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 1.28";
  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 #ifndef FIO_HAVE_CPU_AFFINITY
 237         if (td->o.gtod_cpu) {
 238                 log_err("fio: platform must support CPU affinity for"
 239                         "gettimeofday() offloading\n");
 240                 return 1;
 241         }
 242 #endif
 243
 244         if (read_only && td_write(td)) {
 245                 log_err("fio: job <%s> has write bit set, but fio is in"
 246                         " read-only mode\n", td->o.name);
 247                 return 1;
 248         }
 249
 250         if (o->write_iolog_file && o->read_iolog_file) {
 251                 log_err("fio: read iolog overrides write_iolog\n");
 252                 free(o->write_iolog_file);
 253                 o->write_iolog_file = NULL;
 254         }
 255
 256         /*
 257          * only really works for sequential io for now, and with 1 file
 258          */
 259         if (o->zone_size && td_random(td) && o->open_files == 1)
 260                 o->zone_size = 0;
 261
 262         /*
 263          * Reads can do overwrites, we always need to pre-create the file
 264          */
 265         if (td_read(td) || td_rw(td))
 266                 o->overwrite = 1;
 267
 268         if (!o->min_bs[DDIR_READ])
 269                 o->min_bs[DDIR_READ] = o->bs[DDIR_READ];
 270         if (!o->max_bs[DDIR_READ])
 271                 o->max_bs[DDIR_READ] = o->bs[DDIR_READ];
 272         if (!o->min_bs[DDIR_WRITE])
 273                 o->min_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 274         if (!o->max_bs[DDIR_WRITE])
 275                 o->max_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 276
 277         o->rw_min_bs = min(o->min_bs[DDIR_READ], o->min_bs[DDIR_WRITE]);
 278
 279         /*
 280          * For random IO, allow blockalign offset other than min_bs.
 281          */
 282         if (!o->ba[DDIR_READ] || !td_random(td))
 283                 o->ba[DDIR_READ] = o->min_bs[DDIR_READ];
 284         if (!o->ba[DDIR_WRITE] || !td_random(td))
 285                 o->ba[DDIR_WRITE] = o->min_bs[DDIR_WRITE];
 286
 287         if ((o->ba[DDIR_READ] != o->min_bs[DDIR_READ] ||
 288             o->ba[DDIR_WRITE] != o->min_bs[DDIR_WRITE]) &&
 289             !td->o.norandommap) {
 290                 log_err("fio: Any use of blockalign= turns off randommap\n");
 291                 td->o.norandommap = 1;
 292         }
 293
 294         if (!o->file_size_high)
 295                 o->file_size_high = o->file_size_low;
 296
 297         if (o->norandommap && o->verify != VERIFY_NONE
 298             && !fixed_block_size(o))  {
 299                 log_err("fio: norandommap given for variable block sizes, "
 300                         "verify disabled\n");
 301                 o->verify = VERIFY_NONE;
 302         }
 303         if (o->bs_unaligned && (o->odirect || td->io_ops->flags & FIO_RAWIO))
 304                 log_err("fio: bs_unaligned may not work with raw io\n");
 305
 306         /*
 307          * thinktime_spin must be less than thinktime
 308          */
 309         if (o->thinktime_spin > o->thinktime)
 310                 o->thinktime_spin = o->thinktime;
 311
 312         /*
 313          * The low water mark cannot be bigger than the iodepth
 314          */
 315         if (o->iodepth_low > o->iodepth || !o->iodepth_low) {
 316                 /*
 317                  * syslet work around - if the workload is sequential,
 318                  * we want to let the queue drain all the way down to
 319                  * avoid seeking between async threads
 320                  */
 321                 if (!strcmp(td->io_ops->name, "syslet-rw") && !td_random(td))
 322                         o->iodepth_low = 1;
 323                 else
 324                         o->iodepth_low = o->iodepth;
 325         }
 326
 327         /*
 328          * If batch number isn't set, default to the same as iodepth
 329          */
 330         if (o->iodepth_batch > o->iodepth || !o->iodepth_batch)
