init.c

   1 /*
   2  * This file contains job initialization and setup functions.
   3  */
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <unistd.h>
   7 #include <fcntl.h>
   8 #include <ctype.h>
   9 #include <string.h>
  10 #include <errno.h>
  11 #include <getopt.h>
  12 #include <sys/ipc.h>
  13 #include <sys/shm.h>
  14 #include <sys/types.h>
  15 #include <sys/stat.h>
  16
  17 #include "fio.h"
  18 #include "parse.h"
  19 #include "smalloc.h"
  20 #include "filehash.h"
  21 #include "verify.h"
  22
  23 static char fio_version_string[] = "fio 1.28";
  24
  25 #define FIO_RANDSEED            (0xb1899bedUL)
  26
  27 static char **ini_file;
  28 static int max_jobs = MAX_JOBS;
  29 static int dump_cmdline;
  30
  31 static struct thread_data def_thread;
  32 struct thread_data *threads = NULL;
  33
  34 int exitall_on_terminate = 0;
  35 int terse_output = 0;
  36 int eta_print;
  37 unsigned long long mlock_size = 0;
  38 FILE *f_out = NULL;
  39 FILE *f_err = NULL;
  40 char *job_section = NULL;
  41
  42 int write_bw_log = 0;
  43 int read_only = 0;
  44
  45 static int def_timeout;
  46 static int write_lat_log;
  47
  48 static int prev_group_jobs;
  49
  50 unsigned long fio_debug = 0;
  51 unsigned int fio_debug_jobno = -1;
  52 unsigned int *fio_debug_jobp = NULL;
  53
  54 /*
  55  * Command line options. These will contain the above, plus a few
  56  * extra that only pertain to fio itself and not jobs.
  57  */
  58 static struct option l_opts[FIO_NR_OPTIONS] = {
  59         {
  60                 .name           = "output",
  61                 .has_arg        = required_argument,
  62                 .val            = 'o',
  63         },
  64         {
  65                 .name           = "timeout",
  66                 .has_arg        = required_argument,
  67                 .val            = 't',
  68         },
  69         {
  70                 .name           = "latency-log",
  71                 .has_arg        = required_argument,
  72                 .val            = 'l',
  73         },
  74         {
  75                 .name           = "bandwidth-log",
  76                 .has_arg        = required_argument,
  77                 .val            = 'b',
  78         },
  79         {
  80                 .name           = "minimal",
  81                 .has_arg        = optional_argument,
  82                 .val            = 'm',
  83         },
  84         {
  85                 .name           = "version",
  86                 .has_arg        = no_argument,
  87                 .val            = 'v',
  88         },
  89         {
  90                 .name           = "help",
  91                 .has_arg        = no_argument,
  92                 .val            = 'h',
  93         },
  94         {
  95                 .name           = "cmdhelp",
  96                 .has_arg        = optional_argument,
  97                 .val            = 'c',
  98         },
  99         {
 100                 .name           = "showcmd",
 101                 .has_arg        = no_argument,
 102                 .val            = 's',
 103         },
 104         {
 105                 .name           = "readonly",
 106                 .has_arg        = no_argument,
 107                 .val            = 'r',
 108         },
 109         {
 110                 .name           = "eta",
 111                 .has_arg        = required_argument,
 112                 .val            = 'e',
 113         },
 114         {
 115                 .name           = "debug",
 116                 .has_arg        = required_argument,
 117                 .val            = 'd',
 118         },
 119         {
 120                 .name           = "section",
 121                 .has_arg        = required_argument,
 122                 .val            = 'x',
 123         },
 124         {
 125                 .name           = "alloc-size",
 126                 .has_arg        = required_argument,
 127                 .val            = 'a',
 128         },
 129         {
 130                 .name           = NULL,
 131         },
 132 };
 133
 134 FILE *get_f_out()
 135 {
 136         return f_out;
 137 }
 138
 139 FILE *get_f_err()
 140 {
 141         return f_err;
 142 }
 143
 144 /*
 145  * Return a free job structure.
