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
  22 static char fio_version_string[] = "fio 1.20";
  23
  24 #define FIO_RANDSEED            (0xb1899bedUL)
  25
  26 static char **ini_file;
  27 static int max_jobs = MAX_JOBS;
  28 static int dump_cmdline;
  29
  30 struct thread_data def_thread;
  31 struct thread_data *threads = NULL;
  32
  33 int exitall_on_terminate = 0;
  34 int terse_output = 0;
  35 int eta_print;
  36 unsigned long long mlock_size = 0;
  37 FILE *f_out = NULL;
  38 FILE *f_err = NULL;
  39 char *job_section = NULL;
  40
  41 int write_bw_log = 0;
  42 int read_only = 0;
  43
  44 static int def_timeout;
  45 static int write_lat_log;
  46
  47 static int prev_group_jobs;
  48
  49 unsigned long fio_debug = 0;
  50
  51 /*
  52  * Command line options. These will contain the above, plus a few
  53  * extra that only pertain to fio itself and not jobs.
  54  */
  55 static struct option l_opts[FIO_NR_OPTIONS] = {
  56         {
  57                 .name           = "output",
  58                 .has_arg        = required_argument,
  59                 .val            = 'o',
  60         },
  61         {
  62                 .name           = "timeout",
  63                 .has_arg        = required_argument,
  64                 .val            = 't',
  65         },
  66         {
  67                 .name           = "latency-log",
  68                 .has_arg        = required_argument,
  69                 .val            = 'l',
  70         },
  71         {
  72                 .name           = "bandwidth-log",
  73                 .has_arg        = required_argument,
  74                 .val            = 'b',
  75         },
  76         {
  77                 .name           = "minimal",
  78                 .has_arg        = optional_argument,
  79                 .val            = 'm',
  80         },
  81         {
  82                 .name           = "version",
  83                 .has_arg        = no_argument,
  84                 .val            = 'v',
  85         },
  86         {
  87                 .name           = "help",
  88                 .has_arg        = no_argument,
  89                 .val            = 'h',
  90         },
  91         {
  92                 .name           = "cmdhelp",
  93                 .has_arg        = optional_argument,
  94                 .val            = 'c',
  95         },
  96         {
  97                 .name           = "showcmd",
  98                 .has_arg        = no_argument,
  99                 .val            = 's',
 100         },
 101         {
 102                 .name           = "readonly",
 103                 .has_arg        = no_argument,
 104                 .val            = 'r',
 105         },
 106         {
 107                 .name           = "eta",
 108                 .has_arg        = required_argument,
 109                 .val            = 'e',
 110         },
 111         {
 112                 .name           = "debug",
 113                 .has_arg        = required_argument,
 114                 .val            = 'd',
 115         },
 116         {
 117                 .name           = "section",
 118                 .has_arg        = required_argument,
 119                 .val            = 'x',
 120         },
 121         {
 122                 .name           = "alloc-size",
 123                 .has_arg        = required_argument,
 124                 .val            = 'a',
 125         },
 126         {
 127                 .name           = NULL,
 128         },
 129 };
 130
 131 FILE *get_f_out()
 132 {
 133         return f_out;
 134 }
 135
 136 FILE *get_f_err()
 137 {
 138         return f_err;
 139 }
 140
 141 /*
 142  * Return a free job structure.
