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>
36 #include <asm/unaligned.h>
39 #include <scsi/scsi_common.h>
40 #include <scsi/scsi_proto.h>
42 #include <target/target_core_base.h>
43 #include <target/target_core_backend.h>
44 #include <target/target_core_fabric.h>
46 #include "target_core_internal.h"
47 #include "target_core_alua.h"
48 #include "target_core_pr.h"
49 #include "target_core_ua.h"
51 DEFINE_MUTEX(g_device_mutex);
52 LIST_HEAD(g_device_list);
54 static struct se_hba *lun0_hba;
55 /* not static, needed by tpg.c */
56 struct se_device *g_lun0_dev;
59 transport_lookup_cmd_lun(struct se_cmd *se_cmd, u64 unpacked_lun)
61 struct se_lun *se_lun = NULL;
62 struct se_session *se_sess = se_cmd->se_sess;
63 struct se_node_acl *nacl = se_sess->se_node_acl;
64 struct se_dev_entry *deve;
67 deve = target_nacl_find_deve(nacl, unpacked_lun);
69 atomic_long_inc(&deve->total_cmds);
71 if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
72 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
73 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
74 " Access for 0x%08llx\n",
75 se_cmd->se_tfo->get_fabric_name(),
78 return TCM_WRITE_PROTECTED;
81 if (se_cmd->data_direction == DMA_TO_DEVICE)
82 atomic_long_add(se_cmd->data_length,
84 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
85 atomic_long_add(se_cmd->data_length,
88 se_lun = rcu_dereference(deve->se_lun);
89 se_cmd->se_lun = rcu_dereference(deve->se_lun);
90 se_cmd->pr_res_key = deve->pr_res_key;
91 se_cmd->orig_fe_lun = unpacked_lun;
92 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
94 percpu_ref_get(&se_lun->lun_ref);
95 se_cmd->lun_ref_active = true;
101 * Use the se_portal_group->tpg_virt_lun0 to allow for
102 * REPORT_LUNS, et al to be returned when no active
103 * MappedLUN=0 exists for this Initiator Port.
105 if (unpacked_lun != 0) {
106 pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
107 " Access for 0x%08llx\n",
108 se_cmd->se_tfo->get_fabric_name(),
110 return TCM_NON_EXISTENT_LUN;
113 * Force WRITE PROTECT for virtual LUN 0
115 if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
116 (se_cmd->data_direction != DMA_NONE))
117 return TCM_WRITE_PROTECTED;
119 se_lun = se_sess->se_tpg->tpg_virt_lun0;
120 se_cmd->se_lun = se_sess->se_tpg->tpg_virt_lun0;
121 se_cmd->orig_fe_lun = 0;
122 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
124 percpu_ref_get(&se_lun->lun_ref);
125 se_cmd->lun_ref_active = true;
128 * RCU reference protected by percpu se_lun->lun_ref taken above that
129 * must drop to zero (including initial reference) before this se_lun
130 * pointer can be kfree_rcu() by the final se_lun->lun_group put via
131 * target_core_fabric_configfs.c:target_fabric_port_release
133 se_cmd->se_dev = rcu_dereference_raw(se_lun->lun_se_dev);
134 atomic_long_inc(&se_cmd->se_dev->num_cmds);
136 if (se_cmd->data_direction == DMA_TO_DEVICE)
137 atomic_long_add(se_cmd->data_length,
138 &se_cmd->se_dev->write_bytes);
139 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
140 atomic_long_add(se_cmd->data_length,
141 &se_cmd->se_dev->read_bytes);
145 EXPORT_SYMBOL(transport_lookup_cmd_lun);
147 int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u64 unpacked_lun)
149 struct se_dev_entry *deve;
150 struct se_lun *se_lun = NULL;
151 struct se_session *se_sess = se_cmd->se_sess;
152 struct se_node_acl *nacl = se_sess->se_node_acl;
153 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
157 deve = target_nacl_find_deve(nacl, unpacked_lun);
159 se_tmr->tmr_lun = rcu_dereference(deve->se_lun);
160 se_cmd->se_lun = rcu_dereference(deve->se_lun);
161 se_lun = rcu_dereference(deve->se_lun);
162 se_cmd->pr_res_key = deve->pr_res_key;
163 se_cmd->orig_fe_lun = unpacked_lun;
168 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
169 " Access for 0x%08llx\n",
170 se_cmd->se_tfo->get_fabric_name(),
175 * XXX: Add percpu se_lun->lun_ref reference count for TMR
177 se_cmd->se_dev = rcu_dereference_raw(se_lun->lun_se_dev);
178 se_tmr->tmr_dev = rcu_dereference_raw(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);
188 bool target_lun_is_rdonly(struct se_cmd *cmd)
190 struct se_session *se_sess = cmd->se_sess;
191 struct se_dev_entry *deve;
195 deve = target_nacl_find_deve(se_sess->se_node_acl, cmd->orig_fe_lun);
196 ret = (deve && deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY);
201 EXPORT_SYMBOL(target_lun_is_rdonly);
204 * This function is called from core_scsi3_emulate_pro_register_and_move()
205 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_kref
206 * when a matching rtpi is found.
