1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __BPF_LOAD_H 3 #define __BPF_LOAD_H 4 5 #include <bpf/bpf.h> 6 7 #define MAX_MAPS 32 8 #define MAX_PROGS 32 9 10 struct bpf_load_map_def { 11 unsigned int type; 12 unsigned int key_size; 13 unsigned int value_size; 14 unsigned int max_entries; 15 unsigned int map_flags; 16 unsigned int inner_map_idx; 17 unsigned int numa_node; 18 }; 19 20 struct bpf_map_data { 21 int fd; 22 char *name; 23 size_t elf_offset; 24 struct bpf_load_map_def def; 25 }; 26 27 typedef void (*fixup_map_cb)(struct bpf_map_data *map, int idx); 28 29 extern int prog_fd[MAX_PROGS]; 30 extern int event_fd[MAX_PROGS]; 31 extern char bpf_log_buf[BPF_LOG_BUF_SIZE]; 32 extern int prog_cnt; 33 34 /* There is a one-to-one mapping between map_fd[] and map_data[]. 35 * The map_data[] just contains more rich info on the given map. 36 */ 37 extern int map_fd[MAX_MAPS]; 38 extern struct bpf_map_data map_data[MAX_MAPS]; 39 extern int map_data_count; 40 41 /* parses elf file compiled by llvm .c->.o 42 * . parses 'maps' section and creates maps via BPF syscall 43 * . parses 'license' section and passes it to syscall 44 * . parses elf relocations for BPF maps and adjusts BPF_LD_IMM64 insns by 45 * storing map_fd into insn->imm and marking such insns as BPF_PSEUDO_MAP_FD 46 * . loads eBPF programs via BPF syscall 47 * 48 * One ELF file can contain multiple BPF programs which will be loaded 49 * and their FDs stored stored in prog_fd array 50 * 51 * returns zero on success 52 */ 53 int load_bpf_file(char *path); 54 int load_bpf_file_fixup_map(const char *path, fixup_map_cb fixup_map); 55 56 void read_trace_pipe(void); 57 int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags); 58 #endif 59
