1
2
3#include <stdio.h>
4#include <errno.h>
5#include <string.h>
6
7#include <bpf/bpf.h>
8#include <bpf/libbpf.h>
9
10#include <test_maps.h>
11
12static int nr_cpus;
13
14static void map_batch_update(int map_fd, __u32 max_entries, int *keys,
15 __s64 *values, bool is_pcpu)
16{
17 int i, j, err;
18 int cpu_offset = 0;
19 DECLARE_LIBBPF_OPTS(bpf_map_batch_opts, opts,
20 .elem_flags = 0,
21 .flags = 0,
22 );
23
24 for (i = 0; i < max_entries; i++) {
25 keys[i] = i;
26 if (is_pcpu) {
27 cpu_offset = i * nr_cpus;
28 for (j = 0; j < nr_cpus; j++)
29 (values + cpu_offset)[j] = i + 1 + j;
30 } else {
31 values[i] = i + 1;
32 }
33 }
34
35 err = bpf_map_update_batch(map_fd, keys, values, &max_entries, &opts);
36 CHECK(err, "bpf_map_update_batch()", "error:%s\n", strerror(errno));
37}
38
39static void map_batch_verify(int *visited, __u32 max_entries, int *keys,
40 __s64 *values, bool is_pcpu)
41{
42 int i, j;
43 int cpu_offset = 0;
44
45 memset(visited, 0, max_entries * sizeof(*visited));
46 for (i = 0; i < max_entries; i++) {
47 if (is_pcpu) {
48 cpu_offset = i * nr_cpus;
49 for (j = 0; j < nr_cpus; j++) {
50 __s64 value = (values + cpu_offset)[j];
51 CHECK(keys[i] + j + 1 != value,
52 "key/value checking",
53 "error: i %d j %d key %d value %lld\n", i,
54 j, keys[i], value);
55 }
56 } else {
57 CHECK(keys[i] + 1 != values[i], "key/value checking",
58 "error: i %d key %d value %lld\n", i, keys[i],
59 values[i]);
60 }
61 visited[i] = 1;
62 }
63 for (i = 0; i < max_entries; i++) {
64 CHECK(visited[i] != 1, "visited checking",
65 "error: keys array at index %d missing\n", i);
66 }
67}
68
69static void __test_map_lookup_and_update_batch(bool is_pcpu)
70{
71 struct bpf_create_map_attr xattr = {
72 .name = "array_map",
73 .map_type = is_pcpu ? BPF_MAP_TYPE_PERCPU_ARRAY :
74 BPF_MAP_TYPE_ARRAY,
75 .key_size = sizeof(int),
76 .value_size = sizeof(__s64),
77 };
78 int map_fd, *keys, *visited;
79 __u32 count, total, total_success;
80 const __u32 max_entries = 10;
81 __u64 batch = 0;
82 int err, step, value_size;
83 void *values;
84 DECLARE_LIBBPF_OPTS(bpf_map_batch_opts, opts,
85 .elem_flags = 0,
86 .flags = 0,
87 );
88
89 xattr.max_entries = max_entries;
90 map_fd = bpf_create_map_xattr(&xattr);
91 CHECK(map_fd == -1,
92 "bpf_create_map_xattr()", "error:%s\n", strerror(errno));
93
94 value_size = sizeof(__s64);
95 if (is_pcpu)
96 value_size *= nr_cpus;
97
98 keys = calloc(max_entries, sizeof(*keys));
99 values = calloc(max_entries, value_size);
100 visited = calloc(max_entries, sizeof(*visited));
101 CHECK(!keys || !values || !visited, "malloc()", "error:%s\n",
102 strerror(errno));
103
104
105 total_success = 0;
106 for (step = 1; step < max_entries; step++) {
107 map_batch_update(map_fd, max_entries, keys, values, is_pcpu);
108 map_batch_verify(visited, max_entries, keys, values, is_pcpu);
109 memset(keys, 0, max_entries * sizeof(*keys));
110 memset(values, 0, max_entries * value_size);
111 batch = 0;
112 total = 0;
113
114
115
116 count = step;
117 while (true) {
118 err = bpf_map_lookup_batch(map_fd,
119 total ? &batch : NULL,
120 &batch, keys + total,
121 values + total * value_size,
122 &count, &opts);
123
124 CHECK((err && errno != ENOENT), "lookup with steps",
125 "error: %s\n", strerror(errno));
126
127 total += count;
128 if (err)
129 break;
130
131 }
132
133 CHECK(total != max_entries, "lookup with steps",
134 "total = %u, max_entries = %u\n", total, max_entries);
135
136 map_batch_verify(visited, max_entries, keys, values, is_pcpu);
137
138 total_success++;
139 }
140
141 CHECK(total_success == 0, "check total_success",
142 "unexpected failure\n");
143
144 free(keys);
145 free(values);
146 free(visited);
147}
148
149static void array_map_batch_ops(void)
150{
151 __test_map_lookup_and_update_batch(false);
152 printf("test_%s:PASS\n", __func__);
153}
154
155static void array_percpu_map_batch_ops(void)
156{
157 __test_map_lookup_and_update_batch(true);
158 printf("test_%s:PASS\n", __func__);
159}
160
161void test_array_map_batch_ops(void)
162{
163 nr_cpus = libbpf_num_possible_cpus();
164
165 CHECK(nr_cpus < 0, "nr_cpus checking",
166 "error: get possible cpus failed");
167
168 array_map_batch_ops();
169 array_percpu_map_batch_ops();
170}
171
