[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)
		ret = do_io_u_trim(td, io_u);
	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)
		ret = do_io_u_trim(td, io_u);
	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 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 (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);
a5f3027c JA	78	else if (io_u->ddir == DDIR_TRIM)
a5f3027c JA	79	ret = do_io_u_trim(td, io_u);
2bd3eabc	80	else
0a28ecda	81	ret = do_io_u_sync(td, io_u);
2bd3eabc JA	82
	83	return fio_io_end(td, io_u, ret);
	84	}
	85
	86	static int fio_syncio_queue(struct thread_data td, struct io_u io_u)
	87	{
	88	struct fio_file *f = io_u->file;
	89	int ret;
	90
	91	fio_ro_check(td, io_u);
	92
	93	if (io_u->ddir == DDIR_READ)
	94	ret = read(f->fd, io_u->xfer_buf, io_u->xfer_buflen);
	95	else if (io_u->ddir == DDIR_WRITE)
	96	ret = write(f->fd, io_u->xfer_buf, io_u->xfer_buflen);
a5f3027c JA	97	else if (io_u->ddir == DDIR_TRIM)
a5f3027c JA	98	ret = do_io_u_trim(td, io_u);
2bd3eabc	99	else
0a28ecda	100	ret = do_io_u_sync(td, io_u);
2bd3eabc JA	101
2bd3eabc JA	102	return fio_io_end(td, io_u, ret);
a31041ea	103	}
a31041ea	104
1d2af02a JA	105	static int fio_vsyncio_getevents(struct thread_data *td, unsigned int min,
	106	unsigned int max,
	107	struct timespec fio_unused *t)
	108	{
	109	struct syncio_data *sd = td->io_ops->data;
	110	int ret;
	111
	112	if (min) {
e51cf72c JA	113	ret = sd->events;
e51cf72c JA	114	sd->events = 0;
1d2af02a JA	115	} else
	116	ret = 0;
	117
	118	dprint(FD_IO, "vsyncio_getevents: min=%d,max=%d: %d\n", min, max, ret);
	119	return ret;
	120	}
	121
	122	static struct io_u fio_vsyncio_event(struct thread_data td, int event)
	123	{
	124	struct syncio_data *sd = td->io_ops->data;
	125
	126	return sd->io_us[event];
	127	}
	128
	129	static int fio_vsyncio_append(struct thread_data td, struct io_u io_u)
	130	{
	131	struct syncio_data *sd = td->io_ops->data;
	132
5f9099ea	133	if (ddir_sync(io_u->ddir))
1d2af02a JA	134	return 0;
	135
	136	if (io_u->offset == sd->last_offset && io_u->file == sd->last_file &&
	137	io_u->ddir == sd->last_ddir)
	138	return 1;
	139
	140	return 0;
	141	}
	142
	143	static void fio_vsyncio_set_iov(struct syncio_data sd, struct io_u io_u,
	144	int index)
	145	{
	146	sd->io_us[index] = io_u;
	147	sd->iovecs[index].iov_base = io_u->xfer_buf;
	148	sd->iovecs[index].iov_len = io_u->xfer_buflen;
	149	sd->last_offset = io_u->offset + io_u->xfer_buflen;
	150	sd->last_file = io_u->file;
	151	sd->last_ddir = io_u->ddir;
	152	sd->queued_bytes += io_u->xfer_buflen;
	153	sd->queued++;
	154	}
	155
	156	static int fio_vsyncio_queue(struct thread_data td, struct io_u io_u)
	157	{
	158	struct syncio_data *sd = td->io_ops->data;
	159
	160	fio_ro_check(td, io_u);
	161
	162	if (!fio_vsyncio_append(td, io_u)) {
	163	dprint(FD_IO, "vsyncio_queue: no append (%d)\n", sd->queued);
	164	/*
	165	* If we can't append and have stuff queued, tell fio to
	166	* commit those first and then retry this io
	167	*/
	168	if (sd->queued)
	169	return FIO_Q_BUSY;
0a28ecda JA	170	if (ddir_sync(io_u->ddir)) {
	171	int ret = do_io_u_sync(td, io_u);
	172
	173	return fio_io_end(td, io_u, ret);
	174	}
cc9159c3	175
1d2af02a JA	176	sd->queued = 0;
	177	sd->queued_bytes = 0;
	178	fio_vsyncio_set_iov(sd, io_u, 0);
	179	} else {
	180	if (sd->queued == td->o.iodepth) {
	181	dprint(FD_IO, "vsyncio_queue: max depth %d\n", sd->queued);
	182	return FIO_Q_BUSY;
	183	}
	184
	185	dprint(FD_IO, "vsyncio_queue: append\n");
	186	fio_vsyncio_set_iov(sd, io_u, sd->queued);
	187	}
	188
	189	dprint(FD_IO, "vsyncio_queue: depth now %d\n", sd->queued);
	190	return FIO_Q_QUEUED;
	191	}
	192
	193	/*
	194	* Check that we transferred all bytes, or saw an error, etc
	195	*/
	196	static int fio_vsyncio_end(struct thread_data *td, ssize_t bytes)
	197	{
	198	struct syncio_data *sd = td->io_ops->data;