 143  */
 144 static struct thread_data *get_new_job(int global, struct thread_data *parent)
 145 {
 146         struct thread_data *td;
 147
 148         if (global)
 149                 return &def_thread;
 150         if (thread_number >= max_jobs)
 151                 return NULL;
 152
 153         td = &threads[thread_number++];
 154         *td = *parent;
 155
 156         dup_files(td, parent);
 157         options_mem_dupe(td);
 158
 159         td->thread_number = thread_number;
 160         return td;
 161 }
 162
 163 static void put_job(struct thread_data *td)
 164 {
 165         if (td == &def_thread)
 166                 return;
 167
 168         if (td->error)
 169                 log_info("fio: %s\n", td->verror);
 170
 171         memset(&threads[td->thread_number - 1], 0, sizeof(*td));
 172         thread_number--;
 173 }
 174
 175 static int setup_rate(struct thread_data *td)
 176 {
 177         unsigned long nr_reads_per_msec;
 178         unsigned long long rate;
 179         unsigned int bs;
 180
 181         if (!td->o.rate && !td->o.rate_iops)
 182                 return 0;
 183
 184         if (td_rw(td))
 185                 bs = td->o.rw_min_bs;
 186         else if (td_read(td))
 187                 bs = td->o.min_bs[DDIR_READ];
 188         else
 189                 bs = td->o.min_bs[DDIR_WRITE];
 190
 191         if (td->o.rate) {
 192                 rate = td->o.rate;
 193                 nr_reads_per_msec = (rate * 1024 * 1000LL) / bs;
 194         } else
 195                 nr_reads_per_msec = td->o.rate_iops * 1000UL;
 196
 197         if (!nr_reads_per_msec) {
 198                 log_err("rate lower than supported\n");
 199                 return -1;
 200         }
 201
 202         td->rate_usec_cycle = 1000000000ULL / nr_reads_per_msec;
 203         td->rate_pending_usleep = 0;
 204         return 0;
 205 }
 206
 207 /*
 208  * Lazy way of fixing up options that depend on each other. We could also
 209  * define option callback handlers, but this is easier.
 210  */
 211 static int fixup_options(struct thread_data *td)
 212 {
 213         struct thread_options *o = &td->o;
 214
 215         if (read_only && td_write(td)) {
 216                 log_err("fio: job <%s> has write bit set, but fio is in"
 217                         " read-only mode\n", td->o.name);
 218                 return 1;
 219         }
 220
 221         if (o->rwmix[DDIR_READ] + o->rwmix[DDIR_WRITE] > 100)
 222                 o->rwmix[DDIR_WRITE] = 100 - o->rwmix[DDIR_READ];
 223
 224         if (o->write_iolog_file && o->read_iolog_file) {
 225                 log_err("fio: read iolog overrides write_iolog\n");
 226                 free(o->write_iolog_file);
 227                 o->write_iolog_file = NULL;
 228         }
 229
 230         /*
 231          * only really works for sequential io for now, and with 1 file
 232          */
 233         if (o->zone_size && td_random(td) && o->open_files == 1)
 234                 o->zone_size = 0;
 235
 236         /*
 237          * Reads can do overwrites, we always need to pre-create the file
 238          */
 239         if (td_read(td) || td_rw(td))
 240                 o->overwrite = 1;
 241
 242         if (!o->min_bs[DDIR_READ])
 243                 o->min_bs[DDIR_READ] = o->bs[DDIR_READ];
 244         if (!o->max_bs[DDIR_READ])
 245                 o->max_bs[DDIR_READ] = o->bs[DDIR_READ];
 246         if (!o->min_bs[DDIR_WRITE])
 247                 o->min_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 248         if (!o->max_bs[DDIR_WRITE])
 249                 o->max_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 250
 251         o->rw_min_bs = min(o->min_bs[DDIR_READ], o->min_bs[DDIR_WRITE]);
 252
 253         if (!o->file_size_high)
 254                 o->file_size_high = o->file_size_low;
 255
 256         if (o->norandommap && o->verify != VERIFY_NONE) {
 257                 log_err("fio: norandommap given, verify disabled\n");
 258                 o->verify = VERIFY_NONE;
 259         }
 260         if (o->bs_unaligned && (o->odirect || td->io_ops->flags & FIO_RAWIO))
 261                 log_err("fio: bs_unaligned may not work with raw io\n");
 262
 263         /*
 264          * thinktime_spin must be less than thinktime
 265          */
 266         if (o->thinktime_spin > o->thinktime)
 267                 o->thinktime_spin = o->thinktime;
 268
 269         /*
 270          * The low water mark cannot be bigger than the iodepth
 271          */
 272         if (o->iodepth_low > o->iodepth || !o->iodepth_low) {
 273                 /*
