linux-kernel - atomically swap two files

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Message-ID: <icmfu2$nga$1@dough.gmane.org>
Date:	Thu, 25 Nov 2010 20:11:46 +0000
From:	"Frank A. Kingswood" <frank@...gswood-consulting.co.uk>
To:	linux-kernel@...r.kernel.org
Subject: atomically swap two files

Hi!

Is it possible to swap two files in an atomic way, so that after the 
syscall either the two files have exchanged names or neither has been 
modified?

I suspect that btrfs could do it, but I'm wondering about ext3/4.

Frank

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