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 #include "profile.h"
  23
  24 static char fio_version_string[] = "fio 1.37";
  25
  26 #define FIO_RANDSEED            (0xb1899bedUL)
  27
  28 static char **ini_file;
  29 static int max_jobs = MAX_JOBS;
  30 static int dump_cmdline;
  31
  32 static struct thread_data def_thread;
  33 struct thread_data *threads = NULL;
  34
  35 int exitall_on_terminate = 0;
  36 int terse_output = 0;
  37 int eta_print;
  38 unsigned long long mlock_size = 0;
  39 FILE *f_out = NULL;
  40 FILE *f_err = NULL;
  41 char *job_section = NULL;
  42 char *exec_profile = NULL;
  43
  44 int write_bw_log = 0;
  45 int read_only = 0;
  46
  47 static int def_timeout;
  48 static int write_lat_log;
  49
  50 static int prev_group_jobs;
  51
  52 unsigned long fio_debug = 0;
  53 unsigned int fio_debug_jobno = -1;
  54 unsigned int *fio_debug_jobp = NULL;
  55
  56 /*
  57  * Command line options. These will contain the above, plus a few
  58  * extra that only pertain to fio itself and not jobs.
  59  */
  60 static struct option l_opts[FIO_NR_OPTIONS] = {
  61         {
  62                 .name           = "output",
  63                 .has_arg        = required_argument,
  64                 .val            = 'o',
  65         },
  66         {
  67                 .name           = "timeout",
  68                 .has_arg        = required_argument,
  69                 .val            = 't',
  70         },
  71         {
  72                 .name           = "latency-log",
  73                 .has_arg        = required_argument,
  74                 .val            = 'l',
  75         },
  76         {
  77                 .name           = "bandwidth-log",
  78                 .has_arg        = required_argument,
  79                 .val            = 'b',
  80         },
  81         {
  82                 .name           = "minimal",
  83                 .has_arg        = optional_argument,
  84                 .val            = 'm',
  85         },
  86         {
  87                 .name           = "version",
  88                 .has_arg        = no_argument,
  89                 .val            = 'v',
  90         },
  91         {
  92                 .name           = "help",
  93                 .has_arg        = no_argument,
  94                 .val            = 'h',
  95         },
  96         {
  97                 .name           = "cmdhelp",
  98                 .has_arg        = optional_argument,
  99                 .val            = 'c',
 100         },
 101         {
 102                 .name           = "showcmd",
 103                 .has_arg        = no_argument,
 104                 .val            = 's',
 105         },
 106         {
 107                 .name           = "readonly",
 108                 .has_arg        = no_argument,
 109                 .val            = 'r',
 110         },
 111         {
 112                 .name           = "eta",
 113                 .has_arg        = required_argument,
 114                 .val            = 'e',
 115         },
 116         {
 117                 .name           = "debug",
 118                 .has_arg        = required_argument,
 119                 .val            = 'd',
 120         },
 121         {
 122                 .name           = "section",
 123                 .has_arg        = required_argument,
 124                 .val            = 'x',
 125         },
 126         {
 127                 .name           = "alloc-size",
 128                 .has_arg        = required_argument,
 129                 .val            = 'a',
 130         },
 131         {
 132                 .name           = "profile",
 133                 .has_arg        = required_argument,
 134                 .val            = 'p',
 135         },
 136         {
 137                 .name           = NULL,
 138         },
 139 };
 140
 141 FILE *get_f_out()
 142 {
 143         return f_out;
 144 }
 145
 146 FILE *get_f_err()
 147 {
 148         return f_err;
 149 }
 150
 151 /*
 152  * Return a free job structure.
 153  */
 154 static struct thread_data *get_new_job(int global, struct thread_data *parent)
 155 {
 156         struct thread_data *td;
 157
 158         if (global)
 159                 return &def_thread;
 160         if (thread_number >= max_jobs)
 161                 return NULL;
 162
 163         td = &threads[thread_number++];
 164         *td = *parent;
 165
 166         td->o.uid = td->o.gid = -1U;
 167
 168         dup_files(td, parent);
 169         options_mem_dupe(td);
 170
 171         profile_add_hooks(td);
 172
 173         td->thread_number = thread_number;
 174         return td;
 175 }
 176
 177 static void put_job(struct thread_data *td)
 178 {
 179         if (td == &def_thread)
 180                 return;
 181
 182         if (td->error)
 183                 log_info("fio: %s\n", td->verror);
 184
 185         memset(&threads[td->thread_number - 1], 0, sizeof(*td));
 186         thread_number--;
 187 }
 188
 189 static int __setup_rate(struct thread_data *td, enum fio_ddir ddir)
 190 {
 191         unsigned int bs = td->o.min_bs[ddir];
 192         unsigned long long bytes_per_sec;
 193
 194         if (td->o.rate[ddir])
 195                 bytes_per_sec = td->o.rate[ddir];
 196         else
 197                 bytes_per_sec = td->o.rate_iops[ddir] * bs;
 198
 199         if (!bytes_per_sec) {
 200                 log_err("rate lower than supported\n");
 201                 return -1;
 202         }
 203
 204         td->rate_nsec_cycle[ddir] = 1000000000ULL / bytes_per_sec;
 205         td->rate_pending_usleep[ddir] = 0;
 206         return 0;
 207 }
 208
 209 static int setup_rate(struct thread_data *td)
 210 {
 211         int ret = 0;
 212
 213         if (td->o.rate[DDIR_READ] || td->o.rate_iops[DDIR_READ])
 214                 ret = __setup_rate(td, DDIR_READ);
 215         if (td->o.rate[DDIR_WRITE] || td->o.rate_iops[DDIR_WRITE])
 216                 ret |= __setup_rate(td, DDIR_WRITE);
 217
 218         return ret;
 219 }
 220
 221 static int fixed_block_size(struct thread_options *o)
 222 {
 223         return o->min_bs[DDIR_READ] == o->max_bs[DDIR_READ] &&
 224                 o->min_bs[DDIR_WRITE] == o->max_bs[DDIR_WRITE] &&
 225                 o->min_bs[DDIR_READ] == o->min_bs[DDIR_WRITE];
 226 }
 227
 228 /*
 229  * Lazy way of fixing up options that depend on each other. We could also
 230  * define option callback handlers, but this is easier.
