NAME
vhold, vdrop,
vdropl —
acquire/release a hold on a
vnode
SYNOPSIS
#include
<sys/param.h>
#include <sys/vnode.h>
void
vhold(struct
vnode *vp);
void
vholdl(struct
vnode *vp);
void
vdrop(struct
vnode *vp);
void
vdropl(struct
vnode *vp);
DESCRIPTION
Thevhold()
and
vholdl()
functions increment the v_holdcnt of the given vnode. If
the vnode has already been added to the free list and is still referenced, it
will be removed.
The
vdrop() and
vdropl()
functions decrement the v_holdcnt of the vnode. If the
holdcount is less than or equal to zero prior to calling
vdrop() or vdropl(), the
system will panic. If the vnode is no longer referenced, it will be
freed.
vhold()
and vdrop() lock the vnode interlock while
vholdl() and vdropl() expect
the interlock to already be held.
SEE ALSO
AUTHORS
This manual page was written by Chad David <davidc@acns.ab.ca>.