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),
 108         },
 109         {
 110                 .name   = "iolog",
 111                 .type   = FIO_OPT_STR_STORE,
 112                 .off1   = td_var_offset(iolog),
 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 static void fixup_options(struct thread_data *td)
 395 {
 396         if (!td->min_bs)
 397                 td->min_bs = td->bs;
 398         if (!td->max_bs)
 399                 td->max_bs = td->bs;
 400
 401         if (!td->rwmixread && td->rwmixwrite)
 402                 td->rwmixread = 100 - td->rwmixwrite;
 403 }
 404
 405 /*
 406  * Adds a job to the list of things todo. Sanitizes the various options
 407  * to make sure we don't have conflicts, and initializes various
 408  * members of td.
 409  */
 410 static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
 411 {
 412         char *ddir_str[] = { "read", "write", "randread", "randwrite",
 413                              "rw", NULL, "randrw" };
 414         struct stat sb;
 415         int numjobs, ddir, i;
 416         struct fio_file *f;
 417
 418 #ifndef FIO_HAVE_LIBAIO
 419         if (td->io_engine == FIO_LIBAIO) {
 420                 log_err("Linux libaio not available\n");
 421                 return 1;
 422         }
 423 #endif
 424 #ifndef FIO_HAVE_POSIXAIO
 425         if (td->io_engine == FIO_POSIXAIO) {
 426                 log_err("posix aio not available\n");
 427                 return 1;
 428         }
 429 #endif
 430
 431         fixup_options(td);
 432
 433         /*
 434          * the def_thread is just for options, it's not a real job
 435          */
 436         if (td == &def_thread)
 437                 return 0;
 438
 439         /*
 440          * Set default io engine, if none set
 441          */
 442         if (!td->io_ops) {
 443                 td->io_ops = load_ioengine(td, DEF_IO_ENGINE_NAME);
 444                 if (!td->io_ops) {
 445                         log_err("default engine %s not there?\n", DEF_IO_ENGINE_NAME);
 446                         return 1;
 447                 }
 448         }
 449
 450         if (td->io_ops->flags & FIO_SYNCIO)
 451                 td->iodepth = 1;
 452         else {
 453                 if (!td->iodepth)
 454                         td->iodepth = td->nr_files;
 455         }
 456
 457         /*
 458          * only really works for sequential io for now, and with 1 file
 459          */
 460         if (td->zone_size && !td->sequential && td->nr_files == 1)
 461                 td->zone_size = 0;
 462
 463         /*
 464          * Reads can do overwrites, we always need to pre-create the file
 465          */
 466         if (td_read(td) || td_rw(td))
 467                 td->overwrite = 1;
 468
 469         td->filetype = FIO_TYPE_FILE;
 470         if (!stat(jobname, &sb)) {
 471                 if (S_ISBLK(sb.st_mode))
 472                         td->filetype = FIO_TYPE_BD;
 473                 else if (S_ISCHR(sb.st_mode))
 474                         td->filetype = FIO_TYPE_CHAR;
 475         }
 476
 477         if (td->odirect)
 478                 td->io_ops->flags |= FIO_RAWIO;
 479
 480         if (td->filename)
 481                 td->nr_uniq_files = 1;
 482         else
 483                 td->nr_uniq_files = td->nr_files;
 484
 485         if (td->filetype == FIO_TYPE_FILE || td->filename) {
 486                 char tmp[PATH_MAX];
 487                 int len = 0;
 488                 int i;
 489
 490                 if (td->directory && td->directory[0] != '\0')
 491                         sprintf(tmp, "%s/", td->directory);
 492
 493                 td->files = malloc(sizeof(struct fio_file) * td->nr_files);
 494
 495                 for_each_file(td, f, i) {
 496                         memset(f, 0, sizeof(*f));
 497                         f->fd = -1;
 498
 499                         if (td->filename)
 500                                 sprintf(tmp + len, "%s", td->filename);
 501                         else
 502                                 sprintf(tmp + len, "%s.%d.%d", jobname, td->thread_number, i);
 503                         f->file_name = strdup(tmp);
 504                 }
 505         } else {
 506                 td->nr_files = 1;
 507                 td->files = malloc(sizeof(struct fio_file));
 508                 f = &td->files[0];
 509
 510                 memset(f, 0, sizeof(*f));
