What does "mapping=identity" mean in /etc/exports?

[poma]

On 02/16/13 22:09, Greg Scott wrote:
> Hello -
> 
> I'm migrating an old NFS server to newer hardware.  /etc/exports in the old environment looks like this:
> 
> /shares/IMSHCS01        *(rw,insecure,sync,no_root_squash,all_squash,mapping=identity,anonuid=0,anongid=0
> 
> So the old system is exporting the directory, /shares/IMSHCS01 to anyone and everyone who wants to connect, with a bunch of switches essentially making it wide open.
> 
> Wonderful.  
> 
> But on the new system, when I set up  /etc/exports the same way, I get this error: 
> 
> [root at nfs2013 etc]# exportfs -av
> exportfs: /etc/exports:1: unknown keyword "mapping=identity"
> 
> [root at nfs2013 etc]#
> 
> Getting rid of "mapping=identity", my shared directory exports just fine.  
> 
> I can find no mention of "mapping=identity" in any man pages, but several google references show this option in pasted-in copies of /etc/exports files.  My hunch is, this is an obsolete option and no longer supported - but what did it do in case my new server needs to behave the same way the old server behaved?
> 

Probably related to the unfsd[1].
iSeries? ;)

[1]
http://git.linux-nfs.org/?p=steved/nfs-utils.git;a=commitdiff;h=74a8f33de5f26d6bab11d5299318035d65bd60d0;hp=afc841a1f2a62645ec2dfaa333baf07e44a03c08


Cheers,
poma