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);
80 se_cmd->se_lun = rcu_dereference(deve->se_lun);
81 se_cmd->pr_res_key = deve->pr_res_key;
82 se_cmd->orig_fe_lun = unpacked_lun;
83 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
85 percpu_ref_get(&se_lun->lun_ref);
86 se_cmd->lun_ref_active = true;
88 if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
89 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
90 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
91 " Access for 0x%08llx\n",
92 se_cmd->se_tfo->get_fabric_name(),
95 ret = TCM_WRITE_PROTECTED;
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%08llx\n",
110 se_cmd->se_tfo->get_fabric_name(),
112 return TCM_NON_EXISTENT_LUN;
115 se_lun = se_sess->se_tpg->tpg_virt_lun0;
116 se_cmd->se_lun = se_sess->se_tpg->tpg_virt_lun0;
117 se_cmd->orig_fe_lun = 0;
118 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
120 percpu_ref_get(&se_lun->lun_ref);
121 se_cmd->lun_ref_active = true;
124 * Force WRITE PROTECT for virtual LUN 0
126 if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
127 (se_cmd->data_direction != DMA_NONE)) {
128 ret = TCM_WRITE_PROTECTED;
133 * RCU reference protected by percpu se_lun->lun_ref taken above that
134 * must drop to zero (including initial reference) before this se_lun
135 * pointer can be kfree_rcu() by the final se_lun->lun_group put via
136 * target_core_fabric_configfs.c:target_fabric_port_release
139 se_cmd->se_dev = rcu_dereference_raw(se_lun->lun_se_dev);
140 atomic_long_inc(&se_cmd->se_dev->num_cmds);
142 if (se_cmd->data_direction == DMA_TO_DEVICE)
143 atomic_long_add(se_cmd->data_length,
144 &se_cmd->se_dev->write_bytes);
145 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
146 atomic_long_add(se_cmd->data_length,
147 &se_cmd->se_dev->read_bytes);
151 EXPORT_SYMBOL(transport_lookup_cmd_lun);
153 int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u64 unpacked_lun)
155 struct se_dev_entry *deve;
156 struct se_lun *se_lun = NULL;
157 struct se_session *se_sess = se_cmd->se_sess;
158 struct se_node_acl *nacl = se_sess->se_node_acl;
159 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
163 deve = target_nacl_find_deve(nacl, unpacked_lun);
165 se_tmr->tmr_lun = rcu_dereference(deve->se_lun);
166 se_cmd->se_lun = rcu_dereference(deve->se_lun);
167 se_lun = rcu_dereference(deve->se_lun);
168 se_cmd->pr_res_key = deve->pr_res_key;
169 se_cmd->orig_fe_lun = unpacked_lun;
174 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
175 " Access for 0x%08llx\n",
176 se_cmd->se_tfo->get_fabric_name(),
181 * XXX: Add percpu se_lun->lun_ref reference count for TMR
183 se_cmd->se_dev = rcu_dereference_raw(se_lun->lun_se_dev);
184 se_tmr->tmr_dev = rcu_dereference_raw(se_lun->lun_se_dev);
186 spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags);
187 list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list);
188 spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags);
192 EXPORT_SYMBOL(transport_lookup_tmr_lun);
194 bool target_lun_is_rdonly(struct se_cmd *cmd)
196 struct se_session *se_sess = cmd->se_sess;
197 struct se_dev_entry *deve;
201 deve = target_nacl_find_deve(se_sess->se_node_acl, cmd->orig_fe_lun);
202 ret = (deve && deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY);
207 EXPORT_SYMBOL(target_lun_is_rdonly);
210 * This function is called from core_scsi3_emulate_pro_register_and_move()
211 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_kref
212 * when a matching rtpi is found.
