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 1.51";
  26
  27 #define FIO_RANDSEED            (0xb1899bedUL)
  28
  29 static char **ini_file;
  30 static int max_jobs = MAX_JOBS;
  31 static int dump_cmdline;
  32
  33 static struct thread_data def_thread;
  34 struct thread_data *threads = NULL;
  35
  36 int exitall_on_terminate = 0;
  37 int terse_output = 0;
  38 int eta_print;
  39 unsigned long long mlock_size = 0;
  40 FILE *f_out = NULL;
  41 FILE *f_err = NULL;
  42 char **job_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           = "output",
  68                 .has_arg        = required_argument,
  69                 .val            = 'o',
  70         },
  71         {
  72                 .name           = "timeout",
  73                 .has_arg        = required_argument,
  74                 .val            = 't',
  75         },
  76         {
  77                 .name           = "latency-log",
  78                 .has_arg        = required_argument,
  79                 .val            = 'l',
  80         },
  81         {
  82                 .name           = "bandwidth-log",
  83                 .has_arg        = required_argument,
  84                 .val            = 'b',
  85         },
  86         {
  87                 .name           = "minimal",
  88                 .has_arg        = optional_argument,
  89                 .val            = 'm',
  90         },
  91         {
  92                 .name           = "version",
  93                 .has_arg        = no_argument,
  94                 .val            = 'v',
  95         },
  96         {
  97                 .name           = "help",
  98                 .has_arg        = no_argument,
  99                 .val            = 'h',
 100         },
 101         {
 102                 .name           = "cmdhelp",
 103                 .has_arg        = optional_argument,
 104                 .val            = 'c',
 105         },
 106         {
 107                 .name           = "showcmd",
 108                 .has_arg        = no_argument,
 109                 .val            = 's',
 110         },
 111         {
 112                 .name           = "readonly",
 113                 .has_arg        = no_argument,
 114                 .val            = 'r',
 115         },
 116         {
 117                 .name           = "eta",
 118                 .has_arg        = required_argument,
 119                 .val            = 'e',
 120         },
 121         {
 122                 .name           = "debug",
 123                 .has_arg        = required_argument,
 124                 .val            = 'd',
 125         },
 126         {
 127                 .name           = "section",
 128                 .has_arg        = required_argument,
 129                 .val            = 'x',
 130         },
 131         {
 132                 .name           = "alloc-size",
 133                 .has_arg        = required_argument,
 134                 .val            = 'a',
 135         },
 136         {
 137                 .name           = "profile",
 138                 .has_arg        = required_argument,
 139                 .val            = 'p',
 140         },
 141         {
 142                 .name           = "warnings-fatal",
 143                 .has_arg        = no_argument,
 144                 .val            = 'w',
 145         },
 146         {
 147                 .name           = NULL,
 148         },
 149 };
 150
 151 FILE *get_f_out()
 152 {
 153         return f_out;
 154 }
 155
 156 FILE *get_f_err()
 157 {
 158         return f_err;
 159 }
 160
 161 /*
 162  * Return a free job structure.
 163  */
 164 static struct thread_data *get_new_job(int global, struct thread_data *parent)
 165 {
 166         struct thread_data *td;
 167
 168         if (global)
 169                 return &def_thread;
 170         if (thread_number >= max_jobs) {
 171                 log_err("error: maximum number of jobs (%d) reached.\n",
 172                                 max_jobs);
 173                 return NULL;
 174         }
 175
 176         td = &threads[thread_number++];
 177         *td = *parent;
 178
 179         td->o.uid = td->o.gid = -1U;
 180
 181         dup_files(td, parent);
 182         options_mem_dupe(td);
 183
 184         profile_add_hooks(td);
 185
 186         td->thread_number = thread_number;
 187         return td;
 188 }
 189
 190 static void put_job(struct thread_data *td)
 191 {
 192         if (td == &def_thread)
 193                 return;
 194
 195         profile_td_exit(td);
 196
 197         if (td->error)
 198                 log_info("fio: %s\n", td->verror);
 199
 200         memset(&threads[td->thread_number - 1], 0, sizeof(*td));
 201         thread_number--;
 202 }
 203
 204 static int __setup_rate(struct thread_data *td, enum fio_ddir ddir)
 205 {
 206         unsigned int bs = td->o.min_bs[ddir];
 207         unsigned long long bytes_per_sec;
 208
 209         assert(ddir_rw(ddir));
 210
 211         if (td->o.rate[ddir])
 212                 bytes_per_sec = td->o.rate[ddir];
 213         else
 214                 bytes_per_sec = td->o.rate_iops[ddir] * bs;
 215
 216         if (!bytes_per_sec) {
 217                 log_err("rate lower than supported\n");
 218                 return -1;
 219         }
 220
 221         td->rate_nsec_cycle[ddir] = 1000000000ULL / bytes_per_sec;
 222         td->rate_pending_usleep[ddir] = 0;
 223         return 0;
 224 }
 225
 226 static int setup_rate(struct thread_data *td)
 227 {
 228         int ret = 0;
 229
 230         if (td->o.rate[DDIR_READ] || td->o.rate_iops[DDIR_READ])
 231                 ret = __setup_rate(td, DDIR_READ);
 232         if (td->o.rate[DDIR_WRITE] || td->o.rate_iops[DDIR_WRITE])
 233                 ret |= __setup_rate(td, DDIR_WRITE);
 234
 235         return ret;
 236 }
 237
 238 static int fixed_block_size(struct thread_options *o)
 239 {
 240         return o->min_bs[DDIR_READ] == o->max_bs[DDIR_READ] &&
 241                 o->min_bs[DDIR_WRITE] == o->max_bs[DDIR_WRITE] &&
 242                 o->min_bs[DDIR_READ] == o->min_bs[DDIR_WRITE];
 243 }
 244
 245 /*
 246  * Lazy way of fixing up options that depend on each other. We could also
 247  * define option callback handlers, but this is easier.
