[fio.git] / 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 "os.h"

/*
 * Check if the file exists and it's large enough.
 */
static int file_ok(struct thread_data *td, struct fio_file *f)
{
	struct stat st;

	if (f->filetype != FIO_TYPE_FILE ||
	    (td->io_ops->flags & FIO_DISKLESSIO))
		return 0;

	if (lstat(f->file_name, &st) == -1)
		return 1;

	/*
	 * if it's a special file, size is always ok for now
	 */
	if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))
		return 0;
	if (st.st_size < (off_t) f->file_size)
		return 1;

	return 0;
}

static int create_file(struct thread_data *td, struct fio_file *f)
{
	unsigned long long left;
	unsigned int bs;
	char *b;
	int r;

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

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

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

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

	left = f->file_size;
	while (left && !td->terminate) {
		bs = td->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->create_fsync)
		fsync(f->fd);

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

static unsigned long long set_rand_file_size(struct thread_data *td,
					     unsigned long long total_size)
{
	unsigned long long upper = total_size;
	unsigned long long ret;
	long r;

	if (upper > td->file_size_high)
		upper = td->file_size_high;
	else if (upper < td->file_size_low)
		return 0;
	else if (!upper)
		return 0;

	r = os_random_long(&td->file_size_state);
	ret = td->file_size_low + (unsigned long long) ((double) upper * (r / (RAND_MAX + 1.0)));
	ret -= (ret % td->rw_min_bs);
	if (ret > upper)
		ret = upper;
	return ret;
}

static int create_files(struct thread_data *td)
{
	struct fio_file *f;
	int err, need_create, can_extend;
	unsigned long long total_file_size, local_file_size;
	unsigned int i, new_files;

	new_files = 0;
	total_file_size = td->total_file_size;
	for_each_file(td, f, i) {
		unsigned long long s;

		f->file_offset = td->start_offset;

		if (f->filetype != FIO_TYPE_FILE)
			continue;

		if (f->flags & FIO_FILE_EXISTS) {
			s = f->file_size;
			if (s > total_file_size)
				s = total_file_size;

			total_file_size -= s;
		} else
			new_files++;
	}

	/*
	 * unless specifically asked for overwrite, let normal io extend it
	 */
	can_extend = !td->overwrite && !(td->io_ops->flags & FIO_NOEXTEND);
	if (can_extend)
		return 0;

	local_file_size = total_file_size;
	if (!local_file_size)
		local_file_size = -1;

	total_file_size = 0;
	need_create = 0;
	for_each_file(td, f, i) {
		int file_there;

		if (f->filetype != FIO_TYPE_FILE)
			continue;
		if (f->flags & FIO_FILE_EXISTS) {
			total_file_size += f->file_size;
			continue;
		}

		if (!td->file_size_low)
			f->file_size = total_file_size / new_files;
		else {
			/*
			 * If we don't have enough space left for a file
			 * of the minimum size, bail.
			 */
			if (local_file_size < td->file_size_low) {
				log_info("fio: limited to %d files\n", i);
				new_files -= (td->nr_files - i);
				td->nr_files = i;
				break;
			}

			f->file_size = set_rand_file_size(td, local_file_size);
			local_file_size -= f->file_size;
		}

		total_file_size += f->file_size;
		file_there = !file_ok(td, f);

		if (file_there && td_write(td) && !td->overwrite) {
			unlink(f->file_name);
			file_there = 0;
		}

		need_create += !file_there;
	}

	if (!need_create)
		return 0;

	if (!td->total_file_size) {
		log_err("Need size for create\n");
		td_verror(td, EINVAL, "file_size");
		return 1;
	}

	temp_stall_ts = 1;
	log_info("%s: Laying out IO file(s) (%u files / %LuMiB)\n",
				td->name, new_files, total_file_size >> 20);

	err = 0;
	for_each_file(td, f, i) {
		/*
		 * Only unlink files that we created.
		 */
		f->flags &= ~FIO_FILE_UNLINK;
		if (file_ok(td, f)) {
			if (td->unlink)
				f->flags |= FIO_FILE_UNLINK;

			err = create_file(td, f);
			if (err)
				break;
		}
	}

	temp_stall_ts = 0;
	return err;
}

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

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

		f->real_file_size = st.st_size;

		if (!f->file_size || f->file_size > f->real_file_size)
			f->file_size = f->real_file_size;
	} else
		f->real_file_size = f->file_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;

