init.c

   1 /*
   2  * This file contains job initialization and setup functions.
   3  */
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <unistd.h>
   7 #include <fcntl.h>
   8 #include <ctype.h>
   9 #include <string.h>
  10 #include <errno.h>
  11 #include <getopt.h>
  12 #include <sys/ipc.h>
  13 #include <sys/shm.h>
  14 #include <sys/types.h>
  15 #include <sys/stat.h>
  16
  17 #include "fio.h"
  18 #include "parse.h"
  19 #include "smalloc.h"
  20 #include "filehash.h"
  21 #include "verify.h"
  22
  23 static char fio_version_string[] = "fio 1.29-rc1";
  24
  25 #define FIO_RANDSEED            (0xb1899bedUL)
  26
  27 static char **ini_file;
  28 static int max_jobs = MAX_JOBS;
  29 static int dump_cmdline;
  30
  31 static struct thread_data def_thread;
  32 struct thread_data *threads = NULL;
  33
  34 int exitall_on_terminate = 0;
  35 int terse_output = 0;
  36 int eta_print;
  37 unsigned long long mlock_size = 0;
  38 FILE *f_out = NULL;
  39 FILE *f_err = NULL;
  40 char *job_section = NULL;
  41
  42 int write_bw_log = 0;
  43 int read_only = 0;
  44
  45 static int def_timeout;
  46 static int write_lat_log;
  47
  48 static int prev_group_jobs;
  49
  50 unsigned long fio_debug = 0;
  51 unsigned int fio_debug_jobno = -1;
  52 unsigned int *fio_debug_jobp = NULL;
  53
  54 /*
  55  * Command line options. These will contain the above, plus a few
  56  * extra that only pertain to fio itself and not jobs.
  57  */
  58 static struct option l_opts[FIO_NR_OPTIONS] = {
  59         {
  60                 .name           = "output",
  61                 .has_arg        = required_argument,
  62                 .val            = 'o',
  63         },
  64         {
  65                 .name           = "timeout",
  66                 .has_arg        = required_argument,
  67                 .val            = 't',
  68         },
  69         {
  70                 .name           = "latency-log",
  71                 .has_arg        = required_argument,
  72                 .val            = 'l',
  73         },
  74         {
  75                 .name           = "bandwidth-log",
  76                 .has_arg        = required_argument,
  77                 .val            = 'b',
  78         },
  79         {
  80                 .name           = "minimal",
  81                 .has_arg        = optional_argument,
  82                 .val            = 'm',
  83         },
  84         {
  85                 .name           = "version",
  86                 .has_arg        = no_argument,
  87                 .val            = 'v',
  88         },
  89         {
  90                 .name           = "help",
  91                 .has_arg        = no_argument,
  92                 .val            = 'h',
  93         },
  94         {
  95                 .name           = "cmdhelp",
  96                 .has_arg        = optional_argument,
  97                 .val            = 'c',
  98         },
  99         {
 100                 .name           = "showcmd",
 101                 .has_arg        = no_argument,
 102                 .val            = 's',
 103         },
 104         {
 105                 .name           = "readonly",
 106                 .has_arg        = no_argument,
 107                 .val            = 'r',
 108         },
 109         {
 110                 .name           = "eta",
 111                 .has_arg        = required_argument,
 112                 .val            = 'e',
 113         },
 114         {
 115                 .name           = "debug",
 116                 .has_arg        = required_argument,
 117                 .val            = 'd',
 118         },
 119         {
 120                 .name           = "section",
 121                 .has_arg        = required_argument,
 122                 .val            = 'x',
 123         },
 124         {
 125                 .name           = "alloc-size",
 126                 .has_arg        = required_argument,
 127                 .val            = 'a',
 128         },
 129         {
 130                 .name           = NULL,
 131         },
 132 };
 133
 134 FILE *get_f_out()
 135 {
 136         return f_out;
 137 }
 138
 139 FILE *get_f_err()
 140 {
 141         return f_err;
 142 }
 143
 144 /*
 145  * Return a free job structure.
