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 #define __stringify_1(x)        #x
 833 #define __stringify(x)          __stringify_1(x)
 834
 835 /*
 836  * Map of job/command line options
 837  */
 838 static struct fio_option options[FIO_MAX_OPTS] = {
 839         {
 840                 .name   = "description",
 841                 .type   = FIO_OPT_STR_STORE,
 842                 .off1   = td_var_offset(description),
 843                 .help   = "Text job description",
 844         },
 845         {
 846                 .name   = "name",
 847                 .type   = FIO_OPT_STR_STORE,
 848                 .off1   = td_var_offset(name),
 849                 .help   = "Name of this job",
 850         },
 851         {
 852                 .name   = "directory",
 853                 .type   = FIO_OPT_STR_STORE,
 854                 .off1   = td_var_offset(directory),
 855                 .cb     = str_directory_cb,
 856                 .help   = "Directory to store files in",
 857         },
 858         {
 859                 .name   = "filename",
 860                 .type   = FIO_OPT_STR_STORE,
 861                 .off1   = td_var_offset(filename),
 862                 .cb     = str_filename_cb,
 863                 .prio   = -1, /* must come after "directory" */
 864                 .help   = "File(s) to use for the workload",
 865         },
 866         {
 867                 .name   = "kb_base",
 868                 .type   = FIO_OPT_INT,
 869                 .off1   = td_var_offset(kb_base),
 870                 .verify = kb_base_verify,
 871                 .prio   = 1,
 872                 .def    = "1024",
 873                 .help   = "How many bytes per KB for reporting (1000 or 1024)",
 874         },
 875         {
 876                 .name   = "lockfile",
 877                 .type   = FIO_OPT_STR,
 878                 .cb     = str_lockfile_cb,
 879                 .off1   = td_var_offset(file_lock_mode),
 880                 .help   = "Lock file when doing IO to it",
 881                 .parent = "filename",
 882                 .def    = "none",
 883                 .posval = {
 884                           { .ival = "none",
 885                             .oval = FILE_LOCK_NONE,
 886                             .help = "No file locking",
 887                           },
 888                           { .ival = "exclusive",
 889                             .oval = FILE_LOCK_EXCLUSIVE,
 890                             .help = "Exclusive file lock",
 891                           },
 892                           {
 893                             .ival = "readwrite",
 894                             .oval = FILE_LOCK_READWRITE,
 895                             .help = "Read vs write lock",
 896                           },
 897                 },
 898         },
 899         {
 900                 .name   = "opendir",
 901                 .type   = FIO_OPT_STR_STORE,
 902                 .off1   = td_var_offset(opendir),
 903                 .cb     = str_opendir_cb,
 904                 .help   = "Recursively add files from this directory and down",
 905         },
 906         {
 907                 .name   = "rw",
 908                 .alias  = "readwrite",
 909                 .type   = FIO_OPT_STR,
 910                 .cb     = str_rw_cb,
 911                 .off1   = td_var_offset(td_ddir),
 912                 .help   = "IO direction",
 913                 .def    = "read",
 914                 .verify = rw_verify,
 915                 .posval = {
 916                           { .ival = "read",
 917                             .oval = TD_DDIR_READ,
 918                             .help = "Sequential read",
 919                           },
 920                           { .ival = "write",
 921                             .oval = TD_DDIR_WRITE,
 922                             .help = "Sequential write",
 923                           },
 924                           { .ival = "randread",
 925                             .oval = TD_DDIR_RANDREAD,
 926                             .help = "Random read",
 927                           },
 928                           { .ival = "randwrite",
 929                             .oval = TD_DDIR_RANDWRITE,
 930                             .help = "Random write",
 931                           },
 932                           { .ival = "rw",
 933                             .oval = TD_DDIR_RW,
 934                             .help = "Sequential read and write mix",
 935                           },
 936                           { .ival = "randrw",
 937                             .oval = TD_DDIR_RANDRW,
 938                             .help = "Random read and write mix"
 939                           },
 940                 },
 941         },
 942         {
 943                 .name   = "rw_sequencer",
 944                 .type   = FIO_OPT_STR,
 945                 .off1   = td_var_offset(rw_seq),
 946                 .help   = "IO offset generator modifier",
 947                 .def    = "sequential",
 948                 .posval = {
 949                           { .ival = "sequential",
 950                             .oval = RW_SEQ_SEQ,
 951                             .help = "Generate sequential offsets",
 952                           },
 953                           { .ival = "identical",
 954                             .oval = RW_SEQ_IDENT,
 955                             .help = "Generate identical offsets",
 956                           },
 957                 },
 958         },
 959
 960         {
 961                 .name   = "ioengine",
 962                 .type   = FIO_OPT_STR_STORE,
 963                 .off1   = td_var_offset(ioengine),
 964                 .help   = "IO engine to use",
 965                 .def    = FIO_PREFERRED_ENGINE,
 966                 .posval = {
 967                           { .ival = "sync",
 968                             .help = "Use read/write",
 969                           },
 970                           { .ival = "psync",
 971                             .help = "Use pread/pwrite",
 972                           },
 973                           { .ival = "vsync",
 974                             .help = "Use readv/writev",
 975                           },
 976 #ifdef FIO_HAVE_LIBAIO
 977                           { .ival = "libaio",
 978                             .help = "Linux native asynchronous IO",
 979                             .cb   = str_libaio_cb,
 980                           },
 981 #endif
 982 #ifdef FIO_HAVE_POSIXAIO
 983                           { .ival = "posixaio",
 984                             .help = "POSIX asynchronous IO",
 985                           },
 986 #endif
 987 #ifdef FIO_HAVE_SOLARISAIO
 988                           { .ival = "solarisaio",
 989                             .help = "Solaris native asynchronous IO",
 990                           },
 991 #endif
 992 #ifdef FIO_HAVE_WINDOWSAIO
 993                           { .ival = "windowsaio",
 994                             .help = "Windows native asynchronous IO"
 995                           },
 996 #endif
 997                           { .ival = "mmap",
 998                             .help = "Memory mapped IO"
 999                           },
1000 #ifdef FIO_HAVE_SPLICE
1001                           { .ival = "splice",
1002                             .help = "splice/vmsplice based IO",
1003                           },
1004                           { .ival = "netsplice",
1005                             .help = "splice/vmsplice to/from the network",
1006                           },
1007 #endif
1008 #ifdef FIO_HAVE_SGIO
1009                           { .ival = "sg",
1010                             .help = "SCSI generic v3 IO",
1011                           },
1012 #endif
1013                           { .ival = "null",
1014                             .help = "Testing engine (no data transfer)",
