/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _XT_BPF_H
#define _XT_BPF_H

#include <linux/filter.h>
#include <linux/limits.h>
#include <linux/types.h>

#define XT_BPF_MAX_NUM_INSTR    64
#define XT_BPF_PATH_MAX         (XT_BPF_MAX_NUM_INSTR * sizeof(struct sock_filter))

struct bpf_prog;

struct xt_bpf_info {
        __u16 bpf_program_num_elem;
        struct sock_filter bpf_program[XT_BPF_MAX_NUM_INSTR];

        /* only used in the kernel */
        struct bpf_prog *filter __attribute__((aligned(8)));
};

enum xt_bpf_modes {
        XT_BPF_MODE_BYTECODE,
        XT_BPF_MODE_FD_PINNED,
        XT_BPF_MODE_FD_ELF,
};
#define XT_BPF_MODE_PATH_PINNED XT_BPF_MODE_FD_PINNED

struct xt_bpf_info_v1 {
        __u16 mode;
        __u16 bpf_program_num_elem;
        __s32 fd;
        union {
                struct sock_filter bpf_program[XT_BPF_MAX_NUM_INSTR];
                char path[XT_BPF_PATH_MAX];
        };

        /* only used in the kernel */
        struct bpf_prog *filter __attribute__((aligned(8)));
};

#endif /*_XT_BPF_H */