[Qemu-devel] [Bug 638955] Re: emulated netcards don't work with recent sunos kernel

[geppz]

Hi all,
I can confirm this bug,
on latest openindiana-148 and qemu-kvm 0.13.0 you cannot even ping the 
virtualization host.
With qemu-kvm-0.14.0 (just released!) you CAN ping the host: this is already an 
improvement.
HOWEVER 
biggest bug is still there: if you log in to the openindiana machine via ssh 
and do "dmesg" or "netstat" or some other command which ouptuts a lot of text, 
the tcp socket will hang (well say it hangs once every 3 attempts) forever.

Going with tcpdump -e from within the guest, I have identified that the problem 
is when a big enough packet is outputed.
I tried a few times with dmesg, and as soon as the tcp packet reaches the 
following length:

18:38:28.340097 52:54:69:b5:89:11 (oui Unknown) > 00:19:b9:81:2c:52 (oui
Unknown), ethertype IPv4 (0x0800), length 1514: 192.168.7.38.ssh >
192.168.7.52.59008: Flags [.], ack 2824, win 64436, options [nop,nop,TS
val 27488132 ecr 6063255], length 1448

it cannot get through. Then the IP stack tries and retries to send the
same identical packet, but there will never be any reply from the other
side. Finally the socket is torn down.

I have bridged networking for the VM. My bridge is a normal linux bridge br0 
with MTU 1500.
Has MTU anything to do with all this?
Is it a linux-bridge bug or a qemu-kvm bug?

Please fix this, solaris is important for its ZFS.
Thank you

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https://bugs.launchpad.net/bugs/638955

Title:
  emulated netcards don't work with recent sunos kernel

Status in QEMU:
  New

Bug description:
  hi there,

  i'm using qemu-kvm backend in version: # qemu-kvm -version
  QEMU PC emulator version 0.12.5 (qemu-kvm-0.12.5), Copyright (c) 2003-2008 
Fabrice Bellard

  and there are just *not working any of model=$type with combinations
  of recent sunos (solaris, openindiana, opensolaris, ..) ..

  you can download for testing purposes iso from here: http://dlc-
  origin.openindiana.org/isos/147/ or from here:
  http://genunix.org/distributions/indiana/ << osol and oi are also
  bubuntu-like *live cds, so no need to bother with installing

  behaviour is as follows:
  e1000 - receiving doesn't work, transmitting works .. dladm (tool for handle 
ethers) shows that is all ok, correct mode is loaded up, it just seems like 
this driver works at 100% but ..

  rtl8169|pcnet - works in 10Mbit mode with several other issues like
  high cpu utilization and so .. dladm is unable to recognize options
  for this kind of -nic

  others - just don't work

  .. i experienced this issue several times in past .. woraround was,
  that rtl8169 worked so-so .. with recent sunos kernel it doesn't.

  it's easy to reproduce, this is why i'm not putting here more then
  launching script for my virtual machine:

  # cat openindiana.sh
  qemu-kvm -hda /home/kvm/openindiana/openindiana.img -m 2048 -localtime -cdrom 
/home/kvm/+images/oi-dev-147-x86.iso -boot d \
  -vga std -vnc :9 -k en-us -monitor 
unix:/home/kvm/openindiana/instance,server,nowait \
  -net nic,model=e1000,vlan=1 -net tap,ifname=oi0,script=no,vlan=1 &

  sleep 2;
  ip l set oi0 up;
  ip a a 192.168.99.9/24 dev oi0;

  regards by daniel