[PATCH 09/16] hyper-v: trace vmbus_request_offers()

Vitaly Kuznetsov
2017-09-20T17:22:33Z

Add tracepoint to CHANNELMSG_REQUESTOFFERS sender.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
drivers/hv/channel_mgmt.c | 4 +++-
drivers/hv/hv_trace.h | 8 ++++++++
2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index a9a1fc1424c6..5c39388545f5 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -1218,9 +1218,11 @@ int vmbus_request_offers(void)

msg->msgtype = CHANNELMSG_REQUESTOFFERS;

-
ret = vmbus_post_msg(msg, sizeof(struct vmbus_channel_message_header),
true);
+
+ trace_vmbus_request_offers(ret);
+
if (ret != 0) {
pr_err("Unable to request offers - %d\n", ret);

diff --git a/drivers/hv/hv_trace.h b/drivers/hv/hv_trace.h
index 1478ec36967e..b8d8460afc07 100644
--- a/drivers/hv/hv_trace.h
+++ b/drivers/hv/hv_trace.h
@@ -120,6 +120,14 @@ TRACE_EVENT(vmbus_onversion_response,
TP_printk("version_supported %d", __entry->ver)
);

+TRACE_EVENT(vmbus_request_offers,
+ TP_PROTO(int ret),
+ TP_ARGS(ret),
+ TP_STRUCT__entry(__field(int, ret)),
+ TP_fast_assign(__entry->ret = ret),
+ TP_printk("sending ret %d", __entry->ret)