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>
40 #include <scsi/scsi.h>
41 #include <scsi/scsi_device.h>
43 #include <target/target_core_base.h>
44 #include <target/target_core_device.h>
45 #include <target/target_core_tpg.h>
46 #include <target/target_core_transport.h>
47 #include <target/target_core_fabric_ops.h>
49 #include "target_core_alua.h"
50 #include "target_core_hba.h"
51 #include "target_core_pr.h"
52 #include "target_core_ua.h"
54 static void se_dev_start(struct se_device *dev);
55 static void se_dev_stop(struct se_device *dev);
57 static struct se_hba *lun0_hba;
58 static struct se_subsystem_dev *lun0_su_dev;
59 /* not static, needed by tpg.c */
60 struct se_device *g_lun0_dev;
62 int transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
64 struct se_lun *se_lun = NULL;
65 struct se_session *se_sess = se_cmd->se_sess;
66 struct se_device *dev;
69 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
70 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
71 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
75 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
76 se_cmd->se_deve = &se_sess->se_node_acl->device_list[unpacked_lun];
77 if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
78 struct se_dev_entry *deve = se_cmd->se_deve;
81 deve->total_bytes += se_cmd->data_length;
83 if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
84 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
85 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
86 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
87 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
88 " Access for 0x%08x\n",
89 se_cmd->se_tfo->get_fabric_name(),
91 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
95 if (se_cmd->data_direction == DMA_TO_DEVICE)
96 deve->write_bytes += se_cmd->data_length;
97 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
98 deve->read_bytes += se_cmd->data_length;
102 se_lun = deve->se_lun;
103 se_cmd->se_lun = deve->se_lun;
104 se_cmd->pr_res_key = deve->pr_res_key;
105 se_cmd->orig_fe_lun = unpacked_lun;
106 se_cmd->se_orig_obj_ptr = se_cmd->se_lun->lun_se_dev;
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_orig_obj_ptr = se_cmd->se_lun->lun_se_dev;
140 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
143 * Determine if the struct se_lun is online.
144 * FIXME: Check for LUN_RESET + UNIT Attention
146 if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
147 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
148 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
152 /* Directly associate cmd with se_dev */
153 se_cmd->se_dev = se_lun->lun_se_dev;
155 /* TODO: get rid of this and use atomics for stats */
156 dev = se_lun->lun_se_dev;
157 spin_lock_irqsave(&dev->stats_lock, flags);
159 if (se_cmd->data_direction == DMA_TO_DEVICE)
160 dev->write_bytes += se_cmd->data_length;
161 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
162 dev->read_bytes += se_cmd->data_length;
163 spin_unlock_irqrestore(&dev->stats_lock, flags);
166 * Add the iscsi_cmd_t to the struct se_lun's cmd list. This list is used
167 * for tracking state of struct se_cmds during LUN shutdown events.
169 spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
170 list_add_tail(&se_cmd->se_lun_node, &se_lun->lun_cmd_list);
171 atomic_set(&se_cmd->transport_lun_active, 1);
172 spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);
176 EXPORT_SYMBOL(transport_lookup_cmd_lun);
178 int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
180 struct se_dev_entry *deve;
181 struct se_lun *se_lun = NULL;
182 struct se_session *se_sess = se_cmd->se_sess;
183 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
186 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
187 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
188 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
192 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
193 se_cmd->se_deve = &se_sess->se_node_acl->device_list[unpacked_lun];
194 deve = se_cmd->se_deve;
196 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
197 se_tmr->tmr_lun = deve->se_lun;
198 se_cmd->se_lun = deve->se_lun;
199 se_lun = deve->se_lun;
200 se_cmd->pr_res_key = deve->pr_res_key;
201 se_cmd->orig_fe_lun = unpacked_lun;
202 se_cmd->se_orig_obj_ptr = se_cmd->se_dev;
204 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
207 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
208 " Access for 0x%08x\n",
209 se_cmd->se_tfo->get_fabric_name(),
211 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
215 * Determine if the struct se_lun is online.
216 * FIXME: Check for LUN_RESET + UNIT Attention
218 if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
219 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
223 /* Directly associate cmd with se_dev */
224 se_cmd->se_dev = se_lun->lun_se_dev;
225 se_tmr->tmr_dev = se_lun->lun_se_dev;
227 spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags);
228 list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list);
229 spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags);
233 EXPORT_SYMBOL(transport_lookup_tmr_lun);
236 * This function is called from core_scsi3_emulate_pro_register_and_move()
237 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
238 * when a matching rtpi is found.
