1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _XT_BPF_H
3 #define _XT_BPF_H
4 
5 #include <linux/filter.h>
6 #include <linux/limits.h>
7 #include <linux/types.h>
8 
9 #define XT_BPF_MAX_NUM_INSTR	64
10 #define XT_BPF_PATH_MAX		(XT_BPF_MAX_NUM_INSTR * sizeof(struct sock_filter))
11 
12 struct bpf_prog;
13 
14 struct xt_bpf_info {
15 	__u16 bpf_program_num_elem;
16 	struct sock_filter bpf_program[XT_BPF_MAX_NUM_INSTR];
17 
18 	/* only used in the kernel */
19 	struct bpf_prog *filter __attribute__((aligned(8)));
20 };
21 
22 enum xt_bpf_modes {
23 	XT_BPF_MODE_BYTECODE,
24 	XT_BPF_MODE_FD_PINNED,
25 	XT_BPF_MODE_FD_ELF,
26 };
27 #define XT_BPF_MODE_PATH_PINNED XT_BPF_MODE_FD_PINNED
28 
29 struct xt_bpf_info_v1 {
30 	__u16 mode;
31 	__u16 bpf_program_num_elem;
32 	__s32 fd;
33 	union {
34 		struct sock_filter bpf_program[XT_BPF_MAX_NUM_INSTR];
35 		char path[XT_BPF_PATH_MAX];
36 	};
37 
38 	/* only used in the kernel */
39 	struct bpf_prog *filter __attribute__((aligned(8)));
40 };
41 
42 #endif /*_XT_BPF_H */
43