 231  */
 232 static int fixup_options(struct thread_data *td)
 233 {
 234         struct thread_options *o = &td->o;
 235
 236 #ifndef FIO_HAVE_PSHARED_MUTEX
 237         if (!td->o.use_thread) {
 238                 log_info("fio: this platform does not support process shared"
 239                          " mutexes, forcing use of threads. Use the 'thread'"
 240                          " option to get rid of this warning.\n");
 241                 td->o.use_thread = 1;
 242         }
 243 #endif
 244
 245         if (o->write_iolog_file && o->read_iolog_file) {
 246                 log_err("fio: read iolog overrides write_iolog\n");
 247                 free(o->write_iolog_file);
 248                 o->write_iolog_file = NULL;
 249         }
 250
 251         /*
 252          * only really works for sequential io for now, and with 1 file
 253          */
 254         if (o->zone_size && td_random(td) && o->open_files == 1)
 255                 o->zone_size = 0;
 256
 257         /*
 258          * Reads can do overwrites, we always need to pre-create the file
 259          */
 260         if (td_read(td) || td_rw(td))
 261                 o->overwrite = 1;
 262
 263         if (!o->min_bs[DDIR_READ])
 264                 o->min_bs[DDIR_READ] = o->bs[DDIR_READ];
 265         if (!o->max_bs[DDIR_READ])
 266                 o->max_bs[DDIR_READ] = o->bs[DDIR_READ];
 267         if (!o->min_bs[DDIR_WRITE])
 268                 o->min_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 269         if (!o->max_bs[DDIR_WRITE])
 270                 o->max_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 271
 272         o->rw_min_bs = min(o->min_bs[DDIR_READ], o->min_bs[DDIR_WRITE]);
 273
 274         /*
 275          * For random IO, allow blockalign offset other than min_bs.
 276          */
 277         if (!o->ba[DDIR_READ] || !td_random(td))
 278                 o->ba[DDIR_READ] = o->min_bs[DDIR_READ];
 279         if (!o->ba[DDIR_WRITE] || !td_random(td))
 280                 o->ba[DDIR_WRITE] = o->min_bs[DDIR_WRITE];
 281
 282         if ((o->ba[DDIR_READ] != o->min_bs[DDIR_READ] ||
 283             o->ba[DDIR_WRITE] != o->min_bs[DDIR_WRITE]) &&
 284             !td->o.norandommap) {
 285                 log_err("fio: Any use of blockalign= turns off randommap\n");
 286                 td->o.norandommap = 1;
 287         }
 288
 289         if (!o->file_size_high)
 290                 o->file_size_high = o->file_size_low;
 291
 292         if (o->norandommap && o->verify != VERIFY_NONE
 293             && !fixed_block_size(o))  {
 294                 log_err("fio: norandommap given for variable block sizes, "
 295                         "verify disabled\n");
 296                 o->verify = VERIFY_NONE;
 297         }
 298         if (o->bs_unaligned && (o->odirect || td->io_ops->flags & FIO_RAWIO))
 299                 log_err("fio: bs_unaligned may not work with raw io\n");
 300
 301         /*
 302          * thinktime_spin must be less than thinktime
 303          */
 304         if (o->thinktime_spin > o->thinktime)
 305                 o->thinktime_spin = o->thinktime;
 306
 307         /*
 308          * The low water mark cannot be bigger than the iodepth
 309          */
 310         if (o->iodepth_low > o->iodepth || !o->iodepth_low) {
 311                 /*
 312                  * syslet work around - if the workload is sequential,
 313                  * we want to let the queue drain all the way down to
 314                  * avoid seeking between async threads
 315                  */
 316                 if (!strcmp(td->io_ops->name, "syslet-rw") && !td_random(td))
 317                         o->iodepth_low = 1;
 318                 else
 319                         o->iodepth_low = o->iodepth;
 320         }
 321
 322         /*
 323          * If batch number isn't set, default to the same as iodepth
 324          */
 325         if (o->iodepth_batch > o->iodepth || !o->iodepth_batch)
 326                 o->iodepth_batch = o->iodepth;
 327
 328         if (o->nr_files > td->files_index)
 329                 o->nr_files = td->files_index;
 330
 331         if (o->open_files > o->nr_files || !o->open_files)
