[v1,11/22] SUNRPC: Add trace_rpc_timeout_status()
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Message ID 20200708200958.22129.66745.stgit@manet.1015granger.net
State New
Headers show
Series
  • SUNRPC: Replace dprintk calls with tracepoints
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Commit Message

Chuck Lever July 8, 2020, 8:09 p.m. UTC
For a long while we've wanted a tracepoint that fires when a major
timeout is reported in the system log. Such a tracepoint can be
attached to other actions that can take place when a timeout is
detected (eg, server or connection health assessment).

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 include/trace/events/sunrpc.h |    1 +
 net/sunrpc/clnt.c             |    2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

Patch
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diff --git a/include/trace/events/sunrpc.h b/include/trace/events/sunrpc.h
index 06cb201cdfd3..f20ef9539bbf 100644
--- a/include/trace/events/sunrpc.h
+++ b/include/trace/events/sunrpc.h
@@ -261,6 +261,7 @@  DECLARE_EVENT_CLASS(rpc_task_status,
 DEFINE_RPC_STATUS_EVENT(call);
 DEFINE_RPC_STATUS_EVENT(bind);
 DEFINE_RPC_STATUS_EVENT(connect);
+DEFINE_RPC_STATUS_EVENT(timeout);
 
 TRACE_EVENT(rpc_request,
 	TP_PROTO(const struct rpc_task *task),
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 3a4f1ce31e22..cf6a295005ed 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -2397,7 +2397,7 @@  rpc_check_timeout(struct rpc_task *task)
 	if (xprt_adjust_timeout(task->tk_rqstp) == 0)
 		return;
 
-	dprintk("RPC: %5u call_timeout (major)\n", task->tk_pid);
+	trace_rpc_timeout_status(task);
 	task->tk_timeouts++;
 
 	if (RPC_IS_SOFTCONN(task) && !rpc_check_connected(task->tk_rqstp)) {