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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 <linux/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 DEFINE_IDR(devices_idr);
41
42static struct se_hba *lun0_hba;
43/* not static, needed by tpg.c */
44struct se_device *g_lun0_dev;
45
46sense_reason_t
47transport_lookup_cmd_lun(struct se_cmd *se_cmd)
48{
49 struct se_lun *se_lun = NULL;
50 struct se_session *se_sess = se_cmd->se_sess;
51 struct se_node_acl *nacl = se_sess->se_node_acl;
52 struct se_dev_entry *deve;
53 sense_reason_t ret = TCM_NO_SENSE;
54
55 rcu_read_lock();
56 deve = target_nacl_find_deve(nacl, se_cmd->orig_fe_lun);
57 if (deve) {
58 atomic_long_inc(&deve->total_cmds);
59
60 if (se_cmd->data_direction == DMA_TO_DEVICE)
61 atomic_long_add(se_cmd->data_length,
62 &deve->write_bytes);
63 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
64 atomic_long_add(se_cmd->data_length,
65 &deve->read_bytes);
66
67 if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
68 deve->lun_access_ro) {
69 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
70 " Access for 0x%08llx\n",
71 se_cmd->se_tfo->fabric_name,
72 se_cmd->orig_fe_lun);
73 rcu_read_unlock();
74 return TCM_WRITE_PROTECTED;
75 }
76
77 se_lun = deve->se_lun;
78
79 if (!percpu_ref_tryget_live(&se_lun->lun_ref)) {
80 se_lun = NULL;
81 goto out_unlock;
82 }
83
84 se_cmd->se_lun = se_lun;
85 se_cmd->pr_res_key = deve->pr_res_key;
86 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
87 se_cmd->lun_ref_active = true;
88 }
89out_unlock:
90 rcu_read_unlock();
91
92 if (!se_lun) {
93 /*
94 * Use the se_portal_group->tpg_virt_lun0 to allow for
95 * REPORT_LUNS, et al to be returned when no active
96 * MappedLUN=0 exists for this Initiator Port.
97 */
98 if (se_cmd->orig_fe_lun != 0) {
99 pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
100 " Access for 0x%08llx from %s\n",
101 se_cmd->se_tfo->fabric_name,
102 se_cmd->orig_fe_lun,
103 nacl->initiatorname);
104 return TCM_NON_EXISTENT_LUN;
105 }
106
107 /*
108 * Force WRITE PROTECT for virtual LUN 0
109 */
110 if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
111 (se_cmd->data_direction != DMA_NONE))
112 return TCM_WRITE_PROTECTED;
113
114 se_lun = se_sess->se_tpg->tpg_virt_lun0;
115 if (!percpu_ref_tryget_live(&se_lun->lun_ref))
116 return TCM_NON_EXISTENT_LUN;
117
118 se_cmd->se_lun = se_sess->se_tpg->tpg_virt_lun0;
119 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
120 se_cmd->lun_ref_active = true;
121 }
122 /*
123 * RCU reference protected by percpu se_lun->lun_ref taken above that
124 * must drop to zero (including initial reference) before this se_lun
125 * pointer can be kfree_rcu() by the final se_lun->lun_group put via
126 * target_core_fabric_configfs.c:target_fabric_port_release
127 */
128 se_cmd->se_dev = rcu_dereference_raw(se_lun->lun_se_dev);
129 atomic_long_inc(&se_cmd->se_dev->num_cmds);
130
131 if (se_cmd->data_direction == DMA_TO_DEVICE)
132 atomic_long_add(se_cmd->data_length,
133 &se_cmd->se_dev->write_bytes);
134 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
135 atomic_long_add(se_cmd->data_length,
136 &se_cmd->se_dev->read_bytes);
137
138 return ret;
139}
140EXPORT_SYMBOL(transport_lookup_cmd_lun);
141
142int transport_lookup_tmr_lun(struct se_cmd *se_cmd)
143{
144 struct se_dev_entry *deve;
145 struct se_lun *se_lun = NULL;
146 struct se_session *se_sess = se_cmd->se_sess;
147 struct se_node_acl *nacl = se_sess->se_node_acl;
148 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
149
150 rcu_read_lock();
151 deve = target_nacl_find_deve(nacl, se_cmd->orig_fe_lun);
152 if (deve) {
153 se_lun = deve->se_lun;
154
155 if (!percpu_ref_tryget_live(&se_lun->lun_ref)) {
156 se_lun = NULL;
157 goto out_unlock;
158 }
159
160 se_cmd->se_lun = se_lun;
161 se_cmd->pr_res_key = deve->pr_res_key;
162 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
163 se_cmd->lun_ref_active = true;
164 }
165out_unlock:
166 rcu_read_unlock();
167
168 if (!se_lun) {
169 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
170 " Access for 0x%08llx for %s\n",
171 se_cmd->se_tfo->fabric_name,
172 se_cmd->orig_fe_lun,
173 nacl->initiatorname);
174 return -ENODEV;
175 }
176 se_cmd->se_dev = rcu_dereference_raw(se_lun->lun_se_dev);
177 se_tmr->tmr_dev = rcu_dereference_raw(se_lun->lun_se_dev);
178
179 return 0;
180}
181EXPORT_SYMBOL(transport_lookup_tmr_lun);
182
183bool target_lun_is_rdonly(struct se_cmd *cmd)
184{
185 struct se_session *se_sess = cmd->se_sess;
186 struct se_dev_entry *deve;
187 bool ret;
188
189 rcu_read_lock();
190 deve = target_nacl_find_deve(se_sess->se_node_acl, cmd->orig_fe_lun);
191 ret = deve && deve->lun_access_ro;
192 rcu_read_unlock();
193
194 return ret;
195}
196EXPORT_SYMBOL(target_lun_is_rdonly);
197
198/*
199 * This function is called from core_scsi3_emulate_pro_register_and_move()
200 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_kref
201 * when a matching rtpi is found.