 146  */
 147 static struct thread_data *get_new_job(int global, struct thread_data *parent)
 148 {
 149         struct thread_data *td;
 150
 151         if (global)
 152                 return &def_thread;
 153         if (thread_number >= max_jobs)
 154                 return NULL;
 155
 156         td = &threads[thread_number++];
 157         *td = *parent;
 158
 159         dup_files(td, parent);
 160         options_mem_dupe(td);
 161
 162         td->thread_number = thread_number;
 163         return td;
 164 }
 165
 166 static void put_job(struct thread_data *td)
 167 {
 168         if (td == &def_thread)
 169                 return;
 170
 171         if (td->error)
 172                 log_info("fio: %s\n", td->verror);
 173
 174         memset(&threads[td->thread_number - 1], 0, sizeof(*td));
 175         thread_number--;
 176 }
 177
 178 static int __setup_rate(struct thread_data *td, enum fio_ddir ddir)
 179 {
 180         unsigned int bs = td->o.min_bs[ddir];
 181         unsigned long long rate;
 182         unsigned long ios_per_msec;
 183
 184         if (td->o.rate[ddir]) {
 185                 rate = td->o.rate[ddir];
 186                 ios_per_msec = (rate * 1000LL) / bs;
 187         } else
 188                 ios_per_msec = td->o.rate_iops[ddir] * 1000UL;
 189
 190         if (!ios_per_msec) {
 191                 log_err("rate lower than supported\n");
 192                 return -1;
 193         }
 194
 195         td->rate_usec_cycle[ddir] = 1000000000ULL / ios_per_msec;
 196         td->rate_pending_usleep[ddir] = 0;
 197         return 0;
 198 }
 199
 200 static int setup_rate(struct thread_data *td)
 201 {
 202         int ret = 0;
 203
 204         if (td->o.rate[DDIR_READ] || td->o.rate_iops[DDIR_READ])
 205                 ret = __setup_rate(td, DDIR_READ);
 206         if (td->o.rate[DDIR_WRITE] || td->o.rate_iops[DDIR_WRITE])
 207                 ret |= __setup_rate(td, DDIR_WRITE);
 208
 209         return ret;
 210 }
 211
 212 static int fixed_block_size(struct thread_options *o)
 213 {
 214         return o->min_bs[DDIR_READ] == o->max_bs[DDIR_READ] &&
 215                 o->min_bs[DDIR_WRITE] == o->max_bs[DDIR_WRITE] &&
 216                 o->min_bs[DDIR_READ] == o->min_bs[DDIR_WRITE];
 217 }
 218
 219 /*
 220  * Lazy way of fixing up options that depend on each other. We could also
 221  * define option callback handlers, but this is easier.
 222  */
 223 static int fixup_options(struct thread_data *td)
 224 {
 225         struct thread_options *o = &td->o;
 226
 227 #ifndef FIO_HAVE_PSHARED_MUTEX
 228         if (!td->o.use_thread) {
 229                 log_info("fio: this platform does not support process shared"
 230                          " mutexes, forcing use of threads. Use the 'thread'"
 231                          " option to get rid of this warning.\n");
 232                 td->o.use_thread = 1;
 233         }
 234 #endif
 235
 236 #ifndef FIO_HAVE_CPU_AFFINITY
 237         if (td->o.gtod_cpu) {
 238                 log_err("fio: platform must support CPU affinity for"
 239                         "gettimeofday() offloading\n");
 240                 return 1;
 241         }
 242 #endif
 243
 244 #if 0
 245         if (read_only && td_write(td)) {
 246                 log_err("fio: job <%s> has write bit set, but fio is in"
 247                         " read-only mode\n", td->o.name);
 248                 return 1;
 249         }
 250 #endif
 251
 252         if (o->write_iolog_file && o->read_iolog_file) {
 253                 log_err("fio: read iolog overrides write_iolog\n");
 254                 free(o->write_iolog_file);
 255                 o->write_iolog_file = NULL;
 256         }
 257
 258         /*
 259          * only really works for sequential io for now, and with 1 file
 260          */
 261         if (o->zone_size && td_random(td) && o->open_files == 1)
 262                 o->zone_size = 0;
 263
 264         /*
 265          * Reads can do overwrites, we always need to pre-create the file
 266          */
 267         if (td_read(td) || td_rw(td))
 268                 o->overwrite = 1;
 269
 270         if (!o->min_bs[DDIR_READ])
 271                 o->min_bs[DDIR_READ] = o->bs[DDIR_READ];
 272         if (!o->max_bs[DDIR_READ])
 273                 o->max_bs[DDIR_READ] = o->bs[DDIR_READ];
 274         if (!o->min_bs[DDIR_WRITE])
 275                 o->min_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 276         if (!o->max_bs[DDIR_WRITE])
 277                 o->max_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 278
 279         o->rw_min_bs = min(o->min_bs[DDIR_READ], o->min_bs[DDIR_WRITE]);
 280
 281         /*
 282          * For random IO, allow blockalign offset other than min_bs.
