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xhci: Add completion code to the debug ouput of unhandled transfer events
[deliverable/linux.git] / drivers / target / target_core_device.c
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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_mb(&deve->pr_ref_count);
228 spin_unlock_irq(&nacl->device_list_lock);
229
230 return deve;
231 }
232 spin_unlock_irq(&nacl->device_list_lock);
233
234 return NULL;
235}
236
237int core_free_device_list_for_node(
238 struct se_node_acl *nacl,
239 struct se_portal_group *tpg)
240{
241 struct se_dev_entry *deve;
242 struct se_lun *lun;
243 u32 i;
244
245 if (!nacl->device_list)
246 return 0;
247
248 spin_lock_irq(&nacl->device_list_lock);
249 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
250 deve = nacl->device_list[i];
251
252 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
253 continue;
254
255 if (!deve->se_lun) {
256 pr_err("%s device entries device pointer is"
257 " NULL, but Initiator has access.\n",
258 tpg->se_tpg_tfo->get_fabric_name());
259 continue;
260 }
261 lun = deve->se_lun;
262
263 spin_unlock_irq(&nacl->device_list_lock);
264 core_disable_device_list_for_node(lun, NULL, deve->mapped_lun,
265 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
266 spin_lock_irq(&nacl->device_list_lock);
267 }
268 spin_unlock_irq(&nacl->device_list_lock);
269
270 array_free(nacl->device_list, TRANSPORT_MAX_LUNS_PER_TPG);
271 nacl->device_list = NULL;
272
273 return 0;
274}
275
276void core_update_device_list_access(
277 u32 mapped_lun,
278 u32 lun_access,
279 struct se_node_acl *nacl)
280{
281 struct se_dev_entry *deve;
282
283 spin_lock_irq(&nacl->device_list_lock);
284 deve = nacl->device_list[mapped_lun];
285 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
286 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
287 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
288 } else {
289 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
290 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
291 }
292 spin_unlock_irq(&nacl->device_list_lock);
293}
294
295/* core_enable_device_list_for_node():
296 *
297 *
298 */
299int core_enable_device_list_for_node(
300 struct se_lun *lun,
301 struct se_lun_acl *lun_acl,
302 u32 mapped_lun,
303 u32 lun_access,
304 struct se_node_acl *nacl,
305 struct se_portal_group *tpg)
306{
307 struct se_port *port = lun->lun_sep;
308 struct se_dev_entry *deve;
309
310 spin_lock_irq(&nacl->device_list_lock);
311
312 deve = nacl->device_list[mapped_lun];
313
314 /*
315 * Check if the call is handling demo mode -> explicit LUN ACL
316 * transition. This transition must be for the same struct se_lun
317 * + mapped_lun that was setup in demo mode..
318 */
319 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
320 if (deve->se_lun_acl != NULL) {
321 pr_err("struct se_dev_entry->se_lun_acl"
322 " already set for demo mode -> explicit"
323 " LUN ACL transition\n");
324 spin_unlock_irq(&nacl->device_list_lock);
325 return -EINVAL;
326 }
327 if (deve->se_lun != lun) {
328 pr_err("struct se_dev_entry->se_lun does"
329 " match passed struct se_lun for demo mode"
330 " -> explicit LUN ACL transition\n");
331 spin_unlock_irq(&nacl->device_list_lock);
332 return -EINVAL;
333 }
334 deve->se_lun_acl = lun_acl;
335
336 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
337 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
338 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
339 } else {
340 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
341 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
342 }
343
344 spin_unlock_irq(&nacl->device_list_lock);
345 return 0;
346 }
347
348 deve->se_lun = lun;
349 deve->se_lun_acl = lun_acl;
350 deve->mapped_lun = mapped_lun;
351 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
352
353 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
354 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
355 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
356 } else {
357 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
358 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
359 }
360
361 deve->creation_time = get_jiffies_64();
362 deve->attach_count++;
363 spin_unlock_irq(&nacl->device_list_lock);
364
365 spin_lock_bh(&port->sep_alua_lock);
366 list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
367 spin_unlock_bh(&port->sep_alua_lock);
368
369 return 0;
370}
371
372/* core_disable_device_list_for_node():
373 *
374 *
375 */
376int core_disable_device_list_for_node(
377 struct se_lun *lun,
378 struct se_lun_acl *lun_acl,
379 u32 mapped_lun,
380 u32 lun_access,
381 struct se_node_acl *nacl,
382 struct se_portal_group *tpg)
383{
384 struct se_port *port = lun->lun_sep;
385 struct se_dev_entry *deve = nacl->device_list[mapped_lun];
386
387 /*
388 * If the MappedLUN entry is being disabled, the entry in
389 * port->sep_alua_list must be removed now before clearing the
390 * struct se_dev_entry pointers below as logic in
391 * core_alua_do_transition_tg_pt() depends on these being present.
392 *
393 * deve->se_lun_acl will be NULL for demo-mode created LUNs
394 * that have not been explicitly converted to MappedLUNs ->
395 * struct se_lun_acl, but we remove deve->alua_port_list from
396 * port->sep_alua_list. This also means that active UAs and
397 * NodeACL context specific PR metadata for demo-mode
398 * MappedLUN *deve will be released below..
399 */
400 spin_lock_bh(&port->sep_alua_lock);
401 list_del(&deve->alua_port_list);
402 spin_unlock_bh(&port->sep_alua_lock);
403 /*
404 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
405 * PR operation to complete.