240 struct se_dev_entry *core_get_se_deve_from_rtpi(
241 struct se_node_acl *nacl,
244 struct se_dev_entry *deve;
246 struct se_port *port;
247 struct se_portal_group *tpg = nacl->se_tpg;
250 spin_lock_irq(&nacl->device_list_lock);
251 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
252 deve = &nacl->device_list[i];
254 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
259 pr_err("%s device entries device pointer is"
260 " NULL, but Initiator has access.\n",
261 tpg->se_tpg_tfo->get_fabric_name());
266 pr_err("%s device entries device pointer is"
267 " NULL, but Initiator has access.\n",
268 tpg->se_tpg_tfo->get_fabric_name());
271 if (port->sep_rtpi != rtpi)
274 atomic_inc(&deve->pr_ref_count);
275 smp_mb__after_atomic_inc();
276 spin_unlock_irq(&nacl->device_list_lock);
280 spin_unlock_irq(&nacl->device_list_lock);
285 int core_free_device_list_for_node(
286 struct se_node_acl *nacl,
287 struct se_portal_group *tpg)
289 struct se_dev_entry *deve;
293 if (!nacl->device_list)
296 spin_lock_irq(&nacl->device_list_lock);
297 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
298 deve = &nacl->device_list[i];
300 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
304 pr_err("%s device entries device pointer is"
305 " NULL, but Initiator has access.\n",
306 tpg->se_tpg_tfo->get_fabric_name());
311 spin_unlock_irq(&nacl->device_list_lock);
312 core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
313 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
314 spin_lock_irq(&nacl->device_list_lock);
316 spin_unlock_irq(&nacl->device_list_lock);
318 kfree(nacl->device_list);
319 nacl->device_list = NULL;
324 void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd)
326 struct se_dev_entry *deve;
328 spin_lock_irq(&se_nacl->device_list_lock);
329 deve = &se_nacl->device_list[se_cmd->orig_fe_lun];
331 spin_unlock_irq(&se_nacl->device_list_lock);
334 void core_update_device_list_access(
337 struct se_node_acl *nacl)
339 struct se_dev_entry *deve;
341 spin_lock_irq(&nacl->device_list_lock);
342 deve = &nacl->device_list[mapped_lun];
343 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
344 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
345 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
347 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
348 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
350 spin_unlock_irq(&nacl->device_list_lock);
353 /* core_update_device_list_for_node():
357 int core_update_device_list_for_node(
359 struct se_lun_acl *lun_acl,
362 struct se_node_acl *nacl,
363 struct se_portal_group *tpg,
366 struct se_port *port = lun->lun_sep;
367 struct se_dev_entry *deve = &nacl->device_list[mapped_lun];
370 * If the MappedLUN entry is being disabled, the entry in
371 * port->sep_alua_list must be removed now before clearing the
372 * struct se_dev_entry pointers below as logic in
373 * core_alua_do_transition_tg_pt() depends on these being present.
377 * deve->se_lun_acl will be NULL for demo-mode created LUNs
378 * that have not been explicitly concerted to MappedLUNs ->
379 * struct se_lun_acl, but we remove deve->alua_port_list from
380 * port->sep_alua_list. This also means that active UAs and
381 * NodeACL context specific PR metadata for demo-mode
382 * MappedLUN *deve will be released below..
384 spin_lock_bh(&port->sep_alua_lock);
385 list_del(&deve->alua_port_list);
386 spin_unlock_bh(&port->sep_alua_lock);
389 spin_lock_irq(&nacl->device_list_lock);
392 * Check if the call is handling demo mode -> explict LUN ACL
393 * transition. This transition must be for the same struct se_lun
394 * + mapped_lun that was setup in demo mode..
396 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
397 if (deve->se_lun_acl != NULL) {
398 pr_err("struct se_dev_entry->se_lun_acl"
399 " already set for demo mode -> explict"
400 " LUN ACL transition\n");
401 spin_unlock_irq(&nacl->device_list_lock);
404 if (deve->se_lun != lun) {
405 pr_err("struct se_dev_entry->se_lun does"
406 " match passed struct se_lun for demo mode"
407 " -> explict LUN ACL transition\n");
408 spin_unlock_irq(&nacl->device_list_lock);
411 deve->se_lun_acl = lun_acl;
415 deve->se_lun_acl = lun_acl;
416 deve->mapped_lun = mapped_lun;
417 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
420 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
421 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
422 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
424 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
425 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
429 spin_unlock_irq(&nacl->device_list_lock);
432 deve->creation_time = get_jiffies_64();
433 deve->attach_count++;
434 spin_unlock_irq(&nacl->device_list_lock);
436 spin_lock_bh(&port->sep_alua_lock);
437 list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
438 spin_unlock_bh(&port->sep_alua_lock);
443 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
444 * PR operation to complete.
