Re: svc: failed to register lockdv1 RPC service (errno 97).

From: Chuck Lever
Date: Mon Jun 29 2009 - 10:16:21 EST

On Jun 29, 2009, at 2:33 AM, db wrote:
I'm running arm 2.6.30 kernel and a 2.6.30 kernel on my desktop.

I see this "[1257016.190000] nfsd: last server has exited, flushing
export cache
[1257018.250000] svc: failed to register lockdv1 RPC service (errno 97).
."
On both ends. The arm is running debian lenny (armel). The desktop is
debian lenny (32bit i368). When this error i cannot continue to
transfer files.

Right at the moment I think this message is a coincidence. But let's chase it a little and see what we get.

First, you provided a couple of kernel log snippets here, but you didn't identify which snippet comes from your server, and which from your client. I assume the above one comes from your server, and the below comes from your client.

Do you happen to have IPv6 configured on your systems ("ifconfig - a")? What is the output of "rpcinfo" on your client and on your server? Are you running portmap or rpcbind on these systems?

Here is the config of the /etc/exports and what i try to use

"/media/nfs_shares/rsync/ *(rw,no_subtree_check)"
i mount on the desktop with

[root@desktop ]# mount 192.168.1.12:/media/Y/W/ /media/mount_point/ -o soft

"cat /proc/mounts" on your client so we can see exactly what mount options the kernel has chosen.

and i try using rsync like this (from my desktop).


rsync -av --progress /home/User_NAME/BACKUP/Y/W/X/ /media/ mount_point/W/X
and it just hangs. I then try to unmount it and i have problems doing
so. so i need to force the umount

"19051.391800] Performance counters on
[319051.391804] input device check on
[319051.391807] Actions configured
[399843.223405] RPC: Registered udp transport module.
[399843.223413] RPC: Registered tcp transport module.
[399843.346956] svc: failed to register lockdv1 RPC service (errno 97).
[401465.708049] device eth1 left promiscuous mode
[401689.794716] svc: failed to register lockdv1 RPC service (errno 97).
[402224.640535] svc: failed to register lockdv1 RPC service (errno 97).
[402356.791524] svc: failed to register lockdv1 RPC service (errno 97).
[402702.197491] svc: failed to register lockdv1 RPC service (errno 97).
"
I am only using nfs2. I am not using nfs4 / nfs3.

This issue is most troublesome as it breaks my use of nfs.

Have you captured a network trace? Start the trace before mounting the server. I usually use something like "sudo tethereal -w /tmp/raw" .

2009/5/12 Chuck Lever <chuck.lever@xxxxxxxxxx>:
On May 11, 2009, at 10:39 AM, Frans Pop wrote:

On Monday 11 May 2009, you wrote:

On May 10, 2009, at 8:48 PM, Frans Pop wrote:

After switching from 2.6.29.2 to 2.6.30-rc5 I get this new message
during boot of my home server:
svc: failed to register lockdv1 RPC service (errno 97).

Is this the only instance of this message, or do you see it several
times?

It's the only one.

This looks to be the result of the following commit:
commit 363f724cdd3d2ae554e261be995abdeb15f7bdd9
Author: Chuck Lever <chuck.lever@xxxxxxxxxx>
SUNRPC: rpcb_register() should handle errors silently
Move error reporting for RPC registration to rpcb_register's
caller.

Question is: do I really want to know this? I assume the "failure"
happened with previous kernels too, but silently.

The point of that commit was to report errors _less_ frequently.

:-)

The server-side RPC code is attempting to be more automatic about
which address families are supported by kernel NFS services. This
message tells us that some particular case is not handled yet. I
suspect you weren't seeing this error in the past at all.

Correct. Neither this exact error, nor anything remotely similar.

No, I meant that whether or not you saw an error message, the underlying
condition probably was not occurring before 2.6.30.

Can you report more about your server configuration? What
distribution is this?

Debian stable (Lenny).
nfs-common and nfs-kernel-server (1.1.2)

I'm using nfs4. rpc.statd is not running; rpc.mountd and rpc.idmapd are.

The NFS client and server appear to start lockd listeners for NFSv4. They
probably don't need to. But that's a separate issue.

Does user space have portmapper or rpcbind?

portmap (6.0)

Are you blacklisting ipv6.ko?

No, the server has IPv6 enabled.
I'm using NFS mainly from my laptop though, which does not have an IPv6
address for my home network.

What's the output of "rpcinfo" on your server after it has started NFSD?

I guess you mean the -p option?

$ rpcinfo -p
program vers proto port
100000 2 tcp 111 portmapper
100000 2 udp 111 portmapper
100003 2 udp 2049 nfs
100003 3 udp 2049 nfs
100003 4 udp 2049 nfs
100021 1 udp 47955 nlockmgr
100021 3 udp 47955 nlockmgr
100021 4 udp 47955 nlockmgr
100021 1 tcp 41860 nlockmgr
100021 3 tcp 41860 nlockmgr
100021 4 tcp 41860 nlockmgr
100003 2 tcp 2049 nfs
100003 3 tcp 2049 nfs
100003 4 tcp 2049 nfs
100005 1 udp 40032 mountd
100005 1 tcp 40623 mountd
100005 2 udp 40032 mountd
100005 2 tcp 40623 mountd
100005 3 udp 40032 mountd
100005 3 tcp 40623 mountd
391002 2 tcp 792 sgi_fam

In this case, it looks like the message can be treated as a notice. I think
in general we could safely make that a dprintk, but I'd like to wait a bit
more to see if we catch any bad behavior.

--
Chuck Lever
chuck[dot]lever[at]oracle[dot]com
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--
Chuck Lever
chuck[dot]lever[at]oracle[dot]com



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