LXR linux/samples/bpf/bpf

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __BPF_LOAD_H
   3#define __BPF_LOAD_H
   4
   5#include <bpf/bpf.h>
   6
   7#define MAX_MAPS 32
   8#define MAX_PROGS 32
   9
  10struct bpf_load_map_def {
  11        unsigned int type;
  12        unsigned int key_size;
  13        unsigned int value_size;
  14        unsigned int max_entries;
  15        unsigned int map_flags;
  16        unsigned int inner_map_idx;
  17        unsigned int numa_node;
  18};
  19
  20struct bpf_map_data {
  21        int fd;
  22        char *name;
  23        size_t elf_offset;
  24        struct bpf_load_map_def def;
  25};
  26
  27typedef void (*fixup_map_cb)(struct bpf_map_data *map, int idx);
  28
  29extern int prog_fd[MAX_PROGS];
  30extern int event_fd[MAX_PROGS];
  31extern char bpf_log_buf[BPF_LOG_BUF_SIZE];
  32extern int prog_cnt;
  33
  34/* There is a one-to-one mapping between map_fd[] and map_data[].
  35 * The map_data[] just contains more rich info on the given map.
  36 */
  37extern int map_fd[MAX_MAPS];
  38extern struct bpf_map_data map_data[MAX_MAPS];
  39extern int map_data_count;
  40
  41/* parses elf file compiled by llvm .c->.o
  42 * . parses 'maps' section and creates maps via BPF syscall
  43 * . parses 'license' section and passes it to syscall
  44 * . parses elf relocations for BPF maps and adjusts BPF_LD_IMM64 insns by
  45 *   storing map_fd into insn->imm and marking such insns as BPF_PSEUDO_MAP_FD
  46 * . loads eBPF programs via BPF syscall
  47 *
  48 * One ELF file can contain multiple BPF programs which will be loaded
  49 * and their FDs stored stored in prog_fd array
  50 *
  51 * returns zero on success
  52 */
  53int load_bpf_file(char *path);
  54int load_bpf_file_fixup_map(const char *path, fixup_map_cb fixup_map);
  55
  56int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags);
  57#endif
  58