[fio.git] / engines / sg.c

/*
 * scsi generic sg v3 io engine
 *
 */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <assert.h>
#include <sys/poll.h>

#include "../fio.h"
#include "../os.h"

#ifdef FIO_HAVE_SGIO

struct sgio_cmd {
	unsigned char cdb[10];
	int nr;
};

struct sgio_data {
	struct sgio_cmd *cmds;
	struct io_u **events;
	unsigned int bs;
};

static void sgio_hdr_init(struct sgio_data *sd, struct sg_io_hdr *hdr,
			  struct io_u *io_u, int fs)
{
	struct sgio_cmd *sc = &sd->cmds[io_u->index];

	memset(hdr, 0, sizeof(*hdr));
	memset(sc->cdb, 0, sizeof(sc->cdb));

	hdr->interface_id = 'S';
	hdr->cmdp = sc->cdb;
	hdr->cmd_len = sizeof(sc->cdb);
	hdr->pack_id = io_u->index;
	hdr->usr_ptr = io_u;

	if (fs) {
		hdr->dxferp = io_u->xfer_buf;
		hdr->dxfer_len = io_u->xfer_buflen;
	}
}

static int fio_sgio_ioctl_getevents(struct thread_data *td, int fio_unused min,
				    int max, struct timespec fio_unused *t)
{
	assert(max <= 1);

	/*
	 * we can only have one finished io_u for sync io, since the depth
	 * is always 1
	 */
	if (list_empty(&td->io_u_busylist))
		return 0;

	return 1;
}

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 int fio_sgio_getevents(struct thread_data *td, int min, int max,
			      struct timespec fio_unused *t)
{
	/*
	 * normally hard coding &td->files[0] is a bug that needs to be fixed,
	 * but it's ok here as all files should point to the same device.
	 */
	struct fio_file *f = &td->files[0];
	struct sgio_data *sd = td->io_ops->data;
	int left = max, ret, events, i, r = 0, *fl;
	struct pollfd *pfds;
	void *buf;

	/*
	 * Fill in the file descriptors
	 */
	pfds = malloc(sizeof(struct pollfd) * td->nr_files);
	fl = malloc(sizeof(int) * td->nr_files);

	for_each_file(td, f, i) {
		/*
		 * don't block for min events == 0
		 */
		if (!min) {
			fl[i] = fcntl(f->fd, F_GETFL);
			fcntl(f->fd, F_SETFL, fl[i] | O_NONBLOCK);
		}
		pfds[i].fd = f->fd;
		pfds[i].events = POLLIN;
	}

	buf = malloc(max * sizeof(struct sg_io_hdr));
	while (left) {
		void *p;

		do {
			if (!min)
				break;

			ret = poll(pfds, td->nr_files, -1);
			if (ret < 0) {
				td_verror(td, errno);
				if (!r)
					r = -1;
				break;
			} else if (!ret)
				continue;

			if (pollin_events(pfds, td->nr_files))
				break;
		} while (1);

		if (r < 0)
			break;

re_read:
		p = buf;
		events = 0;
		for_each_file(td, f, i) {
			ret = read(f->fd, p, left * sizeof(struct sg_io_hdr));
			if (ret < 0) {
				if (errno == EAGAIN)
					continue;
				td_verror(td, errno);
				r = -1;
				break;
			} else if (ret) {
				p += ret;
				events += ret / sizeof(struct sg_io_hdr);
			}
		}

		if (r < 0)
			break;
		if (!events) {
			usleep(1000);
			goto re_read;
		}

		left -= events;
		r += events;

		for (i = 0; i < events; i++) {
			struct sg_io_hdr *hdr = (struct sg_io_hdr *) buf + i;

