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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * trace_output.c
4 *
5 * Copyright (C) 2008 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
6 *
7 */
8#include <linux/module.h>
9#include <linux/mutex.h>
10#include <linux/ftrace.h>
11#include <linux/kprobes.h>
12#include <linux/sched/clock.h>
13#include <linux/sched/mm.h>
14#include <linux/idr.h>
15
16#include "trace_output.h"
17
18/* must be a power of 2 */
19#define EVENT_HASHSIZE 128
20
21DECLARE_RWSEM(trace_event_sem);
22
23static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly;
24
25enum print_line_t trace_print_bputs_msg_only(struct trace_iterator *iter)
26{
27 struct trace_seq *s = &iter->seq;
28 struct trace_entry *entry = iter->ent;
29 struct bputs_entry *field;
30
31 trace_assign_type(field, entry);
32
33 trace_seq_puts(s, field->str);
34
35 return trace_handle_return(s);
36}
37
38enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter)
39{
40 struct trace_seq *s = &iter->seq;
41 struct trace_entry *entry = iter->ent;
42 struct bprint_entry *field;
43
44 trace_assign_type(field, entry);
45
46 trace_seq_bprintf(s, field->fmt, field->buf);
47
48 return trace_handle_return(s);
49}
50
51enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter)
52{
53 struct trace_seq *s = &iter->seq;
54 struct trace_entry *entry = iter->ent;
55 struct print_entry *field;
56
57 trace_assign_type(field, entry);
58
59 trace_seq_puts(s, field->buf);
60
61 return trace_handle_return(s);
62}
63
64const char *
65trace_print_flags_seq(struct trace_seq *p, const char *delim,
66 unsigned long flags,
67 const struct trace_print_flags *flag_array)
68{
69 unsigned long mask;
70 const char *str;
71 const char *ret = trace_seq_buffer_ptr(p);
72 int i, first = 1;
73
74 for (i = 0; flag_array[i].name && flags; i++) {
75
76 mask = flag_array[i].mask;
77 if ((flags & mask) != mask)
78 continue;
79
80 str = flag_array[i].name;
81 flags &= ~mask;
82 if (!first && delim)
83 trace_seq_puts(p, delim);
84 else
85 first = 0;
86 trace_seq_puts(p, str);
87 }
88
89 /* check for left over flags */
90 if (flags) {
91 if (!first && delim)
92 trace_seq_puts(p, delim);
93 trace_seq_printf(p, "0x%lx", flags);
94 }
95
96 trace_seq_putc(p, 0);
97
98 return ret;
99}
100EXPORT_SYMBOL(trace_print_flags_seq);
101
102const char *
103trace_print_symbols_seq(struct trace_seq *p, unsigned long val,
104 const struct trace_print_flags *symbol_array)
105{
106 int i;
107 const char *ret = trace_seq_buffer_ptr(p);
108
109 for (i = 0; symbol_array[i].name; i++) {
110
111 if (val != symbol_array[i].mask)
112 continue;
113
114 trace_seq_puts(p, symbol_array[i].name);
115 break;
116 }
117
118 if (ret == (const char *)(trace_seq_buffer_ptr(p)))
119 trace_seq_printf(p, "0x%lx", val);
120
121 trace_seq_putc(p, 0);
122
123 return ret;
124}
125EXPORT_SYMBOL(trace_print_symbols_seq);
126
127#if BITS_PER_LONG == 32
128const char *
129trace_print_flags_seq_u64(struct trace_seq *p, const char *delim,
130 unsigned long long flags,
131 const struct trace_print_flags_u64 *flag_array)
132{
133 unsigned long long mask;
134 const char *str;
135 const char *ret = trace_seq_buffer_ptr(p);
136 int i, first = 1;
137
138 for (i = 0; flag_array[i].name && flags; i++) {
139
140 mask = flag_array[i].mask;
141 if ((flags & mask) != mask)
142 continue;
143
144 str = flag_array[i].name;
145 flags &= ~mask;
146 if (!first && delim)
147 trace_seq_puts(p, delim);
148 else
149 first = 0;
150 trace_seq_puts(p, str);
151 }
152
153 /* check for left over flags */
154 if (flags) {
155 if (!first && delim)
156 trace_seq_puts(p, delim);
157 trace_seq_printf(p, "0x%llx", flags);
158 }
159
160 trace_seq_putc(p, 0);
161
162 return ret;
163}
164EXPORT_SYMBOL(trace_print_flags_seq_u64);
165
166const char *
167trace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val,
168 const struct trace_print_flags_u64 *symbol_array)
169{
170 int i;
171 const char *ret = trace_seq_buffer_ptr(p);
172
173 for (i = 0; symbol_array[i].name; i++) {
174
175 if (val != symbol_array[i].mask)
176 continue;
177
178 trace_seq_puts(p, symbol_array[i].name);
179 break;
180 }
181
182 if (ret == (const char *)(trace_seq_buffer_ptr(p)))
183 trace_seq_printf(p, "0x%llx", val);
184
185 trace_seq_putc(p, 0);
186
187 return ret;
188}
189EXPORT_SYMBOL(trace_print_symbols_seq_u64);
190#endif
191
192const char *
193trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr,
194 unsigned int bitmask_size)
195{
196 const char *ret = trace_seq_buffer_ptr(p);
197
198 trace_seq_bitmask(p, bitmask_ptr, bitmask_size * 8);
199 trace_seq_putc(p, 0);
200
201 return ret;
202}
203EXPORT_SYMBOL_GPL(trace_print_bitmask_seq);
204
205/**
206 * trace_print_hex_seq - print buffer as hex sequence
207 * @p: trace seq struct to write to
208 * @buf: The buffer to print
209 * @buf_len: Length of @buf in bytes
210 * @concatenate: Print @buf as single hex string or with spacing
211 *
212 * Prints the passed buffer as a hex sequence either as a whole,
213 * single hex string if @concatenate is true or with spacing after
214 * each byte in case @concatenate is false.
215 */
216const char *
217trace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len,
218 bool concatenate)
219{
220 int i;
221 const char *ret = trace_seq_buffer_ptr(p);
222 const char *fmt = concatenate ? "%*phN" : "%*ph";
223
224 for (i = 0; i < buf_len; i += 16) {
225 if (!concatenate && i != 0)
226 trace_seq_putc(p, ' ');
227 trace_seq_printf(p, fmt, min(buf_len - i, 16), &buf[i]);
228 }
229 trace_seq_putc(p, 0);
230
231 return ret;
232}
233EXPORT_SYMBOL(trace_print_hex_seq);
234
235const char *
236trace_print_array_seq(struct trace_seq *p, const void *buf, int count,
237 size_t el_size)
238{
239 const char *ret = trace_seq_buffer_ptr(p);
240 const char *prefix = "";
241 void *ptr = (void *)buf;
242 size_t buf_len = count * el_size;
243
244 trace_seq_putc(p, '{');
245
246 while (ptr < buf + buf_len) {
247 switch (el_size) {
248 case 1:
249 trace_seq_printf(p, "%s0x%x", prefix,
250 *(u8 *)ptr);
251 break;
252 case 2:
253 trace_seq_printf(p, "%s0x%x", prefix,
254 *(u16 *)ptr);
255 break;
256 case 4:
257 trace_seq_printf(p, "%s0x%x", prefix,
258 *(u32 *)ptr);
259 break;
260 case 8:
261 trace_seq_printf(p, "%s0x%llx", prefix,
262 *(u64 *)ptr);
263 break;
264 default:
265 trace_seq_printf(p, "BAD SIZE:%zu 0x%x", el_size,
266 *(u8 *)ptr);
267 el_size = 1;
268 }
269 prefix = ",";
270 ptr += el_size;
271 }
272
273 trace_seq_putc(p, '}');
274 trace_seq_putc(p, 0);
275
276 return ret;
277}
278EXPORT_SYMBOL(trace_print_array_seq);
279
280const char *
281trace_print_hex_dump_seq(struct trace_seq *p, const char *prefix_str,
282 int prefix_type, int rowsize, int groupsize,
283 const void *buf, size_t len, bool ascii)
284{
285 const char *ret = trace_seq_buffer_ptr(p);
286
287 trace_seq_putc(p, '\n');
288 trace_seq_hex_dump(p, prefix_str, prefix_type,
289 rowsize, groupsize, buf, len, ascii);
290 trace_seq_putc(p, 0);
291 return ret;
292}
293EXPORT_SYMBOL(trace_print_hex_dump_seq);
294
295int trace_raw_output_prep(struct trace_iterator *iter,
296 struct trace_event *trace_event)
297{
298 struct trace_event_call *event;
299 struct trace_seq *s = &iter->seq;
300 struct trace_seq *p = &iter->tmp_seq;
301 struct trace_entry *entry;
302
303 event = container_of(trace_event, struct trace_event_call, event);
304 entry = iter->ent;
305
306 if (entry->type != event->event.type) {
307 WARN_ON_ONCE(1);
308 return TRACE_TYPE_UNHANDLED;
309 }
310
311 trace_seq_init(p);
312 trace_seq_printf(s, "%s: ", trace_event_name(event));
313
314 return trace_handle_return(s);
315}
316EXPORT_SYMBOL(trace_raw_output_prep);
317
318void trace_event_printf(struct trace_iterator *iter, const char *fmt, ...)
319{
320 struct trace_seq *s = &iter->seq;
321 va_list ap;
322
323 if (ignore_event(iter))
324 return;
325
326 va_start(ap, fmt);
327 trace_seq_vprintf(s, trace_event_format(iter, fmt), ap);
328 va_end(ap);
329}
330EXPORT_SYMBOL(trace_event_printf);
331
332static __printf(3, 0)
333int trace_output_raw(struct trace_iterator *iter, char *name,
334 char *fmt, va_list ap)
335{
336 struct trace_seq *s = &iter->seq;
337
338 trace_seq_printf(s, "%s: ", name);
339 trace_seq_vprintf(s, trace_event_format(iter, fmt), ap);
340
341 return trace_handle_return(s);
342}
343
344int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...)
345{
346 va_list ap;
347 int ret;
348
349 va_start(ap, fmt);
350 ret = trace_output_raw(iter, name, fmt, ap);
351 va_end(ap);
352
353 return ret;
354}
355EXPORT_SYMBOL_GPL(trace_output_call);
356
357static inline const char *kretprobed(const char *name, unsigned long addr)
358{
359 if (is_kretprobe_trampoline(addr))
360 return "[unknown/kretprobe'd]";
361 return name;
362}
363
364void
365trace_seq_print_sym(struct trace_seq *s, unsigned long address, bool offset)
366{
367#ifdef CONFIG_KALLSYMS
368 char str[KSYM_SYMBOL_LEN];
369 const char *name;
370
371 if (offset)
372 sprint_symbol(str, address);
373 else
374 kallsyms_lookup(address, NULL, NULL, NULL, str);
375 name = kretprobed(str, address);
376
377 if (name && strlen(name)) {
378 trace_seq_puts(s, name);
379 return;
380 }
381#endif
382 trace_seq_printf(s, "0x%08lx", address);
383}
384
385#ifndef CONFIG_64BIT
386# define IP_FMT "%08lx"
387#else
388# define IP_FMT "%016lx"
389#endif
390
391static int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
392 unsigned long ip, unsigned long sym_flags)
393{
394 struct file *file = NULL;
395 unsigned long vmstart = 0;
396 int ret = 1;
397
398 if (s->full)
399 return 0;
400
401 if (mm) {
402 const struct vm_area_struct *vma;
403
404 mmap_read_lock(mm);
405 vma = find_vma(mm, ip);
406 if (vma) {
407 file = vma->vm_file;
408 vmstart = vma->vm_start;
409 }
410 if (file) {
411 ret = trace_seq_path(s, file_user_path(file));
412 if (ret)
413 trace_seq_printf(s, "[+0x%lx]",
414 ip - vmstart);
415 }
416 mmap_read_unlock(mm);
417 }
418 if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file))
419 trace_seq_printf(s, " <" IP_FMT ">", ip);
420 return !trace_seq_has_overflowed(s);
421}
422
423int
424seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
425{
426 if (!ip) {
427 trace_seq_putc(s, '0');
428 goto out;
429 }
430
431 trace_seq_print_sym(s, ip, sym_flags & TRACE_ITER_SYM_OFFSET);
432
433 if (sym_flags & TRACE_ITER_SYM_ADDR)
434 trace_seq_printf(s, " <" IP_FMT ">", ip);
435
436 out:
437 return !trace_seq_has_overflowed(s);
438}
439
440/**
441 * trace_print_lat_fmt - print the irq, preempt and lockdep fields
442 * @s: trace seq struct to write to
443 * @entry: The trace entry field from the ring buffer
444 *
445 * Prints the generic fields of irqs off, in hard or softirq, preempt
446 * count.
