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/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                 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 __printf(3, 0)
 326 int trace_output_raw(struct trace_iterator *iter, char *name,
 327                      char *fmt, va_list ap)
 328 {
 329         struct trace_seq *s = &iter->seq;
 330
 331         trace_seq_printf(s, "%s: ", name);
 332         trace_seq_vprintf(s, trace_event_format(iter, fmt), ap);
 333
 334         return trace_handle_return(s);
 335 }
 336
 337 int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...)
 338 {
 339         va_list ap;
 340         int ret;
 341
 342         va_start(ap, fmt);
 343         ret = trace_output_raw(iter, name, fmt, ap);
 344         va_end(ap);
 345
 346         return ret;
 347 }
 348 EXPORT_SYMBOL_GPL(trace_output_call);
 349
 350 static inline const char *kretprobed(const char *name, unsigned long addr)
 351 {
 352         if (is_kretprobe_trampoline(addr))
 353                 return "[unknown/kretprobe'd]";
 354         return name;
 355 }
 356
 357 void
 358 trace_seq_print_sym(struct trace_seq *s, unsigned long address, bool offset)
 359 {
 360 #ifdef CONFIG_KALLSYMS
 361         char str[KSYM_SYMBOL_LEN];
 362         const char *name;
 363
 364         if (offset)
 365                 sprint_symbol(str, address);
 366         else
 367                 kallsyms_lookup(address, NULL, NULL, NULL, str);
 368         name = kretprobed(str, address);
 369
 370         if (name && strlen(name)) {
 371                 trace_seq_puts(s, name);
 372                 return;
 373         }
 374 #endif
 375         trace_seq_printf(s, "0x%08lx", address);
 376 }
 377
 378 #ifndef CONFIG_64BIT
 379 # define IP_FMT "%08lx"
 380 #else
 381 # define IP_FMT "%016lx"
 382 #endif
 383
 384 static int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
 385                              unsigned long ip, unsigned long sym_flags)
 386 {
 387         struct file *file = NULL;
 388         unsigned long vmstart = 0;
 389         int ret = 1;
 390
 391         if (s->full)
 392                 return 0;
 393
 394         if (mm) {
 395                 const struct vm_area_struct *vma;
 396
 397                 mmap_read_lock(mm);
 398                 vma = find_vma(mm, ip);
 399                 if (vma) {
 400                         file = vma->vm_file;
 401                         vmstart = vma->vm_start;
 402                 }
 403                 if (file) {
 404                         ret = trace_seq_path(s, &file->f_path);
 405                         if (ret)
 406                                 trace_seq_printf(s, "[+0x%lx]",
 407                                                  ip - vmstart);
 408                 }
 409                 mmap_read_unlock(mm);
 410         }
 411         if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file))
 412                 trace_seq_printf(s, " <" IP_FMT ">", ip);
 413         return !trace_seq_has_overflowed(s);
 414 }
 415
 416 int
 417 seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
 418 {
 419         if (!ip) {
 420                 trace_seq_putc(s, '0');
 421                 goto out;
 422         }
 423
 424         trace_seq_print_sym(s, ip, sym_flags & TRACE_ITER_SYM_OFFSET);
 425
 426         if (sym_flags & TRACE_ITER_SYM_ADDR)
 427                 trace_seq_printf(s, " <" IP_FMT ">", ip);
 428
 429  out:
 430         return !trace_seq_has_overflowed(s);
 431 }
 432
 433 /**
 434  * trace_print_lat_fmt - print the irq, preempt and lockdep fields
 435  * @s: trace seq struct to write to
 436  * @entry: The trace entry field from the ring buffer
 437  *
 438  * Prints the generic fields of irqs off, in hard or softirq, preempt
 439  * count.
