Barebox and NFS problem

Trying to mount a directory called root, which has other directories in it
(a root fs) using NFS (nfs-kernel-server) on a Ubuntu 10.04LTS statically
assigned at 192.168.1.3  The client (mini2440 running barebox) is at
192.168.1.230

Modified /etc/exports:

/home/davef/Pengutronix/OSELAS.BSP-Pengutronix-Mini2440-2011.05.0
192.168.1.230(rw,no_root_squash,sync,no_subtree_check)

And in the barebox bootloader's /env/config file I have the line:

nfsroot="${eth0.serverip}:/home/davef/Pengutronix/OSELAS.BSP-Mini2440-2011.
05.0/platform-mini2440/root"

which when the kernel boots gives:

commandline: console=ttySAC0,115200 mini2440=0tb root=/dev/nfs
nfsroot=192.168.1
.3:/home/davef/Pengutronix/OSELAS.BSP-Mini2440-2011.05.0/platform-mini2440/root,

v3,tcp noinitrd ip=192.168.1.230::192.168.1.1:255.255.255.0:::
mtdparts=nand:256
k(barebox),64k(bareboxenv),2048k(kernel),-(root)                           
    
arch_number: 1999 

(Appears good, so far)

However, towards the end of the boot process I get the following error:

IP-Config: Complete:                                                       
    
     device=eth0, addr=192.168.1.230, mask=255.255.255.0, gw=192.168.1.1,  
    
     host=192.168.1.230, domain=, nis-domain=(none),                       
    
     bootserver=255.255.255.255, rootserver=192.168.1.3, rootpath=         
    
VFS: Unable to mount root fs via NFS, trying floppy.                       
    
VFS: Cannot open root device "nfs" or unknown-block(2,0)                   
    
Please append a correct "root=" boot option; here are the available
partitions: 
1f00             256 mtdblock0  (driver?)                                  
    
1f01              64 mtdblock1  (driver?)                                  
    
1f02            2048 mtdblock2  (driver?)                                  
    
1f03           63168 mtdblock3  (driver?)                                  
    
Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(2,0)  
Function entered at [<c0027b24>] from [<c028e84c>]                         
    
Function entered at [<c028e84c>] from [<c0008e8c>]                         
    
Function entered at [<c0008e8c>] from [<c0008f6c>]                         
    
Function entered at [<c0008f6c>] from [<c00090a8>]                         
    
Function entered at [<c00090a8>] from [<c0008ae8>]                         
    
Function entered at [<c0008ae8>] from [<c0023a1c>] 

Looking in /var/log/syslog I get the following error message:

Jun 16 20:36:53 davef-desktop mountd[2224]: refused mount request from
192.168.1.230 for
/home/davef/Pengutronix/OSELAS.BSP-Mini2440-2011.05.0/platform-mini2440/root
(/): not exported

Well, I have read 10-20 different postings on many sites and have tried a
number of suggestions with NO change in the error message.  The problem
doesn't seem related to trying to mount a "root" directory.  

Has anyone got NFS running using Barebox talking to a Ubuntu host or
insight into what the error message is really trying to tell me?  I would
have thought the server would just serve up files, why is it being told to
mount anything?

Thanks,
Dave

Your exported path looks different from the one that your target wants to
mount:

/home/davef/Pengutronix/OSELAS.BSP-Pengutronix-Mini2440-2011.05.0
/home/davef/Pengutronix/OSELAS.BSP-Mini2440-2011.05.0/[...]

Juergen,

Well spotted!  The correct path was in /etc/exports.  Because the "editor"
that is used when setting /env/config in barebox doesn't seem to work very
well, when using minicom, I manually typed the path in AND of course got it
wrong!!

Thank you VERY much.
Dave