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
  22 static char fio_version_string[] = "fio 1.21-rc1";
  23
  24 #define FIO_RANDSEED            (0xb1899bedUL)
  25
  26 static char **ini_file;
  27 static int max_jobs = MAX_JOBS;
  28 static int dump_cmdline;
  29
  30 struct thread_data def_thread;
  31 struct thread_data *threads = NULL;
  32
  33 int exitall_on_terminate = 0;
  34 int terse_output = 0;
  35 int eta_print;
  36 unsigned long long mlock_size = 0;
  37 FILE *f_out = NULL;
  38 FILE *f_err = NULL;
  39 char *job_section = NULL;
  40
  41 int write_bw_log = 0;
  42 int read_only = 0;
  43
  44 static int def_timeout;
  45 static int write_lat_log;
  46
  47 static int prev_group_jobs;
  48
  49 unsigned long fio_debug = 0;
  50 unsigned int fio_debug_jobno = -1;
  51 unsigned int *fio_debug_jobp = NULL;
  52
  53 /*
  54  * Command line options. These will contain the above, plus a few
  55  * extra that only pertain to fio itself and not jobs.
  56  */
  57 static struct option l_opts[FIO_NR_OPTIONS] = {
  58         {
  59                 .name           = "output",
  60                 .has_arg        = required_argument,
  61                 .val            = 'o',
  62         },
  63         {
  64                 .name           = "timeout",
  65                 .has_arg        = required_argument,
  66                 .val            = 't',
  67         },
  68         {
  69                 .name           = "latency-log",
  70                 .has_arg        = required_argument,
  71                 .val            = 'l',
  72         },
  73         {
  74                 .name           = "bandwidth-log",
  75                 .has_arg        = required_argument,
  76                 .val            = 'b',
  77         },
  78         {
  79                 .name           = "minimal",
  80                 .has_arg        = optional_argument,
  81                 .val            = 'm',
  82         },
  83         {
  84                 .name           = "version",
  85                 .has_arg        = no_argument,
  86                 .val            = 'v',
  87         },
  88         {
  89                 .name           = "help",
  90                 .has_arg        = no_argument,
  91                 .val            = 'h',
  92         },
  93         {
  94                 .name           = "cmdhelp",
  95                 .has_arg        = optional_argument,
  96                 .val            = 'c',
  97         },
  98         {
  99                 .name           = "showcmd",
 100                 .has_arg        = no_argument,
 101                 .val            = 's',
 102         },
 103         {
 104                 .name           = "readonly",
 105                 .has_arg        = no_argument,
 106                 .val            = 'r',
 107         },
 108         {
 109                 .name           = "eta",
 110                 .has_arg        = required_argument,
 111                 .val            = 'e',
 112         },
 113         {
 114                 .name           = "debug",
 115                 .has_arg        = required_argument,
 116                 .val            = 'd',
 117         },
 118         {
 119                 .name           = "section",
 120                 .has_arg        = required_argument,
 121                 .val            = 'x',
 122         },
 123         {
 124                 .name           = "alloc-size",
 125                 .has_arg        = required_argument,
 126                 .val            = 'a',
 127         },
 128         {
 129                 .name           = NULL,
 130         },
 131 };
 132
 133 FILE *get_f_out()
 134 {
 135         return f_out;
 136 }
 137
 138 FILE *get_f_err()
 139 {
 140         return f_err;
 141 }
 142
 143 /*
 144  * Return a free job structure.
