[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"
#include "../optgroup.h"

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

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;
};

#ifdef FIO_HAVE_PWRITEV2
struct psyncv2_options {
	void *pad;
	unsigned int hipri;
	unsigned int stream;
};

static struct fio_option options[] = {
	{
		.name	= "hipri",
		.lname	= "RWF_HIPRI",
		.type	= FIO_OPT_STR_SET,
		.off1	= offsetof(struct psyncv2_options, hipri),
		.help	= "Set RWF_HIPRI for pwritev2/preadv2",
		.category = FIO_OPT_C_ENGINE,
		.group	= FIO_OPT_G_INVALID,
	},
	{
		.name	= "stream",
		.lname	= "Stream ID",
		.type	= FIO_OPT_STR,
		.off1	= offsetof(struct psyncv2_options, stream),
		.help	= "Set expected write life time",
		.category = FIO_OPT_C_ENGINE,
		.group	= FIO_OPT_G_INVALID,
		.posval = {
			  { .ival = "short",
			    .oval = RWF_WRITE_LIFE_SHORT,
			  },
			  { .ival = "medium",
			    .oval = RWF_WRITE_LIFE_MEDIUM,
			  },
			  { .ival = "long",
			    .oval = RWF_WRITE_LIFE_LONG,
			  },
			  { .ival = "extreme",
			    .oval = RWF_WRITE_LIFE_EXTREME,
			  },
		},
	},
	{
		.name	= NULL,
	},
};
#endif

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) {
		io_u_log_error(td, io_u);
		td_verror(td, io_u->error, "xfer");
	}

	return FIO_Q_COMPLETED;
}

#ifdef CONFIG_PWRITEV
static int fio_pvsyncio_queue(struct thread_data *td, struct io_u *io_u)
{
	struct syncio_data *sd = td->io_ops_data;
	struct iovec *iov = &sd->iovecs[0];
	struct fio_file *f = io_u->file;
	int ret;

	fio_ro_check(td, io_u);

	iov->iov_base = io_u->xfer_buf;
	iov->iov_len = io_u->xfer_buflen;

	if (io_u->ddir == DDIR_READ)
		ret = preadv(f->fd, iov, 1, io_u->offset);
	else if (io_u->ddir == DDIR_WRITE)
		ret = pwritev(f->fd, iov, 1, 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);
}
#endif

#ifdef FIO_HAVE_PWRITEV2
static int fio_pvsyncio2_queue(struct thread_data *td, struct io_u *io_u)
{
	struct syncio_data *sd = td->io_ops_data;
	struct psyncv2_options *o = td->eo;
	struct iovec *iov = &sd->iovecs[0];
	struct fio_file *f = io_u->file;
	int ret, flags = 0;

	fio_ro_check(td, io_u);

	if (o->hipri)
		flags |= RWF_HIPRI;
	if (o->stream)
		flags |= o->stream;

	iov->iov_base = io_u->xfer_buf;
	iov->iov_len = io_u->xfer_buflen;

	if (io_u->ddir == DDIR_READ)
		ret = preadv2(f->fd, iov, 1, io_u->offset, flags);
	else if (io_u->ddir == DDIR_WRITE)
		ret = pwritev2(f->fd, iov, 1, io_u->offset, flags);
	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);
}
#endif


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,
				 const 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;

	if (sd) {
		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,
};

#ifdef CONFIG_PWRITEV
static struct ioengine_ops ioengine_pvrw = {
	.name		= "pvsync",
	.version	= FIO_IOOPS_VERSION,
	.init		= fio_vsyncio_init,
	.cleanup	= fio_vsyncio_cleanup,
	.queue		= fio_pvsyncio_queue,
	.open_file	= generic_open_file,
	.close_file	= generic_close_file,
	.get_file_size	= generic_get_file_size,
	.flags		= FIO_SYNCIO,
};
#endif