 331                 o->iodepth_batch = o->iodepth;
 332
 333         if (o->nr_files > td->files_index)
 334                 o->nr_files = td->files_index;
 335
 336         if (o->open_files > o->nr_files || !o->open_files)
 337                 o->open_files = o->nr_files;
 338
 339         if (((o->rate[0] + o->rate[1]) && (o->rate_iops[0] + o->rate_iops[1]))||
 340             ((o->ratemin[0] + o->ratemin[1]) && (o->rate_iops_min[0] +
 341                 o->rate_iops_min[1]))) {
 342                 log_err("fio: rate and rate_iops are mutually exclusive\n");
 343                 return 1;
 344         }
 345         if ((o->rate[0] < o->ratemin[0]) || (o->rate[1] < o->ratemin[1]) ||
 346             (o->rate_iops[0] < o->rate_iops_min[0]) ||
 347             (o->rate_iops[1] < o->rate_iops_min[1])) {
 348                 log_err("fio: minimum rate exceeds rate\n");
 349                 return 1;
 350         }
 351
 352         if (!o->timeout && o->time_based) {
 353                 log_err("fio: time_based requires a runtime/timeout setting\n");
 354                 o->time_based = 0;
 355         }
 356
 357         if (o->fill_device && !o->size)
 358                 o->size = -1ULL;
 359
 360         if (td_rw(td) && td->o.verify != VERIFY_NONE)
 361                 log_info("fio: mixed read/write workload with verify. May not "
 362                  "work as expected, unless you pre-populated the file\n");
 363
 364         if (td->o.verify != VERIFY_NONE)
 365                 td->o.refill_buffers = 1;
 366
 367         if (td->o.pre_read)
 368                 td->o.invalidate_cache = 0;
 369
 370         if (td->o.mem_align) {
 371                 if (td->o.odirect && !is_power_of_2(td->o.mem_align)) {
 372                         log_err("fio: given IO mem alignment conflicts with"
 373                                         " direct=1. Resetting.\n");
 374                         td->o.mem_align = page_mask;
 375                 }
 376         }
 377
 378         return 0;
 379 }
 380
 381 /*
 382  * This function leaks the buffer
 383  */
 384 static char *to_kmg(unsigned int val)
 385 {
 386         char *buf = malloc(32);
 387         char post[] = { 0, 'K', 'M', 'G', 'P', 'E', 0 };
 388         char *p = post;
 389
 390         do {
 391                 if (val & 1023)
 392                         break;
 393
 394                 val >>= 10;
 395                 p++;
 396         } while (*p);
 397
 398         snprintf(buf, 31, "%u%c", val, *p);
 399         return buf;
 400 }
 401
 402 /* External engines are specified by "external:name.o") */
 403 static const char *get_engine_name(const char *str)
 404 {
 405         char *p = strstr(str, ":");
 406
 407         if (!p)
 408                 return str;
 409
 410         p++;
 411         strip_blank_front(&p);
 412         strip_blank_end(p);
 413         return p;
 414 }
 415
 416 static int exists_and_not_file(const char *filename)
 417 {
 418         struct stat sb;
 419
 420         if (lstat(filename, &sb) == -1)
 421                 return 0;
 422
 423         if (S_ISREG(sb.st_mode))
 424                 return 0;
 425
 426         return 1;
 427 }
 428
 429 void td_fill_rand_seeds(struct thread_data *td)
 430 {
 431         os_random_seed(td->rand_seeds[0], &td->bsrange_state);
 432         os_random_seed(td->rand_seeds[1], &td->verify_state);
 433         os_random_seed(td->rand_seeds[2], &td->rwmix_state);
 434
 435         if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
 436                 os_random_seed(td->rand_seeds[3], &td->next_file_state);
 437
 438         os_random_seed(td->rand_seeds[5], &td->file_size_state);
 439
 440         if (!td_random(td))
 441                 return;
 442
 443         if (td->o.rand_repeatable)
 444                 td->rand_seeds[4] = FIO_RANDSEED * td->thread_number;
 445
 446         os_random_seed(td->rand_seeds[4], &td->random_state);
 447 }
 448
 449 /*
 450  * Initialize the various random states we need (random io, block size ranges,
 451  * read/write mix, etc).
