linux-kernel - Re: [RFC] View-Based File System Model with Program-Scoped Isolation

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Message-ID: <20250904220650.GQ39973@ZenIV>
Date: Thu, 4 Sep 2025 23:06:50 +0100
From: Al Viro <viro@...iv.linux.org.uk>
To: Blake McBride <blake@...ridemail.com>
Cc: "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"brauner@...nel.org" <brauner@...nel.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	Colby Wes McBride <colbym84@...il.com>
Subject: Re: [RFC] View-Based File System Model with Program-Scoped Isolation

On Thu, Sep 04, 2025 at 09:52:22PM +0000, Blake McBride wrote:

> Proposed Model
> --------------
> The key concept is the introduction of *views*. A view is a named,
> use-case-specific file hierarchy that contains a subset of the overall
> files on the system. Each view presents its own hierarchy, which can
> be completely different from others. Files may appear in multiple
> views, and may even have different names per view.


What happens on cross-directory rename?  Within the same "view", that is.
How does it map to changes observable in other views of yours?