init.c

   1 /*
   2  * This file contains job initialization and setup functions.
   3  */
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <unistd.h>
   7 #include <fcntl.h>
   8 #include <ctype.h>
   9 #include <string.h>
  10 #include <errno.h>
  11 #include <sys/ipc.h>
  12 #include <sys/shm.h>
  13 #include <sys/types.h>
  14 #include <sys/stat.h>
  15
  16 #include "fio.h"
  17 #include "parse.h"
  18
  19 /*
  20  * The default options
  21  */
  22 #define DEF_BS                  (4096)
  23 #define DEF_TIMEOUT             (0)
  24 #define DEF_RATE_CYCLE          (1000)
  25 #define DEF_ODIRECT             (1)
  26 #define DEF_IO_ENGINE           (FIO_SYNCIO)
  27 #define DEF_IO_ENGINE_NAME      "sync"
  28 #define DEF_SEQUENTIAL          (1)
  29 #define DEF_RAND_REPEAT         (1)
  30 #define DEF_OVERWRITE           (1)
  31 #define DEF_INVALIDATE          (1)
  32 #define DEF_SYNCIO              (0)
  33 #define DEF_RANDSEED            (0xb1899bedUL)
  34 #define DEF_BWAVGTIME           (500)
  35 #define DEF_CREATE_SER          (1)
  36 #define DEF_CREATE_FSYNC        (1)
  37 #define DEF_LOOPS               (1)
  38 #define DEF_VERIFY              (0)
  39 #define DEF_STONEWALL           (0)
  40 #define DEF_NUMJOBS             (1)
  41 #define DEF_USE_THREAD          (0)
  42 #define DEF_FILE_SIZE           (1024 * 1024 * 1024UL)
  43 #define DEF_ZONE_SIZE           (0)
  44 #define DEF_ZONE_SKIP           (0)
  45 #define DEF_RWMIX_CYCLE         (500)
  46 #define DEF_RWMIX_READ          (50)
  47 #define DEF_NICE                (0)
  48 #define DEF_NR_FILES            (1)
  49 #define DEF_UNLINK              (0)
  50 #define DEF_WRITE_BW_LOG        (0)
  51 #define DEF_WRITE_LAT_LOG       (0)
  52
  53 #define td_var_offset(var)      ((size_t) &((struct thread_data *)0)->var)
  54
  55 static int str_rw_cb(void *, char *);
  56 static int str_ioengine_cb(void *, char *);
  57 static int str_mem_cb(void *, char *);
  58 static int str_verify_cb(void *, char *);
  59 static int str_lockmem_cb(void *, unsigned long *);
  60 static int str_prio_cb(void *, unsigned int *);
  61 static int str_prioclass_cb(void *, unsigned int *);
  62 static int str_exitall_cb(void);
  63 static int str_cpumask_cb(void *, unsigned int *);
  64
  65 /*
  66  * Map of job/command line options
  67  */
  68 static struct fio_option options[] = {
  69         {
  70                 .name   = "name",
  71                 .type   = FIO_OPT_STR_STORE,
  72                 .off1   = td_var_offset(name),
  73         },
  74         {
  75                 .name   = "directory",
  76                 .type   = FIO_OPT_STR_STORE,
  77                 .off1   = td_var_offset(directory),
  78         },
  79         {
  80                 .name   = "filename",
  81                 .type   = FIO_OPT_STR_STORE,
  82                 .off1   = td_var_offset(filename),
  83         },
  84         {
  85                 .name   = "rw",
  86                 .type   = FIO_OPT_STR,
  87                 .cb     = str_rw_cb,
  88         },
  89         {
  90                 .name   = "ioengine",
  91                 .type   = FIO_OPT_STR,
  92                 .cb     = str_ioengine_cb,
  93         },
  94         {
  95                 .name   = "mem",
  96                 .type   = FIO_OPT_STR,
  97                 .cb     = str_mem_cb,
  98         },
  99         {
 100                 .name   = "verify",
 101                 .type   = FIO_OPT_STR,
 102                 .cb     = str_verify_cb,
 103         },
 104         {
 105                 .name   = "write_iolog",
 106                 .type   = FIO_OPT_STR_STORE,
 107                 .off1   = td_var_offset(write_iolog_file),
 108         },
 109         {
 110                 .name   = "read_iolog",
 111                 .type   = FIO_OPT_STR_STORE,
 112                 .off1   = td_var_offset(read_iolog_file),
 113         },
 114         {
 115                 .name   = "exec_prerun",
 116                 .type   = FIO_OPT_STR_STORE,
 117                 .off1   = td_var_offset(exec_prerun),
 118         },
 119         {
 120                 .name   = "exec_postrun",
 121                 .type   = FIO_OPT_STR_STORE,
 122                 .off1   = td_var_offset(exec_postrun),
 123         },
 124 #ifdef FIO_HAVE_IOSCHED_SWITCH
 125         {
 126                 .name   = "ioscheduler",
 127                 .type   = FIO_OPT_STR_STORE,