214 struct se_dev_entry *core_get_se_deve_from_rtpi(
215 struct se_node_acl *nacl,
218 struct se_dev_entry *deve;
220 struct se_portal_group *tpg = nacl->se_tpg;
223 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) {
224 lun = rcu_dereference(deve->se_lun);
226 pr_err("%s device entries device pointer is"
227 " NULL, but Initiator has access.\n",
228 tpg->se_tpg_tfo->get_fabric_name());
231 if (lun->lun_rtpi != rtpi)
234 kref_get(&deve->pr_kref);
244 void core_free_device_list_for_node(
245 struct se_node_acl *nacl,
246 struct se_portal_group *tpg)
248 struct se_dev_entry *deve;
250 mutex_lock(&nacl->lun_entry_mutex);
251 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) {
252 struct se_lun *lun = rcu_dereference_check(deve->se_lun,
253 lockdep_is_held(&nacl->lun_entry_mutex));
254 core_disable_device_list_for_node(lun, deve, nacl, tpg);
256 mutex_unlock(&nacl->lun_entry_mutex);
259 void core_update_device_list_access(
262 struct se_node_acl *nacl)
264 struct se_dev_entry *deve;
266 mutex_lock(&nacl->lun_entry_mutex);
267 deve = target_nacl_find_deve(nacl, mapped_lun);
269 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
270 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
271 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
273 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
274 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
277 mutex_unlock(&nacl->lun_entry_mutex);
281 * Called with rcu_read_lock or nacl->device_list_lock held.
283 struct se_dev_entry *target_nacl_find_deve(struct se_node_acl *nacl, u64 mapped_lun)
285 struct se_dev_entry *deve;
287 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link)
288 if (deve->mapped_lun == mapped_lun)
293 EXPORT_SYMBOL(target_nacl_find_deve);
295 void target_pr_kref_release(struct kref *kref)
297 struct se_dev_entry *deve = container_of(kref, struct se_dev_entry,
299 complete(&deve->pr_comp);
303 target_luns_data_has_changed(struct se_node_acl *nacl, struct se_dev_entry *new,
306 struct se_dev_entry *tmp;
309 hlist_for_each_entry_rcu(tmp, &nacl->lun_entry_hlist, link) {
310 if (skip_new && tmp == new)
312 core_scsi3_ua_allocate(tmp, 0x3F,
313 ASCQ_3FH_REPORTED_LUNS_DATA_HAS_CHANGED);
318 int core_enable_device_list_for_node(
320 struct se_lun_acl *lun_acl,
323 struct se_node_acl *nacl,
324 struct se_portal_group *tpg)
326 struct se_dev_entry *orig, *new;
328 new = kzalloc(sizeof(*new), GFP_KERNEL);
330 pr_err("Unable to allocate se_dev_entry memory\n");
334 atomic_set(&new->ua_count, 0);
335 spin_lock_init(&new->ua_lock);
336 INIT_LIST_HEAD(&new->ua_list);
337 INIT_LIST_HEAD(&new->lun_link);
339 new->mapped_lun = mapped_lun;
340 kref_init(&new->pr_kref);
341 init_completion(&new->pr_comp);
343 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)
344 new->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
346 new->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
348 new->creation_time = get_jiffies_64();
351 mutex_lock(&nacl->lun_entry_mutex);
352 orig = target_nacl_find_deve(nacl, mapped_lun);
353 if (orig && orig->se_lun) {
354 struct se_lun *orig_lun = rcu_dereference_check(orig->se_lun,
355 lockdep_is_held(&nacl->lun_entry_mutex));
357 if (orig_lun != lun) {
358 pr_err("Existing orig->se_lun doesn't match new lun"
359 " for dynamic -> explicit NodeACL conversion:"
360 " %s\n", nacl->initiatorname);
361 mutex_unlock(&nacl->lun_entry_mutex);
365 if (orig->se_lun_acl != NULL) {
366 pr_warn_ratelimited("Detected existing explicit"
367 " se_lun_acl->se_lun_group reference for %s"
368 " mapped_lun: %llu, failing\n",
369 nacl->initiatorname, mapped_lun);
370 mutex_unlock(&nacl->lun_entry_mutex);
375 rcu_assign_pointer(new->se_lun, lun);
376 rcu_assign_pointer(new->se_lun_acl, lun_acl);
377 hlist_del_rcu(&orig->link);
378 hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist);
379 mutex_unlock(&nacl->lun_entry_mutex);
381 spin_lock(&lun->lun_deve_lock);
382 list_del(&orig->lun_link);
383 list_add_tail(&new->lun_link, &lun->lun_deve_list);
384 spin_unlock(&lun->lun_deve_lock);
386 kref_put(&orig->pr_kref, target_pr_kref_release);
387 wait_for_completion(&orig->pr_comp);
389 target_luns_data_has_changed(nacl, new, true);
390 kfree_rcu(orig, rcu_head);
394 rcu_assign_pointer(new->se_lun, lun);
395 rcu_assign_pointer(new->se_lun_acl, lun_acl);
396 hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist);
397 mutex_unlock(&nacl->lun_entry_mutex);
399 spin_lock(&lun->lun_deve_lock);
400 list_add_tail(&new->lun_link, &lun->lun_deve_list);
401 spin_unlock(&lun->lun_deve_lock);
403 target_luns_data_has_changed(nacl, new, true);
408 * Called with se_node_acl->lun_entry_mutex held.
