block,ide: simplify bdops->set_capacity() to ->unlock_native_capacity()
[linux-3.10.git] / include / trace / ftrace.h
1 /*
2  * Stage 1 of the trace events.
3  *
4  * Override the macros in <trace/trace_events.h> to include the following:
5  *
6  * struct ftrace_raw_<call> {
7  *      struct trace_entry              ent;
8  *      <type>                          <item>;
9  *      <type2>                         <item2>[<len>];
10  *      [...]
11  * };
12  *
13  * The <type> <item> is created by the __field(type, item) macro or
14  * the __array(type2, item2, len) macro.
15  * We simply do "type item;", and that will create the fields
16  * in the structure.
17  */
18
19 #include <linux/ftrace_event.h>
20
21 /*
22  * DECLARE_EVENT_CLASS can be used to add a generic function
23  * handlers for events. That is, if all events have the same
24  * parameters and just have distinct trace points.
25  * Each tracepoint can be defined with DEFINE_EVENT and that
26  * will map the DECLARE_EVENT_CLASS to the tracepoint.
27  *
28  * TRACE_EVENT is a one to one mapping between tracepoint and template.
29  */
30 #undef TRACE_EVENT
31 #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
32         DECLARE_EVENT_CLASS(name,                              \
33                              PARAMS(proto),                    \
34                              PARAMS(args),                     \
35                              PARAMS(tstruct),                  \
36                              PARAMS(assign),                   \
37                              PARAMS(print));                   \
38         DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args));
39
40
41 #undef __field
42 #define __field(type, item)             type    item;
43
44 #undef __field_ext
45 #define __field_ext(type, item, filter_type)    type    item;
46
47 #undef __array
48 #define __array(type, item, len)        type    item[len];
49
50 #undef __dynamic_array
51 #define __dynamic_array(type, item, len) u32 __data_loc_##item;
52
53 #undef __string
54 #define __string(item, src) __dynamic_array(char, item, -1)
55
56 #undef TP_STRUCT__entry
57 #define TP_STRUCT__entry(args...) args
58
59 #undef DECLARE_EVENT_CLASS
60 #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print)  \
61         struct ftrace_raw_##name {                                      \
62                 struct trace_entry      ent;                            \
63                 tstruct                                                 \
64                 char                    __data[0];                      \
65         };
66 #undef DEFINE_EVENT
67 #define DEFINE_EVENT(template, name, proto, args)       \
68         static struct ftrace_event_call                 \
69         __attribute__((__aligned__(4))) event_##name
70
71 #undef DEFINE_EVENT_PRINT
72 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
73         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
74
75 #undef __cpparg
76 #define __cpparg(arg...) arg
77
78 /* Callbacks are meaningless to ftrace. */
79 #undef TRACE_EVENT_FN
80 #define TRACE_EVENT_FN(name, proto, args, tstruct,                      \
81                 assign, print, reg, unreg)                              \
82         TRACE_EVENT(name, __cpparg(proto), __cpparg(args),              \
83                 __cpparg(tstruct), __cpparg(assign), __cpparg(print))   \
84
85 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
86
87
88 /*
89  * Stage 2 of the trace events.
90  *
91  * Include the following:
92  *
93  * struct ftrace_data_offsets_<call> {
94  *      u32                             <item1>;
95  *      u32                             <item2>;
96  *      [...]
97  * };
98  *
99  * The __dynamic_array() macro will create each u32 <item>, this is
100  * to keep the offset of each array from the beginning of the event.
101  * The size of an array is also encoded, in the higher 16 bits of <item>.
102  */
103
104 #undef __field
105 #define __field(type, item)
106
107 #undef __field_ext
108 #define __field_ext(type, item, filter_type)
109
110 #undef __array
111 #define __array(type, item, len)
112
113 #undef __dynamic_array
114 #define __dynamic_array(type, item, len)        u32 item;
115
116 #undef __string
117 #define __string(item, src) __dynamic_array(char, item, -1)
118
119 #undef DECLARE_EVENT_CLASS
120 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
121         struct ftrace_data_offsets_##call {                             \
122                 tstruct;                                                \
123         };
124
125 #undef DEFINE_EVENT
126 #define DEFINE_EVENT(template, name, proto, args)
127
128 #undef DEFINE_EVENT_PRINT
129 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
130         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
131
132 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
133
134 /*
135  * Stage 3 of the trace events.
