[bpf,RFC-V2,0/5] XDP-hints: API change for RX-hash kfunc bpf_xdp_metadata_rx_hash

Message

Jesper Dangaard Brouer March 29, 2023, 4:28 p.m. UTC

Notice targeted 6.3-rc kernel via bpf git tree.

Current API for bpf_xdp_metadata_rx_hash() returns the raw RSS hash value,
but doesn't provide information on the RSS hash type (part of 6.3-rc).

This patchset proposal is to use the return value from
bpf_xdp_metadata_rx_hash() to provide the RSS hash type.

Alternatively we disable bpf_xdp_metadata_rx_hash() in 6.3-rc, and have
more time to nitpick the RSS hash-type bits.

---

Jesper Dangaard Brouer (5):
      xdp: rss hash types representation
      igc: bpf_xdp_metadata_rx_hash return xdp rss hash type
      veth: bpf_xdp_metadata_rx_hash return xdp rss hash type
      mlx5: bpf_xdp_metadata_rx_hash return xdp rss hash type
      mlx4: bpf_xdp_metadata_rx_hash return xdp rss hash type


 drivers/net/ethernet/intel/igc/igc_main.c     | 22 +++++-
 drivers/net/ethernet/mellanox/mlx4/en_rx.c    | 20 ++++-
 .../net/ethernet/mellanox/mlx5/core/en/xdp.c  | 61 +++++++++++++-
 drivers/net/veth.c                            |  7 +-
 include/linux/mlx5/device.h                   | 14 +++-
 include/net/xdp.h                             | 79 +++++++++++++++++++
 net/core/xdp.c                                |  4 +-
 7 files changed, 196 insertions(+), 11 deletions(-)

--
Best regards,
  Jesper Dangaard Brouer
  MSc.CS, Sr. Principal Kernel Engineer at Red Hat
  LinkedIn: http://www.linkedin.com/in/brouer