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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*******************************************************************************
3 * Filename: target_core_device.c (based on iscsi_target_device.c)
4 *
5 * This file contains the TCM Virtual Device and Disk Transport
6 * agnostic related functions.
7 *
8 * (c) Copyright 2003-2013 Datera, Inc.
9 *
10 * Nicholas A. Bellinger <nab@kernel.org>
11 *
12 ******************************************************************************/
13
14#include <linux/net.h>
15#include <linux/string.h>
16#include <linux/delay.h>
17#include <linux/timer.h>
18#include <linux/slab.h>
19#include <linux/spinlock.h>
20#include <linux/kthread.h>
21#include <linux/in.h>
22#include <linux/export.h>
23#include <linux/t10-pi.h>
24#include <asm/unaligned.h>
25#include <net/sock.h>
26#include <net/tcp.h>
27#include <scsi/scsi_common.h>
28#include <scsi/scsi_proto.h>
29
30#include <target/target_core_base.h>
31#include <target/target_core_backend.h>
32#include <target/target_core_fabric.h>
33
34#include "target_core_internal.h"
35#include "target_core_alua.h"
36#include "target_core_pr.h"
37#include "target_core_ua.h"
38
39static DEFINE_MUTEX(device_mutex);
40static LIST_HEAD(device_list);
41static DEFINE_IDR(devices_idr);
42
43static struct se_hba *lun0_hba;
44/* not static, needed by tpg.c */
45struct se_device *g_lun0_dev;
46
47sense_reason_t
48transport_lookup_cmd_lun(struct se_cmd *se_cmd)
49{
50 struct se_lun *se_lun = NULL;
51 struct se_session *se_sess = se_cmd->se_sess;
52 struct se_node_acl *nacl = se_sess->se_node_acl;
53 struct se_dev_entry *deve;
54 sense_reason_t ret = TCM_NO_SENSE;
55
56 rcu_read_lock();
57 deve = target_nacl_find_deve(nacl, se_cmd->orig_fe_lun);
58 if (deve) {
59 atomic_long_inc(&deve->total_cmds);
60
61 if (se_cmd->data_direction == DMA_TO_DEVICE)
62 atomic_long_add(se_cmd->data_length,
63 &deve->write_bytes);
64 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
65 atomic_long_add(se_cmd->data_length,
66 &deve->read_bytes);
67
68 if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
69 deve->lun_access_ro) {
70 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
71 " Access for 0x%08llx\n",
72 se_cmd->se_tfo->fabric_name,
73 se_cmd->orig_fe_lun);
74 rcu_read_unlock();
75 return TCM_WRITE_PROTECTED;
76 }
77
78 se_lun = deve->se_lun;
79
80 if (!percpu_ref_tryget_live(&se_lun->lun_ref)) {
81 se_lun = NULL;
82 goto out_unlock;
83 }
84
85 se_cmd->se_lun = se_lun;
86 se_cmd->pr_res_key = deve->pr_res_key;
87 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
88 se_cmd->lun_ref_active = true;
89 }
90out_unlock:
91 rcu_read_unlock();
92
93 if (!se_lun) {
94 /*
95 * Use the se_portal_group->tpg_virt_lun0 to allow for
96 * REPORT_LUNS, et al to be returned when no active
97 * MappedLUN=0 exists for this Initiator Port.
98 */
99 if (se_cmd->orig_fe_lun != 0) {
100 pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
101 " Access for 0x%08llx from %s\n",
102 se_cmd->se_tfo->fabric_name,
103 se_cmd->orig_fe_lun,
104 nacl->initiatorname);
105 return TCM_NON_EXISTENT_LUN;
106 }
107
108 /*
109 * Force WRITE PROTECT for virtual LUN 0
110 */
111 if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
112 (se_cmd->data_direction != DMA_NONE))
113 return TCM_WRITE_PROTECTED;
114
115 se_lun = se_sess->se_tpg->tpg_virt_lun0;
116 if (!percpu_ref_tryget_live(&se_lun->lun_ref))
117 return TCM_NON_EXISTENT_LUN;
118
119 se_cmd->se_lun = se_sess->se_tpg->tpg_virt_lun0;
120 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
121 se_cmd->lun_ref_active = true;
122 }
123 /*
124 * RCU reference protected by percpu se_lun->lun_ref taken above that
125 * must drop to zero (including initial reference) before this se_lun
126 * pointer can be kfree_rcu() by the final se_lun->lun_group put via
127 * target_core_fabric_configfs.c:target_fabric_port_release
128 */
129 se_cmd->se_dev = rcu_dereference_raw(se_lun->lun_se_dev);
130 atomic_long_inc(&se_cmd->se_dev->num_cmds);
131
132 if (se_cmd->data_direction == DMA_TO_DEVICE)
133 atomic_long_add(se_cmd->data_length,
134 &se_cmd->se_dev->write_bytes);
135 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
136 atomic_long_add(se_cmd->data_length,
137 &se_cmd->se_dev->read_bytes);
138
139 return ret;
140}
141EXPORT_SYMBOL(transport_lookup_cmd_lun);
142
143int transport_lookup_tmr_lun(struct se_cmd *se_cmd)
144{
145 struct se_dev_entry *deve;
146 struct se_lun *se_lun = NULL;
147 struct se_session *se_sess = se_cmd->se_sess;
148 struct se_node_acl *nacl = se_sess->se_node_acl;
149 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
150 unsigned long flags;
151
152 rcu_read_lock();
153 deve = target_nacl_find_deve(nacl, se_cmd->orig_fe_lun);
154 if (deve) {
155 se_lun = deve->se_lun;
156
157 if (!percpu_ref_tryget_live(&se_lun->lun_ref)) {
158 se_lun = NULL;
159 goto out_unlock;
160 }
161
162 se_cmd->se_lun = se_lun;
163 se_cmd->pr_res_key = deve->pr_res_key;
164 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
165 se_cmd->lun_ref_active = true;
166 }
167out_unlock:
168 rcu_read_unlock();
169
170 if (!se_lun) {
171 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
172 " Access for 0x%08llx for %s\n",
173 se_cmd->se_tfo->fabric_name,
174 se_cmd->orig_fe_lun,
175 nacl->initiatorname);
176 return -ENODEV;
177 }
178 se_cmd->se_dev = rcu_dereference_raw(se_lun->lun_se_dev);
179 se_tmr->tmr_dev = rcu_dereference_raw(se_lun->lun_se_dev);
180
181 spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags);
182 list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list);
183 spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags);
184
185 return 0;
186}
187EXPORT_SYMBOL(transport_lookup_tmr_lun);
188
189bool target_lun_is_rdonly(struct se_cmd *cmd)
190{
191 struct se_session *se_sess = cmd->se_sess;
192 struct se_dev_entry *deve;
193 bool ret;
194
195 rcu_read_lock();
196 deve = target_nacl_find_deve(se_sess->se_node_acl, cmd->orig_fe_lun);
197 ret = deve && deve->lun_access_ro;
198 rcu_read_unlock();
199
200 return ret;
201}
202EXPORT_SYMBOL(target_lun_is_rdonly);
203
204/*
205 * This function is called from core_scsi3_emulate_pro_register_and_move()
206 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_kref
207 * when a matching rtpi is found.
208 */
209struct se_dev_entry *core_get_se_deve_from_rtpi(
210 struct se_node_acl *nacl,
211 u16 rtpi)
212{
213 struct se_dev_entry *deve;
214 struct se_lun *lun;
215 struct se_portal_group *tpg = nacl->se_tpg;
216
217 rcu_read_lock();
218 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) {
219 lun = deve->se_lun;
220 if (!lun) {
221 pr_err("%s device entries device pointer is"
222 " NULL, but Initiator has access.\n",
223 tpg->se_tpg_tfo->fabric_name);
224 continue;
225 }
226 if (lun->lun_rtpi != rtpi)
227 continue;
228
229 kref_get(&deve->pr_kref);
230 rcu_read_unlock();
231
232 return deve;
233 }
234 rcu_read_unlock();
235
236 return NULL;
237}
238
239void core_free_device_list_for_node(
240 struct se_node_acl *nacl,
241 struct se_portal_group *tpg)
242{
243 struct se_dev_entry *deve;
244
245 mutex_lock(&nacl->lun_entry_mutex);
246 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link)
247 core_disable_device_list_for_node(deve->se_lun, deve, nacl, tpg);
248 mutex_unlock(&nacl->lun_entry_mutex);
249}
250
251void core_update_device_list_access(
252 u64 mapped_lun,
253 bool lun_access_ro,
254 struct se_node_acl *nacl)
255{
256 struct se_dev_entry *deve;
257
258 mutex_lock(&nacl->lun_entry_mutex);
259 deve = target_nacl_find_deve(nacl, mapped_lun);
260 if (deve)
261 deve->lun_access_ro = lun_access_ro;
262 mutex_unlock(&nacl->lun_entry_mutex);
263}
264
265/*
266 * Called with rcu_read_lock or nacl->device_list_lock held.
267 */
268struct se_dev_entry *target_nacl_find_deve(struct se_node_acl *nacl, u64 mapped_lun)
269{
270 struct se_dev_entry *deve;
271
272 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link)
273 if (deve->mapped_lun == mapped_lun)
274 return deve;
275
276 return NULL;
277}
278EXPORT_SYMBOL(target_nacl_find_deve);
279
280void target_pr_kref_release(struct kref *kref)
281{
282 struct se_dev_entry *deve = container_of(kref, struct se_dev_entry,
283 pr_kref);
284 complete(&deve->pr_comp);
285}
286
287/*
288 * Establish UA condition on SCSI device - all LUNs
289 */
290void target_dev_ua_allocate(struct se_device *dev, u8 asc, u8 ascq)
291{
292 struct se_dev_entry *se_deve;
293 struct se_lun *lun;
294
295 spin_lock(&dev->se_port_lock);
296 list_for_each_entry(lun, &dev->dev_sep_list, lun_dev_link) {
297
298 spin_lock(&lun->lun_deve_lock);
299 list_for_each_entry(se_deve, &lun->lun_deve_list, lun_link)
300 core_scsi3_ua_allocate(se_deve, asc, ascq);
301 spin_unlock(&lun->lun_deve_lock);
302 }
303 spin_unlock(&dev->se_port_lock);
304}
305
306static void
307target_luns_data_has_changed(struct se_node_acl *nacl, struct se_dev_entry *new,
308 bool skip_new)
309{
310 struct se_dev_entry *tmp;
311
312 rcu_read_lock();
313 hlist_for_each_entry_rcu(tmp, &nacl->lun_entry_hlist, link) {
314 if (skip_new && tmp == new)
315 continue;
316 core_scsi3_ua_allocate(tmp, 0x3F,
317 ASCQ_3FH_REPORTED_LUNS_DATA_HAS_CHANGED);
318 }
319 rcu_read_unlock();
320}
321
322int core_enable_device_list_for_node(
323 struct se_lun *lun,
324 struct se_lun_acl *lun_acl,
325 u64 mapped_lun,
326 bool lun_access_ro,
327 struct se_node_acl *nacl,
328 struct se_portal_group *tpg)
329{
330 struct se_dev_entry *orig, *new;
331
332 new = kzalloc(sizeof(*new), GFP_KERNEL);
333 if (!new) {
334 pr_err("Unable to allocate se_dev_entry memory\n");
335 return -ENOMEM;
336 }
337
338 spin_lock_init(&new->ua_lock);
339 INIT_LIST_HEAD(&new->ua_list);
340 INIT_LIST_HEAD(&new->lun_link);
341
342 new->mapped_lun = mapped_lun;
343 kref_init(&new->pr_kref);
344 init_completion(&new->pr_comp);
345
346 new->lun_access_ro = lun_access_ro;
347 new->creation_time = get_jiffies_64();
348 new->attach_count++;
349
350 mutex_lock(&nacl->lun_entry_mutex);
351 orig = target_nacl_find_deve(nacl, mapped_lun);
352 if (orig && orig->se_lun) {
353 struct se_lun *orig_lun = orig->se_lun;
354
355 if (orig_lun != lun) {
356 pr_err("Existing orig->se_lun doesn't match new lun"
357 " for dynamic -> explicit NodeACL conversion:"
358 " %s\n", nacl->initiatorname);
359 mutex_unlock(&nacl->lun_entry_mutex);
360 kfree(new);
361 return -EINVAL;
362 }
363 if (orig->se_lun_acl != NULL) {
364 pr_warn_ratelimited("Detected existing explicit"
365 " se_lun_acl->se_lun_group reference for %s"
366 " mapped_lun: %llu, failing\n",
367 nacl->initiatorname, mapped_lun);
368 mutex_unlock(&nacl->lun_entry_mutex);
369 kfree(new);
370 return -EINVAL;
371 }
372
373 new->se_lun = lun;
374 new->se_lun_acl = lun_acl;
375 hlist_del_rcu(&orig->link);
376 hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist);
377 mutex_unlock(&nacl->lun_entry_mutex);
378
379 spin_lock(&lun->lun_deve_lock);
380 list_del(&orig->lun_link);
381 list_add_tail(&new->lun_link, &lun->lun_deve_list);
382 spin_unlock(&lun->lun_deve_lock);
383
384 kref_put(&orig->pr_kref, target_pr_kref_release);
385 wait_for_completion(&orig->pr_comp);
386
387 target_luns_data_has_changed(nacl, new, true);
388 kfree_rcu(orig, rcu_head);
389 return 0;
390 }
391
392 new->se_lun = lun;
393 new->se_lun_acl = lun_acl;
394 hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist);
395 mutex_unlock(&nacl->lun_entry_mutex);
396
397 spin_lock(&lun->lun_deve_lock);
398 list_add_tail(&new->lun_link, &lun->lun_deve_list);
399 spin_unlock(&lun->lun_deve_lock);
400
401 target_luns_data_has_changed(nacl, new, true);
402 return 0;
403}
404
405void core_disable_device_list_for_node(
406 struct se_lun *lun,
407 struct se_dev_entry *orig,
408 struct se_node_acl *nacl,
409 struct se_portal_group *tpg)
410{
411 /*
412 * rcu_dereference_raw protected by se_lun->lun_group symlink
413 * reference to se_device->dev_group.
