Date: Fri, 2 Jan 2004 16:00:20 +0000
From: Christoph Hellwig <hch@infradead.org>
To: Libor Vanek <libor@conet.cz>
Cc: Muli Ben-Yehuda <mulix@mulix.org>, linux-kernel@vger.kernel.org
Subject: Re: Syscall table AKA hijacking syscalls
Message-ID: <20040102160020.A24026@infradead.org>
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	Libor Vanek <libor@conet.cz>, Muli Ben-Yehuda <mulix@mulix.org>,
	linux-kernel@vger.kernel.org
References: <3FF56B1C.1040308@conet.cz> <20040102151206.GJ1718@actcom.co.il> <3FF59073.3060305@conet.cz>
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In-Reply-To: <3FF59073.3060305@conet.cz>; from libor@conet.cz on Fri, Jan 02, 2004 at 04:38:27PM +0100
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On Fri, Jan 02, 2004 at 04:38:27PM +0100, Libor Vanek wrote:
> I'm working on my diploma thesis which is adding snapshot capability 
> into Linux VFS (so you can do directory based snapshots - not complete 
> device, like in LVM). It'll consist of two separete modules:
> Snapshot module:
> - will hijack (one or another way) calls to open/move/unlink/mkdir/etc. 
> syscall
> - when will detect change to selected directory (which I want to 
> snapshot), it'll copy/move old file/directory to some temporary 
> (selected when creating snapshot) - in fact - copy on write behaviour

This should be implemented as a stackable filesystem..

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