 452  */
 453 static int init_random_state(struct thread_data *td)
 454 {
 455         int fd;
 456
 457         fd = open("/dev/urandom", O_RDONLY);
 458         if (fd == -1) {
 459                 td_verror(td, errno, "open");
 460                 return 1;
 461         }
 462
 463         if (read(fd, td->rand_seeds, sizeof(td->rand_seeds)) <
 464             (int) sizeof(td->rand_seeds)) {
 465                 td_verror(td, EIO, "read");
 466                 close(fd);
 467                 return 1;
 468         }
 469
 470         close(fd);
 471         td_fill_rand_seeds(td);
 472         return 0;
 473 }
 474
 475 /*
 476  * Adds a job to the list of things todo. Sanitizes the various options
 477  * to make sure we don't have conflicts, and initializes various
 478  * members of td.
 479  */
 480 static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
 481 {
 482         const char *ddir_str[] = { NULL, "read", "write", "rw", NULL,
 483                                    "randread", "randwrite", "randrw" };
 484         unsigned int i;
 485         const char *engine;
 486         char fname[PATH_MAX];
 487         int numjobs, file_alloced;
 488
 489         /*
 490          * the def_thread is just for options, it's not a real job
 491          */
 492         if (td == &def_thread)
 493                 return 0;
 494
 495         /*
 496          * if we are just dumping the output command line, don't add the job
 497          */
 498         if (dump_cmdline) {
 499                 put_job(td);
 500                 return 0;
 501         }
 502
 503         engine = get_engine_name(td->o.ioengine);
 504         td->io_ops = load_ioengine(td, engine);
 505         if (!td->io_ops) {
 506                 log_err("fio: failed to load engine %s\n", engine);
 507                 goto err;
 508         }
 509
 510         if (td->o.use_thread)
 511                 nr_thread++;
 512         else
 513                 nr_process++;
 514
 515         if (td->o.odirect)
 516                 td->io_ops->flags |= FIO_RAWIO;
 517
 518         file_alloced = 0;
 519         if (!td->o.filename && !td->files_index && !td->o.read_iolog_file) {
 520                 file_alloced = 1;
 521
 522                 if (td->o.nr_files == 1 && exists_and_not_file(jobname))
 523                         add_file(td, jobname);
 524                 else {
 525                         for (i = 0; i < td->o.nr_files; i++) {
 526                                 sprintf(fname, "%s.%d.%d", jobname,
 527                                                         td->thread_number, i);
 528                                 add_file(td, fname);
 529                         }
 530                 }
 531         }
 532
 533         if (fixup_options(td))
 534                 goto err;
 535
 536         if (td->io_ops->flags & FIO_DISKLESSIO) {
 537                 struct fio_file *f;
 538
 539                 for_each_file(td, f, i)
 540                         f->real_file_size = -1ULL;
 541         }
 542
 543         td->mutex = fio_mutex_init(0);
 544
 545         td->ts.clat_stat[0].min_val = td->ts.clat_stat[1].min_val = ULONG_MAX;
 546         td->ts.slat_stat[0].min_val = td->ts.slat_stat[1].min_val = ULONG_MAX;
 547         td->ts.bw_stat[0].min_val = td->ts.bw_stat[1].min_val = ULONG_MAX;
 548         td->ddir_nr = td->o.ddir_nr;
 549
 550         if ((td->o.stonewall || td->o.numjobs > 1 || td->o.new_group)
 551              && prev_group_jobs) {
 552                 prev_group_jobs = 0;
 553                 groupid++;
 554         }
 555
 556         td->groupid = groupid;
 557         prev_group_jobs++;
 558
 559         if (init_random_state(td))
 560                 goto err;
 561
 562         if (setup_rate(td))
 563                 goto err;
 564
 565         if (td->o.write_lat_log) {
