?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
drm/connector: hdmi: Fix memory leak in drm_display_mode_from_cea_vic()
[drm/drm-misc.git] / kernel / trace / trace_output.c
blob868f2f912f2809e9ec63537e4da878958bef1b99
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
21 DECLARE_RWSEM(trace_event_sem);
22
23 static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly;
24
25 enum 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
38 enum 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
51 enum 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
64 const char *
65 trace_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 }
100 EXPORT_SYMBOL(trace_print_flags_seq);
101
102 const char *
103 trace_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 }
125 EXPORT_SYMBOL(trace_print_symbols_seq);
126
127 #if BITS_PER_LONG == 32
128 const char *
129 trace_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 }
164 EXPORT_SYMBOL(trace_print_flags_seq_u64);
165
166 const char *
167 trace_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 }
189 EXPORT_SYMBOL(trace_print_symbols_seq_u64);
190 #endif
191
192 const char *
193 trace_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 }
203 EXPORT_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 */
216 const char *
217 trace_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 }
233 EXPORT_SYMBOL(trace_print_hex_seq);
234
235 const char *
236 trace_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 }
278 EXPORT_SYMBOL(trace_print_array_seq);
279
280 const char *
281 trace_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 }
293 EXPORT_SYMBOL(trace_print_hex_dump_seq);
294
295 int 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 }
316 EXPORT_SYMBOL(trace_raw_output_prep);
317
318 void trace_event_printf(struct trace_iterator *iter, const char *fmt, ...)
319 {
320 va_list ap;
321
322 va_start(ap, fmt);
323 trace_check_vprintf(iter, trace_event_format(iter, fmt), ap);
324 va_end(ap);
325 }
326 EXPORT_SYMBOL(trace_event_printf);
327
328 static __printf(3, 0)
329 int trace_output_raw(struct trace_iterator *iter, char *name,
330 char *fmt, va_list ap)
331 {
332 struct trace_seq *s = &iter->seq;
333
334 trace_seq_printf(s, "%s: ", name);
335 trace_seq_vprintf(s, trace_event_format(iter, fmt), ap);
336
337 return trace_handle_return(s);
338 }
339
340 int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...)
341 {
342 va_list ap;
343 int ret;
344
345 va_start(ap, fmt);
346 ret = trace_output_raw(iter, name, fmt, ap);
347 va_end(ap);
348
349 return ret;
350 }
351 EXPORT_SYMBOL_GPL(trace_output_call);
352
353 static inline const char *kretprobed(const char *name, unsigned long addr)
354 {
355 if (is_kretprobe_trampoline(addr))
356 return "[unknown/kretprobe'd]";
357 return name;
358 }
359
360 void
361 trace_seq_print_sym(struct trace_seq *s, unsigned long address, bool offset)
362 {
363 #ifdef CONFIG_KALLSYMS
364 char str[KSYM_SYMBOL_LEN];
365 const char *name;
366
367 if (offset)
368 sprint_symbol(str, address);
369 else
370 kallsyms_lookup(address, NULL, NULL, NULL, str);
371 name = kretprobed(str, address);
372
373 if (name && strlen(name)) {
374 trace_seq_puts(s, name);
375 return;
376 }
377 #endif
378 trace_seq_printf(s, "0x%08lx", address);
379 }
380
381 #ifndef CONFIG_64BIT
382 # define IP_FMT "%08lx"
383 #else
384 # define IP_FMT "%016lx"
385 #endif
386
387 static int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
388 unsigned long ip, unsigned long sym_flags)
389 {
390 struct file *file = NULL;
391 unsigned long vmstart = 0;
392 int ret = 1;
393
394 if (s->full)
395 return 0;
396
397 if (mm) {
398 const struct vm_area_struct *vma;
399
400 mmap_read_lock(mm);
401 vma = find_vma(mm, ip);
402 if (vma) {
403 file = vma->vm_file;
404 vmstart = vma->vm_start;
405 }
406 if (file) {
407 ret = trace_seq_path(s, file_user_path(file));
408 if (ret)
409 trace_seq_printf(s, "[+0x%lx]",
410 ip - vmstart);
411 }
412 mmap_read_unlock(mm);
413 }
414 if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file))
415 trace_seq_printf(s, " <" IP_FMT ">", ip);
416 return !trace_seq_has_overflowed(s);
417 }
418
419 int
420 seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
421 {
422 if (!ip) {
423 trace_seq_putc(s, '0');
424 goto out;
425 }
426
427 trace_seq_print_sym(s, ip, sym_flags & TRACE_ITER_SYM_OFFSET);
428
429 if (sym_flags & TRACE_ITER_SYM_ADDR)
430 trace_seq_printf(s, " <" IP_FMT ">", ip);
431
432 out:
433 return !trace_seq_has_overflowed(s);
434 }
435
436 /**
437 * trace_print_lat_fmt - print the irq, preempt and lockdep fields
438 * @s: trace seq struct to write to
439 * @entry: The trace entry field from the ring buffer
440 *
441 * Prints the generic fields of irqs off, in hard or softirq, preempt
442 * count.