#ifdef FIO_HAVE_PWRITEV2
static struct ioengine_ops ioengine_pvrw2 = {
	.name		= "pvsync2",
	.version	= FIO_IOOPS_VERSION,
	.init		= fio_vsyncio_init,
	.cleanup	= fio_vsyncio_cleanup,
	.queue		= fio_pvsyncio2_queue,
	.open_file	= generic_open_file,
	.close_file	= generic_close_file,
	.get_file_size	= generic_get_file_size,
	.flags		= FIO_SYNCIO,
	.options	= options,
	.option_struct_size	= sizeof(struct psyncv2_options),
};
#endif

static void fio_init fio_syncio_register(void)
{
	register_ioengine(&ioengine_rw);
	register_ioengine(&ioengine_prw);
	register_ioengine(&ioengine_vrw);
#ifdef CONFIG_PWRITEV
	register_ioengine(&ioengine_pvrw);
#endif
#ifdef FIO_HAVE_PWRITEV2
	register_ioengine(&ioengine_pvrw2);
#endif
}

static void fio_exit fio_syncio_unregister(void)
{
	unregister_ioengine(&ioengine_rw);
	unregister_ioengine(&ioengine_prw);
	unregister_ioengine(&ioengine_vrw);
#ifdef CONFIG_PWRITEV
	unregister_ioengine(&ioengine_pvrw);
#endif
#ifdef FIO_HAVE_PWRITEV2
	unregister_ioengine(&ioengine_pvrw2);
#endif
}
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"
2cafffbe	16	#include "../optgroup.h"
2866c82d	17
ef5f5a3a JA	18	/*
	19	* Sync engine uses engine_data to store last offset
	20	*/
710bf9c5	21	#define LAST_POS(f) ((f)->engine_pos)
ef5f5a3a	22
1d2af02a JA	23	struct syncio_data {
	24	struct iovec *iovecs;
	25	struct io_u **io_us;
	26	unsigned int queued;
e51cf72c	27	unsigned int events;
1d2af02a JA	28	unsigned long queued_bytes;
	29
	30	unsigned long long last_offset;
	31	struct fio_file *last_file;
	32	enum fio_ddir last_ddir;
	33	};
	34
6562685f	35	#ifdef FIO_HAVE_PWRITEV2
2cafffbe JA	36	struct psyncv2_options {
	37	void *pad;
	38	unsigned int hipri;
72cd4146	39	unsigned int stream;
2cafffbe JA	40	};
	41
	42	static struct fio_option options[] = {
	43	{
	44	.name = "hipri",
	45	.lname = "RWF_HIPRI",
	46	.type = FIO_OPT_STR_SET,
	47	.off1 = offsetof(struct psyncv2_options, hipri),
	48	.help = "Set RWF_HIPRI for pwritev2/preadv2",
	49	.category = FIO_OPT_C_ENGINE,
	50	.group = FIO_OPT_G_INVALID,
	51	},
72cd4146 JA	52	{
	53	.name = "stream",
	54	.lname = "Stream ID",
	55	.type = FIO_OPT_STR,
	56	.off1 = offsetof(struct psyncv2_options, stream),
	57	.help = "Set expected write life time",
	58	.category = FIO_OPT_C_ENGINE,
	59	.group = FIO_OPT_G_INVALID,
	60	.posval = {
	61	{ .ival = "short",
	62	.oval = RWF_WRITE_LIFE_SHORT,
	63	},
	64	{ .ival = "medium",
	65	.oval = RWF_WRITE_LIFE_MEDIUM,
	66	},
	67	{ .ival = "long",
	68	.oval = RWF_WRITE_LIFE_LONG,
	69	},
	70	{ .ival = "extreme",
	71	.oval = RWF_WRITE_LIFE_EXTREME,
	72	},
	73	},
	74	},
2cafffbe JA	75	{
	76	.name = NULL,
	77	},
	78	};
	79	#endif
	80
2866c82d JA	81	static int fio_syncio_prep(struct thread_data td, struct io_u io_u)
2866c82d JA	82	{
53cdc686 JA	83	struct fio_file *f = io_u->file;
53cdc686 JA	84
ff58fced	85	if (!ddir_rw(io_u->ddir))
87dc1ab1 JA	86	return 0;
87dc1ab1 JA	87
ef5f5a3a	88	if (LAST_POS(f) != -1ULL && LAST_POS(f) == io_u->offset)
e943b878 JA	89	return 0;
e943b878 JA	90
