1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright (c) 2019 Facebook */
 3
 4#include <test_progs.h>
 5#include "test_ksyms.skel.h"
 6#include <sys/stat.h>
 7
 8void test_ksyms(void)
 9{
10	const char *btf_path = "/sys/kernel/btf/vmlinux";
11	struct test_ksyms *skel;
12	struct test_ksyms__data *data;
13	__u64 link_fops_addr, per_cpu_start_addr;
14	struct stat st;
15	__u64 btf_size;
16	int err;
17
18	err = kallsyms_find("bpf_link_fops", &link_fops_addr);
19	if (!ASSERT_NEQ(err, -EINVAL, "bpf_link_fops: kallsyms_fopen"))
20		return;
21	if (!ASSERT_NEQ(err, -ENOENT, "bpf_link_fops: ksym_find"))
22		return;
23
24	err = kallsyms_find("__per_cpu_start", &per_cpu_start_addr);
25	if (!ASSERT_NEQ(err, -EINVAL, "__per_cpu_start: kallsyms_fopen"))
26		return;
27	if (!ASSERT_NEQ(err, -ENOENT, "__per_cpu_start: ksym_find"))
28		return;
29
30	if (!ASSERT_OK(stat(btf_path, &st), "stat_btf"))
31		return;
32	btf_size = st.st_size;
33
34	skel = test_ksyms__open_and_load();
35	if (!ASSERT_OK_PTR(skel, "test_ksyms__open_and_load"))
36		return;
37
38	err = test_ksyms__attach(skel);
39	if (!ASSERT_OK(err, "test_ksyms__attach"))
40		goto cleanup;
41
42	/* trigger tracepoint */
43	usleep(1);
44
45	data = skel->data;
46	ASSERT_EQ(data->out__bpf_link_fops, link_fops_addr, "bpf_link_fops");
47	ASSERT_EQ(data->out__bpf_link_fops1, 0, "bpf_link_fops1");
48	ASSERT_EQ(data->out__btf_size, btf_size, "btf_size");
49	ASSERT_EQ(data->out__per_cpu_start, per_cpu_start_addr, "__per_cpu_start");
50
51cleanup:
52	test_ksyms__destroy(skel);
53}