tools/testing/selftests/bpf/bpf_legacy.h

   1 /* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
   2 #ifndef __BPF_LEGACY__
   3 #define __BPF_LEGACY__
   4
   5 /*
   6  * legacy bpf_map_def with extra fields supported only by bpf_load(), do not
   7  * use outside of samples/bpf
   8  */
   9 struct bpf_map_def_legacy {
  10         unsigned int type;
  11         unsigned int key_size;
  12         unsigned int value_size;
  13         unsigned int max_entries;
  14         unsigned int map_flags;
  15         unsigned int inner_map_idx;
  16         unsigned int numa_node;
  17 };
  18
  19 #define BPF_ANNOTATE_KV_PAIR(name, type_key, type_val)          \
  20         struct ____btf_map_##name {                             \
  21                 type_key key;                                   \
  22                 type_val value;                                 \
  23         };                                                      \
  24         struct ____btf_map_##name                               \
  25         __attribute__ ((section(".maps." #name), used))         \
  26                 ____btf_map_##name = { }
  27
  28 /* llvm builtin functions that eBPF C program may use to
  29  * emit BPF_LD_ABS and BPF_LD_IND instructions
  30  */
  31 unsigned long long load_byte(void *skb,
  32                              unsigned long long off) asm("llvm.bpf.load.byte");
  33 unsigned long long load_half(void *skb,
  34                              unsigned long long off) asm("llvm.bpf.load.half");
  35 unsigned long long load_word(void *skb,
  36                              unsigned long long off) asm("llvm.bpf.load.word");
  37
  38 #endif
  39