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Command: vref | Section: 9 | Source: OpenBSD | File: vref.9
VREF(9) FreeBSD Kernel Developer's 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.
FreeBSD 14.1-RELEASE-p8 June 4, 2013 FreeBSD 14.1-RELEASE-p8