Blackhole routes are routes that cause matching packets to be silently dropped. This is in contrast to unreachable routes that generate an ICMP host unreachable packet in response.
The driver currently programs both route types with a trap action and lets the kernel drop matching packets. This is sub-optimal as packets routed using a blackhole route can be directly dropped by the ASIC. Patch #1 alters mlxsw to program blackhole routes with a discard action. Patch #2 adds a matching test. Ido Schimmel (2): mlxsw: spectrum_router: Offload blackhole routes selftests: mlxsw: Add a test for blackhole routes .../ethernet/mellanox/mlxsw/spectrum_router.c | 27 ++- .../drivers/net/mlxsw/blackhole_routes.sh | 200 ++++++++++++++++++ 2 files changed, 225 insertions(+), 2 deletions(-) create mode 100755 tools/testing/selftests/drivers/net/mlxsw/blackhole_routes.sh -- 2.20.1