410 void core_disable_device_list_for_node(
412 struct se_dev_entry *orig,
413 struct se_node_acl *nacl,
414 struct se_portal_group *tpg)
417 * rcu_dereference_raw protected by se_lun->lun_group symlink
418 * reference to se_device->dev_group.
420 struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev);
422 * If the MappedLUN entry is being disabled, the entry in
423 * lun->lun_deve_list must be removed now before clearing the
424 * struct se_dev_entry pointers below as logic in
425 * core_alua_do_transition_tg_pt() depends on these being present.
427 * deve->se_lun_acl will be NULL for demo-mode created LUNs
428 * that have not been explicitly converted to MappedLUNs ->
429 * struct se_lun_acl, but we remove deve->lun_link from
430 * lun->lun_deve_list. This also means that active UAs and
431 * NodeACL context specific PR metadata for demo-mode
432 * MappedLUN *deve will be released below..
434 spin_lock(&lun->lun_deve_lock);
435 list_del(&orig->lun_link);
436 spin_unlock(&lun->lun_deve_lock);
438 * Disable struct se_dev_entry LUN ACL mapping
440 core_scsi3_ua_release_all(orig);
442 hlist_del_rcu(&orig->link);
443 clear_bit(DEF_PR_REG_ACTIVE, &orig->deve_flags);
445 orig->creation_time = 0;
446 orig->attach_count--;
448 * Before firing off RCU callback, wait for any in process SPEC_I_PT=1
449 * or REGISTER_AND_MOVE PR operation to complete.
451 kref_put(&orig->pr_kref, target_pr_kref_release);
452 wait_for_completion(&orig->pr_comp);
454 rcu_assign_pointer(orig->se_lun, NULL);
455 rcu_assign_pointer(orig->se_lun_acl, NULL);
457 kfree_rcu(orig, rcu_head);
459 core_scsi3_free_pr_reg_from_nacl(dev, nacl);
460 target_luns_data_has_changed(nacl, NULL, false);
463 /* core_clear_lun_from_tpg():
467 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
469 struct se_node_acl *nacl;
470 struct se_dev_entry *deve;
472 mutex_lock(&tpg->acl_node_mutex);
473 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
475 mutex_lock(&nacl->lun_entry_mutex);
476 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) {
477 struct se_lun *tmp_lun = rcu_dereference_check(deve->se_lun,
478 lockdep_is_held(&nacl->lun_entry_mutex));
483 core_disable_device_list_for_node(lun, deve, nacl, tpg);
485 mutex_unlock(&nacl->lun_entry_mutex);
487 mutex_unlock(&tpg->acl_node_mutex);
490 int core_alloc_rtpi(struct se_lun *lun, struct se_device *dev)
494 spin_lock(&dev->se_port_lock);
495 if (dev->export_count == 0x0000ffff) {
496 pr_warn("Reached dev->dev_port_count =="
498 spin_unlock(&dev->se_port_lock);
503 * Allocate the next RELATIVE TARGET PORT IDENTIFIER for this struct se_device
504 * Here is the table from spc4r17 section 7.7.3.8.
