1 /*******************************************************************************
2 * Filename: target_core_tpg.c
4 * This file contains generic Target Portal Group related functions.
6 * (c) Copyright 2002-2012 RisingTide Systems LLC.
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"
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 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
115 if (!strcmp(acl->initiatorname, initiatorname) &&
116 !acl->dynamic_node_acl) {
117 spin_unlock_irq(&tpg->acl_node_lock);
121 spin_unlock_irq(&tpg->acl_node_lock);
126 /* core_tpg_add_node_to_devs():
130 void core_tpg_add_node_to_devs(
131 struct se_node_acl *acl,
132 struct se_portal_group *tpg)
137 struct se_device *dev;
139 spin_lock(&tpg->tpg_lun_lock);
140 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
141 lun = tpg->tpg_lun_list[i];
142 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE)
145 spin_unlock(&tpg->tpg_lun_lock);
147 dev = lun->lun_se_dev;
149 * By default in LIO-Target $FABRIC_MOD,
150 * demo_mode_write_protect is ON, or READ_ONLY;
152 if (!tpg->se_tpg_tfo->tpg_check_demo_mode_write_protect(tpg)) {
153 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
156 * Allow only optical drives to issue R/W in default RO
159 if (dev->transport->get_device_type(dev) == TYPE_DISK)
160 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
162 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
165 pr_debug("TARGET_CORE[%s]->TPG[%u]_LUN[%u] - Adding %s"
166 " access for LUN in Demo Mode\n",
167 tpg->se_tpg_tfo->get_fabric_name(),
168 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
169 (lun_access == TRANSPORT_LUNFLAGS_READ_WRITE) ?
170 "READ-WRITE" : "READ-ONLY");
172 core_enable_device_list_for_node(lun, NULL, lun->unpacked_lun,
173 lun_access, acl, tpg);
174 spin_lock(&tpg->tpg_lun_lock);
176 spin_unlock(&tpg->tpg_lun_lock);
179 /* core_set_queue_depth_for_node():
183 static int core_set_queue_depth_for_node(
184 struct se_portal_group *tpg,
185 struct se_node_acl *acl)
187 if (!acl->queue_depth) {
188 pr_err("Queue depth for %s Initiator Node: %s is 0,"
189 "defaulting to 1.\n", tpg->se_tpg_tfo->get_fabric_name(),
191 acl->queue_depth = 1;
197 void array_free(void *array, int n)
202 for (i = 0; i < n; i++)
207 static void *array_zalloc(int n, size_t size, gfp_t flags)
212 a = kzalloc(n * sizeof(void*), flags);
215 for (i = 0; i < n; i++) {
216 a[i] = kzalloc(size, flags);
225 /* core_create_device_list_for_node():
229 static int core_create_device_list_for_node(struct se_node_acl *nacl)
231 struct se_dev_entry *deve;
234 nacl->device_list = array_zalloc(TRANSPORT_MAX_LUNS_PER_TPG,
235 sizeof(struct se_dev_entry), GFP_KERNEL);
236 if (!nacl->device_list) {
237 pr_err("Unable to allocate memory for"
238 " struct se_node_acl->device_list\n");
241 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
242 deve = nacl->device_list[i];
244 atomic_set(&deve->ua_count, 0);
245 atomic_set(&deve->pr_ref_count, 0);
246 spin_lock_init(&deve->ua_lock);
247 INIT_LIST_HEAD(&deve->alua_port_list);
248 INIT_LIST_HEAD(&deve->ua_list);
254 /* core_tpg_check_initiator_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 = tpg->se_tpg_tfo->tpg_alloc_fabric_acl(tpg);
275 INIT_LIST_HEAD(&acl->acl_list);
276 INIT_LIST_HEAD(&acl->acl_sess_list);
277 kref_init(&acl->acl_kref);
278 init_completion(&acl->acl_free_comp);
279 spin_lock_init(&acl->device_list_lock);
280 spin_lock_init(&acl->nacl_sess_lock);
281 atomic_set(&acl->acl_pr_ref_count, 0);
282 acl->queue_depth = tpg->se_tpg_tfo->tpg_get_default_depth(tpg);
283 snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
285 acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX);
286 spin_lock_init(&acl->stats_lock);
287 acl->dynamic_node_acl = 1;
289 tpg->se_tpg_tfo->set_default_node_attributes(acl);
291 if (core_create_device_list_for_node(acl) < 0) {
292 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
296 if (core_set_queue_depth_for_node(tpg, acl) < 0) {
297 core_free_device_list_for_node(acl, tpg);
298 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
302 * Here we only create demo-mode MappedLUNs from the active
303 * TPG LUNs if the fabric is not explicitly asking for
304 * tpg_check_demo_mode_login_only() == 1.