 146  */
 147 static struct thread_data *get_new_job(int global, struct thread_data *parent)
 148 {
 149         struct thread_data *td;
 150
 151         if (global)
 152                 return &def_thread;
 153         if (thread_number >= max_jobs)
 154                 return NULL;
 155
 156         td = &threads[thread_number++];
 157         *td = *parent;
 158
 159         dup_files(td, parent);
 160         options_mem_dupe(td);
 161
 162         td->thread_number = thread_number;
 163         return td;
 164 }
 165
 166 static void put_job(struct thread_data *td)
 167 {
 168         if (td == &def_thread)
 169                 return;
 170
 171         if (td->error)
 172                 log_info("fio: %s\n", td->verror);
 173
 174         memset(&threads[td->thread_number - 1], 0, sizeof(*td));
 175         thread_number--;
 176 }
 177
 178 static int __setup_rate(struct thread_data *td, enum fio_ddir ddir)
 179 {
 180         unsigned int bs = td->o.min_bs[ddir];
 181         unsigned long long rate;
 182         unsigned long ios_per_msec;
 183
 184         if (td->o.rate[ddir]) {
 185                 rate = td->o.rate[ddir];
 186                 ios_per_msec = (rate * 1000LL) / bs;
 187         } else
 188                 ios_per_msec = td->o.rate_iops[ddir] * 1000UL;
 189
 190         if (!ios_per_msec) {
 191                 log_err("rate lower than supported\n");
 192                 return -1;
 193         }
 194
 195         td->rate_usec_cycle[ddir] = 1000000000ULL / ios_per_msec;
 196         td->rate_pending_usleep[ddir] = 0;
 197         return 0;
 198 }
 199
 200 static int setup_rate(struct thread_data *td)
 201 {
 202         int ret = 0;
 203
 204         if (td->o.rate[DDIR_READ] || td->o.rate_iops[DDIR_READ])
 205                 ret = __setup_rate(td, DDIR_READ);
 206         if (td->o.rate[DDIR_WRITE] || td->o.rate_iops[DDIR_WRITE])
 207                 ret |= __setup_rate(td, DDIR_WRITE);
 208
 209         return ret;
 210 }
 211
 212 static int fixed_block_size(struct thread_options *o)
 213 {
 214         return o->min_bs[DDIR_READ] == o->max_bs[DDIR_READ] &&
 215                 o->min_bs[DDIR_WRITE] == o->max_bs[DDIR_WRITE] &&
 216                 o->min_bs[DDIR_READ] == o->min_bs[DDIR_WRITE];
 217 }
 218
 219 /*
 220  * Lazy way of fixing up options that depend on each other. We could also
 221  * define option callback handlers, but this is easier.
 222  */
 223 static int fixup_options(struct thread_data *td)
 224 {
 225         struct thread_options *o = &td->o;
 226
 227 #ifndef FIO_HAVE_PSHARED_MUTEX
 228         if (!td->o.use_thread) {
 229                 log_info("fio: this platform does not support process shared"
 230                          " mutexes, forcing use of threads. Use the 'thread'"
 231                          " option to get rid of this warning.\n");
 232                 td->o.use_thread = 1;
 233         }
 234 #endif
 235
 236         if (o->write_iolog_file && o->read_iolog_file) {
 237                 log_err("fio: read iolog overrides write_iolog\n");
 238                 free(o->write_iolog_file);
 239                 o->write_iolog_file = NULL;
 240         }
 241
 242         /*
 243          * only really works for sequential io for now, and with 1 file
 244          */
 245         if (o->zone_size && td_random(td) && o->open_files == 1)
 246                 o->zone_size = 0;
 247
 248         /*
 249          * Reads can do overwrites, we always need to pre-create the file
 250          */
 251         if (td_read(td) || td_rw(td))
 252                 o->overwrite = 1;
 253
 254         if (!o->min_bs[DDIR_READ])
 255                 o->min_bs[DDIR_READ] = o->bs[DDIR_READ];
 256         if (!o->max_bs[DDIR_READ])
 257                 o->max_bs[DDIR_READ] = o->bs[DDIR_READ];
 258         if (!o->min_bs[DDIR_WRITE])
 259                 o->min_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 260         if (!o->max_bs[DDIR_WRITE])
 261                 o->max_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 262
 263         o->rw_min_bs = min(o->min_bs[DDIR_READ], o->min_bs[DDIR_WRITE]);
 264
 265         /*
 266          * For random IO, allow blockalign offset other than min_bs.
