From: kys@exchange.microsoft.com
To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org,
devel@linuxdriverproject.org, olaf@aepfle.de, apw@canonical.com,
vkuznets@redhat.com, jasowang@redhat.com,
leann.ogasawara@canonical.com, marcelo.cerri@canonical.com,
sthemmin@microsoft.com
Cc: "K . Y . Srinivasan" <kys@microsoft.com>
Subject: [PATCH 01/17] hyper-v: trace vmbus_on_msg_dpc()
Date: Sun, 29 Oct 2017 12:21:00 -0700 [thread overview]
Message-ID: <20171029192116.12466-1-kys@exchange.microsoft.com> (raw)
In-Reply-To: <20171029192030.12356-1-kys@exchange.microsoft.com>
From: Vitaly Kuznetsov <vkuznets@redhat.com>
Add tracing subsystem to Hyper-V VMBus module and add tracepoint
to vmbus_on_msg_dpc() which is called when we receive a message from host.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
---
drivers/hv/Makefile | 4 +++-
drivers/hv/hv_trace.c | 4 ++++
drivers/hv/hv_trace.h | 29 +++++++++++++++++++++++++++++
drivers/hv/hyperv_vmbus.h | 2 ++
drivers/hv/vmbus_drv.c | 2 ++
5 files changed, 40 insertions(+), 1 deletion(-)
create mode 100644 drivers/hv/hv_trace.c
create mode 100644 drivers/hv/hv_trace.h
diff --git a/drivers/hv/Makefile b/drivers/hv/Makefile
index 39c9b2c08d33..ad791e00230f 100644
--- a/drivers/hv/Makefile
+++ b/drivers/hv/Makefile
@@ -2,7 +2,9 @@ obj-$(CONFIG_HYPERV) += hv_vmbus.o
obj-$(CONFIG_HYPERV_UTILS) += hv_utils.o
obj-$(CONFIG_HYPERV_BALLOON) += hv_balloon.o
+CFLAGS_hv_trace.o = -I$(src)
+
hv_vmbus-y := vmbus_drv.o \
hv.o connection.o channel.o \
- channel_mgmt.o ring_buffer.o
+ channel_mgmt.o ring_buffer.o hv_trace.o
hv_utils-y := hv_util.o hv_kvp.o hv_snapshot.o hv_fcopy.o hv_utils_transport.o
diff --git a/drivers/hv/hv_trace.c b/drivers/hv/hv_trace.c
new file mode 100644
index 000000000000..df47acd01a81
--- /dev/null
+++ b/drivers/hv/hv_trace.c
@@ -0,0 +1,4 @@
+#include "hyperv_vmbus.h"
+
+#define CREATE_TRACE_POINTS
+#include "hv_trace.h"
diff --git a/drivers/hv/hv_trace.h b/drivers/hv/hv_trace.h
new file mode 100644
index 000000000000..9c2772922c76
--- /dev/null
+++ b/drivers/hv/hv_trace.h
@@ -0,0 +1,29 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM hyperv
+
+#if !defined(_HV_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _HV_TRACE_H
+
+#include <linux/tracepoint.h>
+
+DECLARE_EVENT_CLASS(vmbus_hdr_msg,
+ TP_PROTO(const struct vmbus_channel_message_header *hdr),
+ TP_ARGS(hdr),
+ TP_STRUCT__entry(__field(unsigned int, msgtype)),
+ TP_fast_assign(__entry->msgtype = hdr->msgtype;),
+ TP_printk("msgtype=%u", __entry->msgtype)
+);
+
+DEFINE_EVENT(vmbus_hdr_msg, vmbus_on_msg_dpc,
+ TP_PROTO(const struct vmbus_channel_message_header *hdr),
+ TP_ARGS(hdr)
+);
+
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE hv_trace
+#endif /* _HV_TRACE_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h
index de6f01df9592..22300ec7b556 100644
--- a/drivers/hv/hyperv_vmbus.h
+++ b/drivers/hv/hyperv_vmbus.h
@@ -31,6 +31,8 @@
#include <linux/hyperv.h>
#include <linux/interrupt.h>
+#include "hv_trace.h"
+
/*
* Timeout for services such as KVP and fcopy.
*/
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 8fe13cd76acf..8f9293a87c6b 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -835,6 +835,8 @@ void vmbus_on_msg_dpc(unsigned long data)
hdr = (struct vmbus_channel_message_header *)msg->u.payload;
+ trace_vmbus_on_msg_dpc(hdr);
+
if (hdr->msgtype >= CHANNELMSG_COUNT) {
WARN_ONCE(1, "unknown msgtype=%d\n", hdr->msgtype);
goto msg_handled;
--
2.14.1
next prev parent reply other threads:[~2017-10-29 19:25 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-29 19:20 [PATCH 00/17] Drivers: hv: vmbus: Add tracing to VMBus kys
2017-10-29 19:21 ` kys [this message]
2017-10-29 19:21 ` [PATCH 02/17] hyper-v: trace vmbus_on_message() kys
2017-10-29 19:21 ` [PATCH 03/17] hyper-v: trace vmbus_onoffer() kys
2017-10-29 19:21 ` [PATCH 04/17] hyper-v: trace vmbus_onoffer_rescind() kys
2017-10-29 19:21 ` [PATCH 05/17] hyper-v: trace vmbus_onopen_result() kys
2017-10-29 19:21 ` [PATCH 06/17] hyper-v: trace vmbus_ongpadl_created() kys
2017-10-29 19:21 ` [PATCH 07/17] hyper-v: trace vmbus_ongpadl_torndown() kys
2017-10-29 19:21 ` [PATCH 08/17] hyper-v: trace vmbus_onversion_response() kys
2017-10-29 19:21 ` [PATCH 09/17] hyper-v: trace vmbus_request_offers() kys
2017-10-29 19:21 ` [PATCH 10/17] hyper-v: trace vmbus_open() kys
2017-10-29 20:59 ` Greg KH
2017-10-30 8:16 ` Vitaly Kuznetsov
2017-10-30 8:45 ` Greg KH
2017-10-30 10:07 ` Vitaly Kuznetsov
2017-10-30 10:32 ` Greg KH
2017-10-30 14:31 ` Steven Rostedt
2017-10-31 12:48 ` Greg KH
2017-10-31 13:10 ` Steven Rostedt
2017-11-01 17:43 ` KY Srinivasan
2017-11-04 11:05 ` Greg KH
2017-11-04 15:09 ` KY Srinivasan
2017-10-31 17:41 ` Stephen Hemminger
2017-10-29 19:21 ` [PATCH 11/17] hyper-v: trace vmbus_close_internal() kys
2017-10-29 19:21 ` [PATCH 12/17] hyper-v: trace vmbus_establish_gpadl() kys
2017-10-29 19:21 ` [PATCH 13/17] hyper-v: trace vmbus_teardown_gpadl() kys
2017-10-29 19:21 ` [PATCH 14/17] hyper-v: trace vmbus_negotiate_version() kys
2017-10-29 19:21 ` [PATCH 15/17] hyper-v: trace vmbus_release_relid() kys
2017-10-29 19:21 ` [PATCH 16/17] hyper-v: trace vmbus_send_tl_connect_request() kys
2017-10-29 19:21 ` [PATCH 17/17] hyper-v: trace channel events kys
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