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;
65 sense_reason_t ret = TCM_NO_SENSE;
68 deve = target_nacl_find_deve(nacl, unpacked_lun);
70 atomic_long_inc(&deve->total_cmds);
72 if (se_cmd->data_direction == DMA_TO_DEVICE)
73 atomic_long_add(se_cmd->data_length,
75 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
76 atomic_long_add(se_cmd->data_length,
79 se_lun = rcu_dereference(deve->se_lun);
81 if (!percpu_ref_tryget_live(&se_lun->lun_ref)) {
86 se_cmd->se_lun = rcu_dereference(deve->se_lun);
87 se_cmd->pr_res_key = deve->pr_res_key;
88 se_cmd->orig_fe_lun = unpacked_lun;
89 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
90 se_cmd->lun_ref_active = true;
92 if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
93 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
94 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
95 " Access for 0x%08llx\n",
96 se_cmd->se_tfo->get_fabric_name(),
99 ret = TCM_WRITE_PROTECTED;
108 * Use the se_portal_group->tpg_virt_lun0 to allow for
109 * REPORT_LUNS, et al to be returned when no active
110 * MappedLUN=0 exists for this Initiator Port.
112 if (unpacked_lun != 0) {
113 pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
114 " Access for 0x%08llx\n",
115 se_cmd->se_tfo->get_fabric_name(),
117 return TCM_NON_EXISTENT_LUN;
120 se_lun = se_sess->se_tpg->tpg_virt_lun0;
121 se_cmd->se_lun = se_sess->se_tpg->tpg_virt_lun0;
122 se_cmd->orig_fe_lun = 0;
123 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
125 percpu_ref_get(&se_lun->lun_ref);
126 se_cmd->lun_ref_active = true;
129 * Force WRITE PROTECT for virtual LUN 0
131 if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
132 (se_cmd->data_direction != DMA_NONE)) {
133 ret = TCM_WRITE_PROTECTED;
138 * RCU reference protected by percpu se_lun->lun_ref taken above that
139 * must drop to zero (including initial reference) before this se_lun
140 * pointer can be kfree_rcu() by the final se_lun->lun_group put via
141 * target_core_fabric_configfs.c:target_fabric_port_release
144 se_cmd->se_dev = rcu_dereference_raw(se_lun->lun_se_dev);
145 atomic_long_inc(&se_cmd->se_dev->num_cmds);
147 if (se_cmd->data_direction == DMA_TO_DEVICE)
148 atomic_long_add(se_cmd->data_length,
149 &se_cmd->se_dev->write_bytes);
150 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
151 atomic_long_add(se_cmd->data_length,
152 &se_cmd->se_dev->read_bytes);
156 EXPORT_SYMBOL(transport_lookup_cmd_lun);
158 int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u64 unpacked_lun)
160 struct se_dev_entry *deve;
161 struct se_lun *se_lun = NULL;
162 struct se_session *se_sess = se_cmd->se_sess;
163 struct se_node_acl *nacl = se_sess->se_node_acl;
164 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
168 deve = target_nacl_find_deve(nacl, unpacked_lun);
170 se_tmr->tmr_lun = rcu_dereference(deve->se_lun);
171 se_cmd->se_lun = rcu_dereference(deve->se_lun);
172 se_lun = rcu_dereference(deve->se_lun);
173 se_cmd->pr_res_key = deve->pr_res_key;
174 se_cmd->orig_fe_lun = unpacked_lun;
179 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
180 " Access for 0x%08llx\n",
181 se_cmd->se_tfo->get_fabric_name(),
186 * XXX: Add percpu se_lun->lun_ref reference count for TMR
188 se_cmd->se_dev = rcu_dereference_raw(se_lun->lun_se_dev);
189 se_tmr->tmr_dev = rcu_dereference_raw(se_lun->lun_se_dev);
191 spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags);
192 list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list);
193 spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags);
197 EXPORT_SYMBOL(transport_lookup_tmr_lun);
199 bool target_lun_is_rdonly(struct se_cmd *cmd)
201 struct se_session *se_sess = cmd->se_sess;
202 struct se_dev_entry *deve;
206 deve = target_nacl_find_deve(se_sess->se_node_acl, cmd->orig_fe_lun);
207 ret = (deve && deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY);
212 EXPORT_SYMBOL(target_lun_is_rdonly);
215 * This function is called from core_scsi3_emulate_pro_register_and_move()
216 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_kref
217 * when a matching rtpi is found.