136  *
137  * Override the macros in <trace/trace_events.h> to include the following:
138  *
139  * enum print_line_t
140  * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags)
141  * {
142  *      struct trace_seq *s = &iter->seq;
143  *      struct ftrace_raw_<call> *field; <-- defined in stage 1
144  *      struct trace_entry *entry;
145  *      struct trace_seq *p;
146  *      int ret;
147  *
148  *      entry = iter->ent;
149  *
150  *      if (entry->type != event_<call>.id) {
151  *              WARN_ON_ONCE(1);
152  *              return TRACE_TYPE_UNHANDLED;
153  *      }
154  *
155  *      field = (typeof(field))entry;
156  *
157  *      p = get_cpu_var(ftrace_event_seq);
158  *      trace_seq_init(p);
159  *      ret = trace_seq_printf(s, <TP_printk> "\n");
160  *      put_cpu();
161  *      if (!ret)
162  *              return TRACE_TYPE_PARTIAL_LINE;
163  *
164  *      return TRACE_TYPE_HANDLED;
165  * }
166  *
167  * This is the method used to print the raw event to the trace
168  * output format. Note, this is not needed if the data is read
169  * in binary.
170  */
171
172 #undef __entry
173 #define __entry field
174
175 #undef TP_printk
176 #define TP_printk(fmt, args...) fmt "\n", args
177
178 #undef __get_dynamic_array
179 #define __get_dynamic_array(field)      \
180                 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
181
182 #undef __get_str
183 #define __get_str(field) (char *)__get_dynamic_array(field)
184
185 #undef __print_flags
186 #define __print_flags(flag, delim, flag_array...)                       \
187         ({                                                              \
188                 static const struct trace_print_flags __flags[] =       \
189                         { flag_array, { -1, NULL }};                    \
190                 ftrace_print_flags_seq(p, delim, flag, __flags);        \
191         })
192
193 #undef __print_symbolic
194 #define __print_symbolic(value, symbol_array...)                        \
195         ({                                                              \
196                 static const struct trace_print_flags symbols[] =       \
197                         { symbol_array, { -1, NULL }};                  \
198                 ftrace_print_symbols_seq(p, value, symbols);            \
199         })
200
201 #undef DECLARE_EVENT_CLASS
202 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
203 static notrace enum print_line_t                                        \
204 ftrace_raw_output_id_##call(int event_id, const char *name,             \
205                             struct trace_iterator *iter, int flags)     \
206 {                                                                       \
207         struct trace_seq *s = &iter->seq;                               \
208         struct ftrace_raw_##call *field;                                \
209         struct trace_entry *entry;                                      \
210         struct trace_seq *p;                                            \
211         int ret;                                                        \
212                                                                         \
213         entry = iter->ent;                                              \
214                                                                         \
215         if (entry->type != event_id) {                                  \
216                 WARN_ON_ONCE(1);                                        \
217                 return TRACE_TYPE_UNHANDLED;                            \
218         }                                                               \
219                                                                         \
220         field = (typeof(field))entry;                                   \
221                                                                         \
222         p = &get_cpu_var(ftrace_event_seq);                             \
223         trace_seq_init(p);                                              \
224         ret = trace_seq_printf(s, "%s: ", name);                        \
225         if (ret)                                                        \
226                 ret = trace_seq_printf(s, print);                       \
227         put_cpu();                                                      \
228         if (!ret)                                                       \
229                 return TRACE_TYPE_PARTIAL_LINE;                         \
230                                                                         \
231         return TRACE_TYPE_HANDLED;                                      \
232 }
233
234 #undef DEFINE_EVENT
235 #define DEFINE_EVENT(template, name, proto, args)                       \
236 static notrace enum print_line_t                                        \
237 ftrace_raw_output_##name(struct trace_iterator *iter, int flags)        \
238 {                                                                       \
239         return ftrace_raw_output_id_##template(event_##name.id,         \
240                                                #name, iter, flags);     \
241 }
242
243 #undef DEFINE_EVENT_PRINT
