Re: [Qemu-devel] [PATCH v4 0/9] VMXNET3 paravirtual NIC device implementation

[Gerhard Wiesinger]

Hello Dmitry,

Tried it also on qemu, without success. Same behavior.

I sniffed also with tcpdump:
ICMP traffic is dumped immediately but TCP traffic not. Looks like a TCP 
problem.

For config and other details see below.

Ciao,
Gerhard

On 21.03.2012 07:59, Gerhard Wiesinger wrote:
> On 20.03.2012 09:00, Dmitry Fleytman wrote:
> > Hello, Gerhard
> >
> > I've tested telnet connections on Knoppix running on QEMU-KVM with 
> > patch V5.
> > Everything works fine on my setup.
> > What is your network setup? How do you connect tap1 interface to the
> > outer world?
>
> Hello Dmitry ,
>
> Did you also test with tap?
>
> As patch V2 (i think it was that version) worked well but was not 
> stable I'm guessing that there might be some other problems:
> 1.) tap interface?
> 2.) TCP offload checksumming (as far as I saw I think there were some 
> changes).
>
> Same command line with pcnet is also ok (changed only interface card). 
> My network setup for testing several adapters is stable since about 
> one year.
> /root/download/qemu/git/qemu-kvm/x86_64-softmmu/qemu-system-x86_64
> -drive 
> if=ide,index=3,media=cdrom,file=ISO/KNOPPIX_V6.7.1CD-2011-09-14-DE.iso
> -boot order=cad,menu=on -m 2048 -k de -vga vmware -vnc :0
> -bios /root/download/seabios/git/seabios/out/bios.bin
> -chardev stdio,id=seabios -device 
> isa-debugcon,iobase=0x402,chardev=seabios
> -device pcnet,mac=1a:46:0b:ca:bc:7e,vlan=1,romfile=
> -net tap,ifname=tap1,script=no,downscript=no,vlan=1
>
>
> I use a bridge on eth0 and connect the tap interfaces:
> brctl  show
> bridge name     bridge id               STP enabled     interfaces
> br0             8000.001fc689da45       no              eth0
>                                                         tap0
>                                                         tap1
>
>
> > Also, since you have ping failure to init MSI-X is not related to the
> > problem - device just falls back to MSI interrupts,
> > but anyway, why does it fail? Could it be some QEMU/KVM versions
> > incompartibility?
>
> Don't know why it fails. I'm using latest git QEMU/KVM version.
>
> Will try it on qemu only today in the evening.
>
> Thnx.
>
> Ciao,
> Gerhard
> > Best regards,
> > Dmitry Fleytman.
> >
> > On Mon, Mar 19, 2012 at 9:24 PM, Gerhard 
> > Wiesinger<address@hidden>  wrote:
> > > Hello Dmitry,
> > >
> > > Tried also v5 patch without success:
> > > /root/download/qemu/git/qemu-kvm/x86_64-softmmu/qemu-system-x86_64
> > > -drive
> > > if=ide,index=3,media=cdrom,file=ISO/KNOPPIX_V6.7.1CD-2011-09-14-DE.iso
> > > -boot order=cad,menu=on
> > > -m 2048 -k de -vga vmware -vnc :0
> > > -bios /root/download/seabios/git/seabios/out/bios.bin
> > > -chardev stdio,id=seabios -device 
> > > isa-debugcon,iobase=0x402,chardev=seabios
> > > -device vmxnet3,mac=1a:46:0b:ca:bc:7e,vlan=1,romfile=
> > > -net tap,ifname=tap1,script=no,downscript=no,vlan=1
> > >
> > > ping ok, but outside tcp communication fails:
> > > # timeout Knoppix =>  outside
> > > telnet 192.168.0.2 22
> > > # timeout outside =>  Knoppix  failes
> > > telnet 192.168.0.30 22
> > >
> > > RTL8139 with same command line is ok.
> > >
> > > Maybe that helps directly at startup:
> > > kvm_msix_vector_add: kvm_add_msix failed: No space left on device
> > > [vmxnet3][WR][vmxnet3_use_msix_vectors]: Failed to use MSI-X vector 
> > > 9, error
> > > -28
> > > [vmxnet3][WR][vmxnet3_init_msix]: Failed to use MSI-X vectors, error 0
> > > [vmxnet3][WR][vmxnet3_pci_init]: Failed to initialize MSI-X, 
> > > configuration
> > > is inconsistent.
> > > [vmxnet3][WR][vmxnet3_peer_has_vnet_hdr]: Peer has no virtio 
> > > extension. Task
> > > offloads will be emulated.
> > >
> > > I'm using git qemu-kvm and not git qemu.
> > >
> > > Thnx.
> > >
> > > Ciao,
> > > Gerhard
> > >
> > >
> > > On 18.03.2012 16:30, Dmitry Fleytman wrote:
> > > > Hello, Gerhard
> > > >
> > > > I've rechecked SSH connection both incoming and outgoing with patch 
> > > > v5.
> > > > Everything works fine.
> > > > If you still see problems, please, provide your exact configuration.
> > > >
> > > > Thanking you for your support,
> > > > Dmitry Fleytman.
> > > >
> > > >
> > > > On Sun, Mar 18, 2012 at 10:29 AM, Gerhard Wiesinger
> > > > <address@hidden>    wrote:
> > > > > Hello,
> > > > >
> > > > > I'm still having problems with v4 patch: ping works well, even 
> > > > > with large
> > > > > packet sizes but ssh doesn't work at all.
> > > > > Tested with Knoppix 6.7 and Fedora 16.