506 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
510 * 1h Relative port 1, historically known as port A
511 * 2h Relative port 2, historically known as port B
512 * 3h to FFFFh Relative port 3 through 65 535
514 lun->lun_rtpi = dev->dev_rpti_counter++;
518 list_for_each_entry(tmp, &dev->dev_sep_list, lun_dev_link) {
520 * Make sure RELATIVE TARGET PORT IDENTIFIER is unique
523 if (lun->lun_rtpi == tmp->lun_rtpi)
526 spin_unlock(&dev->se_port_lock);
531 static void se_release_vpd_for_dev(struct se_device *dev)
533 struct t10_vpd *vpd, *vpd_tmp;
535 spin_lock(&dev->t10_wwn.t10_vpd_lock);
536 list_for_each_entry_safe(vpd, vpd_tmp,
537 &dev->t10_wwn.t10_vpd_list, vpd_list) {
538 list_del(&vpd->vpd_list);
541 spin_unlock(&dev->t10_wwn.t10_vpd_lock);
544 static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
546 u32 aligned_max_sectors;
549 * Limit max_sectors to a PAGE_SIZE aligned value for modern
550 * transport_allocate_data_tasks() operation.
552 alignment = max(1ul, PAGE_SIZE / block_size);
553 aligned_max_sectors = rounddown(max_sectors, alignment);
555 if (max_sectors != aligned_max_sectors)
556 pr_info("Rounding down aligned max_sectors from %u to %u\n",
557 max_sectors, aligned_max_sectors);
559 return aligned_max_sectors;
562 int core_dev_add_lun(
563 struct se_portal_group *tpg,
564 struct se_device *dev,
569 rc = core_tpg_add_lun(tpg, lun,
570 TRANSPORT_LUNFLAGS_READ_WRITE, dev);
574 pr_debug("%s_TPG[%u]_LUN[%llu] - Activated %s Logical Unit from"
575 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
576 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
577 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id);
579 * Update LUN maps for dynamically added initiators when
580 * generate_node_acl is enabled.
582 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
583 struct se_node_acl *acl;
585 mutex_lock(&tpg->acl_node_mutex);
586 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
587 if (acl->dynamic_node_acl &&
588 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
589 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
590 core_tpg_add_node_to_devs(acl, tpg, lun);
593 mutex_unlock(&tpg->acl_node_mutex);
599 /* core_dev_del_lun():
603 void core_dev_del_lun(
604 struct se_portal_group *tpg,
607 pr_debug("%s_TPG[%u]_LUN[%llu] - Deactivating %s Logical Unit from"
608 " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
609 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
610 tpg->se_tpg_tfo->get_fabric_name());
612 core_tpg_remove_lun(tpg, lun);
615 struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
616 struct se_portal_group *tpg,
617 struct se_node_acl *nacl,
621 struct se_lun_acl *lacl;
623 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) {
624 pr_err("%s InitiatorName exceeds maximum size.\n",
625 tpg->se_tpg_tfo->get_fabric_name());
629 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
631 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
636 lacl->mapped_lun = mapped_lun;
637 lacl->se_lun_nacl = nacl;
642 int core_dev_add_initiator_node_lun_acl(
643 struct se_portal_group *tpg,
644 struct se_lun_acl *lacl,
648 struct se_node_acl *nacl = lacl->se_lun_nacl;
650 * rcu_dereference_raw protected by se_lun->lun_group symlink
651 * reference to se_device->dev_group.
653 struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev);
658 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
659 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
660 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
664 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun,
665 lun_access, nacl, tpg) < 0)
668 pr_debug("%s_TPG[%hu]_LUN[%llu->%llu] - Added %s ACL for "
669 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
670 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, lacl->mapped_lun,
671 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
672 nacl->initiatorname);
674 * Check to see if there are any existing persistent reservation APTPL
675 * pre-registrations that need to be enabled for this LUN ACL..
