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Sourcecode: fio version File versions

init.c

/*
 * This file contains job initialization and setup functions.
 */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <ctype.h>
#include <string.h>
#include <errno.h>
#include <getopt.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/types.h>
#include <sys/stat.h>

#include "fio.h"
#include "parse.h"
#include "smalloc.h"
#include "filehash.h"
#include "verify.h"

static char fio_version_string[] = "fio 1.32";

#define FIO_RANDSEED          (0xb1899bedUL)

static char **ini_file;
static int max_jobs = MAX_JOBS;
static int dump_cmdline;

static struct thread_data def_thread;
struct thread_data *threads = NULL;

int exitall_on_terminate = 0;
int terse_output = 0;
int eta_print;
unsigned long long mlock_size = 0;
FILE *f_out = NULL;
FILE *f_err = NULL;
char *job_section = NULL;

int write_bw_log = 0;
int read_only = 0;

static int def_timeout;
static int write_lat_log;

static int prev_group_jobs;

unsigned long fio_debug = 0;
unsigned int fio_debug_jobno = -1;
unsigned int *fio_debug_jobp = NULL;

/*
 * Command line options. These will contain the above, plus a few
 * extra that only pertain to fio itself and not jobs.
 */
static struct option l_opts[FIO_NR_OPTIONS] = {
      {
            .name       = "output",
            .has_arg    = required_argument,
            .val        = 'o',
      },
      {
            .name       = "timeout",
            .has_arg    = required_argument,
            .val        = 't',
      },
      {
            .name       = "latency-log",
            .has_arg    = required_argument,
            .val        = 'l',
      },
      {
            .name       = "bandwidth-log",
            .has_arg    = required_argument,
            .val        = 'b',
      },
      {
            .name       = "minimal",
            .has_arg    = optional_argument,
            .val        = 'm',
      },
      {
            .name       = "version",
            .has_arg    = no_argument,
            .val        = 'v',
      },
      {
            .name       = "help",
            .has_arg    = no_argument,
            .val        = 'h',
      },
      {
            .name       = "cmdhelp",
            .has_arg    = optional_argument,
            .val        = 'c',
      },
      {
            .name       = "showcmd",
            .has_arg    = no_argument,
            .val        = 's',
      },
      {
            .name       = "readonly",
            .has_arg    = no_argument,
            .val        = 'r',
      },
      {
            .name       = "eta",
            .has_arg    = required_argument,
            .val        = 'e',
      },
      {
            .name       = "debug",
            .has_arg    = required_argument,
            .val        = 'd',
      },
      {
            .name       = "section",
            .has_arg    = required_argument,
            .val        = 'x',
      },
      {
            .name       = "alloc-size",
            .has_arg    = required_argument,
            .val        = 'a',
      },
      {
            .name       = NULL,
      },
};

FILE *get_f_out()
{
      return f_out;
}

FILE *get_f_err()
{
      return f_err;
}

/*
 * Return a free job structure.
 */
static struct thread_data *get_new_job(int global, struct thread_data *parent)
{
      struct thread_data *td;

      if (global)
            return &def_thread;
      if (thread_number >= max_jobs)
            return NULL;

      td = &threads[thread_number++];
      *td = *parent;

      dup_files(td, parent);
      options_mem_dupe(td);

      td->thread_number = thread_number;
      return td;
}

static void put_job(struct thread_data *td)
{
      if (td == &def_thread)
            return;

      if (td->error)
            log_info("fio: %s\n", td->verror);

      memset(&threads[td->thread_number - 1], 0, sizeof(*td));
      thread_number--;
}

static int __setup_rate(struct thread_data *td, enum fio_ddir ddir)
{
      unsigned int bs = td->o.min_bs[ddir];
      unsigned long long rate;
      unsigned long ios_per_msec;

      if (td->o.rate[ddir]) {
            rate = td->o.rate[ddir];
            ios_per_msec = (rate * 1000LL) / bs;
      } else
            ios_per_msec = td->o.rate_iops[ddir] * 1000UL;