 248  */
 249 static int fixup_options(struct thread_data *td)
 250 {
 251         struct thread_options *o = &td->o;
 252         int ret = 0;
 253
 254 #ifndef FIO_HAVE_PSHARED_MUTEX
 255         if (!o->use_thread) {
 256                 log_info("fio: this platform does not support process shared"
 257                          " mutexes, forcing use of threads. Use the 'thread'"
 258                          " option to get rid of this warning.\n");
 259                 o->use_thread = 1;
 260                 ret = warnings_fatal;
 261         }
 262 #endif
 263
 264         if (o->write_iolog_file && o->read_iolog_file) {
 265                 log_err("fio: read iolog overrides write_iolog\n");
 266                 free(o->write_iolog_file);
 267                 o->write_iolog_file = NULL;
 268                 ret = warnings_fatal;
 269         }
 270
 271         /*
 272          * only really works for sequential io for now, and with 1 file
 273          */
 274         if (o->zone_size && td_random(td) && o->open_files == 1)
 275                 o->zone_size = 0;
 276
 277         /*
 278          * Reads can do overwrites, we always need to pre-create the file
 279          */
 280         if (td_read(td) || td_rw(td))
 281                 o->overwrite = 1;
 282
 283         if (!o->min_bs[DDIR_READ])
 284                 o->min_bs[DDIR_READ] = o->bs[DDIR_READ];
 285         if (!o->max_bs[DDIR_READ])
 286                 o->max_bs[DDIR_READ] = o->bs[DDIR_READ];
 287         if (!o->min_bs[DDIR_WRITE])
 288                 o->min_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 289         if (!o->max_bs[DDIR_WRITE])
 290                 o->max_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 291
 292         o->rw_min_bs = min(o->min_bs[DDIR_READ], o->min_bs[DDIR_WRITE]);
 293
 294         /*
 295          * For random IO, allow blockalign offset other than min_bs.
 296          */
 297         if (!o->ba[DDIR_READ] || !td_random(td))
 298                 o->ba[DDIR_READ] = o->min_bs[DDIR_READ];
 299         if (!o->ba[DDIR_WRITE] || !td_random(td))
 300                 o->ba[DDIR_WRITE] = o->min_bs[DDIR_WRITE];
 301
 302         if ((o->ba[DDIR_READ] != o->min_bs[DDIR_READ] ||
 303             o->ba[DDIR_WRITE] != o->min_bs[DDIR_WRITE]) &&
 304             !o->norandommap) {
 305                 log_err("fio: Any use of blockalign= turns off randommap\n");
 306                 o->norandommap = 1;
 307                 ret = warnings_fatal;
 308         }
 309
 310         if (!o->file_size_high)
 311                 o->file_size_high = o->file_size_low;
 312
 313         if (o->norandommap && o->verify != VERIFY_NONE
 314             && !fixed_block_size(o))  {
 315                 log_err("fio: norandommap given for variable block sizes, "
 316                         "verify disabled\n");
 317                 o->verify = VERIFY_NONE;
 318                 ret = warnings_fatal;
 319         }
 320         if (o->bs_unaligned && (o->odirect || td->io_ops->flags & FIO_RAWIO))
 321                 log_err("fio: bs_unaligned may not work with raw io\n");
 322
 323         /*
 324          * thinktime_spin must be less than thinktime
 325          */
 326         if (o->thinktime_spin > o->thinktime)
 327                 o->thinktime_spin = o->thinktime;
 328
 329         /*
 330          * The low water mark cannot be bigger than the iodepth
 331          */
 332         if (o->iodepth_low > o->iodepth || !o->iodepth_low) {
 333                 /*
 334                  * syslet work around - if the workload is sequential,
 335                  * we want to let the queue drain all the way down to
 336                  * avoid seeking between async threads
 337                  */
 338                 if (!strcmp(td->io_ops->name, "syslet-rw") && !td_random(td))
 339                         o->iodepth_low = 1;
 340                 else
 341                         o->iodepth_low = o->iodepth;
 342         }
 343
 344         /*
 345          * If batch number isn't set, default to the same as iodepth
 346          */
 347         if (o->iodepth_batch > o->iodepth || !o->iodepth_batch)
 348                 o->iodepth_batch = o->iodepth;
 349
 350         if (o->nr_files > td->files_index)
 351                 o->nr_files = td->files_index;
 352
 353         if (o->open_files > o->nr_files || !o->open_files)
 354                 o->open_files = o->nr_files;
 355
 356         if (((o->rate[0] + o->rate[1]) && (o->rate_iops[0] + o->rate_iops[1]))||
 357             ((o->ratemin[0] + o->ratemin[1]) && (o->rate_iops_min[0] +
 358                 o->rate_iops_min[1]))) {
