From: Yuri Benditovich <yuri.benditovich@daynix.com> To: Jason Wang <jasowang@redhat.com> Cc: "David S. Miller" <davem@davemloft.net>, Jakub Kicinski <kuba@kernel.org>, "Michael S . Tsirkin" <mst@redhat.com>, Network Development <netdev@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>, virtualization@lists.linux-foundation.org, Yan Vugenfirer <yan@daynix.com> Subject: Re: [PATCH 2/4] virtio-net: add support of UDP segmentation (USO) on the host Date: Tue, 11 May 2021 11:23:50 +0300 [thread overview] Message-ID: <CAOEp5Ofi52eCV1R261afkC2Oqgn5v8V6w3QQP8tHWcEiLmsUSQ@mail.gmail.com> (raw) In-Reply-To: <0e31ea70-f12a-070e-c72b-6e1d337a89bc@redhat.com> On Tue, May 11, 2021 at 9:47 AM Jason Wang <jasowang@redhat.com> wrote: > > > 在 2021/5/11 下午12:42, Yuri Benditovich 写道: > > Large UDP packet provided by the guest with GSO type set to > > VIRTIO_NET_HDR_GSO_UDP_L4 will be divided to several UDP > > packets according to the gso_size field. > > > > Signed-off-by: Yuri Benditovich <yuri.benditovich@daynix.com> > > --- > > include/linux/virtio_net.h | 5 +++++ > > 1 file changed, 5 insertions(+) > > > > diff --git a/include/linux/virtio_net.h b/include/linux/virtio_net.h > > index b465f8f3e554..4ecf9a1ca912 100644 > > --- a/include/linux/virtio_net.h > > +++ b/include/linux/virtio_net.h > > @@ -51,6 +51,11 @@ static inline int virtio_net_hdr_to_skb(struct sk_buff *skb, > > ip_proto = IPPROTO_UDP; > > thlen = sizeof(struct udphdr); > > break; > > + case VIRTIO_NET_HDR_GSO_UDP_L4: > > + gso_type = SKB_GSO_UDP_L4; > > + ip_proto = IPPROTO_UDP; > > + thlen = sizeof(struct udphdr); > > + break; > > > This is only for rx, how about tx? In terms of the guest this is only for TX. Guest RX is a different thing, this is actually coalescing of segmented UDP packets into a large one. This feature is not defined in the virtio spec yet and the support of it first of all depends on the OS. For example: TCP LSO (guest TX) is supported almost by all the versions of Windows. TCP RSC (coalescing of TCP segments) is supported by Win 8 / Server 2012 and up. UDP segmentation is supported by Windows kernels 1903+ UDP coalescing is defined by Windows kernels 2004+ and not supported by the driver yet. > > Thanks > > > > > default: > > return -EINVAL; > > } >
WARNING: multiple messages have this Message-ID (diff)
From: Yuri Benditovich <yuri.benditovich@daynix.com> To: Jason Wang <jasowang@redhat.com> Cc: "Michael S . Tsirkin" <mst@redhat.com>, Network Development <netdev@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>, virtualization@lists.linux-foundation.org, Yan Vugenfirer <yan@daynix.com>, Jakub Kicinski <kuba@kernel.org>, "David S. Miller" <davem@davemloft.net> Subject: Re: [PATCH 2/4] virtio-net: add support of UDP segmentation (USO) on the host Date: Tue, 11 May 2021 11:23:50 +0300 [thread overview] Message-ID: <CAOEp5Ofi52eCV1R261afkC2Oqgn5v8V6w3QQP8tHWcEiLmsUSQ@mail.gmail.com> (raw) In-Reply-To: <0e31ea70-f12a-070e-c72b-6e1d337a89bc@redhat.com> On Tue, May 11, 2021 at 9:47 AM Jason Wang <jasowang@redhat.com> wrote: > > > 在 2021/5/11 下午12:42, Yuri Benditovich 写道: > > Large UDP packet provided by the guest with GSO type set to > > VIRTIO_NET_HDR_GSO_UDP_L4 will be divided to several UDP > > packets according to the gso_size field. > > > > Signed-off-by: Yuri Benditovich <yuri.benditovich@daynix.com> > > --- > > include/linux/virtio_net.h | 5 +++++ > > 1 file changed, 5 insertions(+) > > > > diff --git a/include/linux/virtio_net.h b/include/linux/virtio_net.h > > index b465f8f3e554..4ecf9a1ca912 100644 > > --- a/include/linux/virtio_net.h > > +++ b/include/linux/virtio_net.h > > @@ -51,6 +51,11 @@ static inline int virtio_net_hdr_to_skb(struct sk_buff *skb, > > ip_proto = IPPROTO_UDP; > > thlen = sizeof(struct udphdr); > > break; > > + case VIRTIO_NET_HDR_GSO_UDP_L4: > > + gso_type = SKB_GSO_UDP_L4; > > + ip_proto = IPPROTO_UDP; > > + thlen = sizeof(struct udphdr); > > + break; > > > This is only for rx, how about tx? In terms of the guest this is only for TX. Guest RX is a different thing, this is actually coalescing of segmented UDP packets into a large one. This feature is not defined in the virtio spec yet and the support of it first of all depends on the OS. For example: TCP LSO (guest TX) is supported almost by all the versions of Windows. TCP RSC (coalescing of TCP segments) is supported by Win 8 / Server 2012 and up. UDP segmentation is supported by Windows kernels 1903+ UDP coalescing is defined by Windows kernels 2004+ and not supported by the driver yet. > > Thanks > > > > > default: > > return -EINVAL; > > } > _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization
next prev parent reply other threads:[~2021-05-11 8:26 UTC|newest] Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-05-11 4:42 [PATCH 0/4] Add host USO support to TUN device Yuri Benditovich 2021-05-11 4:42 ` Yuri Benditovich 2021-05-11 4:42 ` [PATCH 1/4] virtio-net: add definitions for host USO feature Yuri Benditovich 2021-05-11 4:42 ` Yuri Benditovich 2021-05-11 6:47 ` Jason Wang 2021-05-11 6:47 ` Jason Wang 2021-05-11 8:12 ` Yuri Benditovich 2021-05-11 8:12 ` Yuri Benditovich 2021-05-11 8:24 ` Jason Wang 2021-05-11 8:24 ` Jason Wang 2021-05-11 9:21 ` Yuri Benditovich 2021-05-11 9:21 ` Yuri Benditovich 2021-05-12 1:21 ` Jason Wang 2021-05-12 1:21 ` Jason Wang 2021-05-11 4:42 ` [PATCH 2/4] virtio-net: add support of UDP segmentation (USO) on the host Yuri Benditovich 2021-05-11 4:42 ` Yuri Benditovich 2021-05-11 6:47 ` Jason Wang 2021-05-11 6:47 ` Jason Wang 2021-05-11 8:23 ` Yuri Benditovich [this message] 2021-05-11 8:23 ` Yuri Benditovich 2021-05-11 8:31 ` Jason Wang 2021-05-11 8:31 ` Jason Wang 2021-05-11 17:47 ` Willem de Bruijn 2021-05-11 17:47 ` Willem de Bruijn 2021-05-12 6:09 ` Yuri Benditovich 2021-05-12 6:09 ` Yuri Benditovich 2021-05-12 14:32 ` Willem de Bruijn 2021-05-12 14:32 ` Willem de Bruijn 2021-05-12 18:56 ` Yuri Benditovich 2021-05-12 18:56 ` Yuri Benditovich 2021-05-12 19:53 ` Willem de Bruijn 2021-05-12 19:53 ` Willem de Bruijn 2021-05-11 4:42 ` [PATCH 3/4] tun: define feature bit for USO support Yuri Benditovich 2021-05-11 4:42 ` Yuri Benditovich 2021-05-11 4:42 ` [PATCH 4/4] tun: indicate support for USO feature Yuri Benditovich 2021-05-11 4:42 ` Yuri Benditovich 2021-05-11 6:50 ` Jason Wang 2021-05-11 6:50 ` Jason Wang 2021-05-11 8:33 ` Yuri Benditovich 2021-05-11 8:33 ` Yuri Benditovich 2021-05-11 19:06 ` Yuri Benditovich 2021-05-11 19:06 ` Yuri Benditovich 2021-05-12 1:33 ` Jason Wang 2021-05-12 1:33 ` Jason Wang 2021-05-12 5:24 ` Yuri Benditovich 2021-05-12 5:24 ` Yuri Benditovich [not found] ` <CACGkMEsZBCzV+d_eLj1aYT+pkS5m1QAy7q8rUkNsdV0C8aL8tQ@mail.gmail.com> [not found] ` <CAOEp5OeSankfA6urXLW_fquSMrZ+WYXDtKNacort1UwR=WgxqA@mail.gmail.com> [not found] ` <CACGkMEt3bZrdqbWtWjSkXvv5v8iCHiN8hkD3T602RZnb6nPd9A@mail.gmail.com> [not found] ` <CAOEp5Odw=eaQWZCXr+U8PipPtO1Avjw-t3gEdKyvNYxuNa5TfQ@mail.gmail.com> [not found] ` <CACGkMEuqXaJxGqC+CLoq7k4XDu+W3E3Kk3WvG-D6tnn2K4ZPNA@mail.gmail.com> [not found] ` <CAOEp5OfB62SQzxMj_GkVD4EM=Z+xf43TPoTZwMbPPa3BsX2ooA@mail.gmail.com> 2021-05-13 7:04 ` Jason Wang 2021-05-13 7:04 ` Jason Wang 2021-05-13 8:14 ` Yuri Benditovich 2021-05-13 8:14 ` Yuri Benditovich 2021-05-13 20:43 ` Willem de Bruijn 2021-05-13 20:43 ` Willem de Bruijn 2021-05-14 5:48 ` Yuri Benditovich 2021-05-14 5:48 ` Yuri Benditovich 2021-05-13 20:34 ` Willem de Bruijn 2021-05-13 20:34 ` Willem de Bruijn 2021-05-14 7:16 ` Jason Wang 2021-05-14 7:16 ` Jason Wang 2021-05-14 7:38 ` Yuri Benditovich 2021-05-14 7:38 ` Yuri Benditovich 2021-05-14 12:41 ` Willem de Bruijn 2021-05-14 12:41 ` Willem de Bruijn
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