[mirror_ubuntu-hirsute-kernel.git] / drivers / target / target_core_ua.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*******************************************************************************
 * Filename: target_core_ua.c
 *
 * This file contains logic for SPC-3 Unit Attention emulation
 *
 * (c) Copyright 2009-2013 Datera, Inc.
 *
 * Nicholas A. Bellinger <nab@kernel.org>
 *
 ******************************************************************************/

#include <linux/slab.h>
#include <linux/spinlock.h>
#include <scsi/scsi_proto.h>

#include <target/target_core_base.h>
#include <target/target_core_fabric.h>

#include "target_core_internal.h"
#include "target_core_alua.h"
#include "target_core_pr.h"
#include "target_core_ua.h"

sense_reason_t
target_scsi3_ua_check(struct se_cmd *cmd)
{
	struct se_dev_entry *deve;
	struct se_session *sess = cmd->se_sess;
	struct se_node_acl *nacl;

	if (!sess)
		return 0;

	nacl = sess->se_node_acl;
	if (!nacl)
		return 0;

	rcu_read_lock();
	deve = target_nacl_find_deve(nacl, cmd->orig_fe_lun);
	if (!deve) {
		rcu_read_unlock();
		return 0;
	}
	if (list_empty_careful(&deve->ua_list)) {
		rcu_read_unlock();
		return 0;
	}
	rcu_read_unlock();
	/*
	 * From sam4r14, section 5.14 Unit attention condition:
	 *
	 * a) if an INQUIRY command enters the enabled command state, the
	 *    device server shall process the INQUIRY command and shall neither
	 *    report nor clear any unit attention condition;
	 * b) if a REPORT LUNS command enters the enabled command state, the
	 *    device server shall process the REPORT LUNS command and shall not
	 *    report any unit attention condition;
	 * e) if a REQUEST SENSE command enters the enabled command state while
	 *    a unit attention condition exists for the SCSI initiator port
	 *    associated with the I_T nexus on which the REQUEST SENSE command
	 *    was received, then the device server shall process the command
	 *    and either:
	 */
	switch (cmd->t_task_cdb[0]) {
	case INQUIRY:
	case REPORT_LUNS:
	case REQUEST_SENSE:
		return 0;
	default:
		return TCM_CHECK_CONDITION_UNIT_ATTENTION;
	}
}

int core_scsi3_ua_allocate(
	struct se_dev_entry *deve,
	u8 asc,
	u8 ascq)
{
	struct se_ua *ua, *ua_p, *ua_tmp;

	ua = kmem_cache_zalloc(se_ua_cache, GFP_ATOMIC);
	if (!ua) {
		pr_err("Unable to allocate struct se_ua\n");
		return -ENOMEM;
	}
	INIT_LIST_HEAD(&ua->ua_nacl_list);

	ua->ua_asc = asc;
	ua->ua_ascq = ascq;

	spin_lock(&deve->ua_lock);
	list_for_each_entry_safe(ua_p, ua_tmp, &deve->ua_list, ua_nacl_list) {
		/*
		 * Do not report the same UNIT ATTENTION twice..
		 */
		if ((ua_p->ua_asc == asc) && (ua_p->ua_ascq == ascq)) {
			spin_unlock(&deve->ua_lock);
			kmem_cache_free(se_ua_cache, ua);
			return 0;
		}
		/*
		 * Attach the highest priority Unit Attention to
		 * the head of the list following sam4r14,
		 * Section 5.14 Unit Attention Condition:
		 *
		 * POWER ON, RESET, OR BUS DEVICE RESET OCCURRED highest
		 * POWER ON OCCURRED or
		 * DEVICE INTERNAL RESET
		 * SCSI BUS RESET OCCURRED or
		 * MICROCODE HAS BEEN CHANGED or
		 * protocol specific
		 * BUS DEVICE RESET FUNCTION OCCURRED
		 * I_T NEXUS LOSS OCCURRED
		 * COMMANDS CLEARED BY POWER LOSS NOTIFICATION
		 * all others                                    Lowest
		 *
		 * Each of the ASCQ codes listed above are defined in
		 * the 29h ASC family, see spc4r17 Table D.1
		 */
		if (ua_p->ua_asc == 0x29) {
			if ((asc == 0x29) && (ascq > ua_p->ua_ascq))
				list_add(&ua->ua_nacl_list,
						&deve->ua_list);
			else
				list_add_tail(&ua->ua_nacl_list,
						&deve->ua_list);
		} else if (ua_p->ua_asc == 0x2a) {
			/*
			 * Incoming Family 29h ASCQ codes will override
			 * Family 2AHh ASCQ codes for Unit Attention condition.
			 */
			if ((asc == 0x29) || (ascq > ua_p->ua_asc))
				list_add(&ua->ua_nacl_list,
					&deve->ua_list);
			else
				list_add_tail(&ua->ua_nacl_list,
						&deve->ua_list);
		} else
			list_add_tail(&ua->ua_nacl_list,
				&deve->ua_list);
		spin_unlock(&deve->ua_lock);