 566                 setup_log(&td->ts.slat_log);
 567                 setup_log(&td->ts.clat_log);
 568         }
 569         if (td->o.write_bw_log)
 570                 setup_log(&td->ts.bw_log);
 571
 572         if (!td->o.name)
 573                 td->o.name = strdup(jobname);
 574
 575         if (!terse_output) {
 576                 if (!job_add_num) {
 577                         if (!strcmp(td->io_ops->name, "cpuio")) {
 578                                 log_info("%s: ioengine=cpu, cpuload=%u,"
 579                                          " cpucycle=%u\n", td->o.name,
 580                                                         td->o.cpuload,
 581                                                         td->o.cpucycle);
 582                         } else {
 583                                 char *c1, *c2, *c3, *c4;
 584
 585                                 c1 = to_kmg(td->o.min_bs[DDIR_READ]);
 586                                 c2 = to_kmg(td->o.max_bs[DDIR_READ]);
 587                                 c3 = to_kmg(td->o.min_bs[DDIR_WRITE]);
 588                                 c4 = to_kmg(td->o.max_bs[DDIR_WRITE]);
 589
 590                                 log_info("%s: (g=%d): rw=%s, bs=%s-%s/%s-%s,"
 591                                          " ioengine=%s, iodepth=%u\n",
 592                                                 td->o.name, td->groupid,
 593                                                 ddir_str[td->o.td_ddir],
 594                                                 c1, c2, c3, c4,
 595                                                 td->io_ops->name,
 596                                                 td->o.iodepth);
 597
 598                                 free(c1);
 599                                 free(c2);
 600                                 free(c3);
 601                                 free(c4);
 602                         }
 603                 } else if (job_add_num == 1)
 604                         log_info("...\n");
 605         }
 606
 607         /*
 608          * recurse add identical jobs, clear numjobs and stonewall options
 609          * as they don't apply to sub-jobs
 610          */
 611         numjobs = td->o.numjobs;
 612         while (--numjobs) {
 613                 struct thread_data *td_new = get_new_job(0, td);
 614
 615                 if (!td_new)
 616                         goto err;
 617
 618                 td_new->o.numjobs = 1;
 619                 td_new->o.stonewall = 0;
 620                 td_new->o.new_group = 0;
 621
 622                 if (file_alloced) {
 623                         td_new->o.filename = NULL;
 624                         td_new->files_index = 0;
 625                         td_new->files_size = 0;
 626                         td_new->files = NULL;
 627                 }
 628
 629                 job_add_num = numjobs - 1;
 630
 631                 if (add_job(td_new, jobname, job_add_num))
 632                         goto err;
 633         }
 634
 635         return 0;
 636 err:
 637         put_job(td);
 638         return -1;
 639 }
 640
 641 static int skip_this_section(const char *name)
 642 {
 643         if (!job_section)
 644                 return 0;
 645         if (!strncmp(name, "global", 6))
 646                 return 0;
 647
 648         return strcmp(job_section, name);
 649 }
 650
 651 static int is_empty_or_comment(char *line)
 652 {
 653         unsigned int i;
 654
 655         for (i = 0; i < strlen(line); i++) {
 656                 if (line[i] == ';')
 657                         return 1;
 658                 if (line[i] == '#')
 659                         return 1;
 660                 if (!isspace(line[i]) && !iscntrl(line[i]))
 661                         return 0;
 662         }
 663
 664         return 1;
 665 }
 666
 667 /*
 668  * This is our [ini] type file parser.