446 spin_unlock_irq(&nacl->device_list_lock);
447 while (atomic_read(&deve->pr_ref_count) != 0)
449 spin_lock_irq(&nacl->device_list_lock);
451 * Disable struct se_dev_entry LUN ACL mapping
453 core_scsi3_ua_release_all(deve);
455 deve->se_lun_acl = NULL;
457 deve->creation_time = 0;
458 deve->attach_count--;
459 spin_unlock_irq(&nacl->device_list_lock);
461 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
465 /* core_clear_lun_from_tpg():
469 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
471 struct se_node_acl *nacl;
472 struct se_dev_entry *deve;
475 spin_lock_irq(&tpg->acl_node_lock);
476 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
477 spin_unlock_irq(&tpg->acl_node_lock);
479 spin_lock_irq(&nacl->device_list_lock);
480 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
481 deve = &nacl->device_list[i];
482 if (lun != deve->se_lun)
484 spin_unlock_irq(&nacl->device_list_lock);
486 core_update_device_list_for_node(lun, NULL,
487 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
490 spin_lock_irq(&nacl->device_list_lock);
492 spin_unlock_irq(&nacl->device_list_lock);
494 spin_lock_irq(&tpg->acl_node_lock);
496 spin_unlock_irq(&tpg->acl_node_lock);
499 static struct se_port *core_alloc_port(struct se_device *dev)
501 struct se_port *port, *port_tmp;
503 port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
505 pr_err("Unable to allocate struct se_port\n");
506 return ERR_PTR(-ENOMEM);
508 INIT_LIST_HEAD(&port->sep_alua_list);
509 INIT_LIST_HEAD(&port->sep_list);
510 atomic_set(&port->sep_tg_pt_secondary_offline, 0);
511 spin_lock_init(&port->sep_alua_lock);
512 mutex_init(&port->sep_tg_pt_md_mutex);
514 spin_lock(&dev->se_port_lock);
515 if (dev->dev_port_count == 0x0000ffff) {
516 pr_warn("Reached dev->dev_port_count =="
518 spin_unlock(&dev->se_port_lock);
519 return ERR_PTR(-ENOSPC);
523 * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device
524 * Here is the table from spc4r17 section 7.7.3.8.
526 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
530 * 1h Relative port 1, historically known as port A
531 * 2h Relative port 2, historically known as port B
532 * 3h to FFFFh Relative port 3 through 65 535
534 port->sep_rtpi = dev->dev_rpti_counter++;
538 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
540 * Make sure RELATIVE TARGET PORT IDENTIFER is unique
543 if (port->sep_rtpi == port_tmp->sep_rtpi)
546 spin_unlock(&dev->se_port_lock);
551 static void core_export_port(
552 struct se_device *dev,
553 struct se_portal_group *tpg,
554 struct se_port *port,
557 struct se_subsystem_dev *su_dev = dev->se_sub_dev;
558 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
560 spin_lock(&dev->se_port_lock);
561 spin_lock(&lun->lun_sep_lock);
565 spin_unlock(&lun->lun_sep_lock);
567 list_add_tail(&port->sep_list, &dev->dev_sep_list);
568 spin_unlock(&dev->se_port_lock);
570 if (su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) {
571 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
572 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
573 pr_err("Unable to allocate t10_alua_tg_pt"
577 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
578 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
579 su_dev->t10_alua.default_tg_pt_gp);
580 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
581 pr_debug("%s/%s: Adding to default ALUA Target Port"
582 " Group: alua/default_tg_pt_gp\n",
583 dev->transport->name, tpg->se_tpg_tfo->get_fabric_name());
586 dev->dev_port_count++;
587 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */
591 * Called with struct se_device->se_port_lock spinlock held.
593 static void core_release_port(struct se_device *dev, struct se_port *port)
594 __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock)
597 * Wait for any port reference for PR ALL_TG_PT=1 operation
598 * to complete in __core_scsi3_alloc_registration()
600 spin_unlock(&dev->se_port_lock);
601 if (atomic_read(&port->sep_tg_pt_ref_cnt))
603 spin_lock(&dev->se_port_lock);
605 core_alua_free_tg_pt_gp_mem(port);
607 list_del(&port->sep_list);
608 dev->dev_port_count--;
613 struct se_device *dev,
614 struct se_portal_group *tpg,
617 struct se_port *port;
619 port = core_alloc_port(dev);
621 return PTR_ERR(port);
623 lun->lun_se_dev = dev;
626 atomic_inc(&dev->dev_export_obj.obj_access_count);
627 core_export_port(dev, tpg, port, lun);
631 void core_dev_unexport(
632 struct se_device *dev,
633 struct se_portal_group *tpg,
636 struct se_port *port = lun->lun_sep;
638 spin_lock(&lun->lun_sep_lock);
639 if (lun->lun_se_dev == NULL) {
640 spin_unlock(&lun->lun_sep_lock);
643 spin_unlock(&lun->lun_sep_lock);
645 spin_lock(&dev->se_port_lock);
646 atomic_dec(&dev->dev_export_obj.obj_access_count);
647 core_release_port(dev, port);
648 spin_unlock(&dev->se_port_lock);
651 lun->lun_se_dev = NULL;
654 int target_report_luns(struct se_task *se_task)
656 struct se_cmd *se_cmd = se_task->task_se_cmd;
657 struct se_dev_entry *deve;
658 struct se_lun *se_lun;
659 struct se_session *se_sess = se_cmd->se_sess;
661 u32 cdb_offset = 0, lun_count = 0, offset = 8, i;
663 buf = transport_kmap_first_data_page(se_cmd);
666 * If no struct se_session pointer is present, this struct se_cmd is
667 * coming via a target_core_mod PASSTHROUGH op, and not through
668 * a $FABRIC_MOD. In that case, report LUN=0 only.
