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 1.19";
  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 = 0;
  45 static int write_lat_log = 0;
  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 long_options[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           = NULL,
 123         },
 124 };
 125
 126 FILE *get_f_out()
 127 {
 128         return f_out;
 129 }
 130
 131 FILE *get_f_err()
 132 {
 133         return f_err;
 134 }
 135
 136 /*
 137  * Return a free job structure.
 138  */
 139 static struct thread_data *get_new_job(int global, struct thread_data *parent)
 140 {
 141         struct thread_data *td;
 142
 143         if (global)
 144                 return &def_thread;
 145         if (thread_number >= max_jobs)
 146                 return NULL;
 147
 148         td = &threads[thread_number++];
 149         *td = *parent;
 150
 151         dup_files(td, parent);
 152         options_mem_dupe(td);
 153
 154         td->thread_number = thread_number;
 155         return td;
 156 }
 157
 158 static void put_job(struct thread_data *td)
 159 {
 160         if (td == &def_thread)
 161                 return;
 162
 163         if (td->error)
 164                 log_info("fio: %s\n", td->verror);
 165
 166         memset(&threads[td->thread_number - 1], 0, sizeof(*td));
 167         thread_number--;
 168 }
 169
 170 static int setup_rate(struct thread_data *td)
 171 {
 172         unsigned long nr_reads_per_msec;
 173         unsigned long long rate;
 174         unsigned int bs;
 175
 176         if (!td->o.rate && !td->o.rate_iops)
 177                 return 0;
 178
 179         if (td_rw(td))
 180                 bs = td->o.rw_min_bs;
 181         else if (td_read(td))
 182                 bs = td->o.min_bs[DDIR_READ];
 183         else
 184                 bs = td->o.min_bs[DDIR_WRITE];
 185
 186         if (td->o.rate) {
 187                 rate = td->o.rate;
 188                 nr_reads_per_msec = (rate * 1024 * 1000LL) / bs;
 189         } else
 190                 nr_reads_per_msec = td->o.rate_iops * 1000UL;
 191
 192         if (!nr_reads_per_msec) {
 193                 log_err("rate lower than supported\n");
 194                 return -1;
 195         }
 196
 197         td->rate_usec_cycle = 1000000000ULL / nr_reads_per_msec;
 198         td->rate_pending_usleep = 0;
 199         return 0;
 200 }
 201
 202 /*
 203  * Lazy way of fixing up options that depend on each other. We could also
 204  * define option callback handlers, but this is easier.
 205  */
 206 static int fixup_options(struct thread_data *td)
 207 {
 208         struct thread_options *o = &td->o;
 209
 210         if (read_only && td_write(td)) {
 211                 log_err("fio: job <%s> has write bit set, but fio is in read-only mode\n", td->o.name);
 212                 return 1;
 213         }
 214
 215         if (o->rwmix[DDIR_READ] + o->rwmix[DDIR_WRITE] > 100)
 216                 o->rwmix[DDIR_WRITE] = 100 - o->rwmix[DDIR_READ];
 217
 218         if (o->write_iolog_file && o->read_iolog_file) {
 219                 log_err("fio: read iolog overrides write_iolog\n");
 220                 free(o->write_iolog_file);
 221                 o->write_iolog_file = NULL;
 222         }
 223
 224         /*
 225          * only really works for sequential io for now, and with 1 file
 226          */
 227         if (o->zone_size && td_random(td) && o->open_files == 1)
 228                 o->zone_size = 0;
 229
 230         /*
 231          * Reads can do overwrites, we always need to pre-create the file
 232          */
 233         if (td_read(td) || td_rw(td))
 234                 o->overwrite = 1;
 235
 236         if (!o->min_bs[DDIR_READ])
 237                 o->min_bs[DDIR_READ]= o->bs[DDIR_READ];
 238         if (!o->max_bs[DDIR_READ])
 239                 o->max_bs[DDIR_READ] = o->bs[DDIR_READ];
 240         if (!o->min_bs[DDIR_WRITE])
 241                 o->min_bs[DDIR_WRITE]= o->bs[DDIR_WRITE];
 242         if (!o->max_bs[DDIR_WRITE])
 243                 o->max_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 244
