[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 binject_file *bf;
	struct fio_file *f;
	int i, ret, events;

one_more:
	events = 0;
	for_each_file(td, f, i) {
		bf = (struct binject_file *) (uintptr_t) f->engine_data;
		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, 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;
	struct binject_file *bf;

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

		/*
		 * don't block for min events == 0
		 */
		if (!min)
			fio_set_fd_nonblocking(bf->fd, "binject");

		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) {
			bf = (struct binject_file *) (uintptr_t) f->engine_data;

			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 = (struct binject_file *) (uintptr_t) io_u->file->engine_data;
	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 = (struct binject_file *) (uintptr_t) io_u->file->engine_data;

	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 = (struct binject_file *) (uintptr_t) f->engine_data;

	if (bf) {
		binject_unmap_dev(td, bf);
		free(bf);
		f->engine_data = 0;
		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;
	f->engine_data = (uintptr_t) 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	{
	65	struct binject_file *bf;
	66	struct fio_file *f;
	67	int i, ret, events;
	68
	69	one_more:
	70	events = 0;
	71	for_each_file(td, f, i) {
47f07ddc	72	bf = (struct binject_file *) (uintptr_t) f->engine_data;
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 JA	93	static int fio_binject_getevents(struct thread_data *td, unsigned int min,
	94	unsigned int max, struct timespec fio_unused *t)
	95	{
	96	struct binject_data *bd = td->io_ops->data;
	97	int left = max, ret, r = 0, ev_index = 0;
	98	void *buf = bd->cmds;
	99	unsigned int i, events;
	100	struct fio_file *f;
0e238572	101	struct binject_file *bf;
79a43187 JA	102
	103	/*
	104	* Fill in the file descriptors
	105	*/
	106	for_each_file(td, f, i) {
47f07ddc	107	bf = (struct binject_file *) (uintptr_t) f->engine_data;
0e238572	108
79a43187 JA	109	/*
	110	* don't block for min events == 0
	111	*/
4a851614 JA	112	if (!min)
	113	fio_set_fd_nonblocking(bf->fd, "binject");
	114
0e238572	115	bd->pfds[i].fd = bf->fd;
79a43187 JA	116	bd->pfds[i].events = POLLIN;
	117	}
	118
	119	while (left) {
d01c404b	120	while (!min) {
79a43187 JA	121	ret = poll(bd->pfds, td->o.nr_files, -1);
	122	if (ret < 0) {
	123	if (!r)
	124	r = -errno;
	125	td_verror(td, errno, "poll");
	126	break;
	127	} else if (!ret)
	128	continue;
	129
	130	if (pollin_events(bd->pfds, td->o.nr_files))
	131	break;
d01c404b	132	}
79a43187 JA	133
	134	if (r < 0)
	135	break;
	136
d01c404b	137	events = binject_read_commands(td, buf, left, &r);
79a43187 JA	138
	139	if (r < 0)
	140	break;
79a43187 JA	141
	142	left -= events;
	143	r += events;
	144
	145	for (i = 0; i < events; i++) {
	146	struct b_user_cmd buc = (struct b_user_cmd ) buf + i;
	147
2f68124f	148	bd->events[ev_index] = (struct io_u *) (unsigned long) buc->usr_ptr;
79a43187 JA	149	ev_index++;
	150	}
	151	}
	152
	153	if (!min) {
0e238572	154	for_each_file(td, f, i) {
47f07ddc	155	bf = (struct binject_file *) (uintptr_t) f->engine_data;
45550d71 JA	156
	157	if (fcntl(bf->fd, F_SETFL, bd->fd_flags[i]) < 0)
	158	log_err("fio: binject failed to restore fcntl flags: %s\n", strerror(errno));
0e238572	159	}
79a43187 JA	160	}
	161
	162	if (r > 0)
	163	assert(ev_index == r);
	164
	165	return r;
	166	}
	167
	168	static int fio_binject_doio(struct thread_data td, struct io_u io_u)
	169	{
	170	struct b_user_cmd *buc = &io_u->buc;
47f07ddc	171	struct binject_file bf = (struct binject_file ) (uintptr_t) io_u->file->engine_data;
