Re: [Qemu-devel] virtio-9p is not working

[Cam Macdonell <cam@cs.ualberta.ca>]

On Wed, Jul 21, 2010 at 2:27 AM, Dallas Lee <mswplsdk@gmail.com> wrote:
> Hi,
> I have trying to use the virtio-9p for my linux in QEMU, but without
> success.
> Here is my option for booting my qemu:
> i386-softmmu/qemu -kernel bzImage -append "console=ttyS0
> video=uvesafb:ywrap,overlay:rgb16,480x800-32@60 root=/dev/nfs rw
> nfsroot=10.0.2.2:/root,udp ip=10.0.2.16:::::eth0:none 5" -net
>  nic,model=virtio -net user -soundhw all -usb -serial
> telnet:localhost:1200,server -vga std -m 512 -L ./pc-bios -bios bios.bin
> -virtfs
> local,path=/home/dallas/nfs,security_model=passthrough,mount_tag=v_tmp
>
> The virtio network is working, I could mount the nfs through virio net.
> And in the guest linux, I tried to mount v9fs by using following command:
> mount -t 9p -o trans=virtio -o debug=0xFFFF v_tmp /mnt
> but unfortunately I got the error:
> mount: mounting v_tmp on /mnt failed: No such device
> And I can't find the v_tmp neither in /sys/devices/virtio-pci/virtio1/ nor
> in /sys/bus/virtio/drivers/9pnet_virtio/virtio1/
> And before building the kernel, I enabled the Plan 9 Ressource Sharing
> Support under File System/Network File System, I also enabled the following
> configures:
> PARAVIRT_GUEST:
>         -> Processor type and features
>                 -> Paravirtualized guest support
> LGUEST_GUEST:
>         -> Processor type and features
>                 -> Paravirtualized guest support
>                         -> Lguest guest support
> VIRTIO_PCI:
>         -> Virtualization (VIRTUALIZATION [=y])
>                 -> PCI driver for virtio devices
> VIRTIO_BLK:
>         -> Device Drivers
>                 -> Block devices (BLK_DEV [=y])
>                         -> Virtio block driver
> VIRTIO_NET:
>         -> Device Drivers
>                 -> Network device support (NETDEVICES [=y])
>                         -> Virtio network driver
> Would you please help me to find out the problem why I couldn't mount the
> v9fs?
> Thank you very much!
> BR,
> Dallas

Hi Dallas,

what does 'lspci -vv' in the guest show?  Is there a device for virtio_9p?

do you have

CONFIG_NET_9P_VIRTIO=y

in your kernel's .config?

Cam