1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright (c) 2021 Facebook */
3
4 #include <test_progs.h>
5 #include <bpf/btf.h>
6
7 void test_libbpf_probe_prog_types(void)
8 {
9 struct btf *btf;
10 const struct btf_type *t;
11 const struct btf_enum *e;
12 int i, n, id;
13
14 btf = btf__parse("/sys/kernel/btf/vmlinux", NULL);
15 if (!ASSERT_OK_PTR(btf, "btf_parse"))
16 return;
17
18 /* find enum bpf_prog_type and enumerate each value */
19 id = btf__find_by_name_kind(btf, "bpf_prog_type", BTF_KIND_ENUM);
20 if (!ASSERT_GT(id, 0, "bpf_prog_type_id"))
21 goto cleanup;
22 t = btf__type_by_id(btf, id);
23 if (!ASSERT_OK_PTR(t, "bpf_prog_type_enum"))
24 goto cleanup;
25
26 for (e = btf_enum(t), i = 0, n = btf_vlen(t); i < n; e++, i++) {
27 const char *prog_type_name = btf__str_by_offset(btf, e->name_off);
28 enum bpf_prog_type prog_type = (enum bpf_prog_type)e->val;
29 int res;
30
31 if (prog_type == BPF_PROG_TYPE_UNSPEC)
32 continue;
33 if (strcmp(prog_type_name, "__MAX_BPF_PROG_TYPE") == 0)
34 continue;
35
36 if (!test__start_subtest(prog_type_name))
37 continue;
38
39 res = libbpf_probe_bpf_prog_type(prog_type, NULL);
40 ASSERT_EQ(res, 1, prog_type_name);
41 }
42
43 cleanup:
44 btf__free(btf);
45 }
46
47 void test_libbpf_probe_map_types(void)
48 {
49 struct btf *btf;
50 const struct btf_type *t;
51 const struct btf_enum *e;
52 int i, n, id;
53
54 btf = btf__parse("/sys/kernel/btf/vmlinux", NULL);
55 if (!ASSERT_OK_PTR(btf, "btf_parse"))
56 return;
57
58 /* find enum bpf_map_type and enumerate each value */
59 id = btf__find_by_name_kind(btf, "bpf_map_type", BTF_KIND_ENUM);
60 if (!ASSERT_GT(id, 0, "bpf_map_type_id"))
61 goto cleanup;
62 t = btf__type_by_id(btf, id);
63 if (!ASSERT_OK_PTR(t, "bpf_map_type_enum"))
64 goto cleanup;
65
66 for (e = btf_enum(t), i = 0, n = btf_vlen(t); i < n; e++, i++) {
67 const char *map_type_name = btf__str_by_offset(btf, e->name_off);
68 enum bpf_map_type map_type = (enum bpf_map_type)e->val;
69 int res;
70
71 if (map_type == BPF_MAP_TYPE_UNSPEC)
72 continue;
73 if (strcmp(map_type_name, "__MAX_BPF_MAP_TYPE") == 0)
74 continue;
75
76 if (!test__start_subtest(map_type_name))
77 continue;
78
79 res = libbpf_probe_bpf_map_type(map_type, NULL);
80 ASSERT_EQ(res, 1, map_type_name);
81 }
82
83 cleanup:
84 btf__free(btf);
85 }
86
87 void test_libbpf_probe_helpers(void)
88 {
89 #define CASE(prog, helper, supp) { \
90 .prog_type_name = "BPF_PROG_TYPE_" # prog, \
91 .helper_name = "bpf_" # helper, \
92 .prog_type = BPF_PROG_TYPE_ ## prog, \
93 .helper_id = BPF_FUNC_ ## helper, \
94 .supported = supp, \
95 }
96 const struct case_def {
97 const char *prog_type_name;
98 const char *helper_name;
99 enum bpf_prog_type prog_type;
100 enum bpf_func_id helper_id;
101 bool supported;
102 } cases[] = {
103 CASE(KPROBE, unspec, false),
104 CASE(KPROBE, map_lookup_elem, true),
105 CASE(KPROBE, loop, true),
106
107 CASE(KPROBE, ktime_get_coarse_ns, false),
108 CASE(SOCKET_FILTER, ktime_get_coarse_ns, true),
109
110 CASE(KPROBE, sys_bpf, false),
111 CASE(SYSCALL, sys_bpf, true),
112 };
113 size_t case_cnt = ARRAY_SIZE(cases), i;
114 char buf[128];
115
116 for (i = 0; i < case_cnt; i++) {
117 const struct case_def *d = &cases[i];
118 int res;
119
120 snprintf(buf, sizeof(buf), "%s+%s", d->prog_type_name, d->helper_name);
121
122 if (!test__start_subtest(buf))
123 continue;
124
125 res = libbpf_probe_bpf_helper(d->prog_type, d->helper_id, NULL);
126 ASSERT_EQ(res, d->supported, buf);
127 }
128 }
129
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