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 <sys/ipc.h>
  12 #include <sys/shm.h>
  13 #include <sys/types.h>
  14 #include <sys/stat.h>
  15
  16 #include "fio.h"
  17 #include "parse.h"
  18 #include "smalloc.h"
  19 #include "filehash.h"
  20 #include "verify.h"
  21 #include "profile.h"
  22
  23 #include "lib/getopt.h"
  24
  25 static char fio_version_string[] = "fio 1.42";
  26
  27 #define FIO_RANDSEED            (0xb1899bedUL)
  28
  29 static char **ini_file;
  30 static int max_jobs = MAX_JOBS;
  31 static int dump_cmdline;
  32
  33 static struct thread_data def_thread;
  34 struct thread_data *threads = NULL;
  35
  36 int exitall_on_terminate = 0;
  37 int terse_output = 0;
  38 int eta_print;
  39 unsigned long long mlock_size = 0;
  40 FILE *f_out = NULL;
  41 FILE *f_err = NULL;
  42 char *job_section = NULL;
  43 char *exec_profile = NULL;
  44
  45 int write_bw_log = 0;
  46 int read_only = 0;
  47
  48 static int def_timeout;
  49 static int write_lat_log;
  50
  51 static int prev_group_jobs;
  52
  53 unsigned long fio_debug = 0;
  54 unsigned int fio_debug_jobno = -1;
  55 unsigned int *fio_debug_jobp = NULL;
  56
  57 /*
  58  * Command line options. These will contain the above, plus a few
  59  * extra that only pertain to fio itself and not jobs.
  60  */
  61 static struct option l_opts[FIO_NR_OPTIONS] = {
  62         {
  63                 .name           = "output",
  64                 .has_arg        = required_argument,
  65                 .val            = 'o',
  66         },
  67         {
  68                 .name           = "timeout",
  69                 .has_arg        = required_argument,
  70                 .val            = 't',
  71         },
  72         {
  73                 .name           = "latency-log",
  74                 .has_arg        = required_argument,
  75                 .val            = 'l',
  76         },
  77         {
  78                 .name           = "bandwidth-log",
  79                 .has_arg        = required_argument,
  80                 .val            = 'b',
  81         },
  82         {
  83                 .name           = "minimal",
  84                 .has_arg        = optional_argument,
  85                 .val            = 'm',
  86         },
  87         {
  88                 .name           = "version",
  89                 .has_arg        = no_argument,
  90                 .val            = 'v',
  91         },
  92         {
  93                 .name           = "help",
  94                 .has_arg        = no_argument,
  95                 .val            = 'h',
  96         },
  97         {
  98                 .name           = "cmdhelp",
  99                 .has_arg        = optional_argument,
 100                 .val            = 'c',
 101         },
 102         {
 103                 .name           = "showcmd",
 104                 .has_arg        = no_argument,
 105                 .val            = 's',
 106         },
 107         {
 108                 .name           = "readonly",
 109                 .has_arg        = no_argument,
 110                 .val            = 'r',
 111         },
 112         {
 113                 .name           = "eta",
 114                 .has_arg        = required_argument,
 115                 .val            = 'e',
 116         },
 117         {
 118                 .name           = "debug",
 119                 .has_arg        = required_argument,
 120                 .val            = 'd',
 121         },
 122         {
 123                 .name           = "section",
 124                 .has_arg        = required_argument,
 125                 .val            = 'x',
 126         },
 127         {
 128                 .name           = "alloc-size",
 129                 .has_arg        = required_argument,
 130                 .val            = 'a',
 131         },
 132         {
 133                 .name           = "profile",
 134                 .has_arg        = required_argument,
 135                 .val            = 'p',
 136         },
 137         {
 138                 .name           = NULL,
 139         },
 140 };
 141
 142 FILE *get_f_out()
 143 {
 144         return f_out;
 145 }
 146
 147 FILE *get_f_err()
 148 {
 149         return f_err;
 150 }
 151
 152 /*
 153  * Return a free job structure.