 145  */
 146 static struct thread_data *get_new_job(int global, struct thread_data *parent)
 147 {
 148         struct thread_data *td;
 149
 150         if (global)
 151                 return &def_thread;
 152         if (thread_number >= max_jobs)
 153                 return NULL;
 154
 155         td = &threads[thread_number++];
 156         *td = *parent;
 157
 158         dup_files(td, parent);
 159         options_mem_dupe(td);
 160
 161         td->thread_number = thread_number;
 162         return td;
 163 }
 164
 165 static void put_job(struct thread_data *td)
 166 {
 167         if (td == &def_thread)
 168                 return;
 169
 170         if (td->error)
 171                 log_info("fio: %s\n", td->verror);
 172
 173         memset(&threads[td->thread_number - 1], 0, sizeof(*td));
 174         thread_number--;
 175 }
 176
 177 static int setup_rate(struct thread_data *td)
 178 {
 179         unsigned long nr_reads_per_msec;
 180         unsigned long long rate;
 181         unsigned int bs;
 182
 183         if (!td->o.rate && !td->o.rate_iops)
 184                 return 0;
 185
 186         if (td_rw(td))
 187                 bs = td->o.rw_min_bs;
 188         else if (td_read(td))
 189                 bs = td->o.min_bs[DDIR_READ];
 190         else
 191                 bs = td->o.min_bs[DDIR_WRITE];
 192
 193         if (td->o.rate) {
 194                 rate = td->o.rate;
 195                 nr_reads_per_msec = (rate * 1024 * 1000LL) / bs;
 196         } else
 197                 nr_reads_per_msec = td->o.rate_iops * 1000UL;
 198
 199         if (!nr_reads_per_msec) {
 200                 log_err("rate lower than supported\n");
 201                 return -1;
 202         }
 203
 204         td->rate_usec_cycle = 1000000000ULL / nr_reads_per_msec;
 205         td->rate_pending_usleep = 0;
 206         return 0;
 207 }
 208
 209 /*
 210  * Lazy way of fixing up options that depend on each other. We could also
 211  * define option callback handlers, but this is easier.
 212  */
 213 static int fixup_options(struct thread_data *td)
 214 {
 215         struct thread_options *o = &td->o;
 216
 217         if (read_only && td_write(td)) {
 218                 log_err("fio: job <%s> has write bit set, but fio is in"
 219                         " read-only mode\n", td->o.name);
 220                 return 1;
 221         }
 222
 223         if (o->rwmix[DDIR_READ] + o->rwmix[DDIR_WRITE] > 100)
 224                 o->rwmix[DDIR_WRITE] = 100 - o->rwmix[DDIR_READ];
 225
 226         if (o->write_iolog_file && o->read_iolog_file) {
 227                 log_err("fio: read iolog overrides write_iolog\n");
 228                 free(o->write_iolog_file);
 229                 o->write_iolog_file = NULL;
 230         }
 231
 232         /*
 233          * only really works for sequential io for now, and with 1 file
 234          */
 235         if (o->zone_size && td_random(td) && o->open_files == 1)
 236                 o->zone_size = 0;
 237
 238         /*
 239          * Reads can do overwrites, we always need to pre-create the file
 240          */
 241         if (td_read(td) || td_rw(td))
 242                 o->overwrite = 1;
 243
 244         if (!o->min_bs[DDIR_READ])
 245                 o->min_bs[DDIR_READ] = o->bs[DDIR_READ];
 246         if (!o->max_bs[DDIR_READ])
 247                 o->max_bs[DDIR_READ] = o->bs[DDIR_READ];
 248         if (!o->min_bs[DDIR_WRITE])
 249                 o->min_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 250         if (!o->max_bs[DDIR_WRITE])
 251                 o->max_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
 252
 253         o->rw_min_bs = min(o->min_bs[DDIR_READ], o->min_bs[DDIR_WRITE]);
 254
 255         if (!o->file_size_high)
 256                 o->file_size_high = o->file_size_low;
 257
 258         if (o->norandommap && o->verify != VERIFY_NONE) {
 259                 log_err("fio: norandommap given, verify disabled\n");
 260                 o->verify = VERIFY_NONE;
 261         }
 262         if (o->bs_unaligned && (o->odirect || td->io_ops->flags & FIO_RAWIO))
 263                 log_err("fio: bs_unaligned may not work with raw io\n");
 264
 265         /*
 266          * thinktime_spin must be less than thinktime
 267          */
 268         if (o->thinktime_spin > o->thinktime)
 269                 o->thinktime_spin = o->thinktime;
 270
 271         /*
 272          * The low water mark cannot be bigger than the iodepth
 273          */
 274         if (o->iodepth_low > o->iodepth || !o->iodepth_low) {
 275                 /*
