1 /*******************************************************************************
2 * Filename: target_core_tpg.c
4 * This file contains generic Target Portal Group related functions.
6 * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
7 * Copyright (c) 2005, 2006, 2007 SBE, Inc.
8 * Copyright (c) 2007-2010 Rising Tide Systems
9 * Copyright (c) 2008-2010 Linux-iSCSI.org
11 * Nicholas A. Bellinger <nab@kernel.org>
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 ******************************************************************************/
29 #include <linux/net.h>
30 #include <linux/string.h>
31 #include <linux/timer.h>
32 #include <linux/slab.h>
33 #include <linux/spinlock.h>
35 #include <linux/export.h>
38 #include <scsi/scsi.h>
39 #include <scsi/scsi_cmnd.h>
41 #include <target/target_core_base.h>
42 #include <target/target_core_device.h>
43 #include <target/target_core_tpg.h>
44 #include <target/target_core_transport.h>
45 #include <target/target_core_fabric_ops.h>
47 #include "target_core_hba.h"
48 #include "target_core_stat.h"
50 extern struct se_device *g_lun0_dev;
52 static DEFINE_SPINLOCK(tpg_lock);
53 static LIST_HEAD(tpg_list);
55 /* core_clear_initiator_node_from_tpg():
59 static void core_clear_initiator_node_from_tpg(
60 struct se_node_acl *nacl,
61 struct se_portal_group *tpg)
64 struct se_dev_entry *deve;
66 struct se_lun_acl *acl, *acl_tmp;
68 spin_lock_irq(&nacl->device_list_lock);
69 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
70 deve = &nacl->device_list[i];
72 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
76 pr_err("%s device entries device pointer is"
77 " NULL, but Initiator has access.\n",
78 tpg->se_tpg_tfo->get_fabric_name());
83 spin_unlock_irq(&nacl->device_list_lock);
84 core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
85 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
87 spin_lock(&lun->lun_acl_lock);
88 list_for_each_entry_safe(acl, acl_tmp,
89 &lun->lun_acl_list, lacl_list) {
90 if (!strcmp(acl->initiatorname, nacl->initiatorname) &&
91 (acl->mapped_lun == deve->mapped_lun))
96 pr_err("Unable to locate struct se_lun_acl for %s,"
97 " mapped_lun: %u\n", nacl->initiatorname,
99 spin_unlock(&lun->lun_acl_lock);
100 spin_lock_irq(&nacl->device_list_lock);
104 list_del(&acl->lacl_list);
105 spin_unlock(&lun->lun_acl_lock);
107 spin_lock_irq(&nacl->device_list_lock);
110 spin_unlock_irq(&nacl->device_list_lock);
113 /* __core_tpg_get_initiator_node_acl():
115 * spin_lock_bh(&tpg->acl_node_lock); must be held when calling
117 struct se_node_acl *__core_tpg_get_initiator_node_acl(
118 struct se_portal_group *tpg,
119 const char *initiatorname)
121 struct se_node_acl *acl;
123 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
124 if (!strcmp(acl->initiatorname, initiatorname))
131 /* core_tpg_get_initiator_node_acl():
135 struct se_node_acl *core_tpg_get_initiator_node_acl(
136 struct se_portal_group *tpg,
137 unsigned char *initiatorname)
139 struct se_node_acl *acl;
141 spin_lock_irq(&tpg->acl_node_lock);
142 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
143 if (!strcmp(acl->initiatorname, initiatorname) &&
144 !acl->dynamic_node_acl) {
145 spin_unlock_irq(&tpg->acl_node_lock);
149 spin_unlock_irq(&tpg->acl_node_lock);
154 /* core_tpg_add_node_to_devs():
158 void core_tpg_add_node_to_devs(
159 struct se_node_acl *acl,
160 struct se_portal_group *tpg)
165 struct se_device *dev;
167 spin_lock(&tpg->tpg_lun_lock);
168 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
169 lun = &tpg->tpg_lun_list[i];
170 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE)
173 spin_unlock(&tpg->tpg_lun_lock);
175 dev = lun->lun_se_dev;
177 * By default in LIO-Target $FABRIC_MOD,
178 * demo_mode_write_protect is ON, or READ_ONLY;
180 if (!tpg->se_tpg_tfo->tpg_check_demo_mode_write_protect(tpg)) {
181 if (dev->dev_flags & DF_READ_ONLY)
182 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
184 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
187 * Allow only optical drives to issue R/W in default RO
190 if (dev->transport->get_device_type(dev) == TYPE_DISK)
191 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
193 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
196 pr_debug("TARGET_CORE[%s]->TPG[%u]_LUN[%u] - Adding %s"
197 " access for LUN in Demo Mode\n",
198 tpg->se_tpg_tfo->get_fabric_name(),
199 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
200 (lun_access == TRANSPORT_LUNFLAGS_READ_WRITE) ?
