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_pr.h"
44 extern struct se_device *g_lun0_dev;
46 static DEFINE_SPINLOCK(tpg_lock);
47 static LIST_HEAD(tpg_list);
49 /* core_clear_initiator_node_from_tpg():
53 static void core_clear_initiator_node_from_tpg(
54 struct se_node_acl *nacl,
55 struct se_portal_group *tpg)
58 struct se_dev_entry *deve;
61 spin_lock_irq(&nacl->device_list_lock);
62 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
63 deve = nacl->device_list[i];
65 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
69 pr_err("%s device entries device pointer is"
70 " NULL, but Initiator has access.\n",
71 tpg->se_tpg_tfo->get_fabric_name());
76 spin_unlock_irq(&nacl->device_list_lock);
77 core_disable_device_list_for_node(lun, NULL, deve->mapped_lun,
78 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
80 spin_lock_irq(&nacl->device_list_lock);
82 spin_unlock_irq(&nacl->device_list_lock);
85 /* __core_tpg_get_initiator_node_acl():
87 * spin_lock_bh(&tpg->acl_node_lock); must be held when calling
89 struct se_node_acl *__core_tpg_get_initiator_node_acl(
90 struct se_portal_group *tpg,
91 const char *initiatorname)
93 struct se_node_acl *acl;
95 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
96 if (!strcmp(acl->initiatorname, initiatorname))
103 /* core_tpg_get_initiator_node_acl():
107 struct se_node_acl *core_tpg_get_initiator_node_acl(
108 struct se_portal_group *tpg,
109 unsigned char *initiatorname)
111 struct se_node_acl *acl;
113 spin_lock_irq(&tpg->acl_node_lock);
114 acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
115 spin_unlock_irq(&tpg->acl_node_lock);
119 EXPORT_SYMBOL(core_tpg_get_initiator_node_acl);
121 /* core_tpg_add_node_to_devs():
125 void core_tpg_add_node_to_devs(
126 struct se_node_acl *acl,
127 struct se_portal_group *tpg)
132 struct se_device *dev;
134 spin_lock(&tpg->tpg_lun_lock);
135 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
136 lun = tpg->tpg_lun_list[i];
137 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE)
140 spin_unlock(&tpg->tpg_lun_lock);
142 dev = lun->lun_se_dev;
144 * By default in LIO-Target $FABRIC_MOD,
145 * demo_mode_write_protect is ON, or READ_ONLY;
147 if (!tpg->se_tpg_tfo->tpg_check_demo_mode_write_protect(tpg)) {
148 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
151 * Allow only optical drives to issue R/W in default RO
154 if (dev->transport->get_device_type(dev) == TYPE_DISK)
155 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
157 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
160 pr_debug("TARGET_CORE[%s]->TPG[%u]_LUN[%u] - Adding %s"
161 " access for LUN in Demo Mode\n",
162 tpg->se_tpg_tfo->get_fabric_name(),
163 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
164 (lun_access == TRANSPORT_LUNFLAGS_READ_WRITE) ?
