[fio.git] / engines / sync.c

/*
 * sync/psync engine
 *
 * IO engine that does regular read(2)/write(2) with lseek(2) to transfer
 * data and IO engine that does regular pread(2)/pwrite(2) to transfer data.
 *
 */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/uio.h>
#include <errno.h>
#include <assert.h>

#include "../fio.h"

struct syncio_data {
	struct iovec *iovecs;
	struct io_u **io_us;
	unsigned int queued;
	unsigned int events;
	unsigned long queued_bytes;

	unsigned long long last_offset;
	struct fio_file *last_file;
	enum fio_ddir last_ddir;
};

static int fio_syncio_prep(struct thread_data *td, struct io_u *io_u)
{
	struct fio_file *f = io_u->file;

	if (ddir_sync(io_u->ddir))
		return 0;

	if (f->file_pos != -1ULL && f->file_pos == io_u->offset)
		return 0;

	if (lseek(f->fd, io_u->offset, SEEK_SET) == -1) {
		td_verror(td, errno, "lseek");
		return 1;
	}

	return 0;
}

static int fio_io_end(struct thread_data *td, struct io_u *io_u, int ret)
{
	if (io_u->file && ret >= 0)
		io_u->file->file_pos = io_u->offset + ret;

	if (ret != (int) io_u->xfer_buflen) {
		if (ret >= 0) {
			io_u->resid = io_u->xfer_buflen - ret;
			io_u->error = 0;
			return FIO_Q_COMPLETED;
		} else
			io_u->error = errno;
	}

	if (io_u->error)
		td_verror(td, io_u->error, "xfer");

	return FIO_Q_COMPLETED;
}

static int fio_psyncio_queue(struct thread_data *td, struct io_u *io_u)
{
	struct fio_file *f = io_u->file;
	int ret;

	fio_ro_check(td, io_u);

	if (io_u->ddir == DDIR_READ)
		ret = pread(f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset);
	else if (io_u->ddir == DDIR_WRITE)
		ret = pwrite(f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset);
	else
		ret = fsync(f->fd);

	return fio_io_end(td, io_u, ret);
}

static int fio_syncio_queue(struct thread_data *td, struct io_u *io_u)
{
	struct fio_file *f = io_u->file;
	int ret;

	fio_ro_check(td, io_u);

	if (io_u->ddir == DDIR_READ)
		ret = read(f->fd, io_u->xfer_buf, io_u->xfer_buflen);
	else if (io_u->ddir == DDIR_WRITE)
		ret = write(f->fd, io_u->xfer_buf, io_u->xfer_buflen);
	else
		ret = fsync(f->fd);

	return fio_io_end(td, io_u, ret);
}

static int fio_vsyncio_getevents(struct thread_data *td, unsigned int min,
				 unsigned int max,
				 struct timespec fio_unused *t)
{
	struct syncio_data *sd = td->io_ops->data;
	int ret;

	if (min) {
		ret = sd->events;
		sd->events = 0;
	} else
		ret = 0;

	dprint(FD_IO, "vsyncio_getevents: min=%d,max=%d: %d\n", min, max, ret);
	return ret;
}

static struct io_u *fio_vsyncio_event(struct thread_data *td, int event)
{
	struct syncio_data *sd = td->io_ops->data;

	return sd->io_us[event];
}

static int fio_vsyncio_append(struct thread_data *td, struct io_u *io_u)
{
	struct syncio_data *sd = td->io_ops->data;

	if (ddir_sync(io_u->ddir))
		return 0;

	if (io_u->offset == sd->last_offset && io_u->file == sd->last_file &&
	    io_u->ddir == sd->last_ddir)
		return 1;

	return 0;
}

static void fio_vsyncio_set_iov(struct syncio_data *sd, struct io_u *io_u,
				int index)
{
	sd->io_us[index] = io_u;
	sd->iovecs[index].iov_base = io_u->xfer_buf;
	sd->iovecs[index].iov_len = io_u->xfer_buflen;
	sd->last_offset = io_u->offset + io_u->xfer_buflen;
	sd->last_file = io_u->file;
	sd->last_ddir = io_u->ddir;
	sd->queued_bytes += io_u->xfer_buflen;
	sd->queued++;
}