			sd->events[i] = hdr->usr_ptr;
		}
	}

	if (!min) {
		for_each_file(td, f, i)
			fcntl(f->fd, F_SETFL, fl[i]);
	}

	free(buf);
	free(pfds);
	free(fl);
	return r;
}

static int fio_sgio_ioctl_doio(struct thread_data *td,
			       struct fio_file *f, struct io_u *io_u)
{
	struct sgio_data *sd = td->io_ops->data;
	struct sg_io_hdr *hdr = &io_u->hdr;

	sd->events[0] = io_u;

	return ioctl(f->fd, SG_IO, hdr);
}

static int fio_sgio_rw_doio(struct fio_file *f, struct io_u *io_u, int sync)
{
	struct sg_io_hdr *hdr = &io_u->hdr;
	int ret;

	ret = write(f->fd, hdr, sizeof(*hdr));
	if (ret < 0)
		return errno;

	if (sync) {
		ret = read(f->fd, hdr, sizeof(*hdr));
		if (ret < 0)
			return errno;
	}

	return 0;
}

static int fio_sgio_doio(struct thread_data *td, struct io_u *io_u, int sync)
{
	struct fio_file *f = io_u->file;

	if (td->filetype == FIO_TYPE_BD)
		return fio_sgio_ioctl_doio(td, f, io_u);

	return fio_sgio_rw_doio(f, io_u, sync);
}

static int fio_sgio_prep(struct thread_data *td, struct io_u *io_u)
{
	struct sg_io_hdr *hdr = &io_u->hdr;
	struct sgio_data *sd = td->io_ops->data;
	int nr_blocks, lba;

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

	if (io_u->ddir == DDIR_READ) {
		sgio_hdr_init(sd, hdr, io_u, 1);

		hdr->dxfer_direction = SG_DXFER_FROM_DEV;
		hdr->cmdp[0] = 0x28;
	} else if (io_u->ddir == DDIR_WRITE) {
		sgio_hdr_init(sd, hdr, io_u, 1);

		hdr->dxfer_direction = SG_DXFER_TO_DEV;
		hdr->cmdp[0] = 0x2a;
	} else {
		sgio_hdr_init(sd, hdr, io_u, 0);

		hdr->dxfer_direction = SG_DXFER_NONE;
		hdr->cmdp[0] = 0x35;
	}

	if (hdr->dxfer_direction != SG_DXFER_NONE) {
		nr_blocks = io_u->xfer_buflen / sd->bs;
		lba = io_u->offset / sd->bs;
		hdr->cmdp[2] = (unsigned char) ((lba >> 24) & 0xff);
		hdr->cmdp[3] = (unsigned char) ((lba >> 16) & 0xff);
		hdr->cmdp[4] = (unsigned char) ((lba >>  8) & 0xff);
		hdr->cmdp[5] = (unsigned char) (lba & 0xff);
		hdr->cmdp[7] = (unsigned char) ((nr_blocks >> 8) & 0xff);
		hdr->cmdp[8] = (unsigned char) (nr_blocks & 0xff);
	}

	return 0;
}

static int fio_sgio_queue(struct thread_data *td, struct io_u *io_u)
{
	struct sg_io_hdr *hdr = &io_u->hdr;
	int ret;

	ret = fio_sgio_doio(td, io_u, io_u->ddir == DDIR_SYNC);

	if (ret < 0)
		io_u->error = errno;
	else if (hdr->status) {
		io_u->resid = hdr->resid;
		io_u->error = EIO;
	}

	return io_u->error;
}

static struct io_u *fio_sgio_event(struct thread_data *td, int event)
{
	struct sgio_data *sd = td->io_ops->data;

	return sd->events[event];
}

static int fio_sgio_get_bs(struct thread_data *td, unsigned int *bs)
{
	struct sgio_data *sd = td->io_ops->data;
	struct io_u *io_u;
	struct sg_io_hdr *hdr;
	unsigned char buf[8];
	int ret;

	io_u = __get_io_u(td);
	assert(io_u);

	hdr = &io_u->hdr;
	sgio_hdr_init(sd, hdr, io_u, 0);
	memset(buf, 0, sizeof(buf));

	hdr->cmdp[0] = 0x25;
	hdr->dxfer_direction = SG_DXFER_FROM_DEV;
	hdr->dxferp = buf;
	hdr->dxfer_len = sizeof(buf);

	ret = fio_sgio_doio(td, io_u, 1);
	if (ret) {
		put_io_u(td, io_u);
		return ret;
	}

