xref: /linux/tools/testing/selftests/bpf/prog_tests/dummy_st_ops.c (revision 40ccd6aa3e2e05be93394e3cd560c718dedfcc77)
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_success.skel.h"
5 #include "dummy_st_ops_fail.skel.h"
6 #include "trace_dummy_st_ops.skel.h"
7 
8 /* Need to keep consistent with definition in include/linux/bpf.h */
9 struct bpf_dummy_ops_state {
10 	int val;
11 };
12 
13 static void test_dummy_st_ops_attach(void)
14 {
15 	struct dummy_st_ops_success *skel;
16 	struct bpf_link *link;
17 
18 	skel = dummy_st_ops_success__open_and_load();
19 	if (!ASSERT_OK_PTR(skel, "dummy_st_ops_load"))
20 		return;
21 
22 	link = bpf_map__attach_struct_ops(skel->maps.dummy_1);
23 	ASSERT_EQ(libbpf_get_error(link), -EOPNOTSUPP, "dummy_st_ops_attach");
24 
25 	dummy_st_ops_success__destroy(skel);
26 }
27 
28 static void test_dummy_init_ret_value(void)
29 {
30 	__u64 args[1] = {0};
31 	LIBBPF_OPTS(bpf_test_run_opts, attr,
32 		.ctx_in = args,
33 		.ctx_size_in = sizeof(args),
34 	);
35 	struct dummy_st_ops_success *skel;
36 	int fd, err;
37 
38 	skel = dummy_st_ops_success__open_and_load();
39 	if (!ASSERT_OK_PTR(skel, "dummy_st_ops_load"))
40 		return;
41 
42 	fd = bpf_program__fd(skel->progs.test_1);
43 	err = bpf_prog_test_run_opts(fd, &attr);
44 	ASSERT_OK(err, "test_run");
45 	ASSERT_EQ(attr.retval, 0xf2f3f4f5, "test_ret");
46 
47 	dummy_st_ops_success__destroy(skel);
48 }
49 
50 static void test_dummy_init_ptr_arg(void)
51 {
52 	int exp_retval = 0xbeef;
53 	struct bpf_dummy_ops_state in_state = {
54 		.val = exp_retval,
55 	};
56 	__u64 args[1] = {(unsigned long)&in_state};
57 	LIBBPF_OPTS(bpf_test_run_opts, attr,
58 		.ctx_in = args,
59 		.ctx_size_in = sizeof(args),
60 	);
61 	struct trace_dummy_st_ops *trace_skel;
62 	struct dummy_st_ops_success *skel;
63 	int fd, err;
64 
65 	skel = dummy_st_ops_success__open_and_load();
66 	if (!ASSERT_OK_PTR(skel, "dummy_st_ops_load"))
67 		return;
68 
69 	fd = bpf_program__fd(skel->progs.test_1);
70 
71 	trace_skel = trace_dummy_st_ops__open();
72 	if (!ASSERT_OK_PTR(trace_skel, "trace_dummy_st_ops__open"))
73 		goto done;
74 
75 	err = bpf_program__set_attach_target(trace_skel->progs.fentry_test_1,
76 					     fd, "test_1");
77 	if (!ASSERT_OK(err, "set_attach_target(fentry_test_1)"))
78 		goto done;
79 
80 	err = trace_dummy_st_ops__load(trace_skel);
81 	if (!ASSERT_OK(err, "load(trace_skel)"))
82 		goto done;
83 
84 	err = trace_dummy_st_ops__attach(trace_skel);
85 	if (!ASSERT_OK(err, "attach(trace_skel)"))
86 		goto done;
87 
88 	err = bpf_prog_test_run_opts(fd, &attr);
89 	ASSERT_OK(err, "test_run");
90 	ASSERT_EQ(in_state.val, 0x5a, "test_ptr_ret");
91 	ASSERT_EQ(attr.retval, exp_retval, "test_ret");
92 	ASSERT_EQ(trace_skel->bss->val, exp_retval, "fentry_val");
93 
94 done:
95 	dummy_st_ops_success__destroy(skel);
96 	trace_dummy_st_ops__destroy(trace_skel);