 267          */
 268         if (!o->ba[DDIR_READ] || !td_random(td))
 269                 o->ba[DDIR_READ] = o->min_bs[DDIR_READ];
 270         if (!o->ba[DDIR_WRITE] || !td_random(td))
 271                 o->ba[DDIR_WRITE] = o->min_bs[DDIR_WRITE];
 272
 273         if ((o->ba[DDIR_READ] != o->min_bs[DDIR_READ] ||
 274             o->ba[DDIR_WRITE] != o->min_bs[DDIR_WRITE]) &&
 275             !td->o.norandommap) {
 276                 log_err("fio: Any use of blockalign= turns off randommap\n");
 277                 td->o.norandommap = 1;
 278         }
 279
 280         if (!o->file_size_high)
 281                 o->file_size_high = o->file_size_low;
 282
 283         if (o->norandommap && o->verify != VERIFY_NONE
 284             && !fixed_block_size(o))  {
 285                 log_err("fio: norandommap given for variable block sizes, "
 286                         "verify disabled\n");
 287                 o->verify = VERIFY_NONE;
 288         }
 289         if (o->bs_unaligned && (o->odirect || td->io_ops->flags & FIO_RAWIO))
 290                 log_err("fio: bs_unaligned may not work with raw io\n");
 291
 292         /*
 293          * thinktime_spin must be less than thinktime
 294          */
 295         if (o->thinktime_spin > o->thinktime)
 296                 o->thinktime_spin = o->thinktime;
 297
 298         /*
 299          * The low water mark cannot be bigger than the iodepth
 300          */
 301         if (o->iodepth_low > o->iodepth || !o->iodepth_low) {
 302                 /*
 303                  * syslet work around - if the workload is sequential,
 304                  * we want to let the queue drain all the way down to
 305                  * avoid seeking between async threads
 306                  */
 307                 if (!strcmp(td->io_ops->name, "syslet-rw") && !td_random(td))
 308                         o->iodepth_low = 1;
 309                 else
 310                         o->iodepth_low = o->iodepth;
 311         }
 312
 313         /*
 314          * If batch number isn't set, default to the same as iodepth
 315          */
 316         if (o->iodepth_batch > o->iodepth || !o->iodepth_batch)
 317                 o->iodepth_batch = o->iodepth;
 318
 319         if (o->nr_files > td->files_index)
 320                 o->nr_files = td->files_index;
 321
 322         if (o->open_files > o->nr_files || !o->open_files)
 323                 o->open_files = o->nr_files;
 324
 325         if (((o->rate[0] + o->rate[1]) && (o->rate_iops[0] + o->rate_iops[1]))||
 326             ((o->ratemin[0] + o->ratemin[1]) && (o->rate_iops_min[0] +
 327                 o->rate_iops_min[1]))) {
 328                 log_err("fio: rate and rate_iops are mutually exclusive\n");
 329                 return 1;
 330         }
 331         if ((o->rate[0] < o->ratemin[0]) || (o->rate[1] < o->ratemin[1]) ||
 332             (o->rate_iops[0] < o->rate_iops_min[0]) ||
 333             (o->rate_iops[1] < o->rate_iops_min[1])) {
 334                 log_err("fio: minimum rate exceeds rate\n");
 335                 return 1;
 336         }
 337
 338         if (!o->timeout && o->time_based) {
 339                 log_err("fio: time_based requires a runtime/timeout setting\n");
 340                 o->time_based = 0;
 341         }
 342
 343         if (o->fill_device && !o->size)
 344                 o->size = -1ULL;
 345
 346         if (td_rw(td) && td->o.verify != VERIFY_NONE)
 347                 log_info("fio: mixed read/write workload with verify. May not "
 348                  "work as expected, unless you pre-populated the file\n");
 349
 350         if (td->o.verify != VERIFY_NONE)
 351                 td->o.refill_buffers = 1;
 352
 353         if (td->o.pre_read)
 354                 td->o.invalidate_cache = 0;
 355
 356         if (td->o.mem_align) {
 357                 if (td->o.odirect && !is_power_of_2(td->o.mem_align)) {
 358                         log_err("fio: given IO mem alignment conflicts with"
 359                                         " direct=1. Resetting.\n");
 360                         td->o.mem_align = page_mask;
 361                 }
 362         }
 363
 364         return 0;
 365 }
 366
 367 /*
 368  * This function leaks the buffer
 369  */
 370 static char *to_kmg(unsigned int val)
 371 {
 372         char *buf = malloc(32);
 373         char post[] = { 0, 'K', 'M', 'G', 'P', 'E', 0 };
 374         char *p = post;
 375
 376         do {
 377                 if (val & 1023)
 378                         break;
 379
 380                 val >>= 10;
 381                 p++;
 382         } while (*p);
 383
 384         snprintf(buf, 31, "%u%c", val, *p);
 385         return buf;
 386 }
 387
 388 /* External engines are specified by "external:name.o") */
 389 static const char *get_engine_name(const char *str)
 390 {
 391         char *p = strstr(str, ":");
 392
 393         if (!p)
 394                 return str;
 395
 396         p++;
 397         strip_blank_front(&p);
 398         strip_blank_end(p);
 399         return p;
 400 }
 401
 402 static int exists_and_not_file(const char *filename)
 403 {
 404         struct stat sb;
 405
 406         if (lstat(filename, &sb) == -1)
 407                 return 0;
 408
 409         if (S_ISREG(sb.st_mode))
 410                 return 0;
 411
 412         return 1;
 413 }
 414
 415 void td_fill_rand_seeds(struct thread_data *td)
 416 {
 417         os_random_seed(td->rand_seeds[0], &td->bsrange_state);
 418         os_random_seed(td->rand_seeds[1], &td->verify_state);
 419         os_random_seed(td->rand_seeds[2], &td->rwmix_state);
 420
 421         if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
 422                 os_random_seed(td->rand_seeds[3], &td->next_file_state);
 423
 424         os_random_seed(td->rand_seeds[5], &td->file_size_state);
 425
 426         if (!td_random(td))
 427                 return;
 428
 429         if (td->o.rand_repeatable)
 430                 td->rand_seeds[4] = FIO_RANDSEED * td->thread_number;
 431
 432         os_random_seed(td->rand_seeds[4], &td->random_state);
 433 }
 434
 435 /*
 436  * Initialize the various random states we need (random io, block size ranges,
 437  * read/write mix, etc).
