options.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <unistd.h>
   4 #include <ctype.h>
   5 #include <string.h>
   6 #include <assert.h>
   7 #include <libgen.h>
   8 #include <fcntl.h>
   9 #include <sys/types.h>
  10 #include <sys/stat.h>
  11
  12 #include "fio.h"
  13 #include "verify.h"
  14 #include "parse.h"
  15 #include "lib/fls.h"
  16 #include "options.h"
  17
  18 #include "crc/crc32c.h"
  19
  20 /*
  21  * Check if mmap/mmaphuge has a :/foo/bar/file at the end. If so, return that.
  22  */
  23 static char *get_opt_postfix(const char *str)
  24 {
  25         char *p = strstr(str, ":");
  26
  27         if (!p)
  28                 return NULL;
  29
  30         p++;
  31         strip_blank_front(&p);
  32         strip_blank_end(p);
  33         return strdup(p);
  34 }
  35
  36 static int converthexchartoint(char a)
  37 {
  38         int base;
  39
  40         switch(a) {
  41         case '0'...'9':
  42                 base = '0';
  43                 break;
  44         case 'A'...'F':
  45                 base = 'A' - 10;
  46                 break;
  47         case 'a'...'f':
  48                 base = 'a' - 10;
  49                 break;
  50         default:
  51                 base = 0;
  52         }
  53         return (a - base);
  54 }
  55
  56 static int bs_cmp(const void *p1, const void *p2)
  57 {
  58         const struct bssplit *bsp1 = p1;
  59         const struct bssplit *bsp2 = p2;
  60
  61         return bsp1->perc < bsp2->perc;
  62 }
  63
  64 static int bssplit_ddir(struct thread_data *td, int ddir, char *str)
  65 {
  66         struct bssplit *bssplit;
  67         unsigned int i, perc, perc_missing;
  68         unsigned int max_bs, min_bs;
  69         long long val;
  70         char *fname;
  71
  72         td->o.bssplit_nr[ddir] = 4;
  73         bssplit = malloc(4 * sizeof(struct bssplit));
  74
  75         i = 0;
  76         max_bs = 0;
  77         min_bs = -1;
  78         while ((fname = strsep(&str, ":")) != NULL) {
  79                 char *perc_str;
  80
  81                 if (!strlen(fname))
  82                         break;
  83
  84                 /*
  85                  * grow struct buffer, if needed
  86                  */
  87                 if (i == td->o.bssplit_nr[ddir]) {
  88                         td->o.bssplit_nr[ddir] <<= 1;
  89                         bssplit = realloc(bssplit, td->o.bssplit_nr[ddir]
  90                                                   * sizeof(struct bssplit));
  91                 }
  92
  93                 perc_str = strstr(fname, "/");
  94                 if (perc_str) {
  95                         *perc_str = '\0';
  96                         perc_str++;
  97                         perc = atoi(perc_str);
  98                         if (perc > 100)
  99                                 perc = 100;
 100                         else if (!perc)
 101                                 perc = -1;
 102                 } else
 103                         perc = -1;
 104
 105                 if (str_to_decimal(fname, &val, 1, td)) {
 106                         log_err("fio: bssplit conversion failed\n");
 107                         free(td->o.bssplit);
 108                         return 1;
 109                 }
 110
 111                 if (val > max_bs)
 112                         max_bs = val;
 113                 if (val < min_bs)
 114                         min_bs = val;
 115
 116                 bssplit[i].bs = val;
 117                 bssplit[i].perc = perc;
 118                 i++;
 119         }
 120
 121         td->o.bssplit_nr[ddir] = i;
 122
 123         /*
 124          * Now check if the percentages add up, and how much is missing
 125          */
 126         perc = perc_missing = 0;
 127         for (i = 0; i < td->o.bssplit_nr[ddir]; i++) {
 128                 struct bssplit *bsp = &bssplit[i];
 129
 130                 if (bsp->perc == (unsigned char) -1)
 131                         perc_missing++;
 132                 else
 133                         perc += bsp->perc;
 134         }
 135
 136         if (perc > 100) {
 137                 log_err("fio: bssplit percentages add to more than 100%%\n");
 138                 free(bssplit);
 139                 return 1;
 140         }
 141         /*
 142          * If values didn't have a percentage set, divide the remains between
 143          * them.
 144          */
 145         if (perc_missing) {
 146                 for (i = 0; i < td->o.bssplit_nr[ddir]; i++) {
 147                         struct bssplit *bsp = &bssplit[i];
 148
 149                         if (bsp->perc == (unsigned char) -1)
 150                                 bsp->perc = (100 - perc) / perc_missing;
 151                 }
 152         }
 153
 154         td->o.min_bs[ddir] = min_bs;
 155         td->o.max_bs[ddir] = max_bs;
 156
 157         /*
 158          * now sort based on percentages, for ease of lookup
 159          */
 160         qsort(bssplit, td->o.bssplit_nr[ddir], sizeof(struct bssplit), bs_cmp);
 161         td->o.bssplit[ddir] = bssplit;
 162         return 0;
 163
 164 }
 165
 166 static int str_bssplit_cb(void *data, const char *input)
 167 {
 168         struct thread_data *td = data;
 169         char *str, *p, *odir;
 170         int ret = 0;
 171
 172         p = str = strdup(input);
 173
 174         strip_blank_front(&str);
 175         strip_blank_end(str);
 176
 177         odir = strchr(str, ',');
 178         if (odir) {
 179                 ret = bssplit_ddir(td, DDIR_WRITE, odir + 1);
 180                 if (!ret) {
 181                         *odir = '\0';
 182                         ret = bssplit_ddir(td, DDIR_READ, str);
 183                 }
 184         } else {
 185                 char *op;
 186
 187                 op = strdup(str);
 188
 189                 ret = bssplit_ddir(td, DDIR_READ, str);
 190                 if (!ret)
 191                         ret = bssplit_ddir(td, DDIR_WRITE, op);
 192
 193                 free(op);
 194         }
 195
 196         free(p);
 197         return ret;
 198 }
 199
 200 static int str_rw_cb(void *data, const char *str)
 201 {
 202         struct thread_data *td = data;
 203         char *nr = get_opt_postfix(str);
 204
 205         td->o.ddir_seq_nr = 1;
 206         td->o.ddir_seq_add = 0;
 207
 208         if (!nr)
 209                 return 0;
 210
 211         if (td_random(td))
 212                 td->o.ddir_seq_nr = atoi(nr);
 213         else {
 214                 long long val;
 215
 216                 if (str_to_decimal(nr, &val, 1, td)) {
 217                         log_err("fio: rw postfix parsing failed\n");
 218                         free(nr);
 219                         return 1;
 220                 }
 221
 222                 td->o.ddir_seq_add = val;
 223         }
 224
 225         free(nr);
 226         return 0;
 227 }
 228
 229 #ifdef FIO_HAVE_LIBAIO
 230 static int str_libaio_cb(void *data, const char *str)
 231 {
 232         struct thread_data *td = data;
 233
 234         if (!strcmp(str, "userspace_reap")) {
 235                 td->o.userspace_libaio_reap = 1;
 236                 return 0;
 237         }
 238
 239         log_err("fio: bad libaio sub-option: %s\n", str);
 240         return 1;
 241 }
 242 #endif
 243
 244 static int str_mem_cb(void *data, const char *mem)
 245 {
 246         struct thread_data *td = data;
 247
 248         if (td->o.mem_type == MEM_MMAPHUGE || td->o.mem_type == MEM_MMAP) {
 249                 td->mmapfile = get_opt_postfix(mem);
 250                 if (td->o.mem_type == MEM_MMAPHUGE && !td->mmapfile) {
 251                         log_err("fio: mmaphuge:/path/to/file\n");
 252                         return 1;
 253                 }
 254         }
 255
 256         return 0;
 257 }
 258
 259 static int str_verify_cb(void *data, const char *mem)
 260 {
 261         struct thread_data *td = data;
 262
 263         if (td->o.verify != VERIFY_CRC32C_INTEL)
 264                 return 0;
 265
 266         if (!crc32c_intel_works()) {
 267                 log_info("fio: System does not support hw accelerated crc32c. Falling back to sw crc32c.\n");
 268                 td->o.verify = VERIFY_CRC32C;
 269         }
 270
 271         return 0;
 272 }
 273
 274 static int fio_clock_source_cb(void *data, const char *str)
 275 {
 276         struct thread_data *td = data;
 277
 278         fio_clock_source = td->o.clocksource;
 279         fio_time_init();
 280         return 0;
 281 }
 282
 283 static int str_lockmem_cb(void fio_unused *data, unsigned long long *val)
 284 {
 285         mlock_size = *val;
 286         return 0;
 287 }
 288
 289 static int str_rwmix_read_cb(void *data, unsigned long long *val)
 290 {
 291         struct thread_data *td = data;
 292
 293         td->o.rwmix[DDIR_READ] = *val;
 294         td->o.rwmix[DDIR_WRITE] = 100 - *val;
 295         return 0;
 296 }
 297
 298 static int str_rwmix_write_cb(void *data, unsigned long long *val)
 299 {
 300         struct thread_data *td = data;
 301
 302         td->o.rwmix[DDIR_WRITE] = *val;
 303         td->o.rwmix[DDIR_READ] = 100 - *val;
 304         return 0;
 305 }
 306
 307 #ifdef FIO_HAVE_IOPRIO
 308 static int str_prioclass_cb(void *data, unsigned long long *val)
 309 {
 310         struct thread_data *td = data;
 311         unsigned short mask;
 312
 313         /*
 314          * mask off old class bits, str_prio_cb() may have set a default class
 315          */
 316         mask = (1 << IOPRIO_CLASS_SHIFT) - 1;
 317         td->ioprio &= mask;
 318
 319         td->ioprio |= *val << IOPRIO_CLASS_SHIFT;
 320         td->ioprio_set = 1;
 321         return 0;
 322 }
 323
 324 static int str_prio_cb(void *data, unsigned long long *val)
 325 {
 326         struct thread_data *td = data;
 327
 328         td->ioprio |= *val;
 329
 330         /*
 331          * If no class is set, assume BE
 332          */
 333         if ((td->ioprio >> IOPRIO_CLASS_SHIFT) == 0)
 334                 td->ioprio |= IOPRIO_CLASS_BE << IOPRIO_CLASS_SHIFT;
 335
 336         td->ioprio_set = 1;
 337         return 0;
 338 }
 339 #endif
 340
 341 static int str_exitall_cb(void)
 342 {
 343         exitall_on_terminate = 1;
 344         return 0;
 345 }
 346
 347 #ifdef FIO_HAVE_CPU_AFFINITY
 348 static int str_cpumask_cb(void *data, unsigned long long *val)
 349 {
 350         struct thread_data *td = data;
 351         unsigned int i;
 352         long max_cpu;
 353         int ret;
 354
 355         ret = fio_cpuset_init(&td->o.cpumask);
 356         if (ret < 0) {
 357                 log_err("fio: cpuset_init failed\n");
 358                 td_verror(td, ret, "fio_cpuset_init");
 359                 return 1;
 360         }
 361
 362         max_cpu = cpus_online();
 363
 364         for (i = 0; i < sizeof(int) * 8; i++) {
 365                 if ((1 << i) & *val) {
 366                         if (i > max_cpu) {
 367                                 log_err("fio: CPU %d too large (max=%ld)\n", i,
