linux-kernel - Re: Thinking outside the box on file systems

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Date:	Wed, 15 Aug 2007 10:54:13 -0700 (PDT)
From:	Marc Perkel <mperkel@...oo.com>
To:	Phillip Susi <psusi@....rr.com>, Kyle Moffett <mrmacman_g4@....com>
Cc:	Michael Tharp <gxti@...tiallystapled.com>,
	alan <alan@...eserver.org>, Marc Perkel <mperkel@...oo.com>,
	LKML Kernel <linux-kernel@...r.kernel.org>,
	Lennart Sorensen <lsorense@...lub.uwaterloo.ca>
Subject: Re: Thinking outside the box on file systems

--- Phillip Susi <psusi@....rr.com> wrote:

> Kyle Moffett wrote:
> > Going even further in this direction, the
> following POSIX ACL on the 
> > directories will do what you want:
> > 
> > ## Note: file owner and group are kmoffett
> > u::rw-
> > g::rw-
> > u:lsorens:rw-
> > u:mtharp:rw-
> > u:mperkel:rw-
> > g:randomcvsdudes:r-
> > default:u::rw-
> > default:g::rw-
> > default:u:lsorens
> > default:u:mtharp:rw-
> > default:u:mperkel:rw-
> > default:g:randomcvsdudes:r-
> 
> 
> The problem that I have with this setup is that it
> specifies an ACL on 
> EACH file.  Yes, you can set a default on the
> directory for newly 
> created files, but what if I want to add a user to
> the access list for 
> that whole directory?  I have to individually update
> every acl on every 
> file in that directory.  Also if you move a file
> created elsewhere into 
> that directory, it retains its existing permissions
> doesn't it?  I would 
> rather just add a new ace to the directory itself
> which specifies that 
> it applies to the entire tree.  Then you only need
> to store a single acl 
> on disk, and only have to update one acl to add a
> new user.
> 
> 

In the model I'm suggesting files and directories no
longer have permissions so ACLs go away. Only users,
groups, managers, applications, and other objects have
permissions.

So if you move a file into the tree then everything
that has permission to that tree has rights to the
file.

Marc Perkel
Junk Email Filter dot com
http://www.junkemailfilter.com

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