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 1.43.2";
  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_section = NULL;
  43 char *exec_profile = NULL;
  44
  45 int write_bw_log = 0;
  46 int read_only = 0;
  47
  48 static int def_timeout;
  49 static int write_lat_log;
  50
  51 static int prev_group_jobs;
  52
  53 unsigned long fio_debug = 0;
  54 unsigned int fio_debug_jobno = -1;
  55 unsigned int *fio_debug_jobp = NULL;
  56
  57 /*
  58  * Command line options. These will contain the above, plus a few
  59  * extra that only pertain to fio itself and not jobs.
  60  */
  61 static struct option l_opts[FIO_NR_OPTIONS] = {
  62         {
  63                 .name           = "output",
  64                 .has_arg        = required_argument,
  65                 .val            = 'o',
  66         },
  67         {
  68                 .name           = "timeout",
  69                 .has_arg        = required_argument,
  70                 .val            = 't',
  71         },
  72         {
  73                 .name           = "latency-log",
  74                 .has_arg        = required_argument,
  75                 .val            = 'l',
  76         },
  77         {
  78                 .name           = "bandwidth-log",
  79                 .has_arg        = required_argument,
  80                 .val            = 'b',
  81         },
  82         {
  83                 .name           = "minimal",
  84                 .has_arg        = optional_argument,
  85                 .val            = 'm',
  86         },
  87         {
  88                 .name           = "version",
  89                 .has_arg        = no_argument,
  90                 .val            = 'v',
  91         },
  92         {
  93                 .name           = "help",
  94                 .has_arg        = no_argument,
  95                 .val            = 'h',
  96         },
  97         {
  98                 .name           = "cmdhelp",
  99                 .has_arg        = optional_argument,
 100                 .val            = 'c',
 101         },
 102         {
 103                 .name           = "showcmd",
 104                 .has_arg        = no_argument,
 105                 .val            = 's',
 106         },
 107         {
 108                 .name           = "readonly",
 109                 .has_arg        = no_argument,
 110                 .val            = 'r',
 111         },
 112         {
 113                 .name           = "eta",
 114                 .has_arg        = required_argument,
 115                 .val            = 'e',
 116         },
 117         {
 118                 .name           = "debug",
 119                 .has_arg        = required_argument,
 120                 .val            = 'd',
 121         },
 122         {
 123                 .name           = "section",
 124                 .has_arg        = required_argument,
 125                 .val            = 'x',
 126         },
 127         {
 128                 .name           = "alloc-size",
 129                 .has_arg        = required_argument,
 130                 .val            = 'a',
 131         },
 132         {
 133                 .name           = "profile",
 134                 .has_arg        = required_argument,
 135                 .val            = 'p',
 136         },
 137         {
 138                 .name           = NULL,
 139         },
 140 };
 141
 142 FILE *get_f_out()
 143 {
 144         return f_out;
 145 }
 146
 147 FILE *get_f_err()
 148 {
 149         return f_err;
 150 }
 151
 152 /*
 153  * Return a free job structure.
 154  */
 155 static struct thread_data *get_new_job(int global, struct thread_data *parent)
 156 {
 157         struct thread_data *td;
 158
 159         if (global)
 160                 return &def_thread;
 161         if (thread_number >= max_jobs)
 162                 return NULL;
 163
 164         td = &threads[thread_number++];
 165         *td = *parent;
 166
 167         td->o.uid = td->o.gid = -1U;
 168
 169         dup_files(td, parent);
 170         options_mem_dupe(td);
 171
 172         profile_add_hooks(td);
 173
 174         td->thread_number = thread_number;
 175         return td;
 176 }
 177
 178 static void put_job(struct thread_data *td)
 179 {
 180         if (td == &def_thread)
 181                 return;
 182
 183         profile_td_exit(td);
 184
 185         if (td->error)
 186                 log_info("fio: %s\n", td->verror);
 187
 188         memset(&threads[td->thread_number - 1], 0, sizeof(*td));
 189         thread_number--;
 190 }
 191
 192 static int __setup_rate(struct thread_data *td, enum fio_ddir ddir)
 193 {
 194         unsigned int bs = td->o.min_bs[ddir];
 195         unsigned long long bytes_per_sec;
 196
 197         assert(ddir_rw(ddir));
 198
 199         if (td->o.rate[ddir])
 200                 bytes_per_sec = td->o.rate[ddir];
 201         else
 202                 bytes_per_sec = td->o.rate_iops[ddir] * bs;
 203
 204         if (!bytes_per_sec) {
 205                 log_err("rate lower than supported\n");
 206                 return -1;
 207         }
 208
 209         td->rate_nsec_cycle[ddir] = 1000000000ULL / bytes_per_sec;
 210         td->rate_pending_usleep[ddir] = 0;
 211         return 0;
 212 }
 213
 214 static int setup_rate(struct thread_data *td)
 215 {
 216         int ret = 0;
 217
 218         if (td->o.rate[DDIR_READ] || td->o.rate_iops[DDIR_READ])
 219                 ret = __setup_rate(td, DDIR_READ);
 220         if (td->o.rate[DDIR_WRITE] || td->o.rate_iops[DDIR_WRITE])
 221                 ret |= __setup_rate(td, DDIR_WRITE);
 222
 223         return ret;
 224 }
 225
 226 static int fixed_block_size(struct thread_options *o)
 227 {
 228         return o->min_bs[DDIR_READ] == o->max_bs[DDIR_READ] &&
 229                 o->min_bs[DDIR_WRITE] == o->max_bs[DDIR_WRITE] &&
 230                 o->min_bs[DDIR_READ] == o->min_bs[DDIR_WRITE];
 231 }
 232
 233 /*
 234  * Lazy way of fixing up options that depend on each other. We could also
 235  * define option callback handlers, but this is easier.