447 */
448int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
449{
450 char hardsoft_irq;
451 char need_resched;
452 char irqs_off;
453 int hardirq;
454 int softirq;
455 int bh_off;
456 int nmi;
457
458 nmi = entry->flags & TRACE_FLAG_NMI;
459 hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
460 softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
461 bh_off = entry->flags & TRACE_FLAG_BH_OFF;
462
463 irqs_off =
464 (entry->flags & TRACE_FLAG_IRQS_OFF && bh_off) ? 'D' :
465 (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
466 bh_off ? 'b' :
467 '.';
468
469 switch (entry->flags & (TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_NEED_RESCHED_LAZY |
470 TRACE_FLAG_PREEMPT_RESCHED)) {
471 case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_NEED_RESCHED_LAZY | TRACE_FLAG_PREEMPT_RESCHED:
472 need_resched = 'B';
473 break;
474 case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED:
475 need_resched = 'N';
476 break;
477 case TRACE_FLAG_NEED_RESCHED_LAZY | TRACE_FLAG_PREEMPT_RESCHED:
478 need_resched = 'L';
479 break;
480 case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_NEED_RESCHED_LAZY:
481 need_resched = 'b';
482 break;
483 case TRACE_FLAG_NEED_RESCHED:
484 need_resched = 'n';
485 break;
486 case TRACE_FLAG_PREEMPT_RESCHED:
487 need_resched = 'p';
488 break;
489 case TRACE_FLAG_NEED_RESCHED_LAZY:
490 need_resched = 'l';
491 break;
492 default:
493 need_resched = '.';
494 break;
495 }
496
497 hardsoft_irq =
498 (nmi && hardirq) ? 'Z' :
499 nmi ? 'z' :
500 (hardirq && softirq) ? 'H' :
501 hardirq ? 'h' :
502 softirq ? 's' :
503 '.' ;
504
505 trace_seq_printf(s, "%c%c%c",
506 irqs_off, need_resched, hardsoft_irq);
507
508 if (entry->preempt_count & 0xf)
509 trace_seq_printf(s, "%x", entry->preempt_count & 0xf);
510 else
511 trace_seq_putc(s, '.');
512
513 if (entry->preempt_count & 0xf0)
514 trace_seq_printf(s, "%x", entry->preempt_count >> 4);
515 else
516 trace_seq_putc(s, '.');
517
518 return !trace_seq_has_overflowed(s);
519}
520
521static int
522lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
523{
524 char comm[TASK_COMM_LEN];
525
526 trace_find_cmdline(entry->pid, comm);
527
528 trace_seq_printf(s, "%8.8s-%-7d %3d",
529 comm, entry->pid, cpu);
530
531 return trace_print_lat_fmt(s, entry);
532}
533
534#undef MARK
535#define MARK(v, s) {.val = v, .sym = s}
536/* trace overhead mark */
537static const struct trace_mark {
538 unsigned long long val; /* unit: nsec */
539 char sym;
540} mark[] = {
541 MARK(1000000000ULL , '$'), /* 1 sec */
542 MARK(100000000ULL , '@'), /* 100 msec */
543 MARK(10000000ULL , '*'), /* 10 msec */
544 MARK(1000000ULL , '#'), /* 1000 usecs */
545 MARK(100000ULL , '!'), /* 100 usecs */
546 MARK(10000ULL , '+'), /* 10 usecs */
547};
548#undef MARK
549
550char trace_find_mark(unsigned long long d)
551{
552 int i;
553 int size = ARRAY_SIZE(mark);
554
555 for (i = 0; i < size; i++) {
556 if (d > mark[i].val)
557 break;
558 }
559
560 return (i == size) ? ' ' : mark[i].sym;
561}
562
563static int
564lat_print_timestamp(struct trace_iterator *iter, u64 next_ts)
565{
566 struct trace_array *tr = iter->tr;
567 unsigned long verbose = tr->trace_flags & TRACE_ITER_VERBOSE;
568 unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS;
569 unsigned long long abs_ts = iter->ts - iter->array_buffer->time_start;
570 unsigned long long rel_ts = next_ts - iter->ts;
571 struct trace_seq *s = &iter->seq;
572
573 if (in_ns) {
574 abs_ts = ns2usecs(abs_ts);
575 rel_ts = ns2usecs(rel_ts);
576 }
577
578 if (verbose && in_ns) {
579 unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC);
580 unsigned long abs_msec = (unsigned long)abs_ts;
581 unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC);
582 unsigned long rel_msec = (unsigned long)rel_ts;
583
584 trace_seq_printf(
585 s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ",
586 ns2usecs(iter->ts),
587 abs_msec, abs_usec,
588 rel_msec, rel_usec);
589
590 } else if (verbose && !in_ns) {
591 trace_seq_printf(
592 s, "[%016llx] %lld (+%lld): ",
593 iter->ts, abs_ts, rel_ts);
594
595 } else if (!verbose && in_ns) {
596 trace_seq_printf(
597 s, " %4lldus%c: ",
598 abs_ts,
599 trace_find_mark(rel_ts * NSEC_PER_USEC));
600
601 } else { /* !verbose && !in_ns */
602 trace_seq_printf(s, " %4lld: ", abs_ts);
603 }
604
605 return !trace_seq_has_overflowed(s);
606}
607
608static void trace_print_time(struct trace_seq *s, struct trace_iterator *iter,
609 unsigned long long ts)
610{
611 unsigned long secs, usec_rem;
612 unsigned long long t;
613
614 if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) {
615 t = ns2usecs(ts);
616 usec_rem = do_div(t, USEC_PER_SEC);
617 secs = (unsigned long)t;
618 trace_seq_printf(s, " %5lu.%06lu", secs, usec_rem);
619 } else
620 trace_seq_printf(s, " %12llu", ts);
621}
622
623int trace_print_context(struct trace_iterator *iter)
624{
625 struct trace_array *tr = iter->tr;
626 struct trace_seq *s = &iter->seq;
627 struct trace_entry *entry = iter->ent;
628 char comm[TASK_COMM_LEN];
629
630 trace_find_cmdline(entry->pid, comm);
631
632 trace_seq_printf(s, "%16s-%-7d ", comm, entry->pid);
633
634 if (tr->trace_flags & TRACE_ITER_RECORD_TGID) {
635 unsigned int tgid = trace_find_tgid(entry->pid);
636
637 if (!tgid)
638 trace_seq_printf(s, "(-------) ");
639 else
640 trace_seq_printf(s, "(%7d) ", tgid);
641 }
642
643 trace_seq_printf(s, "[%03d] ", iter->cpu);
644
645 if (tr->trace_flags & TRACE_ITER_IRQ_INFO)
646 trace_print_lat_fmt(s, entry);
647
648 trace_print_time(s, iter, iter->ts);
649 trace_seq_puts(s, ": ");
650
651 return !trace_seq_has_overflowed(s);
652}
653
654int trace_print_lat_context(struct trace_iterator *iter)
655{
656 struct trace_entry *entry, *next_entry;
657 struct trace_array *tr = iter->tr;
658 struct trace_seq *s = &iter->seq;
659 unsigned long verbose = (tr->trace_flags & TRACE_ITER_VERBOSE);
660 u64 next_ts;
661
662 next_entry = trace_find_next_entry(iter, NULL, &next_ts);
663 if (!next_entry)
664 next_ts = iter->ts;
665
666 /* trace_find_next_entry() may change iter->ent */
667 entry = iter->ent;
668
669 if (verbose) {
670 char comm[TASK_COMM_LEN];
671
672 trace_find_cmdline(entry->pid, comm);
673
674 trace_seq_printf(
675 s, "%16s %7d %3d %d %08x %08lx ",
676 comm, entry->pid, iter->cpu, entry->flags,
677 entry->preempt_count & 0xf, iter->idx);
678 } else {
679 lat_print_generic(s, entry, iter->cpu);
680 }
681
682 lat_print_timestamp(iter, next_ts);
683
684 return !trace_seq_has_overflowed(s);
685}
686
687/**
688 * ftrace_find_event - find a registered event
689 * @type: the type of event to look for
690 *
691 * Returns an event of type @type otherwise NULL
692 * Called with trace_event_read_lock() held.
693 */
694struct trace_event *ftrace_find_event(int type)
695{
696 struct trace_event *event;
697 unsigned key;
698
699 key = type & (EVENT_HASHSIZE - 1);
700
701 hlist_for_each_entry(event, &event_hash[key], node) {
702 if (event->type == type)
703 return event;
704 }
705
706 return NULL;
707}
708
709static DEFINE_IDA(trace_event_ida);
710
711static void free_trace_event_type(int type)
712{
713 if (type >= __TRACE_LAST_TYPE)
714 ida_free(&trace_event_ida, type);
715}
716
717static int alloc_trace_event_type(void)
718{
719 int next;
720
721 /* Skip static defined type numbers */
722 next = ida_alloc_range(&trace_event_ida, __TRACE_LAST_TYPE,
723 TRACE_EVENT_TYPE_MAX, GFP_KERNEL);
724 if (next < 0)
725 return 0;
726 return next;
727}
728
729void trace_event_read_lock(void)
730{
731 down_read(&trace_event_sem);
732}
733
734void trace_event_read_unlock(void)
735{
736 up_read(&trace_event_sem);
737}
738
739/**
740 * register_trace_event - register output for an event type
741 * @event: the event type to register
742 *
743 * Event types are stored in a hash and this hash is used to
744 * find a way to print an event. If the @event->type is set
745 * then it will use that type, otherwise it will assign a
746 * type to use.
747 *
748 * If you assign your own type, please make sure it is added
749 * to the trace_type enum in trace.h, to avoid collisions
750 * with the dynamic types.
751 *
752 * Returns the event type number or zero on error.
753 */
754int register_trace_event(struct trace_event *event)
755{
756 unsigned key;
757 int ret = 0;
758
759 down_write(&trace_event_sem);
760
761 if (WARN_ON(!event))
762 goto out;
763
764 if (WARN_ON(!event->funcs))
765 goto out;
766
767 if (!event->type) {
768 event->type = alloc_trace_event_type();
769 if (!event->type)
770 goto out;
771 } else if (WARN(event->type > __TRACE_LAST_TYPE,
772 "Need to add type to trace.h")) {
773 goto out;
774 } else {
775 /* Is this event already used */
776 if (ftrace_find_event(event->type))
777 goto out;
778 }
779
780 if (event->funcs->trace == NULL)
781 event->funcs->trace = trace_nop_print;
782 if (event->funcs->raw == NULL)
783 event->funcs->raw = trace_nop_print;
784 if (event->funcs->hex == NULL)
785 event->funcs->hex = trace_nop_print;
786 if (event->funcs->binary == NULL)
787 event->funcs->binary = trace_nop_print;
788
789 key = event->type & (EVENT_HASHSIZE - 1);
790
791 hlist_add_head(&event->node, &event_hash[key]);
792
793 ret = event->type;
794 out:
795 up_write(&trace_event_sem);
796
797 return ret;
798}
799EXPORT_SYMBOL_GPL(register_trace_event);
800
801/*
802 * Used by module code with the trace_event_sem held for write.