 154  */
 155 static struct thread_data *get_new_job(int global, struct thread_data *parent)
 156 {
 157         struct thread_data *td;
 158
 159         if (global)
 160                 return &def_thread;
 161         if (thread_number >= max_jobs)
 162                 return NULL;
 163
 164         td = &threads[thread_number++];
 165         *td = *parent;
 166
 167         td->o.uid = td->o.gid = -1U;
 168
 169         dup_files(td, parent);
 170         options_mem_dupe(td);
 171
 172         profile_add_hooks(td);
 173
 174         td->thread_number = thread_number;
 175         return td;
 176 }
 177
 178 static void put_job(struct thread_data *td)
 179 {
 180         if (td == &def_thread)
 181                 return;
 182
 183         profile_td_exit(td);
 184
 185         if (td->error)
 186                 log_info("fio: %s\n", td->verror);
 187
 188         memset(&threads[td->thread_number - 1], 0, sizeof(*td));
 189         thread_number--;
 190 }
 191
 192 static int __setup_rate(struct thread_data *td, enum fio_ddir ddir)
 193 {
 194         unsigned int bs = td->o.min_bs[ddir];
 195         unsigned long long bytes_per_sec;
 196
 197         if (td->o.rate[ddir])
 198                 bytes_per_sec = td->o.rate[ddir];
 199         else
 200                 bytes_per_sec = td->o.rate_iops[ddir] * bs;
 201
 202         if (!bytes_per_sec) {
 203                 log_err("rate lower than supported\n");
 204                 return -1;
 205         }
 206
 207         td->rate_nsec_cycle[ddir] = 1000000000ULL / bytes_per_sec;
 208         td->rate_pending_usleep[ddir] = 0;
 209         return 0;
 210 }
 211
 212 static int setup_rate(struct thread_data *td)
 213 {
 214         int ret = 0;
 215
 216         if (td->o.rate[DDIR_READ] || td->o.rate_iops[DDIR_READ])
 217                 ret = __setup_rate(td, DDIR_READ);
 218         if (td->o.rate[DDIR_WRITE] || td->o.rate_iops[DDIR_WRITE])
 219                 ret |= __setup_rate(td, DDIR_WRITE);
 220
 221         return ret;
 222 }
 223
 224 static int fixed_block_size(struct thread_options *o)
 225 {
 226         return o->min_bs[DDIR_READ] == o->max_bs[DDIR_READ] &&
 227                 o->min_bs[DDIR_WRITE] == o->max_bs[DDIR_WRITE] &&
 228                 o->min_bs[DDIR_READ] == o->min_bs[DDIR_WRITE];
 229 }
 230
 231 /*
 232  * Lazy way of fixing up options that depend on each other. We could also
 233  * define option callback handlers, but this is easier.
 234  */
 235 static int fixup_options(struct thread_data *td)
 236 {
 237         struct thread_options *o = &td->o;
 238
 239 #ifndef FIO_HAVE_PSHARED_MUTEX
 240         if (!o->use_thread) {
 241                 log_info("fio: this platform does not support process shared"
 242                          " mutexes, forcing use of threads. Use the 'thread'"
 243                          " option to get rid of this warning.\n");
 244                 o->use_thread = 1;
 245         }
 246 #endif
 247
 248         if (o->write_iolog_file && o->read_iolog_file) {
 249                 log_err("fio: read iolog overrides write_iolog\n");
 250                 free(o->write_iolog_file);
 251                 o->write_iolog_file = NULL;
 252         }
 253
 254         /*
 255          * only really works for sequential io for now, and with 1 file
 256          */
 257         if (o->zone_size && td_random(td) && o->open_files == 1)
 258                 o->zone_size = 0;
 259
 260         /*
 261          * Reads can do overwrites, we always need to pre-create the file
 262          */
 263         if (td_read(td) || td_rw(td))
 264                 o->overwrite = 1;
 265
 266         if (!o->min_bs[DDIR_READ])
 267                 o->min_bs[DDIR_READ] = o->bs[DDIR_READ];
 268         if (!o->max_bs[DDIR_READ])
 269                 o->max_bs[DDIR_READ] = o->bs[DDIR_READ];
 270         if (!o->min_bs[DDIR_WRITE])
 271                 o->min_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 272         if (!o->max_bs[DDIR_WRITE])
 273                 o->max_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 274
 275         o->rw_min_bs = min(o->min_bs[DDIR_READ], o->min_bs[DDIR_WRITE]);
 276
 277         /*
 278          * For random IO, allow blockalign offset other than min_bs.
 279          */
 280         if (!o->ba[DDIR_READ] || !td_random(td))
 281                 o->ba[DDIR_READ] = o->min_bs[DDIR_READ];
 282         if (!o->ba[DDIR_WRITE] || !td_random(td))
 283                 o->ba[DDIR_WRITE] = o->min_bs[DDIR_WRITE];
 284
 285         if ((o->ba[DDIR_READ] != o->min_bs[DDIR_READ] ||
 286             o->ba[DDIR_WRITE] != o->min_bs[DDIR_WRITE]) &&
 287             !o->norandommap) {
 288                 log_err("fio: Any use of blockalign= turns off randommap\n");
 289                 o->norandommap = 1;
 290         }
 291
 292         if (!o->file_size_high)
 293                 o->file_size_high = o->file_size_low;
 294
 295         if (o->norandommap && o->verify != VERIFY_NONE
 296             && !fixed_block_size(o))  {
 297                 log_err("fio: norandommap given for variable block sizes, "
 298                         "verify disabled\n");
 299                 o->verify = VERIFY_NONE;
 300         }
 301         if (o->bs_unaligned && (o->odirect || td->io_ops->flags & FIO_RAWIO))
 302                 log_err("fio: bs_unaligned may not work with raw io\n");
 303
 304         /*
 305          * thinktime_spin must be less than thinktime
 306          */
 307         if (o->thinktime_spin > o->thinktime)
