[fio.git] / filesetup.c

#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <assert.h>
#include <sys/stat.h>
#include <sys/mman.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 (td->filetype != FIO_TYPE_FILE || (td->io_ops->flags & FIO_NULLIO))
		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);
		return 1;
	}

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

	if (posix_fallocate(f->fd, 0, f->file_size) < 0) {
		td_verror(td, errno);
		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);
			else
				td_verror(td, EIO);

			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 int create_files(struct thread_data *td)
{
	struct fio_file *f;
	int i, err, need_create;

	for_each_file(td, f, i)
		f->file_size = td->total_file_size / td->nr_files;

	/*
	 * unless specifically asked for overwrite, let normal io extend it
	 */
	if (!td->overwrite)
		return 0;

	need_create = 0;
	if (td->filetype == FIO_TYPE_FILE) {
		for_each_file(td, f, i) {
			int file_there = !file_ok(td, f);

			if (file_there && td->ddir == DDIR_WRITE &&
			    !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);
		return 1;
	}

	temp_stall_ts = 1;
	fprintf(f_out, "%s: Laying out IO file(s) (%u x %LuMiB == %LuMiB)\n",
				td->name, td->nr_uniq_files,
				(td->total_file_size >> 20) / td->nr_uniq_files,
				td->total_file_size >> 20);

	err = 0;
	for_each_file(td, f, i) {
		/*
		 * Only unlink files that we created.
		 */
		f->unlink = 0;
		if (file_ok(td, f)) {
			f->unlink = td->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 we are not doing real io, just pretend the file is as large
	 * as the size= given. this works fine with nrfiles > 1 as well,
	 * we only really care about it being at least as big as size=
	 */
	if (td->io_ops->flags & FIO_NULLIO) {
		f->real_file_size = f->file_size = td->total_file_size;
		return 0;
	}

	if (td->overwrite) {
		if (fstat(f->fd, &st) == -1) {
			td_verror(td, errno);
			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);
		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 (td->filetype == FIO_TYPE_FILE)
		ret = file_size(td, f);
	else if (td->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;

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

	if (ret < 0) {
		td_verror(td, errno);
		return 1;
	}

	return 0;
}

static int __setup_file_mmap(struct thread_data *td, struct fio_file *f)
{
	int flags;

	if (td_rw(td))
		flags = PROT_READ | PROT_WRITE;
	else if (td_write(td)) {
		flags = PROT_WRITE;

		if (td->verify != VERIFY_NONE)
			flags |= PROT_READ;
	} else
		flags = PROT_READ;

	f->mmap = mmap(NULL, f->file_size, flags, MAP_SHARED, f->fd, f->file_offset);
	if (f->mmap == MAP_FAILED) {
		f->mmap = NULL;
		td_verror(td, errno);
		return 1;
	}

	if (td->invalidate_cache && file_invalidate_cache(td, f))
		return 1;

	if (td->sequential) {
		if (madvise(f->mmap, f->file_size, MADV_SEQUENTIAL) < 0) {
			td_verror(td, errno);
			return 1;
		}
	} else {
		if (madvise(f->mmap, f->file_size, MADV_RANDOM) < 0) {
			td_verror(td, errno);
			return 1;
		}
	}

	return 0;
}

static int setup_files_mmap(struct thread_data *td)
{
	struct fio_file *f;
	int i, err = 0;

	for_each_file(td, f, i) {
		err = __setup_file_mmap(td, f);
		if (err)
			break;
	}

	return err;
}

static int __setup_file_plain(struct thread_data *td, struct fio_file *f)
{
	if (td->invalidate_cache && file_invalidate_cache(td, f))
		return 1;

	if (td->sequential) {
		if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) {
			td_verror(td, errno);
			return 1;
		}
	} else {
		if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) {
			td_verror(td, errno);
			return 1;
		}
	}

	return 0;
}

static int setup_files_plain(struct thread_data *td)
{
	struct fio_file *f;
	int i, err = 0;

	for_each_file(td, f, i) {
		err = __setup_file_plain(td, f);
		if (err)
			break;
	}

	return err;
}

static int setup_file(struct thread_data *td, struct fio_file *f)
{
	int flags = 0;

