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target: encapsulate smp_mb__after_atomic()
[deliverable/linux.git] / drivers / target / target_core_device.c
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
663 int se_dev_set_max_unmap_block_desc_count(
664 struct se_device *dev,
665 u32 max_unmap_block_desc_count)
666 {
667 dev->dev_attrib.max_unmap_block_desc_count =
668 max_unmap_block_desc_count;
669 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
670 dev, dev->dev_attrib.max_unmap_block_desc_count);
671 return 0;
672 }
673
674 int se_dev_set_unmap_granularity(
675 struct se_device *dev,
676 u32 unmap_granularity)
677 {
678 dev->dev_attrib.unmap_granularity = unmap_granularity;
679 pr_debug("dev[%p]: Set unmap_granularity: %u\n",
680 dev, dev->dev_attrib.unmap_granularity);
681 return 0;
682 }
683
684 int se_dev_set_unmap_granularity_alignment(
685 struct se_device *dev,
686 u32 unmap_granularity_alignment)
687 {
688 dev->dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
689 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
690 dev, dev->dev_attrib.unmap_granularity_alignment);
691 return 0;
692 }
693
694 int se_dev_set_max_write_same_len(
695 struct se_device *dev,
696 u32 max_write_same_len)
697 {
698 dev->dev_attrib.max_write_same_len = max_write_same_len;
699 pr_debug("dev[%p]: Set max_write_same_len: %u\n",
700 dev, dev->dev_attrib.max_write_same_len);
701 return 0;
702 }
703
704 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
705 {
706 const char *configname;
707
708 configname = config_item_name(&dev->dev_group.cg_item);
709 if (strlen(configname) >= 16) {
710 pr_warn("dev[%p]: Backstore name '%s' is too long for "
711 "INQUIRY_MODEL, truncating to 16 bytes\n", dev,
712 configname);
713 }
714 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname);
715 }
716
717 int se_dev_set_emulate_model_alias(struct se_device *dev, int flag)
718 {
719 if (dev->export_count) {
720 pr_err("dev[%p]: Unable to change model alias"
721 " while export_count is %d\n",
722 dev, dev->export_count);
723 return -EINVAL;
724 }
725
726 if (flag != 0 && flag != 1) {
727 pr_err("Illegal value %d\n", flag);
728 return -EINVAL;
729 }
730
731 if (flag) {
732 dev_set_t10_wwn_model_alias(dev);
733 } else {
734 strncpy(&dev->t10_wwn.model[0],
735 dev->transport->inquiry_prod, 16);
736 }
737 dev->dev_attrib.emulate_model_alias = flag;
738
739 return 0;
740 }
741
742 int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
743 {
744 if (flag != 0 && flag != 1) {
745 pr_err("Illegal value %d\n", flag);
746 return -EINVAL;
747 }
748
749 if (flag) {
750 pr_err("dpo_emulated not supported\n");
751 return -EINVAL;
752 }
753
754 return 0;
755 }
756
757 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
758 {
759 if (flag != 0 && flag != 1) {
760 pr_err("Illegal value %d\n", flag);
761 return -EINVAL;
762 }
763
764 if (flag &&
765 dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
766 pr_err("emulate_fua_write not supported for pSCSI\n");
767 return -EINVAL;
768 }
769 dev->dev_attrib.emulate_fua_write = flag;
770 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
771 dev, dev->dev_attrib.emulate_fua_write);
772 return 0;
773 }
774
775 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
776 {
777 if (flag != 0 && flag != 1) {
778 pr_err("Illegal value %d\n", flag);
779 return -EINVAL;
780 }
781
