1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * DAMON Debugfs Interface Unit Tests
4 *
5 * Author: SeongJae Park <sj@kernel.org>
6 */
7
8#ifdef CONFIG_DAMON_DBGFS_KUNIT_TEST
9
10#ifndef _DAMON_DBGFS_TEST_H
11#define _DAMON_DBGFS_TEST_H
12
13#include <kunit/test.h>
14
15static void damon_dbgfs_test_str_to_ints(struct kunit *test)
16{
17	char *question;
18	int *answers;
19	int expected[] = {12, 35, 46};
20	ssize_t nr_integers = 0, i;
21
22	question = "123";
23	answers = str_to_ints(question, strlen(question), &nr_integers);
24	KUNIT_EXPECT_EQ(test, (ssize_t)1, nr_integers);
25	KUNIT_EXPECT_EQ(test, 123, answers[0]);
26	kfree(answers);
27
28	question = "123abc";
29	answers = str_to_ints(question, strlen(question), &nr_integers);
30	KUNIT_EXPECT_EQ(test, (ssize_t)1, nr_integers);
31	KUNIT_EXPECT_EQ(test, 123, answers[0]);
32	kfree(answers);
33
34	question = "a123";
35	answers = str_to_ints(question, strlen(question), &nr_integers);
36	KUNIT_EXPECT_EQ(test, (ssize_t)0, nr_integers);
37	kfree(answers);
38
39	question = "12 35";
40	answers = str_to_ints(question, strlen(question), &nr_integers);
41	KUNIT_EXPECT_EQ(test, (ssize_t)2, nr_integers);
42	for (i = 0; i < nr_integers; i++)
43		KUNIT_EXPECT_EQ(test, expected[i], answers[i]);
44	kfree(answers);
45
46	question = "12 35 46";
47	answers = str_to_ints(question, strlen(question), &nr_integers);
48	KUNIT_EXPECT_EQ(test, (ssize_t)3, nr_integers);
49	for (i = 0; i < nr_integers; i++)
50		KUNIT_EXPECT_EQ(test, expected[i], answers[i]);
51	kfree(answers);
52
53	question = "12 35 abc 46";
54	answers = str_to_ints(question, strlen(question), &nr_integers);
55	KUNIT_EXPECT_EQ(test, (ssize_t)2, nr_integers);
56	for (i = 0; i < 2; i++)
57		KUNIT_EXPECT_EQ(test, expected[i], answers[i]);
58	kfree(answers);
59
60	question = "";
61	answers = str_to_ints(question, strlen(question), &nr_integers);
62	KUNIT_EXPECT_EQ(test, (ssize_t)0, nr_integers);
63	kfree(answers);
64
65	question = "\n";
66	answers = str_to_ints(question, strlen(question), &nr_integers);
67	KUNIT_EXPECT_EQ(test, (ssize_t)0, nr_integers);
68	kfree(answers);
69}
70
71static void damon_dbgfs_test_set_targets(struct kunit *test)
72{
73	struct damon_ctx *ctx = dbgfs_new_ctx();
74	char buf[64];
75
76	/* Make DAMON consider target has no pid */
77	damon_select_ops(ctx, DAMON_OPS_PADDR);
78
79	dbgfs_set_targets(ctx, 0, NULL);
80	sprint_target_ids(ctx, buf, 64);
81	KUNIT_EXPECT_STREQ(test, (char *)buf, "\n");
82
83	dbgfs_set_targets(ctx, 1, NULL);
84	sprint_target_ids(ctx, buf, 64);
85	KUNIT_EXPECT_STREQ(test, (char *)buf, "42\n");
86
87	dbgfs_set_targets(ctx, 0, NULL);
88	sprint_target_ids(ctx, buf, 64);
89	KUNIT_EXPECT_STREQ(test, (char *)buf, "\n");
90
91	dbgfs_destroy_ctx(ctx);
92}
93
94static void damon_dbgfs_test_set_init_regions(struct kunit *test)
95{
96	struct damon_ctx *ctx = damon_new_ctx();
97	/* Each line represents one region in ``<target idx> <start> <end>`` */
98	char * const valid_inputs[] = {"1 10 20\n 1   20 30\n1 35 45",
99		"1 10 20\n",
100		"1 10 20\n0 39 59\n0 70 134\n  1  20 25\n",
101		""};
102	/* Reading the file again will show sorted, clean output */
103	char * const valid_expects[] = {"1 10 20\n1 20 30\n1 35 45\n",
104		"1 10 20\n",
105		"0 39 59\n0 70 134\n1 10 20\n1 20 25\n",
106		""};
107	char * const invalid_inputs[] = {"3 10 20\n",	/* target not exists */
108		"1 10 20\n 1 14 26\n",		/* regions overlap */
109		"0 10 20\n1 30 40\n 0 5 8"};	/* not sorted by address */
110	char *input, *expect;
111	int i, rc;
112	char buf[256];
113
114	damon_select_ops(ctx, DAMON_OPS_PADDR);
115
116	dbgfs_set_targets(ctx, 3, NULL);
117
118	/* Put valid inputs and check the results */
119	for (i = 0; i < ARRAY_SIZE(valid_inputs); i++) {
120		input = valid_inputs[i];
121		expect = valid_expects[i];
122
123		rc = set_init_regions(ctx, input, strnlen(input, 256));
124		KUNIT_EXPECT_EQ(test, rc, 0);
125
126		memset(buf, 0, 256);
127		sprint_init_regions(ctx, buf, 256);
128
129		KUNIT_EXPECT_STREQ(test, (char *)buf, expect);
130	}
131	/* Put invalid inputs and check the return error code */
132	for (i = 0; i < ARRAY_SIZE(invalid_inputs); i++) {
133		input = invalid_inputs[i];
134		pr_info("input: %s\n", input);
135		rc = set_init_regions(ctx, input, strnlen(input, 256));
136		KUNIT_EXPECT_EQ(test, rc, -EINVAL);
137
138		memset(buf, 0, 256);
139		sprint_init_regions(ctx, buf, 256);
140
141		KUNIT_EXPECT_STREQ(test, (char *)buf, "");
142	}
143
144	dbgfs_set_targets(ctx, 0, NULL);
145	damon_destroy_ctx(ctx);
146}
147
148static struct kunit_case damon_test_cases[] = {
149	KUNIT_CASE(damon_dbgfs_test_str_to_ints),
150	KUNIT_CASE(damon_dbgfs_test_set_targets),
151	KUNIT_CASE(damon_dbgfs_test_set_init_regions),
152	{},
153};
154
155static struct kunit_suite damon_test_suite = {
156	.name = "damon-dbgfs",
157	.test_cases = damon_test_cases,
158};
159kunit_test_suite(damon_test_suite);
160
161#endif /* _DAMON_TEST_H */
162
163#endif	/* CONFIG_DAMON_KUNIT_TEST */
164