1// SPDX-License-Identifier: GPL-2.0
2
3/*
4 * Copyright 2020 Google LLC.
5 */
6
7#include <test_progs.h>
8#include "modify_return.skel.h"
9
10#define LOWER(x) ((x) & 0xffff)
11#define UPPER(x) ((x) >> 16)
12
13
14static void run_test(__u32 input_retval, __u16 want_side_effect, __s16 want_ret)
15{
16	struct modify_return *skel = NULL;
17	int err, prog_fd;
18	__u16 side_effect;
19	__s16 ret;
20	LIBBPF_OPTS(bpf_test_run_opts, topts);
21
22	skel = modify_return__open_and_load();
23	if (!ASSERT_OK_PTR(skel, "skel_load"))
24		goto cleanup;
25
26	err = modify_return__attach(skel);
27	if (!ASSERT_OK(err, "modify_return__attach failed"))
28		goto cleanup;
29
30	skel->bss->input_retval = input_retval;
31	prog_fd = bpf_program__fd(skel->progs.fmod_ret_test);
32	err = bpf_prog_test_run_opts(prog_fd, &topts);
33	ASSERT_OK(err, "test_run");
34
35	side_effect = UPPER(topts.retval);
36	ret = LOWER(topts.retval);
37
38	ASSERT_EQ(ret, want_ret, "test_run ret");
39	ASSERT_EQ(side_effect, want_side_effect, "modify_return side_effect");
40	ASSERT_EQ(skel->bss->fentry_result, 1, "modify_return fentry_result");
41	ASSERT_EQ(skel->bss->fexit_result, 1, "modify_return fexit_result");
42	ASSERT_EQ(skel->bss->fmod_ret_result, 1, "modify_return fmod_ret_result");
43
44	ASSERT_EQ(skel->bss->fentry_result2, 1, "modify_return fentry_result2");
45	ASSERT_EQ(skel->bss->fexit_result2, 1, "modify_return fexit_result2");
46	ASSERT_EQ(skel->bss->fmod_ret_result2, 1, "modify_return fmod_ret_result2");
47
48cleanup:
49	modify_return__destroy(skel);
50}
51
52/* TODO: conflict with get_func_ip_test */
53void serial_test_modify_return(void)
54{
55	run_test(0 /* input_retval */,
56		 2 /* want_side_effect */,
57		 33 /* want_ret */);
58	run_test(-EINVAL /* input_retval */,
59		 0 /* want_side_effect */,
60		 -EINVAL * 2 /* want_ret */);
61}
62