kernel/trace/trace_output.c

   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 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                 trace_seq_printf(p, fmt, min(buf_len - i, 16), &buf[i]);
 226         trace_seq_putc(p, 0);
 227
 228         return ret;
 229 }
 230 EXPORT_SYMBOL(trace_print_hex_seq);
 231
 232 const char *
 233 trace_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 }
 275 EXPORT_SYMBOL(trace_print_array_seq);
 276
 277 const char *
 278 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         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 }
 290 EXPORT_SYMBOL(trace_print_hex_dump_seq);
 291
 292 int 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 }
 313 EXPORT_SYMBOL(trace_raw_output_prep);
 314
 315 void 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 }
 323 EXPORT_SYMBOL(trace_event_printf);
 324
 325 static 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
 336 int 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 }
 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 static inline const char *kretprobed(const char *name)
 361 {
 362         return name;
 363 }
 364 #endif /* CONFIG_KRETPROBES */
 365
 366 void
 367 trace_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
 393 static 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
 425 int
 426 seq_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  */
 450 int 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 & 0xf)
 496                 trace_seq_printf(s, "%x", entry->preempt_count & 0xf);
 497         else
 498                 trace_seq_putc(s, '.');
 499
 500         if (entry->preempt_count & 0xf0)
 501                 trace_seq_printf(s, "%x", entry->preempt_count >> 4);
 502         else
 503                 trace_seq_putc(s, '.');
 504
 505         return !trace_seq_has_overflowed(s);
 506 }
 507
 508 static int
 509 lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
 510 {
 511         char comm[TASK_COMM_LEN];
 512
 513         trace_find_cmdline(entry->pid, comm);
 514
 515         trace_seq_printf(s, "%8.8s-%-7d %3d",
 516                          comm, entry->pid, cpu);
 517
 518         return trace_print_lat_fmt(s, entry);
 519 }
 520
 521 #undef MARK
 522 #define MARK(v, s) {.val = v, .sym = s}
 523 /* trace overhead mark */
 524 static const struct trace_mark {
 525         unsigned long long      val; /* unit: nsec */
 526         char                    sym;
 527 } mark[] = {
 528         MARK(1000000000ULL      , '$'), /* 1 sec */
 529         MARK(100000000ULL       , '@'), /* 100 msec */
 530         MARK(10000000ULL        , '*'), /* 10 msec */
 531         MARK(1000000ULL         , '#'), /* 1000 usecs */
 532         MARK(100000ULL          , '!'), /* 100 usecs */
 533         MARK(10000ULL           , '+'), /* 10 usecs */
 534 };
 535 #undef MARK
 536
 537 char trace_find_mark(unsigned long long d)
 538 {
 539         int i;
 540         int size = ARRAY_SIZE(mark);
 541
 542         for (i = 0; i < size; i++) {
 543                 if (d > mark[i].val)
 544                         break;
 545         }
 546
 547         return (i == size) ? ' ' : mark[i].sym;
 548 }
 549
 550 static int
 551 lat_print_timestamp(struct trace_iterator *iter, u64 next_ts)
 552 {
 553         struct trace_array *tr = iter->tr;
 554         unsigned long verbose = tr->trace_flags & TRACE_ITER_VERBOSE;
 555         unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS;
 556         unsigned long long abs_ts = iter->ts - iter->array_buffer->time_start;
 557         unsigned long long rel_ts = next_ts - iter->ts;
 558         struct trace_seq *s = &iter->seq;
 559
 560         if (in_ns) {
 561                 abs_ts = ns2usecs(abs_ts);
 562                 rel_ts = ns2usecs(rel_ts);
 563         }
 564
 565         if (verbose && in_ns) {
 566                 unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC);
 567                 unsigned long abs_msec = (unsigned long)abs_ts;
 568                 unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC);
 569                 unsigned long rel_msec = (unsigned long)rel_ts;
 570
 571                 trace_seq_printf(
 572                         s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ",
 573                         ns2usecs(iter->ts),
 574                         abs_msec, abs_usec,
 575                         rel_msec, rel_usec);
 576
 577         } else if (verbose && !in_ns) {
 578                 trace_seq_printf(
 579                         s, "[%016llx] %lld (+%lld): ",
 580                         iter->ts, abs_ts, rel_ts);
 581
 582         } else if (!verbose && in_ns) {
 583                 trace_seq_printf(
 584                         s, " %4lldus%c: ",
 585                         abs_ts,
 586                         trace_find_mark(rel_ts * NSEC_PER_USEC));
 587
 588         } else { /* !verbose && !in_ns */
 589                 trace_seq_printf(s, " %4lld: ", abs_ts);