219 struct se_dev_entry *core_get_se_deve_from_rtpi(
220 struct se_node_acl *nacl,
223 struct se_dev_entry *deve;
225 struct se_portal_group *tpg = nacl->se_tpg;
228 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) {
229 lun = rcu_dereference(deve->se_lun);
231 pr_err("%s device entries device pointer is"
232 " NULL, but Initiator has access.\n",
233 tpg->se_tpg_tfo->get_fabric_name());
236 if (lun->lun_rtpi != rtpi)
239 kref_get(&deve->pr_kref);
249 void core_free_device_list_for_node(
250 struct se_node_acl *nacl,
251 struct se_portal_group *tpg)
253 struct se_dev_entry *deve;
255 mutex_lock(&nacl->lun_entry_mutex);
256 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) {
257 struct se_lun *lun = rcu_dereference_check(deve->se_lun,
258 lockdep_is_held(&nacl->lun_entry_mutex));
259 core_disable_device_list_for_node(lun, deve, nacl, tpg);
261 mutex_unlock(&nacl->lun_entry_mutex);
264 void core_update_device_list_access(
267 struct se_node_acl *nacl)
269 struct se_dev_entry *deve;
271 mutex_lock(&nacl->lun_entry_mutex);
272 deve = target_nacl_find_deve(nacl, mapped_lun);
274 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
275 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
276 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
278 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
279 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
282 mutex_unlock(&nacl->lun_entry_mutex);
286 * Called with rcu_read_lock or nacl->device_list_lock held.
288 struct se_dev_entry *target_nacl_find_deve(struct se_node_acl *nacl, u64 mapped_lun)
290 struct se_dev_entry *deve;
292 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link)
293 if (deve->mapped_lun == mapped_lun)
298 EXPORT_SYMBOL(target_nacl_find_deve);
300 void target_pr_kref_release(struct kref *kref)
302 struct se_dev_entry *deve = container_of(kref, struct se_dev_entry,
304 complete(&deve->pr_comp);
308 target_luns_data_has_changed(struct se_node_acl *nacl, struct se_dev_entry *new,
311 struct se_dev_entry *tmp;
314 hlist_for_each_entry_rcu(tmp, &nacl->lun_entry_hlist, link) {
315 if (skip_new && tmp == new)
317 core_scsi3_ua_allocate(tmp, 0x3F,
318 ASCQ_3FH_REPORTED_LUNS_DATA_HAS_CHANGED);
323 int core_enable_device_list_for_node(
325 struct se_lun_acl *lun_acl,
328 struct se_node_acl *nacl,
329 struct se_portal_group *tpg)
331 struct se_dev_entry *orig, *new;
333 new = kzalloc(sizeof(*new), GFP_KERNEL);
335 pr_err("Unable to allocate se_dev_entry memory\n");
339 atomic_set(&new->ua_count, 0);
340 spin_lock_init(&new->ua_lock);
341 INIT_LIST_HEAD(&new->ua_list);
342 INIT_LIST_HEAD(&new->lun_link);
344 new->mapped_lun = mapped_lun;
345 kref_init(&new->pr_kref);
346 init_completion(&new->pr_comp);
348 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)
349 new->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
351 new->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
353 new->creation_time = get_jiffies_64();
356 mutex_lock(&nacl->lun_entry_mutex);
