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
15 static 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
71 static 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
94 static 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
148 static 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
155 static struct kunit_suite damon_test_suite = {
156 .name = "damon-dbgfs",
157 .test_cases = damon_test_cases,
158 };
159 kunit_test_suite(damon_test_suite);
160
161 #endif /* _DAMON_TEST_H */
162
163 #endif /* CONFIG_DAMON_KUNIT_TEST */
164
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