1 /*******************************************************************************
2 * Filename: target_core_tpg.c
4 * This file contains generic Target Portal Group related functions.
6 * (c) Copyright 2002-2013 Datera, Inc.
8 * Nicholas A. Bellinger <nab@kernel.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 ******************************************************************************/
26 #include <linux/net.h>
27 #include <linux/string.h>
28 #include <linux/timer.h>
29 #include <linux/slab.h>
30 #include <linux/spinlock.h>
32 #include <linux/export.h>
35 #include <scsi/scsi_proto.h>
37 #include <target/target_core_base.h>
38 #include <target/target_core_backend.h>
39 #include <target/target_core_fabric.h>
41 #include "target_core_internal.h"
42 #include "target_core_alua.h"
43 #include "target_core_pr.h"
44 #include "target_core_ua.h"
46 extern struct se_device
*g_lun0_dev
;
48 static DEFINE_SPINLOCK(tpg_lock
);
49 static LIST_HEAD(tpg_list
);
51 /* __core_tpg_get_initiator_node_acl():
53 * mutex_lock(&tpg->acl_node_mutex); must be held when calling
55 struct se_node_acl
*__core_tpg_get_initiator_node_acl(
56 struct se_portal_group
*tpg
,
57 const char *initiatorname
)
59 struct se_node_acl
*acl
;
61 list_for_each_entry(acl
, &tpg
->acl_node_list
, acl_list
) {
62 if (!strcmp(acl
->initiatorname
, initiatorname
))
69 /* core_tpg_get_initiator_node_acl():
73 struct se_node_acl
*core_tpg_get_initiator_node_acl(
74 struct se_portal_group
*tpg
,
75 unsigned char *initiatorname
)
77 struct se_node_acl
*acl
;
79 * Obtain se_node_acl->acl_kref using fabric driver provided
80 * initiatorname[] during node acl endpoint lookup driven by
81 * new se_session login.
83 * The reference is held until se_session shutdown -> release
84 * occurs via fabric driver invoked transport_deregister_session()
85 * or transport_free_session() code.
87 mutex_lock(&tpg
->acl_node_mutex
);
88 acl
= __core_tpg_get_initiator_node_acl(tpg
, initiatorname
);
90 if (!kref_get_unless_zero(&acl
->acl_kref
))
93 mutex_unlock(&tpg
->acl_node_mutex
);
97 EXPORT_SYMBOL(core_tpg_get_initiator_node_acl
);
99 void core_allocate_nexus_loss_ua(
100 struct se_node_acl
*nacl
)
102 struct se_dev_entry
*deve
;
108 hlist_for_each_entry_rcu(deve
, &nacl
->lun_entry_hlist
, link
)
109 core_scsi3_ua_allocate(deve
, 0x29,
110 ASCQ_29H_NEXUS_LOSS_OCCURRED
);
113 EXPORT_SYMBOL(core_allocate_nexus_loss_ua
);
115 /* core_tpg_add_node_to_devs():
119 void core_tpg_add_node_to_devs(
120 struct se_node_acl
*acl
,
121 struct se_portal_group
*tpg
,
122 struct se_lun
*lun_orig
)
126 struct se_device
*dev
;
128 mutex_lock(&tpg
->tpg_lun_mutex
);
129 hlist_for_each_entry_rcu(lun
, &tpg
->tpg_lun_hlist
, link
) {
130 if (lun_orig
&& lun
!= lun_orig
)
133 dev
= rcu_dereference_check(lun
->lun_se_dev
,
134 lockdep_is_held(&tpg
->tpg_lun_mutex
));
136 * By default in LIO-Target $FABRIC_MOD,
137 * demo_mode_write_protect is ON, or READ_ONLY;
139 if (!tpg
->se_tpg_tfo
->tpg_check_demo_mode_write_protect(tpg
)) {
140 lun_access
= TRANSPORT_LUNFLAGS_READ_WRITE
;
143 * Allow only optical drives to issue R/W in default RO
146 if (dev
->transport
->get_device_type(dev
) == TYPE_DISK
)
147 lun_access
= TRANSPORT_LUNFLAGS_READ_ONLY
;
149 lun_access
= TRANSPORT_LUNFLAGS_READ_WRITE
;
152 pr_debug("TARGET_CORE[%s]->TPG[%u]_LUN[%llu] - Adding %s"
153 " access for LUN in Demo Mode\n",
154 tpg
->se_tpg_tfo
->get_fabric_name(),
155 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
), lun
->unpacked_lun
,
156 (lun_access
== TRANSPORT_LUNFLAGS_READ_WRITE
) ?
