init.c

   1 /*
   2  * This file contains job initialization and setup functions.
   3  */
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <unistd.h>
   7 #include <fcntl.h>
   8 #include <ctype.h>
   9 #include <string.h>
  10 #include <errno.h>
  11 #include <sys/ipc.h>
  12 #include <sys/shm.h>
  13 #include <sys/types.h>
  14 #include <sys/stat.h>
  15
  16 #include "fio.h"
  17 #include "parse.h"
  18 #include "smalloc.h"
  19 #include "filehash.h"
  20 #include "verify.h"
  21 #include "profile.h"
  22
  23 #include "lib/getopt.h"
  24
  25 static char fio_version_string[] = "fio 1.56";
  26
  27 #define FIO_RANDSEED            (0xb1899bedUL)
  28
  29 static char **ini_file;
  30 static int max_jobs = FIO_MAX_JOBS;
  31 static int dump_cmdline;
  32
  33 static struct thread_data def_thread;
  34 struct thread_data *threads = NULL;
  35
  36 int exitall_on_terminate = 0;
  37 int terse_output = 0;
  38 int eta_print;
  39 unsigned long long mlock_size = 0;
  40 FILE *f_out = NULL;
  41 FILE *f_err = NULL;
  42 char **job_sections = NULL;
  43 int nr_job_sections = 0;
  44 char *exec_profile = NULL;
  45 int warnings_fatal = 0;
  46
  47 int write_bw_log = 0;
  48 int read_only = 0;
  49
  50 static int def_timeout;
  51 static int write_lat_log;
  52
  53 static int prev_group_jobs;
  54
  55 unsigned long fio_debug = 0;
  56 unsigned int fio_debug_jobno = -1;
  57 unsigned int *fio_debug_jobp = NULL;
  58
  59 static char cmd_optstr[256];
  60
  61 /*
  62  * Command line options. These will contain the above, plus a few
  63  * extra that only pertain to fio itself and not jobs.
  64  */
  65 static struct option l_opts[FIO_NR_OPTIONS] = {
  66         {
  67                 .name           = (char *) "output",
  68                 .has_arg        = required_argument,
  69                 .val            = 'o',
  70         },
  71         {
  72                 .name           = (char *) "timeout",
  73                 .has_arg        = required_argument,
  74                 .val            = 't',
  75         },
  76         {
  77                 .name           = (char *) "latency-log",
  78                 .has_arg        = required_argument,
  79                 .val            = 'l',
  80         },
  81         {
  82                 .name           = (char *) "bandwidth-log",
  83                 .has_arg        = required_argument,
  84                 .val            = 'b',
  85         },
  86         {
  87                 .name           = (char *) "minimal",
  88                 .has_arg        = optional_argument,
  89                 .val            = 'm',
  90         },
  91         {
  92                 .name           = (char *) "version",
  93                 .has_arg        = no_argument,
  94                 .val            = 'v',
  95         },
  96         {
  97                 .name           = (char *) "help",
  98                 .has_arg        = no_argument,
  99                 .val            = 'h',
 100         },
 101         {
 102                 .name           = (char *) "cmdhelp",
 103                 .has_arg        = optional_argument,
 104                 .val            = 'c',
 105         },
 106         {
 107                 .name           = (char *) "showcmd",
 108                 .has_arg        = no_argument,
 109                 .val            = 's',
 110         },
 111         {
 112                 .name           = (char *) "readonly",
 113                 .has_arg        = no_argument,
 114                 .val            = 'r',
 115         },
 116         {
 117                 .name           = (char *) "eta",
 118                 .has_arg        = required_argument,
 119                 .val            = 'e',
 120         },
 121         {
 122                 .name           = (char *) "debug",
 123                 .has_arg        = required_argument,
 124                 .val            = 'd',
 125         },
 126         {
 127                 .name           = (char *) "section",
 128                 .has_arg        = required_argument,
 129                 .val            = 'x',
 130         },
 131         {
 132                 .name           = (char *) "alloc-size",
 133                 .has_arg        = required_argument,
 134                 .val            = 'a',
 135         },
 136         {
 137                 .name           = (char *) "profile",
 138                 .has_arg        = required_argument,
 139                 .val            = 'p',
 140         },
 141         {
 142                 .name           = (char *) "warnings-fatal",
 143                 .has_arg        = no_argument,
 144                 .val            = 'w',
 145         },
 146         {
 147                 .name           = (char *) "max-jobs",
 148                 .has_arg        = required_argument,
 149                 .val            = 'j',
 150         },
 151         {
 152                 .name           = NULL,
 153         },
 154 };
 155
 156 FILE *get_f_out()
 157 {
 158         return f_out;
 159 }
 160
 161 FILE *get_f_err()
 162 {
 163         return f_err;
 164 }
 165
 166 /*
 167  * Return a free job structure.