 438  */
 439 static int init_random_state(struct thread_data *td)
 440 {
 441         int fd;
 442
 443         fd = open("/dev/urandom", O_RDONLY);
 444         if (fd == -1) {
 445                 td_verror(td, errno, "open");
 446                 return 1;
 447         }
 448
 449         if (read(fd, td->rand_seeds, sizeof(td->rand_seeds)) <
 450             (int) sizeof(td->rand_seeds)) {
 451                 td_verror(td, EIO, "read");
 452                 close(fd);
 453                 return 1;
 454         }
 455
 456         close(fd);
 457         td_fill_rand_seeds(td);
 458         return 0;
 459 }
 460
 461 /*
 462  * Adds a job to the list of things todo. Sanitizes the various options
 463  * to make sure we don't have conflicts, and initializes various
 464  * members of td.
 465  */
 466 static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
 467 {
 468         const char *ddir_str[] = { NULL, "read", "write", "rw", NULL,
 469                                    "randread", "randwrite", "randrw" };
 470         unsigned int i;
 471         const char *engine;
 472         char fname[PATH_MAX];
 473         int numjobs, file_alloced;
 474
 475         /*
 476          * the def_thread is just for options, it's not a real job
 477          */
 478         if (td == &def_thread)
 479                 return 0;
 480
 481         /*
 482          * if we are just dumping the output command line, don't add the job
 483          */
 484         if (dump_cmdline) {
 485                 put_job(td);
 486                 return 0;
 487         }
 488
 489         engine = get_engine_name(td->o.ioengine);
 490         td->io_ops = load_ioengine(td, engine);
 491         if (!td->io_ops) {
 492                 log_err("fio: failed to load engine %s\n", engine);
 493                 goto err;
 494         }
 495
 496         if (td->o.use_thread)
 497                 nr_thread++;
 498         else
 499                 nr_process++;
 500
 501         if (td->o.odirect)
 502                 td->io_ops->flags |= FIO_RAWIO;
 503
 504         file_alloced = 0;
 505         if (!td->o.filename && !td->files_index && !td->o.read_iolog_file) {
 506                 file_alloced = 1;
 507
 508                 if (td->o.nr_files == 1 && exists_and_not_file(jobname))
 509                         add_file(td, jobname);
 510                 else {
 511                         for (i = 0; i < td->o.nr_files; i++) {
 512                                 sprintf(fname, "%s.%d.%d", jobname,
 513                                                         td->thread_number, i);
 514                                 add_file(td, fname);
 515                         }
 516                 }
 517         }
 518
 519         if (fixup_options(td))
 520                 goto err;
 521
 522         if (td->io_ops->flags & FIO_DISKLESSIO) {
 523                 struct fio_file *f;
 524
 525                 for_each_file(td, f, i)
 526                         f->real_file_size = -1ULL;
 527         }
 528
 529         td->mutex = fio_mutex_init(0);
 530
 531         td->ts.clat_stat[0].min_val = td->ts.clat_stat[1].min_val = ULONG_MAX;
 532         td->ts.slat_stat[0].min_val = td->ts.slat_stat[1].min_val = ULONG_MAX;
 533         td->ts.bw_stat[0].min_val = td->ts.bw_stat[1].min_val = ULONG_MAX;
 534         td->ddir_nr = td->o.ddir_nr;
 535
 536         if ((td->o.stonewall || td->o.numjobs > 1 || td->o.new_group)
 537              && prev_group_jobs) {
 538                 prev_group_jobs = 0;
 539                 groupid++;
 540         }
 541
 542         td->groupid = groupid;
 543         prev_group_jobs++;
 544
 545         if (init_random_state(td))
 546                 goto err;
 547
 548         if (setup_rate(td))
 549                 goto err;
 550
 551         if (td->o.write_lat_log) {
 552                 setup_log(&td->ts.slat_log);
 553                 setup_log(&td->ts.clat_log);
 554         }
 555         if (td->o.write_bw_log)
 556                 setup_log(&td->ts.bw_log);
 557
 558         if (!td->o.name)
 559                 td->o.name = strdup(jobname);
 560
 561         if (!terse_output) {
 562                 if (!job_add_num) {
 563                         if (!strcmp(td->io_ops->name, "cpuio")) {
 564                                 log_info("%s: ioengine=cpu, cpuload=%u,"
 565                                          " cpucycle=%u\n", td->o.name,
