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, *ddir;
 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                 ddir = strchr(odir + 1, ',');
 180                 if (ddir) {
 181                         ret = bssplit_ddir(td, DDIR_TRIM, ddir + 1);
 182                         if (!ret)
 183                                 *ddir = '\0';
 184                 } else {
 185                         char *op;
 186
 187                         op = strdup(odir + 1);
 188                         ret = bssplit_ddir(td, DDIR_TRIM, op);
 189
 190                         free(op);
 191                 }
 192                 if (!ret)
 193                         ret = bssplit_ddir(td, DDIR_WRITE, odir + 1);
 194                 if (!ret) {
 195                         *odir = '\0';
 196                         ret = bssplit_ddir(td, DDIR_READ, str);
 197                 }
 198         } else {
 199                 char *op;
 200
 201                 op = strdup(str);
 202                 ret = bssplit_ddir(td, DDIR_WRITE, op);
 203                 free(op);
 204
 205                 if (!ret) {
 206                         op = strdup(str);
 207                         ret = bssplit_ddir(td, DDIR_TRIM, op);
 208                         free(op);
 209                 }
 210                 ret = bssplit_ddir(td, DDIR_READ, str);
 211         }
 212
 213         free(p);
 214         return ret;
 215 }
 216
 217 static int str_rw_cb(void *data, const char *str)
 218 {
 219         struct thread_data *td = data;
 220         char *nr = get_opt_postfix(str);
 221
 222         td->o.ddir_seq_nr = 1;
 223         td->o.ddir_seq_add = 0;
 224
 225         if (!nr)
 226                 return 0;
 227
 228         if (td_random(td))
 229                 td->o.ddir_seq_nr = atoi(nr);
 230         else {
 231                 long long val;
 232
 233                 if (str_to_decimal(nr, &val, 1, td)) {
 234                         log_err("fio: rw postfix parsing failed\n");
 235                         free(nr);
 236                         return 1;
 237                 }
 238
 239                 td->o.ddir_seq_add = val;
 240         }
 241
 242         free(nr);
 243         return 0;
 244 }
 245
 246 static int str_mem_cb(void *data, const char *mem)
 247 {
 248         struct thread_data *td = data;
 249
 250         if (td->o.mem_type == MEM_MMAPHUGE || td->o.mem_type == MEM_MMAP) {
 251                 td->mmapfile = get_opt_postfix(mem);
 252                 if (td->o.mem_type == MEM_MMAPHUGE && !td->mmapfile) {
 253                         log_err("fio: mmaphuge:/path/to/file\n");
 254                         return 1;
 255                 }
 256         }
 257
 258         return 0;
 259 }
 260
 261 static int str_verify_cb(void *data, const char *mem)
 262 {
 263         struct thread_data *td = data;
 264
 265         if (td->o.verify == VERIFY_CRC32C_INTEL ||
 266             td->o.verify == VERIFY_CRC32C) {
 267                 crc32c_intel_probe();
 268         }
 269
 270         return 0;
 271 }
 272
 273 static int fio_clock_source_cb(void *data, const char *str)
 274 {
 275         struct thread_data *td = data;
 276
 277         fio_clock_source = td->o.clocksource;
 278         fio_time_init();
 279         return 0;
 280 }
 281
 282 static int str_lockmem_cb(void fio_unused *data, unsigned long long *val)
 283 {
 284         mlock_size = *val;
 285         return 0;
 286 }
 287
 288 static int str_rwmix_read_cb(void *data, unsigned long long *val)
 289 {
 290         struct thread_data *td = data;
 291
 292         td->o.rwmix[DDIR_READ] = *val;
 293         td->o.rwmix[DDIR_WRITE] = 100 - *val;
 294         return 0;
 295 }
 296
 297 static int str_rwmix_write_cb(void *data, unsigned long long *val)
 298 {
 299         struct thread_data *td = data;
 300
 301         td->o.rwmix[DDIR_WRITE] = *val;
 302         td->o.rwmix[DDIR_READ] = 100 - *val;
 303         return 0;
 304 }
 305
 306 #ifdef FIO_HAVE_IOPRIO
 307 static int str_prioclass_cb(void *data, unsigned long long *val)
 308 {
 309         struct thread_data *td = data;
 310         unsigned short mask;
 311
 312         /*
 313          * mask off old class bits, str_prio_cb() may have set a default class
 314          */
 315         mask = (1 << IOPRIO_CLASS_SHIFT) - 1;
 316         td->ioprio &= mask;
 317
 318         td->ioprio |= *val << IOPRIO_CLASS_SHIFT;
 319         td->ioprio_set = 1;
 320         return 0;
 321 }
 322
 323 static int str_prio_cb(void *data, unsigned long long *val)
 324 {
 325         struct thread_data *td = data;
 326
 327         td->ioprio |= *val;
 328
 329         /*
 330          * If no class is set, assume BE
 331          */
 332         if ((td->ioprio >> IOPRIO_CLASS_SHIFT) == 0)
 333                 td->ioprio |= IOPRIO_CLASS_BE << IOPRIO_CLASS_SHIFT;
 334
 335         td->ioprio_set = 1;
 336         return 0;
 337 }
 338 #endif
 339
 340 static int str_exitall_cb(void)
 341 {
 342         exitall_on_terminate = 1;
 343         return 0;
 344 }
 345
 346 #ifdef FIO_HAVE_CPU_AFFINITY
 347 static int str_cpumask_cb(void *data, unsigned long long *val)
 348 {
 349         struct thread_data *td = data;
 350         unsigned int i;
 351         long max_cpu;
 352         int ret;
 353
 354         ret = fio_cpuset_init(&td->o.cpumask);
 355         if (ret < 0) {
 356                 log_err("fio: cpuset_init failed\n");
 357                 td_verror(td, ret, "fio_cpuset_init");
 358                 return 1;
 359         }
 360
 361         max_cpu = cpus_online();
 362
 363         for (i = 0; i < sizeof(int) * 8; i++) {
 364                 if ((1 << i) & *val) {
 365                         if (i > max_cpu) {
 366                                 log_err("fio: CPU %d too large (max=%ld)\n", i,
 367                                                                 max_cpu);
 368                                 return 1;
 369                         }
 370                         dprint(FD_PARSE, "set cpu allowed %d\n", i);
 371                         fio_cpu_set(&td->o.cpumask, i);
 372                 }
 373         }
 374
 375         td->o.cpumask_set = 1;
 376         return 0;
 377 }
 378
 379 static int set_cpus_allowed(struct thread_data *td, os_cpu_mask_t *mask,
 380                             const char *input)
 381 {
 382         char *cpu, *str, *p;
 383         long max_cpu;
 384         int ret = 0;
 385
 386         ret = fio_cpuset_init(mask);
 387         if (ret < 0) {
 388                 log_err("fio: cpuset_init failed\n");
 389                 td_verror(td, ret, "fio_cpuset_init");
 390                 return 1;
 391         }
 392
 393         p = str = strdup(input);
 394
 395         strip_blank_front(&str);
 396         strip_blank_end(str);
 397
 398         max_cpu = cpus_online();
 399
 400         while ((cpu = strsep(&str, ",")) != NULL) {
 401                 char *str2, *cpu2;
 402                 int icpu, icpu2;
 403
 404                 if (!strlen(cpu))
 405                         break;
 406
 407                 str2 = cpu;
 408                 icpu2 = -1;
 409                 while ((cpu2 = strsep(&str2, "-")) != NULL) {
 410                         if (!strlen(cpu2))
 411                                 break;
 412
 413                         icpu2 = atoi(cpu2);
 414                 }
 415
 416                 icpu = atoi(cpu);
 417                 if (icpu2 == -1)
 418                         icpu2 = icpu;
 419                 while (icpu <= icpu2) {
 420                         if (icpu >= FIO_MAX_CPUS) {
 421                                 log_err("fio: your OS only supports up to"
 422                                         " %d CPUs\n", (int) FIO_MAX_CPUS);
 423                                 ret = 1;
 424                                 break;
 425                         }
 426                         if (icpu > max_cpu) {
 427                                 log_err("fio: CPU %d too large (max=%ld)\n",
 428                                                         icpu, max_cpu);
 429                                 ret = 1;
 430                                 break;
 431                         }
 432
 433                         dprint(FD_PARSE, "set cpu allowed %d\n", icpu);
 434                         fio_cpu_set(mask, icpu);
 435                         icpu++;
 436                 }
 437                 if (ret)
 438                         break;
 439         }
 440
 441         free(p);
 442         if (!ret)
 443                 td->o.cpumask_set = 1;
 444         return ret;
 445 }
 446
 447 static int str_cpus_allowed_cb(void *data, const char *input)
 448 {
 449         struct thread_data *td = data;
 450         int ret;
 451
 452         ret = set_cpus_allowed(td, &td->o.cpumask, input);
 453         if (!ret)
 454                 td->o.cpumask_set = 1;
 455
 456         return ret;
 457 }
 458
 459 static int str_verify_cpus_allowed_cb(void *data, const char *input)
 460 {
 461         struct thread_data *td = data;
 462         int ret;
 463
 464         ret = set_cpus_allowed(td, &td->o.verify_cpumask, input);
 465         if (!ret)
 466                 td->o.verify_cpumask_set = 1;
 467
 468         return ret;
 469 }
 470 #endif
 471
 472 #ifdef FIO_HAVE_TRIM
 473 static int str_verify_trim_cb(void *data, unsigned long long *val)
 474 {
 475         struct thread_data *td = data;
 476
 477         td->o.trim_percentage = *val;
 478         return 0;
 479 }
 480 #endif
 481
 482 static int str_fst_cb(void *data, const char *str)
 483 {
 484         struct thread_data *td = data;
 485         char *nr = get_opt_postfix(str);
 486
 487         td->file_service_nr = 1;
 488         if (nr) {
 489                 td->file_service_nr = atoi(nr);
 490                 free(nr);
 491         }
 492
 493         return 0;
 494 }
 495
 496 #ifdef FIO_HAVE_SYNC_FILE_RANGE
 497 static int str_sfr_cb(void *data, const char *str)
 498 {
 499         struct thread_data *td = data;
 500         char *nr = get_opt_postfix(str);
 501
 502         td->sync_file_range_nr = 1;
 503         if (nr) {
 504                 td->sync_file_range_nr = atoi(nr);
 505                 free(nr);
 506         }
 507
 508         return 0;
 509 }
 510 #endif
 511
 512 static int check_dir(struct thread_data *td, char *fname)
 513 {
 514 #if 0
 515         char file[PATH_MAX], *dir;
 516         int elen = 0;
 517
 518         if (td->o.directory) {
 519                 strcpy(file, td->o.directory);
 520                 strcat(file, "/");
 521                 elen = strlen(file);
 522         }
 523
 524         sprintf(file + elen, "%s", fname);
 525         dir = dirname(file);
 526
 527         {
 528         struct stat sb;
 529         /*
 530          * We can't do this on FIO_DISKLESSIO engines. The engine isn't loaded
 531          * yet, so we can't do this check right here...
