[fio.git] / engines / libzbc.c

/*
 * Copyright (C) 2019 Western Digital Corporation or its affiliates.
 *
 * This file is released under the GPL.
 *
 * libzbc engine
 * IO engine using libzbc library to talk to SMR disks.
 */
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <libzbc/zbc.h>

#include "fio.h"
#include "err.h"
#include "zbd_types.h"

struct libzbc_data {
	struct zbc_device	*zdev;
	enum zbc_dev_model	model;
	uint64_t		nr_sectors;
};

static int libzbc_get_dev_info(struct libzbc_data *ld, struct fio_file *f)
{
	struct zbc_device_info *zinfo;

	zinfo = calloc(1, sizeof(*zinfo));
	if (!zinfo)
		return -ENOMEM;

	zbc_get_device_info(ld->zdev, zinfo);
	ld->model = zinfo->zbd_model;
	ld->nr_sectors = zinfo->zbd_sectors;

	dprint(FD_ZBD, "%s: vendor_id:%s, type: %s, model: %s\n",
	       f->file_name, zinfo->zbd_vendor_id,
	       zbc_device_type_str(zinfo->zbd_type),
	       zbc_device_model_str(zinfo->zbd_model));

	free(zinfo);

	return 0;
}

static int libzbc_open_dev(struct thread_data *td, struct fio_file *f,
			   struct libzbc_data **p_ld)
{
	struct libzbc_data *ld = td->io_ops_data;
	int ret, flags = OS_O_DIRECT;

	if (ld) {
		/* Already open */
		assert(ld->zdev);
		goto out;
	}

	if (f->filetype != FIO_TYPE_BLOCK && f->filetype != FIO_TYPE_CHAR) {
		td_verror(td, EINVAL, "wrong file type");
		log_err("ioengine libzbc only works on block or character devices\n");
		return -EINVAL;
	}

	if (td_write(td)) {
		if (!read_only)
			flags |= O_RDWR;
	} else if (td_read(td)) {
		if (f->filetype == FIO_TYPE_CHAR && !read_only)
			flags |= O_RDWR;
		else
			flags |= O_RDONLY;
	} else if (td_trim(td)) {
		td_verror(td, EINVAL, "libzbc does not support trim");
		log_err("%s: libzbc does not support trim\n", f->file_name);
		return -EINVAL;
	}

	if (td->o.oatomic) {
		td_verror(td, EINVAL, "libzbc does not support O_ATOMIC");
		log_err("%s: libzbc does not support O_ATOMIC\n", f->file_name);
		return -EINVAL;
	}

	ld = calloc(1, sizeof(*ld));
	if (!ld)
		return -ENOMEM;

	ret = zbc_open(f->file_name,
		       flags | ZBC_O_DRV_BLOCK | ZBC_O_DRV_SCSI | ZBC_O_DRV_ATA,
		       &ld->zdev);
	if (ret) {
		log_err("%s: zbc_open() failed, err=%d\n",
			f->file_name, ret);
		goto err;
	}

	ret = libzbc_get_dev_info(ld, f);
	if (ret)
		goto err_close;

	td->io_ops_data = ld;
out:
	if (p_ld)
		*p_ld = ld;

	return 0;

err_close:
	zbc_close(ld->zdev);
err:
	free(ld);
	return ret;
}

static int libzbc_close_dev(struct thread_data *td)
{
	struct libzbc_data *ld = td->io_ops_data;
	int ret = 0;

	td->io_ops_data = NULL;
	if (ld) {
		if (ld->zdev)
			ret = zbc_close(ld->zdev);
		free(ld);
	}

	return ret;
}
static int libzbc_open_file(struct thread_data *td, struct fio_file *f)
{
	return libzbc_open_dev(td, f, NULL);
}

static int libzbc_close_file(struct thread_data *td, struct fio_file *f)
{
	int ret;

	ret = libzbc_close_dev(td);
	if (ret)
		log_err("%s: close device failed err %d\n",
			f->file_name, ret);

	return ret;
}

static void libzbc_cleanup(struct thread_data *td)
{
	libzbc_close_dev(td);
}

static int libzbc_invalidate(struct thread_data *td, struct fio_file *f)
{
	/* Passthrough IO do not cache data. Nothing to do */
	return 0;
}