671 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]);
676 spin_lock_irq(&se_sess->se_node_acl->device_list_lock);
677 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
678 deve = &se_sess->se_node_acl->device_list[i];
679 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
681 se_lun = deve->se_lun;
683 * We determine the correct LUN LIST LENGTH even once we
684 * have reached the initial allocation length.
688 if ((cdb_offset + 8) >= se_cmd->data_length)
691 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]);
695 spin_unlock_irq(&se_sess->se_node_acl->device_list_lock);
698 * See SPC3 r07, page 159.
701 transport_kunmap_first_data_page(se_cmd);
703 buf[0] = ((lun_count >> 24) & 0xff);
704 buf[1] = ((lun_count >> 16) & 0xff);
705 buf[2] = ((lun_count >> 8) & 0xff);
706 buf[3] = (lun_count & 0xff);
708 se_task->task_scsi_status = GOOD;
709 transport_complete_task(se_task, 1);
710 return PYX_TRANSPORT_SENT_TO_TRANSPORT;
713 /* se_release_device_for_hba():
717 void se_release_device_for_hba(struct se_device *dev)
719 struct se_hba *hba = dev->se_hba;
721 if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
722 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) ||
723 (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) ||
724 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) ||
725 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED))
729 kthread_stop(dev->process_thread);
730 if (dev->transport->free_device)
731 dev->transport->free_device(dev->dev_ptr);
734 spin_lock(&hba->device_lock);
735 list_del(&dev->dev_list);
737 spin_unlock(&hba->device_lock);
739 core_scsi3_free_all_registrations(dev);
740 se_release_vpd_for_dev(dev);
745 void se_release_vpd_for_dev(struct se_device *dev)
747 struct t10_vpd *vpd, *vpd_tmp;
749 spin_lock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
750 list_for_each_entry_safe(vpd, vpd_tmp,
751 &dev->se_sub_dev->t10_wwn.t10_vpd_list, vpd_list) {
752 list_del(&vpd->vpd_list);
755 spin_unlock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
758 /* se_free_virtual_device():
760 * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers.
762 int se_free_virtual_device(struct se_device *dev, struct se_hba *hba)
764 if (!list_empty(&dev->dev_sep_list))
767 core_alua_free_lu_gp_mem(dev);
768 se_release_device_for_hba(dev);
773 static void se_dev_start(struct se_device *dev)
775 struct se_hba *hba = dev->se_hba;
777 spin_lock(&hba->device_lock);
778 atomic_inc(&dev->dev_obj.obj_access_count);
779 if (atomic_read(&dev->dev_obj.obj_access_count) == 1) {
780 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) {
781 dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED;
782 dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED;
783 } else if (dev->dev_status &
784 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) {
786 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
787 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
790 spin_unlock(&hba->device_lock);
793 static void se_dev_stop(struct se_device *dev)
795 struct se_hba *hba = dev->se_hba;
797 spin_lock(&hba->device_lock);
798 atomic_dec(&dev->dev_obj.obj_access_count);
799 if (atomic_read(&dev->dev_obj.obj_access_count) == 0) {
800 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) {
801 dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED;
802 dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED;
803 } else if (dev->dev_status &
804 TRANSPORT_DEVICE_OFFLINE_ACTIVATED) {
805 dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
806 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
809 spin_unlock(&hba->device_lock);
812 int se_dev_check_online(struct se_device *dev)
817 spin_lock_irqsave(&dev->dev_status_lock, flags);
818 ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
819 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1;
820 spin_unlock_irqrestore(&dev->dev_status_lock, flags);
825 int se_dev_check_shutdown(struct se_device *dev)
829 spin_lock_irq(&dev->dev_status_lock);
830 ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN);
831 spin_unlock_irq(&dev->dev_status_lock);
836 u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
838 u32 tmp, aligned_max_sectors;
840 * Limit max_sectors to a PAGE_SIZE aligned value for modern
841 * transport_allocate_data_tasks() operation.
