1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2020 Google LLC.
*/
#include <test_progs.h>
#include "modify_return.skel.h"
#define LOWER(x) ((x) & 0xffff)
#define UPPER(x) ((x) >> 16)
static void run_test(__u32 input_retval, __u16 want_side_effect, __s16 want_ret)
{
struct modify_return *skel = NULL;
int err, prog_fd;
__u32 duration = 0, retval;
__u16 side_effect;
__s16 ret;
skel = modify_return__open_and_load();
if (CHECK(!skel, "skel_load", "modify_return skeleton failed\n"))
goto cleanup;
err = modify_return__attach(skel);
if (CHECK(err, "modify_return", "attach failed: %d\n", err))
goto cleanup;
skel->bss->input_retval = input_retval;
prog_fd = bpf_program__fd(skel->progs.fmod_ret_test);
err = bpf_prog_test_run(prog_fd, 1, NULL, 0, NULL, 0,
&retval, &duration);
CHECK(err, "test_run", "err %d errno %d\n", err, errno);
side_effect = UPPER(retval);
ret = LOWER(retval);
CHECK(ret != want_ret, "test_run",
"unexpected ret: %d, expected: %d\n", ret, want_ret);
CHECK(side_effect != want_side_effect, "modify_return",
"unexpected side_effect: %d\n", side_effect);
CHECK(skel->bss->fentry_result != 1, "modify_return",
"fentry failed\n");
CHECK(skel->bss->fexit_result != 1, "modify_return",
"fexit failed\n");
CHECK(skel->bss->fmod_ret_result != 1, "modify_return",
"fmod_ret failed\n");
cleanup:
modify_return__destroy(skel);
}
void test_modify_return(void)
{
run_test(0 /* input_retval */,
1 /* want_side_effect */,
4 /* want_ret */);
run_test(-EINVAL /* input_retval */,
0 /* want_side_effect */,
-EINVAL /* want_ret */);
}
|