414 */
415 struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev);
416
417 lockdep_assert_held(&nacl->lun_entry_mutex);
418
419 /*
420 * If the MappedLUN entry is being disabled, the entry in
421 * lun->lun_deve_list must be removed now before clearing the
422 * struct se_dev_entry pointers below as logic in
423 * core_alua_do_transition_tg_pt() depends on these being present.
424 *
425 * deve->se_lun_acl will be NULL for demo-mode created LUNs
426 * that have not been explicitly converted to MappedLUNs ->
427 * struct se_lun_acl, but we remove deve->lun_link from
428 * lun->lun_deve_list. This also means that active UAs and
429 * NodeACL context specific PR metadata for demo-mode
430 * MappedLUN *deve will be released below..
431 */
432 spin_lock(&lun->lun_deve_lock);
433 list_del(&orig->lun_link);
434 spin_unlock(&lun->lun_deve_lock);
435 /*
436 * Disable struct se_dev_entry LUN ACL mapping
437 */
438 core_scsi3_ua_release_all(orig);
439
440 hlist_del_rcu(&orig->link);
441 clear_bit(DEF_PR_REG_ACTIVE, &orig->deve_flags);
442 orig->lun_access_ro = false;
443 orig->creation_time = 0;
444 orig->attach_count--;
445 /*
446 * Before firing off RCU callback, wait for any in process SPEC_I_PT=1
447 * or REGISTER_AND_MOVE PR operation to complete.
448 */
449 kref_put(&orig->pr_kref, target_pr_kref_release);
450 wait_for_completion(&orig->pr_comp);
451
452 kfree_rcu(orig, rcu_head);
453
454 core_scsi3_free_pr_reg_from_nacl(dev, nacl);
455 target_luns_data_has_changed(nacl, NULL, false);
456}
457
458/* core_clear_lun_from_tpg():
459 *
460 *
461 */
462void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
463{
464 struct se_node_acl *nacl;
465 struct se_dev_entry *deve;
466
467 mutex_lock(&tpg->acl_node_mutex);
468 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
469
470 mutex_lock(&nacl->lun_entry_mutex);
471 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) {
472 if (lun != deve->se_lun)
473 continue;
474
475 core_disable_device_list_for_node(lun, deve, nacl, tpg);
476 }
477 mutex_unlock(&nacl->lun_entry_mutex);
478 }
479 mutex_unlock(&tpg->acl_node_mutex);
480}
481
482int core_alloc_rtpi(struct se_lun *lun, struct se_device *dev)
483{
484 struct se_lun *tmp;
485
486 spin_lock(&dev->se_port_lock);
487 if (dev->export_count == 0x0000ffff) {
488 pr_warn("Reached dev->dev_port_count =="
489 " 0x0000ffff\n");
490 spin_unlock(&dev->se_port_lock);
491 return -ENOSPC;
492 }
493again:
494 /*
495 * Allocate the next RELATIVE TARGET PORT IDENTIFIER for this struct se_device
496 * Here is the table from spc4r17 section 7.7.3.8.
497 *
498 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
499 *
500 * Code Description
501 * 0h Reserved
502 * 1h Relative port 1, historically known as port A
503 * 2h Relative port 2, historically known as port B
504 * 3h to FFFFh Relative port 3 through 65 535
505 */
506 lun->lun_rtpi = dev->dev_rpti_counter++;
507 if (!lun->lun_rtpi)
508 goto again;
509
510 list_for_each_entry(tmp, &dev->dev_sep_list, lun_dev_link) {
511 /*
512 * Make sure RELATIVE TARGET PORT IDENTIFIER is unique
513 * for 16-bit wrap..
514 */
515 if (lun->lun_rtpi == tmp->lun_rtpi)
516 goto again;
517 }
518 spin_unlock(&dev->se_port_lock);
519
520 return 0;
521}
522
523static void se_release_vpd_for_dev(struct se_device *dev)
524{
525 struct t10_vpd *vpd, *vpd_tmp;
526
527 spin_lock(&dev->t10_wwn.t10_vpd_lock);
528 list_for_each_entry_safe(vpd, vpd_tmp,
529 &dev->t10_wwn.t10_vpd_list, vpd_list) {
530 list_del(&vpd->vpd_list);
531 kfree(vpd);
532 }
533 spin_unlock(&dev->t10_wwn.t10_vpd_lock);
534}
535
536static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
537{
538 u32 aligned_max_sectors;
539 u32 alignment;
540 /*
541 * Limit max_sectors to a PAGE_SIZE aligned value for modern
542 * transport_allocate_data_tasks() operation.
543 */
544 alignment = max(1ul, PAGE_SIZE / block_size);
545 aligned_max_sectors = rounddown(max_sectors, alignment);
546
547 if (max_sectors != aligned_max_sectors)
548 pr_info("Rounding down aligned max_sectors from %u to %u\n",
549 max_sectors, aligned_max_sectors);
550
551 return aligned_max_sectors;
552}
553
554int core_dev_add_lun(
555 struct se_portal_group *tpg,
556 struct se_device *dev,
557 struct se_lun *lun)
558{
559 int rc;
560
561 rc = core_tpg_add_lun(tpg, lun, false, dev);
562 if (rc < 0)
563 return rc;
564
565 pr_debug("%s_TPG[%u]_LUN[%llu] - Activated %s Logical Unit from"
566 " CORE HBA: %u\n", tpg->se_tpg_tfo->fabric_name,
567 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
568 tpg->se_tpg_tfo->fabric_name, dev->se_hba->hba_id);
569 /*
570 * Update LUN maps for dynamically added initiators when
571 * generate_node_acl is enabled.
572 */
573 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
574 struct se_node_acl *acl;
575
576 mutex_lock(&tpg->acl_node_mutex);
577 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
578 if (acl->dynamic_node_acl &&
579 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
580 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
581 core_tpg_add_node_to_devs(acl, tpg, lun);
582 }
583 }
584 mutex_unlock(&tpg->acl_node_mutex);
585 }
586
587 return 0;
588}
589
590/* core_dev_del_lun():
591 *
592 *
593 */
594void core_dev_del_lun(
595 struct se_portal_group *tpg,
596 struct se_lun *lun)
597{
598 pr_debug("%s_TPG[%u]_LUN[%llu] - Deactivating %s Logical Unit from"
599 " device object\n", tpg->se_tpg_tfo->fabric_name,
600 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
601 tpg->se_tpg_tfo->fabric_name);
602
603 core_tpg_remove_lun(tpg, lun);
604}
605
606struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
607 struct se_portal_group *tpg,
608 struct se_node_acl *nacl,
609 u64 mapped_lun,
610 int *ret)
611{
612 struct se_lun_acl *lacl;
613
614 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) {
615 pr_err("%s InitiatorName exceeds maximum size.\n",
616 tpg->se_tpg_tfo->fabric_name);
617 *ret = -EOVERFLOW;
618 return NULL;
619 }
620 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
621 if (!lacl) {
622 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
623 *ret = -ENOMEM;
624 return NULL;
625 }
626
627 lacl->mapped_lun = mapped_lun;
628 lacl->se_lun_nacl = nacl;
629
630 return lacl;
631}
632
633int core_dev_add_initiator_node_lun_acl(
634 struct se_portal_group *tpg,
635 struct se_lun_acl *lacl,
636 struct se_lun *lun,
637 bool lun_access_ro)
638{
639 struct se_node_acl *nacl = lacl->se_lun_nacl;
640 /*
641 * rcu_dereference_raw protected by se_lun->lun_group symlink
642 * reference to se_device->dev_group.
643 */
644 struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev);
645
646 if (!nacl)
647 return -EINVAL;
648
649 if (lun->lun_access_ro)
650 lun_access_ro = true;
651
652 lacl->se_lun = lun;
653
654 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun,
655 lun_access_ro, nacl, tpg) < 0)
656 return -EINVAL;
657
658 pr_debug("%s_TPG[%hu]_LUN[%llu->%llu] - Added %s ACL for "
659 " InitiatorNode: %s\n", tpg->se_tpg_tfo->fabric_name,
660 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, lacl->mapped_lun,
661 lun_access_ro ? "RO" : "RW",
662 nacl->initiatorname);
663 /*
664 * Check to see if there are any existing persistent reservation APTPL
665 * pre-registrations that need to be enabled for this LUN ACL..
