1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */
3
4 #include <ctype.h>
5 #include <test_progs.h>
6 #include <bpf/btf.h>
7
8 /*
9 * Utility function uppercasing an entire string.
10 */
11 static void uppercase(char *s)
12 {
13 for (; *s != '\0'; s++)
14 *s = toupper(*s);
15 }
16
17 /*
18 * Test case to check that all bpf_attach_type variants are covered by
19 * libbpf_bpf_attach_type_str.
20 */
21 static void test_libbpf_bpf_attach_type_str(void)
22 {
23 struct btf *btf;
24 const struct btf_type *t;
25 const struct btf_enum *e;
26 int i, n, id;
27
28 btf = btf__parse("/sys/kernel/btf/vmlinux", NULL);
29 if (!ASSERT_OK_PTR(btf, "btf_parse"))
30 return;
31
32 /* find enum bpf_attach_type and enumerate each value */
33 id = btf__find_by_name_kind(btf, "bpf_attach_type", BTF_KIND_ENUM);
34 if (!ASSERT_GT(id, 0, "bpf_attach_type_id"))
35 goto cleanup;
36 t = btf__type_by_id(btf, id);
37 e = btf_enum(t);
38 n = btf_vlen(t);
39 for (i = 0; i < n; e++, i++) {
40 enum bpf_attach_type attach_type = (enum bpf_attach_type)e->val;
41 const char *attach_type_name;
42 const char *attach_type_str;
43 char buf[256];
44
45 if (attach_type == __MAX_BPF_ATTACH_TYPE)
46 continue;
47
48 attach_type_name = btf__str_by_offset(btf, e->name_off);
49 attach_type_str = libbpf_bpf_attach_type_str(attach_type);
50 ASSERT_OK_PTR(attach_type_str, attach_type_name);
51
52 snprintf(buf, sizeof(buf), "BPF_%s", attach_type_str);
53 uppercase(buf);
54
55 ASSERT_STREQ(buf, attach_type_name, "exp_str_value");
56 }
57
58 cleanup:
59 btf__free(btf);
60 }
61
62 /*
63 * Test case to check that all bpf_link_type variants are covered by
64 * libbpf_bpf_link_type_str.
65 */
66 static void test_libbpf_bpf_link_type_str(void)
67 {
68 struct btf *btf;
69 const struct btf_type *t;
70 const struct btf_enum *e;
71 int i, n, id;
72
73 btf = btf__parse("/sys/kernel/btf/vmlinux", NULL);
74 if (!ASSERT_OK_PTR(btf, "btf_parse"))
75 return;
76
77 /* find enum bpf_link_type and enumerate each value */
78 id = btf__find_by_name_kind(btf, "bpf_link_type", BTF_KIND_ENUM);
79 if (!ASSERT_GT(id, 0, "bpf_link_type_id"))
80 goto cleanup;
81 t = btf__type_by_id(btf, id);
82 e = btf_enum(t);
83 n = btf_vlen(t);
84 for (i = 0; i < n; e++, i++) {
85 enum bpf_link_type link_type = (enum bpf_link_type)e->val;
86 const char *link_type_name;
87 const char *link_type_str;
88 char buf[256];
89
90 if (link_type == __MAX_BPF_LINK_TYPE)
91 continue;
92
93 link_type_name = btf__str_by_offset(btf, e->name_off);
94 link_type_str = libbpf_bpf_link_type_str(link_type);
95 ASSERT_OK_PTR(link_type_str, link_type_name);
96
97 snprintf(buf, sizeof(buf), "BPF_LINK_TYPE_%s", link_type_str);
98 uppercase(buf);
99
100 ASSERT_STREQ(buf, link_type_name, "exp_str_value");
101 }
102
103 cleanup:
104 btf__free(btf);
105 }
106
107 /*
108 * Test case to check that all bpf_map_type variants are covered by
109 * libbpf_bpf_map_type_str.
