2009-04-13 09:20:49 -06:00
|
|
|
#ifndef _LINUX_FTRACE_EVENT_H
|
|
|
|
#define _LINUX_FTRACE_EVENT_H
|
|
|
|
|
|
|
|
#include <linux/trace_seq.h>
|
|
|
|
#include <linux/ring_buffer.h>
|
|
|
|
|
|
|
|
|
|
|
|
struct trace_array;
|
|
|
|
struct tracer;
|
2009-04-10 12:53:50 -06:00
|
|
|
struct dentry;
|
2009-04-13 09:20:49 -06:00
|
|
|
|
|
|
|
/*
|
|
|
|
* The trace entry - the most basic unit of tracing. This is what
|
|
|
|
* is printed in the end as a single line in the trace output, such as:
|
|
|
|
*
|
|
|
|
* bash-15816 [01] 235.197585: idle_cpu <- irq_enter
|
|
|
|
*/
|
|
|
|
struct trace_entry {
|
2009-03-26 09:03:29 -06:00
|
|
|
unsigned short type;
|
2009-04-13 09:20:49 -06:00
|
|
|
unsigned char flags;
|
|
|
|
unsigned char preempt_count;
|
|
|
|
int pid;
|
|
|
|
int tgid;
|
|
|
|
};
|
|
|
|
|
2009-03-26 09:03:29 -06:00
|
|
|
#define FTRACE_MAX_EVENT \
|
|
|
|
((1 << (sizeof(((struct trace_entry *)0)->type) * 8)) - 1)
|
|
|
|
|
2009-04-13 09:20:49 -06:00
|
|
|
/*
|
|
|
|
* Trace iterator - used by printout routines who present trace
|
|
|
|
* results to users and which routines might sleep, etc:
|
|
|
|
*/
|
|
|
|
struct trace_iterator {
|
|
|
|
struct trace_array *tr;
|
|
|
|
struct tracer *trace;
|
|
|
|
void *private;
|
|
|
|
int cpu_file;
|
|
|
|
struct mutex mutex;
|
|
|
|
struct ring_buffer_iter *buffer_iter[NR_CPUS];
|
|
|
|
|
|
|
|
/* The below is zeroed out in pipe_read */
|
|
|
|
struct trace_seq seq;
|
|
|
|
struct trace_entry *ent;
|
|
|
|
int cpu;
|
|
|
|
u64 ts;
|
|
|
|
|
|
|
|
unsigned long iter_flags;
|
|
|
|
loff_t pos;
|
|
|
|
long idx;
|
|
|
|
|
|
|
|
cpumask_var_t started;
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter,
|
|
|
|
int flags);
|
|
|
|
struct trace_event {
|
|
|
|
struct hlist_node node;
|
2009-04-24 10:20:52 -06:00
|
|
|
struct list_head list;
|
2009-04-13 09:20:49 -06:00
|
|
|
int type;
|
|
|
|
trace_print_func trace;
|
|
|
|
trace_print_func raw;
|
|
|
|
trace_print_func hex;
|
|
|
|
trace_print_func binary;
|
|
|
|
};
|
|
|
|
|
|
|
|
extern int register_ftrace_event(struct trace_event *event);
|
|
|
|
extern int unregister_ftrace_event(struct trace_event *event);
|
|
|
|
|
|
|
|
/* Return values for print_line callback */
|
|
|
|
enum print_line_t {
|
|
|
|
TRACE_TYPE_PARTIAL_LINE = 0, /* Retry after flushing the seq */
|
|
|
|
TRACE_TYPE_HANDLED = 1,
|
|
|
|
TRACE_TYPE_UNHANDLED = 2, /* Relay to other output functions */
|
|
|
|
TRACE_TYPE_NO_CONSUME = 3 /* Handled but ask to not consume */
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
struct ring_buffer_event *
|
2009-04-22 02:53:34 -06:00
|
|
|
trace_current_buffer_lock_reserve(int type, unsigned long len,
|
2009-04-13 09:20:49 -06:00
|
|
|
unsigned long flags, int pc);
|
|
|
|
void trace_current_buffer_unlock_commit(struct ring_buffer_event *event,
|
|