157 "READ-WRITE" : "READ-ONLY");
159 core_enable_device_list_for_node(lun
, NULL
, lun
->unpacked_lun
,
160 lun_access
, acl
, tpg
);
162 * Check to see if there are any existing persistent reservation
163 * APTPL pre-registrations that need to be enabled for this dynamic
166 core_scsi3_check_aptpl_registration(dev
, tpg
, lun
, acl
,
169 mutex_unlock(&tpg
->tpg_lun_mutex
);
173 target_set_nacl_queue_depth(struct se_portal_group
*tpg
,
174 struct se_node_acl
*acl
, u32 queue_depth
)
176 acl
->queue_depth
= queue_depth
;
178 if (!acl
->queue_depth
) {
179 pr_warn("Queue depth for %s Initiator Node: %s is 0,"
180 "defaulting to 1.\n", tpg
->se_tpg_tfo
->get_fabric_name(),
182 acl
->queue_depth
= 1;
186 static struct se_node_acl
*target_alloc_node_acl(struct se_portal_group
*tpg
,
187 const unsigned char *initiatorname
)
189 struct se_node_acl
*acl
;
192 acl
= kzalloc(max(sizeof(*acl
), tpg
->se_tpg_tfo
->node_acl_size
),
197 INIT_LIST_HEAD(&acl
->acl_list
);
198 INIT_LIST_HEAD(&acl
->acl_sess_list
);
199 INIT_HLIST_HEAD(&acl
->lun_entry_hlist
);
200 kref_init(&acl
->acl_kref
);
201 init_completion(&acl
->acl_free_comp
);
202 spin_lock_init(&acl
->nacl_sess_lock
);
203 mutex_init(&acl
->lun_entry_mutex
);
204 atomic_set(&acl
->acl_pr_ref_count
, 0);
206 if (tpg
->se_tpg_tfo
->tpg_get_default_depth
)
207 queue_depth
= tpg
->se_tpg_tfo
->tpg_get_default_depth(tpg
);
210 target_set_nacl_queue_depth(tpg
, acl
, queue_depth
);
212 snprintf(acl
->initiatorname
, TRANSPORT_IQN_LEN
, "%s", initiatorname
);
214 acl
->acl_index
= scsi_get_new_index(SCSI_AUTH_INTR_INDEX
);
216 tpg
->se_tpg_tfo
->set_default_node_attributes(acl
);
221 static void target_add_node_acl(struct se_node_acl
*acl
)
223 struct se_portal_group
*tpg
= acl
->se_tpg
;
225 mutex_lock(&tpg
->acl_node_mutex
);
226 list_add_tail(&acl
->acl_list
, &tpg
->acl_node_list
);
227 mutex_unlock(&tpg
->acl_node_mutex
);
229 pr_debug("%s_TPG[%hu] - Added %s ACL with TCQ Depth: %d for %s"
230 " Initiator Node: %s\n",
231 tpg
->se_tpg_tfo
->get_fabric_name(),
232 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
),
233 acl
->dynamic_node_acl
? "DYNAMIC" : "",
235 tpg
->se_tpg_tfo
->get_fabric_name(),
239 bool target_tpg_has_node_acl(struct se_portal_group
*tpg
,
240 const char *initiatorname
)
242 struct se_node_acl
*acl
;
245 mutex_lock(&tpg
->acl_node_mutex
);
246 list_for_each_entry(acl
, &tpg
->acl_node_list
, acl_list
) {
247 if (!strcmp(acl
->initiatorname
, initiatorname
)) {
252 mutex_unlock(&tpg
->acl_node_mutex
);
256 EXPORT_SYMBOL(target_tpg_has_node_acl
);
258 struct se_node_acl
*core_tpg_check_initiator_node_acl(
259 struct se_portal_group
*tpg
,
260 unsigned char *initiatorname
)
262 struct se_node_acl
*acl
;
264 acl
= core_tpg_get_initiator_node_acl(tpg
, initiatorname
);
268 if (!tpg
->se_tpg_tfo
->tpg_check_demo_mode(tpg
))
271 acl
= target_alloc_node_acl(tpg
, initiatorname
);
275 * When allocating a dynamically generated node_acl, go ahead
276 * and take the extra kref now before returning to the fabric
279 * Note this reference will be released at session shutdown
280 * time within transport_free_session() code.