306 if ((tpg->se_tpg_tfo->tpg_check_demo_mode_login_only == NULL) ||
307 (tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg) != 1))
308 core_tpg_add_node_to_devs(acl, tpg);
310 spin_lock_irq(&tpg->acl_node_lock);
311 list_add_tail(&acl->acl_list, &tpg->acl_node_list);
312 tpg->num_node_acls++;
313 spin_unlock_irq(&tpg->acl_node_lock);
315 pr_debug("%s_TPG[%u] - Added DYNAMIC ACL with TCQ Depth: %d for %s"
316 " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
317 tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth,
318 tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
322 EXPORT_SYMBOL(core_tpg_check_initiator_node_acl);
324 void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl)
326 while (atomic_read(&nacl->acl_pr_ref_count) != 0)
330 void core_tpg_clear_object_luns(struct se_portal_group *tpg)
335 spin_lock(&tpg->tpg_lun_lock);
336 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
337 lun = tpg->tpg_lun_list[i];
339 if ((lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) ||
340 (lun->lun_se_dev == NULL))
343 spin_unlock(&tpg->tpg_lun_lock);
344 core_dev_del_lun(tpg, lun->unpacked_lun);
345 spin_lock(&tpg->tpg_lun_lock);
347 spin_unlock(&tpg->tpg_lun_lock);
349 EXPORT_SYMBOL(core_tpg_clear_object_luns);
351 /* core_tpg_add_initiator_node_acl():
355 struct se_node_acl *core_tpg_add_initiator_node_acl(
356 struct se_portal_group *tpg,
357 struct se_node_acl *se_nacl,
358 const char *initiatorname,
361 struct se_node_acl *acl = NULL;
363 spin_lock_irq(&tpg->acl_node_lock);
364 acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
366 if (acl->dynamic_node_acl) {
367 acl->dynamic_node_acl = 0;
368 pr_debug("%s_TPG[%u] - Replacing dynamic ACL"
369 " for %s\n", tpg->se_tpg_tfo->get_fabric_name(),
370 tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname);
371 spin_unlock_irq(&tpg->acl_node_lock);
373 * Release the locally allocated struct se_node_acl
374 * because * core_tpg_add_initiator_node_acl() returned
375 * a pointer to an existing demo mode node ACL.
