tools/testing/selftests/bpf/prog_tests/dummy_st_ops.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/prog_tests/dummy_st_ops.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/prog_tests/dummy_st_ops.c
Extension
.c
Size
5052 bytes
Lines
192
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

struct bpf_dummy_ops_state {
	int val;
};

static void test_dummy_st_ops_attach(void)
{
	struct dummy_st_ops_success *skel;
	struct bpf_link *link;

	skel = dummy_st_ops_success__open_and_load();
	if (!ASSERT_OK_PTR(skel, "dummy_st_ops_load"))
		return;

	link = bpf_map__attach_struct_ops(skel->maps.dummy_1);
	ASSERT_EQ(libbpf_get_error(link), -EOPNOTSUPP, "dummy_st_ops_attach");

	dummy_st_ops_success__destroy(skel);
}

static void test_dummy_init_ret_value(void)
{
	__u64 args[1] = {0};
	LIBBPF_OPTS(bpf_test_run_opts, attr,
		.ctx_in = args,
		.ctx_size_in = sizeof(args),
	);
	struct dummy_st_ops_success *skel;
	int fd, err;

	skel = dummy_st_ops_success__open_and_load();
	if (!ASSERT_OK_PTR(skel, "dummy_st_ops_load"))
		return;

	fd = bpf_program__fd(skel->progs.test_1);
	err = bpf_prog_test_run_opts(fd, &attr);
	ASSERT_OK(err, "test_run");
	ASSERT_EQ(attr.retval, 0xf2f3f4f5, "test_ret");

	dummy_st_ops_success__destroy(skel);
}

static void test_dummy_init_ptr_arg(void)
{
	int exp_retval = 0xbeef;
	struct bpf_dummy_ops_state in_state = {
		.val = exp_retval,
	};
	__u64 args[1] = {(unsigned long)&in_state};
	LIBBPF_OPTS(bpf_test_run_opts, attr,
		.ctx_in = args,
		.ctx_size_in = sizeof(args),
	);
	struct trace_dummy_st_ops *trace_skel;
	struct dummy_st_ops_success *skel;
	int fd, err;

	skel = dummy_st_ops_success__open_and_load();
	if (!ASSERT_OK_PTR(skel, "dummy_st_ops_load"))
		return;

	fd = bpf_program__fd(skel->progs.test_1);

	trace_skel = trace_dummy_st_ops__open();
	if (!ASSERT_OK_PTR(trace_skel, "trace_dummy_st_ops__open"))
		goto done;

	err = bpf_program__set_attach_target(trace_skel->progs.fentry_test_1,
					     fd, "test_1");
	if (!ASSERT_OK(err, "set_attach_target(fentry_test_1)"))
		goto done;

	err = trace_dummy_st_ops__load(trace_skel);
	if (!ASSERT_OK(err, "load(trace_skel)"))
		goto done;

	err = trace_dummy_st_ops__attach(trace_skel);
	if (!ASSERT_OK(err, "attach(trace_skel)"))
		goto done;

	err = bpf_prog_test_run_opts(fd, &attr);
	ASSERT_OK(err, "test_run");
	ASSERT_EQ(in_state.val, 0x5a, "test_ptr_ret");
	ASSERT_EQ(attr.retval, exp_retval, "test_ret");
	ASSERT_EQ(trace_skel->bss->val, exp_retval, "fentry_val");

done:
	dummy_st_ops_success__destroy(skel);
	trace_dummy_st_ops__destroy(trace_skel);
}

Annotation

Implementation Notes