tracing: Remove ksym tracer
[linux-2.6.git] / kernel / trace / trace.h
1 #ifndef _LINUX_KERNEL_TRACE_H
2 #define _LINUX_KERNEL_TRACE_H
3
4 #include <linux/fs.h>
5 #include <asm/atomic.h>
6 #include <linux/sched.h>
7 #include <linux/clocksource.h>
8 #include <linux/ring_buffer.h>
9 #include <linux/mmiotrace.h>
10 #include <linux/tracepoint.h>
11 #include <linux/ftrace.h>
12 #include <linux/hw_breakpoint.h>
13 #include <linux/trace_seq.h>
14 #include <linux/ftrace_event.h>
15
16 enum trace_type {
17         __TRACE_FIRST_TYPE = 0,
18
19         TRACE_FN,
20         TRACE_CTX,
21         TRACE_WAKE,
22         TRACE_STACK,
23         TRACE_PRINT,
24         TRACE_BPRINT,
25         TRACE_SPECIAL,
26         TRACE_MMIO_RW,
27         TRACE_MMIO_MAP,
28         TRACE_BRANCH,
29         TRACE_GRAPH_RET,
30         TRACE_GRAPH_ENT,
31         TRACE_USER_STACK,
32         TRACE_BLK,
33
34         __TRACE_LAST_TYPE,
35 };
36
37
38 #undef __field
39 #define __field(type, item)             type    item;
40
41 #undef __field_struct
42 #define __field_struct(type, item)      __field(type, item)
43
44 #undef __field_desc
45 #define __field_desc(type, container, item)
46
47 #undef __array
48 #define __array(type, item, size)       type    item[size];
49
50 #undef __array_desc
51 #define __array_desc(type, container, item, size)
52
53 #undef __dynamic_array
54 #define __dynamic_array(type, item)     type    item[];
55
56 #undef F_STRUCT
57 #define F_STRUCT(args...)               args
58
59 #undef FTRACE_ENTRY
60 #define FTRACE_ENTRY(name, struct_name, id, tstruct, print)     \
61         struct struct_name {                                    \
62                 struct trace_entry      ent;                    \
63                 tstruct                                         \
64         }
65
66 #undef TP_ARGS
67 #define TP_ARGS(args...)        args
68
69 #undef FTRACE_ENTRY_DUP
70 #define FTRACE_ENTRY_DUP(name, name_struct, id, tstruct, printk)
71
72 #include "trace_entries.h"
73
74 /*
75  * syscalls are special, and need special handling, this is why
76  * they are not included in trace_entries.h
77  */
78 struct syscall_trace_enter {
79         struct trace_entry      ent;
80         int                     nr;
81         unsigned long           args[];
82 };
83
84 struct syscall_trace_exit {
85         struct trace_entry      ent;
86         int                     nr;
87         long                    ret;
88 };
89
90 struct kprobe_trace_entry_head {
91         struct trace_entry      ent;
92         unsigned long           ip;
93 };
94
95 struct kretprobe_trace_entry_head {
96         struct trace_entry      ent;
97         unsigned long           func;
98         unsigned long           ret_ip;
99 };
100
101 /*
102  * trace_flag_type is an enumeration that holds different
103  * states when a trace occurs. These are:
104  *  IRQS_OFF            - interrupts were disabled
105  *  IRQS_NOSUPPORT      - arch does not support irqs_disabled_flags
106  *  NEED_RESCHED        - reschedule is requested
107  *  HARDIRQ             - inside an interrupt handler
108  *  SOFTIRQ             - inside a softirq handler
109  */
110 enum trace_flag_type {
111         TRACE_FLAG_IRQS_OFF             = 0x01,
112         TRACE_FLAG_IRQS_NOSUPPORT       = 0x02,
113         TRACE_FLAG_NEED_RESCHED         = 0x04,
114         TRACE_FLAG_HARDIRQ              = 0x08,
115         TRACE_FLAG_SOFTIRQ              = 0x10,
116 };
117
118 #define TRACE_BUF_SIZE          1024
119
120 /*
121  * The CPU trace array - it consists of thousands of trace entries
122  * plus some other descriptor data: (for example which task started
123  * the trace, etc.)
