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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>
34#include <linux/in.h>
35#include <linux/export.h>
36#include <asm/unaligned.h>
37#include <net/sock.h>
38#include <net/tcp.h>
39#include <scsi/scsi_common.h>
40#include <scsi/scsi_proto.h>
41
42#include <target/target_core_base.h>
43#include <target/target_core_backend.h>
44#include <target/target_core_fabric.h>
45
46#include "target_core_internal.h"
47#include "target_core_alua.h"
48#include "target_core_pr.h"
49#include "target_core_ua.h"
50
51DEFINE_MUTEX(g_device_mutex);
52LIST_HEAD(g_device_list);
53
54static struct se_hba *lun0_hba;
55
56struct se_device *g_lun0_dev;
57
58sense_reason_t
59transport_lookup_cmd_lun(struct se_cmd *se_cmd, u64 unpacked_lun)
60{
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;
66
67 rcu_read_lock();
68 deve = target_nacl_find_deve(nacl, unpacked_lun);
69 if (deve) {
70 atomic_long_inc(&deve->total_cmds);
71
72 if (se_cmd->data_direction == DMA_TO_DEVICE)
73 atomic_long_add(se_cmd->data_length,
74 &deve->write_bytes);
75 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
76 atomic_long_add(se_cmd->data_length,
77 &deve->read_bytes);
78
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;
84
85 percpu_ref_get(&se_lun->lun_ref);
86 se_cmd->lun_ref_active = true;
87
88 if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
89 deve->lun_access_ro) {
90 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
91 " Access for 0x%08llx\n",
92 se_cmd->se_tfo->get_fabric_name(),
93 unpacked_lun);
94 rcu_read_unlock();
95 ret = TCM_WRITE_PROTECTED;
96 goto ref_dev;
97 }
98 }
99 rcu_read_unlock();
100
101 if (!se_lun) {
102
103
104
105
106
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(),
111 unpacked_lun);
112 return TCM_NON_EXISTENT_LUN;
113 }
114
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;
119
120 percpu_ref_get(&se_lun->lun_ref);
121 se_cmd->lun_ref_active = true;
122
123
124
125
126 if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
127 (se_cmd->data_direction != DMA_NONE)) {
128 ret = TCM_WRITE_PROTECTED;
129 goto ref_dev;
130 }
131 }
132
133
134
135
136
137
138ref_dev:
139 se_cmd->se_dev = rcu_dereference_raw(se_lun->lun_se_dev);
140 atomic_long_inc(&se_cmd->se_dev->num_cmds);
141
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);
148
149 return ret;
150}
151EXPORT_SYMBOL(transport_lookup_cmd_lun);
152
153int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u64 unpacked_lun)
154{
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;
160 unsigned long flags;
161
162 rcu_read_lock();
163 deve = target_nacl_find_deve(nacl, unpacked_lun);
164 if (deve) {
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;
170 }
171 rcu_read_unlock();
172
173 if (!se_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(),
177 unpacked_lun);
178 return -ENODEV;
179 }
180
181
182
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);
185
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);
189
190 return 0;
191}
192EXPORT_SYMBOL(transport_lookup_tmr_lun);
193
194bool target_lun_is_rdonly(struct se_cmd *cmd)
195{
196 struct se_session *se_sess = cmd->se_sess;
197 struct se_dev_entry *deve;
198 bool ret;
199
200 rcu_read_lock();
201 deve = target_nacl_find_deve(se_sess->se_node_acl, cmd->orig_fe_lun);
202 ret = deve && deve->lun_access_ro;
203 rcu_read_unlock();
204
205 return ret;
206}
207EXPORT_SYMBOL(target_lun_is_rdonly);
208
209
210
211
212
213
214struct se_dev_entry *core_get_se_deve_from_rtpi(
215 struct se_node_acl *nacl,
216 u16 rtpi)
217{
218 struct se_dev_entry *deve;