782 if (flag) {
783 pr_err("ua read emulated not supported\n");
784 return -EINVAL;
785 }
786
787 return 0;
788 }
789
790 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
791 {
792 if (flag != 0 && flag != 1) {
793 pr_err("Illegal value %d\n", flag);
794 return -EINVAL;
795 }
796 if (flag &&
797 dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
798 pr_err("emulate_write_cache not supported for pSCSI\n");
799 return -EINVAL;
800 }
801 if (flag &&
802 dev->transport->get_write_cache) {
803 pr_err("emulate_write_cache not supported for this device\n");
804 return -EINVAL;
805 }
806
807 dev->dev_attrib.emulate_write_cache = flag;
808 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
809 dev, dev->dev_attrib.emulate_write_cache);
810 return 0;
811 }
812
813 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
814 {
815 if ((flag != 0) && (flag != 1) && (flag != 2)) {
816 pr_err("Illegal value %d\n", flag);
817 return -EINVAL;
818 }
819
820 if (dev->export_count) {
821 pr_err("dev[%p]: Unable to change SE Device"
822 " UA_INTRLCK_CTRL while export_count is %d\n",
823 dev, dev->export_count);
824 return -EINVAL;
825 }
826 dev->dev_attrib.emulate_ua_intlck_ctrl = flag;
827 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
828 dev, dev->dev_attrib.emulate_ua_intlck_ctrl);
829
830 return 0;
831 }
832
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
853 int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
854 {
855 if ((flag != 0) && (flag != 1)) {
856 pr_err("Illegal value %d\n", flag);
857 return -EINVAL;
858 }
859 /*
860 * We expect this value to be non-zero when generic Block Layer
861 * Discard supported is detected iblock_create_virtdevice().
862 */
863 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) {
864 pr_err("Generic Block Discard not supported\n");
865 return -ENOSYS;
866 }
867
868 dev->dev_attrib.emulate_tpu = flag;
869 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
870 dev, flag);
871 return 0;
872 }
873
874 int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
875 {
876 if ((flag != 0) && (flag != 1)) {
877 pr_err("Illegal value %d\n", flag);
878 return -EINVAL;
879 }
880 /*
881 * We expect this value to be non-zero when generic Block Layer
882 * Discard supported is detected iblock_create_virtdevice().
883 */
884 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) {
885 pr_err("Generic Block Discard not supported\n");
886 return -ENOSYS;
887 }
888
889 dev->dev_attrib.emulate_tpws = flag;
890 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
891 dev, flag);
892 return 0;
893 }
894
895 int se_dev_set_emulate_caw(struct se_device *dev, int flag)
896 {
897 if (flag != 0 && flag != 1) {
898 pr_err("Illegal value %d\n", flag);
899 return -EINVAL;
900 }
901 dev->dev_attrib.emulate_caw = flag;
902 pr_debug("dev[%p]: SE Device CompareAndWrite (AtomicTestandSet): %d\n",
903 dev, flag);
904
905 return 0;
906 }
907
908 int se_dev_set_emulate_3pc(struct se_device *dev, int flag)
909 {
910 if (flag != 0 && flag != 1) {
911 pr_err("Illegal value %d\n", flag);
912 return -EINVAL;
913 }
914 dev->dev_attrib.emulate_3pc = flag;
915 pr_debug("dev[%p]: SE Device 3rd Party Copy (EXTENDED_COPY): %d\n",
916 dev, flag);
917
918 return 0;
919 }
920
921 int se_dev_set_pi_prot_type(struct se_device *dev, int flag)
922 {
923 int rc, old_prot = dev->dev_attrib.pi_prot_type;
