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Date: Sun, 22 Jan 2006 01:05:14 +0300
From: Alexey Dobriyan <adobriyan@gmail.com>
To: Shaun Savage <savages@tvlinux.org>
Cc: linux-kernel@vger.kernel.org, Linus Torvalds <torvalds@osdl.org>
Subject: Re: CBD Compressed Block Device, New embedded block device
Message-ID: <20060121220514.GA15433@mipter.zuzino.mipt.ru>
References: <43D3467C.7010803@tvlinux.org>
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On Sun, Jan 22, 2006 at 12:46:52AM -0800, Shaun Savage wrote:
> Here is a patch for 2.6.14.5 of CBD
> CBD is a compressed block device that is designed to shrink the file
> system size to 1/3 the original size.  CBD is a block device on a file
> system so, it also allows for in-field upgrade of file system.  If
> necessary is also allows for secure booting, with a GRUB patch.
> +/*
> + *   IOCTL stuff, maybe new file

/dev/null ?

> +    	switch (cmd) {
> +        case HDIO_GETGEO:
> +                {
> +                        struct hd_geometry loc;
> +                        loc.heads = 4;
> +                        loc.sectors = 32;
> +                        loc.cylinders = cbd->nr_sections;
> +                        loc.start = 0;
> +                        return _COPYOUT(loc);
> +                }

Already in generic code.

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