53cdc686	91	if (lseek(f->fd, io_u->offset, SEEK_SET) == -1) {
e1161c32	92	td_verror(td, errno, "lseek");
2866c82d JA	93	return 1;
	94	}
	95
	96	return 0;
	97	}
	98
2bd3eabc	99	static int fio_io_end(struct thread_data td, struct io_u io_u, int ret)
2866c82d	100	{
ff58fced	101	if (io_u->file && ret >= 0 && ddir_rw(io_u->ddir))
ef5f5a3a	102	LAST_POS(io_u->file) = io_u->offset + ret;
e943b878	103
cec6b55d	104	if (ret != (int) io_u->xfer_buflen) {
22819ec2	105	if (ret >= 0) {
cec6b55d JA	106	io_u->resid = io_u->xfer_buflen - ret;
cec6b55d JA	107	io_u->error = 0;
36167d82	108	return FIO_Q_COMPLETED;
2866c82d JA	109	} else
	110	io_u->error = errno;
	111	}
	112
bfd197cb JA	113	if (io_u->error) {
bfd197cb JA	114	io_u_log_error(td, io_u);
e1161c32	115	td_verror(td, io_u->error, "xfer");
bfd197cb	116	}
2866c82d	117
36167d82	118	return FIO_Q_COMPLETED;
2866c82d JA	119	}
2866c82d JA	120
07fc0acd JA	121	#ifdef CONFIG_PWRITEV
	122	static int fio_pvsyncio_queue(struct thread_data td, struct io_u io_u)
	123	{
565e784d	124	struct syncio_data *sd = td->io_ops_data;
07fc0acd JA	125	struct iovec *iov = &sd->iovecs[0];
	126	struct fio_file *f = io_u->file;
	127	int ret;
	128
	129	fio_ro_check(td, io_u);
	130
	131	iov->iov_base = io_u->xfer_buf;
	132	iov->iov_len = io_u->xfer_buflen;
	133
	134	if (io_u->ddir == DDIR_READ)
	135	ret = preadv(f->fd, iov, 1, io_u->offset);
	136	else if (io_u->ddir == DDIR_WRITE)
	137	ret = pwritev(f->fd, iov, 1, io_u->offset);
	138	else if (io_u->ddir == DDIR_TRIM) {
	139	do_io_u_trim(td, io_u);
	140	return FIO_Q_COMPLETED;
	141	} else
	142	ret = do_io_u_sync(td, io_u);
	143
	144	return fio_io_end(td, io_u, ret);
	145	}
	146	#endif
	147
6562685f	148	#ifdef FIO_HAVE_PWRITEV2
2cafffbe JA	149	static int fio_pvsyncio2_queue(struct thread_data td, struct io_u io_u)
2cafffbe JA	150	{
565e784d	151	struct syncio_data *sd = td->io_ops_data;
2cafffbe JA	152	struct psyncv2_options *o = td->eo;
	153	struct iovec *iov = &sd->iovecs[0];
	154	struct fio_file *f = io_u->file;
	155	int ret, flags = 0;
	156
	157	fio_ro_check(td, io_u);
	158
	159	if (o->hipri)
	160	flags \|= RWF_HIPRI;
72cd4146 JA	161	if (o->stream)
72cd4146 JA	162	flags \|= o->stream;
2cafffbe JA	163
	164	iov->iov_base = io_u->xfer_buf;
	165	iov->iov_len = io_u->xfer_buflen;
	166
	167	if (io_u->ddir == DDIR_READ)
	168	ret = preadv2(f->fd, iov, 1, io_u->offset, flags);
	169	else if (io_u->ddir == DDIR_WRITE)
	170	ret = pwritev2(f->fd, iov, 1, io_u->offset, flags);
	171	else if (io_u->ddir == DDIR_TRIM) {
	172	do_io_u_trim(td, io_u);
	173	return FIO_Q_COMPLETED;
	174	} else
	175	ret = do_io_u_sync(td, io_u);
	176
	177	return fio_io_end(td, io_u, ret);
	178	}
	179	#endif
	180
	181
2bd3eabc	182	static int fio_psyncio_queue(struct thread_data td, struct io_u io_u)
a31041ea	183	{
2bd3eabc JA	184	struct fio_file *f = io_u->file;
	185	int ret;
	186
	187	fio_ro_check(td, io_u);
	188
	189	if (io_u->ddir == DDIR_READ)
	190	ret = pread(f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset);
	191	else if (io_u->ddir == DDIR_WRITE)
