1 /*******************************************************************************
2 * Filename: target_core_device.c (based on iscsi_target_device.c)
4 * This file contains the TCM Virtual Device and Disk Transport
5 * agnostic related functions.
7 * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
8 * Copyright (c) 2005-2006 SBE, Inc. All Rights Reserved.
9 * Copyright (c) 2007-2010 Rising Tide Systems
10 * Copyright (c) 2008-2010 Linux-iSCSI.org
12 * Nicholas A. Bellinger <nab@kernel.org>
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
28 ******************************************************************************/
30 #include <linux/net.h>
31 #include <linux/string.h>
32 #include <linux/delay.h>
33 #include <linux/timer.h>
34 #include <linux/slab.h>
35 #include <linux/spinlock.h>
36 #include <linux/kthread.h>
38 #include <linux/export.h>
41 #include <scsi/scsi.h>
42 #include <scsi/scsi_device.h>
44 #include <target/target_core_base.h>
45 #include <target/target_core_device.h>
46 #include <target/target_core_tpg.h>
47 #include <target/target_core_transport.h>
48 #include <target/target_core_fabric_ops.h>
50 #include "target_core_alua.h"
51 #include "target_core_hba.h"
52 #include "target_core_pr.h"
53 #include "target_core_ua.h"
55 static void se_dev_start(struct se_device *dev);
56 static void se_dev_stop(struct se_device *dev);
58 static struct se_hba *lun0_hba;
59 static struct se_subsystem_dev *lun0_su_dev;
60 /* not static, needed by tpg.c */
61 struct se_device *g_lun0_dev;
63 int transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
65 struct se_lun *se_lun = NULL;
66 struct se_session *se_sess = se_cmd->se_sess;
67 struct se_device *dev;
70 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
71 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
72 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
76 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
77 se_cmd->se_deve = &se_sess->se_node_acl->device_list[unpacked_lun];
78 if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
79 struct se_dev_entry *deve = se_cmd->se_deve;
82 deve->total_bytes += se_cmd->data_length;
84 if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
85 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
86 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
87 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
88 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
89 " Access for 0x%08x\n",
90 se_cmd->se_tfo->get_fabric_name(),
92 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
96 if (se_cmd->data_direction == DMA_TO_DEVICE)
97 deve->write_bytes += se_cmd->data_length;
98 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
99 deve->read_bytes += se_cmd->data_length;
103 se_lun = deve->se_lun;
104 se_cmd->se_lun = deve->se_lun;
105 se_cmd->pr_res_key = deve->pr_res_key;
106 se_cmd->orig_fe_lun = unpacked_lun;
107 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
109 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
113 * Use the se_portal_group->tpg_virt_lun0 to allow for
114 * REPORT_LUNS, et al to be returned when no active
115 * MappedLUN=0 exists for this Initiator Port.
117 if (unpacked_lun != 0) {
118 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
119 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
120 pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
121 " Access for 0x%08x\n",
122 se_cmd->se_tfo->get_fabric_name(),
127 * Force WRITE PROTECT for virtual LUN 0
129 if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
130 (se_cmd->data_direction != DMA_NONE)) {
131 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
132 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
136 se_lun = &se_sess->se_tpg->tpg_virt_lun0;
137 se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
138 se_cmd->orig_fe_lun = 0;
139 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
142 * Determine if the struct se_lun is online.
143 * FIXME: Check for LUN_RESET + UNIT Attention
145 if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
146 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
147 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
151 /* Directly associate cmd with se_dev */
152 se_cmd->se_dev = se_lun->lun_se_dev;
154 /* TODO: get rid of this and use atomics for stats */
155 dev = se_lun->lun_se_dev;
156 spin_lock_irqsave(&dev->stats_lock, flags);
158 if (se_cmd->data_direction == DMA_TO_DEVICE)
159 dev->write_bytes += se_cmd->data_length;
160 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
161 dev->read_bytes += se_cmd->data_length;
162 spin_unlock_irqrestore(&dev->stats_lock, flags);
165 * Add the iscsi_cmd_t to the struct se_lun's cmd list. This list is used
166 * for tracking state of struct se_cmds during LUN shutdown events.
168 spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
169 list_add_tail(&se_cmd->se_lun_node, &se_lun->lun_cmd_list);
170 atomic_set(&se_cmd->transport_lun_active, 1);
171 spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);
175 EXPORT_SYMBOL(transport_lookup_cmd_lun);
177 int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
179 struct se_dev_entry *deve;
180 struct se_lun *se_lun = NULL;
181 struct se_session *se_sess = se_cmd->se_sess;
182 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
185 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
186 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
187 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
191 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
192 se_cmd->se_deve = &se_sess->se_node_acl->device_list[unpacked_lun];
193 deve = se_cmd->se_deve;
195 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
196 se_tmr->tmr_lun = deve->se_lun;
197 se_cmd->se_lun = deve->se_lun;
198 se_lun = deve->se_lun;
199 se_cmd->pr_res_key = deve->pr_res_key;
200 se_cmd->orig_fe_lun = unpacked_lun;
202 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
205 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
206 " Access for 0x%08x\n",
207 se_cmd->se_tfo->get_fabric_name(),
209 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
213 * Determine if the struct se_lun is online.