124  */
125 struct trace_array_cpu {
126         atomic_t                disabled;
127         void                    *buffer_page;   /* ring buffer spare */
128
129         unsigned long           saved_latency;
130         unsigned long           critical_start;
131         unsigned long           critical_end;
132         unsigned long           critical_sequence;
133         unsigned long           nice;
134         unsigned long           policy;
135         unsigned long           rt_priority;
136         unsigned long           skipped_entries;
137         cycle_t                 preempt_timestamp;
138         pid_t                   pid;
139         uid_t                   uid;
140         char                    comm[TASK_COMM_LEN];
141 };
142
143 /*
144  * The trace array - an array of per-CPU trace arrays. This is the
145  * highest level data structure that individual tracers deal with.
146  * They have on/off state as well:
147  */
148 struct trace_array {
149         struct ring_buffer      *buffer;
150         unsigned long           entries;
151         int                     cpu;
152         cycle_t                 time_start;
153         struct task_struct      *waiter;
154         struct trace_array_cpu  *data[NR_CPUS];
155 };
156
157 #define FTRACE_CMP_TYPE(var, type) \
158         __builtin_types_compatible_p(typeof(var), type *)
159
160 #undef IF_ASSIGN
161 #define IF_ASSIGN(var, entry, etype, id)                \
162         if (FTRACE_CMP_TYPE(var, etype)) {              \
163                 var = (typeof(var))(entry);             \
164                 WARN_ON(id && (entry)->type != id);     \
165                 break;                                  \
166         }
167
168 /* Will cause compile errors if type is not found. */
169 extern void __ftrace_bad_type(void);
170
171 /*
172  * The trace_assign_type is a verifier that the entry type is
173  * the same as the type being assigned. To add new types simply
174  * add a line with the following format:
175  *
176  * IF_ASSIGN(var, ent, type, id);
177  *
178  *  Where "type" is the trace type that includes the trace_entry
179  *  as the "ent" item. And "id" is the trace identifier that is
180  *  used in the trace_type enum.
181  *
182  *  If the type can have more than one id, then use zero.
183  */
184 #define trace_assign_type(var, ent)                                     \
185         do {                                                            \
186                 IF_ASSIGN(var, ent, struct ftrace_entry, TRACE_FN);     \
187                 IF_ASSIGN(var, ent, struct ctx_switch_entry, 0);        \
188                 IF_ASSIGN(var, ent, struct stack_entry, TRACE_STACK);   \
189                 IF_ASSIGN(var, ent, struct userstack_entry, TRACE_USER_STACK);\
190                 IF_ASSIGN(var, ent, struct print_entry, TRACE_PRINT);   \
191                 IF_ASSIGN(var, ent, struct bprint_entry, TRACE_BPRINT); \
192                 IF_ASSIGN(var, ent, struct special_entry, 0);           \
193                 IF_ASSIGN(var, ent, struct trace_mmiotrace_rw,          \
194                           TRACE_MMIO_RW);                               \
195                 IF_ASSIGN(var, ent, struct trace_mmiotrace_map,         \
196                           TRACE_MMIO_MAP);                              \
197                 IF_ASSIGN(var, ent, struct trace_branch, TRACE_BRANCH); \
198                 IF_ASSIGN(var, ent, struct ftrace_graph_ent_entry,      \
199                           TRACE_GRAPH_ENT);             \
200                 IF_ASSIGN(var, ent, struct ftrace_graph_ret_entry,      \
201                           TRACE_GRAPH_RET);             \
202                 __ftrace_bad_type();                                    \
203         } while (0)
204
205 /*
206  * An option specific to a tracer. This is a boolean value.
207  * The bit is the bit index that sets its value on the
208  * flags value in struct tracer_flags.
209  */
210 struct tracer_opt {
211         const char      *name; /* Will appear on the trace_options file */
212         u32             bit; /* Mask assigned in val field in tracer_flags */
213 };
214
215 /*
216  * The set of specific options for a tracer. Your tracer
217  * have to set the initial value of the flags val.
