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 1.57";
  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 write_lat_log;
  51
  52 static int prev_group_jobs;
  53
  54 unsigned long fio_debug = 0;
  55 unsigned int fio_debug_jobno = -1;
  56 unsigned int *fio_debug_jobp = NULL;
  57
  58 static char cmd_optstr[256];
  59
  60 /*
  61  * Command line options. These will contain the above, plus a few
  62  * extra that only pertain to fio itself and not jobs.
  63  */
  64 static struct option l_opts[FIO_NR_OPTIONS] = {
  65         {
  66                 .name           = (char *) "output",
  67                 .has_arg        = required_argument,
  68                 .val            = 'o',
  69         },
  70         {
  71                 .name           = (char *) "timeout",
  72                 .has_arg        = required_argument,
  73                 .val            = 't',
  74         },
  75         {
  76                 .name           = (char *) "latency-log",
  77                 .has_arg        = required_argument,
  78                 .val            = 'l',
  79         },
  80         {
  81                 .name           = (char *) "bandwidth-log",
  82                 .has_arg        = required_argument,
  83                 .val            = 'b',
  84         },
  85         {
  86                 .name           = (char *) "minimal",
  87                 .has_arg        = optional_argument,
  88                 .val            = 'm',
  89         },
  90         {
  91                 .name           = (char *) "version",
  92                 .has_arg        = no_argument,
  93                 .val            = 'v',
  94         },
  95         {
  96                 .name           = (char *) "help",
  97                 .has_arg        = no_argument,
  98                 .val            = 'h',
  99         },
 100         {
 101                 .name           = (char *) "cmdhelp",
 102                 .has_arg        = optional_argument,
 103                 .val            = 'c',
 104         },
 105         {
 106                 .name           = (char *) "showcmd",
 107                 .has_arg        = no_argument,
 108                 .val            = 's',
 109         },
 110         {
 111                 .name           = (char *) "readonly",
 112                 .has_arg        = no_argument,
 113                 .val            = 'r',
 114         },
 115         {
 116                 .name           = (char *) "eta",
 117                 .has_arg        = required_argument,
 118                 .val            = 'e',
 119         },
 120         {
 121                 .name           = (char *) "debug",
 122                 .has_arg        = required_argument,
 123                 .val            = 'd',
 124         },
 125         {
 126                 .name           = (char *) "section",
 127                 .has_arg        = required_argument,
 128                 .val            = 'x',
 129         },
 130         {
 131                 .name           = (char *) "alloc-size",
 132                 .has_arg        = required_argument,
 133                 .val            = 'a',
 134         },
 135         {
 136                 .name           = (char *) "profile",
 137                 .has_arg        = required_argument,
 138                 .val            = 'p',
 139         },
 140         {
 141                 .name           = (char *) "warnings-fatal",
 142                 .has_arg        = no_argument,
 143                 .val            = 'w',
 144         },
 145         {
 146                 .name           = (char *) "max-jobs",
 147                 .has_arg        = required_argument,
 148                 .val            = 'j',
 149         },
 150         {
 151                 .name           = NULL,
 152         },
 153 };
 154
 155 FILE *get_f_out()
 156 {
 157         return f_out;
 158 }
 159
 160 FILE *get_f_err()
 161 {
 162         return f_err;
 163 }
 164
 165 /*
 166  * Return a free job structure.
 167  */
 168 static struct thread_data *get_new_job(int global, struct thread_data *parent)
 169 {
 170         struct thread_data *td;
 171
 172         if (global)
 173                 return &def_thread;
 174         if (thread_number >= max_jobs) {
 175                 log_err("error: maximum number of jobs (%d) reached.\n",
 176                                 max_jobs);
 177                 return NULL;
 178         }
 179
 180         td = &threads[thread_number++];
 181         *td = *parent;
 182
 183         td->o.uid = td->o.gid = -1U;
 184
 185         dup_files(td, parent);
 186         options_mem_dupe(td);
 187
 188         profile_add_hooks(td);
 189
 190         td->thread_number = thread_number;
 191         return td;
 192 }
 193
 194 static void put_job(struct thread_data *td)
 195 {
 196         if (td == &def_thread)
 197                 return;
 198
 199         profile_td_exit(td);
 200
 201         if (td->error)
 202                 log_info("fio: %s\n", td->verror);
 203
 204         memset(&threads[td->thread_number - 1], 0, sizeof(*td));
 205         thread_number--;
 206 }
 207
 208 static int __setup_rate(struct thread_data *td, enum fio_ddir ddir)
 209 {
 210         unsigned int bs = td->o.min_bs[ddir];
 211         unsigned long long bytes_per_sec;
 212
 213         assert(ddir_rw(ddir));
 214
 215         if (td->o.rate[ddir])
 216                 bytes_per_sec = td->o.rate[ddir];
 217         else
 218                 bytes_per_sec = td->o.rate_iops[ddir] * bs;
 219
 220         if (!bytes_per_sec) {
 221                 log_err("rate lower than supported\n");
 222                 return -1;
 223         }
 224
 225         td->rate_nsec_cycle[ddir] = 1000000000ULL / bytes_per_sec;
 226         td->rate_pending_usleep[ddir] = 0;
 227         return 0;
 228 }
 229
 230 static int setup_rate(struct thread_data *td)
 231 {
 232         int ret = 0;
 233
 234         if (td->o.rate[DDIR_READ] || td->o.rate_iops[DDIR_READ])
 235                 ret = __setup_rate(td, DDIR_READ);
 236         if (td->o.rate[DDIR_WRITE] || td->o.rate_iops[DDIR_WRITE])
 237                 ret |= __setup_rate(td, DDIR_WRITE);
 238
 239         return ret;
 240 }
 241
 242 static int fixed_block_size(struct thread_options *o)
 243 {
 244         return o->min_bs[DDIR_READ] == o->max_bs[DDIR_READ] &&
 245                 o->min_bs[DDIR_WRITE] == o->max_bs[DDIR_WRITE] &&
 246                 o->min_bs[DDIR_READ] == o->min_bs[DDIR_WRITE];
 247 }
 248
 249 /*
 250  * Lazy way of fixing up options that depend on each other. We could also
 251  * define option callback handlers, but this is easier.