 274                  * syslet work around - if the workload is sequential,
 275                  * we want to let the queue drain all the way down to
 276                  * avoid seeking between async threads
 277                  */
 278                 if (!strcmp(td->io_ops->name, "syslet-rw") && !td_random(td))
 279                         o->iodepth_low = 1;
 280                 else
 281                         o->iodepth_low = o->iodepth;
 282         }
 283
 284         /*
 285          * If batch number isn't set, default to the same as iodepth
 286          */
 287         if (o->iodepth_batch > o->iodepth || !o->iodepth_batch)
 288                 o->iodepth_batch = o->iodepth;
 289
 290         if (o->nr_files > td->files_index)
 291                 o->nr_files = td->files_index;
 292
 293         if (o->open_files > o->nr_files || !o->open_files)
 294                 o->open_files = o->nr_files;
 295
 296         if ((o->rate && o->rate_iops) || (o->ratemin && o->rate_iops_min)) {
 297                 log_err("fio: rate and rate_iops are mutually exclusive\n");
 298                 return 1;
 299         }
 300         if ((o->rate < o->ratemin) || (o->rate_iops < o->rate_iops_min)) {
 301                 log_err("fio: minimum rate exceeds rate\n");
 302                 return 1;
 303         }
 304
 305         if (!o->timeout && o->time_based) {
 306                 log_err("fio: time_based requires a runtime/timeout setting\n");
 307                 o->time_based = 0;
 308         }
 309
 310         if (o->fill_device && !o->size)
 311                 o->size = ULONG_LONG_MAX;
 312
 313         if (td_rw(td) && td->o.verify != VERIFY_NONE)
 314                 log_info("fio: mixed read/write workload with verify. May not "
 315                  "work as expected, unless you pre-populated the file\n");
 316
 317         if (td->o.verify != VERIFY_NONE)
 318                 td->o.refill_buffers = 1;
 319
 320         return 0;
 321 }
 322
 323 /*
 324  * This function leaks the buffer
 325  */
 326 static char *to_kmg(unsigned int val)
 327 {
 328         char *buf = malloc(32);
 329         char post[] = { 0, 'K', 'M', 'G', 'P', 'E', 0 };
 330         char *p = post;
 331
 332         do {
 333                 if (val & 1023)
 334                         break;
 335
 336                 val >>= 10;
 337                 p++;
 338         } while (*p);
 339
 340         snprintf(buf, 31, "%u%c", val, *p);
 341         return buf;
 342 }
 343
 344 /* External engines are specified by "external:name.o") */
 345 static const char *get_engine_name(const char *str)
 346 {
 347         char *p = strstr(str, ":");
 348
 349         if (!p)
 350                 return str;
 351
 352         p++;
 353         strip_blank_front(&p);
 354         strip_blank_end(p);
 355         return p;
 356 }
 357
 358 static int exists_and_not_file(const char *filename)
 359 {
 360         struct stat sb;
 361
 362         if (lstat(filename, &sb) == -1)
 363                 return 0;
 364
 365         if (S_ISREG(sb.st_mode))
 366                 return 0;
 367
 368         return 1;
 369 }
 370
 371 /*
 372  * Initialize the various random states we need (random io, block size ranges,
 373  * read/write mix, etc).
 374  */
 375 static int init_random_state(struct thread_data *td)
 376 {
 377         unsigned long seeds[6];
 378         int fd;
 379
 380         fd = open("/dev/urandom", O_RDONLY);
 381         if (fd == -1) {
 382                 td_verror(td, errno, "open");
 383                 return 1;
 384         }
 385
 386         if (read(fd, seeds, sizeof(seeds)) < (int) sizeof(seeds)) {
 387                 td_verror(td, EIO, "read");
 388                 close(fd);
 389                 return 1;
 390         }
 391
 392         close(fd);
 393
 394         os_random_seed(seeds[0], &td->bsrange_state);
 395         os_random_seed(seeds[1], &td->verify_state);
 396         os_random_seed(seeds[2], &td->rwmix_state);
 397
 398         if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
 399                 os_random_seed(seeds[3], &td->next_file_state);
 400
 401         os_random_seed(seeds[5], &td->file_size_state);
 402
 403         if (!td_random(td))
 404                 return 0;
 405
 406         if (td->o.rand_repeatable)
 407                 seeds[4] = FIO_RANDSEED * td->thread_number;
 408
 409         os_random_seed(seeds[4], &td->random_state);
 410         return 0;
 411 }
 412
 413 /*
 414  * Adds a job to the list of things todo. Sanitizes the various options
 415  * to make sure we don't have conflicts, and initializes various
 416  * members of td.
