Re: [RFC] VFS: FS CoW using redirection

From: Jörn Engel
Date: Wed Aug 23 2006 - 13:21:30 EST

On Sun, 9 July 2006 15:50:36 +0300, Al Boldi wrote:
> Consider something simple like this:
> VFS - anyFS1 (r/w) used normally, unless ENotFound, then redirect read to
> \ anyFS2, or CoW from anyFS2 to anyFS1.
> anyFS2 (r/o) used normally.

That concept is known as union mount. Jan Blunck did some patches in
that direction, you might be able to find them in the archives. If
not, just send him a mail.


-- more straw can't possibly matter...
-- Kirby Bakken
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