Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Thu, 30 Mar 2023 11:38:26 -0700
In-Reply-To: <168019602958.3557870.9960387532660882277.stgit@firesoul>
Mime-Version: 1.0
References: <168019602958.3557870.9960387532660882277.stgit@firesoul>
Message-ID: <ZCXXIvvnTBch/0Oz@google.com>
Subject: Re: [PATCH bpf RFC-V3 0/5] XDP-hints: API change for RX-hash kfunc bpf_xdp_metadata_rx_hash
From:   Stanislav Fomichev <sdf@google.com>
To:     Jesper Dangaard Brouer <brouer@redhat.com>
Cc:     bpf@vger.kernel.org, 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
Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes
Precedence: bulk

On 03/30, Jesper Dangaard Brouer wrote:
> 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 change the function call signature via adding
> a pointer value argument for 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.

LGTM with one nit about EMIT_BTF.

> ---

> Jesper Dangaard Brouer (5):
>        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                            | 11 +++-
>   include/linux/mlx5/device.h                   | 14 ++++-
>   include/linux/netdevice.h                     |  3 +-
>   include/net/xdp.h                             | 49 +++++++++++++++
>   net/core/xdp.c                                | 10 ++-
>   .../selftests/bpf/prog_tests/xdp_metadata.c   |  2 +
>   .../selftests/bpf/progs/xdp_hw_metadata.c     | 14 +++--
>   .../selftests/bpf/progs/xdp_metadata.c        |  6 +-
>   .../selftests/bpf/progs/xdp_metadata2.c       |  7 ++-
>   tools/testing/selftests/bpf/xdp_hw_metadata.c |  2 +-
>   tools/testing/selftests/bpf/xdp_metadata.h    |  1 +
>   14 files changed, 183 insertions(+), 24 deletions(-)

> --