 276                  * syslet work around - if the workload is sequential,
 277                  * we want to let the queue drain all the way down to
 278                  * avoid seeking between async threads
 279                  */
 280                 if (!strcmp(td->io_ops->name, "syslet-rw") && !td_random(td))
 281                         o->iodepth_low = 1;
 282                 else
 283                         o->iodepth_low = o->iodepth;
 284         }
 285
 286         /*
 287          * If batch number isn't set, default to the same as iodepth
 288          */
 289         if (o->iodepth_batch > o->iodepth || !o->iodepth_batch)
 290                 o->iodepth_batch = o->iodepth;
 291
 292         if (o->nr_files > td->files_index)
 293                 o->nr_files = td->files_index;
 294
 295         if (o->open_files > o->nr_files || !o->open_files)
 296                 o->open_files = o->nr_files;
 297
 298         if ((o->rate && o->rate_iops) || (o->ratemin && o->rate_iops_min)) {
 299                 log_err("fio: rate and rate_iops are mutually exclusive\n");
 300                 return 1;
 301         }
 302         if ((o->rate < o->ratemin) || (o->rate_iops < o->rate_iops_min)) {
 303                 log_err("fio: minimum rate exceeds rate\n");
 304                 return 1;
 305         }
 306
 307         if (!o->timeout && o->time_based) {
 308                 log_err("fio: time_based requires a runtime/timeout setting\n");
 309                 o->time_based = 0;
 310         }
 311
 312         if (o->fill_device && !o->size)
 313                 o->size = ULONG_LONG_MAX;
 314
 315         if (td_rw(td) && td->o.verify != VERIFY_NONE)
 316                 log_info("fio: mixed read/write workload with verify. May not "
 317                  "work as expected, unless you pre-populated the file\n");
 318
 319         if (td->o.verify != VERIFY_NONE)
 320                 td->o.refill_buffers = 1;
 321
 322         return 0;
 323 }
 324
 325 /*
 326  * This function leaks the buffer
 327  */
 328 static char *to_kmg(unsigned int val)
 329 {
 330         char *buf = malloc(32);
 331         char post[] = { 0, 'K', 'M', 'G', 'P', 'E', 0 };
 332         char *p = post;
 333
 334         do {
 335                 if (val & 1023)
 336                         break;
 337
 338                 val >>= 10;
 339                 p++;
 340         } while (*p);
 341
 342         snprintf(buf, 31, "%u%c", val, *p);
 343         return buf;
 344 }
 345
 346 /* External engines are specified by "external:name.o") */
 347 static const char *get_engine_name(const char *str)
 348 {
 349         char *p = strstr(str, ":");
 350
 351         if (!p)
 352                 return str;
 353
 354         p++;
 355         strip_blank_front(&p);
 356         strip_blank_end(p);
 357         return p;
 358 }
 359
 360 static int exists_and_not_file(const char *filename)
 361 {
 362         struct stat sb;
 363
 364         if (lstat(filename, &sb) == -1)
 365                 return 0;
 366
 367         if (S_ISREG(sb.st_mode))
 368                 return 0;
 369
 370         return 1;
 371 }
 372
 373 /*
 374  * Initialize the various random states we need (random io, block size ranges,
 375  * read/write mix, etc).
 376  */
 377 static int init_random_state(struct thread_data *td)
 378 {
 379         unsigned long seeds[6];
 380         int fd;
 381
 382         fd = open("/dev/urandom", O_RDONLY);
 383         if (fd == -1) {
 384                 td_verror(td, errno, "open");
 385                 return 1;
 386         }
 387
 388         if (read(fd, seeds, sizeof(seeds)) < (int) sizeof(seeds)) {
 389                 td_verror(td, EIO, "read");
 390                 close(fd);
 391                 return 1;
 392         }
 393
 394         close(fd);
 395
 396         os_random_seed(seeds[0], &td->bsrange_state);
 397         os_random_seed(seeds[1], &td->verify_state);
 398         os_random_seed(seeds[2], &td->rwmix_state);
 399
 400         if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
 401                 os_random_seed(seeds[3], &td->next_file_state);
 402
 403         os_random_seed(seeds[5], &td->file_size_state);
 404
 405         if (!td_random(td))
 406                 return 0;
 407
 408         if (td->o.rand_repeatable)
 409                 seeds[4] = FIO_RANDSEED * td->thread_number;
 410
 411         os_random_seed(seeds[4], &td->random_state);
 412         return 0;
 413 }
 414
 415 /*
 416  * Adds a job to the list of things todo. Sanitizes the various options
 417  * to make sure we don't have conflicts, and initializes various
 418  * members of td.
