[mirror_ubuntu-kernels.git] / kernel / trace / trace_probe.h

// SPDX-License-Identifier: GPL-2.0
/*
 * Common header file for probe-based Dynamic events.
 *
 * This code was copied from kernel/trace/trace_kprobe.h written by
 * Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
 *
 * Updates to make this generic:
 * Copyright (C) IBM Corporation, 2010-2011
 * Author:     Srikar Dronamraju
 */

#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/smp.h>
#include <linux/tracefs.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/ptrace.h>
#include <linux/perf_event.h>
#include <linux/kprobes.h>
#include <linux/stringify.h>
#include <linux/limits.h>
#include <linux/uaccess.h>
#include <linux/bitops.h>
#include <asm/bitsperlong.h>

#include "trace.h"
#include "trace_output.h"

#define MAX_TRACE_ARGS		128
#define MAX_ARGSTR_LEN		63
#define MAX_ARRAY_LEN		64
#define MAX_ARG_NAME_LEN	32
#define MAX_STRING_SIZE		PATH_MAX

/* Reserved field names */
#define FIELD_STRING_IP		"__probe_ip"
#define FIELD_STRING_RETIP	"__probe_ret_ip"
#define FIELD_STRING_FUNC	"__probe_func"

#undef DEFINE_FIELD
#define DEFINE_FIELD(type, item, name, is_signed)			\
	do {								\
		ret = trace_define_field(event_call, #type, name,	\
					 offsetof(typeof(field), item),	\
					 sizeof(field.item), is_signed, \
					 FILTER_OTHER);			\
		if (ret)						\
			return ret;					\
	} while (0)


/* Flags for trace_probe */
#define TP_FLAG_TRACE		1
#define TP_FLAG_PROFILE		2
#define TP_FLAG_REGISTERED	4

/* data_loc: data location, compatible with u32 */
#define make_data_loc(len, offs)	\
	(((u32)(len) << 16) | ((u32)(offs) & 0xffff))
#define get_loc_len(dl)		((u32)(dl) >> 16)
#define get_loc_offs(dl)	((u32)(dl) & 0xffff)

static nokprobe_inline void *get_loc_data(u32 *dl, void *ent)
{
	return (u8 *)ent + get_loc_offs(*dl);
}

static nokprobe_inline u32 update_data_loc(u32 loc, int consumed)
{
	u32 maxlen = get_loc_len(loc);
	u32 offset = get_loc_offs(loc);

	return make_data_loc(maxlen - consumed, offset + consumed);
}

/* Printing function type */
typedef int (*print_type_func_t)(struct trace_seq *, void *, void *);

enum fetch_op {
	FETCH_OP_NOP = 0,
	// Stage 1 (load) ops
	FETCH_OP_REG,		/* Register : .param = offset */
	FETCH_OP_STACK,		/* Stack : .param = index */
	FETCH_OP_STACKP,	/* Stack pointer */
	FETCH_OP_RETVAL,	/* Return value */
	FETCH_OP_IMM,		/* Immediate : .immediate */
	FETCH_OP_COMM,		/* Current comm */
	FETCH_OP_ARG,		/* Function argument : .param */
	FETCH_OP_FOFFS,		/* File offset: .immediate */
	// Stage 2 (dereference) op
	FETCH_OP_DEREF,		/* Dereference: .offset */
	// Stage 3 (store) ops
	FETCH_OP_ST_RAW,	/* Raw: .size */
	FETCH_OP_ST_MEM,	/* Mem: .offset, .size */
	FETCH_OP_ST_STRING,	/* String: .offset, .size */
	// Stage 4 (modify) op
	FETCH_OP_MOD_BF,	/* Bitfield: .basesize, .lshift, .rshift */
	// Stage 5 (loop) op
	FETCH_OP_LP_ARRAY,	/* Array: .param = loop count */
	FETCH_OP_END,
	FETCH_NOP_SYMBOL,	/* Unresolved Symbol holder */
};

struct fetch_insn {
	enum fetch_op op;
	union {
		unsigned int param;
		struct {
			unsigned int size;
			int offset;
		};
		struct {
			unsigned char basesize;
			unsigned char lshift;
			unsigned char rshift;
		};
		unsigned long immediate;
		void *data;
	};
};