	192	ret = pwrite(f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset);
6eaf09d6 SL	193	else if (io_u->ddir == DDIR_TRIM) {
	194	do_io_u_trim(td, io_u);
	195	return FIO_Q_COMPLETED;
	196	} else
0a28ecda	197	ret = do_io_u_sync(td, io_u);
2bd3eabc JA	198
	199	return fio_io_end(td, io_u, ret);
	200	}
	201
	202	static int fio_syncio_queue(struct thread_data td, struct io_u io_u)
	203	{
	204	struct fio_file *f = io_u->file;
	205	int ret;
	206
	207	fio_ro_check(td, io_u);
	208
	209	if (io_u->ddir == DDIR_READ)
	210	ret = read(f->fd, io_u->xfer_buf, io_u->xfer_buflen);
	211	else if (io_u->ddir == DDIR_WRITE)
	212	ret = write(f->fd, io_u->xfer_buf, io_u->xfer_buflen);
6eaf09d6 SL	213	else if (io_u->ddir == DDIR_TRIM) {
	214	do_io_u_trim(td, io_u);
	215	return FIO_Q_COMPLETED;
	216	} else
0a28ecda	217	ret = do_io_u_sync(td, io_u);
2bd3eabc JA	218
2bd3eabc JA	219	return fio_io_end(td, io_u, ret);
a31041ea	220	}
a31041ea	221
1d2af02a JA	222	static int fio_vsyncio_getevents(struct thread_data *td, unsigned int min,
1d2af02a JA	223	unsigned int max,
1f440ece	224	const struct timespec fio_unused *t)
1d2af02a	225	{
565e784d	226	struct syncio_data *sd = td->io_ops_data;
1d2af02a JA	227	int ret;
	228
	229	if (min) {
e51cf72c JA	230	ret = sd->events;
e51cf72c JA	231	sd->events = 0;
1d2af02a JA	232	} else
	233	ret = 0;
	234
	235	dprint(FD_IO, "vsyncio_getevents: min=%d,max=%d: %d\n", min, max, ret);
	236	return ret;
	237	}
	238
	239	static struct io_u fio_vsyncio_event(struct thread_data td, int event)
	240	{
565e784d	241	struct syncio_data *sd = td->io_ops_data;
1d2af02a JA	242
	243	return sd->io_us[event];
	244	}
	245
	246	static int fio_vsyncio_append(struct thread_data td, struct io_u io_u)
	247	{
565e784d	248	struct syncio_data *sd = td->io_ops_data;
1d2af02a	249
5f9099ea	250	if (ddir_sync(io_u->ddir))
1d2af02a JA	251	return 0;
	252
	253	if (io_u->offset == sd->last_offset && io_u->file == sd->last_file &&
	254	io_u->ddir == sd->last_ddir)
	255	return 1;
	256
	257	return 0;
	258	}
	259
	260	static void fio_vsyncio_set_iov(struct syncio_data sd, struct io_u io_u,
2b13e716	261	int idx)
1d2af02a	262	{
2b13e716 JA	263	sd->io_us[idx] = io_u;
	264	sd->iovecs[idx].iov_base = io_u->xfer_buf;
	265	sd->iovecs[idx].iov_len = io_u->xfer_buflen;
1d2af02a JA	266	sd->last_offset = io_u->offset + io_u->xfer_buflen;
	267	sd->last_file = io_u->file;
	268	sd->last_ddir = io_u->ddir;
	269	sd->queued_bytes += io_u->xfer_buflen;
	270	sd->queued++;
	271	}
	272
	273	static int fio_vsyncio_queue(struct thread_data td, struct io_u io_u)
	274	{
565e784d	275	struct syncio_data *sd = td->io_ops_data;
1d2af02a JA	276
	277	fio_ro_check(td, io_u);
	278
	279	if (!fio_vsyncio_append(td, io_u)) {
	280	dprint(FD_IO, "vsyncio_queue: no append (%d)\n", sd->queued);
	281	/*
	282	* If we can't append and have stuff queued, tell fio to
	283	* commit those first and then retry this io
	284	*/
	285	if (sd->queued)
	286	return FIO_Q_BUSY;
0a28ecda JA	287	if (ddir_sync(io_u->ddir)) {
	288	int ret = do_io_u_sync(td, io_u);
