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selftests/bpf: Add cookies check for tracing fill_link_info test

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Adding tests for getting cookie with fill_link_info for tracing.

Signed-off-by: Tao Chen <chen.dylane@linux.dev>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20250606165818.3394397-2-chen.dylane@linux.dev
This commit is contained in:
Tao Chen 2025-06-07 00:58:15 +08:00 • committed by Andrii Nakryiko
parent c7beb48344
commit d77efc0ef5
1 changed files with 23 additions and 1 deletions
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24
tools/testing/selftests/bpf/prog_tests/bpf_cookie.c
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@ -489,10 +489,28 @@ cleanup:
bpf_link__destroy(link);
}
static int verify_tracing_link_info(int fd, u64 cookie)
{
struct bpf_link_info info;
int err;
u32 len = sizeof(info);
err = bpf_link_get_info_by_fd(fd, &info, &len);
if (!ASSERT_OK(err, "get_link_info"))
return -1;
if (!ASSERT_EQ(info.type, BPF_LINK_TYPE_TRACING, "link_type"))
return -1;
ASSERT_EQ(info.tracing.cookie, cookie, "tracing_cookie");
return 0;
}
static void tracing_subtest(struct test_bpf_cookie *skel)
{
__u64 cookie;
int prog_fd;
int prog_fd, err;
int fentry_fd = -1, fexit_fd = -1, fmod_ret_fd = -1;
LIBBPF_OPTS(bpf_test_run_opts, opts);
LIBBPF_OPTS(bpf_link_create_opts, link_opts);
@ -507,6 +525,10 @@ static void tracing_subtest(struct test_bpf_cookie *skel)
if (!ASSERT_GE(fentry_fd, 0, "fentry.link_create"))
goto cleanup;
err = verify_tracing_link_info(fentry_fd, cookie);
if (!ASSERT_OK(err, "verify_tracing_link_info"))
goto cleanup;
cookie = 0x20000000000000L;
prog_fd = bpf_program__fd(skel->progs.fexit_test1);
link_opts.tracing.cookie = cookie;