      if (!ios_per_msec) {
            log_err("rate lower than supported\n");
            return -1;
      }

      td->rate_usec_cycle[ddir] = 1000000000ULL / ios_per_msec;
      td->rate_pending_usleep[ddir] = 0;
      return 0;
}

static int setup_rate(struct thread_data *td)
{
      int ret = 0;

      if (td->o.rate[DDIR_READ] || td->o.rate_iops[DDIR_READ])
            ret = __setup_rate(td, DDIR_READ);
      if (td->o.rate[DDIR_WRITE] || td->o.rate_iops[DDIR_WRITE])
            ret |= __setup_rate(td, DDIR_WRITE);

      return ret;
}

static int fixed_block_size(struct thread_options *o)
{
      return o->min_bs[DDIR_READ] == o->max_bs[DDIR_READ] &&
            o->min_bs[DDIR_WRITE] == o->max_bs[DDIR_WRITE] &&
            o->min_bs[DDIR_READ] == o->min_bs[DDIR_WRITE];
}

/*
 * Lazy way of fixing up options that depend on each other. We could also
 * define option callback handlers, but this is easier.
 */
static int fixup_options(struct thread_data *td)
{
      struct thread_options *o = &td->o;

#ifndef FIO_HAVE_PSHARED_MUTEX
      if (!td->o.use_thread) {
            log_info("fio: this platform does not support process shared"
                   " mutexes, forcing use of threads. Use the 'thread'"
                   " option to get rid of this warning.\n");
            td->o.use_thread = 1;
      }
#endif

      if (o->write_iolog_file && o->read_iolog_file) {
            log_err("fio: read iolog overrides write_iolog\n");
            free(o->write_iolog_file);
            o->write_iolog_file = NULL;
      }

      /*
       * only really works for sequential io for now, and with 1 file
       */
      if (o->zone_size && td_random(td) && o->open_files == 1)
            o->zone_size = 0;

      /*
       * Reads can do overwrites, we always need to pre-create the file
       */
      if (td_read(td) || td_rw(td))
            o->overwrite = 1;

      if (!o->min_bs[DDIR_READ])
            o->min_bs[DDIR_READ] = o->bs[DDIR_READ];
      if (!o->max_bs[DDIR_READ])
            o->max_bs[DDIR_READ] = o->bs[DDIR_READ];
      if (!o->min_bs[DDIR_WRITE])
            o->min_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
      if (!o->max_bs[DDIR_WRITE])
            o->max_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];

      o->rw_min_bs = min(o->min_bs[DDIR_READ], o->min_bs[DDIR_WRITE]);

      /*
       * For random IO, allow blockalign offset other than min_bs.
       */
      if (!o->ba[DDIR_READ] || !td_random(td))
            o->ba[DDIR_READ] = o->min_bs[DDIR_READ];
      if (!o->ba[DDIR_WRITE] || !td_random(td))
            o->ba[DDIR_WRITE] = o->min_bs[DDIR_WRITE];

      if ((o->ba[DDIR_READ] != o->min_bs[DDIR_READ] ||
          o->ba[DDIR_WRITE] != o->min_bs[DDIR_WRITE]) &&
          !td->o.norandommap) {
            log_err("fio: Any use of blockalign= turns off randommap\n");
            td->o.norandommap = 1;
      }

      if (!o->file_size_high)
            o->file_size_high = o->file_size_low;

      if (o->norandommap && o->verify != VERIFY_NONE
          && !fixed_block_size(o))  {
            log_err("fio: norandommap given for variable block sizes, "
                  "verify disabled\n");
            o->verify = VERIFY_NONE;
      }
      if (o->bs_unaligned && (o->odirect || td->io_ops->flags & FIO_RAWIO))
            log_err("fio: bs_unaligned may not work with raw io\n");