97 }
98 
99 static void test_dummy_multiple_args(void)
100 {
101 	struct bpf_dummy_ops_state st = { 7 };
102 	__u64 args[5] = {(__u64)&st, -100, 0x8a5f, 'c', 0x1234567887654321ULL};
103 	LIBBPF_OPTS(bpf_test_run_opts, attr,
104 		.ctx_in = args,
105 		.ctx_size_in = sizeof(args),
106 	);
107 	struct dummy_st_ops_success *skel;
108 	int fd, err;
109 	size_t i;
110 	char name[8];
111 
112 	skel = dummy_st_ops_success__open_and_load();
113 	if (!ASSERT_OK_PTR(skel, "dummy_st_ops_load"))
114 		return;
115 
116 	fd = bpf_program__fd(skel->progs.test_2);
117 	err = bpf_prog_test_run_opts(fd, &attr);
118 	ASSERT_OK(err, "test_run");
119 	args[0] = 7;
120 	for (i = 0; i < ARRAY_SIZE(args); i++) {
121 		snprintf(name, sizeof(name), "arg %zu", i);
122 		ASSERT_EQ(skel->bss->test_2_args[i], args[i], name);
123 	}
124 
125 	dummy_st_ops_success__destroy(skel);
126 }
127 
128 static void test_dummy_sleepable(void)
129 {
130 	struct bpf_dummy_ops_state st;
131 	__u64 args[1] = {(__u64)&st};
132 	LIBBPF_OPTS(bpf_test_run_opts, attr,
133 		.ctx_in = args,
134 		.ctx_size_in = sizeof(args),
135 	);
136 	struct dummy_st_ops_success *skel;
137 	int fd, err;
138 
139 	skel = dummy_st_ops_success__open_and_load();
140 	if (!ASSERT_OK_PTR(skel, "dummy_st_ops_load"))
141 		return;
142 
143 	fd = bpf_program__fd(skel->progs.test_sleepable);
144 	err = bpf_prog_test_run_opts(fd, &attr);
145 	ASSERT_OK(err, "test_run");
146 
147 	dummy_st_ops_success__destroy(skel);
148 }
149 
150 /* dummy_st_ops.test_sleepable() parameter is not marked as nullable,
151  * thus bpf_prog_test_run_opts() below should be rejected as it tries
152  * to pass NULL for this parameter.
153  */
154 static void test_dummy_sleepable_reject_null(void)
155 {
156 	__u64 args[1] = {0};
157 	LIBBPF_OPTS(bpf_test_run_opts, attr,
158 		.ctx_in = args,
159 		.ctx_size_in = sizeof(args),
160 	);
161 	struct dummy_st_ops_success *skel;
162 	int fd, err;
163 
164 	skel = dummy_st_ops_success__open_and_load();
165 	if (!ASSERT_OK_PTR(skel, "dummy_st_ops_load"))
166 		return;
167 
168 	fd = bpf_program__fd(skel->progs.test_sleepable);
169 	err = bpf_prog_test_run_opts(fd, &attr);
170 	ASSERT_EQ(err, -EINVAL, "test_run");
171 
172 	dummy_st_ops_success__destroy(skel);
173 }
174 
175 void test_dummy_st_ops(void)
176 {
177 	if (test__start_subtest("dummy_st_ops_attach"))
178 		test_dummy_st_ops_attach();
179 	if (test__start_subtest("dummy_init_ret_value"))
180 		test_dummy_init_ret_value();
181 	if (test__start_subtest("dummy_init_ptr_arg"))
182 		test_dummy_init_ptr_arg();
183 	if (test__start_subtest("dummy_multiple_args"))
184 		test_dummy_multiple_args();
185 	if (test__start_subtest("dummy_sleepable"))
186 		test_dummy_sleepable();
187 	if (test__start_subtest("dummy_sleepable_reject_null"))
188 		test_dummy_sleepable_reject_null();
189 
190 	RUN_TESTS(dummy_st_ops_fail);
191 }
192