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Sourcecode: fio version File versions

filesetup.c

#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <assert.h>
#include <dirent.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <sys/types.h>

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

static int root_warn;

static inline void clear_error(struct thread_data *td)
{
      td->error = 0;
      td->verror[0] = '\0';
}

/*
 * Leaves f->fd open on success, caller must close
 */
static int extend_file(struct thread_data *td, struct fio_file *f)
{
      int r, new_layout = 0, unlink_file = 0, flags;
      unsigned long long left;
      unsigned int bs;
      char *b;

      if (read_only) {
            log_err("fio: refusing extend of file due to read-only\n");
            return 0;
      }

      /*
       * check if we need to lay the file out complete again. fio
       * does that for operations involving reads, or for writes
       * where overwrite is set
       */
      if (td_read(td) || (td_write(td) && td->o.overwrite) ||
          (td_write(td) && td->io_ops->flags & FIO_NOEXTEND))
            new_layout = 1;
      if (td_write(td) && !td->o.overwrite)
            unlink_file = 1;

      if (unlink_file || new_layout) {
            dprint(FD_FILE, "layout unlink %s\n", f->file_name);
            if ((unlink(f->file_name) < 0) && (errno != ENOENT)) {
                  td_verror(td, errno, "unlink");
                  return 1;
            }
      }

      flags = O_WRONLY | O_CREAT;
      if (new_layout)
            flags |= O_TRUNC;

      dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
      f->fd = open(f->file_name, flags, 0644);
      if (f->fd < 0) {
            td_verror(td, errno, "open");
            return 1;
      }

      if (!new_layout)
            goto done;

      /*
       * The size will be -1ULL when fill_device is used, so don't truncate
       * or fallocate this file, just write it
       */
      if (!td->o.fill_device) {
            dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
                                          f->real_file_size);
            if (ftruncate(f->fd, f->real_file_size) == -1) {
                  td_verror(td, errno, "ftruncate");
                  goto err;
            }

#ifdef FIO_HAVE_FALLOCATE
            dprint(FD_FILE, "fallocate file %s, size %llu\n", f->file_name,
                                          f->real_file_size);
            r = posix_fallocate(f->fd, 0, f->real_file_size);
            if (r < 0) {
                  log_err("fio: posix_fallocate fails: %s\n",
                              strerror(-r));
            }
#endif
      }

      b = malloc(td->o.max_bs[DDIR_WRITE]);
      memset(b, 0, td->o.max_bs[DDIR_WRITE]);

      left = f->real_file_size;
      while (left && !td->terminate) {
            bs = td->o.max_bs[DDIR_WRITE];
            if (bs > left)
                  bs = left;

            r = write(f->fd, b, bs);

            if (r > 0) {
                  left -= r;
                  continue;
            } else {
                  if (r < 0) {
                        int __e = errno;

                        if (__e == ENOSPC) {
                              if (td->o.fill_device)
                                    break;
                              log_info("fio: ENOSPC on laying out "
                                     "file, stopping\n");
                              break;
                        }
                        td_verror(td, errno, "write");
                  } else
                        td_verror(td, EIO, "write");

                  break;
            }
      }

      if (td->terminate) {
            dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
            unlink(f->file_name);
      } else if (td->o.create_fsync) {
            if (fsync(f->fd) < 0) {
                  td_verror(td, errno, "fsync");
                  goto err;
            }
      }
      if (td->o.fill_device && !td_write(td)) {
            fio_file_clear_size_known(f);
            if (td_io_get_file_size(td, f))
                  goto err;
            if (f->io_size > f->real_file_size)
                  f->io_size = f->real_file_size;
      }

      free(b);
done:
      return 0;
err:
      close(f->fd);
      f->fd = -1;
      return 1;
}

static int pre_read_file(struct thread_data *td, struct fio_file *f)
{
      int r, did_open = 0, old_runstate;
      unsigned long long left;
      unsigned int bs;
      char *b;

      if (td->io_ops->flags & FIO_PIPEIO)
            return 0;

      if (!fio_file_open(f)) {
            if (td->io_ops->open_file(td, f)) {
                  log_err("fio: cannot pre-read, failed to open file\n");
                  return 1;
            }
            did_open = 1;
      }

      old_runstate = td->runstate;
      td_set_runstate(td, TD_PRE_READING);