 532          */
 533         if (lstat(dir, &sb) < 0) {
 534                 int ret = errno;
 535
 536                 log_err("fio: %s is not a directory\n", dir);
 537                 td_verror(td, ret, "lstat");
 538                 return 1;
 539         }
 540
 541         if (!S_ISDIR(sb.st_mode)) {
 542                 log_err("fio: %s is not a directory\n", dir);
 543                 return 1;
 544         }
 545         }
 546 #endif
 547
 548         return 0;
 549 }
 550
 551 /*
 552  * Return next file in the string. Files are separated with ':'. If the ':'
 553  * is escaped with a '\', then that ':' is part of the filename and does not
 554  * indicate a new file.
 555  */
 556 static char *get_next_file_name(char **ptr)
 557 {
 558         char *str = *ptr;
 559         char *p, *start;
 560
 561         if (!str || !strlen(str))
 562                 return NULL;
 563
 564         start = str;
 565         do {
 566                 /*
 567                  * No colon, we are done
 568                  */
 569                 p = strchr(str, ':');
 570                 if (!p) {
 571                         *ptr = NULL;
 572                         break;
 573                 }
 574
 575                 /*
 576                  * We got a colon, but it's the first character. Skip and
 577                  * continue
 578                  */
 579                 if (p == start) {
 580                         str = ++start;
 581                         continue;
 582                 }
 583
 584                 if (*(p - 1) != '\\') {
 585                         *p = '\0';
 586                         *ptr = p + 1;
 587                         break;
 588                 }
 589
 590                 memmove(p - 1, p, strlen(p) + 1);
 591                 str = p;
 592         } while (1);
 593
 594         return start;
 595 }
 596
 597 static int str_filename_cb(void *data, const char *input)
 598 {
 599         struct thread_data *td = data;
 600         char *fname, *str, *p;
 601
 602         p = str = strdup(input);
 603
 604         strip_blank_front(&str);
 605         strip_blank_end(str);
 606
 607         if (!td->files_index)
 608                 td->o.nr_files = 0;
 609
 610         while ((fname = get_next_file_name(&str)) != NULL) {
 611                 if (!strlen(fname))
 612                         break;
 613                 if (check_dir(td, fname)) {
 614                         free(p);
 615                         return 1;
 616                 }
 617                 add_file(td, fname);
 618                 td->o.nr_files++;
 619         }
 620
 621         free(p);
 622         return 0;
 623 }
 624
 625 static int str_directory_cb(void *data, const char fio_unused *str)
 626 {
 627         struct thread_data *td = data;
 628         struct stat sb;
 629
 630         if (lstat(td->o.directory, &sb) < 0) {
 631                 int ret = errno;
 632
 633                 log_err("fio: %s is not a directory\n", td->o.directory);
 634                 td_verror(td, ret, "lstat");
 635                 return 1;
 636         }
 637         if (!S_ISDIR(sb.st_mode)) {
 638                 log_err("fio: %s is not a directory\n", td->o.directory);
 639                 return 1;
 640         }
 641
 642         return 0;
 643 }
 644
 645 static int str_opendir_cb(void *data, const char fio_unused *str)
 646 {
 647         struct thread_data *td = data;
 648
 649         if (!td->files_index)
 650                 td->o.nr_files = 0;
 651
 652         return add_dir_files(td, td->o.opendir);
 653 }
 654
 655 static int str_verify_offset_cb(void *data, unsigned long long *off)
 656 {
 657         struct thread_data *td = data;
 658
 659         if (*off && *off < sizeof(struct verify_header)) {
 660                 log_err("fio: verify_offset too small\n");
 661                 return 1;
 662         }
 663
 664         td->o.verify_offset = *off;
 665         return 0;
 666 }
 667
 668 static int str_verify_pattern_cb(void *data, const char *input)
 669 {
 670         struct thread_data *td = data;
 671         long off;
 672         int i = 0, j = 0, len, k, base = 10;
 673         char* loc1, * loc2;
 674
 675         loc1 = strstr(input, "0x");
 676         loc2 = strstr(input, "0X");
 677         if (loc1 || loc2)
 678                 base = 16;
 679         off = strtol(input, NULL, base);
 680         if (off != LONG_MAX || errno != ERANGE) {
 681                 while (off) {
 682                         td->o.verify_pattern[i] = off & 0xff;
 683                         off >>= 8;
 684                         i++;
 685                 }
 686         } else {
 687                 len = strlen(input);
 688                 k = len - 1;
 689                 if (base == 16) {
 690                         if (loc1)
 691                                 j = loc1 - input + 2;
 692                         else
 693                                 j = loc2 - input + 2;
 694                 } else
 695                         return 1;
 696                 if (len - j < MAX_PATTERN_SIZE * 2) {
 697                         while (k >= j) {
 698                                 off = converthexchartoint(input[k--]);
 699                                 if (k >= j)
 700                                         off += (converthexchartoint(input[k--])
 701                                                 * 16);
 702                                 td->o.verify_pattern[i++] = (char) off;
 703                         }
 704                 }
 705         }
 706
 707         /*
 708          * Fill the pattern all the way to the end. This greatly reduces
 709          * the number of memcpy's we have to do when verifying the IO.
 710          */
 711         while (i > 1 && i * 2 <= MAX_PATTERN_SIZE) {
 712                 memcpy(&td->o.verify_pattern[i], &td->o.verify_pattern[0], i);
 713                 i *= 2;
 714         }
 715         if (i == 1) {
 716                 /*
 717                  * The code in verify_io_u_pattern assumes a single byte pattern
 718                  * fills the whole verify pattern buffer.
 719                  */
 720                 memset(td->o.verify_pattern, td->o.verify_pattern[0],
 721                        MAX_PATTERN_SIZE);
 722         }
 723
 724         td->o.verify_pattern_bytes = i;
 725
 726         /*
 727          * VERIFY_META could already be set
 728          */
 729         if (td->o.verify == VERIFY_NONE)
 730                 td->o.verify = VERIFY_PATTERN;
 731
 732         return 0;
 733 }
 734
 735 static int str_lockfile_cb(void *data, const char *str)
 736 {
 737         struct thread_data *td = data;
 738         char *nr = get_opt_postfix(str);
 739
 740         td->o.lockfile_batch = 1;
 741         if (nr) {
 742                 td->o.lockfile_batch = atoi(nr);
 743                 free(nr);
 744         }
 745
 746         return 0;
 747 }
 748
 749 static int str_write_bw_log_cb(void *data, const char *str)
 750 {
 751         struct thread_data *td = data;
 752
 753         if (str)
 754                 td->o.bw_log_file = strdup(str);
 755
 756         td->o.write_bw_log = 1;
 757         return 0;
 758 }
 759
 760 static int str_write_lat_log_cb(void *data, const char *str)
 761 {
 762         struct thread_data *td = data;
 763
 764         if (str)
 765                 td->o.lat_log_file = strdup(str);
 766
 767         td->o.write_lat_log = 1;
 768         return 0;
 769 }
 770
 771 static int str_write_iops_log_cb(void *data, const char *str)
 772 {
 773         struct thread_data *td = data;
 774
 775         if (str)
 776                 td->o.iops_log_file = strdup(str);
 777
 778         td->o.write_iops_log = 1;
 779         return 0;
 780 }
 781
 782 static int str_gtod_reduce_cb(void *data, int *il)
 783 {
 784         struct thread_data *td = data;
 785         int val = *il;
 786
 787         td->o.disable_lat = !!val;
 788         td->o.disable_clat = !!val;
 789         td->o.disable_slat = !!val;
 790         td->o.disable_bw = !!val;
 791         td->o.clat_percentiles = !val;
 792         if (val)
 793                 td->tv_cache_mask = 63;
 794
 795         return 0;
 796 }
 797
 798 static int str_gtod_cpu_cb(void *data, long long *il)
 799 {
 800         struct thread_data *td = data;
 801         int val = *il;
 802
 803         td->o.gtod_cpu = val;
 804         td->o.gtod_offload = 1;
 805         return 0;
 806 }
 807
 808 static int str_size_cb(void *data, unsigned long long *__val)
 809 {
 810         struct thread_data *td = data;
 811         unsigned long long v = *__val;
 812
 813         if (parse_is_percent(v)) {
 814                 td->o.size = 0;
 815                 td->o.size_percent = -1ULL - v;
 816         } else
 817                 td->o.size = v;
 818
 819         return 0;
 820 }
 821
 822 static int rw_verify(struct fio_option *o, void *data)
 823 {
 824         struct thread_data *td = data;
 825
 826         if (read_only && td_write(td)) {
 827                 log_err("fio: job <%s> has write bit set, but fio is in"
 828                         " read-only mode\n", td->o.name);
 829                 return 1;
 830         }
 831
 832         return 0;
 833 }
 834
 835 static int gtod_cpu_verify(struct fio_option *o, void *data)
 836 {
 837 #ifndef FIO_HAVE_CPU_AFFINITY
 838         struct thread_data *td = data;
 839
 840         if (td->o.gtod_cpu) {
 841                 log_err("fio: platform must support CPU affinity for"
 842                         "gettimeofday() offloading\n");
 843                 return 1;
 844         }
 845 #endif
 846
 847         return 0;
 848 }
 849
 850 static int kb_base_verify(struct fio_option *o, void *data)
 851 {
 852         struct thread_data *td = data;
 853
 854         if (td->o.kb_base != 1024 && td->o.kb_base != 1000) {
 855                 log_err("fio: kb_base set to nonsensical value: %u\n",
 856                                 td->o.kb_base);
 857                 return 1;
 858         }
 859
 860         return 0;
 861 }
 862
 863 /*
 864  * Map of job/command line options
 865  */
 866 static struct fio_option options[FIO_MAX_OPTS] = {
 867         {
 868                 .name   = "description",
 869                 .type   = FIO_OPT_STR_STORE,
 870                 .off1   = td_var_offset(description),
 871                 .help   = "Text job description",
 872         },
 873         {
 874                 .name   = "name",
 875                 .type   = FIO_OPT_STR_STORE,
 876                 .off1   = td_var_offset(name),
 877                 .help   = "Name of this job",
 878         },
 879         {
 880                 .name   = "directory",
 881                 .type   = FIO_OPT_STR_STORE,
 882                 .off1   = td_var_offset(directory),
 883                 .cb     = str_directory_cb,
 884                 .help   = "Directory to store files in",
 885         },
 886         {
 887                 .name   = "filename",
 888                 .type   = FIO_OPT_STR_STORE,
 889                 .off1   = td_var_offset(filename),
 890                 .cb     = str_filename_cb,
 891                 .prio   = -1, /* must come after "directory" */
 892                 .help   = "File(s) to use for the workload",
 893         },
 894         {
 895                 .name   = "kb_base",
 896                 .type   = FIO_OPT_INT,
 897                 .off1   = td_var_offset(kb_base),
 898                 .verify = kb_base_verify,
 899                 .prio   = 1,
 900                 .def    = "1024",
 901                 .help   = "How many bytes per KB for reporting (1000 or 1024)",
 902         },
 903         {
 904                 .name   = "lockfile",
 905                 .type   = FIO_OPT_STR,
 906                 .cb     = str_lockfile_cb,
 907                 .off1   = td_var_offset(file_lock_mode),
 908                 .help   = "Lock file when doing IO to it",
 909                 .parent = "filename",
 910                 .def    = "none",
 911                 .posval = {
 912                           { .ival = "none",
 913                             .oval = FILE_LOCK_NONE,
 914                             .help = "No file locking",
 915                           },
 916                           { .ival = "exclusive",
 917                             .oval = FILE_LOCK_EXCLUSIVE,
 918                             .help = "Exclusive file lock",
 919                           },
 920                           {
 921                             .ival = "readwrite",
 922                             .oval = FILE_LOCK_READWRITE,
 923                             .help = "Read vs write lock",
 924                           },
