Linux Audio

Check our new training course

Embedded Linux Audio

Check our new training course
with Creative Commons CC-BY-SA
lecture materials

Bootlin logo

Elixir Cross Referencer

Loading...
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
// 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 int len = strlen(filter_glob);
	const char *period = strchr(filter_glob, '.');

	if (!period) {
		parsed->suite_glob = kzalloc(len + 1, GFP_KERNEL);
		if (!parsed->suite_glob)
			return -ENOMEM;

		parsed->test_glob = NULL;
		strcpy(parsed->suite_glob, filter_glob);
		return 0;
	}

	parsed->suite_glob = kzalloc(period - filter_glob + 1, GFP_KERNEL);
	if (!parsed->suite_glob)
		return -ENOMEM;

	parsed->test_glob = kzalloc(len - (period - filter_glob) + 1, GFP_KERNEL);
	if (!parsed->test_glob) {
		kfree(parsed->suite_glob);
		return -ENOMEM;
	}

	strncpy(parsed->suite_glob, filter_glob, period - filter_glob);
	strncpy(parsed->test_glob, period + 1, len - (period - filter_glob));

	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) */