18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 28c2ecf20Sopenharmony_ci#ifndef __BPF_LOAD_H 38c2ecf20Sopenharmony_ci#define __BPF_LOAD_H 48c2ecf20Sopenharmony_ci 58c2ecf20Sopenharmony_ci#include <bpf/bpf.h> 68c2ecf20Sopenharmony_ci 78c2ecf20Sopenharmony_ci#define MAX_MAPS 32 88c2ecf20Sopenharmony_ci#define MAX_PROGS 32 98c2ecf20Sopenharmony_ci 108c2ecf20Sopenharmony_cistruct bpf_load_map_def { 118c2ecf20Sopenharmony_ci unsigned int type; 128c2ecf20Sopenharmony_ci unsigned int key_size; 138c2ecf20Sopenharmony_ci unsigned int value_size; 148c2ecf20Sopenharmony_ci unsigned int max_entries; 158c2ecf20Sopenharmony_ci unsigned int map_flags; 168c2ecf20Sopenharmony_ci unsigned int inner_map_idx; 178c2ecf20Sopenharmony_ci unsigned int numa_node; 188c2ecf20Sopenharmony_ci}; 198c2ecf20Sopenharmony_ci 208c2ecf20Sopenharmony_cistruct bpf_map_data { 218c2ecf20Sopenharmony_ci int fd; 228c2ecf20Sopenharmony_ci char *name; 238c2ecf20Sopenharmony_ci size_t elf_offset; 248c2ecf20Sopenharmony_ci struct bpf_load_map_def def; 258c2ecf20Sopenharmony_ci}; 268c2ecf20Sopenharmony_ci 278c2ecf20Sopenharmony_citypedef void (*fixup_map_cb)(struct bpf_map_data *map, int idx); 288c2ecf20Sopenharmony_ci 298c2ecf20Sopenharmony_ciextern int prog_fd[MAX_PROGS]; 308c2ecf20Sopenharmony_ciextern int event_fd[MAX_PROGS]; 318c2ecf20Sopenharmony_ciextern char bpf_log_buf[BPF_LOG_BUF_SIZE]; 328c2ecf20Sopenharmony_ciextern int prog_cnt; 338c2ecf20Sopenharmony_ci 348c2ecf20Sopenharmony_ci/* There is a one-to-one mapping between map_fd[] and map_data[]. 358c2ecf20Sopenharmony_ci * The map_data[] just contains more rich info on the given map. 368c2ecf20Sopenharmony_ci */ 378c2ecf20Sopenharmony_ciextern int map_fd[MAX_MAPS]; 388c2ecf20Sopenharmony_ciextern struct bpf_map_data map_data[MAX_MAPS]; 398c2ecf20Sopenharmony_ciextern int map_data_count; 408c2ecf20Sopenharmony_ci 418c2ecf20Sopenharmony_ci/* parses elf file compiled by llvm .c->.o 428c2ecf20Sopenharmony_ci * . parses 'maps' section and creates maps via BPF syscall 438c2ecf20Sopenharmony_ci * . parses 'license' section and passes it to syscall 448c2ecf20Sopenharmony_ci * . parses elf relocations for BPF maps and adjusts BPF_LD_IMM64 insns by 458c2ecf20Sopenharmony_ci * storing map_fd into insn->imm and marking such insns as BPF_PSEUDO_MAP_FD 468c2ecf20Sopenharmony_ci * . loads eBPF programs via BPF syscall 478c2ecf20Sopenharmony_ci * 488c2ecf20Sopenharmony_ci * One ELF file can contain multiple BPF programs which will be loaded 498c2ecf20Sopenharmony_ci * and their FDs stored stored in prog_fd array 508c2ecf20Sopenharmony_ci * 518c2ecf20Sopenharmony_ci * returns zero on success 528c2ecf20Sopenharmony_ci */ 538c2ecf20Sopenharmony_ciint load_bpf_file(char *path); 548c2ecf20Sopenharmony_ciint load_bpf_file_fixup_map(const char *path, fixup_map_cb fixup_map); 558c2ecf20Sopenharmony_ci 568c2ecf20Sopenharmony_ciint bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags); 578c2ecf20Sopenharmony_ci#endif 58