bpf_load.h 1.5 KB

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