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_backend.h>
46 #include <target/target_core_fabric.h>
48 #include "target_core_internal.h"
49 #include "target_core_alua.h"
50 #include "target_core_pr.h"
51 #include "target_core_ua.h"
53 static void se_dev_start(struct se_device *dev);
54 static void se_dev_stop(struct se_device *dev);
56 static struct se_hba *lun0_hba;
57 static struct se_subsystem_dev *lun0_su_dev;
58 /* not static, needed by tpg.c */
59 struct se_device *g_lun0_dev;
61 int transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
63 struct se_lun *se_lun = NULL;
64 struct se_session *se_sess = se_cmd->se_sess;
65 struct se_device *dev;
68 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
69 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
70 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
74 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
75 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
76 if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
77 struct se_dev_entry *deve = se_cmd->se_deve;
80 deve->total_bytes += se_cmd->data_length;
82 if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
83 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
84 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
85 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
86 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
87 " Access for 0x%08x\n",
88 se_cmd->se_tfo->get_fabric_name(),
90 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
94 if (se_cmd->data_direction == DMA_TO_DEVICE)
95 deve->write_bytes += se_cmd->data_length;
96 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
97 deve->read_bytes += se_cmd->data_length;
101 se_lun = deve->se_lun;
102 se_cmd->se_lun = deve->se_lun;
103 se_cmd->pr_res_key = deve->pr_res_key;
104 se_cmd->orig_fe_lun = unpacked_lun;
105 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
107 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
111 * Use the se_portal_group->tpg_virt_lun0 to allow for
112 * REPORT_LUNS, et al to be returned when no active
113 * MappedLUN=0 exists for this Initiator Port.
115 if (unpacked_lun != 0) {
116 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
117 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
118 pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
119 " Access for 0x%08x\n",
120 se_cmd->se_tfo->get_fabric_name(),
125 * Force WRITE PROTECT for virtual LUN 0
127 if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
128 (se_cmd->data_direction != DMA_NONE)) {
129 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
130 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
134 se_lun = &se_sess->se_tpg->tpg_virt_lun0;
135 se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
136 se_cmd->orig_fe_lun = 0;
137 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
140 * Determine if the struct se_lun is online.
141 * FIXME: Check for LUN_RESET + UNIT Attention
143 if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
144 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
145 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
149 /* Directly associate cmd with se_dev */
150 se_cmd->se_dev = se_lun->lun_se_dev;
152 /* TODO: get rid of this and use atomics for stats */
153 dev = se_lun->lun_se_dev;
154 spin_lock_irqsave(&dev->stats_lock, flags);
156 if (se_cmd->data_direction == DMA_TO_DEVICE)
157 dev->write_bytes += se_cmd->data_length;
158 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
159 dev->read_bytes += se_cmd->data_length;
160 spin_unlock_irqrestore(&dev->stats_lock, flags);
162 spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
163 list_add_tail(&se_cmd->se_lun_node, &se_lun->lun_cmd_list);
164 spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);
168 EXPORT_SYMBOL(transport_lookup_cmd_lun);
170 int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
172 struct se_dev_entry *deve;
173 struct se_lun *se_lun = NULL;
174 struct se_session *se_sess = se_cmd->se_sess;
175 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
178 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
179 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
180 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
184 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
185 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
186 deve = se_cmd->se_deve;
188 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
189 se_tmr->tmr_lun = deve->se_lun;
190 se_cmd->se_lun = deve->se_lun;
191 se_lun = deve->se_lun;
192 se_cmd->pr_res_key = deve->pr_res_key;
193 se_cmd->orig_fe_lun = unpacked_lun;
195 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
198 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
199 " Access for 0x%08x\n",
200 se_cmd->se_tfo->get_fabric_name(),
202 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
206 * Determine if the struct se_lun is online.
207 * FIXME: Check for LUN_RESET + UNIT Attention
209 if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
210 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
214 /* Directly associate cmd with se_dev */
215 se_cmd->se_dev = se_lun->lun_se_dev;
216 se_tmr->tmr_dev = se_lun->lun_se_dev;
218 spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags);
219 list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list);
220 spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags);
224 EXPORT_SYMBOL(transport_lookup_tmr_lun);
227 * This function is called from core_scsi3_emulate_pro_register_and_move()
228 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
229 * when a matching rtpi is found.