/* fetch + deref*N + store + mod + end <= 16, this allows N=12, enough */
#define FETCH_INSN_MAX	16

/* Fetch type information table */
struct fetch_type {
	const char		*name;		/* Name of type */
	size_t			size;		/* Byte size of type */
	int			is_signed;	/* Signed flag */
	print_type_func_t	print;		/* Print functions */
	const char		*fmt;		/* Fromat string */
	const char		*fmttype;	/* Name in format file */
};

/* For defining macros, define string/string_size types */
typedef u32 string;
typedef u32 string_size;

#define PRINT_TYPE_FUNC_NAME(type)	print_type_##type
#define PRINT_TYPE_FMT_NAME(type)	print_type_format_##type

/* Printing  in basic type function template */
#define DECLARE_BASIC_PRINT_TYPE_FUNC(type)				\
int PRINT_TYPE_FUNC_NAME(type)(struct trace_seq *s, void *data, void *ent);\
extern const char PRINT_TYPE_FMT_NAME(type)[]

DECLARE_BASIC_PRINT_TYPE_FUNC(u8);
DECLARE_BASIC_PRINT_TYPE_FUNC(u16);
DECLARE_BASIC_PRINT_TYPE_FUNC(u32);
DECLARE_BASIC_PRINT_TYPE_FUNC(u64);
DECLARE_BASIC_PRINT_TYPE_FUNC(s8);
DECLARE_BASIC_PRINT_TYPE_FUNC(s16);
DECLARE_BASIC_PRINT_TYPE_FUNC(s32);
DECLARE_BASIC_PRINT_TYPE_FUNC(s64);
DECLARE_BASIC_PRINT_TYPE_FUNC(x8);
DECLARE_BASIC_PRINT_TYPE_FUNC(x16);
DECLARE_BASIC_PRINT_TYPE_FUNC(x32);
DECLARE_BASIC_PRINT_TYPE_FUNC(x64);

DECLARE_BASIC_PRINT_TYPE_FUNC(string);
DECLARE_BASIC_PRINT_TYPE_FUNC(symbol);

/* Default (unsigned long) fetch type */
#define __DEFAULT_FETCH_TYPE(t) x##t
#define _DEFAULT_FETCH_TYPE(t) __DEFAULT_FETCH_TYPE(t)
#define DEFAULT_FETCH_TYPE _DEFAULT_FETCH_TYPE(BITS_PER_LONG)
#define DEFAULT_FETCH_TYPE_STR __stringify(DEFAULT_FETCH_TYPE)

#define __ADDR_FETCH_TYPE(t) u##t
#define _ADDR_FETCH_TYPE(t) __ADDR_FETCH_TYPE(t)
#define ADDR_FETCH_TYPE _ADDR_FETCH_TYPE(BITS_PER_LONG)

#define __ASSIGN_FETCH_TYPE(_name, ptype, ftype, _size, sign, _fmttype)	\
	{.name = _name,				\
	 .size = _size,					\
	 .is_signed = sign,				\
	 .print = PRINT_TYPE_FUNC_NAME(ptype),		\
	 .fmt = PRINT_TYPE_FMT_NAME(ptype),		\
	 .fmttype = _fmttype,				\
	}
#define _ASSIGN_FETCH_TYPE(_name, ptype, ftype, _size, sign, _fmttype)	\
	__ASSIGN_FETCH_TYPE(_name, ptype, ftype, _size, sign, #_fmttype)
#define ASSIGN_FETCH_TYPE(ptype, ftype, sign)			\
	_ASSIGN_FETCH_TYPE(#ptype, ptype, ftype, sizeof(ftype), sign, ptype)