244 #define DEFINE_EVENT_PRINT(template, call, proto, args, print)          \
245 static notrace enum print_line_t                                        \
246 ftrace_raw_output_##call(struct trace_iterator *iter, int flags)        \
247 {                                                                       \
248         struct trace_seq *s = &iter->seq;                               \
249         struct ftrace_raw_##template *field;                            \
250         struct trace_entry *entry;                                      \
251         struct trace_seq *p;                                            \
252         int ret;                                                        \
253                                                                         \
254         entry = iter->ent;                                              \
255                                                                         \
256         if (entry->type != event_##call.id) {                           \
257                 WARN_ON_ONCE(1);                                        \
258                 return TRACE_TYPE_UNHANDLED;                            \
259         }                                                               \
260                                                                         \
261         field = (typeof(field))entry;                                   \
262                                                                         \
263         p = &get_cpu_var(ftrace_event_seq);                             \
264         trace_seq_init(p);                                              \
265         ret = trace_seq_printf(s, "%s: ", #call);                       \
266         if (ret)                                                        \
267                 ret = trace_seq_printf(s, print);                       \
268         put_cpu();                                                      \
269         if (!ret)                                                       \
270                 return TRACE_TYPE_PARTIAL_LINE;                         \
271                                                                         \
272         return TRACE_TYPE_HANDLED;                                      \
273 }
274
275 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
276
277 #undef __field_ext
278 #define __field_ext(type, item, filter_type)                            \
279         ret = trace_define_field(event_call, #type, #item,              \
280                                  offsetof(typeof(field), item),         \
281                                  sizeof(field.item),                    \
282                                  is_signed_type(type), filter_type);    \
283         if (ret)                                                        \
284                 return ret;
285
286 #undef __field
287 #define __field(type, item)     __field_ext(type, item, FILTER_OTHER)
288
289 #undef __array
290 #define __array(type, item, len)                                        \
291         BUILD_BUG_ON(len > MAX_FILTER_STR_VAL);                         \
292         ret = trace_define_field(event_call, #type "[" #len "]", #item, \
293                                  offsetof(typeof(field), item),         \
294                                  sizeof(field.item),                    \
295                                  is_signed_type(type), FILTER_OTHER);   \
296         if (ret)                                                        \
297                 return ret;
298
299 #undef __dynamic_array
300 #define __dynamic_array(type, item, len)                                       \
301         ret = trace_define_field(event_call, "__data_loc " #type "[]", #item,  \
302                                  offsetof(typeof(field), __data_loc_##item),   \
303                                  sizeof(field.__data_loc_##item),              \
304                                  is_signed_type(type), FILTER_OTHER);
305
306 #undef __string
307 #define __string(item, src) __dynamic_array(char, item, -1)
308
309 #undef DECLARE_EVENT_CLASS
310 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print)    \
311 static int notrace                                                      \
312 ftrace_define_fields_##call(struct ftrace_event_call *event_call)       \
313 {                                                                       \
314         struct ftrace_raw_##call field;                                 \
315         int ret;                                                        \
316                                                                         \
317         tstruct;                                                        \
318                                                                         \
319         return ret;                                                     \
320 }
321
322 #undef DEFINE_EVENT
323 #define DEFINE_EVENT(template, name, proto, args)
324
325 #undef DEFINE_EVENT_PRINT
326 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
327         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
328
329 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
330
331 /*
332  * remember the offset of each array from the beginning of the event.