443 */
444 int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
445 {
446 char hardsoft_irq;
447 char need_resched;
448 char irqs_off;
449 int hardirq;
450 int softirq;
451 int bh_off;
452 int nmi;
453
454 nmi = entry->flags & TRACE_FLAG_NMI;
455 hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
456 softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
457 bh_off = entry->flags & TRACE_FLAG_BH_OFF;
458
459 irqs_off =
460 (entry->flags & TRACE_FLAG_IRQS_OFF && bh_off) ? 'D' :
461 (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
462 bh_off ? 'b' :
463 (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' :
464 '.';
465
466 switch (entry->flags & (TRACE_FLAG_NEED_RESCHED |
467 TRACE_FLAG_PREEMPT_RESCHED)) {
468 case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED:
469 need_resched = 'N';
470 break;
471 case TRACE_FLAG_NEED_RESCHED:
472 need_resched = 'n';
473 break;
474 case TRACE_FLAG_PREEMPT_RESCHED:
475 need_resched = 'p';
476 break;
477 default:
478 need_resched = '.';
479 break;
480 }
481
482 hardsoft_irq =
483 (nmi && hardirq) ? 'Z' :
484 nmi ? 'z' :
485 (hardirq && softirq) ? 'H' :
486 hardirq ? 'h' :
487 softirq ? 's' :
488 '.' ;
489
490 trace_seq_printf(s, "%c%c%c",
491 irqs_off, need_resched, hardsoft_irq);
492
493 if (entry->preempt_count & 0xf)
494 trace_seq_printf(s, "%x", entry->preempt_count & 0xf);
495 else
496 trace_seq_putc(s, '.');
497
498 if (entry->preempt_count & 0xf0)
499 trace_seq_printf(s, "%x", entry->preempt_count >> 4);
500 else
501 trace_seq_putc(s, '.');
502
503 return !trace_seq_has_overflowed(s);
504 }
505
506 static int
507 lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
508 {
509 char comm[TASK_COMM_LEN];
510
511 trace_find_cmdline(entry->pid, comm);
512
513 trace_seq_printf(s, "%8.8s-%-7d %3d",
514 comm, entry->pid, cpu);
515
516 return trace_print_lat_fmt(s, entry);
517 }
518
519 #undef MARK
520 #define MARK(v, s) {.val = v, .sym = s}
521 /* trace overhead mark */
522 static const struct trace_mark {
523 unsigned long long val; /* unit: nsec */
524 char sym;
525 } mark[] = {
526 MARK(1000000000ULL , '$'), /* 1 sec */
527 MARK(100000000ULL , '@'), /* 100 msec */
528 MARK(10000000ULL , '*'), /* 10 msec */
529 MARK(1000000ULL , '#'), /* 1000 usecs */
530 MARK(100000ULL , '!'), /* 100 usecs */
531 MARK(10000ULL , '+'), /* 10 usecs */
532 };
533 #undef MARK
534
535 char trace_find_mark(unsigned long long d)
536 {
537 int i;
538 int size = ARRAY_SIZE(mark);
539
540 for (i = 0; i < size; i++) {
541 if (d > mark[i].val)
542 break;
543 }
544
545 return (i == size) ? ' ' : mark[i].sym;
546 }
547
548 static int
549 lat_print_timestamp(struct trace_iterator *iter, u64 next_ts)
550 {
551 struct trace_array *tr = iter->tr;
552 unsigned long verbose = tr->trace_flags & TRACE_ITER_VERBOSE;
553 unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS;
554 unsigned long long abs_ts = iter->ts - iter->array_buffer->time_start;
555 unsigned long long rel_ts = next_ts - iter->ts;
556 struct trace_seq *s = &iter->seq;
557
558 if (in_ns) {
559 abs_ts = ns2usecs(abs_ts);
560 rel_ts = ns2usecs(rel_ts);
561 }
562
563 if (verbose && in_ns) {
564 unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC);
565 unsigned long abs_msec = (unsigned long)abs_ts;
566 unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC);
567 unsigned long rel_msec = (unsigned long)rel_ts;
568
569 trace_seq_printf(
570 s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ",
571 ns2usecs(iter->ts),
572 abs_msec, abs_usec,
573 rel_msec, rel_usec);
574
575 } else if (verbose && !in_ns) {
576 trace_seq_printf(
577 s, "[%016llx] %lld (+%lld): ",
578 iter->ts, abs_ts, rel_ts);
579
580 } else if (!verbose && in_ns) {
581 trace_seq_printf(
582 s, " %4lldus%c: ",
583 abs_ts,
584 trace_find_mark(rel_ts * NSEC_PER_USEC));
585
586 } else { /* !verbose && !in_ns */
587 trace_seq_printf(s, " %4lld: ", abs_ts);
588 }
589
590 return !trace_seq_has_overflowed(s);
591 }
592
593 static void trace_print_time(struct trace_seq *s, struct trace_iterator *iter,
594 unsigned long long ts)
595 {
596 unsigned long secs, usec_rem;
597 unsigned long long t;
598
599 if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) {
600 t = ns2usecs(ts);
601 usec_rem = do_div(t, USEC_PER_SEC);
602 secs = (unsigned long)t;
603 trace_seq_printf(s, " %5lu.%06lu", secs, usec_rem);
604 } else
605 trace_seq_printf(s, " %12llu", ts);
606 }
607
608 int trace_print_context(struct trace_iterator *iter)
609 {
610 struct trace_array *tr = iter->tr;
611 struct trace_seq *s = &iter->seq;
612 struct trace_entry *entry = iter->ent;
613 char comm[TASK_COMM_LEN];
614
615 trace_find_cmdline(entry->pid, comm);
616
617 trace_seq_printf(s, "%16s-%-7d ", comm, entry->pid);
618
619 if (tr->trace_flags & TRACE_ITER_RECORD_TGID) {
620 unsigned int tgid = trace_find_tgid(entry->pid);
621
622 if (!tgid)
623 trace_seq_printf(s, "(-------) ");
624 else
625 trace_seq_printf(s, "(%7d) ", tgid);
626 }
627
628 trace_seq_printf(s, "[%03d] ", iter->cpu);
629
630 if (tr->trace_flags & TRACE_ITER_IRQ_INFO)
631 trace_print_lat_fmt(s, entry);
632
633 trace_print_time(s, iter, iter->ts);
634 trace_seq_puts(s, ": ");
635
636 return !trace_seq_has_overflowed(s);
637 }
638
639 int trace_print_lat_context(struct trace_iterator *iter)
640 {
641 struct trace_entry *entry, *next_entry;
642 struct trace_array *tr = iter->tr;
643 struct trace_seq *s = &iter->seq;
644 unsigned long verbose = (tr->trace_flags & TRACE_ITER_VERBOSE);
645 u64 next_ts;
646
647 next_entry = trace_find_next_entry(iter, NULL, &next_ts);
648 if (!next_entry)
649 next_ts = iter->ts;
650
651 /* trace_find_next_entry() may change iter->ent */
652 entry = iter->ent;
653
654 if (verbose) {
655 char comm[TASK_COMM_LEN];
656
657 trace_find_cmdline(entry->pid, comm);
658
659 trace_seq_printf(
660 s, "%16s %7d %3d %d %08x %08lx ",
661 comm, entry->pid, iter->cpu, entry->flags,
662 entry->preempt_count & 0xf, iter->idx);
663 } else {
664 lat_print_generic(s, entry, iter->cpu);
665 }
666
667 lat_print_timestamp(iter, next_ts);
668
669 return !trace_seq_has_overflowed(s);
670 }
671
672 /**
673 * ftrace_find_event - find a registered event
674 * @type: the type of event to look for
675 *
676 * Returns an event of type @type otherwise NULL
677 * Called with trace_event_read_lock() held.
