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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * kselftest.h: low-level kselftest framework to include from
4 * selftest programs. When possible, please use
5 * kselftest_harness.h instead.
6 *
7 * Copyright (c) 2014 Shuah Khan <[email protected]>
8 * Copyright (c) 2014 Samsung Electronics Co., Ltd.
9 *
10 * Using this API consists of first counting how many tests your code
11 * has to run, and then starting up the reporting:
12 *
13 * ksft_print_header();
14 * ksft_set_plan(total_number_of_tests);
15 *
16 * For each test, report any progress, debugging, etc with:
17 *
18 * ksft_print_msg(fmt, ...);
19 * ksft_perror(msg);
20 *
21 * and finally report the pass/fail/skip/xfail/xpass state of the test
22 * with one of:
23 *
24 * ksft_test_result(condition, fmt, ...);
25 * ksft_test_result_report(result, fmt, ...);
26 * ksft_test_result_pass(fmt, ...);
27 * ksft_test_result_fail(fmt, ...);
28 * ksft_test_result_skip(fmt, ...);
29 * ksft_test_result_xfail(fmt, ...);
30 * ksft_test_result_xpass(fmt, ...);
31 * ksft_test_result_error(fmt, ...);
32 * ksft_test_result_code(exit_code, test_name, fmt, ...);
33 *
34 * When all tests are finished, clean up and exit the program with one of:
35 *
36 * ksft_finished();
37 * ksft_exit(condition);
38 * ksft_exit_pass();
39 * ksft_exit_fail();
40 *
41 * If the program wants to report details on why the entire program has
42 * failed, it can instead exit with a message (this is usually done when
43 * the program is aborting before finishing all tests):
44 *
45 * ksft_exit_fail_msg(fmt, ...);
46 * ksft_exit_fail_perror(msg);
47 *
48 */
49#ifndef __KSELFTEST_H
50#define __KSELFTEST_H
51
52#ifndef NOLIBC
53#include <errno.h>
54#include <stdlib.h>
55#include <unistd.h>
56#include <stdarg.h>
57#include <stdbool.h>
58#include <string.h>
59#include <stdio.h>
60#include <sys/utsname.h>
61#endif
62
63#ifndef ARRAY_SIZE
64#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
65#endif
66
67#if defined(__i386__) || defined(__x86_64__) /* arch */
68/*
69 * gcc cpuid.h provides __cpuid_count() since v4.4.
70 * Clang/LLVM cpuid.h provides __cpuid_count() since v3.4.0.
71 *
72 * Provide local define for tests needing __cpuid_count() because
73 * selftests need to work in older environments that do not yet
74 * have __cpuid_count().
75 */
76#ifndef __cpuid_count
77#define __cpuid_count(level, count, a, b, c, d) \
78 __asm__ __volatile__ ("cpuid\n\t" \
79 : "=a" (a), "=b" (b), "=c" (c), "=d" (d) \
80 : "0" (level), "2" (count))
81#endif
82#endif /* end arch */
83
84/* define kselftest exit codes */
85#define KSFT_PASS 0
86#define KSFT_FAIL 1
87#define KSFT_XFAIL 2
88#define KSFT_XPASS 3
89#define KSFT_SKIP 4
90
91#ifndef __noreturn
92#define __noreturn __attribute__((__noreturn__))
93#endif
94#define __printf(a, b) __attribute__((format(printf, a, b)))
95
96#ifndef __always_unused
97#define __always_unused __attribute__((__unused__))
98#endif
99
100#ifndef __maybe_unused
101#define __maybe_unused __attribute__((__unused__))
102#endif
103
104/* counters */
105struct ksft_count {
106 unsigned int ksft_pass;
107 unsigned int ksft_fail;
108 unsigned int ksft_xfail;
109 unsigned int ksft_xpass;
110 unsigned int ksft_xskip;
111 unsigned int ksft_error;
112};
113
114static struct ksft_count ksft_cnt;
115static unsigned int ksft_plan;
