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| 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
|---|---|
| 2 | /* |
| 3 | * ERSPAN Tunnel Metadata |
| 4 | * |
| 5 | * Copyright (c) 2018 VMware |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 |
| 9 | * as published by the Free Software Foundation. |
| 10 | * |
| 11 | * Userspace API for metadata mode ERSPAN tunnel |
| 12 | */ |
| 13 | #ifndef _UAPI_ERSPAN_H |
| 14 | #define _UAPI_ERSPAN_H |
| 15 | |
| 16 | #include <linux/types.h> /* For __beXX in userspace */ |
| 17 | #include <asm/byteorder.h> |
| 18 | |
| 19 | /* ERSPAN version 2 metadata header */ |
| 20 | struct erspan_md2 { |
| 21 | __be32 timestamp; |
| 22 | __be16 sgt; /* security group tag */ |
| 23 | #if defined(__LITTLE_ENDIAN_BITFIELD) |
| 24 | __u8 hwid_upper:2, |
| 25 | ft:5, |
| 26 | p:1; |
| 27 | __u8 o:1, |
| 28 | gra:2, |
| 29 | dir:1, |
| 30 | hwid:4; |
| 31 | #elif defined(__BIG_ENDIAN_BITFIELD) |
| 32 | __u8 p:1, |
| 33 | ft:5, |
| 34 | hwid_upper:2; |
| 35 | __u8 hwid:4, |
| 36 | dir:1, |
| 37 | gra:2, |
| 38 | o:1; |
| 39 | #else |
| 40 | #error "Please fix <asm/byteorder.h>" |
| 41 | #endif |
| 42 | }; |
| 43 | |
| 44 | struct erspan_metadata { |
| 45 | int version; |
| 46 | union { |
| 47 | __be32 index; /* Version 1 (type II)*/ |
| 48 | struct erspan_md2 md2; /* Version 2 (type III) */ |
| 49 | } u; |
| 50 | }; |
| 51 | |
| 52 | #endif /* _UAPI_ERSPAN_H */ |
| 53 |
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