201 "READ-WRITE" : "READ-ONLY");
203 core_update_device_list_for_node(lun, NULL, lun->unpacked_lun,
204 lun_access, acl, tpg, 1);
205 spin_lock(&tpg->tpg_lun_lock);
207 spin_unlock(&tpg->tpg_lun_lock);
210 /* core_set_queue_depth_for_node():
214 static int core_set_queue_depth_for_node(
215 struct se_portal_group *tpg,
216 struct se_node_acl *acl)
218 if (!acl->queue_depth) {
219 pr_err("Queue depth for %s Initiator Node: %s is 0,"
220 "defaulting to 1.\n", tpg->se_tpg_tfo->get_fabric_name(),
222 acl->queue_depth = 1;
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 = kzalloc(sizeof(struct se_dev_entry) *
238 TRANSPORT_MAX_LUNS_PER_TPG, 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 spin_lock_init(&acl->device_list_lock);
281 spin_lock_init(&acl->nacl_sess_lock);
282 atomic_set(&acl->acl_pr_ref_count, 0);
283 acl->queue_depth = tpg->se_tpg_tfo->tpg_get_default_depth(tpg);
284 snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
286 acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX);
287 spin_lock_init(&acl->stats_lock);
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 explictly 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))
311 core_tpg_add_node_to_devs(acl, tpg);
313 spin_lock_irq(&tpg->acl_node_lock);
314 list_add_tail(&acl->acl_list, &tpg->acl_node_list);
315 tpg->num_node_acls++;
316 spin_unlock_irq(&tpg->acl_node_lock);
318 pr_debug("%s_TPG[%u] - Added DYNAMIC ACL with TCQ Depth: %d for %s"
319 " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
320 tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth,
321 tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
325 EXPORT_SYMBOL(core_tpg_check_initiator_node_acl);
327 void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl)
329 while (atomic_read(&nacl->acl_pr_ref_count) != 0)
333 void core_tpg_clear_object_luns(struct se_portal_group *tpg)
338 spin_lock(&tpg->tpg_lun_lock);
339 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
340 lun = &tpg->tpg_lun_list[i];
342 if ((lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) ||
343 (lun->lun_se_dev == NULL))
346 spin_unlock(&tpg->tpg_lun_lock);
347 ret = core_dev_del_lun(tpg, lun->unpacked_lun);
348 spin_lock(&tpg->tpg_lun_lock);
350 spin_unlock(&tpg->tpg_lun_lock);
352 EXPORT_SYMBOL(core_tpg_clear_object_luns);
354 /* core_tpg_add_initiator_node_acl():
358 struct se_node_acl *core_tpg_add_initiator_node_acl(
359 struct se_portal_group *tpg,
360 struct se_node_acl *se_nacl,
361 const char *initiatorname,
364 struct se_node_acl *acl = NULL;
366 spin_lock_irq(&tpg->acl_node_lock);
367 acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
369 if (acl->dynamic_node_acl) {
370 acl->dynamic_node_acl = 0;
371 pr_debug("%s_TPG[%u] - Replacing dynamic ACL"
372 " for %s\n", tpg->se_tpg_tfo->get_fabric_name(),
373 tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname);
374 spin_unlock_irq(&tpg->acl_node_lock);
376 * Release the locally allocated struct se_node_acl
377 * because * core_tpg_add_initiator_node_acl() returned
378 * a pointer to an existing demo mode node ACL.
