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.h>
36 #include <scsi/scsi_cmnd.h>
38 #include <target/target_core_base.h>
39 #include <target/target_core_backend.h>
40 #include <target/target_core_fabric.h>
42 #include "target_core_internal.h"
43 #include "target_core_pr.h"
45 extern struct se_device *g_lun0_dev;
47 static DEFINE_SPINLOCK(tpg_lock);
48 static LIST_HEAD(tpg_list);
50 /* core_clear_initiator_node_from_tpg():
54 static void core_clear_initiator_node_from_tpg(
55 struct se_node_acl *nacl,
56 struct se_portal_group *tpg)
59 struct se_dev_entry *deve;
62 spin_lock_irq(&nacl->device_list_lock);
63 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
64 deve = nacl->device_list[i];
66 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
70 pr_err("%s device entries device pointer is"
71 " NULL, but Initiator has access.\n",
72 tpg->se_tpg_tfo->get_fabric_name());
77 spin_unlock_irq(&nacl->device_list_lock);
78 core_disable_device_list_for_node(lun, NULL, deve->mapped_lun,
79 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
81 spin_lock_irq(&nacl->device_list_lock);
83 spin_unlock_irq(&nacl->device_list_lock);
86 /* __core_tpg_get_initiator_node_acl():
88 * spin_lock_bh(&tpg->acl_node_lock); must be held when calling
90 struct se_node_acl *__core_tpg_get_initiator_node_acl(
91 struct se_portal_group *tpg,
92 const char *initiatorname)
94 struct se_node_acl *acl;
96 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
97 if (!strcmp(acl->initiatorname, initiatorname))
104 /* core_tpg_get_initiator_node_acl():
108 struct se_node_acl *core_tpg_get_initiator_node_acl(
109 struct se_portal_group *tpg,
110 unsigned char *initiatorname)
112 struct se_node_acl *acl;
114 spin_lock_irq(&tpg->acl_node_lock);
115 acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
116 spin_unlock_irq(&tpg->acl_node_lock);
120 EXPORT_SYMBOL(core_tpg_get_initiator_node_acl);
122 /* core_tpg_add_node_to_devs():
126 void core_tpg_add_node_to_devs(
127 struct se_node_acl *acl,
128 struct se_portal_group *tpg)
133 struct se_device *dev;
135 spin_lock(&tpg->tpg_lun_lock);
136 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
137 lun = tpg->tpg_lun_list[i];
138 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE)
141 spin_unlock(&tpg->tpg_lun_lock);
143 dev = lun->lun_se_dev;
145 * By default in LIO-Target $FABRIC_MOD,
146 * demo_mode_write_protect is ON, or READ_ONLY;
148 if (!tpg->se_tpg_tfo->tpg_check_demo_mode_write_protect(tpg)) {
149 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
152 * Allow only optical drives to issue R/W in default RO
155 if (dev->transport->get_device_type(dev) == TYPE_DISK)
156 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
158 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
161 pr_debug("TARGET_CORE[%s]->TPG[%u]_LUN[%u] - Adding %s"
162 " access for LUN in Demo Mode\n",
163 tpg->se_tpg_tfo->get_fabric_name(),
164 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
165 (lun_access == TRANSPORT_LUNFLAGS_READ_WRITE) ?