202 */
203struct se_dev_entry *core_get_se_deve_from_rtpi(
204 struct se_node_acl *nacl,
205 u16 rtpi)
206{
207 struct se_dev_entry *deve;
208 struct se_lun *lun;
209 struct se_portal_group *tpg = nacl->se_tpg;
210
211 rcu_read_lock();
212 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) {
213 lun = deve->se_lun;
214 if (!lun) {
215 pr_err("%s device entries device pointer is"
216 " NULL, but Initiator has access.\n",
217 tpg->se_tpg_tfo->fabric_name);
218 continue;
219 }
220 if (lun->lun_tpg->tpg_rtpi != rtpi)
221 continue;
222
223 kref_get(&deve->pr_kref);
224 rcu_read_unlock();
225
226 return deve;
227 }
228 rcu_read_unlock();
229
230 return NULL;
231}
232
233void core_free_device_list_for_node(
234 struct se_node_acl *nacl,
235 struct se_portal_group *tpg)
236{
237 struct se_dev_entry *deve;
238
239 mutex_lock(&nacl->lun_entry_mutex);
240 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link)
241 core_disable_device_list_for_node(deve->se_lun, deve, nacl, tpg);
242 mutex_unlock(&nacl->lun_entry_mutex);
243}
244
245void core_update_device_list_access(
246 u64 mapped_lun,
247 bool lun_access_ro,
248 struct se_node_acl *nacl)
249{
250 struct se_dev_entry *deve;
251
252 mutex_lock(&nacl->lun_entry_mutex);
253 deve = target_nacl_find_deve(nacl, mapped_lun);
254 if (deve)
255 deve->lun_access_ro = lun_access_ro;
256 mutex_unlock(&nacl->lun_entry_mutex);
257}
258
259/*
260 * Called with rcu_read_lock or nacl->device_list_lock held.
261 */
262struct se_dev_entry *target_nacl_find_deve(struct se_node_acl *nacl, u64 mapped_lun)
263{
264 struct se_dev_entry *deve;
265
266 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link)
267 if (deve->mapped_lun == mapped_lun)
268 return deve;
269
270 return NULL;
271}
272EXPORT_SYMBOL(target_nacl_find_deve);
273
274void target_pr_kref_release(struct kref *kref)
275{
276 struct se_dev_entry *deve = container_of(kref, struct se_dev_entry,
277 pr_kref);
278 complete(&deve->pr_comp);
279}
280
281/*
282 * Establish UA condition on SCSI device - all LUNs
283 */
284void target_dev_ua_allocate(struct se_device *dev, u8 asc, u8 ascq)
285{
286 struct se_dev_entry *se_deve;
287 struct se_lun *lun;
288
289 spin_lock(&dev->se_port_lock);
290 list_for_each_entry(lun, &dev->dev_sep_list, lun_dev_link) {
291
292 spin_lock(&lun->lun_deve_lock);
293 list_for_each_entry(se_deve, &lun->lun_deve_list, lun_link)
294 core_scsi3_ua_allocate(se_deve, asc, ascq);
295 spin_unlock(&lun->lun_deve_lock);
296 }
297 spin_unlock(&dev->se_port_lock);
298}
299
300static void
301target_luns_data_has_changed(struct se_node_acl *nacl, struct se_dev_entry *new,
302 bool skip_new)
303{
304 struct se_dev_entry *tmp;
305
306 rcu_read_lock();
307 hlist_for_each_entry_rcu(tmp, &nacl->lun_entry_hlist, link) {
308 if (skip_new && tmp == new)
309 continue;
310 core_scsi3_ua_allocate(tmp, 0x3F,
311 ASCQ_3FH_REPORTED_LUNS_DATA_HAS_CHANGED);
312 }
313 rcu_read_unlock();
314}
315
316int core_enable_device_list_for_node(
317 struct se_lun *lun,
318 struct se_lun_acl *lun_acl,
319 u64 mapped_lun,
320 bool lun_access_ro,
321 struct se_node_acl *nacl,
322 struct se_portal_group *tpg)
323{
324 struct se_dev_entry *orig, *new;
325
326 new = kzalloc(sizeof(*new), GFP_KERNEL);
327 if (!new) {
328 pr_err("Unable to allocate se_dev_entry memory\n");
329 return -ENOMEM;
330 }
331
332 spin_lock_init(&new->ua_lock);
333 INIT_LIST_HEAD(&new->ua_list);
334 INIT_LIST_HEAD(&new->lun_link);