 417  */
 418 static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
 419 {
 420         const char *ddir_str[] = { NULL, "read", "write", "rw", NULL,
 421                                    "randread", "randwrite", "randrw" };
 422         unsigned int i;
 423         const char *engine;
 424         char fname[PATH_MAX];
 425         int numjobs, file_alloced;
 426
 427         /*
 428          * the def_thread is just for options, it's not a real job
 429          */
 430         if (td == &def_thread)
 431                 return 0;
 432
 433         /*
 434          * if we are just dumping the output command line, don't add the job
 435          */
 436         if (dump_cmdline) {
 437                 put_job(td);
 438                 return 0;
 439         }
 440
 441         engine = get_engine_name(td->o.ioengine);
 442         td->io_ops = load_ioengine(td, engine);
 443         if (!td->io_ops) {
 444                 log_err("fio: failed to load engine %s\n", engine);
 445                 goto err;
 446         }
 447
 448         if (td->o.use_thread)
 449                 nr_thread++;
 450         else
 451                 nr_process++;
 452
 453         if (td->o.odirect)
 454                 td->io_ops->flags |= FIO_RAWIO;
 455
 456         file_alloced = 0;
 457         if (!td->o.filename && !td->files_index && !td->o.read_iolog_file) {
 458                 file_alloced = 1;
 459
 460                 if (td->o.nr_files == 1 && exists_and_not_file(jobname))
 461                         add_file(td, jobname);
 462                 else {
 463                         for (i = 0; i < td->o.nr_files; i++) {
 464                                 sprintf(fname, "%s.%d.%d", jobname,
 465                                                         td->thread_number, i);
 466                                 add_file(td, fname);
 467                         }
 468                 }
 469         }
 470
 471         if (fixup_options(td))
 472                 goto err;
 473
 474         if (td->io_ops->flags & FIO_DISKLESSIO) {
 475                 struct fio_file *f;
 476
 477                 for_each_file(td, f, i)
 478                         f->real_file_size = -1ULL;
 479         }
 480
 481         td->mutex = fio_mutex_init(0);
 482
 483         td->ts.clat_stat[0].min_val = td->ts.clat_stat[1].min_val = ULONG_MAX;
 484         td->ts.slat_stat[0].min_val = td->ts.slat_stat[1].min_val = ULONG_MAX;
 485         td->ts.bw_stat[0].min_val = td->ts.bw_stat[1].min_val = ULONG_MAX;
 486         td->ddir_nr = td->o.ddir_nr;
 487
 488         if ((td->o.stonewall || td->o.numjobs > 1 || td->o.new_group)
 489              && prev_group_jobs) {
 490                 prev_group_jobs = 0;
 491                 groupid++;
 492         }
 493
 494         td->groupid = groupid;
 495         prev_group_jobs++;
 496
 497         if (init_random_state(td))
 498                 goto err;
 499
 500         if (setup_rate(td))
 501                 goto err;
 502
 503         if (td->o.write_lat_log) {
 504                 setup_log(&td->ts.slat_log);
 505                 setup_log(&td->ts.clat_log);
 506         }
 507         if (td->o.write_bw_log)
 508                 setup_log(&td->ts.bw_log);
 509
 510         if (!td->o.name)
 511                 td->o.name = strdup(jobname);
 512
 513         if (!terse_output) {
 514                 if (!job_add_num) {
 515                         if (!strcmp(td->io_ops->name, "cpuio")) {
 516                                 log_info("%s: ioengine=cpu, cpuload=%u,"
 517                                          " cpucycle=%u\n", td->o.name,
 518                                                         td->o.cpuload,
 519                                                         td->o.cpucycle);
 520                         } else {
 521                                 char *c1, *c2, *c3, *c4;
 522
 523                                 c1 = to_kmg(td->o.min_bs[DDIR_READ]);
 524                                 c2 = to_kmg(td->o.max_bs[DDIR_READ]);
 525                                 c3 = to_kmg(td->o.min_bs[DDIR_WRITE]);
 526                                 c4 = to_kmg(td->o.max_bs[DDIR_WRITE]);
 527
 528                                 log_info("%s: (g=%d): rw=%s, bs=%s-%s/%s-%s,"
 529                                          " ioengine=%s, iodepth=%u\n",
 530                                                 td->o.name, td->groupid,
 531                                                 ddir_str[td->o.td_ddir],
 532                                                 c1, c2, c3, c4,
 533                                                 td->io_ops->name,
 534                                                 td->o.iodepth);
 535
 536                                 free(c1);
 537                                 free(c2);
 538                                 free(c3);
 539                                 free(c4);
 540                         }
 541                 } else if (job_add_num == 1)
 542                         log_info("...\n");
 543         }
 544
 545         /*
 546          * recurse add identical jobs, clear numjobs and stonewall options