116static bool ksft_debug_enabled;
117
118static inline unsigned int ksft_test_num(void)
119{
120 return ksft_cnt.ksft_pass + ksft_cnt.ksft_fail +
121 ksft_cnt.ksft_xfail + ksft_cnt.ksft_xpass +
122 ksft_cnt.ksft_xskip + ksft_cnt.ksft_error;
123}
124
125static inline void ksft_inc_pass_cnt(void) { ksft_cnt.ksft_pass++; }
126static inline void ksft_inc_fail_cnt(void) { ksft_cnt.ksft_fail++; }
127static inline void ksft_inc_xfail_cnt(void) { ksft_cnt.ksft_xfail++; }
128static inline void ksft_inc_xpass_cnt(void) { ksft_cnt.ksft_xpass++; }
129static inline void ksft_inc_xskip_cnt(void) { ksft_cnt.ksft_xskip++; }
130static inline void ksft_inc_error_cnt(void) { ksft_cnt.ksft_error++; }
131
132static inline int ksft_get_pass_cnt(void) { return ksft_cnt.ksft_pass; }
133static inline int ksft_get_fail_cnt(void) { return ksft_cnt.ksft_fail; }
134static inline int ksft_get_xfail_cnt(void) { return ksft_cnt.ksft_xfail; }
135static inline int ksft_get_xpass_cnt(void) { return ksft_cnt.ksft_xpass; }
136static inline int ksft_get_xskip_cnt(void) { return ksft_cnt.ksft_xskip; }
137static inline int ksft_get_error_cnt(void) { return ksft_cnt.ksft_error; }
138
139static inline void ksft_print_header(void)
140{
141 /*
142 * Force line buffering; If stdout is not connected to a terminal, it
143 * will otherwise default to fully buffered, which can cause output
144 * duplication if there is content in the buffer when fork()ing. If
145 * there is a crash, line buffering also means the most recent output
146 * line will be visible.
147 */
148 setvbuf(stdout, NULL, _IOLBF, 0);
149
150 if (!(getenv("KSFT_TAP_LEVEL")))
151 printf("TAP version 13\n");
152}
153
154static inline void ksft_set_plan(unsigned int plan)
155{
156 ksft_plan = plan;
157 printf("1..%u\n", ksft_plan);
158}
159
160static inline void ksft_print_cnts(void)
161{
162 if (ksft_cnt.ksft_xskip > 0)
163 printf(
164 "# %u skipped test(s) detected. Consider enabling relevant config options to improve coverage.\n",
165 ksft_cnt.ksft_xskip
166 );
167 if (ksft_plan != ksft_test_num())
168 printf("# Planned tests != run tests (%u != %u)\n",
169 ksft_plan, ksft_test_num());
170 printf("# Totals: pass:%u fail:%u xfail:%u xpass:%u skip:%u error:%u\n",
171 ksft_cnt.ksft_pass, ksft_cnt.ksft_fail,
172 ksft_cnt.ksft_xfail, ksft_cnt.ksft_xpass,
173 ksft_cnt.ksft_xskip, ksft_cnt.ksft_error);
174}
175
176static inline __printf(1, 2) void ksft_print_msg(const char *msg, ...)
177{
178 int saved_errno = errno;
179 va_list args;
180
181 va_start(args, msg);
182 printf("# ");
183 errno = saved_errno;
184 vprintf(msg, args);
185 va_end(args);
186}
187
188static inline void ksft_print_dbg_msg(const char *msg, ...)
189{
190 va_list args;
191
192 if (!ksft_debug_enabled)
193 return;
194
195 va_start(args, msg);
196 ksft_print_msg(msg, args);
197 va_end(args);
198}
199
200static inline void ksft_perror(const char *msg)
201{
202 ksft_print_msg("%s: %s (%d)\n", msg, strerror(errno), errno);
203}
204
205static inline __printf(1, 2) void ksft_test_result_pass(const char *msg, ...)
206{
207 int saved_errno = errno;
208 va_list args;
209
210 ksft_cnt.ksft_pass++;
211
212 va_start(args, msg);
213 printf("ok %u ", ksft_test_num());
214 errno = saved_errno;
215 vprintf(msg, args);
216 va_end(args);
217}
218
219static inline __printf(1, 2) void ksft_test_result_fail(const char *msg, ...)
