Re: NFS -- Hurd

[tb@MIT.EDU (Thomas Bushnell, BSG)]

Kalle Olavi Niemitalo <tosi@ees2.oulu.fi> writes:

> tb@MIT.EDU (Thomas Bushnell, BSG) writes:
> 
> > If you look at the implementation of the NFS lookup call in the Hurd
> > nfsd (hurd/nfsd/ops.c:op_lookup) you will see that the server uses
> > O_NOTRANS to prevent such activation.
> 
> I see.  Does this mean it isn't possible to export trees containing
> multiple file systems?  (The Linux user-space nfsd allows that; the
> kernel-space nfsd doesn't.)

The Hurd version does let you export trees containing multiple
filesystems; but the multiple-filesystem aspect is only available in
the mount protocol.  Once a mount has happened, from a given file
handle, you cannot get out of the filesystem that that file handle
refers to.

Thomas