SUNRPC: Use struct xdr_stream when constructing RPC Call header

Modernize and harden the code path that constructs each RPC Call
message.

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

1 files changed, 29 insertions, 0 deletions

diff --git a/include/trace/events/sunrpc.h b/include/trace/events/sunrpc.h
index 627650800676..2b3f9d139e75 100644
--- a/include/trace/events/sunrpc.h
+++ b/include/trace/events/sunrpc.h
@@ -213,6 +213,35 @@ DECLARE_EVENT_CLASS(rpc_task_queued,
 DEFINE_RPC_QUEUED_EVENT(sleep);
 DEFINE_RPC_QUEUED_EVENT(wakeup);
 
+DECLARE_EVENT_CLASS(rpc_failure,
+
+        TP_PROTO(const struct rpc_task *task),
+
+        TP_ARGS(task),
+
+        TP_STRUCT__entry(
+                __field(unsigned int, task_id)
+                __field(unsigned int, client_id)
+        ),
+
+        TP_fast_assign(
+                __entry->task_id = task->tk_pid;
+                __entry->client_id = task->tk_client->cl_clid;
+        ),
+
+        TP_printk("task:%u@%u",
+                __entry->task_id, __entry->client_id)
+);
+
+#define DEFINE_RPC_FAILURE(name)                                        \
+        DEFINE_EVENT(rpc_failure, rpc_bad_##name,                       \
+                        TP_PROTO(                                       \
+                                const struct rpc_task *task             \
+                        ),                                              \
+                        TP_ARGS(task))
+
+DEFINE_RPC_FAILURE(callhdr);
+
 TRACE_EVENT(rpc_stats_latency,
 
         TP_PROTO(