 547          * as they don't apply to sub-jobs
 548          */
 549         numjobs = td->o.numjobs;
 550         while (--numjobs) {
 551                 struct thread_data *td_new = get_new_job(0, td);
 552
 553                 if (!td_new)
 554                         goto err;
 555
 556                 td_new->o.numjobs = 1;
 557                 td_new->o.stonewall = 0;
 558                 td_new->o.new_group = 0;
 559
 560                 if (file_alloced) {
 561                         td_new->o.filename = NULL;
 562                         td_new->files_index = 0;
 563                         td_new->files = NULL;
 564                 }
 565
 566                 job_add_num = numjobs - 1;
 567
 568                 if (add_job(td_new, jobname, job_add_num))
 569                         goto err;
 570         }
 571
 572         return 0;
 573 err:
 574         put_job(td);
 575         return -1;
 576 }
 577
 578 static int skip_this_section(const char *name)
 579 {
 580         if (!job_section)
 581                 return 0;
 582         if (!strncmp(name, "global", 6))
 583                 return 0;
 584
 585         return strncmp(job_section, name, strlen(job_section));
 586 }
 587
 588 static int is_empty_or_comment(char *line)
 589 {
 590         unsigned int i;
 591
 592         for (i = 0; i < strlen(line); i++) {
 593                 if (line[i] == ';')
 594                         return 1;
 595                 if (line[i] == '#')
 596                         return 1;
 597                 if (!isspace(line[i]) && !iscntrl(line[i]))
 598                         return 0;
 599         }
 600
 601         return 1;
 602 }
 603
 604 /*
 605  * This is our [ini] type file parser.
 606  */
 607 static int parse_jobs_ini(char *file, int stonewall_flag)
 608 {
 609         unsigned int global;
 610         struct thread_data *td;
 611         char *string, *name;
 612         FILE *f;
 613         char *p;
 614         int ret = 0, stonewall;
 615         int first_sect = 1;
 616         int skip_fgets = 0;
 617         int inside_skip = 0;
 618
 619         if (!strcmp(file, "-"))
 620                 f = stdin;
 621         else
 622                 f = fopen(file, "r");
 623
 624         if (!f) {
 625                 perror("fopen job file");
 626                 return 1;
 627         }
 628
 629         string = malloc(4096);
 630
 631         /*
 632          * it's really 256 + small bit, 280 should suffice
 633          */
 634         name = malloc(280);
 635         memset(name, 0, 280);
 636
 637         stonewall = stonewall_flag;
 638         do {
 639                 /*
 640                  * if skip_fgets is set, we already have loaded a line we
 641                  * haven't handled.
 642                  */
 643                 if (!skip_fgets) {
 644                         p = fgets(string, 4095, f);
 645                         if (!p)
 646                                 break;
 647                 }
 648
 649                 skip_fgets = 0;
 650                 strip_blank_front(&p);
 651                 strip_blank_end(p);
 652
 653                 if (is_empty_or_comment(p))
 654                         continue;
 655                 if (sscanf(p, "[%255s]", name) != 1) {
 656                         if (inside_skip)
 657                                 continue;
 658                         log_err("fio: option <%s> outside of [] job section\n",
 659                                                                         p);
 660                         break;
 661                 }
 662
 663                 if (skip_this_section(name)) {
 664                         inside_skip = 1;
 665                         continue;
 666                 } else
 667                         inside_skip = 0;
 668
 669                 global = !strncmp(name, "global", 6);
 670
 671                 name[strlen(name) - 1] = '\0';
 672
 673                 if (dump_cmdline) {
 674                         if (first_sect)
 675                                 log_info("fio ");
 676                         if (!global)
 677                                 log_info("--name=%s ", name);
 678                         first_sect = 0;
 679                 }
 680
 681                 td = get_new_job(global, &def_thread);
 682                 if (!td) {
 683                         ret = 1;
 684                         break;
 685                 }
 686
 687                 /*
 688                  * Seperate multiple job files by a stonewall
 689                  */
 690                 if (!global && stonewall) {
 691                         td->o.stonewall = stonewall;
 692                         stonewall = 0;
 693                 }
 694
 695                 while ((p = fgets(string, 4096, f)) != NULL) {
 696                         if (is_empty_or_comment(p))
 697                                 continue;
 698
 699                         strip_blank_front(&p);
 700
 701                         /*
 702                          * new section, break out and make sure we don't
 703                          * fgets() a new line at the top.