 308                 o->thinktime_spin = o->thinktime;
 309
 310         /*
 311          * The low water mark cannot be bigger than the iodepth
 312          */
 313         if (o->iodepth_low > o->iodepth || !o->iodepth_low) {
 314                 /*
 315                  * syslet work around - if the workload is sequential,
 316                  * we want to let the queue drain all the way down to
 317                  * avoid seeking between async threads
 318                  */
 319                 if (!strcmp(td->io_ops->name, "syslet-rw") && !td_random(td))
 320                         o->iodepth_low = 1;
 321                 else
 322                         o->iodepth_low = o->iodepth;
 323         }
 324
 325         /*
 326          * If batch number isn't set, default to the same as iodepth
 327          */
 328         if (o->iodepth_batch > o->iodepth || !o->iodepth_batch)
 329                 o->iodepth_batch = o->iodepth;
 330
 331         if (o->nr_files > td->files_index)
 332                 o->nr_files = td->files_index;
 333
 334         if (o->open_files > o->nr_files || !o->open_files)
 335                 o->open_files = o->nr_files;
 336
 337         if (((o->rate[0] + o->rate[1]) && (o->rate_iops[0] + o->rate_iops[1]))||
 338             ((o->ratemin[0] + o->ratemin[1]) && (o->rate_iops_min[0] +
 339                 o->rate_iops_min[1]))) {
 340                 log_err("fio: rate and rate_iops are mutually exclusive\n");
 341                 return 1;
 342         }
 343         if ((o->rate[0] < o->ratemin[0]) || (o->rate[1] < o->ratemin[1]) ||
 344             (o->rate_iops[0] < o->rate_iops_min[0]) ||
 345             (o->rate_iops[1] < o->rate_iops_min[1])) {
 346                 log_err("fio: minimum rate exceeds rate\n");
 347                 return 1;
 348         }
 349
 350         if (!o->timeout && o->time_based) {
 351                 log_err("fio: time_based requires a runtime/timeout setting\n");
 352                 o->time_based = 0;
 353         }
 354
 355         if (o->fill_device && !o->size)
 356                 o->size = -1ULL;
 357
 358         if (td_rw(td) && o->verify != VERIFY_NONE)
 359                 log_info("fio: mixed read/write workload with verify. May not "
 360                  "work as expected, unless you pre-populated the file\n");
 361
 362         if (o->verify != VERIFY_NONE) {
 363                 o->refill_buffers = 1;
 364                 if (o->max_bs[DDIR_WRITE] != o->min_bs[DDIR_WRITE] &&
 365                     !o->verify_interval)
 366                         o->verify_interval = o->min_bs[DDIR_WRITE];
 367         }
 368
 369         if (o->pre_read) {
 370                 o->invalidate_cache = 0;
 371                 if (td->io_ops->flags & FIO_PIPEIO)
 372                         log_info("fio: cannot pre-read files with an IO engine"
 373                                  " that isn't seekable. Pre-read disabled.\n");
 374         }
 375
 376 #ifndef FIO_HAVE_FDATASYNC
 377         if (o->fdatasync_blocks) {
 378                 log_info("fio: this platform does not support fdatasync()"
 379                          " falling back to using fsync().  Use the 'fsync'"
 380                          " option instead of 'fdatasync' to get rid of"
 381                          " this warning\n");
 382                 o->fsync_blocks = o->fdatasync_blocks;
 383                 o->fdatasync_blocks = 0;
 384         }
 385 #endif
 386
 387         return 0;
 388 }
 389
 390 /*
 391  * This function leaks the buffer
 392  */
 393 static char *to_kmg(unsigned int val)
 394 {
 395         char *buf = malloc(32);
 396         char post[] = { 0, 'K', 'M', 'G', 'P', 'E', 0 };
 397         char *p = post;
 398
 399         do {
 400                 if (val & 1023)
 401                         break;
 402
 403                 val >>= 10;
 404                 p++;
 405         } while (*p);
 406
 407         snprintf(buf, 31, "%u%c", val, *p);
 408         return buf;
 409 }
 410
 411 /* External engines are specified by "external:name.o") */
 412 static const char *get_engine_name(const char *str)
 413 {
 414         char *p = strstr(str, ":");
 415
 416         if (!p)
 417                 return str;
 418
 419         p++;
 420         strip_blank_front(&p);
 421         strip_blank_end(p);
 422         return p;
 423 }
 424
 425 static int exists_and_not_file(const char *filename)
 426 {
 427         struct stat sb;
 428
 429         if (lstat(filename, &sb) == -1)
 430                 return 0;
 431
 432         if (S_ISREG(sb.st_mode))
 433                 return 0;
 434
 435         return 1;
 436 }
 437
 438 void td_fill_rand_seeds(struct thread_data *td)
 439 {
 440         os_random_seed(td->rand_seeds[0], &td->bsrange_state);
 441         os_random_seed(td->rand_seeds[1], &td->verify_state);
 442         os_random_seed(td->rand_seeds[2], &td->rwmix_state);
 443
 444         if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
 445                 os_random_seed(td->rand_seeds[3], &td->next_file_state);
 446
 447         os_random_seed(td->rand_seeds[5], &td->file_size_state);
 448
 449         if (!td_random(td))
 450                 return;
 451
 452         if (td->o.rand_repeatable)
 453                 td->rand_seeds[4] = FIO_RANDSEED * td->thread_number;
 454
 455         os_random_seed(td->rand_seeds[4], &td->random_state);
 456 }
 457
 458 /*
 459  * Initialize the various random states we need (random io, block size ranges,
 460  * read/write mix, etc).
