similar to: UDP checksums broken in Dom0 -> DomU vif transfer

Hello I use XEN 3.0 in debian sarge. I have a domU1 for routing and firewall. This domU1 use 2 network interfaces which is on a bridge ''gate'' and the other on bridge ''lan''. dumU2 use one interface (eth0) on bridge ''lan''. Then I make a ping out of domU2 to www.debian.de so I get no answer. The name isn''t resolved. A ping to IP of

Now that we have SCTP offload capabilities in the kernel, we can add them to virtio as well. First step is SCTP checksum. We need a new freature in virtio to negotiate this support since SCTP is excluded with the stardard checksum and requires a little bit extra. This series proposes VIRTIO_NET_F_SCTP_CSUM feature bit. As the "little bit extra", the kernel uses a new bit in the skb

Now that we have SCTP offload capabilities in the kernel, we can add them to virtio as well. First step is SCTP checksum. We need a new freature in virtio to negotiate this support since SCTP is excluded with the stardard checksum and requires a little bit extra. This series proposes VIRTIO_NET_F_SCTP_CSUM feature bit. As the "little bit extra", the kernel uses a new bit in the skb

Userspace virtio server has the following hack so guests rely on it, and we have to replicate it, too: Use port number to detect incoming IPv4 DHCP response packets, and fill in the checksum for these. The issue we are solving is that on linux guests, some apps that use recvmsg with AF_PACKET sockets, don't know how to handle CHECKSUM_PARTIAL; The interface to return the relevant information

Userspace virtio server has the following hack so guests rely on it, and we have to replicate it, too: Use port number to detect incoming IPv4 DHCP response packets, and fill in the checksum for these. The issue we are solving is that on linux guests, some apps that use recvmsg with AF_PACKET sockets, don't know how to handle CHECKSUM_PARTIAL; The interface to return the relevant information

On Wed, May 02, 2018 at 09:27:00AM -0400, Vlad Yasevich wrote: > On 05/01/2018 11:24 PM, Michael S. Tsirkin wrote: > > On Tue, May 01, 2018 at 10:07:38PM -0400, Vladislav Yasevich wrote: > >> Since we now have support for software CRC32c offload, turn it on > >> for macvlan and macvtap devices so that guests can take advantage > >> of offload SCTP checksums to

On Wed, May 02, 2018 at 09:27:00AM -0400, Vlad Yasevich wrote: > On 05/01/2018 11:24 PM, Michael S. Tsirkin wrote: > > On Tue, May 01, 2018 at 10:07:38PM -0400, Vladislav Yasevich wrote: > >> Since we now have support for software CRC32c offload, turn it on > >> for macvlan and macvtap devices so that guests can take advantage > >> of offload SCTP checksums to

Sorry for the cross-post, but this could be either lists problem. I have 2 boxes running 7-STABLE as of 20081130, both i386 SMP. One is running ISC DHCPD 3.0.x from recent ports, and the other dhclient from make world. The server is refusing to answer the DISCOVER request, as it thinks the IP checksum is wrong, which tcpdump also confirms. Other DHCP clients are working fine on this network,

Now that we have SCTP offload capabilities in the kernel, we can add them to virtio as well. First step is SCTP checksum. We need a new freature in virtio to negotiate this support since SCTP is excluded with the stardard checksum and requires a little bit extra. This series proposes VIRTIO_NET_F_SCTP_CSUM feature bit. As the "little bit extra", the kernel uses a new bit in the skb

Commits: fd2a0437dc33 virtio_net: introduce virtio_net_hdr_{from,to}_skb e858fae2b0b8 virtio_net: use common code for virtio_net_hdr and skb GSO conversion introduced a subtle (but unexplained) difference in how virtio_net flags are derived from skb->ip_summed fields on transmit from the guest to the host/backend. Prior to the patches the flags would be set to VIRTIO_NET_HDR_F_NEEDS_CSUM if