803 */
804int __unregister_trace_event(struct trace_event *event)
805{
806 hlist_del(&event->node);
807 free_trace_event_type(event->type);
808 return 0;
809}
810
811/**
812 * unregister_trace_event - remove a no longer used event
813 * @event: the event to remove
814 */
815int unregister_trace_event(struct trace_event *event)
816{
817 down_write(&trace_event_sem);
818 __unregister_trace_event(event);
819 up_write(&trace_event_sem);
820
821 return 0;
822}
823EXPORT_SYMBOL_GPL(unregister_trace_event);
824
825/*
826 * Standard events
827 */
828
829static void print_array(struct trace_iterator *iter, void *pos,
830 struct ftrace_event_field *field)
831{
832 int offset;
833 int len;
834 int i;
835
836 offset = *(int *)pos & 0xffff;
837 len = *(int *)pos >> 16;
838
839 if (field)
840 offset += field->offset + sizeof(int);
841
842 if (offset + len > iter->ent_size) {
843 trace_seq_puts(&iter->seq, "<OVERFLOW>");
844 return;
845 }
846
847 pos = (void *)iter->ent + offset;
848
849 for (i = 0; i < len; i++, pos++) {
850 if (i)
851 trace_seq_putc(&iter->seq, ',');
852 trace_seq_printf(&iter->seq, "%02x", *(unsigned char *)pos);
853 }
854}
855
856static void print_fields(struct trace_iterator *iter, struct trace_event_call *call,
857 struct list_head *head)
858{
859 struct ftrace_event_field *field;
860 int offset;
861 int len;
862 int ret;
863 void *pos;
864
865 list_for_each_entry_reverse(field, head, link) {
866 trace_seq_printf(&iter->seq, " %s=", field->name);
867 if (field->offset + field->size > iter->ent_size) {
868 trace_seq_puts(&iter->seq, "<OVERFLOW>");
869 continue;
870 }
871 pos = (void *)iter->ent + field->offset;
872
873 switch (field->filter_type) {
874 case FILTER_COMM:
875 case FILTER_STATIC_STRING:
876 trace_seq_printf(&iter->seq, "%.*s", field->size, (char *)pos);
877 break;
878 case FILTER_RDYN_STRING:
879 case FILTER_DYN_STRING:
880 offset = *(int *)pos & 0xffff;
881 len = *(int *)pos >> 16;
882
883 if (field->filter_type == FILTER_RDYN_STRING)
884 offset += field->offset + sizeof(int);
885
886 if (offset + len > iter->ent_size) {
887 trace_seq_puts(&iter->seq, "<OVERFLOW>");
888 break;
889 }
890 pos = (void *)iter->ent + offset;
891 trace_seq_printf(&iter->seq, "%.*s", len, (char *)pos);
892 break;
893 case FILTER_PTR_STRING:
894 if (!iter->fmt_size)
895 trace_iter_expand_format(iter);
896 pos = *(void **)pos;
897 ret = strncpy_from_kernel_nofault(iter->fmt, pos,
898 iter->fmt_size);
899 if (ret < 0)
900 trace_seq_printf(&iter->seq, "(0x%px)", pos);
901 else
902 trace_seq_printf(&iter->seq, "(0x%px:%s)",
903 pos, iter->fmt);
904 break;
905 case FILTER_TRACE_FN:
906 pos = *(void **)pos;
907 trace_seq_printf(&iter->seq, "%pS", pos);
908 break;
909 case FILTER_CPU:
910 case FILTER_OTHER:
911 switch (field->size) {
912 case 1:
913 if (isprint(*(char *)pos)) {
914 trace_seq_printf(&iter->seq, "'%c'",
915 *(unsigned char *)pos);
916 }
917 trace_seq_printf(&iter->seq, "(%d)",
918 *(unsigned char *)pos);
919 break;
920 case 2:
921 trace_seq_printf(&iter->seq, "0x%x (%d)",
922 *(unsigned short *)pos,
923 *(unsigned short *)pos);
924 break;
925 case 4:
926 /* dynamic array info is 4 bytes */
927 if (strstr(field->type, "__data_loc")) {
928 print_array(iter, pos, NULL);
929 break;
930 }
931
932 if (strstr(field->type, "__rel_loc")) {
933 print_array(iter, pos, field);
934 break;
935 }
936
937 trace_seq_printf(&iter->seq, "0x%x (%d)",
938 *(unsigned int *)pos,
939 *(unsigned int *)pos);
940 break;
941 case 8:
942 trace_seq_printf(&iter->seq, "0x%llx (%lld)",
943 *(unsigned long long *)pos,
944 *(unsigned long long *)pos);
945 break;
946 default:
947 trace_seq_puts(&iter->seq, "<INVALID-SIZE>");
948 break;
949 }
950 break;
951 default:
952 trace_seq_puts(&iter->seq, "<INVALID-TYPE>");
953 }
954 }
955 trace_seq_putc(&iter->seq, '\n');
956}
957
958enum print_line_t print_event_fields(struct trace_iterator *iter,
959 struct trace_event *event)
960{
961 struct trace_event_call *call;
962 struct list_head *head;
963
964 /* ftrace defined events have separate call structures */
965 if (event->type <= __TRACE_LAST_TYPE) {
966 bool found = false;
967
968 down_read(&trace_event_sem);
969 list_for_each_entry(call, &ftrace_events, list) {
970 if (call->event.type == event->type) {
971 found = true;
972 break;
973 }
974 /* No need to search all events */
975 if (call->event.type > __TRACE_LAST_TYPE)
976 break;
977 }
978 up_read(&trace_event_sem);
979 if (!found) {
980 trace_seq_printf(&iter->seq, "UNKNOWN TYPE %d\n", event->type);
981 goto out;
982 }
983 } else {
984 call = container_of(event, struct trace_event_call, event);
985 }
986 head = trace_get_fields(call);
987
988 trace_seq_printf(&iter->seq, "%s:", trace_event_name(call));
989
990 if (head && !list_empty(head))
991 print_fields(iter, call, head);
992 else
993 trace_seq_puts(&iter->seq, "No fields found\n");
994
995 out:
996 return trace_handle_return(&iter->seq);
997}
998
999enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags,
1000 struct trace_event *event)
1001{
1002 trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type);
1003
1004 return trace_handle_return(&iter->seq);
1005}
1006
1007static void print_fn_trace(struct trace_seq *s, unsigned long ip,
1008 unsigned long parent_ip, long delta, int flags)
1009{
1010 ip += delta;
1011 parent_ip += delta;
1012
1013 seq_print_ip_sym(s, ip, flags);
1014
1015 if ((flags & TRACE_ITER_PRINT_PARENT) && parent_ip) {
1016 trace_seq_puts(s, " <-");
1017 seq_print_ip_sym(s, parent_ip, flags);
1018 }
1019}
1020
1021/* TRACE_FN */
1022static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags,
1023 struct trace_event *event)
1024{
1025 struct ftrace_entry *field;
1026 struct trace_seq *s = &iter->seq;
1027
1028 trace_assign_type(field, iter->ent);
1029
1030 print_fn_trace(s, field->ip, field->parent_ip, iter->tr->text_delta, flags);
1031 trace_seq_putc(s, '\n');
1032
1033 return trace_handle_return(s);
1034}
1035
1036static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags,
1037 struct trace_event *event)
1038{
1039 struct ftrace_entry *field;
1040
1041 trace_assign_type(field, iter->ent);
1042
1043 trace_seq_printf(&iter->seq, "%lx %lx\n",
1044 field->ip,
1045 field->parent_ip);
1046
1047 return trace_handle_return(&iter->seq);
1048}
1049
1050static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags,
1051 struct trace_event *event)
1052{
1053 struct ftrace_entry *field;
1054 struct trace_seq *s = &iter->seq;
1055
1056 trace_assign_type(field, iter->ent);
1057
1058 SEQ_PUT_HEX_FIELD(s, field->ip);
1059 SEQ_PUT_HEX_FIELD(s, field->parent_ip);
1060
1061 return trace_handle_return(s);
1062}
1063
1064static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags,
1065 struct trace_event *event)
1066{
1067 struct ftrace_entry *field;
1068 struct trace_seq *s = &iter->seq;
1069
1070 trace_assign_type(field, iter->ent);
1071
1072 SEQ_PUT_FIELD(s, field->ip);
1073 SEQ_PUT_FIELD(s, field->parent_ip);
1074
1075 return trace_handle_return(s);
1076}
1077
1078static struct trace_event_functions trace_fn_funcs = {
1079 .trace = trace_fn_trace,
1080 .raw = trace_fn_raw,
1081 .hex = trace_fn_hex,
1082 .binary = trace_fn_bin,
1083};
1084
1085static struct trace_event trace_fn_event = {
1086 .type = TRACE_FN,
1087 .funcs = &trace_fn_funcs,
1088};
1089
1090/* TRACE_CTX an TRACE_WAKE */
1091static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
1092 char *delim)
1093{
1094 struct ctx_switch_entry *field;
1095 char comm[TASK_COMM_LEN];
1096 int S, T;
1097
1098
1099 trace_assign_type(field, iter->ent);
1100
1101 T = task_index_to_char(field->next_state);
1102 S = task_index_to_char(field->prev_state);
1103 trace_find_cmdline(field->next_pid, comm);
1104 trace_seq_printf(&iter->seq,
1105 " %7d:%3d:%c %s [%03d] %7d:%3d:%c %s\n",
1106 field->prev_pid,
1107 field->prev_prio,
1108 S, delim,
1109 field->next_cpu,
1110 field->next_pid,
1111 field->next_prio,
1112 T, comm);
1113
1114 return trace_handle_return(&iter->seq);
1115}
1116
1117static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags,
1118 struct trace_event *event)
1119{
1120 return trace_ctxwake_print(iter, "==>");
1121}
1122
1123static enum print_line_t trace_wake_print(struct trace_iterator *iter,
1124 int flags, struct trace_event *event)
1125{
1126 return trace_ctxwake_print(iter, " +");
1127}
1128
1129static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
1130{
1131 struct ctx_switch_entry *field;
1132 int T;
1133
1134 trace_assign_type(field, iter->ent);
1135
1136 if (!S)
1137 S = task_index_to_char(field->prev_state);
1138 T = task_index_to_char(field->next_state);
1139 trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n",
1140 field->prev_pid,
1141 field->prev_prio,
1142 S,
1143 field->next_cpu,
1144 field->next_pid,
1145 field->next_prio,
1146 T);
1147
1148 return trace_handle_return(&iter->seq);
1149}
1150
1151static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags,
1152 struct trace_event *event)
1153{
1154 return trace_ctxwake_raw(iter, 0);
1155}
1156
1157static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags,
1158 struct trace_event *event)
1159{
1160 return trace_ctxwake_raw(iter, '+');
1161}
1162
1163
1164static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
1165{
1166 struct ctx_switch_entry *field;
1167 struct trace_seq *s = &iter->seq;
1168 int T;
1169
1170 trace_assign_type(field, iter->ent);
1171
1172 if (!S)
1173 S = task_index_to_char(field->prev_state);
1174 T = task_index_to_char(field->next_state);
1175
1176 SEQ_PUT_HEX_FIELD(s, field->prev_pid);
1177 SEQ_PUT_HEX_FIELD(s, field->prev_prio);
1178 SEQ_PUT_HEX_FIELD(s, S);
1179 SEQ_PUT_HEX_FIELD(s, field->next_cpu);
1180 SEQ_PUT_HEX_FIELD(s, field->next_pid);
1181 SEQ_PUT_HEX_FIELD(s, field->next_prio);
1182 SEQ_PUT_HEX_FIELD(s, T);
1183
1184 return trace_handle_return(s);
1185}
1186
1187static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags,
1188 struct trace_event *event)
1189{
1190 return trace_ctxwake_hex(iter, 0);
1191}
1192
1193static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags,
1194 struct trace_event *event)
1195{
1196 return trace_ctxwake_hex(iter, '+');
1197}
1198
1199static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
1200 int flags, struct trace_event *event)
1201{
1202 struct ctx_switch_entry *field;
1203 struct trace_seq *s = &iter->seq;
1204
1205 trace_assign_type(field, iter->ent);
1206
1207 SEQ_PUT_FIELD(s, field->prev_pid);
1208 SEQ_PUT_FIELD(s, field->prev_prio);
1209 SEQ_PUT_FIELD(s, field->prev_state);
1210 SEQ_PUT_FIELD(s, field->next_cpu);
1211 SEQ_PUT_FIELD(s, field->next_pid);
1212 SEQ_PUT_FIELD(s, field->next_prio);
1213 SEQ_PUT_FIELD(s, field->next_state);
1214
1215 return trace_handle_return(s);
1216}
1217
1218static struct trace_event_functions trace_ctx_funcs = {
1219 .trace = trace_ctx_print,
1220 .raw = trace_ctx_raw,
1221 .hex = trace_ctx_hex,
1222 .binary = trace_ctxwake_bin,
1223};
1224
1225static struct trace_event trace_ctx_event = {
1226 .type = TRACE_CTX,
1227 .funcs = &trace_ctx_funcs,
1228};
1229
1230static struct trace_event_functions trace_wake_funcs = {
1231 .trace = trace_wake_print,
1232 .raw = trace_wake_raw,
1233 .hex = trace_wake_hex,
1234 .binary = trace_ctxwake_bin,
1235};
1236
1237static struct trace_event trace_wake_event = {
1238 .type = TRACE_WAKE,
1239 .funcs = &trace_wake_funcs,
1240};
1241
1242/* TRACE_STACK */
1243
1244static enum print_line_t trace_stack_print(struct trace_iterator *iter,
1245 int flags, struct trace_event *event)
1246{
1247 struct stack_entry *field;
1248 struct trace_seq *s = &iter->seq;
1249 unsigned long *p;
1250 unsigned long *end;
1251 long delta = iter->tr->text_delta;
1252
1253 trace_assign_type(field, iter->ent);
1254 end = (unsigned long *)((long)iter->ent + iter->ent_size);
1255
1256 trace_seq_puts(s, "<stack trace>\n");
1257
1258 for (p = field->caller; p && p < end && *p != ULONG_MAX; p++) {
1259
1260 if (trace_seq_has_overflowed(s))
1261 break;
1262
1263 trace_seq_puts(s, " => ");
1264 if ((*p) == FTRACE_TRAMPOLINE_MARKER) {
1265 trace_seq_puts(s, "[FTRACE TRAMPOLINE]\n");
1266 continue;
1267 }
1268 seq_print_ip_sym(s, (*p) + delta, flags);
1269 trace_seq_putc(s, '\n');
1270 }
1271
1272 return trace_handle_return(s);
1273}
1274
1275static struct trace_event_functions trace_stack_funcs = {
1276 .trace = trace_stack_print,
1277};
1278
1279static struct trace_event trace_stack_event = {
1280 .type = TRACE_STACK,
1281 .funcs = &trace_stack_funcs,
1282};
1283
1284/* TRACE_USER_STACK */
1285static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
1286 int flags, struct trace_event *event)
1287{
1288 struct trace_array *tr = iter->tr;
1289 struct userstack_entry *field;
1290 struct trace_seq *s = &iter->seq;
1291 struct mm_struct *mm = NULL;
1292 unsigned int i;
1293
1294 trace_assign_type(field, iter->ent);
1295
1296 trace_seq_puts(s, "<user stack trace>\n");
1297
1298 if (tr->trace_flags & TRACE_ITER_SYM_USEROBJ) {
1299 struct task_struct *task;
1300 /*
1301 * we do the lookup on the thread group leader,
1302 * since individual threads might have already quit!