231 struct se_dev_entry *core_get_se_deve_from_rtpi(
232 struct se_node_acl *nacl,
235 struct se_dev_entry *deve;
237 struct se_port *port;
238 struct se_portal_group *tpg = nacl->se_tpg;
241 spin_lock_irq(&nacl->device_list_lock);
242 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
243 deve = nacl->device_list[i];
245 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
250 pr_err("%s device entries device pointer is"
251 " NULL, but Initiator has access.\n",
252 tpg->se_tpg_tfo->get_fabric_name());
257 pr_err("%s device entries device pointer is"
258 " NULL, but Initiator has access.\n",
259 tpg->se_tpg_tfo->get_fabric_name());
262 if (port->sep_rtpi != rtpi)
265 atomic_inc(&deve->pr_ref_count);
266 smp_mb__after_atomic_inc();
267 spin_unlock_irq(&nacl->device_list_lock);
271 spin_unlock_irq(&nacl->device_list_lock);
276 int core_free_device_list_for_node(
277 struct se_node_acl *nacl,
278 struct se_portal_group *tpg)
280 struct se_dev_entry *deve;
284 if (!nacl->device_list)
287 spin_lock_irq(&nacl->device_list_lock);
288 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
289 deve = nacl->device_list[i];
291 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
295 pr_err("%s device entries device pointer is"
296 " NULL, but Initiator has access.\n",
297 tpg->se_tpg_tfo->get_fabric_name());
302 spin_unlock_irq(&nacl->device_list_lock);
303 core_disable_device_list_for_node(lun, NULL, deve->mapped_lun,
304 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
305 spin_lock_irq(&nacl->device_list_lock);
307 spin_unlock_irq(&nacl->device_list_lock);
309 array_free(nacl->device_list, TRANSPORT_MAX_LUNS_PER_TPG);
310 nacl->device_list = NULL;
315 void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd)
317 struct se_dev_entry *deve;
320 spin_lock_irqsave(&se_nacl->device_list_lock, flags);
321 deve = se_nacl->device_list[se_cmd->orig_fe_lun];
323 spin_unlock_irqrestore(&se_nacl->device_list_lock, flags);
326 void core_update_device_list_access(
329 struct se_node_acl *nacl)
331 struct se_dev_entry *deve;
333 spin_lock_irq(&nacl->device_list_lock);
334 deve = nacl->device_list[mapped_lun];
335 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
336 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
337 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
339 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
340 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
342 spin_unlock_irq(&nacl->device_list_lock);
345 /* core_enable_device_list_for_node():
349 int core_enable_device_list_for_node(
351 struct se_lun_acl *lun_acl,
354 struct se_node_acl *nacl,
355 struct se_portal_group *tpg)
357 struct se_port *port = lun->lun_sep;
358 struct se_dev_entry *deve;
360 spin_lock_irq(&nacl->device_list_lock);
362 deve = nacl->device_list[mapped_lun];
365 * Check if the call is handling demo mode -> explict LUN ACL
366 * transition. This transition must be for the same struct se_lun
367 * + mapped_lun that was setup in demo mode..
369 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
370 if (deve->se_lun_acl != NULL) {
371 pr_err("struct se_dev_entry->se_lun_acl"
372 " already set for demo mode -> explict"
373 " LUN ACL transition\n");
374 spin_unlock_irq(&nacl->device_list_lock);
377 if (deve->se_lun != lun) {
378 pr_err("struct se_dev_entry->se_lun does"
379 " match passed struct se_lun for demo mode"
380 " -> explict LUN ACL transition\n");
381 spin_unlock_irq(&nacl->device_list_lock);
384 deve->se_lun_acl = lun_acl;
386 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
387 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
388 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
390 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
391 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
394 spin_unlock_irq(&nacl->device_list_lock);
399 deve->se_lun_acl = lun_acl;
400 deve->mapped_lun = mapped_lun;
401 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
403 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
404 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
405 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
407 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
408 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
411 deve->creation_time = get_jiffies_64();
412 deve->attach_count++;
413 spin_unlock_irq(&nacl->device_list_lock);
415 spin_lock_bh(&port->sep_alua_lock);
416 list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
417 spin_unlock_bh(&port->sep_alua_lock);
422 /* core_disable_device_list_for_node():
426 int core_disable_device_list_for_node(
428 struct se_lun_acl *lun_acl,
431 struct se_node_acl *nacl,
432 struct se_portal_group *tpg)
434 struct se_port *port = lun->lun_sep;
435 struct se_dev_entry *deve = nacl->device_list[mapped_lun];
438 * If the MappedLUN entry is being disabled, the entry in
439 * port->sep_alua_list must be removed now before clearing the
440 * struct se_dev_entry pointers below as logic in
441 * core_alua_do_transition_tg_pt() depends on these being present.
