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Merge 4.14.20 into android-4.14
[GitHub/MotorolaMobilityLLC/kernel-slsi.git] / kernel / trace / trace_output.c
1 /*
2 * trace_output.c
3 *
4 * Copyright (C) 2008 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
5 *
6 */
7 #include <linux/module.h>
8 #include <linux/mutex.h>
9 #include <linux/ftrace.h>
10 #include <linux/sched/clock.h>
11 #include <linux/sched/mm.h>
12
13 #include "trace_output.h"
14
15 /* must be a power of 2 */
16 #define EVENT_HASHSIZE 128
17
18 DECLARE_RWSEM(trace_event_sem);
19
20 static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly;
21
22 static int next_event_type = __TRACE_LAST_TYPE + 1;
23
24 enum print_line_t trace_print_bputs_msg_only(struct trace_iterator *iter)
25 {
26 struct trace_seq *s = &iter->seq;
27 struct trace_entry *entry = iter->ent;
28 struct bputs_entry *field;
29
30 trace_assign_type(field, entry);
31
32 trace_seq_puts(s, field->str);
33
34 return trace_handle_return(s);
35 }
36
37 enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter)
38 {
39 struct trace_seq *s = &iter->seq;
40 struct trace_entry *entry = iter->ent;
41 struct bprint_entry *field;
42
43 trace_assign_type(field, entry);
44
45 trace_seq_bprintf(s, field->fmt, field->buf);
46
47 return trace_handle_return(s);
48 }
49
50 enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter)
51 {
52 struct trace_seq *s = &iter->seq;
53 struct trace_entry *entry = iter->ent;
54 struct print_entry *field;
55
56 trace_assign_type(field, entry);
57
58 trace_seq_puts(s, field->buf);
59
60 return trace_handle_return(s);
61 }
62
63 const char *
64 trace_print_flags_seq(struct trace_seq *p, const char *delim,
65 unsigned long flags,
66 const struct trace_print_flags *flag_array)
67 {
68 unsigned long mask;
69 const char *str;
70 const char *ret = trace_seq_buffer_ptr(p);
71 int i, first = 1;
72
73 for (i = 0; flag_array[i].name && flags; i++) {
74
75 mask = flag_array[i].mask;
76 if ((flags & mask) != mask)
77 continue;
78
79 str = flag_array[i].name;
80 flags &= ~mask;
81 if (!first && delim)
82 trace_seq_puts(p, delim);
83 else
84 first = 0;
85 trace_seq_puts(p, str);
86 }
87
88 /* check for left over flags */
89 if (flags) {
90 if (!first && delim)
91 trace_seq_puts(p, delim);
92 trace_seq_printf(p, "0x%lx", flags);
93 }
94
95 trace_seq_putc(p, 0);
96
97 return ret;
98 }
99 EXPORT_SYMBOL(trace_print_flags_seq);
100
101 const char *
102 trace_print_symbols_seq(struct trace_seq *p, unsigned long val,
103 const struct trace_print_flags *symbol_array)
104 {
105 int i;
106 const char *ret = trace_seq_buffer_ptr(p);
107
108 for (i = 0; symbol_array[i].name; i++) {
109
110 if (val != symbol_array[i].mask)
111 continue;
112
113 trace_seq_puts(p, symbol_array[i].name);
114 break;
115 }
116
117 if (ret == (const char *)(trace_seq_buffer_ptr(p)))
118 trace_seq_printf(p, "0x%lx", val);
119
120 trace_seq_putc(p, 0);
121
122 return ret;
123 }
124 EXPORT_SYMBOL(trace_print_symbols_seq);
125
126 #if BITS_PER_LONG == 32
127 const char *
128 trace_print_flags_seq_u64(struct trace_seq *p, const char *delim,
129 unsigned long long flags,
130 const struct trace_print_flags_u64 *flag_array)
131 {
132 unsigned long long mask;
133 const char *str;
134 const char *ret = trace_seq_buffer_ptr(p);
135 int i, first = 1;
136
137 for (i = 0; flag_array[i].name && flags; i++) {
138
139 mask = flag_array[i].mask;
140 if ((flags & mask) != mask)
141 continue;
142
143 str = flag_array[i].name;
144 flags &= ~mask;
145 if (!first && delim)
146 trace_seq_puts(p, delim);
147 else
148 first = 0;
149 trace_seq_puts(p, str);
150 }
151
152 /* check for left over flags */
153 if (flags) {
154 if (!first && delim)
155 trace_seq_puts(p, delim);
156 trace_seq_printf(p, "0x%llx", flags);
157 }
158
159 trace_seq_putc(p, 0);
160
161 return ret;
162 }
163 EXPORT_SYMBOL(trace_print_flags_seq_u64);
164
165 const char *
166 trace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val,
167 const struct trace_print_flags_u64 *symbol_array)
168 {
169 int i;
170 const char *ret = trace_seq_buffer_ptr(p);
171
172 for (i = 0; symbol_array[i].name; i++) {
173
174 if (val != symbol_array[i].mask)
175 continue;
176
177 trace_seq_puts(p, symbol_array[i].name);
178 break;
179 }
180
181 if (ret == (const char *)(trace_seq_buffer_ptr(p)))
182 trace_seq_printf(p, "0x%llx", val);
183
184 trace_seq_putc(p, 0);
185
186 return ret;
187 }
188 EXPORT_SYMBOL(trace_print_symbols_seq_u64);
189 #endif
190
191 const char *
192 trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr,
193 unsigned int bitmask_size)
194 {
195 const char *ret = trace_seq_buffer_ptr(p);
196
197 trace_seq_bitmask(p, bitmask_ptr, bitmask_size * 8);
198 trace_seq_putc(p, 0);
199
200 return ret;
201 }
202 EXPORT_SYMBOL_GPL(trace_print_bitmask_seq);
203
204 /**
205 * trace_print_hex_seq - print buffer as hex sequence
206 * @p: trace seq struct to write to
207 * @buf: The buffer to print
208 * @buf_len: Length of @buf in bytes
209 * @concatenate: Print @buf as single hex string or with spacing
210 *
211 * Prints the passed buffer as a hex sequence either as a whole,
212 * single hex string if @concatenate is true or with spacing after
213 * each byte in case @concatenate is false.
