filesetup.c - fp2-dev/platform/external/fio - Gitiles

 #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"

 static int root_warn;

 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;

 	/*
 	 * 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))
 		new_layout = 1;
 	if (td_write(td) && !td->o.overwrite)
 		unlink_file = 1;

 	if ((unlink_file || new_layout) && (f->flags & FIO_FILE_EXISTS)) {
 		if (unlink(f->file_name) < 0) {
 			td_verror(td, errno, "unlink");
 			return 1;
 		}
 	}

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

 	f->fd = open(f->file_name, flags, 0644);
 	if (f->fd < 0) {
 		td_verror(td, errno, "open");
 		return 1;
 	}

 	if (ftruncate(f->fd, f->real_file_size) == -1) {
 		td_verror(td, errno, "ftruncate");
 		goto err;
 	}

 	if (!new_layout)
 		goto done;

 	if (posix_fallocate(f->fd, 0, f->real_file_size) < 0) {
 		td_verror(td, errno, "posix_fallocate");
 		goto err;
 	}

 	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 == (int) bs) {
 			left -= bs;
 			continue;
 		} else {
 			if (r < 0)
 				td_verror(td, errno, "write");
 			else
 				td_verror(td, EIO, "write");

 			break;
 		}
 	}

 	if (td->terminate)
 		unlink(f->file_name);
 	else if (td->o.create_fsync)
 		fsync(f->fd);

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

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

 	r = os_random_long(&td->file_size_state);
 	ret = td->o.file_size_low + (unsigned long long) ((double) (td->o.file_size_high - td->o.file_size_low) * (r / (RAND_MAX + 1.0)));
 	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 (fstat(f->fd, &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;

 	r = blockdev_size(f->fd, &bytes);
 	if (r) {
 		td_verror(td, r, "blockdev_size");
 		return 1;
 	}

 	f->real_file_size = bytes;
 	return 0;
 }

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

 	if (f->flags & FIO_SIZE_KNOWN)
 		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;
 	}

 	f->flags |= FIO_SIZE_KNOWN;
 	return 0;
 }

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

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

 	/*
 	 * FIXME: add blockdev flushing too
 	 */
 	if (f->mmap)
 		ret = madvise(f->mmap, f->io_size, MADV_DONTNEED);
 	else if (f->filetype == FIO_TYPE_FILE)
 		ret = fadvise(f->fd, f->file_offset, f->io_size, 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;
 	}

 	return ret;
 }

 void generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
 {
 	close(f->fd);
 	f->fd = -1;
 }

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

 	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 (td_write(td)) {
 		flags |= O_RDWR;

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

 		if (is_std)
 			f->fd = dup(STDOUT_FILENO);
 		else
 			f->fd = open(f->file_name, flags, 0600);
 	} else {
 		if (f->filetype == FIO_TYPE_CHAR)
 			flags |= O_RDWR;
 		else
 			flags |= O_RDONLY;

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

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

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

 		td_verror(td, __e, buf);
 	}

 	if (get_file_size(td, f))
 		goto err;

 	return 0;
 err:
 	close(f->fd);
 	return 1;
 }

 int open_files(struct thread_data *td)
 {
 	struct fio_file *f;
 	unsigned int i;
 	int err = 0;

 	for_each_file(td, f, i) {
 		err = td_io_open_file(td, f);
 		if (err) {
 			if (td->error == EMFILE) {
 				log_err("fio: limited open files to: %d\n", td->nr_open_files);
 				td->o.open_files = td->nr_open_files;
 				err = 0;
 				clear_error(td);
 			}
 			break;
 		}

 		if (td->o.open_files == td->nr_open_files)
 			break;
 	}

 	if (!err)
 		return 0;

 	for_each_file(td, f, i)
 		td_io_close_file(td, f);

 	return err;
 }

 /*
  * 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) {
 		if (td->io_ops->open_file(td, f)) {
 			if (td->error != ENOENT) {
 				log_err("%s\n", td->verror);
 				err = 1;
 			}
 			clear_error(td);
 		} else {
 			if (td->io_ops->close_file)
 				td->io_ops->close_file(td, f);
 		}

 		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;

 	/*
 	 * 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) {
 		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) {
 				if (f->file_offset > f->real_file_size)
 					goto err_offset;
 				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 if (f->file_offset > f->real_file_size)
 			goto err_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)) {
 			need_extend++;
 			extend_size += (f->io_size + f->file_offset);
 			f->flags |= FIO_FILE_EXTEND;
 		}
 	}

