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Subject: [PATCH bpf V8 0/7] XDP-hints: API change for RX-hash kfunc
 bpf_xdp_metadata_rx_hash
From:   Jesper Dangaard Brouer <brouer@redhat.com>
To:     bpf@vger.kernel.org, Stanislav Fomichev <sdf@google.com>,
        =?utf-8?q?Toke_H=C3=B8iland-J=C3=B8rgensen?= <toke@redhat.com>
Cc:     Jesper Dangaard Brouer <brouer@redhat.com>, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org, martin.lau@kernel.org,
        ast@kernel.org, daniel@iogearbox.net, alexandr.lobakin@intel.com,
        larysa.zaremba@intel.com, xdp-hints@xdp-project.net,
        anthony.l.nguyen@intel.com, yoong.siang.song@intel.com,
        boon.leong.ong@intel.com, intel-wired-lan@lists.osuosl.org,
        pabeni@redhat.com, jesse.brandeburg@intel.com, kuba@kernel.org,
        edumazet@google.com, john.fastabend@gmail.com, hawk@kernel.org,
        davem@davemloft.net, tariqt@nvidia.com, saeedm@nvidia.com,
        leon@kernel.org, linux-rdma@vger.kernel.org
Date:   Wed, 12 Apr 2023 14:42:37 +0200
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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 change the function call signature via adding
a pointer value argument for providing the RSS hash type.

Patchset also disables all bpf_printk's from xdp_hw_metadata program
that we expect driver developers to use. Instead counters are introduced
for relaying e.g. skip and fail info to end-user, this can be further
debugged by re-enabling bpf_printk (when driver devel troubleshoot).

---

Jesper Dangaard Brouer (7):
      selftests/bpf: xdp_hw_metadata default disable bpf_printk
      selftests/bpf: Add counters to xdp_hw_metadata
      xdp: rss hash types representation
      mlx5: bpf_xdp_metadata_rx_hash add xdp rss hash type
      veth: bpf_xdp_metadata_rx_hash add xdp rss hash type
      mlx4: bpf_xdp_metadata_rx_hash add xdp rss hash type
      selftests/bpf: Adjust bpf_xdp_metadata_rx_hash for new arg


 drivers/net/ethernet/mellanox/mlx4/en_rx.c    | 22 ++++++-
 drivers/net/ethernet/mellanox/mlx4/mlx4_en.h  |  3 +-
 .../net/ethernet/mellanox/mlx5/core/en/xdp.c  | 63 ++++++++++++++++++-
 drivers/net/veth.c                            | 10 ++-
 include/linux/mlx5/device.h                   | 14 ++++-
 include/linux/netdevice.h                     |  3 +-
 include/net/xdp.h                             | 47 ++++++++++++++
 net/core/xdp.c                                | 10 ++-
 .../selftests/bpf/prog_tests/xdp_metadata.c   |  2 +
 .../selftests/bpf/progs/xdp_hw_metadata.c     | 42 ++++++++++---
 .../selftests/bpf/progs/xdp_metadata.c        |  6 +-
 .../selftests/bpf/progs/xdp_metadata2.c       |  7 ++-
 tools/testing/selftests/bpf/xdp_hw_metadata.c | 10 ++-
 tools/testing/selftests/bpf/xdp_metadata.h    |  4 ++
 14 files changed, 213 insertions(+), 30 deletions(-)

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