 511                 f->fd = -1;
 512                 f->file_name = strdup(jobname);
 513         }
 514
 515         for_each_file(td, f, i) {
 516                 f->file_size = td->total_file_size / td->nr_files;
 517                 f->file_offset = td->start_offset;
 518         }
 519
 520         fio_sem_init(&td->mutex, 0);
 521
 522         td->clat_stat[0].min_val = td->clat_stat[1].min_val = ULONG_MAX;
 523         td->slat_stat[0].min_val = td->slat_stat[1].min_val = ULONG_MAX;
 524         td->bw_stat[0].min_val = td->bw_stat[1].min_val = ULONG_MAX;
 525
 526         if (td->min_bs == -1U)
 527                 td->min_bs = td->bs;
 528         if (td->max_bs == -1U)
 529                 td->max_bs = td->bs;
 530         if (td_read(td) && !td_rw(td))
 531                 td->verify = 0;
 532
 533         if (td->stonewall && td->thread_number > 1)
 534                 groupid++;
 535
 536         td->groupid = groupid;
 537
 538         if (setup_rate(td))
 539                 goto err;
 540
 541         if (td->write_lat_log) {
 542                 setup_log(&td->slat_log);
 543                 setup_log(&td->clat_log);
 544         }
 545         if (td->write_bw_log)
 546                 setup_log(&td->bw_log);
 547
 548         if (td->name[0] == '\0')
 549                 snprintf(td->name, sizeof(td->name)-1, "client%d", td->thread_number);
 550
 551         ddir = td->ddir + (!td->sequential << 1) + (td->iomix << 2);
 552
 553         if (!terse_output) {
 554                 if (!job_add_num) {
 555                         if (td->io_ops->flags & FIO_CPUIO)
 556                                 fprintf(f_out, "%s: ioengine=cpu, cpuload=%u, cpucycle=%u\n", td->name, td->cpuload, td->cpucycle);
 557                         else
 558                                 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);
 559                 } else if (job_add_num == 1)
 560                         fprintf(f_out, "...\n");
 561         }
 562
 563         /*
 564          * recurse add identical jobs, clear numjobs and stonewall options
 565          * as they don't apply to sub-jobs
 566          */
 567         numjobs = td->numjobs;
 568         while (--numjobs) {
 569                 struct thread_data *td_new = get_new_job(0, td);
 570
 571                 if (!td_new)
 572                         goto err;
 573
 574                 td_new->numjobs = 1;
 575                 td_new->stonewall = 0;
 576                 job_add_num = numjobs - 1;
 577
 578                 if (add_job(td_new, jobname, job_add_num))
 579                         goto err;
 580         }
 581         return 0;
 582 err:
 583         put_job(td);
 584         return -1;
 585 }
 586
 587 /*
 588  * Initialize the various random states we need (random io, block size ranges,
 589  * read/write mix, etc).
 590  */
 591 int init_random_state(struct thread_data *td)
 592 {
 593         unsigned long seeds[4];
 594         int fd, num_maps, blocks, i;
 595         struct fio_file *f;
 596
 597         fd = open("/dev/urandom", O_RDONLY);
 598         if (fd == -1) {
 599                 td_verror(td, errno);
 600                 return 1;
 601         }
 602
 603         if (read(fd, seeds, sizeof(seeds)) < (int) sizeof(seeds)) {
 604                 td_verror(td, EIO);
 605                 close(fd);
 606                 return 1;
 607         }
 608
 609         close(fd);
 610
 611         os_random_seed(seeds[0], &td->bsrange_state);
 612         os_random_seed(seeds[1], &td->verify_state);
 613         os_random_seed(seeds[2], &td->rwmix_state);
 614
 615         if (td->sequential)
 616                 return 0;
 617
 618         if (td->rand_repeatable)
 619                 seeds[3] = DEF_RANDSEED;
 620
 621         for_each_file(td, f, i) {
 622                 blocks = (f->file_size + td->min_bs - 1) / td->min_bs;
 623                 num_maps = blocks / BLOCKS_PER_MAP;
 624                 f->file_map = malloc(num_maps * sizeof(long));
 625                 f->num_maps = num_maps;
 626                 memset(f->file_map, 0, num_maps * sizeof(long));
 627         }
 628
 629         os_random_seed(seeds[3], &td->random_state);
 630         return 0;
 631 }
 632
 633 static void fill_cpu_mask(os_cpu_mask_t cpumask, int cpu)
 634 {
 635 #ifdef FIO_HAVE_CPU_AFFINITY
 636         unsigned int i;
 637
 638         CPU_ZERO(&cpumask);
 639
