[with libvirt/qemu git] invoking 'qemu-system-x86_64' fails w/: -netdev bridge, br=virbr0, id=hostnet0 Device 'bridge' could not be initialized"

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Hi,

I'm on latest master, w/ Eric's block-commit patches applied
===========================================================
[kashyap@moon libvirt-k]$ git status
# On branch master
# Your branch is ahead of 'origin/master' by 2 commits.
#
nothing to commit (working directory clean)
[kashyap@moon libvirt-k]$
===========================================================
[kashyap@moon libvirt-k]$ # ./autogen.sh ; make -j5 ; make check
===========================================================


Now, then define an xml [see complete xml at the bottom]
#-----------------------------------------------------------#
[kashyap@moon libvirt-k]$ ./run ./tools/virsh define /var/tmp/f17-base.xml
Domain f17-base defined from /var/tmp/f17-base.xml
#-----------------------------------------------------------#

Try to start the guest now:
#-----------------------------------------------------------#
[kashyap@moon libvirt-k]$ ./run ./tools/virsh start f17-base
error: Failed to start domain f17-base
error: internal error Process exited while reading console log output: char device
redirected to /dev/pts/6
failed to launch bridge helper
qemu-system-x86_64: -netdev bridge,br=virbr0,id=hostnet0: Device 'bridge' could not be
initialized

[kashyap@moon libvirt-k]$
#-----------------------------------------------------------#

The emulator is pointed to latest qemu-system-x86_64 compiled from latest qemu-git
#-----------------------------------------------------------#
[kashyap@moon libvirt-k]$ egrep -i 'emulator|bridge' /var/tmp/f17-base.xml
    <emulator>/home/kashyap/projects/qemu/x86_64-softmmu/qemu-system-x86_64</emulator>
    <interface type='bridge'>
      <source bridge='virbr0'/>
[kashyap@moon libvirt-k]$
#-----------------------------------------------------------#
[kashyap@moon libvirt-k]$ brctl show
bridge name     bridge id               STP enabled     interfaces
br0             8000.00215e6fb9f4       no              eth0
virbr0          8000.525400573710       yes             virbr0-nic
[kashyap@moon libvirt-k]$
#-----------------------------------------------------------#
[kashyap@moon libvirt-k]$ ./run ./tools/virsh version
Compiled against library: libvirt 0.10.2
Using library: libvirt 0.10.2
Using API: QEMU 0.10.2
Cannot extract running QEMU hypervisor version

[kashyap@moon libvirt-k]$
#-----------------------------------------------------------#
[kashyap@moon libvirt-k]$ ps -ef | grep libvirtd
kashyap   2277     1  2 17:07 ?        00:00:00
/home/kashyap/projects/libvirt-k/daemon/.libs/lt-libvirtd --timeout=30
kashyap   2392 11303  0 17:07 pts/15   00:00:00 grep --color=auto libvirtd
[kashyap@moon libvirt-k]$
#-----------------------------------------------------------#


That's what I see in the local log file:
#-----------------------------------------------------------#
[kashyap@moon libvirt-k]$ cat ~/.cache/libvirt/qemu/log/f17-base.log
2012-10-06 11:37:41.155+0000: starting up
LC_ALL=C LD_LIBRARY_PATH=/home/kashyap/projects/libvirt-k/src/.libs
PATH=/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/home/kashyap/.local/bin:/home/kashyap/bin:/home/kashyap/.local/bin:/home/kashyap/bin
HOME=/home/kashyap USER=kashyap LOGNAME=kashyap
/home/kashyap/projects/qemu/x86_64-softmmu/qemu-system-x86_64 -name f17-base -S -M pc-1.2
-enable-kvm -m 2048 -smp 2,sockets=2,cores=1,threads=1 -uuid
8d54ced1-2662-bcae-0804-d4a3e65e9ff6 -nographic -no-user-config -nodefaults -chardev
socket,id=charmonitor,path=/home/kashyap/.config/libvirt/qemu/lib/f17-base.monitor,server,nowait
-mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -device
piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive
file=/var/lib/libvirt/images/f17-base.qcow2,if=none,id=drive-virtio-disk0,format=qcow2,cache=none
-device
virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1
-netdev bridge,br=virbr0,id=hostnet0 -device
virtio-net-pci,netdev=hostnet0,id=net0,mac=52:51:00:a9:f1:7f,bus=pci.0,addr=0x3 -chardev
pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -device
usb-tablet,id=input0 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5
char device redirected to /dev/pts/6
failed to launch bridge helper
qemu-system-x86_64: -netdev bridge,br=virbr0,id=hostnet0: Device 'bridge' could not be
initialized
2012-10-06 11:37:41.281+0000: shutting down
[kashyap@moon libvirt-k]$
#-----------------------------------------------------------#


And that's the xml file:
#-----------------------------------------------------------#

<domain type='kvm'>
  <name>f17-base</name>
  <uuid>8d54ced1-2662-bcae-0804-d4a3e65e9ff6</uuid>
  <memory unit='KiB'>2097152</memory>
  <currentMemory unit='KiB'>2097152</currentMemory>
  <vcpu placement='static'>2</vcpu>
  <os>
    <type arch='x86_64' machine='pc-1.2'>hvm</type>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
    <apic/>
    <pae/>
  </features>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <devices>
    <emulator>/home/kashyap/projects/qemu/x86_64-softmmu/qemu-system-x86_64</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2' cache='none'/>
      <source file='/var/lib/libvirt/images/f17-base.qcow2'/>
      <target dev='vda' bus='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </disk>
    <controller type='usb' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
    </controller>
    <interface type='bridge'>
      <mac address='52:51:00:a9:f1:7f'/>
      <source bridge='br0'/>
      <model type='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </interface>
    <serial type='pty'>
      <target port='0'/>
    </serial>
    <console type='pty'>
      <target type='serial' port='0'/>
    </console>
    <input type='tablet' bus='usb'/>
    <memballoon model='virtio'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </memballoon>
  </devices>
</domain>
#-----------------------------------------------------------#


Other notes: Rich Jones suggested me to do a build dep for qemu & re-try
[kashyap@moon qemu]$ yum-builddep qemu
[kashyap@moon qemu]$  ./configure --target-list=x86_64-softmmu --disable-werror ; make -j5
 and re-configure qemu.

And still no dice, I see the same 'bridge' could not be initialized

Any hints here?

-- 
/kashyap

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