Line data Source code
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 :
19 : DECLARE_RWSEM(trace_event_sem);
20 :
21 : static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly;
22 :
23 : static int next_event_type = __TRACE_LAST_TYPE;
24 :
25 0 : enum print_line_t trace_print_bputs_msg_only(struct trace_iterator *iter)
26 : {
27 0 : struct trace_seq *s = &iter->seq;
28 0 : struct trace_entry *entry = iter->ent;
29 0 : struct bputs_entry *field;
30 :
31 0 : trace_assign_type(field, entry);
32 :
33 0 : trace_seq_puts(s, field->str);
34 :
35 0 : return trace_handle_return(s);
36 : }
37 :
38 0 : enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter)
39 : {
40 0 : struct trace_seq *s = &iter->seq;
41 0 : struct trace_entry *entry = iter->ent;
42 0 : struct bprint_entry *field;
43 :
44 0 : trace_assign_type(field, entry);
45 :
46 0 : trace_seq_bprintf(s, field->fmt, field->buf);
47 :
48 0 : return trace_handle_return(s);
49 : }
50 :
51 0 : enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter)
52 : {
53 0 : struct trace_seq *s = &iter->seq;
54 0 : struct trace_entry *entry = iter->ent;
55 0 : struct print_entry *field;
56 :
57 0 : trace_assign_type(field, entry);
58 :
59 0 : trace_seq_puts(s, field->buf);
60 :
61 0 : return trace_handle_return(s);
62 : }
63 :
64 : const char *
65 0 : 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 0 : unsigned long mask;
70 0 : const char *str;
71 0 : const char *ret = trace_seq_buffer_ptr(p);
72 0 : int i, first = 1;
73 :
74 0 : for (i = 0; flag_array[i].name && flags; i++) {
75 :
76 0 : mask = flag_array[i].mask;
77 0 : if ((flags & mask) != mask)
78 0 : continue;
79 :
80 0 : str = flag_array[i].name;
81 0 : flags &= ~mask;
82 0 : if (!first && delim)
83 0 : trace_seq_puts(p, delim);
84 : else
85 : first = 0;
86 0 : trace_seq_puts(p, str);
87 : }
88 :
89 : /* check for left over flags */
90 0 : if (flags) {
91 0 : if (!first && delim)
92 0 : trace_seq_puts(p, delim);
93 0 : trace_seq_printf(p, "0x%lx", flags);
94 : }
95 :
96 0 : trace_seq_putc(p, 0);
97 :
98 0 : return ret;
99 : }
100 : EXPORT_SYMBOL(trace_print_flags_seq);
101 :
102 : const char *
103 0 : trace_print_symbols_seq(struct trace_seq *p, unsigned long val,
104 : const struct trace_print_flags *symbol_array)
105 : {
106 0 : int i;
107 0 : const char *ret = trace_seq_buffer_ptr(p);
108 :
109 0 : for (i = 0; symbol_array[i].name; i++) {
110 :
111 0 : if (val != symbol_array[i].mask)
112 0 : continue;
113 :
114 0 : trace_seq_puts(p, symbol_array[i].name);
115 0 : break;
116 : }
117 :
118 0 : if (ret == (const char *)(trace_seq_buffer_ptr(p)))
119 0 : trace_seq_printf(p, "0x%lx", val);
120 :
121 0 : trace_seq_putc(p, 0);
122 :
123 0 : 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 0 : trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr,
194 : unsigned int bitmask_size)
195 : {
196 0 : const char *ret = trace_seq_buffer_ptr(p);
197 :
198 0 : trace_seq_bitmask(p, bitmask_ptr, bitmask_size * 8);
199 0 : trace_seq_putc(p, 0);
200 :
201 0 : 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 0 : trace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len,
218 : bool concatenate)
219 : {
220 0 : int i;
221 0 : const char *ret = trace_seq_buffer_ptr(p);
222 0 : const char *fmt = concatenate ? "%*phN" : "%*ph";
223 :
224 0 : for (i = 0; i < buf_len; i += 16)
225 0 : trace_seq_printf(p, fmt, min(buf_len - i, 16), &buf[i]);
226 0 : trace_seq_putc(p, 0);
227 :
228 0 : return ret;
229 : }
230 : EXPORT_SYMBOL(trace_print_hex_seq);
231 :
232 : const char *
233 0 : trace_print_array_seq(struct trace_seq *p, const void *buf, int count,
234 : size_t el_size)
235 : {
236 0 : const char *ret = trace_seq_buffer_ptr(p);
237 0 : const char *prefix = "";
238 0 : void *ptr = (void *)buf;
239 0 : size_t buf_len = count * el_size;
240 :
241 0 : trace_seq_putc(p, '{');
242 :
243 0 : while (ptr < buf + buf_len) {
244 0 : switch (el_size) {
245 0 : case 1:
246 0 : trace_seq_printf(p, "%s0x%x", prefix,
247 0 : *(u8 *)ptr);
248 0 : break;
249 0 : case 2:
250 0 : trace_seq_printf(p, "%s0x%x", prefix,
251 0 : *(u16 *)ptr);
252 0 : break;
253 0 : case 4:
254 0 : trace_seq_printf(p, "%s0x%x", prefix,
255 : *(u32 *)ptr);
256 0 : break;
257 0 : case 8:
258 0 : trace_seq_printf(p, "%s0x%llx", prefix,
259 : *(u64 *)ptr);
260 0 : break;
261 0 : default:
262 0 : trace_seq_printf(p, "BAD SIZE:%zu 0x%x", el_size,
263 0 : *(u8 *)ptr);
264 0 : el_size = 1;
265 : }
266 0 : prefix = ",";
267 0 : ptr += el_size;
268 : }
269 :
270 0 : trace_seq_putc(p, '}');
271 0 : trace_seq_putc(p, 0);
272 :
273 0 : return ret;
274 : }
275 : EXPORT_SYMBOL(trace_print_array_seq);
276 :
277 : const char *
278 0 : trace_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 0 : const char *ret = trace_seq_buffer_ptr(p);
283 :
284 0 : trace_seq_putc(p, '\n');