381 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg,
386 pr_err("ACL entry for %s Initiator"
387 " Node %s already exists for TPG %u, ignoring"
388 " request.\n", tpg->se_tpg_tfo->get_fabric_name(),
389 initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg));
390 spin_unlock_irq(&tpg->acl_node_lock);
391 return ERR_PTR(-EEXIST);
393 spin_unlock_irq(&tpg->acl_node_lock);
396 pr_err("struct se_node_acl pointer is NULL\n");
397 return ERR_PTR(-EINVAL);
400 * For v4.x logic the se_node_acl_s is hanging off a fabric
401 * dependent structure allocated via
402 * struct target_core_fabric_ops->fabric_make_nodeacl()
406 INIT_LIST_HEAD(&acl->acl_list);
407 INIT_LIST_HEAD(&acl->acl_sess_list);
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);
415 spin_lock_init(&acl->stats_lock);
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 struct se_session *sess, *sess_tmp;
457 spin_lock_irq(&tpg->acl_node_lock);
458 if (acl->dynamic_node_acl) {
459 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_bh(&tpg->session_lock);
467 list_for_each_entry_safe(sess, sess_tmp,
468 &tpg->tpg_sess_list, sess_list) {
469 if (sess->se_node_acl != acl)
472 * Determine if the session needs to be closed by our context.
474 if (!tpg->se_tpg_tfo->shutdown_session(sess))
477 spin_unlock_bh(&tpg->session_lock);
479 * If the $FABRIC_MOD session for the Initiator Node ACL exists,
480 * forcefully shutdown the $FABRIC_MOD session/nexus.
482 tpg->se_tpg_tfo->close_session(sess);
484 spin_lock_bh(&tpg->session_lock);
486 spin_unlock_bh(&tpg->session_lock);
488 core_tpg_wait_for_nacl_pr_ref(acl);
489 core_clear_initiator_node_from_tpg(acl, tpg);
490 core_free_device_list_for_node(acl, tpg);
492 pr_debug("%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s"
493 " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
494 tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth,
495 tpg->se_tpg_tfo->get_fabric_name(), acl->initiatorname);
499 EXPORT_SYMBOL(core_tpg_del_initiator_node_acl);
501 /* core_tpg_set_initiator_node_queue_depth():
505 int core_tpg_set_initiator_node_queue_depth(
506 struct se_portal_group *tpg,
507 unsigned char *initiatorname,
511 struct se_session *sess, *init_sess = NULL;
512 struct se_node_acl *acl;
515 spin_lock_irq(&tpg->acl_node_lock);
516 acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
518 pr_err("Access Control List entry for %s Initiator"
519 " Node %s does not exists for TPG %hu, ignoring"
520 " request.\n", tpg->se_tpg_tfo->get_fabric_name(),
521 initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg));
522 spin_unlock_irq(&tpg->acl_node_lock);
525 if (acl->dynamic_node_acl) {
526 acl->dynamic_node_acl = 0;
529 spin_unlock_irq(&tpg->acl_node_lock);
531 spin_lock_bh(&tpg->session_lock);
532 list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) {
533 if (sess->se_node_acl != acl)
537 pr_err("Unable to change queue depth for %s"
538 " Initiator Node: %s while session is"
539 " operational. To forcefully change the queue"
540 " depth and force session reinstatement"
541 " use the \"force=1\" parameter.\n",
542 tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
543 spin_unlock_bh(&tpg->session_lock);
545 spin_lock_irq(&tpg->acl_node_lock);
547 acl->dynamic_node_acl = 1;
548 spin_unlock_irq(&tpg->acl_node_lock);
552 * Determine if the session needs to be closed by our context.
554 if (!tpg->se_tpg_tfo->shutdown_session(sess))
562 * User has requested to change the queue depth for a Initiator Node.
563 * Change the value in the Node's struct se_node_acl, and call
564 * core_set_queue_depth_for_node() to add the requested queue depth.
566 * Finally call tpg->se_tpg_tfo->close_session() to force session
567 * reinstatement to occur if there is an active session for the
568 * $FABRIC_MOD Initiator Node in question.
570 acl->queue_depth = queue_depth;
572 if (core_set_queue_depth_for_node(tpg, acl) < 0) {
573 spin_unlock_bh(&tpg->session_lock);
575 * Force session reinstatement if
576 * core_set_queue_depth_for_node() failed, because we assume
577 * the $FABRIC_MOD has already the set session reinstatement
578 * bit from tpg->se_tpg_tfo->shutdown_session() called above.
581 tpg->se_tpg_tfo->close_session(init_sess);
583 spin_lock_irq(&tpg->acl_node_lock);
585 acl->dynamic_node_acl = 1;
586 spin_unlock_irq(&tpg->acl_node_lock);
589 spin_unlock_bh(&tpg->session_lock);
591 * If the $FABRIC_MOD session for the Initiator Node ACL exists,
592 * forcefully shutdown the $FABRIC_MOD session/nexus.
