- Unmount only works when forced.
- Readdir doesn't return dot and dotdot.
-- Open with truncation does not work.
-- Add options to mount: noauth, auth as other user, port, aname
-- v9fs pass the fcall up to the functions instead of bcopying data (as in Tread) like us
-read/write crashes with len > 1024
+- Add options to mount: noauth, auth as other user, port, aname.
+- Only copy data when strictly necessary.