diff options
Diffstat (limited to 'lib/kunit/test.c')
| -rw-r--r-- | lib/kunit/test.c | 929 |
1 files changed, 929 insertions, 0 deletions
diff --git a/lib/kunit/test.c b/lib/kunit/test.c new file mode 100644 index 0000000000..7452d1a2ac --- /dev/null +++ b/lib/kunit/test.c @@ -0,0 +1,929 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Base unit test (KUnit) API. + * + * Copyright (C) 2019, Google LLC. + * Author: Brendan Higgins <brendanhiggins@google.com> + */ + +#include <kunit/resource.h> +#include <kunit/test.h> +#include <kunit/test-bug.h> +#include <kunit/attributes.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/panic.h> +#include <linux/sched/debug.h> +#include <linux/sched.h> + +#include "debugfs.h" +#include "hooks-impl.h" +#include "string-stream.h" +#include "try-catch-impl.h" + +/* + * Hook to fail the current test and print an error message to the log. + */ +void __printf(3, 4) __kunit_fail_current_test_impl(const char *file, int line, const char *fmt, ...) +{ + va_list args; + int len; + char *buffer; + + if (!current->kunit_test) + return; + + kunit_set_failure(current->kunit_test); + + /* kunit_err() only accepts literals, so evaluate the args first. */ + va_start(args, fmt); + len = vsnprintf(NULL, 0, fmt, args) + 1; + va_end(args); + + buffer = kunit_kmalloc(current->kunit_test, len, GFP_KERNEL); + if (!buffer) + return; + + va_start(args, fmt); + vsnprintf(buffer, len, fmt, args); + va_end(args); + + kunit_err(current->kunit_test, "%s:%d: %s", file, line, buffer); + kunit_kfree(current->kunit_test, buffer); +} + +/* + * Enable KUnit tests to run. + */ +#ifdef CONFIG_KUNIT_DEFAULT_ENABLED +static bool enable_param = true; +#else +static bool enable_param; +#endif +module_param_named(enable, enable_param, bool, 0); +MODULE_PARM_DESC(enable, "Enable KUnit tests"); + +/* + * KUnit statistic mode: + * 0 - disabled + * 1 - only when there is more than one subtest + * 2 - enabled + */ +static int kunit_stats_enabled = 1; +module_param_named(stats_enabled, kunit_stats_enabled, int, 0644); +MODULE_PARM_DESC(stats_enabled, + "Print test stats: never (0), only for multiple subtests (1), or always (2)"); + +struct kunit_result_stats { + unsigned long passed; + unsigned long skipped; + unsigned long failed; + unsigned long total; +}; + +static bool kunit_should_print_stats(struct kunit_result_stats stats) +{ + if (kunit_stats_enabled == 0) + return false; + + if (kunit_stats_enabled == 2) + return true; + + return (stats.total > 1); +} + +static void kunit_print_test_stats(struct kunit *test, + struct kunit_result_stats stats) +{ + if (!kunit_should_print_stats(stats)) + return; + + kunit_log(KERN_INFO, test, + KUNIT_SUBTEST_INDENT + "# %s: pass:%lu fail:%lu skip:%lu total:%lu", + test->name, + stats.passed, + stats.failed, + stats.skipped, + stats.total); +} + +/** + * kunit_log_newline() - Add newline to the end of log if one is not + * already present. + * @log: The log to add the newline to. + */ +static void kunit_log_newline(char *log) +{ + int log_len, len_left; + + log_len = strlen(log); + len_left = KUNIT_LOG_SIZE - log_len - 1; + + if (log_len > 0 && log[log_len - 1] != '\n') + strncat(log, "\n", len_left); +} + +/* + * Append formatted message to log, size of which is limited to + * KUNIT_LOG_SIZE bytes (including null terminating byte). + */ +void kunit_log_append(char *log, const char *fmt, ...) +{ + va_list args; + int len, log_len, len_left; + + if (!log) + return; + + log_len = strlen(log); + len_left = KUNIT_LOG_SIZE - log_len - 1; + if (len_left <= 0) + return; + + /* Evaluate length of line to add to log */ + va_start(args, fmt); + len = vsnprintf(NULL, 0, fmt, args) + 1; + va_end(args); + + /* Print formatted line to the log */ + va_start(args, fmt); + vsnprintf(log + log_len, min(len, len_left), fmt, args); + va_end(args); + + /* Add newline to end of log if not already present. */ + kunit_log_newline(log); +} +EXPORT_SYMBOL_GPL(kunit_log_append); + +size_t kunit_suite_num_test_cases(struct kunit_suite *suite) +{ + struct kunit_case *test_case; + size_t len = 0; + + kunit_suite_for_each_test_case(suite, test_case) + len++; + + return len; +} +EXPORT_SYMBOL_GPL(kunit_suite_num_test_cases); + +/* Currently supported test levels */ +enum { + KUNIT_LEVEL_SUITE = 0, + KUNIT_LEVEL_CASE, + KUNIT_LEVEL_CASE_PARAM, +}; + +static void kunit_print_suite_start(struct kunit_suite *suite) +{ + /* + * We do not log the test suite header as doing so would + * mean debugfs display would consist of the test suite + * header prior to individual test results. + * Hence directly printk the suite status, and we will + * separately seq_printf() the suite header for the debugfs + * representation. + */ + pr_info(KUNIT_SUBTEST_INDENT "KTAP version 1\n"); + pr_info(KUNIT_SUBTEST_INDENT "# Subtest: %s\n", + suite->name); + kunit_print_attr((void *)suite, false, KUNIT_LEVEL_CASE); + pr_info(KUNIT_SUBTEST_INDENT "1..%zd\n", + kunit_suite_num_test_cases(suite)); +} + +static void kunit_print_ok_not_ok(struct kunit *test, + unsigned int test_level, + enum kunit_status status, + size_t test_number, + const char *description, + const char *directive) +{ + const char *directive_header = (status == KUNIT_SKIPPED) ? " # SKIP " : ""; + const char *directive_body = (status == KUNIT_SKIPPED) ? directive : ""; + + /* + * When test is NULL assume that results are from the suite + * and today suite results are expected at level 0 only. + */ + WARN(!test && test_level, "suite test level can't be %u!\n", test_level); + + /* + * We do not log the test suite results as doing so would + * mean debugfs display would consist of an incorrect test + * number. Hence directly printk the suite result, and we will + * separately seq_printf() the suite results for the debugfs + * representation. + */ + if (!test) + pr_info("%s %zd %s%s%s\n", + kunit_status_to_ok_not_ok(status), + test_number, description, directive_header, + directive_body); + else + kunit_log(KERN_INFO, test, + "%*s%s %zd %s%s%s", + KUNIT_INDENT_LEN * test_level, "", + kunit_status_to_ok_not_ok(status), + test_number, description, directive_header, + directive_body); +} + +enum kunit_status kunit_suite_has_succeeded(struct kunit_suite *suite) +{ + const struct kunit_case *test_case; + enum kunit_status status = KUNIT_SKIPPED; + + if (suite->suite_init_err) + return KUNIT_FAILURE; + + kunit_suite_for_each_test_case(suite, test_case) { + if (test_case->status == KUNIT_FAILURE) + return KUNIT_FAILURE; + else if (test_case->status == KUNIT_SUCCESS) + status = KUNIT_SUCCESS; + } + + return status; +} +EXPORT_SYMBOL_GPL(kunit_suite_has_succeeded); + +static size_t kunit_suite_counter = 1; + +static void kunit_print_suite_end(struct kunit_suite *suite) +{ + kunit_print_ok_not_ok(NULL, KUNIT_LEVEL_SUITE, + kunit_suite_has_succeeded(suite), + kunit_suite_counter++, + suite->name, + suite->status_comment); +} + +unsigned int kunit_test_case_num(struct kunit_suite *suite, + struct kunit_case *test_case) +{ + struct kunit_case *tc; + unsigned int i = 1; + + kunit_suite_for_each_test_case(suite, tc) { + if (tc == test_case) + return i; + i++; + } + + return 0; +} +EXPORT_SYMBOL_GPL(kunit_test_case_num); + +static void kunit_print_string_stream(struct kunit *test, + struct string_stream *stream) +{ + struct string_stream_fragment *fragment; + char *buf; + + if (string_stream_is_empty(stream)) + return; + + buf = string_stream_get_string(stream); + if (!buf) { + kunit_err(test, + "Could not allocate buffer, dumping stream:\n"); + list_for_each_entry(fragment, &stream->fragments, node) { + kunit_err(test, "%s", fragment->fragment); + } + kunit_err(test, "\n"); + } else { + kunit_err(test, "%s", buf); + kunit_kfree(test, buf); + } +} + +static void kunit_fail(struct kunit *test, const struct kunit_loc *loc, + enum kunit_assert_type type, const struct kunit_assert *assert, + assert_format_t assert_format, const struct va_format *message) +{ + struct string_stream *stream; + + kunit_set_failure(test); + + stream = alloc_string_stream(test, GFP_KERNEL); + if (IS_ERR(stream)) { + WARN(true, + "Could not allocate stream to print failed assertion in %s:%d\n", + loc->file, + loc->line); + return; + } + + kunit_assert_prologue(loc, type, stream); + assert_format(assert, message, stream); + + kunit_print_string_stream(test, stream); + + string_stream_destroy(stream); +} + +void __noreturn __kunit_abort(struct kunit *test) +{ + kunit_try_catch_throw(&test->try_catch); /* Does not return. */ + + /* + * Throw could not abort from test. + * + * XXX: we should never reach this line! As kunit_try_catch_throw is + * marked __noreturn. + */ + WARN_ONCE(true, "Throw could not abort from test!\n"); +} +EXPORT_SYMBOL_GPL(__kunit_abort); + +void __kunit_do_failed_assertion(struct kunit *test, + const struct kunit_loc *loc, + enum kunit_assert_type type, + const struct kunit_assert *assert, + assert_format_t assert_format, + const char *fmt, ...) +{ + va_list args; + struct va_format message; + va_start(args, fmt); + + message.fmt = fmt; + message.va = &args; + + kunit_fail(test, loc, type, assert, assert_format, &message); + + va_end(args); +} +EXPORT_SYMBOL_GPL(__kunit_do_failed_assertion); + +void kunit_init_test(struct kunit *test, const char *name, char *log) +{ + spin_lock_init(&test->lock); + INIT_LIST_HEAD(&test->resources); + test->name = name; + test->log = log; + if (test->log) + test->log[0] = '\0'; + test->status = KUNIT_SUCCESS; + test->status_comment[0] = '\0'; +} +EXPORT_SYMBOL_GPL(kunit_init_test); + +/* Only warn when a test takes more than twice the threshold */ +#define KUNIT_SPEED_WARNING_MULTIPLIER 2 + +/* Slow tests are defined as taking more than 1s */ +#define KUNIT_SPEED_SLOW_THRESHOLD_S 1 + +#define KUNIT_SPEED_SLOW_WARNING_THRESHOLD_S \ + (KUNIT_SPEED_WARNING_MULTIPLIER * KUNIT_SPEED_SLOW_THRESHOLD_S) + +#define s_to_timespec64(s) ns_to_timespec64((s) * NSEC_PER_SEC) + +static void kunit_run_case_check_speed(struct kunit *test, + struct kunit_case *test_case, + struct timespec64 duration) +{ + struct timespec64 slow_thr = + s_to_timespec64(KUNIT_SPEED_SLOW_WARNING_THRESHOLD_S); + enum kunit_speed speed = test_case->attr.speed; + + if (timespec64_compare(&duration, &slow_thr) < 0) + return; + + if (speed == KUNIT_SPEED_VERY_SLOW || speed == KUNIT_SPEED_SLOW) + return; + + kunit_warn(test, + "Test should be marked slow (runtime: %lld.