443 * deve->se_lun_acl will be NULL for demo-mode created LUNs
444 * that have not been explicitly converted to MappedLUNs ->
445 * struct se_lun_acl, but we remove deve->alua_port_list from
446 * port->sep_alua_list. This also means that active UAs and
447 * NodeACL context specific PR metadata for demo-mode
448 * MappedLUN *deve will be released below..
450 spin_lock_bh(&port->sep_alua_lock);
451 list_del(&deve->alua_port_list);
452 spin_unlock_bh(&port->sep_alua_lock);
454 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
455 * PR operation to complete.
457 while (atomic_read(&deve->pr_ref_count) != 0)
460 spin_lock_irq(&nacl->device_list_lock);
462 * Disable struct se_dev_entry LUN ACL mapping
464 core_scsi3_ua_release_all(deve);
466 deve->se_lun_acl = NULL;
468 deve->creation_time = 0;
469 deve->attach_count--;
470 spin_unlock_irq(&nacl->device_list_lock);
472 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
476 /* core_clear_lun_from_tpg():
480 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
482 struct se_node_acl *nacl;
483 struct se_dev_entry *deve;
486 spin_lock_irq(&tpg->acl_node_lock);
487 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
488 spin_unlock_irq(&tpg->acl_node_lock);
490 spin_lock_irq(&nacl->device_list_lock);
491 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
492 deve = nacl->device_list[i];
493 if (lun != deve->se_lun)
495 spin_unlock_irq(&nacl->device_list_lock);
497 core_disable_device_list_for_node(lun, NULL,
498 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
501 spin_lock_irq(&nacl->device_list_lock);
503 spin_unlock_irq(&nacl->device_list_lock);
505 spin_lock_irq(&tpg->acl_node_lock);
507 spin_unlock_irq(&tpg->acl_node_lock);
510 static struct se_port *core_alloc_port(struct se_device *dev)
512 struct se_port *port, *port_tmp;
514 port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
516 pr_err("Unable to allocate struct se_port\n");
517 return ERR_PTR(-ENOMEM);
519 INIT_LIST_HEAD(&port->sep_alua_list);
520 INIT_LIST_HEAD(&port->sep_list);
521 atomic_set(&port->sep_tg_pt_secondary_offline, 0);
522 spin_lock_init(&port->sep_alua_lock);
523 mutex_init(&port->sep_tg_pt_md_mutex);
525 spin_lock(&dev->se_port_lock);
526 if (dev->dev_port_count == 0x0000ffff) {
527 pr_warn("Reached dev->dev_port_count =="
529 spin_unlock(&dev->se_port_lock);
530 return ERR_PTR(-ENOSPC);
534 * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device
535 * Here is the table from spc4r17 section 7.7.3.8.
537 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
541 * 1h Relative port 1, historically known as port A
542 * 2h Relative port 2, historically known as port B
543 * 3h to FFFFh Relative port 3 through 65 535
545 port->sep_rtpi = dev->dev_rpti_counter++;
549 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
551 * Make sure RELATIVE TARGET PORT IDENTIFER is unique
554 if (port->sep_rtpi == port_tmp->sep_rtpi)
557 spin_unlock(&dev->se_port_lock);
562 static void core_export_port(
563 struct se_device *dev,
564 struct se_portal_group *tpg,
565 struct se_port *port,
568 struct se_subsystem_dev *su_dev = dev->se_sub_dev;
569 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
571 spin_lock(&dev->se_port_lock);
572 spin_lock(&lun->lun_sep_lock);
576 spin_unlock(&lun->lun_sep_lock);
578 list_add_tail(&port->sep_list, &dev->dev_sep_list);
579 spin_unlock(&dev->se_port_lock);
581 if (su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) {
582 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
583 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
584 pr_err("Unable to allocate t10_alua_tg_pt"
588 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
589 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
590 su_dev->t10_alua.default_tg_pt_gp);
591 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
592 pr_debug("%s/%s: Adding to default ALUA Target Port"
593 " Group: alua/default_tg_pt_gp\n",
594 dev->transport->name, tpg->se_tpg_tfo->get_fabric_name());
597 dev->dev_port_count++;
598 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */
602 * Called with struct se_device->se_port_lock spinlock held.