 590         }
 591
 592         return !trace_seq_has_overflowed(s);
 593 }
 594
 595 static void trace_print_time(struct trace_seq *s, struct trace_iterator *iter,
 596                              unsigned long long ts)
 597 {
 598         unsigned long secs, usec_rem;
 599         unsigned long long t;
 600
 601         if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) {
 602                 t = ns2usecs(ts);
 603                 usec_rem = do_div(t, USEC_PER_SEC);
 604                 secs = (unsigned long)t;
 605                 trace_seq_printf(s, " %5lu.%06lu", secs, usec_rem);
 606         } else
 607                 trace_seq_printf(s, " %12llu", ts);
 608 }
 609
 610 int trace_print_context(struct trace_iterator *iter)
 611 {
 612         struct trace_array *tr = iter->tr;
 613         struct trace_seq *s = &iter->seq;
 614         struct trace_entry *entry = iter->ent;
 615         char comm[TASK_COMM_LEN];
 616
 617         trace_find_cmdline(entry->pid, comm);
 618
 619         trace_seq_printf(s, "%16s-%-7d ", comm, entry->pid);
 620
 621         if (tr->trace_flags & TRACE_ITER_RECORD_TGID) {
 622                 unsigned int tgid = trace_find_tgid(entry->pid);
 623
 624                 if (!tgid)
 625                         trace_seq_printf(s, "(-------) ");
 626                 else
 627                         trace_seq_printf(s, "(%7d) ", tgid);
 628         }
 629
 630         trace_seq_printf(s, "[%03d] ", iter->cpu);
 631
 632         if (tr->trace_flags & TRACE_ITER_IRQ_INFO)
 633                 trace_print_lat_fmt(s, entry);
 634
 635         trace_print_time(s, iter, iter->ts);
 636         trace_seq_puts(s, ": ");
 637
 638         return !trace_seq_has_overflowed(s);
 639 }
 640
 641 int trace_print_lat_context(struct trace_iterator *iter)
 642 {
 643         struct trace_entry *entry, *next_entry;
 644         struct trace_array *tr = iter->tr;
 645         struct trace_seq *s = &iter->seq;
 646         unsigned long verbose = (tr->trace_flags & TRACE_ITER_VERBOSE);
 647         u64 next_ts;
 648
 649         next_entry = trace_find_next_entry(iter, NULL, &next_ts);
 650         if (!next_entry)
 651                 next_ts = iter->ts;
 652
 653         /* trace_find_next_entry() may change iter->ent */
 654         entry = iter->ent;
 655
 656         if (verbose) {
 657                 char comm[TASK_COMM_LEN];
 658
 659                 trace_find_cmdline(entry->pid, comm);
 660
 661                 trace_seq_printf(
 662                         s, "%16s %7d %3d %d %08x %08lx ",
 663                         comm, entry->pid, iter->cpu, entry->flags,
 664                         entry->preempt_count & 0xf, iter->idx);
 665         } else {
 666                 lat_print_generic(s, entry, iter->cpu);
 667         }
 668
 669         lat_print_timestamp(iter, next_ts);
 670
 671         return !trace_seq_has_overflowed(s);
 672 }
 673
 674 /**
 675  * ftrace_find_event - find a registered event
 676  * @type: the type of event to look for
 677  *
 678  * Returns an event of type @type otherwise NULL
 679  * Called with trace_event_read_lock() held.
 680  */
 681 struct trace_event *ftrace_find_event(int type)
 682 {
 683         struct trace_event *event;
 684         unsigned key;
 685
 686         key = type & (EVENT_HASHSIZE - 1);
 687
 688         hlist_for_each_entry(event, &event_hash[key], node) {
 689                 if (event->type == type)
 690                         return event;
 691         }
 692
 693         return NULL;
 694 }
 695
 696 static LIST_HEAD(ftrace_event_list);
 697
 698 static int trace_search_list(struct list_head **list)
 699 {
 700         struct trace_event *e;
 701         int next = __TRACE_LAST_TYPE;
 702
 703         if (list_empty(&ftrace_event_list)) {
 704                 *list = &ftrace_event_list;
 705                 return next;
 706         }
 707
 708         /*
 709          * We used up all possible max events,
 710          * lets see if somebody freed one.
 711          */
 712         list_for_each_entry(e, &ftrace_event_list, list) {
 713                 if (e->type != next)
 714                         break;
 715                 next++;
 716         }
 717
 718         /* Did we used up all 65 thousand events??? */
 719         if (next > TRACE_EVENT_TYPE_MAX)
 720                 return 0;
 721
 722         *list = &e->list;
 723         return next;
 724 }
 725
 726 void trace_event_read_lock(void)
 727 {
 728         down_read(&trace_event_sem);
 729 }
 730
 731 void trace_event_read_unlock(void)
 732 {
 733         up_read(&trace_event_sem);
 734 }
 735
 736 /**
 737  * register_trace_event - register output for an event type
 738  * @event: the event type to register
 739  *
 740  * Event types are stored in a hash and this hash is used to
 741  * find a way to print an event. If the @event->type is set
 742  * then it will use that type, otherwise it will assign a
 743  * type to use.