214 * FIXME: Check for LUN_RESET + UNIT Attention
216 if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
217 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
221 /* Directly associate cmd with se_dev */
222 se_cmd->se_dev = se_lun->lun_se_dev;
223 se_tmr->tmr_dev = se_lun->lun_se_dev;
225 spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags);
226 list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list);
227 spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags);
231 EXPORT_SYMBOL(transport_lookup_tmr_lun);
234 * This function is called from core_scsi3_emulate_pro_register_and_move()
235 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
236 * when a matching rtpi is found.
238 struct se_dev_entry *core_get_se_deve_from_rtpi(
239 struct se_node_acl *nacl,
242 struct se_dev_entry *deve;
244 struct se_port *port;
245 struct se_portal_group *tpg = nacl->se_tpg;
248 spin_lock_irq(&nacl->device_list_lock);
249 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
250 deve = &nacl->device_list[i];
252 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
257 pr_err("%s device entries device pointer is"
258 " NULL, but Initiator has access.\n",
259 tpg->se_tpg_tfo->get_fabric_name());
264 pr_err("%s device entries device pointer is"
265 " NULL, but Initiator has access.\n",
266 tpg->se_tpg_tfo->get_fabric_name());
269 if (port->sep_rtpi != rtpi)
272 atomic_inc(&deve->pr_ref_count);
273 smp_mb__after_atomic_inc();
274 spin_unlock_irq(&nacl->device_list_lock);
278 spin_unlock_irq(&nacl->device_list_lock);
283 int core_free_device_list_for_node(
284 struct se_node_acl *nacl,
285 struct se_portal_group *tpg)
287 struct se_dev_entry *deve;
291 if (!nacl->device_list)
294 spin_lock_irq(&nacl->device_list_lock);
295 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
296 deve = &nacl->device_list[i];
298 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
302 pr_err("%s device entries device pointer is"
303 " NULL, but Initiator has access.\n",
304 tpg->se_tpg_tfo->get_fabric_name());
309 spin_unlock_irq(&nacl->device_list_lock);
310 core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
311 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
312 spin_lock_irq(&nacl->device_list_lock);
314 spin_unlock_irq(&nacl->device_list_lock);
316 kfree(nacl->device_list);
317 nacl->device_list = NULL;
322 void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd)
324 struct se_dev_entry *deve;
326 spin_lock_irq(&se_nacl->device_list_lock);
327 deve = &se_nacl->device_list[se_cmd->orig_fe_lun];
329 spin_unlock_irq(&se_nacl->device_list_lock);
332 void core_update_device_list_access(
335 struct se_node_acl *nacl)
337 struct se_dev_entry *deve;
339 spin_lock_irq(&nacl->device_list_lock);
340 deve = &nacl->device_list[mapped_lun];
341 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
342 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
343 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
345 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
346 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
348 spin_unlock_irq(&nacl->device_list_lock);
351 /* core_update_device_list_for_node():
355 int core_update_device_list_for_node(
357 struct se_lun_acl *lun_acl,
360 struct se_node_acl *nacl,
361 struct se_portal_group *tpg,
364 struct se_port *port = lun->lun_sep;
365 struct se_dev_entry *deve = &nacl->device_list[mapped_lun];
368 * If the MappedLUN entry is being disabled, the entry in
369 * port->sep_alua_list must be removed now before clearing the
370 * struct se_dev_entry pointers below as logic in
371 * core_alua_do_transition_tg_pt() depends on these being present.
375 * deve->se_lun_acl will be NULL for demo-mode created LUNs
376 * that have not been explicitly concerted to MappedLUNs ->
377 * struct se_lun_acl, but we remove deve->alua_port_list from
378 * port->sep_alua_list. This also means that active UAs and
379 * NodeACL context specific PR metadata for demo-mode
380 * MappedLUN *deve will be released below..
382 spin_lock_bh(&port->sep_alua_lock);
383 list_del(&deve->alua_port_list);
384 spin_unlock_bh(&port->sep_alua_lock);
387 spin_lock_irq(&nacl->device_list_lock);
390 * Check if the call is handling demo mode -> explict LUN ACL
391 * transition. This transition must be for the same struct se_lun
392 * + mapped_lun that was setup in demo mode..