214 */
215 const char *
216 trace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len,
217 bool concatenate)
218 {
219 int i;
220 const char *ret = trace_seq_buffer_ptr(p);
221
222 for (i = 0; i < buf_len; i++)
223 trace_seq_printf(p, "%s%2.2x", concatenate || i == 0 ? "" : " ",
224 buf[i]);
225 trace_seq_putc(p, 0);
226
227 return ret;
228 }
229 EXPORT_SYMBOL(trace_print_hex_seq);
230
231 const char *
232 trace_print_array_seq(struct trace_seq *p, const void *buf, int count,
233 size_t el_size)
234 {
235 const char *ret = trace_seq_buffer_ptr(p);
236 const char *prefix = "";
237 void *ptr = (void *)buf;
238 size_t buf_len = count * el_size;
239
240 trace_seq_putc(p, '{');
241
242 while (ptr < buf + buf_len) {
243 switch (el_size) {
244 case 1:
245 trace_seq_printf(p, "%s0x%x", prefix,
246 *(u8 *)ptr);
247 break;
248 case 2:
249 trace_seq_printf(p, "%s0x%x", prefix,
250 *(u16 *)ptr);
251 break;
252 case 4:
253 trace_seq_printf(p, "%s0x%x", prefix,
254 *(u32 *)ptr);
255 break;
256 case 8:
257 trace_seq_printf(p, "%s0x%llx", prefix,
258 *(u64 *)ptr);
259 break;
260 default:
261 trace_seq_printf(p, "BAD SIZE:%zu 0x%x", el_size,
262 *(u8 *)ptr);
263 el_size = 1;
264 }
265 prefix = ",";
266 ptr += el_size;
267 }
268
269 trace_seq_putc(p, '}');
270 trace_seq_putc(p, 0);
271
272 return ret;
273 }
274 EXPORT_SYMBOL(trace_print_array_seq);
275
276 int trace_raw_output_prep(struct trace_iterator *iter,
277 struct trace_event *trace_event)
278 {
279 struct trace_event_call *event;
280 struct trace_seq *s = &iter->seq;
281 struct trace_seq *p = &iter->tmp_seq;
282 struct trace_entry *entry;
283
284 event = container_of(trace_event, struct trace_event_call, event);
285 entry = iter->ent;
286
287 if (entry->type != event->event.type) {
288 WARN_ON_ONCE(1);
289 return TRACE_TYPE_UNHANDLED;
290 }
291
292 trace_seq_init(p);
293 trace_seq_printf(s, "%s: ", trace_event_name(event));
294
295 return trace_handle_return(s);
296 }
297 EXPORT_SYMBOL(trace_raw_output_prep);
298
299 static int trace_output_raw(struct trace_iterator *iter, char *name,
300 char *fmt, va_list ap)
301 {
302 struct trace_seq *s = &iter->seq;
303
304 trace_seq_printf(s, "%s: ", name);
305 trace_seq_vprintf(s, fmt, ap);
306
307 return trace_handle_return(s);
308 }
309
310 int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...)
311 {
312 va_list ap;
313 int ret;
314
315 va_start(ap, fmt);
316 ret = trace_output_raw(iter, name, fmt, ap);
317 va_end(ap);
318
319 return ret;
320 }
321 EXPORT_SYMBOL_GPL(trace_output_call);
322
323 #ifdef CONFIG_KRETPROBES
324 static inline const char *kretprobed(const char *name)
325 {
326 static const char tramp_name[] = "kretprobe_trampoline";
327 int size = sizeof(tramp_name);
328
329 if (strncmp(tramp_name, name, size) == 0)
330 return "[unknown/kretprobe'd]";
331 return name;
332 }
333 #else
334 static inline const char *kretprobed(const char *name)
335 {
336 return name;
337 }
338 #endif /* CONFIG_KRETPROBES */
339
340 static void
341 seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address)
342 {
343 char str[KSYM_SYMBOL_LEN];
344 #ifdef CONFIG_KALLSYMS
345 const char *name;
346
347 kallsyms_lookup(address, NULL, NULL, NULL, str);
348
349 name = kretprobed(str);
350
351 if (name && strlen(name)) {
352 trace_seq_printf(s, fmt, name);
353 return;
354 }
355 #endif
356 snprintf(str, KSYM_SYMBOL_LEN, "0x%08lx", address);
357 trace_seq_printf(s, fmt, str);
358 }
359
360 static void
361 seq_print_sym_offset(struct trace_seq *s, const char *fmt,
362 unsigned long address)
363 {
364 char str[KSYM_SYMBOL_LEN];
365 #ifdef CONFIG_KALLSYMS
366 const char *name;
367
368 sprint_symbol(str, address);
369 name = kretprobed(str);
370
371 if (name && strlen(name)) {
372 trace_seq_printf(s, fmt, name);
373 return;
374 }
375 #endif
376 snprintf(str, KSYM_SYMBOL_LEN, "0x%08lx", address);
377 trace_seq_printf(s, fmt, str);
378 }
379
380 #ifndef CONFIG_64BIT
381 # define IP_FMT "%08lx"
382 #else
383 # define IP_FMT "%016lx"
384 #endif
385
386 static int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
387 unsigned long ip, unsigned long sym_flags)
388 {
389 struct file *file = NULL;
390 unsigned long vmstart = 0;
391 int ret = 1;
392
393 if (s->full)
394 return 0;
395
396 if (mm) {
397 const struct vm_area_struct *vma;
398
399 down_read(&mm->mmap_sem);
400 vma = find_vma(mm, ip);
401 if (vma) {
402 file = vma->vm_file;
403 vmstart = vma->vm_start;
404 }
405 if (file) {
406 ret = trace_seq_path(s, &file->f_path);
407 if (ret)
408 trace_seq_printf(s, "[+0x%lx]",
409 ip - vmstart);
410 }
411 up_read(&mm->mmap_sem);
412 }
413 if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file))
414 trace_seq_printf(s, " <" IP_FMT ">", ip);
415 return !trace_seq_has_overflowed(s);
416 }
417
418 int
419 seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
420 {
421 if (!ip) {
422 trace_seq_putc(s, '0');
423 goto out;
424 }
425
426 if (sym_flags & TRACE_ITER_SYM_OFFSET)
427 seq_print_sym_offset(s, "%s", ip);
428 else
429 seq_print_sym_short(s, "%s", ip);
430
431 if (sym_flags & TRACE_ITER_SYM_ADDR)
432 trace_seq_printf(s, " <" IP_FMT ">", ip);
433
434 out:
435 return !trace_seq_has_overflowed(s);
436 }
437
438 /**
439 * trace_print_lat_fmt - print the irq, preempt and lockdep fields
440 * @s: trace seq struct to write to
441 * @entry: The trace entry field from the ring buffer
442 *
443 * Prints the generic fields of irqs off, in hard or softirq, preempt
444 * count.