static int libzbc_get_file_size(struct thread_data *td, struct fio_file *f)
{
	struct libzbc_data *ld;
	int ret;

	if (fio_file_size_known(f))
		return 0;

	ret = libzbc_open_dev(td, f, &ld);
	if (ret)
		return ret;

	f->real_file_size = ld->nr_sectors << 9;
	fio_file_set_size_known(f);

	return 0;
}

static int libzbc_get_zoned_model(struct thread_data *td, struct fio_file *f,
				  enum zbd_zoned_model *model)
{
	struct libzbc_data *ld;
	int ret;

	if (f->filetype != FIO_TYPE_BLOCK && f->filetype != FIO_TYPE_CHAR) {
		*model = ZBD_IGNORE;
		return 0;
	}

	ret = libzbc_open_dev(td, f, &ld);
	if (ret)
		return ret;

	switch (ld->model) {
	case ZBC_DM_HOST_AWARE:
		*model = ZBD_HOST_AWARE;
		break;
	case ZBC_DM_HOST_MANAGED:
		*model = ZBD_HOST_MANAGED;
		break;
	default:
		*model = ZBD_NONE;
		break;
	}

	return 0;
}

static int libzbc_report_zones(struct thread_data *td, struct fio_file *f,
			       uint64_t offset, struct zbd_zone *zbdz,
			       unsigned int nr_zones)
{
	struct libzbc_data *ld;
	uint64_t sector = offset >> 9;
	struct zbc_zone *zones;
	unsigned int i;
	int ret;

	ret = libzbc_open_dev(td, f, &ld);
	if (ret)
		return ret;

	if (sector >= ld->nr_sectors)
		return 0;

	zones = calloc(nr_zones, sizeof(struct zbc_zone));
	if (!zones) {
		ret = -ENOMEM;
		goto out;
	}

	ret = zbc_report_zones(ld->zdev, sector, ZBC_RO_ALL, zones, &nr_zones);
	if (ret < 0) {
		log_err("%s: zbc_report_zones failed, err=%d\n",
			f->file_name, ret);
		goto out;
	}

	for (i = 0; i < nr_zones; i++, zbdz++) {
		zbdz->start = zones[i].zbz_start << 9;
		zbdz->len = zones[i].zbz_length << 9;
		zbdz->wp = zones[i].zbz_write_pointer << 9;
		/*
		 * ZBC/ZAC do not define zone capacity, so use the zone size as
		 * the zone capacity.
		 */
		zbdz->capacity = zbdz->len;

		switch (zones[i].zbz_type) {
		case ZBC_ZT_CONVENTIONAL:
			zbdz->type = ZBD_ZONE_TYPE_CNV;
			break;
		case ZBC_ZT_SEQUENTIAL_REQ:
			zbdz->type = ZBD_ZONE_TYPE_SWR;
			break;
		case ZBC_ZT_SEQUENTIAL_PREF:
			zbdz->type = ZBD_ZONE_TYPE_SWP;
			break;
		default:
			td_verror(td, errno, "invalid zone type");
			log_err("%s: invalid type for zone at sector %llu.\n",
				f->file_name, (unsigned long long)zbdz->start);
			ret = -EIO;
			goto out;
		}

		switch (zones[i].zbz_condition) {
		case ZBC_ZC_NOT_WP:
			zbdz->cond = ZBD_ZONE_COND_NOT_WP;
			break;
		case ZBC_ZC_EMPTY:
			zbdz->cond = ZBD_ZONE_COND_EMPTY;
			break;
		case ZBC_ZC_IMP_OPEN:
			zbdz->cond = ZBD_ZONE_COND_IMP_OPEN;
			break;
		case ZBC_ZC_EXP_OPEN:
			zbdz->cond = ZBD_ZONE_COND_EXP_OPEN;
			break;
		case ZBC_ZC_CLOSED:
			zbdz->cond = ZBD_ZONE_COND_CLOSED;
			break;
		case ZBC_ZC_FULL:
			zbdz->cond = ZBD_ZONE_COND_FULL;
			break;
		case ZBC_ZC_RDONLY:
		case ZBC_ZC_OFFLINE:
		default:
			/* Treat all these conditions as offline (don't use!) */
			zbdz->cond = ZBD_ZONE_COND_OFFLINE;
			zbdz->wp = zbdz->start;
		}
	}