/* If ptype is an alias of atype, use this macro (show atype in format) */
#define ASSIGN_FETCH_TYPE_ALIAS(ptype, atype, ftype, sign)		\
	_ASSIGN_FETCH_TYPE(#ptype, ptype, ftype, sizeof(ftype), sign, atype)

#define ASSIGN_FETCH_TYPE_END {}
#define MAX_ARRAY_LEN	64

#ifdef CONFIG_KPROBE_EVENTS
bool trace_kprobe_on_func_entry(struct trace_event_call *call);
bool trace_kprobe_error_injectable(struct trace_event_call *call);
#else
static inline bool trace_kprobe_on_func_entry(struct trace_event_call *call)
{
	return false;
}

static inline bool trace_kprobe_error_injectable(struct trace_event_call *call)
{
	return false;
}
#endif /* CONFIG_KPROBE_EVENTS */

struct probe_arg {
	struct fetch_insn	*code;
	bool			dynamic;/* Dynamic array (string) is used */
	unsigned int		offset;	/* Offset from argument entry */
	unsigned int		count;	/* Array count */
	const char		*name;	/* Name of this argument */
	const char		*comm;	/* Command of this argument */
	char			*fmt;	/* Format string if needed */
	const struct fetch_type	*type;	/* Type of this argument */
};

struct trace_probe {
	unsigned int			flags;	/* For TP_FLAG_* */
	struct trace_event_class	class;
	struct trace_event_call		call;
	struct list_head 		files;
	ssize_t				size;	/* trace entry size */
	unsigned int			nr_args;
	struct probe_arg		args[];
};

struct event_file_link {
	struct trace_event_file		*file;
	struct list_head		list;
};

static inline bool trace_probe_is_enabled(struct trace_probe *tp)
{
	return !!(tp->flags & (TP_FLAG_TRACE | TP_FLAG_PROFILE));
}

static inline bool trace_probe_is_registered(struct trace_probe *tp)
{
	return !!(tp->flags & TP_FLAG_REGISTERED);
}

/* Check the name is good for event/group/fields */
static inline bool is_good_name(const char *name)
{
	if (!isalpha(*name) && *name != '_')
		return false;
	while (*++name != '\0') {
		if (!isalpha(*name) && !isdigit(*name) && *name != '_')
			return false;
	}
	return true;
}

static inline struct event_file_link *
find_event_file_link(struct trace_probe *tp, struct trace_event_file *file)
{
	struct event_file_link *link;

	list_for_each_entry(link, &tp->files, list)
		if (link->file == file)
			return link;

	return NULL;
}

#define TPARG_FL_RETURN BIT(0)
#define TPARG_FL_KERNEL BIT(1)
#define TPARG_FL_FENTRY BIT(2)
#define TPARG_FL_MASK	GENMASK(2, 0)

extern int traceprobe_parse_probe_arg(struct trace_probe *tp, int i,
				char *arg, unsigned int flags);

extern int traceprobe_update_arg(struct probe_arg *arg);
extern void traceprobe_free_probe_arg(struct probe_arg *arg);

extern int traceprobe_split_symbol_offset(char *symbol, long *offset);
extern int traceprobe_parse_event_name(const char **pevent,
				       const char **pgroup, char *buf);

extern int traceprobe_set_print_fmt(struct trace_probe *tp, bool is_return);

#ifdef CONFIG_PERF_EVENTS
extern struct trace_event_call *
create_local_trace_kprobe(char *func, void *addr, unsigned long offs,
			  bool is_return);
extern void destroy_local_trace_kprobe(struct trace_event_call *event_call);

