On Tue, 25 Jan 2022 10:46:57 +0200, Andrew Melnychenko <andrew at daynix.com> wrote:> Added new offloads for TUN devices TUN_F_USO4 and TUN_F_USO6. > Technically they enable NETIF_F_GSO_UDP_L4 > (and only if USO4 & USO6 are set simultaneously). > It allows to transmission of large UDP packets. > > Different features USO4 and USO6 are required for qemu where Windows guests can > enable disable USO receives for IPv4 and IPv6 separately. > On the other side, Linux can't really differentiate USO4 and USO6, for now. > For now, to enable USO for TUN it requires enabling USO4 and USO6 together. > In the future, there would be a mechanism to control UDP_L4 GSO separately. > > Test it WIP Qemu https://github.com/daynix/qemu/tree/Dev_USOv2 > > New types for VirtioNet already on mailing: > https://lists.oasis-open.org/archives/virtio-comment/202110/msg00010.htmlSeems like this hasn't been upvoted yet. https://github.com/oasis-tcs/virtio-spec#use-of-github-issues Thanks.> > Also, there is a known issue with transmitting packages between two guests. > Without hacks with skb's GSO - packages are still segmented on the host's postrouting. > > Andrew Melnychenko (5): > uapi/linux/if_tun.h: Added new ioctl for tun/tap. > driver/net/tun: Added features for USO. > uapi/linux/virtio_net.h: Added USO types. > linux/virtio_net.h: Added Support for GSO_UDP_L4 offload. > drivers/net/virtio_net.c: Added USO support. > > drivers/net/tap.c | 18 ++++++++++++++++-- > drivers/net/tun.c | 15 ++++++++++++++- > drivers/net/virtio_net.c | 22 ++++++++++++++++++---- > include/linux/virtio_net.h | 11 +++++++++++ > include/uapi/linux/if_tun.h | 3 +++ > include/uapi/linux/virtio_net.h | 4 ++++ > 6 files changed, 66 insertions(+), 7 deletions(-) > > -- > 2.34.1 > > _______________________________________________ > Virtualization mailing list > Virtualization at lists.linux-foundation.org > https://lists.linuxfoundation.org/mailman/listinfo/virtualization
Yuri Benditovich
2022-Jan-26 08:32 UTC
[RFC PATCH 0/5] TUN/VirtioNet USO features support.
On Wed, Jan 26, 2022 at 9:54 AM Xuan Zhuo <xuanzhuo at linux.alibaba.com> wrote:> > On Tue, 25 Jan 2022 10:46:57 +0200, Andrew Melnychenko <andrew at daynix.com> wrote: > > Added new offloads for TUN devices TUN_F_USO4 and TUN_F_USO6. > > Technically they enable NETIF_F_GSO_UDP_L4 > > (and only if USO4 & USO6 are set simultaneously). > > It allows to transmission of large UDP packets. > > > > Different features USO4 and USO6 are required for qemu where Windows guests can > > enable disable USO receives for IPv4 and IPv6 separately. > > On the other side, Linux can't really differentiate USO4 and USO6, for now. > > For now, to enable USO for TUN it requires enabling USO4 and USO6 together. > > In the future, there would be a mechanism to control UDP_L4 GSO separately. > > > > Test it WIP Qemu https://github.com/daynix/qemu/tree/Dev_USOv2 > > > > New types for VirtioNet already on mailing: > > https://lists.oasis-open.org/archives/virtio-comment/202110/msg00010.html > > Seems like this hasn't been upvoted yet. > > https://github.com/oasis-tcs/virtio-spec#use-of-github-issuesYes, correct. This is a reason why this series of patches is RFC.> > Thanks. > > > > > Also, there is a known issue with transmitting packages between two guests. > > Without hacks with skb's GSO - packages are still segmented on the host's postrouting. > > > > Andrew Melnychenko (5): > > uapi/linux/if_tun.h: Added new ioctl for tun/tap. > > driver/net/tun: Added features for USO. > > uapi/linux/virtio_net.h: Added USO types. > > linux/virtio_net.h: Added Support for GSO_UDP_L4 offload. > > drivers/net/virtio_net.c: Added USO support. > > > > drivers/net/tap.c | 18 ++++++++++++++++-- > > drivers/net/tun.c | 15 ++++++++++++++- > > drivers/net/virtio_net.c | 22 ++++++++++++++++++---- > > include/linux/virtio_net.h | 11 +++++++++++ > > include/uapi/linux/if_tun.h | 3 +++ > > include/uapi/linux/virtio_net.h | 4 ++++ > > 6 files changed, 66 insertions(+), 7 deletions(-) > > > > -- > > 2.34.1 > > > > _______________________________________________ > > Virtualization mailing list > > Virtualization at lists.linux-foundation.org > > https://lists.linuxfoundation.org/mailman/listinfo/virtualization
Andrew Melnichenko
2022-Feb-08 13:09 UTC
[RFC PATCH 0/5] TUN/VirtioNet USO features support.