166 "READ-WRITE" : "READ-ONLY");
168 core_enable_device_list_for_node(lun, NULL, lun->unpacked_lun,
169 lun_access, acl, tpg);
171 * Check to see if there are any existing persistent reservation
172 * APTPL pre-registrations that need to be enabled for this dynamic
175 core_scsi3_check_aptpl_registration(dev, tpg, lun, acl,
177 spin_lock(&tpg->tpg_lun_lock);
179 spin_unlock(&tpg->tpg_lun_lock);
182 /* core_set_queue_depth_for_node():
186 static int core_set_queue_depth_for_node(
187 struct se_portal_group *tpg,
188 struct se_node_acl *acl)
190 if (!acl->queue_depth) {
191 pr_err("Queue depth for %s Initiator Node: %s is 0,"
192 "defaulting to 1.\n", tpg->se_tpg_tfo->get_fabric_name(),
194 acl->queue_depth = 1;
200 void array_free(void *array, int n)
205 for (i = 0; i < n; i++)
210 static void *array_zalloc(int n, size_t size, gfp_t flags)
215 a = kzalloc(n * sizeof(void*), flags);
218 for (i = 0; i < n; i++) {
219 a[i] = kzalloc(size, flags);
228 /* core_create_device_list_for_node():
232 static int core_create_device_list_for_node(struct se_node_acl *nacl)
234 struct se_dev_entry *deve;
237 nacl->device_list = array_zalloc(TRANSPORT_MAX_LUNS_PER_TPG,
238 sizeof(struct se_dev_entry), GFP_KERNEL);
239 if (!nacl->device_list) {
240 pr_err("Unable to allocate memory for"
241 " struct se_node_acl->device_list\n");
244 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
245 deve = nacl->device_list[i];
247 atomic_set(&deve->ua_count, 0);
248 atomic_set(&deve->pr_ref_count, 0);
249 spin_lock_init(&deve->ua_lock);
250 INIT_LIST_HEAD(&deve->alua_port_list);
251 INIT_LIST_HEAD(&deve->ua_list);
257 /* core_tpg_check_initiator_node_acl()
261 struct se_node_acl *core_tpg_check_initiator_node_acl(
262 struct se_portal_group *tpg,
263 unsigned char *initiatorname)
265 struct se_node_acl *acl;
267 acl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
271 if (!tpg->se_tpg_tfo->tpg_check_demo_mode(tpg))
274 acl = tpg->se_tpg_tfo->tpg_alloc_fabric_acl(tpg);
278 INIT_LIST_HEAD(&acl->acl_list);
279 INIT_LIST_HEAD(&acl->acl_sess_list);
280 kref_init(&acl->acl_kref);
281 init_completion(&acl->acl_free_comp);
282 spin_lock_init(&acl->device_list_lock);
283 spin_lock_init(&acl->nacl_sess_lock);
284 atomic_set(&acl->acl_pr_ref_count, 0);
285 acl->queue_depth = tpg->se_tpg_tfo->tpg_get_default_depth(tpg);
286 snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
288 acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX);
289 acl->dynamic_node_acl = 1;
291 tpg->se_tpg_tfo->set_default_node_attributes(acl);
293 if (core_create_device_list_for_node(acl) < 0) {
294 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
298 if (core_set_queue_depth_for_node(tpg, acl) < 0) {
299 core_free_device_list_for_node(acl, tpg);
300 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
304 * Here we only create demo-mode MappedLUNs from the active
305 * TPG LUNs if the fabric is not explicitly asking for
306 * tpg_check_demo_mode_login_only() == 1.
308 if ((tpg->se_tpg_tfo->tpg_check_demo_mode_login_only == NULL) ||
309 (tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg) != 1))
310 core_tpg_add_node_to_devs(acl, tpg);
312 spin_lock_irq(&tpg->acl_node_lock);
313 list_add_tail(&acl->acl_list, &tpg->acl_node_list);
314 tpg->num_node_acls++;
315 spin_unlock_irq(&tpg->acl_node_lock);
317 pr_debug("%s_TPG[%u] - Added DYNAMIC ACL with TCQ Depth: %d for %s"
318 " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
319 tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth,
320 tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
324 EXPORT_SYMBOL(core_tpg_check_initiator_node_acl);
326 void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl)
328 while (atomic_read(&nacl->acl_pr_ref_count) != 0)
332 void core_tpg_clear_object_luns(struct se_portal_group *tpg)
337 spin_lock(&tpg->tpg_lun_lock);
338 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
339 lun = tpg->tpg_lun_list[i];
341 if ((lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) ||
342 (lun->lun_se_dev == NULL))
345 spin_unlock(&tpg->tpg_lun_lock);
346 core_dev_del_lun(tpg, lun);
347 spin_lock(&tpg->tpg_lun_lock);
349 spin_unlock(&tpg->tpg_lun_lock);
351 EXPORT_SYMBOL(core_tpg_clear_object_luns);
353 /* core_tpg_add_initiator_node_acl():
357 struct se_node_acl *core_tpg_add_initiator_node_acl(
358 struct se_portal_group *tpg,
359 struct se_node_acl *se_nacl,
360 const char *initiatorname,
363 struct se_node_acl *acl = NULL;
365 spin_lock_irq(&tpg->acl_node_lock);
366 acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
368 if (acl->dynamic_node_acl) {
369 acl->dynamic_node_acl = 0;
370 pr_debug("%s_TPG[%u] - Replacing dynamic ACL"
371 " for %s\n", tpg->se_tpg_tfo->get_fabric_name(),
372 tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname);
373 spin_unlock_irq(&tpg->acl_node_lock);
375 * Release the locally allocated struct se_node_acl
376 * because * core_tpg_add_initiator_node_acl() returned
377 * a pointer to an existing demo mode node ACL.