666 */
667 core_scsi3_check_aptpl_registration(dev, tpg, lun, nacl,
668 lacl->mapped_lun);
669 return 0;
670}
671
672int core_dev_del_initiator_node_lun_acl(
673 struct se_lun *lun,
674 struct se_lun_acl *lacl)
675{
676 struct se_portal_group *tpg = lun->lun_tpg;
677 struct se_node_acl *nacl;
678 struct se_dev_entry *deve;
679
680 nacl = lacl->se_lun_nacl;
681 if (!nacl)
682 return -EINVAL;
683
684 mutex_lock(&nacl->lun_entry_mutex);
685 deve = target_nacl_find_deve(nacl, lacl->mapped_lun);
686 if (deve)
687 core_disable_device_list_for_node(lun, deve, nacl, tpg);
688 mutex_unlock(&nacl->lun_entry_mutex);
689
690 pr_debug("%s_TPG[%hu]_LUN[%llu] - Removed ACL for"
691 " InitiatorNode: %s Mapped LUN: %llu\n",
692 tpg->se_tpg_tfo->fabric_name,
693 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
694 nacl->initiatorname, lacl->mapped_lun);
695
696 return 0;
697}
698
699void core_dev_free_initiator_node_lun_acl(
700 struct se_portal_group *tpg,
701 struct se_lun_acl *lacl)
702{
703 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
704 " Mapped LUN: %llu\n", tpg->se_tpg_tfo->fabric_name,
705 tpg->se_tpg_tfo->tpg_get_tag(tpg),
706 tpg->se_tpg_tfo->fabric_name,
707 lacl->se_lun_nacl->initiatorname, lacl->mapped_lun);
708
709 kfree(lacl);
710}
711
712static void scsi_dump_inquiry(struct se_device *dev)
713{
714 struct t10_wwn *wwn = &dev->t10_wwn;
715 int device_type = dev->transport->get_device_type(dev);
716
717 /*
718 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer
719 */
720 pr_debug(" Vendor: %-" __stringify(INQUIRY_VENDOR_LEN) "s\n",
721 wwn->vendor);
722 pr_debug(" Model: %-" __stringify(INQUIRY_MODEL_LEN) "s\n",
723 wwn->model);
724 pr_debug(" Revision: %-" __stringify(INQUIRY_REVISION_LEN) "s\n",
725 wwn->revision);
726 pr_debug(" Type: %s ", scsi_device_type(device_type));
727}
728
729struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
730{
731 struct se_device *dev;
732 struct se_lun *xcopy_lun;
733 int i;
734
735 dev = hba->backend->ops->alloc_device(hba, name);
736 if (!dev)
737 return NULL;
738
739 dev->queues = kcalloc(nr_cpu_ids, sizeof(*dev->queues), GFP_KERNEL);
740 if (!dev->queues) {
741 dev->transport->free_device(dev);
742 return NULL;
743 }
744
745 dev->queue_cnt = nr_cpu_ids;
746 for (i = 0; i < dev->queue_cnt; i++) {
747 struct se_device_queue *q;
748
749 q = &dev->queues[i];
750 INIT_LIST_HEAD(&q->state_list);
751 spin_lock_init(&q->lock);
752
753 init_llist_head(&q->sq.cmd_list);
754 INIT_WORK(&q->sq.work, target_queued_submit_work);
755 }
756
757 dev->se_hba = hba;
758 dev->transport = hba->backend->ops;
759 dev->transport_flags = dev->transport->transport_flags_default;
760 dev->prot_length = sizeof(struct t10_pi_tuple);
761 dev->hba_index = hba->hba_index;
762
763 INIT_LIST_HEAD(&dev->dev_sep_list);
764 INIT_LIST_HEAD(&dev->dev_tmr_list);
765 INIT_LIST_HEAD(&dev->delayed_cmd_list);
766 INIT_LIST_HEAD(&dev->qf_cmd_list);
767 spin_lock_init(&dev->delayed_cmd_lock);
768 spin_lock_init(&dev->dev_reservation_lock);
769 spin_lock_init(&dev->se_port_lock);
770 spin_lock_init(&dev->se_tmr_lock);
771 spin_lock_init(&dev->qf_cmd_lock);
772 sema_init(&dev->caw_sem, 1);
773 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list);
774 spin_lock_init(&dev->t10_wwn.t10_vpd_lock);
775 INIT_LIST_HEAD(&dev->t10_pr.registration_list);
776 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list);
777 spin_lock_init(&dev->t10_pr.registration_lock);
778 spin_lock_init(&dev->t10_pr.aptpl_reg_lock);
779 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list);
780 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock);
781 INIT_LIST_HEAD(&dev->t10_alua.lba_map_list);
782 spin_lock_init(&dev->t10_alua.lba_map_lock);
783
784 INIT_WORK(&dev->delayed_cmd_work, target_do_delayed_work);
785
786 dev->t10_wwn.t10_dev = dev;
787 /*
788 * Use OpenFabrics IEEE Company ID: 00 14 05
789 */
790 dev->t10_wwn.company_id = 0x001405;
791
792 dev->t10_alua.t10_dev = dev;
793
794 dev->dev_attrib.da_dev = dev;
795 dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS;
796 dev->dev_attrib.emulate_dpo = 1;
797 dev->dev_attrib.emulate_fua_write = 1;
798 dev->dev_attrib.emulate_fua_read = 1;
799 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
800 dev->dev_attrib.emulate_ua_intlck_ctrl = TARGET_UA_INTLCK_CTRL_CLEAR;
801 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS;
802 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU;
803 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
804 dev->dev_attrib.emulate_caw = DA_EMULATE_CAW;
805 dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC;
806 dev->dev_attrib.emulate_pr = DA_EMULATE_PR;
807 dev->dev_attrib.emulate_rsoc = DA_EMULATE_RSOC;
808 dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT;
809 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
810 dev->dev_attrib.force_pr_aptpl = DA_FORCE_PR_APTPL;
811 dev->dev_attrib.is_nonrot = DA_IS_NONROT;
812 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
813 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
814 dev->dev_attrib.max_unmap_block_desc_count =
815 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
816 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
817 dev->dev_attrib.unmap_granularity_alignment =
818 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
819 dev->dev_attrib.unmap_zeroes_data =
820 DA_UNMAP_ZEROES_DATA_DEFAULT;
821 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN;
822
823 xcopy_lun = &dev->xcopy_lun;
824 rcu_assign_pointer(xcopy_lun->lun_se_dev, dev);
825 init_completion(&xcopy_lun->lun_shutdown_comp);
826 INIT_LIST_HEAD(&xcopy_lun->lun_deve_list);
827 INIT_LIST_HEAD(&xcopy_lun->lun_dev_link);
828 mutex_init(&xcopy_lun->lun_tg_pt_md_mutex);
829 xcopy_lun->lun_tpg = &xcopy_pt_tpg;
830
831 /* Preload the default INQUIRY const values */
832 strlcpy(dev->t10_wwn.vendor, "LIO-ORG", sizeof(dev->t10_wwn.vendor));
833 strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod,
834 sizeof(dev->t10_wwn.model));
835 strlcpy(dev->t10_wwn.revision, dev->transport->inquiry_rev,
836 sizeof(dev->t10_wwn.revision));
837
838 return dev;
839}
840
841/*
842 * Check if the underlying struct block_device supports discard and if yes
843 * configure the UNMAP parameters.
844 */
845bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib,
846 struct block_device *bdev)
847{
848 int block_size = bdev_logical_block_size(bdev);
849
850 if (!bdev_max_discard_sectors(bdev))
851 return false;
852
853 attrib->max_unmap_lba_count =
854 bdev_max_discard_sectors(bdev) >> (ilog2(block_size) - 9);
855 /*
856 * Currently hardcoded to 1 in Linux/SCSI code..
857 */
858 attrib->max_unmap_block_desc_count = 1;
859 attrib->unmap_granularity = bdev_discard_granularity(bdev) / block_size;
860 attrib->unmap_granularity_alignment =
861 bdev_discard_alignment(bdev) / block_size;
862 return true;
863}
864EXPORT_SYMBOL(target_configure_unmap_from_queue);
865
866/*
867 * Convert from blocksize advertised to the initiator to the 512 byte
868 * units unconditionally used by the Linux block layer.
869 */
870sector_t target_to_linux_sector(struct se_device *dev, sector_t lb)
871{
872 switch (dev->dev_attrib.block_size) {
873 case 4096:
874 return lb << 3;
875 case 2048:
876 return lb << 2;
877 case 1024:
878 return lb << 1;
879 default:
880 return lb;
881 }
882}
883EXPORT_SYMBOL(target_to_linux_sector);
884
885struct devices_idr_iter {
886 struct config_item *prev_item;
887 int (*fn)(struct se_device *dev, void *data);
888 void *data;
889};
890
891static int target_devices_idr_iter(int id, void *p, void *data)
892 __must_hold(&device_mutex)
893{
894 struct devices_idr_iter *iter = data;
895 struct se_device *dev = p;
896 int ret;
897
898 config_item_put(iter->prev_item);
899 iter->prev_item = NULL;
900
901 /*
902 * We add the device early to the idr, so it can be used
903 * by backend modules during configuration. We do not want
904 * to allow other callers to access partially setup devices,
905 * so we skip them here.
906 */
907 if (!target_dev_configured(dev))
908 return 0;
909
910 iter->prev_item = config_item_get_unless_zero(&dev->dev_group.cg_item);
911 if (!iter->prev_item)
912 return 0;
913 mutex_unlock(&device_mutex);
914
915 ret = iter->fn(dev, iter->data);
916
917 mutex_lock(&device_mutex);
918 return ret;
919}
920
921/**
922 * target_for_each_device - iterate over configured devices
923 * @fn: iterator function
924 * @data: pointer to data that will be passed to fn
925 *
926 * fn must return 0 to continue looping over devices. non-zero will break
927 * from the loop and return that value to the caller.
928 */
929int target_for_each_device(int (*fn)(struct se_device *dev, void *data),
930 void *data)
931{
932 struct devices_idr_iter iter = { .fn = fn, .data = data };
933 int ret;
934
935 mutex_lock(&device_mutex);
936 ret = idr_for_each(&devices_idr, target_devices_idr_iter, &iter);
937 mutex_unlock(&device_mutex);
938 config_item_put(iter.prev_item);
939 return ret;
940}
941
942int target_configure_device(struct se_device *dev)
943{
944 struct se_hba *hba = dev->se_hba;
945 int ret, id;
946
947 if (target_dev_configured(dev)) {
948 pr_err("se_dev->se_dev_ptr already set for storage"
949 " object\n");
950 return -EEXIST;
951 }
952
953 /*
954 * Add early so modules like tcmu can use during its
955 * configuration.
956 */
957 mutex_lock(&device_mutex);
958 /*
959 * Use cyclic to try and avoid collisions with devices
960 * that were recently removed.
961 */
962 id = idr_alloc_cyclic(&devices_idr, dev, 0, INT_MAX, GFP_KERNEL);
963 mutex_unlock(&device_mutex);
964 if (id < 0) {
965 ret = -ENOMEM;
966 goto out;
967 }
968 dev->dev_index = id;
969
970 ret = dev->transport->configure_device(dev);
971 if (ret)
972 goto out_free_index;
973
974 if (dev->transport->configure_unmap &&
975 dev->transport->configure_unmap(dev)) {
976 pr_debug("Discard support available, but disabled by default.\n");
977 }
978
979 /*
980 * XXX: there is not much point to have two different values here..
