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