[PATCH bpf-next v2 09/10] selftests/bpf: add session cookie testcase for fsession
From: Menglong Dong <hidden>
Date: 2025-10-22 08:06:28
Also in:
bpf, lkml
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, Linus Torvalds
Test the session cookie for fsession. Multiple fsession BPF progs is attached to bpf_fentry_test1() and session cookie is read and write in this testcase. Signed-off-by: Menglong Dong <redacted> --- .../selftests/bpf/prog_tests/fsession_test.c | 34 +++++++++++++ .../selftests/bpf/progs/fsession_cookie.c | 49 +++++++++++++++++++ 2 files changed, 83 insertions(+) create mode 100644 tools/testing/selftests/bpf/progs/fsession_cookie.c
diff --git a/tools/testing/selftests/bpf/prog_tests/fsession_test.c b/tools/testing/selftests/bpf/prog_tests/fsession_test.c
index d70bdb683691..549b6fdd6167 100644
--- a/tools/testing/selftests/bpf/prog_tests/fsession_test.c
+++ b/tools/testing/selftests/bpf/prog_tests/fsession_test.c@@ -2,6 +2,7 @@ /* Copyright (c) 2025 ChinaTelecom */ #include <test_progs.h> #include "fsession_test.skel.h" +#include "fsession_cookie.skel.h" static int check_result(struct fsession_test *skel) {
@@ -82,6 +83,37 @@ static void test_fsession_reattach(void) fsession_test__destroy(skel); } +static void test_fsession_cookie(void) +{ + LIBBPF_OPTS(bpf_test_run_opts, topts); + struct fsession_cookie *skel = NULL; + int err, prog_fd; + + skel = fsession_cookie__open_and_load(); + if (!ASSERT_OK_PTR(skel, "fsession_cookie__open_and_load")) + goto cleanup; + + err = fsession_cookie__attach(skel); + if (!ASSERT_OK(err, "fsession_cookie_attach")) + goto cleanup; + + /* Trigger target once */ + prog_fd = bpf_program__fd(skel->progs.test1); + err = bpf_prog_test_run_opts(prog_fd, &topts); + if (!ASSERT_OK(err, "test_run_opts err")) + goto cleanup; + if (!ASSERT_OK(topts.retval, "test_run_opts retval")) + goto cleanup; + + for (int i = 0; i < sizeof(*skel->bss) / sizeof(__u64); i++) { + if (!ASSERT_EQ(((__u64 *)skel->bss)[i], 1, "test_result")) + goto cleanup; + } + +cleanup: + fsession_cookie__destroy(skel); +} + void test_fsession_test(void) { #if !defined(__x86_64__)
@@ -92,4 +124,6 @@ void test_fsession_test(void) test_fsession_basic(); if (test__start_subtest("fsession_reattach")) test_fsession_reattach(); + if (test__start_subtest("fsession_cookie")) + test_fsession_cookie(); }
diff --git a/tools/testing/selftests/bpf/progs/fsession_cookie.c b/tools/testing/selftests/bpf/progs/fsession_cookie.c
new file mode 100644
index 000000000000..93a120fb62e2
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/fsession_cookie.c@@ -0,0 +1,49 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2025 ChinaTelecom */ +#include <vmlinux.h> +#include <bpf/bpf_helpers.h> +#include <bpf/bpf_tracing.h> + +char _license[] SEC("license") = "GPL"; + +__u64 test1_entry_ok = 0; +__u64 test1_exit_ok = 0; + +SEC("fsession/bpf_fentry_test1") +int BPF_PROG(test1, int a) +{ + __u64 *cookie = bpf_fsession_cookie(ctx); + + if (!bpf_tracing_is_exit(ctx)) { + if (cookie) { + *cookie = 0xAAAABBBBCCCCDDDDull; + test1_entry_ok = *cookie == 0xAAAABBBBCCCCDDDDull; + } + return 0; + } + + if (cookie) + test1_exit_ok = *cookie == 0xAAAABBBBCCCCDDDDull; + return 0; +} + +__u64 test2_entry_ok = 0; +__u64 test2_exit_ok = 0; + +SEC("fsession/bpf_fentry_test1") +int BPF_PROG(test2, int a) +{ + __u64 *cookie = bpf_fsession_cookie(ctx); + + if (!bpf_tracing_is_exit(ctx)) { + if (cookie) { + *cookie = 0x1111222233334444ull; + test2_entry_ok = *cookie == 0x1111222233334444ull; + } + return 0; + } + + if (cookie) + test2_exit_ok = *cookie == 0x1111222233334444ull; + return 0; +}
--
2.51.1.dirty