394 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
395 if (deve->se_lun_acl != NULL) {
396 pr_err("struct se_dev_entry->se_lun_acl"
397 " already set for demo mode -> explict"
398 " LUN ACL transition\n");
399 spin_unlock_irq(&nacl->device_list_lock);
402 if (deve->se_lun != lun) {
403 pr_err("struct se_dev_entry->se_lun does"
404 " match passed struct se_lun for demo mode"
405 " -> explict LUN ACL transition\n");
406 spin_unlock_irq(&nacl->device_list_lock);
409 deve->se_lun_acl = lun_acl;
413 deve->se_lun_acl = lun_acl;
414 deve->mapped_lun = mapped_lun;
415 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
418 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
419 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
420 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
422 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
423 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
427 spin_unlock_irq(&nacl->device_list_lock);
430 deve->creation_time = get_jiffies_64();
431 deve->attach_count++;
432 spin_unlock_irq(&nacl->device_list_lock);
434 spin_lock_bh(&port->sep_alua_lock);
435 list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
436 spin_unlock_bh(&port->sep_alua_lock);
441 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
442 * PR operation to complete.
444 spin_unlock_irq(&nacl->device_list_lock);
445 while (atomic_read(&deve->pr_ref_count) != 0)
447 spin_lock_irq(&nacl->device_list_lock);
449 * Disable struct se_dev_entry LUN ACL mapping
451 core_scsi3_ua_release_all(deve);
453 deve->se_lun_acl = NULL;
455 deve->creation_time = 0;
456 deve->attach_count--;
457 spin_unlock_irq(&nacl->device_list_lock);
459 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
463 /* core_clear_lun_from_tpg():
467 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
469 struct se_node_acl *nacl;
470 struct se_dev_entry *deve;
473 spin_lock_irq(&tpg->acl_node_lock);
474 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
475 spin_unlock_irq(&tpg->acl_node_lock);
477 spin_lock_irq(&nacl->device_list_lock);
478 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
479 deve = &nacl->device_list[i];
480 if (lun != deve->se_lun)
482 spin_unlock_irq(&nacl->device_list_lock);
484 core_update_device_list_for_node(lun, NULL,
485 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
488 spin_lock_irq(&nacl->device_list_lock);
490 spin_unlock_irq(&nacl->device_list_lock);
492 spin_lock_irq(&tpg->acl_node_lock);
494 spin_unlock_irq(&tpg->acl_node_lock);
497 static struct se_port *core_alloc_port(struct se_device *dev)
499 struct se_port *port, *port_tmp;
501 port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
503 pr_err("Unable to allocate struct se_port\n");
504 return ERR_PTR(-ENOMEM);
506 INIT_LIST_HEAD(&port->sep_alua_list);
507 INIT_LIST_HEAD(&port->sep_list);
508 atomic_set(&port->sep_tg_pt_secondary_offline, 0);
509 spin_lock_init(&port->sep_alua_lock);
510 mutex_init(&port->sep_tg_pt_md_mutex);
512 spin_lock(&dev->se_port_lock);
513 if (dev->dev_port_count == 0x0000ffff) {
514 pr_warn("Reached dev->dev_port_count =="
516 spin_unlock(&dev->se_port_lock);
517 return ERR_PTR(-ENOSPC);
521 * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device
522 * Here is the table from spc4r17 section 7.7.3.8.
524 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
528 * 1h Relative port 1, historically known as port A
529 * 2h Relative port 2, historically known as port B
530 * 3h to FFFFh Relative port 3 through 65 535
532 port->sep_rtpi = dev->dev_rpti_counter++;
536 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
538 * Make sure RELATIVE TARGET PORT IDENTIFER is unique
541 if (port->sep_rtpi == port_tmp->sep_rtpi)
544 spin_unlock(&dev->se_port_lock);
549 static void core_export_port(
550 struct se_device *dev,
551 struct se_portal_group *tpg,
552 struct se_port *port,
555 struct se_subsystem_dev *su_dev = dev->se_sub_dev;
556 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
558 spin_lock(&dev->se_port_lock);
559 spin_lock(&lun->lun_sep_lock);
563 spin_unlock(&lun->lun_sep_lock);
565 list_add_tail(&port->sep_list, &dev->dev_sep_list);
566 spin_unlock(&dev->se_port_lock);
568 if (su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) {
569 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
570 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
571 pr_err("Unable to allocate t10_alua_tg_pt"
575 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
576 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
577 su_dev->t10_alua.default_tg_pt_gp);
578 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
579 pr_debug("%s/%s: Adding to default ALUA Target Port"
580 " Group: alua/default_tg_pt_gp\n",
581 dev->transport->name, tpg->se_tpg_tfo->get_fabric_name());
584 dev->dev_port_count++;
585 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */
589 * Called with struct se_device->se_port_lock spinlock held.
