VREF(9) | 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.

June 4, 2013 | Debian