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

	/*
	 * we need a valid file descriptor, but don't create a real file.
	 * lets just dup stdout, seems like a sensible approach.
	 */
	if (td->io_ops->flags & FIO_NULLIO)
		f->fd = dup(STDOUT_FILENO);
	else {
		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 (td->filetype == FIO_TYPE_FILE) {
				if (!td->overwrite)
					flags |= O_TRUNC;

				flags |= O_CREAT;
			}

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

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

	if (f->fd == -1) {
		td_verror(td, errno);
		return 1;
	}

	if (get_file_size(td, f))
		return 1;

	return 0;
}

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

	for_each_file(td, f, i) {
		err = setup_file(td, f);
		if (err)
			break;
	}

	if (!err)
		return 0;

	for_each_file(td, f, i) {
		if (f->fd != -1) {
			close(f->fd);
			f->fd = -1;
		}
	}

	return err;
}

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

	/*
	 * 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);
		return 1;
	}

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

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

	if (td->io_ops->flags & FIO_MMAPIO)
		err = setup_files_mmap(td);
	else
		err = setup_files_plain(td);

	for_each_file(td, f, i) {
		if (f->fd != -1) {
			close(f->fd);
			f->fd = -1;
		}
	}

	return err;
}

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

	for_each_file(td, f, i) {
		if (!td->filename && f->unlink &&
		    td->filetype == FIO_TYPE_FILE) {
			unlink(f->file_name);
			free(f->file_name);
			f->file_name = NULL;
		}
		if (f->fd != -1) {
			close(f->fd);
			f->fd = -1;
		}
		if (f->mmap) {
			munmap(f->mmap, f->file_size);
			f->mmap = NULL;
		}
	}

