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 a vnode.
- 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
().
SEE ALSO¶
vget(9),
vnode(9),
vput(9),
vrefcnt(9),
vrele(9)
AUTHORS¶
This manual page was written by
Doug
Rabson.