	289
	290	return fio_io_end(td, io_u, ret);
	291	}
cc9159c3	292
1d2af02a JA	293	sd->queued = 0;
	294	sd->queued_bytes = 0;
	295	fio_vsyncio_set_iov(sd, io_u, 0);
	296	} else {
	297	if (sd->queued == td->o.iodepth) {
	298	dprint(FD_IO, "vsyncio_queue: max depth %d\n", sd->queued);
	299	return FIO_Q_BUSY;
	300	}
	301
	302	dprint(FD_IO, "vsyncio_queue: append\n");
	303	fio_vsyncio_set_iov(sd, io_u, sd->queued);
	304	}
	305
	306	dprint(FD_IO, "vsyncio_queue: depth now %d\n", sd->queued);
	307	return FIO_Q_QUEUED;
	308	}
	309
	310	/*
	311	* Check that we transferred all bytes, or saw an error, etc
	312	*/
	313	static int fio_vsyncio_end(struct thread_data *td, ssize_t bytes)
	314	{
565e784d	315	struct syncio_data *sd = td->io_ops_data;
1d2af02a JA	316	struct io_u *io_u;
	317	unsigned int i;
	318	int err;
	319
	320	/*
	321	* transferred everything, perfect
	322	*/
	323	if (bytes == sd->queued_bytes)
	324	return 0;
	325
	326	err = errno;
	327	for (i = 0; i < sd->queued; i++) {
	328	io_u = sd->io_us[i];
	329
	330	if (bytes == -1) {
	331	io_u->error = err;
	332	} else {
	333	unsigned int this_io;
	334
	335	this_io = bytes;
	336	if (this_io > io_u->xfer_buflen)
	337	this_io = io_u->xfer_buflen;
	338
	339	io_u->resid = io_u->xfer_buflen - this_io;
	340	io_u->error = 0;
	341	bytes -= this_io;
	342	}
	343	}
	344
	345	if (bytes == -1) {
	346	td_verror(td, err, "xfer vsync");
	347	return -err;
	348	}
	349
	350	return 0;
	351	}
	352
	353	static int fio_vsyncio_commit(struct thread_data *td)
	354	{
565e784d	355	struct syncio_data *sd = td->io_ops_data;
1d2af02a JA	356	struct fio_file *f;
	357	ssize_t ret;
	358
	359	if (!sd->queued)
	360	return 0;
	361
838bc709	362	io_u_mark_submit(td, sd->queued);
1d2af02a JA	363	f = sd->last_file;
	364
	365	if (lseek(f->fd, sd->io_us[0]->offset, SEEK_SET) == -1) {
	366	int err = -errno;
	367
	368	td_verror(td, errno, "lseek");
	369	return err;
	370	}
	371
	372	if (sd->last_ddir == DDIR_READ)
	373	ret = readv(f->fd, sd->iovecs, sd->queued);
	374	else
	375	ret = writev(f->fd, sd->iovecs, sd->queued);
	376
	377	dprint(FD_IO, "vsyncio_commit: %d\n", (int) ret);
e51cf72c JA	378	sd->events = sd->queued;
e51cf72c JA	379	sd->queued = 0;
1d2af02a JA	380	return fio_vsyncio_end(td, ret);
	381	}
	382
	383	static int fio_vsyncio_init(struct thread_data *td)
	384	{
	385	struct syncio_data *sd;
	386
	387	sd = malloc(sizeof(*sd));
	388	memset(sd, 0, sizeof(*sd));
	389	sd->last_offset = -1ULL;
	390	sd->iovecs = malloc(td->o.iodepth * sizeof(struct iovec));
	391	sd->io_us = malloc(td->o.iodepth * sizeof(struct io_u *));
	392
565e784d	393	td->io_ops_data = sd;
1d2af02a JA	394	return 0;
	395	}
	396
	397	static void fio_vsyncio_cleanup(struct thread_data *td)
	398	{
565e784d	399	struct syncio_data *sd = td->io_ops_data;
1d2af02a	400
02a3d83f TK	401	if (sd) {
	402	free(sd->iovecs);
	403	free(sd->io_us);
	404	free(sd);
	405	}
1d2af02a JA	406	}
1d2af02a JA	407
a31041ea	408	static struct ioengine_ops ioengine_rw = {
2866c82d JA	409	.name = "sync",