 419  */
 420 static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
 421 {
 422         const char *ddir_str[] = { NULL, "read", "write", "rw", NULL,
 423                                    "randread", "randwrite", "randrw" };
 424         unsigned int i;
 425         const char *engine;
 426         char fname[PATH_MAX];
 427         int numjobs, file_alloced;
 428
 429         /*
 430          * the def_thread is just for options, it's not a real job
 431          */
 432         if (td == &def_thread)
 433                 return 0;
 434
 435         /*
 436          * if we are just dumping the output command line, don't add the job
 437          */
 438         if (dump_cmdline) {
 439                 put_job(td);
 440                 return 0;
 441         }
 442
 443         engine = get_engine_name(td->o.ioengine);
 444         td->io_ops = load_ioengine(td, engine);
 445         if (!td->io_ops) {
 446                 log_err("fio: failed to load engine %s\n", engine);
 447                 goto err;
 448         }
 449
 450         if (td->o.use_thread)
 451                 nr_thread++;
 452         else
 453                 nr_process++;
 454
 455         if (td->o.odirect)
 456                 td->io_ops->flags |= FIO_RAWIO;
 457
 458         file_alloced = 0;
 459         if (!td->o.filename && !td->files_index && !td->o.read_iolog_file) {
 460                 file_alloced = 1;
 461
 462                 if (td->o.nr_files == 1 && exists_and_not_file(jobname))
 463                         add_file(td, jobname);
 464                 else {
 465                         for (i = 0; i < td->o.nr_files; i++) {
 466                                 sprintf(fname, "%s.%d.%d", jobname,
 467                                                         td->thread_number, i);
 468                                 add_file(td, fname);
 469                         }
 470                 }
 471         }
 472
 473         if (fixup_options(td))
 474                 goto err;
 475
 476         if (td->io_ops->flags & FIO_DISKLESSIO) {
 477                 struct fio_file *f;
 478
 479                 for_each_file(td, f, i)
 480                         f->real_file_size = -1ULL;
 481         }
 482
 483         td->mutex = fio_mutex_init(0);
 484
 485         td->ts.clat_stat[0].min_val = td->ts.clat_stat[1].min_val = ULONG_MAX;
 486         td->ts.slat_stat[0].min_val = td->ts.slat_stat[1].min_val = ULONG_MAX;
 487         td->ts.bw_stat[0].min_val = td->ts.bw_stat[1].min_val = ULONG_MAX;
 488         td->ddir_nr = td->o.ddir_nr;
 489
 490         if ((td->o.stonewall || td->o.numjobs > 1 || td->o.new_group)
 491              && prev_group_jobs) {
 492                 prev_group_jobs = 0;
 493                 groupid++;
 494         }
 495
 496         td->groupid = groupid;
 497         prev_group_jobs++;
 498
 499         if (init_random_state(td))
 500                 goto err;
 501
 502         if (setup_rate(td))
 503                 goto err;
 504
 505         if (td->o.write_lat_log) {
 506                 setup_log(&td->ts.slat_log);
 507                 setup_log(&td->ts.clat_log);
 508         }
 509         if (td->o.write_bw_log)
 510                 setup_log(&td->ts.bw_log);
 511
 512         if (!td->o.name)
 513                 td->o.name = strdup(jobname);
 514
 515         if (!terse_output) {
 516                 if (!job_add_num) {
 517                         if (!strcmp(td->io_ops->name, "cpuio")) {
 518                                 log_info("%s: ioengine=cpu, cpuload=%u,"
 519                                          " cpucycle=%u\n", td->o.name,
 520                                                         td->o.cpuload,
 521                                                         td->o.cpucycle);
 522                         } else {
 523                                 char *c1, *c2, *c3, *c4;
 524
 525                                 c1 = to_kmg(td->o.min_bs[DDIR_READ]);
 526                                 c2 = to_kmg(td->o.max_bs[DDIR_READ]);
 527                                 c3 = to_kmg(td->o.min_bs[DDIR_WRITE]);
 528                                 c4 = to_kmg(td->o.max_bs[DDIR_WRITE]);
 529
 530                                 log_info("%s: (g=%d): rw=%s, bs=%s-%s/%s-%s,"
 531                                          " ioengine=%s, iodepth=%u\n",
 532                                                 td->o.name, td->groupid,
 533                                                 ddir_str[td->o.td_ddir],
 534                                                 c1, c2, c3, c4,
 535                                                 td->io_ops->name,
 536                                                 td->o.iodepth);
 537
 538                                 free(c1);
 539                                 free(c2);
 540                                 free(c3);
 541                                 free(c4);
 542                         }
 543                 } else if (job_add_num == 1)
 544                         log_info("...\n");
 545         }
 546
 547         /*
 548          * recurse add identical jobs, clear numjobs and stonewall options