static int fio_vsyncio_queue(struct thread_data *td, struct io_u *io_u)
{
	struct syncio_data *sd = td->io_ops->data;

	fio_ro_check(td, io_u);

	if (!fio_vsyncio_append(td, io_u)) {
		dprint(FD_IO, "vsyncio_queue: no append (%d)\n", sd->queued);
		/*
		 * If we can't append and have stuff queued, tell fio to
		 * commit those first and then retry this io
		 */
		if (sd->queued)
			return FIO_Q_BUSY;
		if (io_u->ddir == DDIR_SYNC) {
			int ret = fsync(io_u->file->fd);

			return fio_io_end(td, io_u, ret);
		} else if (io_u->ddir == DDIR_DATASYNC) {
			int ret;
#ifdef FIO_HAVE_FDATASYNC
			ret = fdatasync(io_u->file->fd);
#else
			ret = io_u->xfer_buflen;
			io_u->error = EINVAL;
#endif
			return fio_io_end(td, io_u, ret);
			
		}
	
		sd->queued = 0;
		sd->queued_bytes = 0;
		fio_vsyncio_set_iov(sd, io_u, 0);
	} else {
		if (sd->queued == td->o.iodepth) {
			dprint(FD_IO, "vsyncio_queue: max depth %d\n", sd->queued);
			return FIO_Q_BUSY;
		}

		dprint(FD_IO, "vsyncio_queue: append\n");
		fio_vsyncio_set_iov(sd, io_u, sd->queued);
	}

	dprint(FD_IO, "vsyncio_queue: depth now %d\n", sd->queued);
	return FIO_Q_QUEUED;
}

/*
 * Check that we transferred all bytes, or saw an error, etc
 */
static int fio_vsyncio_end(struct thread_data *td, ssize_t bytes)
{
	struct syncio_data *sd = td->io_ops->data;
	struct io_u *io_u;
	unsigned int i;
	int err;

	/*
	 * transferred everything, perfect
	 */
	if (bytes == sd->queued_bytes)
		return 0;

	err = errno;
	for (i = 0; i < sd->queued; i++) {
		io_u = sd->io_us[i];

		if (bytes == -1) {
			io_u->error = err;
		} else {
			unsigned int this_io;

			this_io = bytes;
			if (this_io > io_u->xfer_buflen)
				this_io = io_u->xfer_buflen;

			io_u->resid = io_u->xfer_buflen - this_io;
			io_u->error = 0;
			bytes -= this_io;
		}
	}

	if (bytes == -1) {
		td_verror(td, err, "xfer vsync");
		return -err;
	}

	return 0;
}

static int fio_vsyncio_commit(struct thread_data *td)
{
	struct syncio_data *sd = td->io_ops->data;
	struct fio_file *f;
	ssize_t ret;

	if (!sd->queued)
		return 0;

	io_u_mark_submit(td, sd->queued);
	f = sd->last_file;

	if (lseek(f->fd, sd->io_us[0]->offset, SEEK_SET) == -1) {
		int err = -errno;

		td_verror(td, errno, "lseek");
		return err;
	}

	if (sd->last_ddir == DDIR_READ)
		ret = readv(f->fd, sd->iovecs, sd->queued);
	else
		ret = writev(f->fd, sd->iovecs, sd->queued);

	dprint(FD_IO, "vsyncio_commit: %d\n", (int) ret);
	sd->events = sd->queued;
	sd->queued = 0;
	return fio_vsyncio_end(td, ret);
}

static int fio_vsyncio_init(struct thread_data *td)
{
	struct syncio_data *sd;