165 "READ-WRITE" : "READ-ONLY");
167 core_enable_device_list_for_node(lun, NULL, lun->unpacked_lun,
168 lun_access, acl, tpg);
170 * Check to see if there are any existing persistent reservation
171 * APTPL pre-registrations that need to be enabled for this dynamic
174 core_scsi3_check_aptpl_registration(dev, tpg, lun, acl,
176 spin_lock(&tpg->tpg_lun_lock);
178 spin_unlock(&tpg->tpg_lun_lock);
181 /* core_set_queue_depth_for_node():
185 static int core_set_queue_depth_for_node(
186 struct se_portal_group *tpg,
187 struct se_node_acl *acl)
189 if (!acl->queue_depth) {
190 pr_err("Queue depth for %s Initiator Node: %s is 0,"
191 "defaulting to 1.\n", tpg->se_tpg_tfo->get_fabric_name(),
193 acl->queue_depth = 1;
199 void array_free(void *array, int n)
204 for (i = 0; i < n; i++)
209 static void *array_zalloc(int n, size_t size, gfp_t flags)
214 a = kzalloc(n * sizeof(void*), flags);
217 for (i = 0; i < n; i++) {
218 a[i] = kzalloc(size, flags);
227 /* core_create_device_list_for_node():
231 static int core_create_device_list_for_node(struct se_node_acl *nacl)
233 struct se_dev_entry *deve;
236 nacl->device_list = array_zalloc(TRANSPORT_MAX_LUNS_PER_TPG,
237 sizeof(struct se_dev_entry), GFP_KERNEL);
238 if (!nacl->device_list) {
239 pr_err("Unable to allocate memory for"
240 " struct se_node_acl->device_list\n");
243 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
244 deve = nacl->device_list[i];
246 atomic_set(&deve->ua_count, 0);
247 atomic_set(&deve->pr_ref_count, 0);
248 spin_lock_init(&deve->ua_lock);
249 INIT_LIST_HEAD(&deve->alua_port_list);
250 INIT_LIST_HEAD(&deve->ua_list);
256 /* core_tpg_check_initiator_node_acl()
260 struct se_node_acl *core_tpg_check_initiator_node_acl(
261 struct se_portal_group *tpg,
262 unsigned char *initiatorname)
264 struct se_node_acl *acl;
266 acl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
270 if (!tpg->se_tpg_tfo->tpg_check_demo_mode(tpg))
273 acl = tpg->se_tpg_tfo->tpg_alloc_fabric_acl(tpg);
277 INIT_LIST_HEAD(&acl->acl_list);
278 INIT_LIST_HEAD(&acl->acl_sess_list);
279 kref_init(&acl->acl_kref);
280 init_completion(&acl->acl_free_comp);
281 spin_lock_init(&acl->device_list_lock);
282 spin_lock_init(&acl->nacl_sess_lock);
283 atomic_set(&acl->acl_pr_ref_count, 0);
284 acl->queue_depth = tpg->se_tpg_tfo->tpg_get_default_depth(tpg);
285 snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
287 acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX);
288 acl->dynamic_node_acl = 1;
290 tpg->se_tpg_tfo->set_default_node_attributes(acl);
292 if (core_create_device_list_for_node(acl) < 0) {
293 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
297 if (core_set_queue_depth_for_node(tpg, acl) < 0) {
298 core_free_device_list_for_node(acl, tpg);
299 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
303 * Here we only create demo-mode MappedLUNs from the active
304 * TPG LUNs if the fabric is not explicitly asking for
305 * tpg_check_demo_mode_login_only() == 1.
307 if ((tpg->se_tpg_tfo->tpg_check_demo_mode_login_only == NULL) ||
308 (tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg) != 1))
309 core_tpg_add_node_to_devs(acl, tpg);
311 spin_lock_irq(&tpg->acl_node_lock);
312 list_add_tail(&acl->acl_list, &tpg->acl_node_list);
313 tpg->num_node_acls++;
314 spin_unlock_irq(&tpg->acl_node_lock);
316 pr_debug("%s_TPG[%u] - Added DYNAMIC ACL with TCQ Depth: %d for %s"
317 " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
318 tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth,
319 tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
323 EXPORT_SYMBOL(core_tpg_check_initiator_node_acl);
325 void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl)
327 while (atomic_read(&nacl->acl_pr_ref_count) != 0)
331 void core_tpg_clear_object_luns(struct se_portal_group *tpg)
336 spin_lock(&tpg->tpg_lun_lock);
337 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
338 lun = tpg->tpg_lun_list[i];
340 if ((lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) ||
341 (lun->lun_se_dev == NULL))
344 spin_unlock(&tpg->tpg_lun_lock);
345 core_dev_del_lun(tpg, lun);
346 spin_lock(&tpg->tpg_lun_lock);
348 spin_unlock(&tpg->tpg_lun_lock);
350 EXPORT_SYMBOL(core_tpg_clear_object_luns);
352 /* core_tpg_add_initiator_node_acl():
356 struct se_node_acl *core_tpg_add_initiator_node_acl(
357 struct se_portal_group *tpg,
358 struct se_node_acl *se_nacl,
359 const char *initiatorname,
362 struct se_node_acl *acl = NULL;
364 spin_lock_irq(&tpg->acl_node_lock);
365 acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
367 if (acl->dynamic_node_acl) {
368 acl->dynamic_node_acl = 0;
369 pr_debug("%s_TPG[%u] - Replacing dynamic ACL"
370 " for %s\n", tpg->se_tpg_tfo->get_fabric_name(),
371 tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname);
372 spin_unlock_irq(&tpg->acl_node_lock);
374 * Release the locally allocated struct se_node_acl
375 * because * core_tpg_add_initiator_node_acl() returned
376 * a pointer to an existing demo mode node ACL.