406 */
407 while (atomic_read(&deve->pr_ref_count) != 0)
408 cpu_relax();
409
410 spin_lock_irq(&nacl->device_list_lock);
411 /*
412 * Disable struct se_dev_entry LUN ACL mapping
413 */
414 core_scsi3_ua_release_all(deve);
415 deve->se_lun = NULL;
416 deve->se_lun_acl = NULL;
417 deve->lun_flags = 0;
418 deve->creation_time = 0;
419 deve->attach_count--;
420 spin_unlock_irq(&nacl->device_list_lock);
421
422 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
423 return 0;
424}
425
426/* core_clear_lun_from_tpg():
427 *
428 *
429 */
430void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
431{
432 struct se_node_acl *nacl;
433 struct se_dev_entry *deve;
434 u32 i;
435
436 spin_lock_irq(&tpg->acl_node_lock);
437 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
438 spin_unlock_irq(&tpg->acl_node_lock);
439
440 spin_lock_irq(&nacl->device_list_lock);
441 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
442 deve = nacl->device_list[i];
443 if (lun != deve->se_lun)
444 continue;
445 spin_unlock_irq(&nacl->device_list_lock);
446
447 core_disable_device_list_for_node(lun, NULL,
448 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
449 nacl, tpg);
450
451 spin_lock_irq(&nacl->device_list_lock);
452 }
453 spin_unlock_irq(&nacl->device_list_lock);
454
455 spin_lock_irq(&tpg->acl_node_lock);
456 }
457 spin_unlock_irq(&tpg->acl_node_lock);
458}
459
460static struct se_port *core_alloc_port(struct se_device *dev)
461{
462 struct se_port *port, *port_tmp;
463
464 port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
465 if (!port) {
466 pr_err("Unable to allocate struct se_port\n");
467 return ERR_PTR(-ENOMEM);
468 }
469 INIT_LIST_HEAD(&port->sep_alua_list);
470 INIT_LIST_HEAD(&port->sep_list);
471 atomic_set(&port->sep_tg_pt_secondary_offline, 0);
472 spin_lock_init(&port->sep_alua_lock);
473 mutex_init(&port->sep_tg_pt_md_mutex);
474
475 spin_lock(&dev->se_port_lock);
476 if (dev->dev_port_count == 0x0000ffff) {
477 pr_warn("Reached dev->dev_port_count =="
478 " 0x0000ffff\n");
479 spin_unlock(&dev->se_port_lock);
480 return ERR_PTR(-ENOSPC);
481 }
482again:
483 /*
484 * Allocate the next RELATIVE TARGET PORT IDENTIFIER for this struct se_device
485 * Here is the table from spc4r17 section 7.7.3.8.
486 *
487 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
488 *
489 * Code Description
490 * 0h Reserved
491 * 1h Relative port 1, historically known as port A
492 * 2h Relative port 2, historically known as port B
493 * 3h to FFFFh Relative port 3 through 65 535
494 */
495 port->sep_rtpi = dev->dev_rpti_counter++;
496 if (!port->sep_rtpi)
497 goto again;
498
499 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
500 /*
501 * Make sure RELATIVE TARGET PORT IDENTIFIER is unique
502 * for 16-bit wrap..
503 */
504 if (port->sep_rtpi == port_tmp->sep_rtpi)
505 goto again;
506 }
507 spin_unlock(&dev->se_port_lock);
508
509 return port;
510}
511
512static void core_export_port(
513 struct se_device *dev,
514 struct se_portal_group *tpg,
515 struct se_port *port,
516 struct se_lun *lun)
517{
518 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
519
520 spin_lock(&dev->se_port_lock);
521 spin_lock(&lun->lun_sep_lock);
522 port->sep_tpg = tpg;
523 port->sep_lun = lun;
524 lun->lun_sep = port;
525 spin_unlock(&lun->lun_sep_lock);
526
527 list_add_tail(&port->sep_list, &dev->dev_sep_list);
528 spin_unlock(&dev->se_port_lock);
529
530 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV &&
531 !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) {
532 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
533 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
534 pr_err("Unable to allocate t10_alua_tg_pt"
535 "_gp_member_t\n");
536 return;
537 }
538 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
539 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
540 dev->t10_alua.default_tg_pt_gp);
541 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
542 pr_debug("%s/%s: Adding to default ALUA Target Port"
543 " Group: alua/default_tg_pt_gp\n",
544 dev->transport->name, tpg->se_tpg_tfo->get_fabric_name());
545 }
546
547 dev->dev_port_count++;
548 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFIER */
549}
550
551/*
552 * Called with struct se_device->se_port_lock spinlock held.
