LXR iproute2/include/bpf

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __BPF_ELF__
   3#define __BPF_ELF__
   4
   5#include <asm/types.h>
   6
   7/* Note:
   8 *
   9 * Below ELF section names and bpf_elf_map structure definition
  10 * are not (!) kernel ABI. It's rather a "contract" between the
  11 * application and the BPF loader in tc. For compatibility, the
  12 * section names should stay as-is. Introduction of aliases, if
  13 * needed, are a possibility, though.
  14 */
  15
  16/* ELF section names, etc */
  17#define ELF_SECTION_LICENSE     "license"
  18#define ELF_SECTION_MAPS        "maps"
  19#define ELF_SECTION_PROG        "prog"
  20#define ELF_SECTION_CLASSIFIER  "classifier"
  21#define ELF_SECTION_ACTION      "action"
  22
  23#define ELF_MAX_MAPS            64
  24#define ELF_MAX_LICENSE_LEN     128
  25
  26/* Object pinning settings */
  27#define PIN_NONE                0
  28#define PIN_OBJECT_NS           1
  29#define PIN_GLOBAL_NS           2
  30
  31/* ELF map definition */
  32struct bpf_elf_map {
  33        __u32 type;
  34        __u32 size_key;
  35        __u32 size_value;
  36        __u32 max_elem;
  37        __u32 flags;
  38        __u32 id;
  39        __u32 pinning;
  40        __u32 inner_id;
  41        __u32 inner_idx;
  42};
  43
  44#define BPF_ANNOTATE_KV_PAIR(name, type_key, type_val)          \
  45        struct ____btf_map_##name {                             \
  46                type_key key;                                   \
  47                type_val value;                                 \
  48        };                                                      \
  49        struct ____btf_map_##name                               \
  50            __attribute__ ((section(".maps." #name), used))     \
  51            ____btf_map_##name = { }
  52
  53#endif /* __BPF_ELF__ */
  54