1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2020 Google */
#include <test_progs.h>
#include <bpf/libbpf.h>
#include <bpf/btf.h>
#include "test_ksyms_btf.skel.h"
#include "test_ksyms_btf_null_check.skel.h"
static int duration;
static void test_basic(void)
{
__u64 runqueues_addr, bpf_prog_active_addr;
__u32 this_rq_cpu;
int this_bpf_prog_active;
struct test_ksyms_btf *skel = NULL;
struct test_ksyms_btf__data *data;
int err;
err = kallsyms_find("runqueues", &runqueues_addr);
if (CHECK(err == -EINVAL, "kallsyms_fopen", "failed to open: %d\n", errno))
return;
if (CHECK(err == -ENOENT, "ksym_find", "symbol 'runqueues' not found\n"))
return;
err = kallsyms_find("bpf_prog_active", &bpf_prog_active_addr);
if (CHECK(err == -EINVAL, "kallsyms_fopen", "failed to open: %d\n", errno))
return;
if (CHECK(err == -ENOENT, "ksym_find", "symbol 'bpf_prog_active' not found\n"))
return;
skel = test_ksyms_btf__open_and_load();
if (CHECK(!skel, "skel_open", "failed to open and load skeleton\n"))
goto cleanup;
err = test_ksyms_btf__attach(skel);
if (CHECK(err, "skel_attach", "skeleton attach failed: %d\n", err))
goto cleanup;
/* trigger tracepoint */
usleep(1);
data = skel->data;
CHECK(data->out__runqueues_addr != runqueues_addr, "runqueues_addr",
"got %llu, exp %llu\n",
(unsigned long long)data->out__runqueues_addr,
(unsigned long long)runqueues_addr);
CHECK(data->out__bpf_prog_active_addr != bpf_prog_active_addr, "bpf_prog_active_addr",
"got %llu, exp %llu\n",
(unsigned long long)data->out__bpf_prog_active_addr,
(unsigned long long)bpf_prog_active_addr);
CHECK(data->out__rq_cpu == -1, "rq_cpu",
"got %u, exp != -1\n", data->out__rq_cpu);
CHECK(data->out__bpf_prog_active < 0, "bpf_prog_active",
"got %d, exp >= 0\n", data->out__bpf_prog_active);
CHECK(data->out__cpu_0_rq_cpu != 0, "cpu_rq(0)->cpu",
"got %u, exp 0\n", data->out__cpu_0_rq_cpu);
this_rq_cpu = data->out__this_rq_cpu;
CHECK(this_rq_cpu != data->out__rq_cpu, "this_rq_cpu",
"got %u, exp %u\n", this_rq_cpu, data->out__rq_cpu);
this_bpf_prog_active = data->out__this_bpf_prog_active;
CHECK(this_bpf_prog_active != data->out__bpf_prog_active, "this_bpf_prog_active",
"got %d, exp %d\n", this_bpf_prog_active,
data->out__bpf_prog_active);
cleanup:
test_ksyms_btf__destroy(skel);
}
static void test_null_check(void)
{
struct test_ksyms_btf_null_check *skel;
skel = test_ksyms_btf_null_check__open_and_load();
CHECK(skel, "skel_open", "unexpected load of a prog missing null check\n");
test_ksyms_btf_null_check__destroy(skel);
}
void test_ksyms_btf(void)
{
int percpu_datasec;
struct btf *btf;
btf = libbpf_find_kernel_btf();
if (!ASSERT_OK_PTR(btf, "btf_exists"))
return;
percpu_datasec = btf__find_by_name_kind(btf, ".data..percpu",
BTF_KIND_DATASEC);
btf__free(btf);
if (percpu_datasec < 0) {
printf("%s:SKIP:no PERCPU DATASEC in kernel btf\n",
__func__);
test__skip();
return;
}
if (test__start_subtest("basic"))
test_basic();
if (test__start_subtest("null_check"))
test_null_check();
}
|