379 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg,
384 pr_err("ACL entry for %s Initiator"
385 " Node %s already exists for TPG %u, ignoring"
386 " request.\n", tpg->se_tpg_tfo->get_fabric_name(),
387 initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg));
388 spin_unlock_irq(&tpg->acl_node_lock);
389 return ERR_PTR(-EEXIST);
391 spin_unlock_irq(&tpg->acl_node_lock);
394 pr_err("struct se_node_acl pointer is NULL\n");
395 return ERR_PTR(-EINVAL);
398 * For v4.x logic the se_node_acl_s is hanging off a fabric
399 * dependent structure allocated via
400 * struct target_core_fabric_ops->fabric_make_nodeacl()
404 INIT_LIST_HEAD(&acl->acl_list);
405 INIT_LIST_HEAD(&acl->acl_sess_list);
406 kref_init(&acl->acl_kref);
407 init_completion(&acl->acl_free_comp);
408 spin_lock_init(&acl->device_list_lock);
409 spin_lock_init(&acl->nacl_sess_lock);
410 atomic_set(&acl->acl_pr_ref_count, 0);
411 acl->queue_depth = queue_depth;
412 snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
414 acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX);
416 tpg->se_tpg_tfo->set_default_node_attributes(acl);
418 if (core_create_device_list_for_node(acl) < 0) {
419 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
420 return ERR_PTR(-ENOMEM);
423 if (core_set_queue_depth_for_node(tpg, acl) < 0) {
424 core_free_device_list_for_node(acl, tpg);
425 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
426 return ERR_PTR(-EINVAL);
429 spin_lock_irq(&tpg->acl_node_lock);
430 list_add_tail(&acl->acl_list, &tpg->acl_node_list);
431 tpg->num_node_acls++;
432 spin_unlock_irq(&tpg->acl_node_lock);
435 pr_debug("%s_TPG[%hu] - Added ACL with TCQ Depth: %d for %s"
436 " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
437 tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth,
438 tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
442 EXPORT_SYMBOL(core_tpg_add_initiator_node_acl);
444 /* core_tpg_del_initiator_node_acl():
448 int core_tpg_del_initiator_node_acl(
449 struct se_portal_group *tpg,
450 struct se_node_acl *acl,
453 LIST_HEAD(sess_list);
454 struct se_session *sess, *sess_tmp;
458 spin_lock_irq(&tpg->acl_node_lock);
459 if (acl->dynamic_node_acl) {
460 acl->dynamic_node_acl = 0;
462 list_del(&acl->acl_list);
463 tpg->num_node_acls--;
464 spin_unlock_irq(&tpg->acl_node_lock);
466 spin_lock_irqsave(&acl->nacl_sess_lock, flags);
469 list_for_each_entry_safe(sess, sess_tmp, &acl->acl_sess_list,
471 if (sess->sess_tearing_down != 0)
474 target_get_session(sess);
475 list_move(&sess->sess_acl_list, &sess_list);
477 spin_unlock_irqrestore(&acl->nacl_sess_lock, flags);
479 list_for_each_entry_safe(sess, sess_tmp, &sess_list, sess_acl_list) {
480 list_del(&sess->sess_acl_list);
482 rc = tpg->se_tpg_tfo->shutdown_session(sess);
483 target_put_session(sess);
486 target_put_session(sess);
488 target_put_nacl(acl);
490 * Wait for last target_put_nacl() to complete in target_complete_nacl()
491 * for active fabric session transport_deregister_session() callbacks.
