699 static struct rpc_cred *get_backchannel_cred(struct nfs4_client *clp, struct rpc_clnt *client, stru…  in get_backchannel_cred()  argument
701 	if (clp->cl_minorversion == 0) {  in get_backchannel_cred()
729 static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *conn, struct nfsd4_s…  in setup_callback_client()  argument
731 	int maxtime = max_cb_time(clp->net);  in setup_callback_client()
738 		.net		= clp->net,  in setup_callback_client()
750 	if (clp->cl_minorversion == 0) {  in setup_callback_client()
751 		if (!clp->cl_cred.cr_principal &&  in setup_callback_client()
752 				(clp->cl_cred.cr_flavor >= RPC_AUTH_GSS_KRB5))  in setup_callback_client()
754 		args.client_name = clp->cl_cred.cr_principal;  in setup_callback_client()
757 		args.authflavor = clp->cl_cred.cr_flavor;  in setup_callback_client()
758 		clp->cl_cb_ident = conn->cb_ident;  in setup_callback_client()
762 		clp->cl_cb_conn.cb_xprt = conn->cb_xprt;  in setup_callback_client()
763 		clp->cl_cb_session = ses;  in setup_callback_client()
765 		args.prognumber = clp->cl_cb_session->se_cb_prog;  in setup_callback_client()
777 	cred = get_backchannel_cred(clp, client, ses);  in setup_callback_client()
782 	clp->cl_cb_client = client;  in setup_callback_client()
783 	clp->cl_cb_cred = cred;  in setup_callback_client()
787 static void warn_no_callback_path(struct nfs4_client *clp, int reason)  in warn_no_callback_path()  argument
790 		(int)clp->cl_name.len, clp->cl_name.data, reason);  in warn_no_callback_path()
793 static void nfsd4_mark_cb_down(struct nfs4_client *clp, int reason)  in nfsd4_mark_cb_down()  argument
795 	clp->cl_cb_state = NFSD4_CB_DOWN;  in nfsd4_mark_cb_down()
796 	warn_no_callback_path(clp, reason);  in nfsd4_mark_cb_down()
799 static void nfsd4_mark_cb_fault(struct nfs4_client *clp, int reason)  in nfsd4_mark_cb_fault()  argument
801 	clp->cl_cb_state = NFSD4_CB_FAULT;  in nfsd4_mark_cb_fault()
802 	warn_no_callback_path(clp, reason);  in nfsd4_mark_cb_fault()
807 	struct nfs4_client *clp = container_of(calldata, struct nfs4_client, cl_cb_null);  in nfsd4_cb_probe_done()  local
810 		nfsd4_mark_cb_down(clp, task->tk_status);  in nfsd4_cb_probe_done()
812 		clp->cl_cb_state = NFSD4_CB_UP;  in nfsd4_cb_probe_done()
827 void nfsd4_probe_callback(struct nfs4_client *clp)  in nfsd4_probe_callback()  argument
829 	clp->cl_cb_state = NFSD4_CB_UNKNOWN;  in nfsd4_probe_callback()
830 	set_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags);  in nfsd4_probe_callback()
831 	nfsd4_run_cb(&clp->cl_cb_null);  in nfsd4_probe_callback()
834 void nfsd4_probe_callback_sync(struct nfs4_client *clp)  in nfsd4_probe_callback_sync()  argument
836 	nfsd4_probe_callback(clp);  in nfsd4_probe_callback_sync()
840 void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *conn)  in nfsd4_change_callback()  argument
842 	clp->cl_cb_state = NFSD4_CB_UNKNOWN;  in nfsd4_change_callback()
843 	spin_lock(&clp->cl_lock);  in nfsd4_change_callback()
844 	memcpy(&clp->cl_cb_conn, conn, sizeof(struct nfs4_cb_conn));  in nfsd4_change_callback()
845 	spin_unlock(&clp->cl_lock);  in nfsd4_change_callback()
853 static bool nfsd41_cb_get_slot(struct nfs4_client *clp, struct rpc_task *task)  in nfsd41_cb_get_slot()  argument
855 	if (test_and_set_bit(0, &clp->cl_cb_slot_busy) != 0) {  in nfsd41_cb_get_slot()