 283          */
 284         if (!o->ba[DDIR_READ] || !td_random(td))
 285                 o->ba[DDIR_READ] = o->min_bs[DDIR_READ];
 286         if (!o->ba[DDIR_WRITE] || !td_random(td))
 287                 o->ba[DDIR_WRITE] = o->min_bs[DDIR_WRITE];
 288
 289         if ((o->ba[DDIR_READ] != o->min_bs[DDIR_READ] ||
 290             o->ba[DDIR_WRITE] != o->min_bs[DDIR_WRITE]) &&
 291             !td->o.norandommap) {
 292                 log_err("fio: Any use of blockalign= turns off randommap\n");
 293                 td->o.norandommap = 1;
 294         }
 295
 296         if (!o->file_size_high)
 297                 o->file_size_high = o->file_size_low;
 298
 299         if (o->norandommap && o->verify != VERIFY_NONE
 300             && !fixed_block_size(o))  {
 301                 log_err("fio: norandommap given for variable block sizes, "
 302                         "verify disabled\n");
 303                 o->verify = VERIFY_NONE;
 304         }
 305         if (o->bs_unaligned && (o->odirect || td->io_ops->flags & FIO_RAWIO))
 306                 log_err("fio: bs_unaligned may not work with raw io\n");
 307
 308         /*
 309          * thinktime_spin must be less than thinktime
 310          */
 311         if (o->thinktime_spin > o->thinktime)
 312                 o->thinktime_spin = o->thinktime;
 313
 314         /*
 315          * The low water mark cannot be bigger than the iodepth
 316          */
 317         if (o->iodepth_low > o->iodepth || !o->iodepth_low) {
 318                 /*
 319                  * syslet work around - if the workload is sequential,
 320                  * we want to let the queue drain all the way down to
 321                  * avoid seeking between async threads
 322                  */
 323                 if (!strcmp(td->io_ops->name, "syslet-rw") && !td_random(td))
 324                         o->iodepth_low = 1;
 325                 else
 326                         o->iodepth_low = o->iodepth;
 327         }
 328
 329         /*
 330          * If batch number isn't set, default to the same as iodepth
 331          */
 332         if (o->iodepth_batch > o->iodepth || !o->iodepth_batch)
 333                 o->iodepth_batch = o->iodepth;
 334
 335         if (o->nr_files > td->files_index)
 336                 o->nr_files = td->files_index;
 337
 338         if (o->open_files > o->nr_files || !o->open_files)
 339                 o->open_files = o->nr_files;
 340
 341         if (((o->rate[0] + o->rate[1]) && (o->rate_iops[0] + o->rate_iops[1]))||
 342             ((o->ratemin[0] + o->ratemin[1]) && (o->rate_iops_min[0] +
 343                 o->rate_iops_min[1]))) {
 344                 log_err("fio: rate and rate_iops are mutually exclusive\n");
 345                 return 1;
 346         }
 347         if ((o->rate[0] < o->ratemin[0]) || (o->rate[1] < o->ratemin[1]) ||
 348             (o->rate_iops[0] < o->rate_iops_min[0]) ||
 349             (o->rate_iops[1] < o->rate_iops_min[1])) {
 350                 log_err("fio: minimum rate exceeds rate\n");
 351                 return 1;
 352         }
 353
 354         if (!o->timeout && o->time_based) {
 355                 log_err("fio: time_based requires a runtime/timeout setting\n");
 356                 o->time_based = 0;
 357         }
 358
 359         if (o->fill_device && !o->size)
 360                 o->size = -1ULL;
 361
 362         if (td_rw(td) && td->o.verify != VERIFY_NONE)
 363                 log_info("fio: mixed read/write workload with verify. May not "
 364                  "work as expected, unless you pre-populated the file\n");
 365
 366         if (td->o.verify != VERIFY_NONE)
 367                 td->o.refill_buffers = 1;
 368
 369         if (td->o.pre_read)
 370                 td->o.invalidate_cache = 0;
 371
 372         if (td->o.mem_align) {
 373                 if (td->o.odirect && !is_power_of_2(td->o.mem_align)) {
 374                         log_err("fio: given IO mem alignment conflicts with"
 375                                         " direct=1. Resetting.\n");
 376                         td->o.mem_align = page_mask;
 377                 }
 378         }
 379
 380         return 0;
 381 }
 382
 383 /*
 384  * This function leaks the buffer
 385  */
 386 static char *to_kmg(unsigned int val)
 387 {
 388         char *buf = malloc(32);
 389         char post[] = { 0, 'K', 'M', 'G', 'P', 'E', 0 };
 390         char *p = post;
 391
 392         do {
 393                 if (val & 1023)
 394                         break;
 395
 396                 val >>= 10;
 397                 p++;
 398         } while (*p);
 399
 400         snprintf(buf, 31, "%u%c", val, *p);
 401         return buf;
 402 }
 403
 404 /* External engines are specified by "external:name.o") */
 405 static const char *get_engine_name(const char *str)
 406 {
 407         char *p = strstr(str, ":");
 408
 409         if (!p)
 410                 return str;
 411
 412         p++;
 413         strip_blank_front(&p);
 414         strip_blank_end(p);
 415         return p;
 416 }
 417
 418 static int exists_and_not_file(const char *filename)
 419 {
 420         struct stat sb;
 421
 422         if (lstat(filename, &sb) == -1)
 423                 return 0;
 424
 425         if (S_ISREG(sb.st_mode))
 426                 return 0;
 427
 428         return 1;
 429 }
 430
 431 void td_fill_rand_seeds(struct thread_data *td)
 432 {
 433         os_random_seed(td->rand_seeds[0], &td->bsrange_state);
 434         os_random_seed(td->rand_seeds[1], &td->verify_state);
 435         os_random_seed(td->rand_seeds[2], &td->rwmix_state);
 436
 437         if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
 438                 os_random_seed(td->rand_seeds[3], &td->next_file_state);
 439
 440         os_random_seed(td->rand_seeds[5], &td->file_size_state);
 441
 442         if (!td_random(td))
 443                 return;
 444
 445         if (td->o.rand_repeatable)
 446                 td->rand_seeds[4] = FIO_RANDSEED * td->thread_number;
 447
 448         os_random_seed(td->rand_seeds[4], &td->random_state);
 449 }
 450
 451 /*
 452  * Initialize the various random states we need (random io, block size ranges,
 453  * read/write mix, etc).
