Hi Chris:
Thank you for your very informative response. I will post the message
to linux-fsdevel and see what they have to say about it.
Any comments you would like to share regarding why something like what
I suggested has apparently never been implemented?
Again, thanks!
David Bruzos (Systems Administrator)
-----Original Message-----
From: Chris Mason [mailto:[email protected]]
Sent: Thursday, April 26, 2012 4:04 PM
To: David Bruzos
Cc: [email protected]
Subject: Re: Optionally enforced time-based ACLs for BTRFS
On Thu, Apr 26, 2012 at 03:30:39PM -0400, David Bruzos wrote:
> Hi BTRFS folks: In my organization, many use cases exist for a
> time-based honoring field for FS ACLs. I've done some brief research
> regarding this topic, but I was unable to find any reference to such a
> thing in any file system. I understand that a feature like time-based
> honoring for ACLs may arguably be something that should exist in
> higher layers (E.G. some document management system), but on the other
> hand, I see no real reason that an extra ACL field that would allow
> for time-based granting/removing of permissions to some user would be
> a problem.
One of the interesting thing about linux acls is the filesystems don't
really implement acls. We implement xattrs, and the higher layers stuff
acls into them. In a few key spots we tell the higher layers how to do
that, and we also call back into the higher layers for permission
checks.
This is a long way of saying the changes would have to happen in the
generic acl code. This is a good thing, it will get much more review
that way.
I'd suggest posting this to linux-fsdevel.
-chris
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