 744  *
 745  * If you assign your own type, please make sure it is added
 746  * to the trace_type enum in trace.h, to avoid collisions
 747  * with the dynamic types.
 748  *
 749  * Returns the event type number or zero on error.
 750  */
 751 int register_trace_event(struct trace_event *event)
 752 {
 753         unsigned key;
 754         int ret = 0;
 755
 756         down_write(&trace_event_sem);
 757
 758         if (WARN_ON(!event))
 759                 goto out;
 760
 761         if (WARN_ON(!event->funcs))
 762                 goto out;
 763
 764         INIT_LIST_HEAD(&event->list);
 765
 766         if (!event->type) {
 767                 struct list_head *list = NULL;
 768
 769                 if (next_event_type > TRACE_EVENT_TYPE_MAX) {
 770
 771                         event->type = trace_search_list(&list);
 772                         if (!event->type)
 773                                 goto out;
 774
 775                 } else {
 776
 777                         event->type = next_event_type++;
 778                         list = &ftrace_event_list;
 779                 }
 780
 781                 if (WARN_ON(ftrace_find_event(event->type)))
 782                         goto out;
 783
 784                 list_add_tail(&event->list, list);
 785
 786         } else if (event->type > __TRACE_LAST_TYPE) {
 787                 printk(KERN_WARNING "Need to add type to trace.h\n");
 788                 WARN_ON(1);
 789                 goto out;
 790         } else {
 791                 /* Is this event already used */
 792                 if (ftrace_find_event(event->type))
 793                         goto out;
 794         }
 795
 796         if (event->funcs->trace == NULL)
 797                 event->funcs->trace = trace_nop_print;
 798         if (event->funcs->raw == NULL)
 799                 event->funcs->raw = trace_nop_print;
 800         if (event->funcs->hex == NULL)
 801                 event->funcs->hex = trace_nop_print;
 802         if (event->funcs->binary == NULL)
 803                 event->funcs->binary = trace_nop_print;
 804
 805         key = event->type & (EVENT_HASHSIZE - 1);
 806
 807         hlist_add_head(&event->node, &event_hash[key]);
 808
 809         ret = event->type;
 810  out:
 811         up_write(&trace_event_sem);
 812
 813         return ret;
 814 }
 815 EXPORT_SYMBOL_GPL(register_trace_event);
 816
 817 /*
 818  * Used by module code with the trace_event_sem held for write.
 819  */
 820 int __unregister_trace_event(struct trace_event *event)
 821 {
 822         hlist_del(&event->node);
 823         list_del(&event->list);
 824         return 0;
 825 }
 826
 827 /**
 828  * unregister_trace_event - remove a no longer used event
 829  * @event: the event to remove
 830  */
 831 int unregister_trace_event(struct trace_event *event)
 832 {
 833         down_write(&trace_event_sem);
 834         __unregister_trace_event(event);
 835         up_write(&trace_event_sem);
 836
 837         return 0;
 838 }
 839 EXPORT_SYMBOL_GPL(unregister_trace_event);
 840
 841 /*
 842  * Standard events
 843  */
 844
 845 enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags,
 846                                   struct trace_event *event)
 847 {
 848         trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type);
 849
 850         return trace_handle_return(&iter->seq);
 851 }
 852
 853 static void print_fn_trace(struct trace_seq *s, unsigned long ip,
 854                            unsigned long parent_ip, int flags)
 855 {
 856         seq_print_ip_sym(s, ip, flags);
 857
 858         if ((flags & TRACE_ITER_PRINT_PARENT) && parent_ip) {
 859                 trace_seq_puts(s, " <-");
 860                 seq_print_ip_sym(s, parent_ip, flags);
 861         }
 862 }
 863
 864 /* TRACE_FN */
 865 static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags,
 866                                         struct trace_event *event)
 867 {
 868         struct ftrace_entry *field;
 869         struct trace_seq *s = &iter->seq;
 870
 871         trace_assign_type(field, iter->ent);
 872
 873         print_fn_trace(s, field->ip, field->parent_ip, flags);
 874         trace_seq_putc(s, '\n');
 875
 876         return trace_handle_return(s);
 877 }
 878
 879 static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags,
 880                                       struct trace_event *event)
 881 {
 882         struct ftrace_entry *field;
 883
 884         trace_assign_type(field, iter->ent);
 885
 886         trace_seq_printf(&iter->seq, "%lx %lx\n",
 887                          field->ip,
 888                          field->parent_ip);
 889
 890         return trace_handle_return(&iter->seq);
 891 }
 892
 893 static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags,
 894                                       struct trace_event *event)
 895 {
 896         struct ftrace_entry *field;
 897         struct trace_seq *s = &iter->seq;
 898
 899         trace_assign_type(field, iter->ent);
 900
 901         SEQ_PUT_HEX_FIELD(s, field->ip);
 902         SEQ_PUT_HEX_FIELD(s, field->parent_ip);
 903
 904         return trace_handle_return(s);