 332                 o->open_files = o->nr_files;
 333
 334         if (((o->rate[0] + o->rate[1]) && (o->rate_iops[0] + o->rate_iops[1]))||
 335             ((o->ratemin[0] + o->ratemin[1]) && (o->rate_iops_min[0] +
 336                 o->rate_iops_min[1]))) {
 337                 log_err("fio: rate and rate_iops are mutually exclusive\n");
 338                 return 1;
 339         }
 340         if ((o->rate[0] < o->ratemin[0]) || (o->rate[1] < o->ratemin[1]) ||
 341             (o->rate_iops[0] < o->rate_iops_min[0]) ||
 342             (o->rate_iops[1] < o->rate_iops_min[1])) {
 343                 log_err("fio: minimum rate exceeds rate\n");
 344                 return 1;
 345         }
 346
 347         if (!o->timeout && o->time_based) {
 348                 log_err("fio: time_based requires a runtime/timeout setting\n");
 349                 o->time_based = 0;
 350         }
 351
 352         if (o->fill_device && !o->size)
 353                 o->size = -1ULL;
 354
 355         if (td_rw(td) && td->o.verify != VERIFY_NONE)
 356                 log_info("fio: mixed read/write workload with verify. May not "
 357                  "work as expected, unless you pre-populated the file\n");
 358
 359         if (td->o.verify != VERIFY_NONE)
 360                 td->o.refill_buffers = 1;
 361
 362         if (td->o.pre_read) {
 363                 td->o.invalidate_cache = 0;
 364                 if (td->io_ops->flags & FIO_PIPEIO)
 365                         log_info("fio: cannot pre-read files with an IO engine"
 366                                  " that isn't seekable. Pre-read disabled.\n");
 367         }
 368
 369 #ifndef FIO_HAVE_FDATASYNC
 370         if (td->o.fdatasync_blocks) {
 371                 log_info("fio: this platform does not support fdatasync()"
 372                          " falling back to using fsync().  Use the 'fsync'"
 373                          " option instead of 'fdatasync' to get rid of"
 374                          " this warning\n");
 375                 td->o.fsync_blocks = td->o.fdatasync_blocks;
 376                 td->o.fdatasync_blocks = 0;
 377         }
 378 #endif
 379
 380         return 0;
 381 }
 382
 383 /*
 384  * This function leaks the buffer
 385  */
 386 static char *to_kmg(unsigned int val)
 387 {
 388         char *buf = malloc(32);
 389         char post[] = { 0, 'K', 'M', 'G', 'P', 'E', 0 };
 390         char *p = post;
 391
 392         do {
 393                 if (val & 1023)
 394                         break;
 395
 396                 val >>= 10;
 397                 p++;
 398         } while (*p);
 399
 400         snprintf(buf, 31, "%u%c", val, *p);
 401         return buf;
 402 }
 403
 404 /* External engines are specified by "external:name.o") */
 405 static const char *get_engine_name(const char *str)
 406 {
 407         char *p = strstr(str, ":");
 408
 409         if (!p)
 410                 return str;
 411
 412         p++;
 413         strip_blank_front(&p);
 414         strip_blank_end(p);
 415         return p;
 416 }
 417
 418 static int exists_and_not_file(const char *filename)
 419 {
 420         struct stat sb;
 421
 422         if (lstat(filename, &sb) == -1)
 423                 return 0;
 424
 425         if (S_ISREG(sb.st_mode))
 426                 return 0;
 427
 428         return 1;
 429 }
 430
 431 void td_fill_rand_seeds(struct thread_data *td)
 432 {
 433         os_random_seed(td->rand_seeds[0], &td->bsrange_state);
 434         os_random_seed(td->rand_seeds[1], &td->verify_state);
 435         os_random_seed(td->rand_seeds[2], &td->rwmix_state);
 436
 437         if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
 438                 os_random_seed(td->rand_seeds[3], &td->next_file_state);
 439
 440         os_random_seed(td->rand_seeds[5], &td->file_size_state);
 441
 442         if (!td_random(td))
 443                 return;
 444
 445         if (td->o.rand_repeatable)
 446                 td->rand_seeds[4] = FIO_RANDSEED * td->thread_number;
 447
 448         os_random_seed(td->rand_seeds[4], &td->random_state);
 449 }
 450
 451 /*
 452  * Initialize the various random states we need (random io, block size ranges,
 453  * read/write mix, etc).