 236  */
 237 static int fixup_options(struct thread_data *td)
 238 {
 239         struct thread_options *o = &td->o;
 240
 241 #ifndef FIO_HAVE_PSHARED_MUTEX
 242         if (!o->use_thread) {
 243                 log_info("fio: this platform does not support process shared"
 244                          " mutexes, forcing use of threads. Use the 'thread'"
 245                          " option to get rid of this warning.\n");
 246                 o->use_thread = 1;
 247         }
 248 #endif
 249
 250         if (o->write_iolog_file && o->read_iolog_file) {
 251                 log_err("fio: read iolog overrides write_iolog\n");
 252                 free(o->write_iolog_file);
 253                 o->write_iolog_file = NULL;
 254         }
 255
 256         /*
 257          * only really works for sequential io for now, and with 1 file
 258          */
 259         if (o->zone_size && td_random(td) && o->open_files == 1)
 260                 o->zone_size = 0;
 261
 262         /*
 263          * Reads can do overwrites, we always need to pre-create the file
 264          */
 265         if (td_read(td) || td_rw(td))
 266                 o->overwrite = 1;
 267
 268         if (!o->min_bs[DDIR_READ])
 269                 o->min_bs[DDIR_READ] = o->bs[DDIR_READ];
 270         if (!o->max_bs[DDIR_READ])
 271                 o->max_bs[DDIR_READ] = o->bs[DDIR_READ];
 272         if (!o->min_bs[DDIR_WRITE])
 273                 o->min_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 274         if (!o->max_bs[DDIR_WRITE])
 275                 o->max_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 276
 277         o->rw_min_bs = min(o->min_bs[DDIR_READ], o->min_bs[DDIR_WRITE]);
 278
 279         /*
 280          * For random IO, allow blockalign offset other than min_bs.
 281          */
 282         if (!o->ba[DDIR_READ] || !td_random(td))
 283                 o->ba[DDIR_READ] = o->min_bs[DDIR_READ];
 284         if (!o->ba[DDIR_WRITE] || !td_random(td))
 285                 o->ba[DDIR_WRITE] = o->min_bs[DDIR_WRITE];
 286
 287         if ((o->ba[DDIR_READ] != o->min_bs[DDIR_READ] ||
 288             o->ba[DDIR_WRITE] != o->min_bs[DDIR_WRITE]) &&
 289             !o->norandommap) {
 290                 log_err("fio: Any use of blockalign= turns off randommap\n");
 291                 o->norandommap = 1;
 292         }
 293
 294         if (!o->file_size_high)
 295                 o->file_size_high = o->file_size_low;
 296
 297         if (o->norandommap && o->verify != VERIFY_NONE
 298             && !fixed_block_size(o))  {
 299                 log_err("fio: norandommap given for variable block sizes, "
 300                         "verify disabled\n");
 301                 o->verify = VERIFY_NONE;
 302         }
 303         if (o->bs_unaligned && (o->odirect || td->io_ops->flags & FIO_RAWIO))
 304                 log_err("fio: bs_unaligned may not work with raw io\n");
 305
 306         /*
 307          * thinktime_spin must be less than thinktime
 308          */
 309         if (o->thinktime_spin > o->thinktime)
 310                 o->thinktime_spin = o->thinktime;
 311
 312         /*
 313          * The low water mark cannot be bigger than the iodepth
 314          */
 315         if (o->iodepth_low > o->iodepth || !o->iodepth_low) {
 316                 /*
 317                  * syslet work around - if the workload is sequential,
 318                  * we want to let the queue drain all the way down to
 319                  * avoid seeking between async threads
 320                  */
 321                 if (!strcmp(td->io_ops->name, "syslet-rw") && !td_random(td))
 322                         o->iodepth_low = 1;
 323                 else
 324                         o->iodepth_low = o->iodepth;
 325         }
 326
 327         /*
 328          * If batch number isn't set, default to the same as iodepth
 329          */
 330         if (o->iodepth_batch > o->iodepth || !o->iodepth_batch)
 331                 o->iodepth_batch = o->iodepth;
 332
 333         if (o->nr_files > td->files_index)
 334                 o->nr_files = td->files_index;
 335
 336         if (o->open_files > o->nr_files || !o->open_files)
 337                 o->open_files = o->nr_files;
 338
 339         if (((o->rate[0] + o->rate[1]) && (o->rate_iops[0] + o->rate_iops[1]))||