981 */
982 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size;
983 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth;
984
985 /*
986 * Align max_hw_sectors down to PAGE_SIZE I/O transfers
987 */
988 dev->dev_attrib.hw_max_sectors =
989 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors,
990 dev->dev_attrib.hw_block_size);
991 dev->dev_attrib.optimal_sectors = dev->dev_attrib.hw_max_sectors;
992
993 dev->creation_time = get_jiffies_64();
994
995 ret = core_setup_alua(dev);
996 if (ret)
997 goto out_destroy_device;
998
999 /*
1000 * Setup work_queue for QUEUE_FULL
1001 */
1002 INIT_WORK(&dev->qf_work_queue, target_qf_do_work);
1003
1004 scsi_dump_inquiry(dev);
1005
1006 spin_lock(&hba->device_lock);
1007 hba->dev_count++;
1008 spin_unlock(&hba->device_lock);
1009
1010 dev->dev_flags |= DF_CONFIGURED;
1011
1012 return 0;
1013
1014out_destroy_device:
1015 dev->transport->destroy_device(dev);
1016out_free_index:
1017 mutex_lock(&device_mutex);
1018 idr_remove(&devices_idr, dev->dev_index);
1019 mutex_unlock(&device_mutex);
1020out:
1021 se_release_vpd_for_dev(dev);
1022 return ret;
1023}
1024
1025void target_free_device(struct se_device *dev)
1026{
1027 struct se_hba *hba = dev->se_hba;
1028
1029 WARN_ON(!list_empty(&dev->dev_sep_list));
1030
1031 if (target_dev_configured(dev)) {
1032 dev->transport->destroy_device(dev);
1033
1034 mutex_lock(&device_mutex);
1035 idr_remove(&devices_idr, dev->dev_index);
1036 mutex_unlock(&device_mutex);
1037
1038 spin_lock(&hba->device_lock);
1039 hba->dev_count--;
1040 spin_unlock(&hba->device_lock);
1041 }
1042
1043 core_alua_free_lu_gp_mem(dev);
1044 core_alua_set_lba_map(dev, NULL, 0, 0);
1045 core_scsi3_free_all_registrations(dev);
1046 se_release_vpd_for_dev(dev);
1047
1048 if (dev->transport->free_prot)
1049 dev->transport->free_prot(dev);
1050
1051 kfree(dev->queues);
1052 dev->transport->free_device(dev);
1053}
1054
1055int core_dev_setup_virtual_lun0(void)
1056{
1057 struct se_hba *hba;
1058 struct se_device *dev;
1059 char buf[] = "rd_pages=8,rd_nullio=1,rd_dummy=1";
1060 int ret;
1061
1062 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
1063 if (IS_ERR(hba))
1064 return PTR_ERR(hba);
1065
1066 dev = target_alloc_device(hba, "virt_lun0");
1067 if (!dev) {
1068 ret = -ENOMEM;
1069 goto out_free_hba;
1070 }
1071
1072 hba->backend->ops->set_configfs_dev_params(dev, buf, sizeof(buf));
1073
1074 ret = target_configure_device(dev);
1075 if (ret)
1076 goto out_free_se_dev;
1077
1078 lun0_hba = hba;
1079 g_lun0_dev = dev;
1080 return 0;
1081
1082out_free_se_dev:
1083 target_free_device(dev);
1084out_free_hba:
1085 core_delete_hba(hba);
1086 return ret;
1087}
1088
1089
1090void core_dev_release_virtual_lun0(void)
1091{
1092 struct se_hba *hba = lun0_hba;
1093
1094 if (!hba)
1095 return;
1096
1097 if (g_lun0_dev)
1098 target_free_device(g_lun0_dev);
1099 core_delete_hba(hba);
1100}
1101
1102/*
1103 * Common CDB parsing for kernel and user passthrough.
1104 */
1105sense_reason_t
1106passthrough_parse_cdb(struct se_cmd *cmd,
1107 sense_reason_t (*exec_cmd)(struct se_cmd *cmd))
1108{
1109 unsigned char *cdb = cmd->t_task_cdb;
1110 struct se_device *dev = cmd->se_dev;
1111 unsigned int size;
1112
1113 /*
1114 * For REPORT LUNS we always need to emulate the response, for everything
1115 * else, pass it up.
1116 */
1117 if (cdb[0] == REPORT_LUNS) {
1118 cmd->execute_cmd = spc_emulate_report_luns;
1119 return TCM_NO_SENSE;
1120 }
1121
1122 /*
1123 * With emulate_pr disabled, all reservation requests should fail,
1124 * regardless of whether or not TRANSPORT_FLAG_PASSTHROUGH_PGR is set.
1125 */
1126 if (!dev->dev_attrib.emulate_pr &&
1127 ((cdb[0] == PERSISTENT_RESERVE_IN) ||
1128 (cdb[0] == PERSISTENT_RESERVE_OUT) ||
1129 (cdb[0] == RELEASE || cdb[0] == RELEASE_10) ||
1130 (cdb[0] == RESERVE || cdb[0] == RESERVE_10))) {
1131 return TCM_UNSUPPORTED_SCSI_OPCODE;
1132 }
1133
1134 /*
1135 * For PERSISTENT RESERVE IN/OUT, RELEASE, and RESERVE we need to
1136 * emulate the response, since tcmu does not have the information
1137 * required to process these commands.
1138 */
1139 if (!(dev->transport_flags &
1140 TRANSPORT_FLAG_PASSTHROUGH_PGR)) {
1141 if (cdb[0] == PERSISTENT_RESERVE_IN) {
1142 cmd->execute_cmd = target_scsi3_emulate_pr_in;
1143 size = get_unaligned_be16(&cdb[7]);
1144 return target_cmd_size_check(cmd, size);
1145 }
1146 if (cdb[0] == PERSISTENT_RESERVE_OUT) {
1147 cmd->execute_cmd = target_scsi3_emulate_pr_out;
1148 size = get_unaligned_be32(&cdb[5]);
1149 return target_cmd_size_check(cmd, size);
1150 }
1151
1152 if (cdb[0] == RELEASE || cdb[0] == RELEASE_10) {
1153 cmd->execute_cmd = target_scsi2_reservation_release;
1154 if (cdb[0] == RELEASE_10)
1155 size = get_unaligned_be16(&cdb[7]);
1156 else
1157 size = cmd->data_length;
1158 return target_cmd_size_check(cmd, size);
1159 }
1160 if (cdb[0] == RESERVE || cdb[0] == RESERVE_10) {
1161 cmd->execute_cmd = target_scsi2_reservation_reserve;
1162 if (cdb[0] == RESERVE_10)
1163 size = get_unaligned_be16(&cdb[7]);
1164 else
1165 size = cmd->data_length;
1166 return target_cmd_size_check(cmd, size);
1167 }
1168 }
1169
1170 /* Set DATA_CDB flag for ops that should have it */
1171 switch (cdb[0]) {
1172 case READ_6:
1173 case READ_10:
1174 case READ_12:
1175 case READ_16:
1176 case WRITE_6:
1177 case WRITE_10:
1178 case WRITE_12:
1179 case WRITE_16:
1180 case WRITE_VERIFY:
1181 case WRITE_VERIFY_12:
1182 case WRITE_VERIFY_16:
1183 case COMPARE_AND_WRITE:
1184 case XDWRITEREAD_10:
1185 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1186 break;
1187 case VARIABLE_LENGTH_CMD:
1188 switch (get_unaligned_be16(&cdb[8])) {
1189 case READ_32:
1190 case WRITE_32:
1191 case WRITE_VERIFY_32:
1192 case XDWRITEREAD_32:
1193 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1194 break;
1195 }
1196 }
1197
1198 cmd->execute_cmd = exec_cmd;
1199
1200 return TCM_NO_SENSE;
1201}
1202EXPORT_SYMBOL(passthrough_parse_cdb);
1/*******************************************************************************
2 * Filename: target_core_device.c (based on iscsi_target_device.c)
3 *
4 * This file contains the TCM Virtual Device and Disk Transport
5 * agnostic related functions.
6 *
7 * (c) Copyright 2003-2013 Datera, Inc.
8 *
9 * Nicholas A. Bellinger <nab@kernel.org>
10 *
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.
15 *
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.
20 *
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.
24 *
25 ******************************************************************************/
26
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 <net/sock.h>
37#include <net/tcp.h>
38#include <scsi/scsi.h>
39#include <scsi/scsi_device.h>
40
41#include <target/target_core_base.h>
42#include <target/target_core_backend.h>
43#include <target/target_core_fabric.h>
44
45#include "target_core_internal.h"
46#include "target_core_alua.h"
47#include "target_core_pr.h"
48#include "target_core_ua.h"
49
50DEFINE_MUTEX(g_device_mutex);
51LIST_HEAD(g_device_list);
52
53static struct se_hba *lun0_hba;
54/* not static, needed by tpg.c */
55struct se_device *g_lun0_dev;
56
57sense_reason_t
58transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
59{
60 struct se_lun *se_lun = NULL;
61 struct se_session *se_sess = se_cmd->se_sess;
62 struct se_device *dev;
63 unsigned long flags;
64
65 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG)
66 return TCM_NON_EXISTENT_LUN;
67
68 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
69 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
70 if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
71 struct se_dev_entry *deve = se_cmd->se_deve;
72
73 deve->total_cmds++;
74
75 if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
76 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
77 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
78 " Access for 0x%08x\n",
79 se_cmd->se_tfo->get_fabric_name(),
80 unpacked_lun);
81 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
82 return TCM_WRITE_PROTECTED;
83 }
84
85 if (se_cmd->data_direction == DMA_TO_DEVICE)
86 deve->write_bytes += se_cmd->data_length;
87 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
88 deve->read_bytes += se_cmd->data_length;
89
90 se_lun = deve->se_lun;
91 se_cmd->se_lun = deve->se_lun;
92 se_cmd->pr_res_key = deve->pr_res_key;
93 se_cmd->orig_fe_lun = unpacked_lun;
94 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
95
96 percpu_ref_get(&se_lun->lun_ref);
97 se_cmd->lun_ref_active = true;
98 }
99 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
100
101 if (!se_lun) {
102 /*
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.
106 */
107 if (unpacked_lun != 0) {
108 pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
109 " Access for 0x%08x\n",
110 se_cmd->se_tfo->get_fabric_name(),
111 unpacked_lun);
112 return TCM_NON_EXISTENT_LUN;
113 }
114 /*
115 * Force WRITE PROTECT for virtual LUN 0
116 */
117 if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
118 (se_cmd->data_direction != DMA_NONE))
119 return TCM_WRITE_PROTECTED;
120
121 se_lun = &se_sess->se_tpg->tpg_virt_lun0;
122 se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
123 se_cmd->orig_fe_lun = 0;
124 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
125
126 percpu_ref_get(&se_lun->lun_ref);
127 se_cmd->lun_ref_active = true;
128 }
129
130 /* Directly associate cmd with se_dev */
131 se_cmd->se_dev = se_lun->lun_se_dev;
132
133 dev = se_lun->lun_se_dev;
134 atomic_long_inc(&dev->num_cmds);
135 if (se_cmd->data_direction == DMA_TO_DEVICE)
136 atomic_long_add(se_cmd->data_length, &dev->write_bytes);
137 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
138 atomic_long_add(se_cmd->data_length, &dev->read_bytes);
139
140 return 0;
141}
142EXPORT_SYMBOL(transport_lookup_cmd_lun);
143
144int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
145{
146 struct se_dev_entry *deve;
147 struct se_lun *se_lun = NULL;
148 struct se_session *se_sess = se_cmd->se_sess;
149 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
150 unsigned long flags;
151
152 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG)
153 return -ENODEV;
154
155 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
156 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
157 deve = se_cmd->se_deve;
158
159 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
160 se_tmr->tmr_lun = deve->se_lun;
161 se_cmd->se_lun = deve->se_lun;
162 se_lun = deve->se_lun;
163 se_cmd->pr_res_key = deve->pr_res_key;
164 se_cmd->orig_fe_lun = unpacked_lun;
165 }
166 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
167
168 if (!se_lun) {
169 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
170 " Access for 0x%08x\n",
171 se_cmd->se_tfo->get_fabric_name(),
172 unpacked_lun);
173 return -ENODEV;
174 }
175
176 /* Directly associate cmd with se_dev */
177 se_cmd->se_dev = se_lun->lun_se_dev;
178 se_tmr->tmr_dev = se_lun->lun_se_dev;
179
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);
183
184 return 0;
185}
186EXPORT_SYMBOL(transport_lookup_tmr_lun);
187
188/*
189 * This function is called from core_scsi3_emulate_pro_register_and_move()
190 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
191 * when a matching rtpi is found.