677 core_scsi3_check_aptpl_registration(dev, tpg, lun, nacl,
682 int core_dev_del_initiator_node_lun_acl(
684 struct se_lun_acl *lacl)
686 struct se_portal_group *tpg = lun->lun_tpg;
687 struct se_node_acl *nacl;
688 struct se_dev_entry *deve;
690 nacl = lacl->se_lun_nacl;
694 mutex_lock(&nacl->lun_entry_mutex);
695 deve = target_nacl_find_deve(nacl, lacl->mapped_lun);
697 core_disable_device_list_for_node(lun, deve, nacl, tpg);
698 mutex_unlock(&nacl->lun_entry_mutex);
700 pr_debug("%s_TPG[%hu]_LUN[%llu] - Removed ACL for"
701 " InitiatorNode: %s Mapped LUN: %llu\n",
702 tpg->se_tpg_tfo->get_fabric_name(),
703 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
704 nacl->initiatorname, lacl->mapped_lun);
709 void core_dev_free_initiator_node_lun_acl(
710 struct se_portal_group *tpg,
711 struct se_lun_acl *lacl)
713 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
714 " Mapped LUN: %llu\n", tpg->se_tpg_tfo->get_fabric_name(),
715 tpg->se_tpg_tfo->tpg_get_tag(tpg),
716 tpg->se_tpg_tfo->get_fabric_name(),
717 lacl->se_lun_nacl->initiatorname, lacl->mapped_lun);
722 static void scsi_dump_inquiry(struct se_device *dev)
724 struct t10_wwn *wwn = &dev->t10_wwn;
728 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer
730 for (i = 0; i < 8; i++)
731 if (wwn->vendor[i] >= 0x20)
732 buf[i] = wwn->vendor[i];
736 pr_debug(" Vendor: %s\n", buf);
738 for (i = 0; i < 16; i++)
739 if (wwn->model[i] >= 0x20)
740 buf[i] = wwn->model[i];
744 pr_debug(" Model: %s\n", buf);
746 for (i = 0; i < 4; i++)
747 if (wwn->revision[i] >= 0x20)
748 buf[i] = wwn->revision[i];
752 pr_debug(" Revision: %s\n", buf);
754 device_type = dev->transport->get_device_type(dev);
755 pr_debug(" Type: %s ", scsi_device_type(device_type));
758 struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
760 struct se_device *dev;
761 struct se_lun *xcopy_lun;
763 dev = hba->backend->ops->alloc_device(hba, name);
767 dev->dev_link_magic = SE_DEV_LINK_MAGIC;
769 dev->transport = hba->backend->ops;
770 dev->prot_length = sizeof(struct t10_pi_tuple);
771 dev->hba_index = hba->hba_index;
773 INIT_LIST_HEAD(&dev->dev_list);
774 INIT_LIST_HEAD(&dev->dev_sep_list);
775 INIT_LIST_HEAD(&dev->dev_tmr_list);
776 INIT_LIST_HEAD(&dev->delayed_cmd_list);
777 INIT_LIST_HEAD(&dev->state_list);
778 INIT_LIST_HEAD(&dev->qf_cmd_list);
779 INIT_LIST_HEAD(&dev->g_dev_node);
780 spin_lock_init(&dev->execute_task_lock);
781 spin_lock_init(&dev->delayed_cmd_lock);
782 spin_lock_init(&dev->dev_reservation_lock);
783 spin_lock_init(&dev->se_port_lock);
784 spin_lock_init(&dev->se_tmr_lock);
785 spin_lock_init(&dev->qf_cmd_lock);
786 sema_init(&dev->caw_sem, 1);
787 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list);
788 spin_lock_init(&dev->t10_wwn.t10_vpd_lock);
789 INIT_LIST_HEAD(&dev->t10_pr.registration_list);
790 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list);
791 spin_lock_init(&dev->t10_pr.registration_lock);
792 spin_lock_init(&dev->t10_pr.aptpl_reg_lock);
793 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list);
794 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock);
795 INIT_LIST_HEAD(&dev->t10_alua.lba_map_list);
796 spin_lock_init(&dev->t10_alua.lba_map_lock);
798 dev->t10_wwn.t10_dev = dev;
799 dev->t10_alua.t10_dev = dev;
801 dev->dev_attrib.da_dev = dev;
802 dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS;
803 dev->dev_attrib.emulate_dpo = 1;
804 dev->dev_attrib.emulate_fua_write = 1;
805 dev->dev_attrib.emulate_fua_read = 1;
806 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
807 dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