335
336 new->mapped_lun = mapped_lun;
337 kref_init(&new->pr_kref);
338 init_completion(&new->pr_comp);
339
340 new->lun_access_ro = lun_access_ro;
341 new->creation_time = get_jiffies_64();
342 new->attach_count++;
343
344 mutex_lock(&nacl->lun_entry_mutex);
345 orig = target_nacl_find_deve(nacl, mapped_lun);
346 if (orig && orig->se_lun) {
347 struct se_lun *orig_lun = orig->se_lun;
348
349 if (orig_lun != lun) {
350 pr_err("Existing orig->se_lun doesn't match new lun"
351 " for dynamic -> explicit NodeACL conversion:"
352 " %s\n", nacl->initiatorname);
353 mutex_unlock(&nacl->lun_entry_mutex);
354 kfree(new);
355 return -EINVAL;
356 }
357 if (orig->se_lun_acl != NULL) {
358 pr_warn_ratelimited("Detected existing explicit"
359 " se_lun_acl->se_lun_group reference for %s"
360 " mapped_lun: %llu, failing\n",
361 nacl->initiatorname, mapped_lun);
362 mutex_unlock(&nacl->lun_entry_mutex);
363 kfree(new);
364 return -EINVAL;
365 }
366
367 new->se_lun = lun;
368 new->se_lun_acl = lun_acl;
369 hlist_del_rcu(&orig->link);
370 hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist);
371 mutex_unlock(&nacl->lun_entry_mutex);
372
373 spin_lock(&lun->lun_deve_lock);
374 list_del(&orig->lun_link);
375 list_add_tail(&new->lun_link, &lun->lun_deve_list);
376 spin_unlock(&lun->lun_deve_lock);
377
378 kref_put(&orig->pr_kref, target_pr_kref_release);
379 wait_for_completion(&orig->pr_comp);
380
381 target_luns_data_has_changed(nacl, new, true);
382 kfree_rcu(orig, rcu_head);
383 return 0;
384 }
385
386 new->se_lun = lun;
387 new->se_lun_acl = lun_acl;
388 hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist);
389 mutex_unlock(&nacl->lun_entry_mutex);
390
391 spin_lock(&lun->lun_deve_lock);
392 list_add_tail(&new->lun_link, &lun->lun_deve_list);
393 spin_unlock(&lun->lun_deve_lock);
394
395 target_luns_data_has_changed(nacl, new, true);
396 return 0;
397}
398
399void core_disable_device_list_for_node(
400 struct se_lun *lun,
401 struct se_dev_entry *orig,
402 struct se_node_acl *nacl,
403 struct se_portal_group *tpg)
404{
405 /*
406 * rcu_dereference_raw protected by se_lun->lun_group symlink
407 * reference to se_device->dev_group.
408 */
409 struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev);
410
411 lockdep_assert_held(&nacl->lun_entry_mutex);
412
413 /*
414 * If the MappedLUN entry is being disabled, the entry in
415 * lun->lun_deve_list must be removed now before clearing the
416 * struct se_dev_entry pointers below as logic in
417 * core_alua_do_transition_tg_pt() depends on these being present.
418 *
419 * deve->se_lun_acl will be NULL for demo-mode created LUNs
420 * that have not been explicitly converted to MappedLUNs ->
421 * struct se_lun_acl, but we remove deve->lun_link from
422 * lun->lun_deve_list. This also means that active UAs and
423 * NodeACL context specific PR metadata for demo-mode
424 * MappedLUN *deve will be released below..
425 */
426 spin_lock(&lun->lun_deve_lock);
427 list_del(&orig->lun_link);
428 spin_unlock(&lun->lun_deve_lock);
429 /*
430 * Disable struct se_dev_entry LUN ACL mapping
431 */
432 core_scsi3_ua_release_all(orig);
433
434 hlist_del_rcu(&orig->link);
435 clear_bit(DEF_PR_REG_ACTIVE, &orig->deve_flags);
436 orig->lun_access_ro = false;
437 orig->creation_time = 0;
438 orig->attach_count--;
439 /*
440 * Before firing off RCU callback, wait for any in process SPEC_I_PT=1
441 * or REGISTER_AND_MOVE PR operation to complete.