604 static void core_release_port(struct se_device *dev, struct se_port *port)
605 __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock)
608 * Wait for any port reference for PR ALL_TG_PT=1 operation
609 * to complete in __core_scsi3_alloc_registration()
611 spin_unlock(&dev->se_port_lock);
612 if (atomic_read(&port->sep_tg_pt_ref_cnt))
614 spin_lock(&dev->se_port_lock);
616 core_alua_free_tg_pt_gp_mem(port);
618 list_del(&port->sep_list);
619 dev->dev_port_count--;
624 struct se_device *dev,
625 struct se_portal_group *tpg,
628 struct se_port *port;
630 port = core_alloc_port(dev);
632 return PTR_ERR(port);
634 lun->lun_se_dev = dev;
637 atomic_inc(&dev->dev_export_obj.obj_access_count);
638 core_export_port(dev, tpg, port, lun);
642 void core_dev_unexport(
643 struct se_device *dev,
644 struct se_portal_group *tpg,
647 struct se_port *port = lun->lun_sep;
649 spin_lock(&lun->lun_sep_lock);
650 if (lun->lun_se_dev == NULL) {
651 spin_unlock(&lun->lun_sep_lock);
654 spin_unlock(&lun->lun_sep_lock);
656 spin_lock(&dev->se_port_lock);
657 atomic_dec(&dev->dev_export_obj.obj_access_count);
658 core_release_port(dev, port);
659 spin_unlock(&dev->se_port_lock);
662 lun->lun_se_dev = NULL;
665 int target_report_luns(struct se_cmd *se_cmd)
667 struct se_dev_entry *deve;
668 struct se_session *se_sess = se_cmd->se_sess;
670 u32 lun_count = 0, offset = 8, i;
672 buf = transport_kmap_data_sg(se_cmd);
677 * If no struct se_session pointer is present, this struct se_cmd is
678 * coming via a target_core_mod PASSTHROUGH op, and not through
679 * a $FABRIC_MOD. In that case, report LUN=0 only.
682 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]);
687 spin_lock_irq(&se_sess->se_node_acl->device_list_lock);
688 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
689 deve = se_sess->se_node_acl->device_list[i];
690 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
693 * We determine the correct LUN LIST LENGTH even once we
694 * have reached the initial allocation length.
698 if ((offset + 8) > se_cmd->data_length)
701 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]);
704 spin_unlock_irq(&se_sess->se_node_acl->device_list_lock);
707 * See SPC3 r07, page 159.
711 buf[0] = ((lun_count >> 24) & 0xff);
712 buf[1] = ((lun_count >> 16) & 0xff);
713 buf[2] = ((lun_count >> 8) & 0xff);
714 buf[3] = (lun_count & 0xff);
715 transport_kunmap_data_sg(se_cmd);
717 target_complete_cmd(se_cmd, GOOD);
721 /* se_release_device_for_hba():
725 void se_release_device_for_hba(struct se_device *dev)
727 struct se_hba *hba = dev->se_hba;
729 if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
730 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) ||
731 (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) ||
732 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) ||
733 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED))
737 destroy_workqueue(dev->tmr_wq);
738 if (dev->transport->free_device)
739 dev->transport->free_device(dev->dev_ptr);
742 spin_lock(&hba->device_lock);
743 list_del(&dev->dev_list);
745 spin_unlock(&hba->device_lock);
747 core_scsi3_free_all_registrations(dev);
748 se_release_vpd_for_dev(dev);
753 void se_release_vpd_for_dev(struct se_device *dev)
755 struct t10_vpd *vpd, *vpd_tmp;
757 spin_lock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
758 list_for_each_entry_safe(vpd, vpd_tmp,
759 &dev->se_sub_dev->t10_wwn.t10_vpd_list, vpd_list) {
760 list_del(&vpd->vpd_list);
763 spin_unlock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
766 /* se_free_virtual_device():
768 * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers.
770 int se_free_virtual_device(struct se_device *dev, struct se_hba *hba)
772 if (!list_empty(&dev->dev_sep_list))
775 core_alua_free_lu_gp_mem(dev);
776 se_release_device_for_hba(dev);
781 static void se_dev_start(struct se_device *dev)
783 struct se_hba *hba = dev->se_hba;
785 spin_lock(&hba->device_lock);
786 atomic_inc(&dev->dev_obj.obj_access_count);
787 if (atomic_read(&dev->dev_obj.obj_access_count) == 1) {
788 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) {
789 dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED;
790 dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED;
791 } else if (dev->dev_status &
792 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) {
794 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
795 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
798 spin_unlock(&hba->device_lock);
801 static void se_dev_stop(struct se_device *dev)
803 struct se_hba *hba = dev->se_hba;
805 spin_lock(&hba->device_lock);
806 atomic_dec(&dev->dev_obj.obj_access_count);
807 if (atomic_read(&dev->dev_obj.obj_access_count) == 0) {
808 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) {
809 dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED;
810 dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED;
811 } else if (dev->dev_status &
812 TRANSPORT_DEVICE_OFFLINE_ACTIVATED) {
813 dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
814 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
817 spin_unlock(&hba->device_lock);
820 int se_dev_check_online(struct se_device *dev)
825 spin_lock_irqsave(&dev->dev_status_lock, flags);
826 ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
827 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1;
828 spin_unlock_irqrestore(&dev->dev_status_lock, flags);
833 int se_dev_check_shutdown(struct se_device *dev)
837 spin_lock_irq(&dev->dev_status_lock);
838 ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN);
839 spin_unlock_irq(&dev->dev_status_lock);
844 static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
846 u32 tmp, aligned_max_sectors;
848 * Limit max_sectors to a PAGE_SIZE aligned value for modern
849 * transport_allocate_data_tasks() operation.