 245         o->rw_min_bs = min(o->min_bs[DDIR_READ], o->min_bs[DDIR_WRITE]);
 246
 247         if (!o->file_size_high)
 248                 o->file_size_high = o->file_size_low;
 249
 250         if (o->norandommap && o->verify != VERIFY_NONE) {
 251                 log_err("fio: norandommap given, verify disabled\n");
 252                 o->verify = VERIFY_NONE;
 253         }
 254         if (o->bs_unaligned && (o->odirect || td->io_ops->flags & FIO_RAWIO))
 255                 log_err("fio: bs_unaligned may not work with raw io\n");
 256
 257         /*
 258          * thinktime_spin must be less than thinktime
 259          */
 260         if (o->thinktime_spin > o->thinktime)
 261                 o->thinktime_spin = o->thinktime;
 262
 263         /*
 264          * The low water mark cannot be bigger than the iodepth
 265          */
 266         if (o->iodepth_low > o->iodepth || !o->iodepth_low) {
 267                 /*
 268                  * syslet work around - if the workload is sequential,
 269                  * we want to let the queue drain all the way down to
 270                  * avoid seeking between async threads
 271                  */
 272                 if (!strcmp(td->io_ops->name, "syslet-rw") && !td_random(td))
 273                         o->iodepth_low = 1;
 274                 else
 275                         o->iodepth_low = o->iodepth;
 276         }
 277
 278         /*
 279          * If batch number isn't set, default to the same as iodepth
 280          */
 281         if (o->iodepth_batch > o->iodepth || !o->iodepth_batch)
 282                 o->iodepth_batch = o->iodepth;
 283
 284         if (o->nr_files > td->files_index)
 285                 o->nr_files = td->files_index;
 286
 287         if (o->open_files > o->nr_files || !o->open_files)
 288                 o->open_files = o->nr_files;
 289
 290         if ((o->rate && o->rate_iops) || (o->ratemin && o->rate_iops_min)) {
 291                 log_err("fio: rate and rate_iops are mutually exclusive\n");
 292                 return 1;
 293         }
 294         if ((o->rate < o->ratemin) || (o->rate_iops < o->rate_iops_min)) {
 295                 log_err("fio: minimum rate exceeds rate\n");
 296                 return 1;
 297         }
 298
 299         if (!o->timeout && o->time_based) {
 300                 log_err("fio: time_based requires a runtime/timeout setting\n");
 301                 o->time_based = 0;
 302         }
 303
 304         if (o->fill_device && !o->size)
 305                 o->size = ULONG_LONG_MAX;
 306
 307         if (td_rw(td) && td->o.verify != VERIFY_NONE)
 308                 log_info("fio: mixed read/write workload with verify. May not "
 309                  "work as expected, unless you pre-populated the file\n");
 310
 311         return 0;
 312 }
 313
 314 /*
 315  * This function leaks the buffer
 316  */
 317 static char *to_kmg(unsigned int val)
 318 {
 319         char *buf = malloc(32);
 320         char post[] = { 0, 'K', 'M', 'G', 'P', 'E', 0 };
 321         char *p = post;
 322
 323         do {
 324                 if (val & 1023)
 325                         break;
 326
 327                 val >>= 10;
 328                 p++;
 329         } while (*p);
 330
 331         snprintf(buf, 31, "%u%c", val, *p);
 332         return buf;
 333 }
 334
 335 /* External engines are specified by "external:name.o") */
 336 static const char *get_engine_name(const char *str)
 337 {
 338         char *p = strstr(str, ":");
 339
 340         if (!p)
 341                 return str;
 342
 343         p++;
 344         strip_blank_front(&p);
 345         strip_blank_end(p);
 346         return p;
 347 }
 348
 349 static int exists_and_not_file(const char *filename)
 350 {
 351         struct stat sb;
 352
 353         if (lstat(filename, &sb) == -1)
 354                 return 0;
 355
 356         if (S_ISREG(sb.st_mode))
 357                 return 0;
 358
 359         return 1;
 360 }
 361
 362 /*
 363  * Initialize the various random states we need (random io, block size ranges,
 364  * read/write mix, etc).
