http://xfsskel.bsd.lv/
This is great. I didn't know about it before. I think one reason
people haven't done much with xfs is the lack of good documentation /
examples, but it looks like you spent a lot of time making them.
If somebody really wanted FUSE, it could probably be done based on top
of xfsskel.
Tedu, last I heard, in-tree XFS only supported one mount-point at a
time, which is pretty cripping (maybe Stacken people can comment on
this). Beyond the whole block-level thing. FUSE does both block-level
operations and multiple mount-points.
These limitations may have been addressed in later versions of NNPFS,
but I don't know. Some serious work will need to be done anyway. If
you're looking for user-land FS stuff, puffs may be less work.
Kristaps