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}

 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
 8static int duration;
 9
10void test_ksyms(void)
11{
12	const char *btf_path = "/sys/kernel/btf/vmlinux";
13	struct test_ksyms *skel;
14	struct test_ksyms__data *data;
15	__u64 link_fops_addr, per_cpu_start_addr;
16	struct stat st;
17	__u64 btf_size;
18	int err;
19
20	err = kallsyms_find("bpf_link_fops", &link_fops_addr);
21	if (CHECK(err == -EINVAL, "kallsyms_fopen", "failed to open: %d\n", errno))
22		return;
23	if (CHECK(err == -ENOENT, "ksym_find", "symbol 'bpf_link_fops' not found\n"))
24		return;
25
26	err = kallsyms_find("__per_cpu_start", &per_cpu_start_addr);
27	if (CHECK(err == -EINVAL, "kallsyms_fopen", "failed to open: %d\n", errno))
28		return;
29	if (CHECK(err == -ENOENT, "ksym_find", "symbol 'per_cpu_start' not found\n"))
30		return;
31
32	if (CHECK(stat(btf_path, &st), "stat_btf", "err %d\n", errno))
33		return;
34	btf_size = st.st_size;
35
36	skel = test_ksyms__open_and_load();
37	if (CHECK(!skel, "skel_open", "failed to open and load skeleton\n"))
38		return;
39
40	err = test_ksyms__attach(skel);
41	if (CHECK(err, "skel_attach", "skeleton attach failed: %d\n", err))
42		goto cleanup;
43
44	/* trigger tracepoint */
45	usleep(1);
46
47	data = skel->data;
48	CHECK(data->out__bpf_link_fops != link_fops_addr, "bpf_link_fops",
49	      "got 0x%llx, exp 0x%llx\n",
50	      data->out__bpf_link_fops, link_fops_addr);
51	CHECK(data->out__bpf_link_fops1 != 0, "bpf_link_fops1",
52	      "got %llu, exp %llu\n", data->out__bpf_link_fops1, (__u64)0);
53	CHECK(data->out__btf_size != btf_size, "btf_size",
54	      "got %llu, exp %llu\n", data->out__btf_size, btf_size);
55	CHECK(data->out__per_cpu_start != per_cpu_start_addr, "__per_cpu_start",
56	      "got %llu, exp %llu\n", data->out__per_cpu_start,
57	      per_cpu_start_addr);
58
59cleanup:
60	test_ksyms__destroy(skel);
61}