Commits: fd2a0437dc33 virtio_net: introduce virtio_net_hdr_{from,to}_skb e858fae2b0b8 virtio_net: use common code for virtio_net_hdr and skb GSO conversion introduced a subtle (but unexplained) difference in how virtio_net flags are derived from skb->ip_summed fields on transmit from the guest to the host/backend. Prior to the patches the flags would be set to VIRTIO_NET_HDR_F_NEEDS_CSUM if

Could the problem be that the e100 can do IP receive checksumming on the board, but the eepro driver doesn't enable it. When the board is doing checksum offload, then the csum field isn't set. Please try disabling receive checksumming on the e100 driver modprobe e100 XsumRX=0 If this is the problem, it exists both 2.4 and 2.6. On Wed, 27 Aug 2003 18:24:57 +0200 Hannes Schulz

On Wed, May 02, 2018 at 10:00:14AM -0400, Vlad Yasevich wrote: > On 05/02/2018 09:46 AM, Michael S. Tsirkin wrote: > > On Wed, May 02, 2018 at 09:27:00AM -0400, Vlad Yasevich wrote: > >> On 05/01/2018 11:24 PM, Michael S. Tsirkin wrote: > >>> On Tue, May 01, 2018 at 10:07:38PM -0400, Vladislav Yasevich wrote: > >>>> Since we now have support for

On Tue, May 01, 2018 at 10:07:38PM -0400, Vladislav Yasevich wrote: > Since we now have support for software CRC32c offload, turn it on > for macvlan and macvtap devices so that guests can take advantage > of offload SCTP checksums to the host or host hardware. > > Signed-off-by: Vladislav Yasevich <vyasevic at redhat.com> > --- > drivers/net/macvlan.c | 5 +++-- >

On Tue, May 01, 2018 at 10:07:38PM -0400, Vladislav Yasevich wrote: > Since we now have support for software CRC32c offload, turn it on > for macvlan and macvtap devices so that guests can take advantage > of offload SCTP checksums to the host or host hardware. > > Signed-off-by: Vladislav Yasevich <vyasevic at redhat.com> > --- > drivers/net/macvlan.c | 5 +++-- >

Another checksum offload problem was reported on xen-users, when using a domU as a firewall: http://lists.xensource.com/archives/html/xen-users/2006-04/msg01150.html It also fails without VLANs. The path from dom0->domU with ip_summed==CHECKSUM_HW/proto_csum_blank==1 is broken. - skb_checksum_setup() assumes that a checksum will definitely be calculated in dev_queue_xmit(), but the

On Tue, Dec 03, 2013 at 01:00:23PM +0000, Balraj Singh wrote: > Hi, > > I''m working on verifying TCP checksums on incoming packets in Mirage, but > I''ve run into a bit of a problem. > > If TCP checksum offload is turned on on a virtual interface (this is the > default), and if the TCP connection is local to the machine, it looks like > Xen does not

I''m at my wits end maybe someone out there can help me. Machine Shuttle AN51R Motherboard 1GB ram AMD-64 3000+ (2GHz) 20GB HD (western digital) with 1GB for minimal install, 500MB for swap, and the rest I had planned to use for LVM volumes for VMs. I''ve been running ubuntu 5.04 (hoary) happy as a clam for a while now no problems. Now I''ve started investigating Xen

I am running a Xen HVM guest with netfront PV drivers. This is running SLES10 SP3 inside the guest. The Dom0 is also SLES10 SP3. Now I am trying to communicate from that HVM guest to a Windows Visa or also Windows 7 machine and I am getting really poor TCP performance. When tracing on the network traffic, I can see that no packets are dropped or missing or anything, but what happens is that the

Package: xen-utils-4.2 Version: 4.2.0-1 Severity: normal Hello, I tried running a xen domain but it complains about missing file not in current xen-utils: libxl: error: libxl_dm.c:1086:libxl__spawn_local_dm: device model /usr/lib/xen-4.2/bin/qemu-dm is not executable: No such file or director $ apt-file search qemu-dm xcp-xapi: /usr/lib/xcp/lib/qemu-dm-wrapper xen-utils-4.1: