1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2019 Facebook */
3 #include <test_progs.h>
4 #include "fentry_test.skel.h"
5
fentry_test(struct fentry_test * fentry_skel)6 static int fentry_test(struct fentry_test *fentry_skel)
7 {
8 int err, prog_fd, i;
9 __u32 duration = 0, retval;
10 struct bpf_link *link;
11 __u64 *result;
12
13 err = fentry_test__attach(fentry_skel);
14 if (!ASSERT_OK(err, "fentry_attach"))
15 return err;
16
17 /* Check that already linked program can't be attached again. */
18 link = bpf_program__attach(fentry_skel->progs.test1);
19 if (!ASSERT_ERR_PTR(link, "fentry_attach_link"))
20 return -1;
21
22 prog_fd = bpf_program__fd(fentry_skel->progs.test1);
23 err = bpf_prog_test_run(prog_fd, 1, NULL, 0,
24 NULL, NULL, &retval, &duration);
25 ASSERT_OK(err, "test_run");
26 ASSERT_EQ(retval, 0, "test_run");
27
28 result = (__u64 *)fentry_skel->bss;
29 for (i = 0; i < sizeof(*fentry_skel->bss) / sizeof(__u64); i++) {
30 if (!ASSERT_EQ(result[i], 1, "fentry_result"))
31 return -1;
32 }
33
34 fentry_test__detach(fentry_skel);
35
36 /* zero results for re-attach test */
37 memset(fentry_skel->bss, 0, sizeof(*fentry_skel->bss));
38 return 0;
39 }
40
test_fentry_test(void)41 void test_fentry_test(void)
42 {
43 struct fentry_test *fentry_skel = NULL;
44 int err;
45
46 fentry_skel = fentry_test__open_and_load();
47 if (!ASSERT_OK_PTR(fentry_skel, "fentry_skel_load"))
48 goto cleanup;
49
50 err = fentry_test(fentry_skel);
51 if (!ASSERT_OK(err, "fentry_first_attach"))
52 goto cleanup;
53
54 err = fentry_test(fentry_skel);
55 ASSERT_OK(err, "fentry_second_attach");
56
57 cleanup:
58 fentry_test__destroy(fentry_skel);
59 }
60