 440  */
 441 int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
 442 {
 443         char hardsoft_irq;
 444         char need_resched;
 445         char irqs_off;
 446         int hardirq;
 447         int softirq;
 448         int bh_off;
 449         int nmi;
 450
 451         nmi = entry->flags & TRACE_FLAG_NMI;
 452         hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
 453         softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
 454         bh_off = entry->flags & TRACE_FLAG_BH_OFF;
 455
 456         irqs_off =
 457                 (entry->flags & TRACE_FLAG_IRQS_OFF && bh_off) ? 'D' :
 458                 (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
 459                 bh_off ? 'b' :
 460                 (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' :
 461                 '.';
 462
 463         switch (entry->flags & (TRACE_FLAG_NEED_RESCHED |
 464                                 TRACE_FLAG_PREEMPT_RESCHED)) {
 465         case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED:
 466                 need_resched = 'N';
 467                 break;
 468         case TRACE_FLAG_NEED_RESCHED:
 469                 need_resched = 'n';
 470                 break;
 471         case TRACE_FLAG_PREEMPT_RESCHED:
 472                 need_resched = 'p';
 473                 break;
 474         default:
 475                 need_resched = '.';
 476                 break;
 477         }
 478
 479         hardsoft_irq =
 480                 (nmi && hardirq)     ? 'Z' :
 481                 nmi                  ? 'z' :
 482                 (hardirq && softirq) ? 'H' :
 483                 hardirq              ? 'h' :
 484                 softirq              ? 's' :
 485                                        '.' ;
 486
 487         trace_seq_printf(s, "%c%c%c",
 488                          irqs_off, need_resched, hardsoft_irq);
 489
 490         if (entry->preempt_count & 0xf)
 491                 trace_seq_printf(s, "%x", entry->preempt_count & 0xf);
 492         else
 493                 trace_seq_putc(s, '.');
 494
 495         if (entry->preempt_count & 0xf0)
 496                 trace_seq_printf(s, "%x", entry->preempt_count >> 4);
 497         else
 498                 trace_seq_putc(s, '.');
 499
 500         return !trace_seq_has_overflowed(s);
 501 }
 502
 503 static int
 504 lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
 505 {
 506         char comm[TASK_COMM_LEN];
 507
 508         trace_find_cmdline(entry->pid, comm);
 509
 510         trace_seq_printf(s, "%8.8s-%-7d %3d",
 511                          comm, entry->pid, cpu);
 512
 513         return trace_print_lat_fmt(s, entry);
 514 }
 515
 516 #undef MARK
 517 #define MARK(v, s) {.val = v, .sym = s}
 518 /* trace overhead mark */
 519 static const struct trace_mark {
 520         unsigned long long      val; /* unit: nsec */
 521         char                    sym;
 522 } mark[] = {
 523         MARK(1000000000ULL      , '$'), /* 1 sec */
 524         MARK(100000000ULL       , '@'), /* 100 msec */
 525         MARK(10000000ULL        , '*'), /* 10 msec */
 526         MARK(1000000ULL         , '#'), /* 1000 usecs */
 527         MARK(100000ULL          , '!'), /* 100 usecs */
 528         MARK(10000ULL           , '+'), /* 10 usecs */
 529 };
 530 #undef MARK
 531
 532 char trace_find_mark(unsigned long long d)
 533 {
 534         int i;
 535         int size = ARRAY_SIZE(mark);
 536
 537         for (i = 0; i < size; i++) {
 538                 if (d > mark[i].val)
 539                         break;
 540         }
 541
 542         return (i == size) ? ' ' : mark[i].sym;
 543 }
 544
 545 static int
 546 lat_print_timestamp(struct trace_iterator *iter, u64 next_ts)
 547 {
 548         struct trace_array *tr = iter->tr;
 549         unsigned long verbose = tr->trace_flags & TRACE_ITER_VERBOSE;
 550         unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS;
 551         unsigned long long abs_ts = iter->ts - iter->array_buffer->time_start;
 552         unsigned long long rel_ts = next_ts - iter->ts;
 553         struct trace_seq *s = &iter->seq;
 554
 555         if (in_ns) {
 556                 abs_ts = ns2usecs(abs_ts);
 557                 rel_ts = ns2usecs(rel_ts);
 558         }
 559
 560         if (verbose && in_ns) {
 561                 unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC);
 562                 unsigned long abs_msec = (unsigned long)abs_ts;
 563                 unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC);
 564                 unsigned long rel_msec = (unsigned long)rel_ts;
 565
 566                 trace_seq_printf(
 567                         s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ",
 568                         ns2usecs(iter->ts),
 569                         abs_msec, abs_usec,
 570                         rel_msec, rel_usec);
 571
 572         } else if (verbose && !in_ns) {
 573                 trace_seq_printf(
 574                         s, "[%016llx] %lld (+%lld): ",
 575                         iter->ts, abs_ts, rel_ts);
 576
 577         } else if (!verbose && in_ns) {
 578                 trace_seq_printf(
 579                         s, " %4lldus%c: ",
 580                         abs_ts,
 581                         trace_find_mark(rel_ts * NSEC_PER_USEC));
 582
 583         } else { /* !verbose && !in_ns */
 584                 trace_seq_printf(s, " %4lld: ", abs_ts);
 585         }
 586
 587         return !trace_seq_has_overflowed(s);
 588 }
 589
 590 static void trace_print_time(struct trace_seq *s, struct trace_iterator *iter,
 591                              unsigned long long ts)
 592 {
 593         unsigned long secs, usec_rem;
 594         unsigned long long t;
 595
 596         if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) {
 597                 t = ns2usecs(ts);
 598                 usec_rem = do_div(t, USEC_PER_SEC);
 599                 secs = (unsigned long)t;