924
925 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
926 pr_err("Illegal value %d for pi_prot_type\n", flag);
927 return -EINVAL;
928 }
929 if (flag == 2) {
930 pr_err("DIF TYPE2 protection currently not supported\n");
931 return -ENOSYS;
932 }
933 if (dev->dev_attrib.hw_pi_prot_type) {
934 pr_warn("DIF protection enabled on underlying hardware,"
935 " ignoring\n");
936 return 0;
937 }
938 if (!dev->transport->init_prot || !dev->transport->free_prot) {
939 /* 0 is only allowed value for non-supporting backends */
940 if (flag == 0)
941 return 0;
942
943 pr_err("DIF protection not supported by backend: %s\n",
944 dev->transport->name);
945 return -ENOSYS;
946 }
947 if (!(dev->dev_flags & DF_CONFIGURED)) {
948 pr_err("DIF protection requires device to be configured\n");
949 return -ENODEV;
950 }
951 if (dev->export_count) {
952 pr_err("dev[%p]: Unable to change SE Device PROT type while"
953 " export_count is %d\n", dev, dev->export_count);
954 return -EINVAL;
955 }
956
957 dev->dev_attrib.pi_prot_type = flag;
958
959 if (flag && !old_prot) {
960 rc = dev->transport->init_prot(dev);
961 if (rc) {
962 dev->dev_attrib.pi_prot_type = old_prot;
963 return rc;
964 }
965
966 } else if (!flag && old_prot) {
967 dev->transport->free_prot(dev);
968 }
969 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
970
971 return 0;
972 }
973
974 int se_dev_set_pi_prot_format(struct se_device *dev, int flag)
975 {
976 int rc;
977
978 if (!flag)
979 return 0;
980
981 if (flag != 1) {
982 pr_err("Illegal value %d for pi_prot_format\n", flag);
983 return -EINVAL;
984 }
985 if (!dev->transport->format_prot) {
986 pr_err("DIF protection format not supported by backend %s\n",
987 dev->transport->name);
988 return -ENOSYS;
989 }
990 if (!(dev->dev_flags & DF_CONFIGURED)) {
991 pr_err("DIF protection format requires device to be configured\n");
992 return -ENODEV;
993 }
994 if (dev->export_count) {
995 pr_err("dev[%p]: Unable to format SE Device PROT type while"
996 " export_count is %d\n", dev, dev->export_count);
997 return -EINVAL;
998 }
999
1000 rc = dev->transport->format_prot(dev);
1001 if (rc)
1002 return rc;
1003
1004 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
1005
1006 return 0;
1007 }
1008
1009 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
1010 {
1011 if ((flag != 0) && (flag != 1)) {
1012 pr_err("Illegal value %d\n", flag);
1013 return -EINVAL;
1014 }
1015 dev->dev_attrib.enforce_pr_isids = flag;
1016 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
1017 (dev->dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
1018 return 0;
1019 }
1020
1021 int se_dev_set_is_nonrot(struct se_device *dev, int flag)
1022 {
1023 if ((flag != 0) && (flag != 1)) {
1024 printk(KERN_ERR "Illegal value %d\n", flag);
1025 return -EINVAL;
1026 }
1027 dev->dev_attrib.is_nonrot = flag;
1028 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
1029 dev, flag);
1030 return 0;
1031 }
1032
1033 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
1034 {
1035 if (flag != 0) {
1036 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted"
1037 " reordering not implemented\n", dev);
1038 return -ENOSYS;
1039 }
1040 dev->dev_attrib.emulate_rest_reord = flag;
1041 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
1042 return 0;
1043 }
1044
1045 /*
1046 * Note, this can only be called on unexported SE Device Object.