 640         for (i = 0; i < sizeof(int) * 8; i++) {
 641                 if ((1 << i) & cpu)
 642                         CPU_SET(i, &cpumask);
 643         }
 644 #endif
 645 }
 646
 647 static int is_empty_or_comment(char *line)
 648 {
 649         unsigned int i;
 650
 651         for (i = 0; i < strlen(line); i++) {
 652                 if (line[i] == ';')
 653                         return 1;
 654                 if (!isspace(line[i]) && !iscntrl(line[i]))
 655                         return 0;
 656         }
 657
 658         return 1;
 659 }
 660
 661 static int str_rw_cb(void *data, char *mem)
 662 {
 663         struct thread_data *td = data;
 664
 665         if (!strncmp(mem, "read", 4) || !strncmp(mem, "0", 1)) {
 666                 td->ddir = DDIR_READ;
 667                 td->sequential = 1;
 668                 return 0;
 669         } else if (!strncmp(mem, "randread", 8)) {
 670                 td->ddir = DDIR_READ;
 671                 td->sequential = 0;
 672                 return 0;
 673         } else if (!strncmp(mem, "write", 5) || !strncmp(mem, "1", 1)) {
 674                 td->ddir = DDIR_WRITE;
 675                 td->sequential = 1;
 676                 return 0;
 677         } else if (!strncmp(mem, "randwrite", 9)) {
 678                 td->ddir = DDIR_WRITE;
 679                 td->sequential = 0;
 680                 return 0;
 681         } else if (!strncmp(mem, "rw", 2)) {
 682                 td->ddir = 0;
 683                 td->iomix = 1;
 684                 td->sequential = 1;
 685                 return 0;
 686         } else if (!strncmp(mem, "randrw", 6)) {
 687                 td->ddir = 0;
 688                 td->iomix = 1;
 689                 td->sequential = 0;
 690                 return 0;
 691         }
 692
 693         log_err("fio: data direction: read, write, randread, randwrite, rw, randrw\n");
 694         return 1;
 695 }
 696
 697 static int str_verify_cb(void *data, char *mem)
 698 {
 699         struct thread_data *td = data;
 700
 701         if (!strncmp(mem, "0", 1)) {
 702                 td->verify = VERIFY_NONE;
 703                 return 0;
 704         } else if (!strncmp(mem, "md5", 3) || !strncmp(mem, "1", 1)) {
 705                 td->verify = VERIFY_MD5;
 706                 return 0;
 707         } else if (!strncmp(mem, "crc32", 5)) {
 708                 td->verify = VERIFY_CRC32;
 709                 return 0;
 710         }
 711
 712         log_err("fio: verify types: md5, crc32\n");
 713         return 1;
 714 }
 715
 716 static int str_mem_cb(void *data, char *mem)
 717 {
 718         struct thread_data *td = data;
 719
 720         if (!strncmp(mem, "malloc", 6)) {
 721                 td->mem_type = MEM_MALLOC;
 722                 return 0;
 723         } else if (!strncmp(mem, "shm", 3)) {
 724                 td->mem_type = MEM_SHM;
 725                 return 0;
 726         } else if (!strncmp(mem, "mmap", 4)) {
 727                 td->mem_type = MEM_MMAP;
 728                 return 0;
 729         }
 730
 731         log_err("fio: mem type: malloc, shm, mmap\n");
 732         return 1;
 733 }
 734
 735 static int str_ioengine_cb(void *data, char *str)
 736 {
 737         struct thread_data *td = data;
 738
 739         td->io_ops = load_ioengine(td, str);
 740         if (td->io_ops)
 741                 return 0;
 742
 743         log_err("fio: ioengine: { linuxaio, aio, libaio }, posixaio, sync, mmap, sgio, splice, cpu\n");
 744         return 1;
 745 }
 746
 747 static int str_lockmem_cb(void fio_unused *data, unsigned long *val)
 748 {
 749         mlock_size = *val;
 750         return 0;
 751 }
 752
 753 static int str_prioclass_cb(void *data, unsigned int *val)
 754 {
 755         struct thread_data *td = data;
 756
 757         td->ioprio |= *val << IOPRIO_CLASS_SHIFT;
 758         return 0;
 759 }
 760
 761 static int str_prio_cb(void *data, unsigned int *val)
 762 {
 763         struct thread_data *td = data;
 764
 765         td->ioprio |= *val;
 766         return 0;
 767 }
 768
 769 static int str_exitall_cb(void)
 770 {
 771         exitall_on_terminate = 1;
 772         return 0;
 773 }
 774
 775 static int str_cpumask_cb(void *data, unsigned int *val)
 776 {
 777         struct thread_data *td = data;
 778
 779         fill_cpu_mask(td->cpumask, *val);
 780         return 0;
 781 }
 782
 783 /*
 784  * This is our [ini] type file parser.
