[PATCH] RPC: Add helper for waking tasks pending on a transport

 Clean-up: remove only reference to xprt->pending from the socket transport
 implementation.  This makes a cleaner interface for other transport
 implementations as well.

 Test-plan:
 Compile kernel with CONFIG_NFS enabled.

 Version: Thu, 11 Aug 2005 16:06:52 -0400

 Signed-off-by: Chuck Lever <cel@netapp.com>
 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

3 files changed, 19 insertions, 7 deletions

diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h
index 009a3bb4f997..d5223993fca9 100644
--- a/include/linux/sunrpc/xprt.h
+++ b/include/linux/sunrpc/xprt.h
@@ -232,6 +232,7 @@ void			xprt_reserve(struct rpc_task *);
 int                     xprt_prepare_transmit(struct rpc_task *);
 void                    xprt_transmit(struct rpc_task *);
 void                    xprt_receive(struct rpc_task *);
+void                    xprt_wake_pending_tasks(struct rpc_xprt *, int);
 int                     xprt_adjust_timeout(struct rpc_rqst *req);
 void                    xprt_release(struct rpc_task *);
 void                    xprt_connect(struct rpc_task *);
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 57c5e77b155e..2f9cd468b953 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -227,6 +227,20 @@ xprt_adjust_cwnd(struct rpc_xprt *xprt, int result)
         xprt->cwnd = cwnd;
 }
 
+/**
+ * xprt_wake_pending_tasks - wake all tasks on a transport's pending queue
+ * @xprt: transport with waiting tasks
+ * @status: result code to plant in each task before waking it
+ *
+ */
+void xprt_wake_pending_tasks(struct rpc_xprt *xprt, int status)
+{
+        if (status < 0)
+                rpc_wake_up_status(&xprt->pending, status);
+        else
+                rpc_wake_up(&xprt->pending);
+}
+
 static void xprt_reset_majortimeo(struct rpc_rqst *req)
 {
         struct rpc_timeout *to = &req->rq_xprt->timeout;
@@ -300,7 +314,7 @@ void xprt_disconnect(struct rpc_xprt *xprt)
         dprintk("RPC:      disconnected transport %p\n", xprt);
         spin_lock_bh(&xprt->transport_lock);
         xprt_clear_connected(xprt);
-        rpc_wake_up_status(&xprt->pending, -ENOTCONN);
+        xprt_wake_pending_tasks(xprt, -ENOTCONN);
         spin_unlock_bh(&xprt->transport_lock);
 }
 
@@ -803,7 +817,7 @@ static void xprt_shutdown(struct rpc_xprt *xprt)
         xprt->shutdown = 1;
         rpc_wake_up(&xprt->sending);
         rpc_wake_up(&xprt->resend);
-        rpc_wake_up(&xprt->pending);
+        xprt_wake_pending_tasks(xprt, -EIO);
         rpc_wake_up(&xprt->backlog);
         wake_up(&xprt->cong_wait);
         del_timer_sync(&xprt->timer);
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 76a33b54f436..182da2edf61c 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -703,7 +703,7 @@ static void xs_tcp_state_change(struct sock *sk)
                         xprt->tcp_reclen = 0;
                         xprt->tcp_copied = 0;
                         xprt->tcp_flags = XPRT_COPY_RECM | XPRT_COPY_XID;
-                        rpc_wake_up(&xprt->pending);
+                        xprt_wake_pending_tasks(xprt, 0);
                 }
                 spin_unlock_bh(&xprt->transport_lock);
                 break;
@@ -920,10 +920,7 @@ static void xs_connect_worker(void *args)
                 }
         }
 out:
-        if (status < 0)
-                rpc_wake_up_status(&xprt->pending, status);
-        else
-                rpc_wake_up(&xprt->pending);
+        xprt_wake_pending_tasks(xprt, status);
 out_clear:
         xprt_clear_connecting(xprt);
 }