[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_rw(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 && ddir_rw(io_u->ddir))
		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 if (io_u->ddir == DDIR_TRIM) {
		do_io_u_trim(td, io_u);
		return FIO_Q_COMPLETED;
	} else
		ret = do_io_u_sync(td, io_u);

	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 if (io_u->ddir == DDIR_TRIM) {
		do_io_u_trim(td, io_u);
		return FIO_Q_COMPLETED;
	} else
		ret = do_io_u_sync(td, io_u);

	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 idx)
{
	sd->io_us[idx] = io_u;
	sd->iovecs[idx].iov_base = io_u->xfer_buf;
	sd->iovecs[idx].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 (ddir_sync(io_u->ddir)) {
			int ret = do_io_u_sync(td, io_u);

			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
ff58fced	33	if (!ddir_rw(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	{
ff58fced	49	if (io_u->file && ret >= 0 && ddir_rw(io_u->ddir))
e943b878 JA	50	io_u->file->file_pos = io_u->offset + ret;
e943b878 JA	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);
6eaf09d6 SL	78	else if (io_u->ddir == DDIR_TRIM) {
	79	do_io_u_trim(td, io_u);
	80	return FIO_Q_COMPLETED;
	81	} else
0a28ecda	82	ret = do_io_u_sync(td, io_u);
2bd3eabc JA	83
	84	return fio_io_end(td, io_u, ret);
	85	}
	86
	87	static int fio_syncio_queue(struct thread_data td, struct io_u io_u)
	88	{
	89	struct fio_file *f = io_u->file;
	90	int ret;
	91
	92	fio_ro_check(td, io_u);
	93
	94	if (io_u->ddir == DDIR_READ)
	95	ret = read(f->fd, io_u->xfer_buf, io_u->xfer_buflen);
	96	else if (io_u->ddir == DDIR_WRITE)
	97	ret = write(f->fd, io_u->xfer_buf, io_u->xfer_buflen);
6eaf09d6 SL	98	else if (io_u->ddir == DDIR_TRIM) {
	99	do_io_u_trim(td, io_u);
	100	return FIO_Q_COMPLETED;
	101	} else
0a28ecda	102	ret = do_io_u_sync(td, io_u);
2bd3eabc JA	103
2bd3eabc JA	104	return fio_io_end(td, io_u, ret);
a31041ea	105	}
a31041ea	106
1d2af02a JA	107	static int fio_vsyncio_getevents(struct thread_data *td, unsigned int min,
	108	unsigned int max,
	109	struct timespec fio_unused *t)
	110	{
	111	struct syncio_data *sd = td->io_ops->data;
	112	int ret;
	113
	114	if (min) {
e51cf72c JA	115	ret = sd->events;
e51cf72c JA	116	sd->events = 0;
1d2af02a JA	117	} else
	118	ret = 0;
	119
	120	dprint(FD_IO, "vsyncio_getevents: min=%d,max=%d: %d\n", min, max, ret);
	121	return ret;
	122	}
	123
	124	static struct io_u fio_vsyncio_event(struct thread_data td, int event)
	125	{
	126	struct syncio_data *sd = td->io_ops->data;
	127
	128	return sd->io_us[event];
	129	}
	130
	131	static int fio_vsyncio_append(struct thread_data td, struct io_u io_u)
	132	{
	133	struct syncio_data *sd = td->io_ops->data;
	134
5f9099ea	135	if (ddir_sync(io_u->ddir))
1d2af02a JA	136	return 0;
	137
	138	if (io_u->offset == sd->last_offset && io_u->file == sd->last_file &&
	139	io_u->ddir == sd->last_ddir)
	140	return 1;
	141
	142	return 0;
	143	}
	144
	145	static void fio_vsyncio_set_iov(struct syncio_data sd, struct io_u io_u,
2b13e716	146	int idx)
1d2af02a	147	{
2b13e716 JA	148	sd->io_us[idx] = io_u;
	149	sd->iovecs[idx].iov_base = io_u->xfer_buf;
	150	sd->iovecs[idx].iov_len = io_u->xfer_buflen;
1d2af02a JA	151	sd->last_offset = io_u->offset + io_u->xfer_buflen;
	152	sd->last_file = io_u->file;
	153	sd->last_ddir = io_u->ddir;
	154	sd->queued_bytes += io_u->xfer_buflen;
	155	sd->queued++;
	156	}
	157
	158	static int fio_vsyncio_queue(struct thread_data td, struct io_u io_u)
	159	{
	160	struct syncio_data *sd = td->io_ops->data;
	161
	162	fio_ro_check(td, io_u);
	163
	164	if (!fio_vsyncio_append(td, io_u)) {
	165	dprint(FD_IO, "vsyncio_queue: no append (%d)\n", sd->queued);
	166	/*
	167	* If we can't append and have stuff queued, tell fio to
	168	* commit those first and then retry this io
	169	*/
	170	if (sd->queued)
	171	return FIO_Q_BUSY;
0a28ecda JA	172	if (ddir_sync(io_u->ddir)) {
	173	int ret = do_io_u_sync(td, io_u);
	174
	175	return fio_io_end(td, io_u, ret);
	176	}
cc9159c3	177
1d2af02a JA	178	sd->queued = 0;
	179	sd->queued_bytes = 0;
	180	fio_vsyncio_set_iov(sd, io_u, 0);
	181	} else {
	182	if (sd->queued == td->o.iodepth) {
	183	dprint(FD_IO, "vsyncio_queue: max depth %d\n", sd->queued);
	184	return FIO_Q_BUSY;
	185	}
	186