595 tpg->se_tpg_tfo->close_session(init_sess);
597 pr_debug("Successfully changed queue depth to: %d for Initiator"
598 " Node: %s on %s Target Portal Group: %u\n", queue_depth,
599 initiatorname, tpg->se_tpg_tfo->get_fabric_name(),
600 tpg->se_tpg_tfo->tpg_get_tag(tpg));
602 spin_lock_irq(&tpg->acl_node_lock);
604 acl->dynamic_node_acl = 1;
605 spin_unlock_irq(&tpg->acl_node_lock);
609 EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth);
611 static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg)
613 /* Set in core_dev_setup_virtual_lun0() */
614 struct se_device *dev = g_lun0_dev;
615 struct se_lun *lun = &se_tpg->tpg_virt_lun0;
616 u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
619 lun->unpacked_lun = 0;
620 lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
621 atomic_set(&lun->lun_acl_count, 0);
622 init_completion(&lun->lun_shutdown_comp);
623 INIT_LIST_HEAD(&lun->lun_acl_list);
624 INIT_LIST_HEAD(&lun->lun_cmd_list);
625 spin_lock_init(&lun->lun_acl_lock);
626 spin_lock_init(&lun->lun_cmd_lock);
627 spin_lock_init(&lun->lun_sep_lock);
629 ret = core_tpg_post_addlun(se_tpg, lun, lun_access, dev);
636 static void core_tpg_release_virtual_lun0(struct se_portal_group *se_tpg)
638 struct se_lun *lun = &se_tpg->tpg_virt_lun0;
640 core_tpg_post_dellun(se_tpg, lun);
643 int core_tpg_register(
644 struct target_core_fabric_ops *tfo,
645 struct se_wwn *se_wwn,
646 struct se_portal_group *se_tpg,
647 void *tpg_fabric_ptr,
653 se_tpg->tpg_lun_list = kzalloc((sizeof(struct se_lun) *
654 TRANSPORT_MAX_LUNS_PER_TPG), GFP_KERNEL);
655 if (!se_tpg->tpg_lun_list) {
656 pr_err("Unable to allocate struct se_portal_group->"
661 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
662 lun = &se_tpg->tpg_lun_list[i];
663 lun->unpacked_lun = i;
664 lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
665 atomic_set(&lun->lun_acl_count, 0);
666 init_completion(&lun->lun_shutdown_comp);
667 INIT_LIST_HEAD(&lun->lun_acl_list);
668 INIT_LIST_HEAD(&lun->lun_cmd_list);
669 spin_lock_init(&lun->lun_acl_lock);
670 spin_lock_init(&lun->lun_cmd_lock);
671 spin_lock_init(&lun->lun_sep_lock);
674 se_tpg->se_tpg_type = se_tpg_type;
675 se_tpg->se_tpg_fabric_ptr = tpg_fabric_ptr;
676 se_tpg->se_tpg_tfo = tfo;
677 se_tpg->se_tpg_wwn = se_wwn;
678 atomic_set(&se_tpg->tpg_pr_ref_count, 0);
679 INIT_LIST_HEAD(&se_tpg->acl_node_list);
680 INIT_LIST_HEAD(&se_tpg->se_tpg_node);
681 INIT_LIST_HEAD(&se_tpg->tpg_sess_list);
682 spin_lock_init(&se_tpg->acl_node_lock);
683 spin_lock_init(&se_tpg->session_lock);
684 spin_lock_init(&se_tpg->tpg_lun_lock);
686 if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) {
687 if (core_tpg_setup_virtual_lun0(se_tpg) < 0) {
693 spin_lock_bh(&tpg_lock);
694 list_add_tail(&se_tpg->se_tpg_node, &tpg_list);
695 spin_unlock_bh(&tpg_lock);
697 pr_debug("TARGET_CORE[%s]: Allocated %s struct se_portal_group for"
698 " endpoint: %s, Portal Tag: %u\n", tfo->get_fabric_name(),
699 (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ?
700 "Normal" : "Discovery", (tfo->tpg_get_wwn(se_tpg) == NULL) ?