678 */
679 struct trace_event *ftrace_find_event(int type)
680 {
681 struct trace_event *event;
682 unsigned key;
683
684 key = type & (EVENT_HASHSIZE - 1);
685
686 hlist_for_each_entry(event, &event_hash[key], node) {
687 if (event->type == type)
688 return event;
689 }
690
691 return NULL;
692 }
693
694 static DEFINE_IDA(trace_event_ida);
695
696 static void free_trace_event_type(int type)
697 {
698 if (type >= __TRACE_LAST_TYPE)
699 ida_free(&trace_event_ida, type);
700 }
701
702 static int alloc_trace_event_type(void)
703 {
704 int next;
705
706 /* Skip static defined type numbers */
707 next = ida_alloc_range(&trace_event_ida, __TRACE_LAST_TYPE,
708 TRACE_EVENT_TYPE_MAX, GFP_KERNEL);
709 if (next < 0)
710 return 0;
711 return next;
712 }
713
714 void trace_event_read_lock(void)
715 {
716 down_read(&trace_event_sem);
717 }
718
719 void trace_event_read_unlock(void)
720 {
721 up_read(&trace_event_sem);
722 }
723
724 /**
725 * register_trace_event - register output for an event type
726 * @event: the event type to register
727 *
728 * Event types are stored in a hash and this hash is used to
729 * find a way to print an event. If the @event->type is set
730 * then it will use that type, otherwise it will assign a
731 * type to use.
732 *
733 * If you assign your own type, please make sure it is added
734 * to the trace_type enum in trace.h, to avoid collisions
735 * with the dynamic types.
736 *
737 * Returns the event type number or zero on error.
738 */
739 int register_trace_event(struct trace_event *event)
740 {
741 unsigned key;
742 int ret = 0;
743
744 down_write(&trace_event_sem);
745
746 if (WARN_ON(!event))
747 goto out;
748
749 if (WARN_ON(!event->funcs))
750 goto out;
751
752 if (!event->type) {
753 event->type = alloc_trace_event_type();
754 if (!event->type)
755 goto out;
756 } else if (WARN(event->type > __TRACE_LAST_TYPE,
757 "Need to add type to trace.h")) {
758 goto out;
759 } else {
760 /* Is this event already used */
761 if (ftrace_find_event(event->type))
762 goto out;
763 }
764
765 if (event->funcs->trace == NULL)
766 event->funcs->trace = trace_nop_print;
767 if (event->funcs->raw == NULL)
768 event->funcs->raw = trace_nop_print;
769 if (event->funcs->hex == NULL)
770 event->funcs->hex = trace_nop_print;
771 if (event->funcs->binary == NULL)
772 event->funcs->binary = trace_nop_print;
773
774 key = event->type & (EVENT_HASHSIZE - 1);
775
776 hlist_add_head(&event->node, &event_hash[key]);
777
778 ret = event->type;
779 out:
780 up_write(&trace_event_sem);
781
782 return ret;
783 }
784 EXPORT_SYMBOL_GPL(register_trace_event);
785
786 /*
787 * Used by module code with the trace_event_sem held for write.
