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
  20 static char fio_version_string[] = "fio 1.19";
  21
  22 #define FIO_RANDSEED            (0xb1899bedUL)
  23
  24 static char **ini_file;
  25 static int max_jobs = MAX_JOBS;
  26 static int dump_cmdline;
  27
  28 struct thread_data def_thread;
  29 struct thread_data *threads = NULL;
  30
  31 int exitall_on_terminate = 0;
  32 int terse_output = 0;
  33 int eta_print;
  34 unsigned long long mlock_size = 0;
  35 FILE *f_out = NULL;
  36 FILE *f_err = NULL;
  37 char *job_section = NULL;
  38
  39 int write_bw_log = 0;
  40 int read_only = 0;
  41
  42 static int def_timeout = 0;
  43 static int write_lat_log = 0;
  44
  45 static int prev_group_jobs;
  46
  47 unsigned long fio_debug = 0;
  48
  49 /*
  50  * Command line options. These will contain the above, plus a few
  51  * extra that only pertain to fio itself and not jobs.
  52  */
  53 static struct option long_options[FIO_NR_OPTIONS] = {
  54         {
  55                 .name           = "output",
  56                 .has_arg        = required_argument,
  57                 .val            = 'o',
  58         },
  59         {
  60                 .name           = "timeout",
  61                 .has_arg        = required_argument,
  62                 .val            = 't',
  63         },
  64         {
  65                 .name           = "latency-log",
  66                 .has_arg        = required_argument,
  67                 .val            = 'l',
  68         },
  69         {
  70                 .name           = "bandwidth-log",
  71                 .has_arg        = required_argument,
  72                 .val            = 'b',
  73         },
  74         {
  75                 .name           = "minimal",
  76                 .has_arg        = optional_argument,
  77                 .val            = 'm',
  78         },
  79         {
  80                 .name           = "version",
  81                 .has_arg        = no_argument,
  82                 .val            = 'v',
  83         },
  84         {
  85                 .name           = "help",
  86                 .has_arg        = no_argument,
  87                 .val            = 'h',
  88         },
  89         {
  90                 .name           = "cmdhelp",
  91                 .has_arg        = optional_argument,
  92                 .val            = 'c',
  93         },
  94         {
  95                 .name           = "showcmd",
  96                 .has_arg        = no_argument,
  97                 .val            = 's',
  98         },
  99         {
 100                 .name           = "readonly",
 101                 .has_arg        = no_argument,
 102                 .val            = 'r',
 103         },
 104         {
 105                 .name           = "eta",
 106                 .has_arg        = required_argument,
 107                 .val            = 'e',
 108         },
 109         {
 110                 .name           = "debug",
 111                 .has_arg        = required_argument,
 112                 .val            = 'd',
 113         },
 114         {
 115                 .name           = "section",
 116                 .has_arg        = required_argument,
 117                 .val            = 'x',
 118         },
 119         {
 120                 .name           = NULL,
 121         },
 122 };
 123
 124 FILE *get_f_out()
 125 {
 126         return f_out;
 127 }
 128
 129 FILE *get_f_err()
 130 {
 131         return f_err;
 132 }
 133
 134 /*
 135  * Return a free job structure.
