[PATCH iproute2 V4 0/3] tc: Support for ip tunnel metadata set/unset/classify

[Amir Vadai <amir@vadai.me>]

Hi,

This short series adds support for matching and setting metadata for ip tunnel
shared device using the TC system, introduced in kernel 4.9 [1].

Applied and tested on top of commit f3f339e9590a ("cleanup debris from revert")

Example usage:

$ tc filter add dev vxlan0 protocol ip parent ffff: \
    flower \
      enc_src_ip 11.11.0.2 \
      enc_dst_ip 11.11.0.1 \
      enc_key_id 11 \
      dst_ip 11.11.11.1 \
    action mirred egress redirect dev vnet0

$ tc filter add dev net0 protocol ip parent ffff: \
    flower \
      ip_proto 1 \
      dst_ip 11.11.11.2 \
    action tunnel_key set \
      src_ip 11.11.0.1 \
      dst_ip 11.11.0.2 \
      id 11 \
    action mirred egress redirect dev vxlan0

[1] - d1ba24feb466 ("Merge branch 'act_tunnel_key'")

Thanks,
Amir

Changes from V3:
- Fix bad wording in the man page about the use of the 'unset' operation

Changes from V2:
- Use const where needed
- Don't lose return value
- Introduce rta_getattr_be16() and rta_getattr_be32()

Changes from V1:
- Updated Patch 2/2 ("tc/act_tunnel: Introduce ip tunnel action") commit log
	and the man page tc-tunnel_key to reflect the fact that 'unset' operation is
	no mandatory.
	And describe when it might be needed.
- Rename the 'release' operation to 'unset'

Amir Vadai (3):
  libnetlink: Introduce rta_getattr_be*()
  tc/cls_flower: Classify packet in ip tunnels
  tc/act_tunnel: Introduce ip tunnel action

 bridge/fdb.c                         |   4 +-
 include/libnetlink.h                 |   9 ++
 include/linux/tc_act/tc_tunnel_key.h |  42 ++++++
 ip/iplink_geneve.c                   |   2 +-
 ip/iplink_vxlan.c                    |   2 +-
 man/man8/tc-flower.8                 |  17 ++-
 man/man8/tc-tunnel_key.8             | 112 +++++++++++++++
 tc/Makefile                          |   1 +
 tc/f_flower.c                        |  84 +++++++++++-
 tc/m_tunnel_key.c                    | 258 +++++++++++++++++++++++++++++++++++
 10 files changed, 522 insertions(+), 9 deletions(-)
 create mode 100644 include/linux/tc_act/tc_tunnel_key.h
 create mode 100644 man/man8/tc-tunnel_key.8
 create mode 100644 tc/m_tunnel_key.c

-- 
2.10.2