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 1.29-rc1";
  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         if (td->o.mem_align) {
 361                 if (td->o.odirect && !is_power_of_2(td->o.mem_align)) {
 362                         log_err("fio: given IO mem alignment conflicts with"
 363                                         " direct=1. Resetting.\n");
 364                         td->o.mem_align = page_mask;
 365                 }
 366         }
 367
 368         return 0;
 369 }
 370
 371 /*
 372  * This function leaks the buffer
 373  */
 374 static char *to_kmg(unsigned int val)
 375 {
 376         char *buf = malloc(32);
 377         char post[] = { 0, 'K', 'M', 'G', 'P', 'E', 0 };
 378         char *p = post;
 379
 380         do {
 381                 if (val & 1023)
 382                         break;
 383
 384                 val >>= 10;
 385                 p++;
 386         } while (*p);
 387
 388         snprintf(buf, 31, "%u%c", val, *p);
 389         return buf;
 390 }
 391
 392 /* External engines are specified by "external:name.o") */
 393 static const char *get_engine_name(const char *str)
 394 {
 395         char *p = strstr(str, ":");
 396
 397         if (!p)
 398                 return str;
 399
 400         p++;
 401         strip_blank_front(&p);
 402         strip_blank_end(p);
 403         return p;
 404 }
 405
 406 static int exists_and_not_file(const char *filename)
 407 {
 408         struct stat sb;
 409
 410         if (lstat(filename, &sb) == -1)
 411                 return 0;
 412
 413         if (S_ISREG(sb.st_mode))
 414                 return 0;
 415
 416         return 1;
 417 }
 418
 419 void td_fill_rand_seeds(struct thread_data *td)
 420 {
 421         os_random_seed(td->rand_seeds[0], &td->bsrange_state);
 422         os_random_seed(td->rand_seeds[1], &td->verify_state);
 423         os_random_seed(td->rand_seeds[2], &td->rwmix_state);
 424
 425         if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
 426                 os_random_seed(td->rand_seeds[3], &td->next_file_state);
 427
 428         os_random_seed(td->rand_seeds[5], &td->file_size_state);
 429
 430         if (!td_random(td))
 431                 return;
 432
 433         if (td->o.rand_repeatable)
 434                 td->rand_seeds[4] = FIO_RANDSEED * td->thread_number;
 435
 436         os_random_seed(td->rand_seeds[4], &td->random_state);
 437 }
 438
 439 /*
 440  * Initialize the various random states we need (random io, block size ranges,
 441  * read/write mix, etc).
 442  */
 443 static int init_random_state(struct thread_data *td)
 444 {
 445         int fd;
 446
 447         fd = open("/dev/urandom", O_RDONLY);
 448         if (fd == -1) {
 449                 td_verror(td, errno, "open");
 450                 return 1;
 451         }
 452
 453         if (read(fd, td->rand_seeds, sizeof(td->rand_seeds)) <
 454             (int) sizeof(td->rand_seeds)) {
 455                 td_verror(td, EIO, "read");
 456                 close(fd);
 457                 return 1;
 458         }
 459
 460         close(fd);
 461         td_fill_rand_seeds(td);
 462         return 0;
 463 }
 464
 465 /*
 466  * Adds a job to the list of things todo. Sanitizes the various options
 467  * to make sure we don't have conflicts, and initializes various
 468  * members of td.