1015                           },
1016                           { .ival = "net",
1017                             .help = "Network IO",
1018                           },
1019 #ifdef FIO_HAVE_SYSLET
1020                           { .ival = "syslet-rw",
1021                             .help = "syslet enabled async pread/pwrite IO",
1022                           },
1023 #endif
1024                           { .ival = "cpuio",
1025                             .help = "CPU cycle burner engine",
1026                           },
1027 #ifdef FIO_HAVE_GUASI
1028                           { .ival = "guasi",
1029                             .help = "GUASI IO engine",
1030                           },
1031 #endif
1032 #ifdef FIO_HAVE_BINJECT
1033                           { .ival = "binject",
1034                             .help = "binject direct inject block engine",
1035                           },
1036 #endif
1037 #ifdef FIO_HAVE_RDMA
1038                           { .ival = "rdma",
1039                             .help = "RDMA IO engine",
1040                           },
1041 #endif
1042                           { .ival = "external",
1043                             .help = "Load external engine (append name)",
1044                           },
1045                 },
1046         },
1047         {
1048                 .name   = "iodepth",
1049                 .type   = FIO_OPT_INT,
1050                 .off1   = td_var_offset(iodepth),
1051                 .help   = "Number of IO buffers to keep in flight",
1052                 .minval = 1,
1053                 .def    = "1",
1054         },
1055         {
1056                 .name   = "iodepth_batch",
1057                 .alias  = "iodepth_batch_submit",
1058                 .type   = FIO_OPT_INT,
1059                 .off1   = td_var_offset(iodepth_batch),
1060                 .help   = "Number of IO buffers to submit in one go",
1061                 .parent = "iodepth",
1062                 .minval = 1,
1063                 .def    = "1",
1064         },
1065         {
1066                 .name   = "iodepth_batch_complete",
1067                 .type   = FIO_OPT_INT,
1068                 .off1   = td_var_offset(iodepth_batch_complete),
1069                 .help   = "Number of IO buffers to retrieve in one go",
1070                 .parent = "iodepth",
1071                 .minval = 0,
1072                 .def    = "1",
1073         },
1074         {
1075                 .name   = "iodepth_low",
1076                 .type   = FIO_OPT_INT,
1077                 .off1   = td_var_offset(iodepth_low),
1078                 .help   = "Low water mark for queuing depth",
1079                 .parent = "iodepth",
1080         },
1081         {
1082                 .name   = "size",
1083                 .type   = FIO_OPT_STR_VAL,
1084                 .cb     = str_size_cb,
1085                 .help   = "Total size of device or files",
1086         },
1087         {
1088                 .name   = "fill_device",
1089                 .alias  = "fill_fs",
1090                 .type   = FIO_OPT_BOOL,
1091                 .off1   = td_var_offset(fill_device),
1092                 .help   = "Write until an ENOSPC error occurs",
1093                 .def    = "0",
1094         },
1095         {
1096                 .name   = "filesize",
1097                 .type   = FIO_OPT_STR_VAL,
1098                 .off1   = td_var_offset(file_size_low),
1099                 .off2   = td_var_offset(file_size_high),
1100                 .minval = 1,
1101                 .help   = "Size of individual files",
1102         },
1103         {
1104                 .name   = "offset",
1105                 .alias  = "fileoffset",
1106                 .type   = FIO_OPT_STR_VAL,
1107                 .off1   = td_var_offset(start_offset),
1108                 .help   = "Start IO from this offset",
1109                 .def    = "0",
1110         },
1111         {
1112                 .name   = "bs",
1113                 .alias  = "blocksize",
1114                 .type   = FIO_OPT_INT,
1115                 .off1   = td_var_offset(bs[DDIR_READ]),
1116                 .off2   = td_var_offset(bs[DDIR_WRITE]),
1117                 .minval = 1,
1118                 .help   = "Block size unit",
1119                 .def    = "4k",
1120                 .parent = "rw",
1121         },
1122         {
1123                 .name   = "ba",
1124                 .alias  = "blockalign",
1125                 .type   = FIO_OPT_INT,
1126                 .off1   = td_var_offset(ba[DDIR_READ]),
1127                 .off2   = td_var_offset(ba[DDIR_WRITE]),
1128                 .minval = 1,
1129                 .help   = "IO block offset alignment",
1130                 .parent = "rw",
1131         },
1132         {
1133                 .name   = "bsrange",
1134                 .alias  = "blocksize_range",
1135                 .type   = FIO_OPT_RANGE,
1136                 .off1   = td_var_offset(min_bs[DDIR_READ]),
1137                 .off2   = td_var_offset(max_bs[DDIR_READ]),
1138                 .off3   = td_var_offset(min_bs[DDIR_WRITE]),
1139                 .off4   = td_var_offset(max_bs[DDIR_WRITE]),
1140                 .minval = 1,
1141                 .help   = "Set block size range (in more detail than bs)",
1142                 .parent = "rw",
1143         },
1144         {
1145                 .name   = "bssplit",
1146                 .type   = FIO_OPT_STR,
1147                 .cb     = str_bssplit_cb,
1148                 .help   = "Set a specific mix of block sizes",
1149                 .parent = "rw",
1150         },
1151         {
1152                 .name   = "bs_unaligned",
1153                 .alias  = "blocksize_unaligned",
1154                 .type   = FIO_OPT_STR_SET,
1155                 .off1   = td_var_offset(bs_unaligned),
1156                 .help   = "Don't sector align IO buffer sizes",
1157                 .parent = "rw",
1158         },
1159         {
1160                 .name   = "randrepeat",
1161                 .type   = FIO_OPT_BOOL,
1162                 .off1   = td_var_offset(rand_repeatable),
1163                 .help   = "Use repeatable random IO pattern",
1164                 .def    = "1",
1165                 .parent = "rw",
1166         },
1167         {
1168                 .name   = "use_os_rand",
1169                 .type   = FIO_OPT_BOOL,
1170                 .off1   = td_var_offset(use_os_rand),
1171                 .help   = "Set to use OS random generator",
1172                 .def    = "0",
1173                 .parent = "rw",
1174         },
1175         {
1176                 .name   = "norandommap",
1177                 .type   = FIO_OPT_STR_SET,
1178                 .off1   = td_var_offset(norandommap),
1179                 .help   = "Accept potential duplicate random blocks",
1180                 .parent = "rw",
1181         },
1182         {
1183                 .name   = "softrandommap",
1184                 .type   = FIO_OPT_BOOL,
1185                 .off1   = td_var_offset(softrandommap),
1186                 .help   = "Set norandommap if randommap allocation fails",
1187                 .parent = "norandommap",
1188                 .def    = "0",
1189         },
1190         {
1191                 .name   = "nrfiles",
1192                 .alias  = "nr_files",
1193                 .type   = FIO_OPT_INT,
1194                 .off1   = td_var_offset(nr_files),
1195                 .help   = "Split job workload between this number of files",
1196                 .def    = "1",
1197         },
1198         {
1199                 .name   = "openfiles",
1200                 .type   = FIO_OPT_INT,
1201                 .off1   = td_var_offset(open_files),
1202                 .help   = "Number of files to keep open at the same time",
1203         },
1204         {
1205                 .name   = "file_service_type",
1206                 .type   = FIO_OPT_STR,