 359                 log_err("fio: rate and rate_iops are mutually exclusive\n");
 360                 ret = 1;
 361         }
 362         if ((o->rate[0] < o->ratemin[0]) || (o->rate[1] < o->ratemin[1]) ||
 363             (o->rate_iops[0] < o->rate_iops_min[0]) ||
 364             (o->rate_iops[1] < o->rate_iops_min[1])) {
 365                 log_err("fio: minimum rate exceeds rate\n");
 366                 ret = 1;
 367         }
 368
 369         if (!o->timeout && o->time_based) {
 370                 log_err("fio: time_based requires a runtime/timeout setting\n");
 371                 o->time_based = 0;
 372                 ret = warnings_fatal;
 373         }
 374
 375         if (o->fill_device && !o->size)
 376                 o->size = -1ULL;
 377
 378         if (o->verify != VERIFY_NONE) {
 379                 if (td_write(td) && o->do_verify && o->numjobs > 1) {
 380                         log_info("Multiple writers may overwrite blocks that "
 381                                 "belong to other jobs. This can cause "
 382                                 "verification failures.\n");
 383                         ret = warnings_fatal;
 384                 }
 385
 386                 o->refill_buffers = 1;
 387                 if (o->max_bs[DDIR_WRITE] != o->min_bs[DDIR_WRITE] &&
 388                     !o->verify_interval)
 389                         o->verify_interval = o->min_bs[DDIR_WRITE];
 390         }
 391
 392         if (o->pre_read) {
 393                 o->invalidate_cache = 0;
 394                 if (td->io_ops->flags & FIO_PIPEIO) {
 395                         log_info("fio: cannot pre-read files with an IO engine"
 396                                  " that isn't seekable. Pre-read disabled.\n");
 397                         ret = warnings_fatal;
 398                 }
 399         }
 400
 401 #ifndef FIO_HAVE_FDATASYNC
 402         if (o->fdatasync_blocks) {
 403                 log_info("fio: this platform does not support fdatasync()"
 404                          " falling back to using fsync().  Use the 'fsync'"
 405                          " option instead of 'fdatasync' to get rid of"
 406                          " this warning\n");
 407                 o->fsync_blocks = o->fdatasync_blocks;
 408                 o->fdatasync_blocks = 0;
 409                 ret = warnings_fatal;
 410         }
 411 #endif
 412
 413         return ret;
 414 }
 415
 416 /*
 417  * This function leaks the buffer
 418  */
 419 static char *to_kmg(unsigned int val)
 420 {
 421         char *buf = malloc(32);
 422         char post[] = { 0, 'K', 'M', 'G', 'P', 'E', 0 };
 423         char *p = post;
 424
 425         do {
 426                 if (val & 1023)
 427                         break;
 428
 429                 val >>= 10;
 430                 p++;
 431         } while (*p);
 432
 433         snprintf(buf, 31, "%u%c", val, *p);
 434         return buf;
 435 }
 436
 437 /* External engines are specified by "external:name.o") */
 438 static const char *get_engine_name(const char *str)
 439 {
 440         char *p = strstr(str, ":");
 441
 442         if (!p)
 443                 return str;
 444
 445         p++;
 446         strip_blank_front(&p);
 447         strip_blank_end(p);
 448         return p;
 449 }
 450
 451 static int exists_and_not_file(const char *filename)
 452 {
 453         struct stat sb;
 454
 455         if (lstat(filename, &sb) == -1)
 456                 return 0;
 457
 458         /* \\.\ is the device namespace in Windows, where every file
 459          * is a device node */
 460         if (S_ISREG(sb.st_mode) && strncmp(filename, "\\\\.\\", 4) != 0)
 461                 return 0;
 462
 463         return 1;
 464 }
 465
 466 void td_fill_rand_seeds(struct thread_data *td)
 467 {
 468         os_random_seed(td->rand_seeds[0], &td->bsrange_state);
 469         os_random_seed(td->rand_seeds[1], &td->verify_state);
 470         os_random_seed(td->rand_seeds[2], &td->rwmix_state);
 471
 472         if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
 473                 os_random_seed(td->rand_seeds[3], &td->next_file_state);
 474
 475         os_random_seed(td->rand_seeds[5], &td->file_size_state);
 476         os_random_seed(td->rand_seeds[6], &td->trim_state);
 477
 478         if (!td_random(td))
 479                 return;
 480
 481         if (td->o.rand_repeatable)
 482                 td->rand_seeds[4] = FIO_RANDSEED * td->thread_number;
 483
 484         os_random_seed(td->rand_seeds[4], &td->random_state);
 485 }
 486
 487 /*
 488  * Initialize the various random states we need (random io, block size ranges,
 489  * read/write mix, etc).