 128                 .off1   = td_var_offset(ioscheduler),
 129         },
 130 #endif
 131         {
 132                 .name   = "size",
 133                 .type   = FIO_OPT_STR_VAL,
 134                 .off1   = td_var_offset(total_file_size),
 135         },
 136         {
 137                 .name   = "bs",
 138                 .type   = FIO_OPT_STR_VAL,
 139                 .off1   = td_var_offset(bs),
 140         },
 141         {
 142                 .name   = "offset",
 143                 .type   = FIO_OPT_STR_VAL,
 144                 .off1   = td_var_offset(start_offset),
 145         },
 146         {
 147                 .name   = "zonesize",
 148                 .type   = FIO_OPT_STR_VAL,
 149                 .off1   = td_var_offset(zone_size),
 150         },
 151         {
 152                 .name   = "zoneskip",
 153                 .type   = FIO_OPT_STR_VAL,
 154                 .off1   = td_var_offset(zone_skip),
 155         },
 156         {
 157                 .name   = "lockmem",
 158                 .type   = FIO_OPT_STR_VAL,
 159                 .cb     = str_lockmem_cb,
 160         },
 161         {
 162                 .name   = "bsrange",
 163                 .type   = FIO_OPT_RANGE,
 164                 .off1   = td_var_offset(min_bs),
 165                 .off2   = td_var_offset(max_bs),
 166         },
 167         {
 168                 .name   = "nrfiles",
 169                 .type   = FIO_OPT_INT,
 170                 .off1   = td_var_offset(nr_files),
 171         },
 172         {
 173                 .name   = "iodepth",
 174                 .type   = FIO_OPT_INT,
 175                 .off1   = td_var_offset(iodepth),
 176         },
 177         {
 178                 .name   = "fsync",
 179                 .type   = FIO_OPT_INT,
 180                 .off1   = td_var_offset(fsync_blocks),
 181         },
 182         {
 183                 .name   = "rwmixcycle",
 184                 .type   = FIO_OPT_INT,
 185                 .off1   = td_var_offset(rwmixcycle),
 186         },
 187         {
 188                 .name   = "rwmixread",
 189                 .type   = FIO_OPT_INT,
 190                 .off1   = td_var_offset(rwmixread),
 191                 .max_val= 100,
 192         },
 193         {
 194                 .name   = "rwmixwrite",
 195                 .type   = FIO_OPT_INT,
 196                 .off1   = td_var_offset(rwmixwrite),
 197                 .max_val= 100,
 198         },
 199         {
 200                 .name   = "nice",
 201                 .type   = FIO_OPT_INT,
 202                 .off1   = td_var_offset(nice),
 203         },
 204 #ifdef FIO_HAVE_IOPRIO
 205         {
 206                 .name   = "prio",
 207                 .type   = FIO_OPT_INT,
 208                 .cb     = str_prio_cb,
 209         },
 210         {
 211                 .name   = "prioclass",
 212                 .type   = FIO_OPT_INT,
 213                 .cb     = str_prioclass_cb,
 214         },
 215 #endif
 216         {
 217                 .name   = "thinktime",
 218                 .type   = FIO_OPT_INT,
 219                 .off1   = td_var_offset(thinktime)
 220         },
 221         {
 222                 .name   = "rate",
 223                 .type   = FIO_OPT_INT,
 224                 .off1   = td_var_offset(rate)
 225         },
 226         {
 227                 .name   = "ratemin",
 228                 .type   = FIO_OPT_INT,
 229                 .off1   = td_var_offset(ratemin)
 230         },
 231         {
 232                 .name   = "ratecycle",
 233                 .type   = FIO_OPT_INT,
 234                 .off1   = td_var_offset(ratecycle)
 235         },
 236         {
 237                 .name   = "startdelay",
 238                 .type   = FIO_OPT_INT,
 239                 .off1   = td_var_offset(start_delay)
 240         },
 241         {
 242                 .name   = "timeout",
 243                 .type   = FIO_OPT_STR_VAL_TIME,
 244                 .off1   = td_var_offset(timeout)
 245         },
 246         {
 247                 .name   = "invalidate",
 248                 .type   = FIO_OPT_INT,
 249                 .off1   = td_var_offset(invalidate_cache)
 250         },
 251         {
 252                 .name   = "sync",
 253                 .type   = FIO_OPT_INT,
 254                 .off1   = td_var_offset(sync_io)
 255         },
 256         {
 257                 .name   = "bwavgtime",