219 struct se_lun *lun;
220 struct se_portal_group *tpg = nacl->se_tpg;
221
222 rcu_read_lock();
223 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) {
224 lun = rcu_dereference(deve->se_lun);
225 if (!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());
229 continue;
230 }
231 if (lun->lun_rtpi != rtpi)
232 continue;
233
234 kref_get(&deve->pr_kref);
235 rcu_read_unlock();
236
237 return deve;
238 }
239 rcu_read_unlock();
240
241 return NULL;
242}
243
244void core_free_device_list_for_node(
245 struct se_node_acl *nacl,
246 struct se_portal_group *tpg)
247{
248 struct se_dev_entry *deve;
249
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);
255 }
256 mutex_unlock(&nacl->lun_entry_mutex);
257}
258
259void core_update_device_list_access(
260 u64 mapped_lun,
261 bool lun_access_ro,
262 struct se_node_acl *nacl)
263{
264 struct se_dev_entry *deve;
265
266 mutex_lock(&nacl->lun_entry_mutex);
267 deve = target_nacl_find_deve(nacl, mapped_lun);
268 if (deve)
269 deve->lun_access_ro = lun_access_ro;
270 mutex_unlock(&nacl->lun_entry_mutex);
271}
272
273
274
275
276struct se_dev_entry *target_nacl_find_deve(struct se_node_acl *nacl, u64 mapped_lun)
277{
278 struct se_dev_entry *deve;
279
280 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link)
281 if (deve->mapped_lun == mapped_lun)
282 return deve;
283
284 return NULL;
285}
286EXPORT_SYMBOL(target_nacl_find_deve);
287
288void target_pr_kref_release(struct kref *kref)
289{
290 struct se_dev_entry *deve = container_of(kref, struct se_dev_entry,
291 pr_kref);
292 complete(&deve->pr_comp);
293}
294
295static void
296target_luns_data_has_changed(struct se_node_acl *nacl, struct se_dev_entry *new,
297 bool skip_new)
298{
299 struct se_dev_entry *tmp;
300
301 rcu_read_lock();
302 hlist_for_each_entry_rcu(tmp, &nacl->lun_entry_hlist, link) {
303 if (skip_new && tmp == new)
304 continue;
305 core_scsi3_ua_allocate(tmp, 0x3F,
306 ASCQ_3FH_REPORTED_LUNS_DATA_HAS_CHANGED);
307 }
308 rcu_read_unlock();
309}
310
311int core_enable_device_list_for_node(
312 struct se_lun *lun,
313 struct se_lun_acl *lun_acl,
314 u64 mapped_lun,
315 bool lun_access_ro,
316 struct se_node_acl *nacl,
317 struct se_portal_group *tpg)
318{
319 struct se_dev_entry *orig, *new;
320
321 new = kzalloc(sizeof(*new), GFP_KERNEL);
322 if (!new) {
323 pr_err("Unable to allocate se_dev_entry memory\n");
324 return -ENOMEM;
325 }
326
327 atomic_set(&new->ua_count, 0);
328 spin_lock_init(&new->ua_lock);
329 INIT_LIST_HEAD(&new->ua_list);
330 INIT_LIST_HEAD(&new->lun_link);
331
332 new->mapped_lun = mapped_lun;
333 kref_init(&new->pr_kref);
334 init_completion(&new->pr_comp);
335
336 new->lun_access_ro = lun_access_ro;
337 new->creation_time = get_jiffies_64();
338 new->attach_count++;
339
340 mutex_lock(&nacl->lun_entry_mutex);
341 orig = target_nacl_find_deve(nacl, mapped_lun);
342 if (orig && orig->se_lun) {
343 struct se_lun *orig_lun = rcu_dereference_check(orig->se_lun,
344 lockdep_is_held(&nacl->lun_entry_mutex));
345
346 if (orig_lun != lun) {
347 pr_err("Existing orig->se_lun doesn't match new lun"
348 " for dynamic -> explicit NodeACL conversion:"
349 " %s\n", nacl->initiatorname);
350 mutex_unlock(&nacl->lun_entry_mutex);
351 kfree(new);
352 return -EINVAL;
353 }
354 BUG_ON(orig->se_lun_acl != NULL);
355
356 rcu_assign_pointer(new->se_lun, lun);
357 rcu_assign_pointer(new->se_lun_acl, lun_acl);
358 hlist_del_rcu(&orig->link);
359 hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist);
360 mutex_unlock(&nacl->lun_entry_mutex);
361
362 spin_lock(&lun->lun_deve_lock);
363 list_del(&orig->lun_link);