	ret = nr_zones;
out:
	free(zones);
	return ret;
}

static int libzbc_reset_wp(struct thread_data *td, struct fio_file *f,
			   uint64_t offset, uint64_t length)
{
	struct libzbc_data *ld = td->io_ops_data;
	uint64_t sector = offset >> 9;
	uint64_t end_sector = (offset + length) >> 9;
	unsigned int nr_zones;
	struct zbc_errno err;
	int i, ret;

	assert(ld);
	assert(ld->zdev);

	nr_zones = (length + td->o.zone_size - 1) / td->o.zone_size;
	if (!sector && end_sector >= ld->nr_sectors) {
		/* Reset all zones */
		ret = zbc_reset_zone(ld->zdev, 0, ZBC_OP_ALL_ZONES);
		if (ret)
			goto err;

		return 0;
	}

	for (i = 0; i < nr_zones; i++, sector += td->o.zone_size >> 9) {
		ret = zbc_reset_zone(ld->zdev, sector, 0);
		if (ret)
			goto err;
	}

	return 0;

err:
	zbc_errno(ld->zdev, &err);
	td_verror(td, errno, "zbc_reset_zone failed");
	if (err.sk)
		log_err("%s: reset wp failed %s:%s\n",
			f->file_name,
			zbc_sk_str(err.sk), zbc_asc_ascq_str(err.asc_ascq));
	return -ret;
}

ssize_t libzbc_rw(struct thread_data *td, struct io_u *io_u)
{
	struct libzbc_data *ld = td->io_ops_data;
	struct fio_file *f = io_u->file;
	uint64_t sector = io_u->offset >> 9;
	size_t count = io_u->xfer_buflen >> 9;
	struct zbc_errno err;
	ssize_t ret;

	if (io_u->ddir == DDIR_WRITE)
		ret = zbc_pwrite(ld->zdev, io_u->xfer_buf, count, sector);
	else
		ret = zbc_pread(ld->zdev, io_u->xfer_buf, count, sector);
	if (ret == count)
		return ret;

	if (ret > 0) {
		log_err("Short %s, len=%zu, ret=%zd\n",
			io_u->ddir == DDIR_READ ? "read" : "write",
			count << 9, ret << 9);
		return -EIO;
	}

	/* I/O error */
	zbc_errno(ld->zdev, &err);
	td_verror(td, errno, "libzbc i/o failed");
	if (err.sk) {
		log_err("%s: op %u offset %llu+%llu failed (%s:%s), err %zd\n",
			f->file_name, io_u->ddir,
			io_u->offset, io_u->xfer_buflen,
			zbc_sk_str(err.sk),
			zbc_asc_ascq_str(err.asc_ascq), ret);
	} else {
		log_err("%s: op %u offset %llu+%llu failed, err %zd\n",
			f->file_name, io_u->ddir,
			io_u->offset, io_u->xfer_buflen, ret);
	}

	return -EIO;
}

static enum fio_q_status libzbc_queue(struct thread_data *td, struct io_u *io_u)
{
	struct libzbc_data *ld = td->io_ops_data;
	struct fio_file *f = io_u->file;
	ssize_t ret = 0;

	fio_ro_check(td, io_u);

	dprint(FD_ZBD, "%p:%s: libzbc queue %llu\n",
	       td, f->file_name, io_u->offset);

	if (io_u->ddir == DDIR_READ || io_u->ddir == DDIR_WRITE) {
		ret = libzbc_rw(td, io_u);
	} else if (ddir_sync(io_u->ddir)) {
		ret = zbc_flush(ld->zdev);
		if (ret)
			log_err("zbc_flush error %zd\n", ret);
	} else if (io_u->ddir != DDIR_TRIM) {
		log_err("Unsupported operation %u\n", io_u->ddir);
		ret = -EINVAL;
	}
	if (ret < 0)
		io_u->error = -ret;

	return FIO_Q_COMPLETED;
}

FIO_STATIC struct ioengine_ops ioengine = {
	.name			= "libzbc",
	.version		= FIO_IOOPS_VERSION,
	.open_file		= libzbc_open_file,
	.close_file		= libzbc_close_file,
	.cleanup		= libzbc_cleanup,
	.invalidate		= libzbc_invalidate,
	.get_file_size		= libzbc_get_file_size,
	.get_zoned_model	= libzbc_get_zoned_model,
	.report_zones		= libzbc_report_zones,
	.reset_wp		= libzbc_reset_wp,
	.queue			= libzbc_queue,
	.flags			= FIO_SYNCIO | FIO_NOEXTEND | FIO_RAWIO,
};

