[ceph.git] / ceph / src / spdk / lib / scsi / dev.c

/*-
 *   BSD LICENSE
 *
 *   Copyright (C) 2008-2012 Daisuke Aoyama <aoyama@peach.ne.jp>.
 *   Copyright (c) Intel Corporation.
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *     * Neither the name of Intel Corporation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "scsi_internal.h"

static struct spdk_scsi_dev g_devs[SPDK_SCSI_MAX_DEVS];

struct spdk_scsi_dev *
spdk_scsi_dev_get_list(void)
{
	return g_devs;
}

static struct spdk_scsi_dev *
allocate_dev(void)
{
	struct spdk_scsi_dev *dev;
	int i;

	for (i = 0; i < SPDK_SCSI_MAX_DEVS; i++) {
		dev = &g_devs[i];
		if (!dev->is_allocated) {
			memset(dev, 0, sizeof(*dev));
			dev->id = i;
			dev->is_allocated = 1;
			return dev;
		}
	}

	return NULL;
}

static void
free_dev(struct spdk_scsi_dev *dev)
{
	assert(dev->is_allocated == 1);
	assert(dev->removed == true);

	dev->is_allocated = 0;
}

void
spdk_scsi_dev_destruct(struct spdk_scsi_dev *dev)
{
	int lun_cnt;
	int i;

	if (dev == NULL || dev->removed) {
		return;
	}

	dev->removed = true;
	lun_cnt = 0;

	for (i = 0; i < SPDK_SCSI_DEV_MAX_LUN; i++) {
		if (dev->lun[i] == NULL) {
			continue;
		}

		/*
		 * LUN will remove itself from this dev when all outstanding IO
		 * is done. When no more LUNs, dev will be deleted.
		 */
		spdk_scsi_lun_destruct(dev->lun[i]);
		lun_cnt++;
	}

	if (lun_cnt == 0) {
		free_dev(dev);
		return;
	}
}

static int
spdk_scsi_dev_find_lowest_free_lun_id(struct spdk_scsi_dev *dev)
{
	int i;

	for (i = 0; i < SPDK_SCSI_DEV_MAX_LUN; i++) {
		if (dev->lun[i] == NULL) {
			return i;
		}
	}

	return -1;
}

int
spdk_scsi_dev_add_lun(struct spdk_scsi_dev *dev, const char *bdev_name, int lun_id,
		      void (*hotremove_cb)(const struct spdk_scsi_lun *, void *),
		      void *hotremove_ctx)
{
	struct spdk_bdev *bdev;
	struct spdk_scsi_lun *lun;

	bdev = spdk_bdev_get_by_name(bdev_name);
	if (bdev == NULL) {
		SPDK_ERRLOG("device %s: cannot find bdev '%s' (target %d)\n",
			    dev->name, bdev_name, lun_id);
		return -1;
	}

	/* Search the lowest free LUN ID if LUN ID is default */
	if (lun_id == -1) {
		lun_id = spdk_scsi_dev_find_lowest_free_lun_id(dev);
		if (lun_id == -1) {
			SPDK_ERRLOG("Free LUN ID is not found\n");
			return -1;
		}
	}

	lun = spdk_scsi_lun_construct(bdev, hotremove_cb, hotremove_ctx);
	if (lun == NULL) {
		return -1;
	}

	lun->id = lun_id;
	lun->dev = dev;
	dev->lun[lun_id] = lun;
	return 0;
}

void
spdk_scsi_dev_delete_lun(struct spdk_scsi_dev *dev,
			 struct spdk_scsi_lun *lun)
{
	int lun_cnt = 0;
	int i;

	for (i = 0; i < SPDK_SCSI_DEV_MAX_LUN; i++) {
		if (dev->lun[i] == lun) {
			dev->lun[i] = NULL;
		}

		if (dev->lun[i]) {
			lun_cnt++;
		}
	}

	if (dev->removed == true && lun_cnt == 0) {
		free_dev(dev);
	}
}

/* This typedef exists to work around an astyle 2.05 bug.
 * Remove it when astyle is fixed.
 */
typedef struct spdk_scsi_dev _spdk_scsi_dev;