380 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg,
385 pr_err("ACL entry for %s Initiator"
386 " Node %s already exists for TPG %u, ignoring"
387 " request.\n", tpg->se_tpg_tfo->get_fabric_name(),
388 initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg));
389 spin_unlock_irq(&tpg->acl_node_lock);
390 return ERR_PTR(-EEXIST);
392 spin_unlock_irq(&tpg->acl_node_lock);
395 pr_err("struct se_node_acl pointer is NULL\n");
396 return ERR_PTR(-EINVAL);
399 * For v4.x logic the se_node_acl_s is hanging off a fabric
400 * dependent structure allocated via
401 * struct target_core_fabric_ops->fabric_make_nodeacl()
405 INIT_LIST_HEAD(&acl->acl_list);
406 INIT_LIST_HEAD(&acl->acl_sess_list);
407 kref_init(&acl->acl_kref);
408 init_completion(&acl->acl_free_comp);
409 spin_lock_init(&acl->device_list_lock);
410 spin_lock_init(&acl->nacl_sess_lock);
411 atomic_set(&acl->acl_pr_ref_count, 0);
412 acl->queue_depth = queue_depth;
413 snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
415 acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX);
417 tpg->se_tpg_tfo->set_default_node_attributes(acl);
419 if (core_create_device_list_for_node(acl) < 0) {
420 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
421 return ERR_PTR(-ENOMEM);
424 if (core_set_queue_depth_for_node(tpg, acl) < 0) {
425 core_free_device_list_for_node(acl, tpg);
426 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
427 return ERR_PTR(-EINVAL);
430 spin_lock_irq(&tpg->acl_node_lock);
431 list_add_tail(&acl->acl_list, &tpg->acl_node_list);
432 tpg->num_node_acls++;
433 spin_unlock_irq(&tpg->acl_node_lock);
436 pr_debug("%s_TPG[%hu] - Added ACL with TCQ Depth: %d for %s"
437 " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
438 tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth,
439 tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
443 EXPORT_SYMBOL(core_tpg_add_initiator_node_acl);
445 /* core_tpg_del_initiator_node_acl():
449 int core_tpg_del_initiator_node_acl(
450 struct se_portal_group *tpg,
451 struct se_node_acl *acl,
454 LIST_HEAD(sess_list);
455 struct se_session *sess, *sess_tmp;
459 spin_lock_irq(&tpg->acl_node_lock);
460 if (acl->dynamic_node_acl) {
461 acl->dynamic_node_acl = 0;
463 list_del(&acl->acl_list);
464 tpg->num_node_acls--;
465 spin_unlock_irq(&tpg->acl_node_lock);
467 spin_lock_irqsave(&acl->nacl_sess_lock, flags);
470 list_for_each_entry_safe(sess, sess_tmp, &acl->acl_sess_list,
472 if (sess->sess_tearing_down != 0)
475 target_get_session(sess);
476 list_move(&sess->sess_acl_list, &sess_list);
478 spin_unlock_irqrestore(&acl->nacl_sess_lock, flags);
480 list_for_each_entry_safe(sess, sess_tmp, &sess_list, sess_acl_list) {
481 list_del(&sess->sess_acl_list);
483 rc = tpg->se_tpg_tfo->shutdown_session(sess);
484 target_put_session(sess);
487 target_put_session(sess);
489 target_put_nacl(acl);
491 * Wait for last target_put_nacl() to complete in target_complete_nacl()
492 * for active fabric session transport_deregister_session() callbacks.
