Re: [Qemu-devel] [V9fs-developer] Breaking out virtfs as a standalone server?

[Jim Garlick]

FWIW I've put a prerelease (1.0-pre20) of a pure 9P2000.L server up here:

http://code.google.com/p/diod/

If anyone would like to give it a spin with a 2.6.38-ish kernel,
please do and let me know how it goes! 

To get started with a quick (insecure) test:

$ tar xjf diod-1.0-pre20.tar.bz2
$ cd diod-1.0-pre20
$ ./configure --disable-munge
$ make
$ sudo diod/diod -n -f -l 0.0.0.0:564 -c /dev/null -e /tmp
$ sudo utils/diodmount  -n -oport=564 localhost:/tmp /mnt

I've been testing on a RHEL 6 (glibc-2.12) based system.
We're just starting to test on big clusters with NFS.
We've been successful with home directories and other things, but
there is still much testing to do before a real 1.0 release.

Also, as I mentioned before, I have attempted to document 9P2000.L
as I've implemented it (referring to the kernel and qemu source)
on a wiki page here: 

   http://code.google.com/p/diod/wiki/protocol

Maybe that will be a helpful start for someone implementing a new
server, until something more official comes along.

Jim

On Mon, Apr 11, 2011 at 01:28:49PM -0700, Venkateswararao Jujjuri wrote:
> On 04/11/2011 06:42 AM, Rob Landley wrote:
> > Right now, there's no decent userspace server for the 9p filesystem that
> > I can find.  (In part because the 9P2000.L spec is an undocumented work
> > in progress.)
> This statement is true for 9P2000.L protocol;
> But for older protocols we have standalone servers like spfs/npfs.
> http://sourceforge.net/projects/npfs/
> http://9p.cat-v.org/implementations
> 
> > The only up-to-date server seems to be virtfs in qemu, which has no TCP
> > transport layer.
> >
> > Are there any plans to:
> >
> > A) Add a TCP transport layer so we can test with something we can
> > intercept/examine/log/redirect with netcat and such?
> No plans as of now; I know folks in the Latchesar Ionkov attempted char 
> dev transport.
> Not sure the latest though.
> 
> http://sourceforge.net/mailarchive/forum.php?thread_name=AANLkTim4eZttAmaNQfOuM1h7cmLvO-osckHNunMvG7o%2B%40mail.gmail.com&forum_name=v9fs-developer
> > B) Break the 9p server out so it could be built as a standalone
> > userspace program?
> 
> No plans yet..and I think this is a bigger discussion.
> Being part of QEMU brings few implicit advantages like simplicity in 
> sharing, security
> and performance advantage. I think taking it out can have its own merits.
> 
> If there is enough interest I am sure these two are something we can 
> look at as a community.
> 
> - JV
> 
> > Rob
> >
> 
> 
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