1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright (c) 2019 Facebook */
 3#include <test_progs.h>
 4#include "fentry_test.lskel.h"
 5
 6static int fentry_test(struct fentry_test_lskel *fentry_skel)
 7{
 8	int err, prog_fd, i;
 9	int link_fd;
10	__u64 *result;
11	LIBBPF_OPTS(bpf_test_run_opts, topts);
12
13	err = fentry_test_lskel__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_fd = fentry_test_lskel__test1__attach(fentry_skel);
19	if (!ASSERT_LT(link_fd, 0, "fentry_attach_link"))
20		return -1;
21
22	prog_fd = fentry_skel->progs.test1.prog_fd;
23	err = bpf_prog_test_run_opts(prog_fd, &topts);
24	ASSERT_OK(err, "test_run");
25	ASSERT_EQ(topts.retval, 0, "test_run");
26
27	result = (__u64 *)fentry_skel->bss;
28	for (i = 0; i < sizeof(*fentry_skel->bss) / sizeof(__u64); i++) {
29		if (!ASSERT_EQ(result[i], 1, "fentry_result"))
30			return -1;
31	}
32
33	fentry_test_lskel__detach(fentry_skel);
34
35	/* zero results for re-attach test */
36	memset(fentry_skel->bss, 0, sizeof(*fentry_skel->bss));
37	return 0;
38}
39
40void test_fentry_test(void)
41{
42	struct fentry_test_lskel *fentry_skel = NULL;
43	int err;
44
45	fentry_skel = fentry_test_lskel__open_and_load();
46	if (!ASSERT_OK_PTR(fentry_skel, "fentry_skel_load"))
47		goto cleanup;
48
49	err = fentry_test(fentry_skel);
50	if (!ASSERT_OK(err, "fentry_first_attach"))
51		goto cleanup;
52
53	err = fentry_test(fentry_skel);
54	ASSERT_OK(err, "fentry_second_attach");
55
56cleanup:
57	fentry_test_lskel__destroy(fentry_skel);
58}