285 0 : trace_seq_hex_dump(p, prefix_str, prefix_type,
286 : rowsize, groupsize, buf, len, ascii);
287 0 : trace_seq_putc(p, 0);
288 0 : return ret;
289 : }
290 : EXPORT_SYMBOL(trace_print_hex_dump_seq);
291 :
292 0 : int trace_raw_output_prep(struct trace_iterator *iter,
293 : struct trace_event *trace_event)
294 : {
295 0 : struct trace_event_call *event;
296 0 : struct trace_seq *s = &iter->seq;
297 0 : struct trace_seq *p = &iter->tmp_seq;
298 0 : struct trace_entry *entry;
299 :
300 0 : event = container_of(trace_event, struct trace_event_call, event);
301 0 : entry = iter->ent;
302 :
303 0 : if (entry->type != event->event.type) {
304 0 : WARN_ON_ONCE(1);
305 0 : return TRACE_TYPE_UNHANDLED;
306 : }
307 :
308 0 : trace_seq_init(p);
309 0 : trace_seq_printf(s, "%s: ", trace_event_name(event));
310 :
311 0 : return trace_handle_return(s);
312 : }
313 : EXPORT_SYMBOL(trace_raw_output_prep);
314 :
315 0 : void trace_event_printf(struct trace_iterator *iter, const char *fmt, ...)
316 : {
317 0 : va_list ap;
318 :
319 0 : va_start(ap, fmt);
320 0 : trace_seq_vprintf(&iter->seq, trace_event_format(iter, fmt), ap);
321 0 : va_end(ap);
322 0 : }
323 : EXPORT_SYMBOL(trace_event_printf);
324 :
325 0 : static int trace_output_raw(struct trace_iterator *iter, char *name,
326 : char *fmt, va_list ap)
327 : {
328 0 : struct trace_seq *s = &iter->seq;
329 :
330 0 : trace_seq_printf(s, "%s: ", name);
331 0 : trace_seq_vprintf(s, trace_event_format(iter, fmt), ap);
332 :
333 0 : return trace_handle_return(s);
334 : }
335 :
336 0 : int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...)
337 : {
338 0 : va_list ap;
339 0 : int ret;
340 :
341 0 : va_start(ap, fmt);
342 0 : ret = trace_output_raw(iter, name, fmt, ap);
343 0 : va_end(ap);
344 :
345 0 : return ret;
346 : }
347 : EXPORT_SYMBOL_GPL(trace_output_call);
348 :
349 : #ifdef CONFIG_KRETPROBES
350 : static 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
360 0 : static inline const char *kretprobed(const char *name)
361 : {
362 0 : return name;
363 : }
364 : #endif /* CONFIG_KRETPROBES */
365 :
366 : void
367 0 : trace_seq_print_sym(struct trace_seq *s, unsigned long address, bool offset)
368 : {
369 : #ifdef CONFIG_KALLSYMS
370 0 : char str[KSYM_SYMBOL_LEN];
371 0 : const char *name;
372 :
373 0 : if (offset)
374 0 : sprint_symbol(str, address);
375 : else
376 0 : kallsyms_lookup(address, NULL, NULL, NULL, str);
377 0 : name = kretprobed(str);
378 :
379 0 : if (name && strlen(name)) {
380 0 : trace_seq_puts(s, name);
381 0 : return;
382 : }
383 : #endif
384 0 : 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 :
393 0 : static int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
394 : unsigned long ip, unsigned long sym_flags)
395 : {
396 0 : struct file *file = NULL;
397 0 : unsigned long vmstart = 0;
398 0 : int ret = 1;
399 :
400 0 : if (s->full)
401 : return 0;
402 :
403 0 : if (mm) {
404 0 : const struct vm_area_struct *vma;
405 :
406 0 : mmap_read_lock(mm);
407 0 : vma = find_vma(mm, ip);
408 0 : if (vma) {
409 0 : file = vma->vm_file;
410 0 : vmstart = vma->vm_start;
411 : }
412 0 : if (file) {
413 0 : ret = trace_seq_path(s, &file->f_path);
414 0 : if (ret)
415 0 : trace_seq_printf(s, "[+0x%lx]",
416 : ip - vmstart);
417 : }
418 0 : mmap_read_unlock(mm);
419 : }
420 0 : if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file))
421 0 : trace_seq_printf(s, " <" IP_FMT ">", ip);
422 0 : return !trace_seq_has_overflowed(s);
423 : }
424 :
425 : int
426 0 : seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
427 : {
428 0 : if (!ip) {
429 0 : trace_seq_putc(s, '0');
430 0 : goto out;
431 : }
432 :
433 0 : trace_seq_print_sym(s, ip, sym_flags & TRACE_ITER_SYM_OFFSET);
434 :
435 0 : if (sym_flags & TRACE_ITER_SYM_ADDR)
436 0 : trace_seq_printf(s, " <" IP_FMT ">", ip);
437 :
438 0 : out:
439 0 : 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 : */
450 0 : int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
451 : {
452 0 : char hardsoft_irq;
453 0 : char need_resched;
454 0 : char irqs_off;
455 0 : int hardirq;
456 0 : int softirq;
457 0 : int nmi;
458 :
459 0 : nmi = entry->flags & TRACE_FLAG_NMI;
460 0 : hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
461 0 : softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
462 :
463 0 : irqs_off =
464 : (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
465 : (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' :
466 : '.';
467 :
468 0 : 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 0 : case TRACE_FLAG_NEED_RESCHED:
474 0 : need_resched = 'n';
475 0 : break;
476 0 : case TRACE_FLAG_PREEMPT_RESCHED:
477 0 : need_resched = 'p';
478 0 : break;
479 0 : default:
480 0 : need_resched = '.';
481 0 : break;
482 : }
483 :
484 0 : hardsoft_irq =
485 0 : (nmi && hardirq) ? 'Z' :
486 : nmi ? 'z' :