788 */
789 int __unregister_trace_event(struct trace_event *event)
790 {
791 hlist_del(&event->node);
792 free_trace_event_type(event->type);
793 return 0;
794 }
795
796 /**
797 * unregister_trace_event - remove a no longer used event
798 * @event: the event to remove
799 */
800 int unregister_trace_event(struct trace_event *event)
801 {
802 down_write(&trace_event_sem);
803 __unregister_trace_event(event);
804 up_write(&trace_event_sem);
805
806 return 0;
807 }
808 EXPORT_SYMBOL_GPL(unregister_trace_event);
809
810 /*
811 * Standard events
812 */
813
814 static void print_array(struct trace_iterator *iter, void *pos,
815 struct ftrace_event_field *field)
816 {
817 int offset;
818 int len;
819 int i;
820
821 offset = *(int *)pos & 0xffff;
822 len = *(int *)pos >> 16;
823
824 if (field)
825 offset += field->offset + sizeof(int);
826
827 if (offset + len > iter->ent_size) {
828 trace_seq_puts(&iter->seq, "<OVERFLOW>");
829 return;
830 }
831
832 pos = (void *)iter->ent + offset;
833
834 for (i = 0; i < len; i++, pos++) {
835 if (i)
836 trace_seq_putc(&iter->seq, ',');
837 trace_seq_printf(&iter->seq, "%02x", *(unsigned char *)pos);
838 }
839 }
840
841 static void print_fields(struct trace_iterator *iter, struct trace_event_call *call,
842 struct list_head *head)
843 {
844 struct ftrace_event_field *field;
845 int offset;
846 int len;
847 int ret;
848 void *pos;
849
850 list_for_each_entry_reverse(field, head, link) {
851 trace_seq_printf(&iter->seq, " %s=", field->name);
852 if (field->offset + field->size > iter->ent_size) {
853 trace_seq_puts(&iter->seq, "<OVERFLOW>");
854 continue;
855 }
856 pos = (void *)iter->ent + field->offset;
857
858 switch (field->filter_type) {
859 case FILTER_COMM:
860 case FILTER_STATIC_STRING:
861 trace_seq_printf(&iter->seq, "%.*s", field->size, (char *)pos);
862 break;
863 case FILTER_RDYN_STRING:
864 case FILTER_DYN_STRING:
865 offset = *(int *)pos & 0xffff;
866 len = *(int *)pos >> 16;
867
868 if (field->filter_type == FILTER_RDYN_STRING)
869 offset += field->offset + sizeof(int);
870
871 if (offset + len > iter->ent_size) {
872 trace_seq_puts(&iter->seq, "<OVERFLOW>");
873 break;
874 }
875 pos = (void *)iter->ent + offset;
876 trace_seq_printf(&iter->seq, "%.*s", len, (char *)pos);
877 break;
878 case FILTER_PTR_STRING:
879 if (!iter->fmt_size)
880 trace_iter_expand_format(iter);
881 pos = *(void **)pos;
882 ret = strncpy_from_kernel_nofault(iter->fmt, pos,
883 iter->fmt_size);
884 if (ret < 0)
885 trace_seq_printf(&iter->seq, "(0x%px)", pos);
886 else
887 trace_seq_printf(&iter->seq, "(0x%px:%s)",
888 pos, iter->fmt);
889 break;
890 case FILTER_TRACE_FN:
891 pos = *(void **)pos;
892 trace_seq_printf(&iter->seq, "%pS", pos);
893 break;
894 case FILTER_CPU:
895 case FILTER_OTHER:
896 switch (field->size) {
897 case 1:
898 if (isprint(*(char *)pos)) {
899 trace_seq_printf(&iter->seq, "'%c'",
900 *(unsigned char *)pos);
901 }
902 trace_seq_printf(&iter->seq, "(%d)",
903 *(unsigned char *)pos);
904 break;
905 case 2:
906 trace_seq_printf(&iter->seq, "0x%x (%d)",
907 *(unsigned short *)pos,
908 *(unsigned short *)pos);
909 break;
910 case 4:
911 /* dynamic array info is 4 bytes */
912 if (strstr(field->type, "__data_loc")) {
913 print_array(iter, pos, NULL);
914 break;
915 }
916
917 if (strstr(field->type, "__rel_loc")) {
918 print_array(iter, pos, field);
919 break;
920 }
921
922 trace_seq_printf(&iter->seq, "0x%x (%d)",
923 *(unsigned int *)pos,
924 *(unsigned int *)pos);
925 break;
926 case 8:
927 trace_seq_printf(&iter->seq, "0x%llx (%lld)",
928 *(unsigned long long *)pos,
929 *(unsigned long long *)pos);
930 break;
931 default:
932 trace_seq_puts(&iter->seq, "<INVALID-SIZE>");
933 break;
934 }
935 break;
936 default:
937 trace_seq_puts(&iter->seq, "<INVALID-TYPE>");
938 }
939 }
940 trace_seq_putc(&iter->seq, '\n');
941 }
942
943 enum print_line_t print_event_fields(struct trace_iterator *iter,
944 struct trace_event *event)
945 {
946 struct trace_event_call *call;
947 struct list_head *head;
948
949 /* ftrace defined events have separate call structures */
950 if (event->type <= __TRACE_LAST_TYPE) {
951 bool found = false;
952
953 down_read(&trace_event_sem);
954 list_for_each_entry(call, &ftrace_events, list) {
955 if (call->event.type == event->type) {
956 found = true;
957 break;
958 }
959 /* No need to search all events */
960 if (call->event.type > __TRACE_LAST_TYPE)
961 break;
962 }
963 up_read(&trace_event_sem);
964 if (!found) {
965 trace_seq_printf(&iter->seq, "UNKNOWN TYPE %d\n", event->type);
966 goto out;
967 }
968 } else {
969 call = container_of(event, struct trace_event_call, event);
970 }
971 head = trace_get_fields(call);
972
973 trace_seq_printf(&iter->seq, "%s:", trace_event_name(call));
974
975 if (head && !list_empty(head))
976 print_fields(iter, call, head);
977 else
978 trace_seq_puts(&iter->seq, "No fields found\n");
979
980 out:
981 return trace_handle_return(&iter->seq);
982 }
983
984 enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags,
985 struct trace_event *event)
986 {
987 trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type);
988
989 return trace_handle_return(&iter->seq);
990 }
991
992 static void print_fn_trace(struct trace_seq *s, unsigned long ip,
993 unsigned long parent_ip, long delta, int flags)
994 {
995 ip += delta;
