Running a BPF_PROG_TYPE_STRUCT_OPS prog for dummy_st_ops::init()
through bpf_prog_test_run(). Three test cases are added:
(1) attach dummy_st_ops should fail
(2) function return value of bpf_dummy_ops::init() is expected
(3) pointer argument of bpf_dummy_ops::init() works as expected
Signed-off-by: Hou Tao <houtao1@xxxxxxxxxx>
---
.../selftests/bpf/prog_tests/dummy_st_ops.c | 81 +++++++++++++++++++
.../selftests/bpf/progs/dummy_st_ops.c | 33 ++++++++
2 files changed, 114 insertions(+)
create mode 100644 tools/testing/selftests/bpf/prog_tests/dummy_st_ops.c
create mode 100644 tools/testing/selftests/bpf/progs/dummy_st_ops.c
diff --git a/tools/testing/selftests/bpf/prog_tests/dummy_st_ops.c b/tools/testing/selftests/bpf/prog_tests/dummy_st_ops.c
new file mode 100644
index 000000000000..4b1b52b847e6
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/dummy_st_ops.c
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (C) 2021. Huawei Technologies Co., Ltd */
+#include <test_progs.h>
+#include "dummy_st_ops.skel.h"
+
+/* Need to keep consistent with definitions in include/linux/bpf_dummy_ops.h */
+struct bpf_dummy_ops_state {
+ int val;
+};
+
+static void test_dummy_st_ops_attach(void)
+{
+ struct dummy_st_ops *skel;
+ struct bpf_link *link;
+
+ skel = dummy_st_ops__open_and_load();
+ if (!ASSERT_OK_PTR(skel, "dummy_st_ops_load"))
+ goto out;
+
+ link = bpf_map__attach_struct_ops(skel->maps.dummy_1);
+ if (!ASSERT_EQ(libbpf_get_error(link), -EOPNOTSUPP,
+ "dummy_st_ops_attach"))
+ goto out;
+out:
+ dummy_st_ops__destroy(skel);
+}
+
+static void test_dummy_init_ret_value(void)
+{
+ struct dummy_st_ops *skel;
+ int err, fd;
+ __u32 duration = 0, retval = 0;
+
+ skel = dummy_st_ops__open_and_load();
+ if (!ASSERT_OK_PTR(skel, "dummy_st_ops_load"))
+ goto out;
+
+ fd = bpf_program__fd(skel->progs.init_1);
+ err = bpf_prog_test_run(fd, 1, NULL, 0,
+ NULL, NULL, &retval, &duration);
+ ASSERT_OK(err, "test_run");
+ ASSERT_EQ(retval, 0xf2f3f4f5, "test_ret");
+out:
+ dummy_st_ops__destroy(skel);
+}
+
+static void test_dummy_init_ptr_arg(void)
+{
+ struct dummy_st_ops *skel;
+ int err, fd;
+ __u32 duration = 0, retval = 0;
+ struct bpf_dummy_ops_state in_state, out_state;
+ __u32 state_size;
+
+ skel = dummy_st_ops__open_and_load();
+ if (!ASSERT_OK_PTR(skel, "dummy_st_ops_load"))
+ goto out;
+
+ fd = bpf_program__fd(skel->progs.init_1);
+ memset(&in_state, 0, sizeof(in_state));
+ in_state.val = 0xbeef;
+ memset(&out_state, 0, sizeof(out_state));
+ err = bpf_prog_test_run(fd, 1, &in_state, sizeof(in_state),
+ &out_state, &state_size, &retval, &duration);
+ ASSERT_OK(err, "test_run");
+ ASSERT_EQ(state_size, sizeof(out_state), "test_data_out");
+ ASSERT_EQ(out_state.val, 0x5a, "test_ptr_ret");
+ ASSERT_EQ(retval, in_state.val, "test_ret");
+out:
+ dummy_st_ops__destroy(skel);
+}
+
+void test_dummy_st_ops(void)
+{
+ if (test__start_subtest("dummy_st_ops_attach"))
+ test_dummy_st_ops_attach();
+ if (test__start_subtest("dummy_init_ret_value"))
+ test_dummy_init_ret_value();
+ if (test__start_subtest("dummy_init_ptr_arg"))
+ test_dummy_init_ptr_arg();
+}
diff --git a/tools/testing/selftests/bpf/progs/dummy_st_ops.c b/tools/testing/selftests/bpf/progs/dummy_st_ops.c
new file mode 100644
index 000000000000..133c328f082a
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/dummy_st_ops.c
@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (C) 2021. Huawei Technologies Co., Ltd */
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+
+struct bpf_dummy_ops_state {
+ int val;
+} __attribute__((preserve_access_index));
+
+struct bpf_dummy_ops {
+ int (*init)(struct bpf_dummy_ops_state *state);
+};
+
+char _liencse[] SEC("license") = "GPL";
+
+SEC("struct_ops/init_1")
+int BPF_PROG(init_1, struct bpf_dummy_ops_state *state)
+{
+ int ret;
+
+ if (!state)
+ return 0xf2f3f4f5;
+
+ ret = state->val;
+ state->val = 0x5a;
+ return ret;
+}
+
+SEC(".struct_ops")
+struct bpf_dummy_ops dummy_1 = {
+ .init = (void *)init_1,
+};
--
2.29.2