	/*
	 * no extend possibilities, so limit size to device size if too large
	 */
	if (!f->file_size || f->file_size > f->real_file_size)
		f->file_size = f->real_file_size;

	f->file_size -= f->file_offset;
	return 0;
}

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

	if (f->filetype == FIO_TYPE_FILE) {
		if (!(f->flags & FIO_FILE_EXISTS))
			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->name, f->file_offset, f->real_file_size);
		return 1;
	}

	return 0;
}

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

	if (td->odirect)
		return 0;

	/*
	 * FIXME: add blockdev flushing too
	 */
	if (f->mmap)
		ret = madvise(f->mmap, f->file_size, MADV_DONTNEED);
	else if (f->filetype == FIO_TYPE_FILE) {
		ret = fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED);
	} else if (f->filetype == FIO_TYPE_BD) {
		ret = blockdev_invalidate_cache(f->fd);
	} else if (f->filetype == FIO_TYPE_CHAR)
		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 flags = 0;

	if (td->odirect)
		flags |= OS_O_DIRECT;
	if (td->sync_io)
		flags |= O_SYNC;

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

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

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

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

	if (f->fd == -1) {
		int __e = errno;

		td_verror(td, __e, "open");
		if (__e == EINVAL && td->odirect)
			log_err("fio: destination does not support O_DIRECT\n");
		if (__e == EMFILE)
			log_err("fio: try reducing/setting openfiles (failed at %u of %u)\n", td->nr_open_files, td->nr_files);
		return 1;
	}

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

	if (td->invalidate_cache && file_invalidate_cache(td, f))
		goto err;

	if (!td_random(td)) {
		if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) {
			td_verror(td, errno, "fadvise");
			goto err;
		}
	} else {
		if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) {
			td_verror(td, errno, "fadvise");
			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)
			break;

		if (td->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;
}

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

	/*
	 * if ioengine defines a setup() method, it's responsible for
	 * setting up everything in the td->files[] area.
	 */
	if (td->io_ops->setup)
		return td->io_ops->setup(td);

	if (create_files(td))
		return 1;

	err = open_files(td);
	if (err)
		return err;

	/*
	 * Recalculate the total file size now that files are set up.
	 */
	td->total_file_size = 0;
	for_each_file(td, f, i)
		td->total_file_size += f->file_size;

	td->io_size = td->total_file_size;
	if (td->io_size == 0) {
		log_err("%s: no io blocks\n", td->name);
		td_verror(td, EINVAL, "total_file_size");
		return 1;
	}

	if (!td->zone_size)
		td->zone_size = td->io_size;

	td->total_io_size = td->io_size * td->loops;

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

	return err;
}

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

	for_each_file(td, f, i) {
		if (!f->file_name && (f->flags & FIO_FILE_UNLINK) &&
		    f->filetype == FIO_TYPE_FILE) {
			unlink(f->file_name);
			free(f->file_name);
			f->file_name = NULL;
		}

		td_io_close_file(td, f);

		if (f->file_map)
			free(f->file_map);
	}

	td->filename = NULL;
	td->files = NULL;
	td->nr_files = 0;
}

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

	f->filetype = FIO_TYPE_FILE;

	if (!lstat(f->file_name, &sb)) {
		f->flags |= FIO_FILE_EXISTS;

		if (S_ISBLK(sb.st_mode))
			f->filetype = FIO_TYPE_BD;
		else if (S_ISCHR(sb.st_mode))
			f->filetype = FIO_TYPE_CHAR;
		else {
			/*
			 * might as well do this here, and save a stat later on
			 */
			f->real_file_size = sb.st_size;
			f->file_size = f->real_file_size;
		}
	}
}

void add_file(struct thread_data *td, const char *fname)
{
	int cur_files = td->files_index;
	struct fio_file *f;

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

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

	get_file_type(f);

