This series implements initial TX metadata (offloads) for AF_XDP. See patch #2 for the main implementation and mlx5-one for the example on how to consume the metadata on the device side. With v4, I'm switching from BPF hooks and kfuncs to a fixed TX metadata/offload format: the metadata is passed with every tx umem chunk and it's up to the device driver to interpret it. Starting with two types of offloads: - request TX timestamp (and write it back into the metadata area) - request TX checksum offload TODO for the non-RFC series: - have some real device support to verify xdp_hw_metadata works - Documentation/networking/xdp-rx-metadata.rst - like documentation v3: https://lore.kernel.org/bpf/20230707193006.1309662-1-sdf@xxxxxxxxxx/ Stanislav Fomichev (8): xsk: Support XDP_TX_METADATA_LEN xsk: add TX timestamp and TX checksum offload support net/mlx5e: Implement AF_XDP TX timestamp and checksum offload tools: ynl: update netdev sample to dump xsk-features selftests/xsk: Support XDP_TX_METADATA_LEN selftests/bpf: Add csum helpers selftests/bpf: Add TX side to xdp_metadata selftests/bpf: Add TX side to xdp_hw_metadata Documentation/netlink/specs/netdev.yaml | 25 ++- drivers/net/ethernet/mellanox/mlx5/core/en.h | 4 +- .../net/ethernet/mellanox/mlx5/core/en/xdp.c | 71 ++++++- .../net/ethernet/mellanox/mlx5/core/en/xdp.h | 10 +- .../ethernet/mellanox/mlx5/core/en/xsk/tx.c | 9 +- .../net/ethernet/mellanox/mlx5/core/en_main.c | 1 + include/linux/netdevice.h | 27 +++ include/linux/skbuff.h | 5 +- include/net/xdp_sock.h | 61 ++++++ include/net/xdp_sock_drv.h | 13 ++ include/net/xsk_buff_pool.h | 1 + include/uapi/linux/if_xdp.h | 36 ++++ include/uapi/linux/netdev.h | 15 ++ net/core/netdev-genl.c | 12 +- net/xdp/xsk.c | 58 +++++ net/xdp/xsk_buff_pool.c | 1 + net/xdp/xsk_queue.h | 19 +- tools/include/uapi/linux/if_xdp.h | 50 ++++- tools/include/uapi/linux/netdev.h | 15 ++ tools/net/ynl/generated/netdev-user.c | 25 +++ tools/net/ynl/generated/netdev-user.h | 5 + tools/net/ynl/samples/netdev.c | 8 + tools/testing/selftests/bpf/network_helpers.h | 43 ++++ .../selftests/bpf/prog_tests/xdp_metadata.c | 31 ++- tools/testing/selftests/bpf/xdp_hw_metadata.c | 201 +++++++++++++++++- tools/testing/selftests/bpf/xsk.c | 17 ++ tools/testing/selftests/bpf/xsk.h | 1 + 27 files changed, 718 insertions(+), 46 deletions(-) -- 2.41.0.487.g6d72f3e995-goog