 368                                                                 max_cpu);
 369                                 return 1;
 370                         }
 371                         dprint(FD_PARSE, "set cpu allowed %d\n", i);
 372                         fio_cpu_set(&td->o.cpumask, i);
 373                 }
 374         }
 375
 376         td->o.cpumask_set = 1;
 377         return 0;
 378 }
 379
 380 static int set_cpus_allowed(struct thread_data *td, os_cpu_mask_t *mask,
 381                             const char *input)
 382 {
 383         char *cpu, *str, *p;
 384         long max_cpu;
 385         int ret = 0;
 386
 387         ret = fio_cpuset_init(mask);
 388         if (ret < 0) {
 389                 log_err("fio: cpuset_init failed\n");
 390                 td_verror(td, ret, "fio_cpuset_init");
 391                 return 1;
 392         }
 393
 394         p = str = strdup(input);
 395
 396         strip_blank_front(&str);
 397         strip_blank_end(str);
 398
 399         max_cpu = cpus_online();
 400
 401         while ((cpu = strsep(&str, ",")) != NULL) {
 402                 char *str2, *cpu2;
 403                 int icpu, icpu2;
 404
 405                 if (!strlen(cpu))
 406                         break;
 407
 408                 str2 = cpu;
 409                 icpu2 = -1;
 410                 while ((cpu2 = strsep(&str2, "-")) != NULL) {
 411                         if (!strlen(cpu2))
 412                                 break;
 413
 414                         icpu2 = atoi(cpu2);
 415                 }
 416
 417                 icpu = atoi(cpu);
 418                 if (icpu2 == -1)
 419                         icpu2 = icpu;
 420                 while (icpu <= icpu2) {
 421                         if (icpu >= FIO_MAX_CPUS) {
 422                                 log_err("fio: your OS only supports up to"
 423                                         " %d CPUs\n", (int) FIO_MAX_CPUS);
 424                                 ret = 1;
 425                                 break;
 426                         }
 427                         if (icpu > max_cpu) {
 428                                 log_err("fio: CPU %d too large (max=%ld)\n",
 429                                                         icpu, max_cpu);
 430                                 ret = 1;
 431                                 break;
 432                         }
 433
 434                         dprint(FD_PARSE, "set cpu allowed %d\n", icpu);
 435                         fio_cpu_set(mask, icpu);
 436                         icpu++;
 437                 }
 438                 if (ret)
 439                         break;
 440         }
 441
 442         free(p);
 443         if (!ret)
 444                 td->o.cpumask_set = 1;
 445         return ret;
 446 }
 447
 448 static int str_cpus_allowed_cb(void *data, const char *input)
 449 {
 450         struct thread_data *td = data;
 451         int ret;
 452
 453         ret = set_cpus_allowed(td, &td->o.cpumask, input);
 454         if (!ret)
 455                 td->o.cpumask_set = 1;
 456
 457         return ret;
 458 }
 459
 460 static int str_verify_cpus_allowed_cb(void *data, const char *input)
 461 {
 462         struct thread_data *td = data;
 463         int ret;
 464
 465         ret = set_cpus_allowed(td, &td->o.verify_cpumask, input);
 466         if (!ret)
 467                 td->o.verify_cpumask_set = 1;
 468
 469         return ret;
 470 }
 471 #endif
 472
 473 #ifdef FIO_HAVE_TRIM
 474 static int str_verify_trim_cb(void *data, unsigned long long *val)
 475 {
 476         struct thread_data *td = data;
 477
 478         td->o.trim_percentage = *val;
 479         return 0;
 480 }
 481 #endif
 482
 483 static int str_fst_cb(void *data, const char *str)
 484 {
 485         struct thread_data *td = data;
 486         char *nr = get_opt_postfix(str);
 487
 488         td->file_service_nr = 1;
 489         if (nr) {
 490                 td->file_service_nr = atoi(nr);
 491                 free(nr);
 492         }
 493
 494         return 0;
 495 }
 496
 497 #ifdef FIO_HAVE_SYNC_FILE_RANGE
 498 static int str_sfr_cb(void *data, const char *str)
 499 {
 500         struct thread_data *td = data;
 501         char *nr = get_opt_postfix(str);
 502
 503         td->sync_file_range_nr = 1;
 504         if (nr) {
 505                 td->sync_file_range_nr = atoi(nr);
 506                 free(nr);
 507         }
 508
 509         return 0;
 510 }
 511 #endif
 512
 513 static int check_dir(struct thread_data *td, char *fname)
 514 {
 515 #if 0
 516         char file[PATH_MAX], *dir;
 517         int elen = 0;
 518
 519         if (td->o.directory) {
 520                 strcpy(file, td->o.directory);
 521                 strcat(file, "/");
 522                 elen = strlen(file);
 523         }
 524
 525         sprintf(file + elen, "%s", fname);
 526         dir = dirname(file);
 527
 528         {
 529         struct stat sb;
 530         /*
 531          * We can't do this on FIO_DISKLESSIO engines. The engine isn't loaded
 532          * yet, so we can't do this check right here...
 533          */
 534         if (lstat(dir, &sb) < 0) {
 535                 int ret = errno;
 536
 537                 log_err("fio: %s is not a directory\n", dir);
 538                 td_verror(td, ret, "lstat");
 539                 return 1;
 540         }
 541
 542         if (!S_ISDIR(sb.st_mode)) {
 543                 log_err("fio: %s is not a directory\n", dir);
 544                 return 1;
 545         }
 546         }
 547 #endif
 548
 549         return 0;
 550 }
 551
 552 /*
 553  * Return next file in the string. Files are separated with ':'. If the ':'
 554  * is escaped with a '\', then that ':' is part of the filename and does not
 555  * indicate a new file.
 556  */
 557 static char *get_next_file_name(char **ptr)
 558 {
 559         char *str = *ptr;
 560         char *p, *start;
 561
 562         if (!str || !strlen(str))
 563                 return NULL;
 564
 565         start = str;
 566         do {
 567                 /*
 568                  * No colon, we are done
 569                  */
 570                 p = strchr(str, ':');
 571                 if (!p) {
 572                         *ptr = NULL;
 573                         break;
 574                 }
 575
 576                 /*
 577                  * We got a colon, but it's the first character. Skip and
 578                  * continue
 579                  */
 580                 if (p == start) {
 581                         str = ++start;
 582                         continue;
 583                 }
 584
 585                 if (*(p - 1) != '\\') {
 586                         *p = '\0';
 587                         *ptr = p + 1;
 588                         break;
 589                 }
 590
 591                 memmove(p - 1, p, strlen(p) + 1);
 592                 str = p;
 593         } while (1);
 594
 595         return start;
 596 }
 597
 598 static int str_filename_cb(void *data, const char *input)
 599 {
 600         struct thread_data *td = data;
 601         char *fname, *str, *p;
 602
 603         p = str = strdup(input);
 604
 605         strip_blank_front(&str);
 606         strip_blank_end(str);
 607
 608         if (!td->files_index)
 609                 td->o.nr_files = 0;
 610
 611         while ((fname = get_next_file_name(&str)) != NULL) {
 612                 if (!strlen(fname))
 613                         break;
 614                 if (check_dir(td, fname)) {
 615                         free(p);
 616                         return 1;
 617                 }
 618                 add_file(td, fname);
 619                 td->o.nr_files++;
 620         }
 621
 622         free(p);
 623         return 0;
 624 }
 625
 626 static int str_directory_cb(void *data, const char fio_unused *str)
 627 {
 628         struct thread_data *td = data;
 629         struct stat sb;
 630
 631         if (lstat(td->o.directory, &sb) < 0) {
 632                 int ret = errno;
 633
 634                 log_err("fio: %s is not a directory\n", td->o.directory);
 635                 td_verror(td, ret, "lstat");
 636                 return 1;
 637         }
 638         if (!S_ISDIR(sb.st_mode)) {
 639                 log_err("fio: %s is not a directory\n", td->o.directory);
 640                 return 1;
 641         }
 642
 643         return 0;
 644 }
 645
 646 static int str_opendir_cb(void *data, const char fio_unused *str)
 647 {
 648         struct thread_data *td = data;
 649
 650         if (!td->files_index)
 651                 td->o.nr_files = 0;
 652
 653         return add_dir_files(td, td->o.opendir);
 654 }
 655
 656 static int str_verify_offset_cb(void *data, unsigned long long *off)
 657 {
 658         struct thread_data *td = data;
 659
 660         if (*off && *off < sizeof(struct verify_header)) {
 661                 log_err("fio: verify_offset too small\n");
 662                 return 1;
 663         }
 664
 665         td->o.verify_offset = *off;
 666         return 0;
 667 }
 668
 669 static int str_verify_pattern_cb(void *data, const char *input)
 670 {
 671         struct thread_data *td = data;
 672         long off;
 673         int i = 0, j = 0, len, k, base = 10;
 674         char* loc1, * loc2;
 675
 676         loc1 = strstr(input, "0x");
 677         loc2 = strstr(input, "0X");
 678         if (loc1 || loc2)
 679                 base = 16;
 680         off = strtol(input, NULL, base);
 681         if (off != LONG_MAX || errno != ERANGE) {
 682                 while (off) {
 683                         td->o.verify_pattern[i] = off & 0xff;
 684                         off >>= 8;
 685                         i++;
 686                 }
 687         } else {
 688                 len = strlen(input);
 689                 k = len - 1;
 690                 if (base == 16) {
 691                         if (loc1)
 692                                 j = loc1 - input + 2;
 693                         else
 694                                 j = loc2 - input + 2;
 695                 } else
 696                         return 1;
 697                 if (len - j < MAX_PATTERN_SIZE * 2) {
 698                         while (k >= j) {
 699                                 off = converthexchartoint(input[k--]);
 700                                 if (k >= j)
 701                                         off += (converthexchartoint(input[k--])
 702                                                 * 16);
 703                                 td->o.verify_pattern[i++] = (char) off;
 704                         }
 705                 }
 706         }
 707         td->o.verify_pattern_bytes = i;
 708         /*
 709          * VERIFY_META could already be set
 710          */
 711         if (td->o.verify == VERIFY_NONE)
 712                 td->o.verify = VERIFY_PATTERN;
 713         return 0;
 714 }
 715
 716 static int str_lockfile_cb(void *data, const char *str)
 717 {
 718         struct thread_data *td = data;
 719         char *nr = get_opt_postfix(str);
 720
 721         td->o.lockfile_batch = 1;