 600                 trace_seq_printf(s, " %5lu.%06lu", secs, usec_rem);
 601         } else
 602                 trace_seq_printf(s, " %12llu", ts);
 603 }
 604
 605 int trace_print_context(struct trace_iterator *iter)
 606 {
 607         struct trace_array *tr = iter->tr;
 608         struct trace_seq *s = &iter->seq;
 609         struct trace_entry *entry = iter->ent;
 610         char comm[TASK_COMM_LEN];
 611
 612         trace_find_cmdline(entry->pid, comm);
 613
 614         trace_seq_printf(s, "%16s-%-7d ", comm, entry->pid);
 615
 616         if (tr->trace_flags & TRACE_ITER_RECORD_TGID) {
 617                 unsigned int tgid = trace_find_tgid(entry->pid);
 618
 619                 if (!tgid)
 620                         trace_seq_printf(s, "(-------) ");
 621                 else
 622                         trace_seq_printf(s, "(%7d) ", tgid);
 623         }
 624
 625         trace_seq_printf(s, "[%03d] ", iter->cpu);
 626
 627         if (tr->trace_flags & TRACE_ITER_IRQ_INFO)
 628                 trace_print_lat_fmt(s, entry);
 629
 630         trace_print_time(s, iter, iter->ts);
 631         trace_seq_puts(s, ": ");
 632
 633         return !trace_seq_has_overflowed(s);
 634 }
 635
 636 int trace_print_lat_context(struct trace_iterator *iter)
 637 {
 638         struct trace_entry *entry, *next_entry;
 639         struct trace_array *tr = iter->tr;
 640         struct trace_seq *s = &iter->seq;
 641         unsigned long verbose = (tr->trace_flags & TRACE_ITER_VERBOSE);
 642         u64 next_ts;
 643
 644         next_entry = trace_find_next_entry(iter, NULL, &next_ts);
 645         if (!next_entry)
 646                 next_ts = iter->ts;
 647
 648         /* trace_find_next_entry() may change iter->ent */
 649         entry = iter->ent;
 650
 651         if (verbose) {
 652                 char comm[TASK_COMM_LEN];
 653
 654                 trace_find_cmdline(entry->pid, comm);
 655
 656                 trace_seq_printf(
 657                         s, "%16s %7d %3d %d %08x %08lx ",
 658                         comm, entry->pid, iter->cpu, entry->flags,
 659                         entry->preempt_count & 0xf, iter->idx);
 660         } else {
 661                 lat_print_generic(s, entry, iter->cpu);
 662         }
 663
 664         lat_print_timestamp(iter, next_ts);
 665
 666         return !trace_seq_has_overflowed(s);
 667 }
 668
 669 /**
 670  * ftrace_find_event - find a registered event
 671  * @type: the type of event to look for
 672  *
 673  * Returns an event of type @type otherwise NULL
 674  * Called with trace_event_read_lock() held.
 675  */
 676 struct trace_event *ftrace_find_event(int type)
 677 {
 678         struct trace_event *event;
 679         unsigned key;
 680
 681         key = type & (EVENT_HASHSIZE - 1);
 682
 683         hlist_for_each_entry(event, &event_hash[key], node) {
 684                 if (event->type == type)
 685                         return event;
 686         }
 687
 688         return NULL;
 689 }
 690
 691 static DEFINE_IDA(trace_event_ida);
 692
 693 static void free_trace_event_type(int type)
 694 {
 695         if (type >= __TRACE_LAST_TYPE)
 696                 ida_free(&trace_event_ida, type);
 697 }
 698
 699 static int alloc_trace_event_type(void)
 700 {
 701         int next;
 702
 703         /* Skip static defined type numbers */
 704         next = ida_alloc_range(&trace_event_ida, __TRACE_LAST_TYPE,
 705                                TRACE_EVENT_TYPE_MAX, GFP_KERNEL);
 706         if (next < 0)
 707                 return 0;
 708         return next;
 709 }
 710
 711 void trace_event_read_lock(void)
 712 {
 713         down_read(&trace_event_sem);
 714 }
 715
 716 void trace_event_read_unlock(void)
 717 {
 718         up_read(&trace_event_sem);
 719 }
 720
 721 /**
 722  * register_trace_event - register output for an event type
 723  * @event: the event type to register
 724  *
 725  * Event types are stored in a hash and this hash is used to
 726  * find a way to print an event. If the @event->type is set
 727  * then it will use that type, otherwise it will assign a
 728  * type to use.
 729  *
 730  * If you assign your own type, please make sure it is added
 731  * to the trace_type enum in trace.h, to avoid collisions
 732  * with the dynamic types.
 733  *
 734  * Returns the event type number or zero on error.
 735  */
 736 int register_trace_event(struct trace_event *event)
 737 {
 738         unsigned key;
 739         int ret = 0;
 740
 741         down_write(&trace_event_sem);
 742
 743         if (WARN_ON(!event))
 744                 goto out;
 745
 746         if (WARN_ON(!event->funcs))
 747                 goto out;
 748
 749         if (!event->type) {
 750                 event->type = alloc_trace_event_type();
 751                 if (!event->type)
 752                         goto out;
 753         } else if (WARN(event->type > __TRACE_LAST_TYPE,
 754                         "Need to add type to trace.h")) {
 755                 goto out;
 756         } else {
 757                 /* Is this event already used */
 758                 if (ftrace_find_event(event->type))
 759                         goto out;
 760         }
 761
 762         if (event->funcs->trace == NULL)
 763                 event->funcs->trace = trace_nop_print;
 764         if (event->funcs->raw == NULL)
 765                 event->funcs->raw = trace_nop_print;
 766         if (event->funcs->hex == NULL)
 767                 event->funcs->hex = trace_nop_print;
 768         if (event->funcs->binary == NULL)
 769                 event->funcs->binary = trace_nop_print;
 770
 771         key = event->type & (EVENT_HASHSIZE - 1);
 772
 773         hlist_add_head(&event->node, &event_hash[key]);
 774
 775         ret = event->type;
 776  out:
 777         up_write(&trace_event_sem);
 778
 779         return ret;
 780 }
 781 EXPORT_SYMBOL_GPL(register_trace_event);
 782
 783 /*
 784  * Used by module code with the trace_event_sem held for write.