 925                 },
 926         },
 927         {
 928                 .name   = "opendir",
 929                 .type   = FIO_OPT_STR_STORE,
 930                 .off1   = td_var_offset(opendir),
 931                 .cb     = str_opendir_cb,
 932                 .help   = "Recursively add files from this directory and down",
 933         },
 934         {
 935                 .name   = "rw",
 936                 .alias  = "readwrite",
 937                 .type   = FIO_OPT_STR,
 938                 .cb     = str_rw_cb,
 939                 .off1   = td_var_offset(td_ddir),
 940                 .help   = "IO direction",
 941                 .def    = "read",
 942                 .verify = rw_verify,
 943                 .posval = {
 944                           { .ival = "read",
 945                             .oval = TD_DDIR_READ,
 946                             .help = "Sequential read",
 947                           },
 948                           { .ival = "write",
 949                             .oval = TD_DDIR_WRITE,
 950                             .help = "Sequential write",
 951                           },
 952                           { .ival = "trim",
 953                             .oval = TD_DDIR_TRIM,
 954                             .help = "Sequential trim",
 955                           },
 956                           { .ival = "randread",
 957                             .oval = TD_DDIR_RANDREAD,
 958                             .help = "Random read",
 959                           },
 960                           { .ival = "randwrite",
 961                             .oval = TD_DDIR_RANDWRITE,
 962                             .help = "Random write",
 963                           },
 964                           { .ival = "randtrim",
 965                             .oval = TD_DDIR_RANDTRIM,
 966                             .help = "Random trim",
 967                           },
 968                           { .ival = "rw",
 969                             .oval = TD_DDIR_RW,
 970                             .help = "Sequential read and write mix",
 971                           },
 972                           { .ival = "readwrite",
 973                             .oval = TD_DDIR_RW,
 974                             .help = "Sequential read and write mix",
 975                           },
 976                           { .ival = "randrw",
 977                             .oval = TD_DDIR_RANDRW,
 978                             .help = "Random read and write mix"
 979                           },
 980                 },
 981         },
 982         {
 983                 .name   = "rw_sequencer",
 984                 .type   = FIO_OPT_STR,
 985                 .off1   = td_var_offset(rw_seq),
 986                 .help   = "IO offset generator modifier",
 987                 .def    = "sequential",
 988                 .posval = {
 989                           { .ival = "sequential",
 990                             .oval = RW_SEQ_SEQ,
 991                             .help = "Generate sequential offsets",
 992                           },
 993                           { .ival = "identical",
 994                             .oval = RW_SEQ_IDENT,
 995                             .help = "Generate identical offsets",
 996                           },
 997                 },
 998         },
 999
1000         {
1001                 .name   = "ioengine",
1002                 .type   = FIO_OPT_STR_STORE,
1003                 .off1   = td_var_offset(ioengine),
1004                 .help   = "IO engine to use",
1005                 .def    = FIO_PREFERRED_ENGINE,
1006                 .posval = {
1007                           { .ival = "sync",
1008                             .help = "Use read/write",
1009                           },
1010                           { .ival = "psync",
1011                             .help = "Use pread/pwrite",
1012                           },
1013                           { .ival = "vsync",
1014                             .help = "Use readv/writev",
1015                           },
1016 #ifdef FIO_HAVE_LIBAIO
1017                           { .ival = "libaio",
1018                             .help = "Linux native asynchronous IO",
1019                           },
1020 #endif
1021 #ifdef FIO_HAVE_POSIXAIO
1022                           { .ival = "posixaio",
1023                             .help = "POSIX asynchronous IO",
1024                           },
1025 #endif
1026 #ifdef FIO_HAVE_SOLARISAIO
1027                           { .ival = "solarisaio",
1028                             .help = "Solaris native asynchronous IO",
1029                           },
1030 #endif
1031 #ifdef FIO_HAVE_WINDOWSAIO
1032                           { .ival = "windowsaio",
1033                             .help = "Windows native asynchronous IO"
1034                           },
1035 #endif
1036                           { .ival = "mmap",
1037                             .help = "Memory mapped IO"
1038                           },
1039 #ifdef FIO_HAVE_SPLICE
1040                           { .ival = "splice",
1041                             .help = "splice/vmsplice based IO",
1042                           },
1043                           { .ival = "netsplice",
1044                             .help = "splice/vmsplice to/from the network",
1045                           },
1046 #endif
1047 #ifdef FIO_HAVE_SGIO
1048                           { .ival = "sg",
1049                             .help = "SCSI generic v3 IO",
1050                           },
1051 #endif
1052                           { .ival = "null",
1053                             .help = "Testing engine (no data transfer)",
1054                           },
1055                           { .ival = "net",
1056                             .help = "Network IO",
1057                           },
1058 #ifdef FIO_HAVE_SYSLET
1059                           { .ival = "syslet-rw",
1060                             .help = "syslet enabled async pread/pwrite IO",
1061                           },
1062 #endif
1063                           { .ival = "cpuio",
1064                             .help = "CPU cycle burner engine",
1065                           },
1066 #ifdef FIO_HAVE_GUASI
1067                           { .ival = "guasi",
1068                             .help = "GUASI IO engine",
1069                           },
1070 #endif
1071 #ifdef FIO_HAVE_BINJECT
1072                           { .ival = "binject",
1073                             .help = "binject direct inject block engine",
1074                           },
1075 #endif
1076 #ifdef FIO_HAVE_RDMA
1077                           { .ival = "rdma",
1078                             .help = "RDMA IO engine",
1079                           },
1080 #endif
1081 #ifdef FIO_HAVE_FUSION_AW
1082                           { .ival = "fusion-aw-sync",
1083                             .help = "Fusion-io atomic write engine",
1084                           },
1085 #endif
1086                           { .ival = "external",
1087                             .help = "Load external engine (append name)",
1088                           },
1089                 },
1090         },
1091         {
1092                 .name   = "iodepth",
1093                 .type   = FIO_OPT_INT,
1094                 .off1   = td_var_offset(iodepth),
1095                 .help   = "Number of IO buffers to keep in flight",
1096                 .minval = 1,
1097                 .def    = "1",
1098         },
1099         {
1100                 .name   = "iodepth_batch",
1101                 .alias  = "iodepth_batch_submit",
1102                 .type   = FIO_OPT_INT,
1103                 .off1   = td_var_offset(iodepth_batch),
1104                 .help   = "Number of IO buffers to submit in one go",
1105                 .parent = "iodepth",
1106                 .minval = 1,
1107                 .def    = "1",
1108         },
1109         {
1110                 .name   = "iodepth_batch_complete",
1111                 .type   = FIO_OPT_INT,
1112                 .off1   = td_var_offset(iodepth_batch_complete),
1113                 .help   = "Number of IO buffers to retrieve in one go",
1114                 .parent = "iodepth",
1115                 .minval = 0,
1116                 .def    = "1",
1117         },
1118         {
1119                 .name   = "iodepth_low",
1120                 .type   = FIO_OPT_INT,
1121                 .off1   = td_var_offset(iodepth_low),
1122                 .help   = "Low water mark for queuing depth",
1123                 .parent = "iodepth",
1124         },
1125         {
1126                 .name   = "size",
1127                 .type   = FIO_OPT_STR_VAL,
1128                 .cb     = str_size_cb,
1129                 .help   = "Total size of device or files",
1130         },
1131         {
1132                 .name   = "fill_device",
1133                 .alias  = "fill_fs",
1134                 .type   = FIO_OPT_BOOL,
1135                 .off1   = td_var_offset(fill_device),
1136                 .help   = "Write until an ENOSPC error occurs",
1137                 .def    = "0",
1138         },
1139         {
1140                 .name   = "filesize",
1141                 .type   = FIO_OPT_STR_VAL,
1142                 .off1   = td_var_offset(file_size_low),
1143                 .off2   = td_var_offset(file_size_high),
1144                 .minval = 1,
1145                 .help   = "Size of individual files",
1146         },
1147         {
1148                 .name   = "offset",
1149                 .alias  = "fileoffset",
1150                 .type   = FIO_OPT_STR_VAL,
1151                 .off1   = td_var_offset(start_offset),
1152                 .help   = "Start IO from this offset",
1153                 .def    = "0",
1154         },
1155         {
1156                 .name   = "offset_increment",
1157                 .type   = FIO_OPT_STR_VAL,
1158                 .off1   = td_var_offset(offset_increment),
1159                 .help   = "What is the increment from one offset to the next",
1160                 .parent = "offset",
1161                 .def    = "0",
1162         },
1163         {
1164                 .name   = "bs",
1165                 .alias  = "blocksize",
1166                 .type   = FIO_OPT_INT,
1167                 .off1   = td_var_offset(bs[DDIR_READ]),
1168                 .off2   = td_var_offset(bs[DDIR_WRITE]),
1169                 .off3   = td_var_offset(bs[DDIR_TRIM]),
1170                 .minval = 1,
1171                 .help   = "Block size unit",
1172                 .def    = "4k",
1173                 .parent = "rw",
1174         },
1175         {
1176                 .name   = "ba",
1177                 .alias  = "blockalign",
1178                 .type   = FIO_OPT_INT,
1179                 .off1   = td_var_offset(ba[DDIR_READ]),
1180                 .off2   = td_var_offset(ba[DDIR_WRITE]),
1181                 .off3   = td_var_offset(ba[DDIR_TRIM]),
1182                 .minval = 1,
1183                 .help   = "IO block offset alignment",
1184                 .parent = "rw",
1185         },
1186         {
1187                 .name   = "bsrange",
1188                 .alias  = "blocksize_range",
1189                 .type   = FIO_OPT_RANGE,
1190                 .off1   = td_var_offset(min_bs[DDIR_READ]),
1191                 .off2   = td_var_offset(max_bs[DDIR_READ]),
1192                 .off3   = td_var_offset(min_bs[DDIR_WRITE]),
1193                 .off4   = td_var_offset(max_bs[DDIR_WRITE]),
1194                 .off5   = td_var_offset(min_bs[DDIR_TRIM]),
1195                 .off6   = td_var_offset(max_bs[DDIR_TRIM]),
1196                 .minval = 1,
1197                 .help   = "Set block size range (in more detail than bs)",
1198                 .parent = "rw",
1199         },
1200         {
1201                 .name   = "bssplit",
1202                 .type   = FIO_OPT_STR,
1203                 .cb     = str_bssplit_cb,
1204                 .help   = "Set a specific mix of block sizes",
1205                 .parent = "rw",
1206         },
1207         {
1208                 .name   = "bs_unaligned",
1209                 .alias  = "blocksize_unaligned",
1210                 .type   = FIO_OPT_STR_SET,
1211                 .off1   = td_var_offset(bs_unaligned),
1212                 .help   = "Don't sector align IO buffer sizes",
1213                 .parent = "rw",
1214         },
1215         {
1216                 .name   = "randrepeat",
1217                 .type   = FIO_OPT_BOOL,
1218                 .off1   = td_var_offset(rand_repeatable),