442 */
443 kref_put(&orig->pr_kref, target_pr_kref_release);
444 wait_for_completion(&orig->pr_comp);
445
446 kfree_rcu(orig, rcu_head);
447
448 core_scsi3_free_pr_reg_from_nacl(dev, nacl);
449 target_luns_data_has_changed(nacl, NULL, false);
450}
451
452/* core_clear_lun_from_tpg():
453 *
454 *
455 */
456void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
457{
458 struct se_node_acl *nacl;
459 struct se_dev_entry *deve;
460
461 mutex_lock(&tpg->acl_node_mutex);
462 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
463
464 mutex_lock(&nacl->lun_entry_mutex);
465 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) {
466 if (lun != deve->se_lun)
467 continue;
468
469 core_disable_device_list_for_node(lun, deve, nacl, tpg);
470 }
471 mutex_unlock(&nacl->lun_entry_mutex);
472 }
473 mutex_unlock(&tpg->acl_node_mutex);
474}
475
476static void se_release_vpd_for_dev(struct se_device *dev)
477{
478 struct t10_vpd *vpd, *vpd_tmp;
479
480 spin_lock(&dev->t10_wwn.t10_vpd_lock);
481 list_for_each_entry_safe(vpd, vpd_tmp,
482 &dev->t10_wwn.t10_vpd_list, vpd_list) {
483 list_del(&vpd->vpd_list);
484 kfree(vpd);
485 }
486 spin_unlock(&dev->t10_wwn.t10_vpd_lock);
487}
488
489static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
490{
491 u32 aligned_max_sectors;
492 u32 alignment;
493 /*
494 * Limit max_sectors to a PAGE_SIZE aligned value for modern
495 * transport_allocate_data_tasks() operation.
496 */
497 alignment = max(1ul, PAGE_SIZE / block_size);
498 aligned_max_sectors = rounddown(max_sectors, alignment);
499
500 if (max_sectors != aligned_max_sectors)
501 pr_info("Rounding down aligned max_sectors from %u to %u\n",
502 max_sectors, aligned_max_sectors);
503
504 return aligned_max_sectors;
505}
506
507int core_dev_add_lun(
508 struct se_portal_group *tpg,
509 struct se_device *dev,
510 struct se_lun *lun)
511{
512 int rc;
513
514 rc = core_tpg_add_lun(tpg, lun, false, dev);
515 if (rc < 0)
516 return rc;
517
518 pr_debug("%s_TPG[%u]_LUN[%llu] - Activated %s Logical Unit from"
519 " CORE HBA: %u\n", tpg->se_tpg_tfo->fabric_name,
520 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
521 tpg->se_tpg_tfo->fabric_name, dev->se_hba->hba_id);
522 /*
523 * Update LUN maps for dynamically added initiators when
524 * generate_node_acl is enabled.
525 */
526 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
527 struct se_node_acl *acl;
528
529 mutex_lock(&tpg->acl_node_mutex);
530 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
531 if (acl->dynamic_node_acl &&
532 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
533 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
534 core_tpg_add_node_to_devs(acl, tpg, lun);
535 }
536 }
537 mutex_unlock(&tpg->acl_node_mutex);
538 }
539
540 return 0;
541}
542
543/* core_dev_del_lun():
544 *
545 *
546 */
547void core_dev_del_lun(
548 struct se_portal_group *tpg,
549 struct se_lun *lun)
550{
551 pr_debug("%s_TPG[%u]_LUN[%llu] - Deactivating %s Logical Unit from"
552 " device object\n", tpg->se_tpg_tfo->fabric_name,
553 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
554 tpg->se_tpg_tfo->fabric_name);
555
556 core_tpg_remove_lun(tpg, lun);
557}
558
559struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
560 struct se_portal_group *tpg,
561 struct se_node_acl *nacl,
562 u64 mapped_lun,
563 int *ret)
564{
565 struct se_lun_acl *lacl;
566
567 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) {
568 pr_err("%s InitiatorName exceeds maximum size.\n",
569 tpg->se_tpg_tfo->fabric_name);
570 *ret = -EOVERFLOW;
571 return NULL;
572 }
573 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
574 if (!lacl) {
575 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
576 *ret = -ENOMEM;
577 return NULL;
578 }
579
580 lacl->mapped_lun = mapped_lun;
581 lacl->se_lun_nacl = nacl;
582
583 return lacl;
584}
585
586int core_dev_add_initiator_node_lun_acl(
587 struct se_portal_group *tpg,
588 struct se_lun_acl *lacl,
589 struct se_lun *lun,
590 bool lun_access_ro)
591{
592 struct se_node_acl *nacl = lacl->se_lun_nacl;
593 /*
594 * rcu_dereference_raw protected by se_lun->lun_group symlink
595 * reference to se_device->dev_group.
596 */
597 struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev);
598
599 if (!nacl)
600 return -EINVAL;
601
602 if (lun->lun_access_ro)
603 lun_access_ro = true;
604
605 lacl->se_lun = lun;
606
607 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun,
608 lun_access_ro, nacl, tpg) < 0)
609 return -EINVAL;
610
611 pr_debug("%s_TPG[%hu]_LUN[%llu->%llu] - Added %s ACL for "
612 " InitiatorNode: %s\n", tpg->se_tpg_tfo->fabric_name,
613 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, lacl->mapped_lun,
614 lun_access_ro ? "RO" : "RW",
615 nacl->initiatorname);
616 /*
617 * Check to see if there are any existing persistent reservation APTPL
618 * pre-registrations that need to be enabled for this LUN ACL..