494 wait_for_completion(&acl->acl_free_comp);
496 core_tpg_wait_for_nacl_pr_ref(acl);
497 core_clear_initiator_node_from_tpg(acl, tpg);
498 core_free_device_list_for_node(acl, tpg);
500 pr_debug("%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s"
501 " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
502 tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth,
503 tpg->se_tpg_tfo->get_fabric_name(), acl->initiatorname);
507 EXPORT_SYMBOL(core_tpg_del_initiator_node_acl);
509 /* core_tpg_set_initiator_node_queue_depth():
513 int core_tpg_set_initiator_node_queue_depth(
514 struct se_portal_group *tpg,
515 unsigned char *initiatorname,
519 struct se_session *sess, *init_sess = NULL;
520 struct se_node_acl *acl;
524 spin_lock_irq(&tpg->acl_node_lock);
525 acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
527 pr_err("Access Control List entry for %s Initiator"
528 " Node %s does not exists for TPG %hu, ignoring"
529 " request.\n", tpg->se_tpg_tfo->get_fabric_name(),
530 initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg));
531 spin_unlock_irq(&tpg->acl_node_lock);
534 if (acl->dynamic_node_acl) {
535 acl->dynamic_node_acl = 0;
538 spin_unlock_irq(&tpg->acl_node_lock);
540 spin_lock_irqsave(&tpg->session_lock, flags);
541 list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) {
542 if (sess->se_node_acl != acl)
546 pr_err("Unable to change queue depth for %s"
547 " Initiator Node: %s while session is"
548 " operational. To forcefully change the queue"
549 " depth and force session reinstatement"
550 " use the \"force=1\" parameter.\n",
551 tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
552 spin_unlock_irqrestore(&tpg->session_lock, flags);
554 spin_lock_irq(&tpg->acl_node_lock);
556 acl->dynamic_node_acl = 1;
557 spin_unlock_irq(&tpg->acl_node_lock);
561 * Determine if the session needs to be closed by our context.
563 if (!tpg->se_tpg_tfo->shutdown_session(sess))
571 * User has requested to change the queue depth for a Initiator Node.
572 * Change the value in the Node's struct se_node_acl, and call
573 * core_set_queue_depth_for_node() to add the requested queue depth.
575 * Finally call tpg->se_tpg_tfo->close_session() to force session
576 * reinstatement to occur if there is an active session for the
577 * $FABRIC_MOD Initiator Node in question.
579 acl->queue_depth = queue_depth;
581 if (core_set_queue_depth_for_node(tpg, acl) < 0) {
582 spin_unlock_irqrestore(&tpg->session_lock, flags);
584 * Force session reinstatement if
585 * core_set_queue_depth_for_node() failed, because we assume
586 * the $FABRIC_MOD has already the set session reinstatement
587 * bit from tpg->se_tpg_tfo->shutdown_session() called above.
590 tpg->se_tpg_tfo->close_session(init_sess);
592 spin_lock_irq(&tpg->acl_node_lock);
594 acl->dynamic_node_acl = 1;
595 spin_unlock_irq(&tpg->acl_node_lock);
598 spin_unlock_irqrestore(&tpg->session_lock, flags);
600 * If the $FABRIC_MOD session for the Initiator Node ACL exists,
601 * forcefully shutdown the $FABRIC_MOD session/nexus.
604 tpg->se_tpg_tfo->close_session(init_sess);
606 pr_debug("Successfully changed queue depth to: %d for Initiator"
607 " Node: %s on %s Target Portal Group: %u\n", queue_depth,
608 initiatorname, tpg->se_tpg_tfo->get_fabric_name(),
609 tpg->se_tpg_tfo->tpg_get_tag(tpg));
611 spin_lock_irq(&tpg->acl_node_lock);
613 acl->dynamic_node_acl = 1;
614 spin_unlock_irq(&tpg->acl_node_lock);
618 EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth);
620 /* core_tpg_set_initiator_node_tag():
622 * Initiator nodeacl tags are not used internally, but may be used by
623 * userspace to emulate aliases or groups.