364 list_add_tail(&new->lun_link, &lun->lun_deve_list);
365 spin_unlock(&lun->lun_deve_lock);
366
367 kref_put(&orig->pr_kref, target_pr_kref_release);
368 wait_for_completion(&orig->pr_comp);
369
370 target_luns_data_has_changed(nacl, new, true);
371 kfree_rcu(orig, rcu_head);
372 return 0;
373 }
374
375 rcu_assign_pointer(new->se_lun, lun);
376 rcu_assign_pointer(new->se_lun_acl, lun_acl);
377 hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist);
378 mutex_unlock(&nacl->lun_entry_mutex);
379
380 spin_lock(&lun->lun_deve_lock);
381 list_add_tail(&new->lun_link, &lun->lun_deve_list);
382 spin_unlock(&lun->lun_deve_lock);
383
384 target_luns_data_has_changed(nacl, new, true);
385 return 0;
386}
387
388
389
390
391void core_disable_device_list_for_node(
392 struct se_lun *lun,
393 struct se_dev_entry *orig,
394 struct se_node_acl *nacl,
395 struct se_portal_group *tpg)
396{
397
398
399
400
401 struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev);
402
403
404
405
406
407
408
409
410
411
412
413
414
415 spin_lock(&lun->lun_deve_lock);
416 list_del(&orig->lun_link);
417 spin_unlock(&lun->lun_deve_lock);
418
419
420
421 core_scsi3_ua_release_all(orig);
422
423 hlist_del_rcu(&orig->link);
424 clear_bit(DEF_PR_REG_ACTIVE, &orig->deve_flags);
425 orig->lun_access_ro = false;
426 orig->creation_time = 0;
427 orig->attach_count--;
428
429
430
431
432 kref_put(&orig->pr_kref, target_pr_kref_release);
433 wait_for_completion(&orig->pr_comp);
434
435 rcu_assign_pointer(orig->se_lun, NULL);
436 rcu_assign_pointer(orig->se_lun_acl, NULL);
437
438 kfree_rcu(orig, rcu_head);
439
440 core_scsi3_free_pr_reg_from_nacl(dev, nacl);
441 target_luns_data_has_changed(nacl, NULL, false);
442}
443
444
445
446
447
448void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
449{
450 struct se_node_acl *nacl;
451 struct se_dev_entry *deve;
452
453 mutex_lock(&tpg->acl_node_mutex);
454 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
455
456 mutex_lock(&nacl->lun_entry_mutex);
457 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) {
458 struct se_lun *tmp_lun = rcu_dereference_check(deve->se_lun,
459 lockdep_is_held(&nacl->lun_entry_mutex));
460
461 if (lun != tmp_lun)
462 continue;
463
464 core_disable_device_list_for_node(lun, deve, nacl, tpg);
465 }
466 mutex_unlock(&nacl->lun_entry_mutex);
467 }
468 mutex_unlock(&tpg->acl_node_mutex);
469}
470
471int core_alloc_rtpi(struct se_lun *lun, struct se_device *dev)
472{
473 struct se_lun *tmp;
474
475 spin_lock(&dev->se_port_lock);
476 if (dev->export_count == 0x0000ffff) {
477 pr_warn("Reached dev->dev_port_count =="
478 " 0x0000ffff\n");
479 spin_unlock(&dev->se_port_lock);
480 return -ENOSPC;
481 }
482again:
483
484
485
486
487
488
489
490
491
492
493
494
495 lun->lun_rtpi = dev->dev_rpti_counter++;
496 if (!lun->lun_rtpi)
497 goto again;
498
499 list_for_each_entry(tmp, &dev->dev_sep_list, lun_dev_link) {
500
501
502
503
504 if (lun->lun_rtpi == tmp->lun_rtpi)
505 goto again;
506 }
507 spin_unlock(&dev->se_port_lock);
508
509 return 0;
510}
511
512static void se_release_vpd_for_dev(struct se_device *dev)
513{
514 struct t10_vpd *vpd, *vpd_tmp;
515
516 spin_lock(&dev->t10_wwn.t10_vpd_lock);
517 list_for_each_entry_safe(vpd, vpd_tmp,
518 &dev->t10_wwn.t10_vpd_list, vpd_list) {
519 list_del(&vpd->vpd_list);
520 kfree(vpd);
521 }
522 spin_unlock(&dev->t10_wwn.t10_vpd_lock);
523}
524
525static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
526{
527 u32 aligned_max_sectors;
528 u32 alignment;
529
530
531
532
533 alignment = max(1ul, PAGE_SIZE / block_size);
534 aligned_max_sectors = rounddown(max_sectors, alignment);