208 struct se_dev_entry *core_get_se_deve_from_rtpi(
209 struct se_node_acl *nacl,
212 struct se_dev_entry *deve;
214 struct se_portal_group *tpg = nacl->se_tpg;
217 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) {
218 lun = rcu_dereference(deve->se_lun);
220 pr_err("%s device entries device pointer is"
221 " NULL, but Initiator has access.\n",
222 tpg->se_tpg_tfo->get_fabric_name());
225 if (lun->lun_rtpi != rtpi)
228 kref_get(&deve->pr_kref);
238 void core_free_device_list_for_node(
239 struct se_node_acl *nacl,
240 struct se_portal_group *tpg)
242 struct se_dev_entry *deve;
244 mutex_lock(&nacl->lun_entry_mutex);
245 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) {
246 struct se_lun *lun = rcu_dereference_check(deve->se_lun,
247 lockdep_is_held(&nacl->lun_entry_mutex));
248 core_disable_device_list_for_node(lun, deve, nacl, tpg);
250 mutex_unlock(&nacl->lun_entry_mutex);
253 void core_update_device_list_access(
256 struct se_node_acl *nacl)
258 struct se_dev_entry *deve;
260 mutex_lock(&nacl->lun_entry_mutex);
261 deve = target_nacl_find_deve(nacl, mapped_lun);
263 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
264 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
265 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
267 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
268 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
271 mutex_unlock(&nacl->lun_entry_mutex);
275 * Called with rcu_read_lock or nacl->device_list_lock held.
277 struct se_dev_entry *target_nacl_find_deve(struct se_node_acl *nacl, u64 mapped_lun)
279 struct se_dev_entry *deve;
281 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link)
282 if (deve->mapped_lun == mapped_lun)
287 EXPORT_SYMBOL(target_nacl_find_deve);
289 void target_pr_kref_release(struct kref *kref)
291 struct se_dev_entry *deve = container_of(kref, struct se_dev_entry,
293 complete(&deve->pr_comp);
297 target_luns_data_has_changed(struct se_node_acl *nacl, struct se_dev_entry *new,
300 struct se_dev_entry *tmp;
303 hlist_for_each_entry_rcu(tmp, &nacl->lun_entry_hlist, link) {
304 if (skip_new && tmp == new)
306 core_scsi3_ua_allocate(tmp, 0x3F,
307 ASCQ_3FH_REPORTED_LUNS_DATA_HAS_CHANGED);
312 int core_enable_device_list_for_node(
314 struct se_lun_acl *lun_acl,
317 struct se_node_acl *nacl,
318 struct se_portal_group *tpg)
320 struct se_dev_entry *orig, *new;
322 new = kzalloc(sizeof(*new), GFP_KERNEL);
324 pr_err("Unable to allocate se_dev_entry memory\n");
328 atomic_set(&new->ua_count, 0);
329 spin_lock_init(&new->ua_lock);
330 INIT_LIST_HEAD(&new->ua_list);
331 INIT_LIST_HEAD(&new->lun_link);
333 new->mapped_lun = mapped_lun;
334 kref_init(&new->pr_kref);
335 init_completion(&new->pr_comp);
337 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)
338 new->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
340 new->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
342 new->creation_time = get_jiffies_64();