1303 */
1304 rcu_read_lock();
1305 task = find_task_by_vpid(field->tgid);
1306 if (task)
1307 mm = get_task_mm(task);
1308 rcu_read_unlock();
1309 }
1310
1311 for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
1312 unsigned long ip = field->caller[i];
1313
1314 if (!ip || trace_seq_has_overflowed(s))
1315 break;
1316
1317 trace_seq_puts(s, " => ");
1318 seq_print_user_ip(s, mm, ip, flags);
1319 trace_seq_putc(s, '\n');
1320 }
1321
1322 if (mm)
1323 mmput(mm);
1324
1325 return trace_handle_return(s);
1326}
1327
1328static struct trace_event_functions trace_user_stack_funcs = {
1329 .trace = trace_user_stack_print,
1330};
1331
1332static struct trace_event trace_user_stack_event = {
1333 .type = TRACE_USER_STACK,
1334 .funcs = &trace_user_stack_funcs,
1335};
1336
1337/* TRACE_HWLAT */
1338static enum print_line_t
1339trace_hwlat_print(struct trace_iterator *iter, int flags,
1340 struct trace_event *event)
1341{
1342 struct trace_entry *entry = iter->ent;
1343 struct trace_seq *s = &iter->seq;
1344 struct hwlat_entry *field;
1345
1346 trace_assign_type(field, entry);
1347
1348 trace_seq_printf(s, "#%-5u inner/outer(us): %4llu/%-5llu ts:%lld.%09ld count:%d",
1349 field->seqnum,
1350 field->duration,
1351 field->outer_duration,
1352 (long long)field->timestamp.tv_sec,
1353 field->timestamp.tv_nsec, field->count);
1354
1355 if (field->nmi_count) {
1356 /*
1357 * The generic sched_clock() is not NMI safe, thus
1358 * we only record the count and not the time.
1359 */
1360 if (!IS_ENABLED(CONFIG_GENERIC_SCHED_CLOCK))
1361 trace_seq_printf(s, " nmi-total:%llu",
1362 field->nmi_total_ts);
1363 trace_seq_printf(s, " nmi-count:%u",
1364 field->nmi_count);
1365 }
1366
1367 trace_seq_putc(s, '\n');
1368
1369 return trace_handle_return(s);
1370}
1371
1372static enum print_line_t
1373trace_hwlat_raw(struct trace_iterator *iter, int flags,
1374 struct trace_event *event)
1375{
1376 struct hwlat_entry *field;
1377 struct trace_seq *s = &iter->seq;
1378
1379 trace_assign_type(field, iter->ent);
1380
1381 trace_seq_printf(s, "%llu %lld %lld %09ld %u\n",
1382 field->duration,
1383 field->outer_duration,
1384 (long long)field->timestamp.tv_sec,
1385 field->timestamp.tv_nsec,
1386 field->seqnum);
1387
1388 return trace_handle_return(s);
1389}
1390
1391static struct trace_event_functions trace_hwlat_funcs = {
1392 .trace = trace_hwlat_print,
1393 .raw = trace_hwlat_raw,
1394};
1395
1396static struct trace_event trace_hwlat_event = {
1397 .type = TRACE_HWLAT,
1398 .funcs = &trace_hwlat_funcs,
1399};
1400
1401/* TRACE_OSNOISE */
1402static enum print_line_t
1403trace_osnoise_print(struct trace_iterator *iter, int flags,
1404 struct trace_event *event)
1405{
1406 struct trace_entry *entry = iter->ent;
1407 struct trace_seq *s = &iter->seq;
1408 struct osnoise_entry *field;
1409 u64 ratio, ratio_dec;
1410 u64 net_runtime;
1411
1412 trace_assign_type(field, entry);
1413
1414 /*
1415 * compute the available % of cpu time.
1416 */
1417 net_runtime = field->runtime - field->noise;
1418 ratio = net_runtime * 10000000;
1419 do_div(ratio, field->runtime);
1420 ratio_dec = do_div(ratio, 100000);
1421
1422 trace_seq_printf(s, "%llu %10llu %3llu.%05llu %7llu",
1423 field->runtime,
1424 field->noise,
1425 ratio, ratio_dec,
1426 field->max_sample);
1427
1428 trace_seq_printf(s, " %6u", field->hw_count);
1429 trace_seq_printf(s, " %6u", field->nmi_count);
1430 trace_seq_printf(s, " %6u", field->irq_count);
1431 trace_seq_printf(s, " %6u", field->softirq_count);
1432 trace_seq_printf(s, " %6u", field->thread_count);
1433
1434 trace_seq_putc(s, '\n');
1435
1436 return trace_handle_return(s);
1437}
1438
1439static enum print_line_t
1440trace_osnoise_raw(struct trace_iterator *iter, int flags,
1441 struct trace_event *event)
1442{
1443 struct osnoise_entry *field;
1444 struct trace_seq *s = &iter->seq;
1445
1446 trace_assign_type(field, iter->ent);
1447
1448 trace_seq_printf(s, "%lld %llu %llu %u %u %u %u %u\n",
1449 field->runtime,
1450 field->noise,
1451 field->max_sample,
1452 field->hw_count,
1453 field->nmi_count,
1454 field->irq_count,
1455 field->softirq_count,
1456 field->thread_count);
1457
1458 return trace_handle_return(s);
1459}
1460
1461static struct trace_event_functions trace_osnoise_funcs = {
1462 .trace = trace_osnoise_print,
1463 .raw = trace_osnoise_raw,
1464};
1465
1466static struct trace_event trace_osnoise_event = {
1467 .type = TRACE_OSNOISE,
1468 .funcs = &trace_osnoise_funcs,
1469};
1470
1471/* TRACE_TIMERLAT */
1472
1473static char *timerlat_lat_context[] = {"irq", "thread", "user-ret"};
1474static enum print_line_t
1475trace_timerlat_print(struct trace_iterator *iter, int flags,
1476 struct trace_event *event)
1477{
1478 struct trace_entry *entry = iter->ent;
1479 struct trace_seq *s = &iter->seq;
1480 struct timerlat_entry *field;
1481
1482 trace_assign_type(field, entry);
1483
1484 trace_seq_printf(s, "#%-5u context %6s timer_latency %9llu ns\n",
1485 field->seqnum,
1486 timerlat_lat_context[field->context],
1487 field->timer_latency);
1488
1489 return trace_handle_return(s);
1490}
1491
1492static enum print_line_t
1493trace_timerlat_raw(struct trace_iterator *iter, int flags,
1494 struct trace_event *event)
1495{
1496 struct timerlat_entry *field;
1497 struct trace_seq *s = &iter->seq;
1498
1499 trace_assign_type(field, iter->ent);
1500
1501 trace_seq_printf(s, "%u %d %llu\n",
1502 field->seqnum,
1503 field->context,
1504 field->timer_latency);
1505
1506 return trace_handle_return(s);
1507}
1508
1509static struct trace_event_functions trace_timerlat_funcs = {
1510 .trace = trace_timerlat_print,
1511 .raw = trace_timerlat_raw,
1512};
1513
1514static struct trace_event trace_timerlat_event = {
1515 .type = TRACE_TIMERLAT,
1516 .funcs = &trace_timerlat_funcs,
1517};
1518
1519/* TRACE_BPUTS */
1520static enum print_line_t
1521trace_bputs_print(struct trace_iterator *iter, int flags,
1522 struct trace_event *event)
1523{
1524 struct trace_entry *entry = iter->ent;
1525 struct trace_seq *s = &iter->seq;
1526 struct bputs_entry *field;
1527
1528 trace_assign_type(field, entry);
1529
1530 seq_print_ip_sym(s, field->ip, flags);
1531 trace_seq_puts(s, ": ");
1532 trace_seq_puts(s, field->str);
1533
1534 return trace_handle_return(s);
1535}
1536
1537
1538static enum print_line_t
1539trace_bputs_raw(struct trace_iterator *iter, int flags,
1540 struct trace_event *event)
1541{
1542 struct bputs_entry *field;
1543 struct trace_seq *s = &iter->seq;
1544
1545 trace_assign_type(field, iter->ent);
1546
1547 trace_seq_printf(s, ": %lx : ", field->ip);
1548 trace_seq_puts(s, field->str);
1549
1550 return trace_handle_return(s);
1551}
1552
1553static struct trace_event_functions trace_bputs_funcs = {
1554 .trace = trace_bputs_print,
1555 .raw = trace_bputs_raw,
1556};
1557
1558static struct trace_event trace_bputs_event = {
1559 .type = TRACE_BPUTS,
1560 .funcs = &trace_bputs_funcs,
1561};
1562
1563/* TRACE_BPRINT */
1564static enum print_line_t
1565trace_bprint_print(struct trace_iterator *iter, int flags,
1566 struct trace_event *event)
1567{
1568 struct trace_entry *entry = iter->ent;
1569 struct trace_seq *s = &iter->seq;
1570 struct bprint_entry *field;
1571
1572 trace_assign_type(field, entry);
1573
1574 seq_print_ip_sym(s, field->ip, flags);
1575 trace_seq_puts(s, ": ");
1576 trace_seq_bprintf(s, field->fmt, field->buf);
1577
1578 return trace_handle_return(s);
1579}
1580
1581
1582static enum print_line_t
1583trace_bprint_raw(struct trace_iterator *iter, int flags,
1584 struct trace_event *event)
1585{
1586 struct bprint_entry *field;
1587 struct trace_seq *s = &iter->seq;
1588
1589 trace_assign_type(field, iter->ent);
1590
1591 trace_seq_printf(s, ": %lx : ", field->ip);
1592 trace_seq_bprintf(s, field->fmt, field->buf);
1593
1594 return trace_handle_return(s);
1595}
1596
1597static struct trace_event_functions trace_bprint_funcs = {
1598 .trace = trace_bprint_print,
1599 .raw = trace_bprint_raw,
1600};
1601
1602static struct trace_event trace_bprint_event = {
1603 .type = TRACE_BPRINT,
1604 .funcs = &trace_bprint_funcs,
1605};
1606
1607/* TRACE_PRINT */
1608static enum print_line_t trace_print_print(struct trace_iterator *iter,
1609 int flags, struct trace_event *event)
1610{
1611 struct print_entry *field;
1612 struct trace_seq *s = &iter->seq;
1613 unsigned long ip;
1614
1615 trace_assign_type(field, iter->ent);
1616
1617 ip = field->ip + iter->tr->text_delta;
1618
1619 seq_print_ip_sym(s, ip, flags);
1620 trace_seq_printf(s, ": %s", field->buf);
1621
1622 return trace_handle_return(s);
1623}
1624
1625static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags,
1626 struct trace_event *event)
1627{
1628 struct print_entry *field;
1629
1630 trace_assign_type(field, iter->ent);
1631
1632 trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf);
1633
1634 return trace_handle_return(&iter->seq);
1635}
1636
1637static struct trace_event_functions trace_print_funcs = {
1638 .trace = trace_print_print,
1639 .raw = trace_print_raw,
1640};
1641
1642static struct trace_event trace_print_event = {
1643 .type = TRACE_PRINT,
1644 .funcs = &trace_print_funcs,
1645};
1646
1647static enum print_line_t trace_raw_data(struct trace_iterator *iter, int flags,
1648 struct trace_event *event)
1649{
1650 struct raw_data_entry *field;
1651 int i;
1652
1653 trace_assign_type(field, iter->ent);
1654
1655 trace_seq_printf(&iter->seq, "# %x buf:", field->id);
1656
1657 for (i = 0; i < iter->ent_size - offsetof(struct raw_data_entry, buf); i++)
1658 trace_seq_printf(&iter->seq, " %02x",
1659 (unsigned char)field->buf[i]);
1660
1661 trace_seq_putc(&iter->seq, '\n');
1662
1663 return trace_handle_return(&iter->seq);
1664}
1665
1666static struct trace_event_functions trace_raw_data_funcs = {
1667 .trace = trace_raw_data,
1668 .raw = trace_raw_data,
1669};
1670