 365  */
 366 static int init_random_state(struct thread_data *td)
 367 {
 368         unsigned long seeds[6];
 369         int fd;
 370
 371         fd = open("/dev/urandom", O_RDONLY);
 372         if (fd == -1) {
 373                 td_verror(td, errno, "open");
 374                 return 1;
 375         }
 376
 377         if (read(fd, seeds, sizeof(seeds)) < (int) sizeof(seeds)) {
 378                 td_verror(td, EIO, "read");
 379                 close(fd);
 380                 return 1;
 381         }
 382
 383         close(fd);
 384
 385         os_random_seed(seeds[0], &td->bsrange_state);
 386         os_random_seed(seeds[1], &td->verify_state);
 387         os_random_seed(seeds[2], &td->rwmix_state);
 388
 389         if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
 390                 os_random_seed(seeds[3], &td->next_file_state);
 391
 392         os_random_seed(seeds[5], &td->file_size_state);
 393
 394         if (!td_random(td))
 395                 return 0;
 396
 397         if (td->o.rand_repeatable)
 398                 seeds[4] = FIO_RANDSEED * td->thread_number;
 399
 400         os_random_seed(seeds[4], &td->random_state);
 401         return 0;
 402 }
 403
 404 /*
 405  * Adds a job to the list of things todo. Sanitizes the various options
 406  * to make sure we don't have conflicts, and initializes various
 407  * members of td.
 408  */
 409 static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
 410 {
 411         const char *ddir_str[] = { NULL, "read", "write", "rw", NULL,
 412                                    "randread", "randwrite", "randrw" };
 413         unsigned int i;
 414         const char *engine;
 415         char fname[PATH_MAX];
 416         int numjobs, file_alloced;
 417
 418         /*
 419          * the def_thread is just for options, it's not a real job
 420          */
 421         if (td == &def_thread)
 422                 return 0;
 423
 424         /*
 425          * if we are just dumping the output command line, don't add the job
 426          */
 427         if (dump_cmdline) {
 428                 put_job(td);
 429                 return 0;
 430         }
 431
 432         engine = get_engine_name(td->o.ioengine);
 433         td->io_ops = load_ioengine(td, engine);
 434         if (!td->io_ops) {
 435                 log_err("fio: failed to load engine %s\n", engine);
 436                 goto err;
 437         }
 438
 439         if (td->o.use_thread)
 440                 nr_thread++;
 441         else
 442                 nr_process++;
 443
 444         if (td->o.odirect)
 445                 td->io_ops->flags |= FIO_RAWIO;
 446
 447         file_alloced = 0;
 448         if (!td->o.filename && !td->files_index) {
 449                 file_alloced = 1;
 450
 451                 if (td->o.nr_files == 1 && exists_and_not_file(jobname))
 452                         add_file(td, jobname);
 453                 else {
 454                         for (i = 0; i < td->o.nr_files; i++) {
 455                                 sprintf(fname, "%s.%d.%d", jobname, td->thread_number, i);
 456                                 add_file(td, fname);
 457                         }
 458                 }
 459         }
 460
 461         if (fixup_options(td))
 462                 goto err;
 463
 464         if (td->io_ops->flags & FIO_DISKLESSIO) {
 465                 struct fio_file *f;
 466
 467                 for_each_file(td, f, i)
 468                         f->real_file_size = -1ULL;
 469         }
 470
 471         td->mutex = fio_mutex_init(0);
 472
 473         td->ts.clat_stat[0].min_val = td->ts.clat_stat[1].min_val = ULONG_MAX;
 474         td->ts.slat_stat[0].min_val = td->ts.slat_stat[1].min_val = ULONG_MAX;
 475         td->ts.bw_stat[0].min_val = td->ts.bw_stat[1].min_val = ULONG_MAX;
 476         td->ddir_nr = td->o.ddir_nr;
 477
 478         if ((td->o.stonewall || td->o.numjobs > 1 || td->o.new_group)
 479              && prev_group_jobs) {
 480                 prev_group_jobs = 0;
 481                 groupid++;
 482         }
 483
 484         td->groupid = groupid;
 485         prev_group_jobs++;
 486
 487         if (init_random_state(td))
 488                 goto err;
 489
 490         if (setup_rate(td))
 491                 goto err;
 492
 493         if (td->o.write_lat_log) {