 168  */
 169 static struct thread_data *get_new_job(int global, struct thread_data *parent)
 170 {
 171         struct thread_data *td;
 172
 173         if (global)
 174                 return &def_thread;
 175         if (thread_number >= max_jobs) {
 176                 log_err("error: maximum number of jobs (%d) reached.\n",
 177                                 max_jobs);
 178                 return NULL;
 179         }
 180
 181         td = &threads[thread_number++];
 182         *td = *parent;
 183
 184         td->o.uid = td->o.gid = -1U;
 185
 186         dup_files(td, parent);
 187         options_mem_dupe(td);
 188
 189         profile_add_hooks(td);
 190
 191         td->thread_number = thread_number;
 192         return td;
 193 }
 194
 195 static void put_job(struct thread_data *td)
 196 {
 197         if (td == &def_thread)
 198                 return;
 199
 200         profile_td_exit(td);
 201
 202         if (td->error)
 203                 log_info("fio: %s\n", td->verror);
 204
 205         memset(&threads[td->thread_number - 1], 0, sizeof(*td));
 206         thread_number--;
 207 }
 208
 209 static int __setup_rate(struct thread_data *td, enum fio_ddir ddir)
 210 {
 211         unsigned int bs = td->o.min_bs[ddir];
 212         unsigned long long bytes_per_sec;
 213
 214         assert(ddir_rw(ddir));
 215
 216         if (td->o.rate[ddir])
 217                 bytes_per_sec = td->o.rate[ddir];
 218         else
 219                 bytes_per_sec = td->o.rate_iops[ddir] * bs;
 220
 221         if (!bytes_per_sec) {
 222                 log_err("rate lower than supported\n");
 223                 return -1;
 224         }
 225
 226         td->rate_nsec_cycle[ddir] = 1000000000ULL / bytes_per_sec;
 227         td->rate_pending_usleep[ddir] = 0;
 228         return 0;
 229 }
 230
 231 static int setup_rate(struct thread_data *td)
 232 {
 233         int ret = 0;
 234
 235         if (td->o.rate[DDIR_READ] || td->o.rate_iops[DDIR_READ])
 236                 ret = __setup_rate(td, DDIR_READ);
 237         if (td->o.rate[DDIR_WRITE] || td->o.rate_iops[DDIR_WRITE])
 238                 ret |= __setup_rate(td, DDIR_WRITE);
 239
 240         return ret;
 241 }
 242
 243 static int fixed_block_size(struct thread_options *o)
 244 {
 245         return o->min_bs[DDIR_READ] == o->max_bs[DDIR_READ] &&
 246                 o->min_bs[DDIR_WRITE] == o->max_bs[DDIR_WRITE] &&
 247                 o->min_bs[DDIR_READ] == o->min_bs[DDIR_WRITE];
 248 }
 249
 250 /*
 251  * Lazy way of fixing up options that depend on each other. We could also
 252  * define option callback handlers, but this is easier.
 253  */
 254 static int fixup_options(struct thread_data *td)
 255 {
 256         struct thread_options *o = &td->o;
 257         int ret = 0;
 258
 259 #ifndef FIO_HAVE_PSHARED_MUTEX
 260         if (!o->use_thread) {
 261                 log_info("fio: this platform does not support process shared"
 262                          " mutexes, forcing use of threads. Use the 'thread'"
 263                          " option to get rid of this warning.\n");
 264                 o->use_thread = 1;
 265                 ret = warnings_fatal;
 266         }
 267 #endif
 268
 269         if (o->write_iolog_file && o->read_iolog_file) {
 270                 log_err("fio: read iolog overrides write_iolog\n");
 271                 free(o->write_iolog_file);
 272                 o->write_iolog_file = NULL;
 273                 ret = warnings_fatal;
 274         }
 275
 276         /*
 277          * only really works for sequential io for now, and with 1 file
 278          */
 279         if (o->zone_size && td_random(td) && o->open_files == 1)
 280                 o->zone_size = 0;
 281
 282         /*
 283          * Reads can do overwrites, we always need to pre-create the file
 284          */
 285         if (td_read(td) || td_rw(td))
 286                 o->overwrite = 1;
 287
 288         if (!o->min_bs[DDIR_READ])
 289                 o->min_bs[DDIR_READ] = o->bs[DDIR_READ];
 290         if (!o->max_bs[DDIR_READ])
 291                 o->max_bs[DDIR_READ] = o->bs[DDIR_READ];
 292         if (!o->min_bs[DDIR_WRITE])
 293                 o->min_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 294         if (!o->max_bs[DDIR_WRITE])
 295                 o->max_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 296
 297         o->rw_min_bs = min(o->min_bs[DDIR_READ], o->min_bs[DDIR_WRITE]);
 298
 299         /*
 300          * For random IO, allow blockalign offset other than min_bs.
 301          */
 302         if (!o->ba[DDIR_READ] || !td_random(td))
 303                 o->ba[DDIR_READ] = o->min_bs[DDIR_READ];
 304         if (!o->ba[DDIR_WRITE] || !td_random(td))
 305                 o->ba[DDIR_WRITE] = o->min_bs[DDIR_WRITE];
 306
 307         if ((o->ba[DDIR_READ] != o->min_bs[DDIR_READ] ||
 308             o->ba[DDIR_WRITE] != o->min_bs[DDIR_WRITE]) &&
 309             !o->norandommap) {
 310                 log_err("fio: Any use of blockalign= turns off randommap\n");
 311                 o->norandommap = 1;
 312                 ret = warnings_fatal;
 313         }
 314
 315         if (!o->file_size_high)
 316                 o->file_size_high = o->file_size_low;
 317
 318         if (o->norandommap && o->verify != VERIFY_NONE
 319             && !fixed_block_size(o))  {
 320                 log_err("fio: norandommap given for variable block sizes, "
 321                         "verify disabled\n");
 322                 o->verify = VERIFY_NONE;
 323                 ret = warnings_fatal;
 324         }
 325         if (o->bs_unaligned && (o->odirect || td->io_ops->flags & FIO_RAWIO))
 326                 log_err("fio: bs_unaligned may not work with raw io\n");
 327
 328         /*
 329          * thinktime_spin must be less than thinktime
 330          */
 331         if (o->thinktime_spin > o->thinktime)
 332                 o->thinktime_spin = o->thinktime;
 333
 334         /*
 335          * The low water mark cannot be bigger than the iodepth
 336          */
 337         if (o->iodepth_low > o->iodepth || !o->iodepth_low) {
 338                 /*
 339                  * syslet work around - if the workload is sequential,
 340                  * we want to let the queue drain all the way down to
 341                  * avoid seeking between async threads
 342                  */
 343                 if (!strcmp(td->io_ops->name, "syslet-rw") && !td_random(td))
 344                         o->iodepth_low = 1;