 490  */
 491 static int init_random_state(struct thread_data *td)
 492 {
 493         int fd;
 494
 495         fd = open("/dev/urandom", O_RDONLY);
 496         if (fd == -1) {
 497                 td_verror(td, errno, "open");
 498                 return 1;
 499         }
 500
 501         if (read(fd, td->rand_seeds, sizeof(td->rand_seeds)) <
 502             (int) sizeof(td->rand_seeds)) {
 503                 td_verror(td, EIO, "read");
 504                 close(fd);
 505                 return 1;
 506         }
 507
 508         close(fd);
 509         td_fill_rand_seeds(td);
 510         return 0;
 511 }
 512
 513 /*
 514  * Adds a job to the list of things todo. Sanitizes the various options
 515  * to make sure we don't have conflicts, and initializes various
 516  * members of td.
 517  */
 518 static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
 519 {
 520         const char *ddir_str[] = { NULL, "read", "write", "rw", NULL,
 521                                    "randread", "randwrite", "randrw" };
 522         unsigned int i;
 523         const char *engine;
 524         char fname[PATH_MAX];
 525         int numjobs, file_alloced;
 526
 527         /*
 528          * the def_thread is just for options, it's not a real job
 529          */
 530         if (td == &def_thread)
 531                 return 0;
 532
 533         /*
 534          * if we are just dumping the output command line, don't add the job
 535          */
 536         if (dump_cmdline) {
 537                 put_job(td);
 538                 return 0;
 539         }
 540
 541         if (profile_td_init(td))
 542                 return 1;
 543
 544         engine = get_engine_name(td->o.ioengine);
 545         td->io_ops = load_ioengine(td, engine);
 546         if (!td->io_ops) {
 547                 log_err("fio: failed to load engine %s\n", engine);
 548                 goto err;
 549         }
 550
 551         if (td->o.use_thread)
 552                 nr_thread++;
 553         else
 554                 nr_process++;
 555
 556         if (td->o.odirect)
 557                 td->io_ops->flags |= FIO_RAWIO;
 558
 559         file_alloced = 0;
 560         if (!td->o.filename && !td->files_index && !td->o.read_iolog_file) {
 561                 file_alloced = 1;
 562
 563                 if (td->o.nr_files == 1 && exists_and_not_file(jobname))
 564                         add_file(td, jobname);
 565                 else {
 566                         for (i = 0; i < td->o.nr_files; i++) {
 567                                 sprintf(fname, "%s.%d.%d", jobname,
 568                                                         td->thread_number, i);
 569                                 add_file(td, fname);
 570                         }
 571                 }
 572         }
 573
 574         if (fixup_options(td))
 575                 goto err;
 576
 577         if (td->io_ops->flags & FIO_DISKLESSIO) {
 578                 struct fio_file *f;
 579
 580                 for_each_file(td, f, i)
 581                         f->real_file_size = -1ULL;
 582         }
 583
 584         td->mutex = fio_mutex_init(0);
 585
 586         td->ts.clat_stat[0].min_val = td->ts.clat_stat[1].min_val = ULONG_MAX;
 587         td->ts.slat_stat[0].min_val = td->ts.slat_stat[1].min_val = ULONG_MAX;
 588         td->ts.lat_stat[0].min_val = td->ts.lat_stat[1].min_val = ULONG_MAX;
 589         td->ts.bw_stat[0].min_val = td->ts.bw_stat[1].min_val = ULONG_MAX;
 590         td->ddir_seq_nr = td->o.ddir_seq_nr;
 591
 592         if ((td->o.stonewall || td->o.new_group) && prev_group_jobs) {
 593                 prev_group_jobs = 0;
 594                 groupid++;
 595         }
 596
 597         td->groupid = groupid;
 598         prev_group_jobs++;
 599
 600         if (init_random_state(td))
 601                 goto err;
 602
 603         if (setup_rate(td))
 604                 goto err;
 605
 606         if (td->o.write_lat_log) {
 607                 setup_log(&td->ts.lat_log);
 608                 setup_log(&td->ts.slat_log);
 609                 setup_log(&td->ts.clat_log);
 610         }
 611         if (td->o.write_bw_log)
 612                 setup_log(&td->ts.bw_log);
 613
 614         if (!td->o.name)
 615                 td->o.name = strdup(jobname);
 616
 617         if (!terse_output) {
 618                 if (!job_add_num) {
 619                         if (!strcmp(td->io_ops->name, "cpuio")) {
 620                                 log_info("%s: ioengine=cpu, cpuload=%u,"
 621                                          " cpucycle=%u\n", td->o.name,
 622                                                         td->o.cpuload,
 623                                                         td->o.cpucycle);
 624                         } else {
 625                                 char *c1, *c2, *c3, *c4;
 626
 627                                 c1 = to_kmg(td->o.min_bs[DDIR_READ]);
 628                                 c2 = to_kmg(td->o.max_bs[DDIR_READ]);
 629                                 c3 = to_kmg(td->o.min_bs[DDIR_WRITE]);
 630                                 c4 = to_kmg(td->o.max_bs[DDIR_WRITE]);
 631
 632                                 log_info("%s: (g=%d): rw=%s, bs=%s-%s/%s-%s,"
 633                                          " ioengine=%s, iodepth=%u\n",