 136  */
 137 static struct thread_data *get_new_job(int global, struct thread_data *parent)
 138 {
 139         struct thread_data *td;
 140
 141         if (global)
 142                 return &def_thread;
 143         if (thread_number >= max_jobs)
 144                 return NULL;
 145
 146         td = &threads[thread_number++];
 147         *td = *parent;
 148
 149         dup_files(td, parent);
 150         options_mem_dupe(td);
 151
 152         td->thread_number = thread_number;
 153         return td;
 154 }
 155
 156 static void put_job(struct thread_data *td)
 157 {
 158         if (td == &def_thread)
 159                 return;
 160
 161         if (td->error)
 162                 log_info("fio: %s\n", td->verror);
 163
 164         memset(&threads[td->thread_number - 1], 0, sizeof(*td));
 165         thread_number--;
 166 }
 167
 168 static int setup_rate(struct thread_data *td)
 169 {
 170         unsigned long nr_reads_per_msec;
 171         unsigned long long rate;
 172         unsigned int bs;
 173
 174         if (!td->o.rate && !td->o.rate_iops)
 175                 return 0;
 176
 177         if (td_rw(td))
 178                 bs = td->o.rw_min_bs;
 179         else if (td_read(td))
 180                 bs = td->o.min_bs[DDIR_READ];
 181         else
 182                 bs = td->o.min_bs[DDIR_WRITE];
 183
 184         if (td->o.rate) {
 185                 rate = td->o.rate;
 186                 nr_reads_per_msec = (rate * 1024 * 1000LL) / bs;
 187         } else
 188                 nr_reads_per_msec = td->o.rate_iops * 1000UL;
 189
 190         if (!nr_reads_per_msec) {
 191                 log_err("rate lower than supported\n");
 192                 return -1;
 193         }
 194
 195         td->rate_usec_cycle = 1000000000ULL / nr_reads_per_msec;
 196         td->rate_pending_usleep = 0;
 197         return 0;
 198 }
 199
 200 /*
 201  * Lazy way of fixing up options that depend on each other. We could also
 202  * define option callback handlers, but this is easier.
 203  */
 204 static int fixup_options(struct thread_data *td)
 205 {
 206         struct thread_options *o = &td->o;
 207
 208         if (read_only && td_write(td)) {
 209                 log_err("fio: job <%s> has write bit set, but fio is in read-only mode\n", td->o.name);
 210                 return 1;
 211         }
 212
 213         if (o->rwmix[DDIR_READ] + o->rwmix[DDIR_WRITE] > 100)
 214                 o->rwmix[DDIR_WRITE] = 100 - o->rwmix[DDIR_READ];
 215
 216         if (o->write_iolog_file && o->read_iolog_file) {
 217                 log_err("fio: read iolog overrides write_iolog\n");
 218                 free(o->write_iolog_file);
 219                 o->write_iolog_file = NULL;
 220         }
 221
 222         /*
 223          * only really works for sequential io for now, and with 1 file
 224          */
 225         if (o->zone_size && td_random(td) && o->open_files == 1)
 226                 o->zone_size = 0;
 227
 228         /*
 229          * Reads can do overwrites, we always need to pre-create the file
 230          */
 231         if (td_read(td) || td_rw(td))
 232                 o->overwrite = 1;
 233
 234         if (!o->min_bs[DDIR_READ])
 235                 o->min_bs[DDIR_READ]= o->bs[DDIR_READ];
 236         if (!o->max_bs[DDIR_READ])
 237                 o->max_bs[DDIR_READ] = o->bs[DDIR_READ];
 238         if (!o->min_bs[DDIR_WRITE])
 239                 o->min_bs[DDIR_WRITE]= o->bs[DDIR_WRITE];
 240         if (!o->max_bs[DDIR_WRITE])
 241                 o->max_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 242
 243         o->rw_min_bs = min(o->min_bs[DDIR_READ], o->min_bs[DDIR_WRITE]);
 244
 245         if (!o->file_size_high)
 246                 o->file_size_high = o->file_size_low;
 247
 248         if (o->norandommap && o->verify != VERIFY_NONE) {
 249                 log_err("fio: norandommap given, verify disabled\n");
 250                 o->verify = VERIFY_NONE;
 251         }
 252         if (o->bs_unaligned && (o->odirect || td->io_ops->flags & FIO_RAWIO))
 253                 log_err("fio: bs_unaligned may not work with raw io\n");
 254
 255         /*
 256          * thinktime_spin must be less than thinktime
 257          */
 258         if (o->thinktime_spin > o->thinktime)
 259                 o->thinktime_spin = o->thinktime;
 260
 261         /*
 262          * The low water mark cannot be bigger than the iodepth
 263          */
 264         if (o->iodepth_low > o->iodepth || !o->iodepth_low) {
 265                 /*