 258                 .type   = FIO_OPT_INT,
 259                 .off1   = td_var_offset(bw_avg_time)
 260         },
 261         {
 262                 .name   = "create_serialize",
 263                 .type   = FIO_OPT_INT,
 264                 .off1   = td_var_offset(create_serialize)
 265         },
 266         {
 267                 .name   = "create_fsync",
 268                 .type   = FIO_OPT_INT,
 269                 .off1   = td_var_offset(create_fsync)
 270         },
 271         {
 272                 .name   = "loops",
 273                 .type   = FIO_OPT_INT,
 274                 .off1   = td_var_offset(loops)
 275         },
 276         {
 277                 .name   = "numjobs",
 278                 .type   = FIO_OPT_INT,
 279                 .off1   = td_var_offset(numjobs)
 280         },
 281         {
 282                 .name   = "cpuload",
 283                 .type   = FIO_OPT_INT,
 284                 .off1   = td_var_offset(cpuload)
 285         },
 286         {
 287                 .name   = "cpuchunks",
 288                 .type   = FIO_OPT_INT,
 289                 .off1   = td_var_offset(cpucycle)
 290         },
 291         {
 292                 .name   = "direct",
 293                 .type   = FIO_OPT_INT,
 294                 .off1   = td_var_offset(odirect)
 295         },
 296         {
 297                 .name   = "overwrite",
 298                 .type   = FIO_OPT_INT,
 299                 .off1   = td_var_offset(overwrite)
 300         },
 301 #ifdef FIO_HAVE_CPU_AFFINITY
 302         {
 303                 .name   = "cpumask",
 304                 .type   = FIO_OPT_INT,
 305                 .cb     = str_cpumask_cb,
 306         },
 307 #endif
 308         {
 309                 .name   = "end_fsync",
 310                 .type   = FIO_OPT_INT,
 311                 .off1   = td_var_offset(end_fsync)
 312         },
 313         {
 314                 .name   = "unlink",
 315                 .type   = FIO_OPT_STR_SET,
 316                 .off1   = td_var_offset(unlink),
 317         },
 318         {
 319                 .name   = "exitall",
 320                 .type   = FIO_OPT_STR_SET,
 321                 .cb     = str_exitall_cb,
 322         },
 323         {
 324                 .name   = "stonewall",
 325                 .type   = FIO_OPT_STR_SET,
 326                 .off1   = td_var_offset(stonewall),
 327         },
 328         {
 329                 .name   = "thread",
 330                 .type   = FIO_OPT_STR_SET,
 331                 .off1   = td_var_offset(thread),
 332         },
 333         {
 334                 .name   = "write_bw_log",
 335                 .type   = FIO_OPT_STR_SET,
 336                 .off1   = td_var_offset(write_bw_log),
 337         },
 338         {
 339                 .name   = "write_lat_log",
 340                 .type   = FIO_OPT_STR_SET,
 341                 .off1   = td_var_offset(write_lat_log),
 342         },
 343         {
 344                 .name = NULL,
 345         },
 346 };
 347
 348 static int def_timeout = DEF_TIMEOUT;
 349
 350 static char fio_version_string[] = "fio 1.5";
 351
 352 static char **ini_file;
 353 static int max_jobs = MAX_JOBS;
 354
 355 struct thread_data def_thread;
 356 struct thread_data *threads = NULL;
 357
 358 int rate_quit = 0;
 359 int exitall_on_terminate = 0;
 360 int terse_output = 0;
 361 unsigned long long mlock_size = 0;
 362 FILE *f_out = NULL;
 363 FILE *f_err = NULL;
 364
 365 static int write_lat_log = DEF_WRITE_LAT_LOG;
 366 static int write_bw_log = DEF_WRITE_BW_LOG;
 367
 368 /*
 369  * Return a free job structure.
 370  */
 371 static struct thread_data *get_new_job(int global, struct thread_data *parent)
 372 {
 373         struct thread_data *td;
 374
 375         if (global)
 376                 return &def_thread;
 377         if (thread_number >= max_jobs)
 378                 return NULL;
 379
 380         td = &threads[thread_number++];
 381         *td = *parent;
 382         td->name[0] = '\0';
 383
 384         td->thread_number = thread_number;
 385         return td;
 386 }
 387
 388 static void put_job(struct thread_data *td)
 389 {
 390         memset(&threads[td->thread_number - 1], 0, sizeof(*td));
 391         thread_number--;
 392 }
 393
 394 /*
 395  * Lazy way of fixing up options that depend on each other. We could also
 396  * define option callback handlers, but this is easier.