535
536 if (max_sectors != aligned_max_sectors)
537 pr_info("Rounding down aligned max_sectors from %u to %u\n",
538 max_sectors, aligned_max_sectors);
539
540 return aligned_max_sectors;
541}
542
543int core_dev_add_lun(
544 struct se_portal_group *tpg,
545 struct se_device *dev,
546 struct se_lun *lun)
547{
548 int rc;
549
550 rc = core_tpg_add_lun(tpg, lun, false, dev);
551 if (rc < 0)
552 return rc;
553
554 pr_debug("%s_TPG[%u]_LUN[%llu] - Activated %s Logical Unit from"
555 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
556 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
557 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id);
558
559
560
561
562 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
563 struct se_node_acl *acl;
564
565 mutex_lock(&tpg->acl_node_mutex);
566 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
567 if (acl->dynamic_node_acl &&
568 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
569 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
570 core_tpg_add_node_to_devs(acl, tpg, lun);
571 }
572 }
573 mutex_unlock(&tpg->acl_node_mutex);
574 }
575
576 return 0;
577}
578
579
580
581
582
583void core_dev_del_lun(
584 struct se_portal_group *tpg,
585 struct se_lun *lun)
586{
587 pr_debug("%s_TPG[%u]_LUN[%llu] - Deactivating %s Logical Unit from"
588 " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
589 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
590 tpg->se_tpg_tfo->get_fabric_name());
591
592 core_tpg_remove_lun(tpg, lun);
593}
594
595struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
596 struct se_portal_group *tpg,
597 struct se_node_acl *nacl,
598 u64 mapped_lun,
599 int *ret)
600{
601 struct se_lun_acl *lacl;
602
603 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) {
604 pr_err("%s InitiatorName exceeds maximum size.\n",
605 tpg->se_tpg_tfo->get_fabric_name());
606 *ret = -EOVERFLOW;
607 return NULL;
608 }
609 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
610 if (!lacl) {
611 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
612 *ret = -ENOMEM;
613 return NULL;
614 }
615
616 lacl->mapped_lun = mapped_lun;
617 lacl->se_lun_nacl = nacl;
618
619 return lacl;
620}
621
622int core_dev_add_initiator_node_lun_acl(
623 struct se_portal_group *tpg,
624 struct se_lun_acl *lacl,
625 struct se_lun *lun,
626 bool lun_access_ro)
627{
628 struct se_node_acl *nacl = lacl->se_lun_nacl;
629
630
631
632
633 struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev);
634
635 if (!nacl)
636 return -EINVAL;
637
638 if (lun->lun_access_ro)
639 lun_access_ro = true;
640
641 lacl->se_lun = lun;
642
643 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun,
644 lun_access_ro, nacl, tpg) < 0)
645 return -EINVAL;
646
647 pr_debug("%s_TPG[%hu]_LUN[%llu->%llu] - Added %s ACL for "
648 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
649 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, lacl->mapped_lun,
650 lun_access_ro ? "RO" : "RW",
651 nacl->initiatorname);
652
653
654
655
656 core_scsi3_check_aptpl_registration(dev, tpg, lun, nacl,
657 lacl->mapped_lun);
658 return 0;
659}
660
661int core_dev_del_initiator_node_lun_acl(
662 struct se_lun *lun,
663 struct se_lun_acl *lacl)
664{
665 struct se_portal_group *tpg = lun->lun_tpg;
666 struct se_node_acl *nacl;
667 struct se_dev_entry *deve;
668
669 nacl = lacl->se_lun_nacl;
670 if (!nacl)
671 return -EINVAL;
672
673 mutex_lock(&nacl->lun_entry_mutex);
674 deve = target_nacl_find_deve(nacl, lacl->mapped_lun);
675 if (deve)
676 core_disable_device_list_for_node(lun, deve, nacl, tpg);
677 mutex_unlock(&nacl->lun_entry_mutex);