 454  */
 455 static int init_random_state(struct thread_data *td)
 456 {
 457         int fd;
 458
 459         fd = open("/dev/urandom", O_RDONLY);
 460         if (fd == -1) {
 461                 td_verror(td, errno, "open");
 462                 return 1;
 463         }
 464
 465         if (read(fd, td->rand_seeds, sizeof(td->rand_seeds)) <
 466             (int) sizeof(td->rand_seeds)) {
 467                 td_verror(td, EIO, "read");
 468                 close(fd);
 469                 return 1;
 470         }
 471
 472         close(fd);
 473         td_fill_rand_seeds(td);
 474         return 0;
 475 }
 476
 477 /*
 478  * Adds a job to the list of things todo. Sanitizes the various options
 479  * to make sure we don't have conflicts, and initializes various
 480  * members of td.
 481  */
 482 static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
 483 {
 484         const char *ddir_str[] = { NULL, "read", "write", "rw", NULL,
 485                                    "randread", "randwrite", "randrw" };
 486         unsigned int i;
 487         const char *engine;
 488         char fname[PATH_MAX];
 489         int numjobs, file_alloced;
 490
 491         /*
 492          * the def_thread is just for options, it's not a real job
 493          */
 494         if (td == &def_thread)
 495                 return 0;
 496
 497         /*
 498          * if we are just dumping the output command line, don't add the job
 499          */
 500         if (dump_cmdline) {
 501                 put_job(td);
 502                 return 0;
 503         }
 504
 505         engine = get_engine_name(td->o.ioengine);
 506         td->io_ops = load_ioengine(td, engine);
 507         if (!td->io_ops) {
 508                 log_err("fio: failed to load engine %s\n", engine);
 509                 goto err;
 510         }
 511
 512         if (td->o.use_thread)
 513                 nr_thread++;
 514         else
 515                 nr_process++;
 516
 517         if (td->o.odirect)
 518                 td->io_ops->flags |= FIO_RAWIO;
 519
 520         file_alloced = 0;
 521         if (!td->o.filename && !td->files_index && !td->o.read_iolog_file) {
 522                 file_alloced = 1;
 523
 524                 if (td->o.nr_files == 1 && exists_and_not_file(jobname))
 525                         add_file(td, jobname);
 526                 else {
 527                         for (i = 0; i < td->o.nr_files; i++) {
 528                                 sprintf(fname, "%s.%d.%d", jobname,
 529                                                         td->thread_number, i);
 530                                 add_file(td, fname);
 531                         }
 532                 }
 533         }
 534
 535         if (fixup_options(td))
 536                 goto err;
 537
 538         if (td->io_ops->flags & FIO_DISKLESSIO) {
 539                 struct fio_file *f;
 540
 541                 for_each_file(td, f, i)
 542                         f->real_file_size = -1ULL;
 543         }
 544
 545         td->mutex = fio_mutex_init(0);
 546
 547         td->ts.clat_stat[0].min_val = td->ts.clat_stat[1].min_val = ULONG_MAX;
 548         td->ts.slat_stat[0].min_val = td->ts.slat_stat[1].min_val = ULONG_MAX;
 549         td->ts.bw_stat[0].min_val = td->ts.bw_stat[1].min_val = ULONG_MAX;
 550         td->ddir_nr = td->o.ddir_nr;
 551
 552         if ((td->o.stonewall || td->o.new_group) && prev_group_jobs) {
 553                 prev_group_jobs = 0;
 554                 groupid++;
 555         }
 556
 557         td->groupid = groupid;
 558         prev_group_jobs++;
 559
 560         if (init_random_state(td))
 561                 goto err;
 562
 563         if (setup_rate(td))
 564                 goto err;
 565
 566         if (td->o.write_lat_log) {
 567                 setup_log(&td->ts.slat_log);
 568                 setup_log(&td->ts.clat_log);
 569         }
 570         if (td->o.write_bw_log)
 571                 setup_log(&td->ts.bw_log);
 572
 573         if (!td->o.name)
 574                 td->o.name = strdup(jobname);
 575
 576         if (!terse_output) {
 577                 if (!job_add_num) {
 578                         if (!strcmp(td->io_ops->name, "cpuio")) {
 579                                 log_info("%s: ioengine=cpu, cpuload=%u,"
 580                                          " cpucycle=%u\n", td->o.name,
 581                                                         td->o.cpuload,
 582                                                         td->o.cpucycle);
 583                         } else {
 584                                 char *c1, *c2, *c3, *c4;
 585
 586                                 c1 = to_kmg(td->o.min_bs[DDIR_READ]);
 587                                 c2 = to_kmg(td->o.max_bs[DDIR_READ]);
 588                                 c3 = to_kmg(td->o.min_bs[DDIR_WRITE]);
 589                                 c4 = to_kmg(td->o.max_bs[DDIR_WRITE]);
 590
 591                                 log_info("%s: (g=%d): rw=%s, bs=%s-%s/%s-%s,"
 592                                          " ioengine=%s, iodepth=%u\n",
