749 static struct rpc_cred *get_backchannel_cred(struct nfs4_client *clp, struct rpc_clnt *client, stru…  in get_backchannel_cred()  argument
751 	if (clp->cl_minorversion == 0) {  in get_backchannel_cred()
752 		char *principal = clp->cl_cred.cr_targ_princ ?  in get_backchannel_cred()
753 					clp->cl_cred.cr_targ_princ : "nfs";  in get_backchannel_cred()
770 static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *conn, struct nfsd4_s…  in setup_callback_client()  argument
772 	int maxtime = max_cb_time(clp->net);  in setup_callback_client()
779 		.net		= clp->net,  in setup_callback_client()
791 	if (clp->cl_minorversion == 0) {  in setup_callback_client()
792 		if (!clp->cl_cred.cr_principal &&  in setup_callback_client()
793 				(clp->cl_cred.cr_flavor >= RPC_AUTH_GSS_KRB5))  in setup_callback_client()
795 		args.client_name = clp->cl_cred.cr_principal;  in setup_callback_client()
798 		args.authflavor = clp->cl_cred.cr_flavor;  in setup_callback_client()
799 		clp->cl_cb_ident = conn->cb_ident;  in setup_callback_client()
803 		clp->cl_cb_conn.cb_xprt = conn->cb_xprt;  in setup_callback_client()
804 		clp->cl_cb_session = ses;  in setup_callback_client()
806 		args.prognumber = clp->cl_cb_session->se_cb_prog;  in setup_callback_client()
818 	cred = get_backchannel_cred(clp, client, ses);  in setup_callback_client()
823 	clp->cl_cb_client = client;  in setup_callback_client()
824 	clp->cl_cb_cred = cred;  in setup_callback_client()
828 static void warn_no_callback_path(struct nfs4_client *clp, int reason)  in warn_no_callback_path()  argument
831 		(int)clp->cl_name.len, clp->cl_name.data, reason);  in warn_no_callback_path()
834 static void nfsd4_mark_cb_down(struct nfs4_client *clp, int reason)  in nfsd4_mark_cb_down()  argument
836 	if (test_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags))  in nfsd4_mark_cb_down()
838 	clp->cl_cb_state = NFSD4_CB_DOWN;  in nfsd4_mark_cb_down()
839 	warn_no_callback_path(clp, reason);  in nfsd4_mark_cb_down()
842 static void nfsd4_mark_cb_fault(struct nfs4_client *clp, int reason)  in nfsd4_mark_cb_fault()  argument
844 	if (test_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags))  in nfsd4_mark_cb_fault()
846 	clp->cl_cb_state = NFSD4_CB_FAULT;  in nfsd4_mark_cb_fault()
847 	warn_no_callback_path(clp, reason);  in nfsd4_mark_cb_fault()
852 	struct nfs4_client *clp = container_of(calldata, struct nfs4_client, cl_cb_null);  in nfsd4_cb_probe_done()  local
855 		nfsd4_mark_cb_down(clp, task->tk_status);  in nfsd4_cb_probe_done()
857 		clp->cl_cb_state = NFSD4_CB_UP;  in nfsd4_cb_probe_done()
872 void nfsd4_probe_callback(struct nfs4_client *clp)  in nfsd4_probe_callback()  argument
874 	clp->cl_cb_state = NFSD4_CB_UNKNOWN;  in nfsd4_probe_callback()
875 	set_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags);  in nfsd4_probe_callback()
876 	nfsd4_run_cb(&clp->cl_cb_null);  in nfsd4_probe_callback()
879 void nfsd4_probe_callback_sync(struct nfs4_client *clp)  in nfsd4_probe_callback_sync()  argument
881 	nfsd4_probe_callback(clp);  in nfsd4_probe_callback_sync()
885 void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *conn)  in nfsd4_change_callback()  argument
887 	clp->cl_cb_state = NFSD4_CB_UNKNOWN;  in nfsd4_change_callback()
888 	spin_lock(&clp->cl_lock);  in nfsd4_change_callback()
889 	memcpy(&clp->cl_cb_conn, conn, sizeof(struct nfs4_cb_conn));  in nfsd4_change_callback()
890 	spin_unlock(&clp->cl_lock);  in nfsd4_change_callback()
