[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_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 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_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;
	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 (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 (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;

	if (!td->invalidate_cache)
		return 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 (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, "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 (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) {
		int __e = errno;

		td_verror(td, __e, "open");
		if (__e == EINVAL && td->odirect)
			log_err("fio: destination does not support O_DIRECT\n");
		return 1;
	}

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

	if (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;
	int i, 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;
	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->total_file_size = (td->total_file_size * td->nr_files) / td->open_files;

	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;
	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;
		}

		td_io_close_file(td, f);
	}

	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 \|\|
	19	(td->io_ops->flags & FIO_DISKLESSIO))
	20	return 0;
	21
	22	if (lstat(f->file_name, &st) == -1)
	23	return 1;
	24
	25	/*
	26	* if it's a special file, size is always ok for now
	27	*/
	28	if (S_ISCHR(st.st_mode) \|\| S_ISBLK(st.st_mode))
	29	return 0;
	30	if (st.st_size < (off_t) f->file_size)
	31	return 1;
	32
	33	return 0;
	34	}
	35
	36	static int create_file(struct thread_data td, struct fio_file f)
	37	{
	38	unsigned long long left;
	39	unsigned int bs;
	40	char *b;
	41	int r;
	42
	43	f->fd = open(f->file_name, O_WRONLY \| O_CREAT \| O_TRUNC, 0644);
	44	if (f->fd < 0) {
	45	td_verror(td, errno, "open");
	46	return 1;
	47	}
	48
	49	if (ftruncate(f->fd, f->file_size) == -1) {
	50	td_verror(td, errno, "ftruncate");
	51	goto err;
	52	}
	53
	54	if (posix_fallocate(f->fd, 0, f->file_size) < 0) {
	55	td_verror(td, errno, "posix_fallocate");
	56	goto err;
	57	}
	58
	59	b = malloc(td->max_bs[DDIR_WRITE]);
	60	memset(b, 0, td->max_bs[DDIR_WRITE]);
	61
	62	left = f->file_size;
	63	while (left && !td->terminate) {
	64	bs = td->max_bs[DDIR_WRITE];
	65	if (bs > left)
	66	bs = left;
	67
	68	r = write(f->fd, b, bs);
	69
	70	if (r == (int) bs) {
	71	left -= bs;
	72	continue;
	73	} else {
	74	if (r < 0)
	75	td_verror(td, errno, "write");
	76	else
	77	td_verror(td, EIO, "write");
	78
	79	break;
	80	}
	81	}
	82
	83	if (td->terminate)
	84	unlink(f->file_name);
	85	else if (td->create_fsync)
	86	fsync(f->fd);
	87
	88	free(b);
	89	close(f->fd);
	90	f->fd = -1;
	91	return 0;
	92	err:
	93	close(f->fd);
	94	f->fd = -1;
	95	return 1;
	96	}
	97
	98	static int create_files(struct thread_data *td)
	99	{
	100	struct fio_file *f;
	101	int i, err, need_create;
	102
	103	for_each_file(td, f, i)
	104	f->file_size = td->total_file_size / td->nr_files;
	105
	106	/*
	107	* unless specifically asked for overwrite, let normal io extend it
	108	*/
	109	if (!td->overwrite)
	110	return 0;
	111
	112	need_create = 0;
	113	if (td->filetype == FIO_TYPE_FILE) {
	114	for_each_file(td, f, i) {
	115	int file_there = !file_ok(td, f);
	116
	117	if (file_there && td_write(td) && !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, "file_size");
	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	if (td->overwrite) {
	164	if (fstat(f->fd, &st) == -1) {
	165	td_verror(td, errno, "fstat");
	166	return 1;
	167	}
	168
	169	f->real_file_size = st.st_size;
	170
	171	if (!f->file_size \|\| f->file_size > f->real_file_size)
	172	f->file_size = f->real_file_size;
	173	} else
	174	f->real_file_size = f->file_size;
	175
	176	return 0;
	177	}
	178
	179	static int bdev_size(struct thread_data td, struct fio_file f)
	180	{
	181	unsigned long long bytes;
	182	int r;
	183
	184	r = blockdev_size(f->fd, &bytes);
	185	if (r) {
	186	td_verror(td, r, "blockdev_size");
	187	return 1;
	188	}
	189
	190	f->real_file_size = bytes;
	191
	192	/*
	193	* no extend possibilities, so limit size to device size if too large
	194	*/
	195	if (!f->file_size \|\| f->file_size > f->real_file_size)
	196	f->file_size = f->real_file_size;
	197
	198	f->file_size -= f->file_offset;
	199	return 0;
	200	}
	201
	202	static int get_file_size(struct thread_data td, struct fio_file f)
	203	{
	204	int ret = 0;
	205