218  */
219 struct tracer_flags {
220         u32                     val;
221         struct tracer_opt       *opts;
222 };
223
224 /* Makes more easy to define a tracer opt */
225 #define TRACER_OPT(s, b)        .name = #s, .bit = b
226
227
228 /**
229  * struct tracer - a specific tracer and its callbacks to interact with debugfs
230  * @name: the name chosen to select it on the available_tracers file
231  * @init: called when one switches to this tracer (echo name > current_tracer)
232  * @reset: called when one switches to another tracer
233  * @start: called when tracing is unpaused (echo 1 > tracing_enabled)
234  * @stop: called when tracing is paused (echo 0 > tracing_enabled)
235  * @open: called when the trace file is opened
236  * @pipe_open: called when the trace_pipe file is opened
237  * @wait_pipe: override how the user waits for traces on trace_pipe
238  * @close: called when the trace file is released
239  * @pipe_close: called when the trace_pipe file is released
240  * @read: override the default read callback on trace_pipe
241  * @splice_read: override the default splice_read callback on trace_pipe
242  * @selftest: selftest to run on boot (see trace_selftest.c)
243  * @print_headers: override the first lines that describe your columns
244  * @print_line: callback that prints a trace
245  * @set_flag: signals one of your private flags changed (trace_options file)
246  * @flags: your private flags
247  */
248 struct tracer {
249         const char              *name;
250         int                     (*init)(struct trace_array *tr);
251         void                    (*reset)(struct trace_array *tr);
252         void                    (*start)(struct trace_array *tr);
253         void                    (*stop)(struct trace_array *tr);
254         void                    (*open)(struct trace_iterator *iter);
255         void                    (*pipe_open)(struct trace_iterator *iter);
256         void                    (*wait_pipe)(struct trace_iterator *iter);
257         void                    (*close)(struct trace_iterator *iter);
258         void                    (*pipe_close)(struct trace_iterator *iter);
259         ssize_t                 (*read)(struct trace_iterator *iter,
260                                         struct file *filp, char __user *ubuf,
261                                         size_t cnt, loff_t *ppos);
262         ssize_t                 (*splice_read)(struct trace_iterator *iter,
263                                                struct file *filp,
264                                                loff_t *ppos,
265                                                struct pipe_inode_info *pipe,
266                                                size_t len,
267                                                unsigned int flags);
268 #ifdef CONFIG_FTRACE_STARTUP_TEST
269         int                     (*selftest)(struct tracer *trace,
270                                             struct trace_array *tr);
271 #endif
272         void                    (*print_header)(struct seq_file *m);
273         enum print_line_t       (*print_line)(struct trace_iterator *iter);
274         /* If you handled the flag setting, return 0 */
275         int                     (*set_flag)(u32 old_flags, u32 bit, int set);
276         struct tracer           *next;
277         int                     print_max;
278         struct tracer_flags     *flags;
279 };
280
281
282 #define TRACE_PIPE_ALL_CPU      -1
283
284 int tracer_init(struct tracer *t, struct trace_array *tr);
285 int tracing_is_enabled(void);
286 void trace_wake_up(void);
287 void tracing_reset(struct trace_array *tr, int cpu);
288 void tracing_reset_online_cpus(struct trace_array *tr);
289 void tracing_reset_current(int cpu);
290 void tracing_reset_current_online_cpus(void);
291 int tracing_open_generic(struct inode *inode, struct file *filp);
292 struct dentry *trace_create_file(const char *name,
293                                  mode_t mode,
294                                  struct dentry *parent,
