': skip all filtered tests instead so tests will appear in output\n");
const char *kunit_filter_glob(void)
{
return filter_glob_param;
}
char *kunit_filter(void)
{
return filter_param;
}
char *kunit_filter_action(void)
{
return filter_action_param;
}
/* glob_match() needs NULL terminated strings, so we need a copy of filter_glob_param. */
struct kunit_glob_filter {
char *suite_glob;
char *test_glob;
};
/* Split "suite_glob.test_glob" into two. Assumes filter_glob is not empty. */
static int kunit_parse_glob_filter(struct kunit_glob_filter *parsed,
const char *filter_glob)
{
const char *period = strchr(filter_glob, '.');
if (!period) {
parsed->suite_glob = kstrdup(filter_glob, GFP_KERNEL);
if (!parsed->suite_glob)
return -ENOMEM;
parsed->test_glob = NULL;
return 0;
}
parsed->suite_glob = kstrndup(filter_glob, period - filter_glob, GFP_KERNEL);
if (!parsed->suite_glob)
return -ENOMEM;
parsed->test_glob = kstrdup(period + 1, GFP_KERNEL);
if (!parsed->test_glob) {
kfree(parsed->suite_glob);
return -ENOMEM;
}
return 0;
}
/* Create a copy of suite with only tests that match test_glob. */
static struct kunit_suite *
kunit_filter_glob_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;
}
void kunit_free_suite_set(struct kunit_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);
}
/*
* Filter and reallocate test suites. Must return the filtered test suites set
* allocated at a valid virtual address or NULL in case of error.
*/
struct kunit_suite_set
kunit_filter_suites(const struct kunit_suite_set *suite_set,
const char *filter_glob,
char *filters,
char *filter_action,
int *err)
{
int i, j, k;
int filter_count = 0;
struct kunit_suite **copy, **copy_start, *filtered_suite, *new_filtered_suite;
struct kunit_suite_set filtered = {NULL, NULL};
struct kunit_glob_filter parsed_glob;
struct kunit_attr_filter *parsed_filters = NULL;
struct kunit_suite * const *suites;
const size_t max = suite_set->end - suite_set->start;
copy = kcalloc(max, sizeof(*filtered.start), GFP_KERNEL);
if (!copy) { /* won't be able to run anything, return an empty set */
return filtered;
}
copy_start = copy;
if (filter_glob) {
*err = kunit_parse_glob_filter(&parsed_glob, filter_glob);
if (*err)
goto free_copy;
}
/* Parse attribute filters */
if (filters) {
filter_count = kunit_get_filter_count(filters);
parsed_filters = kcalloc(filter_count, sizeof(*parsed_filters), GFP_KERNEL);
if (!parsed_filters) {
*err = -ENOMEM;
goto free_parsed_glob;
}
for (j = 0; j < filter_count; j++)
parsed_filters[j] = kunit_next_attr_filter(&filters, err);
if (*err)
goto free_parsed_filters;
}
for (i = 0; &suite_set->start[i] != suite_set->end; i++) {
filtered_suite = suite_set->start[i];
if (filter_glob) {
if (!glob_match(parsed_glob.suite_glob, filtered_suite->name))
continue;
filtered_suite = kunit_filter_glob_tests(filtered_suite,
parsed_glob.test_glob);
if (IS_ERR(filtered_suite)) {
*err = PTR_ERR(filtered_suite);
goto free_filtered_suite;
}
}
if (filter_count > 0 && parsed_filters != NULL) {
for (k = 0; k < filter_count; k++) {
new_filtered_suite = kunit_filter_attr_tests(filtered_suite,
parsed_filters[k], filter_action, err);
/* Free previous copy of suite */
if (k > 0 || filter_glob) {
kfree(filtered_suite->test_cases);
kfree(filtered_suite);
}
filtered_suite = new_filtered_suite;
if (*err)
goto free_filtered_suite;
if (IS_ERR(filtered_suite)) {
*err = PTR_ERR(filtered_suite);
goto free_filtered_suite;
}
if (!filtered_suite)
break;
}
}
if (!filtered_suite)
continue;
*copy++ = filtered_suite;
}
filtered.start = copy_start;
filtered.end = copy;
free_filtered_suite:
if (*err) {
for (suites = copy_start; suites < copy; suites++) {
kfree((*suites)->test_cases);
kfree(*suites);
}
}
free_parsed_filters:
if (filter_count)
kfree(parsed_filters);
free_parsed_glob:
if (filter_glob) {
kfree(parsed_glob.suite_glob);