 252  */
 253 static int fixup_options(struct thread_data *td)
 254 {
 255         struct thread_options *o = &td->o;
 256         int ret = 0;
 257
 258 #ifndef FIO_HAVE_PSHARED_MUTEX
 259         if (!o->use_thread) {
 260                 log_info("fio: this platform does not support process shared"
 261                          " mutexes, forcing use of threads. Use the 'thread'"
 262                          " option to get rid of this warning.\n");
 263                 o->use_thread = 1;
 264                 ret = warnings_fatal;
 265         }
 266 #endif
 267
 268         if (o->write_iolog_file && o->read_iolog_file) {
 269                 log_err("fio: read iolog overrides write_iolog\n");
 270                 free(o->write_iolog_file);
 271                 o->write_iolog_file = NULL;
 272                 ret = warnings_fatal;
 273         }
 274
 275         /*
 276          * only really works for sequential io for now, and with 1 file
 277          */
 278         if (o->zone_size && td_random(td) && o->open_files == 1)
 279                 o->zone_size = 0;
 280
 281         /*
 282          * Reads can do overwrites, we always need to pre-create the file
 283          */
 284         if (td_read(td) || td_rw(td))
 285                 o->overwrite = 1;
 286
 287         if (!o->min_bs[DDIR_READ])
 288                 o->min_bs[DDIR_READ] = o->bs[DDIR_READ];
 289         if (!o->max_bs[DDIR_READ])
 290                 o->max_bs[DDIR_READ] = o->bs[DDIR_READ];
 291         if (!o->min_bs[DDIR_WRITE])
 292                 o->min_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 293         if (!o->max_bs[DDIR_WRITE])
 294                 o->max_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 295
 296         o->rw_min_bs = min(o->min_bs[DDIR_READ], o->min_bs[DDIR_WRITE]);
 297
 298         /*
 299          * For random IO, allow blockalign offset other than min_bs.
 300          */
 301         if (!o->ba[DDIR_READ] || !td_random(td))
 302                 o->ba[DDIR_READ] = o->min_bs[DDIR_READ];
 303         if (!o->ba[DDIR_WRITE] || !td_random(td))
 304                 o->ba[DDIR_WRITE] = o->min_bs[DDIR_WRITE];
 305
 306         if ((o->ba[DDIR_READ] != o->min_bs[DDIR_READ] ||
 307             o->ba[DDIR_WRITE] != o->min_bs[DDIR_WRITE]) &&
 308             !o->norandommap) {
 309                 log_err("fio: Any use of blockalign= turns off randommap\n");
 310                 o->norandommap = 1;
 311                 ret = warnings_fatal;
 312         }
 313
 314         if (!o->file_size_high)
 315                 o->file_size_high = o->file_size_low;
 316
 317         if (o->norandommap && o->verify != VERIFY_NONE
 318             && !fixed_block_size(o))  {
 319                 log_err("fio: norandommap given for variable block sizes, "
 320                         "verify disabled\n");
 321                 o->verify = VERIFY_NONE;
 322                 ret = warnings_fatal;
 323         }
 324         if (o->bs_unaligned && (o->odirect || td->io_ops->flags & FIO_RAWIO))
 325                 log_err("fio: bs_unaligned may not work with raw io\n");
 326
 327         /*
 328          * thinktime_spin must be less than thinktime
 329          */
 330         if (o->thinktime_spin > o->thinktime)
 331                 o->thinktime_spin = o->thinktime;
 332
 333         /*
 334          * The low water mark cannot be bigger than the iodepth
 335          */
 336         if (o->iodepth_low > o->iodepth || !o->iodepth_low) {
 337                 /*
 338                  * syslet work around - if the workload is sequential,
 339                  * we want to let the queue drain all the way down to
 340                  * avoid seeking between async threads
 341                  */
 342                 if (!strcmp(td->io_ops->name, "syslet-rw") && !td_random(td))
 343                         o->iodepth_low = 1;
 344                 else
 345                         o->iodepth_low = o->iodepth;
 346         }
 347
 348         /*
 349          * If batch number isn't set, default to the same as iodepth
 350          */
 351         if (o->iodepth_batch > o->iodepth || !o->iodepth_batch)
 352                 o->iodepth_batch = o->iodepth;
 353
 354         if (o->nr_files > td->files_index)
 355                 o->nr_files = td->files_index;
 356
 357         if (o->open_files > o->nr_files || !o->open_files)
 358                 o->open_files = o->nr_files;
 359
 360         if (((o->rate[0] + o->rate[1]) && (o->rate_iops[0] + o->rate_iops[1]))||
 361             ((o->ratemin[0] + o->ratemin[1]) && (o->rate_iops_min[0] +
 362                 o->rate_iops_min[1]))) {
 363                 log_err("fio: rate and rate_iops are mutually exclusive\n");
 364                 ret = 1;
 365         }
 366         if ((o->rate[0] < o->ratemin[0]) || (o->rate[1] < o->ratemin[1]) ||
 367             (o->rate_iops[0] < o->rate_iops_min[0]) ||
 368             (o->rate_iops[1] < o->rate_iops_min[1])) {
 369                 log_err("fio: minimum rate exceeds rate\n");
 370                 ret = 1;
 371         }
 372
 373         if (!o->timeout && o->time_based) {
 374                 log_err("fio: time_based requires a runtime/timeout setting\n");