192 */
193struct se_dev_entry *core_get_se_deve_from_rtpi(
194 struct se_node_acl *nacl,
195 u16 rtpi)
196{
197 struct se_dev_entry *deve;
198 struct se_lun *lun;
199 struct se_port *port;
200 struct se_portal_group *tpg = nacl->se_tpg;
201 u32 i;
202
203 spin_lock_irq(&nacl->device_list_lock);
204 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
205 deve = nacl->device_list[i];
206
207 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
208 continue;
209
210 lun = deve->se_lun;
211 if (!lun) {
212 pr_err("%s device entries device pointer is"
213 " NULL, but Initiator has access.\n",
214 tpg->se_tpg_tfo->get_fabric_name());
215 continue;
216 }
217 port = lun->lun_sep;
218 if (!port) {
219 pr_err("%s device entries device pointer is"
220 " NULL, but Initiator has access.\n",
221 tpg->se_tpg_tfo->get_fabric_name());
222 continue;
223 }
224 if (port->sep_rtpi != rtpi)
225 continue;
226
227 atomic_inc(&deve->pr_ref_count);
228 smp_mb__after_atomic_inc();
229 spin_unlock_irq(&nacl->device_list_lock);
230
231 return deve;
232 }
233 spin_unlock_irq(&nacl->device_list_lock);
234
235 return NULL;
236}
237
238int core_free_device_list_for_node(
239 struct se_node_acl *nacl,
240 struct se_portal_group *tpg)
241{
242 struct se_dev_entry *deve;
243 struct se_lun *lun;
244 u32 i;
245
246 if (!nacl->device_list)
247 return 0;
248
249 spin_lock_irq(&nacl->device_list_lock);
250 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
251 deve = nacl->device_list[i];
252
253 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
254 continue;
255
256 if (!deve->se_lun) {
257 pr_err("%s device entries device pointer is"
258 " NULL, but Initiator has access.\n",
259 tpg->se_tpg_tfo->get_fabric_name());
260 continue;
261 }
262 lun = deve->se_lun;
263
264 spin_unlock_irq(&nacl->device_list_lock);
265 core_disable_device_list_for_node(lun, NULL, deve->mapped_lun,
266 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
267 spin_lock_irq(&nacl->device_list_lock);
268 }
269 spin_unlock_irq(&nacl->device_list_lock);
270
271 array_free(nacl->device_list, TRANSPORT_MAX_LUNS_PER_TPG);
272 nacl->device_list = NULL;
273
274 return 0;
275}
276
277void core_update_device_list_access(
278 u32 mapped_lun,
279 u32 lun_access,
280 struct se_node_acl *nacl)
281{
282 struct se_dev_entry *deve;
283
284 spin_lock_irq(&nacl->device_list_lock);
285 deve = nacl->device_list[mapped_lun];
286 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
287 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
288 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
289 } else {
290 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
291 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
292 }
293 spin_unlock_irq(&nacl->device_list_lock);
294}
295
296/* core_enable_device_list_for_node():
297 *
298 *
299 */
300int core_enable_device_list_for_node(
301 struct se_lun *lun,
302 struct se_lun_acl *lun_acl,
303 u32 mapped_lun,
304 u32 lun_access,
305 struct se_node_acl *nacl,
306 struct se_portal_group *tpg)
307{
308 struct se_port *port = lun->lun_sep;
309 struct se_dev_entry *deve;
310
311 spin_lock_irq(&nacl->device_list_lock);
312
313 deve = nacl->device_list[mapped_lun];
314
315 /*
316 * Check if the call is handling demo mode -> explicit LUN ACL
317 * transition. This transition must be for the same struct se_lun
318 * + mapped_lun that was setup in demo mode..
319 */
320 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
321 if (deve->se_lun_acl != NULL) {
322 pr_err("struct se_dev_entry->se_lun_acl"
323 " already set for demo mode -> explicit"
324 " LUN ACL transition\n");
325 spin_unlock_irq(&nacl->device_list_lock);
326 return -EINVAL;
327 }
328 if (deve->se_lun != lun) {
329 pr_err("struct se_dev_entry->se_lun does"
330 " match passed struct se_lun for demo mode"
331 " -> explicit LUN ACL transition\n");
332 spin_unlock_irq(&nacl->device_list_lock);
333 return -EINVAL;
334 }
335 deve->se_lun_acl = lun_acl;
336
337 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
338 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
339 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
340 } else {
341 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
342 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
343 }
344
345 spin_unlock_irq(&nacl->device_list_lock);
346 return 0;
347 }
348
349 deve->se_lun = lun;
350 deve->se_lun_acl = lun_acl;
351 deve->mapped_lun = mapped_lun;
352 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
353
354 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
355 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
356 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
357 } else {
358 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
359 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
360 }
361
362 deve->creation_time = get_jiffies_64();
363 deve->attach_count++;
364 spin_unlock_irq(&nacl->device_list_lock);
365
366 spin_lock_bh(&port->sep_alua_lock);
367 list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
368 spin_unlock_bh(&port->sep_alua_lock);
369
370 return 0;
371}
372
373/* core_disable_device_list_for_node():
374 *
375 *
376 */
377int core_disable_device_list_for_node(
378 struct se_lun *lun,
379 struct se_lun_acl *lun_acl,
380 u32 mapped_lun,
381 u32 lun_access,
382 struct se_node_acl *nacl,
383 struct se_portal_group *tpg)
384{
385 struct se_port *port = lun->lun_sep;
386 struct se_dev_entry *deve = nacl->device_list[mapped_lun];
387
388 /*
389 * If the MappedLUN entry is being disabled, the entry in
390 * port->sep_alua_list must be removed now before clearing the
391 * struct se_dev_entry pointers below as logic in
392 * core_alua_do_transition_tg_pt() depends on these being present.
393 *
394 * deve->se_lun_acl will be NULL for demo-mode created LUNs
395 * that have not been explicitly converted to MappedLUNs ->
396 * struct se_lun_acl, but we remove deve->alua_port_list from
397 * port->sep_alua_list. This also means that active UAs and
398 * NodeACL context specific PR metadata for demo-mode
399 * MappedLUN *deve will be released below..
400 */
401 spin_lock_bh(&port->sep_alua_lock);
402 list_del(&deve->alua_port_list);
403 spin_unlock_bh(&port->sep_alua_lock);
404 /*
405 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
406 * PR operation to complete.
407 */
408 while (atomic_read(&deve->pr_ref_count) != 0)
409 cpu_relax();
410
411 spin_lock_irq(&nacl->device_list_lock);
412 /*
413 * Disable struct se_dev_entry LUN ACL mapping
414 */
415 core_scsi3_ua_release_all(deve);
416 deve->se_lun = NULL;
417 deve->se_lun_acl = NULL;
418 deve->lun_flags = 0;
419 deve->creation_time = 0;
420 deve->attach_count--;
421 spin_unlock_irq(&nacl->device_list_lock);
422
423 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
424 return 0;
425}
426
427/* core_clear_lun_from_tpg():
428 *
429 *
430 */
431void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
432{
433 struct se_node_acl *nacl;
434 struct se_dev_entry *deve;
435 u32 i;
436
437 spin_lock_irq(&tpg->acl_node_lock);
438 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
439 spin_unlock_irq(&tpg->acl_node_lock);
440
441 spin_lock_irq(&nacl->device_list_lock);
442 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
443 deve = nacl->device_list[i];
444 if (lun != deve->se_lun)
445 continue;
446 spin_unlock_irq(&nacl->device_list_lock);
447
448 core_disable_device_list_for_node(lun, NULL,
449 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
450 nacl, tpg);
451
452 spin_lock_irq(&nacl->device_list_lock);
453 }
454 spin_unlock_irq(&nacl->device_list_lock);
455
456 spin_lock_irq(&tpg->acl_node_lock);
457 }
458 spin_unlock_irq(&tpg->acl_node_lock);
459}
460
461static struct se_port *core_alloc_port(struct se_device *dev)
462{
463 struct se_port *port, *port_tmp;
464
465 port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
466 if (!port) {
467 pr_err("Unable to allocate struct se_port\n");
468 return ERR_PTR(-ENOMEM);
469 }
470 INIT_LIST_HEAD(&port->sep_alua_list);
471 INIT_LIST_HEAD(&port->sep_list);
472 atomic_set(&port->sep_tg_pt_secondary_offline, 0);
473 spin_lock_init(&port->sep_alua_lock);
474 mutex_init(&port->sep_tg_pt_md_mutex);
475
476 spin_lock(&dev->se_port_lock);
477 if (dev->dev_port_count == 0x0000ffff) {
478 pr_warn("Reached dev->dev_port_count =="
479 " 0x0000ffff\n");
480 spin_unlock(&dev->se_port_lock);
481 return ERR_PTR(-ENOSPC);
482 }
483again:
484 /*
485 * Allocate the next RELATIVE TARGET PORT IDENTIFIER for this struct se_device
486 * Here is the table from spc4r17 section 7.7.3.8.
487 *
488 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
489 *
490 * Code Description
491 * 0h Reserved
492 * 1h Relative port 1, historically known as port A
493 * 2h Relative port 2, historically known as port B
494 * 3h to FFFFh Relative port 3 through 65 535
495 */
496 port->sep_rtpi = dev->dev_rpti_counter++;
497 if (!port->sep_rtpi)
498 goto again;
499
500 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
501 /*
502 * Make sure RELATIVE TARGET PORT IDENTIFIER is unique
503 * for 16-bit wrap..
504 */
505 if (port->sep_rtpi == port_tmp->sep_rtpi)
506 goto again;
507 }
508 spin_unlock(&dev->se_port_lock);
509
510 return port;
511}
512
513static void core_export_port(
514 struct se_device *dev,
515 struct se_portal_group *tpg,
516 struct se_port *port,
517 struct se_lun *lun)
518{
519 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
520
521 spin_lock(&dev->se_port_lock);
522 spin_lock(&lun->lun_sep_lock);
523 port->sep_tpg = tpg;
524 port->sep_lun = lun;
525 lun->lun_sep = port;
526 spin_unlock(&lun->lun_sep_lock);
527
528 list_add_tail(&port->sep_list, &dev->dev_sep_list);
529 spin_unlock(&dev->se_port_lock);
530
531 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV &&
532 !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) {
533 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
534 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
535 pr_err("Unable to allocate t10_alua_tg_pt"
536 "_gp_member_t\n");
537 return;
538 }
539 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
540 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
541 dev->t10_alua.default_tg_pt_gp);
542 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
543 pr_debug("%s/%s: Adding to default ALUA Target Port"
544 " Group: alua/default_tg_pt_gp\n",
545 dev->transport->name, tpg->se_tpg_tfo->get_fabric_name());
546 }
547
548 dev->dev_port_count++;
549 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFIER */
550}
551
552/*
553 * Called with struct se_device->se_port_lock spinlock held.
