init.c

   1 /*
   2  * This file contains job initialization and setup functions.
   3  */
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <unistd.h>
   7 #include <fcntl.h>
   8 #include <ctype.h>
   9 #include <string.h>
  10 #include <errno.h>
  11 #include <getopt.h>
  12 #include <sys/ipc.h>
  13 #include <sys/shm.h>
  14 #include <sys/types.h>
  15 #include <sys/stat.h>
  16
  17 #include "fio.h"
  18 #include "parse.h"
  19 #include "smalloc.h"
  20 #include "filehash.h"
  21 #include "verify.h"
  22
  23 static char fio_version_string[] = "fio 1.33";
  24
  25 #define FIO_RANDSEED            (0xb1899bedUL)
  26
  27 static char **ini_file;
  28 static int max_jobs = MAX_JOBS;
  29 static int dump_cmdline;
  30
  31 static struct thread_data def_thread;
  32 struct thread_data *threads = NULL;
  33
  34 int exitall_on_terminate = 0;
  35 int terse_output = 0;
  36 int eta_print;
  37 unsigned long long mlock_size = 0;
  38 FILE *f_out = NULL;
  39 FILE *f_err = NULL;
  40 char *job_section = NULL;
  41
  42 int write_bw_log = 0;
  43 int read_only = 0;
  44
  45 static int def_timeout;
  46 static int write_lat_log;
  47
  48 static int prev_group_jobs;
  49
  50 unsigned long fio_debug = 0;
  51 unsigned int fio_debug_jobno = -1;
  52 unsigned int *fio_debug_jobp = NULL;
  53
  54 /*
  55  * Command line options. These will contain the above, plus a few
  56  * extra that only pertain to fio itself and not jobs.
  57  */
  58 static struct option l_opts[FIO_NR_OPTIONS] = {
  59         {
  60                 .name           = "output",
  61                 .has_arg        = required_argument,
  62                 .val            = 'o',
  63         },
  64         {
  65                 .name           = "timeout",
  66                 .has_arg        = required_argument,
  67                 .val            = 't',
  68         },
  69         {
  70                 .name           = "latency-log",
  71                 .has_arg        = required_argument,
  72                 .val            = 'l',
  73         },
  74         {
  75                 .name           = "bandwidth-log",
  76                 .has_arg        = required_argument,
  77                 .val            = 'b',
  78         },
  79         {
  80                 .name           = "minimal",
  81                 .has_arg        = optional_argument,
  82                 .val            = 'm',
  83         },
  84         {
  85                 .name           = "version",
  86                 .has_arg        = no_argument,
  87                 .val            = 'v',
  88         },
  89         {
  90                 .name           = "help",
  91                 .has_arg        = no_argument,
  92                 .val            = 'h',
  93         },
  94         {
  95                 .name           = "cmdhelp",
  96                 .has_arg        = optional_argument,
  97                 .val            = 'c',
  98         },
  99         {
 100                 .name           = "showcmd",
 101                 .has_arg        = no_argument,
 102                 .val            = 's',
 103         },
 104         {
 105                 .name           = "readonly",
 106                 .has_arg        = no_argument,
 107                 .val            = 'r',
 108         },
 109         {
 110                 .name           = "eta",
 111                 .has_arg        = required_argument,
 112                 .val            = 'e',
 113         },
 114         {
 115                 .name           = "debug",
 116                 .has_arg        = required_argument,
 117                 .val            = 'd',
 118         },
 119         {
 120                 .name           = "section",
 121                 .has_arg        = required_argument,
 122                 .val            = 'x',
 123         },
 124         {
 125                 .name           = "alloc-size",
 126                 .has_arg        = required_argument,
 127                 .val            = 'a',
 128         },
 129         {
 130                 .name           = NULL,
 131         },
 132 };
 133
 134 FILE *get_f_out()
 135 {
 136         return f_out;
 137 }
 138
 139 FILE *get_f_err()
 140 {
 141         return f_err;
 142 }
 143
 144 /*
 145  * Return a free job structure.