	sd = malloc(sizeof(*sd));
	memset(sd, 0, sizeof(*sd));
	sd->last_offset = -1ULL;
	sd->iovecs = malloc(td->o.iodepth * sizeof(struct iovec));
	sd->io_us = malloc(td->o.iodepth * sizeof(struct io_u *));

	td->io_ops->data = sd;
	return 0;
}

static void fio_vsyncio_cleanup(struct thread_data *td)
{
	struct syncio_data *sd = td->io_ops->data;

	free(sd->iovecs);
	free(sd->io_us);
	free(sd);
}

static struct ioengine_ops ioengine_rw = {
	.name		= "sync",
	.version	= FIO_IOOPS_VERSION,
	.prep		= fio_syncio_prep,
	.queue		= fio_syncio_queue,
	.open_file	= generic_open_file,
	.close_file	= generic_close_file,
	.get_file_size	= generic_get_file_size,
	.flags		= FIO_SYNCIO,
};

static struct ioengine_ops ioengine_prw = {
	.name		= "psync",
	.version	= FIO_IOOPS_VERSION,
	.queue		= fio_psyncio_queue,
	.open_file	= generic_open_file,
	.close_file	= generic_close_file,
	.get_file_size	= generic_get_file_size,
	.flags		= FIO_SYNCIO,
};

static struct ioengine_ops ioengine_vrw = {
	.name		= "vsync",
	.version	= FIO_IOOPS_VERSION,
	.init		= fio_vsyncio_init,
	.cleanup	= fio_vsyncio_cleanup,
	.queue		= fio_vsyncio_queue,
	.commit		= fio_vsyncio_commit,
	.event		= fio_vsyncio_event,
	.getevents	= fio_vsyncio_getevents,
	.open_file	= generic_open_file,
	.close_file	= generic_close_file,
	.get_file_size	= generic_get_file_size,
	.flags		= FIO_SYNCIO,
};

static void fio_init fio_syncio_register(void)
{
	register_ioengine(&ioengine_rw);
	register_ioengine(&ioengine_prw);
	register_ioengine(&ioengine_vrw);
}

