linux-kernel - [PATCH bpf-next v3 7/7] selftests/bpf: test fsession mixed with fentry and fexit

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Message-ID: <20251026030143.23807-8-dongml2@chinatelecom.cn>
Date: Sun, 26 Oct 2025 11:01:43 +0800
From: Menglong Dong <menglong8.dong@...il.com>
To: ast@...nel.org,
	jolsa@...nel.org
Cc: daniel@...earbox.net,
	john.fastabend@...il.com,
	andrii@...nel.org,
	martin.lau@...ux.dev,
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	leon.hwang@...ux.dev,
	jiang.biao@...ux.dev,
	bpf@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org
Subject: [PATCH bpf-next v3 7/7] selftests/bpf: test fsession mixed with fentry and fexit

Test the fsession when it is used together with fentry, fexit.

Signed-off-by: Menglong Dong <dongml2@...natelecom.cn>
---
 .../selftests/bpf/progs/fsession_test.c       | 34 +++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/tools/testing/selftests/bpf/progs/fsession_test.c b/tools/testing/selftests/bpf/progs/fsession_test.c
index 8f266d8e4b55..f78348e541a4 100644
--- a/tools/testing/selftests/bpf/progs/fsession_test.c
+++ b/tools/testing/selftests/bpf/progs/fsession_test.c
@@ -228,3 +228,37 @@ int BPF_PROG(test12, int a)
 		test12_exit_ok = *cookie == 0x1111222233334444ull;
 	return 0;
 }
+
+__u64 test13_entry_result = 0;
+__u64 test13_exit_result = 0;
+
+SEC("fsession/bpf_fentry_test1")
+int BPF_PROG(test13, int a, int ret)
+{
+	__u64 *cookie = bpf_fsession_cookie(ctx);
+
+	if (!bpf_tracing_is_exit(ctx)) {
+		test13_entry_result = a == 1 && ret == 0;
+		*cookie = 0x123456ULL;
+		return 0;
+	}
+
+	test13_exit_result = a == 1 && ret == 2 && *cookie == 0x123456ULL;
+	return 0;
+}
+
+__u64 test14_result = 0;
+SEC("fexit/bpf_fentry_test1")
+int BPF_PROG(test14, int a, int ret)
+{
+	test14_result = a == 1 && ret == 2;
+	return 0;
+}
+
+__u64 test15_result = 0;
+SEC("fentry/bpf_fentry_test1")
+int BPF_PROG(test15, int a)
+{
+	test15_result = a == 1;
+	return 0;
+}
-- 
2.51.1