1 files changed, 32 insertions, 18 deletions

diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index b507cd327d9b..c24a8ff33f8f 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -446,15 +446,43 @@ static void svc_write_space(struct sock *sk)
         }
 }
 
+static int svc_tcp_has_wspace(struct svc_xprt *xprt)
+{
+        struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
+        struct svc_serv *serv = svsk->sk_xprt.xpt_server;
+        int required;
+
+        if (test_bit(XPT_LISTENER, &xprt->xpt_flags))
+                return 1;
+        required = atomic_read(&xprt->xpt_reserved) + serv->sv_max_mesg;
+        if (sk_stream_wspace(svsk->sk_sk) >= required ||
+            (sk_stream_min_wspace(svsk->sk_sk) == 0 &&
+             atomic_read(&xprt->xpt_reserved) == 0))
+                return 1;
+        set_bit(SOCK_NOSPACE, &svsk->sk_sock->flags);
+        return 0;
+}
+
 static void svc_tcp_write_space(struct sock *sk)
 {
+        struct svc_sock *svsk = (struct svc_sock *)(sk->sk_user_data);
         struct socket *sock = sk->sk_socket;
 
-        if (sk_stream_is_writeable(sk) && sock)
+        if (!sk_stream_is_writeable(sk) || !sock)
+                return;
+        if (!svsk || svc_tcp_has_wspace(&svsk->sk_xprt))
                 clear_bit(SOCK_NOSPACE, &sock->flags);
         svc_write_space(sk);
 }
 
+static void svc_tcp_adjust_wspace(struct svc_xprt *xprt)
+{
+        struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
+
+        if (svc_tcp_has_wspace(xprt))
+                clear_bit(SOCK_NOSPACE, &svsk->sk_sock->flags);
+}
+
 /*
  * See net/ipv6/ip_sockglue.c : ip_cmsg_recv_pktinfo
  */
@@ -692,6 +720,7 @@ static struct svc_xprt_class svc_udp_class = {
         .xcl_owner = THIS_MODULE,
         .xcl_ops = &svc_udp_ops,
         .xcl_max_payload = RPCSVC_MAXPAYLOAD_UDP,
+        .xcl_ident = XPRT_TRANSPORT_UDP,
 };
 
 static void svc_udp_init(struct svc_sock *svsk, struct svc_serv *serv)
@@ -1197,23 +1226,6 @@ static void svc_tcp_prep_reply_hdr(struct svc_rqst *rqstp)
         svc_putnl(resv, 0);
 }
 
-static int svc_tcp_has_wspace(struct svc_xprt *xprt)
-{
-        struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
-        struct svc_serv *serv = svsk->sk_xprt.xpt_server;
-        int required;
-
-        if (test_bit(XPT_LISTENER, &xprt->xpt_flags))
-                return 1;
-        required = atomic_read(&xprt->xpt_reserved) + serv->sv_max_mesg;
-        if (sk_stream_wspace(svsk->sk_sk) >= required ||
-            (sk_stream_min_wspace(svsk->sk_sk) == 0 &&
-             atomic_read(&xprt->xpt_reserved) == 0))
-                return 1;
-        set_bit(SOCK_NOSPACE, &svsk->sk_sock->flags);
-        return 0;
-}
-
 static struct svc_xprt *svc_tcp_create(struct svc_serv *serv,
                                        struct net *net,
                                        struct sockaddr *sa, int salen,
@@ -1285,6 +1297,7 @@ static struct svc_xprt_ops svc_tcp_ops = {
         .xpo_has_wspace = svc_tcp_has_wspace,
         .xpo_accept = svc_tcp_accept,
         .xpo_secure_port = svc_sock_secure_port,
+        .xpo_adjust_wspace = svc_tcp_adjust_wspace,
 };
 
 static struct svc_xprt_class svc_tcp_class = {
@@ -1292,6 +1305,7 @@ static struct svc_xprt_class svc_tcp_class = {
         .xcl_owner = THIS_MODULE,
         .xcl_ops = &svc_tcp_ops,
         .xcl_max_payload = RPCSVC_MAXPAYLOAD_TCP,
+        .xcl_ident = XPRT_TRANSPORT_TCP,
 };
 
 void svc_init_xprt_sock(void)