missing VFS-calls in DazukoFS

Hi,

In January 2010 I went through to see how "complete" DazukoFS is as a
stackable filesytem. To do this, I looked at the VFS-calls used by the
following filesystems:

ext2,ext3,ext4,xfs,isofs,reiserfs,nfs,cifs,smbfs,tmpfs

and checked to see if DazukoFS stacked all of these VFS-calls. Below
is a list of the VFS-calls that DazukoFS does _not_ stack along with
the filesystems that use those calls. I suppose you could view this as
a TODO list for DazukoFS.

(Note: This was performed in January 2010, so things may have changed
since then.)

dentry_operations
.d_delete               smbfs,nfs
.i_put                  nfs

file_operations
.lock                   cifs
.setlease               cifs,nfs
.unlocked_ioctl         cifs,ext2,ext3,ext4,xfs
.compat_ioctl           ext2,ext3,ext4,reiserfs,xfs
.splice_write           ext2,ext3,ext4,reiserfs,xfs,nfs,tmpfs
.open_exec              xfs
.check_flags            nfs

inode_operations