[fio.git] / engines / binject.c

/*
 * binject engine
 *
 * IO engine that uses the Linux binject interface to directly inject
 * bio's to block devices.
 *
 */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <assert.h>
#include <string.h>
#include <sys/poll.h>
#include <sys/types.h>
#include <sys/stat.h>

#include "../fio.h"

#ifdef FIO_HAVE_BINJECT

struct binject_data {
	struct b_user_cmd *cmds;
	struct io_u **events;
	struct pollfd *pfds;
	int *fd_flags;
};

struct binject_file {
	unsigned int bs;
	int minor;
	int fd;
};

static void binject_buc_init(struct binject_data *bd, struct io_u *io_u)
{
	struct b_user_cmd *buc = &io_u->buc;

	memset(buc, 0, sizeof(*buc));
	binject_buc_set_magic(buc);

	buc->buf = (unsigned long) io_u->xfer_buf;
	buc->len = io_u->xfer_buflen;
	buc->offset = io_u->offset;
	buc->usr_ptr = (unsigned long) io_u;

	buc->flags = B_FLAG_NOIDLE | B_FLAG_UNPLUG;
	assert(buc->buf);
}

static int pollin_events(struct pollfd *pfds, int fds)
{
	int i;

	for (i = 0; i < fds; i++)
		if (pfds[i].revents & POLLIN)
			return 1;

	return 0;
}

static unsigned int binject_read_commands(struct thread_data *td, void *p,
					  int left, int *err)
{
	struct fio_file *f;
	int i, ret, events;

one_more:
	events = 0;
	for_each_file(td, f, i) {
		struct binject_file *bf = FILE_ENG_DATA(f);

		ret = read(bf->fd, p, left * sizeof(struct b_user_cmd));
		if (ret < 0) {
			if (errno == EAGAIN)
				continue;
			*err = -errno;
			td_verror(td, errno, "read");
			break;
		} else if (ret) {
			p += ret;
			events += ret / sizeof(struct b_user_cmd);
		}
	}

	if (*err || events)
		return events;

	usleep(1000);
	goto one_more;
}

static int fio_binject_getevents(struct thread_data *td, unsigned int min,
				 unsigned int max,
				 const struct timespec fio_unused *t)
{
	struct binject_data *bd = td->io_ops_data;
	int left = max, ret, r = 0, ev_index = 0;
	void *buf = bd->cmds;
	unsigned int i, events;
	struct fio_file *f;

	/*
	 * Fill in the file descriptors
	 */
	for_each_file(td, f, i) {
		struct binject_file *bf = FILE_ENG_DATA(f);

		/*
		 * don't block for min events == 0
		 */
		if (!min)
			bd->fd_flags[i] = fio_set_fd_nonblocking(bf->fd, "binject");
		else
			bd->fd_flags[i] = -1;

		bd->pfds[i].fd = bf->fd;
		bd->pfds[i].events = POLLIN;
	}

	while (left) {
		while (!min) {
			ret = poll(bd->pfds, td->o.nr_files, -1);
			if (ret < 0) {
				if (!r)
					r = -errno;
				td_verror(td, errno, "poll");
				break;
			} else if (!ret)
				continue;

			if (pollin_events(bd->pfds, td->o.nr_files))
				break;
		}

		if (r < 0)
			break;

		events = binject_read_commands(td, buf, left, &r);

		if (r < 0)
			break;

		left -= events;
		r += events;

		for (i = 0; i < events; i++) {
			struct b_user_cmd *buc = (struct b_user_cmd *) buf + i;

			bd->events[ev_index] = (struct io_u *) (unsigned long) buc->usr_ptr;
			ev_index++;
		}
	}

	if (!min) {
		for_each_file(td, f, i) {
			struct binject_file *bf = FILE_ENG_DATA(f);

			if (bd->fd_flags[i] == -1)
				continue;

			if (fcntl(bf->fd, F_SETFL, bd->fd_flags[i]) < 0)
				log_err("fio: binject failed to restore fcntl flags: %s\n", strerror(errno));
		}
	}