 905 }
 906
 907 static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags,
 908                                       struct trace_event *event)
 909 {
 910         struct ftrace_entry *field;
 911         struct trace_seq *s = &iter->seq;
 912
 913         trace_assign_type(field, iter->ent);
 914
 915         SEQ_PUT_FIELD(s, field->ip);
 916         SEQ_PUT_FIELD(s, field->parent_ip);
 917
 918         return trace_handle_return(s);
 919 }
 920
 921 static struct trace_event_functions trace_fn_funcs = {
 922         .trace          = trace_fn_trace,
 923         .raw            = trace_fn_raw,
 924         .hex            = trace_fn_hex,
 925         .binary         = trace_fn_bin,
 926 };
 927
 928 static struct trace_event trace_fn_event = {
 929         .type           = TRACE_FN,
 930         .funcs          = &trace_fn_funcs,
 931 };
 932
 933 /* TRACE_CTX an TRACE_WAKE */
 934 static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
 935                                              char *delim)
 936 {
 937         struct ctx_switch_entry *field;
 938         char comm[TASK_COMM_LEN];
 939         int S, T;
 940
 941
 942         trace_assign_type(field, iter->ent);
 943
 944         T = task_index_to_char(field->next_state);
 945         S = task_index_to_char(field->prev_state);
 946         trace_find_cmdline(field->next_pid, comm);
 947         trace_seq_printf(&iter->seq,
 948                          " %7d:%3d:%c %s [%03d] %7d:%3d:%c %s\n",
 949                          field->prev_pid,
 950                          field->prev_prio,
 951                          S, delim,
 952                          field->next_cpu,
 953                          field->next_pid,
 954                          field->next_prio,
 955                          T, comm);
 956
 957         return trace_handle_return(&iter->seq);
 958 }
 959
 960 static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags,
 961                                          struct trace_event *event)
 962 {
 963         return trace_ctxwake_print(iter, "==>");
 964 }
 965
 966 static enum print_line_t trace_wake_print(struct trace_iterator *iter,
 967                                           int flags, struct trace_event *event)
 968 {
 969         return trace_ctxwake_print(iter, "  +");
 970 }
 971
 972 static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
 973 {
 974         struct ctx_switch_entry *field;
 975         int T;
 976
 977         trace_assign_type(field, iter->ent);
 978
 979         if (!S)
 980                 S = task_index_to_char(field->prev_state);
 981         T = task_index_to_char(field->next_state);
 982         trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n",
 983                          field->prev_pid,
 984                          field->prev_prio,
 985                          S,
 986                          field->next_cpu,
 987                          field->next_pid,
 988                          field->next_prio,
 989                          T);
 990
 991         return trace_handle_return(&iter->seq);
 992 }
 993
 994 static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags,
 995                                        struct trace_event *event)
 996 {
 997         return trace_ctxwake_raw(iter, 0);
 998 }
 999
1000 static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags,
1001                                         struct trace_event *event)
1002 {
1003         return trace_ctxwake_raw(iter, '+');
1004 }
1005
1006
1007 static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
1008 {
1009         struct ctx_switch_entry *field;
1010         struct trace_seq *s = &iter->seq;
1011         int T;
1012
1013         trace_assign_type(field, iter->ent);
1014
1015         if (!S)
1016                 S = task_index_to_char(field->prev_state);
1017         T = task_index_to_char(field->next_state);
1018
1019         SEQ_PUT_HEX_FIELD(s, field->prev_pid);
1020         SEQ_PUT_HEX_FIELD(s, field->prev_prio);
1021         SEQ_PUT_HEX_FIELD(s, S);
1022         SEQ_PUT_HEX_FIELD(s, field->next_cpu);
1023         SEQ_PUT_HEX_FIELD(s, field->next_pid);
1024         SEQ_PUT_HEX_FIELD(s, field->next_prio);
1025         SEQ_PUT_HEX_FIELD(s, T);
1026
1027         return trace_handle_return(s);
1028 }
1029
1030 static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags,
1031                                        struct trace_event *event)
1032 {
1033         return trace_ctxwake_hex(iter, 0);
1034 }
1035
1036 static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags,
1037                                         struct trace_event *event)
1038 {
1039         return trace_ctxwake_hex(iter, '+');
1040 }
1041
1042 static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
1043                                            int flags, struct trace_event *event)
1044 {
1045         struct ctx_switch_entry *field;
1046         struct trace_seq *s = &iter->seq;
1047
1048         trace_assign_type(field, iter->ent);
1049
1050         SEQ_PUT_FIELD(s, field->prev_pid);
1051         SEQ_PUT_FIELD(s, field->prev_prio);
1052         SEQ_PUT_FIELD(s, field->prev_state);