445 */
446 int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
447 {
448 char hardsoft_irq;
449 char need_resched;
450 char irqs_off;
451 int hardirq;
452 int softirq;
453 int nmi;
454
455 nmi = entry->flags & TRACE_FLAG_NMI;
456 hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
457 softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
458
459 irqs_off =
460 (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
461 (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' :
462 '.';
463
464 switch (entry->flags & (TRACE_FLAG_NEED_RESCHED |
465 TRACE_FLAG_PREEMPT_RESCHED)) {
466 case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED:
467 need_resched = 'N';
468 break;
469 case TRACE_FLAG_NEED_RESCHED:
470 need_resched = 'n';
471 break;
472 case TRACE_FLAG_PREEMPT_RESCHED:
473 need_resched = 'p';
474 break;
475 default:
476 need_resched = '.';
477 break;
478 }
479
480 hardsoft_irq =
481 (nmi && hardirq) ? 'Z' :
482 nmi ? 'z' :
483 (hardirq && softirq) ? 'H' :
484 hardirq ? 'h' :
485 softirq ? 's' :
486 '.' ;
487
488 trace_seq_printf(s, "%c%c%c",
489 irqs_off, need_resched, hardsoft_irq);
490
491 if (entry->preempt_count)
492 trace_seq_printf(s, "%x", entry->preempt_count);
493 else
494 trace_seq_putc(s, '.');
495
496 return !trace_seq_has_overflowed(s);
497 }
498
499 static int
500 lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
501 {
502 char comm[TASK_COMM_LEN];
503
504 trace_find_cmdline(entry->pid, comm);
505
506 trace_seq_printf(s, "%8.8s-%-5d %3d",
507 comm, entry->pid, cpu);
508
509 return trace_print_lat_fmt(s, entry);
510 }
511
512 #undef MARK
513 #define MARK(v, s) {.val = v, .sym = s}
514 /* trace overhead mark */
515 static const struct trace_mark {
516 unsigned long long val; /* unit: nsec */
517 char sym;
518 } mark[] = {
519 MARK(1000000000ULL , '$'), /* 1 sec */
520 MARK(100000000ULL , '@'), /* 100 msec */
521 MARK(10000000ULL , '*'), /* 10 msec */
522 MARK(1000000ULL , '#'), /* 1000 usecs */
523 MARK(100000ULL , '!'), /* 100 usecs */
524 MARK(10000ULL , '+'), /* 10 usecs */
525 };
526 #undef MARK
527
528 char trace_find_mark(unsigned long long d)
529 {
530 int i;
531 int size = ARRAY_SIZE(mark);
532
533 for (i = 0; i < size; i++) {
534 if (d > mark[i].val)
535 break;
536 }
537
538 return (i == size) ? ' ' : mark[i].sym;
539 }
540
541 static int
542 lat_print_timestamp(struct trace_iterator *iter, u64 next_ts)
543 {
544 struct trace_array *tr = iter->tr;
545 unsigned long verbose = tr->trace_flags & TRACE_ITER_VERBOSE;
546 unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS;
547 unsigned long long abs_ts = iter->ts - iter->trace_buffer->time_start;
548 unsigned long long rel_ts = next_ts - iter->ts;
549 struct trace_seq *s = &iter->seq;
550
551 if (in_ns) {
552 abs_ts = ns2usecs(abs_ts);
553 rel_ts = ns2usecs(rel_ts);
554 }
555
556 if (verbose && in_ns) {
557 unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC);
558 unsigned long abs_msec = (unsigned long)abs_ts;
559 unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC);
560 unsigned long rel_msec = (unsigned long)rel_ts;
561
562 trace_seq_printf(
563 s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ",
564 ns2usecs(iter->ts),
565 abs_msec, abs_usec,
566 rel_msec, rel_usec);
567
568 } else if (verbose && !in_ns) {
569 trace_seq_printf(
570 s, "[%016llx] %lld (+%lld): ",
571 iter->ts, abs_ts, rel_ts);
572
573 } else if (!verbose && in_ns) {
574 trace_seq_printf(
575 s, " %4lldus%c: ",
576 abs_ts,
577 trace_find_mark(rel_ts * NSEC_PER_USEC));
578
579 } else { /* !verbose && !in_ns */
580 trace_seq_printf(s, " %4lld: ", abs_ts);
581 }
582
583 return !trace_seq_has_overflowed(s);
584 }
585
586 int trace_print_context(struct trace_iterator *iter)
587 {
588 struct trace_array *tr = iter->tr;
589 struct trace_seq *s = &iter->seq;
590 struct trace_entry *entry = iter->ent;
591 unsigned long long t;
592 unsigned long secs, usec_rem;
593 char comm[TASK_COMM_LEN];
594
595 trace_find_cmdline(entry->pid, comm);
596
597 trace_seq_printf(s, "%16s-%-5d [%03d] ",
598 comm, entry->pid, iter->cpu);
599
600 if (tr->trace_flags & TRACE_ITER_RECORD_TGID) {
601 unsigned int tgid = trace_find_tgid(entry->pid);
602
603 if (!tgid)
604 trace_seq_printf(s, "(-----) ");
605 else
606 trace_seq_printf(s, "(%5d) ", tgid);
607 }
608
609 if (tr->trace_flags & TRACE_ITER_IRQ_INFO)
610 trace_print_lat_fmt(s, entry);
611
612 if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) {
613 t = ns2usecs(iter->ts);
614 usec_rem = do_div(t, USEC_PER_SEC);
615 secs = (unsigned long)t;
616 trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem);
617 } else
618 trace_seq_printf(s, " %12llu: ", iter->ts);
619
620 return !trace_seq_has_overflowed(s);
621 }
622
623 int trace_print_lat_context(struct trace_iterator *iter)
624 {
625 struct trace_array *tr = iter->tr;
626 /* trace_find_next_entry will reset ent_size */
627 int ent_size = iter->ent_size;
628 struct trace_seq *s = &iter->seq;
629 u64 next_ts;
630 struct trace_entry *entry = iter->ent,
631 *next_entry = trace_find_next_entry(iter, NULL,
632 &next_ts);
633 unsigned long verbose = (tr->trace_flags & TRACE_ITER_VERBOSE);
634
635 /* Restore the original ent_size */
636 iter->ent_size = ent_size;
637
638 if (!next_entry)
639 next_ts = iter->ts;
640
641 if (verbose) {
642 char comm[TASK_COMM_LEN];
643
644 trace_find_cmdline(entry->pid, comm);
645
646 trace_seq_printf(
647 s, "%16s %5d %3d %d %08x %08lx ",
648 comm, entry->pid, iter->cpu, entry->flags,
649 entry->preempt_count, iter->idx);
650 } else {
651 lat_print_generic(s, entry, iter->cpu);
652 }
653
654 lat_print_timestamp(iter, next_ts);
655
656 return !trace_seq_has_overflowed(s);
657 }
658
659 /**
660 * ftrace_find_event - find a registered event
661 * @type: the type of event to look for
662 *
663 * Returns an event of type @type otherwise NULL
664 * Called with trace_event_read_lock() held.
