DEFINE_NFSD_CB_EVENT
DEFINE_NFSD_CB_EVENT(start);
DEFINE_NFSD_CB_EVENT(new_state);
DEFINE_NFSD_CB_EVENT(probe);
DEFINE_NFSD_CB_EVENT(lost);
DEFINE_NFSD_CB_EVENT(shutdown);
DEFINE_NFSD_CB_EVENT(rpc_prepare);
DEFINE_NFSD_CB_EVENT(rpc_done);
DEFINE_NFSD_CB_EVENT(rpc_release);