 494                 setup_log(&td->ts.slat_log);
 495                 setup_log(&td->ts.clat_log);
 496         }
 497         if (td->o.write_bw_log)
 498                 setup_log(&td->ts.bw_log);
 499
 500         if (!td->o.name)
 501                 td->o.name = strdup(jobname);
 502
 503         if (!terse_output) {
 504                 if (!job_add_num) {
 505                         if (!strcmp(td->io_ops->name, "cpuio"))
 506                                 log_info("%s: ioengine=cpu, cpuload=%u, cpucycle=%u\n", td->o.name, td->o.cpuload, td->o.cpucycle);
 507                         else {
 508                                 char *c1, *c2, *c3, *c4;
 509
 510                                 c1 = to_kmg(td->o.min_bs[DDIR_READ]);
 511                                 c2 = to_kmg(td->o.max_bs[DDIR_READ]);
 512                                 c3 = to_kmg(td->o.min_bs[DDIR_WRITE]);
 513                                 c4 = to_kmg(td->o.max_bs[DDIR_WRITE]);
 514
 515                                 log_info("%s: (g=%d): rw=%s, bs=%s-%s/%s-%s, ioengine=%s, iodepth=%u\n", td->o.name, td->groupid, ddir_str[td->o.td_ddir], c1, c2, c3, c4, td->io_ops->name, td->o.iodepth);
 516
 517                                 free(c1);
 518                                 free(c2);
 519                                 free(c3);
 520                                 free(c4);
 521                         }
 522                 } else if (job_add_num == 1)
 523                         log_info("...\n");
 524         }
 525
 526         /*
 527          * recurse add identical jobs, clear numjobs and stonewall options
 528          * as they don't apply to sub-jobs
 529          */
 530         numjobs = td->o.numjobs;
 531         while (--numjobs) {
 532                 struct thread_data *td_new = get_new_job(0, td);
 533
 534                 if (!td_new)
 535                         goto err;
 536
 537                 td_new->o.numjobs = 1;
 538                 td_new->o.stonewall = 0;
 539                 td_new->o.new_group = 0;
 540
 541                 if (file_alloced) {
 542                         td_new->o.filename = NULL;
 543                         td_new->files_index = 0;
 544                         td_new->files = NULL;
 545                 }
 546
 547                 job_add_num = numjobs - 1;
 548
 549                 if (add_job(td_new, jobname, job_add_num))
 550                         goto err;
 551         }
 552
 553         return 0;
 554 err:
 555         put_job(td);
 556         return -1;
 557 }
 558
 559 static int skip_this_section(const char *name)
 560 {
 561         if (!job_section)
 562                 return 0;
 563         if (!strncmp(name, "global", 6))
 564                 return 0;
 565
 566         return strncmp(job_section, name, strlen(job_section));
 567 }
 568
 569 static int is_empty_or_comment(char *line)
 570 {
 571         unsigned int i;
 572
 573         for (i = 0; i < strlen(line); i++) {
 574                 if (line[i] == ';')
 575                         return 1;
 576                 if (line[i] == '#')
 577                         return 1;
 578                 if (!isspace(line[i]) && !iscntrl(line[i]))
 579                         return 0;
 580         }
 581
 582         return 1;
 583 }
 584
 585 /*
 586  * This is our [ini] type file parser.
 587  */
 588 static int parse_jobs_ini(char *file, int stonewall_flag)
 589 {
 590         unsigned int global;
 591         struct thread_data *td;
 592         char *string, *name;
 593         FILE *f;
 594         char *p;
 595         int ret = 0, stonewall;
 596         int first_sect = 1;
 597         int skip_fgets = 0;
 598         int inside_skip = 0;
 599
 600         if (!strcmp(file, "-"))
 601                 f = stdin;
 602         else
 603                 f = fopen(file, "r");
 604
 605         if (!f) {
 606                 perror("fopen job file");
 607                 return 1;
 608         }
 609
 610         string = malloc(4096);
 611
 612         /*
 613          * it's really 256 + small bit, 280 should suffice
 614          */
 615         name = malloc(280);
 616         memset(name, 0, 280);
 617
 618         stonewall = stonewall_flag;
 619         do {
 620                 /*
 621                  * if skip_fgets is set, we already have loaded a line we
 622                  * haven't handled.