996 parent_ip += delta;
997
998 seq_print_ip_sym(s, ip, flags);
999
1000 if ((flags & TRACE_ITER_PRINT_PARENT) && parent_ip) {
1001 trace_seq_puts(s, " <-");
1002 seq_print_ip_sym(s, parent_ip, flags);
1003 }
1004 }
1005
1006 /* TRACE_FN */
1007 static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags,
1008 struct trace_event *event)
1009 {
1010 struct ftrace_entry *field;
1011 struct trace_seq *s = &iter->seq;
1012
1013 trace_assign_type(field, iter->ent);
1014
1015 print_fn_trace(s, field->ip, field->parent_ip, iter->tr->text_delta, flags);
1016 trace_seq_putc(s, '\n');
1017
1018 return trace_handle_return(s);
1019 }
1020
1021 static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags,
1022 struct trace_event *event)
1023 {
1024 struct ftrace_entry *field;
1025
1026 trace_assign_type(field, iter->ent);
1027
1028 trace_seq_printf(&iter->seq, "%lx %lx\n",
1029 field->ip,
1030 field->parent_ip);
1031
1032 return trace_handle_return(&iter->seq);
1033 }
1034
1035 static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags,
1036 struct trace_event *event)
1037 {
1038 struct ftrace_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->ip);
1044 SEQ_PUT_HEX_FIELD(s, field->parent_ip);
1045
1046 return trace_handle_return(s);
1047 }
1048
1049 static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags,
1050 struct trace_event *event)
1051 {
1052 struct ftrace_entry *field;
1053 struct trace_seq *s = &iter->seq;
1054
1055 trace_assign_type(field, iter->ent);
1056
1057 SEQ_PUT_FIELD(s, field->ip);
1058 SEQ_PUT_FIELD(s, field->parent_ip);
1059
1060 return trace_handle_return(s);
1061 }
1062
1063 static struct trace_event_functions trace_fn_funcs = {
1064 .trace = trace_fn_trace,
1065 .raw = trace_fn_raw,
1066 .hex = trace_fn_hex,
1067 .binary = trace_fn_bin,
1068 };
1069
1070 static struct trace_event trace_fn_event = {
1071 .type = TRACE_FN,
1072 .funcs = &trace_fn_funcs,
1073 };
1074
1075 /* TRACE_CTX an TRACE_WAKE */
1076 static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
1077 char *delim)
1078 {
1079 struct ctx_switch_entry *field;
1080 char comm[TASK_COMM_LEN];
1081 int S, T;
1082
1083
1084 trace_assign_type(field, iter->ent);
1085
1086 T = task_index_to_char(field->next_state);
1087 S = task_index_to_char(field->prev_state);
1088 trace_find_cmdline(field->next_pid, comm);
1089 trace_seq_printf(&iter->seq,
1090 " %7d:%3d:%c %s [%03d] %7d:%3d:%c %s\n",
1091 field->prev_pid,
1092 field->prev_prio,
1093 S, delim,
1094 field->next_cpu,
1095 field->next_pid,
1096 field->next_prio,
1097 T, comm);
1098
1099 return trace_handle_return(&iter->seq);
1100 }
1101
1102 static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags,
1103 struct trace_event *event)
1104 {
1105 return trace_ctxwake_print(iter, "==>");
1106 }
1107
1108 static enum print_line_t trace_wake_print(struct trace_iterator *iter,
1109 int flags, struct trace_event *event)
1110 {
1111 return trace_ctxwake_print(iter, " +");
1112 }
1113
1114 static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
1115 {
1116 struct ctx_switch_entry *field;
1117 int T;
1118
1119 trace_assign_type(field, iter->ent);
1120
1121 if (!S)
1122 S = task_index_to_char(field->prev_state);
1123 T = task_index_to_char(field->next_state);
1124 trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n",
1125 field->prev_pid,
1126 field->prev_prio,
1127 S,
1128 field->next_cpu,
1129 field->next_pid,
1130 field->next_prio,
1131 T);
1132
1133 return trace_handle_return(&iter->seq);
1134 }
1135
1136 static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags,
1137 struct trace_event *event)
1138 {
1139 return trace_ctxwake_raw(iter, 0);
1140 }
1141
1142 static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags,
1143 struct trace_event *event)
1144 {
1145 return trace_ctxwake_raw(iter, '+');
1146 }
1147
1148
1149 static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
1150 {
1151 struct ctx_switch_entry *field;
1152 struct trace_seq *s = &iter->seq;
1153 int T;
1154
1155 trace_assign_type(field, iter->ent);
1156
1157 if (!S)
1158 S = task_index_to_char(field->prev_state);
1159 T = task_index_to_char(field->next_state);
1160
1161 SEQ_PUT_HEX_FIELD(s, field->prev_pid);
1162 SEQ_PUT_HEX_FIELD(s, field->prev_prio);
1163 SEQ_PUT_HEX_FIELD(s, S);
1164 SEQ_PUT_HEX_FIELD(s, field->next_cpu);
1165 SEQ_PUT_HEX_FIELD(s, field->next_pid);
1166 SEQ_PUT_HEX_FIELD(s, field->next_prio);
1167 SEQ_PUT_HEX_FIELD(s, T);
1168
1169 return trace_handle_return(s);
1170 }
1171
1172 static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags,
1173 struct trace_event *event)
1174 {
1175 return trace_ctxwake_hex(iter, 0);
1176 }
1177
1178 static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags,
1179 struct trace_event *event)
1180 {
1181 return trace_ctxwake_hex(iter, '+');
1182 }
1183
1184 static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
1185 int flags, struct trace_event *event)
1186 {
1187 struct ctx_switch_entry *field;
1188 struct trace_seq *s = &iter->seq;
1189
1190 trace_assign_type(field, iter->ent);
1191
1192 SEQ_PUT_FIELD(s, field->prev_pid);
1193 SEQ_PUT_FIELD(s, field->prev_prio);
1194 SEQ_PUT_FIELD(s, field->prev_state);
1195 SEQ_PUT_FIELD(s, field->next_cpu);
1196 SEQ_PUT_FIELD(s, field->next_pid);
1197 SEQ_PUT_FIELD(s, field->next_prio);