357 orig = target_nacl_find_deve(nacl, mapped_lun);
358 if (orig && orig->se_lun) {
359 struct se_lun *orig_lun = rcu_dereference_check(orig->se_lun,
360 lockdep_is_held(&nacl->lun_entry_mutex));
362 if (orig_lun != lun) {
363 pr_err("Existing orig->se_lun doesn't match new lun"
364 " for dynamic -> explicit NodeACL conversion:"
365 " %s\n", nacl->initiatorname);
366 mutex_unlock(&nacl->lun_entry_mutex);
370 if (orig->se_lun_acl != NULL) {
371 pr_warn_ratelimited("Detected existing explicit"
372 " se_lun_acl->se_lun_group reference for %s"
373 " mapped_lun: %llu, failing\n",
374 nacl->initiatorname, mapped_lun);
375 mutex_unlock(&nacl->lun_entry_mutex);
380 rcu_assign_pointer(new->se_lun, lun);
381 rcu_assign_pointer(new->se_lun_acl, lun_acl);
382 hlist_del_rcu(&orig->link);
383 hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist);
384 mutex_unlock(&nacl->lun_entry_mutex);
386 spin_lock(&lun->lun_deve_lock);
387 list_del(&orig->lun_link);
388 list_add_tail(&new->lun_link, &lun->lun_deve_list);
389 spin_unlock(&lun->lun_deve_lock);
391 kref_put(&orig->pr_kref, target_pr_kref_release);
392 wait_for_completion(&orig->pr_comp);
394 target_luns_data_has_changed(nacl, new, true);
395 kfree_rcu(orig, rcu_head);
399 rcu_assign_pointer(new->se_lun, lun);
400 rcu_assign_pointer(new->se_lun_acl, lun_acl);
401 hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist);
402 mutex_unlock(&nacl->lun_entry_mutex);
404 spin_lock(&lun->lun_deve_lock);
405 list_add_tail(&new->lun_link, &lun->lun_deve_list);
406 spin_unlock(&lun->lun_deve_lock);
408 target_luns_data_has_changed(nacl, new, true);
413 * Called with se_node_acl->lun_entry_mutex held.
415 void core_disable_device_list_for_node(
417 struct se_dev_entry *orig,
418 struct se_node_acl *nacl,
419 struct se_portal_group *tpg)
422 * rcu_dereference_raw protected by se_lun->lun_group symlink
423 * reference to se_device->dev_group.
425 struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev);
427 * If the MappedLUN entry is being disabled, the entry in
428 * lun->lun_deve_list must be removed now before clearing the
429 * struct se_dev_entry pointers below as logic in
430 * core_alua_do_transition_tg_pt() depends on these being present.
432 * deve->se_lun_acl will be NULL for demo-mode created LUNs
433 * that have not been explicitly converted to MappedLUNs ->
434 * struct se_lun_acl, but we remove deve->lun_link from
435 * lun->lun_deve_list. This also means that active UAs and
436 * NodeACL context specific PR metadata for demo-mode
437 * MappedLUN *deve will be released below..
439 spin_lock(&lun->lun_deve_lock);
440 list_del(&orig->lun_link);
441 spin_unlock(&lun->lun_deve_lock);
443 * Disable struct se_dev_entry LUN ACL mapping
445 core_scsi3_ua_release_all(orig);
447 hlist_del_rcu(&orig->link);
448 clear_bit(DEF_PR_REG_ACTIVE, &orig->deve_flags);
450 orig->creation_time = 0;
451 orig->attach_count--;
453 * Before firing off RCU callback, wait for any in process SPEC_I_PT=1
454 * or REGISTER_AND_MOVE PR operation to complete.