624 * Returns length of newly-set tag or -EINVAL.
626 int core_tpg_set_initiator_node_tag(
627 struct se_portal_group *tpg,
628 struct se_node_acl *acl,
631 if (strlen(new_tag) >= MAX_ACL_TAG_SIZE)
634 if (!strncmp("NULL", new_tag, 4)) {
635 acl->acl_tag[0] = '\0';
639 return snprintf(acl->acl_tag, MAX_ACL_TAG_SIZE, "%s", new_tag);
641 EXPORT_SYMBOL(core_tpg_set_initiator_node_tag);
643 static void core_tpg_lun_ref_release(struct percpu_ref *ref)
645 struct se_lun *lun = container_of(ref, struct se_lun, lun_ref);
647 complete(&lun->lun_ref_comp);
650 static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg)
652 /* Set in core_dev_setup_virtual_lun0() */
653 struct se_device *dev = g_lun0_dev;
654 struct se_lun *lun = &se_tpg->tpg_virt_lun0;
655 u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
658 lun->unpacked_lun = 0;
659 lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
660 atomic_set(&lun->lun_acl_count, 0);
661 init_completion(&lun->lun_shutdown_comp);
662 INIT_LIST_HEAD(&lun->lun_acl_list);
663 spin_lock_init(&lun->lun_acl_lock);
664 spin_lock_init(&lun->lun_sep_lock);
665 init_completion(&lun->lun_ref_comp);
667 ret = core_tpg_add_lun(se_tpg, lun, lun_access, dev);
674 int core_tpg_register(
675 const struct target_core_fabric_ops *tfo,
676 struct se_wwn *se_wwn,
677 struct se_portal_group *se_tpg,
678 void *tpg_fabric_ptr,
684 se_tpg->tpg_lun_list = array_zalloc(TRANSPORT_MAX_LUNS_PER_TPG,
685 sizeof(struct se_lun), GFP_KERNEL);
686 if (!se_tpg->tpg_lun_list) {
687 pr_err("Unable to allocate struct se_portal_group->"
692 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
693 lun = se_tpg->tpg_lun_list[i];
694 lun->unpacked_lun = i;
695 lun->lun_link_magic = SE_LUN_LINK_MAGIC;
696 lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
697 atomic_set(&lun->lun_acl_count, 0);
698 init_completion(&lun->lun_shutdown_comp);
699 INIT_LIST_HEAD(&lun->lun_acl_list);
700 spin_lock_init(&lun->lun_acl_lock);
701 spin_lock_init(&lun->lun_sep_lock);
702 init_completion(&lun->lun_ref_comp);
705 se_tpg->se_tpg_type = se_tpg_type;
706 se_tpg->se_tpg_fabric_ptr = tpg_fabric_ptr;
707 se_tpg->se_tpg_tfo = tfo;
708 se_tpg->se_tpg_wwn = se_wwn;
709 atomic_set(&se_tpg->tpg_pr_ref_count, 0);
710 INIT_LIST_HEAD(&se_tpg->acl_node_list);
711 INIT_LIST_HEAD(&se_tpg->se_tpg_node);
712 INIT_LIST_HEAD(&se_tpg->tpg_sess_list);
713 spin_lock_init(&se_tpg->acl_node_lock);
714 spin_lock_init(&se_tpg->session_lock);
715 spin_lock_init(&se_tpg->tpg_lun_lock);
717 if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) {
718 if (core_tpg_setup_virtual_lun0(se_tpg) < 0) {
719 array_free(se_tpg->tpg_lun_list,
720 TRANSPORT_MAX_LUNS_PER_TPG);
725 spin_lock_bh(&tpg_lock);
726 list_add_tail(&se_tpg->se_tpg_node, &tpg_list);
727 spin_unlock_bh(&tpg_lock);
729 pr_debug("TARGET_CORE[%s]: Allocated %s struct se_portal_group for"
730 " endpoint: %s, Portal Tag: %u\n", tfo->get_fabric_name(),
731 (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ?