 623                  */
 624                 if (!skip_fgets) {
 625                         p = fgets(string, 4095, f);
 626                         if (!p)
 627                                 break;
 628                 }
 629
 630                 skip_fgets = 0;
 631                 strip_blank_front(&p);
 632                 strip_blank_end(p);
 633
 634                 if (is_empty_or_comment(p))
 635                         continue;
 636                 if (sscanf(p, "[%255s]", name) != 1) {
 637                         if (inside_skip)
 638                                 continue;
 639                         log_err("fio: option <%s> outside of [] job section\n", p);
 640                         break;
 641                 }
 642
 643                 if (skip_this_section(name)) {
 644                         inside_skip = 1;
 645                         continue;
 646                 } else
 647                         inside_skip = 0;
 648
 649                 global = !strncmp(name, "global", 6);
 650
 651                 name[strlen(name) - 1] = '\0';
 652
 653                 if (dump_cmdline) {
 654                         if (first_sect)
 655                                 log_info("fio ");
 656                         if (!global)
 657                                 log_info("--name=%s ", name);
 658                         first_sect = 0;
 659                 }
 660
 661                 td = get_new_job(global, &def_thread);
 662                 if (!td) {
 663                         ret = 1;
 664                         break;
 665                 }
 666
 667                 /*
 668                  * Seperate multiple job files by a stonewall
 669                  */
 670                 if (!global && stonewall) {
 671                         td->o.stonewall = stonewall;
 672                         stonewall = 0;
 673                 }
 674
 675                 while ((p = fgets(string, 4096, f)) != NULL) {
 676                         if (is_empty_or_comment(p))
 677                                 continue;
 678
 679                         strip_blank_front(&p);
 680
 681                         /*
 682                          * new section, break out and make sure we don't
 683                          * fgets() a new line at the top.
 684                          */
 685                         if (p[0] == '[') {
 686                                 skip_fgets = 1;
 687                                 break;
 688                         }
 689
 690                         strip_blank_end(p);
 691
 692                         /*
 693                          * Don't break here, continue parsing options so we
 694                          * dump all the bad ones. Makes trial/error fixups
 695                          * easier on the user.
 696                          */
 697                         ret |= fio_option_parse(td, p);
 698                         if (!ret && dump_cmdline)
 699                                 log_info("--%s ", p);
 700                 }
 701
 702                 if (!ret)
 703                         ret = add_job(td, name, 0);
 704                 else {
 705                         log_err("fio: job %s dropped\n", name);
 706                         put_job(td);
 707                 }
 708         } while (!ret);
 709
 710         if (dump_cmdline)
 711                 log_info("\n");
 712
 713         free(string);
 714         free(name);
 715         if (f != stdin)
 716                 fclose(f);
 717         return ret;
 718 }
 719
 720 static int fill_def_thread(void)
 721 {
 722         memset(&def_thread, 0, sizeof(def_thread));
 723
 724         fio_getaffinity(getpid(), &def_thread.o.cpumask);
 725
 726         /*
 727          * fill default options
 728          */
 729         fio_fill_default_options(&def_thread);
 730
 731         def_thread.o.timeout = def_timeout;
 732         def_thread.o.write_bw_log = write_bw_log;
 733         def_thread.o.write_lat_log = write_lat_log;
 734
 735         return 0;
 736 }
 737
 738 static void free_shm(void)
 739 {
 740         struct shmid_ds sbuf;
 741
 742         if (threads) {
 743                 shmdt((void *) threads);
 744                 threads = NULL;
 745                 shmctl(shm_id, IPC_RMID, &sbuf);
 746         }
 747
 748         scleanup();
 749 }
 750
 751 /*
 752  * The thread area is shared between the main process and the job
 753  * threads/processes. So setup a shared memory segment that will hold
 754  * all the job info. We use the end of the region for keeping track of
 755  * open files across jobs, for file sharing.
