[Samba] VFS : Replacing file during open()

[Hachi]

hello,

i have samba 3.5.4 on a debian  (testing)
i wrote a vfs-module, which (during the open()) moves a file on another 
disc in my server and places a symbolic link instead

example:
/samba/foo.bar
becomes
/samba/foo.bar -> /other/disc/foo.bar

compiling and using from a pc through samba is no problem, except for 
editing a file, that was just created and not closed yet

i guess, the file-descriptor defined in the files_struct is illegal 
after replacing the original file (as the inode changed)
so can i open the moved file and exchange the file-descriptor, or do you 
have other ideas to solve this?

TIA