mac_vnode_check_write
if (mac_vnode_check_write(alq->aq_cred, NOCRED, vp) == 0)
error = mac_vnode_check_write(cred, NOCRED, vp);
error = mac_vnode_check_write(td->td_ucred, NOCRED, vp);
error = mac_vnode_check_write(active_cred, fp->f_cred, vp);
error = mac_vnode_check_write(active_cred, fp->f_cred, vp);
error = mac_vnode_check_write(curthread->td_ucred,
error = mac_vnode_check_write(td->td_ucred, fp->f_cred, vp);
error = mac_vnode_check_write(active_cred, file_cred,
error = mac_vnode_check_write(active_cred, file_cred,