 785  */
 786 int parse_jobs_ini(char *file, int stonewall_flag)
 787 {
 788         unsigned int global;
 789         struct thread_data *td;
 790         char *string, *name, *tmpbuf;
 791         fpos_t off;
 792         FILE *f;
 793         char *p;
 794         int ret = 0, stonewall;
 795
 796         f = fopen(file, "r");
 797         if (!f) {
 798                 perror("fopen job file");
 799                 return 1;
 800         }
 801
 802         string = malloc(4096);
 803         name = malloc(256);
 804         tmpbuf = malloc(4096);
 805
 806         stonewall = stonewall_flag;
 807         while ((p = fgets(string, 4096, f)) != NULL) {
 808                 if (ret)
 809                         break;
 810                 if (is_empty_or_comment(p))
 811                         continue;
 812                 if (sscanf(p, "[%s]", name) != 1)
 813                         continue;
 814
 815                 global = !strncmp(name, "global", 6);
 816
 817                 name[strlen(name) - 1] = '\0';
 818
 819                 td = get_new_job(global, &def_thread);
 820                 if (!td) {
 821                         ret = 1;
 822                         break;
 823                 }
 824
 825                 /*
 826                  * Seperate multiple job files by a stonewall
 827                  */
 828                 if (!global && stonewall) {
 829                         td->stonewall = stonewall;
 830                         stonewall = 0;
 831                 }
 832
 833                 fgetpos(f, &off);
 834                 while ((p = fgets(string, 4096, f)) != NULL) {
 835                         if (is_empty_or_comment(p))
 836                                 continue;
 837                         if (strstr(p, "["))
 838                                 break;
 839
 840                         strip_blank_front(&p);
 841                         strip_blank_end(p);
 842
 843                         fgetpos(f, &off);
 844
 845                         /*
 846                          * Don't break here, continue parsing options so we
 847                          * dump all the bad ones. Makes trial/error fixups
 848                          * easier on the user.
 849                          */
 850                         ret = parse_option(p, options, td);
 851                 }
 852
 853                 if (!ret) {
 854                         fsetpos(f, &off);
 855                         ret = add_job(td, name, 0);
 856                 }
 857                 if (ret)
 858                         break;
 859         }
 860
 861         free(string);
 862         free(name);
 863         free(tmpbuf);
 864         fclose(f);
 865         return ret;
 866 }
 867
 868 static int fill_def_thread(void)
 869 {
 870         memset(&def_thread, 0, sizeof(def_thread));
 871
 872         if (fio_getaffinity(getpid(), &def_thread.cpumask) == -1) {
 873                 perror("sched_getaffinity");
 874                 return 1;
 875         }
 876
 877         /*
 878          * fill globals
 879          */
 880         def_thread.ddir = DDIR_READ;
 881         def_thread.iomix = 0;
 882         def_thread.bs = DEF_BS;
 883         def_thread.min_bs = -1;
 884         def_thread.max_bs = -1;
 885         def_thread.odirect = DEF_ODIRECT;
 886         def_thread.ratecycle = DEF_RATE_CYCLE;
 887         def_thread.sequential = DEF_SEQUENTIAL;
 888         def_thread.timeout = def_timeout;
 889         def_thread.overwrite = DEF_OVERWRITE;
 890         def_thread.invalidate_cache = DEF_INVALIDATE;
 891         def_thread.sync_io = DEF_SYNCIO;
 892         def_thread.mem_type = MEM_MALLOC;
 893         def_thread.bw_avg_time = DEF_BWAVGTIME;
 894         def_thread.create_serialize = DEF_CREATE_SER;
 895         def_thread.create_fsync = DEF_CREATE_FSYNC;
 896         def_thread.loops = DEF_LOOPS;
 897         def_thread.verify = DEF_VERIFY;
 898         def_thread.stonewall = DEF_STONEWALL;
 899         def_thread.numjobs = DEF_NUMJOBS;
 900         def_thread.use_thread = DEF_USE_THREAD;
 901         def_thread.rwmixcycle = DEF_RWMIX_CYCLE;
 902         def_thread.rwmixread = DEF_RWMIX_READ;
 903         def_thread.nice = DEF_NICE;
 904         def_thread.rand_repeatable = DEF_RAND_REPEAT;
 905         def_thread.nr_files = DEF_NR_FILES;
 906         def_thread.unlink = DEF_UNLINK;
 907         def_thread.write_bw_log = write_bw_log;
 908         def_thread.write_lat_log = write_lat_log;
 909 #ifdef FIO_HAVE_DISK_UTIL
 910         def_thread.do_disk_util = 1;
 911 #endif
 912
 913         return 0;
 914 }
 915
 916 static void usage(void)
 917 {
 918         printf("%s\n", fio_version_string);
 919         printf("\t-o Write output to file\n");