732 "Normal" : "Discovery", (tfo->tpg_get_wwn(se_tpg) == NULL) ?
733 "None" : tfo->tpg_get_wwn(se_tpg), tfo->tpg_get_tag(se_tpg));
737 EXPORT_SYMBOL(core_tpg_register);
739 int core_tpg_deregister(struct se_portal_group *se_tpg)
741 struct se_node_acl *nacl, *nacl_tmp;
743 pr_debug("TARGET_CORE[%s]: Deallocating %s struct se_portal_group"
744 " for endpoint: %s Portal Tag %u\n",
745 (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ?
746 "Normal" : "Discovery", se_tpg->se_tpg_tfo->get_fabric_name(),
747 se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg),
748 se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg));
750 spin_lock_bh(&tpg_lock);
751 list_del(&se_tpg->se_tpg_node);
752 spin_unlock_bh(&tpg_lock);
754 while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0)
757 * Release any remaining demo-mode generated se_node_acl that have
758 * not been released because of TFO->tpg_check_demo_mode_cache() == 1
759 * in transport_deregister_session().
761 spin_lock_irq(&se_tpg->acl_node_lock);
762 list_for_each_entry_safe(nacl, nacl_tmp, &se_tpg->acl_node_list,
764 list_del(&nacl->acl_list);
765 se_tpg->num_node_acls--;
766 spin_unlock_irq(&se_tpg->acl_node_lock);
768 core_tpg_wait_for_nacl_pr_ref(nacl);
769 core_free_device_list_for_node(nacl, se_tpg);
770 se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, nacl);
772 spin_lock_irq(&se_tpg->acl_node_lock);
774 spin_unlock_irq(&se_tpg->acl_node_lock);
776 if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL)
777 core_tpg_remove_lun(se_tpg, &se_tpg->tpg_virt_lun0);
779 se_tpg->se_tpg_fabric_ptr = NULL;
780 array_free(se_tpg->tpg_lun_list, TRANSPORT_MAX_LUNS_PER_TPG);
783 EXPORT_SYMBOL(core_tpg_deregister);
785 struct se_lun *core_tpg_alloc_lun(
786 struct se_portal_group *tpg,
791 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
792 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG"
793 "-1: %u for Target Portal Group: %u\n",
794 tpg->se_tpg_tfo->get_fabric_name(),
795 unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1,
796 tpg->se_tpg_tfo->tpg_get_tag(tpg));
797 return ERR_PTR(-EOVERFLOW);
800 spin_lock(&tpg->tpg_lun_lock);
801 lun = tpg->tpg_lun_list[unpacked_lun];
802 if (lun->lun_status == TRANSPORT_LUN_STATUS_ACTIVE) {
803 pr_err("TPG Logical Unit Number: %u is already active"
804 " on %s Target Portal Group: %u, ignoring request.\n",
805 unpacked_lun, tpg->se_tpg_tfo->get_fabric_name(),
806 tpg->se_tpg_tfo->tpg_get_tag(tpg));
807 spin_unlock(&tpg->tpg_lun_lock);
808 return ERR_PTR(-EINVAL);
810 spin_unlock(&tpg->tpg_lun_lock);
815 int core_tpg_add_lun(
816 struct se_portal_group *tpg,
819 struct se_device *dev)
823 ret = percpu_ref_init(&lun->lun_ref, core_tpg_lun_ref_release, 0,
828 ret = core_dev_export(dev, tpg, lun);
830 percpu_ref_exit(&lun->lun_ref);
834 spin_lock(&tpg->tpg_lun_lock);
835 lun->lun_access = lun_access;
836 lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE;
837 spin_unlock(&tpg->tpg_lun_lock);
842 void core_tpg_remove_lun(
843 struct se_portal_group *tpg,
846 core_clear_lun_from_tpg(lun, tpg);
847 transport_clear_lun_ref(lun);
849 core_dev_unexport(lun->lun_se_dev, tpg, lun);
851 spin_lock(&tpg->tpg_lun_lock);
852 lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
853 spin_unlock(&tpg->tpg_lun_lock);
855 percpu_ref_exit(&lun->lun_ref);