	td->filename = NULL;
	free(td->files);
	td->files = NULL;
	td->nr_files = 0;
}
Commit	Line	Data
	1	#include <unistd.h>
	2	#include <fcntl.h>
	3	#include <string.h>
	4	#include <assert.h>
	5	#include <sys/stat.h>
	6	#include <sys/mman.h>
	7
	8	#include "fio.h"
	9	#include "os.h"
	10
	11	/*
	12	* Check if the file exists and it's large enough.
	13	*/
	14	static int file_ok(struct thread_data td, struct fio_file f)
	15	{
	16	struct stat st;
	17
	18	if (td->filetype != FIO_TYPE_FILE \|\| (td->io_ops->flags & FIO_NULLIO))
	19	return 0;
	20
	21	if (lstat(f->file_name, &st) == -1)
	22	return 1;
	23
	24	/*
	25	* if it's a special file, size is always ok for now
	26	*/
	27	if (S_ISCHR(st.st_mode) \|\| S_ISBLK(st.st_mode))
	28	return 0;
	29	if (st.st_size < (off_t) f->file_size)
	30	return 1;
	31
	32	return 0;
	33	}
	34
	35	static int create_file(struct thread_data td, struct fio_file f)
	36	{
	37	unsigned long long left;
	38	unsigned int bs;
	39	char *b;
	40	int r;
	41
	42	f->fd = open(f->file_name, O_WRONLY \| O_CREAT \| O_TRUNC, 0644);
	43	if (f->fd < 0) {
	44	td_verror(td, errno);
	45	return 1;
	46	}
	47
	48	if (ftruncate(f->fd, f->file_size) == -1) {
	49	td_verror(td, errno);
	50	goto err;
	51	}
	52
	53	if (posix_fallocate(f->fd, 0, f->file_size) < 0) {
	54	td_verror(td, errno);
	55	goto err;
	56	}
	57
	58	b = malloc(td->max_bs[DDIR_WRITE]);
	59	memset(b, 0, td->max_bs[DDIR_WRITE]);
	60
	61	left = f->file_size;
	62	while (left && !td->terminate) {
	63	bs = td->max_bs[DDIR_WRITE];
	64	if (bs > left)
	65	bs = left;
	66
	67	r = write(f->fd, b, bs);
	68
	69	if (r == (int) bs) {
	70	left -= bs;
	71	continue;
	72	} else {
	73	if (r < 0)
	74	td_verror(td, errno);
	75	else
	76	td_verror(td, EIO);
	77
	78	break;
	79	}
	80	}
	81
	82	if (td->terminate)
	83	unlink(f->file_name);
	84	else if (td->create_fsync)
	85	fsync(f->fd);
	86
	87	free(b);
	88	close(f->fd);
	89	f->fd = -1;
	90	return 0;
	91	err:
	92	close(f->fd);
	93	f->fd = -1;
	94	return 1;
	95	}
	96
	97	static int create_files(struct thread_data *td)
	98	{
	99	struct fio_file *f;
	100	int i, err, need_create;
	101
	102	for_each_file(td, f, i)
	103	f->file_size = td->total_file_size / td->nr_files;
	104
	105	/*
	106	* unless specifically asked for overwrite, let normal io extend it
	107	*/
	108	if (!td->overwrite)
	109	return 0;
	110
	111	need_create = 0;
	112	if (td->filetype == FIO_TYPE_FILE) {
	113	for_each_file(td, f, i) {
	114	int file_there = !file_ok(td, f);
	115
	116	if (file_there && td->ddir == DDIR_WRITE &&
	117	!td->overwrite) {
	118	unlink(f->file_name);
	119	file_there = 0;
	120	}
	121
	122	need_create += !file_there;
	123	}
	124	}
	125
	126	if (!need_create)
	127	return 0;
	128
	129	if (!td->total_file_size) {
	130	log_err("Need size for create\n");
	131	td_verror(td, EINVAL);
	132	return 1;
	133	}
	134
	135	temp_stall_ts = 1;
	136	fprintf(f_out, "%s: Laying out IO file(s) (%u x %LuMiB == %LuMiB)\n",
	137	td->name, td->nr_uniq_files,
	138	(td->total_file_size >> 20) / td->nr_uniq_files,
	139	td->total_file_size >> 20);
	140
	141	err = 0;
	142	for_each_file(td, f, i) {
	143	/*
	144	* Only unlink files that we created.
	145	*/
	146	f->unlink = 0;
	147	if (file_ok(td, f)) {
	148	f->unlink = td->unlink;
	149	err = create_file(td, f);
	150	if (err)
	151	break;
	152	}
	153	}
	154
	155	temp_stall_ts = 0;
	156	return err;
	157	}
	158
	159	static int file_size(struct thread_data td, struct fio_file f)
	160	{
	161	struct stat st;
	162
	163	/*
	164	* if we are not doing real io, just pretend the file is as large
	165	* as the size= given. this works fine with nrfiles > 1 as well,