 	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;
 		log_info("%s: Laying out IO file(s) (%u files / %LuMiB)\n",
 			td->o.name, need_extend, extend_size >> 20);

 		for_each_file(td, f, i) {
 			if (!(f->flags & FIO_FILE_EXTEND))
 				continue;

 			assert(f->filetype == FIO_TYPE_FILE);
 			f->flags &= ~FIO_FILE_EXTEND;
 			f->real_file_size = (f->io_size + f->file_offset);
 			err = extend_file(td, f);
 			if (err)
 				break;
 		}
 		temp_stall_ts = 0;
 	}

 	if (err)
 		return err;

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

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

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

 	for_each_file(td, f, i) {
 		blocks = (f->real_file_size + td->o.rw_min_bs - 1) / td->o.rw_min_bs;
 		num_maps = (blocks + BLOCKS_PER_MAP-1)/ BLOCKS_PER_MAP;
 		f->file_map = malloc(num_maps * sizeof(long));
 		if (!f->file_map) {
 			log_err("fio: failed allocating random map. If running a large number of jobs, try the 'norandommap' option\n");
 			return 1;
 		}
 		f->num_maps = num_maps;
 		memset(f->file_map, 0, num_maps * sizeof(long));
 	}

 	return 0;
 }

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

 	for_each_file(td, f, i) {
 		if (td->o.unlink && f->filetype == FIO_TYPE_FILE)
 			unlink(f->file_name);

 		td_io_close_file(td, f);

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

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

 	td->o.filename = NULL;
 	free(td->files);
 	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;

 	td->files = realloc(td->files, (cur_files + 1) * sizeof(*f));

 	f = &td->files[cur_files];
 	memset(f, 0, sizeof(*f));
 	f->fd = -1;

 	/*
 	 * 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 = strdup(file_name);

 	get_file_type(f);

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

 	return cur_files;
 }

 void get_file(struct fio_file *f)
 {
 	assert(f->flags & FIO_FILE_OPEN);
 	f->references++;
 }

 void put_file(struct thread_data *td, struct fio_file *f)
 {
 	if (!(f->flags & FIO_FILE_OPEN))
 		return;

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

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

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

 	td->nr_open_files--;
 	f->flags &= ~FIO_FILE_OPEN;
 }

 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;

 		if ((ret = recurse_dir(td, full_path)) != 0)
 			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;
 	size_t bytes;

 	if (!org->files)
 		return;

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

 	for_each_file(td, f, i) {
 		if (f->file_name)
 			f->file_name = strdup(f->file_name);
 	}
 }

 /*
  * 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;
 }
	#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"

	static int root_warn;

	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;

	/*
	* 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))
	new_layout = 1;
	if (td_write(td) && !td->o.overwrite)
	unlink_file = 1;

	if ((unlink_file \|\| new_layout) && (f->flags & FIO_FILE_EXISTS)) {
	if (unlink(f->file_name) < 0) {
	td_verror(td, errno, "unlink");
	return 1;
	}
	}

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

	f->fd = open(f->file_name, flags, 0644);
	if (f->fd < 0) {
	td_verror(td, errno, "open");
	return 1;
	}

	if (ftruncate(f->fd, f->real_file_size) == -1) {
	td_verror(td, errno, "ftruncate");
	goto err;
	}

	if (!new_layout)
	goto done;

	if (posix_fallocate(f->fd, 0, f->real_file_size) < 0) {
	td_verror(td, errno, "posix_fallocate");
	goto err;
	}

	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 == (int) bs) {
	left -= bs;
	continue;
	} else {
	if (r < 0)
	td_verror(td, errno, "write");
	else
	td_verror(td, EIO, "write");

	break;
	}
	}

	if (td->terminate)
	unlink(f->file_name);
	else if (td->o.create_fsync)
	fsync(f->fd);

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

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

	r = os_random_long(&td->file_size_state);
	ret = td->o.file_size_low + (unsigned long long) ((double) (td->o.file_size_high - td->o.file_size_low) * (r / (RAND_MAX + 1.0)));
	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 (fstat(f->fd, &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;

	r = blockdev_size(f->fd, &bytes);
	if (r) {
	td_verror(td, r, "blockdev_size");
	return 1;
	}

	f->real_file_size = bytes;
	return 0;
	}

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

	if (f->flags & FIO_SIZE_KNOWN)
	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;
	}

	f->flags \|= FIO_SIZE_KNOWN;
	return 0;
	}

	int file_invalidate_cache(struct thread_data td, struct fio_file f)
	{
	int ret = 0;

