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 * (c) Copyright 2003-2013 Datera, Inc.
9 * Nicholas A. Bellinger <nab@kernel.org>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25 ******************************************************************************/
27 #include <linux/net.h>
28 #include <linux/string.h>
29 #include <linux/delay.h>
30 #include <linux/timer.h>
31 #include <linux/slab.h>
32 #include <linux/spinlock.h>
33 #include <linux/kthread.h>
35 #include <linux/export.h>
38 #include <scsi/scsi.h>
39 #include <scsi/scsi_device.h>
41 #include <target/target_core_base.h>
42 #include <target/target_core_backend.h>
43 #include <target/target_core_fabric.h>
45 #include "target_core_internal.h"
46 #include "target_core_alua.h"
47 #include "target_core_pr.h"
48 #include "target_core_ua.h"
50 DEFINE_MUTEX(g_device_mutex);
51 LIST_HEAD(g_device_list);
53 static struct se_hba *lun0_hba;
54 /* not static, needed by tpg.c */
55 struct se_device *g_lun0_dev;
58 transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
60 struct se_lun *se_lun = NULL;
61 struct se_session *se_sess = se_cmd->se_sess;
62 struct se_device *dev;
65 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG)
66 return TCM_NON_EXISTENT_LUN;
68 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
69 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
70 if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
71 struct se_dev_entry *deve = se_cmd->se_deve;
75 if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
76 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
77 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
78 " Access for 0x%08x\n",
79 se_cmd->se_tfo->get_fabric_name(),
81 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
82 return TCM_WRITE_PROTECTED;
85 if (se_cmd->data_direction == DMA_TO_DEVICE)
86 deve->write_bytes += se_cmd->data_length;
87 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
88 deve->read_bytes += se_cmd->data_length;
90 se_lun = deve->se_lun;
91 se_cmd->se_lun = deve->se_lun;
92 se_cmd->pr_res_key = deve->pr_res_key;
93 se_cmd->orig_fe_lun = unpacked_lun;
94 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
96 percpu_ref_get(&se_lun->lun_ref);
97 se_cmd->lun_ref_active = true;
99 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
103 * Use the se_portal_group->tpg_virt_lun0 to allow for
104 * REPORT_LUNS, et al to be returned when no active
105 * MappedLUN=0 exists for this Initiator Port.
107 if (unpacked_lun != 0) {
108 pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
109 " Access for 0x%08x\n",
110 se_cmd->se_tfo->get_fabric_name(),
112 return TCM_NON_EXISTENT_LUN;
115 * Force WRITE PROTECT for virtual LUN 0
117 if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
118 (se_cmd->data_direction != DMA_NONE))
119 return TCM_WRITE_PROTECTED;
121 se_lun = &se_sess->se_tpg->tpg_virt_lun0;
122 se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
123 se_cmd->orig_fe_lun = 0;
124 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
126 percpu_ref_get(&se_lun->lun_ref);
127 se_cmd->lun_ref_active = true;
130 /* Directly associate cmd with se_dev */
131 se_cmd->se_dev = se_lun->lun_se_dev;
133 dev = se_lun->lun_se_dev;
134 atomic_long_inc(&dev->num_cmds);
135 if (se_cmd->data_direction == DMA_TO_DEVICE)
136 atomic_long_add(se_cmd->data_length, &dev->write_bytes);
137 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
138 atomic_long_add(se_cmd->data_length, &dev->read_bytes);
142 EXPORT_SYMBOL(transport_lookup_cmd_lun);
144 int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
146 struct se_dev_entry *deve;
147 struct se_lun *se_lun = NULL;
148 struct se_session *se_sess = se_cmd->se_sess;
149 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
152 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG)
155 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
156 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
157 deve = se_cmd->se_deve;
159 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
160 se_tmr->tmr_lun = deve->se_lun;
161 se_cmd->se_lun = deve->se_lun;
162 se_lun = deve->se_lun;
163 se_cmd->pr_res_key = deve->pr_res_key;
164 se_cmd->orig_fe_lun = unpacked_lun;
166 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
169 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
170 " Access for 0x%08x\n",
171 se_cmd->se_tfo->get_fabric_name(),
176 /* Directly associate cmd with se_dev */
177 se_cmd->se_dev = se_lun->lun_se_dev;
178 se_tmr->tmr_dev = se_lun->lun_se_dev;
180 spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags);
181 list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list);
182 spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags);
186 EXPORT_SYMBOL(transport_lookup_tmr_lun);
189 * This function is called from core_scsi3_emulate_pro_register_and_move()
190 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
191 * when a matching rtpi is found.