79a43187 JA	172	int ret;
79a43187 JA	173
0e238572	174	ret = write(bf->fd, buc, sizeof(*buc));
79a43187 JA	175	if (ret < 0)
	176	return ret;
	177
	178	return FIO_Q_QUEUED;
	179	}
	180
	181	static int fio_binject_prep(struct thread_data td, struct io_u io_u)
	182	{
	183	struct binject_data *bd = td->io_ops->data;
	184	struct b_user_cmd *buc = &io_u->buc;
47f07ddc	185	struct binject_file bf = (struct binject_file ) (uintptr_t) io_u->file->engine_data;
79a43187	186
0e238572	187	if (io_u->xfer_buflen & (bf->bs - 1)) {
79a43187 JA	188	log_err("read/write not sector aligned\n");
	189	return EINVAL;
	190	}
	191
	192	if (io_u->ddir == DDIR_READ) {
	193	binject_buc_init(bd, io_u);
	194	buc->type = B_TYPE_READ;
	195	} else if (io_u->ddir == DDIR_WRITE) {
	196	binject_buc_init(bd, io_u);
1ef2b6be JA	197	if (io_u->flags & IO_U_F_BARRIER)
	198	buc->type = B_TYPE_WRITEBARRIER;
	199	else
	200	buc->type = B_TYPE_WRITE;
79a43187 JA	201	} else if (io_u->ddir == DDIR_TRIM) {
	202	binject_buc_init(bd, io_u);
	203	buc->type = B_TYPE_DISCARD;
	204	} else {
	205	assert(0);
	206	}
	207
	208	return 0;
	209	}
	210
	211	static int fio_binject_queue(struct thread_data td, struct io_u io_u)
	212	{
	213	int ret;
	214
	215	fio_ro_check(td, io_u);
	216
	217	ret = fio_binject_doio(td, io_u);
	218
	219	if (ret < 0)
	220	io_u->error = errno;
	221
	222	if (io_u->error) {
	223	td_verror(td, io_u->error, "xfer");
	224	return FIO_Q_COMPLETED;
	225	}
	226
	227	return ret;
	228	}
	229
	230	static struct io_u fio_binject_event(struct thread_data td, int event)
	231	{
	232	struct binject_data *bd = td->io_ops->data;
	233
	234	return bd->events[event];
	235	}
	236
ce4b5050 JA	237	static int binject_open_ctl(struct thread_data *td)
	238	{
	239	int fd;
	240
	241	fd = open("/dev/binject-ctl", O_RDWR);
	242	if (fd < 0)
	243	td_verror(td, errno, "open binject-ctl");
	244
	245	return fd;
	246	}
	247
0e238572 JA	248	static void binject_unmap_dev(struct thread_data td, struct binject_file bf)
	249	{
	250	struct b_ioctl_cmd bic;
	251	int fdb;
	252
	253	if (bf->fd >= 0) {
	254	close(bf->fd);
	255	bf->fd = -1;
	256	}
	257
ce4b5050 JA	258	fdb = binject_open_ctl(td);
ce4b5050 JA	259	if (fdb < 0)
0e238572	260	return;
0e238572 JA	261
	262	bic.minor = bf->minor;
	263
f0f346d8	264	if (ioctl(fdb, B_IOCTL_DEL, &bic) < 0)
0e238572	265	td_verror(td, errno, "binject dev unmap");
0e238572 JA	266
	267	close(fdb);
	268	}
	269
	270	static int binject_map_dev(struct thread_data td, struct binject_file bf,
	271	int fd)
	272	{
	273	struct b_ioctl_cmd bic;
	274	char name[80];
	275	struct stat sb;
	276	int fdb, dev_there, loops;
	277
ce4b5050 JA	278	fdb = binject_open_ctl(td);
ce4b5050 JA	279	if (fdb < 0)
0e238572	280	return 1;
0e238572 JA	281
	282	bic.fd = fd;
	283
f0f346d8	284	if (ioctl(fdb, B_IOCTL_ADD, &bic) < 0) {
0e238572 JA	285	td_verror(td, errno, "binject dev map");
	286	close(fdb);
	287	return 1;
	288	}
	289
	290	bf->minor = bic.minor;
	291
	292	sprintf(name, "/dev/binject%u", bf->minor);
	293
	294	/*
	295	* Wait for udev to create the node...
	296	*/
	297	dev_there = loops = 0;
	298	do {
	299	if (!stat(name, &sb)) {
	300	dev_there = 1;
	301	break;
	302	}
	303
	304	usleep(10000);
	305	} while (++loops < 100);
	306
	307	close(fdb);
	308
	309	if (!dev_there) {
	310	log_err("fio: timed out waiting for binject dev\n");
	311	goto err_unmap;
	312	}
	313
	314	bf->fd = open(name, O_RDWR);
	315	if (bf->fd < 0) {
	316	td_verror(td, errno, "binject dev open");
	317	err_unmap:
	318	binject_unmap_dev(td, bf);
	319	return 1;
	320	}
	321
	322	return 0;
	323	}
	324