extern struct trace_event_call *
create_local_trace_uprobe(char *name, unsigned long offs,
			  unsigned long ref_ctr_offset, bool is_return);
extern void destroy_local_trace_uprobe(struct trace_event_call *event_call);
#endif
extern int traceprobe_define_arg_fields(struct trace_event_call *event_call,
					size_t offset, struct trace_probe *tp);
Commit	Line	Data
bcea3f96	1	// SPDX-License-Identifier: GPL-2.0
8ab83f56 SD	2	/*
	3	* Common header file for probe-based Dynamic events.
	4	*
8ab83f56 SD	5	* This code was copied from kernel/trace/trace_kprobe.h written by
	6	* Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
	7	*
	8	* Updates to make this generic:
	9	* Copyright (C) IBM Corporation, 2010-2011
	10	* Author: Srikar Dronamraju
	11	*/
	12
	13	#include <linux/seq_file.h>
	14	#include <linux/slab.h>
	15	#include <linux/smp.h>
8434dc93	16	#include <linux/tracefs.h>
8ab83f56 SD	17	#include <linux/types.h>
	18	#include <linux/string.h>
	19	#include <linux/ctype.h>
	20	#include <linux/ptrace.h>
	21	#include <linux/perf_event.h>
	22	#include <linux/kprobes.h>
	23	#include <linux/stringify.h>
	24	#include <linux/limits.h>
	25	#include <linux/uaccess.h>
a1303af5	26	#include <linux/bitops.h>
8ab83f56 SD	27	#include <asm/bitsperlong.h>
	28
	29	#include "trace.h"
	30	#include "trace_output.h"
	31
	32	#define MAX_TRACE_ARGS 128
	33	#define MAX_ARGSTR_LEN 63
40b53b77	34	#define MAX_ARRAY_LEN 64
b4443c17	35	#define MAX_ARG_NAME_LEN 32
8ab83f56 SD	36	#define MAX_STRING_SIZE PATH_MAX
	37
	38	/* Reserved field names */
	39	#define FIELD_STRING_IP "__probe_ip"
	40	#define FIELD_STRING_RETIP "__probe_ret_ip"
	41	#define FIELD_STRING_FUNC "__probe_func"
	42
	43	#undef DEFINE_FIELD
	44	#define DEFINE_FIELD(type, item, name, is_signed) \
	45	do { \
	46	ret = trace_define_field(event_call, #type, name, \
	47	offsetof(typeof(field), item), \
	48	sizeof(field.item), is_signed, \
	49	FILTER_OTHER); \
	50	if (ret) \
	51	return ret; \
	52	} while (0)
	53
	54
	55	/* Flags for trace_probe */
	56	#define TP_FLAG_TRACE 1
	57	#define TP_FLAG_PROFILE 2
	58	#define TP_FLAG_REGISTERED 4
	59
9178412d MH	60	/* data_loc: data location, compatible with u32 */
	61	#define make_data_loc(len, offs) \
	62	(((u32)(len) << 16) \| ((u32)(offs) & 0xffff))
	63	#define get_loc_len(dl) ((u32)(dl) >> 16)
	64	#define get_loc_offs(dl) ((u32)(dl) & 0xffff)
8ab83f56	65
3da0f180	66	static nokprobe_inline void get_loc_data(u32 dl, void *ent)
b26c74e1	67	{
9178412d	68	return (u8 )ent + get_loc_offs(dl);
b26c74e1 NK	69	}
b26c74e1 NK	70
40b53b77 MH	71	static nokprobe_inline u32 update_data_loc(u32 loc, int consumed)
	72	{
	73	u32 maxlen = get_loc_len(loc);
	74	u32 offset = get_loc_offs(loc);
	75
	76	return make_data_loc(maxlen - consumed, offset + consumed);
	77	}
	78
8ab83f56	79	/* Printing function type */
56de7630	80	typedef int (print_type_func_t)(struct trace_seq , void , void );