591 static void core_release_port(struct se_device *dev, struct se_port *port)
592 __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock)
595 * Wait for any port reference for PR ALL_TG_PT=1 operation
596 * to complete in __core_scsi3_alloc_registration()
598 spin_unlock(&dev->se_port_lock);
599 if (atomic_read(&port->sep_tg_pt_ref_cnt))
601 spin_lock(&dev->se_port_lock);
603 core_alua_free_tg_pt_gp_mem(port);
605 list_del(&port->sep_list);
606 dev->dev_port_count--;
611 struct se_device *dev,
612 struct se_portal_group *tpg,
615 struct se_port *port;
617 port = core_alloc_port(dev);
619 return PTR_ERR(port);
621 lun->lun_se_dev = dev;
624 atomic_inc(&dev->dev_export_obj.obj_access_count);
625 core_export_port(dev, tpg, port, lun);
629 void core_dev_unexport(
630 struct se_device *dev,
631 struct se_portal_group *tpg,
634 struct se_port *port = lun->lun_sep;
636 spin_lock(&lun->lun_sep_lock);
637 if (lun->lun_se_dev == NULL) {
638 spin_unlock(&lun->lun_sep_lock);
641 spin_unlock(&lun->lun_sep_lock);
643 spin_lock(&dev->se_port_lock);
644 atomic_dec(&dev->dev_export_obj.obj_access_count);
645 core_release_port(dev, port);
646 spin_unlock(&dev->se_port_lock);
650 lun->lun_se_dev = NULL;
653 int target_report_luns(struct se_task *se_task)
655 struct se_cmd *se_cmd = se_task->task_se_cmd;
656 struct se_dev_entry *deve;
657 struct se_lun *se_lun;
658 struct se_session *se_sess = se_cmd->se_sess;
660 u32 cdb_offset = 0, lun_count = 0, offset = 8, i;
662 buf = transport_kmap_data_sg(se_cmd);
667 * If no struct se_session pointer is present, this struct se_cmd is
668 * coming via a target_core_mod PASSTHROUGH op, and not through
669 * a $FABRIC_MOD. In that case, report LUN=0 only.
674 spin_lock_irq(&se_sess->se_node_acl->device_list_lock);
675 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
676 deve = &se_sess->se_node_acl->device_list[i];
677 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
679 se_lun = deve->se_lun;
681 * We determine the correct LUN LIST LENGTH even once we
682 * have reached the initial allocation length.
686 if ((cdb_offset + 8) >= se_cmd->data_length)
689 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]);
693 spin_unlock_irq(&se_sess->se_node_acl->device_list_lock);
696 * See SPC3 r07, page 159.
700 * If no LUNs are accessible, report virtual LUN 0.
702 if (lun_count == 0) {
703 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]);
708 buf[0] = ((lun_count >> 24) & 0xff);
709 buf[1] = ((lun_count >> 16) & 0xff);
710 buf[2] = ((lun_count >> 8) & 0xff);
711 buf[3] = (lun_count & 0xff);
712 transport_kunmap_data_sg(se_cmd);
714 se_task->task_scsi_status = GOOD;
715 transport_complete_task(se_task, 1);
719 /* se_release_device_for_hba():
723 void se_release_device_for_hba(struct se_device *dev)
725 struct se_hba *hba = dev->se_hba;
727 if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
728 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) ||
729 (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) ||
730 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) ||
731 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED))
735 kthread_stop(dev->process_thread);
736 if (dev->transport->free_device)
737 dev->transport->free_device(dev->dev_ptr);
740 spin_lock(&hba->device_lock);
741 list_del(&dev->dev_list);
743 spin_unlock(&hba->device_lock);
745 core_scsi3_free_all_registrations(dev);
746 se_release_vpd_for_dev(dev);
751 void se_release_vpd_for_dev(struct se_device *dev)
753 struct t10_vpd *vpd, *vpd_tmp;
755 spin_lock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
756 list_for_each_entry_safe(vpd, vpd_tmp,
757 &dev->se_sub_dev->t10_wwn.t10_vpd_list, vpd_list) {
758 list_del(&vpd->vpd_list);
761 spin_unlock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
764 /* se_free_virtual_device():
766 * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers.
768 int se_free_virtual_device(struct se_device *dev, struct se_hba *hba)
770 if (!list_empty(&dev->dev_sep_list))
773 core_alua_free_lu_gp_mem(dev);
774 se_release_device_for_hba(dev);
779 static void se_dev_start(struct se_device *dev)
781 struct se_hba *hba = dev->se_hba;
783 spin_lock(&hba->device_lock);
784 atomic_inc(&dev->dev_obj.obj_access_count);
785 if (atomic_read(&dev->dev_obj.obj_access_count) == 1) {
786 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) {
787 dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED;
788 dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED;
789 } else if (dev->dev_status &
790 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) {
792 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
793 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
796 spin_unlock(&hba->device_lock);
799 static void se_dev_stop(struct se_device *dev)
801 struct se_hba *hba = dev->se_hba;
803 spin_lock(&hba->device_lock);
804 atomic_dec(&dev->dev_obj.obj_access_count);
805 if (atomic_read(&dev->dev_obj.obj_access_count) == 0) {
806 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) {
807 dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED;
808 dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED;
809 } else if (dev->dev_status &
810 TRANSPORT_DEVICE_OFFLINE_ACTIVATED) {
811 dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
812 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
815 spin_unlock(&hba->device_lock);
818 int se_dev_check_online(struct se_device *dev)
823 spin_lock_irqsave(&dev->dev_status_lock, flags);
824 ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
825 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1;
826 spin_unlock_irqrestore(&dev->dev_status_lock, flags);
831 int se_dev_check_shutdown(struct se_device *dev)
835 spin_lock_irq(&dev->dev_status_lock);
836 ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN);
837 spin_unlock_irq(&dev->dev_status_lock);
842 u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
844 u32 aligned_max_sectors;
847 * Limit max_sectors to a PAGE_SIZE aligned value for modern
848 * transport_allocate_data_tasks() operation.