 704                          */
 705                         if (p[0] == '[') {
 706                                 skip_fgets = 1;
 707                                 break;
 708                         }
 709
 710                         strip_blank_end(p);
 711
 712                         /*
 713                          * Don't break here, continue parsing options so we
 714                          * dump all the bad ones. Makes trial/error fixups
 715                          * easier on the user.
 716                          */
 717                         ret |= fio_option_parse(td, p);
 718                         if (!ret && dump_cmdline)
 719                                 log_info("--%s ", p);
 720                 }
 721
 722                 if (!ret)
 723                         ret = add_job(td, name, 0);
 724                 else {
 725                         log_err("fio: job %s dropped\n", name);
 726                         put_job(td);
 727                 }
 728         } while (!ret);
 729
 730         if (dump_cmdline)
 731                 log_info("\n");
 732
 733         free(string);
 734         free(name);
 735         if (f != stdin)
 736                 fclose(f);
 737         return ret;
 738 }
 739
 740 static int fill_def_thread(void)
 741 {
 742         memset(&def_thread, 0, sizeof(def_thread));
 743
 744         fio_getaffinity(getpid(), &def_thread.o.cpumask);
 745
 746         /*
 747          * fill default options
 748          */
 749         fio_fill_default_options(&def_thread);
 750
 751         def_thread.o.timeout = def_timeout;
 752         def_thread.o.write_bw_log = write_bw_log;
 753         def_thread.o.write_lat_log = write_lat_log;
 754
 755         return 0;
 756 }
 757
 758 static void free_shm(void)
 759 {
 760         struct shmid_ds sbuf;
 761
 762         if (threads) {
 763                 shmdt((void *) threads);
 764                 threads = NULL;
 765                 shmctl(shm_id, IPC_RMID, &sbuf);
 766         }
 767
 768         scleanup();
 769 }
 770
 771 /*
 772  * The thread area is shared between the main process and the job
 773  * threads/processes. So setup a shared memory segment that will hold
 774  * all the job info. We use the end of the region for keeping track of
 775  * open files across jobs, for file sharing.
 776  */
 777 static int setup_thread_area(void)
 778 {
 779         void *hash;
 780
 781         /*
 782          * 1024 is too much on some machines, scale max_jobs if
 783          * we get a failure that looks like too large a shm segment
 784          */
 785         do {
 786                 size_t size = max_jobs * sizeof(struct thread_data);
 787
 788                 size += file_hash_size;
 789
 790                 shm_id = shmget(0, size, IPC_CREAT | 0600);
 791                 if (shm_id != -1)
 792                         break;
 793                 if (errno != EINVAL) {
 794                         perror("shmget");
 795                         break;
 796                 }
 797
 798                 max_jobs >>= 1;
 799         } while (max_jobs);
 800
 801         if (shm_id == -1)
 802                 return 1;
 803
 804         threads = shmat(shm_id, NULL, 0);
 805         if (threads == (void *) -1) {
 806                 perror("shmat");
 807                 return 1;
 808         }
 809
 810         memset(threads, 0, max_jobs * sizeof(struct thread_data));
 811         hash = (void *) threads + max_jobs * sizeof(struct thread_data);
 812         file_hash_init(hash);
 813         atexit(free_shm);
 814         return 0;
 815 }
 816
 817 static void usage(const char *name)
 818 {
 819         printf("%s\n", fio_version_string);
 820         printf("%s [options] [job options] <job file(s)>\n", name);
 821         printf("\t--debug=options\tEnable debug logging\n");
 822         printf("\t--output\tWrite output to file\n");
 823         printf("\t--timeout\tRuntime in seconds\n");
 824         printf("\t--latency-log\tGenerate per-job latency logs\n");
 825         printf("\t--bandwidth-log\tGenerate per-job bandwidth logs\n");
 826         printf("\t--minimal\tMinimal (terse) output\n");
 827         printf("\t--version\tPrint version info and exit\n");
 828         printf("\t--help\t\tPrint this page\n");
 829         printf("\t--cmdhelp=cmd\tPrint command help, \"all\" for all of"
 830                 " them\n");
 831         printf("\t--showcmd\tTurn a job file into command line options\n");