8ab83f56	81
53305928 MH	82	enum fetch_op {
	83	FETCH_OP_NOP = 0,
	84	// Stage 1 (load) ops
	85	FETCH_OP_REG, /* Register : .param = offset */
	86	FETCH_OP_STACK, /* Stack : .param = index */
	87	FETCH_OP_STACKP, /* Stack pointer */
	88	FETCH_OP_RETVAL, /* Return value */
	89	FETCH_OP_IMM, /* Immediate : .immediate */
	90	FETCH_OP_COMM, /* Current comm */
a1303af5	91	FETCH_OP_ARG, /* Function argument : .param */
53305928 MH	92	FETCH_OP_FOFFS, /* File offset: .immediate */
	93	// Stage 2 (dereference) op
	94	FETCH_OP_DEREF, /* Dereference: .offset */
	95	// Stage 3 (store) ops
	96	FETCH_OP_ST_RAW, /* Raw: .size */
	97	FETCH_OP_ST_MEM, /* Mem: .offset, .size */
	98	FETCH_OP_ST_STRING, /* String: .offset, .size */
	99	// Stage 4 (modify) op
	100	FETCH_OP_MOD_BF, /* Bitfield: .basesize, .lshift, .rshift */
40b53b77 MH	101	// Stage 5 (loop) op
40b53b77 MH	102	FETCH_OP_LP_ARRAY, /* Array: .param = loop count */
53305928	103	FETCH_OP_END,
a6682814	104	FETCH_NOP_SYMBOL, /* Unresolved Symbol holder */
8ab83f56 SD	105	};
8ab83f56 SD	106
53305928 MH	107	struct fetch_insn {
	108	enum fetch_op op;
	109	union {
	110	unsigned int param;
	111	struct {
	112	unsigned int size;
	113	int offset;
	114	};
	115	struct {
	116	unsigned char basesize;
	117	unsigned char lshift;
	118	unsigned char rshift;
	119	};
	120	unsigned long immediate;
a6682814	121	void *data;
53305928 MH	122	};
	123	};
	124
	125	/* fetch + derefN + store + mod + end <= 16, this allows N=12, enough /
	126	#define FETCH_INSN_MAX 16
	127
8ab83f56 SD	128	/* Fetch type information table */
	129	struct fetch_type {
	130	const char name; / Name of type */
	131	size_t size; /* Byte size of type */
	132	int is_signed; /* Signed flag */
	133	print_type_func_t print; /* Print functions */
	134	const char fmt; / Fromat string */
	135	const char fmttype; / Name in format file */
8ab83f56 SD	136	};
8ab83f56 SD	137
34fee3a1 NK	138	/* For defining macros, define string/string_size types */
	139	typedef u32 string;
	140	typedef u32 string_size;
	141
b26c74e1 NK	142	#define PRINT_TYPE_FUNC_NAME(type) print_type_##type
	143	#define PRINT_TYPE_FMT_NAME(type) print_type_format_##type
	144
	145	/* Printing in basic type function template */
	146	#define DECLARE_BASIC_PRINT_TYPE_FUNC(type) \
56de7630	147	int PRINT_TYPE_FUNC_NAME(type)(struct trace_seq s, void data, void *ent);\
b26c74e1 NK	148	extern const char PRINT_TYPE_FMT_NAME(type)[]
	149
	150	DECLARE_BASIC_PRINT_TYPE_FUNC(u8);
	151	DECLARE_BASIC_PRINT_TYPE_FUNC(u16);
	152	DECLARE_BASIC_PRINT_TYPE_FUNC(u32);
	153	DECLARE_BASIC_PRINT_TYPE_FUNC(u64);
	154	DECLARE_BASIC_PRINT_TYPE_FUNC(s8);
	155	DECLARE_BASIC_PRINT_TYPE_FUNC(s16);
	156	DECLARE_BASIC_PRINT_TYPE_FUNC(s32);
	157	DECLARE_BASIC_PRINT_TYPE_FUNC(s64);
17ce3dc7 MH	158	DECLARE_BASIC_PRINT_TYPE_FUNC(x8);
	159	DECLARE_BASIC_PRINT_TYPE_FUNC(x16);
	160	DECLARE_BASIC_PRINT_TYPE_FUNC(x32);
	161	DECLARE_BASIC_PRINT_TYPE_FUNC(x64);
