Re: [PATCH] PAG support, try #2

Trond Myklebust
2003-05-18T14:38:43Z

>>>>> " " == Ingo Oeser <ingo.oeser@informatik.tu-chemnitz.de> writes:

> On Wed, May 14, 2003 at 06:37:00PM +0100, David Howells wrote:
>> And then you have to have some method of prioritisation. You
>> may find that user dhowells has a token for
>> (fs=AFS,cell=redhat.com) and group engineering has a token for
>> (fs=AFS,cell=redhat.com). Which do you use?

> Union of both. And remember to subtract negative ACLs from
> positive ACLs. Prioritize users over groups in case of explicit
> mention.

> This is standard permission checking.

> Hmm, sounds too simple, so it must be wrong ;-)

Quite. Now that you've done the math, please explain how this should
be implemented efficiently. These are *networked* filesystems...

Cheers,
Trond