SUNRPC: Deal with the lack of a SYN_SENT sk->sk_state_change callback...

The TCP connection state code depends on the state_change() callback
being called when the SYN_SENT state is set. However the networking layer
doesn't actually call us back in that case.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@kernel.org

1 files changed, 13 insertions, 3 deletions

diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index bf005d3c65ef..f34f5ab341a3 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -1344,7 +1344,6 @@ static void xs_tcp_state_change(struct sock *sk)
         case TCP_CLOSE_WAIT:
                 /* The server initiated a shutdown of the socket */
                 xprt_force_disconnect(xprt);
-        case TCP_SYN_SENT:
                 xprt->connect_cookie++;
         case TCP_CLOSING:
                 /*
@@ -1758,6 +1757,7 @@ static void xs_tcp_reuse_connection(struct sock_xprt *transport)
 static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock)
 {
         struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
+        int ret = -ENOTCONN;
 
         if (!transport->inet) {
                 struct sock *sk = sock->sk;
@@ -1789,12 +1789,22 @@ static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock)
         }
 
         if (!xprt_bound(xprt))
-                return -ENOTCONN;
+                goto out;
 
         /* Tell the socket layer to start connecting... */
         xprt->stat.connect_count++;
         xprt->stat.connect_start = jiffies;
-        return kernel_connect(sock, xs_addr(xprt), xprt->addrlen, O_NONBLOCK);
+        ret = kernel_connect(sock, xs_addr(xprt), xprt->addrlen, O_NONBLOCK);
+        switch (ret) {
+        case 0:
+        case -EINPROGRESS:
+                /* SYN_SENT! */
+                xprt->connect_cookie++;
+                if (xprt->reestablish_timeout < XS_TCP_INIT_REEST_TO)
+                        xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO;
+        }
+out:
+        return ret;
 }
 
 /**