850 alignment = max(1ul, PAGE_SIZE / block_size);
851 aligned_max_sectors = rounddown(max_sectors, alignment);
853 if (max_sectors != aligned_max_sectors)
854 pr_info("Rounding down aligned max_sectors from %u to %u\n",
855 max_sectors, aligned_max_sectors);
857 return aligned_max_sectors;
860 void se_dev_set_default_attribs(
861 struct se_device *dev,
862 struct se_dev_limits *dev_limits)
864 struct queue_limits *limits = &dev_limits->limits;
866 dev->se_sub_dev->se_dev_attrib.emulate_dpo = DA_EMULATE_DPO;
867 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
868 dev->se_sub_dev->se_dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
869 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
870 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
871 dev->se_sub_dev->se_dev_attrib.emulate_tas = DA_EMULATE_TAS;
872 dev->se_sub_dev->se_dev_attrib.emulate_tpu = DA_EMULATE_TPU;
873 dev->se_sub_dev->se_dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
874 dev->se_sub_dev->se_dev_attrib.emulate_reservations = DA_EMULATE_RESERVATIONS;
875 dev->se_sub_dev->se_dev_attrib.emulate_alua = DA_EMULATE_ALUA;
876 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
877 dev->se_sub_dev->se_dev_attrib.is_nonrot = DA_IS_NONROT;
878 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
880 * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK
881 * iblock_create_virtdevice() from struct queue_limits values
882 * if blk_queue_discard()==1
884 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
885 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
886 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
887 dev->se_sub_dev->se_dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
888 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment =
889 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
891 * block_size is based on subsystem plugin dependent requirements.
893 dev->se_sub_dev->se_dev_attrib.hw_block_size = limits->logical_block_size;
894 dev->se_sub_dev->se_dev_attrib.block_size = limits->logical_block_size;
896 * max_sectors is based on subsystem plugin dependent requirements.
898 dev->se_sub_dev->se_dev_attrib.hw_max_sectors = limits->max_hw_sectors;
900 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
902 limits->max_sectors = se_dev_align_max_sectors(limits->max_sectors,
903 limits->logical_block_size);
904 dev->se_sub_dev->se_dev_attrib.max_sectors = limits->max_sectors;
906 * Set optimal_sectors from max_sectors, which can be lowered via
909 dev->se_sub_dev->se_dev_attrib.optimal_sectors = limits->max_sectors;
911 * queue_depth is based on subsystem plugin dependent requirements.
913 dev->se_sub_dev->se_dev_attrib.hw_queue_depth = dev_limits->hw_queue_depth;
914 dev->se_sub_dev->se_dev_attrib.queue_depth = dev_limits->queue_depth;
917 int se_dev_set_max_unmap_lba_count(
918 struct se_device *dev,
919 u32 max_unmap_lba_count)
921 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = max_unmap_lba_count;
922 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n",
923 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count);
927 int se_dev_set_max_unmap_block_desc_count(
928 struct se_device *dev,
929 u32 max_unmap_block_desc_count)
931 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
932 max_unmap_block_desc_count;
933 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
934 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count);
938 int se_dev_set_unmap_granularity(
939 struct se_device *dev,
940 u32 unmap_granularity)
942 dev->se_sub_dev->se_dev_attrib.unmap_granularity = unmap_granularity;
943 pr_debug("dev[%p]: Set unmap_granularity: %u\n",
944 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity);
948 int se_dev_set_unmap_granularity_alignment(
949 struct se_device *dev,
950 u32 unmap_granularity_alignment)
952 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
953 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
954 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment);
958 int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
960 if (flag != 0 && flag != 1) {
961 pr_err("Illegal value %d\n", flag);
966 pr_err("dpo_emulated not supported\n");
973 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
975 if (flag != 0 && flag != 1) {
976 pr_err("Illegal value %d\n", flag);
980 if (flag && dev->transport->fua_write_emulated == 0) {
981 pr_err("fua_write_emulated not supported\n");
984 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = flag;
985 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
986 dev, dev->se_sub_dev->se_dev_attrib.emulate_fua_write);
990 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
992 if (flag != 0 && flag != 1) {
993 pr_err("Illegal value %d\n", flag);
998 pr_err("ua read emulated not supported\n");
1005 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
1007 if (flag != 0 && flag != 1) {
1008 pr_err("Illegal value %d\n", flag);
1011 if (flag && dev->transport->write_cache_emulated == 0) {
1012 pr_err("write_cache_emulated not supported\n");
1015 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = flag;
1016 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
1017 dev, dev->se_sub_dev->se_dev_attrib.emulate_write_cache);
1021 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
1023 if ((flag != 0) && (flag != 1) && (flag != 2)) {
1024 pr_err("Illegal value %d\n", flag);