 340             ((o->ratemin[0] + o->ratemin[1]) && (o->rate_iops_min[0] +
 341                 o->rate_iops_min[1]))) {
 342                 log_err("fio: rate and rate_iops are mutually exclusive\n");
 343                 return 1;
 344         }
 345         if ((o->rate[0] < o->ratemin[0]) || (o->rate[1] < o->ratemin[1]) ||
 346             (o->rate_iops[0] < o->rate_iops_min[0]) ||
 347             (o->rate_iops[1] < o->rate_iops_min[1])) {
 348                 log_err("fio: minimum rate exceeds rate\n");
 349                 return 1;
 350         }
 351
 352         if (!o->timeout && o->time_based) {
 353                 log_err("fio: time_based requires a runtime/timeout setting\n");
 354                 o->time_based = 0;
 355         }
 356
 357         if (o->fill_device && !o->size)
 358                 o->size = -1ULL;
 359
 360         if (td_rw(td) && o->verify != VERIFY_NONE)
 361                 log_info("fio: mixed read/write workload with verify. May not "
 362                  "work as expected, unless you pre-populated the file\n");
 363
 364         if (o->verify != VERIFY_NONE) {
 365                 o->refill_buffers = 1;
 366                 if (o->max_bs[DDIR_WRITE] != o->min_bs[DDIR_WRITE] &&
 367                     !o->verify_interval)
 368                         o->verify_interval = o->min_bs[DDIR_WRITE];
 369         }
 370
 371         if (o->pre_read) {
 372                 o->invalidate_cache = 0;
 373                 if (td->io_ops->flags & FIO_PIPEIO)
 374                         log_info("fio: cannot pre-read files with an IO engine"
 375                                  " that isn't seekable. Pre-read disabled.\n");
 376         }
 377
 378 #ifndef FIO_HAVE_FDATASYNC
 379         if (o->fdatasync_blocks) {
 380                 log_info("fio: this platform does not support fdatasync()"
 381                          " falling back to using fsync().  Use the 'fsync'"
 382                          " option instead of 'fdatasync' to get rid of"
 383                          " this warning\n");
 384                 o->fsync_blocks = o->fdatasync_blocks;
 385                 o->fdatasync_blocks = 0;
 386         }
 387 #endif
 388
 389         return 0;
 390 }
 391
 392 /*
 393  * This function leaks the buffer
 394  */
 395 static char *to_kmg(unsigned int val)
 396 {
 397         char *buf = malloc(32);
 398         char post[] = { 0, 'K', 'M', 'G', 'P', 'E', 0 };
 399         char *p = post;
 400
 401         do {
 402                 if (val & 1023)
 403                         break;
 404
 405                 val >>= 10;
 406                 p++;
 407         } while (*p);
 408
 409         snprintf(buf, 31, "%u%c", val, *p);
 410         return buf;
 411 }
 412
 413 /* External engines are specified by "external:name.o") */
 414 static const char *get_engine_name(const char *str)
 415 {
 416         char *p = strstr(str, ":");
 417
 418         if (!p)
 419                 return str;
 420
 421         p++;
 422         strip_blank_front(&p);
 423         strip_blank_end(p);
 424         return p;
 425 }
 426
 427 static int exists_and_not_file(const char *filename)
 428 {
 429         struct stat sb;
 430
 431         if (lstat(filename, &sb) == -1)
 432                 return 0;
 433
 434         if (S_ISREG(sb.st_mode))
 435                 return 0;
 436
 437         return 1;
 438 }
 439
 440 void td_fill_rand_seeds(struct thread_data *td)
 441 {
 442         os_random_seed(td->rand_seeds[0], &td->bsrange_state);
 443         os_random_seed(td->rand_seeds[1], &td->verify_state);
 444         os_random_seed(td->rand_seeds[2], &td->rwmix_state);
 445
 446         if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
 447                 os_random_seed(td->rand_seeds[3], &td->next_file_state);
 448
 449         os_random_seed(td->rand_seeds[5], &td->file_size_state);
 450         os_random_seed(td->rand_seeds[6], &td->trim_state);
 451
 452         if (!td_random(td))
 453                 return;
 454
 455         if (td->o.rand_repeatable)
 456                 td->rand_seeds[4] = FIO_RANDSEED * td->thread_number;
 457
 458         os_random_seed(td->rand_seeds[4], &td->random_state);
 459 }
 460
 461 /*
 462  * Initialize the various random states we need (random io, block size ranges,
 463  * read/write mix, etc).