1207                 .cb     = str_fst_cb,
1208                 .off1   = td_var_offset(file_service_type),
1209                 .help   = "How to select which file to service next",
1210                 .def    = "roundrobin",
1211                 .posval = {
1212                           { .ival = "random",
1213                             .oval = FIO_FSERVICE_RANDOM,
1214                             .help = "Choose a file at random",
1215                           },
1216                           { .ival = "roundrobin",
1217                             .oval = FIO_FSERVICE_RR,
1218                             .help = "Round robin select files",
1219                           },
1220                           { .ival = "sequential",
1221                             .oval = FIO_FSERVICE_SEQ,
1222                             .help = "Finish one file before moving to the next",
1223                           },
1224                 },
1225                 .parent = "nrfiles",
1226         },
1227 #ifdef FIO_HAVE_FALLOCATE
1228         {
1229                 .name   = "fallocate",
1230                 .type   = FIO_OPT_STR,
1231                 .off1   = td_var_offset(fallocate_mode),
1232                 .help   = "Whether pre-allocation is performed when laying out files",
1233                 .def    = "posix",
1234                 .posval = {
1235                           { .ival = "none",
1236                             .oval = FIO_FALLOCATE_NONE,
1237                             .help = "Do not pre-allocate space",
1238                           },
1239                           { .ival = "posix",
1240                             .oval = FIO_FALLOCATE_POSIX,
1241                             .help = "Use posix_fallocate()",
1242                           },
1243 #ifdef FIO_HAVE_LINUX_FALLOCATE
1244                           { .ival = "keep",
1245                             .oval = FIO_FALLOCATE_KEEP_SIZE,
1246                             .help = "Use fallocate(..., FALLOC_FL_KEEP_SIZE, ...)",
1247                           },
1248 #endif
1249                           /* Compatibility with former boolean values */
1250                           { .ival = "0",
1251                             .oval = FIO_FALLOCATE_NONE,
1252                             .help = "Alias for 'none'",
1253                           },
1254                           { .ival = "1",
1255                             .oval = FIO_FALLOCATE_POSIX,
1256                             .help = "Alias for 'posix'",
1257                           },
1258                 },
1259         },
1260 #endif  /* FIO_HAVE_FALLOCATE */
1261         {
1262                 .name   = "fadvise_hint",
1263                 .type   = FIO_OPT_BOOL,
1264                 .off1   = td_var_offset(fadvise_hint),
1265                 .help   = "Use fadvise() to advise the kernel on IO pattern",
1266                 .def    = "1",
1267         },
1268         {
1269                 .name   = "fsync",
1270                 .type   = FIO_OPT_INT,
1271                 .off1   = td_var_offset(fsync_blocks),
1272                 .help   = "Issue fsync for writes every given number of blocks",
1273                 .def    = "0",
1274         },
1275         {
1276                 .name   = "fdatasync",
1277                 .type   = FIO_OPT_INT,
1278                 .off1   = td_var_offset(fdatasync_blocks),
1279                 .help   = "Issue fdatasync for writes every given number of blocks",
1280                 .def    = "0",
1281         },
1282         {
1283                 .name   = "write_barrier",
1284                 .type   = FIO_OPT_INT,
1285                 .off1   = td_var_offset(barrier_blocks),
1286                 .help   = "Make every Nth write a barrier write",
1287                 .def    = "0",
1288         },
1289 #ifdef FIO_HAVE_SYNC_FILE_RANGE
1290         {
1291                 .name   = "sync_file_range",
1292                 .posval = {
1293                           { .ival = "wait_before",
1294                             .oval = SYNC_FILE_RANGE_WAIT_BEFORE,
1295                             .help = "SYNC_FILE_RANGE_WAIT_BEFORE",
1296                             .or   = 1,
1297                           },
1298                           { .ival = "write",
1299                             .oval = SYNC_FILE_RANGE_WRITE,
1300                             .help = "SYNC_FILE_RANGE_WRITE",
1301                             .or   = 1,
1302                           },
1303                           {
1304                             .ival = "wait_after",
1305                             .oval = SYNC_FILE_RANGE_WAIT_AFTER,
1306                             .help = "SYNC_FILE_RANGE_WAIT_AFTER",
1307                             .or   = 1,
1308                           },
1309                 },
1310                 .type   = FIO_OPT_STR_MULTI,
1311                 .cb     = str_sfr_cb,
1312                 .off1   = td_var_offset(sync_file_range),
1313                 .help   = "Use sync_file_range()",
1314         },
1315 #endif
1316         {
1317                 .name   = "direct",
1318                 .type   = FIO_OPT_BOOL,
1319                 .off1   = td_var_offset(odirect),
1320                 .help   = "Use O_DIRECT IO (negates buffered)",
1321                 .def    = "0",
1322         },
1323         {
1324                 .name   = "buffered",
1325                 .type   = FIO_OPT_BOOL,
1326                 .off1   = td_var_offset(odirect),
1327                 .neg    = 1,
1328                 .help   = "Use buffered IO (negates direct)",
1329                 .def    = "1",
1330         },
1331         {
1332                 .name   = "overwrite",
1333                 .type   = FIO_OPT_BOOL,
1334                 .off1   = td_var_offset(overwrite),
1335                 .help   = "When writing, set whether to overwrite current data",
1336                 .def    = "0",
1337         },
1338         {
1339                 .name   = "loops",
1340                 .type   = FIO_OPT_INT,
1341                 .off1   = td_var_offset(loops),
1342                 .help   = "Number of times to run the job",
1343                 .def    = "1",
1344         },
1345         {
1346                 .name   = "numjobs",
1347                 .type   = FIO_OPT_INT,
1348                 .off1   = td_var_offset(numjobs),
1349                 .help   = "Duplicate this job this many times",
1350                 .def    = "1",
1351         },
1352         {
1353                 .name   = "startdelay",
1354                 .type   = FIO_OPT_STR_VAL_TIME,
1355                 .off1   = td_var_offset(start_delay),
1356                 .help   = "Only start job when this period has passed",
1357                 .def    = "0",
1358         },
1359         {
1360                 .name   = "runtime",
1361                 .alias  = "timeout",
1362                 .type   = FIO_OPT_STR_VAL_TIME,
1363                 .off1   = td_var_offset(timeout),
1364                 .help   = "Stop workload when this amount of time has passed",
1365                 .def    = "0",
1366         },
1367         {
1368                 .name   = "time_based",
1369                 .type   = FIO_OPT_STR_SET,
1370                 .off1   = td_var_offset(time_based),
1371                 .help   = "Keep running until runtime/timeout is met",
1372         },
1373         {
1374                 .name   = "ramp_time",
1375                 .type   = FIO_OPT_STR_VAL_TIME,
1376                 .off1   = td_var_offset(ramp_time),
1377                 .help   = "Ramp up time before measuring performance",
1378         },
1379         {
1380                 .name   = "clocksource",
1381                 .type   = FIO_OPT_STR,
1382                 .cb     = fio_clock_source_cb,
1383                 .off1   = td_var_offset(clocksource),
1384                 .help   = "What type of timing source to use",
1385                 .posval = {