%09lds)", + duration.tv_sec, duration.tv_nsec); +} + +/* + * Initializes and runs test case. Does not clean up or do post validations. + */ +static void kunit_run_case_internal(struct kunit *test, + struct kunit_suite *suite, + struct kunit_case *test_case) +{ + struct timespec64 start, end; + + if (suite->init) { + int ret; + + ret = suite->init(test); + if (ret) { + kunit_err(test, "failed to initialize: %d\n", ret); + kunit_set_failure(test); + return; + } + } + + ktime_get_ts64(&start); + + test_case->run_case(test); + + ktime_get_ts64(&end); + + kunit_run_case_check_speed(test, test_case, timespec64_sub(end, start)); +} + +static void kunit_case_internal_cleanup(struct kunit *test) +{ + kunit_cleanup(test); +} + +/* + * Performs post validations and cleanup after a test case was run. + * XXX: Should ONLY BE CALLED AFTER kunit_run_case_internal! + */ +static void kunit_run_case_cleanup(struct kunit *test, + struct kunit_suite *suite) +{ + if (suite->exit) + suite->exit(test); + + kunit_case_internal_cleanup(test); +} + +struct kunit_try_catch_context { + struct kunit *test; + struct kunit_suite *suite; + struct kunit_case *test_case; +}; + +static void kunit_try_run_case(void *data) +{ + struct kunit_try_catch_context *ctx = data; + struct kunit *test = ctx->test; + struct kunit_suite *suite = ctx->suite; + struct kunit_case *test_case = ctx->test_case; + + current->kunit_test = test; + + /* + * kunit_run_case_internal may encounter a fatal error; if it does, + * abort will be called, this thread will exit, and finally the parent + * thread will resume control and handle any necessary clean up. + */ + kunit_run_case_internal(test, suite, test_case); +} + +static void kunit_try_run_case_cleanup(void *data) +{ + struct kunit_try_catch_context *ctx = data; + struct kunit *test = ctx->test; + struct kunit_suite *suite = ctx->suite; + + current->kunit_test = test; + + kunit_run_case_cleanup(test, suite); +} + +static void kunit_catch_run_case_cleanup(void *data) +{ + struct kunit_try_catch_context *ctx = data; + struct kunit *test = ctx->test; + int try_exit_code = kunit_try_catch_get_result(&test->try_catch); + + /* It is always a failure if cleanup aborts. */ + kunit_set_failure(test); + + if (try_exit_code) { + /* + * Test case could not finish, we have no idea what state it is + * in, so don't do clean up. + */ + if (try_exit_code == -ETIMEDOUT) { + kunit_err(test, "test case cleanup timed out\n"); + /* + * Unknown internal error occurred preventing test case from + * running, so there is nothing to clean up. + */ + } else { + kunit_err(test, "internal error occurred during test case cleanup: %d\n", + try_exit_code); + } + return; + } + + kunit_err(test, "test aborted during cleanup. continuing without cleaning up\n"); +} + + +static void kunit_catch_run_case(void *data) +{ + struct kunit_try_catch_context *ctx = data; + struct kunit *test = ctx->test; + int try_exit_code = kunit_try_catch_get_result(&test->try_catch); + + if (try_exit_code) { + kunit_set_failure(test); + /* + * Test case could not finish, we have no idea what