1198 SEQ_PUT_FIELD(s, field->next_state);
1199
1200 return trace_handle_return(s);
1201 }
1202
1203 static struct trace_event_functions trace_ctx_funcs = {
1204 .trace = trace_ctx_print,
1205 .raw = trace_ctx_raw,
1206 .hex = trace_ctx_hex,
1207 .binary = trace_ctxwake_bin,
1208 };
1209
1210 static struct trace_event trace_ctx_event = {
1211 .type = TRACE_CTX,
1212 .funcs = &trace_ctx_funcs,
1213 };
1214
1215 static struct trace_event_functions trace_wake_funcs = {
1216 .trace = trace_wake_print,
1217 .raw = trace_wake_raw,
1218 .hex = trace_wake_hex,
1219 .binary = trace_ctxwake_bin,
1220 };
1221
1222 static struct trace_event trace_wake_event = {
1223 .type = TRACE_WAKE,
1224 .funcs = &trace_wake_funcs,
1225 };
1226
1227 /* TRACE_STACK */
1228
1229 static enum print_line_t trace_stack_print(struct trace_iterator *iter,
1230 int flags, struct trace_event *event)
1231 {
1232 struct stack_entry *field;
1233 struct trace_seq *s = &iter->seq;
1234 unsigned long *p;
1235 unsigned long *end;
1236 long delta = iter->tr->text_delta;
1237
1238 trace_assign_type(field, iter->ent);
1239 end = (unsigned long *)((long)iter->ent + iter->ent_size);
1240
1241 trace_seq_puts(s, "<stack trace>\n");
1242
1243 for (p = field->caller; p && p < end && *p != ULONG_MAX; p++) {
1244
1245 if (trace_seq_has_overflowed(s))
1246 break;
1247
1248 trace_seq_puts(s, " => ");
1249 seq_print_ip_sym(s, (*p) + delta, flags);
1250 trace_seq_putc(s, '\n');
1251 }
1252
1253 return trace_handle_return(s);
1254 }
1255
1256 static struct trace_event_functions trace_stack_funcs = {
1257 .trace = trace_stack_print,
1258 };
1259
1260 static struct trace_event trace_stack_event = {
1261 .type = TRACE_STACK,
1262 .funcs = &trace_stack_funcs,
1263 };
1264
1265 /* TRACE_USER_STACK */
1266 static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
1267 int flags, struct trace_event *event)
1268 {
1269 struct trace_array *tr = iter->tr;
1270 struct userstack_entry *field;
1271 struct trace_seq *s = &iter->seq;
1272 struct mm_struct *mm = NULL;
1273 unsigned int i;
1274
1275 trace_assign_type(field, iter->ent);
1276
1277 trace_seq_puts(s, "<user stack trace>\n");
1278
1279 if (tr->trace_flags & TRACE_ITER_SYM_USEROBJ) {
1280 struct task_struct *task;
1281 /*
1282 * we do the lookup on the thread group leader,
1283 * since individual threads might have already quit!
1284 */
1285 rcu_read_lock();
1286 task = find_task_by_vpid(field->tgid);
1287 if (task)
1288 mm = get_task_mm(task);
1289 rcu_read_unlock();
1290 }
1291
1292 for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
1293 unsigned long ip = field->caller[i];
1294
1295 if (!ip || trace_seq_has_overflowed(s))
1296 break;
1297
1298 trace_seq_puts(s, " => ");
1299 seq_print_user_ip(s, mm, ip, flags);
1300 trace_seq_putc(s, '\n');
1301 }
1302
1303 if (mm)
1304 mmput(mm);
1305
1306 return trace_handle_return(s);
1307 }
1308
1309 static struct trace_event_functions trace_user_stack_funcs = {
1310 .trace = trace_user_stack_print,
1311 };
1312
1313 static struct trace_event trace_user_stack_event = {
1314 .type = TRACE_USER_STACK,
1315 .funcs = &trace_user_stack_funcs,
1316 };
1317
1318 /* TRACE_HWLAT */
1319 static enum print_line_t
1320 trace_hwlat_print(struct trace_iterator *iter, int flags,
1321 struct trace_event *event)
1322 {
1323 struct trace_entry *entry = iter->ent;
1324 struct trace_seq *s = &iter->seq;
1325 struct hwlat_entry *field;
1326
1327 trace_assign_type(field, entry);
1328
1329 trace_seq_printf(s, "#%-5u inner/outer(us): %4llu/%-5llu ts:%lld.%09ld count:%d",
1330 field->seqnum,
1331 field->duration,
1332 field->outer_duration,
1333 (long long)field->timestamp.tv_sec,
1334 field->timestamp.tv_nsec, field->count);
1335
1336 if (field->nmi_count) {
1337 /*
1338 * The generic sched_clock() is not NMI safe, thus
1339 * we only record the count and not the time.
1340 */
1341 if (!IS_ENABLED(CONFIG_GENERIC_SCHED_CLOCK))
1342 trace_seq_printf(s, " nmi-total:%llu",
1343 field->nmi_total_ts);
1344 trace_seq_printf(s, " nmi-count:%u",
1345 field->nmi_count);
1346 }
1347
1348 trace_seq_putc(s, '\n');
1349
1350 return trace_handle_return(s);
1351 }
1352
1353 static enum print_line_t
1354 trace_hwlat_raw(struct trace_iterator *iter, int flags,
1355 struct trace_event *event)
1356 {
1357 struct hwlat_entry *field;
1358 struct trace_seq *s = &iter->seq;
1359
1360 trace_assign_type(field, iter->ent);
1361
1362 trace_seq_printf(s, "%llu %lld %lld %09ld %u\n",
1363 field->duration,
1364 field->outer_duration,
1365 (long long)field->timestamp.tv_sec,
1366 field->timestamp.tv_nsec,
1367 field->seqnum);
1368
1369 return trace_handle_return(s);
1370 }
1371
1372 static struct trace_event_functions trace_hwlat_funcs = {
1373 .trace = trace_hwlat_print,
1374 .raw = trace_hwlat_raw,
1375 };
1376
1377 static struct trace_event trace_hwlat_event = {
1378 .type = TRACE_HWLAT,
1379 .funcs = &trace_hwlat_funcs,
1380 };
1381
1382 /* TRACE_OSNOISE */
1383 static enum print_line_t
1384 trace_osnoise_print(struct trace_iterator *iter, int flags,
1385 struct trace_event *event)
1386 {
1387 struct trace_entry *entry = iter->ent;
1388 struct trace_seq *s = &iter->seq;
1389 struct osnoise_entry *field;
1390 u64 ratio, ratio_dec;
1391 u64 net_runtime;
1392
1393 trace_assign_type(field, entry);
1394
1395 /*
1396 * compute the available % of cpu time.