 785  */
 786 int __unregister_trace_event(struct trace_event *event)
 787 {
 788         hlist_del(&event->node);
 789         free_trace_event_type(event->type);
 790         return 0;
 791 }
 792
 793 /**
 794  * unregister_trace_event - remove a no longer used event
 795  * @event: the event to remove
 796  */
 797 int unregister_trace_event(struct trace_event *event)
 798 {
 799         down_write(&trace_event_sem);
 800         __unregister_trace_event(event);
 801         up_write(&trace_event_sem);
 802
 803         return 0;
 804 }
 805 EXPORT_SYMBOL_GPL(unregister_trace_event);
 806
 807 /*
 808  * Standard events
 809  */
 810
 811 enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags,
 812                                   struct trace_event *event)
 813 {
 814         trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type);
 815
 816         return trace_handle_return(&iter->seq);
 817 }
 818
 819 static void print_fn_trace(struct trace_seq *s, unsigned long ip,
 820                            unsigned long parent_ip, int flags)
 821 {
 822         seq_print_ip_sym(s, ip, flags);
 823
 824         if ((flags & TRACE_ITER_PRINT_PARENT) && parent_ip) {
 825                 trace_seq_puts(s, " <-");
 826                 seq_print_ip_sym(s, parent_ip, flags);
 827         }
 828 }
 829
 830 /* TRACE_FN */
 831 static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags,
 832                                         struct trace_event *event)
 833 {
 834         struct ftrace_entry *field;
 835         struct trace_seq *s = &iter->seq;
 836
 837         trace_assign_type(field, iter->ent);
 838
 839         print_fn_trace(s, field->ip, field->parent_ip, flags);
 840         trace_seq_putc(s, '\n');
 841
 842         return trace_handle_return(s);
 843 }
 844
 845 static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags,
 846                                       struct trace_event *event)
 847 {
 848         struct ftrace_entry *field;
 849
 850         trace_assign_type(field, iter->ent);
 851
 852         trace_seq_printf(&iter->seq, "%lx %lx\n",
 853                          field->ip,
 854                          field->parent_ip);
 855
 856         return trace_handle_return(&iter->seq);
 857 }
 858
 859 static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags,
 860                                       struct trace_event *event)
 861 {
 862         struct ftrace_entry *field;
 863         struct trace_seq *s = &iter->seq;
 864
 865         trace_assign_type(field, iter->ent);
 866
 867         SEQ_PUT_HEX_FIELD(s, field->ip);
 868         SEQ_PUT_HEX_FIELD(s, field->parent_ip);
 869
 870         return trace_handle_return(s);
 871 }
 872
 873 static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags,
 874                                       struct trace_event *event)
 875 {
 876         struct ftrace_entry *field;
 877         struct trace_seq *s = &iter->seq;
 878
 879         trace_assign_type(field, iter->ent);
 880
 881         SEQ_PUT_FIELD(s, field->ip);
 882         SEQ_PUT_FIELD(s, field->parent_ip);
 883
 884         return trace_handle_return(s);
 885 }
 886
 887 static struct trace_event_functions trace_fn_funcs = {
 888         .trace          = trace_fn_trace,
 889         .raw            = trace_fn_raw,
 890         .hex            = trace_fn_hex,
 891         .binary         = trace_fn_bin,
 892 };
 893
 894 static struct trace_event trace_fn_event = {
 895         .type           = TRACE_FN,
 896         .funcs          = &trace_fn_funcs,
 897 };
 898
 899 /* TRACE_CTX an TRACE_WAKE */
 900 static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
 901                                              char *delim)
 902 {
 903         struct ctx_switch_entry *field;
 904         char comm[TASK_COMM_LEN];
 905         int S, T;
 906
 907
 908         trace_assign_type(field, iter->ent);
 909
 910         T = task_index_to_char(field->next_state);
 911         S = task_index_to_char(field->prev_state);
 912         trace_find_cmdline(field->next_pid, comm);
 913         trace_seq_printf(&iter->seq,
 914                          " %7d:%3d:%c %s [%03d] %7d:%3d:%c %s\n",
 915                          field->prev_pid,
 916                          field->prev_prio,
 917                          S, delim,
 918                          field->next_cpu,
 919                          field->next_pid,
 920                          field->next_prio,
 921                          T, comm);
 922
 923         return trace_handle_return(&iter->seq);
 924 }
 925
 926 static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags,
 927                                          struct trace_event *event)
 928 {
 929         return trace_ctxwake_print(iter, "==>");
 930 }
 931
 932 static enum print_line_t trace_wake_print(struct trace_iterator *iter,
 933                                           int flags, struct trace_event *event)
 934 {
 935         return trace_ctxwake_print(iter, "  +");
 936 }
 937
 938 static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
 939 {
 940         struct ctx_switch_entry *field;
 941         int T;
 942
 943         trace_assign_type(field, iter->ent);
 944
 945         if (!S)
 946                 S = task_index_to_char(field->prev_state);
 947         T = task_index_to_char(field->next_state);
 948         trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n",
 949                          field->prev_pid,