_spdk_scsi_dev *
spdk_scsi_dev_construct(const char *name, const char *bdev_name_list[],
			int *lun_id_list, int num_luns, uint8_t protocol_id,
			void (*hotremove_cb)(const struct spdk_scsi_lun *, void *),
			void *hotremove_ctx)
{
	struct spdk_scsi_dev *dev;
	size_t name_len;
	bool found_lun_0;
	int i, rc;

	name_len = strlen(name);
	if (name_len > sizeof(dev->name) - 1) {
		SPDK_ERRLOG("device %s: name longer than maximum allowed length %zu\n",
			    name, sizeof(dev->name) - 1);
		return NULL;
	}

	if (num_luns == 0) {
		SPDK_ERRLOG("device %s: no LUNs specified\n", name);
		return NULL;
	}

	found_lun_0 = false;
	for (i = 0; i < num_luns; i++) {
		if (lun_id_list[i] == 0) {
			found_lun_0 = true;
			break;
		}
	}

	if (!found_lun_0) {
		SPDK_ERRLOG("device %s: no LUN 0 specified\n", name);
		return NULL;
	}

	for (i = 0; i < num_luns; i++) {
		if (bdev_name_list[i] == NULL) {
			SPDK_ERRLOG("NULL spdk_scsi_lun for LUN %d\n",
				    lun_id_list[i]);
			return NULL;
		}
	}

	dev = allocate_dev();
	if (dev == NULL) {
		return NULL;
	}

	memcpy(dev->name, name, name_len + 1);

	dev->num_ports = 0;
	dev->protocol_id = protocol_id;

	for (i = 0; i < num_luns; i++) {
		rc = spdk_scsi_dev_add_lun(dev, bdev_name_list[i], lun_id_list[i],
					   hotremove_cb, hotremove_ctx);
		if (rc < 0) {
			spdk_scsi_dev_destruct(dev);
			return NULL;
		}
	}

	return dev;
}

void
spdk_scsi_dev_queue_mgmt_task(struct spdk_scsi_dev *dev,
			      struct spdk_scsi_task *task,
			      enum spdk_scsi_task_func func)
{
	assert(task != NULL);

	task->function = func;
	spdk_scsi_lun_task_mgmt_execute(task, func);
}

void
spdk_scsi_dev_queue_task(struct spdk_scsi_dev *dev,
			 struct spdk_scsi_task *task)
{
	assert(task != NULL);

	spdk_scsi_lun_execute_task(task->lun, task);
}

static struct spdk_scsi_port *
spdk_scsi_dev_find_free_port(struct spdk_scsi_dev *dev)
{
	int i;

	for (i = 0; i < SPDK_SCSI_DEV_MAX_PORTS; i++) {
		if (!dev->port[i].is_used) {
			return &dev->port[i];
		}
	}

	return NULL;
}

int
spdk_scsi_dev_add_port(struct spdk_scsi_dev *dev, uint64_t id, const char *name)
{
	struct spdk_scsi_port *port;
	int rc;

	if (dev->num_ports == SPDK_SCSI_DEV_MAX_PORTS) {
		SPDK_ERRLOG("device already has %d ports\n", SPDK_SCSI_DEV_MAX_PORTS);
		return -1;
	}

	port = spdk_scsi_dev_find_port_by_id(dev, id);
	if (port != NULL) {
		SPDK_ERRLOG("device already has port(%" PRIu64 ")\n", id);
		return -1;
	}

	port = spdk_scsi_dev_find_free_port(dev);
	if (port == NULL) {
		assert(false);
		return -1;
	}

	rc = spdk_scsi_port_construct(port, id, dev->num_ports, name);
	if (rc != 0) {
		return rc;
	}

	dev->num_ports++;
	return 0;
}

int
spdk_scsi_dev_delete_port(struct spdk_scsi_dev *dev, uint64_t id)
{
	struct spdk_scsi_port *port;

	port = spdk_scsi_dev_find_port_by_id(dev, id);
	if (port == NULL) {
		SPDK_ERRLOG("device does not have specified port(%" PRIu64 ")\n", id);
		return -1;
	}

	spdk_scsi_port_destruct(port);

	dev->num_ports--;

	return 0;
}

struct spdk_scsi_port *
spdk_scsi_dev_find_port_by_id(struct spdk_scsi_dev *dev, uint64_t id)
{
	int i;

	for (i = 0; i < SPDK_SCSI_DEV_MAX_PORTS; i++) {
		if (!dev->port[i].is_used) {
			continue;
		}
		if (dev->port[i].id == id) {
			return &dev->port[i];
		}
	}

