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