345 mutex_lock(&nacl->lun_entry_mutex);
346 orig = target_nacl_find_deve(nacl, mapped_lun);
347 if (orig && orig->se_lun) {
348 struct se_lun *orig_lun = rcu_dereference_check(orig->se_lun,
349 lockdep_is_held(&nacl->lun_entry_mutex));
351 if (orig_lun != lun) {
352 pr_err("Existing orig->se_lun doesn't match new lun"
353 " for dynamic -> explicit NodeACL conversion:"
354 " %s\n", nacl->initiatorname);
355 mutex_unlock(&nacl->lun_entry_mutex);
359 BUG_ON(orig->se_lun_acl != NULL);
361 rcu_assign_pointer(new->se_lun, lun);
362 rcu_assign_pointer(new->se_lun_acl, lun_acl);
363 hlist_del_rcu(&orig->link);
364 hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist);
365 mutex_unlock(&nacl->lun_entry_mutex);
367 spin_lock(&lun->lun_deve_lock);
368 list_del(&orig->lun_link);
369 list_add_tail(&new->lun_link, &lun->lun_deve_list);
370 spin_unlock(&lun->lun_deve_lock);
372 kref_put(&orig->pr_kref, target_pr_kref_release);
373 wait_for_completion(&orig->pr_comp);
375 target_luns_data_has_changed(nacl, new, true);
376 kfree_rcu(orig, rcu_head);
380 rcu_assign_pointer(new->se_lun, lun);
381 rcu_assign_pointer(new->se_lun_acl, lun_acl);
382 hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist);
383 mutex_unlock(&nacl->lun_entry_mutex);
385 spin_lock(&lun->lun_deve_lock);
386 list_add_tail(&new->lun_link, &lun->lun_deve_list);
387 spin_unlock(&lun->lun_deve_lock);
389 target_luns_data_has_changed(nacl, new, true);
394 * Called with se_node_acl->lun_entry_mutex held.
396 void core_disable_device_list_for_node(
398 struct se_dev_entry *orig,
399 struct se_node_acl *nacl,
400 struct se_portal_group *tpg)
403 * rcu_dereference_raw protected by se_lun->lun_group symlink
404 * reference to se_device->dev_group.
406 struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev);
408 * If the MappedLUN entry is being disabled, the entry in
409 * lun->lun_deve_list must be removed now before clearing the
410 * struct se_dev_entry pointers below as logic in
411 * core_alua_do_transition_tg_pt() depends on these being present.
413 * deve->se_lun_acl will be NULL for demo-mode created LUNs
414 * that have not been explicitly converted to MappedLUNs ->
415 * struct se_lun_acl, but we remove deve->lun_link from
416 * lun->lun_deve_list. This also means that active UAs and
417 * NodeACL context specific PR metadata for demo-mode
418 * MappedLUN *deve will be released below..
420 spin_lock(&lun->lun_deve_lock);
421 list_del(&orig->lun_link);
422 spin_unlock(&lun->lun_deve_lock);
424 * Disable struct se_dev_entry LUN ACL mapping
426 core_scsi3_ua_release_all(orig);
428 hlist_del_rcu(&orig->link);
429 clear_bit(DEF_PR_REG_ACTIVE, &orig->deve_flags);
430 rcu_assign_pointer(orig->se_lun, NULL);
431 rcu_assign_pointer(orig->se_lun_acl, NULL);
433 orig->creation_time = 0;
434 orig->attach_count--;
436 * Before firing off RCU callback, wait for any in process SPEC_I_PT=1
437 * or REGISTER_AND_MOVE PR operation to complete.