1219                 .help   = "Use repeatable random IO pattern",
1220                 .def    = "1",
1221                 .parent = "rw",
1222         },
1223         {
1224                 .name   = "use_os_rand",
1225                 .type   = FIO_OPT_BOOL,
1226                 .off1   = td_var_offset(use_os_rand),
1227                 .help   = "Set to use OS random generator",
1228                 .def    = "0",
1229                 .parent = "rw",
1230         },
1231         {
1232                 .name   = "norandommap",
1233                 .type   = FIO_OPT_STR_SET,
1234                 .off1   = td_var_offset(norandommap),
1235                 .help   = "Accept potential duplicate random blocks",
1236                 .parent = "rw",
1237         },
1238         {
1239                 .name   = "softrandommap",
1240                 .type   = FIO_OPT_BOOL,
1241                 .off1   = td_var_offset(softrandommap),
1242                 .help   = "Set norandommap if randommap allocation fails",
1243                 .parent = "norandommap",
1244                 .def    = "0",
1245         },
1246         {
1247                 .name   = "nrfiles",
1248                 .alias  = "nr_files",
1249                 .type   = FIO_OPT_INT,
1250                 .off1   = td_var_offset(nr_files),
1251                 .help   = "Split job workload between this number of files",
1252                 .def    = "1",
1253         },
1254         {
1255                 .name   = "openfiles",
1256                 .type   = FIO_OPT_INT,
1257                 .off1   = td_var_offset(open_files),
1258                 .help   = "Number of files to keep open at the same time",
1259         },
1260         {
1261                 .name   = "file_service_type",
1262                 .type   = FIO_OPT_STR,
1263                 .cb     = str_fst_cb,
1264                 .off1   = td_var_offset(file_service_type),
1265                 .help   = "How to select which file to service next",
1266                 .def    = "roundrobin",
1267                 .posval = {
1268                           { .ival = "random",
1269                             .oval = FIO_FSERVICE_RANDOM,
1270                             .help = "Choose a file at random",
1271                           },
1272                           { .ival = "roundrobin",
1273                             .oval = FIO_FSERVICE_RR,
1274                             .help = "Round robin select files",
1275                           },
1276                           { .ival = "sequential",
1277                             .oval = FIO_FSERVICE_SEQ,
1278                             .help = "Finish one file before moving to the next",
1279                           },
1280                 },
1281                 .parent = "nrfiles",
1282         },
1283 #ifdef FIO_HAVE_FALLOCATE
1284         {
1285                 .name   = "fallocate",
1286                 .type   = FIO_OPT_STR,
1287                 .off1   = td_var_offset(fallocate_mode),
1288                 .help   = "Whether pre-allocation is performed when laying out files",
1289                 .def    = "posix",
1290                 .posval = {
1291                           { .ival = "none",
1292                             .oval = FIO_FALLOCATE_NONE,
1293                             .help = "Do not pre-allocate space",
1294                           },
1295                           { .ival = "posix",
1296                             .oval = FIO_FALLOCATE_POSIX,
1297                             .help = "Use posix_fallocate()",
1298                           },
1299 #ifdef FIO_HAVE_LINUX_FALLOCATE
1300                           { .ival = "keep",
1301                             .oval = FIO_FALLOCATE_KEEP_SIZE,
1302                             .help = "Use fallocate(..., FALLOC_FL_KEEP_SIZE, ...)",
1303                           },
1304 #endif
1305                           /* Compatibility with former boolean values */
1306                           { .ival = "0",
1307                             .oval = FIO_FALLOCATE_NONE,
1308                             .help = "Alias for 'none'",
1309                           },
1310                           { .ival = "1",
1311                             .oval = FIO_FALLOCATE_POSIX,
1312                             .help = "Alias for 'posix'",
1313                           },
1314                 },
1315         },
1316 #endif  /* FIO_HAVE_FALLOCATE */
1317         {
1318                 .name   = "fadvise_hint",
1319                 .type   = FIO_OPT_BOOL,
1320                 .off1   = td_var_offset(fadvise_hint),
1321                 .help   = "Use fadvise() to advise the kernel on IO pattern",
1322                 .def    = "1",
1323         },
1324         {
1325                 .name   = "fsync",
1326                 .type   = FIO_OPT_INT,
1327                 .off1   = td_var_offset(fsync_blocks),
1328                 .help   = "Issue fsync for writes every given number of blocks",
1329                 .def    = "0",
1330         },
1331         {
1332                 .name   = "fdatasync",
1333                 .type   = FIO_OPT_INT,
1334                 .off1   = td_var_offset(fdatasync_blocks),
1335                 .help   = "Issue fdatasync for writes every given number of blocks",
1336                 .def    = "0",
1337         },
1338         {
1339                 .name   = "write_barrier",
1340                 .type   = FIO_OPT_INT,
1341                 .off1   = td_var_offset(barrier_blocks),
1342                 .help   = "Make every Nth write a barrier write",
1343                 .def    = "0",
1344         },
1345 #ifdef FIO_HAVE_SYNC_FILE_RANGE
1346         {
1347                 .name   = "sync_file_range",
1348                 .posval = {
1349                           { .ival = "wait_before",
1350                             .oval = SYNC_FILE_RANGE_WAIT_BEFORE,
1351                             .help = "SYNC_FILE_RANGE_WAIT_BEFORE",
1352                             .or   = 1,
1353                           },
1354                           { .ival = "write",
1355                             .oval = SYNC_FILE_RANGE_WRITE,
1356                             .help = "SYNC_FILE_RANGE_WRITE",
1357                             .or   = 1,
1358                           },
1359                           {
1360                             .ival = "wait_after",
1361                             .oval = SYNC_FILE_RANGE_WAIT_AFTER,
1362                             .help = "SYNC_FILE_RANGE_WAIT_AFTER",
1363                             .or   = 1,
1364                           },
1365                 },
1366                 .type   = FIO_OPT_STR_MULTI,
1367                 .cb     = str_sfr_cb,
1368                 .off1   = td_var_offset(sync_file_range),
1369                 .help   = "Use sync_file_range()",
1370         },
1371 #endif
1372         {
1373                 .name   = "direct",
1374                 .type   = FIO_OPT_BOOL,
1375                 .off1   = td_var_offset(odirect),
1376                 .help   = "Use O_DIRECT IO (negates buffered)",
1377                 .def    = "0",
1378         },
1379         {
1380                 .name   = "buffered",
1381                 .type   = FIO_OPT_BOOL,
1382                 .off1   = td_var_offset(odirect),
1383                 .neg    = 1,
1384                 .help   = "Use buffered IO (negates direct)",
1385                 .def    = "1",
1386         },
1387         {
1388                 .name   = "overwrite",
1389                 .type   = FIO_OPT_BOOL,
1390                 .off1   = td_var_offset(overwrite),
1391                 .help   = "When writing, set whether to overwrite current data",
1392                 .def    = "0",
1393         },
1394         {
1395                 .name   = "loops",
1396                 .type   = FIO_OPT_INT,
1397                 .off1   = td_var_offset(loops),
1398                 .help   = "Number of times to run the job",
1399                 .def    = "1",
1400         },
1401         {
1402                 .name   = "numjobs",
1403                 .type   = FIO_OPT_INT,
1404                 .off1   = td_var_offset(numjobs),
1405                 .help   = "Duplicate this job this many times",
1406                 .def    = "1",
1407         },
1408         {
1409                 .name   = "startdelay",
1410                 .type   = FIO_OPT_STR_VAL_TIME,
1411                 .off1   = td_var_offset(start_delay),
1412                 .help   = "Only start job when this period has passed",
1413                 .def    = "0",
1414         },
1415         {
1416                 .name   = "runtime",
1417                 .alias  = "timeout",
1418                 .type   = FIO_OPT_STR_VAL_TIME,
1419                 .off1   = td_var_offset(timeout),
1420                 .help   = "Stop workload when this amount of time has passed",
1421                 .def    = "0",
1422         },
1423         {
1424                 .name   = "time_based",
1425                 .type   = FIO_OPT_STR_SET,
1426                 .off1   = td_var_offset(time_based),
1427                 .help   = "Keep running until runtime/timeout is met",
1428         },
1429         {
1430                 .name   = "ramp_time",
1431                 .type   = FIO_OPT_STR_VAL_TIME,
1432                 .off1   = td_var_offset(ramp_time),
1433                 .help   = "Ramp up time before measuring performance",
1434         },
1435         {
1436                 .name   = "clocksource",
1437                 .type   = FIO_OPT_STR,
1438                 .cb     = fio_clock_source_cb,
1439                 .off1   = td_var_offset(clocksource),
1440                 .help   = "What type of timing source to use",
1441                 .posval = {
1442                           { .ival = "gettimeofday",
1443                             .oval = CS_GTOD,
1444                             .help = "Use gettimeofday(2) for timing",
1445                           },
1446                           { .ival = "clock_gettime",
1447                             .oval = CS_CGETTIME,
1448                             .help = "Use clock_gettime(2) for timing",
1449                           },
1450 #ifdef ARCH_HAVE_CPU_CLOCK
1451                           { .ival = "cpu",
1452                             .oval = CS_CPUCLOCK,
1453                             .help = "Use CPU private clock",
1454                           },
1455 #endif
1456                 },
1457         },
1458         {
1459                 .name   = "mem",
1460                 .alias  = "iomem",
1461                 .type   = FIO_OPT_STR,
1462                 .cb     = str_mem_cb,
1463                 .off1   = td_var_offset(mem_type),
1464                 .help   = "Backing type for IO buffers",
1465                 .def    = "malloc",
1466                 .posval = {
1467                           { .ival = "malloc",
1468                             .oval = MEM_MALLOC,
1469                             .help = "Use malloc(3) for IO buffers",
1470                           },
1471                           { .ival = "shm",
1472                             .oval = MEM_SHM,
1473                             .help = "Use shared memory segments for IO buffers",
1474                           },
1475 #ifdef FIO_HAVE_HUGETLB
1476                           { .ival = "shmhuge",
1477                             .oval = MEM_SHMHUGE,
1478                             .help = "Like shm, but use huge pages",
1479                           },
1480 #endif
1481                           { .ival = "mmap",
1482                             .oval = MEM_MMAP,
1483                             .help = "Use mmap(2) (file or anon) for IO buffers",
1484                           },
1485 #ifdef FIO_HAVE_HUGETLB
1486                           { .ival = "mmaphuge",
1487                             .oval = MEM_MMAPHUGE,
1488                             .help = "Like mmap, but use huge pages",
1489                           },
1490 #endif
1491                   },
1492         },
1493         {
1494                 .name   = "iomem_align",
1495                 .alias  = "mem_align",
1496                 .type   = FIO_OPT_INT,
1497                 .off1   = td_var_offset(mem_align),
1498                 .minval = 0,
1499                 .help   = "IO memory buffer offset alignment",
1500                 .def    = "0",
1501                 .parent = "iomem",
1502         },
1503         {
1504                 .name   = "verify",
1505                 .type   = FIO_OPT_STR,
1506                 .off1   = td_var_offset(verify),
1507                 .help   = "Verify data written",
1508                 .cb     = str_verify_cb,