static void fio_exit fio_syncio_unregister(void)
{
	unregister_ioengine(&ioengine_rw);
	unregister_ioengine(&ioengine_prw);
	unregister_ioengine(&ioengine_vrw);
}
Commit	Line	Data
2866c82d	1	/*
a31041ea	2	* sync/psync engine
da751ca9 JA	3	*
da751ca9 JA	4	* IO engine that does regular read(2)/write(2) with lseek(2) to transfer
a31041ea	5	* data and IO engine that does regular pread(2)/pwrite(2) to transfer data.
2866c82d JA	6	*
	7	*/
	8	#include <stdio.h>
	9	#include <stdlib.h>
	10	#include <unistd.h>
5921e80c	11	#include <sys/uio.h>
2866c82d JA	12	#include <errno.h>
2866c82d JA	13	#include <assert.h>
5f350952 JA	14
5f350952 JA	15	#include "../fio.h"
2866c82d	16
1d2af02a JA	17	struct syncio_data {
	18	struct iovec *iovecs;
	19	struct io_u **io_us;
	20	unsigned int queued;
e51cf72c	21	unsigned int events;
1d2af02a JA	22	unsigned long queued_bytes;
	23
	24	unsigned long long last_offset;
	25	struct fio_file *last_file;
	26	enum fio_ddir last_ddir;
	27	};
	28
2866c82d JA	29	static int fio_syncio_prep(struct thread_data td, struct io_u io_u)
2866c82d JA	30	{
53cdc686 JA	31	struct fio_file *f = io_u->file;
53cdc686 JA	32
5f9099ea	33	if (ddir_sync(io_u->ddir))
87dc1ab1 JA	34	return 0;
87dc1ab1 JA	35
e943b878 JA	36	if (f->file_pos != -1ULL && f->file_pos == io_u->offset)
	37	return 0;
	38
53cdc686	39	if (lseek(f->fd, io_u->offset, SEEK_SET) == -1) {
e1161c32	40	td_verror(td, errno, "lseek");
2866c82d JA	41	return 1;
	42	}
	43
	44	return 0;
	45	}
	46
2bd3eabc	47	static int fio_io_end(struct thread_data td, struct io_u io_u, int ret)
2866c82d	48	{
e943b878 JA	49	if (io_u->file && ret >= 0)
	50	io_u->file->file_pos = io_u->offset + ret;
	51
cec6b55d	52	if (ret != (int) io_u->xfer_buflen) {
22819ec2	53	if (ret >= 0) {
cec6b55d JA	54	io_u->resid = io_u->xfer_buflen - ret;
cec6b55d JA	55	io_u->error = 0;
36167d82	56	return FIO_Q_COMPLETED;
2866c82d JA	57	} else
	58	io_u->error = errno;
	59	}
	60
36167d82	61	if (io_u->error)
e1161c32	62	td_verror(td, io_u->error, "xfer");
2866c82d	63
36167d82	64	return FIO_Q_COMPLETED;
2866c82d JA	65	}
2866c82d JA	66
2bd3eabc	67	static int fio_psyncio_queue(struct thread_data td, struct io_u io_u)
a31041ea	68	{
2bd3eabc JA	69	struct fio_file *f = io_u->file;
	70	int ret;
	71
	72	fio_ro_check(td, io_u);
	73
	74	if (io_u->ddir == DDIR_READ)
	75	ret = pread(f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset);
	76	else if (io_u->ddir == DDIR_WRITE)
	77	ret = pwrite(f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset);
	78	else
	79	ret = fsync(f->fd);
	80
	81	return fio_io_end(td, io_u, ret);
	82	}
	83
	84	static int fio_syncio_queue(struct thread_data td, struct io_u io_u)
	85	{
	86	struct fio_file *f = io_u->file;
	87	int ret;
	88
	89	fio_ro_check(td, io_u);
	90
	91	if (io_u->ddir == DDIR_READ)
	92	ret = read(f->fd, io_u->xfer_buf, io_u->xfer_buflen);
	93	else if (io_u->ddir == DDIR_WRITE)
	94	ret = write(f->fd, io_u->xfer_buf, io_u->xfer_buflen);
	95	else
	96	ret = fsync(f->fd);
	97
	98	return fio_io_end(td, io_u, ret);
a31041ea	99	}
a31041ea	100
1d2af02a JA	101	static int fio_vsyncio_getevents(struct thread_data *td, unsigned int min,
	102	unsigned int max,
	103	struct timespec fio_unused *t)
	104	{
	105	struct syncio_data *sd = td->io_ops->data;
	106	int ret;
	107
	108	if (min) {