 464  */
 465 static int init_random_state(struct thread_data *td)
 466 {
 467         int fd;
 468
 469         fd = open("/dev/urandom", O_RDONLY);
 470         if (fd == -1) {
 471                 td_verror(td, errno, "open");
 472                 return 1;
 473         }
 474
 475         if (read(fd, td->rand_seeds, sizeof(td->rand_seeds)) <
 476             (int) sizeof(td->rand_seeds)) {
 477                 td_verror(td, EIO, "read");
 478                 close(fd);
 479                 return 1;
 480         }
 481
 482         close(fd);
 483         td_fill_rand_seeds(td);
 484         return 0;
 485 }
 486
 487 /*
 488  * Adds a job to the list of things todo. Sanitizes the various options
 489  * to make sure we don't have conflicts, and initializes various
 490  * members of td.
 491  */
 492 static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
 493 {
 494         const char *ddir_str[] = { NULL, "read", "write", "rw", NULL,
 495                                    "randread", "randwrite", "randrw" };
 496         unsigned int i;
 497         const char *engine;
 498         char fname[PATH_MAX];
 499         int numjobs, file_alloced;
 500
 501         /*
 502          * the def_thread is just for options, it's not a real job
 503          */
 504         if (td == &def_thread)
 505                 return 0;
 506
 507         /*
 508          * if we are just dumping the output command line, don't add the job
 509          */
 510         if (dump_cmdline) {
 511                 put_job(td);
 512                 return 0;
 513         }
 514
 515         if (profile_td_init(td))
 516                 return 1;
 517
 518         engine = get_engine_name(td->o.ioengine);
 519         td->io_ops = load_ioengine(td, engine);
 520         if (!td->io_ops) {
 521                 log_err("fio: failed to load engine %s\n", engine);
 522                 goto err;
 523         }
 524
 525         if (td->o.use_thread)
 526                 nr_thread++;
 527         else
 528                 nr_process++;
 529
 530         if (td->o.odirect)
 531                 td->io_ops->flags |= FIO_RAWIO;
 532
 533         file_alloced = 0;
 534         if (!td->o.filename && !td->files_index && !td->o.read_iolog_file) {
 535                 file_alloced = 1;
 536
 537                 if (td->o.nr_files == 1 && exists_and_not_file(jobname))
 538                         add_file(td, jobname);
 539                 else {
 540                         for (i = 0; i < td->o.nr_files; i++) {
 541                                 sprintf(fname, "%s.%d.%d", jobname,
 542                                                         td->thread_number, i);
 543                                 add_file(td, fname);
 544                         }
 545                 }
 546         }
 547
 548         if (fixup_options(td))
 549                 goto err;
 550
 551         if (td->io_ops->flags & FIO_DISKLESSIO) {
 552                 struct fio_file *f;
 553
 554                 for_each_file(td, f, i)
 555                         f->real_file_size = -1ULL;
 556         }
 557
 558         td->mutex = fio_mutex_init(0);
 559
 560         td->ts.clat_stat[0].min_val = td->ts.clat_stat[1].min_val = ULONG_MAX;
 561         td->ts.slat_stat[0].min_val = td->ts.slat_stat[1].min_val = ULONG_MAX;
 562         td->ts.lat_stat[0].min_val = td->ts.lat_stat[1].min_val = ULONG_MAX;
 563         td->ts.bw_stat[0].min_val = td->ts.bw_stat[1].min_val = ULONG_MAX;
 564         td->ddir_seq_nr = td->o.ddir_seq_nr + 1;
 565
 566         if ((td->o.stonewall || td->o.new_group) && prev_group_jobs) {
 567                 prev_group_jobs = 0;
 568                 groupid++;
 569         }
 570
 571         td->groupid = groupid;
 572         prev_group_jobs++;
 573
 574         if (init_random_state(td))
 575                 goto err;
 576
 577         if (setup_rate(td))
 578                 goto err;
 579
 580         if (td->o.write_lat_log) {
 581                 setup_log(&td->ts.lat_log);
 582                 setup_log(&td->ts.slat_log);
 583                 setup_log(&td->ts.clat_log);
 584         }
 585         if (td->o.write_bw_log)
 586                 setup_log(&td->ts.bw_log);
 587
 588         if (!td->o.name)
 589                 td->o.name = strdup(jobname);
 590
 591         if (!terse_output) {
 592                 if (!job_add_num) {
 593                         if (!strcmp(td->io_ops->name, "cpuio")) {
 594                                 log_info("%s: ioengine=cpu, cpuload=%u,"
 595                                          " cpucycle=%u\n", td->o.name,
 596                                                         td->o.cpuload,
 597                                                         td->o.cpucycle);
 598                         } else {
 599                                 char *c1, *c2, *c3, *c4;
 600
 601                                 c1 = to_kmg(td->o.min_bs[DDIR_READ]);
 602                                 c2 = to_kmg(td->o.max_bs[DDIR_READ]);
 603                                 c3 = to_kmg(td->o.min_bs[DDIR_WRITE]);
 604                                 c4 = to_kmg(td->o.max_bs[DDIR_WRITE]);
 605
 606                                 log_info("%s: (g=%d): rw=%s, bs=%s-%s/%s-%s,"
