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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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