 669  */
 670 static int parse_jobs_ini(char *file, int stonewall_flag)
 671 {
 672         unsigned int global;
 673         struct thread_data *td;
 674         char *string, *name;
 675         FILE *f;
 676         char *p;
 677         int ret = 0, stonewall;
 678         int first_sect = 1;
 679         int skip_fgets = 0;
 680         int inside_skip = 0;
 681         char **opts;
 682         int i, alloc_opts, num_opts;
 683
 684         if (!strcmp(file, "-"))
 685                 f = stdin;
 686         else
 687                 f = fopen(file, "r");
 688
 689         if (!f) {
 690                 perror("fopen job file");
 691                 return 1;
 692         }
 693
 694         string = malloc(4096);
 695
 696         /*
 697          * it's really 256 + small bit, 280 should suffice
 698          */
 699         name = malloc(280);
 700         memset(name, 0, 280);
 701
 702         alloc_opts = 8;
 703         opts = malloc(sizeof(char *) * alloc_opts);
 704         num_opts = 0;
 705
 706         stonewall = stonewall_flag;
 707         do {
 708                 /*
 709                  * if skip_fgets is set, we already have loaded a line we
 710                  * haven't handled.
 711                  */
 712                 if (!skip_fgets) {
 713                         p = fgets(string, 4095, f);
 714                         if (!p)
 715                                 break;
 716                 }
 717
 718                 skip_fgets = 0;
 719                 strip_blank_front(&p);
 720                 strip_blank_end(p);
 721
 722                 if (is_empty_or_comment(p))
 723                         continue;
 724                 if (sscanf(p, "[%255s]", name) != 1) {
 725                         if (inside_skip)
 726                                 continue;
 727                         log_err("fio: option <%s> outside of [] job section\n",
 728                                                                         p);
 729                         break;
 730                 }
 731
 732                 if (skip_this_section(name)) {
 733                         inside_skip = 1;
 734                         continue;
 735                 } else
 736                         inside_skip = 0;
 737
 738                 global = !strncmp(name, "global", 6);
 739
 740                 name[strlen(name) - 1] = '\0';
 741
 742                 if (dump_cmdline) {
 743                         if (first_sect)
 744                                 log_info("fio ");
 745                         if (!global)
 746                                 log_info("--name=%s ", name);
 747                         first_sect = 0;
 748                 }
 749
 750                 td = get_new_job(global, &def_thread);
 751                 if (!td) {
 752                         ret = 1;
 753                         break;
 754                 }
 755
 756                 /*
 757                  * Seperate multiple job files by a stonewall
 758                  */
 759                 if (!global && stonewall) {
 760                         td->o.stonewall = stonewall;
 761                         stonewall = 0;
 762                 }
 763
 764                 num_opts = 0;
 765                 memset(opts, 0, alloc_opts * sizeof(char *));
 766
 767                 while ((p = fgets(string, 4096, f)) != NULL) {
 768                         if (is_empty_or_comment(p))
 769                                 continue;
 770
 771                         strip_blank_front(&p);
 772
 773                         /*
 774                          * new section, break out and make sure we don't
 775                          * fgets() a new line at the top.
 776                          */
 777                         if (p[0] == '[') {
 778                                 skip_fgets = 1;
 779                                 break;
 780                         }
 781
 782                         strip_blank_end(p);
 783
 784                         if (num_opts == alloc_opts) {
 785                                 alloc_opts <<= 1;
 786                                 opts = realloc(opts,
 787                                                 alloc_opts * sizeof(char *));
 788                         }
 789
 790                         opts[num_opts] = strdup(p);
 791                         num_opts++;
 792                 }
 793
 794                 ret = fio_options_parse(td, opts, num_opts);
 795                 if (!ret) {
 796                         if (dump_cmdline)
 797                                 for (i = 0; i < num_opts; i++)
 798                                         log_info("--%s ", opts[i]);
 799
 800                         ret = add_job(td, name, 0);
 801                 } else {
 802                         log_err("fio: job %s dropped\n", name);
 803                         put_job(td);
 804                 }
 805
 806                 for (i = 0; i < num_opts; i++)
 807                         free(opts[i]);
 808                 num_opts = 0;
 809         } while (!ret);
 810
 811         if (dump_cmdline)
 812                 log_info("\n");
 813
 814         for (i = 0; i < num_opts; i++)
 815                 free(opts[i]);
 816
 817         free(string);
 818         free(name);
 819         free(opts);
 820         if (f != stdin)
 821                 fclose(f);
 822         return ret;
 823 }
 824
 825 static int fill_def_thread(void)
 826 {
 827         memset(&def_thread, 0, sizeof(def_thread));
 828
 829         fio_getaffinity(getpid(), &def_thread.o.cpumask);
 830
 831         /*
 832          * fill default options
 833          */
 834         fio_fill_default_options(&def_thread);
 835
 836         def_thread.o.timeout = def_timeout;
 837         def_thread.o.write_bw_log = write_bw_log;
 838         def_thread.o.write_lat_log = write_lat_log;
 839
 840         return 0;
 841 }
 842
 843 static void free_shm(void)
 844 {
 845         struct shmid_ds sbuf;
 846
 847         if (threads) {
 848                 void *tp = threads;
 849
 850                 threads = NULL;
 851                 file_hash_exit();
 852                 fio_debug_jobp = NULL;
 853                 shmdt(tp);
 854                 shmctl(shm_id, IPC_RMID, &sbuf);
 855         }
 856
 857         scleanup();
 858 }
 859
 860 /*
 861  * The thread area is shared between the main process and the job
 862  * threads/processes. So setup a shared memory segment that will hold
 863  * all the job info. We use the end of the region for keeping track of
 864  * open files across jobs, for file sharing.