487 0 : (hardirq && softirq) ? 'H' :
488 : hardirq ? 'h' :
489 : softirq ? 's' :
490 : '.' ;
491 :
492 0 : trace_seq_printf(s, "%c%c%c",
493 : irqs_off, need_resched, hardsoft_irq);
494 :
495 0 : if (entry->preempt_count)
496 0 : trace_seq_printf(s, "%x", entry->preempt_count);
497 : else
498 0 : trace_seq_putc(s, '.');
499 :
500 0 : return !trace_seq_has_overflowed(s);
501 : }
502 :
503 : static int
504 0 : lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
505 : {
506 0 : char comm[TASK_COMM_LEN];
507 :
508 0 : trace_find_cmdline(entry->pid, comm);
509 :
510 0 : trace_seq_printf(s, "%8.8s-%-7d %3d",
511 : comm, entry->pid, cpu);
512 :
513 0 : 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 */
519 : static 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 :
532 0 : char trace_find_mark(unsigned long long d)
533 : {
534 0 : int i;
535 0 : int size = ARRAY_SIZE(mark);
536 :
537 0 : for (i = 0; i < size; i++) {
538 0 : if (d > mark[i].val)
539 : break;
540 : }
541 :
542 0 : return (i == size) ? ' ' : mark[i].sym;
543 : }
544 :
545 : static int
546 0 : lat_print_timestamp(struct trace_iterator *iter, u64 next_ts)
547 : {
548 0 : struct trace_array *tr = iter->tr;
549 0 : unsigned long verbose = tr->trace_flags & TRACE_ITER_VERBOSE;
550 0 : unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS;
551 0 : unsigned long long abs_ts = iter->ts - iter->array_buffer->time_start;
552 0 : unsigned long long rel_ts = next_ts - iter->ts;
553 0 : struct trace_seq *s = &iter->seq;
554 :
555 0 : if (in_ns) {
556 0 : abs_ts = ns2usecs(abs_ts);
557 0 : rel_ts = ns2usecs(rel_ts);
558 : }
559 :
560 0 : if (verbose && in_ns) {
561 0 : unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC);
562 0 : unsigned long abs_msec = (unsigned long)abs_ts;
563 0 : unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC);
564 0 : unsigned long rel_msec = (unsigned long)rel_ts;
565 :
566 0 : 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 0 : } else if (verbose && !in_ns) {
573 0 : trace_seq_printf(
574 : s, "[%016llx] %lld (+%lld): ",
575 : iter->ts, abs_ts, rel_ts);
576 :
577 0 : } else if (!verbose && in_ns) {
578 0 : trace_seq_printf(
579 : s, " %4lldus%c: ",
580 : abs_ts,
581 0 : trace_find_mark(rel_ts * NSEC_PER_USEC));
582 :
583 : } else { /* !verbose && !in_ns */
584 0 : trace_seq_printf(s, " %4lld: ", abs_ts);
585 : }
586 :
587 0 : return !trace_seq_has_overflowed(s);
588 : }
589 :
590 0 : int trace_print_context(struct trace_iterator *iter)
591 : {
592 0 : struct trace_array *tr = iter->tr;
593 0 : struct trace_seq *s = &iter->seq;
594 0 : struct trace_entry *entry = iter->ent;
595 0 : unsigned long long t;
596 0 : unsigned long secs, usec_rem;
597 0 : char comm[TASK_COMM_LEN];
598 :
599 0 : trace_find_cmdline(entry->pid, comm);
600 :
601 0 : trace_seq_printf(s, "%16s-%-7d ", comm, entry->pid);
602 :
603 0 : if (tr->trace_flags & TRACE_ITER_RECORD_TGID) {
604 0 : unsigned int tgid = trace_find_tgid(entry->pid);
605 :
606 0 : if (!tgid)
607 0 : trace_seq_printf(s, "(-------) ");
608 : else
609 0 : trace_seq_printf(s, "(%7d) ", tgid);
610 : }
611 :
612 0 : trace_seq_printf(s, "[%03d] ", iter->cpu);
613 :
614 0 : if (tr->trace_flags & TRACE_ITER_IRQ_INFO)
615 0 : trace_print_lat_fmt(s, entry);
616 :
617 0 : if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) {
618 0 : t = ns2usecs(iter->ts);
619 0 : usec_rem = do_div(t, USEC_PER_SEC);
620 0 : secs = (unsigned long)t;
621 0 : trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem);
622 : } else
623 0 : trace_seq_printf(s, " %12llu: ", iter->ts);
624 :
625 0 : return !trace_seq_has_overflowed(s);
626 : }
627 :
628 0 : int trace_print_lat_context(struct trace_iterator *iter)
629 : {
630 0 : struct trace_entry *entry, *next_entry;
631 0 : struct trace_array *tr = iter->tr;
632 0 : struct trace_seq *s = &iter->seq;
633 0 : unsigned long verbose = (tr->trace_flags & TRACE_ITER_VERBOSE);
634 0 : u64 next_ts;
635 :
636 0 : next_entry = trace_find_next_entry(iter, NULL, &next_ts);
637 0 : if (!next_entry)
638 0 : next_ts = iter->ts;
639 :
640 : /* trace_find_next_entry() may change iter->ent */
641 0 : entry = iter->ent;
642 :
643 0 : if (verbose) {
644 0 : char comm[TASK_COMM_LEN];
645 :
646 0 : trace_find_cmdline(entry->pid, comm);
647 :
648 0 : trace_seq_printf(
649 : s, "%16s %7d %3d %d %08x %08lx ",
650 0 : comm, entry->pid, iter->cpu, entry->flags,
651 0 : entry->preempt_count, iter->idx);
652 : } else {
653 0 : lat_print_generic(s, entry, iter->cpu);
654 : }
655 :
656 0 : lat_print_timestamp(iter, next_ts);
657 :
658 0 : return !trace_seq_has_overflowed(s);
659 : }
660 :
661 : /**
662 : * ftrace_find_event - find a registered event
663 : * @type: the type of event to look for
664 : *
665 : * Returns an event of type @type otherwise NULL
666 : * Called with trace_event_read_lock() held.
