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// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <bpf/bpf.h>
#include <bpf/libbpf.h>
#include <test_maps.h>
static int nr_cpus;
static void map_batch_update(int map_fd, __u32 max_entries, int *keys,
__s64 *values, bool is_pcpu)
{
int i, j, err;
int cpu_offset = 0;
DECLARE_LIBBPF_OPTS(bpf_map_batch_opts, opts,
.elem_flags = 0,
.flags = 0,
);
for (i = 0; i < max_entries; i++) {
keys[i] = i;
if (is_pcpu) {
cpu_offset = i * nr_cpus;
for (j = 0; j < nr_cpus; j++)
(values + cpu_offset)[j] = i + 1 + j;
} else {
values[i] = i + 1;
}
}
err = bpf_map_update_batch(map_fd, keys, values, &max_entries, &opts);
CHECK(err, "bpf_map_update_batch()", "error:%s\n", strerror(errno));
}
static void map_batch_verify(int *visited, __u32 max_entries, int *keys,
__s64 *values, bool is_pcpu)
{
int i, j;
int cpu_offset = 0;
memset(visited, 0, max_entries * sizeof(*visited));
for (i = 0; i < max_entries; i++) {
if (is_pcpu) {
cpu_offset = i * nr_cpus;
for (j = 0; j < nr_cpus; j++) {
__s64 value = (values + cpu_offset)[j];
CHECK(keys[i] + j + 1 != value,
"key/value checking",
"error: i %d j %d key %d value %lld\n", i,
j, keys[i], value);
}
} else {
CHECK(keys[i] + 1 != values[i], "key/value checking",
"error: i %d key %d value %lld\n", i, keys[i],
values[i]);
}
visited[i] = 1;
}
for (i = 0; i < max_entries; i++) {
CHECK(visited[i] != 1, "visited checking",
"error: keys array at index %d missing\n", i);
}
}
static void __test_map_lookup_and_update_batch(bool is_pcpu)
{
int map_fd, *keys, *visited;
__u32 count, total, total_success;
const __u32 max_entries = 10;
__u64 batch = 0;
int err, step, value_size;
void *values;
DECLARE_LIBBPF_OPTS(bpf_map_batch_opts, opts,
.elem_flags = 0,
.flags = 0,
);
map_fd = bpf_map_create(is_pcpu ? BPF_MAP_TYPE_PERCPU_ARRAY : BPF_MAP_TYPE_ARRAY,
"array_map", sizeof(int), sizeof(__s64), max_entries, NULL);
CHECK(map_fd == -1,
"bpf_map_create()", "error:%s\n", strerror(errno));
value_size = sizeof(__s64);
if (is_pcpu)
value_size *= nr_cpus;
keys = calloc(max_entries, sizeof(*keys));
values = calloc(max_entries, value_size);
visited = calloc(max_entries, sizeof(*visited));
CHECK(!keys || !values || !visited, "malloc()", "error:%s\n",
strerror(errno));
/* test 1: lookup in a loop with various steps. */
total_success = 0;
for (step = 1; step < max_entries; step++) {
map_batch_update(map_fd, max_entries, keys, values, is_pcpu);
map_batch_verify(visited, max_entries, keys, values, is_pcpu);
memset(keys, 0, max_entries * sizeof(*keys));
memset(values, 0, max_entries * value_size);
batch = 0;
total = 0;
/* iteratively lookup/delete elements with 'step'
* elements each.
*/
count = step;
while (true) {
err = bpf_map_lookup_batch(map_fd,
total ? &batch : NULL,
&batch, keys + total,
values + total * value_size,
&count, &opts);
CHECK((err && errno != ENOENT), "lookup with steps",
"error: %s\n", strerror(errno));
total += count;
if (err)
break;
}
CHECK(total != max_entries, "lookup with steps",
"total = %u, max_entries = %u\n", total, max_entries);
map_batch_verify(visited, max_entries, keys, values, is_pcpu);
total_success++;
}
CHECK(total_success == 0, "check total_success",
"unexpected failure\n");
free(keys);
free(values);
free(visited);
}
static void array_map_batch_ops(void)
{
__test_map_lookup_and_update_batch(false);
printf("test_%s:PASS\n", __func__);
}
static void array_percpu_map_batch_ops(void)
{
__test_map_lookup_and_update_batch(true);
printf("test_%s:PASS\n", __func__);
}
void test_array_map_batch_ops(void)
{
nr_cpus = libbpf_num_possible_cpus();
CHECK(nr_cpus < 0, "nr_cpus checking",
"error: get possible cpus failed");
array_map_batch_ops();
array_percpu_map_batch_ops();
}
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