	187	dprint(FD_IO, "vsyncio_queue: append\n");
	188	fio_vsyncio_set_iov(sd, io_u, sd->queued);
	189	}
	190
	191	dprint(FD_IO, "vsyncio_queue: depth now %d\n", sd->queued);
	192	return FIO_Q_QUEUED;
	193	}
	194
	195	/*
	196	* Check that we transferred all bytes, or saw an error, etc
	197	*/
	198	static int fio_vsyncio_end(struct thread_data *td, ssize_t bytes)
	199	{
	200	struct syncio_data *sd = td->io_ops->data;
	201	struct io_u *io_u;
	202	unsigned int i;
	203	int err;
	204
	205	/*
	206	* transferred everything, perfect
	207	*/
	208	if (bytes == sd->queued_bytes)
	209	return 0;
	210
	211	err = errno;
	212	for (i = 0; i < sd->queued; i++) {
	213	io_u = sd->io_us[i];
	214
	215	if (bytes == -1) {
	216	io_u->error = err;
	217	} else {
	218	unsigned int this_io;
	219
	220	this_io = bytes;
	221	if (this_io > io_u->xfer_buflen)
	222	this_io = io_u->xfer_buflen;
	223
	224	io_u->resid = io_u->xfer_buflen - this_io;
	225	io_u->error = 0;
	226	bytes -= this_io;
	227	}
	228	}
	229
	230	if (bytes == -1) {
	231	td_verror(td, err, "xfer vsync");
	232	return -err;
	233	}
	234
	235	return 0;
	236	}
	237
	238	static int fio_vsyncio_commit(struct thread_data *td)
	239	{
	240	struct syncio_data *sd = td->io_ops->data;
	241	struct fio_file *f;
242	ssize_t ret;
243
244	if (!sd->queued)
245	return 0;
246
838bc709	247	io_u_mark_submit(td, sd->queued);
1d2af02a JA	248	f = sd->last_file;
	249
	250	if (lseek(f->fd, sd->io_us[0]->offset, SEEK_SET) == -1) {
	251	int err = -errno;
	252
	253	td_verror(td, errno, "lseek");
	254	return err;
	255	}
	256
	257	if (sd->last_ddir == DDIR_READ)
	258	ret = readv(f->fd, sd->iovecs, sd->queued);
	259	else
	260	ret = writev(f->fd, sd->iovecs, sd->queued);
	261
	262	dprint(FD_IO, "vsyncio_commit: %d\n", (int) ret);
e51cf72c JA	263	sd->events = sd->queued;
e51cf72c JA	264	sd->queued = 0;
1d2af02a JA	265	return fio_vsyncio_end(td, ret);
	266	}
	267
	268	static int fio_vsyncio_init(struct thread_data *td)
	269	{
	270	struct syncio_data *sd;
	271
	272	sd = malloc(sizeof(*sd));
	273	memset(sd, 0, sizeof(*sd));
	274	sd->last_offset = -1ULL;
	275	sd->iovecs = malloc(td->o.iodepth * sizeof(struct iovec));
	276	sd->io_us = malloc(td->o.iodepth * sizeof(struct io_u *));
	277
	278	td->io_ops->data = sd;
	279	return 0;
	280	}
	281
	282	static void fio_vsyncio_cleanup(struct thread_data *td)
	283	{
	284	struct syncio_data *sd = td->io_ops->data;
	285
	286	free(sd->iovecs);
	287	free(sd->io_us);
	288	free(sd);
1d2af02a JA	289	}
1d2af02a JA	290
a31041ea	291	static struct ioengine_ops ioengine_rw = {
2866c82d JA	292	.name = "sync",
2866c82d JA	293	.version = FIO_IOOPS_VERSION,
2866c82d JA	294	.prep = fio_syncio_prep,
2866c82d JA	295	.queue = fio_syncio_queue,
b5af8293 JA	296	.open_file = generic_open_file,
b5af8293 JA	297	.close_file = generic_close_file,
df9c26b1	298	.get_file_size = generic_get_file_size,
2866c82d JA	299	.flags = FIO_SYNCIO,
2866c82d JA	300	};
5f350952	301
a31041ea	302	static struct ioengine_ops ioengine_prw = {
	303	.name = "psync",
	304	.version = FIO_IOOPS_VERSION,
2bd3eabc	305	.queue = fio_psyncio_queue,
a31041ea	306	.open_file = generic_open_file,
a31041ea	307	.close_file = generic_close_file,
df9c26b1	308	.get_file_size = generic_get_file_size,
a31041ea	309	.flags = FIO_SYNCIO,
	310	};
	311
1d2af02a JA	312	static struct ioengine_ops ioengine_vrw = {
	313	.name = "vsync",
	314	.version = FIO_IOOPS_VERSION,
	315	.init = fio_vsyncio_init,
	316	.cleanup = fio_vsyncio_cleanup,
	317	.queue = fio_vsyncio_queue,
	318	.commit = fio_vsyncio_commit,
	319	.event = fio_vsyncio_event,
	320	.getevents = fio_vsyncio_getevents,
	321	.open_file = generic_open_file,
	322	.close_file = generic_close_file,
df9c26b1	323	.get_file_size = generic_get_file_size,
1d2af02a JA	324	.flags = FIO_SYNCIO,
	325	};
	326
5f350952 JA	327	static void fio_init fio_syncio_register(void)
5f350952 JA	328	{
a31041ea	329	register_ioengine(&ioengine_rw);
a31041ea	330	register_ioengine(&ioengine_prw);
1d2af02a	331	register_ioengine(&ioengine_vrw);
5f350952 JA	332	}
	333
	334	static void fio_exit fio_syncio_unregister(void)
	335	{
a31041ea	336	unregister_ioengine(&ioengine_rw);
a31041ea	337	unregister_ioengine(&ioengine_prw);
1d2af02a	338	unregister_ioengine(&ioengine_vrw);
5f350952	339	}