	*bs = (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7];
	put_io_u(td, io_u);
	return 0;
}

static void fio_sgio_cleanup(struct thread_data *td)
{
	if (td->io_ops->data) {
		free(td->io_ops->data);
		td->io_ops->data = NULL;
	}
}

static int fio_sgio_init(struct thread_data *td)
{
	struct fio_file *f = &td->files[0];
	struct sgio_data *sd;
	unsigned int bs;
	int ret;

	sd = malloc(sizeof(*sd));
	memset(sd, 0, sizeof(*sd));
	sd->cmds = malloc(td->iodepth * sizeof(struct sgio_cmd));
	memset(sd->cmds, 0, td->iodepth * sizeof(struct sgio_cmd));
	sd->events = malloc(td->iodepth * sizeof(struct io_u *));
	memset(sd->events, 0, td->iodepth * sizeof(struct io_u *));
	td->io_ops->data = sd;

	if (td->filetype == FIO_TYPE_BD) {
		if (ioctl(f->fd, BLKSSZGET, &bs) < 0) {
			td_verror(td, errno);
			goto err;
		}
	} else if (td->filetype == FIO_TYPE_CHAR) {
		int version;

		if (ioctl(f->fd, SG_GET_VERSION_NUM, &version) < 0) {
			td_verror(td, errno);
			goto err;
		}

		ret = fio_sgio_get_bs(td, &bs);
		if (ret)
			goto err;
	} else {
		log_err("ioengine sgio only works on block devices\n");
		goto err;
	}

	sd->bs = bs;

	if (td->filetype == FIO_TYPE_BD)
		td->io_ops->getevents = fio_sgio_ioctl_getevents;
	else
		td->io_ops->getevents = fio_sgio_getevents;

	/*
	 * we want to do it, regardless of whether odirect is set or not
	 */
	td->override_sync = 1;
	return 0;
err:
	free(sd->events);
	free(sd->cmds);
	free(sd);
	td->io_ops->data = NULL;
	return 1;
}

static struct ioengine_ops ioengine = {
	.name		= "sg",
	.version	= FIO_IOOPS_VERSION,
	.init		= fio_sgio_init,
	.prep		= fio_sgio_prep,
	.queue		= fio_sgio_queue,
	.getevents	= fio_sgio_getevents,
	.event		= fio_sgio_event,
	.cleanup	= fio_sgio_cleanup,
	.flags		= FIO_SYNCIO | FIO_RAWIO,
};

#else /* FIO_HAVE_SGIO */

/*
 * 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_sgio_init(struct thread_data fio_unused *td)
{
	fprintf(stderr, "fio: sgio not available\n");
	return 1;
}

static struct ioengine_ops ioengine = {
	.name		= "sgio",
	.version	= FIO_IOOPS_VERSION,
	.init		= fio_sgio_init,
};

