Re: [Xen-users] GPLPV and dhcp should it work?

[Silviu Paragina <silviu@xxxxxxxxxxx>]

I was sure I forgot something :">

There is no physical interface, I use a stripped down network-bridge 
that doesn't add any physical interface to the bridge. I have attached 
it here. The vif script is the standard bridge one.
Also I have tried gplpv from this packages: 
"gplpv_chk_wlh_x86_0.10.0.83.msi" and "gplpv_chk_wlh_x86_0.10.0.86.msi"

Silviu


Pasi Kärkkäinen wrote:
> On Mon, Sep 14, 2009 at 06:08:50PM +0300, Silviu Paragina wrote:
>   
> > My problem:
> > I have
> > - a xen ubuntu 9.04 with xen from the repository (3.3.0 with some 
> > patches) and the debian kernel
> > - windows 2008 server guest with the attached config
> > - dhcp3 server with the attached config
> >
> > If I leave everything as is (without gplpv) everything works great.
> > If I install gplpv and remove type=ioemu from the config the machine can 
> > not get the ip, but if I manually set the ip address it works fine.
> > On the dhcp server side I get "dhcpd: 5 bad udp checksums in 5 packets"
> >
> >     
> What's the physical NIC you have? 
>
> Please run "ethtool -i peth0" in dom0.
>
> Also check the offloading settings in dom0 for the NIC:
> "ethtool -k peth0"
>
> -- Pasi
>
>   
> > I have tried Checksum offloading from properties on the xen network 
> > device with no luck. I shall try again anyhow (I might have missed 
> > something, because I had other issues with xen at the time).
> > Also on another note the iso image, attached as a cdrom, vanishes after 
> > I install the drivers, but this doesn't matter much.
> > Searching with google I have found a few sites some that say this is 
> > solved, some that say to disable Checksum offloading, but all sites I 
> > have found refer to the 0.9.x version of the drivers, so I'm not sure of 
> > anything. Is this how they are supposed to act?
> >
> >
> > Silviu
> >     
>   
> > ddns-update-style none;
> > default-lease-time 600;
> > max-lease-time 600;
> > log-facility daemon;
> >
> >
> > #dhcpd.conf part
> >
> >
> > subnet X.X.0.0 netmask 255.255.0.0 {
> >         range X.X.1.0 X.X.1.255;
> >         option domain-name-servers X.X.X.X, X.X.X.X;
> >         #option domain-name "internal.example.org";
> >         option routers X.X.0.1;
> >         #option broadcast-address X.X.255.255;
> >         #default-lease-time 600;
> >         #max-lease-time 7200;
> > 	host w2008 
> > 	{
> >                 hardware ethernet 00:16:3E:XX:XX:XX;
> >                 fixed-address X.X.0.3;
> >         }
> > }
> >
> >
> >     
>   
> > import os, re
> > arch = os.uname()[4]
> > if re.search('64', arch):
> >     arch_libdir = 'lib64'
> > else:
> >     arch_libdir = 'lib'
> >
> > kernel = "/usr/lib/xen/boot/hvmloader"
> > builder='hvm'
> > memory = 1000
> >
> > # Should be at least 2KB per MB of domain memory, plus a few MB per vcpu.
> > shadow_memory = 32
> > name = "w2008"
> > vif = [ 'mac=00:16:3E:XX:XX:XX,type=ioemu,bridge=xenbr,vifname=w2008' ]
> > localtime = 1
> > dhcp = 'dhcp'
> > acpi = 1
> > apic = 1
> > disk = [ 'file:/var/lib/images/xenwin2008.img,hda,w', 
> > 'file:/var/lib/images/windows2008x86.iso,hdc:cdrom,r' ]
> > vcpus = 2
> > #cpu = 1
> > #cpus = 1
> > device_model = '/usr/' + arch_libdir + '/xen/bin/qemu-dm'
> >
> > #-----------------------------------------------------------------------------
> > # boot on floppy (a), hard disk (c) or CD-ROM (d) 
> > # default: hard disk, cd-rom, floppy
> > boot="dc"
> > sdl=0
> > vnc=1
> > vncconsole=1
> > vncpasswd=''
> >
> > serial='pty'
> > usbdevice='tablet'
> >
> >     
>   
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users
> >     
> _______________________________________________
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> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users
>   