	if (r > 0)
		assert(ev_index == r);

	return r;
}

static int fio_binject_doio(struct thread_data *td, struct io_u *io_u)
{
	struct b_user_cmd *buc = &io_u->buc;
	struct binject_file *bf = FILE_ENG_DATA(io_u->file);
	int ret;

	ret = write(bf->fd, buc, sizeof(*buc));
	if (ret < 0)
		return ret;

	return FIO_Q_QUEUED;
}

static int fio_binject_prep(struct thread_data *td, struct io_u *io_u)
{
	struct binject_data *bd = td->io_ops_data;
	struct b_user_cmd *buc = &io_u->buc;
	struct binject_file *bf = FILE_ENG_DATA(io_u->file);

	if (io_u->xfer_buflen & (bf->bs - 1)) {
		log_err("read/write not sector aligned\n");
		return EINVAL;
	}

	if (io_u->ddir == DDIR_READ) {
		binject_buc_init(bd, io_u);
		buc->type = B_TYPE_READ;
	} else if (io_u->ddir == DDIR_WRITE) {
		binject_buc_init(bd, io_u);
		if (io_u->flags & IO_U_F_BARRIER)
			buc->type = B_TYPE_WRITEBARRIER;
		else
			buc->type = B_TYPE_WRITE;
	} else if (io_u->ddir == DDIR_TRIM) {
		binject_buc_init(bd, io_u);
		buc->type = B_TYPE_DISCARD;
	} else {
		assert(0);
	}

	return 0;
}

static int fio_binject_queue(struct thread_data *td, struct io_u *io_u)
{
	int ret;

	fio_ro_check(td, io_u);

	ret = fio_binject_doio(td, io_u);

	if (ret < 0)
		io_u->error = errno;

	if (io_u->error) {
		td_verror(td, io_u->error, "xfer");
		return FIO_Q_COMPLETED;
	}

	return ret;
}

static struct io_u *fio_binject_event(struct thread_data *td, int event)
{
	struct binject_data *bd = td->io_ops_data;

	return bd->events[event];
}

static int binject_open_ctl(struct thread_data *td)
{
	int fd;

	fd = open("/dev/binject-ctl", O_RDWR);
	if (fd < 0)
		td_verror(td, errno, "open binject-ctl");

	return fd;
}

static void binject_unmap_dev(struct thread_data *td, struct binject_file *bf)
{
	struct b_ioctl_cmd bic;
	int fdb;

	if (bf->fd >= 0) {
		close(bf->fd);
		bf->fd = -1;
	}

	fdb = binject_open_ctl(td);
	if (fdb < 0)
		return;

	bic.minor = bf->minor;

	if (ioctl(fdb, B_IOCTL_DEL, &bic) < 0)
		td_verror(td, errno, "binject dev unmap");

	close(fdb);
}

static int binject_map_dev(struct thread_data *td, struct binject_file *bf,
			   int fd)
{
	struct b_ioctl_cmd bic;
	char name[80];
	struct stat sb;
	int fdb, dev_there, loops;

	fdb = binject_open_ctl(td);
	if (fdb < 0)
		return 1;

	bic.fd = fd;

	if (ioctl(fdb, B_IOCTL_ADD, &bic) < 0) {
		td_verror(td, errno, "binject dev map");
		close(fdb);
		return 1;
	}

	bf->minor = bic.minor;

	sprintf(name, "/dev/binject%u", bf->minor);