		return 0;
	}
	list_add_tail(&ua->ua_nacl_list, &deve->ua_list);
	spin_unlock(&deve->ua_lock);

	pr_debug("Allocated UNIT ATTENTION, mapped LUN: %llu, ASC:"
		" 0x%02x, ASCQ: 0x%02x\n", deve->mapped_lun,
		asc, ascq);

	return 0;
}

void target_ua_allocate_lun(struct se_node_acl *nacl,
			    u32 unpacked_lun, u8 asc, u8 ascq)
{
	struct se_dev_entry *deve;

	if (!nacl)
		return;

	rcu_read_lock();
	deve = target_nacl_find_deve(nacl, unpacked_lun);
	if (!deve) {
		rcu_read_unlock();
		return;
	}

	core_scsi3_ua_allocate(deve, asc, ascq);
	rcu_read_unlock();
}

void core_scsi3_ua_release_all(
	struct se_dev_entry *deve)
{
	struct se_ua *ua, *ua_p;

	spin_lock(&deve->ua_lock);
	list_for_each_entry_safe(ua, ua_p, &deve->ua_list, ua_nacl_list) {
		list_del(&ua->ua_nacl_list);
		kmem_cache_free(se_ua_cache, ua);
	}
	spin_unlock(&deve->ua_lock);
}

/*
 * Dequeue a unit attention from the unit attention list. This function
 * returns true if the dequeuing succeeded and if *@key, *@asc and *@ascq have
 * been set.
 */
bool core_scsi3_ua_for_check_condition(struct se_cmd *cmd, u8 *key, u8 *asc,
				       u8 *ascq)
{
	struct se_device *dev = cmd->se_dev;
	struct se_dev_entry *deve;
	struct se_session *sess = cmd->se_sess;
	struct se_node_acl *nacl;
	struct se_ua *ua = NULL, *ua_p;
	int head = 1;

	if (WARN_ON_ONCE(!sess))
		return false;

	nacl = sess->se_node_acl;
	if (WARN_ON_ONCE(!nacl))
		return false;

	rcu_read_lock();
	deve = target_nacl_find_deve(nacl, cmd->orig_fe_lun);
	if (!deve) {
		rcu_read_unlock();
		*key = ILLEGAL_REQUEST;
		*asc = 0x25; /* LOGICAL UNIT NOT SUPPORTED */
		*ascq = 0;
		return true;
	}
	*key = UNIT_ATTENTION;
	/*
	 * The highest priority Unit Attentions are placed at the head of the
	 * struct se_dev_entry->ua_list, and will be returned in CHECK_CONDITION +
	 * sense data for the received CDB.
	 */
	spin_lock(&deve->ua_lock);
	list_for_each_entry_safe(ua, ua_p, &deve->ua_list, ua_nacl_list) {
		/*
		 * For ua_intlck_ctrl code not equal to 00b, only report the
		 * highest priority UNIT_ATTENTION and ASC/ASCQ without
		 * clearing it.
		 */
		if (dev->dev_attrib.emulate_ua_intlck_ctrl != 0) {
			*asc = ua->ua_asc;
			*ascq = ua->ua_ascq;
			break;
		}
		/*
		 * Otherwise for the default 00b, release the UNIT ATTENTION
		 * condition.  Return the ASC/ASCQ of the highest priority UA
		 * (head of the list) in the outgoing CHECK_CONDITION + sense.
		 */
		if (head) {
			*asc = ua->ua_asc;
			*ascq = ua->ua_ascq;
			head = 0;
		}
		list_del(&ua->ua_nacl_list);
		kmem_cache_free(se_ua_cache, ua);
	}
	spin_unlock(&deve->ua_lock);
	rcu_read_unlock();