193 struct se_dev_entry *core_get_se_deve_from_rtpi(
194 struct se_node_acl *nacl,
197 struct se_dev_entry *deve;
199 struct se_port *port;
200 struct se_portal_group *tpg = nacl->se_tpg;
203 spin_lock_irq(&nacl->device_list_lock);
204 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
205 deve = nacl->device_list[i];
207 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
212 pr_err("%s device entries device pointer is"
213 " NULL, but Initiator has access.\n",
214 tpg->se_tpg_tfo->get_fabric_name());
219 pr_err("%s device entries device pointer is"
220 " NULL, but Initiator has access.\n",
221 tpg->se_tpg_tfo->get_fabric_name());
224 if (port->sep_rtpi != rtpi)
227 atomic_inc_mb(&deve->pr_ref_count);
228 spin_unlock_irq(&nacl->device_list_lock);
232 spin_unlock_irq(&nacl->device_list_lock);
237 int core_free_device_list_for_node(
238 struct se_node_acl *nacl,
239 struct se_portal_group *tpg)
241 struct se_dev_entry *deve;
245 if (!nacl->device_list)
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))
256 pr_err("%s device entries device pointer is"
257 " NULL, but Initiator has access.\n",
258 tpg->se_tpg_tfo->get_fabric_name());
263 spin_unlock_irq(&nacl->device_list_lock);
264 core_disable_device_list_for_node(lun, NULL, deve->mapped_lun,
265 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
266 spin_lock_irq(&nacl->device_list_lock);
268 spin_unlock_irq(&nacl->device_list_lock);
270 array_free(nacl->device_list, TRANSPORT_MAX_LUNS_PER_TPG);
271 nacl->device_list = NULL;
276 void core_update_device_list_access(
279 struct se_node_acl *nacl)
281 struct se_dev_entry *deve;
283 spin_lock_irq(&nacl->device_list_lock);
284 deve = nacl->device_list[mapped_lun];
285 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
286 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
287 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
289 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
290 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
292 spin_unlock_irq(&nacl->device_list_lock);
295 /* core_enable_device_list_for_node():
299 int core_enable_device_list_for_node(
301 struct se_lun_acl *lun_acl,
304 struct se_node_acl *nacl,
305 struct se_portal_group *tpg)
307 struct se_port *port = lun->lun_sep;
308 struct se_dev_entry *deve;
310 spin_lock_irq(&nacl->device_list_lock);
312 deve = nacl->device_list[mapped_lun];
315 * Check if the call is handling demo mode -> explicit LUN ACL
316 * transition. This transition must be for the same struct se_lun
317 * + mapped_lun that was setup in demo mode..
319 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
320 if (deve->se_lun_acl != NULL) {
321 pr_err("struct se_dev_entry->se_lun_acl"
322 " already set for demo mode -> explicit"
323 " LUN ACL transition\n");
324 spin_unlock_irq(&nacl->device_list_lock);
327 if (deve->se_lun != lun) {
328 pr_err("struct se_dev_entry->se_lun does"
329 " match passed struct se_lun for demo mode"
330 " -> explicit LUN ACL transition\n");
331 spin_unlock_irq(&nacl->device_list_lock);
334 deve->se_lun_acl = lun_acl;
336 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
337 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
338 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
340 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
341 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
344 spin_unlock_irq(&nacl->device_list_lock);
349 deve->se_lun_acl = lun_acl;
350 deve->mapped_lun = mapped_lun;
351 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
353 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
354 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
355 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
357 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
358 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
361 deve->creation_time = get_jiffies_64();
362 deve->attach_count++;
363 spin_unlock_irq(&nacl->device_list_lock);
365 spin_lock_bh(&port->sep_alua_lock);
366 list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
367 spin_unlock_bh(&port->sep_alua_lock);
372 /* core_disable_device_list_for_node():
376 int core_disable_device_list_for_node(
378 struct se_lun_acl *lun_acl,
381 struct se_node_acl *nacl,
382 struct se_portal_group *tpg)
384 struct se_port *port = lun->lun_sep;
385 struct se_dev_entry *deve = nacl->device_list[mapped_lun];
388 * If the MappedLUN entry is being disabled, the entry in
389 * port->sep_alua_list must be removed now before clearing the
390 * struct se_dev_entry pointers below as logic in
391 * core_alua_do_transition_tg_pt() depends on these being present.
393 * deve->se_lun_acl will be NULL for demo-mode created LUNs
394 * that have not been explicitly converted to MappedLUNs ->
395 * struct se_lun_acl, but we remove deve->alua_port_list from
396 * port->sep_alua_list. This also means that active UAs and
397 * NodeACL context specific PR metadata for demo-mode
398 * MappedLUN *deve will be released below..
400 spin_lock_bh(&port->sep_alua_lock);
401 list_del(&deve->alua_port_list);
402 spin_unlock_bh(&port->sep_alua_lock);
404 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
405 * PR operation to complete.