 345                 else
 346                         o->iodepth_low = o->iodepth;
 347         }
 348
 349         /*
 350          * If batch number isn't set, default to the same as iodepth
 351          */
 352         if (o->iodepth_batch > o->iodepth || !o->iodepth_batch)
 353                 o->iodepth_batch = o->iodepth;
 354
 355         if (o->nr_files > td->files_index)
 356                 o->nr_files = td->files_index;
 357
 358         if (o->open_files > o->nr_files || !o->open_files)
 359                 o->open_files = o->nr_files;
 360
 361         if (((o->rate[0] + o->rate[1]) && (o->rate_iops[0] + o->rate_iops[1]))||
 362             ((o->ratemin[0] + o->ratemin[1]) && (o->rate_iops_min[0] +
 363                 o->rate_iops_min[1]))) {
 364                 log_err("fio: rate and rate_iops are mutually exclusive\n");
 365                 ret = 1;
 366         }
 367         if ((o->rate[0] < o->ratemin[0]) || (o->rate[1] < o->ratemin[1]) ||
 368             (o->rate_iops[0] < o->rate_iops_min[0]) ||
 369             (o->rate_iops[1] < o->rate_iops_min[1])) {
 370                 log_err("fio: minimum rate exceeds rate\n");
 371                 ret = 1;
 372         }
 373
 374         if (!o->timeout && o->time_based) {
 375                 log_err("fio: time_based requires a runtime/timeout setting\n");
 376                 o->time_based = 0;
 377                 ret = warnings_fatal;
 378         }
 379
 380         if (o->fill_device && !o->size)
 381                 o->size = -1ULL;
 382
 383         if (o->verify != VERIFY_NONE) {
 384                 if (td_write(td) && o->do_verify && o->numjobs > 1) {
 385                         log_info("Multiple writers may overwrite blocks that "
 386                                 "belong to other jobs. This can cause "
 387                                 "verification failures.\n");
 388                         ret = warnings_fatal;
 389                 }
 390
 391                 o->refill_buffers = 1;
 392                 if (o->max_bs[DDIR_WRITE] != o->min_bs[DDIR_WRITE] &&
 393                     !o->verify_interval)
 394                         o->verify_interval = o->min_bs[DDIR_WRITE];
 395         }
 396
 397         if (o->pre_read) {
 398                 o->invalidate_cache = 0;
 399                 if (td->io_ops->flags & FIO_PIPEIO) {
 400                         log_info("fio: cannot pre-read files with an IO engine"
 401                                  " that isn't seekable. Pre-read disabled.\n");
 402                         ret = warnings_fatal;
 403                 }
 404         }
 405
 406 #ifndef FIO_HAVE_FDATASYNC
 407         if (o->fdatasync_blocks) {
 408                 log_info("fio: this platform does not support fdatasync()"
 409                          " falling back to using fsync().  Use the 'fsync'"
 410                          " option instead of 'fdatasync' to get rid of"
 411                          " this warning\n");
 412                 o->fsync_blocks = o->fdatasync_blocks;
 413                 o->fdatasync_blocks = 0;
 414                 ret = warnings_fatal;
 415         }
 416 #endif
 417
 418         return ret;
 419 }
 420
 421 /*
 422  * This function leaks the buffer
 423  */
 424 static char *to_kmg(unsigned int val)
 425 {
 426         char *buf = malloc(32);
 427         char post[] = { 0, 'K', 'M', 'G', 'P', 'E', 0 };
 428         char *p = post;
 429
 430         do {
 431                 if (val & 1023)
 432                         break;
 433
 434                 val >>= 10;
 435                 p++;
 436         } while (*p);
 437
 438         snprintf(buf, 31, "%u%c", val, *p);
 439         return buf;
 440 }
 441
 442 /* External engines are specified by "external:name.o") */
 443 static const char *get_engine_name(const char *str)
 444 {
 445         char *p = strstr(str, ":");
 446
 447         if (!p)
 448                 return str;
 449
 450         p++;
 451         strip_blank_front(&p);
 452         strip_blank_end(p);
 453         return p;
 454 }
 455
 456 static int exists_and_not_file(const char *filename)
 457 {
 458         struct stat sb;
 459
 460         if (lstat(filename, &sb) == -1)
 461                 return 0;
 462
 463         /* \\.\ is the device namespace in Windows, where every file
 464          * is a device node */
 465         if (S_ISREG(sb.st_mode) && strncmp(filename, "\\\\.\\", 4) != 0)
 466                 return 0;
 467
 468         return 1;
 469 }
 470
 471 static void td_fill_rand_seeds_os(struct thread_data *td)
 472 {
 473         os_random_seed(td->rand_seeds[0], &td->bsrange_state);
 474         os_random_seed(td->rand_seeds[1], &td->verify_state);
 475         os_random_seed(td->rand_seeds[2], &td->rwmix_state);
 476
 477         if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
 478                 os_random_seed(td->rand_seeds[3], &td->next_file_state);
 479
 480         os_random_seed(td->rand_seeds[5], &td->file_size_state);
 481         os_random_seed(td->rand_seeds[6], &td->trim_state);
 482
 483         if (!td_random(td))
 484                 return;
 485
 486         if (td->o.rand_repeatable)
 487                 td->rand_seeds[4] = FIO_RANDSEED * td->thread_number;
 488
 489         os_random_seed(td->rand_seeds[4], &td->random_state);
 490 }
 491
 492 static void td_fill_rand_seeds_internal(struct thread_data *td)
 493 {
 494         init_rand_seed(&td->__bsrange_state, td->rand_seeds[0]);
 495         init_rand_seed(&td->__verify_state, td->rand_seeds[1]);
 496         init_rand_seed(&td->__rwmix_state, td->rand_seeds[2]);
 497
 498         if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
 499                 init_rand_seed(&td->__next_file_state, td->rand_seeds[3]);
 500
 501         init_rand_seed(&td->__file_size_state, td->rand_seeds[5]);
 502         init_rand_seed(&td->__trim_state, td->rand_seeds[6]);
 503
 504         if (!td_random(td))
 505                 return;
 506
 507         if (td->o.rand_repeatable)
 508                 td->rand_seeds[4] = FIO_RANDSEED * td->thread_number;
 509
 510         init_rand_seed(&td->__random_state, td->rand_seeds[4]);
 511 }
 512
 513 void td_fill_rand_seeds(struct thread_data *td)
 514 {
 515         if (td->o.use_os_rand)
 516                 td_fill_rand_seeds_os(td);
 517         else
 518                 td_fill_rand_seeds_internal(td);
 519 }
 520
 521 /*
 522  * Initialize the various random states we need (random io, block size ranges,
 523  * read/write mix, etc).