	pr_debug("[%s]: %s UNIT ATTENTION condition with"
		" INTLCK_CTRL: %d, mapped LUN: %llu, got CDB: 0x%02x"
		" reported ASC: 0x%02x, ASCQ: 0x%02x\n",
		nacl->se_tpg->se_tpg_tfo->fabric_name,
		(dev->dev_attrib.emulate_ua_intlck_ctrl != 0) ? "Reporting" :
		"Releasing", dev->dev_attrib.emulate_ua_intlck_ctrl,
		cmd->orig_fe_lun, cmd->t_task_cdb[0], *asc, *ascq);

	return head == 0;
}

int core_scsi3_ua_clear_for_request_sense(
	struct se_cmd *cmd,
	u8 *asc,
	u8 *ascq)
{
	struct se_dev_entry *deve;
	struct se_session *sess = cmd->se_sess;
	struct se_node_acl *nacl;
	struct se_ua *ua = NULL, *ua_p;
	int head = 1;

	if (!sess)
		return -EINVAL;

	nacl = sess->se_node_acl;
	if (!nacl)
		return -EINVAL;

	rcu_read_lock();
	deve = target_nacl_find_deve(nacl, cmd->orig_fe_lun);
	if (!deve) {
		rcu_read_unlock();
		return -EINVAL;
	}
	if (list_empty_careful(&deve->ua_list)) {
		rcu_read_unlock();
		return -EPERM;
	}
	/*
	 * The highest priority Unit Attentions are placed at the head of the
	 * struct se_dev_entry->ua_list.  The First (and hence highest priority)
	 * ASC/ASCQ will be returned in REQUEST_SENSE payload data for the
	 * matching struct se_lun.
	 *
	 * Once the returning ASC/ASCQ values are set, we go ahead and
	 * release all of the Unit Attention conditions for the associated
	 * struct se_lun.
	 */
	spin_lock(&deve->ua_lock);
	list_for_each_entry_safe(ua, ua_p, &deve->ua_list, ua_nacl_list) {
		if (head) {
			*asc = ua->ua_asc;
			*ascq = ua->ua_ascq;
			head = 0;
		}
		list_del(&ua->ua_nacl_list);
		kmem_cache_free(se_ua_cache, ua);
	}
	spin_unlock(&deve->ua_lock);
	rcu_read_unlock();

	pr_debug("[%s]: Released UNIT ATTENTION condition, mapped"
		" LUN: %llu, got REQUEST_SENSE reported ASC: 0x%02x,"
		" ASCQ: 0x%02x\n", nacl->se_tpg->se_tpg_tfo->fabric_name,
		cmd->orig_fe_lun, *asc, *ascq);

