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net: erspan: introduce erspan v2 for ip_gre

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The patch adds support for erspan version 2.  Not all features are
supported in this patch.  The SGT (security group tag), GRA (timestamp
granularity), FT (frame type) are set to fixed value.  Only hardware
ID and direction are configurable.  Optional subheader is also not
supported.

Signed-off-by: William Tu <u9012063@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
William Tu 2017-12-13 16:38:56 -08:00 • committed by David S. Miller
parent 1d7e2ed22f
commit f551c91de2
5 changed files with 216 additions and 18 deletions
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1
include/uapi/linux/if_ether.h
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@ -47,6 +47,7 @@
#define ETH_P_PUP 0x0200 /* Xerox PUP packet */
#define ETH_P_PUPAT 0x0201 /* Xerox PUP Addr Trans packet */
#define ETH_P_TSN 0x22F0 /* TSN (IEEE 1722) packet */
#define ETH_P_ERSPAN2 0x22EB /* ERSPAN version 2 (type III) */
#define ETH_P_IP 0x0800 /* Internet Protocol packet */
#define ETH_P_X25 0x0805 /* CCITT X.25 */
#define ETH_P_ARP 0x0806 /* Address Resolution packet */