Re: [Qemu-devel] [PATCH -V2 00/22] virtio-9p: paravirtual file system passthrough

[Luiz Capitulino <lcapitulino@redhat.com>]

On Tue, 16 Mar 2010 14:44:58 +0530
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> wrote:

> Hi,
> 
> 
> This patch series adds a paravirtual file system passthrough mechanism to QEMU
> based on the 9P protocol. With the current implementation, all I/O is implemented
> in the VCPU thread.  We've modified the protocol handlers so that we can support
> dispatch I/O in a thread pool. The actual thread pool implementation will be posted later
> 
> This patch set should work with any recent Linux kernel as virtio-9p has been
> supported for a few kernel releases now. Export dir is specified using the below
> Qemu option.
> 
> -device virtio-9p-pci,share_path=/mnt/,mount_tag=v_mnt
> 
> mount_tag is used to identify the mount point in the kernel. This will be available in Linux
> kernel via /sys/devices/virtio-pci/virtio1/mount_tag file.

 I tried this very '-device' line and I can see that the guest has loaded
the virtio modules, but there isn't anything in the virtio0 directory other
than standard sysfs files.

 Is there a way to debug this?

 Something possibly related is that, I had to rewind the tree by some commits
because this series doesn't apply against current HEAD.

> 
> Changes from V1:
> a) fsstress test suite runs successfully with the patches. That should indicate patches are stable
> enough to be merged.
> b) Added proper error handling to all posix_* calls.
> c) Fixed code to follow Qemu coding style.
> d) Other bug fixes most of which are folded back into the original patches
> e) rebased to qemu master 0aef4261ac0ec9089ade0e3a92f986cb4ba7317e
> 
> 
> -aneesh
> 
> 
>