include/uapi/linux/erspan.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 /*
   3  * ERSPAN Tunnel Metadata
   4  *
   5  * Copyright (c) 2018 VMware
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2
   9  * as published by the Free Software Foundation.
  10  *
  11  * Userspace API for metadata mode ERSPAN tunnel
  12  */
  13 #ifndef _UAPI_ERSPAN_H
  14 #define _UAPI_ERSPAN_H
  15
  16 #include <linux/types.h>        /* For __beXX in userspace */
  17 #include <asm/byteorder.h>
  18
  19 /* ERSPAN version 2 metadata header */
  20 struct erspan_md2 {
  21         __be32 timestamp;
  22         __be16 sgt;     /* security group tag */
  23 #if defined(__LITTLE_ENDIAN_BITFIELD)
  24         __u8    hwid_upper:2,
  25                 ft:5,
  26                 p:1;
  27         __u8    o:1,
  28                 gra:2,
  29                 dir:1,
  30                 hwid:4;
  31 #elif defined(__BIG_ENDIAN_BITFIELD)
  32         __u8    p:1,
  33                 ft:5,
  34                 hwid_upper:2;
  35         __u8    hwid:4,
  36                 dir:1,
  37                 gra:2,
  38                 o:1;
  39 #else
  40 #error "Please fix <asm/byteorder.h>"
  41 #endif
  42 };
  43
  44 struct erspan_metadata {
  45         int version;
  46         union {
  47                 __be32 index;           /* Version 1 (type II)*/
  48                 struct erspan_md2 md2;  /* Version 2 (type III) */
  49         } u;
  50 };
  51
  52 #endif /* _UAPI_ERSPAN_H */