553 */
554static void core_release_port(struct se_device *dev, struct se_port *port)
555 __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock)
556{
557 /*
558 * Wait for any port reference for PR ALL_TG_PT=1 operation
559 * to complete in __core_scsi3_alloc_registration()
560 */
561 spin_unlock(&dev->se_port_lock);
562 if (atomic_read(&port->sep_tg_pt_ref_cnt))
563 cpu_relax();
564 spin_lock(&dev->se_port_lock);
565
566 core_alua_free_tg_pt_gp_mem(port);
567
568 list_del(&port->sep_list);
569 dev->dev_port_count--;
570 kfree(port);
571}
572
573int core_dev_export(
574 struct se_device *dev,
575 struct se_portal_group *tpg,
576 struct se_lun *lun)
577{
578 struct se_hba *hba = dev->se_hba;
579 struct se_port *port;
580
581 port = core_alloc_port(dev);
582 if (IS_ERR(port))
583 return PTR_ERR(port);
584
585 lun->lun_se_dev = dev;
586
587 spin_lock(&hba->device_lock);
588 dev->export_count++;
589 spin_unlock(&hba->device_lock);
590
591 core_export_port(dev, tpg, port, lun);
592 return 0;
593}
594
595void core_dev_unexport(
596 struct se_device *dev,
597 struct se_portal_group *tpg,
598 struct se_lun *lun)
599{
600 struct se_hba *hba = dev->se_hba;
601 struct se_port *port = lun->lun_sep;
602
603 spin_lock(&lun->lun_sep_lock);
604 if (lun->lun_se_dev == NULL) {
605 spin_unlock(&lun->lun_sep_lock);
606 return;
607 }
608 spin_unlock(&lun->lun_sep_lock);
609
610 spin_lock(&dev->se_port_lock);
611 core_release_port(dev, port);
612 spin_unlock(&dev->se_port_lock);
613
614 spin_lock(&hba->device_lock);
615 dev->export_count--;
616 spin_unlock(&hba->device_lock);
617
618 lun->lun_sep = NULL;
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}
662EXPORT_SYMBOL(se_dev_set_max_unmap_lba_count);
663
664int se_dev_set_max_unmap_block_desc_count(
665 struct se_device *dev,
666 u32 max_unmap_block_desc_count)
667{
668 dev->dev_attrib.max_unmap_block_desc_count =
669 max_unmap_block_desc_count;
670 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
671 dev, dev->dev_attrib.max_unmap_block_desc_count);
672 return 0;
673}
674EXPORT_SYMBOL(se_dev_set_max_unmap_block_desc_count);
675
676int se_dev_set_unmap_granularity(
677 struct se_device *dev,
678 u32 unmap_granularity)
679{
680 dev->dev_attrib.unmap_granularity = unmap_granularity;
681 pr_debug("dev[%p]: Set unmap_granularity: %u\n",
682 dev, dev->dev_attrib.unmap_granularity);
683 return 0;
684}
685EXPORT_SYMBOL(se_dev_set_unmap_granularity);
686
687int se_dev_set_unmap_granularity_alignment(
688 struct se_device *dev,
689 u32 unmap_granularity_alignment)
690{
691 dev->dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
692 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
693 dev, dev->dev_attrib.unmap_granularity_alignment);
694 return 0;
695}
696EXPORT_SYMBOL(se_dev_set_unmap_granularity_alignment);
697
698int se_dev_set_max_write_same_len(
699 struct se_device *dev,
700 u32 max_write_same_len)
701{
702 dev->dev_attrib.max_write_same_len = max_write_same_len;
703 pr_debug("dev[%p]: Set max_write_same_len: %u\n",
704 dev, dev->dev_attrib.max_write_same_len);
705 return 0;
706}
707EXPORT_SYMBOL(se_dev_set_max_write_same_len);
708
709static void dev_set_t10_wwn_model_alias(struct se_device *dev)
710{
711 const char *configname;
712
713 configname = config_item_name(&dev->dev_group.cg_item);
714 if (strlen(configname) >= 16) {
715 pr_warn("dev[%p]: Backstore name '%s' is too long for "
716 "INQUIRY_MODEL, truncating to 16 bytes\n", dev,
717 configname);
718 }
719 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname);
720}
721
722int se_dev_set_emulate_model_alias(struct se_device *dev, int flag)
723{
724 if (dev->export_count) {
725 pr_err("dev[%p]: Unable to change model alias"
726 " while export_count is %d\n",
727 dev, dev->export_count);
728 return -EINVAL;
729 }
730
731 if (flag != 0 && flag != 1) {
732 pr_err("Illegal value %d\n", flag);
733 return -EINVAL;
734 }
735
736 if (flag) {
737 dev_set_t10_wwn_model_alias(dev);
738 } else {
739 strncpy(&dev->t10_wwn.model[0],
740 dev->transport->inquiry_prod, 16);
741 }
742 dev->dev_attrib.emulate_model_alias = flag;
743
744 return 0;
745}
746EXPORT_SYMBOL(se_dev_set_emulate_model_alias);
747
748int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
749{
750 if (flag != 0 && flag != 1) {
751 pr_err("Illegal value %d\n", flag);
752 return -EINVAL;
753 }
754
755 if (flag) {
756 pr_err("dpo_emulated not supported\n");
757 return -EINVAL;
758 }
759
760 return 0;
761}
762EXPORT_SYMBOL(se_dev_set_emulate_dpo);
763
764int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
765{
766 if (flag != 0 && flag != 1) {
767 pr_err("Illegal value %d\n", flag);
768 return -EINVAL;
769 }
770 dev->dev_attrib.emulate_fua_write = flag;
771 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
772 dev, dev->dev_attrib.emulate_fua_write);
773 return 0;
774}
775EXPORT_SYMBOL(se_dev_set_emulate_fua_write);
776
777int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
778{
779 if (flag != 0 && flag != 1) {
780 pr_err("Illegal value %d\n", flag);
781 return -EINVAL;
782 }
783
784 if (flag) {
785 pr_err("ua read emulated not supported\n");
786 return -EINVAL;
787 }
788
789 return 0;
790}
791EXPORT_SYMBOL(se_dev_set_emulate_fua_read);
792
793int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
794{
795 if (flag != 0 && flag != 1) {
796 pr_err("Illegal value %d\n", flag);
797 return -EINVAL;
798 }
799 if (flag &&
800 dev->transport->get_write_cache) {
801 pr_err("emulate_write_cache not supported for this device\n");
802 return -EINVAL;
803 }
804
805 dev->dev_attrib.emulate_write_cache = flag;
806 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
807 dev, dev->dev_attrib.emulate_write_cache);
808 return 0;
809}
810EXPORT_SYMBOL(se_dev_set_emulate_write_cache);
811
812int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
813{
814 if ((flag != 0) && (flag != 1) && (flag != 2)) {
815 pr_err("Illegal value %d\n", flag);
816 return -EINVAL;
817 }
818
819 if (dev->export_count) {
820 pr_err("dev[%p]: Unable to change SE Device"
821 " UA_INTRLCK_CTRL while export_count is %d\n",
822 dev, dev->export_count);
823 return -EINVAL;
824 }
825 dev->dev_attrib.emulate_ua_intlck_ctrl = flag;
826 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
827 dev, dev->dev_attrib.emulate_ua_intlck_ctrl);
828
829 return 0;
830}
831EXPORT_SYMBOL(se_dev_set_emulate_ua_intlck_ctrl);
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}
852EXPORT_SYMBOL(se_dev_set_emulate_tas);
853
854int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
855{
856 if ((flag != 0) && (flag != 1)) {
857 pr_err("Illegal value %d\n", flag);
858 return -EINVAL;
859 }
860 /*
861 * We expect this value to be non-zero when generic Block Layer
862 * Discard supported is detected iblock_create_virtdevice().