      bs = td->o.max_bs[DDIR_READ];
      b = malloc(bs);
      memset(b, 0, bs);

      lseek(f->fd, f->file_offset, SEEK_SET);
      left = f->io_size;

      while (left && !td->terminate) {
            if (bs > left)
                  bs = left;

            r = read(f->fd, b, bs);

            if (r == (int) bs) {
                  left -= bs;
                  continue;
            } else {
                  td_verror(td, EIO, "pre_read");
                  break;
            }
      }

      td_set_runstate(td, old_runstate);

      if (did_open)
            td->io_ops->close_file(td, f);
      free(b);
      return 0;
}

static unsigned long long get_rand_file_size(struct thread_data *td)
{
      unsigned long long ret, sized;
      long r;

      r = os_random_long(&td->file_size_state);
      sized = td->o.file_size_high - td->o.file_size_low;
      ret = (unsigned long long) ((double) sized * (r / (OS_RAND_MAX + 1.0)));
      ret += td->o.file_size_low;
      ret -= (ret % td->o.rw_min_bs);
      return ret;
}

static int file_size(struct thread_data *td, struct fio_file *f)
{
      struct stat st;

      if (stat(f->file_name, &st) == -1) {
            td_verror(td, errno, "fstat");
            return 1;
      }

      f->real_file_size = st.st_size;
      return 0;
}

static int bdev_size(struct thread_data *td, struct fio_file *f)
{
      unsigned long long bytes;
      int r;

      if (td->io_ops->open_file(td, f)) {
            log_err("fio: failed opening blockdev %s for size check\n",
                  f->file_name);
            return 1;
      }

      r = blockdev_size(f->fd, &bytes);
      if (r) {
            td_verror(td, r, "blockdev_size");
            goto err;
      }

      if (!bytes) {
            log_err("%s: zero sized block device?\n", f->file_name);
            goto err;
      }

      f->real_file_size = bytes;
      td->io_ops->close_file(td, f);
      return 0;
err:
      td->io_ops->close_file(td, f);
      return 1;
}

static int get_file_size(struct thread_data *td, struct fio_file *f)
{
      int ret = 0;

      if (fio_file_size_known(f))
            return 0;

      if (f->filetype == FIO_TYPE_FILE)
            ret = file_size(td, f);
      else if (f->filetype == FIO_TYPE_BD)
            ret = bdev_size(td, f);
      else
            f->real_file_size = -1;

      if (ret)
            return ret;

      if (f->file_offset > f->real_file_size) {
            log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name,
                              f->file_offset, f->real_file_size);
            return 1;
      }

      fio_file_set_size_known(f);
      return 0;
}

static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
                           unsigned long long off,
                           unsigned long long len)
{
      int ret = 0;

      if (len == -1ULL)
            len = f->io_size;
      if (off == -1ULL)
            off = f->file_offset;

      if (len == -1ULL || off == -1ULL)
            return 0;

      dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
                                                len);

      /*
       * FIXME: add blockdev flushing too
       */
      if (f->mmap_ptr)
            ret = madvise(f->mmap_ptr, f->mmap_sz, MADV_DONTNEED);
      else if (f->filetype == FIO_TYPE_FILE) {
            ret = fadvise(f->fd, off, len, POSIX_FADV_DONTNEED);
      } else if (f->filetype == FIO_TYPE_BD) {
            ret = blockdev_invalidate_cache(f->fd);
            if (ret < 0 && errno == EACCES && geteuid()) {
                  if (!root_warn) {
                        log_err("fio: only root may flush block "
                              "devices. Cache flush bypassed!\n");
                        root_warn = 1;
                  }
                  ret = 0;
            }
      } else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
            ret = 0;

      if (ret < 0) {
            td_verror(td, errno, "invalidate_cache");
            return 1;
      } else if (ret > 0) {
            td_verror(td, ret, "invalidate_cache");
            return 1;
      }

      return ret;

}

int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
{
      if (!fio_file_open(f))
            return 0;

      return __file_invalidate_cache(td, f, -1ULL, -1ULL);
}

int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
{
      int ret = 0;

      dprint(FD_FILE, "fd close %s\n", f->file_name);

      remove_file_hash(f);

      if (close(f->fd) < 0)
            ret = errno;

      f->fd = -1;
      return ret;
}

static int file_lookup_open(struct fio_file *f, int flags)
{
      struct fio_file *__f;
      int from_hash;

