From: Vitaly Kuznetsov <vkuznets@redhat.com>
Date: Sun, 29 Oct 2017 12:21:07 -0700
Patch-mainline: v4.15-rc1
Subject: hyper-v: trace vmbus_onversion_response()
Git-commit: c7924fb07a2646c9ff661efcad1167a1106d6019
References: fate#323887
Add tracepoint to CHANNELMSG_VERSION_RESPONSE 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>
Acked-by: Olaf Hering <ohering@suse.de>
---
drivers/hv/channel_mgmt.c | 3 +++
drivers/hv/hv_trace.h | 11 +++++++++++
2 files changed, 14 insertions(+)
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -1127,6 +1127,9 @@ static void vmbus_onversion_response(
unsigned long flags;
version_response = (struct vmbus_channel_version_response *)hdr;
+
+ trace_vmbus_onversion_response(version_response);
+
spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
list_for_each_entry(msginfo, &vmbus_connection.chn_msg_list,
diff --git a/drivers/hv/hv_trace.h b/drivers/hv/hv_trace.h
--- a/drivers/hv/hv_trace.h
+++ b/drivers/hv/hv_trace.h
@@ -111,6 +111,17 @@ TRACE_EVENT(vmbus_ongpadl_torndown,
TP_printk("gpadl 0x%x", __entry->gpadl)
);
+TRACE_EVENT(vmbus_onversion_response,
+ TP_PROTO(const struct vmbus_channel_version_response *response),
+ TP_ARGS(response),
+ TP_STRUCT__entry(
+ __field(u8, ver)
+ ),
+ TP_fast_assign(__entry->ver = response->version_supported;
+ ),
+ TP_printk("version_supported %d", __entry->ver)
+ );
+
#undef TRACE_INCLUDE_PATH
#define TRACE_INCLUDE_PATH .
#undef TRACE_INCLUDE_FILE