state it is + * in, so don't do clean up. + */ + if (try_exit_code == -ETIMEDOUT) { + kunit_err(test, "test case timed out\n"); + /* + * Unknown internal error occurred preventing test case from + * running, so there is nothing to clean up. + */ + } else { + kunit_err(test, "internal error occurred preventing test case from running: %d\n", + try_exit_code); + } + return; + } +} + +/* + * Performs all logic to run a test case. It also catches most errors that + * occur in a test case and reports them as failures. + */ +static void kunit_run_case_catch_errors(struct kunit_suite *suite, + struct kunit_case *test_case, + struct kunit *test) +{ + struct kunit_try_catch_context context; + struct kunit_try_catch *try_catch; + + try_catch = &test->try_catch; + + kunit_try_catch_init(try_catch, + test, + kunit_try_run_case, + kunit_catch_run_case); + context.test = test; + context.suite = suite; + context.test_case = test_case; + kunit_try_catch_run(try_catch, &context); + + /* Now run the cleanup */ + kunit_try_catch_init(try_catch, + test, + kunit_try_run_case_cleanup, + kunit_catch_run_case_cleanup); + kunit_try_catch_run(try_catch, &context); + + /* Propagate the parameter result to the test case. */ + if (test->status == KUNIT_FAILURE) + test_case->status = KUNIT_FAILURE; + else if (test_case->status != KUNIT_FAILURE && test->status == KUNIT_SUCCESS) + test_case->status = KUNIT_SUCCESS; +} + +static void kunit_print_suite_stats(struct kunit_suite *suite, + struct kunit_result_stats suite_stats, + struct kunit_result_stats param_stats) +{ + if (kunit_should_print_stats(suite_stats)) { + kunit_log(KERN_INFO, suite, + "# %s: pass:%lu fail:%lu skip:%lu total:%lu", + suite->name, + suite_stats.passed, + suite_stats.failed, + suite_stats.skipped, + suite_stats.total); + } + + if (kunit_should_print_stats(param_stats)) { + kunit_log(KERN_INFO, suite, + "# Totals: pass:%lu fail:%lu skip:%lu total:%lu", + param_stats.passed, + param_stats.failed, + param_stats.skipped, + param_stats.total); + } +} + +static void kunit_update_stats(struct kunit_result_stats *stats, + enum kunit_status status) +{ + switch (status) { + case KUNIT_SUCCESS: + stats->passed++; + break; + case KUNIT_SKIPPED: + stats->skipped++; + break; + case KUNIT_FAILURE: + stats->failed++; + break; + } + + stats->total++; +} + +static void kunit_accumulate_stats(struct kunit_result_stats *total, + struct kunit_result_stats add) +{ + total->passed += add.passed; + total->skipped += add.skipped; + total->failed += add.failed; + total->total += add.total; +} + +int kunit_run_tests(struct kunit_suite *suite) +{ + char param_desc[KUNIT_PARAM_DESC_SIZE]; + struct kunit_case *test_case; + struct kunit_result_stats suite_stats = { 0 }; + struct kunit_result_stats total_stats = { 0 }; + + /* Taint the kernel so we know we've run tests. */ + add_taint(TAINT_TEST, LOCKDEP_STILL_OK); + + if (suite->suite_init) { + suite->suite_init_err = suite->suite_init(suite); + if (suite->suite_init_err) { + kunit_err(suite, KUNIT_SUBTEST_INDENT + "# failed to initialize (%d)", suite->suite_init_err); + goto suite_end; + } + } + + kunit_print_suite_start(suite); + + kunit_suite_for_each_test_case(suite, test_case) { + struct kunit test = { .param_value = NULL, .param_index = 0 }; + struct kunit_result_stats param_stats = { 0 }; + + kunit_init_test(&test, test_case->name, test_case->log); + if (test_case->status == KUNIT_SKIPPED) { + /* Test marked as skip */ + test.status = KUNIT_SKIPPED; + kunit_update_stats(¶m_stats, test.status); + } else if (!test_case->generate_params) { + /* Non-parameterised test. */ + test_case->status = KUNIT_SKIPPED; + kunit_run_case_catch_errors(suite, test_case, &test); + kunit_update_stats(¶m_stats, test.status); + } else { + /* Get initial param. */ + param_desc[0] = '\0'; + test.param_value = test_case->generate_params(NULL, param_desc); + test_case->status = KUNIT_SKIPPED; + kunit_log(KERN_INFO, &test, KUNIT_SUBTEST_INDENT KUNIT_SUBTEST_INDENT + "KTAP version 1\n"); + kunit_log(KERN_INFO, &test, KUNIT_SUBTEST_INDENT KUNIT_SUBTEST_INDENT + "# Subtest: %s", test_case->name); + + while (test.param_value) { + kunit_run_case_catch_errors(suite, test_case, &test); + + if (param_desc[0] == '\0') { + snprintf(param_desc, sizeof(param_desc), + "param-%d", test.param_index); + } + + kunit_print_ok_not_ok(&test, KUNIT_LEVEL_CASE_PARAM, + test.status, + test.param_index + 1, + param_desc, + test.status_comment); + + /* Get next param. */ + param_desc[0] = '\0'; + test.param_value = test_case->generate_params(test.param_value, param_desc); + test.param_index++; + + kunit_update_stats(¶m_stats, test.status); + } + } + + kunit_print_attr((void *)test_case, true, KUNIT_LEVEL_CASE); + + kunit_print_test_stats(&test, param_stats); + + kunit_print_ok_not_ok(&test, KUNIT_LEVEL_CASE, test_case->status, + kunit_test_case_num(suite, test_case), + test_case->name, + test.status_comment); + + kunit_update_stats(&suite_stats, test_case->status); + kunit_accumulate_stats(&total_stats, param_stats); + } + + if (suite->suite_exit) + suite->suite_exit(suite); + + kunit_print_suite_stats(suite, suite_stats, total_stats); +suite_end: + kunit_print_suite_end(suite); + + return 0; +} +EXPORT_SYMBOL_GPL(kunit_run_tests); + +static void kunit_init_suite(struct kunit_suite *suite) +{ + kunit_debugfs_create_suite(suite); + suite->status_comment[0] = '\0'; + suite->suite_init_err = 0; +} + +bool kunit_enabled(void) +{ + return enable_param; +} + +int __kunit_test_suites_init(struct kunit_suite * const * const suites, int num_suites) +{ + unsigned int i; + + if (!kunit_enabled() && num_suites > 0) { + pr_info("kunit: disabled\n"); + return 0; + } + + kunit_suite_counter = 1; + + static_branch_inc(&kunit_running); + + for (i = 0; i < num_suites; i++) { + kunit_init_suite(suites[i]); + kunit_run_tests(suites[i]); + } + + static_branch_dec(&kunit_running); + return 0; +} +EXPORT_SYMBOL_GPL(__kunit_test_suites_init); + +static void kunit_exit_suite(struct kunit_suite *suite) +{ + kunit_debugfs_destroy_suite(suite); +} + +void __kunit_test_suites_exit(struct kunit_suite **suites, int num_suites) +{ + unsigned int i; + + if (!kunit_enabled()) + return; + + for (i = 0; i < num_suites; i++) + kunit_exit_suite(suites[i]); +} +EXPORT_SYMBOL_GPL(__kunit_test_suites_exit); + +#ifdef CONFIG_MODULES +static void kunit_module_init(struct module *mod) +{ + struct kunit_suite_set suite_set = { + mod->kunit_suites, mod->kunit_suites + mod->num_kunit_suites, + }; + const char *action = kunit_action(); + int err = 0; + + suite_set = kunit_filter_suites(&suite_set, + kunit_filter_glob() ?: "*.