 607                                          " ioengine=%s, iodepth=%u\n",
 608                                                 td->o.name, td->groupid,
 609                                                 ddir_str[td->o.td_ddir],
 610                                                 c1, c2, c3, c4,
 611                                                 td->io_ops->name,
 612                                                 td->o.iodepth);
 613
 614                                 free(c1);
 615                                 free(c2);
 616                                 free(c3);
 617                                 free(c4);
 618                         }
 619                 } else if (job_add_num == 1)
 620                         log_info("...\n");
 621         }
 622
 623         /*
 624          * recurse add identical jobs, clear numjobs and stonewall options
 625          * as they don't apply to sub-jobs
 626          */
 627         numjobs = td->o.numjobs;
 628         while (--numjobs) {
 629                 struct thread_data *td_new = get_new_job(0, td);
 630
 631                 if (!td_new)
 632                         goto err;
 633
 634                 td_new->o.numjobs = 1;
 635                 td_new->o.stonewall = 0;
 636                 td_new->o.new_group = 0;
 637
 638                 if (file_alloced) {
 639                         td_new->o.filename = NULL;
 640                         td_new->files_index = 0;
 641                         td_new->files_size = 0;
 642                         td_new->files = NULL;
 643                 }
 644
 645                 job_add_num = numjobs - 1;
 646
 647                 if (add_job(td_new, jobname, job_add_num))
 648                         goto err;
 649         }
 650
 651         return 0;
 652 err:
 653         put_job(td);
 654         return -1;
 655 }
 656
 657 /*
 658  * Parse as if 'o' was a command line
 659  */
 660 void add_job_opts(const char **o)
 661 {
 662         struct thread_data *td, *td_parent;
 663         int i, in_global = 1;
 664         char jobname[32];
 665
 666         i = 0;
 667         td_parent = td = NULL;
 668         while (o[i]) {
 669                 if (!strncmp(o[i], "name", 4)) {
 670                         in_global = 0;
 671                         if (td)
 672                                 add_job(td, jobname, 0);
 673                         td = NULL;
 674                         sprintf(jobname, "%s", o[i] + 5);
 675                 }
 676                 if (in_global && !td_parent)
 677                         td_parent = get_new_job(1, &def_thread);
 678                 else if (!in_global && !td) {
 679                         if (!td_parent)
 680                                 td_parent = &def_thread;
 681                         td = get_new_job(0, td_parent);
 682                 }
 683                 if (in_global)
 684                         fio_options_parse(td_parent, (char **) &o[i], 1);
 685                 else
 686                         fio_options_parse(td, (char **) &o[i], 1);
 687                 i++;
 688         }
 689
 690         if (td)
 691                 add_job(td, jobname, 0);
 692 }
 693
 694 static int skip_this_section(const char *name)
 695 {
 696         if (!job_section)
 697                 return 0;
 698         if (!strncmp(name, "global", 6))
 699                 return 0;
 700
 701         return strcmp(job_section, name);
 702 }
 703
 704 static int is_empty_or_comment(char *line)
 705 {
 706         unsigned int i;
 707
 708         for (i = 0; i < strlen(line); i++) {
 709                 if (line[i] == ';')
 710                         return 1;
 711                 if (line[i] == '#')
 712                         return 1;
 713                 if (!isspace(line[i]) && !iscntrl(line[i]))
 714                         return 0;
 715         }
 716
 717         return 1;
 718 }
 719
 720 /*
 721  * This is our [ini] type file parser.
 722  */
 723 static int parse_jobs_ini(char *file, int stonewall_flag)
 724 {
 725         unsigned int global;
 726         struct thread_data *td;
 727         char *string, *name;
 728         FILE *f;
 729         char *p;
 730         int ret = 0, stonewall;
 731         int first_sect = 1;
 732         int skip_fgets = 0;
 733         int inside_skip = 0;
 734         char **opts;
 735         int i, alloc_opts, num_opts;
 736
 737         if (!strcmp(file, "-"))
 738                 f = stdin;
 739         else
 740                 f = fopen(file, "r");
 741
 742         if (!f) {
 743                 perror("fopen job file");
 744                 return 1;
 745         }
 746
 747         string = malloc(4096);
 748
 749         /*
 750          * it's really 256 + small bit, 280 should suffice
 751          */
 752         name = malloc(280);
 753         memset(name, 0, 280);
 754
 755         alloc_opts = 8;
 756         opts = malloc(sizeof(char *) * alloc_opts);
 757         num_opts = 0;
 758
 759         stonewall = stonewall_flag;
 760         do {
 761                 /*
 762                  * if skip_fgets is set, we already have loaded a line we
 763                  * haven't handled.