	162
b26c74e1	163	DECLARE_BASIC_PRINT_TYPE_FUNC(string);
60c2e0ce	164	DECLARE_BASIC_PRINT_TYPE_FUNC(symbol);
b26c74e1 NK	165
b26c74e1 NK	166	/* Default (unsigned long) fetch type */
bdca79c2	167	#define __DEFAULT_FETCH_TYPE(t) x##t
b26c74e1 NK	168	#define _DEFAULT_FETCH_TYPE(t) __DEFAULT_FETCH_TYPE(t)
	169	#define DEFAULT_FETCH_TYPE _DEFAULT_FETCH_TYPE(BITS_PER_LONG)
	170	#define DEFAULT_FETCH_TYPE_STR __stringify(DEFAULT_FETCH_TYPE)
	171
60c2e0ce MH	172	#define __ADDR_FETCH_TYPE(t) u##t
	173	#define _ADDR_FETCH_TYPE(t) __ADDR_FETCH_TYPE(t)
	174	#define ADDR_FETCH_TYPE _ADDR_FETCH_TYPE(BITS_PER_LONG)
	175
b26c74e1 NK	176	#define __ASSIGN_FETCH_TYPE(_name, ptype, ftype, _size, sign, _fmttype) \
	177	{.name = _name, \
	178	.size = _size, \
	179	.is_signed = sign, \
	180	.print = PRINT_TYPE_FUNC_NAME(ptype), \
	181	.fmt = PRINT_TYPE_FMT_NAME(ptype), \
	182	.fmttype = _fmttype, \
b26c74e1	183	}
60c2e0ce MH	184	#define _ASSIGN_FETCH_TYPE(_name, ptype, ftype, _size, sign, _fmttype) \
60c2e0ce MH	185	__ASSIGN_FETCH_TYPE(_name, ptype, ftype, _size, sign, #_fmttype)
b26c74e1	186	#define ASSIGN_FETCH_TYPE(ptype, ftype, sign) \
60c2e0ce	187	_ASSIGN_FETCH_TYPE(#ptype, ptype, ftype, sizeof(ftype), sign, ptype)
b26c74e1	188
17ce3dc7 MH	189	/* If ptype is an alias of atype, use this macro (show atype in format) */
17ce3dc7 MH	190	#define ASSIGN_FETCH_TYPE_ALIAS(ptype, atype, ftype, sign) \
60c2e0ce	191	_ASSIGN_FETCH_TYPE(#ptype, ptype, ftype, sizeof(ftype), sign, atype)
17ce3dc7	192
34fee3a1	193	#define ASSIGN_FETCH_TYPE_END {}
40b53b77	194	#define MAX_ARRAY_LEN 64
34fee3a1	195
6b0b7551	196	#ifdef CONFIG_KPROBE_EVENTS
b4da3340 MH	197	bool trace_kprobe_on_func_entry(struct trace_event_call *call);
b4da3340 MH	198	bool trace_kprobe_error_injectable(struct trace_event_call *call);
1301a44e	199	#else
b4da3340	200	static inline bool trace_kprobe_on_func_entry(struct trace_event_call *call)
9802d865	201	{
b4da3340	202	return false;
9802d865 JB	203	}
9802d865 JB	204
b4da3340	205	static inline bool trace_kprobe_error_injectable(struct trace_event_call *call)
9802d865	206	{
b4da3340	207	return false;
9802d865	208	}
6b0b7551	209	#endif /* CONFIG_KPROBE_EVENTS */
1301a44e	210
8ab83f56	211	struct probe_arg {
53305928 MH	212	struct fetch_insn *code;
53305928 MH	213	bool dynamic;/* Dynamic array (string) is used */
8ab83f56	214	unsigned int offset; /* Offset from argument entry */
40b53b77	215	unsigned int count; /* Array count */
8ab83f56 SD	216	const char name; / Name of this argument */
8ab83f56 SD	217	const char comm; / Command of this argument */
40b53b77	218	char fmt; / Format string if needed */
8ab83f56 SD	219	const struct fetch_type type; / Type of this argument */
	220	};
	221
c31ffb3f NK	222	struct trace_probe {
c31ffb3f NK	223	unsigned int flags; /* For TP_FLAG_* */
2425bcb9 SRRH	224	struct trace_event_class class;