 266                  * syslet work around - if the workload is sequential,
 267                  * we want to let the queue drain all the way down to
 268                  * avoid seeking between async threads
 269                  */
 270                 if (!strcmp(td->io_ops->name, "syslet-rw") && !td_random(td))
 271                         o->iodepth_low = 1;
 272                 else
 273                         o->iodepth_low = o->iodepth;
 274         }
 275
 276         /*
 277          * If batch number isn't set, default to the same as iodepth
 278          */
 279         if (o->iodepth_batch > o->iodepth || !o->iodepth_batch)
 280                 o->iodepth_batch = o->iodepth;
 281
 282         if (o->nr_files > td->files_index)
 283                 o->nr_files = td->files_index;
 284
 285         if (o->open_files > o->nr_files || !o->open_files)
 286                 o->open_files = o->nr_files;
 287
 288         if ((o->rate && o->rate_iops) || (o->ratemin && o->rate_iops_min)) {
 289                 log_err("fio: rate and rate_iops are mutually exclusive\n");
 290                 return 1;
 291         }
 292         if ((o->rate < o->ratemin) || (o->rate_iops < o->rate_iops_min)) {
 293                 log_err("fio: minimum rate exceeds rate\n");
 294                 return 1;
 295         }
 296
 297         if (!o->timeout && o->time_based) {
 298                 log_err("fio: time_based requires a runtime/timeout setting\n");
 299                 o->time_based = 0;
 300         }
 301
 302         if (o->fill_device && !o->size)
 303                 o->size = ULONG_LONG_MAX;
 304
 305         if (td_rw(td) && td->o.verify != VERIFY_NONE)
 306                 log_info("fio: mixed read/write workload with verify. May not "
 307                  "work as expected, unless you pre-populated the file\n");
 308
 309         return 0;
 310 }
 311
 312 /*
 313  * This function leaks the buffer
 314  */
 315 static char *to_kmg(unsigned int val)
 316 {
 317         char *buf = malloc(32);
 318         char post[] = { 0, 'K', 'M', 'G', 'P', 'E', 0 };
 319         char *p = post;
 320
 321         do {
 322                 if (val & 1023)
 323                         break;
 324
 325                 val >>= 10;
 326                 p++;
 327         } while (*p);
 328
 329         snprintf(buf, 31, "%u%c", val, *p);
 330         return buf;
 331 }
 332
 333 /* External engines are specified by "external:name.o") */
 334 static const char *get_engine_name(const char *str)
 335 {
 336         char *p = strstr(str, ":");
 337
 338         if (!p)
 339                 return str;
 340
 341         p++;
 342         strip_blank_front(&p);
 343         strip_blank_end(p);
 344         return p;
 345 }
 346
 347 static int exists_and_not_file(const char *filename)
 348 {
 349         struct stat sb;
 350
 351         if (lstat(filename, &sb) == -1)
 352                 return 0;
 353
 354         if (S_ISREG(sb.st_mode))
 355                 return 0;
 356
 357         return 1;
 358 }
 359
 360 /*
 361  * Initialize the various random states we need (random io, block size ranges,
 362  * read/write mix, etc).
 363  */
 364 static int init_random_state(struct thread_data *td)
 365 {
 366         unsigned long seeds[6];
 367         int fd;
 368
 369         fd = open("/dev/urandom", O_RDONLY);
 370         if (fd == -1) {
 371                 td_verror(td, errno, "open");
 372                 return 1;
 373         }
 374
 375         if (read(fd, seeds, sizeof(seeds)) < (int) sizeof(seeds)) {
 376                 td_verror(td, EIO, "read");
 377                 close(fd);
 378                 return 1;
 379         }
 380
 381         close(fd);
 382
 383         os_random_seed(seeds[0], &td->bsrange_state);
 384         os_random_seed(seeds[1], &td->verify_state);
 385         os_random_seed(seeds[2], &td->rwmix_state);
 386
 387         if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
 388                 os_random_seed(seeds[3], &td->next_file_state);
 389
 390         os_random_seed(seeds[5], &td->file_size_state);
 391
 392         if (!td_random(td))
 393                 return 0;
 394
 395         if (td->o.rand_repeatable)
 396                 seeds[4] = FIO_RANDSEED * td->thread_number;
 397
 398         os_random_seed(seeds[4], &td->random_state);
 399         return 0;
 400 }
 401
 402 /*
 403  * Adds a job to the list of things todo. Sanitizes the various options
 404  * to make sure we don't have conflicts, and initializes various
 405  * members of td.
