netdev - [PATCH bpf-next 0/3] AF_XDP clean up/perf improvements

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Message-Id: <20210122105351.11751-1-bjorn.topel@gmail.com>
Date:   Fri, 22 Jan 2021 11:53:48 +0100
From:   Björn Töpel <bjorn.topel@...il.com>
To:     ast@...nel.org, daniel@...earbox.net, netdev@...r.kernel.org,
        bpf@...r.kernel.org
Cc:     Björn Töpel <bjorn.topel@...il.com>,
        bjorn.topel@...el.com, magnus.karlsson@...el.com,
        maciej.fijalkowski@...el.com, kuba@...nel.org,
        jonathan.lemon@...il.com, maximmi@...dia.com, davem@...emloft.net,
        hawk@...nel.org, john.fastabend@...il.com, ciara.loftus@...el.com,
        weqaar.a.janjua@...el.com, andrii@...nel.org
Subject: [PATCH bpf-next 0/3] AF_XDP clean up/perf improvements

This series has some clean up/performance improvements for XDP
sockets.

The first two patches are cleanups for the AF_XDP core, and the
restructure actually give a little performance boost.

The last patch adds support for selecting AF_XDP BPF program, based on
what the running kernel supports.

The patches were earlier part of the bigger "bpf_redirect_xsk()"
series [1]. I pulled out the non-controversial parts into this series.

Thanks to Maciej and Magnus for the internal review/comments!

Thanks to Toke, Alexei, and Andrii for the "auto-detection" help;
Instead of basing it on kernel version, a run-time test is
performed. Note that I did not add the probing support to libbpf.c,
where the other probes reside. Instead it's in xsk.c. The reason for
that is that AF_XDP will be moved out from libbpf post-1.0, to libxdp.

Thanks,
Björn

[1] https://lore.kernel.org/bpf/20210119155013.154808-1-bjorn.topel@gmail.com/

Björn Töpel (3):
  xsk: remove explicit_free parameter from __xsk_rcv()
  xsk: fold xp_assign_dev and __xp_assign_dev
  libbpf, xsk: select AF_XDP BPF program based on kernel version

 net/xdp/xsk.c           | 47 +++++++++++++++--------
 net/xdp/xsk_buff_pool.c | 12 ++----
 tools/lib/bpf/xsk.c     | 82 +++++++++++++++++++++++++++++++++++++++--
 3 files changed, 113 insertions(+), 28 deletions(-)

base-commit: 443edcefb8213155c0da22c4a999f4a49858fa39
-- 
2.27.0