linux-kernel - Re: [RFC bpf-next 0/6] Add bpf_xdp_get_xfrm

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Message-ID: <ZT2/z1pbufL0fYqe@moon.secunet.de>
Date:   Sun, 29 Oct 2023 03:13:35 +0100
From:   Antony Antony <antony.antony@...unet.com>
To:     Daniel Xu <dxu@...uu.xyz>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <bpf@...r.kernel.org>, <linux-kselftest@...r.kernel.org>,
        <steffen.klassert@...unet.com>, <antony.antony@...unet.com>,
        <devel@...ux-ipsec.org>
Subject: Re: [RFC bpf-next 0/6] Add bpf_xdp_get_xfrm_state() kfunc

On Fri, Oct 27, 2023 at 12:46:16 -0600, Daniel Xu wrote:
> This patchset adds a kfunc helper, bpf_xdp_get_xfrm_state(), that wraps
> xfrm_state_lookup(). The intent is to support software RSS (via XDP) for
> the ongoing/upcoming ipsec pcpu work [0]. Recent experiments performed
> on (hopefully) reproducible AWS testbeds indicate that single tunnel
> pcpu ipsec can reach line rate on 100G ENA nics.
> 
> More details about that will be presented at netdev next week [1].
> 
> Antony did the initial stable bpf helper - I later ported it to unstable
> kfuncs. So for the series, please apply a Co-developed-by for Antony,
> provided he acks and signs off on this.

Thanks Daniel for working on this and bringing it upstreadm.

Co-developed-by: Antony Antony <antony.antony@...unet.com>
Signed-off-by: Antony Antony <antony.antony@...unet.com>

> 
> [0]: https://datatracker.ietf.org/doc/html/draft-ietf-ipsecme-multi-sa-performance-02
> [1]: https://netdevconf.info/0x17/sessions/workshop/security-workshop.html
> 
> Daniel Xu (6):
>   bpf: xfrm: Add bpf_xdp_get_xfrm_state() kfunc
>   bpf: selftests: test_tunnel: Use ping -6 over ping6
>   bpf: selftests: test_tunnel: Mount bpffs if necessary
>   bpf: selftests: test_tunnel: Use vmlinux.h declarations
>   bpf: selftests: test_tunnel: Disable CO-RE relocations
>   bpf: xfrm: Add selftest for bpf_xdp_get_xfrm_state()
> 
>  include/net/xfrm.h                            |   9 ++
>  net/xfrm/Makefile                             |   1 +
>  net/xfrm/xfrm_policy.c                        |   2 +
>  net/xfrm/xfrm_state_bpf.c                     | 105 ++++++++++++++++++
>  .../selftests/bpf/progs/bpf_tracing_net.h     |   1 +
>  .../selftests/bpf/progs/test_tunnel_kern.c    |  95 +++++++++-------
>  tools/testing/selftests/bpf/test_tunnel.sh    |  43 ++++---
>  7 files changed, 202 insertions(+), 54 deletions(-)
>  create mode 100644 net/xfrm/xfrm_state_bpf.c
> 
> -- 
> 2.42.0
>