Function vnode_init

freebsd/kern/vfs_subr.c:533–574

* Initialize a vnode as it first enters the zone. */

 * Initialize a vnode as it first enters the zone.
 */
static int
vnode_init(void *mem, int size, int flags)
{
	struct vnode *vp;

	vp = mem;
	bzero(vp, size);
	/*
	 * Setup locks.
	 */
	vp->v_vnlock = &vp->v_lock;
	mtx_init(&vp->v_interlock, "vnode interlock", NULL, MTX_DEF);
	/*
	 * By default, don't allow shared locks unless filesystems opt-in.
	 */
	lockinit(vp->v_vnlock, PVFS, "vnode", VLKTIMEOUT,
	    LK_NOSHARE | LK_IS_VNODE);
	/*
	 * Initialize bufobj.
	 */
	bufobj_init(&vp->v_bufobj, vp);
	/*
	 * Initialize namecache.
	 */
	cache_vnode_init(vp);
	/*
	 * Initialize rangelocks.
	 */
	rangelock_init(&vp->v_rl);

	vp->v_dbatchcpu = NOCPU;

	/*
	 * Check vhold_recycle_free for an explanation.
	 */
	vp->v_holdcnt = VHOLD_NO_SMR;
	vp->v_type = VNON;
	mtx_lock(&vnode_list_mtx);
	TAILQ_INSERT_BEFORE(vnode_list_free_marker, vp, v_vnodelist);
	mtx_unlock(&vnode_list_mtx);
	return (0);
}

/*
 * Free a vnode when it is cleared from the zone.