1047 */
1048 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
1049 {
1050 if (dev->export_count) {
1051 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1052 " export_count is %d\n",
1053 dev, dev->export_count);
1054 return -EINVAL;
1055 }
1056 if (!queue_depth) {
1057 pr_err("dev[%p]: Illegal ZERO value for queue"
1058 "_depth\n", dev);
1059 return -EINVAL;
1060 }
1061
1062 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1063 if (queue_depth > dev->dev_attrib.hw_queue_depth) {
1064 pr_err("dev[%p]: Passed queue_depth: %u"
1065 " exceeds TCM/SE_Device TCQ: %u\n",
1066 dev, queue_depth,
1067 dev->dev_attrib.hw_queue_depth);
1068 return -EINVAL;
1069 }
1070 } else {
1071 if (queue_depth > dev->dev_attrib.queue_depth) {
1072 if (queue_depth > dev->dev_attrib.hw_queue_depth) {
1073 pr_err("dev[%p]: Passed queue_depth:"
1074 " %u exceeds TCM/SE_Device MAX"
1075 " TCQ: %u\n", dev, queue_depth,
1076 dev->dev_attrib.hw_queue_depth);
1077 return -EINVAL;
1078 }
1079 }
1080 }
1081
1082 dev->dev_attrib.queue_depth = dev->queue_depth = queue_depth;
1083 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
1084 dev, queue_depth);
1085 return 0;
1086 }
1087
1088 int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
1089 {
1090 int block_size = dev->dev_attrib.block_size;
1091
1092 if (dev->export_count) {
1093 pr_err("dev[%p]: Unable to change SE Device"
1094 " fabric_max_sectors while export_count is %d\n",
1095 dev, dev->export_count);
1096 return -EINVAL;
1097 }
1098 if (!fabric_max_sectors) {
1099 pr_err("dev[%p]: Illegal ZERO value for"
1100 " fabric_max_sectors\n", dev);
1101 return -EINVAL;
1102 }
1103 if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
1104 pr_err("dev[%p]: Passed fabric_max_sectors: %u less than"
1105 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors,
1106 DA_STATUS_MAX_SECTORS_MIN);
1107 return -EINVAL;
1108 }
1109 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1110 if (fabric_max_sectors > dev->dev_attrib.hw_max_sectors) {
1111 pr_err("dev[%p]: Passed fabric_max_sectors: %u"
1112 " greater than TCM/SE_Device max_sectors:"
1113 " %u\n", dev, fabric_max_sectors,
1114 dev->dev_attrib.hw_max_sectors);
1115 return -EINVAL;
1116 }
1117 } else {
1118 if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
1119 pr_err("dev[%p]: Passed fabric_max_sectors: %u"
1120 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1121 " %u\n", dev, fabric_max_sectors,
1122 DA_STATUS_MAX_SECTORS_MAX);
1123 return -EINVAL;
1124 }
1125 }
1126 /*
1127 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
1128 */
1129 if (!block_size) {
1130 block_size = 512;
1131 pr_warn("Defaulting to 512 for zero block_size\n");
1132 }
1133 fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors,
1134 block_size);
1135
1136 dev->dev_attrib.fabric_max_sectors = fabric_max_sectors;
1137 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
1138 dev, fabric_max_sectors);
1139 return 0;
1140 }
1141
1142 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
1143 {
1144 if (dev->export_count) {
1145 pr_err("dev[%p]: Unable to change SE Device"
1146 " optimal_sectors while export_count is %d\n",
1147 dev, dev->export_count);
1148 return -EINVAL;
1149 }
1150 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1151 pr_err("dev[%p]: Passed optimal_sectors cannot be"
1152 " changed for TCM/pSCSI\n", dev);
1153 return -EINVAL;
1154 }
1155 if (optimal_sectors > dev->dev_attrib.fabric_max_sectors) {
1156 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1157 " greater than fabric_max_sectors: %u\n", dev,
1158 optimal_sectors, dev->dev_attrib.fabric_max_sectors);
1159 return -EINVAL;
1160 }
1161
1162 dev->dev_attrib.optimal_sectors = optimal_sectors;
1163 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1164 dev, optimal_sectors);
1165 return 0;
1166 }
1167
1168 int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1169 {
1170 if (dev->export_count) {
1171 pr_err("dev[%p]: Unable to change SE Device block_size"
1172 " while export_count is %d\n",
1173 dev, dev->export_count);
1174 return -EINVAL;
1175 }
1176
1177 if ((block_size != 512) &&
1178 (block_size != 1024) &&
1179 (block_size != 2048) &&
1180 (block_size != 4096)) {
1181 pr_err("dev[%p]: Illegal value for block_device: %u"
1182 " for SE device, must be 512, 1024, 2048 or 4096\n",
1183 dev, block_size);
1184 return -EINVAL;
1185 }
1186
1187 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1188 pr_err("dev[%p]: Not allowed to change block_size for"
1189 " Physical Device, use for Linux/SCSI to change"
1190 " block_size for underlying hardware\n", dev);
1191 return -EINVAL;
1192 }
1193
1194 dev->dev_attrib.block_size = block_size;
1195 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1196 dev, block_size);
1197
1198 if (dev->dev_attrib.max_bytes_per_io)
1199 dev->dev_attrib.hw_max_sectors =
1200 dev->dev_attrib.max_bytes_per_io / block_size;
1201
1202 return 0;
1203 }
1204
1205 struct se_lun *core_dev_add_lun(
1206 struct se_portal_group *tpg,
1207 struct se_device *dev,
1208 u32 unpacked_lun)
1209 {
1210 struct se_lun *lun;
1211 int rc;
1212
1213 lun = core_tpg_alloc_lun(tpg, unpacked_lun);
1214 if (IS_ERR(lun))
1215 return lun;
1216
1217 rc = core_tpg_add_lun(tpg, lun,
1218 TRANSPORT_LUNFLAGS_READ_WRITE, dev);
1219 if (rc < 0)
1220 return ERR_PTR(rc);
1221
1222 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1223 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1224 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1225 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id);
1226 /*
1227 * Update LUN maps for dynamically added initiators when
1228 * generate_node_acl is enabled.