665 */
666 struct trace_event *ftrace_find_event(int type)
667 {
668 struct trace_event *event;
669 unsigned key;
670
671 key = type & (EVENT_HASHSIZE - 1);
672
673 hlist_for_each_entry(event, &event_hash[key], node) {
674 if (event->type == type)
675 return event;
676 }
677
678 return NULL;
679 }
680
681 static LIST_HEAD(ftrace_event_list);
682
683 static int trace_search_list(struct list_head **list)
684 {
685 struct trace_event *e;
686 int last = __TRACE_LAST_TYPE;
687
688 if (list_empty(&ftrace_event_list)) {
689 *list = &ftrace_event_list;
690 return last + 1;
691 }
692
693 /*
694 * We used up all possible max events,
695 * lets see if somebody freed one.
696 */
697 list_for_each_entry(e, &ftrace_event_list, list) {
698 if (e->type != last + 1)
699 break;
700 last++;
701 }
702
703 /* Did we used up all 65 thousand events??? */
704 if ((last + 1) > TRACE_EVENT_TYPE_MAX)
705 return 0;
706
707 *list = &e->list;
708 return last + 1;
709 }
710
711 void trace_event_read_lock(void)
712 {
713 down_read(&trace_event_sem);
714 }
715
716 void trace_event_read_unlock(void)
717 {
718 up_read(&trace_event_sem);
719 }
720
721 /**
722 * register_trace_event - register output for an event type
723 * @event: the event type to register
724 *
725 * Event types are stored in a hash and this hash is used to
726 * find a way to print an event. If the @event->type is set
727 * then it will use that type, otherwise it will assign a
728 * type to use.
729 *
730 * If you assign your own type, please make sure it is added
731 * to the trace_type enum in trace.h, to avoid collisions
732 * with the dynamic types.
733 *
734 * Returns the event type number or zero on error.
735 */
736 int register_trace_event(struct trace_event *event)
737 {
738 unsigned key;
739 int ret = 0;
740
741 down_write(&trace_event_sem);
742
743 if (WARN_ON(!event))
744 goto out;
745
746 if (WARN_ON(!event->funcs))
747 goto out;
748
749 INIT_LIST_HEAD(&event->list);
750
751 if (!event->type) {
752 struct list_head *list = NULL;
753
754 if (next_event_type > TRACE_EVENT_TYPE_MAX) {
755
756 event->type = trace_search_list(&list);
757 if (!event->type)
758 goto out;
759
760 } else {
761
762 event->type = next_event_type++;
763 list = &ftrace_event_list;
764 }
765
766 if (WARN_ON(ftrace_find_event(event->type)))
767 goto out;
768
769 list_add_tail(&event->list, list);
770
771 } else if (event->type > __TRACE_LAST_TYPE) {
772 printk(KERN_WARNING "Need to add type to trace.h\n");
773 WARN_ON(1);
774 goto out;
775 } else {
776 /* Is this event already used */
777 if (ftrace_find_event(event->type))
778 goto out;
779 }
780
781 if (event->funcs->trace == NULL)
782 event->funcs->trace = trace_nop_print;
783 if (event->funcs->raw == NULL)
784 event->funcs->raw = trace_nop_print;
785 if (event->funcs->hex == NULL)
786 event->funcs->hex = trace_nop_print;
787 if (event->funcs->binary == NULL)
788 event->funcs->binary = trace_nop_print;
789
790 key = event->type & (EVENT_HASHSIZE - 1);
791
792 hlist_add_head(&event->node, &event_hash[key]);
793
794 ret = event->type;
795 out:
796 up_write(&trace_event_sem);
797
798 return ret;
799 }
800 EXPORT_SYMBOL_GPL(register_trace_event);
801
802 /*
803 * Used by module code with the trace_event_sem held for write.