#!/bin/bash
#============================================================================
# Default Xen network start/stop script.
# Xend calls a network script when it starts.
# The script name to use is defined in /etc/xen/xend-config.sxp
# in the network-script field.
#
# This script creates a bridge (default ${netdev}), adds a device
# (defaults to the device on the default gateway route) to it, copies
# the IP addresses from the device to the bridge and adjusts the routes
# accordingly.
#
# If all goes well, this should ensure that networking stays up.
# However, some configurations are upset by this, especially
# NFS roots. If the bridged setup does not meet your needs,
# configure a different script, for example using routing instead.
#
# Usage:
#
# network-bridge (start|stop|status) {VAR=VAL}*
#
# Vars:
#
# bridge     The bridge to use (default ${netdev}).
# netdev     The interface to add to the bridge (default gateway device).
# antispoof  Whether to use iptables to prevent spoofing (default no).
#
# Internal Vars:
# pdev="p${netdev}"
# tdev=tmpbridge
#
# start:
# Creates the bridge as tdev
# Copies the IP and MAC addresses from pdev to bridge
# Renames netdev to be pdev 
# Renames tdev to bridge
# Enslaves pdev to bridge
#
# stop:
# Removes pdev from the bridge
# Transfers addresses, routes from bridge to pdev
# Renames bridge to tdev
# Renames pdev to netdev 
# Deletes tdev
#
# status:
# Print addresses, interfaces, routes
#
#============================================================================


dir=$(dirname "$0")
. "$dir/xen-script-common.sh"
. "$dir/xen-network-common.sh"

findCommand "$@"
evalVariables "$@"

bridge=${bridge:-xenbr}
antispoof=${antispoof:-no}


   
do_ifup() {
    if ! ifup $1 ; then
        logger -t xen "Couldn't bring $1 up"
    fi
}

##
# link_exists interface
#
# Returns 0 if the interface named exists (whether up or down), 1 otherwise.
#
link_exists()
{
    if ip link show "$1" >/dev/null 2>/dev/null
    then
        return 0
    else
        return 1
    fi
}

# Set the default forwarding policy for $dev to drop.
# Allow forwarding to the bridge.
antispoofing () {
    iptables -P FORWARD DROP
    iptables -F FORWARD
    iptables -A FORWARD -m physdev --physdev-in ${pdev} -j ACCEPT
}

# Usage: show_status dev bridge
# Print ifconfig and routes.
show_status () {
    local bridge=$1
    
    echo '============================================================'
    ip addr show ${bridge}
    echo ' '
    brctl show ${bridge}
    echo ' '
    ip route list
    echo ' '
    route -n
    echo '============================================================'
}

op_start () {
    if [ "${bridge}" = "null" ] ; then
        return
    fi

    if link_exists "${bridge}"; then
        # The device is already up.
        return
    fi

    create_bridge ${bridge}

    do_ifup ${bridge}

    if [ ${antispoof} = 'yes' ] ; then
        antispoofing
    fi
}

op_stop () {
    if [ "${bridge}" = "null" ]; then
        return
    fi
    if ! link_exists "$bridge"; then
        return
    fi

    brctl delbr ${tdev}
}

case "$command" in
    start)
        op_start
        ;;
    
    stop)
        op_stop
        ;;

    status)
        show_status ${bridge}
        ;;

    *)
        echo "Unknown command: $command" >&2
        echo 'Valid commands are: start, stop, status' >&2
        exit 1
esac

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