 375                 o->time_based = 0;
 376                 ret = warnings_fatal;
 377         }
 378
 379         if (o->fill_device && !o->size)
 380                 o->size = -1ULL;
 381
 382         if (o->verify != VERIFY_NONE) {
 383                 if (td_write(td) && o->do_verify && o->numjobs > 1) {
 384                         log_info("Multiple writers may overwrite blocks that "
 385                                 "belong to other jobs. This can cause "
 386                                 "verification failures.\n");
 387                         ret = warnings_fatal;
 388                 }
 389
 390                 o->refill_buffers = 1;
 391                 if (o->max_bs[DDIR_WRITE] != o->min_bs[DDIR_WRITE] &&
 392                     !o->verify_interval)
 393                         o->verify_interval = o->min_bs[DDIR_WRITE];
 394         }
 395
 396         if (o->pre_read) {
 397                 o->invalidate_cache = 0;
 398                 if (td->io_ops->flags & FIO_PIPEIO) {
 399                         log_info("fio: cannot pre-read files with an IO engine"
 400                                  " that isn't seekable. Pre-read disabled.\n");
 401                         ret = warnings_fatal;
 402                 }
 403         }
 404
 405 #ifndef FIO_HAVE_FDATASYNC
 406         if (o->fdatasync_blocks) {
 407                 log_info("fio: this platform does not support fdatasync()"
 408                          " falling back to using fsync().  Use the 'fsync'"
 409                          " option instead of 'fdatasync' to get rid of"
 410                          " this warning\n");
 411                 o->fsync_blocks = o->fdatasync_blocks;
 412                 o->fdatasync_blocks = 0;
 413                 ret = warnings_fatal;
 414         }
 415 #endif
 416
 417         return ret;
 418 }
 419
 420 /*
 421  * This function leaks the buffer
 422  */
 423 static char *to_kmg(unsigned int val)
 424 {
 425         char *buf = malloc(32);
 426         char post[] = { 0, 'K', 'M', 'G', 'P', 'E', 0 };
 427         char *p = post;
 428
 429         do {
 430                 if (val & 1023)
 431                         break;
 432
 433                 val >>= 10;
 434                 p++;
 435         } while (*p);
 436
 437         snprintf(buf, 31, "%u%c", val, *p);
 438         return buf;
 439 }
 440
 441 /* External engines are specified by "external:name.o") */
 442 static const char *get_engine_name(const char *str)
 443 {
 444         char *p = strstr(str, ":");
 445
 446         if (!p)
 447                 return str;
 448
 449         p++;
 450         strip_blank_front(&p);
 451         strip_blank_end(p);
 452         return p;
 453 }
 454
 455 static int exists_and_not_file(const char *filename)
 456 {
 457         struct stat sb;
 458
 459         if (lstat(filename, &sb) == -1)
 460                 return 0;
 461
 462         /* \\.\ is the device namespace in Windows, where every file
 463          * is a device node */
 464         if (S_ISREG(sb.st_mode) && strncmp(filename, "\\\\.\\", 4) != 0)
 465                 return 0;
 466
 467         return 1;
 468 }
 469
 470 static void td_fill_rand_seeds_os(struct thread_data *td)
 471 {
 472         os_random_seed(td->rand_seeds[0], &td->bsrange_state);
 473         os_random_seed(td->rand_seeds[1], &td->verify_state);
 474         os_random_seed(td->rand_seeds[2], &td->rwmix_state);
 475
 476         if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
 477                 os_random_seed(td->rand_seeds[3], &td->next_file_state);
 478
 479         os_random_seed(td->rand_seeds[5], &td->file_size_state);
 480         os_random_seed(td->rand_seeds[6], &td->trim_state);
 481
 482         if (!td_random(td))
 483                 return;
 484
 485         if (td->o.rand_repeatable)
 486                 td->rand_seeds[4] = FIO_RANDSEED * td->thread_number;
 487
 488         os_random_seed(td->rand_seeds[4], &td->random_state);
 489 }
 490
 491 static void td_fill_rand_seeds_internal(struct thread_data *td)
 492 {
 493         init_rand_seed(&td->__bsrange_state, td->rand_seeds[0]);
 494         init_rand_seed(&td->__verify_state, td->rand_seeds[1]);
 495         init_rand_seed(&td->__rwmix_state, td->rand_seeds[2]);
 496
 497         if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
 498                 init_rand_seed(&td->__next_file_state, td->rand_seeds[3]);
 499
 500         init_rand_seed(&td->__file_size_state, td->rand_seeds[5]);
 501         init_rand_seed(&td->__trim_state, td->rand_seeds[6]);
 502
 503         if (!td_random(td))
 504                 return;
 505
 506         if (td->o.rand_repeatable)
 507                 td->rand_seeds[4] = FIO_RANDSEED * td->thread_number;
 508
 509         init_rand_seed(&td->__random_state, td->rand_seeds[4]);
 510 }
 511
 512 void td_fill_rand_seeds(struct thread_data *td)
 513 {
 514         if (td->o.use_os_rand)
 515                 td_fill_rand_seeds_os(td);
 516         else
 517                 td_fill_rand_seeds_internal(td);
 518 }
 519
 520 /*
 521  * Initialize the various random states we need (random io, block size ranges,
 522  * read/write mix, etc).