851 tmp = rounddown((max_sectors * block_size), PAGE_SIZE);
852 aligned_max_sectors = (tmp / block_size);
853 if (max_sectors != aligned_max_sectors) {
854 printk(KERN_INFO "Rounding down aligned max_sectors from %u"
855 " to %u\n", max_sectors, aligned_max_sectors);
856 return aligned_max_sectors;
862 void se_dev_set_default_attribs(
863 struct se_device *dev,
864 struct se_dev_limits *dev_limits)
866 struct queue_limits *limits = &dev_limits->limits;
868 dev->se_sub_dev->se_dev_attrib.emulate_dpo = DA_EMULATE_DPO;
869 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
870 dev->se_sub_dev->se_dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
871 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
872 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
873 dev->se_sub_dev->se_dev_attrib.emulate_tas = DA_EMULATE_TAS;
874 dev->se_sub_dev->se_dev_attrib.emulate_tpu = DA_EMULATE_TPU;
875 dev->se_sub_dev->se_dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
876 dev->se_sub_dev->se_dev_attrib.emulate_reservations = DA_EMULATE_RESERVATIONS;
877 dev->se_sub_dev->se_dev_attrib.emulate_alua = DA_EMULATE_ALUA;
878 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
879 dev->se_sub_dev->se_dev_attrib.is_nonrot = DA_IS_NONROT;
880 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
882 * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK
883 * iblock_create_virtdevice() from struct queue_limits values
884 * if blk_queue_discard()==1
886 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
887 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
888 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
889 dev->se_sub_dev->se_dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
890 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment =
891 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
893 * block_size is based on subsystem plugin dependent requirements.
895 dev->se_sub_dev->se_dev_attrib.hw_block_size = limits->logical_block_size;
896 dev->se_sub_dev->se_dev_attrib.block_size = limits->logical_block_size;
898 * Align max_hw_sectors down to PAGE_SIZE I/O transfers
900 limits->max_hw_sectors = se_dev_align_max_sectors(limits->max_hw_sectors,
901 limits->logical_block_size);
902 dev->se_sub_dev->se_dev_attrib.hw_max_sectors = limits->max_hw_sectors;
905 * Set fabric_max_sectors, which is reported in block limits
908 dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS;
910 * Set optimal_sectors from fabric_max_sectors, which can be
911 * lowered via configfs.
913 dev->se_sub_dev->se_dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS;
915 * queue_depth is based on subsystem plugin dependent requirements.
917 dev->se_sub_dev->se_dev_attrib.hw_queue_depth = dev_limits->hw_queue_depth;
918 dev->se_sub_dev->se_dev_attrib.queue_depth = dev_limits->queue_depth;
921 int se_dev_set_max_unmap_lba_count(
922 struct se_device *dev,
923 u32 max_unmap_lba_count)
925 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = max_unmap_lba_count;
926 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n",
927 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count);
931 int se_dev_set_max_unmap_block_desc_count(
932 struct se_device *dev,
933 u32 max_unmap_block_desc_count)
935 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
936 max_unmap_block_desc_count;
937 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
938 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count);
942 int se_dev_set_unmap_granularity(
943 struct se_device *dev,
944 u32 unmap_granularity)
946 dev->se_sub_dev->se_dev_attrib.unmap_granularity = unmap_granularity;
947 pr_debug("dev[%p]: Set unmap_granularity: %u\n",
948 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity);
952 int se_dev_set_unmap_granularity_alignment(
953 struct se_device *dev,
954 u32 unmap_granularity_alignment)
956 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
957 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
958 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment);
962 int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
964 if (flag != 0 && flag != 1) {
965 pr_err("Illegal value %d\n", flag);
970 pr_err("dpo_emulated not supported\n");
977 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
979 if (flag != 0 && flag != 1) {
980 pr_err("Illegal value %d\n", flag);
984 if (flag && dev->transport->fua_write_emulated == 0) {
985 pr_err("fua_write_emulated not supported\n");
988 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = flag;
989 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
990 dev, dev->se_sub_dev->se_dev_attrib.emulate_fua_write);
994 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
996 if (flag != 0 && flag != 1) {
997 pr_err("Illegal value %d\n", flag);
1002 pr_err("ua read emulated not supported\n");
1009 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
1011 if (flag != 0 && flag != 1) {
1012 pr_err("Illegal value %d\n", flag);
1015 if (flag && dev->transport->write_cache_emulated == 0) {
1016 pr_err("write_cache_emulated not supported\n");
1019 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = flag;
1020 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
1021 dev, dev->se_sub_dev->se_dev_attrib.emulate_write_cache);