1386                           { .ival = "gettimeofday",
1387                             .oval = CS_GTOD,
1388                             .help = "Use gettimeofday(2) for timing",
1389                           },
1390                           { .ival = "clock_gettime",
1391                             .oval = CS_CGETTIME,
1392                             .help = "Use clock_gettime(2) for timing",
1393                           },
1394 #ifdef ARCH_HAVE_CPU_CLOCK
1395                           { .ival = "cpu",
1396                             .oval = CS_CPUCLOCK,
1397                             .help = "Use CPU private clock",
1398                           },
1399 #endif
1400                 },
1401         },
1402         {
1403                 .name   = "mem",
1404                 .alias  = "iomem",
1405                 .type   = FIO_OPT_STR,
1406                 .cb     = str_mem_cb,
1407                 .off1   = td_var_offset(mem_type),
1408                 .help   = "Backing type for IO buffers",
1409                 .def    = "malloc",
1410                 .posval = {
1411                           { .ival = "malloc",
1412                             .oval = MEM_MALLOC,
1413                             .help = "Use malloc(3) for IO buffers",
1414                           },
1415                           { .ival = "shm",
1416                             .oval = MEM_SHM,
1417                             .help = "Use shared memory segments for IO buffers",
1418                           },
1419 #ifdef FIO_HAVE_HUGETLB
1420                           { .ival = "shmhuge",
1421                             .oval = MEM_SHMHUGE,
1422                             .help = "Like shm, but use huge pages",
1423                           },
1424 #endif
1425                           { .ival = "mmap",
1426                             .oval = MEM_MMAP,
1427                             .help = "Use mmap(2) (file or anon) for IO buffers",
1428                           },
1429 #ifdef FIO_HAVE_HUGETLB
1430                           { .ival = "mmaphuge",
1431                             .oval = MEM_MMAPHUGE,
1432                             .help = "Like mmap, but use huge pages",
1433                           },
1434 #endif
1435                   },
1436         },
1437         {
1438                 .name   = "iomem_align",
1439                 .alias  = "mem_align",
1440                 .type   = FIO_OPT_INT,
1441                 .off1   = td_var_offset(mem_align),
1442                 .minval = 0,
1443                 .help   = "IO memory buffer offset alignment",
1444                 .def    = "0",
1445                 .parent = "iomem",
1446         },
1447         {
1448                 .name   = "verify",
1449                 .type   = FIO_OPT_STR,
1450                 .off1   = td_var_offset(verify),
1451                 .help   = "Verify data written",
1452                 .cb     = str_verify_cb,
1453                 .def    = "0",
1454                 .posval = {
1455                           { .ival = "0",
1456                             .oval = VERIFY_NONE,
1457                             .help = "Don't do IO verification",
1458                           },
1459                           { .ival = "md5",
1460                             .oval = VERIFY_MD5,
1461                             .help = "Use md5 checksums for verification",
1462                           },
1463                           { .ival = "crc64",
1464                             .oval = VERIFY_CRC64,
1465                             .help = "Use crc64 checksums for verification",
1466                           },
1467                           { .ival = "crc32",
1468                             .oval = VERIFY_CRC32,
1469                             .help = "Use crc32 checksums for verification",
1470                           },
1471                           { .ival = "crc32c-intel",
1472                             .oval = VERIFY_CRC32C_INTEL,
1473                             .help = "Use hw crc32c checksums for verification",
1474                           },
1475                           { .ival = "crc32c",
1476                             .oval = VERIFY_CRC32C,
1477                             .help = "Use crc32c checksums for verification",
1478                           },
1479                           { .ival = "crc16",
1480                             .oval = VERIFY_CRC16,
1481                             .help = "Use crc16 checksums for verification",
1482                           },
1483                           { .ival = "crc7",
1484                             .oval = VERIFY_CRC7,
1485                             .help = "Use crc7 checksums for verification",
1486                           },
1487                           { .ival = "sha1",
1488                             .oval = VERIFY_SHA1,
1489                             .help = "Use sha1 checksums for verification",
1490                           },
1491                           { .ival = "sha256",
1492                             .oval = VERIFY_SHA256,
1493                             .help = "Use sha256 checksums for verification",
1494                           },
1495                           { .ival = "sha512",
1496                             .oval = VERIFY_SHA512,
1497                             .help = "Use sha512 checksums for verification",
1498                           },
1499                           { .ival = "meta",
1500                             .oval = VERIFY_META,
1501                             .help = "Use io information",
1502                           },
1503                           {
1504                             .ival = "null",
1505                             .oval = VERIFY_NULL,
1506                             .help = "Pretend to verify",
1507                           },
1508                 },
1509         },
1510         {
1511                 .name   = "do_verify",
1512                 .type   = FIO_OPT_BOOL,
1513                 .off1   = td_var_offset(do_verify),
1514                 .help   = "Run verification stage after write",
1515                 .def    = "1",
1516                 .parent = "verify",
1517         },
1518         {
1519                 .name   = "verifysort",
1520                 .type   = FIO_OPT_BOOL,
1521                 .off1   = td_var_offset(verifysort),
1522                 .help   = "Sort written verify blocks for read back",
1523                 .def    = "1",
1524                 .parent = "verify",
1525         },
1526         {
1527                 .name   = "verify_interval",
1528                 .type   = FIO_OPT_INT,
1529                 .off1   = td_var_offset(verify_interval),
1530                 .minval = 2 * sizeof(struct verify_header),
1531                 .help   = "Store verify buffer header every N bytes",
1532                 .parent = "verify",
1533         },
1534         {
1535                 .name   = "verify_offset",
1536                 .type   = FIO_OPT_INT,
1537                 .help   = "Offset verify header location by N bytes",
1538                 .def    = "0",
1539                 .cb     = str_verify_offset_cb,
1540                 .parent = "verify",
1541         },
1542         {
1543                 .name   = "verify_pattern",
1544                 .type   = FIO_OPT_STR,
1545                 .cb     = str_verify_pattern_cb,
1546                 .help   = "Fill pattern for IO buffers",
1547                 .parent = "verify",
1548         },
1549         {
1550                 .name   = "verify_fatal",
1551                 .type   = FIO_OPT_BOOL,
1552                 .off1   = td_var_offset(verify_fatal),
1553                 .def    = "0",
1554                 .help   = "Exit on a single verify failure, don't continue",
1555                 .parent = "verify",
1556         },
1557         {
1558                 .name   = "verify_dump",
1559                 .type   = FIO_OPT_BOOL,