      __f = lookup_file_hash(f->file_name);
      if (__f) {
            dprint(FD_FILE, "found file in hash %s\n", f->file_name);
            /*
             * racy, need the __f->lock locked
             */
            f->lock = __f->lock;
            f->lock_owner = __f->lock_owner;
            f->lock_batch = __f->lock_batch;
            f->lock_ddir = __f->lock_ddir;
            from_hash = 1;
      } else {
            dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
            from_hash = 0;
      }

      f->fd = open(f->file_name, flags, 0600);
      return from_hash;
}

int generic_open_file(struct thread_data *td, struct fio_file *f)
{
      int is_std = 0;
      int flags = 0;
      int from_hash = 0;

      dprint(FD_FILE, "fd open %s\n", f->file_name);

      if (!strcmp(f->file_name, "-")) {
            if (td_rw(td)) {
                  log_err("fio: can't read/write to stdin/out\n");
                  return 1;
            }
            is_std = 1;

            /*
             * move output logging to stderr, if we are writing to stdout
             */
            if (td_write(td))
                  f_out = stderr;
      }

      if (td->o.odirect)
            flags |= OS_O_DIRECT;
      if (td->o.sync_io)
            flags |= O_SYNC;
      if (f->filetype != FIO_TYPE_FILE)
            flags |= FIO_O_NOATIME;
      if (td->o.create_on_open)
            flags |= O_CREAT;

open_again:
      if (td_write(td)) {
            if (!read_only)
                  flags |= O_RDWR;

            if (f->filetype == FIO_TYPE_FILE)
                  flags |= O_CREAT;

            if (is_std)
                  f->fd = dup(STDOUT_FILENO);
            else
                  from_hash = file_lookup_open(f, flags);
      } else {
            if (f->filetype == FIO_TYPE_CHAR && !read_only)
                  flags |= O_RDWR;
            else
                  flags |= O_RDONLY;

            if (is_std)
                  f->fd = dup(STDIN_FILENO);
            else
                  from_hash = file_lookup_open(f, flags);
      }

      if (f->fd == -1) {
            char buf[FIO_VERROR_SIZE];
            int __e = errno;

            if (__e == EPERM && (flags & FIO_O_NOATIME)) {
                  flags &= ~FIO_O_NOATIME;
                  goto open_again;
            }

            snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);

            td_verror(td, __e, buf);
      }

      if (!from_hash && f->fd != -1) {
            if (add_file_hash(f)) {
                  int ret;

                  /*
                   * OK to ignore, we haven't done anything with it
                   */
                  ret = generic_close_file(td, f);
                  goto open_again;
            }
      }

      return 0;
}

int generic_get_file_size(struct thread_data *td, struct fio_file *f)
{
      return get_file_size(td, f);
}

/*
 * open/close all files, so that ->real_file_size gets set
 */
static int get_file_sizes(struct thread_data *td)
{
      struct fio_file *f;
      unsigned int i;
      int err = 0;

      for_each_file(td, f, i) {
            dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
                                                f->file_name);

            if (td_io_get_file_size(td, f)) {
                  if (td->error != ENOENT) {
                        log_err("%s\n", td->verror);
                        err = 1;
                  }
                  clear_error(td);
            }

            if (f->real_file_size == -1ULL && td->o.size)
                  f->real_file_size = td->o.size / td->o.nr_files;
      }

      return err;
}

/*
 * Open the files and setup files sizes, creating files if necessary.
 */
int setup_files(struct thread_data *td)
{
      unsigned long long total_size, extend_size;
      struct fio_file *f;
      unsigned int i;
      int err = 0, need_extend;

      dprint(FD_FILE, "setup files\n");

      if (td->o.read_iolog_file)
            return 0;

      /*
       * if ioengine defines a setup() method, it's responsible for
       * opening the files and setting f->real_file_size to indicate
       * the valid range for that file.
       */
      if (td->io_ops->setup)
            err = td->io_ops->setup(td);
      else
            err = get_file_sizes(td);

      if (err)
            return err;

      /*
       * check sizes. if the files/devices do not exist and the size
       * isn't passed to fio, abort.
       */
      total_size = 0;
      for_each_file(td, f, i) {
            if (f->real_file_size == -1ULL)
                  total_size = -1ULL;
            else
                  total_size += f->real_file_size;
      }