1397 */
1398 net_runtime = field->runtime - field->noise;
1399 ratio = net_runtime * 10000000;
1400 do_div(ratio, field->runtime);
1401 ratio_dec = do_div(ratio, 100000);
1402
1403 trace_seq_printf(s, "%llu %10llu %3llu.%05llu %7llu",
1404 field->runtime,
1405 field->noise,
1406 ratio, ratio_dec,
1407 field->max_sample);
1408
1409 trace_seq_printf(s, " %6u", field->hw_count);
1410 trace_seq_printf(s, " %6u", field->nmi_count);
1411 trace_seq_printf(s, " %6u", field->irq_count);
1412 trace_seq_printf(s, " %6u", field->softirq_count);
1413 trace_seq_printf(s, " %6u", field->thread_count);
1414
1415 trace_seq_putc(s, '\n');
1416
1417 return trace_handle_return(s);
1418 }
1419
1420 static enum print_line_t
1421 trace_osnoise_raw(struct trace_iterator *iter, int flags,
1422 struct trace_event *event)
1423 {
1424 struct osnoise_entry *field;
1425 struct trace_seq *s = &iter->seq;
1426
1427 trace_assign_type(field, iter->ent);
1428
1429 trace_seq_printf(s, "%lld %llu %llu %u %u %u %u %u\n",
1430 field->runtime,
1431 field->noise,
1432 field->max_sample,
1433 field->hw_count,
1434 field->nmi_count,
1435 field->irq_count,
1436 field->softirq_count,
1437 field->thread_count);
1438
1439 return trace_handle_return(s);
1440 }
1441
1442 static struct trace_event_functions trace_osnoise_funcs = {
1443 .trace = trace_osnoise_print,
1444 .raw = trace_osnoise_raw,
1445 };
1446
1447 static struct trace_event trace_osnoise_event = {
1448 .type = TRACE_OSNOISE,
1449 .funcs = &trace_osnoise_funcs,
1450 };
1451
1452 /* TRACE_TIMERLAT */
1453
1454 static char *timerlat_lat_context[] = {"irq", "thread", "user-ret"};
1455 static enum print_line_t
1456 trace_timerlat_print(struct trace_iterator *iter, int flags,
1457 struct trace_event *event)
1458 {
1459 struct trace_entry *entry = iter->ent;
1460 struct trace_seq *s = &iter->seq;
1461 struct timerlat_entry *field;
1462
1463 trace_assign_type(field, entry);
1464
1465 trace_seq_printf(s, "#%-5u context %6s timer_latency %9llu ns\n",
1466 field->seqnum,
1467 timerlat_lat_context[field->context],
1468 field->timer_latency);
1469
1470 return trace_handle_return(s);
1471 }
1472
1473 static enum print_line_t
1474 trace_timerlat_raw(struct trace_iterator *iter, int flags,
1475 struct trace_event *event)
1476 {
1477 struct timerlat_entry *field;
1478 struct trace_seq *s = &iter->seq;
1479
1480 trace_assign_type(field, iter->ent);
1481
1482 trace_seq_printf(s, "%u %d %llu\n",
1483 field->seqnum,
1484 field->context,
1485 field->timer_latency);
1486
1487 return trace_handle_return(s);
1488 }
1489
1490 static struct trace_event_functions trace_timerlat_funcs = {
1491 .trace = trace_timerlat_print,
1492 .raw = trace_timerlat_raw,
1493 };
1494
1495 static struct trace_event trace_timerlat_event = {
1496 .type = TRACE_TIMERLAT,
1497 .funcs = &trace_timerlat_funcs,
1498 };
1499
1500 /* TRACE_BPUTS */
1501 static enum print_line_t
1502 trace_bputs_print(struct trace_iterator *iter, int flags,
1503 struct trace_event *event)
1504 {
1505 struct trace_entry *entry = iter->ent;
1506 struct trace_seq *s = &iter->seq;
1507 struct bputs_entry *field;
1508
1509 trace_assign_type(field, entry);
1510
1511 seq_print_ip_sym(s, field->ip, flags);
1512 trace_seq_puts(s, ": ");
1513 trace_seq_puts(s, field->str);
1514
1515 return trace_handle_return(s);
1516 }
1517
1518
1519 static enum print_line_t
1520 trace_bputs_raw(struct trace_iterator *iter, int flags,
1521 struct trace_event *event)
1522 {
1523 struct bputs_entry *field;
1524 struct trace_seq *s = &iter->seq;
1525
1526 trace_assign_type(field, iter->ent);
1527
1528 trace_seq_printf(s, ": %lx : ", field->ip);
1529 trace_seq_puts(s, field->str);
1530
1531 return trace_handle_return(s);
1532 }
1533
1534 static struct trace_event_functions trace_bputs_funcs = {
1535 .trace = trace_bputs_print,
1536 .raw = trace_bputs_raw,
1537 };
1538
1539 static struct trace_event trace_bputs_event = {
1540 .type = TRACE_BPUTS,
1541 .funcs = &trace_bputs_funcs,
1542 };
1543
1544 /* TRACE_BPRINT */
1545 static enum print_line_t
1546 trace_bprint_print(struct trace_iterator *iter, int flags,
1547 struct trace_event *event)
1548 {
1549 struct trace_entry *entry = iter->ent;
1550 struct trace_seq *s = &iter->seq;
1551 struct bprint_entry *field;
1552
1553 trace_assign_type(field, entry);
1554
1555 seq_print_ip_sym(s, field->ip, flags);
1556 trace_seq_puts(s, ": ");
1557 trace_seq_bprintf(s, field->fmt, field->buf);
1558
1559 return trace_handle_return(s);
1560 }
1561
1562
1563 static enum print_line_t
1564 trace_bprint_raw(struct trace_iterator *iter, int flags,
