Re: [PATCH] NFSv4: Change the default setting of the nfs4_disable_idmapping parameter

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On Thu, Mar 22, 2012 at 04:47:05PM -0400, bfields wrote:
> By the way, I finally got around to looking at the server side.
> 
> We don't have any way to negotiate with the client--we don't get an
> error back if the name we return in a getattr reply isn't one the client
> likes--so I don't think I can default the new behavior to "on" without
> breaking existing setups.

But we should still be able to make this effectively the default on new
server installations:  maybe:

	- Have the new module parameter be set based on a new
	  "ServerNumericMapping" variable in idmapd.conf defaults to
	  off.
	- Set it to "on" in the example idmapd.conf we distribute
	  upstream, and encourage distributions to do the same in the
	  idmapd.conf they install by default.

--b.

> 
> Other than that I think I'll just copy the client, module parameter and
> all.  That allows us to do the numeric case in-kernel and avoid
> polluting our mapping cache with lots of "obvious" 123<->"123" mappings.
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