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

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Date:   Thu, 30 Mar 2023 03:09:22 +0300
From:   Andrew Melnichenko <andrew@...nix.com>
To:     Xuan Zhuo <xuanzhuo@...ux.alibaba.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.

Oh yeah, I'll fix that. Thank you!

On Wed, Mar 29, 2023 at 2:52 PM Xuan Zhuo <xuanzhuo@...ux.alibaba.com> wrote:
>
> 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
> >