1053         SEQ_PUT_FIELD(s, field->next_cpu);
1054         SEQ_PUT_FIELD(s, field->next_pid);
1055         SEQ_PUT_FIELD(s, field->next_prio);
1056         SEQ_PUT_FIELD(s, field->next_state);
1057
1058         return trace_handle_return(s);
1059 }
1060
1061 static struct trace_event_functions trace_ctx_funcs = {
1062         .trace          = trace_ctx_print,
1063         .raw            = trace_ctx_raw,
1064         .hex            = trace_ctx_hex,
1065         .binary         = trace_ctxwake_bin,
1066 };
1067
1068 static struct trace_event trace_ctx_event = {
1069         .type           = TRACE_CTX,
1070         .funcs          = &trace_ctx_funcs,
1071 };
1072
1073 static struct trace_event_functions trace_wake_funcs = {
1074         .trace          = trace_wake_print,
1075         .raw            = trace_wake_raw,
1076         .hex            = trace_wake_hex,
1077         .binary         = trace_ctxwake_bin,
1078 };
1079
1080 static struct trace_event trace_wake_event = {
1081         .type           = TRACE_WAKE,
1082         .funcs          = &trace_wake_funcs,
1083 };
1084
1085 /* TRACE_STACK */
1086
1087 static enum print_line_t trace_stack_print(struct trace_iterator *iter,
1088                                            int flags, struct trace_event *event)
1089 {
1090         struct stack_entry *field;
1091         struct trace_seq *s = &iter->seq;
1092         unsigned long *p;
1093         unsigned long *end;
1094
1095         trace_assign_type(field, iter->ent);
1096         end = (unsigned long *)((long)iter->ent + iter->ent_size);
1097
1098         trace_seq_puts(s, "<stack trace>\n");
1099
1100         for (p = field->caller; p && p < end && *p != ULONG_MAX; p++) {
1101
1102                 if (trace_seq_has_overflowed(s))
1103                         break;
1104
1105                 trace_seq_puts(s, " => ");
1106                 seq_print_ip_sym(s, *p, flags);
1107                 trace_seq_putc(s, '\n');
1108         }
1109
1110         return trace_handle_return(s);
1111 }
1112
1113 static struct trace_event_functions trace_stack_funcs = {
1114         .trace          = trace_stack_print,
1115 };
1116
1117 static struct trace_event trace_stack_event = {
1118         .type           = TRACE_STACK,
1119         .funcs          = &trace_stack_funcs,
1120 };
1121
1122 /* TRACE_USER_STACK */
1123 static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
1124                                                 int flags, struct trace_event *event)
1125 {
1126         struct trace_array *tr = iter->tr;
1127         struct userstack_entry *field;
1128         struct trace_seq *s = &iter->seq;
1129         struct mm_struct *mm = NULL;
1130         unsigned int i;
1131
1132         trace_assign_type(field, iter->ent);
1133
1134         trace_seq_puts(s, "<user stack trace>\n");
1135
1136         if (tr->trace_flags & TRACE_ITER_SYM_USEROBJ) {
1137                 struct task_struct *task;
1138                 /*
1139                  * we do the lookup on the thread group leader,
1140                  * since individual threads might have already quit!
1141                  */
1142                 rcu_read_lock();
1143                 task = find_task_by_vpid(field->tgid);
1144                 if (task)
1145                         mm = get_task_mm(task);
1146                 rcu_read_unlock();
1147         }
1148
1149         for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
1150                 unsigned long ip = field->caller[i];
1151
1152                 if (!ip || trace_seq_has_overflowed(s))
1153                         break;
1154
1155                 trace_seq_puts(s, " => ");
1156                 seq_print_user_ip(s, mm, ip, flags);
1157                 trace_seq_putc(s, '\n');
1158         }
1159
1160         if (mm)
1161                 mmput(mm);
1162
1163         return trace_handle_return(s);
1164 }
1165
1166 static struct trace_event_functions trace_user_stack_funcs = {
1167         .trace          = trace_user_stack_print,
1168 };
1169
1170 static struct trace_event trace_user_stack_event = {
1171         .type           = TRACE_USER_STACK,
1172         .funcs          = &trace_user_stack_funcs,
1173 };
1174
1175 /* TRACE_HWLAT */
1176 static enum print_line_t
1177 trace_hwlat_print(struct trace_iterator *iter, int flags,
1178                   struct trace_event *event)
1179 {
1180         struct trace_entry *entry = iter->ent;
1181         struct trace_seq *s = &iter->seq;
1182         struct hwlat_entry *field;
1183
1184         trace_assign_type(field, entry);
1185
1186         trace_seq_printf(s, "#%-5u inner/outer(us): %4llu/%-5llu ts:%lld.%09ld count:%d",
1187                          field->seqnum,
1188                          field->duration,
1189                          field->outer_duration,
1190                          (long long)field->timestamp.tv_sec,
1191                          field->timestamp.tv_nsec, field->count);
1192
1193         if (field->nmi_count) {
1194                 /*
1195                  * The generic sched_clock() is not NMI safe, thus
1196                  * we only record the count and not the time.