282 kref_get(&acl
->acl_kref
);
283 acl
->dynamic_node_acl
= 1;
286 * Here we only create demo-mode MappedLUNs from the active
287 * TPG LUNs if the fabric is not explicitly asking for
288 * tpg_check_demo_mode_login_only() == 1.
290 if ((tpg
->se_tpg_tfo
->tpg_check_demo_mode_login_only
== NULL
) ||
291 (tpg
->se_tpg_tfo
->tpg_check_demo_mode_login_only(tpg
) != 1))
292 core_tpg_add_node_to_devs(acl
, tpg
, NULL
);
294 target_add_node_acl(acl
);
297 EXPORT_SYMBOL(core_tpg_check_initiator_node_acl
);
299 void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl
*nacl
)
301 while (atomic_read(&nacl
->acl_pr_ref_count
) != 0)
305 struct se_node_acl
*core_tpg_add_initiator_node_acl(
306 struct se_portal_group
*tpg
,
307 const char *initiatorname
)
309 struct se_node_acl
*acl
;
311 mutex_lock(&tpg
->acl_node_mutex
);
312 acl
= __core_tpg_get_initiator_node_acl(tpg
, initiatorname
);
314 if (acl
->dynamic_node_acl
) {
315 acl
->dynamic_node_acl
= 0;
316 pr_debug("%s_TPG[%u] - Replacing dynamic ACL"
317 " for %s\n", tpg
->se_tpg_tfo
->get_fabric_name(),
318 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
), initiatorname
);
319 mutex_unlock(&tpg
->acl_node_mutex
);
323 pr_err("ACL entry for %s Initiator"
324 " Node %s already exists for TPG %u, ignoring"
325 " request.\n", tpg
->se_tpg_tfo
->get_fabric_name(),
326 initiatorname
, tpg
->se_tpg_tfo
->tpg_get_tag(tpg
));
327 mutex_unlock(&tpg
->acl_node_mutex
);
328 return ERR_PTR(-EEXIST
);
330 mutex_unlock(&tpg
->acl_node_mutex
);
332 acl
= target_alloc_node_acl(tpg
, initiatorname
);
334 return ERR_PTR(-ENOMEM
);
336 target_add_node_acl(acl
);
340 void core_tpg_del_initiator_node_acl(struct se_node_acl
*acl
)
342 struct se_portal_group
*tpg
= acl
->se_tpg
;
343 LIST_HEAD(sess_list
);
344 struct se_session
*sess
, *sess_tmp
;
348 mutex_lock(&tpg
->acl_node_mutex
);
349 if (acl
->dynamic_node_acl
) {
350 acl
->dynamic_node_acl
= 0;
352 list_del(&acl
->acl_list
);
353 mutex_unlock(&tpg
->acl_node_mutex
);
355 spin_lock_irqsave(&acl
->nacl_sess_lock
, flags
);
358 list_for_each_entry_safe(sess
, sess_tmp
, &acl
->acl_sess_list
,
360 if (sess
->sess_tearing_down
!= 0)
363 if (!target_get_session(sess
))
365 list_move(&sess
->sess_acl_list
, &sess_list
);
367 spin_unlock_irqrestore(&acl
->nacl_sess_lock
, flags
);
369 list_for_each_entry_safe(sess
, sess_tmp
, &sess_list
, sess_acl_list
) {
370 list_del(&sess
->sess_acl_list
);
372 rc
= tpg
->se_tpg_tfo
->shutdown_session(sess
);
373 target_put_session(sess
);
376 target_put_session(sess
);
378 target_put_nacl(acl
);
380 * Wait for last target_put_nacl() to complete in target_complete_nacl()
381 * for active fabric session transport_deregister_session() callbacks.