      /*
       * thinktime_spin must be less than thinktime
       */
      if (o->thinktime_spin > o->thinktime)
            o->thinktime_spin = o->thinktime;

      /*
       * The low water mark cannot be bigger than the iodepth
       */
      if (o->iodepth_low > o->iodepth || !o->iodepth_low) {
            /*
             * syslet work around - if the workload is sequential,
             * we want to let the queue drain all the way down to
             * avoid seeking between async threads
             */
            if (!strcmp(td->io_ops->name, "syslet-rw") && !td_random(td))
                  o->iodepth_low = 1;
            else
                  o->iodepth_low = o->iodepth;
      }

      /*
       * If batch number isn't set, default to the same as iodepth
       */
      if (o->iodepth_batch > o->iodepth || !o->iodepth_batch)
            o->iodepth_batch = o->iodepth;

      if (o->nr_files > td->files_index)
            o->nr_files = td->files_index;

      if (o->open_files > o->nr_files || !o->open_files)
            o->open_files = o->nr_files;

      if (((o->rate[0] + o->rate[1]) && (o->rate_iops[0] + o->rate_iops[1]))||
          ((o->ratemin[0] + o->ratemin[1]) && (o->rate_iops_min[0] +
            o->rate_iops_min[1]))) {
            log_err("fio: rate and rate_iops are mutually exclusive\n");
            return 1;
      }
      if ((o->rate[0] < o->ratemin[0]) || (o->rate[1] < o->ratemin[1]) ||
          (o->rate_iops[0] < o->rate_iops_min[0]) ||
          (o->rate_iops[1] < o->rate_iops_min[1])) {
            log_err("fio: minimum rate exceeds rate\n");
            return 1;
      }

      if (!o->timeout && o->time_based) {
            log_err("fio: time_based requires a runtime/timeout setting\n");
            o->time_based = 0;
      }

      if (o->fill_device && !o->size)
            o->size = -1ULL;

      if (td_rw(td) && td->o.verify != VERIFY_NONE)
            log_info("fio: mixed read/write workload with verify. May not "
             "work as expected, unless you pre-populated the file\n");

      if (td->o.verify != VERIFY_NONE)
            td->o.refill_buffers = 1;

      if (td->o.pre_read) {
            td->o.invalidate_cache = 0;
            if (td->io_ops->flags & FIO_PIPEIO)
                  log_info("fio: cannot pre-read files with an IO engine"
                         " that isn't seekable. Pre-read disabled.\n");
      }

      return 0;
}

/*
 * This function leaks the buffer
 */
static char *to_kmg(unsigned int val)
{
      char *buf = malloc(32);
      char post[] = { 0, 'K', 'M', 'G', 'P', 'E', 0 };
      char *p = post;

      do {
            if (val & 1023)
                  break;

            val >>= 10;
            p++;
      } while (*p);

      snprintf(buf, 31, "%u%c", val, *p);
      return buf;
}

/* External engines are specified by "external:name.o") */
static const char *get_engine_name(const char *str)
{
      char *p = strstr(str, ":");

      if (!p)
            return str;

      p++;
      strip_blank_front(&p);
      strip_blank_end(p);
      return p;
}

static int exists_and_not_file(const char *filename)
{
      struct stat sb;

      if (lstat(filename, &sb) == -1)
            return 0;

      if (S_ISREG(sb.st_mode))
            return 0;

      return 1;
}

void td_fill_rand_seeds(struct thread_data *td)
{
      os_random_seed(td->rand_seeds[0], &td->bsrange_state);
      os_random_seed(td->rand_seeds[1], &td->verify_state);
      os_random_seed(td->rand_seeds[2], &td->rwmix_state);

      if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
            os_random_seed(td->rand_seeds[3], &td->next_file_state);

      os_random_seed(td->rand_seeds[5], &td->file_size_state);

      if (!td_random(td))
            return;