 406  */
 407 static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
 408 {
 409         const char *ddir_str[] = { NULL, "read", "write", "rw", NULL,
 410                                    "randread", "randwrite", "randrw" };
 411         unsigned int i;
 412         const char *engine;
 413         char fname[PATH_MAX];
 414         int numjobs, file_alloced;
 415
 416         /*
 417          * the def_thread is just for options, it's not a real job
 418          */
 419         if (td == &def_thread)
 420                 return 0;
 421
 422         /*
 423          * if we are just dumping the output command line, don't add the job
 424          */
 425         if (dump_cmdline) {
 426                 put_job(td);
 427                 return 0;
 428         }
 429
 430         engine = get_engine_name(td->o.ioengine);
 431         td->io_ops = load_ioengine(td, engine);
 432         if (!td->io_ops) {
 433                 log_err("fio: failed to load engine %s\n", engine);
 434                 goto err;
 435         }
 436
 437         if (td->o.use_thread)
 438                 nr_thread++;
 439         else
 440                 nr_process++;
 441
 442         if (td->o.odirect)
 443                 td->io_ops->flags |= FIO_RAWIO;
 444
 445         file_alloced = 0;
 446         if (!td->o.filename && !td->files_index) {
 447                 file_alloced = 1;
 448
 449                 if (td->o.nr_files == 1 && exists_and_not_file(jobname))
 450                         add_file(td, jobname);
 451                 else {
 452                         for (i = 0; i < td->o.nr_files; i++) {
 453                                 sprintf(fname, "%s.%d.%d", jobname, td->thread_number, i);
 454                                 add_file(td, fname);
 455                         }
 456                 }
 457         }
 458
 459         if (fixup_options(td))
 460                 goto err;
 461
 462         if (td->io_ops->flags & FIO_DISKLESSIO) {
 463                 struct fio_file *f;
 464
 465                 for_each_file(td, f, i)
 466                         f->real_file_size = -1ULL;
 467         }
 468
 469         td->mutex = fio_sem_init(0);
 470
 471         td->ts.clat_stat[0].min_val = td->ts.clat_stat[1].min_val = ULONG_MAX;
 472         td->ts.slat_stat[0].min_val = td->ts.slat_stat[1].min_val = ULONG_MAX;
 473         td->ts.bw_stat[0].min_val = td->ts.bw_stat[1].min_val = ULONG_MAX;
 474         td->ddir_nr = td->o.ddir_nr;
 475
 476         if ((td->o.stonewall || td->o.numjobs > 1 || td->o.new_group)
 477              && prev_group_jobs) {
 478                 prev_group_jobs = 0;
 479                 groupid++;
 480         }
 481
 482         td->groupid = groupid;
 483         prev_group_jobs++;
 484
 485         if (init_random_state(td))
 486                 goto err;
 487
 488         if (setup_rate(td))
 489                 goto err;
 490
 491         if (td->o.write_lat_log) {
 492                 setup_log(&td->ts.slat_log);
 493                 setup_log(&td->ts.clat_log);
 494         }
 495         if (td->o.write_bw_log)
 496                 setup_log(&td->ts.bw_log);
 497
 498         if (!td->o.name)
 499                 td->o.name = strdup(jobname);
 500
 501         if (!terse_output) {
 502                 if (!job_add_num) {
 503                         if (!strcmp(td->io_ops->name, "cpuio"))
 504                                 log_info("%s: ioengine=cpu, cpuload=%u, cpucycle=%u\n", td->o.name, td->o.cpuload, td->o.cpucycle);
 505                         else {
 506                                 char *c1, *c2, *c3, *c4;
