Date: Wed, 24 Jun 1998 20:43:27 +0900 (JST) From: Michael Hancock <michaelh@cet.co.jp> To: Peter Wemm <peter@netplex.com.au> Cc: Chuck Robey <chuckr@glue.umd.edu>, Poul-Henning Kamp <phk@FreeBSD.ORG>, freebsd-current@FreeBSD.ORG Subject: Re: Heads up: block devices to disappear! Message-ID: <Pine.SV4.3.95.980624203411.28991I-100000@parkplace.cet.co.jp> In-Reply-To: <199806232113.FAA08470@spinner.netplex.com.au>
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Here's a stacking project that John Heidemann was suggesting a while
back...
- layer the devfs implementations.
Currently there are spec_ufs and fifo_ufs vnode operations
vectors. These are really just pushed together versions
of a mostly pass-through ufs layer over a spec vnode
or a fifo vnode. Separating them would clean the code
and allow for there to be a single special vnode for each
device or fifo.
Both Kirk and I have wanted to do this cleanup for a long time
but it's low on our stacks.
Specfs and fifofs aren't layers, they're just operations vectors that get
special-cased into the file system everywhere. It's actually pretty ugly.
Regards,
Mike
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