1560                 .off1   = td_var_offset(verify_dump),
1561                 .def    = "1",
1562                 .help   = "Dump contents of good and bad blocks on failure",
1563                 .parent = "verify",
1564         },
1565         {
1566                 .name   = "verify_async",
1567                 .type   = FIO_OPT_INT,
1568                 .off1   = td_var_offset(verify_async),
1569                 .def    = "0",
1570                 .help   = "Number of async verifier threads to use",
1571                 .parent = "verify",
1572         },
1573         {
1574                 .name   = "verify_backlog",
1575                 .type   = FIO_OPT_STR_VAL,
1576                 .off1   = td_var_offset(verify_backlog),
1577                 .help   = "Verify after this number of blocks are written",
1578                 .parent = "verify",
1579         },
1580         {
1581                 .name   = "verify_backlog_batch",
1582                 .type   = FIO_OPT_INT,
1583                 .off1   = td_var_offset(verify_batch),
1584                 .help   = "Verify this number of IO blocks",
1585                 .parent = "verify",
1586         },
1587 #ifdef FIO_HAVE_CPU_AFFINITY
1588         {
1589                 .name   = "verify_async_cpus",
1590                 .type   = FIO_OPT_STR,
1591                 .cb     = str_verify_cpus_allowed_cb,
1592                 .help   = "Set CPUs allowed for async verify threads",
1593                 .parent = "verify_async",
1594         },
1595 #endif
1596 #ifdef FIO_HAVE_TRIM
1597         {
1598                 .name   = "trim_percentage",
1599                 .type   = FIO_OPT_INT,
1600                 .cb     = str_verify_trim_cb,
1601                 .maxval = 100,
1602                 .help   = "Number of verify blocks to discard/trim",
1603                 .parent = "verify",
1604                 .def    = "0",
1605         },
1606         {
1607                 .name   = "trim_verify_zero",
1608                 .type   = FIO_OPT_INT,
1609                 .help   = "Verify that trim/discarded blocks are returned as zeroes",
1610                 .off1   = td_var_offset(trim_zero),
1611                 .parent = "trim_percentage",
1612                 .def    = "1",
1613         },
1614         {
1615                 .name   = "trim_backlog",
1616                 .type   = FIO_OPT_STR_VAL,
1617                 .off1   = td_var_offset(trim_backlog),
1618                 .help   = "Trim after this number of blocks are written",
1619                 .parent = "trim_percentage",
1620         },
1621         {
1622                 .name   = "trim_backlog_batch",
1623                 .type   = FIO_OPT_INT,
1624                 .off1   = td_var_offset(trim_batch),
1625                 .help   = "Trim this number of IO blocks",
1626                 .parent = "trim_percentage",
1627         },
1628 #endif
1629         {
1630                 .name   = "write_iolog",
1631                 .type   = FIO_OPT_STR_STORE,
1632                 .off1   = td_var_offset(write_iolog_file),
1633                 .help   = "Store IO pattern to file",
1634         },
1635         {
1636                 .name   = "read_iolog",
1637                 .type   = FIO_OPT_STR_STORE,
1638                 .off1   = td_var_offset(read_iolog_file),
1639                 .help   = "Playback IO pattern from file",
1640         },
1641         {
1642                 .name   = "replay_no_stall",
1643                 .type   = FIO_OPT_INT,
1644                 .off1   = td_var_offset(no_stall),
1645                 .def    = "0",
1646                 .parent = "read_iolog",
1647                 .help   = "Playback IO pattern file as fast as possible without stalls",
1648         },
1649         {
1650                 .name   = "replay_redirect",
1651                 .type   = FIO_OPT_STR_STORE,
1652                 .off1   = td_var_offset(replay_redirect),
1653                 .parent = "read_iolog",
1654                 .help   = "Replay all I/O onto this device, regardless of trace device",
1655         },
1656         {
1657                 .name   = "exec_prerun",
1658                 .type   = FIO_OPT_STR_STORE,
1659                 .off1   = td_var_offset(exec_prerun),
1660                 .help   = "Execute this file prior to running job",
1661         },
1662         {
1663                 .name   = "exec_postrun",
1664                 .type   = FIO_OPT_STR_STORE,
1665                 .off1   = td_var_offset(exec_postrun),
1666                 .help   = "Execute this file after running job",
1667         },
1668 #ifdef FIO_HAVE_IOSCHED_SWITCH
1669         {
1670                 .name   = "ioscheduler",
1671                 .type   = FIO_OPT_STR_STORE,
1672                 .off1   = td_var_offset(ioscheduler),
1673                 .help   = "Use this IO scheduler on the backing device",
1674         },
1675 #endif
1676         {
1677                 .name   = "zonesize",
1678                 .type   = FIO_OPT_STR_VAL,
1679                 .off1   = td_var_offset(zone_size),
1680                 .help   = "Give size of an IO zone",
1681                 .def    = "0",
1682         },
1683         {
1684                 .name   = "zoneskip",
1685                 .type   = FIO_OPT_STR_VAL,
1686                 .off1   = td_var_offset(zone_skip),
1687                 .help   = "Space between IO zones",
1688                 .def    = "0",
1689         },
1690         {
1691                 .name   = "lockmem",
1692                 .type   = FIO_OPT_STR_VAL,
1693                 .cb     = str_lockmem_cb,
1694                 .help   = "Lock down this amount of memory",
1695                 .def    = "0",
1696         },
1697         {
1698                 .name   = "rwmixread",
1699                 .type   = FIO_OPT_INT,
1700                 .cb     = str_rwmix_read_cb,
1701                 .maxval = 100,
1702                 .help   = "Percentage of mixed workload that is reads",
1703                 .def    = "50",
1704         },
1705         {
1706                 .name   = "rwmixwrite",
1707                 .type   = FIO_OPT_INT,
1708                 .cb     = str_rwmix_write_cb,
1709                 .maxval = 100,
1710                 .help   = "Percentage of mixed workload that is writes",
1711                 .def    = "50",
1712         },
1713         {
1714                 .name   = "rwmixcycle",
1715                 .type   = FIO_OPT_DEPRECATED,
1716         },
1717         {
1718                 .name   = "nice",
1719                 .type   = FIO_OPT_INT,
1720                 .off1   = td_var_offset(nice),
1721                 .help   = "Set job CPU nice value",
1722                 .minval = -19,
1723                 .maxval = 20,
1724                 .def    = "0",
1725         },
1726 #ifdef FIO_HAVE_IOPRIO
1727         {
1728                 .name   = "prio",
1729                 .type   = FIO_OPT_INT,
1730                 .cb     = str_prio_cb,
1731                 .help   = "Set job IO priority value",
1732                 .minval = 0,
1733                 .maxval = 7,
1734         },
1735         {
1736                 .name   = "prioclass",
1737                 .type   = FIO_OPT_INT,
1738                 .cb     = str_prioclass_cb,
1739                 .help   = "Set job IO priority class",
1740                 .minval = 0,
1741                 .maxval = 3,
1742         },
1743 #endif
1744         {
1745                 .name   = "thinktime",
1746                 .type   = FIO_OPT_INT,
1747                 .off1   = td_var_offset(thinktime),
1748                 .help   = "Idle time between IO buffers (usec)",
1749                 .def    = "0",
1750         },
1751         {
1752                 .name   = "thinktime_spin",
1753                 .type   = FIO_OPT_INT,
1754                 .off1   = td_var_offset(thinktime_spin),
1755                 .help   = "Start think time by spinning this amount (usec)",