1025 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
1027 if ((flag != 0) && (flag != 1) && (flag != 2)) {
1028 pr_err("Illegal value %d\n", flag);
1032 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1033 pr_err("dev[%p]: Unable to change SE Device"
1034 " UA_INTRLCK_CTRL while dev_export_obj: %d count"
1036 atomic_read(&dev->dev_export_obj.obj_access_count));
1039 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = flag;
1040 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
1041 dev, dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl);
1046 int se_dev_set_emulate_tas(struct se_device *dev, int flag)
1048 if ((flag != 0) && (flag != 1)) {
1049 pr_err("Illegal value %d\n", flag);
1053 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1054 pr_err("dev[%p]: Unable to change SE Device TAS while"
1055 " dev_export_obj: %d count exists\n", dev,
1056 atomic_read(&dev->dev_export_obj.obj_access_count));
1059 dev->se_sub_dev->se_dev_attrib.emulate_tas = flag;
1060 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
1061 dev, (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? "Enabled" : "Disabled");
1066 int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
1068 if ((flag != 0) && (flag != 1)) {
1069 pr_err("Illegal value %d\n", flag);
1073 * We expect this value to be non-zero when generic Block Layer
1074 * Discard supported is detected iblock_create_virtdevice().
1076 if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
1077 pr_err("Generic Block Discard not supported\n");
1081 dev->se_sub_dev->se_dev_attrib.emulate_tpu = flag;
1082 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
1087 int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
1089 if ((flag != 0) && (flag != 1)) {
1090 pr_err("Illegal value %d\n", flag);
1094 * We expect this value to be non-zero when generic Block Layer
1095 * Discard supported is detected iblock_create_virtdevice().
1097 if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
1098 pr_err("Generic Block Discard not supported\n");
1102 dev->se_sub_dev->se_dev_attrib.emulate_tpws = flag;
1103 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
1108 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
1110 if ((flag != 0) && (flag != 1)) {
1111 pr_err("Illegal value %d\n", flag);
1114 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = flag;
1115 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
1116 (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
1120 int se_dev_set_is_nonrot(struct se_device *dev, int flag)
1122 if ((flag != 0) && (flag != 1)) {
1123 printk(KERN_ERR "Illegal value %d\n", flag);
1126 dev->se_sub_dev->se_dev_attrib.is_nonrot = flag;
1127 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
1132 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
1135 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted"
1136 " reordering not implemented\n", dev);
1139 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = flag;
1140 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
1145 * Note, this can only be called on unexported SE Device Object.
1147 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
1149 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1150 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1151 " dev_export_obj: %d count exists\n", dev,
1152 atomic_read(&dev->dev_export_obj.obj_access_count));
1156 pr_err("dev[%p]: Illegal ZERO value for queue"
1161 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1162 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
1163 pr_err("dev[%p]: Passed queue_depth: %u"
1164 " exceeds TCM/SE_Device TCQ: %u\n",
1166 dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
1170 if (queue_depth > dev->se_sub_dev->se_dev_attrib.queue_depth) {
1171 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
1172 pr_err("dev[%p]: Passed queue_depth:"
1173 " %u exceeds TCM/SE_Device MAX"
1174 " TCQ: %u\n", dev, queue_depth,
1175 dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
1181 dev->se_sub_dev->se_dev_attrib.queue_depth = dev->queue_depth = queue_depth;
1182 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
1187 int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
1189 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1190 pr_err("dev[%p]: Unable to change SE Device"
1191 " fabric_max_sectors while dev_export_obj: %d count exists\n",
1192 dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1195 if (!fabric_max_sectors) {
1196 pr_err("dev[%p]: Illegal ZERO value for"
1197 " fabric_max_sectors\n", dev);
1200 if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
1201 pr_err("dev[%p]: Passed fabric_max_sectors: %u less than"
1202 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors,
1203 DA_STATUS_MAX_SECTORS_MIN);
1206 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1207 if (fabric_max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) {
1208 pr_err("dev[%p]: Passed fabric_max_sectors: %u"
1209 " greater than TCM/SE_Device max_sectors:"
1210 " %u\n", dev, fabric_max_sectors,
1211 dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
1215 if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
1216 pr_err("dev[%p]: Passed fabric_max_sectors: %u"
