Re: Syscall table AKA hijacking syscalls

Christoph Hellwig
2004-01-02T16:00:26Z

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..