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Date:      Wed, 1 Nov 2000 23:08:51 +0000 (GMT)
From:      Terry Lambert <tlambert@primenet.com>
To:        dima@cs.ubc.ca (Dmitry Brodsky)
Cc:        freebsd-fs@FreeBSD.ORG
Subject:   Re: Hiding the lower layer in a stackable FS
Message-ID:  <200011012308.QAA06107@usr08.primenet.com>
In-Reply-To: <200011011835.KAA04865@cascade.cs.ubc.ca> from "Dmitry Brodsky" at Nov 01, 2000 10:35:27 AM

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> 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.


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