linux-kernel - [PATCH bpf-next v2 2/3] selftests/bpf: Add cookies check for raw_tp fill_link

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Message-Id: <20250603022610.3005963-2-chen.dylane@linux.dev>
Date: Tue,  3 Jun 2025 10:26:09 +0800
From: Tao Chen <chen.dylane@...ux.dev>
To: ast@...nel.org,
	daniel@...earbox.net,
	andrii@...nel.org,
	martin.lau@...ux.dev,
	eddyz87@...il.com,
	song@...nel.org,
	yonghong.song@...ux.dev,
	john.fastabend@...il.com,
	kpsingh@...nel.org,
	sdf@...ichev.me,
	qmo@...nel.org,
	jolsa@...nel.org
Cc: bpf@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Tao Chen <chen.dylane@...ux.dev>
Subject: [PATCH bpf-next v2 2/3] selftests/bpf: Add cookies check for raw_tp fill_link_info test

Adding tests for getting cookie with fill_link_info for raw_tp.

Signed-off-by: Tao Chen <chen.dylane@...ux.dev>
---
 .../selftests/bpf/prog_tests/bpf_cookie.c     | 26 ++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_cookie.c b/tools/testing/selftests/bpf/prog_tests/bpf_cookie.c
index 6befa87043..0774ae6c1b 100644
--- a/tools/testing/selftests/bpf/prog_tests/bpf_cookie.c
+++ b/tools/testing/selftests/bpf/prog_tests/bpf_cookie.c
@@ -635,10 +635,29 @@ static void tp_btf_subtest(struct test_bpf_cookie *skel)
 	bpf_link__destroy(link);
 }
 
+static int verify_raw_tp_link_info(int fd, u64 cookie)
+{
+	struct bpf_link_info info;
+	int err;
+	u32 len = sizeof(info);
+
+	memset(&info, 0, 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_RAW_TRACEPOINT, "link_type"))
+		return -1;
+
+	ASSERT_EQ(info.raw_tracepoint.cookie, cookie, "raw_tp_cookie");
+
+	return 0;
+}
+
 static void raw_tp_subtest(struct test_bpf_cookie *skel)
 {
 	__u64 cookie;
-	int prog_fd, link_fd = -1;
+	int err, prog_fd, link_fd = -1;
 	struct bpf_link *link = NULL;
 	LIBBPF_OPTS(bpf_raw_tp_opts, raw_tp_opts);
 	LIBBPF_OPTS(bpf_raw_tracepoint_opts, opts);
@@ -656,6 +675,11 @@ static void raw_tp_subtest(struct test_bpf_cookie *skel)
 		goto cleanup;
 
 	usleep(1); /* trigger */
+
+	err = verify_raw_tp_link_info(link_fd, cookie);
+	if (!ASSERT_OK(err, "verify_raw_tp_link_info"))
+		goto cleanup;
+
 	close(link_fd); /* detach */
 	link_fd = -1;
 
-- 
2.43.0