      if (td->o.rand_repeatable)
            td->rand_seeds[4] = FIO_RANDSEED * td->thread_number;

      os_random_seed(td->rand_seeds[4], &td->random_state);
}

/*
 * Initialize the various random states we need (random io, block size ranges,
 * read/write mix, etc).
 */
static int init_random_state(struct thread_data *td)
{
      int fd;

      fd = open("/dev/urandom", O_RDONLY);
      if (fd == -1) {
            td_verror(td, errno, "open");
            return 1;
      }

      if (read(fd, td->rand_seeds, sizeof(td->rand_seeds)) <
          (int) sizeof(td->rand_seeds)) {
            td_verror(td, EIO, "read");
            close(fd);
            return 1;
      }

      close(fd);
      td_fill_rand_seeds(td);
      return 0;
}

/*
 * Adds a job to the list of things todo. Sanitizes the various options
 * to make sure we don't have conflicts, and initializes various
 * members of td.
 */
static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
{
      const char *ddir_str[] = { NULL, "read", "write", "rw", NULL,
                           "randread", "randwrite", "randrw" };
      unsigned int i;
      const char *engine;
      char fname[PATH_MAX];
      int numjobs, file_alloced;

      /*
       * the def_thread is just for options, it's not a real job
       */
      if (td == &def_thread)
            return 0;

      /*
       * if we are just dumping the output command line, don't add the job
       */
      if (dump_cmdline) {
            put_job(td);
            return 0;
      }

      engine = get_engine_name(td->o.ioengine);
      td->io_ops = load_ioengine(td, engine);
      if (!td->io_ops) {
            log_err("fio: failed to load engine %s\n", engine);
            goto err;
      }

      if (td->o.use_thread)
            nr_thread++;
      else
            nr_process++;

      if (td->o.odirect)
            td->io_ops->flags |= FIO_RAWIO;

      file_alloced = 0;
      if (!td->o.filename && !td->files_index && !td->o.read_iolog_file) {
            file_alloced = 1;

            if (td->o.nr_files == 1 && exists_and_not_file(jobname))
                  add_file(td, jobname);
            else {
                  for (i = 0; i < td->o.nr_files; i++) {
                        sprintf(fname, "%s.%d.%d", jobname,
                                          td->thread_number, i);
                        add_file(td, fname);
                  }
            }
      }

      if (fixup_options(td))
            goto err;

      if (td->io_ops->flags & FIO_DISKLESSIO) {
            struct fio_file *f;

            for_each_file(td, f, i)
                  f->real_file_size = -1ULL;
      }

      td->mutex = fio_mutex_init(0);

      td->ts.clat_stat[0].min_val = td->ts.clat_stat[1].min_val = ULONG_MAX;
      td->ts.slat_stat[0].min_val = td->ts.slat_stat[1].min_val = ULONG_MAX;
      td->ts.bw_stat[0].min_val = td->ts.bw_stat[1].min_val = ULONG_MAX;
      td->ddir_nr = td->o.ddir_nr;

      if ((td->o.stonewall || td->o.numjobs > 1 || td->o.new_group)
           && prev_group_jobs) {
            prev_group_jobs = 0;
            groupid++;
      }

      td->groupid = groupid;
      prev_group_jobs++;

      if (init_random_state(td))
            goto err;

      if (setup_rate(td))
            goto err;

      if (td->o.write_lat_log) {
            setup_log(&td->ts.slat_log);
            setup_log(&td->ts.clat_log);
      }
      if (td->o.write_bw_log)
            setup_log(&td->ts.bw_log);

      if (!td->o.name)
            td->o.name = strdup(jobname);

      if (!terse_output) {
            if (!job_add_num) {
                  if (!strcmp(td->io_ops->name, "cpuio")) {
                        log_info("%s: ioengine=cpu, cpuload=%u,"
                               " cpucycle=%u\n", td->o.name,
                                          td->o.cpuload,
                                          td->o.cpucycle);
                  } else {
                        char *c1, *c2, *c3, *c4;

