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 a vnode.

vp the vnode to increment

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 is using 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 manual page was written by Doug Rabson.

BSD July 24, 1996

BSD