[PATCH 08/16] hyper-v: trace vmbus_onversion_response()

Vitaly Kuznetsov
2017-09-20T17:22:34Z

Add tracepoint to CHANNELMSG_VERSION_RESPONSE handler.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
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
index 1ff2cc064850..a9a1fc1424c6 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -1121,6 +1121,9 @@ 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
index 67e43dd59771..1478ec36967e 100644
--- a/drivers/hv/hv_trace.h
+++ b/drivers/hv/hv_trace.h
@@ -109,6 +109,17 @@ 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)