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 | |