295                                  void *data,
296                                  const struct file_operations *fops);
297
298 struct dentry *tracing_init_dentry(void);
299 void init_tracer_sysprof_debugfs(struct dentry *d_tracer);
300
301 struct ring_buffer_event;
302
303 struct ring_buffer_event *
304 trace_buffer_lock_reserve(struct ring_buffer *buffer,
305                           int type,
306                           unsigned long len,
307                           unsigned long flags,
308                           int pc);
309 void trace_buffer_unlock_commit(struct ring_buffer *buffer,
310                                 struct ring_buffer_event *event,
311                                 unsigned long flags, int pc);
312
313 struct trace_entry *tracing_get_trace_entry(struct trace_array *tr,
314                                                 struct trace_array_cpu *data);
315
316 struct trace_entry *trace_find_next_entry(struct trace_iterator *iter,
317                                           int *ent_cpu, u64 *ent_ts);
318
319 void default_wait_pipe(struct trace_iterator *iter);
320 void poll_wait_pipe(struct trace_iterator *iter);
321
322 void ftrace(struct trace_array *tr,
323                             struct trace_array_cpu *data,
324                             unsigned long ip,
325                             unsigned long parent_ip,
326                             unsigned long flags, int pc);
327 void tracing_sched_switch_trace(struct trace_array *tr,
328                                 struct task_struct *prev,
329                                 struct task_struct *next,
330                                 unsigned long flags, int pc);
331
332 void tracing_sched_wakeup_trace(struct trace_array *tr,
333                                 struct task_struct *wakee,
334                                 struct task_struct *cur,
335                                 unsigned long flags, int pc);
336 void trace_special(struct trace_array *tr,
337                    struct trace_array_cpu *data,
338                    unsigned long arg1,
339                    unsigned long arg2,
340                    unsigned long arg3, int pc);
341 void trace_function(struct trace_array *tr,
342                     unsigned long ip,
343                     unsigned long parent_ip,
344                     unsigned long flags, int pc);
345 void trace_default_header(struct seq_file *m);
346 void print_trace_header(struct seq_file *m, struct trace_iterator *iter);
347 int trace_empty(struct trace_iterator *iter);
348
349 void trace_graph_return(struct ftrace_graph_ret *trace);
350 int trace_graph_entry(struct ftrace_graph_ent *trace);
351 void set_graph_array(struct trace_array *tr);
352
353 void tracing_start_cmdline_record(void);
354 void tracing_stop_cmdline_record(void);
355 void tracing_sched_switch_assign_trace(struct trace_array *tr);
356 void tracing_stop_sched_switch_record(void);
357 void tracing_start_sched_switch_record(void);
358 int register_tracer(struct tracer *type);
359 void unregister_tracer(struct tracer *type);
360 int is_tracing_stopped(void);
361
362 extern unsigned long nsecs_to_usecs(unsigned long nsecs);
363
364 extern unsigned long tracing_thresh;
365
366 #ifdef CONFIG_TRACER_MAX_TRACE
367 extern unsigned long tracing_max_latency;
368
369 void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu);
370 void update_max_tr_single(struct trace_array *tr,
371                           struct task_struct *tsk, int cpu);
372 #endif /* CONFIG_TRACER_MAX_TRACE */
373
374 #ifdef CONFIG_STACKTRACE
375 void ftrace_trace_stack(struct ring_buffer *buffer, unsigned long flags,
376                         int skip, int pc);
377
378 void ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags,
379                             int pc);
380
381 void __trace_stack(struct trace_array *tr, unsigned long flags, int skip,
382                    int pc);
383 #else
384 static inline void ftrace_trace_stack(struct ring_buffer *buffer,
385                                       unsigned long flags, int skip, int pc)
386 {
387 }
388