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

static void fio_exit fio_libzbc_unregister(void)
{
	unregister_ioengine(&ioengine);
}
Commit	Line	Data
56a19325 DF	1	/*
	2	* Copyright (C) 2019 Western Digital Corporation or its affiliates.
	3	*
	4	* This file is released under the GPL.
	5	*
	6	* libzbc engine
	7	* IO engine using libzbc library to talk to SMR disks.
	8	*/
	9	#include <stdlib.h>
	10	#include <unistd.h>
	11	#include <errno.h>
	12	#include <libzbc/zbc.h>
	13
	14	#include "fio.h"
	15	#include "err.h"
	16	#include "zbd_types.h"
	17
	18	struct libzbc_data {
	19	struct zbc_device *zdev;
	20	enum zbc_dev_model model;
	21	uint64_t nr_sectors;
	22	};
	23
	24	static int libzbc_get_dev_info(struct libzbc_data ld, struct fio_file f)
	25	{
	26	struct zbc_device_info *zinfo;
	27
	28	zinfo = calloc(1, sizeof(*zinfo));
	29	if (!zinfo)
	30	return -ENOMEM;
	31
	32	zbc_get_device_info(ld->zdev, zinfo);
	33	ld->model = zinfo->zbd_model;
	34	ld->nr_sectors = zinfo->zbd_sectors;
	35
	36	dprint(FD_ZBD, "%s: vendor_id:%s, type: %s, model: %s\n",
	37	f->file_name, zinfo->zbd_vendor_id,
	38	zbc_device_type_str(zinfo->zbd_type),
	39	zbc_device_model_str(zinfo->zbd_model));
	40
	41	free(zinfo);
	42
	43	return 0;
	44	}
	45
	46	static int libzbc_open_dev(struct thread_data td, struct fio_file f,
	47	struct libzbc_data **p_ld)
	48	{
	49	struct libzbc_data *ld = td->io_ops_data;
976fb54e	50	int ret, flags = OS_O_DIRECT;
56a19325 DF	51
	52	if (ld) {
	53	/* Already open */
	54	assert(ld->zdev);
	55	goto out;
	56	}
	57
	58	if (f->filetype != FIO_TYPE_BLOCK && f->filetype != FIO_TYPE_CHAR) {
	59	td_verror(td, EINVAL, "wrong file type");
	60	log_err("ioengine libzbc only works on block or character devices\n");
	61	return -EINVAL;
	62	}
	63
976fb54e	64	if (td_write(td)) {
56a19325 DF	65	if (!read_only)
	66	flags \|= O_RDWR;
	67	} else if (td_read(td)) {
	68	if (f->filetype == FIO_TYPE_CHAR && !read_only)
	69	flags \|= O_RDWR;
	70	else
	71	flags \|= O_RDONLY;
	72	} else if (td_trim(td)) {
	73	td_verror(td, EINVAL, "libzbc does not support trim");
976fb54e DF	74	log_err("%s: libzbc does not support trim\n", f->file_name);
976fb54e DF	75	return -EINVAL;
56a19325 DF	76	}
56a19325 DF	77
976fb54e	78	if (td->o.oatomic) {
56a19325	79	td_verror(td, EINVAL, "libzbc does not support O_ATOMIC");
976fb54e DF	80	log_err("%s: libzbc does not support O_ATOMIC\n", f->file_name);
	81	return -EINVAL;
	82	}
56a19325 DF	83
	84	ld = calloc(1, sizeof(*ld));
	85	if (!ld)
	86	return -ENOMEM;
	87
	88	ret = zbc_open(f->file_name,
ed2eb875 DF	89	flags \| ZBC_O_DRV_BLOCK \| ZBC_O_DRV_SCSI \| ZBC_O_DRV_ATA,
ed2eb875 DF	90	&ld->zdev);
56a19325 DF	91	if (ret) {
	92	log_err("%s: zbc_open() failed, err=%d\n",
	93	f->file_name, ret);
891660e4	94	goto err;
56a19325 DF	95	}
	96