> > > > >
> > > > > Thnx.
> > > > >
> > > > > Ciao,
> > > > > Gerhard
> > > > >
> > > > >
> > > > > On 15.03.2012 22:08, Dmitry Fleytman wrote:
> > > > > > This set of patches implements VMWare VMXNET3 paravirtual NIC 
> > > > > > device.
> > > > > > The device supports of all the device features including offload
> > > > > > capabilties,
> > > > > > VLANs and etc.
> > > > > > The device is tested on different OSes:
> > > > > >      Fedora 15
> > > > > >      Ubuntu 10.4
> > > > > >      Centos 6.2
> > > > > >      Windows 2008R2
> > > > > >      Windows 2008 64bit
> > > > > >      Windows 2008 32bit
> > > > > >      Windows 2003 64bit
> > > > > >      Windows 2003 32bit
> > > > > >
> > > > > > Changes in V4:
> > > > > >     Fixed a few problems uncovered by NETIO test suit
> > > > > >     Assertion on failure to initialize MSI/MSI-X replaced with 
> > > > > > warning
> > > > > >     message and fallback to Legacy/MSI respectively
> > > > > >
> > > > > >       Reported-by: Gerhard Wiesinger<address@hidden>
> > > > > >
> > > > > >     Various coding style adjustments and patch split-up as 
> > > > > > suggested by
> > > > > > Anthony Liguori
> > > > > >
> > > > > >       Reported-by: Anthony Liguori<address@hidden>
> > > > > >
> > > > > >     Live migration support added
> > > > > >
> > > > > > Changes in V3:
> > > > > >     Fixed crash when net device that is used as network fronted 
> > > > > > has no
> > > > > >     virtio HDR support.
> > > > > >     Task offloads emulation for cases when net device that is 
> > > > > > used as
> > > > > >     network fronted has no virtio HDR support.
> > > > > >
> > > > > >       Reported-by: Gerhard Wiesinger<address@hidden>
> > > > > >
> > > > > > Changes in V2:
> > > > > >     License text changed accoring to community suggestions
> > > > > >     Standard license header from GPLv2+ - licensed QEMU files used
> > > > > >
> > > > > > Dmitry Fleytman (9):
> > > > > >    Adding missing flag VIRTIO_NET_HDR_F_DATA_VALID from Linux kernel
> > > > > >      source tre     Reformatting comments according to checkpatch.pl
> > > > > >      requirements
> > > > > >    Adding utility function net_checksum_add_cont() that allows 
> > > > > > checksum
> > > > > >         calculation of scattered data with odd chunk sizes
> > > > > >    Adding utility function iov_net_csum_add() for iovec checksum
> > > > > >      calculation
> > > > > >    MSI-X state save/load invocations moved to PCI Device save/load
> > > > > >      callbacks     to avoid code duplication in MSI-X-enabled 
> > > > > > devices
> > > > > >      that support live migration
> > > > > >    Header with various utility functions shared by VMWARE SCSI and
> > > > > >      network devi
> > > > > >    Various utility functions used by VMWARE network devices
> > > > > >    Packet abstraction used by VMWARE network devices
> > > > > >    VMXNET3 paravirtual device implementation
> > > > > >    VMXNET3 paravirtualized device integration.     Interface type
> > > > > >      "vmxnet3" added.
> > > > > >
> > > > > >   Makefile.objs           |    1 +
> > > > > >   default-configs/pci.mak |    1 +
> > > > > >   hw/pci.c                |    7 +
> > > > > >   hw/pci.h                |    1 +
> > > > > >   hw/virtio-net.h         |   13 +-
> > > > > >   hw/virtio-pci.c         |    2 -
> > > > > >   hw/vmware_utils.h       |  122 +++
> > > > > >   hw/vmxnet3.c            | 2435
> > > > > > +++++++++++++++++++++++++++++++++++++++++++++++
> > > > > >   hw/vmxnet3.h            |  757 +++++++++++++++
> > > > > >   hw/vmxnet_debug.h       |  121 +++
> > > > > >   hw/vmxnet_pkt.c         | 1243 ++++++++++++++++++++++++
> > > > > >   hw/vmxnet_pkt.h         |  479 ++++++++++
> > > > > >   hw/vmxnet_utils.c       |  165 ++++
> > > > > >   hw/vmxnet_utils.h       |  320 +++++++
> > > > > >   iov.c                   |   29 +
> > > > > >   iov.h                   |    3 +
> > > > > >   net.c                   |    2 +-
> > > > > >   net/checksum.c          |   13 +-
> > > > > >   net/checksum.h          |   14 +-
> > > > > >   19 files changed, 5712 insertions(+), 16 deletions(-)
> > > > > >   create mode 100644 hw/vmware_utils.h
> > > > > >   create mode 100644 hw/vmxnet3.c
> > > > > >   create mode 100644 hw/vmxnet3.h
> > > > > >   create mode 100644 hw/vmxnet_debug.h
> > > > > >   create mode 100644 hw/vmxnet_pkt.c
> > > > > >   create mode 100644 hw/vmxnet_pkt.h
> > > > > >   create mode 100644 hw/vmxnet_utils.c
> > > > > >   create mode 100644 hw/vmxnet_utils.h