 523  */
 524 static int init_random_state(struct thread_data *td)
 525 {
 526         int fd;
 527
 528         fd = open("/dev/urandom", O_RDONLY);
 529         if (fd == -1) {
 530                 td_verror(td, errno, "open");
 531                 return 1;
 532         }
 533
 534         if (read(fd, td->rand_seeds, sizeof(td->rand_seeds)) <
 535             (int) sizeof(td->rand_seeds)) {
 536                 td_verror(td, EIO, "read");
 537                 close(fd);
 538                 return 1;
 539         }
 540
 541         close(fd);
 542         td_fill_rand_seeds(td);
 543         return 0;
 544 }
 545
 546 /*
 547  * Adds a job to the list of things todo. Sanitizes the various options
 548  * to make sure we don't have conflicts, and initializes various
 549  * members of td.
 550  */
 551 static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
 552 {
 553         const char *ddir_str[] = { NULL, "read", "write", "rw", NULL,
 554                                    "randread", "randwrite", "randrw" };
 555         unsigned int i;
 556         const char *engine;
 557         char fname[PATH_MAX];
 558         int numjobs, file_alloced;
 559
 560         /*
 561          * the def_thread is just for options, it's not a real job
 562          */
 563         if (td == &def_thread)
 564                 return 0;
 565
 566         /*
 567          * if we are just dumping the output command line, don't add the job
 568          */
 569         if (dump_cmdline) {
 570                 put_job(td);
 571                 return 0;
 572         }
 573
 574         if (profile_td_init(td))
 575                 goto err;
 576
 577         engine = get_engine_name(td->o.ioengine);
 578         td->io_ops = load_ioengine(td, engine);
 579         if (!td->io_ops) {
 580                 log_err("fio: failed to load engine %s\n", engine);
 581                 goto err;
 582         }
 583
 584         if (td->o.use_thread)
 585                 nr_thread++;
 586         else
 587                 nr_process++;
 588
 589         if (td->o.odirect)
 590                 td->io_ops->flags |= FIO_RAWIO;
 591
 592         file_alloced = 0;
 593         if (!td->o.filename && !td->files_index && !td->o.read_iolog_file) {
 594                 file_alloced = 1;
 595
 596                 if (td->o.nr_files == 1 && exists_and_not_file(jobname))
 597                         add_file(td, jobname);
 598                 else {
 599                         for (i = 0; i < td->o.nr_files; i++) {
 600                                 sprintf(fname, "%s.%d.%d", jobname,
 601                                                         td->thread_number, i);
 602                                 add_file(td, fname);
 603                         }
 604                 }
 605         }
 606
 607         if (fixup_options(td))
 608                 goto err;
 609
 610         if (td->io_ops->flags & FIO_DISKLESSIO) {
 611                 struct fio_file *f;
 612
 613                 for_each_file(td, f, i)
 614                         f->real_file_size = -1ULL;
 615         }
 616
 617         td->mutex = fio_mutex_init(0);
 618
 619         td->ts.clat_stat[0].min_val = td->ts.clat_stat[1].min_val = ULONG_MAX;
 620         td->ts.slat_stat[0].min_val = td->ts.slat_stat[1].min_val = ULONG_MAX;
 621         td->ts.lat_stat[0].min_val = td->ts.lat_stat[1].min_val = ULONG_MAX;
 622         td->ts.bw_stat[0].min_val = td->ts.bw_stat[1].min_val = ULONG_MAX;
 623         td->ddir_seq_nr = td->o.ddir_seq_nr;
 624
 625         if ((td->o.stonewall || td->o.new_group) && prev_group_jobs) {
 626                 prev_group_jobs = 0;
 627                 groupid++;
 628         }
 629
 630         td->groupid = groupid;
 631         prev_group_jobs++;
 632
 633         if (init_random_state(td))
 634                 goto err;
 635
 636         if (setup_rate(td))
 637                 goto err;
 638
 639         if (td->o.write_lat_log) {
 640                 setup_log(&td->ts.lat_log);
 641                 setup_log(&td->ts.slat_log);
 642                 setup_log(&td->ts.clat_log);
 643         }
 644         if (td->o.write_bw_log)
 645                 setup_log(&td->ts.bw_log);
 646
 647         if (!td->o.name)
 648                 td->o.name = strdup(jobname);
 649
 650         if (!terse_output) {
 651                 if (!job_add_num) {
 652                         if (!strcmp(td->io_ops->name, "cpuio")) {
 653                                 log_info("%s: ioengine=cpu, cpuload=%u,"
 654                                          " cpucycle=%u\n", td->o.name,
 655                                                         td->o.cpuload,
 656                                                         td->o.cpucycle);
 657                         } else {
 658                                 char *c1, *c2, *c3, *c4;
 659
 660                                 c1 = to_kmg(td->o.min_bs[DDIR_READ]);
 661                                 c2 = to_kmg(td->o.max_bs[DDIR_READ]);
 662                                 c3 = to_kmg(td->o.min_bs[DDIR_WRITE]);
 663                                 c4 = to_kmg(td->o.max_bs[DDIR_WRITE]);
 664
 665                                 log_info("%s: (g=%d): rw=%s, bs=%s-%s/%s-%s,"
 666                                          " ioengine=%s, iodepth=%u\n",
