[PATCH bpf-next v11 11/12] selftests/bpf: add testcases for fsession cookie
From: Menglong Dong <hidden>
Date: 2026-01-23 07:37:18
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 session cookie for fsession. Multiple fsession BPF progs is attached to bpf_fentry_test1() and session cookie is read and write in the testcase. Signed-off-by: Menglong Dong <redacted> --- v11: - add "volatile" to the variable "cookie" v3: - restructure the testcase by combine the testcases for session cookie and get_func_ip into one patch --- .../selftests/bpf/progs/fsession_test.c | 53 +++++++++++++++++++ 1 file changed, 53 insertions(+)
diff --git a/tools/testing/selftests/bpf/progs/fsession_test.c b/tools/testing/selftests/bpf/progs/fsession_test.c
index f504984d42f2..211332bdcccb 100644
--- a/tools/testing/selftests/bpf/progs/fsession_test.c
+++ b/tools/testing/selftests/bpf/progs/fsession_test.c@@ -108,3 +108,56 @@ int BPF_PROG(test6, int a) test6_entry_result = (const void *) addr == &bpf_fentry_test1; return 0; } + +__u64 test7_entry_ok = 0; +__u64 test7_exit_ok = 0; +SEC("fsession/bpf_fentry_test1") +int BPF_PROG(test7, int a) +{ + volatile __u64 *cookie = bpf_session_cookie(ctx); + + if (!bpf_session_is_return(ctx)) { + *cookie = 0xAAAABBBBCCCCDDDDull; + test7_entry_ok = *cookie == 0xAAAABBBBCCCCDDDDull; + return 0; + } + + test7_exit_ok = *cookie == 0xAAAABBBBCCCCDDDDull; + return 0; +} + +__u64 test8_entry_ok = 0; +__u64 test8_exit_ok = 0; + +SEC("fsession/bpf_fentry_test1") +int BPF_PROG(test8, int a) +{ + volatile __u64 *cookie = bpf_session_cookie(ctx); + + if (!bpf_session_is_return(ctx)) { + *cookie = 0x1111222233334444ull; + test8_entry_ok = *cookie == 0x1111222233334444ull; + return 0; + } + + test8_exit_ok = *cookie == 0x1111222233334444ull; + return 0; +} + +__u64 test9_entry_result = 0; +__u64 test9_exit_result = 0; + +SEC("fsession/bpf_fentry_test1") +int BPF_PROG(test9, int a, int ret) +{ + __u64 *cookie = bpf_session_cookie(ctx); + + if (!bpf_session_is_return(ctx)) { + test9_entry_result = a == 1 && ret == 0; + *cookie = 0x123456ULL; + return 0; + } + + test9_exit_result = a == 1 && ret == 2 && *cookie == 0x123456ULL; + return 0; +}
--
2.52.0