383 wait_for_completion(&acl
->acl_free_comp
);
385 core_tpg_wait_for_nacl_pr_ref(acl
);
386 core_free_device_list_for_node(acl
, tpg
);
388 pr_debug("%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s"
389 " Initiator Node: %s\n", tpg
->se_tpg_tfo
->get_fabric_name(),
390 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
), acl
->queue_depth
,
391 tpg
->se_tpg_tfo
->get_fabric_name(), acl
->initiatorname
);
396 /* core_tpg_set_initiator_node_queue_depth():
400 int core_tpg_set_initiator_node_queue_depth(
401 struct se_node_acl
*acl
,
404 LIST_HEAD(sess_list
);
405 struct se_portal_group
*tpg
= acl
->se_tpg
;
406 struct se_session
*sess
, *sess_tmp
;
411 * User has requested to change the queue depth for a Initiator Node.
412 * Change the value in the Node's struct se_node_acl, and call
413 * target_set_nacl_queue_depth() to set the new queue depth.
415 target_set_nacl_queue_depth(tpg
, acl
, queue_depth
);
417 spin_lock_irqsave(&acl
->nacl_sess_lock
, flags
);
418 list_for_each_entry_safe(sess
, sess_tmp
, &acl
->acl_sess_list
,
420 if (sess
->sess_tearing_down
!= 0)
422 if (!target_get_session(sess
))
424 spin_unlock_irqrestore(&acl
->nacl_sess_lock
, flags
);
427 * Finally call tpg->se_tpg_tfo->close_session() to force session
428 * reinstatement to occur if there is an active session for the
429 * $FABRIC_MOD Initiator Node in question.
431 rc
= tpg
->se_tpg_tfo
->shutdown_session(sess
);
432 target_put_session(sess
);
434 spin_lock_irqsave(&acl
->nacl_sess_lock
, flags
);
437 target_put_session(sess
);
438 spin_lock_irqsave(&acl
->nacl_sess_lock
, flags
);
440 spin_unlock_irqrestore(&acl
->nacl_sess_lock
, flags
);
442 pr_debug("Successfully changed queue depth to: %d for Initiator"
443 " Node: %s on %s Target Portal Group: %u\n", acl
->queue_depth
,
444 acl
->initiatorname
, tpg
->se_tpg_tfo
->get_fabric_name(),
445 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
));
449 EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth
);
451 /* core_tpg_set_initiator_node_tag():
453 * Initiator nodeacl tags are not used internally, but may be used by
454 * userspace to emulate aliases or groups.
455 * Returns length of newly-set tag or -EINVAL.
457 int core_tpg_set_initiator_node_tag(
458 struct se_portal_group
*tpg
,
459 struct se_node_acl
*acl
,
462 if (strlen(new_tag
) >= MAX_ACL_TAG_SIZE
)
465 if (!strncmp("NULL", new_tag
, 4)) {
466 acl
->acl_tag
[0] = '\0';
470 return snprintf(acl
->acl_tag
, MAX_ACL_TAG_SIZE
, "%s", new_tag
);
472 EXPORT_SYMBOL(core_tpg_set_initiator_node_tag
);
474 static void core_tpg_lun_ref_release(struct percpu_ref
*ref
)
476 struct se_lun
*lun
= container_of(ref
, struct se_lun
, lun_ref
);
478 complete(&lun
->lun_ref_comp
);
481 int core_tpg_register(
482 struct se_wwn
*se_wwn
,
483 struct se_portal_group
*se_tpg
,
491 * For the typical case where core_tpg_register() is called by a
492 * fabric driver from target_core_fabric_ops->fabric_make_tpg()
493 * configfs context, use the original tf_ops pointer already saved
494 * by target-core in target_fabric_make_wwn().
496 * Otherwise, for special cases like iscsi-target discovery TPGs
497 * the caller is responsible for setting ->se_tpg_tfo ahead of
498 * calling core_tpg_register().