	166	* we only really care about it being at least as big as size=
	167	*/
	168	if (td->io_ops->flags & FIO_NULLIO) {
	169	f->real_file_size = f->file_size = td->total_file_size;
	170	return 0;
	171	}
	172
	173	if (td->overwrite) {
	174	if (fstat(f->fd, &st) == -1) {
	175	td_verror(td, errno);
	176	return 1;
	177	}
	178
	179	f->real_file_size = st.st_size;
	180
	181	if (!f->file_size \|\| f->file_size > f->real_file_size)
	182	f->file_size = f->real_file_size;
	183	} else
	184	f->real_file_size = f->file_size;
	185
	186	return 0;
	187	}
	188
	189	static int bdev_size(struct thread_data td, struct fio_file f)
	190	{
	191	unsigned long long bytes;
	192	int r;
	193
	194	r = blockdev_size(f->fd, &bytes);
	195	if (r) {
	196	td_verror(td, r);
	197	return 1;
	198	}
	199
	200	f->real_file_size = bytes;
	201
	202	/*
	203	* no extend possibilities, so limit size to device size if too large
	204	*/
	205	if (!f->file_size \|\| f->file_size > f->real_file_size)
	206	f->file_size = f->real_file_size;
	207
	208	f->file_size -= f->file_offset;
	209	return 0;
	210	}
	211
	212	static int get_file_size(struct thread_data td, struct fio_file f)
	213	{
	214	int ret = 0;
	215
	216	if (td->filetype == FIO_TYPE_FILE)
	217	ret = file_size(td, f);
	218	else if (td->filetype == FIO_TYPE_BD)
	219	ret = bdev_size(td, f);
	220	else
	221	f->real_file_size = -1;
	222
	223	if (ret)
	224	return ret;
	225
	226	if (f->file_offset > f->real_file_size) {
	227	log_err("%s: offset extends end (%Lu > %Lu)\n", td->name, f->file_offset, f->real_file_size);
	228	return 1;
	229	}
	230
	231	return 0;
	232	}
	233
	234	int file_invalidate_cache(struct thread_data td, struct fio_file f)
	235	{
	236	int ret = 0;
	237
	238	/*
	239	* FIXME: add blockdev flushing too
	240	*/
	241	if (td->io_ops->flags & FIO_MMAPIO)
	242	ret = madvise(f->mmap, f->file_size, MADV_DONTNEED);
	243	else if (td->filetype == FIO_TYPE_FILE)
	244	ret = fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED);
	245	else if (td->filetype == FIO_TYPE_BD)
	246	ret = blockdev_invalidate_cache(f->fd);
	247	else if (td->filetype == FIO_TYPE_CHAR)
	248	ret = 0;
	249
	250	if (ret < 0) {
	251	td_verror(td, errno);
	252	return 1;
	253	}
	254
	255	return 0;
	256	}
	257
	258	static int __setup_file_mmap(struct thread_data td, struct fio_file f)
	259	{
	260	int flags;
	261
	262	if (td_rw(td))
	263	flags = PROT_READ \| PROT_WRITE;
	264	else if (td_write(td)) {
	265	flags = PROT_WRITE;
	266
	267	if (td->verify != VERIFY_NONE)
	268	flags \|= PROT_READ;
	269	} else
	270	flags = PROT_READ;
	271
	272	f->mmap = mmap(NULL, f->file_size, flags, MAP_SHARED, f->fd, f->file_offset);
	273	if (f->mmap == MAP_FAILED) {
	274	f->mmap = NULL;
	275	td_verror(td, errno);
	276	return 1;
	277	}
	278
	279	if (td->invalidate_cache && file_invalidate_cache(td, f))
	280	return 1;
	281
	282	if (td->sequential) {
	283	if (madvise(f->mmap, f->file_size, MADV_SEQUENTIAL) < 0) {
	284	td_verror(td, errno);
	285	return 1;
	286	}
	287	} else {
	288	if (madvise(f->mmap, f->file_size, MADV_RANDOM) < 0) {
	289	td_verror(td, errno);
	290	return 1;
	291	}
	292	}
	293
	294	return 0;
	295	}
	296
	297	static int setup_files_mmap(struct thread_data *td)
	298	{
	299	struct fio_file *f;
	300	int i, err = 0;
	301
	302	for_each_file(td, f, i) {
	303	err = __setup_file_mmap(td, f);
	304	if (err)
	305	break;
	306	}
	307
	308	return err;
	309	}
	310
	311	static int __setup_file_plain(struct thread_data td, struct fio_file f)
	312	{
	313	if (td->invalidate_cache && file_invalidate_cache(td, f))
	314	return 1;
	315
	316	if (td->sequential) {
	317	if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) {