 454  */
 455 static int init_random_state(struct thread_data *td)
 456 {
 457         int fd;
 458
 459         fd = open("/dev/urandom", O_RDONLY);
 460         if (fd == -1) {
 461                 td_verror(td, errno, "open");
 462                 return 1;
 463         }
 464
 465         if (read(fd, td->rand_seeds, sizeof(td->rand_seeds)) <
 466             (int) sizeof(td->rand_seeds)) {
 467                 td_verror(td, EIO, "read");
 468                 close(fd);
 469                 return 1;
 470         }
 471
 472         close(fd);
 473         td_fill_rand_seeds(td);
 474         return 0;
 475 }
 476
 477 /*
 478  * Adds a job to the list of things todo. Sanitizes the various options
 479  * to make sure we don't have conflicts, and initializes various
 480  * members of td.
 481  */
 482 static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
 483 {
 484         const char *ddir_str[] = { NULL, "read", "write", "rw", NULL,
 485                                    "randread", "randwrite", "randrw" };
 486         unsigned int i;
 487         const char *engine;
 488         char fname[PATH_MAX];
 489         int numjobs, file_alloced;
 490
 491         /*
 492          * the def_thread is just for options, it's not a real job
 493          */
 494         if (td == &def_thread)
 495                 return 0;
 496
 497         /*
 498          * if we are just dumping the output command line, don't add the job
 499          */
 500         if (dump_cmdline) {
 501                 put_job(td);
 502                 return 0;
 503         }
 504
 505         engine = get_engine_name(td->o.ioengine);
 506         td->io_ops = load_ioengine(td, engine);
 507         if (!td->io_ops) {
 508                 log_err("fio: failed to load engine %s\n", engine);
 509                 goto err;
 510         }
 511
 512         if (td->o.use_thread)
 513                 nr_thread++;
 514         else
 515                 nr_process++;
 516
 517         if (td->o.odirect)
 518                 td->io_ops->flags |= FIO_RAWIO;
 519
 520         file_alloced = 0;
 521         if (!td->o.filename && !td->files_index && !td->o.read_iolog_file) {
 522                 file_alloced = 1;
 523
 524                 if (td->o.nr_files == 1 && exists_and_not_file(jobname))
 525                         add_file(td, jobname);
 526                 else {
 527                         for (i = 0; i < td->o.nr_files; i++) {
 528                                 sprintf(fname, "%s.%d.%d", jobname,
 529                                                         td->thread_number, i);
 530                                 add_file(td, fname);
 531                         }
 532                 }
 533         }
 534
 535         if (fixup_options(td))
 536                 goto err;
 537
 538         if (td->io_ops->flags & FIO_DISKLESSIO) {
 539                 struct fio_file *f;
 540
 541                 for_each_file(td, f, i)
 542                         f->real_file_size = -1ULL;
 543         }
 544
 545         td->mutex = fio_mutex_init(0);
 546
 547         td->ts.clat_stat[0].min_val = td->ts.clat_stat[1].min_val = ULONG_MAX;
 548         td->ts.slat_stat[0].min_val = td->ts.slat_stat[1].min_val = ULONG_MAX;
 549         td->ts.bw_stat[0].min_val = td->ts.bw_stat[1].min_val = ULONG_MAX;
 550         td->ddir_nr = td->o.ddir_nr;
 551
 552         if ((td->o.stonewall || td->o.numjobs > 1 || td->o.new_group)
 553              && prev_group_jobs) {
 554                 prev_group_jobs = 0;
 555                 groupid++;
 556         }
 557
 558         td->groupid = groupid;
 559         prev_group_jobs++;
 560
 561         if (init_random_state(td))
 562                 goto err;
 563
 564         if (setup_rate(td))
 565                 goto err;
 566
 567         if (td->o.write_lat_log) {
 568                 setup_log(&td->ts.slat_log);
 569                 setup_log(&td->ts.clat_log);
 570         }
 571         if (td->o.write_bw_log)
 572                 setup_log(&td->ts.bw_log);
 573
 574         if (!td->o.name)
 575                 td->o.name = strdup(jobname);
 576
 577         if (!terse_output) {
 578                 if (!job_add_num) {
 579                         if (!strcmp(td->io_ops->name, "cpuio")) {
 580                                 log_info("%s: ioengine=cpu, cpuload=%u,"
 581                                          " cpucycle=%u\n", td->o.name,