1509                 .def    = "0",
1510                 .posval = {
1511                           { .ival = "0",
1512                             .oval = VERIFY_NONE,
1513                             .help = "Don't do IO verification",
1514                           },
1515                           { .ival = "md5",
1516                             .oval = VERIFY_MD5,
1517                             .help = "Use md5 checksums for verification",
1518                           },
1519                           { .ival = "crc64",
1520                             .oval = VERIFY_CRC64,
1521                             .help = "Use crc64 checksums for verification",
1522                           },
1523                           { .ival = "crc32",
1524                             .oval = VERIFY_CRC32,
1525                             .help = "Use crc32 checksums for verification",
1526                           },
1527                           { .ival = "crc32c-intel",
1528                             .oval = VERIFY_CRC32C,
1529                             .help = "Use crc32c checksums for verification (hw assisted, if available)",
1530                           },
1531                           { .ival = "crc32c",
1532                             .oval = VERIFY_CRC32C,
1533                             .help = "Use crc32c checksums for verification (hw assisted, if available)",
1534                           },
1535                           { .ival = "crc16",
1536                             .oval = VERIFY_CRC16,
1537                             .help = "Use crc16 checksums for verification",
1538                           },
1539                           { .ival = "crc7",
1540                             .oval = VERIFY_CRC7,
1541                             .help = "Use crc7 checksums for verification",
1542                           },
1543                           { .ival = "sha1",
1544                             .oval = VERIFY_SHA1,
1545                             .help = "Use sha1 checksums for verification",
1546                           },
1547                           { .ival = "sha256",
1548                             .oval = VERIFY_SHA256,
1549                             .help = "Use sha256 checksums for verification",
1550                           },
1551                           { .ival = "sha512",
1552                             .oval = VERIFY_SHA512,
1553                             .help = "Use sha512 checksums for verification",
1554                           },
1555                           { .ival = "meta",
1556                             .oval = VERIFY_META,
1557                             .help = "Use io information",
1558                           },
1559                           {
1560                             .ival = "null",
1561                             .oval = VERIFY_NULL,
1562                             .help = "Pretend to verify",
1563                           },
1564                 },
1565         },
1566         {
1567                 .name   = "do_verify",
1568                 .type   = FIO_OPT_BOOL,
1569                 .off1   = td_var_offset(do_verify),
1570                 .help   = "Run verification stage after write",
1571                 .def    = "1",
1572                 .parent = "verify",
1573         },
1574         {
1575                 .name   = "verifysort",
1576                 .type   = FIO_OPT_BOOL,
1577                 .off1   = td_var_offset(verifysort),
1578                 .help   = "Sort written verify blocks for read back",
1579                 .def    = "1",
1580                 .parent = "verify",
1581         },
1582         {
1583                 .name   = "verify_interval",
1584                 .type   = FIO_OPT_INT,
1585                 .off1   = td_var_offset(verify_interval),
1586                 .minval = 2 * sizeof(struct verify_header),
1587                 .help   = "Store verify buffer header every N bytes",
1588                 .parent = "verify",
1589         },
1590         {
1591                 .name   = "verify_offset",
1592                 .type   = FIO_OPT_INT,
1593                 .help   = "Offset verify header location by N bytes",
1594                 .def    = "0",
1595                 .cb     = str_verify_offset_cb,
1596                 .parent = "verify",
1597         },
1598         {
1599                 .name   = "verify_pattern",
1600                 .type   = FIO_OPT_STR,
1601                 .cb     = str_verify_pattern_cb,
1602                 .help   = "Fill pattern for IO buffers",
1603                 .parent = "verify",
1604         },
1605         {
1606                 .name   = "verify_fatal",
1607                 .type   = FIO_OPT_BOOL,
1608                 .off1   = td_var_offset(verify_fatal),
1609                 .def    = "0",
1610                 .help   = "Exit on a single verify failure, don't continue",
1611                 .parent = "verify",
1612         },
1613         {
1614                 .name   = "verify_dump",
1615                 .type   = FIO_OPT_BOOL,
1616                 .off1   = td_var_offset(verify_dump),
1617                 .def    = "0",
1618                 .help   = "Dump contents of good and bad blocks on failure",
1619                 .parent = "verify",
1620         },
1621         {
1622                 .name   = "verify_async",
1623                 .type   = FIO_OPT_INT,
1624                 .off1   = td_var_offset(verify_async),
1625                 .def    = "0",
1626                 .help   = "Number of async verifier threads to use",
1627                 .parent = "verify",
1628         },
1629         {
1630                 .name   = "verify_backlog",
1631                 .type   = FIO_OPT_STR_VAL,
1632                 .off1   = td_var_offset(verify_backlog),
1633                 .help   = "Verify after this number of blocks are written",
1634                 .parent = "verify",
1635         },
1636         {
1637                 .name   = "verify_backlog_batch",
1638                 .type   = FIO_OPT_INT,
1639                 .off1   = td_var_offset(verify_batch),
1640                 .help   = "Verify this number of IO blocks",
1641                 .parent = "verify",
1642         },
1643 #ifdef FIO_HAVE_CPU_AFFINITY
1644         {
1645                 .name   = "verify_async_cpus",
1646                 .type   = FIO_OPT_STR,
1647                 .cb     = str_verify_cpus_allowed_cb,
1648                 .help   = "Set CPUs allowed for async verify threads",
1649                 .parent = "verify_async",
1650         },
1651 #endif
1652 #ifdef FIO_HAVE_TRIM
1653         {
1654                 .name   = "trim_percentage",
1655                 .type   = FIO_OPT_INT,
1656                 .cb     = str_verify_trim_cb,
1657                 .maxval = 100,
1658                 .help   = "Number of verify blocks to discard/trim",
1659                 .parent = "verify",
1660                 .def    = "0",
1661         },
1662         {
1663                 .name   = "trim_verify_zero",
1664                 .type   = FIO_OPT_INT,
1665                 .help   = "Verify that trim/discarded blocks are returned as zeroes",
1666                 .off1   = td_var_offset(trim_zero),
1667                 .parent = "trim_percentage",
1668                 .def    = "1",
1669         },
1670         {
1671                 .name   = "trim_backlog",
1672                 .type   = FIO_OPT_STR_VAL,
1673                 .off1   = td_var_offset(trim_backlog),
1674                 .help   = "Trim after this number of blocks are written",
1675                 .parent = "trim_percentage",
1676         },
1677         {
1678                 .name   = "trim_backlog_batch",
1679                 .type   = FIO_OPT_INT,
1680                 .off1   = td_var_offset(trim_batch),
1681                 .help   = "Trim this number of IO blocks",
1682                 .parent = "trim_percentage",
1683         },
1684 #endif
1685         {
1686                 .name   = "write_iolog",
1687                 .type   = FIO_OPT_STR_STORE,
1688                 .off1   = td_var_offset(write_iolog_file),
1689                 .help   = "Store IO pattern to file",
1690         },
1691         {
1692                 .name   = "read_iolog",
1693                 .type   = FIO_OPT_STR_STORE,
1694                 .off1   = td_var_offset(read_iolog_file),
1695                 .help   = "Playback IO pattern from file",
1696         },
1697         {
1698                 .name   = "replay_no_stall",
1699                 .type   = FIO_OPT_INT,
1700                 .off1   = td_var_offset(no_stall),
1701                 .def    = "0",
1702                 .parent = "read_iolog",
1703                 .help   = "Playback IO pattern file as fast as possible without stalls",
1704         },
1705         {
1706                 .name   = "replay_redirect",
1707                 .type   = FIO_OPT_STR_STORE,
1708                 .off1   = td_var_offset(replay_redirect),
1709                 .parent = "read_iolog",
1710                 .help   = "Replay all I/O onto this device, regardless of trace device",
1711         },
1712         {
1713                 .name   = "exec_prerun",
1714                 .type   = FIO_OPT_STR_STORE,
1715                 .off1   = td_var_offset(exec_prerun),
1716                 .help   = "Execute this file prior to running job",
1717         },
1718         {
1719                 .name   = "exec_postrun",
1720                 .type   = FIO_OPT_STR_STORE,
1721                 .off1   = td_var_offset(exec_postrun),
1722                 .help   = "Execute this file after running job",
1723         },
1724 #ifdef FIO_HAVE_IOSCHED_SWITCH
1725         {
1726                 .name   = "ioscheduler",
1727                 .type   = FIO_OPT_STR_STORE,
1728                 .off1   = td_var_offset(ioscheduler),
1729                 .help   = "Use this IO scheduler on the backing device",
1730         },
1731 #endif
1732         {
1733                 .name   = "zonesize",
1734                 .type   = FIO_OPT_STR_VAL,
1735                 .off1   = td_var_offset(zone_size),
1736                 .help   = "Amount of data to read per zone",
1737                 .def    = "0",
1738         },
1739         {
1740                 .name   = "zonerange",
1741                 .type   = FIO_OPT_STR_VAL,
1742                 .off1   = td_var_offset(zone_range),
1743                 .help   = "Give size of an IO zone",
1744                 .def    = "0",
1745         },
1746         {
1747                 .name   = "zoneskip",
1748                 .type   = FIO_OPT_STR_VAL,
1749                 .off1   = td_var_offset(zone_skip),
1750                 .help   = "Space between IO zones",
1751                 .def    = "0",
1752         },
1753         {
1754                 .name   = "lockmem",
1755                 .type   = FIO_OPT_STR_VAL,
1756                 .cb     = str_lockmem_cb,
1757                 .help   = "Lock down this amount of memory",
1758                 .def    = "0",
1759         },
1760         {
1761                 .name   = "rwmixread",
1762                 .type   = FIO_OPT_INT,
1763                 .cb     = str_rwmix_read_cb,
1764                 .maxval = 100,
1765                 .help   = "Percentage of mixed workload that is reads",
1766                 .def    = "50",
1767         },
1768         {
1769                 .name   = "rwmixwrite",
1770                 .type   = FIO_OPT_INT,
1771                 .cb     = str_rwmix_write_cb,
1772                 .maxval = 100,
1773                 .help   = "Percentage of mixed workload that is writes",
1774                 .def    = "50",
1775         },
1776         {
1777                 .name   = "rwmixcycle",
1778                 .type   = FIO_OPT_DEPRECATED,
1779         },
1780         {
1781                 .name   = "nice",
1782                 .type   = FIO_OPT_INT,
1783                 .off1   = td_var_offset(nice),
1784                 .help   = "Set job CPU nice value",
1785                 .minval = -19,
1786                 .maxval = 20,
1787                 .def    = "0",
1788         },
1789 #ifdef FIO_HAVE_IOPRIO
1790         {
1791                 .name   = "prio",
1792                 .type   = FIO_OPT_INT,
1793                 .cb     = str_prio_cb,
1794                 .help   = "Set job IO priority value",
1795                 .minval = 0,
1796                 .maxval = 7,
1797         },
1798         {
1799                 .name   = "prioclass",
1800                 .type   = FIO_OPT_INT,
1801                 .cb     = str_prioclass_cb,
1802                 .help   = "Set job IO priority class",
1803                 .minval = 0,