863 */
864 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) {
865 pr_err("Generic Block Discard not supported\n");
866 return -ENOSYS;
867 }
868
869 dev->dev_attrib.emulate_tpu = flag;
870 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
871 dev, flag);
872 return 0;
873}
874EXPORT_SYMBOL(se_dev_set_emulate_tpu);
875
876int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
877{
878 if ((flag != 0) && (flag != 1)) {
879 pr_err("Illegal value %d\n", flag);
880 return -EINVAL;
881 }
882 /*
883 * We expect this value to be non-zero when generic Block Layer
884 * Discard supported is detected iblock_create_virtdevice().
885 */
886 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) {
887 pr_err("Generic Block Discard not supported\n");
888 return -ENOSYS;
889 }
890
891 dev->dev_attrib.emulate_tpws = flag;
892 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
893 dev, flag);
894 return 0;
895}
896EXPORT_SYMBOL(se_dev_set_emulate_tpws);
897
898int se_dev_set_emulate_caw(struct se_device *dev, int flag)
899{
900 if (flag != 0 && flag != 1) {
901 pr_err("Illegal value %d\n", flag);
902 return -EINVAL;
903 }
904 dev->dev_attrib.emulate_caw = flag;
905 pr_debug("dev[%p]: SE Device CompareAndWrite (AtomicTestandSet): %d\n",
906 dev, flag);
907
908 return 0;
909}
910EXPORT_SYMBOL(se_dev_set_emulate_caw);
911
912int se_dev_set_emulate_3pc(struct se_device *dev, int flag)
913{
914 if (flag != 0 && flag != 1) {
915 pr_err("Illegal value %d\n", flag);
916 return -EINVAL;
917 }
918 dev->dev_attrib.emulate_3pc = flag;
919 pr_debug("dev[%p]: SE Device 3rd Party Copy (EXTENDED_COPY): %d\n",
920 dev, flag);
921
922 return 0;
923}
924EXPORT_SYMBOL(se_dev_set_emulate_3pc);
925
926int se_dev_set_pi_prot_type(struct se_device *dev, int flag)
927{
928 int rc, old_prot = dev->dev_attrib.pi_prot_type;
929
930 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
931 pr_err("Illegal value %d for pi_prot_type\n", flag);
932 return -EINVAL;
933 }
934 if (flag == 2) {
935 pr_err("DIF TYPE2 protection currently not supported\n");
936 return -ENOSYS;
937 }
938 if (dev->dev_attrib.hw_pi_prot_type) {
939 pr_warn("DIF protection enabled on underlying hardware,"
940 " ignoring\n");
941 return 0;
942 }
943 if (!dev->transport->init_prot || !dev->transport->free_prot) {
944 /* 0 is only allowed value for non-supporting backends */
945 if (flag == 0)
946 return 0;
947
948 pr_err("DIF protection not supported by backend: %s\n",
949 dev->transport->name);
950 return -ENOSYS;
951 }
952 if (!(dev->dev_flags & DF_CONFIGURED)) {
953 pr_err("DIF protection requires device to be configured\n");
954 return -ENODEV;
955 }
956 if (dev->export_count) {
957 pr_err("dev[%p]: Unable to change SE Device PROT type while"
958 " export_count is %d\n", dev, dev->export_count);
959 return -EINVAL;
960 }
961
962 dev->dev_attrib.pi_prot_type = flag;
963
964 if (flag && !old_prot) {
965 rc = dev->transport->init_prot(dev);
966 if (rc) {
967 dev->dev_attrib.pi_prot_type = old_prot;
968 return rc;
969 }
970
971 } else if (!flag && old_prot) {
972 dev->transport->free_prot(dev);
973 }
974 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
975
976 return 0;
977}
978EXPORT_SYMBOL(se_dev_set_pi_prot_type);
979
980int se_dev_set_pi_prot_format(struct se_device *dev, int flag)
981{
982 int rc;
983
984 if (!flag)
985 return 0;
986
987 if (flag != 1) {
988 pr_err("Illegal value %d for pi_prot_format\n", flag);
989 return -EINVAL;
990 }
991 if (!dev->transport->format_prot) {
992 pr_err("DIF protection format not supported by backend %s\n",
993 dev->transport->name);
994 return -ENOSYS;
995 }
996 if (!(dev->dev_flags & DF_CONFIGURED)) {
997 pr_err("DIF protection format requires device to be configured\n");
998 return -ENODEV;
999 }
1000 if (dev->export_count) {
1001 pr_err("dev[%p]: Unable to format SE Device PROT type while"
1002 " export_count is %d\n", dev, dev->export_count);
1003 return -EINVAL;
1004 }
1005
1006 rc = dev->transport->format_prot(dev);
1007 if (rc)
1008 return rc;
1009
1010 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
1011
1012 return 0;
1013}
1014EXPORT_SYMBOL(se_dev_set_pi_prot_format);
1015
1016int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
1017{
1018 if ((flag != 0) && (flag != 1)) {
1019 pr_err("Illegal value %d\n", flag);
1020 return -EINVAL;
1021 }
1022 dev->dev_attrib.enforce_pr_isids = flag;
1023 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
1024 (dev->dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
1025 return 0;
1026}
1027EXPORT_SYMBOL(se_dev_set_enforce_pr_isids);
1028
1029int se_dev_set_force_pr_aptpl(struct se_device *dev, int flag)
1030{
1031 if ((flag != 0) && (flag != 1)) {
1032 printk(KERN_ERR "Illegal value %d\n", flag);
1033 return -EINVAL;
1034 }
1035 if (dev->export_count) {
1036 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
1037 " export_count is %d\n", dev, dev->export_count);
1038 return -EINVAL;
1039 }
1040
1041 dev->dev_attrib.force_pr_aptpl = flag;
1042 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", dev, flag);
1043 return 0;
1044}
1045EXPORT_SYMBOL(se_dev_set_force_pr_aptpl);
1046
1047int se_dev_set_is_nonrot(struct se_device *dev, int flag)
1048{
1049 if ((flag != 0) && (flag != 1)) {
1050 printk(KERN_ERR "Illegal value %d\n", flag);
1051 return -EINVAL;
1052 }
1053 dev->dev_attrib.is_nonrot = flag;
1054 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
1055 dev, flag);
1056 return 0;
1057}
1058EXPORT_SYMBOL(se_dev_set_is_nonrot);
1059
1060int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
1061{
1062 if (flag != 0) {
1063 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted"
1064 " reordering not implemented\n", dev);
1065 return -ENOSYS;
1066 }
1067 dev->dev_attrib.emulate_rest_reord = flag;
1068 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
1069 return 0;
1070}
1071EXPORT_SYMBOL(se_dev_set_emulate_rest_reord);
1072
1073/*
1074 * Note, this can only be called on unexported SE Device Object.
