Re: RFC: make labeled NFS opt-in

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On Wed, Jan 04, 2017 at 11:56:36AM -0500, bfields wrote:
> This is something I should have noticed before merging labeled NFS:
> labeled NFS shouldn't be on by default, among other reasons because it
> assumes everybody's using consistent security policies.  As 4.2 is
> getting turned on by default, this is starting to generate bug reports.
> 
> The patch below turns it off by default, and provides a new option to
> turn it on per export.  The drawback is a regression on kernel upgrade
> for anyone depending on labeled NFS, until they find the new option.  My
> impression is that's a specialized use case that still has a small
> number of users at this point, so I think we can get away with that.
> 
> The below is untested.  I have a (small) nfs-utils patch as well.

OK, I've tested now, the only problem was actually a preexisting
bug--I'll post the patches, plus the companion nfs-utils patch.

--b.
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