LXR iproute2/include/uapi/linux/ioam6.h

   1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
   2/*
   3 *  IPv6 IOAM implementation
   4 *
   5 *  Author:
   6 *  Justin Iurman <justin.iurman@uliege.be>
   7 */
   8
   9#ifndef _LINUX_IOAM6_H
  10#define _LINUX_IOAM6_H
  11
  12#include <asm/byteorder.h>
  13#include <linux/types.h>
  14
  15#define IOAM6_U16_UNAVAILABLE U16_MAX
  16#define IOAM6_U32_UNAVAILABLE U32_MAX
  17#define IOAM6_U64_UNAVAILABLE U64_MAX
  18
  19#define IOAM6_DEFAULT_ID (IOAM6_U32_UNAVAILABLE >> 8)
  20#define IOAM6_DEFAULT_ID_WIDE (IOAM6_U64_UNAVAILABLE >> 8)
  21#define IOAM6_DEFAULT_IF_ID IOAM6_U16_UNAVAILABLE
  22#define IOAM6_DEFAULT_IF_ID_WIDE IOAM6_U32_UNAVAILABLE
  23
  24/*
  25 * IPv6 IOAM Option Header
  26 */
  27struct ioam6_hdr {
  28        __u8 opt_type;
  29        __u8 opt_len;
  30        __u8 :8;                                /* reserved */
  31#define IOAM6_TYPE_PREALLOC 0
  32        __u8 type;
  33} __attribute__((packed));
  34
  35/*
  36 * IOAM Trace Header
  37 */
  38struct ioam6_trace_hdr {
  39        __be16  namespace_id;
  40
  41#if defined(__LITTLE_ENDIAN_BITFIELD)
  42
  43        __u8    :1,                             /* unused */
  44                :1,                             /* unused */
  45                overflow:1,
  46                nodelen:5;
  47
  48        __u8    remlen:7,
  49                :1;                             /* unused */
  50
  51        union {
  52                __be32 type_be32;
  53
  54                struct {
  55                        __u32   bit7:1,
  56                                bit6:1,
  57                                bit5:1,
  58                                bit4:1,
  59                                bit3:1,
  60                                bit2:1,
  61                                bit1:1,
  62                                bit0:1,
  63                                bit15:1,        /* unused */
  64                                bit14:1,        /* unused */
  65                                bit13:1,        /* unused */
  66                                bit12:1,        /* unused */
  67                                bit11:1,
  68                                bit10:1,
  69                                bit9:1,
  70                                bit8:1,
  71                                bit23:1,        /* reserved */
  72                                bit22:1,
  73                                bit21:1,        /* unused */
  74                                bit20:1,        /* unused */
  75                                bit19:1,        /* unused */
  76                                bit18:1,        /* unused */
  77                                bit17:1,        /* unused */
  78                                bit16:1,        /* unused */
  79                                :8;             /* reserved */
  80                } type;
  81        };
  82
  83#elif defined(__BIG_ENDIAN_BITFIELD)
  84
  85        __u8    nodelen:5,
  86                overflow:1,
  87                :1,                             /* unused */
  88                :1;                             /* unused */
  89
  90        __u8    :1,                             /* unused */
  91                remlen:7;
  92
  93        union {
  94                __be32 type_be32;
  95
  96                struct {
  97                        __u32   bit0:1,
  98                                bit1:1,
  99                                bit2:1,
 100                                bit3:1,
 101                                bit4:1,
 102                                bit5:1,
 103                                bit6:1,
 104                                bit7:1,
 105                                bit8:1,
 106                                bit9:1,
 107                                bit10:1,
 108                                bit11:1,
 109                                bit12:1,        /* unused */
 110                                bit13:1,        /* unused */
 111                                bit14:1,        /* unused */
 112                                bit15:1,        /* unused */
 113                                bit16:1,        /* unused */
 114                                bit17:1,        /* unused */
 115                                bit18:1,        /* unused */
 116                                bit19:1,        /* unused */
 117                                bit20:1,        /* unused */
 118                                bit21:1,        /* unused */
 119                                bit22:1,
 120                                bit23:1,        /* reserved */
 121                                :8;             /* reserved */
 122                } type;
 123        };
 124
 125#else
 126#error "Please fix <asm/byteorder.h>"
 127#endif
 128
 129#define IOAM6_TRACE_DATA_SIZE_MAX 244
 130        __u8    data[0];
 131} __attribute__((packed));
 132
 133#endif /* _LINUX_IOAM6_H */
 134