456 kref_put(&orig->pr_kref, target_pr_kref_release);
457 wait_for_completion(&orig->pr_comp);
459 rcu_assign_pointer(orig->se_lun, NULL);
460 rcu_assign_pointer(orig->se_lun_acl, NULL);
462 kfree_rcu(orig, rcu_head);
464 core_scsi3_free_pr_reg_from_nacl(dev, nacl);
465 target_luns_data_has_changed(nacl, NULL, false);
468 /* core_clear_lun_from_tpg():
472 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
474 struct se_node_acl *nacl;
475 struct se_dev_entry *deve;
477 mutex_lock(&tpg->acl_node_mutex);
478 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
480 mutex_lock(&nacl->lun_entry_mutex);
481 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) {
482 struct se_lun *tmp_lun = rcu_dereference_check(deve->se_lun,
483 lockdep_is_held(&nacl->lun_entry_mutex));
488 core_disable_device_list_for_node(lun, deve, nacl, tpg);
490 mutex_unlock(&nacl->lun_entry_mutex);
492 mutex_unlock(&tpg->acl_node_mutex);
495 int core_alloc_rtpi(struct se_lun *lun, struct se_device *dev)
499 spin_lock(&dev->se_port_lock);
500 if (dev->export_count == 0x0000ffff) {
501 pr_warn("Reached dev->dev_port_count =="
503 spin_unlock(&dev->se_port_lock);
508 * Allocate the next RELATIVE TARGET PORT IDENTIFIER for this struct se_device
509 * Here is the table from spc4r17 section 7.7.3.8.
511 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
515 * 1h Relative port 1, historically known as port A
516 * 2h Relative port 2, historically known as port B
517 * 3h to FFFFh Relative port 3 through 65 535
519 lun->lun_rtpi = dev->dev_rpti_counter++;
523 list_for_each_entry(tmp, &dev->dev_sep_list, lun_dev_link) {
525 * Make sure RELATIVE TARGET PORT IDENTIFIER is unique
528 if (lun->lun_rtpi == tmp->lun_rtpi)
531 spin_unlock(&dev->se_port_lock);
536 static void se_release_vpd_for_dev(struct se_device *dev)
538 struct t10_vpd *vpd, *vpd_tmp;
540 spin_lock(&dev->t10_wwn.t10_vpd_lock);
541 list_for_each_entry_safe(vpd, vpd_tmp,
542 &dev->t10_wwn.t10_vpd_list, vpd_list) {
543 list_del(&vpd->vpd_list);
546 spin_unlock(&dev->t10_wwn.t10_vpd_lock);
549 static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
551 u32 aligned_max_sectors;
554 * Limit max_sectors to a PAGE_SIZE aligned value for modern
555 * transport_allocate_data_tasks() operation.
557 alignment = max(1ul, PAGE_SIZE / block_size);
558 aligned_max_sectors = rounddown(max_sectors, alignment);
560 if (max_sectors != aligned_max_sectors)
561 pr_info("Rounding down aligned max_sectors from %u to %u\n",
562 max_sectors, aligned_max_sectors);
564 return aligned_max_sectors;
567 int core_dev_add_lun(
568 struct se_portal_group *tpg,
569 struct se_device *dev,
574 rc = core_tpg_add_lun(tpg, lun,
575 TRANSPORT_LUNFLAGS_READ_WRITE, dev);
579 pr_debug("%s_TPG[%u]_LUN[%llu] - Activated %s Logical Unit from"
580 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
581 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
582 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id);
584 * Update LUN maps for dynamically added initiators when
585 * generate_node_acl is enabled.
587 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
588 struct se_node_acl *acl;
590 mutex_lock(&tpg->acl_node_mutex);
591 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
592 if (acl->dynamic_node_acl &&
593 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
594 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
595 core_tpg_add_node_to_devs(acl, tpg, lun);
598 mutex_unlock(&tpg->acl_node_mutex);
604 /* core_dev_del_lun():
608 void core_dev_del_lun(
609 struct se_portal_group *tpg,
612 pr_debug("%s_TPG[%u]_LUN[%llu] - Deactivating %s Logical Unit from"
613 " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
614 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
615 tpg->se_tpg_tfo->get_fabric_name());
617 core_tpg_remove_lun(tpg, lun);
620 struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
621 struct se_portal_group *tpg,
622 struct se_node_acl *nacl,
626 struct se_lun_acl *lacl;
628 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) {
629 pr_err("%s InitiatorName exceeds maximum size.\n",
630 tpg->se_tpg_tfo->get_fabric_name());
634 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
636 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
641 lacl->mapped_lun = mapped_lun;
642 lacl->se_lun_nacl = nacl;
647 int core_dev_add_initiator_node_lun_acl(
648 struct se_portal_group *tpg,
649 struct se_lun_acl *lacl,
653 struct se_node_acl *nacl = lacl->se_lun_nacl;
655 * rcu_dereference_raw protected by se_lun->lun_group symlink
656 * reference to se_device->dev_group.