2866c82d JA	410	.version = FIO_IOOPS_VERSION,
2866c82d JA	411	.prep = fio_syncio_prep,
2866c82d JA	412	.queue = fio_syncio_queue,
b5af8293 JA	413	.open_file = generic_open_file,
b5af8293 JA	414	.close_file = generic_close_file,
df9c26b1	415	.get_file_size = generic_get_file_size,
2866c82d JA	416	.flags = FIO_SYNCIO,
2866c82d JA	417	};
5f350952	418
a31041ea	419	static struct ioengine_ops ioengine_prw = {
	420	.name = "psync",
	421	.version = FIO_IOOPS_VERSION,
2bd3eabc	422	.queue = fio_psyncio_queue,
a31041ea	423	.open_file = generic_open_file,
a31041ea	424	.close_file = generic_close_file,
df9c26b1	425	.get_file_size = generic_get_file_size,
a31041ea	426	.flags = FIO_SYNCIO,
	427	};
	428
1d2af02a JA	429	static struct ioengine_ops ioengine_vrw = {
	430	.name = "vsync",
	431	.version = FIO_IOOPS_VERSION,
	432	.init = fio_vsyncio_init,
	433	.cleanup = fio_vsyncio_cleanup,
	434	.queue = fio_vsyncio_queue,
	435	.commit = fio_vsyncio_commit,
	436	.event = fio_vsyncio_event,
	437	.getevents = fio_vsyncio_getevents,
	438	.open_file = generic_open_file,
	439	.close_file = generic_close_file,
df9c26b1	440	.get_file_size = generic_get_file_size,
1d2af02a JA	441	.flags = FIO_SYNCIO,
	442	};
	443
07fc0acd JA	444	#ifdef CONFIG_PWRITEV
	445	static struct ioengine_ops ioengine_pvrw = {
	446	.name = "pvsync",
	447	.version = FIO_IOOPS_VERSION,
	448	.init = fio_vsyncio_init,
	449	.cleanup = fio_vsyncio_cleanup,
	450	.queue = fio_pvsyncio_queue,
	451	.open_file = generic_open_file,
	452	.close_file = generic_close_file,
	453	.get_file_size = generic_get_file_size,
	454	.flags = FIO_SYNCIO,
	455	};
	456	#endif
	457
6562685f	458	#ifdef FIO_HAVE_PWRITEV2
2cafffbe JA	459	static struct ioengine_ops ioengine_pvrw2 = {
	460	.name = "pvsync2",
	461	.version = FIO_IOOPS_VERSION,
	462	.init = fio_vsyncio_init,
	463	.cleanup = fio_vsyncio_cleanup,
	464	.queue = fio_pvsyncio2_queue,
	465	.open_file = generic_open_file,
	466	.close_file = generic_close_file,
	467	.get_file_size = generic_get_file_size,
	468	.flags = FIO_SYNCIO,
	469	.options = options,
	470	.option_struct_size = sizeof(struct psyncv2_options),
	471	};
	472	#endif
	473
5f350952 JA	474	static void fio_init fio_syncio_register(void)
5f350952 JA	475	{
a31041ea	476	register_ioengine(&ioengine_rw);
a31041ea	477	register_ioengine(&ioengine_prw);
1d2af02a	478	register_ioengine(&ioengine_vrw);
9a0ced5a	479	#ifdef CONFIG_PWRITEV
07fc0acd	480	register_ioengine(&ioengine_pvrw);
9a0ced5a	481	#endif
6562685f	482	#ifdef FIO_HAVE_PWRITEV2
526c403d JD	483	register_ioengine(&ioengine_pvrw2);
526c403d JD	484	#endif
5f350952 JA	485	}
	486
	487	static void fio_exit fio_syncio_unregister(void)
	488	{
a31041ea	489	unregister_ioengine(&ioengine_rw);
a31041ea	490	unregister_ioengine(&ioengine_prw);
1d2af02a	491	unregister_ioengine(&ioengine_vrw);
9a0ced5a	492	#ifdef CONFIG_PWRITEV
07fc0acd	493	unregister_ioengine(&ioengine_pvrw);
9a0ced5a	494	#endif
6562685f	495	#ifdef FIO_HAVE_PWRITEV2
526c403d JD	496	unregister_ioengine(&ioengine_pvrw2);
526c403d JD	497	#endif
5f350952	498	}