 634                                                 td->o.name, td->groupid,
 635                                                 ddir_str[td->o.td_ddir],
 636                                                 c1, c2, c3, c4,
 637                                                 td->io_ops->name,
 638                                                 td->o.iodepth);
 639
 640                                 free(c1);
 641                                 free(c2);
 642                                 free(c3);
 643                                 free(c4);
 644                         }
 645                 } else if (job_add_num == 1)
 646                         log_info("...\n");
 647         }
 648
 649         /*
 650          * recurse add identical jobs, clear numjobs and stonewall options
 651          * as they don't apply to sub-jobs
 652          */
 653         numjobs = td->o.numjobs;
 654         while (--numjobs) {
 655                 struct thread_data *td_new = get_new_job(0, td);
 656
 657                 if (!td_new)
 658                         goto err;
 659
 660                 td_new->o.numjobs = 1;
 661                 td_new->o.stonewall = 0;
 662                 td_new->o.new_group = 0;
 663
 664                 if (file_alloced) {
 665                         td_new->o.filename = NULL;
 666                         td_new->files_index = 0;
 667                         td_new->files_size = 0;
 668                         td_new->files = NULL;
 669                 }
 670
 671                 job_add_num = numjobs - 1;
 672
 673                 if (add_job(td_new, jobname, job_add_num))
 674                         goto err;
 675         }
 676
 677         return 0;
 678 err:
 679         put_job(td);
 680         return -1;
 681 }
 682
 683 /*
 684  * Parse as if 'o' was a command line
 685  */
 686 void add_job_opts(const char **o)
 687 {
 688         struct thread_data *td, *td_parent;
 689         int i, in_global = 1;
 690         char jobname[32];
 691
 692         i = 0;
 693         td_parent = td = NULL;
 694         while (o[i]) {
 695                 if (!strncmp(o[i], "name", 4)) {
 696                         in_global = 0;
 697                         if (td)
 698                                 add_job(td, jobname, 0);
 699                         td = NULL;
 700                         sprintf(jobname, "%s", o[i] + 5);
 701                 }
 702                 if (in_global && !td_parent)
 703                         td_parent = get_new_job(1, &def_thread);
 704                 else if (!in_global && !td) {
 705                         if (!td_parent)
 706                                 td_parent = &def_thread;
 707                         td = get_new_job(0, td_parent);
 708                 }
 709                 if (in_global)
 710                         fio_options_parse(td_parent, (char **) &o[i], 1);
 711                 else
 712                         fio_options_parse(td, (char **) &o[i], 1);
 713                 i++;
 714         }
 715
 716         if (td)
 717                 add_job(td, jobname, 0);
 718 }
 719
 720 static int skip_this_section(const char *name)
 721 {
 722         int i;
 723
 724         if (!nr_job_sections)
 725                 return 0;
 726         if (!strncmp(name, "global", 6))
 727                 return 0;
 728
 729         for (i = 0; i < nr_job_sections; i++)
 730                 if (!strcmp(job_sections[i], name))
 731                         return 0;
 732
 733         return 1;
 734 }
 735
 736 static int is_empty_or_comment(char *line)
 737 {
 738         unsigned int i;
 739
 740         for (i = 0; i < strlen(line); i++) {
 741                 if (line[i] == ';')
 742                         return 1;
 743                 if (line[i] == '#')
 744                         return 1;
 745                 if (!isspace(line[i]) && !iscntrl(line[i]))
 746                         return 0;
 747         }
 748
 749         return 1;
 750 }
 751
 752 /*
 753  * This is our [ini] type file parser.
 754  */
 755 static int parse_jobs_ini(char *file, int stonewall_flag)
 756 {
 757         unsigned int global;
 758         struct thread_data *td;
 759         char *string, *name;
 760         FILE *f;
 761         char *p;
 762         int ret = 0, stonewall;
 763         int first_sect = 1;
 764         int skip_fgets = 0;
 765         int inside_skip = 0;
 766         char **opts;
 767         int i, alloc_opts, num_opts;
 768
 769         if (!strcmp(file, "-"))
 770                 f = stdin;
 771         else
 772                 f = fopen(file, "r");
 773
 774         if (!f) {
 775                 perror("fopen job file");
 776                 return 1;
 777         }
 778
 779         string = malloc(4096);
 780
 781         /*
 782          * it's really 256 + small bit, 280 should suffice
 783          */
 784         name = malloc(280);
 785         memset(name, 0, 280);
 786
 787         alloc_opts = 8;
 788         opts = malloc(sizeof(char *) * alloc_opts);
 789         num_opts = 0;
 790
 791         stonewall = stonewall_flag;
 792         do {
 793                 /*
 794                  * if skip_fgets is set, we already have loaded a line we
 795                  * haven't handled.