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

void get_file(struct fio_file *f)
{
	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->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) {
		td_verror(td, errno, "opendir");
		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->nr_files++;
			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)
{
	return recurse_dir(td, path);
}
Commit	Line	Data
	1	#include <unistd.h>
	2	#include <fcntl.h>
	3	#include <string.h>
	4	#include <assert.h>
	5	#include <dirent.h>
	6	#include <sys/stat.h>
	7	#include <sys/mman.h>
	8	#include <sys/types.h>
	9
	10	#include "fio.h"
	11	#include "os.h"
	12
	13	/*
	14	* Check if the file exists and it's large enough.
	15	*/
	16	static int file_ok(struct thread_data td, struct fio_file f)
	17	{
	18	struct stat st;
	19
	20	if (f->filetype != FIO_TYPE_FILE \|\|
	21	(td->io_ops->flags & FIO_DISKLESSIO))
	22	return 0;
	23
	24	if (lstat(f->file_name, &st) == -1)
	25	return 1;
	26
	27	/*
	28	* if it's a special file, size is always ok for now
	29	*/
	30	if (S_ISCHR(st.st_mode) \|\| S_ISBLK(st.st_mode))
	31	return 0;
	32	if (st.st_size < (off_t) f->file_size)
	33	return 1;
	34
	35	return 0;
	36	}
	37
	38	static int create_file(struct thread_data td, struct fio_file f)
	39	{
	40	unsigned long long left;
	41	unsigned int bs;
	42	char *b;
	43	int r;
	44
	45	f->fd = open(f->file_name, O_WRONLY \| O_CREAT \| O_TRUNC, 0644);
	46	if (f->fd < 0) {
	47	td_verror(td, errno, "open");
	48	return 1;
	49	}
	50
	51	if (ftruncate(f->fd, f->file_size) == -1) {
	52	td_verror(td, errno, "ftruncate");
	53	goto err;
	54	}
	55
	56	if (posix_fallocate(f->fd, 0, f->file_size) < 0) {
	57	td_verror(td, errno, "posix_fallocate");
	58	goto err;
	59	}
	60
	61	b = malloc(td->max_bs[DDIR_WRITE]);
	62	memset(b, 0, td->max_bs[DDIR_WRITE]);
	63
	64	left = f->file_size;
	65	while (left && !td->terminate) {
	66	bs = td->max_bs[DDIR_WRITE];
	67	if (bs > left)
	68	bs = left;
	69
	70	r = write(f->fd, b, bs);
	71
	72	if (r == (int) bs) {
	73	left -= bs;
	74	continue;
	75	} else {
	76	if (r < 0)
	77	td_verror(td, errno, "write");
	78	else
	79	td_verror(td, EIO, "write");
	80
	81	break;
	82	}
	83	}
	84
	85	if (td->terminate)
	86	unlink(f->file_name);
	87	else if (td->create_fsync)
	88	fsync(f->fd);
	89
	90	free(b);
	91	close(f->fd);
	92	f->fd = -1;
	93	return 0;
	94	err:
	95	close(f->fd);
	96	f->fd = -1;
	97	return 1;
	98	}
	99
	100	static unsigned long long set_rand_file_size(struct thread_data *td,
	101	unsigned long long total_size)
	102	{
	103	unsigned long long upper = total_size;
	104	unsigned long long ret;
	105	long r;
	106
	107	if (upper > td->file_size_high)
	108	upper = td->file_size_high;
	109	else if (upper < td->file_size_low)
	110	return 0;
	111	else if (!upper)
	112	return 0;
	113
	114	r = os_random_long(&td->file_size_state);
	115	ret = td->file_size_low + (unsigned long long) ((double) upper * (r / (RAND_MAX + 1.0)));
	116	ret -= (ret % td->rw_min_bs);
	117	if (ret > upper)
	118	ret = upper;
	119	return ret;
	120	}
	121
	122	static int create_files(struct thread_data *td)
	123	{
	124	struct fio_file *f;
	125	int err, need_create, can_extend;
	126	unsigned long long total_file_size, local_file_size;
	127	unsigned int i, new_files;
	128
	129	new_files = 0;
	130	total_file_size = td->total_file_size;
	131	for_each_file(td, f, i) {
	132	unsigned long long s;
	133
	134	f->file_offset = td->start_offset;
	135
	136	if (f->filetype != FIO_TYPE_FILE)