493 wait_for_completion(&acl->acl_free_comp);
495 core_tpg_wait_for_nacl_pr_ref(acl);
496 core_clear_initiator_node_from_tpg(acl, tpg);
497 core_free_device_list_for_node(acl, tpg);
499 pr_debug("%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s"
500 " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
501 tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth,
502 tpg->se_tpg_tfo->get_fabric_name(), acl->initiatorname);
506 EXPORT_SYMBOL(core_tpg_del_initiator_node_acl);
508 /* core_tpg_set_initiator_node_queue_depth():
512 int core_tpg_set_initiator_node_queue_depth(
513 struct se_portal_group *tpg,
514 unsigned char *initiatorname,
518 struct se_session *sess, *init_sess = NULL;
519 struct se_node_acl *acl;
523 spin_lock_irq(&tpg->acl_node_lock);
524 acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
526 pr_err("Access Control List entry for %s Initiator"
527 " Node %s does not exists for TPG %hu, ignoring"
528 " request.\n", tpg->se_tpg_tfo->get_fabric_name(),
529 initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg));
530 spin_unlock_irq(&tpg->acl_node_lock);
533 if (acl->dynamic_node_acl) {
534 acl->dynamic_node_acl = 0;
537 spin_unlock_irq(&tpg->acl_node_lock);
539 spin_lock_irqsave(&tpg->session_lock, flags);
540 list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) {
541 if (sess->se_node_acl != acl)
545 pr_err("Unable to change queue depth for %s"
546 " Initiator Node: %s while session is"
547 " operational. To forcefully change the queue"
548 " depth and force session reinstatement"
549 " use the \"force=1\" parameter.\n",
550 tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
551 spin_unlock_irqrestore(&tpg->session_lock, flags);
553 spin_lock_irq(&tpg->acl_node_lock);
555 acl->dynamic_node_acl = 1;
556 spin_unlock_irq(&tpg->acl_node_lock);
560 * Determine if the session needs to be closed by our context.
562 if (!tpg->se_tpg_tfo->shutdown_session(sess))
570 * User has requested to change the queue depth for a Initiator Node.
571 * Change the value in the Node's struct se_node_acl, and call
572 * core_set_queue_depth_for_node() to add the requested queue depth.
574 * Finally call tpg->se_tpg_tfo->close_session() to force session
575 * reinstatement to occur if there is an active session for the
576 * $FABRIC_MOD Initiator Node in question.
578 acl->queue_depth = queue_depth;
580 if (core_set_queue_depth_for_node(tpg, acl) < 0) {
581 spin_unlock_irqrestore(&tpg->session_lock, flags);
583 * Force session reinstatement if
584 * core_set_queue_depth_for_node() failed, because we assume
585 * the $FABRIC_MOD has already the set session reinstatement
586 * bit from tpg->se_tpg_tfo->shutdown_session() called above.
589 tpg->se_tpg_tfo->close_session(init_sess);
591 spin_lock_irq(&tpg->acl_node_lock);
593 acl->dynamic_node_acl = 1;
594 spin_unlock_irq(&tpg->acl_node_lock);
597 spin_unlock_irqrestore(&tpg->session_lock, flags);
599 * If the $FABRIC_MOD session for the Initiator Node ACL exists,
600 * forcefully shutdown the $FABRIC_MOD session/nexus.
603 tpg->se_tpg_tfo->close_session(init_sess);
605 pr_debug("Successfully changed queue depth to: %d for Initiator"
606 " Node: %s on %s Target Portal Group: %u\n", queue_depth,
607 initiatorname, tpg->se_tpg_tfo->get_fabric_name(),
608 tpg->se_tpg_tfo->tpg_get_tag(tpg));
610 spin_lock_irq(&tpg->acl_node_lock);
612 acl->dynamic_node_acl = 1;
613 spin_unlock_irq(&tpg->acl_node_lock);
617 EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth);
619 /* core_tpg_set_initiator_node_tag():
621 * Initiator nodeacl tags are not used internally, but may be used by
622 * userspace to emulate aliases or groups.