1197                  */
1198                 if (!IS_ENABLED(CONFIG_GENERIC_SCHED_CLOCK))
1199                         trace_seq_printf(s, " nmi-total:%llu",
1200                                          field->nmi_total_ts);
1201                 trace_seq_printf(s, " nmi-count:%u",
1202                                  field->nmi_count);
1203         }
1204
1205         trace_seq_putc(s, '\n');
1206
1207         return trace_handle_return(s);
1208 }
1209
1210 static enum print_line_t
1211 trace_hwlat_raw(struct trace_iterator *iter, int flags,
1212                 struct trace_event *event)
1213 {
1214         struct hwlat_entry *field;
1215         struct trace_seq *s = &iter->seq;
1216
1217         trace_assign_type(field, iter->ent);
1218
1219         trace_seq_printf(s, "%llu %lld %lld %09ld %u\n",
1220                          field->duration,
1221                          field->outer_duration,
1222                          (long long)field->timestamp.tv_sec,
1223                          field->timestamp.tv_nsec,
1224                          field->seqnum);
1225
1226         return trace_handle_return(s);
1227 }
1228
1229 static struct trace_event_functions trace_hwlat_funcs = {
1230         .trace          = trace_hwlat_print,
1231         .raw            = trace_hwlat_raw,
1232 };
1233
1234 static struct trace_event trace_hwlat_event = {
1235         .type           = TRACE_HWLAT,
1236         .funcs          = &trace_hwlat_funcs,
1237 };
1238
1239 /* TRACE_OSNOISE */
1240 static enum print_line_t
1241 trace_osnoise_print(struct trace_iterator *iter, int flags,
1242                     struct trace_event *event)
1243 {
1244         struct trace_entry *entry = iter->ent;
1245         struct trace_seq *s = &iter->seq;
1246         struct osnoise_entry *field;
1247         u64 ratio, ratio_dec;
1248         u64 net_runtime;
1249
1250         trace_assign_type(field, entry);
1251
1252         /*
1253          * compute the available % of cpu time.
1254          */
1255         net_runtime = field->runtime - field->noise;
1256         ratio = net_runtime * 10000000;
1257         do_div(ratio, field->runtime);
1258         ratio_dec = do_div(ratio, 100000);
1259
1260         trace_seq_printf(s, "%llu %10llu %3llu.%05llu %7llu",
1261                          field->runtime,
1262                          field->noise,
1263                          ratio, ratio_dec,
1264                          field->max_sample);
1265
1266         trace_seq_printf(s, " %6u", field->hw_count);
1267         trace_seq_printf(s, " %6u", field->nmi_count);
1268         trace_seq_printf(s, " %6u", field->irq_count);
1269         trace_seq_printf(s, " %6u", field->softirq_count);
1270         trace_seq_printf(s, " %6u", field->thread_count);
1271
1272         trace_seq_putc(s, '\n');
1273
1274         return trace_handle_return(s);
1275 }
1276
1277 static enum print_line_t
1278 trace_osnoise_raw(struct trace_iterator *iter, int flags,
1279                   struct trace_event *event)
1280 {
1281         struct osnoise_entry *field;
1282         struct trace_seq *s = &iter->seq;
1283
1284         trace_assign_type(field, iter->ent);
1285
1286         trace_seq_printf(s, "%lld %llu %llu %u %u %u %u %u\n",
1287                          field->runtime,
1288                          field->noise,
1289                          field->max_sample,
1290                          field->hw_count,
1291                          field->nmi_count,
1292                          field->irq_count,
1293                          field->softirq_count,
1294                          field->thread_count);
1295
1296         return trace_handle_return(s);
1297 }
1298
1299 static struct trace_event_functions trace_osnoise_funcs = {
1300         .trace          = trace_osnoise_print,
1301         .raw            = trace_osnoise_raw,
1302 };
1303
1304 static struct trace_event trace_osnoise_event = {
1305         .type           = TRACE_OSNOISE,
1306         .funcs          = &trace_osnoise_funcs,
1307 };
1308
1309 /* TRACE_TIMERLAT */
1310 static enum print_line_t
1311 trace_timerlat_print(struct trace_iterator *iter, int flags,
1312                      struct trace_event *event)
1313 {
1314         struct trace_entry *entry = iter->ent;
1315         struct trace_seq *s = &iter->seq;
1316         struct timerlat_entry *field;
1317
1318         trace_assign_type(field, entry);
1319
1320         trace_seq_printf(s, "#%-5u context %6s timer_latency %9llu ns\n",