407 while (atomic_read(&deve->pr_ref_count) != 0)
410 spin_lock_irq(&nacl->device_list_lock);
412 * Disable struct se_dev_entry LUN ACL mapping
414 core_scsi3_ua_release_all(deve);
416 deve->se_lun_acl = NULL;
418 deve->creation_time = 0;
419 deve->attach_count--;
420 spin_unlock_irq(&nacl->device_list_lock);
422 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
426 /* core_clear_lun_from_tpg():
430 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
432 struct se_node_acl *nacl;
433 struct se_dev_entry *deve;
436 spin_lock_irq(&tpg->acl_node_lock);
437 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
438 spin_unlock_irq(&tpg->acl_node_lock);
440 spin_lock_irq(&nacl->device_list_lock);
441 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
442 deve = nacl->device_list[i];
443 if (lun != deve->se_lun)
445 spin_unlock_irq(&nacl->device_list_lock);
447 core_disable_device_list_for_node(lun, NULL,
448 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
451 spin_lock_irq(&nacl->device_list_lock);
453 spin_unlock_irq(&nacl->device_list_lock);
455 spin_lock_irq(&tpg->acl_node_lock);
457 spin_unlock_irq(&tpg->acl_node_lock);
460 static struct se_port *core_alloc_port(struct se_device *dev)
462 struct se_port *port, *port_tmp;
464 port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
466 pr_err("Unable to allocate struct se_port\n");
467 return ERR_PTR(-ENOMEM);
469 INIT_LIST_HEAD(&port->sep_alua_list);
470 INIT_LIST_HEAD(&port->sep_list);
471 atomic_set(&port->sep_tg_pt_secondary_offline, 0);
472 spin_lock_init(&port->sep_alua_lock);
473 mutex_init(&port->sep_tg_pt_md_mutex);
475 spin_lock(&dev->se_port_lock);
476 if (dev->dev_port_count == 0x0000ffff) {
477 pr_warn("Reached dev->dev_port_count =="
479 spin_unlock(&dev->se_port_lock);
480 return ERR_PTR(-ENOSPC);
484 * Allocate the next RELATIVE TARGET PORT IDENTIFIER for this struct se_device
485 * Here is the table from spc4r17 section 7.7.3.8.
487 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
491 * 1h Relative port 1, historically known as port A
492 * 2h Relative port 2, historically known as port B
493 * 3h to FFFFh Relative port 3 through 65 535
495 port->sep_rtpi = dev->dev_rpti_counter++;
499 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
501 * Make sure RELATIVE TARGET PORT IDENTIFIER is unique
504 if (port->sep_rtpi == port_tmp->sep_rtpi)
507 spin_unlock(&dev->se_port_lock);
512 static void core_export_port(
513 struct se_device *dev,
514 struct se_portal_group *tpg,
515 struct se_port *port,
518 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
520 spin_lock(&dev->se_port_lock);
521 spin_lock(&lun->lun_sep_lock);
525 spin_unlock(&lun->lun_sep_lock);
527 list_add_tail(&port->sep_list, &dev->dev_sep_list);
528 spin_unlock(&dev->se_port_lock);
530 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV &&
531 !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) {
532 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
533 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
534 pr_err("Unable to allocate t10_alua_tg_pt"
538 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
539 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
540 dev->t10_alua.default_tg_pt_gp);
541 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
542 pr_debug("%s/%s: Adding to default ALUA Target Port"
543 " Group: alua/default_tg_pt_gp\n",
544 dev->transport->name, tpg->se_tpg_tfo->get_fabric_name());
547 dev->dev_port_count++;
548 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFIER */
552 * Called with struct se_device->se_port_lock spinlock held.
554 static void core_release_port(struct se_device *dev, struct se_port *port)
555 __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock)
558 * Wait for any port reference for PR ALL_TG_PT=1 operation
559 * to complete in __core_scsi3_alloc_registration()
561 spin_unlock(&dev->se_port_lock);
562 if (atomic_read(&port->sep_tg_pt_ref_cnt))
564 spin_lock(&dev->se_port_lock);
566 core_alua_free_tg_pt_gp_mem(port);
568 list_del(&port->sep_list);
569 dev->dev_port_count--;
574 struct se_device *dev,
575 struct se_portal_group *tpg,
578 struct se_hba *hba = dev->se_hba;
579 struct se_port *port;
581 port = core_alloc_port(dev);
583 return PTR_ERR(port);
585 lun->lun_se_dev = dev;
587 spin_lock(&hba->device_lock);
589 spin_unlock(&hba->device_lock);
591 core_export_port(dev, tpg, port, lun);
595 void core_dev_unexport(
596 struct se_device *dev,
597 struct se_portal_group *tpg,
600 struct se_hba *hba = dev->se_hba;
601 struct se_port *port = lun->lun_sep;
603 spin_lock(&lun->lun_sep_lock);
604 if (lun->lun_se_dev == NULL) {
605 spin_unlock(&lun->lun_sep_lock);
608 spin_unlock(&lun->lun_sep_lock);
610 spin_lock(&dev->se_port_lock);
611 core_release_port(dev, port);
612 spin_unlock(&dev->se_port_lock);
614 spin_lock(&hba->device_lock);
616 spin_unlock(&hba->device_lock);
619 lun->lun_se_dev = NULL;
622 static void se_release_vpd_for_dev(struct se_device *dev)
624 struct t10_vpd *vpd, *vpd_tmp;
626 spin_lock(&dev->t10_wwn.t10_vpd_lock);
627 list_for_each_entry_safe(vpd, vpd_tmp,
628 &dev->t10_wwn.t10_vpd_list, vpd_list) {
629 list_del(&vpd->vpd_list);
632 spin_unlock(&dev->t10_wwn.t10_vpd_lock);
635 static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
637 u32 aligned_max_sectors;
640 * Limit max_sectors to a PAGE_SIZE aligned value for modern
641 * transport_allocate_data_tasks() operation.
