SUNRPC: Add tracepoints for dropped and deferred requests

Dropping and/or deferring requests has an impact on performance. Let's
make sure we can trace those events.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 61 insertions, 0 deletions

diff --git a/include/trace/events/sunrpc.h b/include/trace/events/sunrpc.h
index b014207a95a8..8a707f8a41c3 100644
--- a/include/trace/events/sunrpc.h
+++ b/include/trace/events/sunrpc.h
@@ -473,6 +473,39 @@ TRACE_EVENT(svc_recv,
                         show_rqstp_flags(__entry->flags))
 );
 
+DECLARE_EVENT_CLASS(svc_rqst_event,
+
+        TP_PROTO(struct svc_rqst *rqst),
+
+        TP_ARGS(rqst),
+
+        TP_STRUCT__entry(
+                __field(__be32, xid)
+                __field(unsigned long, flags)
+                __dynamic_array(unsigned char, addr, rqst->rq_addrlen)
+        ),
+
+        TP_fast_assign(
+                __entry->xid = rqst->rq_xid;
+                __entry->flags = rqst->rq_flags;
+                memcpy(__get_dynamic_array(addr),
+                        &rqst->rq_addr, rqst->rq_addrlen);
+        ),
+
+        TP_printk("addr=%pIScp rq_xid=0x%x flags=%s",
+                (struct sockaddr *)__get_dynamic_array(addr),
+                be32_to_cpu(__entry->xid),
+                show_rqstp_flags(__entry->flags))
+);
+
+DEFINE_EVENT(svc_rqst_event, svc_defer,
+        TP_PROTO(struct svc_rqst *rqst),
+        TP_ARGS(rqst));
+
+DEFINE_EVENT(svc_rqst_event, svc_drop,
+        TP_PROTO(struct svc_rqst *rqst),
+        TP_ARGS(rqst));
+
 DECLARE_EVENT_CLASS(svc_rqst_status,
 
         TP_PROTO(struct svc_rqst *rqst, int status),
@@ -636,6 +669,34 @@ TRACE_EVENT(svc_handle_xprt,
                         (struct sockaddr *)__get_dynamic_array(addr) : NULL,
                 __entry->len, show_svc_xprt_flags(__entry->flags))
 );
+
+
+DECLARE_EVENT_CLASS(svc_deferred_event,
+        TP_PROTO(struct svc_deferred_req *dr),
+
+        TP_ARGS(dr),
+
+        TP_STRUCT__entry(
+                __field(__be32, xid)
+                __dynamic_array(unsigned char, addr, dr->addrlen)
+        ),
+
+        TP_fast_assign(
+                __entry->xid = *(__be32 *)(dr->args + (dr->xprt_hlen>>2));
+                memcpy(__get_dynamic_array(addr), &dr->addr, dr->addrlen);
+        ),
+
+        TP_printk("addr=%pIScp xid=0x%x",
+                (struct sockaddr *)__get_dynamic_array(addr),
+                be32_to_cpu(__entry->xid))
+);
+
+DEFINE_EVENT(svc_deferred_event, svc_drop_deferred,
+        TP_PROTO(struct svc_deferred_req *dr),
+        TP_ARGS(dr));
+DEFINE_EVENT(svc_deferred_event, svc_revisit_deferred,
+        TP_PROTO(struct svc_deferred_req *dr),
+        TP_ARGS(dr));
 #endif /* _TRACE_SUNRPC_H */
 
 #include <trace/define_trace.h>