mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-28 21:33:52 +00:00
b1957c92eb
adding test/example of bpf_map__set_inner_map_fd usage Signed-off-by: Nikita V. Shirokov <tehnerd@tehnerd.com> Acked-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
49 lines
1 KiB
C
49 lines
1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* Copyright (c) 2018 Facebook */
|
|
#include <stddef.h>
|
|
#include <linux/bpf.h>
|
|
#include <linux/types.h>
|
|
#include "bpf_helpers.h"
|
|
|
|
struct bpf_map_def SEC("maps") mim_array = {
|
|
.type = BPF_MAP_TYPE_ARRAY_OF_MAPS,
|
|
.key_size = sizeof(int),
|
|
/* must be sizeof(__u32) for map in map */
|
|
.value_size = sizeof(__u32),
|
|
.max_entries = 1,
|
|
.map_flags = 0,
|
|
};
|
|
|
|
struct bpf_map_def SEC("maps") mim_hash = {
|
|
.type = BPF_MAP_TYPE_HASH_OF_MAPS,
|
|
.key_size = sizeof(int),
|
|
/* must be sizeof(__u32) for map in map */
|
|
.value_size = sizeof(__u32),
|
|
.max_entries = 1,
|
|
.map_flags = 0,
|
|
};
|
|
|
|
SEC("xdp_mimtest")
|
|
int xdp_mimtest0(struct xdp_md *ctx)
|
|
{
|
|
int value = 123;
|
|
int key = 0;
|
|
void *map;
|
|
|
|
map = bpf_map_lookup_elem(&mim_array, &key);
|
|
if (!map)
|
|
return XDP_DROP;
|
|
|
|
bpf_map_update_elem(map, &key, &value, 0);
|
|
|
|
map = bpf_map_lookup_elem(&mim_hash, &key);
|
|
if (!map)
|
|
return XDP_DROP;
|
|
|
|
bpf_map_update_elem(map, &key, &value, 0);
|
|
|
|
return XDP_PASS;
|
|
}
|
|
|
|
int _version SEC("version") = 1;
|
|
char _license[] SEC("license") = "GPL";
|