643 alignment = max(1ul, PAGE_SIZE / block_size);
644 aligned_max_sectors = rounddown(max_sectors, alignment);
646 if (max_sectors != aligned_max_sectors)
647 pr_info("Rounding down aligned max_sectors from %u to %u\n",
648 max_sectors, aligned_max_sectors);
650 return aligned_max_sectors;
653 int se_dev_set_max_unmap_lba_count(
654 struct se_device *dev,
655 u32 max_unmap_lba_count)
657 dev->dev_attrib.max_unmap_lba_count = max_unmap_lba_count;
658 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n",
659 dev, dev->dev_attrib.max_unmap_lba_count);
662 EXPORT_SYMBOL(se_dev_set_max_unmap_lba_count);
664 int se_dev_set_max_unmap_block_desc_count(
665 struct se_device *dev,
666 u32 max_unmap_block_desc_count)
668 dev->dev_attrib.max_unmap_block_desc_count =
669 max_unmap_block_desc_count;
670 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
671 dev, dev->dev_attrib.max_unmap_block_desc_count);
674 EXPORT_SYMBOL(se_dev_set_max_unmap_block_desc_count);
676 int se_dev_set_unmap_granularity(
677 struct se_device *dev,
678 u32 unmap_granularity)
680 dev->dev_attrib.unmap_granularity = unmap_granularity;
681 pr_debug("dev[%p]: Set unmap_granularity: %u\n",
682 dev, dev->dev_attrib.unmap_granularity);
685 EXPORT_SYMBOL(se_dev_set_unmap_granularity);
687 int se_dev_set_unmap_granularity_alignment(
688 struct se_device *dev,
689 u32 unmap_granularity_alignment)
691 dev->dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
692 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
693 dev, dev->dev_attrib.unmap_granularity_alignment);
696 EXPORT_SYMBOL(se_dev_set_unmap_granularity_alignment);
698 int se_dev_set_max_write_same_len(
699 struct se_device *dev,
700 u32 max_write_same_len)
702 dev->dev_attrib.max_write_same_len = max_write_same_len;
703 pr_debug("dev[%p]: Set max_write_same_len: %u\n",
704 dev, dev->dev_attrib.max_write_same_len);
707 EXPORT_SYMBOL(se_dev_set_max_write_same_len);
709 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
711 const char *configname;
713 configname = config_item_name(&dev->dev_group.cg_item);
714 if (strlen(configname) >= 16) {
715 pr_warn("dev[%p]: Backstore name '%s' is too long for "
716 "INQUIRY_MODEL, truncating to 16 bytes\n", dev,
719 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname);
722 int se_dev_set_emulate_model_alias(struct se_device *dev, int flag)
724 if (dev->export_count) {
725 pr_err("dev[%p]: Unable to change model alias"
726 " while export_count is %d\n",
727 dev, dev->export_count);
731 if (flag != 0 && flag != 1) {
732 pr_err("Illegal value %d\n", flag);
737 dev_set_t10_wwn_model_alias(dev);
739 strncpy(&dev->t10_wwn.model[0],
740 dev->transport->inquiry_prod, 16);
742 dev->dev_attrib.emulate_model_alias = flag;
746 EXPORT_SYMBOL(se_dev_set_emulate_model_alias);
748 int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
750 if (flag != 0 && flag != 1) {
751 pr_err("Illegal value %d\n", flag);
756 pr_err("dpo_emulated not supported\n");
762 EXPORT_SYMBOL(se_dev_set_emulate_dpo);
764 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
766 if (flag != 0 && flag != 1) {
767 pr_err("Illegal value %d\n", flag);
771 dev->transport->get_write_cache) {
772 pr_err("emulate_fua_write not supported for this device\n");
775 if (dev->export_count) {
776 pr_err("emulate_fua_write cannot be changed with active"
777 " exports: %d\n", dev->export_count);
780 dev->dev_attrib.emulate_fua_write = flag;
781 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
782 dev, dev->dev_attrib.emulate_fua_write);
785 EXPORT_SYMBOL(se_dev_set_emulate_fua_write);
787 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
789 if (flag != 0 && flag != 1) {
790 pr_err("Illegal value %d\n", flag);
795 pr_err("ua read emulated not supported\n");
801 EXPORT_SYMBOL(se_dev_set_emulate_fua_read);
803 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
805 if (flag != 0 && flag != 1) {
806 pr_err("Illegal value %d\n", flag);
810 dev->transport->get_write_cache) {
811 pr_err("emulate_write_cache not supported for this device\n");
814 if (dev->export_count) {
815 pr_err("emulate_write_cache cannot be changed with active"
816 " exports: %d\n", dev->export_count);
819 dev->dev_attrib.emulate_write_cache = flag;
820 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
821 dev, dev->dev_attrib.emulate_write_cache);
824 EXPORT_SYMBOL(se_dev_set_emulate_write_cache);
826 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
828 if ((flag != 0) && (flag != 1) && (flag != 2)) {
829 pr_err("Illegal value %d\n", flag);
833 if (dev->export_count) {
834 pr_err("dev[%p]: Unable to change SE Device"
835 " UA_INTRLCK_CTRL while export_count is %d\n",
836 dev, dev->export_count);
839 dev->dev_attrib.emulate_ua_intlck_ctrl = flag;
840 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
841 dev, dev->dev_attrib.emulate_ua_intlck_ctrl);
845 EXPORT_SYMBOL(se_dev_set_emulate_ua_intlck_ctrl);
847 int se_dev_set_emulate_tas(struct se_device *dev, int flag)
849 if ((flag != 0) && (flag != 1)) {
850 pr_err("Illegal value %d\n", flag);
854 if (dev->export_count) {
855 pr_err("dev[%p]: Unable to change SE Device TAS while"
856 " export_count is %d\n",
857 dev, dev->export_count);
860 dev->dev_attrib.emulate_tas = flag;
861 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
862 dev, (dev->dev_attrib.emulate_tas) ? "Enabled" : "Disabled");
866 EXPORT_SYMBOL(se_dev_set_emulate_tas);
868 int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
870 if ((flag != 0) && (flag != 1)) {
871 pr_err("Illegal value %d\n", flag);
875 * We expect this value to be non-zero when generic Block Layer
876 * Discard supported is detected iblock_create_virtdevice().
