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qlcnic: Fix trivial typo in comment
[linux-2.6/btrfs-unstable.git] / drivers / target / target_core_device.c
blob58f49ff69b1424bf5feb33ed64eba495d8826851
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
50 DEFINE_MUTEX(g_device_mutex);
51 LIST_HEAD(g_device_list);
52
53 static struct se_hba *lun0_hba;
54 /* not static, needed by tpg.c */
55 struct se_device *g_lun0_dev;
56
57 sense_reason_t
58 transport_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 }
142 EXPORT_SYMBOL(transport_lookup_cmd_lun);
143
144 int 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 }
186 EXPORT_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 */
193 struct 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
237 int 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
276 void 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 */
299 int 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 */
376 int 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 */
430 void 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
460 static 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 }
482 again:
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
512 static 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 */
554 static 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
573 int 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
595 void 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
622 static 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
635 static 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
653 int 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 EXPORT_SYMBOL(se_dev_set_max_unmap_lba_count);
663
664 int 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 }
674 EXPORT_SYMBOL(se_dev_set_max_unmap_block_desc_count);
675
676 int 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 }
685 EXPORT_SYMBOL(se_dev_set_unmap_granularity);
686
687 int 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 }
696 EXPORT_SYMBOL(se_dev_set_unmap_granularity_alignment);
697
698 int 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 }
707 EXPORT_SYMBOL(se_dev_set_max_write_same_len);
708
709 static 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
722 int 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 }
746 EXPORT_SYMBOL(se_dev_set_emulate_model_alias);
747
748 int 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 }
762 EXPORT_SYMBOL(se_dev_set_emulate_dpo);
763
764 int 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 }
775 EXPORT_SYMBOL(se_dev_set_emulate_fua_write);
776
777 int 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 }
791 EXPORT_SYMBOL(se_dev_set_emulate_fua_read);
792
793 int 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 }
810 EXPORT_SYMBOL(se_dev_set_emulate_write_cache);
811
812 int 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 }
831 EXPORT_SYMBOL(se_dev_set_emulate_ua_intlck_ctrl);
832
833 int 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 EXPORT_SYMBOL(se_dev_set_emulate_tas);
853
854 int 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 }
874 EXPORT_SYMBOL(se_dev_set_emulate_tpu);
875
876 int 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 }
896 EXPORT_SYMBOL(se_dev_set_emulate_tpws);
897
898 int 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 }
910 EXPORT_SYMBOL(se_dev_set_emulate_caw);
911
912 int 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 }
924 EXPORT_SYMBOL(se_dev_set_emulate_3pc);
925
926 int 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 }
978 EXPORT_SYMBOL(se_dev_set_pi_prot_type);
979
980 int 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 }
1014 EXPORT_SYMBOL(se_dev_set_pi_prot_format);
1015
1016 int 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 }
1027 EXPORT_SYMBOL(se_dev_set_enforce_pr_isids);
1028
1029 int 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 }
1045 EXPORT_SYMBOL(se_dev_set_force_pr_aptpl);
1046
1047 int 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 }
1058 EXPORT_SYMBOL(se_dev_set_is_nonrot);
1059
1060 int 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 }
1071 EXPORT_SYMBOL(se_dev_set_emulate_rest_reord);
1072
1073 /*
1074 * Note, this can only be called on unexported SE Device Object.