 796                  */
 797                 if (!skip_fgets) {
 798                         p = fgets(string, 4095, f);
 799                         if (!p)
 800                                 break;
 801                 }
 802
 803                 skip_fgets = 0;
 804                 strip_blank_front(&p);
 805                 strip_blank_end(p);
 806
 807                 if (is_empty_or_comment(p))
 808                         continue;
 809                 if (sscanf(p, "[%255s]", name) != 1) {
 810                         if (inside_skip)
 811                                 continue;
 812                         log_err("fio: option <%s> outside of [] job section\n",
 813                                                                         p);
 814                         break;
 815                 }
 816
 817                 name[strlen(name) - 1] = '\0';
 818
 819                 if (skip_this_section(name)) {
 820                         inside_skip = 1;
 821                         continue;
 822                 } else
 823                         inside_skip = 0;
 824
 825                 global = !strncmp(name, "global", 6);
 826
 827                 if (dump_cmdline) {
 828                         if (first_sect)
 829                                 log_info("fio ");
 830                         if (!global)
 831                                 log_info("--name=%s ", name);
 832                         first_sect = 0;
 833                 }
 834
 835                 td = get_new_job(global, &def_thread);
 836                 if (!td) {
 837                         ret = 1;
 838                         break;
 839                 }
 840
 841                 /*
 842                  * Seperate multiple job files by a stonewall
 843                  */
 844                 if (!global && stonewall) {
 845                         td->o.stonewall = stonewall;
 846                         stonewall = 0;
 847                 }
 848
 849                 num_opts = 0;
 850                 memset(opts, 0, alloc_opts * sizeof(char *));
 851
 852                 while ((p = fgets(string, 4096, f)) != NULL) {
 853                         if (is_empty_or_comment(p))
 854                                 continue;
 855
 856                         strip_blank_front(&p);
 857
 858                         /*
 859                          * new section, break out and make sure we don't
 860                          * fgets() a new line at the top.
 861                          */
 862                         if (p[0] == '[') {
 863                                 skip_fgets = 1;
 864                                 break;
 865                         }
 866
 867                         strip_blank_end(p);
 868
 869                         if (num_opts == alloc_opts) {
 870                                 alloc_opts <<= 1;
 871                                 opts = realloc(opts,
 872                                                 alloc_opts * sizeof(char *));
 873                         }
 874
 875                         opts[num_opts] = strdup(p);
 876                         num_opts++;
 877                 }
 878
 879                 ret = fio_options_parse(td, opts, num_opts);
 880                 if (!ret) {
 881                         if (dump_cmdline)
 882                                 for (i = 0; i < num_opts; i++)
 883                                         log_info("--%s ", opts[i]);
 884
 885                         ret = add_job(td, name, 0);
 886                 } else {
 887                         log_err("fio: job %s dropped\n", name);
 888                         put_job(td);
 889                 }
 890
 891                 for (i = 0; i < num_opts; i++)
 892                         free(opts[i]);
 893                 num_opts = 0;
 894         } while (!ret);
 895
 896         if (dump_cmdline)
 897                 log_info("\n");
 898
 899         for (i = 0; i < num_opts; i++)
 900                 free(opts[i]);
 901
 902         free(string);
 903         free(name);
 904         free(opts);
 905         if (f != stdin)
 906                 fclose(f);
 907         return ret;
 908 }
 909
 910 static int fill_def_thread(void)
 911 {
 912         memset(&def_thread, 0, sizeof(def_thread));
 913
 914         fio_getaffinity(getpid(), &def_thread.o.cpumask);
 915
 916         /*
 917          * fill default options
 918          */
 919         fio_fill_default_options(&def_thread);
 920
 921         def_thread.o.timeout = def_timeout;
 922         return 0;
 923 }
 924
 925 static void free_shm(void)
 926 {
 927         struct shmid_ds sbuf;
 928
 929         if (threads) {
 930                 void *tp = threads;
 931
 932                 threads = NULL;
 933                 file_hash_exit();
 934                 fio_debug_jobp = NULL;
 935                 shmdt(tp);
 936                 shmctl(shm_id, IPC_RMID, &sbuf);
 937         }
 938
 939         scleanup();
 940 }
 941
 942 /*
 943  * The thread area is shared between the main process and the job
 944  * threads/processes. So setup a shared memory segment that will hold
 945  * all the job info. We use the end of the region for keeping track of
 946  * open files across jobs, for file sharing.
 947  */
 948 static int setup_thread_area(void)
 949 {
 950         void *hash;
 951
 952         /*
 953          * 1024 is too much on some machines, scale max_jobs if
 954          * we get a failure that looks like too large a shm segment
 955          */
 956         do {
 957                 size_t size = max_jobs * sizeof(struct thread_data);
 958
 959                 size += file_hash_size;
 960                 size += sizeof(unsigned int);
 961
 962                 shm_id = shmget(0, size, IPC_CREAT | 0600);
 963                 if (shm_id != -1)
 964                         break;
 965                 if (errno != EINVAL) {
 966                         perror("shmget");
 967                         break;
 968                 }
 969
 970                 max_jobs >>= 1;
 971         } while (max_jobs);
 972
 973         if (shm_id == -1)
 974                 return 1;
 975
 976         threads = shmat(shm_id, NULL, 0);
 977         if (threads == (void *) -1) {
 978                 perror("shmat");
 979                 return 1;
 980         }
 981
 982         memset(threads, 0, max_jobs * sizeof(struct thread_data));
