NAME

vhold, vdrop — acquire/release a hold on a vnode

SYNOPSIS

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

void
vhold(struct vnode *vp);

void
vdrop(struct vnode *vp);

DESCRIPTION

The vhold() function increments the v_holdcnt of the given vnode. If the vnode has already been added to the free list and its v_holdcnt and v_usecount are both zero, it will be removed from the free list and added to the vnode hold list.

The vdrop() function decrements the v_holdcnt of the given vnode. If the vnode is on the vnode hold list and its v_holdcnt and v_usecount are both zero, it will be removed from the vnode hold list and added to the freed list.

SEE ALSO

vnode(9)

AUTHORS

This man page was originally written by Chad David <davidc@acns.ab.ca> for FreeBSD.