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
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2021 Facebook */
#include <test_progs.h>
#include <network_helpers.h>
#include "for_each_hash_map_elem.skel.h"
#include "for_each_array_map_elem.skel.h"
static unsigned int duration;
static void test_hash_map(void)
{
int i, err, hashmap_fd, max_entries, percpu_map_fd;
struct for_each_hash_map_elem *skel;
__u64 *percpu_valbuf = NULL;
__u32 key, num_cpus, retval;
__u64 val;
skel = for_each_hash_map_elem__open_and_load();
if (!ASSERT_OK_PTR(skel, "for_each_hash_map_elem__open_and_load"))
return;
hashmap_fd = bpf_map__fd(skel->maps.hashmap);
max_entries = bpf_map__max_entries(skel->maps.hashmap);
for (i = 0; i < max_entries; i++) {
key = i;
val = i + 1;
err = bpf_map_update_elem(hashmap_fd, &key, &val, BPF_ANY);
if (!ASSERT_OK(err, "map_update"))
goto out;
}
num_cpus = bpf_num_possible_cpus();
percpu_map_fd = bpf_map__fd(skel->maps.percpu_map);
percpu_valbuf = malloc(sizeof(__u64) * num_cpus);
if (!ASSERT_OK_PTR(percpu_valbuf, "percpu_valbuf"))
goto out;
key = 1;
for (i = 0; i < num_cpus; i++)
percpu_valbuf[i] = i + 1;
err = bpf_map_update_elem(percpu_map_fd, &key, percpu_valbuf, BPF_ANY);
if (!ASSERT_OK(err, "percpu_map_update"))
goto out;
err = bpf_prog_test_run(bpf_program__fd(skel->progs.test_pkt_access),
1, &pkt_v4, sizeof(pkt_v4), NULL, NULL,
&retval, &duration);
if (CHECK(err || retval, "ipv4", "err %d errno %d retval %d\n",
err, errno, retval))
goto out;
ASSERT_EQ(skel->bss->hashmap_output, 4, "hashmap_output");
ASSERT_EQ(skel->bss->hashmap_elems, max_entries, "hashmap_elems");
key = 1;
err = bpf_map_lookup_elem(hashmap_fd, &key, &val);
ASSERT_ERR(err, "hashmap_lookup");
ASSERT_EQ(skel->bss->percpu_called, 1, "percpu_called");
ASSERT_LT(skel->bss->cpu, num_cpus, "num_cpus");
ASSERT_EQ(skel->bss->percpu_map_elems, 1, "percpu_map_elems");
ASSERT_EQ(skel->bss->percpu_key, 1, "percpu_key");
ASSERT_EQ(skel->bss->percpu_val, skel->bss->cpu + 1, "percpu_val");
ASSERT_EQ(skel->bss->percpu_output, 100, "percpu_output");
out:
free(percpu_valbuf);
for_each_hash_map_elem__destroy(skel);
}
static void test_array_map(void)
{
__u32 key, num_cpus, max_entries, retval;
int i, arraymap_fd, percpu_map_fd, err;
struct for_each_array_map_elem *skel;
__u64 *percpu_valbuf = NULL;
__u64 val, expected_total;
skel = for_each_array_map_elem__open_and_load();
if (!ASSERT_OK_PTR(skel, "for_each_array_map_elem__open_and_load"))
return;
arraymap_fd = bpf_map__fd(skel->maps.arraymap);
expected_total = 0;
max_entries = bpf_map__max_entries(skel->maps.arraymap);
for (i = 0; i < max_entries; i++) {
key = i;
val = i + 1;
/* skip the last iteration for expected total */
if (i != max_entries - 1)
expected_total += val;
err = bpf_map_update_elem(arraymap_fd, &key, &val, BPF_ANY);
if (!ASSERT_OK(err, "map_update"))
goto out;
}
num_cpus = bpf_num_possible_cpus();
percpu_map_fd = bpf_map__fd(skel->maps.percpu_map);
percpu_valbuf = malloc(sizeof(__u64) * num_cpus);
if (!ASSERT_OK_PTR(percpu_valbuf, "percpu_valbuf"))
goto out;
key = 0;
for (i = 0; i < num_cpus; i++)
percpu_valbuf[i] = i + 1;
err = bpf_map_update_elem(percpu_map_fd, &key, percpu_valbuf, BPF_ANY);
if (!ASSERT_OK(err, "percpu_map_update"))
goto out;
err = bpf_prog_test_run(bpf_program__fd(skel->progs.test_pkt_access),
1, &pkt_v4, sizeof(pkt_v4), NULL, NULL,
&retval, &duration);
if (CHECK(err || retval, "ipv4", "err %d errno %d retval %d\n",
err, errno, retval))
goto out;
ASSERT_EQ(skel->bss->arraymap_output, expected_total, "array_output");
ASSERT_EQ(skel->bss->cpu + 1, skel->bss->percpu_val, "percpu_val");
out:
free(percpu_valbuf);
for_each_array_map_elem__destroy(skel);
}
void test_for_each(void)
{
if (test__start_subtest("hash_map"))
test_hash_map();
if (test__start_subtest("array_map"))
test_array_map();
}
|
