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/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/*
* IPv6 IOAM implementation
*
* Author:
* Justin Iurman <justin.iurman@uliege.be>
*/
#ifndef _LINUX_IOAM6_H
#define _LINUX_IOAM6_H
#include <asm/byteorder.h>
#include <linux/types.h>
#define IOAM6_U16_UNAVAILABLE U16_MAX
#define IOAM6_U32_UNAVAILABLE U32_MAX
#define IOAM6_U64_UNAVAILABLE U64_MAX
#define IOAM6_DEFAULT_ID (IOAM6_U32_UNAVAILABLE >> 8)
#define IOAM6_DEFAULT_ID_WIDE (IOAM6_U64_UNAVAILABLE >> 8)
#define IOAM6_DEFAULT_IF_ID IOAM6_U16_UNAVAILABLE
#define IOAM6_DEFAULT_IF_ID_WIDE IOAM6_U32_UNAVAILABLE
/*
* IPv6 IOAM Option Header
*/
struct ioam6_hdr {
__u8 opt_type;
__u8 opt_len;
__u8 :8; /* reserved */
#define IOAM6_TYPE_PREALLOC 0
__u8 type;
} __attribute__((packed));
/*
* IOAM Trace Header
*/
struct ioam6_trace_hdr {
__be16 namespace_id;
#if defined(__LITTLE_ENDIAN_BITFIELD)
__u8 :1, /* unused */
:1, /* unused */
overflow:1,
nodelen:5;
__u8 remlen:7,
:1; /* unused */
union {
__be32 type_be32;
struct {
__u32 bit7:1,
bit6:1,
bit5:1,
bit4:1,
bit3:1,
bit2:1,
bit1:1,
bit0:1,
bit15:1, /* unused */
bit14:1, /* unused */
bit13:1, /* unused */
bit12:1, /* unused */
bit11:1,
bit10:1,
bit9:1,
bit8:1,
bit23:1, /* reserved */
bit22:1,
bit21:1, /* unused */
bit20:1, /* unused */
bit19:1, /* unused */
bit18:1, /* unused */
bit17:1, /* unused */
bit16:1, /* unused */
:8; /* reserved */
} type;
};
#elif defined(__BIG_ENDIAN_BITFIELD)
__u8 nodelen:5,
overflow:1,
:1, /* unused */
:1; /* unused */
__u8 :1, /* unused */
remlen:7;
union {
__be32 type_be32;
struct {
__u32 bit0:1,
bit1:1,
bit2:1,
bit3:1,
bit4:1,
bit5:1,
bit6:1,
bit7:1,
bit8:1,
bit9:1,
bit10:1,
bit11:1,
bit12:1, /* unused */
bit13:1, /* unused */
bit14:1, /* unused */
bit15:1, /* unused */
bit16:1, /* unused */
bit17:1, /* unused */
bit18:1, /* unused */
bit19:1, /* unused */
bit20:1, /* unused */
bit21:1, /* unused */
bit22:1,
bit23:1, /* reserved */
:8; /* reserved */
} type;
};
#else
#error "Please fix <asm/byteorder.h>"
#endif
#define IOAM6_TRACE_DATA_SIZE_MAX 244
__u8 data[];
} __attribute__((packed));
#endif /* _LINUX_IOAM6_H */
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