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Date: Wed, 16 Apr 2014 04:09:16 -0700
From: Christoph Hellwig <hch@infradead.org>
To: Filipe David Manana <fdmanana@gmail.com>
Cc: Chandan Rajendra <chandan@linux.vnet.ibm.com>,
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Subject: Re: [PATCH] Btrfs: implement inode_operations callback tmpfile
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On Wed, Apr 16, 2014 at 11:36:23AM +0100, Filipe David Manana wrote:
> The xattr is needed for the case where an acl is inherited. And 5
> units are required for orphan insertion (see comment on top of
> btrfs_orphan_add).
> I'll update the comment.

I don't think think a tmpfile should inherit any ACL, as it does not
have a parent.  Anyway, we're currently having a discussion on that on
various lists including linux-fsdevel.