667 : */
668 537 : struct trace_event *ftrace_find_event(int type)
669 : {
670 537 : struct trace_event *event;
671 537 : unsigned key;
672 :
673 537 : key = type & (EVENT_HASHSIZE - 1);
674 :
675 1942 : hlist_for_each_entry(event, &event_hash[key], node) {
676 868 : if (event->type == type)
677 0 : return event;
678 : }
679 :
680 : return NULL;
681 : }
682 :
683 : static LIST_HEAD(ftrace_event_list);
684 :
685 0 : static int trace_search_list(struct list_head **list)
686 : {
687 0 : struct trace_event *e;
688 0 : int next = __TRACE_LAST_TYPE;
689 :
690 0 : if (list_empty(&ftrace_event_list)) {
691 0 : *list = &ftrace_event_list;
692 0 : return next;
693 : }
694 :
695 : /*
696 : * We used up all possible max events,
697 : * lets see if somebody freed one.
698 : */
699 0 : list_for_each_entry(e, &ftrace_event_list, list) {
700 0 : if (e->type != next)
701 : break;
702 0 : next++;
703 : }
704 :
705 : /* Did we used up all 65 thousand events??? */
706 0 : if (next > TRACE_EVENT_TYPE_MAX)
707 : return 0;
708 :
709 0 : *list = &e->list;
710 0 : return next;
711 : }
712 :
713 0 : void trace_event_read_lock(void)
714 : {
715 0 : down_read(&trace_event_sem);
716 0 : }
717 :
718 0 : void trace_event_read_unlock(void)
719 : {
720 0 : up_read(&trace_event_sem);
721 0 : }
722 :
723 : /**
724 : * register_trace_event - register output for an event type
725 : * @event: the event type to register
726 : *
727 : * Event types are stored in a hash and this hash is used to
728 : * find a way to print an event. If the @event->type is set
729 : * then it will use that type, otherwise it will assign a
730 : * type to use.
731 : *
732 : * If you assign your own type, please make sure it is added
733 : * to the trace_type enum in trace.h, to avoid collisions
734 : * with the dynamic types.
735 : *
736 : * Returns the event type number or zero on error.
737 : */
738 537 : int register_trace_event(struct trace_event *event)
739 : {
740 537 : unsigned key;
741 537 : int ret = 0;
742 :
743 537 : down_write(&trace_event_sem);
744 :
745 537 : if (WARN_ON(!event))
746 0 : goto out;
747 :
748 537 : if (WARN_ON(!event->funcs))
749 0 : goto out;
750 :
751 537 : INIT_LIST_HEAD(&event->list);
752 :
753 537 : if (!event->type) {
754 527 : struct list_head *list = NULL;
755 :
756 527 : if (next_event_type > TRACE_EVENT_TYPE_MAX) {
757 :
758 0 : event->type = trace_search_list(&list);
759 0 : if (!event->type)
760 0 : goto out;
761 :
762 : } else {
763 :
764 527 : event->type = next_event_type++;
765 527 : list = &ftrace_event_list;
766 : }
767 :
768 527 : if (WARN_ON(ftrace_find_event(event->type)))
769 0 : goto out;
770 :
771 527 : list_add_tail(&event->list, list);
772 :
773 10 : } else if (event->type > __TRACE_LAST_TYPE) {
774 0 : printk(KERN_WARNING "Need to add type to trace.h\n");
775 0 : WARN_ON(1);
776 0 : goto out;
777 : } else {
778 : /* Is this event already used */
779 10 : if (ftrace_find_event(event->type))
780 0 : goto out;
781 : }
782 :
783 537 : if (event->funcs->trace == NULL)
784 0 : event->funcs->trace = trace_nop_print;
785 537 : if (event->funcs->raw == NULL)
786 358 : event->funcs->raw = trace_nop_print;
787 537 : if (event->funcs->hex == NULL)
788 363 : event->funcs->hex = trace_nop_print;
789 537 : if (event->funcs->binary == NULL)
790 363 : event->funcs->binary = trace_nop_print;
791 :
792 537 : key = event->type & (EVENT_HASHSIZE - 1);
793 :
794 537 : hlist_add_head(&event->node, &event_hash[key]);
795 :
796 537 : ret = event->type;
797 537 : out:
798 537 : up_write(&trace_event_sem);
799 :
800 537 : return ret;
801 : }
802 : EXPORT_SYMBOL_GPL(register_trace_event);
803 :
804 : /*
805 : * Used by module code with the trace_event_sem held for write.