678
679 pr_debug("%s_TPG[%hu]_LUN[%llu] - Removed ACL for"
680 " InitiatorNode: %s Mapped LUN: %llu\n",
681 tpg->se_tpg_tfo->get_fabric_name(),
682 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
683 nacl->initiatorname, lacl->mapped_lun);
684
685 return 0;
686}
687
688void core_dev_free_initiator_node_lun_acl(
689 struct se_portal_group *tpg,
690 struct se_lun_acl *lacl)
691{
692 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
693 " Mapped LUN: %llu\n", tpg->se_tpg_tfo->get_fabric_name(),
694 tpg->se_tpg_tfo->tpg_get_tag(tpg),
695 tpg->se_tpg_tfo->get_fabric_name(),
696 lacl->se_lun_nacl->initiatorname, lacl->mapped_lun);
697
698 kfree(lacl);
699}
700
701static void scsi_dump_inquiry(struct se_device *dev)
702{
703 struct t10_wwn *wwn = &dev->t10_wwn;
704 char buf[17];
705 int i, device_type;
706
707
708
709 for (i = 0; i < 8; i++)
710 if (wwn->vendor[i] >= 0x20)
711 buf[i] = wwn->vendor[i];
712 else
713 buf[i] = ' ';
714 buf[i] = '\0';
715 pr_debug(" Vendor: %s\n", buf);
716
717 for (i = 0; i < 16; i++)
718 if (wwn->model[i] >= 0x20)
719 buf[i] = wwn->model[i];
720 else
721 buf[i] = ' ';
722 buf[i] = '\0';
723 pr_debug(" Model: %s\n", buf);
724
725 for (i = 0; i < 4; i++)
726 if (wwn->revision[i] >= 0x20)
727 buf[i] = wwn->revision[i];
728 else
729 buf[i] = ' ';
730 buf[i] = '\0';
731 pr_debug(" Revision: %s\n", buf);
732
733 device_type = dev->transport->get_device_type(dev);
734 pr_debug(" Type: %s ", scsi_device_type(device_type));
735}
736
737struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
738{
739 struct se_device *dev;
740 struct se_lun *xcopy_lun;
741
742 dev = hba->backend->ops->alloc_device(hba, name);
743 if (!dev)
744 return NULL;
745
746 dev->dev_link_magic = SE_DEV_LINK_MAGIC;
747 dev->se_hba = hba;
748 dev->transport = hba->backend->ops;
749 dev->prot_length = sizeof(struct t10_pi_tuple);
750 dev->hba_index = hba->hba_index;
751
752 INIT_LIST_HEAD(&dev->dev_list);
753 INIT_LIST_HEAD(&dev->dev_sep_list);
754 INIT_LIST_HEAD(&dev->dev_tmr_list);
755 INIT_LIST_HEAD(&dev->delayed_cmd_list);
756 INIT_LIST_HEAD(&dev->state_list);
757 INIT_LIST_HEAD(&dev->qf_cmd_list);
758 INIT_LIST_HEAD(&dev->g_dev_node);
759 spin_lock_init(&dev->execute_task_lock);
760 spin_lock_init(&dev->delayed_cmd_lock);
761 spin_lock_init(&dev->dev_reservation_lock);
762 spin_lock_init(&dev->se_port_lock);
763 spin_lock_init(&dev->se_tmr_lock);
764 spin_lock_init(&dev->qf_cmd_lock);
765 sema_init(&dev->caw_sem, 1);
766 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list);
767 spin_lock_init(&dev->t10_wwn.t10_vpd_lock);
768 INIT_LIST_HEAD(&dev->t10_pr.registration_list);
769 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list);
770 spin_lock_init(&dev->t10_pr.registration_lock);
771 spin_lock_init(&dev->t10_pr.aptpl_reg_lock);
772 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list);
773 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock);
774 INIT_LIST_HEAD(&dev->t10_alua.lba_map_list);
775 spin_lock_init(&dev->t10_alua.lba_map_lock);
776
777 dev->t10_wwn.t10_dev = dev;
778 dev->t10_alua.t10_dev = dev;
779
780 dev->dev_attrib.da_dev = dev;
781 dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS;
782 dev->dev_attrib.emulate_dpo = 1;
783 dev->dev_attrib.emulate_fua_write = 1;
784 dev->dev_attrib.emulate_fua_read = 1;
785 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
786 dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
787 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS;
788 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU;
789 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
