fedora-list Digest, Vol 35, Issue 109

[Leonid Flaks]

> Does nfs4 work on fc6.  Either I'm missing a critical setup step or it
> is just plain broken.  I can mount the directory with nfs v3, but when
> I try nfsv4 I get the following error.
>
>     [root at arbol wolfgang]# mount arbol:/u/wolfgang /mnt -t nfs4
>     mount.nfs4: Operation not permitted
>     [root at arbol wolfgang]# mount arbol:/u/wolfgang /mnt -t nfs
>     [root at arbol wolfgang]# 
>
> I found some instructions at the following link, but I believe that
> all my files are setup in a comparable (but not identical) fashion.
> Surely someone has gotten this working.  What was the trick?
>
>     http://www.brennan.id.au/19-Network_File_System.html#nfs4
>
> -wolfgang
>   
Yes, I made it work.
If you configured your server correctly, then attempt to mount with nfs4 
version should be made differently then with nfs.
nfs4 uses 'pseudo' file system and nfs2,3 not - they use absolute path 
on the server. The root of pseudo fs is marked in exports file with 
fsid=0 option. All other mount points on the client are referred 
relative to that mount point. It is highly unlikely that you have it 
matching the root of the server fs - you would be exporting the whole 
server's file system root partition.
If you don't have this fsid=0 record in /etc/exports, then nfs4 is 
confused and fails with the complain that you see.
Documentations is not clear on that at all, I figured it out by just 
trying different things.

Leon