From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-23.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AA979C433B4 for ; Wed, 12 May 2021 01:21:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7EAB861927 for ; Wed, 12 May 2021 01:21:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230070AbhELBWy (ORCPT ); Tue, 11 May 2021 21:22:54 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:34483 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229848AbhELBWx (ORCPT ); Tue, 11 May 2021 21:22:53 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1620782505; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=WQBTeUOnJxVvQe5cf+H0ezJO8F9KLJswaFRFl5Rl3ks=; b=Vv7aQf6xuFrd1yhWsTsgrpImiOmL9LnuIYA+0PTU5KybmWs50pgiiOcz+EgG9XJG2BAYwM I2ENqEfoRaJFvJegaoSigjgktk1bpBrX3hwY4FxITNI28b15IA5aHNmlGXz/CNRZAf03wo nvqX7Q6jJBFNjMvYj0OS3JqS6Vmirnk= Received: from mail-pg1-f198.google.com (mail-pg1-f198.google.com [209.85.215.198]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-378-ORK0akqUMDWX0x-8AyKt9Q-1; Tue, 11 May 2021 21:21:42 -0400 X-MC-Unique: ORK0akqUMDWX0x-8AyKt9Q-1 Received: by mail-pg1-f198.google.com with SMTP id k9-20020a63d1090000b029021091ebb84cso12701321pgg.3 for ; Tue, 11 May 2021 18:21:42 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding :content-language; bh=WQBTeUOnJxVvQe5cf+H0ezJO8F9KLJswaFRFl5Rl3ks=; b=Q6vs6A78Y+fbuU3ttPaFvBX3pEO5kbChcvx4rPzhYR8b5IsWnTOf6lQ16x9rCJQ91H X5yS4D35Vzw/ccceaW8jQHyoc38lbKNl5z81SOdb4nzIDJ/Xq6dqlbARU2T6jv3B6KH7 YxAhkpIN4LT5U0yrDXpuGVflLhCUjelSkv/gOoYM/XVDN9XUBSLFt4ksWLEaCn55ge/7 HUAtmpLuuXX73pQ7RXaG443bjKl3RD2JIkhqWIqj454w/z/UZUUSPa5rzAsrblzK8ku7 h4eSco9G6Kyp64JlmNuLESsBxVFhwhPpavIR6AWr5yKjBVYZobWshAw86EwfjGWC8J/i boSw== X-Gm-Message-State: AOAM530LvsYsL3MDnh8gbOWzdeBOB02G5P0q8oXOptrGOGZDsz3cO/Mn NsN16rv+455j4oh1UB0or9AUC0qKfRm5VMwZcI+zmM564n8BbXTbLSMPT7RJnuFg7AzpozHzZcD VvfbhiKD5f9hNN4kpHrHeGHIe X-Received: by 2002:a65:62d7:: with SMTP id m23mr33812946pgv.244.1620782501822; Tue, 11 May 2021 18:21:41 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzjIxWtZRQoYRS6HSFMlqpYwjeopoTbiSUnpPPoiu9LAwL9NQs+qfYYo/83LXGoLG2nOAsGDQ== X-Received: by 2002:a65:62d7:: with SMTP id m23mr33812932pgv.244.1620782501503; Tue, 11 May 2021 18:21:41 -0700 (PDT) Received: from wangxiaodeMacBook-Air.local ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id gm17sm14533127pjb.11.2021.05.11.18.21.37 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 11 May 2021 18:21:40 -0700 (PDT) Subject: Re: [PATCH 1/4] virtio-net: add definitions for host USO feature To: Yuri Benditovich Cc: "David S. Miller" , Jakub Kicinski , "Michael S . Tsirkin" , Network Development , LKML , virtualization , Yan Vugenfirer References: <20210511044253.469034-1-yuri.benditovich@daynix.com> <20210511044253.469034-2-yuri.benditovich@daynix.com> <40938c20-5851-089b-c3c0-074bbd636970@redhat.com> From: Jason Wang Message-ID: Date: Wed, 12 May 2021 09:21:31 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.10.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 在 2021/5/11 下午5:21, Yuri Benditovich 写道: > On Tue, May 11, 2021 at 11:24 AM Jason Wang wrote: >> On Tue, May 11, 2021 at 4:12 PM Yuri Benditovich >> wrote: >>> On Tue, May 11, 2021 at 9:47 AM Jason Wang wrote: >>>> >>>> 在 2021/5/11 下午12:42, Yuri Benditovich 写道: >>>>> Define feature bit and GSO type according to the VIRTIO >>>>> specification. >>>>> >>>>> Signed-off-by: Yuri Benditovich >>>>> --- >>>>> include/uapi/linux/virtio_net.h | 2 ++ >>>>> 1 file changed, 2 insertions(+) >>>>> >>>>> diff --git a/include/uapi/linux/virtio_net.h b/include/uapi/linux/virtio_net.h >>>>> index 3f55a4215f11..a556ac735d7f 100644 >>>>> --- a/include/uapi/linux/virtio_net.h >>>>> +++ b/include/uapi/linux/virtio_net.h >>>>> @@ -57,6 +57,7 @@ >>>>> * Steering */ >>>>> #define VIRTIO_NET_F_CTRL_MAC_ADDR 23 /* Set MAC address */ >>>>> >>>>> +#define VIRTIO_NET_F_HOST_USO 56 /* Host can handle USO packets */ >>> This is the virtio-net feature >> Right, I miss this