 146  */
 147 static struct thread_data *get_new_job(int global, struct thread_data *parent)
 148 {
 149         struct thread_data *td;
 150
 151         if (global)
 152                 return &def_thread;
 153         if (thread_number >= max_jobs)
 154                 return NULL;
 155
 156         td = &threads[thread_number++];
 157         *td = *parent;
 158
 159         dup_files(td, parent);
 160         options_mem_dupe(td);
 161
 162         td->thread_number = thread_number;
 163         return td;
 164 }
 165
 166 static void put_job(struct thread_data *td)
 167 {
 168         if (td == &def_thread)
 169                 return;
 170
 171         if (td->error)
 172                 log_info("fio: %s\n", td->verror);
 173
 174         memset(&threads[td->thread_number - 1], 0, sizeof(*td));
 175         thread_number--;
 176 }
 177
 178 static int __setup_rate(struct thread_data *td, enum fio_ddir ddir)
 179 {
 180         unsigned int bs = td->o.min_bs[ddir];
 181         unsigned long long rate;
 182         unsigned long ios_per_msec;
 183
 184         if (td->o.rate[ddir]) {
 185                 rate = td->o.rate[ddir];
 186                 ios_per_msec = (rate * 1000LL) / bs;
 187         } else
 188                 ios_per_msec = td->o.rate_iops[ddir] * 1000UL;
 189
 190         if (!ios_per_msec) {
 191                 log_err("rate lower than supported\n");
 192                 return -1;
 193         }
 194
 195         td->rate_usec_cycle[ddir] = 1000000000ULL / ios_per_msec;
 196         td->rate_pending_usleep[ddir] = 0;
 197         return 0;
 198 }
 199
 200 static int setup_rate(struct thread_data *td)
 201 {
 202         int ret = 0;
 203
 204         if (td->o.rate[DDIR_READ] || td->o.rate_iops[DDIR_READ])
 205                 ret = __setup_rate(td, DDIR_READ);
 206         if (td->o.rate[DDIR_WRITE] || td->o.rate_iops[DDIR_WRITE])
 207                 ret |= __setup_rate(td, DDIR_WRITE);
 208
 209         return ret;
 210 }
 211
 212 static int fixed_block_size(struct thread_options *o)
 213 {
 214         return o->min_bs[DDIR_READ] == o->max_bs[DDIR_READ] &&
 215                 o->min_bs[DDIR_WRITE] == o->max_bs[DDIR_WRITE] &&
 216                 o->min_bs[DDIR_READ] == o->min_bs[DDIR_WRITE];
 217 }
 218
 219 /*
 220  * Lazy way of fixing up options that depend on each other. We could also
 221  * define option callback handlers, but this is easier.
 222  */
 223 static int fixup_options(struct thread_data *td)
 224 {
 225         struct thread_options *o = &td->o;
 226
 227 #ifndef FIO_HAVE_PSHARED_MUTEX
 228         if (!td->o.use_thread) {
 229                 log_info("fio: this platform does not support process shared"
 230                          " mutexes, forcing use of threads. Use the 'thread'"
 231                          " option to get rid of this warning.\n");
 232                 td->o.use_thread = 1;
 233         }
 234 #endif
 235
 236         if (o->write_iolog_file && o->read_iolog_file) {
 237                 log_err("fio: read iolog overrides write_iolog\n");
 238                 free(o->write_iolog_file);
 239                 o->write_iolog_file = NULL;
 240         }
 241
 242         /*
 243          * only really works for sequential io for now, and with 1 file
 244          */
 245         if (o->zone_size && td_random(td) && o->open_files == 1)
 246                 o->zone_size = 0;
 247
 248         /*
 249          * Reads can do overwrites, we always need to pre-create the file
 250          */
 251         if (td_read(td) || td_rw(td))
 252                 o->overwrite = 1;
 253
 254         if (!o->min_bs[DDIR_READ])
 255                 o->min_bs[DDIR_READ] = o->bs[DDIR_READ];
 256         if (!o->max_bs[DDIR_READ])
 257                 o->max_bs[DDIR_READ] = o->bs[DDIR_READ];
 258         if (!o->min_bs[DDIR_WRITE])
 259                 o->min_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 260         if (!o->max_bs[DDIR_WRITE])
 261                 o->max_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 262
 263         o->rw_min_bs = min(o->min_bs[DDIR_READ], o->min_bs[DDIR_WRITE]);
 264
 265         /*
 266          * For random IO, allow blockalign offset other than min_bs.