 722         if (nr) {
 723                 td->o.lockfile_batch = atoi(nr);
 724                 free(nr);
 725         }
 726
 727         return 0;
 728 }
 729
 730 static int str_write_bw_log_cb(void *data, const char *str)
 731 {
 732         struct thread_data *td = data;
 733
 734         if (str)
 735                 td->o.bw_log_file = strdup(str);
 736
 737         td->o.write_bw_log = 1;
 738         return 0;
 739 }
 740
 741 static int str_write_lat_log_cb(void *data, const char *str)
 742 {
 743         struct thread_data *td = data;
 744
 745         if (str)
 746                 td->o.lat_log_file = strdup(str);
 747
 748         td->o.write_lat_log = 1;
 749         return 0;
 750 }
 751
 752 static int str_gtod_reduce_cb(void *data, int *il)
 753 {
 754         struct thread_data *td = data;
 755         int val = *il;
 756
 757         td->o.disable_lat = !!val;
 758         td->o.disable_clat = !!val;
 759         td->o.disable_slat = !!val;
 760         td->o.disable_bw = !!val;
 761         if (val)
 762                 td->tv_cache_mask = 63;
 763
 764         return 0;
 765 }
 766
 767 static int str_gtod_cpu_cb(void *data, long long *il)
 768 {
 769         struct thread_data *td = data;
 770         int val = *il;
 771
 772         td->o.gtod_cpu = val;
 773         td->o.gtod_offload = 1;
 774         return 0;
 775 }
 776
 777 static int str_size_cb(void *data, unsigned long long *__val)
 778 {
 779         struct thread_data *td = data;
 780         unsigned long long v = *__val;
 781
 782         if (parse_is_percent(v)) {
 783                 td->o.size = 0;
 784                 td->o.size_percent = -1ULL - v;
 785         } else
 786                 td->o.size = v;
 787
 788         return 0;
 789 }
 790
 791 static int rw_verify(struct fio_option *o, void *data)
 792 {
 793         struct thread_data *td = data;
 794
 795         if (read_only && td_write(td)) {
 796                 log_err("fio: job <%s> has write bit set, but fio is in"
 797                         " read-only mode\n", td->o.name);
 798                 return 1;
 799         }
 800
 801         return 0;
 802 }
 803
 804 static int gtod_cpu_verify(struct fio_option *o, void *data)
 805 {
 806 #ifndef FIO_HAVE_CPU_AFFINITY
 807         struct thread_data *td = data;
 808
 809         if (td->o.gtod_cpu) {
 810                 log_err("fio: platform must support CPU affinity for"
 811                         "gettimeofday() offloading\n");
 812                 return 1;
 813         }
 814 #endif
 815
 816         return 0;
 817 }
 818
 819 static int kb_base_verify(struct fio_option *o, void *data)
 820 {
 821         struct thread_data *td = data;
 822
 823         if (td->o.kb_base != 1024 && td->o.kb_base != 1000) {
 824                 log_err("fio: kb_base set to nonsensical value: %u\n",
 825                                 td->o.kb_base);
 826                 return 1;
 827         }
 828
 829         return 0;
 830 }
 831
 832 /*
 833  * Map of job/command line options
 834  */
 835 static struct fio_option options[FIO_MAX_OPTS] = {
 836         {
 837                 .name   = "description",
 838                 .type   = FIO_OPT_STR_STORE,
 839                 .off1   = td_var_offset(description),
 840                 .help   = "Text job description",
 841         },
 842         {
 843                 .name   = "name",
 844                 .type   = FIO_OPT_STR_STORE,
 845                 .off1   = td_var_offset(name),
 846                 .help   = "Name of this job",
 847         },
 848         {
 849                 .name   = "directory",
 850                 .type   = FIO_OPT_STR_STORE,
 851                 .off1   = td_var_offset(directory),
 852                 .cb     = str_directory_cb,
 853                 .help   = "Directory to store files in",
 854         },
 855         {
 856                 .name   = "filename",
 857                 .type   = FIO_OPT_STR_STORE,
 858                 .off1   = td_var_offset(filename),
 859                 .cb     = str_filename_cb,
 860                 .prio   = -1, /* must come after "directory" */
 861                 .help   = "File(s) to use for the workload",
 862         },
 863         {
 864                 .name   = "kb_base",
 865                 .type   = FIO_OPT_INT,
 866                 .off1   = td_var_offset(kb_base),
 867                 .verify = kb_base_verify,
 868                 .prio   = 1,
 869                 .def    = "1024",
 870                 .help   = "How many bytes per KB for reporting (1000 or 1024)",
 871         },
 872         {
 873                 .name   = "lockfile",
 874                 .type   = FIO_OPT_STR,
 875                 .cb     = str_lockfile_cb,
 876                 .off1   = td_var_offset(file_lock_mode),
 877                 .help   = "Lock file when doing IO to it",
 878                 .parent = "filename",
 879                 .def    = "none",
 880                 .posval = {
 881                           { .ival = "none",
 882                             .oval = FILE_LOCK_NONE,
 883                             .help = "No file locking",
 884                           },
 885                           { .ival = "exclusive",
 886                             .oval = FILE_LOCK_EXCLUSIVE,
 887                             .help = "Exclusive file lock",
 888                           },
 889                           {
 890                             .ival = "readwrite",
 891                             .oval = FILE_LOCK_READWRITE,
 892                             .help = "Read vs write lock",
 893                           },
 894                 },
 895         },
 896         {
 897                 .name   = "opendir",
 898                 .type   = FIO_OPT_STR_STORE,
 899                 .off1   = td_var_offset(opendir),
 900                 .cb     = str_opendir_cb,
 901                 .help   = "Recursively add files from this directory and down",
 902         },
 903         {
 904                 .name   = "rw",
 905                 .alias  = "readwrite",
 906                 .type   = FIO_OPT_STR,
 907                 .cb     = str_rw_cb,
 908                 .off1   = td_var_offset(td_ddir),
 909                 .help   = "IO direction",
 910                 .def    = "read",
 911                 .verify = rw_verify,
 912                 .posval = {
 913                           { .ival = "read",
 914                             .oval = TD_DDIR_READ,
 915                             .help = "Sequential read",
 916                           },
 917                           { .ival = "write",
 918                             .oval = TD_DDIR_WRITE,
 919                             .help = "Sequential write",
 920                           },
 921                           { .ival = "randread",
 922                             .oval = TD_DDIR_RANDREAD,
 923                             .help = "Random read",
 924                           },
 925                           { .ival = "randwrite",
 926                             .oval = TD_DDIR_RANDWRITE,
 927                             .help = "Random write",
 928                           },
 929                           { .ival = "rw",
 930                             .oval = TD_DDIR_RW,
 931                             .help = "Sequential read and write mix",
 932                           },
 933                           { .ival = "randrw",
 934                             .oval = TD_DDIR_RANDRW,
 935                             .help = "Random read and write mix"
 936                           },
 937                 },
 938         },
 939         {
 940                 .name   = "rw_sequencer",
 941                 .type   = FIO_OPT_STR,
 942                 .off1   = td_var_offset(rw_seq),
 943                 .help   = "IO offset generator modifier",
 944                 .def    = "sequential",
 945                 .posval = {
 946                           { .ival = "sequential",
 947                             .oval = RW_SEQ_SEQ,
 948                             .help = "Generate sequential offsets",
 949                           },
 950                           { .ival = "identical",
 951                             .oval = RW_SEQ_IDENT,
 952                             .help = "Generate identical offsets",
 953                           },
 954                 },
 955         },
 956
 957         {
 958                 .name   = "ioengine",
 959                 .type   = FIO_OPT_STR_STORE,
 960                 .off1   = td_var_offset(ioengine),
 961                 .help   = "IO engine to use",
 962                 .def    = FIO_PREFERRED_ENGINE,
 963                 .posval = {
 964                           { .ival = "sync",
 965                             .help = "Use read/write",
 966                           },
 967                           { .ival = "psync",
 968                             .help = "Use pread/pwrite",
 969                           },
 970                           { .ival = "vsync",
 971                             .help = "Use readv/writev",
 972                           },
 973 #ifdef FIO_HAVE_LIBAIO
 974                           { .ival = "libaio",
 975                             .help = "Linux native asynchronous IO",
 976                             .cb   = str_libaio_cb,
 977                           },
 978 #endif
 979 #ifdef FIO_HAVE_POSIXAIO
 980                           { .ival = "posixaio",
 981                             .help = "POSIX asynchronous IO",
 982                           },
 983 #endif
 984 #ifdef FIO_HAVE_SOLARISAIO
 985                           { .ival = "solarisaio",
 986                             .help = "Solaris native asynchronous IO",
 987                           },
 988 #endif
 989 #ifdef FIO_HAVE_WINDOWSAIO
 990                           { .ival = "windowsaio",
 991                             .help = "Windows native asynchronous IO"
 992                           },
 993 #endif
 994                           { .ival = "mmap",
 995                             .help = "Memory mapped IO"
 996                           },
 997 #ifdef FIO_HAVE_SPLICE
 998                           { .ival = "splice",
 999                             .help = "splice/vmsplice based IO",
1000                           },
1001                           { .ival = "netsplice",
1002                             .help = "splice/vmsplice to/from the network",
1003                           },
1004 #endif
1005 #ifdef FIO_HAVE_SGIO
1006                           { .ival = "sg",
1007                             .help = "SCSI generic v3 IO",
1008                           },
1009 #endif
1010                           { .ival = "null",
1011                             .help = "Testing engine (no data transfer)",
1012                           },
1013                           { .ival = "net",
1014                             .help = "Network IO",
1015                           },
1016 #ifdef FIO_HAVE_SYSLET
1017                           { .ival = "syslet-rw",
