From owner-freebsd-fs Wed Nov 1 15: 9:12 2000 Delivered-To: freebsd-fs@freebsd.org Received: from smtp05.primenet.com (smtp05.primenet.com [206.165.6.135]) by hub.freebsd.org (Postfix) with ESMTP id C9F8737B4F9 for ; Wed, 1 Nov 2000 15:09:09 -0800 (PST) Received: (from daemon@localhost) by smtp05.primenet.com (8.9.3/8.9.3) id QAA17654; Wed, 1 Nov 2000 16:09:39 -0700 (MST) Received: from usr08.primenet.com(206.165.6.208) via SMTP by smtp05.primenet.com, id smtpdAAAf0aWyI; Wed Nov 1 16:09:27 2000 Received: (from tlambert@localhost) by usr08.primenet.com (8.8.5/8.8.5) id QAA06107; Wed, 1 Nov 2000 16:08:51 -0700 (MST) From: Terry Lambert Message-Id: <200011012308.QAA06107@usr08.primenet.com> Subject: Re: Hiding the lower layer in a stackable FS To: dima@cs.ubc.ca (Dmitry Brodsky) Date: Wed, 1 Nov 2000 23:08:51 +0000 (GMT) Cc: freebsd-fs@FreeBSD.ORG In-Reply-To: <200011011835.KAA04865@cascade.cs.ubc.ca> from "Dmitry Brodsky" at Nov 01, 2000 10:35:27 AM X-Mailer: ELM [version 2.5 PL2] MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-fs@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org > I am wondering if it is possible to hide the underlying filesystem > in a stackable filesystem configureation. [ ... ] Yes. This is the intended behaviour, and is how it works. It would not be useful to expose, for example, a namespace translation layer contents, if the untranslated contents were not useful. For example, a stacking layer that supported multiple versions of files might be implemented so that it used different names for different versions, and these names would not necessarily be useful, or might in fact be confusing, were they exposed to the user. Likewise, it's not a good idea (even though the integral code in UFS currently does this) to expose the quota file, where it could be tampered with or otherwise cause an FS with quotas enabled to lock up on you. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message