engines/sync.c - platform/external/fio - Git at Google

 /*
  * 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;
 }

 #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

 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,
 };

 #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

 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
 }

 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
 }
	/*
	* 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;
	}

	#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

	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,
	};

	#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

	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
	}

	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
	}