1671static struct trace_event trace_raw_data_event = {
1672 .type = TRACE_RAW_DATA,
1673 .funcs = &trace_raw_data_funcs,
1674};
1675
1676static enum print_line_t
1677trace_func_repeats_raw(struct trace_iterator *iter, int flags,
1678 struct trace_event *event)
1679{
1680 struct func_repeats_entry *field;
1681 struct trace_seq *s = &iter->seq;
1682
1683 trace_assign_type(field, iter->ent);
1684
1685 trace_seq_printf(s, "%lu %lu %u %llu\n",
1686 field->ip,
1687 field->parent_ip,
1688 field->count,
1689 FUNC_REPEATS_GET_DELTA_TS(field));
1690
1691 return trace_handle_return(s);
1692}
1693
1694static enum print_line_t
1695trace_func_repeats_print(struct trace_iterator *iter, int flags,
1696 struct trace_event *event)
1697{
1698 struct func_repeats_entry *field;
1699 struct trace_seq *s = &iter->seq;
1700
1701 trace_assign_type(field, iter->ent);
1702
1703 print_fn_trace(s, field->ip, field->parent_ip, iter->tr->text_delta, flags);
1704 trace_seq_printf(s, " (repeats: %u, last_ts:", field->count);
1705 trace_print_time(s, iter,
1706 iter->ts - FUNC_REPEATS_GET_DELTA_TS(field));
1707 trace_seq_puts(s, ")\n");
1708
1709 return trace_handle_return(s);
1710}
1711
1712static struct trace_event_functions trace_func_repeats_funcs = {
1713 .trace = trace_func_repeats_print,
1714 .raw = trace_func_repeats_raw,
1715};
1716
1717static struct trace_event trace_func_repeats_event = {
1718 .type = TRACE_FUNC_REPEATS,
1719 .funcs = &trace_func_repeats_funcs,
1720};
1721
1722static struct trace_event *events[] __initdata = {
1723 &trace_fn_event,
1724 &trace_ctx_event,
1725 &trace_wake_event,
1726 &trace_stack_event,
1727 &trace_user_stack_event,
1728 &trace_bputs_event,
1729 &trace_bprint_event,
1730 &trace_print_event,
1731 &trace_hwlat_event,
1732 &trace_osnoise_event,
1733 &trace_timerlat_event,
1734 &trace_raw_data_event,
1735 &trace_func_repeats_event,
1736 NULL
1737};
1738
1739__init int init_events(void)
1740{
1741 struct trace_event *event;
1742 int i, ret;
1743
1744 for (i = 0; events[i]; i++) {
1745 event = events[i];
1746 ret = register_trace_event(event);
1747 WARN_ONCE(!ret, "event %d failed to register", event->type);
1748 }
1749
1750 return 0;
1751}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * trace_output.c
4 *
5 * Copyright (C) 2008 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
6 *
7 */
8#include <linux/module.h>
9#include <linux/mutex.h>
10#include <linux/ftrace.h>
11#include <linux/sched/clock.h>
12#include <linux/sched/mm.h>
13
14#include "trace_output.h"
15
16/* must be a power of 2 */
17#define EVENT_HASHSIZE 128
18
19DECLARE_RWSEM(trace_event_sem);
20
21static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly;
22
23static int next_event_type = __TRACE_LAST_TYPE;
24
25enum print_line_t trace_print_bputs_msg_only(struct trace_iterator *iter)
26{
27 struct trace_seq *s = &iter->seq;
28 struct trace_entry *entry = iter->ent;
29 struct bputs_entry *field;
30
31 trace_assign_type(field, entry);
32
33 trace_seq_puts(s, field->str);
34
35 return trace_handle_return(s);
36}
37
38enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter)
39{
40 struct trace_seq *s = &iter->seq;
41 struct trace_entry *entry = iter->ent;
42 struct bprint_entry *field;
43
44 trace_assign_type(field, entry);
45
46 trace_seq_bprintf(s, field->fmt, field->buf);
47
48 return trace_handle_return(s);
49}
50
51enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter)
52{
53 struct trace_seq *s = &iter->seq;
54 struct trace_entry *entry = iter->ent;
55 struct print_entry *field;
56
57 trace_assign_type(field, entry);
58
59 trace_seq_puts(s, field->buf);
60
61 return trace_handle_return(s);
62}
63
64const char *
65trace_print_flags_seq(struct trace_seq *p, const char *delim,
66 unsigned long flags,
67 const struct trace_print_flags *flag_array)
68{
69 unsigned long mask;
70 const char *str;
71 const char *ret = trace_seq_buffer_ptr(p);
72 int i, first = 1;
73
74 for (i = 0; flag_array[i].name && flags; i++) {
75
76 mask = flag_array[i].mask;
77 if ((flags & mask) != mask)
78 continue;
79
80 str = flag_array[i].name;
81 flags &= ~mask;
82 if (!first && delim)
83 trace_seq_puts(p, delim);
84 else
85 first = 0;
86 trace_seq_puts(p, str);
87 }
88
89 /* check for left over flags */
90 if (flags) {
91 if (!first && delim)
92 trace_seq_puts(p, delim);
93 trace_seq_printf(p, "0x%lx", flags);
94 }
95
96 trace_seq_putc(p, 0);
97
98 return ret;
99}
100EXPORT_SYMBOL(trace_print_flags_seq);
101
102const char *
103trace_print_symbols_seq(struct trace_seq *p, unsigned long val,
104 const struct trace_print_flags *symbol_array)
105{
106 int i;
107 const char *ret = trace_seq_buffer_ptr(p);
108
109 for (i = 0; symbol_array[i].name; i++) {
110
111 if (val != symbol_array[i].mask)
112 continue;
113
114 trace_seq_puts(p, symbol_array[i].name);
115 break;
116 }
117
118 if (ret == (const char *)(trace_seq_buffer_ptr(p)))
119 trace_seq_printf(p, "0x%lx", val);
120
121 trace_seq_putc(p, 0);
122
123 return ret;
124}
125EXPORT_SYMBOL(trace_print_symbols_seq);
126
127#if BITS_PER_LONG == 32
128const char *
129trace_print_flags_seq_u64(struct trace_seq *p, const char *delim,
130 unsigned long long flags,
131 const struct trace_print_flags_u64 *flag_array)
132{
133 unsigned long long mask;
134 const char *str;
135 const char *ret = trace_seq_buffer_ptr(p);
136 int i, first = 1;
137
138 for (i = 0; flag_array[i].name && flags; i++) {
139
140 mask = flag_array[i].mask;
141 if ((flags & mask) != mask)
142 continue;
143
144 str = flag_array[i].name;
145 flags &= ~mask;
146 if (!first && delim)
147 trace_seq_puts(p, delim);
148 else
149 first = 0;
150 trace_seq_puts(p, str);
151 }
152
153 /* check for left over flags */
154 if (flags) {
155 if (!first && delim)
156 trace_seq_puts(p, delim);
157 trace_seq_printf(p, "0x%llx", flags);
158 }
159
160 trace_seq_putc(p, 0);
161
162 return ret;
163}
164EXPORT_SYMBOL(trace_print_flags_seq_u64);
165
166const char *
167trace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val,
168 const struct trace_print_flags_u64 *symbol_array)
169{
170 int i;
171 const char *ret = trace_seq_buffer_ptr(p);
172
173 for (i = 0; symbol_array[i].name; i++) {
174
175 if (val != symbol_array[i].mask)
176 continue;
177
178 trace_seq_puts(p, symbol_array[i].name);
179 break;
180 }
181
182 if (ret == (const char *)(trace_seq_buffer_ptr(p)))
183 trace_seq_printf(p, "0x%llx", val);
184
185 trace_seq_putc(p, 0);
186
187 return ret;
188}
189EXPORT_SYMBOL(trace_print_symbols_seq_u64);
190#endif
191
192const char *
193trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr,
194 unsigned int bitmask_size)
195{
196 const char *ret = trace_seq_buffer_ptr(p);
197
198 trace_seq_bitmask(p, bitmask_ptr, bitmask_size * 8);
199 trace_seq_putc(p, 0);
200
201 return ret;
202}
203EXPORT_SYMBOL_GPL(trace_print_bitmask_seq);
204
205/**
206 * trace_print_hex_seq - print buffer as hex sequence
207 * @p: trace seq struct to write to
208 * @buf: The buffer to print
209 * @buf_len: Length of @buf in bytes
210 * @concatenate: Print @buf as single hex string or with spacing
211 *
212 * Prints the passed buffer as a hex sequence either as a whole,
213 * single hex string if @concatenate is true or with spacing after
214 * each byte in case @concatenate is false.
215 */
216const char *
217trace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len,
218 bool concatenate)
219{
220 int i;
221 const char *ret = trace_seq_buffer_ptr(p);
222 const char *fmt = concatenate ? "%*phN" : "%*ph";
223
224 for (i = 0; i < buf_len; i += 16)
225 trace_seq_printf(p, fmt, min(buf_len - i, 16), &buf[i]);
226 trace_seq_putc(p, 0);
227
228 return ret;
229}
230EXPORT_SYMBOL(trace_print_hex_seq);
231
232const char *
233trace_print_array_seq(struct trace_seq *p, const void *buf, int count,
234 size_t el_size)
235{
236 const char *ret = trace_seq_buffer_ptr(p);
237 const char *prefix = "";
238 void *ptr = (void *)buf;
239 size_t buf_len = count * el_size;
240
241 trace_seq_putc(p, '{');
242
243 while (ptr < buf + buf_len) {
244 switch (el_size) {
245 case 1:
246 trace_seq_printf(p, "%s0x%x", prefix,
247 *(u8 *)ptr);
248 break;
249 case 2:
250 trace_seq_printf(p, "%s0x%x", prefix,
251 *(u16 *)ptr);
252 break;
253 case 4:
254 trace_seq_printf(p, "%s0x%x", prefix,
255 *(u32 *)ptr);
256 break;
257 case 8:
258 trace_seq_printf(p, "%s0x%llx", prefix,
259 *(u64 *)ptr);
260 break;
261 default:
262 trace_seq_printf(p, "BAD SIZE:%zu 0x%x", el_size,
263 *(u8 *)ptr);
264 el_size = 1;
265 }
266 prefix = ",";
267 ptr += el_size;
268 }
269
270 trace_seq_putc(p, '}');
271 trace_seq_putc(p, 0);
272
273 return ret;
274}
275EXPORT_SYMBOL(trace_print_array_seq);
276
277const char *
278trace_print_hex_dump_seq(struct trace_seq *p, const char *prefix_str,
279 int prefix_type, int rowsize, int groupsize,
280 const void *buf, size_t len, bool ascii)
281{
282 const char *ret = trace_seq_buffer_ptr(p);
283
284 trace_seq_putc(p, '\n');
285 trace_seq_hex_dump(p, prefix_str, prefix_type,
286 rowsize, groupsize, buf, len, ascii);
287 trace_seq_putc(p, 0);
288 return ret;
289}
290EXPORT_SYMBOL(trace_print_hex_dump_seq);
291
292int trace_raw_output_prep(struct trace_iterator *iter,
293 struct trace_event *trace_event)
294{
295 struct trace_event_call *event;
296 struct trace_seq *s = &iter->seq;
297 struct trace_seq *p = &iter->tmp_seq;
298 struct trace_entry *entry;
299
300 event = container_of(trace_event, struct trace_event_call, event);
301 entry = iter->ent;
302
303 if (entry->type != event->event.type) {
304 WARN_ON_ONCE(1);
305 return TRACE_TYPE_UNHANDLED;
306 }
307
308 trace_seq_init(p);
309 trace_seq_printf(s, "%s: ", trace_event_name(event));
310
311 return trace_handle_return(s);
312}
313EXPORT_SYMBOL(trace_raw_output_prep);
314
315void trace_event_printf(struct trace_iterator *iter, const char *fmt, ...)