843 tmp = rounddown((max_sectors * block_size), PAGE_SIZE);
844 aligned_max_sectors = (tmp / block_size);
845 if (max_sectors != aligned_max_sectors) {
846 printk(KERN_INFO "Rounding down aligned max_sectors from %u"
847 " to %u\n", max_sectors, aligned_max_sectors);
848 return aligned_max_sectors;
854 void se_dev_set_default_attribs(
855 struct se_device *dev,
856 struct se_dev_limits *dev_limits)
858 struct queue_limits *limits = &dev_limits->limits;
860 dev->se_sub_dev->se_dev_attrib.emulate_dpo = DA_EMULATE_DPO;
861 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
862 dev->se_sub_dev->se_dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
863 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
864 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
865 dev->se_sub_dev->se_dev_attrib.emulate_tas = DA_EMULATE_TAS;
866 dev->se_sub_dev->se_dev_attrib.emulate_tpu = DA_EMULATE_TPU;
867 dev->se_sub_dev->se_dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
868 dev->se_sub_dev->se_dev_attrib.emulate_reservations = DA_EMULATE_RESERVATIONS;
869 dev->se_sub_dev->se_dev_attrib.emulate_alua = DA_EMULATE_ALUA;
870 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
871 dev->se_sub_dev->se_dev_attrib.is_nonrot = DA_IS_NONROT;
872 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
874 * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK
875 * iblock_create_virtdevice() from struct queue_limits values
876 * if blk_queue_discard()==1
878 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
879 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
880 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
881 dev->se_sub_dev->se_dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
882 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment =
883 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
885 * block_size is based on subsystem plugin dependent requirements.
887 dev->se_sub_dev->se_dev_attrib.hw_block_size = limits->logical_block_size;
888 dev->se_sub_dev->se_dev_attrib.block_size = limits->logical_block_size;
890 * max_sectors is based on subsystem plugin dependent requirements.
892 dev->se_sub_dev->se_dev_attrib.hw_max_sectors = limits->max_hw_sectors;
894 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
896 limits->max_sectors = se_dev_align_max_sectors(limits->max_sectors,
897 limits->logical_block_size);
898 dev->se_sub_dev->se_dev_attrib.max_sectors = limits->max_sectors;
900 * Set optimal_sectors from max_sectors, which can be lowered via
903 dev->se_sub_dev->se_dev_attrib.optimal_sectors = limits->max_sectors;
905 * queue_depth is based on subsystem plugin dependent requirements.
907 dev->se_sub_dev->se_dev_attrib.hw_queue_depth = dev_limits->hw_queue_depth;
908 dev->se_sub_dev->se_dev_attrib.queue_depth = dev_limits->queue_depth;
911 int se_dev_set_max_unmap_lba_count(
912 struct se_device *dev,
913 u32 max_unmap_lba_count)
915 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = max_unmap_lba_count;
916 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n",
917 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count);
921 int se_dev_set_max_unmap_block_desc_count(
922 struct se_device *dev,
923 u32 max_unmap_block_desc_count)
925 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
926 max_unmap_block_desc_count;
927 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
928 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count);
932 int se_dev_set_unmap_granularity(
933 struct se_device *dev,
934 u32 unmap_granularity)
936 dev->se_sub_dev->se_dev_attrib.unmap_granularity = unmap_granularity;
937 pr_debug("dev[%p]: Set unmap_granularity: %u\n",
938 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity);
942 int se_dev_set_unmap_granularity_alignment(
943 struct se_device *dev,
944 u32 unmap_granularity_alignment)
946 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
947 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
948 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment);
952 int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
954 if (flag != 0 && flag != 1) {
955 pr_err("Illegal value %d\n", flag);
959 pr_err("dpo_emulated not supported\n");
963 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
965 if (flag != 0 && flag != 1) {
966 pr_err("Illegal value %d\n", flag);
970 if (dev->transport->fua_write_emulated == 0) {
971 pr_err("fua_write_emulated not supported\n");
974 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = flag;
975 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
976 dev, dev->se_sub_dev->se_dev_attrib.emulate_fua_write);
980 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
982 if (flag != 0 && flag != 1) {
983 pr_err("Illegal value %d\n", flag);
987 pr_err("ua read emulated not supported\n");
991 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
993 if (flag != 0 && flag != 1) {
994 pr_err("Illegal value %d\n", flag);
997 if (dev->transport->write_cache_emulated == 0) {
998 pr_err("write_cache_emulated not supported\n");
1001 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = flag;
1002 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
1003 dev, dev->se_sub_dev->se_dev_attrib.emulate_write_cache);
1007 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
1009 if ((flag != 0) && (flag != 1) && (flag != 2)) {
1010 pr_err("Illegal value %d\n", flag);
1014 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1015 pr_err("dev[%p]: Unable to change SE Device"
1016 " UA_INTRLCK_CTRL while dev_export_obj: %d count"
1018 atomic_read(&dev->dev_export_obj.obj_access_count));
1021 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = flag;
1022 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
1023 dev, dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl);
1028 int se_dev_set_emulate_tas(struct se_device *dev, int flag)
1030 if ((flag != 0) && (flag != 1)) {
1031 pr_err("Illegal value %d\n", flag);
1035 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1036 pr_err("dev[%p]: Unable to change SE Device TAS while"
1037 " dev_export_obj: %d count exists\n", dev,
1038 atomic_read(&dev->dev_export_obj.obj_access_count));
1041 dev->se_sub_dev->se_dev_attrib.emulate_tas = flag;
1042 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
1043 dev, (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? "Enabled" : "Disabled");
1048 int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
1050 if ((flag != 0) && (flag != 1)) {
1051 pr_err("Illegal value %d\n", flag);
1055 * We expect this value to be non-zero when generic Block Layer
1056 * Discard supported is detected iblock_create_virtdevice().
