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

[Dallas Lee <mswplsdk@gmail.com>]

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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

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