 566                                                         td->o.cpuload,
 567                                                         td->o.cpucycle);
 568                         } else {
 569                                 char *c1, *c2, *c3, *c4;
 570
 571                                 c1 = to_kmg(td->o.min_bs[DDIR_READ]);
 572                                 c2 = to_kmg(td->o.max_bs[DDIR_READ]);
 573                                 c3 = to_kmg(td->o.min_bs[DDIR_WRITE]);
 574                                 c4 = to_kmg(td->o.max_bs[DDIR_WRITE]);
 575
 576                                 log_info("%s: (g=%d): rw=%s, bs=%s-%s/%s-%s,"
 577                                          " ioengine=%s, iodepth=%u\n",
 578                                                 td->o.name, td->groupid,
 579                                                 ddir_str[td->o.td_ddir],
 580                                                 c1, c2, c3, c4,
 581                                                 td->io_ops->name,
 582                                                 td->o.iodepth);
 583
 584                                 free(c1);
 585                                 free(c2);
 586                                 free(c3);
 587                                 free(c4);
 588                         }
 589                 } else if (job_add_num == 1)
 590                         log_info("...\n");
 591         }
 592
 593         /*
 594          * recurse add identical jobs, clear numjobs and stonewall options
 595          * as they don't apply to sub-jobs
 596          */
 597         numjobs = td->o.numjobs;
 598         while (--numjobs) {
 599                 struct thread_data *td_new = get_new_job(0, td);
 600
 601                 if (!td_new)
 602                         goto err;
 603
 604                 td_new->o.numjobs = 1;
 605                 td_new->o.stonewall = 0;
 606                 td_new->o.new_group = 0;
 607
 608                 if (file_alloced) {
 609                         td_new->o.filename = NULL;
 610                         td_new->files_index = 0;
 611                         td_new->files_size = 0;
 612                         td_new->files = NULL;
 613                 }
 614
 615                 job_add_num = numjobs - 1;
 616
 617                 if (add_job(td_new, jobname, job_add_num))
 618                         goto err;
 619         }
 620
 621         return 0;
 622 err:
 623         put_job(td);
 624         return -1;
 625 }
 626
 627 static int skip_this_section(const char *name)
 628 {
 629         if (!job_section)
 630                 return 0;
 631         if (!strncmp(name, "global", 6))
 632                 return 0;
 633
 634         return strcmp(job_section, name);
 635 }
 636
 637 static int is_empty_or_comment(char *line)
 638 {
 639         unsigned int i;
 640
 641         for (i = 0; i < strlen(line); i++) {
 642                 if (line[i] == ';')
 643                         return 1;
 644                 if (line[i] == '#')
 645                         return 1;
 646                 if (!isspace(line[i]) && !iscntrl(line[i]))
 647                         return 0;
 648         }
 649
 650         return 1;
 651 }
 652
 653 /*
 654  * This is our [ini] type file parser.
 655  */
 656 static int parse_jobs_ini(char *file, int stonewall_flag)
 657 {
 658         unsigned int global;
 659         struct thread_data *td;
 660         char *string, *name;
 661         FILE *f;
 662         char *p;
 663         int ret = 0, stonewall;
 664         int first_sect = 1;
 665         int skip_fgets = 0;
 666         int inside_skip = 0;
 667         char **opts;
 668         int i, alloc_opts, num_opts;
 669
 670         if (!strcmp(file, "-"))
 671                 f = stdin;
 672         else
 673                 f = fopen(file, "r");
 674
 675         if (!f) {
 676                 perror("fopen job file");
 677                 return 1;
 678         }
 679
 680         string = malloc(4096);
 681
 682         /*
 683          * it's really 256 + small bit, 280 should suffice
 684          */
 685         name = malloc(280);
 686         memset(name, 0, 280);
 687
 688         alloc_opts = 8;
 689         opts = malloc(sizeof(char *) * alloc_opts);
 690         num_opts = 0;
 691
 692         stonewall = stonewall_flag;
 693         do {
 694                 /*
 695                  * if skip_fgets is set, we already have loaded a line we
 696                  * haven't handled.
