Such driver exists already,
http://www.fs-driver.org/ and it's fully IFS.
2009/11/11 Love Nystrom <love.nystrom(a)gmail.com>
If not, the IFS driver can not implement the full NT
security model
(neither can FAT), but I think it would still be a good idea to have
an ext2/ext3 IFS driver. Even better if we could support
a journaling fs like f.ex reiserfs.
Best Regards // Love