 524  */
 525 static int init_random_state(struct thread_data *td)
 526 {
 527         int fd;
 528
 529         fd = open("/dev/urandom", O_RDONLY);
 530         if (fd == -1) {
 531                 td_verror(td, errno, "open");
 532                 return 1;
 533         }
 534
 535         if (read(fd, td->rand_seeds, sizeof(td->rand_seeds)) <
 536             (int) sizeof(td->rand_seeds)) {
 537                 td_verror(td, EIO, "read");
 538                 close(fd);
 539                 return 1;
 540         }
 541
 542         close(fd);
 543         td_fill_rand_seeds(td);
 544         return 0;
 545 }
 546
 547 /*
 548  * Adds a job to the list of things todo. Sanitizes the various options
 549  * to make sure we don't have conflicts, and initializes various
 550  * members of td.
 551  */
 552 static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
 553 {
 554         const char *ddir_str[] = { NULL, "read", "write", "rw", NULL,
 555                                    "randread", "randwrite", "randrw" };
 556         unsigned int i;
 557         const char *engine;
 558         char fname[PATH_MAX];
 559         int numjobs, file_alloced;
 560
 561         /*
 562          * the def_thread is just for options, it's not a real job
 563          */
 564         if (td == &def_thread)
 565                 return 0;
 566
 567         /*
 568          * if we are just dumping the output command line, don't add the job
 569          */
 570         if (dump_cmdline) {
 571                 put_job(td);
 572                 return 0;
 573         }
 574
 575         if (profile_td_init(td))
 576                 goto err;
 577
 578         engine = get_engine_name(td->o.ioengine);
 579         td->io_ops = load_ioengine(td, engine);
 580         if (!td->io_ops) {
 581                 log_err("fio: failed to load engine %s\n", engine);
 582                 goto err;
 583         }
 584
 585         if (td->o.use_thread)
 586                 nr_thread++;
 587         else
 588                 nr_process++;
 589
 590         if (td->o.odirect)
 591                 td->io_ops->flags |= FIO_RAWIO;
 592
 593         file_alloced = 0;
 594         if (!td->o.filename && !td->files_index && !td->o.read_iolog_file) {
 595                 file_alloced = 1;
 596
 597                 if (td->o.nr_files == 1 && exists_and_not_file(jobname))
 598                         add_file(td, jobname);
 599                 else {
 600                         for (i = 0; i < td->o.nr_files; i++) {
 601                                 sprintf(fname, "%s.%d.%d", jobname,
 602                                                         td->thread_number, i);
 603                                 add_file(td, fname);
 604                         }
 605                 }
 606         }
 607
 608         if (fixup_options(td))
 609                 goto err;
 610
 611         if (td->io_ops->flags & FIO_DISKLESSIO) {
 612                 struct fio_file *f;
 613
 614                 for_each_file(td, f, i)
 615                         f->real_file_size = -1ULL;
 616         }
 617
 618         td->mutex = fio_mutex_init(0);
 619
 620         td->ts.clat_stat[0].min_val = td->ts.clat_stat[1].min_val = ULONG_MAX;
 621         td->ts.slat_stat[0].min_val = td->ts.slat_stat[1].min_val = ULONG_MAX;
 622         td->ts.lat_stat[0].min_val = td->ts.lat_stat[1].min_val = ULONG_MAX;
 623         td->ts.bw_stat[0].min_val = td->ts.bw_stat[1].min_val = ULONG_MAX;
 624         td->ddir_seq_nr = td->o.ddir_seq_nr;
 625
 626         if ((td->o.stonewall || td->o.new_group) && prev_group_jobs) {
 627                 prev_group_jobs = 0;
 628                 groupid++;
 629         }
 630
 631         td->groupid = groupid;
 632         prev_group_jobs++;
 633
 634         if (init_random_state(td))
 635                 goto err;
 636
 637         if (setup_rate(td))
 638                 goto err;
 639
 640         if (td->o.write_lat_log) {
 641                 setup_log(&td->ts.lat_log);
 642                 setup_log(&td->ts.slat_log);
 643                 setup_log(&td->ts.clat_log);
 644         }
 645         if (td->o.write_bw_log)
 646                 setup_log(&td->ts.bw_log);
 647
 648         if (!td->o.name)
 649                 td->o.name = strdup(jobname);
 650
 651         if (!terse_output) {
 652                 if (!job_add_num) {
 653                         if (!strcmp(td->io_ops->name, "cpuio")) {
 654                                 log_info("%s: ioengine=cpu, cpuload=%u,"
 655                                          " cpucycle=%u\n", td->o.name,
 656                                                         td->o.cpuload,
 657                                                         td->o.cpucycle);
 658                         } else {
 659                                 char *c1, *c2, *c3, *c4;
 660
 661                                 c1 = to_kmg(td->o.min_bs[DDIR_READ]);
 662                                 c2 = to_kmg(td->o.max_bs[DDIR_READ]);
 663                                 c3 = to_kmg(td->o.min_bs[DDIR_WRITE]);
 664                                 c4 = to_kmg(td->o.max_bs[DDIR_WRITE]);
 665
 666                                 log_info("%s: (g=%d): rw=%s, bs=%s-%s/%s-%s,"
 667                                          " ioengine=%s, iodepth=%u\n",