623 * Returns length of newly-set tag or -EINVAL.
625 int core_tpg_set_initiator_node_tag(
626 struct se_portal_group *tpg,
627 struct se_node_acl *acl,
630 if (strlen(new_tag) >= MAX_ACL_TAG_SIZE)
633 if (!strncmp("NULL", new_tag, 4)) {
634 acl->acl_tag[0] = '\0';
638 return snprintf(acl->acl_tag, MAX_ACL_TAG_SIZE, "%s", new_tag);
640 EXPORT_SYMBOL(core_tpg_set_initiator_node_tag);
642 static void core_tpg_lun_ref_release(struct percpu_ref *ref)
644 struct se_lun *lun = container_of(ref, struct se_lun, lun_ref);
646 complete(&lun->lun_ref_comp);
649 static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg)
651 /* Set in core_dev_setup_virtual_lun0() */
652 struct se_device *dev = g_lun0_dev;
653 struct se_lun *lun = &se_tpg->tpg_virt_lun0;
654 u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
657 lun->unpacked_lun = 0;
658 lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
659 atomic_set(&lun->lun_acl_count, 0);
660 init_completion(&lun->lun_shutdown_comp);
661 INIT_LIST_HEAD(&lun->lun_acl_list);
662 spin_lock_init(&lun->lun_acl_lock);
663 spin_lock_init(&lun->lun_sep_lock);
664 init_completion(&lun->lun_ref_comp);
666 ret = core_tpg_add_lun(se_tpg, lun, lun_access, dev);
673 int core_tpg_register(
674 const struct target_core_fabric_ops *tfo,
675 struct se_wwn *se_wwn,
676 struct se_portal_group *se_tpg,
677 void *tpg_fabric_ptr,
683 se_tpg->tpg_lun_list = array_zalloc(TRANSPORT_MAX_LUNS_PER_TPG,
684 sizeof(struct se_lun), GFP_KERNEL);
685 if (!se_tpg->tpg_lun_list) {
686 pr_err("Unable to allocate struct se_portal_group->"
691 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
692 lun = se_tpg->tpg_lun_list[i];
693 lun->unpacked_lun = i;
694 lun->lun_link_magic = SE_LUN_LINK_MAGIC;
695 lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
696 atomic_set(&lun->lun_acl_count, 0);
697 init_completion(&lun->lun_shutdown_comp);
698 INIT_LIST_HEAD(&lun->lun_acl_list);
699 spin_lock_init(&lun->lun_acl_lock);
700 spin_lock_init(&lun->lun_sep_lock);
701 init_completion(&lun->lun_ref_comp);
704 se_tpg->se_tpg_type = se_tpg_type;
705 se_tpg->se_tpg_fabric_ptr = tpg_fabric_ptr;
706 se_tpg->se_tpg_tfo = tfo;
707 se_tpg->se_tpg_wwn = se_wwn;
708 atomic_set(&se_tpg->tpg_pr_ref_count, 0);
709 INIT_LIST_HEAD(&se_tpg->acl_node_list);
710 INIT_LIST_HEAD(&se_tpg->se_tpg_node);
711 INIT_LIST_HEAD(&se_tpg->tpg_sess_list);
712 spin_lock_init(&se_tpg->acl_node_lock);
713 spin_lock_init(&se_tpg->session_lock);
714 spin_lock_init(&se_tpg->tpg_lun_lock);
716 if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) {
717 if (core_tpg_setup_virtual_lun0(se_tpg) < 0) {
718 array_free(se_tpg->tpg_lun_list,
719 TRANSPORT_MAX_LUNS_PER_TPG);
724 spin_lock_bh(&tpg_lock);
725 list_add_tail(&se_tpg->se_tpg_node, &tpg_list);
726 spin_unlock_bh(&tpg_lock);
728 pr_debug("TARGET_CORE[%s]: Allocated %s struct se_portal_group for"
729 " endpoint: %s, Portal Tag: %u\n", tfo->get_fabric_name(),
730 (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ?