333  */
334
335 #undef __entry
336 #define __entry entry
337
338 #undef __field
339 #define __field(type, item)
340
341 #undef __field_ext
342 #define __field_ext(type, item, filter_type)
343
344 #undef __array
345 #define __array(type, item, len)
346
347 #undef __dynamic_array
348 #define __dynamic_array(type, item, len)                                \
349         __data_offsets->item = __data_size +                            \
350                                offsetof(typeof(*entry), __data);        \
351         __data_offsets->item |= (len * sizeof(type)) << 16;             \
352         __data_size += (len) * sizeof(type);
353
354 #undef __string
355 #define __string(item, src) __dynamic_array(char, item, strlen(src) + 1)
356
357 #undef DECLARE_EVENT_CLASS
358 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
359 static inline notrace int ftrace_get_offsets_##call(                    \
360         struct ftrace_data_offsets_##call *__data_offsets, proto)       \
361 {                                                                       \
362         int __data_size = 0;                                            \
363         struct ftrace_raw_##call __maybe_unused *entry;                 \
364                                                                         \
365         tstruct;                                                        \
366                                                                         \
367         return __data_size;                                             \
368 }
369
370 #undef DEFINE_EVENT
371 #define DEFINE_EVENT(template, name, proto, args)
372
373 #undef DEFINE_EVENT_PRINT
374 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
375         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
376
377 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
378
379 #ifdef CONFIG_PERF_EVENTS
380
381 /*
382  * Generate the functions needed for tracepoint perf_event support.
383  *
384  * NOTE: The insertion profile callback (ftrace_profile_<call>) is defined later
385  *
386  * static int ftrace_profile_enable_<call>(void)
387  * {
388  *      return register_trace_<call>(ftrace_profile_<call>);
389  * }
390  *
391  * static void ftrace_profile_disable_<call>(void)
392  * {
393  *      unregister_trace_<call>(ftrace_profile_<call>);
394  * }
395  *
396  */
397
398 #undef DECLARE_EVENT_CLASS
399 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)
400
401 #undef DEFINE_EVENT
402 #define DEFINE_EVENT(template, name, proto, args)                       \
403                                                                         \
404 static void perf_trace_##name(proto);                                   \
405                                                                         \
406 static notrace int                                                      \
407 perf_trace_enable_##name(struct ftrace_event_call *unused)              \
408 {                                                                       \
409         return register_trace_##name(perf_trace_##name);                \
410 }                                                                       \
411                                                                         \
412 static notrace void                                                     \
413 perf_trace_disable_##name(struct ftrace_event_call *unused)             \
414 {                                                                       \
415         unregister_trace_##name(perf_trace_##name);                     \
416 }
417
418 #undef DEFINE_EVENT_PRINT
419 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
420         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
421
422 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
423
424 #endif /* CONFIG_PERF_EVENTS */
425
426 /*
427  * Stage 4 of the trace events.
428  *
429  * Override the macros in <trace/trace_events.h> to include the following:
430  *
431  * static void ftrace_event_<call>(proto)
432  * {
433  *      event_trace_printk(_RET_IP_, "<call>: " <fmt>);
434  * }
435  *
436  * static int ftrace_reg_event_<call>(struct ftrace_event_call *unused)
437  * {
438  *      return register_trace_<call>(ftrace_event_<call>);
439  * }
440  *
441  * static void ftrace_unreg_event_<call>(struct ftrace_event_call *unused)
442  * {
443  *      unregister_trace_<call>(ftrace_event_<call>);
444  * }
445  *
446  *
447  * For those macros defined with TRACE_EVENT:
448  *
449  * static struct ftrace_event_call event_<call>;
450  *
451  * static void ftrace_raw_event_<call>(proto)
452  * {
453  *      struct ring_buffer_event *event;
454  *      struct ftrace_raw_<call> *entry; <-- defined in stage 1
455  *      struct ring_buffer *buffer;
456  *      unsigned long irq_flags;
457  *      int pc;
458  *
459  *      local_save_flags(irq_flags);
460  *      pc = preempt_count();
461  *
462  *      event = trace_current_buffer_lock_reserve(&buffer,
463  *                                event_<call>.id,
464  *                                sizeof(struct ftrace_raw_<call>),
465  *                                irq_flags, pc);
466  *      if (!event)
467  *              return;
468  *      entry   = ring_buffer_event_data(event);
469  *
470  *      <assign>;  <-- Here we assign the entries by the __field and
471  *                      __array macros.