1756                 .def    = "0",
1757                 .parent = "thinktime",
1758         },
1759         {
1760                 .name   = "thinktime_blocks",
1761                 .type   = FIO_OPT_INT,
1762                 .off1   = td_var_offset(thinktime_blocks),
1763                 .help   = "IO buffer period between 'thinktime'",
1764                 .def    = "1",
1765                 .parent = "thinktime",
1766         },
1767         {
1768                 .name   = "rate",
1769                 .type   = FIO_OPT_INT,
1770                 .off1   = td_var_offset(rate[0]),
1771                 .off2   = td_var_offset(rate[1]),
1772                 .help   = "Set bandwidth rate",
1773         },
1774         {
1775                 .name   = "ratemin",
1776                 .type   = FIO_OPT_INT,
1777                 .off1   = td_var_offset(ratemin[0]),
1778                 .off2   = td_var_offset(ratemin[1]),
1779                 .help   = "Job must meet this rate or it will be shutdown",
1780                 .parent = "rate",
1781         },
1782         {
1783                 .name   = "rate_iops",
1784                 .type   = FIO_OPT_INT,
1785                 .off1   = td_var_offset(rate_iops[0]),
1786                 .off2   = td_var_offset(rate_iops[1]),
1787                 .help   = "Limit IO used to this number of IO operations/sec",
1788         },
1789         {
1790                 .name   = "rate_iops_min",
1791                 .type   = FIO_OPT_INT,
1792                 .off1   = td_var_offset(rate_iops_min[0]),
1793                 .off2   = td_var_offset(rate_iops_min[1]),
1794                 .help   = "Job must meet this rate or it will be shut down",
1795                 .parent = "rate_iops",
1796         },
1797         {
1798                 .name   = "ratecycle",
1799                 .type   = FIO_OPT_INT,
1800                 .off1   = td_var_offset(ratecycle),
1801                 .help   = "Window average for rate limits (msec)",
1802                 .def    = "1000",
1803                 .parent = "rate",
1804         },
1805         {
1806                 .name   = "invalidate",
1807                 .type   = FIO_OPT_BOOL,
1808                 .off1   = td_var_offset(invalidate_cache),
1809                 .help   = "Invalidate buffer/page cache prior to running job",
1810                 .def    = "1",
1811         },
1812         {
1813                 .name   = "sync",
1814                 .type   = FIO_OPT_BOOL,
1815                 .off1   = td_var_offset(sync_io),
1816                 .help   = "Use O_SYNC for buffered writes",
1817                 .def    = "0",
1818                 .parent = "buffered",
1819         },
1820         {
1821                 .name   = "bwavgtime",
1822                 .type   = FIO_OPT_INT,
1823                 .off1   = td_var_offset(bw_avg_time),
1824                 .help   = "Time window over which to calculate bandwidth"
1825                           " (msec)",
1826                 .def    = "500",
1827         },
1828         {
1829                 .name   = "create_serialize",
1830                 .type   = FIO_OPT_BOOL,
1831                 .off1   = td_var_offset(create_serialize),
1832                 .help   = "Serialize creating of job files",
1833                 .def    = "1",
1834         },
1835         {
1836                 .name   = "create_fsync",
1837                 .type   = FIO_OPT_BOOL,
1838                 .off1   = td_var_offset(create_fsync),
1839                 .help   = "fsync file after creation",
1840                 .def    = "1",
1841         },
1842         {
1843                 .name   = "create_on_open",
1844                 .type   = FIO_OPT_BOOL,
1845                 .off1   = td_var_offset(create_on_open),
1846                 .help   = "Create files when they are opened for IO",
1847                 .def    = "0",
1848         },
1849         {
1850                 .name   = "pre_read",
1851                 .type   = FIO_OPT_BOOL,
1852                 .off1   = td_var_offset(pre_read),
1853                 .help   = "Pre-read files before starting official testing",
1854                 .def    = "0",
1855         },
1856         {
1857                 .name   = "cpuload",
1858                 .type   = FIO_OPT_INT,
1859                 .off1   = td_var_offset(cpuload),
1860                 .help   = "Use this percentage of CPU",
1861         },
1862         {
1863                 .name   = "cpuchunks",
1864                 .type   = FIO_OPT_INT,
1865                 .off1   = td_var_offset(cpucycle),
1866                 .help   = "Length of the CPU burn cycles (usecs)",
1867                 .def    = "50000",
1868                 .parent = "cpuload",
1869         },
1870 #ifdef FIO_HAVE_CPU_AFFINITY
1871         {
1872                 .name   = "cpumask",
1873                 .type   = FIO_OPT_INT,
1874                 .cb     = str_cpumask_cb,
1875                 .help   = "CPU affinity mask",
1876         },
1877         {
1878                 .name   = "cpus_allowed",
1879                 .type   = FIO_OPT_STR,
1880                 .cb     = str_cpus_allowed_cb,
1881                 .help   = "Set CPUs allowed",
1882         },
1883 #endif
1884         {
1885                 .name   = "end_fsync",
1886                 .type   = FIO_OPT_BOOL,
1887                 .off1   = td_var_offset(end_fsync),
1888                 .help   = "Include fsync at the end of job",
1889                 .def    = "0",
1890         },
1891         {
1892                 .name   = "fsync_on_close",
1893                 .type   = FIO_OPT_BOOL,
1894                 .off1   = td_var_offset(fsync_on_close),
1895                 .help   = "fsync files on close",
1896                 .def    = "0",
1897         },
1898         {
1899                 .name   = "unlink",
1900                 .type   = FIO_OPT_BOOL,
1901                 .off1   = td_var_offset(unlink),
1902                 .help   = "Unlink created files after job has completed",
1903                 .def    = "0",
1904         },
1905         {
1906                 .name   = "exitall",
1907                 .type   = FIO_OPT_STR_SET,
1908                 .cb     = str_exitall_cb,
1909                 .help   = "Terminate all jobs when one exits",
1910         },
1911         {
1912                 .name   = "stonewall",
1913                 .alias  = "wait_for_previous",
1914                 .type   = FIO_OPT_STR_SET,
1915                 .off1   = td_var_offset(stonewall),
1916                 .help   = "Insert a hard barrier between this job and previous",
1917         },
1918         {
1919                 .name   = "new_group",
1920                 .type   = FIO_OPT_STR_SET,
1921                 .off1   = td_var_offset(new_group),
1922                 .help   = "Mark the start of a new group (for reporting)",
1923         },
1924         {
1925                 .name   = "thread",
1926                 .type   = FIO_OPT_STR_SET,
1927                 .off1   = td_var_offset(use_thread),
1928                 .help   = "Use threads instead of forks",
1929         },
1930         {
1931                 .name   = "write_bw_log",
1932                 .type   = FIO_OPT_STR,
1933                 .off1   = td_var_offset(write_bw_log),
1934                 .cb     = str_write_bw_log_cb,
1935                 .help   = "Write log of bandwidth during run",
1936         },
1937         {
1938                 .name   = "write_lat_log",
1939                 .type   = FIO_OPT_STR,
1940                 .off1   = td_var_offset(write_lat_log),
1941                 .cb     = str_write_lat_log_cb,
1942                 .help   = "Write log of latency during run",
1943         },
1944         {
1945                 .name   = "hugepage-size",
1946                 .type   = FIO_OPT_INT,
1947                 .off1   = td_var_offset(hugepage_size),