1804                 .maxval = 3,
1805         },
1806 #endif
1807         {
1808                 .name   = "thinktime",
1809                 .type   = FIO_OPT_INT,
1810                 .off1   = td_var_offset(thinktime),
1811                 .help   = "Idle time between IO buffers (usec)",
1812                 .def    = "0",
1813         },
1814         {
1815                 .name   = "thinktime_spin",
1816                 .type   = FIO_OPT_INT,
1817                 .off1   = td_var_offset(thinktime_spin),
1818                 .help   = "Start think time by spinning this amount (usec)",
1819                 .def    = "0",
1820                 .parent = "thinktime",
1821         },
1822         {
1823                 .name   = "thinktime_blocks",
1824                 .type   = FIO_OPT_INT,
1825                 .off1   = td_var_offset(thinktime_blocks),
1826                 .help   = "IO buffer period between 'thinktime'",
1827                 .def    = "1",
1828                 .parent = "thinktime",
1829         },
1830         {
1831                 .name   = "rate",
1832                 .type   = FIO_OPT_INT,
1833                 .off1   = td_var_offset(rate[DDIR_READ]),
1834                 .off2   = td_var_offset(rate[DDIR_WRITE]),
1835                 .off3   = td_var_offset(rate[DDIR_TRIM]),
1836                 .help   = "Set bandwidth rate",
1837         },
1838         {
1839                 .name   = "ratemin",
1840                 .type   = FIO_OPT_INT,
1841                 .off1   = td_var_offset(ratemin[DDIR_READ]),
1842                 .off2   = td_var_offset(ratemin[DDIR_WRITE]),
1843                 .off3   = td_var_offset(ratemin[DDIR_TRIM]),
1844                 .help   = "Job must meet this rate or it will be shutdown",
1845                 .parent = "rate",
1846         },
1847         {
1848                 .name   = "rate_iops",
1849                 .type   = FIO_OPT_INT,
1850                 .off1   = td_var_offset(rate_iops[DDIR_READ]),
1851                 .off2   = td_var_offset(rate_iops[DDIR_WRITE]),
1852                 .off3   = td_var_offset(rate_iops[DDIR_TRIM]),
1853                 .help   = "Limit IO used to this number of IO operations/sec",
1854         },
1855         {
1856                 .name   = "rate_iops_min",
1857                 .type   = FIO_OPT_INT,
1858                 .off1   = td_var_offset(rate_iops_min[DDIR_READ]),
1859                 .off2   = td_var_offset(rate_iops_min[DDIR_WRITE]),
1860                 .off3   = td_var_offset(rate_iops_min[DDIR_TRIM]),
1861                 .help   = "Job must meet this rate or it will be shut down",
1862                 .parent = "rate_iops",
1863         },
1864         {
1865                 .name   = "ratecycle",
1866                 .type   = FIO_OPT_INT,
1867                 .off1   = td_var_offset(ratecycle),
1868                 .help   = "Window average for rate limits (msec)",
1869                 .def    = "1000",
1870                 .parent = "rate",
1871         },
1872         {
1873                 .name   = "invalidate",
1874                 .type   = FIO_OPT_BOOL,
1875                 .off1   = td_var_offset(invalidate_cache),
1876                 .help   = "Invalidate buffer/page cache prior to running job",
1877                 .def    = "1",
1878         },
1879         {
1880                 .name   = "sync",
1881                 .type   = FIO_OPT_BOOL,
1882                 .off1   = td_var_offset(sync_io),
1883                 .help   = "Use O_SYNC for buffered writes",
1884                 .def    = "0",
1885                 .parent = "buffered",
1886         },
1887         {
1888                 .name   = "bwavgtime",
1889                 .type   = FIO_OPT_INT,
1890                 .off1   = td_var_offset(bw_avg_time),
1891                 .help   = "Time window over which to calculate bandwidth"
1892                           " (msec)",
1893                 .def    = "500",
1894                 .parent = "write_bw_log",
1895         },
1896         {
1897                 .name   = "iopsavgtime",
1898                 .type   = FIO_OPT_INT,
1899                 .off1   = td_var_offset(iops_avg_time),
1900                 .help   = "Time window over which to calculate IOPS (msec)",
1901                 .def    = "500",
1902                 .parent = "write_iops_log",
1903         },
1904         {
1905                 .name   = "create_serialize",
1906                 .type   = FIO_OPT_BOOL,
1907                 .off1   = td_var_offset(create_serialize),
1908                 .help   = "Serialize creating of job files",
1909                 .def    = "1",
1910         },
1911         {
1912                 .name   = "create_fsync",
1913                 .type   = FIO_OPT_BOOL,
1914                 .off1   = td_var_offset(create_fsync),
1915                 .help   = "fsync file after creation",
1916                 .def    = "1",
1917         },
1918         {
1919                 .name   = "create_on_open",
1920                 .type   = FIO_OPT_BOOL,
1921                 .off1   = td_var_offset(create_on_open),
1922                 .help   = "Create files when they are opened for IO",
1923                 .def    = "0",
1924         },
1925         {
1926                 .name   = "create_only",
1927                 .type   = FIO_OPT_BOOL,
1928                 .off1   = td_var_offset(create_only),
1929                 .help   = "Only perform file creation phase",
1930                 .def    = "0",
1931         },
1932         {
1933                 .name   = "pre_read",
1934                 .type   = FIO_OPT_BOOL,
1935                 .off1   = td_var_offset(pre_read),
1936                 .help   = "Pre-read files before starting official testing",
1937                 .def    = "0",
1938         },
1939         {
1940                 .name   = "cpuload",
1941                 .type   = FIO_OPT_INT,
1942                 .off1   = td_var_offset(cpuload),
1943                 .help   = "Use this percentage of CPU",
1944         },
1945         {
1946                 .name   = "cpuchunks",
1947                 .type   = FIO_OPT_INT,
1948                 .off1   = td_var_offset(cpucycle),
1949                 .help   = "Length of the CPU burn cycles (usecs)",
1950                 .def    = "50000",
1951                 .parent = "cpuload",
1952         },
1953 #ifdef FIO_HAVE_CPU_AFFINITY
1954         {
1955                 .name   = "cpumask",
1956                 .type   = FIO_OPT_INT,
1957                 .cb     = str_cpumask_cb,
1958                 .help   = "CPU affinity mask",
1959         },
1960         {
1961                 .name   = "cpus_allowed",
1962                 .type   = FIO_OPT_STR,
1963                 .cb     = str_cpus_allowed_cb,
1964                 .help   = "Set CPUs allowed",
1965         },
1966 #endif
1967         {
1968                 .name   = "end_fsync",
1969                 .type   = FIO_OPT_BOOL,
1970                 .off1   = td_var_offset(end_fsync),
1971                 .help   = "Include fsync at the end of job",
1972                 .def    = "0",
1973         },
1974         {
1975                 .name   = "fsync_on_close",
1976                 .type   = FIO_OPT_BOOL,
1977                 .off1   = td_var_offset(fsync_on_close),
1978                 .help   = "fsync files on close",
1979                 .def    = "0",
1980         },
1981         {
1982                 .name   = "unlink",
1983                 .type   = FIO_OPT_BOOL,
1984                 .off1   = td_var_offset(unlink),
1985                 .help   = "Unlink created files after job has completed",
1986                 .def    = "0",
1987         },
1988         {
1989                 .name   = "exitall",
1990                 .type   = FIO_OPT_STR_SET,
1991                 .cb     = str_exitall_cb,
1992                 .help   = "Terminate all jobs when one exits",
1993         },
1994         {
1995                 .name   = "stonewall",
1996                 .alias  = "wait_for_previous",
1997                 .type   = FIO_OPT_STR_SET,
1998                 .off1   = td_var_offset(stonewall),
1999                 .help   = "Insert a hard barrier between this job and previous",
2000         },
2001         {
2002                 .name   = "new_group",
2003                 .type   = FIO_OPT_STR_SET,
2004                 .off1   = td_var_offset(new_group),
2005                 .help   = "Mark the start of a new group (for reporting)",
2006         },
2007         {
2008                 .name   = "thread",
2009                 .type   = FIO_OPT_STR_SET,
2010                 .off1   = td_var_offset(use_thread),
2011                 .help   = "Use threads instead of forks",
2012         },
2013         {
2014                 .name   = "write_bw_log",
2015                 .type   = FIO_OPT_STR,
2016                 .off1   = td_var_offset(write_bw_log),
2017                 .cb     = str_write_bw_log_cb,
2018                 .help   = "Write log of bandwidth during run",
2019         },
2020         {
2021                 .name   = "write_lat_log",
2022                 .type   = FIO_OPT_STR,
2023                 .off1   = td_var_offset(write_lat_log),
2024                 .cb     = str_write_lat_log_cb,
2025                 .help   = "Write log of latency during run",
2026         },
2027         {
2028                 .name   = "write_iops_log",
2029                 .type   = FIO_OPT_STR,
2030                 .off1   = td_var_offset(write_iops_log),
2031                 .cb     = str_write_iops_log_cb,
2032                 .help   = "Write log of IOPS during run",
2033         },
2034         {
2035                 .name   = "log_avg_msec",
2036                 .type   = FIO_OPT_INT,
2037                 .off1   = td_var_offset(log_avg_msec),
2038                 .help   = "Average bw/iops/lat logs over this period of time",
2039                 .def    = "0",
2040         },
2041         {
2042                 .name   = "hugepage-size",
2043                 .type   = FIO_OPT_INT,
2044                 .off1   = td_var_offset(hugepage_size),
2045                 .help   = "When using hugepages, specify size of each page",
2046                 .def    = __fio_stringify(FIO_HUGE_PAGE),
2047         },
2048         {
2049                 .name   = "group_reporting",
2050                 .type   = FIO_OPT_STR_SET,
2051                 .off1   = td_var_offset(group_reporting),
2052                 .help   = "Do reporting on a per-group basis",
2053         },
2054         {
2055                 .name   = "zero_buffers",
2056                 .type   = FIO_OPT_STR_SET,
2057                 .off1   = td_var_offset(zero_buffers),
2058                 .help   = "Init IO buffers to all zeroes",
2059         },
2060         {
2061                 .name   = "refill_buffers",
2062                 .type   = FIO_OPT_STR_SET,
2063                 .off1   = td_var_offset(refill_buffers),
2064                 .help   = "Refill IO buffers on every IO submit",
2065         },
2066         {
2067                 .name   = "scramble_buffers",
2068                 .type   = FIO_OPT_BOOL,
2069                 .off1   = td_var_offset(scramble_buffers),
2070                 .help   = "Slightly scramble buffers on every IO submit",
2071                 .def    = "1",
2072         },
2073         {
2074                 .name   = "buffer_compress_percentage",
2075                 .type   = FIO_OPT_INT,
2076                 .off1   = td_var_offset(compress_percentage),
2077                 .maxval = 100,
2078                 .minval = 1,
2079                 .help   = "How compressible the buffer is (approximately)",
2080         },
2081         {
2082                 .name   = "buffer_compress_chunk",
2083                 .type   = FIO_OPT_INT,
2084                 .off1   = td_var_offset(compress_chunk),
2085                 .parent = "buffer_compress_percentage",
2086                 .help   = "Size of compressible region in buffer",
2087         },
2088         {
2089                 .name   = "clat_percentiles",
2090                 .type   = FIO_OPT_BOOL,
2091                 .off1   = td_var_offset(clat_percentiles),
2092                 .help   = "Enable the reporting of completion latency percentiles",
2093                 .def    = "1",
2094         },
2095         {
2096                 .name   = "percentile_list",
2097                 .type   = FIO_OPT_FLOAT_LIST,
2098                 .off1   = td_var_offset(percentile_list),
2099                 .off2   = td_var_offset(overwrite_plist),
2100                 .help   = "Specify a custom list of percentiles to report",
2101                 .maxlen = FIO_IO_U_LIST_MAX_LEN,