#endif

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

static void fio_exit fio_sgio_unregister(void)
{
	unregister_ioengine(&ioengine);
}
Commit	Line	Data
2866c82d JA	1	/*
	2	* scsi generic sg v3 io engine
	3	*
	4	*/
	5	#include <stdio.h>
	6	#include <stdlib.h>
	7	#include <unistd.h>
	8	#include <errno.h>
	9	#include <assert.h>
	10	#include <sys/poll.h>
5f350952 JA	11
	12	#include "../fio.h"
	13	#include "../os.h"
2866c82d	14
34cfcdaf JA	15	#ifdef FIO_HAVE_SGIO
34cfcdaf JA	16
2866c82d JA	17	struct sgio_cmd {
	18	unsigned char cdb[10];
	19	int nr;
	20	};
	21
	22	struct sgio_data {
	23	struct sgio_cmd *cmds;
	24	struct io_u **events;
	25	unsigned int bs;
	26	};
	27
	28	static void sgio_hdr_init(struct sgio_data sd, struct sg_io_hdr hdr,
	29	struct io_u *io_u, int fs)
	30	{
	31	struct sgio_cmd *sc = &sd->cmds[io_u->index];
	32
	33	memset(hdr, 0, sizeof(*hdr));
	34	memset(sc->cdb, 0, sizeof(sc->cdb));
	35
	36	hdr->interface_id = 'S';
	37	hdr->cmdp = sc->cdb;
	38	hdr->cmd_len = sizeof(sc->cdb);
	39	hdr->pack_id = io_u->index;
	40	hdr->usr_ptr = io_u;
	41
	42	if (fs) {
cec6b55d JA	43	hdr->dxferp = io_u->xfer_buf;
cec6b55d JA	44	hdr->dxfer_len = io_u->xfer_buflen;
2866c82d JA	45	}
	46	}
	47
	48	static int fio_sgio_ioctl_getevents(struct thread_data *td, int fio_unused min,
	49	int max, struct timespec fio_unused *t)
	50	{
	51	assert(max <= 1);
	52
	53	/*
	54	* we can only have one finished io_u for sync io, since the depth
	55	* is always 1
	56	*/
	57	if (list_empty(&td->io_u_busylist))
	58	return 0;
	59
	60	return 1;
	61	}
	62
adee86c5 JA	63	static int pollin_events(struct pollfd *pfds, int fds)
	64	{
	65	int i;
	66
	67	for (i = 0; i < fds; i++)
	68	if (pfds[i].revents & POLLIN)
	69	return 1;
	70
	71	return 0;
	72	}
2866c82d JA	73
	74	static int fio_sgio_getevents(struct thread_data *td, int min, int max,
	75	struct timespec fio_unused *t)
	76	{
adee86c5 JA	77	/*
	78	* normally hard coding &td->files[0] is a bug that needs to be fixed,
	79	* but it's ok here as all files should point to the same device.
	80	*/
53cdc686	81	struct fio_file *f = &td->files[0];
2866c82d	82	struct sgio_data *sd = td->io_ops->data;
adee86c5 JA	83	int left = max, ret, events, i, r = 0, *fl;
	84	struct pollfd *pfds;
	85	void *buf;
2866c82d JA	86
2866c82d JA	87	/*
adee86c5	88	* Fill in the file descriptors
2866c82d	89	*/
adee86c5 JA	90	pfds = malloc(sizeof(struct pollfd) * td->nr_files);
	91	fl = malloc(sizeof(int) * td->nr_files);
	92
	93	for_each_file(td, f, i) {
	94	/*
	95	* don't block for min events == 0
	96	*/
	97	if (!min) {
	98	fl[i] = fcntl(f->fd, F_GETFL);
	99	fcntl(f->fd, F_SETFL, fl[i] \| O_NONBLOCK);
	100	}
	101	pfds[i].fd = f->fd;
	102	pfds[i].events = POLLIN;
2866c82d JA	103	}
2866c82d JA	104
adee86c5	105	buf = malloc(max * sizeof(struct sg_io_hdr));