 267          */
 268         if (!o->ba[DDIR_READ] || !td_random(td))
 269                 o->ba[DDIR_READ] = o->min_bs[DDIR_READ];
 270         if (!o->ba[DDIR_WRITE] || !td_random(td))
 271                 o->ba[DDIR_WRITE] = o->min_bs[DDIR_WRITE];
 272
 273         if ((o->ba[DDIR_READ] != o->min_bs[DDIR_READ] ||
 274             o->ba[DDIR_WRITE] != o->min_bs[DDIR_WRITE]) &&
 275             !td->o.norandommap) {
 276                 log_err("fio: Any use of blockalign= turns off randommap\n");
 277                 td->o.norandommap = 1;
 278         }
 279
 280         if (!o->file_size_high)
 281                 o->file_size_high = o->file_size_low;
 282
 283         if (o->norandommap && o->verify != VERIFY_NONE
 284             && !fixed_block_size(o))  {
 285                 log_err("fio: norandommap given for variable block sizes, "
 286                         "verify disabled\n");
 287                 o->verify = VERIFY_NONE;
 288         }
 289         if (o->bs_unaligned && (o->odirect || td->io_ops->flags & FIO_RAWIO))
 290                 log_err("fio: bs_unaligned may not work with raw io\n");
 291
 292         /*
 293          * thinktime_spin must be less than thinktime
 294          */
 295         if (o->thinktime_spin > o->thinktime)
 296                 o->thinktime_spin = o->thinktime;
 297
 298         /*
 299          * The low water mark cannot be bigger than the iodepth
 300          */
 301         if (o->iodepth_low > o->iodepth || !o->iodepth_low) {
 302                 /*
 303                  * syslet work around - if the workload is sequential,
 304                  * we want to let the queue drain all the way down to
 305                  * avoid seeking between async threads
 306                  */
 307                 if (!strcmp(td->io_ops->name, "syslet-rw") && !td_random(td))
 308                         o->iodepth_low = 1;
 309                 else
 310                         o->iodepth_low = o->iodepth;
 311         }
 312
 313         /*
 314          * If batch number isn't set, default to the same as iodepth
 315          */
 316         if (o->iodepth_batch > o->iodepth || !o->iodepth_batch)
 317                 o->iodepth_batch = o->iodepth;
 318
 319         if (o->nr_files > td->files_index)
 320                 o->nr_files = td->files_index;
 321
 322         if (o->open_files > o->nr_files || !o->open_files)
 323                 o->open_files = o->nr_files;
 324
 325         if (((o->rate[0] + o->rate[1]) && (o->rate_iops[0] + o->rate_iops[1]))||
 326             ((o->ratemin[0] + o->ratemin[1]) && (o->rate_iops_min[0] +
 327                 o->rate_iops_min[1]))) {
 328                 log_err("fio: rate and rate_iops are mutually exclusive\n");
 329                 return 1;
 330         }
 331         if ((o->rate[0] < o->ratemin[0]) || (o->rate[1] < o->ratemin[1]) ||
 332             (o->rate_iops[0] < o->rate_iops_min[0]) ||
 333             (o->rate_iops[1] < o->rate_iops_min[1])) {
 334                 log_err("fio: minimum rate exceeds rate\n");
 335                 return 1;
 336         }
 337
 338         if (!o->timeout && o->time_based) {
 339                 log_err("fio: time_based requires a runtime/timeout setting\n");
 340                 o->time_based = 0;
 341         }
 342
 343         if (o->fill_device && !o->size)
 344                 o->size = -1ULL;
 345
 346         if (td_rw(td) && td->o.verify != VERIFY_NONE)
 347                 log_info("fio: mixed read/write workload with verify. May not "
 348                  "work as expected, unless you pre-populated the file\n");
 349
 350         if (td->o.verify != VERIFY_NONE)
 351                 td->o.refill_buffers = 1;
 352
 353         if (td->o.pre_read) {
 354                 td->o.invalidate_cache = 0;
 355                 if (td->io_ops->flags & FIO_PIPEIO)
 356                         log_info("fio: cannot pre-read files with an IO engine"
 357                                  " that isn't seekable. Pre-read disabled.\n");
 358         }
 359
 360         return 0;
 361 }
 362
 363 /*
 364  * This function leaks the buffer
 365  */
 366 static char *to_kmg(unsigned int val)
 367 {
 368         char *buf = malloc(32);
 369         char post[] = { 0, 'K', 'M', 'G', 'P', 'E', 0 };
 370         char *p = post;
 371
 372         do {
 373                 if (val & 1023)
 374                         break;
 375
 376                 val >>= 10;
 377                 p++;
 378         } while (*p);
 379
 380         snprintf(buf, 31, "%u%c", val, *p);
 381         return buf;
 382 }
 383
 384 /* External engines are specified by "external:name.o") */
 385 static const char *get_engine_name(const char *str)
 386 {
 387         char *p = strstr(str, ":");
 388
 389         if (!p)
 390                 return str;
 391
 392         p++;
 393         strip_blank_front(&p);
 394         strip_blank_end(p);
 395         return p;
 396 }
 397
 398 static int exists_and_not_file(const char *filename)
 399 {
 400         struct stat sb;
 401
 402         if (lstat(filename, &sb) == -1)
 403                 return 0;
 404
 405         if (S_ISREG(sb.st_mode))
 406                 return 0;
 407
 408         return 1;
 409 }
 410
 411 void td_fill_rand_seeds(struct thread_data *td)
 412 {
 413         os_random_seed(td->rand_seeds[0], &td->bsrange_state);
 414         os_random_seed(td->rand_seeds[1], &td->verify_state);
 415         os_random_seed(td->rand_seeds[2], &td->rwmix_state);
 416
 417         if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
 418                 os_random_seed(td->rand_seeds[3], &td->next_file_state);
 419
 420         os_random_seed(td->rand_seeds[5], &td->file_size_state);
 421
 422         if (!td_random(td))
 423                 return;
 424
 425         if (td->o.rand_repeatable)
 426                 td->rand_seeds[4] = FIO_RANDSEED * td->thread_number;
 427
 428         os_random_seed(td->rand_seeds[4], &td->random_state);
 429 }
 430
 431 /*
 432  * Initialize the various random states we need (random io, block size ranges,
 433  * read/write mix, etc).