 593                                                 td->o.name, td->groupid,
 594                                                 ddir_str[td->o.td_ddir],
 595                                                 c1, c2, c3, c4,
 596                                                 td->io_ops->name,
 597                                                 td->o.iodepth);
 598
 599                                 free(c1);
 600                                 free(c2);
 601                                 free(c3);
 602                                 free(c4);
 603                         }
 604                 } else if (job_add_num == 1)
 605                         log_info("...\n");
 606         }
 607
 608         /*
 609          * recurse add identical jobs, clear numjobs and stonewall options
 610          * as they don't apply to sub-jobs
 611          */
 612         numjobs = td->o.numjobs;
 613         while (--numjobs) {
 614                 struct thread_data *td_new = get_new_job(0, td);
 615
 616                 if (!td_new)
 617                         goto err;
 618
 619                 td_new->o.numjobs = 1;
 620                 td_new->o.stonewall = 0;
 621                 td_new->o.new_group = 0;
 622
 623                 if (file_alloced) {
 624                         td_new->o.filename = NULL;
 625                         td_new->files_index = 0;
 626                         td_new->files_size = 0;
 627                         td_new->files = NULL;
 628                 }
 629
 630                 job_add_num = numjobs - 1;
 631
 632                 if (add_job(td_new, jobname, job_add_num))
 633                         goto err;
 634         }
 635
 636         return 0;
 637 err:
 638         put_job(td);
 639         return -1;
 640 }
 641
 642 /*
 643  * Parse as if 'o' was a command line
 644  */
 645 void add_job_opts(const char **o)
 646 {
 647         struct thread_data *td, *td_parent;
 648         int i, in_global = 1;
 649         char jobname[32];
 650
 651         i = 0;
 652         td_parent = td = NULL;
 653         while (o[i]) {
 654                 if (!strncmp(o[i], "name", 4)) {
 655                         in_global = 0;
 656                         if (td)
 657                                 add_job(td, jobname, 0);
 658                         td = NULL;
 659                         sprintf(jobname, "%s", o[i] + 5);
 660                 }
 661                 if (in_global && !td_parent)
 662                         td_parent = get_new_job(1, &def_thread);
 663                 else if (!in_global && !td) {
 664                         if (!td_parent)
 665                                 td_parent = &def_thread;
 666                         td = get_new_job(0, td_parent);
 667                 }
 668                 if (in_global)
 669                         fio_options_parse(td_parent, (char **) &o[i], 1);
 670                 else
 671                         fio_options_parse(td, (char **) &o[i], 1);
 672                 i++;
 673         }
 674
 675         if (td)
 676                 add_job(td, jobname, 0);
 677 }
 678
 679 static int skip_this_section(const char *name)
 680 {
 681         if (!job_section)
 682                 return 0;
 683         if (!strncmp(name, "global", 6))
 684                 return 0;
 685
 686         return strcmp(job_section, name);
 687 }
 688
 689 static int is_empty_or_comment(char *line)
 690 {
 691         unsigned int i;
 692
 693         for (i = 0; i < strlen(line); i++) {
 694                 if (line[i] == ';')
 695                         return 1;
 696                 if (line[i] == '#')
 697                         return 1;
 698                 if (!isspace(line[i]) && !iscntrl(line[i]))
 699                         return 0;
 700         }
 701
 702         return 1;
 703 }
 704
 705 /*
 706  * This is our [ini] type file parser.
 707  */
 708 static int parse_jobs_ini(char *file, int stonewall_flag)
 709 {
 710         unsigned int global;
 711         struct thread_data *td;
 712         char *string, *name;
 713         FILE *f;
 714         char *p;
 715         int ret = 0, stonewall;
 716         int first_sect = 1;
 717         int skip_fgets = 0;
 718         int inside_skip = 0;
 719         char **opts;
 720         int i, alloc_opts, num_opts;
 721
 722         if (!strcmp(file, "-"))
 723                 f = stdin;
 724         else
 725                 f = fopen(file, "r");
 726
 727         if (!f) {
 728                 perror("fopen job file");
 729                 return 1;
 730         }
 731
 732         string = malloc(4096);
 733
 734         /*
 735          * it's really 256 + small bit, 280 should suffice
 736          */
 737         name = malloc(280);
 738         memset(name, 0, 280);
 739
 740         alloc_opts = 8;
 741         opts = malloc(sizeof(char *) * alloc_opts);
 742         num_opts = 0;
 743
 744         stonewall = stonewall_flag;
 745         do {
 746                 /*
 747                  * if skip_fgets is set, we already have loaded a line we
 748                  * haven't handled.