 469  */
 470 static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
 471 {
 472         const char *ddir_str[] = { NULL, "read", "write", "rw", NULL,
 473                                    "randread", "randwrite", "randrw" };
 474         unsigned int i;
 475         const char *engine;
 476         char fname[PATH_MAX];
 477         int numjobs, file_alloced;
 478
 479         /*
 480          * the def_thread is just for options, it's not a real job
 481          */
 482         if (td == &def_thread)
 483                 return 0;
 484
 485         /*
 486          * if we are just dumping the output command line, don't add the job
 487          */
 488         if (dump_cmdline) {
 489                 put_job(td);
 490                 return 0;
 491         }
 492
 493         engine = get_engine_name(td->o.ioengine);
 494         td->io_ops = load_ioengine(td, engine);
 495         if (!td->io_ops) {
 496                 log_err("fio: failed to load engine %s\n", engine);
 497                 goto err;
 498         }
 499
 500         if (td->o.use_thread)
 501                 nr_thread++;
 502         else
 503                 nr_process++;
 504
 505         if (td->o.odirect)
 506                 td->io_ops->flags |= FIO_RAWIO;
 507
 508         file_alloced = 0;
 509         if (!td->o.filename && !td->files_index && !td->o.read_iolog_file) {
 510                 file_alloced = 1;
 511
 512                 if (td->o.nr_files == 1 && exists_and_not_file(jobname))
 513                         add_file(td, jobname);
 514                 else {
 515                         for (i = 0; i < td->o.nr_files; i++) {
 516                                 sprintf(fname, "%s.%d.%d", jobname,
 517                                                         td->thread_number, i);
 518                                 add_file(td, fname);
 519                         }
 520                 }
 521         }
 522
 523         if (fixup_options(td))
 524                 goto err;
 525
 526         if (td->io_ops->flags & FIO_DISKLESSIO) {
 527                 struct fio_file *f;
 528
 529                 for_each_file(td, f, i)
 530                         f->real_file_size = -1ULL;
 531         }
 532
 533         td->mutex = fio_mutex_init(0);
 534
 535         td->ts.clat_stat[0].min_val = td->ts.clat_stat[1].min_val = ULONG_MAX;
 536         td->ts.slat_stat[0].min_val = td->ts.slat_stat[1].min_val = ULONG_MAX;
 537         td->ts.bw_stat[0].min_val = td->ts.bw_stat[1].min_val = ULONG_MAX;
 538         td->ddir_nr = td->o.ddir_nr;
 539
 540         if ((td->o.stonewall || td->o.numjobs > 1 || td->o.new_group)
 541              && prev_group_jobs) {
 542                 prev_group_jobs = 0;
 543                 groupid++;
 544         }
 545
 546         td->groupid = groupid;
 547         prev_group_jobs++;
 548
 549         if (init_random_state(td))
 550                 goto err;
 551
 552         if (setup_rate(td))
 553                 goto err;
 554
 555         if (td->o.write_lat_log) {
 556                 setup_log(&td->ts.slat_log);
 557                 setup_log(&td->ts.clat_log);
 558         }
 559         if (td->o.write_bw_log)
 560                 setup_log(&td->ts.bw_log);
 561
 562         if (!td->o.name)
 563                 td->o.name = strdup(jobname);
 564
 565         if (!terse_output) {
 566                 if (!job_add_num) {
 567                         if (!strcmp(td->io_ops->name, "cpuio")) {
 568                                 log_info("%s: ioengine=cpu, cpuload=%u,"
 569                                          " cpucycle=%u\n", td->o.name,
 570                                                         td->o.cpuload,
 571                                                         td->o.cpucycle);
 572                         } else {
 573                                 char *c1, *c2, *c3, *c4;
 574
 575                                 c1 = to_kmg(td->o.min_bs[DDIR_READ]);
 576                                 c2 = to_kmg(td->o.max_bs[DDIR_READ]);
 577                                 c3 = to_kmg(td->o.min_bs[DDIR_WRITE]);
 578                                 c4 = to_kmg(td->o.max_bs[DDIR_WRITE]);
 579
 580                                 log_info("%s: (g=%d): rw=%s, bs=%s-%s/%s-%s,"
 581                                          " ioengine=%s, iodepth=%u\n",
 582                                                 td->o.name, td->groupid,
 583                                                 ddir_str[td->o.td_ddir],
 584                                                 c1, c2, c3, c4,
 585                                                 td->io_ops->name,
 586                                                 td->o.iodepth);
 587
 588                                 free(c1);
 589                                 free(c2);
 590                                 free(c3);
 591                                 free(c4);
 592                         }
 593                 } else if (job_add_num == 1)
 594                         log_info("...\n");
 595         }
 596
 597         /*
 598          * recurse add identical jobs, clear numjobs and stonewall options
 599          * as they don't apply to sub-jobs
 600          */
 601         numjobs = td->o.numjobs;
 602         while (--numjobs) {
 603                 struct thread_data *td_new = get_new_job(0, td);
 604
 605                 if (!td_new)
 606                         goto err;
 607
 608                 td_new->o.numjobs = 1;
 609                 td_new->o.stonewall = 0;
 610                 td_new->o.new_group = 0;
 611
 612                 if (file_alloced) {
 613                         td_new->o.filename = NULL;
 614                         td_new->files_index = 0;
 615                         td_new->files_size = 0;
 616                         td_new->files = NULL;
 617                 }
 618
 619                 job_add_num = numjobs - 1;
 620
 621                 if (add_job(td_new, jobname, job_add_num))
 622                         goto err;
 623         }
 624
 625         return 0;
 626 err:
 627         put_job(td);
 628         return -1;
 629 }
 630
 631 static int skip_this_section(const char *name)
 632 {
 633         if (!job_section)
 634                 return 0;
 635         if (!strncmp(name, "global", 6))
 636                 return 0;
 637
 638         return strcmp(job_section, name);
 639 }
 640
 641 static int is_empty_or_comment(char *line)
 642 {
 643         unsigned int i;
 644
 645         for (i = 0; i < strlen(line); i++) {
 646                 if (line[i] == ';')
 647                         return 1;
 648                 if (line[i] == '#')
 649                         return 1;
 650                 if (!isspace(line[i]) && !iscntrl(line[i]))
 651                         return 0;
 652         }
 653
 654         return 1;
 655 }
 656
 657 /*
 658  * This is our [ini] type file parser.
