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gre: Setup and TX path for gre/UDP foo-over-udp encapsulation

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Added netlink attrs to configure FOU encapsulation for GRE, netlink
handling of these flags, and properly adjust MTU for encapsulation.
ip_tunnel_encap is called from ip_tunnel_xmit to actually perform FOU
encapsulation.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert
2014-09-17 12:26:01 -07:00
committed by David S. Miller
parent 473ab820dd
commit 4565e9919c
2 changed files with 89 additions and 5 deletions
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4
include/uapi/linux/if_tunnel.h
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@@ -106,6 +106,10 @@ enum {
IFLA_GRE_ENCAP_LIMIT,
IFLA_GRE_FLOWINFO,
IFLA_GRE_FLAGS,
IFLA_GRE_ENCAP_TYPE,
IFLA_GRE_ENCAP_FLAGS,
IFLA_GRE_ENCAP_SPORT,
IFLA_GRE_ENCAP_DPORT,
__IFLA_GRE_MAX,
};