 507
 508                                 c1 = to_kmg(td->o.min_bs[DDIR_READ]);
 509                                 c2 = to_kmg(td->o.max_bs[DDIR_READ]);
 510                                 c3 = to_kmg(td->o.min_bs[DDIR_WRITE]);
 511                                 c4 = to_kmg(td->o.max_bs[DDIR_WRITE]);
 512
 513                                 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);
 514
 515                                 free(c1);
 516                                 free(c2);
 517                                 free(c3);
 518                                 free(c4);
 519                         }
 520                 } else if (job_add_num == 1)
 521                         log_info("...\n");
 522         }
 523
 524         /*
 525          * recurse add identical jobs, clear numjobs and stonewall options
 526          * as they don't apply to sub-jobs
 527          */
 528         numjobs = td->o.numjobs;
 529         while (--numjobs) {
 530                 struct thread_data *td_new = get_new_job(0, td);
 531
 532                 if (!td_new)
 533                         goto err;
 534
 535                 td_new->o.numjobs = 1;
 536                 td_new->o.stonewall = 0;
 537                 td_new->o.new_group = 0;
 538
 539                 if (file_alloced) {
 540                         td_new->o.filename = NULL;
 541                         td_new->files_index = 0;
 542                         td_new->files = NULL;
 543                 }
 544
 545                 job_add_num = numjobs - 1;
 546
 547                 if (add_job(td_new, jobname, job_add_num))
 548                         goto err;
 549         }
 550
 551         return 0;
 552 err:
 553         put_job(td);
 554         return -1;
 555 }
 556
 557 static int skip_this_section(const char *name)
 558 {
 559         if (!job_section)
 560                 return 0;
 561         if (!strncmp(name, "global", 6))
 562                 return 0;
 563
 564         return strncmp(job_section, name, strlen(job_section));
 565 }
 566
 567 static int is_empty_or_comment(char *line)
 568 {
 569         unsigned int i;
 570
 571         for (i = 0; i < strlen(line); i++) {
 572                 if (line[i] == ';')
 573                         return 1;
 574                 if (line[i] == '#')
 575                         return 1;
 576                 if (!isspace(line[i]) && !iscntrl(line[i]))
 577                         return 0;
 578         }
 579
 580         return 1;
 581 }
 582
 583 /*
 584  * This is our [ini] type file parser.
 585  */
 586 static int parse_jobs_ini(char *file, int stonewall_flag)
 587 {
 588         unsigned int global;
 589         struct thread_data *td;
 590         char *string, *name;
 591         FILE *f;
 592         char *p;
 593         int ret = 0, stonewall;
 594         int first_sect = 1;
 595         int skip_fgets = 0;
 596         int inside_skip = 0;
 597
 598         if (!strcmp(file, "-"))
 599                 f = stdin;
 600         else
 601                 f = fopen(file, "r");
 602
 603         if (!f) {
 604                 perror("fopen job file");
 605                 return 1;
 606         }
 607
 608         string = malloc(4096);
 609
 610         /*
 611          * it's really 256 + small bit, 280 should suffice
 612          */
 613         name = malloc(280);
 614         memset(name, 0, 280);
 615
 616         stonewall = stonewall_flag;
 617         do {
 618                 /*
 619                  * if skip_fgets is set, we already have loaded a line we
 620                  * haven't handled.