1075 */
1076int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
1077{
1078 if (dev->export_count) {
1079 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1080 " export_count is %d\n",
1081 dev, dev->export_count);
1082 return -EINVAL;
1083 }
1084 if (!queue_depth) {
1085 pr_err("dev[%p]: Illegal ZERO value for queue"
1086 "_depth\n", dev);
1087 return -EINVAL;
1088 }
1089
1090 if (queue_depth > dev->dev_attrib.queue_depth) {
1091 if (queue_depth > dev->dev_attrib.hw_queue_depth) {
1092 pr_err("dev[%p]: Passed queue_depth:"
1093 " %u exceeds TCM/SE_Device MAX"
1094 " TCQ: %u\n", dev, queue_depth,
1095 dev->dev_attrib.hw_queue_depth);
1096 return -EINVAL;
1097 }
1098 }
1099 dev->dev_attrib.queue_depth = dev->queue_depth = queue_depth;
1100 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
1101 dev, queue_depth);
1102 return 0;
1103}
1104EXPORT_SYMBOL(se_dev_set_queue_depth);
1105
1106int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
1107{
1108 int block_size = dev->dev_attrib.block_size;
1109
1110 if (dev->export_count) {
1111 pr_err("dev[%p]: Unable to change SE Device"
1112 " fabric_max_sectors while export_count is %d\n",
1113 dev, dev->export_count);
1114 return -EINVAL;
1115 }
1116 if (!fabric_max_sectors) {
1117 pr_err("dev[%p]: Illegal ZERO value for"
1118 " fabric_max_sectors\n", dev);
1119 return -EINVAL;
1120 }
1121 if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
1122 pr_err("dev[%p]: Passed fabric_max_sectors: %u less than"
1123 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors,
1124 DA_STATUS_MAX_SECTORS_MIN);
1125 return -EINVAL;
1126 }
1127 if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
1128 pr_err("dev[%p]: Passed fabric_max_sectors: %u"
1129 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1130 " %u\n", dev, fabric_max_sectors,
1131 DA_STATUS_MAX_SECTORS_MAX);
1132 return -EINVAL;
1133 }
1134 /*
1135 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
1136 */
1137 if (!block_size) {
1138 block_size = 512;
1139 pr_warn("Defaulting to 512 for zero block_size\n");
1140 }
1141 fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors,
1142 block_size);
1143
1144 dev->dev_attrib.fabric_max_sectors = fabric_max_sectors;
1145 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
1146 dev, fabric_max_sectors);
1147 return 0;
1148}
1149EXPORT_SYMBOL(se_dev_set_fabric_max_sectors);
1150
1151int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
1152{
1153 if (dev->export_count) {
1154 pr_err("dev[%p]: Unable to change SE Device"
1155 " optimal_sectors while export_count is %d\n",
1156 dev, dev->export_count);
1157 return -EINVAL;
1158 }
1159 if (optimal_sectors > dev->dev_attrib.fabric_max_sectors) {
1160 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1161 " greater than fabric_max_sectors: %u\n", dev,
1162 optimal_sectors, dev->dev_attrib.fabric_max_sectors);
1163 return -EINVAL;
1164 }
1165
1166 dev->dev_attrib.optimal_sectors = optimal_sectors;
1167 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1168 dev, optimal_sectors);
1169 return 0;
1170}
1171EXPORT_SYMBOL(se_dev_set_optimal_sectors);
1172
1173int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1174{
1175 if (dev->export_count) {
1176 pr_err("dev[%p]: Unable to change SE Device block_size"
1177 " while export_count is %d\n",
1178 dev, dev->export_count);
1179 return -EINVAL;
1180 }
1181
1182 if ((block_size != 512) &&
1183 (block_size != 1024) &&
1184 (block_size != 2048) &&
1185 (block_size != 4096)) {
1186 pr_err("dev[%p]: Illegal value for block_device: %u"
1187 " for SE device, must be 512, 1024, 2048 or 4096\n",
1188 dev, block_size);
1189 return -EINVAL;
1190 }
1191
1192 dev->dev_attrib.block_size = block_size;
1193 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1194 dev, block_size);
1195
1196 if (dev->dev_attrib.max_bytes_per_io)
1197 dev->dev_attrib.hw_max_sectors =
1198 dev->dev_attrib.max_bytes_per_io / block_size;
1199
1200 return 0;
1201}
1202EXPORT_SYMBOL(se_dev_set_block_size);
1203
1204struct se_lun *core_dev_add_lun(
1205 struct se_portal_group *tpg,
1206 struct se_device *dev,
1207 u32 unpacked_lun)
1208{
1209 struct se_lun *lun;
1210 int rc;
1211
1212 lun = core_tpg_alloc_lun(tpg, unpacked_lun);
1213 if (IS_ERR(lun))
1214 return lun;
1215
1216 rc = core_tpg_add_lun(tpg, lun,
1217 TRANSPORT_LUNFLAGS_READ_WRITE, dev);
1218 if (rc < 0)
1219 return ERR_PTR(rc);
1220
1221 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1222 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1223 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1224 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id);
1225 /*
1226 * Update LUN maps for dynamically added initiators when
1227 * generate_node_acl is enabled.