                        c1 = to_kmg(td->o.min_bs[DDIR_READ]);
                        c2 = to_kmg(td->o.max_bs[DDIR_READ]);
                        c3 = to_kmg(td->o.min_bs[DDIR_WRITE]);
                        c4 = to_kmg(td->o.max_bs[DDIR_WRITE]);

                        log_info("%s: (g=%d): rw=%s, bs=%s-%s/%s-%s,"
                               " ioengine=%s, iodepth=%u\n",
                                    td->o.name, td->groupid,
                                    ddir_str[td->o.td_ddir],
                                    c1, c2, c3, c4,
                                    td->io_ops->name,
                                    td->o.iodepth);

                        free(c1);
                        free(c2);
                        free(c3);
                        free(c4);
                  }
            } else if (job_add_num == 1)
                  log_info("...\n");
      }

      /*
       * recurse add identical jobs, clear numjobs and stonewall options
       * as they don't apply to sub-jobs
       */
      numjobs = td->o.numjobs;
      while (--numjobs) {
            struct thread_data *td_new = get_new_job(0, td);

            if (!td_new)
                  goto err;

            td_new->o.numjobs = 1;
            td_new->o.stonewall = 0;
            td_new->o.new_group = 0;

            if (file_alloced) {
                  td_new->o.filename = NULL;
                  td_new->files_index = 0;
                  td_new->files_size = 0;
                  td_new->files = NULL;
            }

            job_add_num = numjobs - 1;

            if (add_job(td_new, jobname, job_add_num))
                  goto err;
      }

      return 0;
err:
      put_job(td);
      return -1;
}

static int skip_this_section(const char *name)
{
      if (!job_section)
            return 0;
      if (!strncmp(name, "global", 6))
            return 0;

      return strcmp(job_section, name);
}

static int is_empty_or_comment(char *line)
{
      unsigned int i;

      for (i = 0; i < strlen(line); i++) {
            if (line[i] == ';')
                  return 1;
            if (line[i] == '#')
                  return 1;
            if (!isspace(line[i]) && !iscntrl(line[i]))
                  return 0;
      }

      return 1;
}

/*
 * This is our [ini] type file parser.
 */
static int parse_jobs_ini(char *file, int stonewall_flag)
{
      unsigned int global;
      struct thread_data *td;
      char *string, *name;
      FILE *f;
      char *p;
      int ret = 0, stonewall;
      int first_sect = 1;
      int skip_fgets = 0;
      int inside_skip = 0;
      char **opts;
      int i, alloc_opts, num_opts;

      if (!strcmp(file, "-"))
            f = stdin;
      else
            f = fopen(file, "r");

      if (!f) {
            perror("fopen job file");
            return 1;
      }

      string = malloc(4096);

      /*
       * it's really 256 + small bit, 280 should suffice
       */
      name = malloc(280);
      memset(name, 0, 280);

      alloc_opts = 8;
      opts = malloc(sizeof(char *) * alloc_opts);
      num_opts = 0;

      stonewall = stonewall_flag;
      do {
            /*
             * if skip_fgets is set, we already have loaded a line we
             * haven't handled.
             */
            if (!skip_fgets) {
                  p = fgets(string, 4095, f);
                  if (!p)
                        break;
            }

            skip_fgets = 0;
            strip_blank_front(&p);
            strip_blank_end(p);

            if (is_empty_or_comment(p))
                  continue;
            if (sscanf(p, "[%255s]", name) != 1) {
                  if (inside_skip)
                        continue;
                  log_err("fio: option <%s> outside of [] job section\n",
                                                      p);
                  break;
            }

            if (skip_this_section(name)) {
                  inside_skip = 1;
                  continue;
            } else
                  inside_skip = 0;

            global = !strncmp(name, "global", 6);

            name[strlen(name) - 1] = '\0';

            if (dump_cmdline) {
                  if (first_sect)
                        log_info("fio ");
                  if (!global)
                        log_info("--name=%s ", name);
                  first_sect = 0;
            }

            td = get_new_job(global, &def_thread);
            if (!td) {
                  ret = 1;
                  break;
            }