110 */
111 static void test_libbpf_bpf_map_type_str(void)
112 {
113 struct btf *btf;
114 const struct btf_type *t;
115 const struct btf_enum *e;
116 int i, n, id;
117
118 btf = btf__parse("/sys/kernel/btf/vmlinux", NULL);
119 if (!ASSERT_OK_PTR(btf, "btf_parse"))
120 return;
121
122 /* find enum bpf_map_type and enumerate each value */
123 id = btf__find_by_name_kind(btf, "bpf_map_type", BTF_KIND_ENUM);
124 if (!ASSERT_GT(id, 0, "bpf_map_type_id"))
125 goto cleanup;
126 t = btf__type_by_id(btf, id);
127 e = btf_enum(t);
128 n = btf_vlen(t);
129 for (i = 0; i < n; e++, i++) {
130 enum bpf_map_type map_type = (enum bpf_map_type)e->val;
131 const char *map_type_name;
132 const char *map_type_str;
133 char buf[256];
134
135 if (map_type == __MAX_BPF_MAP_TYPE)
136 continue;
137
138 map_type_name = btf__str_by_offset(btf, e->name_off);
139 map_type_str = libbpf_bpf_map_type_str(map_type);
140 ASSERT_OK_PTR(map_type_str, map_type_name);
141
142 snprintf(buf, sizeof(buf), "BPF_MAP_TYPE_%s", map_type_str);
143 uppercase(buf);
144
145 /* Special case for map_type_name BPF_MAP_TYPE_CGROUP_STORAGE_DEPRECATED
146 * where it and BPF_MAP_TYPE_CGROUP_STORAGE have the same enum value
147 * (map_type). For this enum value, libbpf_bpf_map_type_str() picks
148 * BPF_MAP_TYPE_CGROUP_STORAGE. The same for
149 * BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE_DEPRECATED and
150 * BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE.
151 */
152 if (strcmp(map_type_name, "BPF_MAP_TYPE_CGROUP_STORAGE_DEPRECATED") == 0)
153 continue;
154 if (strcmp(map_type_name, "BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE_DEPRECATED") == 0)
155 continue;
156
157 ASSERT_STREQ(buf, map_type_name, "exp_str_value");
158 }
159
160 cleanup:
161 btf__free(btf);
162 }
163
164 /*
165 * Test case to check that all bpf_prog_type variants are covered by
166 * libbpf_bpf_prog_type_str.
167 */
168 static void test_libbpf_bpf_prog_type_str(void)
169 {
170 struct btf *btf;
171 const struct btf_type *t;
172 const struct btf_enum *e;
173 int i, n, id;
174
175 btf = btf__parse("/sys/kernel/btf/vmlinux", NULL);
176 if (!ASSERT_OK_PTR(btf, "btf_parse"))
177 return;
178
179 /* find enum bpf_prog_type and enumerate each value */
180 id = btf__find_by_name_kind(btf, "bpf_prog_type", BTF_KIND_ENUM);
181 if (!ASSERT_GT(id, 0, "bpf_prog_type_id"))
182 goto cleanup;
183 t = btf__type_by_id(btf, id);
184 e = btf_enum(t);
185 n = btf_vlen(t);
186 for (i = 0; i < n; e++, i++) {
187 enum bpf_prog_type prog_type = (enum bpf_prog_type)e->val;
188 const char *prog_type_name;
189 const char *prog_type_str;
190 char buf[256];
191
192 if (prog_type == __MAX_BPF_PROG_TYPE)
193 continue;
194
195 prog_type_name = btf__str_by_offset(btf, e->name_off);
196 prog_type_str = libbpf_bpf_prog_type_str(prog_type);
197 ASSERT_OK_PTR(prog_type_str, prog_type_name);
198
199 snprintf(buf, sizeof(buf), "BPF_PROG_TYPE_%s", prog_type_str);
200 uppercase(buf);
201
202 ASSERT_STREQ(buf, prog_type_name, "exp_str_value");
203 }
204
205 cleanup:
206 btf__free(btf);
207 }
208
209 /*
210 * Run all libbpf str conversion tests.
211 */
212 void test_libbpf_str(void)
213 {
214 if (test__start_subtest("bpf_attach_type_str"))
215 test_libbpf_bpf_attach_type_str();
216
217 if (test__start_subtest("bpf_link_type_str"))
218 test_libbpf_bpf_link_type_str();
219
220 if (test__start_subtest("bpf_map_type_str"))
221 test_libbpf_bpf_map_type_str();
222
223 if (test__start_subtest("bpf_prog_type_str"))
224 test_libbpf_bpf_prog_type_str();
225 }
226
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