linux/lib/kunit/test.c
Jinjie Ruan 2810c1e998 kunit: Fix wild-memory-access bug in kunit_free_suite_set()
Inject fault while probing kunit-example-test.ko, if kstrdup()
fails in mod_sysfs_setup() in load_module(), the mod->state will
switch from MODULE_STATE_COMING to MODULE_STATE_GOING instead of
from MODULE_STATE_LIVE to MODULE_STATE_GOING, so only
kunit_module_exit() will be called without kunit_module_init(), and
the mod->kunit_suites is no set correctly and the free in
kunit_free_suite_set() will cause below wild-memory-access bug.

The mod->state state machine when load_module() succeeds:

MODULE_STATE_UNFORMED ---> MODULE_STATE_COMING ---> MODULE_STATE_LIVE
	 ^						|
	 |						| delete_module
	 +---------------- MODULE_STATE_GOING <---------+

The mod->state state machine when load_module() fails at
mod_sysfs_setup():

MODULE_STATE_UNFORMED ---> MODULE_STATE_COMING ---> MODULE_STATE_GOING
	^						|
	|						|
	+-----------------------------------------------+

Call kunit_module_init() at MODULE_STATE_COMING state to fix the issue
because MODULE_STATE_LIVE is transformed from it.

 Unable to handle kernel paging request at virtual address ffffff341e942a88
 KASAN: maybe wild-memory-access in range [0x0003f9a0f4a15440-0x0003f9a0f4a15447]
 Mem abort info:
   ESR = 0x0000000096000004
   EC = 0x25: DABT (current EL), IL = 32 bits
   SET = 0, FnV = 0
   EA = 0, S1PTW = 0
   FSC = 0x04: level 0 translation fault
 Data abort info:
   ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
   CM = 0, WnR = 0, TnD = 0, TagAccess = 0
   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
 swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000000441ea000
 [ffffff341e942a88] pgd=0000000000000000, p4d=0000000000000000
 Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP
 Modules linked in: kunit_example_test(-) cfg80211 rfkill 8021q garp mrp stp llc ipv6 [last unloaded: kunit_example_test]
 CPU: 3 PID: 2035 Comm: modprobe Tainted: G        W        N 6.5.0-next-20230828+ #136
 Hardware name: linux,dummy-virt (DT)
 pstate: a0000005 (NzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
 pc : kfree+0x2c/0x70
 lr : kunit_free_suite_set+0xcc/0x13c
 sp : ffff8000829b75b0
 x29: ffff8000829b75b0 x28: ffff8000829b7b90 x27: 0000000000000000
 x26: dfff800000000000 x25: ffffcd07c82a7280 x24: ffffcd07a50ab300
 x23: ffffcd07a50ab2e8 x22: 1ffff00010536ec0 x21: dfff800000000000
 x20: ffffcd07a50ab2f0 x19: ffffcd07a50ab2f0 x18: 0000000000000000
 x17: 0000000000000000 x16: 0000000000000000 x15: ffffcd07c24b6764
 x14: ffffcd07c24b63c0 x13: ffffcd07c4cebb94 x12: ffff700010536ec7
 x11: 1ffff00010536ec6 x10: ffff700010536ec6 x9 : dfff800000000000
 x8 : 00008fffefac913a x7 : 0000000041b58ab3 x6 : 0000000000000000
 x5 : 1ffff00010536ec5 x4 : ffff8000829b7628 x3 : dfff800000000000
 x2 : ffffff341e942a80 x1 : ffffcd07a50aa000 x0 : fffffc0000000000
 Call trace:
  kfree+0x2c/0x70
  kunit_free_suite_set+0xcc/0x13c
  kunit_module_notify+0xd8/0x360
  blocking_notifier_call_chain+0xc4/0x128
  load_module+0x382c/0x44a4
  init_module_from_file+0xd4/0x128
  idempotent_init_module+0x2c8/0x524
  __arm64_sys_finit_module+0xac/0x100
  invoke_syscall+0x6c/0x258
  el0_svc_common.constprop.0+0x160/0x22c
  do_el0_svc+0x44/0x5c
  el0_svc+0x38/0x78
  el0t_64_sync_handler+0x13c/0x158
  el0t_64_sync+0x190/0x194
 Code: aa0003e1 b25657e0 d34cfc42 8b021802 (f9400440)
 ---[ end trace 0000000000000000 ]---
 Kernel panic - not syncing: Oops: Fatal exception
 SMP: stopping secondary CPUs
 Kernel Offset: 0x4d0742200000 from 0xffff800080000000
 PHYS_OFFSET: 0xffffee43c0000000
 CPU features: 0x88000203,3c020000,1000421b
 Memory Limit: none
 Rebooting in 1 seconds..

Fixes: 3d6e446238 ("kunit: unify module and builtin suite definitions")
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Reviewed-by: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2023-09-05 12:29:50 -06:00

892 lines
22 KiB
C

// 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);
/*
* 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)
{
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;
}
}
test_case->run_case(test);
}
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(&param_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(&param_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(&param_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;
}
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]);
kunit_suite_counter = 1;
}
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");