1321                          field->seqnum,
1322                          field->context ? "thread" : "irq",
1323                          field->timer_latency);
1324
1325         return trace_handle_return(s);
1326 }
1327
1328 static enum print_line_t
1329 trace_timerlat_raw(struct trace_iterator *iter, int flags,
1330                    struct trace_event *event)
1331 {
1332         struct timerlat_entry *field;
1333         struct trace_seq *s = &iter->seq;
1334
1335         trace_assign_type(field, iter->ent);
1336
1337         trace_seq_printf(s, "%u %d %llu\n",
1338                          field->seqnum,
1339                          field->context,
1340                          field->timer_latency);
1341
1342         return trace_handle_return(s);
1343 }
1344
1345 static struct trace_event_functions trace_timerlat_funcs = {
1346         .trace          = trace_timerlat_print,
1347         .raw            = trace_timerlat_raw,
1348 };
1349
1350 static struct trace_event trace_timerlat_event = {
1351         .type           = TRACE_TIMERLAT,
1352         .funcs          = &trace_timerlat_funcs,
1353 };
1354
1355 /* TRACE_BPUTS */
1356 static enum print_line_t
1357 trace_bputs_print(struct trace_iterator *iter, int flags,
1358                    struct trace_event *event)
1359 {
1360         struct trace_entry *entry = iter->ent;
1361         struct trace_seq *s = &iter->seq;
1362         struct bputs_entry *field;
1363
1364         trace_assign_type(field, entry);
1365
1366         seq_print_ip_sym(s, field->ip, flags);
1367         trace_seq_puts(s, ": ");
1368         trace_seq_puts(s, field->str);
1369
1370         return trace_handle_return(s);
1371 }
1372
1373
1374 static enum print_line_t
1375 trace_bputs_raw(struct trace_iterator *iter, int flags,
1376                 struct trace_event *event)
1377 {
1378         struct bputs_entry *field;
1379         struct trace_seq *s = &iter->seq;
1380
1381         trace_assign_type(field, iter->ent);
1382
1383         trace_seq_printf(s, ": %lx : ", field->ip);
1384         trace_seq_puts(s, field->str);
1385
1386         return trace_handle_return(s);
1387 }
1388
1389 static struct trace_event_functions trace_bputs_funcs = {
1390         .trace          = trace_bputs_print,
1391         .raw            = trace_bputs_raw,
1392 };
1393
1394 static struct trace_event trace_bputs_event = {
1395         .type           = TRACE_BPUTS,
1396         .funcs          = &trace_bputs_funcs,
1397 };
1398
1399 /* TRACE_BPRINT */
1400 static enum print_line_t
1401 trace_bprint_print(struct trace_iterator *iter, int flags,
1402                    struct trace_event *event)
1403 {
1404         struct trace_entry *entry = iter->ent;
1405         struct trace_seq *s = &iter->seq;
1406         struct bprint_entry *field;
1407
1408         trace_assign_type(field, entry);
1409
1410         seq_print_ip_sym(s, field->ip, flags);
1411         trace_seq_puts(s, ": ");
1412         trace_seq_bprintf(s, field->fmt, field->buf);
1413
1414         return trace_handle_return(s);
1415 }
1416
1417
1418 static enum print_line_t
1419 trace_bprint_raw(struct trace_iterator *iter, int flags,
1420                  struct trace_event *event)
1421 {
1422         struct bprint_entry *field;
1423         struct trace_seq *s = &iter->seq;
1424
1425         trace_assign_type(field, iter->ent);
1426
1427         trace_seq_printf(s, ": %lx : ", field->ip);
1428         trace_seq_bprintf(s, field->fmt, field->buf);
1429
1430         return trace_handle_return(s);
1431 }
1432
1433 static struct trace_event_functions trace_bprint_funcs = {
1434         .trace          = trace_bprint_print,
1435         .raw            = trace_bprint_raw,
1436 };
1437
1438 static struct trace_event trace_bprint_event = {
1439         .type           = TRACE_BPRINT,
1440         .funcs          = &trace_bprint_funcs,
1441 };
1442
1443 /* TRACE_PRINT */
1444 static enum print_line_t trace_print_print(struct trace_iterator *iter,
1445                                            int flags, struct trace_event *event)
1446 {
1447         struct print_entry *field;
1448         struct trace_seq *s = &iter->seq;
1449
1450         trace_assign_type(field, iter->ent);
1451
1452         seq_print_ip_sym(s, field->ip, flags);
1453         trace_seq_printf(s, ": %s", field->buf);
1454
1455         return trace_handle_return(s);
1456 }
1457
1458 static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags,
