[9fans] v9fs & virtio

[9fans] v9fs & virtio

[Venkatesh Srinivas]

Hi,

The v9fs docs mention that it can use virtio as a transport. How does
one get a 9P server running in such a way that it can be connected to
via virtio?

Thanks,
--vs

Re: [9fans] v9fs & virtio

[Eric Van Hensbergen]

On Wed, Jun 11, 2008 at 6:46 AM, Venkatesh Srinivas <me@acm.jhu.edu> wrote:
>
> The v9fs docs mention that it can use virtio as a transport. How does
> one get a 9P server running in such a way that it can be connected to
> via virtio?
>

Writing the presentation on this for KVM Forum right now.

There are two current variants -- a gateway server which is integrated
into lguest (patches have been posted to the lguest mailing list, but
I can put it someplace else if folks are interested) -- then you
essentially start lguest and feed it an argument specifying where you
server lives (-9p 10.0.0.1:567).

The KVM variant was done by Anthony Ligouri, and it has a server
integrated into qemu.  The patched kvm-qemu requires a "-shared
<path>" name to start the server.

In both cases, you just mount -t 9p nodev /mnt -o trans=virtio

Its stable, but preliminary at this point.  The main problem being
neither implementation is anywhere near optimal.

Lucho had an older version of a kvm which had an integrated spfs-based
server, but I'm not sure he's ported that forward.

I don't believe there's any support in Plan 9 at the moment for the 9p
virtio channel, but it shouldn't take someone that much to add it.

I'll try putting up something with a bit more more information and the
associated patches on my kernel.org web page.

                  -eric