e51cf72c JA	109	ret = sd->events;
e51cf72c JA	110	sd->events = 0;
1d2af02a JA	111	} else
	112	ret = 0;
	113
	114	dprint(FD_IO, "vsyncio_getevents: min=%d,max=%d: %d\n", min, max, ret);
	115	return ret;
	116	}
	117
	118	static struct io_u fio_vsyncio_event(struct thread_data td, int event)
	119	{
	120	struct syncio_data *sd = td->io_ops->data;
	121
	122	return sd->io_us[event];
	123	}
	124
	125	static int fio_vsyncio_append(struct thread_data td, struct io_u io_u)
	126	{
	127	struct syncio_data *sd = td->io_ops->data;
	128
5f9099ea	129	if (ddir_sync(io_u->ddir))
1d2af02a JA	130	return 0;
	131
	132	if (io_u->offset == sd->last_offset && io_u->file == sd->last_file &&
	133	io_u->ddir == sd->last_ddir)
	134	return 1;
	135
	136	return 0;
	137	}
	138
	139	static void fio_vsyncio_set_iov(struct syncio_data sd, struct io_u io_u,
	140	int index)
	141	{
	142	sd->io_us[index] = io_u;
	143	sd->iovecs[index].iov_base = io_u->xfer_buf;
	144	sd->iovecs[index].iov_len = io_u->xfer_buflen;
	145	sd->last_offset = io_u->offset + io_u->xfer_buflen;
	146	sd->last_file = io_u->file;
	147	sd->last_ddir = io_u->ddir;
	148	sd->queued_bytes += io_u->xfer_buflen;
	149	sd->queued++;
	150	}
	151
	152	static int fio_vsyncio_queue(struct thread_data td, struct io_u io_u)
	153	{
	154	struct syncio_data *sd = td->io_ops->data;
	155
	156	fio_ro_check(td, io_u);
	157
	158	if (!fio_vsyncio_append(td, io_u)) {
	159	dprint(FD_IO, "vsyncio_queue: no append (%d)\n", sd->queued);
	160	/*
	161	* If we can't append and have stuff queued, tell fio to
	162	* commit those first and then retry this io
	163	*/
	164	if (sd->queued)
	165	return FIO_Q_BUSY;
cc9159c3 JA	166	if (io_u->ddir == DDIR_SYNC) {
	167	int ret = fsync(io_u->file->fd);
	168
	169	return fio_io_end(td, io_u, ret);
5f9099ea	170	} else if (io_u->ddir == DDIR_DATASYNC) {
c36d16f5 JA	171	int ret;
	172	#ifdef FIO_HAVE_FDATASYNC
	173	ret = fdatasync(io_u->file->fd);
	174	#else
	175	ret = io_u->xfer_buflen;
	176	io_u->error = EINVAL;
	177	#endif
5f9099ea	178	return fio_io_end(td, io_u, ret);
c36d16f5	179
5f9099ea JA	180	}
5f9099ea JA	181
1d2af02a JA	182	sd->queued = 0;
	183	sd->queued_bytes = 0;
	184	fio_vsyncio_set_iov(sd, io_u, 0);
	185	} else {
	186	if (sd->queued == td->o.iodepth) {
	187	dprint(FD_IO, "vsyncio_queue: max depth %d\n", sd->queued);
	188	return FIO_Q_BUSY;
	189	}
	190
	191	dprint(FD_IO, "vsyncio_queue: append\n");
	192	fio_vsyncio_set_iov(sd, io_u, sd->queued);
	193	}
	194
	195	dprint(FD_IO, "vsyncio_queue: depth now %d\n", sd->queued);
	196	return FIO_Q_QUEUED;
	197	}
	198
	199	/*
	200	* Check that we transferred all bytes, or saw an error, etc
	201	*/
	202	static int fio_vsyncio_end(struct thread_data *td, ssize_t bytes)
	203	{
	204	struct syncio_data *sd = td->io_ops->data;
	205	struct io_u *io_u;
	206	unsigned int i;
	207	int err;
	208
	209	/*
	210	* transferred everything, perfect
	211	*/
	212	if (bytes == sd->queued_bytes)
	213	return 0;
	214
	215	err = errno;
	216	for (i = 0; i < sd->queued; i++) {
	217	io_u = sd->io_us[i];
	218
	219	if (bytes == -1) {
	220	io_u->error = err;
	221	} else {
	222	unsigned int this_io;
	223
	224	this_io = bytes;
	225	if (this_io > io_u->xfer_buflen)
	226	this_io = io_u->xfer_buflen;
	227
	228	io_u->resid = io_u->xfer_buflen - this_io;
	229	io_u->error = 0;
	230	bytes -= this_io;