Hi people, Can you please review this series? On Wed, Jan 26, 2022 at 10:32 AM Yuri Benditovich <yuri.benditovich at daynix.com> wrote:> > On Wed, Jan 26, 2022 at 9:54 AM Xuan Zhuo <xuanzhuo at linux.alibaba.com> wrote: > > > > On Tue, 25 Jan 2022 10:46:57 +0200, Andrew Melnychenko <andrew at daynix.com> wrote: > > > Added new offloads for TUN devices TUN_F_USO4 and TUN_F_USO6. > > > Technically they enable NETIF_F_GSO_UDP_L4 > > > (and only if USO4 & USO6 are set simultaneously). > > > It allows to transmission of large UDP packets. > > > > > > Different features USO4 and USO6 are required for qemu where Windows guests can > > > enable disable USO receives for IPv4 and IPv6 separately. > > > On the other side, Linux can't really differentiate USO4 and USO6, for now. > > > For now, to enable USO for TUN it requires enabling USO4 and USO6 together. > > > In the future, there would be a mechanism to control UDP_L4 GSO separately. > > > > > > Test it WIP Qemu https://github.com/daynix/qemu/tree/Dev_USOv2 > > > > > > New types for VirtioNet already on mailing: > > > https://lists.oasis-open.org/archives/virtio-comment/202110/msg00010.html > > > > Seems like this hasn't been upvoted yet. > > > > https://github.com/oasis-tcs/virtio-spec#use-of-github-issues > > Yes, correct. This is a reason why this series of patches is RFC. > > > > > Thanks. > > > > > > > > Also, there is a known issue with transmitting packages between two guests. > > > Without hacks with skb's GSO - packages are still segmented on the host's postrouting. > > > > > > Andrew Melnychenko (5): > > > uapi/linux/if_tun.h: Added new ioctl for tun/tap. > > > driver/net/tun: Added features for USO. > > > uapi/linux/virtio_net.h: Added USO types. > > > linux/virtio_net.h: Added Support for GSO_UDP_L4 offload. > > > drivers/net/virtio_net.c: Added USO support. > > > > > > drivers/net/tap.c | 18 ++++++++++++++++-- > > > drivers/net/tun.c | 15 ++++++++++++++- > > > drivers/net/virtio_net.c | 22 ++++++++++++++++++---- > > > include/linux/virtio_net.h | 11 +++++++++++ > > > include/uapi/linux/if_tun.h | 3 +++ > > > include/uapi/linux/virtio_net.h | 4 ++++ > > > 6 files changed, 66 insertions(+), 7 deletions(-) > > > > > > -- > > > 2.34.1 > > > > > > _______________________________________________ > > > Virtualization mailing list > > > Virtualization at lists.linux-foundation.org > > > https://lists.linuxfoundation.org/mailman/listinfo/virtualization