	325	static int fio_binject_close_file(struct thread_data td, struct fio_file f)
	326	{
47f07ddc	327	struct binject_file bf = (struct binject_file ) (uintptr_t) f->engine_data;
0e238572 JA	328
	329	if (bf) {
	330	binject_unmap_dev(td, bf);
	331	free(bf);
84b3842c	332	f->engine_data = 0;
0e238572 JA	333	return generic_close_file(td, f);
	334	}
	335
	336	return 0;
	337	}
	338
4a435dac JA	339	static int fio_binject_open_file(struct thread_data td, struct fio_file f)
4a435dac JA	340	{
0e238572	341	struct binject_file *bf;
4a435dac JA	342	unsigned int bs;
	343	int ret;
	344
	345	ret = generic_open_file(td, f);
	346	if (ret)
	347	return 1;
	348
	349	if (f->filetype != FIO_TYPE_BD) {
	350	log_err("fio: binject only works with block devices\n");
0e238572	351	goto err_close;
4a435dac JA	352	}
	353	if (ioctl(f->fd, BLKSSZGET, &bs) < 0) {
	354	td_verror(td, errno, "BLKSSZGET");
0e238572 JA	355	goto err_close;
	356	}
	357
	358	bf = malloc(sizeof(*bf));
	359	bf->bs = bs;
	360	bf->minor = bf->fd = -1;
9cbef504	361	f->engine_data = (uintptr_t) bf;
0e238572 JA	362
	363	if (binject_map_dev(td, bf, f->fd)) {
	364	err_close:
	365	ret = generic_close_file(td, f);
4a435dac JA	366	return 1;
	367	}
	368
4a435dac JA	369	return 0;
	370	}
	371
79a43187 JA	372	static void fio_binject_cleanup(struct thread_data *td)
	373	{
	374	struct binject_data *bd = td->io_ops->data;
	375
	376	if (bd) {
	377	free(bd->events);
	378	free(bd->cmds);
	379	free(bd->fd_flags);
	380	free(bd->pfds);
	381	free(bd);
	382	}
	383	}
	384
	385	static int fio_binject_init(struct thread_data *td)
	386	{
	387	struct binject_data *bd;
	388
	389	bd = malloc(sizeof(*bd));
	390	memset(bd, 0, sizeof(*bd));
	391
	392	bd->cmds = malloc(td->o.iodepth * sizeof(struct b_user_cmd));
	393	memset(bd->cmds, 0, td->o.iodepth * sizeof(struct b_user_cmd));
	394
	395	bd->events = malloc(td->o.iodepth * sizeof(struct io_u *));
	396	memset(bd->events, 0, td->o.iodepth * sizeof(struct io_u *));
	397
	398	bd->pfds = malloc(sizeof(struct pollfd) * td->o.nr_files);
	399	memset(bd->pfds, 0, sizeof(struct pollfd) * td->o.nr_files);
	400
	401	bd->fd_flags = malloc(sizeof(int) * td->o.nr_files);
	402	memset(bd->fd_flags, 0, sizeof(int) * td->o.nr_files);
	403
	404	td->io_ops->data = bd;
	405	return 0;
	406	}
	407
	408	static struct ioengine_ops ioengine = {
	409	.name = "binject",
	410	.version = FIO_IOOPS_VERSION,
	411	.init = fio_binject_init,
	412	.prep = fio_binject_prep,
	413	.queue = fio_binject_queue,
	414	.getevents = fio_binject_getevents,
	415	.event = fio_binject_event,
	416	.cleanup = fio_binject_cleanup,
4a435dac	417	.open_file = fio_binject_open_file,
0e238572	418	.close_file = fio_binject_close_file,
79a43187	419	.get_file_size = generic_get_file_size,
ca7e0ddb	420	.flags = FIO_RAWIO \| FIO_BARRIER \| FIO_MEMALIGN,
79a43187 JA	421	};
	422
	423	#else /* FIO_HAVE_BINJECT */
	424
	425	/*
	426	* When we have a proper configure system in place, we simply wont build
	427	* and install this io engine. For now install a crippled version that
	428	* just complains and fails to load.
	429	*/
	430	static int fio_binject_init(struct thread_data fio_unused *td)
	431	{
a3edaf76	432	log_err("fio: ioengine binject not available\n");
79a43187 JA	433	return 1;
	434	}
	435
	436	static struct ioengine_ops ioengine = {
	437	.name = "binject",
	438	.version = FIO_IOOPS_VERSION,
	439	.init = fio_binject_init,
	440	};
	441
	442	#endif
	443
	444	static void fio_init fio_binject_register(void)
	445	{
	446	register_ioengine(&ioengine);
	447	}
	448
	449	static void fio_exit fio_binject_unregister(void)
	450	{
	451	unregister_ioengine(&ioengine);
	452	}