 434  */
 435 static int init_random_state(struct thread_data *td)
 436 {
 437         int fd;
 438
 439         fd = open("/dev/urandom", O_RDONLY);
 440         if (fd == -1) {
 441                 td_verror(td, errno, "open");
 442                 return 1;
 443         }
 444
 445         if (read(fd, td->rand_seeds, sizeof(td->rand_seeds)) <
 446             (int) sizeof(td->rand_seeds)) {
 447                 td_verror(td, EIO, "read");
 448                 close(fd);
 449                 return 1;
 450         }
 451
 452         close(fd);
 453         td_fill_rand_seeds(td);
 454         return 0;
 455 }
 456
 457 /*
 458  * Adds a job to the list of things todo. Sanitizes the various options
 459  * to make sure we don't have conflicts, and initializes various
 460  * members of td.
 461  */
 462 static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
 463 {
 464         const char *ddir_str[] = { NULL, "read", "write", "rw", NULL,
 465                                    "randread", "randwrite", "randrw" };
 466         unsigned int i;
 467         const char *engine;
 468         char fname[PATH_MAX];
 469         int numjobs, file_alloced;
 470
 471         /*
 472          * the def_thread is just for options, it's not a real job
 473          */
 474         if (td == &def_thread)
 475                 return 0;
 476
 477         /*
 478          * if we are just dumping the output command line, don't add the job
 479          */
 480         if (dump_cmdline) {
 481                 put_job(td);
 482                 return 0;
 483         }
 484
 485         engine = get_engine_name(td->o.ioengine);
 486         td->io_ops = load_ioengine(td, engine);
 487         if (!td->io_ops) {
 488                 log_err("fio: failed to load engine %s\n", engine);
 489                 goto err;
 490         }
 491
 492         if (td->o.use_thread)
 493                 nr_thread++;
 494         else
 495                 nr_process++;
 496
 497         if (td->o.odirect)
 498                 td->io_ops->flags |= FIO_RAWIO;
 499
 500         file_alloced = 0;
 501         if (!td->o.filename && !td->files_index && !td->o.read_iolog_file) {
 502                 file_alloced = 1;
 503
 504                 if (td->o.nr_files == 1 && exists_and_not_file(jobname))
 505                         add_file(td, jobname);
 506                 else {
 507                         for (i = 0; i < td->o.nr_files; i++) {
 508                                 sprintf(fname, "%s.%d.%d", jobname,
 509                                                         td->thread_number, i);
 510                                 add_file(td, fname);
 511                         }
 512                 }
 513         }
 514
 515         if (fixup_options(td))
 516                 goto err;
 517
 518         if (td->io_ops->flags & FIO_DISKLESSIO) {
 519                 struct fio_file *f;
 520
 521                 for_each_file(td, f, i)
 522                         f->real_file_size = -1ULL;
 523         }
 524
 525         td->mutex = fio_mutex_init(0);
 526
 527         td->ts.clat_stat[0].min_val = td->ts.clat_stat[1].min_val = ULONG_MAX;
 528         td->ts.slat_stat[0].min_val = td->ts.slat_stat[1].min_val = ULONG_MAX;
 529         td->ts.bw_stat[0].min_val = td->ts.bw_stat[1].min_val = ULONG_MAX;
 530         td->ddir_nr = td->o.ddir_nr;
 531
 532         if ((td->o.stonewall || td->o.new_group) && prev_group_jobs) {
 533                 prev_group_jobs = 0;
 534                 groupid++;
 535         }
 536
 537         td->groupid = groupid;
 538         prev_group_jobs++;
 539
 540         if (init_random_state(td))
 541                 goto err;
 542
 543         if (setup_rate(td))
 544                 goto err;
 545
 546         if (td->o.write_lat_log) {
 547                 setup_log(&td->ts.slat_log);
 548                 setup_log(&td->ts.clat_log);
 549         }
 550         if (td->o.write_bw_log)
 551                 setup_log(&td->ts.bw_log);
 552
 553         if (!td->o.name)
 554                 td->o.name = strdup(jobname);
 555
 556         if (!terse_output) {
 557                 if (!job_add_num) {
 558                         if (!strcmp(td->io_ops->name, "cpuio")) {
 559                                 log_info("%s: ioengine=cpu, cpuload=%u,"
 560                                          " cpucycle=%u\n", td->o.name,
 561                                                         td->o.cpuload,
