[PATCH net-next,v3 00/12] add flow_rule infrastructure

[Pablo Neira Ayuso <pablo@netfilter.org>]

Hi,

This patchset is the third iteration [1] [2] [3] to introduce a kernel
intermediate (IR) to express ACL hardware offloads.

This round addresses feedback from Jiri Pirko:

* Add net/core/flow_offload.c and include/net/flow_offload.h.
* Add flow_rule_alloc() helper function.
* Remove _key postfix and _KEY_ infix in flow_action definitions.
* Use enum flow_action_mangle_base for consistency.
* Rename key field to entries and num_keys to num_entries.
* Rename struct flow_action_key to flow_action_entry.
* Use placeholder in struct flow_action to store array of actions
  from flow_rule_alloc().
* Add tcf_exts_num_actions() and pass it to flow_rule_alloc() to
  calculate the size of the array of actions.
* Rename to struct flow_stats and to function flow_stats_update().
* Add struct ethtool_rx_flow_rule, keep placeholder to private
  dissector information.
* Pass struct flow_rule *rule to all parser functions in qlogic/qede
  driver.

This also fixes a bug reported by Manish Chopra, in the ethtool_rx_spec
to flow_rule translator.

Making all these changes have been an exercise to review the existing
infrastructure, to understand what has been done and to propose
improvements to the _great work_ that core drivers developers have done
so far to introduce HW offloads through the existing frontend APIs.  I
still have more feedback and technical ideas that I'm very much looking
forward to discuss with them in the future.

Main goal of this patchset is to avoid code duplication for driver
developers. There are no netfilter changes coming in this batch.
I would like to explore Netfilter hardware offloads in the future.

Thanks a lot for reviewing!

[1] https://lwn.net/Articles/766695/
[2] https://marc.info/?l=linux-netdev&m=154233253114506&w=2
[3] https://marc.info/?l=linux-netdev&m=154258780717036&w=2

Pablo Neira Ayuso (12):
  flow_dissector: add flow_rule and flow_match structures and use them
  net/mlx5e: support for two independent packet edit actions
  flow_dissector: add flow action infrastructure
  cls_api: add translator to flow_action representation
  cls_flower: add statistics retrieval infrastructure and use it
  drivers: net: use flow action infrastructure
  cls_flower: don't expose TC actions to drivers anymore
  flow_dissector: add wake-up-on-lan and queue to flow_action
  flow_dissector: add basic ethtool_rx_flow_spec to flow_rule structure translator
  dsa: bcm_sf2: use flow_rule infrastructure
  qede: place ethtool_rx_flow_spec after code after TC flower codebase
  qede: use ethtool_rx_flow_rule() to remove duplicated parser code

 drivers/net/dsa/bcm_sf2_cfp.c                      | 109 +--
 drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c       | 252 +++----
 .../net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c   | 450 ++++++-------
 drivers/net/ethernet/intel/i40e/i40e_main.c        | 178 ++---
 drivers/net/ethernet/intel/iavf/iavf_main.c        | 195 +++---
 drivers/net/ethernet/intel/igb/igb_main.c          |  64 +-
 drivers/net/ethernet/mellanox/mlx5/core/en_tc.c    | 743 ++++++++++-----------
 drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c |   2 +-
 .../net/ethernet/mellanox/mlxsw/spectrum_flower.c  | 258 ++++---
 drivers/net/ethernet/netronome/nfp/flower/action.c | 196 +++---
 drivers/net/ethernet/netronome/nfp/flower/match.c  | 417 ++++++------
 .../net/ethernet/netronome/nfp/flower/offload.c    | 150 ++---
 drivers/net/ethernet/qlogic/qede/qede_filter.c     | 560 ++++++----------
 include/linux/ethtool.h                            |  10 +
 include/net/flow_offload.h                         | 199 ++++++
 include/net/pkt_cls.h                              |  18 +-
 net/core/Makefile                                  |   2 +-
 net/core/ethtool.c                                 | 189 ++++++
 net/core/flow_offload.c                            | 153 +++++
 net/sched/cls_api.c                                | 116 ++++
 net/sched/cls_flower.c                             |  69 +-
 21 files changed, 2339 insertions(+), 1991 deletions(-)
 create mode 100644 include/net/flow_offload.h
 create mode 100644 net/core/flow_offload.c

-- 
2.11.0