LXR linux/samples/bpf/bpf

   1#ifndef __BPF_LOAD_H
   2#define __BPF_LOAD_H
   3
   4#include "libbpf.h"
   5
   6#define MAX_MAPS 32
   7#define MAX_PROGS 32
   8
   9struct bpf_map_def {
  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};
  17
  18struct bpf_map_data {
  19        int fd;
  20        char *name;
  21        size_t elf_offset;
  22        struct bpf_map_def def;
  23};
  24
  25typedef void (*fixup_map_cb)(struct bpf_map_data *map, int idx);
  26
  27extern int prog_fd[MAX_PROGS];
  28extern int event_fd[MAX_PROGS];
  29extern char bpf_log_buf[BPF_LOG_BUF_SIZE];
  30extern int prog_cnt;
  31
  32/* There is a one-to-one mapping between map_fd[] and map_data[].
  33 * The map_data[] just contains more rich info on the given map.
  34 */
  35extern int map_fd[MAX_MAPS];
  36extern struct bpf_map_data map_data[MAX_MAPS];
  37extern int map_data_count;
  38
  39/* parses elf file compiled by llvm .c->.o
  40 * . parses 'maps' section and creates maps via BPF syscall
  41 * . parses 'license' section and passes it to syscall
  42 * . parses elf relocations for BPF maps and adjusts BPF_LD_IMM64 insns by
  43 *   storing map_fd into insn->imm and marking such insns as BPF_PSEUDO_MAP_FD
  44 * . loads eBPF programs via BPF syscall
  45 *
  46 * One ELF file can contain multiple BPF programs which will be loaded
  47 * and their FDs stored stored in prog_fd array
  48 *
  49 * returns zero on success
  50 */
  51int load_bpf_file(char *path);
  52int load_bpf_file_fixup_map(const char *path, fixup_map_cb fixup_map);
  53
  54void read_trace_pipe(void);
  55struct ksym {
  56        long addr;
  57        char *name;
  58};
  59
  60int load_kallsyms(void);
  61struct ksym *ksym_search(long key);
  62int set_link_xdp_fd(int ifindex, int fd, __u32 flags);
  63#endif
  64