 562                                                         td->o.cpucycle);
 563                         } else {
 564                                 char *c1, *c2, *c3, *c4;
 565
 566                                 c1 = to_kmg(td->o.min_bs[DDIR_READ]);
 567                                 c2 = to_kmg(td->o.max_bs[DDIR_READ]);
 568                                 c3 = to_kmg(td->o.min_bs[DDIR_WRITE]);
 569                                 c4 = to_kmg(td->o.max_bs[DDIR_WRITE]);
 570
 571                                 log_info("%s: (g=%d): rw=%s, bs=%s-%s/%s-%s,"
 572                                          " ioengine=%s, iodepth=%u\n",
 573                                                 td->o.name, td->groupid,
 574                                                 ddir_str[td->o.td_ddir],
 575                                                 c1, c2, c3, c4,
 576                                                 td->io_ops->name,
 577                                                 td->o.iodepth);
 578
 579                                 free(c1);
 580                                 free(c2);
 581                                 free(c3);
 582                                 free(c4);
 583                         }
 584                 } else if (job_add_num == 1)
 585                         log_info("...\n");
 586         }
 587
 588         /*
 589          * recurse add identical jobs, clear numjobs and stonewall options
 590          * as they don't apply to sub-jobs
 591          */
 592         numjobs = td->o.numjobs;
 593         while (--numjobs) {
 594                 struct thread_data *td_new = get_new_job(0, td);
 595
 596                 if (!td_new)
 597                         goto err;
 598
 599                 td_new->o.numjobs = 1;
 600                 td_new->o.stonewall = 0;
 601                 td_new->o.new_group = 0;
 602
 603                 if (file_alloced) {
 604                         td_new->o.filename = NULL;
 605                         td_new->files_index = 0;
 606                         td_new->files_size = 0;
 607                         td_new->files = NULL;
 608                 }
 609
 610                 job_add_num = numjobs - 1;
 611
 612                 if (add_job(td_new, jobname, job_add_num))
 613                         goto err;
 614         }
 615
 616         return 0;
 617 err:
 618         put_job(td);
 619         return -1;
 620 }
 621
 622 static int skip_this_section(const char *name)
 623 {
 624         if (!job_section)
 625                 return 0;
 626         if (!strncmp(name, "global", 6))
 627                 return 0;
 628
 629         return strcmp(job_section, name);
 630 }
 631
 632 static int is_empty_or_comment(char *line)
 633 {
 634         unsigned int i;
 635
 636         for (i = 0; i < strlen(line); i++) {
 637                 if (line[i] == ';')
 638                         return 1;
 639                 if (line[i] == '#')
 640                         return 1;
 641                 if (!isspace(line[i]) && !iscntrl(line[i]))
 642                         return 0;
 643         }
 644
 645         return 1;
 646 }
 647
 648 /*
 649  * This is our [ini] type file parser.
 650  */
 651 static int parse_jobs_ini(char *file, int stonewall_flag)
 652 {
 653         unsigned int global;
 654         struct thread_data *td;
 655         char *string, *name;
 656         FILE *f;
 657         char *p;
 658         int ret = 0, stonewall;
 659         int first_sect = 1;
 660         int skip_fgets = 0;
 661         int inside_skip = 0;
 662         char **opts;
 663         int i, alloc_opts, num_opts;
 664
 665         if (!strcmp(file, "-"))
 666                 f = stdin;
 667         else
 668                 f = fopen(file, "r");
 669
 670         if (!f) {
 671                 perror("fopen job file");
 672                 return 1;
 673         }
 674
 675         string = malloc(4096);
 676
 677         /*
 678          * it's really 256 + small bit, 280 should suffice
 679          */
 680         name = malloc(280);
 681         memset(name, 0, 280);
 682
 683         alloc_opts = 8;
 684         opts = malloc(sizeof(char *) * alloc_opts);
 685         num_opts = 0;
 686
 687         stonewall = stonewall_flag;
 688         do {
 689                 /*
 690                  * if skip_fgets is set, we already have loaded a line we
 691                  * haven't handled.
