SUNRPC: soft connect semantics for UDP

Introduce soft connect behavior for UDP transports.  In this case, a
major timeout returns ETIMEDOUT instead of EIO.

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

1 files changed, 4 insertions, 0 deletions

diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 97931d9f8579..154034b675bd 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -1380,6 +1380,10 @@ call_timeout(struct rpc_task *task)
         dprintk("RPC: %5u call_timeout (major)\n", task->tk_pid);
         task->tk_timeouts++;
 
+        if (RPC_IS_SOFTCONN(task)) {
+                rpc_exit(task, -ETIMEDOUT);
+                return;
+        }
         if (RPC_IS_SOFT(task)) {
                 if (clnt->cl_chatty)
                         printk(KERN_NOTICE "%s: server %s not responding, timed out\n",