summaryrefslogtreecommitdiff
path: root/include/uapi/linux/ioam6.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/uapi/linux/ioam6.h')
-rw-r--r--include/uapi/linux/ioam6.h133
1 files changed, 133 insertions, 0 deletions
diff --git a/include/uapi/linux/ioam6.h b/include/uapi/linux/ioam6.h
new file mode 100644
index 000000000000..ac4de376f0ce
--- /dev/null
+++ b/include/uapi/linux/ioam6.h
@@ -0,0 +1,133 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
+/*
+ * IPv6 IOAM implementation
+ *
+ * Author:
+ * Justin Iurman <justin.iurman@uliege.be>
+ */
+
+#ifndef _UAPI_LINUX_IOAM6_H
+#define _UAPI_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[0];
+} __attribute__((packed));
+
+#endif /* _UAPI_LINUX_IOAM6_H */