	199	struct io_u *io_u;
	200	unsigned int i;
	201	int err;
	202
	203	/*
	204	* transferred everything, perfect
	205	*/
	206	if (bytes == sd->queued_bytes)
	207	return 0;
	208
	209	err = errno;
	210	for (i = 0; i < sd->queued; i++) {
	211	io_u = sd->io_us[i];
	212
	213	if (bytes == -1) {
	214	io_u->error = err;
	215	} else {
	216	unsigned int this_io;
	217
	218	this_io = bytes;
	219	if (this_io > io_u->xfer_buflen)
	220	this_io = io_u->xfer_buflen;
	221
	222	io_u->resid = io_u->xfer_buflen - this_io;
	223	io_u->error = 0;
	224	bytes -= this_io;
	225	}
	226	}
	227
	228	if (bytes == -1) {
	229	td_verror(td, err, "xfer vsync");
	230	return -err;
	231	}
	232
	233	return 0;
	234	}
	235
	236	static int fio_vsyncio_commit(struct thread_data *td)
	237	{
	238	struct syncio_data *sd = td->io_ops->data;
	239	struct fio_file *f;
240	ssize_t ret;
241
242	if (!sd->queued)
243	return 0;
244
838bc709	245	io_u_mark_submit(td, sd->queued);
1d2af02a JA	246	f = sd->last_file;
	247
	248	if (lseek(f->fd, sd->io_us[0]->offset, SEEK_SET) == -1) {
	249	int err = -errno;
	250
	251	td_verror(td, errno, "lseek");
	252	return err;
	253	}
	254
	255	if (sd->last_ddir == DDIR_READ)
	256	ret = readv(f->fd, sd->iovecs, sd->queued);
	257	else
	258	ret = writev(f->fd, sd->iovecs, sd->queued);
	259
	260	dprint(FD_IO, "vsyncio_commit: %d\n", (int) ret);
e51cf72c JA	261	sd->events = sd->queued;
e51cf72c JA	262	sd->queued = 0;
1d2af02a JA	263	return fio_vsyncio_end(td, ret);
	264	}
	265
	266	static int fio_vsyncio_init(struct thread_data *td)
	267	{
	268	struct syncio_data *sd;
	269
	270	sd = malloc(sizeof(*sd));
	271	memset(sd, 0, sizeof(*sd));
	272	sd->last_offset = -1ULL;
	273	sd->iovecs = malloc(td->o.iodepth * sizeof(struct iovec));
	274	sd->io_us = malloc(td->o.iodepth * sizeof(struct io_u *));
	275
	276	td->io_ops->data = sd;
	277	return 0;
	278	}
	279
	280	static void fio_vsyncio_cleanup(struct thread_data *td)
	281	{
	282	struct syncio_data *sd = td->io_ops->data;
	283
	284	free(sd->iovecs);
	285	free(sd->io_us);
	286	free(sd);
1d2af02a JA	287	}
1d2af02a JA	288
a31041ea	289	static struct ioengine_ops ioengine_rw = {
2866c82d JA	290	.name = "sync",
2866c82d JA	291	.version = FIO_IOOPS_VERSION,
2866c82d JA	292	.prep = fio_syncio_prep,
2866c82d JA	293	.queue = fio_syncio_queue,
b5af8293 JA	294	.open_file = generic_open_file,
b5af8293 JA	295	.close_file = generic_close_file,
df9c26b1	296	.get_file_size = generic_get_file_size,
2866c82d JA	297	.flags = FIO_SYNCIO,
2866c82d JA	298	};
5f350952	299
a31041ea	300	static struct ioengine_ops ioengine_prw = {
	301	.name = "psync",
	302	.version = FIO_IOOPS_VERSION,
2bd3eabc	303	.queue = fio_psyncio_queue,
a31041ea	304	.open_file = generic_open_file,
a31041ea	305	.close_file = generic_close_file,
df9c26b1	306	.get_file_size = generic_get_file_size,
a31041ea	307	.flags = FIO_SYNCIO,
	308	};
	309
1d2af02a JA	310	static struct ioengine_ops ioengine_vrw = {
	311	.name = "vsync",
	312	.version = FIO_IOOPS_VERSION,
	313	.init = fio_vsyncio_init,
	314	.cleanup = fio_vsyncio_cleanup,
	315	.queue = fio_vsyncio_queue,
	316	.commit = fio_vsyncio_commit,
	317	.event = fio_vsyncio_event,
	318	.getevents = fio_vsyncio_getevents,
	319	.open_file = generic_open_file,
	320	.close_file = generic_close_file,
df9c26b1	321	.get_file_size = generic_get_file_size,
1d2af02a JA	322	.flags = FIO_SYNCIO,
	323	};
	324
5f350952 JA	325	static void fio_init fio_syncio_register(void)
5f350952 JA	326	{
a31041ea	327	register_ioengine(&ioengine_rw);
a31041ea	328	register_ioengine(&ioengine_prw);
1d2af02a	329	register_ioengine(&ioengine_vrw);
5f350952 JA	330	}
	331
	332	static void fio_exit fio_syncio_unregister(void)
	333	{
a31041ea	334	unregister_ioengine(&ioengine_rw);
a31041ea	335	unregister_ioengine(&ioengine_prw);
1d2af02a	336	unregister_ioengine(&ioengine_vrw);
5f350952	337	}