 582                                                         td->o.cpuload,
 583                                                         td->o.cpucycle);
 584                         } else {
 585                                 char *c1, *c2, *c3, *c4;
 586
 587                                 c1 = to_kmg(td->o.min_bs[DDIR_READ]);
 588                                 c2 = to_kmg(td->o.max_bs[DDIR_READ]);
 589                                 c3 = to_kmg(td->o.min_bs[DDIR_WRITE]);
 590                                 c4 = to_kmg(td->o.max_bs[DDIR_WRITE]);
 591
 592                                 log_info("%s: (g=%d): rw=%s, bs=%s-%s/%s-%s,"
 593                                          " ioengine=%s, iodepth=%u\n",
 594                                                 td->o.name, td->groupid,
 595                                                 ddir_str[td->o.td_ddir],
 596                                                 c1, c2, c3, c4,
 597                                                 td->io_ops->name,
 598                                                 td->o.iodepth);
 599
 600                                 free(c1);
 601                                 free(c2);
 602                                 free(c3);
 603                                 free(c4);
 604                         }
 605                 } else if (job_add_num == 1)
 606                         log_info("...\n");
 607         }
 608
 609         /*
 610          * recurse add identical jobs, clear numjobs and stonewall options
 611          * as they don't apply to sub-jobs
 612          */
 613         numjobs = td->o.numjobs;
 614         while (--numjobs) {
 615                 struct thread_data *td_new = get_new_job(0, td);
 616
 617                 if (!td_new)
 618                         goto err;
 619
 620                 td_new->o.numjobs = 1;
 621                 td_new->o.stonewall = 0;
 622                 td_new->o.new_group = 0;
 623
 624                 if (file_alloced) {
 625                         td_new->o.filename = NULL;
 626                         td_new->files_index = 0;
 627                         td_new->files_size = 0;
 628                         td_new->files = NULL;
 629                 }
 630
 631                 job_add_num = numjobs - 1;
 632
 633                 if (add_job(td_new, jobname, job_add_num))
 634                         goto err;
 635         }
 636
 637         return 0;
 638 err:
 639         put_job(td);
 640         return -1;
 641 }
 642
 643 static int skip_this_section(const char *name)
 644 {
 645         if (!job_section)
 646                 return 0;
 647         if (!strncmp(name, "global", 6))
 648                 return 0;
 649
 650         return strcmp(job_section, name);
 651 }
 652
 653 static int is_empty_or_comment(char *line)
 654 {
 655         unsigned int i;
 656
 657         for (i = 0; i < strlen(line); i++) {
 658                 if (line[i] == ';')
 659                         return 1;
 660                 if (line[i] == '#')
 661                         return 1;
 662                 if (!isspace(line[i]) && !iscntrl(line[i]))
 663                         return 0;
 664         }
 665
 666         return 1;
 667 }
 668
 669 /*
 670  * This is our [ini] type file parser.
 671  */
 672 static int parse_jobs_ini(char *file, int stonewall_flag)
 673 {
 674         unsigned int global;
 675         struct thread_data *td;
 676         char *string, *name;
 677         FILE *f;
 678         char *p;
 679         int ret = 0, stonewall;
 680         int first_sect = 1;
 681         int skip_fgets = 0;
 682         int inside_skip = 0;
 683         char **opts;
 684         int i, alloc_opts, num_opts;
 685
 686         if (!strcmp(file, "-"))
 687                 f = stdin;
 688         else
 689                 f = fopen(file, "r");
 690
 691         if (!f) {
 692                 perror("fopen job file");
 693                 return 1;
 694         }
 695
 696         string = malloc(4096);
 697
 698         /*
 699          * it's really 256 + small bit, 280 should suffice
 700          */
 701         name = malloc(280);
 702         memset(name, 0, 280);
 703
 704         alloc_opts = 8;
 705         opts = malloc(sizeof(char *) * alloc_opts);
 706         num_opts = 0;
 707
 708         stonewall = stonewall_flag;
 709         do {
 710                 /*
 711                  * if skip_fgets is set, we already have loaded a line we
 712                  * haven't handled.
