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VREF.9freebsd

BSD mandoc

NAME

vref - increment the use count for a vnode

SYNOPSIS

In sys/param.h In sys/vnode.h Ft void Fn vref struct vnode *vp

DESCRIPTION

Increment the v_usecount field of a vnode.

Fa 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 Fn vref .

SEE ALSO

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

AUTHORS

This manual page was written by An Doug Rabson .