 692                  */
 693                 if (!skip_fgets) {
 694                         p = fgets(string, 4095, f);
 695                         if (!p)
 696                                 break;
 697                 }
 698
 699                 skip_fgets = 0;
 700                 strip_blank_front(&p);
 701                 strip_blank_end(p);
 702
 703                 if (is_empty_or_comment(p))
 704                         continue;
 705                 if (sscanf(p, "[%255s]", name) != 1) {
 706                         if (inside_skip)
 707                                 continue;
 708                         log_err("fio: option <%s> outside of [] job section\n",
 709                                                                         p);
 710                         break;
 711                 }
 712
 713                 if (skip_this_section(name)) {
 714                         inside_skip = 1;
 715                         continue;
 716                 } else
 717                         inside_skip = 0;
 718
 719                 global = !strncmp(name, "global", 6);
 720
 721                 name[strlen(name) - 1] = '\0';
 722
 723                 if (dump_cmdline) {
 724                         if (first_sect)
 725                                 log_info("fio ");
 726                         if (!global)
 727                                 log_info("--name=%s ", name);
 728                         first_sect = 0;
 729                 }
 730
 731                 td = get_new_job(global, &def_thread);
 732                 if (!td) {
 733                         ret = 1;
 734                         break;
 735                 }
 736
 737                 /*
 738                  * Seperate multiple job files by a stonewall
 739                  */
 740                 if (!global && stonewall) {
 741                         td->o.stonewall = stonewall;
 742                         stonewall = 0;
 743                 }
 744
 745                 num_opts = 0;
 746                 memset(opts, 0, alloc_opts * sizeof(char *));
 747
 748                 while ((p = fgets(string, 4096, f)) != NULL) {
 749                         if (is_empty_or_comment(p))
 750                                 continue;
 751
 752                         strip_blank_front(&p);
 753
 754                         /*
 755                          * new section, break out and make sure we don't
 756                          * fgets() a new line at the top.
 757                          */
 758                         if (p[0] == '[') {
 759                                 skip_fgets = 1;
 760                                 break;
 761                         }
 762
 763                         strip_blank_end(p);
 764
 765                         if (num_opts == alloc_opts) {
 766                                 alloc_opts <<= 1;
 767                                 opts = realloc(opts,
 768                                                 alloc_opts * sizeof(char *));
 769                         }
 770
 771                         opts[num_opts] = strdup(p);
 772                         num_opts++;
 773                 }
 774
 775                 ret = fio_options_parse(td, opts, num_opts);
 776                 if (!ret) {
 777                         if (dump_cmdline)
 778                                 for (i = 0; i < num_opts; i++)
 779                                         log_info("--%s ", opts[i]);
 780
 781                         ret = add_job(td, name, 0);
 782                 } else {
 783                         log_err("fio: job %s dropped\n", name);
 784                         put_job(td);
 785                 }
 786
 787                 for (i = 0; i < num_opts; i++)
 788                         free(opts[i]);
 789                 num_opts = 0;
 790         } while (!ret);
 791
 792         if (dump_cmdline)
 793                 log_info("\n");
 794
 795         for (i = 0; i < num_opts; i++)
 796                 free(opts[i]);
 797
 798         free(string);
 799         free(name);
 800         free(opts);
 801         if (f != stdin)
 802                 fclose(f);
 803         return ret;
 804 }
 805
 806 static int fill_def_thread(void)
 807 {
 808         memset(&def_thread, 0, sizeof(def_thread));
 809
 810         fio_getaffinity(getpid(), &def_thread.o.cpumask);
 811
 812         /*
 813          * fill default options
 814          */
 815         fio_fill_default_options(&def_thread);
 816
 817         def_thread.o.timeout = def_timeout;
 818         def_thread.o.write_bw_log = write_bw_log;
 819         def_thread.o.write_lat_log = write_lat_log;
 820
 821         return 0;
 822 }
 823
 824 static void free_shm(void)
 825 {
 826         struct shmid_ds sbuf;
 827
 828         if (threads) {
 829                 void *tp = threads;
 830
 831                 threads = NULL;
 832                 file_hash_exit();
 833                 fio_debug_jobp = NULL;
 834                 shmdt(tp);
 835                 shmctl(shm_id, IPC_RMID, &sbuf);
 836         }
 837
 838         scleanup();
 839 }
 840
 841 /*
 842  * The thread area is shared between the main process and the job
 843  * threads/processes. So setup a shared memory segment that will hold
 844  * all the job info. We use the end of the region for keeping track of
 845  * open files across jobs, for file sharing.