472  *
473  *      trace_current_buffer_unlock_commit(buffer, event, irq_flags, pc);
474  * }
475  *
476  * static int ftrace_raw_reg_event_<call>(struct ftrace_event_call *unused)
477  * {
478  *      int ret;
479  *
480  *      ret = register_trace_<call>(ftrace_raw_event_<call>);
481  *      if (!ret)
482  *              pr_info("event trace: Could not activate trace point "
483  *                      "probe to <call>");
484  *      return ret;
485  * }
486  *
487  * static void ftrace_unreg_event_<call>(struct ftrace_event_call *unused)
488  * {
489  *      unregister_trace_<call>(ftrace_raw_event_<call>);
490  * }
491  *
492  * static struct trace_event ftrace_event_type_<call> = {
493  *      .trace                  = ftrace_raw_output_<call>, <-- stage 2
494  * };
495  *
496  * static struct ftrace_event_call __used
497  * __attribute__((__aligned__(4)))
498  * __attribute__((section("_ftrace_events"))) event_<call> = {
499  *      .name                   = "<call>",
500  *      .system                 = "<system>",
501  *      .raw_init               = trace_event_raw_init,
502  *      .regfunc                = ftrace_reg_event_<call>,
503  *      .unregfunc              = ftrace_unreg_event_<call>,
504  * }
505  *
506  */
507
508 #ifdef CONFIG_PERF_EVENTS
509
510 #define _TRACE_PERF_INIT(call)                                          \
511         .perf_event_enable = perf_trace_enable_##call,                  \
512         .perf_event_disable = perf_trace_disable_##call,
513
514 #else
515 #define _TRACE_PERF_INIT(call)
516 #endif /* CONFIG_PERF_EVENTS */
517
518 #undef __entry
519 #define __entry entry
520
521 #undef __field
522 #define __field(type, item)
523
524 #undef __array
525 #define __array(type, item, len)
526
527 #undef __dynamic_array
528 #define __dynamic_array(type, item, len)                                \
529         __entry->__data_loc_##item = __data_offsets.item;
530
531 #undef __string
532 #define __string(item, src) __dynamic_array(char, item, -1)             \
533
534 #undef __assign_str
535 #define __assign_str(dst, src)                                          \
536         strcpy(__get_str(dst), src);
537
538 #undef TP_fast_assign
539 #define TP_fast_assign(args...) args
540
541 #undef TP_perf_assign
542 #define TP_perf_assign(args...)
543
544 #undef DECLARE_EVENT_CLASS
545 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
546                                                                         \
547 static notrace void                                                     \
548 ftrace_raw_event_id_##call(struct ftrace_event_call *event_call,        \
549                                        proto)                           \
550 {                                                                       \
551         struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
552         struct ring_buffer_event *event;                                \
553         struct ftrace_raw_##call *entry;                                \
554         struct ring_buffer *buffer;                                     \
555         unsigned long irq_flags;                                        \
556         int __data_size;                                                \
557         int pc;                                                         \
558                                                                         \
559         local_save_flags(irq_flags);                                    \
560         pc = preempt_count();                                           \
561                                                                         \
562         __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
563                                                                         \
564         event = trace_current_buffer_lock_reserve(&buffer,              \
565                                  event_call->id,                        \
566                                  sizeof(*entry) + __data_size,          \
567                                  irq_flags, pc);                        \
568         if (!event)                                                     \
569                 return;                                                 \
570         entry   = ring_buffer_event_data(event);                        \
571                                                                         \
572                                                                         \
573         tstruct                                                         \
574                                                                         \
575         { assign; }                                                     \
576                                                                         \
577         if (!filter_current_check_discard(buffer, event_call, entry, event)) \
578                 trace_nowake_buffer_unlock_commit(buffer,               \
