samples/bpf/bpf_load.h

   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
   9 extern int map_fd[MAX_MAPS];
  10 extern int prog_fd[MAX_PROGS];
  11 extern int event_fd[MAX_PROGS];
  12 extern char bpf_log_buf[BPF_LOG_BUF_SIZE];
  13 extern int prog_cnt;
  14
  15 /* parses elf file compiled by llvm .c->.o
  16  * . parses 'maps' section and creates maps via BPF syscall
  17  * . parses 'license' section and passes it to syscall
  18  * . parses elf relocations for BPF maps and adjusts BPF_LD_IMM64 insns by
  19  *   storing map_fd into insn->imm and marking such insns as BPF_PSEUDO_MAP_FD
  20  * . loads eBPF programs via BPF syscall
  21  *
  22  * One ELF file can contain multiple BPF programs which will be loaded
  23  * and their FDs stored stored in prog_fd array
  24  *
  25  * returns zero on success
  26  */
  27 int load_bpf_file(char *path);
  28
  29 void read_trace_pipe(void);
  30 struct ksym {
  31         long addr;
  32         char *name;
  33 };
  34
  35 int load_kallsyms(void);
  36 struct ksym *ksym_search(long key);
  37 int set_link_xdp_fd(int ifindex, int fd);
  38 #endif