netdev - Re: [bpf-next PATCH v3] bpf: Add rx_queue_mapping to bpf

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Message-ID: <CAADnVQLk_aWFOAaJMZyBPwaE6Bw0RTe+im0AA1WcoxYeG69jEQ@mail.gmail.com>
Date:   Mon, 1 Jun 2020 13:23:31 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Amritha Nambiar <amritha.nambiar@...el.com>
Cc:     Network Development <netdev@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Daniel Borkmann <daniel@...earbox.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Sridhar Samudrala <sridhar.samudrala@...el.com>
Subject: Re: [bpf-next PATCH v3] bpf: Add rx_queue_mapping to bpf_sock

On Tue, May 26, 2020 at 5:34 PM Amritha Nambiar
<amritha.nambiar@...el.com> wrote:
>
> Add "rx_queue_mapping" to bpf_sock. This gives read access for the
> existing field (sk_rx_queue_mapping) of struct sock from bpf_sock.
> Semantics for the bpf_sock rx_queue_mapping access are similar to
> sk_rx_queue_get(), i.e the value NO_QUEUE_MAPPING is not allowed
> and -1 is returned in that case. This is useful for transmit queue
> selection based on the received queue index which is cached in the
> socket in the receive path.
>
> v3: Addressed review comments to add usecase in patch description,
>     and fixed default value for rx_queue_mapping.
> v2: fixed build error for CONFIG_XPS wrapping, reported by
>     kbuild test robot <lkp@...el.com>
>
> Signed-off-by: Amritha Nambiar <amritha.nambiar@...el.com>

Applied. Thanks