[RFC,net-next,v6,0/4] ice: PPPoE offload support

Message

Marcin Szycik July 18, 2022, 12:18 p.m. UTC

Add support for dissecting PPPoE and PPP-specific fields in flow dissector:
PPPoE session id and PPP protocol type. Add support for those fields in
tc-flower and support offloading PPPoE. Finally, add support for hardware
offload of PPPoE packets in switchdev mode in ice driver.

Example filter:
tc filter add dev $PF1 ingress protocol ppp_ses prio 1 flower pppoe_sid \
    1234 ppp_proto ip skip_sw action mirred egress redirect dev $VF1_PR

Changes in iproute2 are required to use the new fields (will be submitted
soon).

ICE COMMS DDP package is required to create a filter in ice.

v6:
  * make check for ppp proto more generic
  * fix remaining byte order issues
v5: fix endianness when processing compressed protocols
v4:
  * PPPoE header validation
  * added MPLS support
  * added support for compressed PPP protocol field
  * flow_dissector_key_pppoe::session_id stored in __be16
  * new field: flow_dissector_key_pppoe::type
  * always add an ethtype lookup if PPP/PPPoE options are provided (to
    prevent setting incorrect ethtype)
  * rebase
v3:
  * revert byte order changes in is_ppp_proto_supported from previous
    version
  * add kernel-doc for is_ppp_proto_supported
  * add more CC
v2: cosmetic changes

Marcin Szycik (1):
  ice: Add support for PPPoE hardware offload

Wojciech Drewek (3):
  flow_dissector: Add PPPoE dissectors
  net/sched: flower: Add PPPoE filter
  flow_offload: Introduce flow_match_pppoe

 drivers/net/ethernet/intel/ice/ice.h          |   1 +
 .../net/ethernet/intel/ice/ice_flex_pipe.c    |   5 +-
 .../ethernet/intel/ice/ice_protocol_type.h    |  11 ++
 drivers/net/ethernet/intel/ice/ice_switch.c   | 165 ++++++++++++++++++
 drivers/net/ethernet/intel/ice/ice_tc_lib.c   |  71 +++++++-
 drivers/net/ethernet/intel/ice/ice_tc_lib.h   |   8 +
 include/linux/ppp_defs.h                      |  14 ++
 include/net/flow_dissector.h                  |  13 ++
 include/net/flow_offload.h                    |   6 +
 include/uapi/linux/pkt_cls.h                  |   3 +
 net/core/flow_dissector.c                     |  53 +++++-
 net/core/flow_offload.c                       |   7 +
 net/sched/cls_flower.c                        |  64 +++++++
 13 files changed, 412 insertions(+), 9 deletions(-)