Date: Wed, 28 Feb 2001 21:21:58 -0800 From: Julian Elischer <julian@elischer.org> To: "Long, Scott" <scott_long@btc.adaptec.com> Cc: "'freebsd-arch@freebsd.org'" <freebsd-arch@freebsd.org> Subject: Re: Arch question for a UDF FS driver Message-ID: <3A9DDC76.3B749D83@elischer.org> References: <E0BFB46945D5D411BB590000D11ABE9203349F@btcexc01.btc.adaptec.com>
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"Long, Scott" wrote:
I already have some UDF work.
let's talk..
>
> I've starting writing a UDF FS driver for FreeBSD, and am coming to a
> decision point. UDF is somewhat similar to ufs in that a File Entry is
> analogous to an inode, so I'd like to implement the filesystem using the
> vget vfsop. Problem is that vget uses ino_t which is a uint32_t, while the
> Unique Id (aka inode number) for UDF is a uint64_t. Unique Id's are
> numbered sequentially starting at 16 (0 is the root dir, 1-15 are reserved),
> and may be sparse. So what color should I paint the bikeshed?
>
> Pink: Just pretend the UniqueId is 32 bits. If it is ever more than 32
> bits, panic. Advantage: it's pretty hard to roll over 32 bits on a CD or
> DVD. Disadvantage: it's a gross hack.
>
> Muave: Don't implemenet it with vget. Advantage: no need to worry about
> the UniqueId. Disadvantage: harder to support some of the filesystem
> features, like hardlinks, once write support is done.
>
> Orange: Get ino_t bumped up to a uint64_t and modify all the other
> filesystems to deal with it accordingly. Advantage: no hackery needed for
> UDF. Disadvantage: may be the mother of all bikesheds.
>
> I prefer orange. Thanks for the advice.
>
> Scott
>
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