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#include <bpf/bpf.h>
#include <sys/mman.h>
#include "zdtmtst.h"
#include "bpfmap_zdtm.h"
#ifndef LIBBPF_OPTS
#define LIBBPF_OPTS DECLARE_LIBBPF_OPTS
#define LEGACY_LIBBPF /* Using libbpf < 0.7 */
#endif
const char *test_doc = "Check that data and meta-data for BPF_MAP_TYPE_ARRAY"
"is correctly restored";
const char *test_author = "Abhishek Vijeev <abhishek.vijeev@gmail.com>";
static int map_batch_update(int map_fd, uint32_t max_entries, int *keys, int *values)
{
int i, ret;
LIBBPF_OPTS(bpf_map_batch_opts, opts);
for (i = 0; i < max_entries; i++) {
keys[i] = i;
values[i] = i + 1;
}
ret = bpf_map_update_batch(map_fd, keys, values, &max_entries, &opts);
if (ret && errno != ENOENT) {
pr_perror("Can't load key-value pairs to BPF map fd");
return -1;
}
return 0;
}
static int map_batch_verify(int *visited, uint32_t max_entries, int *keys, int *values)
{
int i;
memset(visited, 0, max_entries * sizeof(*visited));
for (i = 0; i < max_entries; i++) {
if (keys[i] + 1 != values[i]) {
pr_err("Key/value checking error: i=%d, key=%d, value=%d\n", i, keys[i], values[i]);
return -1;
}
visited[i] = 1;
}
for (i = 0; i < max_entries; i++) {
if (visited[i] != 1) {
pr_err("Visited checking error: keys array at index %d missing\n", i);
return -1;
}
}
return 0;
}
int main(int argc, char **argv)
{
uint32_t batch, count;
int map_fd;
int *keys = NULL, *values = NULL, *visited = NULL;
const uint32_t max_entries = 10;
int ret;
struct bpf_map_info old_map_info = {};
struct bpf_map_info new_map_info = {};
struct bpfmap_fdinfo_obj old_fdinfo = {};
struct bpfmap_fdinfo_obj new_fdinfo = {};
uint32_t info_len = sizeof(struct bpf_map_info);
#ifdef LEGACY_LIBBPF
struct bpf_create_map_attr xattr = {
.name = "array_test_map",
.map_type = BPF_MAP_TYPE_ARRAY,
.key_size = sizeof(int),
.value_size = sizeof(int),
.max_entries = max_entries,
.map_flags = BPF_F_NUMA_NODE,
};
#else
LIBBPF_OPTS(bpf_map_create_opts, bpf_mapfd_opts, .map_flags = BPF_F_NUMA_NODE);
#endif
LIBBPF_OPTS(bpf_map_batch_opts, opts);
keys = mmap(NULL, max_entries * sizeof(int), PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0);
values = mmap(NULL, max_entries * sizeof(int), PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0);
visited = mmap(NULL, max_entries * sizeof(int), PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0);
if ((keys == MAP_FAILED) || (values == MAP_FAILED) || (visited == MAP_FAILED)) {
pr_perror("Can't mmap()");
goto err;
}
test_init(argc, argv);
#ifdef LEGACY_LIBBPF
map_fd = bpf_create_map_xattr(&xattr);
#else
map_fd = bpf_map_create(BPF_MAP_TYPE_ARRAY, "array_test_map", sizeof(int), sizeof(int), max_entries,
&bpf_mapfd_opts);
#endif
if (map_fd == -1) {
pr_perror("Can't create BPF map");
goto err;
}
if (map_batch_update(map_fd, max_entries, keys, values))
goto err;
ret = bpf_map_freeze(map_fd);
if (ret) {
pr_perror("Could not freeze map");
goto err;
}
ret = bpf_obj_get_info_by_fd(map_fd, &old_map_info, &info_len);
if (ret) {
pr_perror("Could not get old map info");
goto err;
}
ret = parse_bpfmap_fdinfo(map_fd, &old_fdinfo, 8);
if (ret) {
pr_perror("Could not parse old map fdinfo from procfs");
goto err;
}
test_daemon();
test_waitsig();
ret = bpf_obj_get_info_by_fd(map_fd, &new_map_info, &info_len);
if (ret) {
pr_perror("Could not get new map info");
goto err;
}
ret = parse_bpfmap_fdinfo(map_fd, &new_fdinfo, 8);
if (ret) {
pr_perror("Could not parse new map fdinfo from procfs");
goto err;
}
if (cmp_bpf_map_info(&old_map_info, &new_map_info)) {
pr_err("bpf_map_info mismatch\n");
goto err;
}
if (cmp_bpfmap_fdinfo(&old_fdinfo, &new_fdinfo)) {
pr_err("bpfmap fdinfo mismatch\n");
goto err;
}
memset(keys, 0, max_entries * sizeof(*keys));
memset(values, 0, max_entries * sizeof(*values));
ret = bpf_map_lookup_batch(map_fd, NULL, &batch, keys, values, &count, &opts);
if (ret && errno != ENOENT) {
pr_perror("Can't perform a batch lookup on BPF map");
goto err;
}
if (map_batch_verify(visited, max_entries, keys, values))
goto err;
munmap(keys, max_entries * sizeof(int));
munmap(values, max_entries * sizeof(int));
munmap(visited, max_entries * sizeof(int));
pass();
return 0;
err:
munmap(keys, max_entries * sizeof(int));
munmap(values, max_entries * sizeof(int));
munmap(visited, max_entries * sizeof(int));
fail();
return 1;
}
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