[PATCH 0/3] macsec: Add support for VLAN filtering in offload mode

[Cosmin Ratiu <cratiu@nvidia.com>]

This short series adds support for VLANs in macsec devices when offload
mode is enabled. This allows VLAN netdevs on top of macsec netdevs to
function, which accidentally used to be the case in the past, but was
broken. This series adds back proper support.

As part of this, the existing nsim-only macsec offload tests were
translated to Python so they can run against real HW and new
traffic-based tests were added for VLAN filter propagation, since
there's currently no uAPI to check VLAN filters.

V4:
- Migrated nsim-only macsec tests to Python, usable against real hw.
- Ran these tests against both nsim and mlx5 devs.
- Gave up on nsim patches since the tests no longer use them.

V3: https://lore.kernel.org/netdev/20260306151004.2862198-1-cratiu@nvidia.com/t/#u
- Moved back to net.
- Added proper rollback support for VLAN filters in case of failure.
- Added VLAN as a requirement for the new macsec tests.

V2: https://lore.kernel.org/netdev/20260227090227.1552512-1-cratiu@nvidia.com/
- Sent to net-next instead of net because of apparent complexity.
- Changed VLAN filtering to only function in offload mode.
- Added tests.

V1: https://lore.kernel.org/netdev/20260107104723.2750725-1-cratiu@nvidia.com/


Cosmin Ratiu (3):
  selftests: Migrate nsim-only MACsec tests to Python
  selftests: Add MACsec VLAN propagation traffic test
  macsec: Support VLAN-filtering lower devices

 drivers/net/macsec.c                          |  44 +++++-
 tools/testing/selftests/drivers/net/Makefile  |   6 +
 .../selftests/drivers/net/macsec_api.py       | 103 ++++++++++++++
 .../selftests/drivers/net/macsec_lib.py       |  20 +++
 .../selftests/drivers/net/macsec_traffic.py   | 126 ++++++++++++++++++
 .../selftests/drivers/net/netdevsim/Makefile  |   1 -
 .../drivers/net/netdevsim/macsec-offload.sh   | 117 ----------------
 7 files changed, 294 insertions(+), 123 deletions(-)
 create mode 100755 tools/testing/selftests/drivers/net/macsec_api.py
 create mode 100644 tools/testing/selftests/drivers/net/macsec_lib.py
 create mode 100755 tools/testing/selftests/drivers/net/macsec_traffic.py
 delete mode 100755 tools/testing/selftests/drivers/net/netdevsim/macsec-offload.sh

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2.43.0