 697                  */
 698                 if (!skip_fgets) {
 699                         p = fgets(string, 4095, f);
 700                         if (!p)
 701                                 break;
 702                 }
 703
 704                 skip_fgets = 0;
 705                 strip_blank_front(&p);
 706                 strip_blank_end(p);
 707
 708                 if (is_empty_or_comment(p))
 709                         continue;
 710                 if (sscanf(p, "[%255s]", name) != 1) {
 711                         if (inside_skip)
 712                                 continue;
 713                         log_err("fio: option <%s> outside of [] job section\n",
 714                                                                         p);
 715                         break;
 716                 }
 717
 718                 if (skip_this_section(name)) {
 719                         inside_skip = 1;
 720                         continue;
 721                 } else
 722                         inside_skip = 0;
 723
 724                 global = !strncmp(name, "global", 6);
 725
 726                 name[strlen(name) - 1] = '\0';
 727
 728                 if (dump_cmdline) {
 729                         if (first_sect)
 730                                 log_info("fio ");
 731                         if (!global)
 732                                 log_info("--name=%s ", name);
 733                         first_sect = 0;
 734                 }
 735
 736                 td = get_new_job(global, &def_thread);
 737                 if (!td) {
 738                         ret = 1;
 739                         break;
 740                 }
 741
 742                 /*
 743                  * Seperate multiple job files by a stonewall
 744                  */
 745                 if (!global && stonewall) {
 746                         td->o.stonewall = stonewall;
 747                         stonewall = 0;
 748                 }
 749
 750                 num_opts = 0;
 751                 memset(opts, 0, alloc_opts * sizeof(char *));
 752
 753                 while ((p = fgets(string, 4096, f)) != NULL) {
 754                         if (is_empty_or_comment(p))
 755                                 continue;
 756
 757                         strip_blank_front(&p);
 758
 759                         /*
 760                          * new section, break out and make sure we don't
 761                          * fgets() a new line at the top.
 762                          */
 763                         if (p[0] == '[') {
 764                                 skip_fgets = 1;
 765                                 break;
 766                         }
 767
 768                         strip_blank_end(p);
 769
 770                         if (num_opts == alloc_opts) {
 771                                 alloc_opts <<= 1;
 772                                 opts = realloc(opts,
 773                                                 alloc_opts * sizeof(char *));
 774                         }
 775
 776                         opts[num_opts] = strdup(p);
 777                         num_opts++;
 778                 }
 779
 780                 ret = fio_options_parse(td, opts, num_opts);
 781                 if (!ret) {
 782                         if (dump_cmdline)
 783                                 for (i = 0; i < num_opts; i++)
 784                                         log_info("--%s ", opts[i]);
 785
 786                         ret = add_job(td, name, 0);
 787                 } else {
 788                         log_err("fio: job %s dropped\n", name);
 789                         put_job(td);
 790                 }
 791
 792                 for (i = 0; i < num_opts; i++)
 793                         free(opts[i]);
 794                 num_opts = 0;
 795         } while (!ret);
 796
 797         if (dump_cmdline)
 798                 log_info("\n");
 799
 800         for (i = 0; i < num_opts; i++)
 801                 free(opts[i]);
 802
 803         free(string);
 804         free(name);
 805         free(opts);
 806         if (f != stdin)
 807                 fclose(f);
 808         return ret;
 809 }
 810
 811 static int fill_def_thread(void)
 812 {
 813         memset(&def_thread, 0, sizeof(def_thread));
 814
 815         fio_getaffinity(getpid(), &def_thread.o.cpumask);
 816
 817         /*
 818          * fill default options
 819          */
 820         fio_fill_default_options(&def_thread);
 821
 822         def_thread.o.timeout = def_timeout;
 823         def_thread.o.write_bw_log = write_bw_log;
 824         def_thread.o.write_lat_log = write_lat_log;
 825
 826         return 0;
 827 }
 828
 829 static void free_shm(void)
 830 {
 831         struct shmid_ds sbuf;
 832
 833         if (threads) {
 834                 void *tp = threads;
 835
 836                 threads = NULL;
 837                 file_hash_exit();
 838                 fio_debug_jobp = NULL;
 839                 shmdt(tp);
 840                 shmctl(shm_id, IPC_RMID, &sbuf);
 841         }
 842
 843         scleanup();
 844 }
 845
 846 /*
 847  * The thread area is shared between the main process and the job
 848  * threads/processes. So setup a shared memory segment that will hold
 849  * all the job info. We use the end of the region for keeping track of
 850  * open files across jobs, for file sharing.