878 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) {
879 pr_err("Generic Block Discard not supported\n");
883 dev->dev_attrib.emulate_tpu = flag;
884 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
888 EXPORT_SYMBOL(se_dev_set_emulate_tpu);
890 int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
892 if ((flag != 0) && (flag != 1)) {
893 pr_err("Illegal value %d\n", flag);
897 * We expect this value to be non-zero when generic Block Layer
898 * Discard supported is detected iblock_create_virtdevice().
900 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) {
901 pr_err("Generic Block Discard not supported\n");
905 dev->dev_attrib.emulate_tpws = flag;
906 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
910 EXPORT_SYMBOL(se_dev_set_emulate_tpws);
912 int se_dev_set_emulate_caw(struct se_device *dev, int flag)
914 if (flag != 0 && flag != 1) {
915 pr_err("Illegal value %d\n", flag);
918 dev->dev_attrib.emulate_caw = flag;
919 pr_debug("dev[%p]: SE Device CompareAndWrite (AtomicTestandSet): %d\n",
924 EXPORT_SYMBOL(se_dev_set_emulate_caw);
926 int se_dev_set_emulate_3pc(struct se_device *dev, int flag)
928 if (flag != 0 && flag != 1) {
929 pr_err("Illegal value %d\n", flag);
932 dev->dev_attrib.emulate_3pc = flag;
933 pr_debug("dev[%p]: SE Device 3rd Party Copy (EXTENDED_COPY): %d\n",
938 EXPORT_SYMBOL(se_dev_set_emulate_3pc);
940 int se_dev_set_pi_prot_type(struct se_device *dev, int flag)
942 int rc, old_prot = dev->dev_attrib.pi_prot_type;
944 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
945 pr_err("Illegal value %d for pi_prot_type\n", flag);
949 pr_err("DIF TYPE2 protection currently not supported\n");
952 if (dev->dev_attrib.hw_pi_prot_type) {
953 pr_warn("DIF protection enabled on underlying hardware,"
957 if (!dev->transport->init_prot || !dev->transport->free_prot) {
958 /* 0 is only allowed value for non-supporting backends */
962 pr_err("DIF protection not supported by backend: %s\n",
963 dev->transport->name);
966 if (!(dev->dev_flags & DF_CONFIGURED)) {
967 pr_err("DIF protection requires device to be configured\n");
970 if (dev->export_count) {
971 pr_err("dev[%p]: Unable to change SE Device PROT type while"
972 " export_count is %d\n", dev, dev->export_count);
976 dev->dev_attrib.pi_prot_type = flag;
978 if (flag && !old_prot) {
979 rc = dev->transport->init_prot(dev);
981 dev->dev_attrib.pi_prot_type = old_prot;
985 } else if (!flag && old_prot) {
986 dev->transport->free_prot(dev);
988 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
992 EXPORT_SYMBOL(se_dev_set_pi_prot_type);
994 int se_dev_set_pi_prot_format(struct se_device *dev, int flag)
1002 pr_err("Illegal value %d for pi_prot_format\n", flag);
1005 if (!dev->transport->format_prot) {
1006 pr_err("DIF protection format not supported by backend %s\n",
1007 dev->transport->name);
1010 if (!(dev->dev_flags & DF_CONFIGURED)) {
1011 pr_err("DIF protection format requires device to be configured\n");
1014 if (dev->export_count) {
1015 pr_err("dev[%p]: Unable to format SE Device PROT type while"
1016 " export_count is %d\n", dev, dev->export_count);
1020 rc = dev->transport->format_prot(dev);
1024 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
1028 EXPORT_SYMBOL(se_dev_set_pi_prot_format);
1030 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
1032 if ((flag != 0) && (flag != 1)) {
1033 pr_err("Illegal value %d\n", flag);
1036 dev->dev_attrib.enforce_pr_isids = flag;
1037 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
1038 (dev->dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
1041 EXPORT_SYMBOL(se_dev_set_enforce_pr_isids);
1043 int se_dev_set_force_pr_aptpl(struct se_device *dev, int flag)
1045 if ((flag != 0) && (flag != 1)) {
1046 printk(KERN_ERR "Illegal value %d\n", flag);
1049 if (dev->export_count) {
1050 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
1051 " export_count is %d\n", dev, dev->export_count);
1055 dev->dev_attrib.force_pr_aptpl = flag;
1056 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", dev, flag);
1059 EXPORT_SYMBOL(se_dev_set_force_pr_aptpl);
1061 int se_dev_set_is_nonrot(struct se_device *dev, int flag)
1063 if ((flag != 0) && (flag != 1)) {
1064 printk(KERN_ERR "Illegal value %d\n", flag);
1067 dev->dev_attrib.is_nonrot = flag;
1068 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
1072 EXPORT_SYMBOL(se_dev_set_is_nonrot);
1074 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
1077 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted"
1078 " reordering not implemented\n", dev);
1081 dev->dev_attrib.emulate_rest_reord = flag;
1082 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
1085 EXPORT_SYMBOL(se_dev_set_emulate_rest_reord);
1088 * Note, this can only be called on unexported SE Device Object.