 950                          field->prev_prio,
 951                          S,
 952                          field->next_cpu,
 953                          field->next_pid,
 954                          field->next_prio,
 955                          T);
 956
 957         return trace_handle_return(&iter->seq);
 958 }
 959
 960 static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags,
 961                                        struct trace_event *event)
 962 {
 963         return trace_ctxwake_raw(iter, 0);
 964 }
 965
 966 static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags,
 967                                         struct trace_event *event)
 968 {
 969         return trace_ctxwake_raw(iter, '+');
 970 }
 971
 972
 973 static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
 974 {
 975         struct ctx_switch_entry *field;
 976         struct trace_seq *s = &iter->seq;
 977         int T;
 978
 979         trace_assign_type(field, iter->ent);
 980
 981         if (!S)
 982                 S = task_index_to_char(field->prev_state);
 983         T = task_index_to_char(field->next_state);
 984
 985         SEQ_PUT_HEX_FIELD(s, field->prev_pid);
 986         SEQ_PUT_HEX_FIELD(s, field->prev_prio);
 987         SEQ_PUT_HEX_FIELD(s, S);
 988         SEQ_PUT_HEX_FIELD(s, field->next_cpu);
 989         SEQ_PUT_HEX_FIELD(s, field->next_pid);
 990         SEQ_PUT_HEX_FIELD(s, field->next_prio);
 991         SEQ_PUT_HEX_FIELD(s, T);
 992
 993         return trace_handle_return(s);
 994 }
 995
 996 static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags,
 997                                        struct trace_event *event)
 998 {
 999         return trace_ctxwake_hex(iter, 0);
1000 }
1001
1002 static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags,
1003                                         struct trace_event *event)
1004 {
1005         return trace_ctxwake_hex(iter, '+');
1006 }
1007
1008 static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
1009                                            int flags, struct trace_event *event)
1010 {
1011         struct ctx_switch_entry *field;
1012         struct trace_seq *s = &iter->seq;
1013
1014         trace_assign_type(field, iter->ent);
1015
1016         SEQ_PUT_FIELD(s, field->prev_pid);
1017         SEQ_PUT_FIELD(s, field->prev_prio);
1018         SEQ_PUT_FIELD(s, field->prev_state);
1019         SEQ_PUT_FIELD(s, field->next_cpu);
1020         SEQ_PUT_FIELD(s, field->next_pid);
1021         SEQ_PUT_FIELD(s, field->next_prio);
1022         SEQ_PUT_FIELD(s, field->next_state);
1023
1024         return trace_handle_return(s);
1025 }
1026
1027 static struct trace_event_functions trace_ctx_funcs = {
1028         .trace          = trace_ctx_print,
1029         .raw            = trace_ctx_raw,
1030         .hex            = trace_ctx_hex,
1031         .binary         = trace_ctxwake_bin,
1032 };
1033
1034 static struct trace_event trace_ctx_event = {
1035         .type           = TRACE_CTX,
1036         .funcs          = &trace_ctx_funcs,
1037 };
1038
1039 static struct trace_event_functions trace_wake_funcs = {
1040         .trace          = trace_wake_print,
1041         .raw            = trace_wake_raw,
1042         .hex            = trace_wake_hex,
1043         .binary         = trace_ctxwake_bin,
1044 };
1045
1046 static struct trace_event trace_wake_event = {
1047         .type           = TRACE_WAKE,
1048         .funcs          = &trace_wake_funcs,
1049 };
1050
1051 /* TRACE_STACK */
1052
1053 static enum print_line_t trace_stack_print(struct trace_iterator *iter,
1054                                            int flags, struct trace_event *event)
1055 {
1056         struct stack_entry *field;
1057         struct trace_seq *s = &iter->seq;
1058         unsigned long *p;
1059         unsigned long *end;
1060
1061         trace_assign_type(field, iter->ent);
1062         end = (unsigned long *)((long)iter->ent + iter->ent_size);
1063
1064         trace_seq_puts(s, "<stack trace>\n");
1065
1066         for (p = field->caller; p && p < end && *p != ULONG_MAX; p++) {
1067
1068                 if (trace_seq_has_overflowed(s))
1069                         break;
1070
1071                 trace_seq_puts(s, " => ");
1072                 seq_print_ip_sym(s, *p, flags);
1073                 trace_seq_putc(s, '\n');
1074         }
1075
1076         return trace_handle_return(s);
1077 }
1078
1079 static struct trace_event_functions trace_stack_funcs = {
1080         .trace          = trace_stack_print,
1081 };
1082
1083 static struct trace_event trace_stack_event = {
1084         .type           = TRACE_STACK,
1085         .funcs          = &trace_stack_funcs,
1086 };
1087
1088 /* TRACE_USER_STACK */
1089 static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
1090                                                 int flags, struct trace_event *event)
1091 {
1092         struct trace_array *tr = iter->tr;
1093         struct userstack_entry *field;
1094         struct trace_seq *s = &iter->seq;
1095         struct mm_struct *mm = NULL;
1096         unsigned int i;
1097
1098         trace_assign_type(field, iter->ent);
1099
1100         trace_seq_puts(s, "<user stack trace>\n");
1101
1102         if (tr->trace_flags & TRACE_ITER_SYM_USEROBJ) {
1103                 struct task_struct *task;
1104                 /*
1105                  * we do the lookup on the thread group leader,
1106                  * since individual threads might have already quit!