1018                             .help = "syslet enabled async pread/pwrite IO",
1019                           },
1020 #endif
1021                           { .ival = "cpuio",
1022                             .help = "CPU cycle burner engine",
1023                           },
1024 #ifdef FIO_HAVE_GUASI
1025                           { .ival = "guasi",
1026                             .help = "GUASI IO engine",
1027                           },
1028 #endif
1029 #ifdef FIO_HAVE_BINJECT
1030                           { .ival = "binject",
1031                             .help = "binject direct inject block engine",
1032                           },
1033 #endif
1034 #ifdef FIO_HAVE_RDMA
1035                           { .ival = "rdma",
1036                             .help = "RDMA IO engine",
1037                           },
1038 #endif
1039                           { .ival = "external",
1040                             .help = "Load external engine (append name)",
1041                           },
1042                 },
1043         },
1044         {
1045                 .name   = "iodepth",
1046                 .type   = FIO_OPT_INT,
1047                 .off1   = td_var_offset(iodepth),
1048                 .help   = "Number of IO buffers to keep in flight",
1049                 .minval = 1,
1050                 .def    = "1",
1051         },
1052         {
1053                 .name   = "iodepth_batch",
1054                 .alias  = "iodepth_batch_submit",
1055                 .type   = FIO_OPT_INT,
1056                 .off1   = td_var_offset(iodepth_batch),
1057                 .help   = "Number of IO buffers to submit in one go",
1058                 .parent = "iodepth",
1059                 .minval = 1,
1060                 .def    = "1",
1061         },
1062         {
1063                 .name   = "iodepth_batch_complete",
1064                 .type   = FIO_OPT_INT,
1065                 .off1   = td_var_offset(iodepth_batch_complete),
1066                 .help   = "Number of IO buffers to retrieve in one go",
1067                 .parent = "iodepth",
1068                 .minval = 0,
1069                 .def    = "1",
1070         },
1071         {
1072                 .name   = "iodepth_low",
1073                 .type   = FIO_OPT_INT,
1074                 .off1   = td_var_offset(iodepth_low),
1075                 .help   = "Low water mark for queuing depth",
1076                 .parent = "iodepth",
1077         },
1078         {
1079                 .name   = "size",
1080                 .type   = FIO_OPT_STR_VAL,
1081                 .cb     = str_size_cb,
1082                 .help   = "Total size of device or files",
1083         },
1084         {
1085                 .name   = "fill_device",
1086                 .alias  = "fill_fs",
1087                 .type   = FIO_OPT_BOOL,
1088                 .off1   = td_var_offset(fill_device),
1089                 .help   = "Write until an ENOSPC error occurs",
1090                 .def    = "0",
1091         },
1092         {
1093                 .name   = "filesize",
1094                 .type   = FIO_OPT_STR_VAL,
1095                 .off1   = td_var_offset(file_size_low),
1096                 .off2   = td_var_offset(file_size_high),
1097                 .minval = 1,
1098                 .help   = "Size of individual files",
1099         },
1100         {
1101                 .name   = "offset",
1102                 .alias  = "fileoffset",
1103                 .type   = FIO_OPT_STR_VAL,
1104                 .off1   = td_var_offset(start_offset),
1105                 .help   = "Start IO from this offset",
1106                 .def    = "0",
1107         },
1108         {
1109                 .name   = "bs",
1110                 .alias  = "blocksize",
1111                 .type   = FIO_OPT_INT,
1112                 .off1   = td_var_offset(bs[DDIR_READ]),
1113                 .off2   = td_var_offset(bs[DDIR_WRITE]),
1114                 .minval = 1,
1115                 .help   = "Block size unit",
1116                 .def    = "4k",
1117                 .parent = "rw",
1118         },
1119         {
1120                 .name   = "ba",
1121                 .alias  = "blockalign",
1122                 .type   = FIO_OPT_INT,
1123                 .off1   = td_var_offset(ba[DDIR_READ]),
1124                 .off2   = td_var_offset(ba[DDIR_WRITE]),
1125                 .minval = 1,
1126                 .help   = "IO block offset alignment",
1127                 .parent = "rw",
1128         },
1129         {
1130                 .name   = "bsrange",
1131                 .alias  = "blocksize_range",
1132                 .type   = FIO_OPT_RANGE,
1133                 .off1   = td_var_offset(min_bs[DDIR_READ]),
1134                 .off2   = td_var_offset(max_bs[DDIR_READ]),
1135                 .off3   = td_var_offset(min_bs[DDIR_WRITE]),
1136                 .off4   = td_var_offset(max_bs[DDIR_WRITE]),
1137                 .minval = 1,
1138                 .help   = "Set block size range (in more detail than bs)",
1139                 .parent = "rw",
1140         },
1141         {
1142                 .name   = "bssplit",
1143                 .type   = FIO_OPT_STR,
1144                 .cb     = str_bssplit_cb,
1145                 .help   = "Set a specific mix of block sizes",
1146                 .parent = "rw",
1147         },
1148         {
1149                 .name   = "bs_unaligned",
1150                 .alias  = "blocksize_unaligned",
1151                 .type   = FIO_OPT_STR_SET,
1152                 .off1   = td_var_offset(bs_unaligned),
1153                 .help   = "Don't sector align IO buffer sizes",
1154                 .parent = "rw",
1155         },
1156         {
1157                 .name   = "randrepeat",
1158                 .type   = FIO_OPT_BOOL,
1159                 .off1   = td_var_offset(rand_repeatable),
1160                 .help   = "Use repeatable random IO pattern",
1161                 .def    = "1",
1162                 .parent = "rw",
1163         },
1164         {
1165                 .name   = "use_os_rand",
1166                 .type   = FIO_OPT_BOOL,
1167                 .off1   = td_var_offset(use_os_rand),
1168                 .help   = "Set to use OS random generator",
1169                 .def    = "0",
1170                 .parent = "rw",
1171         },
1172         {
1173                 .name   = "norandommap",
1174                 .type   = FIO_OPT_STR_SET,
1175                 .off1   = td_var_offset(norandommap),
1176                 .help   = "Accept potential duplicate random blocks",
1177                 .parent = "rw",
1178         },
1179         {
1180                 .name   = "softrandommap",
1181                 .type   = FIO_OPT_BOOL,
1182                 .off1   = td_var_offset(softrandommap),
1183                 .help   = "Set norandommap if randommap allocation fails",
1184                 .parent = "norandommap",
1185                 .def    = "0",
1186         },
1187         {
1188                 .name   = "nrfiles",
1189                 .alias  = "nr_files",
1190                 .type   = FIO_OPT_INT,
1191                 .off1   = td_var_offset(nr_files),
1192                 .help   = "Split job workload between this number of files",
1193                 .def    = "1",
1194         },
1195         {
1196                 .name   = "openfiles",
1197                 .type   = FIO_OPT_INT,
1198                 .off1   = td_var_offset(open_files),
1199                 .help   = "Number of files to keep open at the same time",
1200         },
1201         {
1202                 .name   = "file_service_type",
1203                 .type   = FIO_OPT_STR,
1204                 .cb     = str_fst_cb,
1205                 .off1   = td_var_offset(file_service_type),
1206                 .help   = "How to select which file to service next",
1207                 .def    = "roundrobin",
1208                 .posval = {
1209                           { .ival = "random",
1210                             .oval = FIO_FSERVICE_RANDOM,
1211                             .help = "Choose a file at random",
1212                           },
1213                           { .ival = "roundrobin",
1214                             .oval = FIO_FSERVICE_RR,
1215                             .help = "Round robin select files",
1216                           },
1217                           { .ival = "sequential",
1218                             .oval = FIO_FSERVICE_SEQ,
1219                             .help = "Finish one file before moving to the next",
1220                           },
1221                 },
1222                 .parent = "nrfiles",
1223         },
1224 #ifdef FIO_HAVE_FALLOCATE
1225         {
1226                 .name   = "fallocate",
1227                 .type   = FIO_OPT_STR,
1228                 .off1   = td_var_offset(fallocate_mode),
1229                 .help   = "Whether pre-allocation is performed when laying out files",
1230                 .def    = "posix",
1231                 .posval = {
1232                           { .ival = "none",
1233                             .oval = FIO_FALLOCATE_NONE,
1234                             .help = "Do not pre-allocate space",
1235                           },
1236                           { .ival = "posix",
1237                             .oval = FIO_FALLOCATE_POSIX,
1238                             .help = "Use posix_fallocate()",
1239                           },
1240 #ifdef FIO_HAVE_LINUX_FALLOCATE
1241                           { .ival = "keep",
1242                             .oval = FIO_FALLOCATE_KEEP_SIZE,
1243                             .help = "Use fallocate(..., FALLOC_FL_KEEP_SIZE, ...)",
1244                           },
1245 #endif
1246                           /* Compatibility with former boolean values */
1247                           { .ival = "0",
1248                             .oval = FIO_FALLOCATE_NONE,
1249                             .help = "Alias for 'none'",
1250                           },
1251                           { .ival = "1",
1252                             .oval = FIO_FALLOCATE_POSIX,
1253                             .help = "Alias for 'posix'",
1254                           },
1255                 },
1256         },
1257 #endif  /* FIO_HAVE_FALLOCATE */
1258         {
1259                 .name   = "fadvise_hint",
1260                 .type   = FIO_OPT_BOOL,
1261                 .off1   = td_var_offset(fadvise_hint),
1262                 .help   = "Use fadvise() to advise the kernel on IO pattern",
1263                 .def    = "1",
1264         },
1265         {
1266                 .name   = "fsync",
1267                 .type   = FIO_OPT_INT,
1268                 .off1   = td_var_offset(fsync_blocks),
1269                 .help   = "Issue fsync for writes every given number of blocks",
1270                 .def    = "0",
1271         },
1272         {
1273                 .name   = "fdatasync",
1274                 .type   = FIO_OPT_INT,
1275                 .off1   = td_var_offset(fdatasync_blocks),