619 */
620 core_scsi3_check_aptpl_registration(dev, tpg, lun, nacl,
621 lacl->mapped_lun);
622 return 0;
623}
624
625int core_dev_del_initiator_node_lun_acl(
626 struct se_lun *lun,
627 struct se_lun_acl *lacl)
628{
629 struct se_portal_group *tpg = lun->lun_tpg;
630 struct se_node_acl *nacl;
631 struct se_dev_entry *deve;
632
633 nacl = lacl->se_lun_nacl;
634 if (!nacl)
635 return -EINVAL;
636
637 mutex_lock(&nacl->lun_entry_mutex);
638 deve = target_nacl_find_deve(nacl, lacl->mapped_lun);
639 if (deve)
640 core_disable_device_list_for_node(lun, deve, nacl, tpg);
641 mutex_unlock(&nacl->lun_entry_mutex);
642
643 pr_debug("%s_TPG[%hu]_LUN[%llu] - Removed ACL for"
644 " InitiatorNode: %s Mapped LUN: %llu\n",
645 tpg->se_tpg_tfo->fabric_name,
646 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
647 nacl->initiatorname, lacl->mapped_lun);
648
649 return 0;
650}
651
652void core_dev_free_initiator_node_lun_acl(
653 struct se_portal_group *tpg,
654 struct se_lun_acl *lacl)
655{
656 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
657 " Mapped LUN: %llu\n", tpg->se_tpg_tfo->fabric_name,
658 tpg->se_tpg_tfo->tpg_get_tag(tpg),
659 tpg->se_tpg_tfo->fabric_name,
660 lacl->se_lun_nacl->initiatorname, lacl->mapped_lun);
661
662 kfree(lacl);
663}
664
665static void scsi_dump_inquiry(struct se_device *dev)
666{
667 struct t10_wwn *wwn = &dev->t10_wwn;
668 int device_type = dev->transport->get_device_type(dev);
669
670 /*
671 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer
672 */
673 pr_debug(" Vendor: %-" __stringify(INQUIRY_VENDOR_LEN) "s\n",
674 wwn->vendor);
675 pr_debug(" Model: %-" __stringify(INQUIRY_MODEL_LEN) "s\n",
676 wwn->model);
677 pr_debug(" Revision: %-" __stringify(INQUIRY_REVISION_LEN) "s\n",
678 wwn->revision);
679 pr_debug(" Type: %s ", scsi_device_type(device_type));
680}
681
682struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
683{
684 struct se_device *dev;
685 struct se_lun *xcopy_lun;
686 int i;
687
688 dev = hba->backend->ops->alloc_device(hba, name);
689 if (!dev)
690 return NULL;
691
692 dev->queues = kcalloc(nr_cpu_ids, sizeof(*dev->queues), GFP_KERNEL);
693 if (!dev->queues) {
694 hba->backend->ops->free_device(dev);
695 return NULL;
696 }
697
698 dev->queue_cnt = nr_cpu_ids;
699 for (i = 0; i < dev->queue_cnt; i++) {
700 struct se_device_queue *q;
701
702 q = &dev->queues[i];
703 INIT_LIST_HEAD(&q->state_list);
704 spin_lock_init(&q->lock);
705
706 init_llist_head(&q->sq.cmd_list);
707 INIT_WORK(&q->sq.work, target_queued_submit_work);
708 }
709
710 dev->se_hba = hba;
711 dev->transport = hba->backend->ops;
712 dev->transport_flags = dev->transport->transport_flags_default;
713 dev->prot_length = sizeof(struct t10_pi_tuple);
714 dev->hba_index = hba->hba_index;
715
716 INIT_LIST_HEAD(&dev->dev_sep_list);
717 INIT_LIST_HEAD(&dev->dev_tmr_list);
718 INIT_LIST_HEAD(&dev->delayed_cmd_list);
719 INIT_LIST_HEAD(&dev->qf_cmd_list);
720 spin_lock_init(&dev->delayed_cmd_lock);
721 spin_lock_init(&dev->dev_reservation_lock);
722 spin_lock_init(&dev->se_port_lock);
723 spin_lock_init(&dev->se_tmr_lock);
724 spin_lock_init(&dev->qf_cmd_lock);
725 sema_init(&dev->caw_sem, 1);
726 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list);
727 spin_lock_init(&dev->t10_wwn.t10_vpd_lock);
728 INIT_LIST_HEAD(&dev->t10_pr.registration_list);
729 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list);
730 spin_lock_init(&dev->t10_pr.registration_lock);
731 spin_lock_init(&dev->t10_pr.aptpl_reg_lock);
732 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list);
733 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock);
734 INIT_LIST_HEAD(&dev->t10_alua.lba_map_list);
735 spin_lock_init(&dev->t10_alua.lba_map_lock);
736
737 INIT_WORK(&dev->delayed_cmd_work, target_do_delayed_work);
738 mutex_init(&dev->lun_reset_mutex);
739
740 dev->t10_wwn.t10_dev = dev;
741 /*
742 * Use OpenFabrics IEEE Company ID: 00 14 05
743 */
744 dev->t10_wwn.company_id = 0x001405;
745
746 dev->t10_alua.t10_dev = dev;
747