	97	ret = libzbc_get_dev_info(ld, f);
891660e4 DF	98	if (ret)
891660e4 DF	99	goto err_close;
56a19325 DF	100
	101	td->io_ops_data = ld;
	102	out:
	103	if (p_ld)
	104	*p_ld = ld;
	105
	106	return 0;
891660e4 DF	107
	108	err_close:
	109	zbc_close(ld->zdev);
	110	err:
	111	free(ld);
	112	return ret;
56a19325 DF	113	}
	114
	115	static int libzbc_close_dev(struct thread_data *td)
	116	{
	117	struct libzbc_data *ld = td->io_ops_data;
	118	int ret = 0;
	119
	120	td->io_ops_data = NULL;
	121	if (ld) {
	122	if (ld->zdev)
	123	ret = zbc_close(ld->zdev);
	124	free(ld);
	125	}
	126
	127	return ret;
	128	}
	129	static int libzbc_open_file(struct thread_data td, struct fio_file f)
	130	{
	131	return libzbc_open_dev(td, f, NULL);
	132	}
	133
	134	static int libzbc_close_file(struct thread_data td, struct fio_file f)
	135	{
	136	int ret;
	137
	138	ret = libzbc_close_dev(td);
	139	if (ret)
	140	log_err("%s: close device failed err %d\n",
	141	f->file_name, ret);
	142
	143	return ret;
	144	}
	145
	146	static void libzbc_cleanup(struct thread_data *td)
	147	{
	148	libzbc_close_dev(td);
	149	}
	150
	151	static int libzbc_invalidate(struct thread_data td, struct fio_file f)
	152	{
	153	/* Passthrough IO do not cache data. Nothing to do */
	154	return 0;
	155	}
	156
	157	static int libzbc_get_file_size(struct thread_data td, struct fio_file f)
	158	{
	159	struct libzbc_data *ld;
	160	int ret;
	161
	162	if (fio_file_size_known(f))
	163	return 0;
	164
	165	ret = libzbc_open_dev(td, f, &ld);
	166	if (ret)
	167	return ret;
	168
	169	f->real_file_size = ld->nr_sectors << 9;
	170	fio_file_set_size_known(f);
	171
	172	return 0;
	173	}
	174
	175	static int libzbc_get_zoned_model(struct thread_data td, struct fio_file f,
	176	enum zbd_zoned_model *model)
177	{
178	struct libzbc_data *ld;
179	int ret;
180
181	if (f->filetype != FIO_TYPE_BLOCK && f->filetype != FIO_TYPE_CHAR) {
182	*model = ZBD_IGNORE;
183	return 0;
184	}
185
186	ret = libzbc_open_dev(td, f, &ld);
187	if (ret)
188	return ret;
189
190	switch (ld->model) {
191	case ZBC_DM_HOST_AWARE:
192	*model = ZBD_HOST_AWARE;
193	break;
194	case ZBC_DM_HOST_MANAGED:
195	*model = ZBD_HOST_MANAGED;
196	break;
197	default:
198	*model = ZBD_NONE;
199	break;
200	}
201
202	return 0;
203	}
204
205	static int libzbc_report_zones(struct thread_data td, struct fio_file f,
206	uint64_t offset, struct zbd_zone *zbdz,
207	unsigned int nr_zones)
208	{
209	struct libzbc_data *ld;
210	uint64_t sector = offset >> 9;
211	struct zbc_zone *zones;
212	unsigned int i;
213	int ret;
214
215	ret = libzbc_open_dev(td, f, &ld);
216	if (ret)
217	return ret;
218
219	if (sector >= ld->nr_sectors)
220	return 0;
221
222	zones = calloc(nr_zones, sizeof(struct zbc_zone));
223	if (!zones) {
224	ret = -ENOMEM;
225	goto out;
226	}
227