	137	continue;
	138
	139	if (f->flags & FIO_FILE_EXISTS) {
	140	s = f->file_size;
	141	if (s > total_file_size)
	142	s = total_file_size;
	143
	144	total_file_size -= s;
	145	} else
	146	new_files++;
	147	}
	148
	149	/*
	150	* unless specifically asked for overwrite, let normal io extend it
	151	*/
	152	can_extend = !td->overwrite && !(td->io_ops->flags & FIO_NOEXTEND);
	153	if (can_extend)
	154	return 0;
	155
	156	local_file_size = total_file_size;
	157	if (!local_file_size)
	158	local_file_size = -1;
	159
	160	total_file_size = 0;
	161	need_create = 0;
	162	for_each_file(td, f, i) {
	163	int file_there;
	164
	165	if (f->filetype != FIO_TYPE_FILE)
	166	continue;
	167	if (f->flags & FIO_FILE_EXISTS) {
	168	total_file_size += f->file_size;
	169	continue;
	170	}
	171
	172	if (!td->file_size_low)
	173	f->file_size = total_file_size / new_files;
	174	else {
	175	/*
	176	* If we don't have enough space left for a file
	177	* of the minimum size, bail.
	178	*/
	179	if (local_file_size < td->file_size_low) {
	180	log_info("fio: limited to %d files\n", i);
	181	new_files -= (td->nr_files - i);
	182	td->nr_files = i;
	183	break;
	184	}
	185
	186	f->file_size = set_rand_file_size(td, local_file_size);
	187	local_file_size -= f->file_size;
	188	}
	189
	190	total_file_size += f->file_size;
	191	file_there = !file_ok(td, f);
	192
	193	if (file_there && td_write(td) && !td->overwrite) {
	194	unlink(f->file_name);
	195	file_there = 0;
	196	}
	197
	198	need_create += !file_there;
	199	}
	200
	201	if (!need_create)
	202	return 0;
	203
	204	if (!td->total_file_size) {
	205	log_err("Need size for create\n");
	206	td_verror(td, EINVAL, "file_size");
	207	return 1;
	208	}
	209
	210	temp_stall_ts = 1;
	211	log_info("%s: Laying out IO file(s) (%u files / %LuMiB)\n",
	212	td->name, new_files, total_file_size >> 20);
	213
	214	err = 0;
	215	for_each_file(td, f, i) {
	216	/*
	217	* Only unlink files that we created.
	218	*/
	219	f->flags &= ~FIO_FILE_UNLINK;
	220	if (file_ok(td, f)) {
	221	if (td->unlink)
	222	f->flags \|= FIO_FILE_UNLINK;
	223
	224	err = create_file(td, f);
	225	if (err)
	226	break;
	227	}
	228	}
	229
	230	temp_stall_ts = 0;
	231	return err;
	232	}
	233
	234	static int file_size(struct thread_data td, struct fio_file f)
	235	{
	236	struct stat st;
	237
	238	if (td->overwrite) {
	239	if (fstat(f->fd, &st) == -1) {
	240	td_verror(td, errno, "fstat");
	241	return 1;
	242	}
	243
	244	f->real_file_size = st.st_size;
	245
	246	if (!f->file_size \|\| f->file_size > f->real_file_size)
	247	f->file_size = f->real_file_size;
	248	} else
	249	f->real_file_size = f->file_size;
	250
	251	return 0;
	252	}
	253
	254	static int bdev_size(struct thread_data td, struct fio_file f)
	255	{
	256	unsigned long long bytes;
	257	int r;
	258
	259	r = blockdev_size(f->fd, &bytes);
	260	if (r) {
	261	td_verror(td, r, "blockdev_size");
	262	return 1;
	263	}
	264
	265	f->real_file_size = bytes;
	266
	267	/*
	268	* no extend possibilities, so limit size to device size if too large
	269	*/
	270	if (!f->file_size \|\| f->file_size > f->real_file_size)
	271	f->file_size = f->real_file_size;
	272
	273	f->file_size -= f->file_offset;
	274	return 0;
	275	}
	276
	277	static int get_file_size(struct thread_data td, struct fio_file f)
	278	{
	279	int ret = 0;
	280
	281	if (f->filetype == FIO_TYPE_FILE) {
	282	if (!(f->flags & FIO_FILE_EXISTS))
	283	ret = file_size(td, f);
	284	} else if (f->filetype == FIO_TYPE_BD)