790 dev->dev_attrib.emulate_caw = DA_EMULATE_CAW;
791 dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC;
792 dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT;
793 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
794 dev->dev_attrib.force_pr_aptpl = DA_FORCE_PR_APTPL;
795 dev->dev_attrib.is_nonrot = DA_IS_NONROT;
796 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
797 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
798 dev->dev_attrib.max_unmap_block_desc_count =
799 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
800 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
801 dev->dev_attrib.unmap_granularity_alignment =
802 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
803 dev->dev_attrib.unmap_zeroes_data =
804 DA_UNMAP_ZEROES_DATA_DEFAULT;
805 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN;
806
807 xcopy_lun = &dev->xcopy_lun;
808 rcu_assign_pointer(xcopy_lun->lun_se_dev, dev);
809 init_completion(&xcopy_lun->lun_ref_comp);
810 INIT_LIST_HEAD(&xcopy_lun->lun_deve_list);
811 INIT_LIST_HEAD(&xcopy_lun->lun_dev_link);
812 mutex_init(&xcopy_lun->lun_tg_pt_md_mutex);
813 xcopy_lun->lun_tpg = &xcopy_pt_tpg;
814
815 return dev;
816}
817
818
819
820
821
822
823bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib,
824 struct request_queue *q)
825{
826 int block_size = queue_logical_block_size(q);
827
828 if (!blk_queue_discard(q))
829 return false;
830
831 attrib->max_unmap_lba_count =
832 q->limits.max_discard_sectors >> (ilog2(block_size) - 9);
833
834
835
836 attrib->max_unmap_block_desc_count = 1;
837 attrib->unmap_granularity = q->limits.discard_granularity / block_size;
838 attrib->unmap_granularity_alignment = q->limits.discard_alignment /
839 block_size;
840 attrib->unmap_zeroes_data = q->limits.discard_zeroes_data;
841 return true;
842}
843EXPORT_SYMBOL(target_configure_unmap_from_queue);
844
845
846
847
848
849sector_t target_to_linux_sector(struct se_device *dev, sector_t lb)
850{
851 switch (dev->dev_attrib.block_size) {
852 case 4096:
853 return lb << 3;
854 case 2048:
855 return lb << 2;
856 case 1024:
857 return lb << 1;
858 default:
859 return lb;
860 }
861}
862EXPORT_SYMBOL(target_to_linux_sector);
863
864int target_configure_device(struct se_device *dev)
865{
866 struct se_hba *hba = dev->se_hba;
867 int ret;
868
869 if (dev->dev_flags & DF_CONFIGURED) {
870 pr_err("se_dev->se_dev_ptr already set for storage"
871 " object\n");
872 return -EEXIST;
873 }
874
875 ret = dev->transport->configure_device(dev);
876 if (ret)
877 goto out;
878
879
880
881 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size;
882 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth;
883
884
885
886
887 dev->dev_attrib.hw_max_sectors =
888 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors,
889 dev->dev_attrib.hw_block_size);
890 dev->dev_attrib.optimal_sectors = dev->dev_attrib.hw_max_sectors;
891
892 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX);
893 dev->creation_time = get_jiffies_64();
894
895 ret = core_setup_alua(dev);
896 if (ret)
897 goto out;
898
899
900
901
902 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1,
903 dev->transport->name);
904 if (!dev->tmr_wq) {
905 pr_err("Unable to create tmr workqueue for %s\n",
906 dev->transport->name);
907 ret = -ENOMEM;
908 goto out_free_alua;
909 }
910
911
912
913
914 INIT_WORK(&dev->qf_work_queue, target_qf_do_work);
915
916
917
918
919
920
921 if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)) {
922 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8);
923 strncpy(&dev->t10_wwn.model[0],