 659  */
 660 static int parse_jobs_ini(char *file, int stonewall_flag)
 661 {
 662         unsigned int global;
 663         struct thread_data *td;
 664         char *string, *name;
 665         FILE *f;
 666         char *p;
 667         int ret = 0, stonewall;
 668         int first_sect = 1;
 669         int skip_fgets = 0;
 670         int inside_skip = 0;
 671         char **opts;
 672         int i, alloc_opts, num_opts;
 673
 674         if (!strcmp(file, "-"))
 675                 f = stdin;
 676         else
 677                 f = fopen(file, "r");
 678
 679         if (!f) {
 680                 perror("fopen job file");
 681                 return 1;
 682         }
 683
 684         string = malloc(4096);
 685
 686         /*
 687          * it's really 256 + small bit, 280 should suffice
 688          */
 689         name = malloc(280);
 690         memset(name, 0, 280);
 691
 692         alloc_opts = 8;
 693         opts = malloc(sizeof(char *) * alloc_opts);
 694         num_opts = 0;
 695
 696         stonewall = stonewall_flag;
 697         do {
 698                 /*
 699                  * if skip_fgets is set, we already have loaded a line we
 700                  * haven't handled.
 701                  */
 702                 if (!skip_fgets) {
 703                         p = fgets(string, 4095, f);
 704                         if (!p)
 705                                 break;
 706                 }
 707
 708                 skip_fgets = 0;
 709                 strip_blank_front(&p);
 710                 strip_blank_end(p);
 711
 712                 if (is_empty_or_comment(p))
 713                         continue;
 714                 if (sscanf(p, "[%255s]", name) != 1) {
 715                         if (inside_skip)
 716                                 continue;
 717                         log_err("fio: option <%s> outside of [] job section\n",
 718                                                                         p);
 719                         break;
 720                 }
 721
 722                 if (skip_this_section(name)) {
 723                         inside_skip = 1;
 724                         continue;
 725                 } else
 726                         inside_skip = 0;
 727
 728                 global = !strncmp(name, "global", 6);
 729
 730                 name[strlen(name) - 1] = '\0';
 731
 732                 if (dump_cmdline) {
 733                         if (first_sect)
 734                                 log_info("fio ");
 735                         if (!global)
 736                                 log_info("--name=%s ", name);
 737                         first_sect = 0;
 738                 }
 739
 740                 td = get_new_job(global, &def_thread);
 741                 if (!td) {
 742                         ret = 1;
 743                         break;
 744                 }
 745
 746                 /*
 747                  * Seperate multiple job files by a stonewall
 748                  */
 749                 if (!global && stonewall) {
 750                         td->o.stonewall = stonewall;
 751                         stonewall = 0;
 752                 }
 753
 754                 num_opts = 0;
 755                 memset(opts, 0, alloc_opts * sizeof(char *));
 756
 757                 while ((p = fgets(string, 4096, f)) != NULL) {
 758                         if (is_empty_or_comment(p))
 759                                 continue;
 760
 761                         strip_blank_front(&p);
 762
 763                         /*
 764                          * new section, break out and make sure we don't
 765                          * fgets() a new line at the top.