 832         printf("\t--eta=when\tWhen ETA estimate should be printed\n");
 833         printf("\t          \tMay be \"always\", \"never\" or \"auto\"\n");
 834         printf("\t--readonly\tTurn on safety read-only checks, preventing"
 835                 " writes\n");
 836         printf("\t--section=name\tOnly run specified section in job file\n");
 837         printf("\t--alloc-size=kb\tSet smalloc pool to this size in kb"
 838                 " (def 1024)\n");
 839 }
 840
 841 #ifdef FIO_INC_DEBUG
 842 struct debug_level debug_levels[] = {
 843         { .name = "process",    .shift = FD_PROCESS, },
 844         { .name = "file",       .shift = FD_FILE, },
 845         { .name = "io",         .shift = FD_IO, },
 846         { .name = "mem",        .shift = FD_MEM, },
 847         { .name = "blktrace",   .shift = FD_BLKTRACE },
 848         { .name = "verify",     .shift = FD_VERIFY },
 849         { .name = "random",     .shift = FD_RANDOM },
 850         { .name = "parse",      .shift = FD_PARSE },
 851         { .name = "diskutil",   .shift = FD_DISKUTIL },
 852         { },
 853 };
 854
 855 static int set_debug(const char *string)
 856 {
 857         struct debug_level *dl;
 858         char *p = (char *) string;
 859         char *opt;
 860         int i;
 861
 862         if (!strcmp(string, "?") || !strcmp(string, "help")) {
 863                 int i;
 864
 865                 log_info("fio: dumping debug options:");
 866                 for (i = 0; debug_levels[i].name; i++) {
 867                         dl = &debug_levels[i];
 868                         log_info("%s,", dl->name);
 869                 }
 870                 log_info("all\n");
 871                 return 1;
 872         } else if (!strcmp(string, "all")) {
 873                 fio_debug = ~0UL;
 874                 return 0;
 875         }
 876
 877         while ((opt = strsep(&p, ",")) != NULL) {
 878                 int found = 0;
 879
 880                 for (i = 0; debug_levels[i].name; i++) {
 881                         dl = &debug_levels[i];
 882                         if (!strncmp(opt, dl->name, strlen(opt))) {
 883                                 log_info("fio: set debug option %s\n", opt);
 884                                 found = 1;
 885                                 fio_debug |= (1UL << dl->shift);
 886                                 break;
 887                         }
 888                 }
 889
 890                 if (!found)
 891                         log_err("fio: debug mask %s not found\n", opt);
 892         }
 893         return 0;
 894 }
 895 #else
 896 static void set_debug(const char *string)
 897 {
 898         log_err("fio: debug tracing not included in build\n");
 899         return 1;
 900 }
 901 #endif
 902
 903 static int parse_cmd_line(int argc, char *argv[])
 904 {
 905         struct thread_data *td = NULL;
 906         int c, ini_idx = 0, lidx, ret = 0, do_exit = 0, exit_val = 0;
 907
 908         while ((c = getopt_long_only(argc, argv, "", l_opts, &lidx)) != -1) {
 909                 switch (c) {
 910                 case 'a':
 911                         smalloc_pool_size = atoi(optarg);
 912                         break;
 913                 case 't':
 914                         def_timeout = atoi(optarg);
 915                         break;
 916                 case 'l':
 917                         write_lat_log = 1;
 918                         break;
 919                 case 'w':
 920                         write_bw_log = 1;
 921                         break;
 922                 case 'o':
 923                         f_out = fopen(optarg, "w+");
 924                         if (!f_out) {
 925                                 perror("fopen output");
 926                                 exit(1);
 927                         }
 928                         f_err = f_out;
 929                         break;
 930                 case 'm':
 931                         terse_output = 1;
 932                         break;
 933                 case 'h':
 934                         usage(argv[0]);
 935                         exit(0);
 936                 case 'c':
 937                         exit(fio_show_option_help(optarg));
 938                 case 's':
 939                         dump_cmdline = 1;
 940                         break;
 941                 case 'r':
 942                         read_only = 1;
 943                         break;
