From: Ido Schimmel <ido...@mellanox.com> Petr says:
A recent patch set added the ability to mirror buffer related drops (e.g., early drops) through a netdev. This patch set adds the ability to trap such packets to the local CPU for analysis. The trapping towards the CPU is configured by using tc-trap action instead of tc-mirred as was done when the packets were mirrored through a netdev. A future patch set will also add the ability to sample the dropped packets using tc-sample action. The buffer related drop traps are added to devlink, which means that the dropped packets can be reported to user space via the kernel's drop_monitor module. Patch set overview: Patch #1 adds the early_drop trap to devlink Patch #2 adds extack to a few devlink operations to facilitate better error reporting to user space. This is necessary - among other things - because the action of buffer drop traps cannot be changed in mlxsw Patch #3 performs a small refactoring in mlxsw, patch #4 fixes a bug that this patchset would trigger. Patches #5-#6 add the infrastructure required to support different traps / trap groups in mlxsw per-ASIC. This is required because buffer drop traps are not supported by Spectrum-1 Patch #7 extends mlxsw to register the early_drop trap Patch #8 adds the offload logic for the "trap" action at a qevent block. Patch #9 adds a mlxsw-specific selftest. Amit Cohen (1): devlink: Add early_drop trap Ido Schimmel (5): devlink: Pass extack when setting trap's action and group's parameters mlxsw: spectrum_trap: Use 'size_t' for array sizes mlxsw: spectrum_trap: Allow for per-ASIC trap groups initialization mlxsw: spectrum_trap: Allow for per-ASIC traps initialization mlxsw: spectrum_trap: Add early_drop trap Petr Machata (3): mlxsw: spectrum_span: On policer_id_base_ref_count, use dec_and_test mlxsw: spectrum_qdisc: Offload action trap for qevents selftests: mlxsw: RED: Test offload of trapping on RED qevents .../networking/devlink/devlink-trap.rst | 4 + drivers/net/ethernet/mellanox/mlxsw/core.c | 10 +- drivers/net/ethernet/mellanox/mlxsw/core.h | 19 +- drivers/net/ethernet/mellanox/mlxsw/reg.h | 1 + .../net/ethernet/mellanox/mlxsw/spectrum.c | 3 + .../net/ethernet/mellanox/mlxsw/spectrum.h | 14 +- .../ethernet/mellanox/mlxsw/spectrum_qdisc.c | 75 +++++- .../ethernet/mellanox/mlxsw/spectrum_span.c | 3 +- .../ethernet/mellanox/mlxsw/spectrum_trap.c | 255 ++++++++++++++++-- .../ethernet/mellanox/mlxsw/spectrum_trap.h | 18 +- drivers/net/netdevsim/dev.c | 6 +- include/net/devlink.h | 9 +- net/core/devlink.c | 9 +- .../drivers/net/mlxsw/sch_red_core.sh | 35 ++- .../drivers/net/mlxsw/sch_red_ets.sh | 11 + 15 files changed, 406 insertions(+), 66 deletions(-) -- 2.26.2