	/*
	 * Wait for udev to create the node...
	 */
	dev_there = loops = 0;
	do {
		if (!stat(name, &sb)) {
			dev_there = 1;
			break;
		}

		usleep(10000);
	} while (++loops < 100);

	close(fdb);

	if (!dev_there) {
		log_err("fio: timed out waiting for binject dev\n");
		goto err_unmap;
	}

	bf->fd = open(name, O_RDWR);
	if (bf->fd < 0) {
		td_verror(td, errno, "binject dev open");
err_unmap:
		binject_unmap_dev(td, bf);
		return 1;
	}

	return 0;
}

static int fio_binject_close_file(struct thread_data *td, struct fio_file *f)
{
	struct binject_file *bf = FILE_ENG_DATA(f);

	if (bf) {
		binject_unmap_dev(td, bf);
		free(bf);
		FILE_SET_ENG_DATA(f, NULL);
		return generic_close_file(td, f);
	}

	return 0;
}

static int fio_binject_open_file(struct thread_data *td, struct fio_file *f)
{
	struct binject_file *bf;
	unsigned int bs;
	int ret;

	ret = generic_open_file(td, f);
	if (ret)
		return 1;

	if (f->filetype != FIO_TYPE_BD) {
		log_err("fio: binject only works with block devices\n");
		goto err_close;
	}
	if (ioctl(f->fd, BLKSSZGET, &bs) < 0) {
		td_verror(td, errno, "BLKSSZGET");
		goto err_close;
	}

	bf = malloc(sizeof(*bf));
	bf->bs = bs;
	bf->minor = bf->fd = -1;
	FILE_SET_ENG_DATA(f, bf);

	if (binject_map_dev(td, bf, f->fd)) {
err_close:
		ret = generic_close_file(td, f);
		return 1;
	}

	return 0;
}

static void fio_binject_cleanup(struct thread_data *td)
{
	struct binject_data *bd = td->io_ops_data;

	if (bd) {
		free(bd->events);
		free(bd->cmds);
		free(bd->fd_flags);
		free(bd->pfds);
		free(bd);
	}
}

static int fio_binject_init(struct thread_data *td)
{
	struct binject_data *bd;

	bd = malloc(sizeof(*bd));
	memset(bd, 0, sizeof(*bd));

	bd->cmds = malloc(td->o.iodepth * sizeof(struct b_user_cmd));
	memset(bd->cmds, 0, td->o.iodepth * sizeof(struct b_user_cmd));

	bd->events = malloc(td->o.iodepth * sizeof(struct io_u *));
	memset(bd->events, 0, td->o.iodepth * sizeof(struct io_u *));

	bd->pfds = malloc(sizeof(struct pollfd) * td->o.nr_files);
	memset(bd->pfds, 0, sizeof(struct pollfd) * td->o.nr_files);

	bd->fd_flags = malloc(sizeof(int) * td->o.nr_files);
	memset(bd->fd_flags, 0, sizeof(int) * td->o.nr_files);

	td->io_ops_data = bd;
	return 0;
}

static struct ioengine_ops ioengine = {
	.name		= "binject",
	.version	= FIO_IOOPS_VERSION,
	.init		= fio_binject_init,
	.prep		= fio_binject_prep,
	.queue		= fio_binject_queue,
	.getevents	= fio_binject_getevents,
	.event		= fio_binject_event,
	.cleanup	= fio_binject_cleanup,
	.open_file	= fio_binject_open_file,
	.close_file	= fio_binject_close_file,
	.get_file_size	= generic_get_file_size,
	.flags		= FIO_RAWIO | FIO_BARRIER | FIO_MEMALIGN,
};

#else /* FIO_HAVE_BINJECT */

/*
 * When we have a proper configure system in place, we simply wont build
 * and install this io engine. For now install a crippled version that
 * just complains and fails to load.
 */
static int fio_binject_init(struct thread_data fio_unused *td)
{
	log_err("fio: ioengine binject not available\n");
	return 1;
}

static struct ioengine_ops ioengine = {
	.name		= "binject",
	.version	= FIO_IOOPS_VERSION,
	.init		= fio_binject_init,
};