1565 struct trace_event *event)
1566 {
1567 struct bprint_entry *field;
1568 struct trace_seq *s = &iter->seq;
1569
1570 trace_assign_type(field, iter->ent);
1571
1572 trace_seq_printf(s, ": %lx : ", field->ip);
1573 trace_seq_bprintf(s, field->fmt, field->buf);
1574
1575 return trace_handle_return(s);
1576 }
1577
1578 static struct trace_event_functions trace_bprint_funcs = {
1579 .trace = trace_bprint_print,
1580 .raw = trace_bprint_raw,
1581 };
1582
1583 static struct trace_event trace_bprint_event = {
1584 .type = TRACE_BPRINT,
1585 .funcs = &trace_bprint_funcs,
1586 };
1587
1588 /* TRACE_PRINT */
1589 static enum print_line_t trace_print_print(struct trace_iterator *iter,
1590 int flags, struct trace_event *event)
1591 {
1592 struct print_entry *field;
1593 struct trace_seq *s = &iter->seq;
1594 unsigned long ip;
1595
1596 trace_assign_type(field, iter->ent);
1597
1598 ip = field->ip + iter->tr->text_delta;
1599
1600 seq_print_ip_sym(s, ip, flags);
1601 trace_seq_printf(s, ": %s", field->buf);
1602
1603 return trace_handle_return(s);
1604 }
1605
1606 static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags,
1607 struct trace_event *event)
1608 {
1609 struct print_entry *field;
1610
1611 trace_assign_type(field, iter->ent);
1612
1613 trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf);
1614
1615 return trace_handle_return(&iter->seq);
1616 }
1617
1618 static struct trace_event_functions trace_print_funcs = {
1619 .trace = trace_print_print,
1620 .raw = trace_print_raw,
1621 };
1622
1623 static struct trace_event trace_print_event = {
1624 .type = TRACE_PRINT,
1625 .funcs = &trace_print_funcs,
1626 };
1627
1628 static enum print_line_t trace_raw_data(struct trace_iterator *iter, int flags,
1629 struct trace_event *event)
1630 {
1631 struct raw_data_entry *field;
1632 int i;
1633
1634 trace_assign_type(field, iter->ent);
1635
1636 trace_seq_printf(&iter->seq, "# %x buf:", field->id);
1637
1638 for (i = 0; i < iter->ent_size - offsetof(struct raw_data_entry, buf); i++)
1639 trace_seq_printf(&iter->seq, " %02x",
1640 (unsigned char)field->buf[i]);
1641
1642 trace_seq_putc(&iter->seq, '\n');
1643
1644 return trace_handle_return(&iter->seq);
1645 }
1646
1647 static struct trace_event_functions trace_raw_data_funcs = {
1648 .trace = trace_raw_data,
1649 .raw = trace_raw_data,
1650 };
1651
1652 static struct trace_event trace_raw_data_event = {
1653 .type = TRACE_RAW_DATA,
1654 .funcs = &trace_raw_data_funcs,
1655 };
1656
1657 static enum print_line_t
1658 trace_func_repeats_raw(struct trace_iterator *iter, int flags,
1659 struct trace_event *event)
1660 {
1661 struct func_repeats_entry *field;
1662 struct trace_seq *s = &iter->seq;
1663
1664 trace_assign_type(field, iter->ent);
1665
1666 trace_seq_printf(s, "%lu %lu %u %llu\n",
1667 field->ip,
1668 field->parent_ip,
1669 field->count,
1670 FUNC_REPEATS_GET_DELTA_TS(field));
1671
1672 return trace_handle_return(s);
1673 }
1674
1675 static enum print_line_t
1676 trace_func_repeats_print(struct trace_iterator *iter, int flags,
1677 struct trace_event *event)
1678 {
1679 struct func_repeats_entry *field;
1680 struct trace_seq *s = &iter->seq;
1681
1682 trace_assign_type(field, iter->ent);
1683
1684 print_fn_trace(s, field->ip, field->parent_ip, iter->tr->text_delta, flags);
1685 trace_seq_printf(s, " (repeats: %u, last_ts:", field->count);
1686 trace_print_time(s, iter,
1687 iter->ts - FUNC_REPEATS_GET_DELTA_TS(field));
1688 trace_seq_puts(s, ")\n");
1689
1690 return trace_handle_return(s);
1691 }
1692
1693 static struct trace_event_functions trace_func_repeats_funcs = {
1694 .trace = trace_func_repeats_print,
1695 .raw = trace_func_repeats_raw,
1696 };
1697
1698 static struct trace_event trace_func_repeats_event = {
1699 .type = TRACE_FUNC_REPEATS,
1700 .funcs = &trace_func_repeats_funcs,
1701 };
1702
1703 static struct trace_event *events[] __initdata = {
1704 &trace_fn_event,
1705 &trace_ctx_event,
1706 &trace_wake_event,
1707 &trace_stack_event,
1708 &trace_user_stack_event,
1709 &trace_bputs_event,
1710 &trace_bprint_event,
1711 &trace_print_event,
1712 &trace_hwlat_event,
1713 &trace_osnoise_event,
1714 &trace_timerlat_event,
1715 &trace_raw_data_event,
1716 &trace_func_repeats_event,
1717 NULL
1718 };
1719
1720 __init int init_events(void)
1721 {
1722 struct trace_event *event;
1723 int i, ret;
1724
1725 for (i = 0; events[i]; i++) {
1726 event = events[i];
1727 ret = register_trace_event(event);
1728 WARN_ONCE(!ret, "event %d failed to register", event->type);
1729 }
1730
1731 return 0;
1732 }
Kernel DRM miscellaneous fixes and cross-tree changes