1075 */
1076 int 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 }
1104 EXPORT_SYMBOL(se_dev_set_queue_depth);
1105
1106 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
1107 {
1108 if (dev->export_count) {
1109 pr_err("dev[%p]: Unable to change SE Device"
1110 " optimal_sectors while export_count is %d\n",
1111 dev, dev->export_count);
1112 return -EINVAL;
1113 }
1114 if (optimal_sectors > dev->dev_attrib.hw_max_sectors) {
1115 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1116 " greater than hw_max_sectors: %u\n", dev,
1117 optimal_sectors, dev->dev_attrib.hw_max_sectors);
1118 return -EINVAL;
1119 }
1120
1121 dev->dev_attrib.optimal_sectors = optimal_sectors;
1122 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1123 dev, optimal_sectors);
1124 return 0;
1125 }
1126 EXPORT_SYMBOL(se_dev_set_optimal_sectors);
1127
1128 int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1129 {
1130 if (dev->export_count) {
1131 pr_err("dev[%p]: Unable to change SE Device block_size"
1132 " while export_count is %d\n",
1133 dev, dev->export_count);
1134 return -EINVAL;
1135 }
1136
1137 if ((block_size != 512) &&
1138 (block_size != 1024) &&
1139 (block_size != 2048) &&
1140 (block_size != 4096)) {
1141 pr_err("dev[%p]: Illegal value for block_device: %u"
1142 " for SE device, must be 512, 1024, 2048 or 4096\n",
1143 dev, block_size);
1144 return -EINVAL;
1145 }
1146
1147 dev->dev_attrib.block_size = block_size;
1148 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1149 dev, block_size);
1150
1151 if (dev->dev_attrib.max_bytes_per_io)
1152 dev->dev_attrib.hw_max_sectors =
1153 dev->dev_attrib.max_bytes_per_io / block_size;
1154
1155 return 0;
1156 }
1157 EXPORT_SYMBOL(se_dev_set_block_size);
1158
1159 struct se_lun *core_dev_add_lun(
1160 struct se_portal_group *tpg,
1161 struct se_device *dev,
1162 u32 unpacked_lun)
1163 {
1164 struct se_lun *lun;
1165 int rc;
1166
1167 lun = core_tpg_alloc_lun(tpg, unpacked_lun);
1168 if (IS_ERR(lun))
1169 return lun;
1170
1171 rc = core_tpg_add_lun(tpg, lun,
1172 TRANSPORT_LUNFLAGS_READ_WRITE, dev);
1173 if (rc < 0)
1174 return ERR_PTR(rc);
1175
1176 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1177 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1178 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1179 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id);
1180 /*
1181 * Update LUN maps for dynamically added initiators when
1182 * generate_node_acl is enabled.
1183 */
1184 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
1185 struct se_node_acl *acl;
1186 spin_lock_irq(&tpg->acl_node_lock);
1187 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
1188 if (acl->dynamic_node_acl &&
1189 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
1190 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
1191 spin_unlock_irq(&tpg->acl_node_lock);
1192 core_tpg_add_node_to_devs(acl, tpg);
1193 spin_lock_irq(&tpg->acl_node_lock);
1194 }
1195 }
1196 spin_unlock_irq(&tpg->acl_node_lock);
1197 }
1198
1199 return lun;
1200 }
1201
1202 /* core_dev_del_lun():
1203 *
1204 *
1205 */
1206 void core_dev_del_lun(
1207 struct se_portal_group *tpg,
1208 struct se_lun *lun)
1209 {
1210 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivating %s Logical Unit from"
1211 " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
1212 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1213 tpg->se_tpg_tfo->get_fabric_name());
1214
1215 core_tpg_remove_lun(tpg, lun);
1216 }
1217
1218 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1219 {
1220 struct se_lun *lun;
1221
1222 spin_lock(&tpg->tpg_lun_lock);
1223 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1224 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1225 "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1226 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1227 TRANSPORT_MAX_LUNS_PER_TPG-1,
1228 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1229 spin_unlock(&tpg->tpg_lun_lock);
1230 return NULL;
1231 }
1232 lun = tpg->tpg_lun_list[unpacked_lun];
1233
1234 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
1235 pr_err("%s Logical Unit Number: %u is not free on"
1236 " Target Portal Group: %hu, ignoring request.\n",
1237 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1238 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1239 spin_unlock(&tpg->tpg_lun_lock);
1240 return NULL;
1241 }
1242 spin_unlock(&tpg->tpg_lun_lock);
1243
1244 return lun;
1245 }
1246
1247 /* core_dev_get_lun():
1248 *
1249 *
1250 */
1251 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1252 {
1253 struct se_lun *lun;
1254
1255 spin_lock(&tpg->tpg_lun_lock);