 461  */
 462 static int init_random_state(struct thread_data *td)
 463 {
 464         int fd;
 465
 466         fd = open("/dev/urandom", O_RDONLY);
 467         if (fd == -1) {
 468                 td_verror(td, errno, "open");
 469                 return 1;
 470         }
 471
 472         if (read(fd, td->rand_seeds, sizeof(td->rand_seeds)) <
 473             (int) sizeof(td->rand_seeds)) {
 474                 td_verror(td, EIO, "read");
 475                 close(fd);
 476                 return 1;
 477         }
 478
 479         close(fd);
 480         td_fill_rand_seeds(td);
 481         return 0;
 482 }
 483
 484 /*
 485  * Adds a job to the list of things todo. Sanitizes the various options
 486  * to make sure we don't have conflicts, and initializes various
 487  * members of td.
 488  */
 489 static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
 490 {
 491         const char *ddir_str[] = { NULL, "read", "write", "rw", NULL,
 492                                    "randread", "randwrite", "randrw" };
 493         unsigned int i;
 494         const char *engine;
 495         char fname[PATH_MAX];
 496         int numjobs, file_alloced;
 497
 498         /*
 499          * the def_thread is just for options, it's not a real job
 500          */
 501         if (td == &def_thread)
 502                 return 0;
 503
 504         /*
 505          * if we are just dumping the output command line, don't add the job
 506          */
 507         if (dump_cmdline) {
 508                 put_job(td);
 509                 return 0;
 510         }
 511
 512         if (profile_td_init(td))
 513                 return 1;
 514
 515         engine = get_engine_name(td->o.ioengine);
 516         td->io_ops = load_ioengine(td, engine);
 517         if (!td->io_ops) {
 518                 log_err("fio: failed to load engine %s\n", engine);
 519                 goto err;
 520         }
 521
 522         if (td->o.use_thread)
 523                 nr_thread++;
 524         else
 525                 nr_process++;
 526
 527         if (td->o.odirect)
 528                 td->io_ops->flags |= FIO_RAWIO;
 529
 530         file_alloced = 0;
 531         if (!td->o.filename && !td->files_index && !td->o.read_iolog_file) {
 532                 file_alloced = 1;
 533
 534                 if (td->o.nr_files == 1 && exists_and_not_file(jobname))
 535                         add_file(td, jobname);
 536                 else {
 537                         for (i = 0; i < td->o.nr_files; i++) {
 538                                 sprintf(fname, "%s.%d.%d", jobname,
 539                                                         td->thread_number, i);
 540                                 add_file(td, fname);
 541                         }
 542                 }
 543         }
 544
 545         if (fixup_options(td))
 546                 goto err;
 547
 548         if (td->io_ops->flags & FIO_DISKLESSIO) {
 549                 struct fio_file *f;
 550
 551                 for_each_file(td, f, i)
 552                         f->real_file_size = -1ULL;
 553         }
 554
 555         td->mutex = fio_mutex_init(0);
 556
 557         td->ts.clat_stat[0].min_val = td->ts.clat_stat[1].min_val = ULONG_MAX;
 558         td->ts.slat_stat[0].min_val = td->ts.slat_stat[1].min_val = ULONG_MAX;
 559         td->ts.lat_stat[0].min_val = td->ts.lat_stat[1].min_val = ULONG_MAX;
 560         td->ts.bw_stat[0].min_val = td->ts.bw_stat[1].min_val = ULONG_MAX;
 561         td->ddir_seq_nr = td->o.ddir_seq_nr + 1;
 562
 563         if ((td->o.stonewall || td->o.new_group) && prev_group_jobs) {
 564                 prev_group_jobs = 0;
 565                 groupid++;
 566         }
 567
 568         td->groupid = groupid;
 569         prev_group_jobs++;
 570
 571         if (init_random_state(td))
 572                 goto err;
 573
 574         if (setup_rate(td))
 575                 goto err;
 576
 577         if (td->o.write_lat_log) {
 578                 setup_log(&td->ts.lat_log);
 579                 setup_log(&td->ts.slat_log);
 580                 setup_log(&td->ts.clat_log);
 581         }
 582         if (td->o.write_bw_log)
 583                 setup_log(&td->ts.bw_log);
 584
 585         if (!td->o.name)
 586                 td->o.name = strdup(jobname);
 587
 588         if (!terse_output) {
 589                 if (!job_add_num) {
 590                         if (!strcmp(td->io_ops->name, "cpuio")) {
 591                                 log_info("%s: ioengine=cpu, cpuload=%u,"
 592                                          " cpucycle=%u\n", td->o.name,
 593                                                         td->o.cpuload,
 594                                                         td->o.cpucycle);
 595                         } else {
 596                                 char *c1, *c2, *c3, *c4;
 597
 598                                 c1 = to_kmg(td->o.min_bs[DDIR_READ]);
 599                                 c2 = to_kmg(td->o.max_bs[DDIR_READ]);
 600                                 c3 = to_kmg(td->o.min_bs[DDIR_WRITE]);
 601                                 c4 = to_kmg(td->o.max_bs[DDIR_WRITE]);
 602
 603                                 log_info("%s: (g=%d): rw=%s, bs=%s-%s/%s-%s,"