1028 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1029 pr_err("dev[%p]: Unable to change SE Device"
1030 " UA_INTRLCK_CTRL while dev_export_obj: %d count"
1032 atomic_read(&dev->dev_export_obj.obj_access_count));
1035 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = flag;
1036 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
1037 dev, dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl);
1042 int se_dev_set_emulate_tas(struct se_device *dev, int flag)
1044 if ((flag != 0) && (flag != 1)) {
1045 pr_err("Illegal value %d\n", flag);
1049 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1050 pr_err("dev[%p]: Unable to change SE Device TAS while"
1051 " dev_export_obj: %d count exists\n", dev,
1052 atomic_read(&dev->dev_export_obj.obj_access_count));
1055 dev->se_sub_dev->se_dev_attrib.emulate_tas = flag;
1056 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
1057 dev, (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? "Enabled" : "Disabled");
1062 int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
1064 if ((flag != 0) && (flag != 1)) {
1065 pr_err("Illegal value %d\n", flag);
1069 * We expect this value to be non-zero when generic Block Layer
1070 * Discard supported is detected iblock_create_virtdevice().
1072 if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
1073 pr_err("Generic Block Discard not supported\n");
1077 dev->se_sub_dev->se_dev_attrib.emulate_tpu = flag;
1078 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
1083 int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
1085 if ((flag != 0) && (flag != 1)) {
1086 pr_err("Illegal value %d\n", flag);
1090 * We expect this value to be non-zero when generic Block Layer
1091 * Discard supported is detected iblock_create_virtdevice().
1093 if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
1094 pr_err("Generic Block Discard not supported\n");
1098 dev->se_sub_dev->se_dev_attrib.emulate_tpws = flag;
1099 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
1104 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
1106 if ((flag != 0) && (flag != 1)) {
1107 pr_err("Illegal value %d\n", flag);
1110 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = flag;
1111 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
1112 (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
1116 int se_dev_set_is_nonrot(struct se_device *dev, int flag)
1118 if ((flag != 0) && (flag != 1)) {
1119 printk(KERN_ERR "Illegal value %d\n", flag);
1122 dev->se_sub_dev->se_dev_attrib.is_nonrot = flag;
1123 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
1128 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
1131 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted"
1132 " reordering not implemented\n", dev);
1135 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = flag;
1136 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
1141 * Note, this can only be called on unexported SE Device Object.
1143 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
1145 u32 orig_queue_depth = dev->queue_depth;
1147 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1148 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1149 " dev_export_obj: %d count exists\n", dev,
1150 atomic_read(&dev->dev_export_obj.obj_access_count));
1154 pr_err("dev[%p]: Illegal ZERO value for queue"
1159 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1160 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
1161 pr_err("dev[%p]: Passed queue_depth: %u"
1162 " exceeds TCM/SE_Device TCQ: %u\n",
1164 dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
1168 if (queue_depth > dev->se_sub_dev->se_dev_attrib.queue_depth) {
1169 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
1170 pr_err("dev[%p]: Passed queue_depth:"
1171 " %u exceeds TCM/SE_Device MAX"
1172 " TCQ: %u\n", dev, queue_depth,
1173 dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
1179 dev->se_sub_dev->se_dev_attrib.queue_depth = dev->queue_depth = queue_depth;
1180 if (queue_depth > orig_queue_depth)
1181 atomic_add(queue_depth - orig_queue_depth, &dev->depth_left);
1182 else if (queue_depth < orig_queue_depth)
1183 atomic_sub(orig_queue_depth - queue_depth, &dev->depth_left);
1185 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
1190 int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors)
1192 int force = 0; /* Force setting for VDEVS */
1194 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1195 pr_err("dev[%p]: Unable to change SE Device"
1196 " max_sectors while dev_export_obj: %d count exists\n",
1197 dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1201 pr_err("dev[%p]: Illegal ZERO value for"
1202 " max_sectors\n", dev);
1205 if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
1206 pr_err("dev[%p]: Passed max_sectors: %u less than"
1207 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors,
1208 DA_STATUS_MAX_SECTORS_MIN);
1211 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1212 if (max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) {
1213 pr_err("dev[%p]: Passed max_sectors: %u"
1214 " greater than TCM/SE_Device max_sectors:"
1215 " %u\n", dev, max_sectors,
1216 dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
1220 if (!force && (max_sectors >
1221 dev->se_sub_dev->se_dev_attrib.hw_max_sectors)) {
1222 pr_err("dev[%p]: Passed max_sectors: %u"
1223 " greater than TCM/SE_Device max_sectors"
1224 ": %u, use force=1 to override.\n", dev,