1256 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1257 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1258 "_TPG-1: %u for Target Portal Group: %hu\n",
1259 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1260 TRANSPORT_MAX_LUNS_PER_TPG-1,
1261 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1262 spin_unlock(&tpg->tpg_lun_lock);
1263 return NULL;
1264 }
1265 lun = tpg->tpg_lun_list[unpacked_lun];
1266
1267 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
1268 pr_err("%s Logical Unit Number: %u is not active on"
1269 " Target Portal Group: %hu, ignoring request.\n",
1270 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1271 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1272 spin_unlock(&tpg->tpg_lun_lock);
1273 return NULL;
1274 }
1275 spin_unlock(&tpg->tpg_lun_lock);
1276
1277 return lun;
1278 }
1279
1280 struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1281 struct se_portal_group *tpg,
1282 struct se_node_acl *nacl,
1283 u32 mapped_lun,
1284 int *ret)
1285 {
1286 struct se_lun_acl *lacl;
1287
1288 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) {
1289 pr_err("%s InitiatorName exceeds maximum size.\n",
1290 tpg->se_tpg_tfo->get_fabric_name());
1291 *ret = -EOVERFLOW;
1292 return NULL;
1293 }
1294 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
1295 if (!lacl) {
1296 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
1297 *ret = -ENOMEM;
1298 return NULL;
1299 }
1300
1301 INIT_LIST_HEAD(&lacl->lacl_list);
1302 lacl->mapped_lun = mapped_lun;
1303 lacl->se_lun_nacl = nacl;
1304 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s",
1305 nacl->initiatorname);
1306
1307 return lacl;
1308 }
1309
1310 int core_dev_add_initiator_node_lun_acl(
1311 struct se_portal_group *tpg,
1312 struct se_lun_acl *lacl,
1313 u32 unpacked_lun,
1314 u32 lun_access)
1315 {
1316 struct se_lun *lun;
1317 struct se_node_acl *nacl;
1318
1319 lun = core_dev_get_lun(tpg, unpacked_lun);
1320 if (!lun) {
1321 pr_err("%s Logical Unit Number: %u is not active on"
1322 " Target Portal Group: %hu, ignoring request.\n",
1323 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1324 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1325 return -EINVAL;
1326 }
1327
1328 nacl = lacl->se_lun_nacl;
1329 if (!nacl)
1330 return -EINVAL;
1331
1332 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1333 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1334 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1335
1336 lacl->se_lun = lun;
1337
1338 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun,
1339 lun_access, nacl, tpg) < 0)
1340 return -EINVAL;
1341
1342 spin_lock(&lun->lun_acl_lock);
1343 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
1344 atomic_inc_mb(&lun->lun_acl_count);
1345 spin_unlock(&lun->lun_acl_lock);
1346
1347 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1348 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
1349 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
1350 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1351 lacl->initiatorname);
1352 /*
1353 * Check to see if there are any existing persistent reservation APTPL
1354 * pre-registrations that need to be enabled for this LUN ACL..
1355 */
1356 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, nacl,
1357 lacl->mapped_lun);
1358 return 0;
1359 }
1360
1361 /* core_dev_del_initiator_node_lun_acl():
1362 *
1363 *
1364 */
1365 int core_dev_del_initiator_node_lun_acl(
1366 struct se_portal_group *tpg,
1367 struct se_lun *lun,
1368 struct se_lun_acl *lacl)
1369 {
1370 struct se_node_acl *nacl;
1371
1372 nacl = lacl->se_lun_nacl;
1373 if (!nacl)
1374 return -EINVAL;
1375
1376 spin_lock(&lun->lun_acl_lock);
1377 list_del(&lacl->lacl_list);
1378 atomic_dec_mb(&lun->lun_acl_count);
1379 spin_unlock(&lun->lun_acl_lock);
1380
1381 core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun,
1382 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
1383
1384 lacl->se_lun = NULL;
1385
1386 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1387 " InitiatorNode: %s Mapped LUN: %u\n",
1388 tpg->se_tpg_tfo->get_fabric_name(),
1389 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1390 lacl->initiatorname, lacl->mapped_lun);
1391
1392 return 0;
1393 }
1394
1395 void core_dev_free_initiator_node_lun_acl(
1396 struct se_portal_group *tpg,
1397 struct se_lun_acl *lacl)
1398 {
1399 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1400 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1401 tpg->se_tpg_tfo->tpg_get_tag(tpg),
1402 tpg->se_tpg_tfo->get_fabric_name(),
1403 lacl->initiatorname, lacl->mapped_lun);
1404
1405 kfree(lacl);
1406 }
1407
1408 static void scsi_dump_inquiry(struct se_device *dev)
1409 {