579                                                   event, irq_flags, pc); \
580 }
581
582 #undef DEFINE_EVENT
583 #define DEFINE_EVENT(template, call, proto, args)                       \
584                                                                         \
585 static notrace void ftrace_raw_event_##call(proto)                      \
586 {                                                                       \
587         ftrace_raw_event_id_##template(&event_##call, args);            \
588 }                                                                       \
589                                                                         \
590 static notrace int                                                      \
591 ftrace_raw_reg_event_##call(struct ftrace_event_call *unused)           \
592 {                                                                       \
593         return register_trace_##call(ftrace_raw_event_##call);          \
594 }                                                                       \
595                                                                         \
596 static notrace void                                                     \
597 ftrace_raw_unreg_event_##call(struct ftrace_event_call *unused)         \
598 {                                                                       \
599         unregister_trace_##call(ftrace_raw_event_##call);               \
600 }                                                                       \
601                                                                         \
602 static struct trace_event ftrace_event_type_##call = {                  \
603         .trace                  = ftrace_raw_output_##call,             \
604 };
605
606 #undef DEFINE_EVENT_PRINT
607 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
608         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
609
610 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
611
612 #undef __entry
613 #define __entry REC
614
615 #undef __print_flags
616 #undef __print_symbolic
617 #undef __get_dynamic_array
618 #undef __get_str
619
620 #undef TP_printk
621 #define TP_printk(fmt, args...) "\"" fmt "\", "  __stringify(args)
622
623 #undef DECLARE_EVENT_CLASS
624 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
625 static const char print_fmt_##call[] = print;
626
627 #undef DEFINE_EVENT
628 #define DEFINE_EVENT(template, call, proto, args)                       \
629                                                                         \
630 static struct ftrace_event_call __used                                  \
631 __attribute__((__aligned__(4)))                                         \
632 __attribute__((section("_ftrace_events"))) event_##call = {             \
633         .name                   = #call,                                \
634         .system                 = __stringify(TRACE_SYSTEM),            \
635         .event                  = &ftrace_event_type_##call,            \
636         .raw_init               = trace_event_raw_init,                 \
637         .regfunc                = ftrace_raw_reg_event_##call,          \
638         .unregfunc              = ftrace_raw_unreg_event_##call,        \
639         .print_fmt              = print_fmt_##template,                 \
640         .define_fields          = ftrace_define_fields_##template,      \
641         _TRACE_PERF_INIT(call)                                  \
642 }
643
644 #undef DEFINE_EVENT_PRINT
645 #define DEFINE_EVENT_PRINT(template, call, proto, args, print)          \
646                                                                         \
647 static const char print_fmt_##call[] = print;                           \
648                                                                         \
649 static struct ftrace_event_call __used                                  \
650 __attribute__((__aligned__(4)))                                         \
651 __attribute__((section("_ftrace_events"))) event_##call = {             \
652         .name                   = #call,                                \
653         .system                 = __stringify(TRACE_SYSTEM),            \
654         .event                  = &ftrace_event_type_##call,            \
655         .raw_init               = trace_event_raw_init,                 \
656         .regfunc                = ftrace_raw_reg_event_##call,          \
657         .unregfunc              = ftrace_raw_unreg_event_##call,        \
658         .print_fmt              = print_fmt_##call,                     \
659         .define_fields          = ftrace_define_fields_##template,      \
660         _TRACE_PERF_INIT(call)                                  \
661 }
662
663 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
664
665 /*
666  * Define the insertion callback to perf events
667  *
668  * The job is very similar to ftrace_raw_event_<call> except that we don't
669  * insert in the ring buffer but in a perf counter.