 766                          */
 767                         if (p[0] == '[') {
 768                                 skip_fgets = 1;
 769                                 break;
 770                         }
 771
 772                         strip_blank_end(p);
 773
 774                         if (num_opts == alloc_opts) {
 775                                 alloc_opts <<= 1;
 776                                 opts = realloc(opts,
 777                                                 alloc_opts * sizeof(char *));
 778                         }
 779
 780                         opts[num_opts] = strdup(p);
 781                         num_opts++;
 782                 }
 783
 784                 ret = fio_options_parse(td, opts, num_opts);
 785                 if (!ret) {
 786                         if (dump_cmdline)
 787                                 for (i = 0; i < num_opts; i++)
 788                                         log_info("--%s ", opts[i]);
 789
 790                         ret = add_job(td, name, 0);
 791                 } else {
 792                         log_err("fio: job %s dropped\n", name);
 793                         put_job(td);
 794                 }
 795
 796                 for (i = 0; i < num_opts; i++)
 797                         free(opts[i]);
 798                 num_opts = 0;
 799         } while (!ret);
 800
 801         if (dump_cmdline)
 802                 log_info("\n");
 803
 804         for (i = 0; i < num_opts; i++)
 805                 free(opts[i]);
 806
 807         free(string);
 808         free(name);
 809         free(opts);
 810         if (f != stdin)
 811                 fclose(f);
 812         return ret;
 813 }
 814
 815 static int fill_def_thread(void)
 816 {
 817         memset(&def_thread, 0, sizeof(def_thread));
 818
 819         fio_getaffinity(getpid(), &def_thread.o.cpumask);
 820
 821         /*
 822          * fill default options
 823          */
 824         fio_fill_default_options(&def_thread);
 825
 826         def_thread.o.timeout = def_timeout;
 827         def_thread.o.write_bw_log = write_bw_log;
 828         def_thread.o.write_lat_log = write_lat_log;
 829
 830         return 0;
 831 }
 832
 833 static void free_shm(void)
 834 {
 835         struct shmid_ds sbuf;
 836
 837         if (threads) {
 838                 void *tp = threads;
 839
 840                 threads = NULL;
 841                 file_hash_exit();
 842                 fio_debug_jobp = NULL;
 843                 shmdt(tp);
 844                 shmctl(shm_id, IPC_RMID, &sbuf);
 845         }
 846
 847         scleanup();
 848 }
 849
 850 /*
 851  * The thread area is shared between the main process and the job
 852  * threads/processes. So setup a shared memory segment that will hold
 853  * all the job info. We use the end of the region for keeping track of
 854  * open files across jobs, for file sharing.
 855  */
 856 static int setup_thread_area(void)
 857 {
 858         void *hash;
 859
 860         /*
 861          * 1024 is too much on some machines, scale max_jobs if
 862          * we get a failure that looks like too large a shm segment
 863          */
 864         do {
 865                 size_t size = max_jobs * sizeof(struct thread_data);
 866
 867                 size += file_hash_size;
 868                 size += sizeof(unsigned int);
 869
 870                 shm_id = shmget(0, size, IPC_CREAT | 0600);
 871                 if (shm_id != -1)
 872                         break;
 873                 if (errno != EINVAL) {
 874                         perror("shmget");
 875                         break;
 876                 }
 877
 878                 max_jobs >>= 1;
 879         } while (max_jobs);
 880
 881         if (shm_id == -1)
 882                 return 1;
 883
 884         threads = shmat(shm_id, NULL, 0);
 885         if (threads == (void *) -1) {
 886                 perror("shmat");
 887                 return 1;
 888         }
 889
 890         memset(threads, 0, max_jobs * sizeof(struct thread_data));
 891         hash = (void *) threads + max_jobs * sizeof(struct thread_data);
 892         fio_debug_jobp = (void *) hash + file_hash_size;
 893         *fio_debug_jobp = -1;
 894         file_hash_init(hash);
 895         atexit(free_shm);
 896         return 0;
 897 }
 898
 899 static void usage(const char *name)
 900 {
 901         printf("%s\n", fio_version_string);
 902         printf("%s [options] [job options] <job file(s)>\n", name);
 903         printf("\t--debug=options\tEnable debug logging\n");
 904         printf("\t--output\tWrite output to file\n");
 905         printf("\t--timeout\tRuntime in seconds\n");
 906         printf("\t--latency-log\tGenerate per-job latency logs\n");
 907         printf("\t--bandwidth-log\tGenerate per-job bandwidth logs\n");
 908         printf("\t--minimal\tMinimal (terse) output\n");
 909         printf("\t--version\tPrint version info and exit\n");
 910         printf("\t--help\t\tPrint this page\n");
 911         printf("\t--cmdhelp=cmd\tPrint command help, \"all\" for all of"
 912                 " them\n");