554 */
555static void core_release_port(struct se_device *dev, struct se_port *port)
556 __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock)
557{
558 /*
559 * Wait for any port reference for PR ALL_TG_PT=1 operation
560 * to complete in __core_scsi3_alloc_registration()
561 */
562 spin_unlock(&dev->se_port_lock);
563 if (atomic_read(&port->sep_tg_pt_ref_cnt))
564 cpu_relax();
565 spin_lock(&dev->se_port_lock);
566
567 core_alua_free_tg_pt_gp_mem(port);
568
569 list_del(&port->sep_list);
570 dev->dev_port_count--;
571 kfree(port);
572}
573
574int core_dev_export(
575 struct se_device *dev,
576 struct se_portal_group *tpg,
577 struct se_lun *lun)
578{
579 struct se_hba *hba = dev->se_hba;
580 struct se_port *port;
581
582 port = core_alloc_port(dev);
583 if (IS_ERR(port))
584 return PTR_ERR(port);
585
586 lun->lun_se_dev = dev;
587
588 spin_lock(&hba->device_lock);
589 dev->export_count++;
590 spin_unlock(&hba->device_lock);
591
592 core_export_port(dev, tpg, port, lun);
593 return 0;
594}
595
596void core_dev_unexport(
597 struct se_device *dev,
598 struct se_portal_group *tpg,
599 struct se_lun *lun)
600{
601 struct se_hba *hba = dev->se_hba;
602 struct se_port *port = lun->lun_sep;
603
604 spin_lock(&lun->lun_sep_lock);
605 if (lun->lun_se_dev == NULL) {
606 spin_unlock(&lun->lun_sep_lock);
607 return;
608 }
609 spin_unlock(&lun->lun_sep_lock);
610
611 spin_lock(&dev->se_port_lock);
612 core_release_port(dev, port);
613 spin_unlock(&dev->se_port_lock);
614
615 spin_lock(&hba->device_lock);
616 dev->export_count--;
617 spin_unlock(&hba->device_lock);
618
619 lun->lun_se_dev = NULL;
620}
621
622static void se_release_vpd_for_dev(struct se_device *dev)
623{
624 struct t10_vpd *vpd, *vpd_tmp;
625
626 spin_lock(&dev->t10_wwn.t10_vpd_lock);
627 list_for_each_entry_safe(vpd, vpd_tmp,
628 &dev->t10_wwn.t10_vpd_list, vpd_list) {
629 list_del(&vpd->vpd_list);
630 kfree(vpd);
631 }
632 spin_unlock(&dev->t10_wwn.t10_vpd_lock);
633}
634
635static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
636{
637 u32 aligned_max_sectors;
638 u32 alignment;
639 /*
640 * Limit max_sectors to a PAGE_SIZE aligned value for modern
641 * transport_allocate_data_tasks() operation.
642 */
643 alignment = max(1ul, PAGE_SIZE / block_size);
644 aligned_max_sectors = rounddown(max_sectors, alignment);
645
646 if (max_sectors != aligned_max_sectors)
647 pr_info("Rounding down aligned max_sectors from %u to %u\n",
648 max_sectors, aligned_max_sectors);
649
650 return aligned_max_sectors;
651}
652
653int se_dev_set_max_unmap_lba_count(
654 struct se_device *dev,
655 u32 max_unmap_lba_count)
656{
657 dev->dev_attrib.max_unmap_lba_count = max_unmap_lba_count;
658 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n",
659 dev, dev->dev_attrib.max_unmap_lba_count);
660 return 0;
661}
662
663int se_dev_set_max_unmap_block_desc_count(
664 struct se_device *dev,
665 u32 max_unmap_block_desc_count)
666{
667 dev->dev_attrib.max_unmap_block_desc_count =
668 max_unmap_block_desc_count;
669 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
670 dev, dev->dev_attrib.max_unmap_block_desc_count);
671 return 0;
672}
673
674int se_dev_set_unmap_granularity(
675 struct se_device *dev,
676 u32 unmap_granularity)
677{
678 dev->dev_attrib.unmap_granularity = unmap_granularity;
679 pr_debug("dev[%p]: Set unmap_granularity: %u\n",
680 dev, dev->dev_attrib.unmap_granularity);
681 return 0;
682}
683
684int se_dev_set_unmap_granularity_alignment(
685 struct se_device *dev,
686 u32 unmap_granularity_alignment)
687{
688 dev->dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
689 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
690 dev, dev->dev_attrib.unmap_granularity_alignment);
691 return 0;
692}
693
694int se_dev_set_max_write_same_len(
695 struct se_device *dev,
696 u32 max_write_same_len)
697{
698 dev->dev_attrib.max_write_same_len = max_write_same_len;
699 pr_debug("dev[%p]: Set max_write_same_len: %u\n",
700 dev, dev->dev_attrib.max_write_same_len);
701 return 0;
702}
703
704static void dev_set_t10_wwn_model_alias(struct se_device *dev)
705{
706 const char *configname;
707
708 configname = config_item_name(&dev->dev_group.cg_item);
709 if (strlen(configname) >= 16) {
710 pr_warn("dev[%p]: Backstore name '%s' is too long for "
711 "INQUIRY_MODEL, truncating to 16 bytes\n", dev,
712 configname);
713 }
714 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname);
715}
716
717int se_dev_set_emulate_model_alias(struct se_device *dev, int flag)
718{
719 if (dev->export_count) {
720 pr_err("dev[%p]: Unable to change model alias"
721 " while export_count is %d\n",
722 dev, dev->export_count);
723 return -EINVAL;
724 }
725
726 if (flag != 0 && flag != 1) {
727 pr_err("Illegal value %d\n", flag);
728 return -EINVAL;
729 }
730
731 if (flag) {
732 dev_set_t10_wwn_model_alias(dev);
733 } else {
734 strncpy(&dev->t10_wwn.model[0],
735 dev->transport->inquiry_prod, 16);
736 }
737 dev->dev_attrib.emulate_model_alias = flag;
738
739 return 0;
740}
741
742int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
743{
744 if (flag != 0 && flag != 1) {
745 pr_err("Illegal value %d\n", flag);
746 return -EINVAL;
747 }
748
749 if (flag) {
750 pr_err("dpo_emulated not supported\n");
751 return -EINVAL;
752 }
753
754 return 0;
755}
756
757int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
758{
759 if (flag != 0 && flag != 1) {
760 pr_err("Illegal value %d\n", flag);
761 return -EINVAL;
762 }
763
764 if (flag &&
765 dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
766 pr_err("emulate_fua_write not supported for pSCSI\n");
767 return -EINVAL;
768 }
769 dev->dev_attrib.emulate_fua_write = flag;
770 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
771 dev, dev->dev_attrib.emulate_fua_write);
772 return 0;
773}
774
775int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
776{
777 if (flag != 0 && flag != 1) {
778 pr_err("Illegal value %d\n", flag);
779 return -EINVAL;
780 }
781
782 if (flag) {
783 pr_err("ua read emulated not supported\n");
784 return -EINVAL;
785 }
786
787 return 0;
788}
789
790int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
791{
792 if (flag != 0 && flag != 1) {
793 pr_err("Illegal value %d\n", flag);
794 return -EINVAL;
795 }
796 if (flag &&
797 dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
798 pr_err("emulate_write_cache not supported for pSCSI\n");
799 return -EINVAL;
800 }
801 if (flag &&
802 dev->transport->get_write_cache) {
803 pr_err("emulate_write_cache not supported for this device\n");
804 return -EINVAL;
805 }
806
807 dev->dev_attrib.emulate_write_cache = flag;
808 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
809 dev, dev->dev_attrib.emulate_write_cache);
810 return 0;
811}
812
813int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
814{
815 if ((flag != 0) && (flag != 1) && (flag != 2)) {
816 pr_err("Illegal value %d\n", flag);
817 return -EINVAL;
818 }
819
820 if (dev->export_count) {
821 pr_err("dev[%p]: Unable to change SE Device"
822 " UA_INTRLCK_CTRL while export_count is %d\n",
823 dev, dev->export_count);
824 return -EINVAL;
825 }
826 dev->dev_attrib.emulate_ua_intlck_ctrl = flag;
827 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
828 dev, dev->dev_attrib.emulate_ua_intlck_ctrl);
829
830 return 0;
831}
832
833int se_dev_set_emulate_tas(struct se_device *dev, int flag)
834{
835 if ((flag != 0) && (flag != 1)) {
836 pr_err("Illegal value %d\n", flag);
837 return -EINVAL;
838 }
839
840 if (dev->export_count) {
841 pr_err("dev[%p]: Unable to change SE Device TAS while"
842 " export_count is %d\n",
843 dev, dev->export_count);
844 return -EINVAL;
845 }
846 dev->dev_attrib.emulate_tas = flag;
847 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
848 dev, (dev->dev_attrib.emulate_tas) ? "Enabled" : "Disabled");
849
850 return 0;
851}
852
853int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
854{
855 if ((flag != 0) && (flag != 1)) {
856 pr_err("Illegal value %d\n", flag);
857 return -EINVAL;
858 }
859 /*
860 * We expect this value to be non-zero when generic Block Layer
861 * Discard supported is detected iblock_create_virtdevice().
862 */
863 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) {
864 pr_err("Generic Block Discard not supported\n");
865 return -ENOSYS;
866 }
867
868 dev->dev_attrib.emulate_tpu = flag;
869 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
870 dev, flag);
871 return 0;
872}
873
874int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
875{
876 if ((flag != 0) && (flag != 1)) {
877 pr_err("Illegal value %d\n", flag);
878 return -EINVAL;
879 }
880 /*
881 * We expect this value to be non-zero when generic Block Layer
882 * Discard supported is detected iblock_create_virtdevice().
883 */
884 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) {
885 pr_err("Generic Block Discard not supported\n");
886 return -ENOSYS;
887 }
888
889 dev->dev_attrib.emulate_tpws = flag;
890 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
891 dev, flag);
892 return 0;
893}
894
895int se_dev_set_emulate_caw(struct se_device *dev, int flag)
896{
897 if (flag != 0 && flag != 1) {
898 pr_err("Illegal value %d\n", flag);
899 return -EINVAL;
900 }
901 dev->dev_attrib.emulate_caw = flag;
902 pr_debug("dev[%p]: SE Device CompareAndWrite (AtomicTestandSet): %d\n",
903 dev, flag);
904
905 return 0;
906}
907
908int se_dev_set_emulate_3pc(struct se_device *dev, int flag)
909{
910 if (flag != 0 && flag != 1) {
911 pr_err("Illegal value %d\n", flag);
912 return -EINVAL;
913 }
914 dev->dev_attrib.emulate_3pc = flag;
915 pr_debug("dev[%p]: SE Device 3rd Party Copy (EXTENDED_COPY): %d\n",
916 dev, flag);
917
918 return 0;
919}
920
921int se_dev_set_pi_prot_type(struct se_device *dev, int flag)
922{
923 int rc, old_prot = dev->dev_attrib.pi_prot_type;
924
925 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
926 pr_err("Illegal value %d for pi_prot_type\n", flag);
927 return -EINVAL;
928 }
929 if (flag == 2) {
930 pr_err("DIF TYPE2 protection currently not supported\n");
931 return -ENOSYS;
932 }
933 if (dev->dev_attrib.hw_pi_prot_type) {
934 pr_warn("DIF protection enabled on underlying hardware,"
935 " ignoring\n");
936 return 0;
937 }
938 if (!dev->transport->init_prot || !dev->transport->free_prot) {
939 /* 0 is only allowed value for non-supporting backends */
940 if (flag == 0)
941 return 0;
942
943 pr_err("DIF protection not supported by backend: %s\n",
944 dev->transport->name);
945 return -ENOSYS;
946 }
947 if (!(dev->dev_flags & DF_CONFIGURED)) {
948 pr_err("DIF protection requires device to be configured\n");
949 return -ENODEV;
950 }
951 if (dev->export_count) {
952 pr_err("dev[%p]: Unable to change SE Device PROT type while"
953 " export_count is %d\n", dev, dev->export_count);
954 return -EINVAL;
955 }
956
957 dev->dev_attrib.pi_prot_type = flag;
958
959 if (flag && !old_prot) {
960 rc = dev->transport->init_prot(dev);
961 if (rc) {
962 dev->dev_attrib.pi_prot_type = old_prot;
963 return rc;
964 }
965
966 } else if (!flag && old_prot) {
967 dev->transport->free_prot(dev);
968 }
969 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
970
971 return 0;
972}
973
974int se_dev_set_pi_prot_format(struct se_device *dev, int flag)
975{
976 int rc;
977
978 if (!flag)
979 return 0;
980
981 if (flag != 1) {
982 pr_err("Illegal value %d for pi_prot_format\n", flag);
983 return -EINVAL;
984 }
985 if (!dev->transport->format_prot) {
986 pr_err("DIF protection format not supported by backend %s\n",
987 dev->transport->name);
988 return -ENOSYS;
989 }
990 if (!(dev->dev_flags & DF_CONFIGURED)) {
991 pr_err("DIF protection format requires device to be configured\n");
992 return -ENODEV;
993 }
994 if (dev->export_count) {
995 pr_err("dev[%p]: Unable to format SE Device PROT type while"
996 " export_count is %d\n", dev, dev->export_count);
997 return -EINVAL;
998 }
999
1000 rc = dev->transport->format_prot(dev);
1001 if (rc)
1002 return rc;
1003
1004 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
1005
1006 return 0;
1007}
1008
1009int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
1010{
1011 if ((flag != 0) && (flag != 1)) {
1012 pr_err("Illegal value %d\n", flag);
1013 return -EINVAL;
1014 }
1015 dev->dev_attrib.enforce_pr_isids = flag;
1016 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
1017 (dev->dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
1018 return 0;
1019}
1020
1021int se_dev_set_is_nonrot(struct se_device *dev, int flag)
1022{
1023 if ((flag != 0) && (flag != 1)) {
1024 printk(KERN_ERR "Illegal value %d\n", flag);
1025 return -EINVAL;
1026 }
1027 dev->dev_attrib.is_nonrot = flag;
1028 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
1029 dev, flag);
1030 return 0;
1031}
1032
1033int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
1034{
1035 if (flag != 0) {
1036 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted"
1037 " reordering not implemented\n", dev);
1038 return -ENOSYS;
1039 }
1040 dev->dev_attrib.emulate_rest_reord = flag;
1041 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
1042 return 0;
1043}
1044
1045/*
1046 * Note, this can only be called on unexported SE Device Object.
