+static int nfs_callback_start_svc(int minorversion, struct rpc_xprt *xprt,
+ struct svc_serv *serv)
+{
+ struct svc_rqst *rqstp;
+ int (*callback_svc)(void *vrqstp);
+ struct nfs_callback_data *cb_info = &nfs_callback_info[minorversion];
+ char svc_name[12];
+ int ret;
+ int minorversion_setup;
+
+ nfs_callback_bc_serv(minorversion, xprt, serv);
+
+ minorversion_setup = nfs_minorversion_callback_svc_setup(minorversion,
+ serv, &rqstp, &callback_svc);
+ if (!minorversion_setup) {
+ /* v4.0 callback setup */
+ rqstp = nfs4_callback_up(serv);
+ callback_svc = nfs4_callback_svc;
+ }
+
+ if (IS_ERR(rqstp))
+ return PTR_ERR(rqstp);
+
+ svc_sock_update_bufs(serv);
+
+ sprintf(svc_name, "nfsv4.%u-svc", minorversion);
+ cb_info->serv = serv;
+ cb_info->rqst = rqstp;
+ cb_info->task = kthread_run(callback_svc, cb_info->rqst, svc_name);
+ if (IS_ERR(cb_info->task)) {
+ ret = PTR_ERR(cb_info->task);
+ svc_exit_thread(cb_info->rqst);
+ cb_info->rqst = NULL;
+ cb_info->task = NULL;
+ return PTR_ERR(cb_info->task);
+ }
+ dprintk("nfs_callback_up: service started\n");
+ return 0;
+}
+