 713                  */
 714                 if (!skip_fgets) {
 715                         p = fgets(string, 4095, f);
 716                         if (!p)
 717                                 break;
 718                 }
 719
 720                 skip_fgets = 0;
 721                 strip_blank_front(&p);
 722                 strip_blank_end(p);
 723
 724                 if (is_empty_or_comment(p))
 725                         continue;
 726                 if (sscanf(p, "[%255s]", name) != 1) {
 727                         if (inside_skip)
 728                                 continue;
 729                         log_err("fio: option <%s> outside of [] job section\n",
 730                                                                         p);
 731                         break;
 732                 }
 733
 734                 if (skip_this_section(name)) {
 735                         inside_skip = 1;
 736                         continue;
 737                 } else
 738                         inside_skip = 0;
 739
 740                 global = !strncmp(name, "global", 6);
 741
 742                 name[strlen(name) - 1] = '\0';
 743
 744                 if (dump_cmdline) {
 745                         if (first_sect)
 746                                 log_info("fio ");
 747                         if (!global)
 748                                 log_info("--name=%s ", name);
 749                         first_sect = 0;
 750                 }
 751
 752                 td = get_new_job(global, &def_thread);
 753                 if (!td) {
 754                         ret = 1;
 755                         break;
 756                 }
 757
 758                 /*
 759                  * Seperate multiple job files by a stonewall
 760                  */
 761                 if (!global && stonewall) {
 762                         td->o.stonewall = stonewall;
 763                         stonewall = 0;
 764                 }
 765
 766                 num_opts = 0;
 767                 memset(opts, 0, alloc_opts * sizeof(char *));
 768
 769                 while ((p = fgets(string, 4096, f)) != NULL) {
 770                         if (is_empty_or_comment(p))
 771                                 continue;
 772
 773                         strip_blank_front(&p);
 774
 775                         /*
 776                          * new section, break out and make sure we don't
 777                          * fgets() a new line at the top.
 778                          */
 779                         if (p[0] == '[') {
 780                                 skip_fgets = 1;
 781                                 break;
 782                         }
 783
 784                         strip_blank_end(p);
 785
 786                         if (num_opts == alloc_opts) {
 787                                 alloc_opts <<= 1;
 788                                 opts = realloc(opts,
 789                                                 alloc_opts * sizeof(char *));
 790                         }
 791
 792                         opts[num_opts] = strdup(p);
 793                         num_opts++;
 794                 }
 795
 796                 ret = fio_options_parse(td, opts, num_opts);
 797                 if (!ret) {
 798                         if (dump_cmdline)
 799                                 for (i = 0; i < num_opts; i++)
 800                                         log_info("--%s ", opts[i]);
 801
 802                         ret = add_job(td, name, 0);
 803                 } else {
 804                         log_err("fio: job %s dropped\n", name);
 805                         put_job(td);
 806                 }
 807
 808                 for (i = 0; i < num_opts; i++)
 809                         free(opts[i]);
 810                 num_opts = 0;
 811         } while (!ret);
 812
 813         if (dump_cmdline)
 814                 log_info("\n");
 815
 816         for (i = 0; i < num_opts; i++)
 817                 free(opts[i]);
 818
 819         free(string);
 820         free(name);
 821         free(opts);
 822         if (f != stdin)
 823                 fclose(f);
 824         return ret;
 825 }
 826
 827 static int fill_def_thread(void)
 828 {
 829         memset(&def_thread, 0, sizeof(def_thread));
 830
 831         fio_getaffinity(getpid(), &def_thread.o.cpumask);
 832
 833         /*
 834          * fill default options
 835          */
 836         fio_fill_default_options(&def_thread);
 837
 838         def_thread.o.timeout = def_timeout;
 839         def_thread.o.write_bw_log = write_bw_log;
 840         def_thread.o.write_lat_log = write_lat_log;
 841
 842         return 0;
 843 }
 844
 845 static void free_shm(void)
 846 {
 847         struct shmid_ds sbuf;
 848
 849         if (threads) {
 850                 void *tp = threads;
 851
 852                 threads = NULL;
 853                 file_hash_exit();
 854                 fio_debug_jobp = NULL;
 855                 shmdt(tp);
 856                 shmctl(shm_id, IPC_RMID, &sbuf);
 857         }
 858
 859         scleanup();
 860 }
 861
 862 /*
 863  * The thread area is shared between the main process and the job
 864  * threads/processes. So setup a shared memory segment that will hold
 865  * all the job info. We use the end of the region for keeping track of
 866  * open files across jobs, for file sharing.