            /*
             * Seperate multiple job files by a stonewall
             */
            if (!global && stonewall) {
                  td->o.stonewall = stonewall;
                  stonewall = 0;
            }

            num_opts = 0;
            memset(opts, 0, alloc_opts * sizeof(char *));

            while ((p = fgets(string, 4096, f)) != NULL) {
                  if (is_empty_or_comment(p))
                        continue;

                  strip_blank_front(&p);

                  /*
                   * new section, break out and make sure we don't
                   * fgets() a new line at the top.
                   */
                  if (p[0] == '[') {
                        skip_fgets = 1;
                        break;
                  }

                  strip_blank_end(p);

                  if (num_opts == alloc_opts) {
                        alloc_opts <<= 1;
                        opts = realloc(opts,
                                    alloc_opts * sizeof(char *));
                  }

                  opts[num_opts] = strdup(p);
                  num_opts++;
            }

            ret = fio_options_parse(td, opts, num_opts);
            if (!ret) {
                  if (dump_cmdline)
                        for (i = 0; i < num_opts; i++)
                              log_info("--%s ", opts[i]);

                  ret = add_job(td, name, 0);
            } else {
                  log_err("fio: job %s dropped\n", name);
                  put_job(td);
            }

            for (i = 0; i < num_opts; i++)
                  free(opts[i]);
            num_opts = 0;
      } while (!ret);

      if (dump_cmdline)
            log_info("\n");

      for (i = 0; i < num_opts; i++)
            free(opts[i]);

      free(string);
      free(name);
      free(opts);
      if (f != stdin)
            fclose(f);
      return ret;
}

static int fill_def_thread(void)
{
      memset(&def_thread, 0, sizeof(def_thread));

      fio_getaffinity(getpid(), &def_thread.o.cpumask);

      /*
       * fill default options
       */
      fio_fill_default_options(&def_thread);

      def_thread.o.timeout = def_timeout;
      def_thread.o.write_bw_log = write_bw_log;
      def_thread.o.write_lat_log = write_lat_log;

      return 0;
}

static void free_shm(void)
{
      struct shmid_ds sbuf;

      if (threads) {
            void *tp = threads;

            threads = NULL;
            file_hash_exit();
            fio_debug_jobp = NULL;
            shmdt(tp);
            shmctl(shm_id, IPC_RMID, &sbuf);
      }

      scleanup();
}

/*
 * The thread area is shared between the main process and the job
 * threads/processes. So setup a shared memory segment that will hold
 * all the job info. We use the end of the region for keeping track of
 * open files across jobs, for file sharing.
 */
static int setup_thread_area(void)
{
      void *hash;

      /*
       * 1024 is too much on some machines, scale max_jobs if
       * we get a failure that looks like too large a shm segment
       */
      do {
            size_t size = max_jobs * sizeof(struct thread_data);

            size += file_hash_size;
            size += sizeof(unsigned int);

            shm_id = shmget(0, size, IPC_CREAT | 0600);
            if (shm_id != -1)
                  break;
            if (errno != EINVAL) {
                  perror("shmget");
                  break;
            }

            max_jobs >>= 1;
      } while (max_jobs);

      if (shm_id == -1)
            return 1;

      threads = shmat(shm_id, NULL, 0);
      if (threads == (void *) -1) {
            perror("shmat");
            return 1;
      }

      memset(threads, 0, max_jobs * sizeof(struct thread_data));
      hash = (void *) threads + max_jobs * sizeof(struct thread_data);
      fio_debug_jobp = (void *) hash + file_hash_size;
      *fio_debug_jobp = -1;
      file_hash_init(hash);
      atexit(free_shm);
      return 0;
}