2866c82d	106	while (left) {
adee86c5 JA	107	void *p;
adee86c5 JA	108
2866c82d JA	109	do {
	110	if (!min)
	111	break;
adee86c5 JA	112
	113	ret = poll(pfds, td->nr_files, -1);
	114	if (ret < 0) {
	115	td_verror(td, errno);
	116	if (!r)
	117	r = -1;
	118	break;
	119	} else if (!ret)
	120	continue;
	121
	122	if (pollin_events(pfds, td->nr_files))
2866c82d JA	123	break;
	124	} while (1);
	125
adee86c5	126	if (r < 0)
2866c82d	127	break;
adee86c5 JA	128
	129	re_read:
	130	p = buf;
	131	events = 0;
	132	for_each_file(td, f, i) {
	133	ret = read(f->fd, p, left * sizeof(struct sg_io_hdr));
	134	if (ret < 0) {
	135	if (errno == EAGAIN)
	136	continue;
	137	td_verror(td, errno);
	138	r = -1;
	139	break;
	140	} else if (ret) {
	141	p += ret;
	142	events += ret / sizeof(struct sg_io_hdr);
	143	}
	144	}
	145
	146	if (r < 0)
2866c82d	147	break;
adee86c5 JA	148	if (!events) {
	149	usleep(1000);
	150	goto re_read;
	151	}
2866c82d	152
2866c82d JA	153	left -= events;
	154	r += events;
	155
	156	for (i = 0; i < events; i++) {
	157	struct sg_io_hdr hdr = (struct sg_io_hdr ) buf + i;
	158
	159	sd->events[i] = hdr->usr_ptr;
	160	}
	161	}
	162
adee86c5 JA	163	if (!min) {
	164	for_each_file(td, f, i)
	165	fcntl(f->fd, F_SETFL, fl[i]);
	166	}
2866c82d JA	167
2866c82d JA	168	free(buf);
adee86c5 JA	169	free(pfds);
adee86c5 JA	170	free(fl);
2866c82d JA	171	return r;
	172	}
	173
7a16dd02 JA	174	static int fio_sgio_ioctl_doio(struct thread_data *td,
7a16dd02 JA	175	struct fio_file f, struct io_u io_u)
2866c82d JA	176	{
	177	struct sgio_data *sd = td->io_ops->data;
	178	struct sg_io_hdr *hdr = &io_u->hdr;
	179
	180	sd->events[0] = io_u;
	181
53cdc686	182	return ioctl(f->fd, SG_IO, hdr);
2866c82d JA	183	}
2866c82d JA	184
7a16dd02	185	static int fio_sgio_rw_doio(struct fio_file f, struct io_u io_u, int sync)
2866c82d JA	186	{
	187	struct sg_io_hdr *hdr = &io_u->hdr;
	188	int ret;
	189
53cdc686	190	ret = write(f->fd, hdr, sizeof(*hdr));
2866c82d JA	191	if (ret < 0)
	192	return errno;
	193
	194	if (sync) {
53cdc686	195	ret = read(f->fd, hdr, sizeof(*hdr));
2866c82d JA	196	if (ret < 0)
	197	return errno;
	198	}
	199
	200	return 0;
	201	}
	202
	203	static int fio_sgio_doio(struct thread_data td, struct io_u io_u, int sync)
	204	{
53cdc686 JA	205	struct fio_file *f = io_u->file;
53cdc686 JA	206
2866c82d	207	if (td->filetype == FIO_TYPE_BD)
53cdc686	208	return fio_sgio_ioctl_doio(td, f, io_u);
2866c82d	209
7a16dd02	210	return fio_sgio_rw_doio(f, io_u, sync);
2866c82d JA	211	}
2866c82d JA	212
2866c82d JA	213	static int fio_sgio_prep(struct thread_data td, struct io_u io_u)
	214	{
	215	struct sg_io_hdr *hdr = &io_u->hdr;
	216	struct sgio_data *sd = td->io_ops->data;
	217	int nr_blocks, lba;
	218
cec6b55d	219	if (io_u->xfer_buflen & (sd->bs - 1)) {