 668                                                 td->o.name, td->groupid,
 669                                                 ddir_str[td->o.td_ddir],
 670                                                 c1, c2, c3, c4,
 671                                                 td->io_ops->name,
 672                                                 td->o.iodepth);
 673
 674                                 free(c1);
 675                                 free(c2);
 676                                 free(c3);
 677                                 free(c4);
 678                         }
 679                 } else if (job_add_num == 1)
 680                         log_info("...\n");
 681         }
 682
 683         /*
 684          * recurse add identical jobs, clear numjobs and stonewall options
 685          * as they don't apply to sub-jobs
 686          */
 687         numjobs = td->o.numjobs;
 688         while (--numjobs) {
 689                 struct thread_data *td_new = get_new_job(0, td);
 690
 691                 if (!td_new)
 692                         goto err;
 693
 694                 td_new->o.numjobs = 1;
 695                 td_new->o.stonewall = 0;
 696                 td_new->o.new_group = 0;
 697
 698                 if (file_alloced) {
 699                         td_new->o.filename = NULL;
 700                         td_new->files_index = 0;
 701                         td_new->files_size = 0;
 702                         td_new->files = NULL;
 703                 }
 704
 705                 job_add_num = numjobs - 1;
 706
 707                 if (add_job(td_new, jobname, job_add_num))
 708                         goto err;
 709         }
 710
 711         return 0;
 712 err:
 713         put_job(td);
 714         return -1;
 715 }
 716
 717 /*
 718  * Parse as if 'o' was a command line
 719  */
 720 void add_job_opts(const char **o)
 721 {
 722         struct thread_data *td, *td_parent;
 723         int i, in_global = 1;
 724         char jobname[32];
 725
 726         i = 0;
 727         td_parent = td = NULL;
 728         while (o[i]) {
 729                 if (!strncmp(o[i], "name", 4)) {
 730                         in_global = 0;
 731                         if (td)
 732                                 add_job(td, jobname, 0);
 733                         td = NULL;
 734                         sprintf(jobname, "%s", o[i] + 5);
 735                 }
 736                 if (in_global && !td_parent)
 737                         td_parent = get_new_job(1, &def_thread);
 738                 else if (!in_global && !td) {
 739                         if (!td_parent)
 740                                 td_parent = &def_thread;
 741                         td = get_new_job(0, td_parent);
 742                 }
 743                 if (in_global)
 744                         fio_options_parse(td_parent, (char **) &o[i], 1);
 745                 else
 746                         fio_options_parse(td, (char **) &o[i], 1);
 747                 i++;
 748         }
 749
 750         if (td)
 751                 add_job(td, jobname, 0);
 752 }
 753
 754 static int skip_this_section(const char *name)
 755 {
 756         int i;
 757
 758         if (!nr_job_sections)
 759                 return 0;
 760         if (!strncmp(name, "global", 6))
 761                 return 0;
 762
 763         for (i = 0; i < nr_job_sections; i++)
 764                 if (!strcmp(job_sections[i], name))
 765                         return 0;
 766
 767         return 1;
 768 }
 769
 770 static int is_empty_or_comment(char *line)
 771 {
 772         unsigned int i;
 773
 774         for (i = 0; i < strlen(line); i++) {
 775                 if (line[i] == ';')
 776                         return 1;
 777                 if (line[i] == '#')
 778                         return 1;
 779                 if (!isspace((int) line[i]) && !iscntrl((int) line[i]))
 780                         return 0;
 781         }
 782
 783         return 1;
 784 }
 785
 786 /*
 787  * This is our [ini] type file parser.
 788  */
 789 static int parse_jobs_ini(char *file, int stonewall_flag)
 790 {
 791         unsigned int global;
 792         struct thread_data *td;
 793         char *string, *name;
 794         FILE *f;
 795         char *p;
 796         int ret = 0, stonewall;
 797         int first_sect = 1;
 798         int skip_fgets = 0;
 799         int inside_skip = 0;
 800         char **opts;
 801         int i, alloc_opts, num_opts;
 802
 803         if (!strcmp(file, "-"))
 804                 f = stdin;
 805         else
 806                 f = fopen(file, "r");
 807
 808         if (!f) {
 809                 perror("fopen job file");
 810                 return 1;
 811         }
 812
 813         string = malloc(4096);
 814
 815         /*
 816          * it's really 256 + small bit, 280 should suffice
 817          */
 818         name = malloc(280);
 819         memset(name, 0, 280);
 820
 821         alloc_opts = 8;
 822         opts = malloc(sizeof(char *) * alloc_opts);
 823         num_opts = 0;
 824
 825         stonewall = stonewall_flag;
 826         do {
 827                 /*
 828                  * if skip_fgets is set, we already have loaded a line we
 829                  * haven't handled.
