v9fs was originally started and matinained by Ron Minnich. It was a 9P implementation for linux and has been updated for 9P2000 and the 2.6 kernel.
It is maintained on Sourceforge - look under CVS in the linux-9p directory.
Check out the V9FS Home Page for up to date info.
- 2.6 client working on x86 and PPC against u9fs, plan9ports, and Plan 9 file servers.
- Available in the 2.6 mainline kernel tree as of 2.6.14