670  *
671  * static void ftrace_perf_<call>(proto)
672  * {
673  *      struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
674  *      struct ftrace_event_call *event_call = &event_<call>;
675  *      extern void perf_tp_event(int, u64, u64, void *, int);
676  *      struct ftrace_raw_##call *entry;
677  *      struct perf_trace_buf *trace_buf;
678  *      u64 __addr = 0, __count = 1;
679  *      unsigned long irq_flags;
680  *      struct trace_entry *ent;
681  *      int __entry_size;
682  *      int __data_size;
683  *      int __cpu
684  *      int pc;
685  *
686  *      pc = preempt_count();
687  *
688  *      __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
689  *
690  *      // Below we want to get the aligned size by taking into account
691  *      // the u32 field that will later store the buffer size
692  *      __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),
693  *                           sizeof(u64));
694  *      __entry_size -= sizeof(u32);
695  *
696  *      // Protect the non nmi buffer
697  *      // This also protects the rcu read side
698  *      local_irq_save(irq_flags);
699  *      __cpu = smp_processor_id();
700  *
701  *      if (in_nmi())
702  *              trace_buf = rcu_dereference_sched(perf_trace_buf_nmi);
703  *      else
704  *              trace_buf = rcu_dereference_sched(perf_trace_buf);
705  *
706  *      if (!trace_buf)
707  *              goto end;
708  *
709  *      trace_buf = per_cpu_ptr(trace_buf, __cpu);
710  *
711  *      // Avoid recursion from perf that could mess up the buffer
712  *      if (trace_buf->recursion++)
713  *              goto end_recursion;
714  *
715  *      raw_data = trace_buf->buf;
716  *
717  *      // Make recursion update visible before entering perf_tp_event
718  *      // so that we protect from perf recursions.
719  *
720  *      barrier();
721  *
722  *      //zero dead bytes from alignment to avoid stack leak to userspace:
723  *      *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL;
724  *      entry = (struct ftrace_raw_<call> *)raw_data;
725  *      ent = &entry->ent;
726  *      tracing_generic_entry_update(ent, irq_flags, pc);
727  *      ent->type = event_call->id;
728  *
729  *      <tstruct> <- do some jobs with dynamic arrays
730  *
731  *      <assign>  <- affect our values
732  *
733  *      perf_tp_event(event_call->id, __addr, __count, entry,
734  *                   __entry_size);  <- submit them to perf counter
735  *
736  * }
737  */
738
739 #ifdef CONFIG_PERF_EVENTS
740
741 #undef __entry
742 #define __entry entry
743
744 #undef __get_dynamic_array
745 #define __get_dynamic_array(field)      \
746                 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
747
748 #undef __get_str
749 #define __get_str(field) (char *)__get_dynamic_array(field)
750
751 #undef __perf_addr
752 #define __perf_addr(a) __addr = (a)
753
754 #undef __perf_count
755 #define __perf_count(c) __count = (c)
756
757 #undef DECLARE_EVENT_CLASS
758 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
759 static notrace void                                                     \
760 perf_trace_templ_##call(struct ftrace_event_call *event_call,           \
761                             proto)                                      \
762 {                                                                       \
763         struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
764         struct ftrace_raw_##call *entry;                                \
765         u64 __addr = 0, __count = 1;                                    \
766         unsigned long irq_flags;                                        \
767         struct pt_regs *__regs;                                         \
768         int __entry_size;                                               \
769         int __data_size;                                                \
770         int rctx;                                                       \
771                                                                         \
772         __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
773         __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
774                              sizeof(u64));                              \
775         __entry_size -= sizeof(u32);                                    \
776                                                                         \
777         if (WARN_ONCE(__entry_size > PERF_MAX_TRACE_SIZE,               \
778                       "profile buffer not large enough"))               \
779                 return;                                                 \
780         entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare(     \
781                 __entry_size, event_call->id, &rctx, &irq_flags);       \
782         if (!entry)                                                     \
783                 return;                                                 \
784         tstruct                                                         \
785                                                                         \
786         { assign; }                                                     \
787                                                                         \
788         __regs = &__get_cpu_var(perf_trace_regs);                       \
789         perf_fetch_caller_regs(__regs, 2);                              \
790                                                                         \
791         perf_trace_buf_submit(entry, __entry_size, rctx, __addr,        \
792                                __count, irq_flags, __regs);             \
793 }
794
795 #undef DEFINE_EVENT
796 #define DEFINE_EVENT(template, call, proto, args)               \
797 static notrace void perf_trace_##call(proto)                    \
798 {                                                               \
799         struct ftrace_event_call *event_call = &event_##call;   \
800                                                                 \
801         perf_trace_templ_##template(event_call, args);          \
802 }
803
804 #undef DEFINE_EVENT_PRINT
805 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
806         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
807
808 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
809 #endif /* CONFIG_PERF_EVENTS */
810
811 #undef _TRACE_PROFILE_INIT
812