701 "None" : tfo->tpg_get_wwn(se_tpg), tfo->tpg_get_tag(se_tpg));
705 EXPORT_SYMBOL(core_tpg_register);
707 int core_tpg_deregister(struct se_portal_group *se_tpg)
709 struct se_node_acl *nacl, *nacl_tmp;
711 pr_debug("TARGET_CORE[%s]: Deallocating %s struct se_portal_group"
712 " for endpoint: %s Portal Tag %u\n",
713 (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ?
714 "Normal" : "Discovery", se_tpg->se_tpg_tfo->get_fabric_name(),
715 se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg),
716 se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg));
718 spin_lock_bh(&tpg_lock);
719 list_del(&se_tpg->se_tpg_node);
720 spin_unlock_bh(&tpg_lock);
722 while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0)
725 * Release any remaining demo-mode generated se_node_acl that have
726 * not been released because of TFO->tpg_check_demo_mode_cache() == 1
727 * in transport_deregister_session().
729 spin_lock_irq(&se_tpg->acl_node_lock);
730 list_for_each_entry_safe(nacl, nacl_tmp, &se_tpg->acl_node_list,
732 list_del(&nacl->acl_list);
733 se_tpg->num_node_acls--;
734 spin_unlock_irq(&se_tpg->acl_node_lock);
736 core_tpg_wait_for_nacl_pr_ref(nacl);
737 core_free_device_list_for_node(nacl, se_tpg);
738 se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, nacl);
740 spin_lock_irq(&se_tpg->acl_node_lock);
742 spin_unlock_irq(&se_tpg->acl_node_lock);
744 if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL)
745 core_tpg_release_virtual_lun0(se_tpg);
747 se_tpg->se_tpg_fabric_ptr = NULL;
748 kfree(se_tpg->tpg_lun_list);
751 EXPORT_SYMBOL(core_tpg_deregister);
753 struct se_lun *core_tpg_pre_addlun(
754 struct se_portal_group *tpg,
759 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
760 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG"
761 "-1: %u for Target Portal Group: %u\n",
762 tpg->se_tpg_tfo->get_fabric_name(),
763 unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1,
764 tpg->se_tpg_tfo->tpg_get_tag(tpg));
765 return ERR_PTR(-EOVERFLOW);
768 spin_lock(&tpg->tpg_lun_lock);
769 lun = &tpg->tpg_lun_list[unpacked_lun];
770 if (lun->lun_status == TRANSPORT_LUN_STATUS_ACTIVE) {
771 pr_err("TPG Logical Unit Number: %u is already active"
772 " on %s Target Portal Group: %u, ignoring request.\n",
773 unpacked_lun, tpg->se_tpg_tfo->get_fabric_name(),
774 tpg->se_tpg_tfo->tpg_get_tag(tpg));
775 spin_unlock(&tpg->tpg_lun_lock);
776 return ERR_PTR(-EINVAL);
778 spin_unlock(&tpg->tpg_lun_lock);
783 int core_tpg_post_addlun(
784 struct se_portal_group *tpg,
791 ret = core_dev_export(lun_ptr, tpg, lun);
795 spin_lock(&tpg->tpg_lun_lock);
796 lun->lun_access = lun_access;
797 lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE;
798 spin_unlock(&tpg->tpg_lun_lock);
803 static void core_tpg_shutdown_lun(
804 struct se_portal_group *tpg,
807 core_clear_lun_from_tpg(lun, tpg);
808 transport_clear_lun_from_sessions(lun);
811 struct se_lun *core_tpg_pre_dellun(
812 struct se_portal_group *tpg,
818 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
819 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG"
820 "-1: %u for Target Portal Group: %u\n",
821 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
822 TRANSPORT_MAX_LUNS_PER_TPG-1,
823 tpg->se_tpg_tfo->tpg_get_tag(tpg));
824 return ERR_PTR(-EOVERFLOW);
827 spin_lock(&tpg->tpg_lun_lock);
828 lun = &tpg->tpg_lun_list[unpacked_lun];
829 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
830 pr_err("%s Logical Unit Number: %u is not active on"
831 " Target Portal Group: %u, ignoring request.\n",
832 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
833 tpg->se_tpg_tfo->tpg_get_tag(tpg));
834 spin_unlock(&tpg->tpg_lun_lock);
835 return ERR_PTR(-ENODEV);
837 spin_unlock(&tpg->tpg_lun_lock);
842 int core_tpg_post_dellun(
843 struct se_portal_group *tpg,
846 core_tpg_shutdown_lun(tpg, 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);