	return (head) ? -EPERM : 0;
}
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
c66ac9db NB	2	/*******************************************************************************
	3	* Filename: target_core_ua.c
	4	*
	5	* This file contains logic for SPC-3 Unit Attention emulation
	6	*
4c76251e	7	* (c) Copyright 2009-2013 Datera, Inc.
c66ac9db NB	8	*
	9	* Nicholas A. Bellinger <nab@kernel.org>
	10	*
c66ac9db NB	11	******************************************************************************/
c66ac9db NB	12
c66ac9db NB	13	#include <linux/slab.h>
c66ac9db NB	14	#include <linux/spinlock.h>
ba929992	15	#include <scsi/scsi_proto.h>
c66ac9db NB	16
c66ac9db NB	17	#include <target/target_core_base.h>
c4795fb2	18	#include <target/target_core_fabric.h>
c66ac9db	19
e26d99ae	20	#include "target_core_internal.h"
c66ac9db	21	#include "target_core_alua.h"
c66ac9db NB	22	#include "target_core_pr.h"
	23	#include "target_core_ua.h"
	24
de103c93 CH	25	sense_reason_t
de103c93 CH	26	target_scsi3_ua_check(struct se_cmd *cmd)
c66ac9db NB	27	{
	28	struct se_dev_entry *deve;
	29	struct se_session *sess = cmd->se_sess;
	30	struct se_node_acl *nacl;
	31
6708bb27	32	if (!sess)
c66ac9db NB	33	return 0;
	34
	35	nacl = sess->se_node_acl;
6708bb27	36	if (!nacl)
c66ac9db NB	37	return 0;
c66ac9db NB	38
29a05dee NB	39	rcu_read_lock();
	40	deve = target_nacl_find_deve(nacl, cmd->orig_fe_lun);
	41	if (!deve) {
	42	rcu_read_unlock();
c66ac9db	43	return 0;
29a05dee	44	}
e936a38a	45	if (list_empty_careful(&deve->ua_list)) {
29a05dee NB	46	rcu_read_unlock();
	47	return 0;
	48	}
	49	rcu_read_unlock();
c66ac9db NB	50	/*
	51	* From sam4r14, section 5.14 Unit attention condition:
	52	*
	53	* a) if an INQUIRY command enters the enabled command state, the
	54	* device server shall process the INQUIRY command and shall neither
	55	* report nor clear any unit attention condition;
	56	* b) if a REPORT LUNS command enters the enabled command state, the
	57	* device server shall process the REPORT LUNS command and shall not
	58	* report any unit attention condition;
	59	* e) if a REQUEST SENSE command enters the enabled command state while
	60	* a unit attention condition exists for the SCSI initiator port
	61	* associated with the I_T nexus on which the REQUEST SENSE command
	62	* was received, then the device server shall process the command
	63	* and either:
	64	*/
de103c93	65	switch (cmd->t_task_cdb[0]) {
c66ac9db NB	66	case INQUIRY:
	67	case REPORT_LUNS:
	68	case REQUEST_SENSE:
	69	return 0;
	70	default:
de103c93	71	return TCM_CHECK_CONDITION_UNIT_ATTENTION;
c66ac9db	72	}
c66ac9db NB	73	}
	74
	75	int core_scsi3_ua_allocate(
c51c8e7b	76	struct se_dev_entry *deve,
c66ac9db NB	77	u8 asc,
	78	u8 ascq)
	79	{
c66ac9db	80	struct se_ua ua, ua_p, *ua_tmp;
c66ac9db NB	81
c66ac9db NB	82	ua = kmem_cache_zalloc(se_ua_cache, GFP_ATOMIC);
6708bb27 AG	83	if (!ua) {
6708bb27 AG	84	pr_err("Unable to allocate struct se_ua\n");
e3d6f909	85	return -ENOMEM;
c66ac9db	86	}
c66ac9db NB	87	INIT_LIST_HEAD(&ua->ua_nacl_list);
c66ac9db NB	88
c66ac9db NB	89	ua->ua_asc = asc;
	90	ua->ua_ascq = ascq;
	91
c66ac9db NB	92	spin_lock(&deve->ua_lock);
	93	list_for_each_entry_safe(ua_p, ua_tmp, &deve->ua_list, ua_nacl_list) {
	94	/*
	95	* Do not report the same UNIT ATTENTION twice..
	96	*/
	97	if ((ua_p->ua_asc == asc) && (ua_p->ua_ascq == ascq)) {
	98	spin_unlock(&deve->ua_lock);
c66ac9db NB	99	kmem_cache_free(se_ua_cache, ua);
	100	return 0;
	101	}
	102	/*
	103	* Attach the highest priority Unit Attention to
