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| author | Daniel Müller <deso@posteo.net> | 2022-05-23 23:04:24 +0000 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2022-06-02 16:26:28 -0700 |
| commit | 0b27b3d9fdf88c132b095a30ee2c61cd6e56e6cc (patch) | |
| tree | 2b7824110c83f617466e47fc9cb56249fc60a347 /tools/testing/selftests/bpf/prog_tests/libbpf_str.c | |
| parent | ccde5760bac1b83cfb2bfed97748b71829cbe5d8 (diff) | |
| download | lwn-0b27b3d9fdf88c132b095a30ee2c61cd6e56e6cc.tar.gz lwn-0b27b3d9fdf88c132b095a30ee2c61cd6e56e6cc.zip | |
selftests/bpf: Add test for libbpf_bpf_attach_type_str
This change adds a test for libbpf_bpf_attach_type_str. The test
retrieves all variants of the bpf_attach_type enumeration using BTF and
makes sure that the function under test works as expected for them.
Signed-off-by: Daniel Müller <deso@posteo.net>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Quentin Monnet <quentin@isovalent.com>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20220523230428.3077108-9-deso@posteo.net
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/libbpf_str.c')
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/libbpf_str.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/libbpf_str.c b/tools/testing/selftests/bpf/prog_tests/libbpf_str.c index f5185a46ee00..c88df92868c1 100644 --- a/tools/testing/selftests/bpf/prog_tests/libbpf_str.c +++ b/tools/testing/selftests/bpf/prog_tests/libbpf_str.c @@ -15,6 +15,51 @@ static void uppercase(char *s) } /* + * Test case to check that all bpf_attach_type variants are covered by + * libbpf_bpf_attach_type_str. + */ +static void test_libbpf_bpf_attach_type_str(void) +{ + struct btf *btf; + const struct btf_type *t; + const struct btf_enum *e; + int i, n, id; + + btf = btf__parse("/sys/kernel/btf/vmlinux", NULL); + if (!ASSERT_OK_PTR(btf, "btf_parse")) + return; + + /* find enum bpf_attach_type and enumerate each value */ + id = btf__find_by_name_kind(btf, "bpf_attach_type", BTF_KIND_ENUM); + if (!ASSERT_GT(id, 0, "bpf_attach_type_id")) + goto cleanup; + t = btf__type_by_id(btf, id); + e = btf_enum(t); + n = btf_vlen(t); + for (i = 0; i < n; e++, i++) { + enum bpf_attach_type attach_type = (enum bpf_attach_type)e->val; + const char *attach_type_name; + const char *attach_type_str; + char buf[256]; + + if (attach_type == __MAX_BPF_ATTACH_TYPE) + continue; + + attach_type_name = btf__str_by_offset(btf, e->name_off); + attach_type_str = libbpf_bpf_attach_type_str(attach_type); + ASSERT_OK_PTR(attach_type_str, attach_type_name); + + snprintf(buf, sizeof(buf), "BPF_%s", attach_type_str); + uppercase(buf); + + ASSERT_STREQ(buf, attach_type_name, "exp_str_value"); + } + +cleanup: + btf__free(btf); +} + +/* * Test case to check that all bpf_map_type variants are covered by * libbpf_bpf_map_type_str. */ @@ -103,6 +148,9 @@ cleanup: */ void test_libbpf_str(void) { + if (test__start_subtest("bpf_attach_type_str")) + test_libbpf_bpf_attach_type_str(); + if (test__start_subtest("bpf_map_type_str")) test_libbpf_bpf_map_type_str(); |