748 dev->dev_attrib.da_dev = dev;
749 dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS;
750 dev->dev_attrib.emulate_dpo = 1;
751 dev->dev_attrib.emulate_fua_write = 1;
752 dev->dev_attrib.emulate_fua_read = 1;
753 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
754 dev->dev_attrib.emulate_ua_intlck_ctrl = TARGET_UA_INTLCK_CTRL_CLEAR;
755 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS;
756 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU;
757 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
758 dev->dev_attrib.emulate_caw = DA_EMULATE_CAW;
759 dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC;
760 dev->dev_attrib.emulate_pr = DA_EMULATE_PR;
761 dev->dev_attrib.emulate_rsoc = DA_EMULATE_RSOC;
762 dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT;
763 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
764 dev->dev_attrib.force_pr_aptpl = DA_FORCE_PR_APTPL;
765 dev->dev_attrib.is_nonrot = DA_IS_NONROT;
766 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
767 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
768 dev->dev_attrib.max_unmap_block_desc_count =
769 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
770 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
771 dev->dev_attrib.unmap_granularity_alignment =
772 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
773 dev->dev_attrib.unmap_zeroes_data =
774 DA_UNMAP_ZEROES_DATA_DEFAULT;
775 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN;
776 dev->dev_attrib.submit_type = TARGET_FABRIC_DEFAULT_SUBMIT;
777
778 xcopy_lun = &dev->xcopy_lun;
779 rcu_assign_pointer(xcopy_lun->lun_se_dev, dev);
780 init_completion(&xcopy_lun->lun_shutdown_comp);
781 INIT_LIST_HEAD(&xcopy_lun->lun_deve_list);
782 INIT_LIST_HEAD(&xcopy_lun->lun_dev_link);
783 mutex_init(&xcopy_lun->lun_tg_pt_md_mutex);
784 xcopy_lun->lun_tpg = &xcopy_pt_tpg;
785
786 /* Preload the default INQUIRY const values */
787 strscpy(dev->t10_wwn.vendor, "LIO-ORG", sizeof(dev->t10_wwn.vendor));
788 strscpy(dev->t10_wwn.model, dev->transport->inquiry_prod,
789 sizeof(dev->t10_wwn.model));
790 strscpy(dev->t10_wwn.revision, dev->transport->inquiry_rev,
791 sizeof(dev->t10_wwn.revision));
792
793 return dev;
794}
795
796/*
797 * Check if the underlying struct block_device supports discard and if yes
798 * configure the UNMAP parameters.
799 */
800bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib,
801 struct block_device *bdev)
802{
803 int block_size = bdev_logical_block_size(bdev);
804
805 if (!bdev_max_discard_sectors(bdev))
806 return false;
807
808 attrib->max_unmap_lba_count =
809 bdev_max_discard_sectors(bdev) >> (ilog2(block_size) - 9);
810 /*
811 * Currently hardcoded to 1 in Linux/SCSI code..
812 */
813 attrib->max_unmap_block_desc_count = 1;
814 attrib->unmap_granularity = bdev_discard_granularity(bdev) / block_size;
815 attrib->unmap_granularity_alignment =
816 bdev_discard_alignment(bdev) / block_size;
817 return true;
818}
819EXPORT_SYMBOL(target_configure_unmap_from_queue);
820
821/*
822 * Convert from blocksize advertised to the initiator to the 512 byte
823 * units unconditionally used by the Linux block layer.
824 */
825sector_t target_to_linux_sector(struct se_device *dev, sector_t lb)
826{
827 switch (dev->dev_attrib.block_size) {
828 case 4096:
829 return lb << 3;
830 case 2048:
831 return lb << 2;
832 case 1024:
833 return lb << 1;
834 default:
835 return lb;
836 }
837}
838EXPORT_SYMBOL(target_to_linux_sector);
839
840struct devices_idr_iter {
841 int (*fn)(struct se_device *dev, void *data);
842 void *data;
843};
844
845static int target_devices_idr_iter(int id, void *p, void *data)
846 __must_hold(&device_mutex)
847{
848 struct devices_idr_iter *iter = data;
849 struct se_device *dev = p;
850 struct config_item *item;
851 int ret;
852
853 /*
854 * We add the device early to the idr, so it can be used
855 * by backend modules during configuration. We do not want
856 * to allow other callers to access partially setup devices,
857 * so we skip them here.