 604                                          " ioengine=%s, iodepth=%u\n",
 605                                                 td->o.name, td->groupid,
 606                                                 ddir_str[td->o.td_ddir],
 607                                                 c1, c2, c3, c4,
 608                                                 td->io_ops->name,
 609                                                 td->o.iodepth);
 610
 611                                 free(c1);
 612                                 free(c2);
 613                                 free(c3);
 614                                 free(c4);
 615                         }
 616                 } else if (job_add_num == 1)
 617                         log_info("...\n");
 618         }
 619
 620         /*
 621          * recurse add identical jobs, clear numjobs and stonewall options
 622          * as they don't apply to sub-jobs
 623          */
 624         numjobs = td->o.numjobs;
 625         while (--numjobs) {
 626                 struct thread_data *td_new = get_new_job(0, td);
 627
 628                 if (!td_new)
 629                         goto err;
 630
 631                 td_new->o.numjobs = 1;
 632                 td_new->o.stonewall = 0;
 633                 td_new->o.new_group = 0;
 634
 635                 if (file_alloced) {
 636                         td_new->o.filename = NULL;
 637                         td_new->files_index = 0;
 638                         td_new->files_size = 0;
 639                         td_new->files = NULL;
 640                 }
 641
 642                 job_add_num = numjobs - 1;
 643
 644                 if (add_job(td_new, jobname, job_add_num))
 645                         goto err;
 646         }
 647
 648         return 0;
 649 err:
 650         put_job(td);
 651         return -1;
 652 }
 653
 654 /*
 655  * Parse as if 'o' was a command line
 656  */
 657 void add_job_opts(const char **o)
 658 {
 659         struct thread_data *td, *td_parent;
 660         int i, in_global = 1;
 661         char jobname[32];
 662
 663         i = 0;
 664         td_parent = td = NULL;
 665         while (o[i]) {
 666                 if (!strncmp(o[i], "name", 4)) {
 667                         in_global = 0;
 668                         if (td)
 669                                 add_job(td, jobname, 0);
 670                         td = NULL;
 671                         sprintf(jobname, "%s", o[i] + 5);
 672                 }
 673                 if (in_global && !td_parent)
 674                         td_parent = get_new_job(1, &def_thread);
 675                 else if (!in_global && !td) {
 676                         if (!td_parent)
 677                                 td_parent = &def_thread;
 678                         td = get_new_job(0, td_parent);
 679                 }
 680                 if (in_global)
 681                         fio_options_parse(td_parent, (char **) &o[i], 1);
 682                 else
 683                         fio_options_parse(td, (char **) &o[i], 1);
 684                 i++;
 685         }
 686
 687         if (td)
 688                 add_job(td, jobname, 0);
 689 }
 690
 691 static int skip_this_section(const char *name)
 692 {
 693         if (!job_section)
 694                 return 0;
 695         if (!strncmp(name, "global", 6))
 696                 return 0;
 697
 698         return strcmp(job_section, name);
 699 }
 700
 701 static int is_empty_or_comment(char *line)
 702 {
 703         unsigned int i;
 704
 705         for (i = 0; i < strlen(line); i++) {
 706                 if (line[i] == ';')
 707                         return 1;
 708                 if (line[i] == '#')
 709                         return 1;
 710                 if (!isspace(line[i]) && !iscntrl(line[i]))
 711                         return 0;
 712         }
 713
 714         return 1;
 715 }
 716
 717 /*
 718  * This is our [ini] type file parser.
 719  */
 720 static int parse_jobs_ini(char *file, int stonewall_flag)
 721 {
 722         unsigned int global;
 723         struct thread_data *td;
 724         char *string, *name;
 725         FILE *f;
 726         char *p;
 727         int ret = 0, stonewall;
 728         int first_sect = 1;
 729         int skip_fgets = 0;
 730         int inside_skip = 0;
 731         char **opts;
 732         int i, alloc_opts, num_opts;
 733
 734         if (!strcmp(file, "-"))
 735                 f = stdin;
 736         else
 737                 f = fopen(file, "r");
 738
 739         if (!f) {
 740                 perror("fopen job file");
 741                 return 1;
 742         }
 743
 744         string = malloc(4096);
 745
 746         /*
 747          * it's really 256 + small bit, 280 should suffice
 748          */
 749         name = malloc(280);
 750         memset(name, 0, 280);
 751
 752         alloc_opts = 8;
 753         opts = malloc(sizeof(char *) * alloc_opts);
 754         num_opts = 0;
 755
 756         stonewall = stonewall_flag;
 757         do {
 758                 /*
 759                  * if skip_fgets is set, we already have loaded a line we
 760                  * haven't handled.
