netdev - Re: [RFC PATCH 0/4] eBPF RSS through QMP support.

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Date:   Wed, 29 Mar 2023 19:51:03 +0800
From:   Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
To:     Andrew Melnychenko <andrew@...nix.com>
Cc:     yan@...nix.com, yuri.benditovich@...nix.com, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        mst@...hat.com, jasowang@...hat.com, yoshfuji@...ux-ipv6.org,
        dsahern@...nel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org
Subject: Re: [RFC PATCH 0/4] eBPF RSS through QMP support.

Is this a patch-set of QEMU? If yes, why are the email lists all kernel mail
list without QEMU mail list?

Thanks.

On Wed, 29 Mar 2023 13:45:41 +0300, Andrew Melnychenko <andrew@...nix.com> wrote:
> This series of patches provides the ability to retrieve eBPF program
> through qmp, so management application may load bpf blob with proper capabilities.
> Now, virtio-net devices can accept eBPF programs and maps through properties
> as external file descriptors. Access to the eBPF map is direct through mmap()
> call, so it should not require additional capabilities to bpf* calls.
> eBPF file descriptors can be passed to QEMU from parent process or by unix
> socket with sendfd() qmp command.
>
> Overall, the basic scenario of using the helper looks like this:
>  * Libvirt checks for ebpf_fds property.
>  * Libvirt requests eBPF blob through QMP.
>  * Libvirt loads blob for virtio-net.
>  * Libvirt launches the QEMU with eBPF fds passed.
>
> Andrew Melnychenko (4):
>   ebpf: Added eBPF initialization by fds and map update.
>   virtio-net: Added property to load eBPF RSS with fds.
>   ebpf: Added declaration/initialization routines.
>   qmp: Added new command to retrieve eBPF blob.
>
>  ebpf/ebpf.c                    |  48 +++++++++++++
>  ebpf/ebpf.h                    |  25 +++++++
>  ebpf/ebpf_rss-stub.c           |   6 ++
>  ebpf/ebpf_rss.c                | 124 +++++++++++++++++++++++++++------
>  ebpf/ebpf_rss.h                |  10 +++
>  ebpf/meson.build               |   1 +
>  hw/net/virtio-net.c            |  77 ++++++++++++++++++--
>  include/hw/virtio/virtio-net.h |   1 +
>  monitor/qmp-cmds.c             |  17 +++++
>  qapi/misc.json                 |  25 +++++++
>  10 files changed, 307 insertions(+), 27 deletions(-)
>  create mode 100644 ebpf/ebpf.c
>  create mode 100644 ebpf/ebpf.h
>
> --
> 2.39.1
>