804 */
805 int __unregister_trace_event(struct trace_event *event)
806 {
807 hlist_del(&event->node);
808 list_del(&event->list);
809 return 0;
810 }
811
812 /**
813 * unregister_trace_event - remove a no longer used event
814 * @event: the event to remove
815 */
816 int unregister_trace_event(struct trace_event *event)
817 {
818 down_write(&trace_event_sem);
819 __unregister_trace_event(event);
820 up_write(&trace_event_sem);
821
822 return 0;
823 }
824 EXPORT_SYMBOL_GPL(unregister_trace_event);
825
826 /*
827 * Standard events
828 */
829
830 enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags,
831 struct trace_event *event)
832 {
833 trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type);
834
835 return trace_handle_return(&iter->seq);
836 }
837
838 /* TRACE_FN */
839 static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags,
840 struct trace_event *event)
841 {
842 struct ftrace_entry *field;
843 struct trace_seq *s = &iter->seq;
844
845 trace_assign_type(field, iter->ent);
846
847 seq_print_ip_sym(s, field->ip, flags);
848
849 if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) {
850 trace_seq_puts(s, " <-");
851 seq_print_ip_sym(s, field->parent_ip, flags);
852 }
853
854 trace_seq_putc(s, '\n');
855
856 return trace_handle_return(s);
857 }
858
859 static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags,
860 struct trace_event *event)
861 {
862 struct ftrace_entry *field;
863
864 trace_assign_type(field, iter->ent);
865
866 trace_seq_printf(&iter->seq, "%lx %lx\n",
867 field->ip,
868 field->parent_ip);
869
870 return trace_handle_return(&iter->seq);
871 }
872
873 static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags,
874 struct trace_event *event)
875 {
876 struct ftrace_entry *field;
877 struct trace_seq *s = &iter->seq;
878
879 trace_assign_type(field, iter->ent);
880
881 SEQ_PUT_HEX_FIELD(s, field->ip);
882 SEQ_PUT_HEX_FIELD(s, field->parent_ip);
883
884 return trace_handle_return(s);
885 }
886
887 static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags,
888 struct trace_event *event)
889 {
890 struct ftrace_entry *field;
891 struct trace_seq *s = &iter->seq;
892
893 trace_assign_type(field, iter->ent);
894
895 SEQ_PUT_FIELD(s, field->ip);
896 SEQ_PUT_FIELD(s, field->parent_ip);
897
898 return trace_handle_return(s);
899 }
900
901 static struct trace_event_functions trace_fn_funcs = {
902 .trace = trace_fn_trace,
903 .raw = trace_fn_raw,
904 .hex = trace_fn_hex,
905 .binary = trace_fn_bin,
906 };
907
908 static struct trace_event trace_fn_event = {
909 .type = TRACE_FN,
910 .funcs = &trace_fn_funcs,
911 };
912
913 /* TRACE_GRAPH_ENT */
914 static enum print_line_t trace_graph_ent_trace(struct trace_iterator *iter, int flags,
915 struct trace_event *event)
916 {
917 struct trace_seq *s = &iter->seq;
918 struct ftrace_graph_ent_entry *field;
919
920 trace_assign_type(field, iter->ent);
921
922 trace_seq_puts(s, "graph_ent: func=");
923 if (trace_seq_has_overflowed(s))
924 return TRACE_TYPE_PARTIAL_LINE;
925
926 if (!seq_print_ip_sym(s, field->graph_ent.func, flags))
927 return TRACE_TYPE_PARTIAL_LINE;
928
929 trace_seq_puts(s, "\n");
930 if (trace_seq_has_overflowed(s))
931 return TRACE_TYPE_PARTIAL_LINE;
932
933 return TRACE_TYPE_HANDLED;
934 }
935
936 static enum print_line_t trace_graph_ent_raw(struct trace_iterator *iter, int flags,
937 struct trace_event *event)
938 {
939 struct ftrace_graph_ent_entry *field;
940
941 trace_assign_type(field, iter->ent);
942
943 trace_seq_printf(&iter->seq, "%lx %d\n",
944 field->graph_ent.func,
945 field->graph_ent.depth);
946 if (trace_seq_has_overflowed(&iter->seq))
947 return TRACE_TYPE_PARTIAL_LINE;
948
949 return TRACE_TYPE_HANDLED;
950 }
951
952 static enum print_line_t trace_graph_ent_hex(struct trace_iterator *iter, int flags,
953 struct trace_event *event)
954 {
955 struct ftrace_graph_ent_entry *field;
956 struct trace_seq *s = &iter->seq;
957
958 trace_assign_type(field, iter->ent);
959
960 SEQ_PUT_HEX_FIELD(s, field->graph_ent.func);
961 SEQ_PUT_HEX_FIELD(s, field->graph_ent.depth);
962
963 return TRACE_TYPE_HANDLED;
964 }
965
966 static enum print_line_t trace_graph_ent_bin(struct trace_iterator *iter, int flags,
967 struct trace_event *event)
968 {
969 struct ftrace_graph_ent_entry *field;
970 struct trace_seq *s = &iter->seq;
971
972 trace_assign_type(field, iter->ent);
973
974 SEQ_PUT_FIELD(s, field->graph_ent.func);
975 SEQ_PUT_FIELD(s, field->graph_ent.depth);
976
977 return TRACE_TYPE_HANDLED;
978 }
979
980 static struct trace_event_functions trace_graph_ent_funcs = {
981 .trace = trace_graph_ent_trace,
982 .raw = trace_graph_ent_raw,
983 .hex = trace_graph_ent_hex,
984 .binary = trace_graph_ent_bin,
985 };
986
987 static struct trace_event trace_graph_ent_event = {
988 .type = TRACE_GRAPH_ENT,
989 .funcs = &trace_graph_ent_funcs,
990 };
991
992 /* TRACE_GRAPH_RET */
993 static enum print_line_t trace_graph_ret_trace(struct trace_iterator *iter, int flags,