856 		rpc_sleep_on(&clp->cl_cb_waitq, task, NULL);  in nfsd41_cb_get_slot()
858 		if (test_and_set_bit(0, &clp->cl_cb_slot_busy) != 0) {  in nfsd41_cb_get_slot()
862 		rpc_wake_up_queued_task(&clp->cl_cb_waitq, task);  in nfsd41_cb_get_slot()
874 	struct nfs4_client *clp = cb->cb_clp;  in nfsd4_cb_prepare()  local
875 	u32 minorversion = clp->cl_minorversion;  in nfsd4_cb_prepare()
885 		if (!nfsd41_cb_get_slot(clp, task))  in nfsd4_cb_prepare()
893 	struct nfs4_client *clp = cb->cb_clp;  in nfsd4_cb_sequence_done()  local
894 	struct nfsd4_session *session = clp->cl_cb_session;  in nfsd4_cb_sequence_done()
897 	if (!clp->cl_minorversion) {  in nfsd4_cb_sequence_done()
950 	clear_bit(0, &clp->cl_cb_slot_busy);  in nfsd4_cb_sequence_done()
951 	rpc_wake_up_next(&clp->cl_cb_waitq);  in nfsd4_cb_sequence_done()
953 		clp->cl_cb_session->se_cb_seq_nr);  in nfsd4_cb_sequence_done()
972 	struct nfs4_client *clp = cb->cb_clp;  in nfsd4_cb_done()  local
975 		clp->cl_minorversion);  in nfsd4_cb_done()
994 		nfsd4_mark_cb_down(clp, task->tk_status);  in nfsd4_cb_done()
1032 void nfsd4_shutdown_callback(struct nfs4_client *clp)  in nfsd4_shutdown_callback()  argument
1034 	set_bit(NFSD4_CLIENT_CB_KILL, &clp->cl_flags);  in nfsd4_shutdown_callback()
1040 	nfsd4_run_cb(&clp->cl_cb_null);  in nfsd4_shutdown_callback()
1045 static struct nfsd4_conn * __nfsd4_find_backchannel(struct nfs4_client *clp)  in __nfsd4_find_backchannel()  argument
1050 	list_for_each_entry(s, &clp->cl_sessions, se_perclnt) {  in __nfsd4_find_backchannel()
1062 	struct nfs4_client *clp = cb->cb_clp;  in nfsd4_process_cb_update()  local
1071 	if (clp->cl_cb_client) {  in nfsd4_process_cb_update()
1072 		rpc_shutdown_client(clp->cl_cb_client);  in nfsd4_process_cb_update()
1073 		clp->cl_cb_client = NULL;  in nfsd4_process_cb_update()
1074 		put_rpccred(clp->cl_cb_cred);  in nfsd4_process_cb_update()
1075 		clp->cl_cb_cred = NULL;  in nfsd4_process_cb_update()
1077 	if (clp->cl_cb_conn.cb_xprt) {  in nfsd4_process_cb_update()
1078 		svc_xprt_put(clp->cl_cb_conn.cb_xprt);  in nfsd4_process_cb_update()
1079 		clp->cl_cb_conn.cb_xprt = NULL;  in nfsd4_process_cb_update()
1081 	if (test_bit(NFSD4_CLIENT_CB_KILL, &clp->cl_flags))  in nfsd4_process_cb_update()
1083 	spin_lock(&clp->cl_lock);  in nfsd4_process_cb_update()
1088 	BUG_ON(!(clp->cl_flags & NFSD4_CLIENT_CB_FLAG_MASK));  in nfsd4_process_cb_update()
1089 	clear_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags);  in nfsd4_process_cb_update()
1091 	c = __nfsd4_find_backchannel(clp);  in nfsd4_process_cb_update()
1097 	spin_unlock(&clp->cl_lock);  in nfsd4_process_cb_update()
1099 	err = setup_callback_client(clp, &conn, ses);  in nfsd4_process_cb_update()
1101 		nfsd4_mark_cb_down(clp, err);  in nfsd4_process_cb_update()
1111 	struct nfs4_client *clp = cb->cb_clp;  in nfsd4_run_cb_work()  local
1121 	if (clp->cl_flags & NFSD4_CLIENT_CB_FLAG_MASK)  in nfsd4_run_cb_work()
1124 	clnt = clp->cl_cb_client;  in nfsd4_run_cb_work()
1135 	if (!cb->cb_ops && clp->cl_minorversion) {  in nfsd4_run_cb_work()
1136 		clp->cl_cb_state = NFSD4_CB_UP;  in nfsd4_run_cb_work()
1140 	cb->cb_msg.rpc_cred = clp->cl_cb_cred;  in nfsd4_run_cb_work()
1145 void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,  in nfsd4_init_cb()  argument
1148 	cb->cb_clp = clp;  in nfsd4_init_cb()