2866c82d JA	220	log_err("read/write not sector aligned\n");
	221	return EINVAL;
	222	}
	223
2866c82d	224	if (io_u->ddir == DDIR_READ) {
87dc1ab1 JA	225	sgio_hdr_init(sd, hdr, io_u, 1);
87dc1ab1 JA	226
2866c82d JA	227	hdr->dxfer_direction = SG_DXFER_FROM_DEV;
2866c82d JA	228	hdr->cmdp[0] = 0x28;
87dc1ab1 JA	229	} else if (io_u->ddir == DDIR_WRITE) {
	230	sgio_hdr_init(sd, hdr, io_u, 1);
	231
2866c82d JA	232	hdr->dxfer_direction = SG_DXFER_TO_DEV;
2866c82d JA	233	hdr->cmdp[0] = 0x2a;
87dc1ab1 JA	234	} else {
	235	sgio_hdr_init(sd, hdr, io_u, 0);
	236
	237	hdr->dxfer_direction = SG_DXFER_NONE;
	238	hdr->cmdp[0] = 0x35;
	239	}
	240
	241	if (hdr->dxfer_direction != SG_DXFER_NONE) {
cec6b55d	242	nr_blocks = io_u->xfer_buflen / sd->bs;
87dc1ab1	243	lba = io_u->offset / sd->bs;
1e97cce9 JA	244	hdr->cmdp[2] = (unsigned char) ((lba >> 24) & 0xff);
	245	hdr->cmdp[3] = (unsigned char) ((lba >> 16) & 0xff);
	246	hdr->cmdp[4] = (unsigned char) ((lba >> 8) & 0xff);
	247	hdr->cmdp[5] = (unsigned char) (lba & 0xff);
	248	hdr->cmdp[7] = (unsigned char) ((nr_blocks >> 8) & 0xff);
	249	hdr->cmdp[8] = (unsigned char) (nr_blocks & 0xff);
2866c82d JA	250	}
2866c82d JA	251
2866c82d JA	252	return 0;
	253	}
	254
	255	static int fio_sgio_queue(struct thread_data td, struct io_u io_u)
	256	{
	257	struct sg_io_hdr *hdr = &io_u->hdr;
	258	int ret;
	259
87dc1ab1	260	ret = fio_sgio_doio(td, io_u, io_u->ddir == DDIR_SYNC);
2866c82d JA	261
	262	if (ret < 0)
	263	io_u->error = errno;
	264	else if (hdr->status) {
	265	io_u->resid = hdr->resid;
	266	io_u->error = EIO;
	267	}
	268
	269	return io_u->error;
	270	}
	271
	272	static struct io_u fio_sgio_event(struct thread_data td, int event)
	273	{
	274	struct sgio_data *sd = td->io_ops->data;
	275
	276	return sd->events[event];
	277	}
	278
	279	static int fio_sgio_get_bs(struct thread_data td, unsigned int bs)
	280	{
	281	struct sgio_data *sd = td->io_ops->data;
	282	struct io_u *io_u;
	283	struct sg_io_hdr *hdr;
	284	unsigned char buf[8];
	285	int ret;
	286
	287	io_u = __get_io_u(td);
	288	assert(io_u);
	289
	290	hdr = &io_u->hdr;
	291	sgio_hdr_init(sd, hdr, io_u, 0);
	292	memset(buf, 0, sizeof(buf));
	293
	294	hdr->cmdp[0] = 0x25;
	295	hdr->dxfer_direction = SG_DXFER_FROM_DEV;
	296	hdr->dxferp = buf;
	297	hdr->dxfer_len = sizeof(buf);
	298
	299	ret = fio_sgio_doio(td, io_u, 1);
	300	if (ret) {
	301	put_io_u(td, io_u);
	302	return ret;
	303	}
	304
	305	*bs = (buf[4] << 24) \| (buf[5] << 16) \| (buf[6] << 8) \| buf[7];
	306	put_io_u(td, io_u);
	307	return 0;
	308	}
	309
	310	static void fio_sgio_cleanup(struct thread_data *td)
	311	{
	312	if (td->io_ops->data) {
	313	free(td->io_ops->data);
	314	td->io_ops->data = NULL;
	315	}
	316	}
	317
	318	static int fio_sgio_init(struct thread_data *td)
	319	{