994 struct trace_event *event)
995 {
996 struct trace_seq *s = &iter->seq;
997 struct trace_entry *entry = iter->ent;
998 struct ftrace_graph_ret_entry *field;
999
1000 trace_assign_type(field, entry);
1001
1002 trace_seq_puts(s, "graph_ret: func=");
1003 if (trace_seq_has_overflowed(s))
1004 return TRACE_TYPE_PARTIAL_LINE;
1005
1006 if (!seq_print_ip_sym(s, field->ret.func, flags))
1007 return TRACE_TYPE_PARTIAL_LINE;
1008
1009 trace_seq_puts(s, "\n");
1010 if (trace_seq_has_overflowed(s))
1011 return TRACE_TYPE_PARTIAL_LINE;
1012
1013 return TRACE_TYPE_HANDLED;
1014 }
1015
1016 static enum print_line_t trace_graph_ret_raw(struct trace_iterator *iter, int flags,
1017 struct trace_event *event)
1018 {
1019 struct ftrace_graph_ret_entry *field;
1020
1021 trace_assign_type(field, iter->ent);
1022
1023 trace_seq_printf(&iter->seq, "%lx %lld %lld %ld %d\n",
1024 field->ret.func,
1025 field->ret.calltime,
1026 field->ret.rettime,
1027 field->ret.overrun,
1028 field->ret.depth);
1029 if (trace_seq_has_overflowed(&iter->seq))
1030 return TRACE_TYPE_PARTIAL_LINE;
1031
1032 return TRACE_TYPE_HANDLED;
1033 }
1034
1035 static enum print_line_t trace_graph_ret_hex(struct trace_iterator *iter, int flags,
1036 struct trace_event *event)
1037 {
1038 struct ftrace_graph_ret_entry *field;
1039 struct trace_seq *s = &iter->seq;
1040
1041 trace_assign_type(field, iter->ent);
1042
1043 SEQ_PUT_HEX_FIELD(s, field->ret.func);
1044 SEQ_PUT_HEX_FIELD(s, field->ret.calltime);
1045 SEQ_PUT_HEX_FIELD(s, field->ret.rettime);
1046 SEQ_PUT_HEX_FIELD(s, field->ret.overrun);
1047 SEQ_PUT_HEX_FIELD(s, field->ret.depth);
1048
1049 return TRACE_TYPE_HANDLED;
1050 }
1051
1052 static enum print_line_t trace_graph_ret_bin(struct trace_iterator *iter, int flags,
1053 struct trace_event *event)
1054 {
1055 struct ftrace_graph_ret_entry *field;
1056 struct trace_seq *s = &iter->seq;
1057
1058 trace_assign_type(field, iter->ent);
1059
1060 SEQ_PUT_FIELD(s, field->ret.func);
1061 SEQ_PUT_FIELD(s, field->ret.calltime);
1062 SEQ_PUT_FIELD(s, field->ret.rettime);
1063 SEQ_PUT_FIELD(s, field->ret.overrun);
1064 SEQ_PUT_FIELD(s, field->ret.depth);
1065
1066 return TRACE_TYPE_HANDLED;
1067 }
1068
1069 static struct trace_event_functions trace_graph_ret_funcs = {
1070 .trace = trace_graph_ret_trace,
1071 .raw = trace_graph_ret_raw,
1072 .hex = trace_graph_ret_hex,
1073 .binary = trace_graph_ret_bin,
1074 };
1075
1076 static struct trace_event trace_graph_ret_event = {
1077 .type = TRACE_GRAPH_RET,
1078 .funcs = &trace_graph_ret_funcs,
1079 };
1080
1081 /* TRACE_CTX an TRACE_WAKE */
1082 static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
1083 char *delim)
1084 {
1085 struct ctx_switch_entry *field;
1086 char comm[TASK_COMM_LEN];
1087 int S, T;
1088
1089
1090 trace_assign_type(field, iter->ent);
1091
1092 T = __task_state_to_char(field->next_state);
1093 S = __task_state_to_char(field->prev_state);
1094 trace_find_cmdline(field->next_pid, comm);
1095 trace_seq_printf(&iter->seq,
1096 " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
1097 field->prev_pid,
1098 field->prev_prio,
1099 S, delim,
1100 field->next_cpu,
1101 field->next_pid,
1102 field->next_prio,
1103 T, comm);
1104
1105 return trace_handle_return(&iter->seq);
1106 }
1107
1108 static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags,
1109 struct trace_event *event)
1110 {
1111 return trace_ctxwake_print(iter, "==>");
1112 }
1113
1114 static enum print_line_t trace_wake_print(struct trace_iterator *iter,
1115 int flags, struct trace_event *event)
1116 {
1117 return trace_ctxwake_print(iter, " +");
1118 }
1119
1120 static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
1121 {
1122 struct ctx_switch_entry *field;
1123 int T;
1124
1125 trace_assign_type(field, iter->ent);
1126
1127 if (!S)
1128 S = __task_state_to_char(field->prev_state);
1129 T = __task_state_to_char(field->next_state);
1130 trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n",
1131 field->prev_pid,
1132 field->prev_prio,
1133 S,
1134 field->next_cpu,
1135 field->next_pid,
1136 field->next_prio,
1137 T);
1138
1139 return trace_handle_return(&iter->seq);
1140 }
1141
1142 static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags,
1143 struct trace_event *event)
1144 {
1145 return trace_ctxwake_raw(iter, 0);
1146 }
1147
1148 static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags,
1149 struct trace_event *event)
1150 {
1151 return trace_ctxwake_raw(iter, '+');
1152 }
1153
1154
1155 static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
1156 {
1157 struct ctx_switch_entry *field;
1158 struct trace_seq *s = &iter->seq;
1159 int T;
1160
1161 trace_assign_type(field, iter->ent);
1162
1163 if (!S)
1164 S = __task_state_to_char(field->prev_state);
1165 T = __task_state_to_char(field->next_state);
1166
1167 SEQ_PUT_HEX_FIELD(s, field->prev_pid);
1168 SEQ_PUT_HEX_FIELD(s, field->prev_prio);
1169 SEQ_PUT_HEX_FIELD(s, S);