|
|
unsigned long flags, int pc);
|
|
|
|
void trace_nowake_buffer_unlock_commit(struct ring_buffer_event *event,
|
|
|
|
unsigned long flags, int pc);
|
|
|
|
void trace_current_buffer_discard_commit(struct ring_buffer_event *event);
|
|
|
|
|
|
|
|
void tracing_record_cmdline(struct task_struct *tsk);
|
|
|
|
|
|
|
|
struct ftrace_event_call {
|
2009-04-10 11:52:20 -06:00
|
|
|
struct list_head list;
|
2009-04-13 09:20:49 -06:00
|
|
|
char *name;
|
|
|
|
char *system;
|
|
|
|
struct dentry *dir;
|
2009-04-10 12:53:50 -06:00
|
|
|
struct trace_event *event;
|
2009-04-13 09:20:49 -06:00
|
|
|
int enabled;
|
|
|
|
int (*regfunc)(void);
|
|
|
|
void (*unregfunc)(void);
|
|
|
|
int id;
|
|
|
|
int (*raw_init)(void);
|
|
|
|
int (*show_format)(struct trace_seq *s);
|
|
|
|
int (*define_fields)(void);
|
|
|
|
struct list_head fields;
|
2009-04-28 02:04:47 -06:00
|
|
|
int filter_active;
|
|
|
|
void *filter;
|
2009-04-10 12:53:50 -06:00
|
|
|
void *mod;
|
2009-04-13 09:20:49 -06:00
|
|
|
|
|
|
|
#ifdef CONFIG_EVENT_PROFILE
|
|
|
|
atomic_t profile_count;
|
|
|
|
int (*profile_enable)(struct ftrace_event_call *);
|
|
|
|
void (*profile_disable)(struct ftrace_event_call *);
|
|
|
|
#endif
|
|
|
|
};
|
|
|
|
|
|
|
|
#define MAX_FILTER_PRED 8
|
|
|
|
#define MAX_FILTER_STR_VAL 128
|
|
|
|
|
|
|
|
extern int init_preds(struct ftrace_event_call *call);
|
|
|
|
extern int filter_match_preds(struct ftrace_event_call *call, void *rec);
|
|
|
|
extern int filter_current_check_discard(struct ftrace_event_call *call,
|
|
|
|
void *rec,
|
|
|
|
struct ring_buffer_event *event);
|
|
|
|
|
|
|
|
extern int trace_define_field(struct ftrace_event_call *call, char *type,
|
|
|
|
char *name, int offset, int size);
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* The double __builtin_constant_p is because gcc will give us an error
|
|
|
|
* if we try to allocate the static variable to fmt if it is not a
|
|
|
|
* constant. Even with the outer if statement optimizing out.
|
|
|
|
*/
|
|
|
|
#define event_trace_printk(ip, fmt, args...) \
|
|
|
|
do { \
|
|
|
|
__trace_printk_check_format(fmt, ##args); \
|
|
|
|
tracing_record_cmdline(current); \
|
|
|
|
if (__builtin_constant_p(fmt)) { \
|
|
|
|
static const char *trace_printk_fmt \
|
|
|
|
__attribute__((section("__trace_printk_fmt"))) = \
|
|
|
|
__builtin_constant_p(fmt) ? fmt : NULL; \
|
|
|
|
\
|
|
|
|
__trace_bprintk(ip, trace_printk_fmt, ##args); \
|
|
|
|
} else \
|
|
|
|
__trace_printk(ip, fmt, ##args); \
|
|
|
|
} while (0)
|
|
|
|
|
|
|
|
#define __common_field(type, item) \
|
|
|
|
ret = trace_define_field(event_call, #type, "common_" #item, \
|
|
|
|
offsetof(typeof(field.ent), item), \
|
|
|
|
sizeof(field.ent.item)); \
|
|
|
|
if (ret) \
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
#endif /* _LINUX_FTRACE_EVENT_H */
|