VFS Question: Is there more vfs_ops then are in skel ?

[troutb at abclabs.com]

I want to make a cp instead of rename when a file is open for rewrite

is there a default_vfs_ops.cp ?
or can I just make my own calls ?
can I write the file somewhere is on the file system?

I'm new at this, but would like to help out the cause while I help myself.

Basically, I trying to create a feautre that would do versioning .. most
likely in seperate read only location.

help ?