From cb59752ba173d41f736ee315569727d8ebc22f3b Mon Sep 17 00:00:00 2001
From: Vitaly Kuznetsov <vkuznets@redhat.com>
Date: Sun, 29 Oct 2017 12:21:03 -0700
Subject: [PATCH 05/21] hyper-v: trace vmbus_onoffer_rescind()

Add tracepoint to CHANNELMSG_RESCIND_CHANNELOFFER 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>
(cherry picked from commit 5175167c77afb19993bd86ab8b4be63d9cb4a928)
---
 drivers/hv/channel_mgmt.c | 2 ++
 drivers/hv/hv_trace.h     | 8 ++++++++
 2 files changed, 10 insertions(+)

diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index 28dae42c2b55..3f4ebd86cff2 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -918,6 +918,8 @@ static void vmbus_onoffer_rescind(struct vmbus_channel_message_header *hdr)
 
 	rescind = (struct vmbus_channel_rescind_offer *)hdr;
 
+	trace_vmbus_onoffer_rescind(rescind);
+
 	/*
 	 * The offer msg and the corresponding rescind msg
 	 * from the host are guranteed to be ordered -
diff --git a/drivers/hv/hv_trace.h b/drivers/hv/hv_trace.h
index 488b873b563e..dbbed1d1f327 100644
--- a/drivers/hv/hv_trace.h
+++ b/drivers/hv/hv_trace.h
@@ -61,6 +61,14 @@ TRACE_EVENT(vmbus_onoffer,
 		    )
 	);
 
+TRACE_EVENT(vmbus_onoffer_rescind,
+	    TP_PROTO(const struct vmbus_channel_rescind_offer *offer),
+	    TP_ARGS(offer),
+	    TP_STRUCT__entry(__field(u32, child_relid)),
+	    TP_fast_assign(__entry->child_relid = offer->child_relid),
+	    TP_printk("child_relid 0x%x", __entry->child_relid)
+	);
+
 #undef TRACE_INCLUDE_PATH
 #define TRACE_INCLUDE_PATH .
 #undef TRACE_INCLUDE_FILE
-- 
2.24.0