 749                  */
 750                 if (!skip_fgets) {
 751                         p = fgets(string, 4095, f);
 752                         if (!p)
 753                                 break;
 754                 }
 755
 756                 skip_fgets = 0;
 757                 strip_blank_front(&p);
 758                 strip_blank_end(p);
 759
 760                 if (is_empty_or_comment(p))
 761                         continue;
 762                 if (sscanf(p, "[%255s]", name) != 1) {
 763                         if (inside_skip)
 764                                 continue;
 765                         log_err("fio: option <%s> outside of [] job section\n",
 766                                                                         p);
 767                         break;
 768                 }
 769
 770                 if (skip_this_section(name)) {
 771                         inside_skip = 1;
 772                         continue;
 773                 } else
 774                         inside_skip = 0;
 775
 776                 global = !strncmp(name, "global", 6);
 777
 778                 name[strlen(name) - 1] = '\0';
 779
 780                 if (dump_cmdline) {
 781                         if (first_sect)
 782                                 log_info("fio ");
 783                         if (!global)
 784                                 log_info("--name=%s ", name);
 785                         first_sect = 0;
 786                 }
 787
 788                 td = get_new_job(global, &def_thread);
 789                 if (!td) {
 790                         ret = 1;
 791                         break;
 792                 }
 793
 794                 /*
 795                  * Seperate multiple job files by a stonewall
 796                  */
 797                 if (!global && stonewall) {
 798                         td->o.stonewall = stonewall;
 799                         stonewall = 0;
 800                 }
 801
 802                 num_opts = 0;
 803                 memset(opts, 0, alloc_opts * sizeof(char *));
 804
 805                 while ((p = fgets(string, 4096, f)) != NULL) {
 806                         if (is_empty_or_comment(p))
 807                                 continue;
 808
 809                         strip_blank_front(&p);
 810
 811                         /*
 812                          * new section, break out and make sure we don't
 813                          * fgets() a new line at the top.
 814                          */
 815                         if (p[0] == '[') {
 816                                 skip_fgets = 1;
 817                                 break;
 818                         }
 819
 820                         strip_blank_end(p);
 821
 822                         if (num_opts == alloc_opts) {
 823                                 alloc_opts <<= 1;
 824                                 opts = realloc(opts,
 825                                                 alloc_opts * sizeof(char *));
 826                         }
 827
 828                         opts[num_opts] = strdup(p);
 829                         num_opts++;
 830                 }
 831
 832                 ret = fio_options_parse(td, opts, num_opts);
 833                 if (!ret) {
 834                         if (dump_cmdline)
 835                                 for (i = 0; i < num_opts; i++)
 836                                         log_info("--%s ", opts[i]);
 837
 838                         ret = add_job(td, name, 0);
 839                 } else {
 840                         log_err("fio: job %s dropped\n", name);
 841                         put_job(td);
 842                 }
 843
 844                 for (i = 0; i < num_opts; i++)
 845                         free(opts[i]);
 846                 num_opts = 0;
 847         } while (!ret);
 848
 849         if (dump_cmdline)
 850                 log_info("\n");
 851
 852         for (i = 0; i < num_opts; i++)
 853                 free(opts[i]);
 854
 855         free(string);
 856         free(name);
 857         free(opts);
 858         if (f != stdin)
 859                 fclose(f);
 860         return ret;
 861 }
 862
 863 static int fill_def_thread(void)
 864 {
 865         memset(&def_thread, 0, sizeof(def_thread));
 866
 867         fio_getaffinity(getpid(), &def_thread.o.cpumask);
 868
 869         /*
 870          * fill default options
 871          */
 872         fio_fill_default_options(&def_thread);
 873
 874         def_thread.o.timeout = def_timeout;
 875         def_thread.o.write_bw_log = write_bw_log;
 876         def_thread.o.write_lat_log = write_lat_log;
 877
 878         return 0;
 879 }
 880
 881 static void free_shm(void)
 882 {
 883         struct shmid_ds sbuf;
 884
 885         if (threads) {
 886                 void *tp = threads;
 887
 888                 threads = NULL;
 889                 file_hash_exit();
 890                 fio_debug_jobp = NULL;
 891                 shmdt(tp);
 892                 shmctl(shm_id, IPC_RMID, &sbuf);
 893         }
 894
 895         scleanup();
 896 }
 897
 898 /*
 899  * The thread area is shared between the main process and the job
 900  * threads/processes. So setup a shared memory segment that will hold
 901  * all the job info. We use the end of the region for keeping track of
 902  * open files across jobs, for file sharing.
