73 lines
1.6 KiB
C
73 lines
1.6 KiB
C
|
// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
|
||
|
|
|
||
|
|
#include "util/bpf_map.h"
|
||
|
|
#include <bpf/bpf.h>
|
||
|
|
#include <bpf/libbpf.h>
|
||
|
|
#include <linux/err.h>
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <stdbool.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
|
||
|
|
static bool bpf_map_def__is_per_cpu(const struct bpf_map_def *def)
|
||
|
|
{
|
||
|
|
return def->type == BPF_MAP_TYPE_PERCPU_HASH ||
|
||
|
|
def->type == BPF_MAP_TYPE_PERCPU_ARRAY ||
|
||
|
|
def->type == BPF_MAP_TYPE_LRU_PERCPU_HASH ||
|
||
|
|
def->type == BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void *bpf_map_def__alloc_value(const struct bpf_map_def *def)
|
||
|
|
{
|
||
|
|
if (bpf_map_def__is_per_cpu(def))
|
||
|
|
return malloc(round_up(def->value_size, 8) * sysconf(_SC_NPROCESSORS_CONF));
|
||
|
|
|
||
|
|
return malloc(def->value_size);
|
||
|
|
}
|
||
|
|
|
||
|
|
int bpf_map__fprintf(struct bpf_map *map, FILE *fp)
|
||
|
|
{
|
||
|
|
const struct bpf_map_def *def = bpf_map__def(map);
|
||
|
|
void *prev_key = NULL, *key, *value;
|
||
|
|
int fd = bpf_map__fd(map), err;
|
||
|
|
int printed = 0;
|
||
|
|
|
||
|
|
if (fd < 0)
|
||
|
|
return fd;
|
||
|
|
|
||
|
|
if (IS_ERR(def))
|
||
|
|
return PTR_ERR(def);
|
||
|
|
|
||
|
|
err = -ENOMEM;
|
||
|
|
key = malloc(def->key_size);
|
||
|
|
if (key == NULL)
|
||
|
|
goto out;
|
||
|
|
|
||
|
|
value = bpf_map_def__alloc_value(def);
|
||
|
|
if (value == NULL)
|
||
|
|
goto out_free_key;
|
||
|
|
|
||
|
|
while ((err = bpf_map_get_next_key(fd, prev_key, key) == 0)) {
|
||
|
|
int intkey = *(int *)key;
|
||
|
|
|
||
|
|
if (!bpf_map_lookup_elem(fd, key, value)) {
|
||
|
|
bool boolval = *(bool *)value;
|
||
|
|
if (boolval)
|
||
|
|
printed += fprintf(fp, "[%d] = %d,\n", intkey, boolval);
|
||
|
|
} else {
|
||
|
|
printed += fprintf(fp, "[%d] = ERROR,\n", intkey);
|
||
|
|
}
|
||
|
|
|
||
|
|
prev_key = key;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (err == ENOENT)
|
||
|
|
err = printed;
|
||
|
|
|
||
|
|
free(value);
|
||
|
|
out_free_key:
|
||
|
|
free(key);
|
||
|
|
out:
|
||
|
|
return err;
|
||
|
|
}
|