220{
221 int saved_errno = errno;
222 va_list args;
223
224 ksft_cnt.ksft_fail++;
225
226 va_start(args, msg);
227 printf("not ok %u ", ksft_test_num());
228 errno = saved_errno;
229 vprintf(msg, args);
230 va_end(args);
231}
232
233/**
234 * ksft_test_result() - Report test success based on truth of condition
235 *
236 * @condition: if true, report test success, otherwise failure.
237 */
238#define ksft_test_result(condition, fmt, ...) do { \
239 if (!!(condition)) \
240 ksft_test_result_pass(fmt, ##__VA_ARGS__);\
241 else \
242 ksft_test_result_fail(fmt, ##__VA_ARGS__);\
243 } while (0)
244
245static inline __printf(1, 2) void ksft_test_result_xfail(const char *msg, ...)
246{
247 int saved_errno = errno;
248 va_list args;
249
250 ksft_cnt.ksft_xfail++;
251
252 va_start(args, msg);
253 printf("ok %u # XFAIL ", ksft_test_num());
254 errno = saved_errno;
255 vprintf(msg, args);
256 va_end(args);
257}
258
259static inline __printf(1, 2) void ksft_test_result_xpass(const char *msg, ...)
260{
261 int saved_errno = errno;
262 va_list args;
263
264 ksft_cnt.ksft_xpass++;
265
266 va_start(args, msg);
267 printf("ok %u # XPASS ", ksft_test_num());
268 errno = saved_errno;
269 vprintf(msg, args);
270 va_end(args);
271}
272
273static inline __printf(1, 2) void ksft_test_result_skip(const char *msg, ...)
274{
275 int saved_errno = errno;
276 va_list args;
277
278 ksft_cnt.ksft_xskip++;
279
280 va_start(args, msg);
281 printf("ok %u # SKIP ", ksft_test_num());
282 errno = saved_errno;
283 vprintf(msg, args);
284 va_end(args);
285}
286
287/* TODO: how does "error" differ from "fail" or "skip"? */
288static inline __printf(1, 2) void ksft_test_result_error(const char *msg, ...)
289{
290 int saved_errno = errno;
291 va_list args;
292
293 ksft_cnt.ksft_error++;
294
295 va_start(args, msg);
296 printf("not ok %u # error ", ksft_test_num());
297 errno = saved_errno;
298 vprintf(msg, args);
299 va_end(args);
300}
301
302static inline __printf(3, 4)
303void ksft_test_result_code(int exit_code, const char *test_name,
304 const char *msg, ...)
305{
306 const char *tap_code = "ok";
307 const char *directive = "";
308 int saved_errno = errno;
309 va_list args;
310
311 switch (exit_code) {
312 case KSFT_PASS:
313 ksft_cnt.ksft_pass++;
314 break;
315 case KSFT_XFAIL:
316 directive = " # XFAIL ";
317 ksft_cnt.ksft_xfail++;
318 break;
319 case KSFT_XPASS:
320 directive = " # XPASS ";
321 ksft_cnt.ksft_xpass++;
322 break;
323 case KSFT_SKIP:
324 directive = " # SKIP ";
325 ksft_cnt.ksft_xskip++;
326 break;
327 case KSFT_FAIL:
328 default:
329 tap_code = "not ok";
330 ksft_cnt.ksft_fail++;
331 break;
332 }
333
334 /* Docs seem to call for double space if directive is absent */
335 if (!directive[0] && msg)
336 directive = " # ";
337
338 printf("%s %u %s%s", tap_code, ksft_test_num(), test_name, directive);
339 errno = saved_errno;
340 if (msg) {
341 va_start(args, msg);
342 vprintf(msg, args);
343 va_end(args);
344 }
345 printf("\n");
346}
347
348/**
349 * ksft_test_result_report() - Report test result based on a kselftest exit code
350 *
351 * @result: a kselftest exit code
352 */
353#define ksft_test_result_report(result, fmt, ...) do { \
354 switch (result) { \
355 case KSFT_PASS: \
356 ksft_test_result_pass(fmt, ##__VA_ARGS__); \
357 break; \
358 case KSFT_FAIL: \
359 ksft_test_result_fail(fmt, ##__VA_ARGS__); \
360 break; \
361 case KSFT_XFAIL: \
362 ksft_test_result_xfail(fmt, ##__VA_ARGS__); \
363 break; \
364 case KSFT_XPASS: \
365 ksft_test_result_xpass(fmt, ##__VA_ARGS__); \
366 break; \
367 case KSFT_SKIP: \
368 ksft_test_result_skip(fmt, ##__VA_ARGS__); \
369 break; \
370 } } while (0)
371
372static inline __noreturn void ksft_exit_pass(void)
373{
374 ksft_print_cnts();
375 exit(KSFT_PASS);
376}
377
378static inline __noreturn void ksft_exit_fail(void)
379{
380 ksft_print_cnts();
381 exit(KSFT_FAIL);
382}
383
384/**
385 * ksft_exit() - Exit selftest based on truth of condition
386 *
387 * @condition: if true, exit self test with success, otherwise fail.