 621                  */
 622                 if (!skip_fgets) {
 623                         p = fgets(string, 4095, f);
 624                         if (!p)
 625                                 break;
 626                 }
 627
 628                 skip_fgets = 0;
 629                 strip_blank_front(&p);
 630                 strip_blank_end(p);
 631
 632                 if (is_empty_or_comment(p))
 633                         continue;
 634                 if (sscanf(p, "[%255s]", name) != 1) {
 635                         if (inside_skip)
 636                                 continue;
 637                         log_err("fio: option <%s> outside of [] job section\n", p);
 638                         break;
 639                 }
 640
 641                 if (skip_this_section(name)) {
 642                         inside_skip = 1;
 643                         continue;
 644                 } else
 645                         inside_skip = 0;
 646
 647                 global = !strncmp(name, "global", 6);
 648
 649                 name[strlen(name) - 1] = '\0';
 650
 651                 if (dump_cmdline) {
 652                         if (first_sect)
 653                                 log_info("fio ");
 654                         if (!global)
 655                                 log_info("--name=%s ", name);
 656                         first_sect = 0;
 657                 }
 658
 659                 td = get_new_job(global, &def_thread);
 660                 if (!td) {
 661                         ret = 1;
 662                         break;
 663                 }
 664
 665                 /*
 666                  * Seperate multiple job files by a stonewall
 667                  */
 668                 if (!global && stonewall) {
 669                         td->o.stonewall = stonewall;
 670                         stonewall = 0;
 671                 }
 672
 673                 while ((p = fgets(string, 4096, f)) != NULL) {
 674                         if (is_empty_or_comment(p))
 675                                 continue;
 676
 677                         strip_blank_front(&p);
 678
 679                         /*
 680                          * new section, break out and make sure we don't
 681                          * fgets() a new line at the top.
 682                          */
 683                         if (p[0] == '[') {
 684                                 skip_fgets = 1;
 685                                 break;
 686                         }
 687
 688                         strip_blank_end(p);
 689
 690                         /*
 691                          * Don't break here, continue parsing options so we
 692                          * dump all the bad ones. Makes trial/error fixups
 693                          * easier on the user.
 694                          */
 695                         ret |= fio_option_parse(td, p);
 696                         if (!ret && dump_cmdline)
 697                                 log_info("--%s ", p);
 698                 }
 699
 700                 if (!ret)
 701                         ret = add_job(td, name, 0);
 702                 else {
 703                         log_err("fio: job %s dropped\n", name);
 704                         put_job(td);
 705                 }
 706         } while (!ret);
 707
 708         if (dump_cmdline)
 709                 log_info("\n");
 710
 711         free(string);
 712         free(name);
 713         if (f != stdin)
 714                 fclose(f);
 715         return ret;
 716 }
 717
 718 static int fill_def_thread(void)
 719 {
 720         memset(&def_thread, 0, sizeof(def_thread));
 721
 722         fio_getaffinity(getpid(), &def_thread.o.cpumask);
 723
 724         /*
 725          * fill default options
 726          */
 727         fio_fill_default_options(&def_thread);
 728
 729         def_thread.o.timeout = def_timeout;
 730         def_thread.o.write_bw_log = write_bw_log;
 731         def_thread.o.write_lat_log = write_lat_log;
 732
 733         return 0;
 734 }
 735
 736 static void free_shm(void)
 737 {
 738         struct shmid_ds sbuf;
 739
 740         if (threads) {
 741                 shmdt((void *) threads);
 742                 threads = NULL;
 743                 shmctl(shm_id, IPC_RMID, &sbuf);
 744         }
 745 }
 746
 747 /*
 748  * The thread area is shared between the main process and the job
 749  * threads/processes. So setup a shared memory segment that will hold
 750  * all the job info.
