mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 07:26:26 +07:00
62 lines
2.1 KiB
C
62 lines
2.1 KiB
C
|
#ifndef __LINUX_ERSPAN_H
|
||
|
#define __LINUX_ERSPAN_H
|
||
|
|
||
|
/*
|
||
|
* GRE header for ERSPAN encapsulation (8 octets [34:41]) -- 8 bytes
|
||
|
* 0 1 2 3
|
||
|
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||
|
* |0|0|0|1|0|00000|000000000|00000| Protocol Type for ERSPAN |
|
||
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||
|
* | Sequence Number (increments per packet per session) |
|
||
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||
|
*
|
||
|
* Note that in the above GRE header [RFC1701] out of the C, R, K, S,
|
||
|
* s, Recur, Flags, Version fields only S (bit 03) is set to 1. The
|
||
|
* other fields are set to zero, so only a sequence number follows.
|
||
|
*
|
||
|
* ERSPAN Type II header (8 octets [42:49])
|
||
|
* 0 1 2 3
|
||
|
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||
|
* | Ver | VLAN | COS | En|T| Session ID |
|
||
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||
|
* | Reserved | Index |
|
||
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||
|
*
|
||
|
* GRE proto ERSPAN type II = 0x88BE, type III = 0x22EB
|
||
|
*/
|
||
|
|
||
|
#define ERSPAN_VERSION 0x1
|
||
|
|
||
|
#define VER_MASK 0xf000
|
||
|
#define VLAN_MASK 0x0fff
|
||
|
#define COS_MASK 0xe000
|
||
|
#define EN_MASK 0x1800
|
||
|
#define T_MASK 0x0400
|
||
|
#define ID_MASK 0x03ff
|
||
|
#define INDEX_MASK 0xfffff
|
||
|
|
||
|
enum erspan_encap_type {
|
||
|
ERSPAN_ENCAP_NOVLAN = 0x0, /* originally without VLAN tag */
|
||
|
ERSPAN_ENCAP_ISL = 0x1, /* originally ISL encapsulated */
|
||
|
ERSPAN_ENCAP_8021Q = 0x2, /* originally 802.1Q encapsulated */
|
||
|
ERSPAN_ENCAP_INFRAME = 0x3, /* VLAN tag perserved in frame */
|
||
|
};
|
||
|
|
||
|
struct erspan_metadata {
|
||
|
__be32 index; /* type II */
|
||
|
};
|
||
|
|
||
|
struct erspanhdr {
|
||
|
__be16 ver_vlan;
|
||
|
#define VER_OFFSET 12
|
||
|
__be16 session_id;
|
||
|
#define COS_OFFSET 13
|
||
|
#define EN_OFFSET 11
|
||
|
#define T_OFFSET 10
|
||
|
struct erspan_metadata md;
|
||
|
};
|
||
|
|
||
|
#endif
|