2425bcb9 SRRH	225	struct trace_event_call call;
c31ffb3f NK	226	struct list_head files;
	227	ssize_t size; /* trace entry size */
	228	unsigned int nr_args;
	229	struct probe_arg args[];
	230	};
	231
70ed91c6	232	struct event_file_link {
7f1d2f82	233	struct trace_event_file *file;
70ed91c6 J	234	struct list_head list;
	235	};
	236
c31ffb3f NK	237	static inline bool trace_probe_is_enabled(struct trace_probe *tp)
	238	{
	239	return !!(tp->flags & (TP_FLAG_TRACE \| TP_FLAG_PROFILE));
	240	}
	241
	242	static inline bool trace_probe_is_registered(struct trace_probe *tp)
	243	{
	244	return !!(tp->flags & TP_FLAG_REGISTERED);
	245	}
	246
8ab83f56	247	/* Check the name is good for event/group/fields */
f0132c4e	248	static inline bool is_good_name(const char *name)
8ab83f56 SD	249	{
8ab83f56 SD	250	if (!isalpha(name) && name != '_')
f0132c4e	251	return false;
8ab83f56 SD	252	while (*++name != '\0') {
8ab83f56 SD	253	if (!isalpha(name) && !isdigit(name) && *name != '_')
f0132c4e	254	return false;
8ab83f56	255	}
f0132c4e	256	return true;
8ab83f56 SD	257	}
8ab83f56 SD	258
70ed91c6	259	static inline struct event_file_link *
7f1d2f82	260	find_event_file_link(struct trace_probe tp, struct trace_event_file file)
70ed91c6 J	261	{
	262	struct event_file_link *link;
	263
	264	list_for_each_entry(link, &tp->files, list)
	265	if (link->file == file)
	266	return link;
	267
	268	return NULL;
	269	}
	270
a1303af5 MH	271	#define TPARG_FL_RETURN BIT(0)
	272	#define TPARG_FL_KERNEL BIT(1)
	273	#define TPARG_FL_FENTRY BIT(2)
	274	#define TPARG_FL_MASK GENMASK(2, 0)
	275
d00bbea9 MH	276	extern int traceprobe_parse_probe_arg(struct trace_probe *tp, int i,
d00bbea9 MH	277	char *arg, unsigned int flags);
8ab83f56	278
a6682814	279	extern int traceprobe_update_arg(struct probe_arg *arg);
8ab83f56 SD	280	extern void traceprobe_free_probe_arg(struct probe_arg *arg);
8ab83f56 SD	281
c5d343b6	282	extern int traceprobe_split_symbol_offset(char symbol, long offset);
6212dd29 MH	283	extern int traceprobe_parse_event_name(const char **pevent,
6212dd29 MH	284	const char *pgroup, char buf);
8ab83f56	285
0a46c854	286	extern int traceprobe_set_print_fmt(struct trace_probe *tp, bool is_return);
e12f03d7 SL	287
	288	#ifdef CONFIG_PERF_EVENTS
	289	extern struct trace_event_call *
	290	create_local_trace_kprobe(char func, void addr, unsigned long offs,
	291	bool is_return);
	292	extern void destroy_local_trace_kprobe(struct trace_event_call *event_call);
33ea4b24 SL	293
33ea4b24 SL	294	extern struct trace_event_call *
a6ca88b2 SL	295	create_local_trace_uprobe(char *name, unsigned long offs,
a6ca88b2 SL	296	unsigned long ref_ctr_offset, bool is_return);
33ea4b24	297	extern void destroy_local_trace_uprobe(struct trace_event_call *event_call);
e12f03d7	298	#endif
eeb07b06 MH	299	extern int traceprobe_define_arg_fields(struct trace_event_call *event_call,
eeb07b06 MH	300	size_t offset, struct trace_probe *tp);