1276                 .help   = "Issue fdatasync for writes every given number of blocks",
1277                 .def    = "0",
1278         },
1279         {
1280                 .name   = "write_barrier",
1281                 .type   = FIO_OPT_INT,
1282                 .off1   = td_var_offset(barrier_blocks),
1283                 .help   = "Make every Nth write a barrier write",
1284                 .def    = "0",
1285         },
1286 #ifdef FIO_HAVE_SYNC_FILE_RANGE
1287         {
1288                 .name   = "sync_file_range",
1289                 .posval = {
1290                           { .ival = "wait_before",
1291                             .oval = SYNC_FILE_RANGE_WAIT_BEFORE,
1292                             .help = "SYNC_FILE_RANGE_WAIT_BEFORE",
1293                             .or   = 1,
1294                           },
1295                           { .ival = "write",
1296                             .oval = SYNC_FILE_RANGE_WRITE,
1297                             .help = "SYNC_FILE_RANGE_WRITE",
1298                             .or   = 1,
1299                           },
1300                           {
1301                             .ival = "wait_after",
1302                             .oval = SYNC_FILE_RANGE_WAIT_AFTER,
1303                             .help = "SYNC_FILE_RANGE_WAIT_AFTER",
1304                             .or   = 1,
1305                           },
1306                 },
1307                 .type   = FIO_OPT_STR_MULTI,
1308                 .cb     = str_sfr_cb,
1309                 .off1   = td_var_offset(sync_file_range),
1310                 .help   = "Use sync_file_range()",
1311         },
1312 #endif
1313         {
1314                 .name   = "direct",
1315                 .type   = FIO_OPT_BOOL,
1316                 .off1   = td_var_offset(odirect),
1317                 .help   = "Use O_DIRECT IO (negates buffered)",
1318                 .def    = "0",
1319         },
1320         {
1321                 .name   = "buffered",
1322                 .type   = FIO_OPT_BOOL,
1323                 .off1   = td_var_offset(odirect),
1324                 .neg    = 1,
1325                 .help   = "Use buffered IO (negates direct)",
1326                 .def    = "1",
1327         },
1328         {
1329                 .name   = "overwrite",
1330                 .type   = FIO_OPT_BOOL,
1331                 .off1   = td_var_offset(overwrite),
1332                 .help   = "When writing, set whether to overwrite current data",
1333                 .def    = "0",
1334         },
1335         {
1336                 .name   = "loops",
1337                 .type   = FIO_OPT_INT,
1338                 .off1   = td_var_offset(loops),
1339                 .help   = "Number of times to run the job",
1340                 .def    = "1",
1341         },
1342         {
1343                 .name   = "numjobs",
1344                 .type   = FIO_OPT_INT,
1345                 .off1   = td_var_offset(numjobs),
1346                 .help   = "Duplicate this job this many times",
1347                 .def    = "1",
1348         },
1349         {
1350                 .name   = "startdelay",
1351                 .type   = FIO_OPT_STR_VAL_TIME,
1352                 .off1   = td_var_offset(start_delay),
1353                 .help   = "Only start job when this period has passed",
1354                 .def    = "0",
1355         },
1356         {
1357                 .name   = "runtime",
1358                 .alias  = "timeout",
1359                 .type   = FIO_OPT_STR_VAL_TIME,
1360                 .off1   = td_var_offset(timeout),
1361                 .help   = "Stop workload when this amount of time has passed",
1362                 .def    = "0",
1363         },
1364         {
1365                 .name   = "time_based",
1366                 .type   = FIO_OPT_STR_SET,
1367                 .off1   = td_var_offset(time_based),
1368                 .help   = "Keep running until runtime/timeout is met",
1369         },
1370         {
1371                 .name   = "ramp_time",
1372                 .type   = FIO_OPT_STR_VAL_TIME,
1373                 .off1   = td_var_offset(ramp_time),
1374                 .help   = "Ramp up time before measuring performance",
1375         },
1376         {
1377                 .name   = "clocksource",
1378                 .type   = FIO_OPT_STR,
1379                 .cb     = fio_clock_source_cb,
1380                 .off1   = td_var_offset(clocksource),
1381                 .help   = "What type of timing source to use",
1382                 .posval = {
1383                           { .ival = "gettimeofday",
1384                             .oval = CS_GTOD,
1385                             .help = "Use gettimeofday(2) for timing",
1386                           },
1387                           { .ival = "clock_gettime",
1388                             .oval = CS_CGETTIME,
1389                             .help = "Use clock_gettime(2) for timing",
1390                           },
1391 #ifdef ARCH_HAVE_CPU_CLOCK
1392                           { .ival = "cpu",
1393                             .oval = CS_CPUCLOCK,
1394                             .help = "Use CPU private clock",
1395                           },
1396 #endif
1397                 },
1398         },
1399         {
1400                 .name   = "mem",
1401                 .alias  = "iomem",
1402                 .type   = FIO_OPT_STR,
1403                 .cb     = str_mem_cb,
1404                 .off1   = td_var_offset(mem_type),
1405                 .help   = "Backing type for IO buffers",
1406                 .def    = "malloc",
1407                 .posval = {
1408                           { .ival = "malloc",
1409                             .oval = MEM_MALLOC,
1410                             .help = "Use malloc(3) for IO buffers",
1411                           },
1412                           { .ival = "shm",
1413                             .oval = MEM_SHM,
1414                             .help = "Use shared memory segments for IO buffers",
1415                           },
1416 #ifdef FIO_HAVE_HUGETLB
1417                           { .ival = "shmhuge",
1418                             .oval = MEM_SHMHUGE,
1419                             .help = "Like shm, but use huge pages",
1420                           },
1421 #endif
1422                           { .ival = "mmap",
1423                             .oval = MEM_MMAP,
1424                             .help = "Use mmap(2) (file or anon) for IO buffers",
1425                           },
1426 #ifdef FIO_HAVE_HUGETLB
1427                           { .ival = "mmaphuge",
1428                             .oval = MEM_MMAPHUGE,
1429                             .help = "Like mmap, but use huge pages",
1430                           },
1431 #endif
1432                   },
1433         },
1434         {
1435                 .name   = "iomem_align",
1436                 .alias  = "mem_align",
1437                 .type   = FIO_OPT_INT,
1438                 .off1   = td_var_offset(mem_align),
1439                 .minval = 0,
1440                 .help   = "IO memory buffer offset alignment",
1441                 .def    = "0",
1442                 .parent = "iomem",
1443         },
1444         {
1445                 .name   = "verify",
1446                 .type   = FIO_OPT_STR,
1447                 .off1   = td_var_offset(verify),
1448                 .help   = "Verify data written",
1449                 .cb     = str_verify_cb,
1450                 .def    = "0",
1451                 .posval = {
1452                           { .ival = "0",
1453                             .oval = VERIFY_NONE,
1454                             .help = "Don't do IO verification",
1455                           },
1456                           { .ival = "md5",
1457                             .oval = VERIFY_MD5,
1458                             .help = "Use md5 checksums for verification",
1459                           },
1460                           { .ival = "crc64",
1461                             .oval = VERIFY_CRC64,
1462                             .help = "Use crc64 checksums for verification",
1463                           },
1464                           { .ival = "crc32",
1465                             .oval = VERIFY_CRC32,
1466                             .help = "Use crc32 checksums for verification",
1467                           },
1468                           { .ival = "crc32c-intel",
1469                             .oval = VERIFY_CRC32C_INTEL,
1470                             .help = "Use hw crc32c checksums for verification",
1471                           },
1472                           { .ival = "crc32c",
1473                             .oval = VERIFY_CRC32C,
1474                             .help = "Use crc32c checksums for verification",
1475                           },
1476                           { .ival = "crc16",
1477                             .oval = VERIFY_CRC16,
1478                             .help = "Use crc16 checksums for verification",
1479                           },
1480                           { .ival = "crc7",
1481                             .oval = VERIFY_CRC7,
1482                             .help = "Use crc7 checksums for verification",
1483                           },
1484                           { .ival = "sha1",
1485                             .oval = VERIFY_SHA1,
1486                             .help = "Use sha1 checksums for verification",
1487                           },
1488                           { .ival = "sha256",
1489                             .oval = VERIFY_SHA256,
1490                             .help = "Use sha256 checksums for verification",
1491                           },
1492                           { .ival = "sha512",
1493                             .oval = VERIFY_SHA512,
1494                             .help = "Use sha512 checksums for verification",
1495                           },
1496                           { .ival = "meta",
1497                             .oval = VERIFY_META,
1498                             .help = "Use io information",
1499                           },
1500                           {
1501                             .ival = "null",
1502                             .oval = VERIFY_NULL,
1503                             .help = "Pretend to verify",
1504                           },
1505                 },
1506         },
1507         {
1508                 .name   = "do_verify",
1509                 .type   = FIO_OPT_BOOL,
1510                 .off1   = td_var_offset(do_verify),
1511                 .help   = "Run verification stage after write",
1512                 .def    = "1",
1513                 .parent = "verify",
1514         },
1515         {
1516                 .name   = "verifysort",
1517                 .type   = FIO_OPT_BOOL,
1518                 .off1   = td_var_offset(verifysort),
1519                 .help   = "Sort written verify blocks for read back",
1520                 .def    = "1",
1521                 .parent = "verify",
1522         },
