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Bug#579397: STAT_FAIL to debian for SM_MON of 192.168.120.254, No canonical hostname found for 192.168.120.254

On 05/24/10 11:22 AM, Chuck Lever wrote:

On 05/21/10 09:38 PM, Ben Hutchings wrote:

On Sat, 2010-05-22 at 07:49 +0800, Steven Shiau wrote:

Same problem here. However, mine is on the client side.
On sid system, running kernel is 2.6.32-5-686, nfs-common is 1:1.2.2-1.
When I mount my NFS server 192.168.120.254, it works. However, if I want
to use some tool which need to lock file to save the file on the NFS
server, e.g.
vgcfgbackup -f $NFS_MNT_POINT/vg.cfg
I get the message "lockd: cannot monitor 192.168.120.254", and the
message shown on the /var/log/daemon.log:
May 21 08:52:44 debian rpc.statd[1298]: STAT_FAIL to debian for SM_MON
of 192.168.120.254
May 21 08:52:44 debian rpc.statd[1298]: No canonical hostname found for
192.168.120.254

[...]

nfs-utils 1.2.2 includes the change:

commit 8ce130c4c828b9d13d429f22160f992b9c1d45cd
Author: Chuck Lever<chuck.lever@oracle.com>
Date: Thu Jan 14 12:24:15 2010 -0500

statd: Support IPv6 in sm_mon_1_svc()

This appears to have removed support for IPv4 literals. Was this
intentional?


statd usually requires a DNS reverse mapping for any host it monitors.
Does your DNS have a reverse mapping for 192.168.120.254?

It looks like the new logic is more restrictive than the old statd when
mon_name is a presentation address. The old code simply allowed
presentation addresses with no reverse mapping. The new code requires a
reverse DNS mapping for presentation addresses. I think even an entry in
/etc/hosts would allow a raw address to work in this case.

We can probably remove the reverse mapping constraint for presentation
addresses. A simple fix might be to change statd_canonical_name() from:

freeaddrinfo(ai);
if (!result)
return NULL;

to

freeaddrinfo(ai);
if (!result)
return strdup(hostname);

Let me know if this works.
Any update? I have a patch ready for nfs-utils to fix this regression, but I need confirmation that it addresses your problem.
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