RFC Convert OVS tunnel vports to use regular net_devices

This is the first series in a greater effort to bring the scalability and programmability advantages of OVS to the rest of the network stack and to get rid of as much OVS specific code as possible.

This first series focuses on getting rid of OVS tunnel vports and use regular tunnel net_devices instead. As part of this effort, the routing subsystem is extended with support for flow based tunneling. In this new tunneling mode, the route is able to match on tunnel information as well as set tunnel encapsulation parameters per route. This allows to perform L3 forwarding for a large number of tunnel endpoints and virtual networks using a single tunnel net_device.

TODO:
- Geneve support
- IPv6 support
- Benchmarks

Pravin Shelar (1):
openvswitch: Use regular GRE net_device instead of vport

Thomas Graf (13):
ip_tunnel: Make ovs_tunnel_info and ovs_key_ipv4_tunnel generic
ip_tunnel: support per packet tunnel metadata
vxlan: Flow based tunneling
route: Extend flow representation with tunnel key
route: Per route tunnel metadata with RTA_TUNNEL
fib: Add fib rule match on tunnel id
vxlan: Factor out device configuration
openvswitch: Allocate & attach ip_tunnel_info for tunnel set action
openvswitch: Move dev pointer into vport itself
openvswitch: Abstract vport name through ovs_vport_name()
openvswitch: Use regular VXLAN net_device device
vxlan: remove indirect call to vxlan_rcv() and vni member
arp: Associate ARP requests with tunnel info

 drivers/net/vxlan.c                  | 663 ++++++++++++++++++++---------------
 include/linux/skbuff.h               |   2 +
 include/net/fib_rules.h              |   1 +
 include/net/flow.h                   |   7 +
 include/net/ip_fib.h                 |   3 +
 include/net/ip_tunnels.h             | 127 ++++++-
 include/net/route.h                  |  18 +
 include/net/vxlan.h                  |  82 ++++-
 include/uapi/linux/fib_rules.h       |   2 +-
 include/uapi/linux/if_link.h         |   1 +
 include/uapi/linux/openvswitch.h     |   2 +-
 include/uapi/linux/rtnetlink.h       |  16 +
 net/core/dev.c                       |   5 +-
 net/core/fib_rules.c                 |  17 +-
 net/core/skbuff.c                    |   8 +
 net/ipv4/arp.c                       |   8 +
 net/ipv4/fib_frontend.c              |  57 +++
 net/ipv4/fib_semantics.c             |  45 +++
 net/ipv4/ip_gre.c                    | 161 ++++++++-
 net/ipv4/ip_tunnel_core.c            |  15 +
 net/ipv4/route.c                     |  32 +-
 net/openvswitch/Kconfig              |  12 -
 net/openvswitch/Makefile             |   2 -
 net/openvswitch/actions.c            |  10 +-
 net/openvswitch/datapath.c           |  19 +-
 net/openvswitch/datapath.h           |   5 +-
 net/openvswitch/dp_notify.c          |   5 +-
 net/openvswitch/flow.c               |   4 +-
 net/openvswitch/flow.h               |  77 +---
 net/openvswitch/flow_netlink.c       |  78 ++++-
 net/openvswitch/flow_netlink.h       |   3 +-
 net/openvswitch/vport-geneve.c       |  17 +-
 net/openvswitch/vport-gre.c          | 313 -----------------
 net/openvswitch/vport-internal_dev.c |  38 +-
 net/openvswitch/vport-netdev.c       | 271 +++++++++++---
 net/openvswitch/vport-netdev.h       |  13 -
 net/openvswitch/vport-vxlan.c        | 322 -----------------
 net/openvswitch/vport.c              |  34 +-
 net/openvswitch/vport.h              |  21 +-
 39 files changed, 1334 insertions(+), 1182 deletions(-)
 delete mode 100644 net/openvswitch/vport-gre.c
 delete mode 100644 net/openvswitch/vport-vxlan.c

2.3.5