898 static bool nfsd41_cb_get_slot(struct nfs4_client *clp, struct rpc_task *task)  in nfsd41_cb_get_slot()  argument
900 	if (test_and_set_bit(0, &clp->cl_cb_slot_busy) != 0) {  in nfsd41_cb_get_slot()
901 		rpc_sleep_on(&clp->cl_cb_waitq, task, NULL);  in nfsd41_cb_get_slot()
903 		if (test_and_set_bit(0, &clp->cl_cb_slot_busy) != 0) {  in nfsd41_cb_get_slot()
907 		rpc_wake_up_queued_task(&clp->cl_cb_waitq, task);  in nfsd41_cb_get_slot()
919 	struct nfs4_client *clp = cb->cb_clp;  in nfsd4_cb_prepare()  local
920 	u32 minorversion = clp->cl_minorversion;  in nfsd4_cb_prepare()
929 		if (!nfsd41_cb_get_slot(clp, task))  in nfsd4_cb_prepare()
937 	struct nfs4_client *clp = cb->cb_clp;  in nfsd4_cb_sequence_done()  local
938 	struct nfsd4_session *session = clp->cl_cb_session;  in nfsd4_cb_sequence_done()
941 	if (!clp->cl_minorversion) {  in nfsd4_cb_sequence_done()
995 	clear_bit(0, &clp->cl_cb_slot_busy);  in nfsd4_cb_sequence_done()
996 	rpc_wake_up_next(&clp->cl_cb_waitq);  in nfsd4_cb_sequence_done()
998 		clp->cl_cb_session->se_cb_seq_nr);  in nfsd4_cb_sequence_done()
1017 	struct nfs4_client *clp = cb->cb_clp;  in nfsd4_cb_done()  local
1020 		clp->cl_minorversion);  in nfsd4_cb_done()
1039 		nfsd4_mark_cb_down(clp, task->tk_status);  in nfsd4_cb_done()
1077 void nfsd4_shutdown_callback(struct nfs4_client *clp)  in nfsd4_shutdown_callback()  argument
1079 	set_bit(NFSD4_CLIENT_CB_KILL, &clp->cl_flags);  in nfsd4_shutdown_callback()
1085 	nfsd4_run_cb(&clp->cl_cb_null);  in nfsd4_shutdown_callback()
1090 static struct nfsd4_conn * __nfsd4_find_backchannel(struct nfs4_client *clp)  in __nfsd4_find_backchannel()  argument
1095 	list_for_each_entry(s, &clp->cl_sessions, se_perclnt) {  in __nfsd4_find_backchannel()
1107 	struct nfs4_client *clp = cb->cb_clp;  in nfsd4_process_cb_update()  local
1116 	if (clp->cl_cb_client) {  in nfsd4_process_cb_update()
1117 		rpc_shutdown_client(clp->cl_cb_client);  in nfsd4_process_cb_update()
1118 		clp->cl_cb_client = NULL;  in nfsd4_process_cb_update()
1119 		put_rpccred(clp->cl_cb_cred);  in nfsd4_process_cb_update()
1120 		clp->cl_cb_cred = NULL;  in nfsd4_process_cb_update()
1122 	if (clp->cl_cb_conn.cb_xprt) {  in nfsd4_process_cb_update()
1123 		svc_xprt_put(clp->cl_cb_conn.cb_xprt);  in nfsd4_process_cb_update()
1124 		clp->cl_cb_conn.cb_xprt = NULL;  in nfsd4_process_cb_update()
1126 	if (test_bit(NFSD4_CLIENT_CB_KILL, &clp->cl_flags))  in nfsd4_process_cb_update()
1128 	spin_lock(&clp->cl_lock);  in nfsd4_process_cb_update()
1133 	BUG_ON(!(clp->cl_flags & NFSD4_CLIENT_CB_FLAG_MASK));  in nfsd4_process_cb_update()
1134 	clear_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags);  in nfsd4_process_cb_update()
1136 	c = __nfsd4_find_backchannel(clp);  in nfsd4_process_cb_update()
1142 	spin_unlock(&clp->cl_lock);  in nfsd4_process_cb_update()
1144 	err = setup_callback_client(clp, &conn, ses);  in nfsd4_process_cb_update()
1146 		nfsd4_mark_cb_down(clp, err);  in nfsd4_process_cb_update()
1156 	struct nfs4_client *clp = cb->cb_clp;  in nfsd4_run_cb_work()  local
1166 	if (clp->cl_flags & NFSD4_CLIENT_CB_FLAG_MASK)  in nfsd4_run_cb_work()
1169 	clnt = clp->cl_cb_client;  in nfsd4_run_cb_work()
1180 	if (!cb->cb_ops && clp->cl_minorversion) {  in nfsd4_run_cb_work()
1181 		clp->cl_cb_state = NFSD4_CB_UP;  in nfsd4_run_cb_work()
1185 	cb->cb_msg.rpc_cred = clp->cl_cb_cred;  in nfsd4_run_cb_work()
1190 void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,  in nfsd4_init_cb()  argument
1193 	cb->cb_clp = clp;  in nfsd4_init_cb()