freeBSD nullfs together with nfs and "silly rename"

[Leon Meßner]

Hi,
I hope this is not the wrong list to ask. Didn't get any answers on
-questions.

When you try to do the following inside a nullfs mounted directory,
where the nullfs origin is itself mounted via nfs you get an error:

# foo 
# tail -f foo& 
# rm -f foo 
tail: foo: Stale NFS file handle
# fg

This is really a problem when running services inside jails and using
NFS as storage. As of [2] it looks like this problem is known for a
while. On a normal NFS mount this does not happen as "silly renaming"
[1] works there (producing nasty little .nfsXXXX files).

TIA,
Leon

[1] http://nfs.sourceforge.net/#faq_d2
[2] http://ftp.freebsd.org/pub/FreeBSD/development/FreeBSD-CVS/src/sys/nfsclient/nfsnode.h,v rev:1.32.2.1
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