1047 */
1048int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
1049{
1050 if (dev->export_count) {
1051 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1052 " export_count is %d\n",
1053 dev, dev->export_count);
1054 return -EINVAL;
1055 }
1056 if (!queue_depth) {
1057 pr_err("dev[%p]: Illegal ZERO value for queue"
1058 "_depth\n", dev);
1059 return -EINVAL;
1060 }
1061
1062 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1063 if (queue_depth > dev->dev_attrib.hw_queue_depth) {
1064 pr_err("dev[%p]: Passed queue_depth: %u"
1065 " exceeds TCM/SE_Device TCQ: %u\n",
1066 dev, queue_depth,
1067 dev->dev_attrib.hw_queue_depth);
1068 return -EINVAL;
1069 }
1070 } else {
1071 if (queue_depth > dev->dev_attrib.queue_depth) {
1072 if (queue_depth > dev->dev_attrib.hw_queue_depth) {
1073 pr_err("dev[%p]: Passed queue_depth:"
1074 " %u exceeds TCM/SE_Device MAX"
1075 " TCQ: %u\n", dev, queue_depth,
1076 dev->dev_attrib.hw_queue_depth);
1077 return -EINVAL;
1078 }
1079 }
1080 }
1081
1082 dev->dev_attrib.queue_depth = dev->queue_depth = queue_depth;
1083 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
1084 dev, queue_depth);
1085 return 0;
1086}
1087
1088int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
1089{
1090 int block_size = dev->dev_attrib.block_size;
1091
1092 if (dev->export_count) {
1093 pr_err("dev[%p]: Unable to change SE Device"
1094 " fabric_max_sectors while export_count is %d\n",
1095 dev, dev->export_count);
1096 return -EINVAL;
1097 }
1098 if (!fabric_max_sectors) {
1099 pr_err("dev[%p]: Illegal ZERO value for"
1100 " fabric_max_sectors\n", dev);
1101 return -EINVAL;
1102 }
1103 if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
1104 pr_err("dev[%p]: Passed fabric_max_sectors: %u less than"
1105 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors,
1106 DA_STATUS_MAX_SECTORS_MIN);
1107 return -EINVAL;
1108 }
1109 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1110 if (fabric_max_sectors > dev->dev_attrib.hw_max_sectors) {
1111 pr_err("dev[%p]: Passed fabric_max_sectors: %u"
1112 " greater than TCM/SE_Device max_sectors:"
1113 " %u\n", dev, fabric_max_sectors,
1114 dev->dev_attrib.hw_max_sectors);
1115 return -EINVAL;
1116 }
1117 } else {
1118 if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
1119 pr_err("dev[%p]: Passed fabric_max_sectors: %u"
1120 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1121 " %u\n", dev, fabric_max_sectors,
1122 DA_STATUS_MAX_SECTORS_MAX);
1123 return -EINVAL;
1124 }
1125 }
1126 /*
1127 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
1128 */
1129 if (!block_size) {
1130 block_size = 512;
1131 pr_warn("Defaulting to 512 for zero block_size\n");
1132 }
1133 fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors,
1134 block_size);
1135
1136 dev->dev_attrib.fabric_max_sectors = fabric_max_sectors;
1137 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
1138 dev, fabric_max_sectors);
1139 return 0;
1140}
1141
1142int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
1143{
1144 if (dev->export_count) {
1145 pr_err("dev[%p]: Unable to change SE Device"
1146 " optimal_sectors while export_count is %d\n",
1147 dev, dev->export_count);
1148 return -EINVAL;
1149 }
1150 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1151 pr_err("dev[%p]: Passed optimal_sectors cannot be"
1152 " changed for TCM/pSCSI\n", dev);
1153 return -EINVAL;
1154 }
1155 if (optimal_sectors > dev->dev_attrib.fabric_max_sectors) {
1156 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1157 " greater than fabric_max_sectors: %u\n", dev,
1158 optimal_sectors, dev->dev_attrib.fabric_max_sectors);
1159 return -EINVAL;
1160 }
1161
1162 dev->dev_attrib.optimal_sectors = optimal_sectors;
1163 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1164 dev, optimal_sectors);
1165 return 0;
1166}
1167
1168int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1169{
1170 if (dev->export_count) {
1171 pr_err("dev[%p]: Unable to change SE Device block_size"
1172 " while export_count is %d\n",
1173 dev, dev->export_count);
1174 return -EINVAL;
1175 }
1176
1177 if ((block_size != 512) &&
1178 (block_size != 1024) &&
1179 (block_size != 2048) &&
1180 (block_size != 4096)) {
1181 pr_err("dev[%p]: Illegal value for block_device: %u"
1182 " for SE device, must be 512, 1024, 2048 or 4096\n",
1183 dev, block_size);
1184 return -EINVAL;
1185 }
1186
1187 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1188 pr_err("dev[%p]: Not allowed to change block_size for"
1189 " Physical Device, use for Linux/SCSI to change"
1190 " block_size for underlying hardware\n", dev);
1191 return -EINVAL;
1192 }
1193
1194 dev->dev_attrib.block_size = block_size;
1195 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1196 dev, block_size);
1197
1198 if (dev->dev_attrib.max_bytes_per_io)
1199 dev->dev_attrib.hw_max_sectors =
1200 dev->dev_attrib.max_bytes_per_io / block_size;
1201
1202 return 0;
1203}
1204
1205struct se_lun *core_dev_add_lun(
1206 struct se_portal_group *tpg,
1207 struct se_device *dev,
1208 u32 unpacked_lun)
1209{
1210 struct se_lun *lun;
1211 int rc;
1212
1213 lun = core_tpg_alloc_lun(tpg, unpacked_lun);
1214 if (IS_ERR(lun))
1215 return lun;
1216
1217 rc = core_tpg_add_lun(tpg, lun,
1218 TRANSPORT_LUNFLAGS_READ_WRITE, dev);
1219 if (rc < 0)
1220 return ERR_PTR(rc);
1221
1222 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1223 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1224 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1225 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id);
1226 /*
1227 * Update LUN maps for dynamically added initiators when
1228 * generate_node_acl is enabled.
1229 */
1230 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
1231 struct se_node_acl *acl;
1232 spin_lock_irq(&tpg->acl_node_lock);
1233 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
1234 if (acl->dynamic_node_acl &&
1235 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
1236 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
1237 spin_unlock_irq(&tpg->acl_node_lock);
1238 core_tpg_add_node_to_devs(acl, tpg);
1239 spin_lock_irq(&tpg->acl_node_lock);
1240 }
1241 }
1242 spin_unlock_irq(&tpg->acl_node_lock);
1243 }
1244
1245 return lun;
1246}
1247
1248/* core_dev_del_lun():
1249 *
1250 *
1251 */
1252int core_dev_del_lun(
1253 struct se_portal_group *tpg,
1254 u32 unpacked_lun)
1255{
1256 struct se_lun *lun;
1257
1258 lun = core_tpg_pre_dellun(tpg, unpacked_lun);
1259 if (IS_ERR(lun))
1260 return PTR_ERR(lun);
1261
1262 core_tpg_post_dellun(tpg, lun);
1263
1264 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
1265 " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
1266 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun,
1267 tpg->se_tpg_tfo->get_fabric_name());
1268
1269 return 0;
1270}
1271
1272struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1273{
1274 struct se_lun *lun;
1275
1276 spin_lock(&tpg->tpg_lun_lock);
1277 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1278 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1279 "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1280 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1281 TRANSPORT_MAX_LUNS_PER_TPG-1,
1282 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1283 spin_unlock(&tpg->tpg_lun_lock);
1284 return NULL;
1285 }
1286 lun = tpg->tpg_lun_list[unpacked_lun];
1287
1288 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
1289 pr_err("%s Logical Unit Number: %u is not free on"
1290 " Target Portal Group: %hu, ignoring request.\n",
1291 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1292 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1293 spin_unlock(&tpg->tpg_lun_lock);
1294 return NULL;
1295 }
1296 spin_unlock(&tpg->tpg_lun_lock);
1297
1298 return lun;
1299}
1300
1301/* core_dev_get_lun():
1302 *
1303 *
1304 */
1305static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1306{
1307 struct se_lun *lun;
1308
1309 spin_lock(&tpg->tpg_lun_lock);
1310 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1311 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1312 "_TPG-1: %u for Target Portal Group: %hu\n",
1313 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1314 TRANSPORT_MAX_LUNS_PER_TPG-1,
1315 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1316 spin_unlock(&tpg->tpg_lun_lock);
1317 return NULL;
1318 }
1319 lun = tpg->tpg_lun_list[unpacked_lun];
1320
1321 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
1322 pr_err("%s Logical Unit Number: %u is not active on"
1323 " Target Portal Group: %hu, ignoring request.\n",
1324 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1325 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1326 spin_unlock(&tpg->tpg_lun_lock);
1327 return NULL;
1328 }
1329 spin_unlock(&tpg->tpg_lun_lock);
1330
1331 return lun;
1332}
1333
1334struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1335 struct se_portal_group *tpg,
1336 struct se_node_acl *nacl,
1337 u32 mapped_lun,
1338 int *ret)
1339{
1340 struct se_lun_acl *lacl;
1341
1342 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) {
1343 pr_err("%s InitiatorName exceeds maximum size.\n",
1344 tpg->se_tpg_tfo->get_fabric_name());
1345 *ret = -EOVERFLOW;
1346 return NULL;
1347 }
1348 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
1349 if (!lacl) {
1350 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
1351 *ret = -ENOMEM;
1352 return NULL;
1353 }
1354
1355 INIT_LIST_HEAD(&lacl->lacl_list);
1356 lacl->mapped_lun = mapped_lun;
1357 lacl->se_lun_nacl = nacl;
1358 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s",
1359 nacl->initiatorname);
1360
1361 return lacl;
1362}
1363
1364int core_dev_add_initiator_node_lun_acl(
1365 struct se_portal_group *tpg,
1366 struct se_lun_acl *lacl,
1367 u32 unpacked_lun,
1368 u32 lun_access)
1369{
1370 struct se_lun *lun;
1371 struct se_node_acl *nacl;
1372
1373 lun = core_dev_get_lun(tpg, unpacked_lun);
1374 if (!lun) {
1375 pr_err("%s Logical Unit Number: %u is not active on"
1376 " Target Portal Group: %hu, ignoring request.\n",
1377 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1378 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1379 return -EINVAL;
1380 }
1381
1382 nacl = lacl->se_lun_nacl;
1383 if (!nacl)
1384 return -EINVAL;
1385
1386 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1387 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1388 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1389
1390 lacl->se_lun = lun;
1391
1392 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun,
1393 lun_access, nacl, tpg) < 0)
1394 return -EINVAL;
1395
1396 spin_lock(&lun->lun_acl_lock);
1397 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
1398 atomic_inc(&lun->lun_acl_count);
1399 smp_mb__after_atomic_inc();
1400 spin_unlock(&lun->lun_acl_lock);
1401
1402 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1403 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
1404 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
1405 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1406 lacl->initiatorname);
1407 /*
1408 * Check to see if there are any existing persistent reservation APTPL
1409 * pre-registrations that need to be enabled for this LUN ACL..