 865  */
 866 static int setup_thread_area(void)
 867 {
 868         void *hash;
 869
 870         /*
 871          * 1024 is too much on some machines, scale max_jobs if
 872          * we get a failure that looks like too large a shm segment
 873          */
 874         do {
 875                 size_t size = max_jobs * sizeof(struct thread_data);
 876
 877                 size += file_hash_size;
 878                 size += sizeof(unsigned int);
 879
 880                 shm_id = shmget(0, size, IPC_CREAT | 0600);
 881                 if (shm_id != -1)
 882                         break;
 883                 if (errno != EINVAL) {
 884                         perror("shmget");
 885                         break;
 886                 }
 887
 888                 max_jobs >>= 1;
 889         } while (max_jobs);
 890
 891         if (shm_id == -1)
 892                 return 1;
 893
 894         threads = shmat(shm_id, NULL, 0);
 895         if (threads == (void *) -1) {
 896                 perror("shmat");
 897                 return 1;
 898         }
 899
 900         memset(threads, 0, max_jobs * sizeof(struct thread_data));
 901         hash = (void *) threads + max_jobs * sizeof(struct thread_data);
 902         fio_debug_jobp = (void *) hash + file_hash_size;
 903         *fio_debug_jobp = -1;
 904         file_hash_init(hash);
 905         atexit(free_shm);
 906         return 0;
 907 }
 908
 909 static void usage(const char *name)
 910 {
 911         printf("%s\n", fio_version_string);
 912         printf("%s [options] [job options] <job file(s)>\n", name);
 913         printf("\t--debug=options\tEnable debug logging\n");
 914         printf("\t--output\tWrite output to file\n");
 915         printf("\t--timeout\tRuntime in seconds\n");
 916         printf("\t--latency-log\tGenerate per-job latency logs\n");
 917         printf("\t--bandwidth-log\tGenerate per-job bandwidth logs\n");
 918         printf("\t--minimal\tMinimal (terse) output\n");
 919         printf("\t--version\tPrint version info and exit\n");
 920         printf("\t--help\t\tPrint this page\n");
 921         printf("\t--cmdhelp=cmd\tPrint command help, \"all\" for all of"
 922                 " them\n");
 923         printf("\t--showcmd\tTurn a job file into command line options\n");
 924         printf("\t--eta=when\tWhen ETA estimate should be printed\n");
 925         printf("\t          \tMay be \"always\", \"never\" or \"auto\"\n");
 926         printf("\t--readonly\tTurn on safety read-only checks, preventing"
 927                 " writes\n");
 928         printf("\t--section=name\tOnly run specified section in job file\n");
 929         printf("\t--alloc-size=kb\tSet smalloc pool to this size in kb"
 930                 " (def 1024)\n");
 931         printf("\nFio was written by Jens Axboe <jens.axboe@oracle.com>\n");
 932 }
 933
 934 #ifdef FIO_INC_DEBUG
 935 struct debug_level debug_levels[] = {
 936         { .name = "process",    .shift = FD_PROCESS, },
 937         { .name = "file",       .shift = FD_FILE, },
 938         { .name = "io",         .shift = FD_IO, },
 939         { .name = "mem",        .shift = FD_MEM, },
 940         { .name = "blktrace",   .shift = FD_BLKTRACE },
 941         { .name = "verify",     .shift = FD_VERIFY },
 942         { .name = "random",     .shift = FD_RANDOM },
 943         { .name = "parse",      .shift = FD_PARSE },
 944         { .name = "diskutil",   .shift = FD_DISKUTIL },
 945         { .name = "job",        .shift = FD_JOB },
 946         { .name = "mutex",      .shift = FD_MUTEX },
 947         { .name = NULL, },
 948 };
 949
 950 static int set_debug(const char *string)
 951 {
 952         struct debug_level *dl;
 953         char *p = (char *) string;
 954         char *opt;
 955         int i;
 956
 957         if (!strcmp(string, "?") || !strcmp(string, "help")) {
 958                 int i;
 959
 960                 log_info("fio: dumping debug options:");
 961                 for (i = 0; debug_levels[i].name; i++) {
 962                         dl = &debug_levels[i];
 963                         log_info("%s,", dl->name);
 964                 }
