netdev - Re: [PATCH bpf-next v3 1/2] bpf, xdp: per-map bpf_redirect

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Date:   Mon, 22 Feb 2021 08:23:01 +0100
From:   Jesper Dangaard Brouer <brouer@...hat.com>
To:     Björn Töpel <bjorn.topel@...il.com>
Cc:     brouer@...hat.com, ast@...nel.org, daniel@...earbox.net,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        Björn Töpel 
        <bjorn.topel@...el.com>, maciej.fijalkowski@...el.com,
        hawk@...nel.org, toke@...hat.com, magnus.karlsson@...el.com,
        john.fastabend@...il.com, kuba@...nel.org, davem@...emloft.net
Subject: Re: [PATCH bpf-next v3 1/2] bpf, xdp: per-map bpf_redirect_map
 functions for XDP

On Sun, 21 Feb 2021 21:09:53 +0100
Björn Töpel <bjorn.topel@...il.com> wrote:

> From: Björn Töpel <bjorn.topel@...el.com>
> 
> Currently the bpf_redirect_map() implementation dispatches to the
> correct map-lookup function via a switch-statement. To avoid the
> dispatching, this change adds one bpf_redirect_map() implementation per
> map. Correct function is automatically selected by the BPF verifier.
> 
> v2->v3 : Fix build when CONFIG_NET is not set. (lkp)
> v1->v2 : Re-added comment. (Toke)
> rfc->v1: Get rid of the macro and use __always_inline. (Jesper)
> 
> Acked-by: Toke Høiland-Jørgensen <toke@...hat.com>
> Signed-off-by: Björn Töpel <bjorn.topel@...el.com>
> ---
>  include/linux/bpf.h    | 20 +++++++-------
>  include/linux/filter.h |  9 +++++++
>  include/net/xdp_sock.h |  6 ++---
>  kernel/bpf/cpumap.c    |  2 +-
>  kernel/bpf/devmap.c    |  4 +--
>  kernel/bpf/verifier.c  | 17 ++++++++----
>  net/core/filter.c      | 61 ++++++++++++++++++++++++++++--------------
>  7 files changed, 78 insertions(+), 41 deletions(-)

Love it! :-)

Acked-by: Jesper Dangaard Brouer <brouer@...hat.com>

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