 867  */
 868 static int setup_thread_area(void)
 869 {
 870         void *hash;
 871
 872         /*
 873          * 1024 is too much on some machines, scale max_jobs if
 874          * we get a failure that looks like too large a shm segment
 875          */
 876         do {
 877                 size_t size = max_jobs * sizeof(struct thread_data);
 878
 879                 size += file_hash_size;
 880                 size += sizeof(unsigned int);
 881
 882                 shm_id = shmget(0, size, IPC_CREAT | 0600);
 883                 if (shm_id != -1)
 884                         break;
 885                 if (errno != EINVAL) {
 886                         perror("shmget");
 887                         break;
 888                 }
 889
 890                 max_jobs >>= 1;
 891         } while (max_jobs);
 892
 893         if (shm_id == -1)
 894                 return 1;
 895
 896         threads = shmat(shm_id, NULL, 0);
 897         if (threads == (void *) -1) {
 898                 perror("shmat");
 899                 return 1;
 900         }
 901
 902         memset(threads, 0, max_jobs * sizeof(struct thread_data));
 903         hash = (void *) threads + max_jobs * sizeof(struct thread_data);
 904         fio_debug_jobp = (void *) hash + file_hash_size;
 905         *fio_debug_jobp = -1;
 906         file_hash_init(hash);
 907         atexit(free_shm);
 908         return 0;
 909 }
 910
 911 static void usage(const char *name)
 912 {
 913         printf("%s\n", fio_version_string);
 914         printf("%s [options] [job options] <job file(s)>\n", name);
 915         printf("\t--debug=options\tEnable debug logging\n");
 916         printf("\t--output\tWrite output to file\n");
 917         printf("\t--timeout\tRuntime in seconds\n");
 918         printf("\t--latency-log\tGenerate per-job latency logs\n");
 919         printf("\t--bandwidth-log\tGenerate per-job bandwidth logs\n");
 920         printf("\t--minimal\tMinimal (terse) output\n");
 921         printf("\t--version\tPrint version info and exit\n");
 922         printf("\t--help\t\tPrint this page\n");
 923         printf("\t--cmdhelp=cmd\tPrint command help, \"all\" for all of"
 924                 " them\n");
 925         printf("\t--showcmd\tTurn a job file into command line options\n");
 926         printf("\t--eta=when\tWhen ETA estimate should be printed\n");
 927         printf("\t          \tMay be \"always\", \"never\" or \"auto\"\n");
 928         printf("\t--readonly\tTurn on safety read-only checks, preventing"
 929                 " writes\n");
 930         printf("\t--section=name\tOnly run specified section in job file\n");
 931         printf("\t--alloc-size=kb\tSet smalloc pool to this size in kb"
 932                 " (def 1024)\n");
 933         printf("\nFio was written by Jens Axboe <jens.axboe@oracle.com>\n");
 934 }
 935
 936 #ifdef FIO_INC_DEBUG
 937 struct debug_level debug_levels[] = {
 938         { .name = "process",    .shift = FD_PROCESS, },
 939         { .name = "file",       .shift = FD_FILE, },
 940         { .name = "io",         .shift = FD_IO, },
 941         { .name = "mem",        .shift = FD_MEM, },
 942         { .name = "blktrace",   .shift = FD_BLKTRACE },
 943         { .name = "verify",     .shift = FD_VERIFY },
 944         { .name = "random",     .shift = FD_RANDOM },
 945         { .name = "parse",      .shift = FD_PARSE },
 946         { .name = "diskutil",   .shift = FD_DISKUTIL },
 947         { .name = "job",        .shift = FD_JOB },
 948         { .name = "mutex",      .shift = FD_MUTEX },
 949         { .name = NULL, },
 950 };
 951
 952 static int set_debug(const char *string)
 953 {
 954         struct debug_level *dl;
 955         char *p = (char *) string;
 956         char *opt;
 957         int i;
 958
 959         if (!strcmp(string, "?") || !strcmp(string, "help")) {
 960                 int i;
 961
 962                 log_info("fio: dumping debug options:");
 963                 for (i = 0; debug_levels[i].name; i++) {
 964                         dl = &debug_levels[i];
 965                         log_info("%s,", dl->name);
 966                 }
 967                 log_info("all\n");
 968                 return 1;
 969         }
 970
 971         while ((opt = strsep(&p, ",")) != NULL) {
 972                 int found = 0;
 973
 974                 if (!strncmp(opt, "all", 3)) {
 975                         log_info("fio: set all debug options\n");
 976                         fio_debug = ~0UL;
 977                         continue;
 978                 }
 979
 980                 for (i = 0; debug_levels[i].name; i++) {
 981                         dl = &debug_levels[i];
 982                         found = !strncmp(opt, dl->name, strlen(dl->name));
 983                         if (!found)
 984                                 continue;
 985
 986                         if (dl->shift == FD_JOB) {
 987                                 opt = strchr(opt, ':');
 988                                 if (!opt) {
 989                                         log_err("fio: missing job number\n");
 990                                         break;
 991                                 }
 992                                 opt++;
 993                                 fio_debug_jobno = atoi(opt);
 994                                 log_info("fio: set debug jobno %d\n",
 995                                                         fio_debug_jobno);
 996                         } else {
 997                                 log_info("fio: set debug option %s\n", opt);
 998                                 fio_debug |= (1UL << dl->shift);
 999                         }
1000                         break;
1001                 }
1002
1003                 if (!found)
1004                         log_err("fio: debug mask %s not found\n", opt);
1005         }
1006         return 0;
1007 }
1008 #else
1009 static int set_debug(const char *string)
1010 {
1011         log_err("fio: debug tracing not included in build\n");
1012         return 1;
1013 }
1014 #endif
1015
1016 static int parse_cmd_line(int argc, char *argv[])
1017 {
1018         struct thread_data *td = NULL;
