dev/virtio stuff
Sean Bruno
seanbru at yahoo-inc.com
Tue Oct 30 00:00:53 UTC 2012
On Mon, 2012-10-29 at 16:58 -0700, Vincent Hoffman wrote:
> On 29/10/2012 21:49, Sean Bruno wrote:
> > So ... I see we have virtio nowish. I've started my hackery to make
> > some man(4) pages for this, but have some questions. Doing some raw
> > QEMU things, I can't quite see how to get the virtio blk and net devices
> > working.
> >
> > I've loaded the virtio drivers as modules. Is this not going to work in
> > this case? I don't see the virtio versions of disk devices in /dev so
> > I'm not sure what the problem here is.
> Modules work for me.
> [root at fbsd ~]# grep v /boot/loader.conf
> virtio_load="YES"
> virtio_pci_load="YES"
> virtio_blk_load="YES"
> if_vtnet_load="YES"
> virtio_balloon_load="YES"
>
> [root at fbsd ~]# mount
> /dev/vtbd0s1a on / (ufs, local)
> devfs on /dev (devfs, local, multilabel)
> /dev/vtbd0s1e on /tmp (ufs, local, soft-updates)
> /dev/vtbd0s1f on /usr (ufs, NFS exported, local, soft-updates)
> /dev/vtbd0s1d on /var (ufs, local, soft-updates)
> devfs on /var/named/dev (devfs, local, multilabel)
> [root at fbsd ~]# ifconfig vtnet0
> vtnet0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST>
> metric 0 mtu 1500
>
> options=c07bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWTSO,LINKSTATE>
> ether 54:52:00:2a:63:af
> inet 213.xxx.xxx.13 netmask 0xfffffc00 broadcast 213.xxx.xxx.255
> inet6 fe80::5652:ff:fe2a:63af%vtnet0 prefixlen 64 scopeid 0x1
> inet6 2001:470:xxx:xxx::1 prefixlen 64
> inet 10.10.24.1 netmask 0xffffff00 broadcast 10.10.24.255
> nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
> media: Ethernet 1000baseT <full-duplex>
> status: active
>
> [root at fbsd ~]# uname -a
> FreeBSD fbsd.bmk.namesco.net 10.0-CURRENT FreeBSD 10.0-CURRENT #33
> r241491M: Sat Oct 13 01:34:48 BST 2012
> toor at fbsd.bmk.namesco.net:/usr/obj/usr/src/sys/unsane-vm amd64
>
>
> Relevent bits in libvirt config (kvm running on centos5)
>
> <disk type='block' device='disk'>
> <driver name='qemu' type='raw'/>
> <source dev='/dev/vg_data/vm.unsane.co.uk'/>
> <target dev='vda' bus='virtio'/>
> <alias name='virtio0'/>
> <address type='drive' controller='0' bus='0' unit='0'/>
> </disk>
> <controller type='ide' index='0'>
> <address type='pci' domain='0x0000' bus='0x00' slot='0x01'
> function='0x1'/>
> </controller>
> <interface type='bridge'>
> <mac address='54:52:00:2a:63:af'/>
> <source bridge='br0'/>
> <target dev='vnet0'/>
> <model type='virtio'/>
> <address type='pci' domain='0x0000' bus='0x00' slot='0x03'
> function='0x0'/>
> </interface>
>
>
> Not sure if thats useful to you or not?
totally and very useful. thank you.
Sean
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