 846  */
 847 static int setup_thread_area(void)
 848 {
 849         void *hash;
 850
 851         /*
 852          * 1024 is too much on some machines, scale max_jobs if
 853          * we get a failure that looks like too large a shm segment
 854          */
 855         do {
 856                 size_t size = max_jobs * sizeof(struct thread_data);
 857
 858                 size += file_hash_size;
 859                 size += sizeof(unsigned int);
 860
 861                 shm_id = shmget(0, size, IPC_CREAT | 0600);
 862                 if (shm_id != -1)
 863                         break;
 864                 if (errno != EINVAL) {
 865                         perror("shmget");
 866                         break;
 867                 }
 868
 869                 max_jobs >>= 1;
 870         } while (max_jobs);
 871
 872         if (shm_id == -1)
 873                 return 1;
 874
 875         threads = shmat(shm_id, NULL, 0);
 876         if (threads == (void *) -1) {
 877                 perror("shmat");
 878                 return 1;
 879         }
 880
 881         memset(threads, 0, max_jobs * sizeof(struct thread_data));
 882         hash = (void *) threads + max_jobs * sizeof(struct thread_data);
 883         fio_debug_jobp = (void *) hash + file_hash_size;
 884         *fio_debug_jobp = -1;
 885         file_hash_init(hash);
 886         atexit(free_shm);
 887         return 0;
 888 }
 889
 890 static void usage(const char *name)
 891 {
 892         printf("%s\n", fio_version_string);
 893         printf("%s [options] [job options] <job file(s)>\n", name);
 894         printf("\t--debug=options\tEnable debug logging\n");
 895         printf("\t--output\tWrite output to file\n");
 896         printf("\t--timeout\tRuntime in seconds\n");
 897         printf("\t--latency-log\tGenerate per-job latency logs\n");
 898         printf("\t--bandwidth-log\tGenerate per-job bandwidth logs\n");
 899         printf("\t--minimal\tMinimal (terse) output\n");
 900         printf("\t--version\tPrint version info and exit\n");
 901         printf("\t--help\t\tPrint this page\n");
 902         printf("\t--cmdhelp=cmd\tPrint command help, \"all\" for all of"
 903                 " them\n");
 904         printf("\t--showcmd\tTurn a job file into command line options\n");
 905         printf("\t--eta=when\tWhen ETA estimate should be printed\n");
 906         printf("\t          \tMay be \"always\", \"never\" or \"auto\"\n");
 907         printf("\t--readonly\tTurn on safety read-only checks, preventing"
 908                 " writes\n");
 909         printf("\t--section=name\tOnly run specified section in job file\n");
 910         printf("\t--alloc-size=kb\tSet smalloc pool to this size in kb"
 911                 " (def 1024)\n");
 912         printf("\nFio was written by Jens Axboe <jens.axboe@oracle.com>\n");
 913 }
 914
 915 #ifdef FIO_INC_DEBUG
 916 struct debug_level debug_levels[] = {
 917         { .name = "process",    .shift = FD_PROCESS, },
 918         { .name = "file",       .shift = FD_FILE, },
 919         { .name = "io",         .shift = FD_IO, },
 920         { .name = "mem",        .shift = FD_MEM, },
 921         { .name = "blktrace",   .shift = FD_BLKTRACE },
 922         { .name = "verify",     .shift = FD_VERIFY },
 923         { .name = "random",     .shift = FD_RANDOM },
 924         { .name = "parse",      .shift = FD_PARSE },
 925         { .name = "diskutil",   .shift = FD_DISKUTIL },
 926         { .name = "job",        .shift = FD_JOB },
 927         { .name = "mutex",      .shift = FD_MUTEX },
 928         { .name = NULL, },
 929 };
 930
 931 static int set_debug(const char *string)
 932 {
 933         struct debug_level *dl;
 934         char *p = (char *) string;
 935         char *opt;
 936         int i;
 937
 938         if (!strcmp(string, "?") || !strcmp(string, "help")) {
 939                 int i;
 940
 941                 log_info("fio: dumping debug options:");
 942                 for (i = 0; debug_levels[i].name; i++) {
 943                         dl = &debug_levels[i];
 944                         log_info("%s,", dl->name);
 945                 }
 946                 log_info("all\n");
 947                 return 1;
 948         }
 949
 950         while ((opt = strsep(&p, ",")) != NULL) {
 951                 int found = 0;
 952
 953                 if (!strncmp(opt, "all", 3)) {
 954                         log_info("fio: set all debug options\n");
 955                         fio_debug = ~0UL;
 956                         continue;
 957                 }
 958
 959                 for (i = 0; debug_levels[i].name; i++) {
 960                         dl = &debug_levels[i];
 961                         found = !strncmp(opt, dl->name, strlen(dl->name));
 962                         if (!found)
 963                                 continue;
 964
 965                         if (dl->shift == FD_JOB) {
 966                                 opt = strchr(opt, ':');
 967                                 if (!opt) {
 968                                         log_err("fio: missing job number\n");
 969                                         break;
 970                                 }
 971                                 opt++;
 972                                 fio_debug_jobno = atoi(opt);
 973                                 log_info("fio: set debug jobno %d\n",
 974                                                         fio_debug_jobno);
 975                         } else {
 976                                 log_info("fio: set debug option %s\n", opt);
 977                                 fio_debug |= (1UL << dl->shift);
 978                         }
 979                         break;
 980                 }
 981
 982                 if (!found)
 983                         log_err("fio: debug mask %s not found\n", opt);
 984         }
 985         return 0;
 986 }
 987 #else
 988 static int set_debug(const char *string)
 989 {
 990         log_err("fio: debug tracing not included in build\n");
 991         return 1;
 992 }
 993 #endif
 994
 995 static int parse_cmd_line(int argc, char *argv[])
 996 {
 997         struct thread_data *td = NULL;
