[PATCH iwl-next v2 00/10] Add ACL support

[Marcin Szycik <marcin.szycik@linux.intel.com>]

E8xx hardware provides a Ternary Classifier block for implementing
functions such as ACL (Access Control List). In this series it's simply
referred to as "ACL".

Implement ACL filtering. This expands support of network flow classification
rules for the ethtool ntuple command. ACL filtering allows for an ip or port
field's optional mask to be specified.

Example filters:
  ethtool -N eth0 flow-type tcp4 dst-port 8880 m 0x00ff action 10
  ethtool -N eth0 flow-type tcp4 src-ip 192.168.0.55 m 0.0.0.255 action -1

This is a resurrection of an old series from 2020 [1] with several
improvements, but the fundamental logic unchanged. v1 was almost pulled
in, but ultimately it was decided to drop it [2] because of unresolved
issues. One issue was too many defensive NULL checks. Second issue is
about inconsistency when using multiple input sets. Both are addressed
in this patchset.

More about the second issue:

From [3]:
>I would argue that you need to have some sort of logic that basically
>checks to see if you are going to hit the input set issue and falls
>back and applies the ACL rules. Otherwise you are significantly
>hampering the usefulness of this filter type. It doesn't make sense
>that dropping a field will cause a rule to fail to be added, but
>masking a single bit in some field will make it valid. It would make
>it a nightmare to use from the user point of view as the rules come
>across as arbitrary.

Flow Director (FD) has a hardware limitation where all filters for the same
packet type must use identical input sets. Previously, attempting to add the
second filter would fail.

Patch 10 adds automatic fallback to ACL block when FD cannot accommodate a
filter due to input set conflicts, which resolves this inconsistency.

v2:
* Rebase. Notable conflicts were the removal of ice_status and the addition of
  libie (which affected AdminQ communication)
* Reduce the number of defensive NULL checks
* Use = {} instead of memset for definitions
* Use kzalloc_obj() instead of plain kzalloc()
* Move from devm_ to plain allocation for objects that don't require it
* Move iterator declaration to loop start
* Move some defines out of structs
* Fix kdoc (except untouched ice_ethtool_fdir.c functions)
* Adjust style (err for return variable, spacing, rewrite some comments,
* commit messages)
* Remove overly verbose comments
* Add patches 5, 6, 9 and 10
* More changes listed in patches (if applicable)

[1] https://lore.kernel.org/intel-wired-lan/20200914153720.48498-1-anthony.l.nguyen@intel.com
[2] https://lore.kernel.org/netdev/7192efe4d27c93148b3205e65f37203c89170316.camel@intel.com/#t
[3] https://lore.kernel.org/netdev/CAKgT0Ucxd5-gvEwWAdbL04ER2o++RX_oekUV3E0rYquEgFKj1w@mail.gmail.com

Lukasz Czapnik (1):
  ice: use ACL for ntuple rules that conflict with FDir

Marcin Szycik (3):
  Revert "ice: remove unused ice_flow_entry fields"
  ice: use plain alloc/dealloc for ice_ntuple_fltr
  ice: re-introduce ice_dealloc_flow_entry() helper

Real Valiquette (5):
  ice: initialize ACL table
  ice: initialize ACL scenario
  ice: create flow profile
  ice: create ACL entry
  ice: program ACL entry

Tony Nguyen (1):
  ice: rename shared Flow Director functions and structs

 drivers/net/ethernet/intel/ice/Makefile       |    5 +-
 drivers/net/ethernet/intel/ice/ice.h          |   21 +-
 drivers/net/ethernet/intel/ice/ice_acl.h      |  170 +++
 drivers/net/ethernet/intel/ice/ice_acl_main.h |    9 +
 .../net/ethernet/intel/ice/ice_adminq_cmd.h   |  391 +++++-
 drivers/net/ethernet/intel/ice/ice_arfs.h     |    2 +-
 drivers/net/ethernet/intel/ice/ice_fdir.h     |   18 +-
 .../net/ethernet/intel/ice/ice_flex_pipe.h    |    2 +
 drivers/net/ethernet/intel/ice/ice_flow.h     |   39 +-
 .../net/ethernet/intel/ice/ice_lan_tx_rx.h    |    3 +
 drivers/net/ethernet/intel/ice/ice_type.h     |    5 +
 drivers/net/ethernet/intel/ice/ice_acl.c      |  486 +++++++
 drivers/net/ethernet/intel/ice/ice_acl_ctrl.c | 1111 +++++++++++++++
 drivers/net/ethernet/intel/ice/ice_acl_main.c |  293 ++++
 drivers/net/ethernet/intel/ice/ice_arfs.c     |    8 +-
 drivers/net/ethernet/intel/ice/ice_ethtool.c  |    8 +-
 ...ce_ethtool_fdir.c => ice_ethtool_ntuple.c} |  641 ++++++---
 drivers/net/ethernet/intel/ice/ice_fdir.c     |   30 +-
 .../net/ethernet/intel/ice/ice_flex_pipe.c    |   11 +-
 drivers/net/ethernet/intel/ice/ice_flow.c     | 1208 ++++++++++++++++-
 drivers/net/ethernet/intel/ice/ice_lib.c      |   10 +-
 drivers/net/ethernet/intel/ice/ice_main.c     |   91 +-
 drivers/net/ethernet/intel/ice/virt/fdir.c    |   32 +-
 23 files changed, 4344 insertions(+), 250 deletions(-)
 create mode 100644 drivers/net/ethernet/intel/ice/ice_acl.h
 create mode 100644 drivers/net/ethernet/intel/ice/ice_acl_main.h
 create mode 100644 drivers/net/ethernet/intel/ice/ice_acl.c
 create mode 100644 drivers/net/ethernet/intel/ice/ice_acl_ctrl.c
 create mode 100644 drivers/net/ethernet/intel/ice/ice_acl_main.c
 rename drivers/net/ethernet/intel/ice/{ice_ethtool_fdir.c => ice_ethtool_ntuple.c} (79%)

-- 
2.49.0