 830                  */
 831                 if (!skip_fgets) {
 832                         p = fgets(string, 4095, f);
 833                         if (!p)
 834                                 break;
 835                 }
 836
 837                 skip_fgets = 0;
 838                 strip_blank_front(&p);
 839                 strip_blank_end(p);
 840
 841                 if (is_empty_or_comment(p))
 842                         continue;
 843                 if (sscanf(p, "[%255[^\n]]", name) != 1) {
 844                         if (inside_skip)
 845                                 continue;
 846                         log_err("fio: option <%s> outside of [] job section\n",
 847                                                                         p);
 848                         break;
 849                 }
 850
 851                 name[strlen(name) - 1] = '\0';
 852
 853                 if (skip_this_section(name)) {
 854                         inside_skip = 1;
 855                         continue;
 856                 } else
 857                         inside_skip = 0;
 858
 859                 global = !strncmp(name, "global", 6);
 860
 861                 if (dump_cmdline) {
 862                         if (first_sect)
 863                                 log_info("fio ");
 864                         if (!global)
 865                                 log_info("--name=%s ", name);
 866                         first_sect = 0;
 867                 }
 868
 869                 td = get_new_job(global, &def_thread);
 870                 if (!td) {
 871                         ret = 1;
 872                         break;
 873                 }
 874
 875                 /*
 876                  * Seperate multiple job files by a stonewall
 877                  */
 878                 if (!global && stonewall) {
 879                         td->o.stonewall = stonewall;
 880                         stonewall = 0;
 881                 }
 882
 883                 num_opts = 0;
 884                 memset(opts, 0, alloc_opts * sizeof(char *));
 885
 886                 while ((p = fgets(string, 4096, f)) != NULL) {
 887                         if (is_empty_or_comment(p))
 888                                 continue;
 889
 890                         strip_blank_front(&p);
 891
 892                         /*
 893                          * new section, break out and make sure we don't
 894                          * fgets() a new line at the top.
 895                          */
 896                         if (p[0] == '[') {
 897                                 skip_fgets = 1;
 898                                 break;
 899                         }
 900
 901                         strip_blank_end(p);
 902
 903                         if (num_opts == alloc_opts) {
 904                                 alloc_opts <<= 1;
 905                                 opts = realloc(opts,
 906                                                 alloc_opts * sizeof(char *));
 907                         }
 908
 909                         opts[num_opts] = strdup(p);
 910                         num_opts++;
 911                 }
 912
 913                 ret = fio_options_parse(td, opts, num_opts);
 914                 if (!ret) {
 915                         if (dump_cmdline)
 916                                 for (i = 0; i < num_opts; i++)
 917                                         log_info("--%s ", opts[i]);
 918
 919                         ret = add_job(td, name, 0);
 920                 } else {
 921                         log_err("fio: job %s dropped\n", name);
 922                         put_job(td);
 923                 }
 924
 925                 for (i = 0; i < num_opts; i++)
 926                         free(opts[i]);
 927                 num_opts = 0;
 928         } while (!ret);
 929
 930         if (dump_cmdline)
 931                 log_info("\n");
 932
 933         for (i = 0; i < num_opts; i++)
 934                 free(opts[i]);
 935
 936         free(string);
 937         free(name);
 938         free(opts);
 939         if (f != stdin)
 940                 fclose(f);
 941         return ret;
 942 }
 943
 944 static int fill_def_thread(void)
 945 {
 946         memset(&def_thread, 0, sizeof(def_thread));
 947
 948         fio_getaffinity(getpid(), &def_thread.o.cpumask);
 949
 950         /*
 951          * fill default options
 952          */
 953         fio_fill_default_options(&def_thread);
 954
 955         def_thread.o.timeout = def_timeout;
 956         return 0;
 957 }
 958
 959 static void free_shm(void)
 960 {
 961         struct shmid_ds sbuf;
 962
 963         if (threads) {
 964                 void *tp = threads;
 965
 966                 threads = NULL;
 967                 file_hash_exit();
 968                 fio_debug_jobp = NULL;
 969                 shmdt(tp);
 970                 shmctl(shm_id, IPC_RMID, &sbuf);
 971         }
 972
 973         scleanup();
 974 }
 975
 976 /*
 977  * The thread area is shared between the main process and the job
 978  * threads/processes. So setup a shared memory segment that will hold
 979  * all the job info. We use the end of the region for keeping track of
 980  * open files across jobs, for file sharing.
