vref man page on OpenBSD

vref man page on OpenBSD

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VREF(9)			     OpenBSD Kernel Manual		       VREF(9)

NAME
     vref - increment the use count for a vnode

SYNOPSIS
     #include <sys/param.h>
     #include <sys/vnode.h>

     void
     vref(struct vnode *vp);

DESCRIPTION
     Increment the v_usecount field of the vnode specified by vp.

     Each vnode maintains a reference count of how many parts of the system
     are using the vnode.  This allows the system to detect when a vnode is no
     longer being used and can be safely recycled for a different file.

     Any code in the system which uses a vnode (e.g. during the operation of
     some algorithm or to store in a data structure) should call vref().

SEE ALSO
     vget(9), vnode(9), vput(9), vrele(9)

AUTHORS
     This man page was originally written by Doug Rabson for FreeBSD.

OpenBSD 4.9		       October 28, 2010			   OpenBSD 4.9

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