806 : */
807 0 : int __unregister_trace_event(struct trace_event *event)
808 : {
809 0 : hlist_del(&event->node);
810 0 : list_del(&event->list);
811 0 : return 0;
812 : }
813 :
814 : /**
815 : * unregister_trace_event - remove a no longer used event
816 : * @event: the event to remove
817 : */
818 0 : int unregister_trace_event(struct trace_event *event)
819 : {
820 0 : down_write(&trace_event_sem);
821 0 : __unregister_trace_event(event);
822 0 : up_write(&trace_event_sem);
823 :
824 0 : return 0;
825 : }
826 : EXPORT_SYMBOL_GPL(unregister_trace_event);
827 :
828 : /*
829 : * Standard events
830 : */
831 :
832 0 : enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags,
833 : struct trace_event *event)
834 : {
835 0 : trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type);
836 :
837 0 : return trace_handle_return(&iter->seq);
838 : }
839 :
840 : /* TRACE_FN */
841 0 : static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags,
842 : struct trace_event *event)
843 : {
844 0 : struct ftrace_entry *field;
845 0 : struct trace_seq *s = &iter->seq;
846 :
847 0 : trace_assign_type(field, iter->ent);
848 :
849 0 : seq_print_ip_sym(s, field->ip, flags);
850 :
851 0 : if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) {
852 0 : trace_seq_puts(s, " <-");
853 0 : seq_print_ip_sym(s, field->parent_ip, flags);
854 : }
855 :
856 0 : trace_seq_putc(s, '\n');
857 :
858 0 : return trace_handle_return(s);
859 : }
860 :
861 0 : static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags,
862 : struct trace_event *event)
863 : {
864 0 : struct ftrace_entry *field;
865 :
866 0 : trace_assign_type(field, iter->ent);
867 :
868 0 : trace_seq_printf(&iter->seq, "%lx %lx\n",
869 : field->ip,
870 : field->parent_ip);
871 :
872 0 : return trace_handle_return(&iter->seq);
873 : }
874 :
875 0 : static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags,
876 : struct trace_event *event)
877 : {
878 0 : struct ftrace_entry *field;
879 0 : struct trace_seq *s = &iter->seq;
880 :
881 0 : trace_assign_type(field, iter->ent);
882 :
883 0 : SEQ_PUT_HEX_FIELD(s, field->ip);
884 0 : SEQ_PUT_HEX_FIELD(s, field->parent_ip);
885 :
886 0 : return trace_handle_return(s);
887 : }
888 :
889 0 : static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags,
890 : struct trace_event *event)
891 : {
892 0 : struct ftrace_entry *field;
893 0 : struct trace_seq *s = &iter->seq;
894 :
895 0 : trace_assign_type(field, iter->ent);
896 :
897 0 : SEQ_PUT_FIELD(s, field->ip);
898 0 : SEQ_PUT_FIELD(s, field->parent_ip);
899 :
900 0 : return trace_handle_return(s);
901 : }
902 :
903 : static struct trace_event_functions trace_fn_funcs = {
904 : .trace = trace_fn_trace,
905 : .raw = trace_fn_raw,
906 : .hex = trace_fn_hex,
907 : .binary = trace_fn_bin,
908 : };
909 :
910 : static struct trace_event trace_fn_event = {
911 : .type = TRACE_FN,
912 : .funcs = &trace_fn_funcs,
913 : };
914 :
915 : /* TRACE_CTX an TRACE_WAKE */
916 0 : static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
917 : char *delim)
918 : {
919 0 : struct ctx_switch_entry *field;
920 0 : char comm[TASK_COMM_LEN];
921 0 : int S, T;
922 :
923 :
924 0 : trace_assign_type(field, iter->ent);
925 :
926 0 : T = task_index_to_char(field->next_state);
927 0 : S = task_index_to_char(field->prev_state);
928 0 : trace_find_cmdline(field->next_pid, comm);
929 0 : trace_seq_printf(&iter->seq,
930 : " %7d:%3d:%c %s [%03d] %7d:%3d:%c %s\n",
931 : field->prev_pid,
932 0 : field->prev_prio,
933 : S, delim,
934 : field->next_cpu,
935 : field->next_pid,
936 0 : field->next_prio,
937 : T, comm);
938 :
939 0 : return trace_handle_return(&iter->seq);
940 : }
941 :
942 0 : static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags,
943 : struct trace_event *event)
944 : {
945 0 : return trace_ctxwake_print(iter, "==>");
946 : }
947 :
948 0 : static enum print_line_t trace_wake_print(struct trace_iterator *iter,
949 : int flags, struct trace_event *event)
950 : {
951 0 : return trace_ctxwake_print(iter, " +");
952 : }
953 :
954 0 : static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
955 : {
956 0 : struct ctx_switch_entry *field;
957 0 : int T;
958 :
959 0 : trace_assign_type(field, iter->ent);
960 :
961 0 : if (!S)
962 0 : S = task_index_to_char(field->prev_state);
963 0 : T = task_index_to_char(field->next_state);
964 0 : trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n",
965 : field->prev_pid,
966 0 : field->prev_prio,
967 : S,
968 : field->next_cpu,
969 : field->next_pid,
970 0 : field->next_prio,
971 : T);
972 :
