+ /*
+ * Add a transport listener by writing it's transport name
+ */
+ if (isalpha(buf[0])) {
+ int err;
+ char transport[16];
+ int port;
+ if (sscanf(buf, "%15s %4d", transport, &port) == 2) {
+ err = nfsd_create_serv();
+ if (!err) {
+ err = svc_create_xprt(nfsd_serv,
+ transport, port,
+ SVC_SOCK_ANONYMOUS);
+ if (err == -ENOENT)
+ /* Give a reasonable perror msg for
+ * bad transport string */
+ err = -EPROTONOSUPPORT;
+ }
+ return err < 0 ? err : 0;
+ }
+ }
+ /*
+ * Remove a transport by writing it's transport name and port number
+ */
+ if (buf[0] == '-' && isalpha(buf[1])) {
+ struct svc_xprt *xprt;
+ int err = -EINVAL;
+ char transport[16];
+ int port;
+ if (sscanf(&buf[1], "%15s %4d", transport, &port) == 2) {
+ if (port == 0)
+ return -EINVAL;
+ lock_kernel();
+ if (nfsd_serv) {
+ xprt = svc_find_xprt(nfsd_serv, transport,
+ AF_UNSPEC, port);
+ if (xprt) {
+ svc_close_xprt(xprt);
+ svc_xprt_put(xprt);
+ err = 0;
+ } else
+ err = -ENOTCONN;
+ }
+ unlock_kernel();
+ return err < 0 ? err : 0;
+ }
+ }