From owner-freebsd-hackers  Thu Feb  3  1:26:12 2000
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Date: Thu, 3 Feb 2000 10:26:15 +0100
From: Guido van Rooij <guido@gvr.org>
To: freebsd-hackers@freebsd.org
Subject: open ref counts in CAM and vn
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A collegue fo mine had the problem that it was possible to
vnconfig -u a vn device that was currently in use. This strikes
me as odd.
When looking through the da device code, I notice a similar problem.
Suppose I have a zip fdisk mounted with a disklabel and 2
ufs partitions on it. When I mount both partitions, the disk
will be locked. But it will be unlocked at the first unmount.
I guess there should be a refcounter that keeps track of
the amount of opens and only unlock devices at the last close.

Same for vn.c.

Any comments?

-Guido


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