1228 */
1229 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
1230 struct se_node_acl *acl;
1231 spin_lock_irq(&tpg->acl_node_lock);
1232 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
1233 if (acl->dynamic_node_acl &&
1234 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
1235 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
1236 spin_unlock_irq(&tpg->acl_node_lock);
1237 core_tpg_add_node_to_devs(acl, tpg);
1238 spin_lock_irq(&tpg->acl_node_lock);
1239 }
1240 }
1241 spin_unlock_irq(&tpg->acl_node_lock);
1242 }
1243
1244 return lun;
1245}
1246
1247/* core_dev_del_lun():
1248 *
1249 *
1250 */
1251void core_dev_del_lun(
1252 struct se_portal_group *tpg,
1253 struct se_lun *lun)
1254{
1255 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivating %s Logical Unit from"
1256 " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
1257 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1258 tpg->se_tpg_tfo->get_fabric_name());
1259
1260 core_tpg_remove_lun(tpg, lun);
1261}
1262
1263struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1264{
1265 struct se_lun *lun;
1266
1267 spin_lock(&tpg->tpg_lun_lock);
1268 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1269 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1270 "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1271 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1272 TRANSPORT_MAX_LUNS_PER_TPG-1,
1273 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1274 spin_unlock(&tpg->tpg_lun_lock);
1275 return NULL;
1276 }
1277 lun = tpg->tpg_lun_list[unpacked_lun];
1278
1279 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
1280 pr_err("%s Logical Unit Number: %u is not free on"
1281 " Target Portal Group: %hu, ignoring request.\n",
1282 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1283 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1284 spin_unlock(&tpg->tpg_lun_lock);
1285 return NULL;
1286 }
1287 spin_unlock(&tpg->tpg_lun_lock);
1288
1289 return lun;
1290}
1291
1292/* core_dev_get_lun():
1293 *
1294 *
1295 */
1296static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1297{
1298 struct se_lun *lun;
1299
1300 spin_lock(&tpg->tpg_lun_lock);
1301 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1302 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1303 "_TPG-1: %u for Target Portal Group: %hu\n",
1304 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1305 TRANSPORT_MAX_LUNS_PER_TPG-1,
1306 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1307 spin_unlock(&tpg->tpg_lun_lock);
1308 return NULL;
1309 }
1310 lun = tpg->tpg_lun_list[unpacked_lun];
1311
1312 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
1313 pr_err("%s Logical Unit Number: %u is not active on"
1314 " Target Portal Group: %hu, ignoring request.\n",
1315 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1316 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1317 spin_unlock(&tpg->tpg_lun_lock);
1318 return NULL;
1319 }
1320 spin_unlock(&tpg->tpg_lun_lock);
1321
1322 return lun;
1323}
1324
1325struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1326 struct se_portal_group *tpg,
1327 struct se_node_acl *nacl,
1328 u32 mapped_lun,
1329 int *ret)
1330{
1331 struct se_lun_acl *lacl;
1332
1333 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) {
1334 pr_err("%s InitiatorName exceeds maximum size.\n",
1335 tpg->se_tpg_tfo->get_fabric_name());
1336 *ret = -EOVERFLOW;
1337 return NULL;
1338 }
1339 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
1340 if (!lacl) {
1341 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
1342 *ret = -ENOMEM;
1343 return NULL;
1344 }
1345
1346 INIT_LIST_HEAD(&lacl->lacl_list);
1347 lacl->mapped_lun = mapped_lun;
1348 lacl->se_lun_nacl = nacl;
1349 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s",
1350 nacl->initiatorname);
1351
1352 return lacl;
1353}
1354
1355int core_dev_add_initiator_node_lun_acl(
1356 struct se_portal_group *tpg,
1357 struct se_lun_acl *lacl,
1358 u32 unpacked_lun,
1359 u32 lun_access)
1360{
1361 struct se_lun *lun;
1362 struct se_node_acl *nacl;
1363
1364 lun = core_dev_get_lun(tpg, unpacked_lun);
1365 if (!lun) {
1366 pr_err("%s Logical Unit Number: %u is not active on"
1367 " Target Portal Group: %hu, ignoring request.\n",
1368 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1369 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1370 return -EINVAL;
1371 }
1372
1373 nacl = lacl->se_lun_nacl;
1374 if (!nacl)
1375 return -EINVAL;
1376
1377 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1378 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1379 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1380
1381 lacl->se_lun = lun;
1382
1383 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun,
1384 lun_access, nacl, tpg) < 0)
1385 return -EINVAL;
1386
1387 spin_lock(&lun->lun_acl_lock);
1388 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
1389 atomic_inc_mb(&lun->lun_acl_count);
1390 spin_unlock(&lun->lun_acl_lock);
1391
1392 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1393 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
1394 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
1395 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1396 lacl->initiatorname);
1397 /*
1398 * Check to see if there are any existing persistent reservation APTPL
1399 * pre-registrations that need to be enabled for this LUN ACL..
