[deliverable/linux.git] / kernel / trace / trace_export.c

/*
 * trace_export.c - export basic ftrace utilities to user space
 *
 * Copyright (C) 2009 Steven Rostedt <srostedt@redhat.com>
 */
#include <linux/stringify.h>
#include <linux/kallsyms.h>
#include <linux/seq_file.h>
#include <linux/debugfs.h>
#include <linux/uaccess.h>
#include <linux/ftrace.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/fs.h>

#include "trace_output.h"

#undef TRACE_SYSTEM
#define TRACE_SYSTEM	ftrace

/* not needed for this file */
#undef __field_struct
#define __field_struct(type, item)

#undef __field
#define __field(type, item)						\
	ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t"	\
			       "offset:%zu;\tsize:%zu;\n",		\
			       offsetof(typeof(field), item),		\
			       sizeof(field.item));			\
	if (!ret)							\
		return 0;

#undef __field_desc
#define __field_desc(type, container, item)				\
	ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t"	\
			       "offset:%zu;\tsize:%zu;\n",		\
			       offsetof(typeof(field), container.item),	\
			       sizeof(field.container.item));		\
	if (!ret)							\
		return 0;

#undef __array
#define __array(type, item, len)					\
	ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \
			       "offset:%zu;\tsize:%zu;\n",		\
			       offsetof(typeof(field), item),	\
			       sizeof(field.item));		\
	if (!ret)							\
		return 0;

#undef __array_desc
#define __array_desc(type, container, item, len)			\
	ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \
			       "offset:%zu;\tsize:%zu;\n",		\
			       offsetof(typeof(field), container.item),	\
			       sizeof(field.container.item));		\
	if (!ret)							\
		return 0;

#undef __dynamic_array
#define __dynamic_array(type, item)					\
	ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t"	\
			       "offset:%zu;\tsize:0;\n",		\
			       offsetof(typeof(field), item));		\
	if (!ret)							\
		return 0;

#undef F_printk
#define F_printk(fmt, args...) "%s, %s\n", #fmt, __stringify(args)

#undef __entry
#define __entry REC

#undef FTRACE_ENTRY
#define FTRACE_ENTRY(name, struct_name, id, tstruct, print)		\
static int								\
ftrace_format_##name(struct ftrace_event_call *unused,			\
		     struct trace_seq *s)				\
{									\
	struct struct_name field __attribute__((unused));		\
	int ret = 0;							\
									\
	tstruct;							\
									\
	trace_seq_printf(s, "\nprint fmt: " print);			\
									\
	return ret;							\
}

#undef FTRACE_ENTRY_DUP
#define FTRACE_ENTRY_DUP(name, struct_name, id, tstruct, print)	\
	FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print))

#include "trace_entries.h"


#undef __field
#define __field(type, item)						\
	ret = trace_define_field(event_call, #type, #item,		\
				 offsetof(typeof(field), item),		\
				 sizeof(field.item),			\
				 is_signed_type(type), FILTER_OTHER);	\
	if (ret)							\
		return ret;

#undef __field_desc
#define __field_desc(type, container, item)	\
	ret = trace_define_field(event_call, #type, #item,		\
				 offsetof(typeof(field),		\
					  container.item),		\
				 sizeof(field.container.item),		\
				 is_signed_type(type), FILTER_OTHER);	\
	if (ret)							\
		return ret;

#undef __array
#define __array(type, item, len)					\
	BUILD_BUG_ON(len > MAX_FILTER_STR_VAL);				\
	ret = trace_define_field(event_call, #type "[" #len "]", #item,	\
				 offsetof(typeof(field), item),		\
				 sizeof(field.item), 0, FILTER_OTHER);	\
	if (ret)							\
		return ret;

#undef __array_desc
#define __array_desc(type, container, item, len)			\
	BUILD_BUG_ON(len > MAX_FILTER_STR_VAL);				\
	ret = trace_define_field(event_call, #type "[" #len "]", #item,	\
				 offsetof(typeof(field),		\
					  container.item),		\
				 sizeof(field.container.item), 0,	\
				 FILTER_OTHER);				\
	if (ret)							\
		return ret;

#undef __dynamic_array
#define __dynamic_array(type, item)

#undef FTRACE_ENTRY
#define FTRACE_ENTRY(name, struct_name, id, tstruct, print)		\
int									\
ftrace_define_fields_##name(struct ftrace_event_call *event_call)	\
{									\
	struct struct_name field;					\
	int ret;							\
									\
	ret = trace_define_common_fields(event_call);			\
	if (ret)							\
		return ret;						\
									\
	tstruct;							\
									\
	return ret;							\
}

#include "trace_entries.h"


#undef __field
#define __field(type, item)

#undef __field_desc
#define __field_desc(type, container, item)

#undef __array
#define __array(type, item, len)

#undef __array_desc
#define __array_desc(type, container, item, len)

#undef __dynamic_array
#define __dynamic_array(type, item)


#undef TRACE_ZERO_CHAR
#define TRACE_ZERO_CHAR(arg)