1107                  */
1108                 rcu_read_lock();
1109                 task = find_task_by_vpid(field->tgid);
1110                 if (task)
1111                         mm = get_task_mm(task);
1112                 rcu_read_unlock();
1113         }
1114
1115         for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
1116                 unsigned long ip = field->caller[i];
1117
1118                 if (!ip || trace_seq_has_overflowed(s))
1119                         break;
1120
1121                 trace_seq_puts(s, " => ");
1122                 seq_print_user_ip(s, mm, ip, flags);
1123                 trace_seq_putc(s, '\n');
1124         }
1125
1126         if (mm)
1127                 mmput(mm);
1128
1129         return trace_handle_return(s);
1130 }
1131
1132 static struct trace_event_functions trace_user_stack_funcs = {
1133         .trace          = trace_user_stack_print,
1134 };
1135
1136 static struct trace_event trace_user_stack_event = {
1137         .type           = TRACE_USER_STACK,
1138         .funcs          = &trace_user_stack_funcs,
1139 };
1140
1141 /* TRACE_HWLAT */
1142 static enum print_line_t
1143 trace_hwlat_print(struct trace_iterator *iter, int flags,
1144                   struct trace_event *event)
1145 {
1146         struct trace_entry *entry = iter->ent;
1147         struct trace_seq *s = &iter->seq;
1148         struct hwlat_entry *field;
1149
1150         trace_assign_type(field, entry);
1151
1152         trace_seq_printf(s, "#%-5u inner/outer(us): %4llu/%-5llu ts:%lld.%09ld count:%d",
1153                          field->seqnum,
1154                          field->duration,
1155                          field->outer_duration,
1156                          (long long)field->timestamp.tv_sec,
1157                          field->timestamp.tv_nsec, field->count);
1158
1159         if (field->nmi_count) {
1160                 /*
1161                  * The generic sched_clock() is not NMI safe, thus
1162                  * we only record the count and not the time.
1163                  */
1164                 if (!IS_ENABLED(CONFIG_GENERIC_SCHED_CLOCK))
1165                         trace_seq_printf(s, " nmi-total:%llu",
1166                                          field->nmi_total_ts);
1167                 trace_seq_printf(s, " nmi-count:%u",
1168                                  field->nmi_count);
1169         }
1170
1171         trace_seq_putc(s, '\n');
1172
1173         return trace_handle_return(s);
1174 }
1175
1176 static enum print_line_t
1177 trace_hwlat_raw(struct trace_iterator *iter, int flags,
1178                 struct trace_event *event)
1179 {
1180         struct hwlat_entry *field;
1181         struct trace_seq *s = &iter->seq;
1182
1183         trace_assign_type(field, iter->ent);
1184
1185         trace_seq_printf(s, "%llu %lld %lld %09ld %u\n",
1186                          field->duration,
1187                          field->outer_duration,
1188                          (long long)field->timestamp.tv_sec,
1189                          field->timestamp.tv_nsec,
1190                          field->seqnum);
1191
1192         return trace_handle_return(s);
1193 }
1194
1195 static struct trace_event_functions trace_hwlat_funcs = {
1196         .trace          = trace_hwlat_print,
1197         .raw            = trace_hwlat_raw,
1198 };
1199
1200 static struct trace_event trace_hwlat_event = {
1201         .type           = TRACE_HWLAT,
1202         .funcs          = &trace_hwlat_funcs,
1203 };
1204
1205 /* TRACE_OSNOISE */
1206 static enum print_line_t
1207 trace_osnoise_print(struct trace_iterator *iter, int flags,
1208                     struct trace_event *event)
1209 {
1210         struct trace_entry *entry = iter->ent;
1211         struct trace_seq *s = &iter->seq;
1212         struct osnoise_entry *field;
1213         u64 ratio, ratio_dec;
1214         u64 net_runtime;
1215
1216         trace_assign_type(field, entry);
1217
1218         /*
1219          * compute the available % of cpu time.
