netdev - Re: [PATCH RFC 0/3] vsock: add support for sockmap

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Date:   Thu, 19 Jan 2023 11:49:02 +0100
From:   Stefano Garzarella <sgarzare@...hat.com>
To:     Bobby Eshleman <bobby.eshleman@...edance.com>
Cc:     Stefan Hajnoczi <stefanha@...hat.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Andrii Nakryiko <andrii@...nel.org>,
        Mykola Lysenko <mykolal@...com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <martin.lau@...ux.dev>,
        Song Liu <song@...nel.org>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Stanislav Fomichev <sdf@...gle.com>,
        Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
        Shuah Khan <shuah@...nel.org>, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        linux-kselftest@...r.kernel.org,
        Cong Wang <cong.wang@...edance.com>
Subject: Re: [PATCH RFC 0/3] vsock: add support for sockmap

Hi Bobby,

On Wed, Jan 18, 2023 at 12:27:39PM -0800, Bobby Eshleman wrote:
>Add support for sockmap to vsock.
>
>We're testing usage of vsock as a way to redirect guest-local UDS requests to
>the host and this patch series greatly improves the performance of such a
>setup.
>
>Compared to copying packets via userspace, this improves throughput by 221% in
>basic testing.

Cool, nice series!

>
>Tested as follows.
>
>Setup: guest unix dgram sender -> guest vsock redirector -> host vsock server
>Threads: 1
>Payload: 64k
>No sockmap:
>- 76.3 MB/s
>- The guest vsock redirector was
>  "socat VSOCK-CONNECT:2:1234 UNIX-RECV:/path/to/sock"
>Using sockmap (this patch):
>- 168.8 MB/s (+221%)

Assuming the absolute value is correct, there is a typo here, it would 
be +121% right?

>- The guest redirector was a simple sockmap echo server,
>  redirecting unix ingress to vsock 2:1234 egress.
>- Same sender and server programs
>
>Only the virtio transport has been tested.

I think is fine for now.

>The loopback transport was used in
>writing bpf/selftests, but not thoroughly tested otherwise.

I did a quick review mainly for vsock stuff.
Hoping others can take a better look at net/vmw_vsock/vsock_bpf.c, since 
I'm not very familiar with that subsystem.

FYI I will be off the next two weeks (till Feb 7) with limited internet 
access.

Thanks,
Stefano

>
>This series requires the skb patch.
>
>To: Stefan Hajnoczi <stefanha@...hat.com>
>To: Stefano Garzarella <sgarzare@...hat.com>
>To: "Michael S. Tsirkin" <mst@...hat.com>
>To: Jason Wang <jasowang@...hat.com>
>To: "David S. Miller" <davem@...emloft.net>
>To: Eric Dumazet <edumazet@...gle.com>
>To: Jakub Kicinski <kuba@...nel.org>
>To: Paolo Abeni <pabeni@...hat.com>
>To: Andrii Nakryiko <andrii@...nel.org>
>To: Mykola Lysenko <mykolal@...com>
>To: Alexei Starovoitov <ast@...nel.org>
>To: Daniel Borkmann <daniel@...earbox.net>
>To: Martin KaFai Lau <martin.lau@...ux.dev>
>To: Song Liu <song@...nel.org>
>To: Yonghong Song <yhs@...com>
>To: John Fastabend <john.fastabend@...il.com>
>To: KP Singh <kpsingh@...nel.org>
>To: Stanislav Fomichev <sdf@...gle.com>
>To: Hao Luo <haoluo@...gle.com>
>To: Jiri Olsa <jolsa@...nel.org>
>To: Shuah Khan <shuah@...nel.org>
>Cc: linux-kernel@...r.kernel.org
>Cc: kvm@...r.kernel.org
>Cc: virtualization@...ts.linux-foundation.org
>Cc: netdev@...r.kernel.org
>Cc: bpf@...r.kernel.org
>Cc: linux-kselftest@...r.kernel.org
>Signed-off-by: Bobby Eshleman <bobby.eshleman@...edance.com>
>
>---
>Bobby Eshleman (3):
>      vsock: support sockmap
>      selftests/bpf: add vsock to vmtest.sh
>      selftests/bpf: Add a test case for vsock sockmap
>
> drivers/vhost/vsock.c                              |   1 +
> include/linux/virtio_vsock.h                       |   1 +
> include/net/af_vsock.h                             |  17 ++
> net/vmw_vsock/Makefile                             |   1 +
> net/vmw_vsock/af_vsock.c                           |  59 ++++++-
> net/vmw_vsock/virtio_transport.c                   |   2 +
> net/vmw_vsock/virtio_transport_common.c            |  22 +++
> net/vmw_vsock/vsock_bpf.c                          | 180 +++++++++++++++++++++
> net/vmw_vsock/vsock_loopback.c                     |   2 +
> tools/testing/selftests/bpf/config.x86_64          |   4 +
> .../selftests/bpf/prog_tests/sockmap_listen.c      | 163 +++++++++++++++++++
> tools/testing/selftests/bpf/vmtest.sh              |   1 +
> 12 files changed, 447 insertions(+), 6 deletions(-)
>---
>base-commit: f12f4326c6a75a74e908714be6d2f0e2f0fd0d76
>change-id: 20230118-support-vsock-sockmap-connectible-2e1297d2111a
>
>Best regards,
>-- 
>Bobby Eshleman <bobby.eshleman@...edance.com>
>