 851  */
 852 static int setup_thread_area(void)
 853 {
 854         void *hash;
 855
 856         /*
 857          * 1024 is too much on some machines, scale max_jobs if
 858          * we get a failure that looks like too large a shm segment
 859          */
 860         do {
 861                 size_t size = max_jobs * sizeof(struct thread_data);
 862
 863                 size += file_hash_size;
 864                 size += sizeof(unsigned int);
 865
 866                 shm_id = shmget(0, size, IPC_CREAT | 0600);
 867                 if (shm_id != -1)
 868                         break;
 869                 if (errno != EINVAL) {
 870                         perror("shmget");
 871                         break;
 872                 }
 873
 874                 max_jobs >>= 1;
 875         } while (max_jobs);
 876
 877         if (shm_id == -1)
 878                 return 1;
 879
 880         threads = shmat(shm_id, NULL, 0);
 881         if (threads == (void *) -1) {
 882                 perror("shmat");
 883                 return 1;
 884         }
 885
 886         memset(threads, 0, max_jobs * sizeof(struct thread_data));
 887         hash = (void *) threads + max_jobs * sizeof(struct thread_data);
 888         fio_debug_jobp = (void *) hash + file_hash_size;
 889         *fio_debug_jobp = -1;
 890         file_hash_init(hash);
 891         atexit(free_shm);
 892         return 0;
 893 }
 894
 895 static void usage(const char *name)
 896 {
 897         printf("%s\n", fio_version_string);
 898         printf("%s [options] [job options] <job file(s)>\n", name);
 899         printf("\t--debug=options\tEnable debug logging\n");
 900         printf("\t--output\tWrite output to file\n");
 901         printf("\t--timeout\tRuntime in seconds\n");
 902         printf("\t--latency-log\tGenerate per-job latency logs\n");
 903         printf("\t--bandwidth-log\tGenerate per-job bandwidth logs\n");
 904         printf("\t--minimal\tMinimal (terse) output\n");
 905         printf("\t--version\tPrint version info and exit\n");
 906         printf("\t--help\t\tPrint this page\n");
 907         printf("\t--cmdhelp=cmd\tPrint command help, \"all\" for all of"
 908                 " them\n");
 909         printf("\t--showcmd\tTurn a job file into command line options\n");
 910         printf("\t--eta=when\tWhen ETA estimate should be printed\n");
 911         printf("\t          \tMay be \"always\", \"never\" or \"auto\"\n");
 912         printf("\t--readonly\tTurn on safety read-only checks, preventing"
 913                 " writes\n");
 914         printf("\t--section=name\tOnly run specified section in job file\n");
 915         printf("\t--alloc-size=kb\tSet smalloc pool to this size in kb"
 916                 " (def 1024)\n");
 917         printf("\nFio was written by Jens Axboe <jens.axboe@oracle.com>\n");
 918 }
 919
 920 #ifdef FIO_INC_DEBUG
 921 struct debug_level debug_levels[] = {
 922         { .name = "process",    .shift = FD_PROCESS, },
 923         { .name = "file",       .shift = FD_FILE, },
 924         { .name = "io",         .shift = FD_IO, },
 925         { .name = "mem",        .shift = FD_MEM, },
 926         { .name = "blktrace",   .shift = FD_BLKTRACE },
 927         { .name = "verify",     .shift = FD_VERIFY },
 928         { .name = "random",     .shift = FD_RANDOM },
 929         { .name = "parse",      .shift = FD_PARSE },
 930         { .name = "diskutil",   .shift = FD_DISKUTIL },
 931         { .name = "job",        .shift = FD_JOB },
 932         { .name = "mutex",      .shift = FD_MUTEX },
 933         { .name = NULL, },
 934 };
 935
 936 static int set_debug(const char *string)
 937 {
 938         struct debug_level *dl;
 939         char *p = (char *) string;
 940         char *opt;
 941         int i;
 942
 943         if (!strcmp(string, "?") || !strcmp(string, "help")) {
 944                 int i;
 945
 946                 log_info("fio: dumping debug options:");
 947                 for (i = 0; debug_levels[i].name; i++) {
 948                         dl = &debug_levels[i];
 949                         log_info("%s,", dl->name);
 950                 }
 951                 log_info("all\n");
 952                 return 1;
 953         }
 954
 955         while ((opt = strsep(&p, ",")) != NULL) {
 956                 int found = 0;
 957
 958                 if (!strncmp(opt, "all", 3)) {
 959                         log_info("fio: set all debug options\n");
 960                         fio_debug = ~0UL;
 961                         continue;
 962                 }
 963
 964                 for (i = 0; debug_levels[i].name; i++) {
 965                         dl = &debug_levels[i];
 966                         found = !strncmp(opt, dl->name, strlen(dl->name));
 967                         if (!found)
 968                                 continue;
 969
 970                         if (dl->shift == FD_JOB) {
 971                                 opt = strchr(opt, ':');
 972                                 if (!opt) {
 973                                         log_err("fio: missing job number\n");
 974                                         break;
 975                                 }
 976                                 opt++;
 977                                 fio_debug_jobno = atoi(opt);
 978                                 log_info("fio: set debug jobno %d\n",
 979                                                         fio_debug_jobno);
 980                         } else {
 981                                 log_info("fio: set debug option %s\n", opt);
 982                                 fio_debug |= (1UL << dl->shift);
 983                         }
 984                         break;
 985                 }
 986
 987                 if (!found)
 988                         log_err("fio: debug mask %s not found\n", opt);
 989         }
 990         return 0;
 991 }
 992 #else
 993 static int set_debug(const char *string)
 994 {
 995         log_err("fio: debug tracing not included in build\n");
 996         return 1;
 997 }
 998 #endif
 999
1000 static int parse_cmd_line(int argc, char *argv[])
1001 {
1002         struct thread_data *td = NULL;
