[PATCH] nfs4acl: Fix owner mapping with ID_TYPE_BOTH

[Jeremy Allison]

On Fri, Sep 16, 2016 at 10:45:31AM -0700, Christof Schmitt wrote:
> 
> The requirement here was to keep the owner mapping to the special user
> entry, since that has a special meaning in the gpfs file system (the
> POSIX modebits are derived from the special entries).

The above does make more sense, and is more the way
users "expect" it to work.

> SID history is also a topic that keeps popping up. This would require
> having the entry stored for a gid to allow access from the old and new
> SID. In theory we could get there by mapping an entry for the owner SID
> to two entries in NFS4: special user and a group entry. I am not yet
> sure what implications that would have.

We do need more tests. Don't know currently what they'd
look like right now though.