 981  */
 982 static int setup_thread_area(void)
 983 {
 984         void *hash;
 985
 986         /*
 987          * 1024 is too much on some machines, scale max_jobs if
 988          * we get a failure that looks like too large a shm segment
 989          */
 990         do {
 991                 size_t size = max_jobs * sizeof(struct thread_data);
 992
 993                 size += file_hash_size;
 994                 size += sizeof(unsigned int);
 995
 996                 shm_id = shmget(0, size, IPC_CREAT | 0600);
 997                 if (shm_id != -1)
 998                         break;
 999                 if (errno != EINVAL) {
1000                         perror("shmget");
1001                         break;
1002                 }
1003
1004                 max_jobs >>= 1;
1005         } while (max_jobs);
1006
1007         if (shm_id == -1)
1008                 return 1;
1009
1010         threads = shmat(shm_id, NULL, 0);
1011         if (threads == (void *) -1) {
1012                 perror("shmat");
1013                 return 1;
1014         }
1015
1016         memset(threads, 0, max_jobs * sizeof(struct thread_data));
1017         hash = (void *) threads + max_jobs * sizeof(struct thread_data);
1018         fio_debug_jobp = (void *) hash + file_hash_size;
1019         *fio_debug_jobp = -1;
1020         file_hash_init(hash);
1021         atexit(free_shm);
1022         return 0;
1023 }
1024
1025 static void usage(const char *name)
1026 {
1027         printf("%s [options] [job options] <job file(s)>\n", name);
1028         printf("\t--debug=options\tEnable debug logging\n");
1029         printf("\t--output\tWrite output to file\n");
1030         printf("\t--timeout\tRuntime in seconds\n");
1031         printf("\t--latency-log\tGenerate per-job latency logs\n");
1032         printf("\t--bandwidth-log\tGenerate per-job bandwidth logs\n");
1033         printf("\t--minimal\tMinimal (terse) output\n");
1034         printf("\t--version\tPrint version info and exit\n");
1035         printf("\t--help\t\tPrint this page\n");
1036         printf("\t--cmdhelp=cmd\tPrint command help, \"all\" for all of"
1037                 " them\n");
1038         printf("\t--showcmd\tTurn a job file into command line options\n");
1039         printf("\t--eta=when\tWhen ETA estimate should be printed\n");
1040         printf("\t          \tMay be \"always\", \"never\" or \"auto\"\n");
1041         printf("\t--readonly\tTurn on safety read-only checks, preventing"
1042                 " writes\n");
1043         printf("\t--section=name\tOnly run specified section in job file\n");
1044         printf("\t--alloc-size=kb\tSet smalloc pool to this size in kb"
1045                 " (def 1024)\n");
1046         printf("\t--warnings-fatal Fio parser warnings are fatal\n");
1047         printf("\t--max-jobs\tMaximum number of threads/processes to support\n");
1048         printf("\nFio was written by Jens Axboe <jens.axboe@oracle.com>");
1049         printf("\n                   Jens Axboe <jaxboe@fusionio.com>\n");
1050 }
1051
1052 #ifdef FIO_INC_DEBUG
1053 struct debug_level debug_levels[] = {
1054         { .name = "process",    .shift = FD_PROCESS, },
1055         { .name = "file",       .shift = FD_FILE, },
1056         { .name = "io",         .shift = FD_IO, },
1057         { .name = "mem",        .shift = FD_MEM, },
1058         { .name = "blktrace",   .shift = FD_BLKTRACE },
1059         { .name = "verify",     .shift = FD_VERIFY },
1060         { .name = "random",     .shift = FD_RANDOM },
1061         { .name = "parse",      .shift = FD_PARSE },
1062         { .name = "diskutil",   .shift = FD_DISKUTIL },
1063         { .name = "job",        .shift = FD_JOB },
1064         { .name = "mutex",      .shift = FD_MUTEX },
1065         { .name = "profile",    .shift = FD_PROFILE },
1066         { .name = "time",       .shift = FD_TIME },
1067         { .name = NULL, },
1068 };
1069
1070 static int set_debug(const char *string)
1071 {
1072         struct debug_level *dl;
1073         char *p = (char *) string;
1074         char *opt;
1075         int i;
1076
1077         if (!strcmp(string, "?") || !strcmp(string, "help")) {
1078                 log_info("fio: dumping debug options:");
1079                 for (i = 0; debug_levels[i].name; i++) {
1080                         dl = &debug_levels[i];
1081                         log_info("%s,", dl->name);
1082                 }
1083                 log_info("all\n");
1084                 return 1;
1085         }
1086
1087         while ((opt = strsep(&p, ",")) != NULL) {
1088                 int found = 0;
1089
1090                 if (!strncmp(opt, "all", 3)) {
1091                         log_info("fio: set all debug options\n");
1092                         fio_debug = ~0UL;
1093                         continue;
1094                 }
1095
1096                 for (i = 0; debug_levels[i].name; i++) {
1097                         dl = &debug_levels[i];
1098                         found = !strncmp(opt, dl->name, strlen(dl->name));
1099                         if (!found)
1100                                 continue;
1101
1102                         if (dl->shift == FD_JOB) {
1103                                 opt = strchr(opt, ':');
1104                                 if (!opt) {
1105                                         log_err("fio: missing job number\n");
1106                                         break;
1107                                 }
1108                                 opt++;
1109                                 fio_debug_jobno = atoi(opt);
1110                                 log_info("fio: set debug jobno %d\n",
1111                                                         fio_debug_jobno);
1112                         } else {
1113                                 log_info("fio: set debug option %s\n", opt);
1114                                 fio_debug |= (1UL << dl->shift);
1115                         }
1116                         break;
1117                 }
1118
1119                 if (!found)
1120                         log_err("fio: debug mask %s not found\n", opt);
1121         }
1122         return 0;
1123 }
1124 #else
1125 static int set_debug(const char *string)
1126 {
1127         log_err("fio: debug tracing not included in build\n");
1128         return 1;
1129 }
1130 #endif
1131
1132 static void fio_options_fill_optstring(void)
1133 {
1134         char *ostr = cmd_optstr;
1135         int i, c;
1136
1137         c = i = 0;
1138         while (l_opts[i].name) {
1139                 ostr[c++] = l_opts[i].val;
1140                 if (l_opts[i].has_arg == required_argument)
1141                         ostr[c++] = ':';
1142                 else if (l_opts[i].has_arg == optional_argument) {
1143                         ostr[c++] = ':';
1144                         ostr[c++] = ':';
1145                 }
1146                 i++;
1147         }
1148         ostr[c] = '\0';
1149 }
1150
1151 static int parse_cmd_line(int argc, char *argv[])
1152 {
1153         struct thread_data *td = NULL;
