1 /* SPDX-License-Identifier: GPL-2.0+ */
2 #ifndef __KSELFTEST_MODULE_H
3 #define __KSELFTEST_MODULE_H
4 
5 #include <linux/module.h>
6 
7 /*
8  * Test framework for writing test modules to be loaded by kselftest.
9  * See Documentation/dev-tools/kselftest.rst for an example test module.
10  */
11 
12 #define KSTM_MODULE_GLOBALS()			\
13 static unsigned int total_tests __initdata;	\
14 static unsigned int failed_tests __initdata;	\
15 static unsigned int skipped_tests __initdata
16 
17 #define KSTM_CHECK_ZERO(x) do {						\
18 	total_tests++;							\
19 	if (x) {							\
20 		pr_warn("TC failed at %s:%d\n", __func__, __LINE__);	\
21 		failed_tests++;						\
22 	}								\
23 } while (0)
24 
25 static inline int kstm_report(unsigned int total_tests, unsigned int failed_tests,
26 			      unsigned int skipped_tests)
27 {
28 	if (failed_tests == 0) {
29 		if (skipped_tests) {
30 			pr_info("skipped %u tests\n", skipped_tests);
31 			pr_info("remaining %u tests passed\n", total_tests);
32 		} else
33 			pr_info("all %u tests passed\n", total_tests);
34 	} else
35 		pr_warn("failed %u out of %u tests\n", failed_tests, total_tests);
36 
37 	return failed_tests ? -EINVAL : 0;
38 }
39 
40 #define KSTM_MODULE_LOADERS(__module)			\
41 static int __init __module##_init(void)			\
42 {							\
43 	pr_info("loaded.\n");				\
44 	selftest();					\
45 	return kstm_report(total_tests, failed_tests, skipped_tests);	\
46 }							\
47 static void __exit __module##_exit(void)		\
48 {							\
49 	pr_info("unloaded.\n");				\
50 }							\
51 module_init(__module##_init);				\
52 module_exit(__module##_exit)
53 
54 #endif	/* __KSELFTEST_MODULE_H */
55