linux-kernel - Re: [bisect] kernel 2.6.38 regression with root nfs mounting

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Date:	Fri, 25 Mar 2011 08:24:58 +0100
From:	Belisko Marek <marek.belisko@...il.com>
To:	Chuck Lever <chuck.lever@...cle.com>
Cc:	Trond.Myklebust@...app.com, broonie@...nsource.wolfsonmicro.com,
	bdowning@...os.net, linux-nfs@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [bisect] kernel 2.6.38 regression with root nfs mounting

On Wed, Mar 23, 2011 at 3:54 PM, Chuck Lever <chuck.lever@...cle.com> wrote:
>
> On Mar 23, 2011, at 10:30 AM, Belisko Marek wrote:
>
>> On Wed, Mar 23, 2011 at 3:06 PM, Chuck Lever <chuck.lever@...cle.com> wrote:
>>>
>>> On Mar 23, 2011, at 9:46 AM, Belisko Marek wrote:
>>>
>>>> On Wed, Mar 23, 2011 at 2:44 PM, Chuck Lever <chuck.lever@...cle.com> wrote:
>>>>>
>>>>> What does "rpcinfo -p 10.146.1.21" output look like?  Is NFS over UDP enabled on your server?
>>>> program vers proto   port
>>>>    100000    2   tcp    111  portmapper
>>>>    100000    2   udp    111  portmapper
>>>>    100024    1   udp  40517  status
>>>>    100024    1   tcp  51397  status
>>>>    100021    1   udp  44516  nlockmgr
>>>>    100021    3   udp  44516  nlockmgr
>>>>    100021    4   udp  44516  nlockmgr
>>>>    100021    1   tcp  55152  nlockmgr
>>>>    100021    3   tcp  55152  nlockmgr
>>>>    100021    4   tcp  55152  nlockmgr
>>>>    100003    2   tcp   2049  nfs
>>>>    100003    3   tcp   2049  nfs
>>>>    100003    4   tcp   2049  nfs
>>>>    100227    2   tcp   2049
>>>>    100227    3   tcp   2049
>>>>    100003    2   udp   2049  nfs
>>>>    100003    3   udp   2049  nfs
>>>>    100003    4   udp   2049  nfs
>
> The server is advertising NFS over UDP.  Why can't a client access your server via UDP?  What happens if you perform a normal post-boot mount of this file system via UDP?
Strange (rootfs mounted from SD card and try to mount nfs always fail)

mount -t nfs -o udp 10.146.1.21:/home/open-nandra/rootfs /mnt
svc: failed to register lockdv1 RPC service (errno 111).
lockd_up: makesock failed, error=-111
mount: mounting 10.146.1.21:/home/open-nandra/rootfs on /mnt failed:
Connection refused
# mount -t nfs -o tcp 10.146.1.21:/home/open-nandra/rootfs /mnt
svc: failed to register lockdv1 RPC service (errno 111).
mount: mounting 10.146.1.21:/home/open-nandra/rootfs on /mnt failed:
Connection refused

>
>>>>    100227    2   udp   2049
>>>>    100227    3   udp   2049
>>>>    100005    1   udp  58278  mountd
>>>>    100005    1   tcp  37178  mountd
>>>>    100005    2   udp  58278  mountd
>>>>    100005    2   tcp  37178  mountd
>>>>    100005    3   udp  58278  mountd
>>>>    100005    3   tcp  37178  mountd
>>>
>>> Can you boot if you specify either the "tcp" or "proto=tcp" NFSROOT mount options?
>> When add proto=tcp to bootargs it boot fine
>> (....nfsroot=10.146.1.21:/home/open-nandra/rootfs,proto=tcp....).
>>> Perhaps a network trace would be probative.  Capture on the server with "tcpdump -s0 -w /tmp/foo ip 10.146.1.199" (untested, but I think you get the idea) while the client is attempting to boot, and post.
>> Log is attached in attachment (too big 4.8M). Correct form is: tcpdump
>> -s0 -w /tmp/foo host 10.146.1.199
>
> Received.  I should have been clear: Please capture a non-working client boot attempt.  To reduce the size of the attachment, strip the TFTP packets before sending, and please gzip the file.
tcpdump log from wrong attemp in attachment.
>
> --
> Chuck Lever
> chuck[dot]lever[at]oracle[dot]com
>
>
>
>
>

regards,

marek


-- 
as simple and primitive as possible
-------------------------------------------------
Marek Belisko - OPEN-NANDRA
Freelance Developer

Ruska Nova Ves 219 | Presov, 08005 Slovak Republic
Tel: +421 915 052 184
skype: marekwhite
icq: 290551086
web: http://open-nandra.com

Download attachment "nfs_server_tcpdump.gz" of type "application/x-gzip" (196182 bytes)