316{
317 va_list ap;
318
319 va_start(ap, fmt);
320 trace_check_vprintf(iter, trace_event_format(iter, fmt), ap);
321 va_end(ap);
322}
323EXPORT_SYMBOL(trace_event_printf);
324
325static int trace_output_raw(struct trace_iterator *iter, char *name,
326 char *fmt, va_list ap)
327{
328 struct trace_seq *s = &iter->seq;
329
330 trace_seq_printf(s, "%s: ", name);
331 trace_seq_vprintf(s, trace_event_format(iter, fmt), ap);
332
333 return trace_handle_return(s);
334}
335
336int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...)
337{
338 va_list ap;
339 int ret;
340
341 va_start(ap, fmt);
342 ret = trace_output_raw(iter, name, fmt, ap);
343 va_end(ap);
344
345 return ret;
346}
347EXPORT_SYMBOL_GPL(trace_output_call);
348
349#ifdef CONFIG_KRETPROBES
350static inline const char *kretprobed(const char *name)
351{
352 static const char tramp_name[] = "kretprobe_trampoline";
353 int size = sizeof(tramp_name);
354
355 if (strncmp(tramp_name, name, size) == 0)
356 return "[unknown/kretprobe'd]";
357 return name;
358}
359#else
360static inline const char *kretprobed(const char *name)
361{
362 return name;
363}
364#endif /* CONFIG_KRETPROBES */
365
366void
367trace_seq_print_sym(struct trace_seq *s, unsigned long address, bool offset)
368{
369#ifdef CONFIG_KALLSYMS
370 char str[KSYM_SYMBOL_LEN];
371 const char *name;
372
373 if (offset)
374 sprint_symbol(str, address);
375 else
376 kallsyms_lookup(address, NULL, NULL, NULL, str);
377 name = kretprobed(str);
378
379 if (name && strlen(name)) {
380 trace_seq_puts(s, name);
381 return;
382 }
383#endif
384 trace_seq_printf(s, "0x%08lx", address);
385}
386
387#ifndef CONFIG_64BIT
388# define IP_FMT "%08lx"
389#else
390# define IP_FMT "%016lx"
391#endif
392
393static int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
394 unsigned long ip, unsigned long sym_flags)
395{
396 struct file *file = NULL;
397 unsigned long vmstart = 0;
398 int ret = 1;
399
400 if (s->full)
401 return 0;
402
403 if (mm) {
404 const struct vm_area_struct *vma;
405
406 mmap_read_lock(mm);
407 vma = find_vma(mm, ip);
408 if (vma) {
409 file = vma->vm_file;
410 vmstart = vma->vm_start;
411 }
412 if (file) {
413 ret = trace_seq_path(s, &file->f_path);
414 if (ret)
415 trace_seq_printf(s, "[+0x%lx]",
416 ip - vmstart);
417 }
418 mmap_read_unlock(mm);
419 }
420 if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file))
421 trace_seq_printf(s, " <" IP_FMT ">", ip);
422 return !trace_seq_has_overflowed(s);
423}
424
425int
426seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
427{
428 if (!ip) {
429 trace_seq_putc(s, '0');
430 goto out;
431 }
432
433 trace_seq_print_sym(s, ip, sym_flags & TRACE_ITER_SYM_OFFSET);
434
435 if (sym_flags & TRACE_ITER_SYM_ADDR)
436 trace_seq_printf(s, " <" IP_FMT ">", ip);
437
438 out:
439 return !trace_seq_has_overflowed(s);
440}
441
442/**
443 * trace_print_lat_fmt - print the irq, preempt and lockdep fields
444 * @s: trace seq struct to write to
445 * @entry: The trace entry field from the ring buffer
446 *
447 * Prints the generic fields of irqs off, in hard or softirq, preempt
448 * count.
449 */
450int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
451{
452 char hardsoft_irq;
453 char need_resched;
454 char irqs_off;
455 int hardirq;
456 int softirq;
457 int nmi;
458
459 nmi = entry->flags & TRACE_FLAG_NMI;
460 hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
461 softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
462
463 irqs_off =
464 (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
465 (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' :
466 '.';
467
468 switch (entry->flags & (TRACE_FLAG_NEED_RESCHED |
469 TRACE_FLAG_PREEMPT_RESCHED)) {
470 case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED:
471 need_resched = 'N';
472 break;
473 case TRACE_FLAG_NEED_RESCHED:
474 need_resched = 'n';
475 break;
476 case TRACE_FLAG_PREEMPT_RESCHED:
477 need_resched = 'p';
478 break;
479 default:
480 need_resched = '.';
481 break;
482 }
483
484 hardsoft_irq =
485 (nmi && hardirq) ? 'Z' :
486 nmi ? 'z' :
487 (hardirq && softirq) ? 'H' :
488 hardirq ? 'h' :
489 softirq ? 's' :
490 '.' ;
491
492 trace_seq_printf(s, "%c%c%c",
493 irqs_off, need_resched, hardsoft_irq);
494
495 if (entry->preempt_count)
496 trace_seq_printf(s, "%x", entry->preempt_count);
497 else
498 trace_seq_putc(s, '.');
499
500 return !trace_seq_has_overflowed(s);
501}
502
503static int
504lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
505{
506 char comm[TASK_COMM_LEN];
507
508 trace_find_cmdline(entry->pid, comm);
509
510 trace_seq_printf(s, "%8.8s-%-7d %3d",
511 comm, entry->pid, cpu);
512
513 return trace_print_lat_fmt(s, entry);
514}
515
516#undef MARK
517#define MARK(v, s) {.val = v, .sym = s}
518/* trace overhead mark */
519static const struct trace_mark {
520 unsigned long long val; /* unit: nsec */
521 char sym;
522} mark[] = {
523 MARK(1000000000ULL , '$'), /* 1 sec */
524 MARK(100000000ULL , '@'), /* 100 msec */
525 MARK(10000000ULL , '*'), /* 10 msec */
526 MARK(1000000ULL , '#'), /* 1000 usecs */
527 MARK(100000ULL , '!'), /* 100 usecs */
528 MARK(10000ULL , '+'), /* 10 usecs */
529};
530#undef MARK
531
532char trace_find_mark(unsigned long long d)
533{
534 int i;
535 int size = ARRAY_SIZE(mark);
536
537 for (i = 0; i < size; i++) {
538 if (d > mark[i].val)
539 break;
540 }
541
542 return (i == size) ? ' ' : mark[i].sym;
543}
544
545static int
546lat_print_timestamp(struct trace_iterator *iter, u64 next_ts)
547{
548 struct trace_array *tr = iter->tr;
549 unsigned long verbose = tr->trace_flags & TRACE_ITER_VERBOSE;
550 unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS;
551 unsigned long long abs_ts = iter->ts - iter->array_buffer->time_start;
552 unsigned long long rel_ts = next_ts - iter->ts;
553 struct trace_seq *s = &iter->seq;
554
555 if (in_ns) {
556 abs_ts = ns2usecs(abs_ts);
557 rel_ts = ns2usecs(rel_ts);
558 }
559
560 if (verbose && in_ns) {
561 unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC);
562 unsigned long abs_msec = (unsigned long)abs_ts;
563 unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC);
564 unsigned long rel_msec = (unsigned long)rel_ts;
565
566 trace_seq_printf(
567 s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ",
568 ns2usecs(iter->ts),
569 abs_msec, abs_usec,
570 rel_msec, rel_usec);
571
572 } else if (verbose && !in_ns) {
573 trace_seq_printf(
574 s, "[%016llx] %lld (+%lld): ",
575 iter->ts, abs_ts, rel_ts);
576
577 } else if (!verbose && in_ns) {
578 trace_seq_printf(
579 s, " %4lldus%c: ",
580 abs_ts,
581 trace_find_mark(rel_ts * NSEC_PER_USEC));
582
583 } else { /* !verbose && !in_ns */
584 trace_seq_printf(s, " %4lld: ", abs_ts);
585 }
586
587 return !trace_seq_has_overflowed(s);
588}
589
590static void trace_print_time(struct trace_seq *s, struct trace_iterator *iter,
591 unsigned long long ts)
592{
593 unsigned long secs, usec_rem;
594 unsigned long long t;
595
596 if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) {
597 t = ns2usecs(ts);
598 usec_rem = do_div(t, USEC_PER_SEC);
599 secs = (unsigned long)t;
600 trace_seq_printf(s, " %5lu.%06lu", secs, usec_rem);
601 } else
602 trace_seq_printf(s, " %12llu", ts);
603}
604
605int trace_print_context(struct trace_iterator *iter)
606{
607 struct trace_array *tr = iter->tr;
608 struct trace_seq *s = &iter->seq;
609 struct trace_entry *entry = iter->ent;
610 char comm[TASK_COMM_LEN];
611
612 trace_find_cmdline(entry->pid, comm);
613
614 trace_seq_printf(s, "%16s-%-7d ", comm, entry->pid);
615
616 if (tr->trace_flags & TRACE_ITER_RECORD_TGID) {
617 unsigned int tgid = trace_find_tgid(entry->pid);
618
619 if (!tgid)
620 trace_seq_printf(s, "(-------) ");
621 else
622 trace_seq_printf(s, "(%7d) ", tgid);
623 }
624
625 trace_seq_printf(s, "[%03d] ", iter->cpu);
626
627 if (tr->trace_flags & TRACE_ITER_IRQ_INFO)
628 trace_print_lat_fmt(s, entry);
629
630 trace_print_time(s, iter, iter->ts);
631 trace_seq_puts(s, ": ");
632
633 return !trace_seq_has_overflowed(s);
634}
635
636int trace_print_lat_context(struct trace_iterator *iter)
637{
638 struct trace_entry *entry, *next_entry;
639 struct trace_array *tr = iter->tr;
640 struct trace_seq *s = &iter->seq;
641 unsigned long verbose = (tr->trace_flags & TRACE_ITER_VERBOSE);
642 u64 next_ts;
643
644 next_entry = trace_find_next_entry(iter, NULL, &next_ts);
645 if (!next_entry)
646 next_ts = iter->ts;
647
648 /* trace_find_next_entry() may change iter->ent */
649 entry = iter->ent;
650
651 if (verbose) {
652 char comm[TASK_COMM_LEN];
653
654 trace_find_cmdline(entry->pid, comm);
655
656 trace_seq_printf(
657 s, "%16s %7d %3d %d %08x %08lx ",
658 comm, entry->pid, iter->cpu, entry->flags,
659 entry->preempt_count, iter->idx);
660 } else {
661 lat_print_generic(s, entry, iter->cpu);
662 }
663
664 lat_print_timestamp(iter, next_ts);
665
666 return !trace_seq_has_overflowed(s);
667}
668
669/**
670 * ftrace_find_event - find a registered event
671 * @type: the type of event to look for
672 *
673 * Returns an event of type @type otherwise NULL
674 * Called with trace_event_read_lock() held.
675 */
676struct trace_event *ftrace_find_event(int type)
677{
678 struct trace_event *event;
679 unsigned key;
680
681 key = type & (EVENT_HASHSIZE - 1);
682
683 hlist_for_each_entry(event, &event_hash[key], node) {
684 if (event->type == type)
685 return event;
686 }
687
688 return NULL;
689}
690
691static LIST_HEAD(ftrace_event_list);
692
693static int trace_search_list(struct list_head **list)
694{
695 struct trace_event *e;
696 int next = __TRACE_LAST_TYPE;
697
698 if (list_empty(&ftrace_event_list)) {
699 *list = &ftrace_event_list;
700 return next;
701 }
702
703 /*
704 * We used up all possible max events,
705 * lets see if somebody freed one.
706 */
707 list_for_each_entry(e, &ftrace_event_list, list) {
708 if (e->type != next)
709 break;
710 next++;
711 }
712
713 /* Did we used up all 65 thousand events??? */
714 if (next > TRACE_EVENT_TYPE_MAX)
715 return 0;
716
717 *list = &e->list;
718 return next;
719}
720
721void trace_event_read_lock(void)
722{
723 down_read(&trace_event_sem);
724}
725
726void trace_event_read_unlock(void)
727{
728 up_read(&trace_event_sem);
729}
730
731/**
732 * register_trace_event - register output for an event type
733 * @event: the event type to register
734 *
735 * Event types are stored in a hash and this hash is used to
736 * find a way to print an event. If the @event->type is set
737 * then it will use that type, otherwise it will assign a
738 * type to use.
739 *
740 * If you assign your own type, please make sure it is added
741 * to the trace_type enum in trace.h, to avoid collisions
742 * with the dynamic types.
743 *
744 * Returns the event type number or zero on error.