 397  */
 398 static void fixup_options(struct thread_data *td)
 399 {
 400         if (!td->min_bs)
 401                 td->min_bs = td->bs;
 402         if (!td->max_bs)
 403                 td->max_bs = td->bs;
 404
 405         if (!td->rwmixread && td->rwmixwrite)
 406                 td->rwmixread = 100 - td->rwmixwrite;
 407
 408         if (td->write_iolog_file && td->read_iolog_file) {
 409                 log_err("fio: read iolog overrides write_iolog\n");
 410                 free(td->write_iolog_file);
 411                 td->write_iolog_file = NULL;
 412         }
 413 }
 414
 415 /*
 416  * Adds a job to the list of things todo. Sanitizes the various options
 417  * to make sure we don't have conflicts, and initializes various
 418  * members of td.
 419  */
 420 static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
 421 {
 422         char *ddir_str[] = { "read", "write", "randread", "randwrite",
 423                              "rw", NULL, "randrw" };
 424         struct stat sb;
 425         int numjobs, ddir, i;
 426         struct fio_file *f;
 427
 428 #ifndef FIO_HAVE_LIBAIO
 429         if (td->io_engine == FIO_LIBAIO) {
 430                 log_err("Linux libaio not available\n");
 431                 return 1;
 432         }
 433 #endif
 434 #ifndef FIO_HAVE_POSIXAIO
 435         if (td->io_engine == FIO_POSIXAIO) {
 436                 log_err("posix aio not available\n");
 437                 return 1;
 438         }
 439 #endif
 440
 441         fixup_options(td);
 442
 443         /*
 444          * the def_thread is just for options, it's not a real job
 445          */
 446         if (td == &def_thread)
 447                 return 0;
 448
 449         /*
 450          * Set default io engine, if none set
 451          */
 452         if (!td->io_ops) {
 453                 td->io_ops = load_ioengine(td, DEF_IO_ENGINE_NAME);
 454                 if (!td->io_ops) {
 455                         log_err("default engine %s not there?\n", DEF_IO_ENGINE_NAME);
 456                         return 1;
 457                 }
 458         }
 459
 460         if (td->io_ops->flags & FIO_SYNCIO)
 461                 td->iodepth = 1;
 462         else {
 463                 if (!td->iodepth)
 464                         td->iodepth = td->nr_files;
 465         }
 466
 467         /*
 468          * only really works for sequential io for now, and with 1 file
 469          */
 470         if (td->zone_size && !td->sequential && td->nr_files == 1)
 471                 td->zone_size = 0;
 472
 473         /*
 474          * Reads can do overwrites, we always need to pre-create the file
 475          */
 476         if (td_read(td) || td_rw(td))
 477                 td->overwrite = 1;
 478
 479         td->filetype = FIO_TYPE_FILE;
 480         if (!stat(jobname, &sb)) {
 481                 if (S_ISBLK(sb.st_mode))
 482                         td->filetype = FIO_TYPE_BD;
 483                 else if (S_ISCHR(sb.st_mode))
 484                         td->filetype = FIO_TYPE_CHAR;
 485         }
 486
 487         if (td->odirect)
 488                 td->io_ops->flags |= FIO_RAWIO;
 489
 490         if (td->filename)
 491                 td->nr_uniq_files = 1;
 492         else
 493                 td->nr_uniq_files = td->nr_files;
 494
 495         if (td->filetype == FIO_TYPE_FILE || td->filename) {
 496                 char tmp[PATH_MAX];
 497                 int len = 0;
 498                 int i;
 499
 500                 if (td->directory && td->directory[0] != '\0')
 501                         sprintf(tmp, "%s/", td->directory);
 502
 503                 td->files = malloc(sizeof(struct fio_file) * td->nr_files);
 504
 505                 for_each_file(td, f, i) {
 506                         memset(f, 0, sizeof(*f));
 507                         f->fd = -1;
 508
 509                         if (td->filename)
 510                                 sprintf(tmp + len, "%s", td->filename);
 511                         else
 512                                 sprintf(tmp + len, "%s.%d.%d", jobname, td->thread_number, i);
 513                         f->file_name = strdup(tmp);
 514                 }
 515         } else {
 516                 td->nr_files = 1;
 517                 td->files = malloc(sizeof(struct fio_file));
 518                 f = &td->files[0];
 519
 520                 memset(f, 0, sizeof(*f));
 521                 f->fd = -1;
