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 */
  9struct bpf_dummy_ops_state {
 10	int val;
 11};
 12
 13static 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
 28static 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
 50static 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
 94done:
 95	dummy_st_ops_success__destroy(skel);
 96	trace_dummy_st_ops__destroy(trace_skel);
 97}
 98
 99static 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
128static 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 */
154static 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
175void 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}