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l2tp: add tracepoint infrastructure to core

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The l2tp subsystem doesn't currently make use of tracepoints.

As a starting point for adding tracepoints, add skeleton infrastructure
for defining tracepoints for the subsystem, and for having them build
appropriately whether compiled into the kernel or built as a module.

Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Parkin 2020-08-22 15:59:04 +01:00 committed by David S. Miller
parent 5ee759cda5
commit 3f117d6f4b
3 changed files with 20 additions and 0 deletions
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2
net/l2tp/Makefile
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@ -5,6 +5,8 @@
obj-$(CONFIG_L2TP) += l2tp_core.o
CFLAGS_l2tp_core.o += -I$(src)
# Build l2tp as modules if L2TP is M
obj-$(subst y,$(CONFIG_L2TP),$(CONFIG_PPPOL2TP)) += l2tp_ppp.o
obj-$(subst y,$(CONFIG_L2TP),$(CONFIG_L2TP_IP)) += l2tp_ip.o

3
net/l2tp/l2tp_core.c
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@ -62,6 +62,9 @@
#include "l2tp_core.h"
#define CREATE_TRACE_POINTS
#include "trace.h"
#define L2TP_DRV_VERSION "V2.0"
/* L2TP header constants */

15
net/l2tp/trace.h Normal file
View File

@ -0,0 +1,15 @@
/* SPDX-License-Identifier: GPL-2.0-only */
#undef TRACE_SYSTEM
#define TRACE_SYSTEM l2tp
#if !defined(_TRACE_L2TP_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_L2TP_H
#endif /* _TRACE_L2TP_H */
/* This part must be outside protection */
#undef TRACE_INCLUDE_PATH
#define TRACE_INCLUDE_PATH .
#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_FILE trace
#include <trace/define_trace.h>