1090 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
1092 if (dev->export_count) {
1093 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1094 " export_count is %d\n",
1095 dev, dev->export_count);
1099 pr_err("dev[%p]: Illegal ZERO value for queue"
1104 if (queue_depth > dev->dev_attrib.queue_depth) {
1105 if (queue_depth > dev->dev_attrib.hw_queue_depth) {
1106 pr_err("dev[%p]: Passed queue_depth:"
1107 " %u exceeds TCM/SE_Device MAX"
1108 " TCQ: %u\n", dev, queue_depth,
1109 dev->dev_attrib.hw_queue_depth);
1113 dev->dev_attrib.queue_depth = dev->queue_depth = queue_depth;
1114 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
1118 EXPORT_SYMBOL(se_dev_set_queue_depth);
1120 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
1122 if (dev->export_count) {
1123 pr_err("dev[%p]: Unable to change SE Device"
1124 " optimal_sectors while export_count is %d\n",
1125 dev, dev->export_count);
1128 if (optimal_sectors > dev->dev_attrib.hw_max_sectors) {
1129 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1130 " greater than hw_max_sectors: %u\n", dev,
1131 optimal_sectors, dev->dev_attrib.hw_max_sectors);
1135 dev->dev_attrib.optimal_sectors = optimal_sectors;
1136 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1137 dev, optimal_sectors);
1140 EXPORT_SYMBOL(se_dev_set_optimal_sectors);
1142 int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1144 if (dev->export_count) {
1145 pr_err("dev[%p]: Unable to change SE Device block_size"
1146 " while export_count is %d\n",
1147 dev, dev->export_count);
1151 if ((block_size != 512) &&
1152 (block_size != 1024) &&
1153 (block_size != 2048) &&
1154 (block_size != 4096)) {
1155 pr_err("dev[%p]: Illegal value for block_device: %u"
1156 " for SE device, must be 512, 1024, 2048 or 4096\n",
1161 dev->dev_attrib.block_size = block_size;
1162 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1165 if (dev->dev_attrib.max_bytes_per_io)
1166 dev->dev_attrib.hw_max_sectors =
1167 dev->dev_attrib.max_bytes_per_io / block_size;
1171 EXPORT_SYMBOL(se_dev_set_block_size);
1173 struct se_lun *core_dev_add_lun(
1174 struct se_portal_group *tpg,
1175 struct se_device *dev,
1181 lun = core_tpg_alloc_lun(tpg, unpacked_lun);
1185 rc = core_tpg_add_lun(tpg, lun,
1186 TRANSPORT_LUNFLAGS_READ_WRITE, dev);
1190 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1191 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1192 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1193 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id);
1195 * Update LUN maps for dynamically added initiators when
1196 * generate_node_acl is enabled.
1198 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
1199 struct se_node_acl *acl;
1200 spin_lock_irq(&tpg->acl_node_lock);
1201 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
1202 if (acl->dynamic_node_acl &&
1203 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
1204 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
1205 spin_unlock_irq(&tpg->acl_node_lock);
1206 core_tpg_add_node_to_devs(acl, tpg);
1207 spin_lock_irq(&tpg->acl_node_lock);
1210 spin_unlock_irq(&tpg->acl_node_lock);
1216 /* core_dev_del_lun():
1220 void core_dev_del_lun(
1221 struct se_portal_group *tpg,
1224 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivating %s Logical Unit from"
1225 " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
1226 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1227 tpg->se_tpg_tfo->get_fabric_name());
1229 core_tpg_remove_lun(tpg, lun);
1232 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1236 spin_lock(&tpg->tpg_lun_lock);
1237 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1238 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1239 "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1240 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1241 TRANSPORT_MAX_LUNS_PER_TPG-1,
1242 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1243 spin_unlock(&tpg->tpg_lun_lock);
1246 lun = tpg->tpg_lun_list[unpacked_lun];
1248 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
1249 pr_err("%s Logical Unit Number: %u is not free on"
1250 " Target Portal Group: %hu, ignoring request.\n",
1251 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1252 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1253 spin_unlock(&tpg->tpg_lun_lock);
1256 spin_unlock(&tpg->tpg_lun_lock);
1261 /* core_dev_get_lun():
1265 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1269 spin_lock(&tpg->tpg_lun_lock);
1270 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1271 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1272 "_TPG-1: %u for Target Portal Group: %hu\n",
1273 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1274 TRANSPORT_MAX_LUNS_PER_TPG-1,
1275 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1276 spin_unlock(&tpg->tpg_lun_lock);
1279 lun = tpg->tpg_lun_list[unpacked_lun];
1281 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
1282 pr_err("%s Logical Unit Number: %u is not active on"
1283 " Target Portal Group: %hu, ignoring request.\n",
1284 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1285 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1286 spin_unlock(&tpg->tpg_lun_lock);
