Re: [PATCH] hfsplus: drop ACL support

[Christoph Hellwig <hch@lst.de>]

On Mon, Jul 16, 2018 at 05:07:48PM -0700, Andrew Morton wrote:
> On Sat, 14 Jul 2018 12:11:03 -0700 Viacheslav Dubeyko <slava@dubeyko.com> wrote:
> 
> > On Sat, 2018-07-14 at 16:06 -0300, Ernesto A. Fern�ndez wrote:
> > > The HFS+ Access Control Lists have not worked at all for the past
> > > five
> > > years, and nobody seems to have noticed. Besides, POSIX draft ACLs
> > > are
> > > not compatible with MacOS. Drop the feature entirely.
> > > 
> > 
> > Bugs need to be fixed but not to drop. Otherwise, it needs to drop the
> > whole HFS+ support from the kernel.
> 
> Yes, we could make it depend on BROKEN and hope that someone comes
> along and fixes it - there's little cost in carrying such a thing.
> 
> Or maybe it can never work for some reason and should indeed be
> dropped, I don't know.  I was interested in understanding the reasoning
> behind hch's ack, but I can't find it on linux-fs-devel.  Help?

The issue is that hfsplus supports it's own NFSv4-like ACLs, which
are nothing like the Posix ACLs supported by the Linux driver.  Or
in other words: they were always a Linux-only incompatible extension
that should never have been merged.