v_fifoinfo
if ((fip = vp->v_fifoinfo) == NULL) {
vp->v_fifoinfo = fip;
vp->v_fifoinfo = NULL;
struct socket *rso = vp->v_fifoinfo->fi_readsock;
struct socket *wso = vp->v_fifoinfo->fi_writesock;
filetmp.f_data = vp->v_fifoinfo->fi_readsock;
filetmp.f_data = vp->v_fifoinfo->fi_writesock;
struct fifoinfo *fi = vp->v_fifoinfo;
struct socket *so = vp->v_fifoinfo->fi_readsock;
struct socket *so = vp->v_fifoinfo->fi_readsock;
struct socket *so = vp->v_fifoinfo->fi_writesock;
struct socket *so = vp->v_fifoinfo->fi_writesock;
fip = vp->v_fifoinfo;
vp->v_fifoinfo = NULL;
struct fifoinfo *fip = vp->v_fifoinfo;