	/* No matching port found. */
	return NULL;
}

void
spdk_scsi_dev_free_io_channels(struct spdk_scsi_dev *dev)
{
	int i;

	for (i = 0; i < SPDK_SCSI_DEV_MAX_LUN; i++) {
		if (dev->lun[i] == NULL) {
			continue;
		}
		_spdk_scsi_lun_free_io_channel(dev->lun[i]);
	}
}

int
spdk_scsi_dev_allocate_io_channels(struct spdk_scsi_dev *dev)
{
	int i, rc;

	for (i = 0; i < SPDK_SCSI_DEV_MAX_LUN; i++) {
		if (dev->lun[i] == NULL) {
			continue;
		}
		rc = _spdk_scsi_lun_allocate_io_channel(dev->lun[i]);
		if (rc < 0) {
			spdk_scsi_dev_free_io_channels(dev);
			return -1;
		}
	}

	return 0;
}

const char *
spdk_scsi_dev_get_name(const struct spdk_scsi_dev *dev)
{
	return dev->name;
}

int
spdk_scsi_dev_get_id(const struct spdk_scsi_dev *dev)
{
	return dev->id;
}

struct spdk_scsi_lun *
spdk_scsi_dev_get_lun(struct spdk_scsi_dev *dev, int lun_id)
{
	if (lun_id < 0 || lun_id >= SPDK_SCSI_DEV_MAX_LUN) {
		return NULL;
	}

	return dev->lun[lun_id];
}

bool
spdk_scsi_dev_has_pending_tasks(const struct spdk_scsi_dev *dev)
{
	int i;

	for (i = 0; i < SPDK_SCSI_DEV_MAX_LUN; ++i) {
		if (dev->lun[i] && spdk_scsi_lun_has_pending_tasks(dev->lun[i])) {
			return true;
		}
	}

