how to count nfs clients attached to my server?

[Skunk Worx]

Steve Berg wrote:
> Thomas Cameron wrote:
>> Skunk Worx wrote:
>>> Is there a way, on a server, to discover how many clients are 
>>> currently attached to a NFS file share?
>>>
>>> I'd like to be able to see a list of the clients that have "my" NFS 
>>> share mounted.
>>>
>>> It's my understanding /usr/sbin/exportfs gives a list but it is not 
>>> reliable as it depends on clients un-mounting the share properly.
>>>
>>> I suppose the nature of NFS makes it impossible to maintain/calculate 
>>> an accurate client list, but I thought I'd ask anyway.
>>
>> Have a look at /var/lib/nfs/rmtab and other files in /var/lib/nfs/
>>
> /usr/sbin/showmount will give you a list of IP's connected.
> 

Neither of these are reliable. They pick up new client mounts ok but do 
not reliably remove the entries when the clients umount the share.