1523         {
1524                 .name   = "verify_interval",
1525                 .type   = FIO_OPT_INT,
1526                 .off1   = td_var_offset(verify_interval),
1527                 .minval = 2 * sizeof(struct verify_header),
1528                 .help   = "Store verify buffer header every N bytes",
1529                 .parent = "verify",
1530         },
1531         {
1532                 .name   = "verify_offset",
1533                 .type   = FIO_OPT_INT,
1534                 .help   = "Offset verify header location by N bytes",
1535                 .def    = "0",
1536                 .cb     = str_verify_offset_cb,
1537                 .parent = "verify",
1538         },
1539         {
1540                 .name   = "verify_pattern",
1541                 .type   = FIO_OPT_STR,
1542                 .cb     = str_verify_pattern_cb,
1543                 .help   = "Fill pattern for IO buffers",
1544                 .parent = "verify",
1545         },
1546         {
1547                 .name   = "verify_fatal",
1548                 .type   = FIO_OPT_BOOL,
1549                 .off1   = td_var_offset(verify_fatal),
1550                 .def    = "0",
1551                 .help   = "Exit on a single verify failure, don't continue",
1552                 .parent = "verify",
1553         },
1554         {
1555                 .name   = "verify_dump",
1556                 .type   = FIO_OPT_BOOL,
1557                 .off1   = td_var_offset(verify_dump),
1558                 .def    = "1",
1559                 .help   = "Dump contents of good and bad blocks on failure",
1560                 .parent = "verify",
1561         },
1562         {
1563                 .name   = "verify_async",
1564                 .type   = FIO_OPT_INT,
1565                 .off1   = td_var_offset(verify_async),
1566                 .def    = "0",
1567                 .help   = "Number of async verifier threads to use",
1568                 .parent = "verify",
1569         },
1570         {
1571                 .name   = "verify_backlog",
1572                 .type   = FIO_OPT_STR_VAL,
1573                 .off1   = td_var_offset(verify_backlog),
1574                 .help   = "Verify after this number of blocks are written",
1575                 .parent = "verify",
1576         },
1577         {
1578                 .name   = "verify_backlog_batch",
1579                 .type   = FIO_OPT_INT,
1580                 .off1   = td_var_offset(verify_batch),
1581                 .help   = "Verify this number of IO blocks",
1582                 .parent = "verify",
1583         },
1584 #ifdef FIO_HAVE_CPU_AFFINITY
1585         {
1586                 .name   = "verify_async_cpus",
1587                 .type   = FIO_OPT_STR,
1588                 .cb     = str_verify_cpus_allowed_cb,
1589                 .help   = "Set CPUs allowed for async verify threads",
1590                 .parent = "verify_async",
1591         },
1592 #endif
1593 #ifdef FIO_HAVE_TRIM
1594         {
1595                 .name   = "trim_percentage",
1596                 .type   = FIO_OPT_INT,
1597                 .cb     = str_verify_trim_cb,
1598                 .maxval = 100,
1599                 .help   = "Number of verify blocks to discard/trim",
1600                 .parent = "verify",
1601                 .def    = "0",
1602         },
1603         {
1604                 .name   = "trim_verify_zero",
1605                 .type   = FIO_OPT_INT,
1606                 .help   = "Verify that trim/discarded blocks are returned as zeroes",
1607                 .off1   = td_var_offset(trim_zero),
1608                 .parent = "trim_percentage",
1609                 .def    = "1",
1610         },
1611         {
1612                 .name   = "trim_backlog",
1613                 .type   = FIO_OPT_STR_VAL,
1614                 .off1   = td_var_offset(trim_backlog),
1615                 .help   = "Trim after this number of blocks are written",
1616                 .parent = "trim_percentage",
1617         },
1618         {
1619                 .name   = "trim_backlog_batch",
1620                 .type   = FIO_OPT_INT,
1621                 .off1   = td_var_offset(trim_batch),
1622                 .help   = "Trim this number of IO blocks",
1623                 .parent = "trim_percentage",
1624         },
1625 #endif
1626         {
1627                 .name   = "write_iolog",
1628                 .type   = FIO_OPT_STR_STORE,
1629                 .off1   = td_var_offset(write_iolog_file),
1630                 .help   = "Store IO pattern to file",
1631         },
1632         {
1633                 .name   = "read_iolog",
1634                 .type   = FIO_OPT_STR_STORE,
1635                 .off1   = td_var_offset(read_iolog_file),
1636                 .help   = "Playback IO pattern from file",
1637         },
1638         {
1639                 .name   = "replay_no_stall",
1640                 .type   = FIO_OPT_INT,
1641                 .off1   = td_var_offset(no_stall),
1642                 .def    = "0",
1643                 .parent = "read_iolog",
1644                 .help   = "Playback IO pattern file as fast as possible without stalls",
1645         },
1646         {
1647                 .name   = "replay_redirect",
1648                 .type   = FIO_OPT_STR_STORE,
1649                 .off1   = td_var_offset(replay_redirect),
1650                 .parent = "read_iolog",
1651                 .help   = "Replay all I/O onto this device, regardless of trace device",
1652         },
1653         {
1654                 .name   = "exec_prerun",
1655                 .type   = FIO_OPT_STR_STORE,
1656                 .off1   = td_var_offset(exec_prerun),
1657                 .help   = "Execute this file prior to running job",
1658         },
1659         {
1660                 .name   = "exec_postrun",
1661                 .type   = FIO_OPT_STR_STORE,
1662                 .off1   = td_var_offset(exec_postrun),
1663                 .help   = "Execute this file after running job",
1664         },
1665 #ifdef FIO_HAVE_IOSCHED_SWITCH
1666         {
1667                 .name   = "ioscheduler",
1668                 .type   = FIO_OPT_STR_STORE,
1669                 .off1   = td_var_offset(ioscheduler),
1670                 .help   = "Use this IO scheduler on the backing device",
1671         },
1672 #endif
1673         {
1674                 .name   = "zonesize",
1675                 .type   = FIO_OPT_STR_VAL,
1676                 .off1   = td_var_offset(zone_size),
1677                 .help   = "Give size of an IO zone",
1678                 .def    = "0",
1679         },
1680         {
1681                 .name   = "zoneskip",
1682                 .type   = FIO_OPT_STR_VAL,
1683                 .off1   = td_var_offset(zone_skip),
1684                 .help   = "Space between IO zones",
1685                 .def    = "0",
1686         },
1687         {
1688                 .name   = "lockmem",
1689                 .type   = FIO_OPT_STR_VAL,
1690                 .cb     = str_lockmem_cb,
1691                 .help   = "Lock down this amount of memory",
1692                 .def    = "0",
1693         },
1694         {
1695                 .name   = "rwmixread",
1696                 .type   = FIO_OPT_INT,
1697                 .cb     = str_rwmix_read_cb,
1698                 .maxval = 100,
1699                 .help   = "Percentage of mixed workload that is reads",
1700                 .def    = "50",
1701         },
1702         {
1703                 .name   = "rwmixwrite",
1704                 .type   = FIO_OPT_INT,
1705                 .cb     = str_rwmix_write_cb,
1706                 .maxval = 100,
1707                 .help   = "Percentage of mixed workload that is writes",
1708                 .def    = "50",
1709         },
1710         {
1711                 .name   = "rwmixcycle",
1712                 .type   = FIO_OPT_DEPRECATED,
1713         },
1714         {
1715                 .name   = "nice",
1716                 .type   = FIO_OPT_INT,
1717                 .off1   = td_var_offset(nice),
1718                 .help   = "Set job CPU nice value",
1719                 .minval = -19,
1720                 .maxval = 20,
1721                 .def    = "0",
1722         },
1723 #ifdef FIO_HAVE_IOPRIO
1724         {
1725                 .name   = "prio",
1726                 .type   = FIO_OPT_INT,
1727                 .cb     = str_prio_cb,
1728                 .help   = "Set job IO priority value",
1729                 .minval = 0,
1730                 .maxval = 7,
1731         },
1732         {
1733                 .name   = "prioclass",
1734                 .type   = FIO_OPT_INT,
1735                 .cb     = str_prioclass_cb,
1736                 .help   = "Set job IO priority class",
1737                 .minval = 0,
1738                 .maxval = 3,
1739         },
1740 #endif
1741         {
1742                 .name   = "thinktime",
1743                 .type   = FIO_OPT_INT,
1744                 .off1   = td_var_offset(thinktime),
1745                 .help   = "Idle time between IO buffers (usec)",
1746                 .def    = "0",
1747         },
1748         {
1749                 .name   = "thinktime_spin",
1750                 .type   = FIO_OPT_INT,
1751                 .off1   = td_var_offset(thinktime_spin),
1752                 .help   = "Start think time by spinning this amount (usec)",
1753                 .def    = "0",
1754                 .parent = "thinktime",
1755         },
1756         {
1757                 .name   = "thinktime_blocks",
1758                 .type   = FIO_OPT_INT,
1759                 .off1   = td_var_offset(thinktime_blocks),
1760                 .help   = "IO buffer period between 'thinktime'",
1761                 .def    = "1",
1762                 .parent = "thinktime",
1763         },
1764         {
1765                 .name   = "rate",
1766                 .type   = FIO_OPT_INT,
1767                 .off1   = td_var_offset(rate[0]),
1768                 .off2   = td_var_offset(rate[1]),
1769                 .help   = "Set bandwidth rate",
1770         },
1771         {
1772                 .name   = "ratemin",
1773                 .type   = FIO_OPT_INT,
1774                 .off1   = td_var_offset(ratemin[0]),
1775                 .off2   = td_var_offset(ratemin[1]),
1776                 .help   = "Job must meet this rate or it will be shutdown",
1777                 .parent = "rate",
1778         },
1779         {
1780                 .name   = "rate_iops",
1781                 .type   = FIO_OPT_INT,
1782                 .off1   = td_var_offset(rate_iops[0]),
1783                 .off2   = td_var_offset(rate_iops[1]),
1784                 .help   = "Limit IO used to this number of IO operations/sec",
1785         },
1786         {
1787                 .name   = "rate_iops_min",
1788                 .type   = FIO_OPT_INT,
1789                 .off1   = td_var_offset(rate_iops_min[0]),
1790                 .off2   = td_var_offset(rate_iops_min[1]),
1791                 .help   = "Job must meet this rate or it will be shut down",