1948                 .help   = "When using hugepages, specify size of each page",
1949                 .def    = __stringify(FIO_HUGE_PAGE),
1950         },
1951         {
1952                 .name   = "group_reporting",
1953                 .type   = FIO_OPT_STR_SET,
1954                 .off1   = td_var_offset(group_reporting),
1955                 .help   = "Do reporting on a per-group basis",
1956         },
1957         {
1958                 .name   = "zero_buffers",
1959                 .type   = FIO_OPT_STR_SET,
1960                 .off1   = td_var_offset(zero_buffers),
1961                 .help   = "Init IO buffers to all zeroes",
1962         },
1963         {
1964                 .name   = "refill_buffers",
1965                 .type   = FIO_OPT_STR_SET,
1966                 .off1   = td_var_offset(refill_buffers),
1967                 .help   = "Refill IO buffers on every IO submit",
1968         },
1969         {
1970                 .name   = "scramble_buffers",
1971                 .type   = FIO_OPT_BOOL,
1972                 .off1   = td_var_offset(scramble_buffers),
1973                 .help   = "Slightly scramble buffers on every IO submit",
1974                 .def    = "1",
1975         },
1976         {
1977                 .name   = "clat_percentiles",
1978                 .type   = FIO_OPT_BOOL,
1979                 .off1   = td_var_offset(clat_percentiles),
1980                 .help   = "Enable the reporting of completion latency percentiles",
1981                 .def    = "0",
1982         },
1983         {
1984                 .name   = "percentile_list",
1985                 .type   = FIO_OPT_FLOAT_LIST,
1986                 .off1   = td_var_offset(percentile_list),
1987                 .off2   = td_var_offset(overwrite_plist),
1988                 .help   = "Specify a custom list of percentiles to report",
1989                 .maxlen = FIO_IO_U_LIST_MAX_LEN,
1990                 .minfp  = 0.0,
1991                 .maxfp  = 100.0,
1992         },
1993
1994 #ifdef FIO_HAVE_DISK_UTIL
1995         {
1996                 .name   = "disk_util",
1997                 .type   = FIO_OPT_BOOL,
1998                 .off1   = td_var_offset(do_disk_util),
1999                 .help   = "Log disk utilization statistics",
2000                 .def    = "1",
2001         },
2002 #endif
2003         {
2004                 .name   = "gtod_reduce",
2005                 .type   = FIO_OPT_BOOL,
2006                 .help   = "Greatly reduce number of gettimeofday() calls",
2007                 .cb     = str_gtod_reduce_cb,
2008                 .def    = "0",
2009         },
2010         {
2011                 .name   = "disable_lat",
2012                 .type   = FIO_OPT_BOOL,
2013                 .off1   = td_var_offset(disable_lat),
2014                 .help   = "Disable latency numbers",
2015                 .parent = "gtod_reduce",
2016                 .def    = "0",
2017         },
2018         {
2019                 .name   = "disable_clat",
2020                 .type   = FIO_OPT_BOOL,
2021                 .off1   = td_var_offset(disable_clat),
2022                 .help   = "Disable completion latency numbers",
2023                 .parent = "gtod_reduce",
2024                 .def    = "0",
2025         },
2026         {
2027                 .name   = "disable_slat",
2028                 .type   = FIO_OPT_BOOL,
2029                 .off1   = td_var_offset(disable_slat),
2030                 .help   = "Disable submission latency numbers",
2031                 .parent = "gtod_reduce",
2032                 .def    = "0",
2033         },
2034         {
2035                 .name   = "disable_bw_measurement",
2036                 .type   = FIO_OPT_BOOL,
2037                 .off1   = td_var_offset(disable_bw),
2038                 .help   = "Disable bandwidth logging",
2039                 .parent = "gtod_reduce",
2040                 .def    = "0",
2041         },
2042         {
2043                 .name   = "gtod_cpu",
2044                 .type   = FIO_OPT_INT,
2045                 .cb     = str_gtod_cpu_cb,
2046                 .help   = "Set up dedicated gettimeofday() thread on this CPU",
2047                 .verify = gtod_cpu_verify,
2048         },
2049         {
2050                 .name   = "continue_on_error",
2051                 .type   = FIO_OPT_BOOL,
2052                 .off1   = td_var_offset(continue_on_error),
2053                 .help   = "Continue on non-fatal errors during IO",
2054                 .def    = "0",
2055         },
2056         {
2057                 .name   = "profile",
2058                 .type   = FIO_OPT_STR_STORE,
2059                 .off1   = td_var_offset(profile),
2060                 .help   = "Select a specific builtin performance test",
2061         },
2062         {
2063                 .name   = "cgroup",
2064                 .type   = FIO_OPT_STR_STORE,
2065                 .off1   = td_var_offset(cgroup),
2066                 .help   = "Add job to cgroup of this name",
2067         },
2068         {
2069                 .name   = "cgroup_weight",
2070                 .type   = FIO_OPT_INT,
2071                 .off1   = td_var_offset(cgroup_weight),
2072                 .help   = "Use given weight for cgroup",
2073                 .minval = 100,
2074                 .maxval = 1000,
2075         },
2076         {
2077                 .name   = "cgroup_nodelete",
2078                 .type   = FIO_OPT_BOOL,
2079                 .off1   = td_var_offset(cgroup_nodelete),
2080                 .help   = "Do not delete cgroups after job completion",
2081                 .def    = "0",
2082         },
2083         {
2084                 .name   = "uid",
2085                 .type   = FIO_OPT_INT,
2086                 .off1   = td_var_offset(uid),
2087                 .help   = "Run job with this user ID",
2088         },
2089         {
2090                 .name   = "gid",
2091                 .type   = FIO_OPT_INT,
2092                 .off1   = td_var_offset(gid),
2093                 .help   = "Run job with this group ID",
2094         },
2095         {
2096                 .name = NULL,
2097         },
2098 };
2099
2100 static void add_to_lopt(struct option *lopt, struct fio_option *o,
2101                         const char *name)
2102 {
2103         lopt->name = (char *) name;
2104         lopt->val = FIO_GETOPT_JOB;
2105         if (o->type == FIO_OPT_STR_SET)
2106                 lopt->has_arg = no_argument;
2107         else
2108                 lopt->has_arg = required_argument;
2109 }
2110
2111 void fio_options_dup_and_init(struct option *long_options)
2112 {
2113         struct fio_option *o;
2114         unsigned int i;
2115
2116         options_init(options);
2117
2118         i = 0;
2119         while (long_options[i].name)
2120                 i++;
2121
2122         o = &options[0];
2123         while (o->name) {
2124                 add_to_lopt(&long_options[i], o, o->name);
2125                 if (o->alias) {
2126                         i++;
2127                         add_to_lopt(&long_options[i], o, o->alias);
2128                 }
2129
2130                 i++;
2131                 o++;
2132                 assert(i < FIO_NR_OPTIONS);
2133         }
2134 }
2135
2136 struct fio_keyword {
2137         const char *word;
2138         const char *desc;
2139         char *replace;
2140 };
2141
2142 static struct fio_keyword fio_keywords[] = {
2143         {
2144                 .word   = "$pagesize",
2145                 .desc   = "Page size in the system",
2146         },
2147         {
2148                 .word   = "$mb_memory",
2149                 .desc   = "Megabytes of memory online",
2150         },
2151         {
2152                 .word   = "$ncpus",
2153                 .desc   = "Number of CPUs online in the system",
2154         },
2155         {
2156                 .word   = NULL,
2157         },
2158 };
2159
2160 void fio_keywords_init(void)
2161 {