1225 max_sectors, dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
1228 if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
1229 pr_err("dev[%p]: Passed max_sectors: %u"
1230 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1231 " %u\n", dev, max_sectors,
1232 DA_STATUS_MAX_SECTORS_MAX);
1237 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
1239 max_sectors = se_dev_align_max_sectors(max_sectors,
1240 dev->se_sub_dev->se_dev_attrib.block_size);
1242 dev->se_sub_dev->se_dev_attrib.max_sectors = max_sectors;
1243 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
1248 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
1250 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1251 pr_err("dev[%p]: Unable to change SE Device"
1252 " optimal_sectors while dev_export_obj: %d count exists\n",
1253 dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1256 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1257 pr_err("dev[%p]: Passed optimal_sectors cannot be"
1258 " changed for TCM/pSCSI\n", dev);
1261 if (optimal_sectors > dev->se_sub_dev->se_dev_attrib.max_sectors) {
1262 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1263 " greater than max_sectors: %u\n", dev,
1264 optimal_sectors, dev->se_sub_dev->se_dev_attrib.max_sectors);
1268 dev->se_sub_dev->se_dev_attrib.optimal_sectors = optimal_sectors;
1269 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1270 dev, optimal_sectors);
1274 int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1276 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1277 pr_err("dev[%p]: Unable to change SE Device block_size"
1278 " while dev_export_obj: %d count exists\n", dev,
1279 atomic_read(&dev->dev_export_obj.obj_access_count));
1283 if ((block_size != 512) &&
1284 (block_size != 1024) &&
1285 (block_size != 2048) &&
1286 (block_size != 4096)) {
1287 pr_err("dev[%p]: Illegal value for block_device: %u"
1288 " for SE device, must be 512, 1024, 2048 or 4096\n",
1293 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1294 pr_err("dev[%p]: Not allowed to change block_size for"
1295 " Physical Device, use for Linux/SCSI to change"
1296 " block_size for underlying hardware\n", dev);
1300 dev->se_sub_dev->se_dev_attrib.block_size = block_size;
1301 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1306 struct se_lun *core_dev_add_lun(
1307 struct se_portal_group *tpg,
1309 struct se_device *dev,
1312 struct se_lun *lun_p;
1315 if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) {
1316 pr_err("Unable to export struct se_device while dev_access_obj: %d\n",
1317 atomic_read(&dev->dev_access_obj.obj_access_count));
1321 lun_p = core_tpg_pre_addlun(tpg, lun);
1322 if ((IS_ERR(lun_p)) || !lun_p)
1325 if (dev->dev_flags & DF_READ_ONLY)
1326 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1328 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
1330 if (core_tpg_post_addlun(tpg, lun_p, lun_access, dev) < 0)
1333 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1334 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1335 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun,
1336 tpg->se_tpg_tfo->get_fabric_name(), hba->hba_id);
1338 * Update LUN maps for dynamically added initiators when
1339 * generate_node_acl is enabled.
1341 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
1342 struct se_node_acl *acl;
1343 spin_lock_irq(&tpg->acl_node_lock);
1344 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
1345 if (acl->dynamic_node_acl &&
1346 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
1347 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
1348 spin_unlock_irq(&tpg->acl_node_lock);
1349 core_tpg_add_node_to_devs(acl, tpg);
1350 spin_lock_irq(&tpg->acl_node_lock);
1353 spin_unlock_irq(&tpg->acl_node_lock);
1359 /* core_dev_del_lun():
1363 int core_dev_del_lun(
1364 struct se_portal_group *tpg,
1370 lun = core_tpg_pre_dellun(tpg, unpacked_lun, &ret);
1374 core_tpg_post_dellun(tpg, lun);
1376 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
1377 " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
1378 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun,
1379 tpg->se_tpg_tfo->get_fabric_name());
1384 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1388 spin_lock(&tpg->tpg_lun_lock);
1389 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1390 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1391 "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1392 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1393 TRANSPORT_MAX_LUNS_PER_TPG-1,
1394 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1395 spin_unlock(&tpg->tpg_lun_lock);
1398 lun = &tpg->tpg_lun_list[unpacked_lun];
1400 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
1401 pr_err("%s Logical Unit Number: %u is not free on"
1402 " Target Portal Group: %hu, ignoring request.\n",
1403 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1404 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1405 spin_unlock(&tpg->tpg_lun_lock);
1408 spin_unlock(&tpg->tpg_lun_lock);
1413 /* core_dev_get_lun():
1417 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1421 spin_lock(&tpg->tpg_lun_lock);
1422 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1423 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1424 "_TPG-1: %u for Target Portal Group: %hu\n",
1425 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1426 TRANSPORT_MAX_LUNS_PER_TPG-1,
