diff mbox series

[v3,2/5] usb: gadget: add trace event of configfs operation

Message ID 1648614980-25024-3-git-send-email-quic_linyyuan@quicinc.com
State Superseded
Headers show
Series usb: gadget: configfs: new trace events | expand

Commit Message

Linyu Yuan March 30, 2022, 4:36 a.m. UTC 
Add a common trace event entry which have only one __string field,
it allow create APIs base on it to add trace events for
usb gadget and function layer, then it will cover all user input
like make configfs group/item, drop item, write attribute, allow/drop link.

Signed-off-by: Linyu Yuan <quic_linyyuan@quicinc.com>
---
v2: no change
v3: add trace.c and configfs.c will not include trace.h

 drivers/usb/gadget/Makefile |  2 ++
 drivers/usb/gadget/trace.c  |  8 ++++++++
 drivers/usb/gadget/trace.h  | 39 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 49 insertions(+)
 create mode 100644 drivers/usb/gadget/trace.c
 create mode 100644 drivers/usb/gadget/trace.h
diff mbox series

Patch

diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile
index 33f1ef9..b426f5c 100644
--- a/drivers/usb/gadget/Makefile
+++ b/drivers/usb/gadget/Makefile
@@ -8,5 +8,7 @@  subdir-ccflags-$(CONFIG_USB_GADGET_VERBOSE)	+= -DVERBOSE_DEBUG
 obj-$(CONFIG_USB_LIBCOMPOSITE)	+= libcomposite.o
 libcomposite-y			:= usbstring.o config.o epautoconf.o
 libcomposite-y			+= composite.o functions.o configfs.o u_f.o
+CFLAGS_trace.o			:= -I$(src)
+libcomposite-y			+= trace.o
 
 obj-$(CONFIG_USB_GADGET)	+= udc/ function/ legacy/
diff --git a/drivers/usb/gadget/trace.c b/drivers/usb/gadget/trace.c
new file mode 100644
index 0000000..8b4b1db
--- /dev/null
+++ b/drivers/usb/gadget/trace.c
@@ -0,0 +1,8 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#define CREATE_TRACE_POINTS
+#include "trace.h"
+
diff --git a/drivers/usb/gadget/trace.h b/drivers/usb/gadget/trace.h
new file mode 100644
index 0000000..d556580
--- /dev/null
+++ b/drivers/usb/gadget/trace.h
@@ -0,0 +1,39 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM gadget_configfs
+
+
+#if !defined(_GADGET_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _GADGET_TRACE_H
+
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(gadget_configfs,
+	TP_PROTO(char *info),
+	TP_ARGS(info),
+	TP_STRUCT__entry(
+		__string(info, info)
+	),
+
+	TP_fast_assign(
+		__assign_str(info, info);
+	),
+
+	TP_printk("%s", __get_str(info))
+);
+
+#endif /* _GADGET_TRACE_H */
+
+/* this part has to be here */
+
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE trace
+
+#include <trace/define_trace.h>