858 */
859 if (!target_dev_configured(dev))
860 return 0;
861
862 item = config_item_get_unless_zero(&dev->dev_group.cg_item);
863 if (!item)
864 return 0;
865 mutex_unlock(&device_mutex);
866
867 ret = iter->fn(dev, iter->data);
868 config_item_put(item);
869
870 mutex_lock(&device_mutex);
871 return ret;
872}
873
874/**
875 * target_for_each_device - iterate over configured devices
876 * @fn: iterator function
877 * @data: pointer to data that will be passed to fn
878 *
879 * fn must return 0 to continue looping over devices. non-zero will break
880 * from the loop and return that value to the caller.
881 */
882int target_for_each_device(int (*fn)(struct se_device *dev, void *data),
883 void *data)
884{
885 struct devices_idr_iter iter = { .fn = fn, .data = data };
886 int ret;
887
888 mutex_lock(&device_mutex);
889 ret = idr_for_each(&devices_idr, target_devices_idr_iter, &iter);
890 mutex_unlock(&device_mutex);
891 return ret;
892}
893
894int target_configure_device(struct se_device *dev)
895{
896 struct se_hba *hba = dev->se_hba;
897 int ret, id;
898
899 if (target_dev_configured(dev)) {
900 pr_err("se_dev->se_dev_ptr already set for storage"
901 " object\n");
902 return -EEXIST;
903 }
904
905 /*
906 * Add early so modules like tcmu can use during its
907 * configuration.
908 */
909 mutex_lock(&device_mutex);
910 /*
911 * Use cyclic to try and avoid collisions with devices
912 * that were recently removed.
913 */
914 id = idr_alloc_cyclic(&devices_idr, dev, 0, INT_MAX, GFP_KERNEL);
915 mutex_unlock(&device_mutex);
916 if (id < 0) {
917 ret = -ENOMEM;
918 goto out;
919 }
920 dev->dev_index = id;
921
922 ret = dev->transport->configure_device(dev);
923 if (ret)
924 goto out_free_index;
925
926 if (dev->transport->configure_unmap &&
927 dev->transport->configure_unmap(dev)) {
928 pr_debug("Discard support available, but disabled by default.\n");
929 }
930
931 /*
932 * XXX: there is not much point to have two different values here..
933 */
934 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size;
935 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth;
936
937 /*
938 * Align max_hw_sectors down to PAGE_SIZE I/O transfers
939 */
940 dev->dev_attrib.hw_max_sectors =
941 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors,
942 dev->dev_attrib.hw_block_size);
943 dev->dev_attrib.optimal_sectors = dev->dev_attrib.hw_max_sectors;
944
945 dev->creation_time = get_jiffies_64();
946
947 ret = core_setup_alua(dev);
948 if (ret)
949 goto out_destroy_device;
950
951 /*
952 * Setup work_queue for QUEUE_FULL
953 */
954 INIT_WORK(&dev->qf_work_queue, target_qf_do_work);
955
956 scsi_dump_inquiry(dev);
957
958 spin_lock(&hba->device_lock);
959 hba->dev_count++;
960 spin_unlock(&hba->device_lock);
961
962 dev->dev_flags |= DF_CONFIGURED;
963
964 return 0;
965
966out_destroy_device:
967 dev->transport->destroy_device(dev);
968out_free_index:
969 mutex_lock(&device_mutex);
970 idr_remove(&devices_idr, dev->dev_index);
971 mutex_unlock(&device_mutex);
972out:
973 se_release_vpd_for_dev(dev);
974 return ret;
975}
976
977void target_free_device(struct se_device *dev)
978{
979 struct se_hba *hba = dev->se_hba;
980
981 WARN_ON(!list_empty(&dev->dev_sep_list));
982
983 if (target_dev_configured(dev)) {
984 dev->transport->destroy_device(dev);
985
986 mutex_lock(&device_mutex);
987 idr_remove(&devices_idr, dev->dev_index);
988 mutex_unlock(&device_mutex);
989
990 spin_lock(&hba->device_lock);
991 hba->dev_count--;
992 spin_unlock(&hba->device_lock);
993 }
994
995 core_alua_free_lu_gp_mem(dev);
996 core_alua_set_lba_map(dev, NULL, 0, 0);
997 core_scsi3_free_all_registrations(dev);
998 se_release_vpd_for_dev(dev);
999
1000 if (dev->transport->free_prot)
1001 dev->transport->free_prot(dev);
1002
1003 kfree(dev->queues);
1004 dev->transport->free_device(dev);
1005}
1006
1007int core_dev_setup_virtual_lun0(void)
1008{
1009 struct se_hba *hba;
1010 struct se_device *dev;
1011 char buf[] = "rd_pages=8,rd_nullio=1,rd_dummy=1";
1012 int ret;
1013
1014 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
1015 if (IS_ERR(hba))
1016 return PTR_ERR(hba);
1017
1018 dev = target_alloc_device(hba, "virt_lun0");
1019 if (!dev) {
1020 ret = -ENOMEM;
1021 goto out_free_hba;
1022 }
1023
1024 hba->backend->ops->set_configfs_dev_params(dev, buf, sizeof(buf));
1025
1026 ret = target_configure_device(dev);
1027 if (ret)
1028 goto out_free_se_dev;
1029
1030 lun0_hba = hba;
1031 g_lun0_dev = dev;
1032 return 0;
1033
1034out_free_se_dev:
1035 target_free_device(dev);
1036out_free_hba:
1037 core_delete_hba(hba);
1038 return ret;
1039}
1040
1041
1042void core_dev_release_virtual_lun0(void)
1043{
1044 struct se_hba *hba = lun0_hba;
1045
1046 if (!hba)
1047 return;
1048
1049 if (g_lun0_dev)
1050 target_free_device(g_lun0_dev);
1051 core_delete_hba(hba);
1052}
1053
1054/*
1055 * Common CDB parsing for kernel and user passthrough.