 764                  */
 765                 if (!skip_fgets) {
 766                         p = fgets(string, 4095, f);
 767                         if (!p)
 768                                 break;
 769                 }
 770
 771                 skip_fgets = 0;
 772                 strip_blank_front(&p);
 773                 strip_blank_end(p);
 774
 775                 if (is_empty_or_comment(p))
 776                         continue;
 777                 if (sscanf(p, "[%255s]", name) != 1) {
 778                         if (inside_skip)
 779                                 continue;
 780                         log_err("fio: option <%s> outside of [] job section\n",
 781                                                                         p);
 782                         break;
 783                 }
 784
 785                 name[strlen(name) - 1] = '\0';
 786
 787                 if (skip_this_section(name)) {
 788                         inside_skip = 1;
 789                         continue;
 790                 } else
 791                         inside_skip = 0;
 792
 793                 global = !strncmp(name, "global", 6);
 794
 795                 if (dump_cmdline) {
 796                         if (first_sect)
 797                                 log_info("fio ");
 798                         if (!global)
 799                                 log_info("--name=%s ", name);
 800                         first_sect = 0;
 801                 }
 802
 803                 td = get_new_job(global, &def_thread);
 804                 if (!td) {
 805                         ret = 1;
 806                         break;
 807                 }
 808
 809                 /*
 810                  * Seperate multiple job files by a stonewall
 811                  */
 812                 if (!global && stonewall) {
 813                         td->o.stonewall = stonewall;
 814                         stonewall = 0;
 815                 }
 816
 817                 num_opts = 0;
 818                 memset(opts, 0, alloc_opts * sizeof(char *));
 819
 820                 while ((p = fgets(string, 4096, f)) != NULL) {
 821                         if (is_empty_or_comment(p))
 822                                 continue;
 823
 824                         strip_blank_front(&p);
 825
 826                         /*
 827                          * new section, break out and make sure we don't
 828                          * fgets() a new line at the top.
 829                          */
 830                         if (p[0] == '[') {
 831                                 skip_fgets = 1;
 832                                 break;
 833                         }
 834
 835                         strip_blank_end(p);
 836
 837                         if (num_opts == alloc_opts) {
 838                                 alloc_opts <<= 1;
 839                                 opts = realloc(opts,
 840                                                 alloc_opts * sizeof(char *));
 841                         }
 842
 843                         opts[num_opts] = strdup(p);
 844                         num_opts++;
 845                 }
 846
 847                 ret = fio_options_parse(td, opts, num_opts);
 848                 if (!ret) {
 849                         if (dump_cmdline)
 850                                 for (i = 0; i < num_opts; i++)
 851                                         log_info("--%s ", opts[i]);
 852
 853                         ret = add_job(td, name, 0);
 854                 } else {
 855                         log_err("fio: job %s dropped\n", name);
 856                         put_job(td);
 857                 }
 858
 859                 for (i = 0; i < num_opts; i++)
 860                         free(opts[i]);
 861                 num_opts = 0;
 862         } while (!ret);
 863
 864         if (dump_cmdline)
 865                 log_info("\n");
 866
 867         for (i = 0; i < num_opts; i++)
 868                 free(opts[i]);
 869
 870         free(string);
 871         free(name);
 872         free(opts);
 873         if (f != stdin)
 874                 fclose(f);
 875         return ret;
 876 }
 877
 878 static int fill_def_thread(void)
 879 {
 880         memset(&def_thread, 0, sizeof(def_thread));
 881
 882         fio_getaffinity(getpid(), &def_thread.o.cpumask);
 883
 884         /*
 885          * fill default options
 886          */
 887         fio_fill_default_options(&def_thread);
 888
 889         def_thread.o.timeout = def_timeout;
 890         return 0;
 891 }
 892
 893 static void free_shm(void)
 894 {
 895         struct shmid_ds sbuf;
 896
 897         if (threads) {
 898                 void *tp = threads;
 899
 900                 threads = NULL;
 901                 file_hash_exit();
 902                 fio_debug_jobp = NULL;
 903                 shmdt(tp);
 904                 shmctl(shm_id, IPC_RMID, &sbuf);
 905         }
 906
 907         scleanup();
 908 }
 909
 910 /*
 911  * The thread area is shared between the main process and the job
 912  * threads/processes. So setup a shared memory segment that will hold
 913  * all the job info. We use the end of the region for keeping track of
 914  * open files across jobs, for file sharing.