1003         int c, ini_idx = 0, lidx, ret = 0, do_exit = 0, exit_val = 0;
1004
1005         while ((c = getopt_long_only(argc, argv, "", l_opts, &lidx)) != -1) {
1006                 switch (c) {
1007                 case 'a':
1008                         smalloc_pool_size = atoi(optarg);
1009                         break;
1010                 case 't':
1011                         def_timeout = atoi(optarg);
1012                         break;
1013                 case 'l':
1014                         write_lat_log = 1;
1015                         break;
1016                 case 'w':
1017                         write_bw_log = 1;
1018                         break;
1019                 case 'o':
1020                         f_out = fopen(optarg, "w+");
1021                         if (!f_out) {
1022                                 perror("fopen output");
1023                                 exit(1);
1024                         }
1025                         f_err = f_out;
1026                         break;
1027                 case 'm':
1028                         terse_output = 1;
1029                         break;
1030                 case 'h':
1031                         usage(argv[0]);
1032                         exit(0);
1033                 case 'c':
1034                         exit(fio_show_option_help(optarg));
1035                 case 's':
1036                         dump_cmdline = 1;
1037                         break;
1038                 case 'r':
1039                         read_only = 1;
1040                         break;
1041                 case 'v':
1042                         printf("%s\n", fio_version_string);
1043                         exit(0);
1044                 case 'e':
1045                         if (!strcmp("always", optarg))
1046                                 eta_print = FIO_ETA_ALWAYS;
1047                         else if (!strcmp("never", optarg))
1048                                 eta_print = FIO_ETA_NEVER;
1049                         break;
1050                 case 'd':
1051                         if (set_debug(optarg))
1052                                 do_exit++;
1053                         break;
1054                 case 'x':
1055                         if (!strcmp(optarg, "global")) {
1056                                 log_err("fio: can't use global as only "
1057                                         "section\n");
1058                                 do_exit++;
1059                                 exit_val = 1;
1060                                 break;
1061                         }
1062                         if (job_section)
1063                                 free(job_section);
1064                         job_section = strdup(optarg);
1065                         break;
1066                 case FIO_GETOPT_JOB: {
1067                         const char *opt = l_opts[lidx].name;
1068                         char *val = optarg;
1069
1070                         if (!strncmp(opt, "name", 4) && td) {
1071                                 ret = add_job(td, td->o.name ?: "fio", 0);
1072                                 if (ret) {
1073                                         put_job(td);
1074                                         return 0;
1075                                 }
1076                                 td = NULL;
1077                         }
1078                         if (!td) {
1079                                 int is_section = !strncmp(opt, "name", 4);
1080                                 int global = 0;
1081
1082                                 if (!is_section || !strncmp(val, "global", 6))
1083                                         global = 1;
1084
1085                                 if (is_section && skip_this_section(val))
1086                                         continue;
1087
1088                                 td = get_new_job(global, &def_thread);
1089                                 if (!td)
1090                                         return 0;
1091                         }
1092
1093                         ret = fio_cmd_option_parse(td, opt, val);
1094                         break;
1095                 }
1096                 default:
1097                         do_exit++;
1098                         exit_val = 1;
1099                         break;
1100                 }
1101         }
1102
1103         if (do_exit)
1104                 exit(exit_val);
1105
1106         if (td) {
1107                 if (!ret)
1108                         ret = add_job(td, td->o.name ?: "fio", 0);
1109                 if (ret)
1110                         put_job(td);
1111         }
1112
1113         while (optind < argc) {
1114                 ini_idx++;
1115                 ini_file = realloc(ini_file, ini_idx * sizeof(char *));
1116                 ini_file[ini_idx - 1] = strdup(argv[optind]);
1117                 optind++;
1118         }
1119
1120         return ini_idx;
1121 }
1122
1123 int parse_options(int argc, char *argv[])
1124 {
1125         int job_files, i;
1126
1127         f_out = stdout;
1128         f_err = stderr;
1129
1130         fio_options_dup_and_init(l_opts);
1131
1132         if (setup_thread_area())
1133                 return 1;
1134         if (fill_def_thread())
1135                 return 1;
1136
1137         job_files = parse_cmd_line(argc, argv);
1138
1139         for (i = 0; i < job_files; i++) {
1140                 if (fill_def_thread())
1141                         return 1;
1142                 if (parse_jobs_ini(ini_file[i], i))
1143                         return 1;
1144                 free(ini_file[i]);
1145         }
1146
1147         free(ini_file);
1148         options_mem_free(&def_thread);
1149
1150         if (!thread_number) {
1151                 if (dump_cmdline)
1152                         return 0;
1153
1154                 log_err("No jobs defined(s)\n\n");
1155                 usage(argv[0]);
1156                 return 1;
1157         }
1158
1159         if (def_thread.o.gtod_offload) {
1160                 fio_gtod_init();
1161                 fio_gtod_offload = 1;
1162                 fio_gtod_cpu = def_thread.o.gtod_cpu;
1163         }
1164
1165         return 0;
1166 }