1427 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1428 spin_unlock(&tpg->tpg_lun_lock);
1431 lun = &tpg->tpg_lun_list[unpacked_lun];
1433 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
1434 pr_err("%s Logical Unit Number: %u is not active on"
1435 " Target Portal Group: %hu, ignoring request.\n",
1436 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1437 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1438 spin_unlock(&tpg->tpg_lun_lock);
1441 spin_unlock(&tpg->tpg_lun_lock);
1446 struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1447 struct se_portal_group *tpg,
1448 struct se_node_acl *nacl,
1452 struct se_lun_acl *lacl;
1454 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) {
1455 pr_err("%s InitiatorName exceeds maximum size.\n",
1456 tpg->se_tpg_tfo->get_fabric_name());
1460 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
1462 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
1467 INIT_LIST_HEAD(&lacl->lacl_list);
1468 lacl->mapped_lun = mapped_lun;
1469 lacl->se_lun_nacl = nacl;
1470 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s",
1471 nacl->initiatorname);
1476 int core_dev_add_initiator_node_lun_acl(
1477 struct se_portal_group *tpg,
1478 struct se_lun_acl *lacl,
1483 struct se_node_acl *nacl;
1485 lun = core_dev_get_lun(tpg, unpacked_lun);
1487 pr_err("%s Logical Unit Number: %u is not active on"
1488 " Target Portal Group: %hu, ignoring request.\n",
1489 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1490 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1494 nacl = lacl->se_lun_nacl;
1498 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1499 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1500 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1504 if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun,
1505 lun_access, nacl, tpg, 1) < 0)
1508 spin_lock(&lun->lun_acl_lock);
1509 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
1510 atomic_inc(&lun->lun_acl_count);
1511 smp_mb__after_atomic_inc();
1512 spin_unlock(&lun->lun_acl_lock);
1514 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1515 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
1516 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
1517 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1518 lacl->initiatorname);
1520 * Check to see if there are any existing persistent reservation APTPL
1521 * pre-registrations that need to be enabled for this LUN ACL..
1523 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
1527 /* core_dev_del_initiator_node_lun_acl():
1531 int core_dev_del_initiator_node_lun_acl(
1532 struct se_portal_group *tpg,
1534 struct se_lun_acl *lacl)
1536 struct se_node_acl *nacl;
1538 nacl = lacl->se_lun_nacl;
1542 spin_lock(&lun->lun_acl_lock);
1543 list_del(&lacl->lacl_list);
1544 atomic_dec(&lun->lun_acl_count);
1545 smp_mb__after_atomic_dec();
1546 spin_unlock(&lun->lun_acl_lock);
1548 core_update_device_list_for_node(lun, NULL, lacl->mapped_lun,
1549 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
1551 lacl->se_lun = NULL;
1553 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1554 " InitiatorNode: %s Mapped LUN: %u\n",
1555 tpg->se_tpg_tfo->get_fabric_name(),
1556 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1557 lacl->initiatorname, lacl->mapped_lun);
1562 void core_dev_free_initiator_node_lun_acl(
1563 struct se_portal_group *tpg,
1564 struct se_lun_acl *lacl)
1566 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1567 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1568 tpg->se_tpg_tfo->tpg_get_tag(tpg),
1569 tpg->se_tpg_tfo->get_fabric_name(),
1570 lacl->initiatorname, lacl->mapped_lun);
1575 int core_dev_setup_virtual_lun0(void)
1578 struct se_device *dev;
1579 struct se_subsystem_dev *se_dev = NULL;
1580 struct se_subsystem_api *t;
1584 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
1586 return PTR_ERR(hba);
1591 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
1593 pr_err("Unable to allocate memory for"
1594 " struct se_subsystem_dev\n");
1598 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
1599 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
1600 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
1601 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
1602 spin_lock_init(&se_dev->t10_pr.registration_lock);
1603 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
1604 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
1605 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
1606 spin_lock_init(&se_dev->se_dev_lock);
1607 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
1608 se_dev->t10_wwn.t10_sub_dev = se_dev;
1609 se_dev->t10_alua.t10_sub_dev = se_dev;
1610 se_dev->se_dev_attrib.da_sub_dev = se_dev;
1611 se_dev->se_dev_hba = hba;
1613 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0");
1614 if (!se_dev->se_dev_su_ptr) {
1615 pr_err("Unable to locate subsystem dependent pointer"
1616 " from allocate_virtdevice()\n");
1620 lun0_su_dev = se_dev;
1623 sprintf(buf, "rd_pages=8");
1624 t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf));
1626 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1631 se_dev->se_dev_ptr = dev;
1639 core_delete_hba(lun0_hba);
1646 void core_dev_release_virtual_lun0(void)
1648 struct se_hba *hba = lun0_hba;
1649 struct se_subsystem_dev *su_dev = lun0_su_dev;
1655 se_free_virtual_device(g_lun0_dev, hba);
1658 core_delete_hba(hba);