 998         int c, ini_idx = 0, lidx, ret = 0, do_exit = 0, exit_val = 0;
 999
1000         while ((c = getopt_long_only(argc, argv, "", l_opts, &lidx)) != -1) {
1001                 switch (c) {
1002                 case 'a':
1003                         smalloc_pool_size = atoi(optarg);
1004                         break;
1005                 case 't':
1006                         def_timeout = atoi(optarg);
1007                         break;
1008                 case 'l':
1009                         write_lat_log = 1;
1010                         break;
1011                 case 'w':
1012                         write_bw_log = 1;
1013                         break;
1014                 case 'o':
1015                         f_out = fopen(optarg, "w+");
1016                         if (!f_out) {
1017                                 perror("fopen output");
1018                                 exit(1);
1019                         }
1020                         f_err = f_out;
1021                         break;
1022                 case 'm':
1023                         terse_output = 1;
1024                         break;
1025                 case 'h':
1026                         usage(argv[0]);
1027                         exit(0);
1028                 case 'c':
1029                         exit(fio_show_option_help(optarg));
1030                 case 's':
1031                         dump_cmdline = 1;
1032                         break;
1033                 case 'r':
1034                         read_only = 1;
1035                         break;
1036                 case 'v':
1037                         printf("%s\n", fio_version_string);
1038                         exit(0);
1039                 case 'e':
1040                         if (!strcmp("always", optarg))
1041                                 eta_print = FIO_ETA_ALWAYS;
1042                         else if (!strcmp("never", optarg))
1043                                 eta_print = FIO_ETA_NEVER;
1044                         break;
1045                 case 'd':
1046                         if (set_debug(optarg))
1047                                 do_exit++;
1048                         break;
1049                 case 'x':
1050                         if (!strcmp(optarg, "global")) {
1051                                 log_err("fio: can't use global as only "
1052                                         "section\n");
1053                                 do_exit++;
1054                                 exit_val = 1;
1055                                 break;
1056                         }
1057                         if (job_section)
1058                                 free(job_section);
1059                         job_section = strdup(optarg);
1060                         break;
1061                 case FIO_GETOPT_JOB: {
1062                         const char *opt = l_opts[lidx].name;
1063                         char *val = optarg;
1064
1065                         if (!strncmp(opt, "name", 4) && td) {
1066                                 ret = add_job(td, td->o.name ?: "fio", 0);
1067                                 if (ret) {
1068                                         put_job(td);
1069                                         return 0;
1070                                 }
1071                                 td = NULL;
1072                         }
1073                         if (!td) {
1074                                 int is_section = !strncmp(opt, "name", 4);
1075                                 int global = 0;
1076
1077                                 if (!is_section || !strncmp(val, "global", 6))
1078                                         global = 1;
1079
1080                                 if (is_section && skip_this_section(val))
1081                                         continue;
1082
1083                                 td = get_new_job(global, &def_thread);
1084                                 if (!td)
1085                                         return 0;
1086                         }
1087
1088                         ret = fio_cmd_option_parse(td, opt, val);
1089                         break;
1090                 }
1091                 default:
1092                         do_exit++;
1093                         exit_val = 1;
1094                         break;
1095                 }
1096         }
1097
1098         if (do_exit)
1099                 exit(exit_val);
1100
1101         if (td) {
1102                 if (!ret)
1103                         ret = add_job(td, td->o.name ?: "fio", 0);
1104                 if (ret)
1105                         put_job(td);
1106         }
1107
1108         while (optind < argc) {
1109                 ini_idx++;
1110                 ini_file = realloc(ini_file, ini_idx * sizeof(char *));
1111                 ini_file[ini_idx - 1] = strdup(argv[optind]);
1112                 optind++;
1113         }
1114
1115         return ini_idx;
1116 }
1117
1118 int parse_options(int argc, char *argv[])
1119 {
1120         int job_files, i;
1121
1122         f_out = stdout;
1123         f_err = stderr;
1124
1125         fio_options_dup_and_init(l_opts);
1126
1127         if (setup_thread_area())
1128                 return 1;
1129         if (fill_def_thread())
1130                 return 1;
1131
1132         job_files = parse_cmd_line(argc, argv);
1133
1134         for (i = 0; i < job_files; i++) {
1135                 if (fill_def_thread())
1136                         return 1;
1137                 if (parse_jobs_ini(ini_file[i], i))
1138                         return 1;
1139                 free(ini_file[i]);
1140         }
1141
1142         free(ini_file);
1143         options_mem_free(&def_thread);
1144
1145         if (!thread_number) {
1146                 if (dump_cmdline)
1147                         return 0;
1148
1149                 log_err("No jobs defined(s)\n\n");
1150                 usage(argv[0]);
1151                 return 1;
1152         }
1153
1154         if (def_thread.o.gtod_offload) {
1155                 fio_gtod_init();
1156                 fio_gtod_offload = 1;
1157                 fio_gtod_cpu = def_thread.o.gtod_cpu;
1158         }
1159
1160         return 0;
1161 }