	104	* the head of the list following sam4r14,
	105	* Section 5.14 Unit Attention Condition:
	106	*
	107	* POWER ON, RESET, OR BUS DEVICE RESET OCCURRED highest
	108	* POWER ON OCCURRED or
	109	* DEVICE INTERNAL RESET
	110	* SCSI BUS RESET OCCURRED or
	111	* MICROCODE HAS BEEN CHANGED or
	112	* protocol specific
	113	* BUS DEVICE RESET FUNCTION OCCURRED
	114	* I_T NEXUS LOSS OCCURRED
	115	* COMMANDS CLEARED BY POWER LOSS NOTIFICATION
	116	* all others Lowest
	117	*
	118	* Each of the ASCQ codes listed above are defined in
	119	* the 29h ASC family, see spc4r17 Table D.1
	120	*/
	121	if (ua_p->ua_asc == 0x29) {
	122	if ((asc == 0x29) && (ascq > ua_p->ua_ascq))
	123	list_add(&ua->ua_nacl_list,
	124	&deve->ua_list);
	125	else
	126	list_add_tail(&ua->ua_nacl_list,
	127	&deve->ua_list);
	128	} else if (ua_p->ua_asc == 0x2a) {
	129	/*
	130	* Incoming Family 29h ASCQ codes will override
	131	* Family 2AHh ASCQ codes for Unit Attention condition.
	132	*/
	133	if ((asc == 0x29) \|\| (ascq > ua_p->ua_asc))
	134	list_add(&ua->ua_nacl_list,
	135	&deve->ua_list);
	136	else
	137	list_add_tail(&ua->ua_nacl_list,
	138	&deve->ua_list);
	139	} else
	140	list_add_tail(&ua->ua_nacl_list,
	141	&deve->ua_list);
	142	spin_unlock(&deve->ua_lock);
c66ac9db	143
c66ac9db NB	144	return 0;
	145	}
	146	list_add_tail(&ua->ua_nacl_list, &deve->ua_list);
	147	spin_unlock(&deve->ua_lock);
c66ac9db	148
c51c8e7b HR	149	pr_debug("Allocated UNIT ATTENTION, mapped LUN: %llu, ASC:"
c51c8e7b HR	150	" 0x%02x, ASCQ: 0x%02x\n", deve->mapped_lun,
c66ac9db NB	151	asc, ascq);
c66ac9db NB	152
c66ac9db NB	153	return 0;
	154	}
	155
c51c8e7b HR	156	void target_ua_allocate_lun(struct se_node_acl *nacl,
	157	u32 unpacked_lun, u8 asc, u8 ascq)
	158	{
	159	struct se_dev_entry *deve;
	160
	161	if (!nacl)
	162	return;
	163
	164	rcu_read_lock();
	165	deve = target_nacl_find_deve(nacl, unpacked_lun);
	166	if (!deve) {
	167	rcu_read_unlock();
	168	return;
	169	}
	170
	171	core_scsi3_ua_allocate(deve, asc, ascq);
	172	rcu_read_unlock();
	173	}
	174
c66ac9db NB	175	void core_scsi3_ua_release_all(
	176	struct se_dev_entry *deve)
	177	{
	178	struct se_ua ua, ua_p;
	179
	180	spin_lock(&deve->ua_lock);
	181	list_for_each_entry_safe(ua, ua_p, &deve->ua_list, ua_nacl_list) {
	182	list_del(&ua->ua_nacl_list);
	183	kmem_cache_free(se_ua_cache, ua);
c66ac9db NB	184	}
	185	spin_unlock(&deve->ua_lock);
	186	}
	187
325c1e8b BVA	188	/*
	189	* Dequeue a unit attention from the unit attention list. This function
	190	* returns true if the dequeuing succeeded and if @key, @asc and *@ascq have
	191	* been set.
	192	*/
	193	bool core_scsi3_ua_for_check_condition(struct se_cmd cmd, u8 key, u8 *asc,
	194	u8 *ascq)
c66ac9db	195	{
5951146d	196	struct se_device *dev = cmd->se_dev;
c66ac9db NB	197	struct se_dev_entry *deve;
	198	struct se_session *sess = cmd->se_sess;
	199	struct se_node_acl *nacl;
	200	struct se_ua ua = NULL, ua_p;
	201	int head = 1;
	202
325c1e8b BVA	203	if (WARN_ON_ONCE(!sess))
325c1e8b BVA	204	return false;
c66ac9db NB	205
c66ac9db NB	206	nacl = sess->se_node_acl;
325c1e8b BVA	207	if (WARN_ON_ONCE(!nacl))
325c1e8b BVA	208	return false;
c66ac9db	209
29a05dee NB	210	rcu_read_lock();
	211	deve = target_nacl_find_deve(nacl, cmd->orig_fe_lun);
	212	if (!deve) {
	213	rcu_read_unlock();
325c1e8b BVA	214	*key = ILLEGAL_REQUEST;
	215	asc = 0x25; / LOGICAL UNIT NOT SUPPORTED */
	216	*ascq = 0;
	217	return true;
c66ac9db	218	}
325c1e8b	219	*key = UNIT_ATTENTION;
c66ac9db NB	220	/*