2162         unsigned long long mb_memory;
2163         char buf[128];
2164         long l;
2165
2166         sprintf(buf, "%lu", page_size);
2167         fio_keywords[0].replace = strdup(buf);
2168
2169         mb_memory = os_phys_mem() / (1024 * 1024);
2170         sprintf(buf, "%llu", mb_memory);
2171         fio_keywords[1].replace = strdup(buf);
2172
2173         l = cpus_online();
2174         sprintf(buf, "%lu", l);
2175         fio_keywords[2].replace = strdup(buf);
2176 }
2177
2178 #define BC_APP          "bc"
2179
2180 static char *bc_calc(char *str)
2181 {
2182         char *buf, *tmp, opt[80];
2183         FILE *f;
2184         int ret;
2185
2186         /*
2187          * No math, just return string
2188          */
2189         if (!strchr(str, '+') && !strchr(str, '-') && !strchr(str, '*') &&
2190             !strchr(str, '/'))
2191                 return str;
2192
2193         /*
2194          * Split option from value, we only need to calculate the value
2195          */
2196         tmp = strchr(str, '=');
2197         if (!tmp)
2198                 return str;
2199
2200         tmp++;
2201         memset(opt, 0, sizeof(opt));
2202         strncpy(opt, str, tmp - str);
2203
2204         buf = malloc(128);
2205
2206         sprintf(buf, "which %s > /dev/null", BC_APP);
2207         if (system(buf)) {
2208                 log_err("fio: bc is needed for performing math\n");
2209                 free(buf);
2210                 return NULL;
2211         }
2212
2213         sprintf(buf, "echo %s | %s", tmp, BC_APP);
2214         f = popen(buf, "r");
2215         if (!f) {
2216                 free(buf);
2217                 return NULL;
2218         }
2219
2220         ret = fread(buf, 1, 128, f);
2221         if (ret <= 0) {
2222                 free(buf);
2223                 return NULL;
2224         }
2225
2226         buf[ret - 1] = '\0';
2227         strcat(opt, buf);
2228         strcpy(buf, opt);
2229         pclose(f);
2230         free(str);
2231         return buf;
2232 }
2233
2234 /*
2235  * Look for reserved variable names and replace them with real values
2236  */
2237 static char *fio_keyword_replace(char *opt)
2238 {
2239         char *s;
2240         int i;
2241
2242         for (i = 0; fio_keywords[i].word != NULL; i++) {
2243                 struct fio_keyword *kw = &fio_keywords[i];
2244
2245                 while ((s = strstr(opt, kw->word)) != NULL) {
2246                         char *new = malloc(strlen(opt) + 1);
2247                         char *o_org = opt;
2248                         int olen = s - opt;
2249                         int len;
2250
2251                         /*
2252                          * Copy part of the string before the keyword and
2253                          * sprintf() the replacement after it.
2254                          */
2255                         memcpy(new, opt, olen);
2256                         len = sprintf(new + olen, "%s", kw->replace);
2257
2258                         /*
2259                          * If there's more in the original string, copy that
2260                          * in too
2261                          */
2262                         opt += strlen(kw->word) + olen;
2263                         if (strlen(opt))
2264                                 memcpy(new + olen + len, opt, opt - o_org - 1);
2265
2266                         /*
2267                          * replace opt and free the old opt
2268                          */
2269                         opt = new;
2270                         //free(o_org);
2271
2272                         /*
2273                          * Check for potential math and invoke bc, if possible
2274                          */
2275                         opt = bc_calc(opt);
2276                 }
2277         }
2278
2279         return opt;
2280 }
2281
2282 int fio_options_parse(struct thread_data *td, char **opts, int num_opts)
2283 {
2284         int i, ret;
2285
2286         sort_options(opts, options, num_opts);
2287
2288         for (ret = 0, i = 0; i < num_opts; i++) {
2289                 opts[i] = fio_keyword_replace(opts[i]);
2290                 ret |= parse_option(opts[i], options, td);
2291         }
2292
2293         return ret;
2294 }
2295
2296 int fio_cmd_option_parse(struct thread_data *td, const char *opt, char *val)
2297 {
2298         return parse_cmd_option(opt, val, options, td);
2299 }
2300
2301 void fio_fill_default_options(struct thread_data *td)
2302 {
2303         fill_default_options(td, options);
2304 }
2305
2306 int fio_show_option_help(const char *opt)
2307 {
2308         return show_cmd_help(options, opt);
2309 }
2310
2311 static void __options_mem(struct thread_data *td, int alloc)
2312 {
2313         struct thread_options *o = &td->o;
2314         struct fio_option *opt;
2315         char **ptr;
2316         int i;
2317
2318         for (i = 0, opt = &options[0]; opt->name; i++, opt = &options[i]) {
2319                 if (opt->type != FIO_OPT_STR_STORE)
2320                         continue;
2321
2322                 ptr = (void *) o + opt->off1;
2323                 if (*ptr) {
2324                         if (alloc)
2325                                 *ptr = strdup(*ptr);
2326                         else {
2327                                 free(*ptr);
2328                                 *ptr = NULL;
2329                         }
2330                 }
2331         }
2332 }
2333
2334 /*
2335  * dupe FIO_OPT_STR_STORE options
2336  */
2337 void options_mem_dupe(struct thread_data *td)
2338 {
2339         __options_mem(td, 1);
2340 }
2341
2342 void options_mem_free(struct thread_data fio_unused *td)
2343 {
2344 #if 0
2345         __options_mem(td, 0);
2346 #endif
2347 }
2348
2349 unsigned int fio_get_kb_base(void *data)
2350 {
2351         struct thread_data *td = data;
2352         unsigned int kb_base = 0;
2353
2354         if (td)
2355                 kb_base = td->o.kb_base;
2356         if (!kb_base)
2357                 kb_base = 1024;
2358
2359         return kb_base;
2360 }
2361
2362 int add_option(struct fio_option *o)
2363 {
2364         struct fio_option *__o;
2365         int opt_index = 0;
2366
2367         __o = options;
2368         while (__o->name) {
2369                 opt_index++;
2370                 __o++;
2371         }
2372
2373         memcpy(&options[opt_index], o, sizeof(*o));
2374         return 0;
2375 }
2376
2377 void invalidate_profile_options(const char *prof_name)
2378 {
2379         struct fio_option *o;
2380
2381         o = options;
2382         while (o->name) {
2383                 if (o->prof_name && !strcmp(o->prof_name, prof_name)) {
2384                         o->type = FIO_OPT_INVALID;
2385                         o->prof_name = NULL;
2386                 }
2387                 o++;
2388         }
2389 }
2390
2391 void add_opt_posval(const char *optname, const char *ival, const char *help)
2392 {
2393         struct fio_option *o;
2394         unsigned int i;
2395
2396         o = find_option(options, optname);
2397         if (!o)
2398                 return;
2399
2400         for (i = 0; i < PARSE_MAX_VP; i++) {
2401                 if (o->posval[i].ival)
2402                         continue;
2403
2404                 o->posval[i].ival = ival;
2405                 o->posval[i].help = help;
2406                 break;
2407         }
2408 }
2409
2410 void del_opt_posval(const char *optname, const char *ival)
2411 {
2412         struct fio_option *o;
2413         unsigned int i;
2414
2415         o = find_option(options, optname);
2416         if (!o)
2417                 return;
2418
2419         for (i = 0; i < PARSE_MAX_VP; i++) {
2420                 if (!o->posval[i].ival)
2421                         continue;
2422                 if (strcmp(o->posval[i].ival, ival))
2423                         continue;
2424
2425                 o->posval[i].ival = NULL;
2426                 o->posval[i].help = NULL;
2427         }
2428 }