228	ret = zbc_report_zones(ld->zdev, sector, ZBC_RO_ALL, zones, &nr_zones);
229	if (ret < 0) {
230	log_err("%s: zbc_report_zones failed, err=%d\n",
231	f->file_name, ret);
232	goto out;
233	}
234
235	for (i = 0; i < nr_zones; i++, zbdz++) {
236	zbdz->start = zones[i].zbz_start << 9;
237	zbdz->len = zones[i].zbz_length << 9;
238	zbdz->wp = zones[i].zbz_write_pointer << 9;
236d23a8 SK	239	/*
	240	* ZBC/ZAC do not define zone capacity, so use the zone size as
	241	* the zone capacity.
	242	*/
	243	zbdz->capacity = zbdz->len;
56a19325 DF	244
	245	switch (zones[i].zbz_type) {
	246	case ZBC_ZT_CONVENTIONAL:
	247	zbdz->type = ZBD_ZONE_TYPE_CNV;
	248	break;
	249	case ZBC_ZT_SEQUENTIAL_REQ:
	250	zbdz->type = ZBD_ZONE_TYPE_SWR;
	251	break;
	252	case ZBC_ZT_SEQUENTIAL_PREF:
	253	zbdz->type = ZBD_ZONE_TYPE_SWP;
	254	break;
	255	default:
	256	td_verror(td, errno, "invalid zone type");
	257	log_err("%s: invalid type for zone at sector %llu.\n",
	258	f->file_name, (unsigned long long)zbdz->start);
	259	ret = -EIO;
	260	goto out;
	261	}
	262
	263	switch (zones[i].zbz_condition) {
	264	case ZBC_ZC_NOT_WP:
	265	zbdz->cond = ZBD_ZONE_COND_NOT_WP;
	266	break;
	267	case ZBC_ZC_EMPTY:
	268	zbdz->cond = ZBD_ZONE_COND_EMPTY;
	269	break;
	270	case ZBC_ZC_IMP_OPEN:
	271	zbdz->cond = ZBD_ZONE_COND_IMP_OPEN;
	272	break;
	273	case ZBC_ZC_EXP_OPEN:
	274	zbdz->cond = ZBD_ZONE_COND_EXP_OPEN;
	275	break;
	276	case ZBC_ZC_CLOSED:
	277	zbdz->cond = ZBD_ZONE_COND_CLOSED;
	278	break;
	279	case ZBC_ZC_FULL:
	280	zbdz->cond = ZBD_ZONE_COND_FULL;
	281	break;
	282	case ZBC_ZC_RDONLY:
	283	case ZBC_ZC_OFFLINE:
	284	default:
	285	/* Treat all these conditions as offline (don't use!) */
	286	zbdz->cond = ZBD_ZONE_COND_OFFLINE;
59b67452	287	zbdz->wp = zbdz->start;
56a19325 DF	288	}
	289	}
	290
	291	ret = nr_zones;
	292	out:
	293	free(zones);
	294	return ret;
	295	}
	296
	297	static int libzbc_reset_wp(struct thread_data td, struct fio_file f,
	298	uint64_t offset, uint64_t length)
	299	{
	300	struct libzbc_data *ld = td->io_ops_data;
	301	uint64_t sector = offset >> 9;
	302	uint64_t end_sector = (offset + length) >> 9;
	303	unsigned int nr_zones;
	304	struct zbc_errno err;
	305	int i, ret;
	306
	307	assert(ld);
	308	assert(ld->zdev);
	309
	310	nr_zones = (length + td->o.zone_size - 1) / td->o.zone_size;
	311	if (!sector && end_sector >= ld->nr_sectors) {
	312	/* Reset all zones */
	313	ret = zbc_reset_zone(ld->zdev, 0, ZBC_OP_ALL_ZONES);
	314	if (ret)
	315	goto err;
	316
	317	return 0;
	318	}
	319
	320	for (i = 0; i < nr_zones; i++, sector += td->o.zone_size >> 9) {
	321	ret = zbc_reset_zone(ld->zdev, sector, 0);
	322	if (ret)
	323	goto err;
	324	}
	325
	326	return 0;
	327
	328	err:
	329	zbc_errno(ld->zdev, &err);
	330	td_verror(td, errno, "zbc_reset_zone failed");
	331	if (err.sk)
	332	log_err("%s: reset wp failed %s:%s\n",