static void usage(const char *name)
{
      printf("%s\n", fio_version_string);
      printf("%s [options] [job options] <job file(s)>\n", name);
      printf("\t--debug=options\tEnable debug logging\n");
      printf("\t--output\tWrite output to file\n");
      printf("\t--timeout\tRuntime in seconds\n");
      printf("\t--latency-log\tGenerate per-job latency logs\n");
      printf("\t--bandwidth-log\tGenerate per-job bandwidth logs\n");
      printf("\t--minimal\tMinimal (terse) output\n");
      printf("\t--version\tPrint version info and exit\n");
      printf("\t--help\t\tPrint this page\n");
      printf("\t--cmdhelp=cmd\tPrint command help, \"all\" for all of"
            " them\n");
      printf("\t--showcmd\tTurn a job file into command line options\n");
      printf("\t--eta=when\tWhen ETA estimate should be printed\n");
      printf("\t          \tMay be \"always\", \"never\" or \"auto\"\n");
      printf("\t--readonly\tTurn on safety read-only checks, preventing"
            " writes\n");
      printf("\t--section=name\tOnly run specified section in job file\n");
      printf("\t--alloc-size=kb\tSet smalloc pool to this size in kb"
            " (def 1024)\n");
      printf("\nFio was written by Jens Axboe <jens.axboe@oracle.com>\n");
}

#ifdef FIO_INC_DEBUG
struct debug_level debug_levels[] = {
      { .name = "process",    .shift = FD_PROCESS, },
      { .name = "file", .shift = FD_FILE, },
      { .name = "io",         .shift = FD_IO, },
      { .name = "mem",  .shift = FD_MEM, },
      { .name = "blktrace",   .shift = FD_BLKTRACE },
      { .name = "verify",     .shift = FD_VERIFY },
      { .name = "random",     .shift = FD_RANDOM },
      { .name = "parse",      .shift = FD_PARSE },
      { .name = "diskutil",   .shift = FD_DISKUTIL },
      { .name = "job",  .shift = FD_JOB },
      { .name = "mutex",      .shift = FD_MUTEX },
      { .name = NULL, },
};

static int set_debug(const char *string)
{
      struct debug_level *dl;
      char *p = (char *) string;
      char *opt;
      int i;

      if (!strcmp(string, "?") || !strcmp(string, "help")) {
            int i;

            log_info("fio: dumping debug options:");
            for (i = 0; debug_levels[i].name; i++) {
                  dl = &debug_levels[i];
                  log_info("%s,", dl->name);
            }
            log_info("all\n");
            return 1;
      }

      while ((opt = strsep(&p, ",")) != NULL) {
            int found = 0;

            if (!strncmp(opt, "all", 3)) {
                  log_info("fio: set all debug options\n");
                  fio_debug = ~0UL;
                  continue;
            }

            for (i = 0; debug_levels[i].name; i++) {
                  dl = &debug_levels[i];
                  found = !strncmp(opt, dl->name, strlen(dl->name));
                  if (!found)
                        continue;

                  if (dl->shift == FD_JOB) {
                        opt = strchr(opt, ':');
                        if (!opt) {
                              log_err("fio: missing job number\n");
                              break;
                        }
                        opt++;
                        fio_debug_jobno = atoi(opt);
                        log_info("fio: set debug jobno %d\n",
                                          fio_debug_jobno);
                  } else {
                        log_info("fio: set debug option %s\n", opt);
                        fio_debug |= (1UL << dl->shift);
                  }
                  break;
            }

            if (!found)
                  log_err("fio: debug mask %s not found\n", opt);
      }
      return 0;
}
#else
static int set_debug(const char *string)
{
      log_err("fio: debug tracing not included in build\n");
      return 1;
}
#endif

static int parse_cmd_line(int argc, char *argv[])
{
      struct thread_data *td = NULL;
      int c, ini_idx = 0, lidx, ret = 0, do_exit = 0, exit_val = 0;