 756  */
 757 static int setup_thread_area(void)
 758 {
 759         void *hash;
 760
 761         /*
 762          * 1024 is too much on some machines, scale max_jobs if
 763          * we get a failure that looks like too large a shm segment
 764          */
 765         do {
 766                 size_t size = max_jobs * sizeof(struct thread_data);
 767
 768                 size += file_hash_size;
 769
 770                 shm_id = shmget(0, size, IPC_CREAT | 0600);
 771                 if (shm_id != -1)
 772                         break;
 773                 if (errno != EINVAL) {
 774                         perror("shmget");
 775                         break;
 776                 }
 777
 778                 max_jobs >>= 1;
 779         } while (max_jobs);
 780
 781         if (shm_id == -1)
 782                 return 1;
 783
 784         threads = shmat(shm_id, NULL, 0);
 785         if (threads == (void *) -1) {
 786                 perror("shmat");
 787                 return 1;
 788         }
 789
 790         memset(threads, 0, max_jobs * sizeof(struct thread_data));
 791         hash = (void *) threads + max_jobs * sizeof(struct thread_data);
 792         file_hash_init(hash);
 793         atexit(free_shm);
 794         return 0;
 795 }
 796
 797 static void usage(const char *name)
 798 {
 799         printf("%s\n", fio_version_string);
 800         printf("%s [options] [job options] <job file(s)>\n", name);
 801         printf("\t--debug=options\tEnable debug logging\n");
 802         printf("\t--output\tWrite output to file\n");
 803         printf("\t--timeout\tRuntime in seconds\n");
 804         printf("\t--latency-log\tGenerate per-job latency logs\n");
 805         printf("\t--bandwidth-log\tGenerate per-job bandwidth logs\n");
 806         printf("\t--minimal\tMinimal (terse) output\n");
 807         printf("\t--version\tPrint version info and exit\n");
 808         printf("\t--help\t\tPrint this page\n");
 809         printf("\t--cmdhelp=cmd\tPrint command help, \"all\" for all of them\n");
 810         printf("\t--showcmd\tTurn a job file into command line options\n");
 811         printf("\t--eta=when\tWhen ETA estimate should be printed\n");
 812         printf("\t          \tMay be \"always\", \"never\" or \"auto\"\n");
 813         printf("\t--readonly\tTurn on safety read-only checks, preventing writes\n");
 814         printf("\t--section=name\tOnly run specified section in job file\n");
 815 }
 816
 817 #ifdef FIO_INC_DEBUG
 818 struct debug_level debug_levels[] = {
 819         { .name = "process",    .shift = FD_PROCESS, },
 820         { .name = "file",       .shift = FD_FILE, },
 821         { .name = "io",         .shift = FD_IO, },
 822         { .name = "mem",        .shift = FD_MEM, },
 823         { .name = "blktrace",   .shift = FD_BLKTRACE },
 824         { .name = "verify",     .shift = FD_VERIFY },
 825         { .name = "random",     .shift = FD_RANDOM },
 826         { .name = "parse",      .shift = FD_PARSE },
 827         { },
 828 };
 829
 830 static int set_debug(const char *string)
 831 {
 832         struct debug_level *dl;
 833         char *p = (char *) string;
 834         char *opt;
 835         int i;
 836
 837         if (!strcmp(string, "?") || !strcmp(string, "help")) {
 838                 int i;
 839
 840                 log_info("fio: dumping debug options:");
 841                 for (i = 0; debug_levels[i].name; i++) {
 842                         dl = &debug_levels[i];
 843                         log_info("%s,", dl->name);
 844                 }
 845                 log_info("all\n");
 846                 return 1;
 847         } else if (!strcmp(string, "all")) {
 848                 fio_debug = ~0UL;
 849                 return 0;
 850         }
 851
 852         while ((opt = strsep(&p, ",")) != NULL) {
 853                 int found = 0;
 854
 855                 for (i = 0; debug_levels[i].name; i++) {
 856                         dl = &debug_levels[i];
 857                         if (!strncmp(opt, dl->name, strlen(opt))) {
 858                                 log_info("fio: set debug option %s\n", opt);
 859                                 found = 1;
 860                                 fio_debug |= (1UL << dl->shift);
 861                                 break;
 862                         }
 863                 }
 864
 865                 if (!found)
 866                         log_err("fio: debug mask %s not found\n", opt);
 867         }
 868         return 0;
 869 }
 870 #else
 871 static void set_debug(const char *string)
 872 {
 873         log_err("fio: debug tracing not included in build\n");
 874         return 1;
 875 }
 876 #endif
 877
 878 static int parse_cmd_line(int argc, char *argv[])
 879 {
 880         struct thread_data *td = NULL;
 881         int c, ini_idx = 0, lidx, ret = 0, do_exit = 0, exit_val = 0;
 882
 883         while ((c = getopt_long_only(argc, argv, "", long_options, &lidx)) != -1) {
 884                 switch (c) {
 885                 case 't':
 886                         def_timeout = atoi(optarg);
 887                         break;
 888                 case 'l':
 889                         write_lat_log = 1;
 890                         break;
 891                 case 'w':
 892                         write_bw_log = 1;
