[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"

/*
 * Sync engine uses engine_data to store last offset
 */
#define LAST_POS(f)	((f)->engine_data)

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 (LAST_POS(f) != -1ULL && LAST_POS(f) == 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))
		LAST_POS(io_u->file) = 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
	1	/*
	2	* sync/psync engine
	3	*
	4	* IO engine that does regular read(2)/write(2) with lseek(2) to transfer
	5	* data and IO engine that does regular pread(2)/pwrite(2) to transfer data.
	6	*
	7	*/
	8	#include <stdio.h>
	9	#include <stdlib.h>
	10	#include <unistd.h>
	11	#include <sys/uio.h>
	12	#include <errno.h>
	13	#include <assert.h>
	14
	15	#include "../fio.h"
	16
	17	/*
	18	* Sync engine uses engine_data to store last offset
	19	*/
	20	#define LAST_POS(f) ((f)->engine_data)
	21
	22	struct syncio_data {
	23	struct iovec *iovecs;
	24	struct io_u **io_us;
	25	unsigned int queued;
	26	unsigned int events;
	27	unsigned long queued_bytes;
	28
	29	unsigned long long last_offset;
	30	struct fio_file *last_file;
	31	enum fio_ddir last_ddir;
	32	};
	33
	34	static int fio_syncio_prep(struct thread_data td, struct io_u io_u)
	35	{
	36	struct fio_file *f = io_u->file;
	37
	38	if (!ddir_rw(io_u->ddir))
	39	return 0;
	40
	41	if (LAST_POS(f) != -1ULL && LAST_POS(f) == io_u->offset)
	42	return 0;
	43
	44	if (lseek(f->fd, io_u->offset, SEEK_SET) == -1) {
	45	td_verror(td, errno, "lseek");
	46	return 1;
	47	}
	48
	49	return 0;
	50	}
	51
	52	static int fio_io_end(struct thread_data td, struct io_u io_u, int ret)
	53	{
	54	if (io_u->file && ret >= 0 && ddir_rw(io_u->ddir))
	55	LAST_POS(io_u->file) = io_u->offset + ret;
	56
	57	if (ret != (int) io_u->xfer_buflen) {
	58	if (ret >= 0) {
	59	io_u->resid = io_u->xfer_buflen - ret;
	60	io_u->error = 0;
	61	return FIO_Q_COMPLETED;
	62	} else
	63	io_u->error = errno;
	64	}
	65
	66	if (io_u->error)
	67	td_verror(td, io_u->error, "xfer");
	68
	69	return FIO_Q_COMPLETED;
	70	}
	71
	72	static int fio_psyncio_queue(struct thread_data td, struct io_u io_u)
	73	{
	74	struct fio_file *f = io_u->file;
	75	int ret;
	76
	77	fio_ro_check(td, io_u);
	78
	79	if (io_u->ddir == DDIR_READ)
	80	ret = pread(f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset);
	81	else if (io_u->ddir == DDIR_WRITE)
	82	ret = pwrite(f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset);
	83	else if (io_u->ddir == DDIR_TRIM) {
	84	do_io_u_trim(td, io_u);
	85	return FIO_Q_COMPLETED;
	86	} else
	87	ret = do_io_u_sync(td, io_u);
	88
	89	return fio_io_end(td, io_u, ret);
	90	}
	91
	92	static int fio_syncio_queue(struct thread_data td, struct io_u io_u)
	93	{
	94	struct fio_file *f = io_u->file;
	95	int ret;
	96
	97	fio_ro_check(td, io_u);
	98
	99	if (io_u->ddir == DDIR_READ)
	100	ret = read(f->fd, io_u->xfer_buf, io_u->xfer_buflen);
	101	else if (io_u->ddir == DDIR_WRITE)
	102	ret = write(f->fd, io_u->xfer_buf, io_u->xfer_buflen);
	103	else if (io_u->ddir == DDIR_TRIM) {
	104	do_io_u_trim(td, io_u);
	105	return FIO_Q_COMPLETED;
	106	} else