      while ((c = getopt_long_only(argc, argv, "", l_opts, &lidx)) != -1) {
            switch (c) {
            case 'a':
                  smalloc_pool_size = atoi(optarg);
                  break;
            case 't':
                  def_timeout = atoi(optarg);
                  break;
            case 'l':
                  write_lat_log = 1;
                  break;
            case 'w':
                  write_bw_log = 1;
                  break;
            case 'o':
                  f_out = fopen(optarg, "w+");
                  if (!f_out) {
                        perror("fopen output");
                        exit(1);
                  }
                  f_err = f_out;
                  break;
            case 'm':
                  terse_output = 1;
                  break;
            case 'h':
                  usage(argv[0]);
                  exit(0);
            case 'c':
                  exit(fio_show_option_help(optarg));
            case 's':
                  dump_cmdline = 1;
                  break;
            case 'r':
                  read_only = 1;
                  break;
            case 'v':
                  printf("%s\n", fio_version_string);
                  exit(0);
            case 'e':
                  if (!strcmp("always", optarg))
                        eta_print = FIO_ETA_ALWAYS;
                  else if (!strcmp("never", optarg))
                        eta_print = FIO_ETA_NEVER;
                  break;
            case 'd':
                  if (set_debug(optarg))
                        do_exit++;
                  break;
            case 'x':
                  if (!strcmp(optarg, "global")) {
                        log_err("fio: can't use global as only "
                              "section\n");
                        do_exit++;
                        exit_val = 1;
                        break;
                  }
                  if (job_section)
                        free(job_section);
                  job_section = strdup(optarg);
                  break;
            case FIO_GETOPT_JOB: {
                  const char *opt = l_opts[lidx].name;
                  char *val = optarg;

                  if (!strncmp(opt, "name", 4) && td) {
                        ret = add_job(td, td->o.name ?: "fio", 0);
                        if (ret) {
                              put_job(td);
                              return 0;
                        }
                        td = NULL;
                  }
                  if (!td) {
                        int is_section = !strncmp(opt, "name", 4);
                        int global = 0;

                        if (!is_section || !strncmp(val, "global", 6))
                              global = 1;

                        if (is_section && skip_this_section(val))
                              continue;

                        td = get_new_job(global, &def_thread);
                        if (!td)
                              return 0;
                  }

                  ret = fio_cmd_option_parse(td, opt, val);
                  break;
            }
            default:
                  do_exit++;
                  exit_val = 1;
                  break;
            }
      }

      if (do_exit)
            exit(exit_val);

      if (td) {
            if (!ret)
                  ret = add_job(td, td->o.name ?: "fio", 0);
            if (ret)
                  put_job(td);
      }

      while (optind < argc) {
            ini_idx++;
            ini_file = realloc(ini_file, ini_idx * sizeof(char *));
            ini_file[ini_idx - 1] = strdup(argv[optind]);
            optind++;
      }

      return ini_idx;
}

int parse_options(int argc, char *argv[])
{
      int job_files, i;

      f_out = stdout;
      f_err = stderr;

      fio_options_dup_and_init(l_opts);

      if (setup_thread_area())
            return 1;
      if (fill_def_thread())
            return 1;

      job_files = parse_cmd_line(argc, argv);

      for (i = 0; i < job_files; i++) {
            if (fill_def_thread())
                  return 1;
            if (parse_jobs_ini(ini_file[i], i))
                  return 1;
            free(ini_file[i]);
      }

      free(ini_file);
      options_mem_free(&def_thread);

      if (!thread_number) {
            if (dump_cmdline)
                  return 0;

            log_err("No jobs defined(s)\n\n");
            usage(argv[0]);
            return 1;
      }

      if (def_thread.o.gtod_offload) {
            fio_gtod_init();
            fio_gtod_offload = 1;
            fio_gtod_cpu = def_thread.o.gtod_cpu;
      }

      return 0;
}

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