1019         int c, ini_idx = 0, lidx, ret = 0, do_exit = 0, exit_val = 0;
1020
1021         while ((c = getopt_long_only(argc, argv, "", l_opts, &lidx)) != -1) {
1022                 switch (c) {
1023                 case 'a':
1024                         smalloc_pool_size = atoi(optarg);
1025                         break;
1026                 case 't':
1027                         def_timeout = atoi(optarg);
1028                         break;
1029                 case 'l':
1030                         write_lat_log = 1;
1031                         break;
1032                 case 'w':
1033                         write_bw_log = 1;
1034                         break;
1035                 case 'o':
1036                         f_out = fopen(optarg, "w+");
1037                         if (!f_out) {
1038                                 perror("fopen output");
1039                                 exit(1);
1040                         }
1041                         f_err = f_out;
1042                         break;
1043                 case 'm':
1044                         terse_output = 1;
1045                         break;
1046                 case 'h':
1047                         usage(argv[0]);
1048                         exit(0);
1049                 case 'c':
1050                         exit(fio_show_option_help(optarg));
1051                 case 's':
1052                         dump_cmdline = 1;
1053                         break;
1054                 case 'r':
1055                         read_only = 1;
1056                         break;
1057                 case 'v':
1058                         printf("%s\n", fio_version_string);
1059                         exit(0);
1060                 case 'e':
1061                         if (!strcmp("always", optarg))
1062                                 eta_print = FIO_ETA_ALWAYS;
1063                         else if (!strcmp("never", optarg))
1064                                 eta_print = FIO_ETA_NEVER;
1065                         break;
1066                 case 'd':
1067                         if (set_debug(optarg))
1068                                 do_exit++;
1069                         break;
1070                 case 'x':
1071                         if (!strcmp(optarg, "global")) {
1072                                 log_err("fio: can't use global as only "
1073                                         "section\n");
1074                                 do_exit++;
1075                                 exit_val = 1;
1076                                 break;
1077                         }
1078                         if (job_section)
1079                                 free(job_section);
1080                         job_section = strdup(optarg);
1081                         break;
1082                 case FIO_GETOPT_JOB: {
1083                         const char *opt = l_opts[lidx].name;
1084                         char *val = optarg;
1085
1086                         if (!strncmp(opt, "name", 4) && td) {
1087                                 ret = add_job(td, td->o.name ?: "fio", 0);
1088                                 if (ret) {
1089                                         put_job(td);
1090                                         return 0;
1091                                 }
1092                                 td = NULL;
1093                         }
1094                         if (!td) {
1095                                 int is_section = !strncmp(opt, "name", 4);
1096                                 int global = 0;
1097
1098                                 if (!is_section || !strncmp(val, "global", 6))
1099                                         global = 1;
1100
1101                                 if (is_section && skip_this_section(val))
1102                                         continue;
1103
1104                                 td = get_new_job(global, &def_thread);
1105                                 if (!td)
1106                                         return 0;
1107                         }
1108
1109                         ret = fio_cmd_option_parse(td, opt, val);
1110                         break;
1111                 }
1112                 default:
1113                         do_exit++;
1114                         exit_val = 1;
1115                         break;
1116                 }
1117         }
1118
1119         if (do_exit)
1120                 exit(exit_val);
1121
1122         if (td) {
1123                 if (!ret)
1124                         ret = add_job(td, td->o.name ?: "fio", 0);
1125                 if (ret)
1126                         put_job(td);
1127         }
1128
1129         while (optind < argc) {
1130                 ini_idx++;
1131                 ini_file = realloc(ini_file, ini_idx * sizeof(char *));
1132                 ini_file[ini_idx - 1] = strdup(argv[optind]);
1133                 optind++;
1134         }
1135
1136         return ini_idx;
1137 }
1138
1139 int parse_options(int argc, char *argv[])
1140 {
1141         int job_files, i;
1142
1143         f_out = stdout;
1144         f_err = stderr;
1145
1146         fio_options_dup_and_init(l_opts);
1147
1148         if (setup_thread_area())
1149                 return 1;
1150         if (fill_def_thread())
1151                 return 1;
1152
1153         job_files = parse_cmd_line(argc, argv);
1154
1155         for (i = 0; i < job_files; i++) {
1156                 if (fill_def_thread())
1157                         return 1;
1158                 if (parse_jobs_ini(ini_file[i], i))
1159                         return 1;
1160                 free(ini_file[i]);
1161         }
1162
1163         free(ini_file);
1164         options_mem_free(&def_thread);
1165
1166         if (!thread_number) {
1167                 if (dump_cmdline)
1168                         return 0;
1169
1170                 log_err("No jobs defined(s)\n\n");
1171                 usage(argv[0]);
1172                 return 1;
1173         }
1174
1175         if (def_thread.o.gtod_offload) {
1176                 fio_gtod_init();
1177                 fio_gtod_offload = 1;
1178                 fio_gtod_cpu = def_thread.o.gtod_cpu;
1179         }
1180
1181         return 0;
1182 }