	return false;
}
Commit	Line	Data
7c673cae FG	1	/*-
	2	* BSD LICENSE
	3	*
	4	* Copyright (C) 2008-2012 Daisuke Aoyama <aoyama@peach.ne.jp>.
	5	* Copyright (c) Intel Corporation.
	6	* All rights reserved.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	*
	12	* * Redistributions of source code must retain the above copyright
	13	* notice, this list of conditions and the following disclaimer.
	14	* * Redistributions in binary form must reproduce the above copyright
	15	* notice, this list of conditions and the following disclaimer in
	16	* the documentation and/or other materials provided with the
	17	* distribution.
	18	* * Neither the name of Intel Corporation nor the names of its
	19	* contributors may be used to endorse or promote products derived
	20	* from this software without specific prior written permission.
	21	*
	22	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	23	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	24	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	25	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	26	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	27	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	28	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	29	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	30	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	31	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	32	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	33	*/
	34
	35	#include "scsi_internal.h"
	36
	37	static struct spdk_scsi_dev g_devs[SPDK_SCSI_MAX_DEVS];
	38
	39	struct spdk_scsi_dev *
	40	spdk_scsi_dev_get_list(void)
	41	{
	42	return g_devs;
	43	}
	44
	45	static struct spdk_scsi_dev *
	46	allocate_dev(void)
	47	{
	48	struct spdk_scsi_dev *dev;
	49	int i;
	50
	51	for (i = 0; i < SPDK_SCSI_MAX_DEVS; i++) {
	52	dev = &g_devs[i];
	53	if (!dev->is_allocated) {
	54	memset(dev, 0, sizeof(*dev));
	55	dev->id = i;
	56	dev->is_allocated = 1;
	57	return dev;
	58	}
	59	}
	60
	61	return NULL;
	62	}
	63
	64	static void
65	free_dev(struct spdk_scsi_dev *dev)
66	{
11fdf7f2 TL	67	assert(dev->is_allocated == 1);
	68	assert(dev->removed == true);
	69
7c673cae FG	70	dev->is_allocated = 0;
	71	}
	72
	73	void
	74	spdk_scsi_dev_destruct(struct spdk_scsi_dev *dev)
	75	{
11fdf7f2	76	int lun_cnt;
7c673cae FG	77	int i;
7c673cae FG	78
11fdf7f2	79	if (dev == NULL \|\| dev->removed) {
7c673cae FG	80	return;
	81	}
	82
11fdf7f2 TL	83	dev->removed = true;
	84	lun_cnt = 0;
	85
	86	for (i = 0; i < SPDK_SCSI_DEV_MAX_LUN; i++) {
7c673cae FG	87	if (dev->lun[i] == NULL) {
	88	continue;
	89	}
	90
11fdf7f2 TL	91	/*
	92	* LUN will remove itself from this dev when all outstanding IO
	93	* is done. When no more LUNs, dev will be deleted.
	94	*/
7c673cae	95	spdk_scsi_lun_destruct(dev->lun[i]);
11fdf7f2	96	lun_cnt++;
7c673cae FG	97	}
7c673cae FG	98
11fdf7f2 TL	99	if (lun_cnt == 0) {
	100	free_dev(dev);
	101	return;
	102	}
7c673cae FG	103	}
	104
	105	static int
11fdf7f2	106	spdk_scsi_dev_find_lowest_free_lun_id(struct spdk_scsi_dev *dev)
7c673cae	107	{
11fdf7f2	108	int i;
7c673cae	109
11fdf7f2 TL	110	for (i = 0; i < SPDK_SCSI_DEV_MAX_LUN; i++) {
	111	if (dev->lun[i] == NULL) {
	112	return i;
	113	}
7c673cae FG	114	}
7c673cae FG	115
11fdf7f2 TL	116	return -1;
	117	}
	118
	119	int
	120	spdk_scsi_dev_add_lun(struct spdk_scsi_dev dev, const char bdev_name, int lun_id,
	121	void (hotremove_cb)(const struct spdk_scsi_lun , void *),
	122	void *hotremove_ctx)
	123	{
	124	struct spdk_bdev *bdev;
	125	struct spdk_scsi_lun *lun;
	126
	127	bdev = spdk_bdev_get_by_name(bdev_name);
	128	if (bdev == NULL) {