1289 spin_unlock(&tpg->tpg_lun_lock);
1294 struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1295 struct se_portal_group *tpg,
1296 struct se_node_acl *nacl,
1300 struct se_lun_acl *lacl;
1302 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) {
1303 pr_err("%s InitiatorName exceeds maximum size.\n",
1304 tpg->se_tpg_tfo->get_fabric_name());
1308 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
1310 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
1315 INIT_LIST_HEAD(&lacl->lacl_list);
1316 lacl->mapped_lun = mapped_lun;
1317 lacl->se_lun_nacl = nacl;
1318 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s",
1319 nacl->initiatorname);
1324 int core_dev_add_initiator_node_lun_acl(
1325 struct se_portal_group *tpg,
1326 struct se_lun_acl *lacl,
1331 struct se_node_acl *nacl;
1333 lun = core_dev_get_lun(tpg, unpacked_lun);
1335 pr_err("%s Logical Unit Number: %u is not active on"
1336 " Target Portal Group: %hu, ignoring request.\n",
1337 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1338 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1342 nacl = lacl->se_lun_nacl;
1346 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1347 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1348 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1352 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun,
1353 lun_access, nacl, tpg) < 0)
1356 spin_lock(&lun->lun_acl_lock);
1357 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
1358 atomic_inc_mb(&lun->lun_acl_count);
1359 spin_unlock(&lun->lun_acl_lock);
1361 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1362 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
1363 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
1364 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1365 lacl->initiatorname);
1367 * Check to see if there are any existing persistent reservation APTPL
1368 * pre-registrations that need to be enabled for this LUN ACL..
1370 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, nacl,
1375 /* core_dev_del_initiator_node_lun_acl():
1379 int core_dev_del_initiator_node_lun_acl(
1380 struct se_portal_group *tpg,
1382 struct se_lun_acl *lacl)
1384 struct se_node_acl *nacl;
1386 nacl = lacl->se_lun_nacl;
1390 spin_lock(&lun->lun_acl_lock);
1391 list_del(&lacl->lacl_list);
1392 atomic_dec_mb(&lun->lun_acl_count);
1393 spin_unlock(&lun->lun_acl_lock);
1395 core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun,
1396 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
1398 lacl->se_lun = NULL;
1400 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1401 " InitiatorNode: %s Mapped LUN: %u\n",
1402 tpg->se_tpg_tfo->get_fabric_name(),
1403 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1404 lacl->initiatorname, lacl->mapped_lun);
1409 void core_dev_free_initiator_node_lun_acl(
1410 struct se_portal_group *tpg,
1411 struct se_lun_acl *lacl)
1413 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1414 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1415 tpg->se_tpg_tfo->tpg_get_tag(tpg),
1416 tpg->se_tpg_tfo->get_fabric_name(),
1417 lacl->initiatorname, lacl->mapped_lun);
1422 static void scsi_dump_inquiry(struct se_device *dev)
1424 struct t10_wwn *wwn = &dev->t10_wwn;
1428 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer
1430 for (i = 0; i < 8; i++)
1431 if (wwn->vendor[i] >= 0x20)
1432 buf[i] = wwn->vendor[i];
1436 pr_debug(" Vendor: %s\n", buf);
1438 for (i = 0; i < 16; i++)
1439 if (wwn->model[i] >= 0x20)
1440 buf[i] = wwn->model[i];
1444 pr_debug(" Model: %s\n", buf);
1446 for (i = 0; i < 4; i++)
1447 if (wwn->revision[i] >= 0x20)
1448 buf[i] = wwn->revision[i];
1452 pr_debug(" Revision: %s\n", buf);
1454 device_type = dev->transport->get_device_type(dev);
1455 pr_debug(" Type: %s ", scsi_device_type(device_type));
1458 struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
1460 struct se_device *dev;
1461 struct se_lun *xcopy_lun;
1463 dev = hba->transport->alloc_device(hba, name);
1467 dev->dev_link_magic = SE_DEV_LINK_MAGIC;
1469 dev->transport = hba->transport;
1470 dev->prot_length = sizeof(struct se_dif_v1_tuple);
1472 INIT_LIST_HEAD(&dev->dev_list);
1473 INIT_LIST_HEAD(&dev->dev_sep_list);
1474 INIT_LIST_HEAD(&dev->dev_tmr_list);
1475 INIT_LIST_HEAD(&dev->delayed_cmd_list);
1476 INIT_LIST_HEAD(&dev->state_list);
1477 INIT_LIST_HEAD(&dev->qf_cmd_list);
1478 INIT_LIST_HEAD(&dev->g_dev_node);
1479 spin_lock_init(&dev->execute_task_lock);
1480 spin_lock_init(&dev->delayed_cmd_lock);
1481 spin_lock_init(&dev->dev_reservation_lock);
1482 spin_lock_init(&dev->se_port_lock);
1483 spin_lock_init(&dev->se_tmr_lock);
1484 spin_lock_init(&dev->qf_cmd_lock);
1485 sema_init(&dev->caw_sem, 1);
1486 atomic_set(&dev->dev_ordered_id, 0);
1487 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list);
1488 spin_lock_init(&dev->t10_wwn.t10_vpd_lock);
1489 INIT_LIST_HEAD(&dev->t10_pr.registration_list);
1490 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list);
1491 spin_lock_init(&dev->t10_pr.registration_lock);
1492 spin_lock_init(&dev->t10_pr.aptpl_reg_lock);
1493 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list);