1056 */
1057sense_reason_t
1058passthrough_parse_cdb(struct se_cmd *cmd,
1059 sense_reason_t (*exec_cmd)(struct se_cmd *cmd))
1060{
1061 unsigned char *cdb = cmd->t_task_cdb;
1062 struct se_device *dev = cmd->se_dev;
1063 unsigned int size;
1064
1065 /*
1066 * For REPORT LUNS we always need to emulate the response, for everything
1067 * else, pass it up.
1068 */
1069 if (cdb[0] == REPORT_LUNS) {
1070 cmd->execute_cmd = spc_emulate_report_luns;
1071 return TCM_NO_SENSE;
1072 }
1073
1074 /*
1075 * With emulate_pr disabled, all reservation requests should fail,
1076 * regardless of whether or not TRANSPORT_FLAG_PASSTHROUGH_PGR is set.
1077 */
1078 if (!dev->dev_attrib.emulate_pr &&
1079 ((cdb[0] == PERSISTENT_RESERVE_IN) ||
1080 (cdb[0] == PERSISTENT_RESERVE_OUT) ||
1081 (cdb[0] == RELEASE || cdb[0] == RELEASE_10) ||
1082 (cdb[0] == RESERVE || cdb[0] == RESERVE_10))) {
1083 return TCM_UNSUPPORTED_SCSI_OPCODE;
1084 }
1085
1086 /*
1087 * For PERSISTENT RESERVE IN/OUT, RELEASE, and RESERVE we need to
1088 * emulate the response, since tcmu does not have the information
1089 * required to process these commands.
1090 */
1091 if (!(dev->transport_flags &
1092 TRANSPORT_FLAG_PASSTHROUGH_PGR)) {
1093 if (cdb[0] == PERSISTENT_RESERVE_IN) {
1094 cmd->execute_cmd = target_scsi3_emulate_pr_in;
1095 size = get_unaligned_be16(&cdb[7]);
1096 return target_cmd_size_check(cmd, size);
1097 }
1098 if (cdb[0] == PERSISTENT_RESERVE_OUT) {
1099 cmd->execute_cmd = target_scsi3_emulate_pr_out;
1100 size = get_unaligned_be32(&cdb[5]);
1101 return target_cmd_size_check(cmd, size);
1102 }
1103
1104 if (cdb[0] == RELEASE || cdb[0] == RELEASE_10) {
1105 cmd->execute_cmd = target_scsi2_reservation_release;
1106 if (cdb[0] == RELEASE_10)
1107 size = get_unaligned_be16(&cdb[7]);
1108 else
1109 size = cmd->data_length;
1110 return target_cmd_size_check(cmd, size);
1111 }
1112 if (cdb[0] == RESERVE || cdb[0] == RESERVE_10) {
1113 cmd->execute_cmd = target_scsi2_reservation_reserve;
1114 if (cdb[0] == RESERVE_10)
1115 size = get_unaligned_be16(&cdb[7]);
1116 else
1117 size = cmd->data_length;
1118 return target_cmd_size_check(cmd, size);
1119 }
1120 }
1121
1122 /* Set DATA_CDB flag for ops that should have it */
1123 switch (cdb[0]) {
1124 case READ_6:
1125 case READ_10:
1126 case READ_12:
1127 case READ_16:
1128 case WRITE_6:
1129 case WRITE_10:
1130 case WRITE_12:
1131 case WRITE_16:
1132 case WRITE_VERIFY:
1133 case WRITE_VERIFY_12:
1134 case WRITE_VERIFY_16:
1135 case COMPARE_AND_WRITE:
1136 case XDWRITEREAD_10:
1137 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1138 break;
1139 case VARIABLE_LENGTH_CMD:
1140 switch (get_unaligned_be16(&cdb[8])) {
1141 case READ_32:
1142 case WRITE_32:
1143 case WRITE_VERIFY_32:
1144 case XDWRITEREAD_32:
1145 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1146 break;
1147 }
1148 }
1149
1150 cmd->execute_cmd = exec_cmd;
1151
1152 return TCM_NO_SENSE;
1153}
1154EXPORT_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}