rxrpc: Trace call completion

Add a tracepoint to track rxrpc calls moving into the completed state and
to log the completion type and the recorded error value and abort code.

Signed-off-by: David Howells <dhowells@redhat.com>

2 files changed, 34 insertions, 0 deletions

diff --git a/include/trace/events/rxrpc.h b/include/trace/events/rxrpc.h
index 4d2c2d35c5cb..2ea788f6f95d 100644
--- a/include/trace/events/rxrpc.h
+++ b/include/trace/events/rxrpc.h
@@ -400,6 +400,13 @@ enum rxrpc_congest_change {
         EM(RXRPC_ACK_IDLE,                      "IDL") \
         E_(RXRPC_ACK__INVALID,                  "-?-")
 
+#define rxrpc_completions \
+        EM(RXRPC_CALL_SUCCEEDED,                "Succeeded") \
+        EM(RXRPC_CALL_REMOTELY_ABORTED,         "RemoteAbort") \
+        EM(RXRPC_CALL_LOCALLY_ABORTED,          "LocalAbort") \
+        EM(RXRPC_CALL_LOCAL_ERROR,              "LocalError") \
+        E_(RXRPC_CALL_NETWORK_ERROR,            "NetError")
+
 /*
  * Export enum symbols via userspace.
  */
@@ -624,6 +631,32 @@ TRACE_EVENT(rxrpc_abort,
                       __entry->abort_code, __entry->error, __entry->why)
             );
 
+TRACE_EVENT(rxrpc_call_complete,
+            TP_PROTO(struct rxrpc_call *call),
+
+            TP_ARGS(call),
+
+            TP_STRUCT__entry(
+                    __field(unsigned int,               call            )
+                    __field(enum rxrpc_call_completion, compl           )
+                    __field(int,                        error           )
+                    __field(u32,                        abort_code      )
+                             ),
+
+            TP_fast_assign(
+                    __entry->call = call->debug_id;
+                    __entry->compl = call->completion;
+                    __entry->error = call->error;
+                    __entry->abort_code = call->abort_code;
+                           ),
+
+            TP_printk("c=%08x %s r=%d ac=%d",
+                      __entry->call,
+                      __print_symbolic(__entry->compl, rxrpc_completions),
+                      __entry->error,
+                      __entry->abort_code)
+            );
+
 TRACE_EVENT(rxrpc_transmit,
             TP_PROTO(struct rxrpc_call *call, enum rxrpc_transmit_trace why),
 
diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h
index 9c9817ddafc5..21cf164b6d85 100644
--- a/net/rxrpc/ar-internal.h
+++ b/net/rxrpc/ar-internal.h
@@ -778,6 +778,7 @@ static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call,
                 call->error = error;
                 call->completion = compl,
                 call->state = RXRPC_CALL_COMPLETE;
+                trace_rxrpc_call_complete(call);
                 wake_up(&call->waitq);
                 return true;
         }