1410 struct t10_wwn *wwn = &dev->t10_wwn;
1411 char buf[17];
1412 int i, device_type;
1413 /*
1414 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer
1415 */
1416 for (i = 0; i < 8; i++)
1417 if (wwn->vendor[i] >= 0x20)
1418 buf[i] = wwn->vendor[i];
1419 else
1420 buf[i] = ' ';
1421 buf[i] = '\0';
1422 pr_debug(" Vendor: %s\n", buf);
1423
1424 for (i = 0; i < 16; i++)
1425 if (wwn->model[i] >= 0x20)
1426 buf[i] = wwn->model[i];
1427 else
1428 buf[i] = ' ';
1429 buf[i] = '\0';
1430 pr_debug(" Model: %s\n", buf);
1431
1432 for (i = 0; i < 4; i++)
1433 if (wwn->revision[i] >= 0x20)
1434 buf[i] = wwn->revision[i];
1435 else
1436 buf[i] = ' ';
1437 buf[i] = '\0';
1438 pr_debug(" Revision: %s\n", buf);
1439
1440 device_type = dev->transport->get_device_type(dev);
1441 pr_debug(" Type: %s ", scsi_device_type(device_type));
1442 }
1443
1444 struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
1445 {
1446 struct se_device *dev;
1447 struct se_lun *xcopy_lun;
1448
1449 dev = hba->transport->alloc_device(hba, name);
1450 if (!dev)
1451 return NULL;
1452
1453 dev->dev_link_magic = SE_DEV_LINK_MAGIC;
1454 dev->se_hba = hba;
1455 dev->transport = hba->transport;
1456 dev->prot_length = sizeof(struct se_dif_v1_tuple);
1457
1458 INIT_LIST_HEAD(&dev->dev_list);
1459 INIT_LIST_HEAD(&dev->dev_sep_list);
1460 INIT_LIST_HEAD(&dev->dev_tmr_list);
1461 INIT_LIST_HEAD(&dev->delayed_cmd_list);
1462 INIT_LIST_HEAD(&dev->state_list);
1463 INIT_LIST_HEAD(&dev->qf_cmd_list);
1464 INIT_LIST_HEAD(&dev->g_dev_node);
1465 spin_lock_init(&dev->execute_task_lock);
1466 spin_lock_init(&dev->delayed_cmd_lock);
1467 spin_lock_init(&dev->dev_reservation_lock);
1468 spin_lock_init(&dev->se_port_lock);
1469 spin_lock_init(&dev->se_tmr_lock);
1470 spin_lock_init(&dev->qf_cmd_lock);
1471 sema_init(&dev->caw_sem, 1);
1472 atomic_set(&dev->dev_ordered_id, 0);
1473 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list);
1474 spin_lock_init(&dev->t10_wwn.t10_vpd_lock);
1475 INIT_LIST_HEAD(&dev->t10_pr.registration_list);
1476 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list);
1477 spin_lock_init(&dev->t10_pr.registration_lock);
1478 spin_lock_init(&dev->t10_pr.aptpl_reg_lock);
1479 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list);
1480 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock);
1481 INIT_LIST_HEAD(&dev->t10_alua.lba_map_list);
1482 spin_lock_init(&dev->t10_alua.lba_map_lock);
1483
1484 dev->t10_wwn.t10_dev = dev;
1485 dev->t10_alua.t10_dev = dev;
1486
1487 dev->dev_attrib.da_dev = dev;
1488 dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS;
1489 dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO;
1490 dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
1491 dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
1492 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
1493 dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
1494 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS;
1495 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU;
1496 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
1497 dev->dev_attrib.emulate_caw = DA_EMULATE_CAW;
1498 dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC;
1499 dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT;
1500 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
1501 dev->dev_attrib.force_pr_aptpl = DA_FORCE_PR_APTPL;
1502 dev->dev_attrib.is_nonrot = DA_IS_NONROT;
1503 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
1504 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
1505 dev->dev_attrib.max_unmap_block_desc_count =
1506 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
1507 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
1508 dev->dev_attrib.unmap_granularity_alignment =
1509 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
1510 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN;
1511
1512 xcopy_lun = &dev->xcopy_lun;
1513 xcopy_lun->lun_se_dev = dev;
1514 init_completion(&xcopy_lun->lun_shutdown_comp);
1515 INIT_LIST_HEAD(&xcopy_lun->lun_acl_list);
1516 spin_lock_init(&xcopy_lun->lun_acl_lock);
1517 spin_lock_init(&xcopy_lun->lun_sep_lock);
1518 init_completion(&xcopy_lun->lun_ref_comp);
1519
1520 return dev;
1521 }
1522
1523 int target_configure_device(struct se_device *dev)
1524 {
1525 struct se_hba *hba = dev->se_hba;
1526 int ret;
1527
1528 if (dev->dev_flags & DF_CONFIGURED) {
1529 pr_err("se_dev->se_dev_ptr already set for storage"
1530 " object\n");
1531 return -EEXIST;
1532 }
1533
1534 ret = dev->transport->configure_device(dev);
1535 if (ret)
1536 goto out;
1537 dev->dev_flags |= DF_CONFIGURED;
1538
1539 /*
1540 * XXX: there is not much point to have two different values here..