      /*
       * device/file sizes are zero and no size given, punt
       */
      if ((!total_size || total_size == -1ULL) && !td->o.size &&
          !(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
            log_err("%s: you need to specify size=\n", td->o.name);
            td_verror(td, EINVAL, "total_file_size");
            return 1;
      }

      /*
       * now file sizes are known, so we can set ->io_size. if size= is
       * not given, ->io_size is just equal to ->real_file_size. if size
       * is given, ->io_size is size / nr_files.
       */
      extend_size = total_size = 0;
      need_extend = 0;
      for_each_file(td, f, i) {
            f->file_offset = td->o.start_offset;

            if (!td->o.file_size_low) {
                  /*
                   * no file size range given, file size is equal to
                   * total size divided by number of files. if that is
                   * zero, set it to the real file size.
                   */
                  f->io_size = td->o.size / td->o.nr_files;
                  if (!f->io_size)
                        f->io_size = f->real_file_size - f->file_offset;
            } else if (f->real_file_size < td->o.file_size_low ||
                     f->real_file_size > td->o.file_size_high) {
                  if (f->file_offset > td->o.file_size_low)
                        goto err_offset;
                  /*
                   * file size given. if it's fixed, use that. if it's a
                   * range, generate a random size in-between.
                   */
                  if (td->o.file_size_low == td->o.file_size_high) {
                        f->io_size = td->o.file_size_low
                                    - f->file_offset;
                  } else {
                        f->io_size = get_rand_file_size(td)
                                    - f->file_offset;
                  }
            } else
                  f->io_size = f->real_file_size - f->file_offset;

            if (f->io_size == -1ULL)
                  total_size = -1ULL;
            else
                  total_size += f->io_size;

            if (f->filetype == FIO_TYPE_FILE &&
                (f->io_size + f->file_offset) > f->real_file_size &&
                !(td->io_ops->flags & FIO_DISKLESSIO)) {
                  if (!td->o.create_on_open) {
                        need_extend++;
                        extend_size += (f->io_size + f->file_offset);
                  } else
                        f->real_file_size = f->io_size + f->file_offset;
                  fio_file_set_extend(f);
            }
      }

      if (!td->o.size || td->o.size > total_size)
            td->o.size = total_size;

      /*
       * See if we need to extend some files
       */
      if (need_extend) {
            temp_stall_ts = 1;
            if (!terse_output)
                  log_info("%s: Laying out IO file(s) (%u file(s) /"
                         " %LuMB)\n", td->o.name, need_extend,
                              extend_size >> 20);

            for_each_file(td, f, i) {
                  unsigned long long old_len = -1ULL, extend_len = -1ULL;

                  if (!fio_file_extend(f))
                        continue;

                  assert(f->filetype == FIO_TYPE_FILE);
                  fio_file_clear_extend(f);
                  if (!td->o.fill_device) {
                        old_len = f->real_file_size;
                        extend_len = f->io_size + f->file_offset - old_len;
                  }
                  f->real_file_size = (f->io_size + f->file_offset);
                  err = extend_file(td, f);
                  if (err)
                        break;

                  err = __file_invalidate_cache(td, f, old_len,
                                                extend_len);
                  close(f->fd);
                  f->fd = -1;
                  if (err)
                        break;
            }
            temp_stall_ts = 0;
      }

      if (err)
            return err;

      if (!td->o.zone_size)
            td->o.zone_size = td->o.size;

      /*
       * iolog already set the total io size, if we read back
       * stored entries.
       */
      if (!td->o.read_iolog_file)
            td->total_io_size = td->o.size * td->o.loops;
      return 0;
err_offset:
      log_err("%s: you need to specify valid offset=\n", td->o.name);
      return 1;
}

int pre_read_files(struct thread_data *td)
{
      struct fio_file *f;
      unsigned int i;

      dprint(FD_FILE, "pre_read files\n");

      for_each_file(td, f, i) {
            pre_read_file(td, f);
      }

      return 1;
}

int init_random_map(struct thread_data *td)
{
      unsigned long long blocks, num_maps;
      struct fio_file *f;
      unsigned int i;

      if (td->o.norandommap || !td_random(td))
            return 0;