 667                                                 td->o.name, td->groupid,
 668                                                 ddir_str[td->o.td_ddir],
 669                                                 c1, c2, c3, c4,
 670                                                 td->io_ops->name,
 671                                                 td->o.iodepth);
 672
 673                                 free(c1);
 674                                 free(c2);
 675                                 free(c3);
 676                                 free(c4);
 677                         }
 678                 } else if (job_add_num == 1)
 679                         log_info("...\n");
 680         }
 681
 682         /*
 683          * recurse add identical jobs, clear numjobs and stonewall options
 684          * as they don't apply to sub-jobs
 685          */
 686         numjobs = td->o.numjobs;
 687         while (--numjobs) {
 688                 struct thread_data *td_new = get_new_job(0, td);
 689
 690                 if (!td_new)
 691                         goto err;
 692
 693                 td_new->o.numjobs = 1;
 694                 td_new->o.stonewall = 0;
 695                 td_new->o.new_group = 0;
 696
 697                 if (file_alloced) {
 698                         td_new->o.filename = NULL;
 699                         td_new->files_index = 0;
 700                         td_new->files_size = 0;
 701                         td_new->files = NULL;
 702                 }
 703
 704                 job_add_num = numjobs - 1;
 705
 706                 if (add_job(td_new, jobname, job_add_num))
 707                         goto err;
 708         }
 709
 710         return 0;
 711 err:
 712         put_job(td);
 713         return -1;
 714 }
 715
 716 /*
 717  * Parse as if 'o' was a command line
 718  */
 719 void add_job_opts(const char **o)
 720 {
 721         struct thread_data *td, *td_parent;
 722         int i, in_global = 1;
 723         char jobname[32];
 724
 725         i = 0;
 726         td_parent = td = NULL;
 727         while (o[i]) {
 728                 if (!strncmp(o[i], "name", 4)) {
 729                         in_global = 0;
 730                         if (td)
 731                                 add_job(td, jobname, 0);
 732                         td = NULL;
 733                         sprintf(jobname, "%s", o[i] + 5);
 734                 }
 735                 if (in_global && !td_parent)
 736                         td_parent = get_new_job(1, &def_thread);
 737                 else if (!in_global && !td) {
 738                         if (!td_parent)
 739                                 td_parent = &def_thread;
 740                         td = get_new_job(0, td_parent);
 741                 }
 742                 if (in_global)
 743                         fio_options_parse(td_parent, (char **) &o[i], 1);
 744                 else
 745                         fio_options_parse(td, (char **) &o[i], 1);
 746                 i++;
 747         }
 748
 749         if (td)
 750                 add_job(td, jobname, 0);
 751 }
 752
 753 static int skip_this_section(const char *name)
 754 {
 755         int i;
 756
 757         if (!nr_job_sections)
 758                 return 0;
 759         if (!strncmp(name, "global", 6))
 760                 return 0;
 761
 762         for (i = 0; i < nr_job_sections; i++)
 763                 if (!strcmp(job_sections[i], name))
 764                         return 0;
 765
 766         return 1;
 767 }
 768
 769 static int is_empty_or_comment(char *line)
 770 {
 771         unsigned int i;
 772
 773         for (i = 0; i < strlen(line); i++) {
 774                 if (line[i] == ';')
 775                         return 1;
 776                 if (line[i] == '#')
 777                         return 1;
 778                 if (!isspace((int) line[i]) && !iscntrl((int) line[i]))
 779                         return 0;
 780         }
 781
 782         return 1;
 783 }
 784
 785 /*
 786  * This is our [ini] type file parser.
 787  */
 788 static int parse_jobs_ini(char *file, int stonewall_flag)
 789 {
 790         unsigned int global;
 791         struct thread_data *td;
 792         char *string, *name;
 793         FILE *f;
 794         char *p;
 795         int ret = 0, stonewall;
 796         int first_sect = 1;
 797         int skip_fgets = 0;
 798         int inside_skip = 0;
 799         char **opts;
 800         int i, alloc_opts, num_opts;
 801
 802         if (!strcmp(file, "-"))
 803                 f = stdin;
 804         else
 805                 f = fopen(file, "r");
 806
 807         if (!f) {
 808                 perror("fopen job file");
 809                 return 1;
 810         }
 811
 812         string = malloc(4096);
 813
 814         /*
 815          * it's really 256 + small bit, 280 should suffice
 816          */
 817         name = malloc(280);
 818         memset(name, 0, 280);
 819
 820         alloc_opts = 8;
 821         opts = malloc(sizeof(char *) * alloc_opts);
 822         num_opts = 0;
 823
 824         stonewall = stonewall_flag;
 825         do {
 826                 /*
 827                  * if skip_fgets is set, we already have loaded a line we
 828                  * haven't handled.