 915  */
 916 static int setup_thread_area(void)
 917 {
 918         void *hash;
 919
 920         /*
 921          * 1024 is too much on some machines, scale max_jobs if
 922          * we get a failure that looks like too large a shm segment
 923          */
 924         do {
 925                 size_t size = max_jobs * sizeof(struct thread_data);
 926
 927                 size += file_hash_size;
 928                 size += sizeof(unsigned int);
 929
 930                 shm_id = shmget(0, size, IPC_CREAT | 0600);
 931                 if (shm_id != -1)
 932                         break;
 933                 if (errno != EINVAL) {
 934                         perror("shmget");
 935                         break;
 936                 }
 937
 938                 max_jobs >>= 1;
 939         } while (max_jobs);
 940
 941         if (shm_id == -1)
 942                 return 1;
 943
 944         threads = shmat(shm_id, NULL, 0);
 945         if (threads == (void *) -1) {
 946                 perror("shmat");
 947                 return 1;
 948         }
 949
 950         memset(threads, 0, max_jobs * sizeof(struct thread_data));
 951         hash = (void *) threads + max_jobs * sizeof(struct thread_data);
 952         fio_debug_jobp = (void *) hash + file_hash_size;
 953         *fio_debug_jobp = -1;
 954         file_hash_init(hash);
 955         atexit(free_shm);
 956         return 0;
 957 }
 958
 959 static void usage(const char *name)
 960 {
 961         printf("%s\n", fio_version_string);
 962         printf("%s [options] [job options] <job file(s)>\n", name);
 963         printf("\t--debug=options\tEnable debug logging\n");
 964         printf("\t--output\tWrite output to file\n");
 965         printf("\t--timeout\tRuntime in seconds\n");
 966         printf("\t--latency-log\tGenerate per-job latency logs\n");
 967         printf("\t--bandwidth-log\tGenerate per-job bandwidth logs\n");
 968         printf("\t--minimal\tMinimal (terse) output\n");
 969         printf("\t--version\tPrint version info and exit\n");
 970         printf("\t--help\t\tPrint this page\n");
 971         printf("\t--cmdhelp=cmd\tPrint command help, \"all\" for all of"
 972                 " them\n");
 973         printf("\t--showcmd\tTurn a job file into command line options\n");
 974         printf("\t--eta=when\tWhen ETA estimate should be printed\n");
 975         printf("\t          \tMay be \"always\", \"never\" or \"auto\"\n");
 976         printf("\t--readonly\tTurn on safety read-only checks, preventing"
 977                 " writes\n");
 978         printf("\t--section=name\tOnly run specified section in job file\n");
 979         printf("\t--alloc-size=kb\tSet smalloc pool to this size in kb"
 980                 " (def 1024)\n");
 981         printf("\nFio was written by Jens Axboe <jens.axboe@oracle.com>");
 982         printf("\n                   Jens Axboe <jaxboe@fusionio.com>\n");
 983 }
 984
 985 #ifdef FIO_INC_DEBUG
 986 struct debug_level debug_levels[] = {
 987         { .name = "process",    .shift = FD_PROCESS, },
 988         { .name = "file",       .shift = FD_FILE, },
 989         { .name = "io",         .shift = FD_IO, },
 990         { .name = "mem",        .shift = FD_MEM, },
 991         { .name = "blktrace",   .shift = FD_BLKTRACE },
 992         { .name = "verify",     .shift = FD_VERIFY },
 993         { .name = "random",     .shift = FD_RANDOM },
 994         { .name = "parse",      .shift = FD_PARSE },
 995         { .name = "diskutil",   .shift = FD_DISKUTIL },
 996         { .name = "job",        .shift = FD_JOB },
 997         { .name = "mutex",      .shift = FD_MUTEX },
 998         { .name = "profile",    .shift = FD_PROFILE },
 999         { .name = "time",       .shift = FD_TIME },
1000         { .name = NULL, },
1001 };
1002
1003 static int set_debug(const char *string)
1004 {
1005         struct debug_level *dl;
1006         char *p = (char *) string;
1007         char *opt;
1008         int i;
1009
1010         if (!strcmp(string, "?") || !strcmp(string, "help")) {
1011                 int i;
1012
1013                 log_info("fio: dumping debug options:");
1014                 for (i = 0; debug_levels[i].name; i++) {
1015                         dl = &debug_levels[i];
1016                         log_info("%s,", dl->name);
1017                 }
1018                 log_info("all\n");
1019                 return 1;
1020         }
1021
1022         while ((opt = strsep(&p, ",")) != NULL) {
1023                 int found = 0;
1024
1025                 if (!strncmp(opt, "all", 3)) {
1026                         log_info("fio: set all debug options\n");
1027                         fio_debug = ~0UL;
1028                         continue;
1029                 }
1030
1031                 for (i = 0; debug_levels[i].name; i++) {
1032                         dl = &debug_levels[i];
1033                         found = !strncmp(opt, dl->name, strlen(dl->name));
1034                         if (!found)
1035                                 continue;
1036
1037                         if (dl->shift == FD_JOB) {
1038                                 opt = strchr(opt, ':');
1039                                 if (!opt) {
1040                                         log_err("fio: missing job number\n");
1041                                         break;
1042                                 }
1043                                 opt++;
1044                                 fio_debug_jobno = atoi(opt);
1045                                 log_info("fio: set debug jobno %d\n",
1046                                                         fio_debug_jobno);
1047                         } else {
1048                                 log_info("fio: set debug option %s\n", opt);
1049                                 fio_debug |= (1UL << dl->shift);
1050                         }
1051                         break;
1052                 }
1053
1054                 if (!found)
1055                         log_err("fio: debug mask %s not found\n", opt);
1056         }
1057         return 0;
1058 }
1059 #else
1060 static int set_debug(const char *string)
1061 {
1062         log_err("fio: debug tracing not included in build\n");
1063         return 1;
1064 }
1065 #endif
1066
1067 static int parse_cmd_line(int argc, char *argv[])
1068 {
1069         struct thread_data *td = NULL;