1541 */
1542 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size;
1543 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth;
1544
1545 /*
1546 * Align max_hw_sectors down to PAGE_SIZE I/O transfers
1547 */
1548 dev->dev_attrib.hw_max_sectors =
1549 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors,
1550 dev->dev_attrib.hw_block_size);
1551 dev->dev_attrib.optimal_sectors = dev->dev_attrib.hw_max_sectors;
1552
1553 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX);
1554 dev->creation_time = get_jiffies_64();
1555
1556 ret = core_setup_alua(dev);
1557 if (ret)
1558 goto out;
1559
1560 /*
1561 * Startup the struct se_device processing thread
1562 */
1563 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1,
1564 dev->transport->name);
1565 if (!dev->tmr_wq) {
1566 pr_err("Unable to create tmr workqueue for %s\n",
1567 dev->transport->name);
1568 ret = -ENOMEM;
1569 goto out_free_alua;
1570 }
1571
1572 /*
1573 * Setup work_queue for QUEUE_FULL
1574 */
1575 INIT_WORK(&dev->qf_work_queue, target_qf_do_work);
1576
1577 /*
1578 * Preload the initial INQUIRY const values if we are doing
1579 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI
1580 * passthrough because this is being provided by the backend LLD.
1581 */
1582 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) {
1583 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8);
1584 strncpy(&dev->t10_wwn.model[0],
1585 dev->transport->inquiry_prod, 16);
1586 strncpy(&dev->t10_wwn.revision[0],
1587 dev->transport->inquiry_rev, 4);
1588 }
1589
1590 scsi_dump_inquiry(dev);
1591
1592 spin_lock(&hba->device_lock);
1593 hba->dev_count++;
1594 spin_unlock(&hba->device_lock);
1595
1596 mutex_lock(&g_device_mutex);
1597 list_add_tail(&dev->g_dev_node, &g_device_list);
1598 mutex_unlock(&g_device_mutex);
1599
1600 return 0;
1601
1602 out_free_alua:
1603 core_alua_free_lu_gp_mem(dev);
1604 out:
1605 se_release_vpd_for_dev(dev);
1606 return ret;
1607 }
1608
1609 void target_free_device(struct se_device *dev)
1610 {
1611 struct se_hba *hba = dev->se_hba;
1612
1613 WARN_ON(!list_empty(&dev->dev_sep_list));
1614
1615 if (dev->dev_flags & DF_CONFIGURED) {
1616 destroy_workqueue(dev->tmr_wq);
1617
1618 mutex_lock(&g_device_mutex);
1619 list_del(&dev->g_dev_node);
1620 mutex_unlock(&g_device_mutex);
1621
1622 spin_lock(&hba->device_lock);
1623 hba->dev_count--;
1624 spin_unlock(&hba->device_lock);
1625 }
1626
1627 core_alua_free_lu_gp_mem(dev);
1628 core_alua_set_lba_map(dev, NULL, 0, 0);
1629 core_scsi3_free_all_registrations(dev);
1630 se_release_vpd_for_dev(dev);
1631
1632 if (dev->transport->free_prot)
1633 dev->transport->free_prot(dev);
1634
1635 dev->transport->free_device(dev);
1636 }
1637
1638 int core_dev_setup_virtual_lun0(void)
1639 {
1640 struct se_hba *hba;
1641 struct se_device *dev;
1642 char buf[] = "rd_pages=8,rd_nullio=1";
1643 int ret;
1644
1645 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
1646 if (IS_ERR(hba))
1647 return PTR_ERR(hba);
1648
1649 dev = target_alloc_device(hba, "virt_lun0");
1650 if (!dev) {
1651 ret = -ENOMEM;
1652 goto out_free_hba;
1653 }
1654
1655 hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf));
1656
1657 ret = target_configure_device(dev);
1658 if (ret)
1659 goto out_free_se_dev;
1660
1661 lun0_hba = hba;
1662 g_lun0_dev = dev;
1663 return 0;
1664
1665 out_free_se_dev:
1666 target_free_device(dev);
1667 out_free_hba:
1668 core_delete_hba(hba);
1669 return ret;
1670 }
1671
1672
1673 void core_dev_release_virtual_lun0(void)
1674 {
1675 struct se_hba *hba = lun0_hba;
1676
1677 if (!hba)
1678 return;
1679
1680 if (g_lun0_dev)
1681 target_free_device(g_lun0_dev);
1682 core_delete_hba(hba);
1683 }
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