      for_each_file(td, f, i) {
            blocks = (f->real_file_size + td->o.rw_min_bs - 1) /
                        (unsigned long long) td->o.rw_min_bs;
            num_maps = (blocks + BLOCKS_PER_MAP - 1) /
                        (unsigned long long) BLOCKS_PER_MAP;
            f->file_map = smalloc(num_maps * sizeof(int));
            if (f->file_map) {
                  f->num_maps = num_maps;
                  continue;
            }
            if (!td->o.softrandommap) {
                  log_err("fio: failed allocating random map. If running"
                        " a large number of jobs, try the 'norandommap'"
                        " option or set 'softrandommap'. Or give"
                        " a larger --alloc-size to fio.\n");
                  return 1;
            }

            log_info("fio: file %s failed allocating random map. Running "
                   "job without.\n", f->file_name);
            f->num_maps = 0;
      }

      return 0;
}

void close_files(struct thread_data *td)
{
      struct fio_file *f;
      unsigned int i;

      for_each_file(td, f, i) {
            if (fio_file_open(f))
                  td_io_close_file(td, f);
      }
}

void close_and_free_files(struct thread_data *td)
{
      struct fio_file *f;
      unsigned int i;

      dprint(FD_FILE, "close files\n");

      for_each_file(td, f, i) {
            if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
                  dprint(FD_FILE, "free unlink %s\n", f->file_name);
                  unlink(f->file_name);
            }

            if (fio_file_open(f))
                  td_io_close_file(td, f);

            remove_file_hash(f);

            sfree(f->file_name);
            f->file_name = NULL;

            if (f->file_map) {
                  sfree(f->file_map);
                  f->file_map = NULL;
            }
            sfree(f);
      }

      td->o.filename = NULL;
      free(td->files);
      td->files_index = 0;
      td->files = NULL;
      td->o.nr_files = 0;
}

static void get_file_type(struct fio_file *f)
{
      struct stat sb;

      if (!strcmp(f->file_name, "-"))
            f->filetype = FIO_TYPE_PIPE;
      else
            f->filetype = FIO_TYPE_FILE;

      if (!lstat(f->file_name, &sb)) {
            if (S_ISBLK(sb.st_mode))
                  f->filetype = FIO_TYPE_BD;
            else if (S_ISCHR(sb.st_mode))
                  f->filetype = FIO_TYPE_CHAR;
            else if (S_ISFIFO(sb.st_mode))
                  f->filetype = FIO_TYPE_PIPE;
      }
}

int add_file(struct thread_data *td, const char *fname)
{
      int cur_files = td->files_index;
      char file_name[PATH_MAX];
      struct fio_file *f;
      int len = 0;

      dprint(FD_FILE, "add file %s\n", fname);

      f = smalloc(sizeof(*f));
      if (!f) {
            log_err("fio: smalloc OOM\n");
            assert(0);
      }
            
      f->fd = -1;

      if (td->files_size <= td->files_index) {
            int new_size = td->o.nr_files + 1;

            dprint(FD_FILE, "resize file array to %d files\n", new_size);

            td->files = realloc(td->files, new_size * sizeof(f));
            td->files_size = new_size;
      }
      td->files[cur_files] = f;

      /*
       * init function, io engine may not be loaded yet
       */
      if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
            f->real_file_size = -1ULL;

      if (td->o.directory)
            len = sprintf(file_name, "%s/", td->o.directory);

      sprintf(file_name + len, "%s", fname);
      f->file_name = smalloc_strdup(file_name);
      if (!f->file_name) {
            log_err("fio: smalloc OOM\n");
            assert(0);
      }
      
      get_file_type(f);

      switch (td->o.file_lock_mode) {
      case FILE_LOCK_NONE:
            break;
      case FILE_LOCK_READWRITE:
            f->lock = fio_mutex_rw_init();
            break;
      case FILE_LOCK_EXCLUSIVE:
            f->lock = fio_mutex_init(1);
            break;
      default:
            log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
            assert(0);
      }

      td->files_index++;
      if (f->filetype == FIO_TYPE_FILE)
            td->nr_normal_files++;

      dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
                                          cur_files);

      return cur_files;
}

void get_file(struct fio_file *f)
{
      dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
      assert(fio_file_open(f));
      f->references++;
}

int put_file(struct thread_data *td, struct fio_file *f)
{
      int f_ret = 0, ret = 0;

      dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);

