Conserve sockets: Reuse RPC transports.

[nfs-utils.git] / support / nfs / rpcmisc.c

diff --git a/support/nfs/rpcmisc.c b/support/nfs/rpcmisc.c
index 7b182fd51ab7ab1f6147ae451b87c801eb960de7..b994fb1361fd19e25e4296446ee128e2feccaaf2 100644 (file)
--- a/support/nfs/rpcmisc.c
+++ b/support/nfs/rpcmisc.c
@@ -65,35 +65,53 @@ rpc_init(char *name, int prog, int vers, void (*dispatch)(), int defport,
        }
 
        if ((_rpcfdtype == 0) || (_rpcfdtype == SOCK_DGRAM)) {
-               if (_rpcfdtype == 0 && defport != 0 &&
-                   ((sock = makesock(defport, IPPROTO_UDP, bufsiz)) < 0)) {
-                       xlog(L_FATAL, "%s: could not make a UDP socket\n",
-                                       name);
+               static SVCXPRT *last_transp = NULL;
+ 
+               if (_rpcfdtype == 0 && defport != 0) {
+                       if (last_transp && last_transp->xp_port == defport) {
+                               transp = last_transp;
+                               goto udp_transport;
+                       }
+                       if ((sock = makesock(defport, IPPROTO_UDP, bufsiz)) < 0) {
+                               xlog(L_FATAL, "%s: cannot make a UDP socket\n",
+                                               name);
+                       }
                }
                transp = svcudp_create(sock);
                if (transp == NULL) {
                        xlog(L_FATAL, "cannot create udp service.");
                }
+      udp_transport:
                if (!svc_register(transp, prog, vers, dispatch, IPPROTO_UDP)) {
                        xlog(L_FATAL, "unable to register (%s, %d, udp).",
                                        name, vers);
                }
+               last_transp = transp;
        }
 
        if ((_rpcfdtype == 0) || (_rpcfdtype == SOCK_STREAM)) {
-               if (_rpcfdtype == 0 && defport != 0 &&
-                   ((sock = makesock(defport, IPPROTO_TCP, bufsiz)) < 0)) {
-                       xlog(L_FATAL, "%s: could not make a TCP socket\n",
-                                       name);
+               static SVCXPRT *last_transp = NULL;
+
+               if (_rpcfdtype == 0 && defport != 0) {
+                       if (last_transp && last_transp->xp_port == defport) {
+                               transp = last_transp;
+                               goto tcp_transport;
+                       }
+                       if ((sock = makesock(defport, IPPROTO_TCP, bufsiz)) < 0) {
+                               xlog(L_FATAL, "%s: cannot make a TCP socket\n",
+                                               name);
+                       }
                }
                transp = svctcp_create(sock, 0, 0);
                if (transp == NULL) {
                        xlog(L_FATAL, "cannot create tcp service.");
                }
+      tcp_transport:
                if (!svc_register(transp, prog, vers, dispatch, IPPROTO_TCP)) {
                        xlog(L_FATAL, "unable to register (%s, %d, tcp).",
                                        name, vers);
                }
+               last_transp = transp;
        }
 
        if (_rpcpmstart) {