	333	f->file_name,
	334	zbc_sk_str(err.sk), zbc_asc_ascq_str(err.asc_ascq));
	335	return -ret;
	336	}
	337
	338	ssize_t libzbc_rw(struct thread_data td, struct io_u io_u)
	339	{
	340	struct libzbc_data *ld = td->io_ops_data;
	341	struct fio_file *f = io_u->file;
	342	uint64_t sector = io_u->offset >> 9;
	343	size_t count = io_u->xfer_buflen >> 9;
	344	struct zbc_errno err;
	345	ssize_t ret;
	346
	347	if (io_u->ddir == DDIR_WRITE)
	348	ret = zbc_pwrite(ld->zdev, io_u->xfer_buf, count, sector);
	349	else
	350	ret = zbc_pread(ld->zdev, io_u->xfer_buf, count, sector);
	351	if (ret == count)
352	return ret;
353
354	if (ret > 0) {
355	log_err("Short %s, len=%zu, ret=%zd\n",
356	io_u->ddir == DDIR_READ ? "read" : "write",
357	count << 9, ret << 9);
358	return -EIO;
359	}
360
361	/* I/O error */
362	zbc_errno(ld->zdev, &err);
363	td_verror(td, errno, "libzbc i/o failed");
364	if (err.sk) {
365	log_err("%s: op %u offset %llu+%llu failed (%s:%s), err %zd\n",
366	f->file_name, io_u->ddir,
367	io_u->offset, io_u->xfer_buflen,
368	zbc_sk_str(err.sk),
369	zbc_asc_ascq_str(err.asc_ascq), ret);
370	} else {
371	log_err("%s: op %u offset %llu+%llu failed, err %zd\n",
372	f->file_name, io_u->ddir,
373	io_u->offset, io_u->xfer_buflen, ret);
374	}
375
376	return -EIO;
377	}
378
379	static enum fio_q_status libzbc_queue(struct thread_data td, struct io_u io_u)
380	{
381	struct libzbc_data *ld = td->io_ops_data;
382	struct fio_file *f = io_u->file;
383	ssize_t ret = 0;
384
385	fio_ro_check(td, io_u);
386
387	dprint(FD_ZBD, "%p:%s: libzbc queue %llu\n",
388	td, f->file_name, io_u->offset);
389
390	if (io_u->ddir == DDIR_READ \|\| io_u->ddir == DDIR_WRITE) {
391	ret = libzbc_rw(td, io_u);
392	} else if (ddir_sync(io_u->ddir)) {
393	ret = zbc_flush(ld->zdev);
394	if (ret)
395	log_err("zbc_flush error %zd\n", ret);
396	} else if (io_u->ddir != DDIR_TRIM) {
397	log_err("Unsupported operation %u\n", io_u->ddir);
398	ret = -EINVAL;
399	}
400	if (ret < 0)
401	io_u->error = -ret;
402
403	return FIO_Q_COMPLETED;
404	}
405
5a8a6a03	406	FIO_STATIC struct ioengine_ops ioengine = {
56a19325 DF	407	.name = "libzbc",
	408	.version = FIO_IOOPS_VERSION,
	409	.open_file = libzbc_open_file,
	410	.close_file = libzbc_close_file,
	411	.cleanup = libzbc_cleanup,
	412	.invalidate = libzbc_invalidate,
	413	.get_file_size = libzbc_get_file_size,
	414	.get_zoned_model = libzbc_get_zoned_model,
	415	.report_zones = libzbc_report_zones,
	416	.reset_wp = libzbc_reset_wp,
	417	.queue = libzbc_queue,
	418	.flags = FIO_SYNCIO \| FIO_NOEXTEND \| FIO_RAWIO,
	419	};
	420
	421	static void fio_init fio_libzbc_register(void)
	422	{
	423	register_ioengine(&ioengine);
	424	}
	425
	426	static void fio_exit fio_libzbc_unregister(void)
	427	{
	428	unregister_ioengine(&ioengine);
	429	}