      if (!fio_file_open(f)) {
            assert(f->fd == -1);
            return 0;
      }

      assert(f->references);
      if (--f->references)
            return 0;

      if (should_fsync(td) && td->o.fsync_on_close)
            f_ret = fsync(f->fd);

      if (td->io_ops->close_file)
            ret = td->io_ops->close_file(td, f);

      if (!ret)
            ret = f_ret;

      td->nr_open_files--;
      fio_file_clear_open(f);
      assert(f->fd == -1);
      return ret;
}

void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
{
      if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
            return;

      if (f->lock_owner == td && f->lock_batch--)
            return;

      if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
            if (ddir == DDIR_READ)
                  fio_mutex_down_read(f->lock);
            else
                  fio_mutex_down_write(f->lock);
      } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
            fio_mutex_down(f->lock);

      f->lock_owner = td;
      f->lock_batch = td->o.lockfile_batch;
      f->lock_ddir = ddir;
}

void unlock_file(struct thread_data *td, struct fio_file *f)
{
      if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
            return;
      if (f->lock_batch)
            return;

      if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
            const int is_read = f->lock_ddir == DDIR_READ;
            int val = fio_mutex_getval(f->lock);

            if ((is_read && val == 1) || (!is_read && val == -1))
                  f->lock_owner = NULL;

            if (is_read)
                  fio_mutex_up_read(f->lock);
            else
                  fio_mutex_up_write(f->lock);
      } else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
            int val = fio_mutex_getval(f->lock);

            if (val == 0)
                  f->lock_owner = NULL;

            fio_mutex_up(f->lock);
      }
}

void unlock_file_all(struct thread_data *td, struct fio_file *f)
{
      if (f->lock_owner != td)
            return;

      f->lock_batch = 0;
      unlock_file(td, f);
}

static int recurse_dir(struct thread_data *td, const char *dirname)
{
      struct dirent *dir;
      int ret = 0;
      DIR *D;

      D = opendir(dirname);
      if (!D) {
            char buf[FIO_VERROR_SIZE];

            snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
            td_verror(td, errno, buf);
            return 1;
      }

      while ((dir = readdir(D)) != NULL) {
            char full_path[PATH_MAX];
            struct stat sb;

            if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
                  continue;

            sprintf(full_path, "%s/%s", dirname, dir->d_name);

            if (lstat(full_path, &sb) == -1) {
                  if (errno != ENOENT) {
                        td_verror(td, errno, "stat");
                        return 1;
                  }
            }

            if (S_ISREG(sb.st_mode)) {
                  add_file(td, full_path);
                  td->o.nr_files++;
                  continue;
            }
            if (!S_ISDIR(sb.st_mode))
                  continue;

            ret = recurse_dir(td, full_path);
            if (ret)
                  break;
      }

      closedir(D);
      return ret;
}

int add_dir_files(struct thread_data *td, const char *path)
{
      int ret = recurse_dir(td, path);

      if (!ret)
            log_info("fio: opendir added %d files\n", td->o.nr_files);

      return ret;
}

void dup_files(struct thread_data *td, struct thread_data *org)
{
      struct fio_file *f;
      unsigned int i;

      dprint(FD_FILE, "dup files: %d\n", org->files_index);

      if (!org->files)
            return;

      td->files = malloc(org->files_index * sizeof(f));

      for_each_file(org, f, i) {
            struct fio_file *__f;

            __f = smalloc(sizeof(*__f));
            if (!__f) {
                  log_err("fio: smalloc OOM\n");
                  assert(0);
            }
            __f->fd = -1;
      
            if (f->file_name) {
                  __f->file_name = smalloc_strdup(f->file_name);
                  if (!__f->file_name) {
                        log_err("fio: smalloc OOM\n");
                        assert(0);
                  }
      
                  __f->filetype = f->filetype;
            }

            td->files[i] = __f;
      }
}

/*
 * Returns the index that matches the filename, or -1 if not there
 */
int get_fileno(struct thread_data *td, const char *fname)
{
      struct fio_file *f;
      unsigned int i;

      for_each_file(td, f, i)
            if (!strcmp(f->file_name, fname))
                  return i;

      return -1;
}

/*
 * For log usage, where we add/open/close files automatically
 */
void free_release_files(struct thread_data *td)
{
      close_files(td);
      td->files_index = 0;
      td->nr_normal_files = 0;
}

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