/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * ERSPAN Tunnel Metadata
 *
 * Copyright (c) 2018 VMware
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * Userspace API for metadata mode ERSPAN tunnel
 */
#ifndef _UAPI_ERSPAN_H
#define _UAPI_ERSPAN_H

#include <linux/types.h>        /* For __beXX in userspace */
#include <asm/byteorder.h>

/* ERSPAN version 2 metadata header */
struct erspan_md2 {
        __be32 timestamp;
        __be16 sgt;     /* security group tag */
#if defined(__LITTLE_ENDIAN_BITFIELD)
        __u8    hwid_upper:2,
                ft:5,
                p:1;
        __u8    o:1,
                gra:2,
                dir:1,
                hwid:4;
#elif defined(__BIG_ENDIAN_BITFIELD)
        __u8    p:1,
                ft:5,
                hwid_upper:2;
        __u8    hwid:4,
                dir:1,
                gra:2,
                o:1;
#else
#error "Please fix <asm/byteorder.h>"
#endif
};

struct erspan_metadata {
        int version;
        union {
                __be32 index;           /* Version 1 (type II)*/
                struct erspan_md2 md2;  /* Version 2 (type III) */
        } u;
};

#endif /* _UAPI_ERSPAN_H */