 761                  */
 762                 if (!skip_fgets) {
 763                         p = fgets(string, 4095, f);
 764                         if (!p)
 765                                 break;
 766                 }
 767
 768                 skip_fgets = 0;
 769                 strip_blank_front(&p);
 770                 strip_blank_end(p);
 771
 772                 if (is_empty_or_comment(p))
 773                         continue;
 774                 if (sscanf(p, "[%255s]", name) != 1) {
 775                         if (inside_skip)
 776                                 continue;
 777                         log_err("fio: option <%s> outside of [] job section\n",
 778                                                                         p);
 779                         break;
 780                 }
 781
 782                 name[strlen(name) - 1] = '\0';
 783
 784                 if (skip_this_section(name)) {
 785                         inside_skip = 1;
 786                         continue;
 787                 } else
 788                         inside_skip = 0;
 789
 790                 global = !strncmp(name, "global", 6);
 791
 792                 if (dump_cmdline) {
 793                         if (first_sect)
 794                                 log_info("fio ");
 795                         if (!global)
 796                                 log_info("--name=%s ", name);
 797                         first_sect = 0;
 798                 }
 799
 800                 td = get_new_job(global, &def_thread);
 801                 if (!td) {
 802                         ret = 1;
 803                         break;
 804                 }
 805
 806                 /*
 807                  * Seperate multiple job files by a stonewall
 808                  */
 809                 if (!global && stonewall) {
 810                         td->o.stonewall = stonewall;
 811                         stonewall = 0;
 812                 }
 813
 814                 num_opts = 0;
 815                 memset(opts, 0, alloc_opts * sizeof(char *));
 816
 817                 while ((p = fgets(string, 4096, f)) != NULL) {
 818                         if (is_empty_or_comment(p))
 819                                 continue;
 820
 821                         strip_blank_front(&p);
 822
 823                         /*
 824                          * new section, break out and make sure we don't
 825                          * fgets() a new line at the top.
 826                          */
 827                         if (p[0] == '[') {
 828                                 skip_fgets = 1;
 829                                 break;
 830                         }
 831
 832                         strip_blank_end(p);
 833
 834                         if (num_opts == alloc_opts) {
 835                                 alloc_opts <<= 1;
 836                                 opts = realloc(opts,
 837                                                 alloc_opts * sizeof(char *));
 838                         }
 839
 840                         opts[num_opts] = strdup(p);
 841                         num_opts++;
 842                 }
 843
 844                 ret = fio_options_parse(td, opts, num_opts);
 845                 if (!ret) {
 846                         if (dump_cmdline)
 847                                 for (i = 0; i < num_opts; i++)
 848                                         log_info("--%s ", opts[i]);
 849
 850                         ret = add_job(td, name, 0);
 851                 } else {
 852                         log_err("fio: job %s dropped\n", name);
 853                         put_job(td);
 854                 }
 855
 856                 for (i = 0; i < num_opts; i++)
 857                         free(opts[i]);
 858                 num_opts = 0;
 859         } while (!ret);
 860
 861         if (dump_cmdline)
 862                 log_info("\n");
 863
 864         for (i = 0; i < num_opts; i++)
 865                 free(opts[i]);
 866
 867         free(string);
 868         free(name);
 869         free(opts);
 870         if (f != stdin)
 871                 fclose(f);
 872         return ret;
 873 }
 874
 875 static int fill_def_thread(void)
 876 {
 877         memset(&def_thread, 0, sizeof(def_thread));
 878
 879         fio_getaffinity(getpid(), &def_thread.o.cpumask);
 880
 881         /*
 882          * fill default options
 883          */
 884         fio_fill_default_options(&def_thread);
 885
 886         def_thread.o.timeout = def_timeout;
 887         return 0;
 888 }
 889
 890 static void free_shm(void)
 891 {
 892         struct shmid_ds sbuf;
 893
 894         if (threads) {
 895                 void *tp = threads;
 896
 897                 threads = NULL;
 898                 file_hash_exit();
 899                 fio_debug_jobp = NULL;
 900                 shmdt(tp);
 901                 shmctl(shm_id, IPC_RMID, &sbuf);
 902         }
 903
 904         scleanup();
 905 }
 906
 907 /*
 908  * The thread area is shared between the main process and the job
 909  * threads/processes. So setup a shared memory segment that will hold
 910  * all the job info. We use the end of the region for keeping track of
 911  * open files across jobs, for file sharing.