745 */
746int register_trace_event(struct trace_event *event)
747{
748 unsigned key;
749 int ret = 0;
750
751 down_write(&trace_event_sem);
752
753 if (WARN_ON(!event))
754 goto out;
755
756 if (WARN_ON(!event->funcs))
757 goto out;
758
759 INIT_LIST_HEAD(&event->list);
760
761 if (!event->type) {
762 struct list_head *list = NULL;
763
764 if (next_event_type > TRACE_EVENT_TYPE_MAX) {
765
766 event->type = trace_search_list(&list);
767 if (!event->type)
768 goto out;
769
770 } else {
771
772 event->type = next_event_type++;
773 list = &ftrace_event_list;
774 }
775
776 if (WARN_ON(ftrace_find_event(event->type)))
777 goto out;
778
779 list_add_tail(&event->list, list);
780
781 } else if (event->type > __TRACE_LAST_TYPE) {
782 printk(KERN_WARNING "Need to add type to trace.h\n");
783 WARN_ON(1);
784 goto out;
785 } else {
786 /* Is this event already used */
787 if (ftrace_find_event(event->type))
788 goto out;
789 }
790
791 if (event->funcs->trace == NULL)
792 event->funcs->trace = trace_nop_print;
793 if (event->funcs->raw == NULL)
794 event->funcs->raw = trace_nop_print;
795 if (event->funcs->hex == NULL)
796 event->funcs->hex = trace_nop_print;
797 if (event->funcs->binary == NULL)
798 event->funcs->binary = trace_nop_print;
799
800 key = event->type & (EVENT_HASHSIZE - 1);
801
802 hlist_add_head(&event->node, &event_hash[key]);
803
804 ret = event->type;
805 out:
806 up_write(&trace_event_sem);
807
808 return ret;
809}
810EXPORT_SYMBOL_GPL(register_trace_event);
811
812/*
813 * Used by module code with the trace_event_sem held for write.
814 */
815int __unregister_trace_event(struct trace_event *event)
816{
817 hlist_del(&event->node);
818 list_del(&event->list);
819 return 0;
820}
821
822/**
823 * unregister_trace_event - remove a no longer used event
824 * @event: the event to remove
825 */
826int unregister_trace_event(struct trace_event *event)
827{
828 down_write(&trace_event_sem);
829 __unregister_trace_event(event);
830 up_write(&trace_event_sem);
831
832 return 0;
833}
834EXPORT_SYMBOL_GPL(unregister_trace_event);
835
836/*
837 * Standard events
838 */
839
840enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags,
841 struct trace_event *event)
842{
843 trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type);
844
845 return trace_handle_return(&iter->seq);
846}
847
848static void print_fn_trace(struct trace_seq *s, unsigned long ip,
849 unsigned long parent_ip, int flags)
850{
851 seq_print_ip_sym(s, ip, flags);
852
853 if ((flags & TRACE_ITER_PRINT_PARENT) && parent_ip) {
854 trace_seq_puts(s, " <-");
855 seq_print_ip_sym(s, parent_ip, flags);
856 }
857}
858
859/* TRACE_FN */
860static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags,
861 struct trace_event *event)
862{
863 struct ftrace_entry *field;
864 struct trace_seq *s = &iter->seq;
865
866 trace_assign_type(field, iter->ent);
867
868 print_fn_trace(s, field->ip, field->parent_ip, flags);
869 trace_seq_putc(s, '\n');
870
871 return trace_handle_return(s);
872}
873
874static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags,
875 struct trace_event *event)
876{
877 struct ftrace_entry *field;
878
879 trace_assign_type(field, iter->ent);
880
881 trace_seq_printf(&iter->seq, "%lx %lx\n",
882 field->ip,
883 field->parent_ip);
884
885 return trace_handle_return(&iter->seq);
886}
887
888static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags,
889 struct trace_event *event)
890{
891 struct ftrace_entry *field;
892 struct trace_seq *s = &iter->seq;
893
894 trace_assign_type(field, iter->ent);
895
896 SEQ_PUT_HEX_FIELD(s, field->ip);
897 SEQ_PUT_HEX_FIELD(s, field->parent_ip);
898
899 return trace_handle_return(s);
900}
901
902static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags,
903 struct trace_event *event)
904{
905 struct ftrace_entry *field;
906 struct trace_seq *s = &iter->seq;
907
908 trace_assign_type(field, iter->ent);
909
910 SEQ_PUT_FIELD(s, field->ip);
911 SEQ_PUT_FIELD(s, field->parent_ip);
912
913 return trace_handle_return(s);
914}
915
916static struct trace_event_functions trace_fn_funcs = {
917 .trace = trace_fn_trace,
918 .raw = trace_fn_raw,
919 .hex = trace_fn_hex,
920 .binary = trace_fn_bin,
921};
922
923static struct trace_event trace_fn_event = {
924 .type = TRACE_FN,
925 .funcs = &trace_fn_funcs,
926};
927
928/* TRACE_CTX an TRACE_WAKE */
929static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
930 char *delim)
931{
932 struct ctx_switch_entry *field;
933 char comm[TASK_COMM_LEN];
934 int S, T;
935
936
937 trace_assign_type(field, iter->ent);
938
939 T = task_index_to_char(field->next_state);
940 S = task_index_to_char(field->prev_state);
941 trace_find_cmdline(field->next_pid, comm);
942 trace_seq_printf(&iter->seq,
943 " %7d:%3d:%c %s [%03d] %7d:%3d:%c %s\n",
944 field->prev_pid,
945 field->prev_prio,
946 S, delim,
947 field->next_cpu,
948 field->next_pid,
949 field->next_prio,
950 T, comm);
951
952 return trace_handle_return(&iter->seq);
953}
954
955static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags,
956 struct trace_event *event)
957{
958 return trace_ctxwake_print(iter, "==>");
959}
960
961static enum print_line_t trace_wake_print(struct trace_iterator *iter,
962 int flags, struct trace_event *event)
963{
964 return trace_ctxwake_print(iter, " +");
965}
966
967static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
968{
969 struct ctx_switch_entry *field;
970 int T;
971
972 trace_assign_type(field, iter->ent);
973
974 if (!S)
975 S = task_index_to_char(field->prev_state);
976 T = task_index_to_char(field->next_state);
977 trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n",
978 field->prev_pid,
979 field->prev_prio,
980 S,
981 field->next_cpu,
982 field->next_pid,
983 field->next_prio,
984 T);
985
986 return trace_handle_return(&iter->seq);
987}
988
989static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags,
990 struct trace_event *event)
991{
992 return trace_ctxwake_raw(iter, 0);
993}
994
995static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags,
996 struct trace_event *event)
997{
998 return trace_ctxwake_raw(iter, '+');
999}
1000
1001
1002static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
1003{
1004 struct ctx_switch_entry *field;
1005 struct trace_seq *s = &iter->seq;
1006 int T;
1007
1008 trace_assign_type(field, iter->ent);
1009
1010 if (!S)
1011 S = task_index_to_char(field->prev_state);
1012 T = task_index_to_char(field->next_state);
1013
1014 SEQ_PUT_HEX_FIELD(s, field->prev_pid);
1015 SEQ_PUT_HEX_FIELD(s, field->prev_prio);
1016 SEQ_PUT_HEX_FIELD(s, S);
1017 SEQ_PUT_HEX_FIELD(s, field->next_cpu);
1018 SEQ_PUT_HEX_FIELD(s, field->next_pid);
1019 SEQ_PUT_HEX_FIELD(s, field->next_prio);
1020 SEQ_PUT_HEX_FIELD(s, T);
1021
1022 return trace_handle_return(s);
1023}
1024
1025static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags,
1026 struct trace_event *event)
1027{
1028 return trace_ctxwake_hex(iter, 0);
1029}
1030
1031static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags,
1032 struct trace_event *event)
1033{
1034 return trace_ctxwake_hex(iter, '+');
1035}
1036
1037static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
1038 int flags, struct trace_event *event)
1039{
1040 struct ctx_switch_entry *field;
1041 struct trace_seq *s = &iter->seq;
1042
1043 trace_assign_type(field, iter->ent);
1044
1045 SEQ_PUT_FIELD(s, field->prev_pid);
1046 SEQ_PUT_FIELD(s, field->prev_prio);
1047 SEQ_PUT_FIELD(s, field->prev_state);
1048 SEQ_PUT_FIELD(s, field->next_cpu);
1049 SEQ_PUT_FIELD(s, field->next_pid);
1050 SEQ_PUT_FIELD(s, field->next_prio);
1051 SEQ_PUT_FIELD(s, field->next_state);
1052
1053 return trace_handle_return(s);
1054}
1055
1056static struct trace_event_functions trace_ctx_funcs = {
1057 .trace = trace_ctx_print,
1058 .raw = trace_ctx_raw,
1059 .hex = trace_ctx_hex,
1060 .binary = trace_ctxwake_bin,
1061};
1062
1063static struct trace_event trace_ctx_event = {
1064 .type = TRACE_CTX,
1065 .funcs = &trace_ctx_funcs,
1066};
1067
1068static struct trace_event_functions trace_wake_funcs = {
1069 .trace = trace_wake_print,
1070 .raw = trace_wake_raw,
1071 .hex = trace_wake_hex,
1072 .binary = trace_ctxwake_bin,
1073};
1074
1075static struct trace_event trace_wake_event = {
1076 .type = TRACE_WAKE,
1077 .funcs = &trace_wake_funcs,
1078};
1079
1080/* TRACE_STACK */
1081
1082static enum print_line_t trace_stack_print(struct trace_iterator *iter,
1083 int flags, struct trace_event *event)
1084{
1085 struct stack_entry *field;
1086 struct trace_seq *s = &iter->seq;
1087 unsigned long *p;
1088 unsigned long *end;
1089
1090 trace_assign_type(field, iter->ent);
1091 end = (unsigned long *)((long)iter->ent + iter->ent_size);
1092
1093 trace_seq_puts(s, "<stack trace>\n");
1094
1095 for (p = field->caller; p && p < end && *p != ULONG_MAX; p++) {
1096
1097 if (trace_seq_has_overflowed(s))
1098 break;
1099
1100 trace_seq_puts(s, " => ");
1101 seq_print_ip_sym(s, *p, flags);
1102 trace_seq_putc(s, '\n');
1103 }
1104
1105 return trace_handle_return(s);
1106}
1107
1108static struct trace_event_functions trace_stack_funcs = {
1109 .trace = trace_stack_print,
1110};
1111
1112static struct trace_event trace_stack_event = {
1113 .type = TRACE_STACK,
1114 .funcs = &trace_stack_funcs,
1115};
1116
1117/* TRACE_USER_STACK */
1118static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
1119 int flags, struct trace_event *event)
1120{
1121 struct trace_array *tr = iter->tr;
1122 struct userstack_entry *field;
1123 struct trace_seq *s = &iter->seq;
1124 struct mm_struct *mm = NULL;
1125 unsigned int i;
1126
1127 trace_assign_type(field, iter->ent);
1128
1129 trace_seq_puts(s, "<user stack trace>\n");
1130
1131 if (tr->trace_flags & TRACE_ITER_SYM_USEROBJ) {
1132 struct task_struct *task;
1133 /*
1134 * we do the lookup on the thread group leader,
1135 * since individual threads might have already quit!
1136 */
1137 rcu_read_lock();
1138 task = find_task_by_vpid(field->tgid);
1139 if (task)
1140 mm = get_task_mm(task);
1141 rcu_read_unlock();
1142 }
1143
1144 for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
1145 unsigned long ip = field->caller[i];
1146
1147 if (!ip || trace_seq_has_overflowed(s))
1148 break;
1149
1150 trace_seq_puts(s, " => ");
1151 seq_print_user_ip(s, mm, ip, flags);
1152 trace_seq_putc(s, '\n');
1153 }
1154
1155 if (mm)
1156 mmput(mm);
1157
1158 return trace_handle_return(s);
1159}
1160
1161static struct trace_event_functions trace_user_stack_funcs = {
1162 .trace = trace_user_stack_print,
1163};
1164
1165static struct trace_event trace_user_stack_event = {
1166 .type = TRACE_USER_STACK,
1167 .funcs = &trace_user_stack_funcs,
1168};
1169
1170/* TRACE_HWLAT */
1171static enum print_line_t
1172trace_hwlat_print(struct trace_iterator *iter, int flags,
1173 struct trace_event *event)
1174{
1175 struct trace_entry *entry = iter->ent;
1176 struct trace_seq *s = &iter->seq;
1177 struct hwlat_entry *field;
1178
1179 trace_assign_type(field, entry);
1180
1181 trace_seq_printf(s, "#%-5u inner/outer(us): %4llu/%-5llu ts:%lld.%09ld count:%d",
1182 field->seqnum,
1183 field->duration,
1184 field->outer_duration,
1185 (long long)field->timestamp.tv_sec,
1186 field->timestamp.tv_nsec, field->count);
1187
1188 if (field->nmi_count) {
1189 /*
1190 * The generic sched_clock() is not NMI safe, thus
1191 * we only record the count and not the time.