1058 if (!dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
1059 pr_err("Generic Block Discard not supported\n");
1063 dev->se_sub_dev->se_dev_attrib.emulate_tpu = flag;
1064 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
1069 int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
1071 if ((flag != 0) && (flag != 1)) {
1072 pr_err("Illegal value %d\n", flag);
1076 * We expect this value to be non-zero when generic Block Layer
1077 * Discard supported is detected iblock_create_virtdevice().
1079 if (!dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
1080 pr_err("Generic Block Discard not supported\n");
1084 dev->se_sub_dev->se_dev_attrib.emulate_tpws = flag;
1085 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
1090 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
1092 if ((flag != 0) && (flag != 1)) {
1093 pr_err("Illegal value %d\n", flag);
1096 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = flag;
1097 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
1098 (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
1102 int se_dev_set_is_nonrot(struct se_device *dev, int flag)
1104 if ((flag != 0) && (flag != 1)) {
1105 printk(KERN_ERR "Illegal value %d\n", flag);
1108 dev->se_sub_dev->se_dev_attrib.is_nonrot = flag;
1109 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
1114 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
1117 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted"
1118 " reordering not implemented\n", dev);
1121 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = flag;
1122 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
1127 * Note, this can only be called on unexported SE Device Object.
1129 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
1131 u32 orig_queue_depth = dev->queue_depth;
1133 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1134 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1135 " dev_export_obj: %d count exists\n", dev,
1136 atomic_read(&dev->dev_export_obj.obj_access_count));
1140 pr_err("dev[%p]: Illegal ZERO value for queue"
1145 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1146 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
1147 pr_err("dev[%p]: Passed queue_depth: %u"
1148 " exceeds TCM/SE_Device TCQ: %u\n",
1150 dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
1154 if (queue_depth > dev->se_sub_dev->se_dev_attrib.queue_depth) {
1155 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
1156 pr_err("dev[%p]: Passed queue_depth:"
1157 " %u exceeds TCM/SE_Device MAX"
1158 " TCQ: %u\n", dev, queue_depth,
1159 dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
1165 dev->se_sub_dev->se_dev_attrib.queue_depth = dev->queue_depth = queue_depth;
1166 if (queue_depth > orig_queue_depth)
1167 atomic_add(queue_depth - orig_queue_depth, &dev->depth_left);
1168 else if (queue_depth < orig_queue_depth)
1169 atomic_sub(orig_queue_depth - queue_depth, &dev->depth_left);
1171 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
1176 int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors)
1178 int force = 0; /* Force setting for VDEVS */
1180 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1181 pr_err("dev[%p]: Unable to change SE Device"
1182 " max_sectors while dev_export_obj: %d count exists\n",
1183 dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1187 pr_err("dev[%p]: Illegal ZERO value for"
1188 " max_sectors\n", dev);
1191 if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
1192 pr_err("dev[%p]: Passed max_sectors: %u less than"
1193 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors,
1194 DA_STATUS_MAX_SECTORS_MIN);
1197 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1198 if (max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) {
1199 pr_err("dev[%p]: Passed max_sectors: %u"
1200 " greater than TCM/SE_Device max_sectors:"
1201 " %u\n", dev, max_sectors,
1202 dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
1206 if (!force && (max_sectors >
1207 dev->se_sub_dev->se_dev_attrib.hw_max_sectors)) {
1208 pr_err("dev[%p]: Passed max_sectors: %u"
1209 " greater than TCM/SE_Device max_sectors"
1210 ": %u, use force=1 to override.\n", dev,
1211 max_sectors, dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
1214 if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
1215 pr_err("dev[%p]: Passed max_sectors: %u"
1216 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1217 " %u\n", dev, max_sectors,
1218 DA_STATUS_MAX_SECTORS_MAX);
1223 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
1225 max_sectors = se_dev_align_max_sectors(max_sectors,
1226 dev->se_sub_dev->se_dev_attrib.block_size);
1228 dev->se_sub_dev->se_dev_attrib.max_sectors = max_sectors;
1229 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
1234 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
1236 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1237 pr_err("dev[%p]: Unable to change SE Device"
1238 " optimal_sectors while dev_export_obj: %d count exists\n",