 912  */
 913 static int setup_thread_area(void)
 914 {
 915         void *hash;
 916
 917         /*
 918          * 1024 is too much on some machines, scale max_jobs if
 919          * we get a failure that looks like too large a shm segment
 920          */
 921         do {
 922                 size_t size = max_jobs * sizeof(struct thread_data);
 923
 924                 size += file_hash_size;
 925                 size += sizeof(unsigned int);
 926
 927                 shm_id = shmget(0, size, IPC_CREAT | 0600);
 928                 if (shm_id != -1)
 929                         break;
 930                 if (errno != EINVAL) {
 931                         perror("shmget");
 932                         break;
 933                 }
 934
 935                 max_jobs >>= 1;
 936         } while (max_jobs);
 937
 938         if (shm_id == -1)
 939                 return 1;
 940
 941         threads = shmat(shm_id, NULL, 0);
 942         if (threads == (void *) -1) {
 943                 perror("shmat");
 944                 return 1;
 945         }
 946
 947         memset(threads, 0, max_jobs * sizeof(struct thread_data));
 948         hash = (void *) threads + max_jobs * sizeof(struct thread_data);
 949         fio_debug_jobp = (void *) hash + file_hash_size;
 950         *fio_debug_jobp = -1;
 951         file_hash_init(hash);
 952         atexit(free_shm);
 953         return 0;
 954 }
 955
 956 static void usage(const char *name)
 957 {
 958         printf("%s\n", fio_version_string);
 959         printf("%s [options] [job options] <job file(s)>\n", name);
 960         printf("\t--debug=options\tEnable debug logging\n");
 961         printf("\t--output\tWrite output to file\n");
 962         printf("\t--timeout\tRuntime in seconds\n");
 963         printf("\t--latency-log\tGenerate per-job latency logs\n");
 964         printf("\t--bandwidth-log\tGenerate per-job bandwidth logs\n");
 965         printf("\t--minimal\tMinimal (terse) output\n");
 966         printf("\t--version\tPrint version info and exit\n");
 967         printf("\t--help\t\tPrint this page\n");
 968         printf("\t--cmdhelp=cmd\tPrint command help, \"all\" for all of"
 969                 " them\n");
 970         printf("\t--showcmd\tTurn a job file into command line options\n");
 971         printf("\t--eta=when\tWhen ETA estimate should be printed\n");
 972         printf("\t          \tMay be \"always\", \"never\" or \"auto\"\n");
 973         printf("\t--readonly\tTurn on safety read-only checks, preventing"
 974                 " writes\n");
 975         printf("\t--section=name\tOnly run specified section in job file\n");
 976         printf("\t--alloc-size=kb\tSet smalloc pool to this size in kb"
 977                 " (def 1024)\n");
 978         printf("\nFio was written by Jens Axboe <jens.axboe@oracle.com>");
 979         printf("\n                   Jens Axboe <jaxboe@fusionio.com>\n");
 980 }
 981
 982 #ifdef FIO_INC_DEBUG
 983 struct debug_level debug_levels[] = {
 984         { .name = "process",    .shift = FD_PROCESS, },
 985         { .name = "file",       .shift = FD_FILE, },
 986         { .name = "io",         .shift = FD_IO, },
 987         { .name = "mem",        .shift = FD_MEM, },
 988         { .name = "blktrace",   .shift = FD_BLKTRACE },
 989         { .name = "verify",     .shift = FD_VERIFY },
 990         { .name = "random",     .shift = FD_RANDOM },
 991         { .name = "parse",      .shift = FD_PARSE },
 992         { .name = "diskutil",   .shift = FD_DISKUTIL },
 993         { .name = "job",        .shift = FD_JOB },
 994         { .name = "mutex",      .shift = FD_MUTEX },
 995         { .name = "profile",    .shift = FD_PROFILE },
 996         { .name = "time",       .shift = FD_TIME },
 997         { .name = NULL, },
 998 };
 999
1000 static int set_debug(const char *string)
1001 {
1002         struct debug_level *dl;
1003         char *p = (char *) string;
1004         char *opt;
1005         int i;
1006
1007         if (!strcmp(string, "?") || !strcmp(string, "help")) {
1008                 int i;
1009
1010                 log_info("fio: dumping debug options:");
1011                 for (i = 0; debug_levels[i].name; i++) {
1012                         dl = &debug_levels[i];
1013                         log_info("%s,", dl->name);
1014                 }
1015                 log_info("all\n");
1016                 return 1;
1017         }
1018
1019         while ((opt = strsep(&p, ",")) != NULL) {
1020                 int found = 0;
1021
1022                 if (!strncmp(opt, "all", 3)) {
1023                         log_info("fio: set all debug options\n");
1024                         fio_debug = ~0UL;
1025                         continue;
1026                 }
1027
1028                 for (i = 0; debug_levels[i].name; i++) {
1029                         dl = &debug_levels[i];
1030                         found = !strncmp(opt, dl->name, strlen(dl->name));
1031                         if (!found)
1032                                 continue;
1033
1034                         if (dl->shift == FD_JOB) {
1035                                 opt = strchr(opt, ':');
1036                                 if (!opt) {
1037                                         log_err("fio: missing job number\n");
1038                                         break;
1039                                 }
1040                                 opt++;
1041                                 fio_debug_jobno = atoi(opt);
1042                                 log_info("fio: set debug jobno %d\n",
1043                                                         fio_debug_jobno);
1044                         } else {
1045                                 log_info("fio: set debug option %s\n", opt);
1046                                 fio_debug |= (1UL << dl->shift);
1047                         }
1048                         break;
1049                 }
1050
1051                 if (!found)
1052                         log_err("fio: debug mask %s not found\n", opt);
1053         }
1054         return 0;
1055 }
1056 #else
1057 static int set_debug(const char *string)
1058 {
1059         log_err("fio: debug tracing not included in build\n");
1060         return 1;
1061 }
1062 #endif
1063
1064 static int parse_cmd_line(int argc, char *argv[])
1065 {
1066         struct thread_data *td = NULL;