*", + kunit_filter(), kunit_filter_action(), + &err); + if (err) + pr_err("kunit module: error filtering suites: %d\n", err); + + mod->kunit_suites = (struct kunit_suite **)suite_set.start; + mod->num_kunit_suites = suite_set.end - suite_set.start; + + if (!action) + kunit_exec_run_tests(&suite_set, false); + else if (!strcmp(action, "list")) + kunit_exec_list_tests(&suite_set, false); + else if (!strcmp(action, "list_attr")) + kunit_exec_list_tests(&suite_set, true); + else + pr_err("kunit: unknown action '%s'\n", action); +} + +static void kunit_module_exit(struct module *mod) +{ + struct kunit_suite_set suite_set = { + mod->kunit_suites, mod->kunit_suites + mod->num_kunit_suites, + }; + const char *action = kunit_action(); + + if (!action) + __kunit_test_suites_exit(mod->kunit_suites, + mod->num_kunit_suites); + + if (suite_set.start) + kunit_free_suite_set(suite_set); +} + +static int kunit_module_notify(struct notifier_block *nb, unsigned long val, + void *data) +{ + struct module *mod = data; + + switch (val) { + case MODULE_STATE_LIVE: + break; + case MODULE_STATE_GOING: + kunit_module_exit(mod); + break; + case MODULE_STATE_COMING: + kunit_module_init(mod); + break; + case MODULE_STATE_UNFORMED: + break; + } + + return 0; +} + +static struct notifier_block kunit_mod_nb = { + .notifier_call = kunit_module_notify, + .priority = 0, +}; +#endif + +void *kunit_kmalloc_array(struct kunit *test, size_t n, size_t size, gfp_t gfp) +{ + void *data; + + data = kmalloc_array(n, size, gfp); + + if (!data) + return NULL; + + if (kunit_add_action_or_reset(test, (kunit_action_t *)kfree, data) != 0) + return NULL; + + return data; +} +EXPORT_SYMBOL_GPL(kunit_kmalloc_array); + +void kunit_kfree(struct kunit *test, const void *ptr) +{ + if (!ptr) + return; + + kunit_release_action(test, (kunit_action_t *)kfree, (void *)ptr); +} +EXPORT_SYMBOL_GPL(kunit_kfree); + +void kunit_cleanup(struct kunit *test) +{ + struct kunit_resource *res; + unsigned long flags; + + /* + * test->resources is a stack - each allocation must be freed in the + * reverse order from which it was added since one resource may depend + * on another for its entire lifetime. + * Also, we cannot use the normal list_for_each constructs, even the + * safe ones because *arbitrary* nodes may be deleted when + * kunit_resource_free is called; the list_for_each_safe variants only + * protect against the current node being deleted, not the next. + */ + while (true) { + spin_lock_irqsave(&test->lock, flags); + if (list_empty(&test->resources)) { + spin_unlock_irqrestore(&test->lock, flags); + break; + } + res = list_last_entry(&test->resources, + struct kunit_resource, + node); + /* + * Need to unlock here as a resource may remove another + * resource, and this can't happen if the test->lock + * is held. + */ + spin_unlock_irqrestore(&test->lock, flags); + kunit_remove_resource(test, res); + } + current->kunit_test = NULL; +} +EXPORT_SYMBOL_GPL(kunit_cleanup); + +static int __init kunit_init(void) +{ + /* Install the KUnit hook functions. */ + kunit_install_hooks(); + + kunit_debugfs_init(); +#ifdef CONFIG_MODULES + return register_module_notifier(&kunit_mod_nb); +#else + return 0; +#endif +} +late_initcall(kunit_init); + +static void __exit kunit_exit(void) +{ + memset(&kunit_hooks, 0, sizeof(kunit_hooks)); +#ifdef CONFIG_MODULES + unregister_module_notifier(&kunit_mod_nb); +#endif + kunit_debugfs_cleanup(); +} +module_exit(kunit_exit); + +MODULE_LICENSE("GPL v2"); |