1220          */
1221         net_runtime = field->runtime - field->noise;
1222         ratio = net_runtime * 10000000;
1223         do_div(ratio, field->runtime);
1224         ratio_dec = do_div(ratio, 100000);
1225
1226         trace_seq_printf(s, "%llu %10llu %3llu.%05llu %7llu",
1227                          field->runtime,
1228                          field->noise,
1229                          ratio, ratio_dec,
1230                          field->max_sample);
1231
1232         trace_seq_printf(s, " %6u", field->hw_count);
1233         trace_seq_printf(s, " %6u", field->nmi_count);
1234         trace_seq_printf(s, " %6u", field->irq_count);
1235         trace_seq_printf(s, " %6u", field->softirq_count);
1236         trace_seq_printf(s, " %6u", field->thread_count);
1237
1238         trace_seq_putc(s, '\n');
1239
1240         return trace_handle_return(s);
1241 }
1242
1243 static enum print_line_t
1244 trace_osnoise_raw(struct trace_iterator *iter, int flags,
1245                   struct trace_event *event)
1246 {
1247         struct osnoise_entry *field;
1248         struct trace_seq *s = &iter->seq;
1249
1250         trace_assign_type(field, iter->ent);
1251
1252         trace_seq_printf(s, "%lld %llu %llu %u %u %u %u %u\n",
1253                          field->runtime,
1254                          field->noise,
1255                          field->max_sample,
1256                          field->hw_count,
1257                          field->nmi_count,
1258                          field->irq_count,
1259                          field->softirq_count,
1260                          field->thread_count);
1261
1262         return trace_handle_return(s);
1263 }
1264
1265 static struct trace_event_functions trace_osnoise_funcs = {
1266         .trace          = trace_osnoise_print,
1267         .raw            = trace_osnoise_raw,
1268 };
1269
1270 static struct trace_event trace_osnoise_event = {
1271         .type           = TRACE_OSNOISE,
1272         .funcs          = &trace_osnoise_funcs,
1273 };
1274
1275 /* TRACE_TIMERLAT */
1276 static enum print_line_t
1277 trace_timerlat_print(struct trace_iterator *iter, int flags,
1278                      struct trace_event *event)
1279 {
1280         struct trace_entry *entry = iter->ent;
1281         struct trace_seq *s = &iter->seq;
1282         struct timerlat_entry *field;
1283
1284         trace_assign_type(field, entry);
1285
1286         trace_seq_printf(s, "#%-5u context %6s timer_latency %9llu ns\n",
1287                          field->seqnum,
1288                          field->context ? "thread" : "irq",
1289                          field->timer_latency);
1290
1291         return trace_handle_return(s);
1292 }
1293
1294 static enum print_line_t
1295 trace_timerlat_raw(struct trace_iterator *iter, int flags,
1296                    struct trace_event *event)
1297 {
1298         struct timerlat_entry *field;
1299         struct trace_seq *s = &iter->seq;
1300
1301         trace_assign_type(field, iter->ent);
1302
1303         trace_seq_printf(s, "%u %d %llu\n",
1304                          field->seqnum,
1305                          field->context,
1306                          field->timer_latency);
1307
1308         return trace_handle_return(s);
1309 }
1310
1311 static struct trace_event_functions trace_timerlat_funcs = {
1312         .trace          = trace_timerlat_print,
1313         .raw            = trace_timerlat_raw,
1314 };
1315
1316 static struct trace_event trace_timerlat_event = {
1317         .type           = TRACE_TIMERLAT,
1318         .funcs          = &trace_timerlat_funcs,
1319 };
1320
1321 /* TRACE_BPUTS */
1322 static enum print_line_t
1323 trace_bputs_print(struct trace_iterator *iter, int flags,
1324                    struct trace_event *event)
1325 {
1326         struct trace_entry *entry = iter->ent;
1327         struct trace_seq *s = &iter->seq;
1328         struct bputs_entry *field;
1329
1330         trace_assign_type(field, entry);
1331
1332         seq_print_ip_sym(s, field->ip, flags);
1333         trace_seq_puts(s, ": ");
1334         trace_seq_puts(s, field->str);
1335
1336         return trace_handle_return(s);
1337 }
1338
1339
1340 static enum print_line_t
1341 trace_bputs_raw(struct trace_iterator *iter, int flags,
1342                 struct trace_event *event)
1343 {
1344         struct bputs_entry *field;
1345         struct trace_seq *s = &iter->seq;
1346
1347         trace_assign_type(field, iter->ent);
1348
1349         trace_seq_printf(s, ": %lx : ", field->ip);
1350         trace_seq_puts(s, field->str);
1351
1352         return trace_handle_return(s);
1353 }
1354
1355 static struct trace_event_functions trace_bputs_funcs = {
1356         .trace          = trace_bputs_print,
1357         .raw            = trace_bputs_raw,
1358 };
1359
1360 static struct trace_event trace_bputs_event = {
1361         .type           = TRACE_BPUTS,
1362         .funcs          = &trace_bputs_funcs,
1363 };
1364
1365 /* TRACE_BPRINT */
1366 static enum print_line_t
1367 trace_bprint_print(struct trace_iterator *iter, int flags,
1368                    struct trace_event *event)
1369 {
1370         struct trace_entry *entry = iter->ent;
1371         struct trace_seq *s = &iter->seq;
1372         struct bprint_entry *field;
1373
1374         trace_assign_type(field, entry);
1375
1376         seq_print_ip_sym(s, field->ip, flags);
1377         trace_seq_puts(s, ": ");
1378         trace_seq_bprintf(s, field->fmt, field->buf);
1379
1380         return trace_handle_return(s);
1381 }
1382
1383
1384 static enum print_line_t
1385 trace_bprint_raw(struct trace_iterator *iter, int flags,