973 0 : return trace_handle_return(&iter->seq);
974 : }
975 :
976 0 : static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags,
977 : struct trace_event *event)
978 : {
979 0 : return trace_ctxwake_raw(iter, 0);
980 : }
981 :
982 0 : static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags,
983 : struct trace_event *event)
984 : {
985 0 : return trace_ctxwake_raw(iter, '+');
986 : }
987 :
988 :
989 0 : static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
990 : {
991 0 : struct ctx_switch_entry *field;
992 0 : struct trace_seq *s = &iter->seq;
993 0 : int T;
994 :
995 0 : trace_assign_type(field, iter->ent);
996 :
997 0 : if (!S)
998 0 : S = task_index_to_char(field->prev_state);
999 0 : T = task_index_to_char(field->next_state);
1000 :
1001 0 : SEQ_PUT_HEX_FIELD(s, field->prev_pid);
1002 0 : SEQ_PUT_HEX_FIELD(s, field->prev_prio);
1003 0 : SEQ_PUT_HEX_FIELD(s, S);
1004 0 : SEQ_PUT_HEX_FIELD(s, field->next_cpu);
1005 0 : SEQ_PUT_HEX_FIELD(s, field->next_pid);
1006 0 : SEQ_PUT_HEX_FIELD(s, field->next_prio);
1007 0 : SEQ_PUT_HEX_FIELD(s, T);
1008 :
1009 0 : return trace_handle_return(s);
1010 : }
1011 :
1012 0 : static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags,
1013 : struct trace_event *event)
1014 : {
1015 0 : return trace_ctxwake_hex(iter, 0);
1016 : }
1017 :
1018 0 : static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags,
1019 : struct trace_event *event)
1020 : {
1021 0 : return trace_ctxwake_hex(iter, '+');
1022 : }
1023 :
1024 0 : static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
1025 : int flags, struct trace_event *event)
1026 : {
1027 0 : struct ctx_switch_entry *field;
1028 0 : struct trace_seq *s = &iter->seq;
1029 :
1030 0 : trace_assign_type(field, iter->ent);
1031 :
1032 0 : SEQ_PUT_FIELD(s, field->prev_pid);
1033 0 : SEQ_PUT_FIELD(s, field->prev_prio);
1034 0 : SEQ_PUT_FIELD(s, field->prev_state);
1035 0 : SEQ_PUT_FIELD(s, field->next_cpu);
1036 0 : SEQ_PUT_FIELD(s, field->next_pid);
1037 0 : SEQ_PUT_FIELD(s, field->next_prio);
1038 0 : SEQ_PUT_FIELD(s, field->next_state);
1039 :
1040 0 : return trace_handle_return(s);
1041 : }
1042 :
1043 : static struct trace_event_functions trace_ctx_funcs = {
1044 : .trace = trace_ctx_print,
1045 : .raw = trace_ctx_raw,
1046 : .hex = trace_ctx_hex,
1047 : .binary = trace_ctxwake_bin,
1048 : };
1049 :
1050 : static struct trace_event trace_ctx_event = {
1051 : .type = TRACE_CTX,
1052 : .funcs = &trace_ctx_funcs,
1053 : };
1054 :
1055 : static struct trace_event_functions trace_wake_funcs = {
1056 : .trace = trace_wake_print,
1057 : .raw = trace_wake_raw,
1058 : .hex = trace_wake_hex,
1059 : .binary = trace_ctxwake_bin,
1060 : };
1061 :
1062 : static struct trace_event trace_wake_event = {
1063 : .type = TRACE_WAKE,
1064 : .funcs = &trace_wake_funcs,
1065 : };
1066 :
1067 : /* TRACE_STACK */
1068 :
1069 0 : static enum print_line_t trace_stack_print(struct trace_iterator *iter,
1070 : int flags, struct trace_event *event)
1071 : {
1072 0 : struct stack_entry *field;
1073 0 : struct trace_seq *s = &iter->seq;
1074 0 : unsigned long *p;
1075 0 : unsigned long *end;
1076 :
1077 0 : trace_assign_type(field, iter->ent);
1078 0 : end = (unsigned long *)((long)iter->ent + iter->ent_size);
1079 :
1080 0 : trace_seq_puts(s, "<stack trace>\n");
1081 :
1082 0 : for (p = field->caller; p && p < end && *p != ULONG_MAX; p++) {
1083 :
1084 0 : if (trace_seq_has_overflowed(s))
1085 : break;
1086 :
1087 0 : trace_seq_puts(s, " => ");
1088 0 : seq_print_ip_sym(s, *p, flags);
1089 0 : trace_seq_putc(s, '\n');
1090 : }
1091 :
1092 0 : return trace_handle_return(s);
1093 : }
1094 :
1095 : static struct trace_event_functions trace_stack_funcs = {
1096 : .trace = trace_stack_print,
1097 : };
1098 :
1099 : static struct trace_event trace_stack_event = {
1100 : .type = TRACE_STACK,
1101 : .funcs = &trace_stack_funcs,
1102 : };
1103 :
1104 : /* TRACE_USER_STACK */
1105 0 : static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
1106 : int flags, struct trace_event *event)
1107 : {
1108 0 : struct trace_array *tr = iter->tr;
1109 0 : struct userstack_entry *field;
1110 0 : struct trace_seq *s = &iter->seq;
1111 0 : struct mm_struct *mm = NULL;
1112 0 : unsigned int i;
1113 :
1114 0 : trace_assign_type(field, iter->ent);
1115 :
1116 0 : trace_seq_puts(s, "<user stack trace>\n");
1117 :
1118 0 : if (tr->trace_flags & TRACE_ITER_SYM_USEROBJ) {
1119 0 : struct task_struct *task;
1120 : /*
1121 : * we do the lookup on the thread group leader,
1122 : * since individual threads might have already quit!