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

	/*
	* FIXME: add blockdev flushing too
	*/
	if (f->mmap)
	ret = madvise(f->mmap, f->io_size, MADV_DONTNEED);
	else if (f->filetype == FIO_TYPE_FILE)
	ret = fadvise(f->fd, f->file_offset, f->io_size, 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;
	}

	return ret;
	}

	void generic_close_file(struct thread_data fio_unused td, struct fio_file f)
	{
	close(f->fd);
	f->fd = -1;
	}

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

	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 (td_write(td)) {
	flags \|= O_RDWR;

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

	if (is_std)
	f->fd = dup(STDOUT_FILENO);
	else
	f->fd = open(f->file_name, flags, 0600);
	} else {
	if (f->filetype == FIO_TYPE_CHAR)
	flags \|= O_RDWR;
	else
	flags \|= O_RDONLY;

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

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

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

	td_verror(td, __e, buf);
	}

	if (get_file_size(td, f))
	goto err;

	return 0;
	err:
	close(f->fd);
	return 1;
	}

	int open_files(struct thread_data *td)
	{
	struct fio_file *f;
	unsigned int i;
	int err = 0;

	for_each_file(td, f, i) {
	err = td_io_open_file(td, f);
	if (err) {
	if (td->error == EMFILE) {
	log_err("fio: limited open files to: %d\n", td->nr_open_files);
	td->o.open_files = td->nr_open_files;
	err = 0;
	clear_error(td);
	}
	break;
	}

	if (td->o.open_files == td->nr_open_files)
	break;
	}

	if (!err)
	return 0;

	for_each_file(td, f, i)
	td_io_close_file(td, f);

	return err;
	}

	/*
	* 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) {
	if (td->io_ops->open_file(td, f)) {
	if (td->error != ENOENT) {
	log_err("%s\n", td->verror);
	err = 1;
	}
	clear_error(td);
	} else {
	if (td->io_ops->close_file)
	td->io_ops->close_file(td, f);
	}

	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;

	/*
	* 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) {
	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) {
	if (f->file_offset > f->real_file_size)
	goto err_offset;
	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 if (f->file_offset > f->real_file_size)
	goto err_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)) {
	need_extend++;
	extend_size += (f->io_size + f->file_offset);
	f->flags \|= FIO_FILE_EXTEND;
	}
	}

	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;
	log_info("%s: Laying out IO file(s) (%u files / %LuMiB)\n",
	td->o.name, need_extend, extend_size >> 20);

	for_each_file(td, f, i) {
	if (!(f->flags & FIO_FILE_EXTEND))
	continue;

	assert(f->filetype == FIO_TYPE_FILE);
	f->flags &= ~FIO_FILE_EXTEND;
	f->real_file_size = (f->io_size + f->file_offset);
	err = extend_file(td, f);
	if (err)
	break;
	}
	temp_stall_ts = 0;
	}

	if (err)
	return err;

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

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

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

	for_each_file(td, f, i) {
	blocks = (f->real_file_size + td->o.rw_min_bs - 1) / td->o.rw_min_bs;
	num_maps = (blocks + BLOCKS_PER_MAP-1)/ BLOCKS_PER_MAP;
	f->file_map = malloc(num_maps * sizeof(long));
	if (!f->file_map) {
	log_err("fio: failed allocating random map. If running a large number of jobs, try the 'norandommap' option\n");
	return 1;
	}
	f->num_maps = num_maps;
	memset(f->file_map, 0, num_maps * sizeof(long));
	}

	return 0;
	}

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

	for_each_file(td, f, i) {
	if (td->o.unlink && f->filetype == FIO_TYPE_FILE)
	unlink(f->file_name);

	td_io_close_file(td, f);

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

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

	td->o.filename = NULL;
	free(td->files);
	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;

	td->files = realloc(td->files, (cur_files + 1) * sizeof(*f));

	f = &td->files[cur_files];
	memset(f, 0, sizeof(*f));
	f->fd = -1;

	/*
	* 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 = strdup(file_name);

	get_file_type(f);

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

	return cur_files;
	}

	void get_file(struct fio_file *f)
	{
	assert(f->flags & FIO_FILE_OPEN);
	f->references++;
	}

	void put_file(struct thread_data td, struct fio_file f)
	{
	if (!(f->flags & FIO_FILE_OPEN))
	return;

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

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

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

	td->nr_open_files--;
	f->flags &= ~FIO_FILE_OPEN;
	}

	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;

	if ((ret = recurse_dir(td, full_path)) != 0)
	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;
	size_t bytes;

	if (!org->files)
	return;

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

	for_each_file(td, f, i) {
	if (f->file_name)
	f->file_name = strdup(f->file_name);
	}
	}

	/*
	* 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;
	}