rxrpc: Add a tracepoint for the call timer

Add a tracepoint to log call timer initiation, setting and expiry.

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

1 files changed, 36 insertions, 0 deletions

diff --git a/include/trace/events/rxrpc.h b/include/trace/events/rxrpc.h
index e8f2afbbe0bf..57322897d745 100644
--- a/include/trace/events/rxrpc.h
+++ b/include/trace/events/rxrpc.h
@@ -414,6 +414,42 @@ TRACE_EVENT(rxrpc_rtt_rx,
                       __entry->avg)
             );
 
+TRACE_EVENT(rxrpc_timer,
+            TP_PROTO(struct rxrpc_call *call, enum rxrpc_timer_trace why,
+                     unsigned long now),
+
+            TP_ARGS(call, why, now),
+
+            TP_STRUCT__entry(
+                    __field(struct rxrpc_call *,                call            )
+                    __field(enum rxrpc_timer_trace,             why             )
+                    __field(unsigned long,                      now             )
+                    __field(unsigned long,                      expire_at       )
+                    __field(unsigned long,                      ack_at          )
+                    __field(unsigned long,                      resend_at       )
+                    __field(unsigned long,                      timer           )
+                             ),
+
+            TP_fast_assign(
+                    __entry->call       = call;
+                    __entry->why        = why;
+                    __entry->now        = now;
+                    __entry->expire_at  = call->expire_at;
+                    __entry->ack_at     = call->ack_at;
+                    __entry->resend_at  = call->resend_at;
+                    __entry->timer      = call->timer.expires;
+                           ),
+
+            TP_printk("c=%p %s now=%lx x=%ld a=%ld r=%ld t=%ld",
+                      __entry->call,
+                      rxrpc_timer_traces[__entry->why],
+                      __entry->now,
+                      __entry->expire_at - __entry->now,
+                      __entry->ack_at - __entry->now,
+                      __entry->resend_at - __entry->now,
+                      __entry->timer - __entry->now)
+            );
+
 #endif /* _TRACE_RXRPC_H */
 
 /* This part must be outside protection */