hyper-v: trace vmbus_onopen_result()

Add tracepoint to CHANNELMSG_OPENCHANNEL_RESULT handler.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2 files changed, 19 insertions, 0 deletions

diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index cfe5c9c6a87c..c735abe01712 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -986,6 +986,8 @@ static void vmbus_onopen_result(struct vmbus_channel_message_header *hdr)
 
         result = (struct vmbus_channel_open_result *)hdr;
 
+        trace_vmbus_onopen_result(result);
+
         /*
          * Find the open msg, copy the result and signal/unblock the wait event
          */
diff --git a/drivers/hv/hv_trace.h b/drivers/hv/hv_trace.h
index dbbed1d1f327..9757c19d1c08 100644
--- a/drivers/hv/hv_trace.h
+++ b/drivers/hv/hv_trace.h
@@ -69,6 +69,23 @@ TRACE_EVENT(vmbus_onoffer_rescind,
             TP_printk("child_relid 0x%x", __entry->child_relid)
         );
 
+TRACE_EVENT(vmbus_onopen_result,
+            TP_PROTO(const struct vmbus_channel_open_result *result),
+            TP_ARGS(result),
+            TP_STRUCT__entry(
+                    __field(u32, child_relid)
+                    __field(u32, openid)
+                    __field(u32, status)
+                    ),
+            TP_fast_assign(__entry->child_relid = result->child_relid;
+                           __entry->openid = result->openid;
+                           __entry->status = result->status;
+                    ),
+            TP_printk("child_relid 0x%x, openid %d, status %d",
+                      __entry->child_relid,  __entry->openid,  __entry->status
+                    )
+        );
+
 #undef TRACE_INCLUDE_PATH
 #define TRACE_INCLUDE_PATH .
 #undef TRACE_INCLUDE_FILE