388 */
389#define ksft_exit(condition) do { \
390 if (!!(condition)) \
391 ksft_exit_pass(); \
392 else \
393 ksft_exit_fail(); \
394 } while (0)
395
396/**
397 * ksft_finished() - Exit selftest with success if all tests passed
398 */
399#define ksft_finished() \
400 ksft_exit(ksft_plan == \
401 ksft_cnt.ksft_pass + \
402 ksft_cnt.ksft_xpass + \
403 ksft_cnt.ksft_xfail + \
404 ksft_cnt.ksft_xskip)
405
406static inline __noreturn __printf(1, 2) void ksft_exit_fail_msg(const char *msg, ...)
407{
408 int saved_errno = errno;
409 va_list args;
410
411 va_start(args, msg);
412 printf("Bail out! ");
413 errno = saved_errno;
414 vprintf(msg, args);
415 va_end(args);
416
417 ksft_print_cnts();
418 exit(KSFT_FAIL);
419}
420
421static inline __noreturn void ksft_exit_fail_perror(const char *msg)
422{
423 ksft_exit_fail_msg("%s: %s (%d)\n", msg, strerror(errno), errno);
424}
425
426static inline __noreturn void ksft_exit_xfail(void)
427{
428 ksft_print_cnts();
429 exit(KSFT_XFAIL);
430}
431
432static inline __noreturn void ksft_exit_xpass(void)
433{
434 ksft_print_cnts();
435 exit(KSFT_XPASS);
436}
437
438static inline __noreturn __printf(1, 2) void ksft_exit_skip(const char *msg, ...)
439{
440 int saved_errno = errno;
441 va_list args;
442
443 va_start(args, msg);
444
445 /*
446 * FIXME: several tests misuse ksft_exit_skip so produce
447 * something sensible if some tests have already been run
448 * or a plan has been printed. Those tests should use
449 * ksft_test_result_skip or ksft_exit_fail_msg instead.
450 */
451 if (ksft_plan || ksft_test_num()) {
452 ksft_cnt.ksft_xskip++;
453 printf("ok %u # SKIP ", ksft_test_num());
454 } else {
455 printf("1..0 # SKIP ");
456 }
457 if (msg) {
458 errno = saved_errno;
459 vprintf(msg, args);
460 va_end(args);
461 }
462 if (ksft_test_num())
463 ksft_print_cnts();
464 exit(KSFT_SKIP);
465}
466
467static inline int ksft_min_kernel_version(unsigned int min_major,
468 unsigned int min_minor)
469{
470 unsigned int major, minor;
471 struct utsname info;
472
473 if (uname(&info) || sscanf(info.release, "%u.%u.", &major, &minor) != 2)
474 ksft_exit_fail_msg("Can't parse kernel version\n");
475
476 return major > min_major || (major == min_major && minor >= min_minor);
477}
478
479static inline void ksft_reset_state(void)
480{
481 ksft_cnt.ksft_pass = 0;
482 ksft_cnt.ksft_fail = 0;
483 ksft_cnt.ksft_xfail = 0;
484 ksft_cnt.ksft_xpass = 0;
485 ksft_cnt.ksft_xskip = 0;
486 ksft_cnt.ksft_error = 0;
487 ksft_plan = 0;
488}
489
490#endif /* __KSELFTEST_H */