 829                  */
 830                 if (!skip_fgets) {
 831                         p = fgets(string, 4095, f);
 832                         if (!p)
 833                                 break;
 834                 }
 835
 836                 skip_fgets = 0;
 837                 strip_blank_front(&p);
 838                 strip_blank_end(p);
 839
 840                 if (is_empty_or_comment(p))
 841                         continue;
 842                 if (sscanf(p, "[%255[^\n]]", name) != 1) {
 843                         if (inside_skip)
 844                                 continue;
 845                         log_err("fio: option <%s> outside of [] job section\n",
 846                                                                         p);
 847                         break;
 848                 }
 849
 850                 name[strlen(name) - 1] = '\0';
 851
 852                 if (skip_this_section(name)) {
 853                         inside_skip = 1;
 854                         continue;
 855                 } else
 856                         inside_skip = 0;
 857
 858                 global = !strncmp(name, "global", 6);
 859
 860                 if (dump_cmdline) {
 861                         if (first_sect)
 862                                 log_info("fio ");
 863                         if (!global)
 864                                 log_info("--name=%s ", name);
 865                         first_sect = 0;
 866                 }
 867
 868                 td = get_new_job(global, &def_thread);
 869                 if (!td) {
 870                         ret = 1;
 871                         break;
 872                 }
 873
 874                 /*
 875                  * Seperate multiple job files by a stonewall
 876                  */
 877                 if (!global && stonewall) {
 878                         td->o.stonewall = stonewall;
 879                         stonewall = 0;
 880                 }
 881
 882                 num_opts = 0;
 883                 memset(opts, 0, alloc_opts * sizeof(char *));
 884
 885                 while ((p = fgets(string, 4096, f)) != NULL) {
 886                         if (is_empty_or_comment(p))
 887                                 continue;
 888
 889                         strip_blank_front(&p);
 890
 891                         /*
 892                          * new section, break out and make sure we don't
 893                          * fgets() a new line at the top.
 894                          */
 895                         if (p[0] == '[') {
 896                                 skip_fgets = 1;
 897                                 break;
 898                         }
 899
 900                         strip_blank_end(p);
 901
 902                         if (num_opts == alloc_opts) {
 903                                 alloc_opts <<= 1;
 904                                 opts = realloc(opts,
 905                                                 alloc_opts * sizeof(char *));
 906                         }
 907
 908                         opts[num_opts] = strdup(p);
 909                         num_opts++;
 910                 }
 911
 912                 ret = fio_options_parse(td, opts, num_opts);
 913                 if (!ret) {
 914                         if (dump_cmdline)
 915                                 for (i = 0; i < num_opts; i++)
 916                                         log_info("--%s ", opts[i]);
 917
 918                         ret = add_job(td, name, 0);
 919                 } else {
 920                         log_err("fio: job %s dropped\n", name);
 921                         put_job(td);
 922                 }
 923
 924                 for (i = 0; i < num_opts; i++)
 925                         free(opts[i]);
 926                 num_opts = 0;
 927         } while (!ret);
 928
 929         if (dump_cmdline)
 930                 log_info("\n");
 931
 932         for (i = 0; i < num_opts; i++)
 933                 free(opts[i]);
 934
 935         free(string);
 936         free(name);
 937         free(opts);
 938         if (f != stdin)
 939                 fclose(f);
 940         return ret;
 941 }
 942
 943 static int fill_def_thread(void)
 944 {
 945         memset(&def_thread, 0, sizeof(def_thread));
 946
 947         fio_getaffinity(getpid(), &def_thread.o.cpumask);
 948
 949         /*
 950          * fill default options
 951          */
 952         fio_fill_default_options(&def_thread);
 953         return 0;
 954 }
 955
 956 static void free_shm(void)
 957 {
 958         struct shmid_ds sbuf;
 959
 960         if (threads) {
 961                 void *tp = threads;
 962
 963                 threads = NULL;
 964                 file_hash_exit();
 965                 fio_debug_jobp = NULL;
 966                 shmdt(tp);
 967                 shmctl(shm_id, IPC_RMID, &sbuf);
 968         }
 969
 970         scleanup();
 971 }
 972
 973 /*
 974  * The thread area is shared between the main process and the job
 975  * threads/processes. So setup a shared memory segment that will hold
 976  * all the job info. We use the end of the region for keeping track of
 977  * open files across jobs, for file sharing.
 978  */
 979 static int setup_thread_area(void)
 980 {
 981         void *hash;
 982
 983         /*
 984          * 1024 is too much on some machines, scale max_jobs if
 985          * we get a failure that looks like too large a shm segment
 986          */
 987         do {
 988                 size_t size = max_jobs * sizeof(struct thread_data);
 989
 990                 size += file_hash_size;
 991                 size += sizeof(unsigned int);
 992
 993                 shm_id = shmget(0, size, IPC_CREAT | 0600);
 994                 if (shm_id != -1)
 995                         break;
 996                 if (errno != EINVAL) {
 997                         perror("shmget");
 998                         break;
 999                 }
1000
1001                 max_jobs >>= 1;
1002         } while (max_jobs);
1003
1004         if (shm_id == -1)
1005                 return 1;
1006
1007         threads = shmat(shm_id, NULL, 0);
1008         if (threads == (void *) -1) {
1009                 perror("shmat");
1010                 return 1;
1011         }
1012
1013         memset(threads, 0, max_jobs * sizeof(struct thread_data));
1014         hash = (void *) threads + max_jobs * sizeof(struct thread_data);
1015         fio_debug_jobp = (void *) hash + file_hash_size;
