summaryrefslogtreecommitdiff
path: root/lib/kunit/executor.c
blob: 74982b83707ca97b7b43fd9565db85f1fd482b32 (plain)
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
// SPDX-License-Identifier: GPL-2.0

#include <linux/reboot.h>
#include <kunit/test.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[];

#if IS_BUILTIN(CONFIG_KUNIT)

static char *filter_glob_param;
static char *action_param;

module_param_named(filter_glob, filter_glob_param, charp, 0);
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(action, action_param, charp, 0);
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");

/* glob_match() needs NULL terminated strings, so we need a copy of filter_glob_param. */
struct kunit_test_filter {
	char *suite_glob;
	char *test_glob;
};

/* Split "suite_glob.test_glob" into two. Assumes filter_glob is not empty. */
static void kunit_parse_filter_glob(struct kunit_test_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);
		parsed->test_glob = NULL;
		strcpy(parsed->suite_glob, filter_glob);
		return;
	}

	parsed->suite_glob = kzalloc(period - filter_glob + 1, GFP_KERNEL);
	parsed->test_glob = kzalloc(len - (period - filter_glob) + 1, GFP_KERNEL);

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

/* Create a copy of suite with only tests that match test_glob. */
static struct kunit_suite *
kunit_filter_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;
}

static char *kunit_shutdown;
core_param(kunit_shutdown, kunit_shutdown, charp, 0644);

/* Stores an array of suites, end points one past the end */
struct suite_set {
	struct kunit_suite * const *start;
	struct kunit_suite * const *end;
};

static void kunit_free_suite_set(struct suite_set suite_set)
{
	struct kunit_suite * const *suites;

	for (suites = suite_set.start; suites < suite_set.end; suites++)
		kfree(*suites);
	kfree(suite_set.start);
}

static struct suite_set kunit_filter_suites(const struct suite_set *suite_set,
					    const char *filter_glob,
					    int *err)
{
	int i;
	struct kunit_suite **copy, *filtered_suite;
	struct suite_set filtered;
	struct kunit_test_filter filter;

	const size_t max = suite_set->end - suite_set->start;

	copy = kmalloc_array(max, sizeof(*filtered.start), GFP_KERNEL);
	filtered.start = copy;
	if (!copy) { /* won't be able to run anything, return an empty set */
		filtered.end = copy;
		return filtered;
	}

	kunit_parse_filter_glob(&filter, filter_glob);

	for (i = 0; &suite_set->start[i] != suite_set->end; i++) {
		if (!glob_match(filter.suite_glob, suite_set->start[i]->name))
			continue;

		filtered_suite = kunit_filter_tests(suite_set->start[i], filter.test_glob);
		if (IS_ERR(filtered_suite)) {
			*err = PTR_ERR(filtered_suite);
			return filtered;
		}
		if (!filtered_suite)
			continue;

		*copy++ = filtered_suite;
	}
	filtered.end = copy;

	kfree(filter.suite_glob);
	kfree(filter.test_glob);
	return filtered;
}

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);

}

static void kunit_exec_run_tests(struct suite_set *suite_set)
{
	size_t num_suites = suite_set->end - suite_set->start;

	pr_info("KTAP version 1\n");
	pr_info("1..%zu\n", num_suites);

	__kunit_test_suites_init(suite_set->start, num_suites);
}

static void kunit_exec_list_tests(struct suite_set *suite_set)
{
	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++)
		kunit_suite_for_each_test_case((*suites), test_case) {
			pr_info("%s.%s\n", (*suites)->name, test_case->name);
		}
}

int kunit_run_all_tests(void)
{
	struct suite_set suite_set = {__kunit_suites_start, __kunit_suites_end};
	int err = 0;
	if (!kunit_enabled()) {
		pr_info("kunit: disabled\n");
		goto out;
	}

	if (filter_glob_param) {
		suite_set = kunit_filter_suites(&suite_set, filter_glob_param, &err);
		if (err) {
			pr_err("kunit executor: error filtering suites: %d\n", err);
			goto out;
		}
	}

	if (!action_param)
		kunit_exec_run_tests(&suite_set);
	else if (strcmp(action_param, "list") == 0)
		kunit_exec_list_tests(&suite_set);
	else
		pr_err("kunit executor: unknown action '%s'\n", action_param);

	if (filter_glob_param) { /* a copy was made of each suite */
		kunit_free_suite_set(suite_set);
	}

out:
	kunit_handle_shutdown();
	return err;
}

#if IS_BUILTIN(CONFIG_KUNIT_TEST)
#include "executor_test.c"
#endif

#endif /* IS_BUILTIN(CONFIG_KUNIT) */