	285	ret = bdev_size(td, f);
	286	else
	287	f->real_file_size = -1;
	288
	289	if (ret)
	290	return ret;
	291
	292	if (f->file_offset > f->real_file_size) {
	293	log_err("%s: offset extends end (%Lu > %Lu)\n", td->name, f->file_offset, f->real_file_size);
	294	return 1;
	295	}
	296
	297	return 0;
	298	}
	299
	300	int file_invalidate_cache(struct thread_data td, struct fio_file f)
	301	{
	302	int ret = 0;
	303
	304	if (td->odirect)
	305	return 0;
	306
	307	/*
	308	* FIXME: add blockdev flushing too
	309	*/
	310	if (f->mmap)
	311	ret = madvise(f->mmap, f->file_size, MADV_DONTNEED);
	312	else if (f->filetype == FIO_TYPE_FILE) {
	313	ret = fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED);
	314	} else if (f->filetype == FIO_TYPE_BD) {
	315	ret = blockdev_invalidate_cache(f->fd);
	316	} else if (f->filetype == FIO_TYPE_CHAR)
	317	ret = 0;
	318
	319	if (ret < 0) {
	320	td_verror(td, errno, "invalidate_cache");
	321	return 1;
	322	}
	323
	324	return ret;
	325	}
	326
	327	void generic_close_file(struct thread_data fio_unused td, struct fio_file f)
	328	{
	329	close(f->fd);
	330	f->fd = -1;
	331	}
	332
	333	int generic_open_file(struct thread_data td, struct fio_file f)
	334	{
	335	int flags = 0;
	336
	337	if (td->odirect)
	338	flags \|= OS_O_DIRECT;
	339	if (td->sync_io)
	340	flags \|= O_SYNC;
	341
	342	if (td_write(td) \|\| td_rw(td)) {
	343	flags \|= O_RDWR;
	344
	345	if (f->filetype == FIO_TYPE_FILE)
	346	flags \|= O_CREAT;
	347
	348	f->fd = open(f->file_name, flags, 0600);
	349	} else {
	350	if (f->filetype == FIO_TYPE_CHAR)
	351	flags \|= O_RDWR;
	352	else
	353	flags \|= O_RDONLY;
	354
	355	f->fd = open(f->file_name, flags);
	356	}
	357
	358	if (f->fd == -1) {
	359	int __e = errno;
	360
	361	td_verror(td, __e, "open");
	362	if (__e == EINVAL && td->odirect)
	363	log_err("fio: destination does not support O_DIRECT\n");
	364	if (__e == EMFILE)
	365	log_err("fio: try reducing/setting openfiles (failed at %u of %u)\n", td->nr_open_files, td->nr_files);
	366	return 1;
	367	}
	368
	369	if (get_file_size(td, f))
	370	goto err;
	371
	372	if (td->invalidate_cache && file_invalidate_cache(td, f))
	373	goto err;
	374
	375	if (!td_random(td)) {
	376	if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) {
	377	td_verror(td, errno, "fadvise");
	378	goto err;
	379	}
	380	} else {
	381	if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) {
	382	td_verror(td, errno, "fadvise");
	383	goto err;
	384	}
	385	}
	386
	387	return 0;
	388	err:
	389	close(f->fd);
	390	return 1;
	391	}
	392
	393	int open_files(struct thread_data *td)
	394	{
	395	struct fio_file *f;
	396	unsigned int i;
	397	int err = 0;
	398
	399	for_each_file(td, f, i) {
	400	err = td_io_open_file(td, f);
	401	if (err)
	402	break;
	403
	404	if (td->open_files == td->nr_open_files)
	405	break;
	406	}
	407
	408	if (!err)
	409	return 0;
	410
	411	for_each_file(td, f, i)
	412	td_io_close_file(td, f);
	413
	414	return err;
	415	}
	416
	417	int setup_files(struct thread_data *td)
	418	{
	419	struct fio_file *f;
	420	unsigned int i;
	421	int err;
	422
	423	/*
	424	* if ioengine defines a setup() method, it's responsible for
	425	* setting up everything in the td->files[] area.
	426	*/
	427	if (td->io_ops->setup)
	428	return td->io_ops->setup(td);
	429
	430	if (create_files(td))
	431	return 1;
	432
	433	err = open_files(td);
	434	if (err)
	435	return err;
	436
	437	/*
	438	* Recalculate the total file size now that files are set up.
	439	*/
