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

[Gerhard Wiesinger <lists@wiesinger.com>]

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<lists@wiesinger.com>  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
>>>> <gerhard@wiesinger.com>    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<lists@wiesinger.com>
>>>>>>
>>>>>>     Various coding style adjustments and patch split-up as 
>>>>>> suggested by
>>>>>> Anthony Liguori
>>>>>>
>>>>>>       Reported-by: Anthony Liguori<aliguori@us.ibm.com>
>>>>>>
>>>>>>     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<lists@wiesinger.com>
>>>>>>
>>>>>> 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
>>>>>>
>
>