1459                                          struct trace_event *event)
1460 {
1461         struct print_entry *field;
1462
1463         trace_assign_type(field, iter->ent);
1464
1465         trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf);
1466
1467         return trace_handle_return(&iter->seq);
1468 }
1469
1470 static struct trace_event_functions trace_print_funcs = {
1471         .trace          = trace_print_print,
1472         .raw            = trace_print_raw,
1473 };
1474
1475 static struct trace_event trace_print_event = {
1476         .type           = TRACE_PRINT,
1477         .funcs          = &trace_print_funcs,
1478 };
1479
1480 static enum print_line_t trace_raw_data(struct trace_iterator *iter, int flags,
1481                                          struct trace_event *event)
1482 {
1483         struct raw_data_entry *field;
1484         int i;
1485
1486         trace_assign_type(field, iter->ent);
1487
1488         trace_seq_printf(&iter->seq, "# %x buf:", field->id);
1489
1490         for (i = 0; i < iter->ent_size - offsetof(struct raw_data_entry, buf); i++)
1491                 trace_seq_printf(&iter->seq, " %02x",
1492                                  (unsigned char)field->buf[i]);
1493
1494         trace_seq_putc(&iter->seq, '\n');
1495
1496         return trace_handle_return(&iter->seq);
1497 }
1498
1499 static struct trace_event_functions trace_raw_data_funcs = {
1500         .trace          = trace_raw_data,
1501         .raw            = trace_raw_data,
1502 };
1503
1504 static struct trace_event trace_raw_data_event = {
1505         .type           = TRACE_RAW_DATA,
1506         .funcs          = &trace_raw_data_funcs,
1507 };
1508
1509 static enum print_line_t
1510 trace_func_repeats_raw(struct trace_iterator *iter, int flags,
1511                          struct trace_event *event)
1512 {
1513         struct func_repeats_entry *field;
1514         struct trace_seq *s = &iter->seq;
1515
1516         trace_assign_type(field, iter->ent);
1517
1518         trace_seq_printf(s, "%lu %lu %u %llu\n",
1519                          field->ip,
1520                          field->parent_ip,
1521                          field->count,
1522                          FUNC_REPEATS_GET_DELTA_TS(field));
1523
1524         return trace_handle_return(s);
1525 }
1526
1527 static enum print_line_t
1528 trace_func_repeats_print(struct trace_iterator *iter, int flags,
1529                          struct trace_event *event)
1530 {
1531         struct func_repeats_entry *field;
1532         struct trace_seq *s = &iter->seq;
1533
1534         trace_assign_type(field, iter->ent);
1535
1536         print_fn_trace(s, field->ip, field->parent_ip, flags);
1537         trace_seq_printf(s, " (repeats: %u, last_ts:", field->count);
1538         trace_print_time(s, iter,
1539                          iter->ts - FUNC_REPEATS_GET_DELTA_TS(field));
1540         trace_seq_puts(s, ")\n");
1541
1542         return trace_handle_return(s);
1543 }
1544
1545 static struct trace_event_functions trace_func_repeats_funcs = {
1546         .trace          = trace_func_repeats_print,
1547         .raw            = trace_func_repeats_raw,
1548 };
1549
1550 static struct trace_event trace_func_repeats_event = {
1551         .type           = TRACE_FUNC_REPEATS,
1552         .funcs          = &trace_func_repeats_funcs,
1553 };
1554
1555 static struct trace_event *events[] __initdata = {
1556         &trace_fn_event,
1557         &trace_ctx_event,
1558         &trace_wake_event,
1559         &trace_stack_event,
1560         &trace_user_stack_event,
1561         &trace_bputs_event,
1562         &trace_bprint_event,
1563         &trace_print_event,
1564         &trace_hwlat_event,
1565         &trace_osnoise_event,
1566         &trace_timerlat_event,
1567         &trace_raw_data_event,
1568         &trace_func_repeats_event,
1569         NULL
1570 };
1571
1572 __init static int init_events(void)
1573 {
1574         struct trace_event *event;
1575         int i, ret;
1576
1577         for (i = 0; events[i]; i++) {
1578                 event = events[i];
1579
1580                 ret = register_trace_event(event);
1581                 if (!ret) {
1582                         printk(KERN_WARNING "event %d failed to register\n",
1583                                event->type);
1584                         WARN_ON_ONCE(1);
1585                 }
1586         }
1587
1588         return 0;
1589 }
1590 early_initcall(init_events);