#endif

static void fio_init fio_binject_register(void)
{
	register_ioengine(&ioengine);
}

static void fio_exit fio_binject_unregister(void)
{
	unregister_ioengine(&ioengine);
}
Commit	Line	Data
79a43187 JA	1	/*
	2	* binject engine
	3	*
	4	* IO engine that uses the Linux binject interface to directly inject
	5	* bio's to block devices.
	6	*
	7	*/
	8	#include <stdio.h>
	9	#include <stdlib.h>
	10	#include <unistd.h>
	11	#include <errno.h>
	12	#include <assert.h>
	13	#include <string.h>
	14	#include <sys/poll.h>
83c107b7 JA	15	#include <sys/types.h>
83c107b7 JA	16	#include <sys/stat.h>
79a43187 JA	17
	18	#include "../fio.h"
	19
	20	#ifdef FIO_HAVE_BINJECT
	21
	22	struct binject_data {
	23	struct b_user_cmd *cmds;
	24	struct io_u **events;
	25	struct pollfd *pfds;
	26	int *fd_flags;
79a43187 JA	27	};
79a43187 JA	28
0e238572 JA	29	struct binject_file {
	30	unsigned int bs;
	31	int minor;
	32	int fd;
	33	};
	34
79a43187 JA	35	static void binject_buc_init(struct binject_data bd, struct io_u io_u)
	36	{
	37	struct b_user_cmd *buc = &io_u->buc;
	38
	39	memset(buc, 0, sizeof(*buc));
	40	binject_buc_set_magic(buc);
	41
	42	buc->buf = (unsigned long) io_u->xfer_buf;
	43	buc->len = io_u->xfer_buflen;
	44	buc->offset = io_u->offset;
	45	buc->usr_ptr = (unsigned long) io_u;
	46
	47	buc->flags = B_FLAG_NOIDLE \| B_FLAG_UNPLUG;
	48	assert(buc->buf);
	49	}
	50
	51	static int pollin_events(struct pollfd *pfds, int fds)
	52	{
	53	int i;
	54
	55	for (i = 0; i < fds; i++)
	56	if (pfds[i].revents & POLLIN)
	57	return 1;
	58
	59	return 0;
	60	}
	61
d01c404b JA	62	static unsigned int binject_read_commands(struct thread_data td, void p,
	63	int left, int *err)
	64	{
d01c404b JA	65	struct fio_file *f;
	66	int i, ret, events;
	67
	68	one_more:
	69	events = 0;
	70	for_each_file(td, f, i) {
e19ccb55 JA	71	struct binject_file *bf = FILE_ENG_DATA(f);
e19ccb55 JA	72
d01c404b JA	73	ret = read(bf->fd, p, left * sizeof(struct b_user_cmd));
	74	if (ret < 0) {
	75	if (errno == EAGAIN)
	76	continue;
	77	*err = -errno;
	78	td_verror(td, errno, "read");
	79	break;
	80	} else if (ret) {
	81	p += ret;
	82	events += ret / sizeof(struct b_user_cmd);
	83	}
	84	}
	85
	86	if (*err \|\| events)
	87	return events;
	88
	89	usleep(1000);
	90	goto one_more;
	91	}
	92
79a43187	93	static int fio_binject_getevents(struct thread_data *td, unsigned int min,
1f440ece JA	94	unsigned int max,
1f440ece JA	95	const struct timespec fio_unused *t)
79a43187	96	{
565e784d	97	struct binject_data *bd = td->io_ops_data;
79a43187 JA	98	int left = max, ret, r = 0, ev_index = 0;
	99	void *buf = bd->cmds;
	100	unsigned int i, events;
	101	struct fio_file *f;
	102
	103	/*
	104	* Fill in the file descriptors
	105	*/
	106	for_each_file(td, f, i) {
e19ccb55	107	struct binject_file *bf = FILE_ENG_DATA(f);
0e238572	108
79a43187 JA	109	/*
	110	* don't block for min events == 0
	111	*/
4a851614	112	if (!min)
3a35845f JA	113	bd->fd_flags[i] = fio_set_fd_nonblocking(bf->fd, "binject");