 913         printf("\t--showcmd\tTurn a job file into command line options\n");
 914         printf("\t--eta=when\tWhen ETA estimate should be printed\n");
 915         printf("\t          \tMay be \"always\", \"never\" or \"auto\"\n");
 916         printf("\t--readonly\tTurn on safety read-only checks, preventing"
 917                 " writes\n");
 918         printf("\t--section=name\tOnly run specified section in job file\n");
 919         printf("\t--alloc-size=kb\tSet smalloc pool to this size in kb"
 920                 " (def 1024)\n");
 921         printf("\nFio was written by Jens Axboe <jens.axboe@oracle.com>\n");
 922 }
 923
 924 #ifdef FIO_INC_DEBUG
 925 struct debug_level debug_levels[] = {
 926         { .name = "process",    .shift = FD_PROCESS, },
 927         { .name = "file",       .shift = FD_FILE, },
 928         { .name = "io",         .shift = FD_IO, },
 929         { .name = "mem",        .shift = FD_MEM, },
 930         { .name = "blktrace",   .shift = FD_BLKTRACE },
 931         { .name = "verify",     .shift = FD_VERIFY },
 932         { .name = "random",     .shift = FD_RANDOM },
 933         { .name = "parse",      .shift = FD_PARSE },
 934         { .name = "diskutil",   .shift = FD_DISKUTIL },
 935         { .name = "job",        .shift = FD_JOB },
 936         { .name = "mutex",      .shift = FD_MUTEX },
 937         { .name = NULL, },
 938 };
 939
 940 static int set_debug(const char *string)
 941 {
 942         struct debug_level *dl;
 943         char *p = (char *) string;
 944         char *opt;
 945         int i;
 946
 947         if (!strcmp(string, "?") || !strcmp(string, "help")) {
 948                 int i;
 949
 950                 log_info("fio: dumping debug options:");
 951                 for (i = 0; debug_levels[i].name; i++) {
 952                         dl = &debug_levels[i];
 953                         log_info("%s,", dl->name);
 954                 }
 955                 log_info("all\n");
 956                 return 1;
 957         }
 958
 959         while ((opt = strsep(&p, ",")) != NULL) {
 960                 int found = 0;
 961
 962                 if (!strncmp(opt, "all", 3)) {
 963                         log_info("fio: set all debug options\n");
 964                         fio_debug = ~0UL;
 965                         continue;
 966                 }
 967
 968                 for (i = 0; debug_levels[i].name; i++) {
 969                         dl = &debug_levels[i];
 970                         found = !strncmp(opt, dl->name, strlen(dl->name));
 971                         if (!found)
 972                                 continue;
 973
 974                         if (dl->shift == FD_JOB) {
 975                                 opt = strchr(opt, ':');
 976                                 if (!opt) {
 977                                         log_err("fio: missing job number\n");
 978                                         break;
 979                                 }
 980                                 opt++;
 981                                 fio_debug_jobno = atoi(opt);
 982                                 log_info("fio: set debug jobno %d\n",
 983                                                         fio_debug_jobno);
 984                         } else {
 985                                 log_info("fio: set debug option %s\n", opt);
 986                                 fio_debug |= (1UL << dl->shift);
 987                         }
 988                         break;
 989                 }
 990
 991                 if (!found)
 992                         log_err("fio: debug mask %s not found\n", opt);
 993         }
 994         return 0;
 995 }
 996 #else
 997 static int set_debug(const char *string)
 998 {
 999         log_err("fio: debug tracing not included in build\n");
1000         return 1;
1001 }
1002 #endif
1003
1004 static int parse_cmd_line(int argc, char *argv[])
1005 {
1006         struct thread_data *td = NULL;
1007         int c, ini_idx = 0, lidx, ret = 0, do_exit = 0, exit_val = 0;
1008
1009         while ((c = getopt_long_only(argc, argv, "", l_opts, &lidx)) != -1) {
1010                 switch (c) {
1011                 case 'a':
1012                         smalloc_pool_size = atoi(optarg);
1013                         break;
1014                 case 't':
1015                         def_timeout = atoi(optarg);
1016                         break;
1017                 case 'l':
1018                         write_lat_log = 1;
1019                         break;
1020                 case 'w':
1021                         write_bw_log = 1;
1022                         break;
1023                 case 'o':
1024                         f_out = fopen(optarg, "w+");
1025                         if (!f_out) {
1026                                 perror("fopen output");
1027                                 exit(1);
1028                         }
1029                         f_err = f_out;
1030                         break;
1031                 case 'm':
1032                         terse_output = 1;
1033                         break;