1016         *fio_debug_jobp = -1;
1017         file_hash_init(hash);
1018         atexit(free_shm);
1019         return 0;
1020 }
1021
1022 static void usage(const char *name)
1023 {
1024         printf("%s\n", fio_version_string);
1025         printf("%s [options] [job options] <job file(s)>\n", name);
1026         printf("\t--debug=options\tEnable debug logging\n");
1027         printf("\t--output\tWrite output to file\n");
1028         printf("\t--timeout\tRuntime in seconds\n");
1029         printf("\t--latency-log\tGenerate per-job latency logs\n");
1030         printf("\t--bandwidth-log\tGenerate per-job bandwidth logs\n");
1031         printf("\t--minimal\tMinimal (terse) output\n");
1032         printf("\t--version\tPrint version info and exit\n");
1033         printf("\t--help\t\tPrint this page\n");
1034         printf("\t--cmdhelp=cmd\tPrint command help, \"all\" for all of"
1035                 " them\n");
1036         printf("\t--showcmd\tTurn a job file into command line options\n");
1037         printf("\t--eta=when\tWhen ETA estimate should be printed\n");
1038         printf("\t          \tMay be \"always\", \"never\" or \"auto\"\n");
1039         printf("\t--readonly\tTurn on safety read-only checks, preventing"
1040                 " writes\n");
1041         printf("\t--section=name\tOnly run specified section in job file\n");
1042         printf("\t--alloc-size=kb\tSet smalloc pool to this size in kb"
1043                 " (def 1024)\n");
1044         printf("\t--warnings-fatal Fio parser warnings are fatal\n");
1045         printf("\t--max-jobs\tMaximum number of threads/processes to support\n");
1046         printf("\nFio was written by Jens Axboe <jens.axboe@oracle.com>");
1047         printf("\n                   Jens Axboe <jaxboe@fusionio.com>\n");
1048 }
1049
1050 #ifdef FIO_INC_DEBUG
1051 struct debug_level debug_levels[] = {
1052         { .name = "process",    .shift = FD_PROCESS, },
1053         { .name = "file",       .shift = FD_FILE, },
1054         { .name = "io",         .shift = FD_IO, },
1055         { .name = "mem",        .shift = FD_MEM, },
1056         { .name = "blktrace",   .shift = FD_BLKTRACE },
1057         { .name = "verify",     .shift = FD_VERIFY },
1058         { .name = "random",     .shift = FD_RANDOM },
1059         { .name = "parse",      .shift = FD_PARSE },
1060         { .name = "diskutil",   .shift = FD_DISKUTIL },
1061         { .name = "job",        .shift = FD_JOB },
1062         { .name = "mutex",      .shift = FD_MUTEX },
1063         { .name = "profile",    .shift = FD_PROFILE },
1064         { .name = "time",       .shift = FD_TIME },
1065         { .name = NULL, },
1066 };
1067
1068 static int set_debug(const char *string)
1069 {
1070         struct debug_level *dl;
1071         char *p = (char *) string;
1072         char *opt;
1073         int i;
1074
1075         if (!strcmp(string, "?") || !strcmp(string, "help")) {
1076                 log_info("fio: dumping debug options:");
1077                 for (i = 0; debug_levels[i].name; i++) {
1078                         dl = &debug_levels[i];
1079                         log_info("%s,", dl->name);
1080                 }
1081                 log_info("all\n");
1082                 return 1;
1083         }
1084
1085         while ((opt = strsep(&p, ",")) != NULL) {
1086                 int found = 0;
1087
1088                 if (!strncmp(opt, "all", 3)) {
1089                         log_info("fio: set all debug options\n");
1090                         fio_debug = ~0UL;
1091                         continue;
1092                 }
1093
1094                 for (i = 0; debug_levels[i].name; i++) {
1095                         dl = &debug_levels[i];
1096                         found = !strncmp(opt, dl->name, strlen(dl->name));
1097                         if (!found)
1098                                 continue;
1099
1100                         if (dl->shift == FD_JOB) {
1101                                 opt = strchr(opt, ':');
1102                                 if (!opt) {
1103                                         log_err("fio: missing job number\n");
1104                                         break;
1105                                 }
1106                                 opt++;
1107                                 fio_debug_jobno = atoi(opt);
1108                                 log_info("fio: set debug jobno %d\n",
1109                                                         fio_debug_jobno);
1110                         } else {
1111                                 log_info("fio: set debug option %s\n", opt);
1112                                 fio_debug |= (1UL << dl->shift);
1113                         }
1114                         break;
1115                 }
1116
1117                 if (!found)
1118                         log_err("fio: debug mask %s not found\n", opt);
1119         }
1120         return 0;
1121 }
1122 #else
1123 static int set_debug(const char *string)
1124 {
1125         log_err("fio: debug tracing not included in build\n");
1126         return 1;
1127 }
1128 #endif
1129
1130 static void fio_options_fill_optstring(void)
1131 {
1132         char *ostr = cmd_optstr;
1133         int i, c;
1134
1135         c = i = 0;
1136         while (l_opts[i].name) {
1137                 ostr[c++] = l_opts[i].val;
1138                 if (l_opts[i].has_arg == required_argument)
1139                         ostr[c++] = ':';
1140                 else if (l_opts[i].has_arg == optional_argument) {
1141                         ostr[c++] = ':';
1142                         ostr[c++] = ':';
1143                 }
1144                 i++;
1145         }
1146         ostr[c] = '\0';
1147 }
1148
1149 static int parse_cmd_line(int argc, char *argv[])
1150 {
1151         struct thread_data *td = NULL;
1152         int c, ini_idx = 0, lidx, ret = 0, do_exit = 0, exit_val = 0;
1153         char *ostr = cmd_optstr;
1154
1155         while ((c = getopt_long_only(argc, argv, ostr, l_opts, &lidx)) != -1) {
1156                 switch (c) {
1157                 case 'a':
1158                         smalloc_pool_size = atoi(optarg);
1159                         break;
1160                 case 't':
1161                         def_thread.o.timeout = atoi(optarg);
1162                         break;
1163                 case 'l':
1164                         write_lat_log = 1;
1165                         break;
1166                 case 'b':