	114	else
	115	bd->fd_flags[i] = -1;
4a851614	116
0e238572	117	bd->pfds[i].fd = bf->fd;
79a43187 JA	118	bd->pfds[i].events = POLLIN;
	119	}
	120
	121	while (left) {
d01c404b	122	while (!min) {
79a43187 JA	123	ret = poll(bd->pfds, td->o.nr_files, -1);
	124	if (ret < 0) {
	125	if (!r)
	126	r = -errno;
	127	td_verror(td, errno, "poll");
	128	break;
	129	} else if (!ret)
	130	continue;
	131
	132	if (pollin_events(bd->pfds, td->o.nr_files))
	133	break;
d01c404b	134	}
79a43187 JA	135
	136	if (r < 0)
	137	break;
	138
d01c404b	139	events = binject_read_commands(td, buf, left, &r);
79a43187 JA	140
	141	if (r < 0)
	142	break;
79a43187 JA	143
	144	left -= events;
	145	r += events;
	146
	147	for (i = 0; i < events; i++) {
	148	struct b_user_cmd buc = (struct b_user_cmd ) buf + i;
	149
2f68124f	150	bd->events[ev_index] = (struct io_u *) (unsigned long) buc->usr_ptr;
79a43187 JA	151	ev_index++;
	152	}
	153	}
	154
	155	if (!min) {
0e238572	156	for_each_file(td, f, i) {
e19ccb55	157	struct binject_file *bf = FILE_ENG_DATA(f);
45550d71	158
3a35845f JA	159	if (bd->fd_flags[i] == -1)
	160	continue;
	161
45550d71 JA	162	if (fcntl(bf->fd, F_SETFL, bd->fd_flags[i]) < 0)
45550d71 JA	163	log_err("fio: binject failed to restore fcntl flags: %s\n", strerror(errno));
0e238572	164	}
79a43187 JA	165	}
	166
	167	if (r > 0)
	168	assert(ev_index == r);
	169
	170	return r;
	171	}
	172
	173	static int fio_binject_doio(struct thread_data td, struct io_u io_u)
	174	{
	175	struct b_user_cmd *buc = &io_u->buc;
e19ccb55	176	struct binject_file *bf = FILE_ENG_DATA(io_u->file);
79a43187 JA	177	int ret;
79a43187 JA	178
0e238572	179	ret = write(bf->fd, buc, sizeof(*buc));
79a43187 JA	180	if (ret < 0)
	181	return ret;
	182
	183	return FIO_Q_QUEUED;
	184	}
	185
	186	static int fio_binject_prep(struct thread_data td, struct io_u io_u)
	187	{
565e784d	188	struct binject_data *bd = td->io_ops_data;
79a43187	189	struct b_user_cmd *buc = &io_u->buc;
e19ccb55	190	struct binject_file *bf = FILE_ENG_DATA(io_u->file);
79a43187	191
0e238572	192	if (io_u->xfer_buflen & (bf->bs - 1)) {
79a43187 JA	193	log_err("read/write not sector aligned\n");
	194	return EINVAL;
	195	}
	196
	197	if (io_u->ddir == DDIR_READ) {
	198	binject_buc_init(bd, io_u);
	199	buc->type = B_TYPE_READ;
	200	} else if (io_u->ddir == DDIR_WRITE) {
	201	binject_buc_init(bd, io_u);
1ef2b6be JA	202	if (io_u->flags & IO_U_F_BARRIER)
	203	buc->type = B_TYPE_WRITEBARRIER;
	204	else
	205	buc->type = B_TYPE_WRITE;
79a43187 JA	206	} else if (io_u->ddir == DDIR_TRIM) {
	207	binject_buc_init(bd, io_u);
	208	buc->type = B_TYPE_DISCARD;
	209	} else {
	210	assert(0);
	211	}
	212
	213	return 0;
	214	}
	215
	216	static int fio_binject_queue(struct thread_data td, struct io_u io_u)
	217	{
	218	int ret;
	219
	220	fio_ro_check(td, io_u);
	221
	222	ret = fio_binject_doio(td, io_u);
	223
	224	if (ret < 0)
	225	io_u->error = errno;
	226
	227	if (io_u->error) {
