nsh: headers, GSO

This adds header structs and helpers for NSH together with GSO support.

Note there is no code in this patchset that actually manipulates the NSH headers. That was sent to netdev by Yi Yang ("[PATCH net-next v6 0/3]
openvswitch: add NSH support"). The aim of this series is to lay the groundwork and ease the implementation for him.

In addition to openvswitch, the NSH support should be added to tc (flower to match, act_nsh to push/pop NSH headers). That will come later. There's currently no plan to support NSH by other means than those two.

The patch 3 in this patchset was written by Yi Yang, I took it from the aforementioned series and slightly modified it - see the note in the patch.

Jiri Benc (3):
ether: add NSH ethertype
vxlan: factor out VXLAN-GPE next protocol
nsh: add GSO support

Yi Yang (1):
net: add NSH header structures and helpers

 drivers/net/vxlan.c           |  32 +----
 include/net/nsh.h             | 307 ++++++++++++++++++++++++++++++++++++++++++
 include/net/tun_proto.h       |  49 +++++++
 include/net/vxlan.h           |   6 -
 include/uapi/linux/if_ether.h |   1 +
 net/Kconfig                   |   1 +
 net/Makefile                  |   1 +
 net/nsh/Kconfig               |   9 ++
 net/nsh/Makefile              |   1 +
 net/nsh/nsh.c                 |  91 +++++++++++++
 10 files changed, 467 insertions(+), 31 deletions(-)
 create mode 100644 include/net/nsh.h
 create mode 100644 include/net/tun_proto.h
 create mode 100644 net/nsh/Kconfig
 create mode 100644 net/nsh/Makefile
 create mode 100644 net/nsh/nsh.c

1.8.3.1