439 kref_put(&orig->pr_kref, target_pr_kref_release);
440 wait_for_completion(&orig->pr_comp);
442 kfree_rcu(orig, rcu_head);
444 core_scsi3_free_pr_reg_from_nacl(dev, nacl);
445 target_luns_data_has_changed(nacl, NULL, false);
448 /* core_clear_lun_from_tpg():
452 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
454 struct se_node_acl *nacl;
455 struct se_dev_entry *deve;
457 mutex_lock(&tpg->acl_node_mutex);
458 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
460 mutex_lock(&nacl->lun_entry_mutex);
461 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) {
462 struct se_lun *tmp_lun = rcu_dereference_check(deve->se_lun,
463 lockdep_is_held(&nacl->lun_entry_mutex));
468 core_disable_device_list_for_node(lun, deve, nacl, tpg);
470 mutex_unlock(&nacl->lun_entry_mutex);
472 mutex_unlock(&tpg->acl_node_mutex);
475 int core_alloc_rtpi(struct se_lun *lun, struct se_device *dev)
479 spin_lock(&dev->se_port_lock);
480 if (dev->export_count == 0x0000ffff) {
481 pr_warn("Reached dev->dev_port_count =="
483 spin_unlock(&dev->se_port_lock);
488 * Allocate the next RELATIVE TARGET PORT IDENTIFIER for this struct se_device
489 * Here is the table from spc4r17 section 7.7.3.8.
491 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
495 * 1h Relative port 1, historically known as port A
496 * 2h Relative port 2, historically known as port B
497 * 3h to FFFFh Relative port 3 through 65 535
499 lun->lun_rtpi = dev->dev_rpti_counter++;
503 list_for_each_entry(tmp, &dev->dev_sep_list, lun_dev_link) {
505 * Make sure RELATIVE TARGET PORT IDENTIFIER is unique
508 if (lun->lun_rtpi == tmp->lun_rtpi)
511 spin_unlock(&dev->se_port_lock);
516 static void se_release_vpd_for_dev(struct se_device *dev)
518 struct t10_vpd *vpd, *vpd_tmp;
520 spin_lock(&dev->t10_wwn.t10_vpd_lock);
521 list_for_each_entry_safe(vpd, vpd_tmp,
522 &dev->t10_wwn.t10_vpd_list, vpd_list) {
523 list_del(&vpd->vpd_list);
526 spin_unlock(&dev->t10_wwn.t10_vpd_lock);
529 static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
531 u32 aligned_max_sectors;
534 * Limit max_sectors to a PAGE_SIZE aligned value for modern
535 * transport_allocate_data_tasks() operation.
537 alignment = max(1ul, PAGE_SIZE / block_size);
538 aligned_max_sectors = rounddown(max_sectors, alignment);
540 if (max_sectors != aligned_max_sectors)
541 pr_info("Rounding down aligned max_sectors from %u to %u\n",
542 max_sectors, aligned_max_sectors);
544 return aligned_max_sectors;
547 int core_dev_add_lun(
548 struct se_portal_group *tpg,
549 struct se_device *dev,
554 rc = core_tpg_add_lun(tpg, lun,
555 TRANSPORT_LUNFLAGS_READ_WRITE, dev);
559 pr_debug("%s_TPG[%u]_LUN[%llu] - Activated %s Logical Unit from"
560 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
561 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
562 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id);
564 * Update LUN maps for dynamically added initiators when
565 * generate_node_acl is enabled.
567 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
568 struct se_node_acl *acl;
570 mutex_lock(&tpg->acl_node_mutex);
571 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
572 if (acl->dynamic_node_acl &&
573 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
574 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
575 core_tpg_add_node_to_devs(acl, tpg, lun);
578 mutex_unlock(&tpg->acl_node_mutex);
584 /* core_dev_del_lun():
588 void core_dev_del_lun(
589 struct se_portal_group *tpg,
592 pr_debug("%s_TPG[%u]_LUN[%llu] - Deactivating %s Logical Unit from"
593 " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
594 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
595 tpg->se_tpg_tfo->get_fabric_name());
597 core_tpg_remove_lun(tpg, lun);
600 struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
601 struct se_portal_group *tpg,
602 struct se_node_acl *nacl,
606 struct se_lun_acl *lacl;
608 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) {
609 pr_err("%s InitiatorName exceeds maximum size.\n",
610 tpg->se_tpg_tfo->get_fabric_name());
614 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
616 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
621 lacl->mapped_lun = mapped_lun;
622 lacl->se_lun_nacl = nacl;
627 int core_dev_add_initiator_node_lun_acl(
628 struct se_portal_group *tpg,
629 struct se_lun_acl *lacl,
633 struct se_node_acl *nacl = lacl->se_lun_nacl;
635 * rcu_dereference_raw protected by se_lun->lun_group symlink
636 * reference to se_device->dev_group.