 522                 f->file_name = strdup(jobname);
 523         }
 524
 525         for_each_file(td, f, i) {
 526                 f->file_size = td->total_file_size / td->nr_files;
 527                 f->file_offset = td->start_offset;
 528         }
 529
 530         fio_sem_init(&td->mutex, 0);
 531
 532         td->clat_stat[0].min_val = td->clat_stat[1].min_val = ULONG_MAX;
 533         td->slat_stat[0].min_val = td->slat_stat[1].min_val = ULONG_MAX;
 534         td->bw_stat[0].min_val = td->bw_stat[1].min_val = ULONG_MAX;
 535
 536         if (td->min_bs == -1U)
 537                 td->min_bs = td->bs;
 538         if (td->max_bs == -1U)
 539                 td->max_bs = td->bs;
 540         if (td_read(td) && !td_rw(td))
 541                 td->verify = 0;
 542
 543         if (td->stonewall && td->thread_number > 1)
 544                 groupid++;
 545
 546         td->groupid = groupid;
 547
 548         if (setup_rate(td))
 549                 goto err;
 550
 551         if (td->write_lat_log) {
 552                 setup_log(&td->slat_log);
 553                 setup_log(&td->clat_log);
 554         }
 555         if (td->write_bw_log)
 556                 setup_log(&td->bw_log);
 557
 558         if (td->name[0] == '\0')
 559                 snprintf(td->name, sizeof(td->name)-1, "client%d", td->thread_number);
 560
 561         ddir = td->ddir + (!td->sequential << 1) + (td->iomix << 2);
 562
 563         if (!terse_output) {
 564                 if (!job_add_num) {
 565                         if (td->io_ops->flags & FIO_CPUIO)
 566                                 fprintf(f_out, "%s: ioengine=cpu, cpuload=%u, cpucycle=%u\n", td->name, td->cpuload, td->cpucycle);
 567                         else
 568                                 fprintf(f_out, "%s: (g=%d): rw=%s, odir=%d, bs=%d-%d, rate=%d, ioengine=%s, iodepth=%d\n", td->name, td->groupid, ddir_str[ddir], td->odirect, td->min_bs, td->max_bs, td->rate, td->io_ops->name, td->iodepth);
 569                 } else if (job_add_num == 1)
 570                         fprintf(f_out, "...\n");
 571         }
 572
 573         /*
 574          * recurse add identical jobs, clear numjobs and stonewall options
 575          * as they don't apply to sub-jobs
 576          */
 577         numjobs = td->numjobs;
 578         while (--numjobs) {
 579                 struct thread_data *td_new = get_new_job(0, td);
 580
 581                 if (!td_new)
 582                         goto err;
 583
 584                 td_new->numjobs = 1;
 585                 td_new->stonewall = 0;
 586                 job_add_num = numjobs - 1;
 587
 588                 if (add_job(td_new, jobname, job_add_num))
 589                         goto err;
 590         }
 591         return 0;
 592 err:
 593         put_job(td);
 594         return -1;
 595 }
 596
 597 /*
 598  * Initialize the various random states we need (random io, block size ranges,
 599  * read/write mix, etc).
 600  */
 601 int init_random_state(struct thread_data *td)
 602 {
 603         unsigned long seeds[4];
 604         int fd, num_maps, blocks, i;
 605         struct fio_file *f;
 606
 607         fd = open("/dev/urandom", O_RDONLY);
 608         if (fd == -1) {
 609                 td_verror(td, errno);
 610                 return 1;
 611         }
 612
 613         if (read(fd, seeds, sizeof(seeds)) < (int) sizeof(seeds)) {
 614                 td_verror(td, EIO);
 615                 close(fd);
 616                 return 1;
 617         }
 618
 619         close(fd);
 620
 621         os_random_seed(seeds[0], &td->bsrange_state);
 622         os_random_seed(seeds[1], &td->verify_state);
 623         os_random_seed(seeds[2], &td->rwmix_state);
 624
 625         if (td->sequential)
 626                 return 0;
 627
 628         if (td->rand_repeatable)
 629                 seeds[3] = DEF_RANDSEED;
 630
 631         for_each_file(td, f, i) {
 632                 blocks = (f->file_size + td->min_bs - 1) / td->min_bs;
 633                 num_maps = blocks / BLOCKS_PER_MAP;
 634                 f->file_map = malloc(num_maps * sizeof(long));
 635                 f->num_maps = num_maps;
 636                 memset(f->file_map, 0, num_maps * sizeof(long));
 637         }
 638
 639         os_random_seed(seeds[3], &td->random_state);
 640         return 0;
 641 }
 642
 643 static void fill_cpu_mask(os_cpu_mask_t cpumask, int cpu)
 644 {
 645 #ifdef FIO_HAVE_CPU_AFFINITY
 646         unsigned int i;
 647
