samples/bpf/bpf_load.h

   1 #ifndef __BPF_LOAD_H
   2 #define __BPF_LOAD_H
   3
   4 #define MAX_MAPS 32
   5 #define MAX_PROGS 32
   6
   7 extern int map_fd[MAX_MAPS];
   8 extern int prog_fd[MAX_PROGS];
   9
  10 /* parses elf file compiled by llvm .c->.o
  11  * . parses 'maps' section and creates maps via BPF syscall
  12  * . parses 'license' section and passes it to syscall
  13  * . parses elf relocations for BPF maps and adjusts BPF_LD_IMM64 insns by
  14  *   storing map_fd into insn->imm and marking such insns as BPF_PSEUDO_MAP_FD
  15  * . loads eBPF programs via BPF syscall
  16  *
  17  * One ELF file can contain multiple BPF programs which will be loaded
  18  * and their FDs stored stored in prog_fd array
  19  *
  20  * returns zero on success
  21  */
  22 int load_bpf_file(char *path);
  23
  24 #endif