	231	}
	232	}
	233
	234	if (bytes == -1) {
	235	td_verror(td, err, "xfer vsync");
	236	return -err;
	237	}
	238
	239	return 0;
	240	}
	241
	242	static int fio_vsyncio_commit(struct thread_data *td)
	243	{
	244	struct syncio_data *sd = td->io_ops->data;
	245	struct fio_file *f;
246	ssize_t ret;
247
248	if (!sd->queued)
249	return 0;
250
838bc709	251	io_u_mark_submit(td, sd->queued);
1d2af02a JA	252	f = sd->last_file;
	253
	254	if (lseek(f->fd, sd->io_us[0]->offset, SEEK_SET) == -1) {
	255	int err = -errno;
	256
	257	td_verror(td, errno, "lseek");
	258	return err;
	259	}
	260
	261	if (sd->last_ddir == DDIR_READ)
	262	ret = readv(f->fd, sd->iovecs, sd->queued);
	263	else
	264	ret = writev(f->fd, sd->iovecs, sd->queued);
	265
	266	dprint(FD_IO, "vsyncio_commit: %d\n", (int) ret);
e51cf72c JA	267	sd->events = sd->queued;
e51cf72c JA	268	sd->queued = 0;
1d2af02a JA	269	return fio_vsyncio_end(td, ret);
	270	}
	271
	272	static int fio_vsyncio_init(struct thread_data *td)
	273	{
	274	struct syncio_data *sd;
	275
	276	sd = malloc(sizeof(*sd));
	277	memset(sd, 0, sizeof(*sd));
	278	sd->last_offset = -1ULL;
	279	sd->iovecs = malloc(td->o.iodepth * sizeof(struct iovec));
	280	sd->io_us = malloc(td->o.iodepth * sizeof(struct io_u *));
	281
	282	td->io_ops->data = sd;
	283	return 0;
	284	}
	285
	286	static void fio_vsyncio_cleanup(struct thread_data *td)
	287	{
	288	struct syncio_data *sd = td->io_ops->data;
	289
	290	free(sd->iovecs);
	291	free(sd->io_us);
	292	free(sd);
1d2af02a JA	293	}
1d2af02a JA	294
a31041ea	295	static struct ioengine_ops ioengine_rw = {
2866c82d JA	296	.name = "sync",
2866c82d JA	297	.version = FIO_IOOPS_VERSION,
2866c82d JA	298	.prep = fio_syncio_prep,
2866c82d JA	299	.queue = fio_syncio_queue,
b5af8293 JA	300	.open_file = generic_open_file,
b5af8293 JA	301	.close_file = generic_close_file,
df9c26b1	302	.get_file_size = generic_get_file_size,
2866c82d JA	303	.flags = FIO_SYNCIO,
2866c82d JA	304	};
5f350952	305
a31041ea	306	static struct ioengine_ops ioengine_prw = {
	307	.name = "psync",
	308	.version = FIO_IOOPS_VERSION,
2bd3eabc	309	.queue = fio_psyncio_queue,
a31041ea	310	.open_file = generic_open_file,
a31041ea	311	.close_file = generic_close_file,
df9c26b1	312	.get_file_size = generic_get_file_size,
a31041ea	313	.flags = FIO_SYNCIO,
	314	};
	315
1d2af02a JA	316	static struct ioengine_ops ioengine_vrw = {
	317	.name = "vsync",
	318	.version = FIO_IOOPS_VERSION,
	319	.init = fio_vsyncio_init,
	320	.cleanup = fio_vsyncio_cleanup,
	321	.queue = fio_vsyncio_queue,
	322	.commit = fio_vsyncio_commit,
	323	.event = fio_vsyncio_event,
	324	.getevents = fio_vsyncio_getevents,
	325	.open_file = generic_open_file,
	326	.close_file = generic_close_file,
df9c26b1	327	.get_file_size = generic_get_file_size,
1d2af02a JA	328	.flags = FIO_SYNCIO,
	329	};
	330
5f350952 JA	331	static void fio_init fio_syncio_register(void)
5f350952 JA	332	{
a31041ea	333	register_ioengine(&ioengine_rw);
a31041ea	334	register_ioengine(&ioengine_prw);
1d2af02a	335	register_ioengine(&ioengine_vrw);
5f350952 JA	336	}
	337
	338	static void fio_exit fio_syncio_unregister(void)
	339	{
a31041ea	340	unregister_ioengine(&ioengine_rw);
a31041ea	341	unregister_ioengine(&ioengine_prw);
1d2af02a	342	unregister_ioengine(&ioengine_vrw);
5f350952	343	}