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
|
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2019 Facebook */
#include <test_progs.h>
/* that's kernel internal BPF_MAX_TRAMP_PROGS define */
#define CNT 38
void test_fexit_stress(void)
{
char test_skb[128] = {};
int fexit_fd[CNT] = {};
int link_fd[CNT] = {};
__u32 duration = 0;
char error[4096];
__u32 prog_ret;
int err, i, filter_fd;
const struct bpf_insn trace_program[] = {
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
};
struct bpf_load_program_attr load_attr = {
.prog_type = BPF_PROG_TYPE_TRACING,
.license = "GPL",
.insns = trace_program,
.insns_cnt = sizeof(trace_program) / sizeof(struct bpf_insn),
.expected_attach_type = BPF_TRACE_FEXIT,
};
const struct bpf_insn skb_program[] = {
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
};
struct bpf_load_program_attr skb_load_attr = {
.prog_type = BPF_PROG_TYPE_SOCKET_FILTER,
.license = "GPL",
.insns = skb_program,
.insns_cnt = sizeof(skb_program) / sizeof(struct bpf_insn),
};
err = libbpf_find_vmlinux_btf_id("bpf_fentry_test1",
load_attr.expected_attach_type);
if (CHECK(err <= 0, "find_vmlinux_btf_id", "failed: %d\n", err))
goto out;
load_attr.attach_btf_id = err;
for (i = 0; i < CNT; i++) {
fexit_fd[i] = bpf_load_program_xattr(&load_attr, error, sizeof(error));
if (CHECK(fexit_fd[i] < 0, "fexit loaded",
"failed: %d errno %d\n", fexit_fd[i], errno))
goto out;
link_fd[i] = bpf_raw_tracepoint_open(NULL, fexit_fd[i]);
if (CHECK(link_fd[i] < 0, "fexit attach failed",
"prog %d failed: %d err %d\n", i, link_fd[i], errno))
goto out;
}
filter_fd = bpf_load_program_xattr(&skb_load_attr, error, sizeof(error));
if (CHECK(filter_fd < 0, "test_program_loaded", "failed: %d errno %d\n",
filter_fd, errno))
goto out;
err = bpf_prog_test_run(filter_fd, 1, test_skb, sizeof(test_skb), 0,
0, &prog_ret, 0);
close(filter_fd);
CHECK_FAIL(err);
out:
for (i = 0; i < CNT; i++) {
if (link_fd[i])
close(link_fd[i]);
if (fexit_fd[i])
close(fexit_fd[i]);
}
}
|