389 static inline void ftrace_trace_userstack(struct ring_buffer *buffer,
390                                           unsigned long flags, int pc)
391 {
392 }
393
394 static inline void __trace_stack(struct trace_array *tr, unsigned long flags,
395                                  int skip, int pc)
396 {
397 }
398 #endif /* CONFIG_STACKTRACE */
399
400 extern cycle_t ftrace_now(int cpu);
401
402 extern void trace_find_cmdline(int pid, char comm[]);
403
404 #ifdef CONFIG_DYNAMIC_FTRACE
405 extern unsigned long ftrace_update_tot_cnt;
406 #define DYN_FTRACE_TEST_NAME trace_selftest_dynamic_test_func
407 extern int DYN_FTRACE_TEST_NAME(void);
408 #endif
409
410 extern int ring_buffer_expanded;
411 extern bool tracing_selftest_disabled;
412 DECLARE_PER_CPU(int, ftrace_cpu_disabled);
413
414 #ifdef CONFIG_FTRACE_STARTUP_TEST
415 extern int trace_selftest_startup_function(struct tracer *trace,
416                                            struct trace_array *tr);
417 extern int trace_selftest_startup_function_graph(struct tracer *trace,
418                                                  struct trace_array *tr);
419 extern int trace_selftest_startup_irqsoff(struct tracer *trace,
420                                           struct trace_array *tr);
421 extern int trace_selftest_startup_preemptoff(struct tracer *trace,
422                                              struct trace_array *tr);
423 extern int trace_selftest_startup_preemptirqsoff(struct tracer *trace,
424                                                  struct trace_array *tr);
425 extern int trace_selftest_startup_wakeup(struct tracer *trace,
426                                          struct trace_array *tr);
427 extern int trace_selftest_startup_nop(struct tracer *trace,
428                                          struct trace_array *tr);
429 extern int trace_selftest_startup_sched_switch(struct tracer *trace,
430                                                struct trace_array *tr);
431 extern int trace_selftest_startup_sysprof(struct tracer *trace,
432                                                struct trace_array *tr);
433 extern int trace_selftest_startup_branch(struct tracer *trace,
434                                          struct trace_array *tr);
435 #endif /* CONFIG_FTRACE_STARTUP_TEST */
436
437 extern void *head_page(struct trace_array_cpu *data);
438 extern unsigned long long ns2usecs(cycle_t nsec);
439 extern int
440 trace_vbprintk(unsigned long ip, const char *fmt, va_list args);
441 extern int
442 trace_vprintk(unsigned long ip, const char *fmt, va_list args);
443 extern int
444 trace_array_vprintk(struct trace_array *tr,
445                     unsigned long ip, const char *fmt, va_list args);
446 int trace_array_printk(struct trace_array *tr,
447                        unsigned long ip, const char *fmt, ...);
448
449 extern unsigned long trace_flags;
450
451 extern int trace_clock_id;
452
453 /* Standard output formatting function used for function return traces */
454 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
455
456 /* Flag options */
457 #define TRACE_GRAPH_PRINT_OVERRUN       0x1
458 #define TRACE_GRAPH_PRINT_CPU           0x2
459 #define TRACE_GRAPH_PRINT_OVERHEAD      0x4
460 #define TRACE_GRAPH_PRINT_PROC          0x8
461 #define TRACE_GRAPH_PRINT_DURATION      0x10
462 #define TRACE_GRAPH_PRINT_ABS_TIME      0x20
463
464 extern enum print_line_t
465 print_graph_function_flags(struct trace_iterator *iter, u32 flags);
466 extern void print_graph_headers_flags(struct seq_file *s, u32 flags);
467 extern enum print_line_t
468 trace_print_graph_duration(unsigned long long duration, struct trace_seq *s);
469 extern void graph_trace_open(struct trace_iterator *iter);
470 extern void graph_trace_close(struct trace_iterator *iter);
471 extern int __trace_graph_entry(struct trace_array *tr,
472                                struct ftrace_graph_ent *trace,
473                                unsigned long flags, int pc);
474 extern void __trace_graph_return(struct trace_array *tr,
475                                  struct ftrace_graph_ret *trace,