1123 : */
1124 0 : rcu_read_lock();
1125 0 : task = find_task_by_vpid(field->tgid);
1126 0 : if (task)
1127 0 : mm = get_task_mm(task);
1128 0 : rcu_read_unlock();
1129 : }
1130 :
1131 0 : for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
1132 0 : unsigned long ip = field->caller[i];
1133 :
1134 0 : if (!ip || trace_seq_has_overflowed(s))
1135 : break;
1136 :
1137 0 : trace_seq_puts(s, " => ");
1138 0 : seq_print_user_ip(s, mm, ip, flags);
1139 0 : trace_seq_putc(s, '\n');
1140 : }
1141 :
1142 0 : if (mm)
1143 0 : mmput(mm);
1144 :
1145 0 : return trace_handle_return(s);
1146 : }
1147 :
1148 : static struct trace_event_functions trace_user_stack_funcs = {
1149 : .trace = trace_user_stack_print,
1150 : };
1151 :
1152 : static struct trace_event trace_user_stack_event = {
1153 : .type = TRACE_USER_STACK,
1154 : .funcs = &trace_user_stack_funcs,
1155 : };
1156 :
1157 : /* TRACE_HWLAT */
1158 : static enum print_line_t
1159 0 : trace_hwlat_print(struct trace_iterator *iter, int flags,
1160 : struct trace_event *event)
1161 : {
1162 0 : struct trace_entry *entry = iter->ent;
1163 0 : struct trace_seq *s = &iter->seq;
1164 0 : struct hwlat_entry *field;
1165 :
1166 0 : trace_assign_type(field, entry);
1167 :
1168 0 : trace_seq_printf(s, "#%-5u inner/outer(us): %4llu/%-5llu ts:%lld.%09ld count:%d",
1169 : field->seqnum,
1170 : field->duration,
1171 : field->outer_duration,
1172 0 : (long long)field->timestamp.tv_sec,
1173 : field->timestamp.tv_nsec, field->count);
1174 :
1175 0 : if (field->nmi_count) {
1176 : /*
1177 : * The generic sched_clock() is not NMI safe, thus
1178 : * we only record the count and not the time.
1179 : */
1180 0 : if (!IS_ENABLED(CONFIG_GENERIC_SCHED_CLOCK))
1181 0 : trace_seq_printf(s, " nmi-total:%llu",
1182 : field->nmi_total_ts);
1183 0 : trace_seq_printf(s, " nmi-count:%u",
1184 : field->nmi_count);
1185 : }
1186 :
1187 0 : trace_seq_putc(s, '\n');
1188 :
1189 0 : return trace_handle_return(s);
1190 : }
1191 :
1192 :
1193 : static enum print_line_t
1194 0 : trace_hwlat_raw(struct trace_iterator *iter, int flags,
1195 : struct trace_event *event)
1196 : {
1197 0 : struct hwlat_entry *field;
1198 0 : struct trace_seq *s = &iter->seq;
1199 :
1200 0 : trace_assign_type(field, iter->ent);
1201 :
1202 0 : trace_seq_printf(s, "%llu %lld %lld %09ld %u\n",
1203 : field->duration,
1204 : field->outer_duration,
1205 0 : (long long)field->timestamp.tv_sec,
1206 : field->timestamp.tv_nsec,
1207 : field->seqnum);
1208 :
1209 0 : return trace_handle_return(s);
1210 : }
1211 :
1212 : static struct trace_event_functions trace_hwlat_funcs = {
1213 : .trace = trace_hwlat_print,
1214 : .raw = trace_hwlat_raw,
1215 : };
1216 :
1217 : static struct trace_event trace_hwlat_event = {
1218 : .type = TRACE_HWLAT,
1219 : .funcs = &trace_hwlat_funcs,
1220 : };
1221 :
1222 : /* TRACE_BPUTS */
1223 : static enum print_line_t
1224 0 : trace_bputs_print(struct trace_iterator *iter, int flags,
1225 : struct trace_event *event)
1226 : {
1227 0 : struct trace_entry *entry = iter->ent;
1228 0 : struct trace_seq *s = &iter->seq;
1229 0 : struct bputs_entry *field;
1230 :
1231 0 : trace_assign_type(field, entry);
1232 :
1233 0 : seq_print_ip_sym(s, field->ip, flags);
1234 0 : trace_seq_puts(s, ": ");
1235 0 : trace_seq_puts(s, field->str);
1236 :
1237 0 : return trace_handle_return(s);
1238 : }
1239 :
1240 :
1241 : static enum print_line_t
1242 0 : trace_bputs_raw(struct trace_iterator *iter, int flags,
1243 : struct trace_event *event)
1244 : {
1245 0 : struct bputs_entry *field;
1246 0 : struct trace_seq *s = &iter->seq;
1247 :
1248 0 : trace_assign_type(field, iter->ent);
1249 :
1250 0 : trace_seq_printf(s, ": %lx : ", field->ip);
1251 0 : trace_seq_puts(s, field->str);
1252 :
1253 0 : return trace_handle_return(s);
1254 : }
1255 :
1256 : static struct trace_event_functions trace_bputs_funcs = {
1257 : .trace = trace_bputs_print,
1258 : .raw = trace_bputs_raw,
1259 : };
1260 :
1261 : static struct trace_event trace_bputs_event = {
1262 : .type = TRACE_BPUTS,
1263 : .funcs = &trace_bputs_funcs,
1264 : };
1265 :
1266 : /* TRACE_BPRINT */
1267 : static enum print_line_t
1268 0 : trace_bprint_print(struct trace_iterator *iter, int flags,
1269 : struct trace_event *event)
1270 : {
1271 0 : struct trace_entry *entry = iter->ent;
1272 0 : struct trace_seq *s = &iter->seq;
1273 0 : struct bprint_entry *field;
1274 :
1275 0 : trace_assign_type(field, entry);
1276 :
1277 0 : seq_print_ip_sym(s, field->ip, flags);
1278 0 : trace_seq_puts(s, ": ");
1279 0 : trace_seq_bprintf(s, field->fmt, field->buf);
1280 :
1281 0 : return trace_handle_return(s);
1282 : }
1283 :
1284 :
1285 : static enum print_line_t
1286 0 : trace_bprint_raw(struct trace_iterator *iter, int flags,
1287 : struct trace_event *event)
1288 : {
1289 0 : struct bprint_entry *field;
1290 0 : struct trace_seq *s = &iter->seq;
1291 :
1292 0 : trace_assign_type(field, iter->ent);
1293 :
1294 0 : trace_seq_printf(s, ": %lx : ", field->ip);
1295 0 : trace_seq_bprintf(s, field->fmt, field->buf);
1296 :
1297 0 : return trace_handle_return(s);
1298 : }
1299 :
1300 : static struct trace_event_functions trace_bprint_funcs = {
1301 : .trace = trace_bprint_print,
1302 : .raw = trace_bprint_raw,
1303 : };
1304 :
1305 : static struct trace_event trace_bprint_event = {
1306 : .type = TRACE_BPRINT,
1307 : .funcs = &trace_bprint_funcs,
1308 : };
1309 :
1310 : /* TRACE_PRINT */
1311 0 : static enum print_line_t trace_print_print(struct trace_iterator *iter,
1312 : int flags, struct trace_event *event)
1313 : {
1314 0 : struct print_entry *field;
1315 0 : struct trace_seq *s = &iter->seq;
1316 :
1317 0 : trace_assign_type(field, iter->ent);
1318 :
1319 0 : seq_print_ip_sym(s, field->ip, flags);
1320 0 : trace_seq_printf(s, ": %s", field->buf);
1321 :
1322 0 : return trace_handle_return(s);
1323 : }
1324 :
1325 0 : static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags,
1326 : struct trace_event *event)
1327 : {
1328 0 : struct print_entry *field;
1329 :
1330 0 : trace_assign_type(field, iter->ent);
1331 :
1332 0 : trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf);
1333 :
1334 0 : return trace_handle_return(&iter->seq);
1335 : }
1336 :
1337 : static struct trace_event_functions trace_print_funcs = {
1338 : .trace = trace_print_print,
1339 : .raw = trace_print_raw,
1340 : };
1341 :
1342 : static struct trace_event trace_print_event = {
1343 : .type = TRACE_PRINT,
1344 : .funcs = &trace_print_funcs,
1345 : };
1346 :
1347 0 : static enum print_line_t trace_raw_data(struct trace_iterator *iter, int flags,
1348 : struct trace_event *event)
1349 : {
1350 0 : struct raw_data_entry *field;
1351 0 : int i;
1352 :
1353 0 : trace_assign_type(field, iter->ent);
1354 :
1355 0 : trace_seq_printf(&iter->seq, "# %x buf:", field->id);
1356 :
1357 0 : for (i = 0; i < iter->ent_size - offsetof(struct raw_data_entry, buf); i++)
1358 0 : trace_seq_printf(&iter->seq, " %02x",
1359 0 : (unsigned char)field->buf[i]);
1360 :
1361 0 : trace_seq_putc(&iter->seq, '\n');
1362 :
1363 0 : return trace_handle_return(&iter->seq);
1364 : }
1365 :
1366 : static struct trace_event_functions trace_raw_data_funcs = {
1367 : .trace = trace_raw_data,
1368 : .raw = trace_raw_data,
1369 : };
1370 :
1371 : static struct trace_event trace_raw_data_event = {
1372 : .type = TRACE_RAW_DATA,
1373 : .funcs = &trace_raw_data_funcs,
1374 : };
1375 :
1376 :
1377 : static struct trace_event *events[] __initdata = {
1378 : &trace_fn_event,
1379 : &trace_ctx_event,
1380 : &trace_wake_event,
1381 : &trace_stack_event,
1382 : &trace_user_stack_event,
1383 : &trace_bputs_event,
1384 : &trace_bprint_event,
1385 : &trace_print_event,
1386 : &trace_hwlat_event,
1387 : &trace_raw_data_event,
1388 : NULL
1389 : };
1390 :
1391 1 : __init static int init_events(void)
1392 : {
1393 1 : struct trace_event *event;
1394 1 : int i, ret;
1395 :
1396 11 : for (i = 0; events[i]; i++) {
1397 10 : event = events[i];
1398 :
1399 10 : ret = register_trace_event(event);
1400 10 : if (!ret) {
1401 0 : printk(KERN_WARNING "event %d failed to register\n",
1402 : event->type);
1403 0 : WARN_ON_ONCE(1);
1404 : }
1405 : }
1406 :
1407 1 : return 0;
1408 : }
1409 : early_initcall(init_events);
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