1229 */
1230 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
1231 struct se_node_acl *acl;
1232 spin_lock_irq(&tpg->acl_node_lock);
1233 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
1234 if (acl->dynamic_node_acl &&
1235 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
1236 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
1237 spin_unlock_irq(&tpg->acl_node_lock);
1238 core_tpg_add_node_to_devs(acl, tpg);
1239 spin_lock_irq(&tpg->acl_node_lock);
1240 }
1241 }
1242 spin_unlock_irq(&tpg->acl_node_lock);
1243 }
1244
1245 return lun;
1246 }
1247
1248 /* core_dev_del_lun():
1249 *
1250 *
1251 */
1252 void core_dev_del_lun(
1253 struct se_portal_group *tpg,
1254 struct se_lun *lun)
1255 {
1256 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivating %s Logical Unit from"
1257 " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
1258 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1259 tpg->se_tpg_tfo->get_fabric_name());
1260
1261 core_tpg_remove_lun(tpg, lun);
1262 }
1263
1264 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1265 {
1266 struct se_lun *lun;
1267
1268 spin_lock(&tpg->tpg_lun_lock);
1269 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1270 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1271 "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1272 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1273 TRANSPORT_MAX_LUNS_PER_TPG-1,
1274 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1275 spin_unlock(&tpg->tpg_lun_lock);
1276 return NULL;
1277 }
1278 lun = tpg->tpg_lun_list[unpacked_lun];
1279
1280 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
1281 pr_err("%s Logical Unit Number: %u is not free on"
1282 " Target Portal Group: %hu, ignoring request.\n",
1283 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1284 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1285 spin_unlock(&tpg->tpg_lun_lock);
1286 return NULL;
1287 }
1288 spin_unlock(&tpg->tpg_lun_lock);
1289
1290 return lun;
1291 }
1292
1293 /* core_dev_get_lun():
1294 *
1295 *
1296 */
1297 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1298 {
1299 struct se_lun *lun;
1300
1301 spin_lock(&tpg->tpg_lun_lock);
1302 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1303 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1304 "_TPG-1: %u for Target Portal Group: %hu\n",
1305 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1306 TRANSPORT_MAX_LUNS_PER_TPG-1,
1307 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1308 spin_unlock(&tpg->tpg_lun_lock);
1309 return NULL;
1310 }
1311 lun = tpg->tpg_lun_list[unpacked_lun];
1312
1313 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
1314 pr_err("%s Logical Unit Number: %u is not active on"
1315 " Target Portal Group: %hu, ignoring request.\n",
1316 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1317 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1318 spin_unlock(&tpg->tpg_lun_lock);
1319 return NULL;
1320 }
1321 spin_unlock(&tpg->tpg_lun_lock);
1322
1323 return lun;
1324 }
1325
1326 struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1327 struct se_portal_group *tpg,
1328 struct se_node_acl *nacl,
1329 u32 mapped_lun,
1330 int *ret)
1331 {
1332 struct se_lun_acl *lacl;
1333
1334 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) {
1335 pr_err("%s InitiatorName exceeds maximum size.\n",
1336 tpg->se_tpg_tfo->get_fabric_name());
1337 *ret = -EOVERFLOW;
1338 return NULL;
1339 }
1340 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
1341 if (!lacl) {
1342 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
1343 *ret = -ENOMEM;
1344 return NULL;
1345 }