1192 */
1193 if (!IS_ENABLED(CONFIG_GENERIC_SCHED_CLOCK))
1194 trace_seq_printf(s, " nmi-total:%llu",
1195 field->nmi_total_ts);
1196 trace_seq_printf(s, " nmi-count:%u",
1197 field->nmi_count);
1198 }
1199
1200 trace_seq_putc(s, '\n');
1201
1202 return trace_handle_return(s);
1203}
1204
1205static enum print_line_t
1206trace_hwlat_raw(struct trace_iterator *iter, int flags,
1207 struct trace_event *event)
1208{
1209 struct hwlat_entry *field;
1210 struct trace_seq *s = &iter->seq;
1211
1212 trace_assign_type(field, iter->ent);
1213
1214 trace_seq_printf(s, "%llu %lld %lld %09ld %u\n",
1215 field->duration,
1216 field->outer_duration,
1217 (long long)field->timestamp.tv_sec,
1218 field->timestamp.tv_nsec,
1219 field->seqnum);
1220
1221 return trace_handle_return(s);
1222}
1223
1224static struct trace_event_functions trace_hwlat_funcs = {
1225 .trace = trace_hwlat_print,
1226 .raw = trace_hwlat_raw,
1227};
1228
1229static struct trace_event trace_hwlat_event = {
1230 .type = TRACE_HWLAT,
1231 .funcs = &trace_hwlat_funcs,
1232};
1233
1234/* TRACE_OSNOISE */
1235static enum print_line_t
1236trace_osnoise_print(struct trace_iterator *iter, int flags,
1237 struct trace_event *event)
1238{
1239 struct trace_entry *entry = iter->ent;
1240 struct trace_seq *s = &iter->seq;
1241 struct osnoise_entry *field;
1242 u64 ratio, ratio_dec;
1243 u64 net_runtime;
1244
1245 trace_assign_type(field, entry);
1246
1247 /*
1248 * compute the available % of cpu time.
1249 */
1250 net_runtime = field->runtime - field->noise;
1251 ratio = net_runtime * 10000000;
1252 do_div(ratio, field->runtime);
1253 ratio_dec = do_div(ratio, 100000);
1254
1255 trace_seq_printf(s, "%llu %10llu %3llu.%05llu %7llu",
1256 field->runtime,
1257 field->noise,
1258 ratio, ratio_dec,
1259 field->max_sample);
1260
1261 trace_seq_printf(s, " %6u", field->hw_count);
1262 trace_seq_printf(s, " %6u", field->nmi_count);
1263 trace_seq_printf(s, " %6u", field->irq_count);
1264 trace_seq_printf(s, " %6u", field->softirq_count);
1265 trace_seq_printf(s, " %6u", field->thread_count);
1266
1267 trace_seq_putc(s, '\n');
1268
1269 return trace_handle_return(s);
1270}
1271
1272static enum print_line_t
1273trace_osnoise_raw(struct trace_iterator *iter, int flags,
1274 struct trace_event *event)
1275{
1276 struct osnoise_entry *field;
1277 struct trace_seq *s = &iter->seq;
1278
1279 trace_assign_type(field, iter->ent);
1280
1281 trace_seq_printf(s, "%lld %llu %llu %u %u %u %u %u\n",
1282 field->runtime,
1283 field->noise,
1284 field->max_sample,
1285 field->hw_count,
1286 field->nmi_count,
1287 field->irq_count,
1288 field->softirq_count,
1289 field->thread_count);
1290
1291 return trace_handle_return(s);
1292}
1293
1294static struct trace_event_functions trace_osnoise_funcs = {
1295 .trace = trace_osnoise_print,
1296 .raw = trace_osnoise_raw,
1297};
1298
1299static struct trace_event trace_osnoise_event = {
1300 .type = TRACE_OSNOISE,
1301 .funcs = &trace_osnoise_funcs,
1302};
1303
1304/* TRACE_TIMERLAT */
1305static enum print_line_t
1306trace_timerlat_print(struct trace_iterator *iter, int flags,
1307 struct trace_event *event)
1308{
1309 struct trace_entry *entry = iter->ent;
1310 struct trace_seq *s = &iter->seq;
1311 struct timerlat_entry *field;
1312
1313 trace_assign_type(field, entry);
1314
1315 trace_seq_printf(s, "#%-5u context %6s timer_latency %9llu ns\n",
1316 field->seqnum,
1317 field->context ? "thread" : "irq",
1318 field->timer_latency);
1319
1320 return trace_handle_return(s);
1321}
1322
1323static enum print_line_t
1324trace_timerlat_raw(struct trace_iterator *iter, int flags,
1325 struct trace_event *event)
1326{
1327 struct timerlat_entry *field;
1328 struct trace_seq *s = &iter->seq;
1329
1330 trace_assign_type(field, iter->ent);
1331
1332 trace_seq_printf(s, "%u %d %llu\n",
1333 field->seqnum,
1334 field->context,
1335 field->timer_latency);
1336
1337 return trace_handle_return(s);
1338}
1339
1340static struct trace_event_functions trace_timerlat_funcs = {
1341 .trace = trace_timerlat_print,
1342 .raw = trace_timerlat_raw,
1343};
1344
1345static struct trace_event trace_timerlat_event = {
1346 .type = TRACE_TIMERLAT,
1347 .funcs = &trace_timerlat_funcs,
1348};
1349
1350/* TRACE_BPUTS */
1351static enum print_line_t
1352trace_bputs_print(struct trace_iterator *iter, int flags,
1353 struct trace_event *event)
1354{
1355 struct trace_entry *entry = iter->ent;
1356 struct trace_seq *s = &iter->seq;
1357 struct bputs_entry *field;
1358
1359 trace_assign_type(field, entry);
1360
1361 seq_print_ip_sym(s, field->ip, flags);
1362 trace_seq_puts(s, ": ");
1363 trace_seq_puts(s, field->str);
1364
1365 return trace_handle_return(s);
1366}
1367
1368
1369static enum print_line_t
1370trace_bputs_raw(struct trace_iterator *iter, int flags,
1371 struct trace_event *event)
1372{
1373 struct bputs_entry *field;
1374 struct trace_seq *s = &iter->seq;
1375
1376 trace_assign_type(field, iter->ent);
1377
1378 trace_seq_printf(s, ": %lx : ", field->ip);
1379 trace_seq_puts(s, field->str);
1380
1381 return trace_handle_return(s);
1382}
1383
1384static struct trace_event_functions trace_bputs_funcs = {
1385 .trace = trace_bputs_print,
1386 .raw = trace_bputs_raw,
1387};
1388
1389static struct trace_event trace_bputs_event = {
1390 .type = TRACE_BPUTS,
1391 .funcs = &trace_bputs_funcs,
1392};
1393
1394/* TRACE_BPRINT */
1395static enum print_line_t
1396trace_bprint_print(struct trace_iterator *iter, int flags,
1397 struct trace_event *event)
1398{
1399 struct trace_entry *entry = iter->ent;
1400 struct trace_seq *s = &iter->seq;
1401 struct bprint_entry *field;
1402
1403 trace_assign_type(field, entry);
1404
1405 seq_print_ip_sym(s, field->ip, flags);
1406 trace_seq_puts(s, ": ");
1407 trace_seq_bprintf(s, field->fmt, field->buf);
1408
1409 return trace_handle_return(s);
1410}
1411
1412
1413static enum print_line_t
1414trace_bprint_raw(struct trace_iterator *iter, int flags,
1415 struct trace_event *event)
1416{
1417 struct bprint_entry *field;
1418 struct trace_seq *s = &iter->seq;
1419
1420 trace_assign_type(field, iter->ent);
1421
1422 trace_seq_printf(s, ": %lx : ", field->ip);
1423 trace_seq_bprintf(s, field->fmt, field->buf);
1424
1425 return trace_handle_return(s);
1426}
1427
1428static struct trace_event_functions trace_bprint_funcs = {
1429 .trace = trace_bprint_print,
1430 .raw = trace_bprint_raw,
1431};
1432
1433static struct trace_event trace_bprint_event = {
1434 .type = TRACE_BPRINT,
1435 .funcs = &trace_bprint_funcs,
1436};
1437
1438/* TRACE_PRINT */
1439static enum print_line_t trace_print_print(struct trace_iterator *iter,
1440 int flags, struct trace_event *event)
1441{
1442 struct print_entry *field;
1443 struct trace_seq *s = &iter->seq;
1444
1445 trace_assign_type(field, iter->ent);
1446
1447 seq_print_ip_sym(s, field->ip, flags);
1448 trace_seq_printf(s, ": %s", field->buf);
1449
1450 return trace_handle_return(s);
1451}
1452
1453static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags,
1454 struct trace_event *event)
1455{
1456 struct print_entry *field;
1457
1458 trace_assign_type(field, iter->ent);
1459
1460 trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf);
1461
1462 return trace_handle_return(&iter->seq);
1463}
1464
1465static struct trace_event_functions trace_print_funcs = {
1466 .trace = trace_print_print,
1467 .raw = trace_print_raw,
1468};
1469
1470static struct trace_event trace_print_event = {
1471 .type = TRACE_PRINT,
1472 .funcs = &trace_print_funcs,
1473};
1474
1475static enum print_line_t trace_raw_data(struct trace_iterator *iter, int flags,
1476 struct trace_event *event)
1477{
1478 struct raw_data_entry *field;
1479 int i;
1480
1481 trace_assign_type(field, iter->ent);
1482
1483 trace_seq_printf(&iter->seq, "# %x buf:", field->id);
1484
1485 for (i = 0; i < iter->ent_size - offsetof(struct raw_data_entry, buf); i++)
1486 trace_seq_printf(&iter->seq, " %02x",
1487 (unsigned char)field->buf[i]);
1488
1489 trace_seq_putc(&iter->seq, '\n');
1490
1491 return trace_handle_return(&iter->seq);
1492}
1493
1494static struct trace_event_functions trace_raw_data_funcs = {
1495 .trace = trace_raw_data,
1496 .raw = trace_raw_data,
1497};
1498
1499static struct trace_event trace_raw_data_event = {
1500 .type = TRACE_RAW_DATA,
1501 .funcs = &trace_raw_data_funcs,
1502};
1503
1504static enum print_line_t
1505trace_func_repeats_raw(struct trace_iterator *iter, int flags,
1506 struct trace_event *event)
1507{
1508 struct func_repeats_entry *field;
1509 struct trace_seq *s = &iter->seq;
1510
1511 trace_assign_type(field, iter->ent);
1512
1513 trace_seq_printf(s, "%lu %lu %u %llu\n",
1514 field->ip,
1515 field->parent_ip,
1516 field->count,
1517 FUNC_REPEATS_GET_DELTA_TS(field));
1518
1519 return trace_handle_return(s);
1520}
1521
1522static enum print_line_t
1523trace_func_repeats_print(struct trace_iterator *iter, int flags,
1524 struct trace_event *event)
1525{
1526 struct func_repeats_entry *field;
1527 struct trace_seq *s = &iter->seq;
1528
1529 trace_assign_type(field, iter->ent);
1530
1531 print_fn_trace(s, field->ip, field->parent_ip, flags);
1532 trace_seq_printf(s, " (repeats: %u, last_ts:", field->count);
1533 trace_print_time(s, iter,
1534 iter->ts - FUNC_REPEATS_GET_DELTA_TS(field));
1535 trace_seq_puts(s, ")\n");
1536
1537 return trace_handle_return(s);
1538}
1539
1540static struct trace_event_functions trace_func_repeats_funcs = {
1541 .trace = trace_func_repeats_print,
1542 .raw = trace_func_repeats_raw,
1543};
1544
1545static struct trace_event trace_func_repeats_event = {
1546 .type = TRACE_FUNC_REPEATS,
1547 .funcs = &trace_func_repeats_funcs,
1548};
1549
1550static struct trace_event *events[] __initdata = {
1551 &trace_fn_event,
1552 &trace_ctx_event,
1553 &trace_wake_event,
1554 &trace_stack_event,
1555 &trace_user_stack_event,
1556 &trace_bputs_event,
1557 &trace_bprint_event,
1558 &trace_print_event,
1559 &trace_hwlat_event,
1560 &trace_osnoise_event,
1561 &trace_timerlat_event,
1562 &trace_raw_data_event,
1563 &trace_func_repeats_event,
1564 NULL
1565};
1566
1567__init static int init_events(void)
1568{
1569 struct trace_event *event;
1570 int i, ret;
1571
1572 for (i = 0; events[i]; i++) {
1573 event = events[i];
1574
1575 ret = register_trace_event(event);
1576 if (!ret) {
1577 printk(KERN_WARNING "event %d failed to register\n",
1578 event->type);
1579 WARN_ON_ONCE(1);
1580 }
1581 }
1582
1583 return 0;
1584}
1585early_initcall(init_events);