1*86d7f5d3SJohn Marino.\" 2*86d7f5d3SJohn Marino.\" Copyright (c) 2009 3*86d7f5d3SJohn Marino.\" The DragonFly Project. All rights reserved. 4*86d7f5d3SJohn Marino.\" 5*86d7f5d3SJohn Marino.\" Redistribution and use in source and binary forms, with or without 6*86d7f5d3SJohn Marino.\" modification, are permitted provided that the following conditions 7*86d7f5d3SJohn Marino.\" are met: 8*86d7f5d3SJohn Marino.\" 9*86d7f5d3SJohn Marino.\" 1. Redistributions of source code must retain the above copyright 10*86d7f5d3SJohn Marino.\" notice, this list of conditions and the following disclaimer. 11*86d7f5d3SJohn Marino.\" 2. Redistributions in binary form must reproduce the above copyright 12*86d7f5d3SJohn Marino.\" notice, this list of conditions and the following disclaimer in 13*86d7f5d3SJohn Marino.\" the documentation and/or other materials provided with the 14*86d7f5d3SJohn Marino.\" distribution. 15*86d7f5d3SJohn Marino.\" 3. Neither the name of The DragonFly Project nor the names of its 16*86d7f5d3SJohn Marino.\" contributors may be used to endorse or promote products derived 17*86d7f5d3SJohn Marino.\" from this software without specific, prior written permission. 18*86d7f5d3SJohn Marino.\" 19*86d7f5d3SJohn Marino.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20*86d7f5d3SJohn Marino.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21*86d7f5d3SJohn Marino.\" LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 22*86d7f5d3SJohn Marino.\" FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 23*86d7f5d3SJohn Marino.\" COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 24*86d7f5d3SJohn Marino.\" INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 25*86d7f5d3SJohn Marino.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 26*86d7f5d3SJohn Marino.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 27*86d7f5d3SJohn Marino.\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 28*86d7f5d3SJohn Marino.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 29*86d7f5d3SJohn Marino.\" OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30*86d7f5d3SJohn Marino.\" SUCH DAMAGE. 31*86d7f5d3SJohn Marino.\" 32*86d7f5d3SJohn Marino.Dd December 14, 2009 33*86d7f5d3SJohn Marino.Dt VCOUNT 9 34*86d7f5d3SJohn Marino.Os 35*86d7f5d3SJohn Marino.Sh NAME 36*86d7f5d3SJohn Marino.Nm vcount , 37*86d7f5d3SJohn Marino.Nm count_dev 38*86d7f5d3SJohn Marino.Nd "get total number of references to a device" 39*86d7f5d3SJohn Marino.Sh SYNOPSIS 40*86d7f5d3SJohn Marino.In sys/conf.h 41*86d7f5d3SJohn Marino.In sys/vnode.h 42*86d7f5d3SJohn Marino.Ft int 43*86d7f5d3SJohn Marino.Fn vcount "struct vnode *vp" 44*86d7f5d3SJohn Marino.Ft int 45*86d7f5d3SJohn Marino.Fn count_dev "cdev_t dev" 46*86d7f5d3SJohn Marino.Sh DESCRIPTION 47*86d7f5d3SJohn Marino.Fn vcount 48*86d7f5d3SJohn Marinois used to get the number of references to a special device. 49*86d7f5d3SJohn MarinoThis makes sense because multiple vnodes may reference the same device. 50*86d7f5d3SJohn Marino.Pp 51*86d7f5d3SJohn Marino.Fn count_dev 52*86d7f5d3SJohn Marinodoes the same thing as 53*86d7f5d3SJohn Marino.Fn vcount , 54*86d7f5d3SJohn Marinobut takes a 55*86d7f5d3SJohn Marino.Vt cdev_t 56*86d7f5d3SJohn Marinorather than a 57*86d7f5d3SJohn Marino.Vt "struct vnode" 58*86d7f5d3SJohn Marinopointer as an argument. 59*86d7f5d3SJohn MarinoIt may only be called for 60*86d7f5d3SJohn Marino.Dv VBLK 61*86d7f5d3SJohn Marinoand 62*86d7f5d3SJohn Marino.Dv VCHR 63*86d7f5d3SJohn Marinovnodes since 64*86d7f5d3SJohn Marino.Fa v_rdev 65*86d7f5d3SJohn Marinois an overloaded field. 66*86d7f5d3SJohn Marino.Sh RETURN VALUES 67*86d7f5d3SJohn Marino.Fn vcount 68*86d7f5d3SJohn Marinoand 69*86d7f5d3SJohn Marino.Fn count_dev 70*86d7f5d3SJohn Marinoboth return the number of references to the device. 71*86d7f5d3SJohn Marino.Sh SEE ALSO 72*86d7f5d3SJohn Marino.Xr vnode 9 73