53cdc686	320	struct fio_file *f = &td->files[0];
2866c82d JA	321	struct sgio_data *sd;
	322	unsigned int bs;
	323	int ret;
	324
	325	sd = malloc(sizeof(*sd));
cb781c75	326	memset(sd, 0, sizeof(*sd));
2866c82d	327	sd->cmds = malloc(td->iodepth * sizeof(struct sgio_cmd));
cb781c75	328	memset(sd->cmds, 0, td->iodepth * sizeof(struct sgio_cmd));
2866c82d	329	sd->events = malloc(td->iodepth * sizeof(struct io_u *));
cb781c75	330	memset(sd->events, 0, td->iodepth * sizeof(struct io_u *));
2866c82d JA	331	td->io_ops->data = sd;
	332
	333	if (td->filetype == FIO_TYPE_BD) {
53cdc686	334	if (ioctl(f->fd, BLKSSZGET, &bs) < 0) {
2866c82d	335	td_verror(td, errno);
cb781c75	336	goto err;
2866c82d JA	337	}
	338	} else if (td->filetype == FIO_TYPE_CHAR) {
	339	int version;
	340
53cdc686	341	if (ioctl(f->fd, SG_GET_VERSION_NUM, &version) < 0) {
2866c82d	342	td_verror(td, errno);
cb781c75	343	goto err;
2866c82d JA	344	}
	345
	346	ret = fio_sgio_get_bs(td, &bs);
	347	if (ret)
cb781c75	348	goto err;
2866c82d JA	349	} else {
2866c82d JA	350	log_err("ioengine sgio only works on block devices\n");
cb781c75	351	goto err;
2866c82d JA	352	}
	353
	354	sd->bs = bs;
	355
	356	if (td->filetype == FIO_TYPE_BD)
	357	td->io_ops->getevents = fio_sgio_ioctl_getevents;
	358	else
	359	td->io_ops->getevents = fio_sgio_getevents;
	360
	361	/*
	362	* we want to do it, regardless of whether odirect is set or not
	363	*/
	364	td->override_sync = 1;
	365	return 0;
cb781c75 JA	366	err:
	367	free(sd->events);
	368	free(sd->cmds);
	369	free(sd);
e8b8c9f1	370	td->io_ops->data = NULL;
cb781c75	371	return 1;
2866c82d JA	372	}
2866c82d JA	373
5f350952	374	static struct ioengine_ops ioengine = {
2866c82d JA	375	.name = "sg",
	376	.version = FIO_IOOPS_VERSION,
	377	.init = fio_sgio_init,
	378	.prep = fio_sgio_prep,
	379	.queue = fio_sgio_queue,
	380	.getevents = fio_sgio_getevents,
	381	.event = fio_sgio_event,
	382	.cleanup = fio_sgio_cleanup,
b2a15192	383	.flags = FIO_SYNCIO \| FIO_RAWIO,
2866c82d	384	};
34cfcdaf JA	385
	386	#else /* FIO_HAVE_SGIO */
	387
	388	/*
	389	* When we have a proper configure system in place, we simply wont build
	390	* and install this io engine. For now install a crippled version that
	391	* just complains and fails to load.
	392	*/
	393	static int fio_sgio_init(struct thread_data fio_unused *td)
	394	{
	395	fprintf(stderr, "fio: sgio not available\n");
	396	return 1;
	397	}
	398
5f350952	399	static struct ioengine_ops ioengine = {
34cfcdaf JA	400	.name = "sgio",
	401	.version = FIO_IOOPS_VERSION,
	402	.init = fio_sgio_init,
	403	};
	404
	405	#endif
5f350952 JA	406
	407	static void fio_init fio_sgio_register(void)
	408	{
	409	register_ioengine(&ioengine);
	410	}
	411
	412	static void fio_exit fio_sgio_unregister(void)
	413	{
	414	unregister_ioengine(&ioengine);
	415	}