 903  */
 904 static int setup_thread_area(void)
 905 {
 906         void *hash;
 907
 908         /*
 909          * 1024 is too much on some machines, scale max_jobs if
 910          * we get a failure that looks like too large a shm segment
 911          */
 912         do {
 913                 size_t size = max_jobs * sizeof(struct thread_data);
 914
 915                 size += file_hash_size;
 916                 size += sizeof(unsigned int);
 917
 918                 shm_id = shmget(0, size, IPC_CREAT | 0600);
 919                 if (shm_id != -1)
 920                         break;
 921                 if (errno != EINVAL) {
 922                         perror("shmget");
 923                         break;
 924                 }
 925
 926                 max_jobs >>= 1;
 927         } while (max_jobs);
 928
 929         if (shm_id == -1)
 930                 return 1;
 931
 932         threads = shmat(shm_id, NULL, 0);
 933         if (threads == (void *) -1) {
 934                 perror("shmat");
 935                 return 1;
 936         }
 937
 938         memset(threads, 0, max_jobs * sizeof(struct thread_data));
 939         hash = (void *) threads + max_jobs * sizeof(struct thread_data);
 940         fio_debug_jobp = (void *) hash + file_hash_size;
 941         *fio_debug_jobp = -1;
 942         file_hash_init(hash);
 943         atexit(free_shm);
 944         return 0;
 945 }
 946
 947 static void usage(const char *name)
 948 {
 949         printf("%s\n", fio_version_string);
 950         printf("%s [options] [job options] <job file(s)>\n", name);
 951         printf("\t--debug=options\tEnable debug logging\n");
 952         printf("\t--output\tWrite output to file\n");
 953         printf("\t--timeout\tRuntime in seconds\n");
 954         printf("\t--latency-log\tGenerate per-job latency logs\n");
 955         printf("\t--bandwidth-log\tGenerate per-job bandwidth logs\n");
 956         printf("\t--minimal\tMinimal (terse) output\n");
 957         printf("\t--version\tPrint version info and exit\n");
 958         printf("\t--help\t\tPrint this page\n");
 959         printf("\t--cmdhelp=cmd\tPrint command help, \"all\" for all of"
 960                 " them\n");
 961         printf("\t--showcmd\tTurn a job file into command line options\n");
 962         printf("\t--eta=when\tWhen ETA estimate should be printed\n");
 963         printf("\t          \tMay be \"always\", \"never\" or \"auto\"\n");
 964         printf("\t--readonly\tTurn on safety read-only checks, preventing"
 965                 " writes\n");
 966         printf("\t--section=name\tOnly run specified section in job file\n");
 967         printf("\t--alloc-size=kb\tSet smalloc pool to this size in kb"
 968                 " (def 1024)\n");
 969         printf("\nFio was written by Jens Axboe <jens.axboe@oracle.com>\n");
 970 }
 971
 972 #ifdef FIO_INC_DEBUG
 973 struct debug_level debug_levels[] = {
 974         { .name = "process",    .shift = FD_PROCESS, },
 975         { .name = "file",       .shift = FD_FILE, },
 976         { .name = "io",         .shift = FD_IO, },
 977         { .name = "mem",        .shift = FD_MEM, },
 978         { .name = "blktrace",   .shift = FD_BLKTRACE },
 979         { .name = "verify",     .shift = FD_VERIFY },
 980         { .name = "random",     .shift = FD_RANDOM },
 981         { .name = "parse",      .shift = FD_PARSE },
 982         { .name = "diskutil",   .shift = FD_DISKUTIL },
 983         { .name = "job",        .shift = FD_JOB },
 984         { .name = "mutex",      .shift = FD_MUTEX },
 985         { .name = "profile",    .shift = FD_PROFILE },
 986         { .name = NULL, },
 987 };
 988
 989 static int set_debug(const char *string)
 990 {
 991         struct debug_level *dl;
 992         char *p = (char *) string;
 993         char *opt;
 994         int i;
 995
 996         if (!strcmp(string, "?") || !strcmp(string, "help")) {
 997                 int i;
 998
 999                 log_info("fio: dumping debug options:");
1000                 for (i = 0; debug_levels[i].name; i++) {
1001                         dl = &debug_levels[i];
1002                         log_info("%s,", dl->name);
1003                 }
1004                 log_info("all\n");
1005                 return 1;
1006         }
1007
1008         while ((opt = strsep(&p, ",")) != NULL) {
1009                 int found = 0;
1010
1011                 if (!strncmp(opt, "all", 3)) {
1012                         log_info("fio: set all debug options\n");
1013                         fio_debug = ~0UL;
1014                         continue;
1015                 }
1016
1017                 for (i = 0; debug_levels[i].name; i++) {
1018                         dl = &debug_levels[i];
1019                         found = !strncmp(opt, dl->name, strlen(dl->name));
1020                         if (!found)
1021                                 continue;
1022
1023                         if (dl->shift == FD_JOB) {
1024                                 opt = strchr(opt, ':');
1025                                 if (!opt) {
1026                                         log_err("fio: missing job number\n");
1027                                         break;
1028                                 }
1029                                 opt++;
1030                                 fio_debug_jobno = atoi(opt);
1031                                 log_info("fio: set debug jobno %d\n",
1032                                                         fio_debug_jobno);
1033                         } else {
1034                                 log_info("fio: set debug option %s\n", opt);
1035                                 fio_debug |= (1UL << dl->shift);
1036                         }
1037                         break;
1038                 }
1039
1040                 if (!found)
1041                         log_err("fio: debug mask %s not found\n", opt);
1042         }
1043         return 0;
1044 }
1045 #else
1046 static int set_debug(const char *string)
1047 {
1048         log_err("fio: debug tracing not included in build\n");
1049         return 1;
1050 }
1051 #endif
1052
1053 static int parse_cmd_line(int argc, char *argv[])
1054 {
1055         struct thread_data *td = NULL;
1056         int c, ini_idx = 0, lidx, ret = 0, do_exit = 0, exit_val = 0;
1057