	107	ret = do_io_u_sync(td, io_u);
	108
	109	return fio_io_end(td, io_u, ret);
	110	}
	111
	112	static int fio_vsyncio_getevents(struct thread_data *td, unsigned int min,
	113	unsigned int max,
	114	struct timespec fio_unused *t)
	115	{
	116	struct syncio_data *sd = td->io_ops->data;
	117	int ret;
	118
	119	if (min) {
	120	ret = sd->events;
	121	sd->events = 0;
	122	} else
	123	ret = 0;
	124
	125	dprint(FD_IO, "vsyncio_getevents: min=%d,max=%d: %d\n", min, max, ret);
	126	return ret;
	127	}
	128
	129	static struct io_u fio_vsyncio_event(struct thread_data td, int event)
	130	{
	131	struct syncio_data *sd = td->io_ops->data;
	132
	133	return sd->io_us[event];
	134	}
	135
	136	static int fio_vsyncio_append(struct thread_data td, struct io_u io_u)
	137	{
	138	struct syncio_data *sd = td->io_ops->data;
	139
	140	if (ddir_sync(io_u->ddir))
	141	return 0;
	142
	143	if (io_u->offset == sd->last_offset && io_u->file == sd->last_file &&
	144	io_u->ddir == sd->last_ddir)
	145	return 1;
	146
	147	return 0;
	148	}
	149
	150	static void fio_vsyncio_set_iov(struct syncio_data sd, struct io_u io_u,
	151	int idx)
	152	{
	153	sd->io_us[idx] = io_u;
	154	sd->iovecs[idx].iov_base = io_u->xfer_buf;
	155	sd->iovecs[idx].iov_len = io_u->xfer_buflen;
	156	sd->last_offset = io_u->offset + io_u->xfer_buflen;
	157	sd->last_file = io_u->file;
	158	sd->last_ddir = io_u->ddir;
	159	sd->queued_bytes += io_u->xfer_buflen;
	160	sd->queued++;
	161	}
	162
	163	static int fio_vsyncio_queue(struct thread_data td, struct io_u io_u)
	164	{
	165	struct syncio_data *sd = td->io_ops->data;
	166
	167	fio_ro_check(td, io_u);
	168
	169	if (!fio_vsyncio_append(td, io_u)) {
	170	dprint(FD_IO, "vsyncio_queue: no append (%d)\n", sd->queued);
	171	/*
	172	* If we can't append and have stuff queued, tell fio to
	173	* commit those first and then retry this io
	174	*/
	175	if (sd->queued)
	176	return FIO_Q_BUSY;
	177	if (ddir_sync(io_u->ddir)) {
	178	int ret = do_io_u_sync(td, io_u);
	179
	180	return fio_io_end(td, io_u, ret);
	181	}
	182
	183	sd->queued = 0;
	184	sd->queued_bytes = 0;
	185	fio_vsyncio_set_iov(sd, io_u, 0);
	186	} else {
	187	if (sd->queued == td->o.iodepth) {
	188	dprint(FD_IO, "vsyncio_queue: max depth %d\n", sd->queued);
	189	return FIO_Q_BUSY;
	190	}
	191
	192	dprint(FD_IO, "vsyncio_queue: append\n");
	193	fio_vsyncio_set_iov(sd, io_u, sd->queued);
	194	}
	195
	196	dprint(FD_IO, "vsyncio_queue: depth now %d\n", sd->queued);
	197	return FIO_Q_QUEUED;
	198	}
	199
	200	/*
	201	* Check that we transferred all bytes, or saw an error, etc
	202	*/
	203	static int fio_vsyncio_end(struct thread_data *td, ssize_t bytes)
	204	{
	205	struct syncio_data *sd = td->io_ops->data;
	206	struct io_u *io_u;
	207	unsigned int i;
	208	int err;
	209
	210	/*
	211	* transferred everything, perfect
	212	*/
	213	if (bytes == sd->queued_bytes)
	214	return 0;
	215
	216	err = errno;
	217	for (i = 0; i < sd->queued; i++) {
	218	io_u = sd->io_us[i];
	219
	220	if (bytes == -1) {
	221	io_u->error = err;
	222	} else {
	223	unsigned int this_io;
	224
	225	this_io = bytes;
