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Message-ID: <b6c5339f0809190655l5b7a1641l8febd816237cc2b9@mail.gmail.com>
Date: Fri, 19 Sep 2008 09:55:22 -0400
From: "Bob Copeland" <me@bobcopeland.com>
To: "Andrey Vul" <andrey.vul@gmail.com>
Subject: Re: Some hfsplus questions
Cc: linux-kernel <linux-kernel@vger.kernel.org>
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On Thu, Sep 18, 2008 at 9:55 PM, Andrey Vul <andrey.vul@gmail.com> wrote:
> I have some questions about hfsplus:
> 1) Is there a / how do you patch the fs driver / mount options to
> allow starting from an offset (f.e. certain DMG files' HFS+ superblock
> start at 32768)?

In general you do this with losetup(8) instead of in the filesystem itself,
since the FS generally doesn't care about the block device.

e.g. losetup -o 32768 ....

> 2) Is there a / how do you patch the fs driver to allow for
> transparent zlib decompression of the HFS+ volume (inside the DMG
> file)?

No idea.  A device mapper target (or fuse-over-loopback) could do that but
I don't know if there is something suitable already.

-- 
Bob Copeland %% www.bobcopeland.com