part. >> >>>>> #define VIRTIO_NET_F_HASH_REPORT 57 /* Supports hash report */ >>>>> #define VIRTIO_NET_F_RSS 60 /* Supports RSS RX steering */ >>>>> #define VIRTIO_NET_F_RSC_EXT 61 /* extended coalescing info */ >>>>> @@ -130,6 +131,7 @@ struct virtio_net_hdr_v1 { >>>>> #define VIRTIO_NET_HDR_GSO_TCPV4 1 /* GSO frame, IPv4 TCP (TSO) */ >>>>> #define VIRTIO_NET_HDR_GSO_UDP 3 /* GSO frame, IPv4 UDP (UFO) */ >>>>> #define VIRTIO_NET_HDR_GSO_TCPV6 4 /* GSO frame, IPv6 TCP */ >>>>> +#define VIRTIO_NET_HDR_GSO_UDP_L4 5 /* GSO frame, IPv4 UDP (USO) */ >>> This is respective GSO type >>> >>>> >>>> This is the gso_type not the feature actually. >>>> >>>> I wonder what's the reason for not >>>> >>>> 1) introducing a dedicated virtio-net feature bit for this >>>> (VIRTIO_NET_F_GUEST_GSO_UDP_L4. >>> This series is not for GUEST's feature, it is only for host feature. >>> >>>> 2) toggle the NETIF_F_GSO_UDP_L4 feature for tuntap based on the >>>> negotiated feature. >>> The NETIF_F_GSO_UDP_L4 would be required for the guest RX path. >>> The guest TX path does not require any flags to be propagated, it only >>> allows the guest to transmit large UDP packets and have them >>> automatically splitted. >>> (This is similar to HOST_UFO but does packet segmentation instead of >>> fragmentation. GUEST_UFO indeed requires a respective NETIF flag, as >>> it is unclear whether the guest is capable of receiving such packets). >> So I think it's better to implement TX/RX in the same series unless >> there's something missed: >> >> For Guest TX, NETIF_F_GSO_UDP_L4 needs to be enabled in the guest >> virtio-net only when VIRTIO_NET_F_HOST_USO is negotiated. > I understand that this is what should be done when this feature will > be added to Linux virtio-net driver. > But at the moment we do not have enough resources to work on it. > Currently we have a clear use case and ability to test in on Windows guest. > Respective QEMU changes are pending for kernel patches, current > reference is https://github.com/daynix/qemu/tree/uso This looks fine but as replied in another thread. We can test both TX and RX with Linux guests simply: We can just use 2 VMs, and let one VM send GSO_UDP_L4 packet to another, then both tx and rx in both guest (virtio-net) and host (virtio-net) are tested? Thanks > >> For guest RX, NETIF_F_GSO_UDP_L4 needs to be enabled on the host >> tuntap only when VIRTIO_NET_F_GUEST_USO is neogiated. > Currently we are not able to use guest RX UDP GSO. > In order to do that we at least should be able to build our Windows > drivers with the most updated driver development kit (2004+). > At the moment we can't, this task is in a plan but can take several > months. So we do not have a test/use case with Windows VM. > > >> Thanks >> >>>> Thanks >>>> >>>> >>>>> #define VIRTIO_NET_HDR_GSO_ECN 0x80 /* TCP has ECN set */ >>>>> __u8 gso_type; >>>>> __virtio16 hdr_len; /* Ethernet + IP + tcp/udp hdrs */ From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-20.1 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 03EA0C433B4 for ; Wed, 12 May 2021 01:21:54 +0000 (UTC) Received: from smtp1.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 898116192A for ; 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Tsirkin" , Network Development , LKML , virtualization , Yan Vugenfirer , Jakub Kicinski , "David S. Miller" X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" CuWcqCAyMDIxLzUvMTEg5LiL5Y2INToyMSwgWXVyaSBCZW5kaXRvdmljaCDlhpnpgZM6Cj4gT24g VHVlLCBNYXkgMTEsIDIwMjEgYXQgMTE6MjQgQU0gSmFzb24gV2FuZyA8amFzb3dhbmdAcmVkaGF0 LmNvbT4gd3JvdGU6Cj4+IE9uIFR1ZSwgTWF5IDExLCAyMDIxIGF0IDQ6MTIgUE0gWXVyaSBCZW5k aXRvdmljaAo+PiA8eXVyaS5iZW5kaXRvdmljaEBkYXluaXguY29tPiB3cm90ZToKPj4+IE9uIFR1 ZSwgTWF5IDExLCAyMDIxIGF0IDk6NDcgQU0gSmFzb24gV2FuZyA8amFzb3dhbmdAcmVkaGF0LmNv bT4gd3JvdGU6Cj4+Pj4KPj4+PiDlnKggMjAyMS81LzExIOS4i+WNiDEyOjQyLCBZdXJpIEJlbmRp dG92aWNoIOWGmemBkzoKPj4+Pj4gRGVmaW5lIGZlYXR1cmUgYml0IGFuZCBHU08gdHlwZSBhY2Nv 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