[PATCH bpf-next 16/17] selftests/bpf: Add tracing multi attach fails test
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STALE167d
From: Jiri Olsa <jolsa@kernel.org>
Date: 2026-02-20 10:10:33
Also in:
bpf
Subsystem:
bpf [general] (safe dynamic programs and tools), bpf [selftests] (test runners & infrastructure), kernel selftest framework, the rest · Maintainers:
Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Shuah Khan, Shuah Khan, Linus Torvalds
Adding tests for attach fails on tracing multi link. Signed-off-by: Jiri Olsa <jolsa@kernel.org> --- .../selftests/bpf/prog_tests/tracing_multi.c | 56 +++++++++++++++++++ 1 file changed, 56 insertions(+)
diff --git a/tools/testing/selftests/bpf/prog_tests/tracing_multi.c b/tools/testing/selftests/bpf/prog_tests/tracing_multi.c
index 3d9327b80e88..ba86a88844e6 100644
--- a/tools/testing/selftests/bpf/prog_tests/tracing_multi.c
+++ b/tools/testing/selftests/bpf/prog_tests/tracing_multi.c@@ -340,6 +340,60 @@ static void test_session(void) tracing_multi_session__destroy(skel); } +static void test_attach_api_fails(void) +{ + LIBBPF_OPTS(bpf_tracing_multi_opts, opts); + struct tracing_multi *skel = NULL; + __u64 cookies[2]; + __u32 ids[2]; + + skel = tracing_multi__open_and_load(); + if (!ASSERT_OK_PTR(skel, "tracing_multi__open_and_load")) + return; + + /* fail#1 pattern and opts NULL */ + skel->links.test_fentry = bpf_program__attach_tracing_multi(skel->progs.test_fentry, + NULL, NULL); + if (!ASSERT_ERR_PTR(skel->links.test_fentry, "bpf_program__attach_tracing_multi")) + goto cleanup; + + /* fail#2 pattern and ids */ + opts.ids = ids; + opts.cnt = 2; + + skel->links.test_fentry = bpf_program__attach_tracing_multi(skel->progs.test_fentry, + "bpf_fentry_test*", &opts); + if (!ASSERT_ERR_PTR(skel->links.test_fentry, "bpf_program__attach_tracing_multi")) + goto cleanup; + + /* fail#3 pattern and cookies */ + opts.ids = NULL; + opts.cnt = 2; + opts.cookies = cookies; + + skel->links.test_fentry = bpf_program__attach_tracing_multi(skel->progs.test_fentry, + "bpf_fentry_test*", &opts); + if (!ASSERT_ERR_PTR(skel->links.test_fentry, "bpf_program__attach_tracing_multi")) + goto cleanup; + + /* fail#4 bogus pattern */ + skel->links.test_fentry = bpf_program__attach_tracing_multi(skel->progs.test_fentry, + "bpf_not_really_a_function*", NULL); + if (!ASSERT_ERR_PTR(skel->links.test_fentry, "bpf_program__attach_tracing_multi")) + goto cleanup; + + /* fail#5 abnormal cnt */ + opts.ids = ids; + opts.cnt = INT_MAX; + + skel->links.test_fentry = bpf_program__attach_tracing_multi(skel->progs.test_fentry, + NULL, &opts); + ASSERT_ERR_PTR(skel->links.test_fentry, "bpf_program__attach_tracing_multi"); + +cleanup: + tracing_multi__destroy(skel); +} + void test_tracing_multi_test(void) { #ifndef __x86_64__
@@ -359,4 +413,6 @@ void test_tracing_multi_test(void) test_link_api_ids(true); if (test__start_subtest("session")) test_session(); + if (test__start_subtest("attach_api_fails")) + test_attach_api_fails(); }
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2.52.0