	228	td_verror(td, io_u->error, "xfer");
	229	return FIO_Q_COMPLETED;
	230	}
	231
	232	return ret;
	233	}
	234
	235	static struct io_u fio_binject_event(struct thread_data td, int event)
	236	{
565e784d	237	struct binject_data *bd = td->io_ops_data;
79a43187 JA	238
	239	return bd->events[event];
	240	}
	241
ce4b5050 JA	242	static int binject_open_ctl(struct thread_data *td)
	243	{
	244	int fd;
	245
	246	fd = open("/dev/binject-ctl", O_RDWR);
	247	if (fd < 0)
	248	td_verror(td, errno, "open binject-ctl");
	249
	250	return fd;
	251	}
	252
0e238572 JA	253	static void binject_unmap_dev(struct thread_data td, struct binject_file bf)
	254	{
	255	struct b_ioctl_cmd bic;
	256	int fdb;
	257
	258	if (bf->fd >= 0) {
	259	close(bf->fd);
	260	bf->fd = -1;
	261	}
	262
ce4b5050 JA	263	fdb = binject_open_ctl(td);
ce4b5050 JA	264	if (fdb < 0)
0e238572	265	return;
0e238572 JA	266
	267	bic.minor = bf->minor;
	268
f0f346d8	269	if (ioctl(fdb, B_IOCTL_DEL, &bic) < 0)
0e238572	270	td_verror(td, errno, "binject dev unmap");
0e238572 JA	271
	272	close(fdb);
	273	}
	274
	275	static int binject_map_dev(struct thread_data td, struct binject_file bf,
	276	int fd)
	277	{
	278	struct b_ioctl_cmd bic;
	279	char name[80];
	280	struct stat sb;
	281	int fdb, dev_there, loops;
	282
ce4b5050 JA	283	fdb = binject_open_ctl(td);
ce4b5050 JA	284	if (fdb < 0)
0e238572	285	return 1;
0e238572 JA	286
	287	bic.fd = fd;
	288
f0f346d8	289	if (ioctl(fdb, B_IOCTL_ADD, &bic) < 0) {
0e238572 JA	290	td_verror(td, errno, "binject dev map");
	291	close(fdb);
	292	return 1;
	293	}
	294
	295	bf->minor = bic.minor;
	296
	297	sprintf(name, "/dev/binject%u", bf->minor);
	298
	299	/*
	300	* Wait for udev to create the node...
	301	*/
	302	dev_there = loops = 0;
	303	do {
	304	if (!stat(name, &sb)) {
	305	dev_there = 1;
	306	break;
	307	}
	308
	309	usleep(10000);
	310	} while (++loops < 100);
	311
	312	close(fdb);
	313
	314	if (!dev_there) {
	315	log_err("fio: timed out waiting for binject dev\n");
	316	goto err_unmap;
	317	}
	318
	319	bf->fd = open(name, O_RDWR);
	320	if (bf->fd < 0) {
	321	td_verror(td, errno, "binject dev open");
	322	err_unmap:
	323	binject_unmap_dev(td, bf);
	324	return 1;
	325	}
	326
	327	return 0;
	328	}
	329
	330	static int fio_binject_close_file(struct thread_data td, struct fio_file f)
	331	{
e19ccb55	332	struct binject_file *bf = FILE_ENG_DATA(f);
0e238572 JA	333
	334	if (bf) {
	335	binject_unmap_dev(td, bf);
	336	free(bf);
e19ccb55	337	FILE_SET_ENG_DATA(f, NULL);
0e238572 JA	338	return generic_close_file(td, f);
	339	}
	340
	341	return 0;
	342	}
	343
4a435dac JA	344	static int fio_binject_open_file(struct thread_data td, struct fio_file f)
4a435dac JA	345	{
0e238572	346	struct binject_file *bf;
4a435dac JA	347	unsigned int bs;
	348	int ret;
	349
	350	ret = generic_open_file(td, f);
	351	if (ret)
	352	return 1;
	353
	354	if (f->filetype != FIO_TYPE_BD) {
	355	log_err("fio: binject only works with block devices\n");
