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Subject: Re: [PATCH 2/2] hfsplus: add mount option to enable ACL support
From: Viacheslav Dubeyko <slava@dubeyko.com>
To: Christoph Hellwig <hch@infradead.org>, Jan Kara <jack@suse.cz>
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        Alexander Viro <viro@zeniv.linux.org.uk>
Date: Tue, 17 Oct 2017 08:20:27 -0700
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On Tue, 2017-10-17 at 01:03 -0700, Christoph Hellwig wrote:
> On Tue, Oct 17, 2017 at 09:53:46AM +0200, Jan Kara wrote:
> > 
> > With xattr support the situation is different. It has been broken
> > for four
> > years and nobody complained. That is a good indication nobody uses
> > that
> > code and we can drop it. Furthermore, Christoph pointed out that
> > original
> > HFS+ in MacOS never supported xattrs which makes it even less
> > likely that
> > someone uses that functionality (as you cannot use it if you want
> > your
> > filesystem to stay compatible with MacOS).
> s/xattrs/Posix ACLs/g

The extended attributes supported in Mac OS X many years already [1].
Of course, it looks like more than Richacls [2]. But no Richacls was
available during the implementation phase.

[1] https://developer.apple.com/legacy/library/documentation/Darwin/Reference/ManPages/man1/xattr.1.html
[2] https://en.wikipedia.org/wiki/Richacls