	129	SPDK_ERRLOG("device %s: cannot find bdev '%s' (target %d)\n",
	130	dev->name, bdev_name, lun_id);
	131	return -1;
	132	}
	133
	134	/* Search the lowest free LUN ID if LUN ID is default */
	135	if (lun_id == -1) {
	136	lun_id = spdk_scsi_dev_find_lowest_free_lun_id(dev);
	137	if (lun_id == -1) {
	138	SPDK_ERRLOG("Free LUN ID is not found\n");
	139	return -1;
	140	}
	141	}
	142
	143	lun = spdk_scsi_lun_construct(bdev, hotremove_cb, hotremove_ctx);
	144	if (lun == NULL) {
	145	return -1;
7c673cae FG	146	}
7c673cae FG	147
11fdf7f2 TL	148	lun->id = lun_id;
	149	lun->dev = dev;
	150	dev->lun[lun_id] = lun;
7c673cae FG	151	return 0;
	152	}
	153
	154	void
	155	spdk_scsi_dev_delete_lun(struct spdk_scsi_dev *dev,
	156	struct spdk_scsi_lun *lun)
	157	{
11fdf7f2	158	int lun_cnt = 0;
7c673cae	159	int i;
7c673cae	160
11fdf7f2 TL	161	for (i = 0; i < SPDK_SCSI_DEV_MAX_LUN; i++) {
11fdf7f2 TL	162	if (dev->lun[i] == lun) {
7c673cae	163	dev->lun[i] = NULL;
11fdf7f2	164	}
7c673cae	165
7c673cae	166	if (dev->lun[i]) {
11fdf7f2	167	lun_cnt++;
7c673cae FG	168	}
7c673cae FG	169	}
11fdf7f2 TL	170
	171	if (dev->removed == true && lun_cnt == 0) {
	172	free_dev(dev);
	173	}
7c673cae FG	174	}
	175
	176	/* This typedef exists to work around an astyle 2.05 bug.
	177	* Remove it when astyle is fixed.
11fdf7f2	178	*/
7c673cae FG	179	typedef struct spdk_scsi_dev _spdk_scsi_dev;
	180
	181	_spdk_scsi_dev *
11fdf7f2 TL	182	spdk_scsi_dev_construct(const char name, const char bdev_name_list[],
	183	int *lun_id_list, int num_luns, uint8_t protocol_id,
	184	void (hotremove_cb)(const struct spdk_scsi_lun , void *),
	185	void *hotremove_ctx)
7c673cae FG	186	{
7c673cae FG	187	struct spdk_scsi_dev *dev;
11fdf7f2 TL	188	size_t name_len;
11fdf7f2 TL	189	bool found_lun_0;
7c673cae FG	190	int i, rc;
7c673cae FG	191
11fdf7f2 TL	192	name_len = strlen(name);
	193	if (name_len > sizeof(dev->name) - 1) {
	194	SPDK_ERRLOG("device %s: name longer than maximum allowed length %zu\n",
	195	name, sizeof(dev->name) - 1);
	196	return NULL;
	197	}
	198
7c673cae FG	199	if (num_luns == 0) {
	200	SPDK_ERRLOG("device %s: no LUNs specified\n", name);
	201	return NULL;
	202	}
	203
11fdf7f2 TL	204	found_lun_0 = false;
	205	for (i = 0; i < num_luns; i++) {
	206	if (lun_id_list[i] == 0) {
	207	found_lun_0 = true;
	208	break;
	209	}
	210	}
	211
	212	if (!found_lun_0) {
7c673cae FG	213	SPDK_ERRLOG("device %s: no LUN 0 specified\n", name);
	214	return NULL;
	215	}
	216
	217	for (i = 0; i < num_luns; i++) {
11fdf7f2	218	if (bdev_name_list[i] == NULL) {
7c673cae FG	219	SPDK_ERRLOG("NULL spdk_scsi_lun for LUN %d\n",
	220	lun_id_list[i]);
	221	return NULL;
	222	}
	223	}
	224
	225	dev = allocate_dev();
	226	if (dev == NULL) {
	227	return NULL;
	228	}
	229
11fdf7f2	230	memcpy(dev->name, name, name_len + 1);
7c673cae FG	231
7c673cae FG	232	dev->num_ports = 0;
11fdf7f2	233	dev->protocol_id = protocol_id;
7c673cae FG	234
7c673cae FG	235	for (i = 0; i < num_luns; i++) {
11fdf7f2 TL	236	rc = spdk_scsi_dev_add_lun(dev, bdev_name_list[i], lun_id_list[i],
11fdf7f2 TL	237	hotremove_cb, hotremove_ctx);
7c673cae	238	if (rc < 0) {
11fdf7f2 TL	239	spdk_scsi_dev_destruct(dev);
11fdf7f2 TL	240	return NULL;
7c673cae FG	241	}
	242	}
	243
	244	return dev;
7c673cae FG	245	}
	246
	247	void
	248	spdk_scsi_dev_queue_mgmt_task(struct spdk_scsi_dev *dev,
11fdf7f2 TL	249	struct spdk_scsi_task *task,
11fdf7f2 TL	250	enum spdk_scsi_task_func func)
7c673cae FG	251	{
	252	assert(task != NULL);
	253
11fdf7f2 TL	254	task->function = func;
11fdf7f2 TL	255	spdk_scsi_lun_task_mgmt_execute(task, func);
7c673cae FG	256	}
	257
	258	void