 965                 log_info("all\n");
 966                 return 1;
 967         }
 968
 969         while ((opt = strsep(&p, ",")) != NULL) {
 970                 int found = 0;
 971
 972                 if (!strncmp(opt, "all", 3)) {
 973                         log_info("fio: set all debug options\n");
 974                         fio_debug = ~0UL;
 975                         continue;
 976                 }
 977
 978                 for (i = 0; debug_levels[i].name; i++) {
 979                         dl = &debug_levels[i];
 980                         found = !strncmp(opt, dl->name, strlen(dl->name));
 981                         if (!found)
 982                                 continue;
 983
 984                         if (dl->shift == FD_JOB) {
 985                                 opt = strchr(opt, ':');
 986                                 if (!opt) {
 987                                         log_err("fio: missing job number\n");
 988                                         break;
 989                                 }
 990                                 opt++;
 991                                 fio_debug_jobno = atoi(opt);
 992                                 log_info("fio: set debug jobno %d\n",
 993                                                         fio_debug_jobno);
 994                         } else {
 995                                 log_info("fio: set debug option %s\n", opt);
 996                                 fio_debug |= (1UL << dl->shift);
 997                         }
 998                         break;
 999                 }
1000
1001                 if (!found)
1002                         log_err("fio: debug mask %s not found\n", opt);
1003         }
1004         return 0;
1005 }
1006 #else
1007 static int set_debug(const char *string)
1008 {
1009         log_err("fio: debug tracing not included in build\n");
1010         return 1;
1011 }
1012 #endif
1013
1014 static int parse_cmd_line(int argc, char *argv[])
1015 {
1016         struct thread_data *td = NULL;
1017         int c, ini_idx = 0, lidx, ret = 0, do_exit = 0, exit_val = 0;
1018
1019         while ((c = getopt_long_only(argc, argv, "", l_opts, &lidx)) != -1) {
1020                 switch (c) {
1021                 case 'a':
1022                         smalloc_pool_size = atoi(optarg);
1023                         break;
1024                 case 't':
1025                         def_timeout = atoi(optarg);
1026                         break;
1027                 case 'l':
1028                         write_lat_log = 1;
1029                         break;
1030                 case 'w':
1031                         write_bw_log = 1;
1032                         break;
1033                 case 'o':
1034                         f_out = fopen(optarg, "w+");
1035                         if (!f_out) {
1036                                 perror("fopen output");
1037                                 exit(1);
1038                         }
1039                         f_err = f_out;
1040                         break;
1041                 case 'm':
1042                         terse_output = 1;
1043                         break;
1044                 case 'h':
1045                         usage(argv[0]);
1046                         exit(0);
1047                 case 'c':
1048                         exit(fio_show_option_help(optarg));
1049                 case 's':
1050                         dump_cmdline = 1;
1051                         break;
1052                 case 'r':
1053                         read_only = 1;
1054                         break;
1055                 case 'v':
1056                         printf("%s\n", fio_version_string);
1057                         exit(0);
1058                 case 'e':
1059                         if (!strcmp("always", optarg))
1060                                 eta_print = FIO_ETA_ALWAYS;
1061                         else if (!strcmp("never", optarg))
1062                                 eta_print = FIO_ETA_NEVER;
1063                         break;
1064                 case 'd':
1065                         if (set_debug(optarg))
