Linux 4.16.11
[linux/fpc-iii.git] / samples / bpf / bpf_load.h
blob453c200b389bf630c25428ef0a03647d75d8f35b
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __BPF_LOAD_H
3 #define __BPF_LOAD_H
5 #include "libbpf.h"
7 #define MAX_MAPS 32
8 #define MAX_PROGS 32
10 struct bpf_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;
20 struct bpf_map_data {
21 int fd;
22 char *name;
23 size_t elf_offset;
24 struct bpf_map_def def;
27 typedef void (*fixup_map_cb)(struct bpf_map_data *map, int idx);
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;
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.
37 extern int map_fd[MAX_MAPS];
38 extern struct bpf_map_data map_data[MAX_MAPS];
39 extern int map_data_count;
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
48 * One ELF file can contain multiple BPF programs which will be loaded
49 * and their FDs stored stored in prog_fd array
51 * returns zero on success
53 int load_bpf_file(char *path);
54 int load_bpf_file_fixup_map(const char *path, fixup_map_cb fixup_map);
56 void read_trace_pipe(void);
57 struct ksym {
58 long addr;
59 char *name;
62 int load_kallsyms(void);
63 struct ksym *ksym_search(long key);
64 int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags);
65 #endif