[RFC,net-next,v3,0/5] ice: L2TPv3 offload support

Message

Wojciech Drewek Sept. 1, 2022, 12:01 p.m. UTC

Add support for dissecting L2TPv3 session id in flow dissector. Add support
for this field in tc-flower and support offloading L2TPv3. Finally, add
support for hardware offload of L2TPv3 packets based on session id in
switchdev mode in ice driver.

Example filter:
  # tc filter add dev $PF1 ingress prio 1 protocol ip \
      flower \
        ip_proto l2tp \
        l2tpv3_sid 1234 \
        skip_sw \
      action mirred egress redirect dev $VF1_PR

Changes in iproute2 are required to use the new fields.

ICE COMMS DDP package is required to create a filter in ice.
COMMS DDP package contains profiles of more advanced protocols.
Without COMMS DDP package hw offload will not work, however
sw offload will still work.

v2: rebase
v3: refactor of __skb_flow_dissect_l2tpv3

Marcin Szycik (1):
  ice: Add L2TPv3 hardware offload support

Wojciech Drewek (4):
  uapi: move IPPROTO_L2TP to in.h
  flow_dissector: Add L2TPv3 dissectors
  net/sched: flower: Add L2TPv3 filter
  flow_offload: Introduce flow_match_l2tpv3

 .../ethernet/intel/ice/ice_protocol_type.h    |  8 +++
 drivers/net/ethernet/intel/ice/ice_switch.c   | 70 ++++++++++++++++++-
 drivers/net/ethernet/intel/ice/ice_tc_lib.c   | 27 ++++++-
 drivers/net/ethernet/intel/ice/ice_tc_lib.h   |  6 ++
 include/net/flow_dissector.h                  |  9 +++
 include/net/flow_offload.h                    |  6 ++
 include/uapi/linux/in.h                       |  2 +
 include/uapi/linux/l2tp.h                     |  2 -
 include/uapi/linux/pkt_cls.h                  |  2 +
 net/core/flow_dissector.c                     | 28 ++++++++
 net/core/flow_offload.c                       |  7 ++
 net/sched/cls_flower.c                        | 16 +++++
 12 files changed, 179 insertions(+), 4 deletions(-)