638 struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev);
643 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
644 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
645 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
649 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun,
650 lun_access, nacl, tpg) < 0)
653 pr_debug("%s_TPG[%hu]_LUN[%llu->%llu] - Added %s ACL for "
654 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
655 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, lacl->mapped_lun,
656 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
657 nacl->initiatorname);
659 * Check to see if there are any existing persistent reservation APTPL
660 * pre-registrations that need to be enabled for this LUN ACL..
662 core_scsi3_check_aptpl_registration(dev, tpg, lun, nacl,
667 int core_dev_del_initiator_node_lun_acl(
669 struct se_lun_acl *lacl)
671 struct se_portal_group *tpg = lun->lun_tpg;
672 struct se_node_acl *nacl;
673 struct se_dev_entry *deve;
675 nacl = lacl->se_lun_nacl;
679 mutex_lock(&nacl->lun_entry_mutex);
680 deve = target_nacl_find_deve(nacl, lacl->mapped_lun);
682 core_disable_device_list_for_node(lun, deve, nacl, tpg);
683 mutex_unlock(&nacl->lun_entry_mutex);
685 pr_debug("%s_TPG[%hu]_LUN[%llu] - Removed ACL for"
686 " InitiatorNode: %s Mapped LUN: %llu\n",
687 tpg->se_tpg_tfo->get_fabric_name(),
688 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
689 nacl->initiatorname, lacl->mapped_lun);
694 void core_dev_free_initiator_node_lun_acl(
695 struct se_portal_group *tpg,
696 struct se_lun_acl *lacl)
698 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
699 " Mapped LUN: %llu\n", tpg->se_tpg_tfo->get_fabric_name(),
700 tpg->se_tpg_tfo->tpg_get_tag(tpg),
701 tpg->se_tpg_tfo->get_fabric_name(),
702 lacl->se_lun_nacl->initiatorname, lacl->mapped_lun);
707 static void scsi_dump_inquiry(struct se_device *dev)
709 struct t10_wwn *wwn = &dev->t10_wwn;
713 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer
715 for (i = 0; i < 8; i++)
716 if (wwn->vendor[i] >= 0x20)
717 buf[i] = wwn->vendor[i];
721 pr_debug(" Vendor: %s\n", buf);
723 for (i = 0; i < 16; i++)
724 if (wwn->model[i] >= 0x20)
725 buf[i] = wwn->model[i];
729 pr_debug(" Model: %s\n", buf);
731 for (i = 0; i < 4; i++)
732 if (wwn->revision[i] >= 0x20)
733 buf[i] = wwn->revision[i];
737 pr_debug(" Revision: %s\n", buf);
739 device_type = dev->transport->get_device_type(dev);
740 pr_debug(" Type: %s ", scsi_device_type(device_type));
743 struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
745 struct se_device *dev;
746 struct se_lun *xcopy_lun;
748 dev = hba->backend->ops->alloc_device(hba, name);
752 dev->dev_link_magic = SE_DEV_LINK_MAGIC;
754 dev->transport = hba->backend->ops;
755 dev->prot_length = sizeof(struct t10_pi_tuple);
756 dev->hba_index = hba->hba_index;
758 INIT_LIST_HEAD(&dev->dev_list);
759 INIT_LIST_HEAD(&dev->dev_sep_list);
760 INIT_LIST_HEAD(&dev->dev_tmr_list);
761 INIT_LIST_HEAD(&dev->delayed_cmd_list);
762 INIT_LIST_HEAD(&dev->state_list);
763 INIT_LIST_HEAD(&dev->qf_cmd_list);
764 INIT_LIST_HEAD(&dev->g_dev_node);
765 spin_lock_init(&dev->execute_task_lock);
766 spin_lock_init(&dev->delayed_cmd_lock);
767 spin_lock_init(&dev->dev_reservation_lock);
768 spin_lock_init(&dev->se_port_lock);
769 spin_lock_init(&dev->se_tmr_lock);
770 spin_lock_init(&dev->qf_cmd_lock);
771 sema_init(&dev->caw_sem, 1);
772 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list);