 549          * as they don't apply to sub-jobs
 550          */
 551         numjobs = td->o.numjobs;
 552         while (--numjobs) {
 553                 struct thread_data *td_new = get_new_job(0, td);
 554
 555                 if (!td_new)
 556                         goto err;
 557
 558                 td_new->o.numjobs = 1;
 559                 td_new->o.stonewall = 0;
 560                 td_new->o.new_group = 0;
 561
 562                 if (file_alloced) {
 563                         td_new->o.filename = NULL;
 564                         td_new->files_index = 0;
 565                         td_new->files = NULL;
 566                 }
 567
 568                 job_add_num = numjobs - 1;
 569
 570                 if (add_job(td_new, jobname, job_add_num))
 571                         goto err;
 572         }
 573
 574         return 0;
 575 err:
 576         put_job(td);
 577         return -1;
 578 }
 579
 580 static int skip_this_section(const char *name)
 581 {
 582         if (!job_section)
 583                 return 0;
 584         if (!strncmp(name, "global", 6))
 585                 return 0;
 586
 587         return strncmp(job_section, name, strlen(job_section));
 588 }
 589
 590 static int is_empty_or_comment(char *line)
 591 {
 592         unsigned int i;
 593
 594         for (i = 0; i < strlen(line); i++) {
 595                 if (line[i] == ';')
 596                         return 1;
 597                 if (line[i] == '#')
 598                         return 1;
 599                 if (!isspace(line[i]) && !iscntrl(line[i]))
 600                         return 0;
 601         }
 602
 603         return 1;
 604 }
 605
 606 /*
 607  * This is our [ini] type file parser.
 608  */
 609 static int parse_jobs_ini(char *file, int stonewall_flag)
 610 {
 611         unsigned int global;
 612         struct thread_data *td;
 613         char *string, *name;
 614         FILE *f;
 615         char *p;
 616         int ret = 0, stonewall;
 617         int first_sect = 1;
 618         int skip_fgets = 0;
 619         int inside_skip = 0;
 620
 621         if (!strcmp(file, "-"))
 622                 f = stdin;
 623         else
 624                 f = fopen(file, "r");
 625
 626         if (!f) {
 627                 perror("fopen job file");
 628                 return 1;
 629         }
 630
 631         string = malloc(4096);
 632
 633         /*
 634          * it's really 256 + small bit, 280 should suffice
 635          */
 636         name = malloc(280);
 637         memset(name, 0, 280);
 638
 639         stonewall = stonewall_flag;
 640         do {
 641                 /*
 642                  * if skip_fgets is set, we already have loaded a line we
 643                  * haven't handled.
 644                  */
 645                 if (!skip_fgets) {
 646                         p = fgets(string, 4095, f);
 647                         if (!p)
 648                                 break;
 649                 }
 650
 651                 skip_fgets = 0;
 652                 strip_blank_front(&p);
 653                 strip_blank_end(p);
 654
 655                 if (is_empty_or_comment(p))
 656                         continue;
 657                 if (sscanf(p, "[%255s]", name) != 1) {
 658                         if (inside_skip)
 659                                 continue;
 660                         log_err("fio: option <%s> outside of [] job section\n",
 661                                                                         p);
 662                         break;
 663                 }
 664
 665                 if (skip_this_section(name)) {
 666                         inside_skip = 1;
 667                         continue;
 668                 } else
 669                         inside_skip = 0;
 670
 671                 global = !strncmp(name, "global", 6);
 672
 673                 name[strlen(name) - 1] = '\0';
 674
 675                 if (dump_cmdline) {
 676                         if (first_sect)
 677                                 log_info("fio ");
 678                         if (!global)
 679                                 log_info("--name=%s ", name);
 680                         first_sect = 0;
 681                 }
 682
 683                 td = get_new_job(global, &def_thread);
 684                 if (!td) {
 685                         ret = 1;
 686                         break;
 687                 }
 688
 689                 /*
 690                  * Seperate multiple job files by a stonewall
 691                  */
 692                 if (!global && stonewall) {
 693                         td->o.stonewall = stonewall;
 694                         stonewall = 0;
 695                 }
 696
 697                 while ((p = fgets(string, 4096, f)) != NULL) {
 698                         if (is_empty_or_comment(p))
 699                                 continue;
 700
 701                         strip_blank_front(&p);
 702
 703                         /*
 704                          * new section, break out and make sure we don't
 705                          * fgets() a new line at the top.