1170 SEQ_PUT_HEX_FIELD(s, field->next_cpu);
1171 SEQ_PUT_HEX_FIELD(s, field->next_pid);
1172 SEQ_PUT_HEX_FIELD(s, field->next_prio);
1173 SEQ_PUT_HEX_FIELD(s, T);
1174
1175 return trace_handle_return(s);
1176 }
1177
1178 static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags,
1179 struct trace_event *event)
1180 {
1181 return trace_ctxwake_hex(iter, 0);
1182 }
1183
1184 static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags,
1185 struct trace_event *event)
1186 {
1187 return trace_ctxwake_hex(iter, '+');
1188 }
1189
1190 static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
1191 int flags, struct trace_event *event)
1192 {
1193 struct ctx_switch_entry *field;
1194 struct trace_seq *s = &iter->seq;
1195
1196 trace_assign_type(field, iter->ent);
1197
1198 SEQ_PUT_FIELD(s, field->prev_pid);
1199 SEQ_PUT_FIELD(s, field->prev_prio);
1200 SEQ_PUT_FIELD(s, field->prev_state);
1201 SEQ_PUT_FIELD(s, field->next_cpu);
1202 SEQ_PUT_FIELD(s, field->next_pid);
1203 SEQ_PUT_FIELD(s, field->next_prio);
1204 SEQ_PUT_FIELD(s, field->next_state);
1205
1206 return trace_handle_return(s);
1207 }
1208
1209 static struct trace_event_functions trace_ctx_funcs = {
1210 .trace = trace_ctx_print,
1211 .raw = trace_ctx_raw,
1212 .hex = trace_ctx_hex,
1213 .binary = trace_ctxwake_bin,
1214 };
1215
1216 static struct trace_event trace_ctx_event = {
1217 .type = TRACE_CTX,
1218 .funcs = &trace_ctx_funcs,
1219 };
1220
1221 static struct trace_event_functions trace_wake_funcs = {
1222 .trace = trace_wake_print,
1223 .raw = trace_wake_raw,
1224 .hex = trace_wake_hex,
1225 .binary = trace_ctxwake_bin,
1226 };
1227
1228 static struct trace_event trace_wake_event = {
1229 .type = TRACE_WAKE,
1230 .funcs = &trace_wake_funcs,
1231 };
1232
1233 /* TRACE_STACK */
1234
1235 static enum print_line_t trace_stack_print(struct trace_iterator *iter,
1236 int flags, struct trace_event *event)
1237 {
1238 struct stack_entry *field;
1239 struct trace_seq *s = &iter->seq;
1240 unsigned long *p;
1241 unsigned long *end;
1242
1243 trace_assign_type(field, iter->ent);
1244 end = (unsigned long *)((long)iter->ent + iter->ent_size);
1245
1246 trace_seq_puts(s, "<stack trace>\n");
1247
1248 for (p = field->caller; p && *p != ULONG_MAX && p < end; p++) {
1249
1250 if (trace_seq_has_overflowed(s))
1251 break;
1252
1253 trace_seq_puts(s, " => ");
1254 seq_print_ip_sym(s, *p, flags);
1255 trace_seq_putc(s, '\n');
1256 }
1257
1258 return trace_handle_return(s);
1259 }
1260
1261 static struct trace_event_functions trace_stack_funcs = {
1262 .trace = trace_stack_print,
1263 };
1264
1265 static struct trace_event trace_stack_event = {
1266 .type = TRACE_STACK,
1267 .funcs = &trace_stack_funcs,
1268 };
1269
1270 /* TRACE_USER_STACK */
1271 static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
1272 int flags, struct trace_event *event)
1273 {
1274 struct trace_array *tr = iter->tr;
1275 struct userstack_entry *field;
1276 struct trace_seq *s = &iter->seq;
1277 struct mm_struct *mm = NULL;
1278 unsigned int i;
1279
1280 trace_assign_type(field, iter->ent);
1281
1282 trace_seq_puts(s, "<user stack trace>\n");
1283
1284 if (tr->trace_flags & TRACE_ITER_SYM_USEROBJ) {
1285 struct task_struct *task;
1286 /*
1287 * we do the lookup on the thread group leader,
1288 * since individual threads might have already quit!
1289 */
1290 rcu_read_lock();
1291 task = find_task_by_vpid(field->tgid);
1292 if (task)
1293 mm = get_task_mm(task);
1294 rcu_read_unlock();
1295 }
1296
1297 for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
1298 unsigned long ip = field->caller[i];
1299
1300 if (ip == ULONG_MAX || trace_seq_has_overflowed(s))
1301 break;
1302
1303 trace_seq_puts(s, " => ");
1304
1305 if (!ip) {
1306 trace_seq_puts(s, "??");
1307 trace_seq_putc(s, '\n');
1308 continue;
1309 }
1310
1311 seq_print_user_ip(s, mm, ip, flags);
1312 trace_seq_putc(s, '\n');
1313 }
1314
1315 if (mm)
1316 mmput(mm);
1317
1318 return trace_handle_return(s);
1319 }
1320
1321 static struct trace_event_functions trace_user_stack_funcs = {
1322 .trace = trace_user_stack_print,
1323 };
1324
1325 static struct trace_event trace_user_stack_event = {
1326 .type = TRACE_USER_STACK,
1327 .funcs = &trace_user_stack_funcs,
1328 };
1329
1330 /* TRACE_HWLAT */
1331 static enum print_line_t
1332 trace_hwlat_print(struct trace_iterator *iter, int flags,
1333 struct trace_event *event)
1334 {
1335 struct trace_entry *entry = iter->ent;
1336 struct trace_seq *s = &iter->seq;
1337 struct hwlat_entry *field;
1338
1339 trace_assign_type(field, entry);
1340
1341 trace_seq_printf(s, "#%-5u inner/outer(us): %4llu/%-5llu ts:%lld.%09ld",
1342 field->seqnum,
1343 field->duration,
1344 field->outer_duration,
1345 (long long)field->timestamp.tv_sec,
1346 field->timestamp.tv_nsec);
1347
1348 if (field->nmi_count) {
1349 /*
1350 * The generic sched_clock() is not NMI safe, thus
1351 * we only record the count and not the time.