	318	td_verror(td, errno);
	319	return 1;
	320	}
	321	} else {
	322	if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) {
	323	td_verror(td, errno);
	324	return 1;
	325	}
	326	}
	327
	328	return 0;
	329	}
	330
	331	static int setup_files_plain(struct thread_data *td)
	332	{
	333	struct fio_file *f;
	334	int i, err = 0;
	335
	336	for_each_file(td, f, i) {
	337	err = __setup_file_plain(td, f);
	338	if (err)
	339	break;
	340	}
	341
	342	return err;
	343	}
	344
	345	static int setup_file(struct thread_data td, struct fio_file f)
	346	{
	347	int flags = 0;
	348
	349	if (td->io_ops->flags & FIO_NETIO)
	350	return 0;
	351
	352	/*
	353	* we need a valid file descriptor, but don't create a real file.
	354	* lets just dup stdout, seems like a sensible approach.
	355	*/
	356	if (td->io_ops->flags & FIO_NULLIO)
	357	f->fd = dup(STDOUT_FILENO);
	358	else {
	359	if (td->odirect)
	360	flags \|= OS_O_DIRECT;
	361	if (td->sync_io)
	362	flags \|= O_SYNC;
	363
	364	if (td_write(td) \|\| td_rw(td)) {
	365	flags \|= O_RDWR;
	366
	367	if (td->filetype == FIO_TYPE_FILE) {
	368	if (!td->overwrite)
	369	flags \|= O_TRUNC;
	370
	371	flags \|= O_CREAT;
	372	}
	373
	374	f->fd = open(f->file_name, flags, 0600);
	375	} else {
	376	if (td->filetype == FIO_TYPE_CHAR)
	377	flags \|= O_RDWR;
	378	else
	379	flags \|= O_RDONLY;
	380
	381	f->fd = open(f->file_name, flags);
	382	}
	383	}
	384
	385	if (f->fd == -1) {
	386	td_verror(td, errno);
	387	return 1;
	388	}
	389
	390	if (get_file_size(td, f))
	391	return 1;
	392
	393	return 0;
	394	}
	395
	396	int open_files(struct thread_data *td)
	397	{
	398	struct fio_file *f;
	399	int i, err = 0;
	400
	401	for_each_file(td, f, i) {
	402	err = setup_file(td, f);
	403	if (err)
	404	break;
	405	}
	406
	407	if (!err)
	408	return 0;
	409
	410	for_each_file(td, f, i) {
	411	if (f->fd != -1) {
	412	close(f->fd);
	413	f->fd = -1;
	414	}
	415	}
	416
	417	return err;
	418	}
	419
	420	int setup_files(struct thread_data *td)
	421	{
	422	struct fio_file *f;
	423	int err, i;
	424
	425	/*
	426	* if ioengine defines a setup() method, it's responsible for
	427	* setting up everything in the td->files[] area.
	428	*/
	429	if (td->io_ops->setup)
	430	return td->io_ops->setup(td);
	431
	432	if (create_files(td))
	433	return 1;
	434
	435	err = open_files(td);
	436	if (err)
	437	return err;
	438
	439	/*
	440	* Recalculate the total file size now that files are set up.
	441	*/
	442	td->total_file_size = 0;
	443	for_each_file(td, f, i)
	444	td->total_file_size += f->file_size;
	445
	446	td->io_size = td->total_file_size;
	447	if (td->io_size == 0) {
	448	log_err("%s: no io blocks\n", td->name);
	449	td_verror(td, EINVAL);
	450	return 1;
	451	}
	452
	453	if (!td->zone_size)
	454	td->zone_size = td->io_size;
	455
	456	td->total_io_size = td->io_size * td->loops;
	457
	458	if (td->io_ops->flags & FIO_MMAPIO)
	459	err = setup_files_mmap(td);
	460	else
	461	err = setup_files_plain(td);
	462
	463	for_each_file(td, f, i) {
	464	if (f->fd != -1) {
	465	close(f->fd);
	466	f->fd = -1;
	467	}
	468	}
	469
	470	return err;
	471	}
	472
	473	void close_files(struct thread_data *td)
	474	{
	475	struct fio_file *f;
	476	int i;
	477
	478	for_each_file(td, f, i) {
	479	if (!td->filename && f->unlink &&
	480	td->filetype == FIO_TYPE_FILE) {
	481	unlink(f->file_name);
	482	free(f->file_name);
	483	f->file_name = NULL;
	484	}
	485	if (f->fd != -1) {
	486	close(f->fd);
	487	f->fd = -1;
	488	}
	489	if (f->mmap) {
	490	munmap(f->mmap, f->file_size);
	491	f->mmap = NULL;
	492	}
	493	}
	494
	495	td->filename = NULL;
	496	free(td->files);
	497	td->files = NULL;
	498	td->nr_files = 0;
	499	}