1792                 .parent = "rate_iops",
1793         },
1794         {
1795                 .name   = "ratecycle",
1796                 .type   = FIO_OPT_INT,
1797                 .off1   = td_var_offset(ratecycle),
1798                 .help   = "Window average for rate limits (msec)",
1799                 .def    = "1000",
1800                 .parent = "rate",
1801         },
1802         {
1803                 .name   = "invalidate",
1804                 .type   = FIO_OPT_BOOL,
1805                 .off1   = td_var_offset(invalidate_cache),
1806                 .help   = "Invalidate buffer/page cache prior to running job",
1807                 .def    = "1",
1808         },
1809         {
1810                 .name   = "sync",
1811                 .type   = FIO_OPT_BOOL,
1812                 .off1   = td_var_offset(sync_io),
1813                 .help   = "Use O_SYNC for buffered writes",
1814                 .def    = "0",
1815                 .parent = "buffered",
1816         },
1817         {
1818                 .name   = "bwavgtime",
1819                 .type   = FIO_OPT_INT,
1820                 .off1   = td_var_offset(bw_avg_time),
1821                 .help   = "Time window over which to calculate bandwidth"
1822                           " (msec)",
1823                 .def    = "500",
1824         },
1825         {
1826                 .name   = "create_serialize",
1827                 .type   = FIO_OPT_BOOL,
1828                 .off1   = td_var_offset(create_serialize),
1829                 .help   = "Serialize creating of job files",
1830                 .def    = "1",
1831         },
1832         {
1833                 .name   = "create_fsync",
1834                 .type   = FIO_OPT_BOOL,
1835                 .off1   = td_var_offset(create_fsync),
1836                 .help   = "fsync file after creation",
1837                 .def    = "1",
1838         },
1839         {
1840                 .name   = "create_on_open",
1841                 .type   = FIO_OPT_BOOL,
1842                 .off1   = td_var_offset(create_on_open),
1843                 .help   = "Create files when they are opened for IO",
1844                 .def    = "0",
1845         },
1846         {
1847                 .name   = "pre_read",
1848                 .type   = FIO_OPT_BOOL,
1849                 .off1   = td_var_offset(pre_read),
1850                 .help   = "Pre-read files before starting official testing",
1851                 .def    = "0",
1852         },
1853         {
1854                 .name   = "cpuload",
1855                 .type   = FIO_OPT_INT,
1856                 .off1   = td_var_offset(cpuload),
1857                 .help   = "Use this percentage of CPU",
1858         },
1859         {
1860                 .name   = "cpuchunks",
1861                 .type   = FIO_OPT_INT,
1862                 .off1   = td_var_offset(cpucycle),
1863                 .help   = "Length of the CPU burn cycles (usecs)",
1864                 .def    = "50000",
1865                 .parent = "cpuload",
1866         },
1867 #ifdef FIO_HAVE_CPU_AFFINITY
1868         {
1869                 .name   = "cpumask",
1870                 .type   = FIO_OPT_INT,
1871                 .cb     = str_cpumask_cb,
1872                 .help   = "CPU affinity mask",
1873         },
1874         {
1875                 .name   = "cpus_allowed",
1876                 .type   = FIO_OPT_STR,
1877                 .cb     = str_cpus_allowed_cb,
1878                 .help   = "Set CPUs allowed",
1879         },
1880 #endif
1881         {
1882                 .name   = "end_fsync",
1883                 .type   = FIO_OPT_BOOL,
1884                 .off1   = td_var_offset(end_fsync),
1885                 .help   = "Include fsync at the end of job",
1886                 .def    = "0",
1887         },
1888         {
1889                 .name   = "fsync_on_close",
1890                 .type   = FIO_OPT_BOOL,
1891                 .off1   = td_var_offset(fsync_on_close),
1892                 .help   = "fsync files on close",
1893                 .def    = "0",
1894         },
1895         {
1896                 .name   = "unlink",
1897                 .type   = FIO_OPT_BOOL,
1898                 .off1   = td_var_offset(unlink),
1899                 .help   = "Unlink created files after job has completed",
1900                 .def    = "0",
1901         },
1902         {
1903                 .name   = "exitall",
1904                 .type   = FIO_OPT_STR_SET,
1905                 .cb     = str_exitall_cb,
1906                 .help   = "Terminate all jobs when one exits",
1907         },
1908         {
1909                 .name   = "stonewall",
1910                 .alias  = "wait_for_previous",
1911                 .type   = FIO_OPT_STR_SET,
1912                 .off1   = td_var_offset(stonewall),
1913                 .help   = "Insert a hard barrier between this job and previous",
1914         },
1915         {
1916                 .name   = "new_group",
1917                 .type   = FIO_OPT_STR_SET,
1918                 .off1   = td_var_offset(new_group),
1919                 .help   = "Mark the start of a new group (for reporting)",
1920         },
1921         {
1922                 .name   = "thread",
1923                 .type   = FIO_OPT_STR_SET,
1924                 .off1   = td_var_offset(use_thread),
1925                 .help   = "Use threads instead of forks",
1926         },
1927         {
1928                 .name   = "write_bw_log",
1929                 .type   = FIO_OPT_STR,
1930                 .off1   = td_var_offset(write_bw_log),
1931                 .cb     = str_write_bw_log_cb,
1932                 .help   = "Write log of bandwidth during run",
1933         },
1934         {
1935                 .name   = "write_lat_log",
1936                 .type   = FIO_OPT_STR,
1937                 .off1   = td_var_offset(write_lat_log),
1938                 .cb     = str_write_lat_log_cb,
1939                 .help   = "Write log of latency during run",
1940         },
1941         {
1942                 .name   = "hugepage-size",
1943                 .type   = FIO_OPT_INT,
1944                 .off1   = td_var_offset(hugepage_size),
1945                 .help   = "When using hugepages, specify size of each page",
1946                 .def    = __fio_stringify(FIO_HUGE_PAGE),
1947         },
1948         {
1949                 .name   = "group_reporting",
1950                 .type   = FIO_OPT_STR_SET,
1951                 .off1   = td_var_offset(group_reporting),
1952                 .help   = "Do reporting on a per-group basis",
1953         },
1954         {
1955                 .name   = "zero_buffers",
1956                 .type   = FIO_OPT_STR_SET,
1957                 .off1   = td_var_offset(zero_buffers),
1958                 .help   = "Init IO buffers to all zeroes",
1959         },
1960         {
1961                 .name   = "refill_buffers",
1962                 .type   = FIO_OPT_STR_SET,
1963                 .off1   = td_var_offset(refill_buffers),
1964                 .help   = "Refill IO buffers on every IO submit",
1965         },
1966         {
1967                 .name   = "scramble_buffers",
1968                 .type   = FIO_OPT_BOOL,
1969                 .off1   = td_var_offset(scramble_buffers),
1970                 .help   = "Slightly scramble buffers on every IO submit",
1971                 .def    = "1",
1972         },
1973         {
1974                 .name   = "clat_percentiles",
1975                 .type   = FIO_OPT_BOOL,
1976                 .off1   = td_var_offset(clat_percentiles),
1977                 .help   = "Enable the reporting of completion latency percentiles",
1978                 .def    = "0",
1979         },
1980         {
1981                 .name   = "percentile_list",
1982                 .type   = FIO_OPT_FLOAT_LIST,
1983                 .off1   = td_var_offset(percentile_list),
1984                 .off2   = td_var_offset(overwrite_plist),
1985                 .help   = "Specify a custom list of percentiles to report",
1986                 .maxlen = FIO_IO_U_LIST_MAX_LEN,
1987                 .minfp  = 0.0,
1988                 .maxfp  = 100.0,
1989         },
1990
1991 #ifdef FIO_HAVE_DISK_UTIL
1992         {
1993                 .name   = "disk_util",
1994                 .type   = FIO_OPT_BOOL,
1995                 .off1   = td_var_offset(do_disk_util),
1996                 .help   = "Log disk utilization statistics",
1997                 .def    = "1",
1998         },
1999 #endif
2000         {
2001                 .name   = "gtod_reduce",
2002                 .type   = FIO_OPT_BOOL,
2003                 .help   = "Greatly reduce number of gettimeofday() calls",
2004                 .cb     = str_gtod_reduce_cb,
2005                 .def    = "0",
2006         },
2007         {
2008                 .name   = "disable_lat",
2009                 .type   = FIO_OPT_BOOL,
2010                 .off1   = td_var_offset(disable_lat),
2011                 .help   = "Disable latency numbers",
2012                 .parent = "gtod_reduce",
2013                 .def    = "0",
2014         },
2015         {
2016                 .name   = "disable_clat",
2017                 .type   = FIO_OPT_BOOL,
2018                 .off1   = td_var_offset(disable_clat),
2019                 .help   = "Disable completion latency numbers",
2020                 .parent = "gtod_reduce",
2021                 .def    = "0",
2022         },
2023         {
2024                 .name   = "disable_slat",
2025                 .type   = FIO_OPT_BOOL,
2026                 .off1   = td_var_offset(disable_slat),
2027                 .help   = "Disable submission latency numbers",
2028                 .parent = "gtod_reduce",
2029                 .def    = "0",
2030         },
2031         {
2032                 .name   = "disable_bw_measurement",
2033                 .type   = FIO_OPT_BOOL,
2034                 .off1   = td_var_offset(disable_bw),
2035                 .help   = "Disable bandwidth logging",
2036                 .parent = "gtod_reduce",
2037                 .def    = "0",
2038         },
2039         {
2040                 .name   = "gtod_cpu",
2041                 .type   = FIO_OPT_INT,
2042                 .cb     = str_gtod_cpu_cb,
2043                 .help   = "Set up dedicated gettimeofday() thread on this CPU",
2044                 .verify = gtod_cpu_verify,
2045         },
2046         {
2047                 .name   = "continue_on_error",
2048                 .type   = FIO_OPT_BOOL,
2049                 .off1   = td_var_offset(continue_on_error),
2050                 .help   = "Continue on non-fatal errors during IO",
2051                 .def    = "0",
2052         },
2053         {
2054                 .name   = "profile",
2055                 .type   = FIO_OPT_STR_STORE,
2056                 .off1   = td_var_offset(profile),
2057                 .help   = "Select a specific builtin performance test",
2058         },
2059         {
2060                 .name   = "cgroup",