	206	if (td->filetype == FIO_TYPE_FILE)
	207	ret = file_size(td, f);
	208	else if (td->filetype == FIO_TYPE_BD)
	209	ret = bdev_size(td, f);
	210	else
	211	f->real_file_size = -1;
	212
	213	if (ret)
	214	return ret;
	215
	216	if (f->file_offset > f->real_file_size) {
	217	log_err("%s: offset extends end (%Lu > %Lu)\n", td->name, f->file_offset, f->real_file_size);
	218	return 1;
	219	}
	220
	221	return 0;
	222	}
	223
	224	int file_invalidate_cache(struct thread_data td, struct fio_file f)
	225	{
	226	int ret = 0;
	227
	228	if (!td->invalidate_cache)
	229	return 0;
	230	if (td->odirect)
	231	return 0;
	232
	233	/*
	234	* FIXME: add blockdev flushing too
	235	*/
	236	if (f->mmap)
	237	ret = madvise(f->mmap, f->file_size, MADV_DONTNEED);
	238	else if (td->filetype == FIO_TYPE_FILE) {
	239	ret = fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED);
	240	} else if (td->filetype == FIO_TYPE_BD) {
	241	ret = blockdev_invalidate_cache(f->fd);
	242	} else if (td->filetype == FIO_TYPE_CHAR)
	243	ret = 0;
	244
	245	if (ret < 0) {
	246	td_verror(td, errno, "invalidate_cache");
	247	return 1;
	248	}
	249
	250	return ret;
	251	}
	252
	253	void generic_close_file(struct thread_data fio_unused td, struct fio_file f)
	254	{
	255	close(f->fd);
	256	f->fd = -1;
	257	}
	258
	259	int generic_open_file(struct thread_data td, struct fio_file f)
	260	{
	261	int flags = 0;
	262
	263	if (td->odirect)
	264	flags \|= OS_O_DIRECT;
	265	if (td->sync_io)
	266	flags \|= O_SYNC;
	267
	268	if (td_write(td) \|\| td_rw(td)) {
	269	flags \|= O_RDWR;
	270
	271	if (td->filetype == FIO_TYPE_FILE) {
	272	if (!td->overwrite)
	273	flags \|= O_TRUNC;
	274
	275	flags \|= O_CREAT;
	276	}
	277
	278	f->fd = open(f->file_name, flags, 0600);
	279	} else {
	280	if (td->filetype == FIO_TYPE_CHAR)
	281	flags \|= O_RDWR;
	282	else
	283	flags \|= O_RDONLY;
	284
	285	f->fd = open(f->file_name, flags);
	286	}
	287
	288	if (f->fd == -1) {
	289	int __e = errno;
	290
	291	td_verror(td, __e, "open");
	292	if (__e == EINVAL && td->odirect)
	293	log_err("fio: destination does not support O_DIRECT\n");
	294	return 1;
	295	}
	296
	297	if (get_file_size(td, f))
	298	goto err;
	299
	300	if (file_invalidate_cache(td, f))
	301	goto err;
	302
	303	if (!td_random(td)) {
	304	if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) {
	305	td_verror(td, errno, "fadvise");
	306	goto err;
	307	}
	308	} else {
	309	if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) {
	310	td_verror(td, errno, "fadvise");
	311	goto err;
	312	}
	313	}
	314
	315	return 0;
	316	err:
	317	close(f->fd);
	318	return 1;
	319	}
	320
	321	int open_files(struct thread_data *td)
	322	{
	323	struct fio_file *f;
	324	int i, err = 0;
	325
	326	for_each_file(td, f, i) {
	327	err = td_io_open_file(td, f);
	328	if (err)
	329	break;
	330
	331	if (td->open_files == td->nr_open_files)
	332	break;
	333	}
	334
	335	if (!err)
	336	return 0;
	337
	338	for_each_file(td, f, i)
	339	td_io_close_file(td, f);
	340
	341	return err;
	342	}
	343
	344	int setup_files(struct thread_data *td)
	345	{
	346	struct fio_file *f;
	347	int err, i;
	348
	349	/*
	350	* if ioengine defines a setup() method, it's responsible for
	351	* setting up everything in the td->files[] area.
	352	*/
	353	if (td->io_ops->setup)
	354	return td->io_ops->setup(td);
	355
	356	if (create_files(td))
	357	return 1;
	358
	359	err = open_files(td);
	360	if (err)
	361	return err;
	362
	363	/*
	364	* Recalculate the total file size now that files are set up.
	365	*/
	366	td->total_file_size = 0;
	367	for_each_file(td, f, i)
	368	td->total_file_size += f->file_size;
	369
	370	td->total_file_size = (td->total_file_size * td->nr_files) / td->open_files;
	371
	372	td->io_size = td->total_file_size;
	373	if (td->io_size == 0) {
	374	log_err("%s: no io blocks\n", td->name);
	375	td_verror(td, EINVAL, "total_file_size");
	376	return 1;
	377	}
	378
	379	if (!td->zone_size)
	380	td->zone_size = td->io_size;
	381
	382	td->total_io_size = td->io_size * td->loops;
	383
	384	for_each_file(td, f, i)
	385	td_io_close_file(td, f);
	386
	387	return err;
	388	}
	389
	390	void close_files(struct thread_data *td)
	391	{
	392	struct fio_file *f;
	393	int i;
	394
	395	for_each_file(td, f, i) {
	396	if (!td->filename && f->unlink &&
	397	td->filetype == FIO_TYPE_FILE) {
	398	unlink(f->file_name);
	399	free(f->file_name);
	400	f->file_name = NULL;
	401	}
	402
	403	td_io_close_file(td, f);
	404	}
	405
	406	td->filename = NULL;
	407	free(td->files);
	408	td->files = NULL;
	409	td->nr_files = 0;
	410	}