1066                                 do_exit++;
1067                         break;
1068                 case 'x':
1069                         if (!strcmp(optarg, "global")) {
1070                                 log_err("fio: can't use global as only "
1071                                         "section\n");
1072                                 do_exit++;
1073                                 exit_val = 1;
1074                                 break;
1075                         }
1076                         if (job_section)
1077                                 free(job_section);
1078                         job_section = strdup(optarg);
1079                         break;
1080                 case FIO_GETOPT_JOB: {
1081                         const char *opt = l_opts[lidx].name;
1082                         char *val = optarg;
1083
1084                         if (!strncmp(opt, "name", 4) && td) {
1085                                 ret = add_job(td, td->o.name ?: "fio", 0);
1086                                 if (ret) {
1087                                         put_job(td);
1088                                         return 0;
1089                                 }
1090                                 td = NULL;
1091                         }
1092                         if (!td) {
1093                                 int is_section = !strncmp(opt, "name", 4);
1094                                 int global = 0;
1095
1096                                 if (!is_section || !strncmp(val, "global", 6))
1097                                         global = 1;
1098
1099                                 if (is_section && skip_this_section(val))
1100                                         continue;
1101
1102                                 td = get_new_job(global, &def_thread);
1103                                 if (!td)
1104                                         return 0;
1105                         }
1106
1107                         ret = fio_cmd_option_parse(td, opt, val);
1108                         break;
1109                 }
1110                 default:
1111                         do_exit++;
1112                         exit_val = 1;
1113                         break;
1114                 }
1115         }
1116
1117         if (do_exit)
1118                 exit(exit_val);
1119
1120         if (td) {
1121                 if (!ret)
1122                         ret = add_job(td, td->o.name ?: "fio", 0);
1123                 if (ret)
1124                         put_job(td);
1125         }
1126
1127         while (optind < argc) {
1128                 ini_idx++;
1129                 ini_file = realloc(ini_file, ini_idx * sizeof(char *));
1130                 ini_file[ini_idx - 1] = strdup(argv[optind]);
1131                 optind++;
1132         }
1133
1134         return ini_idx;
1135 }
1136
1137 int parse_options(int argc, char *argv[])
1138 {
1139         int job_files, i;
1140
1141         f_out = stdout;
1142         f_err = stderr;
1143
1144         fio_options_dup_and_init(l_opts);
1145
1146         if (setup_thread_area())
1147                 return 1;
1148         if (fill_def_thread())
1149                 return 1;
1150
1151         job_files = parse_cmd_line(argc, argv);
1152
1153         for (i = 0; i < job_files; i++) {
1154                 if (fill_def_thread())
1155                         return 1;
1156                 if (parse_jobs_ini(ini_file[i], i))
1157                         return 1;
1158                 free(ini_file[i]);
1159         }
1160
1161         free(ini_file);
1162         options_mem_free(&def_thread);
1163
1164         if (!thread_number) {
1165                 if (dump_cmdline)
1166                         return 0;
1167
1168                 log_err("No jobs defined(s)\n\n");
1169                 usage(argv[0]);
1170                 return 1;
1171         }
1172
1173         if (def_thread.o.gtod_offload) {
1174                 fio_gtod_init();
1175                 fio_gtod_offload = 1;
1176                 fio_gtod_cpu = def_thread.o.gtod_cpu;
1177         }
1178
1179         return 0;
1180 }