1058         while ((c = getopt_long_only(argc, argv, "", l_opts, &lidx)) != -1) {
1059                 switch (c) {
1060                 case 'a':
1061                         smalloc_pool_size = atoi(optarg);
1062                         break;
1063                 case 't':
1064                         def_timeout = atoi(optarg);
1065                         break;
1066                 case 'l':
1067                         write_lat_log = 1;
1068                         break;
1069                 case 'w':
1070                         write_bw_log = 1;
1071                         break;
1072                 case 'o':
1073                         f_out = fopen(optarg, "w+");
1074                         if (!f_out) {
1075                                 perror("fopen output");
1076                                 exit(1);
1077                         }
1078                         f_err = f_out;
1079                         break;
1080                 case 'm':
1081                         terse_output = 1;
1082                         break;
1083                 case 'h':
1084                         usage(argv[0]);
1085                         exit(0);
1086                 case 'c':
1087                         exit(fio_show_option_help(optarg));
1088                 case 's':
1089                         dump_cmdline = 1;
1090                         break;
1091                 case 'r':
1092                         read_only = 1;
1093                         break;
1094                 case 'v':
1095                         printf("%s\n", fio_version_string);
1096                         exit(0);
1097                 case 'e':
1098                         if (!strcmp("always", optarg))
1099                                 eta_print = FIO_ETA_ALWAYS;
1100                         else if (!strcmp("never", optarg))
1101                                 eta_print = FIO_ETA_NEVER;
1102                         break;
1103                 case 'd':
1104                         if (set_debug(optarg))
1105                                 do_exit++;
1106                         break;
1107                 case 'x':
1108                         if (!strcmp(optarg, "global")) {
1109                                 log_err("fio: can't use global as only "
1110                                         "section\n");
1111                                 do_exit++;
1112                                 exit_val = 1;
1113                                 break;
1114                         }
1115                         if (job_section)
1116                                 free(job_section);
1117                         job_section = strdup(optarg);
1118                         break;
1119                 case 'p':
1120                         exec_profile = strdup(optarg);
1121                         break;
1122                 case FIO_GETOPT_JOB: {
1123                         const char *opt = l_opts[lidx].name;
1124                         char *val = optarg;
1125
1126                         if (!strncmp(opt, "name", 4) && td) {
1127                                 ret = add_job(td, td->o.name ?: "fio", 0);
1128                                 if (ret) {
1129                                         put_job(td);
1130                                         return 0;
1131                                 }
1132                                 td = NULL;
1133                         }
1134                         if (!td) {
1135                                 int is_section = !strncmp(opt, "name", 4);
1136                                 int global = 0;
1137
1138                                 if (!is_section || !strncmp(val, "global", 6))
1139                                         global = 1;
1140
1141                                 if (is_section && skip_this_section(val))
1142                                         continue;
1143
1144                                 td = get_new_job(global, &def_thread);
1145                                 if (!td)
1146                                         return 0;
1147                         }
1148
1149                         ret = fio_cmd_option_parse(td, opt, val);
1150                         break;
1151                 }
1152                 default:
1153                         do_exit++;
1154                         exit_val = 1;
1155                         break;
1156                 }
1157         }
1158
1159         if (do_exit)
1160                 exit(exit_val);
1161
1162         if (td) {
1163                 if (!ret)
1164                         ret = add_job(td, td->o.name ?: "fio", 0);
1165                 if (ret)
1166                         put_job(td);
1167         }
1168
1169         while (optind < argc) {
1170                 ini_idx++;
1171                 ini_file = realloc(ini_file, ini_idx * sizeof(char *));
1172                 ini_file[ini_idx - 1] = strdup(argv[optind]);
1173                 optind++;
1174         }
1175
1176         return ini_idx;
1177 }
1178
1179 int parse_options(int argc, char *argv[])
1180 {
1181         int job_files, i;
1182
1183         f_out = stdout;
1184         f_err = stderr;
1185
1186         fio_options_dup_and_init(l_opts);
1187
1188         if (setup_thread_area())
1189                 return 1;
1190         if (fill_def_thread())
1191                 return 1;
1192
1193         job_files = parse_cmd_line(argc, argv);
1194
1195         for (i = 0; i < job_files; i++) {
1196                 if (fill_def_thread())
1197                         return 1;
1198                 if (parse_jobs_ini(ini_file[i], i))
1199                         return 1;
1200                 free(ini_file[i]);
1201         }
1202
1203         free(ini_file);
1204         options_mem_free(&def_thread);
1205
1206         if (!thread_number) {
1207                 if (dump_cmdline)
1208                         return 0;
1209                 if (exec_profile)
1210                         return 0;
1211
1212                 log_err("No jobs defined(s)\n\n");
1213                 usage(argv[0]);
1214                 return 1;
1215         }
1216
1217         if (def_thread.o.gtod_offload) {
1218                 fio_gtod_init();
1219                 fio_gtod_offload = 1;
1220                 fio_gtod_cpu = def_thread.o.gtod_cpu;
1221         }
1222
1223         return 0;
1224 }