476                                  unsigned long flags, int pc);
477
478
479 #ifdef CONFIG_DYNAMIC_FTRACE
480 /* TODO: make this variable */
481 #define FTRACE_GRAPH_MAX_FUNCS          32
482 extern int ftrace_graph_filter_enabled;
483 extern int ftrace_graph_count;
484 extern unsigned long ftrace_graph_funcs[FTRACE_GRAPH_MAX_FUNCS];
485
486 static inline int ftrace_graph_addr(unsigned long addr)
487 {
488         int i;
489
490         if (!ftrace_graph_filter_enabled)
491                 return 1;
492
493         for (i = 0; i < ftrace_graph_count; i++) {
494                 if (addr == ftrace_graph_funcs[i])
495                         return 1;
496         }
497
498         return 0;
499 }
500 #else
501 static inline int ftrace_graph_addr(unsigned long addr)
502 {
503         return 1;
504 }
505 #endif /* CONFIG_DYNAMIC_FTRACE */
506 #else /* CONFIG_FUNCTION_GRAPH_TRACER */
507 static inline enum print_line_t
508 print_graph_function_flags(struct trace_iterator *iter, u32 flags)
509 {
510         return TRACE_TYPE_UNHANDLED;
511 }
512 #endif /* CONFIG_FUNCTION_GRAPH_TRACER */
513
514 extern struct list_head ftrace_pids;
515
516 #ifdef CONFIG_FUNCTION_TRACER
517 static inline int ftrace_trace_task(struct task_struct *task)
518 {
519         if (list_empty(&ftrace_pids))
520                 return 1;
521
522         return test_tsk_trace_trace(task);
523 }
524 #else
525 static inline int ftrace_trace_task(struct task_struct *task)
526 {
527         return 1;
528 }
529 #endif
530
531 /*
532  * struct trace_parser - servers for reading the user input separated by spaces
533  * @cont: set if the input is not complete - no final space char was found
534  * @buffer: holds the parsed user input
535  * @idx: user input length
536  * @size: buffer size
537  */
538 struct trace_parser {
539         bool            cont;
540         char            *buffer;
541         unsigned        idx;
542         unsigned        size;
543 };
544
545 static inline bool trace_parser_loaded(struct trace_parser *parser)
546 {
547         return (parser->idx != 0);
548 }
549
550 static inline bool trace_parser_cont(struct trace_parser *parser)
551 {
552         return parser->cont;
553 }
554
555 static inline void trace_parser_clear(struct trace_parser *parser)
556 {
557         parser->cont = false;
558         parser->idx = 0;
559 }
560
561 extern int trace_parser_get_init(struct trace_parser *parser, int size);
562 extern void trace_parser_put(struct trace_parser *parser);
563 extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
564         size_t cnt, loff_t *ppos);
565
566 /*
567  * trace_iterator_flags is an enumeration that defines bit
568  * positions into trace_flags that controls the output.
569  *
570  * NOTE: These bits must match the trace_options array in
571  *       trace.c.
572  */
573 enum trace_iterator_flags {
574         TRACE_ITER_PRINT_PARENT         = 0x01,
575         TRACE_ITER_SYM_OFFSET           = 0x02,
576         TRACE_ITER_SYM_ADDR             = 0x04,
577         TRACE_ITER_VERBOSE              = 0x08,
578         TRACE_ITER_RAW                  = 0x10,
579         TRACE_ITER_HEX                  = 0x20,
580         TRACE_ITER_BIN                  = 0x40,
581         TRACE_ITER_BLOCK                = 0x80,
582         TRACE_ITER_STACKTRACE           = 0x100,
583         TRACE_ITER_PRINTK               = 0x200,
584         TRACE_ITER_PREEMPTONLY          = 0x400,
585         TRACE_ITER_BRANCH               = 0x800,
586         TRACE_ITER_ANNOTATE             = 0x1000,
587         TRACE_ITER_USERSTACKTRACE       = 0x2000,
588         TRACE_ITER_SYM_USEROBJ          = 0x4000,
589         TRACE_ITER_PRINTK_MSGONLY       = 0x8000,
590         TRACE_ITER_CONTEXT_INFO         = 0x10000, /* Print pid/cpu/time */
591         TRACE_ITER_LATENCY_FMT          = 0x20000,
592         TRACE_ITER_SLEEP_TIME           = 0x40000,
593         TRACE_ITER_GRAPH_TIME           = 0x80000,
594 };
595
596 /*
597  * TRACE_ITER_SYM_MASK masks the options in trace_flags that
598  * control the output of kernel symbols.