 648         CPU_ZERO(&cpumask);
 649
 650         for (i = 0; i < sizeof(int) * 8; i++) {
 651                 if ((1 << i) & cpu)
 652                         CPU_SET(i, &cpumask);
 653         }
 654 #endif
 655 }
 656
 657 static int is_empty_or_comment(char *line)
 658 {
 659         unsigned int i;
 660
 661         for (i = 0; i < strlen(line); i++) {
 662                 if (line[i] == ';')
 663                         return 1;
 664                 if (!isspace(line[i]) && !iscntrl(line[i]))
 665                         return 0;
 666         }
 667
 668         return 1;
 669 }
 670
 671 static int str_rw_cb(void *data, char *mem)
 672 {
 673         struct thread_data *td = data;
 674
 675         if (!strncmp(mem, "read", 4) || !strncmp(mem, "0", 1)) {
 676                 td->ddir = DDIR_READ;
 677                 td->sequential = 1;
 678                 return 0;
 679         } else if (!strncmp(mem, "randread", 8)) {
 680                 td->ddir = DDIR_READ;
 681                 td->sequential = 0;
 682                 return 0;
 683         } else if (!strncmp(mem, "write", 5) || !strncmp(mem, "1", 1)) {
 684                 td->ddir = DDIR_WRITE;
 685                 td->sequential = 1;
 686                 return 0;
 687         } else if (!strncmp(mem, "randwrite", 9)) {
 688                 td->ddir = DDIR_WRITE;
 689                 td->sequential = 0;
 690                 return 0;
 691         } else if (!strncmp(mem, "rw", 2)) {
 692                 td->ddir = 0;
 693                 td->iomix = 1;
 694                 td->sequential = 1;
 695                 return 0;
 696         } else if (!strncmp(mem, "randrw", 6)) {
 697                 td->ddir = 0;
 698                 td->iomix = 1;
 699                 td->sequential = 0;
 700                 return 0;
 701         }
 702
 703         log_err("fio: data direction: read, write, randread, randwrite, rw, randrw\n");
 704         return 1;
 705 }
 706
 707 static int str_verify_cb(void *data, char *mem)
 708 {
 709         struct thread_data *td = data;
 710
 711         if (!strncmp(mem, "0", 1)) {
 712                 td->verify = VERIFY_NONE;
 713                 return 0;
 714         } else if (!strncmp(mem, "md5", 3) || !strncmp(mem, "1", 1)) {
 715                 td->verify = VERIFY_MD5;
 716                 return 0;
 717         } else if (!strncmp(mem, "crc32", 5)) {
 718                 td->verify = VERIFY_CRC32;
 719                 return 0;
 720         }
 721
 722         log_err("fio: verify types: md5, crc32\n");
 723         return 1;
 724 }
 725
 726 static int str_mem_cb(void *data, char *mem)
 727 {
 728         struct thread_data *td = data;
 729
 730         if (!strncmp(mem, "malloc", 6)) {
 731                 td->mem_type = MEM_MALLOC;
 732                 return 0;
 733         } else if (!strncmp(mem, "shm", 3)) {
 734                 td->mem_type = MEM_SHM;
 735                 return 0;
 736         } else if (!strncmp(mem, "mmap", 4)) {
 737                 td->mem_type = MEM_MMAP;
 738                 return 0;
 739         }
 740
 741         log_err("fio: mem type: malloc, shm, mmap\n");
 742         return 1;
 743 }
 744
 745 static int str_ioengine_cb(void *data, char *str)
 746 {
 747         struct thread_data *td = data;
 748
 749         td->io_ops = load_ioengine(td, str);
 750         if (td->io_ops)
 751                 return 0;
 752
 753         log_err("fio: ioengine: { linuxaio, aio, libaio }, posixaio, sync, mmap, sgio, splice, cpu\n");
 754         return 1;
 755 }
 756
 757 static int str_lockmem_cb(void fio_unused *data, unsigned long *val)
 758 {
 759         mlock_size = *val;
 760         return 0;
 761 }
 762
 763 static int str_prioclass_cb(void *data, unsigned int *val)
 764 {
 765         struct thread_data *td = data;
 766
 767         td->ioprio |= *val << IOPRIO_CLASS_SHIFT;
 768         return 0;
 769 }
 770
 771 static int str_prio_cb(void *data, unsigned int *val)
 772 {
 773         struct thread_data *td = data;
 774
 775         td->ioprio |= *val;
 776         return 0;
 777 }
 778
 779 static int str_exitall_cb(void)
 780 {
 781         exitall_on_terminate = 1;
 782         return 0;
 783 }
 784
 785 static int str_cpumask_cb(void *data, unsigned int *val)
 786 {
 787         struct thread_data *td = data;
 788
 789         fill_cpu_mask(td->cpumask, *val);
 790         return 0;
 791 }
 792
 793 /*
 794  * This is our [ini] type file parser.
