[PATCH net-next 0/8] use tc_cls_can_offload_and_chain0() throughout the drivers

[Jakub Kicinski <jakub.kicinski@netronome.com>]

Hi!

This set makes most drivers use a new tc_cls_can_offload_and_chain0()
helper which will set extack in case TC hw offload flag is disabled.
i40e patch will follow after net -> net-next merge.

I chose to keep the new helper which also looks at the chain but
renamed it more appropriately.  The rationale being that most drivers
don't accept chains other than 0 and since we have to pass extack
to the helper we can as well pass the entire struct tc_cls_common_offload
and perform the most common checks.  Jiri, please let me know if that's
acceptable for you.

This code makes the assumption that type_data in the callback can
be interpreted as struct tc_cls_common_offload, i.e. the real offload
structure has common part as the first member.  This allows us to
make the check once for all classifier types if driver supports
more than one.  This also means I've dropped the last patch of
the RFC (preventing use of common before type validation in nfp).

Jakub Kicinski (8):
  pkt_cls: add new tc cls helper to check offload flag and chain index
  bnxt: use tc_cls_can_offload_and_chain0()
  nfp: flower: use tc_cls_can_offload_and_chain0()
  cxgb4: use tc_cls_can_offload_and_chain0()
  ixgbe: use tc_cls_can_offload_and_chain0()
  mlx5: use tc_cls_can_offload_and_chain0()
  mlxsw: use tc_cls_can_offload_and_chain0()
  selftests/bpf: check for spurious extacks from the driver

 drivers/net/ethernet/broadcom/bnxt/bnxt.c          |  3 ++-
 drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c       |  3 ---
 drivers/net/ethernet/broadcom/bnxt/bnxt_vfr.c      |  3 ++-
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c    |  8 +------
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c      |  5 +---
 drivers/net/ethernet/mellanox/mlx5/core/en_main.c  |  5 +---
 drivers/net/ethernet/mellanox/mlx5/core/en_rep.c   |  5 +---
 drivers/net/ethernet/mellanox/mlxsw/spectrum.c     |  6 ++---
 drivers/net/ethernet/netronome/nfp/bpf/main.c      |  4 +---
 .../net/ethernet/netronome/nfp/flower/offload.c    |  7 +++---
 drivers/net/netdevsim/bpf.c                        |  5 +---
 include/net/pkt_cls.h                              | 12 ++++++++++
 tools/testing/selftests/bpf/test_offload.py        | 27 ++++++++++++++++++++++
 13 files changed, 54 insertions(+), 39 deletions(-)

-- 
2.15.1