1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) 2021. Huawei Technologies Co., Ltd */
3 #include <test_progs.h>
4 #include "dummy_st_ops.skel.h"
5 #include "trace_dummy_st_ops.skel.h"
6 
7 /* Need to keep consistent with definition in include/linux/bpf.h */
8 struct bpf_dummy_ops_state {
9 	int val;
10 };
11 
test_dummy_st_ops_attach(void)12 static void test_dummy_st_ops_attach(void)
13 {
14 	struct dummy_st_ops *skel;
15 	struct bpf_link *link;
16 
17 	skel = dummy_st_ops__open_and_load();
18 	if (!ASSERT_OK_PTR(skel, "dummy_st_ops_load"))
19 		return;
20 
21 	link = bpf_map__attach_struct_ops(skel->maps.dummy_1);
22 	ASSERT_EQ(libbpf_get_error(link), -EOPNOTSUPP, "dummy_st_ops_attach");
23 
24 	dummy_st_ops__destroy(skel);
25 }
26 
test_dummy_init_ret_value(void)27 static void test_dummy_init_ret_value(void)
28 {
29 	__u64 args[1] = {0};
30 	LIBBPF_OPTS(bpf_test_run_opts, attr,
31 		.ctx_in = args,
32 		.ctx_size_in = sizeof(args),
33 	);
34 	struct dummy_st_ops *skel;
35 	int fd, err;
36 
37 	skel = dummy_st_ops__open_and_load();
38 	if (!ASSERT_OK_PTR(skel, "dummy_st_ops_load"))
39 		return;
40 
41 	fd = bpf_program__fd(skel->progs.test_1);
42 	err = bpf_prog_test_run_opts(fd, &attr);
43 	ASSERT_OK(err, "test_run");
44 	ASSERT_EQ(attr.retval, 0xf2f3f4f5, "test_ret");
45 
46 	dummy_st_ops__destroy(skel);
47 }
48 
test_dummy_init_ptr_arg(void)49 static void test_dummy_init_ptr_arg(void)
50 {
51 	int exp_retval = 0xbeef;
52 	struct bpf_dummy_ops_state in_state = {
53 		.val = exp_retval,
54 	};
55 	__u64 args[1] = {(unsigned long)&in_state};
56 	LIBBPF_OPTS(bpf_test_run_opts, attr,
57 		.ctx_in = args,
58 		.ctx_size_in = sizeof(args),
59 	);
60 	struct trace_dummy_st_ops *trace_skel;
61 	struct dummy_st_ops *skel;
62 	int fd, err;
63 
64 	skel = dummy_st_ops__open_and_load();
65 	if (!ASSERT_OK_PTR(skel, "dummy_st_ops_load"))
66 		return;
67 
68 	fd = bpf_program__fd(skel->progs.test_1);
69 
70 	trace_skel = trace_dummy_st_ops__open();
71 	if (!ASSERT_OK_PTR(trace_skel, "trace_dummy_st_ops__open"))
72 		goto done;
73 
74 	err = bpf_program__set_attach_target(trace_skel->progs.fentry_test_1,
75 					     fd, "test_1");
76 	if (!ASSERT_OK(err, "set_attach_target(fentry_test_1)"))
77 		goto done;
78 
79 	err = trace_dummy_st_ops__load(trace_skel);
80 	if (!ASSERT_OK(err, "load(trace_skel)"))
81 		goto done;
82 
83 	err = trace_dummy_st_ops__attach(trace_skel);
84 	if (!ASSERT_OK(err, "attach(trace_skel)"))
85 		goto done;
86 
87 	err = bpf_prog_test_run_opts(fd, &attr);
88 	ASSERT_OK(err, "test_run");
89 	ASSERT_EQ(in_state.val, 0x5a, "test_ptr_ret");
90 	ASSERT_EQ(attr.retval, exp_retval, "test_ret");
91 	ASSERT_EQ(trace_skel->bss->val, exp_retval, "fentry_val");
92 
93 done:
94 	dummy_st_ops__destroy(skel);
95 	trace_dummy_st_ops__destroy(trace_skel);
96 }
97 
test_dummy_multiple_args(void)98 static void test_dummy_multiple_args(void)
99 {
100 	__u64 args[5] = {0, -100, 0x8a5f, 'c', 0x1234567887654321ULL};
101 	LIBBPF_OPTS(bpf_test_run_opts, attr,
102 		.ctx_in = args,
103 		.ctx_size_in = sizeof(args),
104 	);
105 	struct dummy_st_ops *skel;
106 	int fd, err;
107 	size_t i;
108 	char name[8];
109 
110 	skel = dummy_st_ops__open_and_load();
111 	if (!ASSERT_OK_PTR(skel, "dummy_st_ops_load"))
112 		return;
113 
114 	fd = bpf_program__fd(skel->progs.test_2);
115 	err = bpf_prog_test_run_opts(fd, &attr);
116 	ASSERT_OK(err, "test_run");
117 	for (i = 0; i < ARRAY_SIZE(args); i++) {
118 		snprintf(name, sizeof(name), "arg %zu", i);
119 		ASSERT_EQ(skel->bss->test_2_args[i], args[i], name);
120 	}
121 
122 	dummy_st_ops__destroy(skel);
123 }
124 
test_dummy_st_ops(void)125 void test_dummy_st_ops(void)
126 {
127 	if (test__start_subtest("dummy_st_ops_attach"))
128 		test_dummy_st_ops_attach();
129 	if (test__start_subtest("dummy_init_ret_value"))
130 		test_dummy_init_ret_value();
131 	if (test__start_subtest("dummy_init_ptr_arg"))
132 		test_dummy_init_ptr_arg();
133 	if (test__start_subtest("dummy_multiple_args"))
134 		test_dummy_multiple_args();
135 }
136