	259	spdk_scsi_dev_queue_task(struct spdk_scsi_dev *dev,
	260	struct spdk_scsi_task *task)
	261	{
	262	assert(task != NULL);
	263
11fdf7f2 TL	264	spdk_scsi_lun_execute_task(task->lun, task);
	265	}
	266
	267	static struct spdk_scsi_port *
	268	spdk_scsi_dev_find_free_port(struct spdk_scsi_dev *dev)
	269	{
	270	int i;
	271
	272	for (i = 0; i < SPDK_SCSI_DEV_MAX_PORTS; i++) {
	273	if (!dev->port[i].is_used) {
	274	return &dev->port[i];
	275	}
7c673cae	276	}
11fdf7f2 TL	277
11fdf7f2 TL	278	return NULL;
7c673cae FG	279	}
	280
	281	int
	282	spdk_scsi_dev_add_port(struct spdk_scsi_dev dev, uint64_t id, const char name)
	283	{
	284	struct spdk_scsi_port *port;
	285	int rc;
	286
	287	if (dev->num_ports == SPDK_SCSI_DEV_MAX_PORTS) {
	288	SPDK_ERRLOG("device already has %d ports\n", SPDK_SCSI_DEV_MAX_PORTS);
	289	return -1;
	290	}
	291
11fdf7f2 TL	292	port = spdk_scsi_dev_find_port_by_id(dev, id);
	293	if (port != NULL) {
	294	SPDK_ERRLOG("device already has port(%" PRIu64 ")\n", id);
	295	return -1;
	296	}
	297
	298	port = spdk_scsi_dev_find_free_port(dev);
	299	if (port == NULL) {
	300	assert(false);
	301	return -1;
	302	}
7c673cae FG	303
	304	rc = spdk_scsi_port_construct(port, id, dev->num_ports, name);
	305	if (rc != 0) {
	306	return rc;
	307	}
	308
	309	dev->num_ports++;
	310	return 0;
	311	}
	312
11fdf7f2 TL	313	int
	314	spdk_scsi_dev_delete_port(struct spdk_scsi_dev *dev, uint64_t id)
	315	{
	316	struct spdk_scsi_port *port;
	317
	318	port = spdk_scsi_dev_find_port_by_id(dev, id);
	319	if (port == NULL) {
	320	SPDK_ERRLOG("device does not have specified port(%" PRIu64 ")\n", id);
	321	return -1;
	322	}
	323
	324	spdk_scsi_port_destruct(port);
	325
	326	dev->num_ports--;
	327
	328	return 0;
	329	}
	330
7c673cae FG	331	struct spdk_scsi_port *
	332	spdk_scsi_dev_find_port_by_id(struct spdk_scsi_dev *dev, uint64_t id)
	333	{
	334	int i;
	335
11fdf7f2 TL	336	for (i = 0; i < SPDK_SCSI_DEV_MAX_PORTS; i++) {
	337	if (!dev->port[i].is_used) {
	338	continue;
	339	}
7c673cae FG	340	if (dev->port[i].id == id) {
	341	return &dev->port[i];
	342	}
	343	}
	344
	345	/* No matching port found. */
	346	return NULL;
	347	}
	348
7c673cae FG	349	void
	350	spdk_scsi_dev_free_io_channels(struct spdk_scsi_dev *dev)
	351	{
	352	int i;
	353
	354	for (i = 0; i < SPDK_SCSI_DEV_MAX_LUN; i++) {
	355	if (dev->lun[i] == NULL) {
	356	continue;
	357	}
11fdf7f2	358	_spdk_scsi_lun_free_io_channel(dev->lun[i]);
7c673cae FG	359	}
	360	}
	361
	362	int
	363	spdk_scsi_dev_allocate_io_channels(struct spdk_scsi_dev *dev)
	364	{
	365	int i, rc;
	366
	367	for (i = 0; i < SPDK_SCSI_DEV_MAX_LUN; i++) {
	368	if (dev->lun[i] == NULL) {
	369	continue;
	370	}
11fdf7f2	371	rc = _spdk_scsi_lun_allocate_io_channel(dev->lun[i]);
7c673cae FG	372	if (rc < 0) {
	373	spdk_scsi_dev_free_io_channels(dev);
	374	return -1;
	375	}
	376	}
	377
	378	return 0;
	379	}
11fdf7f2 TL	380
	381	const char *
	382	spdk_scsi_dev_get_name(const struct spdk_scsi_dev *dev)
	383	{
	384	return dev->name;
	385	}
	386
	387	int
	388	spdk_scsi_dev_get_id(const struct spdk_scsi_dev *dev)
	389	{
	390	return dev->id;
	391	}
	392
	393	struct spdk_scsi_lun *
	394	spdk_scsi_dev_get_lun(struct spdk_scsi_dev *dev, int lun_id)
	395	{
	396	if (lun_id < 0 \|\| lun_id >= SPDK_SCSI_DEV_MAX_LUN) {
	397	return NULL;
	398	}
	399
	400	return dev->lun[lun_id];
	401	}
	402
	403	bool
	404	spdk_scsi_dev_has_pending_tasks(const struct spdk_scsi_dev *dev)
	405	{
	406	int i;
	407
	408	for (i = 0; i < SPDK_SCSI_DEV_MAX_LUN; ++i) {
	409	if (dev->lun[i] && spdk_scsi_lun_has_pending_tasks(dev->lun[i])) {
	410	return true;
	411	}
	412	}
	413
	414	return false;
	415	}