808 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS;
809 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU;
810 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
811 dev->dev_attrib.emulate_caw = DA_EMULATE_CAW;
812 dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC;
813 dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT;
814 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
815 dev->dev_attrib.force_pr_aptpl = DA_FORCE_PR_APTPL;
816 dev->dev_attrib.is_nonrot = DA_IS_NONROT;
817 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
818 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
819 dev->dev_attrib.max_unmap_block_desc_count =
820 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
821 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
822 dev->dev_attrib.unmap_granularity_alignment =
823 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
824 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN;
826 xcopy_lun = &dev->xcopy_lun;
827 rcu_assign_pointer(xcopy_lun->lun_se_dev, dev);
828 init_completion(&xcopy_lun->lun_ref_comp);
829 INIT_LIST_HEAD(&xcopy_lun->lun_deve_list);
830 INIT_LIST_HEAD(&xcopy_lun->lun_dev_link);
831 mutex_init(&xcopy_lun->lun_tg_pt_md_mutex);
832 xcopy_lun->lun_tpg = &xcopy_pt_tpg;
838 * Check if the underlying struct block_device request_queue supports
839 * the QUEUE_FLAG_DISCARD bit for UNMAP/WRITE_SAME in SCSI + TRIM
840 * in ATA and we need to set TPE=1
842 bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib,
843 struct request_queue *q)
845 int block_size = queue_logical_block_size(q);
847 if (!blk_queue_discard(q))
850 attrib->max_unmap_lba_count =
851 q->limits.max_discard_sectors >> (ilog2(block_size) - 9);
853 * Currently hardcoded to 1 in Linux/SCSI code..
855 attrib->max_unmap_block_desc_count = 1;
856 attrib->unmap_granularity = q->limits.discard_granularity / block_size;
857 attrib->unmap_granularity_alignment = q->limits.discard_alignment /
861 EXPORT_SYMBOL(target_configure_unmap_from_queue);
864 * Convert from blocksize advertised to the initiator to the 512 byte
865 * units unconditionally used by the Linux block layer.
867 sector_t target_to_linux_sector(struct se_device *dev, sector_t lb)
869 switch (dev->dev_attrib.block_size) {
880 EXPORT_SYMBOL(target_to_linux_sector);
882 int target_configure_device(struct se_device *dev)
884 struct se_hba *hba = dev->se_hba;
887 if (dev->dev_flags & DF_CONFIGURED) {
888 pr_err("se_dev->se_dev_ptr already set for storage"
893 ret = dev->transport->configure_device(dev);
897 * XXX: there is not much point to have two different values here..
899 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size;
900 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth;
903 * Align max_hw_sectors down to PAGE_SIZE I/O transfers
905 dev->dev_attrib.hw_max_sectors =
906 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors,
907 dev->dev_attrib.hw_block_size);
908 dev->dev_attrib.optimal_sectors = dev->dev_attrib.hw_max_sectors;
910 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX);
911 dev->creation_time = get_jiffies_64();
913 ret = core_setup_alua(dev);
918 * Startup the struct se_device processing thread
920 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1,
921 dev->transport->name);
923 pr_err("Unable to create tmr workqueue for %s\n",
924 dev->transport->name);
930 * Setup work_queue for QUEUE_FULL
932 INIT_WORK(&dev->qf_work_queue, target_qf_do_work);
935 * Preload the initial INQUIRY const values if we are doing
936 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI
937 * passthrough because this is being provided by the backend LLD.
