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Fri, 23 Jan 2026 22:22:00 -0800 (PST) From: Menglong Dong X-Google-Original-From: Menglong Dong To: andrii@kernel.org Cc: ast@kernel.org, daniel@iogearbox.net, martin.lau@linux.dev, eddyz87@gmail.com, song@kernel.org, yonghong.song@linux.dev, john.fastabend@gmail.com, kpsingh@kernel.org, sdf@fomichev.me, haoluo@google.com, jolsa@kernel.org, davem@davemloft.net, dsahern@kernel.org, tglx@linutronix.de, mingo@redhat.com, jiang.biao@linux.dev, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, bpf@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH bpf-next v13 11/13] selftests/bpf: test bpf_get_func_* for fsession Date: Sat, 24 Jan 2026 14:20:06 +0800 Message-ID: <20260124062008.8657-12-dongml2@chinatelecom.cn> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260124062008.8657-1-dongml2@chinatelecom.cn> References: <20260124062008.8657-1-dongml2@chinatelecom.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Test following bpf helper for fsession: bpf_get_func_arg() bpf_get_func_arg_cnt() bpf_get_func_ret() bpf_get_func_ip() Signed-off-by: Menglong Dong --- v13: - fix the selftests fail on !x86_64 --- .../bpf/prog_tests/get_func_args_test.c | 1 + .../bpf/prog_tests/get_func_ip_test.c | 2 + .../selftests/bpf/progs/get_func_args_test.c | 40 ++++++++++++++++++- .../selftests/bpf/progs/get_func_ip_test.c | 23 +++++++++++ 4 files changed, 65 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/prog_tests/get_func_args_test.c b/= tools/testing/selftests/bpf/prog_tests/get_func_args_test.c index fadee95d3ae8..96b27de05524 100644 --- a/tools/testing/selftests/bpf/prog_tests/get_func_args_test.c +++ b/tools/testing/selftests/bpf/prog_tests/get_func_args_test.c @@ -41,6 +41,7 @@ void test_get_func_args_test(void) ASSERT_EQ(skel->bss->test4_result, 1, "test4_result"); ASSERT_EQ(skel->bss->test5_result, 1, "test5_result"); ASSERT_EQ(skel->bss->test6_result, 1, "test6_result"); + ASSERT_EQ(skel->bss->test7_result, 1, "test7_result"); =20 cleanup: get_func_args_test__destroy(skel); diff --git a/tools/testing/selftests/bpf/prog_tests/get_func_ip_test.c b/to= ols/testing/selftests/bpf/prog_tests/get_func_ip_test.c index c40242dfa8fb..7772a0f288d3 100644 --- a/tools/testing/selftests/bpf/prog_tests/get_func_ip_test.c +++ b/tools/testing/selftests/bpf/prog_tests/get_func_ip_test.c @@ -46,6 +46,8 @@ static void test_function_entry(void) ASSERT_EQ(skel->bss->test5_result, 1, "test5_result"); ASSERT_EQ(skel->bss->test7_result, 1, "test7_result"); ASSERT_EQ(skel->bss->test8_result, 1, "test8_result"); + ASSERT_EQ(skel->bss->test9_entry_result, 1, "test9_entry_result"); + ASSERT_EQ(skel->bss->test9_exit_result, 1, "test9_exit_result"); =20 cleanup: get_func_ip_test__destroy(skel); diff --git a/tools/testing/selftests/bpf/progs/get_func_args_test.c b/tools= /testing/selftests/bpf/progs/get_func_args_test.c index 5b7233afef05..0a3236a7a109 100644 --- a/tools/testing/selftests/bpf/progs/get_func_args_test.c +++ b/tools/testing/selftests/bpf/progs/get_func_args_test.c @@ -1,5 +1,5 @@ // SPDX-License-Identifier: GPL-2.0 -#include +#include #include #include #include @@ -165,3 +165,41 @@ int BPF_PROG(tp_test2) =20 return 0; } + +__u64 test7_result =3D 0; +#ifdef __TARGET_ARCH_x86 +SEC("fsession/bpf_fentry_test1") +int BPF_PROG(test7) +{ + __u64 cnt =3D bpf_get_func_arg_cnt(ctx); + __u64 a =3D 0, z =3D 0, ret =3D 0; + __s64 err; + + test7_result =3D cnt =3D=3D 1; + + /* valid arguments */ + err =3D bpf_get_func_arg(ctx, 0, &a); + test7_result &=3D err =3D=3D 0 && ((int) a =3D=3D 1); + + /* not valid argument */ + err =3D bpf_get_func_arg(ctx, 1, &z); + test7_result &=3D err =3D=3D -EINVAL; + + if (bpf_session_is_return(ctx)) { + err =3D bpf_get_func_ret(ctx, &ret); + test7_result &=3D err =3D=3D 0 && ret =3D=3D 2; + } else { + err =3D bpf_get_func_ret(ctx, &ret); + test7_result &=3D err =3D=3D 0 && ret =3D=3D 0; + } + + return 0; +} +#else +SEC("fentry/bpf_fentry_test1") +int BPF_PROG(test7) +{ + test7_result =3D 1; + return 0; +} +#endif diff --git a/tools/testing/selftests/bpf/progs/get_func_ip_test.c b/tools/t= esting/selftests/bpf/progs/get_func_ip_test.c index 2011cacdeb18..65f7e1f182bf 100644 --- a/tools/testing/selftests/bpf/progs/get_func_ip_test.c +++ b/tools/testing/selftests/bpf/progs/get_func_ip_test.c @@ -103,3 +103,26 @@ int BPF_URETPROBE(test8, int ret) test8_result =3D (const void *) addr =3D=3D (const void *) uprobe_trigger; return 0; } + +__u64 test9_entry_result =3D 0; +__u64 test9_exit_result =3D 0; +#ifdef __TARGET_ARCH_x86 +SEC("fsession/bpf_fentry_test1") +int BPF_PROG(test9, int a) +{ + __u64 addr =3D bpf_get_func_ip(ctx); + + if (bpf_session_is_return(ctx)) + test9_exit_result =3D (const void *) addr =3D=3D &bpf_fentry_test1; + else + test9_entry_result =3D (const void *) addr =3D=3D &bpf_fentry_test1; + return 0; +} +#else +SEC("fentry/bpf_fentry_test1") +int BPF_PROG(test9, int a) +{ + test9_entry_result =3D test9_exit_result =3D 1; + return 0; +} +#endif --=20 2.52.0