[Xen-API] eth0 on hvm is not up on xen 4.0.1

[姜晓东 <jxd431@xxxxxxxxx>]

Hi,all.

I create a hvm which boot up from gentoo livecd iso file, the config file 'xen/configs/gentoo' is as follows:
------------------------------
#  -*- mode: python; -*-
import os, re
arch_libdir = 'lib'
arch = os.uname()[4]
if os.uname()[0] == 'Linux' and re.search('64', arch):
    arch_libdir = 'lib64'
kernel = "/usr/lib/xen/boot/hvmloader"
builder='hvm'
memory = 2048
shadow_memory = 8
name = "centos"
vcpus=1
vif = [ 'type=ioemu, mac=00:16:3e:00:00:12, bridge=xenbr0' ]
disk = [ 'phy:/dev/sda6,sda,w','file:/root/downloads/install-amd64-minimal-20110113.iso,hdc:cdrom,r' ]
cdrom = 'dev/hdc'
device_model = '/usr/' + arch_libdir + '/xen/bin/qemu-dm'
boot="dc"
sdl=0
opengl=0
vnc=1
vnclisten="0.0.0.0"
vncpasswd=''
vncconsole=1
stdvga=0
serial='pty'
usbdevice='tablet'
------------------------------

Then i create this vm using command:
xm create /xen/configs/gentoo


When i entered into the console of this vm, I cannot see eth0 using ifconfig command but only see lo interface is up

The tail of /var/log/messages on dom0 is as following:
-----------------------------------------------
Feb 18 22:50:20 server kernel: device tap1.0 entered promiscuous mode
Feb 18 22:50:20 server kernel: eth0: port 3(tap1.0) entering forwarding state
Feb 18 22:50:21 server logger: /etc/xen/scripts/block: Writing backend/vbd/1/5632/node /dev/loop0 to xenstore.
Feb 18 22:50:21 server logger: /etc/xen/scripts/block: Writing backend/vbd/1/5632/physical-device 7:0 to xenstore.
Feb 18 22:50:21 server kernel: (cdrom_add_media_watch() file=/usr/src/linux-2.6.34-xen-r4/drivers/xen/blkback/cdrom.c, line=108) nodename:backend/vbd/1/5632
Feb 18 22:50:21 server kernel: (cdrom_is_type() file=/usr/src/linux-2.6.34-xen-r4/drivers/xen/blkback/cdrom.c, line=95) type:1
Feb 18 22:50:21 server kernel: (cdrom_add_media_watch() file=/usr/src/linux-2.6.34-xen-r4/drivers/xen/blkback/cdrom.c, line=110) is a cdrom
Feb 18 22:50:21 server kernel: (cdrom_add_media_watch() file=/usr/src/linux-2.6.34-xen-r4/drivers/xen/blkback/cdrom.c, line=112) xenstore wrote OK
Feb 18 22:50:21 server kernel: (cdrom_is_type() file=/usr/src/linux-2.6.34-xen-r4/drivers/xen/blkback/cdrom.c, line=95) type:1
Feb 18 22:50:21 server logger: /etc/xen/scripts/block: Writing backend/vbd/1/5632/hotplug-status connected to xenstore.
Feb 18 22:50:36 server kernel: eth0: port 3(tap1.0) entering disabled state
Feb 18 22:50:36 server kernel: device tap1.0 left promiscuous mode
Feb 18 22:50:36 server kernel: eth0: port 3(tap1.0) entering disabled state
Feb 18 22:51:32 server kernel: blkback: ring-ref 8, event-channel 5, protocol 1 (x86_64-abi)
Feb 18 22:51:32 server logger: /etc/xen/scripts/vif-bridge: offline XENBUS_PATH=backend/vif/1/0
Feb 18 22:51:32 server kernel: eth0: port 2(vif1.0) entering disabled state
Feb 18 22:51:32 server kernel: eth0: port 2(vif1.0) entering disabled state
Feb 18 22:51:32 server logger: /etc/xen/scripts/vif-bridge: brctl delif eth0 vif1.0 failed
Feb 18 22:51:32 server logger: /etc/xen/scripts/vif-bridge: ifconfig vif1.0 down failed
Feb 18 22:51:32 server logger: /etc/xen/scripts/vif-bridge: Successful vif-bridge offline for vif1.0, bridge eth0.
-----------------------------------------------

When i booting hvm, i can see tap1.0 and vif 1.0 is up but then they disappeared while booting finished
------------------------------------------------
server log # ifconfig
eth0      Link encap:Ethernet  HWaddr 00:25:90:08:c3:8a 
          inet addr:192.168.1.3  Bcast:192.168.255.255  Mask:255.255.0.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:4272 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3743 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:322797 (315.2 KiB)  TX bytes:906019 (884.7 KiB)

lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

peth0     Link encap:Ethernet  HWaddr 00:25:90:08:c3:8a 
          UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
          RX packets:4278 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3747 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:382965 (373.9 KiB)  TX bytes:906161 (884.9 KiB)
          Memory:fbce0000-fbd00000

ppp0      Link encap:Point-to-Point Protocol 
          inet addr:222.129.49.152  P-t-P:222.129.48.1  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1492  Metric:1
          RX packets:3261 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2736 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3
          RX bytes:249113 (243.2 KiB)  TX bytes:815361 (796.2 KiB)

vif1.0    Link encap:Ethernet  HWaddr fe:ff:ff:ff:ff:ff 
          UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:32
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
---------------------------------------------------------

While booting finished, the brctl shows as following:
-----------------------------------------------------------
server log # brctl show
bridge name    bridge id        STP enabled    interfaces
eth0        8000.00259008c38a    no        peth0
----------------------------------------------------------


I tried to change vif type to netfront, eth0 interface is up after booting from gentoo livecd. I don't understand why xen failed to load eth0 using 'type=ioemu'?

Anyone help me?

-- 
Xiaodong Jiang
jxd431@xxxxxxxxx

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