939 if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)) {
940 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8);
941 strncpy(&dev->t10_wwn.model[0],
942 dev->transport->inquiry_prod, 16);
943 strncpy(&dev->t10_wwn.revision[0],
944 dev->transport->inquiry_rev, 4);
947 scsi_dump_inquiry(dev);
949 spin_lock(&hba->device_lock);
951 spin_unlock(&hba->device_lock);
953 mutex_lock(&g_device_mutex);
954 list_add_tail(&dev->g_dev_node, &g_device_list);
955 mutex_unlock(&g_device_mutex);
957 dev->dev_flags |= DF_CONFIGURED;
962 core_alua_free_lu_gp_mem(dev);
964 se_release_vpd_for_dev(dev);
968 void target_free_device(struct se_device *dev)
970 struct se_hba *hba = dev->se_hba;
972 WARN_ON(!list_empty(&dev->dev_sep_list));
974 if (dev->dev_flags & DF_CONFIGURED) {
975 destroy_workqueue(dev->tmr_wq);
977 mutex_lock(&g_device_mutex);
978 list_del(&dev->g_dev_node);
979 mutex_unlock(&g_device_mutex);
981 spin_lock(&hba->device_lock);
983 spin_unlock(&hba->device_lock);
986 core_alua_free_lu_gp_mem(dev);
987 core_alua_set_lba_map(dev, NULL, 0, 0);
988 core_scsi3_free_all_registrations(dev);
989 se_release_vpd_for_dev(dev);
991 if (dev->transport->free_prot)
992 dev->transport->free_prot(dev);
994 dev->transport->free_device(dev);
997 int core_dev_setup_virtual_lun0(void)
1000 struct se_device *dev;
1001 char buf[] = "rd_pages=8,rd_nullio=1";
1004 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
1006 return PTR_ERR(hba);
1008 dev = target_alloc_device(hba, "virt_lun0");
1014 hba->backend->ops->set_configfs_dev_params(dev, buf, sizeof(buf));
1016 ret = target_configure_device(dev);
1018 goto out_free_se_dev;
1025 target_free_device(dev);
1027 core_delete_hba(hba);
1032 void core_dev_release_virtual_lun0(void)
1034 struct se_hba *hba = lun0_hba;
1040 target_free_device(g_lun0_dev);
1041 core_delete_hba(hba);
1045 * Common CDB parsing for kernel and user passthrough.
1048 passthrough_parse_cdb(struct se_cmd *cmd,
1049 sense_reason_t (*exec_cmd)(struct se_cmd *cmd))
1051 unsigned char *cdb = cmd->t_task_cdb;
1054 * Clear a lun set in the cdb if the initiator talking to use spoke
1055 * and old standards version, as we can't assume the underlying device
1056 * won't choke up on it.
1059 case READ_10: /* SBC - RDProtect */
1060 case READ_12: /* SBC - RDProtect */
1061 case READ_16: /* SBC - RDProtect */
1062 case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */
1063 case VERIFY: /* SBC - VRProtect */
1064 case VERIFY_16: /* SBC - VRProtect */
1065 case WRITE_VERIFY: /* SBC - VRProtect */
1066 case WRITE_VERIFY_12: /* SBC - VRProtect */
1067 case MAINTENANCE_IN: /* SPC - Parameter Data Format for SA RTPG */
1070 cdb[1] &= 0x1f; /* clear logical unit number */
1075 * For REPORT LUNS we always need to emulate the response, for everything
1078 if (cdb[0] == REPORT_LUNS) {
1079 cmd->execute_cmd = spc_emulate_report_luns;
1080 return TCM_NO_SENSE;
1083 /* Set DATA_CDB flag for ops that should have it */
1094 case WRITE_VERIFY_12:
1095 case 0x8e: /* WRITE_VERIFY_16 */
1096 case COMPARE_AND_WRITE:
1097 case XDWRITEREAD_10:
1098 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1100 case VARIABLE_LENGTH_CMD:
1101 switch (get_unaligned_be16(&cdb[8])) {
1104 case 0x0c: /* WRITE_VERIFY_32 */
1105 case XDWRITEREAD_32:
1106 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1111 cmd->execute_cmd = exec_cmd;
1113 return TCM_NO_SENSE;
1115 EXPORT_SYMBOL(passthrough_parse_cdb);