501 se_tpg
->se_tpg_tfo
= se_wwn
->wwn_tf
->tf_ops
;
503 if (!se_tpg
->se_tpg_tfo
) {
504 pr_err("Unable to locate se_tpg->se_tpg_tfo pointer\n");
508 INIT_HLIST_HEAD(&se_tpg
->tpg_lun_hlist
);
509 se_tpg
->proto_id
= proto_id
;
510 se_tpg
->se_tpg_wwn
= se_wwn
;
511 atomic_set(&se_tpg
->tpg_pr_ref_count
, 0);
512 INIT_LIST_HEAD(&se_tpg
->acl_node_list
);
513 INIT_LIST_HEAD(&se_tpg
->se_tpg_node
);
514 INIT_LIST_HEAD(&se_tpg
->tpg_sess_list
);
515 spin_lock_init(&se_tpg
->session_lock
);
516 mutex_init(&se_tpg
->tpg_lun_mutex
);
517 mutex_init(&se_tpg
->acl_node_mutex
);
519 if (se_tpg
->proto_id
>= 0) {
520 se_tpg
->tpg_virt_lun0
= core_tpg_alloc_lun(se_tpg
, 0);
521 if (IS_ERR(se_tpg
->tpg_virt_lun0
))
522 return PTR_ERR(se_tpg
->tpg_virt_lun0
);
524 ret
= core_tpg_add_lun(se_tpg
, se_tpg
->tpg_virt_lun0
,
525 TRANSPORT_LUNFLAGS_READ_ONLY
, g_lun0_dev
);
527 kfree(se_tpg
->tpg_virt_lun0
);
532 spin_lock_bh(&tpg_lock
);
533 list_add_tail(&se_tpg
->se_tpg_node
, &tpg_list
);
534 spin_unlock_bh(&tpg_lock
);
536 pr_debug("TARGET_CORE[%s]: Allocated portal_group for endpoint: %s, "
537 "Proto: %d, Portal Tag: %u\n", se_tpg
->se_tpg_tfo
->get_fabric_name(),
538 se_tpg
->se_tpg_tfo
->tpg_get_wwn(se_tpg
) ?
539 se_tpg
->se_tpg_tfo
->tpg_get_wwn(se_tpg
) : NULL
,
540 se_tpg
->proto_id
, se_tpg
->se_tpg_tfo
->tpg_get_tag(se_tpg
));
544 EXPORT_SYMBOL(core_tpg_register
);
546 int core_tpg_deregister(struct se_portal_group
*se_tpg
)
548 const struct target_core_fabric_ops
*tfo
= se_tpg
->se_tpg_tfo
;
549 struct se_node_acl
*nacl
, *nacl_tmp
;
550 LIST_HEAD(node_list
);
552 pr_debug("TARGET_CORE[%s]: Deallocating portal_group for endpoint: %s, "
553 "Proto: %d, Portal Tag: %u\n", tfo
->get_fabric_name(),
554 tfo
->tpg_get_wwn(se_tpg
) ? tfo
->tpg_get_wwn(se_tpg
) : NULL
,
555 se_tpg
->proto_id
, tfo
->tpg_get_tag(se_tpg
));
557 spin_lock_bh(&tpg_lock
);
558 list_del(&se_tpg
->se_tpg_node
);
559 spin_unlock_bh(&tpg_lock
);
561 while (atomic_read(&se_tpg
->tpg_pr_ref_count
) != 0)
564 mutex_lock(&se_tpg
->acl_node_mutex
);
565 list_splice_init(&se_tpg
->acl_node_list
, &node_list
);
566 mutex_unlock(&se_tpg
->acl_node_mutex
);
568 * Release any remaining demo-mode generated se_node_acl that have
569 * not been released because of TFO->tpg_check_demo_mode_cache() == 1
570 * in transport_deregister_session().
