[PATCH bpf-next 2/2] selftests/bpf: add set_attach_target() API selftest for module target
From: Andrii Nakryiko <andrii@kernel.org>
Date: 2020-12-11 22:55:18
Also in:
bpf
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, Shuah Khan, Linus Torvalds
Add test for bpf_program__set_attach_target() API, validating it can find kernel module fentry target. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> --- .../testing/selftests/bpf/prog_tests/module_attach.c | 11 ++++++++++- .../testing/selftests/bpf/progs/test_module_attach.c | 11 +++++++++++ 2 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/module_attach.c b/tools/testing/selftests/bpf/prog_tests/module_attach.c
index 4b65e9918764..50796b651f72 100644
--- a/tools/testing/selftests/bpf/prog_tests/module_attach.c
+++ b/tools/testing/selftests/bpf/prog_tests/module_attach.c@@ -28,10 +28,18 @@ void test_module_attach(void) struct test_module_attach__bss *bss; int err; - skel = test_module_attach__open_and_load(); + skel = test_module_attach__open(); if (CHECK(!skel, "skel_open", "failed to open skeleton\n")) return; + err = bpf_program__set_attach_target(skel->progs.handle_fentry_manual, + 0, "bpf_testmod_test_read"); + ASSERT_OK(err, "set_attach_target"); + + err = test_module_attach__load(skel); + if (CHECK(err, "skel_load", "failed to load skeleton\n")) + return; + bss = skel->bss; err = test_module_attach__attach(skel);
@@ -44,6 +52,7 @@ void test_module_attach(void) ASSERT_EQ(bss->raw_tp_read_sz, READ_SZ, "raw_tp"); ASSERT_EQ(bss->tp_btf_read_sz, READ_SZ, "tp_btf"); ASSERT_EQ(bss->fentry_read_sz, READ_SZ, "fentry"); + ASSERT_EQ(bss->fentry_manual_read_sz, READ_SZ, "fentry_manual"); ASSERT_EQ(bss->fexit_read_sz, READ_SZ, "fexit"); ASSERT_EQ(bss->fexit_ret, -EIO, "fexit_tet"); ASSERT_EQ(bss->fmod_ret_read_sz, READ_SZ, "fmod_ret");
diff --git a/tools/testing/selftests/bpf/progs/test_module_attach.c b/tools/testing/selftests/bpf/progs/test_module_attach.c
index b563563df172..efd1e287ac17 100644
--- a/tools/testing/selftests/bpf/progs/test_module_attach.c
+++ b/tools/testing/selftests/bpf/progs/test_module_attach.c@@ -38,6 +38,17 @@ int BPF_PROG(handle_fentry, return 0; } +__u32 fentry_manual_read_sz = 0; + +SEC("fentry/placeholder") +int BPF_PROG(handle_fentry_manual, + struct file *file, struct kobject *kobj, + struct bin_attribute *bin_attr, char *buf, loff_t off, size_t len) +{ + fentry_manual_read_sz = len; + return 0; +} + __u32 fexit_read_sz = 0; int fexit_ret = 0;
--
2.24.1