1070         int c, ini_idx = 0, lidx, ret = 0, do_exit = 0, exit_val = 0;
1071
1072         while ((c = getopt_long_only(argc, argv, "", l_opts, &lidx)) != -1) {
1073                 switch (c) {
1074                 case 'a':
1075                         smalloc_pool_size = atoi(optarg);
1076                         break;
1077                 case 't':
1078                         def_timeout = atoi(optarg);
1079                         break;
1080                 case 'l':
1081                         write_lat_log = 1;
1082                         break;
1083                 case 'b':
1084                         write_bw_log = 1;
1085                         break;
1086                 case 'o':
1087                         f_out = fopen(optarg, "w+");
1088                         if (!f_out) {
1089                                 perror("fopen output");
1090                                 exit(1);
1091                         }
1092                         f_err = f_out;
1093                         break;
1094                 case 'm':
1095                         terse_output = 1;
1096                         break;
1097                 case 'h':
1098                         usage(argv[0]);
1099                         exit(0);
1100                 case 'c':
1101                         exit(fio_show_option_help(optarg));
1102                 case 's':
1103                         dump_cmdline = 1;
1104                         break;
1105                 case 'r':
1106                         read_only = 1;
1107                         break;
1108                 case 'v':
1109                         printf("%s\n", fio_version_string);
1110                         exit(0);
1111                 case 'e':
1112                         if (!strcmp("always", optarg))
1113                                 eta_print = FIO_ETA_ALWAYS;
1114                         else if (!strcmp("never", optarg))
1115                                 eta_print = FIO_ETA_NEVER;
1116                         break;
1117                 case 'd':
1118                         if (set_debug(optarg))
1119                                 do_exit++;
1120                         break;
1121                 case 'x':
1122                         if (!strcmp(optarg, "global")) {
1123                                 log_err("fio: can't use global as only "
1124                                         "section\n");
1125                                 do_exit++;
1126                                 exit_val = 1;
1127                                 break;
1128                         }
1129                         if (job_section)
1130                                 free(job_section);
1131                         job_section = strdup(optarg);
1132                         break;
1133                 case 'p':
1134                         exec_profile = strdup(optarg);
1135                         break;
1136                 case FIO_GETOPT_JOB: {
1137                         const char *opt = l_opts[lidx].name;
1138                         char *val = optarg;
1139
1140                         if (!strncmp(opt, "name", 4) && td) {
1141                                 ret = add_job(td, td->o.name ?: "fio", 0);
1142                                 if (ret) {
1143                                         put_job(td);
1144                                         return 0;
1145                                 }
1146                                 td = NULL;
1147                         }
1148                         if (!td) {
1149                                 int is_section = !strncmp(opt, "name", 4);
1150                                 int global = 0;
1151
1152                                 if (!is_section || !strncmp(val, "global", 6))
1153                                         global = 1;
1154
1155                                 if (is_section && skip_this_section(val))
1156                                         continue;
1157
1158                                 td = get_new_job(global, &def_thread);
1159                                 if (!td)
1160                                         return 0;
1161                         }
1162
1163                         ret = fio_cmd_option_parse(td, opt, val);
1164                         break;
1165                 }
1166                 default:
1167                         do_exit++;
1168                         exit_val = 1;
1169                         break;
1170                 }
1171         }
1172
1173         if (do_exit)
1174                 exit(exit_val);
1175
1176         if (td) {
1177                 if (!ret)
1178                         ret = add_job(td, td->o.name ?: "fio", 0);
1179                 if (ret)
1180                         put_job(td);
1181         }
1182
1183         while (optind < argc) {
1184                 ini_idx++;
1185                 ini_file = realloc(ini_file, ini_idx * sizeof(char *));
1186                 ini_file[ini_idx - 1] = strdup(argv[optind]);
1187                 optind++;
1188         }
1189
1190         return ini_idx;
1191 }
1192
1193 int parse_options(int argc, char *argv[])
1194 {
1195         int job_files, i;
1196
1197         f_out = stdout;
1198         f_err = stderr;
1199
1200         fio_options_dup_and_init(l_opts);
1201
1202         if (setup_thread_area())
1203                 return 1;
1204         if (fill_def_thread())
1205                 return 1;
1206
1207         job_files = parse_cmd_line(argc, argv);
1208
1209         for (i = 0; i < job_files; i++) {
1210                 if (fill_def_thread())
1211                         return 1;
1212                 if (parse_jobs_ini(ini_file[i], i))
1213                         return 1;
1214                 free(ini_file[i]);
1215         }
1216
1217         free(ini_file);
1218         options_mem_free(&def_thread);
1219
1220         if (!thread_number) {
1221                 if (dump_cmdline)
1222                         return 0;
1223                 if (exec_profile)
1224                         return 0;
1225
1226                 log_err("No jobs defined(s)\n\n");
1227                 usage(argv[0]);
1228                 return 1;
1229         }
1230
1231         if (def_thread.o.gtod_offload) {
1232                 fio_gtod_init();
1233                 fio_gtod_offload = 1;
1234                 fio_gtod_cpu = def_thread.o.gtod_cpu;
1235         }
1236
1237         return 0;
1238 }