773 spin_lock_init(&dev->t10_wwn.t10_vpd_lock);
774 INIT_LIST_HEAD(&dev->t10_pr.registration_list);
775 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list);
776 spin_lock_init(&dev->t10_pr.registration_lock);
777 spin_lock_init(&dev->t10_pr.aptpl_reg_lock);
778 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list);
779 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock);
780 INIT_LIST_HEAD(&dev->t10_alua.lba_map_list);
781 spin_lock_init(&dev->t10_alua.lba_map_lock);
783 dev->t10_wwn.t10_dev = dev;
784 dev->t10_alua.t10_dev = dev;
786 dev->dev_attrib.da_dev = dev;
787 dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS;
788 dev->dev_attrib.emulate_dpo = 1;
789 dev->dev_attrib.emulate_fua_write = 1;
790 dev->dev_attrib.emulate_fua_read = 1;
791 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
792 dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
793 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS;
794 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU;
795 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
796 dev->dev_attrib.emulate_caw = DA_EMULATE_CAW;
797 dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC;
798 dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT;
799 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
800 dev->dev_attrib.force_pr_aptpl = DA_FORCE_PR_APTPL;
801 dev->dev_attrib.is_nonrot = DA_IS_NONROT;
802 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
803 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
804 dev->dev_attrib.max_unmap_block_desc_count =
805 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
806 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
807 dev->dev_attrib.unmap_granularity_alignment =
808 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
809 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN;
811 xcopy_lun = &dev->xcopy_lun;
812 rcu_assign_pointer(xcopy_lun->lun_se_dev, dev);
813 init_completion(&xcopy_lun->lun_ref_comp);
814 INIT_LIST_HEAD(&xcopy_lun->lun_deve_list);
815 INIT_LIST_HEAD(&xcopy_lun->lun_dev_link);
816 mutex_init(&xcopy_lun->lun_tg_pt_md_mutex);
817 xcopy_lun->lun_tpg = &xcopy_pt_tpg;
822 int target_configure_device(struct se_device *dev)
824 struct se_hba *hba = dev->se_hba;
827 if (dev->dev_flags & DF_CONFIGURED) {
828 pr_err("se_dev->se_dev_ptr already set for storage"
833 ret = dev->transport->configure_device(dev);
837 * XXX: there is not much point to have two different values here..
839 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size;
840 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth;
843 * Align max_hw_sectors down to PAGE_SIZE I/O transfers
845 dev->dev_attrib.hw_max_sectors =
846 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors,
847 dev->dev_attrib.hw_block_size);
848 dev->dev_attrib.optimal_sectors = dev->dev_attrib.hw_max_sectors;
850 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX);
851 dev->creation_time = get_jiffies_64();
853 ret = core_setup_alua(dev);
858 * Startup the struct se_device processing thread
860 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1,
861 dev->transport->name);
863 pr_err("Unable to create tmr workqueue for %s\n",
864 dev->transport->name);
870 * Setup work_queue for QUEUE_FULL
872 INIT_WORK(&dev->qf_work_queue, target_qf_do_work);
875 * Preload the initial INQUIRY const values if we are doing
876 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI
877 * passthrough because this is being provided by the backend LLD.
