Where Online Learning is simpler!

The C and C++ Include Header Files

/usr/include/linux/netfilter/xt_bpf.h


$ cat -n /usr/include/linux/netfilter/xt_bpf.h

     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 */