 795  */
 796 int parse_jobs_ini(char *file, int stonewall_flag)
 797 {
 798         unsigned int global;
 799         struct thread_data *td;
 800         char *string, *name, *tmpbuf;
 801         fpos_t off;
 802         FILE *f;
 803         char *p;
 804         int ret = 0, stonewall;
 805
 806         f = fopen(file, "r");
 807         if (!f) {
 808                 perror("fopen job file");
 809                 return 1;
 810         }
 811
 812         string = malloc(4096);
 813         name = malloc(256);
 814         tmpbuf = malloc(4096);
 815
 816         stonewall = stonewall_flag;
 817         while ((p = fgets(string, 4096, f)) != NULL) {
 818                 if (ret)
 819                         break;
 820                 if (is_empty_or_comment(p))
 821                         continue;
 822                 if (sscanf(p, "[%s]", name) != 1)
 823                         continue;
 824
 825                 global = !strncmp(name, "global", 6);
 826
 827                 name[strlen(name) - 1] = '\0';
 828
 829                 td = get_new_job(global, &def_thread);
 830                 if (!td) {
 831                         ret = 1;
 832                         break;
 833                 }
 834
 835                 /*
 836                  * Seperate multiple job files by a stonewall
 837                  */
 838                 if (!global && stonewall) {
 839                         td->stonewall = stonewall;
 840                         stonewall = 0;
 841                 }
 842
 843                 fgetpos(f, &off);
 844                 while ((p = fgets(string, 4096, f)) != NULL) {
 845                         if (is_empty_or_comment(p))
 846                                 continue;
 847                         if (strstr(p, "["))
 848                                 break;
 849
 850                         strip_blank_front(&p);
 851                         strip_blank_end(p);
 852
 853                         fgetpos(f, &off);
 854
 855                         /*
 856                          * Don't break here, continue parsing options so we
 857                          * dump all the bad ones. Makes trial/error fixups
 858                          * easier on the user.
 859                          */
 860                         ret = parse_option(p, options, td);
 861                 }
 862
 863                 if (!ret) {
 864                         fsetpos(f, &off);
 865                         ret = add_job(td, name, 0);
 866                 }
 867                 if (ret)
 868                         break;
 869         }
 870
 871         free(string);
 872         free(name);
 873         free(tmpbuf);
 874         fclose(f);
 875         return ret;
 876 }
 877
 878 static int fill_def_thread(void)
 879 {
 880         memset(&def_thread, 0, sizeof(def_thread));
 881
 882         if (fio_getaffinity(getpid(), &def_thread.cpumask) == -1) {
 883                 perror("sched_getaffinity");
 884                 return 1;
 885         }
 886
 887         /*
 888          * fill globals
 889          */
 890         def_thread.ddir = DDIR_READ;
 891         def_thread.iomix = 0;
 892         def_thread.bs = DEF_BS;
 893         def_thread.min_bs = -1;
 894         def_thread.max_bs = -1;
 895         def_thread.odirect = DEF_ODIRECT;
 896         def_thread.ratecycle = DEF_RATE_CYCLE;
 897         def_thread.sequential = DEF_SEQUENTIAL;
 898         def_thread.timeout = def_timeout;
 899         def_thread.overwrite = DEF_OVERWRITE;
 900         def_thread.invalidate_cache = DEF_INVALIDATE;
 901         def_thread.sync_io = DEF_SYNCIO;
 902         def_thread.mem_type = MEM_MALLOC;
 903         def_thread.bw_avg_time = DEF_BWAVGTIME;
 904         def_thread.create_serialize = DEF_CREATE_SER;
 905         def_thread.create_fsync = DEF_CREATE_FSYNC;
 906         def_thread.loops = DEF_LOOPS;
 907         def_thread.verify = DEF_VERIFY;
 908         def_thread.stonewall = DEF_STONEWALL;
 909         def_thread.numjobs = DEF_NUMJOBS;
 910         def_thread.use_thread = DEF_USE_THREAD;
 911         def_thread.rwmixcycle = DEF_RWMIX_CYCLE;
 912         def_thread.rwmixread = DEF_RWMIX_READ;
 913         def_thread.nice = DEF_NICE;
 914         def_thread.rand_repeatable = DEF_RAND_REPEAT;
 915         def_thread.nr_files = DEF_NR_FILES;
 916         def_thread.unlink = DEF_UNLINK;
 917         def_thread.write_bw_log = write_bw_log;
 918         def_thread.write_lat_log = write_lat_log;
 919 #ifdef FIO_HAVE_DISK_UTIL
 920         def_thread.do_disk_util = 1;
 921 #endif
 922
 923         return 0;
 924 }
 925
 926 static void usage(void)
 927 {
 928         printf("%s\n", fio_version_string);
 929         printf("\t-o Write output to file\n");