572 list_for_each_entry_safe(nacl
, nacl_tmp
, &node_list
, acl_list
) {
573 list_del(&nacl
->acl_list
);
575 core_tpg_wait_for_nacl_pr_ref(nacl
);
576 core_free_device_list_for_node(nacl
, se_tpg
);
580 if (se_tpg
->proto_id
>= 0) {
581 core_tpg_remove_lun(se_tpg
, se_tpg
->tpg_virt_lun0
);
582 kfree_rcu(se_tpg
->tpg_virt_lun0
, rcu_head
);
587 EXPORT_SYMBOL(core_tpg_deregister
);
589 struct se_lun
*core_tpg_alloc_lun(
590 struct se_portal_group
*tpg
,
595 lun
= kzalloc(sizeof(*lun
), GFP_KERNEL
);
597 pr_err("Unable to allocate se_lun memory\n");
598 return ERR_PTR(-ENOMEM
);
600 lun
->unpacked_lun
= unpacked_lun
;
601 lun
->lun_link_magic
= SE_LUN_LINK_MAGIC
;
602 atomic_set(&lun
->lun_acl_count
, 0);
603 init_completion(&lun
->lun_ref_comp
);
604 INIT_LIST_HEAD(&lun
->lun_deve_list
);
605 INIT_LIST_HEAD(&lun
->lun_dev_link
);
606 atomic_set(&lun
->lun_tg_pt_secondary_offline
, 0);
607 spin_lock_init(&lun
->lun_deve_lock
);
608 mutex_init(&lun
->lun_tg_pt_md_mutex
);
609 INIT_LIST_HEAD(&lun
->lun_tg_pt_gp_link
);
610 spin_lock_init(&lun
->lun_tg_pt_gp_lock
);
616 int core_tpg_add_lun(
617 struct se_portal_group
*tpg
,
620 struct se_device
*dev
)
624 ret
= percpu_ref_init(&lun
->lun_ref
, core_tpg_lun_ref_release
, 0,
629 ret
= core_alloc_rtpi(lun
, dev
);
633 if (!(dev
->transport
->transport_flags
& TRANSPORT_FLAG_PASSTHROUGH
) &&
634 !(dev
->se_hba
->hba_flags
& HBA_FLAGS_INTERNAL_USE
))
635 target_attach_tg_pt_gp(lun
, dev
->t10_alua
.default_tg_pt_gp
);
637 mutex_lock(&tpg
->tpg_lun_mutex
);
639 spin_lock(&dev
->se_port_lock
);
640 lun
->lun_index
= dev
->dev_index
;
641 rcu_assign_pointer(lun
->lun_se_dev
, dev
);
643 list_add_tail(&lun
->lun_dev_link
, &dev
->dev_sep_list
);
644 spin_unlock(&dev
->se_port_lock
);
646 if (dev
->dev_flags
& DF_READ_ONLY
)
647 lun
->lun_access
= TRANSPORT_LUNFLAGS_READ_ONLY
;
649 lun
->lun_access
= lun_access
;
650 if (!(dev
->se_hba
->hba_flags
& HBA_FLAGS_INTERNAL_USE
))
651 hlist_add_head_rcu(&lun
->link
, &tpg
->tpg_lun_hlist
);
652 mutex_unlock(&tpg
->tpg_lun_mutex
);
657 percpu_ref_exit(&lun
->lun_ref
);
662 void core_tpg_remove_lun(
663 struct se_portal_group
*tpg
,
667 * rcu_dereference_raw protected by se_lun->lun_group symlink
668 * reference to se_device->dev_group.
670 struct se_device
*dev
= rcu_dereference_raw(lun
->lun_se_dev
);
672 core_clear_lun_from_tpg(lun
, tpg
);
674 * Wait for any active I/O references to percpu se_lun->lun_ref to
675 * be released. Also, se_lun->lun_ref is now used by PR and ALUA
676 * logic when referencing a remote target port during ALL_TGT_PT=1
677 * and generating UNIT_ATTENTIONs for ALUA access state transition.
679 transport_clear_lun_ref(lun
);
681 mutex_lock(&tpg
->tpg_lun_mutex
);
682 if (lun
->lun_se_dev
) {
683 target_detach_tg_pt_gp(lun
);
685 spin_lock(&dev
->se_port_lock
);
686 list_del(&lun
->lun_dev_link
);
688 rcu_assign_pointer(lun
->lun_se_dev
, NULL
);
689 spin_unlock(&dev
->se_port_lock
);
691 if (!(dev
->se_hba
->hba_flags
& HBA_FLAGS_INTERNAL_USE
))
692 hlist_del_rcu(&lun
->link
);
693 mutex_unlock(&tpg
->tpg_lun_mutex
);
695 percpu_ref_exit(&lun
->lun_ref
);