0e238572	356	goto err_close;
4a435dac JA	357	}
	358	if (ioctl(f->fd, BLKSSZGET, &bs) < 0) {
	359	td_verror(td, errno, "BLKSSZGET");
0e238572 JA	360	goto err_close;
	361	}
	362
	363	bf = malloc(sizeof(*bf));
	364	bf->bs = bs;
	365	bf->minor = bf->fd = -1;
e19ccb55	366	FILE_SET_ENG_DATA(f, bf);
0e238572 JA	367
	368	if (binject_map_dev(td, bf, f->fd)) {
	369	err_close:
	370	ret = generic_close_file(td, f);
4a435dac JA	371	return 1;
	372	}
	373
4a435dac JA	374	return 0;
	375	}
	376
79a43187 JA	377	static void fio_binject_cleanup(struct thread_data *td)
79a43187 JA	378	{
565e784d	379	struct binject_data *bd = td->io_ops_data;
79a43187 JA	380
	381	if (bd) {
	382	free(bd->events);
	383	free(bd->cmds);
	384	free(bd->fd_flags);
	385	free(bd->pfds);
	386	free(bd);
	387	}
	388	}
	389
	390	static int fio_binject_init(struct thread_data *td)
	391	{
	392	struct binject_data *bd;
	393
	394	bd = malloc(sizeof(*bd));
	395	memset(bd, 0, sizeof(*bd));
	396
	397	bd->cmds = malloc(td->o.iodepth * sizeof(struct b_user_cmd));
	398	memset(bd->cmds, 0, td->o.iodepth * sizeof(struct b_user_cmd));
	399
	400	bd->events = malloc(td->o.iodepth * sizeof(struct io_u *));
	401	memset(bd->events, 0, td->o.iodepth * sizeof(struct io_u *));
	402
	403	bd->pfds = malloc(sizeof(struct pollfd) * td->o.nr_files);
	404	memset(bd->pfds, 0, sizeof(struct pollfd) * td->o.nr_files);
	405
	406	bd->fd_flags = malloc(sizeof(int) * td->o.nr_files);
	407	memset(bd->fd_flags, 0, sizeof(int) * td->o.nr_files);
	408
565e784d	409	td->io_ops_data = bd;
79a43187 JA	410	return 0;
	411	}
	412
	413	static struct ioengine_ops ioengine = {
	414	.name = "binject",
	415	.version = FIO_IOOPS_VERSION,
	416	.init = fio_binject_init,
	417	.prep = fio_binject_prep,
	418	.queue = fio_binject_queue,
	419	.getevents = fio_binject_getevents,
	420	.event = fio_binject_event,
	421	.cleanup = fio_binject_cleanup,
4a435dac	422	.open_file = fio_binject_open_file,
0e238572	423	.close_file = fio_binject_close_file,
79a43187	424	.get_file_size = generic_get_file_size,
ca7e0ddb	425	.flags = FIO_RAWIO \| FIO_BARRIER \| FIO_MEMALIGN,
79a43187 JA	426	};
	427
	428	#else /* FIO_HAVE_BINJECT */
	429
	430	/*
	431	* When we have a proper configure system in place, we simply wont build
	432	* and install this io engine. For now install a crippled version that
	433	* just complains and fails to load.
	434	*/
	435	static int fio_binject_init(struct thread_data fio_unused *td)
	436	{
a3edaf76	437	log_err("fio: ioengine binject not available\n");
79a43187 JA	438	return 1;
	439	}
	440
	441	static struct ioengine_ops ioengine = {
	442	.name = "binject",
	443	.version = FIO_IOOPS_VERSION,
	444	.init = fio_binject_init,
	445	};
	446
	447	#endif
	448
	449	static void fio_init fio_binject_register(void)
	450	{
	451	register_ioengine(&ioengine);
	452	}
	453
	454	static void fio_exit fio_binject_unregister(void)
	455	{
	456	unregister_ioengine(&ioengine);
	457	}