Re: NFS problem on Microblaze LE

[Michal Simek <monstr@monstr.eu>]

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J. Bruce Fields wrote:
> On Wed, Mar 02, 2011 at 05:11:53PM +0100, Michal Simek wrote:
>> J. Bruce Fields wrote:
>>> On Wed, Mar 02, 2011 at 02:04:18PM +0100, Michal Simek wrote:
>>>> Hi,
>>>>
>>>> I am getting some troubles to get nfs work on new Microblaze
>>>> little-endian platform and I would like to ask you for some
>>>> recommendations how to debug it.
>>>>
>>>> First of all I need to write that Microblaze big-endian platforms have no problem.
>>>> The problem only happen if I use mount without -o nolock option
>>>> (mount -t nfs 192.168.0.101:/tftpboot/nfs /mnt)
>>>> If I use -o nolock option I have no problem to use nfs.
>>>>
>>>> I use xilinx emaclite and axi emac(it is not in the mainline now)
>>>> driver and I have no problem to use dhcp, ftp, http, telnet and
>>>> other internet protocols.
>>>>
>>>> I compared debug logs on big and little endian platform(rootfs has
>>>> the same setting) I found that little-endian got packet which is
>>>> shorter than on big endian which I have added to the log below.
>>>> The second thing, which I think is connected to the previous point,
>>>> is that I am getting BADCRED in rpc_verify_headers.
>>>>
>>>> Is there any option/macro/recommended debug technique how to see
>>>> packets? I need to get some clue how to see packet and then how they
>>>> are passed to rpc_verify_header function.
>>> A good first step would be to look at the network traffic with
>>> wireshark.
>> Yes, I am looking at it all the time but I can't see anything weird.
>> Look at attachment. 192.168.0.101 - host, 192.168.0.103 target.
>>
>> There are two NULL calls and two reply calls.
> 
> Yes, looks normal.  I wonder why everything exept portmap is using udp,
> but your debugging traces refer to tcp?
> 
> Oh, wait, it's talking about portmap map/unmap calls: could try try
> running wireshark on the loopback interface?  (run with -ilo).
> 

It is captured by tcpdump (tcpdump -i lo -e -S -n -vvv -x -w nfs)
If you want to use different setting please let me know. (I have also verbose node but saving to 
file should be enough for you).


Thanks,
Michal




-- 
Michal Simek, Ing. (M.Eng)
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel 2.6 Microblaze Linux - http://www.monstr.eu/fdt/
Microblaze U-BOOT custodian

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