 706                          */
 707                         if (p[0] == '[') {
 708                                 skip_fgets = 1;
 709                                 break;
 710                         }
 711
 712                         strip_blank_end(p);
 713
 714                         /*
 715                          * Don't break here, continue parsing options so we
 716                          * dump all the bad ones. Makes trial/error fixups
 717                          * easier on the user.
 718                          */
 719                         ret |= fio_option_parse(td, p);
 720                         if (!ret && dump_cmdline)
 721                                 log_info("--%s ", p);
 722                 }
 723
 724                 if (!ret)
 725                         ret = add_job(td, name, 0);
 726                 else {
 727                         log_err("fio: job %s dropped\n", name);
 728                         put_job(td);
 729                 }
 730         } while (!ret);
 731
 732         if (dump_cmdline)
 733                 log_info("\n");
 734
 735         free(string);
 736         free(name);
 737         if (f != stdin)
 738                 fclose(f);
 739         return ret;
 740 }
 741
 742 static int fill_def_thread(void)
 743 {
 744         memset(&def_thread, 0, sizeof(def_thread));
 745
 746         fio_getaffinity(getpid(), &def_thread.o.cpumask);
 747
 748         /*
 749          * fill default options
 750          */
 751         fio_fill_default_options(&def_thread);
 752
 753         def_thread.o.timeout = def_timeout;
 754         def_thread.o.write_bw_log = write_bw_log;
 755         def_thread.o.write_lat_log = write_lat_log;
 756
 757         return 0;
 758 }
 759
 760 static void free_shm(void)
 761 {
 762         struct shmid_ds sbuf;
 763
 764         if (threads) {
 765                 void *tp = threads;
 766
 767                 threads = NULL;
 768                 file_hash_exit();
 769                 fio_debug_jobp = NULL;
 770                 shmdt(tp);
 771                 shmctl(shm_id, IPC_RMID, &sbuf);
 772         }
 773
 774         scleanup();
 775 }
 776
 777 /*
 778  * The thread area is shared between the main process and the job
 779  * threads/processes. So setup a shared memory segment that will hold
 780  * all the job info. We use the end of the region for keeping track of
 781  * open files across jobs, for file sharing.
 782  */
 783 static int setup_thread_area(void)
 784 {
 785         void *hash;
 786
 787         /*
 788          * 1024 is too much on some machines, scale max_jobs if
 789          * we get a failure that looks like too large a shm segment
 790          */
 791         do {
 792                 size_t size = max_jobs * sizeof(struct thread_data);
 793
 794                 size += file_hash_size;
 795                 size += sizeof(unsigned int);
 796
 797                 shm_id = shmget(0, size, IPC_CREAT | 0600);
 798                 if (shm_id != -1)
 799                         break;
 800                 if (errno != EINVAL) {
 801                         perror("shmget");
 802                         break;
 803                 }
 804
 805                 max_jobs >>= 1;
 806         } while (max_jobs);
 807
 808         if (shm_id == -1)
 809                 return 1;
 810
 811         threads = shmat(shm_id, NULL, 0);
 812         if (threads == (void *) -1) {
 813                 perror("shmat");
 814                 return 1;
 815         }
 816
 817         memset(threads, 0, max_jobs * sizeof(struct thread_data));
 818         hash = (void *) threads + max_jobs * sizeof(struct thread_data);
 819         fio_debug_jobp = (void *) hash + file_hash_size;
 820         *fio_debug_jobp = -1;
 821         file_hash_init(hash);
 822         atexit(free_shm);
 823         return 0;
 824 }
 825
 826 static void usage(const char *name)
 827 {
 828         printf("%s\n", fio_version_string);
 829         printf("%s [options] [job options] <job file(s)>\n", name);
 830         printf("\t--debug=options\tEnable debug logging\n");
 831         printf("\t--output\tWrite output to file\n");
 832         printf("\t--timeout\tRuntime in seconds\n");
 833         printf("\t--latency-log\tGenerate per-job latency logs\n");
 834         printf("\t--bandwidth-log\tGenerate per-job bandwidth logs\n");
 835         printf("\t--minimal\tMinimal (terse) output\n");
 836         printf("\t--version\tPrint version info and exit\n");
 837         printf("\t--help\t\tPrint this page\n");
 838         printf("\t--cmdhelp=cmd\tPrint command help, \"all\" for all of"
 839                 " them\n");
 840         printf("\t--showcmd\tTurn a job file into command line options\n");
 841         printf("\t--eta=when\tWhen ETA estimate should be printed\n");
