NAME

SYNOPSIS

void
vref(struct vnode *vp);

void
vrefl(struct vnode *vp);

DESCRIPTION

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() or vrefl().

vref() locks the vnode interlock while vrefl() expects the interlock to already be held.

SEE ALSO

AUTHORS