 944                 case 'v':
 945                         printf("%s\n", fio_version_string);
 946                         exit(0);
 947                 case 'e':
 948                         if (!strcmp("always", optarg))
 949                                 eta_print = FIO_ETA_ALWAYS;
 950                         else if (!strcmp("never", optarg))
 951                                 eta_print = FIO_ETA_NEVER;
 952                         break;
 953                 case 'd':
 954                         if (set_debug(optarg))
 955                                 do_exit++;
 956                         break;
 957                 case 'x':
 958                         if (!strcmp(optarg, "global")) {
 959                                 log_err("fio: can't use global as only "
 960                                         "section\n");
 961                                 do_exit++;
 962                                 exit_val = 1;
 963                                 break;
 964                         }
 965                         if (job_section)
 966                                 free(job_section);
 967                         job_section = strdup(optarg);
 968                         break;
 969                 case FIO_GETOPT_JOB: {
 970                         const char *opt = l_opts[lidx].name;
 971                         char *val = optarg;
 972
 973                         if (!strncmp(opt, "name", 4) && td) {
 974                                 ret = add_job(td, td->o.name ?: "fio", 0);
 975                                 if (ret) {
 976                                         put_job(td);
 977                                         return 0;
 978                                 }
 979                                 td = NULL;
 980                         }
 981                         if (!td) {
 982                                 int is_section = !strncmp(opt, "name", 4);
 983                                 int global = 0;
 984
 985                                 if (!is_section || !strncmp(val, "global", 6))
 986                                         global = 1;
 987
 988                                 if (is_section && skip_this_section(val))
 989                                         continue;
 990
 991                                 td = get_new_job(global, &def_thread);
 992                                 if (!td)
 993                                         return 0;
 994                         }
 995
 996                         ret = fio_cmd_option_parse(td, opt, val);
 997                         break;
 998                 }
 999                 default:
1000                         do_exit++;
1001                         exit_val = 1;
1002                         break;
1003                 }
1004         }
1005
1006         if (do_exit)
1007                 exit(exit_val);
1008
1009         if (td) {
1010                 if (!ret)
1011                         ret = add_job(td, td->o.name ?: "fio", 0);
1012                 if (ret)
1013                         put_job(td);
1014         }
1015
1016         while (optind < argc) {
1017                 ini_idx++;
1018                 ini_file = realloc(ini_file, ini_idx * sizeof(char *));
1019                 ini_file[ini_idx - 1] = strdup(argv[optind]);
1020                 optind++;
1021         }
1022
1023         return ini_idx;
1024 }
1025
1026 int parse_options(int argc, char *argv[])
1027 {
1028         int job_files, i;
1029
1030         f_out = stdout;
1031         f_err = stderr;
1032
1033         fio_options_dup_and_init(l_opts);
1034
1035         if (setup_thread_area())
1036                 return 1;
1037         if (fill_def_thread())
1038                 return 1;
1039
1040         job_files = parse_cmd_line(argc, argv);
1041
1042         for (i = 0; i < job_files; i++) {
1043                 if (fill_def_thread())
1044                         return 1;
1045                 if (parse_jobs_ini(ini_file[i], i))
1046                         return 1;
1047                 free(ini_file[i]);
1048         }
1049
1050         free(ini_file);
1051         options_mem_free(&def_thread);
1052
1053         if (!thread_number) {
1054                 if (dump_cmdline)
1055                         return 0;
1056
1057                 log_err("No jobs defined(s)\n");
1058                 usage(argv[0]);
1059                 return 1;
1060         }
1061
1062         return 0;
1063 }