186d7f5d3SJohn Marino.\" 286d7f5d3SJohn Marino.\" Copyright (c) 2009 386d7f5d3SJohn Marino.\" The DragonFly Project. All rights reserved. 486d7f5d3SJohn Marino.\" 586d7f5d3SJohn Marino.\" Redistribution and use in source and binary forms, with or without 686d7f5d3SJohn Marino.\" modification, are permitted provided that the following conditions 786d7f5d3SJohn Marino.\" are met: 886d7f5d3SJohn Marino.\" 986d7f5d3SJohn Marino.\" 1. Redistributions of source code must retain the above copyright 1086d7f5d3SJohn Marino.\" notice, this list of conditions and the following disclaimer. 1186d7f5d3SJohn Marino.\" 2. Redistributions in binary form must reproduce the above copyright 1286d7f5d3SJohn Marino.\" notice, this list of conditions and the following disclaimer in 1386d7f5d3SJohn Marino.\" the documentation and/or other materials provided with the 1486d7f5d3SJohn Marino.\" distribution. 1586d7f5d3SJohn Marino.\" 3. Neither the name of The DragonFly Project nor the names of its 1686d7f5d3SJohn Marino.\" contributors may be used to endorse or promote products derived 1786d7f5d3SJohn Marino.\" from this software without specific, prior written permission. 1886d7f5d3SJohn Marino.\" 1986d7f5d3SJohn Marino.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 2086d7f5d3SJohn Marino.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 2186d7f5d3SJohn Marino.\" LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 2286d7f5d3SJohn Marino.\" FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 2386d7f5d3SJohn Marino.\" COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 2486d7f5d3SJohn Marino.\" INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 2586d7f5d3SJohn Marino.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 2686d7f5d3SJohn Marino.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 2786d7f5d3SJohn Marino.\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 2886d7f5d3SJohn Marino.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 2986d7f5d3SJohn Marino.\" OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3086d7f5d3SJohn Marino.\" SUCH DAMAGE. 3186d7f5d3SJohn Marino.\" 3286d7f5d3SJohn Marino.Dd December 14, 2009 3386d7f5d3SJohn Marino.Dt VCOUNT 9 3486d7f5d3SJohn Marino.Os 3586d7f5d3SJohn Marino.Sh NAME 3686d7f5d3SJohn Marino.Nm vcount , 3786d7f5d3SJohn Marino.Nm count_dev 3886d7f5d3SJohn Marino.Nd "get total number of references to a device" 3986d7f5d3SJohn Marino.Sh SYNOPSIS 4086d7f5d3SJohn Marino.In sys/conf.h 4186d7f5d3SJohn Marino.In sys/vnode.h 4286d7f5d3SJohn Marino.Ft int 4386d7f5d3SJohn Marino.Fn vcount "struct vnode *vp" 4486d7f5d3SJohn Marino.Ft int 4586d7f5d3SJohn Marino.Fn count_dev "cdev_t dev" 4686d7f5d3SJohn Marino.Sh DESCRIPTION 4786d7f5d3SJohn Marino.Fn vcount 4886d7f5d3SJohn Marinois used to get the number of references to a special device. 4986d7f5d3SJohn MarinoThis makes sense because multiple vnodes may reference the same device. 5086d7f5d3SJohn Marino.Pp 5186d7f5d3SJohn Marino.Fn count_dev 5286d7f5d3SJohn Marinodoes the same thing as 5386d7f5d3SJohn Marino.Fn vcount , 5486d7f5d3SJohn Marinobut takes a 5586d7f5d3SJohn Marino.Vt cdev_t 5686d7f5d3SJohn Marinorather than a 5786d7f5d3SJohn Marino.Vt "struct vnode" 5886d7f5d3SJohn Marinopointer as an argument. 5986d7f5d3SJohn MarinoIt may only be called for 6086d7f5d3SJohn Marino.Dv VBLK 6186d7f5d3SJohn Marinoand 6286d7f5d3SJohn Marino.Dv VCHR 6386d7f5d3SJohn Marinovnodes since 6486d7f5d3SJohn Marino.Fa v_rdev 6586d7f5d3SJohn Marinois an overloaded field. 6686d7f5d3SJohn Marino.Sh RETURN VALUES 6786d7f5d3SJohn Marino.Fn vcount 6886d7f5d3SJohn Marinoand 6986d7f5d3SJohn Marino.Fn count_dev 7086d7f5d3SJohn Marinoboth return the number of references to the device. 7186d7f5d3SJohn Marino.Sh SEE ALSO 7286d7f5d3SJohn Marino.Xr vnode 9 73