 842         printf("\t          \tMay be \"always\", \"never\" or \"auto\"\n");
 843         printf("\t--readonly\tTurn on safety read-only checks, preventing"
 844                 " writes\n");
 845         printf("\t--section=name\tOnly run specified section in job file\n");
 846         printf("\t--alloc-size=kb\tSet smalloc pool to this size in kb"
 847                 " (def 1024)\n");
 848 }
 849
 850 #ifdef FIO_INC_DEBUG
 851 struct debug_level debug_levels[] = {
 852         { .name = "process",    .shift = FD_PROCESS, },
 853         { .name = "file",       .shift = FD_FILE, },
 854         { .name = "io",         .shift = FD_IO, },
 855         { .name = "mem",        .shift = FD_MEM, },
 856         { .name = "blktrace",   .shift = FD_BLKTRACE },
 857         { .name = "verify",     .shift = FD_VERIFY },
 858         { .name = "random",     .shift = FD_RANDOM },
 859         { .name = "parse",      .shift = FD_PARSE },
 860         { .name = "diskutil",   .shift = FD_DISKUTIL },
 861         { .name = "job",        .shift = FD_JOB },
 862         { },
 863 };
 864
 865 static int set_debug(const char *string)
 866 {
 867         struct debug_level *dl;
 868         char *p = (char *) string;
 869         char *opt;
 870         int i;
 871
 872         if (!strcmp(string, "?") || !strcmp(string, "help")) {
 873                 int i;
 874
 875                 log_info("fio: dumping debug options:");
 876                 for (i = 0; debug_levels[i].name; i++) {
 877                         dl = &debug_levels[i];
 878                         log_info("%s,", dl->name);
 879                 }
 880                 log_info("all\n");
 881                 return 1;
 882         }
 883
 884         while ((opt = strsep(&p, ",")) != NULL) {
 885                 int found = 0;
 886
 887                 if (!strncmp(opt, "all", 3)) {
 888                         log_info("fio: set all debug options\n");
 889                         fio_debug = ~0UL;
 890                         continue;
 891                 }
 892
 893                 for (i = 0; debug_levels[i].name; i++) {
 894                         dl = &debug_levels[i];
 895                         found = !strncmp(opt, dl->name, strlen(dl->name));
 896                         if (!found)
 897                                 continue;
 898
 899                         if (dl->shift == FD_JOB) {
 900                                 opt = strchr(opt, ':');
 901                                 if (!opt) {
 902                                         log_err("fio: missing job number\n");
 903                                         break;
 904                                 }
 905                                 opt++;
 906                                 fio_debug_jobno = atoi(opt);
 907                                 log_info("fio: set debug jobno %d\n",
 908                                                         fio_debug_jobno);
 909                         } else {
 910                                 log_info("fio: set debug option %s\n", opt);
 911                                 fio_debug |= (1UL << dl->shift);
 912                         }
 913                         break;
 914                 }
 915
 916                 if (!found)
 917                         log_err("fio: debug mask %s not found\n", opt);
 918         }
 919         return 0;
 920 }
 921 #else
 922 static void set_debug(const char *string)
 923 {
 924         log_err("fio: debug tracing not included in build\n");
 925         return 1;
 926 }
 927 #endif
 928
 929 static int parse_cmd_line(int argc, char *argv[])
 930 {
 931         struct thread_data *td = NULL;
 932         int c, ini_idx = 0, lidx, ret = 0, do_exit = 0, exit_val = 0;
 933
 934         while ((c = getopt_long_only(argc, argv, "", l_opts, &lidx)) != -1) {
 935                 switch (c) {
 936                 case 'a':
 937                         smalloc_pool_size = atoi(optarg);
 938                         break;
 939                 case 't':
 940                         def_timeout = atoi(optarg);
 941                         break;
 942                 case 'l':
 943                         write_lat_log = 1;
 944                         break;
 945                 case 'w':
 946                         write_bw_log = 1;
 947                         break;
 948                 case 'o':
 949                         f_out = fopen(optarg, "w+");
 950                         if (!f_out) {
 951                                 perror("fopen output");
 952                                 exit(1);
 953                         }
 954                         f_err = f_out;
 955                         break;
 956                 case 'm':
 957                         terse_output = 1;
 958                         break;
 959                 case 'h':