 751  */
 752 static int setup_thread_area(void)
 753 {
 754         /*
 755          * 1024 is too much on some machines, scale max_jobs if
 756          * we get a failure that looks like too large a shm segment
 757          */
 758         do {
 759                 size_t size = max_jobs * sizeof(struct thread_data);
 760
 761                 shm_id = shmget(0, size, IPC_CREAT | 0600);
 762                 if (shm_id != -1)
 763                         break;
 764                 if (errno != EINVAL) {
 765                         perror("shmget");
 766                         break;
 767                 }
 768
 769                 max_jobs >>= 1;
 770         } while (max_jobs);
 771
 772         if (shm_id == -1)
 773                 return 1;
 774
 775         threads = shmat(shm_id, NULL, 0);
 776         if (threads == (void *) -1) {
 777                 perror("shmat");
 778                 return 1;
 779         }
 780
 781         memset(threads, 0, max_jobs * sizeof(struct thread_data));
 782         atexit(free_shm);
 783         return 0;
 784 }
 785
 786 static void usage(const char *name)
 787 {
 788         printf("%s\n", fio_version_string);
 789         printf("%s [options] [job options] <job file(s)>\n", name);
 790         printf("\t--debug=options\tEnable debug logging\n");
 791         printf("\t--output\tWrite output to file\n");
 792         printf("\t--timeout\tRuntime in seconds\n");
 793         printf("\t--latency-log\tGenerate per-job latency logs\n");
 794         printf("\t--bandwidth-log\tGenerate per-job bandwidth logs\n");
 795         printf("\t--minimal\tMinimal (terse) output\n");
 796         printf("\t--version\tPrint version info and exit\n");
 797         printf("\t--help\t\tPrint this page\n");
 798         printf("\t--cmdhelp=cmd\tPrint command help, \"all\" for all of them\n");
 799         printf("\t--showcmd\tTurn a job file into command line options\n");
 800         printf("\t--eta=when\tWhen ETA estimate should be printed\n");
 801         printf("\t          \tMay be \"always\", \"never\" or \"auto\"\n");
 802         printf("\t--readonly\tTurn on safety read-only checks, preventing writes\n");
 803         printf("\t--section=name\tOnly run specified section in job file\n");
 804 }
 805
 806 #ifdef FIO_INC_DEBUG
 807 struct debug_level debug_levels[] = {
 808         { .name = "process",    .shift = FD_PROCESS, },
 809         { .name = "file",       .shift = FD_FILE, },
 810         { .name = "io",         .shift = FD_IO, },
 811         { .name = "mem",        .shift = FD_MEM, },
 812         { .name = "blktrace",   .shift = FD_BLKTRACE },
 813         { .name = "verify",     .shift = FD_VERIFY },
 814         { .name = "random",     .shift = FD_RANDOM },
 815         { },
 816 };
 817
 818 static int set_debug(const char *string)
 819 {
 820         struct debug_level *dl;
 821         char *p = (char *) string;
 822         char *opt;
 823         int i;
 824
 825         if (!strcmp(string, "?") || !strcmp(string, "help")) {
 826                 int i;
 827
 828                 log_info("fio: dumping debug options:");
 829                 for (i = 0; debug_levels[i].name; i++) {
 830                         dl = &debug_levels[i];
 831                         log_info("%s,", dl->name);
 832                 }
 833                 log_info("all\n");
 834                 return 1;
 835         } else if (!strcmp(string, "all")) {
 836                 fio_debug = ~0UL;
 837                 return 0;
 838         }
 839
 840         while ((opt = strsep(&p, ",")) != NULL) {
 841                 int found = 0;
 842
 843                 for (i = 0; debug_levels[i].name; i++) {
 844                         dl = &debug_levels[i];
 845                         if (!strncmp(opt, dl->name, strlen(opt))) {
 846                                 log_info("fio: set debug option %s\n", opt);
 847                                 found = 1;
 848                                 fio_debug |= (1UL << dl->shift);
 849                                 break;
 850                         }
 851                 }
 852
 853                 if (!found)
 854                         log_err("fio: debug mask %s not found\n", opt);
 855         }
 856         return 0;
 857 }
 858 #else
 859 static void set_debug(const char *string)
 860 {
 861         log_err("fio: debug tracing not included in build\n");
 862         return 1;
 863 }
 864 #endif
 865
 866 static int parse_cmd_line(int argc, char *argv[])
 867 {
 868         struct thread_data *td = NULL;
 869         int c, ini_idx = 0, lidx, ret = 0, do_exit = 0, exit_val = 0;
 870
 871         while ((c = getopt_long_only(argc, argv, "", long_options, &lidx)) != -1) {
 872                 switch (c) {
 873                 case 't':
 874                         def_timeout = atoi(optarg);
 875                         break;
 876                 case 'l':
 877                         write_lat_log = 1;
 878                         break;
 879                 case 'w':
 880                         write_bw_log = 1;
 881                         break;
 882                 case 'o':
 883                         f_out = fopen(optarg, "w+");