658 struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev);
663 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
664 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
665 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
669 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun,
670 lun_access, nacl, tpg) < 0)
673 pr_debug("%s_TPG[%hu]_LUN[%llu->%llu] - Added %s ACL for "
674 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
675 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, lacl->mapped_lun,
676 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
677 nacl->initiatorname);
679 * Check to see if there are any existing persistent reservation APTPL
680 * pre-registrations that need to be enabled for this LUN ACL..
682 core_scsi3_check_aptpl_registration(dev, tpg, lun, nacl,
687 int core_dev_del_initiator_node_lun_acl(
689 struct se_lun_acl *lacl)
691 struct se_portal_group *tpg = lun->lun_tpg;
692 struct se_node_acl *nacl;
693 struct se_dev_entry *deve;
695 nacl = lacl->se_lun_nacl;
699 mutex_lock(&nacl->lun_entry_mutex);
700 deve = target_nacl_find_deve(nacl, lacl->mapped_lun);
702 core_disable_device_list_for_node(lun, deve, nacl, tpg);
703 mutex_unlock(&nacl->lun_entry_mutex);
705 pr_debug("%s_TPG[%hu]_LUN[%llu] - Removed ACL for"
706 " InitiatorNode: %s Mapped LUN: %llu\n",
707 tpg->se_tpg_tfo->get_fabric_name(),
708 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
709 nacl->initiatorname, lacl->mapped_lun);
714 void core_dev_free_initiator_node_lun_acl(
715 struct se_portal_group *tpg,
716 struct se_lun_acl *lacl)
718 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
719 " Mapped LUN: %llu\n", tpg->se_tpg_tfo->get_fabric_name(),
720 tpg->se_tpg_tfo->tpg_get_tag(tpg),
721 tpg->se_tpg_tfo->get_fabric_name(),
722 lacl->se_lun_nacl->initiatorname, lacl->mapped_lun);
727 static void scsi_dump_inquiry(struct se_device *dev)
729 struct t10_wwn *wwn = &dev->t10_wwn;
733 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer
735 for (i = 0; i < 8; i++)
736 if (wwn->vendor[i] >= 0x20)
737 buf[i] = wwn->vendor[i];
741 pr_debug(" Vendor: %s\n", buf);
743 for (i = 0; i < 16; i++)
744 if (wwn->model[i] >= 0x20)
745 buf[i] = wwn->model[i];
749 pr_debug(" Model: %s\n", buf);
751 for (i = 0; i < 4; i++)
752 if (wwn->revision[i] >= 0x20)
753 buf[i] = wwn->revision[i];
757 pr_debug(" Revision: %s\n", buf);
759 device_type = dev->transport->get_device_type(dev);
760 pr_debug(" Type: %s ", scsi_device_type(device_type));
763 struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
765 struct se_device *dev;
766 struct se_lun *xcopy_lun;
768 dev = hba->backend->ops->alloc_device(hba, name);
772 dev->dev_link_magic = SE_DEV_LINK_MAGIC;
774 dev->transport = hba->backend->ops;
775 dev->prot_length = sizeof(struct t10_pi_tuple);
776 dev->hba_index = hba->hba_index;
778 INIT_LIST_HEAD(&dev->dev_list);
779 INIT_LIST_HEAD(&dev->dev_sep_list);
780 INIT_LIST_HEAD(&dev->dev_tmr_list);
781 INIT_LIST_HEAD(&dev->delayed_cmd_list);
782 INIT_LIST_HEAD(&dev->state_list);
783 INIT_LIST_HEAD(&dev->qf_cmd_list);
784 INIT_LIST_HEAD(&dev->g_dev_node);
785 spin_lock_init(&dev->execute_task_lock);
786 spin_lock_init(&dev->delayed_cmd_lock);
787 spin_lock_init(&dev->dev_reservation_lock);
788 spin_lock_init(&dev->se_port_lock);
789 spin_lock_init(&dev->se_tmr_lock);
790 spin_lock_init(&dev->qf_cmd_lock);
791 sema_init(&dev->caw_sem, 1);
792 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list);
793 spin_lock_init(&dev->t10_wwn.t10_vpd_lock);
