NAME    [Toc]    [Back]

     vref - increment the use count for a vnode

SYNOPSIS    [Toc]    [Back]

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

     void
     vref(struct vnode *vp);

DESCRIPTION    [Toc]    [Back]

     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    [Toc]    [Back]

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

AUTHORS    [Toc]    [Back]

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

OpenBSD      3.6                           July      24,     1996