 920         printf("\t-t Runtime in seconds\n");
 921         printf("\t-l Generate per-job latency logs\n");
 922         printf("\t-w Generate per-job bandwidth logs\n");
 923         printf("\t-m Minimal (terse) output\n");
 924         printf("\t-v Print version info and exit\n");
 925 }
 926
 927 static int parse_cmd_line(int argc, char *argv[])
 928 {
 929         int c, idx = 1, ini_idx = 0;
 930
 931         while ((c = getopt(argc, argv, "t:o:lwvhm")) != EOF) {
 932                 switch (c) {
 933                         case 't':
 934                                 def_timeout = atoi(optarg);
 935                                 idx = optind;
 936                                 break;
 937                         case 'l':
 938                                 write_lat_log = 1;
 939                                 idx = optind;
 940                                 break;
 941                         case 'w':
 942                                 write_bw_log = 1;
 943                                 idx = optind;
 944                                 break;
 945                         case 'o':
 946                                 f_out = fopen(optarg, "w+");
 947                                 if (!f_out) {
 948                                         perror("fopen output");
 949                                         exit(1);
 950                                 }
 951                                 f_err = f_out;
 952                                 idx = optind;
 953                                 break;
 954                         case 'm':
 955                                 terse_output = 1;
 956                                 idx = optind;
 957                                 break;
 958                         case 'h':
 959                                 usage();
 960                                 exit(0);
 961                         case 'v':
 962                                 printf("%s\n", fio_version_string);
 963                                 exit(0);
 964                 }
 965         }
 966
 967         while (idx < argc) {
 968                 ini_idx++;
 969                 ini_file = realloc(ini_file, ini_idx * sizeof(char *));
 970                 ini_file[ini_idx - 1] = strdup(argv[idx]);
 971                 idx++;
 972         }
 973
 974         if (!f_out) {
 975                 f_out = stdout;
 976                 f_err = stderr;
 977         }
 978
 979         return ini_idx;
 980 }
 981
 982 static void free_shm(void)
 983 {
 984         struct shmid_ds sbuf;
 985
 986         if (threads) {
 987                 shmdt((void *) threads);
 988                 threads = NULL;
 989                 shmctl(shm_id, IPC_RMID, &sbuf);
 990         }
 991 }
 992
 993 /*
 994  * The thread area is shared between the main process and the job
 995  * threads/processes. So setup a shared memory segment that will hold
 996  * all the job info.
 997  */
 998 static int setup_thread_area(void)
 999 {
1000         /*
1001          * 1024 is too much on some machines, scale max_jobs if
1002          * we get a failure that looks like too large a shm segment
1003          */
1004         do {
1005                 size_t size = max_jobs * sizeof(struct thread_data);
1006
1007                 shm_id = shmget(0, size, IPC_CREAT | 0600);
1008                 if (shm_id != -1)
1009                         break;
1010                 if (errno != EINVAL) {
1011                         perror("shmget");
1012                         break;
1013                 }
1014
1015                 max_jobs >>= 1;
1016         } while (max_jobs);
1017
1018         if (shm_id == -1)
1019                 return 1;
1020
1021         threads = shmat(shm_id, NULL, 0);
1022         if (threads == (void *) -1) {
1023                 perror("shmat");
1024                 return 1;
1025         }
1026
1027         atexit(free_shm);
1028         return 0;
1029 }
1030
1031 int parse_options(int argc, char *argv[])
1032 {
1033         int job_files, i;
1034
1035         if (setup_thread_area())
1036                 return 1;
1037         if (fill_def_thread())
1038                 return 1;
1039
1040         job_files = parse_cmd_line(argc, argv);
1041         if (!job_files) {
1042                 log_err("Need job file(s)\n");
1043                 usage();
1044                 return 1;
1045         }
1046
1047         for (i = 0; i < job_files; i++) {
1048                 if (fill_def_thread())
1049                         return 1;
1050                 if (parse_jobs_ini(ini_file[i], i))
1051                         return 1;
1052                 free(ini_file[i]);
1053         }
1054
1055         free(ini_file);
1056         return 0;
1057 }