1346
1347 INIT_LIST_HEAD(&lacl->lacl_list);
1348 lacl->mapped_lun = mapped_lun;
1349 lacl->se_lun_nacl = nacl;
1350 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s",
1351 nacl->initiatorname);
1352
1353 return lacl;
1354 }
1355
1356 int core_dev_add_initiator_node_lun_acl(
1357 struct se_portal_group *tpg,
1358 struct se_lun_acl *lacl,
1359 u32 unpacked_lun,
1360 u32 lun_access)
1361 {
1362 struct se_lun *lun;
1363 struct se_node_acl *nacl;
1364
1365 lun = core_dev_get_lun(tpg, unpacked_lun);
1366 if (!lun) {
1367 pr_err("%s Logical Unit Number: %u is not active on"
1368 " Target Portal Group: %hu, ignoring request.\n",
1369 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1370 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1371 return -EINVAL;
1372 }
1373
1374 nacl = lacl->se_lun_nacl;
1375 if (!nacl)
1376 return -EINVAL;
1377
1378 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1379 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1380 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1381
1382 lacl->se_lun = lun;
1383
1384 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun,
1385 lun_access, nacl, tpg) < 0)
1386 return -EINVAL;
1387
1388 spin_lock(&lun->lun_acl_lock);
1389 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
1390 atomic_inc_mb(&lun->lun_acl_count);
1391 spin_unlock(&lun->lun_acl_lock);
1392
1393 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1394 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
1395 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
1396 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1397 lacl->initiatorname);
1398 /*
1399 * Check to see if there are any existing persistent reservation APTPL
1400 * pre-registrations that need to be enabled for this LUN ACL..
1401 */
1402 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
1403 return 0;
1404 }
1405
1406 /* core_dev_del_initiator_node_lun_acl():
1407 *
1408 *
1409 */
1410 int 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
1440 void 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
1453 static 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
1489 struct 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.is_nonrot = DA_IS_NONROT;
1547 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
1548 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
1549 dev->dev_attrib.max_unmap_block_desc_count =
1550 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
1551 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
1552 dev->dev_attrib.unmap_granularity_alignment =
1553 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
1554 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN;
1555 dev->dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS;
1556 dev->dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS;
1557
1558 xcopy_lun = &dev->xcopy_lun;
1559 xcopy_lun->lun_se_dev = dev;
1560 init_completion(&xcopy_lun->lun_shutdown_comp);
1561 INIT_LIST_HEAD(&xcopy_lun->lun_acl_list);
1562 spin_lock_init(&xcopy_lun->lun_acl_lock);
1563 spin_lock_init(&xcopy_lun->lun_sep_lock);
1564 init_completion(&xcopy_lun->lun_ref_comp);
1565
1566 return dev;
1567 }
1568
1569 int target_configure_device(struct se_device *dev)
1570 {
1571 struct se_hba *hba = dev->se_hba;
1572 int ret;
1573
1574 if (dev->dev_flags & DF_CONFIGURED) {
1575 pr_err("se_dev->se_dev_ptr already set for storage"
1576 " object\n");
1577 return -EEXIST;
1578 }
1579
1580 ret = dev->transport->configure_device(dev);
1581 if (ret)
1582 goto out;
1583 dev->dev_flags |= DF_CONFIGURED;
1584
1585 /*
1586 * XXX: there is not much point to have two different values here..