#undef TRACE_FIELD
#define TRACE_FIELD(type, item, assign)\
	entry->item = assign;

#undef TRACE_FIELD
#define TRACE_FIELD(type, item, assign)\
	entry->item = assign;

#undef TRACE_FIELD_SIGN
#define TRACE_FIELD_SIGN(type, item, assign, is_signed)	\
	TRACE_FIELD(type, item, assign)

#undef TP_CMD
#define TP_CMD(cmd...)	cmd

#undef TRACE_ENTRY
#define TRACE_ENTRY	entry

#undef TRACE_FIELD_SPECIAL
#define TRACE_FIELD_SPECIAL(type_item, item, len, cmd)	\
	cmd;

#undef FTRACE_ENTRY
#define FTRACE_ENTRY(call, struct_name, type, tstruct, print)		\
static int ftrace_raw_init_event_##call(void);				\
									\
struct ftrace_event_call __used						\
__attribute__((__aligned__(4)))						\
__attribute__((section("_ftrace_events"))) event_##call = {		\
	.name			= #call,				\
	.id			= type,					\
	.system			= __stringify(TRACE_SYSTEM),		\
	.raw_init		= ftrace_raw_init_event_##call,		\
	.show_format		= ftrace_format_##call,			\
	.define_fields		= ftrace_define_fields_##call,		\
};									\
static int ftrace_raw_init_event_##call(void)				\
{									\
	INIT_LIST_HEAD(&event_##call.fields);				\
	return 0;							\
}									\