1154         int c, ini_idx = 0, lidx, ret = 0, do_exit = 0, exit_val = 0;
1155         char *ostr = cmd_optstr;
1156
1157         while ((c = getopt_long_only(argc, argv, ostr, l_opts, &lidx)) != -1) {
1158                 switch (c) {
1159                 case 'a':
1160                         smalloc_pool_size = atoi(optarg);
1161                         break;
1162                 case 't':
1163                         def_timeout = atoi(optarg);
1164                         break;
1165                 case 'l':
1166                         write_lat_log = 1;
1167                         break;
1168                 case 'b':
1169                         write_bw_log = 1;
1170                         break;
1171                 case 'o':
1172                         f_out = fopen(optarg, "w+");
1173                         if (!f_out) {
1174                                 perror("fopen output");
1175                                 exit(1);
1176                         }
1177                         f_err = f_out;
1178                         break;
1179                 case 'm':
1180                         terse_output = 1;
1181                         break;
1182                 case 'h':
1183                         usage(argv[0]);
1184                         exit(0);
1185                 case 'c':
1186                         exit(fio_show_option_help(optarg));
1187                 case 's':
1188                         dump_cmdline = 1;
1189                         break;
1190                 case 'r':
1191                         read_only = 1;
1192                         break;
1193                 case 'v':
1194                         log_info("%s\n", fio_version_string);
1195                         exit(0);
1196                 case 'e':
1197                         if (!strcmp("always", optarg))
1198                                 eta_print = FIO_ETA_ALWAYS;
1199                         else if (!strcmp("never", optarg))
1200                                 eta_print = FIO_ETA_NEVER;
1201                         break;
1202                 case 'd':
1203                         if (set_debug(optarg))
1204                                 do_exit++;
1205                         break;
1206                 case 'x': {
1207                         size_t new_size;
1208
1209                         if (!strcmp(optarg, "global")) {
1210                                 log_err("fio: can't use global as only "
1211                                         "section\n");
1212                                 do_exit++;
1213                                 exit_val = 1;
1214                                 break;
1215                         }
1216                         new_size = (nr_job_sections + 1) * sizeof(char *);
1217                         job_sections = realloc(job_sections, new_size);
1218                         job_sections[nr_job_sections] = strdup(optarg);
1219                         nr_job_sections++;
1220                         break;
1221                         }
1222                 case 'p':
1223                         exec_profile = strdup(optarg);
1224                         break;
1225                 case FIO_GETOPT_JOB: {
1226                         const char *opt = l_opts[lidx].name;
1227                         char *val = optarg;
1228
1229                         if (!strncmp(opt, "name", 4) && td) {
1230                                 ret = add_job(td, td->o.name ?: "fio", 0);
1231                                 if (ret)
1232                                         return 0;
1233                                 td = NULL;
1234                         }
1235                         if (!td) {
1236                                 int is_section = !strncmp(opt, "name", 4);
1237                                 int global = 0;
1238
1239                                 if (!is_section || !strncmp(val, "global", 6))
1240                                         global = 1;
1241
1242                                 if (is_section && skip_this_section(val))
1243                                         continue;
1244
1245                                 td = get_new_job(global, &def_thread);
1246                                 if (!td)
1247                                         return 0;
1248                         }
1249
1250                         ret = fio_cmd_option_parse(td, opt, val);
1251                         break;
1252                 }
1253                 case 'w':
1254                         warnings_fatal = 1;
1255                         break;
1256                 case 'j':
1257                         max_jobs = atoi(optarg);
1258                         if (!max_jobs || max_jobs > REAL_MAX_JOBS) {
1259                                 log_err("fio: invalid max jobs: %d\n", max_jobs);
1260                                 do_exit++;
1261                                 exit_val = 1;
1262                         }
1263                         break;
1264                 default:
1265                         do_exit++;
1266                         exit_val = 1;
1267                         break;
1268                 }
1269         }
1270
1271         if (do_exit)
1272                 exit(exit_val);
1273
1274         if (td) {
1275                 if (!ret)
1276                         ret = add_job(td, td->o.name ?: "fio", 0);
1277         }
1278
1279         while (optind < argc) {
1280                 ini_idx++;
1281                 ini_file = realloc(ini_file, ini_idx * sizeof(char *));
1282                 ini_file[ini_idx - 1] = strdup(argv[optind]);
1283                 optind++;
1284         }
1285
1286         return ini_idx;
1287 }
1288
1289 int parse_options(int argc, char *argv[])
1290 {
1291         int job_files, i;
1292
1293         f_out = stdout;
1294         f_err = stderr;
1295
1296         fio_options_fill_optstring();
1297         fio_options_dup_and_init(l_opts);
1298
1299         if (setup_thread_area())
1300                 return 1;
1301         if (fill_def_thread())
1302                 return 1;
1303
1304         job_files = parse_cmd_line(argc, argv);
1305
1306         for (i = 0; i < job_files; i++) {
1307                 if (fill_def_thread())
1308                         return 1;
1309                 if (parse_jobs_ini(ini_file[i], i))
1310                         return 1;
1311                 free(ini_file[i]);
1312         }
1313
1314         free(ini_file);
1315         options_mem_free(&def_thread);
1316
1317         if (!thread_number) {
1318                 if (dump_cmdline)
1319                         return 0;
1320                 if (exec_profile)
1321                         return 0;
1322
1323                 log_err("No jobs(s) defined\n\n");
1324                 usage(argv[0]);
1325                 return 1;
1326         }
1327
1328         if (def_thread.o.gtod_offload) {
1329                 fio_gtod_init();
1330                 fio_gtod_offload = 1;
1331                 fio_gtod_cpu = def_thread.o.gtod_cpu;
1332         }
1333
1334         log_info("%s\n", fio_version_string);
1335         return 0;
1336 }