1034                 case 'h':
1035                         usage(argv[0]);
1036                         exit(0);
1037                 case 'c':
1038                         exit(fio_show_option_help(optarg));
1039                 case 's':
1040                         dump_cmdline = 1;
1041                         break;
1042                 case 'r':
1043                         read_only = 1;
1044                         break;
1045                 case 'v':
1046                         printf("%s\n", fio_version_string);
1047                         exit(0);
1048                 case 'e':
1049                         if (!strcmp("always", optarg))
1050                                 eta_print = FIO_ETA_ALWAYS;
1051                         else if (!strcmp("never", optarg))
1052                                 eta_print = FIO_ETA_NEVER;
1053                         break;
1054                 case 'd':
1055                         if (set_debug(optarg))
1056                                 do_exit++;
1057                         break;
1058                 case 'x':
1059                         if (!strcmp(optarg, "global")) {
1060                                 log_err("fio: can't use global as only "
1061                                         "section\n");
1062                                 do_exit++;
1063                                 exit_val = 1;
1064                                 break;
1065                         }
1066                         if (job_section)
1067                                 free(job_section);
1068                         job_section = strdup(optarg);
1069                         break;
1070                 case FIO_GETOPT_JOB: {
1071                         const char *opt = l_opts[lidx].name;
1072                         char *val = optarg;
1073
1074                         if (!strncmp(opt, "name", 4) && td) {
1075                                 ret = add_job(td, td->o.name ?: "fio", 0);
1076                                 if (ret) {
1077                                         put_job(td);
1078                                         return 0;
1079                                 }
1080                                 td = NULL;
1081                         }
1082                         if (!td) {
1083                                 int is_section = !strncmp(opt, "name", 4);
1084                                 int global = 0;
1085
1086                                 if (!is_section || !strncmp(val, "global", 6))
1087                                         global = 1;
1088
1089                                 if (is_section && skip_this_section(val))
1090                                         continue;
1091
1092                                 td = get_new_job(global, &def_thread);
1093                                 if (!td)
1094                                         return 0;
1095                         }
1096
1097                         ret = fio_cmd_option_parse(td, opt, val);
1098                         break;
1099                 }
1100                 default:
1101                         do_exit++;
1102                         exit_val = 1;
1103                         break;
1104                 }
1105         }
1106
1107         if (do_exit)
1108                 exit(exit_val);
1109
1110         if (td) {
1111                 if (!ret)
1112                         ret = add_job(td, td->o.name ?: "fio", 0);
1113                 if (ret)
1114                         put_job(td);
1115         }
1116
1117         while (optind < argc) {
1118                 ini_idx++;
1119                 ini_file = realloc(ini_file, ini_idx * sizeof(char *));
1120                 ini_file[ini_idx - 1] = strdup(argv[optind]);
1121                 optind++;
1122         }
1123
1124         return ini_idx;
1125 }
1126
1127 int parse_options(int argc, char *argv[])
1128 {
1129         int job_files, i;
1130
1131         f_out = stdout;
1132         f_err = stderr;
1133
1134         fio_options_dup_and_init(l_opts);
1135
1136         if (setup_thread_area())
1137                 return 1;
1138         if (fill_def_thread())
1139                 return 1;
1140
1141         job_files = parse_cmd_line(argc, argv);
1142
1143         for (i = 0; i < job_files; i++) {
1144                 if (fill_def_thread())
1145                         return 1;
1146                 if (parse_jobs_ini(ini_file[i], i))
1147                         return 1;
1148                 free(ini_file[i]);
1149         }
1150
1151         free(ini_file);
1152         options_mem_free(&def_thread);
1153
1154         if (!thread_number) {
1155                 if (dump_cmdline)
1156                         return 0;
1157
1158                 log_err("No jobs defined(s)\n\n");
1159                 usage(argv[0]);
1160                 return 1;
1161         }
1162
1163         if (def_thread.o.gtod_offload) {
1164                 fio_gtod_init();
1165                 fio_gtod_offload = 1;
1166                 fio_gtod_cpu = def_thread.o.gtod_cpu;
1167         }
1168
1169         return 0;
1170 }