1167                         write_bw_log = 1;
1168                         break;
1169                 case 'o':
1170                         f_out = fopen(optarg, "w+");
1171                         if (!f_out) {
1172                                 perror("fopen output");
1173                                 exit(1);
1174                         }
1175                         f_err = f_out;
1176                         break;
1177                 case 'm':
1178                         terse_output = 1;
1179                         break;
1180                 case 'h':
1181                         usage(argv[0]);
1182                         exit(0);
1183                 case 'c':
1184                         exit(fio_show_option_help(optarg));
1185                 case 's':
1186                         dump_cmdline = 1;
1187                         break;
1188                 case 'r':
1189                         read_only = 1;
1190                         break;
1191                 case 'v':
1192                         log_info("%s\n", fio_version_string);
1193                         exit(0);
1194                 case 'e':
1195                         if (!strcmp("always", optarg))
1196                                 eta_print = FIO_ETA_ALWAYS;
1197                         else if (!strcmp("never", optarg))
1198                                 eta_print = FIO_ETA_NEVER;
1199                         break;
1200                 case 'd':
1201                         if (set_debug(optarg))
1202                                 do_exit++;
1203                         break;
1204                 case 'x': {
1205                         size_t new_size;
1206
1207                         if (!strcmp(optarg, "global")) {
1208                                 log_err("fio: can't use global as only "
1209                                         "section\n");
1210                                 do_exit++;
1211                                 exit_val = 1;
1212                                 break;
1213                         }
1214                         new_size = (nr_job_sections + 1) * sizeof(char *);
1215                         job_sections = realloc(job_sections, new_size);
1216                         job_sections[nr_job_sections] = strdup(optarg);
1217                         nr_job_sections++;
1218                         break;
1219                         }
1220                 case 'p':
1221                         exec_profile = strdup(optarg);
1222                         break;
1223                 case FIO_GETOPT_JOB: {
1224                         const char *opt = l_opts[lidx].name;
1225                         char *val = optarg;
1226
1227                         if (!strncmp(opt, "name", 4) && td) {
1228                                 ret = add_job(td, td->o.name ?: "fio", 0);
1229                                 if (ret)
1230                                         return 0;
1231                                 td = NULL;
1232                         }
1233                         if (!td) {
1234                                 int is_section = !strncmp(opt, "name", 4);
1235                                 int global = 0;
1236
1237                                 if (!is_section || !strncmp(val, "global", 6))
1238                                         global = 1;
1239
1240                                 if (is_section && skip_this_section(val))
1241                                         continue;
1242
1243                                 td = get_new_job(global, &def_thread);
1244                                 if (!td)
1245                                         return 0;
1246                         }
1247
1248                         ret = fio_cmd_option_parse(td, opt, val);
1249                         break;
1250                 }
1251                 case 'w':
1252                         warnings_fatal = 1;
1253                         break;
1254                 case 'j':
1255                         max_jobs = atoi(optarg);
1256                         if (!max_jobs || max_jobs > REAL_MAX_JOBS) {
1257                                 log_err("fio: invalid max jobs: %d\n", max_jobs);
1258                                 do_exit++;
1259                                 exit_val = 1;
1260                         }
1261                         break;
1262                 default:
1263                         do_exit++;
1264                         exit_val = 1;
1265                         break;
1266                 }
1267         }
1268
1269         if (do_exit)
1270                 exit(exit_val);
1271
1272         if (td) {
1273                 if (!ret)
1274                         ret = add_job(td, td->o.name ?: "fio", 0);
1275         }
1276
1277         while (optind < argc) {
1278                 ini_idx++;
1279                 ini_file = realloc(ini_file, ini_idx * sizeof(char *));
1280                 ini_file[ini_idx - 1] = strdup(argv[optind]);
1281                 optind++;
1282         }
1283
1284         return ini_idx;
1285 }
1286
1287 int parse_options(int argc, char *argv[])
1288 {
1289         int job_files, i;
1290
1291         f_out = stdout;
1292         f_err = stderr;
1293
1294         fio_options_fill_optstring();
1295         fio_options_dup_and_init(l_opts);
1296
1297         if (setup_thread_area())
1298                 return 1;
1299         if (fill_def_thread())
1300                 return 1;
1301
1302         job_files = parse_cmd_line(argc, argv);
1303
1304         for (i = 0; i < job_files; i++) {
1305                 if (fill_def_thread())
1306                         return 1;
1307                 if (parse_jobs_ini(ini_file[i], i))
1308                         return 1;
1309                 free(ini_file[i]);
1310         }
1311
1312         free(ini_file);
1313         options_mem_free(&def_thread);
1314
1315         if (!thread_number) {
1316                 if (dump_cmdline)
1317                         return 0;
1318                 if (exec_profile)
1319                         return 0;
1320
1321                 log_err("No jobs(s) defined\n\n");
1322                 usage(argv[0]);
1323                 return 1;
1324         }
1325
1326         if (def_thread.o.gtod_offload) {
1327                 fio_gtod_init();
1328                 fio_gtod_offload = 1;
1329                 fio_gtod_cpu = def_thread.o.gtod_cpu;
1330         }
1331
1332         log_info("%s\n", fio_version_string);
1333         return 0;
1334 }