378 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg,
383 pr_err("ACL entry for %s Initiator"
384 " Node %s already exists for TPG %u, ignoring"
385 " request.\n", tpg->se_tpg_tfo->get_fabric_name(),
386 initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg));
387 spin_unlock_irq(&tpg->acl_node_lock);
388 return ERR_PTR(-EEXIST);
390 spin_unlock_irq(&tpg->acl_node_lock);
393 pr_err("struct se_node_acl pointer is NULL\n");
394 return ERR_PTR(-EINVAL);
397 * For v4.x logic the se_node_acl_s is hanging off a fabric
398 * dependent structure allocated via
399 * struct target_core_fabric_ops->fabric_make_nodeacl()
403 INIT_LIST_HEAD(&acl->acl_list);
404 INIT_LIST_HEAD(&acl->acl_sess_list);
405 kref_init(&acl->acl_kref);
406 init_completion(&acl->acl_free_comp);
407 spin_lock_init(&acl->device_list_lock);
408 spin_lock_init(&acl->nacl_sess_lock);
409 atomic_set(&acl->acl_pr_ref_count, 0);
410 acl->queue_depth = queue_depth;
411 snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
413 acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX);
414 spin_lock_init(&acl->stats_lock);
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 int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg)
644 /* Set in core_dev_setup_virtual_lun0() */
645 struct se_device *dev = g_lun0_dev;
646 struct se_lun *lun = &se_tpg->tpg_virt_lun0;
647 u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
650 lun->unpacked_lun = 0;
651 lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
652 atomic_set(&lun->lun_acl_count, 0);
653 init_completion(&lun->lun_shutdown_comp);
654 INIT_LIST_HEAD(&lun->lun_acl_list);
655 INIT_LIST_HEAD(&lun->lun_cmd_list);
656 spin_lock_init(&lun->lun_acl_lock);
657 spin_lock_init(&lun->lun_cmd_lock);
658 spin_lock_init(&lun->lun_sep_lock);
660 ret = core_tpg_post_addlun(se_tpg, lun, lun_access, dev);
667 static void core_tpg_release_virtual_lun0(struct se_portal_group *se_tpg)
669 struct se_lun *lun = &se_tpg->tpg_virt_lun0;
671 core_tpg_post_dellun(se_tpg, lun);
674 int core_tpg_register(
675 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 INIT_LIST_HEAD(&lun->lun_cmd_list);
701 spin_lock_init(&lun->lun_acl_lock);
702 spin_lock_init(&lun->lun_cmd_lock);
703 spin_lock_init(&lun->lun_sep_lock);
706 se_tpg->se_tpg_type = se_tpg_type;
707 se_tpg->se_tpg_fabric_ptr = tpg_fabric_ptr;
708 se_tpg->se_tpg_tfo = tfo;
709 se_tpg->se_tpg_wwn = se_wwn;
710 atomic_set(&se_tpg->tpg_pr_ref_count, 0);
711 INIT_LIST_HEAD(&se_tpg->acl_node_list);
712 INIT_LIST_HEAD(&se_tpg->se_tpg_node);
713 INIT_LIST_HEAD(&se_tpg->tpg_sess_list);
714 spin_lock_init(&se_tpg->acl_node_lock);
715 spin_lock_init(&se_tpg->session_lock);
716 spin_lock_init(&se_tpg->tpg_lun_lock);
718 if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) {
719 if (core_tpg_setup_virtual_lun0(se_tpg) < 0) {
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_release_virtual_lun0(se_tpg);
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_pre_addlun(
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_post_addlun(
816 struct se_portal_group *tpg,
823 ret = core_dev_export(lun_ptr, tpg, lun);
827 spin_lock(&tpg->tpg_lun_lock);
828 lun->lun_access = lun_access;
829 lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE;
830 spin_unlock(&tpg->tpg_lun_lock);
835 static void core_tpg_shutdown_lun(
836 struct se_portal_group *tpg,
839 core_clear_lun_from_tpg(lun, tpg);
840 transport_clear_lun_from_sessions(lun);
843 struct se_lun *core_tpg_pre_dellun(
844 struct se_portal_group *tpg,
849 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
850 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG"
851 "-1: %u for Target Portal Group: %u\n",
852 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
853 TRANSPORT_MAX_LUNS_PER_TPG-1,
854 tpg->se_tpg_tfo->tpg_get_tag(tpg));
855 return ERR_PTR(-EOVERFLOW);
858 spin_lock(&tpg->tpg_lun_lock);
859 lun = tpg->tpg_lun_list[unpacked_lun];
860 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
861 pr_err("%s Logical Unit Number: %u is not active on"
862 " Target Portal Group: %u, ignoring request.\n",
863 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
864 tpg->se_tpg_tfo->tpg_get_tag(tpg));
865 spin_unlock(&tpg->tpg_lun_lock);
866 return ERR_PTR(-ENODEV);
868 spin_unlock(&tpg->tpg_lun_lock);
873 int core_tpg_post_dellun(
874 struct se_portal_group *tpg,
877 core_tpg_shutdown_lun(tpg, lun);
879 core_dev_unexport(lun->lun_se_dev, tpg, lun);
881 spin_lock(&tpg->tpg_lun_lock);
882 lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
883 spin_unlock(&tpg->tpg_lun_lock);