 983         hash = (void *) threads + max_jobs * sizeof(struct thread_data);
 984         fio_debug_jobp = (void *) hash + file_hash_size;
 985         *fio_debug_jobp = -1;
 986         file_hash_init(hash);
 987         atexit(free_shm);
 988         return 0;
 989 }
 990
 991 static void usage(const char *name)
 992 {
 993         printf("%s [options] [job options] <job file(s)>\n", name);
 994         printf("\t--debug=options\tEnable debug logging\n");
 995         printf("\t--output\tWrite output to file\n");
 996         printf("\t--timeout\tRuntime in seconds\n");
 997         printf("\t--latency-log\tGenerate per-job latency logs\n");
 998         printf("\t--bandwidth-log\tGenerate per-job bandwidth logs\n");
 999         printf("\t--minimal\tMinimal (terse) output\n");
1000         printf("\t--version\tPrint version info and exit\n");
1001         printf("\t--help\t\tPrint this page\n");
1002         printf("\t--cmdhelp=cmd\tPrint command help, \"all\" for all of"
1003                 " them\n");
1004         printf("\t--showcmd\tTurn a job file into command line options\n");
1005         printf("\t--eta=when\tWhen ETA estimate should be printed\n");
1006         printf("\t          \tMay be \"always\", \"never\" or \"auto\"\n");
1007         printf("\t--readonly\tTurn on safety read-only checks, preventing"
1008                 " writes\n");
1009         printf("\t--section=name\tOnly run specified section in job file\n");
1010         printf("\t--alloc-size=kb\tSet smalloc pool to this size in kb"
1011                 " (def 1024)\n");
1012         printf("\t--warnings-fatal Fio parser warnings are fatal\n");
1013         printf("\nFio was written by Jens Axboe <jens.axboe@oracle.com>");
1014         printf("\n                   Jens Axboe <jaxboe@fusionio.com>\n");
1015 }
1016
1017 #ifdef FIO_INC_DEBUG
1018 struct debug_level debug_levels[] = {
1019         { .name = "process",    .shift = FD_PROCESS, },
1020         { .name = "file",       .shift = FD_FILE, },
1021         { .name = "io",         .shift = FD_IO, },
1022         { .name = "mem",        .shift = FD_MEM, },
1023         { .name = "blktrace",   .shift = FD_BLKTRACE },
1024         { .name = "verify",     .shift = FD_VERIFY },
1025         { .name = "random",     .shift = FD_RANDOM },
1026         { .name = "parse",      .shift = FD_PARSE },
1027         { .name = "diskutil",   .shift = FD_DISKUTIL },
1028         { .name = "job",        .shift = FD_JOB },
1029         { .name = "mutex",      .shift = FD_MUTEX },
1030         { .name = "profile",    .shift = FD_PROFILE },
1031         { .name = "time",       .shift = FD_TIME },
1032         { .name = NULL, },
1033 };
1034
1035 static int set_debug(const char *string)
1036 {
1037         struct debug_level *dl;
1038         char *p = (char *) string;
1039         char *opt;
1040         int i;
1041
1042         if (!strcmp(string, "?") || !strcmp(string, "help")) {
1043                 log_info("fio: dumping debug options:");
1044                 for (i = 0; debug_levels[i].name; i++) {
1045                         dl = &debug_levels[i];
1046                         log_info("%s,", dl->name);
1047                 }
1048                 log_info("all\n");
1049                 return 1;
1050         }
1051
1052         while ((opt = strsep(&p, ",")) != NULL) {
1053                 int found = 0;
1054
1055                 if (!strncmp(opt, "all", 3)) {
1056                         log_info("fio: set all debug options\n");
1057                         fio_debug = ~0UL;
1058                         continue;
1059                 }
1060
1061                 for (i = 0; debug_levels[i].name; i++) {
1062                         dl = &debug_levels[i];
1063                         found = !strncmp(opt, dl->name, strlen(dl->name));
1064                         if (!found)
1065                                 continue;
1066
1067                         if (dl->shift == FD_JOB) {
1068                                 opt = strchr(opt, ':');
1069                                 if (!opt) {
1070                                         log_err("fio: missing job number\n");
1071                                         break;
1072                                 }
1073                                 opt++;
1074                                 fio_debug_jobno = atoi(opt);
1075                                 log_info("fio: set debug jobno %d\n",
1076                                                         fio_debug_jobno);
1077                         } else {
1078                                 log_info("fio: set debug option %s\n", opt);
1079                                 fio_debug |= (1UL << dl->shift);
1080                         }
1081                         break;
1082                 }
1083
1084                 if (!found)
1085                         log_err("fio: debug mask %s not found\n", opt);
1086         }
1087         return 0;
1088 }
1089 #else
1090 static int set_debug(const char *string)
1091 {
1092         log_err("fio: debug tracing not included in build\n");
1093         return 1;
1094 }
1095 #endif
1096
1097 static void fio_options_fill_optstring(void)
1098 {
1099         char *ostr = cmd_optstr;
1100         int i, c;
1101
1102         c = i = 0;
1103         while (l_opts[i].name) {
1104                 ostr[c++] = l_opts[i].val;
1105                 if (l_opts[i].has_arg == required_argument)
1106                         ostr[c++] = ':';
1107                 else if (l_opts[i].has_arg == optional_argument) {
1108                         ostr[c++] = ':';
1109                         ostr[c++] = ':';
1110                 }
1111                 i++;
1112         }
1113         ostr[c] = '\0';
1114 }
1115
1116 static int parse_cmd_line(int argc, char *argv[])
1117 {
1118         struct thread_data *td = NULL;
1119         int c, ini_idx = 0, lidx, ret = 0, do_exit = 0, exit_val = 0;
1120         char *ostr = cmd_optstr;
1121
1122         while ((c = getopt_long_only(argc, argv, ostr, l_opts, &lidx)) != -1) {
1123                 switch (c) {
1124                 case 'a':
1125                         smalloc_pool_size = atoi(optarg);
1126                         break;
1127                 case 't':
1128                         def_timeout = atoi(optarg);
1129                         break;
1130                 case 'l':