1400 */
1401 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, nacl,
1402 lacl->mapped_lun);
1403 return 0;
1404}
1405
1406/* core_dev_del_initiator_node_lun_acl():
1407 *
1408 *
1409 */
1410int core_dev_del_initiator_node_lun_acl(
1411 struct se_portal_group *tpg,
1412 struct se_lun *lun,
1413 struct se_lun_acl *lacl)
1414{
1415 struct se_node_acl *nacl;
1416
1417 nacl = lacl->se_lun_nacl;
1418 if (!nacl)
1419 return -EINVAL;
1420
1421 spin_lock(&lun->lun_acl_lock);
1422 list_del(&lacl->lacl_list);
1423 atomic_dec_mb(&lun->lun_acl_count);
1424 spin_unlock(&lun->lun_acl_lock);
1425
1426 core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun,
1427 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
1428
1429 lacl->se_lun = NULL;
1430
1431 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1432 " InitiatorNode: %s Mapped LUN: %u\n",
1433 tpg->se_tpg_tfo->get_fabric_name(),
1434 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1435 lacl->initiatorname, lacl->mapped_lun);
1436
1437 return 0;
1438}
1439
1440void core_dev_free_initiator_node_lun_acl(
1441 struct se_portal_group *tpg,
1442 struct se_lun_acl *lacl)
1443{
1444 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1445 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1446 tpg->se_tpg_tfo->tpg_get_tag(tpg),
1447 tpg->se_tpg_tfo->get_fabric_name(),
1448 lacl->initiatorname, lacl->mapped_lun);
1449
1450 kfree(lacl);
1451}
1452
1453static void scsi_dump_inquiry(struct se_device *dev)
1454{
1455 struct t10_wwn *wwn = &dev->t10_wwn;
1456 char buf[17];
1457 int i, device_type;
1458 /*
1459 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer
1460 */
1461 for (i = 0; i < 8; i++)
1462 if (wwn->vendor[i] >= 0x20)
1463 buf[i] = wwn->vendor[i];
1464 else
1465 buf[i] = ' ';
1466 buf[i] = '\0';
1467 pr_debug(" Vendor: %s\n", buf);
1468
1469 for (i = 0; i < 16; i++)
1470 if (wwn->model[i] >= 0x20)
1471 buf[i] = wwn->model[i];
1472 else
1473 buf[i] = ' ';
1474 buf[i] = '\0';
1475 pr_debug(" Model: %s\n", buf);
1476
1477 for (i = 0; i < 4; i++)
1478 if (wwn->revision[i] >= 0x20)
1479 buf[i] = wwn->revision[i];
1480 else
1481 buf[i] = ' ';
1482 buf[i] = '\0';
1483 pr_debug(" Revision: %s\n", buf);
1484
1485 device_type = dev->transport->get_device_type(dev);
1486 pr_debug(" Type: %s ", scsi_device_type(device_type));
1487}
1488
1489struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
1490{
1491 struct se_device *dev;
1492 struct se_lun *xcopy_lun;
1493
1494 dev = hba->transport->alloc_device(hba, name);
1495 if (!dev)
1496 return NULL;
1497
1498 dev->dev_link_magic = SE_DEV_LINK_MAGIC;
1499 dev->se_hba = hba;
1500 dev->transport = hba->transport;
1501 dev->prot_length = sizeof(struct se_dif_v1_tuple);
1502
1503 INIT_LIST_HEAD(&dev->dev_list);
1504 INIT_LIST_HEAD(&dev->dev_sep_list);
1505 INIT_LIST_HEAD(&dev->dev_tmr_list);
1506 INIT_LIST_HEAD(&dev->delayed_cmd_list);
1507 INIT_LIST_HEAD(&dev->state_list);
1508 INIT_LIST_HEAD(&dev->qf_cmd_list);
1509 INIT_LIST_HEAD(&dev->g_dev_node);
1510 spin_lock_init(&dev->execute_task_lock);
1511 spin_lock_init(&dev->delayed_cmd_lock);
1512 spin_lock_init(&dev->dev_reservation_lock);
1513 spin_lock_init(&dev->se_port_lock);
1514 spin_lock_init(&dev->se_tmr_lock);
1515 spin_lock_init(&dev->qf_cmd_lock);
1516 sema_init(&dev->caw_sem, 1);
1517 atomic_set(&dev->dev_ordered_id, 0);
1518 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list);
1519 spin_lock_init(&dev->t10_wwn.t10_vpd_lock);
1520 INIT_LIST_HEAD(&dev->t10_pr.registration_list);
1521 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list);
1522 spin_lock_init(&dev->t10_pr.registration_lock);
1523 spin_lock_init(&dev->t10_pr.aptpl_reg_lock);
1524 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list);
1525 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock);
1526 INIT_LIST_HEAD(&dev->t10_alua.lba_map_list);
1527 spin_lock_init(&dev->t10_alua.lba_map_lock);
1528
1529 dev->t10_wwn.t10_dev = dev;
1530 dev->t10_alua.t10_dev = dev;
1531
1532 dev->dev_attrib.da_dev = dev;
1533 dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS;
1534 dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO;
1535 dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
1536 dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
1537 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
1538 dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
1539 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS;
1540 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU;
1541 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
1542 dev->dev_attrib.emulate_caw = DA_EMULATE_CAW;
1543 dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC;
1544 dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT;
1545 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
1546 dev->dev_attrib.force_pr_aptpl = DA_FORCE_PR_APTPL;
1547 dev->dev_attrib.is_nonrot = DA_IS_NONROT;
1548 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
1549 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
1550 dev->dev_attrib.max_unmap_block_desc_count =
1551 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
1552 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
1553 dev->dev_attrib.unmap_granularity_alignment =
1554 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
1555 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN;
1556 dev->dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS;
1557 dev->dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS;
1558
1559 xcopy_lun = &dev->xcopy_lun;
1560 xcopy_lun->lun_se_dev = dev;
1561 init_completion(&xcopy_lun->lun_shutdown_comp);
1562 INIT_LIST_HEAD(&xcopy_lun->lun_acl_list);
1563 spin_lock_init(&xcopy_lun->lun_acl_lock);
1564 spin_lock_init(&xcopy_lun->lun_sep_lock);
1565 init_completion(&xcopy_lun->lun_ref_comp);
1566
1567 return dev;
1568}
1569
1570int target_configure_device(struct se_device *dev)
1571{
1572 struct se_hba *hba = dev->se_hba;
1573 int ret;
1574
1575 if (dev->dev_flags & DF_CONFIGURED) {
1576 pr_err("se_dev->se_dev_ptr already set for storage"
1577 " object\n");
1578 return -EEXIST;
1579 }
1580
1581 ret = dev->transport->configure_device(dev);
1582 if (ret)
1583 goto out;
1584 dev->dev_flags |= DF_CONFIGURED;
1585
1586 /*
1587 * XXX: there is not much point to have two different values here..