1067         int c, ini_idx = 0, lidx, ret = 0, do_exit = 0, exit_val = 0;
1068
1069         while ((c = getopt_long_only(argc, argv, "", l_opts, &lidx)) != -1) {
1070                 switch (c) {
1071                 case 'a':
1072                         smalloc_pool_size = atoi(optarg);
1073                         break;
1074                 case 't':
1075                         def_timeout = atoi(optarg);
1076                         break;
1077                 case 'l':
1078                         write_lat_log = 1;
1079                         break;
1080                 case 'b':
1081                         write_bw_log = 1;
1082                         break;
1083                 case 'o':
1084                         f_out = fopen(optarg, "w+");
1085                         if (!f_out) {
1086                                 perror("fopen output");
1087                                 exit(1);
1088                         }
1089                         f_err = f_out;
1090                         break;
1091                 case 'm':
1092                         terse_output = 1;
1093                         break;
1094                 case 'h':
1095                         usage(argv[0]);
1096                         exit(0);
1097                 case 'c':
1098                         exit(fio_show_option_help(optarg));
1099                 case 's':
1100                         dump_cmdline = 1;
1101                         break;
1102                 case 'r':
1103                         read_only = 1;
1104                         break;
1105                 case 'v':
1106                         printf("%s\n", fio_version_string);
1107                         exit(0);
1108                 case 'e':
1109                         if (!strcmp("always", optarg))
1110                                 eta_print = FIO_ETA_ALWAYS;
1111                         else if (!strcmp("never", optarg))
1112                                 eta_print = FIO_ETA_NEVER;
1113                         break;
1114                 case 'd':
1115                         if (set_debug(optarg))
1116                                 do_exit++;
1117                         break;
1118                 case 'x':
1119                         if (!strcmp(optarg, "global")) {
1120                                 log_err("fio: can't use global as only "
1121                                         "section\n");
1122                                 do_exit++;
1123                                 exit_val = 1;
1124                                 break;
1125                         }
1126                         if (job_section)
1127                                 free(job_section);
1128                         job_section = strdup(optarg);
1129                         break;
1130                 case 'p':
1131                         exec_profile = strdup(optarg);
1132                         break;
1133                 case FIO_GETOPT_JOB: {
1134                         const char *opt = l_opts[lidx].name;
1135                         char *val = optarg;
1136
1137                         if (!strncmp(opt, "name", 4) && td) {
1138                                 ret = add_job(td, td->o.name ?: "fio", 0);
1139                                 if (ret) {
1140                                         put_job(td);
1141                                         return 0;
1142                                 }
1143                                 td = NULL;
1144                         }
1145                         if (!td) {
1146                                 int is_section = !strncmp(opt, "name", 4);
1147                                 int global = 0;
1148
1149                                 if (!is_section || !strncmp(val, "global", 6))
1150                                         global = 1;
1151
1152                                 if (is_section && skip_this_section(val))
1153                                         continue;
1154
1155                                 td = get_new_job(global, &def_thread);
1156                                 if (!td)
1157                                         return 0;
1158                         }
1159
1160                         ret = fio_cmd_option_parse(td, opt, val);
1161                         break;
1162                 }
1163                 default:
1164                         do_exit++;
1165                         exit_val = 1;
1166                         break;
1167                 }
1168         }
1169
1170         if (do_exit)
1171                 exit(exit_val);
1172
1173         if (td) {
1174                 if (!ret)
1175                         ret = add_job(td, td->o.name ?: "fio", 0);
1176                 if (ret)
1177                         put_job(td);
1178         }
1179
1180         while (optind < argc) {
1181                 ini_idx++;
1182                 ini_file = realloc(ini_file, ini_idx * sizeof(char *));
1183                 ini_file[ini_idx - 1] = strdup(argv[optind]);
1184                 optind++;
1185         }
1186
1187         return ini_idx;
1188 }
1189
1190 int parse_options(int argc, char *argv[])
1191 {
1192         int job_files, i;
1193
1194         f_out = stdout;
1195         f_err = stderr;
1196
1197         fio_options_dup_and_init(l_opts);
1198
1199         if (setup_thread_area())
1200                 return 1;
1201         if (fill_def_thread())
1202                 return 1;
1203
1204         job_files = parse_cmd_line(argc, argv);
1205
1206         for (i = 0; i < job_files; i++) {
1207                 if (fill_def_thread())
1208                         return 1;
1209                 if (parse_jobs_ini(ini_file[i], i))
1210                         return 1;
1211                 free(ini_file[i]);
1212         }
1213
1214         free(ini_file);
1215         options_mem_free(&def_thread);
1216
1217         if (!thread_number) {
1218                 if (dump_cmdline)
1219                         return 0;
1220                 if (exec_profile)
1221                         return 0;
1222
1223                 log_err("No jobs defined(s)\n\n");
1224                 usage(argv[0]);
1225                 return 1;
1226         }
1227
1228         if (def_thread.o.gtod_offload) {
1229                 fio_gtod_init();
1230                 fio_gtod_offload = 1;
1231                 fio_gtod_cpu = def_thread.o.gtod_cpu;
1232         }
1233
1234         return 0;
1235 }