1239 dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1242 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1243 pr_err("dev[%p]: Passed optimal_sectors cannot be"
1244 " changed for TCM/pSCSI\n", dev);
1247 if (optimal_sectors > dev->se_sub_dev->se_dev_attrib.max_sectors) {
1248 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1249 " greater than max_sectors: %u\n", dev,
1250 optimal_sectors, dev->se_sub_dev->se_dev_attrib.max_sectors);
1254 dev->se_sub_dev->se_dev_attrib.optimal_sectors = optimal_sectors;
1255 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1256 dev, optimal_sectors);
1260 int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1262 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1263 pr_err("dev[%p]: Unable to change SE Device block_size"
1264 " while dev_export_obj: %d count exists\n", dev,
1265 atomic_read(&dev->dev_export_obj.obj_access_count));
1269 if ((block_size != 512) &&
1270 (block_size != 1024) &&
1271 (block_size != 2048) &&
1272 (block_size != 4096)) {
1273 pr_err("dev[%p]: Illegal value for block_device: %u"
1274 " for SE device, must be 512, 1024, 2048 or 4096\n",
1279 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1280 pr_err("dev[%p]: Not allowed to change block_size for"
1281 " Physical Device, use for Linux/SCSI to change"
1282 " block_size for underlying hardware\n", dev);
1286 dev->se_sub_dev->se_dev_attrib.block_size = block_size;
1287 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1292 struct se_lun *core_dev_add_lun(
1293 struct se_portal_group *tpg,
1295 struct se_device *dev,
1298 struct se_lun *lun_p;
1301 if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) {
1302 pr_err("Unable to export struct se_device while dev_access_obj: %d\n",
1303 atomic_read(&dev->dev_access_obj.obj_access_count));
1307 lun_p = core_tpg_pre_addlun(tpg, lun);
1308 if ((IS_ERR(lun_p)) || !lun_p)
1311 if (dev->dev_flags & DF_READ_ONLY)
1312 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1314 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
1316 if (core_tpg_post_addlun(tpg, lun_p, lun_access, dev) < 0)
1319 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1320 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1321 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun,
1322 tpg->se_tpg_tfo->get_fabric_name(), hba->hba_id);
1324 * Update LUN maps for dynamically added initiators when
1325 * generate_node_acl is enabled.
1327 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
1328 struct se_node_acl *acl;
1329 spin_lock_irq(&tpg->acl_node_lock);
1330 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
1331 if (acl->dynamic_node_acl &&
1332 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
1333 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
1334 spin_unlock_irq(&tpg->acl_node_lock);
1335 core_tpg_add_node_to_devs(acl, tpg);
1336 spin_lock_irq(&tpg->acl_node_lock);
1339 spin_unlock_irq(&tpg->acl_node_lock);
1345 /* core_dev_del_lun():
1349 int core_dev_del_lun(
1350 struct se_portal_group *tpg,
1356 lun = core_tpg_pre_dellun(tpg, unpacked_lun, &ret);
1360 core_tpg_post_dellun(tpg, lun);
1362 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
1363 " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
1364 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun,
1365 tpg->se_tpg_tfo->get_fabric_name());
1370 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1374 spin_lock(&tpg->tpg_lun_lock);
1375 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1376 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1377 "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1378 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1379 TRANSPORT_MAX_LUNS_PER_TPG-1,
1380 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1381 spin_unlock(&tpg->tpg_lun_lock);
1384 lun = &tpg->tpg_lun_list[unpacked_lun];
1386 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
1387 pr_err("%s Logical Unit Number: %u is not free on"
1388 " Target Portal Group: %hu, ignoring request.\n",
1389 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1390 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1391 spin_unlock(&tpg->tpg_lun_lock);
1394 spin_unlock(&tpg->tpg_lun_lock);
1399 /* core_dev_get_lun():
1403 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1407 spin_lock(&tpg->tpg_lun_lock);
1408 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1409 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1410 "_TPG-1: %u for Target Portal Group: %hu\n",
1411 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1412 TRANSPORT_MAX_LUNS_PER_TPG-1,
1413 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1414 spin_unlock(&tpg->tpg_lun_lock);
1417 lun = &tpg->tpg_lun_list[unpacked_lun];
1419 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
1420 pr_err("%s Logical Unit Number: %u is not active on"
1421 " Target Portal Group: %hu, ignoring request.\n",
1422 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1423 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1424 spin_unlock(&tpg->tpg_lun_lock);