1217 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1218 " %u\n", dev, fabric_max_sectors,
1219 DA_STATUS_MAX_SECTORS_MAX);
1224 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
1226 fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors,
1227 dev->se_sub_dev->se_dev_attrib.block_size);
1229 dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = fabric_max_sectors;
1230 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
1231 dev, fabric_max_sectors);
1235 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
1237 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1238 pr_err("dev[%p]: Unable to change SE Device"
1239 " optimal_sectors while dev_export_obj: %d count exists\n",
1240 dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1243 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1244 pr_err("dev[%p]: Passed optimal_sectors cannot be"
1245 " changed for TCM/pSCSI\n", dev);
1248 if (optimal_sectors > dev->se_sub_dev->se_dev_attrib.fabric_max_sectors) {
1249 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1250 " greater than fabric_max_sectors: %u\n", dev,
1251 optimal_sectors, dev->se_sub_dev->se_dev_attrib.fabric_max_sectors);
1255 dev->se_sub_dev->se_dev_attrib.optimal_sectors = optimal_sectors;
1256 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1257 dev, optimal_sectors);
1261 int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1263 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1264 pr_err("dev[%p]: Unable to change SE Device block_size"
1265 " while dev_export_obj: %d count exists\n", dev,
1266 atomic_read(&dev->dev_export_obj.obj_access_count));
1270 if ((block_size != 512) &&
1271 (block_size != 1024) &&
1272 (block_size != 2048) &&
1273 (block_size != 4096)) {
1274 pr_err("dev[%p]: Illegal value for block_device: %u"
1275 " for SE device, must be 512, 1024, 2048 or 4096\n",
1280 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1281 pr_err("dev[%p]: Not allowed to change block_size for"
1282 " Physical Device, use for Linux/SCSI to change"
1283 " block_size for underlying hardware\n", dev);
1287 dev->se_sub_dev->se_dev_attrib.block_size = block_size;
1288 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1293 struct se_lun *core_dev_add_lun(
1294 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));
1304 return ERR_PTR(-EACCES);
1307 lun_p = core_tpg_pre_addlun(tpg, lun);
1311 rc = core_tpg_post_addlun(tpg, lun_p,
1312 TRANSPORT_LUNFLAGS_READ_WRITE, dev);
1316 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1317 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1318 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun,
1319 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id);
1321 * Update LUN maps for dynamically added initiators when
1322 * generate_node_acl is enabled.
1324 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
1325 struct se_node_acl *acl;
1326 spin_lock_irq(&tpg->acl_node_lock);
1327 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
1328 if (acl->dynamic_node_acl &&
1329 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
1330 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
1331 spin_unlock_irq(&tpg->acl_node_lock);
1332 core_tpg_add_node_to_devs(acl, tpg);
1333 spin_lock_irq(&tpg->acl_node_lock);
1336 spin_unlock_irq(&tpg->acl_node_lock);
1342 /* core_dev_del_lun():
1346 int core_dev_del_lun(
1347 struct se_portal_group *tpg,
1352 lun = core_tpg_pre_dellun(tpg, unpacked_lun);
1354 return PTR_ERR(lun);
1356 core_tpg_post_dellun(tpg, lun);
1358 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
1359 " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
1360 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun,
1361 tpg->se_tpg_tfo->get_fabric_name());
1366 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1370 spin_lock(&tpg->tpg_lun_lock);
1371 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1372 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1373 "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1374 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1375 TRANSPORT_MAX_LUNS_PER_TPG-1,
1376 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1377 spin_unlock(&tpg->tpg_lun_lock);
1380 lun = tpg->tpg_lun_list[unpacked_lun];
1382 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
1383 pr_err("%s Logical Unit Number: %u is not free on"
1384 " Target Portal Group: %hu, ignoring request.\n",
1385 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1386 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1387 spin_unlock(&tpg->tpg_lun_lock);
1390 spin_unlock(&tpg->tpg_lun_lock);
1395 /* core_dev_get_lun():
1399 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1403 spin_lock(&tpg->tpg_lun_lock);
1404 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1405 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1406 "_TPG-1: %u for Target Portal Group: %hu\n",
1407 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1408 TRANSPORT_MAX_LUNS_PER_TPG-1,
1409 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1410 spin_unlock(&tpg->tpg_lun_lock);
1413 lun = tpg->tpg_lun_list[unpacked_lun];
1415 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
1416 pr_err("%s Logical Unit Number: %u is not active on"