1352 */
1353 if (!IS_ENABLED(CONFIG_GENERIC_SCHED_CLOCK))
1354 trace_seq_printf(s, " nmi-total:%llu",
1355 field->nmi_total_ts);
1356 trace_seq_printf(s, " nmi-count:%u",
1357 field->nmi_count);
1358 }
1359
1360 trace_seq_putc(s, '\n');
1361
1362 return trace_handle_return(s);
1363 }
1364
1365
1366 static enum print_line_t
1367 trace_hwlat_raw(struct trace_iterator *iter, int flags,
1368 struct trace_event *event)
1369 {
1370 struct hwlat_entry *field;
1371 struct trace_seq *s = &iter->seq;
1372
1373 trace_assign_type(field, iter->ent);
1374
1375 trace_seq_printf(s, "%llu %lld %lld %09ld %u\n",
1376 field->duration,
1377 field->outer_duration,
1378 (long long)field->timestamp.tv_sec,
1379 field->timestamp.tv_nsec,
1380 field->seqnum);
1381
1382 return trace_handle_return(s);
1383 }
1384
1385 static struct trace_event_functions trace_hwlat_funcs = {
1386 .trace = trace_hwlat_print,
1387 .raw = trace_hwlat_raw,
1388 };
1389
1390 static struct trace_event trace_hwlat_event = {
1391 .type = TRACE_HWLAT,
1392 .funcs = &trace_hwlat_funcs,
1393 };
1394
1395 /* TRACE_BPUTS */
1396 static enum print_line_t
1397 trace_bputs_print(struct trace_iterator *iter, int flags,
1398 struct trace_event *event)
1399 {
1400 struct trace_entry *entry = iter->ent;
1401 struct trace_seq *s = &iter->seq;
1402 struct bputs_entry *field;
1403
1404 trace_assign_type(field, entry);
1405
1406 seq_print_ip_sym(s, field->ip, flags);
1407 trace_seq_puts(s, ": ");
1408 trace_seq_puts(s, field->str);
1409
1410 return trace_handle_return(s);
1411 }
1412
1413
1414 static enum print_line_t
1415 trace_bputs_raw(struct trace_iterator *iter, int flags,
1416 struct trace_event *event)
1417 {
1418 struct bputs_entry *field;
1419 struct trace_seq *s = &iter->seq;
1420
1421 trace_assign_type(field, iter->ent);
1422
1423 trace_seq_printf(s, ": %lx : ", field->ip);
1424 trace_seq_puts(s, field->str);
1425
1426 return trace_handle_return(s);
1427 }
1428
1429 static struct trace_event_functions trace_bputs_funcs = {
1430 .trace = trace_bputs_print,
1431 .raw = trace_bputs_raw,
1432 };
1433
1434 static struct trace_event trace_bputs_event = {
1435 .type = TRACE_BPUTS,
1436 .funcs = &trace_bputs_funcs,
1437 };
1438
1439 /* TRACE_BPRINT */
1440 static enum print_line_t
1441 trace_bprint_print(struct trace_iterator *iter, int flags,
1442 struct trace_event *event)
1443 {
1444 struct trace_entry *entry = iter->ent;
1445 struct trace_seq *s = &iter->seq;
1446 struct bprint_entry *field;
1447
1448 trace_assign_type(field, entry);
1449
1450 seq_print_ip_sym(s, field->ip, flags);
1451 trace_seq_puts(s, ": ");
1452 trace_seq_bprintf(s, field->fmt, field->buf);
1453
1454 return trace_handle_return(s);
1455 }
1456
1457
1458 static enum print_line_t
1459 trace_bprint_raw(struct trace_iterator *iter, int flags,
1460 struct trace_event *event)
1461 {
1462 struct bprint_entry *field;
1463 struct trace_seq *s = &iter->seq;
1464
1465 trace_assign_type(field, iter->ent);
1466
1467 trace_seq_printf(s, ": %lx : ", field->ip);
1468 trace_seq_bprintf(s, field->fmt, field->buf);
1469
1470 return trace_handle_return(s);
1471 }
1472
1473 static struct trace_event_functions trace_bprint_funcs = {
1474 .trace = trace_bprint_print,
1475 .raw = trace_bprint_raw,
1476 };
1477
1478 static struct trace_event trace_bprint_event = {
1479 .type = TRACE_BPRINT,
1480 .funcs = &trace_bprint_funcs,
1481 };
1482
1483 /* TRACE_PRINT */
1484 static enum print_line_t trace_print_print(struct trace_iterator *iter,
1485 int flags, struct trace_event *event)
1486 {
1487 struct print_entry *field;
1488 struct trace_seq *s = &iter->seq;
1489
1490 trace_assign_type(field, iter->ent);
1491
1492 seq_print_ip_sym(s, field->ip, flags);
1493 trace_seq_printf(s, ": %s", field->buf);
1494
1495 return trace_handle_return(s);
1496 }
1497
1498 static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags,
1499 struct trace_event *event)
1500 {
1501 struct print_entry *field;
1502
1503 trace_assign_type(field, iter->ent);
1504
1505 trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf);
1506
1507 return trace_handle_return(&iter->seq);
1508 }
1509
1510 static struct trace_event_functions trace_print_funcs = {
1511 .trace = trace_print_print,
1512 .raw = trace_print_raw,
1513 };
1514
1515 static struct trace_event trace_print_event = {
1516 .type = TRACE_PRINT,
1517 .funcs = &trace_print_funcs,
1518 };
1519
1520 static enum print_line_t trace_raw_data(struct trace_iterator *iter, int flags,
1521 struct trace_event *event)
1522 {
1523 struct raw_data_entry *field;
1524 int i;
1525
1526 trace_assign_type(field, iter->ent);
1527
1528 trace_seq_printf(&iter->seq, "# %x buf:", field->id);
1529
1530 for (i = 0; i < iter->ent_size - offsetof(struct raw_data_entry, buf); i++)
1531 trace_seq_printf(&iter->seq, " %02x",
1532 (unsigned char)field->buf[i]);
1533
1534 trace_seq_putc(&iter->seq, '\n');
1535
1536 return trace_handle_return(&iter->seq);
1537 }
1538
1539 static struct trace_event_functions trace_raw_data_funcs = {
1540 .trace = trace_raw_data,
1541 .raw = trace_raw_data,
1542 };
1543
1544 static struct trace_event trace_raw_data_event = {
1545 .type = TRACE_RAW_DATA,
1546 .funcs = &trace_raw_data_funcs,
1547 };
1548
1549
1550 static struct trace_event *events[] __initdata = {
1551 &trace_fn_event,
1552 &trace_graph_ent_event,
1553 &trace_graph_ret_event,
1554 &trace_ctx_event,
1555 &trace_wake_event,
1556 &trace_stack_event,
1557 &trace_user_stack_event,
1558 &trace_bputs_event,
1559 &trace_bprint_event,
1560 &trace_print_event,
1561 &trace_hwlat_event,
1562 &trace_raw_data_event,
1563 NULL
1564 };
1565
1566 __init static int init_events(void)
1567 {
1568 struct trace_event *event;
1569 int i, ret;
1570
1571 for (i = 0; events[i]; i++) {
1572 event = events[i];
1573
1574 ret = register_trace_event(event);
1575 if (!ret) {
1576 printk(KERN_WARNING "event %d failed to register\n",
1577 event->type);
1578 WARN_ON_ONCE(1);
1579 }
1580 }
1581
1582 return 0;
1583 }
1584 early_initcall(init_events);
Motorola kernel-slsi