1 files changed, 29 insertions, 16 deletions

diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index 43c57124de52..67474470320c 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -606,7 +606,8 @@ int svc_port_is_privileged(struct sockaddr *sin)
 }
 
 /*
- * Make sure that we don't have too many active connections. If we have,
+ * Make sure that we don't have too many connections that have not yet
+ * demonstrated that they have access to the NFS server. If we have,
  * something must be dropped. It's not clear what will happen if we allow
  * "too many" connections, but when dealing with network-facing software,
  * we have to code defensively. Here we do that by imposing hard limits.
@@ -625,27 +626,25 @@ int svc_port_is_privileged(struct sockaddr *sin)
  */
 static void svc_check_conn_limits(struct svc_serv *serv)
 {
-	unsigned int limit = serv->sv_maxconn ? serv->sv_maxconn :
-				(serv->sv_nrthreads+3) * 20;
+	unsigned int limit = serv->sv_maxconn ? serv->sv_maxconn : 64;
 
 	if (serv->sv_tmpcnt > limit) {
-		struct svc_xprt *xprt = NULL;
+		struct svc_xprt *xprt = NULL, *xprti;
 		spin_lock_bh(&serv->sv_lock);
 		if (!list_empty(&serv->sv_tempsocks)) {
-			/* Try to help the admin */
-			net_notice_ratelimited("%s: too many open connections, consider increasing the %s\n",
-					       serv->sv_name, serv->sv_maxconn ?
-					       "max number of connections" :
-					       "number of threads");
 			/*
 			 * Always select the oldest connection. It's not fair,
-			 * but so is life
+			 * but nor is life.
 			 */
-			xprt = list_entry(serv->sv_tempsocks.prev,
-					  struct svc_xprt,
-					  xpt_list);
-			set_bit(XPT_CLOSE, &xprt->xpt_flags);
-			svc_xprt_get(xprt);
+			list_for_each_entry_reverse(xprti, &serv->sv_tempsocks,
+						    xpt_list) {
+				if (!test_bit(XPT_PEER_VALID, &xprti->xpt_flags)) {
+					xprt = xprti;
+					set_bit(XPT_CLOSE, &xprt->xpt_flags);
+					svc_xprt_get(xprt);
+					break;
+				}
+			}
 		}
 		spin_unlock_bh(&serv->sv_lock);
 
@@ -1029,6 +1028,19 @@ static void svc_delete_xprt(struct svc_xprt *xprt)
 	struct svc_serv	*serv = xprt->xpt_server;
 	struct svc_deferred_req *dr;
 
+	/* unregister with rpcbind for when transport type is TCP or UDP.
+	 */
+	if (test_bit(XPT_RPCB_UNREG, &xprt->xpt_flags)) {
+		struct svc_sock *svsk = container_of(xprt, struct svc_sock,
+						     sk_xprt);
+		struct socket *sock = svsk->sk_sock;
+
+		if (svc_register(serv, xprt->xpt_net, sock->sk->sk_family,
+				 sock->sk->sk_protocol, 0) < 0)
+			pr_warn("failed to unregister %s with rpcbind\n",
+				xprt->xpt_class->xcl_name);
+	}
+
 	if (test_and_set_bit(XPT_DEAD, &xprt->xpt_flags))
 		return;
 
@@ -1039,7 +1051,8 @@ static void svc_delete_xprt(struct svc_xprt *xprt)
 
 	spin_lock_bh(&serv->sv_lock);
 	list_del_init(&xprt->xpt_list);
-	if (test_bit(XPT_TEMP, &xprt->xpt_flags))
+	if (test_bit(XPT_TEMP, &xprt->xpt_flags) &&
+	    !test_bit(XPT_PEER_VALID, &xprt->xpt_flags))
 		serv->sv_tmpcnt--;
 	spin_unlock_bh(&serv->sv_lock);