1588 */
1589 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size;
1590 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth;
1591
1592 /*
1593 * Align max_hw_sectors down to PAGE_SIZE I/O transfers
1594 */
1595 dev->dev_attrib.hw_max_sectors =
1596 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors,
1597 dev->dev_attrib.hw_block_size);
1598
1599 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX);
1600 dev->creation_time = get_jiffies_64();
1601
1602 ret = core_setup_alua(dev);
1603 if (ret)
1604 goto out;
1605
1606 /*
1607 * Startup the struct se_device processing thread
1608 */
1609 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1,
1610 dev->transport->name);
1611 if (!dev->tmr_wq) {
1612 pr_err("Unable to create tmr workqueue for %s\n",
1613 dev->transport->name);
1614 ret = -ENOMEM;
1615 goto out_free_alua;
1616 }
1617
1618 /*
1619 * Setup work_queue for QUEUE_FULL
1620 */
1621 INIT_WORK(&dev->qf_work_queue, target_qf_do_work);
1622
1623 /*
1624 * Preload the initial INQUIRY const values if we are doing
1625 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI
1626 * passthrough because this is being provided by the backend LLD.
1627 */
1628 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) {
1629 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8);
1630 strncpy(&dev->t10_wwn.model[0],
1631 dev->transport->inquiry_prod, 16);
1632 strncpy(&dev->t10_wwn.revision[0],
1633 dev->transport->inquiry_rev, 4);
1634 }
1635
1636 scsi_dump_inquiry(dev);
1637
1638 spin_lock(&hba->device_lock);
1639 hba->dev_count++;
1640 spin_unlock(&hba->device_lock);
1641
1642 mutex_lock(&g_device_mutex);
1643 list_add_tail(&dev->g_dev_node, &g_device_list);
1644 mutex_unlock(&g_device_mutex);
1645
1646 return 0;
1647
1648out_free_alua:
1649 core_alua_free_lu_gp_mem(dev);
1650out:
1651 se_release_vpd_for_dev(dev);
1652 return ret;
1653}
1654
1655void target_free_device(struct se_device *dev)
1656{
1657 struct se_hba *hba = dev->se_hba;
1658
1659 WARN_ON(!list_empty(&dev->dev_sep_list));
1660
1661 if (dev->dev_flags & DF_CONFIGURED) {
1662 destroy_workqueue(dev->tmr_wq);
1663
1664 mutex_lock(&g_device_mutex);
1665 list_del(&dev->g_dev_node);
1666 mutex_unlock(&g_device_mutex);
1667
1668 spin_lock(&hba->device_lock);
1669 hba->dev_count--;
1670 spin_unlock(&hba->device_lock);
1671 }
1672
1673 core_alua_free_lu_gp_mem(dev);
1674 core_alua_set_lba_map(dev, NULL, 0, 0);
1675 core_scsi3_free_all_registrations(dev);
1676 se_release_vpd_for_dev(dev);
1677
1678 if (dev->transport->free_prot)
1679 dev->transport->free_prot(dev);
1680
1681 dev->transport->free_device(dev);
1682}
1683
1684int core_dev_setup_virtual_lun0(void)
1685{
1686 struct se_hba *hba;
1687 struct se_device *dev;
1688 char buf[] = "rd_pages=8,rd_nullio=1";
1689 int ret;
1690
1691 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
1692 if (IS_ERR(hba))
1693 return PTR_ERR(hba);
1694
1695 dev = target_alloc_device(hba, "virt_lun0");
1696 if (!dev) {
1697 ret = -ENOMEM;
1698 goto out_free_hba;
1699 }
1700
1701 hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf));
1702
1703 ret = target_configure_device(dev);
1704 if (ret)
1705 goto out_free_se_dev;
1706
1707 lun0_hba = hba;
1708 g_lun0_dev = dev;
1709 return 0;
1710
1711out_free_se_dev:
1712 target_free_device(dev);
1713out_free_hba:
1714 core_delete_hba(hba);
1715 return ret;
1716}
1717
1718
1719void core_dev_release_virtual_lun0(void)
1720{
1721 struct se_hba *hba = lun0_hba;
1722
1723 if (!hba)
1724 return;
1725
1726 if (g_lun0_dev)
1727 target_free_device(g_lun0_dev);
1728 core_delete_hba(hba);
1729}
Linux kernel - Deliverables
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