diff options
| author | Jiri Olsa <jolsa@kernel.org> | 2024-01-19 12:05:03 +0100 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2024-01-23 16:05:28 -0800 |
| commit | b7896486688af36e3bc5e27a6d5369cc5dcbcf69 (patch) | |
| tree | fc35b13c4c2420472d3cfba90a888fdf688fec64 /tools | |
| parent | d74179708473c649c653f1db280e29875a532e99 (diff) | |
selftests/bpf: Add fill_link_info test for perf event
Adding fill_link_info test for perf event and testing we
get its values back through the bpf_link_info interface.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20240119110505.400573-7-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/fill_link_info.c | 40 | ||||
| -rw-r--r-- | tools/testing/selftests/bpf/progs/test_fill_link_info.c | 6 |
2 files changed, 46 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/fill_link_info.c b/tools/testing/selftests/bpf/prog_tests/fill_link_info.c index 20e105001bc3..f3932941bbaa 100644 --- a/tools/testing/selftests/bpf/prog_tests/fill_link_info.c +++ b/tools/testing/selftests/bpf/prog_tests/fill_link_info.c @@ -109,6 +109,11 @@ again: strlen(UPROBE_FILE)); ASSERT_EQ(err, 0, "cmp_file_name"); break; + case BPF_PERF_EVENT_EVENT: + ASSERT_EQ(info.perf_event.event.type, PERF_TYPE_SOFTWARE, "event_type"); + ASSERT_EQ(info.perf_event.event.config, PERF_COUNT_SW_PAGE_FAULTS, "event_config"); + ASSERT_EQ(info.perf_event.event.cookie, PERF_EVENT_COOKIE, "event_cookie"); + break; default: err = -1; break; @@ -189,6 +194,39 @@ static void test_tp_fill_link_info(struct test_fill_link_info *skel) bpf_link__destroy(link); } +static void test_event_fill_link_info(struct test_fill_link_info *skel) +{ + DECLARE_LIBBPF_OPTS(bpf_perf_event_opts, opts, + .bpf_cookie = PERF_EVENT_COOKIE, + ); + struct bpf_link *link; + int link_fd, err, pfd; + struct perf_event_attr attr = { + .type = PERF_TYPE_SOFTWARE, + .config = PERF_COUNT_SW_PAGE_FAULTS, + .freq = 1, + .sample_freq = 1, + .size = sizeof(struct perf_event_attr), + }; + + pfd = syscall(__NR_perf_event_open, &attr, -1 /* pid */, 0 /* cpu 0 */, + -1 /* group id */, 0 /* flags */); + if (!ASSERT_GE(pfd, 0, "perf_event_open")) + return; + + link = bpf_program__attach_perf_event_opts(skel->progs.event_run, pfd, &opts); + if (!ASSERT_OK_PTR(link, "attach_event")) + goto error; + + link_fd = bpf_link__fd(link); + err = verify_perf_link_info(link_fd, BPF_PERF_EVENT_EVENT, 0, 0, 0); + ASSERT_OK(err, "verify_perf_link_info"); + bpf_link__destroy(link); + +error: + close(pfd); +} + static void test_uprobe_fill_link_info(struct test_fill_link_info *skel, enum bpf_perf_event_type type) { @@ -549,6 +587,8 @@ void test_fill_link_info(void) test_kprobe_fill_link_info(skel, BPF_PERF_EVENT_KPROBE, true); if (test__start_subtest("tracepoint_link_info")) test_tp_fill_link_info(skel); + if (test__start_subtest("event_link_info")) + test_event_fill_link_info(skel); uprobe_offset = get_uprobe_offset(&uprobe_func); if (test__start_subtest("uprobe_link_info")) diff --git a/tools/testing/selftests/bpf/progs/test_fill_link_info.c b/tools/testing/selftests/bpf/progs/test_fill_link_info.c index 69509f8bb680..6afa834756e9 100644 --- a/tools/testing/selftests/bpf/progs/test_fill_link_info.c +++ b/tools/testing/selftests/bpf/progs/test_fill_link_info.c @@ -33,6 +33,12 @@ int BPF_PROG(tp_run) return 0; } +SEC("perf_event") +int event_run(void *ctx) +{ + return 0; +} + SEC("kprobe.multi") int BPF_PROG(kmulti_run) { |