1417 " Target Portal Group: %hu, ignoring request.\n",
1418 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1419 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1420 spin_unlock(&tpg->tpg_lun_lock);
1423 spin_unlock(&tpg->tpg_lun_lock);
1428 struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1429 struct se_portal_group *tpg,
1431 char *initiatorname,
1434 struct se_lun_acl *lacl;
1435 struct se_node_acl *nacl;
1437 if (strlen(initiatorname) >= TRANSPORT_IQN_LEN) {
1438 pr_err("%s InitiatorName exceeds maximum size.\n",
1439 tpg->se_tpg_tfo->get_fabric_name());
1443 nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
1448 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
1450 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
1455 INIT_LIST_HEAD(&lacl->lacl_list);
1456 lacl->mapped_lun = mapped_lun;
1457 lacl->se_lun_nacl = nacl;
1458 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
1463 int core_dev_add_initiator_node_lun_acl(
1464 struct se_portal_group *tpg,
1465 struct se_lun_acl *lacl,
1470 struct se_node_acl *nacl;
1472 lun = core_dev_get_lun(tpg, unpacked_lun);
1474 pr_err("%s Logical Unit Number: %u is not active on"
1475 " Target Portal Group: %hu, ignoring request.\n",
1476 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1477 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1481 nacl = lacl->se_lun_nacl;
1485 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1486 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1487 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1491 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun,
1492 lun_access, nacl, tpg) < 0)
1495 spin_lock(&lun->lun_acl_lock);
1496 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
1497 atomic_inc(&lun->lun_acl_count);
1498 smp_mb__after_atomic_inc();
1499 spin_unlock(&lun->lun_acl_lock);
1501 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1502 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
1503 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
1504 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1505 lacl->initiatorname);
1507 * Check to see if there are any existing persistent reservation APTPL
1508 * pre-registrations that need to be enabled for this LUN ACL..
1510 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
1514 /* core_dev_del_initiator_node_lun_acl():
1518 int core_dev_del_initiator_node_lun_acl(
1519 struct se_portal_group *tpg,
1521 struct se_lun_acl *lacl)
1523 struct se_node_acl *nacl;
1525 nacl = lacl->se_lun_nacl;
1529 spin_lock(&lun->lun_acl_lock);
1530 list_del(&lacl->lacl_list);
1531 atomic_dec(&lun->lun_acl_count);
1532 smp_mb__after_atomic_dec();
1533 spin_unlock(&lun->lun_acl_lock);
1535 core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun,
1536 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
1538 lacl->se_lun = NULL;
1540 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1541 " InitiatorNode: %s Mapped LUN: %u\n",
1542 tpg->se_tpg_tfo->get_fabric_name(),
1543 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1544 lacl->initiatorname, lacl->mapped_lun);
1549 void core_dev_free_initiator_node_lun_acl(
1550 struct se_portal_group *tpg,
1551 struct se_lun_acl *lacl)
1553 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1554 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1555 tpg->se_tpg_tfo->tpg_get_tag(tpg),
1556 tpg->se_tpg_tfo->get_fabric_name(),
1557 lacl->initiatorname, lacl->mapped_lun);
1562 int core_dev_setup_virtual_lun0(void)
1565 struct se_device *dev;
1566 struct se_subsystem_dev *se_dev = NULL;
1567 struct se_subsystem_api *t;
1571 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
1573 return PTR_ERR(hba);
1578 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
1580 pr_err("Unable to allocate memory for"
1581 " struct se_subsystem_dev\n");
1585 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
1586 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
1587 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
1588 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
1589 spin_lock_init(&se_dev->t10_pr.registration_lock);
1590 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
1591 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
1592 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
1593 spin_lock_init(&se_dev->se_dev_lock);
1594 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
1595 se_dev->t10_wwn.t10_sub_dev = se_dev;
1596 se_dev->t10_alua.t10_sub_dev = se_dev;
1597 se_dev->se_dev_attrib.da_sub_dev = se_dev;
1598 se_dev->se_dev_hba = hba;
1600 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0");
1601 if (!se_dev->se_dev_su_ptr) {
1602 pr_err("Unable to locate subsystem dependent pointer"
1603 " from allocate_virtdevice()\n");
1607 lun0_su_dev = se_dev;
1610 sprintf(buf, "rd_pages=8");
1611 t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf));
1613 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1618 se_dev->se_dev_ptr = dev;
1626 core_delete_hba(lun0_hba);
1633 void core_dev_release_virtual_lun0(void)
1635 struct se_hba *hba = lun0_hba;
1636 struct se_subsystem_dev *su_dev = lun0_su_dev;
1642 se_free_virtual_device(g_lun0_dev, hba);
1645 core_delete_hba(hba);