2061                 .type   = FIO_OPT_STR_STORE,
2062                 .off1   = td_var_offset(cgroup),
2063                 .help   = "Add job to cgroup of this name",
2064         },
2065         {
2066                 .name   = "cgroup_weight",
2067                 .type   = FIO_OPT_INT,
2068                 .off1   = td_var_offset(cgroup_weight),
2069                 .help   = "Use given weight for cgroup",
2070                 .minval = 100,
2071                 .maxval = 1000,
2072         },
2073         {
2074                 .name   = "cgroup_nodelete",
2075                 .type   = FIO_OPT_BOOL,
2076                 .off1   = td_var_offset(cgroup_nodelete),
2077                 .help   = "Do not delete cgroups after job completion",
2078                 .def    = "0",
2079         },
2080         {
2081                 .name   = "uid",
2082                 .type   = FIO_OPT_INT,
2083                 .off1   = td_var_offset(uid),
2084                 .help   = "Run job with this user ID",
2085         },
2086         {
2087                 .name   = "gid",
2088                 .type   = FIO_OPT_INT,
2089                 .off1   = td_var_offset(gid),
2090                 .help   = "Run job with this group ID",
2091         },
2092         {
2093                 .name = NULL,
2094         },
2095 };
2096
2097 static void add_to_lopt(struct option *lopt, struct fio_option *o,
2098                         const char *name)
2099 {
2100         lopt->name = (char *) name;
2101         lopt->val = FIO_GETOPT_JOB;
2102         if (o->type == FIO_OPT_STR_SET)
2103                 lopt->has_arg = no_argument;
2104         else
2105                 lopt->has_arg = required_argument;
2106 }
2107
2108 void fio_options_dup_and_init(struct option *long_options)
2109 {
2110         struct fio_option *o;
2111         unsigned int i;
2112
2113         options_init(options);
2114
2115         i = 0;
2116         while (long_options[i].name)
2117                 i++;
2118
2119         o = &options[0];
2120         while (o->name) {
2121                 add_to_lopt(&long_options[i], o, o->name);
2122                 if (o->alias) {
2123                         i++;
2124                         add_to_lopt(&long_options[i], o, o->alias);
2125                 }
2126
2127                 i++;
2128                 o++;
2129                 assert(i < FIO_NR_OPTIONS);
2130         }
2131 }
2132
2133 struct fio_keyword {
2134         const char *word;
2135         const char *desc;
2136         char *replace;
2137 };
2138
2139 static struct fio_keyword fio_keywords[] = {
2140         {
2141                 .word   = "$pagesize",
2142                 .desc   = "Page size in the system",
2143         },
2144         {
2145                 .word   = "$mb_memory",
2146                 .desc   = "Megabytes of memory online",
2147         },
2148         {
2149                 .word   = "$ncpus",
2150                 .desc   = "Number of CPUs online in the system",
2151         },
2152         {
2153                 .word   = NULL,
2154         },
2155 };
2156
2157 void fio_keywords_init(void)
2158 {
2159         unsigned long long mb_memory;
2160         char buf[128];
2161         long l;
2162
2163         sprintf(buf, "%lu", page_size);
2164         fio_keywords[0].replace = strdup(buf);
2165
2166         mb_memory = os_phys_mem() / (1024 * 1024);
2167         sprintf(buf, "%llu", mb_memory);
2168         fio_keywords[1].replace = strdup(buf);
2169
2170         l = cpus_online();
2171         sprintf(buf, "%lu", l);
2172         fio_keywords[2].replace = strdup(buf);
2173 }
2174
2175 #define BC_APP          "bc"
2176
2177 static char *bc_calc(char *str)
2178 {
2179         char *buf, *tmp, opt[80];
2180         FILE *f;
2181         int ret;
2182
2183         /*
2184          * No math, just return string
2185          */
2186         if (!strchr(str, '+') && !strchr(str, '-') && !strchr(str, '*') &&
2187             !strchr(str, '/'))
2188                 return str;
2189
2190         /*
2191          * Split option from value, we only need to calculate the value
2192          */
2193         tmp = strchr(str, '=');
2194         if (!tmp)
2195                 return str;
2196
2197         tmp++;
2198         memset(opt, 0, sizeof(opt));
2199         strncpy(opt, str, tmp - str);
2200
2201         buf = malloc(128);
2202
2203         sprintf(buf, "which %s > /dev/null", BC_APP);
2204         if (system(buf)) {
2205                 log_err("fio: bc is needed for performing math\n");
2206                 free(buf);
2207                 return NULL;
2208         }
2209
2210         sprintf(buf, "echo %s | %s", tmp, BC_APP);
2211         f = popen(buf, "r");
2212         if (!f) {
2213                 free(buf);
2214                 return NULL;
2215         }
2216
2217         ret = fread(buf, 1, 128, f);
2218         if (ret <= 0) {
2219                 free(buf);
2220                 return NULL;
2221         }
2222
2223         buf[ret - 1] = '\0';
2224         strcat(opt, buf);
2225         strcpy(buf, opt);
2226         pclose(f);
2227         free(str);
2228         return buf;
2229 }
2230
2231 /*
2232  * Look for reserved variable names and replace them with real values
2233  */
2234 static char *fio_keyword_replace(char *opt)
2235 {
2236         char *s;
2237         int i;
2238
2239         for (i = 0; fio_keywords[i].word != NULL; i++) {
2240                 struct fio_keyword *kw = &fio_keywords[i];
2241
2242                 while ((s = strstr(opt, kw->word)) != NULL) {
2243                         char *new = malloc(strlen(opt) + 1);
2244                         char *o_org = opt;
2245                         int olen = s - opt;
2246                         int len;
2247
2248                         /*
2249                          * Copy part of the string before the keyword and
2250                          * sprintf() the replacement after it.
2251                          */
2252                         memcpy(new, opt, olen);
2253                         len = sprintf(new + olen, "%s", kw->replace);
2254
2255                         /*
2256                          * If there's more in the original string, copy that
2257                          * in too
2258                          */
2259                         opt += strlen(kw->word) + olen;
2260                         if (strlen(opt))
2261                                 memcpy(new + olen + len, opt, opt - o_org - 1);
2262
2263                         /*
2264                          * replace opt and free the old opt
2265                          */
2266                         opt = new;
2267                         //free(o_org);
2268
2269                         /*
2270                          * Check for potential math and invoke bc, if possible
2271                          */
2272                         opt = bc_calc(opt);
2273                 }
2274         }
2275
2276         return opt;
2277 }
2278
2279 int fio_options_parse(struct thread_data *td, char **opts, int num_opts)
2280 {
2281         int i, ret;
2282
2283         sort_options(opts, options, num_opts);
2284
2285         for (ret = 0, i = 0; i < num_opts; i++) {
2286                 opts[i] = fio_keyword_replace(opts[i]);
2287                 ret |= parse_option(opts[i], options, td);
2288         }
2289
2290         return ret;
2291 }
2292
2293 int fio_cmd_option_parse(struct thread_data *td, const char *opt, char *val)
2294 {
2295         return parse_cmd_option(opt, val, options, td);
2296 }
2297
2298 void fio_fill_default_options(struct thread_data *td)
2299 {
2300         fill_default_options(td, options);
2301 }
2302
2303 int fio_show_option_help(const char *opt)
2304 {
2305         return show_cmd_help(options, opt);
2306 }
2307
2308 static void __options_mem(struct thread_data *td, int alloc)
2309 {
2310         struct thread_options *o = &td->o;
2311         struct fio_option *opt;
2312         char **ptr;
2313         int i;
2314
2315         for (i = 0, opt = &options[0]; opt->name; i++, opt = &options[i]) {
2316                 if (opt->type != FIO_OPT_STR_STORE)
2317                         continue;
2318
2319                 ptr = (void *) o + opt->off1;
2320                 if (*ptr) {
2321                         if (alloc)
2322                                 *ptr = strdup(*ptr);
2323                         else {
2324                                 free(*ptr);
2325                                 *ptr = NULL;
2326                         }
2327                 }
2328         }
2329 }
2330
2331 /*
2332  * dupe FIO_OPT_STR_STORE options
2333  */
2334 void options_mem_dupe(struct thread_data *td)
2335 {
2336         __options_mem(td, 1);
2337 }
2338
2339 void options_mem_free(struct thread_data fio_unused *td)
2340 {
2341 #if 0
2342         __options_mem(td, 0);
2343 #endif
2344 }
2345
2346 unsigned int fio_get_kb_base(void *data)
2347 {
2348         struct thread_data *td = data;
2349         unsigned int kb_base = 0;
2350
2351         if (td)
2352                 kb_base = td->o.kb_base;
2353         if (!kb_base)
2354                 kb_base = 1024;
2355
2356         return kb_base;
2357 }
2358
2359 int add_option(struct fio_option *o)
2360 {
2361         struct fio_option *__o;
2362         int opt_index = 0;
2363
2364         __o = options;
2365         while (__o->name) {
2366                 opt_index++;
2367                 __o++;
2368         }
2369
2370         memcpy(&options[opt_index], o, sizeof(*o));
2371         return 0;
2372 }
2373
2374 void invalidate_profile_options(const char *prof_name)
2375 {
2376         struct fio_option *o;
2377
2378         o = options;
2379         while (o->name) {
2380                 if (o->prof_name && !strcmp(o->prof_name, prof_name)) {
2381                         o->type = FIO_OPT_INVALID;
2382                         o->prof_name = NULL;
2383                 }
2384                 o++;
2385         }
2386 }
2387
2388 void add_opt_posval(const char *optname, const char *ival, const char *help)
2389 {
2390         struct fio_option *o;
2391         unsigned int i;
2392
2393         o = find_option(options, optname);
2394         if (!o)
2395                 return;
2396
2397         for (i = 0; i < PARSE_MAX_VP; i++) {
2398                 if (o->posval[i].ival)
2399                         continue;
2400
2401                 o->posval[i].ival = ival;
2402                 o->posval[i].help = help;
2403                 break;
2404         }
2405 }
2406
2407 void del_opt_posval(const char *optname, const char *ival)
2408 {
2409         struct fio_option *o;
2410         unsigned int i;
2411
2412         o = find_option(options, optname);
2413         if (!o)
2414                 return;
2415
2416         for (i = 0; i < PARSE_MAX_VP; i++) {
2417                 if (!o->posval[i].ival)
2418                         continue;
2419                 if (strcmp(o->posval[i].ival, ival))
2420                         continue;
2421
2422                 o->posval[i].ival = NULL;
2423                 o->posval[i].help = NULL;
2424         }
2425 }