#include "trace_entries.h"
Commit	Line	Data
770cb243 SR	1	/*
	2	* trace_export.c - export basic ftrace utilities to user space
	3	*
	4	* Copyright (C) 2009 Steven Rostedt <srostedt@redhat.com>
	5	*/
	6	#include <linux/stringify.h>
	7	#include <linux/kallsyms.h>
	8	#include <linux/seq_file.h>
	9	#include <linux/debugfs.h>
	10	#include <linux/uaccess.h>
	11	#include <linux/ftrace.h>
	12	#include <linux/module.h>
	13	#include <linux/init.h>
	14	#include <linux/fs.h>
	15
	16	#include "trace_output.h"
	17
4e5292ea SR	18	#undef TRACE_SYSTEM
4e5292ea SR	19	#define TRACE_SYSTEM ftrace
da4d0302	20
4e5292ea SR	21	/* not needed for this file */
	22	#undef __field_struct
	23	#define __field_struct(type, item)
da4d0302	24
4e5292ea SR	25	#undef __field
	26	#define __field(type, item) \
	27	ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \
	28	"offset:%zu;\tsize:%zu;\n", \
	29	offsetof(typeof(field), item), \
	30	sizeof(field.item)); \
	31	if (!ret) \
	32	return 0;
75db37d2	33
4e5292ea SR	34	#undef __field_desc
4e5292ea SR	35	#define __field_desc(type, container, item) \
da4d0302	36	ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \
4e5292ea SR	37	"offset:%zu;\tsize:%zu;\n", \
	38	offsetof(typeof(field), container.item), \
	39	sizeof(field.container.item)); \
da4d0302 SR	40	if (!ret) \
	41	return 0;
	42
4e5292ea SR	43	#undef __array
	44	#define __array(type, item, len) \
	45	ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \
	46	"offset:%zu;\tsize:%zu;\n", \
	47	offsetof(typeof(field), item), \
	48	sizeof(field.item)); \
	49	if (!ret) \
	50	return 0;
da4d0302	51
4e5292ea SR	52	#undef __array_desc
	53	#define __array_desc(type, container, item, len) \
	54	ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \
	55	"offset:%zu;\tsize:%zu;\n", \
	56	offsetof(typeof(field), container.item), \
	57	sizeof(field.container.item)); \
da4d0302 SR	58	if (!ret) \
da4d0302 SR	59	return 0;
770cb243	60
4e5292ea SR	61	#undef __dynamic_array
	62	#define __dynamic_array(type, item) \
	63	ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \
	64	"offset:%zu;\tsize:0;\n", \
	65	offsetof(typeof(field), item)); \
156b5f17	66	if (!ret) \
770cb243 SR	67	return 0;
770cb243 SR	68
4e5292ea SR	69	#undef F_printk
4e5292ea SR	70	#define F_printk(fmt, args...) "%s, %s\n", #fmt, __stringify(args)
770cb243	71
4e5292ea SR	72	#undef __entry
4e5292ea SR	73	#define __entry REC
770cb243	74
4e5292ea SR	75	#undef FTRACE_ENTRY
4e5292ea SR	76	#define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \
770cb243	77	static int \
4e5292ea SR	78	ftrace_format_##name(struct ftrace_event_call *unused, \
4e5292ea SR	79	struct trace_seq *s) \
770cb243	80	{ \
4e5292ea SR	81	struct struct_name field __attribute__((unused)); \
4e5292ea SR	82	int ret = 0; \
770cb243 SR	83	\
	84	tstruct; \
	85	\
4e5292ea	86	trace_seq_printf(s, "\nprint fmt: " print); \
770cb243 SR	87	\
	88	return ret; \
	89	}
	90
4e5292ea SR	91	#undef FTRACE_ENTRY_DUP
	92	#define FTRACE_ENTRY_DUP(name, struct_name, id, tstruct, print) \
	93	FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print))
	94
	95	#include "trace_entries.h"
	96
	97
	98	#undef __field
	99	#define __field(type, item) \
	100	ret = trace_define_field(event_call, #type, #item, \
	101	offsetof(typeof(field), item), \
	102	sizeof(field.item), \
	103	is_signed_type(type), FILTER_OTHER); \
	104	if (ret) \
	105	return ret;
	106
	107	#undef __field_desc
	108	#define __field_desc(type, container, item) \
	109	ret = trace_define_field(event_call, #type, #item, \
	110	offsetof(typeof(field), \
	111	container.item), \
	112	sizeof(field.container.item), \
	113	is_signed_type(type), FILTER_OTHER); \
	114	if (ret) \
	115	return ret;
	116
	117	#undef __array
	118	#define __array(type, item, len) \
	119	BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
	120	ret = trace_define_field(event_call, #type "[" #len "]", #item, \
	121	offsetof(typeof(field), item), \
	122	sizeof(field.item), 0, FILTER_OTHER); \
	123	if (ret) \
	124	return ret;
	125
	126	#undef __array_desc
	127	#define __array_desc(type, container, item, len) \
	128	BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
	129	ret = trace_define_field(event_call, #type "[" #len "]", #item, \
	130	offsetof(typeof(field), \
	131	container.item), \
	132	sizeof(field.container.item), 0, \
	133	FILTER_OTHER); \
	134	if (ret) \
	135	return ret;
	136
	137	#undef __dynamic_array
	138	#define __dynamic_array(type, item)
	139
	140	#undef FTRACE_ENTRY
	141	#define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \
	142	int \
	143	ftrace_define_fields_##name(struct ftrace_event_call *event_call) \
e45f2e2b	144	{ \
4e5292ea	145	struct struct_name field; \
e45f2e2b TZ	146	int ret; \
e45f2e2b TZ	147	\
4e5292ea SR	148	ret = trace_define_common_fields(event_call); \
	149	if (ret) \
	150	return ret; \
e45f2e2b	151	\
4e5292ea	152	tstruct; \
e45f2e2b TZ	153	\
	154	return ret; \
	155	}
	156
4e5292ea SR	157	#include "trace_entries.h"
	158
	159
	160	#undef __field
	161	#define __field(type, item)
	162
	163	#undef __field_desc
	164	#define __field_desc(type, container, item)
	165
	166	#undef __array
	167	#define __array(type, item, len)
	168
	169	#undef __array_desc
	170	#define __array_desc(type, container, item, len)
	171
	172	#undef __dynamic_array
	173	#define __dynamic_array(type, item)
	174
770cb243 SR	175
	176	#undef TRACE_ZERO_CHAR
	177	#define TRACE_ZERO_CHAR(arg)
	178
	179	#undef TRACE_FIELD
	180	#define TRACE_FIELD(type, item, assign)\
	181	entry->item = assign;
	182
	183	#undef TRACE_FIELD
	184	#define TRACE_FIELD(type, item, assign)\
	185	entry->item = assign;
	186
a118e4d1 TZ	187	#undef TRACE_FIELD_SIGN
	188	#define TRACE_FIELD_SIGN(type, item, assign, is_signed) \
	189	TRACE_FIELD(type, item, assign)
	190
2939b046 SR	191	#undef TP_CMD
2939b046 SR	192	#define TP_CMD(cmd...) cmd
770cb243 SR	193
	194	#undef TRACE_ENTRY
	195	#define TRACE_ENTRY entry
	196
	197	#undef TRACE_FIELD_SPECIAL
e1112b4d	198	#define TRACE_FIELD_SPECIAL(type_item, item, len, cmd) \
770cb243 SR	199	cmd;
770cb243 SR	200
4e5292ea SR	201	#undef FTRACE_ENTRY
4e5292ea SR	202	#define FTRACE_ENTRY(call, struct_name, type, tstruct, print) \
e1112b4d	203	static int ftrace_raw_init_event_##call(void); \
770cb243	204	\
e1112b4d	205	struct ftrace_event_call __used \
770cb243 SR	206	__attribute__((__aligned__(4))) \
770cb243 SR	207	__attribute__((section("_ftrace_events"))) event_##call = { \
ef18012b	208	.name = #call, \
4e5292ea	209	.id = type, \
770cb243	210	.system = __stringify(TRACE_SYSTEM), \
e1112b4d	211	.raw_init = ftrace_raw_init_event_##call, \
770cb243	212	.show_format = ftrace_format_##call, \
e1112b4d TZ	213	.define_fields = ftrace_define_fields_##call, \
	214	}; \
	215	static int ftrace_raw_init_event_##call(void) \
	216	{ \
	217	INIT_LIST_HEAD(&event_##call.fields); \
	218	return 0; \
	219	} \
	220
4e5292ea	221	#include "trace_entries.h"