 884                         if (!f_out) {
 885                                 perror("fopen output");
 886                                 exit(1);
 887                         }
 888                         f_err = f_out;
 889                         break;
 890                 case 'm':
 891                         terse_output = 1;
 892                         break;
 893                 case 'h':
 894                         usage(argv[0]);
 895                         exit(0);
 896                 case 'c':
 897                         exit(fio_show_option_help(optarg));
 898                 case 's':
 899                         dump_cmdline = 1;
 900                         break;
 901                 case 'r':
 902                         read_only = 1;
 903                         break;
 904                 case 'v':
 905                         printf("%s\n", fio_version_string);
 906                         exit(0);
 907                 case 'e':
 908                         if (!strcmp("always", optarg))
 909                                 eta_print = FIO_ETA_ALWAYS;
 910                         else if (!strcmp("never", optarg))
 911                                 eta_print = FIO_ETA_NEVER;
 912                         break;
 913                 case 'd':
 914                         if (set_debug(optarg))
 915                                 do_exit++;
 916                         break;
 917                 case 'x':
 918                         if (!strcmp(optarg, "global")) {
 919                                 log_err("fio: can't use global as only section\n");
 920                                 do_exit++;
 921                                 exit_val = 1;
 922                                 break;
 923                         }
 924                         if (job_section)
 925                                 free(job_section);
 926                         job_section = strdup(optarg);
 927                         break;
 928                 case FIO_GETOPT_JOB: {
 929                         const char *opt = long_options[lidx].name;
 930                         char *val = optarg;
 931
 932                         if (!strncmp(opt, "name", 4) && td) {
 933                                 ret = add_job(td, td->o.name ?: "fio", 0);
 934                                 if (ret) {
 935                                         put_job(td);
 936                                         return 0;
 937                                 }
 938                                 td = NULL;
 939                         }
 940                         if (!td) {
 941                                 int is_section = !strncmp(opt, "name", 4);
 942                                 int global = 0;
 943
 944                                 if (!is_section || !strncmp(val, "global", 6))
 945                                         global = 1;
 946
 947                                 if (is_section && skip_this_section(val))
 948                                         continue;
 949
 950                                 td = get_new_job(global, &def_thread);
 951                                 if (!td)
 952                                         return 0;
 953                         }
 954
 955                         ret = fio_cmd_option_parse(td, opt, val);
 956                         break;
 957                 }
 958                 default:
 959                         do_exit++;
 960                         exit_val = 1;
 961                         break;
 962                 }
 963         }
 964
 965         if (do_exit)
 966                 exit(exit_val);
 967
 968         if (td) {
 969                 if (!ret)
 970                         ret = add_job(td, td->o.name ?: "fio", 0);
 971                 if (ret)
 972                         put_job(td);
 973         }
 974
 975         while (optind < argc) {
 976                 ini_idx++;
 977                 ini_file = realloc(ini_file, ini_idx * sizeof(char *));
 978                 ini_file[ini_idx - 1] = strdup(argv[optind]);
 979                 optind++;
 980         }
 981
 982         return ini_idx;
 983 }
 984
 985 int parse_options(int argc, char *argv[])
 986 {
 987         int job_files, i;
 988
 989         f_out = stdout;
 990         f_err = stderr;
 991
 992         fio_options_dup_and_init(long_options);
 993
 994         if (setup_thread_area())
 995                 return 1;
 996         if (fill_def_thread())
 997                 return 1;
 998
 999         job_files = parse_cmd_line(argc, argv);
1000
1001         for (i = 0; i < job_files; i++) {
1002                 if (fill_def_thread())
1003                         return 1;
1004                 if (parse_jobs_ini(ini_file[i], i))
1005                         return 1;
1006                 free(ini_file[i]);
1007         }
1008
1009         free(ini_file);
1010         options_mem_free(&def_thread);
1011
1012         if (!thread_number) {
1013                 if (dump_cmdline)
1014                         return 0;
1015
1016                 log_err("No jobs defined(s)\n");
1017                 usage(argv[0]);
1018                 return 1;
1019         }
1020
1021         return 0;
1022 }