2102                 .minfp  = 0.0,
2103                 .maxfp  = 100.0,
2104         },
2105
2106 #ifdef FIO_HAVE_DISK_UTIL
2107         {
2108                 .name   = "disk_util",
2109                 .type   = FIO_OPT_BOOL,
2110                 .off1   = td_var_offset(do_disk_util),
2111                 .help   = "Log disk utilization statistics",
2112                 .def    = "1",
2113         },
2114 #endif
2115         {
2116                 .name   = "gtod_reduce",
2117                 .type   = FIO_OPT_BOOL,
2118                 .help   = "Greatly reduce number of gettimeofday() calls",
2119                 .cb     = str_gtod_reduce_cb,
2120                 .def    = "0",
2121         },
2122         {
2123                 .name   = "disable_lat",
2124                 .type   = FIO_OPT_BOOL,
2125                 .off1   = td_var_offset(disable_lat),
2126                 .help   = "Disable latency numbers",
2127                 .parent = "gtod_reduce",
2128                 .def    = "0",
2129         },
2130         {
2131                 .name   = "disable_clat",
2132                 .type   = FIO_OPT_BOOL,
2133                 .off1   = td_var_offset(disable_clat),
2134                 .help   = "Disable completion latency numbers",
2135                 .parent = "gtod_reduce",
2136                 .def    = "0",
2137         },
2138         {
2139                 .name   = "disable_slat",
2140                 .type   = FIO_OPT_BOOL,
2141                 .off1   = td_var_offset(disable_slat),
2142                 .help   = "Disable submission latency numbers",
2143                 .parent = "gtod_reduce",
2144                 .def    = "0",
2145         },
2146         {
2147                 .name   = "disable_bw_measurement",
2148                 .type   = FIO_OPT_BOOL,
2149                 .off1   = td_var_offset(disable_bw),
2150                 .help   = "Disable bandwidth logging",
2151                 .parent = "gtod_reduce",
2152                 .def    = "0",
2153         },
2154         {
2155                 .name   = "gtod_cpu",
2156                 .type   = FIO_OPT_INT,
2157                 .cb     = str_gtod_cpu_cb,
2158                 .help   = "Set up dedicated gettimeofday() thread on this CPU",
2159                 .verify = gtod_cpu_verify,
2160         },
2161         {
2162                 .name   = "continue_on_error",
2163                 .type   = FIO_OPT_STR,
2164                 .off1   = td_var_offset(continue_on_error),
2165                 .help   = "Continue on non-fatal errors during IO",
2166                 .def    = "none",
2167                 .posval = {
2168                           { .ival = "none",
2169                             .oval = ERROR_TYPE_NONE,
2170                             .help = "Exit when an error is encountered",
2171                           },
2172                           { .ival = "read",
2173                             .oval = ERROR_TYPE_READ,
2174                             .help = "Continue on read errors only",
2175                           },
2176                           { .ival = "write",
2177                             .oval = ERROR_TYPE_WRITE,
2178                             .help = "Continue on write errors only",
2179                           },
2180                           { .ival = "io",
2181                             .oval = ERROR_TYPE_READ | ERROR_TYPE_WRITE,
2182                             .help = "Continue on any IO errors",
2183                           },
2184                           { .ival = "verify",
2185                             .oval = ERROR_TYPE_VERIFY,
2186                             .help = "Continue on verify errors only",
2187                           },
2188                           { .ival = "all",
2189                             .oval = ERROR_TYPE_ANY,
2190                             .help = "Continue on all io and verify errors",
2191                           },
2192                           { .ival = "0",
2193                             .oval = ERROR_TYPE_NONE,
2194                             .help = "Alias for 'none'",
2195                           },
2196                           { .ival = "1",
2197                             .oval = ERROR_TYPE_ANY,
2198                             .help = "Alias for 'all'",
2199                           },
2200                 },
2201         },
2202         {
2203                 .name   = "profile",
2204                 .type   = FIO_OPT_STR_STORE,
2205                 .off1   = td_var_offset(profile),
2206                 .help   = "Select a specific builtin performance test",
2207         },
2208         {
2209                 .name   = "cgroup",
2210                 .type   = FIO_OPT_STR_STORE,
2211                 .off1   = td_var_offset(cgroup),
2212                 .help   = "Add job to cgroup of this name",
2213         },
2214         {
2215                 .name   = "cgroup_weight",
2216                 .type   = FIO_OPT_INT,
2217                 .off1   = td_var_offset(cgroup_weight),
2218                 .help   = "Use given weight for cgroup",
2219                 .minval = 100,
2220                 .maxval = 1000,
2221         },
2222         {
2223                 .name   = "cgroup_nodelete",
2224                 .type   = FIO_OPT_BOOL,
2225                 .off1   = td_var_offset(cgroup_nodelete),
2226                 .help   = "Do not delete cgroups after job completion",
2227                 .def    = "0",
2228         },
2229         {
2230                 .name   = "uid",
2231                 .type   = FIO_OPT_INT,
2232                 .off1   = td_var_offset(uid),
2233                 .help   = "Run job with this user ID",
2234         },
2235         {
2236                 .name   = "gid",
2237                 .type   = FIO_OPT_INT,
2238                 .off1   = td_var_offset(gid),
2239                 .help   = "Run job with this group ID",
2240         },
2241         {
2242                 .name   = "flow_id",
2243                 .type   = FIO_OPT_INT,
2244                 .off1   = td_var_offset(flow_id),
2245                 .help   = "The flow index ID to use",
2246                 .def    = "0",
2247         },
2248         {
2249                 .name   = "flow",
2250                 .type   = FIO_OPT_INT,
2251                 .off1   = td_var_offset(flow),
2252                 .help   = "Weight for flow control of this job",
2253                 .parent = "flow_id",
2254                 .def    = "0",
2255         },
2256         {
2257                 .name   = "flow_watermark",
2258                 .type   = FIO_OPT_INT,
2259                 .off1   = td_var_offset(flow_watermark),
2260                 .help   = "High watermark for flow control. This option"
2261                         " should be set to the same value for all threads"
2262                         " with non-zero flow.",
2263                 .parent = "flow_id",
2264                 .def    = "1024",
2265         },
2266         {
2267                 .name   = "flow_sleep",
2268                 .type   = FIO_OPT_INT,
2269                 .off1   = td_var_offset(flow_sleep),
2270                 .help   = "How many microseconds to sleep after being held"
2271                         " back by the flow control mechanism",
2272                 .parent = "flow_id",
2273                 .def    = "0",
2274         },
2275         {
2276                 .name = NULL,
2277         },
2278 };
2279
2280 static void add_to_lopt(struct option *lopt, struct fio_option *o,
2281                         const char *name, int val)
2282 {
2283         lopt->name = (char *) name;
2284         lopt->val = val;
2285         if (o->type == FIO_OPT_STR_SET)
2286                 lopt->has_arg = no_argument;
2287         else
2288                 lopt->has_arg = required_argument;
2289 }
2290
2291 static void options_to_lopts(struct fio_option *opts,
2292                               struct option *long_options,
2293                               int i, int option_type)
2294 {
2295         struct fio_option *o = &opts[0];
2296         while (o->name) {
2297                 add_to_lopt(&long_options[i], o, o->name, option_type);
2298                 if (o->alias) {
2299                         i++;
2300                         add_to_lopt(&long_options[i], o, o->alias, option_type);
2301                 }
2302
2303                 i++;
2304                 o++;
2305                 assert(i < FIO_NR_OPTIONS);
2306         }
2307 }
2308
2309 void fio_options_set_ioengine_opts(struct option *long_options,
2310                                    struct thread_data *td)
2311 {
2312         unsigned int i;
2313
2314         i = 0;
2315         while (long_options[i].name) {
2316                 if (long_options[i].val == FIO_GETOPT_IOENGINE) {
2317                         memset(&long_options[i], 0, sizeof(*long_options));
2318                         break;
2319                 }
2320                 i++;
2321         }
2322
2323         /*
2324          * Just clear out the prior ioengine options.
2325          */
2326         if (!td || !td->eo)
2327                 return;
2328
2329         options_to_lopts(td->io_ops->options, long_options, i,
2330                          FIO_GETOPT_IOENGINE);
2331 }
2332
2333 void fio_options_dup_and_init(struct option *long_options)
2334 {
2335         unsigned int i;
2336
2337         options_init(options);
2338
2339         i = 0;
2340         while (long_options[i].name)
2341                 i++;
2342
2343         options_to_lopts(options, long_options, i, FIO_GETOPT_JOB);
2344 }
2345
2346 struct fio_keyword {
2347         const char *word;
2348         const char *desc;
2349         char *replace;
2350 };
2351
2352 static struct fio_keyword fio_keywords[] = {
2353         {
2354                 .word   = "$pagesize",
2355                 .desc   = "Page size in the system",
2356         },
2357         {
2358                 .word   = "$mb_memory",
2359                 .desc   = "Megabytes of memory online",
2360         },
2361         {
2362                 .word   = "$ncpus",
2363                 .desc   = "Number of CPUs online in the system",
2364         },
2365         {
2366                 .word   = NULL,
2367         },
2368 };
2369
2370 void fio_keywords_init(void)
2371 {
2372         unsigned long long mb_memory;
2373         char buf[128];
2374         long l;
2375
2376         sprintf(buf, "%lu", page_size);
2377         fio_keywords[0].replace = strdup(buf);
2378
2379         mb_memory = os_phys_mem() / (1024 * 1024);
2380         sprintf(buf, "%llu", mb_memory);
2381         fio_keywords[1].replace = strdup(buf);
2382
2383         l = cpus_online();
2384         sprintf(buf, "%lu", l);
2385         fio_keywords[2].replace = strdup(buf);
2386 }
2387
2388 #define BC_APP          "bc"
2389
2390 static char *bc_calc(char *str)
2391 {
2392         char buf[128], *tmp;
2393         FILE *f;
2394         int ret;
2395
2396         /*
2397          * No math, just return string
2398          */
2399         if ((!strchr(str, '+') && !strchr(str, '-') && !strchr(str, '*') &&
2400              !strchr(str, '/')) || strchr(str, '\''))
2401                 return str;
2402
2403         /*
2404          * Split option from value, we only need to calculate the value
2405          */
2406         tmp = strchr(str, '=');
2407         if (!tmp)
2408                 return str;
2409
2410         tmp++;
2411
2412         /*
2413          * Prevent buffer overflows; such a case isn't reasonable anyway
2414          */
2415         if (strlen(str) >= 128 || strlen(tmp) > 100)
2416                 return str;
2417
2418         sprintf(buf, "which %s > /dev/null", BC_APP);
2419         if (system(buf)) {
2420                 log_err("fio: bc is needed for performing math\n");
2421                 return NULL;
2422         }
2423
2424         sprintf(buf, "echo '%s' | %s", tmp, BC_APP);
2425         f = popen(buf, "r");
2426         if (!f) {
2427                 return NULL;
2428         }
2429
2430         ret = fread(&buf[tmp - str], 1, 128 - (tmp - str), f);
2431         if (ret <= 0) {
2432                 return NULL;
2433         }
2434
2435         pclose(f);
2436         buf[(tmp - str) + ret - 1] = '\0';
2437         memcpy(buf, str, tmp - str);
2438         free(str);
2439         return strdup(buf);
2440 }
2441
2442 /*
2443  * Return a copy of the input string with substrings of the form ${VARNAME}
2444  * substituted with the value of the environment variable VARNAME.  The
2445  * substitution always occurs, even if VARNAME is empty or the corresponding
2446  * environment variable undefined.