 960                         usage(argv[0]);
 961                         exit(0);
 962                 case 'c':
 963                         exit(fio_show_option_help(optarg));
 964                 case 's':
 965                         dump_cmdline = 1;
 966                         break;
 967                 case 'r':
 968                         read_only = 1;
 969                         break;
 970                 case 'v':
 971                         printf("%s\n", fio_version_string);
 972                         exit(0);
 973                 case 'e':
 974                         if (!strcmp("always", optarg))
 975                                 eta_print = FIO_ETA_ALWAYS;
 976                         else if (!strcmp("never", optarg))
 977                                 eta_print = FIO_ETA_NEVER;
 978                         break;
 979                 case 'd':
 980                         if (set_debug(optarg))
 981                                 do_exit++;
 982                         break;
 983                 case 'x':
 984                         if (!strcmp(optarg, "global")) {
 985                                 log_err("fio: can't use global as only "
 986                                         "section\n");
 987                                 do_exit++;
 988                                 exit_val = 1;
 989                                 break;
 990                         }
 991                         if (job_section)
 992                                 free(job_section);
 993                         job_section = strdup(optarg);
 994                         break;
 995                 case FIO_GETOPT_JOB: {
 996                         const char *opt = l_opts[lidx].name;
 997                         char *val = optarg;
 998
 999                         if (!strncmp(opt, "name", 4) && td) {
1000                                 ret = add_job(td, td->o.name ?: "fio", 0);
1001                                 if (ret) {
1002                                         put_job(td);
1003                                         return 0;
1004                                 }
1005                                 td = NULL;
1006                         }
1007                         if (!td) {
1008                                 int is_section = !strncmp(opt, "name", 4);
1009                                 int global = 0;
1010
1011                                 if (!is_section || !strncmp(val, "global", 6))
1012                                         global = 1;
1013
1014                                 if (is_section && skip_this_section(val))
1015                                         continue;
1016
1017                                 td = get_new_job(global, &def_thread);
1018                                 if (!td)
1019                                         return 0;
1020                         }
1021
1022                         ret = fio_cmd_option_parse(td, opt, val);
1023                         break;
1024                 }
1025                 default:
1026                         do_exit++;
1027                         exit_val = 1;
1028                         break;
1029                 }
1030         }
1031
1032         if (do_exit)
1033                 exit(exit_val);
1034
1035         if (td) {
1036                 if (!ret)
1037                         ret = add_job(td, td->o.name ?: "fio", 0);
1038                 if (ret)
1039                         put_job(td);
1040         }
1041
1042         while (optind < argc) {
1043                 ini_idx++;
1044                 ini_file = realloc(ini_file, ini_idx * sizeof(char *));
1045                 ini_file[ini_idx - 1] = strdup(argv[optind]);
1046                 optind++;
1047         }
1048
1049         return ini_idx;
1050 }
1051
1052 int parse_options(int argc, char *argv[])
1053 {
1054         int job_files, i;
1055
1056         f_out = stdout;
1057         f_err = stderr;
1058
1059         fio_options_dup_and_init(l_opts);
1060
1061         if (setup_thread_area())
1062                 return 1;
1063         if (fill_def_thread())
1064                 return 1;
1065
1066         job_files = parse_cmd_line(argc, argv);
1067
1068         for (i = 0; i < job_files; i++) {
1069                 if (fill_def_thread())
1070                         return 1;
1071                 if (parse_jobs_ini(ini_file[i], i))
1072                         return 1;
1073                 free(ini_file[i]);
1074         }
1075
1076         free(ini_file);
1077         options_mem_free(&def_thread);
1078
1079         if (!thread_number) {
1080                 if (dump_cmdline)
1081                         return 0;
1082
1083                 log_err("No jobs defined(s)\n");
1084                 usage(argv[0]);
1085                 return 1;
1086         }
1087
1088         return 0;
1089 }