SUNRPC: Move xprt_update_rtt callsite

Since commit 33849792cbcd ("xprtrdma: Detect unreachable NFS/RDMA
servers more reliably"), the xprtrdma transport now has a ->timer
callout. But xprtrdma does not need to compute RTT data, only UDP
needs that. Move the xprt_update_rtt call into the UDP transport
implementation.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h
index 7fad838..ad322ce 100644 (file)
--- a/include/linux/sunrpc/xprt.h
+++ b/include/linux/sunrpc/xprt.h
@@ -373,6 +373,7 @@ void                        xprt_wait_for_buffer_space(struct rpc_task *task, rpc_action action);
 void                   xprt_write_space(struct rpc_xprt *xprt);
 void                   xprt_adjust_cwnd(struct rpc_xprt *xprt, struct rpc_task *task, int result);
 struct rpc_rqst *      xprt_lookup_rqst(struct rpc_xprt *xprt, __be32 xid);
+void                   xprt_update_rtt(struct rpc_task *task);
 void                   xprt_complete_rqst(struct rpc_task *task, int copied);
 void                   xprt_pin_rqst(struct rpc_rqst *req);
 void                   xprt_unpin_rqst(struct rpc_rqst *req);

diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 8f0ad4f..13fbb48 100644 (file)
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -889,7 +889,13 @@ __must_hold(&req->rq_xprt->recv_lock)
        }
 }
 
-static void xprt_update_rtt(struct rpc_task *task)
+/**
+ * xprt_update_rtt - Update RPC RTT statistics
+ * @task: RPC request that recently completed
+ *
+ * Caller holds xprt->recv_lock.
+ */
+void xprt_update_rtt(struct rpc_task *task)
 {
        struct rpc_rqst *req = task->tk_rqstp;
        struct rpc_rtt *rtt = task->tk_client->cl_rtt;
@@ -902,6 +908,7 @@ static void xprt_update_rtt(struct rpc_task *task)
                rpc_set_timeo(rtt, timer, req->rq_ntrans - 1);
        }
 }
+EXPORT_SYMBOL_GPL(xprt_update_rtt);
 
 /**
  * xprt_complete_rqst - called when reply processing is complete
@@ -921,8 +928,6 @@ void xprt_complete_rqst(struct rpc_task *task, int copied)
 
        xprt->stat.recvs++;
        req->rq_rtt = ktime_sub(ktime_get(), req->rq_xtime);
-       if (xprt->ops->timer != NULL)
-               xprt_update_rtt(task);
 
        list_del_init(&req->rq_list);
        req->rq_private_buf.len = copied;

diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index a6b8c1f..61df77f 100644 (file)
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -1060,6 +1060,7 @@ static void xs_udp_data_read_skb(struct rpc_xprt *xprt,
        if (!rovr)
                goto out_unlock;
        xprt_pin_rqst(rovr);
+       xprt_update_rtt(rovr->rq_task);
        spin_unlock(&xprt->recv_lock);
        task = rovr->rq_task;