1410 */
1411 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
1412 return 0;
1413}
1414
1415/* core_dev_del_initiator_node_lun_acl():
1416 *
1417 *
1418 */
1419int core_dev_del_initiator_node_lun_acl(
1420 struct se_portal_group *tpg,
1421 struct se_lun *lun,
1422 struct se_lun_acl *lacl)
1423{
1424 struct se_node_acl *nacl;
1425
1426 nacl = lacl->se_lun_nacl;
1427 if (!nacl)
1428 return -EINVAL;
1429
1430 spin_lock(&lun->lun_acl_lock);
1431 list_del(&lacl->lacl_list);
1432 atomic_dec(&lun->lun_acl_count);
1433 smp_mb__after_atomic_dec();
1434 spin_unlock(&lun->lun_acl_lock);
1435
1436 core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun,
1437 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
1438
1439 lacl->se_lun = NULL;
1440
1441 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1442 " InitiatorNode: %s Mapped LUN: %u\n",
1443 tpg->se_tpg_tfo->get_fabric_name(),
1444 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1445 lacl->initiatorname, lacl->mapped_lun);
1446
1447 return 0;
1448}
1449
1450void core_dev_free_initiator_node_lun_acl(
1451 struct se_portal_group *tpg,
1452 struct se_lun_acl *lacl)
1453{
1454 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1455 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1456 tpg->se_tpg_tfo->tpg_get_tag(tpg),
1457 tpg->se_tpg_tfo->get_fabric_name(),
1458 lacl->initiatorname, lacl->mapped_lun);
1459
1460 kfree(lacl);
1461}
1462
1463static void scsi_dump_inquiry(struct se_device *dev)
1464{
1465 struct t10_wwn *wwn = &dev->t10_wwn;
1466 char buf[17];
1467 int i, device_type;
1468 /*
1469 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer
1470 */
1471 for (i = 0; i < 8; i++)
1472 if (wwn->vendor[i] >= 0x20)
1473 buf[i] = wwn->vendor[i];
1474 else
1475 buf[i] = ' ';
1476 buf[i] = '\0';
1477 pr_debug(" Vendor: %s\n", buf);
1478
1479 for (i = 0; i < 16; i++)
1480 if (wwn->model[i] >= 0x20)
1481 buf[i] = wwn->model[i];
1482 else
1483 buf[i] = ' ';
1484 buf[i] = '\0';
1485 pr_debug(" Model: %s\n", buf);
1486
1487 for (i = 0; i < 4; i++)
1488 if (wwn->revision[i] >= 0x20)
1489 buf[i] = wwn->revision[i];
1490 else
1491 buf[i] = ' ';
1492 buf[i] = '\0';
1493 pr_debug(" Revision: %s\n", buf);
1494
1495 device_type = dev->transport->get_device_type(dev);
1496 pr_debug(" Type: %s ", scsi_device_type(device_type));
1497}
1498
1499struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
1500{
1501 struct se_device *dev;
1502 struct se_lun *xcopy_lun;
1503
1504 dev = hba->transport->alloc_device(hba, name);
1505 if (!dev)
1506 return NULL;
1507
1508 dev->dev_link_magic = SE_DEV_LINK_MAGIC;
1509 dev->se_hba = hba;
1510 dev->transport = hba->transport;
1511 dev->prot_length = sizeof(struct se_dif_v1_tuple);
1512
1513 INIT_LIST_HEAD(&dev->dev_list);
1514 INIT_LIST_HEAD(&dev->dev_sep_list);
1515 INIT_LIST_HEAD(&dev->dev_tmr_list);
1516 INIT_LIST_HEAD(&dev->delayed_cmd_list);
1517 INIT_LIST_HEAD(&dev->state_list);
1518 INIT_LIST_HEAD(&dev->qf_cmd_list);
1519 INIT_LIST_HEAD(&dev->g_dev_node);
1520 spin_lock_init(&dev->execute_task_lock);
1521 spin_lock_init(&dev->delayed_cmd_lock);
1522 spin_lock_init(&dev->dev_reservation_lock);
1523 spin_lock_init(&dev->se_port_lock);
1524 spin_lock_init(&dev->se_tmr_lock);
1525 spin_lock_init(&dev->qf_cmd_lock);
1526 sema_init(&dev->caw_sem, 1);
1527 atomic_set(&dev->dev_ordered_id, 0);
1528 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list);
1529 spin_lock_init(&dev->t10_wwn.t10_vpd_lock);
1530 INIT_LIST_HEAD(&dev->t10_pr.registration_list);
1531 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list);
1532 spin_lock_init(&dev->t10_pr.registration_lock);
1533 spin_lock_init(&dev->t10_pr.aptpl_reg_lock);
1534 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list);
1535 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock);
1536 INIT_LIST_HEAD(&dev->t10_alua.lba_map_list);
1537 spin_lock_init(&dev->t10_alua.lba_map_lock);
1538
1539 dev->t10_wwn.t10_dev = dev;
1540 dev->t10_alua.t10_dev = dev;
1541
1542 dev->dev_attrib.da_dev = dev;
1543 dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS;
1544 dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO;
1545 dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
1546 dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
1547 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
1548 dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
1549 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS;
1550 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU;
1551 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
1552 dev->dev_attrib.emulate_caw = DA_EMULATE_CAW;
1553 dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC;
1554 dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT;
1555 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
1556 dev->dev_attrib.is_nonrot = DA_IS_NONROT;
1557 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
1558 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
1559 dev->dev_attrib.max_unmap_block_desc_count =
1560 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
1561 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
1562 dev->dev_attrib.unmap_granularity_alignment =
1563 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
1564 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN;
1565 dev->dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS;
1566 dev->dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS;
1567
1568 xcopy_lun = &dev->xcopy_lun;
1569 xcopy_lun->lun_se_dev = dev;
1570 init_completion(&xcopy_lun->lun_shutdown_comp);
1571 INIT_LIST_HEAD(&xcopy_lun->lun_acl_list);
1572 spin_lock_init(&xcopy_lun->lun_acl_lock);
1573 spin_lock_init(&xcopy_lun->lun_sep_lock);
1574 init_completion(&xcopy_lun->lun_ref_comp);
1575
1576 return dev;
1577}
1578
1579int target_configure_device(struct se_device *dev)
1580{
1581 struct se_hba *hba = dev->se_hba;
1582 int ret;
1583
1584 if (dev->dev_flags & DF_CONFIGURED) {
1585 pr_err("se_dev->se_dev_ptr already set for storage"
1586 " object\n");
1587 return -EEXIST;
1588 }
1589
1590 ret = dev->transport->configure_device(dev);
1591 if (ret)
1592 goto out;
1593 dev->dev_flags |= DF_CONFIGURED;
1594
1595 /*
1596 * XXX: there is not much point to have two different values here..
1597 */
1598 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size;
1599 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth;
1600
1601 /*
1602 * Align max_hw_sectors down to PAGE_SIZE I/O transfers
1603 */
1604 dev->dev_attrib.hw_max_sectors =
1605 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors,
1606 dev->dev_attrib.hw_block_size);
1607
1608 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX);
1609 dev->creation_time = get_jiffies_64();
1610
1611 ret = core_setup_alua(dev);
1612 if (ret)
1613 goto out;
1614
1615 /*
1616 * Startup the struct se_device processing thread
1617 */
1618 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1,
1619 dev->transport->name);
1620 if (!dev->tmr_wq) {
1621 pr_err("Unable to create tmr workqueue for %s\n",
1622 dev->transport->name);
1623 ret = -ENOMEM;
1624 goto out_free_alua;
1625 }
1626
1627 /*
1628 * Setup work_queue for QUEUE_FULL
1629 */
1630 INIT_WORK(&dev->qf_work_queue, target_qf_do_work);
1631
1632 /*
1633 * Preload the initial INQUIRY const values if we are doing
1634 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI
1635 * passthrough because this is being provided by the backend LLD.
1636 */
1637 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) {
1638 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8);
1639 strncpy(&dev->t10_wwn.model[0],
1640 dev->transport->inquiry_prod, 16);
1641 strncpy(&dev->t10_wwn.revision[0],
1642 dev->transport->inquiry_rev, 4);
1643 }
1644
1645 scsi_dump_inquiry(dev);
1646
1647 spin_lock(&hba->device_lock);
1648 hba->dev_count++;
1649 spin_unlock(&hba->device_lock);
1650
1651 mutex_lock(&g_device_mutex);
1652 list_add_tail(&dev->g_dev_node, &g_device_list);
1653 mutex_unlock(&g_device_mutex);
1654
1655 return 0;
1656
1657out_free_alua:
1658 core_alua_free_lu_gp_mem(dev);
1659out:
1660 se_release_vpd_for_dev(dev);
1661 return ret;
1662}
1663
1664void target_free_device(struct se_device *dev)
1665{
1666 struct se_hba *hba = dev->se_hba;
1667
1668 WARN_ON(!list_empty(&dev->dev_sep_list));
1669
1670 if (dev->dev_flags & DF_CONFIGURED) {
1671 destroy_workqueue(dev->tmr_wq);
1672
1673 mutex_lock(&g_device_mutex);
1674 list_del(&dev->g_dev_node);
1675 mutex_unlock(&g_device_mutex);
1676
1677 spin_lock(&hba->device_lock);
1678 hba->dev_count--;
1679 spin_unlock(&hba->device_lock);
1680 }
1681
1682 core_alua_free_lu_gp_mem(dev);
1683 core_alua_set_lba_map(dev, NULL, 0, 0);
1684 core_scsi3_free_all_registrations(dev);
1685 se_release_vpd_for_dev(dev);
1686
1687 if (dev->transport->free_prot)
1688 dev->transport->free_prot(dev);
1689
1690 dev->transport->free_device(dev);
1691}
1692
1693int core_dev_setup_virtual_lun0(void)
1694{
1695 struct se_hba *hba;
1696 struct se_device *dev;
1697 char buf[] = "rd_pages=8,rd_nullio=1";
1698 int ret;
1699
1700 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
1701 if (IS_ERR(hba))
1702 return PTR_ERR(hba);
1703
1704 dev = target_alloc_device(hba, "virt_lun0");
1705 if (!dev) {
1706 ret = -ENOMEM;
1707 goto out_free_hba;
1708 }
1709
1710 hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf));
1711
1712 ret = target_configure_device(dev);
1713 if (ret)
1714 goto out_free_se_dev;
1715
1716 lun0_hba = hba;
1717 g_lun0_dev = dev;
1718 return 0;
1719
1720out_free_se_dev:
1721 target_free_device(dev);
1722out_free_hba:
1723 core_delete_hba(hba);
1724 return ret;
1725}
1726
1727
1728void core_dev_release_virtual_lun0(void)
1729{
1730 struct se_hba *hba = lun0_hba;
1731
1732 if (!hba)
1733 return;
1734
1735 if (g_lun0_dev)
1736 target_free_device(g_lun0_dev);
1737 core_delete_hba(hba);
1738}