[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 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 (io_u->ddir == DDIR_SYNC)
		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 (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->queued;
		sd->queued = 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 (io_u->ddir == DDIR_SYNC)
		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);
		}

		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);
	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);
	td->io_ops->data = NULL;
}

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