2001-02-06 09:04:52 +00:00
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.\" -*- nroff -*-
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.\"
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.\" Copyright (c) 2000 Andrew Stevenson
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.\"
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.\" All rights reserved.
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.\"
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.\" This program is free software.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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2005-06-28 20:15:19 +00:00
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.\" If this manual page travels to places exotic (like projects other than
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2001-02-06 09:04:52 +00:00
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.\" FreeBSD) I would love to hear about it.
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.\" Andrew <andrew@ugh.net.au>
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.\"
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.\" $FreeBSD$
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.\"
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2012-01-19 09:51:07 +00:00
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.Dd January 19, 2012
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2001-02-06 09:04:52 +00:00
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.Dt VCOUNT 9
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2010-04-14 19:08:06 +00:00
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.Os
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2001-02-06 09:04:52 +00:00
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.Sh NAME
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.Nm vcount ,
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.Nm count_dev
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2001-02-06 14:58:39 +00:00
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.Nd "get total number of references to a device"
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.Sh SYNOPSIS
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2001-12-26 23:14:04 +00:00
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.In sys/param.h
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.In sys/time.h
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2001-10-01 16:09:29 +00:00
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.In sys/conf.h
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.In sys/vnode.h
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.Ft int
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.Fn vcount "struct vnode *vp"
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.Ft int
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.Fn count_dev "struct cdev *dev"
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.Sh DESCRIPTION
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.Fn vcount
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is used to get the number of references to a particular device.
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It allows for the fact that multiple vnodes may reference the same device.
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.Fn count_dev
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does the same thing as
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.Fn vcount ,
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but takes a
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2012-01-19 09:51:07 +00:00
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.Vt "struct cdev"
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2001-02-06 14:58:39 +00:00
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rather than a
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.Vt "struct vnode"
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pointer as an argument.
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2001-02-06 09:04:52 +00:00
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.Sh RETURN VALUES
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.Fn vcount
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and
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.Fn count_dev
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both return the number of references to the device.
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.Sh SEE ALSO
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.Xr VFS 9 ,
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2001-02-06 14:58:39 +00:00
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.Xr vnode 9
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2001-02-06 09:04:52 +00:00
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.Sh AUTHORS
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2005-06-28 20:15:19 +00:00
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This manual page was written by
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2001-02-06 09:04:52 +00:00
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.An Andrew Stevenson .
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