	440	td->total_file_size = 0;
	441	for_each_file(td, f, i)
	442	td->total_file_size += f->file_size;
	443
	444	td->io_size = td->total_file_size;
	445	if (td->io_size == 0) {
	446	log_err("%s: no io blocks\n", td->name);
	447	td_verror(td, EINVAL, "total_file_size");
	448	return 1;
	449	}
	450
	451	if (!td->zone_size)
	452	td->zone_size = td->io_size;
	453
	454	td->total_io_size = td->io_size * td->loops;
	455
	456	for_each_file(td, f, i)
	457	td_io_close_file(td, f);
	458
	459	return err;
	460	}
	461
	462	void close_files(struct thread_data *td)
	463	{
	464	struct fio_file *f;
	465	unsigned int i;
	466
	467	for_each_file(td, f, i) {
	468	if (!f->file_name && (f->flags & FIO_FILE_UNLINK) &&
	469	f->filetype == FIO_TYPE_FILE) {
	470	unlink(f->file_name);
	471	free(f->file_name);
	472	f->file_name = NULL;
	473	}
	474
	475	td_io_close_file(td, f);
	476
	477	if (f->file_map)
	478	free(f->file_map);
	479	}
	480
	481	td->filename = NULL;
	482	td->files = NULL;
	483	td->nr_files = 0;
	484	}
	485
	486	static void get_file_type(struct fio_file *f)
	487	{
	488	struct stat sb;
	489
	490	f->filetype = FIO_TYPE_FILE;
	491
	492	if (!lstat(f->file_name, &sb)) {
	493	f->flags \|= FIO_FILE_EXISTS;
	494
	495	if (S_ISBLK(sb.st_mode))
	496	f->filetype = FIO_TYPE_BD;
	497	else if (S_ISCHR(sb.st_mode))
	498	f->filetype = FIO_TYPE_CHAR;
	499	else {
	500	/*
	501	* might as well do this here, and save a stat later on
	502	*/
	503	f->real_file_size = sb.st_size;
	504	f->file_size = f->real_file_size;
	505	}
	506	}
	507	}
	508
	509	void add_file(struct thread_data td, const char fname)
	510	{
	511	int cur_files = td->files_index;
	512	struct fio_file *f;
	513
	514	td->files = realloc(td->files, (cur_files + 1) * sizeof(*f));
	515
	516	f = &td->files[cur_files];
	517	memset(f, 0, sizeof(*f));
	518	f->fd = -1;
	519	f->file_name = strdup(fname);
	520
	521	get_file_type(f);
	522
	523	td->files_index++;
	524	if (f->filetype == FIO_TYPE_FILE)
	525	td->nr_normal_files++;
	526	}
	527
	528	void get_file(struct fio_file *f)
	529	{
	530	f->references++;
	531	}
	532
	533	void put_file(struct thread_data td, struct fio_file f)
	534	{
	535	if (!(f->flags & FIO_FILE_OPEN))
	536	return;
	537
	538	assert(f->references);
	539	if (--f->references)
	540	return;
	541
	542	if (should_fsync(td) && td->fsync_on_close)
	543	fsync(f->fd);
	544
	545	if (td->io_ops->close_file)
	546	td->io_ops->close_file(td, f);
	547	td->nr_open_files--;
	548	f->flags &= ~FIO_FILE_OPEN;
	549	}
	550
	551	static int recurse_dir(struct thread_data td, const char dirname)
	552	{
	553	struct dirent *dir;
	554	int ret = 0;
	555	DIR *D;
	556
	557	D = opendir(dirname);
	558	if (!D) {
	559	td_verror(td, errno, "opendir");
	560	return 1;
	561	}
	562
	563	while ((dir = readdir(D)) != NULL) {
	564	char full_path[PATH_MAX];
	565	struct stat sb;
	566
	567	if (!strcmp(dir->d_name, ".") \|\| !strcmp(dir->d_name, ".."))
	568	continue;
	569
	570	sprintf(full_path, "%s/%s", dirname, dir->d_name);
	571
	572	if (lstat(full_path, &sb) == -1) {
	573	if (errno != ENOENT) {
	574	td_verror(td, errno, "stat");
	575	return 1;
	576	}
	577	}
	578
	579	if (S_ISREG(sb.st_mode)) {
	580	add_file(td, full_path);
	581	td->nr_files++;
	582	continue;
	583	}
	584
	585	if ((ret = recurse_dir(td, full_path)) != 0)
	586	break;
	587	}
	588
	589	closedir(D);
	590	return ret;
	591	}
	592
	593	int add_dir_files(struct thread_data td, const char path)
	594	{
	595	return recurse_dir(td, path);
	596	}