731 "Normal" : "Discovery", (tfo->tpg_get_wwn(se_tpg) == NULL) ?
732 "None" : tfo->tpg_get_wwn(se_tpg), tfo->tpg_get_tag(se_tpg));
736 EXPORT_SYMBOL(core_tpg_register);
738 int core_tpg_deregister(struct se_portal_group *se_tpg)
740 struct se_node_acl *nacl, *nacl_tmp;
742 pr_debug("TARGET_CORE[%s]: Deallocating %s struct se_portal_group"
743 " for endpoint: %s Portal Tag %u\n",
744 (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ?
745 "Normal" : "Discovery", se_tpg->se_tpg_tfo->get_fabric_name(),
746 se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg),
747 se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg));
749 spin_lock_bh(&tpg_lock);
750 list_del(&se_tpg->se_tpg_node);
751 spin_unlock_bh(&tpg_lock);
753 while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0)
756 * Release any remaining demo-mode generated se_node_acl that have
757 * not been released because of TFO->tpg_check_demo_mode_cache() == 1
758 * in transport_deregister_session().
760 spin_lock_irq(&se_tpg->acl_node_lock);
761 list_for_each_entry_safe(nacl, nacl_tmp, &se_tpg->acl_node_list,
763 list_del(&nacl->acl_list);
764 se_tpg->num_node_acls--;
765 spin_unlock_irq(&se_tpg->acl_node_lock);
767 core_tpg_wait_for_nacl_pr_ref(nacl);
768 core_free_device_list_for_node(nacl, se_tpg);
769 se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, nacl);
771 spin_lock_irq(&se_tpg->acl_node_lock);
773 spin_unlock_irq(&se_tpg->acl_node_lock);
775 if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL)
776 core_tpg_remove_lun(se_tpg, &se_tpg->tpg_virt_lun0);
778 se_tpg->se_tpg_fabric_ptr = NULL;
779 array_free(se_tpg->tpg_lun_list, TRANSPORT_MAX_LUNS_PER_TPG);
782 EXPORT_SYMBOL(core_tpg_deregister);
784 struct se_lun *core_tpg_alloc_lun(
785 struct se_portal_group *tpg,
790 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
791 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG"
792 "-1: %u for Target Portal Group: %u\n",
793 tpg->se_tpg_tfo->get_fabric_name(),
794 unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1,
795 tpg->se_tpg_tfo->tpg_get_tag(tpg));
796 return ERR_PTR(-EOVERFLOW);
799 spin_lock(&tpg->tpg_lun_lock);
800 lun = tpg->tpg_lun_list[unpacked_lun];
801 if (lun->lun_status == TRANSPORT_LUN_STATUS_ACTIVE) {
802 pr_err("TPG Logical Unit Number: %u is already active"
803 " on %s Target Portal Group: %u, ignoring request.\n",
804 unpacked_lun, tpg->se_tpg_tfo->get_fabric_name(),
805 tpg->se_tpg_tfo->tpg_get_tag(tpg));
806 spin_unlock(&tpg->tpg_lun_lock);
807 return ERR_PTR(-EINVAL);
809 spin_unlock(&tpg->tpg_lun_lock);
814 int core_tpg_add_lun(
815 struct se_portal_group *tpg,
818 struct se_device *dev)
822 ret = percpu_ref_init(&lun->lun_ref, core_tpg_lun_ref_release, 0,
827 ret = core_dev_export(dev, tpg, lun);
829 percpu_ref_exit(&lun->lun_ref);
833 spin_lock(&tpg->tpg_lun_lock);
834 lun->lun_access = lun_access;
835 lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE;
836 spin_unlock(&tpg->tpg_lun_lock);
841 void core_tpg_remove_lun(
842 struct se_portal_group *tpg,
845 core_clear_lun_from_tpg(lun, tpg);
846 transport_clear_lun_ref(lun);
848 core_dev_unexport(lun->lun_se_dev, tpg, lun);
850 spin_lock(&tpg->tpg_lun_lock);
851 lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
852 spin_unlock(&tpg->tpg_lun_lock);
854 percpu_ref_exit(&lun->lun_ref);