924 dev->transport->inquiry_prod, 16);
925 strncpy(&dev->t10_wwn.revision[0],
926 dev->transport->inquiry_rev, 4);
927 }
928
929 scsi_dump_inquiry(dev);
930
931 spin_lock(&hba->device_lock);
932 hba->dev_count++;
933 spin_unlock(&hba->device_lock);
934
935 mutex_lock(&g_device_mutex);
936 list_add_tail(&dev->g_dev_node, &g_device_list);
937 mutex_unlock(&g_device_mutex);
938
939 dev->dev_flags |= DF_CONFIGURED;
940
941 return 0;
942
943out_free_alua:
944 core_alua_free_lu_gp_mem(dev);
945out:
946 se_release_vpd_for_dev(dev);
947 return ret;
948}
949
950void target_free_device(struct se_device *dev)
951{
952 struct se_hba *hba = dev->se_hba;
953
954 WARN_ON(!list_empty(&dev->dev_sep_list));
955
956 if (dev->dev_flags & DF_CONFIGURED) {
957 destroy_workqueue(dev->tmr_wq);
958
959 mutex_lock(&g_device_mutex);
960 list_del(&dev->g_dev_node);
961 mutex_unlock(&g_device_mutex);
962
963 spin_lock(&hba->device_lock);
964 hba->dev_count--;
965 spin_unlock(&hba->device_lock);
966 }
967
968 core_alua_free_lu_gp_mem(dev);
969 core_alua_set_lba_map(dev, NULL, 0, 0);
970 core_scsi3_free_all_registrations(dev);
971 se_release_vpd_for_dev(dev);
972
973 if (dev->transport->free_prot)
974 dev->transport->free_prot(dev);
975
976 dev->transport->free_device(dev);
977}
978
979int core_dev_setup_virtual_lun0(void)
980{
981 struct se_hba *hba;
982 struct se_device *dev;
983 char buf[] = "rd_pages=8,rd_nullio=1";
984 int ret;
985
986 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
987 if (IS_ERR(hba))
988 return PTR_ERR(hba);
989
990 dev = target_alloc_device(hba, "virt_lun0");
991 if (!dev) {
992 ret = -ENOMEM;
993 goto out_free_hba;
994 }
995
996 hba->backend->ops->set_configfs_dev_params(dev, buf, sizeof(buf));
997
998 ret = target_configure_device(dev);
999 if (ret)
1000 goto out_free_se_dev;
1001
1002 lun0_hba = hba;
1003 g_lun0_dev = dev;
1004 return 0;
1005
1006out_free_se_dev:
1007 target_free_device(dev);
1008out_free_hba:
1009 core_delete_hba(hba);
1010 return ret;
1011}
1012
1013
1014void core_dev_release_virtual_lun0(void)
1015{
1016 struct se_hba *hba = lun0_hba;
1017
1018 if (!hba)
1019 return;
1020
1021 if (g_lun0_dev)
1022 target_free_device(g_lun0_dev);
1023 core_delete_hba(hba);
1024}
1025
1026
1027
1028
1029sense_reason_t
1030passthrough_parse_cdb(struct se_cmd *cmd,
1031 sense_reason_t (*exec_cmd)(struct se_cmd *cmd))
1032{
1033 unsigned char *cdb = cmd->t_task_cdb;
1034
1035
1036
1037
1038
1039
1040 switch (cdb[0]) {
1041 case READ_10:
1042 case READ_12:
1043 case READ_16:
1044 case SEND_DIAGNOSTIC:
1045 case VERIFY:
1046 case VERIFY_16:
1047 case WRITE_VERIFY:
1048 case WRITE_VERIFY_12:
1049 case MAINTENANCE_IN:
1050 break;
1051 default:
1052 cdb[1] &= 0x1f;
1053 break;
1054 }
1055
1056
1057
1058
1059
1060 if (cdb[0] == REPORT_LUNS) {
1061 cmd->execute_cmd = spc_emulate_report_luns;
1062 return TCM_NO_SENSE;
1063 }
1064
1065
1066 switch (cdb[0]) {
1067 case READ_6:
1068 case READ_10:
1069 case READ_12:
1070 case READ_16:
1071 case WRITE_6:
1072 case WRITE_10:
1073 case WRITE_12:
1074 case WRITE_16:
1075 case WRITE_VERIFY:
1076 case WRITE_VERIFY_12:
1077 case 0x8e:
1078 case COMPARE_AND_WRITE:
1079 case XDWRITEREAD_10:
1080 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1081 break;
1082 case VARIABLE_LENGTH_CMD:
1083 switch (get_unaligned_be16(&cdb[8])) {
1084 case READ_32:
1085 case WRITE_32:
1086 case 0x0c:
1087 case XDWRITEREAD_32:
1088 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1089 break;
1090 }
1091 }
1092
1093 cmd->execute_cmd = exec_cmd;
1094
1095 return TCM_NO_SENSE;
1096}
1097EXPORT_SYMBOL(passthrough_parse_cdb);
1098