kfree(parsed_glob.test_glob);
}
free_copy:
if (*err)
kfree(copy_start);
return filtered;
}
void kunit_exec_run_tests(struct kunit_suite_set *suite_set, bool builtin)
{
size_t num_suites = suite_set->end - suite_set->start;
if (builtin || num_suites) {
pr_info("KTAP version 1\n");
pr_info("1..%zu\n", num_suites);
}
__kunit_test_suites_init(suite_set->start, num_suites);
}
void kunit_exec_list_tests(struct kunit_suite_set *suite_set, bool include_attr)
{
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++) {
/* Print suite name and suite attributes */
pr_info("%s\n", (*suites)->name);
if (include_attr)
kunit_print_attr((void *)(*suites), false, 0);
/* Print test case name and attributes in suite */
kunit_suite_for_each_test_case((*suites), test_case) {
pr_info("%s.%s\n", (*suites)->name, test_case->name);
if (include_attr)
kunit_print_attr((void *)test_case, true, 0);
}
}
}
struct kunit_suite_set kunit_merge_suite_sets(struct kunit_suite_set init_suite_set,
struct kunit_suite_set suite_set)
{
struct kunit_suite_set total_suite_set = {NULL, NULL};
struct kunit_suite **total_suite_start = NULL;
size_t init_num_suites, num_suites, suite_size;
int i = 0;
init_num_suites = init_suite_set.end - init_suite_set.start;
num_suites = suite_set.end - suite_set.start;
suite_size = sizeof(suite_set.start);
/* Allocate memory for array of all kunit suites */
total_suite_start = kmalloc_array(init_num_suites + num_suites, suite_size, GFP_KERNEL);
if (!total_suite_start)
return total_suite_set;
/* Append and mark init suites and then append all other kunit suites */
memcpy(total_suite_start, init_suite_set.start, init_num_suites * suite_size);
for (i = 0; i < init_num_suites; i++)
total_suite_start[i]->is_init = true;
memcpy(total_suite_start + init_num_suites, suite_set.start, num_suites * suite_size);
/* Set kunit suite set start and end */
total_suite_set.start = total_suite_start;
total_suite_set.end = total_suite_start + (init_num_suites + num_suites);
return total_suite_set;
}
#if IS_BUILTIN(CONFIG_KUNIT)
static char *kunit_shutdown;
core_param(kunit_shutdown, kunit_shutdown, charp, 0644);
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);
}
int kunit_run_all_tests(void)
{
struct kunit_suite_set suite_set = {NULL, NULL};
struct kunit_suite_set filtered_suite_set = {NULL, NULL};
struct kunit_suite_set init_suite_set = {
__kunit_init_suites_start, __kunit_init_suites_end,
};
struct kunit_suite_set normal_suite_set = {
__kunit_suites_start, __kunit_suites_end,
};
size_t init_num_suites = init_suite_set.end - init_suite_set.start;
int err = 0;
if (init_num_suites > 0) {
suite_set = kunit_merge_suite_sets(init_suite_set, normal_suite_set);
if (!suite_set.start)
goto out;
} else
suite_set = normal_suite_set;
if (!kunit_enabled()) {
pr_info("kunit: disabled\n");
goto free_out;
}
if (filter_glob_param || filter_param) {
filtered_suite_set = kunit_filter_suites(&suite_set, filter_glob_param,
filter_param, filter_action_param, &err);
/* Free original suite set before using filtered suite set */
if (init_num_suites > 0)
kfree(suite_set.start);
suite_set = filtered_suite_set;
if (err) {
pr_err("kunit executor: error filtering suites: %d\n", err);
goto free_out;
}
}
if (!action_param)
kunit_exec_run_tests(&suite_set, true);
else if (strcmp(action_param, "list") == 0)
kunit_exec_list_tests(&suite_set, false);
else if (strcmp(action_param, "list_attr") == 0)
kunit_exec_list_tests(&suite_set, true);
else
pr_err("kunit executor: unknown action '%s'\n", action_param);
free_out:
if (filter_glob_param || filter_param)
kunit_free_suite_set(suite_set);
else if (init_num_suites > 0)
/* Don't use kunit_free_suite_set because suites aren't individually allocated */
kfree(suite_set.start);
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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