SUNRPC: move saved socket callback functions to a private data structure

Move the three fields for saving socket callback functions out of the
rpc_xprt structure and into a private data structure maintained in
net/sunrpc/xprtsock.c.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 16 insertions, 9 deletions

diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index b804381d5bee..faa6bfebf258 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -157,6 +157,13 @@ struct sock_xprt {
          */
         size_t                  rcvsize,
                                 sndsize;
+
+        /*
+         * Saved socket callback addresses
+         */
+        void                    (*old_data_ready)(struct sock *, int);
+        void                    (*old_state_change)(struct sock *);
+        void                    (*old_write_space)(struct sock *);
 };
 
 /*
@@ -536,9 +543,9 @@ static void xs_close(struct rpc_xprt *xprt)
         transport->sock = NULL;
 
         sk->sk_user_data = NULL;
-        sk->sk_data_ready = xprt->old_data_ready;
-        sk->sk_state_change = xprt->old_state_change;
-        sk->sk_write_space = xprt->old_write_space;
+        sk->sk_data_ready = transport->old_data_ready;
+        sk->sk_state_change = transport->old_state_change;
+        sk->sk_write_space = transport->old_write_space;
         write_unlock_bh(&sk->sk_callback_lock);
 
         sk->sk_no_check = 0;
@@ -1147,9 +1154,9 @@ static void xs_udp_connect_worker(void *args)
                 write_lock_bh(&sk->sk_callback_lock);
 
                 sk->sk_user_data = xprt;
-                xprt->old_data_ready = sk->sk_data_ready;
-                xprt->old_state_change = sk->sk_state_change;
-                xprt->old_write_space = sk->sk_write_space;
+                transport->old_data_ready = sk->sk_data_ready;
+                transport->old_state_change = sk->sk_state_change;
+                transport->old_write_space = sk->sk_write_space;
                 sk->sk_data_ready = xs_udp_data_ready;
                 sk->sk_write_space = xs_udp_write_space;
                 sk->sk_no_check = UDP_CSUM_NORCV;
@@ -1234,9 +1241,9 @@ static void xs_tcp_connect_worker(void *args)
                 write_lock_bh(&sk->sk_callback_lock);
 
                 sk->sk_user_data = xprt;
-                xprt->old_data_ready = sk->sk_data_ready;
-                xprt->old_state_change = sk->sk_state_change;
-                xprt->old_write_space = sk->sk_write_space;
+                transport->old_data_ready = sk->sk_data_ready;
+                transport->old_state_change = sk->sk_state_change;
+                transport->old_write_space = sk->sk_write_space;
                 sk->sk_data_ready = xs_tcp_data_ready;
                 sk->sk_state_change = xs_tcp_state_change;
                 sk->sk_write_space = xs_tcp_write_space;