1427 spin_unlock(&tpg->tpg_lun_lock);
1432 struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1433 struct se_portal_group *tpg,
1435 char *initiatorname,
1438 struct se_lun_acl *lacl;
1439 struct se_node_acl *nacl;
1441 if (strlen(initiatorname) >= TRANSPORT_IQN_LEN) {
1442 pr_err("%s InitiatorName exceeds maximum size.\n",
1443 tpg->se_tpg_tfo->get_fabric_name());
1447 nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
1452 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
1454 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
1459 INIT_LIST_HEAD(&lacl->lacl_list);
1460 lacl->mapped_lun = mapped_lun;
1461 lacl->se_lun_nacl = nacl;
1462 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
1467 int core_dev_add_initiator_node_lun_acl(
1468 struct se_portal_group *tpg,
1469 struct se_lun_acl *lacl,
1474 struct se_node_acl *nacl;
1476 lun = core_dev_get_lun(tpg, unpacked_lun);
1478 pr_err("%s Logical Unit Number: %u is not active on"
1479 " Target Portal Group: %hu, ignoring request.\n",
1480 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1481 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1485 nacl = lacl->se_lun_nacl;
1489 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1490 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1491 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1495 if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun,
1496 lun_access, nacl, tpg, 1) < 0)
1499 spin_lock(&lun->lun_acl_lock);
1500 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
1501 atomic_inc(&lun->lun_acl_count);
1502 smp_mb__after_atomic_inc();
1503 spin_unlock(&lun->lun_acl_lock);
1505 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1506 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
1507 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
1508 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1509 lacl->initiatorname);
1511 * Check to see if there are any existing persistent reservation APTPL
1512 * pre-registrations that need to be enabled for this LUN ACL..
1514 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
1518 /* core_dev_del_initiator_node_lun_acl():
1522 int core_dev_del_initiator_node_lun_acl(
1523 struct se_portal_group *tpg,
1525 struct se_lun_acl *lacl)
1527 struct se_node_acl *nacl;
1529 nacl = lacl->se_lun_nacl;
1533 spin_lock(&lun->lun_acl_lock);
1534 list_del(&lacl->lacl_list);
1535 atomic_dec(&lun->lun_acl_count);
1536 smp_mb__after_atomic_dec();
1537 spin_unlock(&lun->lun_acl_lock);
1539 core_update_device_list_for_node(lun, NULL, lacl->mapped_lun,
1540 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
1542 lacl->se_lun = NULL;
1544 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1545 " InitiatorNode: %s Mapped LUN: %u\n",
1546 tpg->se_tpg_tfo->get_fabric_name(),
1547 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1548 lacl->initiatorname, lacl->mapped_lun);
1553 void core_dev_free_initiator_node_lun_acl(
1554 struct se_portal_group *tpg,
1555 struct se_lun_acl *lacl)
1557 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1558 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1559 tpg->se_tpg_tfo->tpg_get_tag(tpg),
1560 tpg->se_tpg_tfo->get_fabric_name(),
1561 lacl->initiatorname, lacl->mapped_lun);
1566 int core_dev_setup_virtual_lun0(void)
1569 struct se_device *dev;
1570 struct se_subsystem_dev *se_dev = NULL;
1571 struct se_subsystem_api *t;
1575 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
1577 return PTR_ERR(hba);
1582 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
1584 pr_err("Unable to allocate memory for"
1585 " struct se_subsystem_dev\n");
1589 INIT_LIST_HEAD(&se_dev->se_dev_node);
1590 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
1591 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
1592 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
1593 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
1594 spin_lock_init(&se_dev->t10_pr.registration_lock);
1595 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
1596 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
1597 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
1598 spin_lock_init(&se_dev->se_dev_lock);
1599 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
1600 se_dev->t10_wwn.t10_sub_dev = se_dev;
1601 se_dev->t10_alua.t10_sub_dev = se_dev;
1602 se_dev->se_dev_attrib.da_sub_dev = se_dev;
1603 se_dev->se_dev_hba = hba;
1605 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0");
1606 if (!se_dev->se_dev_su_ptr) {
1607 pr_err("Unable to locate subsystem dependent pointer"
1608 " from allocate_virtdevice()\n");
1612 lun0_su_dev = se_dev;
1615 sprintf(buf, "rd_pages=8");
1616 t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf));
1618 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1623 se_dev->se_dev_ptr = dev;
1631 core_delete_hba(lun0_hba);
1638 void core_dev_release_virtual_lun0(void)
1640 struct se_hba *hba = lun0_hba;
1641 struct se_subsystem_dev *su_dev = lun0_su_dev;
1647 se_free_virtual_device(g_lun0_dev, hba);
1650 core_delete_hba(hba);