1494 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock);
1495 INIT_LIST_HEAD(&dev->t10_alua.lba_map_list);
1496 spin_lock_init(&dev->t10_alua.lba_map_lock);
1498 dev->t10_wwn.t10_dev = dev;
1499 dev->t10_alua.t10_dev = dev;
1501 dev->dev_attrib.da_dev = dev;
1502 dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS;
1503 dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO;
1504 dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
1505 dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
1506 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
1507 dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
1508 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS;
1509 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU;
1510 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
1511 dev->dev_attrib.emulate_caw = DA_EMULATE_CAW;
1512 dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC;
1513 dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT;
1514 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
1515 dev->dev_attrib.force_pr_aptpl = DA_FORCE_PR_APTPL;
1516 dev->dev_attrib.is_nonrot = DA_IS_NONROT;
1517 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
1518 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
1519 dev->dev_attrib.max_unmap_block_desc_count =
1520 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
1521 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
1522 dev->dev_attrib.unmap_granularity_alignment =
1523 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
1524 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN;
1526 xcopy_lun = &dev->xcopy_lun;
1527 xcopy_lun->lun_se_dev = dev;
1528 init_completion(&xcopy_lun->lun_shutdown_comp);
1529 INIT_LIST_HEAD(&xcopy_lun->lun_acl_list);
1530 spin_lock_init(&xcopy_lun->lun_acl_lock);
1531 spin_lock_init(&xcopy_lun->lun_sep_lock);
1532 init_completion(&xcopy_lun->lun_ref_comp);
1537 int target_configure_device(struct se_device *dev)
1539 struct se_hba *hba = dev->se_hba;
1542 if (dev->dev_flags & DF_CONFIGURED) {
1543 pr_err("se_dev->se_dev_ptr already set for storage"
1548 ret = dev->transport->configure_device(dev);
1552 * XXX: there is not much point to have two different values here..
1554 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size;
1555 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth;
1558 * Align max_hw_sectors down to PAGE_SIZE I/O transfers
1560 dev->dev_attrib.hw_max_sectors =
1561 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors,
1562 dev->dev_attrib.hw_block_size);
1563 dev->dev_attrib.optimal_sectors = dev->dev_attrib.hw_max_sectors;
1565 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX);
1566 dev->creation_time = get_jiffies_64();
1568 ret = core_setup_alua(dev);
1573 * Startup the struct se_device processing thread
1575 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1,
1576 dev->transport->name);
1578 pr_err("Unable to create tmr workqueue for %s\n",
1579 dev->transport->name);
1585 * Setup work_queue for QUEUE_FULL
1587 INIT_WORK(&dev->qf_work_queue, target_qf_do_work);
1590 * Preload the initial INQUIRY const values if we are doing
1591 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI
1592 * passthrough because this is being provided by the backend LLD.
1594 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) {
1595 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8);
1596 strncpy(&dev->t10_wwn.model[0],
1597 dev->transport->inquiry_prod, 16);
1598 strncpy(&dev->t10_wwn.revision[0],
1599 dev->transport->inquiry_rev, 4);
1602 scsi_dump_inquiry(dev);
1604 spin_lock(&hba->device_lock);
1606 spin_unlock(&hba->device_lock);
1608 mutex_lock(&g_device_mutex);
1609 list_add_tail(&dev->g_dev_node, &g_device_list);
1610 mutex_unlock(&g_device_mutex);
1612 dev->dev_flags |= DF_CONFIGURED;
1617 core_alua_free_lu_gp_mem(dev);
1619 se_release_vpd_for_dev(dev);
1623 void target_free_device(struct se_device *dev)
1625 struct se_hba *hba = dev->se_hba;
1627 WARN_ON(!list_empty(&dev->dev_sep_list));
1629 if (dev->dev_flags & DF_CONFIGURED) {
1630 destroy_workqueue(dev->tmr_wq);
1632 mutex_lock(&g_device_mutex);
1633 list_del(&dev->g_dev_node);
1634 mutex_unlock(&g_device_mutex);
1636 spin_lock(&hba->device_lock);
1638 spin_unlock(&hba->device_lock);
1641 core_alua_free_lu_gp_mem(dev);
1642 core_alua_set_lba_map(dev, NULL, 0, 0);
1643 core_scsi3_free_all_registrations(dev);
1644 se_release_vpd_for_dev(dev);
1646 if (dev->transport->free_prot)
1647 dev->transport->free_prot(dev);
1649 dev->transport->free_device(dev);
1652 int core_dev_setup_virtual_lun0(void)
1655 struct se_device *dev;
1656 char buf[] = "rd_pages=8,rd_nullio=1";
1659 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
1661 return PTR_ERR(hba);
1663 dev = target_alloc_device(hba, "virt_lun0");
1669 hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf));
1671 ret = target_configure_device(dev);
1673 goto out_free_se_dev;
1680 target_free_device(dev);
1682 core_delete_hba(hba);
1687 void core_dev_release_virtual_lun0(void)
1689 struct se_hba *hba = lun0_hba;
1695 target_free_device(g_lun0_dev);
1696 core_delete_hba(hba);