2447  */
2448 static char *option_dup_subs(const char *opt)
2449 {
2450         char out[OPT_LEN_MAX+1];
2451         char in[OPT_LEN_MAX+1];
2452         char *outptr = out;
2453         char *inptr = in;
2454         char *ch1, *ch2, *env;
2455         ssize_t nchr = OPT_LEN_MAX;
2456         size_t envlen;
2457
2458         if (strlen(opt) + 1 > OPT_LEN_MAX) {
2459                 log_err("OPT_LEN_MAX (%d) is too small\n", OPT_LEN_MAX);
2460                 return NULL;
2461         }
2462
2463         in[OPT_LEN_MAX] = '\0';
2464         strncpy(in, opt, OPT_LEN_MAX);
2465
2466         while (*inptr && nchr > 0) {
2467                 if (inptr[0] == '$' && inptr[1] == '{') {
2468                         ch2 = strchr(inptr, '}');
2469                         if (ch2 && inptr+1 < ch2) {
2470                                 ch1 = inptr+2;
2471                                 inptr = ch2+1;
2472                                 *ch2 = '\0';
2473
2474                                 env = getenv(ch1);
2475                                 if (env) {
2476                                         envlen = strlen(env);
2477                                         if (envlen <= nchr) {
2478                                                 memcpy(outptr, env, envlen);
2479                                                 outptr += envlen;
2480                                                 nchr -= envlen;
2481                                         }
2482                                 }
2483
2484                                 continue;
2485                         }
2486                 }
2487
2488                 *outptr++ = *inptr++;
2489                 --nchr;
2490         }
2491
2492         *outptr = '\0';
2493         return strdup(out);
2494 }
2495
2496 /*
2497  * Look for reserved variable names and replace them with real values
2498  */
2499 static char *fio_keyword_replace(char *opt)
2500 {
2501         char *s;
2502         int i;
2503         int docalc = 0;
2504
2505         for (i = 0; fio_keywords[i].word != NULL; i++) {
2506                 struct fio_keyword *kw = &fio_keywords[i];
2507
2508                 while ((s = strstr(opt, kw->word)) != NULL) {
2509                         char *new = malloc(strlen(opt) + 1);
2510                         char *o_org = opt;
2511                         int olen = s - opt;
2512                         int len;
2513
2514                         /*
2515                          * Copy part of the string before the keyword and
2516                          * sprintf() the replacement after it.
2517                          */
2518                         memcpy(new, opt, olen);
2519                         len = sprintf(new + olen, "%s", kw->replace);
2520
2521                         /*
2522                          * If there's more in the original string, copy that
2523                          * in too
2524                          */
2525                         opt += strlen(kw->word) + olen;
2526                         if (strlen(opt))
2527                                 memcpy(new + olen + len, opt, opt - o_org - 1);
2528
2529                         /*
2530                          * replace opt and free the old opt
2531                          */
2532                         opt = new;
2533                         free(o_org);
2534
2535                         docalc = 1;
2536                 }
2537         }
2538
2539         /*
2540          * Check for potential math and invoke bc, if possible
2541          */
2542         if (docalc)
2543                 opt = bc_calc(opt);
2544
2545         return opt;
2546 }
2547
2548 static char **dup_and_sub_options(char **opts, int num_opts)
2549 {
2550         int i;
2551         char **opts_copy = malloc(num_opts * sizeof(*opts));
2552         for (i = 0; i < num_opts; i++) {
2553                 opts_copy[i] = option_dup_subs(opts[i]);
2554                 if (!opts_copy[i])
2555                         continue;
2556                 opts_copy[i] = fio_keyword_replace(opts_copy[i]);
2557         }
2558         return opts_copy;
2559 }
2560
2561 int fio_options_parse(struct thread_data *td, char **opts, int num_opts)
2562 {
2563         int i, ret, unknown;
2564         char **opts_copy;
2565
2566         sort_options(opts, options, num_opts);
2567         opts_copy = dup_and_sub_options(opts, num_opts);
2568
2569         for (ret = 0, i = 0, unknown = 0; i < num_opts; i++) {
2570                 struct fio_option *o;
2571                 int newret = parse_option(opts_copy[i], opts[i], options, &o,
2572                                           td);
2573
2574                 if (opts_copy[i]) {
2575                         if (newret && !o) {
2576                                 unknown++;
2577                                 continue;
2578                         }
2579                         free(opts_copy[i]);
2580                         opts_copy[i] = NULL;
2581                 }
2582
2583                 ret |= newret;
2584         }
2585
2586         if (unknown) {
2587                 ret |= ioengine_load(td);
2588                 if (td->eo) {
2589                         sort_options(opts_copy, td->io_ops->options, num_opts);
2590                         opts = opts_copy;
2591                 }
2592                 for (i = 0; i < num_opts; i++) {
2593                         struct fio_option *o = NULL;
2594                         int newret = 1;
2595                         if (!opts_copy[i])
2596                                 continue;
2597
2598                         if (td->eo)
2599                                 newret = parse_option(opts_copy[i], opts[i],
2600                                                       td->io_ops->options, &o,
2601                                                       td->eo);
2602
2603                         ret |= newret;
2604                         if (!o)
2605                                 log_err("Bad option <%s>\n", opts[i]);
2606
2607                         free(opts_copy[i]);
2608                         opts_copy[i] = NULL;
2609                 }
2610         }
2611
2612         free(opts_copy);
2613         return ret;
2614 }
2615
2616 int fio_cmd_option_parse(struct thread_data *td, const char *opt, char *val)
2617 {
2618         return parse_cmd_option(opt, val, options, td);
2619 }
2620
2621 int fio_cmd_ioengine_option_parse(struct thread_data *td, const char *opt,
2622                                 char *val)
2623 {
2624         return parse_cmd_option(opt, val, td->io_ops->options, td);
2625 }
2626
2627 void fio_fill_default_options(struct thread_data *td)
2628 {
2629         fill_default_options(td, options);
2630 }
2631
2632 int fio_show_option_help(const char *opt)
2633 {
2634         return show_cmd_help(options, opt);
2635 }
2636
2637 void options_mem_dupe(void *data, struct fio_option *options)
2638 {
2639         struct fio_option *o;
2640         char **ptr;
2641
2642         for (o = &options[0]; o->name; o++) {
2643                 if (o->type != FIO_OPT_STR_STORE)
2644                         continue;
2645
2646                 ptr = td_var(data, o->off1);
2647                 if (*ptr)
2648                         *ptr = strdup(*ptr);
2649         }
2650 }
2651
2652 /*
2653  * dupe FIO_OPT_STR_STORE options
2654  */
2655 void fio_options_mem_dupe(struct thread_data *td)
2656 {
2657         options_mem_dupe(&td->o, options);
2658
2659         if (td->eo && td->io_ops) {
2660                 void *oldeo = td->eo;
2661
2662                 td->eo = malloc(td->io_ops->option_struct_size);
2663                 memcpy(td->eo, oldeo, td->io_ops->option_struct_size);
2664                 options_mem_dupe(td->eo, td->io_ops->options);
2665         }
2666 }
2667
2668 unsigned int fio_get_kb_base(void *data)
2669 {
2670         struct thread_data *td = data;
2671         unsigned int kb_base = 0;
2672
2673         if (td)
2674                 kb_base = td->o.kb_base;
2675         if (!kb_base)
2676                 kb_base = 1024;
2677
2678         return kb_base;
2679 }
2680
2681 int add_option(struct fio_option *o)
2682 {
2683         struct fio_option *__o;
2684         int opt_index = 0;
2685
2686         __o = options;
2687         while (__o->name) {
2688                 opt_index++;
2689                 __o++;
2690         }
2691
2692         memcpy(&options[opt_index], o, sizeof(*o));
2693         return 0;
2694 }
2695
2696 void invalidate_profile_options(const char *prof_name)
2697 {
2698         struct fio_option *o;
2699
2700         o = options;
2701         while (o->name) {
2702                 if (o->prof_name && !strcmp(o->prof_name, prof_name)) {
2703                         o->type = FIO_OPT_INVALID;
2704                         o->prof_name = NULL;
2705                 }
2706                 o++;
2707         }
2708 }
2709
2710 void add_opt_posval(const char *optname, const char *ival, const char *help)
2711 {
2712         struct fio_option *o;
2713         unsigned int i;
2714
2715         o = find_option(options, optname);
2716         if (!o)
2717                 return;
2718
2719         for (i = 0; i < PARSE_MAX_VP; i++) {
2720                 if (o->posval[i].ival)
2721                         continue;
2722
2723                 o->posval[i].ival = ival;
2724                 o->posval[i].help = help;
2725                 break;
2726         }
2727 }
2728
2729 void del_opt_posval(const char *optname, const char *ival)
2730 {
2731         struct fio_option *o;
2732         unsigned int i;
2733
2734         o = find_option(options, optname);
2735         if (!o)
2736                 return;
2737
2738         for (i = 0; i < PARSE_MAX_VP; i++) {
2739                 if (!o->posval[i].ival)
2740                         continue;
2741                 if (strcmp(o->posval[i].ival, ival))
2742                         continue;
2743
2744                 o->posval[i].ival = NULL;
2745                 o->posval[i].help = NULL;
2746         }
2747 }
2748
2749 void fio_options_free(struct thread_data *td)
2750 {
2751         options_free(options, td);
2752         if (td->eo && td->io_ops && td->io_ops->options) {
2753                 options_free(td->io_ops->options, td->eo);
2754                 free(td->eo);
2755                 td->eo = NULL;
2756         }
2757 }