1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */
3#include <test_progs.h>
4#include <time.h>
5
6#include "struct_ops_module.skel.h"
7
8static void check_map_info(struct bpf_map_info *info)
9{
10	struct bpf_btf_info btf_info;
11	char btf_name[256];
12	u32 btf_info_len = sizeof(btf_info);
13	int err, fd;
14
15	fd = bpf_btf_get_fd_by_id(info->btf_vmlinux_id);
16	if (!ASSERT_GE(fd, 0, "get_value_type_btf_obj_fd"))
17		return;
18
19	memset(&btf_info, 0, sizeof(btf_info));
20	btf_info.name = ptr_to_u64(btf_name);
21	btf_info.name_len = sizeof(btf_name);
22	err = bpf_btf_get_info_by_fd(fd, &btf_info, &btf_info_len);
23	if (!ASSERT_OK(err, "get_value_type_btf_obj_info"))
24		goto cleanup;
25
26	if (!ASSERT_EQ(strcmp(btf_name, "bpf_testmod"), 0, "get_value_type_btf_obj_name"))
27		goto cleanup;
28
29cleanup:
30	close(fd);
31}
32
33static int attach_ops_and_check(struct struct_ops_module *skel,
34				struct bpf_map *map,
35				int expected_test_2_result)
36{
37	struct bpf_link *link;
38
39	link = bpf_map__attach_struct_ops(map);
40	ASSERT_OK_PTR(link, "attach_test_mod_1");
41	if (!link)
42		return -1;
43
44	/* test_{1,2}() would be called from bpf_dummy_reg() in bpf_testmod.c */
45	ASSERT_EQ(skel->bss->test_1_result, 0xdeadbeef, "test_1_result");
46	ASSERT_EQ(skel->bss->test_2_result, expected_test_2_result, "test_2_result");
47
48	bpf_link__destroy(link);
49	return 0;
50}
51
52static void test_struct_ops_load(void)
53{
54	struct struct_ops_module *skel;
55	struct bpf_map_info info = {};
56	int err;
57	u32 len;
58
59	skel = struct_ops_module__open();
60	if (!ASSERT_OK_PTR(skel, "struct_ops_module_open"))
61		return;
62
63	skel->struct_ops.testmod_1->data = 13;
64	skel->struct_ops.testmod_1->test_2 = skel->progs.test_3;
65	/* Since test_2() is not being used, it should be disabled from
66	 * auto-loading, or it will fail to load.
67	 */
68	bpf_program__set_autoload(skel->progs.test_2, false);
69
70	err = struct_ops_module__load(skel);
71	if (!ASSERT_OK(err, "struct_ops_module_load"))
72		goto cleanup;
73
74	len = sizeof(info);
75	err = bpf_map_get_info_by_fd(bpf_map__fd(skel->maps.testmod_1), &info,
76				     &len);
77	if (!ASSERT_OK(err, "bpf_map_get_info_by_fd"))
78		goto cleanup;
79
80	check_map_info(&info);
81	/* test_3() will be called from bpf_dummy_reg() in bpf_testmod.c
82	 *
83	 * In bpf_testmod.c it will pass 4 and 13 (the value of data) to
84	 * .test_2.  So, the value of test_2_result should be 20 (4 + 13 +
85	 * 3).
86	 */
87	if (!attach_ops_and_check(skel, skel->maps.testmod_1, 20))
88		goto cleanup;
89	if (!attach_ops_and_check(skel, skel->maps.testmod_2, 12))
90		goto cleanup;
91
92cleanup:
93	struct_ops_module__destroy(skel);
94}
95
96void serial_test_struct_ops_module(void)
97{
98	if (test__start_subtest("test_struct_ops_load"))
99		test_struct_ops_load();
100}
101
102