879 if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)) {
880 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8);
881 strncpy(&dev->t10_wwn.model[0],
882 dev->transport->inquiry_prod, 16);
883 strncpy(&dev->t10_wwn.revision[0],
884 dev->transport->inquiry_rev, 4);
887 scsi_dump_inquiry(dev);
889 spin_lock(&hba->device_lock);
891 spin_unlock(&hba->device_lock);
893 mutex_lock(&g_device_mutex);
894 list_add_tail(&dev->g_dev_node, &g_device_list);
895 mutex_unlock(&g_device_mutex);
897 dev->dev_flags |= DF_CONFIGURED;
902 core_alua_free_lu_gp_mem(dev);
904 se_release_vpd_for_dev(dev);
908 void target_free_device(struct se_device *dev)
910 struct se_hba *hba = dev->se_hba;
912 WARN_ON(!list_empty(&dev->dev_sep_list));
914 if (dev->dev_flags & DF_CONFIGURED) {
915 destroy_workqueue(dev->tmr_wq);
917 mutex_lock(&g_device_mutex);
918 list_del(&dev->g_dev_node);
919 mutex_unlock(&g_device_mutex);
921 spin_lock(&hba->device_lock);
923 spin_unlock(&hba->device_lock);
926 core_alua_free_lu_gp_mem(dev);
927 core_alua_set_lba_map(dev, NULL, 0, 0);
928 core_scsi3_free_all_registrations(dev);
929 se_release_vpd_for_dev(dev);
931 if (dev->transport->free_prot)
932 dev->transport->free_prot(dev);
934 dev->transport->free_device(dev);
937 int core_dev_setup_virtual_lun0(void)
940 struct se_device *dev;
941 char buf[] = "rd_pages=8,rd_nullio=1";
944 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
948 dev = target_alloc_device(hba, "virt_lun0");
954 hba->backend->ops->set_configfs_dev_params(dev, buf, sizeof(buf));
956 ret = target_configure_device(dev);
958 goto out_free_se_dev;
965 target_free_device(dev);
967 core_delete_hba(hba);
972 void core_dev_release_virtual_lun0(void)
974 struct se_hba *hba = lun0_hba;
980 target_free_device(g_lun0_dev);
981 core_delete_hba(hba);
985 * Common CDB parsing for kernel and user passthrough.
988 passthrough_parse_cdb(struct se_cmd *cmd,
989 sense_reason_t (*exec_cmd)(struct se_cmd *cmd))
991 unsigned char *cdb = cmd->t_task_cdb;
994 * Clear a lun set in the cdb if the initiator talking to use spoke
995 * and old standards version, as we can't assume the underlying device
996 * won't choke up on it.
999 case READ_10: /* SBC - RDProtect */
1000 case READ_12: /* SBC - RDProtect */
1001 case READ_16: /* SBC - RDProtect */
1002 case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */
1003 case VERIFY: /* SBC - VRProtect */
1004 case VERIFY_16: /* SBC - VRProtect */
1005 case WRITE_VERIFY: /* SBC - VRProtect */
1006 case WRITE_VERIFY_12: /* SBC - VRProtect */
1007 case MAINTENANCE_IN: /* SPC - Parameter Data Format for SA RTPG */
1010 cdb[1] &= 0x1f; /* clear logical unit number */
1015 * For REPORT LUNS we always need to emulate the response, for everything
1018 if (cdb[0] == REPORT_LUNS) {
1019 cmd->execute_cmd = spc_emulate_report_luns;
1020 return TCM_NO_SENSE;
1023 /* Set DATA_CDB flag for ops that should have it */
1034 case WRITE_VERIFY_12:
1035 case 0x8e: /* WRITE_VERIFY_16 */
1036 case COMPARE_AND_WRITE:
1037 case XDWRITEREAD_10:
1038 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1040 case VARIABLE_LENGTH_CMD:
1041 switch (get_unaligned_be16(&cdb[8])) {
1044 case 0x0c: /* WRITE_VERIFY_32 */
1045 case XDWRITEREAD_32:
1046 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1051 cmd->execute_cmd = exec_cmd;
1053 return TCM_NO_SENSE;
1055 EXPORT_SYMBOL(passthrough_parse_cdb);