1386                  struct trace_event *event)
1387 {
1388         struct bprint_entry *field;
1389         struct trace_seq *s = &iter->seq;
1390
1391         trace_assign_type(field, iter->ent);
1392
1393         trace_seq_printf(s, ": %lx : ", field->ip);
1394         trace_seq_bprintf(s, field->fmt, field->buf);
1395
1396         return trace_handle_return(s);
1397 }
1398
1399 static struct trace_event_functions trace_bprint_funcs = {
1400         .trace          = trace_bprint_print,
1401         .raw            = trace_bprint_raw,
1402 };
1403
1404 static struct trace_event trace_bprint_event = {
1405         .type           = TRACE_BPRINT,
1406         .funcs          = &trace_bprint_funcs,
1407 };
1408
1409 /* TRACE_PRINT */
1410 static enum print_line_t trace_print_print(struct trace_iterator *iter,
1411                                            int flags, struct trace_event *event)
1412 {
1413         struct print_entry *field;
1414         struct trace_seq *s = &iter->seq;
1415
1416         trace_assign_type(field, iter->ent);
1417
1418         seq_print_ip_sym(s, field->ip, flags);
1419         trace_seq_printf(s, ": %s", field->buf);
1420
1421         return trace_handle_return(s);
1422 }
1423
1424 static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags,
1425                                          struct trace_event *event)
1426 {
1427         struct print_entry *field;
1428
1429         trace_assign_type(field, iter->ent);
1430
1431         trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf);
1432
1433         return trace_handle_return(&iter->seq);
1434 }
1435
1436 static struct trace_event_functions trace_print_funcs = {
1437         .trace          = trace_print_print,
1438         .raw            = trace_print_raw,
1439 };
1440
1441 static struct trace_event trace_print_event = {
1442         .type           = TRACE_PRINT,
1443         .funcs          = &trace_print_funcs,
1444 };
1445
1446 static enum print_line_t trace_raw_data(struct trace_iterator *iter, int flags,
1447                                          struct trace_event *event)
1448 {
1449         struct raw_data_entry *field;
1450         int i;
1451
1452         trace_assign_type(field, iter->ent);
1453
1454         trace_seq_printf(&iter->seq, "# %x buf:", field->id);
1455
1456         for (i = 0; i < iter->ent_size - offsetof(struct raw_data_entry, buf); i++)
1457                 trace_seq_printf(&iter->seq, " %02x",
1458                                  (unsigned char)field->buf[i]);
1459
1460         trace_seq_putc(&iter->seq, '\n');
1461
1462         return trace_handle_return(&iter->seq);
1463 }
1464
1465 static struct trace_event_functions trace_raw_data_funcs = {
1466         .trace          = trace_raw_data,
1467         .raw            = trace_raw_data,
1468 };
1469
1470 static struct trace_event trace_raw_data_event = {
1471         .type           = TRACE_RAW_DATA,
1472         .funcs          = &trace_raw_data_funcs,
1473 };
1474
1475 static enum print_line_t
1476 trace_func_repeats_raw(struct trace_iterator *iter, int flags,
1477                          struct trace_event *event)
1478 {
1479         struct func_repeats_entry *field;
1480         struct trace_seq *s = &iter->seq;
1481
1482         trace_assign_type(field, iter->ent);
1483
1484         trace_seq_printf(s, "%lu %lu %u %llu\n",
1485                          field->ip,
1486                          field->parent_ip,
1487                          field->count,
1488                          FUNC_REPEATS_GET_DELTA_TS(field));
1489
1490         return trace_handle_return(s);
1491 }
1492
1493 static enum print_line_t
1494 trace_func_repeats_print(struct trace_iterator *iter, int flags,
1495                          struct trace_event *event)
1496 {
1497         struct func_repeats_entry *field;
1498         struct trace_seq *s = &iter->seq;
1499
1500         trace_assign_type(field, iter->ent);
1501
1502         print_fn_trace(s, field->ip, field->parent_ip, flags);
1503         trace_seq_printf(s, " (repeats: %u, last_ts:", field->count);
1504         trace_print_time(s, iter,
1505                          iter->ts - FUNC_REPEATS_GET_DELTA_TS(field));
1506         trace_seq_puts(s, ")\n");
1507
1508         return trace_handle_return(s);
1509 }
1510
1511 static struct trace_event_functions trace_func_repeats_funcs = {
1512         .trace          = trace_func_repeats_print,
1513         .raw            = trace_func_repeats_raw,
1514 };
1515
1516 static struct trace_event trace_func_repeats_event = {
1517         .type           = TRACE_FUNC_REPEATS,
1518         .funcs          = &trace_func_repeats_funcs,
1519 };
1520
1521 static struct trace_event *events[] __initdata = {
1522         &trace_fn_event,
1523         &trace_ctx_event,
1524         &trace_wake_event,
1525         &trace_stack_event,
1526         &trace_user_stack_event,
1527         &trace_bputs_event,
1528         &trace_bprint_event,
1529         &trace_print_event,
1530         &trace_hwlat_event,
1531         &trace_osnoise_event,
1532         &trace_timerlat_event,
1533         &trace_raw_data_event,
1534         &trace_func_repeats_event,
1535         NULL
1536 };
1537
1538 __init static int init_events(void)
1539 {
1540         struct trace_event *event;
1541         int i, ret;
1542
1543         for (i = 0; events[i]; i++) {
1544                 event = events[i];
1545                 ret = register_trace_event(event);
1546                 WARN_ONCE(!ret, "event %d failed to register", event->type);
1547         }
1548
1549         return 0;
1550 }
1551 early_initcall(init_events);