dumpvp
vp = dumpvp(kd, vp, 0, NULL);
vp = dumpvp(kd, vp, 0,
vp = dumpvp(kd, vp, 1, vfc.vfc_name);
static struct vnode *dumpvp(kvm_t *kd, struct vnode *vp, int whichlist, char *vfc_name);