	226	if (this_io > io_u->xfer_buflen)
	227	this_io = io_u->xfer_buflen;
	228
	229	io_u->resid = io_u->xfer_buflen - this_io;
	230	io_u->error = 0;
	231	bytes -= this_io;
	232	}
	233	}
	234
	235	if (bytes == -1) {
	236	td_verror(td, err, "xfer vsync");
	237	return -err;
	238	}
	239
	240	return 0;
	241	}
	242
	243	static int fio_vsyncio_commit(struct thread_data *td)
	244	{
	245	struct syncio_data *sd = td->io_ops->data;
	246	struct fio_file *f;
	247	ssize_t ret;
	248
	249	if (!sd->queued)
	250	return 0;
	251
	252	io_u_mark_submit(td, sd->queued);
	253	f = sd->last_file;
	254
	255	if (lseek(f->fd, sd->io_us[0]->offset, SEEK_SET) == -1) {
	256	int err = -errno;
	257
	258	td_verror(td, errno, "lseek");
	259	return err;
	260	}
	261
	262	if (sd->last_ddir == DDIR_READ)
	263	ret = readv(f->fd, sd->iovecs, sd->queued);
	264	else
	265	ret = writev(f->fd, sd->iovecs, sd->queued);
	266
	267	dprint(FD_IO, "vsyncio_commit: %d\n", (int) ret);
	268	sd->events = sd->queued;
	269	sd->queued = 0;
	270	return fio_vsyncio_end(td, ret);
	271	}
	272
	273	static int fio_vsyncio_init(struct thread_data *td)
	274	{
	275	struct syncio_data *sd;
	276
	277	sd = malloc(sizeof(*sd));
	278	memset(sd, 0, sizeof(*sd));
	279	sd->last_offset = -1ULL;
	280	sd->iovecs = malloc(td->o.iodepth * sizeof(struct iovec));
	281	sd->io_us = malloc(td->o.iodepth * sizeof(struct io_u *));
	282
	283	td->io_ops->data = sd;
	284	return 0;
	285	}
	286
	287	static void fio_vsyncio_cleanup(struct thread_data *td)
	288	{
	289	struct syncio_data *sd = td->io_ops->data;
	290
	291	free(sd->iovecs);
	292	free(sd->io_us);
	293	free(sd);
	294	}
	295
	296	static struct ioengine_ops ioengine_rw = {
	297	.name = "sync",
	298	.version = FIO_IOOPS_VERSION,
	299	.prep = fio_syncio_prep,
	300	.queue = fio_syncio_queue,
	301	.open_file = generic_open_file,
	302	.close_file = generic_close_file,
	303	.get_file_size = generic_get_file_size,
	304	.flags = FIO_SYNCIO,
	305	};
	306
	307	static struct ioengine_ops ioengine_prw = {
	308	.name = "psync",
	309	.version = FIO_IOOPS_VERSION,
	310	.queue = fio_psyncio_queue,
	311	.open_file = generic_open_file,
	312	.close_file = generic_close_file,
	313	.get_file_size = generic_get_file_size,
	314	.flags = FIO_SYNCIO,
	315	};
	316
	317	static struct ioengine_ops ioengine_vrw = {
	318	.name = "vsync",
	319	.version = FIO_IOOPS_VERSION,
	320	.init = fio_vsyncio_init,
	321	.cleanup = fio_vsyncio_cleanup,
	322	.queue = fio_vsyncio_queue,
	323	.commit = fio_vsyncio_commit,
	324	.event = fio_vsyncio_event,
	325	.getevents = fio_vsyncio_getevents,
	326	.open_file = generic_open_file,
	327	.close_file = generic_close_file,
	328	.get_file_size = generic_get_file_size,
	329	.flags = FIO_SYNCIO,
	330	};
	331
	332	static void fio_init fio_syncio_register(void)
	333	{
	334	register_ioengine(&ioengine_rw);
	335	register_ioengine(&ioengine_prw);
	336	register_ioengine(&ioengine_vrw);
	337	}
	338
	339	static void fio_exit fio_syncio_unregister(void)
	340	{
	341	unregister_ioengine(&ioengine_rw);
	342	unregister_ioengine(&ioengine_prw);
	343	unregister_ioengine(&ioengine_vrw);
	344	}