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
run_test(__u32 input_retval,__u16 want_side_effect,__s16 want_ret)14 static 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
48 cleanup:
49 modify_return__destroy(skel);
50 }
51
52 /* TODO: conflict with get_func_ip_test */
serial_test_modify_return(void)53 void 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