Why my NFS not work

[Altera_Forum]

I creat a Nios II Linux application project and want to run it in cyclone1c20 borad through NFS.  

I use command mount -t nfs 192.168.0.7:/mnt/nfs /mnt/nfs -n 192.168.0.7 is my Linux host IP .But my NFS not work rightly . The information tell me time out ,why?

[Altera_Forum]

You have to make sure you have allowed access to your nfs directory on the host machine by specifying it in /etc/exports. 

 Normally you export a different directory other than /mnt/nfs.  If you want to export /home/user from your host machine and your nios2 IP address is "w.x.y.z", then try the following in etc exports.  /home/user w.x.y.z(rw,no_root_squash)   You then might have to restart the nfs server on your host machine.  On the nios2, try using the following line in your /etc/rc script, or manually type it in after logging in.  /bin/mount -t nfs 192.168.0.7:/home/user /mnt/nfs -n -o nolock &   Hopefully this helps.

[Altera_Forum]

I do it as you tell me ,but my NFS still not work ,why? 

The Nios information as follows:# nfs warning :mount version older than Kernel# NFS: NFSv3 not supported# mount:PRC:Time out

[Altera_Forum]

Hi su-30mk, 

 > The Nios information as follows: ># nfs warning :mount version older than Kernel ># NFS: NFSv3 not supported ># mount:PRC:Time out  This looks like portmap is not running. Make sure you have RPC and the portmapper started prior to running the mount.  Regards, --Scott  BTW: if you need to do simple NFS testing (file download), you can use the u-boot boot monitor.

[Altera_Forum]

You said portmap is not running.What can i do?Can you give me some example and tell me how let portmap runing,thank you very much.

[Altera_Forum]

also make sure NFS is enabled in your kernel configuration.

[Altera_Forum]

Hi su-30mk, 

 > an you give me some example and tell me how let portmap runing  You can simply enter the command:  $ portmap  I haven't used NFS with the Nios-II uClinux yet. I'm assuming that it is indeed available with the other network apps (it should be if the nfs server is available).  Regards, --Scott

[Altera_Forum]

Yes i do it ,but system not support portmap

[Altera_Forum]

> but system not support portmap 

 You can try building portmap using the sources from uClinux.org.  Regards, --Scott

[Altera_Forum]

I have a related problem. I have a uKit board with a Cyclone running uClinux. 

 I am using the configuration stated in the first reply:  <div class='quotetop'>QUOTE </div>  --- Quote Start ---  /bin/mount -t nfs 192.168.0.7:/home/user /mnt/nfs -n -o nolock &[/b]  --- Quote End ---    When I run this, I get the warning:  <div class='quotetop'>QUOTE </div>  --- Quote Start ---  # nfs warning :mount version older than Kernel[/b]  --- Quote End ---    I am able to browse through the mounted directory to a point, but if I try to copy "cp" anything from the /mnt/nfs over to my ramdisk at /tmp, then it hangs with no error messages. This also occurs if I try to run something directly from the nfs mounted directory.  My kernel that is on my host machine is older, it is a 2.4.20 kernel. I&#39;m guessing that is why I get the warning. However, should this really be a problem?  I am hoping that I can use nfs to speed up my development cycle, but so far it hasn&#39;t worked out for me.  Does anyone have any ideas on why it would be unstable?