From fc00c656c96528112d05cf0edf8631bd5eaea446 Mon Sep 17 00:00:00 2001
From: Kacper <kacper@mail.openlinux.dev>
Date: Sun, 7 Dec 2025 20:10:31 +0100
Subject: Add build system scaffolding and libc headers

---
 include/arch/x86_64/linux/ioam6.h | 109 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100644 include/arch/x86_64/linux/ioam6.h

(limited to 'include/arch/x86_64/linux/ioam6.h')

diff --git a/include/arch/x86_64/linux/ioam6.h b/include/arch/x86_64/linux/ioam6.h
new file mode 100644
index 00000000..80f23d2d
--- /dev/null
+++ b/include/arch/x86_64/linux/ioam6.h
@@ -0,0 +1,109 @@
+/* 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 */
-- 
cgit v1.2.3