 930         printf("\t-t Runtime in seconds\n");
 931         printf("\t-l Generate per-job latency logs\n");
 932         printf("\t-w Generate per-job bandwidth logs\n");
 933         printf("\t-m Minimal (terse) output\n");
 934         printf("\t-v Print version info and exit\n");
 935 }
 936
 937 static int parse_cmd_line(int argc, char *argv[])
 938 {
 939         int c, idx = 1, ini_idx = 0;
 940
 941         while ((c = getopt(argc, argv, "t:o:lwvhm")) != EOF) {
 942                 switch (c) {
 943                         case 't':
 944                                 def_timeout = atoi(optarg);
 945                                 idx = optind;
 946                                 break;
 947                         case 'l':
 948                                 write_lat_log = 1;
 949                                 idx = optind;
 950                                 break;
 951                         case 'w':
 952                                 write_bw_log = 1;
 953                                 idx = optind;
 954                                 break;
 955                         case 'o':
 956                                 f_out = fopen(optarg, "w+");
 957                                 if (!f_out) {
 958                                         perror("fopen output");
 959                                         exit(1);
 960                                 }
 961                                 f_err = f_out;
 962                                 idx = optind;
 963                                 break;
 964                         case 'm':
 965                                 terse_output = 1;
 966                                 idx = optind;
 967                                 break;
 968                         case 'h':
 969                                 usage();
 970                                 exit(0);
 971                         case 'v':
 972                                 printf("%s\n", fio_version_string);
 973                                 exit(0);
 974                 }
 975         }
 976
 977         while (idx < argc) {
 978                 ini_idx++;
 979                 ini_file = realloc(ini_file, ini_idx * sizeof(char *));
 980                 ini_file[ini_idx - 1] = strdup(argv[idx]);
 981                 idx++;
 982         }
 983
 984         if (!f_out) {
 985                 f_out = stdout;
 986                 f_err = stderr;
 987         }
 988
 989         return ini_idx;
 990 }
 991
 992 static void free_shm(void)
 993 {
 994         struct shmid_ds sbuf;
 995
 996         if (threads) {
 997                 shmdt((void *) threads);
 998                 threads = NULL;
 999                 shmctl(shm_id, IPC_RMID, &sbuf);
1000         }
1001 }
1002
1003 /*
1004  * The thread area is shared between the main process and the job
1005  * threads/processes. So setup a shared memory segment that will hold
1006  * all the job info.
1007  */
1008 static int setup_thread_area(void)
1009 {
1010         /*
1011          * 1024 is too much on some machines, scale max_jobs if
1012          * we get a failure that looks like too large a shm segment
1013          */
1014         do {
1015                 size_t size = max_jobs * sizeof(struct thread_data);
1016
1017                 shm_id = shmget(0, size, IPC_CREAT | 0600);
1018                 if (shm_id != -1)
1019                         break;
1020                 if (errno != EINVAL) {
1021                         perror("shmget");
1022                         break;
1023                 }
1024
1025                 max_jobs >>= 1;
1026         } while (max_jobs);
1027
1028         if (shm_id == -1)
1029                 return 1;
1030
1031         threads = shmat(shm_id, NULL, 0);
1032         if (threads == (void *) -1) {
1033                 perror("shmat");
1034                 return 1;
1035         }
1036
1037         atexit(free_shm);
1038         return 0;
1039 }
1040
1041 int parse_options(int argc, char *argv[])
1042 {
1043         int job_files, i;
1044
1045         if (setup_thread_area())
1046                 return 1;
1047         if (fill_def_thread())
1048                 return 1;
1049
1050         job_files = parse_cmd_line(argc, argv);
1051         if (!job_files) {
1052                 log_err("Need job file(s)\n");
1053                 usage();
1054                 return 1;
1055         }
1056
1057         for (i = 0; i < job_files; i++) {
1058                 if (fill_def_thread())
1059                         return 1;
1060                 if (parse_jobs_ini(ini_file[i], i))
1061                         return 1;
1062                 free(ini_file[i]);
1063         }
1064
1065         free(ini_file);
1066         return 0;
1067 }