	221	* The highest priority Unit Attentions are placed at the head of the
	222	* struct se_dev_entry->ua_list, and will be returned in CHECK_CONDITION +
	223	* sense data for the received CDB.
	224	*/
	225	spin_lock(&deve->ua_lock);
	226	list_for_each_entry_safe(ua, ua_p, &deve->ua_list, ua_nacl_list) {
	227	/*
	228	* For ua_intlck_ctrl code not equal to 00b, only report the
	229	* highest priority UNIT_ATTENTION and ASC/ASCQ without
	230	* clearing it.
	231	*/
0fd97ccf	232	if (dev->dev_attrib.emulate_ua_intlck_ctrl != 0) {
c66ac9db NB	233	*asc = ua->ua_asc;
	234	*ascq = ua->ua_ascq;
	235	break;
	236	}
	237	/*
	238	* Otherwise for the default 00b, release the UNIT ATTENTION
25985edc	239	* condition. Return the ASC/ASCQ of the highest priority UA
c66ac9db NB	240	* (head of the list) in the outgoing CHECK_CONDITION + sense.
	241	*/
	242	if (head) {
	243	*asc = ua->ua_asc;
	244	*ascq = ua->ua_ascq;
	245	head = 0;
	246	}
	247	list_del(&ua->ua_nacl_list);
	248	kmem_cache_free(se_ua_cache, ua);
c66ac9db NB	249	}
c66ac9db NB	250	spin_unlock(&deve->ua_lock);
29a05dee	251	rcu_read_unlock();
c66ac9db	252
6708bb27	253	pr_debug("[%s]: %s UNIT ATTENTION condition with"
f2d30680	254	" INTLCK_CTRL: %d, mapped LUN: %llu, got CDB: 0x%02x"
c66ac9db	255	" reported ASC: 0x%02x, ASCQ: 0x%02x\n",
30c7ca93	256	nacl->se_tpg->se_tpg_tfo->fabric_name,
0fd97ccf CH	257	(dev->dev_attrib.emulate_ua_intlck_ctrl != 0) ? "Reporting" :
0fd97ccf CH	258	"Releasing", dev->dev_attrib.emulate_ua_intlck_ctrl,
a1d8b49a	259	cmd->orig_fe_lun, cmd->t_task_cdb[0], asc, ascq);
325c1e8b BVA	260
325c1e8b BVA	261	return head == 0;
c66ac9db NB	262	}
	263
	264	int core_scsi3_ua_clear_for_request_sense(
	265	struct se_cmd *cmd,
	266	u8 *asc,
	267	u8 *ascq)
	268	{
	269	struct se_dev_entry *deve;
	270	struct se_session *sess = cmd->se_sess;
	271	struct se_node_acl *nacl;
	272	struct se_ua ua = NULL, ua_p;
	273	int head = 1;
	274
6708bb27	275	if (!sess)
e3d6f909	276	return -EINVAL;
c66ac9db NB	277
c66ac9db NB	278	nacl = sess->se_node_acl;
6708bb27	279	if (!nacl)
e3d6f909	280	return -EINVAL;
c66ac9db	281
29a05dee NB	282	rcu_read_lock();
	283	deve = target_nacl_find_deve(nacl, cmd->orig_fe_lun);
	284	if (!deve) {
	285	rcu_read_unlock();
	286	return -EINVAL;
	287	}
e936a38a	288	if (list_empty_careful(&deve->ua_list)) {
29a05dee	289	rcu_read_unlock();
e3d6f909	290	return -EPERM;
c66ac9db NB	291	}
	292	/*
	293	* The highest priority Unit Attentions are placed at the head of the
	294	* struct se_dev_entry->ua_list. The First (and hence highest priority)
	295	* ASC/ASCQ will be returned in REQUEST_SENSE payload data for the
	296	* matching struct se_lun.
	297	*
	298	* Once the returning ASC/ASCQ values are set, we go ahead and
25985edc	299	* release all of the Unit Attention conditions for the associated
c66ac9db NB	300	* struct se_lun.
	301	*/
	302	spin_lock(&deve->ua_lock);
	303	list_for_each_entry_safe(ua, ua_p, &deve->ua_list, ua_nacl_list) {
	304	if (head) {
	305	*asc = ua->ua_asc;
	306	*ascq = ua->ua_ascq;
	307	head = 0;
	308	}
	309	list_del(&ua->ua_nacl_list);
	310	kmem_cache_free(se_ua_cache, ua);
c66ac9db NB	311	}
c66ac9db NB	312	spin_unlock(&deve->ua_lock);
29a05dee	313	rcu_read_unlock();
c66ac9db	314
6708bb27	315	pr_debug("[%s]: Released UNIT ATTENTION condition, mapped"
f2d30680	316	" LUN: %llu, got REQUEST_SENSE reported ASC: 0x%02x,"
30c7ca93	317	" ASCQ: 0x%02x\n", nacl->se_tpg->se_tpg_tfo->fabric_name,
c66ac9db NB	318	cmd->orig_fe_lun, asc, ascq);
c66ac9db NB	319
e3d6f909	320	return (head) ? -EPERM : 0;
c66ac9db	321	}