794 INIT_LIST_HEAD(&dev->t10_pr.registration_list);
795 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list);
796 spin_lock_init(&dev->t10_pr.registration_lock);
797 spin_lock_init(&dev->t10_pr.aptpl_reg_lock);
798 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list);
799 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock);
800 INIT_LIST_HEAD(&dev->t10_alua.lba_map_list);
801 spin_lock_init(&dev->t10_alua.lba_map_lock);
803 dev->t10_wwn.t10_dev = dev;
804 dev->t10_alua.t10_dev = dev;
806 dev->dev_attrib.da_dev = dev;
807 dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS;
808 dev->dev_attrib.emulate_dpo = 1;
809 dev->dev_attrib.emulate_fua_write = 1;
810 dev->dev_attrib.emulate_fua_read = 1;
811 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
812 dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
813 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS;
814 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU;
815 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
816 dev->dev_attrib.emulate_caw = DA_EMULATE_CAW;
817 dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC;
818 dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT;
819 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
820 dev->dev_attrib.force_pr_aptpl = DA_FORCE_PR_APTPL;
821 dev->dev_attrib.is_nonrot = DA_IS_NONROT;
822 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
823 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
824 dev->dev_attrib.max_unmap_block_desc_count =
825 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
826 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
827 dev->dev_attrib.unmap_granularity_alignment =
828 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
829 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN;
831 xcopy_lun = &dev->xcopy_lun;
832 rcu_assign_pointer(xcopy_lun->lun_se_dev, dev);
833 init_completion(&xcopy_lun->lun_ref_comp);
834 init_completion(&xcopy_lun->lun_shutdown_comp);
835 INIT_LIST_HEAD(&xcopy_lun->lun_deve_list);
836 INIT_LIST_HEAD(&xcopy_lun->lun_dev_link);
837 mutex_init(&xcopy_lun->lun_tg_pt_md_mutex);
838 xcopy_lun->lun_tpg = &xcopy_pt_tpg;
844 * Check if the underlying struct block_device request_queue supports
845 * the QUEUE_FLAG_DISCARD bit for UNMAP/WRITE_SAME in SCSI + TRIM
846 * in ATA and we need to set TPE=1
848 bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib,
849 struct request_queue *q)
851 int block_size = queue_logical_block_size(q);
853 if (!blk_queue_discard(q))
856 attrib->max_unmap_lba_count =
857 q->limits.max_discard_sectors >> (ilog2(block_size) - 9);
859 * Currently hardcoded to 1 in Linux/SCSI code..
861 attrib->max_unmap_block_desc_count = 1;
862 attrib->unmap_granularity = q->limits.discard_granularity / block_size;
863 attrib->unmap_granularity_alignment = q->limits.discard_alignment /
867 EXPORT_SYMBOL(target_configure_unmap_from_queue);
870 * Convert from blocksize advertised to the initiator to the 512 byte
871 * units unconditionally used by the Linux block layer.
873 sector_t target_to_linux_sector(struct se_device *dev, sector_t lb)
875 switch (dev->dev_attrib.block_size) {
886 EXPORT_SYMBOL(target_to_linux_sector);
888 int target_configure_device(struct se_device *dev)
890 struct se_hba *hba = dev->se_hba;
893 if (dev->dev_flags & DF_CONFIGURED) {
894 pr_err("se_dev->se_dev_ptr already set for storage"
899 ret = dev->transport->configure_device(dev);
903 * XXX: there is not much point to have two different values here..
