1 // SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
3 #include "util/bpf_map.h"
5 #include <bpf/libbpf.h>
7 #include <linux/kernel.h>
12 static bool bpf_map_def__is_per_cpu(const struct bpf_map_def *def)
14 return def->type == BPF_MAP_TYPE_PERCPU_HASH ||
15 def->type == BPF_MAP_TYPE_PERCPU_ARRAY ||
16 def->type == BPF_MAP_TYPE_LRU_PERCPU_HASH ||
17 def->type == BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE;
20 static void *bpf_map_def__alloc_value(const struct bpf_map_def *def)
22 if (bpf_map_def__is_per_cpu(def))
23 return malloc(round_up(def->value_size, 8) * sysconf(_SC_NPROCESSORS_CONF));
25 return malloc(def->value_size);
28 int bpf_map__fprintf(struct bpf_map *map, FILE *fp)
30 const struct bpf_map_def *def = bpf_map__def(map);
31 void *prev_key = NULL, *key, *value;
32 int fd = bpf_map__fd(map), err;
42 key = malloc(def->key_size);
46 value = bpf_map_def__alloc_value(def);
50 while ((err = bpf_map_get_next_key(fd, prev_key, key) == 0)) {
51 int intkey = *(int *)key;
53 if (!bpf_map_lookup_elem(fd, key, value)) {
54 bool boolval = *(bool *)value;
56 printed += fprintf(fp, "[%d] = %d,\n", intkey, boolval);
58 printed += fprintf(fp, "[%d] = ERROR,\n", intkey);