1587 */
1588 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size;
1589 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth;
1590
1591 /*
1592 * Align max_hw_sectors down to PAGE_SIZE I/O transfers
1593 */
1594 dev->dev_attrib.hw_max_sectors =
1595 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors,
1596 dev->dev_attrib.hw_block_size);
1597
1598 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX);
1599 dev->creation_time = get_jiffies_64();
1600
1601 ret = core_setup_alua(dev);
1602 if (ret)
1603 goto out;
1604
1605 /*
1606 * Startup the struct se_device processing thread
1607 */
1608 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1,
1609 dev->transport->name);
1610 if (!dev->tmr_wq) {
1611 pr_err("Unable to create tmr workqueue for %s\n",
1612 dev->transport->name);
1613 ret = -ENOMEM;
1614 goto out_free_alua;
1615 }
1616
1617 /*
1618 * Setup work_queue for QUEUE_FULL
1619 */
1620 INIT_WORK(&dev->qf_work_queue, target_qf_do_work);
1621
1622 /*
1623 * Preload the initial INQUIRY const values if we are doing
1624 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI
1625 * passthrough because this is being provided by the backend LLD.
1626 */
1627 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) {
1628 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8);
1629 strncpy(&dev->t10_wwn.model[0],
1630 dev->transport->inquiry_prod, 16);
1631 strncpy(&dev->t10_wwn.revision[0],
1632 dev->transport->inquiry_rev, 4);
1633 }
1634
1635 scsi_dump_inquiry(dev);
1636
1637 spin_lock(&hba->device_lock);
1638 hba->dev_count++;
1639 spin_unlock(&hba->device_lock);
1640
1641 mutex_lock(&g_device_mutex);
1642 list_add_tail(&dev->g_dev_node, &g_device_list);
1643 mutex_unlock(&g_device_mutex);
1644
1645 return 0;
1646
1647 out_free_alua:
1648 core_alua_free_lu_gp_mem(dev);
1649 out:
1650 se_release_vpd_for_dev(dev);
1651 return ret;
1652 }
1653
1654 void target_free_device(struct se_device *dev)
1655 {
1656 struct se_hba *hba = dev->se_hba;
1657
1658 WARN_ON(!list_empty(&dev->dev_sep_list));
1659
1660 if (dev->dev_flags & DF_CONFIGURED) {
1661 destroy_workqueue(dev->tmr_wq);
1662
1663 mutex_lock(&g_device_mutex);
1664 list_del(&dev->g_dev_node);
1665 mutex_unlock(&g_device_mutex);
1666
1667 spin_lock(&hba->device_lock);
1668 hba->dev_count--;
1669 spin_unlock(&hba->device_lock);
1670 }
1671
1672 core_alua_free_lu_gp_mem(dev);
1673 core_alua_set_lba_map(dev, NULL, 0, 0);
1674 core_scsi3_free_all_registrations(dev);
1675 se_release_vpd_for_dev(dev);
1676
1677 if (dev->transport->free_prot)
1678 dev->transport->free_prot(dev);
1679
1680 dev->transport->free_device(dev);
1681 }
1682
1683 int core_dev_setup_virtual_lun0(void)
1684 {
1685 struct se_hba *hba;
1686 struct se_device *dev;
1687 char buf[] = "rd_pages=8,rd_nullio=1";
1688 int ret;
1689
1690 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
1691 if (IS_ERR(hba))
1692 return PTR_ERR(hba);
1693
1694 dev = target_alloc_device(hba, "virt_lun0");
1695 if (!dev) {
1696 ret = -ENOMEM;
1697 goto out_free_hba;
1698 }
1699
1700 hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf));
1701
1702 ret = target_configure_device(dev);
1703 if (ret)
1704 goto out_free_se_dev;
1705
1706 lun0_hba = hba;
1707 g_lun0_dev = dev;
1708 return 0;
1709
1710 out_free_se_dev:
1711 target_free_device(dev);
1712 out_free_hba:
1713 core_delete_hba(hba);
1714 return ret;
1715 }
1716
1717
1718 void core_dev_release_virtual_lun0(void)
1719 {
1720 struct se_hba *hba = lun0_hba;
1721
1722 if (!hba)
1723 return;
1724
1725 if (g_lun0_dev)
1726 target_free_device(g_lun0_dev);
1727 core_delete_hba(hba);
1728 }
Linux kernel - Deliverables
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