905 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size;
906 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth;
909 * Align max_hw_sectors down to PAGE_SIZE I/O transfers
911 dev->dev_attrib.hw_max_sectors =
912 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors,
913 dev->dev_attrib.hw_block_size);
914 dev->dev_attrib.optimal_sectors = dev->dev_attrib.hw_max_sectors;
916 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX);
917 dev->creation_time = get_jiffies_64();
919 ret = core_setup_alua(dev);
924 * Startup the struct se_device processing thread
926 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1,
927 dev->transport->name);
929 pr_err("Unable to create tmr workqueue for %s\n",
930 dev->transport->name);
936 * Setup work_queue for QUEUE_FULL
938 INIT_WORK(&dev->qf_work_queue, target_qf_do_work);
941 * Preload the initial INQUIRY const values if we are doing
942 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI
943 * passthrough because this is being provided by the backend LLD.
945 if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)) {
946 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8);
947 strncpy(&dev->t10_wwn.model[0],
948 dev->transport->inquiry_prod, 16);
949 strncpy(&dev->t10_wwn.revision[0],
950 dev->transport->inquiry_rev, 4);
953 scsi_dump_inquiry(dev);
955 spin_lock(&hba->device_lock);
957 spin_unlock(&hba->device_lock);
959 mutex_lock(&g_device_mutex);
960 list_add_tail(&dev->g_dev_node, &g_device_list);
961 mutex_unlock(&g_device_mutex);
963 dev->dev_flags |= DF_CONFIGURED;
968 core_alua_free_lu_gp_mem(dev);
970 se_release_vpd_for_dev(dev);
974 void target_free_device(struct se_device *dev)
976 struct se_hba *hba = dev->se_hba;
978 WARN_ON(!list_empty(&dev->dev_sep_list));
980 if (dev->dev_flags & DF_CONFIGURED) {
981 destroy_workqueue(dev->tmr_wq);
983 mutex_lock(&g_device_mutex);
984 list_del(&dev->g_dev_node);
985 mutex_unlock(&g_device_mutex);
987 spin_lock(&hba->device_lock);
989 spin_unlock(&hba->device_lock);
992 core_alua_free_lu_gp_mem(dev);
993 core_alua_set_lba_map(dev, NULL, 0, 0);
994 core_scsi3_free_all_registrations(dev);
995 se_release_vpd_for_dev(dev);
997 if (dev->transport->free_prot)
998 dev->transport->free_prot(dev);
1000 dev->transport->free_device(dev);
1003 int core_dev_setup_virtual_lun0(void)
1006 struct se_device *dev;
1007 char buf[] = "rd_pages=8,rd_nullio=1";
1010 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
1012 return PTR_ERR(hba);
1014 dev = target_alloc_device(hba, "virt_lun0");
1020 hba->backend->ops->set_configfs_dev_params(dev, buf, sizeof(buf));
1022 ret = target_configure_device(dev);
1024 goto out_free_se_dev;
1031 target_free_device(dev);
1033 core_delete_hba(hba);
1038 void core_dev_release_virtual_lun0(void)
1040 struct se_hba *hba = lun0_hba;
1046 target_free_device(g_lun0_dev);
1047 core_delete_hba(hba);
1051 * Common CDB parsing for kernel and user passthrough.
1054 passthrough_parse_cdb(struct se_cmd *cmd,
1055 sense_reason_t (*exec_cmd)(struct se_cmd *cmd))
1057 unsigned char *cdb = cmd->t_task_cdb;
1060 * For REPORT LUNS we always need to emulate the response, for everything
1063 if (cdb[0] == REPORT_LUNS) {
1064 cmd->execute_cmd = spc_emulate_report_luns;
1065 return TCM_NO_SENSE;
1068 /* Set DATA_CDB flag for ops that should have it */
1079 case WRITE_VERIFY_12:
1080 case 0x8e: /* WRITE_VERIFY_16 */
1081 case COMPARE_AND_WRITE:
1082 case XDWRITEREAD_10:
1083 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1085 case VARIABLE_LENGTH_CMD:
1086 switch (get_unaligned_be16(&cdb[8])) {
1089 case 0x0c: /* WRITE_VERIFY_32 */
1090 case XDWRITEREAD_32:
1091 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1096 cmd->execute_cmd = exec_cmd;
1098 return TCM_NO_SENSE;
1100 EXPORT_SYMBOL(passthrough_parse_cdb);