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>

diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index 7c11e17..cfe5c9c 100644 (file)
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -856,6 +856,8 @@ 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 488b873..dbbed1d 100644 (file)
--- 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