1131                         write_lat_log = 1;
1132                         break;
1133                 case 'b':
1134                         write_bw_log = 1;
1135                         break;
1136                 case 'o':
1137                         f_out = fopen(optarg, "w+");
1138                         if (!f_out) {
1139                                 perror("fopen output");
1140                                 exit(1);
1141                         }
1142                         f_err = f_out;
1143                         break;
1144                 case 'm':
1145                         terse_output = 1;
1146                         break;
1147                 case 'h':
1148                         usage(argv[0]);
1149                         exit(0);
1150                 case 'c':
1151                         exit(fio_show_option_help(optarg));
1152                 case 's':
1153                         dump_cmdline = 1;
1154                         break;
1155                 case 'r':
1156                         read_only = 1;
1157                         break;
1158                 case 'v':
1159                         log_info("%s\n", fio_version_string);
1160                         exit(0);
1161                 case 'e':
1162                         if (!strcmp("always", optarg))
1163                                 eta_print = FIO_ETA_ALWAYS;
1164                         else if (!strcmp("never", optarg))
1165                                 eta_print = FIO_ETA_NEVER;
1166                         break;
1167                 case 'd':
1168                         if (set_debug(optarg))
1169                                 do_exit++;
1170                         break;
1171                 case 'x': {
1172                         size_t new_size;
1173
1174                         if (!strcmp(optarg, "global")) {
1175                                 log_err("fio: can't use global as only "
1176                                         "section\n");
1177                                 do_exit++;
1178                                 exit_val = 1;
1179                                 break;
1180                         }
1181                         new_size = (nr_job_sections + 1) * sizeof(char *);
1182                         job_sections = realloc(job_sections, new_size);
1183                         job_sections[nr_job_sections] = strdup(optarg);
1184                         nr_job_sections++;
1185                         break;
1186                         }
1187                 case 'p':
1188                         exec_profile = strdup(optarg);
1189                         break;
1190                 case FIO_GETOPT_JOB: {
1191                         const char *opt = l_opts[lidx].name;
1192                         char *val = optarg;
1193
1194                         if (!strncmp(opt, "name", 4) && td) {
1195                                 ret = add_job(td, td->o.name ?: "fio", 0);
1196                                 if (ret) {
1197                                         put_job(td);
1198                                         return 0;
1199                                 }
1200                                 td = NULL;
1201                         }
1202                         if (!td) {
1203                                 int is_section = !strncmp(opt, "name", 4);
1204                                 int global = 0;
1205
1206                                 if (!is_section || !strncmp(val, "global", 6))
1207                                         global = 1;
1208
1209                                 if (is_section && skip_this_section(val))
1210                                         continue;
1211
1212                                 td = get_new_job(global, &def_thread);
1213                                 if (!td)
1214                                         return 0;
1215                         }
1216
1217                         ret = fio_cmd_option_parse(td, opt, val);
1218                         break;
1219                 }
1220                 case 'w':
1221                         warnings_fatal = 1;
1222                         break;
1223                 default:
1224                         do_exit++;
1225                         exit_val = 1;
1226                         break;
1227                 }
1228         }
1229
1230         if (do_exit)
1231                 exit(exit_val);
1232
1233         if (td) {
1234                 if (!ret)
1235                         ret = add_job(td, td->o.name ?: "fio", 0);
1236                 if (ret)
1237                         put_job(td);
1238         }
1239
1240         while (optind < argc) {
1241                 ini_idx++;
1242                 ini_file = realloc(ini_file, ini_idx * sizeof(char *));
1243                 ini_file[ini_idx - 1] = strdup(argv[optind]);
1244                 optind++;
1245         }
1246
1247         return ini_idx;
1248 }
1249
1250 int parse_options(int argc, char *argv[])
1251 {
1252         int job_files, i;
1253
1254         f_out = stdout;
1255         f_err = stderr;
1256
1257         fio_options_fill_optstring();
1258         fio_options_dup_and_init(l_opts);
1259
1260         if (setup_thread_area())
1261                 return 1;
1262         if (fill_def_thread())
1263                 return 1;
1264
1265         job_files = parse_cmd_line(argc, argv);
1266
1267         for (i = 0; i < job_files; i++) {
1268                 if (fill_def_thread())
1269                         return 1;
1270                 if (parse_jobs_ini(ini_file[i], i))
1271                         return 1;
1272                 free(ini_file[i]);
1273         }
1274
1275         free(ini_file);
1276         options_mem_free(&def_thread);
1277
1278         if (!thread_number) {
1279                 if (dump_cmdline)
1280                         return 0;
1281                 if (exec_profile)
1282                         return 0;
1283
1284                 log_err("No jobs(s) defined\n\n");
1285                 usage(argv[0]);
1286                 return 1;
1287         }
1288
1289         if (def_thread.o.gtod_offload) {
1290                 fio_gtod_init();
1291                 fio_gtod_offload = 1;
1292                 fio_gtod_cpu = def_thread.o.gtod_cpu;
1293         }
1294
1295         log_info("%s\n", fio_version_string);
1296         return 0;
1297 }