599  */
600 #define TRACE_ITER_SYM_MASK \
601         (TRACE_ITER_PRINT_PARENT|TRACE_ITER_SYM_OFFSET|TRACE_ITER_SYM_ADDR)
602
603 extern struct tracer nop_trace;
604
605 #ifdef CONFIG_BRANCH_TRACER
606 extern int enable_branch_tracing(struct trace_array *tr);
607 extern void disable_branch_tracing(void);
608 static inline int trace_branch_enable(struct trace_array *tr)
609 {
610         if (trace_flags & TRACE_ITER_BRANCH)
611                 return enable_branch_tracing(tr);
612         return 0;
613 }
614 static inline void trace_branch_disable(void)
615 {
616         /* due to races, always disable */
617         disable_branch_tracing();
618 }
619 #else
620 static inline int trace_branch_enable(struct trace_array *tr)
621 {
622         return 0;
623 }
624 static inline void trace_branch_disable(void)
625 {
626 }
627 #endif /* CONFIG_BRANCH_TRACER */
628
629 /* set ring buffers to default size if not already done so */
630 int tracing_update_buffers(void);
631
632 /* trace event type bit fields, not numeric */
633 enum {
634         TRACE_EVENT_TYPE_PRINTF         = 1,
635         TRACE_EVENT_TYPE_RAW            = 2,
636 };
637
638 struct ftrace_event_field {
639         struct list_head        link;
640         char                    *name;
641         char                    *type;
642         int                     filter_type;
643         int                     offset;
644         int                     size;
645         int                     is_signed;
646 };
647
648 struct event_filter {
649         int                     n_preds;
650         struct filter_pred      **preds;
651         char                    *filter_string;
652 };
653
654 struct event_subsystem {
655         struct list_head        list;
656         const char              *name;
657         struct dentry           *entry;
658         struct event_filter     *filter;
659         int                     nr_events;
660 };
661
662 struct filter_pred;
663 struct regex;
664
665 typedef int (*filter_pred_fn_t) (struct filter_pred *pred, void *event,
666                                  int val1, int val2);
667
668 typedef int (*regex_match_func)(char *str, struct regex *r, int len);
669
670 enum regex_type {
671         MATCH_FULL = 0,
672         MATCH_FRONT_ONLY,
673         MATCH_MIDDLE_ONLY,
674         MATCH_END_ONLY,
675 };
676
677 struct regex {
678         char                    pattern[MAX_FILTER_STR_VAL];
679         int                     len;
680         int                     field_len;
681         regex_match_func        match;
682 };
683
684 struct filter_pred {
685         filter_pred_fn_t        fn;
686         u64                     val;
687         struct regex            regex;
688         char                    *field_name;
689         int                     offset;
690         int                     not;
691         int                     op;
692         int                     pop_n;
693 };
694
695 extern struct list_head ftrace_common_fields;
696
697 extern enum regex_type
698 filter_parse_regex(char *buff, int len, char **search, int *not);
699 extern void print_event_filter(struct ftrace_event_call *call,
700                                struct trace_seq *s);
701 extern int apply_event_filter(struct ftrace_event_call *call,
702                               char *filter_string);
703 extern int apply_subsystem_event_filter(struct event_subsystem *system,
704                                         char *filter_string);
705 extern void print_subsystem_event_filter(struct event_subsystem *system,
706                                          struct trace_seq *s);
707 extern int filter_assign_type(const char *type);
708
709 struct list_head *
710 trace_get_fields(struct ftrace_event_call *event_call);
711
712 static inline int
713 filter_check_discard(struct ftrace_event_call *call, void *rec,
714                      struct ring_buffer *buffer,
715                      struct ring_buffer_event *event)
716 {
717         if (unlikely(call->flags & TRACE_EVENT_FL_FILTERED) &&
718             !filter_match_preds(call->filter, rec)) {
719                 ring_buffer_discard_commit(buffer, event);
720                 return 1;
721         }
722
723         return 0;
724 }
725
726 extern struct mutex event_mutex;
727 extern struct list_head ftrace_events;
728
729 extern const char *__start___trace_bprintk_fmt[];
730 extern const char *__stop___trace_bprintk_fmt[];
731
732 #undef FTRACE_ENTRY
733 #define FTRACE_ENTRY(call, struct_name, id, tstruct, print)             \
734         extern struct ftrace_event_call                                 \
735         __attribute__((__aligned__(4))) event_##call;
736 #undef FTRACE_ENTRY_DUP
737 #define FTRACE_ENTRY_DUP(call, struct_name, id, tstruct, print)         \
738         FTRACE_ENTRY(call, struct_name, id, PARAMS(tstruct), PARAMS(print))
739 #include "trace_entries.h"
740
741 #endif /* _LINUX_KERNEL_TRACE_H */