 893                         break;
 894                 case 'o':
 895                         f_out = fopen(optarg, "w+");
 896                         if (!f_out) {
 897                                 perror("fopen output");
 898                                 exit(1);
 899                         }
 900                         f_err = f_out;
 901                         break;
 902                 case 'm':
 903                         terse_output = 1;
 904                         break;
 905                 case 'h':
 906                         usage(argv[0]);
 907                         exit(0);
 908                 case 'c':
 909                         exit(fio_show_option_help(optarg));
 910                 case 's':
 911                         dump_cmdline = 1;
 912                         break;
 913                 case 'r':
 914                         read_only = 1;
 915                         break;
 916                 case 'v':
 917                         printf("%s\n", fio_version_string);
 918                         exit(0);
 919                 case 'e':
 920                         if (!strcmp("always", optarg))
 921                                 eta_print = FIO_ETA_ALWAYS;
 922                         else if (!strcmp("never", optarg))
 923                                 eta_print = FIO_ETA_NEVER;
 924                         break;
 925                 case 'd':
 926                         if (set_debug(optarg))
 927                                 do_exit++;
 928                         break;
 929                 case 'x':
 930                         if (!strcmp(optarg, "global")) {
 931                                 log_err("fio: can't use global as only section\n");
 932                                 do_exit++;
 933                                 exit_val = 1;
 934                                 break;
 935                         }
 936                         if (job_section)
 937                                 free(job_section);
 938                         job_section = strdup(optarg);
 939                         break;
 940                 case FIO_GETOPT_JOB: {
 941                         const char *opt = long_options[lidx].name;
 942                         char *val = optarg;
 943
 944                         if (!strncmp(opt, "name", 4) && td) {
 945                                 ret = add_job(td, td->o.name ?: "fio", 0);
 946                                 if (ret) {
 947                                         put_job(td);
 948                                         return 0;
 949                                 }
 950                                 td = NULL;
 951                         }
 952                         if (!td) {
 953                                 int is_section = !strncmp(opt, "name", 4);
 954                                 int global = 0;
 955
 956                                 if (!is_section || !strncmp(val, "global", 6))
 957                                         global = 1;
 958
 959                                 if (is_section && skip_this_section(val))
 960                                         continue;
 961
 962                                 td = get_new_job(global, &def_thread);
 963                                 if (!td)
 964                                         return 0;
 965                         }
 966
 967                         ret = fio_cmd_option_parse(td, opt, val);
 968                         break;
 969                 }
 970                 default:
 971                         do_exit++;
 972                         exit_val = 1;
 973                         break;
 974                 }
 975         }
 976
 977         if (do_exit)
 978                 exit(exit_val);
 979
 980         if (td) {
 981                 if (!ret)
 982                         ret = add_job(td, td->o.name ?: "fio", 0);
 983                 if (ret)
 984                         put_job(td);
 985         }
 986
 987         while (optind < argc) {
 988                 ini_idx++;
 989                 ini_file = realloc(ini_file, ini_idx * sizeof(char *));
 990                 ini_file[ini_idx - 1] = strdup(argv[optind]);
 991                 optind++;
 992         }
 993
 994         return ini_idx;
 995 }
 996
 997 int parse_options(int argc, char *argv[])
 998 {
 999         int job_files, i;
1000
1001         f_out = stdout;
1002         f_err = stderr;
1003
1004         fio_options_dup_and_init(long_options);
1005
1006         if (setup_thread_area())
1007                 return 1;
1008         if (fill_def_thread())
1009                 return 1;
1010
1011         job_files = parse_cmd_line(argc, argv);
1012
1013         for (i = 0; i < job_files; i++) {
1014                 if (fill_def_thread())
1015                         return 1;
1016                 if (parse_jobs_ini(ini_file[i], i))
1017                         return 1;
1018                 free(ini_file[i]);
1019         }
1020
1021         free(ini_file);
1022         options_mem_free(&def_thread);
1023
1024         if (!thread_number) {
1025                 if (dump_cmdline)
1026                         return 0;
1027
1028                 log_err("No jobs defined(s)\n");
1029                 usage(argv[0]);
1030                 return 1;
1031         }
1032
1033         return 0;
1034 }