+int setup_callback_client(struct nfs4_client *clp)
+{
+ struct nfs4_cb_conn *cb = &clp->cl_cb_conn;
+ struct rpc_timeout timeparms = {
+ .to_initval = max_cb_time(),
+ .to_retries = 0,
+ };
+ struct rpc_create_args args = {
+ .protocol = XPRT_TRANSPORT_TCP,
+ .address = (struct sockaddr *) &cb->cb_addr,
+ .addrsize = cb->cb_addrlen,
+ .timeout = &timeparms,
+ .program = &cb_program,
+ .prognumber = cb->cb_prog,
+ .version = nfs_cb_version[1]->number,
+ .authflavor = clp->cl_flavor,
+ .flags = (RPC_CLNT_CREATE_NOPING | RPC_CLNT_CREATE_QUIET),
+ .client_name = clp->cl_principal,
+ };
+ struct rpc_clnt *client;
+
+ if (!clp->cl_principal && (clp->cl_flavor >= RPC_AUTH_GSS_KRB5))
+ return -EINVAL;
+ if (cb->cb_minorversion) {
+ args.bc_xprt = clp->cl_cb_xprt;
+ args.protocol = XPRT_TRANSPORT_BC_TCP;
+ }
+ /* Create RPC client */
+ client = rpc_create(&args);
+ if (IS_ERR(client)) {
+ dprintk("NFSD: couldn't create callback client: %ld\n",
+ PTR_ERR(client));
+ return PTR_ERR(client);
+ }
+ cb->cb_client = client;
+ return 0;
+
+}
+
+static void warn_no_callback_path(struct nfs4_client *clp, int reason)